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[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
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252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
b3adc24a 2 Copyright (C) 1993-2020 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;
382aae06 1229 bfd_boolean abs_symbol;
c175a657
L		 1230 unsigned int r_type;
1231 unsigned int r_symndx;
1232 bfd_vma roff = irel->r_offset;
0a27fed7
L		 1233 bfd_boolean local_ref;
1234 struct elf_x86_link_hash_entry *eh;
c175a657
L		 1235
1236 if (roff < 2)
1237 return TRUE;
1238
7d4d9709 1239 /* Addend for R_386_GOT32X relocations must be 0. */
c175a657
L		 1240 addend = bfd_get_32 (abfd, contents + roff);
1241 if (addend != 0)
1242 return TRUE;
1243
0afcef53 1244 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
c175a657
L		 1245 is_pic = bfd_link_pic (link_info);
1246
6999821f 1247 r_type = *r_type_p;
c175a657
L		 1248 r_symndx = ELF32_R_SYM (irel->r_info);
1249
1250 modrm = bfd_get_8 (abfd, contents + roff - 1);
1251 baseless = (modrm & 0xc7) == 0x5;
1252
382aae06
L		 1253 if (h)
1254 {
1255 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1256 local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
1257 isym = NULL;
1258 abs_symbol = ABS_SYMBOL_P (h);
1259 }
1260 else
1261 {
1262 local_ref = TRUE;
1263 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1264 r_symndx);
1265 abs_symbol = isym->st_shndx == SHN_ABS;
1266 }
1267
7d4d9709 1268 if (baseless && is_pic)
c175a657
L		 1269 {
1270 /* For PIC, disallow R_386_GOT32X without a base register
7d4d9709 1271 since we don't know what the GOT base is. */
c175a657
L		 1272 const char *name;
1273
1274 if (h == NULL)
382aae06 1275 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
c175a657
L		 1276 else
1277 name = h->root.root.string;
1278
4eca0228 1279 _bfd_error_handler
695344c0 1280 /* xgettext:c-format */
871b3ab2 1281 (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
63a5468a 1282 " register can not be used when making a shared object"),
c175a657
L		 1283 abfd, name);
1284 return FALSE;
1285 }
1286
1287 opcode = bfd_get_8 (abfd, contents + roff - 2);
1288
c175a657
L		 1289 /* Convert to R_386_32 if PIC is false or there is no base
1290 register. */
1291 to_reloc_32 = !is_pic || baseless;
1292
0a27fed7
L		 1293 eh = elf_x86_hash_entry (h);
1294
7d4d9709
L		 1295 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1296 reloc. */
c175a657
L		 1297 if (h == NULL)
1298 {
1299 if (opcode == 0x0ff)
1300 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1301 goto convert_branch;
1302 else
1303 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1304 "test %reg1, foo@GOT(%reg2)" and
1305 "binop foo@GOT[(%reg1)], %reg2". */
1306 goto convert_load;
1307 }
1308
1309 /* Undefined weak symbol is only bound locally in executable
1310 and its reference is resolved as 0. */
0a27fed7
L		 1311 if (h->root.type == bfd_link_hash_undefweak
1312 && !eh->linker_def
1313 && local_ref)
c175a657
L		 1314 {
1315 if (opcode == 0xff)
1316 {
1317 /* No direct branch to 0 for PIC. */
1318 if (is_pic)
1319 return TRUE;
1320 else
1321 goto convert_branch;
1322 }
1323 else
1324 {
1325 /* We can convert load of address 0 to R_386_32. */
1326 to_reloc_32 = TRUE;
1327 goto convert_load;
1328 }
1329 }
1330
1331 if (opcode == 0xff)
1332 {
1333 /* We have "call/jmp *foo@GOT[(%reg)]". */
1334 if ((h->root.type == bfd_link_hash_defined
1335 || h->root.type == bfd_link_hash_defweak)
0a27fed7 1336 && local_ref)
c175a657
L		 1337 {
1338 /* The function is locally defined. */
dc1e8a47 1339 convert_branch:
c175a657
L		 1340 /* Convert R_386_GOT32X to R_386_PC32. */
1341 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1342 {
1343 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1344 is a nop prefix. */
1345 modrm = 0xe8;
6eaa7fb5
L		 1346 /* To support TLS optimization, always use addr32 prefix
1347 for "call *___tls_get_addr@GOT(%reg)". */
1d4af308 1348 if (eh && eh->tls_get_addr)
c175a657 1349 {
6eaa7fb5
L		 1350 nop = 0x67;
1351 nop_offset = irel->r_offset - 2;
c175a657
L		 1352 }
1353 else
6eaa7fb5 1354 {
5b9c07b2
L		 1355 nop = htab->params->call_nop_byte;
1356 if (htab->params->call_nop_as_suffix)
6eaa7fb5
L		 1357 {
1358 nop_offset = roff + 3;
1359 irel->r_offset -= 1;
1360 }
1361 else
1362 nop_offset = roff - 2;
1363 }
c175a657
L		 1364 }
1365 else
1366 {
1367 /* Convert to "jmp foo nop". */
1368 modrm = 0xe9;
1369 nop = NOP_OPCODE;
1370 nop_offset = roff + 3;
1371 irel->r_offset -= 1;
1372 }
1373
1374 bfd_put_8 (abfd, nop, contents + nop_offset);
1375 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1376 /* When converting to PC-relative relocation, we
1377 need to adjust addend by -4. */
1378 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1379 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
6999821f 1380 *r_type_p = R_386_PC32;
5e5e02ae 1381 *converted = TRUE;
c175a657
L		 1382 }
1383 }
1384 else
1385 {
1386 /* We have "mov foo@GOT[(%re1g)], %reg2",
1387 "test %reg1, foo@GOT(%reg2)" and
1388 "binop foo@GOT[(%reg1)], %reg2".
1389
1390 Avoid optimizing _DYNAMIC since ld.so may use its
1391 link-time address. */
1392 if (h == htab->elf.hdynamic)
1393 return TRUE;
1394
1395 /* def_regular is set by an assignment in a linker script in
cbd0eecf
L		 1396 bfd_elf_record_link_assignment. start_stop is set on
1397 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1398 if (h->start_stop
0a27fed7 1399 || eh->linker_def
cbd0eecf
L		 1400 || ((h->def_regular
1401 || h->root.type == bfd_link_hash_defined
1402 || h->root.type == bfd_link_hash_defweak)
0a27fed7 1403 && local_ref))
c175a657 1404 {
dc1e8a47 1405 convert_load:
c175a657
L		 1406 if (opcode == 0x8b)
1407 {
382aae06
L		 1408 if (abs_symbol && local_ref)
1409 to_reloc_32 = TRUE;
1410
c175a657
L		 1411 if (to_reloc_32)
1412 {
1413 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1414 "mov $foo, %reg2" with R_386_32. */
1415 r_type = R_386_32;
1416 modrm = 0xc0 | (modrm & 0x38) >> 3;
1417 bfd_put_8 (abfd, modrm, contents + roff - 1);
1418 opcode = 0xc7;
1419 }
1420 else
1421 {
1422 /* Convert "mov foo@GOT(%reg1), %reg2" to
1423 "lea foo@GOTOFF(%reg1), %reg2". */
1424 r_type = R_386_GOTOFF;
1425 opcode = 0x8d;
1426 }
1427 }
1428 else
1429 {
1430 /* Only R_386_32 is supported. */
1431 if (!to_reloc_32)
1432 return TRUE;
1433
1434 if (opcode == 0x85)
1435 {
1436 /* Convert "test %reg1, foo@GOT(%reg2)" to
1437 "test $foo, %reg1". */
1438 modrm = 0xc0 | (modrm & 0x38) >> 3;
1439 opcode = 0xf7;
1440 }
1441 else
1442 {
1443 /* Convert "binop foo@GOT(%reg1), %reg2" to
1444 "binop $foo, %reg2". */
1445 modrm = (0xc0
1446 | (modrm & 0x38) >> 3
1447 | (opcode & 0x3c));
1448 opcode = 0x81;
1449 }
1450 bfd_put_8 (abfd, modrm, contents + roff - 1);
1451 r_type = R_386_32;
1452 }
1453
1454 bfd_put_8 (abfd, opcode, contents + roff - 2);
1455 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
6999821f 1456 *r_type_p = r_type;
5e5e02ae 1457 *converted = TRUE;
c175a657
L		 1458 }
1459 }
1460
1461 return TRUE;
1462}
1463
c1d11331
L		 1464/* Rename some of the generic section flags to better document how they
1465 are used here. */
6999821f 1466#define check_relocs_failed sec_flg0
c1d11331 1467
252b5132 1468/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1469 calculate needed space in the global offset table, procedure linkage
1470 table, and dynamic reloc sections. */
252b5132 1471
b34976b6 1472static bfd_boolean
55fd94b0
AM		 1473elf_i386_check_relocs (bfd *abfd,
1474 struct bfd_link_info *info,
1475 asection *sec,
1476 const Elf_Internal_Rela *relocs)
252b5132 1477{
0afcef53 1478 struct elf_x86_link_hash_table *htab;
252b5132
RH		 1479 Elf_Internal_Shdr *symtab_hdr;
1480 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1481 const Elf_Internal_Rela *rel;
1482 const Elf_Internal_Rela *rel_end;
252b5132 1483 asection *sreloc;
bedfd056 1484 bfd_byte *contents;
5e5e02ae 1485 bfd_boolean converted;
252b5132 1486
0e1862bb 1487 if (bfd_link_relocatable (info))
b34976b6 1488 return TRUE;
252b5132 1489
0afcef53 1490 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6 1491 if (htab == NULL)
c337a162
L		 1492 {
1493 sec->check_relocs_failed = 1;
1494 return FALSE;
1495 }
4dfe6ac6 1496
fe53b4a4
L		 1497 BFD_ASSERT (is_x86_elf (abfd, htab));
1498
bedfd056
L		 1499 /* Get the section contents. */
1500 if (elf_section_data (sec)->this_hdr.contents != NULL)
1501 contents = elf_section_data (sec)->this_hdr.contents;
1502 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1503 {
1504 sec->check_relocs_failed = 1;
1505 return FALSE;
1506 }
1507
0ffa91dd 1508 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1509 sym_hashes = elf_sym_hashes (abfd);
252b5132 1510
5e5e02ae
L		 1511 converted = FALSE;
1512
252b5132
RH		 1513 sreloc = NULL;
1514
1515 rel_end = relocs + sec->reloc_count;
1516 for (rel = relocs; rel < rel_end; rel++)
1517 {
13ae64f3 1518 unsigned int r_type;
d42c267e 1519 unsigned int r_symndx;
252b5132 1520 struct elf_link_hash_entry *h;
0afcef53 1521 struct elf_x86_link_hash_entry *eh;
4c544807
L		 1522 Elf_Internal_Sym *isym;
1523 const char *name;
06a6a421 1524 bfd_boolean size_reloc;
382aae06 1525 bfd_boolean no_dynreloc;
252b5132
RH		 1526
1527 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1528 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1529
d9bc7a44 1530 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1531 {
695344c0 1532 /* xgettext:c-format */
871b3ab2 1533 _bfd_error_handler (_("%pB: bad symbol index: %d"),
4eca0228 1534 abfd, r_symndx);
c337a162 1535 goto error_return;
f5f31454
L		 1536 }
1537
252b5132 1538 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1539 {
1540 /* A local symbol. */
c2e61a4e
L		 1541 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1542 abfd, r_symndx);
1543 if (isym == NULL)
c337a162 1544 goto error_return;
c25bc9fc
L		 1545
1546 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1547 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1548 {
0afcef53 1549 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1550 if (h == NULL)
c337a162 1551 goto error_return;
6bbec505 1552
c25bc9fc 1553 /* Fake a STT_GNU_IFUNC symbol. */
6322e5c5
L		 1554 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1555 isym, NULL);
c25bc9fc
L		 1556 h->type = STT_GNU_IFUNC;
1557 h->def_regular = 1;
1558 h->ref_regular = 1;
1559 h->forced_local = 1;
1560 h->root.type = bfd_link_hash_defined;
1561 }
1562 else
1563 h = NULL;
1564 }
252b5132 1565 else
71cb9464 1566 {
4c544807 1567 isym = NULL;
71cb9464
L		 1568 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1569 while (h->root.type == bfd_link_hash_indirect
1570 || h->root.type == bfd_link_hash_warning)
1571 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1572 }
cbe950e9 1573
0afcef53 1574 eh = (struct elf_x86_link_hash_entry *) h;
c25bc9fc
L		 1575 if (h != NULL)
1576 {
f604c2a2
L		 1577 if (r_type == R_386_GOTOFF)
1578 eh->gotoff_ref = 1;
cbe950e9 1579
ad1e85de
L		 1580 /* It is referenced by a non-shared object. */
1581 h->ref_regular = 1;
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
382aae06
L		 1594 if (!_bfd_elf_x86_valid_reloc_p (sec, info, htab, rel, h, isym,
1595 symtab_hdr, &no_dynreloc))
1596 return FALSE;
1597
bedfd056 1598 if (! elf_i386_tls_transition (info, abfd, sec, contents,
142411ca
L		 1599 symtab_hdr, sym_hashes,
1600 &r_type, GOT_UNKNOWN,
bedfd056 1601 rel, rel_end, h, r_symndx, FALSE))
c337a162 1602 goto error_return;
13ae64f3 1603
cd048363
L		 1604 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1605 if (h == htab->elf.hgot)
1606 htab->got_referenced = TRUE;
1607
13ae64f3 1608 switch (r_type)
252b5132 1609 {
37e55690 1610 case R_386_TLS_LDM:
0f09b4d8 1611 htab->tls_ld_or_ldm_got.refcount = 1;
37e55690
JJ		 1612 goto create_got;
1613
1614 case R_386_PLT32:
1615 /* This symbol requires a procedure linkage table entry. We
1616 actually build the entry in adjust_dynamic_symbol,
1617 because this might be a case of linking PIC code which is
1618 never referenced by a dynamic object, in which case we
1619 don't need to generate a procedure linkage table entry
1620 after all. */
1621
1622 /* If this is a local symbol, we resolve it directly without
1623 creating a procedure linkage table entry. */
1624 if (h == NULL)
1625 continue;
1626
98b273dc 1627 eh->zero_undefweak &= 0x2;
f5385ebf 1628 h->needs_plt = 1;
79b0c981 1629 h->plt.refcount = 1;
37e55690
JJ		 1630 break;
1631
6a3e1bae 1632 case R_386_SIZE32:
06a6a421 1633 size_reloc = TRUE;
6a3e1bae
L		 1634 goto do_size;
1635
13ae64f3 1636 case R_386_TLS_IE_32:
37e55690
JJ		 1637 case R_386_TLS_IE:
1638 case R_386_TLS_GOTIE:
0e1862bb 1639 if (!bfd_link_executable (info))
13ae64f3 1640 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1641 /* Fall through */
1642
252b5132 1643 case R_386_GOT32:
02a86693 1644 case R_386_GOT32X:
13ae64f3 1645 case R_386_TLS_GD:
67a4f2b7
AO		 1646 case R_386_TLS_GOTDESC:
1647 case R_386_TLS_DESC_CALL:
252b5132 1648 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1649 {
1650 int tls_type, old_tls_type;
1651
1652 switch (r_type)
1653 {
1654 default:
02a86693
L		 1655 case R_386_GOT32:
1656 case R_386_GOT32X:
1657 tls_type = GOT_NORMAL;
1658 break;
13ae64f3 1659 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1660 case R_386_TLS_GOTDESC:
1661 case R_386_TLS_DESC_CALL:
1662 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1663 case R_386_TLS_IE_32:
