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i386: Remove the unused bfd pointer argument
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
CommitLineData
252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
219d1afa 2 Copyright (C) 1993-2018 Free Software Foundation, Inc.
252b5132 3
571fe01f 4 This file is part of BFD, the Binary File Descriptor library.
252b5132 5
571fe01f
NC		 6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
cd123cb7 8 the Free Software Foundation; either version 3 of the License, or
571fe01f 9 (at your option) any later version.
252b5132 10
571fe01f
NC		 11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
252b5132 15
571fe01f
NC		 16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
cd123cb7
NC		 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
252b5132 20
0afcef53 21#include "elfxx-x86.h"
5a68afcf 22#include "elf-nacl.h"
eac338cf 23#include "elf-vxworks.h"
e41b3a13 24#include "dwarf2.h"
02a86693 25#include "opcode/i386.h"
252b5132 26
55fd94b0
AM		 27/* 386 uses REL relocations instead of RELA. */
28#define USE_REL 1
252b5132
RH		 29
30#include "elf/i386.h"
31
32static reloc_howto_type elf_howto_table[]=
33{
6346d5ca 34 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
1b452ec6 35 bfd_elf_generic_reloc, "R_386_NONE",
b34976b6
AM		 36 TRUE, 0x00000000, 0x00000000, FALSE),
37 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 38 bfd_elf_generic_reloc, "R_386_32",
b34976b6
AM		 39 TRUE, 0xffffffff, 0xffffffff, FALSE),
40 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 41 bfd_elf_generic_reloc, "R_386_PC32",
b34976b6
AM		 42 TRUE, 0xffffffff, 0xffffffff, TRUE),
43 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 44 bfd_elf_generic_reloc, "R_386_GOT32",
b34976b6
AM		 45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 47 bfd_elf_generic_reloc, "R_386_PLT32",
b34976b6
AM		 48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 50 bfd_elf_generic_reloc, "R_386_COPY",
b34976b6
AM		 51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 53 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
b34976b6
AM		 54 TRUE, 0xffffffff, 0xffffffff, FALSE),
55 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 56 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
b34976b6
AM		 57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 59 bfd_elf_generic_reloc, "R_386_RELATIVE",
b34976b6
AM		 60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 62 bfd_elf_generic_reloc, "R_386_GOTOFF",
b34976b6
AM		 63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 65 bfd_elf_generic_reloc, "R_386_GOTPC",
b34976b6 66 TRUE, 0xffffffff, 0xffffffff, TRUE),
1b452ec6 67
dc47f327
AM		 68 /* We have a gap in the reloc numbers here.
69 R_386_standard counts the number up to this point, and
70 R_386_ext_offset is the value to subtract from a reloc type of
71 R_386_16 thru R_386_PC8 to form an index into this table. */
55fd94b0
AM		 72#define R_386_standard (R_386_GOTPC + 1)
73#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
1b452ec6 74
37e55690 75 /* These relocs are a GNU extension. */
b34976b6 76 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 77 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
b34976b6
AM		 78 TRUE, 0xffffffff, 0xffffffff, FALSE),
79 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 80 bfd_elf_generic_reloc, "R_386_TLS_IE",
b34976b6
AM		 81 TRUE, 0xffffffff, 0xffffffff, FALSE),
82 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 83 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
b34976b6
AM		 84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 86 bfd_elf_generic_reloc, "R_386_TLS_LE",
b34976b6
AM		 87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 89 bfd_elf_generic_reloc, "R_386_TLS_GD",
b34976b6
AM		 90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 92 bfd_elf_generic_reloc, "R_386_TLS_LDM",
b34976b6
AM		 93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
1b452ec6 95 bfd_elf_generic_reloc, "R_386_16",
b34976b6 96 TRUE, 0xffff, 0xffff, FALSE),
b0360d8c 97 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
1b452ec6 98 bfd_elf_generic_reloc, "R_386_PC16",
b34976b6
AM		 99 TRUE, 0xffff, 0xffff, TRUE),
100 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
1b452ec6 101 bfd_elf_generic_reloc, "R_386_8",
b34976b6
AM		 102 TRUE, 0xff, 0xff, FALSE),
103 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
1b452ec6 104 bfd_elf_generic_reloc, "R_386_PC8",
b34976b6 105 TRUE, 0xff, 0xff, TRUE),
dc47f327 106
55fd94b0
AM		 107#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
108#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
13ae64f3 109 /* These are common with Solaris TLS implementation. */
b34976b6 110 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 111 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
b34976b6
AM		 112 TRUE, 0xffffffff, 0xffffffff, FALSE),
113 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 114 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
b34976b6
AM		 115 TRUE, 0xffffffff, 0xffffffff, FALSE),
116 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 117 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
b34976b6
AM		 118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 120 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
b34976b6
AM		 121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 123 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
b34976b6
AM		 124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 126 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
b34976b6 127 TRUE, 0xffffffff, 0xffffffff, FALSE),
1788fc08
L		 128 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
129 bfd_elf_generic_reloc, "R_386_SIZE32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
67a4f2b7
AO		 131 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
136 FALSE, 0, 0, FALSE),
137 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_DESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
cbe950e9
L		 140 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_386_IRELATIVE",
142 TRUE, 0xffffffff, 0xffffffff, FALSE),
02a86693
L		 143 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_GOT32X",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
13ae64f3
JJ		 146
147 /* Another gap. */
02a86693 148#define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
c74be520 149#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
252b5132
RH		 150
151/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH		 152 HOWTO (R_386_GNU_VTINHERIT, /* type */
153 0, /* rightshift */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
155 0, /* bitsize */
b34976b6 156 FALSE, /* pc_relative */
252b5132
RH		 157 0, /* bitpos */
158 complain_overflow_dont, /* complain_on_overflow */
159 NULL, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
b34976b6 161 FALSE, /* partial_inplace */
252b5132
RH		 162 0, /* src_mask */
163 0, /* dst_mask */
b34976b6 164 FALSE), /* pcrel_offset */
252b5132
RH		 165
166/* GNU extension to record C++ vtable member usage. */
252b5132
RH		 167 HOWTO (R_386_GNU_VTENTRY, /* type */
168 0, /* rightshift */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
170 0, /* bitsize */
b34976b6 171 FALSE, /* pc_relative */
252b5132
RH		 172 0, /* bitpos */
173 complain_overflow_dont, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
b34976b6 176 FALSE, /* partial_inplace */
252b5132
RH		 177 0, /* src_mask */
178 0, /* dst_mask */
b34976b6 179 FALSE) /* pcrel_offset */
dc47f327 180
55fd94b0 181#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
dc47f327
AM		 182
183};
184
daf1c414
L		 185#define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32)
186
aebcc8ff
L		 187#define X86_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32)
188
252b5132 189#ifdef DEBUG_GEN_RELOC
55fd94b0
AM		 190#define TRACE(str) \
191 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH		 192#else
193#define TRACE(str)
194#endif
195
196static reloc_howto_type *
f3185997 197elf_i386_reloc_type_lookup (bfd *abfd,
55fd94b0 198 bfd_reloc_code_real_type code)
252b5132
RH		 199{
200 switch (code)
201 {
202 case BFD_RELOC_NONE:
203 TRACE ("BFD_RELOC_NONE");
55fd94b0 204 return &elf_howto_table[R_386_NONE];
252b5132
RH		 205
206 case BFD_RELOC_32:
207 TRACE ("BFD_RELOC_32");
55fd94b0 208 return &elf_howto_table[R_386_32];
252b5132
RH		 209
210 case BFD_RELOC_CTOR:
211 TRACE ("BFD_RELOC_CTOR");
55fd94b0 212 return &elf_howto_table[R_386_32];
252b5132
RH		 213
214 case BFD_RELOC_32_PCREL:
215 TRACE ("BFD_RELOC_PC32");
55fd94b0 216 return &elf_howto_table[R_386_PC32];
252b5132
RH		 217
218 case BFD_RELOC_386_GOT32:
219 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 220 return &elf_howto_table[R_386_GOT32];
252b5132
RH		 221
222 case BFD_RELOC_386_PLT32:
223 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 224 return &elf_howto_table[R_386_PLT32];
252b5132
RH		 225
226 case BFD_RELOC_386_COPY:
227 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 228 return &elf_howto_table[R_386_COPY];
252b5132
RH		 229
230 case BFD_RELOC_386_GLOB_DAT:
231 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 232 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH		 233
234 case BFD_RELOC_386_JUMP_SLOT:
235 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 236 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH		 237
238 case BFD_RELOC_386_RELATIVE:
239 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 240 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH		 241
242 case BFD_RELOC_386_GOTOFF:
243 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 244 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH		 245
246 case BFD_RELOC_386_GOTPC:
247 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 248 return &elf_howto_table[R_386_GOTPC];
252b5132 249
37e55690
JJ		 250 /* These relocs are a GNU extension. */
251 case BFD_RELOC_386_TLS_TPOFF:
252 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 253 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ		 254
255 case BFD_RELOC_386_TLS_IE:
256 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 257 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ		 258
259 case BFD_RELOC_386_TLS_GOTIE:
260 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 261 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 262
13ae64f3
JJ		 263 case BFD_RELOC_386_TLS_LE:
264 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 265 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ		 266
267 case BFD_RELOC_386_TLS_GD:
268 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 269 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ		 270
271 case BFD_RELOC_386_TLS_LDM:
272 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 273 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 274
252b5132
RH		 275 case BFD_RELOC_16:
276 TRACE ("BFD_RELOC_16");
55fd94b0 277 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH		 278
279 case BFD_RELOC_16_PCREL:
280 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 281 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH		 282
283 case BFD_RELOC_8:
284 TRACE ("BFD_RELOC_8");
55fd94b0 285 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH		 286
287 case BFD_RELOC_8_PCREL:
288 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 289 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 290
13ae64f3
JJ		 291 /* Common with Sun TLS implementation. */
292 case BFD_RELOC_386_TLS_LDO_32:
293 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 294 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ		 295
296 case BFD_RELOC_386_TLS_IE_32:
297 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 298 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ		 299
300 case BFD_RELOC_386_TLS_LE_32:
301 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 302 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ		 303
304 case BFD_RELOC_386_TLS_DTPMOD32:
305 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 306 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ		 307
308 case BFD_RELOC_386_TLS_DTPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 310 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ		 311
312 case BFD_RELOC_386_TLS_TPOFF32:
313 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 314 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 315
1788fc08
L		 316 case BFD_RELOC_SIZE32:
317 TRACE ("BFD_RELOC_SIZE32");
318 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
319
67a4f2b7
AO		 320 case BFD_RELOC_386_TLS_GOTDESC:
321 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
322 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
323
324 case BFD_RELOC_386_TLS_DESC_CALL:
325 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
326 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
327
328 case BFD_RELOC_386_TLS_DESC:
329 TRACE ("BFD_RELOC_386_TLS_DESC");
330 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
331
cbe950e9
L		 332 case BFD_RELOC_386_IRELATIVE:
333 TRACE ("BFD_RELOC_386_IRELATIVE");
2a750708 334 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
cbe950e9 335
02a86693
L		 336 case BFD_RELOC_386_GOT32X:
337 TRACE ("BFD_RELOC_386_GOT32X");
338 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
339
252b5132
RH		 340 case BFD_RELOC_VTABLE_INHERIT:
341 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 342 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH		 343
344 case BFD_RELOC_VTABLE_ENTRY:
345 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 346 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH		 347
348 default:
f3185997
NC		 349 TRACE ("Unknown");
350 /* xgettext:c-format */
e8f5af78 351 _bfd_error_handler (_("%pB: unsupported relocation type: %#x"),
f3185997
NC		 352 abfd, (int) code);
353 bfd_set_error (bfd_error_bad_value);
354 return NULL;
252b5132 355 }
252b5132
RH		 356}
357
157090f7
AM		 358static reloc_howto_type *
359elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
360 const char *r_name)
361{
362 unsigned int i;
363
364 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
365 if (elf_howto_table[i].name != NULL
366 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
367 return &elf_howto_table[i];
368
369 return NULL;
370}
371
142411ca 372static reloc_howto_type *
b366503e 373elf_i386_rtype_to_howto (unsigned r_type)
252b5132 374{
dc47f327
AM		 375 unsigned int indx;
376
377 if ((indx = r_type) >= R_386_standard
378 && ((indx = r_type - R_386_ext_offset) - R_386_standard
379 >= R_386_ext - R_386_standard)
13ae64f3 380 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520
L		 381 >= R_386_ext2 - R_386_ext)
382 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
383 >= R_386_vt - R_386_ext2))
f3185997 384 return NULL;
06614111
NC		 385 /* PR 17512: file: 0f67f69d. */
386 if (elf_howto_table [indx].type != r_type)
387 return NULL;
142411ca
L		 388 return &elf_howto_table[indx];
389}
390
f3185997
NC		 391static bfd_boolean
392elf_i386_info_to_howto_rel (bfd *abfd,
142411ca
L		 393 arelent *cache_ptr,
394 Elf_Internal_Rela *dst)
395{
396 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
f3185997 397
b366503e 398 if ((cache_ptr->howto = elf_i386_rtype_to_howto (r_type)) == NULL)
f3185997
NC		 399 {
400 /* xgettext:c-format */
401 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
402 abfd, r_type);
403 bfd_set_error (bfd_error_bad_value);
404 return FALSE;
405 }
406
407 return TRUE;
252b5132
RH		 408}
409
410/* Return whether a symbol name implies a local label. The UnixWare
411 2.1 cc generates temporary symbols that start with .X, so we
412 recognize them here. FIXME: do other SVR4 compilers also use .X?.
413 If so, we should move the .X recognition into
414 _bfd_elf_is_local_label_name. */
415
b34976b6 416static bfd_boolean
55fd94b0 417elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH		 418{
419 if (name[0] == '.' && name[1] == 'X')
b34976b6 420 return TRUE;
252b5132
RH		 421
422 return _bfd_elf_is_local_label_name (abfd, name);
423}
424\f
38701953 425/* Support for core dump NOTE sections. */
61adc1a4 426
b34976b6 427static bfd_boolean
55fd94b0 428elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM		 429{
430 int offset;
eea6121a 431 size_t size;
38701953 432
61adc1a4 433 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 434 {
61adc1a4
NC		 435 int pr_version = bfd_get_32 (abfd, note->descdata);
436
437 if (pr_version != 1)
07d6d2b8 438 return FALSE;
61adc1a4
NC		 439
440 /* pr_cursig */
228e534f 441 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
61adc1a4
NC		 442
443 /* pr_pid */
228e534f 444 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
61adc1a4
NC		 445
446 /* pr_reg */
447 offset = 28;
eea6121a 448 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC		 449 }
450 else
451 {
452 switch (note->descsz)
453 {
454 default:
455 return FALSE;
38701953 456
61adc1a4
NC		 457 case 144: /* Linux/i386 */
458 /* pr_cursig */
228e534f 459 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 460
61adc1a4 461 /* pr_pid */
228e534f 462 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
38701953 463
61adc1a4
NC		 464 /* pr_reg */
465 offset = 72;
eea6121a 466 size = 68;
38701953 467
61adc1a4
NC		 468 break;
469 }
38701953
AM		 470 }
471
472 /* Make a ".reg/999" section. */
473 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 474 size, note->descpos + offset);
38701953
AM		 475}
476
b34976b6 477static bfd_boolean
55fd94b0 478elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 479{
61adc1a4 480 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 481 {
61adc1a4
NC		 482 int pr_version = bfd_get_32 (abfd, note->descdata);
483
484 if (pr_version != 1)
b34976b6 485 return FALSE;
38701953 486
228e534f 487 elf_tdata (abfd)->core->program
61adc1a4 488 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
228e534f 489 elf_tdata (abfd)->core->command
61adc1a4
NC		 490 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
491 }
492 else
493 {
494 switch (note->descsz)
495 {
496 default:
497 return FALSE;
498
499 case 124: /* Linux/i386 elf_prpsinfo. */
228e534f 500 elf_tdata (abfd)->core->pid
261b8d08 501 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 502 elf_tdata (abfd)->core->program
61adc1a4 503 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 504 elf_tdata (abfd)->core->command
61adc1a4
NC		 505 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
506 }
38701953
AM		 507 }
508
509 /* Note that for some reason, a spurious space is tacked
510 onto the end of the args in some (at least one anyway)
511 implementations, so strip it off if it exists. */
38701953 512 {
228e534f 513 char *command = elf_tdata (abfd)->core->command;
38701953
AM		 514 int n = strlen (command);
515
516 if (0 < n && command[n - 1] == ' ')
517 command[n - 1] = '\0';
518 }
519
b34976b6 520 return TRUE;
38701953
AM		 521}
522\f
523/* Functions for the i386 ELF linker.
524
525 In order to gain some understanding of code in this file without
526 knowing all the intricate details of the linker, note the
527 following:
528
529 Functions named elf_i386_* are called by external routines, other
530 functions are only called locally. elf_i386_* functions appear
531 in this file more or less in the order in which they are called
532 from external routines. eg. elf_i386_check_relocs is called
533 early in the link process, elf_i386_finish_dynamic_sections is
534 one of the last functions. */
535
f604c2a2 536/* The size in bytes of an entry in the lazy procedure linkage table. */
252b5132 537
f604c2a2 538#define LAZY_PLT_ENTRY_SIZE 16
252b5132 539
f604c2a2
L		 540/* The size in bytes of an entry in the non-lazy procedure linkage
541 table. */
252b5132 542
f604c2a2
L		 543#define NON_LAZY_PLT_ENTRY_SIZE 8
544
545/* The first entry in an absolute lazy procedure linkage table looks
546 like this. See the SVR4 ABI i386 supplement to see how this works.
