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x86: Add _bfd_x86_elf_gc_mark_hook
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
CommitLineData
252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
2571583a 2 Copyright (C) 1993-2017 Free Software Foundation, Inc.
252b5132 3
571fe01f 4 This file is part of BFD, the Binary File Descriptor library.
252b5132 5
571fe01f
NC		 6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
cd123cb7 8 the Free Software Foundation; either version 3 of the License, or
571fe01f 9 (at your option) any later version.
252b5132 10
571fe01f
NC		 11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
252b5132 15
571fe01f
NC		 16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
cd123cb7
NC		 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
252b5132 20
0afcef53 21#include "elfxx-x86.h"
5a68afcf 22#include "elf-nacl.h"
eac338cf 23#include "elf-vxworks.h"
e41b3a13 24#include "dwarf2.h"
02a86693 25#include "opcode/i386.h"
252b5132 26
55fd94b0
AM		 27/* 386 uses REL relocations instead of RELA. */
28#define USE_REL 1
252b5132
RH		 29
30#include "elf/i386.h"
31
32static reloc_howto_type elf_howto_table[]=
33{
6346d5ca 34 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
1b452ec6 35 bfd_elf_generic_reloc, "R_386_NONE",
b34976b6
AM		 36 TRUE, 0x00000000, 0x00000000, FALSE),
37 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 38 bfd_elf_generic_reloc, "R_386_32",
b34976b6
AM		 39 TRUE, 0xffffffff, 0xffffffff, FALSE),
40 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 41 bfd_elf_generic_reloc, "R_386_PC32",
b34976b6
AM		 42 TRUE, 0xffffffff, 0xffffffff, TRUE),
43 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 44 bfd_elf_generic_reloc, "R_386_GOT32",
b34976b6
AM		 45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 47 bfd_elf_generic_reloc, "R_386_PLT32",
b34976b6
AM		 48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 50 bfd_elf_generic_reloc, "R_386_COPY",
b34976b6
AM		 51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 53 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
b34976b6
AM		 54 TRUE, 0xffffffff, 0xffffffff, FALSE),
55 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 56 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
b34976b6
AM		 57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 59 bfd_elf_generic_reloc, "R_386_RELATIVE",
b34976b6
AM		 60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 62 bfd_elf_generic_reloc, "R_386_GOTOFF",
b34976b6
AM		 63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 65 bfd_elf_generic_reloc, "R_386_GOTPC",
b34976b6 66 TRUE, 0xffffffff, 0xffffffff, TRUE),
1b452ec6 67
dc47f327
AM		 68 /* We have a gap in the reloc numbers here.
69 R_386_standard counts the number up to this point, and
70 R_386_ext_offset is the value to subtract from a reloc type of
71 R_386_16 thru R_386_PC8 to form an index into this table. */
55fd94b0
AM		 72#define R_386_standard (R_386_GOTPC + 1)
73#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
1b452ec6 74
37e55690 75 /* These relocs are a GNU extension. */
b34976b6 76 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 77 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
b34976b6
AM		 78 TRUE, 0xffffffff, 0xffffffff, FALSE),
79 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 80 bfd_elf_generic_reloc, "R_386_TLS_IE",
b34976b6
AM		 81 TRUE, 0xffffffff, 0xffffffff, FALSE),
82 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 83 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
b34976b6
AM		 84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 86 bfd_elf_generic_reloc, "R_386_TLS_LE",
b34976b6
AM		 87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 89 bfd_elf_generic_reloc, "R_386_TLS_GD",
b34976b6
AM		 90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 92 bfd_elf_generic_reloc, "R_386_TLS_LDM",
b34976b6
AM		 93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
1b452ec6 95 bfd_elf_generic_reloc, "R_386_16",
b34976b6 96 TRUE, 0xffff, 0xffff, FALSE),
b0360d8c 97 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
1b452ec6 98 bfd_elf_generic_reloc, "R_386_PC16",
b34976b6
AM		 99 TRUE, 0xffff, 0xffff, TRUE),
100 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
1b452ec6 101 bfd_elf_generic_reloc, "R_386_8",
b34976b6
AM		 102 TRUE, 0xff, 0xff, FALSE),
103 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
1b452ec6 104 bfd_elf_generic_reloc, "R_386_PC8",
b34976b6 105 TRUE, 0xff, 0xff, TRUE),
dc47f327 106
55fd94b0
AM		 107#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
108#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
13ae64f3 109 /* These are common with Solaris TLS implementation. */
b34976b6 110 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 111 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
b34976b6
AM		 112 TRUE, 0xffffffff, 0xffffffff, FALSE),
113 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 114 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
b34976b6
AM		 115 TRUE, 0xffffffff, 0xffffffff, FALSE),
116 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 117 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
b34976b6
AM		 118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 120 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
b34976b6
AM		 121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 123 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
b34976b6
AM		 124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 126 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
b34976b6 127 TRUE, 0xffffffff, 0xffffffff, FALSE),
1788fc08
L		 128 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
129 bfd_elf_generic_reloc, "R_386_SIZE32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
67a4f2b7
AO		 131 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
136 FALSE, 0, 0, FALSE),
137 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_DESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
cbe950e9
L		 140 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_386_IRELATIVE",
142 TRUE, 0xffffffff, 0xffffffff, FALSE),
02a86693
L		 143 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_GOT32X",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
13ae64f3
JJ		 146
147 /* Another gap. */
02a86693 148#define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
c74be520 149#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
252b5132
RH		 150
151/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH		 152 HOWTO (R_386_GNU_VTINHERIT, /* type */
153 0, /* rightshift */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
155 0, /* bitsize */
b34976b6 156 FALSE, /* pc_relative */
252b5132
RH		 157 0, /* bitpos */
158 complain_overflow_dont, /* complain_on_overflow */
159 NULL, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
b34976b6 161 FALSE, /* partial_inplace */
252b5132
RH		 162 0, /* src_mask */
163 0, /* dst_mask */
b34976b6 164 FALSE), /* pcrel_offset */
252b5132
RH		 165
166/* GNU extension to record C++ vtable member usage. */
252b5132
RH		 167 HOWTO (R_386_GNU_VTENTRY, /* type */
168 0, /* rightshift */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
170 0, /* bitsize */
b34976b6 171 FALSE, /* pc_relative */
252b5132
RH		 172 0, /* bitpos */
173 complain_overflow_dont, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
b34976b6 176 FALSE, /* partial_inplace */
252b5132
RH		 177 0, /* src_mask */
178 0, /* dst_mask */
b34976b6 179 FALSE) /* pcrel_offset */
dc47f327 180
55fd94b0 181#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
dc47f327
AM		 182
183};
184
252b5132 185#ifdef DEBUG_GEN_RELOC
55fd94b0
AM		 186#define TRACE(str) \
187 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH		 188#else
189#define TRACE(str)
190#endif
191
192static reloc_howto_type *
55fd94b0
AM		 193elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
194 bfd_reloc_code_real_type code)
252b5132
RH		 195{
196 switch (code)
197 {
198 case BFD_RELOC_NONE:
199 TRACE ("BFD_RELOC_NONE");
55fd94b0 200 return &elf_howto_table[R_386_NONE];
252b5132
RH		 201
202 case BFD_RELOC_32:
203 TRACE ("BFD_RELOC_32");
55fd94b0 204 return &elf_howto_table[R_386_32];
252b5132
RH		 205
206 case BFD_RELOC_CTOR:
207 TRACE ("BFD_RELOC_CTOR");
55fd94b0 208 return &elf_howto_table[R_386_32];
252b5132
RH		 209
210 case BFD_RELOC_32_PCREL:
211 TRACE ("BFD_RELOC_PC32");
55fd94b0 212 return &elf_howto_table[R_386_PC32];
252b5132
RH		 213
214 case BFD_RELOC_386_GOT32:
215 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 216 return &elf_howto_table[R_386_GOT32];
252b5132
RH		 217
218 case BFD_RELOC_386_PLT32:
219 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 220 return &elf_howto_table[R_386_PLT32];
252b5132
RH		 221
222 case BFD_RELOC_386_COPY:
223 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 224 return &elf_howto_table[R_386_COPY];
252b5132
RH		 225
226 case BFD_RELOC_386_GLOB_DAT:
227 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 228 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH		 229
230 case BFD_RELOC_386_JUMP_SLOT:
231 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 232 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH		 233
234 case BFD_RELOC_386_RELATIVE:
235 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 236 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH		 237
238 case BFD_RELOC_386_GOTOFF:
239 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 240 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH		 241
242 case BFD_RELOC_386_GOTPC:
243 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 244 return &elf_howto_table[R_386_GOTPC];
252b5132 245
37e55690
JJ		 246 /* These relocs are a GNU extension. */
247 case BFD_RELOC_386_TLS_TPOFF:
248 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 249 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ		 250
251 case BFD_RELOC_386_TLS_IE:
252 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 253 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ		 254
255 case BFD_RELOC_386_TLS_GOTIE:
256 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 257 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 258
13ae64f3
JJ		 259 case BFD_RELOC_386_TLS_LE:
260 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 261 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ		 262
263 case BFD_RELOC_386_TLS_GD:
264 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 265 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ		 266
267 case BFD_RELOC_386_TLS_LDM:
268 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 269 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 270
252b5132
RH		 271 case BFD_RELOC_16:
272 TRACE ("BFD_RELOC_16");
55fd94b0 273 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH		 274
275 case BFD_RELOC_16_PCREL:
276 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 277 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH		 278
279 case BFD_RELOC_8:
280 TRACE ("BFD_RELOC_8");
55fd94b0 281 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH		 282
283 case BFD_RELOC_8_PCREL:
284 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 285 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 286
13ae64f3
JJ		 287 /* Common with Sun TLS implementation. */
288 case BFD_RELOC_386_TLS_LDO_32:
289 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 290 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ		 291
292 case BFD_RELOC_386_TLS_IE_32:
293 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 294 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ		 295
296 case BFD_RELOC_386_TLS_LE_32:
297 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 298 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ		 299
300 case BFD_RELOC_386_TLS_DTPMOD32:
301 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 302 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ		 303
304 case BFD_RELOC_386_TLS_DTPOFF32:
305 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 306 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ		 307
308 case BFD_RELOC_386_TLS_TPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 310 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 311
1788fc08
L		 312 case BFD_RELOC_SIZE32:
313 TRACE ("BFD_RELOC_SIZE32");
314 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
315
67a4f2b7
AO		 316 case BFD_RELOC_386_TLS_GOTDESC:
317 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
318 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
319
320 case BFD_RELOC_386_TLS_DESC_CALL:
321 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
322 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
323
324 case BFD_RELOC_386_TLS_DESC:
325 TRACE ("BFD_RELOC_386_TLS_DESC");
326 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
327
cbe950e9
L		 328 case BFD_RELOC_386_IRELATIVE:
329 TRACE ("BFD_RELOC_386_IRELATIVE");
2a750708 330 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
cbe950e9 331
02a86693
L		 332 case BFD_RELOC_386_GOT32X:
333 TRACE ("BFD_RELOC_386_GOT32X");
334 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
335
252b5132
RH		 336 case BFD_RELOC_VTABLE_INHERIT:
337 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 338 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH		 339
340 case BFD_RELOC_VTABLE_ENTRY:
341 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 342 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH		 343
344 default:
345 break;
346 }
347
348 TRACE ("Unknown");
349 return 0;
350}
351
157090f7
AM		 352static reloc_howto_type *
353elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
354 const char *r_name)
355{
356 unsigned int i;
357
358 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
359 if (elf_howto_table[i].name != NULL
360 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
361 return &elf_howto_table[i];
362
363 return NULL;
364}
365
142411ca
L		 366static reloc_howto_type *
367elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
252b5132 368{
dc47f327
AM		 369 unsigned int indx;
370
371 if ((indx = r_type) >= R_386_standard
372 && ((indx = r_type - R_386_ext_offset) - R_386_standard
373 >= R_386_ext - R_386_standard)
13ae64f3 374 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520
L		 375 >= R_386_ext2 - R_386_ext)
376 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
377 >= R_386_vt - R_386_ext2))
252b5132 378 {
695344c0 379 /* xgettext:c-format */
4eca0228
AM		 380 _bfd_error_handler (_("%B: invalid relocation type %d"),
381 abfd, (int) r_type);
55fd94b0 382 indx = R_386_NONE;
252b5132 383 }
06614111
NC		 384 /* PR 17512: file: 0f67f69d. */
385 if (elf_howto_table [indx].type != r_type)
386 return NULL;
142411ca
L		 387 return &elf_howto_table[indx];
388}
389
390static void
391elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
392 arelent *cache_ptr,
393 Elf_Internal_Rela *dst)
394{
395 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
396 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
252b5132
RH		 397}
398
399/* Return whether a symbol name implies a local label. The UnixWare
400 2.1 cc generates temporary symbols that start with .X, so we
401 recognize them here. FIXME: do other SVR4 compilers also use .X?.
402 If so, we should move the .X recognition into
403 _bfd_elf_is_local_label_name. */
404
b34976b6 405static bfd_boolean
55fd94b0 406elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH		 407{
408 if (name[0] == '.' && name[1] == 'X')
b34976b6 409 return TRUE;
252b5132
RH		 410
411 return _bfd_elf_is_local_label_name (abfd, name);
412}
413\f
38701953 414/* Support for core dump NOTE sections. */
61adc1a4 415
b34976b6 416static bfd_boolean
55fd94b0 417elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM		 418{
419 int offset;
eea6121a 420 size_t size;
38701953 421
61adc1a4 422 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 423 {
61adc1a4
NC		 424 int pr_version = bfd_get_32 (abfd, note->descdata);
425
426 if (pr_version != 1)
427 return FALSE;
428
429 /* pr_cursig */
228e534f 430 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
61adc1a4
NC		 431
432 /* pr_pid */
228e534f 433 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
61adc1a4
NC		 434
435 /* pr_reg */
436 offset = 28;
eea6121a 437 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC		 438 }
439 else
440 {
441 switch (note->descsz)
442 {
443 default:
444 return FALSE;
38701953 445
61adc1a4
NC		 446 case 144: /* Linux/i386 */
447 /* pr_cursig */
228e534f 448 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 449
61adc1a4 450 /* pr_pid */
228e534f 451 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
38701953 452
61adc1a4
NC		 453 /* pr_reg */
454 offset = 72;
eea6121a 455 size = 68;
38701953 456
61adc1a4
NC		 457 break;
458 }
38701953
AM		 459 }
460
461 /* Make a ".reg/999" section. */
462 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 463 size, note->descpos + offset);
38701953
AM		 464}
465
b34976b6 466static bfd_boolean
55fd94b0 467elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 468{
61adc1a4 469 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 470 {
61adc1a4
NC		 471 int pr_version = bfd_get_32 (abfd, note->descdata);
472
473 if (pr_version != 1)
b34976b6 474 return FALSE;
38701953 475
228e534f 476 elf_tdata (abfd)->core->program
61adc1a4 477 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
228e534f 478 elf_tdata (abfd)->core->command
61adc1a4
NC		 479 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
480 }
481 else
482 {
483 switch (note->descsz)
484 {
485 default:
486 return FALSE;
487
488 case 124: /* Linux/i386 elf_prpsinfo. */
228e534f 489 elf_tdata (abfd)->core->pid
261b8d08 490 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 491 elf_tdata (abfd)->core->program
61adc1a4 492 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 493 elf_tdata (abfd)->core->command
61adc1a4
NC		 494 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
495 }
38701953
AM		 496 }
497
498 /* Note that for some reason, a spurious space is tacked
499 onto the end of the args in some (at least one anyway)
500 implementations, so strip it off if it exists. */
38701953 501 {
228e534f 502 char *command = elf_tdata (abfd)->core->command;
38701953
AM		 503 int n = strlen (command);
504
505 if (0 < n && command[n - 1] == ' ')
506 command[n - 1] = '\0';
507 }
508
b34976b6 509 return TRUE;
38701953
AM		 510}
511\f
512/* Functions for the i386 ELF linker.
513
514 In order to gain some understanding of code in this file without
515 knowing all the intricate details of the linker, note the
516 following:
517
518 Functions named elf_i386_* are called by external routines, other
519 functions are only called locally. elf_i386_* functions appear
520 in this file more or less in the order in which they are called
521 from external routines. eg. elf_i386_check_relocs is called
522 early in the link process, elf_i386_finish_dynamic_sections is
523 one of the last functions. */
524
f604c2a2 525/* The size in bytes of an entry in the lazy procedure linkage table. */
252b5132 526
f604c2a2 527#define LAZY_PLT_ENTRY_SIZE 16
252b5132 528
f604c2a2
L		 529/* The size in bytes of an entry in the non-lazy procedure linkage
530 table. */
252b5132 531
f604c2a2
L		 532#define NON_LAZY_PLT_ENTRY_SIZE 8
533
534/* The first entry in an absolute lazy procedure linkage table looks
535 like this. See the SVR4 ABI i386 supplement to see how this works.
536 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
537
538static const bfd_byte elf_i386_lazy_plt0_entry[12] =
252b5132
RH		 539{
540 0xff, 0x35, /* pushl contents of address */
541 0, 0, 0, 0, /* replaced with address of .got + 4. */
542 0xff, 0x25, /* jmp indirect */
eac338cf 543 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 544};
545
f604c2a2
L		 546/* Subsequent entries in an absolute lazy procedure linkage table look
547 like this. */
252b5132 548
f604c2a2 549static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 550{
551 0xff, 0x25, /* jmp indirect */
552 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
553 0x68, /* pushl immediate */
554 0, 0, 0, 0, /* replaced with offset into relocation table. */
555 0xe9, /* jmp relative */
556 0, 0, 0, 0 /* replaced with offset to start of .plt. */
557};
558
f604c2a2
L		 559/* The first entry in a PIC lazy procedure linkage table look like
560 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
561 lazy_plt->plt0_pad_byte. */
252b5132 562
f604c2a2 563static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
252b5132
RH		 564{
565 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 566 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 567};
568
f604c2a2
L		 569/* Subsequent entries in a PIC lazy procedure linkage table look like
570 this. */
252b5132 571
f604c2a2 572static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 573{
574 0xff, 0xa3, /* jmp *offset(%ebx) */
575 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
576 0x68, /* pushl immediate */
577 0, 0, 0, 0, /* replaced with offset into relocation table. */
578 0xe9, /* jmp relative */
579 0, 0, 0, 0 /* replaced with offset to start of .plt. */
580};
581
f604c2a2 582/* Entries in the non-lazy procedure linkage table look like this. */
dd7e64d4 583
f604c2a2 584static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 585{
586 0xff, 0x25, /* jmp indirect */
587 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
588 0x66, 0x90 /* xchg %ax,%ax */
589};
590
f604c2a2
L		 591/* Entries in the PIC non-lazy procedure linkage table look like
592 this. */
dd7e64d4 593
f604c2a2 594static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 595{
596 0xff, 0xa3, /* jmp *offset(%ebx) */
597 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
598 0x66, 0x90 /* xchg %ax,%ax */
599};
600
ee2fdd6f
L		 601/* The first entry in an absolute IBT-enabled lazy procedure linkage
602 table looks like this. */
603
604static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
605{
606 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
607 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
608 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
609};
610
611/* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
612 table look like this. Subsequent entries for a PIC IBT-enabled lazy
613 procedure linkage table are the same. */
614
615static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
616{
617 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
618 0x68, 0, 0, 0, 0, /* pushl immediate */
619 0xe9, 0, 0, 0, 0, /* jmp relative */
620 0x66, 0x90 /* xchg %ax,%ax */
621};
622
623/* The first entry in a PIC IBT-enabled lazy procedure linkage table
624 look like. */
625
626static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
627{
628 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
629 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
630 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
631};
632
633/* Entries for branches with IBT-enabled in the absolute non-lazey
634 procedure linkage table look like this. They have the same size
635 as the lazy PLT entry. */
636
637static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
638{
639 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
640 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
641 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
642};
643
644/* Entries for branches with IBT-enabled in the PIC non-lazey procedure
645 linkage table look like this. They have the same size as the lazy
646 PLT entry. */
647
648static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
649{
650 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
651 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
652 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
653};
654
f604c2a2 655/* .eh_frame covering the lazy .plt section. */
e41b3a13 656
f604c2a2 657static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
e41b3a13
JJ		 658{
659#define PLT_CIE_LENGTH 20
660#define PLT_FDE_LENGTH 36
661#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
662#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
663 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
664 0, 0, 0, 0, /* CIE ID */
665 1, /* CIE version */
666 'z', 'R', 0, /* Augmentation string */
667 1, /* Code alignment factor */
668 0x7c, /* Data alignment factor */
669 8, /* Return address column */
670 1, /* Augmentation size */
671 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
672 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
673 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
674 DW_CFA_nop, DW_CFA_nop,
675
676 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
677 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
678 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
679 0, 0, 0, 0, /* .plt size goes here */
680 0, /* Augmentation size */
681 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
682 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
683 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
684 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
685 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
686 11, /* Block length */
687 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
688 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
689 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
28ede8be 690 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
e41b3a13
JJ		 691 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
692};
693
ee2fdd6f
L		 694/* .eh_frame covering the lazy .plt section with IBT-enabled. */
695
696static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
697{
698 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
699 0, 0, 0, 0, /* CIE ID */
700 1, /* CIE version */
701 'z', 'R', 0, /* Augmentation string */
702 1, /* Code alignment factor */
703 0x7c, /* Data alignment factor */
704 8, /* Return address column */
705 1, /* Augmentation size */
706 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
707 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
708 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
709 DW_CFA_nop, DW_CFA_nop,
710
711 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
712 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
713 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
714 0, 0, 0, 0, /* .plt size goes here */
715 0, /* Augmentation size */
716 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
717 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
718 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
719 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
720 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
721 11, /* Block length */
722 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
723 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
724 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
725 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
726 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
727};
728
f604c2a2 729/* .eh_frame covering the non-lazy .plt section. */
fff53dae 730
f604c2a2 731static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
fff53dae
L		 732{
733#define PLT_GOT_FDE_LENGTH 16
734 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
735 0, 0, 0, 0, /* CIE ID */
736 1, /* CIE version */
737 'z', 'R', 0, /* Augmentation string */
738 1, /* Code alignment factor */
739 0x7c, /* Data alignment factor */
740 8, /* Return address column */
741 1, /* Augmentation size */
742 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
743 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
744 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
745 DW_CFA_nop, DW_CFA_nop,
746
747 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
748 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
f604c2a2
L		 749 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
750 0, 0, 0, 0, /* non-lazy .plt size goes here */
fff53dae
L		 751 0, /* Augmentation size */
752 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
753};
754
25e762b9 755/* These are the standard parameters. */
765e526c 756static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
25e762b9 757 {
f604c2a2
L		 758 elf_i386_lazy_plt0_entry, /* plt0_entry */
759 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
f604c2a2
L		 760 elf_i386_lazy_plt_entry, /* plt_entry */
761 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
765e526c
L		 762 2, /* plt0_got1_offset */
763 8, /* plt0_got2_offset */
764 0, /* plt0_got2_insn_end */
25e762b9
RM		 765 2, /* plt_got_offset */
766 7, /* plt_reloc_offset */
767 12, /* plt_plt_offset */
765e526c
L		 768 0, /* plt_got_insn_size */
769 0, /* plt_plt_insn_end */
25e762b9 770 6, /* plt_lazy_offset */
f604c2a2
L		 771 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
772 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
773 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
774 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
775 };
776
765e526c 777static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
f604c2a2
L		 778 {
779 elf_i386_non_lazy_plt_entry, /* plt_entry */
780 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
781 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
782 2, /* plt_got_offset */
765e526c 783 0, /* plt_got_insn_size */
f604c2a2
L		 784 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
785 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
25e762b9 786 };
ee2fdd6f 787
765e526c 788static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
ee2fdd6f
L		 789 {
790 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
791 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
ee2fdd6f
L		 792 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
793 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
765e526c
L		 794 2, /* plt0_got1_offset */
795 8, /* plt0_got2_offset */
796 0, /* plt0_got2_insn_end */
ee2fdd6f
L		 797 4+2, /* plt_got_offset */
798 4+1, /* plt_reloc_offset */
799 4+6, /* plt_plt_offset */
765e526c
L		 800 0, /* plt_got_insn_size */
801 0, /* plt_plt_insn_end */
ee2fdd6f
L		 802 0, /* plt_lazy_offset */
803 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
804 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
805 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
806 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
807 };
808
765e526c 809static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