1664 if (ELF32_R_TYPE (rel->r_info) == r_type)
1665 tls_type = GOT_TLS_IE_NEG;
1666 else
ebcfb3c0
JJ		 1667 /* If this is a GD->IE transition, we may use either of
1668 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1669 tls_type = GOT_TLS_IE;
1670 break;
1671 case R_386_TLS_IE:
1672 case R_386_TLS_GOTIE:
1673 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1674 }
1675
1676 if (h != NULL)
1677 {
0f09b4d8 1678 h->got.refcount = 1;
0afcef53 1679 old_tls_type = elf_x86_hash_entry (h)->tls_type;
13ae64f3
JJ		 1680 }
1681 else
1682 {
1683 bfd_signed_vma *local_got_refcounts;
1684
1685 /* This is a global offset table entry for a local symbol. */
1686 local_got_refcounts = elf_local_got_refcounts (abfd);
1687 if (local_got_refcounts == NULL)
1688 {
1689 bfd_size_type size;
1690
1691 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1692 size *= (sizeof (bfd_signed_vma)
1693 + sizeof (bfd_vma) + sizeof(char));
a50b1753 1694 local_got_refcounts = (bfd_signed_vma *)
07d6d2b8 1695 bfd_zalloc (abfd, size);
13ae64f3 1696 if (local_got_refcounts == NULL)
c337a162 1697 goto error_return;
13ae64f3 1698 elf_local_got_refcounts (abfd) = local_got_refcounts;
0afcef53 1699 elf_x86_local_tlsdesc_gotent (abfd)
67a4f2b7 1700 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
0afcef53 1701 elf_x86_local_got_tls_type (abfd)
67a4f2b7 1702 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3 1703 }
0f09b4d8 1704 local_got_refcounts[r_symndx] = 1;
0afcef53 1705 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
13ae64f3
JJ		 1706 }
1707
37e55690
JJ		 1708 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1709 tls_type |= old_tls_type;
13ae64f3
JJ		 1710 /* If a TLS symbol is accessed using IE at least once,
1711 there is no point to use dynamic model for it. */
ebcfb3c0 1712 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1713 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1714 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1715 {
67a4f2b7 1716 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1717 tls_type = old_tls_type;
67a4f2b7
AO		 1718 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1719 && GOT_TLS_GD_ANY_P (tls_type))
1720 tls_type |= old_tls_type;
13ae64f3
JJ		 1721 else
1722 {
09a24cbf 1723 if (h)
4c544807
L		 1724 name = h->root.root.string;
1725 else
1726 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1727 NULL);
4eca0228 1728 _bfd_error_handler
695344c0 1729 /* xgettext:c-format */
871b3ab2 1730 (_("%pB: `%s' accessed both as normal and "
55fd94b0 1731 "thread local symbol"),
4c544807 1732 abfd, name);
68c4a57e 1733 bfd_set_error (bfd_error_bad_value);
c337a162 1734 goto error_return;
13ae64f3
JJ		 1735 }
1736 }
1737
1738 if (old_tls_type != tls_type)
1739 {
1740 if (h != NULL)
0afcef53 1741 elf_x86_hash_entry (h)->tls_type = tls_type;
13ae64f3 1742 else
0afcef53 1743 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
13ae64f3
JJ		 1744 }
1745 }
0ac8d2ca
AM		 1746 /* Fall through */
1747
1748 case R_386_GOTOFF:
1749 case R_386_GOTPC:
dc1e8a47 1750 create_got:
37e55690 1751 if (r_type != R_386_TLS_IE)
aec6b87e
L		 1752 {
1753 if (eh != NULL)
cd048363
L		 1754 {
1755 eh->zero_undefweak &= 0x2;
1756
1757 /* Need GOT to resolve undefined weak symbol to 0. */
1758 if (r_type == R_386_GOTOFF
1759 && h->root.type == bfd_link_hash_undefweak
1760 && bfd_link_executable (info))
1761 htab->got_referenced = TRUE;
1762 }
aec6b87e
L		 1763 break;
1764 }
37e55690 1765 /* Fall through */
252b5132 1766
37e55690
JJ		 1767 case R_386_TLS_LE_32:
1768 case R_386_TLS_LE:
aec6b87e 1769 if (eh != NULL)
98b273dc 1770 eh->zero_undefweak &= 0x2;
0e1862bb 1771 if (bfd_link_executable (info))
37e55690 1772 break;
bffbf940 1773 info->flags |= DF_STATIC_TLS;
aec6b87e 1774 goto do_relocation;
252b5132
RH		 1775
1776 case R_386_32:
1777 case R_386_PC32:
aec6b87e 1778 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
98b273dc 1779 eh->zero_undefweak |= 0x2;
dc1e8a47 1780 do_relocation:
bf52d7c7
L		 1781 /* We are called after all symbols have been resolved. Only
1782 relocation against STT_GNU_IFUNC symbol must go through
1783 PLT. */
d1ed1c7d
L		 1784 if (h != NULL
1785 && (bfd_link_executable (info)
bf52d7c7 1786 || h->type == STT_GNU_IFUNC))
6725bdbf 1787 {
79b0c981 1788 bfd_boolean func_pointer_ref = FALSE;
233cc9c1 1789
4b627c18
L		 1790 if (r_type == R_386_PC32)
1791 {
1792 /* Since something like ".long foo - ." may be used
1793 as pointer, make sure that PLT is used if foo is
1794 a function defined in a shared library. */
1795 if ((sec->flags & SEC_CODE) == 0)
1796 h->pointer_equality_needed = 1;
74437ea2
L		 1797 else if (h->type == STT_GNU_IFUNC
1798 && bfd_link_pic (info))
1799 {
6322e5c5
L		 1800 _bfd_error_handler
1801 /* xgettext:c-format */
871b3ab2 1802 (_("%pB: unsupported non-PIC call to IFUNC `%s'"),
6322e5c5 1803 abfd, h->root.root.string);
74437ea2
L		 1804 bfd_set_error (bfd_error_bad_value);
1805 goto error_return;
1806 }
4b627c18
L		 1807 }
1808 else
04ebc307
L		 1809 {
1810 h->pointer_equality_needed = 1;
1811 /* R_386_32 can be resolved at run-time. */
1812 if (r_type == R_386_32
1813 && (sec->flags & SEC_READONLY) == 0)
79b0c981
L		 1814 func_pointer_ref = TRUE;
1815 }
1816
1817 if (!func_pointer_ref)
1818 {
1819 /* If this reloc is in a read-only section, we might
1820 need a copy reloc. We can't check reliably at this
1821 stage whether the section is read-only, as input
1822 sections have not yet been mapped to output sections.
1823 Tentatively set the flag for now, and correct in
1824 adjust_dynamic_symbol. */
1825 h->non_got_ref = 1;
1826
1827 /* We may need a .plt entry if the symbol is a function
1828 defined in a shared lib or is a function referenced
1829 from the code or read-only section. */
1830 if (!h->def_regular
1831 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1832 h->plt.refcount = 1;
04ebc307 1833 }
6725bdbf 1834 }
7843f00e 1835
06a6a421 1836 size_reloc = FALSE;
dc1e8a47 1837 do_size:
382aae06
L		 1838 if (!no_dynreloc
1839 && NEED_DYNAMIC_RELOCATION_P (info, FALSE, h, sec, r_type,
1840 R_386_32))
252b5132 1841 {
e03a8ed8
L		 1842 struct elf_dyn_relocs *p;
1843 struct elf_dyn_relocs **head;
ec338859 1844
12d0ee4a
AM		 1845 /* We must copy these reloc types into the output file.
1846 Create a reloc section in dynobj and make room for
1847 this reloc. */
252b5132
RH		 1848 if (sreloc == NULL)
1849 {
83bac4b0
NC		 1850 sreloc = _bfd_elf_make_dynamic_reloc_section
1851 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1852
252b5132 1853 if (sreloc == NULL)
c337a162 1854 goto error_return;
252b5132
RH		 1855 }
1856
0c715baa
AM		 1857 /* If this is a global symbol, we count the number of
1858 relocations we need for this symbol. */
1859 if (h != NULL)
252b5132 1860 {
190eb1dd 1861 head = &h->dyn_relocs;
0c715baa
AM		 1862 }
1863 else
1864 {
ec338859
AM		 1865 /* Track dynamic relocs needed for local syms too.
1866 We really need local syms available to do this
1867 easily. Oh well. */
87d72d41 1868 void **vpp;
ec338859 1869 asection *s;
87d72d41
AM		 1870
1871 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1872 abfd, r_symndx);
1873 if (isym == NULL)
c337a162 1874 goto error_return;
87d72d41
AM		 1875
1876 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1877 if (s == NULL)
87d72d41 1878 s = sec;
ec338859 1879
e81d3500 1880 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1881 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 1882 }
1883
1884 p = *head;
1885 if (p == NULL || p->sec != sec)
1886 {
986f0783 1887 size_t amt = sizeof *p;
a50b1753 1888 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
07d6d2b8 1889 amt);
ec338859 1890 if (p == NULL)
c337a162 1891 goto error_return;
ec338859
AM		 1892 p->next = *head;
1893 *head = p;
1894 p->sec = sec;
1895 p->count = 0;
1896 p->pc_count = 0;
252b5132 1897 }
ec338859
AM		 1898
1899 p->count += 1;
06a6a421
L		 1900 /* Count size relocation as PC-relative relocation. */
1901 if (r_type == R_386_PC32 || size_reloc)
ec338859 1902 p->pc_count += 1;
252b5132 1903 }
252b5132
RH		 1904 break;
1905
1906 /* This relocation describes the C++ object vtable hierarchy.
1907 Reconstruct it for later use during GC. */
1908 case R_386_GNU_VTINHERIT:
d17e0c6e 1909 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c337a162 1910 goto error_return;
252b5132
RH		 1911 break;
1912
1913 /* This relocation describes which C++ vtable entries are actually
1914 used. Record for later use during GC. */
1915 case R_386_GNU_VTENTRY:
a0ea3a14 1916 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c337a162 1917 goto error_return;
252b5132
RH		 1918 break;
1919
1920 default:
1921 break;
1922 }
1923 }
1924
bedfd056
L		 1925 if (elf_section_data (sec)->this_hdr.contents != contents)
1926 {
5e5e02ae 1927 if (!converted && !info->keep_memory)
bedfd056
L		 1928 free (contents);
1929 else
1930 {
5e5e02ae
L		 1931 /* Cache the section contents for elf_link_input_bfd if any
1932 load is converted or --no-keep-memory isn't used. */
bedfd056
L		 1933 elf_section_data (sec)->this_hdr.contents = contents;
1934 }
1935 }
1936
5e5e02ae
L		 1937 /* Cache relocations if any load is converted. */
1938 if (elf_section_data (sec)->relocs != relocs && converted)
1939 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
1940
b34976b6 1941 return TRUE;
c337a162 1942
dc1e8a47 1943 error_return:
bedfd056
L		 1944 if (elf_section_data (sec)->this_hdr.contents != contents)
1945 free (contents);
c337a162
L		 1946 sec->check_relocs_failed = 1;
1947 return FALSE;
252b5132
RH		 1948}
1949
38701953
AM		 1950/* Set the correct type for an x86 ELF section. We do this by the
1951 section name, which is a hack, but ought to work. */
1952
b34976b6 1953static bfd_boolean
55fd94b0
AM		 1954elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1955 Elf_Internal_Shdr *hdr,
1956 asection *sec)
38701953 1957{
91d6fa6a 1958 const char *name;
38701953 1959
fd361982 1960 name = bfd_section_name (sec);
38701953
AM		 1961
1962 /* This is an ugly, but unfortunately necessary hack that is
1963 needed when producing EFI binaries on x86. It tells
1964 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1965 containing ELF relocation info. We need this hack in order to
1966 be able to generate ELF binaries that can be translated into
1967 EFI applications (which are essentially COFF objects). Those
1968 files contain a COFF ".reloc" section inside an ELFNN object,
1969 which would normally cause BFD to segfault because it would
1970 attempt to interpret this section as containing relocation
1971 entries for section "oc". With this hack enabled, ".reloc"
1972 will be treated as a normal data section, which will avoid the
1973 segfault. However, you won't be able to create an ELFNN binary
1974 with a section named "oc" that needs relocations, but that's
1975 the kind of ugly side-effects you get when detecting section
1976 types based on their names... In practice, this limitation is
1977 unlikely to bite. */
1978 if (strcmp (name, ".reloc") == 0)
1979 hdr->sh_type = SHT_PROGBITS;
1980
b34976b6 1981 return TRUE;
38701953
AM		 1982}
1983
13ae64f3
JJ		 1984/* Return the relocation value for @tpoff relocation
1985 if STT_TLS virtual address is ADDRESS. */
1986
1987static bfd_vma
eb4ff4d6 1988elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 1989{
e1918d23 1990 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 1991 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
1992 bfd_vma static_tls_size;
13ae64f3 1993
e1918d23
AM		 1994 /* If tls_sec is NULL, we should have signalled an error already. */
1995 if (htab->tls_sec == NULL)
6a30718d 1996 return 0;
7dc98aea
RO		 1997
1998 /* Consider special static TLS alignment requirements. */
1999 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2000 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 2001}
2002
252b5132
RH		 2003/* Relocate an i386 ELF section. */
2004
b34976b6 2005static bfd_boolean
55fd94b0
AM		 2006elf_i386_relocate_section (bfd *output_bfd,
2007 struct bfd_link_info *info,
2008 bfd *input_bfd,
2009 asection *input_section,
2010 bfd_byte *contents,
2011 Elf_Internal_Rela *relocs,
2012 Elf_Internal_Sym *local_syms,
2013 asection **local_sections)
252b5132 2014{
0afcef53 2015 struct elf_x86_link_hash_table *htab;
252b5132
RH		 2016 Elf_Internal_Shdr *symtab_hdr;
2017 struct elf_link_hash_entry **sym_hashes;
2018 bfd_vma *local_got_offsets;
67a4f2b7 2019 bfd_vma *local_tlsdesc_gotents;
252b5132 2020 Elf_Internal_Rela *rel;
60f2e42e 2021 Elf_Internal_Rela *wrel;
252b5132 2022 Elf_Internal_Rela *relend;
3348747a 2023 bfd_boolean is_vxworks_tls;
25e762b9 2024 unsigned plt_entry_size;
252b5132 2025
c337a162
L		 2026 /* Skip if check_relocs failed. */
2027 if (input_section->check_relocs_failed)
2028 return FALSE;
2029
0afcef53 2030 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2031 if (htab == NULL)
2032 return FALSE;
fe53b4a4 2033
7af5d5c4
AM		 2034 if (!is_x86_elf (input_bfd, htab))
2035 {
2036 bfd_set_error (bfd_error_wrong_format);
2037 return FALSE;
2038 }
fe53b4a4 2039
0ffa91dd 2040 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 2041 sym_hashes = elf_sym_hashes (input_bfd);
2042 local_got_offsets = elf_local_got_offsets (input_bfd);
0afcef53 2043 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 2044 /* We have to handle relocations in vxworks .tls_vars sections
2045 specially, because the dynamic loader is 'weird'. */
851b6fa1 2046 is_vxworks_tls = (htab->target_os == is_vxworks
