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Add elfxx-x86.h and elfxx-x86.c
[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
252b5132
RH		 525
526/* The name of the dynamic interpreter. This is put in the .interp
527 section. */
528
529#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
530
f604c2a2 531/* The size in bytes of an entry in the lazy procedure linkage table. */
252b5132 532
f604c2a2 533#define LAZY_PLT_ENTRY_SIZE 16
252b5132 534
f604c2a2
L		 535/* The size in bytes of an entry in the non-lazy procedure linkage
536 table. */
252b5132 537
f604c2a2
L		 538#define NON_LAZY_PLT_ENTRY_SIZE 8
539
540/* The first entry in an absolute lazy procedure linkage table looks
541 like this. See the SVR4 ABI i386 supplement to see how this works.
542 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
543
544static const bfd_byte elf_i386_lazy_plt0_entry[12] =
252b5132
RH		 545{
546 0xff, 0x35, /* pushl contents of address */
547 0, 0, 0, 0, /* replaced with address of .got + 4. */
548 0xff, 0x25, /* jmp indirect */
eac338cf 549 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 550};
551
f604c2a2
L		 552/* Subsequent entries in an absolute lazy procedure linkage table look
553 like this. */
252b5132 554
f604c2a2 555static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 556{
557 0xff, 0x25, /* jmp indirect */
558 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
559 0x68, /* pushl immediate */
560 0, 0, 0, 0, /* replaced with offset into relocation table. */
561 0xe9, /* jmp relative */
562 0, 0, 0, 0 /* replaced with offset to start of .plt. */
563};
564
f604c2a2
L		 565/* The first entry in a PIC lazy procedure linkage table look like
566 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
567 lazy_plt->plt0_pad_byte. */
252b5132 568
f604c2a2 569static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
252b5132
RH		 570{
571 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 572 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 573};
574
f604c2a2
L		 575/* Subsequent entries in a PIC lazy procedure linkage table look like
576 this. */
252b5132 577
f604c2a2 578static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 579{
580 0xff, 0xa3, /* jmp *offset(%ebx) */
581 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
582 0x68, /* pushl immediate */
583 0, 0, 0, 0, /* replaced with offset into relocation table. */
584 0xe9, /* jmp relative */
585 0, 0, 0, 0 /* replaced with offset to start of .plt. */
586};
587
f604c2a2 588/* Entries in the non-lazy procedure linkage table look like this. */
dd7e64d4 589
f604c2a2 590static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 591{
592 0xff, 0x25, /* jmp indirect */
593 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
594 0x66, 0x90 /* xchg %ax,%ax */
595};
596
f604c2a2
L		 597/* Entries in the PIC non-lazy procedure linkage table look like
598 this. */
dd7e64d4 599
f604c2a2 600static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 601{
602 0xff, 0xa3, /* jmp *offset(%ebx) */
603 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
604 0x66, 0x90 /* xchg %ax,%ax */
605};
606
ee2fdd6f
L		 607/* The first entry in an absolute IBT-enabled lazy procedure linkage
608 table looks like this. */
609
610static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
611{
612 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
613 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
614 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
615};
616
617/* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
618 table look like this. Subsequent entries for a PIC IBT-enabled lazy
619 procedure linkage table are the same. */
620
621static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
622{
623 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
624 0x68, 0, 0, 0, 0, /* pushl immediate */
625 0xe9, 0, 0, 0, 0, /* jmp relative */
626 0x66, 0x90 /* xchg %ax,%ax */
627};
628
629/* The first entry in a PIC IBT-enabled lazy procedure linkage table
630 look like. */
631
632static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
633{
634 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
635 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
636 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
637};
638
639/* Entries for branches with IBT-enabled in the absolute non-lazey
640 procedure linkage table look like this. They have the same size
641 as the lazy PLT entry. */
642
643static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
644{
645 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
646 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
647 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
648};
649
650/* Entries for branches with IBT-enabled in the PIC non-lazey procedure
651 linkage table look like this. They have the same size as the lazy
652 PLT entry. */
653
654static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
655{
656 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
657 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
658 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
659};
660
f604c2a2 661/* .eh_frame covering the lazy .plt section. */
e41b3a13 662
f604c2a2 663static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
e41b3a13
JJ		 664{
665#define PLT_CIE_LENGTH 20
666#define PLT_FDE_LENGTH 36
667#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
668#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
669 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
670 0, 0, 0, 0, /* CIE ID */
671 1, /* CIE version */
672 'z', 'R', 0, /* Augmentation string */
673 1, /* Code alignment factor */
674 0x7c, /* Data alignment factor */
675 8, /* Return address column */
676 1, /* Augmentation size */
677 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
678 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
679 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
680 DW_CFA_nop, DW_CFA_nop,
681
682 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
683 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
684 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
685 0, 0, 0, 0, /* .plt size goes here */
686 0, /* Augmentation size */
687 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
688 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
689 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
690 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
691 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
692 11, /* Block length */
693 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
694 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
695 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
28ede8be 696 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
e41b3a13
JJ		 697 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
698};
699
ee2fdd6f
L		 700/* .eh_frame covering the lazy .plt section with IBT-enabled. */
701
702static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
703{
704 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
705 0, 0, 0, 0, /* CIE ID */
706 1, /* CIE version */
707 'z', 'R', 0, /* Augmentation string */
708 1, /* Code alignment factor */
709 0x7c, /* Data alignment factor */
710 8, /* Return address column */
711 1, /* Augmentation size */
712 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
713 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
714 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
715 DW_CFA_nop, DW_CFA_nop,
716
717 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
718 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
719 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
720 0, 0, 0, 0, /* .plt size goes here */
721 0, /* Augmentation size */
722 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
723 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
724 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
725 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
726 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
727 11, /* Block length */
728 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
729 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
730 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
731 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
732 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
733};
734
f604c2a2 735/* .eh_frame covering the non-lazy .plt section. */
fff53dae 736
f604c2a2 737static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
fff53dae
L		 738{
739#define PLT_GOT_FDE_LENGTH 16
740 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
741 0, 0, 0, 0, /* CIE ID */
742 1, /* CIE version */
743 'z', 'R', 0, /* Augmentation string */
744 1, /* Code alignment factor */
745 0x7c, /* Data alignment factor */
746 8, /* Return address column */
747 1, /* Augmentation size */
748 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
749 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
750 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
751 DW_CFA_nop, DW_CFA_nop,
752
753 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
754 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
f604c2a2
L		 755 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
756 0, 0, 0, 0, /* non-lazy .plt size goes here */
fff53dae
L		 757 0, /* Augmentation size */
758 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
759};
760
f604c2a2 761struct elf_i386_lazy_plt_layout
25e762b9 762{
f604c2a2
L		 763 /* The first entry in an absolute lazy procedure linkage table looks
764 like this. */
25e762b9
RM		 765 const bfd_byte *plt0_entry;
766 unsigned int plt0_entry_size;
767
f604c2a2
L		 768 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
769 GOT[2]. */
25e762b9
RM		 770 unsigned int plt0_got1_offset;
771 unsigned int plt0_got2_offset;
772
f604c2a2
L		 773 /* Later entries in an absolute lazy procedure linkage table look
774 like this. */
25e762b9
RM		 775 const bfd_byte *plt_entry;
776 unsigned int plt_entry_size;
777
778 /* Offsets into plt_entry that are to be replaced with... */
779 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
780 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
781 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
782
f604c2a2
L		 783 /* Offset into plt_entry where the initial value of the GOT entry
784 points. */
25e762b9
RM		 785 unsigned int plt_lazy_offset;
786
f604c2a2
L		 787 /* The first entry in a PIC lazy procedure linkage table looks like
788 this. */
25e762b9
RM		 789 const bfd_byte *pic_plt0_entry;
790
f604c2a2
L		 791 /* Subsequent entries in a PIC lazy procedure linkage table look
792 like this. */
25e762b9
RM		 793 const bfd_byte *pic_plt_entry;
794
f604c2a2 795 /* .eh_frame covering the lazy .plt section. */
25e762b9
RM		 796 const bfd_byte *eh_frame_plt;
797 unsigned int eh_frame_plt_size;
f604c2a2 798};
fff53dae 799
f604c2a2
L		 800struct elf_i386_non_lazy_plt_layout
801{
802 /* Entries in an absolute non-lazy procedure linkage table look like
803 this. */
804 const bfd_byte *plt_entry;
805 /* Entries in a PIC non-lazy procedure linkage table look like this. */
806 const bfd_byte *pic_plt_entry;
807
808 unsigned int plt_entry_size;
809
810 /* Offsets into plt_entry that are to be replaced with... */
811 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
812
813 /* .eh_frame covering the non-lazy .plt section. */
814 const bfd_byte *eh_frame_plt;
815 unsigned int eh_frame_plt_size;
25e762b9
RM		 816};
817
f604c2a2
L		 818struct elf_i386_plt_layout
819{
820 /* The first entry in a lazy procedure linkage table looks like this. */
821 const bfd_byte *plt0_entry;
822 /* Entries in a procedure linkage table look like this. */
823 const bfd_byte *plt_entry;
824 unsigned int plt_entry_size;
825
826 /* 1 has PLT0. */
827 unsigned int has_plt0;
828
829 /* Offsets into plt_entry that are to be replaced with... */
830 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
831
832 /* .eh_frame covering the .plt section. */
833 const bfd_byte *eh_frame_plt;
834 unsigned int eh_frame_plt_size;
835};
25e762b9
RM		 836
837/* These are the standard parameters. */
f604c2a2 838static const struct elf_i386_lazy_plt_layout elf_i386_lazy_plt =
25e762b9 839 {
f604c2a2
L		 840 elf_i386_lazy_plt0_entry, /* plt0_entry */
841 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
25e762b9
RM		 842 2, /* plt0_got1_offset */
843 8, /* plt0_got2_offset */
f604c2a2
L		 844 elf_i386_lazy_plt_entry, /* plt_entry */
845 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
25e762b9
RM		 846 2, /* plt_got_offset */
847 7, /* plt_reloc_offset */
848 12, /* plt_plt_offset */
849 6, /* plt_lazy_offset */
f604c2a2
L		 850 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
851 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
852 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
853 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
854 };
855
856static const struct elf_i386_non_lazy_plt_layout elf_i386_non_lazy_plt =
857 {
858 elf_i386_non_lazy_plt_entry, /* plt_entry */
859 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
860 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
861 2, /* plt_got_offset */
862 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
863 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
25e762b9 864 };
ee2fdd6f
L		 865
866static const struct elf_i386_lazy_plt_layout elf_i386_lazy_ibt_plt =
867 {
868 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
869 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
870 2, /* plt0_got1_offset */
871 8, /* plt0_got2_offset */
872 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
873 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
874 4+2, /* plt_got_offset */
875 4+1, /* plt_reloc_offset */
876 4+6, /* plt_plt_offset */
877 0, /* plt_lazy_offset */
878 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
879 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
880 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
881 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
882 };
883
884static const struct elf_i386_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
885 {
886 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
887 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
888 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
889 4+2, /* plt_got_offset */
890 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
891 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
892 };
25e762b9
RM		 893\f
894
eac338cf
PB		 895/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
896 for the PLTResolve stub and then for each PLT entry. */
897#define PLTRESOLVE_RELOCS_SHLIB 0
898#define PLTRESOLVE_RELOCS 2
899#define PLT_NON_JUMP_SLOT_RELOCS 2
900
23209a78
RM		 901/* Architecture-specific backend data for i386. */
902
903struct elf_i386_backend_data
904{
905 /* Value used to fill the unused bytes of the first PLT entry. */
906 bfd_byte plt0_pad_byte;
907
f604c2a2
L		 908 /* Target system. */
909 enum
910 {
911 is_normal,
912 is_vxworks,
913 is_nacl
914 } os;
23209a78
RM		 915};
916
917#define get_elf_i386_backend_data(abfd) \
918 ((const struct elf_i386_backend_data *) \
919 get_elf_backend_data (abfd)->arch_data)
920
921/* These are the standard parameters. */
922static const struct elf_i386_backend_data elf_i386_arch_bed =
923 {
924 0, /* plt0_pad_byte */
f604c2a2 925 is_normal /* os */
23209a78
RM		 926 };
927
928#define elf_backend_arch_data &elf_i386_arch_bed
929
0afcef53 930/* Values in tls_type of x86 ELF linker hash entry. */
37e55690
JJ		 931#define GOT_TLS_IE 4
932#define GOT_TLS_IE_POS 5
933#define GOT_TLS_IE_NEG 6
934#define GOT_TLS_IE_BOTH 7
67a4f2b7
AO		 935#define GOT_TLS_GDESC 8
936#define GOT_TLS_GD_BOTH_P(type) \
937 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
938#define GOT_TLS_GD_P(type) \
939 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
940#define GOT_TLS_GDESC_P(type) \
941 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
942#define GOT_TLS_GD_ANY_P(type) \
943 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
67a4f2b7 944
0ffa91dd
NC		 945#define is_i386_elf(bfd) \
946 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
947 && elf_tdata (bfd) != NULL \
4dfe6ac6 948 && elf_object_id (bfd) == I386_ELF_DATA)
0ffa91dd 949
b34976b6 950static bfd_boolean
55fd94b0 951elf_i386_mkobject (bfd *abfd)
13ae64f3 952{
0afcef53
L		 953 return bfd_elf_allocate_object (abfd,
954 sizeof (struct elf_x86_obj_tdata),
4dfe6ac6 955 I386_ELF_DATA);
13ae64f3 956}
cedb70c5 957
252b5132
RH		 958/* i386 ELF linker hash table. */
959
960struct elf_i386_link_hash_table
961{
0afcef53 962 struct elf_x86_link_hash_table x86;
9635fe29 963
0afcef53 964 /* Parameters describing PLT generation, lazy or non-lazy. */
f604c2a2
L		 965 struct elf_i386_plt_layout plt;
966
967 /* Parameters describing lazy PLT generation. */
968 const struct elf_i386_lazy_plt_layout *lazy_plt;
969
970 /* Parameters describing non-lazy PLT generation. */
971 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt;
972
4dfe6ac6
NC		 973 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
974 asection *srelplt2;
975
4dfe6ac6
NC		 976 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
977 bfd_vma next_tls_desc_index;
0afcef53 978};
e1f98742 979
0afcef53
L		 980#define elf_i386_next_tls_desc_index(htab) \
981 ((struct elf_i386_link_hash_table *) (htab))->next_tls_desc_index
e1f98742 982
0afcef53
L		 983#define elf_i386_srelplt2(htab) \
984 ((struct elf_i386_link_hash_table *) (htab))->srelplt2
2df3368d 985
0afcef53
L		 986#define elf_i386_plt(htab) \
987 ((struct elf_i386_link_hash_table *) (htab))->plt
252b5132 988
0afcef53
L		 989#define elf_i386_lazy_plt(htab) \
990 ((struct elf_i386_link_hash_table *) (htab))->lazy_plt
252b5132 991
0afcef53
L		 992#define elf_i386_non_lazy_plt(htab) \
993 ((struct elf_i386_link_hash_table *) (htab))->non_lazy_plt
252b5132 994
67a4f2b7 995#define elf_i386_compute_jump_table_size(htab) \
998d811a 996 ((htab)->elf.srelplt->reloc_count * 4)
67a4f2b7 997
252b5132
RH		 998/* Create an i386 ELF linker hash table. */
999
1000static struct bfd_link_hash_table *
55fd94b0 1001elf_i386_link_hash_table_create (bfd *abfd)
252b5132 1002{
0afcef53 1003 struct elf_x86_link_hash_table *ret;
dc810e39 1004 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
252b5132 1005
0afcef53 1006 ret = (struct elf_x86_link_hash_table *) bfd_zmalloc (amt);
ebe50bae 1007 if (ret == NULL)
252b5132
RH		 1008 return NULL;
1009
eb4ff4d6 1010 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
0afcef53
L		 1011 _bfd_x86_elf_link_hash_newfunc,
1012 sizeof (struct elf_x86_link_hash_entry),
4dfe6ac6 1013 I386_ELF_DATA))
252b5132 1014 {
e2d34d7d 1015 free (ret);
252b5132
RH		 1016 return NULL;
1017 }
1018
0afcef53
L		 1019 ret->r_info = elf32_r_info;
1020 ret->r_sym = elf32_r_sym;
1021 ret->pointer_r_type = R_386_32;
1022 ret->dynamic_interpreter_size = sizeof ELF_DYNAMIC_INTERPRETER;
1023 ret->dynamic_interpreter = ELF_DYNAMIC_INTERPRETER;
1024 ret->tls_get_addr = "___tls_get_addr";
c25bc9fc 1025 ret->loc_hash_table = htab_try_create (1024,
0afcef53
L		 1026 _bfd_x86_elf_local_htab_hash,
1027 _bfd_x86_elf_local_htab_eq,
c25bc9fc
L		 1028 NULL);
1029 ret->loc_hash_memory = objalloc_create ();
1030 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1031 {
0afcef53 1032 _bfd_x86_elf_link_hash_table_free (abfd);
c25bc9fc
L		 1033 return NULL;
1034 }
0afcef53 1035 ret->elf.root.hash_table_free = _bfd_x86_elf_link_hash_table_free;
c25bc9fc 1036
ebe50bae 1037 return &ret->elf.root;
252b5132
RH		 1038}
1039
142411ca
L		 1040/* Return TRUE if the TLS access code sequence support transition
1041 from R_TYPE. */
1042
1043static bfd_boolean
bedfd056 1044elf_i386_check_tls_transition (asection *sec,
142411ca
L		 1045 bfd_byte *contents,
1046 Elf_Internal_Shdr *symtab_hdr,
1047 struct elf_link_hash_entry **sym_hashes,
1048 unsigned int r_type,
1049 const Elf_Internal_Rela *rel,
1050 const Elf_Internal_Rela *relend)
13ae64f3 1051{
6eaa7fb5 1052 unsigned int val, type, reg;
142411ca
L		 1053 unsigned long r_symndx;
1054 struct elf_link_hash_entry *h;
1055 bfd_vma offset;
6eaa7fb5 1056 bfd_byte *call;
1d4af308 1057 bfd_boolean indirect_call;
142411ca 1058
142411ca 1059 offset = rel->r_offset;
13ae64f3 1060 switch (r_type)
142411ca
L		 1061 {
1062 case R_386_TLS_GD:
1063 case R_386_TLS_LDM:
1064 if (offset < 2 || (rel + 1) >= relend)
1065 return FALSE;
1066
6eaa7fb5
L		 1067 indirect_call = FALSE;
1068 call = contents + offset + 4;
1069 val = *(call - 5);
1070 type = *(call - 6);
142411ca
L		 1071 if (r_type == R_386_TLS_GD)
1072 {
09e8c3bf 1073 /* Check transition from GD access model. Only
6eaa7fb5
L		 1074 leal foo@tlsgd(,%ebx,1), %eax
1075 call ___tls_get_addr@PLT
1076 or
1077 leal foo@tlsgd(%ebx) %eax
1078 call ___tls_get_addr@PLT
1079 nop
1080 or
1081 leal foo@tlsgd(%reg), %eax
1082 call *___tls_get_addr@GOT(%reg)
1083 which may be converted to
1084 addr32 call ___tls_get_addr
142411ca 1085 can transit to different access model. */
6eaa7fb5
L		 1086 if ((offset + 10) > sec->size
1087 || (type != 0x8d && type != 0x04))
142411ca
L		 1088 return FALSE;
1089
142411ca
L		 1090 if (type == 0x04)
1091 {
6eaa7fb5
L		 1092 /* leal foo@tlsgd(,%ebx,1), %eax
1093 call ___tls_get_addr@PLT */
142411ca
L		 1094 if (offset < 3)
1095 return FALSE;
1096
6eaa7fb5
L		 1097 if (*(call - 7) != 0x8d
1098 || val != 0x1d
1099 || call[0] != 0xe8)
142411ca
L		 1100 return FALSE;
1101 }
1102 else
1103 {
6eaa7fb5
L		 1104 /* This must be
1105 leal foo@tlsgd(%ebx), %eax
1106 call ___tls_get_addr@PLT
1107 nop
1108 or
1109 leal foo@tlsgd(%reg), %eax
1110 call *___tls_get_addr@GOT(%reg)
1111 which may be converted to
1112 addr32 call ___tls_get_addr
1113
1114 %eax can't be used as the GOT base register since it
1115 is used to pass parameter to ___tls_get_addr. */
1116 reg = val & 7;
1117 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca
L		 1118 return FALSE;
1119
6eaa7fb5
L		 1120 indirect_call = call[0] == 0xff;
1121 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
1122 && !(call[0] == 0x67 && call[1] == 0xe8)
1123 && !(indirect_call
1124 && (call[1] & 0xf8) == 0x90
1125 && (call[1] & 0x7) == reg))
142411ca
L		 1126 return FALSE;
1127 }
1128 }
1129 else
1130 {
1131 /* Check transition from LD access model. Only
6eaa7fb5
L		 1132 leal foo@tlsldm(%ebx), %eax
1133 call ___tls_get_addr@PLT
1134 or
1135 leal foo@tlsldm(%reg), %eax
1136 call *___tls_get_addr@GOT(%reg)
1137 which may be converted to
1138 addr32 call ___tls_get_addr
142411ca
L		 1139 can transit to different access model. */
1140 if (type != 0x8d || (offset + 9) > sec->size)
1141 return FALSE;
1142
6eaa7fb5
L		 1143 /* %eax can't be used as the GOT base register since it is
1144 used to pass parameter to ___tls_get_addr. */
1145 reg = val & 7;
1146 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca 1147 return FALSE;
142411ca 1148
6eaa7fb5
L		 1149 indirect_call = call[0] == 0xff;
1150 if (!(reg == 3 && call[0] == 0xe8)
1151 && !(call[0] == 0x67 && call[1] == 0xe8)
1152 && !(indirect_call
1153 && (call[1] & 0xf8) == 0x90
1154 && (call[1] & 0x7) == reg))
1155 return FALSE;
1156 }
142411ca
L		 1157
1158 r_symndx = ELF32_R_SYM (rel[1].r_info);
1159 if (r_symndx < symtab_hdr->sh_info)
1160 return FALSE;
1161
1162 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1d4af308 1163 if (h == NULL
0afcef53 1164 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
6eaa7fb5
L		 1165 return FALSE;
1166 else if (indirect_call)
1167 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
1168 else
1169 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1170 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
142411ca
L		 1171
1172 case R_386_TLS_IE:
1173 /* Check transition from IE access model:
1174 movl foo@indntpoff(%rip), %eax
1175 movl foo@indntpoff(%rip), %reg
1176 addl foo@indntpoff(%rip), %reg
1177 */
1178
1179 if (offset < 1 || (offset + 4) > sec->size)
1180 return FALSE;
1181
1182 /* Check "movl foo@tpoff(%rip), %eax" first. */
1183 val = bfd_get_8 (abfd, contents + offset - 1);
1184 if (val == 0xa1)
1185 return TRUE;
1186
1187 if (offset < 2)
1188 return FALSE;
1189
1190 /* Check movl|addl foo@tpoff(%rip), %reg. */
1191 type = bfd_get_8 (abfd, contents + offset - 2);
1192 return ((type == 0x8b || type == 0x03)
1193 && (val & 0xc7) == 0x05);
1194
1195 case R_386_TLS_GOTIE:
1196 case R_386_TLS_IE_32:
1197 /* Check transition from {IE_32,GOTIE} access model:
1198 subl foo@{tpoff,gontoff}(%reg1), %reg2
1199 movl foo@{tpoff,gontoff}(%reg1), %reg2
1200 addl foo@{tpoff,gontoff}(%reg1), %reg2
1201 */
1202
1203 if (offset < 2 || (offset + 4) > sec->size)
1204 return FALSE;
1205
1206 val = bfd_get_8 (abfd, contents + offset - 1);
1207 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1208 return FALSE;
1209
1210 type = bfd_get_8 (abfd, contents + offset - 2);
1211 return type == 0x8b || type == 0x2b || type == 0x03;
1212
1213 case R_386_TLS_GOTDESC:
1214 /* Check transition from GDesc access model:
1215 leal x@tlsdesc(%ebx), %eax
1216
1217 Make sure it's a leal adding ebx to a 32-bit offset
1218 into any register, although it's probably almost always
1219 going to be eax. */
1220
1221 if (offset < 2 || (offset + 4) > sec->size)
1222 return FALSE;
1223
1224 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1225 return FALSE;
1226
1227 val = bfd_get_8 (abfd, contents + offset - 1);
1228 return (val & 0xc7) == 0x83;
1229
1230 case R_386_TLS_DESC_CALL:
1231 /* Check transition from GDesc access model:
6eaa7fb5 1232 call *x@tlsdesc(%eax)
142411ca
L		 1233 */
1234 if (offset + 2 <= sec->size)
1235 {
6eaa7fb5
L		 1236 /* Make sure that it's a call *x@tlsdesc(%eax). */
1237 call = contents + offset;
1238 return call[0] == 0xff && call[1] == 0x10;
142411ca
L		 1239 }
1240
1241 return FALSE;
1242
1243 default:
1244 abort ();
1245 }
1246}
1247
1248/* Return TRUE if the TLS access transition is OK or no transition
1249 will be performed. Update R_TYPE if there is a transition. */
1250
1251static bfd_boolean
1252elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1253 asection *sec, bfd_byte *contents,
1254 Elf_Internal_Shdr *symtab_hdr,
1255 struct elf_link_hash_entry **sym_hashes,
1256 unsigned int *r_type, int tls_type,
1257 const Elf_Internal_Rela *rel,
1258 const Elf_Internal_Rela *relend,
4c544807 1259 struct elf_link_hash_entry *h,
bedfd056
L		 1260 unsigned long r_symndx,
1261 bfd_boolean from_relocate_section)
142411ca
L		 1262{
1263 unsigned int from_type = *r_type;
1264 unsigned int to_type = from_type;
1265 bfd_boolean check = TRUE;
1266
bb1cb422
L		 1267 /* Skip TLS transition for functions. */
1268 if (h != NULL
1269 && (h->type == STT_FUNC
1270 || h->type == STT_GNU_IFUNC))
1271 return TRUE;
1272
142411ca 1273 switch (from_type)
13ae64f3
JJ		 1274 {
1275 case R_386_TLS_GD:
67a4f2b7
AO		 1276 case R_386_TLS_GOTDESC:
1277 case R_386_TLS_DESC_CALL:
13ae64f3 1278 case R_386_TLS_IE_32:
37e55690
JJ		 1279 case R_386_TLS_IE:
1280 case R_386_TLS_GOTIE:
0e1862bb 1281 if (bfd_link_executable (info))
142411ca
L		 1282 {
1283 if (h == NULL)
1284 to_type = R_386_TLS_LE_32;
1285 else if (from_type != R_386_TLS_IE
1286 && from_type != R_386_TLS_GOTIE)
1287 to_type = R_386_TLS_IE_32;
1288 }
1289
bedfd056
L		 1290 /* When we are called from elf_i386_relocate_section, there may
1291 be additional transitions based on TLS_TYPE. */
1292 if (from_relocate_section)
142411ca
L		 1293 {
1294 unsigned int new_to_type = to_type;
1295
0e1862bb 1296 if (bfd_link_executable (info)
142411ca
L		 1297 && h != NULL
1298 && h->dynindx == -1
1299 && (tls_type & GOT_TLS_IE))
1300 new_to_type = R_386_TLS_LE_32;
1301
1302 if (to_type == R_386_TLS_GD
1303 || to_type == R_386_TLS_GOTDESC
1304 || to_type == R_386_TLS_DESC_CALL)
1305 {
1306 if (tls_type == GOT_TLS_IE_POS)
1307 new_to_type = R_386_TLS_GOTIE;
1308 else if (tls_type & GOT_TLS_IE)
1309 new_to_type = R_386_TLS_IE_32;
1310 }
1311
1312 /* We checked the transition before when we were called from
1313 elf_i386_check_relocs. We only want to check the new
1314 transition which hasn't been checked before. */
1315 check = new_to_type != to_type && from_type == to_type;
1316 to_type = new_to_type;
1317 }
1318
1319 break;
1320
13ae64f3 1321 case R_386_TLS_LDM:
0e1862bb 1322 if (bfd_link_executable (info))
142411ca
L		 1323 to_type = R_386_TLS_LE_32;
1324 break;
1325
1326 default:
1327 return TRUE;
1328 }
1329
1330 /* Return TRUE if there is no transition. */
1331 if (from_type == to_type)
1332 return TRUE;
1333
1334 /* Check if the transition can be performed. */
1335 if (check
bedfd056 1336 && ! elf_i386_check_tls_transition (sec, contents,
142411ca
L		 1337 symtab_hdr, sym_hashes,
1338 from_type, rel, relend))
1339 {
2f629d23 1340 reloc_howto_type *from, *to;
4c544807 1341 const char *name;
142411ca
L		 1342
1343 from = elf_i386_rtype_to_howto (abfd, from_type);
1344 to = elf_i386_rtype_to_howto (abfd, to_type);
1345
4c544807
L		 1346 if (h)
1347 name = h->root.root.string;
1348 else
1349 {
0afcef53 1350 struct elf_x86_link_hash_table *htab;
4dfe6ac6 1351
0afcef53 1352 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 1353 if (htab == NULL)
1354 name = "*unknown*";
1355 else
1356 {
1357 Elf_Internal_Sym *isym;
1358
1359 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1360 abfd, r_symndx);
1361 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1362 }
4c544807
L		 1363 }
1364
4eca0228 1365 _bfd_error_handler
695344c0 1366 /* xgettext:c-format */
d42c267e 1367 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
142411ca 1368 "in section `%A' failed"),
c08bb8dd 1369 abfd, from->name, to->name, name,
d42c267e 1370 rel->r_offset, sec);
142411ca
L		 1371 bfd_set_error (bfd_error_bad_value);
1372 return FALSE;
13ae64f3
JJ		 1373 }
1374
142411ca
L		 1375 *r_type = to_type;
1376 return TRUE;
13ae64f3
JJ		 1377}
1378
c175a657
L		 1379/* With the local symbol, foo, we convert
1380 mov foo@GOT[(%reg1)], %reg2
1381 to
1382 lea foo[@GOTOFF(%reg1)], %reg2
1383 and convert
1384 call/jmp *foo@GOT[(%reg)]
1385 to
1386 nop call foo/jmp foo nop
1387 When PIC is false, convert
1388 test %reg1, foo@GOT[(%reg2)]
1389 to
1390 test $foo, %reg1
1391 and convert
1392 binop foo@GOT[(%reg1)], %reg2
1393 to
1394 binop $foo, %reg2
1395 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1396 instructions. */
1397
1398static
1399bfd_boolean
1400elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1401 bfd_byte *contents,
1402 Elf_Internal_Rela *irel,
1403 struct elf_link_hash_entry *h,
1404 bfd_boolean *converted,
1405 struct bfd_link_info *link_info)
1406{
0afcef53 1407 struct elf_x86_link_hash_table *htab;
c175a657
L		 1408 unsigned int opcode;
1409 unsigned int modrm;
1410 bfd_boolean baseless;
1411 Elf_Internal_Sym *isym;
1412 unsigned int addend;
1413 unsigned int nop;
1414 bfd_vma nop_offset;
1415 bfd_boolean is_pic;
1416 bfd_boolean to_reloc_32;
1417 unsigned int r_type;
1418 unsigned int r_symndx;
1419 bfd_vma roff = irel->r_offset;
1420
1421 if (roff < 2)
1422 return TRUE;
1423
7d4d9709 1424 /* Addend for R_386_GOT32X relocations must be 0. */
c175a657
L		 1425 addend = bfd_get_32 (abfd, contents + roff);
1426 if (addend != 0)
1427 return TRUE;
1428
0afcef53 1429 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
c175a657
L		 1430 is_pic = bfd_link_pic (link_info);
1431
1432 r_type = ELF32_R_TYPE (irel->r_info);
1433 r_symndx = ELF32_R_SYM (irel->r_info);
1434
1435 modrm = bfd_get_8 (abfd, contents + roff - 1);
1436 baseless = (modrm & 0xc7) == 0x5;
1437
7d4d9709 1438 if (baseless && is_pic)
c175a657
L		 1439 {
1440 /* For PIC, disallow R_386_GOT32X without a base register
7d4d9709 1441 since we don't know what the GOT base is. */
c175a657
L		 1442 const char *name;
1443
1444 if (h == NULL)
1445 {
1446 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1447 r_symndx);
1448 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1449 }
1450 else
1451 name = h->root.root.string;
1452
4eca0228 1453 _bfd_error_handler
695344c0 1454 /* xgettext:c-format */
63a5468a
AM		 1455 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1456 " register can not be used when making a shared object"),
c175a657
L		 1457 abfd, name);
1458 return FALSE;
1459 }
1460
1461 opcode = bfd_get_8 (abfd, contents + roff - 2);
1462
c175a657
L		 1463 /* Convert to R_386_32 if PIC is false or there is no base
1464 register. */
1465 to_reloc_32 = !is_pic || baseless;
1466
7d4d9709
L		 1467 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1468 reloc. */
c175a657
L		 1469 if (h == NULL)
1470 {
1471 if (opcode == 0x0ff)
1472 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1473 goto convert_branch;
1474 else
1475 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1476 "test %reg1, foo@GOT(%reg2)" and
1477 "binop foo@GOT[(%reg1)], %reg2". */
1478 goto convert_load;
1479 }
1480
1481 /* Undefined weak symbol is only bound locally in executable
1482 and its reference is resolved as 0. */
0afcef53
L		 1483 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, I386_ELF_DATA, TRUE,
1484 elf_x86_hash_entry (h)))
c175a657
L		 1485 {
1486 if (opcode == 0xff)
1487 {
1488 /* No direct branch to 0 for PIC. */
1489 if (is_pic)
1490 return TRUE;
1491 else
1492 goto convert_branch;
1493 }
1494 else
1495 {
1496 /* We can convert load of address 0 to R_386_32. */
1497 to_reloc_32 = TRUE;
1498 goto convert_load;
1499 }
1500 }
1501
1502 if (opcode == 0xff)
1503 {
1504 /* We have "call/jmp *foo@GOT[(%reg)]". */
1505 if ((h->root.type == bfd_link_hash_defined
1506 || h->root.type == bfd_link_hash_defweak)
1507 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1508 {
1509 /* The function is locally defined. */
1510convert_branch:
1511 /* Convert R_386_GOT32X to R_386_PC32. */
1512 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1513 {
0afcef53
L		 1514 struct elf_x86_link_hash_entry *eh
1515 = (struct elf_x86_link_hash_entry *) h;
6eaa7fb5 1516
c175a657
L		 1517 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1518 is a nop prefix. */
1519 modrm = 0xe8;
6eaa7fb5
L		 1520 /* To support TLS optimization, always use addr32 prefix
1521 for "call *___tls_get_addr@GOT(%reg)". */
1d4af308 1522 if (eh && eh->tls_get_addr)
c175a657 1523 {
6eaa7fb5
L		 1524 nop = 0x67;
1525 nop_offset = irel->r_offset - 2;
c175a657
L		 1526 }
1527 else
6eaa7fb5
L		 1528 {
1529 nop = link_info->call_nop_byte;
1530 if (link_info->call_nop_as_suffix)
1531 {
1532 nop_offset = roff + 3;
1533 irel->r_offset -= 1;
1534 }
1535 else
1536 nop_offset = roff - 2;
1537 }
c175a657
L		 1538 }
1539 else
1540 {
1541 /* Convert to "jmp foo nop". */
1542 modrm = 0xe9;
1543 nop = NOP_OPCODE;
1544 nop_offset = roff + 3;
1545 irel->r_offset -= 1;
1546 }
1547
1548 bfd_put_8 (abfd, nop, contents + nop_offset);
1549 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1550 /* When converting to PC-relative relocation, we
1551 need to adjust addend by -4. */
1552 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1553 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1554
1555 *converted = TRUE;
1556 }
1557 }
1558 else
1559 {
1560 /* We have "mov foo@GOT[(%re1g)], %reg2",
1561 "test %reg1, foo@GOT(%reg2)" and
1562 "binop foo@GOT[(%reg1)], %reg2".