ee2fdd6f
L		 810 {
811 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
812 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
813 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
814 4+2, /* plt_got_offset */
765e526c 815 0, /* plt_got_insn_size */
ee2fdd6f
L		 816 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
817 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
818 };
25e762b9
RM		 819\f
820
eac338cf
PB		 821/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
822 for the PLTResolve stub and then for each PLT entry. */
823#define PLTRESOLVE_RELOCS_SHLIB 0
824#define PLTRESOLVE_RELOCS 2
825#define PLT_NON_JUMP_SLOT_RELOCS 2
826
23209a78
RM		 827/* Architecture-specific backend data for i386. */
828
829struct elf_i386_backend_data
830{
831 /* Value used to fill the unused bytes of the first PLT entry. */
832 bfd_byte plt0_pad_byte;
833
f604c2a2
L		 834 /* Target system. */
835 enum
836 {
837 is_normal,
838 is_vxworks,
839 is_nacl
840 } os;
23209a78
RM		 841};
842
843#define get_elf_i386_backend_data(abfd) \
844 ((const struct elf_i386_backend_data *) \
845 get_elf_backend_data (abfd)->arch_data)
846
847/* These are the standard parameters. */
848static const struct elf_i386_backend_data elf_i386_arch_bed =
849 {
850 0, /* plt0_pad_byte */
f604c2a2 851 is_normal /* os */
23209a78
RM		 852 };
853
854#define elf_backend_arch_data &elf_i386_arch_bed
855
0afcef53 856/* Values in tls_type of x86 ELF linker hash entry. */
37e55690
JJ		 857#define GOT_TLS_IE 4
858#define GOT_TLS_IE_POS 5
859#define GOT_TLS_IE_NEG 6
860#define GOT_TLS_IE_BOTH 7
67a4f2b7
AO		 861#define GOT_TLS_GDESC 8
862#define GOT_TLS_GD_BOTH_P(type) \
863 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
864#define GOT_TLS_GD_P(type) \
865 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
866#define GOT_TLS_GDESC_P(type) \
867 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
868#define GOT_TLS_GD_ANY_P(type) \
869 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
67a4f2b7 870
0ffa91dd
NC		 871#define is_i386_elf(bfd) \
872 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
873 && elf_tdata (bfd) != NULL \
4dfe6ac6 874 && elf_object_id (bfd) == I386_ELF_DATA)
0ffa91dd 875
67a4f2b7 876#define elf_i386_compute_jump_table_size(htab) \
998d811a 877 ((htab)->elf.srelplt->reloc_count * 4)
67a4f2b7 878
142411ca
L		 879/* Return TRUE if the TLS access code sequence support transition
880 from R_TYPE. */
881
882static bfd_boolean
bedfd056 883elf_i386_check_tls_transition (asection *sec,
142411ca
L		 884 bfd_byte *contents,
885 Elf_Internal_Shdr *symtab_hdr,
886 struct elf_link_hash_entry **sym_hashes,
887 unsigned int r_type,
888 const Elf_Internal_Rela *rel,
889 const Elf_Internal_Rela *relend)
13ae64f3 890{
6eaa7fb5 891 unsigned int val, type, reg;
142411ca
L		 892 unsigned long r_symndx;
893 struct elf_link_hash_entry *h;
894 bfd_vma offset;
6eaa7fb5 895 bfd_byte *call;
1d4af308 896 bfd_boolean indirect_call;
142411ca 897
142411ca 898 offset = rel->r_offset;
13ae64f3 899 switch (r_type)
142411ca
L		 900 {
901 case R_386_TLS_GD:
902 case R_386_TLS_LDM:
903 if (offset < 2 || (rel + 1) >= relend)
904 return FALSE;
905
6eaa7fb5
L		 906 indirect_call = FALSE;
907 call = contents + offset + 4;
908 val = *(call - 5);
909 type = *(call - 6);
142411ca
L		 910 if (r_type == R_386_TLS_GD)
911 {
09e8c3bf 912 /* Check transition from GD access model. Only
6eaa7fb5
L		 913 leal foo@tlsgd(,%ebx,1), %eax
914 call ___tls_get_addr@PLT
915 or
916 leal foo@tlsgd(%ebx) %eax
917 call ___tls_get_addr@PLT
918 nop
919 or
920 leal foo@tlsgd(%reg), %eax
921 call *___tls_get_addr@GOT(%reg)
922 which may be converted to
923 addr32 call ___tls_get_addr
142411ca 924 can transit to different access model. */
6eaa7fb5
L		 925 if ((offset + 10) > sec->size
926 || (type != 0x8d && type != 0x04))
142411ca
L		 927 return FALSE;
928
142411ca
L		 929 if (type == 0x04)
930 {
6eaa7fb5
L		 931 /* leal foo@tlsgd(,%ebx,1), %eax
932 call ___tls_get_addr@PLT */
142411ca
L		 933 if (offset < 3)
934 return FALSE;
935
6eaa7fb5
L		 936 if (*(call - 7) != 0x8d
937 || val != 0x1d
938 || call[0] != 0xe8)
142411ca
L		 939 return FALSE;
940 }
941 else
942 {
6eaa7fb5
L		 943 /* This must be
944 leal foo@tlsgd(%ebx), %eax
945 call ___tls_get_addr@PLT
946 nop
947 or
948 leal foo@tlsgd(%reg), %eax
949 call *___tls_get_addr@GOT(%reg)
950 which may be converted to
951 addr32 call ___tls_get_addr
952
953 %eax can't be used as the GOT base register since it
954 is used to pass parameter to ___tls_get_addr. */
955 reg = val & 7;
956 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca
L		 957 return FALSE;
958
6eaa7fb5
L		 959 indirect_call = call[0] == 0xff;
960 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
961 && !(call[0] == 0x67 && call[1] == 0xe8)
962 && !(indirect_call
963 && (call[1] & 0xf8) == 0x90
964 && (call[1] & 0x7) == reg))
142411ca
L		 965 return FALSE;
966 }
967 }
968 else
969 {
970 /* Check transition from LD access model. Only
6eaa7fb5
L		 971 leal foo@tlsldm(%ebx), %eax
972 call ___tls_get_addr@PLT
973 or
974 leal foo@tlsldm(%reg), %eax
975 call *___tls_get_addr@GOT(%reg)
976 which may be converted to
977 addr32 call ___tls_get_addr
142411ca
L		 978 can transit to different access model. */
979 if (type != 0x8d || (offset + 9) > sec->size)
980 return FALSE;
981
6eaa7fb5
L		 982 /* %eax can't be used as the GOT base register since it is
983 used to pass parameter to ___tls_get_addr. */
984 reg = val & 7;
985 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca 986 return FALSE;
142411ca 987
6eaa7fb5
L		 988 indirect_call = call[0] == 0xff;
989 if (!(reg == 3 && call[0] == 0xe8)
990 && !(call[0] == 0x67 && call[1] == 0xe8)
991 && !(indirect_call
992 && (call[1] & 0xf8) == 0x90
993 && (call[1] & 0x7) == reg))
994 return FALSE;
995 }
142411ca
L		 996
997 r_symndx = ELF32_R_SYM (rel[1].r_info);
998 if (r_symndx < symtab_hdr->sh_info)
999 return FALSE;
1000
1001 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1d4af308 1002 if (h == NULL
0afcef53 1003 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
6eaa7fb5
L		 1004 return FALSE;
1005 else if (indirect_call)
1006 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
1007 else
1008 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1009 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
142411ca
L		 1010
1011 case R_386_TLS_IE:
1012 /* Check transition from IE access model:
1013 movl foo@indntpoff(%rip), %eax
1014 movl foo@indntpoff(%rip), %reg
1015 addl foo@indntpoff(%rip), %reg
1016 */
1017
1018 if (offset < 1 || (offset + 4) > sec->size)
1019 return FALSE;
1020
1021 /* Check "movl foo@tpoff(%rip), %eax" first. */
1022 val = bfd_get_8 (abfd, contents + offset - 1);
1023 if (val == 0xa1)
1024 return TRUE;
1025
1026 if (offset < 2)
1027 return FALSE;
1028
1029 /* Check movl|addl foo@tpoff(%rip), %reg. */
1030 type = bfd_get_8 (abfd, contents + offset - 2);
1031 return ((type == 0x8b || type == 0x03)
1032 && (val & 0xc7) == 0x05);
1033
1034 case R_386_TLS_GOTIE:
1035 case R_386_TLS_IE_32:
1036 /* Check transition from {IE_32,GOTIE} access model:
1037 subl foo@{tpoff,gontoff}(%reg1), %reg2
1038 movl foo@{tpoff,gontoff}(%reg1), %reg2
1039 addl foo@{tpoff,gontoff}(%reg1), %reg2
1040 */
1041
1042 if (offset < 2 || (offset + 4) > sec->size)
1043 return FALSE;
1044
1045 val = bfd_get_8 (abfd, contents + offset - 1);
1046 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1047 return FALSE;
1048
1049 type = bfd_get_8 (abfd, contents + offset - 2);
1050 return type == 0x8b || type == 0x2b || type == 0x03;
1051
1052 case R_386_TLS_GOTDESC:
1053 /* Check transition from GDesc access model:
1054 leal x@tlsdesc(%ebx), %eax
1055
1056 Make sure it's a leal adding ebx to a 32-bit offset
1057 into any register, although it's probably almost always
1058 going to be eax. */
1059
1060 if (offset < 2 || (offset + 4) > sec->size)
1061 return FALSE;
1062
1063 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1064 return FALSE;
1065
1066 val = bfd_get_8 (abfd, contents + offset - 1);
1067 return (val & 0xc7) == 0x83;
1068
1069 case R_386_TLS_DESC_CALL:
1070 /* Check transition from GDesc access model:
6eaa7fb5 1071 call *x@tlsdesc(%eax)
142411ca
L		 1072 */
1073 if (offset + 2 <= sec->size)
1074 {
6eaa7fb5
L		 1075 /* Make sure that it's a call *x@tlsdesc(%eax). */
1076 call = contents + offset;
1077 return call[0] == 0xff && call[1] == 0x10;
142411ca
L		 1078 }
1079
1080 return FALSE;
1081
1082 default:
1083 abort ();
1084 }
1085}
1086
1087/* Return TRUE if the TLS access transition is OK or no transition
1088 will be performed. Update R_TYPE if there is a transition. */
1089
1090static bfd_boolean
1091elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1092 asection *sec, bfd_byte *contents,
1093 Elf_Internal_Shdr *symtab_hdr,
1094 struct elf_link_hash_entry **sym_hashes,
1095 unsigned int *r_type, int tls_type,
1096 const Elf_Internal_Rela *rel,
1097 const Elf_Internal_Rela *relend,
4c544807 1098 struct elf_link_hash_entry *h,
bedfd056
L		 1099 unsigned long r_symndx,
1100 bfd_boolean from_relocate_section)
142411ca
L		 1101{
1102 unsigned int from_type = *r_type;
1103 unsigned int to_type = from_type;
1104 bfd_boolean check = TRUE;
1105
bb1cb422
L		 1106 /* Skip TLS transition for functions. */
1107 if (h != NULL
1108 && (h->type == STT_FUNC
1109 || h->type == STT_GNU_IFUNC))
1110 return TRUE;
1111
142411ca 1112 switch (from_type)
13ae64f3
JJ		 1113 {
1114 case R_386_TLS_GD:
67a4f2b7
AO		 1115 case R_386_TLS_GOTDESC:
1116 case R_386_TLS_DESC_CALL:
13ae64f3 1117 case R_386_TLS_IE_32:
37e55690
JJ		 1118 case R_386_TLS_IE:
1119 case R_386_TLS_GOTIE:
0e1862bb 1120 if (bfd_link_executable (info))
142411ca
L		 1121 {
1122 if (h == NULL)
1123 to_type = R_386_TLS_LE_32;
1124 else if (from_type != R_386_TLS_IE
1125 && from_type != R_386_TLS_GOTIE)
1126 to_type = R_386_TLS_IE_32;
1127 }
1128
bedfd056
L		 1129 /* When we are called from elf_i386_relocate_section, there may
1130 be additional transitions based on TLS_TYPE. */
1131 if (from_relocate_section)
142411ca
L		 1132 {
1133 unsigned int new_to_type = to_type;
1134
0e1862bb 1135 if (bfd_link_executable (info)
142411ca
L		 1136 && h != NULL
1137 && h->dynindx == -1
1138 && (tls_type & GOT_TLS_IE))
1139 new_to_type = R_386_TLS_LE_32;
1140
1141 if (to_type == R_386_TLS_GD
1142 || to_type == R_386_TLS_GOTDESC
1143 || to_type == R_386_TLS_DESC_CALL)
1144 {
1145 if (tls_type == GOT_TLS_IE_POS)
1146 new_to_type = R_386_TLS_GOTIE;
1147 else if (tls_type & GOT_TLS_IE)
1148 new_to_type = R_386_TLS_IE_32;
1149 }
1150
1151 /* We checked the transition before when we were called from
1152 elf_i386_check_relocs. We only want to check the new
1153 transition which hasn't been checked before. */
1154 check = new_to_type != to_type && from_type == to_type;
1155 to_type = new_to_type;
1156 }
1157
1158 break;
1159
13ae64f3 1160 case R_386_TLS_LDM:
0e1862bb 1161 if (bfd_link_executable (info))
142411ca
L		 1162 to_type = R_386_TLS_LE_32;
1163 break;
1164
1165 default:
1166 return TRUE;
1167 }
1168
1169 /* Return TRUE if there is no transition. */
1170 if (from_type == to_type)
1171 return TRUE;
1172
1173 /* Check if the transition can be performed. */
1174 if (check
bedfd056 1175 && ! elf_i386_check_tls_transition (sec, contents,
142411ca
L		 1176 symtab_hdr, sym_hashes,
1177 from_type, rel, relend))
1178 {
2f629d23 1179 reloc_howto_type *from, *to;
4c544807 1180 const char *name;
142411ca
L		 1181
1182 from = elf_i386_rtype_to_howto (abfd, from_type);
1183 to = elf_i386_rtype_to_howto (abfd, to_type);
1184
4c544807
L		 1185 if (h)
1186 name = h->root.root.string;
1187 else
1188 {
0afcef53 1189 struct elf_x86_link_hash_table *htab;
4dfe6ac6 1190
0afcef53 1191 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 1192 if (htab == NULL)
1193 name = "*unknown*";
1194 else
1195 {
1196 Elf_Internal_Sym *isym;
1197
1198 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1199 abfd, r_symndx);
1200 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1201 }
4c544807
L		 1202 }
1203
4eca0228 1204 _bfd_error_handler
695344c0 1205 /* xgettext:c-format */
d42c267e 1206 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
142411ca 1207 "in section `%A' failed"),
c08bb8dd 1208 abfd, from->name, to->name, name,
d42c267e 1209 rel->r_offset, sec);
142411ca
L		 1210 bfd_set_error (bfd_error_bad_value);
1211 return FALSE;
13ae64f3
JJ		 1212 }
1213
142411ca
L		 1214 *r_type = to_type;
1215 return TRUE;
13ae64f3
JJ		 1216}
1217
c175a657
L		 1218/* With the local symbol, foo, we convert
1219 mov foo@GOT[(%reg1)], %reg2
1220 to
1221 lea foo[@GOTOFF(%reg1)], %reg2
1222 and convert
1223 call/jmp *foo@GOT[(%reg)]
1224 to
1225 nop call foo/jmp foo nop
1226 When PIC is false, convert
1227 test %reg1, foo@GOT[(%reg2)]
1228 to
1229 test $foo, %reg1
1230 and convert
1231 binop foo@GOT[(%reg1)], %reg2
1232 to
1233 binop $foo, %reg2
1234 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1235 instructions. */
1236
1237static
1238bfd_boolean
1239elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1240 bfd_byte *contents,
1241 Elf_Internal_Rela *irel,
1242 struct elf_link_hash_entry *h,
1243 bfd_boolean *converted,
1244 struct bfd_link_info *link_info)
1245{
0afcef53 1246 struct elf_x86_link_hash_table *htab;
c175a657
L		 1247 unsigned int opcode;
1248 unsigned int modrm;
1249 bfd_boolean baseless;
1250 Elf_Internal_Sym *isym;
1251 unsigned int addend;
1252 unsigned int nop;
1253 bfd_vma nop_offset;
1254 bfd_boolean is_pic;
1255 bfd_boolean to_reloc_32;
1256 unsigned int r_type;
1257 unsigned int r_symndx;
1258 bfd_vma roff = irel->r_offset;
1259
1260 if (roff < 2)
1261 return TRUE;
1262
7d4d9709 1263 /* Addend for R_386_GOT32X relocations must be 0. */
c175a657
L		 1264 addend = bfd_get_32 (abfd, contents + roff);
1265 if (addend != 0)
1266 return TRUE;
1267
0afcef53 1268 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
c175a657
L		 1269 is_pic = bfd_link_pic (link_info);
1270
1271 r_type = ELF32_R_TYPE (irel->r_info);
1272 r_symndx = ELF32_R_SYM (irel->r_info);
1273
1274 modrm = bfd_get_8 (abfd, contents + roff - 1);
1275 baseless = (modrm & 0xc7) == 0x5;
1276
7d4d9709 1277 if (baseless && is_pic)
c175a657
L		 1278 {
1279 /* For PIC, disallow R_386_GOT32X without a base register
7d4d9709 1280 since we don't know what the GOT base is. */
c175a657
L		 1281 const char *name;
1282
1283 if (h == NULL)
1284 {
1285 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1286 r_symndx);
1287 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1288 }
1289 else
1290 name = h->root.root.string;
1291
4eca0228 1292 _bfd_error_handler
695344c0 1293 /* xgettext:c-format */
63a5468a
AM		 1294 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1295 " register can not be used when making a shared object"),
c175a657
L		 1296 abfd, name);
1297 return FALSE;
1298 }
1299
1300 opcode = bfd_get_8 (abfd, contents + roff - 2);
1301
c175a657
L		 1302 /* Convert to R_386_32 if PIC is false or there is no base
1303 register. */
1304 to_reloc_32 = !is_pic || baseless;
1305
7d4d9709
L		 1306 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1307 reloc. */
c175a657
L		 1308 if (h == NULL)
1309 {
1310 if (opcode == 0x0ff)
1311 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1312 goto convert_branch;
1313 else
1314 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1315 "test %reg1, foo@GOT(%reg2)" and
1316 "binop foo@GOT[(%reg1)], %reg2". */
1317 goto convert_load;
1318 }
1319
1320 /* Undefined weak symbol is only bound locally in executable
1321 and its reference is resolved as 0. */
0afcef53
L		 1322 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, I386_ELF_DATA, TRUE,
1323 elf_x86_hash_entry (h)))
c175a657
L		 1324 {
1325 if (opcode == 0xff)
1326 {
1327 /* No direct branch to 0 for PIC. */
1328 if (is_pic)
1329 return TRUE;
1330 else
1331 goto convert_branch;
1332 }
1333 else
1334 {
1335 /* We can convert load of address 0 to R_386_32. */
1336 to_reloc_32 = TRUE;
1337 goto convert_load;
1338 }
1339 }
1340
1341 if (opcode == 0xff)
1342 {
1343 /* We have "call/jmp *foo@GOT[(%reg)]". */
1344 if ((h->root.type == bfd_link_hash_defined
1345 || h->root.type == bfd_link_hash_defweak)
1346 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1347 {
1348 /* The function is locally defined. */
1349convert_branch:
1350 /* Convert R_386_GOT32X to R_386_PC32. */
1351 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1352 {
0afcef53
L		 1353 struct elf_x86_link_hash_entry *eh
1354 = (struct elf_x86_link_hash_entry *) h;
6eaa7fb5 1355
c175a657
L		 1356 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1357 is a nop prefix. */
1358 modrm = 0xe8;
6eaa7fb5
L		 1359 /* To support TLS optimization, always use addr32 prefix
1360 for "call *___tls_get_addr@GOT(%reg)". */
1d4af308 1361 if (eh && eh->tls_get_addr)
c175a657 1362 {
6eaa7fb5
L		 1363 nop = 0x67;
1364 nop_offset = irel->r_offset - 2;
c175a657
L		 1365 }
1366 else
6eaa7fb5
L		 1367 {
1368 nop = link_info->call_nop_byte;
1369 if (link_info->call_nop_as_suffix)
1370 {
1371 nop_offset = roff + 3;
1372 irel->r_offset -= 1;
1373 }
1374 else
1375 nop_offset = roff - 2;
1376 }
c175a657
L		 1377 }
1378 else
1379 {
1380 /* Convert to "jmp foo nop". */
1381 modrm = 0xe9;
1382 nop = NOP_OPCODE;
1383 nop_offset = roff + 3;
1384 irel->r_offset -= 1;
1385 }
1386
1387 bfd_put_8 (abfd, nop, contents + nop_offset);
1388 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1389 /* When converting to PC-relative relocation, we
1390 need to adjust addend by -4. */
1391 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1392 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1393
1394 *converted = TRUE;
1395 }
1396 }
1397 else
1398 {
1399 /* We have "mov foo@GOT[(%re1g)], %reg2",
1400 "test %reg1, foo@GOT(%reg2)" and
1401 "binop foo@GOT[(%reg1)], %reg2".
1402
1403 Avoid optimizing _DYNAMIC since ld.so may use its
1404 link-time address. */
1405 if (h == htab->elf.hdynamic)
1406 return TRUE;
1407
1408 /* def_regular is set by an assignment in a linker script in
cbd0eecf
L		 1409 bfd_elf_record_link_assignment. start_stop is set on
1410 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1411 if (h->start_stop
1412 || ((h->def_regular
1413 || h->root.type == bfd_link_hash_defined
1414 || h->root.type == bfd_link_hash_defweak)
1415 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
c175a657
L		 1416 {
1417convert_load:
1418 if (opcode == 0x8b)
1419 {
1420 if (to_reloc_32)
1421 {
1422 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1423 "mov $foo, %reg2" with R_386_32. */
1424 r_type = R_386_32;
1425 modrm = 0xc0 | (modrm & 0x38) >> 3;
1426 bfd_put_8 (abfd, modrm, contents + roff - 1);
1427 opcode = 0xc7;
1428 }
1429 else
1430 {
1431 /* Convert "mov foo@GOT(%reg1), %reg2" to
1432 "lea foo@GOTOFF(%reg1), %reg2". */
1433 r_type = R_386_GOTOFF;
1434 opcode = 0x8d;
1435 }
1436 }
1437 else
1438 {
1439 /* Only R_386_32 is supported. */
1440 if (!to_reloc_32)
1441 return TRUE;
1442
1443 if (opcode == 0x85)
1444 {
1445 /* Convert "test %reg1, foo@GOT(%reg2)" to
1446 "test $foo, %reg1". */
1447 modrm = 0xc0 | (modrm & 0x38) >> 3;
1448 opcode = 0xf7;
1449 }
1450 else
1451 {
1452 /* Convert "binop foo@GOT(%reg1), %reg2" to
1453 "binop $foo, %reg2". */
1454 modrm = (0xc0
1455 | (modrm & 0x38) >> 3
1456 | (opcode & 0x3c));
1457 opcode = 0x81;
1458 }
1459 bfd_put_8 (abfd, modrm, contents + roff - 1);
1460 r_type = R_386_32;
1461 }
1462
1463 bfd_put_8 (abfd, opcode, contents + roff - 2);
1464 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1465
1466 *converted = TRUE;
1467 }
1468 }
1469
1470 return TRUE;
1471}
1472
c1d11331
L		 1473/* Rename some of the generic section flags to better document how they
1474 are used here. */
c337a162
L		 1475#define need_convert_load sec_flg0
1476#define check_relocs_failed sec_flg1
c1d11331 1477
252b5132 1478/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1479 calculate needed space in the global offset table, procedure linkage
1480 table, and dynamic reloc sections. */
252b5132 1481
b34976b6 1482static bfd_boolean
55fd94b0
AM		 1483elf_i386_check_relocs (bfd *abfd,
1484 struct bfd_link_info *info,
1485 asection *sec,
1486 const Elf_Internal_Rela *relocs)
252b5132 1487{
0afcef53 1488 struct elf_x86_link_hash_table *htab;
252b5132
RH		 1489 Elf_Internal_Shdr *symtab_hdr;
1490 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1491 const Elf_Internal_Rela *rel;
1492 const Elf_Internal_Rela *rel_end;
252b5132 1493 asection *sreloc;
bedfd056 1494 bfd_byte *contents;
252b5132 1495
0e1862bb 1496 if (bfd_link_relocatable (info))
b34976b6 1497 return TRUE;
252b5132 1498
081b1afe
L		 1499 /* Don't do anything special with non-loaded, non-alloced sections.
1500 In particular, any relocs in such sections should not affect GOT
1501 and PLT reference counting (ie. we don't allow them to create GOT
1502 or PLT entries), there's no possibility or desire to optimize TLS
1503 relocs, and there's not much point in propagating relocs to shared
1504 libs that the dynamic linker won't relocate. */
1505 if ((sec->flags & SEC_ALLOC) == 0)
1506 return TRUE;
1507
0ffa91dd
NC		 1508 BFD_ASSERT (is_i386_elf (abfd));
1509
0afcef53 1510 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6 1511 if (htab == NULL)
c337a162
L		 1512 {
1513 sec->check_relocs_failed = 1;
1514 return FALSE;
1515 }
4dfe6ac6 1516
bedfd056
L		 1517 /* Get the section contents. */
1518 if (elf_section_data (sec)->this_hdr.contents != NULL)
1519 contents = elf_section_data (sec)->this_hdr.contents;
1520 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1521 {
1522 sec->check_relocs_failed = 1;
1523 return FALSE;
1524 }
1525
0ffa91dd 1526 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1527 sym_hashes = elf_sym_hashes (abfd);
252b5132 1528
252b5132
RH		 1529 sreloc = NULL;
1530
1531 rel_end = relocs + sec->reloc_count;
1532 for (rel = relocs; rel < rel_end; rel++)
1533 {
13ae64f3 1534 unsigned int r_type;
d42c267e 1535 unsigned int r_symndx;
252b5132 1536 struct elf_link_hash_entry *h;
0afcef53 1537 struct elf_x86_link_hash_entry *eh;
4c544807
L		 1538 Elf_Internal_Sym *isym;
1539 const char *name;
06a6a421 1540 bfd_boolean size_reloc;
252b5132
RH		 1541
1542 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1543 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1544
d9bc7a44 1545 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1546 {
695344c0 1547 /* xgettext:c-format */
4eca0228
AM		 1548 _bfd_error_handler (_("%B: bad symbol index: %d"),
1549 abfd, r_symndx);
c337a162 1550 goto error_return;
f5f31454
L		 1551 }
1552
252b5132 1553 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1554 {
1555 /* A local symbol. */
c2e61a4e
L		 1556 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1557 abfd, r_symndx);
1558 if (isym == NULL)
c337a162 1559 goto error_return;
c25bc9fc
L		 1560
1561 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1562 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1563 {
0afcef53 1564 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1565 if (h == NULL)
c337a162 1566 goto error_return;
6bbec505 1567
c25bc9fc 1568 /* Fake a STT_GNU_IFUNC symbol. */
6322e5c5
L		 1569 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1570 isym, NULL);
c25bc9fc
L		 1571 h->type = STT_GNU_IFUNC;
1572 h->def_regular = 1;
1573 h->ref_regular = 1;
1574 h->forced_local = 1;
1575 h->root.type = bfd_link_hash_defined;
1576 }
1577 else
1578 h = NULL;
1579 }
252b5132 1580 else
71cb9464 1581 {
4c544807 1582 isym = NULL;
71cb9464
L		 1583 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1584 while (h->root.type == bfd_link_hash_indirect
1585 || h->root.type == bfd_link_hash_warning)
1586 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1587 }
cbe950e9 1588
0afcef53 1589 eh = (struct elf_x86_link_hash_entry *) h;
c25bc9fc
L		 1590 if (h != NULL)
1591 {
f604c2a2
L		 1592 if (r_type == R_386_GOTOFF)
1593 eh->gotoff_ref = 1;
cbe950e9 1594
ad1e85de
L		 1595 /* It is referenced by a non-shared object. */
1596 h->ref_regular = 1;
bc4e12de 1597 h->root.non_ir_ref_regular = 1;
13a2df29
L		 1598
1599 if (h->type == STT_GNU_IFUNC)
1600 elf_tdata (info->output_bfd)->has_gnu_symbols
1601 |= elf_gnu_symbol_ifunc;
71cb9464 1602 }
252b5132 1603
bedfd056 1604 if (! elf_i386_tls_transition (info, abfd, sec, contents,
142411ca
L		 1605 symtab_hdr, sym_hashes,
1606 &r_type, GOT_UNKNOWN,
bedfd056 1607 rel, rel_end, h, r_symndx, FALSE))
c337a162 1608 goto error_return;
13ae64f3
JJ		 1609
1610 switch (r_type)
252b5132 1611 {
37e55690 1612 case R_386_TLS_LDM:
0afcef53 1613 htab->tls_ld_or_ldm_got.refcount += 1;
37e55690
JJ		 1614 goto create_got;
1615
1616 case R_386_PLT32:
1617 /* This symbol requires a procedure linkage table entry. We
1618 actually build the entry in adjust_dynamic_symbol,
1619 because this might be a case of linking PIC code which is
1620 never referenced by a dynamic object, in which case we
1621 don't need to generate a procedure linkage table entry
1622 after all. */
1623
1624 /* If this is a local symbol, we resolve it directly without
1625 creating a procedure linkage table entry. */
1626 if (h == NULL)
1627 continue;
1628
aec6b87e 1629 eh->has_got_reloc = 1;
f5385ebf 1630 h->needs_plt = 1;
37e55690
JJ		 1631 h->plt.refcount += 1;
1632 break;
1633
6a3e1bae 1634 case R_386_SIZE32:
06a6a421 1635 size_reloc = TRUE;
6a3e1bae
L		 1636 goto do_size;
1637
13ae64f3 1638 case R_386_TLS_IE_32:
37e55690
JJ		 1639 case R_386_TLS_IE:
1640 case R_386_TLS_GOTIE:
0e1862bb 1641 if (!bfd_link_executable (info))
13ae64f3 1642 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1643 /* Fall through */
1644
252b5132 1645 case R_386_GOT32:
02a86693 1646 case R_386_GOT32X:
13ae64f3 1647 case R_386_TLS_GD:
67a4f2b7
AO		 1648 case R_386_TLS_GOTDESC:
1649 case R_386_TLS_DESC_CALL:
252b5132 1650 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1651 {
1652 int tls_type, old_tls_type;
1653
1654 switch (r_type)
1655 {
1656 default:
02a86693
L		 1657 case R_386_GOT32:
1658 case R_386_GOT32X:
1659 tls_type = GOT_NORMAL;
1660 break;
13ae64f3 1661 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1662 case R_386_TLS_GOTDESC:
1663 case R_386_TLS_DESC_CALL:
1664 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1665 case R_386_TLS_IE_32:
1666 if (ELF32_R_TYPE (rel->r_info) == r_type)
1667 tls_type = GOT_TLS_IE_NEG;
1668 else
ebcfb3c0
JJ		 1669 /* If this is a GD->IE transition, we may use either of
1670 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1671 tls_type = GOT_TLS_IE;
1672 break;
1673 case R_386_TLS_IE:
1674 case R_386_TLS_GOTIE:
1675 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1676 }
1677
1678 if (h != NULL)
1679 {
1680 h->got.refcount += 1;
0afcef53 1681 old_tls_type = elf_x86_hash_entry (h)->tls_type;
13ae64f3
JJ		 1682 }
1683 else
1684 {
1685 bfd_signed_vma *local_got_refcounts;
1686
1687 /* This is a global offset table entry for a local symbol. */
1688 local_got_refcounts = elf_local_got_refcounts (abfd);
1689 if (local_got_refcounts == NULL)
1690 {
1691 bfd_size_type size;
1692
1693 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1694 size *= (sizeof (bfd_signed_vma)
1695 + sizeof (bfd_vma) + sizeof(char));
a50b1753
NC		 1696 local_got_refcounts = (bfd_signed_vma *)
1697 bfd_zalloc (abfd, size);
13ae64f3 1698 if (local_got_refcounts == NULL)
c337a162 1699 goto error_return;
13ae64f3 1700 elf_local_got_refcounts (abfd) = local_got_refcounts;
0afcef53 1701 elf_x86_local_tlsdesc_gotent (abfd)
67a4f2b7 1702 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
0afcef53 1703 elf_x86_local_got_tls_type (abfd)
67a4f2b7 1704 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3
JJ		 1705 }
1706 local_got_refcounts[r_symndx] += 1;
0afcef53 1707 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
13ae64f3
JJ		 1708 }
1709
37e55690
JJ		 1710 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1711 tls_type |= old_tls_type;
13ae64f3
JJ		 1712 /* If a TLS symbol is accessed using IE at least once,
1713 there is no point to use dynamic model for it. */
ebcfb3c0 1714 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1715 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1716 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1717 {
67a4f2b7 1718 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1719 tls_type = old_tls_type;
67a4f2b7
AO		 1720 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1721 && GOT_TLS_GD_ANY_P (tls_type))
1722 tls_type |= old_tls_type;
13ae64f3
JJ		 1723 else
1724 {
09a24cbf 1725 if (h)
4c544807
L		 1726 name = h->root.root.string;
1727 else
1728 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1729 NULL);
4eca0228 1730 _bfd_error_handler
695344c0 1731 /* xgettext:c-format */
d003868e 1732 (_("%B: `%s' accessed both as normal and "
55fd94b0 1733 "thread local symbol"),
4c544807 1734 abfd, name);
68c4a57e 1735 bfd_set_error (bfd_error_bad_value);
c337a162 1736 goto error_return;
13ae64f3
JJ		 1737 }
1738 }
1739
1740 if (old_tls_type != tls_type)
1741 {
1742 if (h != NULL)
0afcef53 1743 elf_x86_hash_entry (h)->tls_type = tls_type;
13ae64f3 1744 else
0afcef53 1745 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
13ae64f3
JJ		 1746 }
1747 }
0ac8d2ca
AM		 1748 /* Fall through */
1749
1750 case R_386_GOTOFF:
1751 case R_386_GOTPC:
13ae64f3 1752 create_got:
37e55690 1753 if (r_type != R_386_TLS_IE)
aec6b87e
L		 1754 {
1755 if (eh != NULL)
1756 eh->has_got_reloc = 1;
1757 break;
1758 }
37e55690 1759 /* Fall through */
252b5132 1760
37e55690
JJ		 1761 case R_386_TLS_LE_32:
1762 case R_386_TLS_LE:
aec6b87e
L		 1763 if (eh != NULL)
1764 eh->has_got_reloc = 1;
0e1862bb 1765 if (bfd_link_executable (info))
37e55690 1766 break;
bffbf940 1767 info->flags |= DF_STATIC_TLS;
aec6b87e 1768 goto do_relocation;
252b5132
RH		 1769
1770 case R_386_32:
1771 case R_386_PC32:
aec6b87e
L		 1772 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1773 eh->has_non_got_reloc = 1;
1774do_relocation:
bf52d7c7
L		 1775 /* We are called after all symbols have been resolved. Only
1776 relocation against STT_GNU_IFUNC symbol must go through
1777 PLT. */
d1ed1c7d
L		 1778 if (h != NULL
1779 && (bfd_link_executable (info)
bf52d7c7 1780 || h->type == STT_GNU_IFUNC))
6725bdbf 1781 {
12d0ee4a 1782 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1783 need a copy reloc. We can't check reliably at this
1784 stage whether the section is read-only, as input
1785 sections have not yet been mapped to output sections.
