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[x86] Resolve non-PIC undefweak symbols in executable
[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;
6725bdbf 881};
252b5132
RH		 882
883/* Get the i386 ELF linker hash table from a link_info structure. */
884
885#define elf_i386_hash_table(p) \
4dfe6ac6
NC		 886 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
887 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
252b5132 888
67a4f2b7 889#define elf_i386_compute_jump_table_size(htab) \
998d811a 890 ((htab)->elf.srelplt->reloc_count * 4)
67a4f2b7 891
252b5132
RH		 892/* Create an entry in an i386 ELF linker hash table. */
893
894static struct bfd_hash_entry *
eb4ff4d6
L		 895elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
896 struct bfd_hash_table *table,
897 const char *string)
252b5132 898{
252b5132
RH		 899 /* Allocate the structure if it has not already been allocated by a
900 subclass. */
ebe50bae
AM		 901 if (entry == NULL)
902 {
a50b1753
NC		 903 entry = (struct bfd_hash_entry *)
904 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
ebe50bae
AM		 905 if (entry == NULL)
906 return entry;
907 }
252b5132
RH		 908
909 /* Call the allocation method of the superclass. */
ebe50bae
AM		 910 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
911 if (entry != NULL)
252b5132 912 {
ebe50bae
AM		 913 struct elf_i386_link_hash_entry *eh;
914
915 eh = (struct elf_i386_link_hash_entry *) entry;
916 eh->dyn_relocs = NULL;
13ae64f3 917 eh->tls_type = GOT_UNKNOWN;
d5597ebc 918 eh->gotoff_ref = 0;
aec6b87e
L		 919 eh->has_got_reloc = 0;
920 eh->has_non_got_reloc = 0;
04ebc307 921 eh->func_pointer_refcount = 0;
dd7e64d4 922 eh->plt_got.offset = (bfd_vma) -1;
67a4f2b7 923 eh->tlsdesc_got = (bfd_vma) -1;
252b5132
RH		 924 }
925
ebe50bae 926 return entry;
252b5132
RH		 927}
928
c25bc9fc
L		 929/* Compute a hash of a local hash entry. We use elf_link_hash_entry
930 for local symbol so that we can handle local STT_GNU_IFUNC symbols
931 as global symbol. We reuse indx and dynstr_index for local symbol
932 hash since they aren't used by global symbols in this backend. */
933
934static hashval_t
935elf_i386_local_htab_hash (const void *ptr)
936{
937 struct elf_link_hash_entry *h
938 = (struct elf_link_hash_entry *) ptr;
d2149d72 939 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L		 940}
941
942/* Compare local hash entries. */
943
944static int
945elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
946{
947 struct elf_link_hash_entry *h1
948 = (struct elf_link_hash_entry *) ptr1;
949 struct elf_link_hash_entry *h2
950 = (struct elf_link_hash_entry *) ptr2;
951
952 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
953}
954
955/* Find and/or create a hash entry for local symbol. */
956
957static struct elf_link_hash_entry *
958elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
959 bfd *abfd, const Elf_Internal_Rela *rel,
960 bfd_boolean create)
961{
962 struct elf_i386_link_hash_entry e, *ret;
963 asection *sec = abfd->sections;
d2149d72
L		 964 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
965 ELF32_R_SYM (rel->r_info));
c25bc9fc
L		 966 void **slot;
967
968 e.elf.indx = sec->id;
969 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
970 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
971 create ? INSERT : NO_INSERT);
972
973 if (!slot)
974 return NULL;
975
976 if (*slot)
977 {
978 ret = (struct elf_i386_link_hash_entry *) *slot;
979 return &ret->elf;
980 }
981
982 ret = (struct elf_i386_link_hash_entry *)
983 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
984 sizeof (struct elf_i386_link_hash_entry));
985 if (ret)
986 {
987 memset (ret, 0, sizeof (*ret));
988 ret->elf.indx = sec->id;
989 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
990 ret->elf.dynindx = -1;
04ebc307 991 ret->func_pointer_refcount = 0;
dd7e64d4 992 ret->plt_got.offset = (bfd_vma) -1;
c25bc9fc
L		 993 *slot = ret;
994 }
995 return &ret->elf;
996}
997
68faa637
AM		 998/* Destroy an i386 ELF linker hash table. */
999
1000static void
d495ab0d 1001elf_i386_link_hash_table_free (bfd *obfd)
68faa637
AM		 1002{
1003 struct elf_i386_link_hash_table *htab
d495ab0d 1004 = (struct elf_i386_link_hash_table *) obfd->link.hash;
68faa637
AM		 1005
1006 if (htab->loc_hash_table)
1007 htab_delete (htab->loc_hash_table);
1008 if (htab->loc_hash_memory)
1009 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
d495ab0d 1010 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 1011}
1012
252b5132
RH		 1013/* Create an i386 ELF linker hash table. */
1014
1015static struct bfd_link_hash_table *
55fd94b0 1016elf_i386_link_hash_table_create (bfd *abfd)
252b5132
RH		 1017{
1018 struct elf_i386_link_hash_table *ret;
dc810e39 1019 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
252b5132 1020
7bf52ea2 1021 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
ebe50bae 1022 if (ret == NULL)
252b5132
RH		 1023 return NULL;
1024
eb4ff4d6
L		 1025 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1026 elf_i386_link_hash_newfunc,
4dfe6ac6
NC		 1027 sizeof (struct elf_i386_link_hash_entry),
1028 I386_ELF_DATA))
252b5132 1029 {
e2d34d7d 1030 free (ret);
252b5132
RH		 1031 return NULL;
1032 }
1033
c25bc9fc
L		 1034 ret->loc_hash_table = htab_try_create (1024,
1035 elf_i386_local_htab_hash,
1036 elf_i386_local_htab_eq,
1037 NULL);
1038 ret->loc_hash_memory = objalloc_create ();
1039 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1040 {
d495ab0d 1041 elf_i386_link_hash_table_free (abfd);
c25bc9fc
L		 1042 return NULL;
1043 }
d495ab0d 1044 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
c25bc9fc 1045
ebe50bae 1046 return &ret->elf.root;
252b5132
RH		 1047}
1048
6725bdbf
AM		 1049/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1050 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1051 hash table. */
1052
b34976b6 1053static bfd_boolean
55fd94b0 1054elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM		 1055{
1056 struct elf_i386_link_hash_table *htab;
1057
6725bdbf 1058 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 1059 return FALSE;
6725bdbf 1060
6de2ae4a 1061 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 1062 if (htab == NULL)
1063 return FALSE;
1064
3d4d4302 1065 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
d5597ebc 1066 if (!htab->sdynbss)
6725bdbf
AM		 1067 abort ();
1068
0e1862bb 1069 if (bfd_link_executable (info))
d5597ebc
L		 1070 {
1071 /* Always allow copy relocs for building executables. */
1072 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1073 if (s == NULL)
1074 {
1075 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1076 s = bfd_make_section_anyway_with_flags (dynobj,
1077 ".rel.bss",
1078 (bed->dynamic_sec_flags
1079 | SEC_READONLY));
1080 if (s == NULL
1081 || ! bfd_set_section_alignment (dynobj, s,
1082 bed->s->log_file_align))
1083 return FALSE;
1084 }
1085 htab->srelbss = s;
1086 }
1087
23209a78 1088 if (get_elf_i386_backend_data (dynobj)->is_vxworks
6de2ae4a
L		 1089 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1090 &htab->srelplt2))
711de32c 1091 return FALSE;
eac338cf 1092
e41b3a13 1093 if (!info->no_ld_generated_unwind_info
2fe0fd06 1094 && htab->plt_eh_frame == NULL
e4de50d4 1095 && htab->elf.splt != NULL)
e41b3a13 1096 {
bbf96e4e
L		 1097 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1098 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1099 | SEC_LINKER_CREATED);
e41b3a13 1100 htab->plt_eh_frame
bbf96e4e 1101 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ		 1102 if (htab->plt_eh_frame == NULL
1103 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1104 return FALSE;
e41b3a13
JJ		 1105 }
1106
b34976b6 1107 return TRUE;
6725bdbf
AM		 1108}
1109
ebe50bae
AM		 1110/* Copy the extra info we tack onto an elf_link_hash_entry. */
1111
51b64d56 1112static void
fcfa13d2 1113elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
55fd94b0
AM		 1114 struct elf_link_hash_entry *dir,
1115 struct elf_link_hash_entry *ind)
ebe50bae
AM		 1116{
1117 struct elf_i386_link_hash_entry *edir, *eind;
1118
1119 edir = (struct elf_i386_link_hash_entry *) dir;
1120 eind = (struct elf_i386_link_hash_entry *) ind;
1121
bbd7ec4a 1122 if (eind->dyn_relocs != NULL)
ebe50bae 1123 {
bbd7ec4a
AM		 1124 if (edir->dyn_relocs != NULL)
1125 {
e03a8ed8
L		 1126 struct elf_dyn_relocs **pp;
1127 struct elf_dyn_relocs *p;
bbd7ec4a 1128
fcfa13d2 1129 /* Add reloc counts against the indirect sym to the direct sym
bbd7ec4a
AM		 1130 list. Merge any entries against the same section. */
1131 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1132 {
e03a8ed8 1133 struct elf_dyn_relocs *q;
bbd7ec4a
AM		 1134
1135 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1136 if (q->sec == p->sec)
1137 {
1138 q->pc_count += p->pc_count;
1139 q->count += p->count;
1140 *pp = p->next;
1141 break;
1142 }
1143 if (q == NULL)
1144 pp = &p->next;
1145 }
1146 *pp = edir->dyn_relocs;
1147 }
1148
ebe50bae
AM		 1149 edir->dyn_relocs = eind->dyn_relocs;
1150 eind->dyn_relocs = NULL;
1151 }
ebe50bae 1152
cd67d266
JJ		 1153 if (ind->root.type == bfd_link_hash_indirect
1154 && dir->got.refcount <= 0)
1155 {
1156 edir->tls_type = eind->tls_type;
1157 eind->tls_type = GOT_UNKNOWN;
1158 }
81848ca0 1159
d5597ebc
L		 1160 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1161 generate a R_386_COPY reloc. */
1162 edir->gotoff_ref |= eind->gotoff_ref;
1163
aec6b87e
L		 1164 edir->has_got_reloc |= eind->has_got_reloc;
1165 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1166
81848ca0
AM		 1167 if (ELIMINATE_COPY_RELOCS
1168 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 1169 && dir->dynamic_adjusted)
1170 {
1171 /* If called to transfer flags for a weakdef during processing
1172 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1173 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1174 dir->ref_dynamic |= ind->ref_dynamic;
1175 dir->ref_regular |= ind->ref_regular;
1176 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1177 dir->needs_plt |= ind->needs_plt;
1178 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1179 }
81848ca0 1180 else
04ebc307
L		 1181 {
1182 if (eind->func_pointer_refcount > 0)
1183 {
1184 edir->func_pointer_refcount += eind->func_pointer_refcount;
1185 eind->func_pointer_refcount = 0;
1186 }
1187
1188 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1189 }
ebe50bae
AM		 1190}
1191
142411ca
L		 1192/* Return TRUE if the TLS access code sequence support transition
1193 from R_TYPE. */
1194
1195static bfd_boolean
1196elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1197 bfd_byte *contents,
1198 Elf_Internal_Shdr *symtab_hdr,
1199 struct elf_link_hash_entry **sym_hashes,
1200 unsigned int r_type,
1201 const Elf_Internal_Rela *rel,
1202 const Elf_Internal_Rela *relend)
13ae64f3 1203{
142411ca
L		 1204 unsigned int val, type;
1205 unsigned long r_symndx;
1206 struct elf_link_hash_entry *h;
1207 bfd_vma offset;
1208
1209 /* Get the section contents. */
1210 if (contents == NULL)
1211 {
1212 if (elf_section_data (sec)->this_hdr.contents != NULL)
1213 contents = elf_section_data (sec)->this_hdr.contents;
1214 else
1215 {
1216 /* FIXME: How to better handle error condition? */
1217 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1218 return FALSE;
13ae64f3 1219
142411ca
L		 1220 /* Cache the section contents for elf_link_input_bfd. */
1221 elf_section_data (sec)->this_hdr.contents = contents;
1222 }
1223 }
1224
1225 offset = rel->r_offset;
13ae64f3 1226 switch (r_type)
142411ca
L		 1227 {
1228 case R_386_TLS_GD:
1229 case R_386_TLS_LDM:
1230 if (offset < 2 || (rel + 1) >= relend)
1231 return FALSE;
1232
1233 type = bfd_get_8 (abfd, contents + offset - 2);
1234 if (r_type == R_386_TLS_GD)
1235 {
09e8c3bf 1236 /* Check transition from GD access model. Only
142411ca
L		 1237 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1238 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1239 can transit to different access model. */
1240 if ((offset + 10) > sec->size ||
1241 (type != 0x8d && type != 0x04))
1242 return FALSE;
1243
1244 val = bfd_get_8 (abfd, contents + offset - 1);
1245 if (type == 0x04)
1246 {
1247 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1248 if (offset < 3)
1249 return FALSE;
1250
1251 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1252 return FALSE;
1253
1254 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1255 return FALSE;
1256 }
1257 else
1258 {
1259 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1260 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1261 return FALSE;
1262
1263 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1264 return FALSE;
1265 }
1266 }
1267 else
1268 {
1269 /* Check transition from LD access model. Only
1270 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1271 can transit to different access model. */
1272 if (type != 0x8d || (offset + 9) > sec->size)
1273 return FALSE;
1274
1275 val = bfd_get_8 (abfd, contents + offset - 1);
1276 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1277 return FALSE;
1278 }
1279
1280 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1281 return FALSE;
1282
1283 r_symndx = ELF32_R_SYM (rel[1].r_info);
1284 if (r_symndx < symtab_hdr->sh_info)
1285 return FALSE;
1286
1287 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b
L		 1288 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1289 may be versioned. */
142411ca
L		 1290 return (h != NULL
1291 && h->root.root.string != NULL
1292 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1293 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
c4fb387b
L		 1294 && (strncmp (h->root.root.string, "___tls_get_addr",
1295 15) == 0));
142411ca
L		 1296
1297 case R_386_TLS_IE:
1298 /* Check transition from IE access model:
1299 movl foo@indntpoff(%rip), %eax
1300 movl foo@indntpoff(%rip), %reg
1301 addl foo@indntpoff(%rip), %reg
1302 */
1303
1304 if (offset < 1 || (offset + 4) > sec->size)
1305 return FALSE;
1306
1307 /* Check "movl foo@tpoff(%rip), %eax" first. */
1308 val = bfd_get_8 (abfd, contents + offset - 1);
1309 if (val == 0xa1)
1310 return TRUE;
1311
1312 if (offset < 2)
1313 return FALSE;
1314
1315 /* Check movl|addl foo@tpoff(%rip), %reg. */
1316 type = bfd_get_8 (abfd, contents + offset - 2);
1317 return ((type == 0x8b || type == 0x03)
1318 && (val & 0xc7) == 0x05);
1319
1320 case R_386_TLS_GOTIE:
1321 case R_386_TLS_IE_32:
1322 /* Check transition from {IE_32,GOTIE} access model:
1323 subl foo@{tpoff,gontoff}(%reg1), %reg2
1324 movl foo@{tpoff,gontoff}(%reg1), %reg2
1325 addl foo@{tpoff,gontoff}(%reg1), %reg2
1326 */
1327
1328 if (offset < 2 || (offset + 4) > sec->size)
1329 return FALSE;
1330
1331 val = bfd_get_8 (abfd, contents + offset - 1);
1332 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1333 return FALSE;
1334
1335 type = bfd_get_8 (abfd, contents + offset - 2);
1336 return type == 0x8b || type == 0x2b || type == 0x03;
1337
1338 case R_386_TLS_GOTDESC:
1339 /* Check transition from GDesc access model:
1340 leal x@tlsdesc(%ebx), %eax
1341
1342 Make sure it's a leal adding ebx to a 32-bit offset
1343 into any register, although it's probably almost always
1344 going to be eax. */
1345
1346 if (offset < 2 || (offset + 4) > sec->size)
1347 return FALSE;
1348
1349 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1350 return FALSE;
1351
1352 val = bfd_get_8 (abfd, contents + offset - 1);
1353 return (val & 0xc7) == 0x83;
1354
1355 case R_386_TLS_DESC_CALL:
1356 /* Check transition from GDesc access model:
1357 call *x@tlsdesc(%rax)
1358 */
1359 if (offset + 2 <= sec->size)
1360 {
1361 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM		 1362 static const unsigned char call[] = { 0xff, 0x10 };
1363 return memcmp (contents + offset, call, 2) == 0;
142411ca
L		 1364 }
1365
1366 return FALSE;
1367
1368 default:
1369 abort ();
1370 }
1371}
1372
1373/* Return TRUE if the TLS access transition is OK or no transition
1374 will be performed. Update R_TYPE if there is a transition. */
1375
1376static bfd_boolean
1377elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1378 asection *sec, bfd_byte *contents,
1379 Elf_Internal_Shdr *symtab_hdr,
1380 struct elf_link_hash_entry **sym_hashes,
1381 unsigned int *r_type, int tls_type,
1382 const Elf_Internal_Rela *rel,
1383 const Elf_Internal_Rela *relend,
4c544807
L		 1384 struct elf_link_hash_entry *h,
1385 unsigned long r_symndx)
142411ca
L		 1386{
1387 unsigned int from_type = *r_type;
1388 unsigned int to_type = from_type;
1389 bfd_boolean check = TRUE;
1390
bb1cb422
L		 1391 /* Skip TLS transition for functions. */
1392 if (h != NULL
1393 && (h->type == STT_FUNC
1394 || h->type == STT_GNU_IFUNC))
1395 return TRUE;
1396
142411ca 1397 switch (from_type)
13ae64f3
JJ		 1398 {
1399 case R_386_TLS_GD:
67a4f2b7
AO		 1400 case R_386_TLS_GOTDESC:
1401 case R_386_TLS_DESC_CALL:
13ae64f3 1402 case R_386_TLS_IE_32:
37e55690
JJ		 1403 case R_386_TLS_IE:
1404 case R_386_TLS_GOTIE:
0e1862bb 1405 if (bfd_link_executable (info))
142411ca
L		 1406 {
1407 if (h == NULL)
1408 to_type = R_386_TLS_LE_32;
1409 else if (from_type != R_386_TLS_IE
1410 && from_type != R_386_TLS_GOTIE)
1411 to_type = R_386_TLS_IE_32;
1412 }
1413
1414 /* When we are called from elf_i386_relocate_section, CONTENTS
1415 isn't NULL and there may be additional transitions based on
1416 TLS_TYPE. */
1417 if (contents != NULL)
1418 {
1419 unsigned int new_to_type = to_type;
1420
0e1862bb 1421 if (bfd_link_executable (info)
142411ca
L		 1422 && h != NULL
1423 && h->dynindx == -1
1424 && (tls_type & GOT_TLS_IE))
1425 new_to_type = R_386_TLS_LE_32;
1426
1427 if (to_type == R_386_TLS_GD
1428 || to_type == R_386_TLS_GOTDESC
1429 || to_type == R_386_TLS_DESC_CALL)
1430 {
1431 if (tls_type == GOT_TLS_IE_POS)
1432 new_to_type = R_386_TLS_GOTIE;
1433 else if (tls_type & GOT_TLS_IE)
1434 new_to_type = R_386_TLS_IE_32;
1435 }
1436
1437 /* We checked the transition before when we were called from
1438 elf_i386_check_relocs. We only want to check the new
1439 transition which hasn't been checked before. */
1440 check = new_to_type != to_type && from_type == to_type;
1441 to_type = new_to_type;
1442 }
1443
1444 break;
1445
13ae64f3 1446 case R_386_TLS_LDM:
0e1862bb 1447 if (bfd_link_executable (info))
142411ca
L		 1448 to_type = R_386_TLS_LE_32;
1449 break;
1450
1451 default:
1452 return TRUE;
1453 }
1454
1455 /* Return TRUE if there is no transition. */
1456 if (from_type == to_type)
1457 return TRUE;
1458
1459 /* Check if the transition can be performed. */
1460 if (check
1461 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1462 symtab_hdr, sym_hashes,
1463 from_type, rel, relend))
1464 {
2f629d23 1465 reloc_howto_type *from, *to;
4c544807 1466 const char *name;
142411ca
L		 1467
1468 from = elf_i386_rtype_to_howto (abfd, from_type);
1469 to = elf_i386_rtype_to_howto (abfd, to_type);
1470
4c544807
L		 1471 if (h)
1472 name = h->root.root.string;
1473 else
1474 {
4c544807 1475 struct elf_i386_link_hash_table *htab;
4dfe6ac6 1476
4c544807 1477 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 1478 if (htab == NULL)
1479 name = "*unknown*";
1480 else
1481 {
1482 Elf_Internal_Sym *isym;
1483
1484 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1485 abfd, r_symndx);
1486 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1487 }
4c544807
L		 1488 }
1489
142411ca
L		 1490 (*_bfd_error_handler)
1491 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1492 "in section `%A' failed"),
4c544807 1493 abfd, sec, from->name, to->name, name,
142411ca
L		 1494 (unsigned long) rel->r_offset);
1495 bfd_set_error (bfd_error_bad_value);
1496 return FALSE;
13ae64f3
JJ		 1497 }
1498
142411ca
L		 1499 *r_type = to_type;
1500 return TRUE;
13ae64f3
JJ		 1501}
1502
c1d11331
L		 1503/* Rename some of the generic section flags to better document how they
1504 are used here. */
02a86693 1505#define need_convert_load sec_flg0
c1d11331 1506
252b5132 1507/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1508 calculate needed space in the global offset table, procedure linkage
1509 table, and dynamic reloc sections. */
252b5132 1510
b34976b6 1511static bfd_boolean
55fd94b0
AM		 1512elf_i386_check_relocs (bfd *abfd,
1513 struct bfd_link_info *info,
1514 asection *sec,
1515 const Elf_Internal_Rela *relocs)
252b5132 1516{
6725bdbf 1517 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1518 Elf_Internal_Shdr *symtab_hdr;
1519 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1520 const Elf_Internal_Rela *rel;
1521 const Elf_Internal_Rela *rel_end;
252b5132 1522 asection *sreloc;
dd7e64d4 1523 bfd_boolean use_plt_got;
252b5132 1524
0e1862bb 1525 if (bfd_link_relocatable (info))
b34976b6 1526 return TRUE;
252b5132 1527
0ffa91dd
NC		 1528 BFD_ASSERT (is_i386_elf (abfd));
1529
6725bdbf 1530 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 1531 if (htab == NULL)
1532 return FALSE;
1533
dd7e64d4
L		 1534 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1535 && (get_elf_i386_backend_data (abfd)
1536 == &elf_i386_arch_bed));
1537
0ffa91dd 1538 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1539 sym_hashes = elf_sym_hashes (abfd);
252b5132 1540
252b5132
RH		 1541 sreloc = NULL;
1542
1543 rel_end = relocs + sec->reloc_count;
1544 for (rel = relocs; rel < rel_end; rel++)
1545 {
13ae64f3 1546 unsigned int r_type;
252b5132
RH		 1547 unsigned long r_symndx;
1548 struct elf_link_hash_entry *h;
d5597ebc 1549 struct elf_i386_link_hash_entry *eh;
4c544807
L		 1550 Elf_Internal_Sym *isym;
1551 const char *name;
06a6a421 1552 bfd_boolean size_reloc;
252b5132
RH		 1553
1554 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1555 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1556
d9bc7a44 1557 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1558 {
d003868e
AM		 1559 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1560 abfd,
8f615d07 1561 r_symndx);
b34976b6 1562 return FALSE;
f5f31454
L		 1563 }
1564
252b5132 1565 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1566 {
1567 /* A local symbol. */
c2e61a4e
L		 1568 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1569 abfd, r_symndx);
1570 if (isym == NULL)
1571 return FALSE;
c25bc9fc
L		 1572
1573 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1574 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1575 {
9fff0c39 1576 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1577 if (h == NULL)
c2e61a4e 1578 return FALSE;
6bbec505 1579
c25bc9fc
L		 1580 /* Fake a STT_GNU_IFUNC symbol. */
1581 h->type = STT_GNU_IFUNC;
1582 h->def_regular = 1;
1583 h->ref_regular = 1;
1584 h->forced_local = 1;
1585 h->root.type = bfd_link_hash_defined;
1586 }
1587 else
1588 h = NULL;
1589 }
252b5132 1590 else
71cb9464 1591 {
4c544807 1592 isym = NULL;
71cb9464
L		 1593 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1594 while (h->root.type == bfd_link_hash_indirect
1595 || h->root.type == bfd_link_hash_warning)
1596 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1597 }
cbe950e9 1598
d5597ebc 1599 eh = (struct elf_i386_link_hash_entry *) h;
