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X86-64: Set check_relocs_failed on error
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
CommitLineData
252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
6f2750fe 2 Copyright (C) 1993-2016 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
252b5132 21#include "sysdep.h"
3db64b00 22#include "bfd.h"
252b5132
RH		 23#include "bfdlink.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
5a68afcf 26#include "elf-nacl.h"
eac338cf 27#include "elf-vxworks.h"
142411ca 28#include "bfd_stdint.h"
c25bc9fc
L		 29#include "objalloc.h"
30#include "hashtab.h"
e41b3a13 31#include "dwarf2.h"
02a86693 32#include "opcode/i386.h"
252b5132 33
55fd94b0
AM		 34/* 386 uses REL relocations instead of RELA. */
35#define USE_REL 1
252b5132
RH		 36
37#include "elf/i386.h"
38
39static reloc_howto_type elf_howto_table[]=
40{
6346d5ca 41 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
1b452ec6 42 bfd_elf_generic_reloc, "R_386_NONE",
b34976b6
AM		 43 TRUE, 0x00000000, 0x00000000, FALSE),
44 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 45 bfd_elf_generic_reloc, "R_386_32",
b34976b6
AM		 46 TRUE, 0xffffffff, 0xffffffff, FALSE),
47 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 48 bfd_elf_generic_reloc, "R_386_PC32",
b34976b6
AM		 49 TRUE, 0xffffffff, 0xffffffff, TRUE),
50 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 51 bfd_elf_generic_reloc, "R_386_GOT32",
b34976b6
AM		 52 TRUE, 0xffffffff, 0xffffffff, FALSE),
53 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 54 bfd_elf_generic_reloc, "R_386_PLT32",
b34976b6
AM		 55 TRUE, 0xffffffff, 0xffffffff, TRUE),
56 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 57 bfd_elf_generic_reloc, "R_386_COPY",
b34976b6
AM		 58 TRUE, 0xffffffff, 0xffffffff, FALSE),
59 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 60 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
b34976b6
AM		 61 TRUE, 0xffffffff, 0xffffffff, FALSE),
62 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 63 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
b34976b6
AM		 64 TRUE, 0xffffffff, 0xffffffff, FALSE),
65 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 66 bfd_elf_generic_reloc, "R_386_RELATIVE",
b34976b6
AM		 67 TRUE, 0xffffffff, 0xffffffff, FALSE),
68 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 69 bfd_elf_generic_reloc, "R_386_GOTOFF",
b34976b6
AM		 70 TRUE, 0xffffffff, 0xffffffff, FALSE),
71 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 72 bfd_elf_generic_reloc, "R_386_GOTPC",
b34976b6 73 TRUE, 0xffffffff, 0xffffffff, TRUE),
1b452ec6 74
dc47f327
AM		 75 /* We have a gap in the reloc numbers here.
76 R_386_standard counts the number up to this point, and
77 R_386_ext_offset is the value to subtract from a reloc type of
78 R_386_16 thru R_386_PC8 to form an index into this table. */
55fd94b0
AM		 79#define R_386_standard (R_386_GOTPC + 1)
80#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
1b452ec6 81
37e55690 82 /* These relocs are a GNU extension. */
b34976b6 83 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 84 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
b34976b6
AM		 85 TRUE, 0xffffffff, 0xffffffff, FALSE),
86 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 87 bfd_elf_generic_reloc, "R_386_TLS_IE",
b34976b6
AM		 88 TRUE, 0xffffffff, 0xffffffff, FALSE),
89 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 90 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
b34976b6
AM		 91 TRUE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 93 bfd_elf_generic_reloc, "R_386_TLS_LE",
b34976b6
AM		 94 TRUE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 96 bfd_elf_generic_reloc, "R_386_TLS_GD",
b34976b6
AM		 97 TRUE, 0xffffffff, 0xffffffff, FALSE),
98 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 99 bfd_elf_generic_reloc, "R_386_TLS_LDM",
b34976b6
AM		 100 TRUE, 0xffffffff, 0xffffffff, FALSE),
101 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
1b452ec6 102 bfd_elf_generic_reloc, "R_386_16",
b34976b6 103 TRUE, 0xffff, 0xffff, FALSE),
b0360d8c 104 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
1b452ec6 105 bfd_elf_generic_reloc, "R_386_PC16",
b34976b6
AM		 106 TRUE, 0xffff, 0xffff, TRUE),
107 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
1b452ec6 108 bfd_elf_generic_reloc, "R_386_8",
b34976b6
AM		 109 TRUE, 0xff, 0xff, FALSE),
110 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
1b452ec6 111 bfd_elf_generic_reloc, "R_386_PC8",
b34976b6 112 TRUE, 0xff, 0xff, TRUE),
dc47f327 113
55fd94b0
AM		 114#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
115#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
13ae64f3 116 /* These are common with Solaris TLS implementation. */
b34976b6 117 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 118 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
b34976b6
AM		 119 TRUE, 0xffffffff, 0xffffffff, FALSE),
120 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 121 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
b34976b6
AM		 122 TRUE, 0xffffffff, 0xffffffff, FALSE),
123 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 124 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
b34976b6
AM		 125 TRUE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 127 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
b34976b6
AM		 128 TRUE, 0xffffffff, 0xffffffff, FALSE),
129 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 130 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
b34976b6
AM		 131 TRUE, 0xffffffff, 0xffffffff, FALSE),
132 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 133 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
b34976b6 134 TRUE, 0xffffffff, 0xffffffff, FALSE),
1788fc08
L		 135 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
136 bfd_elf_generic_reloc, "R_386_SIZE32",
137 TRUE, 0xffffffff, 0xffffffff, FALSE),
67a4f2b7
AO		 138 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
140 TRUE, 0xffffffff, 0xffffffff, FALSE),
141 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
142 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
143 FALSE, 0, 0, FALSE),
144 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_386_TLS_DESC",
146 TRUE, 0xffffffff, 0xffffffff, FALSE),
cbe950e9
L		 147 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_386_IRELATIVE",
149 TRUE, 0xffffffff, 0xffffffff, FALSE),
02a86693
L		 150 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_386_GOT32X",
152 TRUE, 0xffffffff, 0xffffffff, FALSE),
13ae64f3
JJ		 153
154 /* Another gap. */
02a86693 155#define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
c74be520 156#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
252b5132
RH		 157
158/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH		 159 HOWTO (R_386_GNU_VTINHERIT, /* type */
160 0, /* rightshift */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
162 0, /* bitsize */
b34976b6 163 FALSE, /* pc_relative */
252b5132
RH		 164 0, /* bitpos */
165 complain_overflow_dont, /* complain_on_overflow */
166 NULL, /* special_function */
167 "R_386_GNU_VTINHERIT", /* name */
b34976b6 168 FALSE, /* partial_inplace */
252b5132
RH		 169 0, /* src_mask */
170 0, /* dst_mask */
b34976b6 171 FALSE), /* pcrel_offset */
252b5132
RH		 172
173/* GNU extension to record C++ vtable member usage. */
252b5132
RH		 174 HOWTO (R_386_GNU_VTENTRY, /* type */
175 0, /* rightshift */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
177 0, /* bitsize */
b34976b6 178 FALSE, /* pc_relative */
252b5132
RH		 179 0, /* bitpos */
180 complain_overflow_dont, /* complain_on_overflow */
181 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
182 "R_386_GNU_VTENTRY", /* name */
b34976b6 183 FALSE, /* partial_inplace */
252b5132
RH		 184 0, /* src_mask */
185 0, /* dst_mask */
b34976b6 186 FALSE) /* pcrel_offset */
dc47f327 187
55fd94b0 188#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
dc47f327
AM		 189
190};
191
252b5132 192#ifdef DEBUG_GEN_RELOC
55fd94b0
AM		 193#define TRACE(str) \
194 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH		 195#else
196#define TRACE(str)
197#endif
198
199static reloc_howto_type *
55fd94b0
AM		 200elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
201 bfd_reloc_code_real_type code)
252b5132
RH		 202{
203 switch (code)
204 {
205 case BFD_RELOC_NONE:
206 TRACE ("BFD_RELOC_NONE");
55fd94b0 207 return &elf_howto_table[R_386_NONE];
252b5132
RH		 208
209 case BFD_RELOC_32:
210 TRACE ("BFD_RELOC_32");
55fd94b0 211 return &elf_howto_table[R_386_32];
252b5132
RH		 212
213 case BFD_RELOC_CTOR:
214 TRACE ("BFD_RELOC_CTOR");
55fd94b0 215 return &elf_howto_table[R_386_32];
252b5132
RH		 216
217 case BFD_RELOC_32_PCREL:
218 TRACE ("BFD_RELOC_PC32");
55fd94b0 219 return &elf_howto_table[R_386_PC32];
252b5132
RH		 220
221 case BFD_RELOC_386_GOT32:
222 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 223 return &elf_howto_table[R_386_GOT32];
252b5132
RH		 224
225 case BFD_RELOC_386_PLT32:
226 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 227 return &elf_howto_table[R_386_PLT32];
252b5132
RH		 228
229 case BFD_RELOC_386_COPY:
230 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 231 return &elf_howto_table[R_386_COPY];
252b5132
RH		 232
233 case BFD_RELOC_386_GLOB_DAT:
234 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 235 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH		 236
237 case BFD_RELOC_386_JUMP_SLOT:
238 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 239 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH		 240
241 case BFD_RELOC_386_RELATIVE:
242 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 243 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH		 244
245 case BFD_RELOC_386_GOTOFF:
246 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 247 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH		 248
249 case BFD_RELOC_386_GOTPC:
250 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 251 return &elf_howto_table[R_386_GOTPC];
252b5132 252
37e55690
JJ		 253 /* These relocs are a GNU extension. */
254 case BFD_RELOC_386_TLS_TPOFF:
255 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 256 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ		 257
258 case BFD_RELOC_386_TLS_IE:
259 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 260 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ		 261
262 case BFD_RELOC_386_TLS_GOTIE:
263 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 264 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 265
13ae64f3
JJ		 266 case BFD_RELOC_386_TLS_LE:
267 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 268 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ		 269
270 case BFD_RELOC_386_TLS_GD:
271 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 272 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ		 273
274 case BFD_RELOC_386_TLS_LDM:
275 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 276 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 277
252b5132
RH		 278 case BFD_RELOC_16:
279 TRACE ("BFD_RELOC_16");
55fd94b0 280 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH		 281
282 case BFD_RELOC_16_PCREL:
283 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 284 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH		 285
286 case BFD_RELOC_8:
287 TRACE ("BFD_RELOC_8");
55fd94b0 288 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH		 289
290 case BFD_RELOC_8_PCREL:
291 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 292 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 293
13ae64f3
JJ		 294 /* Common with Sun TLS implementation. */
295 case BFD_RELOC_386_TLS_LDO_32:
296 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 297 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ		 298
299 case BFD_RELOC_386_TLS_IE_32:
300 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 301 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ		 302
303 case BFD_RELOC_386_TLS_LE_32:
304 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 305 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ		 306
307 case BFD_RELOC_386_TLS_DTPMOD32:
308 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 309 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ		 310
311 case BFD_RELOC_386_TLS_DTPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 313 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ		 314
315 case BFD_RELOC_386_TLS_TPOFF32:
316 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 317 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 318
1788fc08
L		 319 case BFD_RELOC_SIZE32:
320 TRACE ("BFD_RELOC_SIZE32");
321 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
322
67a4f2b7
AO		 323 case BFD_RELOC_386_TLS_GOTDESC:
324 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
325 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
326
327 case BFD_RELOC_386_TLS_DESC_CALL:
328 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
329 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
330
331 case BFD_RELOC_386_TLS_DESC:
332 TRACE ("BFD_RELOC_386_TLS_DESC");
333 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
334
cbe950e9
L		 335 case BFD_RELOC_386_IRELATIVE:
336 TRACE ("BFD_RELOC_386_IRELATIVE");
2a750708 337 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
cbe950e9 338
02a86693
L		 339 case BFD_RELOC_386_GOT32X:
340 TRACE ("BFD_RELOC_386_GOT32X");
341 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
342
252b5132
RH		 343 case BFD_RELOC_VTABLE_INHERIT:
344 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 345 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH		 346
347 case BFD_RELOC_VTABLE_ENTRY:
348 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 349 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH		 350
351 default:
352 break;
353 }
354
355 TRACE ("Unknown");
356 return 0;
357}
358
157090f7
AM		 359static reloc_howto_type *
360elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
361 const char *r_name)
362{
363 unsigned int i;
364
365 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
366 if (elf_howto_table[i].name != NULL
367 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
368 return &elf_howto_table[i];
369
370 return NULL;
371}
372
142411ca
L		 373static reloc_howto_type *
374elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
252b5132 375{
dc47f327
AM		 376 unsigned int indx;
377
378 if ((indx = r_type) >= R_386_standard
379 && ((indx = r_type - R_386_ext_offset) - R_386_standard
380 >= R_386_ext - R_386_standard)
13ae64f3 381 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520
L		 382 >= R_386_ext2 - R_386_ext)
383 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
384 >= R_386_vt - R_386_ext2))
252b5132 385 {
d003868e
AM		 386 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
387 abfd, (int) r_type);
55fd94b0 388 indx = R_386_NONE;
252b5132 389 }
06614111
NC		 390 /* PR 17512: file: 0f67f69d. */
391 if (elf_howto_table [indx].type != r_type)
392 return NULL;
142411ca
L		 393 return &elf_howto_table[indx];
394}
395
396static void
397elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
398 arelent *cache_ptr,
399 Elf_Internal_Rela *dst)
400{
401 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
402 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
252b5132
RH		 403}
404
405/* Return whether a symbol name implies a local label. The UnixWare
406 2.1 cc generates temporary symbols that start with .X, so we
407 recognize them here. FIXME: do other SVR4 compilers also use .X?.
408 If so, we should move the .X recognition into
409 _bfd_elf_is_local_label_name. */
410
b34976b6 411static bfd_boolean
55fd94b0 412elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH		 413{
414 if (name[0] == '.' && name[1] == 'X')
b34976b6 415 return TRUE;
252b5132
RH		 416
417 return _bfd_elf_is_local_label_name (abfd, name);
418}
419\f
38701953 420/* Support for core dump NOTE sections. */
61adc1a4 421
b34976b6 422static bfd_boolean
55fd94b0 423elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM		 424{
425 int offset;
eea6121a 426 size_t size;
38701953 427
61adc1a4 428 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 429 {
61adc1a4
NC		 430 int pr_version = bfd_get_32 (abfd, note->descdata);
431
432 if (pr_version != 1)
433 return FALSE;
434
435 /* pr_cursig */
228e534f 436 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
61adc1a4
NC		 437
438 /* pr_pid */
228e534f 439 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
61adc1a4
NC		 440
441 /* pr_reg */
442 offset = 28;
eea6121a 443 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC		 444 }
445 else
446 {
447 switch (note->descsz)
448 {
449 default:
450 return FALSE;
38701953 451
61adc1a4
NC		 452 case 144: /* Linux/i386 */
453 /* pr_cursig */
228e534f 454 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 455
61adc1a4 456 /* pr_pid */
228e534f 457 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
38701953 458
61adc1a4
NC		 459 /* pr_reg */
460 offset = 72;
eea6121a 461 size = 68;
38701953 462
61adc1a4
NC		 463 break;
464 }
38701953
AM		 465 }
466
467 /* Make a ".reg/999" section. */
468 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 469 size, note->descpos + offset);
38701953
AM		 470}
471
b34976b6 472static bfd_boolean
55fd94b0 473elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 474{
61adc1a4 475 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 476 {
61adc1a4
NC		 477 int pr_version = bfd_get_32 (abfd, note->descdata);
478
479 if (pr_version != 1)
b34976b6 480 return FALSE;
38701953 481
228e534f 482 elf_tdata (abfd)->core->program
61adc1a4 483 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
228e534f 484 elf_tdata (abfd)->core->command
61adc1a4
NC		 485 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
486 }
487 else
488 {
489 switch (note->descsz)
490 {
491 default:
492 return FALSE;
493
494 case 124: /* Linux/i386 elf_prpsinfo. */
228e534f 495 elf_tdata (abfd)->core->pid
261b8d08 496 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 497 elf_tdata (abfd)->core->program
61adc1a4 498 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 499 elf_tdata (abfd)->core->command
61adc1a4
NC		 500 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
501 }
38701953
AM		 502 }
503
504 /* Note that for some reason, a spurious space is tacked
505 onto the end of the args in some (at least one anyway)
506 implementations, so strip it off if it exists. */
38701953 507 {
228e534f 508 char *command = elf_tdata (abfd)->core->command;
38701953
AM		 509 int n = strlen (command);
510
511 if (0 < n && command[n - 1] == ' ')
512 command[n - 1] = '\0';
513 }
514
b34976b6 515 return TRUE;
38701953
AM		 516}
517\f
518/* Functions for the i386 ELF linker.
519
520 In order to gain some understanding of code in this file without
521 knowing all the intricate details of the linker, note the
522 following:
523
524 Functions named elf_i386_* are called by external routines, other
525 functions are only called locally. elf_i386_* functions appear
526 in this file more or less in the order in which they are called
527 from external routines. eg. elf_i386_check_relocs is called
528 early in the link process, elf_i386_finish_dynamic_sections is
529 one of the last functions. */
530
252b5132
RH		 531
532/* The name of the dynamic interpreter. This is put in the .interp
533 section. */
534
535#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
536
a23b6845
AM		 537/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
538 copying dynamic variables from a shared lib into an app's dynbss
539 section, and instead use a dynamic relocation to point into the
540 shared lib. */
541#define ELIMINATE_COPY_RELOCS 1
542
252b5132
RH		 543/* The size in bytes of an entry in the procedure linkage table. */
544
545#define PLT_ENTRY_SIZE 16
546
547/* The first entry in an absolute procedure linkage table looks like
eac338cf
PB		 548 this. See the SVR4 ABI i386 supplement to see how this works.
549 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 550
eac338cf 551static const bfd_byte elf_i386_plt0_entry[12] =
252b5132
RH		 552{
553 0xff, 0x35, /* pushl contents of address */
554 0, 0, 0, 0, /* replaced with address of .got + 4. */
555 0xff, 0x25, /* jmp indirect */
eac338cf 556 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 557};
558
559/* Subsequent entries in an absolute procedure linkage table look like
560 this. */
561
562static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
563{
564 0xff, 0x25, /* jmp indirect */
565 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
566 0x68, /* pushl immediate */
567 0, 0, 0, 0, /* replaced with offset into relocation table. */
568 0xe9, /* jmp relative */
569 0, 0, 0, 0 /* replaced with offset to start of .plt. */
570};
571
eac338cf
PB		 572/* The first entry in a PIC procedure linkage table look like this.
573 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 574
eac338cf 575static const bfd_byte elf_i386_pic_plt0_entry[12] =
252b5132
RH		 576{
577 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 578 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 579};
580
581/* Subsequent entries in a PIC procedure linkage table look like this. */
582
583static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
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
dd7e64d4
L		 593/* Entries in the GOT procedure linkage table look like this. */
594
595static const bfd_byte elf_i386_got_plt_entry[8] =
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
602/* Entries in the PIC GOT procedure linkage table look like this. */
603
604static const bfd_byte elf_i386_pic_got_plt_entry[8] =
605{
606 0xff, 0xa3, /* jmp *offset(%ebx) */
607 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
608 0x66, 0x90 /* xchg %ax,%ax */
609};
610
e41b3a13
JJ		 611/* .eh_frame covering the .plt section. */
612
613static const bfd_byte elf_i386_eh_frame_plt[] =
614{
615#define PLT_CIE_LENGTH 20
616#define PLT_FDE_LENGTH 36
617#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
618#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
619 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
620 0, 0, 0, 0, /* CIE ID */
621 1, /* CIE version */
622 'z', 'R', 0, /* Augmentation string */
623 1, /* Code alignment factor */
624 0x7c, /* Data alignment factor */
625 8, /* Return address column */
626 1, /* Augmentation size */
627 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
628 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
629 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
630 DW_CFA_nop, DW_CFA_nop,
631
632 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
633 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
634 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
635 0, 0, 0, 0, /* .plt size goes here */
636 0, /* Augmentation size */
637 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
638 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
639 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
640 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
641 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
642 11, /* Block length */
643 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
644 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
645 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
28ede8be 646 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
e41b3a13
JJ		 647 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
648};
649
25e762b9
RM		 650struct elf_i386_plt_layout
651{
652 /* The first entry in an absolute procedure linkage table looks like this. */
653 const bfd_byte *plt0_entry;
654 unsigned int plt0_entry_size;
655
656 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
657 unsigned int plt0_got1_offset;
658 unsigned int plt0_got2_offset;
659
660 /* Later entries in an absolute procedure linkage table look like this. */
661 const bfd_byte *plt_entry;
662 unsigned int plt_entry_size;
663
664 /* Offsets into plt_entry that are to be replaced with... */
665 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
666 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
667 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
668
669 /* Offset into plt_entry where the initial value of the GOT entry points. */
670 unsigned int plt_lazy_offset;
671
672 /* The first entry in a PIC procedure linkage table looks like this. */
673 const bfd_byte *pic_plt0_entry;
674
675 /* Subsequent entries in a PIC procedure linkage table look like this. */
676 const bfd_byte *pic_plt_entry;
677
678 /* .eh_frame covering the .plt section. */
679 const bfd_byte *eh_frame_plt;
680 unsigned int eh_frame_plt_size;
681};
682
683#define GET_PLT_ENTRY_SIZE(abfd) \
684 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
685
686/* These are the standard parameters. */
687static const struct elf_i386_plt_layout elf_i386_plt =
688 {
689 elf_i386_plt0_entry, /* plt0_entry */
690 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
691 2, /* plt0_got1_offset */
692 8, /* plt0_got2_offset */
693 elf_i386_plt_entry, /* plt_entry */
694 PLT_ENTRY_SIZE, /* plt_entry_size */
695 2, /* plt_got_offset */
696 7, /* plt_reloc_offset */
697 12, /* plt_plt_offset */
698 6, /* plt_lazy_offset */
699 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
700 elf_i386_pic_plt_entry, /* pic_plt_entry */
701 elf_i386_eh_frame_plt, /* eh_frame_plt */
702 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
703 };
704\f
705
eac338cf
PB		 706/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
707 for the PLTResolve stub and then for each PLT entry. */
708#define PLTRESOLVE_RELOCS_SHLIB 0
709#define PLTRESOLVE_RELOCS 2
710#define PLT_NON_JUMP_SLOT_RELOCS 2
711
23209a78
RM		 712/* Architecture-specific backend data for i386. */
713
714struct elf_i386_backend_data
715{
25e762b9
RM		 716 /* Parameters describing PLT generation. */
717 const struct elf_i386_plt_layout *plt;
718
23209a78
RM		 719 /* Value used to fill the unused bytes of the first PLT entry. */
720 bfd_byte plt0_pad_byte;
721
722 /* True if the target system is VxWorks. */
723 int is_vxworks;
724};
725
726#define get_elf_i386_backend_data(abfd) \
727 ((const struct elf_i386_backend_data *) \
728 get_elf_backend_data (abfd)->arch_data)
729
730/* These are the standard parameters. */
731static const struct elf_i386_backend_data elf_i386_arch_bed =
732 {
25e762b9 733 &elf_i386_plt, /* plt */
23209a78
RM		 734 0, /* plt0_pad_byte */
735 0, /* is_vxworks */
736 };
737
738#define elf_backend_arch_data &elf_i386_arch_bed
739
aec6b87e
L		 740/* Is a undefined weak symbol which is resolved to 0. Reference to an
741 undefined weak symbol is resolved to 0 when building executable if
742 it isn't dynamic and
743 1. Has non-GOT/non-PLT relocations in text section. Or
744 2. Has no GOT/PLT relocation.
