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Correct the calculation of offsets for ARM exidx relocs when performing a partial...
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
CommitLineData
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;
13a2df29
L		 1578
1579 if (h->type == STT_GNU_IFUNC)
1580 elf_tdata (info->output_bfd)->has_gnu_symbols
1581 |= elf_gnu_symbol_ifunc;
71cb9464 1582 }
252b5132 1583
6999821f
L		 1584 if (r_type == R_386_GOT32X
1585 && (h == NULL || h->type != STT_GNU_IFUNC))
1586 {
1587 Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
1588 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
5e5e02ae
L		 1589 &r_type, irel, h,
1590 &converted, info))
6999821f
L		 1591 goto error_return;
1592 }
1593
bedfd056 1594 if (! elf_i386_tls_transition (info, abfd, sec, contents,
142411ca
L		 1595 symtab_hdr, sym_hashes,
1596 &r_type, GOT_UNKNOWN,
bedfd056 1597 rel, rel_end, h, r_symndx, FALSE))
c337a162 1598 goto error_return;
13ae64f3 1599
cd048363
L		 1600 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1601 if (h == htab->elf.hgot)
1602 htab->got_referenced = TRUE;
1603
13ae64f3 1604 switch (r_type)
252b5132 1605 {
37e55690 1606 case R_386_TLS_LDM:
0f09b4d8 1607 htab->tls_ld_or_ldm_got.refcount = 1;
37e55690
JJ		 1608 goto create_got;
1609
1610 case R_386_PLT32:
1611 /* This symbol requires a procedure linkage table entry. We
1612 actually build the entry in adjust_dynamic_symbol,
1613 because this might be a case of linking PIC code which is
1614 never referenced by a dynamic object, in which case we
1615 don't need to generate a procedure linkage table entry
1616 after all. */
1617
1618 /* If this is a local symbol, we resolve it directly without
1619 creating a procedure linkage table entry. */
1620 if (h == NULL)
1621 continue;
1622
98b273dc 1623 eh->zero_undefweak &= 0x2;
f5385ebf 1624 h->needs_plt = 1;
79b0c981 1625 h->plt.refcount = 1;
37e55690
JJ		 1626 break;
1627
6a3e1bae 1628 case R_386_SIZE32:
06a6a421 1629 size_reloc = TRUE;
6a3e1bae
L		 1630 goto do_size;
1631
13ae64f3 1632 case R_386_TLS_IE_32:
37e55690
JJ		 1633 case R_386_TLS_IE:
1634 case R_386_TLS_GOTIE:
0e1862bb 1635 if (!bfd_link_executable (info))
13ae64f3 1636 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1637 /* Fall through */
1638
252b5132 1639 case R_386_GOT32:
02a86693 1640 case R_386_GOT32X:
13ae64f3 1641 case R_386_TLS_GD:
67a4f2b7
AO		 1642 case R_386_TLS_GOTDESC:
1643 case R_386_TLS_DESC_CALL:
252b5132 1644 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1645 {
1646 int tls_type, old_tls_type;
1647
1648 switch (r_type)
1649 {
1650 default:
02a86693
L		 1651 case R_386_GOT32:
1652 case R_386_GOT32X:
1653 tls_type = GOT_NORMAL;
1654 break;
13ae64f3 1655 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1656 case R_386_TLS_GOTDESC:
1657 case R_386_TLS_DESC_CALL:
1658 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1659 case R_386_TLS_IE_32:
1660 if (ELF32_R_TYPE (rel->r_info) == r_type)
1661 tls_type = GOT_TLS_IE_NEG;
1662 else
ebcfb3c0
JJ		 1663 /* If this is a GD->IE transition, we may use either of
1664 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1665 tls_type = GOT_TLS_IE;
1666 break;
1667 case R_386_TLS_IE:
1668 case R_386_TLS_GOTIE:
1669 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1670 }
1671
1672 if (h != NULL)
1673 {
0f09b4d8 1674 h->got.refcount = 1;
0afcef53 1675 old_tls_type = elf_x86_hash_entry (h)->tls_type;
13ae64f3
JJ		 1676 }
1677 else
1678 {
1679 bfd_signed_vma *local_got_refcounts;
1680
1681 /* This is a global offset table entry for a local symbol. */
1682 local_got_refcounts = elf_local_got_refcounts (abfd);
1683 if (local_got_refcounts == NULL)
1684 {
1685 bfd_size_type size;
1686
1687 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1688 size *= (sizeof (bfd_signed_vma)
1689 + sizeof (bfd_vma) + sizeof(char));
a50b1753 1690 local_got_refcounts = (bfd_signed_vma *)
07d6d2b8 1691 bfd_zalloc (abfd, size);
13ae64f3 1692 if (local_got_refcounts == NULL)
c337a162 1693 goto error_return;
13ae64f3 1694 elf_local_got_refcounts (abfd) = local_got_refcounts;
0afcef53 1695 elf_x86_local_tlsdesc_gotent (abfd)
67a4f2b7 1696 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
0afcef53 1697 elf_x86_local_got_tls_type (abfd)
67a4f2b7 1698 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3 1699 }
0f09b4d8 1700 local_got_refcounts[r_symndx] = 1;
0afcef53 1701 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
13ae64f3
JJ		 1702 }
1703
37e55690
JJ		 1704 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1705 tls_type |= old_tls_type;
13ae64f3
JJ		 1706 /* If a TLS symbol is accessed using IE at least once,
1707 there is no point to use dynamic model for it. */
ebcfb3c0 1708 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1709 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1710 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1711 {
67a4f2b7 1712 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1713 tls_type = old_tls_type;
67a4f2b7
AO		 1714 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1715 && GOT_TLS_GD_ANY_P (tls_type))
1716 tls_type |= old_tls_type;
13ae64f3
JJ		 1717 else
1718 {
09a24cbf 1719 if (h)
4c544807
L		 1720 name = h->root.root.string;
1721 else
1722 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1723 NULL);
4eca0228 1724 _bfd_error_handler
695344c0 1725 /* xgettext:c-format */
871b3ab2 1726 (_("%pB: `%s' accessed both as normal and "
55fd94b0 1727 "thread local symbol"),
4c544807 1728 abfd, name);
68c4a57e 1729 bfd_set_error (bfd_error_bad_value);
c337a162 1730 goto error_return;
13ae64f3
JJ		 1731 }
1732 }
1733
1734 if (old_tls_type != tls_type)
1735 {
1736 if (h != NULL)
0afcef53 1737 elf_x86_hash_entry (h)->tls_type = tls_type;
13ae64f3 1738 else
0afcef53 1739 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
13ae64f3
JJ		 1740 }
1741 }
0ac8d2ca
AM		 1742 /* Fall through */
1743
1744 case R_386_GOTOFF:
1745 case R_386_GOTPC:
cd048363 1746create_got:
37e55690 1747 if (r_type != R_386_TLS_IE)
aec6b87e
L		 1748 {
1749 if (eh != NULL)
cd048363
L		 1750 {
1751 eh->zero_undefweak &= 0x2;
1752
1753 /* Need GOT to resolve undefined weak symbol to 0. */
1754 if (r_type == R_386_GOTOFF
1755 && h->root.type == bfd_link_hash_undefweak
1756 && bfd_link_executable (info))
1757 htab->got_referenced = TRUE;
1758 }
aec6b87e
L		 1759 break;
1760 }
37e55690 1761 /* Fall through */
252b5132 1762
37e55690
JJ		 1763 case R_386_TLS_LE_32:
1764 case R_386_TLS_LE:
aec6b87e 1765 if (eh != NULL)
98b273dc 1766 eh->zero_undefweak &= 0x2;
0e1862bb 1767 if (bfd_link_executable (info))
37e55690 1768 break;
bffbf940 1769 info->flags |= DF_STATIC_TLS;
aec6b87e 1770 goto do_relocation;
252b5132
RH		 1771
1772 case R_386_32:
1773 case R_386_PC32:
aec6b87e 1774 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
98b273dc 1775 eh->zero_undefweak |= 0x2;
aec6b87e 1776do_relocation:
bf52d7c7
L		 1777 /* We are called after all symbols have been resolved. Only
1778 relocation against STT_GNU_IFUNC symbol must go through
1779 PLT. */
d1ed1c7d
L		 1780 if (h != NULL
1781 && (bfd_link_executable (info)
bf52d7c7 1782 || h->type == STT_GNU_IFUNC))
6725bdbf 1783 {
79b0c981 1784 bfd_boolean func_pointer_ref = FALSE;
233cc9c1 1785
4b627c18
L		 1786 if (r_type == R_386_PC32)
1787 {
1788 /* Since something like ".long foo - ." may be used
1789 as pointer, make sure that PLT is used if foo is
1790 a function defined in a shared library. */
1791 if ((sec->flags & SEC_CODE) == 0)
1792 h->pointer_equality_needed = 1;
74437ea2
L		 1793 else if (h->type == STT_GNU_IFUNC
1794 && bfd_link_pic (info))
1795 {
6322e5c5
L		 1796 _bfd_error_handler
1797 /* xgettext:c-format */
871b3ab2 1798 (_("%pB: unsupported non-PIC call to IFUNC `%s'"),
6322e5c5 1799 abfd, h->root.root.string);
74437ea2
L		 1800 bfd_set_error (bfd_error_bad_value);
1801 goto error_return;
1802 }
4b627c18
L		 1803 }
1804 else
04ebc307
L		 1805 {
1806 h->pointer_equality_needed = 1;
1807 /* R_386_32 can be resolved at run-time. */
1808 if (r_type == R_386_32
1809 && (sec->flags & SEC_READONLY) == 0)
79b0c981
L		 1810 func_pointer_ref = TRUE;
1811 }
1812
1813 if (!func_pointer_ref)
1814 {
1815 /* If this reloc is in a read-only section, we might
1816 need a copy reloc. We can't check reliably at this
1817 stage whether the section is read-only, as input
1818 sections have not yet been mapped to output sections.
1819 Tentatively set the flag for now, and correct in
1820 adjust_dynamic_symbol. */
1821 h->non_got_ref = 1;
1822
1823 /* We may need a .plt entry if the symbol is a function
1824 defined in a shared lib or is a function referenced
1825 from the code or read-only section. */
1826 if (!h->def_regular
1827 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1828 h->plt.refcount = 1;
04ebc307 1829 }
6725bdbf 1830 }
7843f00e 1831
06a6a421 1832 size_reloc = FALSE;
6a3e1bae 1833do_size:
451875b4 1834 if (NEED_DYNAMIC_RELOCATION_P (info, FALSE, h, sec, r_type,
daf1c414 1835 R_386_32))
252b5132 1836 {
e03a8ed8
L		 1837 struct elf_dyn_relocs *p;
1838 struct elf_dyn_relocs **head;
ec338859 1839
12d0ee4a
AM		 1840 /* We must copy these reloc types into the output file.
1841 Create a reloc section in dynobj and make room for
1842 this reloc. */
252b5132
RH		 1843 if (sreloc == NULL)
1844 {
83bac4b0
NC		 1845 sreloc = _bfd_elf_make_dynamic_reloc_section
1846 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1847
252b5132 1848 if (sreloc == NULL)
c337a162 1849 goto error_return;
252b5132
RH		 1850 }
1851
0c715baa
AM		 1852 /* If this is a global symbol, we count the number of
1853 relocations we need for this symbol. */
1854 if (h != NULL)
252b5132 1855 {
d5597ebc 1856 head = &eh->dyn_relocs;
0c715baa
AM		 1857 }
1858 else
1859 {
ec338859
AM		 1860 /* Track dynamic relocs needed for local syms too.
1861 We really need local syms available to do this
1862 easily. Oh well. */
87d72d41 1863 void **vpp;
ec338859 1864 asection *s;
87d72d41
AM		 1865
1866 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1867 abfd, r_symndx);
1868 if (isym == NULL)
c337a162 1869 goto error_return;
87d72d41
AM		 1870
1871 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1872 if (s == NULL)
87d72d41 1873 s = sec;
ec338859 1874
e81d3500 1875 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1876 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 1877 }
1878
1879 p = *head;
1880 if (p == NULL || p->sec != sec)
1881 {
1882 bfd_size_type amt = sizeof *p;
a50b1753 1883 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
07d6d2b8 1884 amt);
ec338859 1885 if (p == NULL)
c337a162 1886 goto error_return;
ec338859
AM		 1887 p->next = *head;
1888 *head = p;
1889 p->sec = sec;
1890 p->count = 0;
1891 p->pc_count = 0;
252b5132 1892 }
ec338859
AM		 1893
1894 p->count += 1;
06a6a421
L		 1895 /* Count size relocation as PC-relative relocation. */
1896 if (r_type == R_386_PC32 || size_reloc)
ec338859 1897 p->pc_count += 1;
252b5132 1898 }
252b5132
RH		 1899 break;
1900
1901 /* This relocation describes the C++ object vtable hierarchy.
