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[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
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252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
82704155 2 Copyright (C) 1993-2019 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
daf1c414
L		 185#define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32)
186
aebcc8ff
L		 187#define X86_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32)
188
252b5132 189#ifdef DEBUG_GEN_RELOC
55fd94b0
AM		 190#define TRACE(str) \
191 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH		 192#else
193#define TRACE(str)
194#endif
195
196static reloc_howto_type *
f3185997 197elf_i386_reloc_type_lookup (bfd *abfd,
55fd94b0 198 bfd_reloc_code_real_type code)
252b5132
RH		 199{
200 switch (code)
201 {
202 case BFD_RELOC_NONE:
203 TRACE ("BFD_RELOC_NONE");
55fd94b0 204 return &elf_howto_table[R_386_NONE];
252b5132
RH		 205
206 case BFD_RELOC_32:
207 TRACE ("BFD_RELOC_32");
55fd94b0 208 return &elf_howto_table[R_386_32];
252b5132
RH		 209
210 case BFD_RELOC_CTOR:
211 TRACE ("BFD_RELOC_CTOR");
55fd94b0 212 return &elf_howto_table[R_386_32];
252b5132
RH		 213
214 case BFD_RELOC_32_PCREL:
215 TRACE ("BFD_RELOC_PC32");
55fd94b0 216 return &elf_howto_table[R_386_PC32];
252b5132
RH		 217
218 case BFD_RELOC_386_GOT32:
219 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 220 return &elf_howto_table[R_386_GOT32];
252b5132
RH		 221
222 case BFD_RELOC_386_PLT32:
223 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 224 return &elf_howto_table[R_386_PLT32];
252b5132
RH		 225
226 case BFD_RELOC_386_COPY:
227 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 228 return &elf_howto_table[R_386_COPY];
252b5132
RH		 229
230 case BFD_RELOC_386_GLOB_DAT:
231 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 232 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH		 233
234 case BFD_RELOC_386_JUMP_SLOT:
235 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 236 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH		 237
238 case BFD_RELOC_386_RELATIVE:
239 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 240 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH		 241
242 case BFD_RELOC_386_GOTOFF:
243 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 244 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH		 245
246 case BFD_RELOC_386_GOTPC:
247 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 248 return &elf_howto_table[R_386_GOTPC];
252b5132 249
37e55690
JJ		 250 /* These relocs are a GNU extension. */
251 case BFD_RELOC_386_TLS_TPOFF:
252 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 253 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ		 254
255 case BFD_RELOC_386_TLS_IE:
256 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 257 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ		 258
259 case BFD_RELOC_386_TLS_GOTIE:
260 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 261 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 262
13ae64f3
JJ		 263 case BFD_RELOC_386_TLS_LE:
264 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 265 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ		 266
267 case BFD_RELOC_386_TLS_GD:
268 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 269 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ		 270
271 case BFD_RELOC_386_TLS_LDM:
272 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 273 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 274
252b5132
RH		 275 case BFD_RELOC_16:
276 TRACE ("BFD_RELOC_16");
55fd94b0 277 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH		 278
279 case BFD_RELOC_16_PCREL:
280 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 281 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH		 282
283 case BFD_RELOC_8:
284 TRACE ("BFD_RELOC_8");
55fd94b0 285 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH		 286
287 case BFD_RELOC_8_PCREL:
288 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 289 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 290
13ae64f3
JJ		 291 /* Common with Sun TLS implementation. */
292 case BFD_RELOC_386_TLS_LDO_32:
293 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 294 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ		 295
296 case BFD_RELOC_386_TLS_IE_32:
297 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 298 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ		 299
300 case BFD_RELOC_386_TLS_LE_32:
301 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 302 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ		 303
304 case BFD_RELOC_386_TLS_DTPMOD32:
305 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 306 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ		 307
308 case BFD_RELOC_386_TLS_DTPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 310 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ		 311
312 case BFD_RELOC_386_TLS_TPOFF32:
313 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 314 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 315
1788fc08
L		 316 case BFD_RELOC_SIZE32:
317 TRACE ("BFD_RELOC_SIZE32");
318 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
319
67a4f2b7
AO		 320 case BFD_RELOC_386_TLS_GOTDESC:
321 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
322 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
323
324 case BFD_RELOC_386_TLS_DESC_CALL:
325 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
326 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
327
328 case BFD_RELOC_386_TLS_DESC:
329 TRACE ("BFD_RELOC_386_TLS_DESC");
330 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
331
cbe950e9
L		 332 case BFD_RELOC_386_IRELATIVE:
333 TRACE ("BFD_RELOC_386_IRELATIVE");
2a750708 334 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
cbe950e9 335
02a86693
L		 336 case BFD_RELOC_386_GOT32X:
337 TRACE ("BFD_RELOC_386_GOT32X");
338 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
339
252b5132
RH		 340 case BFD_RELOC_VTABLE_INHERIT:
341 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 342 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH		 343
344 case BFD_RELOC_VTABLE_ENTRY:
345 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 346 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH		 347
348 default:
f3185997
NC		 349 TRACE ("Unknown");
350 /* xgettext:c-format */
e8f5af78 351 _bfd_error_handler (_("%pB: unsupported relocation type: %#x"),
f3185997
NC		 352 abfd, (int) code);
353 bfd_set_error (bfd_error_bad_value);
354 return NULL;
252b5132 355 }
252b5132
RH		 356}
357
157090f7
AM		 358static reloc_howto_type *
359elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
360 const char *r_name)
361{
362 unsigned int i;
363
364 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
365 if (elf_howto_table[i].name != NULL
366 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
367 return &elf_howto_table[i];
368
369 return NULL;
370}
371
142411ca 372static reloc_howto_type *
b366503e 373elf_i386_rtype_to_howto (unsigned r_type)
252b5132 374{
dc47f327
AM		 375 unsigned int indx;
376
377 if ((indx = r_type) >= R_386_standard
378 && ((indx = r_type - R_386_ext_offset) - R_386_standard
379 >= R_386_ext - R_386_standard)
13ae64f3 380 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520
L		 381 >= R_386_ext2 - R_386_ext)
382 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
383 >= R_386_vt - R_386_ext2))
f3185997 384 return NULL;
06614111
NC		 385 /* PR 17512: file: 0f67f69d. */
386 if (elf_howto_table [indx].type != r_type)
387 return NULL;
142411ca
L		 388 return &elf_howto_table[indx];
389}
390
f3185997
NC		 391static bfd_boolean
392elf_i386_info_to_howto_rel (bfd *abfd,
142411ca
L		 393 arelent *cache_ptr,
394 Elf_Internal_Rela *dst)
395{
396 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
f3185997 397
b366503e 398 if ((cache_ptr->howto = elf_i386_rtype_to_howto (r_type)) == NULL)
f3185997
NC		 399 {
400 /* xgettext:c-format */
401 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
402 abfd, r_type);
403 bfd_set_error (bfd_error_bad_value);
404 return FALSE;
405 }
406
407 return TRUE;
252b5132
RH		 408}
409
410/* Return whether a symbol name implies a local label. The UnixWare
411 2.1 cc generates temporary symbols that start with .X, so we
412 recognize them here. FIXME: do other SVR4 compilers also use .X?.
413 If so, we should move the .X recognition into
414 _bfd_elf_is_local_label_name. */
415
b34976b6 416static bfd_boolean
55fd94b0 417elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH		 418{
419 if (name[0] == '.' && name[1] == 'X')
b34976b6 420 return TRUE;
252b5132
RH		 421
422 return _bfd_elf_is_local_label_name (abfd, name);
423}
424\f
38701953 425/* Support for core dump NOTE sections. */
61adc1a4 426
b34976b6 427static bfd_boolean
55fd94b0 428elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM		 429{
430 int offset;
eea6121a 431 size_t size;
38701953 432
61adc1a4 433 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 434 {
61adc1a4
NC		 435 int pr_version = bfd_get_32 (abfd, note->descdata);
436
437 if (pr_version != 1)
07d6d2b8 438 return FALSE;
61adc1a4
NC		 439
440 /* pr_cursig */
228e534f 441 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
61adc1a4
NC		 442
443 /* pr_pid */
228e534f 444 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
61adc1a4
NC		 445
446 /* pr_reg */
447 offset = 28;
eea6121a 448 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC		 449 }
450 else
451 {
452 switch (note->descsz)
453 {
454 default:
455 return FALSE;
38701953 456
61adc1a4
NC		 457 case 144: /* Linux/i386 */
458 /* pr_cursig */
228e534f 459 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 460
61adc1a4 461 /* pr_pid */
228e534f 462 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
38701953 463
61adc1a4
NC		 464 /* pr_reg */
465 offset = 72;
eea6121a 466 size = 68;
38701953 467
61adc1a4
NC		 468 break;
469 }
38701953
AM		 470 }
471
472 /* Make a ".reg/999" section. */
473 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 474 size, note->descpos + offset);
38701953
AM		 475}
476
b34976b6 477static bfd_boolean
55fd94b0 478elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 479{
61adc1a4 480 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 481 {
61adc1a4
NC		 482 int pr_version = bfd_get_32 (abfd, note->descdata);
483
484 if (pr_version != 1)
b34976b6 485 return FALSE;
38701953 486
228e534f 487 elf_tdata (abfd)->core->program
61adc1a4 488 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
228e534f 489 elf_tdata (abfd)->core->command
61adc1a4
NC		 490 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
491 }
492 else
493 {
494 switch (note->descsz)
495 {
496 default:
497 return FALSE;
498
499 case 124: /* Linux/i386 elf_prpsinfo. */
228e534f 500 elf_tdata (abfd)->core->pid
261b8d08 501 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 502 elf_tdata (abfd)->core->program
61adc1a4 503 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 504 elf_tdata (abfd)->core->command
61adc1a4
NC		 505 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
506 }
38701953
AM		 507 }
508
509 /* Note that for some reason, a spurious space is tacked
510 onto the end of the args in some (at least one anyway)
511 implementations, so strip it off if it exists. */
38701953 512 {
228e534f 513 char *command = elf_tdata (abfd)->core->command;
38701953
AM		 514 int n = strlen (command);
515
516 if (0 < n && command[n - 1] == ' ')
517 command[n - 1] = '\0';
518 }
519
b34976b6 520 return TRUE;
38701953
AM		 521}
522\f
523/* Functions for the i386 ELF linker.
524
525 In order to gain some understanding of code in this file without
526 knowing all the intricate details of the linker, note the
527 following:
528
529 Functions named elf_i386_* are called by external routines, other
530 functions are only called locally. elf_i386_* functions appear
531 in this file more or less in the order in which they are called
532 from external routines. eg. elf_i386_check_relocs is called
533 early in the link process, elf_i386_finish_dynamic_sections is
534 one of the last functions. */
535
f604c2a2 536/* The size in bytes of an entry in the lazy procedure linkage table. */
252b5132 537
f604c2a2 538#define LAZY_PLT_ENTRY_SIZE 16
252b5132 539
f604c2a2
L		 540/* The size in bytes of an entry in the non-lazy procedure linkage
541 table. */
252b5132 542
f604c2a2
L		 543#define NON_LAZY_PLT_ENTRY_SIZE 8
544
545/* The first entry in an absolute lazy procedure linkage table looks
546 like this. See the SVR4 ABI i386 supplement to see how this works.
547 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
548
549static const bfd_byte elf_i386_lazy_plt0_entry[12] =
252b5132
RH		 550{
551 0xff, 0x35, /* pushl contents of address */
552 0, 0, 0, 0, /* replaced with address of .got + 4. */
553 0xff, 0x25, /* jmp indirect */
eac338cf 554 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 555};
556
f604c2a2
L		 557/* Subsequent entries in an absolute lazy procedure linkage table look
558 like this. */
252b5132 559
f604c2a2 560static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 561{
562 0xff, 0x25, /* jmp indirect */
563 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
564 0x68, /* pushl immediate */
565 0, 0, 0, 0, /* replaced with offset into relocation table. */
566 0xe9, /* jmp relative */
567 0, 0, 0, 0 /* replaced with offset to start of .plt. */
568};
569
f604c2a2
L		 570/* The first entry in a PIC lazy procedure linkage table look like
571 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
572 lazy_plt->plt0_pad_byte. */
252b5132 573
f604c2a2 574static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
252b5132
RH		 575{
576 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 577 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 578};
579
f604c2a2
L		 580/* Subsequent entries in a PIC lazy procedure linkage table look like
581 this. */
252b5132 582
f604c2a2 583static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 584{
585 0xff, 0xa3, /* jmp *offset(%ebx) */
586 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
587 0x68, /* pushl immediate */
588 0, 0, 0, 0, /* replaced with offset into relocation table. */
589 0xe9, /* jmp relative */
590 0, 0, 0, 0 /* replaced with offset to start of .plt. */
591};
592
f604c2a2 593/* Entries in the non-lazy procedure linkage table look like this. */
dd7e64d4 594
f604c2a2 595static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 596{
597 0xff, 0x25, /* jmp indirect */
598 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
599 0x66, 0x90 /* xchg %ax,%ax */
600};
601
f604c2a2
L		 602/* Entries in the PIC non-lazy procedure linkage table look like
603 this. */
dd7e64d4 604
f604c2a2 605static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 606{
607 0xff, 0xa3, /* jmp *offset(%ebx) */
608 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
610};
611
ee2fdd6f
L		 612/* The first entry in an absolute IBT-enabled lazy procedure linkage
613 table looks like this. */
614
615static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
616{
07d6d2b8
AM		 617 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
618 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
619 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
ee2fdd6f
L		 620};
621
622/* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
623 table look like this. Subsequent entries for a PIC IBT-enabled lazy
624 procedure linkage table are the same. */
625
626static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
627{
07d6d2b8
AM		 628 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
629 0x68, 0, 0, 0, 0, /* pushl immediate */
630 0xe9, 0, 0, 0, 0, /* jmp relative */
631 0x66, 0x90 /* xchg %ax,%ax */
ee2fdd6f
L		 632};
633
634/* The first entry in a PIC IBT-enabled lazy procedure linkage table
635 look like. */
636
637static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
638{
639 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
07d6d2b8
AM		 640 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
641 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
ee2fdd6f
L		 642};
643
644/* Entries for branches with IBT-enabled in the absolute non-lazey
645 procedure linkage table look like this. They have the same size
646 as the lazy PLT entry. */
647
648static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
649{
07d6d2b8 650 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
ee2fdd6f
L		 651 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
652 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
653};
654
655/* Entries for branches with IBT-enabled in the PIC non-lazey procedure
656 linkage table look like this. They have the same size as the lazy
657 PLT entry. */
658
659static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
660{
07d6d2b8 661 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
ee2fdd6f
L		 662 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
663 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
664};
665
f604c2a2 666/* .eh_frame covering the lazy .plt section. */
e41b3a13 667
f604c2a2 668static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
e41b3a13 669{
e41b3a13
JJ		 670 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
671 0, 0, 0, 0, /* CIE ID */
672 1, /* CIE version */
673 'z', 'R', 0, /* Augmentation string */
674 1, /* Code alignment factor */
675 0x7c, /* Data alignment factor */
676 8, /* Return address column */
677 1, /* Augmentation size */
678 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
679 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
680 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
681 DW_CFA_nop, DW_CFA_nop,
682
683 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
684 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
685 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
686 0, 0, 0, 0, /* .plt size goes here */
687 0, /* Augmentation size */
688 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
689 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
690 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
691 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
692 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
693 11, /* Block length */
694 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
695 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
696 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
28ede8be 697 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
e41b3a13
JJ		 698 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
699};
700
ee2fdd6f
L		 701/* .eh_frame covering the lazy .plt section with IBT-enabled. */
702
703static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
704{
705 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
706 0, 0, 0, 0, /* CIE ID */
707 1, /* CIE version */
708 'z', 'R', 0, /* Augmentation string */
709 1, /* Code alignment factor */
710 0x7c, /* Data alignment factor */
711 8, /* Return address column */
712 1, /* Augmentation size */
713 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
714 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
715 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
716 DW_CFA_nop, DW_CFA_nop,
717
718 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
719 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
720 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
721 0, 0, 0, 0, /* .plt size goes here */
722 0, /* Augmentation size */
723 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
724 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
725 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
726 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
727 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
728 11, /* Block length */
729 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
730 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
731 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
732 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
733 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
734};
735
f604c2a2 736/* .eh_frame covering the non-lazy .plt section. */
fff53dae 737
f604c2a2 738static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
fff53dae
L		 739{
740#define PLT_GOT_FDE_LENGTH 16
741 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
742 0, 0, 0, 0, /* CIE ID */
743 1, /* CIE version */
744 'z', 'R', 0, /* Augmentation string */
745 1, /* Code alignment factor */
746 0x7c, /* Data alignment factor */
747 8, /* Return address column */
748 1, /* Augmentation size */
749 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
750 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
751 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
752 DW_CFA_nop, DW_CFA_nop,
753
754 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
755 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
f604c2a2
L		 756 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
757 0, 0, 0, 0, /* non-lazy .plt size goes here */
fff53dae
L		 758 0, /* Augmentation size */
759 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
760};
761
25e762b9 762/* These are the standard parameters. */
765e526c 763static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
25e762b9 764 {
07d6d2b8
AM		 765 elf_i386_lazy_plt0_entry, /* plt0_entry */
766 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
767 elf_i386_lazy_plt_entry, /* plt_entry */
768 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
92e68c1d
L		 769 NULL, /* plt_tlsdesc_entry */
770 0, /* plt_tlsdesc_entry_size*/
771 0, /* plt_tlsdesc_got1_offset */
772 0, /* plt_tlsdesc_got2_offset */
773 0, /* plt_tlsdesc_got1_insn_end */
774 0, /* plt_tlsdesc_got2_insn_end */
07d6d2b8
AM		 775 2, /* plt0_got1_offset */