07d6d2b8 2047 && bfd_link_pic (info)
3348747a
NS		 2048 && !strcmp (input_section->output_section->name,
2049 ".tls_vars"));
252b5132 2050
0afcef53 2051 _bfd_x86_elf_set_tls_module_base (info);
9f03412a 2052
765e526c 2053 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 2054
60f2e42e 2055 rel = wrel = relocs;
252b5132 2056 relend = relocs + input_section->reloc_count;
60f2e42e 2057 for (; rel < relend; wrel++, rel++)
252b5132 2058 {
419414ea 2059 unsigned int r_type, r_type_tls;
252b5132
RH		 2060 reloc_howto_type *howto;
2061 unsigned long r_symndx;
2062 struct elf_link_hash_entry *h;
0afcef53 2063 struct elf_x86_link_hash_entry *eh;
252b5132
RH		 2064 Elf_Internal_Sym *sym;
2065 asection *sec;
dd7e64d4 2066 bfd_vma off, offplt, plt_offset;
252b5132 2067 bfd_vma relocation;
b34976b6 2068 bfd_boolean unresolved_reloc;
252b5132 2069 bfd_reloc_status_type r;
1b452ec6 2070 unsigned int indx;
13ae64f3 2071 int tls_type;
1788fc08 2072 bfd_vma st_size;
dd7e64d4 2073 asection *resolved_plt;
aec6b87e 2074 bfd_boolean resolved_to_zero;
e133d005 2075 bfd_boolean relative_reloc;
252b5132
RH		 2076
2077 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 2078 if (r_type == R_386_GNU_VTINHERIT
2079 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 2080 {
2081 if (wrel != rel)
2082 *wrel = *rel;
2083 continue;
2084 }
dc47f327 2085
b366503e 2086 howto = elf_i386_rtype_to_howto (r_type);
76268e02 2087 if (howto == NULL)
47aeb64c
NC		 2088 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2089
252b5132 2090 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 2091 h = NULL;
2092 sym = NULL;
2093 sec = NULL;
b34976b6 2094 unresolved_reloc = FALSE;
252b5132
RH		 2095 if (r_symndx < symtab_hdr->sh_info)
2096 {
2097 sym = local_syms + r_symndx;
2098 sec = local_sections[r_symndx];
2099 relocation = (sec->output_section->vma
2100 + sec->output_offset
2101 + sym->st_value);
1788fc08 2102 st_size = sym->st_size;
ab96bf03
AM		 2103
2104 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2105 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 2106 || (bfd_link_relocatable (info)
ab96bf03 2107 && sec->output_offset != 0)))
f8df10f4 2108 {
f8df10f4 2109 bfd_vma addend;
4a335f3d 2110 bfd_byte *where = contents + rel->r_offset;
f8df10f4 2111
4a335f3d 2112 switch (howto->size)
f8df10f4 2113 {
4a335f3d
AM		 2114 case 0:
2115 addend = bfd_get_8 (input_bfd, where);
2116 if (howto->pc_relative)
2117 {
2118 addend = (addend ^ 0x80) - 0x80;
2119 addend += 1;
2120 }
2121 break;
2122 case 1:
2123 addend = bfd_get_16 (input_bfd, where);
2124 if (howto->pc_relative)
2125 {
2126 addend = (addend ^ 0x8000) - 0x8000;
2127 addend += 2;
2128 }
2129 break;
2130 case 2:
2131 addend = bfd_get_32 (input_bfd, where);
2132 if (howto->pc_relative)
2133 {
2134 addend = (addend ^ 0x80000000) - 0x80000000;
2135 addend += 4;
2136 }
2137 break;
2138 default:
2139 abort ();
f8df10f4
JJ		 2140 }
2141
0e1862bb 2142 if (bfd_link_relocatable (info))
ab96bf03
AM		 2143 addend += sec->output_offset;
2144 else
2145 {
2146 asection *msec = sec;
2147 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2148 addend);
2149 addend -= relocation;
2150 addend += msec->output_section->vma + msec->output_offset;
2151 }
4a335f3d
AM		 2152
2153 switch (howto->size)
2154 {
2155 case 0:
16a10388 2156 /* FIXME: overflow checks. */
4a335f3d
AM		 2157 if (howto->pc_relative)
2158 addend -= 1;
2159 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 2160 break;
2161 case 1:
2162 if (howto->pc_relative)
2163 addend -= 2;
2164 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 2165 break;
2166 case 2:
2167 if (howto->pc_relative)
2168 addend -= 4;
2169 bfd_put_32 (input_bfd, addend, where);
2170 break;
2171 }
f8df10f4 2172 }
0e1862bb 2173 else if (!bfd_link_relocatable (info)
1f85278f 2174 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 2175 {
2176 /* Relocate against local STT_GNU_IFUNC symbol. */
0afcef53
L		 2177 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2178 FALSE);
c25bc9fc
L		 2179 if (h == NULL)
2180 abort ();
2181
23209a78 2182 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 2183 h->root.u.def.value = sym->st_value;
2184 h->root.u.def.section = sec;
2185 }
252b5132
RH		 2186 }
2187 else
2188 {
3d540e93 2189 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 2190 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 2191
b2a8e766
AM		 2192 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2193 r_symndx, symtab_hdr, sym_hashes,
2194 h, sec, relocation,
62d887d4 2195 unresolved_reloc, warned, ignored);
1788fc08 2196 st_size = h->size;
252b5132
RH		 2197 }
2198
dbaa2011 2199 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 2200 {
2201 _bfd_clear_contents (howto, input_bfd, input_section,
0930cb30 2202 contents, rel->r_offset);
60f2e42e
L		 2203 wrel->r_offset = rel->r_offset;
2204 wrel->r_info = 0;
2205 wrel->r_addend = 0;
2206
2207 /* For ld -r, remove relocations in debug sections against
2208 sections defined in discarded sections. Not done for
2209 eh_frame editing code expects to be present. */
2210 if (bfd_link_relocatable (info)
2211 && (input_section->flags & SEC_DEBUGGING))
2212 wrel--;
2213
2214 continue;
2215 }
9635fe29 2216
0e1862bb 2217 if (bfd_link_relocatable (info))
2d5da473
L		 2218 {
2219 if (wrel != rel)
2220 *wrel = *rel;
2221 continue;
2222 }
ab96bf03 2223
0afcef53 2224 eh = (struct elf_x86_link_hash_entry *) h;
ee2fdd6f 2225
cbe950e9
L		 2226 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2227 it here if it is defined in a non-shared object. */
2228 if (h != NULL
2229 && h->type == STT_GNU_IFUNC
2230 && h->def_regular)
2231 {
ee2fdd6f 2232 asection *gotplt, *base_got;
cbe950e9 2233 bfd_vma plt_index;
4c544807 2234 const char *name;
cbe950e9 2235
97dc35c8
L		 2236 if ((input_section->flags & SEC_ALLOC) == 0)
2237 {
347a8774
L		 2238 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2239 STT_GNU_IFUNC symbol as STT_FUNC. */
2240 if (elf_section_type (input_section) == SHT_NOTE)
2241 goto skip_ifunc;
97dc35c8
L		 2242 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2243 sections because such sections are not SEC_ALLOC and
2244 thus ld.so will not process them. */
2245 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 2246 continue;
97dc35c8
L		 2247 abort ();
2248 }
cbe950e9
L		 2249
2250 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 2251 if (htab->elf.splt != NULL)
cbe950e9 2252 {
ee2fdd6f
L		 2253 if (htab->plt_second != NULL)
2254 {
2255 resolved_plt = htab->plt_second;
2256 plt_offset = eh->plt_second.offset;
2257 }
2258 else
2259 {
2260 resolved_plt = htab->elf.splt;
2261 plt_offset = h->plt.offset;
2262 }
6de2ae4a 2263 gotplt = htab->elf.sgotplt;
cbe950e9
L		 2264 }
2265 else
2266 {
ee2fdd6f
L		 2267 resolved_plt = htab->elf.iplt;
2268 plt_offset = h->plt.offset;
6de2ae4a 2269 gotplt = htab->elf.igotplt;
cbe950e9
L		 2270 }
2271
cbe950e9
L		 2272 switch (r_type)
2273 {
2274 default:
233cc9c1 2275 break;
cbe950e9
L		 2276
2277 case R_386_GOT32:
02a86693 2278 case R_386_GOT32X:
6de2ae4a 2279 base_got = htab->elf.sgot;
cbe950e9
L		 2280 off = h->got.offset;
2281
7afd84dc 2282 if (base_got == NULL)
cbe950e9
L		 2283 abort ();
2284
7afd84dc 2285 if (off == (bfd_vma) -1)
cbe950e9 2286 {
7afd84dc
L		 2287 /* We can't use h->got.offset here to save state, or
2288 even just remember the offset, as finish_dynamic_symbol
2289 would use that as offset into .got. */
6bbec505 2290
233cc9c1
L		 2291 if (h->plt.offset == (bfd_vma) -1)
2292 abort ();
2293
6de2ae4a 2294 if (htab->elf.splt != NULL)
7afd84dc 2295 {
f604c2a2 2296 plt_index = (h->plt.offset / plt_entry_size
765e526c 2297 - htab->plt.has_plt0);
7afd84dc 2298 off = (plt_index + 3) * 4;
6de2ae4a 2299 base_got = htab->elf.sgotplt;
7afd84dc 2300 }
cbe950e9
L		 2301 else
2302 {
25e762b9 2303 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 2304 off = plt_index * 4;
6de2ae4a 2305 base_got = htab->elf.igotplt;
7afd84dc
L		 2306 }
2307
2308 if (h->dynindx == -1
2309 || h->forced_local
2310 || info->symbolic)
2311 {
2312 /* This references the local defitionion. We must
2313 initialize this entry in the global offset table.
2314 Since the offset must always be a multiple of 8,
2315 we use the least significant bit to record
2316 whether we have initialized it already.
2317
2318 When doing a dynamic link, we create a .rela.got
2319 relocation entry to initialize the value. This
2320 is done in the finish_dynamic_symbol routine. */
2321 if ((off & 1) != 0)
2322 off &= ~1;
2323 else
2324 {
2325 bfd_put_32 (output_bfd, relocation,
2326 base_got->contents + off);
2327 h->got.offset |= 1;
2328 }
cbe950e9 2329 }
cbe950e9 2330
7afd84dc 2331 relocation = off;
7afd84dc
L		 2332 }
2333 else
ca8c86ef
L		 2334 relocation = (base_got->output_section->vma
2335 + base_got->output_offset + off
2336 - gotplt->output_section->vma
2337 - gotplt->output_offset);
2338
2a568401
L		 2339 if (rel->r_offset > 1
2340 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2341 && *(contents + rel->r_offset - 2) != 0x8d)
712ec279
L		 2342 {
2343 if (bfd_link_pic (info))
2344 goto disallow_got32;
2345
2346 /* Add the GOT base if there is no base register. */
2347 relocation += (gotplt->output_section->vma
2348 + gotplt->output_offset);
2349 }
2350 else if (htab->elf.splt == NULL)
2351 {
2352 /* Adjust for static executables. */
2353 relocation += gotplt->output_offset;
2354 }
0018b0a3 2355
cbe950e9 2356 goto do_relocation;
233cc9c1
L		 2357 }
2358
2359 if (h->plt.offset == (bfd_vma) -1)
2360 {
2361 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2362 if (r_type == R_386_32
2363 && (input_section->flags & SEC_CODE) == 0)
2364 goto do_ifunc_pointer;
2365 goto bad_ifunc_reloc;
2366 }
2367
ee2fdd6f
L		 2368 relocation = (resolved_plt->output_section->vma
2369 + resolved_plt->output_offset + plt_offset);
233cc9c1
L		 2370
2371 switch (r_type)
2372 {
2373 default:
dc1e8a47 2374 bad_ifunc_reloc:
233cc9c1
L		 2375 if (h->root.root.string)
2376 name = h->root.root.string;
2377 else
2378 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2379 NULL);
4eca0228 2380 _bfd_error_handler
695344c0 2381 /* xgettext:c-format */
871b3ab2 2382 (_("%pB: relocation %s against STT_GNU_IFUNC "
233cc9c1
L		 2383 "symbol `%s' isn't supported"), input_bfd,
2384 howto->name, name);
2385 bfd_set_error (bfd_error_bad_value);
2386 return FALSE;
2387
2388 case R_386_32:
2389 /* Generate dynamic relcoation only when there is a
2390 non-GOT reference in a shared object. */
2391 if ((bfd_link_pic (info) && h->non_got_ref)
2392 || h->plt.offset == (bfd_vma) -1)
2393 {
2394 Elf_Internal_Rela outrel;
2395 asection *sreloc;
2396 bfd_vma offset;
2397
dc1e8a47 2398 do_ifunc_pointer:
233cc9c1
L		 2399 /* Need a dynamic relocation to get the real function
2400 adddress. */
2401 offset = _bfd_elf_section_offset (output_bfd,
2402 info,
2403 input_section,
2404 rel->r_offset);
2405 if (offset == (bfd_vma) -1
2406 || offset == (bfd_vma) -2)
2407 abort ();
2408
2409 outrel.r_offset = (input_section->output_section->vma
2410 + input_section->output_offset
2411 + offset);
2412
cf1070f1 2413 if (POINTER_LOCAL_IFUNC_P (info, h))
233cc9c1 2414 {
871b3ab2 2415 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 2416 h->root.root.string,
2417 h->root.u.def.section->owner);
2418
233cc9c1
L		 2419 /* This symbol is resolved locally. */
2420 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2421 bfd_put_32 (output_bfd,
2422 (h->root.u.def.value
2423 + h->root.u.def.section->output_section->vma
2424 + h->root.u.def.section->output_offset),
2425 contents + offset);
2426 }
2427 else
2428 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2429
2430 /* Dynamic relocations are stored in
2431 1. .rel.ifunc section in PIC object.
2432 2. .rel.got section in dynamic executable.
2433 3. .rel.iplt section in static executable. */
2434 if (bfd_link_pic (info))
2435 sreloc = htab->elf.irelifunc;
2436 else if (htab->elf.splt != NULL)
2437 sreloc = htab->elf.srelgot;
2438 else
2439 sreloc = htab->elf.irelplt;
2440 elf_append_rel (output_bfd, sreloc, &outrel);
2441
2442 /* If this reloc is against an external symbol, we
2443 do not want to fiddle with the addend. Otherwise,
2444 we need to include the symbol value so that it
2445 becomes an addend for the dynamic reloc. For an
2446 internal symbol, we have updated addend. */
2447 continue;
2448 }
2449 /* FALLTHROUGH */
2450 case R_386_PC32:
2451 case R_386_PLT32:
2452 goto do_relocation;
cbe950e9
L		 2453
2454 case R_386_GOTOFF:
2455 relocation -= (gotplt->output_section->vma
2456 + gotplt->output_offset);
2457 goto do_relocation;
2458 }
2459 }
2460
dc1e8a47 2461 skip_ifunc:
aec6b87e 2462 resolved_to_zero = (eh != NULL
c5bce5c6 2463 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
aec6b87e 2464
252b5132
RH		 2465 switch (r_type)
2466 {
02a86693 2467 case R_386_GOT32X:
252b5132
RH		 2468 case R_386_GOT32:
2469 /* Relocation is to the entry for this symbol in the global
2470 offset table. */
6de2ae4a 2471 if (htab->elf.sgot == NULL)
ffb2e45b 2472 abort ();
252b5132 2473
e133d005 2474 relative_reloc = FALSE;
252b5132
RH		 2475 if (h != NULL)
2476 {
252b5132 2477 off = h->got.offset;
2eba97c2 2478 if (RESOLVED_LOCALLY_P (info, h, htab))
252b5132 2479 {
2eba97c2
L		 2480 /* We must initialize this entry in the global offset
2481 table. Since the offset must always be a multiple
2482 of 4, we use the least significant bit to record
2483 whether we have initialized it already.