547 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
548
549static const bfd_byte elf_i386_lazy_plt0_entry[12] =
252b5132
RH		 550{
551 0xff, 0x35, /* pushl contents of address */
552 0, 0, 0, 0, /* replaced with address of .got + 4. */
553 0xff, 0x25, /* jmp indirect */
eac338cf 554 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 555};
556
f604c2a2
L		 557/* Subsequent entries in an absolute lazy procedure linkage table look
558 like this. */
252b5132 559
f604c2a2 560static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 561{
562 0xff, 0x25, /* jmp indirect */
563 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
564 0x68, /* pushl immediate */
565 0, 0, 0, 0, /* replaced with offset into relocation table. */
566 0xe9, /* jmp relative */
567 0, 0, 0, 0 /* replaced with offset to start of .plt. */
568};
569
f604c2a2
L		 570/* The first entry in a PIC lazy procedure linkage table look like
571 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
572 lazy_plt->plt0_pad_byte. */
252b5132 573
f604c2a2 574static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
252b5132
RH		 575{
576 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 577 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 578};
579
f604c2a2
L		 580/* Subsequent entries in a PIC lazy procedure linkage table look like
581 this. */
252b5132 582
f604c2a2 583static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
252b5132
RH		 584{
585 0xff, 0xa3, /* jmp *offset(%ebx) */
586 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
587 0x68, /* pushl immediate */
588 0, 0, 0, 0, /* replaced with offset into relocation table. */
589 0xe9, /* jmp relative */
590 0, 0, 0, 0 /* replaced with offset to start of .plt. */
591};
592
f604c2a2 593/* Entries in the non-lazy procedure linkage table look like this. */
dd7e64d4 594
f604c2a2 595static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 596{
597 0xff, 0x25, /* jmp indirect */
598 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
599 0x66, 0x90 /* xchg %ax,%ax */
600};
601
f604c2a2
L		 602/* Entries in the PIC non-lazy procedure linkage table look like
603 this. */
dd7e64d4 604
f604c2a2 605static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
dd7e64d4
L		 606{
607 0xff, 0xa3, /* jmp *offset(%ebx) */
608 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
610};
611
ee2fdd6f
L		 612/* The first entry in an absolute IBT-enabled lazy procedure linkage
613 table looks like this. */
614
615static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
616{
07d6d2b8
AM		 617 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
618 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
619 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
ee2fdd6f
L		 620};
621
622/* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
623 table look like this. Subsequent entries for a PIC IBT-enabled lazy
624 procedure linkage table are the same. */
625
626static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
627{
07d6d2b8
AM		 628 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
629 0x68, 0, 0, 0, 0, /* pushl immediate */
630 0xe9, 0, 0, 0, 0, /* jmp relative */
631 0x66, 0x90 /* xchg %ax,%ax */
ee2fdd6f
L		 632};
633
634/* The first entry in a PIC IBT-enabled lazy procedure linkage table
635 look like. */
636
637static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
638{
639 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
07d6d2b8
AM		 640 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
641 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
ee2fdd6f
L		 642};
643
644/* Entries for branches with IBT-enabled in the absolute non-lazey
645 procedure linkage table look like this. They have the same size
646 as the lazy PLT entry. */
647
648static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
649{
07d6d2b8 650 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
ee2fdd6f
L		 651 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
652 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
653};
654
655/* Entries for branches with IBT-enabled in the PIC non-lazey procedure
656 linkage table look like this. They have the same size as the lazy
657 PLT entry. */
658
659static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
660{
07d6d2b8 661 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
ee2fdd6f
L		 662 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
663 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
664};
665
f604c2a2 666/* .eh_frame covering the lazy .plt section. */
e41b3a13 667
f604c2a2 668static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
e41b3a13 669{
e41b3a13
JJ		 670 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
671 0, 0, 0, 0, /* CIE ID */
672 1, /* CIE version */
673 'z', 'R', 0, /* Augmentation string */
674 1, /* Code alignment factor */
675 0x7c, /* Data alignment factor */
676 8, /* Return address column */
677 1, /* Augmentation size */
678 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
679 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
680 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
681 DW_CFA_nop, DW_CFA_nop,
682
683 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
684 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
685 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
686 0, 0, 0, 0, /* .plt size goes here */
687 0, /* Augmentation size */
688 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
689 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
690 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
691 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
692 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
693 11, /* Block length */
694 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
695 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
696 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
28ede8be 697 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
e41b3a13
JJ		 698 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
699};
700
ee2fdd6f
L		 701/* .eh_frame covering the lazy .plt section with IBT-enabled. */
702
703static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
704{
705 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
706 0, 0, 0, 0, /* CIE ID */
707 1, /* CIE version */
708 'z', 'R', 0, /* Augmentation string */
709 1, /* Code alignment factor */
710 0x7c, /* Data alignment factor */
711 8, /* Return address column */
712 1, /* Augmentation size */
713 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
714 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
715 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
716 DW_CFA_nop, DW_CFA_nop,
717
718 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
719 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
720 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
721 0, 0, 0, 0, /* .plt size goes here */
722 0, /* Augmentation size */
723 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
724 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
725 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
726 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
727 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
728 11, /* Block length */
729 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
730 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
731 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
732 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
733 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
734};
735
f604c2a2 736/* .eh_frame covering the non-lazy .plt section. */
fff53dae 737
f604c2a2 738static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
fff53dae
L		 739{
740#define PLT_GOT_FDE_LENGTH 16
741 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
742 0, 0, 0, 0, /* CIE ID */
743 1, /* CIE version */
744 'z', 'R', 0, /* Augmentation string */
745 1, /* Code alignment factor */
746 0x7c, /* Data alignment factor */
747 8, /* Return address column */
748 1, /* Augmentation size */
749 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
750 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
751 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
752 DW_CFA_nop, DW_CFA_nop,
753
754 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
755 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
f604c2a2
L		 756 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
757 0, 0, 0, 0, /* non-lazy .plt size goes here */
fff53dae
L		 758 0, /* Augmentation size */
759 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
760};
761
25e762b9 762/* These are the standard parameters. */
765e526c 763static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
25e762b9 764 {
07d6d2b8
AM		 765 elf_i386_lazy_plt0_entry, /* plt0_entry */
766 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
767 elf_i386_lazy_plt_entry, /* plt_entry */
768 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
92e68c1d
L		 769 NULL, /* plt_tlsdesc_entry */
770 0, /* plt_tlsdesc_entry_size*/
771 0, /* plt_tlsdesc_got1_offset */
772 0, /* plt_tlsdesc_got2_offset */
773 0, /* plt_tlsdesc_got1_insn_end */
774 0, /* plt_tlsdesc_got2_insn_end */
07d6d2b8
AM		 775 2, /* plt0_got1_offset */
776 8, /* plt0_got2_offset */
777 0, /* plt0_got2_insn_end */
778 2, /* plt_got_offset */
779 7, /* plt_reloc_offset */
780 12, /* plt_plt_offset */
781 0, /* plt_got_insn_size */
782 0, /* plt_plt_insn_end */
783 6, /* plt_lazy_offset */
784 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
785 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
786 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
f604c2a2
L		 787 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
788 };
789
765e526c 790static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
f604c2a2 791 {
07d6d2b8
AM		 792 elf_i386_non_lazy_plt_entry, /* plt_entry */
793 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
794 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
795 2, /* plt_got_offset */
796 0, /* plt_got_insn_size */
797 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
f604c2a2 798 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
25e762b9 799 };
ee2fdd6f 800
765e526c 801static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
ee2fdd6f 802 {
07d6d2b8 803 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
ee2fdd6f 804 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
07d6d2b8
AM		 805 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
806 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
92e68c1d
L		 807 NULL, /* plt_tlsdesc_entry */
808 0, /* plt_tlsdesc_entry_size*/
809 0, /* plt_tlsdesc_got1_offset */
810 0, /* plt_tlsdesc_got2_offset */
811 0, /* plt_tlsdesc_got1_insn_end */
812 0, /* plt_tlsdesc_got2_insn_end */
07d6d2b8
AM		 813 2, /* plt0_got1_offset */
814 8, /* plt0_got2_offset */
815 0, /* plt0_got2_insn_end */
816 4+2, /* plt_got_offset */
817 4+1, /* plt_reloc_offset */
818 4+6, /* plt_plt_offset */
819 0, /* plt_got_insn_size */
820 0, /* plt_plt_insn_end */
821 0, /* plt_lazy_offset */
822 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
823 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
824 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
ee2fdd6f
L		 825 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
826 };
827
765e526c 828static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
ee2fdd6f 829 {
07d6d2b8 830 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
ee2fdd6f 831 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
07d6d2b8
AM		 832 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
833 4+2, /* plt_got_offset */
834 0, /* plt_got_insn_size */
835 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
ee2fdd6f
L		 836 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
837 };
25e762b9
RM		 838\f
839
eac338cf
PB		 840/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
841 for the PLTResolve stub and then for each PLT entry. */
842#define PLTRESOLVE_RELOCS_SHLIB 0
843#define PLTRESOLVE_RELOCS 2
844#define PLT_NON_JUMP_SLOT_RELOCS 2
845
23209a78 846/* These are the standard parameters. */
851b6fa1 847static const struct elf_x86_backend_data elf_i386_arch_bed =
23209a78 848 {
07d6d2b8 849 is_normal /* os */
23209a78
RM		 850 };
851
852#define elf_backend_arch_data &elf_i386_arch_bed
853
142411ca
L		 854/* Return TRUE if the TLS access code sequence support transition
855 from R_TYPE. */
856
857static bfd_boolean
bedfd056 858elf_i386_check_tls_transition (asection *sec,
142411ca
L		 859 bfd_byte *contents,
860 Elf_Internal_Shdr *symtab_hdr,
861 struct elf_link_hash_entry **sym_hashes,
862 unsigned int r_type,
863 const Elf_Internal_Rela *rel,
864 const Elf_Internal_Rela *relend)
13ae64f3 865{
6eaa7fb5 866 unsigned int val, type, reg;
142411ca
L		 867 unsigned long r_symndx;
868 struct elf_link_hash_entry *h;
869 bfd_vma offset;
6eaa7fb5 870 bfd_byte *call;
1d4af308 871 bfd_boolean indirect_call;
142411ca 872
142411ca 873 offset = rel->r_offset;
13ae64f3 874 switch (r_type)
142411ca
L		 875 {
876 case R_386_TLS_GD:
877 case R_386_TLS_LDM:
878 if (offset < 2 || (rel + 1) >= relend)
879 return FALSE;
880
6eaa7fb5
L		 881 indirect_call = FALSE;
882 call = contents + offset + 4;
883 val = *(call - 5);
884 type = *(call - 6);
142411ca
L		 885 if (r_type == R_386_TLS_GD)
886 {
09e8c3bf 887 /* Check transition from GD access model. Only
6eaa7fb5
L		 888 leal foo@tlsgd(,%ebx,1), %eax
889 call ___tls_get_addr@PLT
890 or
891 leal foo@tlsgd(%ebx) %eax
892 call ___tls_get_addr@PLT
893 nop
894 or
895 leal foo@tlsgd(%reg), %eax
896 call *___tls_get_addr@GOT(%reg)
897 which may be converted to
898 addr32 call ___tls_get_addr
142411ca 899 can transit to different access model. */
6eaa7fb5
L		 900 if ((offset + 10) > sec->size
901 || (type != 0x8d && type != 0x04))
142411ca
L		 902 return FALSE;
903
142411ca
L		 904 if (type == 0x04)
905 {
6eaa7fb5
L		 906 /* leal foo@tlsgd(,%ebx,1), %eax
907 call ___tls_get_addr@PLT */
142411ca
L		 908 if (offset < 3)
909 return FALSE;
910
6eaa7fb5
L		 911 if (*(call - 7) != 0x8d
912 || val != 0x1d
913 || call[0] != 0xe8)
142411ca
L		 914 return FALSE;
915 }
916 else
917 {
6eaa7fb5
L		 918 /* This must be
919 leal foo@tlsgd(%ebx), %eax
920 call ___tls_get_addr@PLT
921 nop
922 or
923 leal foo@tlsgd(%reg), %eax
924 call *___tls_get_addr@GOT(%reg)
925 which may be converted to
926 addr32 call ___tls_get_addr
927
928 %eax can't be used as the GOT base register since it
929 is used to pass parameter to ___tls_get_addr. */
930 reg = val & 7;
931 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca
L		 932 return FALSE;
933
6eaa7fb5
L		 934 indirect_call = call[0] == 0xff;
935 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
936 && !(call[0] == 0x67 && call[1] == 0xe8)
937 && !(indirect_call
938 && (call[1] & 0xf8) == 0x90
939 && (call[1] & 0x7) == reg))
142411ca
L		 940 return FALSE;
941 }
942 }
943 else
944 {
945 /* Check transition from LD access model. Only
6eaa7fb5
L		 946 leal foo@tlsldm(%ebx), %eax
947 call ___tls_get_addr@PLT
948 or
949 leal foo@tlsldm(%reg), %eax
950 call *___tls_get_addr@GOT(%reg)
951 which may be converted to
952 addr32 call ___tls_get_addr
142411ca
L		 953 can transit to different access model. */
954 if (type != 0x8d || (offset + 9) > sec->size)
955 return FALSE;
956
6eaa7fb5
L		 957 /* %eax can't be used as the GOT base register since it is
958 used to pass parameter to ___tls_get_addr. */
959 reg = val & 7;
960 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
142411ca 961 return FALSE;
142411ca 962
6eaa7fb5
L		 963 indirect_call = call[0] == 0xff;
964 if (!(reg == 3 && call[0] == 0xe8)
965 && !(call[0] == 0x67 && call[1] == 0xe8)
966 && !(indirect_call
967 && (call[1] & 0xf8) == 0x90
968 && (call[1] & 0x7) == reg))
969 return FALSE;
970 }
142411ca
L		 971
972 r_symndx = ELF32_R_SYM (rel[1].r_info);
973 if (r_symndx < symtab_hdr->sh_info)
974 return FALSE;
975
976 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1d4af308 977 if (h == NULL
0afcef53 978 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
6eaa7fb5
L		 979 return FALSE;
980 else if (indirect_call)
981 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
982 else
983 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
984 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
142411ca
L		 985
986 case R_386_TLS_IE:
987 /* Check transition from IE access model:
988 movl foo@indntpoff(%rip), %eax
989 movl foo@indntpoff(%rip), %reg
990 addl foo@indntpoff(%rip), %reg
991 */
992
993 if (offset < 1 || (offset + 4) > sec->size)
994 return FALSE;
995
996 /* Check "movl foo@tpoff(%rip), %eax" first. */
997 val = bfd_get_8 (abfd, contents + offset - 1);
998 if (val == 0xa1)
999 return TRUE;
1000
1001 if (offset < 2)
1002 return FALSE;
1003
1004 /* Check movl|addl foo@tpoff(%rip), %reg. */
1005 type = bfd_get_8 (abfd, contents + offset - 2);
1006 return ((type == 0x8b || type == 0x03)
1007 && (val & 0xc7) == 0x05);
1008
1009 case R_386_TLS_GOTIE:
1010 case R_386_TLS_IE_32:
1011 /* Check transition from {IE_32,GOTIE} access model:
1012 subl foo@{tpoff,gontoff}(%reg1), %reg2
1013 movl foo@{tpoff,gontoff}(%reg1), %reg2
1014 addl foo@{tpoff,gontoff}(%reg1), %reg2
1015 */
1016
1017 if (offset < 2 || (offset + 4) > sec->size)
1018 return FALSE;
1019
1020 val = bfd_get_8 (abfd, contents + offset - 1);
1021 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1022 return FALSE;
1023
1024 type = bfd_get_8 (abfd, contents + offset - 2);
1025 return type == 0x8b || type == 0x2b || type == 0x03;
1026
1027 case R_386_TLS_GOTDESC:
1028 /* Check transition from GDesc access model:
1029 leal x@tlsdesc(%ebx), %eax
1030
1031 Make sure it's a leal adding ebx to a 32-bit offset
1032 into any register, although it's probably almost always
1033 going to be eax. */
1034
1035 if (offset < 2 || (offset + 4) > sec->size)
1036 return FALSE;
1037
1038 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1039 return FALSE;
1040
1041 val = bfd_get_8 (abfd, contents + offset - 1);
1042 return (val & 0xc7) == 0x83;
1043
1044 case R_386_TLS_DESC_CALL:
1045 /* Check transition from GDesc access model:
6eaa7fb5 1046 call *x@tlsdesc(%eax)
142411ca
L		 1047 */
1048 if (offset + 2 <= sec->size)
1049 {
6eaa7fb5
L		 1050 /* Make sure that it's a call *x@tlsdesc(%eax). */
1051 call = contents + offset;
1052 return call[0] == 0xff && call[1] == 0x10;
142411ca
L		 1053 }
1054
1055 return FALSE;
1056
1057 default:
1058 abort ();
1059 }
1060}
1061
1062/* Return TRUE if the TLS access transition is OK or no transition
1063 will be performed. Update R_TYPE if there is a transition. */
1064
1065static bfd_boolean
1066elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1067 asection *sec, bfd_byte *contents,
1068 Elf_Internal_Shdr *symtab_hdr,
1069 struct elf_link_hash_entry **sym_hashes,
1070 unsigned int *r_type, int tls_type,
1071 const Elf_Internal_Rela *rel,
1072 const Elf_Internal_Rela *relend,
4c544807 1073 struct elf_link_hash_entry *h,
bedfd056
L		 1074 unsigned long r_symndx,
1075 bfd_boolean from_relocate_section)
142411ca
L		 1076{
1077 unsigned int from_type = *r_type;
1078 unsigned int to_type = from_type;
1079 bfd_boolean check = TRUE;
1080
bb1cb422
L		 1081 /* Skip TLS transition for functions. */
1082 if (h != NULL
1083 && (h->type == STT_FUNC
1084 || h->type == STT_GNU_IFUNC))
1085 return TRUE;
1086
142411ca 1087 switch (from_type)
13ae64f3
JJ		 1088 {
1089 case R_386_TLS_GD:
67a4f2b7
AO		 1090 case R_386_TLS_GOTDESC:
1091 case R_386_TLS_DESC_CALL:
13ae64f3 1092 case R_386_TLS_IE_32:
37e55690
JJ		 1093 case R_386_TLS_IE:
1094 case R_386_TLS_GOTIE:
0e1862bb 1095 if (bfd_link_executable (info))
142411ca
L		 1096 {
1097 if (h == NULL)
1098 to_type = R_386_TLS_LE_32;
1099 else if (from_type != R_386_TLS_IE
1100 && from_type != R_386_TLS_GOTIE)
1101 to_type = R_386_TLS_IE_32;
1102 }
1103
bedfd056
L		 1104 /* When we are called from elf_i386_relocate_section, there may
1105 be additional transitions based on TLS_TYPE. */
1106 if (from_relocate_section)
142411ca
L		 1107 {
1108 unsigned int new_to_type = to_type;
1109
51537393 1110 if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type))
142411ca
L		 1111 new_to_type = R_386_TLS_LE_32;
1112
1113 if (to_type == R_386_TLS_GD
1114 || to_type == R_386_TLS_GOTDESC
1115 || to_type == R_386_TLS_DESC_CALL)
1116 {
1117 if (tls_type == GOT_TLS_IE_POS)
1118 new_to_type = R_386_TLS_GOTIE;
1119 else if (tls_type & GOT_TLS_IE)
1120 new_to_type = R_386_TLS_IE_32;
1121 }
1122
1123 /* We checked the transition before when we were called from
1124 elf_i386_check_relocs. We only want to check the new
1125 transition which hasn't been checked before. */
1126 check = new_to_type != to_type && from_type == to_type;
1127 to_type = new_to_type;
1128 }
1129
1130 break;
1131
13ae64f3 1132 case R_386_TLS_LDM:
0e1862bb 1133 if (bfd_link_executable (info))
142411ca
L		 1134 to_type = R_386_TLS_LE_32;
1135 break;
1136
1137 default:
1138 return TRUE;
1139 }
1140
1141 /* Return TRUE if there is no transition. */
1142 if (from_type == to_type)
1143 return TRUE;
1144
1145 /* Check if the transition can be performed. */
1146 if (check
bedfd056 1147 && ! elf_i386_check_tls_transition (sec, contents,
142411ca
L		 1148 symtab_hdr, sym_hashes,
1149 from_type, rel, relend))
1150 {
2f629d23 1151 reloc_howto_type *from, *to;
4c544807 1152 const char *name;
142411ca 1153
b366503e
L		 1154 from = elf_i386_rtype_to_howto (from_type);
1155 to = elf_i386_rtype_to_howto (to_type);
142411ca 1156
4c544807
L		 1157 if (h)
1158 name = h->root.root.string;
1159 else
1160 {
0afcef53 1161 struct elf_x86_link_hash_table *htab;
4dfe6ac6 1162
0afcef53 1163 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 1164 if (htab == NULL)
1165 name = "*unknown*";
1166 else
1167 {
1168 Elf_Internal_Sym *isym;
1169
1170 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1171 abfd, r_symndx);
1172 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1173 }
4c544807
L		 1174 }
1175
4eca0228 1176 _bfd_error_handler
695344c0 1177 /* xgettext:c-format */
2dcf00ce
AM		 1178 (_("%pB: TLS transition from %s to %s against `%s'"
1179 " at %#" PRIx64 " in section `%pA' failed"),
c08bb8dd 1180 abfd, from->name, to->name, name,
2dcf00ce 1181 (uint64_t) rel->r_offset, sec);
142411ca
L		 1182 bfd_set_error (bfd_error_bad_value);
1183 return FALSE;
13ae64f3
JJ		 1184 }
1185
142411ca
L		 1186 *r_type = to_type;
1187 return TRUE;
13ae64f3
JJ		 1188}
1189
c175a657
L		 1190/* With the local symbol, foo, we convert
1191 mov foo@GOT[(%reg1)], %reg2
1192 to
1193 lea foo[@GOTOFF(%reg1)], %reg2
1194 and convert
1195 call/jmp *foo@GOT[(%reg)]
1196 to
1197 nop call foo/jmp foo nop
1198 When PIC is false, convert
1199 test %reg1, foo@GOT[(%reg2)]
1200 to
1201 test $foo, %reg1
1202 and convert
1203 binop foo@GOT[(%reg1)], %reg2
1204 to
1205 binop $foo, %reg2
1206 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1207 instructions. */
1208
1209static
1210bfd_boolean
1211elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1212 bfd_byte *contents,
6999821f 1213 unsigned int *r_type_p,
c175a657
L		 1214 Elf_Internal_Rela *irel,
1215 struct elf_link_hash_entry *h,
5e5e02ae 1216 bfd_boolean *converted,
c175a657
L		 1217 struct bfd_link_info *link_info)
1218{
0afcef53 1219 struct elf_x86_link_hash_table *htab;
c175a657
L		 1220 unsigned int opcode;
1221 unsigned int modrm;
1222 bfd_boolean baseless;
1223 Elf_Internal_Sym *isym;
1224 unsigned int addend;
1225 unsigned int nop;
1226 bfd_vma nop_offset;
1227 bfd_boolean is_pic;
1228 bfd_boolean to_reloc_32;
1229 unsigned int r_type;
1230 unsigned int r_symndx;
1231 bfd_vma roff = irel->r_offset;
0a27fed7
L		 1232 bfd_boolean local_ref;
1233 struct elf_x86_link_hash_entry *eh;
c175a657
L		 1234
1235 if (roff < 2)
1236 return TRUE;
1237
7d4d9709 1238 /* Addend for R_386_GOT32X relocations must be 0. */
c175a657
L		 1239 addend = bfd_get_32 (abfd, contents + roff);
1240 if (addend != 0)
1241 return TRUE;
1242
0afcef53 1243 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
c175a657
L		 1244 is_pic = bfd_link_pic (link_info);
1245
6999821f 1246 r_type = *r_type_p;
c175a657
L		 1247 r_symndx = ELF32_R_SYM (irel->r_info);
1248
1249 modrm = bfd_get_8 (abfd, contents + roff - 1);
1250 baseless = (modrm & 0xc7) == 0x5;
1251
7d4d9709 1252 if (baseless && is_pic)
c175a657
L		 1253 {
1254 /* For PIC, disallow R_386_GOT32X without a base register
7d4d9709 1255 since we don't know what the GOT base is. */
c175a657
L		 1256 const char *name;
1257
1258 if (h == NULL)
1259 {
1260 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1261 r_symndx);
1262 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1263 }
1264 else
1265 name = h->root.root.string;
1266
4eca0228 1267 _bfd_error_handler
695344c0 1268 /* xgettext:c-format */
871b3ab2 1269 (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
63a5468a 1270 " register can not be used when making a shared object"),
c175a657
L		 1271 abfd, name);
1272 return FALSE;
1273 }
1274
1275 opcode = bfd_get_8 (abfd, contents + roff - 2);
1276
c175a657
L		 1277 /* Convert to R_386_32 if PIC is false or there is no base
1278 register. */
1279 to_reloc_32 = !is_pic || baseless;
1280
0a27fed7
L		 1281 eh = elf_x86_hash_entry (h);
1282
7d4d9709
L		 1283 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1284 reloc. */
c175a657
L		 1285 if (h == NULL)
1286 {
1287 if (opcode == 0x0ff)
1288 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1289 goto convert_branch;
1290 else
1291 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1292 "test %reg1, foo@GOT(%reg2)" and
1293 "binop foo@GOT[(%reg1)], %reg2". */
1294 goto convert_load;
1295 }
1296
0a27fed7
L		 1297 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1298 local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
1299
c175a657
L		 1300 /* Undefined weak symbol is only bound locally in executable
1301 and its reference is resolved as 0. */
0a27fed7
L		 1302 if (h->root.type == bfd_link_hash_undefweak
1303 && !eh->linker_def
1304 && local_ref)
c175a657
L		 1305 {
1306 if (opcode == 0xff)
1307 {
1308 /* No direct branch to 0 for PIC. */
1309 if (is_pic)
1310 return TRUE;
1311 else
1312 goto convert_branch;
1313 }
1314 else
1315 {
1316 /* We can convert load of address 0 to R_386_32. */
1317 to_reloc_32 = TRUE;
1318 goto convert_load;
1319 }
1320 }
1321
1322 if (opcode == 0xff)
1323 {
1324 /* We have "call/jmp *foo@GOT[(%reg)]". */
1325 if ((h->root.type == bfd_link_hash_defined
1326 || h->root.type == bfd_link_hash_defweak)
0a27fed7 1327 && local_ref)
c175a657
L		 1328 {
1329 /* The function is locally defined. */
1330convert_branch:
1331 /* Convert R_386_GOT32X to R_386_PC32. */
1332 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1333 {
1334 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1335 is a nop prefix. */
1336 modrm = 0xe8;
6eaa7fb5
L		 1337 /* To support TLS optimization, always use addr32 prefix
1338 for "call *___tls_get_addr@GOT(%reg)". */
1d4af308 1339 if (eh && eh->tls_get_addr)
c175a657 1340 {
6eaa7fb5
L		 1341 nop = 0x67;
1342 nop_offset = irel->r_offset - 2;
c175a657
L		 1343 }
1344 else
6eaa7fb5
L		 1345 {
1346 nop = link_info->call_nop_byte;
1347 if (link_info->call_nop_as_suffix)
1348 {
1349 nop_offset = roff + 3;
1350 irel->r_offset -= 1;
1351 }
1352 else
1353 nop_offset = roff - 2;
1354 }
c175a657
L		 1355 }
1356 else
1357 {
1358 /* Convert to "jmp foo nop". */
1359 modrm = 0xe9;
1360 nop = NOP_OPCODE;
1361 nop_offset = roff + 3;
1362 irel->r_offset -= 1;
1363 }
1364
1365 bfd_put_8 (abfd, nop, contents + nop_offset);
1366 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1367 /* When converting to PC-relative relocation, we
1368 need to adjust addend by -4. */
1369 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1370 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
6999821f 1371 *r_type_p = R_386_PC32;
5e5e02ae 1372 *converted = TRUE;
c175a657
L		 1373 }
1374 }
1375 else
1376 {
1377 /* We have "mov foo@GOT[(%re1g)], %reg2",
1378 "test %reg1, foo@GOT(%reg2)" and
1379 "binop foo@GOT[(%reg1)], %reg2".