776 8, /* plt0_got2_offset */
777 0, /* plt0_got2_insn_end */
778 2, /* plt_got_offset */
779 7, /* plt_reloc_offset */
780 12, /* plt_plt_offset */
781 0, /* plt_got_insn_size */
782 0, /* plt_plt_insn_end */
783 6, /* plt_lazy_offset */
784 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
785 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
786 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
f604c2a2
L		 787 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
788 };
789
765e526c 790static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
f604c2a2 791 {
07d6d2b8
AM		 792 elf_i386_non_lazy_plt_entry, /* plt_entry */
793 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
794 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
795 2, /* plt_got_offset */
796 0, /* plt_got_insn_size */
797 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
f604c2a2 798 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
25e762b9 799 };
ee2fdd6f 800
765e526c 801static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
ee2fdd6f 802 {
07d6d2b8 803 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
ee2fdd6f 804 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
07d6d2b8
AM		 805 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
806 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
92e68c1d
L		 807 NULL, /* plt_tlsdesc_entry */
808 0, /* plt_tlsdesc_entry_size*/
809 0, /* plt_tlsdesc_got1_offset */
810 0, /* plt_tlsdesc_got2_offset */
811 0, /* plt_tlsdesc_got1_insn_end */
812 0, /* plt_tlsdesc_got2_insn_end */
07d6d2b8
AM		 813 2, /* plt0_got1_offset */
814 8, /* plt0_got2_offset */
815 0, /* plt0_got2_insn_end */
816 4+2, /* plt_got_offset */
817 4+1, /* plt_reloc_offset */
818 4+6, /* plt_plt_offset */
819 0, /* plt_got_insn_size */
820 0, /* plt_plt_insn_end */
821 0, /* plt_lazy_offset */
822 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
823 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
824 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
ee2fdd6f
L		 825 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
826 };
827
765e526c 828static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
ee2fdd6f 829 {
07d6d2b8 830 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
ee2fdd6f 831 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
07d6d2b8
AM		 832 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
833 4+2, /* plt_got_offset */
834 0, /* plt_got_insn_size */
835 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
ee2fdd6f
L		 836 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
837 };
25e762b9
RM		 838\f
839
eac338cf
PB		 840/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
841 for the PLTResolve stub and then for each PLT entry. */
842#define PLTRESOLVE_RELOCS_SHLIB 0
843#define PLTRESOLVE_RELOCS 2
844#define PLT_NON_JUMP_SLOT_RELOCS 2
845
23209a78 846/* These are the standard parameters. */
851b6fa1 847static const struct elf_x86_backend_data elf_i386_arch_bed =
23209a78 848 {
07d6d2b8 849 is_normal /* os */
23209a78
RM		 850 };
851
852#define elf_backend_arch_data &elf_i386_arch_bed
853
142411ca
L		 854/* Return TRUE if the TLS access code sequence support transition
855 from R_TYPE. */
856
857static bfd_boolean
bedfd056 858elf_i386_check_tls_transition (asection *sec,
142411ca
L		 859 bfd_byte *contents,
860 Elf_Internal_Shdr *symtab_hdr,
861 struct elf_link_hash_entry **sym_hashes,
862 unsigned int r_type,
863 const Elf_Internal_Rela *rel,
864 const Elf_Internal_Rela *relend)
13ae64f3 865{
6eaa7fb5 866 unsigned int val, type, reg;
142411ca
L		 867 unsigned long r_symndx;
868 struct elf_link_hash_entry *h;
869 bfd_vma offset;
6eaa7fb5 870 bfd_byte *call;
1d4af308 871 bfd_boolean indirect_call;
142411ca 872
142411ca 873 offset = rel->r_offset;
13ae64f3 874 switch (r_type)
142411ca
L		 875 {
876 case R_386_TLS_GD:
877 case R_386_TLS_LDM:
878 if (offset < 2 || (rel + 1) >= relend)
879 return FALSE;
880
6eaa7fb5
L		 881 indirect_call = FALSE;
882 call = contents + offset + 4;
883 val = *(call - 5);
884 type = *(call - 6);
142411ca
L		 885 if (r_type == R_386_TLS_GD)
886 {
09e8c3bf 887 /* Check transition from GD access model. Only
6eaa7fb5
L		 888 leal foo@tlsgd(,%ebx,1), %eax
889 call ___tls_get_addr@PLT
890 or
891 leal foo@tlsgd(%ebx) %eax
892 call ___tls_get_addr@PLT
893 nop
894 or
895 leal foo@tlsgd(%reg), %eax
896 call *___tls_get_addr@GOT(%reg)
897 which may be converted to
898 addr32 call ___tls_get_addr
142411ca 899 can transit to different access model. */
6eaa7fb5
L		 900 if ((offset + 10) > sec->size
901 || (type != 0x8d && type != 0x04))
142411ca
L		 902 return FALSE;
903
142411ca
L		 904 if (type == 0x04)
905 {
6eaa7fb5
L		 906 /* leal foo@tlsgd(,%ebx,1), %eax
907 call ___tls_get_addr@PLT */
142411ca
L		 908 if (offset < 3)
909 return FALSE;
910
6eaa7fb5
L		 911 if (*(call - 7) != 0x8d
912 || val != 0x1d
913 || call[0] != 0xe8)
142411ca
L		 914 return FALSE;
915 }
916 else
917 {
6eaa7fb5
L		 918 /* This must be
919 leal foo@tlsgd(%ebx), %eax
920 call ___tls_get_addr@PLT
921 nop
922 or
923 leal foo@tlsgd(%reg), %eax
924 call *___tls_get_addr@GOT(%reg)
925 which may be converted to
926 addr32 call ___tls_get_addr
927
928 %eax can't be used as the GOT base register since it
929 is used to pass parameter to ___tls_get_addr. */
930 reg = val & 7;
931 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca
L		 932 return FALSE;
933
6eaa7fb5
L		 934 indirect_call = call[0] == 0xff;
935 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
936 && !(call[0] == 0x67 && call[1] == 0xe8)
937 && !(indirect_call
938 && (call[1] & 0xf8) == 0x90
939 && (call[1] & 0x7) == reg))
142411ca
L		 940 return FALSE;
941 }
942 }
943 else
944 {
945 /* Check transition from LD access model. Only
6eaa7fb5
L		 946 leal foo@tlsldm(%ebx), %eax
947 call ___tls_get_addr@PLT
948 or
949 leal foo@tlsldm(%reg), %eax
950 call *___tls_get_addr@GOT(%reg)
951 which may be converted to
952 addr32 call ___tls_get_addr
142411ca
L		 953 can transit to different access model. */
954 if (type != 0x8d || (offset + 9) > sec->size)
955 return FALSE;
956
6eaa7fb5
L		 957 /* %eax can't be used as the GOT base register since it is
958 used to pass parameter to ___tls_get_addr. */
959 reg = val & 7;
960 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca 961 return FALSE;
142411ca 962
6eaa7fb5
L		 963 indirect_call = call[0] == 0xff;
964 if (!(reg == 3 && call[0] == 0xe8)
965 && !(call[0] == 0x67 && call[1] == 0xe8)
966 && !(indirect_call
967 && (call[1] & 0xf8) == 0x90
968 && (call[1] & 0x7) == reg))
969 return FALSE;
970 }
142411ca
L		 971
972 r_symndx = ELF32_R_SYM (rel[1].r_info);
973 if (r_symndx < symtab_hdr->sh_info)
974 return FALSE;
975
976 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1d4af308 977 if (h == NULL
0afcef53 978 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
6eaa7fb5
L		 979 return FALSE;
980 else if (indirect_call)
981 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
982 else
983 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
984 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
142411ca
L		 985
986 case R_386_TLS_IE:
987 /* Check transition from IE access model:
988 movl foo@indntpoff(%rip), %eax
989 movl foo@indntpoff(%rip), %reg
990 addl foo@indntpoff(%rip), %reg
991 */
992
993 if (offset < 1 || (offset + 4) > sec->size)
994 return FALSE;
995
996 /* Check "movl foo@tpoff(%rip), %eax" first. */
997 val = bfd_get_8 (abfd, contents + offset - 1);
998 if (val == 0xa1)
999 return TRUE;
1000
1001 if (offset < 2)
1002 return FALSE;
1003
1004 /* Check movl|addl foo@tpoff(%rip), %reg. */
1005 type = bfd_get_8 (abfd, contents + offset - 2);
1006 return ((type == 0x8b || type == 0x03)
1007 && (val & 0xc7) == 0x05);
1008
1009 case R_386_TLS_GOTIE:
1010 case R_386_TLS_IE_32:
1011 /* Check transition from {IE_32,GOTIE} access model:
1012 subl foo@{tpoff,gontoff}(%reg1), %reg2
1013 movl foo@{tpoff,gontoff}(%reg1), %reg2
1014 addl foo@{tpoff,gontoff}(%reg1), %reg2
1015 */
1016
1017 if (offset < 2 || (offset + 4) > sec->size)
1018 return FALSE;
1019
1020 val = bfd_get_8 (abfd, contents + offset - 1);
1021 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1022 return FALSE;
1023
1024 type = bfd_get_8 (abfd, contents + offset - 2);
1025 return type == 0x8b || type == 0x2b || type == 0x03;
1026
1027 case R_386_TLS_GOTDESC:
1028 /* Check transition from GDesc access model:
1029 leal x@tlsdesc(%ebx), %eax
1030
1031 Make sure it's a leal adding ebx to a 32-bit offset
1032 into any register, although it's probably almost always
1033 going to be eax. */
1034
1035 if (offset < 2 || (offset + 4) > sec->size)
1036 return FALSE;
1037
1038 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1039 return FALSE;
1040
1041 val = bfd_get_8 (abfd, contents + offset - 1);
1042 return (val & 0xc7) == 0x83;
1043
1044 case R_386_TLS_DESC_CALL:
1045 /* Check transition from GDesc access model:
6eaa7fb5 1046 call *x@tlsdesc(%eax)
142411ca
L		 1047 */
1048 if (offset + 2 <= sec->size)
1049 {
6eaa7fb5
L		 1050 /* Make sure that it's a call *x@tlsdesc(%eax). */
1051 call = contents + offset;
1052 return call[0] == 0xff && call[1] == 0x10;
142411ca
L		 1053 }
1054
1055 return FALSE;
1056
1057 default:
1058 abort ();
1059 }
1060}
1061
1062/* Return TRUE if the TLS access transition is OK or no transition
1063 will be performed. Update R_TYPE if there is a transition. */
1064
1065static bfd_boolean
1066elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1067 asection *sec, bfd_byte *contents,
1068 Elf_Internal_Shdr *symtab_hdr,
1069 struct elf_link_hash_entry **sym_hashes,
1070 unsigned int *r_type, int tls_type,
1071 const Elf_Internal_Rela *rel,
1072 const Elf_Internal_Rela *relend,
4c544807 1073 struct elf_link_hash_entry *h,
bedfd056
L		 1074 unsigned long r_symndx,
1075 bfd_boolean from_relocate_section)
142411ca
L		 1076{
1077 unsigned int from_type = *r_type;
1078 unsigned int to_type = from_type;
1079 bfd_boolean check = TRUE;
1080
bb1cb422
L		 1081 /* Skip TLS transition for functions. */
1082 if (h != NULL
1083 && (h->type == STT_FUNC
1084 || h->type == STT_GNU_IFUNC))
1085 return TRUE;
1086
142411ca 1087 switch (from_type)
13ae64f3
JJ		 1088 {
1089 case R_386_TLS_GD:
67a4f2b7
AO		 1090 case R_386_TLS_GOTDESC:
1091 case R_386_TLS_DESC_CALL:
13ae64f3 1092 case R_386_TLS_IE_32:
37e55690
JJ		 1093 case R_386_TLS_IE:
1094 case R_386_TLS_GOTIE:
0e1862bb 1095 if (bfd_link_executable (info))
142411ca
L		 1096 {
1097 if (h == NULL)
1098 to_type = R_386_TLS_LE_32;
1099 else if (from_type != R_386_TLS_IE
1100 && from_type != R_386_TLS_GOTIE)
1101 to_type = R_386_TLS_IE_32;
1102 }
1103
bedfd056
L		 1104 /* When we are called from elf_i386_relocate_section, there may
1105 be additional transitions based on TLS_TYPE. */
1106 if (from_relocate_section)
142411ca
L		 1107 {
1108 unsigned int new_to_type = to_type;
1109
51537393 1110 if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type))
142411ca
L		 1111 new_to_type = R_386_TLS_LE_32;
1112
1113 if (to_type == R_386_TLS_GD
1114 || to_type == R_386_TLS_GOTDESC
1115 || to_type == R_386_TLS_DESC_CALL)
1116 {
1117 if (tls_type == GOT_TLS_IE_POS)
1118 new_to_type = R_386_TLS_GOTIE;
1119 else if (tls_type & GOT_TLS_IE)
1120 new_to_type = R_386_TLS_IE_32;
1121 }
1122
1123 /* We checked the transition before when we were called from
1124 elf_i386_check_relocs. We only want to check the new
1125 transition which hasn't been checked before. */
1126 check = new_to_type != to_type && from_type == to_type;
1127 to_type = new_to_type;
1128 }
1129
1130 break;
1131
13ae64f3 1132 case R_386_TLS_LDM:
0e1862bb 1133 if (bfd_link_executable (info))
142411ca
L		 1134 to_type = R_386_TLS_LE_32;
1135 break;
1136
1137 default:
1138 return TRUE;
1139 }
1140
1141 /* Return TRUE if there is no transition. */
1142 if (from_type == to_type)
1143 return TRUE;
1144
1145 /* Check if the transition can be performed. */
1146 if (check
bedfd056 1147 && ! elf_i386_check_tls_transition (sec, contents,
142411ca
L		 1148 symtab_hdr, sym_hashes,
1149 from_type, rel, relend))
1150 {
2f629d23 1151 reloc_howto_type *from, *to;
4c544807 1152 const char *name;
142411ca 1153
b366503e
L		 1154 from = elf_i386_rtype_to_howto (from_type);
1155 to = elf_i386_rtype_to_howto (to_type);
142411ca 1156
4c544807
L		 1157 if (h)
1158 name = h->root.root.string;
1159 else
1160 {
0afcef53 1161 struct elf_x86_link_hash_table *htab;
4dfe6ac6 1162
0afcef53 1163 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 1164 if (htab == NULL)
1165 name = "*unknown*";
1166 else
1167 {
1168 Elf_Internal_Sym *isym;
1169
1170 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1171 abfd, r_symndx);
1172 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1173 }
4c544807
L		 1174 }
1175
4eca0228 1176 _bfd_error_handler
695344c0 1177 /* xgettext:c-format */
2dcf00ce
AM		 1178 (_("%pB: TLS transition from %s to %s against `%s'"
1179 " at %#" PRIx64 " in section `%pA' failed"),
c08bb8dd 1180 abfd, from->name, to->name, name,
2dcf00ce 1181 (uint64_t) rel->r_offset, sec);
142411ca
L		 1182 bfd_set_error (bfd_error_bad_value);
1183 return FALSE;
13ae64f3
JJ		 1184 }
1185
142411ca
L		 1186 *r_type = to_type;
1187 return TRUE;
13ae64f3
JJ		 1188}
1189
c175a657
L		 1190/* With the local symbol, foo, we convert
1191 mov foo@GOT[(%reg1)], %reg2
1192 to
1193 lea foo[@GOTOFF(%reg1)], %reg2
1194 and convert
1195 call/jmp *foo@GOT[(%reg)]
1196 to
1197 nop call foo/jmp foo nop
1198 When PIC is false, convert
1199 test %reg1, foo@GOT[(%reg2)]
1200 to
1201 test $foo, %reg1
1202 and convert
1203 binop foo@GOT[(%reg1)], %reg2
1204 to
1205 binop $foo, %reg2
1206 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1207 instructions. */
1208
1209static
1210bfd_boolean
1211elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1212 bfd_byte *contents,
6999821f 1213 unsigned int *r_type_p,
c175a657
L		 1214 Elf_Internal_Rela *irel,
1215 struct elf_link_hash_entry *h,
5e5e02ae 1216 bfd_boolean *converted,
c175a657
L		 1217 struct bfd_link_info *link_info)
1218{
0afcef53 1219 struct elf_x86_link_hash_table *htab;
c175a657
L		 1220 unsigned int opcode;
1221 unsigned int modrm;
1222 bfd_boolean baseless;
1223 Elf_Internal_Sym *isym;
1224 unsigned int addend;
1225 unsigned int nop;
1226 bfd_vma nop_offset;
1227 bfd_boolean is_pic;
1228 bfd_boolean to_reloc_32;
1229 unsigned int r_type;
1230 unsigned int r_symndx;
1231 bfd_vma roff = irel->r_offset;
0a27fed7
L		 1232 bfd_boolean local_ref;
1233 struct elf_x86_link_hash_entry *eh;
c175a657
L		 1234
1235 if (roff < 2)
1236 return TRUE;
1237
7d4d9709 1238 /* Addend for R_386_GOT32X relocations must be 0. */
c175a657
L		 1239 addend = bfd_get_32 (abfd, contents + roff);
1240 if (addend != 0)
1241 return TRUE;
1242
0afcef53 1243 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
c175a657
L		 1244 is_pic = bfd_link_pic (link_info);
1245
6999821f 1246 r_type = *r_type_p;
c175a657
L		 1247 r_symndx = ELF32_R_SYM (irel->r_info);
1248
1249 modrm = bfd_get_8 (abfd, contents + roff - 1);
1250 baseless = (modrm & 0xc7) == 0x5;
1251
7d4d9709 1252 if (baseless && is_pic)
c175a657
L		 1253 {
1254 /* For PIC, disallow R_386_GOT32X without a base register
7d4d9709 1255 since we don't know what the GOT base is. */
c175a657
L		 1256 const char *name;
1257
1258 if (h == NULL)
1259 {
1260 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1261 r_symndx);
1262 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1263 }
1264 else
1265 name = h->root.root.string;
1266
4eca0228 1267 _bfd_error_handler
695344c0 1268 /* xgettext:c-format */
871b3ab2 1269 (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
63a5468a 1270 " register can not be used when making a shared object"),
c175a657
L		 1271 abfd, name);
1272 return FALSE;
1273 }
1274
1275 opcode = bfd_get_8 (abfd, contents + roff - 2);
1276
c175a657
L		 1277 /* Convert to R_386_32 if PIC is false or there is no base
1278 register. */
1279 to_reloc_32 = !is_pic || baseless;
1280
0a27fed7
L		 1281 eh = elf_x86_hash_entry (h);
1282
7d4d9709
L		 1283 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1284 reloc. */
c175a657
L		 1285 if (h == NULL)
1286 {
1287 if (opcode == 0x0ff)
1288 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1289 goto convert_branch;
1290 else
1291 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1292 "test %reg1, foo@GOT(%reg2)" and
1293 "binop foo@GOT[(%reg1)], %reg2". */
1294 goto convert_load;
1295 }
1296
0a27fed7
L		 1297 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1298 local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
1299
c175a657
L		 1300 /* Undefined weak symbol is only bound locally in executable
1301 and its reference is resolved as 0. */
0a27fed7
L		 1302 if (h->root.type == bfd_link_hash_undefweak
1303 && !eh->linker_def
1304 && local_ref)
c175a657
L		 1305 {
1306 if (opcode == 0xff)
1307 {
1308 /* No direct branch to 0 for PIC. */
1309 if (is_pic)
1310 return TRUE;
1311 else
1312 goto convert_branch;
1313 }
1314 else
1315 {
1316 /* We can convert load of address 0 to R_386_32. */
1317 to_reloc_32 = TRUE;
1318 goto convert_load;
1319 }
1320 }
1321
1322 if (opcode == 0xff)
1323 {
1324 /* We have "call/jmp *foo@GOT[(%reg)]". */
1325 if ((h->root.type == bfd_link_hash_defined
1326 || h->root.type == bfd_link_hash_defweak)
0a27fed7 1327 && local_ref)
c175a657
L		 1328 {
1329 /* The function is locally defined. */
1330convert_branch:
1331 /* Convert R_386_GOT32X to R_386_PC32. */
1332 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1333 {
1334 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1335 is a nop prefix. */
1336 modrm = 0xe8;
6eaa7fb5
L		 1337 /* To support TLS optimization, always use addr32 prefix
1338 for "call *___tls_get_addr@GOT(%reg)". */
1d4af308 1339 if (eh && eh->tls_get_addr)
c175a657 1340 {
6eaa7fb5
L		 1341 nop = 0x67;
1342 nop_offset = irel->r_offset - 2;
c175a657
L		 1343 }
1344 else
6eaa7fb5 1345 {
5b9c07b2
L		 1346 nop = htab->params->call_nop_byte;
1347 if (htab->params->call_nop_as_suffix)
6eaa7fb5
L		 1348 {
1349 nop_offset = roff + 3;
1350 irel->r_offset -= 1;
1351 }
1352 else
1353 nop_offset = roff - 2;
1354 }
c175a657
L		 1355 }
1356 else
1357 {
1358 /* Convert to "jmp foo nop". */
1359 modrm = 0xe9;
1360 nop = NOP_OPCODE;
1361 nop_offset = roff + 3;
1362 irel->r_offset -= 1;
1363 }
1364
1365 bfd_put_8 (abfd, nop, contents + nop_offset);
1366 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1367 /* When converting to PC-relative relocation, we
1368 need to adjust addend by -4. */
1369 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1370 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
6999821f 1371 *r_type_p = R_386_PC32;
5e5e02ae 1372 *converted = TRUE;
c175a657
L		 1373 }
1374 }
1375 else
1376 {
1377 /* We have "mov foo@GOT[(%re1g)], %reg2",
1378 "test %reg1, foo@GOT(%reg2)" and
1379 "binop foo@GOT[(%reg1)], %reg2".
1380
1381 Avoid optimizing _DYNAMIC since ld.so may use its
1382 link-time address. */
1383 if (h == htab->elf.hdynamic)
1384 return TRUE;
1385
1386 /* def_regular is set by an assignment in a linker script in
cbd0eecf
L		 1387 bfd_elf_record_link_assignment. start_stop is set on
1388 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1389 if (h->start_stop
0a27fed7 1390 || eh->linker_def
cbd0eecf
L		 1391 || ((h->def_regular
1392 || h->root.type == bfd_link_hash_defined
1393 || h->root.type == bfd_link_hash_defweak)
0a27fed7 1394 && local_ref))
c175a657
L		 1395 {
1396convert_load:
1397 if (opcode == 0x8b)
1398 {
1399 if (to_reloc_32)
1400 {
1401 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1402 "mov $foo, %reg2" with R_386_32. */
1403 r_type = R_386_32;
1404 modrm = 0xc0 | (modrm & 0x38) >> 3;
1405 bfd_put_8 (abfd, modrm, contents + roff - 1);
1406 opcode = 0xc7;
1407 }
1408 else
1409 {
1410 /* Convert "mov foo@GOT(%reg1), %reg2" to
1411 "lea foo@GOTOFF(%reg1), %reg2". */
1412 r_type = R_386_GOTOFF;
1413 opcode = 0x8d;
1414 }
1415 }
1416 else
1417 {
1418 /* Only R_386_32 is supported. */
1419 if (!to_reloc_32)
1420 return TRUE;
1421
1422 if (opcode == 0x85)
1423 {
1424 /* Convert "test %reg1, foo@GOT(%reg2)" to
1425 "test $foo, %reg1". */
1426 modrm = 0xc0 | (modrm & 0x38) >> 3;
1427 opcode = 0xf7;
1428 }
1429 else
1430 {
1431 /* Convert "binop foo@GOT(%reg1), %reg2" to
1432 "binop $foo, %reg2". */
1433 modrm = (0xc0
1434 | (modrm & 0x38) >> 3
1435 | (opcode & 0x3c));
1436 opcode = 0x81;
1437 }
1438 bfd_put_8 (abfd, modrm, contents + roff - 1);
1439 r_type = R_386_32;
1440 }
1441
1442 bfd_put_8 (abfd, opcode, contents + roff - 2);
1443 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
6999821f 1444 *r_type_p = r_type;
5e5e02ae 1445 *converted = TRUE;
c175a657
L		 1446 }
1447 }
1448
1449 return TRUE;
1450}
1451
c1d11331
L		 1452/* Rename some of the generic section flags to better document how they
1453 are used here. */
6999821f 1454#define check_relocs_failed sec_flg0
c1d11331 1455
252b5132 1456/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1457 calculate needed space in the global offset table, procedure linkage
1458 table, and dynamic reloc sections. */
252b5132 1459
b34976b6 1460static bfd_boolean
55fd94b0
AM		 1461elf_i386_check_relocs (bfd *abfd,
1462 struct bfd_link_info *info,
1463 asection *sec,
1464 const Elf_Internal_Rela *relocs)
252b5132 1465{
0afcef53 1466 struct elf_x86_link_hash_table *htab;
252b5132
RH		 1467 Elf_Internal_Shdr *symtab_hdr;
1468 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1469 const Elf_Internal_Rela *rel;
1470 const Elf_Internal_Rela *rel_end;
252b5132 1471 asection *sreloc;
bedfd056 1472 bfd_byte *contents;
5e5e02ae 1473 bfd_boolean converted;
252b5132 1474
0e1862bb 1475 if (bfd_link_relocatable (info))
b34976b6 1476 return TRUE;
252b5132 1477
081b1afe
L		 1478 /* Don't do anything special with non-loaded, non-alloced sections.