1902 Reconstruct it for later use during GC. */
1903 case R_386_GNU_VTINHERIT:
d17e0c6e 1904 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c337a162 1905 goto error_return;
252b5132
RH		 1906 break;
1907
1908 /* This relocation describes which C++ vtable entries are actually
1909 used. Record for later use during GC. */
1910 case R_386_GNU_VTENTRY:
a0ea3a14 1911 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c337a162 1912 goto error_return;
252b5132
RH		 1913 break;
1914
1915 default:
1916 break;
1917 }
1918 }
1919
bedfd056
L		 1920 if (elf_section_data (sec)->this_hdr.contents != contents)
1921 {
5e5e02ae 1922 if (!converted && !info->keep_memory)
bedfd056
L		 1923 free (contents);
1924 else
1925 {
5e5e02ae
L		 1926 /* Cache the section contents for elf_link_input_bfd if any
1927 load is converted or --no-keep-memory isn't used. */
bedfd056
L		 1928 elf_section_data (sec)->this_hdr.contents = contents;
1929 }
1930 }
1931
5e5e02ae
L		 1932 /* Cache relocations if any load is converted. */
1933 if (elf_section_data (sec)->relocs != relocs && converted)
1934 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
1935
b34976b6 1936 return TRUE;
c337a162
L		 1937
1938error_return:
bedfd056
L		 1939 if (elf_section_data (sec)->this_hdr.contents != contents)
1940 free (contents);
c337a162
L		 1941 sec->check_relocs_failed = 1;
1942 return FALSE;
252b5132
RH		 1943}
1944
38701953
AM		 1945/* Set the correct type for an x86 ELF section. We do this by the
1946 section name, which is a hack, but ought to work. */
1947
b34976b6 1948static bfd_boolean
55fd94b0
AM		 1949elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1950 Elf_Internal_Shdr *hdr,
1951 asection *sec)
38701953 1952{
91d6fa6a 1953 const char *name;
38701953
AM		 1954
1955 name = bfd_get_section_name (abfd, sec);
1956
1957 /* This is an ugly, but unfortunately necessary hack that is
1958 needed when producing EFI binaries on x86. It tells
1959 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1960 containing ELF relocation info. We need this hack in order to
1961 be able to generate ELF binaries that can be translated into
1962 EFI applications (which are essentially COFF objects). Those
1963 files contain a COFF ".reloc" section inside an ELFNN object,
1964 which would normally cause BFD to segfault because it would
1965 attempt to interpret this section as containing relocation
1966 entries for section "oc". With this hack enabled, ".reloc"
1967 will be treated as a normal data section, which will avoid the
1968 segfault. However, you won't be able to create an ELFNN binary
1969 with a section named "oc" that needs relocations, but that's
1970 the kind of ugly side-effects you get when detecting section
1971 types based on their names... In practice, this limitation is
1972 unlikely to bite. */
1973 if (strcmp (name, ".reloc") == 0)
1974 hdr->sh_type = SHT_PROGBITS;
1975
b34976b6 1976 return TRUE;
38701953
AM		 1977}
1978
13ae64f3
JJ		 1979/* Return the relocation value for @tpoff relocation
1980 if STT_TLS virtual address is ADDRESS. */
1981
1982static bfd_vma
eb4ff4d6 1983elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 1984{
e1918d23 1985 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 1986 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
1987 bfd_vma static_tls_size;
13ae64f3 1988
e1918d23
AM		 1989 /* If tls_sec is NULL, we should have signalled an error already. */
1990 if (htab->tls_sec == NULL)
6a30718d 1991 return 0;
7dc98aea
RO		 1992
1993 /* Consider special static TLS alignment requirements. */
1994 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
1995 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 1996}
1997
252b5132
RH		 1998/* Relocate an i386 ELF section. */
1999
b34976b6 2000static bfd_boolean
55fd94b0
AM		 2001elf_i386_relocate_section (bfd *output_bfd,
2002 struct bfd_link_info *info,
2003 bfd *input_bfd,
2004 asection *input_section,
2005 bfd_byte *contents,
2006 Elf_Internal_Rela *relocs,
2007 Elf_Internal_Sym *local_syms,
2008 asection **local_sections)
252b5132 2009{
0afcef53 2010 struct elf_x86_link_hash_table *htab;
252b5132
RH		 2011 Elf_Internal_Shdr *symtab_hdr;
2012 struct elf_link_hash_entry **sym_hashes;
2013 bfd_vma *local_got_offsets;
67a4f2b7 2014 bfd_vma *local_tlsdesc_gotents;
252b5132 2015 Elf_Internal_Rela *rel;
60f2e42e 2016 Elf_Internal_Rela *wrel;
252b5132 2017 Elf_Internal_Rela *relend;
3348747a 2018 bfd_boolean is_vxworks_tls;
25e762b9 2019 unsigned plt_entry_size;
252b5132 2020
c337a162
L		 2021 /* Skip if check_relocs failed. */
2022 if (input_section->check_relocs_failed)
2023 return FALSE;
2024
0afcef53 2025 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2026 if (htab == NULL)
2027 return FALSE;
fe53b4a4 2028
7af5d5c4
AM		 2029 if (!is_x86_elf (input_bfd, htab))
2030 {
2031 bfd_set_error (bfd_error_wrong_format);
2032 return FALSE;
2033 }
fe53b4a4 2034
0ffa91dd 2035 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 2036 sym_hashes = elf_sym_hashes (input_bfd);
2037 local_got_offsets = elf_local_got_offsets (input_bfd);
0afcef53 2038 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 2039 /* We have to handle relocations in vxworks .tls_vars sections
2040 specially, because the dynamic loader is 'weird'. */
851b6fa1 2041 is_vxworks_tls = (htab->target_os == is_vxworks
07d6d2b8 2042 && bfd_link_pic (info)
3348747a
NS		 2043 && !strcmp (input_section->output_section->name,
2044 ".tls_vars"));
252b5132 2045
0afcef53 2046 _bfd_x86_elf_set_tls_module_base (info);
9f03412a 2047
765e526c 2048 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 2049
60f2e42e 2050 rel = wrel = relocs;
252b5132 2051 relend = relocs + input_section->reloc_count;
60f2e42e 2052 for (; rel < relend; wrel++, rel++)
252b5132 2053 {
419414ea 2054 unsigned int r_type, r_type_tls;
252b5132
RH		 2055 reloc_howto_type *howto;
2056 unsigned long r_symndx;
2057 struct elf_link_hash_entry *h;
0afcef53 2058 struct elf_x86_link_hash_entry *eh;
252b5132
RH		 2059 Elf_Internal_Sym *sym;
2060 asection *sec;
dd7e64d4 2061 bfd_vma off, offplt, plt_offset;
252b5132 2062 bfd_vma relocation;
b34976b6 2063 bfd_boolean unresolved_reloc;
252b5132 2064 bfd_reloc_status_type r;
1b452ec6 2065 unsigned int indx;
13ae64f3 2066 int tls_type;
1788fc08 2067 bfd_vma st_size;
dd7e64d4 2068 asection *resolved_plt;
aec6b87e 2069 bfd_boolean resolved_to_zero;
e133d005 2070 bfd_boolean relative_reloc;
252b5132
RH		 2071
2072 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 2073 if (r_type == R_386_GNU_VTINHERIT
2074 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 2075 {
2076 if (wrel != rel)
2077 *wrel = *rel;
2078 continue;
2079 }
dc47f327 2080
b366503e 2081 howto = elf_i386_rtype_to_howto (r_type);
76268e02 2082 if (howto == NULL)
47aeb64c
NC		 2083 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2084
252b5132 2085 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 2086 h = NULL;
2087 sym = NULL;
2088 sec = NULL;
b34976b6 2089 unresolved_reloc = FALSE;
252b5132
RH		 2090 if (r_symndx < symtab_hdr->sh_info)
2091 {
2092 sym = local_syms + r_symndx;
2093 sec = local_sections[r_symndx];
2094 relocation = (sec->output_section->vma
2095 + sec->output_offset
2096 + sym->st_value);
1788fc08 2097 st_size = sym->st_size;
ab96bf03
AM		 2098
2099 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2100 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 2101 || (bfd_link_relocatable (info)
ab96bf03 2102 && sec->output_offset != 0)))
f8df10f4 2103 {
f8df10f4 2104 bfd_vma addend;
4a335f3d 2105 bfd_byte *where = contents + rel->r_offset;
f8df10f4 2106
4a335f3d 2107 switch (howto->size)
f8df10f4 2108 {
4a335f3d
AM		 2109 case 0:
2110 addend = bfd_get_8 (input_bfd, where);
2111 if (howto->pc_relative)
2112 {
2113 addend = (addend ^ 0x80) - 0x80;
2114 addend += 1;
2115 }
2116 break;
2117 case 1:
2118 addend = bfd_get_16 (input_bfd, where);
2119 if (howto->pc_relative)
2120 {
2121 addend = (addend ^ 0x8000) - 0x8000;
2122 addend += 2;
2123 }
2124 break;
2125 case 2:
2126 addend = bfd_get_32 (input_bfd, where);
2127 if (howto->pc_relative)
2128 {
2129 addend = (addend ^ 0x80000000) - 0x80000000;
2130 addend += 4;
2131 }
2132 break;
2133 default:
2134 abort ();
f8df10f4
JJ		 2135 }
2136
0e1862bb 2137 if (bfd_link_relocatable (info))
ab96bf03
AM		 2138 addend += sec->output_offset;
2139 else
2140 {
2141 asection *msec = sec;
2142 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2143 addend);
2144 addend -= relocation;
2145 addend += msec->output_section->vma + msec->output_offset;
2146 }
4a335f3d
AM		 2147
2148 switch (howto->size)
2149 {
2150 case 0:
16a10388 2151 /* FIXME: overflow checks. */
4a335f3d
AM		 2152 if (howto->pc_relative)
2153 addend -= 1;
2154 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 2155 break;
2156 case 1:
2157 if (howto->pc_relative)
2158 addend -= 2;
2159 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 2160 break;
2161 case 2:
2162 if (howto->pc_relative)
2163 addend -= 4;
2164 bfd_put_32 (input_bfd, addend, where);
2165 break;
2166 }
f8df10f4 2167 }
0e1862bb 2168 else if (!bfd_link_relocatable (info)
1f85278f 2169 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 2170 {
2171 /* Relocate against local STT_GNU_IFUNC symbol. */
0afcef53
L		 2172 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2173 FALSE);
c25bc9fc
L		 2174 if (h == NULL)
2175 abort ();
2176
23209a78 2177 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 2178 h->root.u.def.value = sym->st_value;
2179 h->root.u.def.section = sec;
2180 }
252b5132
RH		 2181 }
2182 else
2183 {
3d540e93 2184 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 2185 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 2186
b2a8e766
AM		 2187 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2188 r_symndx, symtab_hdr, sym_hashes,
2189 h, sec, relocation,
62d887d4 2190 unresolved_reloc, warned, ignored);
1788fc08 2191 st_size = h->size;
252b5132
RH		 2192 }
2193
dbaa2011 2194 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 2195 {
2196 _bfd_clear_contents (howto, input_bfd, input_section,
0930cb30 2197 contents, rel->r_offset);
60f2e42e
L		 2198 wrel->r_offset = rel->r_offset;
2199 wrel->r_info = 0;
2200 wrel->r_addend = 0;
2201
2202 /* For ld -r, remove relocations in debug sections against
2203 sections defined in discarded sections. Not done for
2204 eh_frame editing code expects to be present. */
2205 if (bfd_link_relocatable (info)
2206 && (input_section->flags & SEC_DEBUGGING))
2207 wrel--;
2208
2209 continue;
2210 }
9635fe29 2211
0e1862bb 2212 if (bfd_link_relocatable (info))
2d5da473
L		 2213 {
2214 if (wrel != rel)
2215 *wrel = *rel;
2216 continue;
2217 }
ab96bf03 2218
0afcef53 2219 eh = (struct elf_x86_link_hash_entry *) h;
ee2fdd6f 2220
cbe950e9
L		 2221 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2222 it here if it is defined in a non-shared object. */
2223 if (h != NULL
2224 && h->type == STT_GNU_IFUNC
2225 && h->def_regular)
2226 {
ee2fdd6f 2227 asection *gotplt, *base_got;
cbe950e9 2228 bfd_vma plt_index;
4c544807 2229 const char *name;
cbe950e9 2230
97dc35c8
L		 2231 if ((input_section->flags & SEC_ALLOC) == 0)
2232 {
347a8774
L		 2233 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2234 STT_GNU_IFUNC symbol as STT_FUNC. */
2235 if (elf_section_type (input_section) == SHT_NOTE)
2236 goto skip_ifunc;
97dc35c8
L		 2237 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2238 sections because such sections are not SEC_ALLOC and
2239 thus ld.so will not process them. */
2240 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 2241 continue;
97dc35c8
L		 2242 abort ();
2243 }
cbe950e9
L		 2244
2245 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 2246 if (htab->elf.splt != NULL)
cbe950e9 2247 {
ee2fdd6f
L		 2248 if (htab->plt_second != NULL)
2249 {
2250 resolved_plt = htab->plt_second;
2251 plt_offset = eh->plt_second.offset;
2252 }
2253 else
2254 {
2255 resolved_plt = htab->elf.splt;
2256 plt_offset = h->plt.offset;
2257 }
6de2ae4a 2258 gotplt = htab->elf.sgotplt;
cbe950e9
L		 2259 }
2260 else
2261 {
ee2fdd6f
L		 2262 resolved_plt = htab->elf.iplt;
2263 plt_offset = h->plt.offset;
6de2ae4a 2264 gotplt = htab->elf.igotplt;
cbe950e9
L		 2265 }
2266
cbe950e9
L		 2267 switch (r_type)
2268 {
2269 default:
233cc9c1 2270 break;
cbe950e9
L		 2271
2272 case R_386_GOT32:
02a86693 2273 case R_386_GOT32X:
6de2ae4a 2274 base_got = htab->elf.sgot;
cbe950e9
L		 2275 off = h->got.offset;
2276
7afd84dc 2277 if (base_got == NULL)
cbe950e9
L		 2278 abort ();
2279
7afd84dc 2280 if (off == (bfd_vma) -1)
cbe950e9 2281 {
7afd84dc
L		 2282 /* We can't use h->got.offset here to save state, or
2283 even just remember the offset, as finish_dynamic_symbol
2284 would use that as offset into .got. */
6bbec505 2285
233cc9c1
L		 2286 if (h->plt.offset == (bfd_vma) -1)
2287 abort ();
2288
6de2ae4a 2289 if (htab->elf.splt != NULL)
7afd84dc 2290 {
f604c2a2 2291 plt_index = (h->plt.offset / plt_entry_size
765e526c 2292 - htab->plt.has_plt0);
7afd84dc 2293 off = (plt_index + 3) * 4;
6de2ae4a 2294 base_got = htab->elf.sgotplt;
7afd84dc 2295 }
cbe950e9
L		 2296 else
2297 {
25e762b9 2298 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 2299 off = plt_index * 4;
6de2ae4a 2300 base_got = htab->elf.igotplt;
7afd84dc
L		 2301 }
2302
2303 if (h->dynindx == -1
2304 || h->forced_local
2305 || info->symbolic)
2306 {
2307 /* This references the local defitionion. We must
2308 initialize this entry in the global offset table.
2309 Since the offset must always be a multiple of 8,
2310 we use the least significant bit to record
2311 whether we have initialized it already.
2312
2313 When doing a dynamic link, we create a .rela.got
2314 relocation entry to initialize the value. This
2315 is done in the finish_dynamic_symbol routine. */
2316 if ((off & 1) != 0)
2317 off &= ~1;
2318 else
2319 {
2320 bfd_put_32 (output_bfd, relocation,
2321 base_got->contents + off);
2322 h->got.offset |= 1;
2323 }
cbe950e9 2324 }
cbe950e9 2325
7afd84dc 2326 relocation = off;
7afd84dc
L		 2327 }
2328 else
ca8c86ef
L		 2329 relocation = (base_got->output_section->vma
2330 + base_got->output_offset + off
2331 - gotplt->output_section->vma
2332 - gotplt->output_offset);
2333
2a568401
L		 2334 if (rel->r_offset > 1
2335 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2336 && *(contents + rel->r_offset - 2) != 0x8d)
712ec279
L		 2337 {
2338 if (bfd_link_pic (info))
2339 goto disallow_got32;
2340
2341 /* Add the GOT base if there is no base register. */
2342 relocation += (gotplt->output_section->vma
2343 + gotplt->output_offset);
2344 }
2345 else if (htab->elf.splt == NULL)
2346 {
2347 /* Adjust for static executables. */
2348 relocation += gotplt->output_offset;
2349 }
0018b0a3 2350
cbe950e9 2351 goto do_relocation;
233cc9c1
L		 2352 }
2353
2354 if (h->plt.offset == (bfd_vma) -1)
2355 {
2356 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2357 if (r_type == R_386_32
2358 && (input_section->flags & SEC_CODE) == 0)
2359 goto do_ifunc_pointer;
2360 goto bad_ifunc_reloc;
2361 }
2362
ee2fdd6f
L		 2363 relocation = (resolved_plt->output_section->vma
2364 + resolved_plt->output_offset + plt_offset);
233cc9c1
L		 2365
2366 switch (r_type)
2367 {
2368 default:
2369bad_ifunc_reloc:
2370 if (h->root.root.string)
2371 name = h->root.root.string;
2372 else
2373 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2374 NULL);
4eca0228 2375 _bfd_error_handler
695344c0 2376 /* xgettext:c-format */
871b3ab2 2377 (_("%pB: relocation %s against STT_GNU_IFUNC "
233cc9c1
L		 2378 "symbol `%s' isn't supported"), input_bfd,
2379 howto->name, name);
2380 bfd_set_error (bfd_error_bad_value);
2381 return FALSE;
2382
2383 case R_386_32:
2384 /* Generate dynamic relcoation only when there is a
2385 non-GOT reference in a shared object. */
2386 if ((bfd_link_pic (info) && h->non_got_ref)
2387 || h->plt.offset == (bfd_vma) -1)
2388 {
2389 Elf_Internal_Rela outrel;
2390 asection *sreloc;
2391 bfd_vma offset;
2392
2393do_ifunc_pointer:
2394 /* Need a dynamic relocation to get the real function
2395 adddress. */
2396 offset = _bfd_elf_section_offset (output_bfd,
2397 info,
2398 input_section,
2399 rel->r_offset);
2400 if (offset == (bfd_vma) -1
2401 || offset == (bfd_vma) -2)
2402 abort ();
2403
2404 outrel.r_offset = (input_section->output_section->vma
2405 + input_section->output_offset
2406 + offset);
2407
cf1070f1 2408 if (POINTER_LOCAL_IFUNC_P (info, h))
233cc9c1 2409 {
871b3ab2 2410 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 2411 h->root.root.string,
2412 h->root.u.def.section->owner);
2413
233cc9c1
L		 2414 /* This symbol is resolved locally. */
2415 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2416 bfd_put_32 (output_bfd,
2417 (h->root.u.def.value
2418 + h->root.u.def.section->output_section->vma
2419 + h->root.u.def.section->output_offset),
2420 contents + offset);
2421 }
2422 else
2423 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2424
2425 /* Dynamic relocations are stored in
2426 1. .rel.ifunc section in PIC object.