1380
1381 Avoid optimizing _DYNAMIC since ld.so may use its
1382 link-time address. */
1383 if (h == htab->elf.hdynamic)
1384 return TRUE;
1385
1386 /* def_regular is set by an assignment in a linker script in
cbd0eecf
L		 1387 bfd_elf_record_link_assignment. start_stop is set on
1388 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1389 if (h->start_stop
0a27fed7 1390 || eh->linker_def
cbd0eecf
L		 1391 || ((h->def_regular
1392 || h->root.type == bfd_link_hash_defined
1393 || h->root.type == bfd_link_hash_defweak)
0a27fed7 1394 && local_ref))
c175a657
L		 1395 {
1396convert_load:
1397 if (opcode == 0x8b)
1398 {
1399 if (to_reloc_32)
1400 {
1401 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1402 "mov $foo, %reg2" with R_386_32. */
1403 r_type = R_386_32;
1404 modrm = 0xc0 | (modrm & 0x38) >> 3;
1405 bfd_put_8 (abfd, modrm, contents + roff - 1);
1406 opcode = 0xc7;
1407 }
1408 else
1409 {
1410 /* Convert "mov foo@GOT(%reg1), %reg2" to
1411 "lea foo@GOTOFF(%reg1), %reg2". */
1412 r_type = R_386_GOTOFF;
1413 opcode = 0x8d;
1414 }
1415 }
1416 else
1417 {
1418 /* Only R_386_32 is supported. */
1419 if (!to_reloc_32)
1420 return TRUE;
1421
1422 if (opcode == 0x85)
1423 {
1424 /* Convert "test %reg1, foo@GOT(%reg2)" to
1425 "test $foo, %reg1". */
1426 modrm = 0xc0 | (modrm & 0x38) >> 3;
1427 opcode = 0xf7;
1428 }
1429 else
1430 {
1431 /* Convert "binop foo@GOT(%reg1), %reg2" to
1432 "binop $foo, %reg2". */
1433 modrm = (0xc0
1434 | (modrm & 0x38) >> 3
1435 | (opcode & 0x3c));
1436 opcode = 0x81;
1437 }
1438 bfd_put_8 (abfd, modrm, contents + roff - 1);
1439 r_type = R_386_32;
1440 }
1441
1442 bfd_put_8 (abfd, opcode, contents + roff - 2);
1443 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
6999821f 1444 *r_type_p = r_type;
5e5e02ae 1445 *converted = TRUE;
c175a657
L		 1446 }
1447 }
1448
1449 return TRUE;
1450}
1451
c1d11331
L		 1452/* Rename some of the generic section flags to better document how they
1453 are used here. */
6999821f 1454#define check_relocs_failed sec_flg0
c1d11331 1455
252b5132 1456/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1457 calculate needed space in the global offset table, procedure linkage
1458 table, and dynamic reloc sections. */
252b5132 1459
b34976b6 1460static bfd_boolean
55fd94b0
AM		 1461elf_i386_check_relocs (bfd *abfd,
1462 struct bfd_link_info *info,
1463 asection *sec,
1464 const Elf_Internal_Rela *relocs)
252b5132 1465{
0afcef53 1466 struct elf_x86_link_hash_table *htab;
252b5132
RH		 1467 Elf_Internal_Shdr *symtab_hdr;
1468 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1469 const Elf_Internal_Rela *rel;
1470 const Elf_Internal_Rela *rel_end;
252b5132 1471 asection *sreloc;
bedfd056 1472 bfd_byte *contents;
5e5e02ae 1473 bfd_boolean converted;
252b5132 1474
0e1862bb 1475 if (bfd_link_relocatable (info))
b34976b6 1476 return TRUE;
252b5132 1477
081b1afe
L		 1478 /* Don't do anything special with non-loaded, non-alloced sections.
1479 In particular, any relocs in such sections should not affect GOT
1480 and PLT reference counting (ie. we don't allow them to create GOT
1481 or PLT entries), there's no possibility or desire to optimize TLS
1482 relocs, and there's not much point in propagating relocs to shared
1483 libs that the dynamic linker won't relocate. */
1484 if ((sec->flags & SEC_ALLOC) == 0)
1485 return TRUE;
1486
0afcef53 1487 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6 1488 if (htab == NULL)
c337a162
L		 1489 {
1490 sec->check_relocs_failed = 1;
1491 return FALSE;
1492 }
4dfe6ac6 1493
fe53b4a4
L		 1494 BFD_ASSERT (is_x86_elf (abfd, htab));
1495
bedfd056
L		 1496 /* Get the section contents. */
1497 if (elf_section_data (sec)->this_hdr.contents != NULL)
1498 contents = elf_section_data (sec)->this_hdr.contents;
1499 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1500 {
1501 sec->check_relocs_failed = 1;
1502 return FALSE;
1503 }
1504
0ffa91dd 1505 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1506 sym_hashes = elf_sym_hashes (abfd);
252b5132 1507
5e5e02ae
L		 1508 converted = FALSE;
1509
252b5132
RH		 1510 sreloc = NULL;
1511
1512 rel_end = relocs + sec->reloc_count;
1513 for (rel = relocs; rel < rel_end; rel++)
1514 {
13ae64f3 1515 unsigned int r_type;
d42c267e 1516 unsigned int r_symndx;
252b5132 1517 struct elf_link_hash_entry *h;
0afcef53 1518 struct elf_x86_link_hash_entry *eh;
4c544807
L		 1519 Elf_Internal_Sym *isym;
1520 const char *name;
06a6a421 1521 bfd_boolean size_reloc;
252b5132
RH		 1522
1523 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1524 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1525
d9bc7a44 1526 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1527 {
695344c0 1528 /* xgettext:c-format */
871b3ab2 1529 _bfd_error_handler (_("%pB: bad symbol index: %d"),
4eca0228 1530 abfd, r_symndx);
c337a162 1531 goto error_return;
f5f31454
L		 1532 }
1533
252b5132 1534 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1535 {
1536 /* A local symbol. */
c2e61a4e
L		 1537 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1538 abfd, r_symndx);
1539 if (isym == NULL)
c337a162 1540 goto error_return;
c25bc9fc
L		 1541
1542 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1543 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1544 {
0afcef53 1545 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1546 if (h == NULL)
c337a162 1547 goto error_return;
6bbec505 1548
c25bc9fc 1549 /* Fake a STT_GNU_IFUNC symbol. */
6322e5c5
L		 1550 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1551 isym, NULL);
c25bc9fc
L		 1552 h->type = STT_GNU_IFUNC;
1553 h->def_regular = 1;
1554 h->ref_regular = 1;
1555 h->forced_local = 1;
1556 h->root.type = bfd_link_hash_defined;
1557 }
1558 else
1559 h = NULL;
1560 }
252b5132 1561 else
71cb9464 1562 {
4c544807 1563 isym = NULL;
71cb9464
L		 1564 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1565 while (h->root.type == bfd_link_hash_indirect
1566 || h->root.type == bfd_link_hash_warning)
1567 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1568 }
cbe950e9 1569
0afcef53 1570 eh = (struct elf_x86_link_hash_entry *) h;
c25bc9fc
L		 1571 if (h != NULL)
1572 {
f604c2a2
L		 1573 if (r_type == R_386_GOTOFF)
1574 eh->gotoff_ref = 1;
cbe950e9 1575
ad1e85de
L		 1576 /* It is referenced by a non-shared object. */
1577 h->ref_regular = 1;
13a2df29
L		 1578
1579 if (h->type == STT_GNU_IFUNC)
1580 elf_tdata (info->output_bfd)->has_gnu_symbols
1581 |= elf_gnu_symbol_ifunc;
71cb9464 1582 }
252b5132 1583
6999821f
L		 1584 if (r_type == R_386_GOT32X
1585 && (h == NULL || h->type != STT_GNU_IFUNC))
1586 {
1587 Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
1588 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
5e5e02ae
L		 1589 &r_type, irel, h,
1590 &converted, info))
6999821f
L		 1591 goto error_return;
1592 }
1593
bedfd056 1594 if (! elf_i386_tls_transition (info, abfd, sec, contents,
142411ca
L		 1595 symtab_hdr, sym_hashes,
1596 &r_type, GOT_UNKNOWN,
bedfd056 1597 rel, rel_end, h, r_symndx, FALSE))
c337a162 1598 goto error_return;
13ae64f3 1599
cd048363
L		 1600 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1601 if (h == htab->elf.hgot)
1602 htab->got_referenced = TRUE;
1603
13ae64f3 1604 switch (r_type)
252b5132 1605 {
37e55690 1606 case R_386_TLS_LDM:
0f09b4d8 1607 htab->tls_ld_or_ldm_got.refcount = 1;
37e55690
JJ		 1608 goto create_got;
1609
1610 case R_386_PLT32:
1611 /* This symbol requires a procedure linkage table entry. We
1612 actually build the entry in adjust_dynamic_symbol,
1613 because this might be a case of linking PIC code which is
1614 never referenced by a dynamic object, in which case we
1615 don't need to generate a procedure linkage table entry
1616 after all. */
1617
1618 /* If this is a local symbol, we resolve it directly without
1619 creating a procedure linkage table entry. */
1620 if (h == NULL)
1621 continue;
1622
98b273dc 1623 eh->zero_undefweak &= 0x2;
f5385ebf 1624 h->needs_plt = 1;
79b0c981 1625 h->plt.refcount = 1;
37e55690
JJ		 1626 break;
1627
6a3e1bae 1628 case R_386_SIZE32:
06a6a421 1629 size_reloc = TRUE;
6a3e1bae
L		 1630 goto do_size;
1631
13ae64f3 1632 case R_386_TLS_IE_32:
37e55690
JJ		 1633 case R_386_TLS_IE:
1634 case R_386_TLS_GOTIE:
0e1862bb 1635 if (!bfd_link_executable (info))
13ae64f3 1636 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1637 /* Fall through */
1638
252b5132 1639 case R_386_GOT32:
02a86693 1640 case R_386_GOT32X:
13ae64f3 1641 case R_386_TLS_GD:
67a4f2b7
AO		 1642 case R_386_TLS_GOTDESC:
1643 case R_386_TLS_DESC_CALL:
252b5132 1644 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1645 {
1646 int tls_type, old_tls_type;
1647
1648 switch (r_type)
1649 {
1650 default:
02a86693
L		 1651 case R_386_GOT32:
1652 case R_386_GOT32X:
1653 tls_type = GOT_NORMAL;
1654 break;
13ae64f3 1655 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1656 case R_386_TLS_GOTDESC:
1657 case R_386_TLS_DESC_CALL:
1658 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1659 case R_386_TLS_IE_32:
1660 if (ELF32_R_TYPE (rel->r_info) == r_type)
1661 tls_type = GOT_TLS_IE_NEG;
1662 else
ebcfb3c0
JJ		 1663 /* If this is a GD->IE transition, we may use either of
1664 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1665 tls_type = GOT_TLS_IE;
1666 break;
1667 case R_386_TLS_IE:
1668 case R_386_TLS_GOTIE:
1669 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1670 }
1671
1672 if (h != NULL)
1673 {
0f09b4d8 1674 h->got.refcount = 1;
0afcef53 1675 old_tls_type = elf_x86_hash_entry (h)->tls_type;
13ae64f3
JJ		 1676 }
1677 else
1678 {
1679 bfd_signed_vma *local_got_refcounts;
1680
1681 /* This is a global offset table entry for a local symbol. */
1682 local_got_refcounts = elf_local_got_refcounts (abfd);
1683 if (local_got_refcounts == NULL)
1684 {
1685 bfd_size_type size;
1686
1687 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1688 size *= (sizeof (bfd_signed_vma)
1689 + sizeof (bfd_vma) + sizeof(char));
a50b1753 1690 local_got_refcounts = (bfd_signed_vma *)
07d6d2b8 1691 bfd_zalloc (abfd, size);
13ae64f3 1692 if (local_got_refcounts == NULL)
c337a162 1693 goto error_return;
13ae64f3 1694 elf_local_got_refcounts (abfd) = local_got_refcounts;
0afcef53 1695 elf_x86_local_tlsdesc_gotent (abfd)
67a4f2b7 1696 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
0afcef53 1697 elf_x86_local_got_tls_type (abfd)
67a4f2b7 1698 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3 1699 }
0f09b4d8 1700 local_got_refcounts[r_symndx] = 1;
0afcef53 1701 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
13ae64f3
JJ		 1702 }
1703
37e55690
JJ		 1704 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1705 tls_type |= old_tls_type;
13ae64f3
JJ		 1706 /* If a TLS symbol is accessed using IE at least once,
1707 there is no point to use dynamic model for it. */
ebcfb3c0 1708 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1709 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1710 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1711 {
67a4f2b7 1712 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1713 tls_type = old_tls_type;
67a4f2b7
AO		 1714 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1715 && GOT_TLS_GD_ANY_P (tls_type))
1716 tls_type |= old_tls_type;
13ae64f3
JJ		 1717 else
1718 {
09a24cbf 1719 if (h)
4c544807
L		 1720 name = h->root.root.string;
1721 else
1722 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1723 NULL);
4eca0228 1724 _bfd_error_handler
695344c0 1725 /* xgettext:c-format */
871b3ab2 1726 (_("%pB: `%s' accessed both as normal and "
55fd94b0 1727 "thread local symbol"),
4c544807 1728 abfd, name);
68c4a57e 1729 bfd_set_error (bfd_error_bad_value);
c337a162 1730 goto error_return;
13ae64f3
JJ		 1731 }
1732 }
1733
1734 if (old_tls_type != tls_type)
1735 {
1736 if (h != NULL)
0afcef53 1737 elf_x86_hash_entry (h)->tls_type = tls_type;
13ae64f3 1738 else
0afcef53 1739 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
13ae64f3
JJ		 1740 }
1741 }
0ac8d2ca
AM		 1742 /* Fall through */
1743
1744 case R_386_GOTOFF:
1745 case R_386_GOTPC:
cd048363 1746create_got:
37e55690 1747 if (r_type != R_386_TLS_IE)
aec6b87e
L		 1748 {
1749 if (eh != NULL)
cd048363
L		 1750 {
1751 eh->zero_undefweak &= 0x2;
1752
1753 /* Need GOT to resolve undefined weak symbol to 0. */
1754 if (r_type == R_386_GOTOFF
1755 && h->root.type == bfd_link_hash_undefweak
1756 && bfd_link_executable (info))
1757 htab->got_referenced = TRUE;
1758 }
aec6b87e
L		 1759 break;
1760 }
37e55690 1761 /* Fall through */
252b5132 1762
37e55690
JJ		 1763 case R_386_TLS_LE_32:
1764 case R_386_TLS_LE:
aec6b87e 1765 if (eh != NULL)
98b273dc 1766 eh->zero_undefweak &= 0x2;
0e1862bb 1767 if (bfd_link_executable (info))
37e55690 1768 break;
bffbf940 1769 info->flags |= DF_STATIC_TLS;
aec6b87e 1770 goto do_relocation;
252b5132
RH		 1771
1772 case R_386_32:
1773 case R_386_PC32:
aec6b87e 1774 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
98b273dc 1775 eh->zero_undefweak |= 0x2;
aec6b87e 1776do_relocation:
bf52d7c7
L		 1777 /* We are called after all symbols have been resolved. Only
1778 relocation against STT_GNU_IFUNC symbol must go through
1779 PLT. */
d1ed1c7d
L		 1780 if (h != NULL
1781 && (bfd_link_executable (info)
bf52d7c7 1782 || h->type == STT_GNU_IFUNC))
6725bdbf 1783 {
79b0c981 1784 bfd_boolean func_pointer_ref = FALSE;
233cc9c1 1785
4b627c18
L		 1786 if (r_type == R_386_PC32)
1787 {
1788 /* Since something like ".long foo - ." may be used
1789 as pointer, make sure that PLT is used if foo is
1790 a function defined in a shared library. */
1791 if ((sec->flags & SEC_CODE) == 0)
1792 h->pointer_equality_needed = 1;
74437ea2
L		 1793 else if (h->type == STT_GNU_IFUNC
1794 && bfd_link_pic (info))
1795 {
6322e5c5
L		 1796 _bfd_error_handler
1797 /* xgettext:c-format */
871b3ab2 1798 (_("%pB: unsupported non-PIC call to IFUNC `%s'"),
6322e5c5 1799 abfd, h->root.root.string);
74437ea2
L		 1800 bfd_set_error (bfd_error_bad_value);
1801 goto error_return;
1802 }
4b627c18
L		 1803 }
1804 else
04ebc307
L		 1805 {
1806 h->pointer_equality_needed = 1;
1807 /* R_386_32 can be resolved at run-time. */
1808 if (r_type == R_386_32
1809 && (sec->flags & SEC_READONLY) == 0)
79b0c981
L		 1810 func_pointer_ref = TRUE;
1811 }
1812
1813 if (!func_pointer_ref)
1814 {
1815 /* If this reloc is in a read-only section, we might
1816 need a copy reloc. We can't check reliably at this
1817 stage whether the section is read-only, as input
1818 sections have not yet been mapped to output sections.
1819 Tentatively set the flag for now, and correct in
1820 adjust_dynamic_symbol. */
1821 h->non_got_ref = 1;
1822
1823 /* We may need a .plt entry if the symbol is a function
1824 defined in a shared lib or is a function referenced
1825 from the code or read-only section. */
1826 if (!h->def_regular
1827 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1828 h->plt.refcount = 1;
04ebc307 1829 }
6725bdbf 1830 }
7843f00e 1831
06a6a421 1832 size_reloc = FALSE;
6a3e1bae 1833do_size:
451875b4 1834 if (NEED_DYNAMIC_RELOCATION_P (info, FALSE, h, sec, r_type,
daf1c414 1835 R_386_32))
252b5132 1836 {
e03a8ed8
L		 1837 struct elf_dyn_relocs *p;
1838 struct elf_dyn_relocs **head;
ec338859 1839
12d0ee4a
AM		 1840 /* We must copy these reloc types into the output file.
1841 Create a reloc section in dynobj and make room for
1842 this reloc. */
252b5132
RH		 1843 if (sreloc == NULL)
1844 {
83bac4b0
NC		 1845 sreloc = _bfd_elf_make_dynamic_reloc_section
1846 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1847
252b5132 1848 if (sreloc == NULL)
c337a162 1849 goto error_return;
252b5132
RH		 1850 }
1851
0c715baa
AM		 1852 /* If this is a global symbol, we count the number of
1853 relocations we need for this symbol. */
1854 if (h != NULL)
252b5132 1855 {
d5597ebc 1856 head = &eh->dyn_relocs;
0c715baa
AM		 1857 }
1858 else
1859 {
ec338859
AM		 1860 /* Track dynamic relocs needed for local syms too.
1861 We really need local syms available to do this
1862 easily. Oh well. */
87d72d41 1863 void **vpp;
ec338859 1864 asection *s;
87d72d41
AM		 1865
1866 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1867 abfd, r_symndx);
1868 if (isym == NULL)
c337a162 1869 goto error_return;
87d72d41
AM		 1870
1871 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1872 if (s == NULL)
87d72d41 1873 s = sec;
ec338859 1874
e81d3500 1875 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1876 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 1877 }
1878
1879 p = *head;
1880 if (p == NULL || p->sec != sec)
1881 {
1882 bfd_size_type amt = sizeof *p;
a50b1753 1883 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
07d6d2b8 1884 amt);
ec338859 1885 if (p == NULL)
c337a162 1886 goto error_return;
ec338859
AM		 1887 p->next = *head;
1888 *head = p;
1889 p->sec = sec;
1890 p->count = 0;
1891 p->pc_count = 0;
252b5132 1892 }
ec338859
AM		 1893
1894 p->count += 1;
06a6a421
L		 1895 /* Count size relocation as PC-relative relocation. */
1896 if (r_type == R_386_PC32 || size_reloc)
ec338859 1897 p->pc_count += 1;
252b5132 1898 }
252b5132
RH		 1899 break;
1900
1901 /* This relocation describes the C++ object vtable hierarchy.