c25bc9fc
L		 1600 if (h != NULL)
1601 {
cbe950e9
L		 1602 /* Create the ifunc sections for static executables. If we
1603 never see an indirect function symbol nor we are building
1604 a static executable, those sections will be empty and
1605 won't appear in output. */
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;
1620 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
c2e61a4e 1621 return FALSE;
cbe950e9
L		 1622 break;
1623 }
1624
ad1e85de
L		 1625 /* It is referenced by a non-shared object. */
1626 h->ref_regular = 1;
61315175 1627 h->root.non_ir_ref = 1;
13a2df29
L		 1628
1629 if (h->type == STT_GNU_IFUNC)
1630 elf_tdata (info->output_bfd)->has_gnu_symbols
1631 |= elf_gnu_symbol_ifunc;
71cb9464 1632 }
252b5132 1633
142411ca
L		 1634 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1635 symtab_hdr, sym_hashes,
1636 &r_type, GOT_UNKNOWN,
23209a78 1637 rel, rel_end, h, r_symndx))
c2e61a4e 1638 return FALSE;
13ae64f3
JJ		 1639
1640 switch (r_type)
252b5132 1641 {
37e55690
JJ		 1642 case R_386_TLS_LDM:
1643 htab->tls_ldm_got.refcount += 1;
1644 goto create_got;
1645
1646 case R_386_PLT32:
1647 /* This symbol requires a procedure linkage table entry. We
1648 actually build the entry in adjust_dynamic_symbol,
1649 because this might be a case of linking PIC code which is
1650 never referenced by a dynamic object, in which case we
1651 don't need to generate a procedure linkage table entry
1652 after all. */
1653
1654 /* If this is a local symbol, we resolve it directly without
1655 creating a procedure linkage table entry. */
1656 if (h == NULL)
1657 continue;
1658
aec6b87e 1659 eh->has_got_reloc = 1;
f5385ebf 1660 h->needs_plt = 1;
37e55690
JJ		 1661 h->plt.refcount += 1;
1662 break;
1663
6a3e1bae 1664 case R_386_SIZE32:
06a6a421 1665 size_reloc = TRUE;
6a3e1bae
L		 1666 goto do_size;
1667
13ae64f3 1668 case R_386_TLS_IE_32:
37e55690
JJ		 1669 case R_386_TLS_IE:
1670 case R_386_TLS_GOTIE:
0e1862bb 1671 if (!bfd_link_executable (info))
13ae64f3 1672 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1673 /* Fall through */
1674
252b5132 1675 case R_386_GOT32:
02a86693 1676 case R_386_GOT32X:
13ae64f3 1677 case R_386_TLS_GD:
67a4f2b7
AO		 1678 case R_386_TLS_GOTDESC:
1679 case R_386_TLS_DESC_CALL:
252b5132 1680 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1681 {
1682 int tls_type, old_tls_type;
1683
1684 switch (r_type)
1685 {
1686 default:
02a86693
L		 1687 case R_386_GOT32:
1688 case R_386_GOT32X:
1689 tls_type = GOT_NORMAL;
1690 break;
13ae64f3 1691 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1692 case R_386_TLS_GOTDESC:
1693 case R_386_TLS_DESC_CALL:
1694 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1695 case R_386_TLS_IE_32:
1696 if (ELF32_R_TYPE (rel->r_info) == r_type)
1697 tls_type = GOT_TLS_IE_NEG;
1698 else
ebcfb3c0
JJ		 1699 /* If this is a GD->IE transition, we may use either of
1700 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1701 tls_type = GOT_TLS_IE;
1702 break;
1703 case R_386_TLS_IE:
1704 case R_386_TLS_GOTIE:
1705 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1706 }
1707
1708 if (h != NULL)
1709 {
1710 h->got.refcount += 1;
1711 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1712 }
1713 else
1714 {
1715 bfd_signed_vma *local_got_refcounts;
1716
1717 /* This is a global offset table entry for a local symbol. */
1718 local_got_refcounts = elf_local_got_refcounts (abfd);
1719 if (local_got_refcounts == NULL)
1720 {
1721 bfd_size_type size;
1722
1723 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1724 size *= (sizeof (bfd_signed_vma)
1725 + sizeof (bfd_vma) + sizeof(char));
a50b1753
NC		 1726 local_got_refcounts = (bfd_signed_vma *)
1727 bfd_zalloc (abfd, size);
13ae64f3 1728 if (local_got_refcounts == NULL)
c2e61a4e 1729 return FALSE;
13ae64f3 1730 elf_local_got_refcounts (abfd) = local_got_refcounts;
67a4f2b7
AO		 1731 elf_i386_local_tlsdesc_gotent (abfd)
1732 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
13ae64f3 1733 elf_i386_local_got_tls_type (abfd)
67a4f2b7 1734 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3
JJ		 1735 }
1736 local_got_refcounts[r_symndx] += 1;
1737 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1738 }
1739
37e55690
JJ		 1740 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1741 tls_type |= old_tls_type;
13ae64f3
JJ		 1742 /* If a TLS symbol is accessed using IE at least once,
1743 there is no point to use dynamic model for it. */
ebcfb3c0 1744 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1745 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1746 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1747 {
67a4f2b7 1748 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1749 tls_type = old_tls_type;
67a4f2b7
AO		 1750 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1751 && GOT_TLS_GD_ANY_P (tls_type))
1752 tls_type |= old_tls_type;
13ae64f3
JJ		 1753 else
1754 {
09a24cbf 1755 if (h)
4c544807
L		 1756 name = h->root.root.string;
1757 else
1758 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1759 NULL);
13ae64f3 1760 (*_bfd_error_handler)
d003868e 1761 (_("%B: `%s' accessed both as normal and "
55fd94b0 1762 "thread local symbol"),
4c544807 1763 abfd, name);
68c4a57e 1764 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1765 return FALSE;
13ae64f3
JJ		 1766 }
1767 }
1768
1769 if (old_tls_type != tls_type)
1770 {
1771 if (h != NULL)
1772 elf_i386_hash_entry (h)->tls_type = tls_type;
1773 else
1774 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1775 }
1776 }
0ac8d2ca
AM		 1777 /* Fall through */
1778
1779 case R_386_GOTOFF:
1780 case R_386_GOTPC:
13ae64f3 1781 create_got:
6de2ae4a 1782 if (htab->elf.sgot == NULL)
0ac8d2ca
AM		 1783 {
1784 if (htab->elf.dynobj == NULL)
1785 htab->elf.dynobj = abfd;
6de2ae4a 1786 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
c2e61a4e 1787 return FALSE;
0ac8d2ca 1788 }
37e55690 1789 if (r_type != R_386_TLS_IE)
aec6b87e
L		 1790 {
1791 if (eh != NULL)
1792 eh->has_got_reloc = 1;
1793 break;
1794 }
37e55690 1795 /* Fall through */
252b5132 1796
37e55690
JJ		 1797 case R_386_TLS_LE_32:
1798 case R_386_TLS_LE:
aec6b87e
L		 1799 if (eh != NULL)
1800 eh->has_got_reloc = 1;
0e1862bb 1801 if (bfd_link_executable (info))
37e55690 1802 break;
bffbf940 1803 info->flags |= DF_STATIC_TLS;
aec6b87e 1804 goto do_relocation;
252b5132
RH		 1805
1806 case R_386_32:
1807 case R_386_PC32:
aec6b87e
L		 1808 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1809 eh->has_non_got_reloc = 1;
1810do_relocation:
0e1862bb 1811 if (h != NULL && bfd_link_executable (info))
6725bdbf 1812 {
12d0ee4a 1813 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1814 need a copy reloc. We can't check reliably at this
1815 stage whether the section is read-only, as input
1816 sections have not yet been mapped to output sections.
1817 Tentatively set the flag for now, and correct in
1818 adjust_dynamic_symbol. */
f5385ebf 1819 h->non_got_ref = 1;
12d0ee4a
AM		 1820
1821 /* We may need a .plt entry if the function this reloc
1822 refers to is in a shared lib. */
51b64d56 1823 h->plt.refcount += 1;
4b627c18
L		 1824 if (r_type == R_386_PC32)
1825 {
1826 /* Since something like ".long foo - ." may be used
1827 as pointer, make sure that PLT is used if foo is
1828 a function defined in a shared library. */
1829 if ((sec->flags & SEC_CODE) == 0)
1830 h->pointer_equality_needed = 1;
1831 }
1832 else
04ebc307
L		 1833 {
1834 h->pointer_equality_needed = 1;
1835 /* R_386_32 can be resolved at run-time. */
1836 if (r_type == R_386_32
1837 && (sec->flags & SEC_READONLY) == 0)
1838 eh->func_pointer_refcount += 1;
1839 }
6725bdbf 1840 }
7843f00e 1841
06a6a421 1842 size_reloc = FALSE;
6a3e1bae 1843do_size:
252b5132 1844 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1845 against a global symbol, or a non PC relative reloc
1846 against a local symbol, then we need to copy the reloc
1847 into the shared library. However, if we are linking with
1848 -Bsymbolic, we do not need to copy a reloc against a
1849 global symbol which is defined in an object we are
1850 including in the link (i.e., DEF_REGULAR is set). At
1851 this point we have not seen all the input files, so it is
1852 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1853 later (it is never cleared). In case of a weak definition,
1854 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1855 a shared library. We account for that possibility below by
1f655a09
L		 1856 storing information in the relocs_copied field of the hash
1857 table entry. A similar situation occurs when creating
1858 shared libraries and symbol visibility changes render the
12d0ee4a 1859 symbol local.
56882138 1860
12d0ee4a
AM		 1861 If on the other hand, we are creating an executable, we
1862 may need to keep relocations for symbols satisfied by a
1863 dynamic library if we manage to avoid copy relocs for the
1864 symbol. */
0e1862bb 1865 if ((bfd_link_pic (info)
12d0ee4a 1866 && (sec->flags & SEC_ALLOC) != 0
13ae64f3 1867 && (r_type != R_386_PC32
12d0ee4a 1868 || (h != NULL
55255dae 1869 && (! SYMBOLIC_BIND (info, h)
12d0ee4a 1870 || h->root.type == bfd_link_hash_defweak
f5385ebf 1871 || !h->def_regular))))
a23b6845 1872 || (ELIMINATE_COPY_RELOCS
0e1862bb 1873 && !bfd_link_pic (info)
12d0ee4a
AM		 1874 && (sec->flags & SEC_ALLOC) != 0
1875 && h != NULL
12d0ee4a 1876 && (h->root.type == bfd_link_hash_defweak
0f88be7a 1877 || !h->def_regular)))
252b5132 1878 {
e03a8ed8
L		 1879 struct elf_dyn_relocs *p;
1880 struct elf_dyn_relocs **head;
ec338859 1881
12d0ee4a
AM		 1882 /* We must copy these reloc types into the output file.
1883 Create a reloc section in dynobj and make room for
1884 this reloc. */
252b5132
RH		 1885 if (sreloc == NULL)
1886 {
0ac8d2ca
AM		 1887 if (htab->elf.dynobj == NULL)
1888 htab->elf.dynobj = abfd;
1889
83bac4b0
NC		 1890 sreloc = _bfd_elf_make_dynamic_reloc_section
1891 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1892
252b5132 1893 if (sreloc == NULL)
c2e61a4e 1894 return FALSE;
252b5132
RH		 1895 }
1896
0c715baa
AM		 1897 /* If this is a global symbol, we count the number of
1898 relocations we need for this symbol. */
1899 if (h != NULL)
252b5132 1900 {
d5597ebc 1901 head = &eh->dyn_relocs;
0c715baa
AM		 1902 }
1903 else
1904 {
ec338859
AM		 1905 /* Track dynamic relocs needed for local syms too.
1906 We really need local syms available to do this
1907 easily. Oh well. */
87d72d41 1908 void **vpp;
ec338859 1909 asection *s;
87d72d41
AM		 1910
1911 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1912 abfd, r_symndx);
1913 if (isym == NULL)
1914 return FALSE;
1915
1916 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1917 if (s == NULL)
87d72d41 1918 s = sec;
ec338859 1919
e81d3500 1920 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1921 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 1922 }
1923
1924 p = *head;
1925 if (p == NULL || p->sec != sec)
1926 {
1927 bfd_size_type amt = sizeof *p;
a50b1753
NC		 1928 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1929 amt);
ec338859 1930 if (p == NULL)
c2e61a4e 1931 return FALSE;
ec338859
AM		 1932 p->next = *head;
1933 *head = p;
1934 p->sec = sec;
1935 p->count = 0;
1936 p->pc_count = 0;
252b5132 1937 }
ec338859
AM		 1938
1939 p->count += 1;
06a6a421
L		 1940 /* Count size relocation as PC-relative relocation. */
1941 if (r_type == R_386_PC32 || size_reloc)
ec338859 1942 p->pc_count += 1;
252b5132 1943 }
252b5132
RH		 1944 break;
1945
1946 /* This relocation describes the C++ object vtable hierarchy.
1947 Reconstruct it for later use during GC. */
1948 case R_386_GNU_VTINHERIT:
d17e0c6e 1949 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 1950 return FALSE;
252b5132
RH		 1951 break;
1952
1953 /* This relocation describes which C++ vtable entries are actually
1954 used. Record for later use during GC. */
1955 case R_386_GNU_VTENTRY:
c6aa130f
MS		 1956 BFD_ASSERT (h != NULL);
1957 if (h != NULL
1958 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c2e61a4e 1959 return FALSE;
252b5132
RH		 1960 break;
1961
1962 default:
1963 break;
1964 }
dd7e64d4
L		 1965
1966 if (use_plt_got
1967 && h != NULL
1968 && h->plt.refcount > 0
8ded2ddc
L		 1969 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
1970 || h->got.refcount > 0)
dd7e64d4
L		 1971 && htab->plt_got == NULL)
1972 {
1973 /* Create the GOT procedure linkage table. */
1974 unsigned int plt_got_align;
1975 const struct elf_backend_data *bed;
1976
1977 bed = get_elf_backend_data (info->output_bfd);
1978 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1979 && (sizeof (elf_i386_got_plt_entry)
1980 == sizeof (elf_i386_pic_got_plt_entry)));
1981 plt_got_align = 3;
1982
1983 if (htab->elf.dynobj == NULL)
1984 htab->elf.dynobj = abfd;
1985 htab->plt_got
1986 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1987 ".plt.got",
1988 (bed->dynamic_sec_flags
1989 | SEC_ALLOC
1990 | SEC_CODE
1991 | SEC_LOAD
1992 | SEC_READONLY));
1993 if (htab->plt_got == NULL
1994 || !bfd_set_section_alignment (htab->elf.dynobj,
1995 htab->plt_got,
1996 plt_got_align))
1997 return FALSE;
1998 }
c1d11331 1999
02a86693 2000 if ((r_type == R_386_GOT32 || r_type == R_386_GOT32X)
c1d11331 2001 && (h == NULL || h->type != STT_GNU_IFUNC))
02a86693 2002 sec->need_convert_load = 1;
252b5132
RH		 2003 }
2004
b34976b6 2005 return TRUE;
252b5132
RH		 2006}
2007
2008/* Return the section that should be marked against GC for a given
2009 relocation. */
2010
2011static asection *
55fd94b0 2012elf_i386_gc_mark_hook (asection *sec,
07adf181 2013 struct bfd_link_info *info,
55fd94b0
AM		 2014 Elf_Internal_Rela *rel,
2015 struct elf_link_hash_entry *h,
2016 Elf_Internal_Sym *sym)
252b5132
RH		 2017{
2018 if (h != NULL)
07adf181
AM		 2019 switch (ELF32_R_TYPE (rel->r_info))
2020 {
2021 case R_386_GNU_VTINHERIT:
2022 case R_386_GNU_VTENTRY:
2023 return NULL;
2024 }
2025
2026 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132
RH		 2027}
2028
2029/* Update the got entry reference counts for the section being removed. */
2030
b34976b6 2031static bfd_boolean
55fd94b0
AM		 2032elf_i386_gc_sweep_hook (bfd *abfd,
2033 struct bfd_link_info *info,
2034 asection *sec,
2035 const Elf_Internal_Rela *relocs)
252b5132 2036{
4dfe6ac6 2037 struct elf_i386_link_hash_table *htab;
dd5724d5
AM		 2038 Elf_Internal_Shdr *symtab_hdr;
2039 struct elf_link_hash_entry **sym_hashes;
2040 bfd_signed_vma *local_got_refcounts;
2041 const Elf_Internal_Rela *rel, *relend;
dd5724d5 2042
0e1862bb 2043 if (bfd_link_relocatable (info))
7dda2462
TG		 2044 return TRUE;
2045
4dfe6ac6
NC		 2046 htab = elf_i386_hash_table (info);
2047 if (htab == NULL)
2048 return FALSE;
2049
ec338859 2050 elf_section_data (sec)->local_dynrel = NULL;
dd5724d5 2051
0ffa91dd 2052 symtab_hdr = &elf_symtab_hdr (abfd);
6725bdbf
AM		 2053 sym_hashes = elf_sym_hashes (abfd);
2054 local_got_refcounts = elf_local_got_refcounts (abfd);
dd5724d5
AM		 2055
2056 relend = relocs + sec->reloc_count;
2057 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 2058 {
2059 unsigned long r_symndx;
2060 unsigned int r_type;
2061 struct elf_link_hash_entry *h = NULL;
37e55690 2062
26e41594
AM		 2063 r_symndx = ELF32_R_SYM (rel->r_info);
2064 if (r_symndx >= symtab_hdr->sh_info)
2065 {
26e41594 2066 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 2067 while (h->root.type == bfd_link_hash_indirect
2068 || h->root.type == bfd_link_hash_warning)
2069 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 2070 }
bb1cb422
L		 2071 else
2072 {
2073 /* A local symbol. */
2074 Elf_Internal_Sym *isym;
2075
2076 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2077 abfd, r_symndx);
2078
2079 /* Check relocation against local STT_GNU_IFUNC symbol. */
2080 if (isym != NULL
2081 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2082 {
2083 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
2084 if (h == NULL)
2085 abort ();
2086 }
2087 }
0c715baa 2088
3db2e7dd
L		 2089 if (h)
2090 {
2091 struct elf_i386_link_hash_entry *eh;
2092 struct elf_dyn_relocs **pp;
2093 struct elf_dyn_relocs *p;
2094
2095 eh = (struct elf_i386_link_hash_entry *) h;
2096 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2097 if (p->sec == sec)
2098 {
2099 /* Everything must go for SEC. */
2100 *pp = p->next;
2101 break;
2102 }
2103 }
2104
26e41594 2105 r_type = ELF32_R_TYPE (rel->r_info);
142411ca
L		 2106 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
2107 symtab_hdr, sym_hashes,
2108 &r_type, GOT_UNKNOWN,
23209a78 2109 rel, relend, h, r_symndx))
142411ca
L		 2110 return FALSE;
2111
26e41594
AM		 2112 switch (r_type)
2113 {
2114 case R_386_TLS_LDM:
4dfe6ac6
NC		 2115 if (htab->tls_ldm_got.refcount > 0)
2116 htab->tls_ldm_got.refcount -= 1;
26e41594 2117 break;
0c715baa 2118
26e41594 2119 case R_386_TLS_GD:
67a4f2b7
AO		 2120 case R_386_TLS_GOTDESC:
2121 case R_386_TLS_DESC_CALL:
26e41594
AM		 2122 case R_386_TLS_IE_32:
2123 case R_386_TLS_IE:
2124 case R_386_TLS_GOTIE:
2125 case R_386_GOT32:
02a86693 2126 case R_386_GOT32X:
26e41594
AM		 2127 if (h != NULL)
2128 {
2129 if (h->got.refcount > 0)
2130 h->got.refcount -= 1;
bb1cb422
L		 2131 if (h->type == STT_GNU_IFUNC)
2132 {
2133 if (h->plt.refcount > 0)
2134 h->plt.refcount -= 1;
2135 }
26e41594
AM		 2136 }
2137 else if (local_got_refcounts != NULL)
2138 {
2139 if (local_got_refcounts[r_symndx] > 0)
2140 local_got_refcounts[r_symndx] -= 1;
2141 }
2142 break;
0c715baa 2143
26e41594
AM		 2144 case R_386_32:
2145 case R_386_PC32:
1788fc08 2146 case R_386_SIZE32:
0e1862bb 2147 if (bfd_link_pic (info)
3db2e7dd 2148 && (h == NULL || h->type != STT_GNU_IFUNC))
26e41594
AM		 2149 break;
2150 /* Fall through */
6725bdbf 2151
26e41594
AM		 2152 case R_386_PLT32:
2153 if (h != NULL)
2154 {
2155 if (h->plt.refcount > 0)
2156 h->plt.refcount -= 1;
04ebc307
L		 2157 if (r_type == R_386_32
2158 && (sec->flags & SEC_READONLY) == 0)
2159 {
2160 struct elf_i386_link_hash_entry *eh
2161 = (struct elf_i386_link_hash_entry *) h;
2162 if (eh->func_pointer_refcount > 0)
2163 eh->func_pointer_refcount -= 1;
2164 }
26e41594
AM		 2165 }
2166 break;
dd5724d5 2167
bb1cb422
L		 2168 case R_386_GOTOFF:
2169 if (h != NULL && h->type == STT_GNU_IFUNC)
2170 {
2171 if (h->got.refcount > 0)
2172 h->got.refcount -= 1;
2173 if (h->plt.refcount > 0)
2174 h->plt.refcount -= 1;
2175 }
2176 break;
2177
26e41594
AM		 2178 default:
2179 break;
2180 }
2181 }
252b5132 2182
b34976b6 2183 return TRUE;
252b5132
RH		 2184}
2185
aec6b87e
L		 2186/* Remove undefined weak symbol from the dynamic symbol table if it
2187 is resolved to 0. */
2188
2189static bfd_boolean
2190elf_i386_fixup_symbol (struct bfd_link_info *info,
2191 struct elf_link_hash_entry *h)
2192{
2193 if (h->dynindx != -1
2194 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2195 elf_i386_hash_entry (h)))
2196 {
2197 h->dynindx = -1;
2198 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2199 h->dynstr_index);
2200 }
2201 return TRUE;
2202}
2203
252b5132
RH		 2204/* Adjust a symbol defined by a dynamic object and referenced by a
2205 regular object. The current definition is in some section of the
2206 dynamic object, but we're not including those sections. We have to
2207 change the definition to something the rest of the link can
2208 understand. */
2209
b34976b6 2210static bfd_boolean
55fd94b0
AM		 2211elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2212 struct elf_link_hash_entry *h)
252b5132 2213{
6725bdbf 2214 struct elf_i386_link_hash_table *htab;
252b5132 2215 asection *s;
5ca5bb35
L		 2216 struct elf_i386_link_hash_entry *eh;
2217 struct elf_dyn_relocs *p;
252b5132 2218
cbe950e9
L		 2219 /* STT_GNU_IFUNC symbol must go through PLT. */
2220 if (h->type == STT_GNU_IFUNC)
2221 {
73bcf233
L		 2222 /* All local STT_GNU_IFUNC references must be treate as local
2223 calls via local PLT. */
5ca5bb35
L		 2224 if (h->ref_regular
2225 && SYMBOL_CALLS_LOCAL (info, h))
2226 {
73bcf233 2227 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L		 2228 struct elf_dyn_relocs **pp;
2229
2230 eh = (struct elf_i386_link_hash_entry *) h;
2231 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2232 {
2233 pc_count += p->pc_count;
2234 p->count -= p->pc_count;
2235 p->pc_count = 0;
73bcf233 2236 count += p->count;
5ca5bb35
L		 2237 if (p->count == 0)
2238 *pp = p->next;
2239 else
2240 pp = &p->next;
2241 }
2242
73bcf233 2243 if (pc_count || count)
5ca5bb35
L		 2244 {
2245 h->needs_plt = 1;
5ca5bb35 2246 h->non_got_ref = 1;
a5479e5f
L		 2247 if (h->plt.refcount <= 0)
2248 h->plt.refcount = 1;
2249 else
2250 h->plt.refcount += 1;
5ca5bb35
L		 2251 }
2252 }
2253
cbe950e9
L		 2254 if (h->plt.refcount <= 0)
2255 {
2256 h->plt.offset = (bfd_vma) -1;
2257 h->needs_plt = 0;
2258 }
2259 return TRUE;
2260 }
2261
252b5132
RH		 2262 /* If this is a function, put it in the procedure linkage table. We
2263 will fill in the contents of the procedure linkage table later,
2264 when we know the address of the .got section. */
2265 if (h->type == STT_FUNC
f5385ebf 2266 || h->needs_plt)
252b5132 2267 {
6725bdbf 2268 if (h->plt.refcount <= 0
9c7a29a3
AM		 2269 || SYMBOL_CALLS_LOCAL (info, h)
2270 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2271 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2272 {
2273 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM		 2274 file, but the symbol was never referred to by a dynamic
2275 object, or if all references were garbage collected. In
2276 such a case, we don't actually need to build a procedure
2277 linkage table, and we can just do a PC32 reloc instead. */
bbd7ec4a 2278 h->plt.offset = (bfd_vma) -1;
f5385ebf 2279 h->needs_plt = 0;
252b5132
RH		 2280 }
2281
b34976b6 2282 return TRUE;
252b5132 2283 }
6725bdbf
AM		 2284 else
2285 /* It's possible that we incorrectly decided a .plt reloc was
2286 needed for an R_386_PC32 reloc to a non-function sym in
2287 check_relocs. We can't decide accurately between function and
2288 non-function syms in check-relocs; Objects loaded later in
2289 the link may change h->type. So fix it now. */
bbd7ec4a 2290 h->plt.offset = (bfd_vma) -1;
252b5132
RH		 2291
2292 /* If this is a weak symbol, and there is a real definition, the
2293 processor independent code will have arranged for us to see the
2294 real definition first, and we can just use the same value. */
f6e332e6 2295 if (h->u.weakdef != NULL)
252b5132 2296 {
f6e332e6
AM		 2297 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2298 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2299 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2300 h->root.u.def.value = h->u.weakdef->root.u.def.value;
a23b6845 2301 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 2302 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 2303 return TRUE;
252b5132
RH		 2304 }
2305
2306 /* This is a reference to a symbol defined by a dynamic object which
2307 is not a function. */
2308
2309 /* If we are creating a shared library, we must presume that the
2310 only references to the symbol are via the global offset table.