745 */
746#define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \
747 ((EH)->elf.root.type == bfd_link_hash_undefweak \
748 && bfd_link_executable (INFO) \
749 && (elf_i386_hash_table (INFO)->interp == NULL \
750 || !(EH)->has_got_reloc \
751 || (EH)->has_non_got_reloc \
752 || !(INFO)->dynamic_undefined_weak))
753
252b5132
RH		 754/* i386 ELF linker hash entry. */
755
756struct elf_i386_link_hash_entry
757{
ebe50bae 758 struct elf_link_hash_entry elf;
252b5132 759
0c715baa 760 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 761 struct elf_dyn_relocs *dyn_relocs;
13ae64f3 762
37e55690
JJ		 763#define GOT_UNKNOWN 0
764#define GOT_NORMAL 1
765#define GOT_TLS_GD 2
766#define GOT_TLS_IE 4
767#define GOT_TLS_IE_POS 5
768#define GOT_TLS_IE_NEG 6
769#define GOT_TLS_IE_BOTH 7
67a4f2b7
AO		 770#define GOT_TLS_GDESC 8
771#define GOT_TLS_GD_BOTH_P(type) \
772 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
773#define GOT_TLS_GD_P(type) \
774 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
775#define GOT_TLS_GDESC_P(type) \
776 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
777#define GOT_TLS_GD_ANY_P(type) \
778 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
37e55690 779 unsigned char tls_type;
67a4f2b7 780
d5597ebc
L		 781 /* Symbol is referenced by R_386_GOTOFF relocation. */
782 unsigned int gotoff_ref : 1;
783
aec6b87e
L		 784 /* Symbol has GOT or PLT relocations. */
785 unsigned int has_got_reloc : 1;
786
787 /* Symbol has non-GOT/non-PLT relocations in text sections. */
788 unsigned int has_non_got_reloc : 1;
789
04ebc307
L		 790 /* Reference count of C/C++ function pointer relocations in read-write
791 section which can be resolved at run-time. */
792 bfd_signed_vma func_pointer_refcount;
793
dd7e64d4
L		 794 /* Information about the GOT PLT entry. Filled when there are both
795 GOT and PLT relocations against the same function. */
796 union gotplt_union plt_got;
797
67a4f2b7
AO		 798 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
799 starting at the end of the jump table. */
800 bfd_vma tlsdesc_got;
13ae64f3
JJ		 801};
802
803#define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
804
805struct elf_i386_obj_tdata
806{
807 struct elf_obj_tdata root;
808
809 /* tls_type for each local got entry. */
810 char *local_got_tls_type;
67a4f2b7
AO		 811
812 /* GOTPLT entries for TLS descriptors. */
813 bfd_vma *local_tlsdesc_gotent;
252b5132
RH		 814};
815
13ae64f3
JJ		 816#define elf_i386_tdata(abfd) \
817 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
818
819#define elf_i386_local_got_tls_type(abfd) \
820 (elf_i386_tdata (abfd)->local_got_tls_type)
821
67a4f2b7
AO		 822#define elf_i386_local_tlsdesc_gotent(abfd) \
823 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
824
0ffa91dd
NC		 825#define is_i386_elf(bfd) \
826 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
827 && elf_tdata (bfd) != NULL \
4dfe6ac6 828 && elf_object_id (bfd) == I386_ELF_DATA)
0ffa91dd 829
b34976b6 830static bfd_boolean
55fd94b0 831elf_i386_mkobject (bfd *abfd)
13ae64f3 832{
0ffa91dd 833 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
4dfe6ac6 834 I386_ELF_DATA);
13ae64f3 835}
cedb70c5 836
252b5132
RH		 837/* i386 ELF linker hash table. */
838
839struct elf_i386_link_hash_table
840{
ebe50bae 841 struct elf_link_hash_table elf;
252b5132 842
6725bdbf 843 /* Short-cuts to get to dynamic linker sections. */
aec6b87e 844 asection *interp;
6725bdbf
AM		 845 asection *sdynbss;
846 asection *srelbss;
e41b3a13 847 asection *plt_eh_frame;
dd7e64d4 848 asection *plt_got;
9635fe29 849
4dfe6ac6
NC		 850 union
851 {
13ae64f3
JJ		 852 bfd_signed_vma refcount;
853 bfd_vma offset;
854 } tls_ldm_got;
855
67a4f2b7
AO		 856 /* The amount of space used by the reserved portion of the sgotplt
857 section, plus whatever space is used by the jump slots. */
858 bfd_vma sgotplt_jump_table_size;
859
87d72d41
AM		 860 /* Small local sym cache. */
861 struct sym_cache sym_cache;
9f03412a
AO		 862
863 /* _TLS_MODULE_BASE_ symbol. */
864 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L		 865
866 /* Used by local STT_GNU_IFUNC symbols. */
867 htab_t loc_hash_table;
4dfe6ac6
NC		 868 void * loc_hash_memory;
869
870 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
871 asection *srelplt2;
872
4dfe6ac6
NC		 873 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
874 bfd_vma next_tls_desc_index;
e1f98742
L		 875
876 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
877 bfd_vma next_jump_slot_index;
878
879 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
880 bfd_vma next_irelative_index;
2df3368d
L		 881
882 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
883 to read-only sections. */
884 bfd_boolean readonly_dynrelocs_against_ifunc;
6725bdbf 885};
252b5132
RH		 886
887/* Get the i386 ELF linker hash table from a link_info structure. */
888
889#define elf_i386_hash_table(p) \
4dfe6ac6
NC		 890 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
891 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
252b5132 892
67a4f2b7 893#define elf_i386_compute_jump_table_size(htab) \
998d811a 894 ((htab)->elf.srelplt->reloc_count * 4)
67a4f2b7 895
252b5132
RH		 896/* Create an entry in an i386 ELF linker hash table. */
897
898static struct bfd_hash_entry *
eb4ff4d6
L		 899elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
900 struct bfd_hash_table *table,
901 const char *string)
252b5132 902{
252b5132
RH		 903 /* Allocate the structure if it has not already been allocated by a
904 subclass. */
ebe50bae
AM		 905 if (entry == NULL)
906 {
a50b1753
NC		 907 entry = (struct bfd_hash_entry *)
908 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
ebe50bae
AM		 909 if (entry == NULL)
910 return entry;
911 }
252b5132
RH		 912
913 /* Call the allocation method of the superclass. */
ebe50bae
AM		 914 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
915 if (entry != NULL)
252b5132 916 {
ebe50bae
AM		 917 struct elf_i386_link_hash_entry *eh;
918
919 eh = (struct elf_i386_link_hash_entry *) entry;
920 eh->dyn_relocs = NULL;
13ae64f3 921 eh->tls_type = GOT_UNKNOWN;
d5597ebc 922 eh->gotoff_ref = 0;
aec6b87e
L		 923 eh->has_got_reloc = 0;
924 eh->has_non_got_reloc = 0;
04ebc307 925 eh->func_pointer_refcount = 0;
dd7e64d4 926 eh->plt_got.offset = (bfd_vma) -1;
67a4f2b7 927 eh->tlsdesc_got = (bfd_vma) -1;
252b5132
RH		 928 }
929
ebe50bae 930 return entry;
252b5132
RH		 931}
932
c25bc9fc
L		 933/* Compute a hash of a local hash entry. We use elf_link_hash_entry
934 for local symbol so that we can handle local STT_GNU_IFUNC symbols
935 as global symbol. We reuse indx and dynstr_index for local symbol
936 hash since they aren't used by global symbols in this backend. */
937
938static hashval_t
939elf_i386_local_htab_hash (const void *ptr)
940{
941 struct elf_link_hash_entry *h
942 = (struct elf_link_hash_entry *) ptr;
d2149d72 943 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L		 944}
945
946/* Compare local hash entries. */
947
948static int
949elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
950{
951 struct elf_link_hash_entry *h1
952 = (struct elf_link_hash_entry *) ptr1;
953 struct elf_link_hash_entry *h2
954 = (struct elf_link_hash_entry *) ptr2;
955
956 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
957}
958
959/* Find and/or create a hash entry for local symbol. */
960
961static struct elf_link_hash_entry *
962elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
963 bfd *abfd, const Elf_Internal_Rela *rel,
964 bfd_boolean create)
965{
966 struct elf_i386_link_hash_entry e, *ret;
967 asection *sec = abfd->sections;
d2149d72
L		 968 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
969 ELF32_R_SYM (rel->r_info));
c25bc9fc
L		 970 void **slot;
971
972 e.elf.indx = sec->id;
973 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
974 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
975 create ? INSERT : NO_INSERT);
976
977 if (!slot)
978 return NULL;
979
980 if (*slot)
981 {
982 ret = (struct elf_i386_link_hash_entry *) *slot;
983 return &ret->elf;
984 }
985
986 ret = (struct elf_i386_link_hash_entry *)
987 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
988 sizeof (struct elf_i386_link_hash_entry));
989 if (ret)
990 {
991 memset (ret, 0, sizeof (*ret));
992 ret->elf.indx = sec->id;
993 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
994 ret->elf.dynindx = -1;
04ebc307 995 ret->func_pointer_refcount = 0;
dd7e64d4 996 ret->plt_got.offset = (bfd_vma) -1;
c25bc9fc
L		 997 *slot = ret;
998 }
999 return &ret->elf;
1000}
1001
68faa637
AM		 1002/* Destroy an i386 ELF linker hash table. */
1003
1004static void
d495ab0d 1005elf_i386_link_hash_table_free (bfd *obfd)
68faa637
AM		 1006{
1007 struct elf_i386_link_hash_table *htab
d495ab0d 1008 = (struct elf_i386_link_hash_table *) obfd->link.hash;
68faa637
AM		 1009
1010 if (htab->loc_hash_table)
1011 htab_delete (htab->loc_hash_table);
1012 if (htab->loc_hash_memory)
1013 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
d495ab0d 1014 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 1015}
1016
252b5132
RH		 1017/* Create an i386 ELF linker hash table. */
1018
1019static struct bfd_link_hash_table *
55fd94b0 1020elf_i386_link_hash_table_create (bfd *abfd)
252b5132
RH		 1021{
1022 struct elf_i386_link_hash_table *ret;
dc810e39 1023 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
252b5132 1024
7bf52ea2 1025 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
ebe50bae 1026 if (ret == NULL)
252b5132
RH		 1027 return NULL;
1028
eb4ff4d6
L		 1029 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1030 elf_i386_link_hash_newfunc,
4dfe6ac6
NC		 1031 sizeof (struct elf_i386_link_hash_entry),
1032 I386_ELF_DATA))
252b5132 1033 {
e2d34d7d 1034 free (ret);
252b5132
RH		 1035 return NULL;
1036 }
1037
c25bc9fc
L		 1038 ret->loc_hash_table = htab_try_create (1024,
1039 elf_i386_local_htab_hash,
1040 elf_i386_local_htab_eq,
1041 NULL);
1042 ret->loc_hash_memory = objalloc_create ();
1043 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1044 {
d495ab0d 1045 elf_i386_link_hash_table_free (abfd);
c25bc9fc
L		 1046 return NULL;
1047 }
d495ab0d 1048 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
c25bc9fc 1049
ebe50bae 1050 return &ret->elf.root;
252b5132
RH		 1051}
1052
6725bdbf
AM		 1053/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1054 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1055 hash table. */
1056
b34976b6 1057static bfd_boolean
55fd94b0 1058elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM		 1059{
1060 struct elf_i386_link_hash_table *htab;
1061
6725bdbf 1062 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 1063 return FALSE;
6725bdbf 1064
6de2ae4a 1065 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 1066 if (htab == NULL)
1067 return FALSE;
1068
3d4d4302 1069 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
d5597ebc 1070 if (!htab->sdynbss)
6725bdbf
AM		 1071 abort ();
1072
0e1862bb 1073 if (bfd_link_executable (info))
d5597ebc
L		 1074 {
1075 /* Always allow copy relocs for building executables. */
1076 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1077 if (s == NULL)
1078 {
1079 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1080 s = bfd_make_section_anyway_with_flags (dynobj,
1081 ".rel.bss",
1082 (bed->dynamic_sec_flags
1083 | SEC_READONLY));
1084 if (s == NULL
1085 || ! bfd_set_section_alignment (dynobj, s,
1086 bed->s->log_file_align))
1087 return FALSE;
1088 }
1089 htab->srelbss = s;
1090 }
1091
23209a78 1092 if (get_elf_i386_backend_data (dynobj)->is_vxworks
6de2ae4a
L		 1093 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1094 &htab->srelplt2))
711de32c 1095 return FALSE;
eac338cf 1096
e41b3a13 1097 if (!info->no_ld_generated_unwind_info
2fe0fd06 1098 && htab->plt_eh_frame == NULL
e4de50d4 1099 && htab->elf.splt != NULL)
e41b3a13 1100 {
bbf96e4e
L		 1101 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1102 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1103 | SEC_LINKER_CREATED);
e41b3a13 1104 htab->plt_eh_frame
bbf96e4e 1105 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ		 1106 if (htab->plt_eh_frame == NULL
1107 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1108 return FALSE;
e41b3a13
JJ		 1109 }
1110
b34976b6 1111 return TRUE;
6725bdbf
AM		 1112}
1113
ebe50bae
AM		 1114/* Copy the extra info we tack onto an elf_link_hash_entry. */
1115
51b64d56 1116static void
fcfa13d2 1117elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
55fd94b0
AM		 1118 struct elf_link_hash_entry *dir,
1119 struct elf_link_hash_entry *ind)
ebe50bae
AM		 1120{
1121 struct elf_i386_link_hash_entry *edir, *eind;
1122
1123 edir = (struct elf_i386_link_hash_entry *) dir;
1124 eind = (struct elf_i386_link_hash_entry *) ind;
1125
bbd7ec4a 1126 if (eind->dyn_relocs != NULL)
ebe50bae 1127 {
bbd7ec4a
AM		 1128 if (edir->dyn_relocs != NULL)
1129 {
e03a8ed8
L		 1130 struct elf_dyn_relocs **pp;
1131 struct elf_dyn_relocs *p;
bbd7ec4a 1132
fcfa13d2 1133 /* Add reloc counts against the indirect sym to the direct sym
bbd7ec4a
AM		 1134 list. Merge any entries against the same section. */
1135 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1136 {
e03a8ed8 1137 struct elf_dyn_relocs *q;
bbd7ec4a
AM		 1138
1139 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1140 if (q->sec == p->sec)
1141 {
1142 q->pc_count += p->pc_count;
1143 q->count += p->count;
1144 *pp = p->next;
1145 break;
1146 }
1147 if (q == NULL)
1148 pp = &p->next;
1149 }
1150 *pp = edir->dyn_relocs;
1151 }
1152
ebe50bae
AM		 1153 edir->dyn_relocs = eind->dyn_relocs;
1154 eind->dyn_relocs = NULL;
1155 }
ebe50bae 1156
cd67d266
JJ		 1157 if (ind->root.type == bfd_link_hash_indirect
1158 && dir->got.refcount <= 0)
1159 {
1160 edir->tls_type = eind->tls_type;
1161 eind->tls_type = GOT_UNKNOWN;
1162 }
81848ca0 1163
d5597ebc
L		 1164 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1165 generate a R_386_COPY reloc. */
1166 edir->gotoff_ref |= eind->gotoff_ref;
1167
aec6b87e
L		 1168 edir->has_got_reloc |= eind->has_got_reloc;
1169 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1170
81848ca0
AM		 1171 if (ELIMINATE_COPY_RELOCS
1172 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 1173 && dir->dynamic_adjusted)
1174 {
1175 /* If called to transfer flags for a weakdef during processing
1176 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1177 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1178 dir->ref_dynamic |= ind->ref_dynamic;
1179 dir->ref_regular |= ind->ref_regular;
1180 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1181 dir->needs_plt |= ind->needs_plt;
1182 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1183 }
81848ca0 1184 else
04ebc307
L		 1185 {
1186 if (eind->func_pointer_refcount > 0)
1187 {
1188 edir->func_pointer_refcount += eind->func_pointer_refcount;
1189 eind->func_pointer_refcount = 0;
1190 }
1191
1192 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1193 }
ebe50bae
AM		 1194}
1195
142411ca
L		 1196/* Return TRUE if the TLS access code sequence support transition
1197 from R_TYPE. */
1198
1199static bfd_boolean
1200elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1201 bfd_byte *contents,
1202 Elf_Internal_Shdr *symtab_hdr,
1203 struct elf_link_hash_entry **sym_hashes,
1204 unsigned int r_type,
1205 const Elf_Internal_Rela *rel,
1206 const Elf_Internal_Rela *relend)
13ae64f3 1207{
142411ca
L		 1208 unsigned int val, type;
1209 unsigned long r_symndx;
1210 struct elf_link_hash_entry *h;
1211 bfd_vma offset;
1212
1213 /* Get the section contents. */
1214 if (contents == NULL)
1215 {
1216 if (elf_section_data (sec)->this_hdr.contents != NULL)
1217 contents = elf_section_data (sec)->this_hdr.contents;
1218 else
1219 {
1220 /* FIXME: How to better handle error condition? */
1221 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1222 return FALSE;
13ae64f3 1223
142411ca
L		 1224 /* Cache the section contents for elf_link_input_bfd. */
1225 elf_section_data (sec)->this_hdr.contents = contents;
1226 }
1227 }
1228
1229 offset = rel->r_offset;
13ae64f3 1230 switch (r_type)
142411ca
L		 1231 {
1232 case R_386_TLS_GD:
1233 case R_386_TLS_LDM:
1234 if (offset < 2 || (rel + 1) >= relend)
1235 return FALSE;
1236
1237 type = bfd_get_8 (abfd, contents + offset - 2);
1238 if (r_type == R_386_TLS_GD)
1239 {
09e8c3bf 1240 /* Check transition from GD access model. Only
142411ca
L		 1241 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1242 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1243 can transit to different access model. */
1244 if ((offset + 10) > sec->size ||
1245 (type != 0x8d && type != 0x04))
1246 return FALSE;
1247
1248 val = bfd_get_8 (abfd, contents + offset - 1);
1249 if (type == 0x04)
1250 {
1251 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1252 if (offset < 3)
1253 return FALSE;
1254
1255 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1256 return FALSE;
1257
1258 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1259 return FALSE;
1260 }
1261 else
1262 {
1263 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1264 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1265 return FALSE;
1266
1267 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1268 return FALSE;
1269 }
1270 }
1271 else
1272 {
1273 /* Check transition from LD access model. Only
1274 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1275 can transit to different access model. */
1276 if (type != 0x8d || (offset + 9) > sec->size)
1277 return FALSE;
1278
1279 val = bfd_get_8 (abfd, contents + offset - 1);
1280 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1281 return FALSE;
1282 }
1283
1284 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1285 return FALSE;
1286
1287 r_symndx = ELF32_R_SYM (rel[1].r_info);
1288 if (r_symndx < symtab_hdr->sh_info)
1289 return FALSE;
1290
1291 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b
L		 1292 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1293 may be versioned. */
142411ca
L		 1294 return (h != NULL
1295 && h->root.root.string != NULL
1296 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1297 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
c4fb387b
L		 1298 && (strncmp (h->root.root.string, "___tls_get_addr",
1299 15) == 0));
142411ca
L		 1300
1301 case R_386_TLS_IE:
1302 /* Check transition from IE access model:
1303 movl foo@indntpoff(%rip), %eax
1304 movl foo@indntpoff(%rip), %reg
1305 addl foo@indntpoff(%rip), %reg
1306 */
1307
1308 if (offset < 1 || (offset + 4) > sec->size)
1309 return FALSE;
1310
1311 /* Check "movl foo@tpoff(%rip), %eax" first. */
1312 val = bfd_get_8 (abfd, contents + offset - 1);
1313 if (val == 0xa1)
1314 return TRUE;
1315
1316 if (offset < 2)
1317 return FALSE;
1318
1319 /* Check movl|addl foo@tpoff(%rip), %reg. */
1320 type = bfd_get_8 (abfd, contents + offset - 2);
1321 return ((type == 0x8b || type == 0x03)
1322 && (val & 0xc7) == 0x05);
1323
1324 case R_386_TLS_GOTIE:
1325 case R_386_TLS_IE_32:
1326 /* Check transition from {IE_32,GOTIE} access model:
1327 subl foo@{tpoff,gontoff}(%reg1), %reg2
1328 movl foo@{tpoff,gontoff}(%reg1), %reg2
1329 addl foo@{tpoff,gontoff}(%reg1), %reg2
1330 */
1331
1332 if (offset < 2 || (offset + 4) > sec->size)
1333 return FALSE;
1334
1335 val = bfd_get_8 (abfd, contents + offset - 1);
1336 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1337 return FALSE;
1338
1339 type = bfd_get_8 (abfd, contents + offset - 2);
1340 return type == 0x8b || type == 0x2b || type == 0x03;
1341
1342 case R_386_TLS_GOTDESC:
1343 /* Check transition from GDesc access model:
1344 leal x@tlsdesc(%ebx), %eax
1345
1346 Make sure it's a leal adding ebx to a 32-bit offset
1347 into any register, although it's probably almost always
1348 going to be eax. */
1349
1350 if (offset < 2 || (offset + 4) > sec->size)
1351 return FALSE;
1352
1353 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1354 return FALSE;
1355
1356 val = bfd_get_8 (abfd, contents + offset - 1);
1357 return (val & 0xc7) == 0x83;
1358
1359 case R_386_TLS_DESC_CALL:
1360 /* Check transition from GDesc access model:
1361 call *x@tlsdesc(%rax)
1362 */
1363 if (offset + 2 <= sec->size)
1364 {
1365 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM		 1366 static const unsigned char call[] = { 0xff, 0x10 };
1367 return memcmp (contents + offset, call, 2) == 0;
142411ca
L		 1368 }
1369
1370 return FALSE;
1371
1372 default:
1373 abort ();
1374 }
1375}
1376
1377/* Return TRUE if the TLS access transition is OK or no transition
1378 will be performed. Update R_TYPE if there is a transition. */
1379
1380static bfd_boolean
1381elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1382 asection *sec, bfd_byte *contents,
1383 Elf_Internal_Shdr *symtab_hdr,
1384 struct elf_link_hash_entry **sym_hashes,
1385 unsigned int *r_type, int tls_type,
1386 const Elf_Internal_Rela *rel,
1387 const Elf_Internal_Rela *relend,
4c544807
L		 1388 struct elf_link_hash_entry *h,
1389 unsigned long r_symndx)
142411ca
L		 1390{
1391 unsigned int from_type = *r_type;
1392 unsigned int to_type = from_type;
1393 bfd_boolean check = TRUE;
1394
bb1cb422
L		 1395 /* Skip TLS transition for functions. */
1396 if (h != NULL
1397 && (h->type == STT_FUNC
1398 || h->type == STT_GNU_IFUNC))
1399 return TRUE;
1400
142411ca 1401 switch (from_type)
13ae64f3
JJ		 1402 {
1403 case R_386_TLS_GD:
67a4f2b7
AO		 1404 case R_386_TLS_GOTDESC:
1405 case R_386_TLS_DESC_CALL:
13ae64f3 1406 case R_386_TLS_IE_32:
37e55690
JJ		 1407 case R_386_TLS_IE:
1408 case R_386_TLS_GOTIE:
0e1862bb 1409 if (bfd_link_executable (info))
142411ca
L		 1410 {
1411 if (h == NULL)
1412 to_type = R_386_TLS_LE_32;
1413 else if (from_type != R_386_TLS_IE
1414 && from_type != R_386_TLS_GOTIE)
1415 to_type = R_386_TLS_IE_32;
1416 }
1417
1418 /* When we are called from elf_i386_relocate_section, CONTENTS
1419 isn't NULL and there may be additional transitions based on
1420 TLS_TYPE. */
1421 if (contents != NULL)
1422 {
1423 unsigned int new_to_type = to_type;
1424
0e1862bb 1425 if (bfd_link_executable (info)
142411ca
L		 1426 && h != NULL
1427 && h->dynindx == -1
1428 && (tls_type & GOT_TLS_IE))
1429 new_to_type = R_386_TLS_LE_32;
1430
1431 if (to_type == R_386_TLS_GD
1432 || to_type == R_386_TLS_GOTDESC
1433 || to_type == R_386_TLS_DESC_CALL)
1434 {
1435 if (tls_type == GOT_TLS_IE_POS)
1436 new_to_type = R_386_TLS_GOTIE;
1437 else if (tls_type & GOT_TLS_IE)
1438 new_to_type = R_386_TLS_IE_32;
1439 }
1440
1441 /* We checked the transition before when we were called from
1442 elf_i386_check_relocs. We only want to check the new
1443 transition which hasn't been checked before. */
1444 check = new_to_type != to_type && from_type == to_type;
1445 to_type = new_to_type;
1446 }
1447
1448 break;
1449
13ae64f3 1450 case R_386_TLS_LDM:
0e1862bb 1451 if (bfd_link_executable (info))
142411ca
L		 1452 to_type = R_386_TLS_LE_32;
1453 break;
1454
1455 default:
1456 return TRUE;
1457 }
1458
1459 /* Return TRUE if there is no transition. */
1460 if (from_type == to_type)
1461 return TRUE;
1462
1463 /* Check if the transition can be performed. */
1464 if (check
1465 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1466 symtab_hdr, sym_hashes,
1467 from_type, rel, relend))
1468 {
2f629d23 1469 reloc_howto_type *from, *to;
4c544807 1470 const char *name;
142411ca
L		 1471
1472 from = elf_i386_rtype_to_howto (abfd, from_type);
1473 to = elf_i386_rtype_to_howto (abfd, to_type);
1474
4c544807
L		 1475 if (h)
1476 name = h->root.root.string;
1477 else
1478 {
4c544807 1479 struct elf_i386_link_hash_table *htab;
4dfe6ac6 1480
4c544807 1481 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 1482 if (htab == NULL)
1483 name = "*unknown*";
1484 else
1485 {
1486 Elf_Internal_Sym *isym;
1487
1488 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1489 abfd, r_symndx);
1490 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1491 }
4c544807
L		 1492 }
1493
142411ca
L		 1494 (*_bfd_error_handler)
1495 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1496 "in section `%A' failed"),
4c544807 1497 abfd, sec, from->name, to->name, name,
142411ca
L		 1498 (unsigned long) rel->r_offset);
1499 bfd_set_error (bfd_error_bad_value);
1500 return FALSE;
13ae64f3
JJ		 1501 }
1502
142411ca
L		 1503 *r_type = to_type;
1504 return TRUE;
13ae64f3
JJ		 1505}
1506
c1d11331
L		 1507/* Rename some of the generic section flags to better document how they
1508 are used here. */
02a86693 1509#define need_convert_load sec_flg0
c1d11331 1510
252b5132 1511/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1512 calculate needed space in the global offset table, procedure linkage
1513 table, and dynamic reloc sections. */
252b5132 1514
b34976b6 1515static bfd_boolean
55fd94b0
AM		 1516elf_i386_check_relocs (bfd *abfd,
1517 struct bfd_link_info *info,
1518 asection *sec,
1519 const Elf_Internal_Rela *relocs)
252b5132 1520{
6725bdbf 1521 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1522 Elf_Internal_Shdr *symtab_hdr;
1523 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1524 const Elf_Internal_Rela *rel;
1525 const Elf_Internal_Rela *rel_end;
252b5132 1526 asection *sreloc;
dd7e64d4 1527 bfd_boolean use_plt_got;
252b5132 1528
0e1862bb 1529 if (bfd_link_relocatable (info))
b34976b6 1530 return TRUE;
252b5132 1531
0ffa91dd
NC		 1532 BFD_ASSERT (is_i386_elf (abfd));
1533
6725bdbf 1534 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 1535 if (htab == NULL)
1536 return FALSE;
1537
dd7e64d4
L		 1538 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1539 && (get_elf_i386_backend_data (abfd)
1540 == &elf_i386_arch_bed));
1541
0ffa91dd 1542 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1543 sym_hashes = elf_sym_hashes (abfd);
252b5132 1544
252b5132
RH		 1545 sreloc = NULL;
1546
1547 rel_end = relocs + sec->reloc_count;
1548 for (rel = relocs; rel < rel_end; rel++)
1549 {
13ae64f3 1550 unsigned int r_type;
252b5132
RH		 1551 unsigned long r_symndx;
1552 struct elf_link_hash_entry *h;
d5597ebc 1553 struct elf_i386_link_hash_entry *eh;
4c544807
L		 1554 Elf_Internal_Sym *isym;
1555 const char *name;
06a6a421 1556 bfd_boolean size_reloc;
252b5132
RH		 1557
1558 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1559 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1560
d9bc7a44 1561 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1562 {
d003868e
AM		 1563 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1564 abfd,
8f615d07 1565 r_symndx);
b34976b6 1566 return FALSE;
f5f31454
L		 1567 }
1568
252b5132 1569 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1570 {
1571 /* A local symbol. */
c2e61a4e
L		 1572 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1573 abfd, r_symndx);
1574 if (isym == NULL)
1575 return FALSE;
c25bc9fc
L		 1576
1577 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1578 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1579 {
9fff0c39 1580 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1581 if (h == NULL)
c2e61a4e 1582 return FALSE;
6bbec505 1583
c25bc9fc
L		 1584 /* Fake a STT_GNU_IFUNC symbol. */
1585 h->type = STT_GNU_IFUNC;
1586 h->def_regular = 1;
1587 h->ref_regular = 1;
1588 h->forced_local = 1;
1589 h->root.type = bfd_link_hash_defined;
1590 }
1591 else
1592 h = NULL;
1593 }
252b5132 1594 else
71cb9464 1595 {
4c544807 1596 isym = NULL;
71cb9464
L		 1597 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1598 while (h->root.type == bfd_link_hash_indirect
1599 || h->root.type == bfd_link_hash_warning)
1600 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1601 }
cbe950e9 1602
d5597ebc 1603 eh = (struct elf_i386_link_hash_entry *) h;
c25bc9fc
L		 1604 if (h != NULL)
1605 {
cbe950e9
L		 1606 switch (r_type)
1607 {
1608 default:
1609 break;
1610
d5597ebc
L		 1611 case R_386_GOTOFF:
1612 eh->gotoff_ref = 1;
cbe950e9
L		 1613 case R_386_32:
1614 case R_386_PC32:
1615 case R_386_PLT32:
1616 case R_386_GOT32:
02a86693 1617 case R_386_GOT32X:
9d4057ee
AM		 1618 if (htab->elf.dynobj == NULL)
1619 htab->elf.dynobj = abfd;
466ee2af
L		 1620 /* Create the ifunc sections for static executables. */
1621 if (h->type == STT_GNU_IFUNC
1622 && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj,
1623 info))
c2e61a4e 1624 return FALSE;
cbe950e9
L		 1625 break;
1626 }
1627
ad1e85de
L		 1628 /* It is referenced by a non-shared object. */
1629 h->ref_regular = 1;
61315175 1630 h->root.non_ir_ref = 1;
13a2df29
L		 1631
1632 if (h->type == STT_GNU_IFUNC)
1633 elf_tdata (info->output_bfd)->has_gnu_symbols
1634 |= elf_gnu_symbol_ifunc;
71cb9464 1635 }
252b5132 1636
142411ca
L		 1637 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1638 symtab_hdr, sym_hashes,
1639 &r_type, GOT_UNKNOWN,
23209a78 1640 rel, rel_end, h, r_symndx))
c2e61a4e 1641 return FALSE;
13ae64f3
JJ		 1642
1643 switch (r_type)
252b5132 1644 {
37e55690
JJ		 1645 case R_386_TLS_LDM:
1646 htab->tls_ldm_got.refcount += 1;
1647 goto create_got;
1648
1649 case R_386_PLT32:
1650 /* This symbol requires a procedure linkage table entry. We
1651 actually build the entry in adjust_dynamic_symbol,
1652 because this might be a case of linking PIC code which is
1653 never referenced by a dynamic object, in which case we
1654 don't need to generate a procedure linkage table entry
1655 after all. */
1656
1657 /* If this is a local symbol, we resolve it directly without
1658 creating a procedure linkage table entry. */
1659 if (h == NULL)
1660 continue;
1661
aec6b87e 1662 eh->has_got_reloc = 1;
f5385ebf 1663 h->needs_plt = 1;
37e55690
JJ		 1664 h->plt.refcount += 1;
1665 break;
1666
6a3e1bae 1667 case R_386_SIZE32:
06a6a421 1668 size_reloc = TRUE;
6a3e1bae
L		 1669 goto do_size;
1670
13ae64f3 1671 case R_386_TLS_IE_32:
37e55690
JJ		 1672 case R_386_TLS_IE:
1673 case R_386_TLS_GOTIE:
0e1862bb 1674 if (!bfd_link_executable (info))
13ae64f3 1675 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1676 /* Fall through */
1677
252b5132 1678 case R_386_GOT32:
02a86693 1679 case R_386_GOT32X:
13ae64f3 1680 case R_386_TLS_GD:
67a4f2b7
AO		 1681 case R_386_TLS_GOTDESC:
1682 case R_386_TLS_DESC_CALL:
252b5132 1683 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1684 {
1685 int tls_type, old_tls_type;
1686
1687 switch (r_type)
1688 {
1689 default:
02a86693
L		 1690 case R_386_GOT32:
1691 case R_386_GOT32X:
1692 tls_type = GOT_NORMAL;
1693 break;
13ae64f3 1694 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1695 case R_386_TLS_GOTDESC:
1696 case R_386_TLS_DESC_CALL:
1697 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1698 case R_386_TLS_IE_32:
1699 if (ELF32_R_TYPE (rel->r_info) == r_type)
1700 tls_type = GOT_TLS_IE_NEG;
1701 else
ebcfb3c0
JJ		 1702 /* If this is a GD->IE transition, we may use either of
1703 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1704 tls_type = GOT_TLS_IE;
1705 break;
1706 case R_386_TLS_IE:
1707 case R_386_TLS_GOTIE:
1708 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1709 }
1710
1711 if (h != NULL)
1712 {
1713 h->got.refcount += 1;
1714 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1715 }
1716 else
1717 {
1718 bfd_signed_vma *local_got_refcounts;
1719
1720 /* This is a global offset table entry for a local symbol. */
1721 local_got_refcounts = elf_local_got_refcounts (abfd);
1722 if (local_got_refcounts == NULL)
1723 {
1724 bfd_size_type size;
1725
1726 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1727 size *= (sizeof (bfd_signed_vma)
1728 + sizeof (bfd_vma) + sizeof(char));
a50b1753
NC		 1729 local_got_refcounts = (bfd_signed_vma *)
1730 bfd_zalloc (abfd, size);
13ae64f3 1731 if (local_got_refcounts == NULL)
c2e61a4e 1732 return FALSE;
13ae64f3 1733 elf_local_got_refcounts (abfd) = local_got_refcounts;
67a4f2b7
AO		 1734 elf_i386_local_tlsdesc_gotent (abfd)
1735 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
13ae64f3 1736 elf_i386_local_got_tls_type (abfd)
67a4f2b7 1737 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3
JJ		 1738 }
1739 local_got_refcounts[r_symndx] += 1;
1740 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1741 }
1742
37e55690
JJ		 1743 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1744 tls_type |= old_tls_type;
13ae64f3
JJ		 1745 /* If a TLS symbol is accessed using IE at least once,
1746 there is no point to use dynamic model for it. */
ebcfb3c0 1747 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1748 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1749 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1750 {
67a4f2b7 1751 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1752 tls_type = old_tls_type;
67a4f2b7
AO		 1753 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1754 && GOT_TLS_GD_ANY_P (tls_type))
1755 tls_type |= old_tls_type;
13ae64f3
JJ		 1756 else
1757 {
09a24cbf 1758 if (h)
4c544807
L		 1759 name = h->root.root.string;
1760 else
1761 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1762 NULL);
13ae64f3 1763 (*_bfd_error_handler)
d003868e 1764 (_("%B: `%s' accessed both as normal and "
55fd94b0 1765 "thread local symbol"),
4c544807 1766 abfd, name);
68c4a57e 1767 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1768 return FALSE;
13ae64f3
JJ		 1769 }
1770 }
1771
1772 if (old_tls_type != tls_type)
1773 {
1774 if (h != NULL)
1775 elf_i386_hash_entry (h)->tls_type = tls_type;
1776 else
1777 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1778 }
1779 }
0ac8d2ca
AM		 1780 /* Fall through */
1781
1782 case R_386_GOTOFF:
1783 case R_386_GOTPC:
13ae64f3 1784 create_got:
6de2ae4a 1785 if (htab->elf.sgot == NULL)
0ac8d2ca
AM		 1786 {
1787 if (htab->elf.dynobj == NULL)
1788 htab->elf.dynobj = abfd;
6de2ae4a 1789 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
c2e61a4e 1790 return FALSE;
0ac8d2ca 1791 }
37e55690 1792 if (r_type != R_386_TLS_IE)
aec6b87e
L		 1793 {
1794 if (eh != NULL)
1795 eh->has_got_reloc = 1;
1796 break;
1797 }
37e55690 1798 /* Fall through */
252b5132 1799
37e55690
JJ		 1800 case R_386_TLS_LE_32:
1801 case R_386_TLS_LE:
aec6b87e
L		 1802 if (eh != NULL)
1803 eh->has_got_reloc = 1;
0e1862bb 1804 if (bfd_link_executable (info))
37e55690 1805 break;
bffbf940 1806 info->flags |= DF_STATIC_TLS;
aec6b87e 1807 goto do_relocation;
252b5132
RH		 1808
1809 case R_386_32:
1810 case R_386_PC32:
aec6b87e
L		 1811 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1812 eh->has_non_got_reloc = 1;
1813do_relocation:
d1ed1c7d
L		 1814 /* STT_GNU_IFUNC symbol must go through PLT even if it is
1815 locally defined and undefined symbol may turn out to be
1816 a STT_GNU_IFUNC symbol later. */
1817 if (h != NULL
1818 && (bfd_link_executable (info)
1819 || ((h->type == STT_GNU_IFUNC
1820 || h->root.type == bfd_link_hash_undefweak
1821 || h->root.type == bfd_link_hash_undefined)
1822 && SYMBOLIC_BIND (info, h))))
6725bdbf 1823 {
12d0ee4a 1824 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1825 need a copy reloc. We can't check reliably at this
1826 stage whether the section is read-only, as input
1827 sections have not yet been mapped to output sections.