1902 Reconstruct it for later use during GC. */
1903 case R_386_GNU_VTINHERIT:
d17e0c6e 1904 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c337a162 1905 goto error_return;
252b5132
RH		 1906 break;
1907
1908 /* This relocation describes which C++ vtable entries are actually
1909 used. Record for later use during GC. */
1910 case R_386_GNU_VTENTRY:
c6aa130f
MS		 1911 BFD_ASSERT (h != NULL);
1912 if (h != NULL
1913 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c337a162 1914 goto error_return;
252b5132
RH		 1915 break;
1916
1917 default:
1918 break;
1919 }
1920 }
1921
bedfd056
L		 1922 if (elf_section_data (sec)->this_hdr.contents != contents)
1923 {
5e5e02ae 1924 if (!converted && !info->keep_memory)
bedfd056
L		 1925 free (contents);
1926 else
1927 {
5e5e02ae
L		 1928 /* Cache the section contents for elf_link_input_bfd if any
1929 load is converted or --no-keep-memory isn't used. */
bedfd056
L		 1930 elf_section_data (sec)->this_hdr.contents = contents;
1931 }
1932 }
1933
5e5e02ae
L		 1934 /* Cache relocations if any load is converted. */
1935 if (elf_section_data (sec)->relocs != relocs && converted)
1936 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
1937
b34976b6 1938 return TRUE;
c337a162
L		 1939
1940error_return:
bedfd056
L		 1941 if (elf_section_data (sec)->this_hdr.contents != contents)
1942 free (contents);
c337a162
L		 1943 sec->check_relocs_failed = 1;
1944 return FALSE;
252b5132
RH		 1945}
1946
38701953
AM		 1947/* Set the correct type for an x86 ELF section. We do this by the
1948 section name, which is a hack, but ought to work. */
1949
b34976b6 1950static bfd_boolean
55fd94b0
AM		 1951elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1952 Elf_Internal_Shdr *hdr,
1953 asection *sec)
38701953 1954{
91d6fa6a 1955 const char *name;
38701953
AM		 1956
1957 name = bfd_get_section_name (abfd, sec);
1958
1959 /* This is an ugly, but unfortunately necessary hack that is
1960 needed when producing EFI binaries on x86. It tells
1961 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1962 containing ELF relocation info. We need this hack in order to
1963 be able to generate ELF binaries that can be translated into
1964 EFI applications (which are essentially COFF objects). Those
1965 files contain a COFF ".reloc" section inside an ELFNN object,
1966 which would normally cause BFD to segfault because it would
1967 attempt to interpret this section as containing relocation
1968 entries for section "oc". With this hack enabled, ".reloc"
1969 will be treated as a normal data section, which will avoid the
1970 segfault. However, you won't be able to create an ELFNN binary
1971 with a section named "oc" that needs relocations, but that's
1972 the kind of ugly side-effects you get when detecting section
1973 types based on their names... In practice, this limitation is
1974 unlikely to bite. */
1975 if (strcmp (name, ".reloc") == 0)
1976 hdr->sh_type = SHT_PROGBITS;
1977
b34976b6 1978 return TRUE;
38701953
AM		 1979}
1980
13ae64f3
JJ		 1981/* Return the relocation value for @tpoff relocation
1982 if STT_TLS virtual address is ADDRESS. */
1983
1984static bfd_vma
eb4ff4d6 1985elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 1986{
e1918d23 1987 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 1988 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
1989 bfd_vma static_tls_size;
13ae64f3 1990
e1918d23
AM		 1991 /* If tls_sec is NULL, we should have signalled an error already. */
1992 if (htab->tls_sec == NULL)
6a30718d 1993 return 0;
7dc98aea
RO		 1994
1995 /* Consider special static TLS alignment requirements. */
1996 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
1997 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 1998}
1999
252b5132
RH		 2000/* Relocate an i386 ELF section. */
2001
b34976b6 2002static bfd_boolean
55fd94b0
AM		 2003elf_i386_relocate_section (bfd *output_bfd,
2004 struct bfd_link_info *info,
2005 bfd *input_bfd,
2006 asection *input_section,
2007 bfd_byte *contents,
2008 Elf_Internal_Rela *relocs,
2009 Elf_Internal_Sym *local_syms,
2010 asection **local_sections)
252b5132 2011{
0afcef53 2012 struct elf_x86_link_hash_table *htab;
252b5132
RH		 2013 Elf_Internal_Shdr *symtab_hdr;
2014 struct elf_link_hash_entry **sym_hashes;
2015 bfd_vma *local_got_offsets;
67a4f2b7 2016 bfd_vma *local_tlsdesc_gotents;
252b5132 2017 Elf_Internal_Rela *rel;
60f2e42e 2018 Elf_Internal_Rela *wrel;
252b5132 2019 Elf_Internal_Rela *relend;
3348747a 2020 bfd_boolean is_vxworks_tls;
25e762b9 2021 unsigned plt_entry_size;
252b5132 2022
c337a162
L		 2023 /* Skip if check_relocs failed. */
2024 if (input_section->check_relocs_failed)
2025 return FALSE;
2026
0afcef53 2027 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 2028 if (htab == NULL)
2029 return FALSE;
fe53b4a4 2030
7af5d5c4
AM		 2031 if (!is_x86_elf (input_bfd, htab))
2032 {
2033 bfd_set_error (bfd_error_wrong_format);
2034 return FALSE;
2035 }
fe53b4a4 2036
0ffa91dd 2037 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 2038 sym_hashes = elf_sym_hashes (input_bfd);
2039 local_got_offsets = elf_local_got_offsets (input_bfd);
0afcef53 2040 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 2041 /* We have to handle relocations in vxworks .tls_vars sections
2042 specially, because the dynamic loader is 'weird'. */
851b6fa1 2043 is_vxworks_tls = (htab->target_os == is_vxworks
07d6d2b8 2044 && bfd_link_pic (info)
3348747a
NS		 2045 && !strcmp (input_section->output_section->name,
2046 ".tls_vars"));
252b5132 2047
0afcef53 2048 _bfd_x86_elf_set_tls_module_base (info);
9f03412a 2049
765e526c 2050 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 2051
60f2e42e 2052 rel = wrel = relocs;
252b5132 2053 relend = relocs + input_section->reloc_count;
60f2e42e 2054 for (; rel < relend; wrel++, rel++)
252b5132 2055 {
419414ea 2056 unsigned int r_type, r_type_tls;
252b5132
RH		 2057 reloc_howto_type *howto;
2058 unsigned long r_symndx;
2059 struct elf_link_hash_entry *h;
0afcef53 2060 struct elf_x86_link_hash_entry *eh;
252b5132
RH		 2061 Elf_Internal_Sym *sym;
2062 asection *sec;
dd7e64d4 2063 bfd_vma off, offplt, plt_offset;
252b5132 2064 bfd_vma relocation;
b34976b6 2065 bfd_boolean unresolved_reloc;
252b5132 2066 bfd_reloc_status_type r;
1b452ec6 2067 unsigned int indx;
13ae64f3 2068 int tls_type;
1788fc08 2069 bfd_vma st_size;
dd7e64d4 2070 asection *resolved_plt;
aec6b87e 2071 bfd_boolean resolved_to_zero;
e133d005 2072 bfd_boolean relative_reloc;
252b5132
RH		 2073
2074 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 2075 if (r_type == R_386_GNU_VTINHERIT
2076 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 2077 {
2078 if (wrel != rel)
2079 *wrel = *rel;
2080 continue;
2081 }
dc47f327 2082
b366503e 2083 howto = elf_i386_rtype_to_howto (r_type);
76268e02 2084 if (howto == NULL)
47aeb64c
NC		 2085 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2086
252b5132 2087 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 2088 h = NULL;
2089 sym = NULL;
2090 sec = NULL;
b34976b6 2091 unresolved_reloc = FALSE;
252b5132
RH		 2092 if (r_symndx < symtab_hdr->sh_info)
2093 {
2094 sym = local_syms + r_symndx;
2095 sec = local_sections[r_symndx];
2096 relocation = (sec->output_section->vma
2097 + sec->output_offset
2098 + sym->st_value);
1788fc08 2099 st_size = sym->st_size;
ab96bf03
AM		 2100
2101 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2102 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 2103 || (bfd_link_relocatable (info)
ab96bf03 2104 && sec->output_offset != 0)))
f8df10f4 2105 {
f8df10f4 2106 bfd_vma addend;
4a335f3d 2107 bfd_byte *where = contents + rel->r_offset;
f8df10f4 2108
4a335f3d 2109 switch (howto->size)
f8df10f4 2110 {
4a335f3d
AM		 2111 case 0:
2112 addend = bfd_get_8 (input_bfd, where);
2113 if (howto->pc_relative)
2114 {
2115 addend = (addend ^ 0x80) - 0x80;
2116 addend += 1;
2117 }
2118 break;
2119 case 1:
2120 addend = bfd_get_16 (input_bfd, where);
2121 if (howto->pc_relative)
2122 {
2123 addend = (addend ^ 0x8000) - 0x8000;
2124 addend += 2;
2125 }
2126 break;
2127 case 2:
2128 addend = bfd_get_32 (input_bfd, where);
2129 if (howto->pc_relative)
2130 {
2131 addend = (addend ^ 0x80000000) - 0x80000000;
2132 addend += 4;
2133 }
2134 break;
2135 default:
2136 abort ();
f8df10f4
JJ		 2137 }
2138
0e1862bb 2139 if (bfd_link_relocatable (info))
ab96bf03
AM		 2140 addend += sec->output_offset;
2141 else
2142 {
2143 asection *msec = sec;
2144 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2145 addend);
2146 addend -= relocation;
2147 addend += msec->output_section->vma + msec->output_offset;
2148 }
4a335f3d
AM		 2149
2150 switch (howto->size)
2151 {
2152 case 0:
16a10388 2153 /* FIXME: overflow checks. */
4a335f3d
AM		 2154 if (howto->pc_relative)
2155 addend -= 1;
2156 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 2157 break;
2158 case 1:
2159 if (howto->pc_relative)
2160 addend -= 2;
2161 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 2162 break;
2163 case 2:
2164 if (howto->pc_relative)
2165 addend -= 4;
2166 bfd_put_32 (input_bfd, addend, where);
2167 break;
2168 }
f8df10f4 2169 }
0e1862bb 2170 else if (!bfd_link_relocatable (info)
1f85278f 2171 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 2172 {
2173 /* Relocate against local STT_GNU_IFUNC symbol. */
0afcef53
L		 2174 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2175 FALSE);
c25bc9fc
L		 2176 if (h == NULL)
2177 abort ();
2178
23209a78 2179 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 2180 h->root.u.def.value = sym->st_value;
2181 h->root.u.def.section = sec;
2182 }
252b5132
RH		 2183 }
2184 else
2185 {
3d540e93 2186 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 2187 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 2188
b2a8e766
AM		 2189 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2190 r_symndx, symtab_hdr, sym_hashes,
2191 h, sec, relocation,
62d887d4 2192 unresolved_reloc, warned, ignored);
1788fc08 2193 st_size = h->size;
252b5132
RH		 2194 }
2195
dbaa2011 2196 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 2197 {
2198 _bfd_clear_contents (howto, input_bfd, input_section,
0930cb30 2199 contents, rel->r_offset);
60f2e42e
L		 2200 wrel->r_offset = rel->r_offset;
2201 wrel->r_info = 0;
2202 wrel->r_addend = 0;
2203
2204 /* For ld -r, remove relocations in debug sections against
2205 sections defined in discarded sections. Not done for
2206 eh_frame editing code expects to be present. */
2207 if (bfd_link_relocatable (info)
2208 && (input_section->flags & SEC_DEBUGGING))
2209 wrel--;
2210
2211 continue;
2212 }
9635fe29 2213
0e1862bb 2214 if (bfd_link_relocatable (info))
2d5da473
L		 2215 {
2216 if (wrel != rel)
2217 *wrel = *rel;
2218 continue;
2219 }
ab96bf03 2220
0afcef53 2221 eh = (struct elf_x86_link_hash_entry *) h;
ee2fdd6f 2222
cbe950e9
L		 2223 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2224 it here if it is defined in a non-shared object. */
2225 if (h != NULL
2226 && h->type == STT_GNU_IFUNC
2227 && h->def_regular)
2228 {
ee2fdd6f 2229 asection *gotplt, *base_got;
cbe950e9 2230 bfd_vma plt_index;
4c544807 2231 const char *name;
cbe950e9 2232
97dc35c8
L		 2233 if ((input_section->flags & SEC_ALLOC) == 0)
2234 {
347a8774
L		 2235 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2236 STT_GNU_IFUNC symbol as STT_FUNC. */
2237 if (elf_section_type (input_section) == SHT_NOTE)
2238 goto skip_ifunc;
97dc35c8
L		 2239 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2240 sections because such sections are not SEC_ALLOC and
2241 thus ld.so will not process them. */
2242 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 2243 continue;
97dc35c8
L		 2244 abort ();
2245 }
cbe950e9
L		 2246
2247 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 2248 if (htab->elf.splt != NULL)
cbe950e9 2249 {
ee2fdd6f
L		 2250 if (htab->plt_second != NULL)
2251 {
2252 resolved_plt = htab->plt_second;
2253 plt_offset = eh->plt_second.offset;
2254 }
2255 else
2256 {
2257 resolved_plt = htab->elf.splt;
2258 plt_offset = h->plt.offset;
2259 }
6de2ae4a 2260 gotplt = htab->elf.sgotplt;
cbe950e9
L		 2261 }
2262 else
2263 {
ee2fdd6f
L		 2264 resolved_plt = htab->elf.iplt;
2265 plt_offset = h->plt.offset;
6de2ae4a 2266 gotplt = htab->elf.igotplt;
cbe950e9
L		 2267 }
2268
cbe950e9
L		 2269 switch (r_type)
2270 {
2271 default:
233cc9c1 2272 break;
cbe950e9
L		 2273
2274 case R_386_GOT32:
02a86693 2275 case R_386_GOT32X:
6de2ae4a 2276 base_got = htab->elf.sgot;
cbe950e9
L		 2277 off = h->got.offset;
2278
7afd84dc 2279 if (base_got == NULL)
cbe950e9
L		 2280 abort ();
2281
7afd84dc 2282 if (off == (bfd_vma) -1)
cbe950e9 2283 {
7afd84dc
L		 2284 /* We can't use h->got.offset here to save state, or
2285 even just remember the offset, as finish_dynamic_symbol
2286 would use that as offset into .got. */
6bbec505 2287
233cc9c1
L		 2288 if (h->plt.offset == (bfd_vma) -1)
2289 abort ();
2290
6de2ae4a 2291 if (htab->elf.splt != NULL)
7afd84dc 2292 {
f604c2a2 2293 plt_index = (h->plt.offset / plt_entry_size
765e526c 2294 - htab->plt.has_plt0);
7afd84dc 2295 off = (plt_index + 3) * 4;
6de2ae4a 2296 base_got = htab->elf.sgotplt;
7afd84dc 2297 }
cbe950e9
L		 2298 else
2299 {
25e762b9 2300 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 2301 off = plt_index * 4;
6de2ae4a 2302 base_got = htab->elf.igotplt;
7afd84dc
L		 2303 }
2304
2305 if (h->dynindx == -1
2306 || h->forced_local
2307 || info->symbolic)
2308 {
2309 /* This references the local defitionion. We must
2310 initialize this entry in the global offset table.
2311 Since the offset must always be a multiple of 8,
2312 we use the least significant bit to record
2313 whether we have initialized it already.
2314
2315 When doing a dynamic link, we create a .rela.got
2316 relocation entry to initialize the value. This
2317 is done in the finish_dynamic_symbol routine. */
2318 if ((off & 1) != 0)
2319 off &= ~1;
2320 else
2321 {
2322 bfd_put_32 (output_bfd, relocation,
2323 base_got->contents + off);
2324 h->got.offset |= 1;
2325 }
cbe950e9 2326 }
cbe950e9 2327
7afd84dc 2328 relocation = off;
7afd84dc
L		 2329 }
2330 else
ca8c86ef
L		 2331 relocation = (base_got->output_section->vma
2332 + base_got->output_offset + off
2333 - gotplt->output_section->vma
2334 - gotplt->output_offset);
2335
2a568401
L		 2336 if (rel->r_offset > 1
2337 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2338 && *(contents + rel->r_offset - 2) != 0x8d)
712ec279
L		 2339 {
2340 if (bfd_link_pic (info))
2341 goto disallow_got32;
2342
2343 /* Add the GOT base if there is no base register. */
2344 relocation += (gotplt->output_section->vma
2345 + gotplt->output_offset);
2346 }
2347 else if (htab->elf.splt == NULL)
2348 {
2349 /* Adjust for static executables. */
2350 relocation += gotplt->output_offset;
2351 }
0018b0a3 2352
cbe950e9 2353 goto do_relocation;
233cc9c1
L		 2354 }
2355
2356 if (h->plt.offset == (bfd_vma) -1)
2357 {
2358 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2359 if (r_type == R_386_32
2360 && (input_section->flags & SEC_CODE) == 0)
2361 goto do_ifunc_pointer;
2362 goto bad_ifunc_reloc;
2363 }
2364
ee2fdd6f
L		 2365 relocation = (resolved_plt->output_section->vma
2366 + resolved_plt->output_offset + plt_offset);
233cc9c1
L		 2367
2368 switch (r_type)
2369 {
2370 default:
2371bad_ifunc_reloc:
2372 if (h->root.root.string)
2373 name = h->root.root.string;
2374 else
2375 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2376 NULL);
4eca0228 2377 _bfd_error_handler
695344c0 2378 /* xgettext:c-format */
871b3ab2 2379 (_("%pB: relocation %s against STT_GNU_IFUNC "
233cc9c1
L		 2380 "symbol `%s' isn't supported"), input_bfd,
2381 howto->name, name);
2382 bfd_set_error (bfd_error_bad_value);
2383 return FALSE;
2384
2385 case R_386_32:
2386 /* Generate dynamic relcoation only when there is a
2387 non-GOT reference in a shared object. */
2388 if ((bfd_link_pic (info) && h->non_got_ref)
2389 || h->plt.offset == (bfd_vma) -1)
2390 {
2391 Elf_Internal_Rela outrel;
2392 asection *sreloc;
2393 bfd_vma offset;
2394
2395do_ifunc_pointer:
2396 /* Need a dynamic relocation to get the real function
2397 adddress. */
2398 offset = _bfd_elf_section_offset (output_bfd,
2399 info,
2400 input_section,
2401 rel->r_offset);
2402 if (offset == (bfd_vma) -1
2403 || offset == (bfd_vma) -2)
2404 abort ();
2405
2406 outrel.r_offset = (input_section->output_section->vma
2407 + input_section->output_offset
2408 + offset);
2409
cf1070f1 2410 if (POINTER_LOCAL_IFUNC_P (info, h))
233cc9c1 2411 {
871b3ab2 2412 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 2413 h->root.root.string,
2414 h->root.u.def.section->owner);
2415
233cc9c1
L		 2416 /* This symbol is resolved locally. */
2417 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2418 bfd_put_32 (output_bfd,
2419 (h->root.u.def.value
2420 + h->root.u.def.section->output_section->vma
2421 + h->root.u.def.section->output_offset),
2422 contents + offset);
2423 }
2424 else
2425 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2426
2427 /* Dynamic relocations are stored in
2428 1. .rel.ifunc section in PIC object.
2429 2. .rel.got section in dynamic executable.
2430 3. .rel.iplt section in static executable. */
2431 if (bfd_link_pic (info))
2432 sreloc = htab->elf.irelifunc;
2433 else if (htab->elf.splt != NULL)
2434 sreloc = htab->elf.srelgot;
2435 else
2436 sreloc = htab->elf.irelplt;
2437 elf_append_rel (output_bfd, sreloc, &outrel);
2438
2439 /* If this reloc is against an external symbol, we
2440 do not want to fiddle with the addend. Otherwise,
2441 we need to include the symbol value so that it
2442 becomes an addend for the dynamic reloc. For an
2443 internal symbol, we have updated addend. */
2444 continue;
2445 }
2446 /* FALLTHROUGH */
2447 case R_386_PC32:
2448 case R_386_PLT32:
2449 goto do_relocation;
cbe950e9
L		 2450
2451 case R_386_GOTOFF:
2452 relocation -= (gotplt->output_section->vma
2453 + gotplt->output_offset);
2454 goto do_relocation;
2455 }
2456 }
2457
347a8774 2458skip_ifunc:
aec6b87e 2459 resolved_to_zero = (eh != NULL
c5bce5c6 2460 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
aec6b87e 2461
252b5132
RH		 2462 switch (r_type)
2463 {
02a86693 2464 case R_386_GOT32X:
252b5132
RH		 2465 case R_386_GOT32:
2466 /* Relocation is to the entry for this symbol in the global
2467 offset table. */
6de2ae4a 2468 if (htab->elf.sgot == NULL)
ffb2e45b 2469 abort ();
252b5132 2470
e133d005 2471 relative_reloc = FALSE;
252b5132
RH		 2472 if (h != NULL)
2473 {
252b5132 2474 off = h->got.offset;
2eba97c2 2475 if (RESOLVED_LOCALLY_P (info, h, htab))
252b5132 2476 {
2eba97c2
L		 2477 /* We must initialize this entry in the global offset
2478 table. Since the offset must always be a multiple
2479 of 4, we use the least significant bit to record
2480 whether we have initialized it already.