252b5132
RH		 2484
2485 When doing a dynamic link, we create a .rel.got
2486 relocation entry to initialize the value. This
2487 is done in the finish_dynamic_symbol routine. */
2488 if ((off & 1) != 0)
2489 off &= ~1;
2490 else
2491 {
2492 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2493 htab->elf.sgot->contents + off);
252b5132 2494 h->got.offset |= 1;
e133d005 2495
f70656b2 2496 if (GENERATE_RELATIVE_RELOC_P (info, h))
e133d005
L		 2497 {
2498 /* PR ld/21402: If this symbol isn't dynamic
0dc9a308 2499 in PIC, generate R_386_RELATIVE here. */
e133d005
L		 2500 eh->no_finish_dynamic_symbol = 1;
2501 relative_reloc = TRUE;
2502 }
252b5132
RH		 2503 }
2504 }
8c694914 2505 else
b34976b6 2506 unresolved_reloc = FALSE;
252b5132
RH		 2507 }
2508 else
2509 {
ffb2e45b
AM		 2510 if (local_got_offsets == NULL)
2511 abort ();
252b5132
RH		 2512
2513 off = local_got_offsets[r_symndx];
2514
2515 /* The offset must always be a multiple of 4. We use
83be169b
AM		 2516 the least significant bit to record whether we have
2517 already generated the necessary reloc. */
252b5132
RH		 2518 if ((off & 1) != 0)
2519 off &= ~1;
2520 else
2521 {
6725bdbf 2522 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2523 htab->elf.sgot->contents + off);
e133d005 2524 local_got_offsets[r_symndx] |= 1;
252b5132 2525
0e1862bb 2526 if (bfd_link_pic (info))
e133d005 2527 relative_reloc = TRUE;
252b5132 2528 }
252b5132
RH		 2529 }
2530
e133d005
L		 2531 if (relative_reloc)
2532 {
2533 asection *s;
2534 Elf_Internal_Rela outrel;
2535
2536 s = htab->elf.srelgot;
2537 if (s == NULL)
2538 abort ();
2539
2540 outrel.r_offset = (htab->elf.sgot->output_section->vma
2541 + htab->elf.sgot->output_offset
2542 + off);
2543 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2544 elf_append_rel (output_bfd, s, &outrel);
2545 }
2546
ffb2e45b
AM		 2547 if (off >= (bfd_vma) -2)
2548 abort ();
2549
74d7f0aa
L		 2550 relocation = (htab->elf.sgot->output_section->vma
2551 + htab->elf.sgot->output_offset + off);
2a568401
L		 2552 if (rel->r_offset > 1
2553 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2554 && *(contents + rel->r_offset - 2) != 0x8d)
74d7f0aa
L		 2555 {
2556 if (bfd_link_pic (info))
2557 {
2558 /* For PIC, disallow R_386_GOT32 without a base
2a568401
L		 2559 register, except for "lea foo@GOT, %reg", since
2560 we don't know what the GOT base is. */
74d7f0aa
L		 2561 const char *name;
2562
dc1e8a47 2563 disallow_got32:
a5def14f 2564 if (h == NULL || h->root.root.string == NULL)
74d7f0aa
L		 2565 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2566 NULL);
2567 else
2568 name = h->root.root.string;
2569
4eca0228 2570 _bfd_error_handler
695344c0 2571 /* xgettext:c-format */
871b3ab2 2572 (_("%pB: direct GOT relocation %s against `%s'"
63a5468a
AM		 2573 " without base register can not be used"
2574 " when making a shared object"),
712ec279 2575 input_bfd, howto->name, name);
74d7f0aa
L		 2576 bfd_set_error (bfd_error_bad_value);
2577 return FALSE;
2578 }
2579 }
2580 else
2581 {
2582 /* Subtract the .got.plt section address only with a base
2583 register. */
2584 relocation -= (htab->elf.sgotplt->output_section->vma
2585 + htab->elf.sgotplt->output_offset);
2586 }
2587
252b5132
RH		 2588 break;
2589
2590 case R_386_GOTOFF:
2591 /* Relocation is relative to the start of the global offset
2592 table. */
2593
3d949995
L		 2594 /* Check to make sure it isn't a protected function or data
2595 symbol for shared library since it may not be local when
2596 used as function address or with copy relocation. We also
e3c0e327 2597 need to make sure that a symbol is referenced locally. */
0e1862bb 2598 if (!bfd_link_executable (info) && h)
90f487df 2599 {
41bed6dd
L		 2600 if (!h->def_regular)
2601 {
2602 const char *v;
2603
2604 switch (ELF_ST_VISIBILITY (h->other))
2605 {
2606 case STV_HIDDEN:
2607 v = _("hidden symbol");
2608 break;
2609 case STV_INTERNAL:
2610 v = _("internal symbol");
2611 break;
2612 case STV_PROTECTED:
2613 v = _("protected symbol");
2614 break;
2615 default:
2616 v = _("symbol");
2617 break;
2618 }
2619
4eca0228 2620 _bfd_error_handler
695344c0 2621 /* xgettext:c-format */
871b3ab2 2622 (_("%pB: relocation R_386_GOTOFF against undefined %s"
63a5468a 2623 " `%s' can not be used when making a shared object"),
41bed6dd
L		 2624 input_bfd, v, h->root.root.string);
2625 bfd_set_error (bfd_error_bad_value);
2626 return FALSE;
2627 }
6999821f 2628 else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
3d949995
L		 2629 && (h->type == STT_FUNC
2630 || h->type == STT_OBJECT)
41bed6dd
L		 2631 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2632 {
4eca0228 2633 _bfd_error_handler
695344c0 2634 /* xgettext:c-format */
871b3ab2 2635 (_("%pB: relocation R_386_GOTOFF against protected %s"
63a5468a 2636 " `%s' can not be used when making a shared object"),
3d949995
L		 2637 input_bfd,
2638 h->type == STT_FUNC ? "function" : "data",
2639 h->root.root.string);
41bed6dd
L		 2640 bfd_set_error (bfd_error_bad_value);
2641 return FALSE;
2642 }
90f487df
L		 2643 }
2644
8c37241b
JJ		 2645 /* Note that sgot is not involved in this
2646 calculation. We always want the start of .got.plt. If we
2647 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 2648 permitted by the ABI, we might have to change this
2649 calculation. */
6de2ae4a
L		 2650 relocation -= htab->elf.sgotplt->output_section->vma
2651 + htab->elf.sgotplt->output_offset;
252b5132
RH		 2652 break;
2653
2654 case R_386_GOTPC:
2655 /* Use global offset table as symbol value. */
6de2ae4a
L		 2656 relocation = htab->elf.sgotplt->output_section->vma
2657 + htab->elf.sgotplt->output_offset;
b34976b6 2658 unresolved_reloc = FALSE;
252b5132
RH		 2659 break;
2660
2661 case R_386_PLT32:
2662 /* Relocation is to the entry for this symbol in the
2663 procedure linkage table. */
2664
dd5724d5 2665 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 2666 without using the procedure linkage table. */
252b5132
RH		 2667 if (h == NULL)
2668 break;
2669
dd7e64d4
L		 2670 if ((h->plt.offset == (bfd_vma) -1
2671 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 2672 || htab->elf.splt == NULL)
252b5132
RH		 2673 {
2674 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 2675 happens when statically linking PIC code, or when
2676 using -Bsymbolic. */
252b5132
RH		 2677 break;
2678 }
2679
dd7e64d4
L		 2680 if (h->plt.offset != (bfd_vma) -1)
2681 {
ee2fdd6f
L		 2682 if (htab->plt_second != NULL)
2683 {
2684 resolved_plt = htab->plt_second;
2685 plt_offset = eh->plt_second.offset;
2686 }
2687 else
2688 {
2689 resolved_plt = htab->elf.splt;
2690 plt_offset = h->plt.offset;
2691 }
dd7e64d4
L		 2692 }
2693 else
2694 {
2695 resolved_plt = htab->plt_got;
2696 plt_offset = eh->plt_got.offset;
2697 }
2698
2699 relocation = (resolved_plt->output_section->vma
2700 + resolved_plt->output_offset
2701 + plt_offset);
b34976b6 2702 unresolved_reloc = FALSE;
252b5132
RH		 2703 break;
2704
1788fc08 2705 case R_386_SIZE32:
1788fc08
L		 2706 /* Set to symbol size. */
2707 relocation = st_size;
2708 /* Fall through. */
2709
252b5132
RH		 2710 case R_386_32:
2711 case R_386_PC32:
3348747a
NS		 2712 if ((input_section->flags & SEC_ALLOC) == 0
2713 || is_vxworks_tls)
ec338859
AM		 2714 break;
2715
382aae06 2716 if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, sec,
aebcc8ff
L		 2717 FALSE, resolved_to_zero,
2718 (r_type == R_386_PC32)))
252b5132 2719 {
947216bf 2720 Elf_Internal_Rela outrel;
b34976b6 2721 bfd_boolean skip, relocate;
0c715baa 2722 asection *sreloc;
252b5132
RH		 2723
2724 /* When generating a shared object, these relocations
2725 are copied into the output file to be resolved at run
2726 time. */
2727
b34976b6
AM		 2728 skip = FALSE;
2729 relocate = FALSE;
252b5132 2730
c629eae0
JJ		 2731 outrel.r_offset =
2732 _bfd_elf_section_offset (output_bfd, info, input_section,
2733 rel->r_offset);
2734 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2735 skip = TRUE;
0bb2d96a 2736 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2737 skip = TRUE, relocate = TRUE;
252b5132
RH		 2738 outrel.r_offset += (input_section->output_section->vma
2739 + input_section->output_offset);
2740
2741 if (skip)
0bb2d96a 2742 memset (&outrel, 0, sizeof outrel);
e74399c4 2743 else if (COPY_INPUT_RELOC_P (info, h, r_type))
0bb2d96a 2744 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2745 else
2746 {
5a15f56f 2747 /* This symbol is local, or marked to become local. */
b34976b6 2748 relocate = TRUE;
5a15f56f 2749 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 2750 }
2751
cbe950e9 2752 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 2753
62d78908
L		 2754 if (sreloc == NULL || sreloc->contents == NULL)
2755 {
2756 r = bfd_reloc_notsupported;
2757 goto check_relocation_error;
2758 }
0c715baa 2759
59d6ffb2 2760 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 2761
2762 /* If this reloc is against an external symbol, we do
2763 not want to fiddle with the addend. Otherwise, we
2764 need to include the symbol value so that it becomes
2765 an addend for the dynamic reloc. */
0f88be7a 2766 if (! relocate)
252b5132
RH		 2767 continue;
2768 }
252b5132
RH		 2769 break;
2770
37e55690 2771 case R_386_TLS_IE:
0e1862bb 2772 if (!bfd_link_executable (info))
37e55690 2773 {
947216bf 2774 Elf_Internal_Rela outrel;
37e55690 2775 asection *sreloc;
37e55690
JJ		 2776
2777 outrel.r_offset = rel->r_offset
2778 + input_section->output_section->vma
2779 + input_section->output_offset;
2780 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2781 sreloc = elf_section_data (input_section)->sreloc;
2782 if (sreloc == NULL)
2783 abort ();
59d6ffb2 2784 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 2785 }
2786 /* Fall through */
2787
13ae64f3 2788 case R_386_TLS_GD:
67a4f2b7
AO		 2789 case R_386_TLS_GOTDESC:
2790 case R_386_TLS_DESC_CALL:
13ae64f3 2791 case R_386_TLS_IE_32:
37e55690 2792 case R_386_TLS_GOTIE:
13ae64f3
JJ		 2793 tls_type = GOT_UNKNOWN;
2794 if (h == NULL && local_got_offsets)
0afcef53 2795 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
13ae64f3 2796 else if (h != NULL)
0afcef53 2797 tls_type = elf_x86_hash_entry(h)->tls_type;
37e55690
JJ		 2798 if (tls_type == GOT_TLS_IE)
2799 tls_type = GOT_TLS_IE_NEG;
142411ca 2800
419414ea 2801 r_type_tls = r_type;
142411ca
L		 2802 if (! elf_i386_tls_transition (info, input_bfd,
2803 input_section, contents,
2804 symtab_hdr, sym_hashes,
419414ea 2805 &r_type_tls, tls_type, rel,
bedfd056 2806 relend, h, r_symndx, TRUE))
142411ca 2807 return FALSE;
13ae64f3 2808
419414ea 2809 if (r_type_tls == R_386_TLS_LE_32)
13ae64f3 2810 {
82e51918 2811 BFD_ASSERT (! unresolved_reloc);
419414ea 2812 if (r_type == R_386_TLS_GD)
13ae64f3 2813 {
142411ca 2814 unsigned int type;
13ae64f3
JJ		 2815 bfd_vma roff;
2816
2817 /* GD->LE transition. */
6eaa7fb5 2818 type = *(contents + rel->r_offset - 2);
13ae64f3
JJ		 2819 if (type == 0x04)
2820 {
6eaa7fb5
L		 2821 /* Change
2822 leal foo@tlsgd(,%ebx,1), %eax
2823 call ___tls_get_addr@PLT
2824 into:
2825 movl %gs:0, %eax
2826 subl $foo@tpoff, %eax
13ae64f3 2827 (6 byte form of subl). */
142411ca 2828 roff = rel->r_offset + 5;
13ae64f3
JJ		 2829 }
2830 else
2831 {
6eaa7fb5
L		 2832 /* Change
2833 leal foo@tlsgd(%ebx), %eax
2834 call ___tls_get_addr@PLT
2835 nop
2836 or
2837 leal foo@tlsgd(%reg), %eax
2838 call *___tls_get_addr@GOT(%reg)
2839 which may be converted to
2840 addr32 call ___tls_get_addr
2841 into:
2842 movl %gs:0, %eax; subl $foo@tpoff, %eax
142411ca 2843 (6 byte form of subl). */
142411ca 2844 roff = rel->r_offset + 6;
13ae64f3 2845 }
6eaa7fb5
L		 2846 memcpy (contents + roff - 8,
2847 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
eb4ff4d6 2848 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 2849 contents + roff);
6eaa7fb5 2850 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
13ae64f3 2851 rel++;
60f2e42e 2852 wrel++;
13ae64f3
JJ		 2853 continue;
2854 }
419414ea 2855 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 2856 {
2857 /* GDesc -> LE transition.
2858 It's originally something like:
2859 leal x@tlsdesc(%ebx), %eax
2860
2861 leal x@ntpoff, %eax
2862
2863 Registers other than %eax may be set up here. */
2864
142411ca 2865 unsigned int val;
67a4f2b7
AO		 2866 bfd_vma roff;
2867
67a4f2b7 2868 roff = rel->r_offset;
67a4f2b7 2869 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 2870
2871 /* Now modify the instruction as appropriate. */
2872 /* aoliva FIXME: remove the above and xor the byte
2873 below with 0x86. */
2874 bfd_put_8 (output_bfd, val ^ 0x86,
2875 contents + roff - 1);
eb4ff4d6 2876 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 2877 contents + roff);
2878 continue;
2879 }
419414ea 2880 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 2881 {
2882 /* GDesc -> LE transition.
2883 It's originally:
2884 call *(%eax)
2885 Turn it into:
142411ca 2886 xchg %ax,%ax */
67a4f2b7 2887
67a4f2b7 2888 bfd_vma roff;
6bbec505 2889
67a4f2b7 2890 roff = rel->r_offset;
10efb593 2891 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 2892 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2893 continue;
2894 }
419414ea 2895 else if (r_type == R_386_TLS_IE)
13ae64f3 2896 {
142411ca 2897 unsigned int val;
13ae64f3
JJ		 2898
2899 /* IE->LE transition:
37e55690
JJ		 2900 Originally it can be one of:
2901 movl foo, %eax
2902 movl foo, %reg
2903 addl foo, %reg
2904 We change it into:
2905 movl $foo, %eax
2906 movl $foo, %reg
2907 addl $foo, %reg. */
37e55690 2908 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 2909 if (val == 0xa1)
2910 {
2911 /* movl foo, %eax. */
55fd94b0
AM		 2912 bfd_put_8 (output_bfd, 0xb8,
2913 contents + rel->r_offset - 1);
37e55690 2914 }
299bf759 2915 else
37e55690 2916 {
142411ca
L		 2917 unsigned int type;
2918
55fd94b0
AM		 2919 type = bfd_get_8 (input_bfd,
2920 contents + rel->r_offset - 2);
299bf759 2921 switch (type)
26e41594 2922 {
299bf759
L		 2923 case 0x8b:
2924 /* movl */
299bf759
L		 2925 bfd_put_8 (output_bfd, 0xc7,
2926 contents + rel->r_offset - 2);
2927 bfd_put_8 (output_bfd,
2928 0xc0 | ((val >> 3) & 7),
2929 contents + rel->r_offset - 1);
2930 break;
2931 case 0x03:
2932 /* addl */
299bf759
L		 2933 bfd_put_8 (output_bfd, 0x81,
2934 contents + rel->r_offset - 2);
2935 bfd_put_8 (output_bfd,
2936 0xc0 | ((val >> 3) & 7),
2937 contents + rel->r_offset - 1);
2938 break;
2939 default:
2940 BFD_FAIL ();
2941 break;
26e41594 2942 }
37e55690 2943 }
eb4ff4d6 2944 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 2945 contents + rel->r_offset);
2946 continue;
2947 }
2948 else
2949 {
2950 unsigned int val, type;
2951
2952 /* {IE_32,GOTIE}->LE transition:
2953 Originally it can be one of:
13ae64f3 2954 subl foo(%reg1), %reg2
13ae64f3 2955 movl foo(%reg1), %reg2
37e55690 2956 addl foo(%reg1), %reg2
13ae64f3
JJ		 2957 We change it into:
2958 subl $foo, %reg2
37e55690
JJ		 2959 movl $foo, %reg2 (6 byte form)
2960 addl $foo, %reg2. */
13ae64f3
JJ		 2961 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2962 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 2963 if (type == 0x8b)
2964 {
2965 /* movl */
13ae64f3
JJ		 2966 bfd_put_8 (output_bfd, 0xc7,
2967 contents + rel->r_offset - 2);
2968 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2969 contents + rel->r_offset - 1);
2970 }
2971 else if (type == 0x2b)
2972 {
2973 /* subl */
13ae64f3
JJ		 2974 bfd_put_8 (output_bfd, 0x81,
2975 contents + rel->r_offset - 2);
2976 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2977 contents + rel->r_offset - 1);
2978 }
37e55690
JJ		 2979 else if (type == 0x03)
2980 {
2981 /* addl */
2982 bfd_put_8 (output_bfd, 0x81,
2983 contents + rel->r_offset - 2);
2984 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2985 contents + rel->r_offset - 1);
2986 }
13ae64f3
JJ		 2987 else
2988 BFD_FAIL ();
419414ea 2989 if (r_type == R_386_TLS_GOTIE)