1479 In particular, any relocs in such sections should not affect GOT
1480 and PLT reference counting (ie. we don't allow them to create GOT
1481 or PLT entries), there's no possibility or desire to optimize TLS
1482 relocs, and there's not much point in propagating relocs to shared
1483 libs that the dynamic linker won't relocate. */
1484 if ((sec->flags & SEC_ALLOC) == 0)
1485 return TRUE;
1486
0afcef53 1487 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6 1488 if (htab == NULL)
c337a162
L		 1489 {
1490 sec->check_relocs_failed = 1;
1491 return FALSE;
1492 }
4dfe6ac6 1493
fe53b4a4
L		 1494 BFD_ASSERT (is_x86_elf (abfd, htab));
1495
bedfd056
L		 1496 /* Get the section contents. */
1497 if (elf_section_data (sec)->this_hdr.contents != NULL)
1498 contents = elf_section_data (sec)->this_hdr.contents;
1499 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1500 {
1501 sec->check_relocs_failed = 1;
1502 return FALSE;
1503 }
1504
0ffa91dd 1505 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1506 sym_hashes = elf_sym_hashes (abfd);
252b5132 1507
5e5e02ae
L		 1508 converted = FALSE;
1509
252b5132
RH		 1510 sreloc = NULL;
1511
1512 rel_end = relocs + sec->reloc_count;
1513 for (rel = relocs; rel < rel_end; rel++)
1514 {
13ae64f3 1515 unsigned int r_type;
d42c267e 1516 unsigned int r_symndx;
252b5132 1517 struct elf_link_hash_entry *h;
0afcef53 1518 struct elf_x86_link_hash_entry *eh;
4c544807
L		 1519 Elf_Internal_Sym *isym;
1520 const char *name;
06a6a421 1521 bfd_boolean size_reloc;
252b5132
RH		 1522
1523 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1524 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1525
d9bc7a44 1526 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1527 {
695344c0 1528 /* xgettext:c-format */
871b3ab2 1529 _bfd_error_handler (_("%pB: bad symbol index: %d"),
4eca0228 1530 abfd, r_symndx);
c337a162 1531 goto error_return;
f5f31454
L		 1532 }
1533
252b5132 1534 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1535 {
1536 /* A local symbol. */
c2e61a4e
L		 1537 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1538 abfd, r_symndx);
1539 if (isym == NULL)
c337a162 1540 goto error_return;
c25bc9fc
L		 1541
1542 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1543 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1544 {
0afcef53 1545 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1546 if (h == NULL)
c337a162 1547 goto error_return;
6bbec505 1548
c25bc9fc 1549 /* Fake a STT_GNU_IFUNC symbol. */
6322e5c5
L		 1550 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1551 isym, NULL);
c25bc9fc
L		 1552 h->type = STT_GNU_IFUNC;
1553 h->def_regular = 1;
1554 h->ref_regular = 1;
1555 h->forced_local = 1;
1556 h->root.type = bfd_link_hash_defined;
1557 }
1558 else
1559 h = NULL;
1560 }
252b5132 1561 else
71cb9464 1562 {
4c544807 1563 isym = NULL;
71cb9464
L		 1564 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1565 while (h->root.type == bfd_link_hash_indirect
1566 || h->root.type == bfd_link_hash_warning)
1567 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1568 }
cbe950e9 1569
0afcef53 1570 eh = (struct elf_x86_link_hash_entry *) h;
c25bc9fc
L		 1571 if (h != NULL)
1572 {
f604c2a2
L		 1573 if (r_type == R_386_GOTOFF)
1574 eh->gotoff_ref = 1;
cbe950e9 1575
ad1e85de
L		 1576 /* It is referenced by a non-shared object. */
1577 h->ref_regular = 1;
71cb9464 1578 }
252b5132 1579
6999821f
L		 1580 if (r_type == R_386_GOT32X
1581 && (h == NULL || h->type != STT_GNU_IFUNC))
1582 {
1583 Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
1584 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
5e5e02ae
L		 1585 &r_type, irel, h,
1586 &converted, info))
6999821f
L		 1587 goto error_return;
1588 }
1589
bedfd056 1590 if (! elf_i386_tls_transition (info, abfd, sec, contents,
142411ca
L		 1591 symtab_hdr, sym_hashes,
1592 &r_type, GOT_UNKNOWN,
bedfd056 1593 rel, rel_end, h, r_symndx, FALSE))
c337a162 1594 goto error_return;
13ae64f3 1595
cd048363
L		 1596 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1597 if (h == htab->elf.hgot)
1598 htab->got_referenced = TRUE;
1599
13ae64f3 1600 switch (r_type)
252b5132 1601 {
37e55690 1602 case R_386_TLS_LDM:
0f09b4d8 1603 htab->tls_ld_or_ldm_got.refcount = 1;
37e55690
JJ		 1604 goto create_got;
1605
1606 case R_386_PLT32:
1607 /* This symbol requires a procedure linkage table entry. We
1608 actually build the entry in adjust_dynamic_symbol,
1609 because this might be a case of linking PIC code which is
1610 never referenced by a dynamic object, in which case we
1611 don't need to generate a procedure linkage table entry
1612 after all. */
1613
1614 /* If this is a local symbol, we resolve it directly without
1615 creating a procedure linkage table entry. */
1616 if (h == NULL)
1617 continue;
1618
98b273dc 1619 eh->zero_undefweak &= 0x2;
f5385ebf 1620 h->needs_plt = 1;
79b0c981 1621 h->plt.refcount = 1;
37e55690
JJ		 1622 break;
1623
6a3e1bae 1624 case R_386_SIZE32:
06a6a421 1625 size_reloc = TRUE;
6a3e1bae
L		 1626 goto do_size;
1627
13ae64f3 1628 case R_386_TLS_IE_32:
37e55690
JJ		 1629 case R_386_TLS_IE:
1630 case R_386_TLS_GOTIE:
0e1862bb 1631 if (!bfd_link_executable (info))
13ae64f3 1632 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1633 /* Fall through */
1634
252b5132 1635 case R_386_GOT32:
02a86693 1636 case R_386_GOT32X:
13ae64f3 1637 case R_386_TLS_GD:
67a4f2b7
AO		 1638 case R_386_TLS_GOTDESC:
1639 case R_386_TLS_DESC_CALL:
252b5132 1640 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1641 {
1642 int tls_type, old_tls_type;
1643
1644 switch (r_type)
1645 {
1646 default:
02a86693
L		 1647 case R_386_GOT32:
1648 case R_386_GOT32X:
1649 tls_type = GOT_NORMAL;
1650 break;
13ae64f3 1651 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1652 case R_386_TLS_GOTDESC:
1653 case R_386_TLS_DESC_CALL:
1654 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1655 case R_386_TLS_IE_32:
1656 if (ELF32_R_TYPE (rel->r_info) == r_type)
1657 tls_type = GOT_TLS_IE_NEG;
1658 else
ebcfb3c0
JJ		 1659 /* If this is a GD->IE transition, we may use either of
1660 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1661 tls_type = GOT_TLS_IE;
1662 break;
1663 case R_386_TLS_IE:
1664 case R_386_TLS_GOTIE:
1665 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1666 }
1667
1668 if (h != NULL)
1669 {
0f09b4d8 1670 h->got.refcount = 1;
0afcef53 1671 old_tls_type = elf_x86_hash_entry (h)->tls_type;
13ae64f3
JJ		 1672 }
1673 else
1674 {
1675 bfd_signed_vma *local_got_refcounts;
1676
1677 /* This is a global offset table entry for a local symbol. */
1678 local_got_refcounts = elf_local_got_refcounts (abfd);
1679 if (local_got_refcounts == NULL)
1680 {
1681 bfd_size_type size;
1682
1683 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1684 size *= (sizeof (bfd_signed_vma)
1685 + sizeof (bfd_vma) + sizeof(char));
a50b1753 1686 local_got_refcounts = (bfd_signed_vma *)
07d6d2b8 1687 bfd_zalloc (abfd, size);
13ae64f3 1688 if (local_got_refcounts == NULL)
c337a162 1689 goto error_return;
13ae64f3 1690 elf_local_got_refcounts (abfd) = local_got_refcounts;
0afcef53 1691 elf_x86_local_tlsdesc_gotent (abfd)
67a4f2b7 1692 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
0afcef53 1693 elf_x86_local_got_tls_type (abfd)
67a4f2b7 1694 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3 1695 }
0f09b4d8 1696 local_got_refcounts[r_symndx] = 1;
0afcef53 1697 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
13ae64f3
JJ		 1698 }
1699
37e55690
JJ		 1700 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1701 tls_type |= old_tls_type;
13ae64f3
JJ		 1702 /* If a TLS symbol is accessed using IE at least once,
1703 there is no point to use dynamic model for it. */
ebcfb3c0 1704 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1705 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1706 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1707 {
67a4f2b7 1708 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1709 tls_type = old_tls_type;
67a4f2b7
AO		 1710 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1711 && GOT_TLS_GD_ANY_P (tls_type))
1712 tls_type |= old_tls_type;
13ae64f3
JJ		 1713 else
1714 {
09a24cbf 1715 if (h)
4c544807
L		 1716 name = h->root.root.string;
1717 else
1718 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1719 NULL);
4eca0228 1720 _bfd_error_handler
695344c0 1721 /* xgettext:c-format */
871b3ab2 1722 (_("%pB: `%s' accessed both as normal and "
55fd94b0 1723 "thread local symbol"),
4c544807 1724 abfd, name);
68c4a57e 1725 bfd_set_error (bfd_error_bad_value);
c337a162 1726 goto error_return;
13ae64f3
JJ		 1727 }
1728 }
1729
1730 if (old_tls_type != tls_type)
1731 {
1732 if (h != NULL)
0afcef53 1733 elf_x86_hash_entry (h)->tls_type = tls_type;
13ae64f3 1734 else
0afcef53 1735 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
13ae64f3
JJ		 1736 }
1737 }
0ac8d2ca
AM		 1738 /* Fall through */
1739
1740 case R_386_GOTOFF:
1741 case R_386_GOTPC:
cd048363 1742create_got:
37e55690 1743 if (r_type != R_386_TLS_IE)
aec6b87e
L		 1744 {
1745 if (eh != NULL)
cd048363
L		 1746 {
1747 eh->zero_undefweak &= 0x2;
1748
1749 /* Need GOT to resolve undefined weak symbol to 0. */
1750 if (r_type == R_386_GOTOFF
1751 && h->root.type == bfd_link_hash_undefweak
1752 && bfd_link_executable (info))
1753 htab->got_referenced = TRUE;
1754 }
aec6b87e
L		 1755 break;
1756 }
37e55690 1757 /* Fall through */
252b5132 1758
37e55690
JJ		 1759 case R_386_TLS_LE_32:
1760 case R_386_TLS_LE:
aec6b87e 1761 if (eh != NULL)
98b273dc 1762 eh->zero_undefweak &= 0x2;
0e1862bb 1763 if (bfd_link_executable (info))
37e55690 1764 break;
bffbf940 1765 info->flags |= DF_STATIC_TLS;
aec6b87e 1766 goto do_relocation;
252b5132
RH		 1767
1768 case R_386_32:
1769 case R_386_PC32:
aec6b87e 1770 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
98b273dc 1771 eh->zero_undefweak |= 0x2;
aec6b87e 1772do_relocation:
bf52d7c7
L		 1773 /* We are called after all symbols have been resolved. Only
1774 relocation against STT_GNU_IFUNC symbol must go through
1775 PLT. */
d1ed1c7d
L		 1776 if (h != NULL
1777 && (bfd_link_executable (info)
bf52d7c7 1778 || h->type == STT_GNU_IFUNC))
6725bdbf 1779 {
79b0c981 1780 bfd_boolean func_pointer_ref = FALSE;
233cc9c1 1781
4b627c18
L		 1782 if (r_type == R_386_PC32)
1783 {
1784 /* Since something like ".long foo - ." may be used
1785 as pointer, make sure that PLT is used if foo is
1786 a function defined in a shared library. */
1787 if ((sec->flags & SEC_CODE) == 0)
1788 h->pointer_equality_needed = 1;
74437ea2
L		 1789 else if (h->type == STT_GNU_IFUNC
1790 && bfd_link_pic (info))
1791 {
6322e5c5
L		 1792 _bfd_error_handler
1793 /* xgettext:c-format */
871b3ab2 1794 (_("%pB: unsupported non-PIC call to IFUNC `%s'"),
6322e5c5 1795 abfd, h->root.root.string);
74437ea2
L		 1796 bfd_set_error (bfd_error_bad_value);
1797 goto error_return;
1798 }
4b627c18
L		 1799 }
1800 else
04ebc307
L		 1801 {
1802 h->pointer_equality_needed = 1;
1803 /* R_386_32 can be resolved at run-time. */
1804 if (r_type == R_386_32
1805 && (sec->flags & SEC_READONLY) == 0)
79b0c981
L		 1806 func_pointer_ref = TRUE;
1807 }
1808
1809 if (!func_pointer_ref)
1810 {
1811 /* If this reloc is in a read-only section, we might
1812 need a copy reloc. We can't check reliably at this
1813 stage whether the section is read-only, as input
1814 sections have not yet been mapped to output sections.
1815 Tentatively set the flag for now, and correct in
1816 adjust_dynamic_symbol. */
1817 h->non_got_ref = 1;
1818
1819 /* We may need a .plt entry if the symbol is a function
1820 defined in a shared lib or is a function referenced
1821 from the code or read-only section. */
1822 if (!h->def_regular
1823 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1824 h->plt.refcount = 1;
04ebc307 1825 }
6725bdbf 1826 }
7843f00e 1827
06a6a421 1828 size_reloc = FALSE;
6a3e1bae 1829do_size:
451875b4 1830 if (NEED_DYNAMIC_RELOCATION_P (info, FALSE, h, sec, r_type,
daf1c414 1831 R_386_32))
252b5132 1832 {
e03a8ed8
L		 1833 struct elf_dyn_relocs *p;
1834 struct elf_dyn_relocs **head;
ec338859 1835
12d0ee4a
AM		 1836 /* We must copy these reloc types into the output file.
1837 Create a reloc section in dynobj and make room for
1838 this reloc. */
252b5132
RH		 1839 if (sreloc == NULL)
1840 {
83bac4b0
NC		 1841 sreloc = _bfd_elf_make_dynamic_reloc_section
1842 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1843
252b5132 1844 if (sreloc == NULL)
c337a162 1845 goto error_return;
252b5132
RH		 1846 }
1847
0c715baa
AM		 1848 /* If this is a global symbol, we count the number of
1849 relocations we need for this symbol. */
1850 if (h != NULL)
252b5132 1851 {
d5597ebc 1852 head = &eh->dyn_relocs;
0c715baa
AM		 1853 }
1854 else
1855 {
ec338859
AM		 1856 /* Track dynamic relocs needed for local syms too.
1857 We really need local syms available to do this
1858 easily. Oh well. */
87d72d41 1859 void **vpp;
ec338859 1860 asection *s;
87d72d41
AM		 1861
1862 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1863 abfd, r_symndx);
1864 if (isym == NULL)
c337a162 1865 goto error_return;
87d72d41
AM		 1866
1867 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1868 if (s == NULL)
87d72d41 1869 s = sec;
ec338859 1870
e81d3500 1871 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1872 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 1873 }
1874
1875 p = *head;
1876 if (p == NULL || p->sec != sec)
1877 {
1878 bfd_size_type amt = sizeof *p;
a50b1753 1879 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
07d6d2b8 1880 amt);
ec338859 1881 if (p == NULL)
c337a162 1882 goto error_return;
ec338859
AM		 1883 p->next = *head;
1884 *head = p;
1885 p->sec = sec;
1886 p->count = 0;
1887 p->pc_count = 0;
252b5132 1888 }
ec338859
AM		 1889
1890 p->count += 1;
06a6a421
L		 1891 /* Count size relocation as PC-relative relocation. */
1892 if (r_type == R_386_PC32 || size_reloc)
ec338859 1893 p->pc_count += 1;
252b5132 1894 }
252b5132
RH		 1895 break;
1896
1897 /* This relocation describes the C++ object vtable hierarchy.