1563
1564 Avoid optimizing _DYNAMIC since ld.so may use its
1565 link-time address. */
1566 if (h == htab->elf.hdynamic)
1567 return TRUE;
1568
1569 /* def_regular is set by an assignment in a linker script in
cbd0eecf
L		 1570 bfd_elf_record_link_assignment. start_stop is set on
1571 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1572 if (h->start_stop
1573 || ((h->def_regular
1574 || h->root.type == bfd_link_hash_defined
1575 || h->root.type == bfd_link_hash_defweak)
1576 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
c175a657
L		 1577 {
1578convert_load:
1579 if (opcode == 0x8b)
1580 {
1581 if (to_reloc_32)
1582 {
1583 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1584 "mov $foo, %reg2" with R_386_32. */
1585 r_type = R_386_32;
1586 modrm = 0xc0 | (modrm & 0x38) >> 3;
1587 bfd_put_8 (abfd, modrm, contents + roff - 1);
1588 opcode = 0xc7;
1589 }
1590 else
1591 {
1592 /* Convert "mov foo@GOT(%reg1), %reg2" to
1593 "lea foo@GOTOFF(%reg1), %reg2". */
1594 r_type = R_386_GOTOFF;
1595 opcode = 0x8d;
1596 }
1597 }
1598 else
1599 {
1600 /* Only R_386_32 is supported. */
1601 if (!to_reloc_32)
1602 return TRUE;
1603
1604 if (opcode == 0x85)
1605 {
1606 /* Convert "test %reg1, foo@GOT(%reg2)" to
1607 "test $foo, %reg1". */
1608 modrm = 0xc0 | (modrm & 0x38) >> 3;
1609 opcode = 0xf7;
1610 }
1611 else
1612 {
1613 /* Convert "binop foo@GOT(%reg1), %reg2" to
1614 "binop $foo, %reg2". */
1615 modrm = (0xc0
1616 | (modrm & 0x38) >> 3
1617 | (opcode & 0x3c));
1618 opcode = 0x81;
1619 }
1620 bfd_put_8 (abfd, modrm, contents + roff - 1);
1621 r_type = R_386_32;
1622 }
1623
1624 bfd_put_8 (abfd, opcode, contents + roff - 2);
1625 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1626
1627 *converted = TRUE;
1628 }
1629 }
1630
1631 return TRUE;
1632}
1633
c1d11331
L		 1634/* Rename some of the generic section flags to better document how they
1635 are used here. */
c337a162
L		 1636#define need_convert_load sec_flg0
1637#define check_relocs_failed sec_flg1
c1d11331 1638
252b5132 1639/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1640 calculate needed space in the global offset table, procedure linkage
1641 table, and dynamic reloc sections. */
252b5132 1642
b34976b6 1643static bfd_boolean
55fd94b0
AM		 1644elf_i386_check_relocs (bfd *abfd,
1645 struct bfd_link_info *info,
1646 asection *sec,
1647 const Elf_Internal_Rela *relocs)
252b5132 1648{
0afcef53 1649 struct elf_x86_link_hash_table *htab;
252b5132
RH		 1650 Elf_Internal_Shdr *symtab_hdr;
1651 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1652 const Elf_Internal_Rela *rel;
1653 const Elf_Internal_Rela *rel_end;
252b5132 1654 asection *sreloc;
bedfd056 1655 bfd_byte *contents;
252b5132 1656
0e1862bb 1657 if (bfd_link_relocatable (info))
b34976b6 1658 return TRUE;
252b5132 1659
081b1afe
L		 1660 /* Don't do anything special with non-loaded, non-alloced sections.
1661 In particular, any relocs in such sections should not affect GOT
1662 and PLT reference counting (ie. we don't allow them to create GOT
1663 or PLT entries), there's no possibility or desire to optimize TLS
1664 relocs, and there's not much point in propagating relocs to shared
1665 libs that the dynamic linker won't relocate. */
1666 if ((sec->flags & SEC_ALLOC) == 0)
1667 return TRUE;
1668
0ffa91dd
NC		 1669 BFD_ASSERT (is_i386_elf (abfd));
1670
0afcef53 1671 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6 1672 if (htab == NULL)
c337a162
L		 1673 {
1674 sec->check_relocs_failed = 1;
1675 return FALSE;
1676 }
4dfe6ac6 1677
bedfd056
L		 1678 /* Get the section contents. */
1679 if (elf_section_data (sec)->this_hdr.contents != NULL)
1680 contents = elf_section_data (sec)->this_hdr.contents;
1681 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1682 {
1683 sec->check_relocs_failed = 1;
1684 return FALSE;
1685 }
1686
0ffa91dd 1687 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1688 sym_hashes = elf_sym_hashes (abfd);
252b5132 1689
252b5132
RH		 1690 sreloc = NULL;
1691
1692 rel_end = relocs + sec->reloc_count;
1693 for (rel = relocs; rel < rel_end; rel++)
1694 {
13ae64f3 1695 unsigned int r_type;
d42c267e 1696 unsigned int r_symndx;
252b5132 1697 struct elf_link_hash_entry *h;
0afcef53 1698 struct elf_x86_link_hash_entry *eh;
4c544807
L		 1699 Elf_Internal_Sym *isym;
1700 const char *name;
06a6a421 1701 bfd_boolean size_reloc;
252b5132
RH		 1702
1703 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1704 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1705
d9bc7a44 1706 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1707 {
695344c0 1708 /* xgettext:c-format */
4eca0228
AM		 1709 _bfd_error_handler (_("%B: bad symbol index: %d"),
1710 abfd, r_symndx);
c337a162 1711 goto error_return;
f5f31454
L		 1712 }
1713
252b5132 1714 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1715 {
1716 /* A local symbol. */
c2e61a4e
L		 1717 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1718 abfd, r_symndx);
1719 if (isym == NULL)
c337a162 1720 goto error_return;
c25bc9fc
L		 1721
1722 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1723 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1724 {
0afcef53 1725 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1726 if (h == NULL)
c337a162 1727 goto error_return;
6bbec505 1728
c25bc9fc 1729 /* Fake a STT_GNU_IFUNC symbol. */
6322e5c5
L		 1730 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1731 isym, NULL);
c25bc9fc
L		 1732 h->type = STT_GNU_IFUNC;
1733 h->def_regular = 1;
1734 h->ref_regular = 1;
1735 h->forced_local = 1;
1736 h->root.type = bfd_link_hash_defined;
1737 }
1738 else
1739 h = NULL;
1740 }
252b5132 1741 else
71cb9464 1742 {
4c544807 1743 isym = NULL;
71cb9464
L		 1744 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1745 while (h->root.type == bfd_link_hash_indirect
1746 || h->root.type == bfd_link_hash_warning)
1747 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1748 }
cbe950e9 1749
0afcef53 1750 eh = (struct elf_x86_link_hash_entry *) h;
c25bc9fc
L		 1751 if (h != NULL)
1752 {
f604c2a2
L		 1753 if (r_type == R_386_GOTOFF)
1754 eh->gotoff_ref = 1;
cbe950e9 1755
ad1e85de
L		 1756 /* It is referenced by a non-shared object. */
1757 h->ref_regular = 1;
bc4e12de 1758 h->root.non_ir_ref_regular = 1;
13a2df29
L		 1759
1760 if (h->type == STT_GNU_IFUNC)
1761 elf_tdata (info->output_bfd)->has_gnu_symbols
1762 |= elf_gnu_symbol_ifunc;
71cb9464 1763 }
252b5132 1764
bedfd056 1765 if (! elf_i386_tls_transition (info, abfd, sec, contents,
142411ca
L		 1766 symtab_hdr, sym_hashes,
1767 &r_type, GOT_UNKNOWN,
bedfd056 1768 rel, rel_end, h, r_symndx, FALSE))
c337a162 1769 goto error_return;
13ae64f3
JJ		 1770
1771 switch (r_type)
252b5132 1772 {
37e55690 1773 case R_386_TLS_LDM:
0afcef53 1774 htab->tls_ld_or_ldm_got.refcount += 1;
37e55690
JJ		 1775 goto create_got;
1776
1777 case R_386_PLT32:
1778 /* This symbol requires a procedure linkage table entry. We
1779 actually build the entry in adjust_dynamic_symbol,
1780 because this might be a case of linking PIC code which is
1781 never referenced by a dynamic object, in which case we
1782 don't need to generate a procedure linkage table entry
1783 after all. */
1784
1785 /* If this is a local symbol, we resolve it directly without
1786 creating a procedure linkage table entry. */
1787 if (h == NULL)
1788 continue;
1789
aec6b87e 1790 eh->has_got_reloc = 1;
f5385ebf 1791 h->needs_plt = 1;
37e55690
JJ		 1792 h->plt.refcount += 1;
1793 break;
1794
6a3e1bae 1795 case R_386_SIZE32:
06a6a421 1796 size_reloc = TRUE;
6a3e1bae
L		 1797 goto do_size;
1798
13ae64f3 1799 case R_386_TLS_IE_32:
37e55690
JJ		 1800 case R_386_TLS_IE:
1801 case R_386_TLS_GOTIE:
0e1862bb 1802 if (!bfd_link_executable (info))
13ae64f3 1803 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1804 /* Fall through */
1805
252b5132 1806 case R_386_GOT32:
02a86693 1807 case R_386_GOT32X:
13ae64f3 1808 case R_386_TLS_GD:
67a4f2b7
AO		 1809 case R_386_TLS_GOTDESC:
1810 case R_386_TLS_DESC_CALL:
252b5132 1811 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1812 {
1813 int tls_type, old_tls_type;
1814
1815 switch (r_type)
1816 {
1817 default:
02a86693
L		 1818 case R_386_GOT32:
1819 case R_386_GOT32X:
1820 tls_type = GOT_NORMAL;
1821 break;
13ae64f3 1822 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1823 case R_386_TLS_GOTDESC:
1824 case R_386_TLS_DESC_CALL:
1825 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1826 case R_386_TLS_IE_32:
1827 if (ELF32_R_TYPE (rel->r_info) == r_type)
1828 tls_type = GOT_TLS_IE_NEG;
1829 else
ebcfb3c0
JJ		 1830 /* If this is a GD->IE transition, we may use either of
1831 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1832 tls_type = GOT_TLS_IE;
1833 break;
1834 case R_386_TLS_IE:
1835 case R_386_TLS_GOTIE:
1836 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1837 }
1838
1839 if (h != NULL)
1840 {
1841 h->got.refcount += 1;
0afcef53 1842 old_tls_type = elf_x86_hash_entry (h)->tls_type;
13ae64f3
JJ		 1843 }
1844 else
1845 {
1846 bfd_signed_vma *local_got_refcounts;
1847
1848 /* This is a global offset table entry for a local symbol. */
1849 local_got_refcounts = elf_local_got_refcounts (abfd);
1850 if (local_got_refcounts == NULL)
1851 {
1852 bfd_size_type size;
1853
1854 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1855 size *= (sizeof (bfd_signed_vma)
1856 + sizeof (bfd_vma) + sizeof(char));
a50b1753
NC		 1857 local_got_refcounts = (bfd_signed_vma *)
1858 bfd_zalloc (abfd, size);
13ae64f3 1859 if (local_got_refcounts == NULL)
c337a162 1860 goto error_return;
13ae64f3 1861 elf_local_got_refcounts (abfd) = local_got_refcounts;
0afcef53 1862 elf_x86_local_tlsdesc_gotent (abfd)
67a4f2b7 1863 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
0afcef53 1864 elf_x86_local_got_tls_type (abfd)
67a4f2b7 1865 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3
JJ		 1866 }
1867 local_got_refcounts[r_symndx] += 1;
0afcef53 1868 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
13ae64f3
JJ		 1869 }
1870
37e55690
JJ		 1871 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1872 tls_type |= old_tls_type;
13ae64f3
JJ		 1873 /* If a TLS symbol is accessed using IE at least once,
1874 there is no point to use dynamic model for it. */
ebcfb3c0 1875 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1876 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1877 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1878 {
67a4f2b7 1879 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1880 tls_type = old_tls_type;
67a4f2b7
AO		 1881 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1882 && GOT_TLS_GD_ANY_P (tls_type))
1883 tls_type |= old_tls_type;
13ae64f3
JJ		 1884 else
1885 {
09a24cbf 1886 if (h)
4c544807
L		 1887 name = h->root.root.string;
1888 else
1889 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1890 NULL);
4eca0228 1891 _bfd_error_handler
695344c0 1892 /* xgettext:c-format */
d003868e 1893 (_("%B: `%s' accessed both as normal and "
55fd94b0 1894 "thread local symbol"),
4c544807 1895 abfd, name);
68c4a57e 1896 bfd_set_error (bfd_error_bad_value);
c337a162 1897 goto error_return;
13ae64f3
JJ		 1898 }
1899 }
1900
1901 if (old_tls_type != tls_type)
1902 {
1903 if (h != NULL)
0afcef53 1904 elf_x86_hash_entry (h)->tls_type = tls_type;
13ae64f3 1905 else
0afcef53 1906 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
13ae64f3
JJ		 1907 }
1908 }
0ac8d2ca
AM		 1909 /* Fall through */
1910
1911 case R_386_GOTOFF:
1912 case R_386_GOTPC:
13ae64f3 1913 create_got:
37e55690 1914 if (r_type != R_386_TLS_IE)
aec6b87e
L		 1915 {
1916 if (eh != NULL)
1917 eh->has_got_reloc = 1;
1918 break;
1919 }
37e55690 1920 /* Fall through */
252b5132 1921
37e55690
JJ		 1922 case R_386_TLS_LE_32:
1923 case R_386_TLS_LE:
aec6b87e
L		 1924 if (eh != NULL)
1925 eh->has_got_reloc = 1;
0e1862bb 1926 if (bfd_link_executable (info))
37e55690 1927 break;
bffbf940 1928 info->flags |= DF_STATIC_TLS;
aec6b87e 1929 goto do_relocation;
252b5132
RH		 1930
1931 case R_386_32:
1932 case R_386_PC32:
aec6b87e
L		 1933 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1934 eh->has_non_got_reloc = 1;
1935do_relocation:
bf52d7c7
L		 1936 /* We are called after all symbols have been resolved. Only
1937 relocation against STT_GNU_IFUNC symbol must go through
1938 PLT. */
d1ed1c7d
L		 1939 if (h != NULL
1940 && (bfd_link_executable (info)
bf52d7c7 1941 || h->type == STT_GNU_IFUNC))
6725bdbf 1942 {
12d0ee4a 1943 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1944 need a copy reloc. We can't check reliably at this
1945 stage whether the section is read-only, as input
1946 sections have not yet been mapped to output sections.
1947 Tentatively set the flag for now, and correct in
1948 adjust_dynamic_symbol. */
f5385ebf 1949 h->non_got_ref = 1;
12d0ee4a 1950
233cc9c1
L		 1951 /* We may need a .plt entry if the symbol is a function
1952 defined in a shared lib or is a STT_GNU_IFUNC function
1953 referenced from the code or read-only section. */
34bb2571
L		 1954 if (!h->def_regular
1955 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
233cc9c1
L		 1956 h->plt.refcount += 1;
1957
4b627c18
L		 1958 if (r_type == R_386_PC32)
1959 {
1960 /* Since something like ".long foo - ." may be used
1961 as pointer, make sure that PLT is used if foo is
1962 a function defined in a shared library. */
1963 if ((sec->flags & SEC_CODE) == 0)
1964 h->pointer_equality_needed = 1;
74437ea2
L		 1965 else if (h->type == STT_GNU_IFUNC
1966 && bfd_link_pic (info))
1967 {
6322e5c5
L		 1968 _bfd_error_handler
1969 /* xgettext:c-format */
1970 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
1971 abfd, h->root.root.string);
74437ea2
L		 1972 bfd_set_error (bfd_error_bad_value);
1973 goto error_return;
1974 }
4b627c18
L		 1975 }
1976 else
04ebc307
L		 1977 {
1978 h->pointer_equality_needed = 1;
1979 /* R_386_32 can be resolved at run-time. */
1980 if (r_type == R_386_32
1981 && (sec->flags & SEC_READONLY) == 0)
1982 eh->func_pointer_refcount += 1;
1983 }
6725bdbf 1984 }
7843f00e 1985
06a6a421 1986 size_reloc = FALSE;
6a3e1bae 1987do_size:
252b5132 1988 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1989 against a global symbol, or a non PC relative reloc
1990 against a local symbol, then we need to copy the reloc
1991 into the shared library. However, if we are linking with
1992 -Bsymbolic, we do not need to copy a reloc against a
1993 global symbol which is defined in an object we are
1994 including in the link (i.e., DEF_REGULAR is set). At
1995 this point we have not seen all the input files, so it is
1996 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1997 later (it is never cleared). In case of a weak definition,
1998 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1999 a shared library. We account for that possibility below by
1f655a09
L		 2000 storing information in the relocs_copied field of the hash
2001 table entry. A similar situation occurs when creating
2002 shared libraries and symbol visibility changes render the
12d0ee4a 2003 symbol local.
56882138 2004
12d0ee4a
AM		 2005 If on the other hand, we are creating an executable, we
2006 may need to keep relocations for symbols satisfied by a
2007 dynamic library if we manage to avoid copy relocs for the
233cc9c1
L		 2008 symbol.
2009
2010 Generate dynamic pointer relocation against STT_GNU_IFUNC
2011 symbol in the non-code section. */
081b1afe
L		 2012 if ((bfd_link_pic (info)
2013 && (r_type != R_386_PC32
2014 || (h != NULL
2015 && (! (bfd_link_pie (info)
2016 || SYMBOLIC_BIND (info, h))
2017 || h->root.type == bfd_link_hash_defweak
2018 || !h->def_regular))))
233cc9c1
L		 2019 || (h != NULL
2020 && h->type == STT_GNU_IFUNC
2021 && r_type == R_386_32
2022 && (sec->flags & SEC_CODE) == 0)
081b1afe
L		 2023 || (ELIMINATE_COPY_RELOCS
2024 && !bfd_link_pic (info)
2025 && h != NULL
2026 && (h->root.type == bfd_link_hash_defweak
2027 || !h->def_regular)))
252b5132 2028 {
e03a8ed8
L		 2029 struct elf_dyn_relocs *p;
2030 struct elf_dyn_relocs **head;
ec338859 2031
12d0ee4a
AM		 2032 /* We must copy these reloc types into the output file.
2033 Create a reloc section in dynobj and make room for
2034 this reloc. */
252b5132
RH		 2035 if (sreloc == NULL)
2036 {
83bac4b0
NC		 2037 sreloc = _bfd_elf_make_dynamic_reloc_section
2038 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
2039
252b5132 2040 if (sreloc == NULL)
c337a162 2041 goto error_return;
252b5132
RH		 2042 }
2043
0c715baa
AM		 2044 /* If this is a global symbol, we count the number of
2045 relocations we need for this symbol. */
2046 if (h != NULL)
252b5132 2047 {
d5597ebc 2048 head = &eh->dyn_relocs;
0c715baa
AM		 2049 }
2050 else
2051 {
ec338859
AM		 2052 /* Track dynamic relocs needed for local syms too.
2053 We really need local syms available to do this
2054 easily. Oh well. */
87d72d41 2055 void **vpp;
ec338859 2056 asection *s;
87d72d41
AM		 2057
2058 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2059 abfd, r_symndx);
2060 if (isym == NULL)
c337a162 2061 goto error_return;
87d72d41
AM		 2062
2063 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 2064 if (s == NULL)
87d72d41 2065 s = sec;
ec338859 2066
e81d3500 2067 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 2068 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 2069 }
2070
2071 p = *head;
2072 if (p == NULL || p->sec != sec)
2073 {
2074 bfd_size_type amt = sizeof *p;
a50b1753
NC		 2075 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
2076 amt);
ec338859 2077 if (p == NULL)
c337a162 2078 goto error_return;
ec338859
AM		 2079 p->next = *head;
2080 *head = p;
2081 p->sec = sec;
2082 p->count = 0;
2083 p->pc_count = 0;
252b5132 2084 }
ec338859
AM		 2085
2086 p->count += 1;
06a6a421
L		 2087 /* Count size relocation as PC-relative relocation. */
2088 if (r_type == R_386_PC32 || size_reloc)
ec338859 2089 p->pc_count += 1;
252b5132 2090 }
252b5132
RH		 2091 break;
2092
2093 /* This relocation describes the C++ object vtable hierarchy.
2094 Reconstruct it for later use during GC. */
2095 case R_386_GNU_VTINHERIT:
d17e0c6e 2096 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c337a162 2097 goto error_return;
252b5132
RH		 2098 break;
2099
2100 /* This relocation describes which C++ vtable entries are actually
2101 used. Record for later use during GC. */
2102 case R_386_GNU_VTENTRY:
c6aa130f
MS		 2103 BFD_ASSERT (h != NULL);
2104 if (h != NULL
2105 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c337a162 2106 goto error_return;
252b5132
RH		 2107 break;
2108
2109 default:
2110 break;
2111 }
dd7e64d4 2112
52bf37dd 2113 if (r_type == R_386_GOT32X
c1d11331 2114 && (h == NULL || h->type != STT_GNU_IFUNC))
02a86693 2115 sec->need_convert_load = 1;
252b5132
RH		 2116 }
2117
bedfd056
L		 2118 if (elf_section_data (sec)->this_hdr.contents != contents)
2119 {
2120 if (!info->keep_memory)
2121 free (contents);
2122 else
2123 {
2124 /* Cache the section contents for elf_link_input_bfd. */
2125 elf_section_data (sec)->this_hdr.contents = contents;
2126 }
2127 }
2128
b34976b6 2129 return TRUE;
c337a162
L		 2130
2131error_return:
bedfd056
L		 2132 if (elf_section_data (sec)->this_hdr.contents != contents)
2133 free (contents);
c337a162
L		 2134 sec->check_relocs_failed = 1;
2135 return FALSE;
252b5132
RH		 2136}
2137
2138/* Return the section that should be marked against GC for a given
2139 relocation. */
2140
2141static asection *
55fd94b0 2142elf_i386_gc_mark_hook (asection *sec,
07adf181 2143 struct bfd_link_info *info,
55fd94b0
AM		 2144 Elf_Internal_Rela *rel,
2145 struct elf_link_hash_entry *h,
2146 Elf_Internal_Sym *sym)
252b5132
RH		 2147{
2148 if (h != NULL)
07adf181
AM		 2149 switch (ELF32_R_TYPE (rel->r_info))
2150 {
2151 case R_386_GNU_VTINHERIT:
2152 case R_386_GNU_VTENTRY:
2153 return NULL;
2154 }
2155
2156 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132
RH		 2157}
2158
252b5132
RH		 2159/* Adjust a symbol defined by a dynamic object and referenced by a
2160 regular object. The current definition is in some section of the
2161 dynamic object, but we're not including those sections. We have to
2162 change the definition to something the rest of the link can
2163 understand. */
2164
b34976b6 2165static bfd_boolean
55fd94b0
AM		 2166elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2167 struct elf_link_hash_entry *h)
252b5132 2168{
0afcef53 2169 struct elf_x86_link_hash_table *htab;
5474d94f 2170 asection *s, *srel;
0afcef53 2171 struct elf_x86_link_hash_entry *eh;
5ca5bb35 2172 struct elf_dyn_relocs *p;
252b5132 2173
cbe950e9
L		 2174 /* STT_GNU_IFUNC symbol must go through PLT. */
2175 if (h->type == STT_GNU_IFUNC)
2176 {
73bcf233
L		 2177 /* All local STT_GNU_IFUNC references must be treate as local
2178 calls via local PLT. */
5ca5bb35
L		 2179 if (h->ref_regular
2180 && SYMBOL_CALLS_LOCAL (info, h))
2181 {
73bcf233 2182 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L		 2183 struct elf_dyn_relocs **pp;
2184
0afcef53 2185 eh = (struct elf_x86_link_hash_entry *) h;
5ca5bb35
L		 2186 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2187 {
2188 pc_count += p->pc_count;
2189 p->count -= p->pc_count;
2190 p->pc_count = 0;
73bcf233 2191 count += p->count;
5ca5bb35
L		 2192 if (p->count == 0)
2193 *pp = p->next;
2194 else
2195 pp = &p->next;
2196 }
2197
73bcf233 2198 if (pc_count || count)
5ca5bb35 2199 {
5ca5bb35 2200 h->non_got_ref = 1;
233cc9c1
L		 2201 if (pc_count)
2202 {
2203 /* Increment PLT reference count only for PC-relative
2204 references. */
2205 h->needs_plt = 1;
2206 if (h->plt.refcount <= 0)
2207 h->plt.refcount = 1;
2208 else
2209 h->plt.refcount += 1;
2210 }
5ca5bb35
L		 2211 }
2212 }
2213
cbe950e9
L		 2214 if (h->plt.refcount <= 0)
2215 {
2216 h->plt.offset = (bfd_vma) -1;
2217 h->needs_plt = 0;
2218 }
2219 return TRUE;
2220 }
2221
252b5132
RH		 2222 /* If this is a function, put it in the procedure linkage table. We
2223 will fill in the contents of the procedure linkage table later,
2224 when we know the address of the .got section. */
2225 if (h->type == STT_FUNC
f5385ebf 2226 || h->needs_plt)
252b5132 2227 {
6725bdbf 2228 if (h->plt.refcount <= 0
9c7a29a3
AM		 2229 || SYMBOL_CALLS_LOCAL (info, h)
2230 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2231 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2232 {
2233 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM		 2234 file, but the symbol was never referred to by a dynamic
2235 object, or if all references were garbage collected. In
2236 such a case, we don't actually need to build a procedure
2237 linkage table, and we can just do a PC32 reloc instead. */
bbd7ec4a 2238 h->plt.offset = (bfd_vma) -1;
f5385ebf 2239 h->needs_plt = 0;
252b5132
RH		 2240 }
2241
b34976b6 2242 return TRUE;
252b5132 2243 }
6725bdbf
AM		 2244 else
2245 /* It's possible that we incorrectly decided a .plt reloc was
2246 needed for an R_386_PC32 reloc to a non-function sym in
2247 check_relocs. We can't decide accurately between function and
2248 non-function syms in check-relocs; Objects loaded later in
2249 the link may change h->type. So fix it now. */
bbd7ec4a 2250 h->plt.offset = (bfd_vma) -1;
252b5132 2251
0afcef53 2252 eh = (struct elf_x86_link_hash_entry *) h;
a5b4ee94 2253
252b5132
RH		 2254 /* If this is a weak symbol, and there is a real definition, the
2255 processor independent code will have arranged for us to see the
2256 real definition first, and we can just use the same value. */
f6e332e6 2257 if (h->u.weakdef != NULL)
252b5132 2258 {
f6e332e6
AM		 2259 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2260 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2261 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2262 h->root.u.def.value = h->u.weakdef->root.u.def.value;
a5b4ee94
L		 2263 if (ELIMINATE_COPY_RELOCS
2264 || info->nocopyreloc
2265 || SYMBOL_NO_COPYRELOC (info, eh))
f6e332e6 2266 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 2267 return TRUE;
252b5132
RH		 2268 }
2269
2270 /* This is a reference to a symbol defined by a dynamic object which
2271 is not a function. */
2272
2273 /* If we are creating a shared library, we must presume that the
2274 only references to the symbol are via the global offset table.