1786 Tentatively set the flag for now, and correct in
1787 adjust_dynamic_symbol. */
f5385ebf 1788 h->non_got_ref = 1;
12d0ee4a 1789
233cc9c1
L		 1790 /* We may need a .plt entry if the symbol is a function
1791 defined in a shared lib or is a STT_GNU_IFUNC function
1792 referenced from the code or read-only section. */
34bb2571
L		 1793 if (!h->def_regular
1794 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
233cc9c1
L		 1795 h->plt.refcount += 1;
1796
4b627c18
L		 1797 if (r_type == R_386_PC32)
1798 {
1799 /* Since something like ".long foo - ." may be used
1800 as pointer, make sure that PLT is used if foo is
1801 a function defined in a shared library. */
1802 if ((sec->flags & SEC_CODE) == 0)
1803 h->pointer_equality_needed = 1;
74437ea2
L		 1804 else if (h->type == STT_GNU_IFUNC
1805 && bfd_link_pic (info))
1806 {
6322e5c5
L		 1807 _bfd_error_handler
1808 /* xgettext:c-format */
1809 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
1810 abfd, h->root.root.string);
74437ea2
L		 1811 bfd_set_error (bfd_error_bad_value);
1812 goto error_return;
1813 }
4b627c18
L		 1814 }
1815 else
04ebc307
L		 1816 {
1817 h->pointer_equality_needed = 1;
1818 /* R_386_32 can be resolved at run-time. */
1819 if (r_type == R_386_32
1820 && (sec->flags & SEC_READONLY) == 0)
1821 eh->func_pointer_refcount += 1;
1822 }
6725bdbf 1823 }
7843f00e 1824
06a6a421 1825 size_reloc = FALSE;
6a3e1bae 1826do_size:
252b5132 1827 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1828 against a global symbol, or a non PC relative reloc
1829 against a local symbol, then we need to copy the reloc
1830 into the shared library. However, if we are linking with
1831 -Bsymbolic, we do not need to copy a reloc against a
1832 global symbol which is defined in an object we are
1833 including in the link (i.e., DEF_REGULAR is set). At
1834 this point we have not seen all the input files, so it is
1835 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1836 later (it is never cleared). In case of a weak definition,
1837 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1838 a shared library. We account for that possibility below by
1f655a09
L		 1839 storing information in the relocs_copied field of the hash
1840 table entry. A similar situation occurs when creating
1841 shared libraries and symbol visibility changes render the
12d0ee4a 1842 symbol local.
56882138 1843
12d0ee4a
AM		 1844 If on the other hand, we are creating an executable, we
1845 may need to keep relocations for symbols satisfied by a
1846 dynamic library if we manage to avoid copy relocs for the
233cc9c1
L		 1847 symbol.
1848
1849 Generate dynamic pointer relocation against STT_GNU_IFUNC
1850 symbol in the non-code section. */
081b1afe
L		 1851 if ((bfd_link_pic (info)
1852 && (r_type != R_386_PC32
1853 || (h != NULL
1854 && (! (bfd_link_pie (info)
1855 || SYMBOLIC_BIND (info, h))
1856 || h->root.type == bfd_link_hash_defweak
1857 || !h->def_regular))))
233cc9c1
L		 1858 || (h != NULL
1859 && h->type == STT_GNU_IFUNC
1860 && r_type == R_386_32
1861 && (sec->flags & SEC_CODE) == 0)
081b1afe
L		 1862 || (ELIMINATE_COPY_RELOCS
1863 && !bfd_link_pic (info)
1864 && h != NULL
1865 && (h->root.type == bfd_link_hash_defweak
1866 || !h->def_regular)))
252b5132 1867 {
e03a8ed8
L		 1868 struct elf_dyn_relocs *p;
1869 struct elf_dyn_relocs **head;
ec338859 1870
12d0ee4a
AM		 1871 /* We must copy these reloc types into the output file.
1872 Create a reloc section in dynobj and make room for
1873 this reloc. */
252b5132
RH		 1874 if (sreloc == NULL)
1875 {
83bac4b0
NC		 1876 sreloc = _bfd_elf_make_dynamic_reloc_section
1877 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1878
252b5132 1879 if (sreloc == NULL)
c337a162 1880 goto error_return;
252b5132
RH		 1881 }
1882
0c715baa
AM		 1883 /* If this is a global symbol, we count the number of
1884 relocations we need for this symbol. */
1885 if (h != NULL)
252b5132 1886 {
d5597ebc 1887 head = &eh->dyn_relocs;
0c715baa
AM		 1888 }
1889 else
1890 {
ec338859
AM		 1891 /* Track dynamic relocs needed for local syms too.
1892 We really need local syms available to do this
1893 easily. Oh well. */
87d72d41 1894 void **vpp;
ec338859 1895 asection *s;
87d72d41
AM		 1896
1897 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1898 abfd, r_symndx);
1899 if (isym == NULL)
c337a162 1900 goto error_return;
87d72d41
AM		 1901
1902 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1903 if (s == NULL)
87d72d41 1904 s = sec;
ec338859 1905
e81d3500 1906 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1907 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 1908 }
1909
1910 p = *head;
1911 if (p == NULL || p->sec != sec)
1912 {
1913 bfd_size_type amt = sizeof *p;
a50b1753
NC		 1914 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1915 amt);
ec338859 1916 if (p == NULL)
c337a162 1917 goto error_return;
ec338859
AM		 1918 p->next = *head;
1919 *head = p;
1920 p->sec = sec;
1921 p->count = 0;
1922 p->pc_count = 0;
252b5132 1923 }
ec338859
AM		 1924
1925 p->count += 1;
06a6a421
L		 1926 /* Count size relocation as PC-relative relocation. */
1927 if (r_type == R_386_PC32 || size_reloc)
ec338859 1928 p->pc_count += 1;
252b5132 1929 }
252b5132
RH		 1930 break;
1931
1932 /* This relocation describes the C++ object vtable hierarchy.
1933 Reconstruct it for later use during GC. */
1934 case R_386_GNU_VTINHERIT:
d17e0c6e 1935 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c337a162 1936 goto error_return;
252b5132
RH		 1937 break;
1938
1939 /* This relocation describes which C++ vtable entries are actually
1940 used. Record for later use during GC. */
1941 case R_386_GNU_VTENTRY:
c6aa130f
MS		 1942 BFD_ASSERT (h != NULL);
1943 if (h != NULL
1944 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c337a162 1945 goto error_return;
252b5132
RH		 1946 break;
1947
1948 default:
1949 break;
1950 }
dd7e64d4 1951
52bf37dd 1952 if (r_type == R_386_GOT32X
c1d11331 1953 && (h == NULL || h->type != STT_GNU_IFUNC))
02a86693 1954 sec->need_convert_load = 1;
252b5132
RH		 1955 }
1956
bedfd056
L		 1957 if (elf_section_data (sec)->this_hdr.contents != contents)
1958 {
1959 if (!info->keep_memory)
1960 free (contents);
1961 else
1962 {
1963 /* Cache the section contents for elf_link_input_bfd. */
1964 elf_section_data (sec)->this_hdr.contents = contents;
1965 }
1966 }
1967
b34976b6 1968 return TRUE;
c337a162
L		 1969
1970error_return:
bedfd056
L		 1971 if (elf_section_data (sec)->this_hdr.contents != contents)
1972 free (contents);
c337a162
L		 1973 sec->check_relocs_failed = 1;
1974 return FALSE;
252b5132
RH		 1975}
1976
6725bdbf 1977/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 1978 dynamic relocs. */
6725bdbf 1979
b34976b6 1980static bfd_boolean
eb4ff4d6 1981elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 1982{
1983 struct bfd_link_info *info;
0afcef53
L		 1984 struct elf_x86_link_hash_table *htab;
1985 struct elf_x86_link_hash_entry *eh;
e03a8ed8 1986 struct elf_dyn_relocs *p;
25e762b9 1987 unsigned plt_entry_size;
aec6b87e 1988 bfd_boolean resolved_to_zero;
f604c2a2 1989 const struct elf_i386_backend_data *bed;
6725bdbf 1990
e92d460e 1991 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1992 return TRUE;
6725bdbf 1993
0afcef53 1994 eh = (struct elf_x86_link_hash_entry *) h;
e92d460e 1995
6725bdbf 1996 info = (struct bfd_link_info *) inf;
0afcef53 1997 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 1998 if (htab == NULL)
1999 return FALSE;
6725bdbf 2000
f604c2a2
L		 2001 bed = get_elf_i386_backend_data (info->output_bfd);
2002
765e526c 2003 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 2004
e62b9723 2005 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
0afcef53 2006 I386_ELF_DATA,
e62b9723
L		 2007 eh->has_got_reloc,
2008 eh);
aec6b87e 2009
04ebc307
L		 2010 /* Clear the reference count of function pointer relocations if
2011 symbol isn't a normal function. */
2012 if (h->type != STT_FUNC)
2013 eh->func_pointer_refcount = 0;
2014
dd7e64d4
L		 2015 /* We can't use the GOT PLT if pointer equality is needed since
2016 finish_dynamic_symbol won't clear symbol value and the dynamic
2017 linker won't update the GOT slot. We will get into an infinite
2018 loop at run-time. */
2019 if (htab->plt_got != NULL
2020 && h->type != STT_GNU_IFUNC
2021 && !h->pointer_equality_needed
2022 && h->plt.refcount > 0
2023 && h->got.refcount > 0)
2024 {
2025 /* Don't use the regular PLT if there are both GOT and GOTPLT
2026 reloctions. */
2027 h->plt.offset = (bfd_vma) -1;
2028
2029 /* Use the GOT PLT. */
2030 eh->plt_got.refcount = 1;
2031 }
2032
cbe950e9
L		 2033 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2034 here if it is defined and referenced in a non-shared object. */
2035 if (h->type == STT_GNU_IFUNC
2036 && h->def_regular)
ee2fdd6f
L		 2037 {
2038 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2039 &htab->readonly_dynrelocs_against_ifunc,
2040 plt_entry_size,
765e526c 2041 (htab->plt.has_plt0
0afcef53 2042 * plt_entry_size),
ee2fdd6f
L		 2043 4, TRUE))
2044 {
2045 asection *s = htab->plt_second;
2046 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2047 {
2048 /* Use the second PLT section if it is created. */
2049 eh->plt_second.offset = s->size;
2050
2051 /* Make room for this entry in the second PLT section. */
765e526c 2052 s->size += htab->non_lazy_plt->plt_entry_size;
ee2fdd6f
L		 2053 }
2054
2055 return TRUE;
2056 }
2057 else
2058 return FALSE;
2059 }
04ebc307
L		 2060 /* Don't create the PLT entry if there are only function pointer
2061 relocations which can be resolved at run-time. */
cbe950e9 2062 else if (htab->elf.dynamic_sections_created
04ebc307
L		 2063 && (h->plt.refcount > eh->func_pointer_refcount
2064 || eh->plt_got.refcount > 0))
6725bdbf 2065 {
dc2be3d2 2066 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
25070364 2067
04ebc307
L		 2068 /* Clear the reference count of function pointer relocations
2069 if PLT is used. */
2070 eh->func_pointer_refcount = 0;
2071
5a15f56f
AM		 2072 /* Make sure this symbol is output as a dynamic symbol.
2073 Undefined weak syms won't yet be marked as dynamic. */
2074 if (h->dynindx == -1
aec6b87e 2075 && !h->forced_local
0dc9a308
L		 2076 && !resolved_to_zero
2077 && h->root.type == bfd_link_hash_undefweak)
5a15f56f 2078 {
c152c796 2079 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2080 return FALSE;
5a15f56f
AM		 2081 }
2082
0e1862bb 2083 if (bfd_link_pic (info)
4e795f50 2084 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 2085 {
6de2ae4a 2086 asection *s = htab->elf.splt;
ee2fdd6f 2087 asection *second_s = htab->plt_second;
dd7e64d4 2088 asection *got_s = htab->plt_got;
6725bdbf 2089
7c1e8d3e
L		 2090 /* If this is the first .plt entry, make room for the special
2091 first entry. The .plt section is used by prelink to undo
2092 prelinking for dynamic relocations. */
2093 if (s->size == 0)
765e526c 2094 s->size = htab->plt.has_plt0 * plt_entry_size;
7c1e8d3e 2095
dd7e64d4
L		 2096 if (use_plt_got)
2097 eh->plt_got.offset = got_s->size;
2098 else
ee2fdd6f
L		 2099 {
2100 h->plt.offset = s->size;
2101 if (second_s)
2102 eh->plt_second.offset = second_s->size;
2103 }
6725bdbf 2104
ced53ee5
AM		 2105 /* If this symbol is not defined in a regular file, and we are
2106 not generating a shared library, then set the symbol to this
2107 location in the .plt. This is required to make function
2108 pointers compare as equal between the normal executable and
2109 the shared library. */
0e1862bb 2110 if (! bfd_link_pic (info)
f5385ebf 2111 && !h->def_regular)
ced53ee5 2112 {
dd7e64d4
L		 2113 if (use_plt_got)
2114 {
2115 /* We need to make a call to the entry of the GOT PLT
2116 instead of regular PLT entry. */
2117 h->root.u.def.section = got_s;
2118 h->root.u.def.value = eh->plt_got.offset;
2119 }
2120 else
2121 {
ee2fdd6f
L		 2122 if (second_s)
2123 {
2124 /* We need to make a call to the entry of the
2125 second PLT instead of regular PLT entry. */
2126 h->root.u.def.section = second_s;
2127 h->root.u.def.value = eh->plt_second.offset;
2128 }
2129 else
2130 {
2131 h->root.u.def.section = s;
2132 h->root.u.def.value = h->plt.offset;
2133 }
dd7e64d4 2134 }
ced53ee5 2135 }
6725bdbf 2136
ced53ee5 2137 /* Make room for this entry. */
dd7e64d4 2138 if (use_plt_got)
765e526c 2139 got_s->size += htab->non_lazy_plt->plt_entry_size;
dd7e64d4
L		 2140 else
2141 {
2142 s->size += plt_entry_size;
ee2fdd6f 2143 if (second_s)
765e526c 2144 second_s->size += htab->non_lazy_plt->plt_entry_size;
6725bdbf 2145
dd7e64d4
L		 2146 /* We also need to make an entry in the .got.plt section,
2147 which will be placed in the .got section by the linker
2148 script. */
2149 htab->elf.sgotplt->size += 4;
6725bdbf 2150
aec6b87e
L		 2151 /* There should be no PLT relocation against resolved
2152 undefined weak symbol in executable. */
2153 if (!resolved_to_zero)
2154 {
2155 /* We also need to make an entry in the .rel.plt
2156 section. */
2157 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2158 htab->elf.srelplt->reloc_count++;
2159 }
dd7e64d4 2160 }
eac338cf 2161
f604c2a2 2162 if (bed->os == is_vxworks && !bfd_link_pic (info))
eac338cf
PB		 2163 {
2164 /* VxWorks has a second set of relocations for each PLT entry
2165 in executables. They go in a separate relocation section,
2166 which is processed by the kernel loader. */
2167
2168 /* There are two relocations for the initial PLT entry: an
2169 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2170 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2171
765e526c 2172 asection *srelplt2 = htab->srelplt2;
25e762b9 2173 if (h->plt.offset == plt_entry_size)
0afcef53 2174 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
eac338cf
PB		 2175
2176 /* There are two extra relocations for each subsequent PLT entry:
2177 an R_386_32 relocation for the GOT entry, and an R_386_32
2178 relocation for the PLT entry. */
2179
0afcef53 2180 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
eac338cf 2181 }
6725bdbf 2182 }
ced53ee5
AM		 2183 else
2184 {
13f42277 2185 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2186 h->plt.offset = (bfd_vma) -1;
f5385ebf 2187 h->needs_plt = 0;
ced53ee5 2188 }
6725bdbf
AM		 2189 }
2190 else
2191 {
13f42277 2192 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2193 h->plt.offset = (bfd_vma) -1;
f5385ebf 2194 h->needs_plt = 0;
6725bdbf
AM		 2195 }
2196
67a4f2b7
AO		 2197 eh->tlsdesc_got = (bfd_vma) -1;
2198
37e55690 2199 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 2200 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2201 if (h->got.refcount > 0
0e1862bb 2202 && bfd_link_executable (info)
13ae64f3 2203 && h->dynindx == -1
0afcef53 2204 && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE))
cedb70c5 2205 h->got.offset = (bfd_vma) -1;
13ae64f3 2206 else if (h->got.refcount > 0)
6725bdbf 2207 {
0ac8d2ca 2208 asection *s;
b34976b6 2209 bfd_boolean dyn;
0afcef53 2210 int tls_type = elf_x86_hash_entry (h)->tls_type;
6725bdbf 2211
5a15f56f 2212 /* Make sure this symbol is output as a dynamic symbol.
0dc9a308 2213 Undefined weak syms won't yet be marked as dynamic. */
5a15f56f 2214 if (h->dynindx == -1
aec6b87e 2215 && !h->forced_local
e133d005 2216 && !resolved_to_zero
0dc9a308 2217 && h->root.type == bfd_link_hash_undefweak)
5a15f56f 2218 {
c152c796 2219 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2220 return FALSE;
5a15f56f
AM		 2221 }
2222
6de2ae4a 2223 s = htab->elf.sgot;
67a4f2b7
AO		 2224 if (GOT_TLS_GDESC_P (tls_type))
2225 {
6de2ae4a 2226 eh->tlsdesc_got = htab->elf.sgotplt->size
67a4f2b7 2227 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2228 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 2229 h->got.offset = (bfd_vma) -2;
2230 }
2231 if (! GOT_TLS_GDESC_P (tls_type)
2232 || GOT_TLS_GD_P (tls_type))
2233 {
2234 h->got.offset = s->size;
2235 s->size += 4;
2236 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2237 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2238 s->size += 4;
2239 }
ebe50bae 2240 dyn = htab->elf.dynamic_sections_created;
13ae64f3 2241 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 2242 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2243 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2244 need two), R_386_TLS_GD needs one if local symbol and two if
aec6b87e
L		 2245 global. No dynamic relocation against resolved undefined weak
2246 symbol in executable. */
37e55690 2247 if (tls_type == GOT_TLS_IE_BOTH)
6de2ae4a 2248 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2249 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
37e55690 2250 || (tls_type & GOT_TLS_IE))
6de2ae4a 2251 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2252 else if (GOT_TLS_GD_P (tls_type))
6de2ae4a 2253 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2254 else if (! GOT_TLS_GDESC_P (tls_type)
aec6b87e
L		 2255 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2256 && !resolved_to_zero)
67a4f2b7 2257 || h->root.type != bfd_link_hash_undefweak)
0e1862bb 2258 && (bfd_link_pic (info)
ef5aade5 2259 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6de2ae4a 2260 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2261 if (GOT_TLS_GDESC_P (tls_type))
6de2ae4a 2262 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 2263 }
2264 else
51b64d56 2265 h->got.offset = (bfd_vma) -1;
6725bdbf 2266
5a15f56f 2267 if (eh->dyn_relocs == NULL)
b34976b6 2268 return TRUE;
5a15f56f 2269
0c715baa
AM		 2270 /* In the shared -Bsymbolic case, discard space allocated for
2271 dynamic pc-relative relocs against symbols which turn out to be
2272 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 2273 space for pc-relative relocs that have become local due to symbol
2274 visibility changes. */
0c715baa 2275
0e1862bb 2276 if (bfd_link_pic (info))
5a15f56f 2277 {
09695f56
AM		 2278 /* The only reloc that uses pc_count is R_386_PC32, which will
2279 appear on a call or on something like ".long foo - .". We
2280 want calls to protected symbols to resolve directly to the
2281 function rather than going via the plt. If people want
2282 function pointer comparisons to work as expected then they
2283 should avoid writing assembly like ".long foo - .". */
2284 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 2285 {
e03a8ed8 2286 struct elf_dyn_relocs **pp;
0c715baa
AM		 2287
2288 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2289 {
c3ce498c
L		 2290 p->count -= p->pc_count;
2291 p->pc_count = 0;
0c715baa
AM		 2292 if (p->count == 0)
2293 *pp = p->next;
2294 else
2295 pp = &p->next;
2296 }
5a15f56f 2297 }
4e795f50 2298
f604c2a2 2299 if (bed->os == is_vxworks)
3348747a 2300 {
e03a8ed8 2301 struct elf_dyn_relocs **pp;
3348747a
NS		 2302 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2303 {
2304 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2305 *pp = p->next;
2306 else
2307 pp = &p->next;
2308 }
2309 }
2310
4e795f50 2311 /* Also discard relocs on undefined weak syms with non-default
aec6b87e 2312 visibility or in PIE. */
22d606e9 2313 if (eh->dyn_relocs != NULL
c353e543 2314 && h->root.type == bfd_link_hash_undefweak)
22d606e9 2315 {
aec6b87e
L		 2316 /* Undefined weak symbol is never bound locally in shared
2317 library. */
2318 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2319 || resolved_to_zero)
2320 {
2321 if (h->non_got_ref)
2322 {
2323 /* Keep dynamic non-GOT/non-PLT relocation so that we
2324 can branch to 0 without PLT. */
2325 struct elf_dyn_relocs **pp;
2326
2327 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2328 if (p->pc_count == 0)
2329 *pp = p->next;
2330 else
2331 {
2332 /* Remove non-R_386_PC32 relocation. */
2333 p->count = p->pc_count;
2334 pp = &p->next;
2335 }
22d606e9 2336
aec6b87e
L		 2337 if (eh->dyn_relocs != NULL)
2338 {
2339 /* Make sure undefined weak symbols are output
2340 as dynamic symbols in PIEs for dynamic non-GOT
2341 non-PLT reloations. */
2342 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2343 return FALSE;
2344 }
2345 }
2346 else
2347 eh->dyn_relocs = NULL;
2348 }
22d606e9
AM		 2349 else if (h->dynindx == -1
2350 && !h->forced_local)
2351 {
2352 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2353 return FALSE;
2354 }
2355 }
0c715baa 2356 }
a23b6845 2357 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 2358 {
2359 /* For the non-shared case, discard space for relocs against
2360 symbols which turn out to need copy relocs or are not
04ebc307
L		 2361 dynamic. Keep dynamic relocations for run-time function
2362 pointer initialization. */
0c715baa 2363
aec6b87e
L		 2364 if ((!h->non_got_ref
2365 || eh->func_pointer_refcount > 0
2366 || (h->root.type == bfd_link_hash_undefweak
2367 && !resolved_to_zero))
f5385ebf
AM		 2368 && ((h->def_dynamic
2369 && !h->def_regular)
ebe50bae 2370 || (htab->elf.dynamic_sections_created
0c715baa
AM		 2371 && (h->root.type == bfd_link_hash_undefweak
2372 || h->root.type == bfd_link_hash_undefined))))
2373 {
2374 /* Make sure this symbol is output as a dynamic symbol.