1898 Reconstruct it for later use during GC. */
1899 case R_386_GNU_VTINHERIT:
d17e0c6e 1900 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c337a162 1901 goto error_return;
252b5132
RH		 1902 break;
1903
1904 /* This relocation describes which C++ vtable entries are actually
1905 used. Record for later use during GC. */
1906 case R_386_GNU_VTENTRY:
a0ea3a14 1907 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c337a162 1908 goto error_return;
252b5132
RH		 1909 break;
1910
1911 default:
1912 break;
1913 }
1914 }
1915
bedfd056
L		 1916 if (elf_section_data (sec)->this_hdr.contents != contents)
1917 {
5e5e02ae 1918 if (!converted && !info->keep_memory)
bedfd056
L		 1919 free (contents);
1920 else
1921 {
5e5e02ae
L		 1922 /* Cache the section contents for elf_link_input_bfd if any
1923 load is converted or --no-keep-memory isn't used. */
bedfd056
L		 1924 elf_section_data (sec)->this_hdr.contents = contents;
1925 }
1926 }
1927
5e5e02ae
L		 1928 /* Cache relocations if any load is converted. */
1929 if (elf_section_data (sec)->relocs != relocs && converted)
1930 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
1931
b34976b6 1932 return TRUE;
c337a162
L		 1933
1934error_return:
bedfd056
L		 1935 if (elf_section_data (sec)->this_hdr.contents != contents)
1936 free (contents);
c337a162
L		 1937 sec->check_relocs_failed = 1;
1938 return FALSE;
252b5132
RH		 1939}
1940
38701953
AM		 1941/* Set the correct type for an x86 ELF section. We do this by the
1942 section name, which is a hack, but ought to work. */
1943
b34976b6 1944static bfd_boolean
55fd94b0
AM		 1945elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1946 Elf_Internal_Shdr *hdr,
1947 asection *sec)
38701953 1948{
91d6fa6a 1949 const char *name;
38701953 1950
fd361982 1951 name = bfd_section_name (sec);
38701953
AM		 1952
1953 /* This is an ugly, but unfortunately necessary hack that is
1954 needed when producing EFI binaries on x86. It tells
1955 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1956 containing ELF relocation info. We need this hack in order to
1957 be able to generate ELF binaries that can be translated into
1958 EFI applications (which are essentially COFF objects). Those
1959 files contain a COFF ".reloc" section inside an ELFNN object,
1960 which would normally cause BFD to segfault because it would
1961 attempt to interpret this section as containing relocation
1962 entries for section "oc". With this hack enabled, ".reloc"
1963 will be treated as a normal data section, which will avoid the
1964 segfault. However, you won't be able to create an ELFNN binary
1965 with a section named "oc" that needs relocations, but that's
1966 the kind of ugly side-effects you get when detecting section
1967 types based on their names... In practice, this limitation is
1968 unlikely to bite. */
1969 if (strcmp (name, ".reloc") == 0)
1970 hdr->sh_type = SHT_PROGBITS;
1971
b34976b6 1972 return TRUE;
38701953
AM		 1973}
1974
13ae64f3
JJ		 1975/* Return the relocation value for @tpoff relocation
1976 if STT_TLS virtual address is ADDRESS. */
1977
1978static bfd_vma
eb4ff4d6 1979elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 1980{
e1918d23 1981 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 1982 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
1983 bfd_vma static_tls_size;
13ae64f3 1984
e1918d23
AM		 1985 /* If tls_sec is NULL, we should have signalled an error already. */
1986 if (htab->tls_sec == NULL)
6a30718d 1987 return 0;
7dc98aea
RO		 1988
1989 /* Consider special static TLS alignment requirements. */
1990 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
1991 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 1992}
1993
252b5132
RH		 1994/* Relocate an i386 ELF section. */
1995
b34976b6 1996static bfd_boolean
55fd94b0
AM		 1997elf_i386_relocate_section (bfd *output_bfd,
1998 struct bfd_link_info *info,
1999 bfd *input_bfd,
2000 asection *input_section,
2001 bfd_byte *contents,
2002 Elf_Internal_Rela *relocs,
2003 Elf_Internal_Sym *local_syms,
2004 asection **local_sections)
252b5132 2005{
0afcef53 2006 struct elf_x86_link_hash_table *htab;
252b5132
RH		 2007 Elf_Internal_Shdr *symtab_hdr;
2008 struct elf_link_hash_entry **sym_hashes;
2009 bfd_vma *local_got_offsets;
67a4f2b7 2010 bfd_vma *local_tlsdesc_gotents;
252b5132 2011 Elf_Internal_Rela *rel;
60f2e42e 2012 Elf_Internal_Rela *wrel;
252b5132 2013 Elf_Internal_Rela *relend;
3348747a 2014 bfd_boolean is_vxworks_tls;
25e762b9 2015 unsigned plt_entry_size;
252b5132 2016
c337a162
L		 2017 /* Skip if check_relocs failed. */
2018 if (input_section->check_relocs_failed)
2019 return FALSE;
2020
0afcef53 2021 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2022 if (htab == NULL)
2023 return FALSE;
fe53b4a4 2024
7af5d5c4
AM		 2025 if (!is_x86_elf (input_bfd, htab))
2026 {
2027 bfd_set_error (bfd_error_wrong_format);
2028 return FALSE;
2029 }
fe53b4a4 2030
0ffa91dd 2031 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 2032 sym_hashes = elf_sym_hashes (input_bfd);
2033 local_got_offsets = elf_local_got_offsets (input_bfd);
0afcef53 2034 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 2035 /* We have to handle relocations in vxworks .tls_vars sections
2036 specially, because the dynamic loader is 'weird'. */
851b6fa1 2037 is_vxworks_tls = (htab->target_os == is_vxworks
07d6d2b8 2038 && bfd_link_pic (info)
3348747a
NS		 2039 && !strcmp (input_section->output_section->name,
2040 ".tls_vars"));
252b5132 2041
0afcef53 2042 _bfd_x86_elf_set_tls_module_base (info);
9f03412a 2043
765e526c 2044 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 2045
60f2e42e 2046 rel = wrel = relocs;
252b5132 2047 relend = relocs + input_section->reloc_count;
60f2e42e 2048 for (; rel < relend; wrel++, rel++)
252b5132 2049 {
419414ea 2050 unsigned int r_type, r_type_tls;
252b5132
RH		 2051 reloc_howto_type *howto;
2052 unsigned long r_symndx;
2053 struct elf_link_hash_entry *h;
0afcef53 2054 struct elf_x86_link_hash_entry *eh;
252b5132
RH		 2055 Elf_Internal_Sym *sym;
2056 asection *sec;
dd7e64d4 2057 bfd_vma off, offplt, plt_offset;
252b5132 2058 bfd_vma relocation;
b34976b6 2059 bfd_boolean unresolved_reloc;
252b5132 2060 bfd_reloc_status_type r;
1b452ec6 2061 unsigned int indx;
13ae64f3 2062 int tls_type;
1788fc08 2063 bfd_vma st_size;
dd7e64d4 2064 asection *resolved_plt;
aec6b87e 2065 bfd_boolean resolved_to_zero;
e133d005 2066 bfd_boolean relative_reloc;
252b5132
RH		 2067
2068 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 2069 if (r_type == R_386_GNU_VTINHERIT
2070 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 2071 {
2072 if (wrel != rel)
2073 *wrel = *rel;
2074 continue;
2075 }
dc47f327 2076
b366503e 2077 howto = elf_i386_rtype_to_howto (r_type);
76268e02 2078 if (howto == NULL)
47aeb64c
NC		 2079 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2080
252b5132 2081 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 2082 h = NULL;
2083 sym = NULL;
2084 sec = NULL;
b34976b6 2085 unresolved_reloc = FALSE;
252b5132
RH		 2086 if (r_symndx < symtab_hdr->sh_info)
2087 {
2088 sym = local_syms + r_symndx;
2089 sec = local_sections[r_symndx];
2090 relocation = (sec->output_section->vma
2091 + sec->output_offset
2092 + sym->st_value);
1788fc08 2093 st_size = sym->st_size;
ab96bf03
AM		 2094
2095 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2096 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 2097 || (bfd_link_relocatable (info)
ab96bf03 2098 && sec->output_offset != 0)))
f8df10f4 2099 {
f8df10f4 2100 bfd_vma addend;
4a335f3d 2101 bfd_byte *where = contents + rel->r_offset;
f8df10f4 2102
4a335f3d 2103 switch (howto->size)
f8df10f4 2104 {
4a335f3d
AM		 2105 case 0:
2106 addend = bfd_get_8 (input_bfd, where);
2107 if (howto->pc_relative)
2108 {
2109 addend = (addend ^ 0x80) - 0x80;
2110 addend += 1;
2111 }
2112 break;
2113 case 1:
2114 addend = bfd_get_16 (input_bfd, where);
2115 if (howto->pc_relative)
2116 {
2117 addend = (addend ^ 0x8000) - 0x8000;
2118 addend += 2;
2119 }
2120 break;
2121 case 2:
2122 addend = bfd_get_32 (input_bfd, where);
2123 if (howto->pc_relative)
2124 {
2125 addend = (addend ^ 0x80000000) - 0x80000000;
2126 addend += 4;
2127 }
2128 break;
2129 default:
2130 abort ();
f8df10f4
JJ		 2131 }
2132
0e1862bb 2133 if (bfd_link_relocatable (info))
ab96bf03
AM		 2134 addend += sec->output_offset;
2135 else
2136 {
2137 asection *msec = sec;
2138 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2139 addend);
2140 addend -= relocation;
2141 addend += msec->output_section->vma + msec->output_offset;
2142 }
4a335f3d
AM		 2143
2144 switch (howto->size)
2145 {
2146 case 0:
16a10388 2147 /* FIXME: overflow checks. */
4a335f3d
AM		 2148 if (howto->pc_relative)
2149 addend -= 1;
2150 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 2151 break;
2152 case 1:
2153 if (howto->pc_relative)
2154 addend -= 2;
2155 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 2156 break;
2157 case 2:
2158 if (howto->pc_relative)
2159 addend -= 4;
2160 bfd_put_32 (input_bfd, addend, where);
2161 break;
2162 }
f8df10f4 2163 }
0e1862bb 2164 else if (!bfd_link_relocatable (info)
1f85278f 2165 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 2166 {
2167 /* Relocate against local STT_GNU_IFUNC symbol. */
0afcef53
L		 2168 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2169 FALSE);
c25bc9fc
L		 2170 if (h == NULL)
2171 abort ();
2172
23209a78 2173 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 2174 h->root.u.def.value = sym->st_value;
2175 h->root.u.def.section = sec;
2176 }
252b5132
RH		 2177 }
2178 else
2179 {
3d540e93 2180 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 2181 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 2182
b2a8e766
AM		 2183 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2184 r_symndx, symtab_hdr, sym_hashes,
2185 h, sec, relocation,
62d887d4 2186 unresolved_reloc, warned, ignored);
1788fc08 2187 st_size = h->size;
252b5132
RH		 2188 }
2189
dbaa2011 2190 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 2191 {
2192 _bfd_clear_contents (howto, input_bfd, input_section,
0930cb30 2193 contents, rel->r_offset);
60f2e42e
L		 2194 wrel->r_offset = rel->r_offset;
2195 wrel->r_info = 0;
2196 wrel->r_addend = 0;
2197
2198 /* For ld -r, remove relocations in debug sections against
2199 sections defined in discarded sections. Not done for
2200 eh_frame editing code expects to be present. */
2201 if (bfd_link_relocatable (info)
2202 && (input_section->flags & SEC_DEBUGGING))
2203 wrel--;
2204
2205 continue;
2206 }
9635fe29 2207
0e1862bb 2208 if (bfd_link_relocatable (info))
2d5da473
L		 2209 {
2210 if (wrel != rel)
2211 *wrel = *rel;
2212 continue;
2213 }
ab96bf03 2214
0afcef53 2215 eh = (struct elf_x86_link_hash_entry *) h;
ee2fdd6f 2216
cbe950e9
L		 2217 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2218 it here if it is defined in a non-shared object. */
2219 if (h != NULL
2220 && h->type == STT_GNU_IFUNC
2221 && h->def_regular)
2222 {
ee2fdd6f 2223 asection *gotplt, *base_got;
cbe950e9 2224 bfd_vma plt_index;
4c544807 2225 const char *name;
cbe950e9 2226
97dc35c8
L		 2227 if ((input_section->flags & SEC_ALLOC) == 0)
2228 {
347a8774
L		 2229 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2230 STT_GNU_IFUNC symbol as STT_FUNC. */
2231 if (elf_section_type (input_section) == SHT_NOTE)
2232 goto skip_ifunc;
97dc35c8
L		 2233 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2234 sections because such sections are not SEC_ALLOC and
2235 thus ld.so will not process them. */
2236 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 2237 continue;
97dc35c8
L		 2238 abort ();
2239 }
cbe950e9
L		 2240
2241 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 2242 if (htab->elf.splt != NULL)
cbe950e9 2243 {
ee2fdd6f
L		 2244 if (htab->plt_second != NULL)
2245 {
2246 resolved_plt = htab->plt_second;
2247 plt_offset = eh->plt_second.offset;
2248 }
2249 else
2250 {
2251 resolved_plt = htab->elf.splt;
2252 plt_offset = h->plt.offset;
2253 }
6de2ae4a 2254 gotplt = htab->elf.sgotplt;
cbe950e9
L		 2255 }
2256 else
2257 {
ee2fdd6f
L		 2258 resolved_plt = htab->elf.iplt;
2259 plt_offset = h->plt.offset;
6de2ae4a 2260 gotplt = htab->elf.igotplt;
cbe950e9
L		 2261 }
2262
cbe950e9
L		 2263 switch (r_type)
2264 {
2265 default:
233cc9c1 2266 break;
cbe950e9
L		 2267
2268 case R_386_GOT32:
02a86693 2269 case R_386_GOT32X:
6de2ae4a 2270 base_got = htab->elf.sgot;
cbe950e9
L		 2271 off = h->got.offset;
2272
7afd84dc 2273 if (base_got == NULL)
cbe950e9
L		 2274 abort ();
2275
7afd84dc 2276 if (off == (bfd_vma) -1)
cbe950e9 2277 {
7afd84dc
L		 2278 /* We can't use h->got.offset here to save state, or
2279 even just remember the offset, as finish_dynamic_symbol
2280 would use that as offset into .got. */
6bbec505 2281
233cc9c1
L		 2282 if (h->plt.offset == (bfd_vma) -1)
2283 abort ();
2284
6de2ae4a 2285 if (htab->elf.splt != NULL)
7afd84dc 2286 {
f604c2a2 2287 plt_index = (h->plt.offset / plt_entry_size
765e526c 2288 - htab->plt.has_plt0);
7afd84dc 2289 off = (plt_index + 3) * 4;
6de2ae4a 2290 base_got = htab->elf.sgotplt;
7afd84dc 2291 }
cbe950e9
L		 2292 else
2293 {
25e762b9 2294 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 2295 off = plt_index * 4;
6de2ae4a 2296 base_got = htab->elf.igotplt;
7afd84dc
L		 2297 }
2298
2299 if (h->dynindx == -1
2300 || h->forced_local
2301 || info->symbolic)
2302 {
2303 /* This references the local defitionion. We must
2304 initialize this entry in the global offset table.
2305 Since the offset must always be a multiple of 8,
2306 we use the least significant bit to record
2307 whether we have initialized it already.
2308
2309 When doing a dynamic link, we create a .rela.got
2310 relocation entry to initialize the value. This
2311 is done in the finish_dynamic_symbol routine. */
2312 if ((off & 1) != 0)
2313 off &= ~1;
2314 else
2315 {
2316 bfd_put_32 (output_bfd, relocation,
2317 base_got->contents + off);
2318 h->got.offset |= 1;
2319 }
cbe950e9 2320 }
cbe950e9 2321
7afd84dc 2322 relocation = off;
7afd84dc
L		 2323 }
2324 else
ca8c86ef
L		 2325 relocation = (base_got->output_section->vma
2326 + base_got->output_offset + off
2327 - gotplt->output_section->vma
2328 - gotplt->output_offset);
2329
2a568401
L		 2330 if (rel->r_offset > 1
2331 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2332 && *(contents + rel->r_offset - 2) != 0x8d)
712ec279
L		 2333 {
2334 if (bfd_link_pic (info))
2335 goto disallow_got32;
2336
2337 /* Add the GOT base if there is no base register. */
2338 relocation += (gotplt->output_section->vma
2339 + gotplt->output_offset);
2340 }
2341 else if (htab->elf.splt == NULL)
2342 {
2343 /* Adjust for static executables. */
2344 relocation += gotplt->output_offset;
2345 }
0018b0a3 2346
cbe950e9 2347 goto do_relocation;
233cc9c1
L		 2348 }
2349
2350 if (h->plt.offset == (bfd_vma) -1)
2351 {
2352 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2353 if (r_type == R_386_32
2354 && (input_section->flags & SEC_CODE) == 0)
2355 goto do_ifunc_pointer;
2356 goto bad_ifunc_reloc;
2357 }
2358
ee2fdd6f
L		 2359 relocation = (resolved_plt->output_section->vma
2360 + resolved_plt->output_offset + plt_offset);
233cc9c1
L		 2361
2362 switch (r_type)
2363 {
2364 default:
2365bad_ifunc_reloc:
2366 if (h->root.root.string)
2367 name = h->root.root.string;
2368 else
2369 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2370 NULL);
4eca0228 2371 _bfd_error_handler
695344c0 2372 /* xgettext:c-format */
871b3ab2 2373 (_("%pB: relocation %s against STT_GNU_IFUNC "
233cc9c1
L		 2374 "symbol `%s' isn't supported"), input_bfd,
2375 howto->name, name);
2376 bfd_set_error (bfd_error_bad_value);
2377 return FALSE;
2378
2379 case R_386_32:
2380 /* Generate dynamic relcoation only when there is a
2381 non-GOT reference in a shared object. */
2382 if ((bfd_link_pic (info) && h->non_got_ref)
2383 || h->plt.offset == (bfd_vma) -1)
2384 {
2385 Elf_Internal_Rela outrel;
2386 asection *sreloc;
2387 bfd_vma offset;
2388
2389do_ifunc_pointer:
2390 /* Need a dynamic relocation to get the real function
2391 adddress. */
2392 offset = _bfd_elf_section_offset (output_bfd,
2393 info,
2394 input_section,
2395 rel->r_offset);
2396 if (offset == (bfd_vma) -1
2397 || offset == (bfd_vma) -2)
2398 abort ();
2399
2400 outrel.r_offset = (input_section->output_section->vma
2401 + input_section->output_offset
2402 + offset);
2403
cf1070f1 2404 if (POINTER_LOCAL_IFUNC_P (info, h))
233cc9c1 2405 {
871b3ab2 2406 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 2407 h->root.root.string,
2408 h->root.u.def.section->owner);
2409
233cc9c1
L		 2410 /* This symbol is resolved locally. */
2411 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2412 bfd_put_32 (output_bfd,
2413 (h->root.u.def.value
2414 + h->root.u.def.section->output_section->vma
2415 + h->root.u.def.section->output_offset),
2416 contents + offset);
2417 }
2418 else
2419 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2420
2421 /* Dynamic relocations are stored in
2422 1. .rel.ifunc section in PIC object.
2423 2. .rel.got section in dynamic executable.
2424 3. .rel.iplt section in static executable. */
2425 if (bfd_link_pic (info))
2426 sreloc = htab->elf.irelifunc;
2427 else if (htab->elf.splt != NULL)
2428 sreloc = htab->elf.srelgot;
2429 else
2430 sreloc = htab->elf.irelplt;
2431 elf_append_rel (output_bfd, sreloc, &outrel);
2432
2433 /* If this reloc is against an external symbol, we
2434 do not want to fiddle with the addend. Otherwise,
2435 we need to include the symbol value so that it
2436 becomes an addend for the dynamic reloc. For an
2437 internal symbol, we have updated addend. */
2438 continue;
2439 }
2440 /* FALLTHROUGH */
2441 case R_386_PC32:
2442 case R_386_PLT32:
2443 goto do_relocation;
cbe950e9
L		 2444
2445 case R_386_GOTOFF:
2446 relocation -= (gotplt->output_section->vma
2447 + gotplt->output_offset);
2448 goto do_relocation;
2449 }
2450 }
2451
347a8774 2452skip_ifunc:
aec6b87e 2453 resolved_to_zero = (eh != NULL
c5bce5c6 2454 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
aec6b87e 2455
252b5132
RH		 2456 switch (r_type)
2457 {
02a86693 2458 case R_386_GOT32X:
252b5132
RH		 2459 case R_386_GOT32:
2460 /* Relocation is to the entry for this symbol in the global
2461 offset table. */
6de2ae4a 2462 if (htab->elf.sgot == NULL)
ffb2e45b 2463 abort ();
252b5132 2464
e133d005 2465 relative_reloc = FALSE;
252b5132
RH		 2466 if (h != NULL)
2467 {
252b5132 2468 off = h->got.offset;
2eba97c2 2469 if (RESOLVED_LOCALLY_P (info, h, htab))
252b5132 2470 {
2eba97c2
L		 2471 /* We must initialize this entry in the global offset
2472 table. Since the offset must always be a multiple
2473 of 4, we use the least significant bit to record
2474 whether we have initialized it already.