2275 For such cases we need not do anything here; the relocations will
2276 be handled correctly by relocate_section. */
0e1862bb 2277 if (!bfd_link_executable (info))
b34976b6 2278 return TRUE;
252b5132 2279
7843f00e 2280 /* If there are no references to this symbol that do not use the
d5597ebc
L		 2281 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2282 reloc. */
d5597ebc 2283 if (!h->non_got_ref && !eh->gotoff_ref)
b34976b6 2284 return TRUE;
7843f00e 2285
8bd621d8 2286 /* If -z nocopyreloc was given, we won't generate them either. */
a5b4ee94 2287 if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh))
8bd621d8 2288 {
f5385ebf 2289 h->non_got_ref = 0;
b34976b6 2290 return TRUE;
8bd621d8
AM		 2291 }
2292
0afcef53 2293 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2294 if (htab == NULL)
2295 return FALSE;
643796e3 2296
d5597ebc
L		 2297 /* If there aren't any dynamic relocs in read-only sections nor
2298 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2299 avoid the copy reloc. This doesn't work on VxWorks, where we can
2300 not have dynamic relocations (other than copy and jump slot
2301 relocations) in an executable. */
23209a78 2302 if (ELIMINATE_COPY_RELOCS
d5597ebc 2303 && !eh->gotoff_ref
f604c2a2 2304 && get_elf_i386_backend_data (info->output_bfd)->os != is_vxworks)
ebe50bae 2305 {
a23b6845
AM		 2306 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2307 {
2308 s = p->sec->output_section;
2309 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2310 break;
2311 }
2312
a23b6845
AM		 2313 if (p == NULL)
2314 {
f5385ebf 2315 h->non_got_ref = 0;
a23b6845
AM		 2316 return TRUE;
2317 }
ebe50bae
AM		 2318 }
2319
252b5132
RH		 2320 /* We must allocate the symbol in our .dynbss section, which will
2321 become part of the .bss section of the executable. There will be
2322 an entry for this symbol in the .dynsym section. The dynamic
2323 object will contain position independent code, so all references
2324 from the dynamic object to this symbol will go through the global
2325 offset table. The dynamic linker will use the .dynsym entry to
2326 determine the address it must put in the global offset table, so
2327 both the dynamic object and the regular object will refer to the
2328 same memory location for the variable. */
2329
252b5132
RH		 2330 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2331 copy the initial value out of the dynamic object and into the
0ac8d2ca 2332 runtime process image. */
5474d94f
AM		 2333 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2334 {
2335 s = htab->elf.sdynrelro;
2336 srel = htab->elf.sreldynrelro;
2337 }
2338 else
2339 {
2340 s = htab->elf.sdynbss;
2341 srel = htab->elf.srelbss;
2342 }
1d7e9d18 2343 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
252b5132 2344 {
5474d94f 2345 srel->size += sizeof (Elf32_External_Rel);
f5385ebf 2346 h->needs_copy = 1;
252b5132
RH		 2347 }
2348
6cabe1ea 2349 return _bfd_elf_adjust_dynamic_copy (info, h, s);
252b5132
RH		 2350}
2351
6725bdbf 2352/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 2353 dynamic relocs. */
6725bdbf 2354
b34976b6 2355static bfd_boolean
eb4ff4d6 2356elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 2357{
2358 struct bfd_link_info *info;
0afcef53
L		 2359 struct elf_x86_link_hash_table *htab;
2360 struct elf_x86_link_hash_entry *eh;
e03a8ed8 2361 struct elf_dyn_relocs *p;
25e762b9 2362 unsigned plt_entry_size;
aec6b87e 2363 bfd_boolean resolved_to_zero;
f604c2a2 2364 const struct elf_i386_backend_data *bed;
0afcef53
L		 2365 const struct elf_i386_plt_layout *plt_layout;
2366 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt_layout;
6725bdbf 2367
e92d460e 2368 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2369 return TRUE;
6725bdbf 2370
0afcef53 2371 eh = (struct elf_x86_link_hash_entry *) h;
e92d460e 2372
6725bdbf 2373 info = (struct bfd_link_info *) inf;
0afcef53 2374 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2375 if (htab == NULL)
2376 return FALSE;
6725bdbf 2377
f604c2a2
L		 2378 bed = get_elf_i386_backend_data (info->output_bfd);
2379
0afcef53
L		 2380 plt_layout = &elf_i386_plt (htab);
2381 non_lazy_plt_layout = elf_i386_non_lazy_plt (htab);
2382 plt_entry_size = plt_layout->plt_entry_size;
25e762b9 2383
e62b9723 2384 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
0afcef53 2385 I386_ELF_DATA,
e62b9723
L		 2386 eh->has_got_reloc,
2387 eh);
aec6b87e 2388
04ebc307
L		 2389 /* Clear the reference count of function pointer relocations if
2390 symbol isn't a normal function. */
2391 if (h->type != STT_FUNC)
2392 eh->func_pointer_refcount = 0;
2393
dd7e64d4
L		 2394 /* We can't use the GOT PLT if pointer equality is needed since
2395 finish_dynamic_symbol won't clear symbol value and the dynamic
2396 linker won't update the GOT slot. We will get into an infinite
2397 loop at run-time. */
2398 if (htab->plt_got != NULL
2399 && h->type != STT_GNU_IFUNC
2400 && !h->pointer_equality_needed
2401 && h->plt.refcount > 0
2402 && h->got.refcount > 0)
2403 {
2404 /* Don't use the regular PLT if there are both GOT and GOTPLT
2405 reloctions. */
2406 h->plt.offset = (bfd_vma) -1;
2407
2408 /* Use the GOT PLT. */
2409 eh->plt_got.refcount = 1;
2410 }
2411
cbe950e9
L		 2412 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2413 here if it is defined and referenced in a non-shared object. */
2414 if (h->type == STT_GNU_IFUNC
2415 && h->def_regular)
ee2fdd6f
L		 2416 {
2417 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2418 &htab->readonly_dynrelocs_against_ifunc,
2419 plt_entry_size,
0afcef53
L		 2420 (plt_layout->has_plt0
2421 * plt_entry_size),
ee2fdd6f
L		 2422 4, TRUE))
2423 {
2424 asection *s = htab->plt_second;
2425 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2426 {
2427 /* Use the second PLT section if it is created. */
2428 eh->plt_second.offset = s->size;
2429
2430 /* Make room for this entry in the second PLT section. */
0afcef53 2431 s->size += non_lazy_plt_layout->plt_entry_size;
ee2fdd6f
L		 2432 }
2433
2434 return TRUE;
2435 }
2436 else
2437 return FALSE;
2438 }
04ebc307
L		 2439 /* Don't create the PLT entry if there are only function pointer
2440 relocations which can be resolved at run-time. */
cbe950e9 2441 else if (htab->elf.dynamic_sections_created
04ebc307
L		 2442 && (h->plt.refcount > eh->func_pointer_refcount
2443 || eh->plt_got.refcount > 0))
6725bdbf 2444 {
dc2be3d2 2445 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
25070364 2446
04ebc307
L		 2447 /* Clear the reference count of function pointer relocations
2448 if PLT is used. */
2449 eh->func_pointer_refcount = 0;
2450
5a15f56f
AM		 2451 /* Make sure this symbol is output as a dynamic symbol.
2452 Undefined weak syms won't yet be marked as dynamic. */
2453 if (h->dynindx == -1
aec6b87e 2454 && !h->forced_local
0dc9a308
L		 2455 && !resolved_to_zero
2456 && h->root.type == bfd_link_hash_undefweak)
5a15f56f 2457 {
c152c796 2458 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2459 return FALSE;
5a15f56f
AM		 2460 }
2461
0e1862bb 2462 if (bfd_link_pic (info)
4e795f50 2463 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 2464 {
6de2ae4a 2465 asection *s = htab->elf.splt;
ee2fdd6f 2466 asection *second_s = htab->plt_second;
dd7e64d4 2467 asection *got_s = htab->plt_got;
6725bdbf 2468
7c1e8d3e
L		 2469 /* If this is the first .plt entry, make room for the special
2470 first entry. The .plt section is used by prelink to undo
2471 prelinking for dynamic relocations. */
2472 if (s->size == 0)
0afcef53 2473 s->size = plt_layout->has_plt0 * plt_entry_size;
7c1e8d3e 2474
dd7e64d4
L		 2475 if (use_plt_got)
2476 eh->plt_got.offset = got_s->size;
2477 else
ee2fdd6f
L		 2478 {
2479 h->plt.offset = s->size;
2480 if (second_s)
2481 eh->plt_second.offset = second_s->size;
2482 }
6725bdbf 2483
ced53ee5
AM		 2484 /* If this symbol is not defined in a regular file, and we are
2485 not generating a shared library, then set the symbol to this
2486 location in the .plt. This is required to make function
2487 pointers compare as equal between the normal executable and
2488 the shared library. */
0e1862bb 2489 if (! bfd_link_pic (info)
f5385ebf 2490 && !h->def_regular)
ced53ee5 2491 {
dd7e64d4
L		 2492 if (use_plt_got)
2493 {
2494 /* We need to make a call to the entry of the GOT PLT
2495 instead of regular PLT entry. */
2496 h->root.u.def.section = got_s;
2497 h->root.u.def.value = eh->plt_got.offset;
2498 }
2499 else
2500 {
ee2fdd6f
L		 2501 if (second_s)
2502 {
2503 /* We need to make a call to the entry of the
2504 second PLT instead of regular PLT entry. */
2505 h->root.u.def.section = second_s;
2506 h->root.u.def.value = eh->plt_second.offset;
2507 }
2508 else
2509 {
2510 h->root.u.def.section = s;
2511 h->root.u.def.value = h->plt.offset;
2512 }
dd7e64d4 2513 }
ced53ee5 2514 }
6725bdbf 2515
ced53ee5 2516 /* Make room for this entry. */
dd7e64d4 2517 if (use_plt_got)
0afcef53 2518 got_s->size += non_lazy_plt_layout->plt_entry_size;
dd7e64d4
L		 2519 else
2520 {
2521 s->size += plt_entry_size;
ee2fdd6f 2522 if (second_s)
0afcef53 2523 second_s->size += non_lazy_plt_layout->plt_entry_size;
6725bdbf 2524
dd7e64d4
L		 2525 /* We also need to make an entry in the .got.plt section,
2526 which will be placed in the .got section by the linker
2527 script. */
2528 htab->elf.sgotplt->size += 4;
6725bdbf 2529
aec6b87e
L		 2530 /* There should be no PLT relocation against resolved
2531 undefined weak symbol in executable. */
2532 if (!resolved_to_zero)
2533 {
2534 /* We also need to make an entry in the .rel.plt
2535 section. */
2536 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2537 htab->elf.srelplt->reloc_count++;
2538 }
dd7e64d4 2539 }
eac338cf 2540
f604c2a2 2541 if (bed->os == is_vxworks && !bfd_link_pic (info))
eac338cf
PB		 2542 {
2543 /* VxWorks has a second set of relocations for each PLT entry
2544 in executables. They go in a separate relocation section,
2545 which is processed by the kernel loader. */
2546
2547 /* There are two relocations for the initial PLT entry: an
2548 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2549 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2550
0afcef53 2551 asection *srelplt2 = elf_i386_srelplt2 (htab);
25e762b9 2552 if (h->plt.offset == plt_entry_size)
0afcef53 2553 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
eac338cf
PB		 2554
2555 /* There are two extra relocations for each subsequent PLT entry:
2556 an R_386_32 relocation for the GOT entry, and an R_386_32
2557 relocation for the PLT entry. */
2558
0afcef53 2559 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
eac338cf 2560 }
6725bdbf 2561 }
ced53ee5
AM		 2562 else
2563 {
13f42277 2564 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2565 h->plt.offset = (bfd_vma) -1;
f5385ebf 2566 h->needs_plt = 0;
ced53ee5 2567 }
6725bdbf
AM		 2568 }
2569 else
2570 {
13f42277 2571 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2572 h->plt.offset = (bfd_vma) -1;
f5385ebf 2573 h->needs_plt = 0;
6725bdbf
AM		 2574 }
2575
67a4f2b7
AO		 2576 eh->tlsdesc_got = (bfd_vma) -1;
2577
37e55690 2578 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 2579 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2580 if (h->got.refcount > 0
0e1862bb 2581 && bfd_link_executable (info)
13ae64f3 2582 && h->dynindx == -1
0afcef53 2583 && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE))
cedb70c5 2584 h->got.offset = (bfd_vma) -1;
13ae64f3 2585 else if (h->got.refcount > 0)
6725bdbf 2586 {
0ac8d2ca 2587 asection *s;
b34976b6 2588 bfd_boolean dyn;
0afcef53 2589 int tls_type = elf_x86_hash_entry (h)->tls_type;
6725bdbf 2590
5a15f56f 2591 /* Make sure this symbol is output as a dynamic symbol.
0dc9a308 2592 Undefined weak syms won't yet be marked as dynamic. */
5a15f56f 2593 if (h->dynindx == -1
aec6b87e 2594 && !h->forced_local
e133d005 2595 && !resolved_to_zero
0dc9a308 2596 && h->root.type == bfd_link_hash_undefweak)
5a15f56f 2597 {
c152c796 2598 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2599 return FALSE;
5a15f56f
AM		 2600 }
2601
6de2ae4a 2602 s = htab->elf.sgot;
67a4f2b7
AO		 2603 if (GOT_TLS_GDESC_P (tls_type))
2604 {
6de2ae4a 2605 eh->tlsdesc_got = htab->elf.sgotplt->size
67a4f2b7 2606 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2607 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 2608 h->got.offset = (bfd_vma) -2;
2609 }
2610 if (! GOT_TLS_GDESC_P (tls_type)
2611 || GOT_TLS_GD_P (tls_type))
2612 {
2613 h->got.offset = s->size;
2614 s->size += 4;
2615 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2616 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2617 s->size += 4;
2618 }
ebe50bae 2619 dyn = htab->elf.dynamic_sections_created;
13ae64f3 2620 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 2621 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2622 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2623 need two), R_386_TLS_GD needs one if local symbol and two if
aec6b87e
L		 2624 global. No dynamic relocation against resolved undefined weak
2625 symbol in executable. */
37e55690 2626 if (tls_type == GOT_TLS_IE_BOTH)
6de2ae4a 2627 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2628 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
37e55690 2629 || (tls_type & GOT_TLS_IE))
6de2ae4a 2630 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2631 else if (GOT_TLS_GD_P (tls_type))
6de2ae4a 2632 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2633 else if (! GOT_TLS_GDESC_P (tls_type)
aec6b87e
L		 2634 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2635 && !resolved_to_zero)
67a4f2b7 2636 || h->root.type != bfd_link_hash_undefweak)
0e1862bb 2637 && (bfd_link_pic (info)
ef5aade5 2638 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6de2ae4a 2639 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2640 if (GOT_TLS_GDESC_P (tls_type))
6de2ae4a 2641 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 2642 }
2643 else
51b64d56 2644 h->got.offset = (bfd_vma) -1;
6725bdbf 2645
5a15f56f 2646 if (eh->dyn_relocs == NULL)
b34976b6 2647 return TRUE;
5a15f56f 2648
0c715baa
AM		 2649 /* In the shared -Bsymbolic case, discard space allocated for
2650 dynamic pc-relative relocs against symbols which turn out to be
2651 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 2652 space for pc-relative relocs that have become local due to symbol
2653 visibility changes. */
0c715baa 2654
0e1862bb 2655 if (bfd_link_pic (info))
5a15f56f 2656 {
09695f56
AM		 2657 /* The only reloc that uses pc_count is R_386_PC32, which will
2658 appear on a call or on something like ".long foo - .". We
2659 want calls to protected symbols to resolve directly to the
2660 function rather than going via the plt. If people want
2661 function pointer comparisons to work as expected then they
2662 should avoid writing assembly like ".long foo - .". */
2663 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 2664 {
e03a8ed8 2665 struct elf_dyn_relocs **pp;
0c715baa
AM		 2666
2667 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2668 {
c3ce498c
L		 2669 p->count -= p->pc_count;
2670 p->pc_count = 0;
0c715baa
AM		 2671 if (p->count == 0)
2672 *pp = p->next;
2673 else
2674 pp = &p->next;
2675 }
5a15f56f 2676 }
4e795f50 2677
f604c2a2 2678 if (bed->os == is_vxworks)
3348747a 2679 {
e03a8ed8 2680 struct elf_dyn_relocs **pp;
3348747a
NS		 2681 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2682 {
2683 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2684 *pp = p->next;
2685 else
2686 pp = &p->next;
2687 }
2688 }
2689
4e795f50 2690 /* Also discard relocs on undefined weak syms with non-default
aec6b87e 2691 visibility or in PIE. */
22d606e9 2692 if (eh->dyn_relocs != NULL
c353e543 2693 && h->root.type == bfd_link_hash_undefweak)
22d606e9 2694 {
aec6b87e
L		 2695 /* Undefined weak symbol is never bound locally in shared
2696 library. */
2697 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2698 || resolved_to_zero)
2699 {
2700 if (h->non_got_ref)
2701 {
2702 /* Keep dynamic non-GOT/non-PLT relocation so that we
2703 can branch to 0 without PLT. */
2704 struct elf_dyn_relocs **pp;
2705
2706 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2707 if (p->pc_count == 0)
2708 *pp = p->next;
2709 else
2710 {
2711 /* Remove non-R_386_PC32 relocation. */
2712 p->count = p->pc_count;
2713 pp = &p->next;
2714 }
22d606e9 2715
aec6b87e
L		 2716 if (eh->dyn_relocs != NULL)
2717 {
2718 /* Make sure undefined weak symbols are output
2719 as dynamic symbols in PIEs for dynamic non-GOT
2720 non-PLT reloations. */
2721 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2722 return FALSE;
2723 }
2724 }
2725 else
2726 eh->dyn_relocs = NULL;
2727 }
22d606e9
AM		 2728 else if (h->dynindx == -1
2729 && !h->forced_local)
2730 {
2731 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2732 return FALSE;
2733 }
2734 }
0c715baa 2735 }
a23b6845 2736 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 2737 {
2738 /* For the non-shared case, discard space for relocs against
2739 symbols which turn out to need copy relocs or are not
04ebc307
L		 2740 dynamic. Keep dynamic relocations for run-time function
2741 pointer initialization. */
0c715baa 2742
aec6b87e
L		 2743 if ((!h->non_got_ref
2744 || eh->func_pointer_refcount > 0
2745 || (h->root.type == bfd_link_hash_undefweak
2746 && !resolved_to_zero))
f5385ebf
AM		 2747 && ((h->def_dynamic
2748 && !h->def_regular)
ebe50bae 2749 || (htab->elf.dynamic_sections_created
0c715baa
AM		 2750 && (h->root.type == bfd_link_hash_undefweak
2751 || h->root.type == bfd_link_hash_undefined))))
2752 {
2753 /* Make sure this symbol is output as a dynamic symbol.
2754 Undefined weak syms won't yet be marked as dynamic. */
2755 if (h->dynindx == -1
aec6b87e 2756 && !h->forced_local
0dc9a308
L		 2757 && !resolved_to_zero
2758 && h->root.type == bfd_link_hash_undefweak)
0c715baa 2759 {
c152c796 2760 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2761 return FALSE;
0c715baa 2762 }
5a15f56f 2763
0c715baa
AM		 2764 /* If that succeeded, we know we'll be keeping all the
2765 relocs. */
2766 if (h->dynindx != -1)
2767 goto keep;
2768 }
2769
2770 eh->dyn_relocs = NULL;
04ebc307 2771 eh->func_pointer_refcount = 0;
0c715baa 2772
ec338859 2773 keep: ;
5a15f56f
AM		 2774 }
2775
0c715baa
AM		 2776 /* Finally, allocate space. */
2777 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 2778 {
e7c33416
NC		 2779 asection *sreloc;
2780
cbe950e9 2781 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2782
2783 BFD_ASSERT (sreloc != NULL);
eea6121a 2784 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 2785 }
2786
b34976b6 2787 return TRUE;
6725bdbf
AM		 2788}
2789
c25bc9fc
L		 2790/* Allocate space in .plt, .got and associated reloc sections for
2791 local dynamic relocs. */
2792
2793static bfd_boolean
2794elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2795{
2796 struct elf_link_hash_entry *h
2797 = (struct elf_link_hash_entry *) *slot;
2798
2799 if (h->type != STT_GNU_IFUNC
2800 || !h->def_regular
2801 || !h->ref_regular
2802 || !h->forced_local
2803 || h->root.type != bfd_link_hash_defined)
2804 abort ();
2805
2806 return elf_i386_allocate_dynrelocs (h, inf);
2807}
2808
c175a657 2809/* Convert load via the GOT slot to load immediate. */
daa67607
L		 2810
2811static bfd_boolean
02a86693 2812elf_i386_convert_load (bfd *abfd, asection *sec,
a6af384b 2813 struct bfd_link_info *link_info)
daa67607 2814{
0afcef53 2815 struct elf_x86_link_hash_table *htab;
daa67607
L		 2816 Elf_Internal_Shdr *symtab_hdr;
2817 Elf_Internal_Rela *internal_relocs;
2818 Elf_Internal_Rela *irel, *irelend;
2819 bfd_byte *contents;
c175a657 2820 bfd_boolean changed;
daa67607
L		 2821 bfd_signed_vma *local_got_refcounts;
2822
2823 /* Don't even try to convert non-ELF outputs. */
2824 if (!is_elf_hash_table (link_info->hash))
2825 return FALSE;
2826
c1d11331 2827 /* Nothing to do if there is no need or no output. */
daa67607 2828 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
02a86693 2829 || sec->need_convert_load == 0
c8831961 2830 || bfd_is_abs_section (sec->output_section))
daa67607
L		 2831 return TRUE;
2832
2833 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2834
2835 /* Load the relocations for this section. */
2836 internal_relocs = (_bfd_elf_link_read_relocs
2837 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2838 link_info->keep_memory));
2839 if (internal_relocs == NULL)
2840 return FALSE;
2841
c175a657 2842 changed = FALSE;
0afcef53 2843 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
daa67607
L		 2844 local_got_refcounts = elf_local_got_refcounts (abfd);
2845
2846 /* Get the section contents. */
2847 if (elf_section_data (sec)->this_hdr.contents != NULL)
2848 contents = elf_section_data (sec)->this_hdr.contents;
2849 else
2850 {
2851 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2852 goto error_return;
2853 }
2854
2855 irelend = internal_relocs + sec->reloc_count;
2856 for (irel = internal_relocs; irel < irelend; irel++)
2857 {
2858 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
c175a657 2859 unsigned int r_symndx;
daa67607 2860 struct elf_link_hash_entry *h;
c175a657 2861 bfd_boolean converted;
daa67607 2862
7d4d9709
L		 2863 /* Don't convert R_386_GOT32 since we can't tell if it is applied
2864 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
2865 if (r_type != R_386_GOT32X)
daa67607
L		 2866 continue;
2867
c175a657 2868 r_symndx = ELF32_R_SYM (irel->r_info);
02a86693 2869 if (r_symndx < symtab_hdr->sh_info)
0afcef53
L		 2870 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2871 (const Elf_Internal_Rela *) irel,
2872 FALSE);
c175a657 2873 else
02a86693 2874 {
c175a657
L		 2875 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2876 while (h->root.type == bfd_link_hash_indirect
2877 || h->root.type == bfd_link_hash_warning)
2878 h = (struct elf_link_hash_entry *) h->root.u.i.link;
daa67607
L		 2879 }
2880
02a86693 2881 /* STT_GNU_IFUNC must keep GOT32 relocations. */
c175a657 2882 if (h != NULL && h->type == STT_GNU_IFUNC)
02a86693
L		 2883 continue;
2884
c175a657
L		 2885 converted = FALSE;
2886 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
2887 irel, h, &converted, link_info))
2888 goto error_return;
bae420ef 2889
c175a657 2890 if (converted)
02a86693 2891 {
c175a657
L		 2892 changed = converted;
2893 if (h)
02a86693 2894 {
c175a657
L		 2895 if (h->got.refcount > 0)
2896 h->got.refcount -= 1;
02a86693 2897 }
c175a657 2898 else
02a86693 2899 {
c175a657
L		 2900 if (local_got_refcounts != NULL
2901 && local_got_refcounts[r_symndx] > 0)
2902 local_got_refcounts[r_symndx] -= 1;
02a86693 2903 }
daa67607
L		 2904 }
2905 }
2906
2907 if (contents != NULL
2908 && elf_section_data (sec)->this_hdr.contents != contents)
2909 {
c175a657 2910 if (!changed && !link_info->keep_memory)
daa67607
L		 2911 free (contents);
2912 else
2913 {
2914 /* Cache the section contents for elf_link_input_bfd. */
2915 elf_section_data (sec)->this_hdr.contents = contents;
2916 }
2917 }
2918
2919 if (elf_section_data (sec)->relocs != internal_relocs)
2920 {
c175a657 2921 if (!changed)
daa67607
L		 2922 free (internal_relocs);
2923 else
2924 elf_section_data (sec)->relocs = internal_relocs;
2925 }
2926
2927 return TRUE;
2928
2929 error_return:
2930 if (contents != NULL
2931 && elf_section_data (sec)->this_hdr.contents != contents)
2932 free (contents);
2933 if (internal_relocs != NULL
2934 && elf_section_data (sec)->relocs != internal_relocs)
2935 free (internal_relocs);
2936 return FALSE;
2937}
2938
252b5132
RH		 2939/* Set the sizes of the dynamic sections. */
2940
b34976b6 2941static bfd_boolean
23209a78 2942elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
252b5132 2943{
0afcef53 2944 struct elf_x86_link_hash_table *htab;
252b5132
RH		 2945 bfd *dynobj;
2946 asection *s;
b34976b6 2947 bfd_boolean relocs;
0c715baa 2948 bfd *ibfd;
252b5132 2949
0afcef53 2950 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2951 if (htab == NULL)
2952 return FALSE;
ebe50bae 2953 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 2954 if (dynobj == NULL)
2955 abort ();
252b5132 2956
0c715baa
AM		 2957 /* Set up .got offsets for local syms, and space for local dynamic
2958 relocs. */
c72f2fb2 2959 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
161d71a6
L		 2960 {
2961 bfd_signed_vma *local_got;
2962 bfd_signed_vma *end_local_got;
13ae64f3 2963 char *local_tls_type;
67a4f2b7 2964 bfd_vma *local_tlsdesc_gotent;
161d71a6
L		 2965 bfd_size_type locsymcount;
2966 Elf_Internal_Shdr *symtab_hdr;
2967 asection *srel;
6725bdbf 2968
0ffa91dd 2969 if (! is_i386_elf (ibfd))
161d71a6 2970 continue;
6725bdbf 2971
0c715baa
AM		 2972 for (s = ibfd->sections; s != NULL; s = s->next)
2973 {
e03a8ed8 2974 struct elf_dyn_relocs *p;
0c715baa 2975
02a86693 2976 if (!elf_i386_convert_load (ibfd, s, info))
daa67607
L		 2977 return FALSE;
2978
e03a8ed8 2979 for (p = ((struct elf_dyn_relocs *)
e81d3500 2980 elf_section_data (s)->local_dynrel);
ec338859
AM		 2981 p != NULL;
2982 p = p->next)
0c715baa 2983 {
ec338859
AM		 2984 if (!bfd_is_abs_section (p->sec)
2985 && bfd_is_abs_section (p->sec->output_section))
2986 {
2987 /* Input section has been discarded, either because
2988 it is a copy of a linkonce section or due to
2989 linker script /DISCARD/, so we'll be discarding
2990 the relocs too. */
2991 }
f604c2a2
L		 2992 else if ((get_elf_i386_backend_data (output_bfd)->os
2993 == is_vxworks)
3348747a
NS		 2994 && strcmp (p->sec->output_section->name,
2995 ".tls_vars") == 0)
2996 {
2997 /* Relocations in vxworks .tls_vars sections are
2998 handled specially by the loader. */
2999 }
248866a8 3000 else if (p->count != 0)
ec338859
AM		 3001 {
3002 srel = elf_section_data (p->sec)->sreloc;
eea6121a 3003 srel->size += p->count * sizeof (Elf32_External_Rel);
4b819e1f
L		 3004 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3005 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 3006 {
3007 info->flags |= DF_TEXTREL;
0e1862bb 3008 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd 3009 || info->error_textrel)
695344c0 3010 /* xgettext:c-format */
1952c5cd 3011 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
b70321a2 3012 p->sec->owner, p->sec);
b70321a2 3013 }
ec338859 3014 }
0c715baa
AM		 3015 }
3016 }
3017
3018 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 3019 if (!local_got)
3020 continue;
6725bdbf 3021
0ffa91dd 3022 symtab_hdr = &elf_symtab_hdr (ibfd);
161d71a6
L		 3023 locsymcount = symtab_hdr->sh_info;
3024 end_local_got = local_got + locsymcount;
0afcef53
L		 3025 local_tls_type = elf_x86_local_got_tls_type (ibfd);
3026 local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 3027 s = htab->elf.sgot;
3028 srel = htab->elf.srelgot;
67a4f2b7
AO		 3029 for (; local_got < end_local_got;
3030 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
161d71a6 3031 {
67a4f2b7 3032 *local_tlsdesc_gotent = (bfd_vma) -1;
161d71a6 3033 if (*local_got > 0)
6725bdbf 3034 {
67a4f2b7
AO		 3035 if (GOT_TLS_GDESC_P (*local_tls_type))
3036 {
6de2ae4a 3037 *local_tlsdesc_gotent = htab->elf.sgotplt->size
67a4f2b7 3038 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 3039 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 3040 *local_got = (bfd_vma) -2;
3041 }
3042 if (! GOT_TLS_GDESC_P (*local_tls_type)
3043 || GOT_TLS_GD_P (*local_tls_type))
3044 {
3045 *local_got = s->size;
3046 s->size += 4;
3047 if (GOT_TLS_GD_P (*local_tls_type)
3048 || *local_tls_type == GOT_TLS_IE_BOTH)
3049 s->size += 4;
3050 }
0e1862bb 3051 if (bfd_link_pic (info)
67a4f2b7 3052 || GOT_TLS_GD_ANY_P (*local_tls_type)
37e55690
JJ		 3053 || (*local_tls_type & GOT_TLS_IE))
3054 {
3055 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 3056 srel->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 3057 else if (GOT_TLS_GD_P (*local_tls_type)
3058 || ! GOT_TLS_GDESC_P (*local_tls_type))
eea6121a 3059 srel->size += sizeof (Elf32_External_Rel);
67a4f2b7 3060 if (GOT_TLS_GDESC_P (*local_tls_type))
6de2ae4a 3061 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
37e55690 3062 }
6725bdbf 3063 }
161d71a6
L		 3064 else
3065 *local_got = (bfd_vma) -1;
6725bdbf 3066 }
252b5132 3067 }
6725bdbf 3068
0afcef53 3069 if (htab->tls_ld_or_ldm_got.refcount > 0)
13ae64f3
JJ		 3070 {
3071 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3072 relocs. */
0afcef53 3073 htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
6de2ae4a
L		 3074 htab->elf.sgot->size += 8;
3075 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 3076 }
3077 else
0afcef53 3078 htab->tls_ld_or_ldm_got.offset = -1;
13ae64f3 3079
0c715baa
AM		 3080 /* Allocate global sym .plt and .got entries, and space for global
3081 sym dynamic relocs. */
eb4ff4d6 3082 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
252b5132 3083
c25bc9fc
L		 3084 /* Allocate .plt and .got entries, and space for local symbols. */
3085 htab_traverse (htab->loc_hash_table,
3086 elf_i386_allocate_local_dynrelocs,
3087 info);
3088
67a4f2b7
AO		 3089 /* For every jump slot reserved in the sgotplt, reloc_count is
3090 incremented. However, when we reserve space for TLS descriptors,
3091 it's not incremented, so in order to compute the space reserved
3092 for them, it suffices to multiply the reloc count by the jump
e1f98742 3093 slot size.