2427 2. .rel.got section in dynamic executable.
2428 3. .rel.iplt section in static executable. */
2429 if (bfd_link_pic (info))
2430 sreloc = htab->elf.irelifunc;
2431 else if (htab->elf.splt != NULL)
2432 sreloc = htab->elf.srelgot;
2433 else
2434 sreloc = htab->elf.irelplt;
2435 elf_append_rel (output_bfd, sreloc, &outrel);
2436
2437 /* If this reloc is against an external symbol, we
2438 do not want to fiddle with the addend. Otherwise,
2439 we need to include the symbol value so that it
2440 becomes an addend for the dynamic reloc. For an
2441 internal symbol, we have updated addend. */
2442 continue;
2443 }
2444 /* FALLTHROUGH */
2445 case R_386_PC32:
2446 case R_386_PLT32:
2447 goto do_relocation;
cbe950e9
L		 2448
2449 case R_386_GOTOFF:
2450 relocation -= (gotplt->output_section->vma
2451 + gotplt->output_offset);
2452 goto do_relocation;
2453 }
2454 }
2455
347a8774 2456skip_ifunc:
aec6b87e 2457 resolved_to_zero = (eh != NULL
c5bce5c6 2458 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
aec6b87e 2459
252b5132
RH		 2460 switch (r_type)
2461 {
02a86693 2462 case R_386_GOT32X:
252b5132
RH		 2463 case R_386_GOT32:
2464 /* Relocation is to the entry for this symbol in the global
2465 offset table. */
6de2ae4a 2466 if (htab->elf.sgot == NULL)
ffb2e45b 2467 abort ();
252b5132 2468
e133d005 2469 relative_reloc = FALSE;
252b5132
RH		 2470 if (h != NULL)
2471 {
252b5132 2472 off = h->got.offset;
2eba97c2 2473 if (RESOLVED_LOCALLY_P (info, h, htab))
252b5132 2474 {
2eba97c2
L		 2475 /* We must initialize this entry in the global offset
2476 table. Since the offset must always be a multiple
2477 of 4, we use the least significant bit to record
2478 whether we have initialized it already.
252b5132
RH		 2479
2480 When doing a dynamic link, we create a .rel.got
2481 relocation entry to initialize the value. This
2482 is done in the finish_dynamic_symbol routine. */
2483 if ((off & 1) != 0)
2484 off &= ~1;
2485 else
2486 {
2487 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2488 htab->elf.sgot->contents + off);
252b5132 2489 h->got.offset |= 1;
e133d005 2490
f70656b2 2491 if (GENERATE_RELATIVE_RELOC_P (info, h))
e133d005
L		 2492 {
2493 /* PR ld/21402: If this symbol isn't dynamic
0dc9a308 2494 in PIC, generate R_386_RELATIVE here. */
e133d005
L		 2495 eh->no_finish_dynamic_symbol = 1;
2496 relative_reloc = TRUE;
2497 }
252b5132
RH		 2498 }
2499 }
8c694914 2500 else
b34976b6 2501 unresolved_reloc = FALSE;
252b5132
RH		 2502 }
2503 else
2504 {
ffb2e45b
AM		 2505 if (local_got_offsets == NULL)
2506 abort ();
252b5132
RH		 2507
2508 off = local_got_offsets[r_symndx];
2509
2510 /* The offset must always be a multiple of 4. We use
83be169b
AM		 2511 the least significant bit to record whether we have
2512 already generated the necessary reloc. */
252b5132
RH		 2513 if ((off & 1) != 0)
2514 off &= ~1;
2515 else
2516 {
6725bdbf 2517 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2518 htab->elf.sgot->contents + off);
e133d005 2519 local_got_offsets[r_symndx] |= 1;
252b5132 2520
0e1862bb 2521 if (bfd_link_pic (info))
e133d005 2522 relative_reloc = TRUE;
252b5132 2523 }
252b5132
RH		 2524 }
2525
e133d005
L		 2526 if (relative_reloc)
2527 {
2528 asection *s;
2529 Elf_Internal_Rela outrel;
2530
2531 s = htab->elf.srelgot;
2532 if (s == NULL)
2533 abort ();
2534
2535 outrel.r_offset = (htab->elf.sgot->output_section->vma
2536 + htab->elf.sgot->output_offset
2537 + off);
2538 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2539 elf_append_rel (output_bfd, s, &outrel);
2540 }
2541
ffb2e45b
AM		 2542 if (off >= (bfd_vma) -2)
2543 abort ();
2544
74d7f0aa
L		 2545 relocation = (htab->elf.sgot->output_section->vma
2546 + htab->elf.sgot->output_offset + off);
2a568401
L		 2547 if (rel->r_offset > 1
2548 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2549 && *(contents + rel->r_offset - 2) != 0x8d)
74d7f0aa
L		 2550 {
2551 if (bfd_link_pic (info))
2552 {
2553 /* For PIC, disallow R_386_GOT32 without a base
2a568401
L		 2554 register, except for "lea foo@GOT, %reg", since
2555 we don't know what the GOT base is. */
74d7f0aa
L		 2556 const char *name;
2557
712ec279 2558disallow_got32:
a5def14f 2559 if (h == NULL || h->root.root.string == NULL)
74d7f0aa
L		 2560 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2561 NULL);
2562 else
2563 name = h->root.root.string;
2564
4eca0228 2565 _bfd_error_handler
695344c0 2566 /* xgettext:c-format */
871b3ab2 2567 (_("%pB: direct GOT relocation %s against `%s'"
63a5468a
AM		 2568 " without base register can not be used"
2569 " when making a shared object"),
712ec279 2570 input_bfd, howto->name, name);
74d7f0aa
L		 2571 bfd_set_error (bfd_error_bad_value);
2572 return FALSE;
2573 }
2574 }
2575 else
2576 {
2577 /* Subtract the .got.plt section address only with a base
2578 register. */
2579 relocation -= (htab->elf.sgotplt->output_section->vma
2580 + htab->elf.sgotplt->output_offset);
2581 }
2582
252b5132
RH		 2583 break;
2584
2585 case R_386_GOTOFF:
2586 /* Relocation is relative to the start of the global offset
2587 table. */
2588
3d949995
L		 2589 /* Check to make sure it isn't a protected function or data
2590 symbol for shared library since it may not be local when
2591 used as function address or with copy relocation. We also
e3c0e327 2592 need to make sure that a symbol is referenced locally. */
0e1862bb 2593 if (!bfd_link_executable (info) && h)
90f487df 2594 {
41bed6dd
L		 2595 if (!h->def_regular)
2596 {
2597 const char *v;
2598
2599 switch (ELF_ST_VISIBILITY (h->other))
2600 {
2601 case STV_HIDDEN:
2602 v = _("hidden symbol");
2603 break;
2604 case STV_INTERNAL:
2605 v = _("internal symbol");
2606 break;
2607 case STV_PROTECTED:
2608 v = _("protected symbol");
2609 break;
2610 default:
2611 v = _("symbol");
2612 break;
2613 }
2614
4eca0228 2615 _bfd_error_handler
695344c0 2616 /* xgettext:c-format */
871b3ab2 2617 (_("%pB: relocation R_386_GOTOFF against undefined %s"
63a5468a 2618 " `%s' can not be used when making a shared object"),
41bed6dd
L		 2619 input_bfd, v, h->root.root.string);
2620 bfd_set_error (bfd_error_bad_value);
2621 return FALSE;
2622 }
6999821f 2623 else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
3d949995
L		 2624 && (h->type == STT_FUNC
2625 || h->type == STT_OBJECT)
41bed6dd
L		 2626 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2627 {
4eca0228 2628 _bfd_error_handler
695344c0 2629 /* xgettext:c-format */
871b3ab2 2630 (_("%pB: relocation R_386_GOTOFF against protected %s"
63a5468a 2631 " `%s' can not be used when making a shared object"),
3d949995
L		 2632 input_bfd,
2633 h->type == STT_FUNC ? "function" : "data",
2634 h->root.root.string);
41bed6dd
L		 2635 bfd_set_error (bfd_error_bad_value);
2636 return FALSE;
2637 }
90f487df
L		 2638 }
2639
8c37241b
JJ		 2640 /* Note that sgot is not involved in this
2641 calculation. We always want the start of .got.plt. If we
2642 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 2643 permitted by the ABI, we might have to change this
2644 calculation. */
6de2ae4a
L		 2645 relocation -= htab->elf.sgotplt->output_section->vma
2646 + htab->elf.sgotplt->output_offset;
252b5132
RH		 2647 break;
2648
2649 case R_386_GOTPC:
2650 /* Use global offset table as symbol value. */
6de2ae4a
L		 2651 relocation = htab->elf.sgotplt->output_section->vma
2652 + htab->elf.sgotplt->output_offset;
b34976b6 2653 unresolved_reloc = FALSE;
252b5132
RH		 2654 break;
2655
2656 case R_386_PLT32:
2657 /* Relocation is to the entry for this symbol in the
2658 procedure linkage table. */
2659
dd5724d5 2660 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 2661 without using the procedure linkage table. */
252b5132
RH		 2662 if (h == NULL)
2663 break;
2664
dd7e64d4
L		 2665 if ((h->plt.offset == (bfd_vma) -1
2666 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 2667 || htab->elf.splt == NULL)
252b5132
RH		 2668 {
2669 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 2670 happens when statically linking PIC code, or when
2671 using -Bsymbolic. */
252b5132
RH		 2672 break;
2673 }
2674
dd7e64d4
L		 2675 if (h->plt.offset != (bfd_vma) -1)
2676 {
ee2fdd6f
L		 2677 if (htab->plt_second != NULL)
2678 {
2679 resolved_plt = htab->plt_second;
2680 plt_offset = eh->plt_second.offset;
2681 }
2682 else
2683 {
2684 resolved_plt = htab->elf.splt;
2685 plt_offset = h->plt.offset;
2686 }
dd7e64d4
L		 2687 }
2688 else
2689 {
2690 resolved_plt = htab->plt_got;
2691 plt_offset = eh->plt_got.offset;
2692 }
2693
2694 relocation = (resolved_plt->output_section->vma
2695 + resolved_plt->output_offset
2696 + plt_offset);
b34976b6 2697 unresolved_reloc = FALSE;
252b5132
RH		 2698 break;
2699
1788fc08 2700 case R_386_SIZE32:
1788fc08
L		 2701 /* Set to symbol size. */
2702 relocation = st_size;
2703 /* Fall through. */
2704
252b5132
RH		 2705 case R_386_32:
2706 case R_386_PC32:
3348747a
NS		 2707 if ((input_section->flags & SEC_ALLOC) == 0
2708 || is_vxworks_tls)
ec338859
AM		 2709 break;
2710
aebcc8ff
L		 2711 if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type,
2712 FALSE, resolved_to_zero,
2713 (r_type == R_386_PC32)))
252b5132 2714 {
947216bf 2715 Elf_Internal_Rela outrel;
b34976b6 2716 bfd_boolean skip, relocate;
0c715baa 2717 asection *sreloc;
252b5132
RH		 2718
2719 /* When generating a shared object, these relocations
2720 are copied into the output file to be resolved at run
2721 time. */
2722
b34976b6
AM		 2723 skip = FALSE;
2724 relocate = FALSE;
252b5132 2725
c629eae0
JJ		 2726 outrel.r_offset =
2727 _bfd_elf_section_offset (output_bfd, info, input_section,
2728 rel->r_offset);
2729 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2730 skip = TRUE;
0bb2d96a 2731 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2732 skip = TRUE, relocate = TRUE;
252b5132
RH		 2733 outrel.r_offset += (input_section->output_section->vma
2734 + input_section->output_offset);
2735
2736 if (skip)
0bb2d96a 2737 memset (&outrel, 0, sizeof outrel);
e74399c4 2738 else if (COPY_INPUT_RELOC_P (info, h, r_type))
0bb2d96a 2739 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2740 else
2741 {
5a15f56f 2742 /* This symbol is local, or marked to become local. */
b34976b6 2743 relocate = TRUE;
5a15f56f 2744 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 2745 }
2746
cbe950e9 2747 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 2748
62d78908
L		 2749 if (sreloc == NULL || sreloc->contents == NULL)
2750 {
2751 r = bfd_reloc_notsupported;
2752 goto check_relocation_error;
2753 }
0c715baa 2754
59d6ffb2 2755 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 2756
2757 /* If this reloc is against an external symbol, we do
2758 not want to fiddle with the addend. Otherwise, we
2759 need to include the symbol value so that it becomes
2760 an addend for the dynamic reloc. */
0f88be7a 2761 if (! relocate)
252b5132
RH		 2762 continue;
2763 }
252b5132
RH		 2764 break;
2765
37e55690 2766 case R_386_TLS_IE:
0e1862bb 2767 if (!bfd_link_executable (info))
37e55690 2768 {
947216bf 2769 Elf_Internal_Rela outrel;
37e55690 2770 asection *sreloc;
37e55690
JJ		 2771
2772 outrel.r_offset = rel->r_offset
2773 + input_section->output_section->vma
2774 + input_section->output_offset;
2775 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2776 sreloc = elf_section_data (input_section)->sreloc;
2777 if (sreloc == NULL)
2778 abort ();
59d6ffb2 2779 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 2780 }
2781 /* Fall through */
2782
13ae64f3 2783 case R_386_TLS_GD:
67a4f2b7
AO		 2784 case R_386_TLS_GOTDESC:
2785 case R_386_TLS_DESC_CALL:
13ae64f3 2786 case R_386_TLS_IE_32:
37e55690 2787 case R_386_TLS_GOTIE:
13ae64f3
JJ		 2788 tls_type = GOT_UNKNOWN;
2789 if (h == NULL && local_got_offsets)
0afcef53 2790 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
13ae64f3 2791 else if (h != NULL)
0afcef53 2792 tls_type = elf_x86_hash_entry(h)->tls_type;
37e55690
JJ		 2793 if (tls_type == GOT_TLS_IE)
2794 tls_type = GOT_TLS_IE_NEG;
142411ca 2795
419414ea 2796 r_type_tls = r_type;
142411ca
L		 2797 if (! elf_i386_tls_transition (info, input_bfd,
2798 input_section, contents,
2799 symtab_hdr, sym_hashes,
419414ea 2800 &r_type_tls, tls_type, rel,
bedfd056 2801 relend, h, r_symndx, TRUE))
142411ca 2802 return FALSE;
13ae64f3 2803
419414ea 2804 if (r_type_tls == R_386_TLS_LE_32)
13ae64f3 2805 {
82e51918 2806 BFD_ASSERT (! unresolved_reloc);
419414ea 2807 if (r_type == R_386_TLS_GD)
13ae64f3 2808 {
142411ca 2809 unsigned int type;
13ae64f3
JJ		 2810 bfd_vma roff;
2811
2812 /* GD->LE transition. */
6eaa7fb5 2813 type = *(contents + rel->r_offset - 2);
13ae64f3
JJ		 2814 if (type == 0x04)
2815 {
6eaa7fb5
L		 2816 /* Change
2817 leal foo@tlsgd(,%ebx,1), %eax
2818 call ___tls_get_addr@PLT
2819 into:
2820 movl %gs:0, %eax
2821 subl $foo@tpoff, %eax
13ae64f3 2822 (6 byte form of subl). */
142411ca 2823 roff = rel->r_offset + 5;
13ae64f3
JJ		 2824 }
2825 else
2826 {
6eaa7fb5
L		 2827 /* Change
2828 leal foo@tlsgd(%ebx), %eax
2829 call ___tls_get_addr@PLT
2830 nop
2831 or
2832 leal foo@tlsgd(%reg), %eax
2833 call *___tls_get_addr@GOT(%reg)
2834 which may be converted to
2835 addr32 call ___tls_get_addr
2836 into:
2837 movl %gs:0, %eax; subl $foo@tpoff, %eax
142411ca 2838 (6 byte form of subl). */
142411ca 2839 roff = rel->r_offset + 6;
13ae64f3 2840 }
6eaa7fb5
L		 2841 memcpy (contents + roff - 8,
2842 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
eb4ff4d6 2843 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 2844 contents + roff);
6eaa7fb5 2845 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
13ae64f3 2846 rel++;
60f2e42e 2847 wrel++;
13ae64f3
JJ		 2848 continue;
2849 }
419414ea 2850 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 2851 {
2852 /* GDesc -> LE transition.