1828 Tentatively set the flag for now, and correct in
1829 adjust_dynamic_symbol. */
f5385ebf 1830 h->non_got_ref = 1;
12d0ee4a
AM		 1831
1832 /* We may need a .plt entry if the function this reloc
1833 refers to is in a shared lib. */
51b64d56 1834 h->plt.refcount += 1;
4b627c18
L		 1835 if (r_type == R_386_PC32)
1836 {
1837 /* Since something like ".long foo - ." may be used
1838 as pointer, make sure that PLT is used if foo is
1839 a function defined in a shared library. */
1840 if ((sec->flags & SEC_CODE) == 0)
1841 h->pointer_equality_needed = 1;
1842 }
1843 else
04ebc307
L		 1844 {
1845 h->pointer_equality_needed = 1;
1846 /* R_386_32 can be resolved at run-time. */
1847 if (r_type == R_386_32
1848 && (sec->flags & SEC_READONLY) == 0)
1849 eh->func_pointer_refcount += 1;
1850 }
6725bdbf 1851 }
7843f00e 1852
06a6a421 1853 size_reloc = FALSE;
6a3e1bae 1854do_size:
252b5132 1855 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1856 against a global symbol, or a non PC relative reloc
1857 against a local symbol, then we need to copy the reloc
1858 into the shared library. However, if we are linking with
1859 -Bsymbolic, we do not need to copy a reloc against a
1860 global symbol which is defined in an object we are
1861 including in the link (i.e., DEF_REGULAR is set). At
1862 this point we have not seen all the input files, so it is
1863 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1864 later (it is never cleared). In case of a weak definition,
1865 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1866 a shared library. We account for that possibility below by
1f655a09
L		 1867 storing information in the relocs_copied field of the hash
1868 table entry. A similar situation occurs when creating
1869 shared libraries and symbol visibility changes render the
12d0ee4a 1870 symbol local.
56882138 1871
12d0ee4a
AM		 1872 If on the other hand, we are creating an executable, we
1873 may need to keep relocations for symbols satisfied by a
1874 dynamic library if we manage to avoid copy relocs for the
1875 symbol. */
0e1862bb 1876 if ((bfd_link_pic (info)
12d0ee4a 1877 && (sec->flags & SEC_ALLOC) != 0
13ae64f3 1878 && (r_type != R_386_PC32
12d0ee4a 1879 || (h != NULL
4e0c91e4
L		 1880 && (! (bfd_link_pie (info)
1881 || SYMBOLIC_BIND (info, h))
12d0ee4a 1882 || h->root.type == bfd_link_hash_defweak
f5385ebf 1883 || !h->def_regular))))
a23b6845 1884 || (ELIMINATE_COPY_RELOCS
0e1862bb 1885 && !bfd_link_pic (info)
12d0ee4a
AM		 1886 && (sec->flags & SEC_ALLOC) != 0
1887 && h != NULL
12d0ee4a 1888 && (h->root.type == bfd_link_hash_defweak
0f88be7a 1889 || !h->def_regular)))
252b5132 1890 {
e03a8ed8
L		 1891 struct elf_dyn_relocs *p;
1892 struct elf_dyn_relocs **head;
ec338859 1893
12d0ee4a
AM		 1894 /* We must copy these reloc types into the output file.
1895 Create a reloc section in dynobj and make room for
1896 this reloc. */
252b5132
RH		 1897 if (sreloc == NULL)
1898 {
0ac8d2ca
AM		 1899 if (htab->elf.dynobj == NULL)
1900 htab->elf.dynobj = abfd;
1901
83bac4b0
NC		 1902 sreloc = _bfd_elf_make_dynamic_reloc_section
1903 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1904
252b5132 1905 if (sreloc == NULL)
c2e61a4e 1906 return FALSE;
252b5132
RH		 1907 }
1908
0c715baa
AM		 1909 /* If this is a global symbol, we count the number of
1910 relocations we need for this symbol. */
1911 if (h != NULL)
252b5132 1912 {
d5597ebc 1913 head = &eh->dyn_relocs;
0c715baa
AM		 1914 }
1915 else
1916 {
ec338859
AM		 1917 /* Track dynamic relocs needed for local syms too.
1918 We really need local syms available to do this
1919 easily. Oh well. */
87d72d41 1920 void **vpp;
ec338859 1921 asection *s;
87d72d41
AM		 1922
1923 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1924 abfd, r_symndx);
1925 if (isym == NULL)
1926 return FALSE;
1927
1928 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1929 if (s == NULL)
87d72d41 1930 s = sec;
ec338859 1931
e81d3500 1932 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1933 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 1934 }
1935
1936 p = *head;
1937 if (p == NULL || p->sec != sec)
1938 {
1939 bfd_size_type amt = sizeof *p;
a50b1753
NC		 1940 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1941 amt);
ec338859 1942 if (p == NULL)
c2e61a4e 1943 return FALSE;
ec338859
AM		 1944 p->next = *head;
1945 *head = p;
1946 p->sec = sec;
1947 p->count = 0;
1948 p->pc_count = 0;
252b5132 1949 }
ec338859
AM		 1950
1951 p->count += 1;
06a6a421
L		 1952 /* Count size relocation as PC-relative relocation. */
1953 if (r_type == R_386_PC32 || size_reloc)
ec338859 1954 p->pc_count += 1;
252b5132 1955 }
252b5132
RH		 1956 break;
1957
1958 /* This relocation describes the C++ object vtable hierarchy.
1959 Reconstruct it for later use during GC. */
1960 case R_386_GNU_VTINHERIT:
d17e0c6e 1961 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 1962 return FALSE;
252b5132
RH		 1963 break;
1964
1965 /* This relocation describes which C++ vtable entries are actually
1966 used. Record for later use during GC. */
1967 case R_386_GNU_VTENTRY:
c6aa130f
MS		 1968 BFD_ASSERT (h != NULL);
1969 if (h != NULL
1970 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c2e61a4e 1971 return FALSE;
252b5132
RH		 1972 break;
1973
1974 default:
1975 break;
1976 }
dd7e64d4
L		 1977
1978 if (use_plt_got
1979 && h != NULL
1980 && h->plt.refcount > 0
8ded2ddc
L		 1981 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
1982 || h->got.refcount > 0)
dd7e64d4
L		 1983 && htab->plt_got == NULL)
1984 {
1985 /* Create the GOT procedure linkage table. */
1986 unsigned int plt_got_align;
1987 const struct elf_backend_data *bed;
1988
1989 bed = get_elf_backend_data (info->output_bfd);
1990 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1991 && (sizeof (elf_i386_got_plt_entry)
1992 == sizeof (elf_i386_pic_got_plt_entry)));
1993 plt_got_align = 3;
1994
1995 if (htab->elf.dynobj == NULL)
1996 htab->elf.dynobj = abfd;
1997 htab->plt_got
1998 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1999 ".plt.got",
2000 (bed->dynamic_sec_flags
2001 | SEC_ALLOC
2002 | SEC_CODE
2003 | SEC_LOAD
2004 | SEC_READONLY));
2005 if (htab->plt_got == NULL
2006 || !bfd_set_section_alignment (htab->elf.dynobj,
2007 htab->plt_got,
2008 plt_got_align))
2009 return FALSE;
2010 }
c1d11331 2011
02a86693 2012 if ((r_type == R_386_GOT32 || r_type == R_386_GOT32X)
c1d11331 2013 && (h == NULL || h->type != STT_GNU_IFUNC))
02a86693 2014 sec->need_convert_load = 1;
252b5132
RH		 2015 }
2016
b34976b6 2017 return TRUE;
252b5132
RH		 2018}
2019
2020/* Return the section that should be marked against GC for a given
2021 relocation. */
2022
2023static asection *
55fd94b0 2024elf_i386_gc_mark_hook (asection *sec,
07adf181 2025 struct bfd_link_info *info,
55fd94b0
AM		 2026 Elf_Internal_Rela *rel,
2027 struct elf_link_hash_entry *h,
2028 Elf_Internal_Sym *sym)
252b5132
RH		 2029{
2030 if (h != NULL)
07adf181
AM		 2031 switch (ELF32_R_TYPE (rel->r_info))
2032 {
2033 case R_386_GNU_VTINHERIT:
2034 case R_386_GNU_VTENTRY:
2035 return NULL;
2036 }
2037
2038 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132
RH		 2039}
2040
aec6b87e
L		 2041/* Remove undefined weak symbol from the dynamic symbol table if it
2042 is resolved to 0. */
2043
2044static bfd_boolean
2045elf_i386_fixup_symbol (struct bfd_link_info *info,
2046 struct elf_link_hash_entry *h)
2047{
2048 if (h->dynindx != -1
2049 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2050 elf_i386_hash_entry (h)))
2051 {
2052 h->dynindx = -1;
2053 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2054 h->dynstr_index);
2055 }
2056 return TRUE;
2057}
2058
252b5132
RH		 2059/* Adjust a symbol defined by a dynamic object and referenced by a
2060 regular object. The current definition is in some section of the
2061 dynamic object, but we're not including those sections. We have to
2062 change the definition to something the rest of the link can
2063 understand. */
2064
b34976b6 2065static bfd_boolean
55fd94b0
AM		 2066elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2067 struct elf_link_hash_entry *h)
252b5132 2068{
6725bdbf 2069 struct elf_i386_link_hash_table *htab;
252b5132 2070 asection *s;
5ca5bb35
L		 2071 struct elf_i386_link_hash_entry *eh;
2072 struct elf_dyn_relocs *p;
252b5132 2073
cbe950e9
L		 2074 /* STT_GNU_IFUNC symbol must go through PLT. */
2075 if (h->type == STT_GNU_IFUNC)
2076 {
73bcf233
L		 2077 /* All local STT_GNU_IFUNC references must be treate as local
2078 calls via local PLT. */
5ca5bb35
L		 2079 if (h->ref_regular
2080 && SYMBOL_CALLS_LOCAL (info, h))
2081 {
73bcf233 2082 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L		 2083 struct elf_dyn_relocs **pp;
2084
2085 eh = (struct elf_i386_link_hash_entry *) h;
2086 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2087 {
2088 pc_count += p->pc_count;
2089 p->count -= p->pc_count;
2090 p->pc_count = 0;
73bcf233 2091 count += p->count;
5ca5bb35
L		 2092 if (p->count == 0)
2093 *pp = p->next;
2094 else
2095 pp = &p->next;
2096 }
2097
73bcf233 2098 if (pc_count || count)
5ca5bb35
L		 2099 {
2100 h->needs_plt = 1;
5ca5bb35 2101 h->non_got_ref = 1;
a5479e5f
L		 2102 if (h->plt.refcount <= 0)
2103 h->plt.refcount = 1;
2104 else
2105 h->plt.refcount += 1;
5ca5bb35
L		 2106 }
2107 }
2108
cbe950e9
L		 2109 if (h->plt.refcount <= 0)
2110 {
2111 h->plt.offset = (bfd_vma) -1;
2112 h->needs_plt = 0;
2113 }
2114 return TRUE;
2115 }
2116
252b5132
RH		 2117 /* If this is a function, put it in the procedure linkage table. We
2118 will fill in the contents of the procedure linkage table later,
2119 when we know the address of the .got section. */
2120 if (h->type == STT_FUNC
f5385ebf 2121 || h->needs_plt)
252b5132 2122 {
6725bdbf 2123 if (h->plt.refcount <= 0
9c7a29a3
AM		 2124 || SYMBOL_CALLS_LOCAL (info, h)
2125 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2126 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2127 {
2128 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM		 2129 file, but the symbol was never referred to by a dynamic
2130 object, or if all references were garbage collected. In
2131 such a case, we don't actually need to build a procedure
2132 linkage table, and we can just do a PC32 reloc instead. */
bbd7ec4a 2133 h->plt.offset = (bfd_vma) -1;
f5385ebf 2134 h->needs_plt = 0;
252b5132
RH		 2135 }
2136
b34976b6 2137 return TRUE;
252b5132 2138 }
6725bdbf
AM		 2139 else
2140 /* It's possible that we incorrectly decided a .plt reloc was
2141 needed for an R_386_PC32 reloc to a non-function sym in
2142 check_relocs. We can't decide accurately between function and
2143 non-function syms in check-relocs; Objects loaded later in
2144 the link may change h->type. So fix it now. */
bbd7ec4a 2145 h->plt.offset = (bfd_vma) -1;
252b5132
RH		 2146
2147 /* If this is a weak symbol, and there is a real definition, the
2148 processor independent code will have arranged for us to see the
2149 real definition first, and we can just use the same value. */
f6e332e6 2150 if (h->u.weakdef != NULL)
252b5132 2151 {
f6e332e6
AM		 2152 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2153 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2154 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2155 h->root.u.def.value = h->u.weakdef->root.u.def.value;
a23b6845 2156 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 2157 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 2158 return TRUE;
252b5132
RH		 2159 }
2160
2161 /* This is a reference to a symbol defined by a dynamic object which
2162 is not a function. */
2163
2164 /* If we are creating a shared library, we must presume that the
2165 only references to the symbol are via the global offset table.
2166 For such cases we need not do anything here; the relocations will
2167 be handled correctly by relocate_section. */
0e1862bb 2168 if (!bfd_link_executable (info))
b34976b6 2169 return TRUE;
252b5132 2170
7843f00e 2171 /* If there are no references to this symbol that do not use the
d5597ebc
L		 2172 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2173 reloc. */
2174 eh = (struct elf_i386_link_hash_entry *) h;
2175 if (!h->non_got_ref && !eh->gotoff_ref)
b34976b6 2176 return TRUE;
7843f00e 2177
8bd621d8
AM		 2178 /* If -z nocopyreloc was given, we won't generate them either. */
2179 if (info->nocopyreloc)
2180 {
f5385ebf 2181 h->non_got_ref = 0;
b34976b6 2182 return TRUE;
8bd621d8
AM		 2183 }
2184
643796e3 2185 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 2186 if (htab == NULL)
2187 return FALSE;
643796e3 2188
d5597ebc
L		 2189 /* If there aren't any dynamic relocs in read-only sections nor
2190 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2191 avoid the copy reloc. This doesn't work on VxWorks, where we can
2192 not have dynamic relocations (other than copy and jump slot
2193 relocations) in an executable. */
23209a78 2194 if (ELIMINATE_COPY_RELOCS
d5597ebc 2195 && !eh->gotoff_ref
23209a78 2196 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
ebe50bae 2197 {
a23b6845
AM		 2198 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2199 {
2200 s = p->sec->output_section;
2201 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2202 break;
2203 }
2204
a23b6845
AM		 2205 if (p == NULL)
2206 {
f5385ebf 2207 h->non_got_ref = 0;
a23b6845
AM		 2208 return TRUE;
2209 }
ebe50bae
AM		 2210 }
2211
252b5132
RH		 2212 /* We must allocate the symbol in our .dynbss section, which will
2213 become part of the .bss section of the executable. There will be
2214 an entry for this symbol in the .dynsym section. The dynamic
2215 object will contain position independent code, so all references
2216 from the dynamic object to this symbol will go through the global
2217 offset table. The dynamic linker will use the .dynsym entry to
2218 determine the address it must put in the global offset table, so
2219 both the dynamic object and the regular object will refer to the
2220 same memory location for the variable. */
2221
252b5132
RH		 2222 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2223 copy the initial value out of the dynamic object and into the
0ac8d2ca 2224 runtime process image. */
1d7e9d18 2225 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
252b5132 2226 {
eea6121a 2227 htab->srelbss->size += sizeof (Elf32_External_Rel);
f5385ebf 2228 h->needs_copy = 1;
252b5132
RH		 2229 }
2230
0ac8d2ca 2231 s = htab->sdynbss;
252b5132 2232
6cabe1ea 2233 return _bfd_elf_adjust_dynamic_copy (info, h, s);
252b5132
RH		 2234}
2235
6725bdbf 2236/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 2237 dynamic relocs. */
6725bdbf 2238
b34976b6 2239static bfd_boolean
eb4ff4d6 2240elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 2241{
2242 struct bfd_link_info *info;
2243 struct elf_i386_link_hash_table *htab;
5a15f56f 2244 struct elf_i386_link_hash_entry *eh;
e03a8ed8 2245 struct elf_dyn_relocs *p;
25e762b9 2246 unsigned plt_entry_size;
aec6b87e 2247 bfd_boolean resolved_to_zero;
6725bdbf 2248
e92d460e 2249 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2250 return TRUE;
6725bdbf 2251
cbe950e9 2252 eh = (struct elf_i386_link_hash_entry *) h;
e92d460e 2253
6725bdbf
AM		 2254 info = (struct bfd_link_info *) inf;
2255 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 2256 if (htab == NULL)
2257 return FALSE;
6725bdbf 2258
25e762b9
RM		 2259 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2260
aec6b87e
L		 2261 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
2262
04ebc307
L		 2263 /* Clear the reference count of function pointer relocations if
2264 symbol isn't a normal function. */
2265 if (h->type != STT_FUNC)
2266 eh->func_pointer_refcount = 0;
2267
dd7e64d4
L		 2268 /* We can't use the GOT PLT if pointer equality is needed since
2269 finish_dynamic_symbol won't clear symbol value and the dynamic
2270 linker won't update the GOT slot. We will get into an infinite
2271 loop at run-time. */
2272 if (htab->plt_got != NULL
2273 && h->type != STT_GNU_IFUNC
2274 && !h->pointer_equality_needed
2275 && h->plt.refcount > 0
2276 && h->got.refcount > 0)
2277 {
2278 /* Don't use the regular PLT if there are both GOT and GOTPLT
2279 reloctions. */
2280 h->plt.offset = (bfd_vma) -1;
2281
2282 /* Use the GOT PLT. */
2283 eh->plt_got.refcount = 1;
2284 }
2285
cbe950e9
L		 2286 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2287 here if it is defined and referenced in a non-shared object. */
2288 if (h->type == STT_GNU_IFUNC
2289 && h->def_regular)
25e762b9 2290 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2df3368d
L		 2291 &htab->readonly_dynrelocs_against_ifunc,
2292 plt_entry_size,
7b70956d 2293 plt_entry_size, 4);
04ebc307
L		 2294 /* Don't create the PLT entry if there are only function pointer
2295 relocations which can be resolved at run-time. */
cbe950e9 2296 else if (htab->elf.dynamic_sections_created
04ebc307
L		 2297 && (h->plt.refcount > eh->func_pointer_refcount
2298 || eh->plt_got.refcount > 0))
6725bdbf 2299 {
25070364
L		 2300 bfd_boolean use_plt_got;
2301
04ebc307
L		 2302 /* Clear the reference count of function pointer relocations
2303 if PLT is used. */
2304 eh->func_pointer_refcount = 0;
2305
8ded2ddc 2306 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
25070364
L		 2307 {
2308 /* Don't use the regular PLT for DF_BIND_NOW. */
2309 h->plt.offset = (bfd_vma) -1;
2310
2311 /* Use the GOT PLT. */
2312 h->got.refcount = 1;
2313 eh->plt_got.refcount = 1;
2314 }
2315
2316 use_plt_got = eh->plt_got.refcount > 0;
dd7e64d4 2317
5a15f56f
AM		 2318 /* Make sure this symbol is output as a dynamic symbol.
2319 Undefined weak syms won't yet be marked as dynamic. */
2320 if (h->dynindx == -1
aec6b87e
L		 2321 && !h->forced_local
2322 && !resolved_to_zero)
5a15f56f 2323 {
c152c796 2324 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2325 return FALSE;
5a15f56f
AM		 2326 }
2327
0e1862bb 2328 if (bfd_link_pic (info)
4e795f50 2329 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 2330 {
6de2ae4a 2331 asection *s = htab->elf.splt;
dd7e64d4 2332 asection *got_s = htab->plt_got;
6725bdbf 2333
7c1e8d3e
L		 2334 /* If this is the first .plt entry, make room for the special
2335 first entry. The .plt section is used by prelink to undo
2336 prelinking for dynamic relocations. */
2337 if (s->size == 0)
2338 s->size = plt_entry_size;
2339
dd7e64d4
L		 2340 if (use_plt_got)
2341 eh->plt_got.offset = got_s->size;
2342 else
7c1e8d3e 2343 h->plt.offset = s->size;
6725bdbf 2344
ced53ee5
AM		 2345 /* If this symbol is not defined in a regular file, and we are
2346 not generating a shared library, then set the symbol to this
2347 location in the .plt. This is required to make function
2348 pointers compare as equal between the normal executable and
2349 the shared library. */
0e1862bb 2350 if (! bfd_link_pic (info)
f5385ebf 2351 && !h->def_regular)
ced53ee5 2352 {
dd7e64d4
L		 2353 if (use_plt_got)
2354 {
2355 /* We need to make a call to the entry of the GOT PLT
2356 instead of regular PLT entry. */
2357 h->root.u.def.section = got_s;
2358 h->root.u.def.value = eh->plt_got.offset;
2359 }
2360 else
2361 {
2362 h->root.u.def.section = s;
2363 h->root.u.def.value = h->plt.offset;
2364 }
ced53ee5 2365 }
6725bdbf 2366
ced53ee5 2367 /* Make room for this entry. */
dd7e64d4
L		 2368 if (use_plt_got)
2369 got_s->size += sizeof (elf_i386_got_plt_entry);
2370 else
2371 {
2372 s->size += plt_entry_size;
6725bdbf 2373
dd7e64d4
L		 2374 /* We also need to make an entry in the .got.plt section,
2375 which will be placed in the .got section by the linker
2376 script. */
2377 htab->elf.sgotplt->size += 4;
6725bdbf 2378
aec6b87e
L		 2379 /* There should be no PLT relocation against resolved
2380 undefined weak symbol in executable. */
2381 if (!resolved_to_zero)
2382 {
2383 /* We also need to make an entry in the .rel.plt
2384 section. */
2385 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2386 htab->elf.srelplt->reloc_count++;
2387 }
dd7e64d4 2388 }
eac338cf 2389
23209a78 2390 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
0e1862bb 2391 && !bfd_link_pic (info))
eac338cf
PB		 2392 {
2393 /* VxWorks has a second set of relocations for each PLT entry
2394 in executables. They go in a separate relocation section,
2395 which is processed by the kernel loader. */
2396
2397 /* There are two relocations for the initial PLT entry: an
2398 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2399 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2400
25e762b9 2401 if (h->plt.offset == plt_entry_size)
eac338cf
PB		 2402 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2403
2404 /* There are two extra relocations for each subsequent PLT entry:
2405 an R_386_32 relocation for the GOT entry, and an R_386_32
2406 relocation for the PLT entry. */
2407
2408 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2409 }
6725bdbf 2410 }
ced53ee5
AM		 2411 else
2412 {
13f42277 2413 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2414 h->plt.offset = (bfd_vma) -1;
f5385ebf 2415 h->needs_plt = 0;
ced53ee5 2416 }
6725bdbf
AM		 2417 }
2418 else
2419 {
13f42277 2420 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2421 h->plt.offset = (bfd_vma) -1;
f5385ebf 2422 h->needs_plt = 0;
6725bdbf
AM		 2423 }
2424
67a4f2b7
AO		 2425 eh->tlsdesc_got = (bfd_vma) -1;
2426
37e55690 2427 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 2428 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2429 if (h->got.refcount > 0
0e1862bb 2430 && bfd_link_executable (info)
13ae64f3 2431 && h->dynindx == -1
37e55690 2432 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
cedb70c5 2433 h->got.offset = (bfd_vma) -1;
13ae64f3 2434 else if (h->got.refcount > 0)
6725bdbf 2435 {
0ac8d2ca 2436 asection *s;
b34976b6 2437 bfd_boolean dyn;
13ae64f3 2438 int tls_type = elf_i386_hash_entry(h)->tls_type;
6725bdbf 2439
5a15f56f
AM		 2440 /* Make sure this symbol is output as a dynamic symbol.