caa0075c 3094
e1f98742
L		 3095 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3096 so that R_386_IRELATIVE entries come last. */
6de2ae4a 3097 if (htab->elf.srelplt)
e1f98742 3098 {
0afcef53
L		 3099 elf_i386_next_tls_desc_index(htab)
3100 = htab->elf.srelplt->reloc_count;
3101 htab->sgotplt_jump_table_size
3102 = elf_i386_next_tls_desc_index(htab) * 4;
e1f98742
L		 3103 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3104 }
3105 else if (htab->elf.irelplt)
3106 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3107
67a4f2b7 3108
a7b16ceb
L		 3109 if (htab->elf.sgotplt)
3110 {
3111 /* Don't allocate .got.plt section if there are no GOT nor PLT
9a2a56cc 3112 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 3113 if ((htab->elf.hgot == NULL
3114 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 3115 && (htab->elf.sgotplt->size
3116 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 3117 && (htab->elf.splt == NULL
3118 || htab->elf.splt->size == 0)
3119 && (htab->elf.sgot == NULL
3120 || htab->elf.sgot->size == 0)
3121 && (htab->elf.iplt == NULL
3122 || htab->elf.iplt->size == 0)
3123 && (htab->elf.igotplt == NULL
3124 || htab->elf.igotplt->size == 0))
3125 htab->elf.sgotplt->size = 0;
3126 }
3127
fff53dae
L		 3128 if (_bfd_elf_eh_frame_present (info))
3129 {
3130 if (htab->plt_eh_frame != NULL
3131 && htab->elf.splt != NULL
3132 && htab->elf.splt->size != 0
3133 && !bfd_is_abs_section (htab->elf.splt->output_section))
0afcef53 3134 htab->plt_eh_frame->size = elf_i386_plt (htab).eh_frame_plt_size;
fff53dae
L		 3135
3136 if (htab->plt_got_eh_frame != NULL
3137 && htab->plt_got != NULL
3138 && htab->plt_got->size != 0
3139 && !bfd_is_abs_section (htab->plt_got->output_section))
3140 htab->plt_got_eh_frame->size
0afcef53 3141 = elf_i386_non_lazy_plt (htab)->eh_frame_plt_size;
ee2fdd6f
L		 3142
3143 /* Unwind info for the second PLT and .plt.got sections are
3144 identical. */
3145 if (htab->plt_second_eh_frame != NULL
3146 && htab->plt_second != NULL
3147 && htab->plt_second->size != 0
3148 && !bfd_is_abs_section (htab->plt_second->output_section))
3149 htab->plt_second_eh_frame->size
0afcef53 3150 = elf_i386_non_lazy_plt (htab)->eh_frame_plt_size;
fff53dae 3151 }
9a2a56cc 3152
5a15f56f
AM		 3153 /* We now have determined the sizes of the various dynamic sections.
3154 Allocate memory for them. */
b34976b6 3155 relocs = FALSE;
252b5132
RH		 3156 for (s = dynobj->sections; s != NULL; s = s->next)
3157 {
eac338cf
PB		 3158 bfd_boolean strip_section = TRUE;
3159
252b5132
RH		 3160 if ((s->flags & SEC_LINKER_CREATED) == 0)
3161 continue;
3162
6de2ae4a 3163 if (s == htab->elf.splt
9a2a56cc 3164 || s == htab->elf.sgot)
252b5132 3165 {
6725bdbf
AM		 3166 /* Strip this section if we don't need it; see the
3167 comment below. */
eac338cf
PB		 3168 /* We'd like to strip these sections if they aren't needed, but if
3169 we've exported dynamic symbols from them we must leave them.
3170 It's too late to tell BFD to get rid of the symbols. */
3171
7325306f 3172 if (htab->elf.hplt != NULL)
eac338cf 3173 strip_section = FALSE;
252b5132 3174 }
9a2a56cc
AM		 3175 else if (s == htab->elf.sgotplt
3176 || s == htab->elf.iplt
3177 || s == htab->elf.igotplt
ee2fdd6f 3178 || s == htab->plt_second
dd7e64d4 3179 || s == htab->plt_got
9a2a56cc 3180 || s == htab->plt_eh_frame
fff53dae 3181 || s == htab->plt_got_eh_frame
ee2fdd6f 3182 || s == htab->plt_second_eh_frame
5474d94f
AM		 3183 || s == htab->elf.sdynbss
3184 || s == htab->elf.sdynrelro)
9a2a56cc
AM		 3185 {
3186 /* Strip these too. */
3187 }
0112cd26 3188 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
252b5132 3189 {
6de2ae4a
L		 3190 if (s->size != 0
3191 && s != htab->elf.srelplt
0afcef53 3192 && s != elf_i386_srelplt2 (htab))
b34976b6 3193 relocs = TRUE;
252b5132 3194
0ac8d2ca
AM		 3195 /* We use the reloc_count field as a counter if we need
3196 to copy relocs into the output file. */
5ae0bfb6 3197 s->reloc_count = 0;
252b5132 3198 }
6725bdbf 3199 else
252b5132
RH		 3200 {
3201 /* It's not one of our sections, so don't allocate space. */
3202 continue;
3203 }
3204
c456f082 3205 if (s->size == 0)
252b5132 3206 {
0ac8d2ca
AM		 3207 /* If we don't need this section, strip it from the
3208 output file. This is mostly to handle .rel.bss and
3209 .rel.plt. We must create both sections in
3210 create_dynamic_sections, because they must be created
3211 before the linker maps input sections to output
3212 sections. The linker does that before
3213 adjust_dynamic_symbol is called, and it is that
3214 function which decides whether anything needs to go
3215 into these sections. */
c456f082
AM		 3216 if (strip_section)
3217 s->flags |= SEC_EXCLUDE;
252b5132
RH		 3218 continue;
3219 }
3220
c456f082
AM		 3221 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3222 continue;
3223
f69da49f
AM		 3224 /* Allocate memory for the section contents. We use bfd_zalloc
3225 here in case unused entries are not reclaimed before the
3226 section's contents are written out. This should not happen,
3227 but this way if it does, we get a R_386_NONE reloc instead
3228 of garbage. */
a50b1753 3229 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
6725bdbf 3230 if (s->contents == NULL)
b34976b6 3231 return FALSE;
252b5132
RH		 3232 }
3233
e41b3a13 3234 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 3235 && htab->plt_eh_frame->contents != NULL)
3236 {
f129e49f 3237 memcpy (htab->plt_eh_frame->contents,
0afcef53 3238 elf_i386_plt (htab).eh_frame_plt,
f129e49f 3239 htab->plt_eh_frame->size);
9a2a56cc
AM		 3240 bfd_put_32 (dynobj, htab->elf.splt->size,
3241 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3242 }
e41b3a13 3243
fff53dae
L		 3244 if (htab->plt_got_eh_frame != NULL
3245 && htab->plt_got_eh_frame->contents != NULL)
3246 {
3247 memcpy (htab->plt_got_eh_frame->contents,
0afcef53 3248 elf_i386_non_lazy_plt (htab)->eh_frame_plt,
fff53dae
L		 3249 htab->plt_got_eh_frame->size);
3250 bfd_put_32 (dynobj, htab->plt_got->size,
3251 (htab->plt_got_eh_frame->contents
3252 + PLT_FDE_LEN_OFFSET));
3253 }
3254
ee2fdd6f
L		 3255 if (htab->plt_second_eh_frame != NULL
3256 && htab->plt_second_eh_frame->contents != NULL)
3257 {
3258 memcpy (htab->plt_second_eh_frame->contents,
0afcef53 3259 elf_i386_non_lazy_plt (htab)->eh_frame_plt,
ee2fdd6f
L		 3260 htab->plt_second_eh_frame->size);
3261 bfd_put_32 (dynobj, htab->plt_second->size,
3262 (htab->plt_second_eh_frame->contents
3263 + PLT_FDE_LEN_OFFSET));
3264 }
3265
ebe50bae 3266 if (htab->elf.dynamic_sections_created)
252b5132
RH		 3267 {
3268 /* Add some entries to the .dynamic section. We fill in the
3269 values later, in elf_i386_finish_dynamic_sections, but we
3270 must add the entries now so that we get the correct size for
3271 the .dynamic section. The DT_DEBUG entry is filled in by the
3272 dynamic linker and used by the debugger. */
dc810e39 3273#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3274 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3275
0e1862bb 3276 if (bfd_link_executable (info))
252b5132 3277 {
dc810e39 3278 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3279 return FALSE;
252b5132
RH		 3280 }
3281
6de2ae4a 3282 if (htab->elf.splt->size != 0)
252b5132 3283 {
7c1e8d3e
L		 3284 /* DT_PLTGOT is used by prelink even if there is no PLT
3285 relocation. */
3286 if (!add_dynamic_entry (DT_PLTGOT, 0))
b34976b6 3287 return FALSE;
97d343d4 3288 }
7c1e8d3e 3289
97d343d4
L		 3290 if (htab->elf.srelplt->size != 0)
3291 {
3292 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3293 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3294 || !add_dynamic_entry (DT_JMPREL, 0))
3295 return FALSE;
252b5132
RH		 3296 }
3297
3298 if (relocs)
3299 {
dc810e39
AM		 3300 if (!add_dynamic_entry (DT_REL, 0)
3301 || !add_dynamic_entry (DT_RELSZ, 0)
3302 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 3303 return FALSE;
252b5132 3304
0c715baa
AM		 3305 /* If any dynamic relocs apply to a read-only section,
3306 then we need a DT_TEXTREL entry. */
248866a8 3307 if ((info->flags & DF_TEXTREL) == 0)
eb4ff4d6 3308 elf_link_hash_traverse (&htab->elf,
0afcef53
L		 3309 _bfd_x86_elf_readonly_dynrelocs,
3310 info);
0c715baa
AM		 3311
3312 if ((info->flags & DF_TEXTREL) != 0)
3313 {
2df3368d 3314 if (htab->readonly_dynrelocs_against_ifunc)
8efa2874
L		 3315 {
3316 info->callbacks->einfo
3317 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3318 bfd_set_error (bfd_error_bad_value);
3319 return FALSE;
3320 }
3321
0c715baa 3322 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3323 return FALSE;
0c715baa 3324 }
252b5132 3325 }
f604c2a2 3326 if (get_elf_i386_backend_data (output_bfd)->os == is_vxworks
7a2b07ff
NS		 3327 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3328 return FALSE;
252b5132 3329 }
dc810e39 3330#undef add_dynamic_entry
252b5132 3331
b34976b6 3332 return TRUE;
252b5132
RH		 3333}
3334
38701953
AM		 3335/* Set the correct type for an x86 ELF section. We do this by the
3336 section name, which is a hack, but ought to work. */
3337
b34976b6 3338static bfd_boolean
55fd94b0
AM		 3339elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3340 Elf_Internal_Shdr *hdr,
3341 asection *sec)
38701953 3342{
91d6fa6a 3343 const char *name;
38701953
AM		 3344
3345 name = bfd_get_section_name (abfd, sec);
3346
3347 /* This is an ugly, but unfortunately necessary hack that is
3348 needed when producing EFI binaries on x86. It tells
3349 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3350 containing ELF relocation info. We need this hack in order to
3351 be able to generate ELF binaries that can be translated into
3352 EFI applications (which are essentially COFF objects). Those
3353 files contain a COFF ".reloc" section inside an ELFNN object,
3354 which would normally cause BFD to segfault because it would
3355 attempt to interpret this section as containing relocation
3356 entries for section "oc". With this hack enabled, ".reloc"
3357 will be treated as a normal data section, which will avoid the
3358 segfault. However, you won't be able to create an ELFNN binary
3359 with a section named "oc" that needs relocations, but that's
3360 the kind of ugly side-effects you get when detecting section
3361 types based on their names... In practice, this limitation is
3362 unlikely to bite. */
3363 if (strcmp (name, ".reloc") == 0)
3364 hdr->sh_type = SHT_PROGBITS;
3365
b34976b6 3366 return TRUE;
38701953
AM		 3367}
3368
13ae64f3
JJ		 3369/* Return the relocation value for @tpoff relocation
3370 if STT_TLS virtual address is ADDRESS. */
3371
3372static bfd_vma
eb4ff4d6 3373elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 3374{
e1918d23 3375 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3376 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3377 bfd_vma static_tls_size;
13ae64f3 3378
e1918d23
AM		 3379 /* If tls_sec is NULL, we should have signalled an error already. */
3380 if (htab->tls_sec == NULL)
6a30718d 3381 return 0;
7dc98aea
RO		 3382
3383 /* Consider special static TLS alignment requirements. */
3384 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3385 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 3386}
3387
252b5132
RH		 3388/* Relocate an i386 ELF section. */
3389
b34976b6 3390static bfd_boolean
55fd94b0
AM		 3391elf_i386_relocate_section (bfd *output_bfd,
3392 struct bfd_link_info *info,
3393 bfd *input_bfd,
3394 asection *input_section,
3395 bfd_byte *contents,
3396 Elf_Internal_Rela *relocs,
3397 Elf_Internal_Sym *local_syms,
3398 asection **local_sections)
252b5132 3399{
0afcef53 3400 struct elf_x86_link_hash_table *htab;
252b5132
RH		 3401 Elf_Internal_Shdr *symtab_hdr;
3402 struct elf_link_hash_entry **sym_hashes;
3403 bfd_vma *local_got_offsets;
67a4f2b7 3404 bfd_vma *local_tlsdesc_gotents;
252b5132 3405 Elf_Internal_Rela *rel;
60f2e42e 3406 Elf_Internal_Rela *wrel;
252b5132 3407 Elf_Internal_Rela *relend;
3348747a 3408 bfd_boolean is_vxworks_tls;
25e762b9 3409 unsigned plt_entry_size;
252b5132 3410
0ffa91dd 3411 BFD_ASSERT (is_i386_elf (input_bfd));
6bbec505 3412
c337a162
L		 3413 /* Skip if check_relocs failed. */
3414 if (input_section->check_relocs_failed)
3415 return FALSE;
3416
0afcef53 3417 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 3418 if (htab == NULL)
3419 return FALSE;
0ffa91dd 3420 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 3421 sym_hashes = elf_sym_hashes (input_bfd);
3422 local_got_offsets = elf_local_got_offsets (input_bfd);
0afcef53 3423 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 3424 /* We have to handle relocations in vxworks .tls_vars sections
3425 specially, because the dynamic loader is 'weird'. */
f604c2a2
L		 3426 is_vxworks_tls = ((get_elf_i386_backend_data (output_bfd)->os
3427 == is_vxworks)
0e1862bb 3428 && bfd_link_pic (info)
3348747a
NS		 3429 && !strcmp (input_section->output_section->name,
3430 ".tls_vars"));
252b5132 3431
0afcef53 3432 _bfd_x86_elf_set_tls_module_base (info);
9f03412a 3433
0afcef53 3434 plt_entry_size = elf_i386_plt (htab).plt_entry_size;
25e762b9 3435
60f2e42e 3436 rel = wrel = relocs;
252b5132 3437 relend = relocs + input_section->reloc_count;
60f2e42e 3438 for (; rel < relend; wrel++, rel++)
252b5132 3439 {
13ae64f3 3440 unsigned int r_type;
252b5132
RH		 3441 reloc_howto_type *howto;
3442 unsigned long r_symndx;
3443 struct elf_link_hash_entry *h;
0afcef53 3444 struct elf_x86_link_hash_entry *eh;
252b5132
RH		 3445 Elf_Internal_Sym *sym;
3446 asection *sec;
dd7e64d4 3447 bfd_vma off, offplt, plt_offset;
252b5132 3448 bfd_vma relocation;
b34976b6 3449 bfd_boolean unresolved_reloc;
252b5132 3450 bfd_reloc_status_type r;
1b452ec6 3451 unsigned int indx;
13ae64f3 3452 int tls_type;
1788fc08 3453 bfd_vma st_size;
dd7e64d4 3454 asection *resolved_plt;
aec6b87e 3455 bfd_boolean resolved_to_zero;
e133d005 3456 bfd_boolean relative_reloc;
252b5132
RH		 3457
3458 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 3459 if (r_type == R_386_GNU_VTINHERIT
3460 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 3461 {
3462 if (wrel != rel)
3463 *wrel = *rel;
3464 continue;
3465 }
dc47f327 3466
55fd94b0 3467 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 3468 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3469 >= R_386_ext - R_386_standard)
3470 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520 3471 >= R_386_ext2 - R_386_ext))
47aeb64c
NC		 3472 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
3473
1b452ec6 3474 howto = elf_howto_table + indx;
252b5132
RH		 3475
3476 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 3477 h = NULL;
3478 sym = NULL;
3479 sec = NULL;
b34976b6 3480 unresolved_reloc = FALSE;
252b5132
RH		 3481 if (r_symndx < symtab_hdr->sh_info)
3482 {
3483 sym = local_syms + r_symndx;
3484 sec = local_sections[r_symndx];
3485 relocation = (sec->output_section->vma
3486 + sec->output_offset
3487 + sym->st_value);
1788fc08 3488 st_size = sym->st_size;
ab96bf03
AM		 3489
3490 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3491 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 3492 || (bfd_link_relocatable (info)
ab96bf03 3493 && sec->output_offset != 0)))
f8df10f4 3494 {
f8df10f4 3495 bfd_vma addend;
4a335f3d 3496 bfd_byte *where = contents + rel->r_offset;
f8df10f4 3497
4a335f3d 3498 switch (howto->size)
f8df10f4 3499 {
4a335f3d
AM		 3500 case 0:
3501 addend = bfd_get_8 (input_bfd, where);
3502 if (howto->pc_relative)
3503 {
3504 addend = (addend ^ 0x80) - 0x80;
3505 addend += 1;
3506 }
3507 break;
3508 case 1:
3509 addend = bfd_get_16 (input_bfd, where);
3510 if (howto->pc_relative)
3511 {
3512 addend = (addend ^ 0x8000) - 0x8000;
3513 addend += 2;
3514 }
3515 break;
3516 case 2:
3517 addend = bfd_get_32 (input_bfd, where);
3518 if (howto->pc_relative)
3519 {
3520 addend = (addend ^ 0x80000000) - 0x80000000;
3521 addend += 4;
3522 }
3523 break;
3524 default:
3525 abort ();
f8df10f4
JJ		 3526 }
3527
0e1862bb 3528 if (bfd_link_relocatable (info))
ab96bf03
AM		 3529 addend += sec->output_offset;
3530 else
3531 {
3532 asection *msec = sec;
3533 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3534 addend);
3535 addend -= relocation;
3536 addend += msec->output_section->vma + msec->output_offset;
3537 }
4a335f3d
AM		 3538
3539 switch (howto->size)
3540 {
3541 case 0:
16a10388 3542 /* FIXME: overflow checks. */
4a335f3d
AM		 3543 if (howto->pc_relative)
3544 addend -= 1;
3545 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 3546 break;
3547 case 1:
3548 if (howto->pc_relative)
3549 addend -= 2;
3550 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 3551 break;
3552 case 2:
3553 if (howto->pc_relative)
3554 addend -= 4;
3555 bfd_put_32 (input_bfd, addend, where);
3556 break;
3557 }
f8df10f4 3558 }
0e1862bb 3559 else if (!bfd_link_relocatable (info)
1f85278f 3560 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 3561 {
3562 /* Relocate against local STT_GNU_IFUNC symbol. */
0afcef53
L		 3563 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
3564 FALSE);
c25bc9fc
L		 3565 if (h == NULL)
3566 abort ();
3567
23209a78 3568 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3569 h->root.u.def.value = sym->st_value;
3570 h->root.u.def.section = sec;
3571 }
252b5132
RH		 3572 }
3573 else
3574 {
3d540e93 3575 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 3576 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 3577
b2a8e766
AM		 3578 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3579 r_symndx, symtab_hdr, sym_hashes,
3580 h, sec, relocation,
62d887d4 3581 unresolved_reloc, warned, ignored);
1788fc08 3582 st_size = h->size;
252b5132
RH		 3583 }
3584
dbaa2011 3585 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 3586 {
3587 _bfd_clear_contents (howto, input_bfd, input_section,
3588 contents + rel->r_offset);
3589 wrel->r_offset = rel->r_offset;
3590 wrel->r_info = 0;
3591 wrel->r_addend = 0;
3592
3593 /* For ld -r, remove relocations in debug sections against
3594 sections defined in discarded sections. Not done for
3595 eh_frame editing code expects to be present. */
3596 if (bfd_link_relocatable (info)
3597 && (input_section->flags & SEC_DEBUGGING))
3598 wrel--;
3599
3600 continue;
3601 }
9635fe29 3602
0e1862bb 3603 if (bfd_link_relocatable (info))
2d5da473
L		 3604 {
3605 if (wrel != rel)
3606 *wrel = *rel;
3607 continue;
3608 }
ab96bf03 3609
0afcef53 3610 eh = (struct elf_x86_link_hash_entry *) h;
ee2fdd6f 3611
cbe950e9
L		 3612 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3613 it here if it is defined in a non-shared object. */
3614 if (h != NULL
3615 && h->type == STT_GNU_IFUNC
3616 && h->def_regular)
3617 {
ee2fdd6f 3618 asection *gotplt, *base_got;
cbe950e9 3619 bfd_vma plt_index;
4c544807 3620 const char *name;
cbe950e9 3621
97dc35c8
L		 3622 if ((input_section->flags & SEC_ALLOC) == 0)
3623 {
3624 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3625 sections because such sections are not SEC_ALLOC and
3626 thus ld.so will not process them. */
3627 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 3628 continue;
97dc35c8
L		 3629 abort ();
3630 }
cbe950e9
L		 3631
3632 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3633 if (htab->elf.splt != NULL)
cbe950e9 3634 {
ee2fdd6f
L		 3635 if (htab->plt_second != NULL)
3636 {
3637 resolved_plt = htab->plt_second;
3638 plt_offset = eh->plt_second.offset;
3639 }
3640 else
3641 {
3642 resolved_plt = htab->elf.splt;
3643 plt_offset = h->plt.offset;
3644 }
6de2ae4a 3645 gotplt = htab->elf.sgotplt;
cbe950e9
L		 3646 }
3647 else
3648 {
ee2fdd6f
L		 3649 resolved_plt = htab->elf.iplt;
3650 plt_offset = h->plt.offset;
6de2ae4a 3651 gotplt = htab->elf.igotplt;
cbe950e9
L		 3652 }
3653
cbe950e9
L		 3654 switch (r_type)
3655 {
3656 default:
233cc9c1 3657 break;
cbe950e9
L		 3658
3659 case R_386_GOT32:
02a86693 3660 case R_386_GOT32X:
6de2ae4a 3661 base_got = htab->elf.sgot;
cbe950e9
L		 3662 off = h->got.offset;
3663
7afd84dc 3664 if (base_got == NULL)
cbe950e9
L		 3665 abort ();
3666
7afd84dc 3667 if (off == (bfd_vma) -1)
cbe950e9 3668 {
7afd84dc
L		 3669 /* We can't use h->got.offset here to save state, or
3670 even just remember the offset, as finish_dynamic_symbol
3671 would use that as offset into .got. */
6bbec505 3672
233cc9c1
L		 3673 if (h->plt.offset == (bfd_vma) -1)
3674 abort ();
3675
6de2ae4a 3676 if (htab->elf.splt != NULL)
7afd84dc 3677 {
f604c2a2 3678 plt_index = (h->plt.offset / plt_entry_size
0afcef53 3679 - elf_i386_plt (htab).has_plt0);
7afd84dc 3680 off = (plt_index + 3) * 4;
6de2ae4a 3681 base_got = htab->elf.sgotplt;
7afd84dc 3682 }
cbe950e9
L		 3683 else
3684 {
25e762b9 3685 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3686 off = plt_index * 4;
6de2ae4a 3687 base_got = htab->elf.igotplt;
7afd84dc
L		 3688 }
3689
3690 if (h->dynindx == -1
3691 || h->forced_local
3692 || info->symbolic)
3693 {
3694 /* This references the local defitionion. We must
3695 initialize this entry in the global offset table.
3696 Since the offset must always be a multiple of 8,
3697 we use the least significant bit to record
3698 whether we have initialized it already.