2853 It's originally something like:
2854 leal x@tlsdesc(%ebx), %eax
2855
2856 leal x@ntpoff, %eax
2857
2858 Registers other than %eax may be set up here. */
2859
142411ca 2860 unsigned int val;
67a4f2b7
AO		 2861 bfd_vma roff;
2862
67a4f2b7 2863 roff = rel->r_offset;
67a4f2b7 2864 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 2865
2866 /* Now modify the instruction as appropriate. */
2867 /* aoliva FIXME: remove the above and xor the byte
2868 below with 0x86. */
2869 bfd_put_8 (output_bfd, val ^ 0x86,
2870 contents + roff - 1);
eb4ff4d6 2871 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 2872 contents + roff);
2873 continue;
2874 }
419414ea 2875 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 2876 {
2877 /* GDesc -> LE transition.
2878 It's originally:
2879 call *(%eax)
2880 Turn it into:
142411ca 2881 xchg %ax,%ax */
67a4f2b7 2882
67a4f2b7 2883 bfd_vma roff;
6bbec505 2884
67a4f2b7 2885 roff = rel->r_offset;
10efb593 2886 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 2887 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2888 continue;
2889 }
419414ea 2890 else if (r_type == R_386_TLS_IE)
13ae64f3 2891 {
142411ca 2892 unsigned int val;
13ae64f3
JJ		 2893
2894 /* IE->LE transition:
37e55690
JJ		 2895 Originally it can be one of:
2896 movl foo, %eax
2897 movl foo, %reg
2898 addl foo, %reg
2899 We change it into:
2900 movl $foo, %eax
2901 movl $foo, %reg
2902 addl $foo, %reg. */
37e55690 2903 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 2904 if (val == 0xa1)
2905 {
2906 /* movl foo, %eax. */
55fd94b0
AM		 2907 bfd_put_8 (output_bfd, 0xb8,
2908 contents + rel->r_offset - 1);
37e55690 2909 }
299bf759 2910 else
37e55690 2911 {
142411ca
L		 2912 unsigned int type;
2913
55fd94b0
AM		 2914 type = bfd_get_8 (input_bfd,
2915 contents + rel->r_offset - 2);
299bf759 2916 switch (type)
26e41594 2917 {
299bf759
L		 2918 case 0x8b:
2919 /* movl */
299bf759
L		 2920 bfd_put_8 (output_bfd, 0xc7,
2921 contents + rel->r_offset - 2);
2922 bfd_put_8 (output_bfd,
2923 0xc0 | ((val >> 3) & 7),
2924 contents + rel->r_offset - 1);
2925 break;
2926 case 0x03:
2927 /* addl */
299bf759
L		 2928 bfd_put_8 (output_bfd, 0x81,
2929 contents + rel->r_offset - 2);
2930 bfd_put_8 (output_bfd,
2931 0xc0 | ((val >> 3) & 7),
2932 contents + rel->r_offset - 1);
2933 break;
2934 default:
2935 BFD_FAIL ();
2936 break;
26e41594 2937 }
37e55690 2938 }
eb4ff4d6 2939 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 2940 contents + rel->r_offset);
2941 continue;
2942 }
2943 else
2944 {
2945 unsigned int val, type;
2946
2947 /* {IE_32,GOTIE}->LE transition:
2948 Originally it can be one of:
13ae64f3 2949 subl foo(%reg1), %reg2
13ae64f3 2950 movl foo(%reg1), %reg2
37e55690 2951 addl foo(%reg1), %reg2
13ae64f3
JJ		 2952 We change it into:
2953 subl $foo, %reg2
37e55690
JJ		 2954 movl $foo, %reg2 (6 byte form)
2955 addl $foo, %reg2. */
13ae64f3
JJ		 2956 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2957 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 2958 if (type == 0x8b)
2959 {
2960 /* movl */
13ae64f3
JJ		 2961 bfd_put_8 (output_bfd, 0xc7,
2962 contents + rel->r_offset - 2);
2963 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2964 contents + rel->r_offset - 1);
2965 }
2966 else if (type == 0x2b)
2967 {
2968 /* subl */
13ae64f3
JJ		 2969 bfd_put_8 (output_bfd, 0x81,
2970 contents + rel->r_offset - 2);
2971 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2972 contents + rel->r_offset - 1);
2973 }
37e55690
JJ		 2974 else if (type == 0x03)
2975 {
2976 /* addl */
2977 bfd_put_8 (output_bfd, 0x81,
2978 contents + rel->r_offset - 2);
2979 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2980 contents + rel->r_offset - 1);
2981 }
13ae64f3
JJ		 2982 else
2983 BFD_FAIL ();
419414ea 2984 if (r_type == R_386_TLS_GOTIE)
eb4ff4d6 2985 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 2986 contents + rel->r_offset);
2987 else
eb4ff4d6 2988 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 2989 contents + rel->r_offset);
13ae64f3
JJ		 2990 continue;
2991 }
2992 }
2993
6de2ae4a 2994 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 2995 abort ();
2996
2997 if (h != NULL)
67a4f2b7
AO		 2998 {
2999 off = h->got.offset;
0afcef53 3000 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
67a4f2b7 3001 }
13ae64f3
JJ		 3002 else
3003 {
3004 if (local_got_offsets == NULL)
3005 abort ();
3006
3007 off = local_got_offsets[r_symndx];
67a4f2b7 3008 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 3009 }
3010
3011 if ((off & 1) != 0)
3012 off &= ~1;
26e41594 3013 else
13ae64f3 3014 {
947216bf 3015 Elf_Internal_Rela outrel;
91d6fa6a 3016 int dr_type;
67a4f2b7 3017 asection *sreloc;
13ae64f3 3018
6de2ae4a 3019 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3020 abort ();
3021
67a4f2b7
AO		 3022 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3023
3024 if (GOT_TLS_GDESC_P (tls_type))
3025 {
59d6ffb2 3026 bfd_byte *loc;
67a4f2b7
AO		 3027 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3028 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 3029 <= htab->elf.sgotplt->size);
3030 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3031 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 3032 + offplt
3033 + htab->sgotplt_jump_table_size);
6de2ae4a 3034 sreloc = htab->elf.srelplt;
67a4f2b7 3035 loc = sreloc->contents;
765e526c 3036 loc += (htab->next_tls_desc_index++
5ae0bfb6 3037 * sizeof (Elf32_External_Rel));
67a4f2b7 3038 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 3039 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 3040 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3041 if (indx == 0)
3042 {
3043 BFD_ASSERT (! unresolved_reloc);
3044 bfd_put_32 (output_bfd,
0afcef53 3045 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3046 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3047 + htab->sgotplt_jump_table_size + 4);
3048 }
3049 else
3050 {
3051 bfd_put_32 (output_bfd, 0,
6de2ae4a 3052 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3053 + htab->sgotplt_jump_table_size + 4);
3054 }
3055 }
3056
6de2ae4a 3057 sreloc = htab->elf.srelgot;
67a4f2b7 3058
6de2ae4a
L		 3059 outrel.r_offset = (htab->elf.sgot->output_section->vma
3060 + htab->elf.sgot->output_offset + off);
13ae64f3 3061
67a4f2b7 3062 if (GOT_TLS_GD_P (tls_type))
13ae64f3 3063 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 3064 else if (GOT_TLS_GDESC_P (tls_type))
3065 goto dr_done;
37e55690
JJ		 3066 else if (tls_type == GOT_TLS_IE_POS)
3067 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 3068 else
3069 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 3070
37e55690 3071 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6 3072 bfd_put_32 (output_bfd,
0afcef53 3073 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3074 htab->elf.sgot->contents + off);
37e55690 3075 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 3076 bfd_put_32 (output_bfd,
0afcef53 3077 _bfd_x86_elf_dtpoff_base (info) - relocation,
6de2ae4a 3078 htab->elf.sgot->contents + off);
67a4f2b7 3079 else if (dr_type != R_386_TLS_DESC)
c366c25e 3080 bfd_put_32 (output_bfd, 0,
6de2ae4a 3081 htab->elf.sgot->contents + off);
13ae64f3 3082 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 3083
59d6ffb2 3084 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 3085
67a4f2b7 3086 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 3087 {
3088 if (indx == 0)
3089 {
07d6d2b8 3090 BFD_ASSERT (! unresolved_reloc);
13ae64f3 3091 bfd_put_32 (output_bfd,
0afcef53 3092 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3093 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3094 }
3095 else
3096 {
3097 bfd_put_32 (output_bfd, 0,
6de2ae4a 3098 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3099 outrel.r_info = ELF32_R_INFO (indx,
3100 R_386_TLS_DTPOFF32);
3101 outrel.r_offset += 4;
59d6ffb2 3102 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 3103 }
3104 }
37e55690
JJ		 3105 else if (tls_type == GOT_TLS_IE_BOTH)
3106 {
3107 bfd_put_32 (output_bfd,
eb4ff4d6 3108 (indx == 0
0afcef53 3109 ? relocation - _bfd_x86_elf_dtpoff_base (info)
eb4ff4d6 3110 : 0),
6de2ae4a 3111 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 3112 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3113 outrel.r_offset += 4;
59d6ffb2 3114 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 3115 }
13ae64f3 3116
67a4f2b7 3117 dr_done:
13ae64f3
JJ		 3118 if (h != NULL)
3119 h->got.offset |= 1;
3120 else
3121 local_got_offsets[r_symndx] |= 1;
3122 }
3123
67a4f2b7
AO		 3124 if (off >= (bfd_vma) -2
3125 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 3126 abort ();
419414ea
L		 3127 if (r_type_tls == R_386_TLS_GOTDESC
3128 || r_type_tls == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3129 {
3130 relocation = htab->sgotplt_jump_table_size + offplt;
3131 unresolved_reloc = FALSE;
3132 }
419414ea 3133 else if (r_type_tls == r_type)
13ae64f3 3134 {
6de2ae4a
L		 3135 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3136 + htab->elf.sgotplt->output_offset;
3137 relocation = htab->elf.sgot->output_section->vma
3138 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 3139 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3140 && tls_type == GOT_TLS_IE_BOTH)
3141 relocation += 4;
3142 if (r_type == R_386_TLS_IE)
8c37241b 3143 relocation += g_o_t;
b34976b6 3144 unresolved_reloc = FALSE;
13ae64f3 3145 }
419414ea 3146 else if (r_type == R_386_TLS_GD)
13ae64f3
JJ		 3147 {
3148 unsigned int val, type;
3149 bfd_vma roff;
3150
3151 /* GD->IE transition. */
6eaa7fb5
L		 3152 type = *(contents + rel->r_offset - 2);
3153 val = *(contents + rel->r_offset - 1);
13ae64f3
JJ		 3154 if (type == 0x04)
3155 {
6eaa7fb5
L		 3156 /* Change
3157 leal foo@tlsgd(,%ebx,1), %eax
3158 call ___tls_get_addr@PLT
3159 into:
3160 movl %gs:0, %eax
3161 subl $foo@gottpoff(%ebx), %eax. */
13ae64f3 3162 val >>= 3;
142411ca 3163 roff = rel->r_offset - 3;
13ae64f3
JJ		 3164 }
3165 else
3166 {
6eaa7fb5
L		 3167 /* Change
3168 leal foo@tlsgd(%ebx), %eax
3169 call ___tls_get_addr@PLT
3170 nop
3171 or
3172 leal foo@tlsgd(%reg), %eax
3173 call *___tls_get_addr@GOT(%reg)
3174 which may be converted to
3175 addr32 call ___tls_get_addr
3176 into:
3177 movl %gs:0, %eax;
3178 subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 3179 roff = rel->r_offset - 2;
3180 }
3181 memcpy (contents + roff,
3182 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3183 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 3184 /* If foo is used only with foo@gotntpoff(%reg) and
3185 foo@indntpoff, but not with foo@gottpoff(%reg), change
3186 subl $foo@gottpoff(%reg), %eax
3187 into:
3188 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 3189 if (tls_type == GOT_TLS_IE_POS)
3190 contents[roff + 6] = 0x03;
8c37241b 3191 bfd_put_32 (output_bfd,
6de2ae4a
L		 3192 htab->elf.sgot->output_section->vma
3193 + htab->elf.sgot->output_offset + off
3194 - htab->elf.sgotplt->output_section->vma
3195 - htab->elf.sgotplt->output_offset,
13ae64f3 3196 contents + roff + 8);
6eaa7fb5 3197 /* Skip R_386_PLT32 and R_386_GOT32X. */
13ae64f3 3198 rel++;
60f2e42e 3199 wrel++;
13ae64f3
JJ		 3200 continue;
3201 }
419414ea 3202 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 3203 {
3204 /* GDesc -> IE transition.