2441 Undefined weak syms won't yet be marked as dynamic. */
2442 if (h->dynindx == -1
aec6b87e
L		 2443 && !h->forced_local
2444 && !resolved_to_zero)
5a15f56f 2445 {
c152c796 2446 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2447 return FALSE;
5a15f56f
AM		 2448 }
2449
6de2ae4a 2450 s = htab->elf.sgot;
67a4f2b7
AO		 2451 if (GOT_TLS_GDESC_P (tls_type))
2452 {
6de2ae4a 2453 eh->tlsdesc_got = htab->elf.sgotplt->size
67a4f2b7 2454 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2455 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 2456 h->got.offset = (bfd_vma) -2;
2457 }
2458 if (! GOT_TLS_GDESC_P (tls_type)
2459 || GOT_TLS_GD_P (tls_type))
2460 {
2461 h->got.offset = s->size;
2462 s->size += 4;
2463 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2464 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2465 s->size += 4;
2466 }
ebe50bae 2467 dyn = htab->elf.dynamic_sections_created;
13ae64f3 2468 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 2469 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2470 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2471 need two), R_386_TLS_GD needs one if local symbol and two if
aec6b87e
L		 2472 global. No dynamic relocation against resolved undefined weak
2473 symbol in executable. */
37e55690 2474 if (tls_type == GOT_TLS_IE_BOTH)
6de2ae4a 2475 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2476 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
37e55690 2477 || (tls_type & GOT_TLS_IE))
6de2ae4a 2478 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2479 else if (GOT_TLS_GD_P (tls_type))
6de2ae4a 2480 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2481 else if (! GOT_TLS_GDESC_P (tls_type)
aec6b87e
L		 2482 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2483 && !resolved_to_zero)
67a4f2b7 2484 || h->root.type != bfd_link_hash_undefweak)
0e1862bb 2485 && (bfd_link_pic (info)
ef5aade5 2486 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6de2ae4a 2487 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2488 if (GOT_TLS_GDESC_P (tls_type))
6de2ae4a 2489 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 2490 }
2491 else
51b64d56 2492 h->got.offset = (bfd_vma) -1;
6725bdbf 2493
5a15f56f 2494 if (eh->dyn_relocs == NULL)
b34976b6 2495 return TRUE;
5a15f56f 2496
0c715baa
AM		 2497 /* In the shared -Bsymbolic case, discard space allocated for
2498 dynamic pc-relative relocs against symbols which turn out to be
2499 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 2500 space for pc-relative relocs that have become local due to symbol
2501 visibility changes. */
0c715baa 2502
0e1862bb 2503 if (bfd_link_pic (info))
5a15f56f 2504 {
09695f56
AM		 2505 /* The only reloc that uses pc_count is R_386_PC32, which will
2506 appear on a call or on something like ".long foo - .". We
2507 want calls to protected symbols to resolve directly to the
2508 function rather than going via the plt. If people want
2509 function pointer comparisons to work as expected then they
2510 should avoid writing assembly like ".long foo - .". */
2511 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 2512 {
e03a8ed8 2513 struct elf_dyn_relocs **pp;
0c715baa
AM		 2514
2515 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2516 {
c3ce498c
L		 2517 p->count -= p->pc_count;
2518 p->pc_count = 0;
0c715baa
AM		 2519 if (p->count == 0)
2520 *pp = p->next;
2521 else
2522 pp = &p->next;
2523 }
5a15f56f 2524 }
4e795f50 2525
23209a78 2526 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
3348747a 2527 {
e03a8ed8 2528 struct elf_dyn_relocs **pp;
3348747a
NS		 2529 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2530 {
2531 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2532 *pp = p->next;
2533 else
2534 pp = &p->next;
2535 }
2536 }
2537
4e795f50 2538 /* Also discard relocs on undefined weak syms with non-default
aec6b87e 2539 visibility or in PIE. */
22d606e9 2540 if (eh->dyn_relocs != NULL
c353e543 2541 && h->root.type == bfd_link_hash_undefweak)
22d606e9 2542 {
aec6b87e
L		 2543 /* Undefined weak symbol is never bound locally in shared
2544 library. */
2545 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2546 || resolved_to_zero)
2547 {
2548 if (h->non_got_ref)
2549 {
2550 /* Keep dynamic non-GOT/non-PLT relocation so that we
2551 can branch to 0 without PLT. */
2552 struct elf_dyn_relocs **pp;
2553
2554 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2555 if (p->pc_count == 0)
2556 *pp = p->next;
2557 else
2558 {
2559 /* Remove non-R_386_PC32 relocation. */
2560 p->count = p->pc_count;
2561 pp = &p->next;
2562 }
22d606e9 2563
aec6b87e
L		 2564 if (eh->dyn_relocs != NULL)
2565 {
2566 /* Make sure undefined weak symbols are output
2567 as dynamic symbols in PIEs for dynamic non-GOT
2568 non-PLT reloations. */
2569 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2570 return FALSE;
2571 }
2572 }
2573 else
2574 eh->dyn_relocs = NULL;
2575 }
22d606e9
AM		 2576 else if (h->dynindx == -1
2577 && !h->forced_local)
2578 {
2579 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2580 return FALSE;
2581 }
2582 }
0c715baa 2583 }
a23b6845 2584 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 2585 {
2586 /* For the non-shared case, discard space for relocs against
2587 symbols which turn out to need copy relocs or are not
04ebc307
L		 2588 dynamic. Keep dynamic relocations for run-time function
2589 pointer initialization. */
0c715baa 2590
aec6b87e
L		 2591 if ((!h->non_got_ref
2592 || eh->func_pointer_refcount > 0
2593 || (h->root.type == bfd_link_hash_undefweak
2594 && !resolved_to_zero))
f5385ebf
AM		 2595 && ((h->def_dynamic
2596 && !h->def_regular)
ebe50bae 2597 || (htab->elf.dynamic_sections_created
0c715baa
AM		 2598 && (h->root.type == bfd_link_hash_undefweak
2599 || h->root.type == bfd_link_hash_undefined))))
2600 {
2601 /* Make sure this symbol is output as a dynamic symbol.
2602 Undefined weak syms won't yet be marked as dynamic. */
2603 if (h->dynindx == -1
aec6b87e
L		 2604 && !h->forced_local
2605 && !resolved_to_zero)
0c715baa 2606 {
c152c796 2607 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2608 return FALSE;
0c715baa 2609 }
5a15f56f 2610
0c715baa
AM		 2611 /* If that succeeded, we know we'll be keeping all the
2612 relocs. */
2613 if (h->dynindx != -1)
2614 goto keep;
2615 }
2616
2617 eh->dyn_relocs = NULL;
04ebc307 2618 eh->func_pointer_refcount = 0;
0c715baa 2619
ec338859 2620 keep: ;
5a15f56f
AM		 2621 }
2622
0c715baa
AM		 2623 /* Finally, allocate space. */
2624 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 2625 {
e7c33416
NC		 2626 asection *sreloc;
2627
cbe950e9 2628 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2629
2630 BFD_ASSERT (sreloc != NULL);
eea6121a 2631 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 2632 }
2633
b34976b6 2634 return TRUE;
6725bdbf
AM		 2635}
2636
c25bc9fc
L		 2637/* Allocate space in .plt, .got and associated reloc sections for
2638 local dynamic relocs. */
2639
2640static bfd_boolean
2641elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2642{
2643 struct elf_link_hash_entry *h
2644 = (struct elf_link_hash_entry *) *slot;
2645
2646 if (h->type != STT_GNU_IFUNC
2647 || !h->def_regular
2648 || !h->ref_regular
2649 || !h->forced_local
2650 || h->root.type != bfd_link_hash_defined)
2651 abort ();
2652
2653 return elf_i386_allocate_dynrelocs (h, inf);
2654}
2655
0c715baa
AM		 2656/* Find any dynamic relocs that apply to read-only sections. */
2657
b34976b6 2658static bfd_boolean
eb4ff4d6 2659elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
0c715baa
AM		 2660{
2661 struct elf_i386_link_hash_entry *eh;
e03a8ed8 2662 struct elf_dyn_relocs *p;
0c715baa 2663
aa715242
L		 2664 /* Skip local IFUNC symbols. */
2665 if (h->forced_local && h->type == STT_GNU_IFUNC)
2666 return TRUE;
2667
0c715baa
AM		 2668 eh = (struct elf_i386_link_hash_entry *) h;
2669 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2670 {
2671 asection *s = p->sec->output_section;
2672
2673 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2674 {
2675 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2676
2677 info->flags |= DF_TEXTREL;
2678
0e1862bb 2679 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd
L		 2680 || info->error_textrel)
2681 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
b70321a2
L		 2682 p->sec->owner, h->root.root.string,
2683 p->sec);
2684
0c715baa 2685 /* Not an error, just cut short the traversal. */
b34976b6 2686 return FALSE;
0c715baa
AM		 2687 }
2688 }
b34976b6 2689 return TRUE;
0c715baa
AM		 2690}
2691
02a86693
L		 2692/* With the local symbol, foo, we convert
2693 mov foo@GOT[(%reg1)], %reg2
2694 to
2695 lea foo[@GOTOFF(%reg1)], %reg2
2696 and convert
2697 call/jmp *foo@GOT[(%reg)]
daa67607 2698 to
02a86693
L		 2699 nop call foo/jmp foo nop
2700 When PIC is false, convert
2701 test %reg1, foo@GOT[(%reg2)]
2702 to
2703 test $foo, %reg1
2704 and convert
2705 binop foo@GOT[(%reg1)], %reg2
2706 to
2707 binop $foo, %reg2
2708 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
2709 instructions. */
daa67607
L		 2710
2711static bfd_boolean
02a86693 2712elf_i386_convert_load (bfd *abfd, asection *sec,
a6af384b 2713 struct bfd_link_info *link_info)
daa67607
L		 2714{
2715 Elf_Internal_Shdr *symtab_hdr;
2716 Elf_Internal_Rela *internal_relocs;
2717 Elf_Internal_Rela *irel, *irelend;
2718 bfd_byte *contents;
2719 struct elf_i386_link_hash_table *htab;
2720 bfd_boolean changed_contents;
2721 bfd_boolean changed_relocs;
bae420ef 2722 bfd_boolean is_pic;
daa67607
L		 2723 bfd_signed_vma *local_got_refcounts;
2724
2725 /* Don't even try to convert non-ELF outputs. */
2726 if (!is_elf_hash_table (link_info->hash))
2727 return FALSE;
2728
c1d11331 2729 /* Nothing to do if there is no need or no output. */
daa67607 2730 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
02a86693 2731 || sec->need_convert_load == 0
c8831961 2732 || bfd_is_abs_section (sec->output_section))
daa67607
L		 2733 return TRUE;
2734
2735 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2736
2737 /* Load the relocations for this section. */
2738 internal_relocs = (_bfd_elf_link_read_relocs
2739 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2740 link_info->keep_memory));
2741 if (internal_relocs == NULL)
2742 return FALSE;
2743
2744 htab = elf_i386_hash_table (link_info);
2745 changed_contents = FALSE;
2746 changed_relocs = FALSE;
2747 local_got_refcounts = elf_local_got_refcounts (abfd);
2748
bae420ef
L		 2749 is_pic = bfd_link_pic (link_info);
2750
daa67607
L		 2751 /* Get the section contents. */
2752 if (elf_section_data (sec)->this_hdr.contents != NULL)
2753 contents = elf_section_data (sec)->this_hdr.contents;
2754 else
2755 {
2756 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2757 goto error_return;
2758 }
2759
2760 irelend = internal_relocs + sec->reloc_count;
2761 for (irel = internal_relocs; irel < irelend; irel++)
2762 {
2763 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2764 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2765 unsigned int indx;
2766 struct elf_link_hash_entry *h;
02a86693
L		 2767 unsigned int opcode;
2768 unsigned int modrm;
2769 bfd_vma roff;
2770 bfd_boolean baseless;
2771 Elf_Internal_Sym *isym;
2772 unsigned int addend;
2773 unsigned int nop;
2774 bfd_vma nop_offset;
bae420ef 2775 bfd_boolean to_reloc_32;
daa67607 2776
02a86693 2777 if (r_type != R_386_GOT32 && r_type != R_386_GOT32X)
daa67607
L		 2778 continue;
2779
02a86693
L		 2780 roff = irel->r_offset;
2781 if (roff < 2)
2782 continue;
2783
02e2aef8
L		 2784 /* Addend for R_386_GOT32 and R_386_GOT32X relocations must be 0. */
2785 addend = bfd_get_32 (abfd, contents + roff);
2786 if (addend != 0)
2787 continue;
2788
02a86693
L		 2789 modrm = bfd_get_8 (abfd, contents + roff - 1);
2790 baseless = (modrm & 0xc7) == 0x5;
2791
bae420ef 2792 if (r_type == R_386_GOT32X && baseless && is_pic)
daa67607 2793 {
02a86693
L		 2794 /* For PIC, disallow R_386_GOT32X without a base register
2795 since we don't know what the GOT base is. Allow
2796 R_386_GOT32 for existing object files. */
2797 const char *name;
2798
2799 if (r_symndx < symtab_hdr->sh_info)
2800 {
2801 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
2802 r_symndx);
2803 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2804 }
2805 else
2806 {
2807 indx = r_symndx - symtab_hdr->sh_info;
2808 h = elf_sym_hashes (abfd)[indx];
2809 BFD_ASSERT (h != NULL);
2810 name = h->root.root.string;
2811 }
2812
2813 (*_bfd_error_handler)
2814 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"),
2815 abfd, name);
2816 goto error_return;
2817 }
daa67607 2818
02a86693
L		 2819 opcode = bfd_get_8 (abfd, contents + roff - 2);
2820
bae420ef 2821 /* Convert mov to lea since it has been done for a while. */
02a86693
L		 2822 if (opcode != 0x8b)
2823 {
2824 /* Only convert R_386_GOT32X relocation for call, jmp or
2825 one of adc, add, and, cmp, or, sbb, sub, test, xor
2826 instructions. */
2827 if (r_type != R_386_GOT32X)
2828 continue;
02a86693
L		 2829 }
2830
bae420ef
L		 2831 /* Convert to R_386_32 if PIC is false or there is no base
2832 register. */
2833 to_reloc_32 = !is_pic || baseless;
2834
02a86693
L		 2835 /* Try to convert R_386_GOT32 and R_386_GOT32X. Get the symbol
2836 referred to by the reloc. */
2837 if (r_symndx < symtab_hdr->sh_info)
2838 {
daa67607
L		 2839 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2840 abfd, r_symndx);
2841
02a86693
L		 2842 /* STT_GNU_IFUNC must keep GOT32 relocations. */
2843 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2844 continue;
2845
2846 h = NULL;
2847 if (opcode == 0x0ff)
2848 /* Convert "call/jmp *foo@GOT[(%reg)]". */
2849 goto convert_branch;
2850 else
2851 /* Convert "mov foo@GOT[(%reg1)], %reg2",
2852 "test %reg1, foo@GOT(%reg2)" and
2853 "binop foo@GOT[(%reg1)], %reg2". */
2854 goto convert_load;
daa67607
L		 2855 }
2856
2857 indx = r_symndx - symtab_hdr->sh_info;
2858 h = elf_sym_hashes (abfd)[indx];
2859 BFD_ASSERT (h != NULL);
2860
2861 while (h->root.type == bfd_link_hash_indirect
2862 || h->root.type == bfd_link_hash_warning)
2863 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2864
02a86693
L		 2865 /* STT_GNU_IFUNC must keep GOT32 relocations. */
2866 if (h->type == STT_GNU_IFUNC)
2867 continue;
2868
bae420ef
L		 2869 /* Undefined weak symbol is only bound locally in executable
2870 and its reference is resolved as 0. */
2871 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
2872 elf_i386_hash_entry (h)))
2873 {
2874 if (opcode == 0xff)
2875 {
2876 /* No direct branch to 0 for PIC. */
2877 if (is_pic)
2878 continue;
2879 else
2880 goto convert_branch;
2881 }
2882 else
2883 {
2884 /* We can convert load of address 0 to R_386_32. */
2885 to_reloc_32 = TRUE;
2886 goto convert_load;
2887 }
2888 }
2889
02a86693
L		 2890 if (opcode == 0xff)
2891 {
2892 /* We have "call/jmp *foo@GOT[(%reg)]". */
2893 if ((h->root.type == bfd_link_hash_defined
2894 || h->root.type == bfd_link_hash_defweak)
2895 && SYMBOL_REFERENCES_LOCAL (link_info, h))
2896 {
2897 /* The function is locally defined. */
2898convert_branch:
02a86693
L		 2899 /* Convert R_386_GOT32X to R_386_PC32. */
2900 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
2901 {
2902 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
2903 is a nop prefix. */
2904 modrm = 0xe8;
caa65211
L		 2905 nop = link_info->call_nop_byte;
2906 if (link_info->call_nop_as_suffix)
2907 {
2908 nop_offset = roff + 3;
2909 irel->r_offset -= 1;
2910 }
2911 else
2912 nop_offset = roff - 2;
02a86693
L		 2913 }
2914 else
2915 {
2916 /* Convert to "jmp foo nop". */
2917 modrm = 0xe9;
2918 nop = NOP_OPCODE;
2919 nop_offset = roff + 3;
2920 irel->r_offset -= 1;
2921 }
2922
2923 bfd_put_8 (abfd, nop, contents + nop_offset);
2924 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
2925 /* When converting to PC-relative relocation, we
2926 need to adjust addend by -4. */
2927 bfd_put_32 (abfd, -4, contents + irel->r_offset);
2928 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
2929
2930 if (h)
2931 {
2932 if (h->got.refcount > 0)
2933 h->got.refcount -= 1;
2934 }
2935 else
2936 {
2937 if (local_got_refcounts != NULL
2938 && local_got_refcounts[r_symndx] > 0)
2939 local_got_refcounts[r_symndx] -= 1;
2940 }
2941
2942 changed_contents = TRUE;
2943 changed_relocs = TRUE;
2944 }
2945 }
2946 else
daa67607 2947 {
02a86693
L		 2948 /* We have "mov foo@GOT[(%re1g)], %reg2",
2949 "test %reg1, foo@GOT(%reg2)" and
2950 "binop foo@GOT[(%reg1)], %reg2".
2951
2952 Avoid optimizing _DYNAMIC since ld.so may use its
2953 link-time address. */
2954 if (h == htab->elf.hdynamic)
2955 continue;
2956
ead3d542
L		 2957 /* def_regular is set by an assignment in a linker script in
2958 bfd_elf_record_link_assignment. */
2959 if ((h->def_regular
2960 || h->root.type == bfd_link_hash_defined
2961 || h->root.type == bfd_link_hash_defweak)
02a86693
L		 2962 && SYMBOL_REFERENCES_LOCAL (link_info, h))
2963 {
2964convert_load:
2965 if (opcode == 0x8b)
2966 {
bae420ef 2967 if (to_reloc_32)
02a86693 2968 {
bae420ef
L		 2969 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
2970 "mov $foo, %reg2" with R_386_32. */
02a86693 2971 r_type = R_386_32;
bae420ef
L		 2972 modrm = 0xc0 | (modrm & 0x38) >> 3;
2973 bfd_put_8 (abfd, modrm, contents + roff - 1);
2974 opcode = 0xc7;
02a86693
L		 2975 }
2976 else
bae420ef
L		 2977 {
2978 /* Convert "mov foo@GOT(%reg1), %reg2" to
2979 "lea foo@GOTOFF(%reg1), %reg2". */
2980 r_type = R_386_GOTOFF;
2981 opcode = 0x8d;
2982 }
02a86693
L		 2983 }
2984 else
2985 {
bae420ef
L		 2986 /* Only R_386_32 is supported. */
2987 if (!to_reloc_32)
2988 continue;
2989
02a86693
L		 2990 if (opcode == 0x85)
2991 {
2992 /* Convert "test %reg1, foo@GOT(%reg2)" to
2993 "test $foo, %reg1". */
2994 modrm = 0xc0 | (modrm & 0x38) >> 3;
2995 opcode = 0xf7;
2996 }
2997 else
2998 {
2999 /* Convert "binop foo@GOT(%reg1), %reg2" to
3000 "binop $foo, %reg2". */
3001 modrm = (0xc0
3002 | (modrm & 0x38) >> 3
3003 | (opcode & 0x3c));
3004 opcode = 0x81;
3005 }
3006 bfd_put_8 (abfd, modrm, contents + roff - 1);
3007 r_type = R_386_32;
3008 }
3009
3010 bfd_put_8 (abfd, opcode, contents + roff - 2);
3011 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
3012
3013 if (h)
3014 {
3015 if (h->got.refcount > 0)
3016 h->got.refcount -= 1;
3017 }
3018 else
3019 {
3020 if (local_got_refcounts != NULL
3021 && local_got_refcounts[r_symndx] > 0)
3022 local_got_refcounts[r_symndx] -= 1;
3023 }
3024
3025 changed_contents = TRUE;
3026 changed_relocs = TRUE;
3027 }
daa67607
L		 3028 }
3029 }
3030
3031 if (contents != NULL
3032 && elf_section_data (sec)->this_hdr.contents != contents)
3033 {
3034 if (!changed_contents && !link_info->keep_memory)
3035 free (contents);
3036 else
3037 {
3038 /* Cache the section contents for elf_link_input_bfd. */
3039 elf_section_data (sec)->this_hdr.contents = contents;
3040 }
3041 }
3042
3043 if (elf_section_data (sec)->relocs != internal_relocs)
3044 {
3045 if (!changed_relocs)
3046 free (internal_relocs);
3047 else
3048 elf_section_data (sec)->relocs = internal_relocs;
3049 }
3050
3051 return TRUE;
3052
3053 error_return:
3054 if (contents != NULL
3055 && elf_section_data (sec)->this_hdr.contents != contents)
3056 free (contents);
3057 if (internal_relocs != NULL
3058 && elf_section_data (sec)->relocs != internal_relocs)
3059 free (internal_relocs);
3060 return FALSE;
3061}
3062
252b5132
RH		 3063/* Set the sizes of the dynamic sections. */
3064
b34976b6 3065static bfd_boolean
23209a78 3066elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
252b5132 3067{
6725bdbf 3068 struct elf_i386_link_hash_table *htab;
252b5132
RH		 3069 bfd *dynobj;
3070 asection *s;
b34976b6 3071 bfd_boolean relocs;
0c715baa 3072 bfd *ibfd;
252b5132 3073
6725bdbf 3074 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 3075 if (htab == NULL)
3076 return FALSE;
ebe50bae 3077 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 3078 if (dynobj == NULL)
3079 abort ();
252b5132 3080
ebe50bae 3081 if (htab->elf.dynamic_sections_created)
252b5132
RH		 3082 {
3083 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 3084 if (bfd_link_executable (info) && !info->nointerp)
252b5132 3085 {
3d4d4302 3086 s = bfd_get_linker_section (dynobj, ".interp");
ffb2e45b
AM		 3087 if (s == NULL)
3088 abort ();
eea6121a 3089 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132 3090 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
aec6b87e 3091 htab->interp = s;
252b5132 3092 }
161d71a6 3093 }
6725bdbf 3094
0c715baa
AM		 3095 /* Set up .got offsets for local syms, and space for local dynamic
3096 relocs. */
c72f2fb2 3097 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
161d71a6
L		 3098 {
3099 bfd_signed_vma *local_got;
3100 bfd_signed_vma *end_local_got;
13ae64f3 3101 char *local_tls_type;
67a4f2b7 3102 bfd_vma *local_tlsdesc_gotent;
161d71a6
L		 3103 bfd_size_type locsymcount;
3104 Elf_Internal_Shdr *symtab_hdr;
3105 asection *srel;
6725bdbf 3106
0ffa91dd 3107 if (! is_i386_elf (ibfd))
161d71a6 3108 continue;
6725bdbf 3109
0c715baa
AM		 3110 for (s = ibfd->sections; s != NULL; s = s->next)
3111 {
e03a8ed8 3112 struct elf_dyn_relocs *p;
0c715baa 3113
02a86693 3114 if (!elf_i386_convert_load (ibfd, s, info))
daa67607
L		 3115 return FALSE;
3116
e03a8ed8 3117 for (p = ((struct elf_dyn_relocs *)
e81d3500 3118 elf_section_data (s)->local_dynrel);
ec338859
AM		 3119 p != NULL;
3120 p = p->next)
0c715baa 3121 {
ec338859
AM		 3122 if (!bfd_is_abs_section (p->sec)
3123 && bfd_is_abs_section (p->sec->output_section))
3124 {
3125 /* Input section has been discarded, either because
3126 it is a copy of a linkonce section or due to
3127 linker script /DISCARD/, so we'll be discarding
3128 the relocs too. */
3129 }
23209a78 3130 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3348747a
NS		 3131 && strcmp (p->sec->output_section->name,
3132 ".tls_vars") == 0)
3133 {
3134 /* Relocations in vxworks .tls_vars sections are
3135 handled specially by the loader. */
3136 }
248866a8 3137 else if (p->count != 0)
ec338859
AM		 3138 {
3139 srel = elf_section_data (p->sec)->sreloc;
eea6121a 3140 srel->size += p->count * sizeof (Elf32_External_Rel);
4b819e1f
L		 3141 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3142 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 3143 {
3144 info->flags |= DF_TEXTREL;
0e1862bb 3145 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd
L		 3146 || info->error_textrel)
3147 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
b70321a2 3148 p->sec->owner, p->sec);
b70321a2 3149 }
ec338859 3150 }
0c715baa
AM		 3151 }
3152 }
3153
3154 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 3155 if (!local_got)
3156 continue;
6725bdbf 3157
0ffa91dd 3158 symtab_hdr = &elf_symtab_hdr (ibfd);
161d71a6
L		 3159 locsymcount = symtab_hdr->sh_info;
3160 end_local_got = local_got + locsymcount;
13ae64f3 3161 local_tls_type = elf_i386_local_got_tls_type (ibfd);
67a4f2b7 3162 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 3163 s = htab->elf.sgot;
3164 srel = htab->elf.srelgot;
67a4f2b7
AO		 3165 for (; local_got < end_local_got;
3166 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
161d71a6 3167 {
67a4f2b7 3168 *local_tlsdesc_gotent = (bfd_vma) -1;
161d71a6 3169 if (*local_got > 0)
6725bdbf 3170 {
67a4f2b7
AO		 3171 if (GOT_TLS_GDESC_P (*local_tls_type))
3172 {
6de2ae4a 3173 *local_tlsdesc_gotent = htab->elf.sgotplt->size
67a4f2b7 3174 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 3175 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 3176 *local_got = (bfd_vma) -2;
3177 }
3178 if (! GOT_TLS_GDESC_P (*local_tls_type)
3179 || GOT_TLS_GD_P (*local_tls_type))
3180 {
3181 *local_got = s->size;
3182 s->size += 4;
3183 if (GOT_TLS_GD_P (*local_tls_type)
3184 || *local_tls_type == GOT_TLS_IE_BOTH)
3185 s->size += 4;
3186 }
0e1862bb 3187 if (bfd_link_pic (info)
67a4f2b7 3188 || GOT_TLS_GD_ANY_P (*local_tls_type)
37e55690
JJ		 3189 || (*local_tls_type & GOT_TLS_IE))
3190 {
3191 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 3192 srel->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 3193 else if (GOT_TLS_GD_P (*local_tls_type)
3194 || ! GOT_TLS_GDESC_P (*local_tls_type))
eea6121a 3195 srel->size += sizeof (Elf32_External_Rel);
67a4f2b7 3196 if (GOT_TLS_GDESC_P (*local_tls_type))
6de2ae4a 3197 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
37e55690 3198 }
6725bdbf 3199 }
161d71a6
L		 3200 else
3201 *local_got = (bfd_vma) -1;
6725bdbf 3202 }
252b5132 3203 }
6725bdbf 3204
13ae64f3
JJ		 3205 if (htab->tls_ldm_got.refcount > 0)
3206 {
3207 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3208 relocs. */
6de2ae4a
L		 3209 htab->tls_ldm_got.offset = htab->elf.sgot->size;
3210 htab->elf.sgot->size += 8;
3211 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 3212 }
3213 else
3214 htab->tls_ldm_got.offset = -1;
3215
0c715baa
AM		 3216 /* Allocate global sym .plt and .got entries, and space for global
3217 sym dynamic relocs. */
eb4ff4d6 3218 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
252b5132 3219
c25bc9fc
L		 3220 /* Allocate .plt and .got entries, and space for local symbols. */
3221 htab_traverse (htab->loc_hash_table,
3222 elf_i386_allocate_local_dynrelocs,
3223 info);
3224
67a4f2b7
AO		 3225 /* For every jump slot reserved in the sgotplt, reloc_count is
3226 incremented. However, when we reserve space for TLS descriptors,
3227 it's not incremented, so in order to compute the space reserved
3228 for them, it suffices to multiply the reloc count by the jump
e1f98742 3229 slot size.
caa0075c 3230
e1f98742
L		 3231 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3232 so that R_386_IRELATIVE entries come last. */
6de2ae4a 3233 if (htab->elf.srelplt)
e1f98742
L		 3234 {
3235 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
3236 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
3237 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3238 }
3239 else if (htab->elf.irelplt)
3240 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3241
67a4f2b7 3242
a7b16ceb
L		 3243 if (htab->elf.sgotplt)
3244 {
3245 /* Don't allocate .got.plt section if there are no GOT nor PLT
9a2a56cc 3246 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 3247 if ((htab->elf.hgot == NULL
3248 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 3249 && (htab->elf.sgotplt->size
3250 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 3251 && (htab->elf.splt == NULL
3252 || htab->elf.splt->size == 0)
3253 && (htab->elf.sgot == NULL
3254 || htab->elf.sgot->size == 0)
3255 && (htab->elf.iplt == NULL
3256 || htab->elf.iplt->size == 0)
3257 && (htab->elf.igotplt == NULL
3258 || htab->elf.igotplt->size == 0))
3259 htab->elf.sgotplt->size = 0;
3260 }
3261
9a2a56cc
AM		 3262
3263 if (htab->plt_eh_frame != NULL
3264 && htab->elf.splt != NULL
3265 && htab->elf.splt->size != 0
3266 && !bfd_is_abs_section (htab->elf.splt->output_section)
3267 && _bfd_elf_eh_frame_present (info))
3268 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3269
5a15f56f
AM		 3270 /* We now have determined the sizes of the various dynamic sections.