2311 For such cases we need not do anything here; the relocations will
2312 be handled correctly by relocate_section. */
0e1862bb 2313 if (!bfd_link_executable (info))
b34976b6 2314 return TRUE;
252b5132 2315
7843f00e 2316 /* If there are no references to this symbol that do not use the
d5597ebc
L		 2317 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2318 reloc. */
2319 eh = (struct elf_i386_link_hash_entry *) h;
2320 if (!h->non_got_ref && !eh->gotoff_ref)
b34976b6 2321 return TRUE;
7843f00e 2322
8bd621d8
AM		 2323 /* If -z nocopyreloc was given, we won't generate them either. */
2324 if (info->nocopyreloc)
2325 {
f5385ebf 2326 h->non_got_ref = 0;
b34976b6 2327 return TRUE;
8bd621d8
AM		 2328 }
2329
643796e3 2330 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 2331 if (htab == NULL)
2332 return FALSE;
643796e3 2333
d5597ebc
L		 2334 /* If there aren't any dynamic relocs in read-only sections nor
2335 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2336 avoid the copy reloc. This doesn't work on VxWorks, where we can
2337 not have dynamic relocations (other than copy and jump slot
2338 relocations) in an executable. */
23209a78 2339 if (ELIMINATE_COPY_RELOCS
d5597ebc 2340 && !eh->gotoff_ref
23209a78 2341 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
ebe50bae 2342 {
a23b6845
AM		 2343 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2344 {
2345 s = p->sec->output_section;
2346 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2347 break;
2348 }
2349
a23b6845
AM		 2350 if (p == NULL)
2351 {
f5385ebf 2352 h->non_got_ref = 0;
a23b6845
AM		 2353 return TRUE;
2354 }
ebe50bae
AM		 2355 }
2356
252b5132
RH		 2357 /* We must allocate the symbol in our .dynbss section, which will
2358 become part of the .bss section of the executable. There will be
2359 an entry for this symbol in the .dynsym section. The dynamic
2360 object will contain position independent code, so all references
2361 from the dynamic object to this symbol will go through the global
2362 offset table. The dynamic linker will use the .dynsym entry to
2363 determine the address it must put in the global offset table, so
2364 both the dynamic object and the regular object will refer to the
2365 same memory location for the variable. */
2366
252b5132
RH		 2367 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2368 copy the initial value out of the dynamic object and into the
0ac8d2ca 2369 runtime process image. */
1d7e9d18 2370 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
252b5132 2371 {
eea6121a 2372 htab->srelbss->size += sizeof (Elf32_External_Rel);
f5385ebf 2373 h->needs_copy = 1;
252b5132
RH		 2374 }
2375
0ac8d2ca 2376 s = htab->sdynbss;
252b5132 2377
6cabe1ea 2378 return _bfd_elf_adjust_dynamic_copy (info, h, s);
252b5132
RH		 2379}
2380
6725bdbf 2381/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 2382 dynamic relocs. */
6725bdbf 2383
b34976b6 2384static bfd_boolean
eb4ff4d6 2385elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 2386{
2387 struct bfd_link_info *info;
2388 struct elf_i386_link_hash_table *htab;
5a15f56f 2389 struct elf_i386_link_hash_entry *eh;
e03a8ed8 2390 struct elf_dyn_relocs *p;
25e762b9 2391 unsigned plt_entry_size;
aec6b87e 2392 bfd_boolean resolved_to_zero;
6725bdbf 2393
e92d460e 2394 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2395 return TRUE;
6725bdbf 2396
cbe950e9 2397 eh = (struct elf_i386_link_hash_entry *) h;
e92d460e 2398
6725bdbf
AM		 2399 info = (struct bfd_link_info *) inf;
2400 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 2401 if (htab == NULL)
2402 return FALSE;
6725bdbf 2403
25e762b9
RM		 2404 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2405
aec6b87e
L		 2406 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
2407
04ebc307
L		 2408 /* Clear the reference count of function pointer relocations if
2409 symbol isn't a normal function. */
2410 if (h->type != STT_FUNC)
2411 eh->func_pointer_refcount = 0;
2412
dd7e64d4
L		 2413 /* We can't use the GOT PLT if pointer equality is needed since
2414 finish_dynamic_symbol won't clear symbol value and the dynamic
2415 linker won't update the GOT slot. We will get into an infinite
2416 loop at run-time. */
2417 if (htab->plt_got != NULL
2418 && h->type != STT_GNU_IFUNC
2419 && !h->pointer_equality_needed
2420 && h->plt.refcount > 0
2421 && h->got.refcount > 0)
2422 {
2423 /* Don't use the regular PLT if there are both GOT and GOTPLT
2424 reloctions. */
2425 h->plt.offset = (bfd_vma) -1;
2426
2427 /* Use the GOT PLT. */
2428 eh->plt_got.refcount = 1;
2429 }
2430
cbe950e9
L		 2431 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2432 here if it is defined and referenced in a non-shared object. */
2433 if (h->type == STT_GNU_IFUNC
2434 && h->def_regular)
25e762b9 2435 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
7b70956d
WN		 2436 plt_entry_size,
2437 plt_entry_size, 4);
04ebc307
L		 2438 /* Don't create the PLT entry if there are only function pointer
2439 relocations which can be resolved at run-time. */
cbe950e9 2440 else if (htab->elf.dynamic_sections_created
04ebc307
L		 2441 && (h->plt.refcount > eh->func_pointer_refcount
2442 || eh->plt_got.refcount > 0))
6725bdbf 2443 {
25070364
L		 2444 bfd_boolean use_plt_got;
2445
04ebc307
L		 2446 /* Clear the reference count of function pointer relocations
2447 if PLT is used. */
2448 eh->func_pointer_refcount = 0;
2449
8ded2ddc 2450 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
25070364
L		 2451 {
2452 /* Don't use the regular PLT for DF_BIND_NOW. */
2453 h->plt.offset = (bfd_vma) -1;
2454
2455 /* Use the GOT PLT. */
2456 h->got.refcount = 1;
2457 eh->plt_got.refcount = 1;
2458 }
2459
2460 use_plt_got = eh->plt_got.refcount > 0;
dd7e64d4 2461
5a15f56f
AM		 2462 /* Make sure this symbol is output as a dynamic symbol.
2463 Undefined weak syms won't yet be marked as dynamic. */
2464 if (h->dynindx == -1
aec6b87e
L		 2465 && !h->forced_local
2466 && !resolved_to_zero)
5a15f56f 2467 {
c152c796 2468 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2469 return FALSE;
5a15f56f
AM		 2470 }
2471
0e1862bb 2472 if (bfd_link_pic (info)
4e795f50 2473 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 2474 {
6de2ae4a 2475 asection *s = htab->elf.splt;
dd7e64d4 2476 asection *got_s = htab->plt_got;
6725bdbf 2477
7c1e8d3e
L		 2478 /* If this is the first .plt entry, make room for the special
2479 first entry. The .plt section is used by prelink to undo
2480 prelinking for dynamic relocations. */
2481 if (s->size == 0)
2482 s->size = plt_entry_size;
2483
dd7e64d4
L		 2484 if (use_plt_got)
2485 eh->plt_got.offset = got_s->size;
2486 else
7c1e8d3e 2487 h->plt.offset = s->size;
6725bdbf 2488
ced53ee5
AM		 2489 /* If this symbol is not defined in a regular file, and we are
2490 not generating a shared library, then set the symbol to this
2491 location in the .plt. This is required to make function
2492 pointers compare as equal between the normal executable and
2493 the shared library. */
0e1862bb 2494 if (! bfd_link_pic (info)
f5385ebf 2495 && !h->def_regular)
ced53ee5 2496 {
dd7e64d4
L		 2497 if (use_plt_got)
2498 {
2499 /* We need to make a call to the entry of the GOT PLT
2500 instead of regular PLT entry. */
2501 h->root.u.def.section = got_s;
2502 h->root.u.def.value = eh->plt_got.offset;
2503 }
2504 else
2505 {
2506 h->root.u.def.section = s;
2507 h->root.u.def.value = h->plt.offset;
2508 }
ced53ee5 2509 }
6725bdbf 2510
ced53ee5 2511 /* Make room for this entry. */
dd7e64d4
L		 2512 if (use_plt_got)
2513 got_s->size += sizeof (elf_i386_got_plt_entry);
2514 else
2515 {
2516 s->size += plt_entry_size;
6725bdbf 2517
dd7e64d4
L		 2518 /* We also need to make an entry in the .got.plt section,
2519 which will be placed in the .got section by the linker
2520 script. */
2521 htab->elf.sgotplt->size += 4;
6725bdbf 2522
aec6b87e
L		 2523 /* There should be no PLT relocation against resolved
2524 undefined weak symbol in executable. */
2525 if (!resolved_to_zero)
2526 {
2527 /* We also need to make an entry in the .rel.plt
2528 section. */
2529 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2530 htab->elf.srelplt->reloc_count++;
2531 }
dd7e64d4 2532 }
eac338cf 2533
23209a78 2534 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
0e1862bb 2535 && !bfd_link_pic (info))
eac338cf
PB		 2536 {
2537 /* VxWorks has a second set of relocations for each PLT entry
2538 in executables. They go in a separate relocation section,
2539 which is processed by the kernel loader. */
2540
2541 /* There are two relocations for the initial PLT entry: an
2542 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2543 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2544
25e762b9 2545 if (h->plt.offset == plt_entry_size)
eac338cf
PB		 2546 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2547
2548 /* There are two extra relocations for each subsequent PLT entry:
2549 an R_386_32 relocation for the GOT entry, and an R_386_32
2550 relocation for the PLT entry. */
2551
2552 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2553 }
6725bdbf 2554 }
ced53ee5
AM		 2555 else
2556 {
13f42277 2557 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2558 h->plt.offset = (bfd_vma) -1;
f5385ebf 2559 h->needs_plt = 0;
ced53ee5 2560 }
6725bdbf
AM		 2561 }
2562 else
2563 {
13f42277 2564 eh->plt_got.offset = (bfd_vma) -1;
51b64d56 2565 h->plt.offset = (bfd_vma) -1;
f5385ebf 2566 h->needs_plt = 0;
6725bdbf
AM		 2567 }
2568
67a4f2b7
AO		 2569 eh->tlsdesc_got = (bfd_vma) -1;
2570
37e55690 2571 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 2572 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2573 if (h->got.refcount > 0
0e1862bb 2574 && bfd_link_executable (info)
13ae64f3 2575 && h->dynindx == -1
37e55690 2576 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
cedb70c5 2577 h->got.offset = (bfd_vma) -1;
13ae64f3 2578 else if (h->got.refcount > 0)
6725bdbf 2579 {
0ac8d2ca 2580 asection *s;
b34976b6 2581 bfd_boolean dyn;
13ae64f3 2582 int tls_type = elf_i386_hash_entry(h)->tls_type;
6725bdbf 2583
5a15f56f
AM		 2584 /* Make sure this symbol is output as a dynamic symbol.
2585 Undefined weak syms won't yet be marked as dynamic. */
2586 if (h->dynindx == -1
aec6b87e
L		 2587 && !h->forced_local
2588 && !resolved_to_zero)
5a15f56f 2589 {
c152c796 2590 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2591 return FALSE;
5a15f56f
AM		 2592 }
2593
6de2ae4a 2594 s = htab->elf.sgot;
67a4f2b7
AO		 2595 if (GOT_TLS_GDESC_P (tls_type))
2596 {
6de2ae4a 2597 eh->tlsdesc_got = htab->elf.sgotplt->size
67a4f2b7 2598 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2599 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 2600 h->got.offset = (bfd_vma) -2;
2601 }
2602 if (! GOT_TLS_GDESC_P (tls_type)
2603 || GOT_TLS_GD_P (tls_type))
2604 {
2605 h->got.offset = s->size;
2606 s->size += 4;
2607 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2608 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2609 s->size += 4;
2610 }
ebe50bae 2611 dyn = htab->elf.dynamic_sections_created;
13ae64f3 2612 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 2613 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2614 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2615 need two), R_386_TLS_GD needs one if local symbol and two if
aec6b87e
L		 2616 global. No dynamic relocation against resolved undefined weak
2617 symbol in executable. */
37e55690 2618 if (tls_type == GOT_TLS_IE_BOTH)
6de2ae4a 2619 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2620 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
37e55690 2621 || (tls_type & GOT_TLS_IE))
6de2ae4a 2622 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2623 else if (GOT_TLS_GD_P (tls_type))
6de2ae4a 2624 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2625 else if (! GOT_TLS_GDESC_P (tls_type)
aec6b87e
L		 2626 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2627 && !resolved_to_zero)
67a4f2b7 2628 || h->root.type != bfd_link_hash_undefweak)
0e1862bb 2629 && (bfd_link_pic (info)
ef5aade5 2630 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6de2ae4a 2631 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2632 if (GOT_TLS_GDESC_P (tls_type))
6de2ae4a 2633 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 2634 }
2635 else
51b64d56 2636 h->got.offset = (bfd_vma) -1;
6725bdbf 2637
5a15f56f 2638 if (eh->dyn_relocs == NULL)
b34976b6 2639 return TRUE;
5a15f56f 2640
0c715baa
AM		 2641 /* In the shared -Bsymbolic case, discard space allocated for
2642 dynamic pc-relative relocs against symbols which turn out to be
2643 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 2644 space for pc-relative relocs that have become local due to symbol
2645 visibility changes. */
0c715baa 2646
0e1862bb 2647 if (bfd_link_pic (info))
5a15f56f 2648 {
09695f56
AM		 2649 /* The only reloc that uses pc_count is R_386_PC32, which will
2650 appear on a call or on something like ".long foo - .". We
2651 want calls to protected symbols to resolve directly to the
2652 function rather than going via the plt. If people want
2653 function pointer comparisons to work as expected then they
2654 should avoid writing assembly like ".long foo - .". */
2655 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 2656 {
e03a8ed8 2657 struct elf_dyn_relocs **pp;
0c715baa
AM		 2658
2659 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2660 {
c3ce498c
L		 2661 p->count -= p->pc_count;
2662 p->pc_count = 0;
0c715baa
AM		 2663 if (p->count == 0)
2664 *pp = p->next;
2665 else
2666 pp = &p->next;
2667 }
5a15f56f 2668 }
4e795f50 2669
23209a78 2670 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
3348747a 2671 {
e03a8ed8 2672 struct elf_dyn_relocs **pp;
3348747a
NS		 2673 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2674 {
2675 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2676 *pp = p->next;
2677 else
2678 pp = &p->next;
2679 }
2680 }
2681
4e795f50 2682 /* Also discard relocs on undefined weak syms with non-default
aec6b87e 2683 visibility or in PIE. */
22d606e9 2684 if (eh->dyn_relocs != NULL
c353e543 2685 && h->root.type == bfd_link_hash_undefweak)
22d606e9 2686 {
aec6b87e
L		 2687 /* Undefined weak symbol is never bound locally in shared
2688 library. */
2689 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2690 || resolved_to_zero)
2691 {
2692 if (h->non_got_ref)
2693 {
2694 /* Keep dynamic non-GOT/non-PLT relocation so that we
2695 can branch to 0 without PLT. */
2696 struct elf_dyn_relocs **pp;
2697
2698 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2699 if (p->pc_count == 0)
2700 *pp = p->next;
2701 else
2702 {
2703 /* Remove non-R_386_PC32 relocation. */
2704 p->count = p->pc_count;
2705 pp = &p->next;
2706 }
22d606e9 2707
aec6b87e
L		 2708 if (eh->dyn_relocs != NULL)
2709 {
2710 /* Make sure undefined weak symbols are output
2711 as dynamic symbols in PIEs for dynamic non-GOT
2712 non-PLT reloations. */
2713 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2714 return FALSE;
2715 }
2716 }
2717 else
2718 eh->dyn_relocs = NULL;
2719 }
22d606e9
AM		 2720 else if (h->dynindx == -1
2721 && !h->forced_local)
2722 {
2723 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2724 return FALSE;
2725 }
2726 }
0c715baa 2727 }
a23b6845 2728 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 2729 {
2730 /* For the non-shared case, discard space for relocs against
2731 symbols which turn out to need copy relocs or are not
04ebc307
L		 2732 dynamic. Keep dynamic relocations for run-time function
2733 pointer initialization. */
0c715baa 2734
aec6b87e
L		 2735 if ((!h->non_got_ref
2736 || eh->func_pointer_refcount > 0
2737 || (h->root.type == bfd_link_hash_undefweak
2738 && !resolved_to_zero))
f5385ebf
AM		 2739 && ((h->def_dynamic
2740 && !h->def_regular)
ebe50bae 2741 || (htab->elf.dynamic_sections_created
0c715baa
AM		 2742 && (h->root.type == bfd_link_hash_undefweak
2743 || h->root.type == bfd_link_hash_undefined))))
2744 {
2745 /* Make sure this symbol is output as a dynamic symbol.
2746 Undefined weak syms won't yet be marked as dynamic. */
2747 if (h->dynindx == -1
aec6b87e
L		 2748 && !h->forced_local
2749 && !resolved_to_zero)
0c715baa 2750 {
c152c796 2751 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2752 return FALSE;
0c715baa 2753 }
5a15f56f 2754
0c715baa
AM		 2755 /* If that succeeded, we know we'll be keeping all the
2756 relocs. */
2757 if (h->dynindx != -1)
2758 goto keep;
2759 }
2760
2761 eh->dyn_relocs = NULL;
04ebc307 2762 eh->func_pointer_refcount = 0;
0c715baa 2763
ec338859 2764 keep: ;
5a15f56f
AM		 2765 }
2766
0c715baa
AM		 2767 /* Finally, allocate space. */
2768 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 2769 {
e7c33416
NC		 2770 asection *sreloc;
2771
cbe950e9 2772 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2773
2774 BFD_ASSERT (sreloc != NULL);
eea6121a 2775 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 2776 }
2777
b34976b6 2778 return TRUE;
6725bdbf
AM		 2779}
2780
c25bc9fc
L		 2781/* Allocate space in .plt, .got and associated reloc sections for
2782 local dynamic relocs. */
2783
2784static bfd_boolean
2785elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2786{
2787 struct elf_link_hash_entry *h
2788 = (struct elf_link_hash_entry *) *slot;
2789
2790 if (h->type != STT_GNU_IFUNC
2791 || !h->def_regular
2792 || !h->ref_regular
2793 || !h->forced_local
2794 || h->root.type != bfd_link_hash_defined)
2795 abort ();
2796
2797 return elf_i386_allocate_dynrelocs (h, inf);
2798}
2799
0c715baa
AM		 2800/* Find any dynamic relocs that apply to read-only sections. */
2801
b34976b6 2802static bfd_boolean
eb4ff4d6 2803elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
0c715baa
AM		 2804{
2805 struct elf_i386_link_hash_entry *eh;
e03a8ed8 2806 struct elf_dyn_relocs *p;
0c715baa 2807
aa715242
L		 2808 /* Skip local IFUNC symbols. */
2809 if (h->forced_local && h->type == STT_GNU_IFUNC)
2810 return TRUE;
2811
0c715baa
AM		 2812 eh = (struct elf_i386_link_hash_entry *) h;
2813 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2814 {
2815 asection *s = p->sec->output_section;
2816
2817 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2818 {
2819 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2820
2821 info->flags |= DF_TEXTREL;
2822
0e1862bb 2823 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd
L		 2824 || info->error_textrel)
2825 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
b70321a2
L		 2826 p->sec->owner, h->root.root.string,
2827 p->sec);
2828
0c715baa 2829 /* Not an error, just cut short the traversal. */
b34976b6 2830 return FALSE;
0c715baa
AM		 2831 }
2832 }
b34976b6 2833 return TRUE;
0c715baa
AM		 2834}
2835
02a86693
L		 2836/* With the local symbol, foo, we convert
2837 mov foo@GOT[(%reg1)], %reg2
2838 to
2839 lea foo[@GOTOFF(%reg1)], %reg2
2840 and convert
2841 call/jmp *foo@GOT[(%reg)]
daa67607 2842 to
02a86693
L		 2843 nop call foo/jmp foo nop
2844 When PIC is false, convert
2845 test %reg1, foo@GOT[(%reg2)]
2846 to
2847 test $foo, %reg1
2848 and convert
2849 binop foo@GOT[(%reg1)], %reg2
2850 to
2851 binop $foo, %reg2
2852 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
2853 instructions. */
daa67607
L		 2854
2855static bfd_boolean
02a86693 2856elf_i386_convert_load (bfd *abfd, asection *sec,
a6af384b 2857 struct bfd_link_info *link_info)
daa67607
L		 2858{
2859 Elf_Internal_Shdr *symtab_hdr;
2860 Elf_Internal_Rela *internal_relocs;
2861 Elf_Internal_Rela *irel, *irelend;
2862 bfd_byte *contents;
2863 struct elf_i386_link_hash_table *htab;
2864 bfd_boolean changed_contents;
2865 bfd_boolean changed_relocs;
2866 bfd_signed_vma *local_got_refcounts;
2867
2868 /* Don't even try to convert non-ELF outputs. */
2869 if (!is_elf_hash_table (link_info->hash))
2870 return FALSE;
2871
c1d11331 2872 /* Nothing to do if there is no need or no output. */
daa67607 2873 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
02a86693 2874 || sec->need_convert_load == 0
c8831961 2875 || bfd_is_abs_section (sec->output_section))
daa67607
L		 2876 return TRUE;
2877
2878 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2879
2880 /* Load the relocations for this section. */
2881 internal_relocs = (_bfd_elf_link_read_relocs
2882 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2883 link_info->keep_memory));
2884 if (internal_relocs == NULL)
2885 return FALSE;
2886
2887 htab = elf_i386_hash_table (link_info);
2888 changed_contents = FALSE;
2889 changed_relocs = FALSE;
2890 local_got_refcounts = elf_local_got_refcounts (abfd);
2891
2892 /* Get the section contents. */
2893 if (elf_section_data (sec)->this_hdr.contents != NULL)
2894 contents = elf_section_data (sec)->this_hdr.contents;
2895 else
2896 {
2897 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2898 goto error_return;
2899 }
2900
2901 irelend = internal_relocs + sec->reloc_count;
2902 for (irel = internal_relocs; irel < irelend; irel++)
2903 {
2904 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2905 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2906 unsigned int indx;
2907 struct elf_link_hash_entry *h;
02a86693
L		 2908 unsigned int opcode;
2909 unsigned int modrm;
2910 bfd_vma roff;
2911 bfd_boolean baseless;
2912 Elf_Internal_Sym *isym;
2913 unsigned int addend;
2914 unsigned int nop;
2915 bfd_vma nop_offset;
daa67607 2916
02a86693 2917 if (r_type != R_386_GOT32 && r_type != R_386_GOT32X)
daa67607
L		 2918 continue;
2919
02a86693
L		 2920 roff = irel->r_offset;
2921 if (roff < 2)
2922 continue;
2923
02e2aef8
L		 2924 /* Addend for R_386_GOT32 and R_386_GOT32X relocations must be 0. */
2925 addend = bfd_get_32 (abfd, contents + roff);
2926 if (addend != 0)
2927 continue;
2928
02a86693
L		 2929 modrm = bfd_get_8 (abfd, contents + roff - 1);
2930 baseless = (modrm & 0xc7) == 0x5;
2931
2932 if (r_type == R_386_GOT32X
2933 && baseless
2934 && bfd_link_pic (link_info))
daa67607 2935 {
02a86693
L		 2936 /* For PIC, disallow R_386_GOT32X without a base register
2937 since we don't know what the GOT base is. Allow
2938 R_386_GOT32 for existing object files. */
2939 const char *name;
2940
2941 if (r_symndx < symtab_hdr->sh_info)
2942 {
2943 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
2944 r_symndx);
2945 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2946 }
2947 else
2948 {
2949 indx = r_symndx - symtab_hdr->sh_info;
2950 h = elf_sym_hashes (abfd)[indx];
2951 BFD_ASSERT (h != NULL);
2952 name = h->root.root.string;
2953 }
2954
2955 (*_bfd_error_handler)
2956 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"),
2957 abfd, name);
2958 goto error_return;
2959 }
daa67607 2960
02a86693
L		 2961 opcode = bfd_get_8 (abfd, contents + roff - 2);
2962
2963 /* It is OK to convert mov to lea. */
2964 if (opcode != 0x8b)
2965 {
2966 /* Only convert R_386_GOT32X relocation for call, jmp or
2967 one of adc, add, and, cmp, or, sbb, sub, test, xor
2968 instructions. */
2969 if (r_type != R_386_GOT32X)
2970 continue;
2971
2972 /* It is OK to convert indirect branch to direct branch. It
2973 is OK to convert adc, add, and, cmp, or, sbb, sub, test,
2974 xor only when PIC is false. */
2975 if (opcode != 0xff && bfd_link_pic (link_info))
2976 continue;
2977 }
2978
2979 /* Try to convert R_386_GOT32 and R_386_GOT32X. Get the symbol
2980 referred to by the reloc. */
2981 if (r_symndx < symtab_hdr->sh_info)
2982 {
daa67607
L		 2983 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2984 abfd, r_symndx);
2985
02a86693
L		 2986 /* STT_GNU_IFUNC must keep GOT32 relocations. */
2987 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2988 continue;
2989
2990 h = NULL;
2991 if (opcode == 0x0ff)
2992 /* Convert "call/jmp *foo@GOT[(%reg)]". */
2993 goto convert_branch;
2994 else
2995 /* Convert "mov foo@GOT[(%reg1)], %reg2",
2996 "test %reg1, foo@GOT(%reg2)" and
2997 "binop foo@GOT[(%reg1)], %reg2". */
2998 goto convert_load;
daa67607
L		 2999 }
3000
3001 indx = r_symndx - symtab_hdr->sh_info;
3002 h = elf_sym_hashes (abfd)[indx];
3003 BFD_ASSERT (h != NULL);
3004
3005 while (h->root.type == bfd_link_hash_indirect
3006 || h->root.type == bfd_link_hash_warning)
3007 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3008
02a86693
L		 3009 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3010 if (h->type == STT_GNU_IFUNC)
3011 continue;
3012
3013 if (opcode == 0xff)
3014 {
3015 /* We have "call/jmp *foo@GOT[(%reg)]". */
3016 if ((h->root.type == bfd_link_hash_defined
3017 || h->root.type == bfd_link_hash_defweak)
3018 && SYMBOL_REFERENCES_LOCAL (link_info, h))
3019 {
3020 /* The function is locally defined. */
3021convert_branch:
02a86693
L		 3022 /* Convert R_386_GOT32X to R_386_PC32. */
3023 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
3024 {
3025 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
3026 is a nop prefix. */
3027 modrm = 0xe8;
caa65211
L		 3028 nop = link_info->call_nop_byte;
3029 if (link_info->call_nop_as_suffix)
3030 {
3031 nop_offset = roff + 3;
3032 irel->r_offset -= 1;
3033 }
3034 else
3035 nop_offset = roff - 2;
02a86693
L		 3036 }
3037 else
3038 {
3039 /* Convert to "jmp foo nop". */
3040 modrm = 0xe9;
3041 nop = NOP_OPCODE;
3042 nop_offset = roff + 3;
3043 irel->r_offset -= 1;
3044 }
3045
3046 bfd_put_8 (abfd, nop, contents + nop_offset);
3047 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
3048 /* When converting to PC-relative relocation, we
3049 need to adjust addend by -4. */
3050 bfd_put_32 (abfd, -4, contents + irel->r_offset);
3051 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
3052
3053 if (h)
3054 {
3055 if (h->got.refcount > 0)
3056 h->got.refcount -= 1;
3057 }
3058 else
3059 {
3060 if (local_got_refcounts != NULL
3061 && local_got_refcounts[r_symndx] > 0)
3062 local_got_refcounts[r_symndx] -= 1;
3063 }
3064
3065 changed_contents = TRUE;
3066 changed_relocs = TRUE;
3067 }
3068 }
3069 else
daa67607 3070 {
02a86693
L		 3071 /* We have "mov foo@GOT[(%re1g)], %reg2",
3072 "test %reg1, foo@GOT(%reg2)" and
3073 "binop foo@GOT[(%reg1)], %reg2".