3205 It's originally something like:
3206 leal x@tlsdesc(%ebx), %eax
3207
3208 Change it to:
142411ca 3209 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 3210 or:
3211 movl x@gottpoff(%ebx), %eax # before negl %eax
3212
3213 Registers other than %eax may be set up here. */
3214
67a4f2b7
AO		 3215 bfd_vma roff;
3216
3217 /* First, make sure it's a leal adding ebx to a 32-bit
3218 offset into any register, although it's probably
3219 almost always going to be eax. */
3220 roff = rel->r_offset;
67a4f2b7
AO		 3221
3222 /* Now modify the instruction as appropriate. */
3223 /* To turn a leal into a movl in the form we use it, it
3224 suffices to change the first byte from 0x8d to 0x8b.
3225 aoliva FIXME: should we decide to keep the leal, all
3226 we have to do is remove the statement below, and
3227 adjust the relaxation of R_386_TLS_DESC_CALL. */
3228 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3229
3230 if (tls_type == GOT_TLS_IE_BOTH)
3231 off += 4;
3232
3233 bfd_put_32 (output_bfd,
6de2ae4a
L		 3234 htab->elf.sgot->output_section->vma
3235 + htab->elf.sgot->output_offset + off
3236 - htab->elf.sgotplt->output_section->vma
3237 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 3238 contents + roff);
3239 continue;
3240 }
419414ea 3241 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3242 {
3243 /* GDesc -> IE transition.
3244 It's originally:
3245 call *(%eax)
3246
3247 Change it to:
142411ca 3248 xchg %ax,%ax
67a4f2b7
AO		 3249 or
3250 negl %eax
3251 depending on how we transformed the TLS_GOTDESC above.
3252 */
3253
67a4f2b7
AO		 3254 bfd_vma roff;
3255
67a4f2b7 3256 roff = rel->r_offset;
67a4f2b7
AO		 3257
3258 /* Now modify the instruction as appropriate. */
3259 if (tls_type != GOT_TLS_IE_NEG)
3260 {
10efb593
L		 3261 /* xchg %ax,%ax */
3262 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3263 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3264 }
3265 else
3266 {
3267 /* negl %eax */
3268 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3269 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3270 }
3271
3272 continue;
3273 }
3274 else
3275 BFD_ASSERT (FALSE);
13ae64f3
JJ		 3276 break;
3277
3278 case R_386_TLS_LDM:
142411ca
L		 3279 if (! elf_i386_tls_transition (info, input_bfd,
3280 input_section, contents,
3281 symtab_hdr, sym_hashes,
3282 &r_type, GOT_UNKNOWN, rel,
bedfd056 3283 relend, h, r_symndx, TRUE))
142411ca 3284 return FALSE;
13ae64f3 3285
142411ca
L		 3286 if (r_type != R_386_TLS_LDM)
3287 {
6eaa7fb5
L		 3288 /* LD->LE transition. Change
3289 leal foo@tlsldm(%ebx) %eax
3290 call ___tls_get_addr@PLT
3291 into:
3292 movl %gs:0, %eax
3293 nop
3294 leal 0(%esi,1), %esi
3295 or change
3296 leal foo@tlsldm(%reg) %eax
3297 call *___tls_get_addr@GOT(%reg)
3298 which may be converted to
3299 addr32 call ___tls_get_addr
3300 into:
3301 movl %gs:0, %eax
3302 leal 0(%esi), %esi */
142411ca 3303 BFD_ASSERT (r_type == R_386_TLS_LE_32);
6eaa7fb5
L		 3304 if (*(contents + rel->r_offset + 4) == 0xff
3305 || *(contents + rel->r_offset + 4) == 0x67)
3306 memcpy (contents + rel->r_offset - 2,
3307 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3308 else
3309 memcpy (contents + rel->r_offset - 2,
3310 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 3311 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 3312 rel++;
60f2e42e 3313 wrel++;
13ae64f3
JJ		 3314 continue;
3315 }
3316
6de2ae4a 3317 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 3318 abort ();
3319
0afcef53 3320 off = htab->tls_ld_or_ldm_got.offset;
13ae64f3
JJ		 3321 if (off & 1)
3322 off &= ~1;
3323 else
3324 {
947216bf 3325 Elf_Internal_Rela outrel;
13ae64f3 3326
6de2ae4a 3327 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3328 abort ();
3329
6de2ae4a
L		 3330 outrel.r_offset = (htab->elf.sgot->output_section->vma
3331 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 3332
3333 bfd_put_32 (output_bfd, 0,
6de2ae4a 3334 htab->elf.sgot->contents + off);
13ae64f3 3335 bfd_put_32 (output_bfd, 0,
6de2ae4a 3336 htab->elf.sgot->contents + off + 4);
13ae64f3 3337 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 3338 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
0afcef53 3339 htab->tls_ld_or_ldm_got.offset |= 1;
13ae64f3 3340 }
6de2ae4a
L		 3341 relocation = htab->elf.sgot->output_section->vma
3342 + htab->elf.sgot->output_offset + off
3343 - htab->elf.sgotplt->output_section->vma
3344 - htab->elf.sgotplt->output_offset;
b34976b6 3345 unresolved_reloc = FALSE;
13ae64f3
JJ		 3346 break;
3347
3348 case R_386_TLS_LDO_32:
0e1862bb
L		 3349 if (!bfd_link_executable (info)
3350 || (input_section->flags & SEC_CODE) == 0)
0afcef53 3351 relocation -= _bfd_x86_elf_dtpoff_base (info);
13ae64f3
JJ		 3352 else
3353 /* When converting LDO to LE, we must negate. */
eb4ff4d6 3354 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3355 break;
3356
3357 case R_386_TLS_LE_32:
13ae64f3 3358 case R_386_TLS_LE:
0e1862bb 3359 if (!bfd_link_executable (info))
37e55690 3360 {
947216bf 3361 Elf_Internal_Rela outrel;
37e55690 3362 asection *sreloc;
37e55690
JJ		 3363
3364 outrel.r_offset = rel->r_offset
3365 + input_section->output_section->vma
3366 + input_section->output_offset;
3367 if (h != NULL && h->dynindx != -1)
3368 indx = h->dynindx;
3369 else
3370 indx = 0;
3371 if (r_type == R_386_TLS_LE_32)
3372 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3373 else
3374 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3375 sreloc = elf_section_data (input_section)->sreloc;
3376 if (sreloc == NULL)
3377 abort ();
59d6ffb2 3378 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 3379 if (indx)
3380 continue;
3381 else if (r_type == R_386_TLS_LE_32)
0afcef53 3382 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
37e55690 3383 else
0afcef53 3384 relocation -= _bfd_x86_elf_dtpoff_base (info);
37e55690
JJ		 3385 }
3386 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 3387 relocation = elf_i386_tpoff (info, relocation);
37e55690 3388 else
eb4ff4d6 3389 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3390 break;
3391
252b5132
RH		 3392 default:
3393 break;
3394 }
3395
239e1f3a
AM		 3396 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3397 because such sections are not SEC_ALLOC and thus ld.so will
3398 not process them. */
8c694914 3399 if (unresolved_reloc
239e1f3a 3400 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 3401 && h->def_dynamic)
3402 && _bfd_elf_section_offset (output_bfd, info, input_section,
3403 rel->r_offset) != (bfd_vma) -1)
6a30718d 3404 {
4eca0228 3405 _bfd_error_handler
695344c0 3406 /* xgettext:c-format */
2dcf00ce 3407 (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3408 input_bfd,
3409 input_section,
2dcf00ce 3410 (uint64_t) rel->r_offset,
843fe662 3411 howto->name,
6a30718d 3412 h->root.root.string);
b34976b6 3413 return FALSE;
6a30718d 3414 }
83be169b 3415
cbe950e9 3416do_relocation:
252b5132
RH		 3417 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3418 contents, rel->r_offset,
55fd94b0 3419 relocation, 0);
252b5132 3420
62d78908 3421check_relocation_error:
cf5c0c5b 3422 if (r != bfd_reloc_ok)
252b5132 3423 {
cf5c0c5b 3424 const char *name;
ffb2e45b 3425
cf5c0c5b
AM		 3426 if (h != NULL)
3427 name = h->root.root.string;
3428 else
3429 {
3430 name = bfd_elf_string_from_elf_section (input_bfd,
3431 symtab_hdr->sh_link,
3432 sym->st_name);
3433 if (name == NULL)
b34976b6 3434 return FALSE;
cf5c0c5b
AM		 3435 if (*name == '\0')
3436 name = bfd_section_name (input_bfd, sec);
3437 }
ffb2e45b 3438
cf5c0c5b 3439 if (r == bfd_reloc_overflow)
1a72702b
AM		 3440 (*info->callbacks->reloc_overflow)
3441 (info, (h ? &h->root : NULL), name, howto->name,
3442 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
cf5c0c5b
AM		 3443 else
3444 {
4eca0228 3445 _bfd_error_handler
695344c0 3446 /* xgettext:c-format */
2dcf00ce 3447 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
d003868e 3448 input_bfd, input_section,
2dcf00ce 3449 (uint64_t) rel->r_offset, name, (int) r);
b34976b6 3450 return FALSE;
cf5c0c5b 3451 }
252b5132 3452 }
60f2e42e
L		 3453
3454 if (wrel != rel)
3455 *wrel = *rel;
3456 }
3457
3458 if (wrel != rel)
3459 {
3460 Elf_Internal_Shdr *rel_hdr;
3461 size_t deleted = rel - wrel;
3462
3463 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3464 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3465 if (rel_hdr->sh_size == 0)
3466 {
3467 /* It is too late to remove an empty reloc section. Leave
3468 one NONE reloc.
3469 ??? What is wrong with an empty section??? */
3470 rel_hdr->sh_size = rel_hdr->sh_entsize;
3471 deleted -= 1;
3472 }
3473 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3474 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3475 input_section->reloc_count -= deleted;
252b5132
RH		 3476 }
3477
b34976b6 3478 return TRUE;
252b5132
RH		 3479}
3480
3481/* Finish up dynamic symbol handling. We set the contents of various
3482 dynamic sections here. */
3483
b34976b6 3484static bfd_boolean
55fd94b0
AM		 3485elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3486 struct bfd_link_info *info,
3487 struct elf_link_hash_entry *h,
3488 Elf_Internal_Sym *sym)
252b5132 3489{
0afcef53 3490 struct elf_x86_link_hash_table *htab;
25e762b9 3491 unsigned plt_entry_size;
0afcef53 3492 struct elf_x86_link_hash_entry *eh;
aec6b87e 3493 bfd_boolean local_undefweak;
ee2fdd6f 3494 bfd_boolean use_plt_second;
252b5132 3495
0afcef53 3496 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 3497 if (htab == NULL)
3498 return FALSE;
252b5132 3499
765e526c 3500 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 3501
ee2fdd6f
L		 3502 /* Use the second PLT section only if there is .plt section. */
3503 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3504
0afcef53 3505 eh = (struct elf_x86_link_hash_entry *) h;
e133d005
L		 3506 if (eh->no_finish_dynamic_symbol)
3507 abort ();
dd7e64d4 3508
aec6b87e
L		 3509 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3510 resolved undefined weak symbols in executable so that their
3511 references have value 0 at run-time. */
c5bce5c6 3512 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
aec6b87e 3513
252b5132
RH		 3514 if (h->plt.offset != (bfd_vma) -1)
3515 {
ee2fdd6f 3516 bfd_vma plt_index, plt_offset;
252b5132 3517 bfd_vma got_offset;
947216bf
AM		 3518 Elf_Internal_Rela rel;
3519 bfd_byte *loc;
ee2fdd6f 3520 asection *plt, *resolved_plt, *gotplt, *relplt;
cbe950e9
L		 3521
3522 /* When building a static executable, use .iplt, .igot.plt and
3523 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 3524 if (htab->elf.splt != NULL)
cbe950e9 3525 {
6de2ae4a
L		 3526 plt = htab->elf.splt;
3527 gotplt = htab->elf.sgotplt;
3528 relplt = htab->elf.srelplt;
cbe950e9
L		 3529 }
3530 else
3531 {
6de2ae4a
L		 3532 plt = htab->elf.iplt;
3533 gotplt = htab->elf.igotplt;
3534 relplt = htab->elf.irelplt;
cbe950e9 3535 }
252b5132 3536
f3180fa9 3537 VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
252b5132
RH		 3538
3539 /* Get the index in the procedure linkage table which
3540 corresponds to this symbol. This is the index of this symbol
3541 in all the symbols for which we are making plt entries. The
cbe950e9 3542 first entry in the procedure linkage table is reserved.
252b5132 3543
cbe950e9 3544 Get the offset into the .got table of the entry that
252b5132 3545 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 3546 The first three are reserved.