3271 Allocate memory for them. */
b34976b6 3272 relocs = FALSE;
252b5132
RH		 3273 for (s = dynobj->sections; s != NULL; s = s->next)
3274 {
eac338cf
PB		 3275 bfd_boolean strip_section = TRUE;
3276
252b5132
RH		 3277 if ((s->flags & SEC_LINKER_CREATED) == 0)
3278 continue;
3279
6de2ae4a 3280 if (s == htab->elf.splt
9a2a56cc 3281 || s == htab->elf.sgot)
252b5132 3282 {
6725bdbf
AM		 3283 /* Strip this section if we don't need it; see the
3284 comment below. */
eac338cf
PB		 3285 /* We'd like to strip these sections if they aren't needed, but if
3286 we've exported dynamic symbols from them we must leave them.
3287 It's too late to tell BFD to get rid of the symbols. */
3288
7325306f 3289 if (htab->elf.hplt != NULL)
eac338cf 3290 strip_section = FALSE;
252b5132 3291 }
9a2a56cc
AM		 3292 else if (s == htab->elf.sgotplt
3293 || s == htab->elf.iplt
3294 || s == htab->elf.igotplt
dd7e64d4 3295 || s == htab->plt_got
9a2a56cc
AM		 3296 || s == htab->plt_eh_frame
3297 || s == htab->sdynbss)
3298 {
3299 /* Strip these too. */
3300 }
0112cd26 3301 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
252b5132 3302 {
6de2ae4a
L		 3303 if (s->size != 0
3304 && s != htab->elf.srelplt
3305 && s != htab->srelplt2)
b34976b6 3306 relocs = TRUE;
252b5132 3307
0ac8d2ca
AM		 3308 /* We use the reloc_count field as a counter if we need
3309 to copy relocs into the output file. */
5ae0bfb6 3310 s->reloc_count = 0;
252b5132 3311 }
6725bdbf 3312 else
252b5132
RH		 3313 {
3314 /* It's not one of our sections, so don't allocate space. */
3315 continue;
3316 }
3317
c456f082 3318 if (s->size == 0)
252b5132 3319 {
0ac8d2ca
AM		 3320 /* If we don't need this section, strip it from the
3321 output file. This is mostly to handle .rel.bss and
3322 .rel.plt. We must create both sections in
3323 create_dynamic_sections, because they must be created
3324 before the linker maps input sections to output
3325 sections. The linker does that before
3326 adjust_dynamic_symbol is called, and it is that
3327 function which decides whether anything needs to go
3328 into these sections. */
c456f082
AM		 3329 if (strip_section)
3330 s->flags |= SEC_EXCLUDE;
252b5132
RH		 3331 continue;
3332 }
3333
c456f082
AM		 3334 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3335 continue;
3336
f69da49f
AM		 3337 /* Allocate memory for the section contents. We use bfd_zalloc
3338 here in case unused entries are not reclaimed before the
3339 section's contents are written out. This should not happen,
3340 but this way if it does, we get a R_386_NONE reloc instead
3341 of garbage. */
a50b1753 3342 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
6725bdbf 3343 if (s->contents == NULL)
b34976b6 3344 return FALSE;
252b5132
RH		 3345 }
3346
e41b3a13 3347 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 3348 && htab->plt_eh_frame->contents != NULL)
3349 {
3350 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3351 sizeof (elf_i386_eh_frame_plt));
3352 bfd_put_32 (dynobj, htab->elf.splt->size,
3353 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3354 }
e41b3a13 3355
ebe50bae 3356 if (htab->elf.dynamic_sections_created)
252b5132
RH		 3357 {
3358 /* Add some entries to the .dynamic section. We fill in the
3359 values later, in elf_i386_finish_dynamic_sections, but we
3360 must add the entries now so that we get the correct size for
3361 the .dynamic section. The DT_DEBUG entry is filled in by the
3362 dynamic linker and used by the debugger. */
dc810e39 3363#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3364 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3365
0e1862bb 3366 if (bfd_link_executable (info))
252b5132 3367 {
dc810e39 3368 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3369 return FALSE;
252b5132
RH		 3370 }
3371
6de2ae4a 3372 if (htab->elf.splt->size != 0)
252b5132 3373 {
7c1e8d3e
L		 3374 /* DT_PLTGOT is used by prelink even if there is no PLT
3375 relocation. */
3376 if (!add_dynamic_entry (DT_PLTGOT, 0))
b34976b6 3377 return FALSE;
7c1e8d3e
L		 3378
3379 if (htab->elf.srelplt->size != 0)
3380 {
3381 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3382 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3383 || !add_dynamic_entry (DT_JMPREL, 0))
3384 return FALSE;
3385 }
252b5132
RH		 3386 }
3387
3388 if (relocs)
3389 {
dc810e39
AM		 3390 if (!add_dynamic_entry (DT_REL, 0)
3391 || !add_dynamic_entry (DT_RELSZ, 0)
3392 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 3393 return FALSE;
252b5132 3394
0c715baa
AM		 3395 /* If any dynamic relocs apply to a read-only section,
3396 then we need a DT_TEXTREL entry. */
248866a8 3397 if ((info->flags & DF_TEXTREL) == 0)
eb4ff4d6
L		 3398 elf_link_hash_traverse (&htab->elf,
3399 elf_i386_readonly_dynrelocs, info);
0c715baa
AM		 3400
3401 if ((info->flags & DF_TEXTREL) != 0)
3402 {
2df3368d 3403 if (htab->readonly_dynrelocs_against_ifunc)
8efa2874
L		 3404 {
3405 info->callbacks->einfo
3406 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3407 bfd_set_error (bfd_error_bad_value);
3408 return FALSE;
3409 }
3410
0c715baa 3411 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3412 return FALSE;
0c715baa 3413 }
252b5132 3414 }
23209a78 3415 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
7a2b07ff
NS		 3416 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3417 return FALSE;
252b5132 3418 }
dc810e39 3419#undef add_dynamic_entry
252b5132 3420
b34976b6 3421 return TRUE;
252b5132
RH		 3422}
3423
67a4f2b7
AO		 3424static bfd_boolean
3425elf_i386_always_size_sections (bfd *output_bfd,
3426 struct bfd_link_info *info)
3427{
3428 asection *tls_sec = elf_hash_table (info)->tls_sec;
3429
3430 if (tls_sec)
3431 {
3432 struct elf_link_hash_entry *tlsbase;
3433
3434 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3435 "_TLS_MODULE_BASE_",
3436 FALSE, FALSE, FALSE);
3437
3438 if (tlsbase && tlsbase->type == STT_TLS)
3439 {
4dfe6ac6 3440 struct elf_i386_link_hash_table *htab;
67a4f2b7
AO		 3441 struct bfd_link_hash_entry *bh = NULL;
3442 const struct elf_backend_data *bed
3443 = get_elf_backend_data (output_bfd);
3444
4dfe6ac6
NC		 3445 htab = elf_i386_hash_table (info);
3446 if (htab == NULL)
3447 return FALSE;
3448
67a4f2b7
AO		 3449 if (!(_bfd_generic_link_add_one_symbol
3450 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3451 tls_sec, 0, NULL, FALSE,
3452 bed->collect, &bh)))
3453 return FALSE;
9f03412a 3454
4dfe6ac6 3455 htab->tls_module_base = bh;
9f03412a 3456
67a4f2b7
AO		 3457 tlsbase = (struct elf_link_hash_entry *)bh;
3458 tlsbase->def_regular = 1;
3459 tlsbase->other = STV_HIDDEN;
576fa883 3460 tlsbase->root.linker_def = 1;
67a4f2b7
AO		 3461 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3462 }
3463 }
3464
3465 return TRUE;
3466}
3467
38701953
AM		 3468/* Set the correct type for an x86 ELF section. We do this by the
3469 section name, which is a hack, but ought to work. */
3470
b34976b6 3471static bfd_boolean
55fd94b0
AM		 3472elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3473 Elf_Internal_Shdr *hdr,
3474 asection *sec)
38701953 3475{
91d6fa6a 3476 const char *name;
38701953
AM		 3477
3478 name = bfd_get_section_name (abfd, sec);
3479
3480 /* This is an ugly, but unfortunately necessary hack that is
3481 needed when producing EFI binaries on x86. It tells
3482 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3483 containing ELF relocation info. We need this hack in order to
3484 be able to generate ELF binaries that can be translated into
3485 EFI applications (which are essentially COFF objects). Those
3486 files contain a COFF ".reloc" section inside an ELFNN object,
3487 which would normally cause BFD to segfault because it would
3488 attempt to interpret this section as containing relocation
3489 entries for section "oc". With this hack enabled, ".reloc"
3490 will be treated as a normal data section, which will avoid the
3491 segfault. However, you won't be able to create an ELFNN binary
3492 with a section named "oc" that needs relocations, but that's
3493 the kind of ugly side-effects you get when detecting section
3494 types based on their names... In practice, this limitation is
3495 unlikely to bite. */
3496 if (strcmp (name, ".reloc") == 0)
3497 hdr->sh_type = SHT_PROGBITS;
3498
b34976b6 3499 return TRUE;
38701953
AM		 3500}
3501
9f03412a
AO		 3502/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3503 executables. Rather than setting it to the beginning of the TLS
3504 section, we have to set it to the end. This function may be called
3505 multiple times, it is idempotent. */
3506
3507static void
eb4ff4d6 3508elf_i386_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3509{
4dfe6ac6 3510 struct elf_i386_link_hash_table *htab;
9f03412a
AO		 3511 struct bfd_link_hash_entry *base;
3512
0e1862bb 3513 if (!bfd_link_executable (info))
9f03412a
AO		 3514 return;
3515
4dfe6ac6
NC		 3516 htab = elf_i386_hash_table (info);
3517 if (htab == NULL)
3518 return;
9f03412a 3519
4dfe6ac6
NC		 3520 base = htab->tls_module_base;
3521 if (base == NULL)
9f03412a
AO		 3522 return;
3523
4dfe6ac6 3524 base->u.def.value = htab->elf.tls_size;
9f03412a
AO		 3525}
3526
13ae64f3
JJ		 3527/* Return the base VMA address which should be subtracted from real addresses
3528 when resolving @dtpoff relocation.
3529 This is PT_TLS segment p_vaddr. */
3530
3531static bfd_vma
eb4ff4d6 3532elf_i386_dtpoff_base (struct bfd_link_info *info)
13ae64f3 3533{
e1918d23
AM		 3534 /* If tls_sec is NULL, we should have signalled an error already. */
3535 if (elf_hash_table (info)->tls_sec == NULL)
6a30718d 3536 return 0;
e1918d23 3537 return elf_hash_table (info)->tls_sec->vma;
13ae64f3
JJ		 3538}
3539
3540/* Return the relocation value for @tpoff relocation
3541 if STT_TLS virtual address is ADDRESS. */
3542
3543static bfd_vma
eb4ff4d6 3544elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 3545{
e1918d23 3546 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3547 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3548 bfd_vma static_tls_size;
13ae64f3 3549
e1918d23
AM		 3550 /* If tls_sec is NULL, we should have signalled an error already. */
3551 if (htab->tls_sec == NULL)
6a30718d 3552 return 0;
7dc98aea
RO		 3553
3554 /* Consider special static TLS alignment requirements. */
3555 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3556 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 3557}
3558
252b5132
RH		 3559/* Relocate an i386 ELF section. */
3560
b34976b6 3561static bfd_boolean
55fd94b0
AM		 3562elf_i386_relocate_section (bfd *output_bfd,
3563 struct bfd_link_info *info,
3564 bfd *input_bfd,
3565 asection *input_section,
3566 bfd_byte *contents,
3567 Elf_Internal_Rela *relocs,
3568 Elf_Internal_Sym *local_syms,
3569 asection **local_sections)
252b5132 3570{
6725bdbf 3571 struct elf_i386_link_hash_table *htab;
252b5132
RH		 3572 Elf_Internal_Shdr *symtab_hdr;
3573 struct elf_link_hash_entry **sym_hashes;
3574 bfd_vma *local_got_offsets;
67a4f2b7 3575 bfd_vma *local_tlsdesc_gotents;
252b5132 3576 Elf_Internal_Rela *rel;
60f2e42e 3577 Elf_Internal_Rela *wrel;
252b5132 3578 Elf_Internal_Rela *relend;
3348747a 3579 bfd_boolean is_vxworks_tls;
25e762b9 3580 unsigned plt_entry_size;
252b5132 3581
0ffa91dd 3582 BFD_ASSERT (is_i386_elf (input_bfd));
6bbec505 3583
6725bdbf 3584 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 3585 if (htab == NULL)
3586 return FALSE;
0ffa91dd 3587 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 3588 sym_hashes = elf_sym_hashes (input_bfd);
3589 local_got_offsets = elf_local_got_offsets (input_bfd);
67a4f2b7 3590 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 3591 /* We have to handle relocations in vxworks .tls_vars sections
3592 specially, because the dynamic loader is 'weird'. */
23209a78 3593 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
0e1862bb 3594 && bfd_link_pic (info)
3348747a
NS		 3595 && !strcmp (input_section->output_section->name,
3596 ".tls_vars"));
252b5132 3597
eb4ff4d6 3598 elf_i386_set_tls_module_base (info);
9f03412a 3599
25e762b9
RM		 3600 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3601
60f2e42e 3602 rel = wrel = relocs;
252b5132 3603 relend = relocs + input_section->reloc_count;
60f2e42e 3604 for (; rel < relend; wrel++, rel++)
252b5132 3605 {
13ae64f3 3606 unsigned int r_type;
252b5132
RH		 3607 reloc_howto_type *howto;
3608 unsigned long r_symndx;
3609 struct elf_link_hash_entry *h;
dd7e64d4 3610 struct elf_i386_link_hash_entry *eh;
252b5132
RH		 3611 Elf_Internal_Sym *sym;
3612 asection *sec;
dd7e64d4 3613 bfd_vma off, offplt, plt_offset;
252b5132 3614 bfd_vma relocation;
b34976b6 3615 bfd_boolean unresolved_reloc;
252b5132 3616 bfd_reloc_status_type r;
1b452ec6 3617 unsigned int indx;
13ae64f3 3618 int tls_type;
1788fc08 3619 bfd_vma st_size;
dd7e64d4 3620 asection *resolved_plt;
aec6b87e 3621 bfd_boolean resolved_to_zero;
252b5132
RH		 3622
3623 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 3624 if (r_type == R_386_GNU_VTINHERIT
3625 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 3626 {
3627 if (wrel != rel)
3628 *wrel = *rel;
3629 continue;
3630 }
dc47f327 3631
55fd94b0 3632 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 3633 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3634 >= R_386_ext - R_386_standard)
3635 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520 3636 >= R_386_ext2 - R_386_ext))
252b5132 3637 {
6ba842b6 3638 (*_bfd_error_handler)
d003868e
AM		 3639 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3640 input_bfd, input_section, r_type);
252b5132 3641 bfd_set_error (bfd_error_bad_value);
b34976b6 3642 return FALSE;
252b5132 3643 }
1b452ec6 3644 howto = elf_howto_table + indx;
252b5132
RH		 3645
3646 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 3647 h = NULL;
3648 sym = NULL;
3649 sec = NULL;
b34976b6 3650 unresolved_reloc = FALSE;
252b5132
RH		 3651 if (r_symndx < symtab_hdr->sh_info)
3652 {
3653 sym = local_syms + r_symndx;
3654 sec = local_sections[r_symndx];
3655 relocation = (sec->output_section->vma
3656 + sec->output_offset
3657 + sym->st_value);
1788fc08 3658 st_size = sym->st_size;
ab96bf03
AM		 3659
3660 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3661 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 3662 || (bfd_link_relocatable (info)
ab96bf03 3663 && sec->output_offset != 0)))
f8df10f4 3664 {
f8df10f4 3665 bfd_vma addend;
4a335f3d 3666 bfd_byte *where = contents + rel->r_offset;
f8df10f4 3667
4a335f3d 3668 switch (howto->size)
f8df10f4 3669 {
4a335f3d
AM		 3670 case 0:
3671 addend = bfd_get_8 (input_bfd, where);
3672 if (howto->pc_relative)
3673 {
3674 addend = (addend ^ 0x80) - 0x80;
3675 addend += 1;
3676 }
3677 break;
3678 case 1:
3679 addend = bfd_get_16 (input_bfd, where);
3680 if (howto->pc_relative)
3681 {
3682 addend = (addend ^ 0x8000) - 0x8000;
3683 addend += 2;
3684 }
3685 break;
3686 case 2:
3687 addend = bfd_get_32 (input_bfd, where);
3688 if (howto->pc_relative)
3689 {
3690 addend = (addend ^ 0x80000000) - 0x80000000;
3691 addend += 4;
3692 }
3693 break;
3694 default:
3695 abort ();
f8df10f4
JJ		 3696 }
3697
0e1862bb 3698 if (bfd_link_relocatable (info))
ab96bf03
AM		 3699 addend += sec->output_offset;
3700 else
3701 {
3702 asection *msec = sec;
3703 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3704 addend);
3705 addend -= relocation;
3706 addend += msec->output_section->vma + msec->output_offset;
3707 }
4a335f3d
AM		 3708
3709 switch (howto->size)
3710 {
3711 case 0:
16a10388 3712 /* FIXME: overflow checks. */
4a335f3d
AM		 3713 if (howto->pc_relative)
3714 addend -= 1;
3715 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 3716 break;
3717 case 1:
3718 if (howto->pc_relative)
3719 addend -= 2;
3720 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 3721 break;
3722 case 2:
3723 if (howto->pc_relative)
3724 addend -= 4;
3725 bfd_put_32 (input_bfd, addend, where);
3726 break;
3727 }
f8df10f4 3728 }
0e1862bb 3729 else if (!bfd_link_relocatable (info)
1f85278f 3730 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 3731 {
3732 /* Relocate against local STT_GNU_IFUNC symbol. */
9fff0c39
L		 3733 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3734 FALSE);
c25bc9fc
L		 3735 if (h == NULL)
3736 abort ();
3737
23209a78 3738 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3739 h->root.u.def.value = sym->st_value;
3740 h->root.u.def.section = sec;
3741 }
252b5132
RH		 3742 }
3743 else
3744 {
3d540e93 3745 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 3746 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 3747
b2a8e766
AM		 3748 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3749 r_symndx, symtab_hdr, sym_hashes,
3750 h, sec, relocation,
62d887d4 3751 unresolved_reloc, warned, ignored);
1788fc08 3752 st_size = h->size;
252b5132
RH		 3753 }
3754
dbaa2011 3755 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 3756 {
3757 _bfd_clear_contents (howto, input_bfd, input_section,
3758 contents + rel->r_offset);
3759 wrel->r_offset = rel->r_offset;
3760 wrel->r_info = 0;
3761 wrel->r_addend = 0;
3762
3763 /* For ld -r, remove relocations in debug sections against
3764 sections defined in discarded sections. Not done for
3765 eh_frame editing code expects to be present. */
3766 if (bfd_link_relocatable (info)
3767 && (input_section->flags & SEC_DEBUGGING))
3768 wrel--;
3769
3770 continue;
3771 }
9635fe29 3772
0e1862bb 3773 if (bfd_link_relocatable (info))
2d5da473
L		 3774 {
3775 if (wrel != rel)
3776 *wrel = *rel;
3777 continue;
3778 }
ab96bf03 3779
cbe950e9
L		 3780 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3781 it here if it is defined in a non-shared object. */
3782 if (h != NULL
3783 && h->type == STT_GNU_IFUNC
3784 && h->def_regular)
3785 {
3786 asection *plt, *gotplt, *base_got;
3787 bfd_vma plt_index;
4c544807 3788 const char *name;
cbe950e9 3789
97dc35c8
L		 3790 if ((input_section->flags & SEC_ALLOC) == 0)
3791 {
3792 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3793 sections because such sections are not SEC_ALLOC and
3794 thus ld.so will not process them. */
3795 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 3796 continue;
97dc35c8
L		 3797 abort ();
3798 }
3799 else if (h->plt.offset == (bfd_vma) -1)
cbe950e9
L		 3800 abort ();
3801
3802 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3803 if (htab->elf.splt != NULL)
cbe950e9 3804 {
6de2ae4a
L		 3805 plt = htab->elf.splt;
3806 gotplt = htab->elf.sgotplt;
cbe950e9
L		 3807 }
3808 else
3809 {
6de2ae4a
L		 3810 plt = htab->elf.iplt;
3811 gotplt = htab->elf.igotplt;
cbe950e9
L		 3812 }
3813
3814 relocation = (plt->output_section->vma
3815 + plt->output_offset + h->plt.offset);
3816
3817 switch (r_type)
3818 {
3819 default:
4c544807
L		 3820 if (h->root.root.string)
3821 name = h->root.root.string;
3822 else
3823 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3824 NULL);
cbe950e9
L		 3825 (*_bfd_error_handler)
3826 (_("%B: relocation %s against STT_GNU_IFUNC "
3827 "symbol `%s' isn't handled by %s"), input_bfd,
3828 elf_howto_table[r_type].name,
4c544807 3829 name, __FUNCTION__);
cbe950e9
L		 3830 bfd_set_error (bfd_error_bad_value);
3831 return FALSE;
3832
3833 case R_386_32:
710ab287 3834 /* Generate dynamic relcoation only when there is a
c293fa49 3835 non-GOT reference in a shared object. */
0e1862bb 3836 if (bfd_link_pic (info) && h->non_got_ref)
710ab287
L		 3837 {
3838 Elf_Internal_Rela outrel;
710ab287
L		 3839 asection *sreloc;
3840 bfd_vma offset;
3841
c25bc9fc
L		 3842 /* Need a dynamic relocation to get the real function
3843 adddress. */
710ab287
L		 3844 offset = _bfd_elf_section_offset (output_bfd,
3845 info,
3846 input_section,
3847 rel->r_offset);
3848 if (offset == (bfd_vma) -1
3849 || offset == (bfd_vma) -2)
3850 abort ();
3851
3852 outrel.r_offset = (input_section->output_section->vma
3853 + input_section->output_offset
3854 + offset);
3855
3856 if (h->dynindx == -1
44c4ea11 3857 || h->forced_local
0e1862bb 3858 || bfd_link_executable (info))
710ab287
L		 3859 {
3860 /* This symbol is resolved locally. */
56b8aada
L		 3861 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3862 bfd_put_32 (output_bfd,
3863 (h->root.u.def.value
3864 + h->root.u.def.section->output_section->vma
3865 + h->root.u.def.section->output_offset),
3866 contents + offset);
710ab287
L		 3867 }
3868 else
56b8aada 3869 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
710ab287 3870
6de2ae4a 3871 sreloc = htab->elf.irelifunc;
59d6ffb2 3872 elf_append_rel (output_bfd, sreloc, &outrel);
710ab287
L		 3873
3874 /* If this reloc is against an external symbol, we
3875 do not want to fiddle with the addend. Otherwise,
3876 we need to include the symbol value so that it
3877 becomes an addend for the dynamic reloc. For an
3878 internal symbol, we have updated addend. */
56b8aada 3879 continue;
710ab287 3880 }
d59a60e9 3881 /* FALLTHROUGH */
cbe950e9
L		 3882 case R_386_PC32:
3883 case R_386_PLT32:
3884 goto do_relocation;
3885
3886 case R_386_GOT32:
02a86693 3887 case R_386_GOT32X:
6de2ae4a 3888 base_got = htab->elf.sgot;
cbe950e9
L		 3889 off = h->got.offset;
3890
7afd84dc 3891 if (base_got == NULL)
cbe950e9
L		 3892 abort ();
3893
7afd84dc 3894 if (off == (bfd_vma) -1)
cbe950e9 3895 {
7afd84dc
L		 3896 /* We can't use h->got.offset here to save state, or
3897 even just remember the offset, as finish_dynamic_symbol
3898 would use that as offset into .got. */
6bbec505 3899
6de2ae4a 3900 if (htab->elf.splt != NULL)
7afd84dc 3901 {
25e762b9 3902 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 3903 off = (plt_index + 3) * 4;
6de2ae4a 3904 base_got = htab->elf.sgotplt;
7afd84dc 3905 }
cbe950e9
L		 3906 else
3907 {
25e762b9 3908 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3909 off = plt_index * 4;
6de2ae4a 3910 base_got = htab->elf.igotplt;
7afd84dc
L		 3911 }
3912
3913 if (h->dynindx == -1
3914 || h->forced_local
3915 || info->symbolic)
3916 {
3917 /* This references the local defitionion. We must
3918 initialize this entry in the global offset table.