2375 Undefined weak syms won't yet be marked as dynamic. */
2376 if (h->dynindx == -1
aec6b87e 2377 && !h->forced_local
0dc9a308
L		 2378 && !resolved_to_zero
2379 && h->root.type == bfd_link_hash_undefweak)
0c715baa 2380 {
c152c796 2381 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2382 return FALSE;
0c715baa 2383 }
5a15f56f 2384
0c715baa
AM		 2385 /* If that succeeded, we know we'll be keeping all the
2386 relocs. */
2387 if (h->dynindx != -1)
2388 goto keep;
2389 }
2390
2391 eh->dyn_relocs = NULL;
04ebc307 2392 eh->func_pointer_refcount = 0;
0c715baa 2393
ec338859 2394 keep: ;
5a15f56f
AM		 2395 }
2396
0c715baa
AM		 2397 /* Finally, allocate space. */
2398 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 2399 {
e7c33416
NC		 2400 asection *sreloc;
2401
cbe950e9 2402 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2403
2404 BFD_ASSERT (sreloc != NULL);
eea6121a 2405 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 2406 }
2407
b34976b6 2408 return TRUE;
6725bdbf
AM		 2409}
2410
c25bc9fc
L		 2411/* Allocate space in .plt, .got and associated reloc sections for
2412 local dynamic relocs. */
2413
2414static bfd_boolean
2415elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2416{
2417 struct elf_link_hash_entry *h
2418 = (struct elf_link_hash_entry *) *slot;
2419
2420 if (h->type != STT_GNU_IFUNC
2421 || !h->def_regular
2422 || !h->ref_regular
2423 || !h->forced_local
2424 || h->root.type != bfd_link_hash_defined)
2425 abort ();
2426
2427 return elf_i386_allocate_dynrelocs (h, inf);
2428}
2429
c175a657 2430/* Convert load via the GOT slot to load immediate. */
daa67607
L		 2431
2432static bfd_boolean
02a86693 2433elf_i386_convert_load (bfd *abfd, asection *sec,
a6af384b 2434 struct bfd_link_info *link_info)
daa67607 2435{
0afcef53 2436 struct elf_x86_link_hash_table *htab;
daa67607
L		 2437 Elf_Internal_Shdr *symtab_hdr;
2438 Elf_Internal_Rela *internal_relocs;
2439 Elf_Internal_Rela *irel, *irelend;
2440 bfd_byte *contents;
c175a657 2441 bfd_boolean changed;
daa67607
L		 2442 bfd_signed_vma *local_got_refcounts;
2443
2444 /* Don't even try to convert non-ELF outputs. */
2445 if (!is_elf_hash_table (link_info->hash))
2446 return FALSE;
2447
c1d11331 2448 /* Nothing to do if there is no need or no output. */
daa67607 2449 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
02a86693 2450 || sec->need_convert_load == 0
c8831961 2451 || bfd_is_abs_section (sec->output_section))
daa67607
L		 2452 return TRUE;
2453
2454 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2455
2456 /* Load the relocations for this section. */
2457 internal_relocs = (_bfd_elf_link_read_relocs
2458 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2459 link_info->keep_memory));
2460 if (internal_relocs == NULL)
2461 return FALSE;
2462
c175a657 2463 changed = FALSE;
0afcef53 2464 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
daa67607
L		 2465 local_got_refcounts = elf_local_got_refcounts (abfd);
2466
2467 /* Get the section contents. */
2468 if (elf_section_data (sec)->this_hdr.contents != NULL)
2469 contents = elf_section_data (sec)->this_hdr.contents;
2470 else
2471 {
2472 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2473 goto error_return;
2474 }
2475
2476 irelend = internal_relocs + sec->reloc_count;
2477 for (irel = internal_relocs; irel < irelend; irel++)
2478 {
2479 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
c175a657 2480 unsigned int r_symndx;
daa67607 2481 struct elf_link_hash_entry *h;
c175a657 2482 bfd_boolean converted;
daa67607 2483
7d4d9709
L		 2484 /* Don't convert R_386_GOT32 since we can't tell if it is applied
2485 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
2486 if (r_type != R_386_GOT32X)
daa67607
L		 2487 continue;
2488
c175a657 2489 r_symndx = ELF32_R_SYM (irel->r_info);
02a86693 2490 if (r_symndx < symtab_hdr->sh_info)
0afcef53
L		 2491 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2492 (const Elf_Internal_Rela *) irel,
2493 FALSE);
c175a657 2494 else
02a86693 2495 {
c175a657
L		 2496 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2497 while (h->root.type == bfd_link_hash_indirect
2498 || h->root.type == bfd_link_hash_warning)
2499 h = (struct elf_link_hash_entry *) h->root.u.i.link;
daa67607
L		 2500 }
2501
02a86693 2502 /* STT_GNU_IFUNC must keep GOT32 relocations. */
c175a657 2503 if (h != NULL && h->type == STT_GNU_IFUNC)
02a86693
L		 2504 continue;
2505
c175a657
L		 2506 converted = FALSE;
2507 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
2508 irel, h, &converted, link_info))
2509 goto error_return;
bae420ef 2510
c175a657 2511 if (converted)
02a86693 2512 {
c175a657
L		 2513 changed = converted;
2514 if (h)
02a86693 2515 {
c175a657
L		 2516 if (h->got.refcount > 0)
2517 h->got.refcount -= 1;
02a86693 2518 }
c175a657 2519 else
02a86693 2520 {
c175a657
L		 2521 if (local_got_refcounts != NULL
2522 && local_got_refcounts[r_symndx] > 0)
2523 local_got_refcounts[r_symndx] -= 1;
02a86693 2524 }
daa67607
L		 2525 }
2526 }
2527
2528 if (contents != NULL
2529 && elf_section_data (sec)->this_hdr.contents != contents)
2530 {
c175a657 2531 if (!changed && !link_info->keep_memory)
daa67607
L		 2532 free (contents);
2533 else
2534 {
2535 /* Cache the section contents for elf_link_input_bfd. */
2536 elf_section_data (sec)->this_hdr.contents = contents;
2537 }
2538 }
2539
2540 if (elf_section_data (sec)->relocs != internal_relocs)
2541 {
c175a657 2542 if (!changed)
daa67607
L		 2543 free (internal_relocs);
2544 else
2545 elf_section_data (sec)->relocs = internal_relocs;
2546 }
2547
2548 return TRUE;
2549
2550 error_return:
2551 if (contents != NULL
2552 && elf_section_data (sec)->this_hdr.contents != contents)
2553 free (contents);
2554 if (internal_relocs != NULL
2555 && elf_section_data (sec)->relocs != internal_relocs)
2556 free (internal_relocs);
2557 return FALSE;
2558}
2559
252b5132
RH		 2560/* Set the sizes of the dynamic sections. */
2561
b34976b6 2562static bfd_boolean
23209a78 2563elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
252b5132 2564{
0afcef53 2565 struct elf_x86_link_hash_table *htab;
252b5132
RH		 2566 bfd *dynobj;
2567 asection *s;
b34976b6 2568 bfd_boolean relocs;
0c715baa 2569 bfd *ibfd;
252b5132 2570
0afcef53 2571 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2572 if (htab == NULL)
2573 return FALSE;
ebe50bae 2574 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 2575 if (dynobj == NULL)
2576 abort ();
252b5132 2577
0c715baa
AM		 2578 /* Set up .got offsets for local syms, and space for local dynamic
2579 relocs. */
c72f2fb2 2580 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
161d71a6
L		 2581 {
2582 bfd_signed_vma *local_got;
2583 bfd_signed_vma *end_local_got;
13ae64f3 2584 char *local_tls_type;
67a4f2b7 2585 bfd_vma *local_tlsdesc_gotent;
161d71a6
L		 2586 bfd_size_type locsymcount;
2587 Elf_Internal_Shdr *symtab_hdr;
2588 asection *srel;
6725bdbf 2589
0ffa91dd 2590 if (! is_i386_elf (ibfd))
161d71a6 2591 continue;
6725bdbf 2592
0c715baa
AM		 2593 for (s = ibfd->sections; s != NULL; s = s->next)
2594 {
e03a8ed8 2595 struct elf_dyn_relocs *p;
0c715baa 2596
02a86693 2597 if (!elf_i386_convert_load (ibfd, s, info))
daa67607
L		 2598 return FALSE;
2599
e03a8ed8 2600 for (p = ((struct elf_dyn_relocs *)
e81d3500 2601 elf_section_data (s)->local_dynrel);
ec338859
AM		 2602 p != NULL;
2603 p = p->next)
0c715baa 2604 {
ec338859
AM		 2605 if (!bfd_is_abs_section (p->sec)
2606 && bfd_is_abs_section (p->sec->output_section))
2607 {
2608 /* Input section has been discarded, either because
2609 it is a copy of a linkonce section or due to
2610 linker script /DISCARD/, so we'll be discarding
2611 the relocs too. */
2612 }
f604c2a2
L		 2613 else if ((get_elf_i386_backend_data (output_bfd)->os
2614 == is_vxworks)
3348747a
NS		 2615 && strcmp (p->sec->output_section->name,
2616 ".tls_vars") == 0)
2617 {
2618 /* Relocations in vxworks .tls_vars sections are
2619 handled specially by the loader. */
2620 }
248866a8 2621 else if (p->count != 0)
ec338859
AM		 2622 {
2623 srel = elf_section_data (p->sec)->sreloc;
eea6121a 2624 srel->size += p->count * sizeof (Elf32_External_Rel);
4b819e1f
L		 2625 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2626 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 2627 {
2628 info->flags |= DF_TEXTREL;
0e1862bb 2629 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd 2630 || info->error_textrel)
695344c0 2631 /* xgettext:c-format */
1952c5cd 2632 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
b70321a2 2633 p->sec->owner, p->sec);
b70321a2 2634 }
ec338859 2635 }
0c715baa
AM		 2636 }
2637 }
2638
2639 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 2640 if (!local_got)
2641 continue;
6725bdbf 2642
0ffa91dd 2643 symtab_hdr = &elf_symtab_hdr (ibfd);
161d71a6
L		 2644 locsymcount = symtab_hdr->sh_info;
2645 end_local_got = local_got + locsymcount;
0afcef53
L		 2646 local_tls_type = elf_x86_local_got_tls_type (ibfd);
2647 local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 2648 s = htab->elf.sgot;
2649 srel = htab->elf.srelgot;
67a4f2b7
AO		 2650 for (; local_got < end_local_got;
2651 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
161d71a6 2652 {
67a4f2b7 2653 *local_tlsdesc_gotent = (bfd_vma) -1;
161d71a6 2654 if (*local_got > 0)
6725bdbf 2655 {
67a4f2b7
AO		 2656 if (GOT_TLS_GDESC_P (*local_tls_type))
2657 {
6de2ae4a 2658 *local_tlsdesc_gotent = htab->elf.sgotplt->size
67a4f2b7 2659 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2660 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 2661 *local_got = (bfd_vma) -2;
2662 }
2663 if (! GOT_TLS_GDESC_P (*local_tls_type)
2664 || GOT_TLS_GD_P (*local_tls_type))
2665 {
2666 *local_got = s->size;
2667 s->size += 4;
2668 if (GOT_TLS_GD_P (*local_tls_type)
2669 || *local_tls_type == GOT_TLS_IE_BOTH)
2670 s->size += 4;
2671 }
0e1862bb 2672 if (bfd_link_pic (info)
67a4f2b7 2673 || GOT_TLS_GD_ANY_P (*local_tls_type)
37e55690
JJ		 2674 || (*local_tls_type & GOT_TLS_IE))
2675 {
2676 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 2677 srel->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 2678 else if (GOT_TLS_GD_P (*local_tls_type)
2679 || ! GOT_TLS_GDESC_P (*local_tls_type))
eea6121a 2680 srel->size += sizeof (Elf32_External_Rel);
67a4f2b7 2681 if (GOT_TLS_GDESC_P (*local_tls_type))
6de2ae4a 2682 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
37e55690 2683 }
6725bdbf 2684 }
161d71a6
L		 2685 else
2686 *local_got = (bfd_vma) -1;
6725bdbf 2687 }
252b5132 2688 }
6725bdbf 2689
0afcef53 2690 if (htab->tls_ld_or_ldm_got.refcount > 0)
13ae64f3
JJ		 2691 {
2692 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2693 relocs. */
0afcef53 2694 htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
6de2ae4a
L		 2695 htab->elf.sgot->size += 8;
2696 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 2697 }
2698 else
0afcef53 2699 htab->tls_ld_or_ldm_got.offset = -1;
13ae64f3 2700
0c715baa
AM		 2701 /* Allocate global sym .plt and .got entries, and space for global
2702 sym dynamic relocs. */
eb4ff4d6 2703 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
252b5132 2704
c25bc9fc
L		 2705 /* Allocate .plt and .got entries, and space for local symbols. */
2706 htab_traverse (htab->loc_hash_table,
2707 elf_i386_allocate_local_dynrelocs,
2708 info);
2709
67a4f2b7
AO		 2710 /* For every jump slot reserved in the sgotplt, reloc_count is
2711 incremented. However, when we reserve space for TLS descriptors,
2712 it's not incremented, so in order to compute the space reserved
2713 for them, it suffices to multiply the reloc count by the jump
e1f98742 2714 slot size.
caa0075c 2715
e1f98742
L		 2716 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2717 so that R_386_IRELATIVE entries come last. */
6de2ae4a 2718 if (htab->elf.srelplt)
e1f98742 2719 {
765e526c
L		 2720 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2721 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
e1f98742
L		 2722 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2723 }
2724 else if (htab->elf.irelplt)
2725 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2726
67a4f2b7 2727
a7b16ceb
L		 2728 if (htab->elf.sgotplt)
2729 {
2730 /* Don't allocate .got.plt section if there are no GOT nor PLT
9a2a56cc 2731 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 2732 if ((htab->elf.hgot == NULL
2733 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 2734 && (htab->elf.sgotplt->size
2735 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 2736 && (htab->elf.splt == NULL
2737 || htab->elf.splt->size == 0)
2738 && (htab->elf.sgot == NULL
2739 || htab->elf.sgot->size == 0)
2740 && (htab->elf.iplt == NULL
2741 || htab->elf.iplt->size == 0)
2742 && (htab->elf.igotplt == NULL
2743 || htab->elf.igotplt->size == 0))
2744 htab->elf.sgotplt->size = 0;
2745 }
2746
fff53dae
L		 2747 if (_bfd_elf_eh_frame_present (info))
2748 {
2749 if (htab->plt_eh_frame != NULL
2750 && htab->elf.splt != NULL
2751 && htab->elf.splt->size != 0
2752 && !bfd_is_abs_section (htab->elf.splt->output_section))
765e526c 2753 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
fff53dae
L		 2754
2755 if (htab->plt_got_eh_frame != NULL
2756 && htab->plt_got != NULL
2757 && htab->plt_got->size != 0
2758 && !bfd_is_abs_section (htab->plt_got->output_section))
2759 htab->plt_got_eh_frame->size
765e526c 2760 = htab->non_lazy_plt->eh_frame_plt_size;
ee2fdd6f
L		 2761
2762 /* Unwind info for the second PLT and .plt.got sections are
2763 identical. */
2764 if (htab->plt_second_eh_frame != NULL
2765 && htab->plt_second != NULL
2766 && htab->plt_second->size != 0
2767 && !bfd_is_abs_section (htab->plt_second->output_section))
2768 htab->plt_second_eh_frame->size
765e526c 2769 = htab->non_lazy_plt->eh_frame_plt_size;
fff53dae 2770 }
9a2a56cc 2771
5a15f56f
AM		 2772 /* We now have determined the sizes of the various dynamic sections.
2773 Allocate memory for them. */
b34976b6 2774 relocs = FALSE;
252b5132
RH		 2775 for (s = dynobj->sections; s != NULL; s = s->next)
2776 {
eac338cf
PB		 2777 bfd_boolean strip_section = TRUE;
2778
252b5132
RH		 2779 if ((s->flags & SEC_LINKER_CREATED) == 0)
2780 continue;
2781
6de2ae4a 2782 if (s == htab->elf.splt
9a2a56cc 2783 || s == htab->elf.sgot)
252b5132 2784 {
6725bdbf
AM		 2785 /* Strip this section if we don't need it; see the
2786 comment below. */
eac338cf
PB		 2787 /* We'd like to strip these sections if they aren't needed, but if
2788 we've exported dynamic symbols from them we must leave them.
2789 It's too late to tell BFD to get rid of the symbols. */
2790
7325306f 2791 if (htab->elf.hplt != NULL)
eac338cf 2792 strip_section = FALSE;
252b5132 2793 }
9a2a56cc
AM		 2794 else if (s == htab->elf.sgotplt
2795 || s == htab->elf.iplt
2796 || s == htab->elf.igotplt
ee2fdd6f 2797 || s == htab->plt_second
dd7e64d4 2798 || s == htab->plt_got
9a2a56cc 2799 || s == htab->plt_eh_frame
fff53dae 2800 || s == htab->plt_got_eh_frame
ee2fdd6f 2801 || s == htab->plt_second_eh_frame
5474d94f
AM		 2802 || s == htab->elf.sdynbss
2803 || s == htab->elf.sdynrelro)
9a2a56cc
AM		 2804 {
2805 /* Strip these too. */
2806 }
0112cd26 2807 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
252b5132 2808 {
6de2ae4a
L		 2809 if (s->size != 0
2810 && s != htab->elf.srelplt
765e526c 2811 && s != htab->srelplt2)
b34976b6 2812 relocs = TRUE;
252b5132 2813
0ac8d2ca
AM		 2814 /* We use the reloc_count field as a counter if we need
2815 to copy relocs into the output file. */
5ae0bfb6 2816 s->reloc_count = 0;
252b5132 2817 }
6725bdbf 2818 else
252b5132
RH		 2819 {
2820 /* It's not one of our sections, so don't allocate space. */
2821 continue;
2822 }
2823
c456f082 2824 if (s->size == 0)
252b5132 2825 {
0ac8d2ca
AM		 2826 /* If we don't need this section, strip it from the
2827 output file. This is mostly to handle .rel.bss and
2828 .rel.plt. We must create both sections in
2829 create_dynamic_sections, because they must be created
2830 before the linker maps input sections to output
2831 sections. The linker does that before
2832 adjust_dynamic_symbol is called, and it is that
2833 function which decides whether anything needs to go
2834 into these sections. */
c456f082
AM		 2835 if (strip_section)
2836 s->flags |= SEC_EXCLUDE;
252b5132
RH		 2837 continue;
2838 }
2839
c456f082
AM		 2840 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2841 continue;
2842
f69da49f
AM		 2843 /* Allocate memory for the section contents. We use bfd_zalloc
2844 here in case unused entries are not reclaimed before the
2845 section's contents are written out. This should not happen,
2846 but this way if it does, we get a R_386_NONE reloc instead
2847 of garbage. */
a50b1753 2848 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
6725bdbf 2849 if (s->contents == NULL)
b34976b6 2850 return FALSE;
252b5132
RH		 2851 }
2852
e41b3a13 2853 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 2854 && htab->plt_eh_frame->contents != NULL)
2855 {
f129e49f 2856 memcpy (htab->plt_eh_frame->contents,
765e526c 2857 htab->plt.eh_frame_plt,
f129e49f 2858 htab->plt_eh_frame->size);
9a2a56cc
AM		 2859 bfd_put_32 (dynobj, htab->elf.splt->size,
2860 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2861 }
e41b3a13 2862
fff53dae
L		 2863 if (htab->plt_got_eh_frame != NULL
2864 && htab->plt_got_eh_frame->contents != NULL)
2865 {
2866 memcpy (htab->plt_got_eh_frame->contents,
765e526c 2867 htab->non_lazy_plt->eh_frame_plt,
fff53dae
L		 2868 htab->plt_got_eh_frame->size);
2869 bfd_put_32 (dynobj, htab->plt_got->size,
2870 (htab->plt_got_eh_frame->contents
2871 + PLT_FDE_LEN_OFFSET));
2872 }
2873
ee2fdd6f
L		 2874 if (htab->plt_second_eh_frame != NULL
2875 && htab->plt_second_eh_frame->contents != NULL)
2876 {
2877 memcpy (htab->plt_second_eh_frame->contents,
765e526c 2878 htab->non_lazy_plt->eh_frame_plt,
ee2fdd6f
L		 2879 htab->plt_second_eh_frame->size);
2880 bfd_put_32 (dynobj, htab->plt_second->size,
2881 (htab->plt_second_eh_frame->contents
2882 + PLT_FDE_LEN_OFFSET));
2883 }
2884
ebe50bae 2885 if (htab->elf.dynamic_sections_created)
252b5132
RH		 2886 {
2887 /* Add some entries to the .dynamic section. We fill in the
2888 values later, in elf_i386_finish_dynamic_sections, but we
2889 must add the entries now so that we get the correct size for
2890 the .dynamic section. The DT_DEBUG entry is filled in by the
2891 dynamic linker and used by the debugger. */
dc810e39 2892#define add_dynamic_entry(TAG, VAL) \
5a580b3a 2893 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 2894
0e1862bb 2895 if (bfd_link_executable (info))
252b5132 2896 {
dc810e39 2897 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2898 return FALSE;
252b5132
RH		 2899 }
2900
6de2ae4a 2901 if (htab->elf.splt->size != 0)
252b5132 2902 {
7c1e8d3e
L		 2903 /* DT_PLTGOT is used by prelink even if there is no PLT
2904 relocation. */
2905 if (!add_dynamic_entry (DT_PLTGOT, 0))
b34976b6 2906 return FALSE;
97d343d4 2907 }
7c1e8d3e 2908
97d343d4
L		 2909 if (htab->elf.srelplt->size != 0)
2910 {
2911 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2912 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2913 || !add_dynamic_entry (DT_JMPREL, 0))
2914 return FALSE;
252b5132
RH		 2915 }
2916
2917 if (relocs)
2918 {
dc810e39
AM		 2919 if (!add_dynamic_entry (DT_REL, 0)
2920 || !add_dynamic_entry (DT_RELSZ, 0)
2921 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 2922 return FALSE;
252b5132 2923
0c715baa
AM		 2924 /* If any dynamic relocs apply to a read-only section,
2925 then we need a DT_TEXTREL entry. */
248866a8 2926 if ((info->flags & DF_TEXTREL) == 0)
eb4ff4d6 2927 elf_link_hash_traverse (&htab->elf,
0afcef53
L		 2928 _bfd_x86_elf_readonly_dynrelocs,
2929 info);
0c715baa
AM		 2930
2931 if ((info->flags & DF_TEXTREL) != 0)
2932 {
2df3368d 2933 if (htab->readonly_dynrelocs_against_ifunc)
8efa2874
L		 2934 {
2935 info->callbacks->einfo
2936 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
2937 bfd_set_error (bfd_error_bad_value);
2938 return FALSE;
2939 }
2940
0c715baa 2941 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2942 return FALSE;
0c715baa 2943 }
252b5132 2944 }
f604c2a2 2945 if (get_elf_i386_backend_data (output_bfd)->os == is_vxworks
7a2b07ff
NS		 2946 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2947 return FALSE;
252b5132 2948 }
dc810e39 2949#undef add_dynamic_entry
252b5132 2950
b34976b6 2951 return TRUE;
252b5132
RH		 2952}
2953
38701953
AM		 2954/* Set the correct type for an x86 ELF section. We do this by the
2955 section name, which is a hack, but ought to work. */
2956
b34976b6 2957static bfd_boolean
55fd94b0
AM		 2958elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2959 Elf_Internal_Shdr *hdr,
2960 asection *sec)
38701953 2961{
91d6fa6a 2962 const char *name;
38701953
AM		 2963
2964 name = bfd_get_section_name (abfd, sec);
2965
2966 /* This is an ugly, but unfortunately necessary hack that is
2967 needed when producing EFI binaries on x86. It tells
2968 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2969 containing ELF relocation info. We need this hack in order to
2970 be able to generate ELF binaries that can be translated into
2971 EFI applications (which are essentially COFF objects). Those
2972 files contain a COFF ".reloc" section inside an ELFNN object,
2973 which would normally cause BFD to segfault because it would
2974 attempt to interpret this section as containing relocation
2975 entries for section "oc". With this hack enabled, ".reloc"
2976 will be treated as a normal data section, which will avoid the
2977 segfault. However, you won't be able to create an ELFNN binary
2978 with a section named "oc" that needs relocations, but that's
2979 the kind of ugly side-effects you get when detecting section
2980 types based on their names... In practice, this limitation is
2981 unlikely to bite. */
2982 if (strcmp (name, ".reloc") == 0)
2983 hdr->sh_type = SHT_PROGBITS;
2984
b34976b6 2985 return TRUE;
38701953
AM		 2986}
2987
13ae64f3
JJ		 2988/* Return the relocation value for @tpoff relocation
2989 if STT_TLS virtual address is ADDRESS. */
2990
2991static bfd_vma
eb4ff4d6 2992elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 2993{
e1918d23 2994 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 2995 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2996 bfd_vma static_tls_size;
13ae64f3 2997
e1918d23
AM		 2998 /* If tls_sec is NULL, we should have signalled an error already. */
2999 if (htab->tls_sec == NULL)
6a30718d 3000 return 0;
7dc98aea
RO		 3001
3002 /* Consider special static TLS alignment requirements. */
3003 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3004 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 3005}
3006
252b5132
RH		 3007/* Relocate an i386 ELF section. */
3008
b34976b6 3009static bfd_boolean
55fd94b0
AM		 3010elf_i386_relocate_section (bfd *output_bfd,
3011 struct bfd_link_info *info,
3012 bfd *input_bfd,
3013 asection *input_section,
3014 bfd_byte *contents,
3015 Elf_Internal_Rela *relocs,
3016 Elf_Internal_Sym *local_syms,
3017 asection **local_sections)
252b5132 3018{
0afcef53 3019 struct elf_x86_link_hash_table *htab;
252b5132
RH		 3020 Elf_Internal_Shdr *symtab_hdr;
3021 struct elf_link_hash_entry **sym_hashes;
3022 bfd_vma *local_got_offsets;
67a4f2b7 3023 bfd_vma *local_tlsdesc_gotents;
252b5132 3024 Elf_Internal_Rela *rel;
60f2e42e 3025 Elf_Internal_Rela *wrel;
252b5132 3026 Elf_Internal_Rela *relend;
3348747a 3027 bfd_boolean is_vxworks_tls;
25e762b9 3028 unsigned plt_entry_size;
252b5132 3029
0ffa91dd 3030 BFD_ASSERT (is_i386_elf (input_bfd));
6bbec505 3031
c337a162
L		 3032 /* Skip if check_relocs failed. */
3033 if (input_section->check_relocs_failed)
3034 return FALSE;
3035
0afcef53 3036 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 3037 if (htab == NULL)
3038 return FALSE;
0ffa91dd 3039 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 3040 sym_hashes = elf_sym_hashes (input_bfd);
3041 local_got_offsets = elf_local_got_offsets (input_bfd);
0afcef53 3042 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 3043 /* We have to handle relocations in vxworks .tls_vars sections
3044 specially, because the dynamic loader is 'weird'. */
f604c2a2
L		 3045 is_vxworks_tls = ((get_elf_i386_backend_data (output_bfd)->os
3046 == is_vxworks)
0e1862bb 3047 && bfd_link_pic (info)
3348747a
NS		 3048 && !strcmp (input_section->output_section->name,
3049 ".tls_vars"));
252b5132 3050
0afcef53 3051 _bfd_x86_elf_set_tls_module_base (info);
9f03412a 3052
765e526c 3053 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 3054
60f2e42e 3055 rel = wrel = relocs;
252b5132 3056 relend = relocs + input_section->reloc_count;
60f2e42e 3057 for (; rel < relend; wrel++, rel++)
252b5132 3058 {
13ae64f3 3059 unsigned int r_type;
252b5132
RH		 3060 reloc_howto_type *howto;
3061 unsigned long r_symndx;
3062 struct elf_link_hash_entry *h;
0afcef53 3063 struct elf_x86_link_hash_entry *eh;
252b5132
RH		 3064 Elf_Internal_Sym *sym;
3065 asection *sec;
dd7e64d4 3066 bfd_vma off, offplt, plt_offset;
252b5132 3067 bfd_vma relocation;
b34976b6 3068 bfd_boolean unresolved_reloc;
252b5132 3069 bfd_reloc_status_type r;
1b452ec6 3070 unsigned int indx;
13ae64f3 3071 int tls_type;
1788fc08 3072 bfd_vma st_size;
dd7e64d4 3073 asection *resolved_plt;
aec6b87e 3074 bfd_boolean resolved_to_zero;
e133d005 3075 bfd_boolean relative_reloc;
252b5132
RH		 3076
3077 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 3078 if (r_type == R_386_GNU_VTINHERIT
3079 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 3080 {
3081 if (wrel != rel)
3082 *wrel = *rel;
3083 continue;
3084 }
dc47f327 3085
55fd94b0 3086 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 3087 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3088 >= R_386_ext - R_386_standard)
3089 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520 3090 >= R_386_ext2 - R_386_ext))
47aeb64c
NC		 3091 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
3092
1b452ec6 3093 howto = elf_howto_table + indx;
252b5132
RH		 3094
3095 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 3096 h = NULL;
3097 sym = NULL;
3098 sec = NULL;
b34976b6 3099 unresolved_reloc = FALSE;
252b5132
RH		 3100 if (r_symndx < symtab_hdr->sh_info)
3101 {
3102 sym = local_syms + r_symndx;
3103 sec = local_sections[r_symndx];
3104 relocation = (sec->output_section->vma
3105 + sec->output_offset
3106 + sym->st_value);
1788fc08 3107 st_size = sym->st_size;
ab96bf03
AM		 3108
3109 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3110 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 3111 || (bfd_link_relocatable (info)
ab96bf03 3112 && sec->output_offset != 0)))
f8df10f4 3113 {
f8df10f4 3114 bfd_vma addend;