6bbec505 3547
cbe950e9
L		 3548 For static executables, we don't reserve anything. */
3549
6de2ae4a 3550 if (plt == htab->elf.splt)
cbe950e9 3551 {
f604c2a2 3552 got_offset = (h->plt.offset / plt_entry_size
765e526c 3553 - htab->plt.has_plt0);
e1f98742 3554 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 3555 }
3556 else
3557 {
e1f98742
L		 3558 got_offset = h->plt.offset / plt_entry_size;
3559 got_offset = got_offset * 4;
cbe950e9 3560 }
252b5132 3561
f604c2a2
L		 3562 /* Fill in the entry in the procedure linkage table and update
3563 the first slot. */
765e526c 3564 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
f604c2a2 3565 plt_entry_size);
ee2fdd6f
L		 3566
3567 if (use_plt_second)
3568 {
3569 const bfd_byte *plt_entry;
3570 if (bfd_link_pic (info))
765e526c 3571 plt_entry = htab->non_lazy_plt->pic_plt_entry;
ee2fdd6f 3572 else
765e526c 3573 plt_entry = htab->non_lazy_plt->plt_entry;
ee2fdd6f 3574 memcpy (htab->plt_second->contents + eh->plt_second.offset,
765e526c 3575 plt_entry, htab->non_lazy_plt->plt_entry_size);
ee2fdd6f
L		 3576
3577 resolved_plt = htab->plt_second;
3578 plt_offset = eh->plt_second.offset;
3579 }
3580 else
3581 {
3582 resolved_plt = plt;
3583 plt_offset = h->plt.offset;
3584 }
3585
0e1862bb 3586 if (! bfd_link_pic (info))
252b5132 3587 {
252b5132 3588 bfd_put_32 (output_bfd,
cbe950e9
L		 3589 (gotplt->output_section->vma
3590 + gotplt->output_offset
252b5132 3591 + got_offset),
ee2fdd6f 3592 resolved_plt->contents + plt_offset
07d6d2b8 3593 + htab->plt.plt_got_offset);
eac338cf 3594
851b6fa1 3595 if (htab->target_os == is_vxworks)
eac338cf
PB		 3596 {
3597 int s, k, reloc_index;
3598
3599 /* Create the R_386_32 relocation referencing the GOT
3600 for this PLT entry. */
3601
3602 /* S: Current slot number (zero-based). */
765e526c 3603 s = ((h->plt.offset - htab->plt.plt_entry_size)
07d6d2b8 3604 / htab->plt.plt_entry_size);
eac338cf 3605 /* K: Number of relocations for PLTResolve. */
0e1862bb 3606 if (bfd_link_pic (info))
eac338cf
PB		 3607 k = PLTRESOLVE_RELOCS_SHLIB;
3608 else
3609 k = PLTRESOLVE_RELOCS;
3610 /* Skip the PLTresolve relocations, and the relocations for
3611 the other PLT slots. */
3612 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
765e526c 3613 loc = (htab->srelplt2->contents + reloc_index
eac338cf
PB		 3614 * sizeof (Elf32_External_Rel));
3615
ee2fdd6f
L		 3616 rel.r_offset = (plt->output_section->vma
3617 + plt->output_offset
eac338cf 3618 + h->plt.offset + 2),
7325306f 3619 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3620 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3621
3622 /* Create the R_386_32 relocation referencing the beginning of
3623 the PLT for this GOT entry. */
6de2ae4a
L		 3624 rel.r_offset = (htab->elf.sgotplt->output_section->vma
3625 + htab->elf.sgotplt->output_offset
eac338cf 3626 + got_offset);
7325306f 3627 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 3628 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 3629 loc + sizeof (Elf32_External_Rel));
eac338cf 3630 }
252b5132
RH		 3631 }
3632 else
3633 {
252b5132 3634 bfd_put_32 (output_bfd, got_offset,
ee2fdd6f 3635 resolved_plt->contents + plt_offset
07d6d2b8 3636 + htab->plt.plt_got_offset);
252b5132
RH		 3637 }
3638
aec6b87e
L		 3639 /* Fill in the entry in the global offset table. Leave the entry
3640 as zero for undefined weak symbol in PIE. No PLT relocation
3641 against undefined weak symbol in PIE. */
3642 if (!local_undefweak)
cbe950e9 3643 {
765e526c 3644 if (htab->plt.has_plt0)
f604c2a2
L		 3645 bfd_put_32 (output_bfd,
3646 (plt->output_section->vma
3647 + plt->output_offset
3648 + h->plt.offset
765e526c 3649 + htab->lazy_plt->plt_lazy_offset),
f604c2a2 3650 gotplt->contents + got_offset);
252b5132 3651
aec6b87e
L		 3652 /* Fill in the entry in the .rel.plt section. */
3653 rel.r_offset = (gotplt->output_section->vma
3654 + gotplt->output_offset
3655 + got_offset);
cf1070f1 3656 if (PLT_LOCAL_IFUNC_P (info, h))
aec6b87e 3657 {
871b3ab2 3658 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 3659 h->root.root.string,
3660 h->root.u.def.section->owner);
3661
aec6b87e
L		 3662 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3663 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3664 in the .got.plt section. */
3665 bfd_put_32 (output_bfd,
3666 (h->root.u.def.value
3667 + h->root.u.def.section->output_section->vma
3668 + h->root.u.def.section->output_offset),
3669 gotplt->contents + got_offset);
3670 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3671 /* R_386_IRELATIVE comes last. */
3672 plt_index = htab->next_irelative_index--;
3673 }
3674 else
3675 {
3676 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3677 plt_index = htab->next_jump_slot_index++;
3678 }
3679
3680 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3681 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3682
f604c2a2
L		 3683 /* Don't fill the second and third slots in PLT entry for
3684 static executables nor without PLT0. */
765e526c 3685 if (plt == htab->elf.splt && htab->plt.has_plt0)
aec6b87e
L		 3686 {
3687 bfd_put_32 (output_bfd,
3688 plt_index * sizeof (Elf32_External_Rel),
3689 plt->contents + h->plt.offset
765e526c 3690 + htab->lazy_plt->plt_reloc_offset);
f604c2a2
L		 3691 bfd_put_32 (output_bfd,
3692 - (h->plt.offset
765e526c 3693 + htab->lazy_plt->plt_plt_offset + 4),
f604c2a2 3694 (plt->contents + h->plt.offset
765e526c 3695 + htab->lazy_plt->plt_plt_offset));
aec6b87e 3696 }
e1f98742 3697 }
dd7e64d4
L		 3698 }
3699 else if (eh->plt_got.offset != (bfd_vma) -1)
3700 {
3701 bfd_vma got_offset, plt_offset;
3702 asection *plt, *got, *gotplt;
3703 const bfd_byte *got_plt_entry;
3704
dd7e64d4
L		 3705 /* Set the entry in the GOT procedure linkage table. */
3706 plt = htab->plt_got;
3707 got = htab->elf.sgot;
3708 gotplt = htab->elf.sgotplt;
3709 got_offset = h->got.offset;
3710
3711 if (got_offset == (bfd_vma) -1
3712 || plt == NULL
3713 || got == NULL
3714 || gotplt == NULL)
3715 abort ();
3716
3717 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 3718 if (! bfd_link_pic (info))
252b5132 3719 {
765e526c 3720 got_plt_entry = htab->non_lazy_plt->plt_entry;
dd7e64d4 3721 got_offset += got->output_section->vma + got->output_offset;
252b5132 3722 }
dd7e64d4
L		 3723 else
3724 {
765e526c 3725 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
dd7e64d4
L		 3726 got_offset += (got->output_section->vma
3727 + got->output_offset
3728 - gotplt->output_section->vma
3729 - gotplt->output_offset);
3730 }
3731
3732 plt_offset = eh->plt_got.offset;
3733 memcpy (plt->contents + plt_offset, got_plt_entry,
765e526c 3734 htab->non_lazy_plt->plt_entry_size);
dd7e64d4 3735 bfd_put_32 (output_bfd, got_offset,
f604c2a2 3736 (plt->contents + plt_offset
765e526c 3737 + htab->non_lazy_plt->plt_got_offset));
dd7e64d4
L		 3738 }
3739
aec6b87e
L		 3740 if (!local_undefweak
3741 && !h->def_regular
dd7e64d4
L		 3742 && (h->plt.offset != (bfd_vma) -1
3743 || eh->plt_got.offset != (bfd_vma) -1))
3744 {
3745 /* Mark the symbol as undefined, rather than as defined in
3746 the .plt section. Leave the value if there were any
3747 relocations where pointer equality matters (this is a clue
3748 for the dynamic linker, to make function pointer
3749 comparisons work between an application and shared
3750 library), otherwise set it to zero. If a function is only
3751 called from a binary, there is no need to slow down
3752 shared libraries because of that. */
3753 sym->st_shndx = SHN_UNDEF;
3754 if (!h->pointer_equality_needed)
3755 sym->st_value = 0;
252b5132
RH		 3756 }
3757
4ec09950
L		 3758 _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym);
3759
aec6b87e
L		 3760 /* Don't generate dynamic GOT relocation against undefined weak
3761 symbol in executable. */
13ae64f3 3762 if (h->got.offset != (bfd_vma) -1
0afcef53
L		 3763 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3764 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
aec6b87e 3765 && !local_undefweak)
252b5132 3766 {
947216bf 3767 Elf_Internal_Rela rel;
233cc9c1 3768 asection *relgot = htab->elf.srelgot;
252b5132
RH		 3769
3770 /* This symbol has an entry in the global offset table. Set it
3771 up. */
3772
6de2ae4a 3773 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 3774 abort ();
252b5132 3775
6de2ae4a
L		 3776 rel.r_offset = (htab->elf.sgot->output_section->vma
3777 + htab->elf.sgot->output_offset
dc810e39 3778 + (h->got.offset & ~(bfd_vma) 1));
252b5132 3779
dd5724d5
AM		 3780 /* If this is a static link, or it is a -Bsymbolic link and the
3781 symbol is defined locally or was forced to be local because
3782 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 3783 The entry in the global offset table will already have been
3784 initialized in the relocate_section function. */
710ab287 3785 if (h->def_regular
0018b0a3
L		 3786 && h->type == STT_GNU_IFUNC)
3787 {
233cc9c1
L		 3788 if (h->plt.offset == (bfd_vma) -1)
3789 {
3790 /* STT_GNU_IFUNC is referenced without PLT. */
3791 if (htab->elf.splt == NULL)
3792 {
3793 /* use .rel[a].iplt section to store .got relocations
3794 in static executable. */
3795 relgot = htab->elf.irelplt;
3796 }
6999821f 3797 if (SYMBOL_REFERENCES_LOCAL_P (info, h))
233cc9c1 3798 {
871b3ab2 3799 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 3800 h->root.root.string,
3801 h->root.u.def.section->owner);
3802
233cc9c1
L		 3803 bfd_put_32 (output_bfd,
3804 (h->root.u.def.value
3805 + h->root.u.def.section->output_section->vma
3806 + h->root.u.def.section->output_offset),
3807 htab->elf.sgot->contents + h->got.offset);
3808 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3809 }
3810 else
3811 goto do_glob_dat;
3812 }
3813 else if (bfd_link_pic (info))
710ab287
L		 3814 {
3815 /* Generate R_386_GLOB_DAT. */
3816 goto do_glob_dat;
3817 }
3818 else
3819 {
cd2b2c10 3820 asection *plt;
ee2fdd6f 3821 bfd_vma plt_offset;
cd2b2c10 3822
710ab287
L		 3823 if (!h->pointer_equality_needed)
3824 abort ();
3825
3826 /* For non-shared object, we can't use .got.plt, which
3827 contains the real function addres if we need pointer
3828 equality. We load the GOT entry with the PLT entry. */
ee2fdd6f
L		 3829 if (htab->plt_second != NULL)
3830 {
3831 plt = htab->plt_second;
3832 plt_offset = eh->plt_second.offset;
3833 }
3834 else
3835 {
3836 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3837 plt_offset = h->plt.offset;
3838 }
710ab287
L		 3839 bfd_put_32 (output_bfd,
3840 (plt->output_section->vma
ee2fdd6f 3841 + plt->output_offset + plt_offset),
6de2ae4a 3842 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 3843 return TRUE;
3844 }
0018b0a3 3845 }
0e1862bb 3846 else if (bfd_link_pic (info)
6999821f 3847 && SYMBOL_REFERENCES_LOCAL_P (info, h))
dd5724d5 3848 {
6725bdbf 3849 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 3850 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3851 }
252b5132
RH		 3852 else
3853 {
dd5724d5 3854 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 3855do_glob_dat:
6725bdbf 3856 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 3857 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 3858 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3859 }
3860
233cc9c1 3861 elf_append_rel (output_bfd, relgot, &rel);
252b5132
RH		 3862 }
3863
f5385ebf 3864 if (h->needs_copy)
252b5132 3865 {
947216bf 3866 Elf_Internal_Rela rel;
5474d94f 3867 asection *s;
252b5132
RH		 3868
3869 /* This symbol needs a copy reloc. Set it up. */
ff38b4cc 3870 VERIFY_COPY_RELOC (h, htab)
252b5132
RH		 3871
3872 rel.r_offset = (h->root.u.def.value
3873 + h->root.u.def.section->output_section->vma
3874 + h->root.u.def.section->output_offset);
3875 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
afbf7e8e 3876 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 3877 s = htab->elf.sreldynrelro;
3878 else
3879 s = htab->elf.srelbss;
3880 elf_append_rel (output_bfd, s, &rel);
252b5132
RH		 3881 }
3882
b34976b6 3883 return TRUE;
252b5132
RH		 3884}
3885
c25bc9fc
L		 3886/* Finish up local dynamic symbol handling. We set the contents of
3887 various dynamic sections here. */
3888
3889static bfd_boolean
3890elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
3891{
3892 struct elf_link_hash_entry *h
3893 = (struct elf_link_hash_entry *) *slot;
3894 struct bfd_link_info *info
23209a78 3895 = (struct bfd_link_info *) inf;
c25bc9fc
L		 3896
3897 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
3898 h, NULL);
3899}
3900
aec6b87e
L		 3901/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
3902 here since undefined weak symbol may not be dynamic and may not be
3903 called for elf_i386_finish_dynamic_symbol. */
3904
3905static bfd_boolean
3906elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
3907 void *inf)
3908{
3909 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
3910 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3911
3912 if (h->root.type != bfd_link_hash_undefweak
3913 || h->dynindx != -1)
3914 return TRUE;
3915
3916 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5f0f0847 3917 info, h, NULL);
aec6b87e
L		 3918}
3919
38701953
AM		 3920/* Used to decide how to sort relocs in an optimal manner for the
3921 dynamic linker, before writing them out. */
3922
3923static enum elf_reloc_type_class
cae1fbbb 3924elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 3925 const asection *rel_sec ATTRIBUTE_UNUSED,
3926 const Elf_Internal_Rela *rela)
38701953 3927{
cae1fbbb
L		 3928 bfd *abfd = info->output_bfd;
3929 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3930 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 3931
d9e3b590
L		 3932 if (htab->dynsym != NULL
3933 && htab->dynsym->contents != NULL)
3934 {
3935 /* Check relocation against STT_GNU_IFUNC symbol if there are
07d6d2b8 3936 dynamic symbols. */
d9e3b590 3937 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
c428ce9d
L		 3938 if (r_symndx != STN_UNDEF)
3939 {
3940 Elf_Internal_Sym sym;
3941 if (!bed->s->swap_symbol_in (abfd,
3942 (htab->dynsym->contents
3943 + r_symndx * sizeof (Elf32_External_Sym)),
3944 0, &sym))
3945 abort ();
d9e3b590 3946
c428ce9d
L		 3947 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3948 return reloc_class_ifunc;
3949 }
d9e3b590 3950 }
cae1fbbb 3951
55fd94b0 3952 switch (ELF32_R_TYPE (rela->r_info))
38701953 3953 {
c428ce9d
L		 3954 case R_386_IRELATIVE:
3955 return reloc_class_ifunc;
38701953
AM		 3956 case R_386_RELATIVE:
3957 return reloc_class_relative;
3958 case R_386_JUMP_SLOT:
3959 return reloc_class_plt;
3960 case R_386_COPY:
3961 return reloc_class_copy;
3962 default:
3963 return reloc_class_normal;
3964 }
3965}
3966
252b5132
RH		 3967/* Finish up the dynamic sections. */
3968
b34976b6 3969static bfd_boolean
55fd94b0
AM		 3970elf_i386_finish_dynamic_sections (bfd *output_bfd,
3971 struct bfd_link_info *info)
252b5132 3972{
0afcef53 3973 struct elf_x86_link_hash_table *htab;
252b5132 3974
9577f60b 3975 htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
4dfe6ac6
NC		 3976 if (htab == NULL)
3977 return FALSE;
3978
9577f60b
L		 3979 if (!htab->elf.dynamic_sections_created)
3980 return TRUE;
252b5132 3981
9577f60b 3982 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 3983 {
9577f60b
L		 3984 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3985 really seem like the right value. */
3986 elf_section_data (htab->elf.splt->output_section)
3987 ->this_hdr.sh_entsize = 4;
252b5132 3988
9577f60b 3989 if (htab->plt.has_plt0)
252b5132 3990 {
9577f60b
L		 3991 /* Fill in the special first entry in the procedure linkage
3992 table. */
9577f60b
L		 3993 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
3994 htab->lazy_plt->plt0_entry_size);
3995 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
851b6fa1 3996 htab->plt0_pad_byte,
9577f60b
L		 3997 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