3919 Since the offset must always be a multiple of 8,
3920 we use the least significant bit to record
3921 whether we have initialized it already.
3922
3923 When doing a dynamic link, we create a .rela.got
3924 relocation entry to initialize the value. This
3925 is done in the finish_dynamic_symbol routine. */
3926 if ((off & 1) != 0)
3927 off &= ~1;
3928 else
3929 {
3930 bfd_put_32 (output_bfd, relocation,
3931 base_got->contents + off);
3932 h->got.offset |= 1;
3933 }
cbe950e9 3934 }
cbe950e9 3935
7afd84dc 3936 relocation = off;
cbe950e9 3937
7afd84dc 3938 /* Adjust for static executables. */
6de2ae4a 3939 if (htab->elf.splt == NULL)
7afd84dc
L		 3940 relocation += gotplt->output_offset;
3941 }
3942 else
0018b0a3
L		 3943 {
3944 relocation = (base_got->output_section->vma
3945 + base_got->output_offset + off
3946 - gotplt->output_section->vma
3947 - gotplt->output_offset);
3948 /* Adjust for static executables. */
6de2ae4a 3949 if (htab->elf.splt == NULL)
0018b0a3
L		 3950 relocation += gotplt->output_offset;
3951 }
3952
cbe950e9
L		 3953 goto do_relocation;
3954
3955 case R_386_GOTOFF:
3956 relocation -= (gotplt->output_section->vma
3957 + gotplt->output_offset);
3958 goto do_relocation;
3959 }
3960 }
3961
04ebc307 3962 eh = (struct elf_i386_link_hash_entry *) h;
aec6b87e
L		 3963 resolved_to_zero = (eh != NULL
3964 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
3965
252b5132
RH		 3966 switch (r_type)
3967 {
02a86693
L		 3968 case R_386_GOT32X:
3969 /* Avoid optimizing _DYNAMIC since ld.so may use its
3970 link-time address. */
3971 if (h == htab->elf.hdynamic)
3972 goto r_386_got32;
3973
3974 if (bfd_link_pic (info))
3975 {
3976 /* It is OK to convert mov to lea and convert indirect
3977 branch to direct branch. It is OK to convert adc,
3978 add, and, cmp, or, sbb, sub, test, xor only when PIC
3979 is false. */
02e2aef8
L		 3980 unsigned int opcode, addend;
3981 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3982 if (addend != 0)
3983 goto r_386_got32;
3984 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
02a86693
L		 3985 if (opcode != 0x8b && opcode != 0xff)
3986 goto r_386_got32;
3987 }
3988
3989 /* Resolve "mov GOT[(%reg)], %reg",
3990 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
3991 and "binop foo@GOT[(%reg)], %reg". */
3992 if (h == NULL
3993 || (h->plt.offset == (bfd_vma) -1
3994 && h->got.offset == (bfd_vma) -1)
3995 || htab->elf.sgotplt == NULL)
3996 abort ();
3997
3998 offplt = (htab->elf.sgotplt->output_section->vma
3999 + htab->elf.sgotplt->output_offset);
4000
4001 /* It is relative to .got.plt section. */
4002 if (h->got.offset != (bfd_vma) -1)
32875eb1
L		 4003 /* Use GOT entry. Mask off the least significant bit in
4004 GOT offset which may be set by R_386_GOT32 processing
4005 below. */
02a86693
L		 4006 relocation = (htab->elf.sgot->output_section->vma
4007 + htab->elf.sgot->output_offset
32875eb1 4008 + (h->got.offset & ~1) - offplt);
02a86693
L		 4009 else
4010 /* Use GOTPLT entry. */
4011 relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4;
4012
4013 if (!bfd_link_pic (info))
4014 {
4015 /* If not PIC, add the .got.plt section address for
a3718e9e 4016 baseless addressing. */
02a86693 4017 unsigned int modrm;
02e2aef8 4018 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
02a86693
L		 4019 if ((modrm & 0xc7) == 0x5)
4020 relocation += offplt;
4021 }
4022
4023 unresolved_reloc = FALSE;
4024 break;
4025
252b5132 4026 case R_386_GOT32:
02a86693 4027r_386_got32:
252b5132
RH		 4028 /* Relocation is to the entry for this symbol in the global
4029 offset table. */
6de2ae4a 4030 if (htab->elf.sgot == NULL)
ffb2e45b 4031 abort ();
252b5132
RH		 4032
4033 if (h != NULL)
4034 {
b34976b6 4035 bfd_boolean dyn;
252b5132
RH		 4036
4037 off = h->got.offset;
ebe50bae 4038 dyn = htab->elf.dynamic_sections_created;
0e1862bb
L		 4039 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4040 bfd_link_pic (info),
4041 h)
4042 || (bfd_link_pic (info)
586119b3 4043 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 4044 || (ELF_ST_VISIBILITY (h->other)
4045 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 4046 {
4047 /* This is actually a static link, or it is a
4048 -Bsymbolic link and the symbol is defined
4049 locally, or the symbol was forced to be local
4050 because of a version file. We must initialize
4051 this entry in the global offset table. Since the
4052 offset must always be a multiple of 4, we use the
4053 least significant bit to record whether we have
4054 initialized it already.
4055
4056 When doing a dynamic link, we create a .rel.got
4057 relocation entry to initialize the value. This
4058 is done in the finish_dynamic_symbol routine. */
4059 if ((off & 1) != 0)
4060 off &= ~1;
4061 else
4062 {
4063 bfd_put_32 (output_bfd, relocation,
6de2ae4a 4064 htab->elf.sgot->contents + off);
252b5132
RH		 4065 h->got.offset |= 1;
4066 }
4067 }
8c694914 4068 else
b34976b6 4069 unresolved_reloc = FALSE;
252b5132
RH		 4070 }
4071 else
4072 {
ffb2e45b
AM		 4073 if (local_got_offsets == NULL)
4074 abort ();
252b5132
RH		 4075
4076 off = local_got_offsets[r_symndx];
4077
4078 /* The offset must always be a multiple of 4. We use
83be169b
AM		 4079 the least significant bit to record whether we have
4080 already generated the necessary reloc. */
252b5132
RH		 4081 if ((off & 1) != 0)
4082 off &= ~1;
4083 else
4084 {
6725bdbf 4085 bfd_put_32 (output_bfd, relocation,
6de2ae4a 4086 htab->elf.sgot->contents + off);
252b5132 4087
0e1862bb 4088 if (bfd_link_pic (info))
252b5132 4089 {
947216bf
AM		 4090 asection *s;
4091 Elf_Internal_Rela outrel;
252b5132 4092
6de2ae4a 4093 s = htab->elf.srelgot;
947216bf 4094 if (s == NULL)
ffb2e45b 4095 abort ();
252b5132 4096
6de2ae4a
L		 4097 outrel.r_offset = (htab->elf.sgot->output_section->vma
4098 + htab->elf.sgot->output_offset
252b5132
RH		 4099 + off);
4100 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
59d6ffb2 4101 elf_append_rel (output_bfd, s, &outrel);
252b5132
RH		 4102 }
4103
4104 local_got_offsets[r_symndx] |= 1;
4105 }
252b5132
RH		 4106 }
4107
ffb2e45b
AM		 4108 if (off >= (bfd_vma) -2)
4109 abort ();
4110
6de2ae4a
L		 4111 relocation = htab->elf.sgot->output_section->vma
4112 + htab->elf.sgot->output_offset + off
4113 - htab->elf.sgotplt->output_section->vma
4114 - htab->elf.sgotplt->output_offset;
252b5132
RH		 4115 break;
4116
4117 case R_386_GOTOFF:
4118 /* Relocation is relative to the start of the global offset
4119 table. */
4120
3d949995
L		 4121 /* Check to make sure it isn't a protected function or data
4122 symbol for shared library since it may not be local when
4123 used as function address or with copy relocation. We also
e3c0e327 4124 need to make sure that a symbol is referenced locally. */
0e1862bb 4125 if (!bfd_link_executable (info) && h)
90f487df 4126 {
41bed6dd
L		 4127 if (!h->def_regular)
4128 {
4129 const char *v;
4130
4131 switch (ELF_ST_VISIBILITY (h->other))
4132 {
4133 case STV_HIDDEN:
4134 v = _("hidden symbol");
4135 break;
4136 case STV_INTERNAL:
4137 v = _("internal symbol");
4138 break;
4139 case STV_PROTECTED:
4140 v = _("protected symbol");
4141 break;
4142 default:
4143 v = _("symbol");
4144 break;
4145 }
4146
4147 (*_bfd_error_handler)
4148 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
4149 input_bfd, v, h->root.root.string);
4150 bfd_set_error (bfd_error_bad_value);
4151 return FALSE;
4152 }
d5597ebc 4153 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3d949995
L		 4154 && (h->type == STT_FUNC
4155 || h->type == STT_OBJECT)
41bed6dd
L		 4156 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4157 {
4158 (*_bfd_error_handler)
3d949995
L		 4159 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
4160 input_bfd,
4161 h->type == STT_FUNC ? "function" : "data",
4162 h->root.root.string);
41bed6dd
L		 4163 bfd_set_error (bfd_error_bad_value);
4164 return FALSE;
4165 }
90f487df
L		 4166 }
4167
8c37241b
JJ		 4168 /* Note that sgot is not involved in this
4169 calculation. We always want the start of .got.plt. If we
4170 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 4171 permitted by the ABI, we might have to change this
4172 calculation. */
6de2ae4a
L		 4173 relocation -= htab->elf.sgotplt->output_section->vma
4174 + htab->elf.sgotplt->output_offset;
252b5132
RH		 4175 break;
4176
4177 case R_386_GOTPC:
4178 /* Use global offset table as symbol value. */
6de2ae4a
L		 4179 relocation = htab->elf.sgotplt->output_section->vma
4180 + htab->elf.sgotplt->output_offset;
b34976b6 4181 unresolved_reloc = FALSE;
252b5132
RH		 4182 break;
4183
4184 case R_386_PLT32:
4185 /* Relocation is to the entry for this symbol in the
4186 procedure linkage table. */
4187
dd5724d5 4188 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 4189 without using the procedure linkage table. */
252b5132
RH		 4190 if (h == NULL)
4191 break;
4192
dd7e64d4
L		 4193 if ((h->plt.offset == (bfd_vma) -1
4194 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 4195 || htab->elf.splt == NULL)
252b5132
RH		 4196 {
4197 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 4198 happens when statically linking PIC code, or when
4199 using -Bsymbolic. */
252b5132
RH		 4200 break;
4201 }
4202
dd7e64d4
L		 4203 if (h->plt.offset != (bfd_vma) -1)
4204 {
4205 resolved_plt = htab->elf.splt;
4206 plt_offset = h->plt.offset;
4207 }
4208 else
4209 {
4210 resolved_plt = htab->plt_got;
4211 plt_offset = eh->plt_got.offset;
4212 }
4213
4214 relocation = (resolved_plt->output_section->vma
4215 + resolved_plt->output_offset
4216 + plt_offset);
b34976b6 4217 unresolved_reloc = FALSE;
252b5132
RH		 4218 break;
4219
1788fc08 4220 case R_386_SIZE32:
1788fc08
L		 4221 /* Set to symbol size. */
4222 relocation = st_size;
4223 /* Fall through. */
4224
252b5132
RH		 4225 case R_386_32:
4226 case R_386_PC32:
3348747a
NS		 4227 if ((input_section->flags & SEC_ALLOC) == 0
4228 || is_vxworks_tls)
ec338859
AM		 4229 break;
4230
aec6b87e
L		 4231 /* Copy dynamic function pointer relocations. Don't generate
4232 dynamic relocations against resolved undefined weak symbols
4233 in PIE, except for R_386_PC32. */
0e1862bb 4234 if ((bfd_link_pic (info)
ef5aade5 4235 && (h == NULL
aec6b87e
L		 4236 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4237 && (!resolved_to_zero
4238 || r_type == R_386_PC32))
4239 || h->root.type != bfd_link_hash_undefweak))
1788fc08 4240 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
f6c52c13 4241 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845 4242 || (ELIMINATE_COPY_RELOCS
0e1862bb 4243 && !bfd_link_pic (info)
12d0ee4a
AM		 4244 && h != NULL
4245 && h->dynindx != -1
aec6b87e
L		 4246 && (!h->non_got_ref
4247 || eh->func_pointer_refcount > 0
4248 || (h->root.type == bfd_link_hash_undefweak
4249 && !resolved_to_zero))
bae420ef
L		 4250 && ((h->def_dynamic && !h->def_regular)
4251 /* Undefined weak symbol is bound locally when
4252 PIC is false. */
4253 || h->root.type == bfd_link_hash_undefweak)))
252b5132 4254 {
947216bf 4255 Elf_Internal_Rela outrel;
b34976b6 4256 bfd_boolean skip, relocate;
0c715baa 4257 asection *sreloc;
252b5132
RH		 4258
4259 /* When generating a shared object, these relocations
4260 are copied into the output file to be resolved at run
4261 time. */
4262
b34976b6
AM		 4263 skip = FALSE;
4264 relocate = FALSE;
252b5132 4265
c629eae0
JJ		 4266 outrel.r_offset =
4267 _bfd_elf_section_offset (output_bfd, info, input_section,
4268 rel->r_offset);
4269 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 4270 skip = TRUE;
0bb2d96a 4271 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 4272 skip = TRUE, relocate = TRUE;
252b5132
RH		 4273 outrel.r_offset += (input_section->output_section->vma
4274 + input_section->output_offset);
4275
4276 if (skip)
0bb2d96a 4277 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 4278 else if (h != NULL
4279 && h->dynindx != -1
4280 && (r_type == R_386_PC32
4e0c91e4
L		 4281 || !(bfd_link_executable (info)
4282 || SYMBOLIC_BIND (info, h))
f5385ebf 4283 || !h->def_regular))
0bb2d96a 4284 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 4285 else
4286 {
5a15f56f 4287 /* This symbol is local, or marked to become local. */
b34976b6 4288 relocate = TRUE;
5a15f56f 4289 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 4290 }
4291
cbe950e9 4292 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 4293
62d78908
L		 4294 if (sreloc == NULL || sreloc->contents == NULL)
4295 {
4296 r = bfd_reloc_notsupported;
4297 goto check_relocation_error;
4298 }
0c715baa 4299
59d6ffb2 4300 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 4301
4302 /* If this reloc is against an external symbol, we do
4303 not want to fiddle with the addend. Otherwise, we
4304 need to include the symbol value so that it becomes
4305 an addend for the dynamic reloc. */
0f88be7a 4306 if (! relocate)
252b5132
RH		 4307 continue;
4308 }
252b5132
RH		 4309 break;
4310
37e55690 4311 case R_386_TLS_IE:
0e1862bb 4312 if (!bfd_link_executable (info))
37e55690 4313 {
947216bf 4314 Elf_Internal_Rela outrel;
37e55690 4315 asection *sreloc;
37e55690
JJ		 4316
4317 outrel.r_offset = rel->r_offset
4318 + input_section->output_section->vma
4319 + input_section->output_offset;
4320 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4321 sreloc = elf_section_data (input_section)->sreloc;
4322 if (sreloc == NULL)
4323 abort ();
59d6ffb2 4324 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 4325 }
4326 /* Fall through */
4327
13ae64f3 4328 case R_386_TLS_GD:
67a4f2b7
AO		 4329 case R_386_TLS_GOTDESC:
4330 case R_386_TLS_DESC_CALL:
13ae64f3 4331 case R_386_TLS_IE_32:
37e55690 4332 case R_386_TLS_GOTIE:
13ae64f3
JJ		 4333 tls_type = GOT_UNKNOWN;
4334 if (h == NULL && local_got_offsets)
4335 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
4336 else if (h != NULL)
142411ca 4337 tls_type = elf_i386_hash_entry(h)->tls_type;
37e55690
JJ		 4338 if (tls_type == GOT_TLS_IE)
4339 tls_type = GOT_TLS_IE_NEG;
142411ca
L		 4340
4341 if (! elf_i386_tls_transition (info, input_bfd,
4342 input_section, contents,
4343 symtab_hdr, sym_hashes,
4344 &r_type, tls_type, rel,
4c544807 4345 relend, h, r_symndx))
142411ca 4346 return FALSE;
13ae64f3
JJ		 4347
4348 if (r_type == R_386_TLS_LE_32)
4349 {
82e51918 4350 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 4351 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4352 {
142411ca 4353 unsigned int type;
13ae64f3
JJ		 4354 bfd_vma roff;
4355
4356 /* GD->LE transition. */
13ae64f3 4357 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ		 4358 if (type == 0x04)
4359 {
4360 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4361 Change it into:
4362 movl %gs:0, %eax; subl $foo@tpoff, %eax
4363 (6 byte form of subl). */
13ae64f3
JJ		 4364 memcpy (contents + rel->r_offset - 3,
4365 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
142411ca 4366 roff = rel->r_offset + 5;
13ae64f3
JJ		 4367 }
4368 else
4369 {
142411ca
L		 4370 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4371 Change it into:
4372 movl %gs:0, %eax; subl $foo@tpoff, %eax
4373 (6 byte form of subl). */
4374 memcpy (contents + rel->r_offset - 2,
4375 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4376 roff = rel->r_offset + 6;
13ae64f3 4377 }
eb4ff4d6 4378 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 4379 contents + roff);
a3fadc9a 4380 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 4381 rel++;
60f2e42e 4382 wrel++;
13ae64f3
JJ		 4383 continue;
4384 }
67a4f2b7
AO		 4385 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4386 {
4387 /* GDesc -> LE transition.
4388 It's originally something like:
4389 leal x@tlsdesc(%ebx), %eax
4390
4391 leal x@ntpoff, %eax
4392
4393 Registers other than %eax may be set up here. */
4394
142411ca 4395 unsigned int val;
67a4f2b7
AO		 4396 bfd_vma roff;
4397
67a4f2b7 4398 roff = rel->r_offset;
67a4f2b7 4399 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 4400
4401 /* Now modify the instruction as appropriate. */
4402 /* aoliva FIXME: remove the above and xor the byte
4403 below with 0x86. */
4404 bfd_put_8 (output_bfd, val ^ 0x86,
4405 contents + roff - 1);
eb4ff4d6 4406 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 4407 contents + roff);
4408 continue;
4409 }
4410 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4411 {
4412 /* GDesc -> LE transition.
4413 It's originally:
4414 call *(%eax)
4415 Turn it into:
142411ca 4416 xchg %ax,%ax */
67a4f2b7 4417
67a4f2b7 4418 bfd_vma roff;
6bbec505 4419
67a4f2b7 4420 roff = rel->r_offset;
10efb593 4421 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4422 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4423 continue;
4424 }
37e55690 4425 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3 4426 {
142411ca 4427 unsigned int val;
13ae64f3
JJ		 4428
4429 /* IE->LE transition:
37e55690
JJ		 4430 Originally it can be one of:
4431 movl foo, %eax
4432 movl foo, %reg
4433 addl foo, %reg
4434 We change it into:
4435 movl $foo, %eax
4436 movl $foo, %reg
4437 addl $foo, %reg. */
37e55690 4438 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 4439 if (val == 0xa1)
4440 {
4441 /* movl foo, %eax. */
55fd94b0
AM		 4442 bfd_put_8 (output_bfd, 0xb8,
4443 contents + rel->r_offset - 1);
37e55690 4444 }
299bf759 4445 else
37e55690 4446 {
142411ca
L		 4447 unsigned int type;
4448
55fd94b0
AM		 4449 type = bfd_get_8 (input_bfd,
4450 contents + rel->r_offset - 2);
299bf759 4451 switch (type)
26e41594 4452 {
299bf759
L		 4453 case 0x8b:
4454 /* movl */
299bf759
L		 4455 bfd_put_8 (output_bfd, 0xc7,
4456 contents + rel->r_offset - 2);
4457 bfd_put_8 (output_bfd,
4458 0xc0 | ((val >> 3) & 7),
4459 contents + rel->r_offset - 1);
4460 break;
4461 case 0x03:
4462 /* addl */
299bf759
L		 4463 bfd_put_8 (output_bfd, 0x81,
4464 contents + rel->r_offset - 2);
4465 bfd_put_8 (output_bfd,
4466 0xc0 | ((val >> 3) & 7),
4467 contents + rel->r_offset - 1);
4468 break;
4469 default:
4470 BFD_FAIL ();
4471 break;
26e41594 4472 }
37e55690 4473 }
eb4ff4d6 4474 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4475 contents + rel->r_offset);
4476 continue;
4477 }
4478 else
4479 {
4480 unsigned int val, type;
4481
4482 /* {IE_32,GOTIE}->LE transition:
4483 Originally it can be one of:
13ae64f3 4484 subl foo(%reg1), %reg2
13ae64f3 4485 movl foo(%reg1), %reg2
37e55690 4486 addl foo(%reg1), %reg2
13ae64f3
JJ		 4487 We change it into:
4488 subl $foo, %reg2
37e55690
JJ		 4489 movl $foo, %reg2 (6 byte form)
4490 addl $foo, %reg2. */
13ae64f3
JJ		 4491 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4492 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 4493 if (type == 0x8b)
4494 {
4495 /* movl */
13ae64f3
JJ		 4496 bfd_put_8 (output_bfd, 0xc7,
4497 contents + rel->r_offset - 2);
4498 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4499 contents + rel->r_offset - 1);
4500 }
4501 else if (type == 0x2b)
4502 {
4503 /* subl */
13ae64f3
JJ		 4504 bfd_put_8 (output_bfd, 0x81,
4505 contents + rel->r_offset - 2);
4506 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4507 contents + rel->r_offset - 1);
4508 }
37e55690
JJ		 4509 else if (type == 0x03)
4510 {
4511 /* addl */
4512 bfd_put_8 (output_bfd, 0x81,
4513 contents + rel->r_offset - 2);
4514 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4515 contents + rel->r_offset - 1);
4516 }
13ae64f3
JJ		 4517 else
4518 BFD_FAIL ();
37e55690 4519 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
eb4ff4d6 4520 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4521 contents + rel->r_offset);
4522 else
eb4ff4d6 4523 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 4524 contents + rel->r_offset);
13ae64f3
JJ		 4525 continue;
4526 }
4527 }
4528
6de2ae4a 4529 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4530 abort ();
4531
4532 if (h != NULL)
67a4f2b7
AO		 4533 {
4534 off = h->got.offset;
4535 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4536 }
13ae64f3
JJ		 4537 else
4538 {
4539 if (local_got_offsets == NULL)
4540 abort ();
4541
4542 off = local_got_offsets[r_symndx];
67a4f2b7 4543 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 4544 }
4545
4546 if ((off & 1) != 0)
4547 off &= ~1;
26e41594 4548 else
13ae64f3 4549 {
947216bf 4550 Elf_Internal_Rela outrel;
91d6fa6a 4551 int dr_type;
67a4f2b7 4552 asection *sreloc;
13ae64f3 4553
6de2ae4a 4554 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4555 abort ();
4556
67a4f2b7
AO		 4557 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4558
4559 if (GOT_TLS_GDESC_P (tls_type))
4560 {
59d6ffb2 4561 bfd_byte *loc;
67a4f2b7
AO		 4562 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4563 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 4564 <= htab->elf.sgotplt->size);
4565 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4566 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4567 + offplt
4568 + htab->sgotplt_jump_table_size);
6de2ae4a 4569 sreloc = htab->elf.srelplt;
67a4f2b7 4570 loc = sreloc->contents;
5ae0bfb6
RS		 4571 loc += (htab->next_tls_desc_index++
4572 * sizeof (Elf32_External_Rel));
67a4f2b7 4573 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 4574 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 4575 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4576 if (indx == 0)
4577 {
4578 BFD_ASSERT (! unresolved_reloc);
4579 bfd_put_32 (output_bfd,
eb4ff4d6 4580 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4581 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4582 + htab->sgotplt_jump_table_size + 4);
4583 }
4584 else
4585 {
4586 bfd_put_32 (output_bfd, 0,
6de2ae4a 4587 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4588 + htab->sgotplt_jump_table_size + 4);
4589 }
4590 }
4591
6de2ae4a 4592 sreloc = htab->elf.srelgot;
67a4f2b7 4593
6de2ae4a
L		 4594 outrel.r_offset = (htab->elf.sgot->output_section->vma
4595 + htab->elf.sgot->output_offset + off);
13ae64f3 4596
67a4f2b7 4597 if (GOT_TLS_GD_P (tls_type))
13ae64f3 4598 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 4599 else if (GOT_TLS_GDESC_P (tls_type))
4600 goto dr_done;
37e55690
JJ		 4601 else if (tls_type == GOT_TLS_IE_POS)
4602 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 4603 else
4604 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 4605
37e55690 4606 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6
L		 4607 bfd_put_32 (output_bfd,
4608 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4609 htab->elf.sgot->contents + off);
37e55690 4610 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 4611 bfd_put_32 (output_bfd,
eb4ff4d6 4612 elf_i386_dtpoff_base (info) - relocation,
6de2ae4a 4613 htab->elf.sgot->contents + off);
67a4f2b7 4614 else if (dr_type != R_386_TLS_DESC)
c366c25e 4615 bfd_put_32 (output_bfd, 0,
6de2ae4a 4616 htab->elf.sgot->contents + off);
13ae64f3 4617 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 4618
59d6ffb2 4619 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 4620
67a4f2b7 4621 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 4622 {
4623 if (indx == 0)
4624 {
82e51918 4625 BFD_ASSERT (! unresolved_reloc);
13ae64f3 4626 bfd_put_32 (output_bfd,
eb4ff4d6 4627 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4628 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4629 }
4630 else
4631 {
4632 bfd_put_32 (output_bfd, 0,
6de2ae4a 4633 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4634 outrel.r_info = ELF32_R_INFO (indx,
4635 R_386_TLS_DTPOFF32);
4636 outrel.r_offset += 4;
59d6ffb2 4637 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 4638 }
4639 }
37e55690
JJ		 4640 else if (tls_type == GOT_TLS_IE_BOTH)
4641 {
4642 bfd_put_32 (output_bfd,
eb4ff4d6
L		 4643 (indx == 0
4644 ? relocation - elf_i386_dtpoff_base (info)
4645 : 0),
6de2ae4a 4646 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 4647 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4648 outrel.r_offset += 4;
59d6ffb2 4649 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 4650 }
13ae64f3 4651
67a4f2b7 4652 dr_done:
13ae64f3
JJ		 4653 if (h != NULL)
4654 h->got.offset |= 1;
4655 else
4656 local_got_offsets[r_symndx] |= 1;
4657 }
4658
67a4f2b7
AO		 4659 if (off >= (bfd_vma) -2
4660 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 4661 abort ();
67a4f2b7
AO		 4662 if (r_type == R_386_TLS_GOTDESC
4663 || r_type == R_386_TLS_DESC_CALL)
4664 {
4665 relocation = htab->sgotplt_jump_table_size + offplt;
4666 unresolved_reloc = FALSE;
4667 }
4668 else if (r_type == ELF32_R_TYPE (rel->r_info))
13ae64f3 4669 {
6de2ae4a
L		 4670 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4671 + htab->elf.sgotplt->output_offset;
4672 relocation = htab->elf.sgot->output_section->vma
4673 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 4674 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4675 && tls_type == GOT_TLS_IE_BOTH)
4676 relocation += 4;
4677 if (r_type == R_386_TLS_IE)
8c37241b 4678 relocation += g_o_t;
b34976b6 4679 unresolved_reloc = FALSE;
13ae64f3 4680 }
67a4f2b7 4681 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
13ae64f3
JJ		 4682 {
4683 unsigned int val, type;
4684 bfd_vma roff;
4685
4686 /* GD->IE transition. */
13ae64f3 4687 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ		 4688 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4689 if (type == 0x04)
4690 {
4691 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4692 Change it into:
4693 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3 4694 val >>= 3;
142411ca 4695 roff = rel->r_offset - 3;
13ae64f3
JJ		 4696 }
4697 else
4698 {
4699 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4700 Change it into:
4701 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 4702 roff = rel->r_offset - 2;
4703 }
4704 memcpy (contents + roff,
4705 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4706 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 4707 /* If foo is used only with foo@gotntpoff(%reg) and
4708 foo@indntpoff, but not with foo@gottpoff(%reg), change
4709 subl $foo@gottpoff(%reg), %eax
4710 into:
4711 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 4712 if (tls_type == GOT_TLS_IE_POS)
4713 contents[roff + 6] = 0x03;
8c37241b 4714 bfd_put_32 (output_bfd,
6de2ae4a
L		 4715 htab->elf.sgot->output_section->vma
4716 + htab->elf.sgot->output_offset + off
4717 - htab->elf.sgotplt->output_section->vma
4718 - htab->elf.sgotplt->output_offset,
13ae64f3
JJ		 4719 contents + roff + 8);
4720 /* Skip R_386_PLT32. */
4721 rel++;
60f2e42e 4722 wrel++;
13ae64f3
JJ		 4723 continue;
4724 }
67a4f2b7
AO		 4725 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4726 {
4727 /* GDesc -> IE transition.