3699
3700 When doing a dynamic link, we create a .rela.got
3701 relocation entry to initialize the value. This
3702 is done in the finish_dynamic_symbol routine. */
3703 if ((off & 1) != 0)
3704 off &= ~1;
3705 else
3706 {
3707 bfd_put_32 (output_bfd, relocation,
3708 base_got->contents + off);
3709 h->got.offset |= 1;
3710 }
cbe950e9 3711 }
cbe950e9 3712
7afd84dc 3713 relocation = off;
7afd84dc
L		 3714 }
3715 else
ca8c86ef
L		 3716 relocation = (base_got->output_section->vma
3717 + base_got->output_offset + off
3718 - gotplt->output_section->vma
3719 - gotplt->output_offset);
3720
2a568401
L		 3721 if (rel->r_offset > 1
3722 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3723 && *(contents + rel->r_offset - 2) != 0x8d)
712ec279
L		 3724 {
3725 if (bfd_link_pic (info))
3726 goto disallow_got32;
3727
3728 /* Add the GOT base if there is no base register. */
3729 relocation += (gotplt->output_section->vma
3730 + gotplt->output_offset);
3731 }
3732 else if (htab->elf.splt == NULL)
3733 {
3734 /* Adjust for static executables. */
3735 relocation += gotplt->output_offset;
3736 }
0018b0a3 3737
cbe950e9 3738 goto do_relocation;
233cc9c1
L		 3739 }
3740
3741 if (h->plt.offset == (bfd_vma) -1)
3742 {
3743 /* Handle static pointers of STT_GNU_IFUNC symbols. */
3744 if (r_type == R_386_32
3745 && (input_section->flags & SEC_CODE) == 0)
3746 goto do_ifunc_pointer;
3747 goto bad_ifunc_reloc;
3748 }
3749
ee2fdd6f
L		 3750 relocation = (resolved_plt->output_section->vma
3751 + resolved_plt->output_offset + plt_offset);
233cc9c1
L		 3752
3753 switch (r_type)
3754 {
3755 default:
3756bad_ifunc_reloc:
3757 if (h->root.root.string)
3758 name = h->root.root.string;
3759 else
3760 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3761 NULL);
4eca0228 3762 _bfd_error_handler
695344c0 3763 /* xgettext:c-format */
233cc9c1
L		 3764 (_("%B: relocation %s against STT_GNU_IFUNC "
3765 "symbol `%s' isn't supported"), input_bfd,
3766 howto->name, name);
3767 bfd_set_error (bfd_error_bad_value);
3768 return FALSE;
3769
3770 case R_386_32:
3771 /* Generate dynamic relcoation only when there is a
3772 non-GOT reference in a shared object. */
3773 if ((bfd_link_pic (info) && h->non_got_ref)
3774 || h->plt.offset == (bfd_vma) -1)
3775 {
3776 Elf_Internal_Rela outrel;
3777 asection *sreloc;
3778 bfd_vma offset;
3779
3780do_ifunc_pointer:
3781 /* Need a dynamic relocation to get the real function
3782 adddress. */
3783 offset = _bfd_elf_section_offset (output_bfd,
3784 info,
3785 input_section,
3786 rel->r_offset);
3787 if (offset == (bfd_vma) -1
3788 || offset == (bfd_vma) -2)
3789 abort ();
3790
3791 outrel.r_offset = (input_section->output_section->vma
3792 + input_section->output_offset
3793 + offset);
3794
3795 if (h->dynindx == -1
3796 || h->forced_local
3797 || bfd_link_executable (info))
3798 {
6322e5c5
L		 3799 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3800 h->root.root.string,
3801 h->root.u.def.section->owner);
3802
233cc9c1
L		 3803 /* This symbol is resolved locally. */
3804 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3805 bfd_put_32 (output_bfd,
3806 (h->root.u.def.value
3807 + h->root.u.def.section->output_section->vma
3808 + h->root.u.def.section->output_offset),
3809 contents + offset);
3810 }
3811 else
3812 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3813
3814 /* Dynamic relocations are stored in
3815 1. .rel.ifunc section in PIC object.
3816 2. .rel.got section in dynamic executable.
3817 3. .rel.iplt section in static executable. */
3818 if (bfd_link_pic (info))
3819 sreloc = htab->elf.irelifunc;
3820 else if (htab->elf.splt != NULL)
3821 sreloc = htab->elf.srelgot;
3822 else
3823 sreloc = htab->elf.irelplt;
3824 elf_append_rel (output_bfd, sreloc, &outrel);
3825
3826 /* If this reloc is against an external symbol, we
3827 do not want to fiddle with the addend. Otherwise,
3828 we need to include the symbol value so that it
3829 becomes an addend for the dynamic reloc. For an
3830 internal symbol, we have updated addend. */
3831 continue;
3832 }
3833 /* FALLTHROUGH */
3834 case R_386_PC32:
3835 case R_386_PLT32:
3836 goto do_relocation;
cbe950e9
L		 3837
3838 case R_386_GOTOFF:
3839 relocation -= (gotplt->output_section->vma
3840 + gotplt->output_offset);
3841 goto do_relocation;
3842 }
3843 }
3844
aec6b87e 3845 resolved_to_zero = (eh != NULL
e62b9723 3846 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
0afcef53 3847 I386_ELF_DATA,
e62b9723
L		 3848 eh->has_got_reloc,
3849 eh));
aec6b87e 3850
252b5132
RH		 3851 switch (r_type)
3852 {
02a86693
L		 3853 case R_386_GOT32X:
3854 /* Avoid optimizing _DYNAMIC since ld.so may use its
3855 link-time address. */
3856 if (h == htab->elf.hdynamic)
3857 goto r_386_got32;
3858
3859 if (bfd_link_pic (info))
3860 {
3861 /* It is OK to convert mov to lea and convert indirect
3862 branch to direct branch. It is OK to convert adc,
3863 add, and, cmp, or, sbb, sub, test, xor only when PIC
3864 is false. */
02e2aef8
L		 3865 unsigned int opcode, addend;
3866 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3867 if (addend != 0)
3868 goto r_386_got32;
3869 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
02a86693
L		 3870 if (opcode != 0x8b && opcode != 0xff)
3871 goto r_386_got32;
3872 }
3873
3874 /* Resolve "mov GOT[(%reg)], %reg",
3875 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
3876 and "binop foo@GOT[(%reg)], %reg". */
3877 if (h == NULL
3878 || (h->plt.offset == (bfd_vma) -1
3879 && h->got.offset == (bfd_vma) -1)
3880 || htab->elf.sgotplt == NULL)
3881 abort ();
3882
3883 offplt = (htab->elf.sgotplt->output_section->vma
3884 + htab->elf.sgotplt->output_offset);
3885
3886 /* It is relative to .got.plt section. */
3887 if (h->got.offset != (bfd_vma) -1)
32875eb1
L		 3888 /* Use GOT entry. Mask off the least significant bit in
3889 GOT offset which may be set by R_386_GOT32 processing
3890 below. */
02a86693
L		 3891 relocation = (htab->elf.sgot->output_section->vma
3892 + htab->elf.sgot->output_offset
32875eb1 3893 + (h->got.offset & ~1) - offplt);
02a86693
L		 3894 else
3895 /* Use GOTPLT entry. */
f604c2a2 3896 relocation = (h->plt.offset / plt_entry_size
0afcef53 3897 - elf_i386_plt (htab).has_plt0 + 3) * 4;
02a86693
L		 3898
3899 if (!bfd_link_pic (info))
3900 {
3901 /* If not PIC, add the .got.plt section address for
a3718e9e 3902 baseless addressing. */
02a86693 3903 unsigned int modrm;
02e2aef8 3904 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
02a86693
L		 3905 if ((modrm & 0xc7) == 0x5)
3906 relocation += offplt;
3907 }
3908
3909 unresolved_reloc = FALSE;
3910 break;
3911
252b5132 3912 case R_386_GOT32:
02a86693 3913r_386_got32:
252b5132
RH		 3914 /* Relocation is to the entry for this symbol in the global
3915 offset table. */
6de2ae4a 3916 if (htab->elf.sgot == NULL)
ffb2e45b 3917 abort ();
252b5132 3918
e133d005 3919 relative_reloc = FALSE;
252b5132
RH		 3920 if (h != NULL)
3921 {
b34976b6 3922 bfd_boolean dyn;
252b5132
RH		 3923
3924 off = h->got.offset;
ebe50bae 3925 dyn = htab->elf.dynamic_sections_created;
0e1862bb
L		 3926 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3927 bfd_link_pic (info),
3928 h)
3929 || (bfd_link_pic (info)
586119b3 3930 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 3931 || (ELF_ST_VISIBILITY (h->other)
3932 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 3933 {
3934 /* This is actually a static link, or it is a
3935 -Bsymbolic link and the symbol is defined
3936 locally, or the symbol was forced to be local
3937 because of a version file. We must initialize
3938 this entry in the global offset table. Since the
3939 offset must always be a multiple of 4, we use the
3940 least significant bit to record whether we have
3941 initialized it already.
3942
3943 When doing a dynamic link, we create a .rel.got
3944 relocation entry to initialize the value. This
3945 is done in the finish_dynamic_symbol routine. */
3946 if ((off & 1) != 0)
3947 off &= ~1;
3948 else
3949 {
3950 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3951 htab->elf.sgot->contents + off);
252b5132 3952 h->got.offset |= 1;
e133d005
L		 3953
3954 if (h->dynindx == -1
3955 && !h->forced_local
3956 && h->root.type != bfd_link_hash_undefweak
0dc9a308 3957 && bfd_link_pic (info))
e133d005
L		 3958 {
3959 /* PR ld/21402: If this symbol isn't dynamic
0dc9a308 3960 in PIC, generate R_386_RELATIVE here. */
e133d005
L		 3961 eh->no_finish_dynamic_symbol = 1;
3962 relative_reloc = TRUE;
3963 }
252b5132
RH		 3964 }
3965 }
8c694914 3966 else
b34976b6 3967 unresolved_reloc = FALSE;
252b5132
RH		 3968 }
3969 else
3970 {
ffb2e45b
AM		 3971 if (local_got_offsets == NULL)
3972 abort ();
252b5132
RH		 3973
3974 off = local_got_offsets[r_symndx];
3975
3976 /* The offset must always be a multiple of 4. We use
83be169b
AM		 3977 the least significant bit to record whether we have
3978 already generated the necessary reloc. */
252b5132
RH		 3979 if ((off & 1) != 0)
3980 off &= ~1;
3981 else
3982 {
6725bdbf 3983 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3984 htab->elf.sgot->contents + off);
e133d005 3985 local_got_offsets[r_symndx] |= 1;
252b5132 3986
0e1862bb 3987 if (bfd_link_pic (info))
e133d005 3988 relative_reloc = TRUE;
252b5132 3989 }
252b5132
RH		 3990 }
3991
e133d005
L		 3992 if (relative_reloc)
3993 {
3994 asection *s;
3995 Elf_Internal_Rela outrel;
3996
3997 s = htab->elf.srelgot;
3998 if (s == NULL)
3999 abort ();
4000
4001 outrel.r_offset = (htab->elf.sgot->output_section->vma
4002 + htab->elf.sgot->output_offset
4003 + off);
4004 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4005 elf_append_rel (output_bfd, s, &outrel);
4006 }
4007
ffb2e45b
AM		 4008 if (off >= (bfd_vma) -2)
4009 abort ();
4010
74d7f0aa
L		 4011 relocation = (htab->elf.sgot->output_section->vma
4012 + htab->elf.sgot->output_offset + off);
2a568401
L		 4013 if (rel->r_offset > 1
4014 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
4015 && *(contents + rel->r_offset - 2) != 0x8d)
74d7f0aa
L		 4016 {
4017 if (bfd_link_pic (info))
4018 {
4019 /* For PIC, disallow R_386_GOT32 without a base
2a568401
L		 4020 register, except for "lea foo@GOT, %reg", since
4021 we don't know what the GOT base is. */
74d7f0aa
L		 4022 const char *name;
4023
712ec279 4024disallow_got32:
a5def14f 4025 if (h == NULL || h->root.root.string == NULL)
74d7f0aa
L		 4026 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4027 NULL);
4028 else
4029 name = h->root.root.string;
4030
4eca0228 4031 _bfd_error_handler
695344c0 4032 /* xgettext:c-format */
63a5468a
AM		 4033 (_("%B: direct GOT relocation %s against `%s'"
4034 " without base register can not be used"
4035 " when making a shared object"),
712ec279 4036 input_bfd, howto->name, name);
74d7f0aa
L		 4037 bfd_set_error (bfd_error_bad_value);
4038 return FALSE;
4039 }
4040 }
4041 else
4042 {
4043 /* Subtract the .got.plt section address only with a base
4044 register. */
4045 relocation -= (htab->elf.sgotplt->output_section->vma
4046 + htab->elf.sgotplt->output_offset);
4047 }
4048
252b5132
RH		 4049 break;
4050
4051 case R_386_GOTOFF:
4052 /* Relocation is relative to the start of the global offset
4053 table. */
4054
3d949995
L		 4055 /* Check to make sure it isn't a protected function or data
4056 symbol for shared library since it may not be local when
4057 used as function address or with copy relocation. We also
e3c0e327 4058 need to make sure that a symbol is referenced locally. */
0e1862bb 4059 if (!bfd_link_executable (info) && h)
90f487df 4060 {
41bed6dd
L		 4061 if (!h->def_regular)
4062 {
4063 const char *v;
4064
4065 switch (ELF_ST_VISIBILITY (h->other))
4066 {
4067 case STV_HIDDEN:
4068 v = _("hidden symbol");
4069 break;
4070 case STV_INTERNAL:
4071 v = _("internal symbol");
4072 break;
4073 case STV_PROTECTED:
4074 v = _("protected symbol");
4075 break;
4076 default:
4077 v = _("symbol");
4078 break;
4079 }
4080
4eca0228 4081 _bfd_error_handler
695344c0 4082 /* xgettext:c-format */
63a5468a
AM		 4083 (_("%B: relocation R_386_GOTOFF against undefined %s"
4084 " `%s' can not be used when making a shared object"),
41bed6dd
L		 4085 input_bfd, v, h->root.root.string);
4086 bfd_set_error (bfd_error_bad_value);
4087 return FALSE;
4088 }
d5597ebc 4089 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3d949995
L		 4090 && (h->type == STT_FUNC
4091 || h->type == STT_OBJECT)
41bed6dd
L		 4092 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4093 {
4eca0228 4094 _bfd_error_handler
695344c0 4095 /* xgettext:c-format */
63a5468a
AM		 4096 (_("%B: relocation R_386_GOTOFF against protected %s"
4097 " `%s' can not be used when making a shared object"),
3d949995
L		 4098 input_bfd,
4099 h->type == STT_FUNC ? "function" : "data",
4100 h->root.root.string);
41bed6dd
L		 4101 bfd_set_error (bfd_error_bad_value);
4102 return FALSE;
4103 }
90f487df
L		 4104 }
4105
8c37241b
JJ		 4106 /* Note that sgot is not involved in this
4107 calculation. We always want the start of .got.plt. If we
4108 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 4109 permitted by the ABI, we might have to change this
4110 calculation. */
6de2ae4a
L		 4111 relocation -= htab->elf.sgotplt->output_section->vma
4112 + htab->elf.sgotplt->output_offset;
252b5132
RH		 4113 break;
4114
4115 case R_386_GOTPC:
4116 /* Use global offset table as symbol value. */
6de2ae4a
L		 4117 relocation = htab->elf.sgotplt->output_section->vma
4118 + htab->elf.sgotplt->output_offset;
b34976b6 4119 unresolved_reloc = FALSE;
252b5132
RH		 4120 break;
4121
4122 case R_386_PLT32:
4123 /* Relocation is to the entry for this symbol in the
4124 procedure linkage table. */
4125
dd5724d5 4126 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 4127 without using the procedure linkage table. */
252b5132
RH		 4128 if (h == NULL)
4129 break;
4130
dd7e64d4
L		 4131 if ((h->plt.offset == (bfd_vma) -1
4132 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 4133 || htab->elf.splt == NULL)
252b5132
RH		 4134 {
4135 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 4136 happens when statically linking PIC code, or when
4137 using -Bsymbolic. */
252b5132
RH		 4138 break;
4139 }
4140
dd7e64d4
L		 4141 if (h->plt.offset != (bfd_vma) -1)
4142 {
ee2fdd6f
L		 4143 if (htab->plt_second != NULL)
4144 {
4145 resolved_plt = htab->plt_second;
4146 plt_offset = eh->plt_second.offset;
4147 }
4148 else
4149 {
4150 resolved_plt = htab->elf.splt;
4151 plt_offset = h->plt.offset;
4152 }
dd7e64d4
L		 4153 }
4154 else
4155 {
4156 resolved_plt = htab->plt_got;
4157 plt_offset = eh->plt_got.offset;
4158 }
4159
4160 relocation = (resolved_plt->output_section->vma
4161 + resolved_plt->output_offset
4162 + plt_offset);
b34976b6 4163 unresolved_reloc = FALSE;
252b5132
RH		 4164 break;
4165
1788fc08 4166 case R_386_SIZE32:
1788fc08
L		 4167 /* Set to symbol size. */
4168 relocation = st_size;
4169 /* Fall through. */
4170
252b5132
RH		 4171 case R_386_32:
4172 case R_386_PC32:
3348747a
NS		 4173 if ((input_section->flags & SEC_ALLOC) == 0
4174 || is_vxworks_tls)
ec338859
AM		 4175 break;
4176
aec6b87e
L		 4177 /* Copy dynamic function pointer relocations. Don't generate
4178 dynamic relocations against resolved undefined weak symbols
4179 in PIE, except for R_386_PC32. */
0e1862bb 4180 if ((bfd_link_pic (info)
ef5aade5 4181 && (h == NULL
aec6b87e
L		 4182 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4183 && (!resolved_to_zero
4184 || r_type == R_386_PC32))
4185 || h->root.type != bfd_link_hash_undefweak))
1788fc08 4186 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
f6c52c13 4187 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845 4188 || (ELIMINATE_COPY_RELOCS
0e1862bb 4189 && !bfd_link_pic (info)
12d0ee4a
AM		 4190 && h != NULL
4191 && h->dynindx != -1
aec6b87e
L		 4192 && (!h->non_got_ref
4193 || eh->func_pointer_refcount > 0
4194 || (h->root.type == bfd_link_hash_undefweak
4195 && !resolved_to_zero))
bae420ef
L		 4196 && ((h->def_dynamic && !h->def_regular)
4197 /* Undefined weak symbol is bound locally when
4198 PIC is false. */
4199 || h->root.type == bfd_link_hash_undefweak)))
252b5132 4200 {
947216bf 4201 Elf_Internal_Rela outrel;
b34976b6 4202 bfd_boolean skip, relocate;
0c715baa 4203 asection *sreloc;
252b5132
RH		 4204
4205 /* When generating a shared object, these relocations
4206 are copied into the output file to be resolved at run
4207 time. */
4208
b34976b6
AM		 4209 skip = FALSE;
4210 relocate = FALSE;
252b5132 4211
c629eae0
JJ		 4212 outrel.r_offset =
4213 _bfd_elf_section_offset (output_bfd, info, input_section,
4214 rel->r_offset);
4215 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 4216 skip = TRUE;
0bb2d96a 4217 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 4218 skip = TRUE, relocate = TRUE;
252b5132
RH		 4219 outrel.r_offset += (input_section->output_section->vma
4220 + input_section->output_offset);
4221
4222 if (skip)
0bb2d96a 4223 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 4224 else if (h != NULL
4225 && h->dynindx != -1
4226 && (r_type == R_386_PC32
4e0c91e4
L		 4227 || !(bfd_link_executable (info)
4228 || SYMBOLIC_BIND (info, h))
f5385ebf 4229 || !h->def_regular))
0bb2d96a 4230 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 4231 else
4232 {
5a15f56f 4233 /* This symbol is local, or marked to become local. */
b34976b6 4234 relocate = TRUE;
5a15f56f 4235 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 4236 }
4237
cbe950e9 4238 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 4239
62d78908
L		 4240 if (sreloc == NULL || sreloc->contents == NULL)
4241 {
4242 r = bfd_reloc_notsupported;
4243 goto check_relocation_error;
4244 }
0c715baa 4245
59d6ffb2 4246 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 4247
4248 /* If this reloc is against an external symbol, we do
4249 not want to fiddle with the addend. Otherwise, we
4250 need to include the symbol value so that it becomes
4251 an addend for the dynamic reloc. */
0f88be7a 4252 if (! relocate)
252b5132
RH		 4253 continue;
4254 }
252b5132
RH		 4255 break;
4256
37e55690 4257 case R_386_TLS_IE:
0e1862bb 4258 if (!bfd_link_executable (info))
37e55690 4259 {
947216bf 4260 Elf_Internal_Rela outrel;
37e55690 4261 asection *sreloc;
37e55690
JJ		 4262
4263 outrel.r_offset = rel->r_offset
4264 + input_section->output_section->vma
4265 + input_section->output_offset;
4266 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4267 sreloc = elf_section_data (input_section)->sreloc;
4268 if (sreloc == NULL)
4269 abort ();
59d6ffb2 4270 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 4271 }
4272 /* Fall through */
4273
13ae64f3 4274 case R_386_TLS_GD:
67a4f2b7
AO		 4275 case R_386_TLS_GOTDESC:
4276 case R_386_TLS_DESC_CALL:
13ae64f3 4277 case R_386_TLS_IE_32:
37e55690 4278 case R_386_TLS_GOTIE:
13ae64f3
JJ		 4279 tls_type = GOT_UNKNOWN;
4280 if (h == NULL && local_got_offsets)
0afcef53 4281 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
13ae64f3 4282 else if (h != NULL)
0afcef53 4283 tls_type = elf_x86_hash_entry(h)->tls_type;
37e55690
JJ		 4284 if (tls_type == GOT_TLS_IE)
4285 tls_type = GOT_TLS_IE_NEG;
142411ca
L		 4286
4287 if (! elf_i386_tls_transition (info, input_bfd,
4288 input_section, contents,
4289 symtab_hdr, sym_hashes,
4290 &r_type, tls_type, rel,
bedfd056 4291 relend, h, r_symndx, TRUE))
142411ca 4292 return FALSE;
13ae64f3
JJ		 4293
4294 if (r_type == R_386_TLS_LE_32)
4295 {
82e51918 4296 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 4297 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4298 {
142411ca 4299 unsigned int type;
13ae64f3
JJ		 4300 bfd_vma roff;
4301
4302 /* GD->LE transition. */
6eaa7fb5 4303 type = *(contents + rel->r_offset - 2);
13ae64f3
JJ		 4304 if (type == 0x04)
4305 {
6eaa7fb5
L		 4306 /* Change
4307 leal foo@tlsgd(,%ebx,1), %eax
4308 call ___tls_get_addr@PLT
4309 into:
4310 movl %gs:0, %eax
4311 subl $foo@tpoff, %eax
13ae64f3 4312 (6 byte form of subl). */
142411ca 4313 roff = rel->r_offset + 5;
13ae64f3
JJ		 4314 }
4315 else
4316 {
6eaa7fb5
L		 4317 /* Change
4318 leal foo@tlsgd(%ebx), %eax
4319 call ___tls_get_addr@PLT
4320 nop
4321 or
4322 leal foo@tlsgd(%reg), %eax
4323 call *___tls_get_addr@GOT(%reg)
4324 which may be converted to
4325 addr32 call ___tls_get_addr
4326 into:
4327 movl %gs:0, %eax; subl $foo@tpoff, %eax
142411ca 4328 (6 byte form of subl). */
142411ca 4329 roff = rel->r_offset + 6;
13ae64f3 4330 }
6eaa7fb5
L		 4331 memcpy (contents + roff - 8,
4332 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
eb4ff4d6 4333 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 4334 contents + roff);
6eaa7fb5 4335 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
13ae64f3 4336 rel++;
60f2e42e 4337 wrel++;
13ae64f3
JJ		 4338 continue;
4339 }
67a4f2b7
AO		 4340 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4341 {
4342 /* GDesc -> LE transition.
4343 It's originally something like:
4344 leal x@tlsdesc(%ebx), %eax
4345
4346 leal x@ntpoff, %eax
4347
4348 Registers other than %eax may be set up here. */
4349
142411ca 4350 unsigned int val;
67a4f2b7
AO		 4351 bfd_vma roff;
4352
67a4f2b7 4353 roff = rel->r_offset;
67a4f2b7 4354 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 4355
4356 /* Now modify the instruction as appropriate. */
4357 /* aoliva FIXME: remove the above and xor the byte
4358 below with 0x86. */
4359 bfd_put_8 (output_bfd, val ^ 0x86,
4360 contents + roff - 1);
eb4ff4d6 4361 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 4362 contents + roff);
4363 continue;
4364 }
4365 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4366 {
4367 /* GDesc -> LE transition.
4368 It's originally:
4369 call *(%eax)
4370 Turn it into:
142411ca 4371 xchg %ax,%ax */
67a4f2b7 4372
67a4f2b7 4373 bfd_vma roff;
6bbec505 4374
67a4f2b7 4375 roff = rel->r_offset;
10efb593 4376 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4377 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4378 continue;
4379 }
37e55690 4380 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3 4381 {
142411ca 4382 unsigned int val;
13ae64f3
JJ		 4383
4384 /* IE->LE transition:
37e55690
JJ		 4385 Originally it can be one of:
4386 movl foo, %eax
4387 movl foo, %reg
4388 addl foo, %reg
4389 We change it into:
4390 movl $foo, %eax
4391 movl $foo, %reg
4392 addl $foo, %reg. */
37e55690 4393 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 4394 if (val == 0xa1)
4395 {
4396 /* movl foo, %eax. */
55fd94b0
AM		 4397 bfd_put_8 (output_bfd, 0xb8,
4398 contents + rel->r_offset - 1);
37e55690 4399 }
299bf759 4400 else
37e55690 4401 {
142411ca
L		 4402 unsigned int type;
4403
55fd94b0
AM		 4404 type = bfd_get_8 (input_bfd,
4405 contents + rel->r_offset - 2);
299bf759 4406 switch (type)
26e41594 4407 {
299bf759
L		 4408 case 0x8b:
4409 /* movl */
299bf759
L		 4410 bfd_put_8 (output_bfd, 0xc7,
4411 contents + rel->r_offset - 2);
4412 bfd_put_8 (output_bfd,
4413 0xc0 | ((val >> 3) & 7),
4414 contents + rel->r_offset - 1);
4415 break;
4416 case 0x03:
4417 /* addl */
299bf759
L		 4418 bfd_put_8 (output_bfd, 0x81,
4419 contents + rel->r_offset - 2);
4420 bfd_put_8 (output_bfd,
4421 0xc0 | ((val >> 3) & 7),
4422 contents + rel->r_offset - 1);
4423 break;
4424 default:
4425 BFD_FAIL ();
4426 break;
26e41594 4427 }
37e55690 4428 }
eb4ff4d6 4429 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4430 contents + rel->r_offset);
4431 continue;
4432 }
4433 else
4434 {
4435 unsigned int val, type;
4436
4437 /* {IE_32,GOTIE}->LE transition:
4438 Originally it can be one of:
13ae64f3 4439 subl foo(%reg1), %reg2
13ae64f3 4440 movl foo(%reg1), %reg2
37e55690 4441 addl foo(%reg1), %reg2
13ae64f3
JJ		 4442 We change it into:
4443 subl $foo, %reg2
37e55690
JJ		 4444 movl $foo, %reg2 (6 byte form)
4445 addl $foo, %reg2. */
13ae64f3
JJ		 4446 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4447 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 4448 if (type == 0x8b)
4449 {
4450 /* movl */
13ae64f3
JJ		 4451 bfd_put_8 (output_bfd, 0xc7,
4452 contents + rel->r_offset - 2);
4453 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4454 contents + rel->r_offset - 1);
4455 }
4456 else if (type == 0x2b)
4457 {
4458 /* subl */
13ae64f3
JJ		 4459 bfd_put_8 (output_bfd, 0x81,
4460 contents + rel->r_offset - 2);
4461 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4462 contents + rel->r_offset - 1);
4463 }
37e55690
JJ		 4464 else if (type == 0x03)
4465 {
4466 /* addl */
4467 bfd_put_8 (output_bfd, 0x81,
4468 contents + rel->r_offset - 2);
4469 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4470 contents + rel->r_offset - 1);
4471 }
13ae64f3
JJ		 4472 else
4473 BFD_FAIL ();
37e55690 4474 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
eb4ff4d6 4475 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4476 contents + rel->r_offset);
4477 else
eb4ff4d6 4478 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 4479 contents + rel->r_offset);
13ae64f3
JJ		 4480 continue;
4481 }
4482 }
4483
6de2ae4a 4484 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4485 abort ();
4486
4487 if (h != NULL)
67a4f2b7
AO		 4488 {
4489 off = h->got.offset;
0afcef53 4490 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
67a4f2b7 4491 }
13ae64f3
JJ		 4492 else
4493 {
4494 if (local_got_offsets == NULL)
4495 abort ();
4496
4497 off = local_got_offsets[r_symndx];
67a4f2b7 4498 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 4499 }
4500
4501 if ((off & 1) != 0)
4502 off &= ~1;
26e41594 4503 else
13ae64f3 4504 {
947216bf 4505 Elf_Internal_Rela outrel;
91d6fa6a 4506 int dr_type;
67a4f2b7 4507 asection *sreloc;
13ae64f3 4508
6de2ae4a 4509 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4510 abort ();
4511
67a4f2b7
AO		 4512 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4513
4514 if (GOT_TLS_GDESC_P (tls_type))
4515 {
59d6ffb2 4516 bfd_byte *loc;
67a4f2b7
AO		 4517 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4518 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 4519 <= htab->elf.sgotplt->size);
4520 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4521 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4522 + offplt
4523 + htab->sgotplt_jump_table_size);
6de2ae4a 4524 sreloc = htab->elf.srelplt;
67a4f2b7 4525 loc = sreloc->contents;
0afcef53 4526 loc += (elf_i386_next_tls_desc_index (htab)++
5ae0bfb6 4527 * sizeof (Elf32_External_Rel));
67a4f2b7 4528 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 4529 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 4530 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4531 if (indx == 0)
4532 {
4533 BFD_ASSERT (! unresolved_reloc);
4534 bfd_put_32 (output_bfd,
0afcef53 4535 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 4536 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4537 + htab->sgotplt_jump_table_size + 4);
4538 }
4539 else
4540 {
4541 bfd_put_32 (output_bfd, 0,
6de2ae4a 4542 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4543 + htab->sgotplt_jump_table_size + 4);
4544 }
4545 }
4546
6de2ae4a 4547 sreloc = htab->elf.srelgot;
67a4f2b7 4548
6de2ae4a
L		 4549 outrel.r_offset = (htab->elf.sgot->output_section->vma
4550 + htab->elf.sgot->output_offset + off);
13ae64f3 4551
67a4f2b7 4552 if (GOT_TLS_GD_P (tls_type))
13ae64f3 4553 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 4554 else if (GOT_TLS_GDESC_P (tls_type))
4555 goto dr_done;
37e55690
JJ		 4556 else if (tls_type == GOT_TLS_IE_POS)
4557 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 4558 else
4559 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 4560
37e55690 4561 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6 4562 bfd_put_32 (output_bfd,
0afcef53 4563 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 4564 htab->elf.sgot->contents + off);
37e55690 4565 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 4566 bfd_put_32 (output_bfd,
0afcef53 4567 _bfd_x86_elf_dtpoff_base (info) - relocation,
6de2ae4a 4568 htab->elf.sgot->contents + off);
67a4f2b7 4569 else if (dr_type != R_386_TLS_DESC)
c366c25e 4570 bfd_put_32 (output_bfd, 0,
6de2ae4a 4571 htab->elf.sgot->contents + off);
13ae64f3 4572 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 4573
59d6ffb2 4574 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 4575
67a4f2b7 4576 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 4577 {
4578 if (indx == 0)
4579 {
82e51918 4580 BFD_ASSERT (! unresolved_reloc);
13ae64f3 4581 bfd_put_32 (output_bfd,
0afcef53 4582 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 4583 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4584 }
4585 else
4586 {
4587 bfd_put_32 (output_bfd, 0,
6de2ae4a 4588 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4589 outrel.r_info = ELF32_R_INFO (indx,
4590 R_386_TLS_DTPOFF32);
4591 outrel.r_offset += 4;
59d6ffb2 4592 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 4593 }
4594 }
37e55690
JJ		 4595 else if (tls_type == GOT_TLS_IE_BOTH)
4596 {
4597 bfd_put_32 (output_bfd,
eb4ff4d6 4598 (indx == 0
0afcef53 4599 ? relocation - _bfd_x86_elf_dtpoff_base (info)
eb4ff4d6 4600 : 0),
6de2ae4a 4601 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 4602 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4603 outrel.r_offset += 4;
59d6ffb2 4604 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 4605 }
13ae64f3 4606
67a4f2b7 4607 dr_done:
13ae64f3
JJ		 4608 if (h != NULL)
4609 h->got.offset |= 1;
4610 else
4611 local_got_offsets[r_symndx] |= 1;
4612 }
4613
67a4f2b7
AO		 4614 if (off >= (bfd_vma) -2
4615 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 4616 abort ();
67a4f2b7
AO		 4617 if (r_type == R_386_TLS_GOTDESC
4618 || r_type == R_386_TLS_DESC_CALL)
4619 {
4620 relocation = htab->sgotplt_jump_table_size + offplt;
4621 unresolved_reloc = FALSE;
4622 }
4623 else if (r_type == ELF32_R_TYPE (rel->r_info))
13ae64f3 4624 {
6de2ae4a
L		 4625 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4626 + htab->elf.sgotplt->output_offset;
4627 relocation = htab->elf.sgot->output_section->vma
4628 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 4629 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4630 && tls_type == GOT_TLS_IE_BOTH)
4631 relocation += 4;
4632 if (r_type == R_386_TLS_IE)
8c37241b 4633 relocation += g_o_t;
b34976b6 4634 unresolved_reloc = FALSE;
13ae64f3 4635 }
67a4f2b7 4636 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
13ae64f3
JJ		 4637 {
4638 unsigned int val, type;
4639 bfd_vma roff;
4640
4641 /* GD->IE transition. */
6eaa7fb5
L		 4642 type = *(contents + rel->r_offset - 2);
4643 val = *(contents + rel->r_offset - 1);
13ae64f3
JJ		 4644 if (type == 0x04)
4645 {
6eaa7fb5
L		 4646 /* Change
4647 leal foo@tlsgd(,%ebx,1), %eax
4648 call ___tls_get_addr@PLT
4649 into:
4650 movl %gs:0, %eax
4651 subl $foo@gottpoff(%ebx), %eax. */
13ae64f3 4652 val >>= 3;
142411ca 4653 roff = rel->r_offset - 3;
13ae64f3
JJ		 4654 }
4655 else
4656 {
6eaa7fb5
L		 4657 /* Change
4658 leal foo@tlsgd(%ebx), %eax
4659 call ___tls_get_addr@PLT
4660 nop
4661 or
4662 leal foo@tlsgd(%reg), %eax
4663 call *___tls_get_addr@GOT(%reg)
4664 which may be converted to
4665 addr32 call ___tls_get_addr
4666 into:
4667 movl %gs:0, %eax;
4668 subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 4669 roff = rel->r_offset - 2;
4670 }
4671 memcpy (contents + roff,
4672 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4673 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 4674 /* If foo is used only with foo@gotntpoff(%reg) and
4675 foo@indntpoff, but not with foo@gottpoff(%reg), change
4676 subl $foo@gottpoff(%reg), %eax
4677 into:
4678 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 4679 if (tls_type == GOT_TLS_IE_POS)
4680 contents[roff + 6] = 0x03;
8c37241b 4681 bfd_put_32 (output_bfd,
6de2ae4a
L		 4682 htab->elf.sgot->output_section->vma
4683 + htab->elf.sgot->output_offset + off
4684 - htab->elf.sgotplt->output_section->vma
4685 - htab->elf.sgotplt->output_offset,
13ae64f3 4686 contents + roff + 8);
6eaa7fb5 4687 /* Skip R_386_PLT32 and R_386_GOT32X. */
13ae64f3 4688 rel++;
60f2e42e 4689 wrel++;
13ae64f3
JJ		 4690 continue;
4691 }
67a4f2b7
AO		 4692 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4693 {
4694 /* GDesc -> IE transition.