3998 if (!bfd_link_pic (info))
252b5132 3999 {
9577f60b
L		 4000 bfd_put_32 (output_bfd,
4001 (htab->elf.sgotplt->output_section->vma
4002 + htab->elf.sgotplt->output_offset
4003 + 4),
4004 htab->elf.splt->contents
4005 + htab->lazy_plt->plt0_got1_offset);
4006 bfd_put_32 (output_bfd,
4007 (htab->elf.sgotplt->output_section->vma
4008 + htab->elf.sgotplt->output_offset
4009 + 8),
4010 htab->elf.splt->contents
4011 + htab->lazy_plt->plt0_got2_offset);
1f78f649 4012
851b6fa1 4013 if (htab->target_os == is_vxworks)
eac338cf 4014 {
9577f60b
L		 4015 Elf_Internal_Rela rel;
4016 int num_plts = (htab->elf.splt->size
4017 / htab->plt.plt_entry_size) - 1;
4018 unsigned char *p;
4019 asection *srelplt2 = htab->srelplt2;
4020
4021 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4022 + 4. On IA32 we use REL relocations so the
4023 addend goes in the PLT directly. */
4024 rel.r_offset = (htab->elf.splt->output_section->vma
4025 + htab->elf.splt->output_offset
4026 + htab->lazy_plt->plt0_got1_offset);
4027 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4028 R_386_32);
4029 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4030 srelplt2->contents);
4031 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4032 + 8. */
4033 rel.r_offset = (htab->elf.splt->output_section->vma
4034 + htab->elf.splt->output_offset
4035 + htab->lazy_plt->plt0_got2_offset);
4036 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4037 R_386_32);
4038 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4039 srelplt2->contents +
4040 sizeof (Elf32_External_Rel));
4041 /* Correct the .rel.plt.unloaded relocations. */
4042 p = srelplt2->contents;
4043 if (bfd_link_pic (info))
4044 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4045 else
4046 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
eac338cf 4047
9577f60b 4048 for (; num_plts; num_plts--)
1f78f649 4049 {
9577f60b 4050 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
f604c2a2 4051 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
1f78f649 4052 R_386_32);
9577f60b
L		 4053 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4054 p += sizeof (Elf32_External_Rel);
f604c2a2 4055
9577f60b
L		 4056 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4057 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4058 R_386_32);
4059 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4060 p += sizeof (Elf32_External_Rel);
1f78f649 4061 }
eac338cf
PB		 4062 }
4063 }
252b5132 4064 }
fff53dae
L		 4065 }
4066
aec6b87e
L		 4067 /* Fill PLT entries for undefined weak symbols in PIE. */
4068 if (bfd_link_pie (info))
4069 bfd_hash_traverse (&info->hash->table,
4070 elf_i386_pie_finish_undefweak_symbol,
4071 info);
4072
b34976b6 4073 return TRUE;
252b5132
RH		 4074}
4075
233cc9c1
L		 4076/* Fill PLT/GOT entries and allocate dynamic relocations for local
4077 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4078 It has to be done before elf_link_sort_relocs is called so that
4079 dynamic relocations are properly sorted. */
4080
4081static bfd_boolean
4082elf_i386_output_arch_local_syms
4083 (bfd *output_bfd ATTRIBUTE_UNUSED,
4084 struct bfd_link_info *info,
4085 void *flaginfo ATTRIBUTE_UNUSED,
4086 int (*func) (void *, const char *,
4087 Elf_Internal_Sym *,
4088 asection *,
4089 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4090{
0afcef53
L		 4091 struct elf_x86_link_hash_table *htab
4092 = elf_x86_hash_table (info, I386_ELF_DATA);
233cc9c1
L		 4093 if (htab == NULL)
4094 return FALSE;
4095
4096 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4097 htab_traverse (htab->loc_hash_table,
4098 elf_i386_finish_local_dynamic_symbol,
4099 info);
4100
4101 return TRUE;
4102}
4103
f604c2a2 4104/* Forward declaration. */
765e526c 4105static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
f604c2a2
L		 4106
4107/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4108 dynamic relocations. */
4109
4110static long
4111elf_i386_get_synthetic_symtab (bfd *abfd,
4112 long symcount ATTRIBUTE_UNUSED,
4113 asymbol **syms ATTRIBUTE_UNUSED,
4114 long dynsymcount,
4115 asymbol **dynsyms,
4116 asymbol **ret)
4117{
f493882d 4118 long count, i, n;
f604c2a2 4119 int j;
f604c2a2 4120 bfd_byte *plt_contents;
f493882d 4121 long relsize;
765e526c
L		 4122 const struct elf_x86_lazy_plt_layout *lazy_plt;
4123 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4124 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4125 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
f604c2a2
L		 4126 asection *plt;
4127 bfd_vma got_addr;
f493882d
L		 4128 enum elf_x86_plt_type plt_type;
4129 struct elf_x86_plt plts[] =
3972882e 4130 {
f493882d
L		 4131 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4132 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4133 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4134 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
f604c2a2 4135 };
144bed8d 4136
f604c2a2 4137 *ret = NULL;
144bed8d 4138
f604c2a2
L		 4139 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4140 return 0;
3972882e 4141
f604c2a2
L		 4142 if (dynsymcount <= 0)
4143 return 0;
cca5b8b6 4144
f604c2a2
L		 4145 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4146 if (relsize <= 0)
4147 return -1;
cca5b8b6 4148
f604c2a2
L		 4149 non_lazy_plt = NULL;
4150 /* Silence GCC 6. */
4151 lazy_plt = NULL;
ee2fdd6f
L		 4152 non_lazy_ibt_plt = NULL;
4153 lazy_ibt_plt = NULL;
851b6fa1 4154 switch (get_elf_x86_backend_data (abfd)->target_os)
144bed8d 4155 {
f604c2a2 4156 case is_normal:
3b4c3844 4157 case is_solaris:
f604c2a2 4158 non_lazy_plt = &elf_i386_non_lazy_plt;
ee2fdd6f
L		 4159 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4160 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 4161 /* Fall through */
4162 case is_vxworks:
4163 lazy_plt = &elf_i386_lazy_plt;
4164 break;
4165 case is_nacl:
4166 lazy_plt = &elf_i386_nacl_plt;
4167 break;
4168 }
4169
4170 got_addr = 0;
3972882e 4171
f604c2a2
L		 4172 count = 0;
4173 for (j = 0; plts[j].name != NULL; j++)
4174 {
4175 plt = bfd_get_section_by_name (abfd, plts[j].name);
90efb642 4176 if (plt == NULL || plt->size == 0)
6f25f223 4177 continue;
533d0af0 4178
f604c2a2
L		 4179 /* Get the PLT section contents. */
4180 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4181 if (plt_contents == NULL)
4182 break;
4183 if (!bfd_get_section_contents (abfd, (asection *) plt,
4184 plt_contents, 0, plt->size))
4185 {
4186 free (plt_contents);
4187 break;
4188 }
4189
4190 /* Check what kind of PLT it is. */
4191 plt_type = plt_unknown;
90efb642
L		 4192 if (plts[j].type == plt_unknown
4193 && (plt->size >= (lazy_plt->plt0_entry_size
4194 + lazy_plt->plt_entry_size)))
f604c2a2
L		 4195 {
4196 /* Match lazy PLT first. */
4197 if (memcmp (plt_contents, lazy_plt->plt0_entry,
4198 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4199 {
4200 /* The fist entry in the lazy IBT PLT is the same as the
4201 normal lazy PLT. */
4202 if (lazy_ibt_plt != NULL
90efb642 4203 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4204 lazy_ibt_plt->plt_entry,
4205 lazy_ibt_plt->plt_got_offset) == 0))
4206 plt_type = plt_lazy | plt_second;
4207 else
4208 plt_type = plt_lazy;
4209 }
f604c2a2
L		 4210 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4211 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4212 {
4213 /* The fist entry in the PIC lazy IBT PLT is the same as
4214 the normal PIC lazy PLT. */
4215 if (lazy_ibt_plt != NULL
90efb642 4216 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4217 lazy_ibt_plt->pic_plt_entry,
4218 lazy_ibt_plt->plt_got_offset) == 0))
4219 plt_type = plt_lazy | plt_pic | plt_second;
4220 else
4221 plt_type = plt_lazy | plt_pic;
4222 }
f604c2a2
L		 4223 }
4224
4225 if (non_lazy_plt != NULL
90efb642
L		 4226 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4227 && plt->size >= non_lazy_plt->plt_entry_size)
f604c2a2
L		 4228 {
4229 /* Match non-lazy PLT. */
4230 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4231 non_lazy_plt->plt_got_offset) == 0)
4232 plt_type = plt_non_lazy;
4233 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4234 non_lazy_plt->plt_got_offset) == 0)
4235 plt_type = plt_pic;
4236 }
4237
ee2fdd6f 4238 if ((non_lazy_ibt_plt != NULL)
90efb642
L		 4239 && (plt_type == plt_unknown || plt_type == plt_second)
4240 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
ee2fdd6f
L		 4241 {
4242 if (memcmp (plt_contents,
4243 non_lazy_ibt_plt->plt_entry,
4244 non_lazy_ibt_plt->plt_got_offset) == 0)
4245 {
4246 /* Match IBT PLT. */
4247 plt_type = plt_second;
4248 non_lazy_plt = non_lazy_ibt_plt;
4249 }
4250 else if (memcmp (plt_contents,
4251 non_lazy_ibt_plt->pic_plt_entry,
4252 non_lazy_ibt_plt->plt_got_offset) == 0)
4253 {
4254 /* Match PIC IBT PLT. */
4255 plt_type = plt_second | plt_pic;
4256 non_lazy_plt = non_lazy_ibt_plt;
4257 }
4258 }
4259
f604c2a2 4260 if (plt_type == plt_unknown)
37c0b6ee
L		 4261 {
4262 free (plt_contents);
4263 continue;
4264 }
3972882e 4265
f604c2a2
L		 4266 plts[j].sec = plt;
4267 plts[j].type = plt_type;
ec1f73bb 4268
f604c2a2
L		 4269 if ((plt_type & plt_lazy))
4270 {
4271 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4272 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4273 /* Skip PLT0 in lazy PLT. */
4274 i = 1;
4275 }
4276 else
4277 {
4278 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4279 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4280 i = 0;
4281 }
fca6ae69 4282
ee2fdd6f
L		 4283 /* Skip lazy PLT when the second PLT is used. */
4284 if ((plt_type & (plt_lazy | plt_second))
4285 == (plt_lazy | plt_second))
4286 plts[j].count = 0;
4287 else
4288 {
4289 n = plt->size / plts[j].plt_entry_size;
4290 plts[j].count = n;
4291 count += n - i;
4292 }
f604c2a2
L		 4293
4294 plts[j].contents = plt_contents;
4295
4296 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4297 if ((plt_type & plt_pic))
4298 got_addr = (bfd_vma) -1;
144bed8d
L		 4299 }
4300
f493882d
L		 4301 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4302 got_addr, plts, dynsyms,
4303 ret);
4c45e5c9
JJ		 4304}
4305
f604c2a2
L		 4306/* Set up i386 GNU properties. Return the first relocatable ELF input
4307 with GNU properties if found. Otherwise, return NULL. */
4308
4309static bfd *
4310elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4311{
1de031c8 4312 struct elf_x86_init_table init_table;
f604c2a2 4313
851b6fa1 4314 switch (get_elf_x86_backend_data (info->output_bfd)->target_os)
f604c2a2
L		 4315 {
4316 case is_normal:
3b4c3844 4317 case is_solaris:
851b6fa1 4318 init_table.plt0_pad_byte = 0x0;
1de031c8
L		 4319 init_table.lazy_plt = &elf_i386_lazy_plt;
4320 init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4321 init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4322 init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 4323 break;
4324 case is_vxworks:
851b6fa1 4325 init_table.plt0_pad_byte = 0x90;
1de031c8
L		 4326 init_table.lazy_plt = &elf_i386_lazy_plt;
4327 init_table.non_lazy_plt = NULL;
4328 init_table.lazy_ibt_plt = NULL;
4329 init_table.non_lazy_ibt_plt = NULL;
f604c2a2
L		 4330 break;
4331 case is_nacl:
851b6fa1 4332 init_table.plt0_pad_byte = 0x90;
1de031c8
L		 4333 init_table.lazy_plt = &elf_i386_nacl_plt;
4334 init_table.non_lazy_plt = NULL;
4335 init_table.lazy_ibt_plt = NULL;
4336 init_table.non_lazy_ibt_plt = NULL;
f604c2a2
L		 4337 break;
4338 }
4339
1de031c8
L		 4340 init_table.r_info = elf32_r_info;
4341 init_table.r_sym = elf32_r_sym;
7a382c1c 4342
1de031c8 4343 return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
f604c2a2
L		 4344}
4345
6d00b590 4346#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 4347#define TARGET_LITTLE_NAME "elf32-i386"
4348#define ELF_ARCH bfd_arch_i386
ae95ffa6 4349#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 4350#define ELF_MACHINE_CODE EM_386
4351#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 4352
4353#define elf_backend_can_gc_sections 1
51b64d56 4354#define elf_backend_can_refcount 1
252b5132
RH		 4355#define elf_backend_want_got_plt 1
4356#define elf_backend_plt_readonly 1
4357#define elf_backend_want_plt_sym 0
4358#define elf_backend_got_header_size 12
e41b3a13 4359#define elf_backend_plt_alignment 4
64f52338 4360#define elf_backend_dtrel_excludes_plt 1
f7483970 4361#define elf_backend_extern_protected_data 1
bedfd056 4362#define elf_backend_caches_rawsize 1
5474d94f 4363#define elf_backend_want_dynrelro 1
252b5132 4364
8c29f035
AM		 4365/* Support RELA for objdump of prelink objects. */
4366#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 4367#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4368
dd5724d5 4369#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
dd5724d5 4370#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 4371#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 4372#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5 4373
13285a1b 4374#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 4375#define elf_backend_check_relocs elf_i386_check_relocs
f604c2a2 4376#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
0ac8d2ca 4377#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 4378#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4379#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
233cc9c1 4380#define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
c5fccbec
DJ		 4381#define elf_backend_grok_prstatus elf_i386_grok_prstatus
4382#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 4383#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca 4384#define elf_backend_relocate_section elf_i386_relocate_section
f604c2a2 4385#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
9f857535 4386#define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
dd5724d5 4387
a2f63b2e
MR		 4388#define elf_backend_linux_prpsinfo32_ugid16 TRUE
4389
8f56f7a2
L		 4390#define elf32_bed elf32_i386_bed
4391
252b5132 4392#include "elf32-target.h"
2bc3c89a
AM		 4393
4394/* FreeBSD support. */
4395
4396#undef TARGET_LITTLE_SYM
6d00b590 4397#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 4398#undef TARGET_LITTLE_NAME
4399#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 4400#undef ELF_OSABI
4401#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 4402
4403/* The kernel recognizes executables as valid only if they carry a
4404 "FreeBSD" label in the ELF header. So we put this label on all
4405 executables and (for simplicity) also all other object files. */
4406
2bc3c89a 4407static void
d8045f23 4408elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 4409{
78245035 4410 _bfd_elf_post_process_headers (abfd, info);
2bc3c89a 4411
2bc3c89a 4412#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 4413 {
4414 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4415 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4416 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4417 }
caf47ea6 4418#endif
2bc3c89a
AM		 4419}
4420
4421#undef elf_backend_post_process_headers
d8045f23 4422#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC		 4423#undef elf32_bed
4424#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 4425
d8045f23
NC		 4426#undef elf_backend_add_symbol_hook
4427
2bc3c89a 4428#include "elf32-target.h"
eac338cf 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
914082d1
L		 4445#undef elf_backend_post_process_headers
4446
a6cc6b3b
RO		 4447/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4448 objects won't be recognized. */
4449#undef ELF_OSABI
4450
4451#undef elf32_bed
4452#define elf32_bed elf32_i386_sol2_bed
4453
7dc98aea
RO		 4454/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4455 boundary. */
84865015 4456#undef elf_backend_static_tls_alignment
7dc98aea
RO		 4457#define elf_backend_static_tls_alignment 8
4458
a6cc6b3b
RO		 4459/* The Solaris 2 ABI requires a plt symbol on all platforms.