4a335f3d 3115 bfd_byte *where = contents + rel->r_offset;
f8df10f4 3116
4a335f3d 3117 switch (howto->size)
f8df10f4 3118 {
4a335f3d
AM		 3119 case 0:
3120 addend = bfd_get_8 (input_bfd, where);
3121 if (howto->pc_relative)
3122 {
3123 addend = (addend ^ 0x80) - 0x80;
3124 addend += 1;
3125 }
3126 break;
3127 case 1:
3128 addend = bfd_get_16 (input_bfd, where);
3129 if (howto->pc_relative)
3130 {
3131 addend = (addend ^ 0x8000) - 0x8000;
3132 addend += 2;
3133 }
3134 break;
3135 case 2:
3136 addend = bfd_get_32 (input_bfd, where);
3137 if (howto->pc_relative)
3138 {
3139 addend = (addend ^ 0x80000000) - 0x80000000;
3140 addend += 4;
3141 }
3142 break;
3143 default:
3144 abort ();
f8df10f4
JJ		 3145 }
3146
0e1862bb 3147 if (bfd_link_relocatable (info))
ab96bf03
AM		 3148 addend += sec->output_offset;
3149 else
3150 {
3151 asection *msec = sec;
3152 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3153 addend);
3154 addend -= relocation;
3155 addend += msec->output_section->vma + msec->output_offset;
3156 }
4a335f3d
AM		 3157
3158 switch (howto->size)
3159 {
3160 case 0:
16a10388 3161 /* FIXME: overflow checks. */
4a335f3d
AM		 3162 if (howto->pc_relative)
3163 addend -= 1;
3164 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 3165 break;
3166 case 1:
3167 if (howto->pc_relative)
3168 addend -= 2;
3169 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 3170 break;
3171 case 2:
3172 if (howto->pc_relative)
3173 addend -= 4;
3174 bfd_put_32 (input_bfd, addend, where);
3175 break;
3176 }
f8df10f4 3177 }
0e1862bb 3178 else if (!bfd_link_relocatable (info)
1f85278f 3179 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 3180 {
3181 /* Relocate against local STT_GNU_IFUNC symbol. */
0afcef53
L		 3182 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
3183 FALSE);
c25bc9fc
L		 3184 if (h == NULL)
3185 abort ();
3186
23209a78 3187 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3188 h->root.u.def.value = sym->st_value;
3189 h->root.u.def.section = sec;
3190 }
252b5132
RH		 3191 }
3192 else
3193 {
3d540e93 3194 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 3195 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 3196
b2a8e766
AM		 3197 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3198 r_symndx, symtab_hdr, sym_hashes,
3199 h, sec, relocation,
62d887d4 3200 unresolved_reloc, warned, ignored);
1788fc08 3201 st_size = h->size;
252b5132
RH		 3202 }
3203
dbaa2011 3204 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 3205 {
3206 _bfd_clear_contents (howto, input_bfd, input_section,
3207 contents + rel->r_offset);
3208 wrel->r_offset = rel->r_offset;
3209 wrel->r_info = 0;
3210 wrel->r_addend = 0;
3211
3212 /* For ld -r, remove relocations in debug sections against
3213 sections defined in discarded sections. Not done for
3214 eh_frame editing code expects to be present. */
3215 if (bfd_link_relocatable (info)
3216 && (input_section->flags & SEC_DEBUGGING))
3217 wrel--;
3218
3219 continue;
3220 }
9635fe29 3221
0e1862bb 3222 if (bfd_link_relocatable (info))
2d5da473
L		 3223 {
3224 if (wrel != rel)
3225 *wrel = *rel;
3226 continue;
3227 }
ab96bf03 3228
0afcef53 3229 eh = (struct elf_x86_link_hash_entry *) h;
ee2fdd6f 3230
cbe950e9
L		 3231 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3232 it here if it is defined in a non-shared object. */
3233 if (h != NULL
3234 && h->type == STT_GNU_IFUNC
3235 && h->def_regular)
3236 {
ee2fdd6f 3237 asection *gotplt, *base_got;
cbe950e9 3238 bfd_vma plt_index;
4c544807 3239 const char *name;
cbe950e9 3240
97dc35c8
L		 3241 if ((input_section->flags & SEC_ALLOC) == 0)
3242 {
3243 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3244 sections because such sections are not SEC_ALLOC and
3245 thus ld.so will not process them. */
3246 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 3247 continue;
97dc35c8
L		 3248 abort ();
3249 }
cbe950e9
L		 3250
3251 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3252 if (htab->elf.splt != NULL)
cbe950e9 3253 {
ee2fdd6f
L		 3254 if (htab->plt_second != NULL)
3255 {
3256 resolved_plt = htab->plt_second;
3257 plt_offset = eh->plt_second.offset;
3258 }
3259 else
3260 {
3261 resolved_plt = htab->elf.splt;
3262 plt_offset = h->plt.offset;
3263 }
6de2ae4a 3264 gotplt = htab->elf.sgotplt;
cbe950e9
L		 3265 }
3266 else
3267 {
ee2fdd6f
L		 3268 resolved_plt = htab->elf.iplt;
3269 plt_offset = h->plt.offset;
6de2ae4a 3270 gotplt = htab->elf.igotplt;
cbe950e9
L		 3271 }
3272
cbe950e9
L		 3273 switch (r_type)
3274 {
3275 default:
233cc9c1 3276 break;
cbe950e9
L		 3277
3278 case R_386_GOT32:
02a86693 3279 case R_386_GOT32X:
6de2ae4a 3280 base_got = htab->elf.sgot;
cbe950e9
L		 3281 off = h->got.offset;
3282
7afd84dc 3283 if (base_got == NULL)
cbe950e9
L		 3284 abort ();
3285
7afd84dc 3286 if (off == (bfd_vma) -1)
cbe950e9 3287 {
7afd84dc
L		 3288 /* We can't use h->got.offset here to save state, or
3289 even just remember the offset, as finish_dynamic_symbol
3290 would use that as offset into .got. */
6bbec505 3291
233cc9c1
L		 3292 if (h->plt.offset == (bfd_vma) -1)
3293 abort ();
3294
6de2ae4a 3295 if (htab->elf.splt != NULL)
7afd84dc 3296 {
f604c2a2 3297 plt_index = (h->plt.offset / plt_entry_size
765e526c 3298 - htab->plt.has_plt0);
7afd84dc 3299 off = (plt_index + 3) * 4;
6de2ae4a 3300 base_got = htab->elf.sgotplt;
7afd84dc 3301 }
cbe950e9
L		 3302 else
3303 {
25e762b9 3304 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3305 off = plt_index * 4;
6de2ae4a 3306 base_got = htab->elf.igotplt;
7afd84dc
L		 3307 }
3308
3309 if (h->dynindx == -1
3310 || h->forced_local
3311 || info->symbolic)
3312 {
3313 /* This references the local defitionion. We must
3314 initialize this entry in the global offset table.
3315 Since the offset must always be a multiple of 8,
3316 we use the least significant bit to record
3317 whether we have initialized it already.
3318
3319 When doing a dynamic link, we create a .rela.got
3320 relocation entry to initialize the value. This
3321 is done in the finish_dynamic_symbol routine. */
3322 if ((off & 1) != 0)
3323 off &= ~1;
3324 else
3325 {
3326 bfd_put_32 (output_bfd, relocation,
3327 base_got->contents + off);
3328 h->got.offset |= 1;
3329 }
cbe950e9 3330 }
cbe950e9 3331
7afd84dc 3332 relocation = off;
7afd84dc
L		 3333 }
3334 else
ca8c86ef
L		 3335 relocation = (base_got->output_section->vma
3336 + base_got->output_offset + off
3337 - gotplt->output_section->vma
3338 - gotplt->output_offset);
3339
2a568401
L		 3340 if (rel->r_offset > 1
3341 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3342 && *(contents + rel->r_offset - 2) != 0x8d)
712ec279
L		 3343 {
3344 if (bfd_link_pic (info))
3345 goto disallow_got32;
3346
3347 /* Add the GOT base if there is no base register. */
3348 relocation += (gotplt->output_section->vma
3349 + gotplt->output_offset);
3350 }
3351 else if (htab->elf.splt == NULL)
3352 {
3353 /* Adjust for static executables. */
3354 relocation += gotplt->output_offset;
3355 }
0018b0a3 3356
cbe950e9 3357 goto do_relocation;
233cc9c1
L		 3358 }
3359
3360 if (h->plt.offset == (bfd_vma) -1)
3361 {
3362 /* Handle static pointers of STT_GNU_IFUNC symbols. */
3363 if (r_type == R_386_32
3364 && (input_section->flags & SEC_CODE) == 0)
3365 goto do_ifunc_pointer;
3366 goto bad_ifunc_reloc;
3367 }
3368
ee2fdd6f
L		 3369 relocation = (resolved_plt->output_section->vma
3370 + resolved_plt->output_offset + plt_offset);
233cc9c1
L		 3371
3372 switch (r_type)
3373 {
3374 default:
3375bad_ifunc_reloc:
3376 if (h->root.root.string)
3377 name = h->root.root.string;
3378 else
3379 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3380 NULL);
4eca0228 3381 _bfd_error_handler
695344c0 3382 /* xgettext:c-format */
233cc9c1
L		 3383 (_("%B: relocation %s against STT_GNU_IFUNC "
3384 "symbol `%s' isn't supported"), input_bfd,
3385 howto->name, name);
3386 bfd_set_error (bfd_error_bad_value);
3387 return FALSE;
3388
3389 case R_386_32:
3390 /* Generate dynamic relcoation only when there is a
3391 non-GOT reference in a shared object. */
3392 if ((bfd_link_pic (info) && h->non_got_ref)
3393 || h->plt.offset == (bfd_vma) -1)
3394 {
3395 Elf_Internal_Rela outrel;
3396 asection *sreloc;
3397 bfd_vma offset;
3398
3399do_ifunc_pointer:
3400 /* Need a dynamic relocation to get the real function
3401 adddress. */
3402 offset = _bfd_elf_section_offset (output_bfd,
3403 info,
3404 input_section,
3405 rel->r_offset);
3406 if (offset == (bfd_vma) -1
3407 || offset == (bfd_vma) -2)
3408 abort ();
3409
3410 outrel.r_offset = (input_section->output_section->vma
3411 + input_section->output_offset
3412 + offset);
3413
3414 if (h->dynindx == -1
3415 || h->forced_local
3416 || bfd_link_executable (info))
3417 {
6322e5c5
L		 3418 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3419 h->root.root.string,
3420 h->root.u.def.section->owner);
3421
233cc9c1
L		 3422 /* This symbol is resolved locally. */
3423 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3424 bfd_put_32 (output_bfd,
3425 (h->root.u.def.value
3426 + h->root.u.def.section->output_section->vma
3427 + h->root.u.def.section->output_offset),
3428 contents + offset);
3429 }
3430 else
3431 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3432
3433 /* Dynamic relocations are stored in
3434 1. .rel.ifunc section in PIC object.
3435 2. .rel.got section in dynamic executable.
3436 3. .rel.iplt section in static executable. */
3437 if (bfd_link_pic (info))
3438 sreloc = htab->elf.irelifunc;
3439 else if (htab->elf.splt != NULL)
3440 sreloc = htab->elf.srelgot;
3441 else
3442 sreloc = htab->elf.irelplt;
3443 elf_append_rel (output_bfd, sreloc, &outrel);
3444
3445 /* If this reloc is against an external symbol, we
3446 do not want to fiddle with the addend. Otherwise,
3447 we need to include the symbol value so that it
3448 becomes an addend for the dynamic reloc. For an
3449 internal symbol, we have updated addend. */
3450 continue;
3451 }
3452 /* FALLTHROUGH */
3453 case R_386_PC32:
3454 case R_386_PLT32:
3455 goto do_relocation;
cbe950e9
L		 3456
3457 case R_386_GOTOFF:
3458 relocation -= (gotplt->output_section->vma
3459 + gotplt->output_offset);
3460 goto do_relocation;
3461 }
3462 }
3463
aec6b87e 3464 resolved_to_zero = (eh != NULL
e62b9723 3465 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
0afcef53 3466 I386_ELF_DATA,
e62b9723
L		 3467 eh->has_got_reloc,
3468 eh));
aec6b87e 3469
252b5132
RH		 3470 switch (r_type)
3471 {
02a86693
L		 3472 case R_386_GOT32X:
3473 /* Avoid optimizing _DYNAMIC since ld.so may use its
3474 link-time address. */
3475 if (h == htab->elf.hdynamic)
3476 goto r_386_got32;
3477
3478 if (bfd_link_pic (info))
3479 {
3480 /* It is OK to convert mov to lea and convert indirect
3481 branch to direct branch. It is OK to convert adc,
3482 add, and, cmp, or, sbb, sub, test, xor only when PIC
3483 is false. */
02e2aef8
L		 3484 unsigned int opcode, addend;
3485 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3486 if (addend != 0)
3487 goto r_386_got32;
3488 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
02a86693
L		 3489 if (opcode != 0x8b && opcode != 0xff)
3490 goto r_386_got32;
3491 }
3492
3493 /* Resolve "mov GOT[(%reg)], %reg",
3494 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
3495 and "binop foo@GOT[(%reg)], %reg". */
3496 if (h == NULL
3497 || (h->plt.offset == (bfd_vma) -1
3498 && h->got.offset == (bfd_vma) -1)
3499 || htab->elf.sgotplt == NULL)
3500 abort ();
3501
3502 offplt = (htab->elf.sgotplt->output_section->vma
3503 + htab->elf.sgotplt->output_offset);
3504
3505 /* It is relative to .got.plt section. */
3506 if (h->got.offset != (bfd_vma) -1)
32875eb1
L		 3507 /* Use GOT entry. Mask off the least significant bit in
3508 GOT offset which may be set by R_386_GOT32 processing
3509 below. */
02a86693
L		 3510 relocation = (htab->elf.sgot->output_section->vma
3511 + htab->elf.sgot->output_offset
32875eb1 3512 + (h->got.offset & ~1) - offplt);
02a86693
L		 3513 else
3514 /* Use GOTPLT entry. */
f604c2a2 3515 relocation = (h->plt.offset / plt_entry_size
765e526c 3516 - htab->plt.has_plt0 + 3) * 4;
02a86693
L		 3517
3518 if (!bfd_link_pic (info))
3519 {
3520 /* If not PIC, add the .got.plt section address for
a3718e9e 3521 baseless addressing. */
02a86693 3522 unsigned int modrm;
02e2aef8 3523 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
02a86693
L		 3524 if ((modrm & 0xc7) == 0x5)
3525 relocation += offplt;
3526 }
3527
3528 unresolved_reloc = FALSE;
3529 break;
3530
252b5132 3531 case R_386_GOT32:
02a86693 3532r_386_got32:
252b5132
RH		 3533 /* Relocation is to the entry for this symbol in the global
3534 offset table. */
6de2ae4a 3535 if (htab->elf.sgot == NULL)
ffb2e45b 3536 abort ();
252b5132 3537
e133d005 3538 relative_reloc = FALSE;
252b5132
RH		 3539 if (h != NULL)
3540 {
b34976b6 3541 bfd_boolean dyn;
252b5132
RH		 3542
3543 off = h->got.offset;
ebe50bae 3544 dyn = htab->elf.dynamic_sections_created;
0e1862bb
L		 3545 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3546 bfd_link_pic (info),
3547 h)
3548 || (bfd_link_pic (info)
586119b3 3549 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 3550 || (ELF_ST_VISIBILITY (h->other)
3551 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 3552 {
3553 /* This is actually a static link, or it is a
3554 -Bsymbolic link and the symbol is defined
3555 locally, or the symbol was forced to be local
3556 because of a version file. We must initialize
3557 this entry in the global offset table. Since the
3558 offset must always be a multiple of 4, we use the
3559 least significant bit to record whether we have
3560 initialized it already.
3561
3562 When doing a dynamic link, we create a .rel.got
3563 relocation entry to initialize the value. This
3564 is done in the finish_dynamic_symbol routine. */
3565 if ((off & 1) != 0)
3566 off &= ~1;
3567 else
3568 {
3569 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3570 htab->elf.sgot->contents + off);
252b5132 3571 h->got.offset |= 1;
e133d005
L		 3572
3573 if (h->dynindx == -1
3574 && !h->forced_local
3575 && h->root.type != bfd_link_hash_undefweak
0dc9a308 3576 && bfd_link_pic (info))
e133d005
L		 3577 {
3578 /* PR ld/21402: If this symbol isn't dynamic
0dc9a308 3579 in PIC, generate R_386_RELATIVE here. */
e133d005
L		 3580 eh->no_finish_dynamic_symbol = 1;
3581 relative_reloc = TRUE;
3582 }
252b5132
RH		 3583 }
3584 }
8c694914 3585 else
b34976b6 3586 unresolved_reloc = FALSE;
252b5132
RH		 3587 }
3588 else
3589 {
ffb2e45b
AM		 3590 if (local_got_offsets == NULL)
3591 abort ();
252b5132
RH		 3592
3593 off = local_got_offsets[r_symndx];
3594
3595 /* The offset must always be a multiple of 4. We use
83be169b
AM		 3596 the least significant bit to record whether we have
3597 already generated the necessary reloc. */
252b5132
RH		 3598 if ((off & 1) != 0)
3599 off &= ~1;
3600 else
3601 {
6725bdbf 3602 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3603 htab->elf.sgot->contents + off);
e133d005 3604 local_got_offsets[r_symndx] |= 1;
252b5132 3605
0e1862bb 3606 if (bfd_link_pic (info))
e133d005 3607 relative_reloc = TRUE;
252b5132 3608 }
252b5132
RH		 3609 }
3610
e133d005
L		 3611 if (relative_reloc)
3612 {
3613 asection *s;
3614 Elf_Internal_Rela outrel;
3615
3616 s = htab->elf.srelgot;
3617 if (s == NULL)
3618 abort ();
3619
3620 outrel.r_offset = (htab->elf.sgot->output_section->vma
3621 + htab->elf.sgot->output_offset
3622 + off);
3623 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3624 elf_append_rel (output_bfd, s, &outrel);
3625 }
3626
ffb2e45b
AM		 3627 if (off >= (bfd_vma) -2)
3628 abort ();
3629
74d7f0aa
L		 3630 relocation = (htab->elf.sgot->output_section->vma
3631 + htab->elf.sgot->output_offset + off);
2a568401
L		 3632 if (rel->r_offset > 1
3633 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3634 && *(contents + rel->r_offset - 2) != 0x8d)
74d7f0aa
L		 3635 {
3636 if (bfd_link_pic (info))
3637 {
3638 /* For PIC, disallow R_386_GOT32 without a base
2a568401
L		 3639 register, except for "lea foo@GOT, %reg", since
3640 we don't know what the GOT base is. */
74d7f0aa
L		 3641 const char *name;
3642
712ec279 3643disallow_got32:
a5def14f 3644 if (h == NULL || h->root.root.string == NULL)
74d7f0aa
L		 3645 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3646 NULL);
3647 else
3648 name = h->root.root.string;
3649
4eca0228 3650 _bfd_error_handler
695344c0 3651 /* xgettext:c-format */
63a5468a
AM		 3652 (_("%B: direct GOT relocation %s against `%s'"
3653 " without base register can not be used"
3654 " when making a shared object"),
712ec279 3655 input_bfd, howto->name, name);
74d7f0aa
L		 3656 bfd_set_error (bfd_error_bad_value);
3657 return FALSE;
3658 }
3659 }
3660 else
3661 {
3662 /* Subtract the .got.plt section address only with a base
3663 register. */
3664 relocation -= (htab->elf.sgotplt->output_section->vma
3665 + htab->elf.sgotplt->output_offset);
3666 }
3667
252b5132
RH		 3668 break;
3669
3670 case R_386_GOTOFF:
3671 /* Relocation is relative to the start of the global offset
3672 table. */
3673
3d949995
L		 3674 /* Check to make sure it isn't a protected function or data
3675 symbol for shared library since it may not be local when
3676 used as function address or with copy relocation. We also
e3c0e327 3677 need to make sure that a symbol is referenced locally. */
0e1862bb 3678 if (!bfd_link_executable (info) && h)
90f487df 3679 {
41bed6dd
L		 3680 if (!h->def_regular)
3681 {
3682 const char *v;
3683
3684 switch (ELF_ST_VISIBILITY (h->other))
3685 {
3686 case STV_HIDDEN:
3687 v = _("hidden symbol");
3688 break;
3689 case STV_INTERNAL:
3690 v = _("internal symbol");
3691 break;
3692 case STV_PROTECTED:
3693 v = _("protected symbol");
3694 break;
3695 default:
3696 v = _("symbol");
3697 break;
3698 }
3699
4eca0228 3700 _bfd_error_handler
695344c0 3701 /* xgettext:c-format */
63a5468a
AM		 3702 (_("%B: relocation R_386_GOTOFF against undefined %s"
3703 " `%s' can not be used when making a shared object"),
41bed6dd
L		 3704 input_bfd, v, h->root.root.string);
3705 bfd_set_error (bfd_error_bad_value);
3706 return FALSE;
3707 }
d5597ebc 3708 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3d949995
L		 3709 && (h->type == STT_FUNC
3710 || h->type == STT_OBJECT)
41bed6dd
L		 3711 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3712 {
4eca0228 3713 _bfd_error_handler
695344c0 3714 /* xgettext:c-format */
63a5468a
AM		 3715 (_("%B: relocation R_386_GOTOFF against protected %s"
3716 " `%s' can not be used when making a shared object"),
3d949995
L		 3717 input_bfd,
3718 h->type == STT_FUNC ? "function" : "data",
3719 h->root.root.string);
41bed6dd
L		 3720 bfd_set_error (bfd_error_bad_value);
3721 return FALSE;
3722 }
90f487df
L		 3723 }
3724
8c37241b
JJ		 3725 /* Note that sgot is not involved in this
3726 calculation. We always want the start of .got.plt. If we
3727 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 3728 permitted by the ABI, we might have to change this
3729 calculation. */
6de2ae4a
L		 3730 relocation -= htab->elf.sgotplt->output_section->vma
3731 + htab->elf.sgotplt->output_offset;
252b5132
RH		 3732 break;
3733
3734 case R_386_GOTPC:
3735 /* Use global offset table as symbol value. */
6de2ae4a
L		 3736 relocation = htab->elf.sgotplt->output_section->vma
3737 + htab->elf.sgotplt->output_offset;
b34976b6 3738 unresolved_reloc = FALSE;
252b5132
RH		 3739 break;
3740
3741 case R_386_PLT32:
3742 /* Relocation is to the entry for this symbol in the
3743 procedure linkage table. */
3744
dd5724d5 3745 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 3746 without using the procedure linkage table. */
252b5132
RH		 3747 if (h == NULL)
3748 break;
3749
dd7e64d4
L		 3750 if ((h->plt.offset == (bfd_vma) -1
3751 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 3752 || htab->elf.splt == NULL)
252b5132
RH		 3753 {
3754 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 3755 happens when statically linking PIC code, or when
3756 using -Bsymbolic. */
252b5132
RH		 3757 break;
3758 }
3759
dd7e64d4
L		 3760 if (h->plt.offset != (bfd_vma) -1)
3761 {
ee2fdd6f
L		 3762 if (htab->plt_second != NULL)
3763 {
3764 resolved_plt = htab->plt_second;
3765 plt_offset = eh->plt_second.offset;
3766 }
3767 else
3768 {
3769 resolved_plt = htab->elf.splt;
3770 plt_offset = h->plt.offset;
3771 }
dd7e64d4
L		 3772 }
3773 else
3774 {
3775 resolved_plt = htab->plt_got;
3776 plt_offset = eh->plt_got.offset;
3777 }
3778
3779 relocation = (resolved_plt->output_section->vma
3780 + resolved_plt->output_offset
3781 + plt_offset);
b34976b6 3782 unresolved_reloc = FALSE;
252b5132
RH		 3783 break;
3784
1788fc08 3785 case R_386_SIZE32:
1788fc08
L		 3786 /* Set to symbol size. */
3787 relocation = st_size;
3788 /* Fall through. */
3789
252b5132
RH		 3790 case R_386_32:
3791 case R_386_PC32:
3348747a
NS		 3792 if ((input_section->flags & SEC_ALLOC) == 0
3793 || is_vxworks_tls)
ec338859
AM		 3794 break;
3795
aec6b87e
L		 3796 /* Copy dynamic function pointer relocations. Don't generate
3797 dynamic relocations against resolved undefined weak symbols
3798 in PIE, except for R_386_PC32. */
0e1862bb 3799 if ((bfd_link_pic (info)
ef5aade5 3800 && (h == NULL
aec6b87e
L		 3801 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3802 && (!resolved_to_zero
3803 || r_type == R_386_PC32))
3804 || h->root.type != bfd_link_hash_undefweak))
1788fc08 3805 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
f6c52c13 3806 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845 3807 || (ELIMINATE_COPY_RELOCS
0e1862bb 3808 && !bfd_link_pic (info)
12d0ee4a
AM		 3809 && h != NULL
3810 && h->dynindx != -1
aec6b87e
L		 3811 && (!h->non_got_ref
3812 || eh->func_pointer_refcount > 0
3813 || (h->root.type == bfd_link_hash_undefweak
3814 && !resolved_to_zero))
bae420ef
L		 3815 && ((h->def_dynamic && !h->def_regular)
3816 /* Undefined weak symbol is bound locally when
3817 PIC is false. */
3818 || h->root.type == bfd_link_hash_undefweak)))
252b5132 3819 {
947216bf 3820 Elf_Internal_Rela outrel;
b34976b6 3821 bfd_boolean skip, relocate;
0c715baa 3822 asection *sreloc;
252b5132
RH		 3823
3824 /* When generating a shared object, these relocations
3825 are copied into the output file to be resolved at run
3826 time. */
3827
b34976b6
AM		 3828 skip = FALSE;
3829 relocate = FALSE;
252b5132 3830
c629eae0
JJ		 3831 outrel.r_offset =
3832 _bfd_elf_section_offset (output_bfd, info, input_section,
3833 rel->r_offset);
3834 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 3835 skip = TRUE;
0bb2d96a 3836 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 3837 skip = TRUE, relocate = TRUE;
252b5132
RH		 3838 outrel.r_offset += (input_section->output_section->vma
3839 + input_section->output_offset);
3840
3841 if (skip)
0bb2d96a 3842 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 3843 else if (h != NULL
3844 && h->dynindx != -1
3845 && (r_type == R_386_PC32
4e0c91e4
L		 3846 || !(bfd_link_executable (info)
3847 || SYMBOLIC_BIND (info, h))
f5385ebf 3848 || !h->def_regular))
0bb2d96a 3849 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 3850 else
3851 {
5a15f56f 3852 /* This symbol is local, or marked to become local. */
b34976b6 3853 relocate = TRUE;
5a15f56f 3854 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 3855 }
3856
cbe950e9 3857 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 3858
62d78908
L		 3859 if (sreloc == NULL || sreloc->contents == NULL)
3860 {
3861 r = bfd_reloc_notsupported;
3862 goto check_relocation_error;
3863 }
0c715baa 3864
59d6ffb2 3865 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 3866
3867 /* If this reloc is against an external symbol, we do
3868 not want to fiddle with the addend. Otherwise, we
3869 need to include the symbol value so that it becomes
3870 an addend for the dynamic reloc. */
0f88be7a 3871 if (! relocate)
252b5132
RH		 3872 continue;
3873 }
252b5132
RH		 3874 break;
3875
37e55690 3876 case R_386_TLS_IE:
0e1862bb 3877 if (!bfd_link_executable (info))
37e55690 3878 {
947216bf 3879 Elf_Internal_Rela outrel;
37e55690 3880 asection *sreloc;
37e55690
JJ		 3881
3882 outrel.r_offset = rel->r_offset
3883 + input_section->output_section->vma
3884 + input_section->output_offset;
3885 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3886 sreloc = elf_section_data (input_section)->sreloc;
3887 if (sreloc == NULL)
3888 abort ();
59d6ffb2 3889 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 3890 }
3891 /* Fall through */
3892
13ae64f3 3893 case R_386_TLS_GD:
67a4f2b7
AO		 3894 case R_386_TLS_GOTDESC:
3895 case R_386_TLS_DESC_CALL:
13ae64f3 3896 case R_386_TLS_IE_32:
37e55690 3897 case R_386_TLS_GOTIE:
13ae64f3
JJ		 3898 tls_type = GOT_UNKNOWN;
3899 if (h == NULL && local_got_offsets)
0afcef53 3900 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
13ae64f3 3901 else if (h != NULL)
0afcef53 3902 tls_type = elf_x86_hash_entry(h)->tls_type;
37e55690
JJ		 3903 if (tls_type == GOT_TLS_IE)
3904 tls_type = GOT_TLS_IE_NEG;
142411ca
L		 3905
3906 if (! elf_i386_tls_transition (info, input_bfd,
3907 input_section, contents,
3908 symtab_hdr, sym_hashes,
3909 &r_type, tls_type, rel,
bedfd056 3910 relend, h, r_symndx, TRUE))
142411ca 3911 return FALSE;
13ae64f3
JJ		 3912
3913 if (r_type == R_386_TLS_LE_32)
3914 {
82e51918 3915 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 3916 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3917 {
142411ca 3918 unsigned int type;
13ae64f3
JJ		 3919 bfd_vma roff;
3920
3921 /* GD->LE transition. */
6eaa7fb5 3922 type = *(contents + rel->r_offset - 2);
13ae64f3
JJ		 3923 if (type == 0x04)
3924 {
6eaa7fb5
L		 3925 /* Change
3926 leal foo@tlsgd(,%ebx,1), %eax
3927 call ___tls_get_addr@PLT
3928 into:
3929 movl %gs:0, %eax
3930 subl $foo@tpoff, %eax
13ae64f3 3931 (6 byte form of subl). */
142411ca 3932 roff = rel->r_offset + 5;
13ae64f3
JJ		 3933 }
3934 else
3935 {
6eaa7fb5
L		 3936 /* Change
3937 leal foo@tlsgd(%ebx), %eax
3938 call ___tls_get_addr@PLT
3939 nop
3940 or
3941 leal foo@tlsgd(%reg), %eax
3942 call *___tls_get_addr@GOT(%reg)
3943 which may be converted to
3944 addr32 call ___tls_get_addr
3945 into:
3946 movl %gs:0, %eax; subl $foo@tpoff, %eax
142411ca 3947 (6 byte form of subl). */
142411ca 3948 roff = rel->r_offset + 6;
13ae64f3 3949 }
6eaa7fb5
L		 3950 memcpy (contents + roff - 8,
3951 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
eb4ff4d6 3952 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 3953 contents + roff);
6eaa7fb5 3954 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
13ae64f3 3955 rel++;
60f2e42e 3956 wrel++;
13ae64f3
JJ		 3957 continue;
3958 }
67a4f2b7
AO		 3959 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3960 {
3961 /* GDesc -> LE transition.