252b5132
RH		 2481
2482 When doing a dynamic link, we create a .rel.got
2483 relocation entry to initialize the value. This
2484 is done in the finish_dynamic_symbol routine. */
2485 if ((off & 1) != 0)
2486 off &= ~1;
2487 else
2488 {
2489 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2490 htab->elf.sgot->contents + off);
252b5132 2491 h->got.offset |= 1;
e133d005 2492
f70656b2 2493 if (GENERATE_RELATIVE_RELOC_P (info, h))
e133d005
L		 2494 {
2495 /* PR ld/21402: If this symbol isn't dynamic
0dc9a308 2496 in PIC, generate R_386_RELATIVE here. */
e133d005
L		 2497 eh->no_finish_dynamic_symbol = 1;
2498 relative_reloc = TRUE;
2499 }
252b5132
RH		 2500 }
2501 }
8c694914 2502 else
b34976b6 2503 unresolved_reloc = FALSE;
252b5132
RH		 2504 }
2505 else
2506 {
ffb2e45b
AM		 2507 if (local_got_offsets == NULL)
2508 abort ();
252b5132
RH		 2509
2510 off = local_got_offsets[r_symndx];
2511
2512 /* The offset must always be a multiple of 4. We use
83be169b
AM		 2513 the least significant bit to record whether we have
2514 already generated the necessary reloc. */
252b5132
RH		 2515 if ((off & 1) != 0)
2516 off &= ~1;
2517 else
2518 {
6725bdbf 2519 bfd_put_32 (output_bfd, relocation,
6de2ae4a 2520 htab->elf.sgot->contents + off);
e133d005 2521 local_got_offsets[r_symndx] |= 1;
252b5132 2522
0e1862bb 2523 if (bfd_link_pic (info))
e133d005 2524 relative_reloc = TRUE;
252b5132 2525 }
252b5132
RH		 2526 }
2527
e133d005
L		 2528 if (relative_reloc)
2529 {
2530 asection *s;
2531 Elf_Internal_Rela outrel;
2532
2533 s = htab->elf.srelgot;
2534 if (s == NULL)
2535 abort ();
2536
2537 outrel.r_offset = (htab->elf.sgot->output_section->vma
2538 + htab->elf.sgot->output_offset
2539 + off);
2540 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2541 elf_append_rel (output_bfd, s, &outrel);
2542 }
2543
ffb2e45b
AM		 2544 if (off >= (bfd_vma) -2)
2545 abort ();
2546
74d7f0aa
L		 2547 relocation = (htab->elf.sgot->output_section->vma
2548 + htab->elf.sgot->output_offset + off);
2a568401
L		 2549 if (rel->r_offset > 1
2550 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2551 && *(contents + rel->r_offset - 2) != 0x8d)
74d7f0aa
L		 2552 {
2553 if (bfd_link_pic (info))
2554 {
2555 /* For PIC, disallow R_386_GOT32 without a base
2a568401
L		 2556 register, except for "lea foo@GOT, %reg", since
2557 we don't know what the GOT base is. */
74d7f0aa
L		 2558 const char *name;
2559
712ec279 2560disallow_got32:
a5def14f 2561 if (h == NULL || h->root.root.string == NULL)
74d7f0aa
L		 2562 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2563 NULL);
2564 else
2565 name = h->root.root.string;
2566
4eca0228 2567 _bfd_error_handler
695344c0 2568 /* xgettext:c-format */
871b3ab2 2569 (_("%pB: direct GOT relocation %s against `%s'"
63a5468a
AM		 2570 " without base register can not be used"
2571 " when making a shared object"),
712ec279 2572 input_bfd, howto->name, name);
74d7f0aa
L		 2573 bfd_set_error (bfd_error_bad_value);
2574 return FALSE;
2575 }
2576 }
2577 else
2578 {
2579 /* Subtract the .got.plt section address only with a base
2580 register. */
2581 relocation -= (htab->elf.sgotplt->output_section->vma
2582 + htab->elf.sgotplt->output_offset);
2583 }
2584
252b5132
RH		 2585 break;
2586
2587 case R_386_GOTOFF:
2588 /* Relocation is relative to the start of the global offset
2589 table. */
2590
3d949995
L		 2591 /* Check to make sure it isn't a protected function or data
2592 symbol for shared library since it may not be local when
2593 used as function address or with copy relocation. We also
e3c0e327 2594 need to make sure that a symbol is referenced locally. */
0e1862bb 2595 if (!bfd_link_executable (info) && h)
90f487df 2596 {
41bed6dd
L		 2597 if (!h->def_regular)
2598 {
2599 const char *v;
2600
2601 switch (ELF_ST_VISIBILITY (h->other))
2602 {
2603 case STV_HIDDEN:
2604 v = _("hidden symbol");
2605 break;
2606 case STV_INTERNAL:
2607 v = _("internal symbol");
2608 break;
2609 case STV_PROTECTED:
2610 v = _("protected symbol");
2611 break;
2612 default:
2613 v = _("symbol");
2614 break;
2615 }
2616
4eca0228 2617 _bfd_error_handler
695344c0 2618 /* xgettext:c-format */
871b3ab2 2619 (_("%pB: relocation R_386_GOTOFF against undefined %s"
63a5468a 2620 " `%s' can not be used when making a shared object"),
41bed6dd
L		 2621 input_bfd, v, h->root.root.string);
2622 bfd_set_error (bfd_error_bad_value);
2623 return FALSE;
2624 }
6999821f 2625 else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
3d949995
L		 2626 && (h->type == STT_FUNC
2627 || h->type == STT_OBJECT)
41bed6dd
L		 2628 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2629 {
4eca0228 2630 _bfd_error_handler
695344c0 2631 /* xgettext:c-format */
871b3ab2 2632 (_("%pB: relocation R_386_GOTOFF against protected %s"
63a5468a 2633 " `%s' can not be used when making a shared object"),
3d949995
L		 2634 input_bfd,
2635 h->type == STT_FUNC ? "function" : "data",
2636 h->root.root.string);
41bed6dd
L		 2637 bfd_set_error (bfd_error_bad_value);
2638 return FALSE;
2639 }
90f487df
L		 2640 }
2641
8c37241b
JJ		 2642 /* Note that sgot is not involved in this
2643 calculation. We always want the start of .got.plt. If we
2644 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 2645 permitted by the ABI, we might have to change this
2646 calculation. */
6de2ae4a
L		 2647 relocation -= htab->elf.sgotplt->output_section->vma
2648 + htab->elf.sgotplt->output_offset;
252b5132
RH		 2649 break;
2650
2651 case R_386_GOTPC:
2652 /* Use global offset table as symbol value. */
6de2ae4a
L		 2653 relocation = htab->elf.sgotplt->output_section->vma
2654 + htab->elf.sgotplt->output_offset;
b34976b6 2655 unresolved_reloc = FALSE;
252b5132
RH		 2656 break;
2657
2658 case R_386_PLT32:
2659 /* Relocation is to the entry for this symbol in the
2660 procedure linkage table. */
2661
dd5724d5 2662 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 2663 without using the procedure linkage table. */
252b5132
RH		 2664 if (h == NULL)
2665 break;
2666
dd7e64d4
L		 2667 if ((h->plt.offset == (bfd_vma) -1
2668 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 2669 || htab->elf.splt == NULL)
252b5132
RH		 2670 {
2671 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 2672 happens when statically linking PIC code, or when
2673 using -Bsymbolic. */
252b5132
RH		 2674 break;
2675 }
2676
dd7e64d4
L		 2677 if (h->plt.offset != (bfd_vma) -1)
2678 {
ee2fdd6f
L		 2679 if (htab->plt_second != NULL)
2680 {
2681 resolved_plt = htab->plt_second;
2682 plt_offset = eh->plt_second.offset;
2683 }
2684 else
2685 {
2686 resolved_plt = htab->elf.splt;
2687 plt_offset = h->plt.offset;
2688 }
dd7e64d4
L		 2689 }
2690 else
2691 {
2692 resolved_plt = htab->plt_got;
2693 plt_offset = eh->plt_got.offset;
2694 }
2695
2696 relocation = (resolved_plt->output_section->vma
2697 + resolved_plt->output_offset
2698 + plt_offset);
b34976b6 2699 unresolved_reloc = FALSE;
252b5132
RH		 2700 break;
2701
1788fc08 2702 case R_386_SIZE32:
1788fc08
L		 2703 /* Set to symbol size. */
2704 relocation = st_size;
2705 /* Fall through. */
2706
252b5132
RH		 2707 case R_386_32:
2708 case R_386_PC32:
3348747a
NS		 2709 if ((input_section->flags & SEC_ALLOC) == 0
2710 || is_vxworks_tls)
ec338859
AM		 2711 break;
2712
aebcc8ff
L		 2713 if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type,
2714 FALSE, resolved_to_zero,
2715 (r_type == R_386_PC32)))
252b5132 2716 {
947216bf 2717 Elf_Internal_Rela outrel;
b34976b6 2718 bfd_boolean skip, relocate;
0c715baa 2719 asection *sreloc;
252b5132
RH		 2720
2721 /* When generating a shared object, these relocations
2722 are copied into the output file to be resolved at run
2723 time. */
2724
b34976b6
AM		 2725 skip = FALSE;
2726 relocate = FALSE;
252b5132 2727
c629eae0
JJ		 2728 outrel.r_offset =
2729 _bfd_elf_section_offset (output_bfd, info, input_section,
2730 rel->r_offset);
2731 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2732 skip = TRUE;
0bb2d96a 2733 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2734 skip = TRUE, relocate = TRUE;
252b5132
RH		 2735 outrel.r_offset += (input_section->output_section->vma
2736 + input_section->output_offset);
2737
2738 if (skip)
0bb2d96a 2739 memset (&outrel, 0, sizeof outrel);
e74399c4 2740 else if (COPY_INPUT_RELOC_P (info, h, r_type))
0bb2d96a 2741 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2742 else
2743 {
5a15f56f 2744 /* This symbol is local, or marked to become local. */
b34976b6 2745 relocate = TRUE;
5a15f56f 2746 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 2747 }
2748
cbe950e9 2749 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 2750
62d78908
L		 2751 if (sreloc == NULL || sreloc->contents == NULL)
2752 {
2753 r = bfd_reloc_notsupported;
2754 goto check_relocation_error;
2755 }
0c715baa 2756
59d6ffb2 2757 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 2758
2759 /* If this reloc is against an external symbol, we do
2760 not want to fiddle with the addend. Otherwise, we
2761 need to include the symbol value so that it becomes
2762 an addend for the dynamic reloc. */
0f88be7a 2763 if (! relocate)
252b5132
RH		 2764 continue;
2765 }
252b5132
RH		 2766 break;
2767
37e55690 2768 case R_386_TLS_IE:
0e1862bb 2769 if (!bfd_link_executable (info))
37e55690 2770 {
947216bf 2771 Elf_Internal_Rela outrel;
37e55690 2772 asection *sreloc;
37e55690
JJ		 2773
2774 outrel.r_offset = rel->r_offset
2775 + input_section->output_section->vma
2776 + input_section->output_offset;
2777 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2778 sreloc = elf_section_data (input_section)->sreloc;
2779 if (sreloc == NULL)
2780 abort ();
59d6ffb2 2781 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 2782 }
2783 /* Fall through */
2784
13ae64f3 2785 case R_386_TLS_GD:
67a4f2b7
AO		 2786 case R_386_TLS_GOTDESC:
2787 case R_386_TLS_DESC_CALL:
13ae64f3 2788 case R_386_TLS_IE_32:
37e55690 2789 case R_386_TLS_GOTIE:
13ae64f3
JJ		 2790 tls_type = GOT_UNKNOWN;
2791 if (h == NULL && local_got_offsets)
0afcef53 2792 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
13ae64f3 2793 else if (h != NULL)
0afcef53 2794 tls_type = elf_x86_hash_entry(h)->tls_type;
37e55690
JJ		 2795 if (tls_type == GOT_TLS_IE)
2796 tls_type = GOT_TLS_IE_NEG;
142411ca 2797
419414ea 2798 r_type_tls = r_type;
142411ca
L		 2799 if (! elf_i386_tls_transition (info, input_bfd,
2800 input_section, contents,
2801 symtab_hdr, sym_hashes,
419414ea 2802 &r_type_tls, tls_type, rel,
bedfd056 2803 relend, h, r_symndx, TRUE))
142411ca 2804 return FALSE;
13ae64f3 2805
419414ea 2806 if (r_type_tls == R_386_TLS_LE_32)
13ae64f3 2807 {
82e51918 2808 BFD_ASSERT (! unresolved_reloc);
419414ea 2809 if (r_type == R_386_TLS_GD)
13ae64f3 2810 {
142411ca 2811 unsigned int type;
13ae64f3
JJ		 2812 bfd_vma roff;
2813
2814 /* GD->LE transition. */
6eaa7fb5 2815 type = *(contents + rel->r_offset - 2);
13ae64f3
JJ		 2816 if (type == 0x04)
2817 {
6eaa7fb5
L		 2818 /* Change
2819 leal foo@tlsgd(,%ebx,1), %eax
2820 call ___tls_get_addr@PLT
2821 into:
2822 movl %gs:0, %eax
2823 subl $foo@tpoff, %eax
13ae64f3 2824 (6 byte form of subl). */
142411ca 2825 roff = rel->r_offset + 5;
13ae64f3
JJ		 2826 }
2827 else
2828 {
6eaa7fb5
L		 2829 /* Change
2830 leal foo@tlsgd(%ebx), %eax
2831 call ___tls_get_addr@PLT
2832 nop
2833 or
2834 leal foo@tlsgd(%reg), %eax
2835 call *___tls_get_addr@GOT(%reg)
2836 which may be converted to
2837 addr32 call ___tls_get_addr
2838 into:
2839 movl %gs:0, %eax; subl $foo@tpoff, %eax
142411ca 2840 (6 byte form of subl). */
142411ca 2841 roff = rel->r_offset + 6;
13ae64f3 2842 }
6eaa7fb5
L		 2843 memcpy (contents + roff - 8,
2844 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
eb4ff4d6 2845 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 2846 contents + roff);
6eaa7fb5 2847 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
13ae64f3 2848 rel++;
60f2e42e 2849 wrel++;
13ae64f3
JJ		 2850 continue;
2851 }
419414ea 2852 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 2853 {
2854 /* GDesc -> LE transition.
2855 It's originally something like:
2856 leal x@tlsdesc(%ebx), %eax
2857
2858 leal x@ntpoff, %eax
2859
2860 Registers other than %eax may be set up here. */
2861
142411ca 2862 unsigned int val;
67a4f2b7
AO		 2863 bfd_vma roff;
2864
67a4f2b7 2865 roff = rel->r_offset;
67a4f2b7 2866 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 2867
2868 /* Now modify the instruction as appropriate. */
2869 /* aoliva FIXME: remove the above and xor the byte
2870 below with 0x86. */
2871 bfd_put_8 (output_bfd, val ^ 0x86,
2872 contents + roff - 1);
eb4ff4d6 2873 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 2874 contents + roff);
2875 continue;
2876 }
419414ea 2877 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 2878 {
2879 /* GDesc -> LE transition.
2880 It's originally:
2881 call *(%eax)
2882 Turn it into:
142411ca 2883 xchg %ax,%ax */
67a4f2b7 2884
67a4f2b7 2885 bfd_vma roff;
6bbec505 2886
67a4f2b7 2887 roff = rel->r_offset;
10efb593 2888 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 2889 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2890 continue;
2891 }
419414ea 2892 else if (r_type == R_386_TLS_IE)
13ae64f3 2893 {
142411ca 2894 unsigned int val;
13ae64f3
JJ		 2895
2896 /* IE->LE transition:
37e55690
JJ		 2897 Originally it can be one of:
2898 movl foo, %eax
2899 movl foo, %reg
2900 addl foo, %reg
2901 We change it into:
2902 movl $foo, %eax
2903 movl $foo, %reg
2904 addl $foo, %reg. */
37e55690 2905 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 2906 if (val == 0xa1)
2907 {
2908 /* movl foo, %eax. */
55fd94b0
AM		 2909 bfd_put_8 (output_bfd, 0xb8,
2910 contents + rel->r_offset - 1);
37e55690 2911 }
299bf759 2912 else
37e55690 2913 {
142411ca
L		 2914 unsigned int type;
2915
55fd94b0
AM		 2916 type = bfd_get_8 (input_bfd,
2917 contents + rel->r_offset - 2);
299bf759 2918 switch (type)
26e41594 2919 {
299bf759
L		 2920 case 0x8b:
2921 /* movl */
299bf759
L		 2922 bfd_put_8 (output_bfd, 0xc7,
2923 contents + rel->r_offset - 2);
2924 bfd_put_8 (output_bfd,
2925 0xc0 | ((val >> 3) & 7),
2926 contents + rel->r_offset - 1);
2927 break;
2928 case 0x03:
2929 /* addl */
299bf759
L		 2930 bfd_put_8 (output_bfd, 0x81,
2931 contents + rel->r_offset - 2);
2932 bfd_put_8 (output_bfd,
2933 0xc0 | ((val >> 3) & 7),
2934 contents + rel->r_offset - 1);
2935 break;
2936 default:
2937 BFD_FAIL ();
2938 break;
26e41594 2939 }
37e55690 2940 }
eb4ff4d6 2941 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 2942 contents + rel->r_offset);
2943 continue;
2944 }
2945 else
2946 {
2947 unsigned int val, type;
2948
2949 /* {IE_32,GOTIE}->LE transition:
2950 Originally it can be one of:
13ae64f3 2951 subl foo(%reg1), %reg2
13ae64f3 2952 movl foo(%reg1), %reg2
37e55690 2953 addl foo(%reg1), %reg2
13ae64f3
JJ		 2954 We change it into:
2955 subl $foo, %reg2
37e55690
JJ		 2956 movl $foo, %reg2 (6 byte form)
2957 addl $foo, %reg2. */
13ae64f3
JJ		 2958 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2959 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 2960 if (type == 0x8b)
2961 {
2962 /* movl */
13ae64f3
JJ		 2963 bfd_put_8 (output_bfd, 0xc7,
2964 contents + rel->r_offset - 2);
2965 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2966 contents + rel->r_offset - 1);
2967 }
2968 else if (type == 0x2b)
2969 {
2970 /* subl */
13ae64f3
JJ		 2971 bfd_put_8 (output_bfd, 0x81,
2972 contents + rel->r_offset - 2);
2973 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2974 contents + rel->r_offset - 1);
2975 }
37e55690
JJ		 2976 else if (type == 0x03)
2977 {
2978 /* addl */
2979 bfd_put_8 (output_bfd, 0x81,
2980 contents + rel->r_offset - 2);
2981 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2982 contents + rel->r_offset - 1);
2983 }
13ae64f3
JJ		 2984 else
2985 BFD_FAIL ();
419414ea 2986 if (r_type == R_386_TLS_GOTIE)
eb4ff4d6 2987 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 2988 contents + rel->r_offset);
2989 else
eb4ff4d6 2990 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 2991 contents + rel->r_offset);
13ae64f3
JJ		 2992 continue;
2993 }
2994 }
2995
6de2ae4a 2996 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 2997 abort ();
2998
2999 if (h != NULL)
67a4f2b7
AO		 3000 {
3001 off = h->got.offset;
0afcef53 3002 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
67a4f2b7 3003 }
13ae64f3
JJ		 3004 else
3005 {
3006 if (local_got_offsets == NULL)
3007 abort ();
3008
3009 off = local_got_offsets[r_symndx];
67a4f2b7 3010 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 3011 }
3012
3013 if ((off & 1) != 0)
3014 off &= ~1;
26e41594 3015 else
13ae64f3 3016 {
947216bf 3017 Elf_Internal_Rela outrel;
91d6fa6a 3018 int dr_type;
67a4f2b7 3019 asection *sreloc;
13ae64f3 3020
6de2ae4a 3021 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3022 abort ();
3023
67a4f2b7
AO		 3024 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3025
3026 if (GOT_TLS_GDESC_P (tls_type))
3027 {
59d6ffb2 3028 bfd_byte *loc;
67a4f2b7
AO		 3029 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3030 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 3031 <= htab->elf.sgotplt->size);
3032 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3033 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 3034 + offplt
3035 + htab->sgotplt_jump_table_size);
6de2ae4a 3036 sreloc = htab->elf.srelplt;
67a4f2b7 3037 loc = sreloc->contents;
765e526c 3038 loc += (htab->next_tls_desc_index++
5ae0bfb6 3039 * sizeof (Elf32_External_Rel));
67a4f2b7 3040 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 3041 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 3042 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3043 if (indx == 0)
3044 {
3045 BFD_ASSERT (! unresolved_reloc);
3046 bfd_put_32 (output_bfd,
0afcef53 3047 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3048 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3049 + htab->sgotplt_jump_table_size + 4);
3050 }
3051 else
3052 {
3053 bfd_put_32 (output_bfd, 0,
6de2ae4a 3054 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 3055 + htab->sgotplt_jump_table_size + 4);
3056 }
3057 }
3058
6de2ae4a 3059 sreloc = htab->elf.srelgot;
67a4f2b7 3060
6de2ae4a
L		 3061 outrel.r_offset = (htab->elf.sgot->output_section->vma
3062 + htab->elf.sgot->output_offset + off);
13ae64f3 3063
67a4f2b7 3064 if (GOT_TLS_GD_P (tls_type))
13ae64f3 3065 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 3066 else if (GOT_TLS_GDESC_P (tls_type))
3067 goto dr_done;
37e55690
JJ		 3068 else if (tls_type == GOT_TLS_IE_POS)
3069 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 3070 else
3071 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 3072
37e55690 3073 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6 3074 bfd_put_32 (output_bfd,
0afcef53 3075 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3076 htab->elf.sgot->contents + off);
37e55690 3077 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 3078 bfd_put_32 (output_bfd,
0afcef53 3079 _bfd_x86_elf_dtpoff_base (info) - relocation,
6de2ae4a 3080 htab->elf.sgot->contents + off);
67a4f2b7 3081 else if (dr_type != R_386_TLS_DESC)
c366c25e 3082 bfd_put_32 (output_bfd, 0,
6de2ae4a 3083 htab->elf.sgot->contents + off);
13ae64f3 3084 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 3085
59d6ffb2 3086 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 3087
67a4f2b7 3088 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 3089 {
3090 if (indx == 0)
3091 {
07d6d2b8 3092 BFD_ASSERT (! unresolved_reloc);
13ae64f3 3093 bfd_put_32 (output_bfd,
0afcef53 3094 relocation - _bfd_x86_elf_dtpoff_base (info),
6de2ae4a 3095 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3096 }
3097 else
3098 {
3099 bfd_put_32 (output_bfd, 0,
6de2ae4a 3100 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 3101 outrel.r_info = ELF32_R_INFO (indx,
3102 R_386_TLS_DTPOFF32);
3103 outrel.r_offset += 4;
59d6ffb2 3104 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 3105 }
3106 }
37e55690
JJ		 3107 else if (tls_type == GOT_TLS_IE_BOTH)
3108 {
3109 bfd_put_32 (output_bfd,
eb4ff4d6 3110 (indx == 0
0afcef53 3111 ? relocation - _bfd_x86_elf_dtpoff_base (info)
eb4ff4d6 3112 : 0),
6de2ae4a 3113 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 3114 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3115 outrel.r_offset += 4;
59d6ffb2 3116 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 3117 }
13ae64f3 3118
67a4f2b7 3119 dr_done:
13ae64f3
JJ		 3120 if (h != NULL)
3121 h->got.offset |= 1;
3122 else
3123 local_got_offsets[r_symndx] |= 1;
3124 }
3125
67a4f2b7
AO		 3126 if (off >= (bfd_vma) -2
3127 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 3128 abort ();
419414ea
L		 3129 if (r_type_tls == R_386_TLS_GOTDESC
3130 || r_type_tls == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3131 {
3132 relocation = htab->sgotplt_jump_table_size + offplt;
3133 unresolved_reloc = FALSE;
3134 }
419414ea 3135 else if (r_type_tls == r_type)
13ae64f3 3136 {
6de2ae4a
L		 3137 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3138 + htab->elf.sgotplt->output_offset;
3139 relocation = htab->elf.sgot->output_section->vma
3140 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 3141 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3142 && tls_type == GOT_TLS_IE_BOTH)
3143 relocation += 4;
3144 if (r_type == R_386_TLS_IE)
8c37241b 3145 relocation += g_o_t;
b34976b6 3146 unresolved_reloc = FALSE;
13ae64f3 3147 }
419414ea 3148 else if (r_type == R_386_TLS_GD)
13ae64f3
JJ		 3149 {
3150 unsigned int val, type;
3151 bfd_vma roff;
3152
3153 /* GD->IE transition. */
6eaa7fb5
L		 3154 type = *(contents + rel->r_offset - 2);
3155 val = *(contents + rel->r_offset - 1);
13ae64f3
JJ		 3156 if (type == 0x04)
3157 {
6eaa7fb5
L		 3158 /* Change
3159 leal foo@tlsgd(,%ebx,1), %eax
3160 call ___tls_get_addr@PLT
3161 into:
3162 movl %gs:0, %eax
3163 subl $foo@gottpoff(%ebx), %eax. */
13ae64f3 3164 val >>= 3;
142411ca 3165 roff = rel->r_offset - 3;
13ae64f3
JJ		 3166 }
3167 else
3168 {
6eaa7fb5
L		 3169 /* Change
3170 leal foo@tlsgd(%ebx), %eax
3171 call ___tls_get_addr@PLT
3172 nop
3173 or
3174 leal foo@tlsgd(%reg), %eax
3175 call *___tls_get_addr@GOT(%reg)
3176 which may be converted to
3177 addr32 call ___tls_get_addr
3178 into:
3179 movl %gs:0, %eax;
3180 subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 3181 roff = rel->r_offset - 2;
3182 }
3183 memcpy (contents + roff,
3184 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3185 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 3186 /* If foo is used only with foo@gotntpoff(%reg) and
3187 foo@indntpoff, but not with foo@gottpoff(%reg), change
3188 subl $foo@gottpoff(%reg), %eax
3189 into:
3190 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 3191 if (tls_type == GOT_TLS_IE_POS)
3192 contents[roff + 6] = 0x03;
8c37241b 3193 bfd_put_32 (output_bfd,
6de2ae4a
L		 3194 htab->elf.sgot->output_section->vma
3195 + htab->elf.sgot->output_offset + off
3196 - htab->elf.sgotplt->output_section->vma
3197 - htab->elf.sgotplt->output_offset,
13ae64f3 3198 contents + roff + 8);
6eaa7fb5 3199 /* Skip R_386_PLT32 and R_386_GOT32X. */
13ae64f3 3200 rel++;
60f2e42e 3201 wrel++;
13ae64f3
JJ		 3202 continue;
3203 }
419414ea 3204 else if (r_type == R_386_TLS_GOTDESC)
67a4f2b7
AO		 3205 {
3206 /* GDesc -> IE transition.