4460
4461 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4462 File, p.63. */
84865015 4463#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 4464#define elf_backend_want_plt_sym 1
4465
84865015
NC		 4466#undef elf_backend_strtab_flags
4467#define elf_backend_strtab_flags SHF_STRINGS
4468
5522f910 4469/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
07d6d2b8 4470 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5522f910
NC		 4471 FALSE otherwise. ISECTION is the best guess matching section from the
4472 input bfd IBFD, but it might be NULL. */
4473
84865015 4474static bfd_boolean
5522f910
NC		 4475elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4476 bfd *obfd ATTRIBUTE_UNUSED,
4477 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4478 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 4479{
4480 /* PR 19938: FIXME: Need to add code for setting the sh_info
5522f910
NC		 4481 and sh_link fields of Solaris specific section types. */
4482 return FALSE;
84865015 4483
5522f910 4484 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
84865015
NC		 4485 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4486
4487http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4488
4489 The following values should be set:
07d6d2b8
AM		 4490
4491Type Link Info
84865015
NC		 4492-----------------------------------------------------------------------------
4493SHT_SUNW_ancillary The section header index of 0
07d6d2b8
AM		 4494 [0x6fffffee] the associated string table.
4495
84865015 4496SHT_SUNW_capinfo The section header index of For a dynamic object, the
07d6d2b8
AM		 4497 [0x6ffffff0] the associated symbol table. section header index of
4498 the associated
84865015
NC		 4499 SHT_SUNW_capchain table,
4500 otherwise 0.
4501
4502SHT_SUNW_symsort The section header index of 0
07d6d2b8 4503 [0x6ffffff1] the associated symbol table.
84865015
NC		 4504
4505SHT_SUNW_tlssort The section header index of 0
07d6d2b8
AM		 4506 [0x6ffffff2] the associated symbol table.
4507
4508SHT_SUNW_LDYNSYM The section header index of One greater than the
4509 [0x6ffffff3] the associated string table. symbol table index of the
4510 This index is the same string last local symbol,
84865015 4511 table used by the SHT_DYNSYM STB_LOCAL. Since
07d6d2b8
AM		 4512 section. SHT_SUNW_LDYNSYM only
4513 contains local symbols,
84865015
NC		 4514 sh_info is equivalent to
4515 the number of symbols in
4516 the table.
4517
07d6d2b8
AM		 4518SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4519 [0x6ffffff5] the section header index of to named strings, the
4520 the associated section header index of
4521 SHT_SUNW_capinfo table, the associated string
4522 otherwise 0. table, otherwise 0.
84865015 4523
07d6d2b8
AM		 4524SHT_SUNW_move The section header index of 0
4525 [0x6ffffffa] the associated symbol table.
4526
4527SHT_SUNW_COMDAT 0 0
84865015
NC		 4528 [0x6ffffffb]
4529
4530SHT_SUNW_syminfo The section header index of The section header index
07d6d2b8
AM		 4531 [0x6ffffffc] the associated symbol table. of the associated
4532 .dynamic section.
84865015 4533
07d6d2b8
AM		 4534SHT_SUNW_verdef The section header index of The number of version
4535 [0x6ffffffd] the associated string table. definitions within the
4536 section.
84865015
NC		 4537
4538SHT_SUNW_verneed The section header index of The number of version
07d6d2b8
AM		 4539 [0x6ffffffe] the associated string table. dependencies within the
4540 section.
84865015 4541
07d6d2b8
AM		 4542SHT_SUNW_versym The section header index of 0
4543 [0x6fffffff] the associated symbol table. */
84865015
NC		 4544}
4545
5522f910
NC		 4546#undef elf_backend_copy_special_section_fields
4547#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
84865015 4548
a6cc6b3b
RO		 4549#include "elf32-target.h"
4550
bf64a951
L		 4551/* Intel MCU support. */
4552
4553static bfd_boolean
4554elf32_iamcu_elf_object_p (bfd *abfd)
4555{
4556 /* Set the right machine number for an IAMCU elf32 file. */
4557 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4558 return TRUE;
4559}
4560
4561#undef TARGET_LITTLE_SYM
4562#define TARGET_LITTLE_SYM iamcu_elf32_vec
4563#undef TARGET_LITTLE_NAME
4564#define TARGET_LITTLE_NAME "elf32-iamcu"
84865015 4565#undef ELF_ARCH
bf64a951
L		 4566#define ELF_ARCH bfd_arch_iamcu
4567
4568#undef ELF_MACHINE_CODE
4569#define ELF_MACHINE_CODE EM_IAMCU
4570
3b4c3844
L		 4571#undef elf_backend_arch_data
4572#define elf_backend_arch_data &elf_i386_arch_bed
4573
bf64a951
L		 4574#undef ELF_OSABI
4575
4576#undef elf32_bed
4577#define elf32_bed elf32_iamcu_bed
4578
4579#undef elf_backend_object_p
4580#define elf_backend_object_p elf32_iamcu_elf_object_p
4581
4582#undef elf_backend_static_tls_alignment
4583
4584#undef elf_backend_want_plt_sym
07d6d2b8 4585#define elf_backend_want_plt_sym 0
bf64a951 4586
84865015 4587#undef elf_backend_strtab_flags
5522f910 4588#undef elf_backend_copy_special_section_fields
84865015 4589
bf64a951
L		 4590#include "elf32-target.h"
4591
4592/* Restore defaults. */
4593#undef ELF_ARCH
4594#define ELF_ARCH bfd_arch_i386
4595#undef ELF_MACHINE_CODE
4596#define ELF_MACHINE_CODE EM_386
4597
a27e4371
RM		 4598/* Native Client support. */
4599
4600#undef TARGET_LITTLE_SYM
6d00b590 4601#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 4602#undef TARGET_LITTLE_NAME
4603#define TARGET_LITTLE_NAME "elf32-i386-nacl"
4604#undef elf32_bed
4605#define elf32_bed elf32_i386_nacl_bed
4606
4607#undef ELF_MAXPAGESIZE
4608#define ELF_MAXPAGESIZE 0x10000
4609
4610/* Restore defaults. */
4611#undef ELF_OSABI
4612#undef elf_backend_want_plt_sym
4613#define elf_backend_want_plt_sym 0
4614#undef elf_backend_post_process_headers
a27e4371
RM		 4615#undef elf_backend_static_tls_alignment
4616
4617/* NaCl uses substantially different PLT entries for the same effects. */
4618
4619#undef elf_backend_plt_alignment
4620#define elf_backend_plt_alignment 5
4621#define NACL_PLT_ENTRY_SIZE 64
4622#define NACLMASK 0xe0 /* 32-byte alignment mask. */
4623
4624static const bfd_byte elf_i386_nacl_plt0_entry[] =
4625 {
4626 0xff, 0x35, /* pushl contents of address */
07d6d2b8
AM		 4627 0, 0, 0, 0, /* replaced with address of .got + 4. */
4628 0x8b, 0x0d, /* movl contents of address, %ecx */
4629 0, 0, 0, 0, /* replaced with address of .got + 8. */
a27e4371
RM		 4630 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4631 0xff, 0xe1 /* jmp *%ecx */
4632 };
4633
4634static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
4635 {
4636 0x8b, 0x0d, /* movl contents of address, %ecx */
4637 0, 0, 0, 0, /* replaced with GOT slot address. */
4638 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4639 0xff, 0xe1, /* jmp *%ecx */
4640
07d6d2b8 4641 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4642 0x90,
4643 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4644 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4645
4646 /* Lazy GOT entries point here (32-byte aligned). */
4647 0x68, /* pushl immediate */
4648 0, 0, 0, 0, /* replaced with reloc offset. */
4649 0xe9, /* jmp relative */
07d6d2b8 4650 0, 0, 0, 0, /* replaced with offset to .plt. */
a27e4371 4651
07d6d2b8 4652 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4653 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4654 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4655 0x90, 0x90
4656 };
4657
4658static const bfd_byte
4659elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
4660 {
4661 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
4662 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
4663 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
4664 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 4665
4666 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
4667 so pad to that size with nop instructions. */
4668 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 4669 };
4670
4671static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
4672 {
07d6d2b8
AM		 4673 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
4674 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
4675 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
4676 0xff, 0xe1, /* jmp *%ecx */
a27e4371 4677
07d6d2b8 4678 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4679 0x90,
4680 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4681 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4682
4683 /* Lazy GOT entries point here (32-byte aligned). */
07d6d2b8
AM		 4684 0x68, /* pushl immediate */
4685 0, 0, 0, 0, /* replaced with offset into relocation table. */
4686 0xe9, /* jmp relative */
4687 0, 0, 0, 0, /* replaced with offset to start of .plt. */
a27e4371 4688
07d6d2b8 4689 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4690 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4691 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4692 0x90, 0x90
4693 };
4694
4695static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
4696 {
07d6d2b8
AM		 4697#if (PLT_CIE_LENGTH != 20 \
4698 || PLT_FDE_LENGTH != 36 \
4699 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
a27e4371 4700 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
851b6fa1 4701# error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
a27e4371
RM		 4702#endif
4703 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
07d6d2b8
AM		 4704 0, 0, 0, 0, /* CIE ID */
4705 1, /* CIE version */
4706 'z', 'R', 0, /* Augmentation string */
4707 1, /* Code alignment factor */
4708 0x7c, /* Data alignment factor: -4 */
4709 8, /* Return address column */
a27e4371
RM		 4710 1, /* Augmentation size */
4711 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
4712 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
4713 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
4714 DW_CFA_nop, DW_CFA_nop,
4715
07d6d2b8 4716 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
a27e4371 4717 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
07d6d2b8
AM		 4718 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
4719 0, 0, 0, 0, /* .plt size goes here */
4720 0, /* Augmentation size */
4721 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
4722 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
4723 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
4724 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
4725 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
4726 13, /* Block length */
4727 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
4728 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
a27e4371
RM		 4729 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
4730 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
4731 DW_CFA_nop, DW_CFA_nop
4732 };
4733
765e526c 4734static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
a27e4371
RM		 4735 {
4736 elf_i386_nacl_plt0_entry, /* plt0_entry */
4737 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
a27e4371
RM		 4738 elf_i386_nacl_plt_entry, /* plt_entry */
4739 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
92e68c1d
L		 4740 NULL, /* plt_tlsdesc_entry */
4741 0, /* plt_tlsdesc_entry_size*/
4742 0, /* plt_tlsdesc_got1_offset */
4743 0, /* plt_tlsdesc_got2_offset */
4744 0, /* plt_tlsdesc_got1_insn_end */
4745 0, /* plt_tlsdesc_got2_insn_end */
765e526c
L		 4746 2, /* plt0_got1_offset */
4747 8, /* plt0_got2_offset */
4748 0, /* plt0_got2_insn_end */
a27e4371
RM		 4749 2, /* plt_got_offset */
4750 33, /* plt_reloc_offset */
4751 38, /* plt_plt_offset */
765e526c
L		 4752 0, /* plt_got_insn_size */
4753 0, /* plt_plt_insn_end */
a27e4371
RM		 4754 32, /* plt_lazy_offset */
4755 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
4756 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
4757 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
f604c2a2 4758 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
a27e4371
RM		 4759 };
4760
851b6fa1 4761static const struct elf_x86_backend_data elf_i386_nacl_arch_bed =
a27e4371 4762 {
07d6d2b8 4763 is_nacl /* os */
a27e4371
RM		 4764 };
4765
64b384e1
RM		 4766static bfd_boolean
4767elf32_i386_nacl_elf_object_p (bfd *abfd)
4768{
4769 /* Set the right machine number for a NaCl i386 ELF32 file. */
4770 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
4771 return TRUE;
4772}
4773
a27e4371
RM		 4774#undef elf_backend_arch_data
4775#define elf_backend_arch_data &elf_i386_nacl_arch_bed
4776
64b384e1
RM		 4777#undef elf_backend_object_p
4778#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 4779#undef elf_backend_modify_segment_map
4780#define elf_backend_modify_segment_map nacl_modify_segment_map
4781#undef elf_backend_modify_program_headers
4782#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 4783#undef elf_backend_final_write_processing
4784#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 4785
a27e4371
RM		 4786#include "elf32-target.h"
4787
5a68afcf 4788/* Restore defaults. */
64b384e1 4789#undef elf_backend_object_p
5a68afcf
RM		 4790#undef elf_backend_modify_segment_map
4791#undef elf_backend_modify_program_headers
887badb3 4792#undef elf_backend_final_write_processing
5a68afcf 4793
eac338cf
PB		 4794/* VxWorks support. */
4795
4796#undef TARGET_LITTLE_SYM
6d00b590 4797#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 4798#undef TARGET_LITTLE_NAME
4799#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 4800#undef ELF_OSABI
1587442d
L		 4801#undef ELF_MAXPAGESIZE
4802#define ELF_MAXPAGESIZE 0x1000
a27e4371
RM		 4803#undef elf_backend_plt_alignment
4804#define elf_backend_plt_alignment 4
eac338cf 4805
851b6fa1 4806static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed =
23209a78 4807 {
07d6d2b8 4808 is_vxworks /* os */
23209a78 4809 };
eac338cf 4810
23209a78
RM		 4811#undef elf_backend_arch_data
4812#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 4813
13285a1b 4814#undef elf_backend_relocs_compatible
eac338cf
PB		 4815#undef elf_backend_add_symbol_hook
4816#define elf_backend_add_symbol_hook \
4817 elf_vxworks_add_symbol_hook
4818#undef elf_backend_link_output_symbol_hook
4819#define elf_backend_link_output_symbol_hook \
9c72ff84 4820 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 4821#undef elf_backend_emit_relocs
4822#define elf_backend_emit_relocs elf_vxworks_emit_relocs
4823#undef elf_backend_final_write_processing
4824#define elf_backend_final_write_processing \
4825 elf_vxworks_final_write_processing
7dc98aea 4826#undef elf_backend_static_tls_alignment
eac338cf
PB		 4827
4828/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4829 define it. */
4830#undef elf_backend_want_plt_sym
4831#define elf_backend_want_plt_sym 1
4832
4833#undef elf32_bed
4834#define elf32_bed elf32_i386_vxworks_bed
4835
4836#include "elf32-target.h"
GDB Binutils - Deliverables
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