252b5132
RH		 2475
2476 When doing a dynamic link, we create a .rel.got
2477 relocation entry to initialize the value. This
2478 is done in the finish_dynamic_symbol routine. */
2479 if ((off & 1) != 0)
2480 off &= ~1;
2481 else
2482 {
2483 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2484 htab->elf.sgot->contents + off);
252b5132 2485 h->got.offset |= 1;
e133d005 2486
f70656b2 2487 if (GENERATE_RELATIVE_RELOC_P (info, h))
e133d005
L		 2488 {
2489 /* PR ld/21402: If this symbol isn't dynamic
0dc9a308 2490 in PIC, generate R_386_RELATIVE here. */
e133d005
L		 2491 eh->no_finish_dynamic_symbol = 1;
2492 relative_reloc = TRUE;
2493 }
252b5132
RH		 2494 }
2495 }
8c694914 2496 else
b34976b6 2497 unresolved_reloc = FALSE;
252b5132
RH		 2498 }
2499 else
2500 {
ffb2e45b
AM		 2501 if (local_got_offsets == NULL)
2502 abort ();
252b5132
RH		 2503
2504 off = local_got_offsets[r_symndx];
2505
2506 /* The offset must always be a multiple of 4. We use
83be169b
AM		 2507 the least significant bit to record whether we have
2508 already generated the necessary reloc. */
252b5132
RH		 2509 if ((off & 1) != 0)
2510 off &= ~1;
2511 else
2512 {
6725bdbf 2513 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2514 htab->elf.sgot->contents + off);
e133d005 2515 local_got_offsets[r_symndx] |= 1;
252b5132 2516
0e1862bb 2517 if (bfd_link_pic (info))
e133d005 2518 relative_reloc = TRUE;
252b5132 2519 }
252b5132
RH		 2520 }
2521
e133d005
L		 2522 if (relative_reloc)
2523 {
2524 asection *s;
2525 Elf_Internal_Rela outrel;
2526
2527 s = htab->elf.srelgot;
2528 if (s == NULL)
2529 abort ();
2530
2531 outrel.r_offset = (htab->elf.sgot->output_section->vma
2532 + htab->elf.sgot->output_offset
2533 + off);
2534 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2535 elf_append_rel (output_bfd, s, &outrel);
2536 }
2537
ffb2e45b
AM		 2538 if (off >= (bfd_vma) -2)
2539 abort ();
2540
74d7f0aa
L		 2541 relocation = (htab->elf.sgot->output_section->vma
2542 + htab->elf.sgot->output_offset + off);
2a568401
L		 2543 if (rel->r_offset > 1
2544 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2545 && *(contents + rel->r_offset - 2) != 0x8d)
74d7f0aa
L		 2546 {
2547 if (bfd_link_pic (info))
2548 {
2549 /* For PIC, disallow R_386_GOT32 without a base
2a568401
L		 2550 register, except for "lea foo@GOT, %reg", since
2551 we don't know what the GOT base is. */
74d7f0aa
L		 2552 const char *name;
2553
712ec279 2554disallow_got32:
a5def14f 2555 if (h == NULL || h->root.root.string == NULL)
74d7f0aa
L		 2556 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2557 NULL);
2558 else
2559 name = h->root.root.string;
2560
4eca0228 2561 _bfd_error_handler
695344c0 2562 /* xgettext:c-format */
871b3ab2 2563 (_("%pB: direct GOT relocation %s against `%s'"
63a5468a
AM		 2564 " without base register can not be used"
2565 " when making a shared object"),
712ec279 2566 input_bfd, howto->name, name);
74d7f0aa
L		 2567 bfd_set_error (bfd_error_bad_value);
2568 return FALSE;
2569 }
2570 }
2571 else
2572 {
2573 /* Subtract the .got.plt section address only with a base
2574 register. */
2575 relocation -= (htab->elf.sgotplt->output_section->vma
2576 + htab->elf.sgotplt->output_offset);
2577 }
2578
252b5132
RH		 2579 break;
2580
2581 case R_386_GOTOFF:
2582 /* Relocation is relative to the start of the global offset
2583 table. */
2584
3d949995
L		 2585 /* Check to make sure it isn't a protected function or data
2586 symbol for shared library since it may not be local when
2587 used as function address or with copy relocation. We also
e3c0e327 2588 need to make sure that a symbol is referenced locally. */
0e1862bb 2589 if (!bfd_link_executable (info) && h)
90f487df 2590 {
41bed6dd
L		 2591 if (!h->def_regular)
2592 {
2593 const char *v;
2594
2595 switch (ELF_ST_VISIBILITY (h->other))
2596 {
2597 case STV_HIDDEN:
2598 v = _("hidden symbol");
2599 break;
2600 case STV_INTERNAL:
2601 v = _("internal symbol");
2602 break;
2603 case STV_PROTECTED:
2604 v = _("protected symbol");
2605 break;
2606 default:
2607 v = _("symbol");
2608 break;
2609 }
2610
4eca0228 2611 _bfd_error_handler
695344c0 2612 /* xgettext:c-format */
871b3ab2 2613 (_("%pB: relocation R_386_GOTOFF against undefined %s"
63a5468a 2614 " `%s' can not be used when making a shared object"),
41bed6dd
L		 2615 input_bfd, v, h->root.root.string);
2616 bfd_set_error (bfd_error_bad_value);
2617 return FALSE;
2618 }
6999821f 2619 else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
3d949995
L		 2620 && (h->type == STT_FUNC
2621 || h->type == STT_OBJECT)
41bed6dd
L		 2622 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2623 {
4eca0228 2624 _bfd_error_handler
695344c0 2625 /* xgettext:c-format */
871b3ab2 2626 (_("%pB: relocation R_386_GOTOFF against protected %s"
63a5468a 2627 " `%s' can not be used when making a shared object"),
3d949995
L		 2628 input_bfd,
2629 h->type == STT_FUNC ? "function" : "data",
2630 h->root.root.string);
41bed6dd
L		 2631 bfd_set_error (bfd_error_bad_value);
2632 return FALSE;
2633 }
90f487df
L		 2634 }
2635
8c37241b
JJ		 2636 /* Note that sgot is not involved in this
2637 calculation. We always want the start of .got.plt. If we
2638 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 2639 permitted by the ABI, we might have to change this
2640 calculation. */
6de2ae4a
L		 2641 relocation -= htab->elf.sgotplt->output_section->vma
2642 + htab->elf.sgotplt->output_offset;
252b5132
RH		 2643 break;
2644
2645 case R_386_GOTPC:
2646 /* Use global offset table as symbol value. */
6de2ae4a
L		 2647 relocation = htab->elf.sgotplt->output_section->vma
2648 + htab->elf.sgotplt->output_offset;
b34976b6 2649 unresolved_reloc = FALSE;
252b5132
RH		 2650 break;
2651
2652 case R_386_PLT32:
2653 /* Relocation is to the entry for this symbol in the
2654 procedure linkage table. */
2655
dd5724d5 2656 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 2657 without using the procedure linkage table. */
252b5132
RH		 2658 if (h == NULL)
2659 break;
2660
dd7e64d4
L		 2661 if ((h->plt.offset == (bfd_vma) -1
2662 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 2663 || htab->elf.splt == NULL)
252b5132
RH		 2664 {
2665 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 2666 happens when statically linking PIC code, or when
2667 using -Bsymbolic. */
252b5132
RH		 2668 break;
2669 }
2670
dd7e64d4
L		 2671 if (h->plt.offset != (bfd_vma) -1)
2672 {
ee2fdd6f
L		 2673 if (htab->plt_second != NULL)
2674 {
2675 resolved_plt = htab->plt_second;
2676 plt_offset = eh->plt_second.offset;
2677 }
2678 else
2679 {
2680 resolved_plt = htab->elf.splt;
2681 plt_offset = h->plt.offset;
2682 }
dd7e64d4
L		 2683 }
2684 else
2685 {
2686 resolved_plt = htab->plt_got;
2687 plt_offset = eh->plt_got.offset;
2688 }
2689
2690 relocation = (resolved_plt->output_section->vma
2691 + resolved_plt->output_offset
2692 + plt_offset);
b34976b6 2693 unresolved_reloc = FALSE;
252b5132
RH		 2694 break;
2695
1788fc08 2696 case R_386_SIZE32:
1788fc08
L		 2697 /* Set to symbol size. */
2698 relocation = st_size;
2699 /* Fall through. */
2700
252b5132
RH		 2701 case R_386_32:
2702 case R_386_PC32:
3348747a
NS		 2703 if ((input_section->flags & SEC_ALLOC) == 0
2704 || is_vxworks_tls)
ec338859
AM		 2705 break;
2706
aebcc8ff
L		 2707 if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type,
2708 FALSE, resolved_to_zero,
2709 (r_type == R_386_PC32)))
252b5132 2710 {
947216bf 2711 Elf_Internal_Rela outrel;
b34976b6 2712 bfd_boolean skip, relocate;
0c715baa 2713 asection *sreloc;
252b5132
RH		 2714
2715 /* When generating a shared object, these relocations
2716 are copied into the output file to be resolved at run
2717 time. */
2718
b34976b6
AM		 2719 skip = FALSE;
2720 relocate = FALSE;
252b5132 2721
c629eae0
JJ		 2722 outrel.r_offset =
2723 _bfd_elf_section_offset (output_bfd, info, input_section,
2724 rel->r_offset);
2725 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2726 skip = TRUE;
0bb2d96a 2727 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2728 skip = TRUE, relocate = TRUE;
252b5132
RH		 2729 outrel.r_offset += (input_section->output_section->vma
2730 + input_section->output_offset);
2731
2732 if (skip)
0bb2d96a 2733 memset (&outrel, 0, sizeof outrel);
e74399c4 2734 else if (COPY_INPUT_RELOC_P (info, h, r_type))
0bb2d96a 2735 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2736 else
2737 {
5a15f56f 2738 /* This symbol is local, or marked to become local. */
b34976b6 2739 relocate = TRUE;
5a15f56f 2740 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 2741 }
2742
cbe950e9 2743 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 2744
62d78908
L		 2745 if (sreloc == NULL || sreloc->contents == NULL)
2746 {
2747 r = bfd_reloc_notsupported;
2748 goto check_relocation_error;
2749 }
0c715baa 2750
59d6ffb2 2751 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 2752
2753 /* If this reloc is against an external symbol, we do
2754 not want to fiddle with the addend. Otherwise, we
2755 need to include the symbol value so that it becomes
2756 an addend for the dynamic reloc. */
0f88be7a 2757 if (! relocate)
252b5132
RH		 2758 continue;
2759 }
252b5132
RH		 2760 break;
2761
37e55690 2762 case R_386_TLS_IE:
0e1862bb 2763 if (!bfd_link_executable (info))
37e55690 2764 {
947216bf 2765 Elf_Internal_Rela outrel;
37e55690 2766 asection *sreloc;
37e55690
JJ		 2767
2768 outrel.r_offset = rel->r_offset
2769 + input_section->output_section->vma
2770 + input_section->output_offset;
2771 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2772 sreloc = elf_section_data (input_section)->sreloc;
2773 if (sreloc == NULL)
2774 abort ();
59d6ffb2 2775 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 2776 }
2777 /* Fall through */
2778
13ae64f3 2779 case R_386_TLS_GD:
67a4f2b7
AO		 2780 case R_386_TLS_GOTDESC:
2781 case R_386_TLS_DESC_CALL:
13ae64f3 2782 case R_386_TLS_IE_32:
37e55690 2783 case R_386_TLS_GOTIE:
13ae64f3
JJ		 2784 tls_type = GOT_UNKNOWN;
2785 if (h == NULL && local_got_offsets)
0afcef53 2786 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
13ae64f3 2787 else if (h != NULL)
0afcef53 2788 tls_type = elf_x86_hash_entry(h)->tls_type;
37e55690
JJ		 2789 if (tls_type == GOT_TLS_IE)
2790 tls_type = GOT_TLS_IE_NEG;
142411ca 2791
419414ea 2792 r_type_tls = r_type;
142411ca
L		 2793 if (! elf_i386_tls_transition (info, input_bfd,
2794 input_section, contents,
2795 symtab_hdr, sym_hashes,
419414ea 2796 &r_type_tls, tls_type, rel,
bedfd056 2797 relend, h, r_symndx, TRUE))
142411ca 2798 return FALSE;
13ae64f3 2799
419414ea 2800 if (r_type_tls == R_386_TLS_LE_32)
13ae64f3 2801 {
82e51918 2802 BFD_ASSERT (! unresolved_reloc);
419414ea 2803 if (r_type == R_386_TLS_GD)
13ae64f3 2804 {
142411ca 2805 unsigned int type;
13ae64f3
JJ		 2806 bfd_vma roff;
2807
2808 /* GD->LE transition. */
6eaa7fb5 2809 type = *(contents + rel->r_offset - 2);
13ae64f3
JJ		 2810 if (type == 0x04)
2811 {
6eaa7fb5
L		 2812 /* Change
2813 leal foo@tlsgd(,%ebx,1), %eax
2814 call ___tls_get_addr@PLT
2815 into:
2816 movl %gs:0, %eax
2817 subl $foo@tpoff, %eax
13ae64f3 2818 (6 byte form of subl). */
142411ca 2819 roff = rel->r_offset + 5;
13ae64f3
JJ		 2820 }
2821 else
2822 {
6eaa7fb5
L		 2823 /* Change
2824 leal foo@tlsgd(%ebx), %eax
2825 call ___tls_get_addr@PLT
2826 nop
2827 or
2828 leal foo@tlsgd(%reg), %eax
2829 call *___tls_get_addr@GOT(%reg)
2830 which may be converted to
2831 addr32 call ___tls_get_addr
2832 into:
2833 movl %gs:0, %eax; subl $foo@tpoff, %eax
142411ca 2834 (6 byte form of subl). */
142411ca 2835 roff = rel->r_offset + 6;
13ae64f3 2836 }
6eaa7fb5
L		 2837 memcpy (contents + roff - 8,
2838 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
eb4ff4d6 2839 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 2840 contents + roff);
6eaa7fb5 2841 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
13ae64f3 2842 rel++;
60f2e42e 2843 wrel++;
13ae64f3
JJ		 2844 continue;
2845 }
419414ea 2846 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 2847 {
2848 /* GDesc -> LE transition.
2849 It's originally something like:
2850 leal x@tlsdesc(%ebx), %eax
2851
2852 leal x@ntpoff, %eax
2853
2854 Registers other than %eax may be set up here. */
2855
142411ca 2856 unsigned int val;
67a4f2b7
AO		 2857 bfd_vma roff;
2858
67a4f2b7 2859 roff = rel->r_offset;
67a4f2b7 2860 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 2861
2862 /* Now modify the instruction as appropriate. */
2863 /* aoliva FIXME: remove the above and xor the byte
2864 below with 0x86. */
2865 bfd_put_8 (output_bfd, val ^ 0x86,
2866 contents + roff - 1);
eb4ff4d6 2867 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 2868 contents + roff);
2869 continue;
2870 }
419414ea 2871 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 2872 {
2873 /* GDesc -> LE transition.
2874 It's originally:
2875 call *(%eax)
2876 Turn it into:
142411ca 2877 xchg %ax,%ax */
67a4f2b7 2878
67a4f2b7 2879 bfd_vma roff;
6bbec505 2880
67a4f2b7 2881 roff = rel->r_offset;
10efb593 2882 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 2883 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2884 continue;
2885 }
419414ea 2886 else if (r_type == R_386_TLS_IE)
13ae64f3 2887 {
142411ca 2888 unsigned int val;
13ae64f3
JJ		 2889
2890 /* IE->LE transition:
37e55690
JJ		 2891 Originally it can be one of:
2892 movl foo, %eax
2893 movl foo, %reg
2894 addl foo, %reg
2895 We change it into:
2896 movl $foo, %eax
2897 movl $foo, %reg
2898 addl $foo, %reg. */
37e55690 2899 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 2900 if (val == 0xa1)
2901 {
2902 /* movl foo, %eax. */
55fd94b0
AM		 2903 bfd_put_8 (output_bfd, 0xb8,
2904 contents + rel->r_offset - 1);
37e55690 2905 }
299bf759 2906 else
37e55690 2907 {
142411ca
L		 2908 unsigned int type;
2909
55fd94b0
AM		 2910 type = bfd_get_8 (input_bfd,
2911 contents + rel->r_offset - 2);
299bf759 2912 switch (type)
26e41594 2913 {
299bf759
L		 2914 case 0x8b:
2915 /* movl */
299bf759
L		 2916 bfd_put_8 (output_bfd, 0xc7,
2917 contents + rel->r_offset - 2);
2918 bfd_put_8 (output_bfd,
2919 0xc0 | ((val >> 3) & 7),
2920 contents + rel->r_offset - 1);
2921 break;
2922 case 0x03:
2923 /* addl */
299bf759
L		 2924 bfd_put_8 (output_bfd, 0x81,
2925 contents + rel->r_offset - 2);
2926 bfd_put_8 (output_bfd,
2927 0xc0 | ((val >> 3) & 7),
2928 contents + rel->r_offset - 1);
2929 break;
2930 default:
2931 BFD_FAIL ();
2932 break;
26e41594 2933 }
37e55690 2934 }
eb4ff4d6 2935 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 2936 contents + rel->r_offset);
2937 continue;
2938 }
2939 else
2940 {
2941 unsigned int val, type;
2942
2943 /* {IE_32,GOTIE}->LE transition:
2944 Originally it can be one of:
13ae64f3 2945 subl foo(%reg1), %reg2
13ae64f3 2946 movl foo(%reg1), %reg2
37e55690 2947 addl foo(%reg1), %reg2
13ae64f3
JJ		 2948 We change it into:
2949 subl $foo, %reg2
37e55690
JJ		 2950 movl $foo, %reg2 (6 byte form)
2951 addl $foo, %reg2. */
13ae64f3
JJ		 2952 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2953 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 2954 if (type == 0x8b)
2955 {
2956 /* movl */
13ae64f3
JJ		 2957 bfd_put_8 (output_bfd, 0xc7,
2958 contents + rel->r_offset - 2);
2959 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2960 contents + rel->r_offset - 1);
2961 }
2962 else if (type == 0x2b)
2963 {
2964 /* subl */
13ae64f3
JJ		 2965 bfd_put_8 (output_bfd, 0x81,
2966 contents + rel->r_offset - 2);
2967 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2968 contents + rel->r_offset - 1);
2969 }
37e55690
JJ		 2970 else if (type == 0x03)
2971 {
2972 /* addl */
2973 bfd_put_8 (output_bfd, 0x81,
2974 contents + rel->r_offset - 2);
2975 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2976 contents + rel->r_offset - 1);
2977 }
13ae64f3
JJ		 2978 else
2979 BFD_FAIL ();
419414ea 2980 if (r_type == R_386_TLS_GOTIE)
eb4ff4d6 2981 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 2982 contents + rel->r_offset);
2983 else
eb4ff4d6 2984 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 2985 contents + rel->r_offset);
13ae64f3
JJ		 2986 continue;
2987 }
2988 }
2989
6de2ae4a 2990 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 2991 abort ();
2992
2993 if (h != NULL)
67a4f2b7
AO		 2994 {
2995 off = h->got.offset;
0afcef53 2996 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
67a4f2b7 2997 }
13ae64f3
JJ		 2998 else
2999 {
3000 if (local_got_offsets == NULL)
3001 abort ();
3002
3003 off = local_got_offsets[r_symndx];
67a4f2b7 3004 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 3005 }
3006
3007 if ((off & 1) != 0)
3008 off &= ~1;
26e41594 3009 else
13ae64f3 3010 {
947216bf 3011 Elf_Internal_Rela outrel;
91d6fa6a 3012 int dr_type;
67a4f2b7 3013 asection *sreloc;
13ae64f3 3014
6de2ae4a 3015 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3016 abort ();
3017
67a4f2b7
AO		 3018 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3019
3020 if (GOT_TLS_GDESC_P (tls_type))
3021 {
59d6ffb2 3022 bfd_byte *loc;
67a4f2b7
AO		 3023 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3024 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 3025 <= htab->elf.sgotplt->size);
3026 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3027 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 3028 + offplt
3029 + htab->sgotplt_jump_table_size);
6de2ae4a 3030 sreloc = htab->elf.srelplt;
67a4f2b7 3031 loc = sreloc->contents;
765e526c 3032 loc += (htab->next_tls_desc_index++
5ae0bfb6 3033 * sizeof (Elf32_External_Rel));
67a4f2b7 3034 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 3035 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 3036 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3037 if (indx == 0)
3038 {
3039 BFD_ASSERT (! unresolved_reloc);
3040 bfd_put_32 (output_bfd,
0afcef53 3041 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3042 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3043 + htab->sgotplt_jump_table_size + 4);
3044 }
3045 else
3046 {
3047 bfd_put_32 (output_bfd, 0,
6de2ae4a 3048 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3049 + htab->sgotplt_jump_table_size + 4);
3050 }
3051 }
3052
6de2ae4a 3053 sreloc = htab->elf.srelgot;
67a4f2b7 3054
6de2ae4a
L		 3055 outrel.r_offset = (htab->elf.sgot->output_section->vma
3056 + htab->elf.sgot->output_offset + off);
13ae64f3 3057
67a4f2b7 3058 if (GOT_TLS_GD_P (tls_type))
13ae64f3 3059 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 3060 else if (GOT_TLS_GDESC_P (tls_type))
3061 goto dr_done;
37e55690
JJ		 3062 else if (tls_type == GOT_TLS_IE_POS)
3063 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 3064 else
3065 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 3066
37e55690 3067 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6 3068 bfd_put_32 (output_bfd,
0afcef53 3069 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3070 htab->elf.sgot->contents + off);
37e55690 3071 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 3072 bfd_put_32 (output_bfd,
0afcef53 3073 _bfd_x86_elf_dtpoff_base (info) - relocation,
6de2ae4a 3074 htab->elf.sgot->contents + off);
67a4f2b7 3075 else if (dr_type != R_386_TLS_DESC)
c366c25e 3076 bfd_put_32 (output_bfd, 0,
6de2ae4a 3077 htab->elf.sgot->contents + off);
13ae64f3 3078 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 3079
59d6ffb2 3080 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 3081
67a4f2b7 3082 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 3083 {
3084 if (indx == 0)
3085 {
07d6d2b8 3086 BFD_ASSERT (! unresolved_reloc);
13ae64f3 3087 bfd_put_32 (output_bfd,
0afcef53 3088 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3089 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3090 }
3091 else
3092 {
3093 bfd_put_32 (output_bfd, 0,
6de2ae4a 3094 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3095 outrel.r_info = ELF32_R_INFO (indx,
3096 R_386_TLS_DTPOFF32);
3097 outrel.r_offset += 4;
59d6ffb2 3098 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 3099 }
3100 }
37e55690
JJ		 3101 else if (tls_type == GOT_TLS_IE_BOTH)
3102 {
3103 bfd_put_32 (output_bfd,
eb4ff4d6 3104 (indx == 0
0afcef53 3105 ? relocation - _bfd_x86_elf_dtpoff_base (info)
eb4ff4d6 3106 : 0),
6de2ae4a 3107 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 3108 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3109 outrel.r_offset += 4;
59d6ffb2 3110 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 3111 }
13ae64f3 3112
67a4f2b7 3113 dr_done:
13ae64f3
JJ		 3114 if (h != NULL)
3115 h->got.offset |= 1;
3116 else
3117 local_got_offsets[r_symndx] |= 1;
3118 }
3119
67a4f2b7
AO		 3120 if (off >= (bfd_vma) -2
3121 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 3122 abort ();
419414ea
L		 3123 if (r_type_tls == R_386_TLS_GOTDESC
3124 || r_type_tls == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3125 {
3126 relocation = htab->sgotplt_jump_table_size + offplt;
3127 unresolved_reloc = FALSE;
3128 }
419414ea 3129 else if (r_type_tls == r_type)
13ae64f3 3130 {
6de2ae4a
L		 3131 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3132 + htab->elf.sgotplt->output_offset;
3133 relocation = htab->elf.sgot->output_section->vma
3134 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 3135 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3136 && tls_type == GOT_TLS_IE_BOTH)
3137 relocation += 4;
3138 if (r_type == R_386_TLS_IE)
8c37241b 3139 relocation += g_o_t;
b34976b6 3140 unresolved_reloc = FALSE;
13ae64f3 3141 }
419414ea 3142 else if (r_type == R_386_TLS_GD)
13ae64f3
JJ		 3143 {
3144 unsigned int val, type;
3145 bfd_vma roff;
3146
3147 /* GD->IE transition. */
6eaa7fb5
L		 3148 type = *(contents + rel->r_offset - 2);
3149 val = *(contents + rel->r_offset - 1);
13ae64f3
JJ		 3150 if (type == 0x04)
3151 {
6eaa7fb5
L		 3152 /* Change
3153 leal foo@tlsgd(,%ebx,1), %eax
3154 call ___tls_get_addr@PLT
3155 into:
3156 movl %gs:0, %eax
3157 subl $foo@gottpoff(%ebx), %eax. */
13ae64f3 3158 val >>= 3;
142411ca 3159 roff = rel->r_offset - 3;
13ae64f3
JJ		 3160 }
3161 else
3162 {
6eaa7fb5
L		 3163 /* Change
3164 leal foo@tlsgd(%ebx), %eax
3165 call ___tls_get_addr@PLT
3166 nop
3167 or
3168 leal foo@tlsgd(%reg), %eax
3169 call *___tls_get_addr@GOT(%reg)
3170 which may be converted to
3171 addr32 call ___tls_get_addr
3172 into:
3173 movl %gs:0, %eax;
3174 subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 3175 roff = rel->r_offset - 2;
3176 }
3177 memcpy (contents + roff,
3178 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3179 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 3180 /* If foo is used only with foo@gotntpoff(%reg) and
3181 foo@indntpoff, but not with foo@gottpoff(%reg), change
3182 subl $foo@gottpoff(%reg), %eax
3183 into:
3184 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 3185 if (tls_type == GOT_TLS_IE_POS)
3186 contents[roff + 6] = 0x03;
8c37241b 3187 bfd_put_32 (output_bfd,
6de2ae4a
L		 3188 htab->elf.sgot->output_section->vma
3189 + htab->elf.sgot->output_offset + off
3190 - htab->elf.sgotplt->output_section->vma
3191 - htab->elf.sgotplt->output_offset,
13ae64f3 3192 contents + roff + 8);
6eaa7fb5 3193 /* Skip R_386_PLT32 and R_386_GOT32X. */
13ae64f3 3194 rel++;
60f2e42e 3195 wrel++;
13ae64f3
JJ		 3196 continue;
3197 }
419414ea 3198 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 3199 {
3200 /* GDesc -> IE transition.