3074
3075 Avoid optimizing _DYNAMIC since ld.so may use its
3076 link-time address. */
3077 if (h == htab->elf.hdynamic)
3078 continue;
3079
ead3d542
L		 3080 /* def_regular is set by an assignment in a linker script in
3081 bfd_elf_record_link_assignment. */
3082 if ((h->def_regular
3083 || h->root.type == bfd_link_hash_defined
3084 || h->root.type == bfd_link_hash_defweak)
02a86693
L		 3085 && SYMBOL_REFERENCES_LOCAL (link_info, h))
3086 {
3087convert_load:
3088 if (opcode == 0x8b)
3089 {
3090 /* Convert "mov foo@GOT(%reg1), %reg2" to
3091 "lea foo@GOTOFF(%reg1), %reg2". */
3092 if (r_type == R_386_GOT32X
3093 && (baseless || !bfd_link_pic (link_info)))
3094 {
3095 r_type = R_386_32;
3096 /* For R_386_32, convert
3097 "lea foo@GOTOFF(%reg1), %reg2" to
3098 "lea foo@GOT, %reg2". */
3099 if (!baseless)
3100 {
3101 modrm = 0x5 | (modrm & 0x38);
3102 bfd_put_8 (abfd, modrm, contents + roff - 1);
3103 }
3104 }
3105 else
3106 r_type = R_386_GOTOFF;
3107 opcode = 0x8d;
3108 }
3109 else
3110 {
02a86693
L		 3111 if (opcode == 0x85)
3112 {
3113 /* Convert "test %reg1, foo@GOT(%reg2)" to
3114 "test $foo, %reg1". */
3115 modrm = 0xc0 | (modrm & 0x38) >> 3;
3116 opcode = 0xf7;
3117 }
3118 else
3119 {
3120 /* Convert "binop foo@GOT(%reg1), %reg2" to
3121 "binop $foo, %reg2". */
3122 modrm = (0xc0
3123 | (modrm & 0x38) >> 3
3124 | (opcode & 0x3c));
3125 opcode = 0x81;
3126 }
3127 bfd_put_8 (abfd, modrm, contents + roff - 1);
3128 r_type = R_386_32;
3129 }
3130
3131 bfd_put_8 (abfd, opcode, contents + roff - 2);
3132 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
3133
3134 if (h)
3135 {
3136 if (h->got.refcount > 0)
3137 h->got.refcount -= 1;
3138 }
3139 else
3140 {
3141 if (local_got_refcounts != NULL
3142 && local_got_refcounts[r_symndx] > 0)
3143 local_got_refcounts[r_symndx] -= 1;
3144 }
3145
3146 changed_contents = TRUE;
3147 changed_relocs = TRUE;
3148 }
daa67607
L		 3149 }
3150 }
3151
3152 if (contents != NULL
3153 && elf_section_data (sec)->this_hdr.contents != contents)
3154 {
3155 if (!changed_contents && !link_info->keep_memory)
3156 free (contents);
3157 else
3158 {
3159 /* Cache the section contents for elf_link_input_bfd. */
3160 elf_section_data (sec)->this_hdr.contents = contents;
3161 }
3162 }
3163
3164 if (elf_section_data (sec)->relocs != internal_relocs)
3165 {
3166 if (!changed_relocs)
3167 free (internal_relocs);
3168 else
3169 elf_section_data (sec)->relocs = internal_relocs;
3170 }
3171
3172 return TRUE;
3173
3174 error_return:
3175 if (contents != NULL
3176 && elf_section_data (sec)->this_hdr.contents != contents)
3177 free (contents);
3178 if (internal_relocs != NULL
3179 && elf_section_data (sec)->relocs != internal_relocs)
3180 free (internal_relocs);
3181 return FALSE;
3182}
3183
252b5132
RH		 3184/* Set the sizes of the dynamic sections. */
3185
b34976b6 3186static bfd_boolean
23209a78 3187elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
252b5132 3188{
6725bdbf 3189 struct elf_i386_link_hash_table *htab;
252b5132
RH		 3190 bfd *dynobj;
3191 asection *s;
b34976b6 3192 bfd_boolean relocs;
0c715baa 3193 bfd *ibfd;
252b5132 3194
6725bdbf 3195 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 3196 if (htab == NULL)
3197 return FALSE;
ebe50bae 3198 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 3199 if (dynobj == NULL)
3200 abort ();
252b5132 3201
ebe50bae 3202 if (htab->elf.dynamic_sections_created)
252b5132
RH		 3203 {
3204 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 3205 if (bfd_link_executable (info) && !info->nointerp)
252b5132 3206 {
3d4d4302 3207 s = bfd_get_linker_section (dynobj, ".interp");
ffb2e45b
AM		 3208 if (s == NULL)
3209 abort ();
eea6121a 3210 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132 3211 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
aec6b87e 3212 htab->interp = s;
252b5132 3213 }
161d71a6 3214 }
6725bdbf 3215
0c715baa
AM		 3216 /* Set up .got offsets for local syms, and space for local dynamic
3217 relocs. */
c72f2fb2 3218 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
161d71a6
L		 3219 {
3220 bfd_signed_vma *local_got;
3221 bfd_signed_vma *end_local_got;
13ae64f3 3222 char *local_tls_type;
67a4f2b7 3223 bfd_vma *local_tlsdesc_gotent;
161d71a6
L		 3224 bfd_size_type locsymcount;
3225 Elf_Internal_Shdr *symtab_hdr;
3226 asection *srel;
6725bdbf 3227
0ffa91dd 3228 if (! is_i386_elf (ibfd))
161d71a6 3229 continue;
6725bdbf 3230
0c715baa
AM		 3231 for (s = ibfd->sections; s != NULL; s = s->next)
3232 {
e03a8ed8 3233 struct elf_dyn_relocs *p;
0c715baa 3234
02a86693 3235 if (!elf_i386_convert_load (ibfd, s, info))
daa67607
L		 3236 return FALSE;
3237
e03a8ed8 3238 for (p = ((struct elf_dyn_relocs *)
e81d3500 3239 elf_section_data (s)->local_dynrel);
ec338859
AM		 3240 p != NULL;
3241 p = p->next)
0c715baa 3242 {
ec338859
AM		 3243 if (!bfd_is_abs_section (p->sec)
3244 && bfd_is_abs_section (p->sec->output_section))
3245 {
3246 /* Input section has been discarded, either because
3247 it is a copy of a linkonce section or due to
3248 linker script /DISCARD/, so we'll be discarding
3249 the relocs too. */
3250 }
23209a78 3251 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3348747a
NS		 3252 && strcmp (p->sec->output_section->name,
3253 ".tls_vars") == 0)
3254 {
3255 /* Relocations in vxworks .tls_vars sections are
3256 handled specially by the loader. */
3257 }
248866a8 3258 else if (p->count != 0)
ec338859
AM		 3259 {
3260 srel = elf_section_data (p->sec)->sreloc;
eea6121a 3261 srel->size += p->count * sizeof (Elf32_External_Rel);
4b819e1f
L		 3262 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3263 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 3264 {
3265 info->flags |= DF_TEXTREL;
0e1862bb 3266 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd
L		 3267 || info->error_textrel)
3268 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
b70321a2 3269 p->sec->owner, p->sec);
b70321a2 3270 }
ec338859 3271 }
0c715baa
AM		 3272 }
3273 }
3274
3275 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 3276 if (!local_got)
3277 continue;
6725bdbf 3278
0ffa91dd 3279 symtab_hdr = &elf_symtab_hdr (ibfd);
161d71a6
L		 3280 locsymcount = symtab_hdr->sh_info;
3281 end_local_got = local_got + locsymcount;
13ae64f3 3282 local_tls_type = elf_i386_local_got_tls_type (ibfd);
67a4f2b7 3283 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 3284 s = htab->elf.sgot;
3285 srel = htab->elf.srelgot;
67a4f2b7
AO		 3286 for (; local_got < end_local_got;
3287 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
161d71a6 3288 {
67a4f2b7 3289 *local_tlsdesc_gotent = (bfd_vma) -1;
161d71a6 3290 if (*local_got > 0)
6725bdbf 3291 {
67a4f2b7
AO		 3292 if (GOT_TLS_GDESC_P (*local_tls_type))
3293 {
6de2ae4a 3294 *local_tlsdesc_gotent = htab->elf.sgotplt->size
67a4f2b7 3295 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 3296 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 3297 *local_got = (bfd_vma) -2;
3298 }
3299 if (! GOT_TLS_GDESC_P (*local_tls_type)
3300 || GOT_TLS_GD_P (*local_tls_type))
3301 {
3302 *local_got = s->size;
3303 s->size += 4;
3304 if (GOT_TLS_GD_P (*local_tls_type)
3305 || *local_tls_type == GOT_TLS_IE_BOTH)
3306 s->size += 4;
3307 }
0e1862bb 3308 if (bfd_link_pic (info)
67a4f2b7 3309 || GOT_TLS_GD_ANY_P (*local_tls_type)
37e55690
JJ		 3310 || (*local_tls_type & GOT_TLS_IE))
3311 {
3312 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 3313 srel->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 3314 else if (GOT_TLS_GD_P (*local_tls_type)
3315 || ! GOT_TLS_GDESC_P (*local_tls_type))
eea6121a 3316 srel->size += sizeof (Elf32_External_Rel);
67a4f2b7 3317 if (GOT_TLS_GDESC_P (*local_tls_type))
6de2ae4a 3318 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
37e55690 3319 }
6725bdbf 3320 }
161d71a6
L		 3321 else
3322 *local_got = (bfd_vma) -1;
6725bdbf 3323 }
252b5132 3324 }
6725bdbf 3325
13ae64f3
JJ		 3326 if (htab->tls_ldm_got.refcount > 0)
3327 {
3328 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3329 relocs. */
6de2ae4a
L		 3330 htab->tls_ldm_got.offset = htab->elf.sgot->size;
3331 htab->elf.sgot->size += 8;
3332 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 3333 }
3334 else
3335 htab->tls_ldm_got.offset = -1;
3336
0c715baa
AM		 3337 /* Allocate global sym .plt and .got entries, and space for global
3338 sym dynamic relocs. */
eb4ff4d6 3339 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
252b5132 3340
c25bc9fc
L		 3341 /* Allocate .plt and .got entries, and space for local symbols. */
3342 htab_traverse (htab->loc_hash_table,
3343 elf_i386_allocate_local_dynrelocs,
3344 info);
3345
67a4f2b7
AO		 3346 /* For every jump slot reserved in the sgotplt, reloc_count is
3347 incremented. However, when we reserve space for TLS descriptors,
3348 it's not incremented, so in order to compute the space reserved
3349 for them, it suffices to multiply the reloc count by the jump
e1f98742 3350 slot size.
caa0075c 3351
e1f98742
L		 3352 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3353 so that R_386_IRELATIVE entries come last. */
6de2ae4a 3354 if (htab->elf.srelplt)
e1f98742
L		 3355 {
3356 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
3357 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
3358 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3359 }
3360 else if (htab->elf.irelplt)
3361 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3362
67a4f2b7 3363
a7b16ceb
L		 3364 if (htab->elf.sgotplt)
3365 {
3366 /* Don't allocate .got.plt section if there are no GOT nor PLT
9a2a56cc 3367 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 3368 if ((htab->elf.hgot == NULL
3369 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 3370 && (htab->elf.sgotplt->size
3371 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 3372 && (htab->elf.splt == NULL
3373 || htab->elf.splt->size == 0)
3374 && (htab->elf.sgot == NULL
3375 || htab->elf.sgot->size == 0)
3376 && (htab->elf.iplt == NULL
3377 || htab->elf.iplt->size == 0)
3378 && (htab->elf.igotplt == NULL
3379 || htab->elf.igotplt->size == 0))
3380 htab->elf.sgotplt->size = 0;
3381 }
3382
9a2a56cc
AM		 3383
3384 if (htab->plt_eh_frame != NULL
3385 && htab->elf.splt != NULL
3386 && htab->elf.splt->size != 0
3387 && !bfd_is_abs_section (htab->elf.splt->output_section)
3388 && _bfd_elf_eh_frame_present (info))
3389 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3390
5a15f56f
AM		 3391 /* We now have determined the sizes of the various dynamic sections.
3392 Allocate memory for them. */
b34976b6 3393 relocs = FALSE;
252b5132
RH		 3394 for (s = dynobj->sections; s != NULL; s = s->next)
3395 {
eac338cf
PB		 3396 bfd_boolean strip_section = TRUE;
3397
252b5132
RH		 3398 if ((s->flags & SEC_LINKER_CREATED) == 0)
3399 continue;
3400
6de2ae4a 3401 if (s == htab->elf.splt
9a2a56cc 3402 || s == htab->elf.sgot)
252b5132 3403 {
6725bdbf
AM		 3404 /* Strip this section if we don't need it; see the
3405 comment below. */
eac338cf
PB		 3406 /* We'd like to strip these sections if they aren't needed, but if
3407 we've exported dynamic symbols from them we must leave them.
3408 It's too late to tell BFD to get rid of the symbols. */
3409
7325306f 3410 if (htab->elf.hplt != NULL)
eac338cf 3411 strip_section = FALSE;
252b5132 3412 }
9a2a56cc
AM		 3413 else if (s == htab->elf.sgotplt
3414 || s == htab->elf.iplt
3415 || s == htab->elf.igotplt
dd7e64d4 3416 || s == htab->plt_got
9a2a56cc
AM		 3417 || s == htab->plt_eh_frame
3418 || s == htab->sdynbss)
3419 {
3420 /* Strip these too. */
3421 }
0112cd26 3422 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
252b5132 3423 {
6de2ae4a
L		 3424 if (s->size != 0
3425 && s != htab->elf.srelplt
3426 && s != htab->srelplt2)
b34976b6 3427 relocs = TRUE;
252b5132 3428
0ac8d2ca
AM		 3429 /* We use the reloc_count field as a counter if we need
3430 to copy relocs into the output file. */
5ae0bfb6 3431 s->reloc_count = 0;
252b5132 3432 }
6725bdbf 3433 else
252b5132
RH		 3434 {
3435 /* It's not one of our sections, so don't allocate space. */
3436 continue;
3437 }
3438
c456f082 3439 if (s->size == 0)
252b5132 3440 {
0ac8d2ca
AM		 3441 /* If we don't need this section, strip it from the
3442 output file. This is mostly to handle .rel.bss and
3443 .rel.plt. We must create both sections in
3444 create_dynamic_sections, because they must be created
3445 before the linker maps input sections to output
3446 sections. The linker does that before
3447 adjust_dynamic_symbol is called, and it is that
3448 function which decides whether anything needs to go
3449 into these sections. */
c456f082
AM		 3450 if (strip_section)
3451 s->flags |= SEC_EXCLUDE;
252b5132
RH		 3452 continue;
3453 }
3454
c456f082
AM		 3455 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3456 continue;
3457
f69da49f
AM		 3458 /* Allocate memory for the section contents. We use bfd_zalloc
3459 here in case unused entries are not reclaimed before the
3460 section's contents are written out. This should not happen,
3461 but this way if it does, we get a R_386_NONE reloc instead
3462 of garbage. */
a50b1753 3463 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
6725bdbf 3464 if (s->contents == NULL)
b34976b6 3465 return FALSE;
252b5132
RH		 3466 }
3467
e41b3a13 3468 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 3469 && htab->plt_eh_frame->contents != NULL)
3470 {
3471 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3472 sizeof (elf_i386_eh_frame_plt));
3473 bfd_put_32 (dynobj, htab->elf.splt->size,
3474 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3475 }
e41b3a13 3476
ebe50bae 3477 if (htab->elf.dynamic_sections_created)
252b5132
RH		 3478 {
3479 /* Add some entries to the .dynamic section. We fill in the
3480 values later, in elf_i386_finish_dynamic_sections, but we
3481 must add the entries now so that we get the correct size for
3482 the .dynamic section. The DT_DEBUG entry is filled in by the
3483 dynamic linker and used by the debugger. */
dc810e39 3484#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3485 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3486
0e1862bb 3487 if (bfd_link_executable (info))
252b5132 3488 {
dc810e39 3489 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3490 return FALSE;
252b5132
RH		 3491 }
3492
6de2ae4a 3493 if (htab->elf.splt->size != 0)
252b5132 3494 {
7c1e8d3e
L		 3495 /* DT_PLTGOT is used by prelink even if there is no PLT
3496 relocation. */
3497 if (!add_dynamic_entry (DT_PLTGOT, 0))
b34976b6 3498 return FALSE;
7c1e8d3e
L		 3499
3500 if (htab->elf.srelplt->size != 0)
3501 {
3502 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3503 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3504 || !add_dynamic_entry (DT_JMPREL, 0))
3505 return FALSE;
3506 }
252b5132
RH		 3507 }
3508
3509 if (relocs)
3510 {
dc810e39
AM		 3511 if (!add_dynamic_entry (DT_REL, 0)
3512 || !add_dynamic_entry (DT_RELSZ, 0)
3513 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 3514 return FALSE;
252b5132 3515
0c715baa
AM		 3516 /* If any dynamic relocs apply to a read-only section,
3517 then we need a DT_TEXTREL entry. */
248866a8 3518 if ((info->flags & DF_TEXTREL) == 0)
eb4ff4d6
L		 3519 elf_link_hash_traverse (&htab->elf,
3520 elf_i386_readonly_dynrelocs, info);
0c715baa
AM		 3521
3522 if ((info->flags & DF_TEXTREL) != 0)
3523 {
8efa2874
L		 3524 if ((elf_tdata (output_bfd)->has_gnu_symbols
3525 & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc)
3526 {
3527 info->callbacks->einfo
3528 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3529 bfd_set_error (bfd_error_bad_value);
3530 return FALSE;
3531 }
3532
0c715baa 3533 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3534 return FALSE;
0c715baa 3535 }
252b5132 3536 }
23209a78 3537 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
7a2b07ff
NS		 3538 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3539 return FALSE;
252b5132 3540 }
dc810e39 3541#undef add_dynamic_entry
252b5132 3542
b34976b6 3543 return TRUE;
252b5132
RH		 3544}
3545
67a4f2b7
AO		 3546static bfd_boolean
3547elf_i386_always_size_sections (bfd *output_bfd,
3548 struct bfd_link_info *info)
3549{
3550 asection *tls_sec = elf_hash_table (info)->tls_sec;
3551
3552 if (tls_sec)
3553 {
3554 struct elf_link_hash_entry *tlsbase;
3555
3556 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3557 "_TLS_MODULE_BASE_",
3558 FALSE, FALSE, FALSE);
3559
3560 if (tlsbase && tlsbase->type == STT_TLS)
3561 {
4dfe6ac6 3562 struct elf_i386_link_hash_table *htab;
67a4f2b7
AO		 3563 struct bfd_link_hash_entry *bh = NULL;
3564 const struct elf_backend_data *bed
3565 = get_elf_backend_data (output_bfd);
3566
4dfe6ac6
NC		 3567 htab = elf_i386_hash_table (info);
3568 if (htab == NULL)
3569 return FALSE;
3570
67a4f2b7
AO		 3571 if (!(_bfd_generic_link_add_one_symbol
3572 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3573 tls_sec, 0, NULL, FALSE,
3574 bed->collect, &bh)))
3575 return FALSE;
9f03412a 3576
4dfe6ac6 3577 htab->tls_module_base = bh;
9f03412a 3578
67a4f2b7
AO		 3579 tlsbase = (struct elf_link_hash_entry *)bh;
3580 tlsbase->def_regular = 1;
3581 tlsbase->other = STV_HIDDEN;
576fa883 3582 tlsbase->root.linker_def = 1;
67a4f2b7
AO		 3583 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3584 }
3585 }
3586
3587 return TRUE;
3588}
3589
38701953
AM		 3590/* Set the correct type for an x86 ELF section. We do this by the
3591 section name, which is a hack, but ought to work. */
3592
b34976b6 3593static bfd_boolean
55fd94b0
AM		 3594elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3595 Elf_Internal_Shdr *hdr,
3596 asection *sec)
38701953 3597{
91d6fa6a 3598 const char *name;
38701953
AM		 3599
3600 name = bfd_get_section_name (abfd, sec);
3601
3602 /* This is an ugly, but unfortunately necessary hack that is
3603 needed when producing EFI binaries on x86. It tells
3604 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3605 containing ELF relocation info. We need this hack in order to
3606 be able to generate ELF binaries that can be translated into
3607 EFI applications (which are essentially COFF objects). Those
3608 files contain a COFF ".reloc" section inside an ELFNN object,
3609 which would normally cause BFD to segfault because it would
3610 attempt to interpret this section as containing relocation
3611 entries for section "oc". With this hack enabled, ".reloc"
3612 will be treated as a normal data section, which will avoid the
3613 segfault. However, you won't be able to create an ELFNN binary
3614 with a section named "oc" that needs relocations, but that's
3615 the kind of ugly side-effects you get when detecting section
3616 types based on their names... In practice, this limitation is
3617 unlikely to bite. */
3618 if (strcmp (name, ".reloc") == 0)
3619 hdr->sh_type = SHT_PROGBITS;
3620
b34976b6 3621 return TRUE;
38701953
AM		 3622}
3623
9f03412a
AO		 3624/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3625 executables. Rather than setting it to the beginning of the TLS
3626 section, we have to set it to the end. This function may be called
3627 multiple times, it is idempotent. */
3628
3629static void
eb4ff4d6 3630elf_i386_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3631{
4dfe6ac6 3632 struct elf_i386_link_hash_table *htab;
9f03412a
AO		 3633 struct bfd_link_hash_entry *base;
3634
0e1862bb 3635 if (!bfd_link_executable (info))
9f03412a
AO		 3636 return;
3637
4dfe6ac6
NC		 3638 htab = elf_i386_hash_table (info);
3639 if (htab == NULL)
3640 return;
9f03412a 3641
4dfe6ac6
NC		 3642 base = htab->tls_module_base;
3643 if (base == NULL)
9f03412a
AO		 3644 return;
3645
4dfe6ac6 3646 base->u.def.value = htab->elf.tls_size;
9f03412a
AO		 3647}
3648
13ae64f3
JJ		 3649/* Return the base VMA address which should be subtracted from real addresses
3650 when resolving @dtpoff relocation.