3207 It's originally something like:
3208 leal x@tlsdesc(%ebx), %eax
3209
3210 Change it to:
142411ca 3211 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 3212 or:
3213 movl x@gottpoff(%ebx), %eax # before negl %eax
3214
3215 Registers other than %eax may be set up here. */
3216
67a4f2b7
AO		 3217 bfd_vma roff;
3218
3219 /* First, make sure it's a leal adding ebx to a 32-bit
3220 offset into any register, although it's probably
3221 almost always going to be eax. */
3222 roff = rel->r_offset;
67a4f2b7
AO		 3223
3224 /* Now modify the instruction as appropriate. */
3225 /* To turn a leal into a movl in the form we use it, it
3226 suffices to change the first byte from 0x8d to 0x8b.
3227 aoliva FIXME: should we decide to keep the leal, all
3228 we have to do is remove the statement below, and
3229 adjust the relaxation of R_386_TLS_DESC_CALL. */
3230 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3231
3232 if (tls_type == GOT_TLS_IE_BOTH)
3233 off += 4;
3234
3235 bfd_put_32 (output_bfd,
6de2ae4a
L		 3236 htab->elf.sgot->output_section->vma
3237 + htab->elf.sgot->output_offset + off
3238 - htab->elf.sgotplt->output_section->vma
3239 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 3240 contents + roff);
3241 continue;
3242 }
419414ea 3243 else if (r_type == R_386_TLS_DESC_CALL)
67a4f2b7
AO		 3244 {
3245 /* GDesc -> IE transition.
3246 It's originally:
3247 call *(%eax)
3248
3249 Change it to:
142411ca 3250 xchg %ax,%ax
67a4f2b7
AO		 3251 or
3252 negl %eax
3253 depending on how we transformed the TLS_GOTDESC above.
3254 */
3255
67a4f2b7
AO		 3256 bfd_vma roff;
3257
67a4f2b7 3258 roff = rel->r_offset;
67a4f2b7
AO		 3259
3260 /* Now modify the instruction as appropriate. */
3261 if (tls_type != GOT_TLS_IE_NEG)
3262 {
10efb593
L		 3263 /* xchg %ax,%ax */
3264 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3265 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3266 }
3267 else
3268 {
3269 /* negl %eax */
3270 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3271 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3272 }
3273
3274 continue;
3275 }
3276 else
3277 BFD_ASSERT (FALSE);
13ae64f3
JJ		 3278 break;
3279
3280 case R_386_TLS_LDM:
142411ca
L		 3281 if (! elf_i386_tls_transition (info, input_bfd,
3282 input_section, contents,
3283 symtab_hdr, sym_hashes,
3284 &r_type, GOT_UNKNOWN, rel,
bedfd056 3285 relend, h, r_symndx, TRUE))
142411ca 3286 return FALSE;
13ae64f3 3287
142411ca
L		 3288 if (r_type != R_386_TLS_LDM)
3289 {
6eaa7fb5
L		 3290 /* LD->LE transition. Change
3291 leal foo@tlsldm(%ebx) %eax
3292 call ___tls_get_addr@PLT
3293 into:
3294 movl %gs:0, %eax
3295 nop
3296 leal 0(%esi,1), %esi
3297 or change
3298 leal foo@tlsldm(%reg) %eax
3299 call *___tls_get_addr@GOT(%reg)
3300 which may be converted to
3301 addr32 call ___tls_get_addr
3302 into:
3303 movl %gs:0, %eax
3304 leal 0(%esi), %esi */
142411ca 3305 BFD_ASSERT (r_type == R_386_TLS_LE_32);
6eaa7fb5
L		 3306 if (*(contents + rel->r_offset + 4) == 0xff
3307 || *(contents + rel->r_offset + 4) == 0x67)
3308 memcpy (contents + rel->r_offset - 2,
3309 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3310 else
3311 memcpy (contents + rel->r_offset - 2,
3312 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 3313 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 3314 rel++;
60f2e42e 3315 wrel++;
13ae64f3
JJ		 3316 continue;
3317 }
3318
6de2ae4a 3319 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 3320 abort ();
3321
0afcef53 3322 off = htab->tls_ld_or_ldm_got.offset;
13ae64f3
JJ		 3323 if (off & 1)
3324 off &= ~1;
3325 else
3326 {
947216bf 3327 Elf_Internal_Rela outrel;
13ae64f3 3328
6de2ae4a 3329 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 3330 abort ();
3331
6de2ae4a
L		 3332 outrel.r_offset = (htab->elf.sgot->output_section->vma
3333 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 3334
3335 bfd_put_32 (output_bfd, 0,
6de2ae4a 3336 htab->elf.sgot->contents + off);
13ae64f3 3337 bfd_put_32 (output_bfd, 0,
6de2ae4a 3338 htab->elf.sgot->contents + off + 4);
13ae64f3 3339 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 3340 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
0afcef53 3341 htab->tls_ld_or_ldm_got.offset |= 1;
13ae64f3 3342 }
6de2ae4a
L		 3343 relocation = htab->elf.sgot->output_section->vma
3344 + htab->elf.sgot->output_offset + off
3345 - htab->elf.sgotplt->output_section->vma
3346 - htab->elf.sgotplt->output_offset;
b34976b6 3347 unresolved_reloc = FALSE;
13ae64f3
JJ		 3348 break;
3349
3350 case R_386_TLS_LDO_32:
0e1862bb
L		 3351 if (!bfd_link_executable (info)
3352 || (input_section->flags & SEC_CODE) == 0)
0afcef53 3353 relocation -= _bfd_x86_elf_dtpoff_base (info);
13ae64f3
JJ		 3354 else
3355 /* When converting LDO to LE, we must negate. */
eb4ff4d6 3356 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3357 break;
3358
3359 case R_386_TLS_LE_32:
13ae64f3 3360 case R_386_TLS_LE:
0e1862bb 3361 if (!bfd_link_executable (info))
37e55690 3362 {
947216bf 3363 Elf_Internal_Rela outrel;
37e55690 3364 asection *sreloc;
37e55690
JJ		 3365
3366 outrel.r_offset = rel->r_offset
3367 + input_section->output_section->vma
3368 + input_section->output_offset;
3369 if (h != NULL && h->dynindx != -1)
3370 indx = h->dynindx;
3371 else
3372 indx = 0;
3373 if (r_type == R_386_TLS_LE_32)
3374 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3375 else
3376 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3377 sreloc = elf_section_data (input_section)->sreloc;
3378 if (sreloc == NULL)
3379 abort ();
59d6ffb2 3380 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 3381 if (indx)
3382 continue;
3383 else if (r_type == R_386_TLS_LE_32)
0afcef53 3384 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
37e55690 3385 else
0afcef53 3386 relocation -= _bfd_x86_elf_dtpoff_base (info);
37e55690
JJ		 3387 }
3388 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 3389 relocation = elf_i386_tpoff (info, relocation);
37e55690 3390 else
eb4ff4d6 3391 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 3392 break;
3393
252b5132
RH		 3394 default:
3395 break;
3396 }
3397
239e1f3a
AM		 3398 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3399 because such sections are not SEC_ALLOC and thus ld.so will
3400 not process them. */
8c694914 3401 if (unresolved_reloc
239e1f3a 3402 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 3403 && h->def_dynamic)
3404 && _bfd_elf_section_offset (output_bfd, info, input_section,
3405 rel->r_offset) != (bfd_vma) -1)
6a30718d 3406 {
4eca0228 3407 _bfd_error_handler
695344c0 3408 /* xgettext:c-format */
2dcf00ce 3409 (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3410 input_bfd,
3411 input_section,
2dcf00ce 3412 (uint64_t) rel->r_offset,
843fe662 3413 howto->name,
6a30718d 3414 h->root.root.string);
b34976b6 3415 return FALSE;
6a30718d 3416 }
83be169b 3417
cbe950e9 3418do_relocation:
252b5132
RH		 3419 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3420 contents, rel->r_offset,
55fd94b0 3421 relocation, 0);
252b5132 3422
62d78908 3423check_relocation_error:
cf5c0c5b 3424 if (r != bfd_reloc_ok)
252b5132 3425 {
cf5c0c5b 3426 const char *name;
ffb2e45b 3427
cf5c0c5b
AM		 3428 if (h != NULL)
3429 name = h->root.root.string;
3430 else
3431 {
3432 name = bfd_elf_string_from_elf_section (input_bfd,
3433 symtab_hdr->sh_link,
3434 sym->st_name);
3435 if (name == NULL)
b34976b6 3436 return FALSE;
cf5c0c5b
AM		 3437 if (*name == '\0')
3438 name = bfd_section_name (input_bfd, sec);
3439 }
ffb2e45b 3440
cf5c0c5b 3441 if (r == bfd_reloc_overflow)
1a72702b
AM		 3442 (*info->callbacks->reloc_overflow)
3443 (info, (h ? &h->root : NULL), name, howto->name,
3444 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
cf5c0c5b
AM		 3445 else
3446 {
4eca0228 3447 _bfd_error_handler
695344c0 3448 /* xgettext:c-format */
2dcf00ce 3449 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
d003868e 3450 input_bfd, input_section,
2dcf00ce 3451 (uint64_t) rel->r_offset, name, (int) r);
b34976b6 3452 return FALSE;
cf5c0c5b 3453 }
252b5132 3454 }
60f2e42e
L		 3455
3456 if (wrel != rel)
3457 *wrel = *rel;
3458 }
3459
3460 if (wrel != rel)
3461 {
3462 Elf_Internal_Shdr *rel_hdr;
3463 size_t deleted = rel - wrel;
3464
3465 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3466 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3467 if (rel_hdr->sh_size == 0)
3468 {
3469 /* It is too late to remove an empty reloc section. Leave
3470 one NONE reloc.
3471 ??? What is wrong with an empty section??? */
3472 rel_hdr->sh_size = rel_hdr->sh_entsize;
3473 deleted -= 1;
3474 }
3475 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3476 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3477 input_section->reloc_count -= deleted;
252b5132
RH		 3478 }
3479
b34976b6 3480 return TRUE;
252b5132
RH		 3481}
3482
3483/* Finish up dynamic symbol handling. We set the contents of various
3484 dynamic sections here. */
3485
b34976b6 3486static bfd_boolean
55fd94b0
AM		 3487elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3488 struct bfd_link_info *info,
3489 struct elf_link_hash_entry *h,
3490 Elf_Internal_Sym *sym)
252b5132 3491{
0afcef53 3492 struct elf_x86_link_hash_table *htab;
25e762b9 3493 unsigned plt_entry_size;
0afcef53 3494 struct elf_x86_link_hash_entry *eh;
aec6b87e 3495 bfd_boolean local_undefweak;
ee2fdd6f 3496 bfd_boolean use_plt_second;
252b5132 3497
0afcef53 3498 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4dfe6ac6
NC		 3499 if (htab == NULL)
3500 return FALSE;
252b5132 3501
765e526c 3502 plt_entry_size = htab->plt.plt_entry_size;
25e762b9 3503
ee2fdd6f
L		 3504 /* Use the second PLT section only if there is .plt section. */
3505 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3506
0afcef53 3507 eh = (struct elf_x86_link_hash_entry *) h;
e133d005
L		 3508 if (eh->no_finish_dynamic_symbol)
3509 abort ();
dd7e64d4 3510
aec6b87e
L		 3511 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3512 resolved undefined weak symbols in executable so that their
3513 references have value 0 at run-time. */
c5bce5c6 3514 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
aec6b87e 3515
252b5132
RH		 3516 if (h->plt.offset != (bfd_vma) -1)
3517 {
ee2fdd6f 3518 bfd_vma plt_index, plt_offset;
252b5132 3519 bfd_vma got_offset;
947216bf
AM		 3520 Elf_Internal_Rela rel;
3521 bfd_byte *loc;
ee2fdd6f 3522 asection *plt, *resolved_plt, *gotplt, *relplt;
cbe950e9
L		 3523
3524 /* When building a static executable, use .iplt, .igot.plt and
3525 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 3526 if (htab->elf.splt != NULL)
cbe950e9 3527 {
6de2ae4a
L		 3528 plt = htab->elf.splt;
3529 gotplt = htab->elf.sgotplt;
3530 relplt = htab->elf.srelplt;
cbe950e9
L		 3531 }
3532 else
3533 {
6de2ae4a
L		 3534 plt = htab->elf.iplt;
3535 gotplt = htab->elf.igotplt;
3536 relplt = htab->elf.irelplt;
cbe950e9 3537 }
252b5132 3538
f3180fa9 3539 VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
252b5132
RH		 3540
3541 /* Get the index in the procedure linkage table which
3542 corresponds to this symbol. This is the index of this symbol
3543 in all the symbols for which we are making plt entries. The
cbe950e9 3544 first entry in the procedure linkage table is reserved.
252b5132 3545
cbe950e9 3546 Get the offset into the .got table of the entry that
252b5132 3547 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 3548 The first three are reserved.