3962 It's originally something like:
3963 leal x@tlsdesc(%ebx), %eax
3964
3965 leal x@ntpoff, %eax
3966
3967 Registers other than %eax may be set up here. */
3968
142411ca 3969 unsigned int val;
67a4f2b7
AO		 3970 bfd_vma roff;
3971
67a4f2b7 3972 roff = rel->r_offset;
67a4f2b7 3973 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 3974
3975 /* Now modify the instruction as appropriate. */
3976 /* aoliva FIXME: remove the above and xor the byte
3977 below with 0x86. */
3978 bfd_put_8 (output_bfd, val ^ 0x86,
3979 contents + roff - 1);
eb4ff4d6 3980 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 3981 contents + roff);
3982 continue;
3983 }
3984 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3985 {
3986 /* GDesc -> LE transition.
3987 It's originally:
3988 call *(%eax)
3989 Turn it into:
142411ca 3990 xchg %ax,%ax */
67a4f2b7 3991
67a4f2b7 3992 bfd_vma roff;
6bbec505 3993
67a4f2b7 3994 roff = rel->r_offset;
10efb593 3995 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3996 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3997 continue;
3998 }
37e55690 3999 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3 4000 {
142411ca 4001 unsigned int val;
13ae64f3
JJ		 4002
4003 /* IE->LE transition:
37e55690
JJ		 4004 Originally it can be one of:
4005 movl foo, %eax
4006 movl foo, %reg
4007 addl foo, %reg
4008 We change it into:
4009 movl $foo, %eax
4010 movl $foo, %reg
4011 addl $foo, %reg. */
37e55690 4012 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 4013 if (val == 0xa1)
4014 {
4015 /* movl foo, %eax. */
55fd94b0
AM		 4016 bfd_put_8 (output_bfd, 0xb8,
4017 contents + rel->r_offset - 1);
37e55690 4018 }
299bf759 4019 else
37e55690 4020 {
142411ca
L		 4021 unsigned int type;
4022
55fd94b0
AM		 4023 type = bfd_get_8 (input_bfd,
4024 contents + rel->r_offset - 2);
299bf759 4025 switch (type)
26e41594 4026 {
299bf759
L		 4027 case 0x8b:
4028 /* movl */
299bf759
L		 4029 bfd_put_8 (output_bfd, 0xc7,
4030 contents + rel->r_offset - 2);
4031 bfd_put_8 (output_bfd,
4032 0xc0 | ((val >> 3) & 7),
4033 contents + rel->r_offset - 1);
4034 break;
4035 case 0x03:
4036 /* addl */
299bf759
L		 4037 bfd_put_8 (output_bfd, 0x81,
4038 contents + rel->r_offset - 2);
4039 bfd_put_8 (output_bfd,
4040 0xc0 | ((val >> 3) & 7),
4041 contents + rel->r_offset - 1);
4042 break;
4043 default:
4044 BFD_FAIL ();
4045 break;
26e41594 4046 }
37e55690 4047 }
eb4ff4d6 4048 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4049 contents + rel->r_offset);
4050 continue;
4051 }
4052 else
4053 {
4054 unsigned int val, type;
4055
4056 /* {IE_32,GOTIE}->LE transition:
4057 Originally it can be one of:
13ae64f3 4058 subl foo(%reg1), %reg2
13ae64f3 4059 movl foo(%reg1), %reg2
37e55690 4060 addl foo(%reg1), %reg2
13ae64f3
JJ		 4061 We change it into:
4062 subl $foo, %reg2
37e55690
JJ		 4063 movl $foo, %reg2 (6 byte form)
4064 addl $foo, %reg2. */
13ae64f3
JJ		 4065 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4066 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 4067 if (type == 0x8b)
4068 {
4069 /* movl */
13ae64f3
JJ		 4070 bfd_put_8 (output_bfd, 0xc7,
4071 contents + rel->r_offset - 2);
4072 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4073 contents + rel->r_offset - 1);
4074 }
4075 else if (type == 0x2b)
4076 {
4077 /* subl */
13ae64f3
JJ		 4078 bfd_put_8 (output_bfd, 0x81,
4079 contents + rel->r_offset - 2);
4080 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4081 contents + rel->r_offset - 1);
4082 }
37e55690
JJ		 4083 else if (type == 0x03)
4084 {
4085 /* addl */
4086 bfd_put_8 (output_bfd, 0x81,
4087 contents + rel->r_offset - 2);
4088 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4089 contents + rel->r_offset - 1);
4090 }
13ae64f3
JJ		 4091 else
4092 BFD_FAIL ();
37e55690 4093 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
eb4ff4d6 4094 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4095 contents + rel->r_offset);
4096 else
eb4ff4d6 4097 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 4098 contents + rel->r_offset);
13ae64f3
JJ		 4099 continue;
4100 }
4101 }
4102
6de2ae4a 4103 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4104 abort ();
4105
4106 if (h != NULL)
67a4f2b7
AO		 4107 {
4108 off = h->got.offset;
0afcef53 4109 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
67a4f2b7 4110 }
13ae64f3
JJ		 4111 else
4112 {
4113 if (local_got_offsets == NULL)
4114 abort ();
4115
4116 off = local_got_offsets[r_symndx];
67a4f2b7 4117 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 4118 }
4119
4120 if ((off & 1) != 0)
4121 off &= ~1;
26e41594 4122 else
13ae64f3 4123 {
947216bf 4124 Elf_Internal_Rela outrel;
91d6fa6a 4125 int dr_type;
67a4f2b7 4126 asection *sreloc;
13ae64f3 4127
6de2ae4a 4128 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4129 abort ();
4130
67a4f2b7
AO		 4131 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4132
4133 if (GOT_TLS_GDESC_P (tls_type))
4134 {
59d6ffb2 4135 bfd_byte *loc;
67a4f2b7
AO		 4136 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4137 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 4138 <= htab->elf.sgotplt->size);
4139 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4140 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4141 + offplt
4142 + htab->sgotplt_jump_table_size);
6de2ae4a 4143 sreloc = htab->elf.srelplt;
67a4f2b7 4144 loc = sreloc->contents;
765e526c 4145 loc += (htab->next_tls_desc_index++
5ae0bfb6 4146 * sizeof (Elf32_External_Rel));
67a4f2b7 4147 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 4148 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 4149 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4150 if (indx == 0)
4151 {
4152 BFD_ASSERT (! unresolved_reloc);
4153 bfd_put_32 (output_bfd,
0afcef53 4154 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 4155 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4156 + htab->sgotplt_jump_table_size + 4);
4157 }
4158 else
4159 {
4160 bfd_put_32 (output_bfd, 0,
6de2ae4a 4161 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4162 + htab->sgotplt_jump_table_size + 4);
4163 }
4164 }
4165
6de2ae4a 4166 sreloc = htab->elf.srelgot;
67a4f2b7 4167
6de2ae4a
L		 4168 outrel.r_offset = (htab->elf.sgot->output_section->vma
4169 + htab->elf.sgot->output_offset + off);
13ae64f3 4170
67a4f2b7 4171 if (GOT_TLS_GD_P (tls_type))
13ae64f3 4172 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 4173 else if (GOT_TLS_GDESC_P (tls_type))
4174 goto dr_done;
37e55690
JJ		 4175 else if (tls_type == GOT_TLS_IE_POS)
4176 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 4177 else
4178 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 4179
37e55690 4180 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6 4181 bfd_put_32 (output_bfd,
0afcef53 4182 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 4183 htab->elf.sgot->contents + off);
37e55690 4184 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 4185 bfd_put_32 (output_bfd,
0afcef53 4186 _bfd_x86_elf_dtpoff_base (info) - relocation,
6de2ae4a 4187 htab->elf.sgot->contents + off);
67a4f2b7 4188 else if (dr_type != R_386_TLS_DESC)
c366c25e 4189 bfd_put_32 (output_bfd, 0,
6de2ae4a 4190 htab->elf.sgot->contents + off);
13ae64f3 4191 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 4192
59d6ffb2 4193 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 4194
67a4f2b7 4195 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 4196 {
4197 if (indx == 0)
4198 {
82e51918 4199 BFD_ASSERT (! unresolved_reloc);
13ae64f3 4200 bfd_put_32 (output_bfd,
0afcef53 4201 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 4202 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4203 }
4204 else
4205 {
4206 bfd_put_32 (output_bfd, 0,
6de2ae4a 4207 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4208 outrel.r_info = ELF32_R_INFO (indx,
4209 R_386_TLS_DTPOFF32);
4210 outrel.r_offset += 4;
59d6ffb2 4211 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 4212 }
4213 }
37e55690
JJ		 4214 else if (tls_type == GOT_TLS_IE_BOTH)
4215 {
4216 bfd_put_32 (output_bfd,
eb4ff4d6 4217 (indx == 0
0afcef53 4218 ? relocation - _bfd_x86_elf_dtpoff_base (info)
eb4ff4d6 4219 : 0),
6de2ae4a 4220 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 4221 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4222 outrel.r_offset += 4;
59d6ffb2 4223 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 4224 }
13ae64f3 4225
67a4f2b7 4226 dr_done:
13ae64f3
JJ		 4227 if (h != NULL)
4228 h->got.offset |= 1;
4229 else
4230 local_got_offsets[r_symndx] |= 1;
4231 }
4232
67a4f2b7
AO		 4233 if (off >= (bfd_vma) -2
4234 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 4235 abort ();
67a4f2b7
AO		 4236 if (r_type == R_386_TLS_GOTDESC
4237 || r_type == R_386_TLS_DESC_CALL)
4238 {
4239 relocation = htab->sgotplt_jump_table_size + offplt;
4240 unresolved_reloc = FALSE;
4241 }
4242 else if (r_type == ELF32_R_TYPE (rel->r_info))
13ae64f3 4243 {
6de2ae4a
L		 4244 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4245 + htab->elf.sgotplt->output_offset;
4246 relocation = htab->elf.sgot->output_section->vma
4247 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 4248 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4249 && tls_type == GOT_TLS_IE_BOTH)
4250 relocation += 4;
4251 if (r_type == R_386_TLS_IE)
8c37241b 4252 relocation += g_o_t;
b34976b6 4253 unresolved_reloc = FALSE;
13ae64f3 4254 }
67a4f2b7 4255 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
13ae64f3
JJ		 4256 {
4257 unsigned int val, type;
4258 bfd_vma roff;
4259
4260 /* GD->IE transition. */
6eaa7fb5
L		 4261 type = *(contents + rel->r_offset - 2);
4262 val = *(contents + rel->r_offset - 1);
13ae64f3
JJ		 4263 if (type == 0x04)
4264 {
6eaa7fb5
L		 4265 /* Change
4266 leal foo@tlsgd(,%ebx,1), %eax
4267 call ___tls_get_addr@PLT
4268 into:
4269 movl %gs:0, %eax
4270 subl $foo@gottpoff(%ebx), %eax. */
13ae64f3 4271 val >>= 3;
142411ca 4272 roff = rel->r_offset - 3;
13ae64f3
JJ		 4273 }
4274 else
4275 {
6eaa7fb5
L		 4276 /* Change
4277 leal foo@tlsgd(%ebx), %eax
4278 call ___tls_get_addr@PLT
4279 nop
4280 or
4281 leal foo@tlsgd(%reg), %eax
4282 call *___tls_get_addr@GOT(%reg)
4283 which may be converted to
4284 addr32 call ___tls_get_addr
4285 into:
4286 movl %gs:0, %eax;
4287 subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 4288 roff = rel->r_offset - 2;
4289 }
4290 memcpy (contents + roff,
4291 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4292 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 4293 /* If foo is used only with foo@gotntpoff(%reg) and
4294 foo@indntpoff, but not with foo@gottpoff(%reg), change
4295 subl $foo@gottpoff(%reg), %eax
4296 into:
4297 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 4298 if (tls_type == GOT_TLS_IE_POS)
4299 contents[roff + 6] = 0x03;
8c37241b 4300 bfd_put_32 (output_bfd,
6de2ae4a
L		 4301 htab->elf.sgot->output_section->vma
4302 + htab->elf.sgot->output_offset + off
4303 - htab->elf.sgotplt->output_section->vma
4304 - htab->elf.sgotplt->output_offset,
13ae64f3 4305 contents + roff + 8);
6eaa7fb5 4306 /* Skip R_386_PLT32 and R_386_GOT32X. */
13ae64f3 4307 rel++;
60f2e42e 4308 wrel++;
13ae64f3
JJ		 4309 continue;
4310 }
67a4f2b7
AO		 4311 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4312 {
4313 /* GDesc -> IE transition.
4314 It's originally something like:
4315 leal x@tlsdesc(%ebx), %eax
4316
4317 Change it to:
142411ca 4318 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 4319 or:
4320 movl x@gottpoff(%ebx), %eax # before negl %eax
4321
4322 Registers other than %eax may be set up here. */
4323
67a4f2b7
AO		 4324 bfd_vma roff;
4325
4326 /* First, make sure it's a leal adding ebx to a 32-bit
4327 offset into any register, although it's probably
4328 almost always going to be eax. */
4329 roff = rel->r_offset;
67a4f2b7
AO		 4330
4331 /* Now modify the instruction as appropriate. */
4332 /* To turn a leal into a movl in the form we use it, it
4333 suffices to change the first byte from 0x8d to 0x8b.
4334 aoliva FIXME: should we decide to keep the leal, all
4335 we have to do is remove the statement below, and
4336 adjust the relaxation of R_386_TLS_DESC_CALL. */
4337 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4338
4339 if (tls_type == GOT_TLS_IE_BOTH)
4340 off += 4;
4341
4342 bfd_put_32 (output_bfd,
6de2ae4a
L		 4343 htab->elf.sgot->output_section->vma
4344 + htab->elf.sgot->output_offset + off
4345 - htab->elf.sgotplt->output_section->vma
4346 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 4347 contents + roff);
4348 continue;
4349 }
4350 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4351 {
4352 /* GDesc -> IE transition.
4353 It's originally:
4354 call *(%eax)
4355
4356 Change it to:
142411ca 4357 xchg %ax,%ax
67a4f2b7
AO		 4358 or
4359 negl %eax
4360 depending on how we transformed the TLS_GOTDESC above.
4361 */
4362
67a4f2b7
AO		 4363 bfd_vma roff;
4364
67a4f2b7 4365 roff = rel->r_offset;
67a4f2b7
AO		 4366
4367 /* Now modify the instruction as appropriate. */
4368 if (tls_type != GOT_TLS_IE_NEG)
4369 {
10efb593
L		 4370 /* xchg %ax,%ax */
4371 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4372 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4373 }
4374 else
4375 {
4376 /* negl %eax */
4377 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4378 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4379 }
4380
4381 continue;
4382 }
4383 else
4384 BFD_ASSERT (FALSE);
13ae64f3
JJ		 4385 break;
4386
4387 case R_386_TLS_LDM:
142411ca
L		 4388 if (! elf_i386_tls_transition (info, input_bfd,
4389 input_section, contents,
4390 symtab_hdr, sym_hashes,
4391 &r_type, GOT_UNKNOWN, rel,
bedfd056 4392 relend, h, r_symndx, TRUE))
142411ca 4393 return FALSE;
13ae64f3 4394
142411ca
L		 4395 if (r_type != R_386_TLS_LDM)
4396 {
6eaa7fb5
L		 4397 /* LD->LE transition. Change
4398 leal foo@tlsldm(%ebx) %eax
4399 call ___tls_get_addr@PLT
4400 into:
4401 movl %gs:0, %eax
4402 nop
4403 leal 0(%esi,1), %esi
4404 or change
4405 leal foo@tlsldm(%reg) %eax
4406 call *___tls_get_addr@GOT(%reg)
4407 which may be converted to
4408 addr32 call ___tls_get_addr
4409 into:
4410 movl %gs:0, %eax
4411 leal 0(%esi), %esi */
142411ca 4412 BFD_ASSERT (r_type == R_386_TLS_LE_32);
6eaa7fb5
L		 4413 if (*(contents + rel->r_offset + 4) == 0xff
4414 || *(contents + rel->r_offset + 4) == 0x67)
4415 memcpy (contents + rel->r_offset - 2,
4416 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
4417 else
4418 memcpy (contents + rel->r_offset - 2,
4419 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 4420 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 4421 rel++;
60f2e42e 4422 wrel++;
13ae64f3
JJ		 4423 continue;
4424 }
4425
6de2ae4a 4426 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4427 abort ();
4428
0afcef53 4429 off = htab->tls_ld_or_ldm_got.offset;
13ae64f3
JJ		 4430 if (off & 1)
4431 off &= ~1;
4432 else
4433 {
947216bf 4434 Elf_Internal_Rela outrel;
13ae64f3 4435
6de2ae4a 4436 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4437 abort ();
4438
6de2ae4a
L		 4439 outrel.r_offset = (htab->elf.sgot->output_section->vma
4440 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 4441
4442 bfd_put_32 (output_bfd, 0,
6de2ae4a 4443 htab->elf.sgot->contents + off);
13ae64f3 4444 bfd_put_32 (output_bfd, 0,
6de2ae4a 4445 htab->elf.sgot->contents + off + 4);
13ae64f3 4446 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 4447 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
0afcef53 4448 htab->tls_ld_or_ldm_got.offset |= 1;
13ae64f3 4449 }
6de2ae4a
L		 4450 relocation = htab->elf.sgot->output_section->vma
4451 + htab->elf.sgot->output_offset + off
4452 - htab->elf.sgotplt->output_section->vma
4453 - htab->elf.sgotplt->output_offset;
b34976b6 4454 unresolved_reloc = FALSE;
13ae64f3
JJ		 4455 break;
4456
4457 case R_386_TLS_LDO_32:
0e1862bb
L		 4458 if (!bfd_link_executable (info)
4459 || (input_section->flags & SEC_CODE) == 0)
0afcef53 4460 relocation -= _bfd_x86_elf_dtpoff_base (info);
13ae64f3
JJ		 4461 else
4462 /* When converting LDO to LE, we must negate. */
eb4ff4d6 4463 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4464 break;
4465
4466 case R_386_TLS_LE_32:
13ae64f3 4467 case R_386_TLS_LE:
0e1862bb 4468 if (!bfd_link_executable (info))
37e55690 4469 {
947216bf 4470 Elf_Internal_Rela outrel;
37e55690 4471 asection *sreloc;
37e55690
JJ		 4472
4473 outrel.r_offset = rel->r_offset
4474 + input_section->output_section->vma
4475 + input_section->output_offset;
4476 if (h != NULL && h->dynindx != -1)
4477 indx = h->dynindx;
4478 else
4479 indx = 0;
4480 if (r_type == R_386_TLS_LE_32)
4481 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4482 else
4483 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4484 sreloc = elf_section_data (input_section)->sreloc;
4485 if (sreloc == NULL)
4486 abort ();
59d6ffb2 4487 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 4488 if (indx)
4489 continue;
4490 else if (r_type == R_386_TLS_LE_32)
0afcef53 4491 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
37e55690 4492 else
0afcef53 4493 relocation -= _bfd_x86_elf_dtpoff_base (info);
37e55690
JJ		 4494 }
4495 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 4496 relocation = elf_i386_tpoff (info, relocation);
37e55690 4497 else
eb4ff4d6 4498 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4499 break;
4500
252b5132
RH		 4501 default:
4502 break;
4503 }
4504
239e1f3a
AM		 4505 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4506 because such sections are not SEC_ALLOC and thus ld.so will
4507 not process them. */
8c694914 4508 if (unresolved_reloc
239e1f3a 4509 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4510 && h->def_dynamic)
4511 && _bfd_elf_section_offset (output_bfd, info, input_section,
4512 rel->r_offset) != (bfd_vma) -1)
6a30718d 4513 {
4eca0228 4514 _bfd_error_handler
695344c0 4515 /* xgettext:c-format */
d42c267e 4516 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 4517 input_bfd,
4518 input_section,
d42c267e 4519 rel->r_offset,
843fe662 4520 howto->name,
6a30718d 4521 h->root.root.string);
b34976b6 4522 return FALSE;
6a30718d 4523 }
83be169b 4524
cbe950e9 4525do_relocation:
252b5132
RH		 4526 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4527 contents, rel->r_offset,
55fd94b0 4528 relocation, 0);
252b5132 4529
62d78908 4530check_relocation_error:
cf5c0c5b 4531 if (r != bfd_reloc_ok)
252b5132 4532 {
cf5c0c5b 4533 const char *name;
ffb2e45b 4534
cf5c0c5b
AM		 4535 if (h != NULL)
4536 name = h->root.root.string;
4537 else
4538 {
4539 name = bfd_elf_string_from_elf_section (input_bfd,
4540 symtab_hdr->sh_link,
4541 sym->st_name);
4542 if (name == NULL)
b34976b6 4543 return FALSE;
cf5c0c5b
AM		 4544 if (*name == '\0')
4545 name = bfd_section_name (input_bfd, sec);
4546 }
ffb2e45b 4547
cf5c0c5b 4548 if (r == bfd_reloc_overflow)
1a72702b
AM		 4549 (*info->callbacks->reloc_overflow)
4550 (info, (h ? &h->root : NULL), name, howto->name,
4551 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
cf5c0c5b
AM		 4552 else
4553 {
4eca0228 4554 _bfd_error_handler
695344c0 4555 /* xgettext:c-format */
d42c267e 4556 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
d003868e 4557 input_bfd, input_section,
d42c267e 4558 rel->r_offset, name, (int) r);
b34976b6 4559 return FALSE;
cf5c0c5b 4560 }
252b5132 4561 }
60f2e42e
L		 4562
4563 if (wrel != rel)
4564 *wrel = *rel;
4565 }
4566
4567 if (wrel != rel)
4568 {
4569 Elf_Internal_Shdr *rel_hdr;
4570 size_t deleted = rel - wrel;
4571
4572 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4573 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4574 if (rel_hdr->sh_size == 0)
4575 {
4576 /* It is too late to remove an empty reloc section. Leave
4577 one NONE reloc.