4695 It's originally something like:
4696 leal x@tlsdesc(%ebx), %eax
4697
4698 Change it to:
142411ca 4699 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 4700 or:
4701 movl x@gottpoff(%ebx), %eax # before negl %eax
4702
4703 Registers other than %eax may be set up here. */
4704
67a4f2b7
AO		 4705 bfd_vma roff;
4706
4707 /* First, make sure it's a leal adding ebx to a 32-bit
4708 offset into any register, although it's probably
4709 almost always going to be eax. */
4710 roff = rel->r_offset;
67a4f2b7
AO		 4711
4712 /* Now modify the instruction as appropriate. */
4713 /* To turn a leal into a movl in the form we use it, it
4714 suffices to change the first byte from 0x8d to 0x8b.
4715 aoliva FIXME: should we decide to keep the leal, all
4716 we have to do is remove the statement below, and
4717 adjust the relaxation of R_386_TLS_DESC_CALL. */
4718 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4719
4720 if (tls_type == GOT_TLS_IE_BOTH)
4721 off += 4;
4722
4723 bfd_put_32 (output_bfd,
6de2ae4a
L		 4724 htab->elf.sgot->output_section->vma
4725 + htab->elf.sgot->output_offset + off
4726 - htab->elf.sgotplt->output_section->vma
4727 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 4728 contents + roff);
4729 continue;
4730 }
4731 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4732 {
4733 /* GDesc -> IE transition.
4734 It's originally:
4735 call *(%eax)
4736
4737 Change it to:
142411ca 4738 xchg %ax,%ax
67a4f2b7
AO		 4739 or
4740 negl %eax
4741 depending on how we transformed the TLS_GOTDESC above.
4742 */
4743
67a4f2b7
AO		 4744 bfd_vma roff;
4745
67a4f2b7 4746 roff = rel->r_offset;
67a4f2b7
AO		 4747
4748 /* Now modify the instruction as appropriate. */
4749 if (tls_type != GOT_TLS_IE_NEG)
4750 {
10efb593
L		 4751 /* xchg %ax,%ax */
4752 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4753 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4754 }
4755 else
4756 {
4757 /* negl %eax */
4758 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4759 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4760 }
4761
4762 continue;
4763 }
4764 else
4765 BFD_ASSERT (FALSE);
13ae64f3
JJ		 4766 break;
4767
4768 case R_386_TLS_LDM:
142411ca
L		 4769 if (! elf_i386_tls_transition (info, input_bfd,
4770 input_section, contents,
4771 symtab_hdr, sym_hashes,
4772 &r_type, GOT_UNKNOWN, rel,
bedfd056 4773 relend, h, r_symndx, TRUE))
142411ca 4774 return FALSE;
13ae64f3 4775
142411ca
L		 4776 if (r_type != R_386_TLS_LDM)
4777 {
6eaa7fb5
L		 4778 /* LD->LE transition. Change
4779 leal foo@tlsldm(%ebx) %eax
4780 call ___tls_get_addr@PLT
4781 into:
4782 movl %gs:0, %eax
4783 nop
4784 leal 0(%esi,1), %esi
4785 or change
4786 leal foo@tlsldm(%reg) %eax
4787 call *___tls_get_addr@GOT(%reg)
4788 which may be converted to
4789 addr32 call ___tls_get_addr
4790 into:
4791 movl %gs:0, %eax
4792 leal 0(%esi), %esi */
142411ca 4793 BFD_ASSERT (r_type == R_386_TLS_LE_32);
6eaa7fb5
L		 4794 if (*(contents + rel->r_offset + 4) == 0xff
4795 || *(contents + rel->r_offset + 4) == 0x67)
4796 memcpy (contents + rel->r_offset - 2,
4797 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
4798 else
4799 memcpy (contents + rel->r_offset - 2,
4800 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 4801 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 4802 rel++;
60f2e42e 4803 wrel++;
13ae64f3
JJ		 4804 continue;
4805 }
4806
6de2ae4a 4807 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4808 abort ();
4809
0afcef53 4810 off = htab->tls_ld_or_ldm_got.offset;
13ae64f3
JJ		 4811 if (off & 1)
4812 off &= ~1;
4813 else
4814 {
947216bf 4815 Elf_Internal_Rela outrel;
13ae64f3 4816
6de2ae4a 4817 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4818 abort ();
4819
6de2ae4a
L		 4820 outrel.r_offset = (htab->elf.sgot->output_section->vma
4821 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 4822
4823 bfd_put_32 (output_bfd, 0,
6de2ae4a 4824 htab->elf.sgot->contents + off);
13ae64f3 4825 bfd_put_32 (output_bfd, 0,
6de2ae4a 4826 htab->elf.sgot->contents + off + 4);
13ae64f3 4827 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 4828 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
0afcef53 4829 htab->tls_ld_or_ldm_got.offset |= 1;
13ae64f3 4830 }
6de2ae4a
L		 4831 relocation = htab->elf.sgot->output_section->vma
4832 + htab->elf.sgot->output_offset + off
4833 - htab->elf.sgotplt->output_section->vma
4834 - htab->elf.sgotplt->output_offset;
b34976b6 4835 unresolved_reloc = FALSE;
13ae64f3
JJ		 4836 break;
4837
4838 case R_386_TLS_LDO_32:
0e1862bb
L		 4839 if (!bfd_link_executable (info)
4840 || (input_section->flags & SEC_CODE) == 0)
0afcef53 4841 relocation -= _bfd_x86_elf_dtpoff_base (info);
13ae64f3
JJ		 4842 else
4843 /* When converting LDO to LE, we must negate. */
eb4ff4d6 4844 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4845 break;
4846
4847 case R_386_TLS_LE_32:
13ae64f3 4848 case R_386_TLS_LE:
0e1862bb 4849 if (!bfd_link_executable (info))
37e55690 4850 {
947216bf 4851 Elf_Internal_Rela outrel;
37e55690 4852 asection *sreloc;
37e55690
JJ		 4853
4854 outrel.r_offset = rel->r_offset
4855 + input_section->output_section->vma
4856 + input_section->output_offset;
4857 if (h != NULL && h->dynindx != -1)
4858 indx = h->dynindx;
4859 else
4860 indx = 0;
4861 if (r_type == R_386_TLS_LE_32)
4862 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4863 else
4864 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4865 sreloc = elf_section_data (input_section)->sreloc;
4866 if (sreloc == NULL)
4867 abort ();
59d6ffb2 4868 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 4869 if (indx)
4870 continue;
4871 else if (r_type == R_386_TLS_LE_32)
0afcef53 4872 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
37e55690 4873 else
0afcef53 4874 relocation -= _bfd_x86_elf_dtpoff_base (info);
37e55690
JJ		 4875 }
4876 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 4877 relocation = elf_i386_tpoff (info, relocation);
37e55690 4878 else
eb4ff4d6 4879 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4880 break;
4881
252b5132
RH		 4882 default:
4883 break;
4884 }
4885
239e1f3a
AM		 4886 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4887 because such sections are not SEC_ALLOC and thus ld.so will
4888 not process them. */
8c694914 4889 if (unresolved_reloc
239e1f3a 4890 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4891 && h->def_dynamic)
4892 && _bfd_elf_section_offset (output_bfd, info, input_section,
4893 rel->r_offset) != (bfd_vma) -1)
6a30718d 4894 {
4eca0228 4895 _bfd_error_handler
695344c0 4896 /* xgettext:c-format */
d42c267e 4897 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 4898 input_bfd,
4899 input_section,
d42c267e 4900 rel->r_offset,
843fe662 4901 howto->name,
6a30718d 4902 h->root.root.string);
b34976b6 4903 return FALSE;
6a30718d 4904 }
83be169b 4905
cbe950e9 4906do_relocation:
252b5132
RH		 4907 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4908 contents, rel->r_offset,
55fd94b0 4909 relocation, 0);
252b5132 4910
62d78908 4911check_relocation_error:
cf5c0c5b 4912 if (r != bfd_reloc_ok)
252b5132 4913 {
cf5c0c5b 4914 const char *name;
ffb2e45b 4915
cf5c0c5b
AM		 4916 if (h != NULL)
4917 name = h->root.root.string;
4918 else
4919 {
4920 name = bfd_elf_string_from_elf_section (input_bfd,
4921 symtab_hdr->sh_link,
4922 sym->st_name);
4923 if (name == NULL)
b34976b6 4924 return FALSE;
cf5c0c5b
AM		 4925 if (*name == '\0')
4926 name = bfd_section_name (input_bfd, sec);
4927 }
ffb2e45b 4928
cf5c0c5b 4929 if (r == bfd_reloc_overflow)
1a72702b
AM		 4930 (*info->callbacks->reloc_overflow)
4931 (info, (h ? &h->root : NULL), name, howto->name,
4932 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
cf5c0c5b
AM		 4933 else
4934 {
4eca0228 4935 _bfd_error_handler
695344c0 4936 /* xgettext:c-format */
d42c267e 4937 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
d003868e 4938 input_bfd, input_section,
d42c267e 4939 rel->r_offset, name, (int) r);
b34976b6 4940 return FALSE;
cf5c0c5b 4941 }
252b5132 4942 }
60f2e42e
L		 4943
4944 if (wrel != rel)
4945 *wrel = *rel;
4946 }
4947
4948 if (wrel != rel)
4949 {
4950 Elf_Internal_Shdr *rel_hdr;
4951 size_t deleted = rel - wrel;
4952
4953 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4954 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4955 if (rel_hdr->sh_size == 0)
4956 {
4957 /* It is too late to remove an empty reloc section. Leave
4958 one NONE reloc.
4959 ??? What is wrong with an empty section??? */
4960 rel_hdr->sh_size = rel_hdr->sh_entsize;
4961 deleted -= 1;
4962 }
4963 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4964 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4965 input_section->reloc_count -= deleted;
252b5132
RH		 4966 }
4967
b34976b6 4968 return TRUE;
252b5132
RH		 4969}
4970
4971/* Finish up dynamic symbol handling. We set the contents of various
4972 dynamic sections here. */
4973
b34976b6 4974static bfd_boolean
55fd94b0
AM		 4975elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4976 struct bfd_link_info *info,
4977 struct elf_link_hash_entry *h,
4978 Elf_Internal_Sym *sym)
252b5132 4979{
0afcef53 4980 struct elf_x86_link_hash_table *htab;
25e762b9
RM		 4981 unsigned plt_entry_size;
4982 const struct elf_i386_backend_data *abed;
0afcef53 4983 struct elf_x86_link_hash_entry *eh;
aec6b87e 4984 bfd_boolean local_undefweak;
ee2fdd6f 4985 bfd_boolean use_plt_second;
0afcef53
L		 4986 const struct elf_i386_plt_layout *plt_layout;
4987 const struct elf_i386_lazy_plt_layout *lazy_plt_layout;
4988 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt_layout;
252b5132 4989
0afcef53 4990 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 4991 if (htab == NULL)
4992 return FALSE;
252b5132 4993
25e762b9 4994 abed = get_elf_i386_backend_data (output_bfd);
0afcef53
L		 4995 plt_layout = &elf_i386_plt (htab);
4996 lazy_plt_layout = elf_i386_lazy_plt (htab);
4997 non_lazy_plt_layout = elf_i386_non_lazy_plt (htab);
4998 plt_entry_size = plt_layout->plt_entry_size;
25e762b9 4999
ee2fdd6f
L		 5000 /* Use the second PLT section only if there is .plt section. */
5001 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
5002
0afcef53 5003 eh = (struct elf_x86_link_hash_entry *) h;
e133d005
L		 5004 if (eh->no_finish_dynamic_symbol)
5005 abort ();
dd7e64d4 5006
aec6b87e
L		 5007 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5008 resolved undefined weak symbols in executable so that their
5009 references have value 0 at run-time. */
0afcef53 5010 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, I386_ELF_DATA,
e62b9723
L		 5011 eh->has_got_reloc,
5012 eh);
aec6b87e 5013
252b5132
RH		 5014 if (h->plt.offset != (bfd_vma) -1)
5015 {
ee2fdd6f 5016 bfd_vma plt_index, plt_offset;
252b5132 5017 bfd_vma got_offset;
947216bf
AM		 5018 Elf_Internal_Rela rel;
5019 bfd_byte *loc;
ee2fdd6f 5020 asection *plt, *resolved_plt, *gotplt, *relplt;
cbe950e9
L		 5021
5022 /* When building a static executable, use .iplt, .igot.plt and
5023 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 5024 if (htab->elf.splt != NULL)
cbe950e9 5025 {
6de2ae4a
L		 5026 plt = htab->elf.splt;
5027 gotplt = htab->elf.sgotplt;
5028 relplt = htab->elf.srelplt;
cbe950e9
L		 5029 }
5030 else
5031 {
6de2ae4a
L		 5032 plt = htab->elf.iplt;
5033 gotplt = htab->elf.igotplt;
5034 relplt = htab->elf.irelplt;
cbe950e9 5035 }
252b5132
RH		 5036
5037 /* This symbol has an entry in the procedure linkage table. Set
5038 it up. */
5039
cbe950e9 5040 if ((h->dynindx == -1
aec6b87e 5041 && !local_undefweak
0e1862bb 5042 && !((h->forced_local || bfd_link_executable (info))
cbe950e9
L		 5043 && h->def_regular
5044 && h->type == STT_GNU_IFUNC))
5045 || plt == NULL
5046 || gotplt == NULL
5047 || relplt == NULL)
cec7f46a 5048 abort ();
252b5132
RH		 5049
5050 /* Get the index in the procedure linkage table which
5051 corresponds to this symbol. This is the index of this symbol
5052 in all the symbols for which we are making plt entries. The
cbe950e9 5053 first entry in the procedure linkage table is reserved.
252b5132 5054
cbe950e9 5055 Get the offset into the .got table of the entry that
252b5132 5056 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 5057 The first three are reserved.
6bbec505 5058
cbe950e9
L		 5059 For static executables, we don't reserve anything. */
5060
6de2ae4a 5061 if (plt == htab->elf.splt)
cbe950e9 5062 {
f604c2a2 5063 got_offset = (h->plt.offset / plt_entry_size
0afcef53 5064 - plt_layout->has_plt0);
e1f98742 5065 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 5066 }
5067 else
5068 {
e1f98742
L		 5069 got_offset = h->plt.offset / plt_entry_size;
5070 got_offset = got_offset * 4;
cbe950e9 5071 }
252b5132 5072
f604c2a2
L		 5073 /* Fill in the entry in the procedure linkage table and update
5074 the first slot. */
0afcef53 5075 memcpy (plt->contents + h->plt.offset, plt_layout->plt_entry,
f604c2a2 5076 plt_entry_size);
ee2fdd6f
L		 5077
5078 if (use_plt_second)
5079 {
5080 const bfd_byte *plt_entry;
5081 if (bfd_link_pic (info))
0afcef53 5082 plt_entry = non_lazy_plt_layout->pic_plt_entry;
ee2fdd6f 5083 else
0afcef53 5084 plt_entry = non_lazy_plt_layout->plt_entry;
ee2fdd6f 5085 memcpy (htab->plt_second->contents + eh->plt_second.offset,
0afcef53 5086 plt_entry, non_lazy_plt_layout->plt_entry_size);
ee2fdd6f
L		 5087
5088 resolved_plt = htab->plt_second;
5089 plt_offset = eh->plt_second.offset;
5090 }
5091 else
5092 {
5093 resolved_plt = plt;
5094 plt_offset = h->plt.offset;
5095 }
5096
0e1862bb 5097 if (! bfd_link_pic (info))
252b5132 5098 {
252b5132 5099 bfd_put_32 (output_bfd,
cbe950e9
L		 5100 (gotplt->output_section->vma
5101 + gotplt->output_offset
252b5132 5102 + got_offset),
ee2fdd6f 5103 resolved_plt->contents + plt_offset
0afcef53 5104 + plt_layout->plt_got_offset);
eac338cf 5105
f604c2a2 5106 if (abed->os == is_vxworks)
eac338cf
PB		 5107 {
5108 int s, k, reloc_index;
5109
5110 /* Create the R_386_32 relocation referencing the GOT
5111 for this PLT entry. */
5112
5113 /* S: Current slot number (zero-based). */
0afcef53
L		 5114 s = ((h->plt.offset - plt_layout->plt_entry_size)
5115 / plt_layout->plt_entry_size);
eac338cf 5116 /* K: Number of relocations for PLTResolve. */
0e1862bb 5117 if (bfd_link_pic (info))
eac338cf
PB		 5118 k = PLTRESOLVE_RELOCS_SHLIB;
5119 else
5120 k = PLTRESOLVE_RELOCS;
5121 /* Skip the PLTresolve relocations, and the relocations for
5122 the other PLT slots. */
5123 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
0afcef53 5124 loc = (elf_i386_srelplt2 (htab)->contents + reloc_index
eac338cf
PB		 5125 * sizeof (Elf32_External_Rel));
5126
ee2fdd6f
L		 5127 rel.r_offset = (plt->output_section->vma
5128 + plt->output_offset
eac338cf 5129 + h->plt.offset + 2),
7325306f 5130 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 5131 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5132
5133 /* Create the R_386_32 relocation referencing the beginning of
5134 the PLT for this GOT entry. */
6de2ae4a
L		 5135 rel.r_offset = (htab->elf.sgotplt->output_section->vma
5136 + htab->elf.sgotplt->output_offset
eac338cf 5137 + got_offset);
7325306f 5138 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 5139 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 5140 loc + sizeof (Elf32_External_Rel));
eac338cf 5141 }
252b5132
RH		 5142 }
5143 else
5144 {
252b5132 5145 bfd_put_32 (output_bfd, got_offset,
ee2fdd6f 5146 resolved_plt->contents + plt_offset
0afcef53 5147 + plt_layout->plt_got_offset);
252b5132
RH		 5148 }
5149
aec6b87e
L		 5150 /* Fill in the entry in the global offset table. Leave the entry
5151 as zero for undefined weak symbol in PIE. No PLT relocation
5152 against undefined weak symbol in PIE. */
5153 if (!local_undefweak)
cbe950e9 5154 {
0afcef53 5155 if (plt_layout->has_plt0)
f604c2a2
L		 5156 bfd_put_32 (output_bfd,
5157 (plt->output_section->vma
5158 + plt->output_offset
5159 + h->plt.offset
0afcef53 5160 + lazy_plt_layout->plt_lazy_offset),
f604c2a2 5161 gotplt->contents + got_offset);
252b5132 5162
aec6b87e
L		 5163 /* Fill in the entry in the .rel.plt section. */
5164 rel.r_offset = (gotplt->output_section->vma
5165 + gotplt->output_offset
5166 + got_offset);
5167 if (h->dynindx == -1
5168 || ((bfd_link_executable (info)
5169 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5170 && h->def_regular
5171 && h->type == STT_GNU_IFUNC))
5172 {
6322e5c5
L		 5173 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5174 h->root.root.string,
5175 h->root.u.def.section->owner);
5176
aec6b87e
L		 5177 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5178 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5179 in the .got.plt section. */
5180 bfd_put_32 (output_bfd,
5181 (h->root.u.def.value
5182 + h->root.u.def.section->output_section->vma
5183 + h->root.u.def.section->output_offset),
5184 gotplt->contents + got_offset);
5185 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5186 /* R_386_IRELATIVE comes last. */
5187 plt_index = htab->next_irelative_index--;
5188 }
5189 else
5190 {
5191 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
5192 plt_index = htab->next_jump_slot_index++;
5193 }
5194
5195 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
5196 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5197
f604c2a2
L		 5198 /* Don't fill the second and third slots in PLT entry for
5199 static executables nor without PLT0. */
0afcef53 5200 if (plt == htab->elf.splt && plt_layout->has_plt0)
aec6b87e
L		 5201 {
5202 bfd_put_32 (output_bfd,
5203 plt_index * sizeof (Elf32_External_Rel),
5204 plt->contents + h->plt.offset
0afcef53 5205 + lazy_plt_layout->plt_reloc_offset);
f604c2a2
L		 5206 bfd_put_32 (output_bfd,
5207 - (h->plt.offset
0afcef53 5208 + lazy_plt_layout->plt_plt_offset + 4),
f604c2a2 5209 (plt->contents + h->plt.offset
0afcef53 5210 + lazy_plt_layout->plt_plt_offset));
aec6b87e 5211 }
e1f98742 5212 }
dd7e64d4
L		 5213 }
5214 else if (eh->plt_got.offset != (bfd_vma) -1)
5215 {
5216 bfd_vma got_offset, plt_offset;
5217 asection *plt, *got, *gotplt;
5218 const bfd_byte *got_plt_entry;
5219
dd7e64d4
L		 5220 /* Set the entry in the GOT procedure linkage table. */
5221 plt = htab->plt_got;
5222 got = htab->elf.sgot;
5223 gotplt = htab->elf.sgotplt;
5224 got_offset = h->got.offset;
5225
5226 if (got_offset == (bfd_vma) -1
5227 || plt == NULL
5228 || got == NULL
5229 || gotplt == NULL)
5230 abort ();
5231
5232 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 5233 if (! bfd_link_pic (info))
252b5132 5234 {
0afcef53 5235 got_plt_entry = non_lazy_plt_layout->plt_entry;
dd7e64d4 5236 got_offset += got->output_section->vma + got->output_offset;
252b5132 5237 }
dd7e64d4
L		 5238 else
5239 {
0afcef53 5240 got_plt_entry = non_lazy_plt_layout->pic_plt_entry;
dd7e64d4
L		 5241 got_offset += (got->output_section->vma
5242 + got->output_offset
5243 - gotplt->output_section->vma
5244 - gotplt->output_offset);
5245 }
5246
5247 plt_offset = eh->plt_got.offset;
5248 memcpy (plt->contents + plt_offset, got_plt_entry,
0afcef53 5249 non_lazy_plt_layout->plt_entry_size);
dd7e64d4 5250 bfd_put_32 (output_bfd, got_offset,
f604c2a2 5251 (plt->contents + plt_offset
0afcef53 5252 + non_lazy_plt_layout->plt_got_offset));
dd7e64d4
L		 5253 }
5254
aec6b87e
L		 5255 if (!local_undefweak
5256 && !h->def_regular
dd7e64d4
L		 5257 && (h->plt.offset != (bfd_vma) -1
5258 || eh->plt_got.offset != (bfd_vma) -1))
5259 {
5260 /* Mark the symbol as undefined, rather than as defined in
5261 the .plt section. Leave the value if there were any
5262 relocations where pointer equality matters (this is a clue
5263 for the dynamic linker, to make function pointer
5264 comparisons work between an application and shared
5265 library), otherwise set it to zero. If a function is only
5266 called from a binary, there is no need to slow down
5267 shared libraries because of that. */
5268 sym->st_shndx = SHN_UNDEF;
5269 if (!h->pointer_equality_needed)
5270 sym->st_value = 0;
252b5132
RH		 5271 }
5272
aec6b87e
L		 5273 /* Don't generate dynamic GOT relocation against undefined weak
5274 symbol in executable. */
13ae64f3 5275 if (h->got.offset != (bfd_vma) -1
0afcef53
L		 5276 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
5277 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
aec6b87e 5278 && !local_undefweak)
252b5132 5279 {
947216bf 5280 Elf_Internal_Rela rel;
233cc9c1 5281 asection *relgot = htab->elf.srelgot;
252b5132
RH		 5282
5283 /* This symbol has an entry in the global offset table. Set it
5284 up. */
5285
6de2ae4a 5286 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 5287 abort ();
252b5132 5288
6de2ae4a
L		 5289 rel.r_offset = (htab->elf.sgot->output_section->vma
5290 + htab->elf.sgot->output_offset
dc810e39 5291 + (h->got.offset & ~(bfd_vma) 1));
252b5132 5292
dd5724d5
AM		 5293 /* If this is a static link, or it is a -Bsymbolic link and the
5294 symbol is defined locally or was forced to be local because
5295 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 5296 The entry in the global offset table will already have been
5297 initialized in the relocate_section function. */
710ab287 5298 if (h->def_regular
0018b0a3
L		 5299 && h->type == STT_GNU_IFUNC)
5300 {
233cc9c1
L		 5301 if (h->plt.offset == (bfd_vma) -1)
5302 {
5303 /* STT_GNU_IFUNC is referenced without PLT. */
5304 if (htab->elf.splt == NULL)
5305 {
5306 /* use .rel[a].iplt section to store .got relocations
5307 in static executable. */
5308 relgot = htab->elf.irelplt;
5309 }
5310 if (SYMBOL_REFERENCES_LOCAL (info, h))
5311 {
6322e5c5
L		 5312 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5313 h->root.root.string,
5314 h->root.u.def.section->owner);
5315
233cc9c1
L		 5316 bfd_put_32 (output_bfd,
5317 (h->root.u.def.value
5318 + h->root.u.def.section->output_section->vma
5319 + h->root.u.def.section->output_offset),
5320 htab->elf.sgot->contents + h->got.offset);
5321 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5322 }
5323 else
5324 goto do_glob_dat;
5325 }
5326 else if (bfd_link_pic (info))
710ab287
L		 5327 {
5328 /* Generate R_386_GLOB_DAT. */
5329 goto do_glob_dat;
5330 }
5331 else
5332 {
cd2b2c10 5333 asection *plt;
ee2fdd6f 5334 bfd_vma plt_offset;
cd2b2c10 5335
710ab287
L		 5336 if (!h->pointer_equality_needed)
5337 abort ();
5338
5339 /* For non-shared object, we can't use .got.plt, which
5340 contains the real function addres if we need pointer
5341 equality. We load the GOT entry with the PLT entry. */
ee2fdd6f
L		 5342 if (htab->plt_second != NULL)
5343 {
5344 plt = htab->plt_second;
5345 plt_offset = eh->plt_second.offset;
5346 }
5347 else
5348 {
5349 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5350 plt_offset = h->plt.offset;
5351 }
710ab287
L		 5352 bfd_put_32 (output_bfd,
5353 (plt->output_section->vma
ee2fdd6f 5354 + plt->output_offset + plt_offset),
6de2ae4a 5355 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 5356 return TRUE;
5357 }
0018b0a3 5358 }
0e1862bb 5359 else if (bfd_link_pic (info)
0018b0a3 5360 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 5361 {
6725bdbf 5362 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 5363 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
5364 }
252b5132
RH		 5365 else
5366 {
dd5724d5 5367 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 5368do_glob_dat:
6725bdbf 5369 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 5370 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 5371 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
5372 }
5373
233cc9c1 5374 elf_append_rel (output_bfd, relgot, &rel);
252b5132
RH		 5375 }
5376
f5385ebf 5377 if (h->needs_copy)
252b5132 5378 {
947216bf 5379 Elf_Internal_Rela rel;
5474d94f 5380 asection *s;
252b5132
RH		 5381
5382 /* This symbol needs a copy reloc. Set it up. */
5383
ffb2e45b
AM		 5384 if (h->dynindx == -1
5385 || (h->root.type != bfd_link_hash_defined
5386 && h->root.type != bfd_link_hash_defweak)
5474d94f
AM		 5387 || htab->elf.srelbss == NULL
5388 || htab->elf.sreldynrelro == NULL)
ffb2e45b 5389 abort ();
252b5132
RH		 5390
5391 rel.r_offset = (h->root.u.def.value
5392 + h->root.u.def.section->output_section->vma
5393 + h->root.u.def.section->output_offset);
5394 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
afbf7e8e 5395 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 5396 s = htab->elf.sreldynrelro;
5397 else
5398 s = htab->elf.srelbss;
5399 elf_append_rel (output_bfd, s, &rel);
252b5132
RH		 5400 }
5401
b34976b6 5402 return TRUE;
252b5132
RH		 5403}
5404
c25bc9fc
L		 5405/* Finish up local dynamic symbol handling. We set the contents of
5406 various dynamic sections here. */
5407
5408static bfd_boolean
5409elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5410{
5411 struct elf_link_hash_entry *h
5412 = (struct elf_link_hash_entry *) *slot;
5413 struct bfd_link_info *info
23209a78 5414 = (struct bfd_link_info *) inf;
c25bc9fc
L		 5415
5416 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5417 h, NULL);
5418}
5419
aec6b87e
L		 5420/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5421 here since undefined weak symbol may not be dynamic and may not be
5422 called for elf_i386_finish_dynamic_symbol. */
5423
5424static bfd_boolean
5425elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5426 void *inf)
5427{
5428 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5429 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5430
5431 if (h->root.type != bfd_link_hash_undefweak
5432 || h->dynindx != -1)
5433 return TRUE;
5434
5435 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5436 info, h, NULL);
5437}
5438
38701953
AM		 5439/* Used to decide how to sort relocs in an optimal manner for the
5440 dynamic linker, before writing them out. */
5441
5442static enum elf_reloc_type_class
cae1fbbb 5443elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 5444 const asection *rel_sec ATTRIBUTE_UNUSED,
5445 const Elf_Internal_Rela *rela)
38701953 5446{
cae1fbbb
L		 5447 bfd *abfd = info->output_bfd;
5448 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5449 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 5450
d9e3b590
L		 5451 if (htab->dynsym != NULL
5452 && htab->dynsym->contents != NULL)
5453 {
5454 /* Check relocation against STT_GNU_IFUNC symbol if there are
5455 dynamic symbols. */
5456 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