6bbec505 3549
cbe950e9
L		 3550 For static executables, we don't reserve anything. */
3551
6de2ae4a 3552 if (plt == htab->elf.splt)
cbe950e9 3553 {
f604c2a2 3554 got_offset = (h->plt.offset / plt_entry_size
765e526c 3555 - htab->plt.has_plt0);
e1f98742 3556 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 3557 }
3558 else
3559 {
e1f98742
L		 3560 got_offset = h->plt.offset / plt_entry_size;
3561 got_offset = got_offset * 4;
cbe950e9 3562 }
252b5132 3563
f604c2a2
L		 3564 /* Fill in the entry in the procedure linkage table and update
3565 the first slot. */
765e526c 3566 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
f604c2a2 3567 plt_entry_size);
ee2fdd6f
L		 3568
3569 if (use_plt_second)
3570 {
3571 const bfd_byte *plt_entry;
3572 if (bfd_link_pic (info))
765e526c 3573 plt_entry = htab->non_lazy_plt->pic_plt_entry;
ee2fdd6f 3574 else
765e526c 3575 plt_entry = htab->non_lazy_plt->plt_entry;
ee2fdd6f 3576 memcpy (htab->plt_second->contents + eh->plt_second.offset,
765e526c 3577 plt_entry, htab->non_lazy_plt->plt_entry_size);
ee2fdd6f
L		 3578
3579 resolved_plt = htab->plt_second;
3580 plt_offset = eh->plt_second.offset;
3581 }
3582 else
3583 {
3584 resolved_plt = plt;
3585 plt_offset = h->plt.offset;
3586 }
3587
0e1862bb 3588 if (! bfd_link_pic (info))
252b5132 3589 {
252b5132 3590 bfd_put_32 (output_bfd,
cbe950e9
L		 3591 (gotplt->output_section->vma
3592 + gotplt->output_offset
252b5132 3593 + got_offset),
ee2fdd6f 3594 resolved_plt->contents + plt_offset
07d6d2b8 3595 + htab->plt.plt_got_offset);
eac338cf 3596
851b6fa1 3597 if (htab->target_os == is_vxworks)
eac338cf
PB		 3598 {
3599 int s, k, reloc_index;
3600
3601 /* Create the R_386_32 relocation referencing the GOT
3602 for this PLT entry. */
3603
3604 /* S: Current slot number (zero-based). */
765e526c 3605 s = ((h->plt.offset - htab->plt.plt_entry_size)
07d6d2b8 3606 / htab->plt.plt_entry_size);
eac338cf 3607 /* K: Number of relocations for PLTResolve. */
0e1862bb 3608 if (bfd_link_pic (info))
eac338cf
PB		 3609 k = PLTRESOLVE_RELOCS_SHLIB;
3610 else
3611 k = PLTRESOLVE_RELOCS;
3612 /* Skip the PLTresolve relocations, and the relocations for
3613 the other PLT slots. */
3614 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
765e526c 3615 loc = (htab->srelplt2->contents + reloc_index
eac338cf
PB		 3616 * sizeof (Elf32_External_Rel));
3617
ee2fdd6f
L		 3618 rel.r_offset = (plt->output_section->vma
3619 + plt->output_offset
eac338cf 3620 + h->plt.offset + 2),
7325306f 3621 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3622 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3623
3624 /* Create the R_386_32 relocation referencing the beginning of
3625 the PLT for this GOT entry. */
6de2ae4a
L		 3626 rel.r_offset = (htab->elf.sgotplt->output_section->vma
3627 + htab->elf.sgotplt->output_offset
eac338cf 3628 + got_offset);
7325306f 3629 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 3630 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 3631 loc + sizeof (Elf32_External_Rel));
eac338cf 3632 }
252b5132
RH		 3633 }
3634 else
3635 {
252b5132 3636 bfd_put_32 (output_bfd, got_offset,
ee2fdd6f 3637 resolved_plt->contents + plt_offset
07d6d2b8 3638 + htab->plt.plt_got_offset);
252b5132
RH		 3639 }
3640
aec6b87e
L		 3641 /* Fill in the entry in the global offset table. Leave the entry
3642 as zero for undefined weak symbol in PIE. No PLT relocation
3643 against undefined weak symbol in PIE. */
3644 if (!local_undefweak)
cbe950e9 3645 {
765e526c 3646 if (htab->plt.has_plt0)
f604c2a2
L		 3647 bfd_put_32 (output_bfd,
3648 (plt->output_section->vma
3649 + plt->output_offset
3650 + h->plt.offset
765e526c 3651 + htab->lazy_plt->plt_lazy_offset),
f604c2a2 3652 gotplt->contents + got_offset);
252b5132 3653
aec6b87e
L		 3654 /* Fill in the entry in the .rel.plt section. */
3655 rel.r_offset = (gotplt->output_section->vma
3656 + gotplt->output_offset
3657 + got_offset);
cf1070f1 3658 if (PLT_LOCAL_IFUNC_P (info, h))
aec6b87e 3659 {
871b3ab2 3660 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 3661 h->root.root.string,
3662 h->root.u.def.section->owner);
3663
aec6b87e
L		 3664 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3665 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3666 in the .got.plt section. */
3667 bfd_put_32 (output_bfd,
3668 (h->root.u.def.value
3669 + h->root.u.def.section->output_section->vma
3670 + h->root.u.def.section->output_offset),
3671 gotplt->contents + got_offset);
3672 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3673 /* R_386_IRELATIVE comes last. */
3674 plt_index = htab->next_irelative_index--;
3675 }
3676 else
3677 {
3678 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3679 plt_index = htab->next_jump_slot_index++;
3680 }
3681
3682 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3683 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3684
f604c2a2
L		 3685 /* Don't fill the second and third slots in PLT entry for
3686 static executables nor without PLT0. */
765e526c 3687 if (plt == htab->elf.splt && htab->plt.has_plt0)
aec6b87e
L		 3688 {
3689 bfd_put_32 (output_bfd,
3690 plt_index * sizeof (Elf32_External_Rel),
3691 plt->contents + h->plt.offset
765e526c 3692 + htab->lazy_plt->plt_reloc_offset);
f604c2a2
L		 3693 bfd_put_32 (output_bfd,
3694 - (h->plt.offset
765e526c 3695 + htab->lazy_plt->plt_plt_offset + 4),
f604c2a2 3696 (plt->contents + h->plt.offset
765e526c 3697 + htab->lazy_plt->plt_plt_offset));
aec6b87e 3698 }
e1f98742 3699 }
dd7e64d4
L		 3700 }
3701 else if (eh->plt_got.offset != (bfd_vma) -1)
3702 {
3703 bfd_vma got_offset, plt_offset;
3704 asection *plt, *got, *gotplt;
3705 const bfd_byte *got_plt_entry;
3706
dd7e64d4
L		 3707 /* Set the entry in the GOT procedure linkage table. */
3708 plt = htab->plt_got;
3709 got = htab->elf.sgot;
3710 gotplt = htab->elf.sgotplt;
3711 got_offset = h->got.offset;
3712
3713 if (got_offset == (bfd_vma) -1
3714 || plt == NULL
3715 || got == NULL
3716 || gotplt == NULL)
3717 abort ();
3718
3719 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 3720 if (! bfd_link_pic (info))
252b5132 3721 {
765e526c 3722 got_plt_entry = htab->non_lazy_plt->plt_entry;
dd7e64d4 3723 got_offset += got->output_section->vma + got->output_offset;
252b5132 3724 }
dd7e64d4
L		 3725 else
3726 {
765e526c 3727 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
dd7e64d4
L		 3728 got_offset += (got->output_section->vma
3729 + got->output_offset
3730 - gotplt->output_section->vma
3731 - gotplt->output_offset);
3732 }
3733
3734 plt_offset = eh->plt_got.offset;
3735 memcpy (plt->contents + plt_offset, got_plt_entry,
765e526c 3736 htab->non_lazy_plt->plt_entry_size);
dd7e64d4 3737 bfd_put_32 (output_bfd, got_offset,
f604c2a2 3738 (plt->contents + plt_offset
765e526c 3739 + htab->non_lazy_plt->plt_got_offset));
dd7e64d4
L		 3740 }
3741
aec6b87e
L		 3742 if (!local_undefweak
3743 && !h->def_regular
dd7e64d4
L		 3744 && (h->plt.offset != (bfd_vma) -1
3745 || eh->plt_got.offset != (bfd_vma) -1))
3746 {
3747 /* Mark the symbol as undefined, rather than as defined in
3748 the .plt section. Leave the value if there were any
3749 relocations where pointer equality matters (this is a clue
3750 for the dynamic linker, to make function pointer
3751 comparisons work between an application and shared
3752 library), otherwise set it to zero. If a function is only
3753 called from a binary, there is no need to slow down
3754 shared libraries because of that. */
3755 sym->st_shndx = SHN_UNDEF;
3756 if (!h->pointer_equality_needed)
3757 sym->st_value = 0;
252b5132
RH		 3758 }
3759
4ec09950
L		 3760 _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym);
3761
aec6b87e
L		 3762 /* Don't generate dynamic GOT relocation against undefined weak
3763 symbol in executable. */
13ae64f3 3764 if (h->got.offset != (bfd_vma) -1
0afcef53
L		 3765 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3766 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
aec6b87e 3767 && !local_undefweak)
252b5132 3768 {
947216bf 3769 Elf_Internal_Rela rel;
233cc9c1 3770 asection *relgot = htab->elf.srelgot;
252b5132
RH		 3771
3772 /* This symbol has an entry in the global offset table. Set it
3773 up. */
3774
6de2ae4a 3775 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 3776 abort ();
252b5132 3777
6de2ae4a
L		 3778 rel.r_offset = (htab->elf.sgot->output_section->vma
3779 + htab->elf.sgot->output_offset
dc810e39 3780 + (h->got.offset & ~(bfd_vma) 1));
252b5132 3781
dd5724d5
AM		 3782 /* If this is a static link, or it is a -Bsymbolic link and the
3783 symbol is defined locally or was forced to be local because
3784 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 3785 The entry in the global offset table will already have been
3786 initialized in the relocate_section function. */
710ab287 3787 if (h->def_regular
0018b0a3
L		 3788 && h->type == STT_GNU_IFUNC)
3789 {
233cc9c1
L		 3790 if (h->plt.offset == (bfd_vma) -1)
3791 {
3792 /* STT_GNU_IFUNC is referenced without PLT. */
3793 if (htab->elf.splt == NULL)
3794 {
3795 /* use .rel[a].iplt section to store .got relocations
3796 in static executable. */
3797 relgot = htab->elf.irelplt;
3798 }
6999821f 3799 if (SYMBOL_REFERENCES_LOCAL_P (info, h))
233cc9c1 3800 {
871b3ab2 3801 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
6322e5c5
L		 3802 h->root.root.string,
3803 h->root.u.def.section->owner);
3804
233cc9c1
L		 3805 bfd_put_32 (output_bfd,
3806 (h->root.u.def.value
3807 + h->root.u.def.section->output_section->vma
3808 + h->root.u.def.section->output_offset),
3809 htab->elf.sgot->contents + h->got.offset);
3810 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3811 }
3812 else
3813 goto do_glob_dat;
3814 }
3815 else if (bfd_link_pic (info))
710ab287
L		 3816 {
3817 /* Generate R_386_GLOB_DAT. */
3818 goto do_glob_dat;
3819 }
3820 else
3821 {
cd2b2c10 3822 asection *plt;
ee2fdd6f 3823 bfd_vma plt_offset;
cd2b2c10 3824
710ab287
L		 3825 if (!h->pointer_equality_needed)
3826 abort ();
3827
3828 /* For non-shared object, we can't use .got.plt, which
3829 contains the real function addres if we need pointer
3830 equality. We load the GOT entry with the PLT entry. */
ee2fdd6f
L		 3831 if (htab->plt_second != NULL)
3832 {
3833 plt = htab->plt_second;
3834 plt_offset = eh->plt_second.offset;
3835 }
3836 else
3837 {
3838 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3839 plt_offset = h->plt.offset;
3840 }
710ab287
L		 3841 bfd_put_32 (output_bfd,
3842 (plt->output_section->vma
ee2fdd6f 3843 + plt->output_offset + plt_offset),
6de2ae4a 3844 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 3845 return TRUE;
3846 }
0018b0a3 3847 }
0e1862bb 3848 else if (bfd_link_pic (info)
6999821f 3849 && SYMBOL_REFERENCES_LOCAL_P (info, h))
dd5724d5 3850 {
6725bdbf 3851 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 3852 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3853 }
252b5132
RH		 3854 else
3855 {
dd5724d5 3856 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 3857do_glob_dat:
6725bdbf 3858 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 3859 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 3860 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3861 }
3862
233cc9c1 3863 elf_append_rel (output_bfd, relgot, &rel);
252b5132
RH		 3864 }
3865
f5385ebf 3866 if (h->needs_copy)
252b5132 3867 {
947216bf 3868 Elf_Internal_Rela rel;
5474d94f 3869 asection *s;
252b5132
RH		 3870
3871 /* This symbol needs a copy reloc. Set it up. */
ff38b4cc 3872 VERIFY_COPY_RELOC (h, htab)
252b5132
RH		 3873
3874 rel.r_offset = (h->root.u.def.value
3875 + h->root.u.def.section->output_section->vma
3876 + h->root.u.def.section->output_offset);
3877 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
afbf7e8e 3878 if (h->root.u.def.section == htab->elf.sdynrelro)
5474d94f
AM		 3879 s = htab->elf.sreldynrelro;
3880 else
3881 s = htab->elf.srelbss;
3882 elf_append_rel (output_bfd, s, &rel);
252b5132
RH		 3883 }
3884
b34976b6 3885 return TRUE;
252b5132
RH		 3886}
3887
c25bc9fc
L		 3888/* Finish up local dynamic symbol handling. We set the contents of
3889 various dynamic sections here. */
3890
3891static bfd_boolean
3892elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
3893{
3894 struct elf_link_hash_entry *h
3895 = (struct elf_link_hash_entry *) *slot;
3896 struct bfd_link_info *info
23209a78 3897 = (struct bfd_link_info *) inf;
c25bc9fc
L		 3898
3899 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
3900 h, NULL);
3901}
3902
aec6b87e
L		 3903/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
3904 here since undefined weak symbol may not be dynamic and may not be
3905 called for elf_i386_finish_dynamic_symbol. */
3906
3907static bfd_boolean
3908elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
3909 void *inf)
3910{
3911 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
3912 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3913
3914 if (h->root.type != bfd_link_hash_undefweak
3915 || h->dynindx != -1)
3916 return TRUE;
3917
3918 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5f0f0847 3919 info, h, NULL);
aec6b87e
L		 3920}
3921
38701953
AM		 3922/* Used to decide how to sort relocs in an optimal manner for the
3923 dynamic linker, before writing them out. */
3924
3925static enum elf_reloc_type_class
cae1fbbb 3926elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 3927 const asection *rel_sec ATTRIBUTE_UNUSED,
3928 const Elf_Internal_Rela *rela)
38701953 3929{
cae1fbbb
L		 3930 bfd *abfd = info->output_bfd;
3931 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3932 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 3933
d9e3b590
L		 3934 if (htab->dynsym != NULL
3935 && htab->dynsym->contents != NULL)
3936 {
3937 /* Check relocation against STT_GNU_IFUNC symbol if there are
07d6d2b8 3938 dynamic symbols. */
d9e3b590 3939 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
c428ce9d
L		 3940 if (r_symndx != STN_UNDEF)
3941 {
3942 Elf_Internal_Sym sym;
3943 if (!bed->s->swap_symbol_in (abfd,
3944 (htab->dynsym->contents
3945 + r_symndx * sizeof (Elf32_External_Sym)),
3946 0, &sym))
3947 abort ();
d9e3b590 3948
c428ce9d
L		 3949 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3950 return reloc_class_ifunc;
3951 }
d9e3b590 3952 }
cae1fbbb 3953
55fd94b0 3954 switch (ELF32_R_TYPE (rela->r_info))
38701953 3955 {
c428ce9d
L		 3956 case R_386_IRELATIVE:
3957 return reloc_class_ifunc;
38701953
AM		 3958 case R_386_RELATIVE:
3959 return reloc_class_relative;
3960 case R_386_JUMP_SLOT:
3961 return reloc_class_plt;
3962 case R_386_COPY:
3963 return reloc_class_copy;
3964 default:
3965 return reloc_class_normal;
3966 }
3967}
3968
252b5132
RH		 3969/* Finish up the dynamic sections. */
3970
b34976b6 3971static bfd_boolean
55fd94b0
AM		 3972elf_i386_finish_dynamic_sections (bfd *output_bfd,
3973 struct bfd_link_info *info)
252b5132 3974{
0afcef53 3975 struct elf_x86_link_hash_table *htab;
252b5132 3976
9577f60b 3977 htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
4dfe6ac6
NC		 3978 if (htab == NULL)
3979 return FALSE;
3980
9577f60b
L		 3981 if (!htab->elf.dynamic_sections_created)
3982 return TRUE;
252b5132 3983
9577f60b 3984 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 3985 {
9577f60b
L		 3986 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3987 really seem like the right value. */
3988 elf_section_data (htab->elf.splt->output_section)
3989 ->this_hdr.sh_entsize = 4;
252b5132 3990
9577f60b 3991 if (htab->plt.has_plt0)
252b5132 3992 {
9577f60b
L		 3993 /* Fill in the special first entry in the procedure linkage
3994 table. */
9577f60b
L		 3995 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
3996 htab->lazy_plt->plt0_entry_size);
3997 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
851b6fa1 3998 htab->plt0_pad_byte,
9577f60b
L		 3999 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
4000 if (!bfd_link_pic (info))
252b5132 4001 {
9577f60b
L		 4002 bfd_put_32 (output_bfd,
4003 (htab->elf.sgotplt->output_section->vma
4004 + htab->elf.sgotplt->output_offset
4005 + 4),
4006 htab->elf.splt->contents
4007 + htab->lazy_plt->plt0_got1_offset);
4008 bfd_put_32 (output_bfd,
4009 (htab->elf.sgotplt->output_section->vma
4010 + htab->elf.sgotplt->output_offset
4011 + 8),
4012 htab->elf.splt->contents
4013 + htab->lazy_plt->plt0_got2_offset);
1f78f649 4014
851b6fa1 4015 if (htab->target_os == is_vxworks)
eac338cf 4016 {
9577f60b
L		 4017 Elf_Internal_Rela rel;
4018 int num_plts = (htab->elf.splt->size
4019 / htab->plt.plt_entry_size) - 1;
4020 unsigned char *p;
4021 asection *srelplt2 = htab->srelplt2;
4022
4023 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4024 + 4. On IA32 we use REL relocations so the
4025 addend goes in the PLT directly. */
4026 rel.r_offset = (htab->elf.splt->output_section->vma
4027 + htab->elf.splt->output_offset
4028 + htab->lazy_plt->plt0_got1_offset);
4029 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4030 R_386_32);
4031 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4032 srelplt2->contents);
4033 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4034 + 8. */
4035 rel.r_offset = (htab->elf.splt->output_section->vma
4036 + htab->elf.splt->output_offset
4037 + htab->lazy_plt->plt0_got2_offset);
4038 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4039 R_386_32);
4040 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4041 srelplt2->contents +
4042 sizeof (Elf32_External_Rel));
4043 /* Correct the .rel.plt.unloaded relocations. */
4044 p = srelplt2->contents;
4045 if (bfd_link_pic (info))
4046 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4047 else
4048 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
eac338cf 4049
9577f60b 4050 for (; num_plts; num_plts--)
1f78f649 4051 {
9577f60b 4052 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
f604c2a2 4053 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
1f78f649 4054 R_386_32);
9577f60b
L		 4055 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4056 p += sizeof (Elf32_External_Rel);
f604c2a2 4057
9577f60b
L		 4058 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4059 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4060 R_386_32);
4061 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4062 p += sizeof (Elf32_External_Rel);
1f78f649 4063 }
eac338cf
PB		 4064 }
4065 }
252b5132 4066 }
fff53dae
L		 4067 }
4068
aec6b87e
L		 4069 /* Fill PLT entries for undefined weak symbols in PIE. */
4070 if (bfd_link_pie (info))
4071 bfd_hash_traverse (&info->hash->table,
4072 elf_i386_pie_finish_undefweak_symbol,
4073 info);
4074
b34976b6 4075 return TRUE;
252b5132
RH		 4076}
4077
233cc9c1
L		 4078/* Fill PLT/GOT entries and allocate dynamic relocations for local
4079 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4080 It has to be done before elf_link_sort_relocs is called so that
4081 dynamic relocations are properly sorted. */
4082
4083static bfd_boolean
4084elf_i386_output_arch_local_syms
4085 (bfd *output_bfd ATTRIBUTE_UNUSED,
4086 struct bfd_link_info *info,
4087 void *flaginfo ATTRIBUTE_UNUSED,
4088 int (*func) (void *, const char *,
4089 Elf_Internal_Sym *,
4090 asection *,
4091 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4092{
0afcef53
L		 4093 struct elf_x86_link_hash_table *htab
4094 = elf_x86_hash_table (info, I386_ELF_DATA);
233cc9c1
L		 4095 if (htab == NULL)
4096 return FALSE;
4097
4098 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4099 htab_traverse (htab->loc_hash_table,
4100 elf_i386_finish_local_dynamic_symbol,
4101 info);
4102
4103 return TRUE;
4104}
4105
f604c2a2 4106/* Forward declaration. */
765e526c 4107static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
f604c2a2
L		 4108
4109/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4110 dynamic relocations. */
4111
4112static long
4113elf_i386_get_synthetic_symtab (bfd *abfd,
4114 long symcount ATTRIBUTE_UNUSED,
4115 asymbol **syms ATTRIBUTE_UNUSED,
4116 long dynsymcount,
4117 asymbol **dynsyms,
4118 asymbol **ret)
4119{
f493882d 4120 long count, i, n;
f604c2a2 4121 int j;
f604c2a2 4122 bfd_byte *plt_contents;
f493882d 4123 long relsize;
765e526c
L		 4124 const struct elf_x86_lazy_plt_layout *lazy_plt;
4125 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4126 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4127 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
f604c2a2
L		 4128 asection *plt;
4129 bfd_vma got_addr;
f493882d
L		 4130 enum elf_x86_plt_type plt_type;
4131 struct elf_x86_plt plts[] =
3972882e 4132 {
f493882d
L		 4133 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4134 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4135 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4136 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
f604c2a2 4137 };
144bed8d 4138
f604c2a2 4139 *ret = NULL;
144bed8d 4140
f604c2a2
L		 4141 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4142 return 0;
3972882e 4143
f604c2a2
L		 4144 if (dynsymcount <= 0)
4145 return 0;
cca5b8b6 4146
f604c2a2
L		 4147 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4148 if (relsize <= 0)
4149 return -1;
cca5b8b6 4150
f604c2a2
L		 4151 non_lazy_plt = NULL;
4152 /* Silence GCC 6. */
4153 lazy_plt = NULL;
ee2fdd6f
L		 4154 non_lazy_ibt_plt = NULL;
4155 lazy_ibt_plt = NULL;
851b6fa1 4156 switch (get_elf_x86_backend_data (abfd)->target_os)
144bed8d 4157 {
f604c2a2 4158 case is_normal:
3b4c3844 4159 case is_solaris:
f604c2a2 4160 non_lazy_plt = &elf_i386_non_lazy_plt;
ee2fdd6f
L		 4161 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4162 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 4163 /* Fall through */
4164 case is_vxworks:
4165 lazy_plt = &elf_i386_lazy_plt;
4166 break;
4167 case is_nacl:
4168 lazy_plt = &elf_i386_nacl_plt;
4169 break;
4170 }
4171
4172 got_addr = 0;
3972882e 4173
f604c2a2
L		 4174 count = 0;
4175 for (j = 0; plts[j].name != NULL; j++)
4176 {
4177 plt = bfd_get_section_by_name (abfd, plts[j].name);
90efb642 4178 if (plt == NULL || plt->size == 0)
6f25f223 4179 continue;
533d0af0 4180
f604c2a2
L		 4181 /* Get the PLT section contents. */
4182 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4183 if (plt_contents == NULL)
4184 break;
4185 if (!bfd_get_section_contents (abfd, (asection *) plt,
4186 plt_contents, 0, plt->size))
4187 {
4188 free (plt_contents);
4189 break;
4190 }
4191
4192 /* Check what kind of PLT it is. */
4193 plt_type = plt_unknown;
90efb642
L		 4194 if (plts[j].type == plt_unknown
4195 && (plt->size >= (lazy_plt->plt0_entry_size
4196 + lazy_plt->plt_entry_size)))
f604c2a2
L		 4197 {
4198 /* Match lazy PLT first. */
4199 if (memcmp (plt_contents, lazy_plt->plt0_entry,
4200 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4201 {
4202 /* The fist entry in the lazy IBT PLT is the same as the
4203 normal lazy PLT. */
4204 if (lazy_ibt_plt != NULL
90efb642 4205 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4206 lazy_ibt_plt->plt_entry,
4207 lazy_ibt_plt->plt_got_offset) == 0))
4208 plt_type = plt_lazy | plt_second;
4209 else
4210 plt_type = plt_lazy;
4211 }
f604c2a2
L		 4212 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4213 lazy_plt->plt0_got1_offset) == 0)
ee2fdd6f
L		 4214 {
4215 /* The fist entry in the PIC lazy IBT PLT is the same as
4216 the normal PIC lazy PLT. */
4217 if (lazy_ibt_plt != NULL
90efb642 4218 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
ee2fdd6f
L		 4219 lazy_ibt_plt->pic_plt_entry,
4220 lazy_ibt_plt->plt_got_offset) == 0))