eb4ff4d6 2990 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 2991 contents + rel->r_offset);
2992 else
eb4ff4d6 2993 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 2994 contents + rel->r_offset);
13ae64f3
JJ		 2995 continue;
2996 }
2997 }
2998
6de2ae4a 2999 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 3000 abort ();
3001
3002 if (h != NULL)
67a4f2b7
AO		 3003 {
3004 off = h->got.offset;
0afcef53 3005 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
67a4f2b7 3006 }
13ae64f3
JJ		 3007 else
3008 {
3009 if (local_got_offsets == NULL)
3010 abort ();
3011
3012 off = local_got_offsets[r_symndx];
67a4f2b7 3013 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 3014 }
3015
3016 if ((off & 1) != 0)
3017 off &= ~1;
26e41594 3018 else
13ae64f3 3019 {
947216bf 3020 Elf_Internal_Rela outrel;
91d6fa6a 3021 int dr_type;
67a4f2b7 3022 asection *sreloc;
13ae64f3 3023
6de2ae4a 3024 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3025 abort ();
3026
67a4f2b7
AO		 3027 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3028
3029 if (GOT_TLS_GDESC_P (tls_type))
3030 {
59d6ffb2 3031 bfd_byte *loc;
67a4f2b7
AO		 3032 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3033 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 3034 <= htab->elf.sgotplt->size);
3035 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3036 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 3037 + offplt
3038 + htab->sgotplt_jump_table_size);
6de2ae4a 3039 sreloc = htab->elf.srelplt;
67a4f2b7 3040 loc = sreloc->contents;
765e526c 3041 loc += (htab->next_tls_desc_index++
5ae0bfb6 3042 * sizeof (Elf32_External_Rel));
67a4f2b7 3043 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 3044 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 3045 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3046 if (indx == 0)
3047 {
3048 BFD_ASSERT (! unresolved_reloc);
3049 bfd_put_32 (output_bfd,
0afcef53 3050 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3051 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3052 + htab->sgotplt_jump_table_size + 4);
3053 }
3054 else
3055 {
3056 bfd_put_32 (output_bfd, 0,
6de2ae4a 3057 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3058 + htab->sgotplt_jump_table_size + 4);
3059 }
3060 }
3061
6de2ae4a 3062 sreloc = htab->elf.srelgot;
67a4f2b7 3063
6de2ae4a
L		 3064 outrel.r_offset = (htab->elf.sgot->output_section->vma
3065 + htab->elf.sgot->output_offset + off);
13ae64f3 3066
67a4f2b7 3067 if (GOT_TLS_GD_P (tls_type))
13ae64f3 3068 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 3069 else if (GOT_TLS_GDESC_P (tls_type))
3070 goto dr_done;
37e55690
JJ		 3071 else if (tls_type == GOT_TLS_IE_POS)
3072 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 3073 else
3074 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 3075
37e55690 3076 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6 3077 bfd_put_32 (output_bfd,
0afcef53 3078 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3079 htab->elf.sgot->contents + off);
37e55690 3080 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 3081 bfd_put_32 (output_bfd,
0afcef53 3082 _bfd_x86_elf_dtpoff_base (info) - relocation,
6de2ae4a 3083 htab->elf.sgot->contents + off);
67a4f2b7 3084 else if (dr_type != R_386_TLS_DESC)
c366c25e 3085 bfd_put_32 (output_bfd, 0,
6de2ae4a 3086 htab->elf.sgot->contents + off);
13ae64f3 3087 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 3088
59d6ffb2 3089 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 3090
67a4f2b7 3091 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 3092 {
3093 if (indx == 0)
3094 {
07d6d2b8 3095 BFD_ASSERT (! unresolved_reloc);
13ae64f3 3096 bfd_put_32 (output_bfd,
0afcef53 3097 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3098 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3099 }
3100 else
3101 {
3102 bfd_put_32 (output_bfd, 0,
6de2ae4a 3103 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3104 outrel.r_info = ELF32_R_INFO (indx,
3105 R_386_TLS_DTPOFF32);
3106 outrel.r_offset += 4;
59d6ffb2 3107 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 3108 }
3109 }
37e55690
JJ		 3110 else if (tls_type == GOT_TLS_IE_BOTH)
3111 {
3112 bfd_put_32 (output_bfd,
eb4ff4d6 3113 (indx == 0
0afcef53 3114 ? relocation - _bfd_x86_elf_dtpoff_base (info)
eb4ff4d6 3115 : 0),
6de2ae4a 3116 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 3117 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3118 outrel.r_offset += 4;
59d6ffb2 3119 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 3120 }
13ae64f3 3121
67a4f2b7 3122 dr_done:
13ae64f3
JJ		 3123 if (h != NULL)
3124 h->got.offset |= 1;
3125 else
3126 local_got_offsets[r_symndx] |= 1;
3127 }
3128
67a4f2b7
AO		 3129 if (off >= (bfd_vma) -2
3130 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 3131 abort ();
419414ea
L		 3132 if (r_type_tls == R_386_TLS_GOTDESC
3133 || r_type_tls == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3134 {
3135 relocation = htab->sgotplt_jump_table_size + offplt;
3136 unresolved_reloc = FALSE;
3137 }
419414ea 3138 else if (r_type_tls == r_type)
13ae64f3 3139 {
6de2ae4a
L		 3140 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3141 + htab->elf.sgotplt->output_offset;
3142 relocation = htab->elf.sgot->output_section->vma
3143 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 3144 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3145 && tls_type == GOT_TLS_IE_BOTH)
3146 relocation += 4;
3147 if (r_type == R_386_TLS_IE)
8c37241b 3148 relocation += g_o_t;
b34976b6 3149 unresolved_reloc = FALSE;
13ae64f3 3150 }
419414ea 3151 else if (r_type == R_386_TLS_GD)
13ae64f3
JJ		 3152 {
3153 unsigned int val, type;
3154 bfd_vma roff;
3155
3156 /* GD->IE transition. */
6eaa7fb5
L		 3157 type = *(contents + rel->r_offset - 2);
3158 val = *(contents + rel->r_offset - 1);
13ae64f3
JJ		 3159 if (type == 0x04)
3160 {
6eaa7fb5
L		 3161 /* Change
3162 leal foo@tlsgd(,%ebx,1), %eax
3163 call ___tls_get_addr@PLT
3164 into:
3165 movl %gs:0, %eax
3166 subl $foo@gottpoff(%ebx), %eax. */
13ae64f3 3167 val >>= 3;
142411ca 3168 roff = rel->r_offset - 3;
13ae64f3
JJ		 3169 }
3170 else
3171 {
6eaa7fb5
L		 3172 /* Change
3173 leal foo@tlsgd(%ebx), %eax
3174 call ___tls_get_addr@PLT
3175 nop
3176 or
3177 leal foo@tlsgd(%reg), %eax
3178 call *___tls_get_addr@GOT(%reg)
3179 which may be converted to
3180 addr32 call ___tls_get_addr
3181 into:
3182 movl %gs:0, %eax;
3183 subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 3184 roff = rel->r_offset - 2;
3185 }
3186 memcpy (contents + roff,
3187 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3188 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 3189 /* If foo is used only with foo@gotntpoff(%reg) and
3190 foo@indntpoff, but not with foo@gottpoff(%reg), change
3191 subl $foo@gottpoff(%reg), %eax
3192 into:
3193 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 3194 if (tls_type == GOT_TLS_IE_POS)
3195 contents[roff + 6] = 0x03;
8c37241b 3196 bfd_put_32 (output_bfd,
6de2ae4a
L		 3197 htab->elf.sgot->output_section->vma
3198 + htab->elf.sgot->output_offset + off
3199 - htab->elf.sgotplt->output_section->vma
3200 - htab->elf.sgotplt->output_offset,
13ae64f3 3201 contents + roff + 8);
6eaa7fb5 3202 /* Skip R_386_PLT32 and R_386_GOT32X. */
13ae64f3 3203 rel++;
60f2e42e 3204 wrel++;
13ae64f3
JJ		 3205 continue;
3206 }
419414ea 3207 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 3208 {
3209 /* GDesc -> IE transition.
3210 It's originally something like:
3211 leal x@tlsdesc(%ebx), %eax
3212
3213 Change it to:
142411ca 3214 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 3215 or:
3216 movl x@gottpoff(%ebx), %eax # before negl %eax
3217
3218 Registers other than %eax may be set up here. */
3219
67a4f2b7
AO		 3220 bfd_vma roff;
3221
3222 /* First, make sure it's a leal adding ebx to a 32-bit
3223 offset into any register, although it's probably
3224 almost always going to be eax. */
3225 roff = rel->r_offset;
67a4f2b7
AO		 3226
3227 /* Now modify the instruction as appropriate. */
3228 /* To turn a leal into a movl in the form we use it, it
3229 suffices to change the first byte from 0x8d to 0x8b.
3230 aoliva FIXME: should we decide to keep the leal, all
3231 we have to do is remove the statement below, and
3232 adjust the relaxation of R_386_TLS_DESC_CALL. */
3233 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3234
3235 if (tls_type == GOT_TLS_IE_BOTH)
3236 off += 4;
3237
3238 bfd_put_32 (output_bfd,
6de2ae4a
L		 3239 htab->elf.sgot->output_section->vma
3240 + htab->elf.sgot->output_offset + off
3241 - htab->elf.sgotplt->output_section->vma
3242 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 3243 contents + roff);
3244 continue;
3245 }
419414ea 3246 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3247 {
3248 /* GDesc -> IE transition.
3249 It's originally:
3250 call *(%eax)
3251
3252 Change it to:
142411ca 3253 xchg %ax,%ax
67a4f2b7
AO		 3254 or
3255 negl %eax
3256 depending on how we transformed the TLS_GOTDESC above.
3257 */
3258
67a4f2b7
AO		 3259 bfd_vma roff;
3260
67a4f2b7 3261 roff = rel->r_offset;
67a4f2b7
AO		 3262
3263 /* Now modify the instruction as appropriate. */
3264 if (tls_type != GOT_TLS_IE_NEG)
3265 {
10efb593
L		 3266 /* xchg %ax,%ax */
3267 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3268 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3269 }
3270 else
3271 {
3272 /* negl %eax */
3273 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3274 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3275 }
3276
3277 continue;
3278 }
3279 else
3280 BFD_ASSERT (FALSE);
13ae64f3
JJ		 3281 break;
3282
3283 case R_386_TLS_LDM:
142411ca
L		 3284 if (! elf_i386_tls_transition (info, input_bfd,
3285 input_section, contents,
3286 symtab_hdr, sym_hashes,
3287 &r_type, GOT_UNKNOWN, rel,
bedfd056 3288 relend, h, r_symndx, TRUE))
142411ca 3289 return FALSE;
13ae64f3 3290
142411ca
L		 3291 if (r_type != R_386_TLS_LDM)
3292 {
6eaa7fb5
L		 3293 /* LD->LE transition. Change
3294 leal foo@tlsldm(%ebx) %eax
3295 call ___tls_get_addr@PLT
3296 into:
3297 movl %gs:0, %eax
3298 nop
3299 leal 0(%esi,1), %esi
3300 or change
3301 leal foo@tlsldm(%reg) %eax
3302 call *___tls_get_addr@GOT(%reg)
3303 which may be converted to
3304 addr32 call ___tls_get_addr
3305 into:
3306 movl %gs:0, %eax
3307 leal 0(%esi), %esi */
142411ca 3308 BFD_ASSERT (r_type == R_386_TLS_LE_32);
6eaa7fb5
L		 3309 if (*(contents + rel->r_offset + 4) == 0xff
3310 || *(contents + rel->r_offset + 4) == 0x67)
3311 memcpy (contents + rel->r_offset - 2,
3312 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3313 else
3314 memcpy (contents + rel->r_offset - 2,
3315 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 3316 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 3317 rel++;
60f2e42e 3318 wrel++;
13ae64f3
JJ		 3319 continue;
3320 }
3321
6de2ae4a 3322 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 3323 abort ();
3324
0afcef53 3325 off = htab->tls_ld_or_ldm_got.offset;
13ae64f3
JJ		 3326 if (off & 1)
3327 off &= ~1;
3328 else
3329 {
947216bf 3330 Elf_Internal_Rela outrel;
13ae64f3 3331
6de2ae4a 3332 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3333 abort ();
3334
6de2ae4a
L		 3335 outrel.r_offset = (htab->elf.sgot->output_section->vma
3336 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 3337
3338 bfd_put_32 (output_bfd, 0,
6de2ae4a 3339 htab->elf.sgot->contents + off);
13ae64f3 3340 bfd_put_32 (output_bfd, 0,
6de2ae4a 3341 htab->elf.sgot->contents + off + 4);
13ae64f3 3342 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 3343 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
0afcef53 3344 htab->tls_ld_or_ldm_got.offset |= 1;
13ae64f3 3345 }
6de2ae4a
L		 3346 relocation = htab->elf.sgot->output_section->vma
3347 + htab->elf.sgot->output_offset + off
3348 - htab->elf.sgotplt->output_section->vma
3349 - htab->elf.sgotplt->output_offset;
b34976b6 3350 unresolved_reloc = FALSE;
13ae64f3
JJ		 3351 break;
3352
3353 case R_386_TLS_LDO_32:
0e1862bb
L		 3354 if (!bfd_link_executable (info)
3355 || (input_section->flags & SEC_CODE) == 0)
0afcef53 3356 relocation -= _bfd_x86_elf_dtpoff_base (info);
13ae64f3
JJ		 3357 else
3358 /* When converting LDO to LE, we must negate. */
eb4ff4d6 3359 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3360 break;
3361
3362 case R_386_TLS_LE_32:
13ae64f3 3363 case R_386_TLS_LE:
0e1862bb 3364 if (!bfd_link_executable (info))
37e55690 3365 {
947216bf 3366 Elf_Internal_Rela outrel;
37e55690 3367 asection *sreloc;
37e55690
JJ		 3368
3369 outrel.r_offset = rel->r_offset
3370 + input_section->output_section->vma
3371 + input_section->output_offset;
3372 if (h != NULL && h->dynindx != -1)
3373 indx = h->dynindx;
3374 else
3375 indx = 0;
3376 if (r_type == R_386_TLS_LE_32)
3377 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3378 else
3379 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3380 sreloc = elf_section_data (input_section)->sreloc;
3381 if (sreloc == NULL)
3382 abort ();
59d6ffb2 3383 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 3384 if (indx)
3385 continue;
3386 else if (r_type == R_386_TLS_LE_32)
0afcef53 3387 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
37e55690 3388 else
0afcef53 3389 relocation -= _bfd_x86_elf_dtpoff_base (info);
37e55690
JJ		 3390 }
3391 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 3392 relocation = elf_i386_tpoff (info, relocation);
37e55690 3393 else
eb4ff4d6 3394 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3395 break;
3396
252b5132
RH		 3397 default:
3398 break;
3399 }
3400
239e1f3a
AM		 3401 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3402 because such sections are not SEC_ALLOC and thus ld.so will
3403 not process them. */
8c694914 3404 if (unresolved_reloc
239e1f3a 3405 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 3406 && h->def_dynamic)
3407 && _bfd_elf_section_offset (output_bfd, info, input_section,
3408 rel->r_offset) != (bfd_vma) -1)
6a30718d 3409 {
4eca0228 3410 _bfd_error_handler
695344c0 3411 /* xgettext:c-format */
2dcf00ce 3412 (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3413 input_bfd,
3414 input_section,
2dcf00ce 3415 (uint64_t) rel->r_offset,
843fe662 3416 howto->name,
6a30718d 3417 h->root.root.string);
b34976b6 3418 return FALSE;
6a30718d 3419 }
83be169b 3420
dc1e8a47 3421 do_relocation:
252b5132
RH		 3422 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3423 contents, rel->r_offset,
55fd94b0 3424 relocation, 0);
252b5132 3425
dc1e8a47 3426 check_relocation_error:
cf5c0c5b 3427 if (r != bfd_reloc_ok)
252b5132 3428 {
cf5c0c5b 3429 const char *name;
ffb2e45b 3430
cf5c0c5b
AM		 3431 if (h != NULL)
3432 name = h->root.root.string;
3433 else
3434 {
3435 name = bfd_elf_string_from_elf_section (input_bfd,
3436 symtab_hdr->sh_link,
3437 sym->st_name);
3438 if (name == NULL)
b34976b6 3439 return FALSE;
cf5c0c5b 3440 if (*name == '\0')
fd361982 3441 name = bfd_section_name (sec);
cf5c0c5b 3442 }
ffb2e45b 3443
cf5c0c5b 3444 if (r == bfd_reloc_overflow)
1a72702b
AM		 3445 (*info->callbacks->reloc_overflow)
3446 (info, (h ? &h->root : NULL), name, howto->name,
3447 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
cf5c0c5b
AM		 3448 else
3449 {
4eca0228 3450 _bfd_error_handler
695344c0 3451 /* xgettext:c-format */
2dcf00ce 3452 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
d003868e 3453 input_bfd, input_section,
2dcf00ce 3454 (uint64_t) rel->r_offset, name, (int) r);
b34976b6 3455 return FALSE;
cf5c0c5b 3456 }
252b5132 3457 }
60f2e42e
L		 3458
3459 if (wrel != rel)
3460 *wrel = *rel;
3461 }
3462
3463 if (wrel != rel)
3464 {
3465 Elf_Internal_Shdr *rel_hdr;
3466 size_t deleted = rel - wrel;
3467
3468 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3469 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3470 if (rel_hdr->sh_size == 0)
3471 {
3472 /* It is too late to remove an empty reloc section. Leave
3473 one NONE reloc.