4578 ??? What is wrong with an empty section??? */
4579 rel_hdr->sh_size = rel_hdr->sh_entsize;
4580 deleted -= 1;
4581 }
4582 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4583 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4584 input_section->reloc_count -= deleted;
252b5132
RH		 4585 }
4586
b34976b6 4587 return TRUE;
252b5132
RH		 4588}
4589
4590/* Finish up dynamic symbol handling. We set the contents of various
4591 dynamic sections here. */
4592
b34976b6 4593static bfd_boolean
55fd94b0
AM		 4594elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4595 struct bfd_link_info *info,
4596 struct elf_link_hash_entry *h,
4597 Elf_Internal_Sym *sym)
252b5132 4598{
0afcef53 4599 struct elf_x86_link_hash_table *htab;
25e762b9
RM		 4600 unsigned plt_entry_size;
4601 const struct elf_i386_backend_data *abed;
0afcef53 4602 struct elf_x86_link_hash_entry *eh;
aec6b87e 4603 bfd_boolean local_undefweak;
ee2fdd6f 4604 bfd_boolean use_plt_second;
252b5132 4605
0afcef53 4606 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 4607 if (htab == NULL)
4608 return FALSE;
252b5132 4609
25e762b9 4610 abed = get_elf_i386_backend_data (output_bfd);
765e526c 4611 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 4612
ee2fdd6f
L		 4613 /* Use the second PLT section only if there is .plt section. */
4614 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4615
0afcef53 4616 eh = (struct elf_x86_link_hash_entry *) h;
e133d005
L		 4617 if (eh->no_finish_dynamic_symbol)
4618 abort ();
dd7e64d4 4619
aec6b87e
L		 4620 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4621 resolved undefined weak symbols in executable so that their
4622 references have value 0 at run-time. */
0afcef53 4623 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, I386_ELF_DATA,
e62b9723
L		 4624 eh->has_got_reloc,
4625 eh);
aec6b87e 4626
252b5132
RH		 4627 if (h->plt.offset != (bfd_vma) -1)
4628 {
ee2fdd6f 4629 bfd_vma plt_index, plt_offset;
252b5132 4630 bfd_vma got_offset;
947216bf
AM		 4631 Elf_Internal_Rela rel;
4632 bfd_byte *loc;
ee2fdd6f 4633 asection *plt, *resolved_plt, *gotplt, *relplt;
cbe950e9
L		 4634
4635 /* When building a static executable, use .iplt, .igot.plt and
4636 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 4637 if (htab->elf.splt != NULL)
cbe950e9 4638 {
6de2ae4a
L		 4639 plt = htab->elf.splt;
4640 gotplt = htab->elf.sgotplt;
4641 relplt = htab->elf.srelplt;
cbe950e9
L		 4642 }
4643 else
4644 {
6de2ae4a
L		 4645 plt = htab->elf.iplt;
4646 gotplt = htab->elf.igotplt;
4647 relplt = htab->elf.irelplt;
cbe950e9 4648 }
252b5132
RH		 4649
4650 /* This symbol has an entry in the procedure linkage table. Set
4651 it up. */
4652
cbe950e9 4653 if ((h->dynindx == -1
aec6b87e 4654 && !local_undefweak
0e1862bb 4655 && !((h->forced_local || bfd_link_executable (info))
cbe950e9
L		 4656 && h->def_regular
4657 && h->type == STT_GNU_IFUNC))
4658 || plt == NULL
4659 || gotplt == NULL
4660 || relplt == NULL)
cec7f46a 4661 abort ();
252b5132
RH		 4662
4663 /* Get the index in the procedure linkage table which
4664 corresponds to this symbol. This is the index of this symbol
4665 in all the symbols for which we are making plt entries. The
cbe950e9 4666 first entry in the procedure linkage table is reserved.
252b5132 4667
cbe950e9 4668 Get the offset into the .got table of the entry that
252b5132 4669 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 4670 The first three are reserved.
6bbec505 4671
cbe950e9
L		 4672 For static executables, we don't reserve anything. */
4673
6de2ae4a 4674 if (plt == htab->elf.splt)
cbe950e9 4675 {
f604c2a2 4676 got_offset = (h->plt.offset / plt_entry_size
765e526c 4677 - htab->plt.has_plt0);
e1f98742 4678 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 4679 }
4680 else
4681 {
e1f98742
L		 4682 got_offset = h->plt.offset / plt_entry_size;
4683 got_offset = got_offset * 4;
cbe950e9 4684 }
252b5132 4685
f604c2a2
L		 4686 /* Fill in the entry in the procedure linkage table and update
4687 the first slot. */
765e526c 4688 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
f604c2a2 4689 plt_entry_size);
ee2fdd6f
L		 4690
4691 if (use_plt_second)
4692 {
4693 const bfd_byte *plt_entry;
4694 if (bfd_link_pic (info))
765e526c 4695 plt_entry = htab->non_lazy_plt->pic_plt_entry;
ee2fdd6f 4696 else
765e526c 4697 plt_entry = htab->non_lazy_plt->plt_entry;
ee2fdd6f 4698 memcpy (htab->plt_second->contents + eh->plt_second.offset,
765e526c 4699 plt_entry, htab->non_lazy_plt->plt_entry_size);
ee2fdd6f
L		 4700
4701 resolved_plt = htab->plt_second;
4702 plt_offset = eh->plt_second.offset;
4703 }
4704 else
4705 {
4706 resolved_plt = plt;
4707 plt_offset = h->plt.offset;
4708 }
4709
0e1862bb 4710 if (! bfd_link_pic (info))
252b5132 4711 {
252b5132 4712 bfd_put_32 (output_bfd,
cbe950e9
L		 4713 (gotplt->output_section->vma
4714 + gotplt->output_offset
252b5132 4715 + got_offset),
ee2fdd6f 4716 resolved_plt->contents + plt_offset
765e526c 4717 + htab->plt.plt_got_offset);
eac338cf 4718
f604c2a2 4719 if (abed->os == is_vxworks)
eac338cf
PB		 4720 {
4721 int s, k, reloc_index;
4722
4723 /* Create the R_386_32 relocation referencing the GOT
4724 for this PLT entry. */
4725
4726 /* S: Current slot number (zero-based). */
765e526c
L		 4727 s = ((h->plt.offset - htab->plt.plt_entry_size)
4728 / htab->plt.plt_entry_size);
eac338cf 4729 /* K: Number of relocations for PLTResolve. */
0e1862bb 4730 if (bfd_link_pic (info))
eac338cf
PB		 4731 k = PLTRESOLVE_RELOCS_SHLIB;
4732 else
4733 k = PLTRESOLVE_RELOCS;
4734 /* Skip the PLTresolve relocations, and the relocations for
4735 the other PLT slots. */
4736 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
765e526c 4737 loc = (htab->srelplt2->contents + reloc_index
eac338cf
PB		 4738 * sizeof (Elf32_External_Rel));
4739
ee2fdd6f
L		 4740 rel.r_offset = (plt->output_section->vma
4741 + plt->output_offset
eac338cf 4742 + h->plt.offset + 2),
7325306f 4743 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 4744 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4745
4746 /* Create the R_386_32 relocation referencing the beginning of
4747 the PLT for this GOT entry. */
6de2ae4a
L		 4748 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4749 + htab->elf.sgotplt->output_offset
eac338cf 4750 + got_offset);
7325306f 4751 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 4752 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 4753 loc + sizeof (Elf32_External_Rel));
eac338cf 4754 }
252b5132
RH		 4755 }
4756 else
4757 {
252b5132 4758 bfd_put_32 (output_bfd, got_offset,
ee2fdd6f 4759 resolved_plt->contents + plt_offset
765e526c 4760 + htab->plt.plt_got_offset);
252b5132
RH		 4761 }
4762
aec6b87e
L		 4763 /* Fill in the entry in the global offset table. Leave the entry
4764 as zero for undefined weak symbol in PIE. No PLT relocation
4765 against undefined weak symbol in PIE. */
4766 if (!local_undefweak)
cbe950e9 4767 {
765e526c 4768 if (htab->plt.has_plt0)
f604c2a2
L		 4769 bfd_put_32 (output_bfd,
4770 (plt->output_section->vma
4771 + plt->output_offset
4772 + h->plt.offset
765e526c 4773 + htab->lazy_plt->plt_lazy_offset),
f604c2a2 4774 gotplt->contents + got_offset);
252b5132 4775
aec6b87e
L		 4776 /* Fill in the entry in the .rel.plt section. */
4777 rel.r_offset = (gotplt->output_section->vma
4778 + gotplt->output_offset
4779 + got_offset);
4780 if (h->dynindx == -1
4781 || ((bfd_link_executable (info)
4782 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4783 && h->def_regular
4784 && h->type == STT_GNU_IFUNC))
4785 {
6322e5c5
L		 4786 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4787 h->root.root.string,
4788 h->root.u.def.section->owner);
4789
aec6b87e
L		 4790 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4791 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4792 in the .got.plt section. */
4793 bfd_put_32 (output_bfd,
4794 (h->root.u.def.value
4795 + h->root.u.def.section->output_section->vma
4796 + h->root.u.def.section->output_offset),
4797 gotplt->contents + got_offset);
4798 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4799 /* R_386_IRELATIVE comes last. */
4800 plt_index = htab->next_irelative_index--;
4801 }
4802 else
4803 {
4804 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4805 plt_index = htab->next_jump_slot_index++;
4806 }
4807
4808 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4809 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4810
f604c2a2
L		 4811 /* Don't fill the second and third slots in PLT entry for
4812 static executables nor without PLT0. */
765e526c 4813 if (plt == htab->elf.splt && htab->plt.has_plt0)
aec6b87e
L		 4814 {
4815 bfd_put_32 (output_bfd,
4816 plt_index * sizeof (Elf32_External_Rel),
4817 plt->contents + h->plt.offset
765e526c 4818 + htab->lazy_plt->plt_reloc_offset);
f604c2a2
L		 4819 bfd_put_32 (output_bfd,
4820 - (h->plt.offset
765e526c 4821 + htab->lazy_plt->plt_plt_offset + 4),
f604c2a2 4822 (plt->contents + h->plt.offset
765e526c 4823 + htab->lazy_plt->plt_plt_offset));
aec6b87e 4824 }
e1f98742 4825 }
dd7e64d4
L		 4826 }
4827 else if (eh->plt_got.offset != (bfd_vma) -1)
4828 {
4829 bfd_vma got_offset, plt_offset;
4830 asection *plt, *got, *gotplt;
4831 const bfd_byte *got_plt_entry;
4832
dd7e64d4
L		 4833 /* Set the entry in the GOT procedure linkage table. */
4834 plt = htab->plt_got;
4835 got = htab->elf.sgot;
4836 gotplt = htab->elf.sgotplt;
4837 got_offset = h->got.offset;
4838
4839 if (got_offset == (bfd_vma) -1
4840 || plt == NULL
4841 || got == NULL
4842 || gotplt == NULL)
4843 abort ();
4844
4845 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 4846 if (! bfd_link_pic (info))
252b5132 4847 {
765e526c 4848 got_plt_entry = htab->non_lazy_plt->plt_entry;
dd7e64d4 4849 got_offset += got->output_section->vma + got->output_offset;
252b5132 4850 }
dd7e64d4
L		 4851 else
4852 {
765e526c 4853 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
dd7e64d4
L		 4854 got_offset += (got->output_section->vma
4855 + got->output_offset
4856 - gotplt->output_section->vma
4857 - gotplt->output_offset);
4858 }
4859
4860 plt_offset = eh->plt_got.offset;
4861 memcpy (plt->contents + plt_offset, got_plt_entry,
765e526c 4862 htab->non_lazy_plt->plt_entry_size);
dd7e64d4 4863 bfd_put_32 (output_bfd, got_offset,
f604c2a2 4864 (plt->contents + plt_offset
765e526c 4865 + htab->non_lazy_plt->plt_got_offset));
dd7e64d4
L		 4866 }
4867
aec6b87e
L		 4868 if (!local_undefweak
4869 && !h->def_regular
dd7e64d4
L		 4870 && (h->plt.offset != (bfd_vma) -1
4871 || eh->plt_got.offset != (bfd_vma) -1))
4872 {
4873 /* Mark the symbol as undefined, rather than as defined in
4874 the .plt section. Leave the value if there were any
4875 relocations where pointer equality matters (this is a clue
4876 for the dynamic linker, to make function pointer
4877 comparisons work between an application and shared
4878 library), otherwise set it to zero. If a function is only
4879 called from a binary, there is no need to slow down
4880 shared libraries because of that. */
4881 sym->st_shndx = SHN_UNDEF;
4882 if (!h->pointer_equality_needed)
4883 sym->st_value = 0;
252b5132
RH		 4884 }
4885
aec6b87e
L		 4886 /* Don't generate dynamic GOT relocation against undefined weak
4887 symbol in executable. */
13ae64f3 4888 if (h->got.offset != (bfd_vma) -1
0afcef53
L		 4889 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
4890 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
aec6b87e 4891 && !local_undefweak)
252b5132 4892 {
947216bf 4893 Elf_Internal_Rela rel;
233cc9c1 4894 asection *relgot = htab->elf.srelgot;
252b5132
RH		 4895
4896 /* This symbol has an entry in the global offset table. Set it
4897 up. */
4898
6de2ae4a 4899 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 4900 abort ();
252b5132 4901
6de2ae4a
L		 4902 rel.r_offset = (htab->elf.sgot->output_section->vma
4903 + htab->elf.sgot->output_offset
dc810e39 4904 + (h->got.offset & ~(bfd_vma) 1));
252b5132 4905
dd5724d5
AM		 4906 /* If this is a static link, or it is a -Bsymbolic link and the
4907 symbol is defined locally or was forced to be local because
4908 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 4909 The entry in the global offset table will already have been
4910 initialized in the relocate_section function. */
710ab287 4911 if (h->def_regular
0018b0a3
L		 4912 && h->type == STT_GNU_IFUNC)
4913 {
233cc9c1
L		 4914 if (h->plt.offset == (bfd_vma) -1)
4915 {
4916 /* STT_GNU_IFUNC is referenced without PLT. */
4917 if (htab->elf.splt == NULL)
4918 {
4919 /* use .rel[a].iplt section to store .got relocations
4920 in static executable. */
4921 relgot = htab->elf.irelplt;
4922 }
4923 if (SYMBOL_REFERENCES_LOCAL (info, h))
4924 {
6322e5c5
L		 4925 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4926 h->root.root.string,
4927 h->root.u.def.section->owner);
4928
233cc9c1
L		 4929 bfd_put_32 (output_bfd,
4930 (h->root.u.def.value
4931 + h->root.u.def.section->output_section->vma
4932 + h->root.u.def.section->output_offset),
4933 htab->elf.sgot->contents + h->got.offset);
4934 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4935 }
4936 else
4937 goto do_glob_dat;
4938 }
4939 else if (bfd_link_pic (info))
710ab287
L		 4940 {
4941 /* Generate R_386_GLOB_DAT. */
4942 goto do_glob_dat;
4943 }
4944 else
4945 {
cd2b2c10 4946 asection *plt;
ee2fdd6f 4947 bfd_vma plt_offset;
cd2b2c10 4948
710ab287
L		 4949 if (!h->pointer_equality_needed)
4950 abort ();
4951
4952 /* For non-shared object, we can't use .got.plt, which
4953 contains the real function addres if we need pointer
4954 equality. We load the GOT entry with the PLT entry. */
ee2fdd6f
L		 4955 if (htab->plt_second != NULL)
4956 {
4957 plt = htab->plt_second;
4958 plt_offset = eh->plt_second.offset;
4959 }
4960 else
4961 {
4962 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4963 plt_offset = h->plt.offset;
4964 }
710ab287
L		 4965 bfd_put_32 (output_bfd,
4966 (plt->output_section->vma
ee2fdd6f 4967 + plt->output_offset + plt_offset),
6de2ae4a 4968 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 4969 return TRUE;
4970 }
0018b0a3 4971 }
0e1862bb 4972 else if (bfd_link_pic (info)
0018b0a3 4973 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 4974 {
6725bdbf 4975 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 4976 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4977 }
252b5132
RH		 4978 else
4979 {
dd5724d5 4980 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 4981do_glob_dat:
6725bdbf 4982 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 4983 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 4984 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4985 }
4986
233cc9c1 4987 elf_append_rel (output_bfd, relgot, &rel);
252b5132
RH		 4988 }
4989
f5385ebf 4990 if (h->needs_copy)
252b5132 4991 {
947216bf 4992 Elf_Internal_Rela rel;
5474d94f 4993 asection *s;
252b5132
RH		 4994
4995 /* This symbol needs a copy reloc. Set it up. */
4996
ffb2e45b
AM		 4997 if (h->dynindx == -1
4998 || (h->root.type != bfd_link_hash_defined
4999 && h->root.type != bfd_link_hash_defweak)
5474d94f
AM		 5000 || htab->elf.srelbss == NULL
5001 || htab->elf.sreldynrelro == NULL)
ffb2e45b 5002 abort ();
252b5132
RH		 5003
5004 rel.r_offset = (h->root.u.def.value
5005 + h->root.u.def.section->output_section->vma
5006 + h->root.u.def.section->output_offset);
5007 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
afbf7e8e 5008 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 5009 s = htab->elf.sreldynrelro;
5010 else
5011 s = htab->elf.srelbss;
5012 elf_append_rel (output_bfd, s, &rel);
252b5132
RH		 5013 }
5014
b34976b6 5015 return TRUE;
252b5132
RH		 5016}
5017
c25bc9fc
L		 5018/* Finish up local dynamic symbol handling. We set the contents of
5019 various dynamic sections here. */
5020
5021static bfd_boolean
5022elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5023{
5024 struct elf_link_hash_entry *h
5025 = (struct elf_link_hash_entry *) *slot;
5026 struct bfd_link_info *info
23209a78 5027 = (struct bfd_link_info *) inf;
c25bc9fc
L		 5028
5029 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5030 h, NULL);
5031}
5032
aec6b87e
L		 5033/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5034 here since undefined weak symbol may not be dynamic and may not be
5035 called for elf_i386_finish_dynamic_symbol. */
5036
5037static bfd_boolean
5038elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5039 void *inf)
5040{
5041 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5042 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5043
5044 if (h->root.type != bfd_link_hash_undefweak
5045 || h->dynindx != -1)
5046 return TRUE;
5047
5048 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5f0f0847 5049 info, h, NULL);
aec6b87e
L		 5050}
5051
38701953
AM		 5052/* Used to decide how to sort relocs in an optimal manner for the
5053 dynamic linker, before writing them out. */
5054
5055static enum elf_reloc_type_class
cae1fbbb 5056elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 5057 const asection *rel_sec ATTRIBUTE_UNUSED,
5058 const Elf_Internal_Rela *rela)
38701953 5059{
cae1fbbb
L		 5060 bfd *abfd = info->output_bfd;
5061 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5062 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 5063
d9e3b590
L		 5064 if (htab->dynsym != NULL
5065 && htab->dynsym->contents != NULL)
5066 {
5067 /* Check relocation against STT_GNU_IFUNC symbol if there are
5068 dynamic symbols. */
5069 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
c428ce9d
L		 5070 if (r_symndx != STN_UNDEF)
5071 {
5072 Elf_Internal_Sym sym;
5073 if (!bed->s->swap_symbol_in (abfd,
5074 (htab->dynsym->contents
5075 + r_symndx * sizeof (Elf32_External_Sym)),
5076 0, &sym))
5077 abort ();
d9e3b590 5078
c428ce9d
L		 5079 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5080 return reloc_class_ifunc;
5081 }
d9e3b590 5082 }
cae1fbbb 5083
55fd94b0 5084 switch (ELF32_R_TYPE (rela->r_info))
38701953 5085 {
c428ce9d
L		 5086 case R_386_IRELATIVE:
5087 return reloc_class_ifunc;
38701953
AM		 5088 case R_386_RELATIVE:
5089 return reloc_class_relative;
5090 case R_386_JUMP_SLOT:
5091 return reloc_class_plt;
5092 case R_386_COPY:
5093 return reloc_class_copy;
5094 default:
5095 return reloc_class_normal;
5096 }
5097}
5098
252b5132
RH		 5099/* Finish up the dynamic sections. */
5100
b34976b6 5101static bfd_boolean
55fd94b0
AM		 5102elf_i386_finish_dynamic_sections (bfd *output_bfd,
5103 struct bfd_link_info *info)
252b5132 5104{
0afcef53 5105 struct elf_x86_link_hash_table *htab;
252b5132 5106 bfd *dynobj;
252b5132 5107 asection *sdyn;
25e762b9 5108 const struct elf_i386_backend_data *abed;
252b5132 5109
0afcef53 5110 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 5111 if (htab == NULL)
5112 return FALSE;
5113
ebe50bae 5114 dynobj = htab->elf.dynobj;
3d4d4302 5115 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
25e762b9 5116 abed = get_elf_i386_backend_data (output_bfd);
252b5132 5117
ebe50bae 5118 if (htab->elf.dynamic_sections_created)
252b5132 5119 {
252b5132
RH		 5120 Elf32_External_Dyn *dyncon, *dynconend;
5121
6de2ae4a 5122 if (sdyn == NULL || htab->elf.sgot == NULL)
ffb2e45b 5123 abort ();
252b5132
RH		 5124
5125 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 5126 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 5127 for (; dyncon < dynconend; dyncon++)
5128 {
5129 Elf_Internal_Dyn dyn;
51b64d56 5130 asection *s;
252b5132
RH		 5131
5132 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5133
5134 switch (dyn.d_tag)
5135 {
5136 default:
f604c2a2 5137 if (abed->os == is_vxworks
25e762b9 5138 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7a2b07ff 5139 break;
0ac8d2ca 5140 continue;
252b5132
RH		 5141
5142 case DT_PLTGOT:
6de2ae4a 5143 s = htab->elf.sgotplt;
8c37241b 5144 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 5145 break;
5146
252b5132 5147 case DT_JMPREL:
6de2ae4a 5148 s = htab->elf.srelplt;
6348e046 5149 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 5150 break;
5151
5152 case DT_PLTRELSZ:
6de2ae4a 5153 s = htab->elf.srelplt;
eea6121a 5154 dyn.d_un.d_val = s->size;
252b5132 5155 break;
252b5132 5156 }
0ac8d2ca
AM		 5157
5158 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 5159 }
5160
6de2ae4a 5161 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 5162 {
1f78f649
L		 5163 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5164 really seem like the right value. */
5165 elf_section_data (htab->elf.splt->output_section)
5166 ->this_hdr.sh_entsize = 4;
5167
765e526c 5168 if (htab->plt.has_plt0)
252b5132 5169 {
f604c2a2
L		 5170 /* Fill in the special first entry in the procedure linkage
5171 table. */
765e526c
L		 5172 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
5173 htab->lazy_plt->plt0_entry_size);
5174 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
25e762b9 5175 abed->plt0_pad_byte,
765e526c 5176 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
f604c2a2 5177 if (!bfd_link_pic (info))
eac338cf 5178 {
f604c2a2
L		 5179 bfd_put_32 (output_bfd,
5180 (htab->elf.sgotplt->output_section->vma
5181 + htab->elf.sgotplt->output_offset
5182 + 4),
5183 htab->elf.splt->contents
765e526c 5184 + htab->lazy_plt->plt0_got1_offset);
f604c2a2
L		 5185 bfd_put_32 (output_bfd,
5186 (htab->elf.sgotplt->output_section->vma
5187 + htab->elf.sgotplt->output_offset
5188 + 8),
5189 htab->elf.splt->contents
765e526c 5190 + htab->lazy_plt->plt0_got2_offset);
eac338cf 5191
f604c2a2 5192 if (abed->os == is_vxworks)
1f78f649 5193 {
f604c2a2
L		 5194 Elf_Internal_Rela rel;
5195 int num_plts = (htab->elf.splt->size
765e526c 5196 / htab->plt.plt_entry_size) - 1;
f604c2a2 5197 unsigned char *p;
765e526c 5198 asection *srelplt2 = htab->srelplt2;
f604c2a2
L		 5199
5200 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5201 + 4. On IA32 we use REL relocations so the
5202 addend goes in the PLT directly. */
5203 rel.r_offset = (htab->elf.splt->output_section->vma
5204 + htab->elf.splt->output_offset
765e526c 5205 + htab->lazy_plt->plt0_got1_offset);
1f78f649
L		 5206 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5207 R_386_32);
f604c2a2 5208 bfd_elf32_swap_reloc_out (output_bfd, &rel,
0afcef53 5209 srelplt2->contents);
f604c2a2
L		 5210 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5211 + 8. */
5212 rel.r_offset = (htab->elf.splt->output_section->vma
5213 + htab->elf.splt->output_offset
765e526c 5214 + htab->lazy_plt->plt0_got2_offset);
f604c2a2 5215 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
1f78f649 5216 R_386_32);
f604c2a2 5217 bfd_elf32_swap_reloc_out (output_bfd, &rel,
0afcef53 5218 srelplt2->contents +
f604c2a2
L		 5219 sizeof (Elf32_External_Rel));
5220 /* Correct the .rel.plt.unloaded relocations. */
0afcef53 5221 p = srelplt2->contents;
f604c2a2
L		 5222 if (bfd_link_pic (info))
5223 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5224 else
5225 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5226
5227 for (; num_plts; num_plts--)
5228 {
5229 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5230 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5231 R_386_32);
5232 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5233 p += sizeof (Elf32_External_Rel);
5234
5235 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5236 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
5237 R_386_32);
5238 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5239 p += sizeof (Elf32_External_Rel);
5240 }
1f78f649 5241 }
eac338cf
PB		 5242 }
5243 }
252b5132 5244 }
f604c2a2
L		 5245
5246 if (htab->plt_got != NULL && htab->plt_got->size > 0)
5247 elf_section_data (htab->plt_got->output_section)
765e526c 5248 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
ee2fdd6f
L		 5249
5250 if (htab->plt_second != NULL && htab->plt_second->size > 0)
5251 elf_section_data (htab->plt_second->output_section)
765e526c 5252 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
252b5132
RH		 5253 }
5254
f604c2a2
L		 5255 /* Fill in the first three entries in the global offset table. */
5256 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
252b5132 5257 {
56d4289c
L		 5258 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5259 {
4eca0228 5260 _bfd_error_handler
56d4289c
L		 5261 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5262 return FALSE;
5263 }
5264
f604c2a2
L		 5265 bfd_put_32 (output_bfd,
5266 (sdyn == NULL ? 0
5267 : sdyn->output_section->vma + sdyn->output_offset),
5268 htab->elf.sgotplt->contents);
5269 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5270 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
252b5132 5271
6de2ae4a 5272 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
12d0ee4a 5273 }
8c37241b 5274
e41b3a13 5275 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 5276 if (htab->plt_eh_frame != NULL
5277 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 5278 {
5279 if (htab->elf.splt != NULL
5280 && htab->elf.splt->size != 0
5281 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5282 && htab->elf.splt->output_section != NULL
5283 && htab->plt_eh_frame->output_section != NULL)
5284 {
5285 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5286 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5287 + htab->plt_eh_frame->output_offset
5288 + PLT_FDE_START_OFFSET;
5289 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5290 htab->plt_eh_frame->contents
5291 + PLT_FDE_START_OFFSET);
5292 }
5293 if (htab->plt_eh_frame->sec_info_type
dbaa2011 5294 == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 5295 {
5296 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5297 htab->plt_eh_frame,
5298 htab->plt_eh_frame->contents))
5299 return FALSE;
5300 }
5301 }
5302
fff53dae
L		 5303 /* Adjust .eh_frame for .plt.got section. */
5304 if (htab->plt_got_eh_frame != NULL
5305 && htab->plt_got_eh_frame->contents != NULL)
5306 {
5307 if (htab->plt_got != NULL
5308 && htab->plt_got->size != 0
5309 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5310 && htab->plt_got->output_section != NULL
5311 && htab->plt_got_eh_frame->output_section != NULL)
5312 {
5313 bfd_vma plt_start = htab->plt_got->output_section->vma;
5314 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5315 + htab->plt_got_eh_frame->output_offset
5316 + PLT_FDE_START_OFFSET;
5317 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5318 htab->plt_got_eh_frame->contents
5319 + PLT_FDE_START_OFFSET);
5320 }
5321 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5322 {
5323 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5324 htab->plt_got_eh_frame,
5325 htab->plt_got_eh_frame->contents))
5326 return FALSE;
5327 }
5328 }
5329
ee2fdd6f
L		 5330 /* Adjust .eh_frame for the second PLT section. */
5331 if (htab->plt_second_eh_frame != NULL
5332 && htab->plt_second_eh_frame->contents != NULL)
5333 {
5334 if (htab->plt_second != NULL
5335 && htab->plt_second->size != 0
5336 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
5337 && htab->plt_second->output_section != NULL
5338 && htab->plt_second_eh_frame->output_section != NULL)
5339 {
5340 bfd_vma plt_start = htab->plt_second->output_section->vma;
5341 bfd_vma eh_frame_start
5342 = (htab->plt_second_eh_frame->output_section->vma
5343 + htab->plt_second_eh_frame->output_offset
5344 + PLT_FDE_START_OFFSET);
5345 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5346 htab->plt_second_eh_frame->contents
5347 + PLT_FDE_START_OFFSET);
5348 }
5349 if (htab->plt_second_eh_frame->sec_info_type
5350 == SEC_INFO_TYPE_EH_FRAME)