c428ce9d
L		 5457 if (r_symndx != STN_UNDEF)
5458 {
5459 Elf_Internal_Sym sym;
5460 if (!bed->s->swap_symbol_in (abfd,
5461 (htab->dynsym->contents
5462 + r_symndx * sizeof (Elf32_External_Sym)),
5463 0, &sym))
5464 abort ();
d9e3b590 5465
c428ce9d
L		 5466 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5467 return reloc_class_ifunc;
5468 }
d9e3b590 5469 }
cae1fbbb 5470
55fd94b0 5471 switch (ELF32_R_TYPE (rela->r_info))
38701953 5472 {
c428ce9d
L		 5473 case R_386_IRELATIVE:
5474 return reloc_class_ifunc;
38701953
AM		 5475 case R_386_RELATIVE:
5476 return reloc_class_relative;
5477 case R_386_JUMP_SLOT:
5478 return reloc_class_plt;
5479 case R_386_COPY:
5480 return reloc_class_copy;
5481 default:
5482 return reloc_class_normal;
5483 }
5484}
5485
252b5132
RH		 5486/* Finish up the dynamic sections. */
5487
b34976b6 5488static bfd_boolean
55fd94b0
AM		 5489elf_i386_finish_dynamic_sections (bfd *output_bfd,
5490 struct bfd_link_info *info)
252b5132 5491{
0afcef53 5492 struct elf_x86_link_hash_table *htab;
252b5132 5493 bfd *dynobj;
252b5132 5494 asection *sdyn;
25e762b9 5495 const struct elf_i386_backend_data *abed;
252b5132 5496
0afcef53 5497 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 5498 if (htab == NULL)
5499 return FALSE;
5500
ebe50bae 5501 dynobj = htab->elf.dynobj;
3d4d4302 5502 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
25e762b9 5503 abed = get_elf_i386_backend_data (output_bfd);
252b5132 5504
ebe50bae 5505 if (htab->elf.dynamic_sections_created)
252b5132 5506 {
252b5132 5507 Elf32_External_Dyn *dyncon, *dynconend;
0afcef53
L		 5508 const struct elf_i386_plt_layout *plt_layout;
5509 const struct elf_i386_lazy_plt_layout *lazy_plt_layout;
5510 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt_layout;
252b5132 5511
6de2ae4a 5512 if (sdyn == NULL || htab->elf.sgot == NULL)
ffb2e45b 5513 abort ();
252b5132
RH		 5514
5515 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 5516 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 5517 for (; dyncon < dynconend; dyncon++)
5518 {
5519 Elf_Internal_Dyn dyn;
51b64d56 5520 asection *s;
252b5132
RH		 5521
5522 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5523
5524 switch (dyn.d_tag)
5525 {
5526 default:
f604c2a2 5527 if (abed->os == is_vxworks
25e762b9 5528 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7a2b07ff 5529 break;
0ac8d2ca 5530 continue;
252b5132
RH		 5531
5532 case DT_PLTGOT:
6de2ae4a 5533 s = htab->elf.sgotplt;
8c37241b 5534 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 5535 break;
5536
252b5132 5537 case DT_JMPREL:
6de2ae4a 5538 s = htab->elf.srelplt;
6348e046 5539 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 5540 break;
5541
5542 case DT_PLTRELSZ:
6de2ae4a 5543 s = htab->elf.srelplt;
eea6121a 5544 dyn.d_un.d_val = s->size;
252b5132 5545 break;
252b5132 5546 }
0ac8d2ca
AM		 5547
5548 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 5549 }
5550
0afcef53
L		 5551 plt_layout = &elf_i386_plt (htab);
5552 lazy_plt_layout = elf_i386_lazy_plt (htab);
5553 non_lazy_plt_layout = elf_i386_non_lazy_plt (htab);
5554
6de2ae4a 5555 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 5556 {
1f78f649
L		 5557 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5558 really seem like the right value. */
5559 elf_section_data (htab->elf.splt->output_section)
5560 ->this_hdr.sh_entsize = 4;
5561
0afcef53 5562 if (plt_layout->has_plt0)
252b5132 5563 {
f604c2a2
L		 5564 /* Fill in the special first entry in the procedure linkage
5565 table. */
0afcef53
L		 5566 memcpy (htab->elf.splt->contents, plt_layout->plt0_entry,
5567 lazy_plt_layout->plt0_entry_size);
5568 memset (htab->elf.splt->contents + lazy_plt_layout->plt0_entry_size,
25e762b9 5569 abed->plt0_pad_byte,
0afcef53 5570 plt_layout->plt_entry_size - lazy_plt_layout->plt0_entry_size);
f604c2a2 5571 if (!bfd_link_pic (info))
eac338cf 5572 {
f604c2a2
L		 5573 bfd_put_32 (output_bfd,
5574 (htab->elf.sgotplt->output_section->vma
5575 + htab->elf.sgotplt->output_offset
5576 + 4),
5577 htab->elf.splt->contents
0afcef53 5578 + lazy_plt_layout->plt0_got1_offset);
f604c2a2
L		 5579 bfd_put_32 (output_bfd,
5580 (htab->elf.sgotplt->output_section->vma
5581 + htab->elf.sgotplt->output_offset
5582 + 8),
5583 htab->elf.splt->contents
0afcef53 5584 + lazy_plt_layout->plt0_got2_offset);
eac338cf 5585
f604c2a2 5586 if (abed->os == is_vxworks)
1f78f649 5587 {
f604c2a2
L		 5588 Elf_Internal_Rela rel;
5589 int num_plts = (htab->elf.splt->size
0afcef53 5590 / plt_layout->plt_entry_size) - 1;
f604c2a2 5591 unsigned char *p;
0afcef53 5592 asection *srelplt2 = elf_i386_srelplt2 (htab);
f604c2a2
L		 5593
5594 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5595 + 4. On IA32 we use REL relocations so the
5596 addend goes in the PLT directly. */
5597 rel.r_offset = (htab->elf.splt->output_section->vma
5598 + htab->elf.splt->output_offset
0afcef53 5599 + lazy_plt_layout->plt0_got1_offset);
1f78f649
L		 5600 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5601 R_386_32);
f604c2a2 5602 bfd_elf32_swap_reloc_out (output_bfd, &rel,
0afcef53 5603 srelplt2->contents);
f604c2a2
L		 5604 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5605 + 8. */
5606 rel.r_offset = (htab->elf.splt->output_section->vma
5607 + htab->elf.splt->output_offset
0afcef53 5608 + lazy_plt_layout->plt0_got2_offset);
f604c2a2 5609 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
1f78f649 5610 R_386_32);
f604c2a2 5611 bfd_elf32_swap_reloc_out (output_bfd, &rel,
0afcef53 5612 srelplt2->contents +
f604c2a2
L		 5613 sizeof (Elf32_External_Rel));
5614 /* Correct the .rel.plt.unloaded relocations. */
0afcef53 5615 p = srelplt2->contents;
f604c2a2
L		 5616 if (bfd_link_pic (info))
5617 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5618 else
5619 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5620
5621 for (; num_plts; num_plts--)
5622 {
5623 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5624 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5625 R_386_32);
5626 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5627 p += sizeof (Elf32_External_Rel);
5628
5629 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5630 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
5631 R_386_32);
5632 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5633 p += sizeof (Elf32_External_Rel);
5634 }
1f78f649 5635 }
eac338cf
PB		 5636 }
5637 }
252b5132 5638 }
f604c2a2
L		 5639
5640 if (htab->plt_got != NULL && htab->plt_got->size > 0)
5641 elf_section_data (htab->plt_got->output_section)
0afcef53 5642 ->this_hdr.sh_entsize = non_lazy_plt_layout->plt_entry_size;
ee2fdd6f
L		 5643
5644 if (htab->plt_second != NULL && htab->plt_second->size > 0)
5645 elf_section_data (htab->plt_second->output_section)
0afcef53 5646 ->this_hdr.sh_entsize = non_lazy_plt_layout->plt_entry_size;
252b5132
RH		 5647 }
5648
f604c2a2
L		 5649 /* Fill in the first three entries in the global offset table. */
5650 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
252b5132 5651 {
56d4289c
L		 5652 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5653 {
4eca0228 5654 _bfd_error_handler
56d4289c
L		 5655 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5656 return FALSE;
5657 }
5658
f604c2a2
L		 5659 bfd_put_32 (output_bfd,
5660 (sdyn == NULL ? 0
5661 : sdyn->output_section->vma + sdyn->output_offset),
5662 htab->elf.sgotplt->contents);
5663 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5664 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
252b5132 5665
6de2ae4a 5666 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
12d0ee4a 5667 }
8c37241b 5668
e41b3a13 5669 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 5670 if (htab->plt_eh_frame != NULL
5671 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 5672 {
5673 if (htab->elf.splt != NULL
5674 && htab->elf.splt->size != 0
5675 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5676 && htab->elf.splt->output_section != NULL
5677 && htab->plt_eh_frame->output_section != NULL)
5678 {
5679 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5680 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5681 + htab->plt_eh_frame->output_offset
5682 + PLT_FDE_START_OFFSET;
5683 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5684 htab->plt_eh_frame->contents
5685 + PLT_FDE_START_OFFSET);
5686 }
5687 if (htab->plt_eh_frame->sec_info_type
dbaa2011 5688 == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 5689 {
5690 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5691 htab->plt_eh_frame,
5692 htab->plt_eh_frame->contents))
5693 return FALSE;
5694 }
5695 }
5696
fff53dae
L		 5697 /* Adjust .eh_frame for .plt.got section. */
5698 if (htab->plt_got_eh_frame != NULL
5699 && htab->plt_got_eh_frame->contents != NULL)
5700 {
5701 if (htab->plt_got != NULL
5702 && htab->plt_got->size != 0
5703 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5704 && htab->plt_got->output_section != NULL
5705 && htab->plt_got_eh_frame->output_section != NULL)
5706 {
5707 bfd_vma plt_start = htab->plt_got->output_section->vma;
5708 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5709 + htab->plt_got_eh_frame->output_offset
5710 + PLT_FDE_START_OFFSET;
5711 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5712 htab->plt_got_eh_frame->contents
5713 + PLT_FDE_START_OFFSET);
5714 }
5715 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5716 {
5717 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5718 htab->plt_got_eh_frame,
5719 htab->plt_got_eh_frame->contents))
5720 return FALSE;
5721 }
5722 }
5723
ee2fdd6f
L		 5724 /* Adjust .eh_frame for the second PLT section. */
5725 if (htab->plt_second_eh_frame != NULL
5726 && htab->plt_second_eh_frame->contents != NULL)
5727 {
5728 if (htab->plt_second != NULL
5729 && htab->plt_second->size != 0
5730 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
5731 && htab->plt_second->output_section != NULL
5732 && htab->plt_second_eh_frame->output_section != NULL)
5733 {
5734 bfd_vma plt_start = htab->plt_second->output_section->vma;
5735 bfd_vma eh_frame_start
5736 = (htab->plt_second_eh_frame->output_section->vma
5737 + htab->plt_second_eh_frame->output_offset
5738 + PLT_FDE_START_OFFSET);
5739 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5740 htab->plt_second_eh_frame->contents
5741 + PLT_FDE_START_OFFSET);
5742 }
5743 if (htab->plt_second_eh_frame->sec_info_type
5744 == SEC_INFO_TYPE_EH_FRAME)
5745 {
5746 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5747 htab->plt_second_eh_frame,
5748 htab->plt_second_eh_frame->contents))
5749 return FALSE;
5750 }
5751 }
5752
6de2ae4a
L		 5753 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5754 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
8c37241b 5755
aec6b87e
L		 5756 /* Fill PLT entries for undefined weak symbols in PIE. */
5757 if (bfd_link_pie (info))
5758 bfd_hash_traverse (&info->hash->table,
5759 elf_i386_pie_finish_undefweak_symbol,
5760 info);
5761
b34976b6 5762 return TRUE;
252b5132
RH		 5763}
5764
233cc9c1
L		 5765/* Fill PLT/GOT entries and allocate dynamic relocations for local
5766 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5767 It has to be done before elf_link_sort_relocs is called so that
5768 dynamic relocations are properly sorted. */
5769
5770static bfd_boolean
5771elf_i386_output_arch_local_syms
5772 (bfd *output_bfd ATTRIBUTE_UNUSED,
5773 struct bfd_link_info *info,
5774 void *flaginfo ATTRIBUTE_UNUSED,
5775 int (*func) (void *, const char *,
5776 Elf_Internal_Sym *,
5777 asection *,
5778 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5779{
0afcef53
L		 5780 struct elf_x86_link_hash_table *htab
5781 = elf_x86_hash_table (info, I386_ELF_DATA);
233cc9c1
L		 5782 if (htab == NULL)
5783 return FALSE;
5784
5785 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5786 htab_traverse (htab->loc_hash_table,
5787 elf_i386_finish_local_dynamic_symbol,
5788 info);
5789
5790 return TRUE;
5791}
5792
f604c2a2
L		 5793enum elf_i386_plt_type
5794{
5795 plt_non_lazy = 0,
5796 plt_lazy = 1 << 0,
5797 plt_pic = 1 << 1,
ee2fdd6f 5798 plt_second = 1 << 2,
f604c2a2
L		 5799 plt_unknown = -1
5800};
5801
5802struct elf_i386_plt
5803{
5804 const char *name;
5805 asection *sec;
5806 bfd_byte *contents;
5807 enum elf_i386_plt_type type;
5808 unsigned int plt_got_offset;
5809 unsigned int plt_entry_size;
5810 long count;
5811};
5812
5813/* Forward declaration. */
5814static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt;
5815
5816/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
5817 dynamic relocations. */
5818
5819static long
5820elf_i386_get_synthetic_symtab (bfd *abfd,
5821 long symcount ATTRIBUTE_UNUSED,
5822 asymbol **syms ATTRIBUTE_UNUSED,
5823 long dynsymcount,
5824 asymbol **dynsyms,
5825 asymbol **ret)
5826{
98c5dfc9 5827 long size, count, i, n, len;
f604c2a2
L		 5828 int j;
5829 unsigned int plt_got_offset, plt_entry_size;
5830 asymbol *s;
5831 bfd_byte *plt_contents;
5832 long dynrelcount, relsize;
98c5dfc9 5833 arelent **dynrelbuf, *p;
f604c2a2
L		 5834 const struct elf_i386_lazy_plt_layout *lazy_plt;
5835 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt;
ee2fdd6f
L		 5836 const struct elf_i386_lazy_plt_layout *lazy_ibt_plt;
5837 const struct elf_i386_non_lazy_plt_layout *non_lazy_ibt_plt;
f604c2a2
L		 5838 asection *plt;
5839 bfd_vma got_addr;
5840 char *names;
5841 enum elf_i386_plt_type plt_type;
5842 struct elf_i386_plt plts[] =
3972882e 5843 {
f604c2a2
L		 5844 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0 },
5845 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0 },
ee2fdd6f 5846 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0 },
dd9e66ee 5847 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0 }
f604c2a2 5848 };
144bed8d 5849
f604c2a2 5850 *ret = NULL;
144bed8d 5851
f604c2a2
L		 5852 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5853 return 0;
3972882e 5854
f604c2a2
L		 5855 if (dynsymcount <= 0)
5856 return 0;
cca5b8b6 5857
f604c2a2
L		 5858 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
5859 if (relsize <= 0)
5860 return -1;
cca5b8b6 5861
f604c2a2
L		 5862 non_lazy_plt = NULL;
5863 /* Silence GCC 6. */
5864 lazy_plt = NULL;
ee2fdd6f
L		 5865 non_lazy_ibt_plt = NULL;
5866 lazy_ibt_plt = NULL;
f604c2a2 5867 switch (get_elf_i386_backend_data (abfd)->os)
144bed8d 5868 {
f604c2a2
L		 5869 case is_normal:
5870 non_lazy_plt = &elf_i386_non_lazy_plt;
ee2fdd6f
L		 5871 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5872 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 5873 /* Fall through */
5874 case is_vxworks:
5875 lazy_plt = &elf_i386_lazy_plt;
5876 break;
5877 case is_nacl:
5878 lazy_plt = &elf_i386_nacl_plt;
5879 break;
5880 }
5881
5882 got_addr = 0;
3972882e 5883
f604c2a2
L		 5884 count = 0;
5885 for (j = 0; plts[j].name != NULL; j++)
5886 {
5887 plt = bfd_get_section_by_name (abfd, plts[j].name);
90efb642 5888 if (plt == NULL || plt->size == 0)
6f25f223 5889 continue;
533d0af0 5890
f604c2a2
L		 5891 /* Get the PLT section contents. */
5892 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5893 if (plt_contents == NULL)
5894 break;
5895 if (!bfd_get_section_contents (abfd, (asection *) plt,
5896 plt_contents, 0, plt->size))
5897 {
5898 free (plt_contents);
5899 break;
5900 }
5901
5902 /* Check what kind of PLT it is. */
5903 plt_type = plt_unknown;
90efb642
L		 5904 if (plts[j].type == plt_unknown
5905 && (plt->size >= (lazy_plt->plt0_entry_size
5906 + lazy_plt->plt_entry_size)))
f604c2a2
L		 5907 {
5908 /* Match lazy PLT first. */
5909 if (memcmp (plt_contents, lazy_plt->plt0_entry,
5910 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 5911 {
5912 /* The fist entry in the lazy IBT PLT is the same as the
5913 normal lazy PLT. */
5914 if (lazy_ibt_plt != NULL
90efb642 5915 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 5916 lazy_ibt_plt->plt_entry,
5917 lazy_ibt_plt->plt_got_offset) == 0))
5918 plt_type = plt_lazy | plt_second;
5919 else
5920 plt_type = plt_lazy;
5921 }
f604c2a2
L		 5922 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
5923 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 5924 {
5925 /* The fist entry in the PIC lazy IBT PLT is the same as
5926 the normal PIC lazy PLT. */
5927 if (lazy_ibt_plt != NULL
90efb642 5928 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 5929 lazy_ibt_plt->pic_plt_entry,
5930 lazy_ibt_plt->plt_got_offset) == 0))
5931 plt_type = plt_lazy | plt_pic | plt_second;
5932 else
5933 plt_type = plt_lazy | plt_pic;
5934 }
f604c2a2
L		 5935 }
5936
5937 if (non_lazy_plt != NULL
90efb642
L		 5938 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5939 && plt->size >= non_lazy_plt->plt_entry_size)
f604c2a2
L		 5940 {
5941 /* Match non-lazy PLT. */
5942 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5943 non_lazy_plt->plt_got_offset) == 0)
5944 plt_type = plt_non_lazy;
5945 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
5946 non_lazy_plt->plt_got_offset) == 0)
5947 plt_type = plt_pic;
5948 }
5949
ee2fdd6f 5950 if ((non_lazy_ibt_plt != NULL)
90efb642
L		 5951 && (plt_type == plt_unknown || plt_type == plt_second)
5952 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
ee2fdd6f
L		 5953 {
5954 if (memcmp (plt_contents,
5955 non_lazy_ibt_plt->plt_entry,
5956 non_lazy_ibt_plt->plt_got_offset) == 0)
5957 {
5958 /* Match IBT PLT. */
5959 plt_type = plt_second;
5960 non_lazy_plt = non_lazy_ibt_plt;
5961 }
5962 else if (memcmp (plt_contents,
5963 non_lazy_ibt_plt->pic_plt_entry,
5964 non_lazy_ibt_plt->plt_got_offset) == 0)
5965 {
5966 /* Match PIC IBT PLT. */
5967 plt_type = plt_second | plt_pic;
5968 non_lazy_plt = non_lazy_ibt_plt;
5969 }
5970 }
5971
f604c2a2 5972 if (plt_type == plt_unknown)
37c0b6ee
L		 5973 {
5974 free (plt_contents);
5975 continue;
5976 }
3972882e 5977
f604c2a2
L		 5978 plts[j].sec = plt;
5979 plts[j].type = plt_type;
ec1f73bb 5980
f604c2a2
L		 5981 if ((plt_type & plt_lazy))
5982 {
5983 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5984 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5985 /* Skip PLT0 in lazy PLT. */
5986 i = 1;
5987 }
5988 else
5989 {
5990 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5991 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5992 i = 0;
5993 }
fca6ae69 5994
ee2fdd6f
L		 5995 /* Skip lazy PLT when the second PLT is used. */
5996 if ((plt_type & (plt_lazy | plt_second))
5997 == (plt_lazy | plt_second))
5998 plts[j].count = 0;
5999 else
6000 {
6001 n = plt->size / plts[j].plt_entry_size;
6002 plts[j].count = n;
6003 count += n - i;
6004 }
f604c2a2
L		 6005
6006 plts[j].contents = plt_contents;
6007
6008 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
6009 if ((plt_type & plt_pic))
6010 got_addr = (bfd_vma) -1;
144bed8d
L		 6011 }
6012
90efb642
L		 6013 if (count == 0)
6014 return -1;
6015
37c0b6ee
L		 6016 dynrelbuf = (arelent **) bfd_malloc (relsize);
6017 if (dynrelbuf == NULL)
6018 return -1;
6019
6020 dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf,
6021 dynsyms);
6022
6023 /* Sort the relocs by address. */
0afcef53
L		 6024 qsort (dynrelbuf, dynrelcount, sizeof (arelent *),
6025 _bfd_x86_elf_compare_relocs);
37c0b6ee 6026
f604c2a2 6027 size = count * sizeof (asymbol);
98c5dfc9
L		 6028
6029 /* Allocate space for @plt suffixes. */
6030 n = 0;
6031 for (i = 0; i < dynrelcount; i++)
6032 {
6033 p = dynrelbuf[i];
6034 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
6035 if (p->addend != 0)
6036 size += sizeof ("+0x") - 1 + 8;
6037 }
6038
f604c2a2
L		 6039 s = *ret = (asymbol *) bfd_zmalloc (size);
6040 if (s == NULL)
823cb067 6041 goto bad_return;
3972882e 6042
f604c2a2
L		 6043 if (got_addr)
6044 {
6045 /* Check .got.plt and then .got to get the _GLOBAL_OFFSET_TABLE_
6046 address. */
6047 asection *sec = bfd_get_section_by_name (abfd, ".got.plt");
6048 if (sec != NULL)
6049 got_addr = sec->vma;
6050 else
6051 {
6052 sec = bfd_get_section_by_name (abfd, ".got");
6053 if (sec != NULL)
6054 got_addr = sec->vma;
6055 }
3972882e 6056
f604c2a2
L		 6057 if (got_addr == (bfd_vma) -1)
6058 goto bad_return;
6059 }
3972882e 6060
f604c2a2 6061 /* Check for each PLT section. */
98c5dfc9 6062 names = (char *) (s + count);
f604c2a2
L		 6063 size = 0;
6064 n = 0;
6065 for (j = 0; plts[j].name != NULL; j++)
6066 if ((plt_contents = plts[j].contents) != NULL)
6067 {
6068 long k;
6069 bfd_vma offset;
6070
6071 plt_got_offset = plts[j].plt_got_offset;
6072 plt_entry_size = plts[j].plt_entry_size;
6073
6074 plt = plts[j].sec;
6075
6076 if ((plts[j].type & plt_lazy))
6077 {
6078 /* Skip PLT0 in lazy PLT. */
6079 k = 1;
6080 offset = plt_entry_size;
6081 }
6082 else
6083 {
6084 k = 0;
6085 offset = 0;
6086 }
6087
6088 /* Check each PLT entry against dynamic relocations. */
6089 for (; k < plts[j].count; k++)
6090 {
6091 int off;
6092 bfd_vma got_vma;
6093 long min, max, mid;
f604c2a2
L		 6094
6095 /* Get the GOT offset, a signed 32-bit integer. */
6096 off = H_GET_32 (abfd, (plt_contents + offset
6097 + plt_got_offset));
6098 got_vma = got_addr + off;
6099
6100 /* Binary search. */
6101 p = dynrelbuf[0];
6102 min = 0;
6103 max = dynrelcount;
6104 while ((min + 1) < max)
6105 {
6106 arelent *r;
6107
6108 mid = (min + max) / 2;
6109 r = dynrelbuf[mid];
6110 if (got_vma > r->address)
6111 min = mid;
6112 else if (got_vma < r->address)
6113 max = mid;
6114 else
6115 {
6116 p = r;
6117 break;
6118 }
6119 }
6120
6121 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6122 if (got_vma == p->address
6123 && p->howto != NULL
6124 && (p->howto->type == R_386_JUMP_SLOT
6125 || p->howto->type == R_386_GLOB_DAT
6126 || p->howto->type == R_386_IRELATIVE))
6127 {
6128 *s = **p->sym_ptr_ptr;
6129 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6130 set. Since we are defining a symbol, ensure one
6131 of them is set. */
6132 if ((s->flags & BSF_LOCAL) == 0)
6133 s->flags |= BSF_GLOBAL;
6134 s->flags |= BSF_SYNTHETIC;
6135 /* This is no longer a section symbol. */
6136 s->flags &= ~BSF_SECTION_SYM;
6137 s->section = plt;
6138 s->the_bfd = plt->owner;
6139 s->value = offset;
98c5dfc9
L		 6140 s->udata.p = NULL;
6141 s->name = names;
6142 len = strlen ((*p->sym_ptr_ptr)->name);
6143 memcpy (names, (*p->sym_ptr_ptr)->name, len);
6144 names += len;
f604c2a2 6145 if (p->addend != 0)
98c5dfc9
L		 6146 {
6147 char buf[30], *a;
6148
6149 memcpy (names, "+0x", sizeof ("+0x") - 1);
6150 names += sizeof ("+0x") - 1;
6151 bfd_sprintf_vma (abfd, buf, p->addend);
6152 for (a = buf; *a == '0'; ++a)
6153 ;
6154 size = strlen (a);
6155 memcpy (names, a, size);
6156 names += size;
6157 }
6158 memcpy (names, "@plt", sizeof ("@plt"));
6159 names += sizeof ("@plt");
f604c2a2
L		 6160 n++;
6161 s++;
6162 }
6163 offset += plt_entry_size;
6164 }
6165 }
6166
6167 /* PLT entries with R_386_TLS_DESC relocations are skipped. */
6168 if (n == 0)
823cb067
L		 6169 {
6170bad_return:
6171 count = -1;
6172 }
6173 else
6174 count = n;
f604c2a2 6175
f604c2a2
L		 6176 for (j = 0; plts[j].name != NULL; j++)
6177 if (plts[j].contents != NULL)
6178 free (plts[j].contents);
6179
6180 free (dynrelbuf);
6181
6182 return count;
4c45e5c9
JJ		 6183}
6184
f604c2a2
L		 6185/* Set up i386 GNU properties. Return the first relocatable ELF input
6186 with GNU properties if found. Otherwise, return NULL. */
6187
6188static bfd *
6189elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
6190{
6191 bfd_boolean normal_target;
ee2fdd6f 6192 bfd_boolean lazy_plt;
f604c2a2
L		 6193 asection *sec, *pltsec;
6194 bfd *dynobj;
ee2fdd6f
L		 6195 bfd_boolean use_ibt_plt;
6196 unsigned int plt_alignment, features;
0afcef53 6197 struct elf_x86_link_hash_table *htab;
ee2fdd6f 6198 bfd *pbfd;
73784fa5
L		 6199 bfd *ebfd = NULL;
6200 elf_property *prop;
0afcef53
L		 6201 struct elf_i386_plt_layout *plt_layout;
6202 const struct elf_i386_lazy_plt_layout *lazy_plt_layout;
6203 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt_layout;
ee2fdd6f
L		 6204
6205 features = 0;
6206 if (info->ibt)
6207 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
48580982
L		 6208 if (info->shstk)
6209 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
ee2fdd6f 6210
73784fa5
L		 6211 /* Find a normal input file with GNU property note. */
6212 for (pbfd = info->input_bfds;
6213 pbfd != NULL;
6214 pbfd = pbfd->link.next)
6215 if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
6216 && bfd_count_sections (pbfd) != 0)
6217 {
6218 ebfd = pbfd;
ee2fdd6f 6219
73784fa5
L		 6220 if (elf_properties (pbfd) != NULL)
6221 break;
6222 }
6223
a5b4ee94 6224 if (ebfd != NULL && features)
73784fa5 6225 {
a5b4ee94
L		 6226 /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and
6227 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
6228 prop = _bfd_elf_get_property (ebfd,
6229 GNU_PROPERTY_X86_FEATURE_1_AND,
6230 4);
6231 prop->u.number |= features;
6232 prop->pr_kind = property_number;
6233
6234 /* Create the GNU property note section if needed. */
6235 if (pbfd == NULL)
ee2fdd6f 6236 {
a5b4ee94
L		 6237 sec = bfd_make_section_with_flags (ebfd,
6238 NOTE_GNU_PROPERTY_SECTION_NAME,
6239 (SEC_ALLOC
6240 | SEC_LOAD
6241 | SEC_IN_MEMORY
6242 | SEC_READONLY
6243 | SEC_HAS_CONTENTS
6244 | SEC_DATA));
6245 if (sec == NULL)
6246 info->callbacks->einfo (_("%F: failed to create GNU property section\n"));
ee2fdd6f 6247
a5b4ee94
L		 6248 if (!bfd_set_section_alignment (ebfd, sec, 2))
6249 {
73784fa5 6250error_alignment:
a5b4ee94
L		 6251 info->callbacks->einfo (_("%F%A: failed to align section\n"),
6252 sec);
73784fa5 6253 }
73784fa5 6254
a5b4ee94
L		 6255 elf_section_type (sec) = SHT_NOTE;
6256 }
ee2fdd6f
L		 6257 }
6258
6259 pbfd = _bfd_elf_link_setup_gnu_properties (info);
f604c2a2
L		 6260
6261 if (bfd_link_relocatable (info))
6262 return pbfd;
6263
0afcef53 6264 htab = elf_x86_hash_table (info, I386_ELF_DATA);
f604c2a2
L		 6265 if (htab == NULL)
6266 return pbfd;
6267
ee2fdd6f
L		 6268 use_ibt_plt = info->ibtplt || info->ibt;
6269 if (!use_ibt_plt && pbfd != NULL)
6270 {
6271 /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */
6272 elf_property_list *p;
6273
6274 /* The property list is sorted in order of type. */
6275 for (p = elf_properties (pbfd); p; p = p->next)
6276 {
6277 if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type)
6278 {
6279 use_ibt_plt = !!(p->property.u.number