3474 ??? What is wrong with an empty section??? */
3475 rel_hdr->sh_size = rel_hdr->sh_entsize;
3476 deleted -= 1;
3477 }
3478 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3479 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3480 input_section->reloc_count -= deleted;
252b5132
RH		 3481 }
3482
b34976b6 3483 return TRUE;
252b5132
RH		 3484}
3485
3486/* Finish up dynamic symbol handling. We set the contents of various
3487 dynamic sections here. */
3488
b34976b6 3489static bfd_boolean
55fd94b0
AM		 3490elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3491 struct bfd_link_info *info,
3492 struct elf_link_hash_entry *h,
3493 Elf_Internal_Sym *sym)
252b5132 3494{
0afcef53 3495 struct elf_x86_link_hash_table *htab;
25e762b9 3496 unsigned plt_entry_size;
0afcef53 3497 struct elf_x86_link_hash_entry *eh;
aec6b87e 3498 bfd_boolean local_undefweak;
ee2fdd6f 3499 bfd_boolean use_plt_second;
252b5132 3500
0afcef53 3501 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 3502 if (htab == NULL)
3503 return FALSE;
252b5132 3504
765e526c 3505 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 3506
ee2fdd6f
L		 3507 /* Use the second PLT section only if there is .plt section. */
3508 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3509
0afcef53 3510 eh = (struct elf_x86_link_hash_entry *) h;
e133d005
L		 3511 if (eh->no_finish_dynamic_symbol)
3512 abort ();
dd7e64d4 3513
aec6b87e
L		 3514 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3515 resolved undefined weak symbols in executable so that their
3516 references have value 0 at run-time. */
c5bce5c6 3517 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
aec6b87e 3518
252b5132
RH		 3519 if (h->plt.offset != (bfd_vma) -1)
3520 {
ee2fdd6f 3521 bfd_vma plt_index, plt_offset;
252b5132 3522 bfd_vma got_offset;
947216bf
AM		 3523 Elf_Internal_Rela rel;
3524 bfd_byte *loc;
ee2fdd6f 3525 asection *plt, *resolved_plt, *gotplt, *relplt;
cbe950e9
L		 3526
3527 /* When building a static executable, use .iplt, .igot.plt and
3528 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 3529 if (htab->elf.splt != NULL)
cbe950e9 3530 {
6de2ae4a
L		 3531 plt = htab->elf.splt;
3532 gotplt = htab->elf.sgotplt;
3533 relplt = htab->elf.srelplt;
cbe950e9
L		 3534 }
3535 else
3536 {
6de2ae4a
L		 3537 plt = htab->elf.iplt;
3538 gotplt = htab->elf.igotplt;
3539 relplt = htab->elf.irelplt;
cbe950e9 3540 }
252b5132 3541
f3180fa9 3542 VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
252b5132
RH		 3543
3544 /* Get the index in the procedure linkage table which
3545 corresponds to this symbol. This is the index of this symbol
3546 in all the symbols for which we are making plt entries. The
cbe950e9 3547 first entry in the procedure linkage table is reserved.
252b5132 3548
cbe950e9 3549 Get the offset into the .got table of the entry that
252b5132 3550 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 3551 The first three are reserved.
6bbec505 3552
cbe950e9
L		 3553 For static executables, we don't reserve anything. */
3554
6de2ae4a 3555 if (plt == htab->elf.splt)
cbe950e9 3556 {
f604c2a2 3557 got_offset = (h->plt.offset / plt_entry_size
765e526c 3558 - htab->plt.has_plt0);
e1f98742 3559 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 3560 }
3561 else
3562 {
e1f98742
L		 3563 got_offset = h->plt.offset / plt_entry_size;
3564 got_offset = got_offset * 4;
cbe950e9 3565 }
252b5132 3566
f604c2a2
L		 3567 /* Fill in the entry in the procedure linkage table and update
3568 the first slot. */
765e526c 3569 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
f604c2a2 3570 plt_entry_size);
ee2fdd6f
L		 3571
3572 if (use_plt_second)
3573 {
3574 const bfd_byte *plt_entry;
3575 if (bfd_link_pic (info))
765e526c 3576 plt_entry = htab->non_lazy_plt->pic_plt_entry;
ee2fdd6f 3577 else
765e526c 3578 plt_entry = htab->non_lazy_plt->plt_entry;
ee2fdd6f 3579 memcpy (htab->plt_second->contents + eh->plt_second.offset,
765e526c 3580 plt_entry, htab->non_lazy_plt->plt_entry_size);
ee2fdd6f
L		 3581
3582 resolved_plt = htab->plt_second;
3583 plt_offset = eh->plt_second.offset;
3584 }
3585 else
3586 {
3587 resolved_plt = plt;
3588 plt_offset = h->plt.offset;
3589 }
3590
0e1862bb 3591 if (! bfd_link_pic (info))
252b5132 3592 {
252b5132 3593 bfd_put_32 (output_bfd,
cbe950e9
L		 3594 (gotplt->output_section->vma
3595 + gotplt->output_offset
252b5132 3596 + got_offset),
ee2fdd6f 3597 resolved_plt->contents + plt_offset
07d6d2b8 3598 + htab->plt.plt_got_offset);
eac338cf 3599
851b6fa1 3600 if (htab->target_os == is_vxworks)
eac338cf
PB		 3601 {
3602 int s, k, reloc_index;
3603
3604 /* Create the R_386_32 relocation referencing the GOT
3605 for this PLT entry. */
3606
3607 /* S: Current slot number (zero-based). */
765e526c 3608 s = ((h->plt.offset - htab->plt.plt_entry_size)
07d6d2b8 3609 / htab->plt.plt_entry_size);
eac338cf 3610 /* K: Number of relocations for PLTResolve. */
0e1862bb 3611 if (bfd_link_pic (info))
eac338cf
PB		 3612 k = PLTRESOLVE_RELOCS_SHLIB;
3613 else
3614 k = PLTRESOLVE_RELOCS;
3615 /* Skip the PLTresolve relocations, and the relocations for
3616 the other PLT slots. */
3617 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
765e526c 3618 loc = (htab->srelplt2->contents + reloc_index
eac338cf
PB		 3619 * sizeof (Elf32_External_Rel));
3620
ee2fdd6f
L		 3621 rel.r_offset = (plt->output_section->vma
3622 + plt->output_offset
eac338cf 3623 + h->plt.offset + 2),
7325306f 3624 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3625 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3626
3627 /* Create the R_386_32 relocation referencing the beginning of
3628 the PLT for this GOT entry. */
6de2ae4a
L		 3629 rel.r_offset = (htab->elf.sgotplt->output_section->vma
3630 + htab->elf.sgotplt->output_offset
eac338cf 3631 + got_offset);
7325306f 3632 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 3633 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 3634 loc + sizeof (Elf32_External_Rel));
eac338cf 3635 }
252b5132
RH		 3636 }
3637 else
3638 {
252b5132 3639 bfd_put_32 (output_bfd, got_offset,
ee2fdd6f 3640 resolved_plt->contents + plt_offset
07d6d2b8 3641 + htab->plt.plt_got_offset);
252b5132
RH		 3642 }
3643
aec6b87e
L		 3644 /* Fill in the entry in the global offset table. Leave the entry
3645 as zero for undefined weak symbol in PIE. No PLT relocation
3646 against undefined weak symbol in PIE. */
3647 if (!local_undefweak)
cbe950e9 3648 {
765e526c 3649 if (htab->plt.has_plt0)
f604c2a2
L		 3650 bfd_put_32 (output_bfd,
3651 (plt->output_section->vma
3652 + plt->output_offset
3653 + h->plt.offset
765e526c 3654 + htab->lazy_plt->plt_lazy_offset),
f604c2a2 3655 gotplt->contents + got_offset);
252b5132 3656
aec6b87e
L		 3657 /* Fill in the entry in the .rel.plt section. */
3658 rel.r_offset = (gotplt->output_section->vma
3659 + gotplt->output_offset
3660 + got_offset);
cf1070f1 3661 if (PLT_LOCAL_IFUNC_P (info, h))
aec6b87e 3662 {
871b3ab2 3663 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 3664 h->root.root.string,
3665 h->root.u.def.section->owner);
3666
aec6b87e
L		 3667 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3668 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3669 in the .got.plt section. */
3670 bfd_put_32 (output_bfd,
3671 (h->root.u.def.value
3672 + h->root.u.def.section->output_section->vma
3673 + h->root.u.def.section->output_offset),
3674 gotplt->contents + got_offset);
3675 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3676 /* R_386_IRELATIVE comes last. */
3677 plt_index = htab->next_irelative_index--;
3678 }
3679 else
3680 {
3681 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3682 plt_index = htab->next_jump_slot_index++;
3683 }
3684
3685 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3686 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3687
f604c2a2
L		 3688 /* Don't fill the second and third slots in PLT entry for
3689 static executables nor without PLT0. */
765e526c 3690 if (plt == htab->elf.splt && htab->plt.has_plt0)
aec6b87e
L		 3691 {
3692 bfd_put_32 (output_bfd,
3693 plt_index * sizeof (Elf32_External_Rel),
3694 plt->contents + h->plt.offset
765e526c 3695 + htab->lazy_plt->plt_reloc_offset);
f604c2a2
L		 3696 bfd_put_32 (output_bfd,
3697 - (h->plt.offset
765e526c 3698 + htab->lazy_plt->plt_plt_offset + 4),
f604c2a2 3699 (plt->contents + h->plt.offset
765e526c 3700 + htab->lazy_plt->plt_plt_offset));
aec6b87e 3701 }
e1f98742 3702 }
dd7e64d4
L		 3703 }
3704 else if (eh->plt_got.offset != (bfd_vma) -1)
3705 {
3706 bfd_vma got_offset, plt_offset;
3707 asection *plt, *got, *gotplt;
3708 const bfd_byte *got_plt_entry;
3709
dd7e64d4
L		 3710 /* Set the entry in the GOT procedure linkage table. */
3711 plt = htab->plt_got;
3712 got = htab->elf.sgot;
3713 gotplt = htab->elf.sgotplt;
3714 got_offset = h->got.offset;
3715
3716 if (got_offset == (bfd_vma) -1
3717 || plt == NULL
3718 || got == NULL
3719 || gotplt == NULL)
3720 abort ();
3721
3722 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 3723 if (! bfd_link_pic (info))
252b5132 3724 {
765e526c 3725 got_plt_entry = htab->non_lazy_plt->plt_entry;
dd7e64d4 3726 got_offset += got->output_section->vma + got->output_offset;
252b5132 3727 }
dd7e64d4
L		 3728 else
3729 {
765e526c 3730 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
dd7e64d4
L		 3731 got_offset += (got->output_section->vma
3732 + got->output_offset
3733 - gotplt->output_section->vma
3734 - gotplt->output_offset);
3735 }
3736
3737 plt_offset = eh->plt_got.offset;
3738 memcpy (plt->contents + plt_offset, got_plt_entry,
765e526c 3739 htab->non_lazy_plt->plt_entry_size);
dd7e64d4 3740 bfd_put_32 (output_bfd, got_offset,
f604c2a2 3741 (plt->contents + plt_offset
765e526c 3742 + htab->non_lazy_plt->plt_got_offset));
dd7e64d4
L		 3743 }
3744
aec6b87e
L		 3745 if (!local_undefweak
3746 && !h->def_regular
dd7e64d4
L		 3747 && (h->plt.offset != (bfd_vma) -1
3748 || eh->plt_got.offset != (bfd_vma) -1))
3749 {
3750 /* Mark the symbol as undefined, rather than as defined in
3751 the .plt section. Leave the value if there were any
3752 relocations where pointer equality matters (this is a clue
3753 for the dynamic linker, to make function pointer
3754 comparisons work between an application and shared
3755 library), otherwise set it to zero. If a function is only
3756 called from a binary, there is no need to slow down
3757 shared libraries because of that. */
3758 sym->st_shndx = SHN_UNDEF;
3759 if (!h->pointer_equality_needed)
3760 sym->st_value = 0;
252b5132
RH		 3761 }
3762
4ec09950
L		 3763 _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym);
3764
aec6b87e
L		 3765 /* Don't generate dynamic GOT relocation against undefined weak
3766 symbol in executable. */
13ae64f3 3767 if (h->got.offset != (bfd_vma) -1
0afcef53
L		 3768 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3769 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
aec6b87e 3770 && !local_undefweak)
252b5132 3771 {
947216bf 3772 Elf_Internal_Rela rel;
233cc9c1 3773 asection *relgot = htab->elf.srelgot;
252b5132
RH		 3774
3775 /* This symbol has an entry in the global offset table. Set it
3776 up. */
3777
6de2ae4a 3778 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 3779 abort ();
252b5132 3780
6de2ae4a
L		 3781 rel.r_offset = (htab->elf.sgot->output_section->vma
3782 + htab->elf.sgot->output_offset
dc810e39 3783 + (h->got.offset & ~(bfd_vma) 1));
252b5132 3784
dd5724d5
AM		 3785 /* If this is a static link, or it is a -Bsymbolic link and the
3786 symbol is defined locally or was forced to be local because
3787 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 3788 The entry in the global offset table will already have been
3789 initialized in the relocate_section function. */
710ab287 3790 if (h->def_regular
0018b0a3
L		 3791 && h->type == STT_GNU_IFUNC)
3792 {
233cc9c1
L		 3793 if (h->plt.offset == (bfd_vma) -1)
3794 {
3795 /* STT_GNU_IFUNC is referenced without PLT. */
3796 if (htab->elf.splt == NULL)
3797 {
3798 /* use .rel[a].iplt section to store .got relocations
3799 in static executable. */
3800 relgot = htab->elf.irelplt;
3801 }
6999821f 3802 if (SYMBOL_REFERENCES_LOCAL_P (info, h))
233cc9c1 3803 {
871b3ab2 3804 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 3805 h->root.root.string,
3806 h->root.u.def.section->owner);
3807
233cc9c1
L		 3808 bfd_put_32 (output_bfd,
3809 (h->root.u.def.value
3810 + h->root.u.def.section->output_section->vma
3811 + h->root.u.def.section->output_offset),
3812 htab->elf.sgot->contents + h->got.offset);
3813 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3814 }
3815 else
3816 goto do_glob_dat;
3817 }
3818 else if (bfd_link_pic (info))
710ab287
L		 3819 {
3820 /* Generate R_386_GLOB_DAT. */
3821 goto do_glob_dat;
3822 }
3823 else
3824 {
cd2b2c10 3825 asection *plt;
ee2fdd6f 3826 bfd_vma plt_offset;
cd2b2c10 3827
710ab287
L		 3828 if (!h->pointer_equality_needed)
3829 abort ();
3830
3831 /* For non-shared object, we can't use .got.plt, which
3832 contains the real function addres if we need pointer
3833 equality. We load the GOT entry with the PLT entry. */
ee2fdd6f
L		 3834 if (htab->plt_second != NULL)
3835 {
3836 plt = htab->plt_second;
3837 plt_offset = eh->plt_second.offset;
3838 }
3839 else
3840 {
3841 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3842 plt_offset = h->plt.offset;
3843 }
710ab287
L		 3844 bfd_put_32 (output_bfd,
3845 (plt->output_section->vma
ee2fdd6f 3846 + plt->output_offset + plt_offset),
6de2ae4a 3847 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 3848 return TRUE;
3849 }
0018b0a3 3850 }
0e1862bb 3851 else if (bfd_link_pic (info)
6999821f 3852 && SYMBOL_REFERENCES_LOCAL_P (info, h))
dd5724d5 3853 {
6725bdbf 3854 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 3855 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3856 }
252b5132
RH		 3857 else
3858 {
dd5724d5 3859 BFD_ASSERT((h->got.offset & 1) == 0);
dc1e8a47 3860 do_glob_dat:
6725bdbf 3861 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 3862 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 3863 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3864 }
3865
233cc9c1 3866 elf_append_rel (output_bfd, relgot, &rel);
252b5132
RH		 3867 }
3868
f5385ebf 3869 if (h->needs_copy)
252b5132 3870 {
947216bf 3871 Elf_Internal_Rela rel;
5474d94f 3872 asection *s;
252b5132
RH		 3873
3874 /* This symbol needs a copy reloc. Set it up. */
ff38b4cc 3875 VERIFY_COPY_RELOC (h, htab)
252b5132
RH		 3876
3877 rel.r_offset = (h->root.u.def.value
3878 + h->root.u.def.section->output_section->vma
3879 + h->root.u.def.section->output_offset);
3880 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
afbf7e8e 3881 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 3882 s = htab->elf.sreldynrelro;
3883 else
3884 s = htab->elf.srelbss;
3885 elf_append_rel (output_bfd, s, &rel);
252b5132
RH		 3886 }
3887
b34976b6 3888 return TRUE;
252b5132
RH		 3889}
3890
c25bc9fc
L		 3891/* Finish up local dynamic symbol handling. We set the contents of
3892 various dynamic sections here. */
3893
3894static bfd_boolean
3895elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
3896{
3897 struct elf_link_hash_entry *h
3898 = (struct elf_link_hash_entry *) *slot;
3899 struct bfd_link_info *info
23209a78 3900 = (struct bfd_link_info *) inf;
c25bc9fc
L		 3901
3902 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
3903 h, NULL);
3904}
3905
aec6b87e
L		 3906/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
3907 here since undefined weak symbol may not be dynamic and may not be
3908 called for elf_i386_finish_dynamic_symbol. */
3909
3910static bfd_boolean
3911elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
3912 void *inf)
3913{
3914 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
3915 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3916
3917 if (h->root.type != bfd_link_hash_undefweak
3918 || h->dynindx != -1)
3919 return TRUE;
3920
3921 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5f0f0847 3922 info, h, NULL);
aec6b87e
L		 3923}
3924
38701953
AM		 3925/* Used to decide how to sort relocs in an optimal manner for the
3926 dynamic linker, before writing them out. */
3927
3928static enum elf_reloc_type_class
cae1fbbb 3929elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 3930 const asection *rel_sec ATTRIBUTE_UNUSED,
3931 const Elf_Internal_Rela *rela)
38701953 3932{
cae1fbbb
L		 3933 bfd *abfd = info->output_bfd;
3934 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3935 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 3936
d9e3b590
L		 3937 if (htab->dynsym != NULL
3938 && htab->dynsym->contents != NULL)
3939 {
3940 /* Check relocation against STT_GNU_IFUNC symbol if there are
07d6d2b8 3941 dynamic symbols. */
d9e3b590 3942 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
c428ce9d
L		 3943 if (r_symndx != STN_UNDEF)
3944 {
3945 Elf_Internal_Sym sym;
3946 if (!bed->s->swap_symbol_in (abfd,
3947 (htab->dynsym->contents
3948 + r_symndx * sizeof (Elf32_External_Sym)),
3949 0, &sym))
3950 abort ();
d9e3b590 3951
c428ce9d
L		 3952 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3953 return reloc_class_ifunc;
3954 }
d9e3b590 3955 }
cae1fbbb 3956
55fd94b0 3957 switch (ELF32_R_TYPE (rela->r_info))
38701953 3958 {
c428ce9d
L		 3959 case R_386_IRELATIVE:
3960 return reloc_class_ifunc;
38701953
AM		 3961 case R_386_RELATIVE:
3962 return reloc_class_relative;
3963 case R_386_JUMP_SLOT:
3964 return reloc_class_plt;
3965 case R_386_COPY:
3966 return reloc_class_copy;
3967 default:
3968 return reloc_class_normal;
3969 }
3970}
3971