4221 plt_type = plt_lazy | plt_pic | plt_second;
4222 else
4223 plt_type = plt_lazy | plt_pic;
4224 }
f604c2a2
L		 4225 }
4226
4227 if (non_lazy_plt != NULL
90efb642
L		 4228 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4229 && plt->size >= non_lazy_plt->plt_entry_size)
f604c2a2
L		 4230 {
4231 /* Match non-lazy PLT. */
4232 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4233 non_lazy_plt->plt_got_offset) == 0)
4234 plt_type = plt_non_lazy;
4235 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4236 non_lazy_plt->plt_got_offset) == 0)
4237 plt_type = plt_pic;
4238 }
4239
ee2fdd6f 4240 if ((non_lazy_ibt_plt != NULL)
90efb642
L		 4241 && (plt_type == plt_unknown || plt_type == plt_second)
4242 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
ee2fdd6f
L		 4243 {
4244 if (memcmp (plt_contents,
4245 non_lazy_ibt_plt->plt_entry,
4246 non_lazy_ibt_plt->plt_got_offset) == 0)
4247 {
4248 /* Match IBT PLT. */
4249 plt_type = plt_second;
4250 non_lazy_plt = non_lazy_ibt_plt;
4251 }
4252 else if (memcmp (plt_contents,
4253 non_lazy_ibt_plt->pic_plt_entry,
4254 non_lazy_ibt_plt->plt_got_offset) == 0)
4255 {
4256 /* Match PIC IBT PLT. */
4257 plt_type = plt_second | plt_pic;
4258 non_lazy_plt = non_lazy_ibt_plt;
4259 }
4260 }
4261
f604c2a2 4262 if (plt_type == plt_unknown)
37c0b6ee
L		 4263 {
4264 free (plt_contents);
4265 continue;
4266 }
3972882e 4267
f604c2a2
L		 4268 plts[j].sec = plt;
4269 plts[j].type = plt_type;
ec1f73bb 4270
f604c2a2
L		 4271 if ((plt_type & plt_lazy))
4272 {
4273 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4274 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4275 /* Skip PLT0 in lazy PLT. */
4276 i = 1;
4277 }
4278 else
4279 {
4280 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4281 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4282 i = 0;
4283 }
fca6ae69 4284
ee2fdd6f
L		 4285 /* Skip lazy PLT when the second PLT is used. */
4286 if ((plt_type & (plt_lazy | plt_second))
4287 == (plt_lazy | plt_second))
4288 plts[j].count = 0;
4289 else
4290 {
4291 n = plt->size / plts[j].plt_entry_size;
4292 plts[j].count = n;
4293 count += n - i;
4294 }
f604c2a2
L		 4295
4296 plts[j].contents = plt_contents;
4297
4298 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4299 if ((plt_type & plt_pic))
4300 got_addr = (bfd_vma) -1;
144bed8d
L		 4301 }
4302
f493882d
L		 4303 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4304 got_addr, plts, dynsyms,
4305 ret);
4c45e5c9
JJ		 4306}
4307
f604c2a2
L		 4308/* Set up i386 GNU properties. Return the first relocatable ELF input
4309 with GNU properties if found. Otherwise, return NULL. */
4310
4311static bfd *
4312elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4313{
1de031c8 4314 struct elf_x86_init_table init_table;
f604c2a2 4315
851b6fa1 4316 switch (get_elf_x86_backend_data (info->output_bfd)->target_os)
f604c2a2
L		 4317 {
4318 case is_normal:
3b4c3844 4319 case is_solaris:
851b6fa1 4320 init_table.plt0_pad_byte = 0x0;
1de031c8
L		 4321 init_table.lazy_plt = &elf_i386_lazy_plt;
4322 init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4323 init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4324 init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
f604c2a2
L		 4325 break;
4326 case is_vxworks:
851b6fa1 4327 init_table.plt0_pad_byte = 0x90;
1de031c8
L		 4328 init_table.lazy_plt = &elf_i386_lazy_plt;
4329 init_table.non_lazy_plt = NULL;
4330 init_table.lazy_ibt_plt = NULL;
4331 init_table.non_lazy_ibt_plt = NULL;
f604c2a2
L		 4332 break;
4333 case is_nacl:
851b6fa1 4334 init_table.plt0_pad_byte = 0x90;
1de031c8
L		 4335 init_table.lazy_plt = &elf_i386_nacl_plt;
4336 init_table.non_lazy_plt = NULL;
4337 init_table.lazy_ibt_plt = NULL;
4338 init_table.non_lazy_ibt_plt = NULL;
f604c2a2
L		 4339 break;
4340 }
4341
1de031c8
L		 4342 init_table.r_info = elf32_r_info;
4343 init_table.r_sym = elf32_r_sym;
7a382c1c 4344
1de031c8 4345 return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
f604c2a2
L		 4346}
4347
6d00b590 4348#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 4349#define TARGET_LITTLE_NAME "elf32-i386"
4350#define ELF_ARCH bfd_arch_i386
ae95ffa6 4351#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 4352#define ELF_MACHINE_CODE EM_386
4353#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 4354
4355#define elf_backend_can_gc_sections 1
51b64d56 4356#define elf_backend_can_refcount 1
252b5132
RH		 4357#define elf_backend_want_got_plt 1
4358#define elf_backend_plt_readonly 1
4359#define elf_backend_want_plt_sym 0
4360#define elf_backend_got_header_size 12
e41b3a13 4361#define elf_backend_plt_alignment 4
64f52338 4362#define elf_backend_dtrel_excludes_plt 1
f7483970 4363#define elf_backend_extern_protected_data 1
bedfd056 4364#define elf_backend_caches_rawsize 1
5474d94f 4365#define elf_backend_want_dynrelro 1
252b5132 4366
8c29f035
AM		 4367/* Support RELA for objdump of prelink objects. */
4368#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 4369#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4370
dd5724d5 4371#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
dd5724d5 4372#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 4373#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 4374#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5 4375
13285a1b 4376#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 4377#define elf_backend_check_relocs elf_i386_check_relocs
f604c2a2 4378#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
0ac8d2ca 4379#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 4380#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4381#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
233cc9c1 4382#define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
c5fccbec
DJ		 4383#define elf_backend_grok_prstatus elf_i386_grok_prstatus
4384#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 4385#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca 4386#define elf_backend_relocate_section elf_i386_relocate_section
f604c2a2 4387#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
9f857535 4388#define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
dd5724d5 4389
a2f63b2e
MR		 4390#define elf_backend_linux_prpsinfo32_ugid16 TRUE
4391
8f56f7a2
L		 4392#define elf32_bed elf32_i386_bed
4393
252b5132 4394#include "elf32-target.h"
2bc3c89a
AM		 4395
4396/* FreeBSD support. */
4397
4398#undef TARGET_LITTLE_SYM
6d00b590 4399#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 4400#undef TARGET_LITTLE_NAME
4401#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 4402#undef ELF_OSABI
4403#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 4404
4405/* The kernel recognizes executables as valid only if they carry a
4406 "FreeBSD" label in the ELF header. So we put this label on all
4407 executables and (for simplicity) also all other object files. */
4408
2bc3c89a 4409static void
d8045f23 4410elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 4411{
78245035 4412 _bfd_elf_post_process_headers (abfd, info);
2bc3c89a 4413
2bc3c89a 4414#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 4415 {
4416 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4417 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4418 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4419 }
caf47ea6 4420#endif
2bc3c89a
AM		 4421}
4422
4423#undef elf_backend_post_process_headers
d8045f23 4424#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC		 4425#undef elf32_bed
4426#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 4427
d8045f23
NC		 4428#undef elf_backend_add_symbol_hook
4429
2bc3c89a 4430#include "elf32-target.h"
eac338cf 4431
a6cc6b3b
RO		 4432/* Solaris 2. */
4433
4434#undef TARGET_LITTLE_SYM
6d00b590 4435#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO		 4436#undef TARGET_LITTLE_NAME
4437#define TARGET_LITTLE_NAME "elf32-i386-sol2"
4438
3b4c3844
L		 4439static const struct elf_x86_backend_data elf_i386_solaris_arch_bed =
4440 {
4441 is_solaris /* os */
4442 };
4443
4444#undef elf_backend_arch_data
4445#define elf_backend_arch_data &elf_i386_solaris_arch_bed
4446
914082d1
L		 4447#undef elf_backend_post_process_headers
4448
a6cc6b3b
RO		 4449/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4450 objects won't be recognized. */
4451#undef ELF_OSABI
4452
4453#undef elf32_bed
4454#define elf32_bed elf32_i386_sol2_bed
4455
7dc98aea
RO		 4456/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4457 boundary. */
84865015 4458#undef elf_backend_static_tls_alignment
7dc98aea
RO		 4459#define elf_backend_static_tls_alignment 8
4460
a6cc6b3b
RO		 4461/* The Solaris 2 ABI requires a plt symbol on all platforms.
4462
4463 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4464 File, p.63. */
84865015 4465#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 4466#define elf_backend_want_plt_sym 1
4467
84865015
NC		 4468#undef elf_backend_strtab_flags
4469#define elf_backend_strtab_flags SHF_STRINGS
4470
5522f910 4471/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
07d6d2b8 4472 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5522f910
NC		 4473 FALSE otherwise. ISECTION is the best guess matching section from the
4474 input bfd IBFD, but it might be NULL. */
4475
84865015 4476static bfd_boolean
5522f910
NC		 4477elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4478 bfd *obfd ATTRIBUTE_UNUSED,
4479 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4480 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 4481{
4482 /* PR 19938: FIXME: Need to add code for setting the sh_info
5522f910
NC		 4483 and sh_link fields of Solaris specific section types. */
4484 return FALSE;
84865015 4485
5522f910 4486 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
84865015
NC		 4487 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4488
4489http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4490
4491 The following values should be set:
07d6d2b8
AM		 4492
4493Type Link Info
84865015
NC		 4494-----------------------------------------------------------------------------
4495SHT_SUNW_ancillary The section header index of 0
07d6d2b8
AM		 4496 [0x6fffffee] the associated string table.
4497
84865015 4498SHT_SUNW_capinfo The section header index of For a dynamic object, the
07d6d2b8
AM		 4499 [0x6ffffff0] the associated symbol table. section header index of
4500 the associated
84865015
NC		 4501 SHT_SUNW_capchain table,
4502 otherwise 0.
4503
4504SHT_SUNW_symsort The section header index of 0
07d6d2b8 4505 [0x6ffffff1] the associated symbol table.
84865015
NC		 4506
4507SHT_SUNW_tlssort The section header index of 0
07d6d2b8
AM		 4508 [0x6ffffff2] the associated symbol table.
4509
4510SHT_SUNW_LDYNSYM The section header index of One greater than the
4511 [0x6ffffff3] the associated string table. symbol table index of the
4512 This index is the same string last local symbol,
84865015 4513 table used by the SHT_DYNSYM STB_LOCAL. Since
07d6d2b8
AM		 4514 section. SHT_SUNW_LDYNSYM only
4515 contains local symbols,
84865015
NC		 4516 sh_info is equivalent to
4517 the number of symbols in
4518 the table.
4519
07d6d2b8
AM		 4520SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4521 [0x6ffffff5] the section header index of to named strings, the
4522 the associated section header index of
4523 SHT_SUNW_capinfo table, the associated string
4524 otherwise 0. table, otherwise 0.
84865015 4525
07d6d2b8
AM		 4526SHT_SUNW_move The section header index of 0
4527 [0x6ffffffa] the associated symbol table.
4528
4529SHT_SUNW_COMDAT 0 0
84865015
NC		 4530 [0x6ffffffb]
4531
4532SHT_SUNW_syminfo The section header index of The section header index
07d6d2b8
AM		 4533 [0x6ffffffc] the associated symbol table. of the associated
4534 .dynamic section.
84865015 4535
07d6d2b8
AM		 4536SHT_SUNW_verdef The section header index of The number of version
4537 [0x6ffffffd] the associated string table. definitions within the
4538 section.
84865015
NC		 4539
4540SHT_SUNW_verneed The section header index of The number of version
07d6d2b8
AM		 4541 [0x6ffffffe] the associated string table. dependencies within the
4542 section.
84865015 4543
07d6d2b8
AM		 4544SHT_SUNW_versym The section header index of 0
4545 [0x6fffffff] the associated symbol table. */
84865015
NC		 4546}
4547
5522f910
NC		 4548#undef elf_backend_copy_special_section_fields
4549#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
84865015 4550
a6cc6b3b
RO		 4551#include "elf32-target.h"
4552
bf64a951
L		 4553/* Intel MCU support. */
4554
4555static bfd_boolean
4556elf32_iamcu_elf_object_p (bfd *abfd)
4557{
4558 /* Set the right machine number for an IAMCU elf32 file. */
4559 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4560 return TRUE;
4561}
4562
4563#undef TARGET_LITTLE_SYM
4564#define TARGET_LITTLE_SYM iamcu_elf32_vec
4565#undef TARGET_LITTLE_NAME
4566#define TARGET_LITTLE_NAME "elf32-iamcu"
84865015 4567#undef ELF_ARCH
bf64a951
L		 4568#define ELF_ARCH bfd_arch_iamcu
4569
4570#undef ELF_MACHINE_CODE
4571#define ELF_MACHINE_CODE EM_IAMCU
4572
3b4c3844
L		 4573#undef elf_backend_arch_data
4574#define elf_backend_arch_data &elf_i386_arch_bed
4575
bf64a951
L		 4576#undef ELF_OSABI
4577
4578#undef elf32_bed
4579#define elf32_bed elf32_iamcu_bed
4580
4581#undef elf_backend_object_p
4582#define elf_backend_object_p elf32_iamcu_elf_object_p
4583
4584#undef elf_backend_static_tls_alignment
4585
4586#undef elf_backend_want_plt_sym
07d6d2b8 4587#define elf_backend_want_plt_sym 0
bf64a951 4588
84865015 4589#undef elf_backend_strtab_flags
5522f910 4590#undef elf_backend_copy_special_section_fields
84865015 4591
bf64a951
L		 4592#include "elf32-target.h"
4593
4594/* Restore defaults. */
4595#undef ELF_ARCH
4596#define ELF_ARCH bfd_arch_i386
4597#undef ELF_MACHINE_CODE
4598#define ELF_MACHINE_CODE EM_386
4599
a27e4371
RM		 4600/* Native Client support. */
4601
4602#undef TARGET_LITTLE_SYM
6d00b590 4603#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 4604#undef TARGET_LITTLE_NAME
4605#define TARGET_LITTLE_NAME "elf32-i386-nacl"
4606#undef elf32_bed
4607#define elf32_bed elf32_i386_nacl_bed
4608
4609#undef ELF_MAXPAGESIZE
4610#define ELF_MAXPAGESIZE 0x10000
4611
4612/* Restore defaults. */
4613#undef ELF_OSABI
4614#undef elf_backend_want_plt_sym
4615#define elf_backend_want_plt_sym 0
4616#undef elf_backend_post_process_headers
a27e4371
RM		 4617#undef elf_backend_static_tls_alignment
4618
4619/* NaCl uses substantially different PLT entries for the same effects. */
4620
4621#undef elf_backend_plt_alignment
4622#define elf_backend_plt_alignment 5
4623#define NACL_PLT_ENTRY_SIZE 64
4624#define NACLMASK 0xe0 /* 32-byte alignment mask. */
4625
4626static const bfd_byte elf_i386_nacl_plt0_entry[] =
4627 {
4628 0xff, 0x35, /* pushl contents of address */
07d6d2b8
AM		 4629 0, 0, 0, 0, /* replaced with address of .got + 4. */
4630 0x8b, 0x0d, /* movl contents of address, %ecx */
4631 0, 0, 0, 0, /* replaced with address of .got + 8. */
a27e4371
RM		 4632 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4633 0xff, 0xe1 /* jmp *%ecx */
4634 };
4635
4636static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
4637 {
4638 0x8b, 0x0d, /* movl contents of address, %ecx */
4639 0, 0, 0, 0, /* replaced with GOT slot address. */
4640 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4641 0xff, 0xe1, /* jmp *%ecx */
4642
07d6d2b8 4643 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4644 0x90,
4645 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4646 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4647
4648 /* Lazy GOT entries point here (32-byte aligned). */
4649 0x68, /* pushl immediate */
4650 0, 0, 0, 0, /* replaced with reloc offset. */
4651 0xe9, /* jmp relative */
07d6d2b8 4652 0, 0, 0, 0, /* replaced with offset to .plt. */
a27e4371 4653
07d6d2b8 4654 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4655 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4656 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4657 0x90, 0x90
4658 };
4659
4660static const bfd_byte
4661elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
4662 {
4663 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
4664 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
4665 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
4666 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 4667
4668 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
4669 so pad to that size with nop instructions. */
4670 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 4671 };
4672
4673static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
4674 {
07d6d2b8
AM		 4675 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
4676 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
4677 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
4678 0xff, 0xe1, /* jmp *%ecx */
a27e4371 4679
07d6d2b8 4680 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4681 0x90,
4682 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4683 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4684
4685 /* Lazy GOT entries point here (32-byte aligned). */
07d6d2b8
AM		 4686 0x68, /* pushl immediate */
4687 0, 0, 0, 0, /* replaced with offset into relocation table. */
4688 0xe9, /* jmp relative */
4689 0, 0, 0, 0, /* replaced with offset to start of .plt. */
a27e4371 4690
07d6d2b8 4691 /* Pad to the next 32-byte boundary with nop instructions. */
a27e4371
RM		 4692 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4693 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4694 0x90, 0x90
4695 };
4696
4697static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
4698 {
07d6d2b8
AM		 4699#if (PLT_CIE_LENGTH != 20 \
4700 || PLT_FDE_LENGTH != 36 \
4701 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
a27e4371 4702 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
851b6fa1 4703# error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
a27e4371
RM		 4704#endif
4705 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
07d6d2b8
AM		 4706 0, 0, 0, 0, /* CIE ID */
4707 1, /* CIE version */
4708 'z', 'R', 0, /* Augmentation string */
4709 1, /* Code alignment factor */
4710 0x7c, /* Data alignment factor: -4 */
4711 8, /* Return address column */
a27e4371
RM		 4712 1, /* Augmentation size */
4713 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
4714 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
4715 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
4716 DW_CFA_nop, DW_CFA_nop,
4717
07d6d2b8 4718 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
a27e4371 4719 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
07d6d2b8
AM		 4720 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
4721 0, 0, 0, 0, /* .plt size goes here */
4722 0, /* Augmentation size */
4723 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
4724 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
4725 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
4726 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
4727 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
4728 13, /* Block length */
4729 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
4730 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
a27e4371
RM		 4731 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
4732 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
4733 DW_CFA_nop, DW_CFA_nop
4734 };
4735
765e526c 4736static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
a27e4371
RM		 4737 {
4738 elf_i386_nacl_plt0_entry, /* plt0_entry */
4739 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
a27e4371
RM		 4740 elf_i386_nacl_plt_entry, /* plt_entry */
4741 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
92e68c1d
L		 4742 NULL, /* plt_tlsdesc_entry */
4743 0, /* plt_tlsdesc_entry_size*/
4744 0, /* plt_tlsdesc_got1_offset */
4745 0, /* plt_tlsdesc_got2_offset */
4746 0, /* plt_tlsdesc_got1_insn_end */
4747 0, /* plt_tlsdesc_got2_insn_end */
765e526c
L		 4748 2, /* plt0_got1_offset */
4749 8, /* plt0_got2_offset */
4750 0, /* plt0_got2_insn_end */
a27e4371
RM		 4751 2, /* plt_got_offset */
4752 33, /* plt_reloc_offset */
4753 38, /* plt_plt_offset */
765e526c
L		 4754 0, /* plt_got_insn_size */
4755 0, /* plt_plt_insn_end */
a27e4371
RM		 4756 32, /* plt_lazy_offset */
4757 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
4758 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
4759 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
f604c2a2 4760 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
a27e4371
RM		 4761 };
4762
851b6fa1 4763static const struct elf_x86_backend_data elf_i386_nacl_arch_bed =
a27e4371 4764 {
07d6d2b8 4765 is_nacl /* os */
a27e4371
RM		 4766 };
4767
64b384e1
RM		 4768static bfd_boolean
4769elf32_i386_nacl_elf_object_p (bfd *abfd)
4770{
4771 /* Set the right machine number for a NaCl i386 ELF32 file. */
4772 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
4773 return TRUE;
4774}
4775
a27e4371
RM		 4776#undef elf_backend_arch_data
4777#define elf_backend_arch_data &elf_i386_nacl_arch_bed
4778
64b384e1
RM		 4779#undef elf_backend_object_p
4780#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 4781#undef elf_backend_modify_segment_map
4782#define elf_backend_modify_segment_map nacl_modify_segment_map
4783#undef elf_backend_modify_program_headers
4784#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 4785#undef elf_backend_final_write_processing
4786#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 4787
a27e4371
RM		 4788#include "elf32-target.h"
4789
5a68afcf 4790/* Restore defaults. */
64b384e1 4791#undef elf_backend_object_p
5a68afcf
RM		 4792#undef elf_backend_modify_segment_map
4793#undef elf_backend_modify_program_headers
887badb3 4794#undef elf_backend_final_write_processing
5a68afcf 4795
eac338cf
PB		 4796/* VxWorks support. */
4797
4798#undef TARGET_LITTLE_SYM
6d00b590 4799#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 4800#undef TARGET_LITTLE_NAME
4801#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 4802#undef ELF_OSABI
1587442d
L		 4803#undef ELF_MAXPAGESIZE
4804#define ELF_MAXPAGESIZE 0x1000
a27e4371
RM		 4805#undef elf_backend_plt_alignment
4806#define elf_backend_plt_alignment 4
eac338cf 4807
851b6fa1 4808static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed =
23209a78 4809 {
07d6d2b8 4810 is_vxworks /* os */
23209a78 4811 };
eac338cf 4812
23209a78
RM		 4813#undef elf_backend_arch_data
4814#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 4815
13285a1b 4816#undef elf_backend_relocs_compatible
eac338cf
PB		 4817#undef elf_backend_add_symbol_hook
4818#define elf_backend_add_symbol_hook \
4819 elf_vxworks_add_symbol_hook
4820#undef elf_backend_link_output_symbol_hook
4821#define elf_backend_link_output_symbol_hook \
9c72ff84 4822 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 4823#undef elf_backend_emit_relocs
4824#define elf_backend_emit_relocs elf_vxworks_emit_relocs
4825#undef elf_backend_final_write_processing
4826#define elf_backend_final_write_processing \
4827 elf_vxworks_final_write_processing
7dc98aea 4828#undef elf_backend_static_tls_alignment
eac338cf
PB		 4829
4830/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4831 define it. */
4832#undef elf_backend_want_plt_sym
4833#define elf_backend_want_plt_sym 1
4834
4835#undef elf32_bed
4836#define elf32_bed elf32_i386_vxworks_bed
4837
4838#include "elf32-target.h"
GDB Binutils - Deliverables
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