3651 This is PT_TLS segment p_vaddr. */
3652
3653static bfd_vma
eb4ff4d6 3654elf_i386_dtpoff_base (struct bfd_link_info *info)
13ae64f3 3655{
e1918d23
AM		 3656 /* If tls_sec is NULL, we should have signalled an error already. */
3657 if (elf_hash_table (info)->tls_sec == NULL)
6a30718d 3658 return 0;
e1918d23 3659 return elf_hash_table (info)->tls_sec->vma;
13ae64f3
JJ		 3660}
3661
3662/* Return the relocation value for @tpoff relocation
3663 if STT_TLS virtual address is ADDRESS. */
3664
3665static bfd_vma
eb4ff4d6 3666elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 3667{
e1918d23 3668 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3669 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3670 bfd_vma static_tls_size;
13ae64f3 3671
e1918d23
AM		 3672 /* If tls_sec is NULL, we should have signalled an error already. */
3673 if (htab->tls_sec == NULL)
6a30718d 3674 return 0;
7dc98aea
RO		 3675
3676 /* Consider special static TLS alignment requirements. */
3677 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3678 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 3679}
3680
252b5132
RH		 3681/* Relocate an i386 ELF section. */
3682
b34976b6 3683static bfd_boolean
55fd94b0
AM		 3684elf_i386_relocate_section (bfd *output_bfd,
3685 struct bfd_link_info *info,
3686 bfd *input_bfd,
3687 asection *input_section,
3688 bfd_byte *contents,
3689 Elf_Internal_Rela *relocs,
3690 Elf_Internal_Sym *local_syms,
3691 asection **local_sections)
252b5132 3692{
6725bdbf 3693 struct elf_i386_link_hash_table *htab;
252b5132
RH		 3694 Elf_Internal_Shdr *symtab_hdr;
3695 struct elf_link_hash_entry **sym_hashes;
3696 bfd_vma *local_got_offsets;
67a4f2b7 3697 bfd_vma *local_tlsdesc_gotents;
252b5132 3698 Elf_Internal_Rela *rel;
60f2e42e 3699 Elf_Internal_Rela *wrel;
252b5132 3700 Elf_Internal_Rela *relend;
3348747a 3701 bfd_boolean is_vxworks_tls;
25e762b9 3702 unsigned plt_entry_size;
252b5132 3703
0ffa91dd 3704 BFD_ASSERT (is_i386_elf (input_bfd));
6bbec505 3705
6725bdbf 3706 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 3707 if (htab == NULL)
3708 return FALSE;
0ffa91dd 3709 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 3710 sym_hashes = elf_sym_hashes (input_bfd);
3711 local_got_offsets = elf_local_got_offsets (input_bfd);
67a4f2b7 3712 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 3713 /* We have to handle relocations in vxworks .tls_vars sections
3714 specially, because the dynamic loader is 'weird'. */
23209a78 3715 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
0e1862bb 3716 && bfd_link_pic (info)
3348747a
NS		 3717 && !strcmp (input_section->output_section->name,
3718 ".tls_vars"));
252b5132 3719
eb4ff4d6 3720 elf_i386_set_tls_module_base (info);
9f03412a 3721
25e762b9
RM		 3722 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3723
60f2e42e 3724 rel = wrel = relocs;
252b5132 3725 relend = relocs + input_section->reloc_count;
60f2e42e 3726 for (; rel < relend; wrel++, rel++)
252b5132 3727 {
13ae64f3 3728 unsigned int r_type;
252b5132
RH		 3729 reloc_howto_type *howto;
3730 unsigned long r_symndx;
3731 struct elf_link_hash_entry *h;
dd7e64d4 3732 struct elf_i386_link_hash_entry *eh;
252b5132
RH		 3733 Elf_Internal_Sym *sym;
3734 asection *sec;
dd7e64d4 3735 bfd_vma off, offplt, plt_offset;
252b5132 3736 bfd_vma relocation;
b34976b6 3737 bfd_boolean unresolved_reloc;
252b5132 3738 bfd_reloc_status_type r;
1b452ec6 3739 unsigned int indx;
13ae64f3 3740 int tls_type;
1788fc08 3741 bfd_vma st_size;
dd7e64d4 3742 asection *resolved_plt;
aec6b87e 3743 bfd_boolean resolved_to_zero;
252b5132
RH		 3744
3745 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 3746 if (r_type == R_386_GNU_VTINHERIT
3747 || r_type == R_386_GNU_VTENTRY)
18954b29
L		 3748 {
3749 if (wrel != rel)
3750 *wrel = *rel;
3751 continue;
3752 }
dc47f327 3753
55fd94b0 3754 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 3755 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3756 >= R_386_ext - R_386_standard)
3757 && ((indx = r_type - R_386_tls_offset) - R_386_ext
c74be520 3758 >= R_386_ext2 - R_386_ext))
252b5132 3759 {
6ba842b6 3760 (*_bfd_error_handler)
d003868e
AM		 3761 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3762 input_bfd, input_section, r_type);
252b5132 3763 bfd_set_error (bfd_error_bad_value);
b34976b6 3764 return FALSE;
252b5132 3765 }
1b452ec6 3766 howto = elf_howto_table + indx;
252b5132
RH		 3767
3768 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 3769 h = NULL;
3770 sym = NULL;
3771 sec = NULL;
b34976b6 3772 unresolved_reloc = FALSE;
252b5132
RH		 3773 if (r_symndx < symtab_hdr->sh_info)
3774 {
3775 sym = local_syms + r_symndx;
3776 sec = local_sections[r_symndx];
3777 relocation = (sec->output_section->vma
3778 + sec->output_offset
3779 + sym->st_value);
1788fc08 3780 st_size = sym->st_size;
ab96bf03
AM		 3781
3782 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3783 && ((sec->flags & SEC_MERGE) != 0
0e1862bb 3784 || (bfd_link_relocatable (info)
ab96bf03 3785 && sec->output_offset != 0)))
f8df10f4 3786 {
f8df10f4 3787 bfd_vma addend;
4a335f3d 3788 bfd_byte *where = contents + rel->r_offset;
f8df10f4 3789
4a335f3d 3790 switch (howto->size)
f8df10f4 3791 {
4a335f3d
AM		 3792 case 0:
3793 addend = bfd_get_8 (input_bfd, where);
3794 if (howto->pc_relative)
3795 {
3796 addend = (addend ^ 0x80) - 0x80;
3797 addend += 1;
3798 }
3799 break;
3800 case 1:
3801 addend = bfd_get_16 (input_bfd, where);
3802 if (howto->pc_relative)
3803 {
3804 addend = (addend ^ 0x8000) - 0x8000;
3805 addend += 2;
3806 }
3807 break;
3808 case 2:
3809 addend = bfd_get_32 (input_bfd, where);
3810 if (howto->pc_relative)
3811 {
3812 addend = (addend ^ 0x80000000) - 0x80000000;
3813 addend += 4;
3814 }
3815 break;
3816 default:
3817 abort ();
f8df10f4
JJ		 3818 }
3819
0e1862bb 3820 if (bfd_link_relocatable (info))
ab96bf03
AM		 3821 addend += sec->output_offset;
3822 else
3823 {
3824 asection *msec = sec;
3825 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3826 addend);
3827 addend -= relocation;
3828 addend += msec->output_section->vma + msec->output_offset;
3829 }
4a335f3d
AM		 3830
3831 switch (howto->size)
3832 {
3833 case 0:
16a10388 3834 /* FIXME: overflow checks. */
4a335f3d
AM		 3835 if (howto->pc_relative)
3836 addend -= 1;
3837 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 3838 break;
3839 case 1:
3840 if (howto->pc_relative)
3841 addend -= 2;
3842 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 3843 break;
3844 case 2:
3845 if (howto->pc_relative)
3846 addend -= 4;
3847 bfd_put_32 (input_bfd, addend, where);
3848 break;
3849 }
f8df10f4 3850 }
0e1862bb 3851 else if (!bfd_link_relocatable (info)
1f85278f 3852 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 3853 {
3854 /* Relocate against local STT_GNU_IFUNC symbol. */
9fff0c39
L		 3855 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3856 FALSE);
c25bc9fc
L		 3857 if (h == NULL)
3858 abort ();
3859
23209a78 3860 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3861 h->root.u.def.value = sym->st_value;
3862 h->root.u.def.section = sec;
3863 }
252b5132
RH		 3864 }
3865 else
3866 {
3d540e93 3867 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 3868 bfd_boolean ignored ATTRIBUTE_UNUSED;
ffb2e45b 3869
b2a8e766
AM		 3870 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3871 r_symndx, symtab_hdr, sym_hashes,
3872 h, sec, relocation,
62d887d4 3873 unresolved_reloc, warned, ignored);
1788fc08 3874 st_size = h->size;
252b5132
RH		 3875 }
3876
dbaa2011 3877 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 3878 {
3879 _bfd_clear_contents (howto, input_bfd, input_section,
3880 contents + rel->r_offset);
3881 wrel->r_offset = rel->r_offset;
3882 wrel->r_info = 0;
3883 wrel->r_addend = 0;
3884
3885 /* For ld -r, remove relocations in debug sections against
3886 sections defined in discarded sections. Not done for
3887 eh_frame editing code expects to be present. */
3888 if (bfd_link_relocatable (info)
3889 && (input_section->flags & SEC_DEBUGGING))
3890 wrel--;
3891
3892 continue;
3893 }
9635fe29 3894
0e1862bb 3895 if (bfd_link_relocatable (info))
2d5da473
L		 3896 {
3897 if (wrel != rel)
3898 *wrel = *rel;
3899 continue;
3900 }
ab96bf03 3901
cbe950e9
L		 3902 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3903 it here if it is defined in a non-shared object. */
3904 if (h != NULL
3905 && h->type == STT_GNU_IFUNC
3906 && h->def_regular)
3907 {
3908 asection *plt, *gotplt, *base_got;
3909 bfd_vma plt_index;
4c544807 3910 const char *name;
cbe950e9 3911
97dc35c8
L		 3912 if ((input_section->flags & SEC_ALLOC) == 0)
3913 {
3914 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3915 sections because such sections are not SEC_ALLOC and
3916 thus ld.so will not process them. */
3917 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 3918 continue;
97dc35c8
L		 3919 abort ();
3920 }
3921 else if (h->plt.offset == (bfd_vma) -1)
cbe950e9
L		 3922 abort ();
3923
3924 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3925 if (htab->elf.splt != NULL)
cbe950e9 3926 {
6de2ae4a
L		 3927 plt = htab->elf.splt;
3928 gotplt = htab->elf.sgotplt;
cbe950e9
L		 3929 }
3930 else
3931 {
6de2ae4a
L		 3932 plt = htab->elf.iplt;
3933 gotplt = htab->elf.igotplt;
cbe950e9
L		 3934 }
3935
3936 relocation = (plt->output_section->vma
3937 + plt->output_offset + h->plt.offset);
3938
3939 switch (r_type)
3940 {
3941 default:
4c544807
L		 3942 if (h->root.root.string)
3943 name = h->root.root.string;
3944 else
3945 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3946 NULL);
cbe950e9
L		 3947 (*_bfd_error_handler)
3948 (_("%B: relocation %s against STT_GNU_IFUNC "
3949 "symbol `%s' isn't handled by %s"), input_bfd,
3950 elf_howto_table[r_type].name,
4c544807 3951 name, __FUNCTION__);
cbe950e9
L		 3952 bfd_set_error (bfd_error_bad_value);
3953 return FALSE;
3954
3955 case R_386_32:
710ab287 3956 /* Generate dynamic relcoation only when there is a
c293fa49 3957 non-GOT reference in a shared object. */
0e1862bb 3958 if (bfd_link_pic (info) && h->non_got_ref)
710ab287
L		 3959 {
3960 Elf_Internal_Rela outrel;
710ab287
L		 3961 asection *sreloc;
3962 bfd_vma offset;
3963
c25bc9fc
L		 3964 /* Need a dynamic relocation to get the real function
3965 adddress. */
710ab287
L		 3966 offset = _bfd_elf_section_offset (output_bfd,
3967 info,
3968 input_section,
3969 rel->r_offset);
3970 if (offset == (bfd_vma) -1
3971 || offset == (bfd_vma) -2)
3972 abort ();
3973
3974 outrel.r_offset = (input_section->output_section->vma
3975 + input_section->output_offset
3976 + offset);
3977
3978 if (h->dynindx == -1
44c4ea11 3979 || h->forced_local
0e1862bb 3980 || bfd_link_executable (info))
710ab287
L		 3981 {
3982 /* This symbol is resolved locally. */
56b8aada
L		 3983 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3984 bfd_put_32 (output_bfd,
3985 (h->root.u.def.value
3986 + h->root.u.def.section->output_section->vma
3987 + h->root.u.def.section->output_offset),
3988 contents + offset);
710ab287
L		 3989 }
3990 else
56b8aada 3991 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
710ab287 3992
6de2ae4a 3993 sreloc = htab->elf.irelifunc;
59d6ffb2 3994 elf_append_rel (output_bfd, sreloc, &outrel);
710ab287
L		 3995
3996 /* If this reloc is against an external symbol, we
3997 do not want to fiddle with the addend. Otherwise,
3998 we need to include the symbol value so that it
3999 becomes an addend for the dynamic reloc. For an
4000 internal symbol, we have updated addend. */
56b8aada 4001 continue;
710ab287 4002 }
d59a60e9 4003 /* FALLTHROUGH */
cbe950e9
L		 4004 case R_386_PC32:
4005 case R_386_PLT32:
4006 goto do_relocation;
4007
4008 case R_386_GOT32:
02a86693 4009 case R_386_GOT32X:
6de2ae4a 4010 base_got = htab->elf.sgot;
cbe950e9
L		 4011 off = h->got.offset;
4012
7afd84dc 4013 if (base_got == NULL)
cbe950e9
L		 4014 abort ();
4015
7afd84dc 4016 if (off == (bfd_vma) -1)
cbe950e9 4017 {
7afd84dc
L		 4018 /* We can't use h->got.offset here to save state, or
4019 even just remember the offset, as finish_dynamic_symbol
4020 would use that as offset into .got. */
6bbec505 4021
6de2ae4a 4022 if (htab->elf.splt != NULL)
7afd84dc 4023 {
25e762b9 4024 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 4025 off = (plt_index + 3) * 4;
6de2ae4a 4026 base_got = htab->elf.sgotplt;
7afd84dc 4027 }
cbe950e9
L		 4028 else
4029 {
25e762b9 4030 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 4031 off = plt_index * 4;
6de2ae4a 4032 base_got = htab->elf.igotplt;
7afd84dc
L		 4033 }
4034
4035 if (h->dynindx == -1
4036 || h->forced_local
4037 || info->symbolic)
4038 {
4039 /* This references the local defitionion. We must
4040 initialize this entry in the global offset table.
4041 Since the offset must always be a multiple of 8,
4042 we use the least significant bit to record
4043 whether we have initialized it already.
4044
4045 When doing a dynamic link, we create a .rela.got
4046 relocation entry to initialize the value. This
4047 is done in the finish_dynamic_symbol routine. */
4048 if ((off & 1) != 0)
4049 off &= ~1;
4050 else
4051 {
4052 bfd_put_32 (output_bfd, relocation,
4053 base_got->contents + off);
4054 h->got.offset |= 1;
4055 }
cbe950e9 4056 }
cbe950e9 4057
7afd84dc 4058 relocation = off;
cbe950e9 4059
7afd84dc 4060 /* Adjust for static executables. */
6de2ae4a 4061 if (htab->elf.splt == NULL)
7afd84dc
L		 4062 relocation += gotplt->output_offset;
4063 }
4064 else
0018b0a3
L		 4065 {
4066 relocation = (base_got->output_section->vma
4067 + base_got->output_offset + off
4068 - gotplt->output_section->vma
4069 - gotplt->output_offset);
4070 /* Adjust for static executables. */
6de2ae4a 4071 if (htab->elf.splt == NULL)
0018b0a3
L		 4072 relocation += gotplt->output_offset;
4073 }
4074
cbe950e9
L		 4075 goto do_relocation;
4076
4077 case R_386_GOTOFF:
4078 relocation -= (gotplt->output_section->vma
4079 + gotplt->output_offset);
4080 goto do_relocation;
4081 }
4082 }
4083
04ebc307 4084 eh = (struct elf_i386_link_hash_entry *) h;
aec6b87e
L		 4085 resolved_to_zero = (eh != NULL
4086 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
4087
252b5132
RH		 4088 switch (r_type)
4089 {
02a86693
L		 4090 case R_386_GOT32X:
4091 /* Avoid optimizing _DYNAMIC since ld.so may use its
4092 link-time address. */
4093 if (h == htab->elf.hdynamic)
4094 goto r_386_got32;
4095
4096 if (bfd_link_pic (info))
4097 {
4098 /* It is OK to convert mov to lea and convert indirect
4099 branch to direct branch. It is OK to convert adc,
4100 add, and, cmp, or, sbb, sub, test, xor only when PIC
4101 is false. */
02e2aef8
L		 4102 unsigned int opcode, addend;
4103 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
4104 if (addend != 0)
4105 goto r_386_got32;
4106 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
02a86693
L		 4107 if (opcode != 0x8b && opcode != 0xff)
4108 goto r_386_got32;
4109 }
4110
4111 /* Resolve "mov GOT[(%reg)], %reg",
4112 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4113 and "binop foo@GOT[(%reg)], %reg". */
4114 if (h == NULL
4115 || (h->plt.offset == (bfd_vma) -1
4116 && h->got.offset == (bfd_vma) -1)
4117 || htab->elf.sgotplt == NULL)
4118 abort ();
4119
4120 offplt = (htab->elf.sgotplt->output_section->vma
4121 + htab->elf.sgotplt->output_offset);
4122
4123 /* It is relative to .got.plt section. */
4124 if (h->got.offset != (bfd_vma) -1)
32875eb1
L		 4125 /* Use GOT entry. Mask off the least significant bit in
4126 GOT offset which may be set by R_386_GOT32 processing
4127 below. */
02a86693
L		 4128 relocation = (htab->elf.sgot->output_section->vma
4129 + htab->elf.sgot->output_offset
32875eb1 4130 + (h->got.offset & ~1) - offplt);
02a86693
L		 4131 else
4132 /* Use GOTPLT entry. */
4133 relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4;
4134
4135 if (!bfd_link_pic (info))
4136 {
4137 /* If not PIC, add the .got.plt section address for
a3718e9e 4138 baseless addressing. */
02a86693 4139 unsigned int modrm;
02e2aef8 4140 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
02a86693
L		 4141 if ((modrm & 0xc7) == 0x5)
4142 relocation += offplt;
4143 }
4144
4145 unresolved_reloc = FALSE;
4146 break;
4147
252b5132 4148 case R_386_GOT32:
02a86693 4149r_386_got32:
252b5132
RH		 4150 /* Relocation is to the entry for this symbol in the global
4151 offset table. */
6de2ae4a 4152 if (htab->elf.sgot == NULL)
ffb2e45b 4153 abort ();
252b5132
RH		 4154
4155 if (h != NULL)
4156 {
b34976b6 4157 bfd_boolean dyn;
252b5132
RH		 4158
4159 off = h->got.offset;
ebe50bae 4160 dyn = htab->elf.dynamic_sections_created;
0e1862bb
L		 4161 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4162 bfd_link_pic (info),
4163 h)
4164 || (bfd_link_pic (info)
586119b3 4165 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 4166 || (ELF_ST_VISIBILITY (h->other)
4167 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 4168 {
4169 /* This is actually a static link, or it is a
4170 -Bsymbolic link and the symbol is defined
4171 locally, or the symbol was forced to be local
4172 because of a version file. We must initialize
4173 this entry in the global offset table. Since the
4174 offset must always be a multiple of 4, we use the
4175 least significant bit to record whether we have
4176 initialized it already.