4728 It's originally something like:
4729 leal x@tlsdesc(%ebx), %eax
4730
4731 Change it to:
142411ca 4732 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 4733 or:
4734 movl x@gottpoff(%ebx), %eax # before negl %eax
4735
4736 Registers other than %eax may be set up here. */
4737
67a4f2b7
AO		 4738 bfd_vma roff;
4739
4740 /* First, make sure it's a leal adding ebx to a 32-bit
4741 offset into any register, although it's probably
4742 almost always going to be eax. */
4743 roff = rel->r_offset;
67a4f2b7
AO		 4744
4745 /* Now modify the instruction as appropriate. */
4746 /* To turn a leal into a movl in the form we use it, it
4747 suffices to change the first byte from 0x8d to 0x8b.
4748 aoliva FIXME: should we decide to keep the leal, all
4749 we have to do is remove the statement below, and
4750 adjust the relaxation of R_386_TLS_DESC_CALL. */
4751 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4752
4753 if (tls_type == GOT_TLS_IE_BOTH)
4754 off += 4;
4755
4756 bfd_put_32 (output_bfd,
6de2ae4a
L		 4757 htab->elf.sgot->output_section->vma
4758 + htab->elf.sgot->output_offset + off
4759 - htab->elf.sgotplt->output_section->vma
4760 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 4761 contents + roff);
4762 continue;
4763 }
4764 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4765 {
4766 /* GDesc -> IE transition.
4767 It's originally:
4768 call *(%eax)
4769
4770 Change it to:
142411ca 4771 xchg %ax,%ax
67a4f2b7
AO		 4772 or
4773 negl %eax
4774 depending on how we transformed the TLS_GOTDESC above.
4775 */
4776
67a4f2b7
AO		 4777 bfd_vma roff;
4778
67a4f2b7 4779 roff = rel->r_offset;
67a4f2b7
AO		 4780
4781 /* Now modify the instruction as appropriate. */
4782 if (tls_type != GOT_TLS_IE_NEG)
4783 {
10efb593
L		 4784 /* xchg %ax,%ax */
4785 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4786 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4787 }
4788 else
4789 {
4790 /* negl %eax */
4791 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4792 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4793 }
4794
4795 continue;
4796 }
4797 else
4798 BFD_ASSERT (FALSE);
13ae64f3
JJ		 4799 break;
4800
4801 case R_386_TLS_LDM:
142411ca
L		 4802 if (! elf_i386_tls_transition (info, input_bfd,
4803 input_section, contents,
4804 symtab_hdr, sym_hashes,
4805 &r_type, GOT_UNKNOWN, rel,
4c544807 4806 relend, h, r_symndx))
142411ca 4807 return FALSE;
13ae64f3 4808
142411ca
L		 4809 if (r_type != R_386_TLS_LDM)
4810 {
13ae64f3 4811 /* LD->LE transition:
13ae64f3
JJ		 4812 leal foo(%reg), %eax; call ___tls_get_addr.
4813 We change it into:
4814 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
142411ca 4815 BFD_ASSERT (r_type == R_386_TLS_LE_32);
13ae64f3
JJ		 4816 memcpy (contents + rel->r_offset - 2,
4817 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 4818 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 4819 rel++;
60f2e42e 4820 wrel++;
13ae64f3
JJ		 4821 continue;
4822 }
4823
6de2ae4a 4824 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4825 abort ();
4826
4827 off = htab->tls_ldm_got.offset;
4828 if (off & 1)
4829 off &= ~1;
4830 else
4831 {
947216bf 4832 Elf_Internal_Rela outrel;
13ae64f3 4833
6de2ae4a 4834 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4835 abort ();
4836
6de2ae4a
L		 4837 outrel.r_offset = (htab->elf.sgot->output_section->vma
4838 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 4839
4840 bfd_put_32 (output_bfd, 0,
6de2ae4a 4841 htab->elf.sgot->contents + off);
13ae64f3 4842 bfd_put_32 (output_bfd, 0,
6de2ae4a 4843 htab->elf.sgot->contents + off + 4);
13ae64f3 4844 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 4845 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
13ae64f3
JJ		 4846 htab->tls_ldm_got.offset |= 1;
4847 }
6de2ae4a
L		 4848 relocation = htab->elf.sgot->output_section->vma
4849 + htab->elf.sgot->output_offset + off
4850 - htab->elf.sgotplt->output_section->vma
4851 - htab->elf.sgotplt->output_offset;
b34976b6 4852 unresolved_reloc = FALSE;
13ae64f3
JJ		 4853 break;
4854
4855 case R_386_TLS_LDO_32:
0e1862bb
L		 4856 if (!bfd_link_executable (info)
4857 || (input_section->flags & SEC_CODE) == 0)
eb4ff4d6 4858 relocation -= elf_i386_dtpoff_base (info);
13ae64f3
JJ		 4859 else
4860 /* When converting LDO to LE, we must negate. */
eb4ff4d6 4861 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4862 break;
4863
4864 case R_386_TLS_LE_32:
13ae64f3 4865 case R_386_TLS_LE:
0e1862bb 4866 if (!bfd_link_executable (info))
37e55690 4867 {
947216bf 4868 Elf_Internal_Rela outrel;
37e55690 4869 asection *sreloc;
37e55690
JJ		 4870
4871 outrel.r_offset = rel->r_offset
4872 + input_section->output_section->vma
4873 + input_section->output_offset;
4874 if (h != NULL && h->dynindx != -1)
4875 indx = h->dynindx;
4876 else
4877 indx = 0;
4878 if (r_type == R_386_TLS_LE_32)
4879 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4880 else
4881 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4882 sreloc = elf_section_data (input_section)->sreloc;
4883 if (sreloc == NULL)
4884 abort ();
59d6ffb2 4885 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 4886 if (indx)
4887 continue;
4888 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 4889 relocation = elf_i386_dtpoff_base (info) - relocation;
37e55690 4890 else
eb4ff4d6 4891 relocation -= elf_i386_dtpoff_base (info);
37e55690
JJ		 4892 }
4893 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 4894 relocation = elf_i386_tpoff (info, relocation);
37e55690 4895 else
eb4ff4d6 4896 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4897 break;
4898
252b5132
RH		 4899 default:
4900 break;
4901 }
4902
239e1f3a
AM		 4903 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4904 because such sections are not SEC_ALLOC and thus ld.so will
4905 not process them. */
8c694914 4906 if (unresolved_reloc
239e1f3a 4907 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4908 && h->def_dynamic)
4909 && _bfd_elf_section_offset (output_bfd, info, input_section,
4910 rel->r_offset) != (bfd_vma) -1)
6a30718d
JJ		 4911 {
4912 (*_bfd_error_handler)
843fe662 4913 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 4914 input_bfd,
4915 input_section,
6a30718d 4916 (long) rel->r_offset,
843fe662 4917 howto->name,
6a30718d 4918 h->root.root.string);
b34976b6 4919 return FALSE;
6a30718d 4920 }
83be169b 4921
cbe950e9 4922do_relocation:
252b5132
RH		 4923 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4924 contents, rel->r_offset,
55fd94b0 4925 relocation, 0);
252b5132 4926
62d78908 4927check_relocation_error:
cf5c0c5b 4928 if (r != bfd_reloc_ok)
252b5132 4929 {
cf5c0c5b 4930 const char *name;
ffb2e45b 4931
cf5c0c5b
AM		 4932 if (h != NULL)
4933 name = h->root.root.string;
4934 else
4935 {
4936 name = bfd_elf_string_from_elf_section (input_bfd,
4937 symtab_hdr->sh_link,
4938 sym->st_name);
4939 if (name == NULL)
b34976b6 4940 return FALSE;
cf5c0c5b
AM		 4941 if (*name == '\0')
4942 name = bfd_section_name (input_bfd, sec);
4943 }
ffb2e45b 4944
cf5c0c5b
AM		 4945 if (r == bfd_reloc_overflow)
4946 {
cf5c0c5b 4947 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 4948 (info, (h ? &h->root : NULL), name, howto->name,
4949 (bfd_vma) 0, input_bfd, input_section,
4950 rel->r_offset)))
b34976b6 4951 return FALSE;
cf5c0c5b
AM		 4952 }
4953 else
4954 {
4955 (*_bfd_error_handler)
d003868e
AM		 4956 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4957 input_bfd, input_section,
cf5c0c5b 4958 (long) rel->r_offset, name, (int) r);
b34976b6 4959 return FALSE;
cf5c0c5b 4960 }
252b5132 4961 }
60f2e42e
L		 4962
4963 if (wrel != rel)
4964 *wrel = *rel;
4965 }
4966
4967 if (wrel != rel)
4968 {
4969 Elf_Internal_Shdr *rel_hdr;
4970 size_t deleted = rel - wrel;
4971
4972 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4973 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4974 if (rel_hdr->sh_size == 0)
4975 {
4976 /* It is too late to remove an empty reloc section. Leave
4977 one NONE reloc.
4978 ??? What is wrong with an empty section??? */
4979 rel_hdr->sh_size = rel_hdr->sh_entsize;
4980 deleted -= 1;
4981 }
4982 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4983 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4984 input_section->reloc_count -= deleted;
252b5132
RH		 4985 }
4986
b34976b6 4987 return TRUE;
252b5132
RH		 4988}
4989
4990/* Finish up dynamic symbol handling. We set the contents of various
4991 dynamic sections here. */
4992
b34976b6 4993static bfd_boolean
55fd94b0
AM		 4994elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4995 struct bfd_link_info *info,
4996 struct elf_link_hash_entry *h,
4997 Elf_Internal_Sym *sym)
252b5132 4998{
6725bdbf 4999 struct elf_i386_link_hash_table *htab;
25e762b9
RM		 5000 unsigned plt_entry_size;
5001 const struct elf_i386_backend_data *abed;
dd7e64d4 5002 struct elf_i386_link_hash_entry *eh;
aec6b87e 5003 bfd_boolean local_undefweak;
252b5132 5004
6725bdbf 5005 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 5006 if (htab == NULL)
5007 return FALSE;
252b5132 5008
25e762b9
RM		 5009 abed = get_elf_i386_backend_data (output_bfd);
5010 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
5011
dd7e64d4
L		 5012 eh = (struct elf_i386_link_hash_entry *) h;
5013
aec6b87e
L		 5014 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5015 resolved undefined weak symbols in executable so that their
5016 references have value 0 at run-time. */
5017 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
5018
252b5132
RH		 5019 if (h->plt.offset != (bfd_vma) -1)
5020 {
252b5132
RH		 5021 bfd_vma plt_index;
5022 bfd_vma got_offset;
947216bf
AM		 5023 Elf_Internal_Rela rel;
5024 bfd_byte *loc;
cbe950e9
L		 5025 asection *plt, *gotplt, *relplt;
5026
5027 /* When building a static executable, use .iplt, .igot.plt and
5028 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 5029 if (htab->elf.splt != NULL)
cbe950e9 5030 {
6de2ae4a
L		 5031 plt = htab->elf.splt;
5032 gotplt = htab->elf.sgotplt;
5033 relplt = htab->elf.srelplt;
cbe950e9
L		 5034 }
5035 else
5036 {
6de2ae4a
L		 5037 plt = htab->elf.iplt;
5038 gotplt = htab->elf.igotplt;
5039 relplt = htab->elf.irelplt;
cbe950e9 5040 }
252b5132
RH		 5041
5042 /* This symbol has an entry in the procedure linkage table. Set
5043 it up. */
5044
cbe950e9 5045 if ((h->dynindx == -1
aec6b87e 5046 && !local_undefweak
0e1862bb 5047 && !((h->forced_local || bfd_link_executable (info))
cbe950e9
L		 5048 && h->def_regular
5049 && h->type == STT_GNU_IFUNC))
5050 || plt == NULL
5051 || gotplt == NULL
5052 || relplt == NULL)
cec7f46a 5053 abort ();
252b5132
RH		 5054
5055 /* Get the index in the procedure linkage table which
5056 corresponds to this symbol. This is the index of this symbol
5057 in all the symbols for which we are making plt entries. The
cbe950e9 5058 first entry in the procedure linkage table is reserved.
252b5132 5059
cbe950e9 5060 Get the offset into the .got table of the entry that
252b5132 5061 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 5062 The first three are reserved.
6bbec505 5063
cbe950e9
L		 5064 For static executables, we don't reserve anything. */
5065
6de2ae4a 5066 if (plt == htab->elf.splt)
cbe950e9 5067 {
e1f98742
L		 5068 got_offset = h->plt.offset / plt_entry_size - 1;
5069 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 5070 }
5071 else
5072 {
e1f98742
L		 5073 got_offset = h->plt.offset / plt_entry_size;
5074 got_offset = got_offset * 4;
cbe950e9 5075 }
252b5132
RH		 5076
5077 /* Fill in the entry in the procedure linkage table. */
0e1862bb 5078 if (! bfd_link_pic (info))
252b5132 5079 {
25e762b9
RM		 5080 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
5081 abed->plt->plt_entry_size);
252b5132 5082 bfd_put_32 (output_bfd,
cbe950e9
L		 5083 (gotplt->output_section->vma
5084 + gotplt->output_offset
252b5132 5085 + got_offset),
25e762b9
RM		 5086 plt->contents + h->plt.offset
5087 + abed->plt->plt_got_offset);
eac338cf 5088
25e762b9 5089 if (abed->is_vxworks)
eac338cf
PB		 5090 {
5091 int s, k, reloc_index;
5092
5093 /* Create the R_386_32 relocation referencing the GOT
5094 for this PLT entry. */
5095
5096 /* S: Current slot number (zero-based). */
25e762b9
RM		 5097 s = ((h->plt.offset - abed->plt->plt_entry_size)
5098 / abed->plt->plt_entry_size);
eac338cf 5099 /* K: Number of relocations for PLTResolve. */
0e1862bb 5100 if (bfd_link_pic (info))
eac338cf
PB		 5101 k = PLTRESOLVE_RELOCS_SHLIB;
5102 else
5103 k = PLTRESOLVE_RELOCS;
5104 /* Skip the PLTresolve relocations, and the relocations for
5105 the other PLT slots. */
5106 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
5107 loc = (htab->srelplt2->contents + reloc_index
5108 * sizeof (Elf32_External_Rel));
5109
6de2ae4a
L		 5110 rel.r_offset = (htab->elf.splt->output_section->vma
5111 + htab->elf.splt->output_offset
eac338cf 5112 + h->plt.offset + 2),
7325306f 5113 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 5114 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5115
5116 /* Create the R_386_32 relocation referencing the beginning of
5117 the PLT for this GOT entry. */
6de2ae4a
L		 5118 rel.r_offset = (htab->elf.sgotplt->output_section->vma
5119 + htab->elf.sgotplt->output_offset
eac338cf 5120 + got_offset);
7325306f 5121 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 5122 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 5123 loc + sizeof (Elf32_External_Rel));
eac338cf 5124 }
252b5132
RH		 5125 }
5126 else
5127 {
25e762b9
RM		 5128 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
5129 abed->plt->plt_entry_size);
252b5132 5130 bfd_put_32 (output_bfd, got_offset,
25e762b9
RM		 5131 plt->contents + h->plt.offset
5132 + abed->plt->plt_got_offset);
252b5132
RH		 5133 }
5134
aec6b87e
L		 5135 /* Fill in the entry in the global offset table. Leave the entry
5136 as zero for undefined weak symbol in PIE. No PLT relocation
5137 against undefined weak symbol in PIE. */
5138 if (!local_undefweak)
cbe950e9 5139 {
cbe950e9 5140 bfd_put_32 (output_bfd,
aec6b87e
L		 5141 (plt->output_section->vma
5142 + plt->output_offset
5143 + h->plt.offset
5144 + abed->plt->plt_lazy_offset),
cbe950e9 5145 gotplt->contents + got_offset);
252b5132 5146
aec6b87e
L		 5147 /* Fill in the entry in the .rel.plt section. */
5148 rel.r_offset = (gotplt->output_section->vma
5149 + gotplt->output_offset
5150 + got_offset);
5151 if (h->dynindx == -1
5152 || ((bfd_link_executable (info)
5153 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5154 && h->def_regular
5155 && h->type == STT_GNU_IFUNC))
5156 {
5157 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5158 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5159 in the .got.plt section. */
5160 bfd_put_32 (output_bfd,
5161 (h->root.u.def.value
5162 + h->root.u.def.section->output_section->vma
5163 + h->root.u.def.section->output_offset),
5164 gotplt->contents + got_offset);
5165 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5166 /* R_386_IRELATIVE comes last. */
5167 plt_index = htab->next_irelative_index--;
5168 }
5169 else
5170 {
5171 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
5172 plt_index = htab->next_jump_slot_index++;
5173 }
5174
5175 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
5176 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5177
5178 /* Don't fill PLT entry for static executables. */
5179 if (plt == htab->elf.splt)
5180 {
5181 bfd_put_32 (output_bfd,
5182 plt_index * sizeof (Elf32_External_Rel),
5183 plt->contents + h->plt.offset
5184 + abed->plt->plt_reloc_offset);
5185 bfd_put_32 (output_bfd, - (h->plt.offset
5186 + abed->plt->plt_plt_offset + 4),
5187 plt->contents + h->plt.offset
5188 + abed->plt->plt_plt_offset);
5189 }
e1f98742 5190 }
dd7e64d4
L		 5191 }
5192 else if (eh->plt_got.offset != (bfd_vma) -1)
5193 {
5194 bfd_vma got_offset, plt_offset;
5195 asection *plt, *got, *gotplt;
5196 const bfd_byte *got_plt_entry;
5197
5198 /* Offset of displacement of the indirect jump. */
5199 bfd_vma plt_got_offset = 2;
e1f98742 5200
dd7e64d4
L		 5201 /* Set the entry in the GOT procedure linkage table. */
5202 plt = htab->plt_got;
5203 got = htab->elf.sgot;
5204 gotplt = htab->elf.sgotplt;
5205 got_offset = h->got.offset;
5206
5207 if (got_offset == (bfd_vma) -1
5208 || plt == NULL
5209 || got == NULL
5210 || gotplt == NULL)
5211 abort ();
5212
5213 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 5214 if (! bfd_link_pic (info))
252b5132 5215 {
dd7e64d4
L		 5216 got_plt_entry = elf_i386_got_plt_entry;
5217 got_offset += got->output_section->vma + got->output_offset;
252b5132 5218 }
dd7e64d4
L		 5219 else
5220 {
5221 got_plt_entry = elf_i386_pic_got_plt_entry;
5222 got_offset += (got->output_section->vma
5223 + got->output_offset
5224 - gotplt->output_section->vma
5225 - gotplt->output_offset);
5226 }
5227
5228 plt_offset = eh->plt_got.offset;
5229 memcpy (plt->contents + plt_offset, got_plt_entry,
5230 sizeof (elf_i386_got_plt_entry));
5231 bfd_put_32 (output_bfd, got_offset,
5232 plt->contents + plt_offset + plt_got_offset);
5233 }
5234
aec6b87e
L		 5235 if (!local_undefweak
5236 && !h->def_regular
dd7e64d4
L		 5237 && (h->plt.offset != (bfd_vma) -1
5238 || eh->plt_got.offset != (bfd_vma) -1))
5239 {
5240 /* Mark the symbol as undefined, rather than as defined in
5241 the .plt section. Leave the value if there were any
5242 relocations where pointer equality matters (this is a clue
5243 for the dynamic linker, to make function pointer
5244 comparisons work between an application and shared
5245 library), otherwise set it to zero. If a function is only
5246 called from a binary, there is no need to slow down
5247 shared libraries because of that. */
5248 sym->st_shndx = SHN_UNDEF;
5249 if (!h->pointer_equality_needed)
5250 sym->st_value = 0;
252b5132
RH		 5251 }
5252
aec6b87e
L		 5253 /* Don't generate dynamic GOT relocation against undefined weak
5254 symbol in executable. */
13ae64f3 5255 if (h->got.offset != (bfd_vma) -1
67a4f2b7 5256 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
aec6b87e
L		 5257 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
5258 && !local_undefweak)
252b5132 5259 {
947216bf 5260 Elf_Internal_Rela rel;
252b5132
RH		 5261
5262 /* This symbol has an entry in the global offset table. Set it
5263 up. */
5264
6de2ae4a 5265 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 5266 abort ();
252b5132 5267
6de2ae4a
L		 5268 rel.r_offset = (htab->elf.sgot->output_section->vma
5269 + htab->elf.sgot->output_offset
dc810e39 5270 + (h->got.offset & ~(bfd_vma) 1));
252b5132 5271
dd5724d5
AM		 5272 /* If this is a static link, or it is a -Bsymbolic link and the
5273 symbol is defined locally or was forced to be local because
5274 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 5275 The entry in the global offset table will already have been
5276 initialized in the relocate_section function. */
710ab287 5277 if (h->def_regular
0018b0a3
L		 5278 && h->type == STT_GNU_IFUNC)
5279 {
0e1862bb 5280 if (bfd_link_pic (info))
710ab287
L		 5281 {
5282 /* Generate R_386_GLOB_DAT. */
5283 goto do_glob_dat;
5284 }
5285 else
5286 {
cd2b2c10
L		 5287 asection *plt;
5288
710ab287
L		 5289 if (!h->pointer_equality_needed)
5290 abort ();
5291
5292 /* For non-shared object, we can't use .got.plt, which
5293 contains the real function addres if we need pointer
5294 equality. We load the GOT entry with the PLT entry. */
cd2b2c10 5295 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L		 5296 bfd_put_32 (output_bfd,
5297 (plt->output_section->vma
5298 + plt->output_offset + h->plt.offset),
6de2ae4a 5299 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 5300 return TRUE;
5301 }
0018b0a3 5302 }
0e1862bb 5303 else if (bfd_link_pic (info)
0018b0a3 5304 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 5305 {
6725bdbf 5306 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 5307 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
5308 }
252b5132
RH		 5309 else
5310 {
dd5724d5 5311 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 5312do_glob_dat:
6725bdbf 5313 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 5314 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 5315 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
5316 }
5317
59d6ffb2 5318 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
252b5132
RH		 5319 }
5320
f5385ebf 5321 if (h->needs_copy)
252b5132 5322 {
947216bf 5323 Elf_Internal_Rela rel;
252b5132
RH		 5324
5325 /* This symbol needs a copy reloc. Set it up. */
5326
ffb2e45b
AM		 5327 if (h->dynindx == -1
5328 || (h->root.type != bfd_link_hash_defined
5329 && h->root.type != bfd_link_hash_defweak)
5330 || htab->srelbss == NULL)
5331 abort ();
252b5132
RH		 5332
5333 rel.r_offset = (h->root.u.def.value
5334 + h->root.u.def.section->output_section->vma
5335 + h->root.u.def.section->output_offset);
5336 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
59d6ffb2 5337 elf_append_rel (output_bfd, htab->srelbss, &rel);
252b5132
RH		 5338 }
5339
b34976b6 5340 return TRUE;
252b5132
RH		 5341}
5342
c25bc9fc
L		 5343/* Finish up local dynamic symbol handling. We set the contents of
5344 various dynamic sections here. */
5345
5346static bfd_boolean
5347elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5348{
5349 struct elf_link_hash_entry *h
5350 = (struct elf_link_hash_entry *) *slot;
5351 struct bfd_link_info *info
23209a78 5352 = (struct bfd_link_info *) inf;
c25bc9fc
L		 5353
5354 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5355 h, NULL);
5356}
5357
aec6b87e
L		 5358/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5359 here since undefined weak symbol may not be dynamic and may not be
5360 called for elf_i386_finish_dynamic_symbol. */
5361
5362static bfd_boolean
5363elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5364 void *inf)
5365{
5366 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5367 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5368
5369 if (h->root.type != bfd_link_hash_undefweak
5370 || h->dynindx != -1)
5371 return TRUE;
5372
5373 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5374 info, h, NULL);
5375}
5376
38701953
AM		 5377/* Used to decide how to sort relocs in an optimal manner for the
5378 dynamic linker, before writing them out. */
5379
5380static enum elf_reloc_type_class
cae1fbbb 5381elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 5382 const asection *rel_sec ATTRIBUTE_UNUSED,
5383 const Elf_Internal_Rela *rela)
38701953 5384{
cae1fbbb
L		 5385 bfd *abfd = info->output_bfd;
5386 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5387 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 5388
d9e3b590
L		 5389 if (htab->dynsym != NULL
5390 && htab->dynsym->contents != NULL)
5391 {
5392 /* Check relocation against STT_GNU_IFUNC symbol if there are
5393 dynamic symbols. */
5394 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5395 Elf_Internal_Sym sym;
5396 if (!bed->s->swap_symbol_in (abfd,
5397 (htab->dynsym->contents
5398 + r_symndx * sizeof (Elf32_External_Sym)),
5399 0, &sym))
5400 abort ();
5401
5402 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5403 return reloc_class_ifunc;
5404 }
cae1fbbb 5405
55fd94b0 5406 switch (ELF32_R_TYPE (rela->r_info))
38701953
AM		 5407 {
5408 case R_386_RELATIVE:
5409 return reloc_class_relative;
5410 case R_386_JUMP_SLOT:
5411 return reloc_class_plt;
5412 case R_386_COPY:
5413 return reloc_class_copy;
5414 default:
5415 return reloc_class_normal;
5416 }
5417}
5418
252b5132
RH		 5419/* Finish up the dynamic sections. */
5420
b34976b6 5421static bfd_boolean
55fd94b0
AM		 5422elf_i386_finish_dynamic_sections (bfd *output_bfd,
5423 struct bfd_link_info *info)
252b5132 5424{
6725bdbf 5425 struct elf_i386_link_hash_table *htab;
252b5132 5426 bfd *dynobj;
252b5132 5427 asection *sdyn;
25e762b9 5428 const struct elf_i386_backend_data *abed;
252b5132 5429
6725bdbf 5430 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 5431 if (htab == NULL)
5432 return FALSE;
5433
ebe50bae 5434 dynobj = htab->elf.dynobj;
3d4d4302 5435 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
25e762b9 5436 abed = get_elf_i386_backend_data (output_bfd);
252b5132 5437
ebe50bae 5438 if (htab->elf.dynamic_sections_created)
252b5132 5439 {
252b5132
RH		 5440 Elf32_External_Dyn *dyncon, *dynconend;
5441
6de2ae4a 5442 if (sdyn == NULL || htab->elf.sgot == NULL)
ffb2e45b 5443 abort ();
252b5132
RH		 5444
5445 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 5446 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 5447 for (; dyncon < dynconend; dyncon++)
5448 {
5449 Elf_Internal_Dyn dyn;
51b64d56 5450 asection *s;
252b5132
RH		 5451
5452 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5453
5454 switch (dyn.d_tag)
5455 {
5456 default:
25e762b9
RM		 5457 if (abed->is_vxworks
5458 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7a2b07ff 5459 break;
0ac8d2ca 5460 continue;
252b5132
RH		 5461
5462 case DT_PLTGOT:
6de2ae4a 5463 s = htab->elf.sgotplt;
8c37241b 5464 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 5465 break;
5466
252b5132 5467 case DT_JMPREL:
6de2ae4a 5468 s = htab->elf.srelplt;
6348e046 5469 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 5470 break;
5471
5472 case DT_PLTRELSZ:
6de2ae4a 5473 s = htab->elf.srelplt;
eea6121a 5474 dyn.d_un.d_val = s->size;
252b5132
RH		 5475 break;
5476
5477 case DT_RELSZ:
5478 /* My reading of the SVR4 ABI indicates that the
5479 procedure linkage table relocs (DT_JMPREL) should be
5480 included in the overall relocs (DT_REL). This is
5481 what Solaris does. However, UnixWare can not handle
5482 that case. Therefore, we override the DT_RELSZ entry
6348e046 5483 here to make it not include the JMPREL relocs. */
6de2ae4a 5484 s = htab->elf.srelplt;
6348e046
AM		 5485 if (s == NULL)
5486 continue;
eea6121a 5487 dyn.d_un.d_val -= s->size;
6348e046
AM		 5488 break;
5489
5490 case DT_REL:
5491 /* We may not be using the standard ELF linker script.