6280 & GNU_PROPERTY_X86_FEATURE_1_IBT);
6281 break;
6282 }
6283 else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type)
6284 break;
6285 }
6286 }
6287
f604c2a2
L		 6288 dynobj = htab->elf.dynobj;
6289
6290 /* Set htab->elf.dynobj here so that there is no need to check and
6291 set it in check_relocs. */
6292 if (dynobj == NULL)
6293 {
b7a18930
NC		 6294 if (pbfd != NULL)
6295 {
6296 htab->elf.dynobj = pbfd;
6297 dynobj = pbfd;
6298 }
6299 else
6300 {
6301 bfd *abfd;
6302
6303 /* Find a normal input file to hold linker created
6304 sections. */
6305 for (abfd = info->input_bfds;
6306 abfd != NULL;
6307 abfd = abfd->link.next)
6308 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
6309 && (abfd->flags
6310 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
6311 {
6312 htab->elf.dynobj = abfd;
6313 dynobj = abfd;
6314 break;
6315 }
6316 }
f604c2a2
L		 6317 }
6318
0afcef53
L		 6319 plt_layout = &elf_i386_plt (htab);
6320
f604c2a2
L		 6321 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
6322 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
6323 canonical function address. */
0afcef53 6324 plt_layout->has_plt0 = 1;
f604c2a2
L		 6325 normal_target = FALSE;
6326
6327 switch (get_elf_i386_backend_data (info->output_bfd)->os)
6328 {
6329 case is_normal:
ee2fdd6f
L		 6330 if (use_ibt_plt)
6331 {
0afcef53
L		 6332 elf_i386_lazy_plt (htab) = &elf_i386_lazy_ibt_plt;
6333 elf_i386_non_lazy_plt (htab) = &elf_i386_non_lazy_ibt_plt;
ee2fdd6f
L		 6334 }
6335 else
6336 {
0afcef53
L		 6337 elf_i386_lazy_plt (htab) = &elf_i386_lazy_plt;
6338 elf_i386_non_lazy_plt (htab) = &elf_i386_non_lazy_plt;
ee2fdd6f 6339 }
f604c2a2
L		 6340 normal_target = TRUE;
6341 break;
6342 case is_vxworks:
0afcef53
L		 6343 elf_i386_lazy_plt (htab) = &elf_i386_lazy_plt;
6344 elf_i386_non_lazy_plt (htab) = NULL;
f604c2a2 6345 if (!elf_vxworks_create_dynamic_sections (dynobj, info,
0afcef53 6346 &elf_i386_srelplt2 (htab)))
f604c2a2
L		 6347 info->callbacks->einfo (_("%F: failed to create VxWorks dynamic sections\n"));
6348 break;
6349 case is_nacl:
0afcef53
L		 6350 elf_i386_lazy_plt (htab) = &elf_i386_nacl_plt;
6351 elf_i386_non_lazy_plt (htab) = NULL;
f604c2a2
L		 6352 break;
6353 }
6354
0afcef53
L		 6355 lazy_plt_layout = elf_i386_lazy_plt (htab);
6356 non_lazy_plt_layout = elf_i386_non_lazy_plt (htab);
6357
f604c2a2
L		 6358 pltsec = htab->elf.splt;
6359
6360 /* If the non-lazy PLT is available, use it for all PLT entries if
6361 there are no PLT0 or no .plt section. */
0afcef53
L		 6362 if (non_lazy_plt_layout != NULL
6363 && (!plt_layout->has_plt0 || pltsec == NULL))
f604c2a2 6364 {
ee2fdd6f 6365 lazy_plt = FALSE;
f604c2a2 6366 if (bfd_link_pic (info))
0afcef53
L		 6367 plt_layout->plt_entry
6368 = non_lazy_plt_layout->pic_plt_entry;
f604c2a2 6369 else
0afcef53
L		 6370 plt_layout->plt_entry
6371 = non_lazy_plt_layout->plt_entry;
6372 plt_layout->plt_entry_size
6373 = non_lazy_plt_layout->plt_entry_size;
6374 plt_layout->plt_got_offset
6375 = non_lazy_plt_layout->plt_got_offset;
6376 plt_layout->eh_frame_plt_size
6377 = non_lazy_plt_layout->eh_frame_plt_size;
6378 plt_layout->eh_frame_plt
6379 = non_lazy_plt_layout->eh_frame_plt;
f604c2a2
L		 6380 }
6381 else
6382 {
ee2fdd6f 6383 lazy_plt = TRUE;
f604c2a2
L		 6384 if (bfd_link_pic (info))
6385 {
0afcef53
L		 6386 plt_layout->plt0_entry
6387 = lazy_plt_layout->pic_plt0_entry;
6388 plt_layout->plt_entry
6389 = lazy_plt_layout->pic_plt_entry;
f604c2a2
L		 6390 }
6391 else
6392 {
0afcef53
L		 6393 plt_layout->plt0_entry
6394 = lazy_plt_layout->plt0_entry;
6395 plt_layout->plt_entry
6396 = lazy_plt_layout->plt_entry;
f604c2a2 6397 }
0afcef53
L		 6398 plt_layout->plt_entry_size
6399 = lazy_plt_layout->plt_entry_size;
6400 plt_layout->plt_got_offset
6401 = lazy_plt_layout->plt_got_offset;
6402 plt_layout->eh_frame_plt_size
6403 = lazy_plt_layout->eh_frame_plt_size;
6404 plt_layout->eh_frame_plt
6405 = lazy_plt_layout->eh_frame_plt;
f604c2a2
L		 6406 }
6407
6408 /* Return if there are no normal input files. */
6409 if (dynobj == NULL)
6410 return pbfd;
6411
6412 /* Since create_dynamic_sections isn't always called, but GOT
b7a18930 6413 relocations need GOT sections, create them here so that we
f604c2a2
L		 6414 don't need to do it in check_relocs. */
6415 if (htab->elf.sgot == NULL
6416 && !_bfd_elf_create_got_section (dynobj, info))
6417 info->callbacks->einfo (_("%F: failed to create GOT sections\n"));
6418
6419 /* Create the ifunc sections here so that check_relocs can be
6420 simplified. */
6421 if (!_bfd_elf_create_ifunc_sections (dynobj, info))
6422 info->callbacks->einfo (_("%F: failed to create ifunc sections\n"));
6423
0afcef53 6424 plt_alignment = bfd_log2 (plt_layout->plt_entry_size);
f604c2a2
L		 6425
6426 if (pltsec != NULL)
6427 {
6428 /* Whe creating executable, set the contents of the .interp
6429 section to the interpreter. */
6430 if (bfd_link_executable (info) && !info->nointerp)
6431 {
6432 asection *s = bfd_get_linker_section (dynobj, ".interp");
6433 if (s == NULL)
6434 abort ();
0afcef53
L		 6435 s->size = htab->dynamic_interpreter_size;
6436 s->contents = (unsigned char *) htab->dynamic_interpreter;
f604c2a2
L		 6437 htab->interp = s;
6438 }
6439
6440 /* Don't change PLT section alignment for NaCl since it uses
6441 64-byte PLT entry and sets PLT section alignment to 32
6442 bytes. */
6443 if (normal_target)
6444 {
6445 const struct elf_backend_data *bed
6446 = get_elf_backend_data (dynobj);
6447 flagword pltflags = (bed->dynamic_sec_flags
6448 | SEC_ALLOC
6449 | SEC_CODE
6450 | SEC_LOAD
6451 | SEC_READONLY);
6452 unsigned int non_lazy_plt_alignment
0afcef53 6453 = bfd_log2 (non_lazy_plt_layout->plt_entry_size);
f604c2a2
L		 6454
6455 sec = pltsec;
6456 if (!bfd_set_section_alignment (sec->owner, sec,
6457 plt_alignment))
6458 goto error_alignment;
6459
6460 /* Create the GOT procedure linkage table. */
6461 sec = bfd_make_section_anyway_with_flags (dynobj,
6462 ".plt.got",
6463 pltflags);
6464 if (sec == NULL)
6465 info->callbacks->einfo (_("%F: failed to create GOT PLT section\n"));
6466
6467 if (!bfd_set_section_alignment (dynobj, sec,
6468 non_lazy_plt_alignment))
6469 goto error_alignment;
6470
6471 htab->plt_got = sec;
ee2fdd6f
L		 6472
6473 if (lazy_plt)
6474 {
6475 sec = NULL;
6476
6477 if (use_ibt_plt)
6478 {
6479 /* Create the second PLT for Intel IBT support. IBT
6480 PLT is supported only for non-NaCl target and is
6481 is needed only for lazy binding. */
6482 sec = bfd_make_section_anyway_with_flags (dynobj,
6483 ".plt.sec",
6484 pltflags);
6485 if (sec == NULL)
6486 info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n"));
6487
6488 if (!bfd_set_section_alignment (dynobj, sec,
6489 plt_alignment))
6490 goto error_alignment;
6491 }
6492
6493 htab->plt_second = sec;
6494 }
f604c2a2
L		 6495 }
6496
6497 if (!info->no_ld_generated_unwind_info)
6498 {
6499 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
6500 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
6501 | SEC_LINKER_CREATED);
6502
6503 sec = bfd_make_section_anyway_with_flags (dynobj,
6504 ".eh_frame",
6505 flags);
6506 if (sec == NULL)
6507 info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n"));
6508
6509 if (!bfd_set_section_alignment (dynobj, sec, 2))
6510 goto error_alignment;
6511
6512 htab->plt_eh_frame = sec;
6513
6514 if (htab->plt_got != NULL)
6515 {
6516 sec = bfd_make_section_anyway_with_flags (dynobj,
6517 ".eh_frame",
6518 flags);
6519 if (sec == NULL)
6520 info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
6521
6522 if (!bfd_set_section_alignment (dynobj, sec, 2))
6523 goto error_alignment;
6524
6525 htab->plt_got_eh_frame = sec;
6526 }
6527 }
6528 }
6529
6530 if (normal_target)
6531 {
6532 /* The .iplt section is used for IFUNC symbols in static
6533 executables. */
6534 sec = htab->elf.iplt;
6535 if (sec != NULL
6536 && !bfd_set_section_alignment (sec->owner, sec,
6537 plt_alignment))
73784fa5 6538 goto error_alignment;
f604c2a2
L		 6539 }
6540
6541 return pbfd;
6542}
6543
6d00b590 6544#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 6545#define TARGET_LITTLE_NAME "elf32-i386"
6546#define ELF_ARCH bfd_arch_i386
ae95ffa6 6547#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 6548#define ELF_MACHINE_CODE EM_386
6549#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 6550
6551#define elf_backend_can_gc_sections 1
51b64d56 6552#define elf_backend_can_refcount 1
252b5132
RH		 6553#define elf_backend_want_got_plt 1
6554#define elf_backend_plt_readonly 1
6555#define elf_backend_want_plt_sym 0
6556#define elf_backend_got_header_size 12
e41b3a13 6557#define elf_backend_plt_alignment 4
64f52338 6558#define elf_backend_dtrel_excludes_plt 1
f7483970 6559#define elf_backend_extern_protected_data 1
bedfd056 6560#define elf_backend_caches_rawsize 1
5474d94f 6561#define elf_backend_want_dynrelro 1
252b5132 6562
8c29f035
AM		 6563/* Support RELA for objdump of prelink objects. */
6564#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 6565#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
6566
13ae64f3 6567#define bfd_elf32_mkobject elf_i386_mkobject
13ae64f3 6568
dd5724d5
AM		 6569#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
6570#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
6571#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 6572#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 6573#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5
AM		 6574
6575#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
13285a1b 6576#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 6577#define elf_backend_check_relocs elf_i386_check_relocs
f604c2a2 6578#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
0ac8d2ca 6579#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 6580#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
6581#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
233cc9c1 6582#define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
dd5724d5 6583#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
c5fccbec
DJ		 6584#define elf_backend_grok_prstatus elf_i386_grok_prstatus
6585#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 6586#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 6587#define elf_backend_relocate_section elf_i386_relocate_section
6588#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
f604c2a2 6589#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
dd5724d5 6590
252b5132 6591#include "elf32-target.h"
2bc3c89a
AM		 6592
6593/* FreeBSD support. */
6594
6595#undef TARGET_LITTLE_SYM
6d00b590 6596#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 6597#undef TARGET_LITTLE_NAME
6598#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 6599#undef ELF_OSABI
6600#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 6601
6602/* The kernel recognizes executables as valid only if they carry a
6603 "FreeBSD" label in the ELF header. So we put this label on all
6604 executables and (for simplicity) also all other object files. */
6605
2bc3c89a 6606static void
d8045f23 6607elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 6608{
78245035 6609 _bfd_elf_post_process_headers (abfd, info);
2bc3c89a 6610
2bc3c89a 6611#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 6612 {
6613 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6614 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
6615 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
6616 }
caf47ea6 6617#endif
2bc3c89a
AM		 6618}
6619
6620#undef elf_backend_post_process_headers
d8045f23 6621#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC		 6622#undef elf32_bed
6623#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 6624
d8045f23
NC		 6625#undef elf_backend_add_symbol_hook
6626
2bc3c89a 6627#include "elf32-target.h"
eac338cf 6628
a6cc6b3b
RO		 6629/* Solaris 2. */
6630
6631#undef TARGET_LITTLE_SYM
6d00b590 6632#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO		 6633#undef TARGET_LITTLE_NAME
6634#define TARGET_LITTLE_NAME "elf32-i386-sol2"
6635
914082d1
L		 6636#undef elf_backend_post_process_headers
6637
a6cc6b3b
RO		 6638/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6639 objects won't be recognized. */
6640#undef ELF_OSABI
6641
6642#undef elf32_bed
6643#define elf32_bed elf32_i386_sol2_bed
6644
7dc98aea
RO		 6645/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6646 boundary. */
84865015 6647#undef elf_backend_static_tls_alignment
7dc98aea
RO		 6648#define elf_backend_static_tls_alignment 8
6649
a6cc6b3b
RO		 6650/* The Solaris 2 ABI requires a plt symbol on all platforms.
6651
6652 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6653 File, p.63. */
84865015 6654#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 6655#define elf_backend_want_plt_sym 1
6656
84865015
NC		 6657#undef elf_backend_strtab_flags
6658#define elf_backend_strtab_flags SHF_STRINGS
6659
5522f910
NC		 6660/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
6661 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
6662 FALSE otherwise. ISECTION is the best guess matching section from the
6663 input bfd IBFD, but it might be NULL. */
6664
84865015 6665static bfd_boolean
5522f910
NC		 6666elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
6667 bfd *obfd ATTRIBUTE_UNUSED,
6668 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
6669 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 6670{
6671 /* PR 19938: FIXME: Need to add code for setting the sh_info
5522f910
NC		 6672 and sh_link fields of Solaris specific section types. */
6673 return FALSE;
84865015 6674
5522f910 6675 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
84865015
NC		 6676 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6677
6678http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6679
6680 The following values should be set:
6681
6682Type Link Info
6683-----------------------------------------------------------------------------
6684SHT_SUNW_ancillary The section header index of 0
6685 [0x6fffffee] the associated string table.
6686
6687SHT_SUNW_capinfo The section header index of For a dynamic object, the
6688 [0x6ffffff0] the associated symbol table. section header index of
6689 the associated
6690 SHT_SUNW_capchain table,
6691 otherwise 0.
6692
6693SHT_SUNW_symsort The section header index of 0
6694 [0x6ffffff1] the associated symbol table.
6695
6696SHT_SUNW_tlssort The section header index of 0
6697 [0x6ffffff2] the associated symbol table.
6698
6699SHT_SUNW_LDYNSYM The section header index of One greater than the
6700 [0x6ffffff3] the associated string table. symbol table index of the
6701 This index is the same string last local symbol,
6702 table used by the SHT_DYNSYM STB_LOCAL. Since
6703 section. SHT_SUNW_LDYNSYM only
6704 contains local symbols,
6705 sh_info is equivalent to
6706 the number of symbols in
6707 the table.
6708
6709SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6710 [0x6ffffff5] the section header index of to named strings, the
6711 the associated section header index of
6712 SHT_SUNW_capinfo table, the associated string
6713 otherwise 0. table, otherwise 0.
6714
6715SHT_SUNW_move The section header index of 0
6716 [0x6ffffffa] the associated symbol table.
6717
6718SHT_SUNW_COMDAT 0 0
6719 [0x6ffffffb]
6720
6721SHT_SUNW_syminfo The section header index of The section header index
6722 [0x6ffffffc] the associated symbol table. of the associated
6723 .dynamic section.
6724
6725SHT_SUNW_verdef The section header index of The number of version
6726 [0x6ffffffd] the associated string table. definitions within the
6727 section.
6728
6729SHT_SUNW_verneed The section header index of The number of version
6730 [0x6ffffffe] the associated string table. dependencies within the
6731 section.
6732
6733SHT_SUNW_versym The section header index of 0
6734 [0x6fffffff] the associated symbol table. */
84865015
NC		 6735}
6736
5522f910
NC		 6737#undef elf_backend_copy_special_section_fields
6738#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
84865015 6739
a6cc6b3b
RO		 6740#include "elf32-target.h"
6741
bf64a951
L		 6742/* Intel MCU support. */
6743
6744static bfd_boolean
6745elf32_iamcu_elf_object_p (bfd *abfd)
6746{
6747 /* Set the right machine number for an IAMCU elf32 file. */
6748 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
6749 return TRUE;
6750}
6751
6752#undef TARGET_LITTLE_SYM
6753#define TARGET_LITTLE_SYM iamcu_elf32_vec
6754#undef TARGET_LITTLE_NAME
6755#define TARGET_LITTLE_NAME "elf32-iamcu"
84865015 6756#undef ELF_ARCH
bf64a951
L		 6757#define ELF_ARCH bfd_arch_iamcu
6758
6759#undef ELF_MACHINE_CODE
6760#define ELF_MACHINE_CODE EM_IAMCU
6761
6762#undef ELF_OSABI
6763
6764#undef elf32_bed
6765#define elf32_bed elf32_iamcu_bed
6766
6767#undef elf_backend_object_p
6768#define elf_backend_object_p elf32_iamcu_elf_object_p
6769
6770#undef elf_backend_static_tls_alignment
6771
6772#undef elf_backend_want_plt_sym
6773#define elf_backend_want_plt_sym 0
6774
84865015 6775#undef elf_backend_strtab_flags
5522f910 6776#undef elf_backend_copy_special_section_fields
84865015 6777
bf64a951
L		 6778#include "elf32-target.h"
6779
6780/* Restore defaults. */
6781#undef ELF_ARCH
6782#define ELF_ARCH bfd_arch_i386
6783#undef ELF_MACHINE_CODE
6784#define ELF_MACHINE_CODE EM_386
6785
a27e4371
RM		 6786/* Native Client support. */
6787
6788#undef TARGET_LITTLE_SYM
6d00b590 6789#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 6790#undef TARGET_LITTLE_NAME
6791#define TARGET_LITTLE_NAME "elf32-i386-nacl"
6792#undef elf32_bed
6793#define elf32_bed elf32_i386_nacl_bed
6794
6795#undef ELF_MAXPAGESIZE
6796#define ELF_MAXPAGESIZE 0x10000
6797
6798/* Restore defaults. */
6799#undef ELF_OSABI
6800#undef elf_backend_want_plt_sym
6801#define elf_backend_want_plt_sym 0
6802#undef elf_backend_post_process_headers
a27e4371
RM		 6803#undef elf_backend_static_tls_alignment
6804
6805/* NaCl uses substantially different PLT entries for the same effects. */
6806
6807#undef elf_backend_plt_alignment
6808#define elf_backend_plt_alignment 5
6809#define NACL_PLT_ENTRY_SIZE 64
6810#define NACLMASK 0xe0 /* 32-byte alignment mask. */
6811
6812static const bfd_byte elf_i386_nacl_plt0_entry[] =
6813 {
6814 0xff, 0x35, /* pushl contents of address */
6815 0, 0, 0, 0, /* replaced with address of .got + 4. */
6816 0x8b, 0x0d, /* movl contents of address, %ecx */
6817 0, 0, 0, 0, /* replaced with address of .got + 8. */
6818 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6819 0xff, 0xe1 /* jmp *%ecx */
6820 };
6821
6822static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6823 {
6824 0x8b, 0x0d, /* movl contents of address, %ecx */
6825 0, 0, 0, 0, /* replaced with GOT slot address. */
6826 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6827 0xff, 0xe1, /* jmp *%ecx */
6828
6829 /* Pad to the next 32-byte boundary with nop instructions. */
6830 0x90,
6831 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6832 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6833
6834 /* Lazy GOT entries point here (32-byte aligned). */
6835 0x68, /* pushl immediate */
6836 0, 0, 0, 0, /* replaced with reloc offset. */
6837 0xe9, /* jmp relative */
6838 0, 0, 0, 0, /* replaced with offset to .plt. */
6839
6840 /* Pad to the next 32-byte boundary with nop instructions. */
6841 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6842 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6843 0x90, 0x90
6844 };
6845
6846static const bfd_byte
6847elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
6848 {
6849 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6850 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6851 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6852 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 6853
6854 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6855 so pad to that size with nop instructions. */
6856 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 6857 };
6858
6859static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
6860 {
6861 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6862 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6863 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6864 0xff, 0xe1, /* jmp *%ecx */
6865
6866 /* Pad to the next 32-byte boundary with nop instructions. */
6867 0x90,
6868 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6869 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6870
6871 /* Lazy GOT entries point here (32-byte aligned). */
6872 0x68, /* pushl immediate */
6873 0, 0, 0, 0, /* replaced with offset into relocation table. */
6874 0xe9, /* jmp relative */
6875 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6876
6877 /* Pad to the next 32-byte boundary with nop instructions. */
6878 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6879 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6880 0x90, 0x90
6881 };
6882
6883static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
6884 {
6885#if (PLT_CIE_LENGTH != 20 \
6886 || PLT_FDE_LENGTH != 36 \
6887 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6888 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6889# error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6890#endif
6891 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6892 0, 0, 0, 0, /* CIE ID */
6893 1, /* CIE version */
6894 'z', 'R', 0, /* Augmentation string */
6895 1, /* Code alignment factor */
6896 0x7c, /* Data alignment factor: -4 */
6897 8, /* Return address column */
6898 1, /* Augmentation size */
6899 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6900 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6901 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6902 DW_CFA_nop, DW_CFA_nop,
6903
6904 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6905 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
6906 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6907 0, 0, 0, 0, /* .plt size goes here */
6908 0, /* Augmentation size */
6909 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
6910 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6911 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
6912 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6913 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6914 13, /* Block length */
6915 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
6916 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
6917 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6918 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
6919 DW_CFA_nop, DW_CFA_nop
6920 };
6921
f604c2a2 6922static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt =
a27e4371
RM		 6923 {
6924 elf_i386_nacl_plt0_entry, /* plt0_entry */
6925 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
6926 2, /* plt0_got1_offset */
6927 8, /* plt0_got2_offset */
6928 elf_i386_nacl_plt_entry, /* plt_entry */
6929 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6930 2, /* plt_got_offset */
6931 33, /* plt_reloc_offset */
6932 38, /* plt_plt_offset */
6933 32, /* plt_lazy_offset */
6934 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6935 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6936 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
f604c2a2 6937 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
a27e4371
RM		 6938 };
6939
6940static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6941 {
f604c2a2
L		 6942 0x90, /* plt0_pad_byte: nop insn */
6943 is_nacl /* os */
a27e4371
RM		 6944 };
6945
64b384e1
RM		 6946static bfd_boolean
6947elf32_i386_nacl_elf_object_p (bfd *abfd)
6948{
6949 /* Set the right machine number for a NaCl i386 ELF32 file. */
6950 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6951 return TRUE;
6952}
6953
a27e4371
RM		 6954#undef elf_backend_arch_data
6955#define elf_backend_arch_data &elf_i386_nacl_arch_bed
6956
64b384e1
RM		 6957#undef elf_backend_object_p
6958#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 6959#undef elf_backend_modify_segment_map
6960#define elf_backend_modify_segment_map nacl_modify_segment_map
6961#undef elf_backend_modify_program_headers
6962#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 6963#undef elf_backend_final_write_processing
6964#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 6965
a27e4371
RM		 6966#include "elf32-target.h"
6967
5a68afcf 6968/* Restore defaults. */
64b384e1 6969#undef elf_backend_object_p
5a68afcf
RM		 6970#undef elf_backend_modify_segment_map
6971#undef elf_backend_modify_program_headers
887badb3 6972#undef elf_backend_final_write_processing
5a68afcf 6973
eac338cf
PB		 6974/* VxWorks support. */
6975
6976#undef TARGET_LITTLE_SYM
6d00b590 6977#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 6978#undef TARGET_LITTLE_NAME
6979#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 6980#undef ELF_OSABI
1587442d
L		 6981#undef ELF_MAXPAGESIZE
6982#define ELF_MAXPAGESIZE 0x1000
a27e4371
RM		 6983#undef elf_backend_plt_alignment
6984#define elf_backend_plt_alignment 4
eac338cf 6985
23209a78
RM		 6986static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6987 {
6988 0x90, /* plt0_pad_byte */
f604c2a2 6989 is_vxworks /* os */
23209a78 6990 };
eac338cf 6991
23209a78
RM		 6992#undef elf_backend_arch_data
6993#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 6994
13285a1b 6995#undef elf_backend_relocs_compatible
eac338cf
PB		 6996#undef elf_backend_add_symbol_hook
6997#define elf_backend_add_symbol_hook \
6998 elf_vxworks_add_symbol_hook
6999#undef elf_backend_link_output_symbol_hook
7000#define elf_backend_link_output_symbol_hook \
9c72ff84 7001 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 7002#undef elf_backend_emit_relocs
7003#define elf_backend_emit_relocs elf_vxworks_emit_relocs
7004#undef elf_backend_final_write_processing
7005#define elf_backend_final_write_processing \
7006 elf_vxworks_final_write_processing
7dc98aea 7007#undef elf_backend_static_tls_alignment
eac338cf
PB		 7008
7009/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7010 define it. */
7011#undef elf_backend_want_plt_sym
7012#define elf_backend_want_plt_sym 1
7013
7014#undef elf32_bed
7015#define elf32_bed elf32_i386_vxworks_bed
7016
7017#include "elf32-target.h"
GDB Binutils - Deliverables
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