5351 {
5352 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5353 htab->plt_second_eh_frame,
5354 htab->plt_second_eh_frame->contents))
5355 return FALSE;
5356 }
5357 }
5358
6de2ae4a
L		 5359 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5360 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
8c37241b 5361
aec6b87e
L		 5362 /* Fill PLT entries for undefined weak symbols in PIE. */
5363 if (bfd_link_pie (info))
5364 bfd_hash_traverse (&info->hash->table,
5365 elf_i386_pie_finish_undefweak_symbol,
5366 info);
5367
b34976b6 5368 return TRUE;
252b5132
RH		 5369}
5370
233cc9c1
L		 5371/* Fill PLT/GOT entries and allocate dynamic relocations for local
5372 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5373 It has to be done before elf_link_sort_relocs is called so that
5374 dynamic relocations are properly sorted. */
5375
5376static bfd_boolean
5377elf_i386_output_arch_local_syms
5378 (bfd *output_bfd ATTRIBUTE_UNUSED,
5379 struct bfd_link_info *info,
5380 void *flaginfo ATTRIBUTE_UNUSED,
5381 int (*func) (void *, const char *,
5382 Elf_Internal_Sym *,
5383 asection *,
5384 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5385{
0afcef53
L		 5386 struct elf_x86_link_hash_table *htab
5387 = elf_x86_hash_table (info, I386_ELF_DATA);
233cc9c1
L		 5388 if (htab == NULL)
5389 return FALSE;
5390
5391 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5392 htab_traverse (htab->loc_hash_table,
5393 elf_i386_finish_local_dynamic_symbol,
5394 info);
5395
5396 return TRUE;
5397}
5398
f604c2a2 5399/* Forward declaration. */
765e526c 5400static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
f604c2a2
L		 5401
5402/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
5403 dynamic relocations. */
5404
5405static long
5406elf_i386_get_synthetic_symtab (bfd *abfd,
5407 long symcount ATTRIBUTE_UNUSED,
5408 asymbol **syms ATTRIBUTE_UNUSED,
5409 long dynsymcount,
5410 asymbol **dynsyms,
5411 asymbol **ret)
5412{
f493882d 5413 long count, i, n;
f604c2a2 5414 int j;
f604c2a2 5415 bfd_byte *plt_contents;
f493882d 5416 long relsize;
765e526c
L		 5417 const struct elf_x86_lazy_plt_layout *lazy_plt;
5418 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
5419 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
5420 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
f604c2a2
L		 5421 asection *plt;
5422 bfd_vma got_addr;
f493882d
L		 5423 enum elf_x86_plt_type plt_type;
5424 struct elf_x86_plt plts[] =
3972882e 5425 {
f493882d
L		 5426 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
5427 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
5428 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
5429 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
f604c2a2 5430 };
144bed8d 5431
f604c2a2 5432 *ret = NULL;
144bed8d 5433
f604c2a2
L		 5434 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5435 return 0;
3972882e 5436
f604c2a2
L		 5437 if (dynsymcount <= 0)
5438 return 0;
cca5b8b6 5439
f604c2a2
L		 5440 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
5441 if (relsize <= 0)
5442 return -1;
cca5b8b6 5443
f604c2a2
L		 5444 non_lazy_plt = NULL;
5445 /* Silence GCC 6. */
5446 lazy_plt = NULL;
ee2fdd6f
L		 5447 non_lazy_ibt_plt = NULL;
5448 lazy_ibt_plt = NULL;
f604c2a2 5449 switch (get_elf_i386_backend_data (abfd)->os)
144bed8d 5450 {
f604c2a2
L		 5451 case is_normal:
5452 non_lazy_plt = &elf_i386_non_lazy_plt;
ee2fdd6f
L		 5453 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5454 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 5455 /* Fall through */
5456 case is_vxworks:
5457 lazy_plt = &elf_i386_lazy_plt;
5458 break;
5459 case is_nacl:
5460 lazy_plt = &elf_i386_nacl_plt;
5461 break;
5462 }
5463
5464 got_addr = 0;
3972882e 5465
f604c2a2
L		 5466 count = 0;
5467 for (j = 0; plts[j].name != NULL; j++)
5468 {
5469 plt = bfd_get_section_by_name (abfd, plts[j].name);
90efb642 5470 if (plt == NULL || plt->size == 0)
6f25f223 5471 continue;
533d0af0 5472
f604c2a2
L		 5473 /* Get the PLT section contents. */
5474 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5475 if (plt_contents == NULL)
5476 break;
5477 if (!bfd_get_section_contents (abfd, (asection *) plt,
5478 plt_contents, 0, plt->size))
5479 {
5480 free (plt_contents);
5481 break;
5482 }
5483
5484 /* Check what kind of PLT it is. */
5485 plt_type = plt_unknown;
90efb642
L		 5486 if (plts[j].type == plt_unknown
5487 && (plt->size >= (lazy_plt->plt0_entry_size
5488 + lazy_plt->plt_entry_size)))
f604c2a2
L		 5489 {
5490 /* Match lazy PLT first. */
5491 if (memcmp (plt_contents, lazy_plt->plt0_entry,
5492 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 5493 {
5494 /* The fist entry in the lazy IBT PLT is the same as the
5495 normal lazy PLT. */
5496 if (lazy_ibt_plt != NULL
90efb642 5497 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 5498 lazy_ibt_plt->plt_entry,
5499 lazy_ibt_plt->plt_got_offset) == 0))
5500 plt_type = plt_lazy | plt_second;
5501 else
5502 plt_type = plt_lazy;
5503 }
f604c2a2
L		 5504 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
5505 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 5506 {
5507 /* The fist entry in the PIC lazy IBT PLT is the same as
5508 the normal PIC lazy PLT. */
5509 if (lazy_ibt_plt != NULL
90efb642 5510 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 5511 lazy_ibt_plt->pic_plt_entry,
5512 lazy_ibt_plt->plt_got_offset) == 0))
5513 plt_type = plt_lazy | plt_pic | plt_second;
5514 else
5515 plt_type = plt_lazy | plt_pic;
5516 }
f604c2a2
L		 5517 }
5518
5519 if (non_lazy_plt != NULL
90efb642
L		 5520 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5521 && plt->size >= non_lazy_plt->plt_entry_size)
f604c2a2
L		 5522 {
5523 /* Match non-lazy PLT. */
5524 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5525 non_lazy_plt->plt_got_offset) == 0)
5526 plt_type = plt_non_lazy;
5527 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
5528 non_lazy_plt->plt_got_offset) == 0)
5529 plt_type = plt_pic;
5530 }
5531
ee2fdd6f 5532 if ((non_lazy_ibt_plt != NULL)
90efb642
L		 5533 && (plt_type == plt_unknown || plt_type == plt_second)
5534 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
ee2fdd6f
L		 5535 {
5536 if (memcmp (plt_contents,
5537 non_lazy_ibt_plt->plt_entry,
5538 non_lazy_ibt_plt->plt_got_offset) == 0)
5539 {
5540 /* Match IBT PLT. */
5541 plt_type = plt_second;
5542 non_lazy_plt = non_lazy_ibt_plt;
5543 }
5544 else if (memcmp (plt_contents,
5545 non_lazy_ibt_plt->pic_plt_entry,
5546 non_lazy_ibt_plt->plt_got_offset) == 0)
5547 {
5548 /* Match PIC IBT PLT. */
5549 plt_type = plt_second | plt_pic;
5550 non_lazy_plt = non_lazy_ibt_plt;
5551 }
5552 }
5553
f604c2a2 5554 if (plt_type == plt_unknown)
37c0b6ee
L		 5555 {
5556 free (plt_contents);
5557 continue;
5558 }
3972882e 5559
f604c2a2
L		 5560 plts[j].sec = plt;
5561 plts[j].type = plt_type;
ec1f73bb 5562
f604c2a2
L		 5563 if ((plt_type & plt_lazy))
5564 {
5565 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5566 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5567 /* Skip PLT0 in lazy PLT. */
5568 i = 1;
5569 }
5570 else
5571 {
5572 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5573 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5574 i = 0;
5575 }
fca6ae69 5576
ee2fdd6f
L		 5577 /* Skip lazy PLT when the second PLT is used. */
5578 if ((plt_type & (plt_lazy | plt_second))
5579 == (plt_lazy | plt_second))
5580 plts[j].count = 0;
5581 else
5582 {
5583 n = plt->size / plts[j].plt_entry_size;
5584 plts[j].count = n;
5585 count += n - i;
5586 }
f604c2a2
L		 5587
5588 plts[j].contents = plt_contents;
5589
5590 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
5591 if ((plt_type & plt_pic))
5592 got_addr = (bfd_vma) -1;
144bed8d
L		 5593 }
5594
f493882d
L		 5595 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5596 got_addr, plts, dynsyms,
5597 ret);
4c45e5c9
JJ		 5598}
5599
f604c2a2
L		 5600/* Set up i386 GNU properties. Return the first relocatable ELF input
5601 with GNU properties if found. Otherwise, return NULL. */
5602
5603static bfd *
5604elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
5605{
a6798bab 5606 struct elf_x86_plt_layout_table plt_layout;
f604c2a2 5607
a6798bab
L		 5608 plt_layout.normal_target = FALSE;
5609 plt_layout.is_vxworks = FALSE;
f604c2a2
L		 5610 switch (get_elf_i386_backend_data (info->output_bfd)->os)
5611 {
5612 case is_normal:
a6798bab
L		 5613 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5614 plt_layout.non_lazy_plt = &elf_i386_non_lazy_plt;
5615 plt_layout.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5616 plt_layout.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5617 plt_layout.normal_target = TRUE;
f604c2a2
L		 5618 break;
5619 case is_vxworks:
a6798bab
L		 5620 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5621 plt_layout.non_lazy_plt = NULL;
5622 plt_layout.lazy_ibt_plt = NULL;
5623 plt_layout.non_lazy_ibt_plt = NULL;
5624 plt_layout.is_vxworks = TRUE;
f604c2a2
L		 5625 break;
5626 case is_nacl:
a6798bab
L		 5627 plt_layout.lazy_plt = &elf_i386_nacl_plt;
5628 plt_layout.non_lazy_plt = NULL;
5629 plt_layout.lazy_ibt_plt = NULL;
5630 plt_layout.non_lazy_ibt_plt = NULL;
f604c2a2
L		 5631 break;
5632 }
5633
a6798bab 5634 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
f604c2a2
L		 5635}
5636
6d00b590 5637#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 5638#define TARGET_LITTLE_NAME "elf32-i386"
5639#define ELF_ARCH bfd_arch_i386
ae95ffa6 5640#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 5641#define ELF_MACHINE_CODE EM_386
5642#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 5643
5644#define elf_backend_can_gc_sections 1
51b64d56 5645#define elf_backend_can_refcount 1
252b5132
RH		 5646#define elf_backend_want_got_plt 1
5647#define elf_backend_plt_readonly 1
5648#define elf_backend_want_plt_sym 0
5649#define elf_backend_got_header_size 12
e41b3a13 5650#define elf_backend_plt_alignment 4
64f52338 5651#define elf_backend_dtrel_excludes_plt 1
f7483970 5652#define elf_backend_extern_protected_data 1
bedfd056 5653#define elf_backend_caches_rawsize 1
5474d94f 5654#define elf_backend_want_dynrelro 1
252b5132 5655
8c29f035
AM		 5656/* Support RELA for objdump of prelink objects. */
5657#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 5658#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5659
dd5724d5 5660#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
dd5724d5 5661#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 5662#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 5663#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5 5664
13285a1b 5665#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 5666#define elf_backend_check_relocs elf_i386_check_relocs
f604c2a2 5667#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
0ac8d2ca 5668#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 5669#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5670#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
233cc9c1 5671#define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
c5fccbec
DJ		 5672#define elf_backend_grok_prstatus elf_i386_grok_prstatus
5673#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 5674#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 5675#define elf_backend_relocate_section elf_i386_relocate_section
5676#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
f604c2a2 5677#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
dd5724d5 5678
252b5132 5679#include "elf32-target.h"
2bc3c89a
AM		 5680
5681/* FreeBSD support. */
5682
5683#undef TARGET_LITTLE_SYM
6d00b590 5684#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 5685#undef TARGET_LITTLE_NAME
5686#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 5687#undef ELF_OSABI
5688#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 5689
5690/* The kernel recognizes executables as valid only if they carry a
5691 "FreeBSD" label in the ELF header. So we put this label on all
5692 executables and (for simplicity) also all other object files. */
5693
2bc3c89a 5694static void
d8045f23 5695elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 5696{
78245035 5697 _bfd_elf_post_process_headers (abfd, info);
2bc3c89a 5698
2bc3c89a 5699#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 5700 {
5701 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5702 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5703 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5704 }
caf47ea6 5705#endif
2bc3c89a
AM		 5706}
5707
5708#undef elf_backend_post_process_headers
d8045f23 5709#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC		 5710#undef elf32_bed
5711#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 5712
d8045f23
NC		 5713#undef elf_backend_add_symbol_hook
5714
2bc3c89a 5715#include "elf32-target.h"
eac338cf 5716
a6cc6b3b
RO		 5717/* Solaris 2. */
5718
5719#undef TARGET_LITTLE_SYM
6d00b590 5720#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO		 5721#undef TARGET_LITTLE_NAME
5722#define TARGET_LITTLE_NAME "elf32-i386-sol2"
5723
914082d1
L		 5724#undef elf_backend_post_process_headers
5725
a6cc6b3b
RO		 5726/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5727 objects won't be recognized. */
5728#undef ELF_OSABI
5729
5730#undef elf32_bed
5731#define elf32_bed elf32_i386_sol2_bed
5732
7dc98aea
RO		 5733/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5734 boundary. */
84865015 5735#undef elf_backend_static_tls_alignment
7dc98aea
RO		 5736#define elf_backend_static_tls_alignment 8
5737
a6cc6b3b
RO		 5738/* The Solaris 2 ABI requires a plt symbol on all platforms.
5739
5740 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5741 File, p.63. */
84865015 5742#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 5743#define elf_backend_want_plt_sym 1
5744
84865015
NC		 5745#undef elf_backend_strtab_flags
5746#define elf_backend_strtab_flags SHF_STRINGS
5747
5522f910
NC		 5748/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
5749 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5750 FALSE otherwise. ISECTION is the best guess matching section from the
5751 input bfd IBFD, but it might be NULL. */
5752
84865015 5753static bfd_boolean
5522f910
NC		 5754elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5755 bfd *obfd ATTRIBUTE_UNUSED,
5756 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5757 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 5758{
5759 /* PR 19938: FIXME: Need to add code for setting the sh_info
5522f910
NC		 5760 and sh_link fields of Solaris specific section types. */
5761 return FALSE;
84865015 5762
5522f910 5763 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
84865015
NC		 5764 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
5765
5766http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
5767
5768 The following values should be set:
5769
5770Type Link Info
5771-----------------------------------------------------------------------------
5772SHT_SUNW_ancillary The section header index of 0
5773 [0x6fffffee] the associated string table.
5774
5775SHT_SUNW_capinfo The section header index of For a dynamic object, the
5776 [0x6ffffff0] the associated symbol table. section header index of
5777 the associated
5778 SHT_SUNW_capchain table,
5779 otherwise 0.
5780
5781SHT_SUNW_symsort The section header index of 0
5782 [0x6ffffff1] the associated symbol table.
5783
5784SHT_SUNW_tlssort The section header index of 0
5785 [0x6ffffff2] the associated symbol table.
5786
5787SHT_SUNW_LDYNSYM The section header index of One greater than the
5788 [0x6ffffff3] the associated string table. symbol table index of the
5789 This index is the same string last local symbol,
5790 table used by the SHT_DYNSYM STB_LOCAL. Since
5791 section. SHT_SUNW_LDYNSYM only
5792 contains local symbols,
5793 sh_info is equivalent to
5794 the number of symbols in
5795 the table.
5796
5797SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
5798 [0x6ffffff5] the section header index of to named strings, the
5799 the associated section header index of
5800 SHT_SUNW_capinfo table, the associated string
5801 otherwise 0. table, otherwise 0.
5802
5803SHT_SUNW_move The section header index of 0
5804 [0x6ffffffa] the associated symbol table.
5805
5806SHT_SUNW_COMDAT 0 0
5807 [0x6ffffffb]
5808
5809SHT_SUNW_syminfo The section header index of The section header index
5810 [0x6ffffffc] the associated symbol table. of the associated
5811 .dynamic section.
5812
5813SHT_SUNW_verdef The section header index of The number of version
5814 [0x6ffffffd] the associated string table. definitions within the
5815 section.
5816
5817SHT_SUNW_verneed The section header index of The number of version
5818 [0x6ffffffe] the associated string table. dependencies within the
5819 section.
5820
5821SHT_SUNW_versym The section header index of 0
5822 [0x6fffffff] the associated symbol table. */
84865015
NC		 5823}
5824
5522f910
NC		 5825#undef elf_backend_copy_special_section_fields
5826#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
84865015 5827
a6cc6b3b
RO		 5828#include "elf32-target.h"
5829
bf64a951
L		 5830/* Intel MCU support. */
5831
5832static bfd_boolean
5833elf32_iamcu_elf_object_p (bfd *abfd)
5834{
5835 /* Set the right machine number for an IAMCU elf32 file. */
5836 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5837 return TRUE;
5838}
5839
5840#undef TARGET_LITTLE_SYM
5841#define TARGET_LITTLE_SYM iamcu_elf32_vec
5842#undef TARGET_LITTLE_NAME
5843#define TARGET_LITTLE_NAME "elf32-iamcu"
84865015 5844#undef ELF_ARCH
bf64a951
L		 5845#define ELF_ARCH bfd_arch_iamcu
5846
5847#undef ELF_MACHINE_CODE
5848#define ELF_MACHINE_CODE EM_IAMCU
5849
5850#undef ELF_OSABI
5851
5852#undef elf32_bed
5853#define elf32_bed elf32_iamcu_bed
5854
5855#undef elf_backend_object_p
5856#define elf_backend_object_p elf32_iamcu_elf_object_p
5857
5858#undef elf_backend_static_tls_alignment
5859
5860#undef elf_backend_want_plt_sym
5861#define elf_backend_want_plt_sym 0
5862
84865015 5863#undef elf_backend_strtab_flags
5522f910 5864#undef elf_backend_copy_special_section_fields
84865015 5865
bf64a951
L		 5866#include "elf32-target.h"
5867
5868/* Restore defaults. */
5869#undef ELF_ARCH
5870#define ELF_ARCH bfd_arch_i386
5871#undef ELF_MACHINE_CODE
5872#define ELF_MACHINE_CODE EM_386
5873
a27e4371
RM		 5874/* Native Client support. */
5875
5876#undef TARGET_LITTLE_SYM
6d00b590 5877#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 5878#undef TARGET_LITTLE_NAME
5879#define TARGET_LITTLE_NAME "elf32-i386-nacl"
5880#undef elf32_bed
5881#define elf32_bed elf32_i386_nacl_bed
5882
5883#undef ELF_MAXPAGESIZE
5884#define ELF_MAXPAGESIZE 0x10000
5885
5886/* Restore defaults. */
5887#undef ELF_OSABI
5888#undef elf_backend_want_plt_sym
5889#define elf_backend_want_plt_sym 0
5890#undef elf_backend_post_process_headers
a27e4371
RM		 5891#undef elf_backend_static_tls_alignment
5892
5893/* NaCl uses substantially different PLT entries for the same effects. */
5894
5895#undef elf_backend_plt_alignment
5896#define elf_backend_plt_alignment 5
5897#define NACL_PLT_ENTRY_SIZE 64
5898#define NACLMASK 0xe0 /* 32-byte alignment mask. */
5899
5900static const bfd_byte elf_i386_nacl_plt0_entry[] =
5901 {
5902 0xff, 0x35, /* pushl contents of address */
5903 0, 0, 0, 0, /* replaced with address of .got + 4. */
5904 0x8b, 0x0d, /* movl contents of address, %ecx */
5905 0, 0, 0, 0, /* replaced with address of .got + 8. */
5906 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5907 0xff, 0xe1 /* jmp *%ecx */
5908 };
5909
5910static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5911 {
5912 0x8b, 0x0d, /* movl contents of address, %ecx */
5913 0, 0, 0, 0, /* replaced with GOT slot address. */
5914 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5915 0xff, 0xe1, /* jmp *%ecx */
5916
5917 /* Pad to the next 32-byte boundary with nop instructions. */
5918 0x90,
5919 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5920 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5921
5922 /* Lazy GOT entries point here (32-byte aligned). */
5923 0x68, /* pushl immediate */
5924 0, 0, 0, 0, /* replaced with reloc offset. */
5925 0xe9, /* jmp relative */
5926 0, 0, 0, 0, /* replaced with offset to .plt. */
5927
5928 /* Pad to the next 32-byte boundary with nop instructions. */
5929 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5930 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5931 0x90, 0x90
5932 };
5933
5934static const bfd_byte
5935elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5936 {
5937 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5938 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5939 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5940 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 5941
5942 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5943 so pad to that size with nop instructions. */
5944 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 5945 };
5946
5947static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5948 {
5949 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5950 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5951 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5952 0xff, 0xe1, /* jmp *%ecx */
5953
5954 /* Pad to the next 32-byte boundary with nop instructions. */
5955 0x90,
5956 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5957 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5958
5959 /* Lazy GOT entries point here (32-byte aligned). */
5960 0x68, /* pushl immediate */
5961 0, 0, 0, 0, /* replaced with offset into relocation table. */
5962 0xe9, /* jmp relative */
5963 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5964
5965 /* Pad to the next 32-byte boundary with nop instructions. */
5966 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5967 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5968 0x90, 0x90
5969 };
5970
5971static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5972 {
5973#if (PLT_CIE_LENGTH != 20 \
5974 || PLT_FDE_LENGTH != 36 \
5975 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5976 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5977# error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5978#endif
5979 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5980 0, 0, 0, 0, /* CIE ID */
5981 1, /* CIE version */
5982 'z', 'R', 0, /* Augmentation string */
5983 1, /* Code alignment factor */
5984 0x7c, /* Data alignment factor: -4 */
5985 8, /* Return address column */
5986 1, /* Augmentation size */
5987 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5988 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5989 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5990 DW_CFA_nop, DW_CFA_nop,
5991
5992 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5993 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5994 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5995 0, 0, 0, 0, /* .plt size goes here */
5996 0, /* Augmentation size */
5997 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5998 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5999 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
6000 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6001 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6002 13, /* Block length */
6003 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
6004 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
6005 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6006 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
6007 DW_CFA_nop, DW_CFA_nop
6008 };
6009
765e526c 6010static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
a27e4371
RM		 6011 {
6012 elf_i386_nacl_plt0_entry, /* plt0_entry */
6013 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
a27e4371
RM		 6014 elf_i386_nacl_plt_entry, /* plt_entry */
6015 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
765e526c
L		 6016 2, /* plt0_got1_offset */
6017 8, /* plt0_got2_offset */
6018 0, /* plt0_got2_insn_end */
a27e4371
RM		 6019 2, /* plt_got_offset */
6020 33, /* plt_reloc_offset */
6021 38, /* plt_plt_offset */
765e526c
L		 6022 0, /* plt_got_insn_size */
6023 0, /* plt_plt_insn_end */
a27e4371
RM		 6024 32, /* plt_lazy_offset */
6025 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6026 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6027 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
f604c2a2 6028 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
a27e4371
RM		 6029 };
6030
6031static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6032 {
f604c2a2
L		 6033 0x90, /* plt0_pad_byte: nop insn */
6034 is_nacl /* os */
a27e4371
RM		 6035 };
6036
64b384e1
RM		 6037static bfd_boolean
6038elf32_i386_nacl_elf_object_p (bfd *abfd)
6039{
6040 /* Set the right machine number for a NaCl i386 ELF32 file. */
6041 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6042 return TRUE;
6043}
6044
a27e4371
RM		 6045#undef elf_backend_arch_data
6046#define elf_backend_arch_data &elf_i386_nacl_arch_bed
6047
64b384e1
RM		 6048#undef elf_backend_object_p
6049#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 6050#undef elf_backend_modify_segment_map
6051#define elf_backend_modify_segment_map nacl_modify_segment_map
6052#undef elf_backend_modify_program_headers
6053#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 6054#undef elf_backend_final_write_processing
6055#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 6056
a27e4371
RM		 6057#include "elf32-target.h"
6058
5a68afcf 6059/* Restore defaults. */
64b384e1 6060#undef elf_backend_object_p
5a68afcf
RM		 6061#undef elf_backend_modify_segment_map
6062#undef elf_backend_modify_program_headers
887badb3 6063#undef elf_backend_final_write_processing
5a68afcf 6064
eac338cf
PB		 6065/* VxWorks support. */
6066
6067#undef TARGET_LITTLE_SYM
6d00b590 6068#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 6069#undef TARGET_LITTLE_NAME
6070#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 6071#undef ELF_OSABI
1587442d
L		 6072#undef ELF_MAXPAGESIZE
6073#define ELF_MAXPAGESIZE 0x1000
a27e4371
RM		 6074#undef elf_backend_plt_alignment
6075#define elf_backend_plt_alignment 4
eac338cf 6076
23209a78
RM		 6077static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6078 {
6079 0x90, /* plt0_pad_byte */
f604c2a2 6080 is_vxworks /* os */
23209a78 6081 };
eac338cf 6082
23209a78
RM		 6083#undef elf_backend_arch_data
6084#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 6085
13285a1b 6086#undef elf_backend_relocs_compatible
eac338cf
PB		 6087#undef elf_backend_add_symbol_hook
6088#define elf_backend_add_symbol_hook \
6089 elf_vxworks_add_symbol_hook
6090#undef elf_backend_link_output_symbol_hook
6091#define elf_backend_link_output_symbol_hook \
9c72ff84 6092 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 6093#undef elf_backend_emit_relocs
6094#define elf_backend_emit_relocs elf_vxworks_emit_relocs
6095#undef elf_backend_final_write_processing
6096#define elf_backend_final_write_processing \
6097 elf_vxworks_final_write_processing
7dc98aea 6098#undef elf_backend_static_tls_alignment
eac338cf
PB		 6099
6100/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6101 define it. */
6102#undef elf_backend_want_plt_sym
6103#define elf_backend_want_plt_sym 1
6104
6105#undef elf32_bed
6106#define elf32_bed elf32_i386_vxworks_bed
6107
6108#include "elf32-target.h"
GDB Binutils - Deliverables
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