3201 It's originally something like:
3202 leal x@tlsdesc(%ebx), %eax
3203
3204 Change it to:
142411ca 3205 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 3206 or:
3207 movl x@gottpoff(%ebx), %eax # before negl %eax
3208
3209 Registers other than %eax may be set up here. */
3210
67a4f2b7
AO		 3211 bfd_vma roff;
3212
3213 /* First, make sure it's a leal adding ebx to a 32-bit
3214 offset into any register, although it's probably
3215 almost always going to be eax. */
3216 roff = rel->r_offset;
67a4f2b7
AO		 3217
3218 /* Now modify the instruction as appropriate. */
3219 /* To turn a leal into a movl in the form we use it, it
3220 suffices to change the first byte from 0x8d to 0x8b.
3221 aoliva FIXME: should we decide to keep the leal, all
3222 we have to do is remove the statement below, and
3223 adjust the relaxation of R_386_TLS_DESC_CALL. */
3224 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3225
3226 if (tls_type == GOT_TLS_IE_BOTH)
3227 off += 4;
3228
3229 bfd_put_32 (output_bfd,
6de2ae4a
L		 3230 htab->elf.sgot->output_section->vma
3231 + htab->elf.sgot->output_offset + off
3232 - htab->elf.sgotplt->output_section->vma
3233 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 3234 contents + roff);
3235 continue;
3236 }
419414ea 3237 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3238 {
3239 /* GDesc -> IE transition.
3240 It's originally:
3241 call *(%eax)
3242
3243 Change it to:
142411ca 3244 xchg %ax,%ax
67a4f2b7
AO		 3245 or
3246 negl %eax
3247 depending on how we transformed the TLS_GOTDESC above.
3248 */
3249
67a4f2b7
AO		 3250 bfd_vma roff;
3251
67a4f2b7 3252 roff = rel->r_offset;
67a4f2b7
AO		 3253
3254 /* Now modify the instruction as appropriate. */
3255 if (tls_type != GOT_TLS_IE_NEG)
3256 {
10efb593
L		 3257 /* xchg %ax,%ax */
3258 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3259 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3260 }
3261 else
3262 {
3263 /* negl %eax */
3264 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3265 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3266 }
3267
3268 continue;
3269 }
3270 else
3271 BFD_ASSERT (FALSE);
13ae64f3
JJ		 3272 break;
3273
3274 case R_386_TLS_LDM:
142411ca
L		 3275 if (! elf_i386_tls_transition (info, input_bfd,
3276 input_section, contents,
3277 symtab_hdr, sym_hashes,
3278 &r_type, GOT_UNKNOWN, rel,
bedfd056 3279 relend, h, r_symndx, TRUE))
142411ca 3280 return FALSE;
13ae64f3 3281
142411ca
L		 3282 if (r_type != R_386_TLS_LDM)
3283 {
6eaa7fb5
L		 3284 /* LD->LE transition. Change
3285 leal foo@tlsldm(%ebx) %eax
3286 call ___tls_get_addr@PLT
3287 into:
3288 movl %gs:0, %eax
3289 nop
3290 leal 0(%esi,1), %esi
3291 or change
3292 leal foo@tlsldm(%reg) %eax
3293 call *___tls_get_addr@GOT(%reg)
3294 which may be converted to
3295 addr32 call ___tls_get_addr
3296 into:
3297 movl %gs:0, %eax
3298 leal 0(%esi), %esi */
142411ca 3299 BFD_ASSERT (r_type == R_386_TLS_LE_32);
6eaa7fb5
L		 3300 if (*(contents + rel->r_offset + 4) == 0xff
3301 || *(contents + rel->r_offset + 4) == 0x67)
3302 memcpy (contents + rel->r_offset - 2,
3303 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3304 else
3305 memcpy (contents + rel->r_offset - 2,
3306 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 3307 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 3308 rel++;
60f2e42e 3309 wrel++;
13ae64f3
JJ		 3310 continue;
3311 }
3312
6de2ae4a 3313 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 3314 abort ();
3315
0afcef53 3316 off = htab->tls_ld_or_ldm_got.offset;
13ae64f3
JJ		 3317 if (off & 1)
3318 off &= ~1;
3319 else
3320 {
947216bf 3321 Elf_Internal_Rela outrel;
13ae64f3 3322
6de2ae4a 3323 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3324 abort ();
3325
6de2ae4a
L		 3326 outrel.r_offset = (htab->elf.sgot->output_section->vma
3327 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 3328
3329 bfd_put_32 (output_bfd, 0,
6de2ae4a 3330 htab->elf.sgot->contents + off);
13ae64f3 3331 bfd_put_32 (output_bfd, 0,
6de2ae4a 3332 htab->elf.sgot->contents + off + 4);
13ae64f3 3333 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 3334 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
0afcef53 3335 htab->tls_ld_or_ldm_got.offset |= 1;
13ae64f3 3336 }
6de2ae4a
L		 3337 relocation = htab->elf.sgot->output_section->vma
3338 + htab->elf.sgot->output_offset + off
3339 - htab->elf.sgotplt->output_section->vma
3340 - htab->elf.sgotplt->output_offset;
b34976b6 3341 unresolved_reloc = FALSE;
13ae64f3
JJ		 3342 break;
3343
3344 case R_386_TLS_LDO_32:
0e1862bb
L		 3345 if (!bfd_link_executable (info)
3346 || (input_section->flags & SEC_CODE) == 0)
0afcef53 3347 relocation -= _bfd_x86_elf_dtpoff_base (info);
13ae64f3
JJ		 3348 else
3349 /* When converting LDO to LE, we must negate. */
eb4ff4d6 3350 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3351 break;
3352
3353 case R_386_TLS_LE_32:
13ae64f3 3354 case R_386_TLS_LE:
0e1862bb 3355 if (!bfd_link_executable (info))
37e55690 3356 {
947216bf 3357 Elf_Internal_Rela outrel;
37e55690 3358 asection *sreloc;
37e55690
JJ		 3359
3360 outrel.r_offset = rel->r_offset
3361 + input_section->output_section->vma
3362 + input_section->output_offset;
3363 if (h != NULL && h->dynindx != -1)
3364 indx = h->dynindx;
3365 else
3366 indx = 0;
3367 if (r_type == R_386_TLS_LE_32)
3368 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3369 else
3370 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3371 sreloc = elf_section_data (input_section)->sreloc;
3372 if (sreloc == NULL)
3373 abort ();
59d6ffb2 3374 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 3375 if (indx)
3376 continue;
3377 else if (r_type == R_386_TLS_LE_32)
0afcef53 3378 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
37e55690 3379 else
0afcef53 3380 relocation -= _bfd_x86_elf_dtpoff_base (info);
37e55690
JJ		 3381 }
3382 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 3383 relocation = elf_i386_tpoff (info, relocation);
37e55690 3384 else
eb4ff4d6 3385 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3386 break;
3387
252b5132
RH		 3388 default:
3389 break;
3390 }
3391
239e1f3a
AM		 3392 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3393 because such sections are not SEC_ALLOC and thus ld.so will
3394 not process them. */
8c694914 3395 if (unresolved_reloc
239e1f3a 3396 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 3397 && h->def_dynamic)
3398 && _bfd_elf_section_offset (output_bfd, info, input_section,
3399 rel->r_offset) != (bfd_vma) -1)
6a30718d 3400 {
4eca0228 3401 _bfd_error_handler
695344c0 3402 /* xgettext:c-format */
2dcf00ce 3403 (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3404 input_bfd,
3405 input_section,
2dcf00ce 3406 (uint64_t) rel->r_offset,
843fe662 3407 howto->name,
6a30718d 3408 h->root.root.string);
b34976b6 3409 return FALSE;
6a30718d 3410 }
83be169b 3411
cbe950e9 3412do_relocation:
252b5132
RH		 3413 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3414 contents, rel->r_offset,
55fd94b0 3415 relocation, 0);
252b5132 3416
62d78908 3417check_relocation_error:
cf5c0c5b 3418 if (r != bfd_reloc_ok)
252b5132 3419 {
cf5c0c5b 3420 const char *name;
ffb2e45b 3421
cf5c0c5b
AM		 3422 if (h != NULL)
3423 name = h->root.root.string;
3424 else
3425 {
3426 name = bfd_elf_string_from_elf_section (input_bfd,
3427 symtab_hdr->sh_link,
3428 sym->st_name);
3429 if (name == NULL)
b34976b6 3430 return FALSE;
cf5c0c5b 3431 if (*name == '\0')
fd361982 3432 name = bfd_section_name (sec);
cf5c0c5b 3433 }
ffb2e45b 3434
cf5c0c5b 3435 if (r == bfd_reloc_overflow)
1a72702b
AM		 3436 (*info->callbacks->reloc_overflow)
3437 (info, (h ? &h->root : NULL), name, howto->name,
3438 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
cf5c0c5b
AM		 3439 else
3440 {
4eca0228 3441 _bfd_error_handler
695344c0 3442 /* xgettext:c-format */
2dcf00ce 3443 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
d003868e 3444 input_bfd, input_section,
2dcf00ce 3445 (uint64_t) rel->r_offset, name, (int) r);
b34976b6 3446 return FALSE;
cf5c0c5b 3447 }
252b5132 3448 }
60f2e42e
L		 3449
3450 if (wrel != rel)
3451 *wrel = *rel;
3452 }
3453
3454 if (wrel != rel)
3455 {
3456 Elf_Internal_Shdr *rel_hdr;
3457 size_t deleted = rel - wrel;
3458
3459 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3460 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3461 if (rel_hdr->sh_size == 0)
3462 {
3463 /* It is too late to remove an empty reloc section. Leave
3464 one NONE reloc.
3465 ??? What is wrong with an empty section??? */
3466 rel_hdr->sh_size = rel_hdr->sh_entsize;
3467 deleted -= 1;
3468 }
3469 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3470 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3471 input_section->reloc_count -= deleted;
252b5132
RH		 3472 }
3473
b34976b6 3474 return TRUE;
252b5132
RH		 3475}
3476
3477/* Finish up dynamic symbol handling. We set the contents of various
3478 dynamic sections here. */
3479
b34976b6 3480static bfd_boolean
55fd94b0
AM		 3481elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3482 struct bfd_link_info *info,
3483 struct elf_link_hash_entry *h,
3484 Elf_Internal_Sym *sym)
252b5132 3485{
0afcef53 3486 struct elf_x86_link_hash_table *htab;
25e762b9 3487 unsigned plt_entry_size;
0afcef53 3488 struct elf_x86_link_hash_entry *eh;
aec6b87e 3489 bfd_boolean local_undefweak;
ee2fdd6f 3490 bfd_boolean use_plt_second;
252b5132 3491
0afcef53 3492 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 3493 if (htab == NULL)
3494 return FALSE;
252b5132 3495
765e526c 3496 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 3497
ee2fdd6f
L		 3498 /* Use the second PLT section only if there is .plt section. */
3499 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3500
0afcef53 3501 eh = (struct elf_x86_link_hash_entry *) h;
e133d005
L		 3502 if (eh->no_finish_dynamic_symbol)
3503 abort ();
dd7e64d4 3504
aec6b87e
L		 3505 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3506 resolved undefined weak symbols in executable so that their
3507 references have value 0 at run-time. */
c5bce5c6 3508 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
aec6b87e 3509
252b5132
RH		 3510 if (h->plt.offset != (bfd_vma) -1)
3511 {
ee2fdd6f 3512 bfd_vma plt_index, plt_offset;
252b5132 3513 bfd_vma got_offset;
947216bf
AM		 3514 Elf_Internal_Rela rel;
3515 bfd_byte *loc;
ee2fdd6f 3516 asection *plt, *resolved_plt, *gotplt, *relplt;
cbe950e9
L		 3517
3518 /* When building a static executable, use .iplt, .igot.plt and
3519 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 3520 if (htab->elf.splt != NULL)
cbe950e9 3521 {
6de2ae4a
L		 3522 plt = htab->elf.splt;
3523 gotplt = htab->elf.sgotplt;
3524 relplt = htab->elf.srelplt;
cbe950e9
L		 3525 }
3526 else
3527 {
6de2ae4a
L		 3528 plt = htab->elf.iplt;
3529 gotplt = htab->elf.igotplt;
3530 relplt = htab->elf.irelplt;
cbe950e9 3531 }
252b5132 3532
f3180fa9 3533 VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
252b5132
RH		 3534
3535 /* Get the index in the procedure linkage table which
3536 corresponds to this symbol. This is the index of this symbol
3537 in all the symbols for which we are making plt entries. The
cbe950e9 3538 first entry in the procedure linkage table is reserved.
252b5132 3539
cbe950e9 3540 Get the offset into the .got table of the entry that
252b5132 3541 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 3542 The first three are reserved.
6bbec505 3543
cbe950e9
L		 3544 For static executables, we don't reserve anything. */
3545
6de2ae4a 3546 if (plt == htab->elf.splt)
cbe950e9 3547 {
f604c2a2 3548 got_offset = (h->plt.offset / plt_entry_size
765e526c 3549 - htab->plt.has_plt0);
e1f98742 3550 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 3551 }
3552 else
3553 {
e1f98742
L		 3554 got_offset = h->plt.offset / plt_entry_size;
3555 got_offset = got_offset * 4;
cbe950e9 3556 }
252b5132 3557
f604c2a2
L		 3558 /* Fill in the entry in the procedure linkage table and update
3559 the first slot. */
765e526c 3560 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
f604c2a2 3561 plt_entry_size);
ee2fdd6f
L		 3562
3563 if (use_plt_second)
3564 {
3565 const bfd_byte *plt_entry;
3566 if (bfd_link_pic (info))
765e526c 3567 plt_entry = htab->non_lazy_plt->pic_plt_entry;
ee2fdd6f 3568 else
765e526c 3569 plt_entry = htab->non_lazy_plt->plt_entry;
ee2fdd6f 3570 memcpy (htab->plt_second->contents + eh->plt_second.offset,
765e526c 3571 plt_entry, htab->non_lazy_plt->plt_entry_size);
ee2fdd6f
L		 3572
3573 resolved_plt = htab->plt_second;
3574 plt_offset = eh->plt_second.offset;
3575 }
3576 else
3577 {
3578 resolved_plt = plt;
3579 plt_offset = h->plt.offset;
3580 }
3581
0e1862bb 3582 if (! bfd_link_pic (info))
252b5132 3583 {
252b5132 3584 bfd_put_32 (output_bfd,
cbe950e9
L		 3585 (gotplt->output_section->vma
3586 + gotplt->output_offset
252b5132 3587 + got_offset),
ee2fdd6f 3588 resolved_plt->contents + plt_offset
07d6d2b8 3589 + htab->plt.plt_got_offset);
eac338cf 3590
851b6fa1 3591 if (htab->target_os == is_vxworks)
eac338cf
PB		 3592 {
3593 int s, k, reloc_index;
3594
3595 /* Create the R_386_32 relocation referencing the GOT
3596 for this PLT entry. */
3597
3598 /* S: Current slot number (zero-based). */
765e526c 3599 s = ((h->plt.offset - htab->plt.plt_entry_size)
07d6d2b8 3600 / htab->plt.plt_entry_size);
eac338cf 3601 /* K: Number of relocations for PLTResolve. */
0e1862bb 3602 if (bfd_link_pic (info))
eac338cf
PB		 3603 k = PLTRESOLVE_RELOCS_SHLIB;
3604 else
3605 k = PLTRESOLVE_RELOCS;
3606 /* Skip the PLTresolve relocations, and the relocations for
3607 the other PLT slots. */
3608 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
765e526c 3609 loc = (htab->srelplt2->contents + reloc_index
eac338cf
PB		 3610 * sizeof (Elf32_External_Rel));
3611
ee2fdd6f
L		 3612 rel.r_offset = (plt->output_section->vma
3613 + plt->output_offset
eac338cf 3614 + h->plt.offset + 2),
7325306f 3615 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3616 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3617
3618 /* Create the R_386_32 relocation referencing the beginning of
3619 the PLT for this GOT entry. */
6de2ae4a
L		 3620 rel.r_offset = (htab->elf.sgotplt->output_section->vma
3621 + htab->elf.sgotplt->output_offset
eac338cf 3622 + got_offset);
7325306f 3623 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 3624 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 3625 loc + sizeof (Elf32_External_Rel));
eac338cf 3626 }
252b5132
RH		 3627 }
3628 else
3629 {
252b5132 3630 bfd_put_32 (output_bfd, got_offset,
ee2fdd6f 3631 resolved_plt->contents + plt_offset
07d6d2b8 3632 + htab->plt.plt_got_offset);
252b5132
RH		 3633 }
3634
aec6b87e
L		 3635 /* Fill in the entry in the global offset table. Leave the entry
3636 as zero for undefined weak symbol in PIE. No PLT relocation
3637 against undefined weak symbol in PIE. */
3638 if (!local_undefweak)
cbe950e9 3639 {
765e526c 3640 if (htab->plt.has_plt0)
f604c2a2
L		 3641 bfd_put_32 (output_bfd,
3642 (plt->output_section->vma
3643 + plt->output_offset
3644 + h->plt.offset
765e526c 3645 + htab->lazy_plt->plt_lazy_offset),
f604c2a2 3646 gotplt->contents + got_offset);
252b5132 3647
aec6b87e
L		 3648 /* Fill in the entry in the .rel.plt section. */
3649 rel.r_offset = (gotplt->output_section->vma
3650 + gotplt->output_offset
3651 + got_offset);
cf1070f1 3652 if (PLT_LOCAL_IFUNC_P (info, h))
aec6b87e 3653 {
871b3ab2 3654 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 3655 h->root.root.string,
3656 h->root.u.def.section->owner);
3657
aec6b87e
L		 3658 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3659 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3660 in the .got.plt section. */
3661 bfd_put_32 (output_bfd,
3662 (h->root.u.def.value
3663 + h->root.u.def.section->output_section->vma
3664 + h->root.u.def.section->output_offset),
3665 gotplt->contents + got_offset);
3666 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3667 /* R_386_IRELATIVE comes last. */
3668 plt_index = htab->next_irelative_index--;
3669 }
3670 else
3671 {
3672 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3673 plt_index = htab->next_jump_slot_index++;
3674 }
3675
3676 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3677 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3678
f604c2a2
L		 3679 /* Don't fill the second and third slots in PLT entry for
3680 static executables nor without PLT0. */
765e526c 3681 if (plt == htab->elf.splt && htab->plt.has_plt0)
aec6b87e
L		 3682 {
3683 bfd_put_32 (output_bfd,
3684 plt_index * sizeof (Elf32_External_Rel),
3685 plt->contents + h->plt.offset
765e526c 3686 + htab->lazy_plt->plt_reloc_offset);
f604c2a2
L		 3687 bfd_put_32 (output_bfd,
3688 - (h->plt.offset
765e526c 3689 + htab->lazy_plt->plt_plt_offset + 4),
f604c2a2 3690 (plt->contents + h->plt.offset
765e526c 3691 + htab->lazy_plt->plt_plt_offset));
aec6b87e 3692 }
e1f98742 3693 }
dd7e64d4
L		 3694 }
3695 else if (eh->plt_got.offset != (bfd_vma) -1)
3696 {
3697 bfd_vma got_offset, plt_offset;
3698 asection *plt, *got, *gotplt;
3699 const bfd_byte *got_plt_entry;
3700
dd7e64d4
L		 3701 /* Set the entry in the GOT procedure linkage table. */
3702 plt = htab->plt_got;
3703 got = htab->elf.sgot;
3704 gotplt = htab->elf.sgotplt;
3705 got_offset = h->got.offset;
3706
3707 if (got_offset == (bfd_vma) -1
3708 || plt == NULL
3709 || got == NULL
3710 || gotplt == NULL)
3711 abort ();
3712
3713 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 3714 if (! bfd_link_pic (info))
252b5132 3715 {
765e526c 3716 got_plt_entry = htab->non_lazy_plt->plt_entry;
dd7e64d4 3717 got_offset += got->output_section->vma + got->output_offset;
252b5132 3718 }
dd7e64d4
L		 3719 else
3720 {
765e526c 3721 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
dd7e64d4
L		 3722 got_offset += (got->output_section->vma
3723 + got->output_offset
3724 - gotplt->output_section->vma
3725 - gotplt->output_offset);
3726 }
3727
3728 plt_offset = eh->plt_got.offset;
3729 memcpy (plt->contents + plt_offset, got_plt_entry,
765e526c 3730 htab->non_lazy_plt->plt_entry_size);
dd7e64d4 3731 bfd_put_32 (output_bfd, got_offset,
f604c2a2 3732 (plt->contents + plt_offset
765e526c 3733 + htab->non_lazy_plt->plt_got_offset));
dd7e64d4
L		 3734 }
3735
aec6b87e
L		 3736 if (!local_undefweak
3737 && !h->def_regular
dd7e64d4
L		 3738 && (h->plt.offset != (bfd_vma) -1
3739 || eh->plt_got.offset != (bfd_vma) -1))
3740 {
3741 /* Mark the symbol as undefined, rather than as defined in
3742 the .plt section. Leave the value if there were any
3743 relocations where pointer equality matters (this is a clue
3744 for the dynamic linker, to make function pointer
3745 comparisons work between an application and shared
3746 library), otherwise set it to zero. If a function is only
3747 called from a binary, there is no need to slow down
3748 shared libraries because of that. */
3749 sym->st_shndx = SHN_UNDEF;
3750 if (!h->pointer_equality_needed)
3751 sym->st_value = 0;
252b5132
RH		 3752 }
3753
4ec09950
L		 3754 _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym);
3755
aec6b87e
L		 3756 /* Don't generate dynamic GOT relocation against undefined weak
3757 symbol in executable. */
13ae64f3 3758 if (h->got.offset != (bfd_vma) -1
0afcef53
L		 3759 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3760 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
aec6b87e 3761 && !local_undefweak)
252b5132 3762 {
947216bf 3763 Elf_Internal_Rela rel;