4177
4178 When doing a dynamic link, we create a .rel.got
4179 relocation entry to initialize the value. This
4180 is done in the finish_dynamic_symbol routine. */
4181 if ((off & 1) != 0)
4182 off &= ~1;
4183 else
4184 {
4185 bfd_put_32 (output_bfd, relocation,
6de2ae4a 4186 htab->elf.sgot->contents + off);
252b5132
RH		 4187 h->got.offset |= 1;
4188 }
4189 }
8c694914 4190 else
b34976b6 4191 unresolved_reloc = FALSE;
252b5132
RH		 4192 }
4193 else
4194 {
ffb2e45b
AM		 4195 if (local_got_offsets == NULL)
4196 abort ();
252b5132
RH		 4197
4198 off = local_got_offsets[r_symndx];
4199
4200 /* The offset must always be a multiple of 4. We use
83be169b
AM		 4201 the least significant bit to record whether we have
4202 already generated the necessary reloc. */
252b5132
RH		 4203 if ((off & 1) != 0)
4204 off &= ~1;
4205 else
4206 {
6725bdbf 4207 bfd_put_32 (output_bfd, relocation,
6de2ae4a 4208 htab->elf.sgot->contents + off);
252b5132 4209
0e1862bb 4210 if (bfd_link_pic (info))
252b5132 4211 {
947216bf
AM		 4212 asection *s;
4213 Elf_Internal_Rela outrel;
252b5132 4214
6de2ae4a 4215 s = htab->elf.srelgot;
947216bf 4216 if (s == NULL)
ffb2e45b 4217 abort ();
252b5132 4218
6de2ae4a
L		 4219 outrel.r_offset = (htab->elf.sgot->output_section->vma
4220 + htab->elf.sgot->output_offset
252b5132
RH		 4221 + off);
4222 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
59d6ffb2 4223 elf_append_rel (output_bfd, s, &outrel);
252b5132
RH		 4224 }
4225
4226 local_got_offsets[r_symndx] |= 1;
4227 }
252b5132
RH		 4228 }
4229
ffb2e45b
AM		 4230 if (off >= (bfd_vma) -2)
4231 abort ();
4232
6de2ae4a
L		 4233 relocation = htab->elf.sgot->output_section->vma
4234 + htab->elf.sgot->output_offset + off
4235 - htab->elf.sgotplt->output_section->vma
4236 - htab->elf.sgotplt->output_offset;
252b5132
RH		 4237 break;
4238
4239 case R_386_GOTOFF:
4240 /* Relocation is relative to the start of the global offset
4241 table. */
4242
3d949995
L		 4243 /* Check to make sure it isn't a protected function or data
4244 symbol for shared library since it may not be local when
4245 used as function address or with copy relocation. We also
e3c0e327 4246 need to make sure that a symbol is referenced locally. */
0e1862bb 4247 if (!bfd_link_executable (info) && h)
90f487df 4248 {
41bed6dd
L		 4249 if (!h->def_regular)
4250 {
4251 const char *v;
4252
4253 switch (ELF_ST_VISIBILITY (h->other))
4254 {
4255 case STV_HIDDEN:
4256 v = _("hidden symbol");
4257 break;
4258 case STV_INTERNAL:
4259 v = _("internal symbol");
4260 break;
4261 case STV_PROTECTED:
4262 v = _("protected symbol");
4263 break;
4264 default:
4265 v = _("symbol");
4266 break;
4267 }
4268
4269 (*_bfd_error_handler)
4270 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
4271 input_bfd, v, h->root.root.string);
4272 bfd_set_error (bfd_error_bad_value);
4273 return FALSE;
4274 }
d5597ebc 4275 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3d949995
L		 4276 && (h->type == STT_FUNC
4277 || h->type == STT_OBJECT)
41bed6dd
L		 4278 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4279 {
4280 (*_bfd_error_handler)
3d949995
L		 4281 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
4282 input_bfd,
4283 h->type == STT_FUNC ? "function" : "data",
4284 h->root.root.string);
41bed6dd
L		 4285 bfd_set_error (bfd_error_bad_value);
4286 return FALSE;
4287 }
90f487df
L		 4288 }
4289
8c37241b
JJ		 4290 /* Note that sgot is not involved in this
4291 calculation. We always want the start of .got.plt. If we
4292 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 4293 permitted by the ABI, we might have to change this
4294 calculation. */
6de2ae4a
L		 4295 relocation -= htab->elf.sgotplt->output_section->vma
4296 + htab->elf.sgotplt->output_offset;
252b5132
RH		 4297 break;
4298
4299 case R_386_GOTPC:
4300 /* Use global offset table as symbol value. */
6de2ae4a
L		 4301 relocation = htab->elf.sgotplt->output_section->vma
4302 + htab->elf.sgotplt->output_offset;
b34976b6 4303 unresolved_reloc = FALSE;
252b5132
RH		 4304 break;
4305
4306 case R_386_PLT32:
4307 /* Relocation is to the entry for this symbol in the
4308 procedure linkage table. */
4309
dd5724d5 4310 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 4311 without using the procedure linkage table. */
252b5132
RH		 4312 if (h == NULL)
4313 break;
4314
dd7e64d4
L		 4315 if ((h->plt.offset == (bfd_vma) -1
4316 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 4317 || htab->elf.splt == NULL)
252b5132
RH		 4318 {
4319 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 4320 happens when statically linking PIC code, or when
4321 using -Bsymbolic. */
252b5132
RH		 4322 break;
4323 }
4324
dd7e64d4
L		 4325 if (h->plt.offset != (bfd_vma) -1)
4326 {
4327 resolved_plt = htab->elf.splt;
4328 plt_offset = h->plt.offset;
4329 }
4330 else
4331 {
4332 resolved_plt = htab->plt_got;
4333 plt_offset = eh->plt_got.offset;
4334 }
4335
4336 relocation = (resolved_plt->output_section->vma
4337 + resolved_plt->output_offset
4338 + plt_offset);
b34976b6 4339 unresolved_reloc = FALSE;
252b5132
RH		 4340 break;
4341
1788fc08 4342 case R_386_SIZE32:
1788fc08
L		 4343 /* Set to symbol size. */
4344 relocation = st_size;
4345 /* Fall through. */
4346
252b5132
RH		 4347 case R_386_32:
4348 case R_386_PC32:
3348747a
NS		 4349 if ((input_section->flags & SEC_ALLOC) == 0
4350 || is_vxworks_tls)
ec338859
AM		 4351 break;
4352
aec6b87e
L		 4353 /* Copy dynamic function pointer relocations. Don't generate
4354 dynamic relocations against resolved undefined weak symbols
4355 in PIE, except for R_386_PC32. */
0e1862bb 4356 if ((bfd_link_pic (info)
ef5aade5 4357 && (h == NULL
aec6b87e
L		 4358 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4359 && (!resolved_to_zero
4360 || r_type == R_386_PC32))
4361 || h->root.type != bfd_link_hash_undefweak))
1788fc08 4362 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
f6c52c13 4363 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845 4364 || (ELIMINATE_COPY_RELOCS
0e1862bb 4365 && !bfd_link_pic (info)
12d0ee4a
AM		 4366 && h != NULL
4367 && h->dynindx != -1
aec6b87e
L		 4368 && (!h->non_got_ref
4369 || eh->func_pointer_refcount > 0
4370 || (h->root.type == bfd_link_hash_undefweak
4371 && !resolved_to_zero))
f5385ebf
AM		 4372 && ((h->def_dynamic
4373 && !h->def_regular)
28d0b90e 4374 || h->root.type == bfd_link_hash_undefweak
0f88be7a 4375 || h->root.type == bfd_link_hash_undefined)))
252b5132 4376 {
947216bf 4377 Elf_Internal_Rela outrel;
b34976b6 4378 bfd_boolean skip, relocate;
0c715baa 4379 asection *sreloc;
252b5132
RH		 4380
4381 /* When generating a shared object, these relocations
4382 are copied into the output file to be resolved at run
4383 time. */
4384
b34976b6
AM		 4385 skip = FALSE;
4386 relocate = FALSE;
252b5132 4387
c629eae0
JJ		 4388 outrel.r_offset =
4389 _bfd_elf_section_offset (output_bfd, info, input_section,
4390 rel->r_offset);
4391 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 4392 skip = TRUE;
0bb2d96a 4393 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 4394 skip = TRUE, relocate = TRUE;
252b5132
RH		 4395 outrel.r_offset += (input_section->output_section->vma
4396 + input_section->output_offset);
4397
4398 if (skip)
0bb2d96a 4399 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 4400 else if (h != NULL
4401 && h->dynindx != -1
4402 && (r_type == R_386_PC32
0e1862bb 4403 || !bfd_link_pic (info)
55255dae 4404 || !SYMBOLIC_BIND (info, h)
f5385ebf 4405 || !h->def_regular))
0bb2d96a 4406 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 4407 else
4408 {
5a15f56f 4409 /* This symbol is local, or marked to become local. */
b34976b6 4410 relocate = TRUE;
5a15f56f 4411 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 4412 }
4413
cbe950e9 4414 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 4415
62d78908
L		 4416 if (sreloc == NULL || sreloc->contents == NULL)
4417 {
4418 r = bfd_reloc_notsupported;
4419 goto check_relocation_error;
4420 }
0c715baa 4421
59d6ffb2 4422 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 4423
4424 /* If this reloc is against an external symbol, we do
4425 not want to fiddle with the addend. Otherwise, we
4426 need to include the symbol value so that it becomes
4427 an addend for the dynamic reloc. */
0f88be7a 4428 if (! relocate)
252b5132
RH		 4429 continue;
4430 }
252b5132
RH		 4431 break;
4432
37e55690 4433 case R_386_TLS_IE:
0e1862bb 4434 if (!bfd_link_executable (info))
37e55690 4435 {
947216bf 4436 Elf_Internal_Rela outrel;
37e55690 4437 asection *sreloc;
37e55690
JJ		 4438
4439 outrel.r_offset = rel->r_offset
4440 + input_section->output_section->vma
4441 + input_section->output_offset;
4442 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4443 sreloc = elf_section_data (input_section)->sreloc;
4444 if (sreloc == NULL)
4445 abort ();
59d6ffb2 4446 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 4447 }
4448 /* Fall through */
4449
13ae64f3 4450 case R_386_TLS_GD:
67a4f2b7
AO		 4451 case R_386_TLS_GOTDESC:
4452 case R_386_TLS_DESC_CALL:
13ae64f3 4453 case R_386_TLS_IE_32:
37e55690 4454 case R_386_TLS_GOTIE:
13ae64f3
JJ		 4455 tls_type = GOT_UNKNOWN;
4456 if (h == NULL && local_got_offsets)
4457 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
4458 else if (h != NULL)
142411ca 4459 tls_type = elf_i386_hash_entry(h)->tls_type;
37e55690
JJ		 4460 if (tls_type == GOT_TLS_IE)
4461 tls_type = GOT_TLS_IE_NEG;
142411ca
L		 4462
4463 if (! elf_i386_tls_transition (info, input_bfd,
4464 input_section, contents,
4465 symtab_hdr, sym_hashes,
4466 &r_type, tls_type, rel,
4c544807 4467 relend, h, r_symndx))
142411ca 4468 return FALSE;
13ae64f3
JJ		 4469
4470 if (r_type == R_386_TLS_LE_32)
4471 {
82e51918 4472 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 4473 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4474 {
142411ca 4475 unsigned int type;
13ae64f3
JJ		 4476 bfd_vma roff;
4477
4478 /* GD->LE transition. */
13ae64f3 4479 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ		 4480 if (type == 0x04)
4481 {
4482 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4483 Change it into:
4484 movl %gs:0, %eax; subl $foo@tpoff, %eax
4485 (6 byte form of subl). */
13ae64f3
JJ		 4486 memcpy (contents + rel->r_offset - 3,
4487 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
142411ca 4488 roff = rel->r_offset + 5;
13ae64f3
JJ		 4489 }
4490 else
4491 {
142411ca
L		 4492 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4493 Change it into:
4494 movl %gs:0, %eax; subl $foo@tpoff, %eax
4495 (6 byte form of subl). */
4496 memcpy (contents + rel->r_offset - 2,
4497 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4498 roff = rel->r_offset + 6;
13ae64f3 4499 }
eb4ff4d6 4500 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 4501 contents + roff);
a3fadc9a 4502 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 4503 rel++;
60f2e42e 4504 wrel++;
13ae64f3
JJ		 4505 continue;
4506 }
67a4f2b7
AO		 4507 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4508 {
4509 /* GDesc -> LE transition.
4510 It's originally something like:
4511 leal x@tlsdesc(%ebx), %eax
4512
4513 leal x@ntpoff, %eax
4514
4515 Registers other than %eax may be set up here. */
4516
142411ca 4517 unsigned int val;
67a4f2b7
AO		 4518 bfd_vma roff;
4519
67a4f2b7 4520 roff = rel->r_offset;
67a4f2b7 4521 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 4522
4523 /* Now modify the instruction as appropriate. */
4524 /* aoliva FIXME: remove the above and xor the byte
4525 below with 0x86. */
4526 bfd_put_8 (output_bfd, val ^ 0x86,
4527 contents + roff - 1);
eb4ff4d6 4528 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 4529 contents + roff);
4530 continue;
4531 }
4532 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4533 {
4534 /* GDesc -> LE transition.
4535 It's originally:
4536 call *(%eax)
4537 Turn it into:
142411ca 4538 xchg %ax,%ax */
67a4f2b7 4539
67a4f2b7 4540 bfd_vma roff;
6bbec505 4541
67a4f2b7 4542 roff = rel->r_offset;
10efb593 4543 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4544 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4545 continue;
4546 }
37e55690 4547 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3 4548 {
142411ca 4549 unsigned int val;
13ae64f3
JJ		 4550
4551 /* IE->LE transition:
37e55690
JJ		 4552 Originally it can be one of:
4553 movl foo, %eax
4554 movl foo, %reg
4555 addl foo, %reg
4556 We change it into:
4557 movl $foo, %eax
4558 movl $foo, %reg
4559 addl $foo, %reg. */
37e55690 4560 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 4561 if (val == 0xa1)
4562 {
4563 /* movl foo, %eax. */
55fd94b0
AM		 4564 bfd_put_8 (output_bfd, 0xb8,
4565 contents + rel->r_offset - 1);
37e55690 4566 }
299bf759 4567 else
37e55690 4568 {
142411ca
L		 4569 unsigned int type;
4570
55fd94b0
AM		 4571 type = bfd_get_8 (input_bfd,
4572 contents + rel->r_offset - 2);
299bf759 4573 switch (type)
26e41594 4574 {
299bf759
L		 4575 case 0x8b:
4576 /* movl */
299bf759
L		 4577 bfd_put_8 (output_bfd, 0xc7,
4578 contents + rel->r_offset - 2);
4579 bfd_put_8 (output_bfd,
4580 0xc0 | ((val >> 3) & 7),
4581 contents + rel->r_offset - 1);
4582 break;
4583 case 0x03:
4584 /* addl */
299bf759
L		 4585 bfd_put_8 (output_bfd, 0x81,
4586 contents + rel->r_offset - 2);
4587 bfd_put_8 (output_bfd,
4588 0xc0 | ((val >> 3) & 7),
4589 contents + rel->r_offset - 1);
4590 break;
4591 default:
4592 BFD_FAIL ();
4593 break;
26e41594 4594 }
37e55690 4595 }
eb4ff4d6 4596 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4597 contents + rel->r_offset);
4598 continue;
4599 }
4600 else
4601 {
4602 unsigned int val, type;
4603
4604 /* {IE_32,GOTIE}->LE transition:
4605 Originally it can be one of:
13ae64f3 4606 subl foo(%reg1), %reg2
13ae64f3 4607 movl foo(%reg1), %reg2
37e55690 4608 addl foo(%reg1), %reg2
13ae64f3
JJ		 4609 We change it into:
4610 subl $foo, %reg2
37e55690
JJ		 4611 movl $foo, %reg2 (6 byte form)
4612 addl $foo, %reg2. */
13ae64f3
JJ		 4613 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4614 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 4615 if (type == 0x8b)
4616 {
4617 /* movl */
13ae64f3
JJ		 4618 bfd_put_8 (output_bfd, 0xc7,
4619 contents + rel->r_offset - 2);
4620 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4621 contents + rel->r_offset - 1);
4622 }
4623 else if (type == 0x2b)
4624 {
4625 /* subl */
13ae64f3
JJ		 4626 bfd_put_8 (output_bfd, 0x81,
4627 contents + rel->r_offset - 2);
4628 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4629 contents + rel->r_offset - 1);
4630 }
37e55690
JJ		 4631 else if (type == 0x03)
4632 {
4633 /* addl */
4634 bfd_put_8 (output_bfd, 0x81,
4635 contents + rel->r_offset - 2);
4636 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4637 contents + rel->r_offset - 1);
4638 }
13ae64f3
JJ		 4639 else
4640 BFD_FAIL ();
37e55690 4641 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
eb4ff4d6 4642 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 4643 contents + rel->r_offset);
4644 else
eb4ff4d6 4645 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 4646 contents + rel->r_offset);
13ae64f3
JJ		 4647 continue;
4648 }
4649 }
4650
6de2ae4a 4651 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4652 abort ();
4653
4654 if (h != NULL)
67a4f2b7
AO		 4655 {
4656 off = h->got.offset;
4657 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4658 }
13ae64f3
JJ		 4659 else
4660 {
4661 if (local_got_offsets == NULL)
4662 abort ();
4663
4664 off = local_got_offsets[r_symndx];
67a4f2b7 4665 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 4666 }
4667
4668 if ((off & 1) != 0)
4669 off &= ~1;
26e41594 4670 else
13ae64f3 4671 {
947216bf 4672 Elf_Internal_Rela outrel;
91d6fa6a 4673 int dr_type;
67a4f2b7 4674 asection *sreloc;
13ae64f3 4675
6de2ae4a 4676 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4677 abort ();
4678
67a4f2b7
AO		 4679 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4680
4681 if (GOT_TLS_GDESC_P (tls_type))
4682 {
59d6ffb2 4683 bfd_byte *loc;
67a4f2b7
AO		 4684 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4685 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 4686 <= htab->elf.sgotplt->size);
4687 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4688 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4689 + offplt
4690 + htab->sgotplt_jump_table_size);
6de2ae4a 4691 sreloc = htab->elf.srelplt;
67a4f2b7 4692 loc = sreloc->contents;
5ae0bfb6
RS		 4693 loc += (htab->next_tls_desc_index++
4694 * sizeof (Elf32_External_Rel));
67a4f2b7 4695 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 4696 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 4697 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4698 if (indx == 0)
4699 {
4700 BFD_ASSERT (! unresolved_reloc);
4701 bfd_put_32 (output_bfd,
eb4ff4d6 4702 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4703 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4704 + htab->sgotplt_jump_table_size + 4);
4705 }
4706 else
4707 {
4708 bfd_put_32 (output_bfd, 0,
6de2ae4a 4709 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4710 + htab->sgotplt_jump_table_size + 4);
4711 }
4712 }
4713
6de2ae4a 4714 sreloc = htab->elf.srelgot;
67a4f2b7 4715
6de2ae4a
L		 4716 outrel.r_offset = (htab->elf.sgot->output_section->vma
4717 + htab->elf.sgot->output_offset + off);
13ae64f3 4718
67a4f2b7 4719 if (GOT_TLS_GD_P (tls_type))
13ae64f3 4720 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 4721 else if (GOT_TLS_GDESC_P (tls_type))
4722 goto dr_done;
37e55690
JJ		 4723 else if (tls_type == GOT_TLS_IE_POS)
4724 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 4725 else
4726 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 4727
37e55690 4728 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6
L		 4729 bfd_put_32 (output_bfd,
4730 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4731 htab->elf.sgot->contents + off);
37e55690 4732 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 4733 bfd_put_32 (output_bfd,
eb4ff4d6 4734 elf_i386_dtpoff_base (info) - relocation,
6de2ae4a 4735 htab->elf.sgot->contents + off);
67a4f2b7 4736 else if (dr_type != R_386_TLS_DESC)
c366c25e 4737 bfd_put_32 (output_bfd, 0,
6de2ae4a 4738 htab->elf.sgot->contents + off);
13ae64f3 4739 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 4740
59d6ffb2 4741 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 4742
67a4f2b7 4743 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 4744 {
4745 if (indx == 0)
4746 {
82e51918 4747 BFD_ASSERT (! unresolved_reloc);
13ae64f3 4748 bfd_put_32 (output_bfd,
eb4ff4d6 4749 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4750 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4751 }
4752 else
4753 {
4754 bfd_put_32 (output_bfd, 0,
6de2ae4a 4755 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4756 outrel.r_info = ELF32_R_INFO (indx,
4757 R_386_TLS_DTPOFF32);
4758 outrel.r_offset += 4;
59d6ffb2 4759 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 4760 }
4761 }
37e55690
JJ		 4762 else if (tls_type == GOT_TLS_IE_BOTH)
4763 {
4764 bfd_put_32 (output_bfd,
eb4ff4d6
L		 4765 (indx == 0
4766 ? relocation - elf_i386_dtpoff_base (info)
4767 : 0),
6de2ae4a 4768 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 4769 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4770 outrel.r_offset += 4;
59d6ffb2 4771 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 4772 }
13ae64f3 4773
67a4f2b7 4774 dr_done:
13ae64f3
JJ		 4775 if (h != NULL)
4776 h->got.offset |= 1;
4777 else
4778 local_got_offsets[r_symndx] |= 1;
4779 }
4780
67a4f2b7
AO		 4781 if (off >= (bfd_vma) -2
4782 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 4783 abort ();
67a4f2b7
AO		 4784 if (r_type == R_386_TLS_GOTDESC
4785 || r_type == R_386_TLS_DESC_CALL)
4786 {
4787 relocation = htab->sgotplt_jump_table_size + offplt;
4788 unresolved_reloc = FALSE;
4789 }
4790 else if (r_type == ELF32_R_TYPE (rel->r_info))
13ae64f3 4791 {
6de2ae4a
L		 4792 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4793 + htab->elf.sgotplt->output_offset;
4794 relocation = htab->elf.sgot->output_section->vma
4795 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 4796 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4797 && tls_type == GOT_TLS_IE_BOTH)
4798 relocation += 4;
4799 if (r_type == R_386_TLS_IE)
8c37241b 4800 relocation += g_o_t;
b34976b6 4801 unresolved_reloc = FALSE;
13ae64f3 4802 }
67a4f2b7 4803 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
13ae64f3
JJ		 4804 {
4805 unsigned int val, type;
4806 bfd_vma roff;
4807
4808 /* GD->IE transition. */
13ae64f3 4809 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ		 4810 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4811 if (type == 0x04)
4812 {
4813 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4814 Change it into:
4815 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3 4816 val >>= 3;
142411ca 4817 roff = rel->r_offset - 3;
13ae64f3
JJ		 4818 }
4819 else
4820 {
4821 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4822 Change it into:
4823 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 4824 roff = rel->r_offset - 2;
4825 }
4826 memcpy (contents + roff,
4827 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4828 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 4829 /* If foo is used only with foo@gotntpoff(%reg) and
4830 foo@indntpoff, but not with foo@gottpoff(%reg), change
4831 subl $foo@gottpoff(%reg), %eax
4832 into:
4833 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 4834 if (tls_type == GOT_TLS_IE_POS)
4835 contents[roff + 6] = 0x03;
8c37241b 4836 bfd_put_32 (output_bfd,
6de2ae4a
L		 4837 htab->elf.sgot->output_section->vma
4838 + htab->elf.sgot->output_offset + off
4839 - htab->elf.sgotplt->output_section->vma
4840 - htab->elf.sgotplt->output_offset,
13ae64f3
JJ		 4841 contents + roff + 8);
4842 /* Skip R_386_PLT32. */
4843 rel++;
60f2e42e 4844 wrel++;
13ae64f3
JJ		 4845 continue;
4846 }
67a4f2b7
AO		 4847 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4848 {
4849 /* GDesc -> IE transition.
4850 It's originally something like:
4851 leal x@tlsdesc(%ebx), %eax
4852
4853 Change it to:
142411ca 4854 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 4855 or:
4856 movl x@gottpoff(%ebx), %eax # before negl %eax
4857
4858 Registers other than %eax may be set up here. */
4859
67a4f2b7
AO		 4860 bfd_vma roff;
4861
4862 /* First, make sure it's a leal adding ebx to a 32-bit
4863 offset into any register, although it's probably
4864 almost always going to be eax. */
4865 roff = rel->r_offset;
67a4f2b7
AO		 4866
4867 /* Now modify the instruction as appropriate. */
4868 /* To turn a leal into a movl in the form we use it, it
4869 suffices to change the first byte from 0x8d to 0x8b.
4870 aoliva FIXME: should we decide to keep the leal, all
4871 we have to do is remove the statement below, and
4872 adjust the relaxation of R_386_TLS_DESC_CALL. */
4873 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4874
4875 if (tls_type == GOT_TLS_IE_BOTH)
4876 off += 4;
4877
4878 bfd_put_32 (output_bfd,
6de2ae4a
L		 4879 htab->elf.sgot->output_section->vma
4880 + htab->elf.sgot->output_offset + off
4881 - htab->elf.sgotplt->output_section->vma
4882 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 4883 contents + roff);
4884 continue;
4885 }
4886 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4887 {
4888 /* GDesc -> IE transition.
4889 It's originally:
4890 call *(%eax)
4891
4892 Change it to:
142411ca 4893 xchg %ax,%ax
67a4f2b7
AO		 4894 or
4895 negl %eax
4896 depending on how we transformed the TLS_GOTDESC above.
4897 */
4898
67a4f2b7
AO		 4899 bfd_vma roff;
4900
67a4f2b7 4901 roff = rel->r_offset;
67a4f2b7
AO		 4902
4903 /* Now modify the instruction as appropriate. */
4904 if (tls_type != GOT_TLS_IE_NEG)
4905 {
10efb593
L		 4906 /* xchg %ax,%ax */
4907 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4908 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4909 }
4910 else
4911 {
4912 /* negl %eax */
4913 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4914 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4915 }
4916
4917 continue;
4918 }
4919 else
4920 BFD_ASSERT (FALSE);
13ae64f3
JJ		 4921 break;
4922
4923 case R_386_TLS_LDM:
142411ca
L		 4924 if (! elf_i386_tls_transition (info, input_bfd,
4925 input_section, contents,
4926 symtab_hdr, sym_hashes,
4927 &r_type, GOT_UNKNOWN, rel,
4c544807 4928 relend, h, r_symndx))
142411ca 4929 return FALSE;
13ae64f3 4930
142411ca
L		 4931 if (r_type != R_386_TLS_LDM)
4932 {
13ae64f3 4933 /* LD->LE transition:
13ae64f3
JJ		 4934 leal foo(%reg), %eax; call ___tls_get_addr.