252b5132
RH		 3972/* Finish up the dynamic sections. */
3973
b34976b6 3974static bfd_boolean
55fd94b0
AM		 3975elf_i386_finish_dynamic_sections (bfd *output_bfd,
3976 struct bfd_link_info *info)
252b5132 3977{
0afcef53 3978 struct elf_x86_link_hash_table *htab;
252b5132 3979
9577f60b 3980 htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
4dfe6ac6
NC		 3981 if (htab == NULL)
3982 return FALSE;
3983
9577f60b
L		 3984 if (!htab->elf.dynamic_sections_created)
3985 return TRUE;
252b5132 3986
9577f60b 3987 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 3988 {
9577f60b
L		 3989 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3990 really seem like the right value. */
3991 elf_section_data (htab->elf.splt->output_section)
3992 ->this_hdr.sh_entsize = 4;
252b5132 3993
9577f60b 3994 if (htab->plt.has_plt0)
252b5132 3995 {
9577f60b
L		 3996 /* Fill in the special first entry in the procedure linkage
3997 table. */
9577f60b
L		 3998 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
3999 htab->lazy_plt->plt0_entry_size);
4000 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
851b6fa1 4001 htab->plt0_pad_byte,
9577f60b
L		 4002 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
4003 if (!bfd_link_pic (info))
252b5132 4004 {
9577f60b
L		 4005 bfd_put_32 (output_bfd,
4006 (htab->elf.sgotplt->output_section->vma
4007 + htab->elf.sgotplt->output_offset
4008 + 4),
4009 htab->elf.splt->contents
4010 + htab->lazy_plt->plt0_got1_offset);
4011 bfd_put_32 (output_bfd,
4012 (htab->elf.sgotplt->output_section->vma
4013 + htab->elf.sgotplt->output_offset
4014 + 8),
4015 htab->elf.splt->contents
4016 + htab->lazy_plt->plt0_got2_offset);
1f78f649 4017
851b6fa1 4018 if (htab->target_os == is_vxworks)
eac338cf 4019 {
9577f60b
L		 4020 Elf_Internal_Rela rel;
4021 int num_plts = (htab->elf.splt->size
4022 / htab->plt.plt_entry_size) - 1;
4023 unsigned char *p;
4024 asection *srelplt2 = htab->srelplt2;
4025
4026 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4027 + 4. On IA32 we use REL relocations so the
4028 addend goes in the PLT directly. */
4029 rel.r_offset = (htab->elf.splt->output_section->vma
4030 + htab->elf.splt->output_offset
4031 + htab->lazy_plt->plt0_got1_offset);
4032 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4033 R_386_32);
4034 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4035 srelplt2->contents);
4036 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4037 + 8. */
4038 rel.r_offset = (htab->elf.splt->output_section->vma
4039 + htab->elf.splt->output_offset
4040 + htab->lazy_plt->plt0_got2_offset);
4041 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4042 R_386_32);
4043 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4044 srelplt2->contents +
4045 sizeof (Elf32_External_Rel));
4046 /* Correct the .rel.plt.unloaded relocations. */
4047 p = srelplt2->contents;
4048 if (bfd_link_pic (info))
4049 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4050 else
4051 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
eac338cf 4052
9577f60b 4053 for (; num_plts; num_plts--)
1f78f649 4054 {
9577f60b 4055 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
f604c2a2 4056 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
1f78f649 4057 R_386_32);
9577f60b
L		 4058 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4059 p += sizeof (Elf32_External_Rel);
f604c2a2 4060
9577f60b
L		 4061 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4062 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4063 R_386_32);
4064 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4065 p += sizeof (Elf32_External_Rel);
1f78f649 4066 }
eac338cf
PB		 4067 }
4068 }
252b5132 4069 }
fff53dae
L		 4070 }
4071
aec6b87e
L		 4072 /* Fill PLT entries for undefined weak symbols in PIE. */
4073 if (bfd_link_pie (info))
4074 bfd_hash_traverse (&info->hash->table,
4075 elf_i386_pie_finish_undefweak_symbol,
4076 info);
4077
b34976b6 4078 return TRUE;
252b5132
RH		 4079}
4080
233cc9c1
L		 4081/* Fill PLT/GOT entries and allocate dynamic relocations for local
4082 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4083 It has to be done before elf_link_sort_relocs is called so that
4084 dynamic relocations are properly sorted. */
4085
4086static bfd_boolean
4087elf_i386_output_arch_local_syms
4088 (bfd *output_bfd ATTRIBUTE_UNUSED,
4089 struct bfd_link_info *info,
4090 void *flaginfo ATTRIBUTE_UNUSED,
4091 int (*func) (void *, const char *,
4092 Elf_Internal_Sym *,
4093 asection *,
4094 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4095{
0afcef53
L		 4096 struct elf_x86_link_hash_table *htab
4097 = elf_x86_hash_table (info, I386_ELF_DATA);
233cc9c1
L		 4098 if (htab == NULL)
4099 return FALSE;
4100
4101 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4102 htab_traverse (htab->loc_hash_table,
4103 elf_i386_finish_local_dynamic_symbol,
4104 info);
4105
4106 return TRUE;
4107}
4108
f604c2a2 4109/* Forward declaration. */
765e526c 4110static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
f604c2a2
L		 4111
4112/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4113 dynamic relocations. */
4114
4115static long
4116elf_i386_get_synthetic_symtab (bfd *abfd,
4117 long symcount ATTRIBUTE_UNUSED,
4118 asymbol **syms ATTRIBUTE_UNUSED,
4119 long dynsymcount,
4120 asymbol **dynsyms,
4121 asymbol **ret)
4122{
f493882d 4123 long count, i, n;
f604c2a2 4124 int j;
f604c2a2 4125 bfd_byte *plt_contents;
f493882d 4126 long relsize;
765e526c
L		 4127 const struct elf_x86_lazy_plt_layout *lazy_plt;
4128 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4129 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4130 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
f604c2a2
L		 4131 asection *plt;
4132 bfd_vma got_addr;
f493882d
L		 4133 enum elf_x86_plt_type plt_type;
4134 struct elf_x86_plt plts[] =
3972882e 4135 {
f493882d
L		 4136 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4137 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4138 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4139 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
f604c2a2 4140 };
144bed8d 4141
f604c2a2 4142 *ret = NULL;
144bed8d 4143
f604c2a2
L		 4144 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4145 return 0;
3972882e 4146
f604c2a2
L		 4147 if (dynsymcount <= 0)
4148 return 0;
cca5b8b6 4149
f604c2a2
L		 4150 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4151 if (relsize <= 0)
4152 return -1;
cca5b8b6 4153
f604c2a2
L		 4154 non_lazy_plt = NULL;
4155 /* Silence GCC 6. */
4156 lazy_plt = NULL;
ee2fdd6f
L		 4157 non_lazy_ibt_plt = NULL;
4158 lazy_ibt_plt = NULL;
851b6fa1 4159 switch (get_elf_x86_backend_data (abfd)->target_os)
144bed8d 4160 {
f604c2a2 4161 case is_normal:
3b4c3844 4162 case is_solaris:
f604c2a2 4163 non_lazy_plt = &elf_i386_non_lazy_plt;
ee2fdd6f
L		 4164 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4165 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 4166 /* Fall through */
4167 case is_vxworks:
4168 lazy_plt = &elf_i386_lazy_plt;
4169 break;
4170 case is_nacl:
4171 lazy_plt = &elf_i386_nacl_plt;
4172 break;
4173 }
4174
4175 got_addr = 0;
3972882e 4176
f604c2a2
L		 4177 count = 0;
4178 for (j = 0; plts[j].name != NULL; j++)
4179 {
4180 plt = bfd_get_section_by_name (abfd, plts[j].name);
90efb642 4181 if (plt == NULL || plt->size == 0)
6f25f223 4182 continue;
533d0af0 4183
f604c2a2
L		 4184 /* Get the PLT section contents. */
4185 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4186 if (plt_contents == NULL)
4187 break;
4188 if (!bfd_get_section_contents (abfd, (asection *) plt,
4189 plt_contents, 0, plt->size))
4190 {
4191 free (plt_contents);
4192 break;
4193 }
4194
4195 /* Check what kind of PLT it is. */
4196 plt_type = plt_unknown;
90efb642
L		 4197 if (plts[j].type == plt_unknown
4198 && (plt->size >= (lazy_plt->plt0_entry_size
4199 + lazy_plt->plt_entry_size)))
f604c2a2
L		 4200 {
4201 /* Match lazy PLT first. */
4202 if (memcmp (plt_contents, lazy_plt->plt0_entry,
4203 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4204 {
4205 /* The fist entry in the lazy IBT PLT is the same as the
4206 normal lazy PLT. */
4207 if (lazy_ibt_plt != NULL
90efb642 4208 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4209 lazy_ibt_plt->plt_entry,
4210 lazy_ibt_plt->plt_got_offset) == 0))
4211 plt_type = plt_lazy | plt_second;
4212 else
4213 plt_type = plt_lazy;
4214 }
f604c2a2
L		 4215 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4216 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4217 {
4218 /* The fist entry in the PIC lazy IBT PLT is the same as
4219 the normal PIC lazy PLT. */
4220 if (lazy_ibt_plt != NULL
90efb642 4221 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4222 lazy_ibt_plt->pic_plt_entry,
4223 lazy_ibt_plt->plt_got_offset) == 0))
4224 plt_type = plt_lazy | plt_pic | plt_second;
4225 else
4226 plt_type = plt_lazy | plt_pic;
4227 }
f604c2a2
L		 4228 }
4229
4230 if (non_lazy_plt != NULL
90efb642
L		 4231 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4232 && plt->size >= non_lazy_plt->plt_entry_size)
f604c2a2
L		 4233 {
4234 /* Match non-lazy PLT. */
4235 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4236 non_lazy_plt->plt_got_offset) == 0)
4237 plt_type = plt_non_lazy;
4238 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4239 non_lazy_plt->plt_got_offset) == 0)
4240 plt_type = plt_pic;
4241 }
4242
ee2fdd6f 4243 if ((non_lazy_ibt_plt != NULL)
90efb642
L		 4244 && (plt_type == plt_unknown || plt_type == plt_second)
4245 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
ee2fdd6f
L		 4246 {
4247 if (memcmp (plt_contents,
4248 non_lazy_ibt_plt->plt_entry,
4249 non_lazy_ibt_plt->plt_got_offset) == 0)
4250 {
4251 /* Match IBT PLT. */
4252 plt_type = plt_second;
4253 non_lazy_plt = non_lazy_ibt_plt;
4254 }
4255 else if (memcmp (plt_contents,
4256 non_lazy_ibt_plt->pic_plt_entry,
4257 non_lazy_ibt_plt->plt_got_offset) == 0)
4258 {
4259 /* Match PIC IBT PLT. */
4260 plt_type = plt_second | plt_pic;
4261 non_lazy_plt = non_lazy_ibt_plt;
4262 }
4263 }
4264
f604c2a2 4265 if (plt_type == plt_unknown)
37c0b6ee
L		 4266 {
4267 free (plt_contents);
4268 continue;
4269 }
3972882e 4270
f604c2a2
L		 4271 plts[j].sec = plt;
4272 plts[j].type = plt_type;
ec1f73bb 4273
f604c2a2
L		 4274 if ((plt_type & plt_lazy))
4275 {
4276 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4277 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4278 /* Skip PLT0 in lazy PLT. */
4279 i = 1;
4280 }
4281 else
4282 {
4283 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4284 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4285 i = 0;
4286 }
fca6ae69 4287
ee2fdd6f
L		 4288 /* Skip lazy PLT when the second PLT is used. */
4289 if ((plt_type & (plt_lazy | plt_second))
4290 == (plt_lazy | plt_second))
4291 plts[j].count = 0;
4292 else
4293 {
4294 n = plt->size / plts[j].plt_entry_size;
4295 plts[j].count = n;
4296 count += n - i;
4297 }
f604c2a2
L		 4298
4299 plts[j].contents = plt_contents;
4300
4301 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4302 if ((plt_type & plt_pic))
4303 got_addr = (bfd_vma) -1;
144bed8d
L		 4304 }
4305
f493882d
L		 4306 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4307 got_addr, plts, dynsyms,
4308 ret);
4c45e5c9
JJ		 4309}
4310
f604c2a2
L		 4311/* Set up i386 GNU properties. Return the first relocatable ELF input
4312 with GNU properties if found. Otherwise, return NULL. */
4313
4314static bfd *
4315elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4316{
1de031c8 4317 struct elf_x86_init_table init_table;
f604c2a2 4318
851b6fa1 4319 switch (get_elf_x86_backend_data (info->output_bfd)->target_os)
f604c2a2
L		 4320 {
4321 case is_normal:
3b4c3844 4322 case is_solaris:
851b6fa1 4323 init_table.plt0_pad_byte = 0x0;
1de031c8
L		 4324 init_table.lazy_plt = &elf_i386_lazy_plt;
4325 init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4326 init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4327 init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 4328 break;
4329 case is_vxworks:
851b6fa1 4330 init_table.plt0_pad_byte = 0x90;
1de031c8
L		 4331 init_table.lazy_plt = &elf_i386_lazy_plt;
4332 init_table.non_lazy_plt = NULL;
4333 init_table.lazy_ibt_plt = NULL;
4334 init_table.non_lazy_ibt_plt = NULL;
f604c2a2
L		 4335 break;
4336 case is_nacl:
851b6fa1 4337 init_table.plt0_pad_byte = 0x90;
1de031c8
L		 4338 init_table.lazy_plt = &elf_i386_nacl_plt;
4339 init_table.non_lazy_plt = NULL;
4340 init_table.lazy_ibt_plt = NULL;
4341 init_table.non_lazy_ibt_plt = NULL;
f604c2a2
L		 4342 break;
4343 }
4344
1de031c8
L		 4345 init_table.r_info = elf32_r_info;
4346 init_table.r_sym = elf32_r_sym;
7a382c1c 4347
1de031c8 4348 return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
f604c2a2
L		 4349}
4350
6d00b590 4351#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 4352#define TARGET_LITTLE_NAME "elf32-i386"
4353#define ELF_ARCH bfd_arch_i386
ae95ffa6 4354#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 4355#define ELF_MACHINE_CODE EM_386
4356#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 4357
4358#define elf_backend_can_gc_sections 1
51b64d56 4359#define elf_backend_can_refcount 1
252b5132
RH		 4360#define elf_backend_want_got_plt 1
4361#define elf_backend_plt_readonly 1
4362#define elf_backend_want_plt_sym 0
4363#define elf_backend_got_header_size 12
e41b3a13 4364#define elf_backend_plt_alignment 4
64f52338 4365#define elf_backend_dtrel_excludes_plt 1
f7483970 4366#define elf_backend_extern_protected_data 1
bedfd056 4367#define elf_backend_caches_rawsize 1
5474d94f 4368#define elf_backend_want_dynrelro 1
252b5132 4369
8c29f035
AM		 4370/* Support RELA for objdump of prelink objects. */
4371#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 4372#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4373
dd5724d5 4374#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
dd5724d5 4375#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 4376#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 4377#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5 4378
13285a1b 4379#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 4380#define elf_backend_check_relocs elf_i386_check_relocs
f604c2a2 4381#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
0ac8d2ca 4382#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 4383#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4384#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
233cc9c1 4385#define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
c5fccbec
DJ		 4386#define elf_backend_grok_prstatus elf_i386_grok_prstatus
4387#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 4388#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca 4389#define elf_backend_relocate_section elf_i386_relocate_section
f604c2a2 4390#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
9f857535 4391#define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
dd5724d5 4392
a2f63b2e
MR		 4393#define elf_backend_linux_prpsinfo32_ugid16 TRUE
4394
8f56f7a2
L		 4395#define elf32_bed elf32_i386_bed
4396
252b5132 4397#include "elf32-target.h"
2bc3c89a
AM		 4398
4399/* FreeBSD support. */
4400
4401#undef TARGET_LITTLE_SYM
6d00b590 4402#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 4403#undef TARGET_LITTLE_NAME
4404#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 4405#undef ELF_OSABI
4406#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 4407
4408/* The kernel recognizes executables as valid only if they carry a
4409 "FreeBSD" label in the ELF header. So we put this label on all
4410 executables and (for simplicity) also all other object files. */
4411
ed7e9d0b
AM		 4412static bfd_boolean
4413elf_i386_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 4414{
ed7e9d0b
AM		 4415 if (!_bfd_elf_init_file_header (abfd, info))
4416 return FALSE;
2bc3c89a 4417
2bc3c89a 4418#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 4419 {
4420 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4421 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4422 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4423 }
caf47ea6 4424#endif
ed7e9d0b 4425 return TRUE;
2bc3c89a
AM		 4426}
4427
ed7e9d0b
AM		 4428#undef elf_backend_init_file_header
4429#define elf_backend_init_file_header elf_i386_fbsd_init_file_header
571fe01f
NC		 4430#undef elf32_bed
4431#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 4432
d8045f23
NC		 4433#undef elf_backend_add_symbol_hook
4434
2bc3c89a 4435#include "elf32-target.h"
eac338cf 4436
ed7e9d0b
AM		 4437#undef elf_backend_init_file_header
4438
a6cc6b3b
RO		 4439/* Solaris 2. */
4440
4441#undef TARGET_LITTLE_SYM
6d00b590 4442#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO		 4443#undef TARGET_LITTLE_NAME
4444#define TARGET_LITTLE_NAME "elf32-i386-sol2"
4445
3b4c3844
L		 4446static const struct elf_x86_backend_data elf_i386_solaris_arch_bed =
4447 {
4448 is_solaris /* os */
4449 };
4450
4451#undef elf_backend_arch_data
4452#define elf_backend_arch_data &elf_i386_solaris_arch_bed
4453
a6cc6b3b
RO		 4454/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4455 objects won't be recognized. */
4456#undef ELF_OSABI
4457
4458#undef elf32_bed
4459#define elf32_bed elf32_i386_sol2_bed
4460
7dc98aea
RO		 4461/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4462 boundary. */
84865015 4463#undef elf_backend_static_tls_alignment
7dc98aea
RO		 4464#define elf_backend_static_tls_alignment 8
4465
a6cc6b3b
RO		 4466/* The Solaris 2 ABI requires a plt symbol on all platforms.