233cc9c1 3764 asection *relgot = htab->elf.srelgot;
252b5132
RH		 3765
3766 /* This symbol has an entry in the global offset table. Set it
3767 up. */
3768
6de2ae4a 3769 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 3770 abort ();
252b5132 3771
6de2ae4a
L		 3772 rel.r_offset = (htab->elf.sgot->output_section->vma
3773 + htab->elf.sgot->output_offset
dc810e39 3774 + (h->got.offset & ~(bfd_vma) 1));
252b5132 3775
dd5724d5
AM		 3776 /* If this is a static link, or it is a -Bsymbolic link and the
3777 symbol is defined locally or was forced to be local because
3778 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 3779 The entry in the global offset table will already have been
3780 initialized in the relocate_section function. */
710ab287 3781 if (h->def_regular
0018b0a3
L		 3782 && h->type == STT_GNU_IFUNC)
3783 {
233cc9c1
L		 3784 if (h->plt.offset == (bfd_vma) -1)
3785 {
3786 /* STT_GNU_IFUNC is referenced without PLT. */
3787 if (htab->elf.splt == NULL)
3788 {
3789 /* use .rel[a].iplt section to store .got relocations
3790 in static executable. */
3791 relgot = htab->elf.irelplt;
3792 }
6999821f 3793 if (SYMBOL_REFERENCES_LOCAL_P (info, h))
233cc9c1 3794 {
871b3ab2 3795 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 3796 h->root.root.string,
3797 h->root.u.def.section->owner);
3798
233cc9c1
L		 3799 bfd_put_32 (output_bfd,
3800 (h->root.u.def.value
3801 + h->root.u.def.section->output_section->vma
3802 + h->root.u.def.section->output_offset),
3803 htab->elf.sgot->contents + h->got.offset);
3804 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3805 }
3806 else
3807 goto do_glob_dat;
3808 }
3809 else if (bfd_link_pic (info))
710ab287
L		 3810 {
3811 /* Generate R_386_GLOB_DAT. */
3812 goto do_glob_dat;
3813 }
3814 else
3815 {
cd2b2c10 3816 asection *plt;
ee2fdd6f 3817 bfd_vma plt_offset;
cd2b2c10 3818
710ab287
L		 3819 if (!h->pointer_equality_needed)
3820 abort ();
3821
3822 /* For non-shared object, we can't use .got.plt, which
3823 contains the real function addres if we need pointer
3824 equality. We load the GOT entry with the PLT entry. */
ee2fdd6f
L		 3825 if (htab->plt_second != NULL)
3826 {
3827 plt = htab->plt_second;
3828 plt_offset = eh->plt_second.offset;
3829 }
3830 else
3831 {
3832 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3833 plt_offset = h->plt.offset;
3834 }
710ab287
L		 3835 bfd_put_32 (output_bfd,
3836 (plt->output_section->vma
ee2fdd6f 3837 + plt->output_offset + plt_offset),
6de2ae4a 3838 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 3839 return TRUE;
3840 }
0018b0a3 3841 }
0e1862bb 3842 else if (bfd_link_pic (info)
6999821f 3843 && SYMBOL_REFERENCES_LOCAL_P (info, h))
dd5724d5 3844 {
6725bdbf 3845 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 3846 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3847 }
252b5132
RH		 3848 else
3849 {
dd5724d5 3850 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 3851do_glob_dat:
6725bdbf 3852 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 3853 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 3854 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3855 }
3856
233cc9c1 3857 elf_append_rel (output_bfd, relgot, &rel);
252b5132
RH		 3858 }
3859
f5385ebf 3860 if (h->needs_copy)
252b5132 3861 {
947216bf 3862 Elf_Internal_Rela rel;
5474d94f 3863 asection *s;
252b5132
RH		 3864
3865 /* This symbol needs a copy reloc. Set it up. */
ff38b4cc 3866 VERIFY_COPY_RELOC (h, htab)
252b5132
RH		 3867
3868 rel.r_offset = (h->root.u.def.value
3869 + h->root.u.def.section->output_section->vma
3870 + h->root.u.def.section->output_offset);
3871 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
afbf7e8e 3872 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 3873 s = htab->elf.sreldynrelro;
3874 else
3875 s = htab->elf.srelbss;
3876 elf_append_rel (output_bfd, s, &rel);
252b5132
RH		 3877 }
3878
b34976b6 3879 return TRUE;
252b5132
RH		 3880}
3881
c25bc9fc
L		 3882/* Finish up local dynamic symbol handling. We set the contents of
3883 various dynamic sections here. */
3884
3885static bfd_boolean
3886elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
3887{
3888 struct elf_link_hash_entry *h
3889 = (struct elf_link_hash_entry *) *slot;
3890 struct bfd_link_info *info
23209a78 3891 = (struct bfd_link_info *) inf;
c25bc9fc
L		 3892
3893 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
3894 h, NULL);
3895}
3896
aec6b87e
L		 3897/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
3898 here since undefined weak symbol may not be dynamic and may not be
3899 called for elf_i386_finish_dynamic_symbol. */
3900
3901static bfd_boolean
3902elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
3903 void *inf)
3904{
3905 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
3906 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3907
3908 if (h->root.type != bfd_link_hash_undefweak
3909 || h->dynindx != -1)
3910 return TRUE;
3911
3912 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5f0f0847 3913 info, h, NULL);
aec6b87e
L		 3914}
3915
38701953
AM		 3916/* Used to decide how to sort relocs in an optimal manner for the
3917 dynamic linker, before writing them out. */
3918
3919static enum elf_reloc_type_class
cae1fbbb 3920elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 3921 const asection *rel_sec ATTRIBUTE_UNUSED,
3922 const Elf_Internal_Rela *rela)
38701953 3923{
cae1fbbb
L		 3924 bfd *abfd = info->output_bfd;
3925 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3926 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 3927
d9e3b590
L		 3928 if (htab->dynsym != NULL
3929 && htab->dynsym->contents != NULL)
3930 {
3931 /* Check relocation against STT_GNU_IFUNC symbol if there are
07d6d2b8 3932 dynamic symbols. */
d9e3b590 3933 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
c428ce9d
L		 3934 if (r_symndx != STN_UNDEF)
3935 {
3936 Elf_Internal_Sym sym;
3937 if (!bed->s->swap_symbol_in (abfd,
3938 (htab->dynsym->contents
3939 + r_symndx * sizeof (Elf32_External_Sym)),
3940 0, &sym))
3941 abort ();
d9e3b590 3942
c428ce9d
L		 3943 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3944 return reloc_class_ifunc;
3945 }
d9e3b590 3946 }
cae1fbbb 3947
55fd94b0 3948 switch (ELF32_R_TYPE (rela->r_info))
38701953 3949 {
c428ce9d
L		 3950 case R_386_IRELATIVE:
3951 return reloc_class_ifunc;
38701953
AM		 3952 case R_386_RELATIVE:
3953 return reloc_class_relative;
3954 case R_386_JUMP_SLOT:
3955 return reloc_class_plt;
3956 case R_386_COPY:
3957 return reloc_class_copy;
3958 default:
3959 return reloc_class_normal;
3960 }
3961}
3962
252b5132
RH		 3963/* Finish up the dynamic sections. */
3964
b34976b6 3965static bfd_boolean
55fd94b0
AM		 3966elf_i386_finish_dynamic_sections (bfd *output_bfd,
3967 struct bfd_link_info *info)
252b5132 3968{
0afcef53 3969 struct elf_x86_link_hash_table *htab;
252b5132 3970
9577f60b 3971 htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
4dfe6ac6
NC		 3972 if (htab == NULL)
3973 return FALSE;
3974
9577f60b
L		 3975 if (!htab->elf.dynamic_sections_created)
3976 return TRUE;
252b5132 3977
9577f60b 3978 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 3979 {
9577f60b
L		 3980 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3981 really seem like the right value. */
3982 elf_section_data (htab->elf.splt->output_section)
3983 ->this_hdr.sh_entsize = 4;
252b5132 3984
9577f60b 3985 if (htab->plt.has_plt0)
252b5132 3986 {
9577f60b
L		 3987 /* Fill in the special first entry in the procedure linkage
3988 table. */
9577f60b
L		 3989 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
3990 htab->lazy_plt->plt0_entry_size);
3991 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
851b6fa1 3992 htab->plt0_pad_byte,
9577f60b
L		 3993 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
3994 if (!bfd_link_pic (info))
252b5132 3995 {
9577f60b
L		 3996 bfd_put_32 (output_bfd,
3997 (htab->elf.sgotplt->output_section->vma
3998 + htab->elf.sgotplt->output_offset
3999 + 4),
4000 htab->elf.splt->contents
4001 + htab->lazy_plt->plt0_got1_offset);
4002 bfd_put_32 (output_bfd,
4003 (htab->elf.sgotplt->output_section->vma
4004 + htab->elf.sgotplt->output_offset
4005 + 8),
4006 htab->elf.splt->contents
4007 + htab->lazy_plt->plt0_got2_offset);
1f78f649 4008
851b6fa1 4009 if (htab->target_os == is_vxworks)
eac338cf 4010 {
9577f60b
L		 4011 Elf_Internal_Rela rel;
4012 int num_plts = (htab->elf.splt->size
4013 / htab->plt.plt_entry_size) - 1;
4014 unsigned char *p;
4015 asection *srelplt2 = htab->srelplt2;
4016
4017 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4018 + 4. On IA32 we use REL relocations so the
4019 addend goes in the PLT directly. */
4020 rel.r_offset = (htab->elf.splt->output_section->vma
4021 + htab->elf.splt->output_offset
4022 + htab->lazy_plt->plt0_got1_offset);
4023 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4024 R_386_32);
4025 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4026 srelplt2->contents);
4027 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4028 + 8. */
4029 rel.r_offset = (htab->elf.splt->output_section->vma
4030 + htab->elf.splt->output_offset
4031 + htab->lazy_plt->plt0_got2_offset);
4032 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4033 R_386_32);
4034 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4035 srelplt2->contents +
4036 sizeof (Elf32_External_Rel));
4037 /* Correct the .rel.plt.unloaded relocations. */
4038 p = srelplt2->contents;
4039 if (bfd_link_pic (info))
4040 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4041 else
4042 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
eac338cf 4043
9577f60b 4044 for (; num_plts; num_plts--)
1f78f649 4045 {
9577f60b 4046 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
f604c2a2 4047 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
1f78f649 4048 R_386_32);
9577f60b
L		 4049 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4050 p += sizeof (Elf32_External_Rel);
f604c2a2 4051
9577f60b
L		 4052 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4053 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4054 R_386_32);
4055 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4056 p += sizeof (Elf32_External_Rel);
1f78f649 4057 }
eac338cf
PB		 4058 }
4059 }
252b5132 4060 }
fff53dae
L		 4061 }
4062
aec6b87e
L		 4063 /* Fill PLT entries for undefined weak symbols in PIE. */
4064 if (bfd_link_pie (info))
4065 bfd_hash_traverse (&info->hash->table,
4066 elf_i386_pie_finish_undefweak_symbol,
4067 info);
4068
b34976b6 4069 return TRUE;
252b5132
RH		 4070}
4071
233cc9c1
L		 4072/* Fill PLT/GOT entries and allocate dynamic relocations for local
4073 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4074 It has to be done before elf_link_sort_relocs is called so that
4075 dynamic relocations are properly sorted. */
4076
4077static bfd_boolean
4078elf_i386_output_arch_local_syms
4079 (bfd *output_bfd ATTRIBUTE_UNUSED,
4080 struct bfd_link_info *info,
4081 void *flaginfo ATTRIBUTE_UNUSED,
4082 int (*func) (void *, const char *,
4083 Elf_Internal_Sym *,
4084 asection *,
4085 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4086{
0afcef53
L		 4087 struct elf_x86_link_hash_table *htab
4088 = elf_x86_hash_table (info, I386_ELF_DATA);
233cc9c1
L		 4089 if (htab == NULL)
4090 return FALSE;
4091
4092 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4093 htab_traverse (htab->loc_hash_table,
4094 elf_i386_finish_local_dynamic_symbol,
4095 info);
4096
4097 return TRUE;
4098}
4099
f604c2a2 4100/* Forward declaration. */
765e526c 4101static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
f604c2a2
L		 4102
4103/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4104 dynamic relocations. */
4105
4106static long
4107elf_i386_get_synthetic_symtab (bfd *abfd,
4108 long symcount ATTRIBUTE_UNUSED,
4109 asymbol **syms ATTRIBUTE_UNUSED,
4110 long dynsymcount,
4111 asymbol **dynsyms,
4112 asymbol **ret)
4113{
f493882d 4114 long count, i, n;
f604c2a2 4115 int j;
f604c2a2 4116 bfd_byte *plt_contents;
f493882d 4117 long relsize;
765e526c
L		 4118 const struct elf_x86_lazy_plt_layout *lazy_plt;
4119 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4120 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4121 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
f604c2a2
L		 4122 asection *plt;
4123 bfd_vma got_addr;
f493882d
L		 4124 enum elf_x86_plt_type plt_type;
4125 struct elf_x86_plt plts[] =
3972882e 4126 {
f493882d
L		 4127 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4128 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4129 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4130 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
f604c2a2 4131 };
144bed8d 4132
f604c2a2 4133 *ret = NULL;
144bed8d 4134
f604c2a2
L		 4135 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4136 return 0;
3972882e 4137
f604c2a2
L		 4138 if (dynsymcount <= 0)
4139 return 0;
cca5b8b6 4140
f604c2a2
L		 4141 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4142 if (relsize <= 0)
4143 return -1;
cca5b8b6 4144
f604c2a2
L		 4145 non_lazy_plt = NULL;
4146 /* Silence GCC 6. */
4147 lazy_plt = NULL;
ee2fdd6f
L		 4148 non_lazy_ibt_plt = NULL;
4149 lazy_ibt_plt = NULL;
851b6fa1 4150 switch (get_elf_x86_backend_data (abfd)->target_os)
144bed8d 4151 {
f604c2a2 4152 case is_normal:
3b4c3844 4153 case is_solaris:
f604c2a2 4154 non_lazy_plt = &elf_i386_non_lazy_plt;
ee2fdd6f
L		 4155 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4156 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 4157 /* Fall through */
4158 case is_vxworks:
4159 lazy_plt = &elf_i386_lazy_plt;
4160 break;
4161 case is_nacl:
4162 lazy_plt = &elf_i386_nacl_plt;
4163 break;
4164 }
4165
4166 got_addr = 0;
3972882e 4167
f604c2a2
L		 4168 count = 0;
4169 for (j = 0; plts[j].name != NULL; j++)
4170 {
4171 plt = bfd_get_section_by_name (abfd, plts[j].name);
90efb642 4172 if (plt == NULL || plt->size == 0)
6f25f223 4173 continue;
533d0af0 4174
f604c2a2
L		 4175 /* Get the PLT section contents. */
4176 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4177 if (plt_contents == NULL)
4178 break;
4179 if (!bfd_get_section_contents (abfd, (asection *) plt,
4180 plt_contents, 0, plt->size))
4181 {
4182 free (plt_contents);
4183 break;
4184 }
4185
4186 /* Check what kind of PLT it is. */
4187 plt_type = plt_unknown;
90efb642
L		 4188 if (plts[j].type == plt_unknown
4189 && (plt->size >= (lazy_plt->plt0_entry_size
4190 + lazy_plt->plt_entry_size)))
f604c2a2
L		 4191 {
4192 /* Match lazy PLT first. */
4193 if (memcmp (plt_contents, lazy_plt->plt0_entry,
4194 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4195 {
4196 /* The fist entry in the lazy IBT PLT is the same as the
4197 normal lazy PLT. */
4198 if (lazy_ibt_plt != NULL
90efb642 4199 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4200 lazy_ibt_plt->plt_entry,
4201 lazy_ibt_plt->plt_got_offset) == 0))
4202 plt_type = plt_lazy | plt_second;
4203 else
4204 plt_type = plt_lazy;
4205 }
f604c2a2
L		 4206 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4207 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4208 {
4209 /* The fist entry in the PIC lazy IBT PLT is the same as
4210 the normal PIC lazy PLT. */
4211 if (lazy_ibt_plt != NULL
90efb642 4212 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4213 lazy_ibt_plt->pic_plt_entry,
4214 lazy_ibt_plt->plt_got_offset) == 0))
4215 plt_type = plt_lazy | plt_pic | plt_second;
4216 else
4217 plt_type = plt_lazy | plt_pic;
4218 }
f604c2a2
L		 4219 }
4220
4221 if (non_lazy_plt != NULL
90efb642
L		 4222 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4223 && plt->size >= non_lazy_plt->plt_entry_size)
f604c2a2
L		 4224 {
4225 /* Match non-lazy PLT. */
4226 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4227 non_lazy_plt->plt_got_offset) == 0)
4228 plt_type = plt_non_lazy;
4229 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4230 non_lazy_plt->plt_got_offset) == 0)
4231 plt_type = plt_pic;
4232 }
4233
ee2fdd6f 4234 if ((non_lazy_ibt_plt != NULL)
90efb642
L		 4235 && (plt_type == plt_unknown || plt_type == plt_second)
4236 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
ee2fdd6f
L		 4237 {
4238 if (memcmp (plt_contents,
4239 non_lazy_ibt_plt->plt_entry,
4240 non_lazy_ibt_plt->plt_got_offset) == 0)
4241 {
4242 /* Match IBT PLT. */
4243 plt_type = plt_second;
4244 non_lazy_plt = non_lazy_ibt_plt;
4245 }
4246 else if (memcmp (plt_contents,
4247 non_lazy_ibt_plt->pic_plt_entry,
4248 non_lazy_ibt_plt->plt_got_offset) == 0)
4249 {
4250 /* Match PIC IBT PLT. */
4251 plt_type = plt_second | plt_pic;
4252 non_lazy_plt = non_lazy_ibt_plt;
4253 }
4254 }
4255
f604c2a2 4256 if (plt_type == plt_unknown)
37c0b6ee
L		 4257 {
4258 free (plt_contents);
4259 continue;
4260 }
3972882e 4261
f604c2a2
L		 4262 plts[j].sec = plt;
4263 plts[j].type = plt_type;
ec1f73bb 4264
f604c2a2
L		 4265 if ((plt_type & plt_lazy))
4266 {
4267 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4268 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4269 /* Skip PLT0 in lazy PLT. */
4270 i = 1;
4271 }
4272 else
4273 {
4274 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4275 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4276 i = 0;
4277 }
fca6ae69 4278
ee2fdd6f
L		 4279 /* Skip lazy PLT when the second PLT is used. */
4280 if ((plt_type & (plt_lazy | plt_second))
4281 == (plt_lazy | plt_second))
4282 plts[j].count = 0;
4283 else
4284 {
4285 n = plt->size / plts[j].plt_entry_size;
4286 plts[j].count = n;
4287 count += n - i;
4288 }
f604c2a2
L		 4289
4290 plts[j].contents = plt_contents;
4291
4292 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4293 if ((plt_type & plt_pic))
4294 got_addr = (bfd_vma) -1;
144bed8d
L		 4295 }
4296
f493882d
L		 4297 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4298 got_addr, plts, dynsyms,
4299 ret);
4c45e5c9
JJ		 4300}
4301
f604c2a2
L		 4302/* Set up i386 GNU properties. Return the first relocatable ELF input
4303 with GNU properties if found. Otherwise, return NULL. */
4304
4305static bfd *
4306elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4307{
1de031c8 4308 struct elf_x86_init_table init_table;
f604c2a2 4309
851b6fa1 4310 switch (get_elf_x86_backend_data (info->output_bfd)->target_os)
f604c2a2
L		 4311 {
4312 case is_normal:
3b4c3844 4313 case is_solaris:
851b6fa1 4314 init_table.plt0_pad_byte = 0x0;
1de031c8
L		 4315 init_table.lazy_plt = &elf_i386_lazy_plt;
4316 init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4317 init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4318 init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 4319 break;
4320 case is_vxworks:
851b6fa1 4321 init_table.plt0_pad_byte = 0x90;
1de031c8
L		 4322 init_table.lazy_plt = &elf_i386_lazy_plt;
4323 init_table.non_lazy_plt = NULL;
4324 init_table.lazy_ibt_plt = NULL;
4325 init_table.non_lazy_ibt_plt = NULL;
f604c2a2
L		 4326 break;
4327 case is_nacl:
851b6fa1 4328 init_table.plt0_pad_byte = 0x90;
1de031c8
L		 4329 init_table.lazy_plt = &elf_i386_nacl_plt;
4330 init_table.non_lazy_plt = NULL;
4331 init_table.lazy_ibt_plt = NULL;
4332 init_table.non_lazy_ibt_plt = NULL;
f604c2a2
L		 4333 break;
4334 }
4335
1de031c8
L		 4336 init_table.r_info = elf32_r_info;
4337 init_table.r_sym = elf32_r_sym;
7a382c1c 4338
1de031c8 4339 return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
f604c2a2
L		 4340}
4341
6d00b590 4342#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 4343#define TARGET_LITTLE_NAME "elf32-i386"