5492 If .rel.plt is the first .rel section, we adjust
5493 DT_REL to not include it. */
6de2ae4a 5494 s = htab->elf.srelplt;
6348e046
AM		 5495 if (s == NULL)
5496 continue;
5497 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5498 continue;
eea6121a 5499 dyn.d_un.d_ptr += s->size;
252b5132
RH		 5500 break;
5501 }
0ac8d2ca
AM		 5502
5503 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 5504 }
5505
5506 /* Fill in the first entry in the procedure linkage table. */
6de2ae4a 5507 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 5508 {
0e1862bb 5509 if (bfd_link_pic (info))
eac338cf 5510 {
25e762b9
RM		 5511 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5512 abed->plt->plt0_entry_size);
5513 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5514 abed->plt0_pad_byte,
5515 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
eac338cf 5516 }
252b5132
RH		 5517 else
5518 {
25e762b9
RM		 5519 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5520 abed->plt->plt0_entry_size);
5521 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5522 abed->plt0_pad_byte,
5523 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
252b5132 5524 bfd_put_32 (output_bfd,
6de2ae4a
L		 5525 (htab->elf.sgotplt->output_section->vma
5526 + htab->elf.sgotplt->output_offset
6725bdbf 5527 + 4),
25e762b9
RM		 5528 htab->elf.splt->contents
5529 + abed->plt->plt0_got1_offset);
252b5132 5530 bfd_put_32 (output_bfd,
6de2ae4a
L		 5531 (htab->elf.sgotplt->output_section->vma
5532 + htab->elf.sgotplt->output_offset
6725bdbf 5533 + 8),
25e762b9
RM		 5534 htab->elf.splt->contents
5535 + abed->plt->plt0_got2_offset);
eac338cf 5536
25e762b9 5537 if (abed->is_vxworks)
eac338cf
PB		 5538 {
5539 Elf_Internal_Rela rel;
7325306f 5540
eac338cf
PB		 5541 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5542 On IA32 we use REL relocations so the addend goes in
5543 the PLT directly. */
6de2ae4a
L		 5544 rel.r_offset = (htab->elf.splt->output_section->vma
5545 + htab->elf.splt->output_offset
25e762b9 5546 + abed->plt->plt0_got1_offset);
7325306f 5547 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 5548 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5549 htab->srelplt2->contents);
5550 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
6de2ae4a
L		 5551 rel.r_offset = (htab->elf.splt->output_section->vma
5552 + htab->elf.splt->output_offset
25e762b9 5553 + abed->plt->plt0_got2_offset);
7325306f 5554 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 5555 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5556 htab->srelplt2->contents +
5557 sizeof (Elf32_External_Rel));
5558 }
252b5132
RH		 5559 }
5560
5561 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5562 really seem like the right value. */
6de2ae4a 5563 elf_section_data (htab->elf.splt->output_section)
6725bdbf 5564 ->this_hdr.sh_entsize = 4;
eac338cf
PB		 5565
5566 /* Correct the .rel.plt.unloaded relocations. */
0e1862bb 5567 if (abed->is_vxworks && !bfd_link_pic (info))
eac338cf 5568 {
25e762b9
RM		 5569 int num_plts = (htab->elf.splt->size
5570 / abed->plt->plt_entry_size) - 1;
4c9b0de6 5571 unsigned char *p;
eac338cf
PB		 5572
5573 p = htab->srelplt2->contents;
0e1862bb 5574 if (bfd_link_pic (info))
eac338cf
PB		 5575 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5576 else
5577 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5578
5579 for (; num_plts; num_plts--)
5580 {
5581 Elf_Internal_Rela rel;
5582 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 5583 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 5584 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5585 p += sizeof (Elf32_External_Rel);
5586
5587 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 5588 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf
PB		 5589 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5590 p += sizeof (Elf32_External_Rel);
5591 }
5592 }
252b5132
RH		 5593 }
5594 }
5595
6de2ae4a 5596 if (htab->elf.sgotplt)
252b5132 5597 {
56d4289c
L		 5598 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5599 {
5600 (*_bfd_error_handler)
5601 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5602 return FALSE;
5603 }
5604
12d0ee4a 5605 /* Fill in the first three entries in the global offset table. */
6de2ae4a 5606 if (htab->elf.sgotplt->size > 0)
12d0ee4a
AM		 5607 {
5608 bfd_put_32 (output_bfd,
55fd94b0 5609 (sdyn == NULL ? 0
12d0ee4a 5610 : sdyn->output_section->vma + sdyn->output_offset),
6de2ae4a
L		 5611 htab->elf.sgotplt->contents);
5612 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5613 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
12d0ee4a 5614 }
252b5132 5615
6de2ae4a 5616 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
12d0ee4a 5617 }
8c37241b 5618
e41b3a13 5619 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 5620 if (htab->plt_eh_frame != NULL
5621 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 5622 {
5623 if (htab->elf.splt != NULL
5624 && htab->elf.splt->size != 0
5625 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5626 && htab->elf.splt->output_section != NULL
5627 && htab->plt_eh_frame->output_section != NULL)
5628 {
5629 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5630 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5631 + htab->plt_eh_frame->output_offset
5632 + PLT_FDE_START_OFFSET;
5633 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5634 htab->plt_eh_frame->contents
5635 + PLT_FDE_START_OFFSET);
5636 }
5637 if (htab->plt_eh_frame->sec_info_type
dbaa2011 5638 == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 5639 {
5640 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5641 htab->plt_eh_frame,
5642 htab->plt_eh_frame->contents))
5643 return FALSE;
5644 }
5645 }
5646
6de2ae4a
L		 5647 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5648 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
8c37241b 5649
c25bc9fc
L		 5650 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5651 htab_traverse (htab->loc_hash_table,
5652 elf_i386_finish_local_dynamic_symbol,
5653 info);
5654
aec6b87e
L		 5655 /* Fill PLT entries for undefined weak symbols in PIE. */
5656 if (bfd_link_pie (info))
5657 bfd_hash_traverse (&info->hash->table,
5658 elf_i386_pie_finish_undefweak_symbol,
5659 info);
5660
b34976b6 5661 return TRUE;
252b5132
RH		 5662}
5663
3972882e 5664/* Return an array of PLT entry symbol values. */
4c45e5c9 5665
3972882e
L		 5666static bfd_vma *
5667elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5668 asection *relplt)
4c45e5c9 5669{
3972882e
L		 5670 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5671 arelent *p;
5672 long count, i;
5673 bfd_vma *plt_sym_val;
144bed8d 5674 bfd_vma plt_offset;
3972882e
L		 5675 bfd_byte *plt_contents;
5676 const struct elf_i386_backend_data *bed
5677 = get_elf_i386_backend_data (abfd);
5678 Elf_Internal_Shdr *hdr;
5679
5680 /* Get the .plt section contents. */
5681 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5682 if (plt_contents == NULL)
5683 return NULL;
5684 if (!bfd_get_section_contents (abfd, (asection *) plt,
5685 plt_contents, 0, plt->size))
5686 {
5687bad_return:
5688 free (plt_contents);
5689 return NULL;
5690 }
144bed8d 5691
3972882e
L		 5692 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5693 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5694 goto bad_return;
144bed8d 5695
3972882e
L		 5696 hdr = &elf_section_data (relplt)->this_hdr;
5697 count = relplt->size / hdr->sh_entsize;
5698
5699 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5700 if (plt_sym_val == NULL)
5701 goto bad_return;
cca5b8b6 5702
35181b3e 5703 for (i = 0; i < count; i++)
3972882e 5704 plt_sym_val[i] = -1;
cca5b8b6 5705
3972882e
L		 5706 plt_offset = bed->plt->plt_entry_size;
5707 p = relplt->relocation;
5708 for (i = 0; i < count; i++, p++)
144bed8d 5709 {
3972882e
L		 5710 long reloc_index;
5711
6f25f223 5712 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
533d0af0 5713 if (p->howto == NULL)
6f25f223 5714 continue;
533d0af0
L		 5715
5716 if (p->howto->type != R_386_JUMP_SLOT
5717 && p->howto->type != R_386_IRELATIVE)
3972882e
L		 5718 continue;
5719
5720 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5721 + bed->plt->plt_reloc_offset));
5722 reloc_index /= sizeof (Elf32_External_Rel);
ec1f73bb
AM		 5723 if (reloc_index < count)
5724 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5725
144bed8d 5726 plt_offset += bed->plt->plt_entry_size;
fca6ae69
L		 5727
5728 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5729 section. */
5730 if (plt_offset >= plt->size)
5731 break;
144bed8d
L		 5732 }
5733
3972882e
L		 5734 free (plt_contents);
5735
5736 return plt_sym_val;
5737}
5738
5739/* Similar to _bfd_elf_get_synthetic_symtab. */
5740
5741static long
5742elf_i386_get_synthetic_symtab (bfd *abfd,
5743 long symcount,
5744 asymbol **syms,
5745 long dynsymcount,
5746 asymbol **dynsyms,
5747 asymbol **ret)
5748{
5749 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5750 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5751 dynsymcount, dynsyms, ret,
5752 plt,
5753 elf_i386_get_plt_sym_val);
4c45e5c9
JJ		 5754}
5755
fdc90cb4
JJ		 5756/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5757
5758static bfd_boolean
5759elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5760{
5761 if (h->plt.offset != (bfd_vma) -1
5762 && !h->def_regular
5763 && !h->pointer_equality_needed)
5764 return FALSE;
5765
5766 return _bfd_elf_hash_symbol (h);
5767}
4c45e5c9 5768
d8045f23
NC		 5769/* Hook called by the linker routine which adds symbols from an object
5770 file. */
5771
5772static bfd_boolean
c16153ae 5773elf_i386_add_symbol_hook (bfd * abfd,
f1885d1e 5774 struct bfd_link_info * info,
d8045f23
NC		 5775 Elf_Internal_Sym * sym,
5776 const char ** namep ATTRIBUTE_UNUSED,
5777 flagword * flagsp ATTRIBUTE_UNUSED,
5778 asection ** secp ATTRIBUTE_UNUSED,
5779 bfd_vma * valp ATTRIBUTE_UNUSED)
5780{
13a2df29 5781 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
f1885d1e
AM		 5782 && (abfd->flags & DYNAMIC) == 0
5783 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
13a2df29
L		 5784 elf_tdata (info->output_bfd)->has_gnu_symbols
5785 |= elf_gnu_symbol_unique;
d8045f23
NC		 5786
5787 return TRUE;
5788}
5789
6d00b590 5790#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 5791#define TARGET_LITTLE_NAME "elf32-i386"
5792#define ELF_ARCH bfd_arch_i386
ae95ffa6 5793#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 5794#define ELF_MACHINE_CODE EM_386
5795#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 5796
5797#define elf_backend_can_gc_sections 1
51b64d56 5798#define elf_backend_can_refcount 1
252b5132
RH		 5799#define elf_backend_want_got_plt 1
5800#define elf_backend_plt_readonly 1
5801#define elf_backend_want_plt_sym 0
5802#define elf_backend_got_header_size 12
e41b3a13 5803#define elf_backend_plt_alignment 4
f7483970 5804#define elf_backend_extern_protected_data 1
252b5132 5805
8c29f035
AM		 5806/* Support RELA for objdump of prelink objects. */
5807#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 5808#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5809
13ae64f3 5810#define bfd_elf32_mkobject elf_i386_mkobject
13ae64f3 5811
dd5724d5
AM		 5812#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5813#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5814#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 5815#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 5816#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5
AM		 5817
5818#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
13285a1b 5819#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 5820#define elf_backend_check_relocs elf_i386_check_relocs
0ac8d2ca 5821#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6725bdbf 5822#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
0ac8d2ca 5823#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 5824#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5825#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5826#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
c5fccbec
DJ		 5827#define elf_backend_grok_prstatus elf_i386_grok_prstatus
5828#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 5829#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 5830#define elf_backend_relocate_section elf_i386_relocate_section
5831#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
67a4f2b7 5832#define elf_backend_always_size_sections elf_i386_always_size_sections
74541ad4
AM		 5833#define elf_backend_omit_section_dynsym \
5834 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
fdc90cb4 5835#define elf_backend_hash_symbol elf_i386_hash_symbol
d8045f23 5836#define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
aec6b87e 5837#define elf_backend_fixup_symbol elf_i386_fixup_symbol
dd5724d5 5838
252b5132 5839#include "elf32-target.h"
2bc3c89a
AM		 5840
5841/* FreeBSD support. */
5842
5843#undef TARGET_LITTLE_SYM
6d00b590 5844#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 5845#undef TARGET_LITTLE_NAME
5846#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 5847#undef ELF_OSABI
5848#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 5849
5850/* The kernel recognizes executables as valid only if they carry a
5851 "FreeBSD" label in the ELF header. So we put this label on all
5852 executables and (for simplicity) also all other object files. */
5853
2bc3c89a 5854static void
d8045f23 5855elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 5856{
78245035 5857 _bfd_elf_post_process_headers (abfd, info);
2bc3c89a 5858
2bc3c89a 5859#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 5860 {
5861 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5862 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5863 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5864 }
caf47ea6 5865#endif
2bc3c89a
AM		 5866}
5867
5868#undef elf_backend_post_process_headers
d8045f23 5869#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC		 5870#undef elf32_bed
5871#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 5872
d8045f23
NC		 5873#undef elf_backend_add_symbol_hook
5874
2bc3c89a 5875#include "elf32-target.h"
eac338cf 5876
a6cc6b3b
RO		 5877/* Solaris 2. */
5878
5879#undef TARGET_LITTLE_SYM
6d00b590 5880#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO		 5881#undef TARGET_LITTLE_NAME
5882#define TARGET_LITTLE_NAME "elf32-i386-sol2"
5883
914082d1
L		 5884#undef elf_backend_post_process_headers
5885
a6cc6b3b
RO		 5886/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5887 objects won't be recognized. */
5888#undef ELF_OSABI
5889
5890#undef elf32_bed
5891#define elf32_bed elf32_i386_sol2_bed
5892
7dc98aea
RO		 5893/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5894 boundary. */
84865015 5895#undef elf_backend_static_tls_alignment
7dc98aea
RO		 5896#define elf_backend_static_tls_alignment 8
5897
a6cc6b3b
RO		 5898/* The Solaris 2 ABI requires a plt symbol on all platforms.
5899
5900 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5901 File, p.63. */
84865015 5902#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 5903#define elf_backend_want_plt_sym 1
5904
84865015
NC		 5905#undef elf_backend_strtab_flags
5906#define elf_backend_strtab_flags SHF_STRINGS
5907
5522f910
NC		 5908/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
5909 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5910 FALSE otherwise. ISECTION is the best guess matching section from the
5911 input bfd IBFD, but it might be NULL. */
5912
84865015 5913static bfd_boolean
5522f910
NC		 5914elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5915 bfd *obfd ATTRIBUTE_UNUSED,
5916 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5917 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 5918{
5919 /* PR 19938: FIXME: Need to add code for setting the sh_info
5522f910
NC		 5920 and sh_link fields of Solaris specific section types. */
5921 return FALSE;
84865015 5922
5522f910 5923 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
84865015
NC		 5924 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
5925
5926http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
5927
5928 The following values should be set:
5929
5930Type Link Info
5931-----------------------------------------------------------------------------
5932SHT_SUNW_ancillary The section header index of 0
5933 [0x6fffffee] the associated string table.
5934
5935SHT_SUNW_capinfo The section header index of For a dynamic object, the
5936 [0x6ffffff0] the associated symbol table. section header index of
5937 the associated
5938 SHT_SUNW_capchain table,
5939 otherwise 0.
5940
5941SHT_SUNW_symsort The section header index of 0
5942 [0x6ffffff1] the associated symbol table.
5943
5944SHT_SUNW_tlssort The section header index of 0
5945 [0x6ffffff2] the associated symbol table.
5946
5947SHT_SUNW_LDYNSYM The section header index of One greater than the
5948 [0x6ffffff3] the associated string table. symbol table index of the
5949 This index is the same string last local symbol,
5950 table used by the SHT_DYNSYM STB_LOCAL. Since
5951 section. SHT_SUNW_LDYNSYM only
5952 contains local symbols,
5953 sh_info is equivalent to
5954 the number of symbols in
5955 the table.
5956
5957SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
5958 [0x6ffffff5] the section header index of to named strings, the
5959 the associated section header index of
5960 SHT_SUNW_capinfo table, the associated string
5961 otherwise 0. table, otherwise 0.
5962
5963SHT_SUNW_move The section header index of 0
5964 [0x6ffffffa] the associated symbol table.
5965
5966SHT_SUNW_COMDAT 0 0
5967 [0x6ffffffb]
5968
5969SHT_SUNW_syminfo The section header index of The section header index
5970 [0x6ffffffc] the associated symbol table. of the associated
5971 .dynamic section.
5972
5973SHT_SUNW_verdef The section header index of The number of version
5974 [0x6ffffffd] the associated string table. definitions within the
5975 section.
5976
5977SHT_SUNW_verneed The section header index of The number of version
5978 [0x6ffffffe] the associated string table. dependencies within the
5979 section.
5980
5981SHT_SUNW_versym The section header index of 0
5982 [0x6fffffff] the associated symbol table. */
84865015
NC		 5983}
5984
5522f910
NC		 5985#undef elf_backend_copy_special_section_fields
5986#define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
84865015 5987
a6cc6b3b
RO		 5988#include "elf32-target.h"
5989
bf64a951
L		 5990/* Intel MCU support. */
5991
5992static bfd_boolean
5993elf32_iamcu_elf_object_p (bfd *abfd)
5994{
5995 /* Set the right machine number for an IAMCU elf32 file. */
5996 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5997 return TRUE;
5998}
5999
6000#undef TARGET_LITTLE_SYM
6001#define TARGET_LITTLE_SYM iamcu_elf32_vec
6002#undef TARGET_LITTLE_NAME
6003#define TARGET_LITTLE_NAME "elf32-iamcu"
84865015 6004#undef ELF_ARCH
bf64a951
L		 6005#define ELF_ARCH bfd_arch_iamcu
6006
6007#undef ELF_MACHINE_CODE
6008#define ELF_MACHINE_CODE EM_IAMCU
6009
6010#undef ELF_OSABI
6011
6012#undef elf32_bed
6013#define elf32_bed elf32_iamcu_bed
6014
6015#undef elf_backend_object_p
6016#define elf_backend_object_p elf32_iamcu_elf_object_p
6017
6018#undef elf_backend_static_tls_alignment
6019
6020#undef elf_backend_want_plt_sym
6021#define elf_backend_want_plt_sym 0
6022
84865015 6023#undef elf_backend_strtab_flags
5522f910 6024#undef elf_backend_copy_special_section_fields
84865015 6025
bf64a951
L		 6026#include "elf32-target.h"
6027
6028/* Restore defaults. */
6029#undef ELF_ARCH
6030#define ELF_ARCH bfd_arch_i386
6031#undef ELF_MACHINE_CODE
6032#define ELF_MACHINE_CODE EM_386
6033
a27e4371
RM		 6034/* Native Client support. */
6035
6036#undef TARGET_LITTLE_SYM
6d00b590 6037#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 6038#undef TARGET_LITTLE_NAME
6039#define TARGET_LITTLE_NAME "elf32-i386-nacl"
6040#undef elf32_bed
6041#define elf32_bed elf32_i386_nacl_bed
6042
6043#undef ELF_MAXPAGESIZE
6044#define ELF_MAXPAGESIZE 0x10000
6045
6046/* Restore defaults. */
6047#undef ELF_OSABI
6048#undef elf_backend_want_plt_sym
6049#define elf_backend_want_plt_sym 0
6050#undef elf_backend_post_process_headers
a27e4371
RM		 6051#undef elf_backend_static_tls_alignment
6052
6053/* NaCl uses substantially different PLT entries for the same effects. */
6054
6055#undef elf_backend_plt_alignment
6056#define elf_backend_plt_alignment 5
6057#define NACL_PLT_ENTRY_SIZE 64
6058#define NACLMASK 0xe0 /* 32-byte alignment mask. */
6059
6060static const bfd_byte elf_i386_nacl_plt0_entry[] =
6061 {
6062 0xff, 0x35, /* pushl contents of address */
6063 0, 0, 0, 0, /* replaced with address of .got + 4. */
6064 0x8b, 0x0d, /* movl contents of address, %ecx */
6065 0, 0, 0, 0, /* replaced with address of .got + 8. */
6066 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6067 0xff, 0xe1 /* jmp *%ecx */
6068 };
6069
6070static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6071 {
6072 0x8b, 0x0d, /* movl contents of address, %ecx */
6073 0, 0, 0, 0, /* replaced with GOT slot address. */
6074 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6075 0xff, 0xe1, /* jmp *%ecx */
6076
6077 /* Pad to the next 32-byte boundary with nop instructions. */
6078 0x90,
6079 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6080 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6081
6082 /* Lazy GOT entries point here (32-byte aligned). */
6083 0x68, /* pushl immediate */
6084 0, 0, 0, 0, /* replaced with reloc offset. */
6085 0xe9, /* jmp relative */
6086 0, 0, 0, 0, /* replaced with offset to .plt. */
6087
6088 /* Pad to the next 32-byte boundary with nop instructions. */
6089 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6090 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6091 0x90, 0x90
6092 };
6093
6094static const bfd_byte
6095elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
6096 {
6097 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6098 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6099 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6100 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 6101
6102 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6103 so pad to that size with nop instructions. */
6104 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 6105 };
6106
6107static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
6108 {
6109 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6110 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6111 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6112 0xff, 0xe1, /* jmp *%ecx */
6113
6114 /* Pad to the next 32-byte boundary with nop instructions. */
6115 0x90,
6116 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6117 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6118
6119 /* Lazy GOT entries point here (32-byte aligned). */
6120 0x68, /* pushl immediate */
6121 0, 0, 0, 0, /* replaced with offset into relocation table. */
6122 0xe9, /* jmp relative */
6123 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6124
6125 /* Pad to the next 32-byte boundary with nop instructions. */
6126 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6127 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6128 0x90, 0x90
6129 };
6130
6131static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
6132 {
6133#if (PLT_CIE_LENGTH != 20 \
6134 || PLT_FDE_LENGTH != 36 \
6135 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6136 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6137# error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6138#endif
6139 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6140 0, 0, 0, 0, /* CIE ID */
6141 1, /* CIE version */
6142 'z', 'R', 0, /* Augmentation string */
6143 1, /* Code alignment factor */
6144 0x7c, /* Data alignment factor: -4 */
6145 8, /* Return address column */
6146 1, /* Augmentation size */
6147 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6148 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6149 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6150 DW_CFA_nop, DW_CFA_nop,
6151
6152 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6153 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
6154 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6155 0, 0, 0, 0, /* .plt size goes here */
6156 0, /* Augmentation size */
6157 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
6158 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6159 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
6160 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6161 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6162 13, /* Block length */
6163 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
6164 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
6165 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6166 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
6167 DW_CFA_nop, DW_CFA_nop
6168 };
6169
6170static const struct elf_i386_plt_layout elf_i386_nacl_plt =
6171 {
6172 elf_i386_nacl_plt0_entry, /* plt0_entry */
6173 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
6174 2, /* plt0_got1_offset */
6175 8, /* plt0_got2_offset */
6176 elf_i386_nacl_plt_entry, /* plt_entry */
6177 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6178 2, /* plt_got_offset */
6179 33, /* plt_reloc_offset */
6180 38, /* plt_plt_offset */
6181 32, /* plt_lazy_offset */
6182 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6183 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6184 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6185 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
6186 };
6187
6188static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6189 {
6190 &elf_i386_nacl_plt, /* plt */
6191 0x90, /* plt0_pad_byte: nop insn */
6192 0, /* is_vxworks */
6193 };
6194
64b384e1
RM		 6195static bfd_boolean
6196elf32_i386_nacl_elf_object_p (bfd *abfd)
6197{
6198 /* Set the right machine number for a NaCl i386 ELF32 file. */
6199 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6200 return TRUE;
6201}
6202
a27e4371
RM		 6203#undef elf_backend_arch_data
6204#define elf_backend_arch_data &elf_i386_nacl_arch_bed
6205
64b384e1
RM		 6206#undef elf_backend_object_p
6207#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 6208#undef elf_backend_modify_segment_map
6209#define elf_backend_modify_segment_map nacl_modify_segment_map
6210#undef elf_backend_modify_program_headers
6211#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 6212#undef elf_backend_final_write_processing
6213#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 6214
a27e4371
RM		 6215#include "elf32-target.h"
6216
5a68afcf 6217/* Restore defaults. */
64b384e1 6218#undef elf_backend_object_p
5a68afcf
RM		 6219#undef elf_backend_modify_segment_map
6220#undef elf_backend_modify_program_headers
887badb3 6221#undef elf_backend_final_write_processing
5a68afcf 6222
eac338cf
PB		 6223/* VxWorks support. */
6224
6225#undef TARGET_LITTLE_SYM
6d00b590 6226#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 6227#undef TARGET_LITTLE_NAME
6228#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 6229#undef ELF_OSABI
a27e4371
RM		 6230#undef elf_backend_plt_alignment
6231#define elf_backend_plt_alignment 4
eac338cf 6232
23209a78
RM		 6233static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6234 {
25e762b9 6235 &elf_i386_plt, /* plt */
23209a78
RM		 6236 0x90, /* plt0_pad_byte */
6237 1, /* is_vxworks */
6238 };
eac338cf 6239
23209a78
RM		 6240#undef elf_backend_arch_data
6241#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 6242
13285a1b 6243#undef elf_backend_relocs_compatible
eac338cf
PB		 6244#undef elf_backend_add_symbol_hook
6245#define elf_backend_add_symbol_hook \
6246 elf_vxworks_add_symbol_hook
6247#undef elf_backend_link_output_symbol_hook
6248#define elf_backend_link_output_symbol_hook \
9c72ff84 6249 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 6250#undef elf_backend_emit_relocs
6251#define elf_backend_emit_relocs elf_vxworks_emit_relocs
6252#undef elf_backend_final_write_processing
6253#define elf_backend_final_write_processing \
6254 elf_vxworks_final_write_processing
7dc98aea 6255#undef elf_backend_static_tls_alignment
eac338cf
PB		 6256
6257/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6258 define it. */
6259#undef elf_backend_want_plt_sym
6260#define elf_backend_want_plt_sym 1
6261
6262#undef elf32_bed
6263#define elf32_bed elf32_i386_vxworks_bed
6264
6265#include "elf32-target.h"
GDB Binutils - Deliverables
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