4467
4468 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4469 File, p.63. */
84865015 4470#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 4471#define elf_backend_want_plt_sym 1
4472
84865015
NC		 4473#undef elf_backend_strtab_flags
4474#define elf_backend_strtab_flags SHF_STRINGS
4475
5522f910 4476/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
07d6d2b8 4477 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5522f910
NC		 4478 FALSE otherwise. ISECTION is the best guess matching section from the
4479 input bfd IBFD, but it might be NULL. */
4480
84865015 4481static bfd_boolean
5522f910
NC		 4482elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4483 bfd *obfd ATTRIBUTE_UNUSED,
4484 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4485 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 4486{
4487 /* PR 19938: FIXME: Need to add code for setting the sh_info
5522f910
NC		 4488 and sh_link fields of Solaris specific section types. */
4489 return FALSE;
84865015 4490
5522f910 4491 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
84865015
NC		 4492 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4493
4494http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4495
4496 The following values should be set:
07d6d2b8
AM		 4497
4498Type Link Info
84865015
NC		 4499-----------------------------------------------------------------------------
4500SHT_SUNW_ancillary The section header index of 0
07d6d2b8
AM		 4501 [0x6fffffee] the associated string table.
4502
84865015 4503SHT_SUNW_capinfo The section header index of For a dynamic object, the
07d6d2b8
AM		 4504 [0x6ffffff0] the associated symbol table. section header index of
4505 the associated
84865015
NC		 4506 SHT_SUNW_capchain table,
4507 otherwise 0.
4508
4509SHT_SUNW_symsort The section header index of 0
07d6d2b8 4510 [0x6ffffff1] the associated symbol table.
84865015
NC		 4511
4512SHT_SUNW_tlssort The section header index of 0
07d6d2b8
AM		 4513 [0x6ffffff2] the associated symbol table.
4514
4515SHT_SUNW_LDYNSYM The section header index of One greater than the
4516 [0x6ffffff3] the associated string table. symbol table index of the
4517 This index is the same string last local symbol,
84865015 4518 table used by the SHT_DYNSYM STB_LOCAL. Since
07d6d2b8
AM		 4519 section. SHT_SUNW_LDYNSYM only
4520 contains local symbols,
84865015
NC		 4521 sh_info is equivalent to
4522 the number of symbols in
4523 the table.
4524
07d6d2b8
AM		 4525SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4526 [0x6ffffff5] the section header index of to named strings, the
4527 the associated section header index of
4528 SHT_SUNW_capinfo table, the associated string
4529 otherwise 0. table, otherwise 0.
84865015 4530
07d6d2b8
AM		 4531SHT_SUNW_move The section header index of 0
4532 [0x6ffffffa] the associated symbol table.
4533
4534SHT_SUNW_COMDAT 0 0
84865015
NC		 4535 [0x6ffffffb]
4536
4537SHT_SUNW_syminfo The section header index of The section header index
07d6d2b8
AM		 4538 [0x6ffffffc] the associated symbol table. of the associated
4539 .dynamic section.
84865015 4540
07d6d2b8
AM		 4541SHT_SUNW_verdef The section header index of The number of version
4542 [0x6ffffffd] the associated string table. definitions within the
4543 section.
84865015
NC		 4544
4545SHT_SUNW_verneed The section header index of The number of version
07d6d2b8
AM		 4546 [0x6ffffffe] the associated string table. dependencies within the
4547 section.
84865015 4548
07d6d2b8
AM		 4549SHT_SUNW_versym The section header index of 0
4550 [0x6fffffff] the associated symbol table. */
84865015
NC		 4551}
4552
5522f910
NC		 4553#undef elf_backend_copy_special_section_fields
4554#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
84865015 4555
a6cc6b3b
RO		 4556#include "elf32-target.h"
4557
bf64a951
L		 4558/* Intel MCU support. */
4559
4560static bfd_boolean
4561elf32_iamcu_elf_object_p (bfd *abfd)
4562{
4563 /* Set the right machine number for an IAMCU elf32 file. */
4564 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4565 return TRUE;
4566}
4567
4568#undef TARGET_LITTLE_SYM
4569#define TARGET_LITTLE_SYM iamcu_elf32_vec
4570#undef TARGET_LITTLE_NAME
4571#define TARGET_LITTLE_NAME "elf32-iamcu"
84865015 4572#undef ELF_ARCH
bf64a951
L		 4573#define ELF_ARCH bfd_arch_iamcu
4574
4575#undef ELF_MACHINE_CODE
4576#define ELF_MACHINE_CODE EM_IAMCU
4577
3b4c3844
L		 4578#undef elf_backend_arch_data
4579#define elf_backend_arch_data &elf_i386_arch_bed
4580
bf64a951
L		 4581#undef ELF_OSABI
4582
4583#undef elf32_bed
4584#define elf32_bed elf32_iamcu_bed
4585
4586#undef elf_backend_object_p
4587#define elf_backend_object_p elf32_iamcu_elf_object_p
4588
4589#undef elf_backend_static_tls_alignment
4590
4591#undef elf_backend_want_plt_sym
07d6d2b8 4592#define elf_backend_want_plt_sym 0
bf64a951 4593
84865015 4594#undef elf_backend_strtab_flags
5522f910 4595#undef elf_backend_copy_special_section_fields
84865015 4596
bf64a951
L		 4597#include "elf32-target.h"
4598
4599/* Restore defaults. */
4600#undef ELF_ARCH
4601#define ELF_ARCH bfd_arch_i386
4602#undef ELF_MACHINE_CODE
4603#define ELF_MACHINE_CODE EM_386
4604
a27e4371
RM		 4605/* Native Client support. */
4606
4607#undef TARGET_LITTLE_SYM
6d00b590 4608#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 4609#undef TARGET_LITTLE_NAME
4610#define TARGET_LITTLE_NAME "elf32-i386-nacl"
4611#undef elf32_bed
4612#define elf32_bed elf32_i386_nacl_bed
4613
4614#undef ELF_MAXPAGESIZE
4615#define ELF_MAXPAGESIZE 0x10000
4616
4617/* Restore defaults. */
4618#undef ELF_OSABI
4619#undef elf_backend_want_plt_sym
4620#define elf_backend_want_plt_sym 0
a27e4371
RM		 4621#undef elf_backend_static_tls_alignment
4622
4623/* NaCl uses substantially different PLT entries for the same effects. */
4624
4625#undef elf_backend_plt_alignment
4626#define elf_backend_plt_alignment 5
4627#define NACL_PLT_ENTRY_SIZE 64
4628#define NACLMASK 0xe0 /* 32-byte alignment mask. */
4629
4630static const bfd_byte elf_i386_nacl_plt0_entry[] =
4631 {
4632 0xff, 0x35, /* pushl contents of address */
07d6d2b8
AM		 4633 0, 0, 0, 0, /* replaced with address of .got + 4. */
4634 0x8b, 0x0d, /* movl contents of address, %ecx */
4635 0, 0, 0, 0, /* replaced with address of .got + 8. */
a27e4371
RM		 4636 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4637 0xff, 0xe1 /* jmp *%ecx */
4638 };
4639
4640static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
4641 {
4642 0x8b, 0x0d, /* movl contents of address, %ecx */
4643 0, 0, 0, 0, /* replaced with GOT slot address. */
4644 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4645 0xff, 0xe1, /* jmp *%ecx */
4646
07d6d2b8 4647 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4648 0x90,
4649 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4650 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4651
4652 /* Lazy GOT entries point here (32-byte aligned). */
4653 0x68, /* pushl immediate */
4654 0, 0, 0, 0, /* replaced with reloc offset. */
4655 0xe9, /* jmp relative */
07d6d2b8 4656 0, 0, 0, 0, /* replaced with offset to .plt. */
a27e4371 4657
07d6d2b8 4658 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4659 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4660 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4661 0x90, 0x90
4662 };
4663
4664static const bfd_byte
4665elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
4666 {
4667 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
4668 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
4669 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
4670 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 4671
4672 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
4673 so pad to that size with nop instructions. */
4674 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 4675 };
4676
4677static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
4678 {
07d6d2b8
AM		 4679 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
4680 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
4681 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
4682 0xff, 0xe1, /* jmp *%ecx */
a27e4371 4683
07d6d2b8 4684 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4685 0x90,
4686 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4687 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4688
4689 /* Lazy GOT entries point here (32-byte aligned). */
07d6d2b8
AM		 4690 0x68, /* pushl immediate */
4691 0, 0, 0, 0, /* replaced with offset into relocation table. */
4692 0xe9, /* jmp relative */
4693 0, 0, 0, 0, /* replaced with offset to start of .plt. */
a27e4371 4694
07d6d2b8 4695 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4696 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4697 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4698 0x90, 0x90
4699 };
4700
4701static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
4702 {
07d6d2b8
AM		 4703#if (PLT_CIE_LENGTH != 20 \
4704 || PLT_FDE_LENGTH != 36 \
4705 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
a27e4371 4706 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
851b6fa1 4707# error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
a27e4371
RM		 4708#endif
4709 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
07d6d2b8
AM		 4710 0, 0, 0, 0, /* CIE ID */
4711 1, /* CIE version */
4712 'z', 'R', 0, /* Augmentation string */
4713 1, /* Code alignment factor */
4714 0x7c, /* Data alignment factor: -4 */
4715 8, /* Return address column */
a27e4371
RM		 4716 1, /* Augmentation size */
4717 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
4718 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
4719 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
4720 DW_CFA_nop, DW_CFA_nop,
4721
07d6d2b8 4722 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
a27e4371 4723 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
07d6d2b8
AM		 4724 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
4725 0, 0, 0, 0, /* .plt size goes here */
4726 0, /* Augmentation size */
4727 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
4728 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
4729 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
4730 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
4731 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
4732 13, /* Block length */
4733 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
4734 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
a27e4371
RM		 4735 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
4736 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
4737 DW_CFA_nop, DW_CFA_nop
4738 };
4739
765e526c 4740static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
a27e4371
RM		 4741 {
4742 elf_i386_nacl_plt0_entry, /* plt0_entry */
4743 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
a27e4371
RM		 4744 elf_i386_nacl_plt_entry, /* plt_entry */
4745 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
92e68c1d
L		 4746 NULL, /* plt_tlsdesc_entry */
4747 0, /* plt_tlsdesc_entry_size*/
4748 0, /* plt_tlsdesc_got1_offset */
4749 0, /* plt_tlsdesc_got2_offset */
4750 0, /* plt_tlsdesc_got1_insn_end */
4751 0, /* plt_tlsdesc_got2_insn_end */
765e526c
L		 4752 2, /* plt0_got1_offset */
4753 8, /* plt0_got2_offset */
4754 0, /* plt0_got2_insn_end */
a27e4371
RM		 4755 2, /* plt_got_offset */
4756 33, /* plt_reloc_offset */
4757 38, /* plt_plt_offset */
765e526c
L		 4758 0, /* plt_got_insn_size */
4759 0, /* plt_plt_insn_end */
a27e4371
RM		 4760 32, /* plt_lazy_offset */
4761 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
4762 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
4763 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
f604c2a2 4764 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
a27e4371
RM		 4765 };
4766
851b6fa1 4767static const struct elf_x86_backend_data elf_i386_nacl_arch_bed =
a27e4371 4768 {
07d6d2b8 4769 is_nacl /* os */
a27e4371
RM		 4770 };
4771
64b384e1
RM		 4772static bfd_boolean
4773elf32_i386_nacl_elf_object_p (bfd *abfd)
4774{
4775 /* Set the right machine number for a NaCl i386 ELF32 file. */
4776 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
4777 return TRUE;
4778}
4779
a27e4371
RM		 4780#undef elf_backend_arch_data
4781#define elf_backend_arch_data &elf_i386_nacl_arch_bed
4782
64b384e1
RM		 4783#undef elf_backend_object_p
4784#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 4785#undef elf_backend_modify_segment_map
4786#define elf_backend_modify_segment_map nacl_modify_segment_map
6d6c25c8
AM		 4787#undef elf_backend_modify_headers
4788#define elf_backend_modify_headers nacl_modify_headers
887badb3
RM		 4789#undef elf_backend_final_write_processing
4790#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 4791
a27e4371
RM		 4792#include "elf32-target.h"
4793
5a68afcf 4794/* Restore defaults. */
64b384e1 4795#undef elf_backend_object_p
5a68afcf 4796#undef elf_backend_modify_segment_map
6d6c25c8 4797#undef elf_backend_modify_headers
887badb3 4798#undef elf_backend_final_write_processing
5a68afcf 4799
eac338cf
PB		 4800/* VxWorks support. */
4801
4802#undef TARGET_LITTLE_SYM
6d00b590 4803#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 4804#undef TARGET_LITTLE_NAME
4805#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 4806#undef ELF_OSABI
1587442d
L		 4807#undef ELF_MAXPAGESIZE
4808#define ELF_MAXPAGESIZE 0x1000
a27e4371
RM		 4809#undef elf_backend_plt_alignment
4810#define elf_backend_plt_alignment 4
eac338cf 4811
851b6fa1 4812static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed =
23209a78 4813 {
07d6d2b8 4814 is_vxworks /* os */
23209a78 4815 };
eac338cf 4816
23209a78
RM		 4817#undef elf_backend_arch_data
4818#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 4819
13285a1b 4820#undef elf_backend_relocs_compatible
eac338cf
PB		 4821#undef elf_backend_add_symbol_hook
4822#define elf_backend_add_symbol_hook \
4823 elf_vxworks_add_symbol_hook
4824#undef elf_backend_link_output_symbol_hook
4825#define elf_backend_link_output_symbol_hook \
9c72ff84 4826 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 4827#undef elf_backend_emit_relocs
4828#define elf_backend_emit_relocs elf_vxworks_emit_relocs
4829#undef elf_backend_final_write_processing
4830#define elf_backend_final_write_processing \
4831 elf_vxworks_final_write_processing
7dc98aea 4832#undef elf_backend_static_tls_alignment
eac338cf
PB		 4833
4834/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4835 define it. */
4836#undef elf_backend_want_plt_sym
4837#define elf_backend_want_plt_sym 1
4838
4839#undef elf32_bed
4840#define elf32_bed elf32_i386_vxworks_bed
4841
4842#include "elf32-target.h"
GDB Binutils - Deliverables
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