4344#define ELF_ARCH bfd_arch_i386
ae95ffa6 4345#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 4346#define ELF_MACHINE_CODE EM_386
4347#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 4348
4349#define elf_backend_can_gc_sections 1
51b64d56 4350#define elf_backend_can_refcount 1
252b5132
RH		 4351#define elf_backend_want_got_plt 1
4352#define elf_backend_plt_readonly 1
4353#define elf_backend_want_plt_sym 0
4354#define elf_backend_got_header_size 12
e41b3a13 4355#define elf_backend_plt_alignment 4
64f52338 4356#define elf_backend_dtrel_excludes_plt 1
f7483970 4357#define elf_backend_extern_protected_data 1
bedfd056 4358#define elf_backend_caches_rawsize 1
5474d94f 4359#define elf_backend_want_dynrelro 1
252b5132 4360
8c29f035
AM		 4361/* Support RELA for objdump of prelink objects. */
4362#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 4363#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4364
dd5724d5 4365#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
dd5724d5 4366#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 4367#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 4368#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5 4369
13285a1b 4370#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 4371#define elf_backend_check_relocs elf_i386_check_relocs
f604c2a2 4372#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
0ac8d2ca 4373#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 4374#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4375#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
233cc9c1 4376#define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
c5fccbec
DJ		 4377#define elf_backend_grok_prstatus elf_i386_grok_prstatus
4378#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 4379#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca 4380#define elf_backend_relocate_section elf_i386_relocate_section
f604c2a2 4381#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
9f857535 4382#define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
dd5724d5 4383
a2f63b2e
MR		 4384#define elf_backend_linux_prpsinfo32_ugid16 TRUE
4385
8f56f7a2
L		 4386#define elf32_bed elf32_i386_bed
4387
252b5132 4388#include "elf32-target.h"
2bc3c89a
AM		 4389
4390/* FreeBSD support. */
4391
4392#undef TARGET_LITTLE_SYM
6d00b590 4393#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 4394#undef TARGET_LITTLE_NAME
4395#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 4396#undef ELF_OSABI
4397#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 4398
4399/* The kernel recognizes executables as valid only if they carry a
4400 "FreeBSD" label in the ELF header. So we put this label on all
4401 executables and (for simplicity) also all other object files. */
4402
ed7e9d0b
AM		 4403static bfd_boolean
4404elf_i386_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 4405{
ed7e9d0b
AM		 4406 if (!_bfd_elf_init_file_header (abfd, info))
4407 return FALSE;
2bc3c89a 4408
2bc3c89a 4409#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 4410 {
4411 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4412 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4413 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4414 }
caf47ea6 4415#endif
ed7e9d0b 4416 return TRUE;
2bc3c89a
AM		 4417}
4418
ed7e9d0b
AM		 4419#undef elf_backend_init_file_header
4420#define elf_backend_init_file_header elf_i386_fbsd_init_file_header
571fe01f
NC		 4421#undef elf32_bed
4422#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 4423
d8045f23
NC		 4424#undef elf_backend_add_symbol_hook
4425
2bc3c89a 4426#include "elf32-target.h"
eac338cf 4427
ed7e9d0b
AM		 4428#undef elf_backend_init_file_header
4429
a6cc6b3b
RO		 4430/* Solaris 2. */
4431
4432#undef TARGET_LITTLE_SYM
6d00b590 4433#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO		 4434#undef TARGET_LITTLE_NAME
4435#define TARGET_LITTLE_NAME "elf32-i386-sol2"
4436
3b4c3844
L		 4437static const struct elf_x86_backend_data elf_i386_solaris_arch_bed =
4438 {
4439 is_solaris /* os */
4440 };
4441
4442#undef elf_backend_arch_data
4443#define elf_backend_arch_data &elf_i386_solaris_arch_bed
4444
a6cc6b3b
RO		 4445/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4446 objects won't be recognized. */
4447#undef ELF_OSABI
4448
4449#undef elf32_bed
4450#define elf32_bed elf32_i386_sol2_bed
4451
7dc98aea
RO		 4452/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4453 boundary. */
84865015 4454#undef elf_backend_static_tls_alignment
7dc98aea
RO		 4455#define elf_backend_static_tls_alignment 8
4456
a6cc6b3b
RO		 4457/* The Solaris 2 ABI requires a plt symbol on all platforms.
4458
4459 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4460 File, p.63. */
84865015 4461#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 4462#define elf_backend_want_plt_sym 1
4463
84865015
NC		 4464#undef elf_backend_strtab_flags
4465#define elf_backend_strtab_flags SHF_STRINGS
4466
5522f910 4467/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
07d6d2b8 4468 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5522f910
NC		 4469 FALSE otherwise. ISECTION is the best guess matching section from the
4470 input bfd IBFD, but it might be NULL. */
4471
84865015 4472static bfd_boolean
5522f910
NC		 4473elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4474 bfd *obfd ATTRIBUTE_UNUSED,
4475 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4476 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 4477{
4478 /* PR 19938: FIXME: Need to add code for setting the sh_info
5522f910
NC		 4479 and sh_link fields of Solaris specific section types. */
4480 return FALSE;
84865015 4481
5522f910 4482 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
84865015
NC		 4483 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4484
4485http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4486
4487 The following values should be set:
07d6d2b8
AM		 4488
4489Type Link Info
84865015
NC		 4490-----------------------------------------------------------------------------
4491SHT_SUNW_ancillary The section header index of 0
07d6d2b8
AM		 4492 [0x6fffffee] the associated string table.
4493
84865015 4494SHT_SUNW_capinfo The section header index of For a dynamic object, the
07d6d2b8
AM		 4495 [0x6ffffff0] the associated symbol table. section header index of
4496 the associated
84865015
NC		 4497 SHT_SUNW_capchain table,
4498 otherwise 0.
4499
4500SHT_SUNW_symsort The section header index of 0
07d6d2b8 4501 [0x6ffffff1] the associated symbol table.
84865015
NC		 4502
4503SHT_SUNW_tlssort The section header index of 0
07d6d2b8
AM		 4504 [0x6ffffff2] the associated symbol table.
4505
4506SHT_SUNW_LDYNSYM The section header index of One greater than the
4507 [0x6ffffff3] the associated string table. symbol table index of the
4508 This index is the same string last local symbol,
84865015 4509 table used by the SHT_DYNSYM STB_LOCAL. Since
07d6d2b8
AM		 4510 section. SHT_SUNW_LDYNSYM only
4511 contains local symbols,
84865015
NC		 4512 sh_info is equivalent to
4513 the number of symbols in
4514 the table.
4515
07d6d2b8
AM		 4516SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4517 [0x6ffffff5] the section header index of to named strings, the
4518 the associated section header index of
4519 SHT_SUNW_capinfo table, the associated string
4520 otherwise 0. table, otherwise 0.
84865015 4521
07d6d2b8
AM		 4522SHT_SUNW_move The section header index of 0
4523 [0x6ffffffa] the associated symbol table.
4524
4525SHT_SUNW_COMDAT 0 0
84865015
NC		 4526 [0x6ffffffb]
4527
4528SHT_SUNW_syminfo The section header index of The section header index
07d6d2b8
AM		 4529 [0x6ffffffc] the associated symbol table. of the associated
4530 .dynamic section.
84865015 4531
07d6d2b8
AM		 4532SHT_SUNW_verdef The section header index of The number of version
4533 [0x6ffffffd] the associated string table. definitions within the
4534 section.
84865015
NC		 4535
4536SHT_SUNW_verneed The section header index of The number of version
07d6d2b8
AM		 4537 [0x6ffffffe] the associated string table. dependencies within the
4538 section.
84865015 4539
07d6d2b8
AM		 4540SHT_SUNW_versym The section header index of 0
4541 [0x6fffffff] the associated symbol table. */
84865015
NC		 4542}
4543
5522f910
NC		 4544#undef elf_backend_copy_special_section_fields
4545#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
84865015 4546
a6cc6b3b
RO		 4547#include "elf32-target.h"
4548
bf64a951
L		 4549/* Intel MCU support. */
4550
4551static bfd_boolean
4552elf32_iamcu_elf_object_p (bfd *abfd)
4553{
4554 /* Set the right machine number for an IAMCU elf32 file. */
4555 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4556 return TRUE;
4557}
4558
4559#undef TARGET_LITTLE_SYM
4560#define TARGET_LITTLE_SYM iamcu_elf32_vec
4561#undef TARGET_LITTLE_NAME
4562#define TARGET_LITTLE_NAME "elf32-iamcu"
84865015 4563#undef ELF_ARCH
bf64a951
L		 4564#define ELF_ARCH bfd_arch_iamcu
4565
4566#undef ELF_MACHINE_CODE
4567#define ELF_MACHINE_CODE EM_IAMCU
4568
3b4c3844
L		 4569#undef elf_backend_arch_data
4570#define elf_backend_arch_data &elf_i386_arch_bed
4571
bf64a951
L		 4572#undef ELF_OSABI
4573
4574#undef elf32_bed
4575#define elf32_bed elf32_iamcu_bed
4576
4577#undef elf_backend_object_p
4578#define elf_backend_object_p elf32_iamcu_elf_object_p
4579
4580#undef elf_backend_static_tls_alignment
4581
4582#undef elf_backend_want_plt_sym
07d6d2b8 4583#define elf_backend_want_plt_sym 0
bf64a951 4584
84865015 4585#undef elf_backend_strtab_flags
5522f910 4586#undef elf_backend_copy_special_section_fields
84865015 4587
bf64a951
L		 4588#include "elf32-target.h"
4589
4590/* Restore defaults. */
4591#undef ELF_ARCH
4592#define ELF_ARCH bfd_arch_i386
4593#undef ELF_MACHINE_CODE
4594#define ELF_MACHINE_CODE EM_386
4595
a27e4371
RM		 4596/* Native Client support. */
4597
4598#undef TARGET_LITTLE_SYM
6d00b590 4599#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 4600#undef TARGET_LITTLE_NAME
4601#define TARGET_LITTLE_NAME "elf32-i386-nacl"
4602#undef elf32_bed
4603#define elf32_bed elf32_i386_nacl_bed
4604
4605#undef ELF_MAXPAGESIZE
4606#define ELF_MAXPAGESIZE 0x10000
4607
4608/* Restore defaults. */
4609#undef ELF_OSABI
4610#undef elf_backend_want_plt_sym
4611#define elf_backend_want_plt_sym 0
a27e4371
RM		 4612#undef elf_backend_static_tls_alignment
4613
4614/* NaCl uses substantially different PLT entries for the same effects. */
4615
4616#undef elf_backend_plt_alignment
4617#define elf_backend_plt_alignment 5
4618#define NACL_PLT_ENTRY_SIZE 64
4619#define NACLMASK 0xe0 /* 32-byte alignment mask. */
4620
4621static const bfd_byte elf_i386_nacl_plt0_entry[] =
4622 {
4623 0xff, 0x35, /* pushl contents of address */
07d6d2b8
AM		 4624 0, 0, 0, 0, /* replaced with address of .got + 4. */
4625 0x8b, 0x0d, /* movl contents of address, %ecx */
4626 0, 0, 0, 0, /* replaced with address of .got + 8. */
a27e4371
RM		 4627 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4628 0xff, 0xe1 /* jmp *%ecx */
4629 };
4630
4631static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
4632 {
4633 0x8b, 0x0d, /* movl contents of address, %ecx */
4634 0, 0, 0, 0, /* replaced with GOT slot address. */
4635 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4636 0xff, 0xe1, /* jmp *%ecx */
4637
07d6d2b8 4638 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4639 0x90,
4640 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4641 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4642
4643 /* Lazy GOT entries point here (32-byte aligned). */
4644 0x68, /* pushl immediate */
4645 0, 0, 0, 0, /* replaced with reloc offset. */
4646 0xe9, /* jmp relative */
07d6d2b8 4647 0, 0, 0, 0, /* replaced with offset to .plt. */
a27e4371 4648
07d6d2b8 4649 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4650 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4651 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4652 0x90, 0x90
4653 };
4654
4655static const bfd_byte
4656elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
4657 {
4658 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
4659 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
4660 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
4661 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 4662
4663 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
4664 so pad to that size with nop instructions. */
4665 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 4666 };
4667
4668static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
4669 {
07d6d2b8
AM		 4670 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
4671 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
4672 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
4673 0xff, 0xe1, /* jmp *%ecx */
a27e4371 4674
07d6d2b8 4675 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4676 0x90,
4677 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4678 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4679
4680 /* Lazy GOT entries point here (32-byte aligned). */
07d6d2b8
AM		 4681 0x68, /* pushl immediate */
4682 0, 0, 0, 0, /* replaced with offset into relocation table. */
4683 0xe9, /* jmp relative */
4684 0, 0, 0, 0, /* replaced with offset to start of .plt. */
a27e4371 4685
07d6d2b8 4686 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4687 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4688 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4689 0x90, 0x90
4690 };
4691
4692static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
4693 {
07d6d2b8
AM		 4694#if (PLT_CIE_LENGTH != 20 \
4695 || PLT_FDE_LENGTH != 36 \
4696 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
a27e4371 4697 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
851b6fa1 4698# error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
a27e4371
RM		 4699#endif
4700 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
07d6d2b8
AM		 4701 0, 0, 0, 0, /* CIE ID */
4702 1, /* CIE version */
4703 'z', 'R', 0, /* Augmentation string */
4704 1, /* Code alignment factor */
4705 0x7c, /* Data alignment factor: -4 */
4706 8, /* Return address column */
a27e4371
RM		 4707 1, /* Augmentation size */
4708 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
4709 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
4710 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
4711 DW_CFA_nop, DW_CFA_nop,
4712
07d6d2b8 4713 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
a27e4371 4714 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
07d6d2b8
AM		 4715 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
4716 0, 0, 0, 0, /* .plt size goes here */
4717 0, /* Augmentation size */
4718 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
4719 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
4720 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
4721 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
4722 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
4723 13, /* Block length */
4724 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
4725 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
a27e4371
RM		 4726 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
4727 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
4728 DW_CFA_nop, DW_CFA_nop
4729 };
4730
765e526c 4731static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
a27e4371
RM		 4732 {
4733 elf_i386_nacl_plt0_entry, /* plt0_entry */
4734 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
a27e4371
RM		 4735 elf_i386_nacl_plt_entry, /* plt_entry */
4736 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
92e68c1d
L		 4737 NULL, /* plt_tlsdesc_entry */
4738 0, /* plt_tlsdesc_entry_size*/
4739 0, /* plt_tlsdesc_got1_offset */
4740 0, /* plt_tlsdesc_got2_offset */
4741 0, /* plt_tlsdesc_got1_insn_end */
4742 0, /* plt_tlsdesc_got2_insn_end */
765e526c
L		 4743 2, /* plt0_got1_offset */
4744 8, /* plt0_got2_offset */
4745 0, /* plt0_got2_insn_end */
a27e4371
RM		 4746 2, /* plt_got_offset */
4747 33, /* plt_reloc_offset */
4748 38, /* plt_plt_offset */
765e526c
L		 4749 0, /* plt_got_insn_size */
4750 0, /* plt_plt_insn_end */
a27e4371
RM		 4751 32, /* plt_lazy_offset */
4752 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
4753 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
4754 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
f604c2a2 4755 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
a27e4371
RM		 4756 };
4757
851b6fa1 4758static const struct elf_x86_backend_data elf_i386_nacl_arch_bed =
a27e4371 4759 {
07d6d2b8 4760 is_nacl /* os */
a27e4371
RM		 4761 };
4762
64b384e1
RM		 4763static bfd_boolean
4764elf32_i386_nacl_elf_object_p (bfd *abfd)
4765{
4766 /* Set the right machine number for a NaCl i386 ELF32 file. */
4767 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
4768 return TRUE;
4769}
4770
a27e4371
RM		 4771#undef elf_backend_arch_data
4772#define elf_backend_arch_data &elf_i386_nacl_arch_bed
4773
64b384e1
RM		 4774#undef elf_backend_object_p
4775#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 4776#undef elf_backend_modify_segment_map
4777#define elf_backend_modify_segment_map nacl_modify_segment_map
6d6c25c8
AM		 4778#undef elf_backend_modify_headers
4779#define elf_backend_modify_headers nacl_modify_headers
887badb3
RM		 4780#undef elf_backend_final_write_processing
4781#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 4782
a27e4371
RM		 4783#include "elf32-target.h"
4784
5a68afcf 4785/* Restore defaults. */
64b384e1 4786#undef elf_backend_object_p
5a68afcf 4787#undef elf_backend_modify_segment_map
6d6c25c8 4788#undef elf_backend_modify_headers
887badb3 4789#undef elf_backend_final_write_processing
5a68afcf 4790
eac338cf
PB		 4791/* VxWorks support. */
4792
4793#undef TARGET_LITTLE_SYM
6d00b590 4794#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 4795#undef TARGET_LITTLE_NAME
4796#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 4797#undef ELF_OSABI
1587442d
L		 4798#undef ELF_MAXPAGESIZE
4799#define ELF_MAXPAGESIZE 0x1000
a27e4371
RM		 4800#undef elf_backend_plt_alignment
4801#define elf_backend_plt_alignment 4
eac338cf 4802
851b6fa1 4803static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed =
23209a78 4804 {
07d6d2b8 4805 is_vxworks /* os */
23209a78 4806 };
eac338cf 4807
23209a78
RM		 4808#undef elf_backend_arch_data
4809#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 4810
13285a1b 4811#undef elf_backend_relocs_compatible
eac338cf
PB		 4812#undef elf_backend_add_symbol_hook
4813#define elf_backend_add_symbol_hook \
4814 elf_vxworks_add_symbol_hook
4815#undef elf_backend_link_output_symbol_hook
4816#define elf_backend_link_output_symbol_hook \
9c72ff84 4817 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 4818#undef elf_backend_emit_relocs
4819#define elf_backend_emit_relocs elf_vxworks_emit_relocs
4820#undef elf_backend_final_write_processing
4821#define elf_backend_final_write_processing \
4822 elf_vxworks_final_write_processing
7dc98aea 4823#undef elf_backend_static_tls_alignment
eac338cf
PB		 4824
4825/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4826 define it. */
4827#undef elf_backend_want_plt_sym
4828#define elf_backend_want_plt_sym 1
4829
4830#undef elf32_bed
4831#define elf32_bed elf32_i386_vxworks_bed
4832
4833#include "elf32-target.h"
GDB Binutils - Deliverables
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