4935 We change it into:
4936 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
142411ca 4937 BFD_ASSERT (r_type == R_386_TLS_LE_32);
13ae64f3
JJ		 4938 memcpy (contents + rel->r_offset - 2,
4939 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 4940 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3 4941 rel++;
60f2e42e 4942 wrel++;
13ae64f3
JJ		 4943 continue;
4944 }
4945
6de2ae4a 4946 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4947 abort ();
4948
4949 off = htab->tls_ldm_got.offset;
4950 if (off & 1)
4951 off &= ~1;
4952 else
4953 {
947216bf 4954 Elf_Internal_Rela outrel;
13ae64f3 4955
6de2ae4a 4956 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4957 abort ();
4958
6de2ae4a
L		 4959 outrel.r_offset = (htab->elf.sgot->output_section->vma
4960 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 4961
4962 bfd_put_32 (output_bfd, 0,
6de2ae4a 4963 htab->elf.sgot->contents + off);
13ae64f3 4964 bfd_put_32 (output_bfd, 0,
6de2ae4a 4965 htab->elf.sgot->contents + off + 4);
13ae64f3 4966 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 4967 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
13ae64f3
JJ		 4968 htab->tls_ldm_got.offset |= 1;
4969 }
6de2ae4a
L		 4970 relocation = htab->elf.sgot->output_section->vma
4971 + htab->elf.sgot->output_offset + off
4972 - htab->elf.sgotplt->output_section->vma
4973 - htab->elf.sgotplt->output_offset;
b34976b6 4974 unresolved_reloc = FALSE;
13ae64f3
JJ		 4975 break;
4976
4977 case R_386_TLS_LDO_32:
0e1862bb
L		 4978 if (!bfd_link_executable (info)
4979 || (input_section->flags & SEC_CODE) == 0)
eb4ff4d6 4980 relocation -= elf_i386_dtpoff_base (info);
13ae64f3
JJ		 4981 else
4982 /* When converting LDO to LE, we must negate. */
eb4ff4d6 4983 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4984 break;
4985
4986 case R_386_TLS_LE_32:
13ae64f3 4987 case R_386_TLS_LE:
0e1862bb 4988 if (!bfd_link_executable (info))
37e55690 4989 {
947216bf 4990 Elf_Internal_Rela outrel;
37e55690 4991 asection *sreloc;
37e55690
JJ		 4992
4993 outrel.r_offset = rel->r_offset
4994 + input_section->output_section->vma
4995 + input_section->output_offset;
4996 if (h != NULL && h->dynindx != -1)
4997 indx = h->dynindx;
4998 else
4999 indx = 0;
5000 if (r_type == R_386_TLS_LE_32)
5001 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
5002 else
5003 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
5004 sreloc = elf_section_data (input_section)->sreloc;
5005 if (sreloc == NULL)
5006 abort ();
59d6ffb2 5007 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 5008 if (indx)
5009 continue;
5010 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 5011 relocation = elf_i386_dtpoff_base (info) - relocation;
37e55690 5012 else
eb4ff4d6 5013 relocation -= elf_i386_dtpoff_base (info);
37e55690
JJ		 5014 }
5015 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 5016 relocation = elf_i386_tpoff (info, relocation);
37e55690 5017 else
eb4ff4d6 5018 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 5019 break;
5020
252b5132
RH		 5021 default:
5022 break;
5023 }
5024
239e1f3a
AM		 5025 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5026 because such sections are not SEC_ALLOC and thus ld.so will
5027 not process them. */
8c694914 5028 if (unresolved_reloc
239e1f3a 5029 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 5030 && h->def_dynamic)
5031 && _bfd_elf_section_offset (output_bfd, info, input_section,
5032 rel->r_offset) != (bfd_vma) -1)
6a30718d
JJ		 5033 {
5034 (*_bfd_error_handler)
843fe662 5035 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 5036 input_bfd,
5037 input_section,
6a30718d 5038 (long) rel->r_offset,
843fe662 5039 howto->name,
6a30718d 5040 h->root.root.string);
b34976b6 5041 return FALSE;
6a30718d 5042 }
83be169b 5043
cbe950e9 5044do_relocation:
252b5132
RH		 5045 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5046 contents, rel->r_offset,
55fd94b0 5047 relocation, 0);
252b5132 5048
62d78908 5049check_relocation_error:
cf5c0c5b 5050 if (r != bfd_reloc_ok)
252b5132 5051 {
cf5c0c5b 5052 const char *name;
ffb2e45b 5053
cf5c0c5b
AM		 5054 if (h != NULL)
5055 name = h->root.root.string;
5056 else
5057 {
5058 name = bfd_elf_string_from_elf_section (input_bfd,
5059 symtab_hdr->sh_link,
5060 sym->st_name);
5061 if (name == NULL)
b34976b6 5062 return FALSE;
cf5c0c5b
AM		 5063 if (*name == '\0')
5064 name = bfd_section_name (input_bfd, sec);
5065 }
ffb2e45b 5066
cf5c0c5b
AM		 5067 if (r == bfd_reloc_overflow)
5068 {
cf5c0c5b 5069 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 5070 (info, (h ? &h->root : NULL), name, howto->name,
5071 (bfd_vma) 0, input_bfd, input_section,
5072 rel->r_offset)))
b34976b6 5073 return FALSE;
cf5c0c5b
AM		 5074 }
5075 else
5076 {
5077 (*_bfd_error_handler)
d003868e
AM		 5078 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5079 input_bfd, input_section,
cf5c0c5b 5080 (long) rel->r_offset, name, (int) r);
b34976b6 5081 return FALSE;
cf5c0c5b 5082 }
252b5132 5083 }
60f2e42e
L		 5084
5085 if (wrel != rel)
5086 *wrel = *rel;
5087 }
5088
5089 if (wrel != rel)
5090 {
5091 Elf_Internal_Shdr *rel_hdr;
5092 size_t deleted = rel - wrel;
5093
5094 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5095 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5096 if (rel_hdr->sh_size == 0)
5097 {
5098 /* It is too late to remove an empty reloc section. Leave
5099 one NONE reloc.
5100 ??? What is wrong with an empty section??? */
5101 rel_hdr->sh_size = rel_hdr->sh_entsize;
5102 deleted -= 1;
5103 }
5104 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5105 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5106 input_section->reloc_count -= deleted;
252b5132
RH		 5107 }
5108
b34976b6 5109 return TRUE;
252b5132
RH		 5110}
5111
5112/* Finish up dynamic symbol handling. We set the contents of various
5113 dynamic sections here. */
5114
b34976b6 5115static bfd_boolean
55fd94b0
AM		 5116elf_i386_finish_dynamic_symbol (bfd *output_bfd,
5117 struct bfd_link_info *info,
5118 struct elf_link_hash_entry *h,
5119 Elf_Internal_Sym *sym)
252b5132 5120{
6725bdbf 5121 struct elf_i386_link_hash_table *htab;
25e762b9
RM		 5122 unsigned plt_entry_size;
5123 const struct elf_i386_backend_data *abed;
dd7e64d4 5124 struct elf_i386_link_hash_entry *eh;
aec6b87e 5125 bfd_boolean local_undefweak;
252b5132 5126
6725bdbf 5127 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 5128 if (htab == NULL)
5129 return FALSE;
252b5132 5130
25e762b9
RM		 5131 abed = get_elf_i386_backend_data (output_bfd);
5132 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
5133
dd7e64d4
L		 5134 eh = (struct elf_i386_link_hash_entry *) h;
5135
aec6b87e
L		 5136 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5137 resolved undefined weak symbols in executable so that their
5138 references have value 0 at run-time. */
5139 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
5140
252b5132
RH		 5141 if (h->plt.offset != (bfd_vma) -1)
5142 {
252b5132
RH		 5143 bfd_vma plt_index;
5144 bfd_vma got_offset;
947216bf
AM		 5145 Elf_Internal_Rela rel;
5146 bfd_byte *loc;
cbe950e9
L		 5147 asection *plt, *gotplt, *relplt;
5148
5149 /* When building a static executable, use .iplt, .igot.plt and
5150 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 5151 if (htab->elf.splt != NULL)
cbe950e9 5152 {
6de2ae4a
L		 5153 plt = htab->elf.splt;
5154 gotplt = htab->elf.sgotplt;
5155 relplt = htab->elf.srelplt;
cbe950e9
L		 5156 }
5157 else
5158 {
6de2ae4a
L		 5159 plt = htab->elf.iplt;
5160 gotplt = htab->elf.igotplt;
5161 relplt = htab->elf.irelplt;
cbe950e9 5162 }
252b5132
RH		 5163
5164 /* This symbol has an entry in the procedure linkage table. Set
5165 it up. */
5166
cbe950e9 5167 if ((h->dynindx == -1
aec6b87e 5168 && !local_undefweak
0e1862bb 5169 && !((h->forced_local || bfd_link_executable (info))
cbe950e9
L		 5170 && h->def_regular
5171 && h->type == STT_GNU_IFUNC))
5172 || plt == NULL
5173 || gotplt == NULL
5174 || relplt == NULL)
cec7f46a 5175 abort ();
252b5132
RH		 5176
5177 /* Get the index in the procedure linkage table which
5178 corresponds to this symbol. This is the index of this symbol
5179 in all the symbols for which we are making plt entries. The
cbe950e9 5180 first entry in the procedure linkage table is reserved.
252b5132 5181
cbe950e9 5182 Get the offset into the .got table of the entry that
252b5132 5183 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 5184 The first three are reserved.
6bbec505 5185
cbe950e9
L		 5186 For static executables, we don't reserve anything. */
5187
6de2ae4a 5188 if (plt == htab->elf.splt)
cbe950e9 5189 {
e1f98742
L		 5190 got_offset = h->plt.offset / plt_entry_size - 1;
5191 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 5192 }
5193 else
5194 {
e1f98742
L		 5195 got_offset = h->plt.offset / plt_entry_size;
5196 got_offset = got_offset * 4;
cbe950e9 5197 }
252b5132
RH		 5198
5199 /* Fill in the entry in the procedure linkage table. */
0e1862bb 5200 if (! bfd_link_pic (info))
252b5132 5201 {
25e762b9
RM		 5202 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
5203 abed->plt->plt_entry_size);
252b5132 5204 bfd_put_32 (output_bfd,
cbe950e9
L		 5205 (gotplt->output_section->vma
5206 + gotplt->output_offset
252b5132 5207 + got_offset),
25e762b9
RM		 5208 plt->contents + h->plt.offset
5209 + abed->plt->plt_got_offset);
eac338cf 5210
25e762b9 5211 if (abed->is_vxworks)
eac338cf
PB		 5212 {
5213 int s, k, reloc_index;
5214
5215 /* Create the R_386_32 relocation referencing the GOT
5216 for this PLT entry. */
5217
5218 /* S: Current slot number (zero-based). */
25e762b9
RM		 5219 s = ((h->plt.offset - abed->plt->plt_entry_size)
5220 / abed->plt->plt_entry_size);
eac338cf 5221 /* K: Number of relocations for PLTResolve. */
0e1862bb 5222 if (bfd_link_pic (info))
eac338cf
PB		 5223 k = PLTRESOLVE_RELOCS_SHLIB;
5224 else
5225 k = PLTRESOLVE_RELOCS;
5226 /* Skip the PLTresolve relocations, and the relocations for
5227 the other PLT slots. */
5228 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
5229 loc = (htab->srelplt2->contents + reloc_index
5230 * sizeof (Elf32_External_Rel));
5231
6de2ae4a
L		 5232 rel.r_offset = (htab->elf.splt->output_section->vma
5233 + htab->elf.splt->output_offset
eac338cf 5234 + h->plt.offset + 2),
7325306f 5235 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 5236 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5237
5238 /* Create the R_386_32 relocation referencing the beginning of
5239 the PLT for this GOT entry. */
6de2ae4a
L		 5240 rel.r_offset = (htab->elf.sgotplt->output_section->vma
5241 + htab->elf.sgotplt->output_offset
eac338cf 5242 + got_offset);
7325306f 5243 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 5244 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 5245 loc + sizeof (Elf32_External_Rel));
eac338cf 5246 }
252b5132
RH		 5247 }
5248 else
5249 {
25e762b9
RM		 5250 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
5251 abed->plt->plt_entry_size);
252b5132 5252 bfd_put_32 (output_bfd, got_offset,
25e762b9
RM		 5253 plt->contents + h->plt.offset
5254 + abed->plt->plt_got_offset);
252b5132
RH		 5255 }
5256
aec6b87e
L		 5257 /* Fill in the entry in the global offset table. Leave the entry
5258 as zero for undefined weak symbol in PIE. No PLT relocation
5259 against undefined weak symbol in PIE. */
5260 if (!local_undefweak)
cbe950e9 5261 {
cbe950e9 5262 bfd_put_32 (output_bfd,
aec6b87e
L		 5263 (plt->output_section->vma
5264 + plt->output_offset
5265 + h->plt.offset
5266 + abed->plt->plt_lazy_offset),
cbe950e9 5267 gotplt->contents + got_offset);
252b5132 5268
aec6b87e
L		 5269 /* Fill in the entry in the .rel.plt section. */
5270 rel.r_offset = (gotplt->output_section->vma
5271 + gotplt->output_offset
5272 + got_offset);
5273 if (h->dynindx == -1
5274 || ((bfd_link_executable (info)
5275 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5276 && h->def_regular
5277 && h->type == STT_GNU_IFUNC))
5278 {
5279 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5280 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5281 in the .got.plt section. */
5282 bfd_put_32 (output_bfd,
5283 (h->root.u.def.value
5284 + h->root.u.def.section->output_section->vma
5285 + h->root.u.def.section->output_offset),
5286 gotplt->contents + got_offset);
5287 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5288 /* R_386_IRELATIVE comes last. */
5289 plt_index = htab->next_irelative_index--;
5290 }
5291 else
5292 {
5293 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
5294 plt_index = htab->next_jump_slot_index++;
5295 }
5296
5297 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
5298 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5299
5300 /* Don't fill PLT entry for static executables. */
5301 if (plt == htab->elf.splt)
5302 {
5303 bfd_put_32 (output_bfd,
5304 plt_index * sizeof (Elf32_External_Rel),
5305 plt->contents + h->plt.offset
5306 + abed->plt->plt_reloc_offset);
5307 bfd_put_32 (output_bfd, - (h->plt.offset
5308 + abed->plt->plt_plt_offset + 4),
5309 plt->contents + h->plt.offset
5310 + abed->plt->plt_plt_offset);
5311 }
e1f98742 5312 }
dd7e64d4
L		 5313 }
5314 else if (eh->plt_got.offset != (bfd_vma) -1)
5315 {
5316 bfd_vma got_offset, plt_offset;
5317 asection *plt, *got, *gotplt;
5318 const bfd_byte *got_plt_entry;
5319
5320 /* Offset of displacement of the indirect jump. */
5321 bfd_vma plt_got_offset = 2;
e1f98742 5322
dd7e64d4
L		 5323 /* Set the entry in the GOT procedure linkage table. */
5324 plt = htab->plt_got;
5325 got = htab->elf.sgot;
5326 gotplt = htab->elf.sgotplt;
5327 got_offset = h->got.offset;
5328
5329 if (got_offset == (bfd_vma) -1
5330 || plt == NULL
5331 || got == NULL
5332 || gotplt == NULL)
5333 abort ();
5334
5335 /* Fill in the entry in the GOT procedure linkage table. */
0e1862bb 5336 if (! bfd_link_pic (info))
252b5132 5337 {
dd7e64d4
L		 5338 got_plt_entry = elf_i386_got_plt_entry;
5339 got_offset += got->output_section->vma + got->output_offset;
252b5132 5340 }
dd7e64d4
L		 5341 else
5342 {
5343 got_plt_entry = elf_i386_pic_got_plt_entry;
5344 got_offset += (got->output_section->vma
5345 + got->output_offset
5346 - gotplt->output_section->vma
5347 - gotplt->output_offset);
5348 }
5349
5350 plt_offset = eh->plt_got.offset;
5351 memcpy (plt->contents + plt_offset, got_plt_entry,
5352 sizeof (elf_i386_got_plt_entry));
5353 bfd_put_32 (output_bfd, got_offset,
5354 plt->contents + plt_offset + plt_got_offset);
5355 }
5356
aec6b87e
L		 5357 if (!local_undefweak
5358 && !h->def_regular
dd7e64d4
L		 5359 && (h->plt.offset != (bfd_vma) -1
5360 || eh->plt_got.offset != (bfd_vma) -1))
5361 {
5362 /* Mark the symbol as undefined, rather than as defined in
5363 the .plt section. Leave the value if there were any
5364 relocations where pointer equality matters (this is a clue
5365 for the dynamic linker, to make function pointer
5366 comparisons work between an application and shared
5367 library), otherwise set it to zero. If a function is only
5368 called from a binary, there is no need to slow down
5369 shared libraries because of that. */
5370 sym->st_shndx = SHN_UNDEF;
5371 if (!h->pointer_equality_needed)
5372 sym->st_value = 0;
252b5132
RH		 5373 }
5374
aec6b87e
L		 5375 /* Don't generate dynamic GOT relocation against undefined weak
5376 symbol in executable. */
13ae64f3 5377 if (h->got.offset != (bfd_vma) -1
67a4f2b7 5378 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
aec6b87e
L		 5379 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
5380 && !local_undefweak)
252b5132 5381 {
947216bf 5382 Elf_Internal_Rela rel;
252b5132
RH		 5383
5384 /* This symbol has an entry in the global offset table. Set it
5385 up. */
5386
6de2ae4a 5387 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 5388 abort ();
252b5132 5389
6de2ae4a
L		 5390 rel.r_offset = (htab->elf.sgot->output_section->vma
5391 + htab->elf.sgot->output_offset
dc810e39 5392 + (h->got.offset & ~(bfd_vma) 1));
252b5132 5393
dd5724d5
AM		 5394 /* If this is a static link, or it is a -Bsymbolic link and the
5395 symbol is defined locally or was forced to be local because
5396 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 5397 The entry in the global offset table will already have been
5398 initialized in the relocate_section function. */
710ab287 5399 if (h->def_regular
0018b0a3
L		 5400 && h->type == STT_GNU_IFUNC)
5401 {
0e1862bb 5402 if (bfd_link_pic (info))
710ab287
L		 5403 {
5404 /* Generate R_386_GLOB_DAT. */
5405 goto do_glob_dat;
5406 }
5407 else
5408 {
cd2b2c10
L		 5409 asection *plt;
5410
710ab287
L		 5411 if (!h->pointer_equality_needed)
5412 abort ();
5413
5414 /* For non-shared object, we can't use .got.plt, which
5415 contains the real function addres if we need pointer
5416 equality. We load the GOT entry with the PLT entry. */
cd2b2c10 5417 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L		 5418 bfd_put_32 (output_bfd,
5419 (plt->output_section->vma
5420 + plt->output_offset + h->plt.offset),
6de2ae4a 5421 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 5422 return TRUE;
5423 }
0018b0a3 5424 }
0e1862bb 5425 else if (bfd_link_pic (info)
0018b0a3 5426 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 5427 {
6725bdbf 5428 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 5429 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
5430 }
252b5132
RH		 5431 else
5432 {
dd5724d5 5433 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 5434do_glob_dat:
6725bdbf 5435 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 5436 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 5437 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
5438 }
5439
59d6ffb2 5440 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
252b5132
RH		 5441 }
5442
f5385ebf 5443 if (h->needs_copy)
252b5132 5444 {
947216bf 5445 Elf_Internal_Rela rel;
252b5132
RH		 5446
5447 /* This symbol needs a copy reloc. Set it up. */
5448
ffb2e45b
AM		 5449 if (h->dynindx == -1
5450 || (h->root.type != bfd_link_hash_defined
5451 && h->root.type != bfd_link_hash_defweak)
5452 || htab->srelbss == NULL)
5453 abort ();
252b5132
RH		 5454
5455 rel.r_offset = (h->root.u.def.value
5456 + h->root.u.def.section->output_section->vma
5457 + h->root.u.def.section->output_offset);
5458 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
59d6ffb2 5459 elf_append_rel (output_bfd, htab->srelbss, &rel);
252b5132
RH		 5460 }
5461
b34976b6 5462 return TRUE;
252b5132
RH		 5463}
5464
c25bc9fc
L		 5465/* Finish up local dynamic symbol handling. We set the contents of
5466 various dynamic sections here. */
5467
5468static bfd_boolean
5469elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5470{
5471 struct elf_link_hash_entry *h
5472 = (struct elf_link_hash_entry *) *slot;
5473 struct bfd_link_info *info
23209a78 5474 = (struct bfd_link_info *) inf;
c25bc9fc
L		 5475
5476 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5477 h, NULL);
5478}
5479
aec6b87e
L		 5480/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5481 here since undefined weak symbol may not be dynamic and may not be
5482 called for elf_i386_finish_dynamic_symbol. */
5483
5484static bfd_boolean
5485elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5486 void *inf)
5487{
5488 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5489 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5490
5491 if (h->root.type != bfd_link_hash_undefweak
5492 || h->dynindx != -1)
5493 return TRUE;
5494
5495 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5496 info, h, NULL);
5497}
5498
38701953
AM		 5499/* Used to decide how to sort relocs in an optimal manner for the
5500 dynamic linker, before writing them out. */
5501
5502static enum elf_reloc_type_class
cae1fbbb 5503elf_i386_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 5504 const asection *rel_sec ATTRIBUTE_UNUSED,
5505 const Elf_Internal_Rela *rela)
38701953 5506{
cae1fbbb
L		 5507 bfd *abfd = info->output_bfd;
5508 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5509 struct elf_link_hash_table *htab = elf_hash_table (info);
cae1fbbb 5510
d9e3b590
L		 5511 if (htab->dynsym != NULL
5512 && htab->dynsym->contents != NULL)
5513 {
5514 /* Check relocation against STT_GNU_IFUNC symbol if there are
5515 dynamic symbols. */
5516 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5517 Elf_Internal_Sym sym;
5518 if (!bed->s->swap_symbol_in (abfd,
5519 (htab->dynsym->contents
5520 + r_symndx * sizeof (Elf32_External_Sym)),
5521 0, &sym))
5522 abort ();
5523
5524 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5525 return reloc_class_ifunc;
5526 }
cae1fbbb 5527
55fd94b0 5528 switch (ELF32_R_TYPE (rela->r_info))
38701953
AM		 5529 {
5530 case R_386_RELATIVE:
5531 return reloc_class_relative;
5532 case R_386_JUMP_SLOT:
5533 return reloc_class_plt;
5534 case R_386_COPY:
5535 return reloc_class_copy;
5536 default:
5537 return reloc_class_normal;
5538 }
5539}
5540
252b5132
RH		 5541/* Finish up the dynamic sections. */
5542
b34976b6 5543static bfd_boolean
55fd94b0
AM		 5544elf_i386_finish_dynamic_sections (bfd *output_bfd,
5545 struct bfd_link_info *info)
252b5132 5546{
6725bdbf 5547 struct elf_i386_link_hash_table *htab;
252b5132 5548 bfd *dynobj;
252b5132 5549 asection *sdyn;
25e762b9 5550 const struct elf_i386_backend_data *abed;
252b5132 5551
6725bdbf 5552 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 5553 if (htab == NULL)
5554 return FALSE;
5555
ebe50bae 5556 dynobj = htab->elf.dynobj;
3d4d4302 5557 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
25e762b9 5558 abed = get_elf_i386_backend_data (output_bfd);
252b5132 5559
ebe50bae 5560 if (htab->elf.dynamic_sections_created)
252b5132 5561 {
252b5132
RH		 5562 Elf32_External_Dyn *dyncon, *dynconend;
5563
6de2ae4a 5564 if (sdyn == NULL || htab->elf.sgot == NULL)
ffb2e45b 5565 abort ();
252b5132
RH		 5566
5567 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 5568 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 5569 for (; dyncon < dynconend; dyncon++)
5570 {
5571 Elf_Internal_Dyn dyn;
51b64d56 5572 asection *s;
252b5132
RH		 5573
5574 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5575
5576 switch (dyn.d_tag)
5577 {
5578 default:
25e762b9
RM		 5579 if (abed->is_vxworks
5580 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7a2b07ff 5581 break;
0ac8d2ca 5582 continue;
252b5132
RH		 5583
5584 case DT_PLTGOT:
6de2ae4a 5585 s = htab->elf.sgotplt;
8c37241b 5586 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 5587 break;
5588
252b5132 5589 case DT_JMPREL:
6de2ae4a 5590 s = htab->elf.srelplt;
6348e046 5591 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 5592 break;
5593
5594 case DT_PLTRELSZ:
6de2ae4a 5595 s = htab->elf.srelplt;
eea6121a 5596 dyn.d_un.d_val = s->size;
252b5132
RH		 5597 break;
5598
5599 case DT_RELSZ:
5600 /* My reading of the SVR4 ABI indicates that the
5601 procedure linkage table relocs (DT_JMPREL) should be
5602 included in the overall relocs (DT_REL). This is
5603 what Solaris does. However, UnixWare can not handle
5604 that case. Therefore, we override the DT_RELSZ entry
6348e046 5605 here to make it not include the JMPREL relocs. */
6de2ae4a 5606 s = htab->elf.srelplt;
6348e046
AM		 5607 if (s == NULL)
5608 continue;
eea6121a 5609 dyn.d_un.d_val -= s->size;
6348e046
AM		 5610 break;
5611
5612 case DT_REL:
5613 /* We may not be using the standard ELF linker script.
5614 If .rel.plt is the first .rel section, we adjust
5615 DT_REL to not include it. */
6de2ae4a 5616 s = htab->elf.srelplt;
6348e046
AM		 5617 if (s == NULL)
5618 continue;
5619 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5620 continue;
eea6121a 5621 dyn.d_un.d_ptr += s->size;
252b5132
RH		 5622 break;
5623 }
0ac8d2ca
AM		 5624
5625 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 5626 }
5627
5628 /* Fill in the first entry in the procedure linkage table. */
6de2ae4a 5629 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132 5630 {
0e1862bb 5631 if (bfd_link_pic (info))
eac338cf 5632 {
25e762b9
RM		 5633 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5634 abed->plt->plt0_entry_size);
5635 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5636 abed->plt0_pad_byte,
5637 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
eac338cf 5638 }
252b5132
RH		 5639 else
5640 {
25e762b9
RM		 5641 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5642 abed->plt->plt0_entry_size);
5643 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5644 abed->plt0_pad_byte,
5645 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
252b5132 5646 bfd_put_32 (output_bfd,
6de2ae4a
L		 5647 (htab->elf.sgotplt->output_section->vma
5648 + htab->elf.sgotplt->output_offset
6725bdbf 5649 + 4),
25e762b9
RM		 5650 htab->elf.splt->contents
5651 + abed->plt->plt0_got1_offset);
252b5132 5652 bfd_put_32 (output_bfd,
6de2ae4a
L		 5653 (htab->elf.sgotplt->output_section->vma
5654 + htab->elf.sgotplt->output_offset
6725bdbf 5655 + 8),
25e762b9
RM		 5656 htab->elf.splt->contents
5657 + abed->plt->plt0_got2_offset);
eac338cf 5658
25e762b9 5659 if (abed->is_vxworks)
eac338cf
PB		 5660 {
5661 Elf_Internal_Rela rel;
7325306f 5662
eac338cf
PB		 5663 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5664 On IA32 we use REL relocations so the addend goes in
5665 the PLT directly. */
6de2ae4a
L		 5666 rel.r_offset = (htab->elf.splt->output_section->vma
5667 + htab->elf.splt->output_offset
25e762b9 5668 + abed->plt->plt0_got1_offset);
7325306f 5669 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 5670 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5671 htab->srelplt2->contents);
5672 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
6de2ae4a
L		 5673 rel.r_offset = (htab->elf.splt->output_section->vma
5674 + htab->elf.splt->output_offset
25e762b9 5675 + abed->plt->plt0_got2_offset);
7325306f 5676 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 5677 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5678 htab->srelplt2->contents +
5679 sizeof (Elf32_External_Rel));
5680 }
252b5132
RH		 5681 }
5682
5683 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5684 really seem like the right value. */
6de2ae4a 5685 elf_section_data (htab->elf.splt->output_section)
6725bdbf 5686 ->this_hdr.sh_entsize = 4;
eac338cf
PB		 5687
5688 /* Correct the .rel.plt.unloaded relocations. */
0e1862bb 5689 if (abed->is_vxworks && !bfd_link_pic (info))
eac338cf 5690 {
25e762b9
RM		 5691 int num_plts = (htab->elf.splt->size
5692 / abed->plt->plt_entry_size) - 1;
4c9b0de6 5693 unsigned char *p;
eac338cf
PB		 5694
5695 p = htab->srelplt2->contents;
0e1862bb 5696 if (bfd_link_pic (info))
eac338cf
PB		 5697 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5698 else
5699 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5700
5701 for (; num_plts; num_plts--)
5702 {
5703 Elf_Internal_Rela rel;
5704 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 5705 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 5706 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5707 p += sizeof (Elf32_External_Rel);
5708
5709 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 5710 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf
PB		 5711 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5712 p += sizeof (Elf32_External_Rel);
5713 }
5714 }
252b5132
RH		 5715 }
5716 }
5717
6de2ae4a 5718 if (htab->elf.sgotplt)
252b5132 5719 {
56d4289c
L		 5720 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5721 {
5722 (*_bfd_error_handler)
5723 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5724 return FALSE;
5725 }
5726
12d0ee4a 5727 /* Fill in the first three entries in the global offset table. */
6de2ae4a 5728 if (htab->elf.sgotplt->size > 0)
12d0ee4a
AM		 5729 {
5730 bfd_put_32 (output_bfd,
55fd94b0 5731 (sdyn == NULL ? 0
12d0ee4a 5732 : sdyn->output_section->vma + sdyn->output_offset),
6de2ae4a
L		 5733 htab->elf.sgotplt->contents);
5734 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5735 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
12d0ee4a 5736 }
252b5132 5737
6de2ae4a 5738 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
12d0ee4a 5739 }
8c37241b 5740
e41b3a13 5741 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 5742 if (htab->plt_eh_frame != NULL
5743 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 5744 {
5745 if (htab->elf.splt != NULL
5746 && htab->elf.splt->size != 0
5747 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5748 && htab->elf.splt->output_section != NULL
5749 && htab->plt_eh_frame->output_section != NULL)
5750 {
5751 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5752 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5753 + htab->plt_eh_frame->output_offset
5754 + PLT_FDE_START_OFFSET;
5755 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5756 htab->plt_eh_frame->contents
5757 + PLT_FDE_START_OFFSET);
5758 }
5759 if (htab->plt_eh_frame->sec_info_type
dbaa2011 5760 == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 5761 {
5762 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5763 htab->plt_eh_frame,
5764 htab->plt_eh_frame->contents))
5765 return FALSE;
5766 }
5767 }
5768
6de2ae4a
L		 5769 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5770 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
8c37241b 5771
c25bc9fc
L		 5772 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5773 htab_traverse (htab->loc_hash_table,
5774 elf_i386_finish_local_dynamic_symbol,
5775 info);
5776
aec6b87e
L		 5777 /* Fill PLT entries for undefined weak symbols in PIE. */
5778 if (bfd_link_pie (info))
5779 bfd_hash_traverse (&info->hash->table,
5780 elf_i386_pie_finish_undefweak_symbol,
5781 info);
5782
b34976b6 5783 return TRUE;
252b5132
RH		 5784}
5785
3972882e 5786/* Return an array of PLT entry symbol values. */
4c45e5c9 5787
3972882e
L		 5788static bfd_vma *
5789elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5790 asection *relplt)
4c45e5c9 5791{
3972882e
L		 5792 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5793 arelent *p;
5794 long count, i;
5795 bfd_vma *plt_sym_val;
144bed8d 5796 bfd_vma plt_offset;
3972882e
L		 5797 bfd_byte *plt_contents;
5798 const struct elf_i386_backend_data *bed
5799 = get_elf_i386_backend_data (abfd);
5800 Elf_Internal_Shdr *hdr;
5801
5802 /* Get the .plt section contents. */
5803 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5804 if (plt_contents == NULL)
5805 return NULL;
5806 if (!bfd_get_section_contents (abfd, (asection *) plt,
5807 plt_contents, 0, plt->size))
5808 {
5809bad_return:
5810 free (plt_contents);
5811 return NULL;
5812 }
144bed8d 5813
3972882e
L		 5814 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5815 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5816 goto bad_return;
144bed8d 5817
3972882e
L		 5818 hdr = &elf_section_data (relplt)->this_hdr;
5819 count = relplt->size / hdr->sh_entsize;
5820
5821 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5822 if (plt_sym_val == NULL)
5823 goto bad_return;
cca5b8b6 5824
35181b3e 5825 for (i = 0; i < count; i++)
3972882e 5826 plt_sym_val[i] = -1;
cca5b8b6 5827
3972882e
L		 5828 plt_offset = bed->plt->plt_entry_size;
5829 p = relplt->relocation;
5830 for (i = 0; i < count; i++, p++)
144bed8d 5831 {
3972882e
L		 5832 long reloc_index;
5833
6f25f223 5834 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
533d0af0 5835 if (p->howto == NULL)
6f25f223 5836 continue;
533d0af0
L		 5837
5838 if (p->howto->type != R_386_JUMP_SLOT
5839 && p->howto->type != R_386_IRELATIVE)
3972882e
L		 5840 continue;
5841
5842 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5843 + bed->plt->plt_reloc_offset));
5844 reloc_index /= sizeof (Elf32_External_Rel);
ec1f73bb
AM		 5845 if (reloc_index < count)
5846 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5847
144bed8d 5848 plt_offset += bed->plt->plt_entry_size;
fca6ae69
L		 5849
5850 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5851 section. */
5852 if (plt_offset >= plt->size)
5853 break;
144bed8d
L		 5854 }
5855
3972882e
L		 5856 free (plt_contents);
5857
5858 return plt_sym_val;
5859}
5860
5861/* Similar to _bfd_elf_get_synthetic_symtab. */
5862
5863static long
5864elf_i386_get_synthetic_symtab (bfd *abfd,
5865 long symcount,
5866 asymbol **syms,
5867 long dynsymcount,
5868 asymbol **dynsyms,
5869 asymbol **ret)
5870{
5871 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5872 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5873 dynsymcount, dynsyms, ret,
5874 plt,
5875 elf_i386_get_plt_sym_val);
4c45e5c9
JJ		 5876}
5877
fdc90cb4
JJ		 5878/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5879
5880static bfd_boolean
5881elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5882{
5883 if (h->plt.offset != (bfd_vma) -1
5884 && !h->def_regular
5885 && !h->pointer_equality_needed)
5886 return FALSE;
5887
5888 return _bfd_elf_hash_symbol (h);
5889}
4c45e5c9 5890
d8045f23
NC		 5891/* Hook called by the linker routine which adds symbols from an object
5892 file. */
5893
5894static bfd_boolean
c16153ae 5895elf_i386_add_symbol_hook (bfd * abfd,
f1885d1e 5896 struct bfd_link_info * info,
d8045f23
NC		 5897 Elf_Internal_Sym * sym,
5898 const char ** namep ATTRIBUTE_UNUSED,
5899 flagword * flagsp ATTRIBUTE_UNUSED,
5900 asection ** secp ATTRIBUTE_UNUSED,
5901 bfd_vma * valp ATTRIBUTE_UNUSED)
5902{
13a2df29 5903 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
f1885d1e
AM		 5904 && (abfd->flags & DYNAMIC) == 0
5905 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
13a2df29
L		 5906 elf_tdata (info->output_bfd)->has_gnu_symbols
5907 |= elf_gnu_symbol_unique;
d8045f23
NC		 5908
5909 return TRUE;
5910}
5911
6d00b590 5912#define TARGET_LITTLE_SYM i386_elf32_vec
252b5132
RH		 5913#define TARGET_LITTLE_NAME "elf32-i386"
5914#define ELF_ARCH bfd_arch_i386
ae95ffa6 5915#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 5916#define ELF_MACHINE_CODE EM_386
5917#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 5918
5919#define elf_backend_can_gc_sections 1
51b64d56 5920#define elf_backend_can_refcount 1
252b5132
RH		 5921#define elf_backend_want_got_plt 1
5922#define elf_backend_plt_readonly 1
5923#define elf_backend_want_plt_sym 0
5924#define elf_backend_got_header_size 12
e41b3a13 5925#define elf_backend_plt_alignment 4
f7483970 5926#define elf_backend_extern_protected_data 1
252b5132 5927
8c29f035
AM		 5928/* Support RELA for objdump of prelink objects. */
5929#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 5930#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5931
13ae64f3 5932#define bfd_elf32_mkobject elf_i386_mkobject
13ae64f3 5933
dd5724d5
AM		 5934#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5935#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5936#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 5937#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3972882e 5938#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
dd5724d5
AM		 5939
5940#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
13285a1b 5941#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 5942#define elf_backend_check_relocs elf_i386_check_relocs
0ac8d2ca 5943#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6725bdbf 5944#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
0ac8d2ca 5945#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 5946#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5947#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5948#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5949#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
c5fccbec
DJ		 5950#define elf_backend_grok_prstatus elf_i386_grok_prstatus
5951#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 5952#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 5953#define elf_backend_relocate_section elf_i386_relocate_section
5954#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
67a4f2b7 5955#define elf_backend_always_size_sections elf_i386_always_size_sections
74541ad4
AM		 5956#define elf_backend_omit_section_dynsym \
5957 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
fdc90cb4 5958#define elf_backend_hash_symbol elf_i386_hash_symbol
d8045f23 5959#define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
aec6b87e 5960#define elf_backend_fixup_symbol elf_i386_fixup_symbol
dd5724d5 5961
252b5132 5962#include "elf32-target.h"
2bc3c89a
AM		 5963
5964/* FreeBSD support. */
5965
5966#undef TARGET_LITTLE_SYM
6d00b590 5967#define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
2bc3c89a
AM		 5968#undef TARGET_LITTLE_NAME
5969#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 5970#undef ELF_OSABI
5971#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 5972
5973/* The kernel recognizes executables as valid only if they carry a
5974 "FreeBSD" label in the ELF header. So we put this label on all
5975 executables and (for simplicity) also all other object files. */
5976
2bc3c89a 5977static void
d8045f23 5978elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 5979{
78245035 5980 _bfd_elf_post_process_headers (abfd, info);
2bc3c89a 5981
2bc3c89a 5982#ifdef OLD_FREEBSD_ABI_LABEL
cf7363b4
L		 5983 {
5984 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5985 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5986 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5987 }
caf47ea6 5988#endif
2bc3c89a
AM		 5989}
5990
5991#undef elf_backend_post_process_headers
d8045f23 5992#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC		 5993#undef elf32_bed
5994#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 5995
d8045f23
NC		 5996#undef elf_backend_add_symbol_hook
5997
2bc3c89a 5998#include "elf32-target.h"
eac338cf 5999
a6cc6b3b
RO		 6000/* Solaris 2. */
6001
6002#undef TARGET_LITTLE_SYM
6d00b590 6003#define TARGET_LITTLE_SYM i386_elf32_sol2_vec
a6cc6b3b
RO		 6004#undef TARGET_LITTLE_NAME
6005#define TARGET_LITTLE_NAME "elf32-i386-sol2"
6006
914082d1
L		 6007#undef elf_backend_post_process_headers
6008
a6cc6b3b
RO		 6009/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6010 objects won't be recognized. */
6011#undef ELF_OSABI
6012
6013#undef elf32_bed
6014#define elf32_bed elf32_i386_sol2_bed
6015
7dc98aea
RO		 6016/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6017 boundary. */
6018#undef elf_backend_static_tls_alignment
6019#define elf_backend_static_tls_alignment 8
6020
a6cc6b3b
RO		 6021/* The Solaris 2 ABI requires a plt symbol on all platforms.
6022
6023 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6024 File, p.63. */
6025#undef elf_backend_want_plt_sym
6026#define elf_backend_want_plt_sym 1
6027
6028#include "elf32-target.h"
6029
bf64a951
L		 6030/* Intel MCU support. */
6031
6032static bfd_boolean
6033elf32_iamcu_elf_object_p (bfd *abfd)
6034{
6035 /* Set the right machine number for an IAMCU elf32 file. */
6036 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
6037 return TRUE;
6038}
6039
6040#undef TARGET_LITTLE_SYM
6041#define TARGET_LITTLE_SYM iamcu_elf32_vec
6042#undef TARGET_LITTLE_NAME
6043#define TARGET_LITTLE_NAME "elf32-iamcu"
6044#undef ELF_ARCH
6045#define ELF_ARCH bfd_arch_iamcu
6046
6047#undef ELF_MACHINE_CODE
6048#define ELF_MACHINE_CODE EM_IAMCU
6049
6050#undef ELF_OSABI
6051
6052#undef elf32_bed
6053#define elf32_bed elf32_iamcu_bed
6054
6055#undef elf_backend_object_p
6056#define elf_backend_object_p elf32_iamcu_elf_object_p
6057
6058#undef elf_backend_static_tls_alignment
6059
6060#undef elf_backend_want_plt_sym
6061#define elf_backend_want_plt_sym 0
6062
6063#include "elf32-target.h"
6064
6065/* Restore defaults. */
6066#undef ELF_ARCH
6067#define ELF_ARCH bfd_arch_i386
6068#undef ELF_MACHINE_CODE
6069#define ELF_MACHINE_CODE EM_386
6070
a27e4371
RM		 6071/* Native Client support. */
6072
6073#undef TARGET_LITTLE_SYM
6d00b590 6074#define TARGET_LITTLE_SYM i386_elf32_nacl_vec
a27e4371
RM		 6075#undef TARGET_LITTLE_NAME
6076#define TARGET_LITTLE_NAME "elf32-i386-nacl"
6077#undef elf32_bed
6078#define elf32_bed elf32_i386_nacl_bed
6079
6080#undef ELF_MAXPAGESIZE
6081#define ELF_MAXPAGESIZE 0x10000
6082
6083/* Restore defaults. */
6084#undef ELF_OSABI
6085#undef elf_backend_want_plt_sym
6086#define elf_backend_want_plt_sym 0
6087#undef elf_backend_post_process_headers
a27e4371
RM		 6088#undef elf_backend_static_tls_alignment
6089
6090/* NaCl uses substantially different PLT entries for the same effects. */
6091
6092#undef elf_backend_plt_alignment
6093#define elf_backend_plt_alignment 5
6094#define NACL_PLT_ENTRY_SIZE 64
6095#define NACLMASK 0xe0 /* 32-byte alignment mask. */
6096
6097static const bfd_byte elf_i386_nacl_plt0_entry[] =
6098 {
6099 0xff, 0x35, /* pushl contents of address */
6100 0, 0, 0, 0, /* replaced with address of .got + 4. */
6101 0x8b, 0x0d, /* movl contents of address, %ecx */
6102 0, 0, 0, 0, /* replaced with address of .got + 8. */
6103 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6104 0xff, 0xe1 /* jmp *%ecx */
6105 };
6106
6107static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6108 {
6109 0x8b, 0x0d, /* movl contents of address, %ecx */
6110 0, 0, 0, 0, /* replaced with GOT slot address. */
6111 0x83, 0xe1, NACLMASK, /* 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 reloc offset. */
6122 0xe9, /* jmp relative */
6123 0, 0, 0, 0, /* replaced with offset to .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
6132elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
6133 {
6134 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6135 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6136 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6137 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 6138
6139 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6140 so pad to that size with nop instructions. */
6141 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 6142 };
6143
6144static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
6145 {
6146 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6147 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6148 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6149 0xff, 0xe1, /* jmp *%ecx */
6150
6151 /* Pad to the next 32-byte boundary with nop instructions. */
6152 0x90,
6153 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6154 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6155
6156 /* Lazy GOT entries point here (32-byte aligned). */
6157 0x68, /* pushl immediate */
6158 0, 0, 0, 0, /* replaced with offset into relocation table. */
6159 0xe9, /* jmp relative */
6160 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6161
6162 /* Pad to the next 32-byte boundary with nop instructions. */
6163 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6164 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6165 0x90, 0x90
6166 };
6167
6168static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
6169 {
6170#if (PLT_CIE_LENGTH != 20 \
6171 || PLT_FDE_LENGTH != 36 \
6172 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6173 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6174# error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6175#endif
6176 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6177 0, 0, 0, 0, /* CIE ID */
6178 1, /* CIE version */
6179 'z', 'R', 0, /* Augmentation string */
6180 1, /* Code alignment factor */
6181 0x7c, /* Data alignment factor: -4 */
6182 8, /* Return address column */
6183 1, /* Augmentation size */
6184 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6185 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6186 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6187 DW_CFA_nop, DW_CFA_nop,
6188
6189 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6190 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
6191 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6192 0, 0, 0, 0, /* .plt size goes here */
6193 0, /* Augmentation size */
6194 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
6195 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6196 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
6197 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6198 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6199 13, /* Block length */
6200 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
6201 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
6202 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6203 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
6204 DW_CFA_nop, DW_CFA_nop
6205 };
6206
6207static const struct elf_i386_plt_layout elf_i386_nacl_plt =
6208 {
6209 elf_i386_nacl_plt0_entry, /* plt0_entry */
6210 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
6211 2, /* plt0_got1_offset */
6212 8, /* plt0_got2_offset */
6213 elf_i386_nacl_plt_entry, /* plt_entry */
6214 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6215 2, /* plt_got_offset */
6216 33, /* plt_reloc_offset */
6217 38, /* plt_plt_offset */
6218 32, /* plt_lazy_offset */
6219 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6220 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6221 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6222 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
6223 };
6224
6225static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6226 {
6227 &elf_i386_nacl_plt, /* plt */
6228 0x90, /* plt0_pad_byte: nop insn */
6229 0, /* is_vxworks */
6230 };
6231
64b384e1
RM		 6232static bfd_boolean
6233elf32_i386_nacl_elf_object_p (bfd *abfd)
6234{
6235 /* Set the right machine number for a NaCl i386 ELF32 file. */
6236 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6237 return TRUE;
6238}
6239
a27e4371
RM		 6240#undef elf_backend_arch_data
6241#define elf_backend_arch_data &elf_i386_nacl_arch_bed
6242
64b384e1
RM		 6243#undef elf_backend_object_p
6244#define elf_backend_object_p elf32_i386_nacl_elf_object_p
5a68afcf
RM		 6245#undef elf_backend_modify_segment_map
6246#define elf_backend_modify_segment_map nacl_modify_segment_map
6247#undef elf_backend_modify_program_headers
6248#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 6249#undef elf_backend_final_write_processing
6250#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 6251
a27e4371
RM		 6252#include "elf32-target.h"
6253
5a68afcf 6254/* Restore defaults. */
64b384e1 6255#undef elf_backend_object_p
5a68afcf
RM		 6256#undef elf_backend_modify_segment_map
6257#undef elf_backend_modify_program_headers
887badb3 6258#undef elf_backend_final_write_processing
5a68afcf 6259
eac338cf
PB		 6260/* VxWorks support. */
6261
6262#undef TARGET_LITTLE_SYM
6d00b590 6263#define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
eac338cf
PB		 6264#undef TARGET_LITTLE_NAME
6265#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 6266#undef ELF_OSABI
a27e4371
RM		 6267#undef elf_backend_plt_alignment
6268#define elf_backend_plt_alignment 4
eac338cf 6269
23209a78
RM		 6270static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6271 {
25e762b9 6272 &elf_i386_plt, /* plt */
23209a78
RM		 6273 0x90, /* plt0_pad_byte */
6274 1, /* is_vxworks */
6275 };
eac338cf 6276
23209a78
RM		 6277#undef elf_backend_arch_data
6278#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 6279
13285a1b 6280#undef elf_backend_relocs_compatible
eac338cf
PB		 6281#undef elf_backend_add_symbol_hook
6282#define elf_backend_add_symbol_hook \
6283 elf_vxworks_add_symbol_hook
6284#undef elf_backend_link_output_symbol_hook
6285#define elf_backend_link_output_symbol_hook \
9c72ff84 6286 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 6287#undef elf_backend_emit_relocs
6288#define elf_backend_emit_relocs elf_vxworks_emit_relocs
6289#undef elf_backend_final_write_processing
6290#define elf_backend_final_write_processing \
6291 elf_vxworks_final_write_processing
7dc98aea 6292#undef elf_backend_static_tls_alignment
eac338cf
PB		 6293
6294/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6295 define it. */
6296#undef elf_backend_want_plt_sym
6297#define elf_backend_want_plt_sym 1
6298
6299#undef elf32_bed
6300#define elf32_bed elf32_i386_vxworks_bed
6301
6302#include "elf32-target.h"
GDB Binutils - Deliverables
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