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Add x86 size relocation support to bfd
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
CommitLineData
252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
b2a8e766 2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
1d7e9d18 3 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
9f973f28 4 Free Software Foundation, Inc.
252b5132 5
571fe01f 6 This file is part of BFD, the Binary File Descriptor library.
252b5132 7
571fe01f
NC		 8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
cd123cb7 10 the Free Software Foundation; either version 3 of the License, or
571fe01f 11 (at your option) any later version.
252b5132 12
571fe01f
NC		 13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
252b5132 17
571fe01f
NC		 18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
cd123cb7
NC		 20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
252b5132 22
252b5132 23#include "sysdep.h"
3db64b00 24#include "bfd.h"
252b5132
RH		 25#include "bfdlink.h"
26#include "libbfd.h"
27#include "elf-bfd.h"
5a68afcf 28#include "elf-nacl.h"
eac338cf 29#include "elf-vxworks.h"
142411ca 30#include "bfd_stdint.h"
c25bc9fc
L		 31#include "objalloc.h"
32#include "hashtab.h"
e41b3a13 33#include "dwarf2.h"
252b5132 34
55fd94b0
AM		 35/* 386 uses REL relocations instead of RELA. */
36#define USE_REL 1
252b5132
RH		 37
38#include "elf/i386.h"
39
40static reloc_howto_type elf_howto_table[]=
41{
b34976b6 42 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
1b452ec6 43 bfd_elf_generic_reloc, "R_386_NONE",
b34976b6
AM		 44 TRUE, 0x00000000, 0x00000000, FALSE),
45 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 46 bfd_elf_generic_reloc, "R_386_32",
b34976b6
AM		 47 TRUE, 0xffffffff, 0xffffffff, FALSE),
48 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 49 bfd_elf_generic_reloc, "R_386_PC32",
b34976b6
AM		 50 TRUE, 0xffffffff, 0xffffffff, TRUE),
51 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 52 bfd_elf_generic_reloc, "R_386_GOT32",
b34976b6
AM		 53 TRUE, 0xffffffff, 0xffffffff, FALSE),
54 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 55 bfd_elf_generic_reloc, "R_386_PLT32",
b34976b6
AM		 56 TRUE, 0xffffffff, 0xffffffff, TRUE),
57 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 58 bfd_elf_generic_reloc, "R_386_COPY",
b34976b6
AM		 59 TRUE, 0xffffffff, 0xffffffff, FALSE),
60 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 61 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
b34976b6
AM		 62 TRUE, 0xffffffff, 0xffffffff, FALSE),
63 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 64 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
b34976b6
AM		 65 TRUE, 0xffffffff, 0xffffffff, FALSE),
66 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 67 bfd_elf_generic_reloc, "R_386_RELATIVE",
b34976b6
AM		 68 TRUE, 0xffffffff, 0xffffffff, FALSE),
69 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 70 bfd_elf_generic_reloc, "R_386_GOTOFF",
b34976b6
AM		 71 TRUE, 0xffffffff, 0xffffffff, FALSE),
72 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 73 bfd_elf_generic_reloc, "R_386_GOTPC",
b34976b6 74 TRUE, 0xffffffff, 0xffffffff, TRUE),
1b452ec6 75
dc47f327
AM		 76 /* We have a gap in the reloc numbers here.
77 R_386_standard counts the number up to this point, and
78 R_386_ext_offset is the value to subtract from a reloc type of
79 R_386_16 thru R_386_PC8 to form an index into this table. */
55fd94b0
AM		 80#define R_386_standard (R_386_GOTPC + 1)
81#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
1b452ec6 82
37e55690 83 /* These relocs are a GNU extension. */
b34976b6 84 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 85 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
b34976b6
AM		 86 TRUE, 0xffffffff, 0xffffffff, FALSE),
87 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 88 bfd_elf_generic_reloc, "R_386_TLS_IE",
b34976b6
AM		 89 TRUE, 0xffffffff, 0xffffffff, FALSE),
90 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 91 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
b34976b6
AM		 92 TRUE, 0xffffffff, 0xffffffff, FALSE),
93 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 94 bfd_elf_generic_reloc, "R_386_TLS_LE",
b34976b6
AM		 95 TRUE, 0xffffffff, 0xffffffff, FALSE),
96 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 97 bfd_elf_generic_reloc, "R_386_TLS_GD",
b34976b6
AM		 98 TRUE, 0xffffffff, 0xffffffff, FALSE),
99 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 100 bfd_elf_generic_reloc, "R_386_TLS_LDM",
b34976b6
AM		 101 TRUE, 0xffffffff, 0xffffffff, FALSE),
102 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
1b452ec6 103 bfd_elf_generic_reloc, "R_386_16",
b34976b6 104 TRUE, 0xffff, 0xffff, FALSE),
b0360d8c 105 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
1b452ec6 106 bfd_elf_generic_reloc, "R_386_PC16",
b34976b6
AM		 107 TRUE, 0xffff, 0xffff, TRUE),
108 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
1b452ec6 109 bfd_elf_generic_reloc, "R_386_8",
b34976b6
AM		 110 TRUE, 0xff, 0xff, FALSE),
111 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
1b452ec6 112 bfd_elf_generic_reloc, "R_386_PC8",
b34976b6 113 TRUE, 0xff, 0xff, TRUE),
dc47f327 114
55fd94b0
AM		 115#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
116#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
13ae64f3 117 /* These are common with Solaris TLS implementation. */
b34976b6 118 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 119 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
b34976b6
AM		 120 TRUE, 0xffffffff, 0xffffffff, FALSE),
121 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 122 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
b34976b6
AM		 123 TRUE, 0xffffffff, 0xffffffff, FALSE),
124 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 125 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
b34976b6
AM		 126 TRUE, 0xffffffff, 0xffffffff, FALSE),
127 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 128 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
b34976b6
AM		 129 TRUE, 0xffffffff, 0xffffffff, FALSE),
130 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 131 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
b34976b6
AM		 132 TRUE, 0xffffffff, 0xffffffff, FALSE),
133 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 134 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
b34976b6 135 TRUE, 0xffffffff, 0xffffffff, FALSE),
1788fc08
L		 136 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
137 bfd_elf_generic_reloc, "R_386_SIZE32",
138 TRUE, 0xffffffff, 0xffffffff, FALSE),
67a4f2b7
AO		 139 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
141 TRUE, 0xffffffff, 0xffffffff, FALSE),
142 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
143 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
144 FALSE, 0, 0, FALSE),
145 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_386_TLS_DESC",
147 TRUE, 0xffffffff, 0xffffffff, FALSE),
cbe950e9
L		 148 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_386_IRELATIVE",
150 TRUE, 0xffffffff, 0xffffffff, FALSE),
13ae64f3
JJ		 151
152 /* Another gap. */
cbe950e9
L		 153#define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
154#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
252b5132
RH		 155
156/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH		 157 HOWTO (R_386_GNU_VTINHERIT, /* type */
158 0, /* rightshift */
159 2, /* size (0 = byte, 1 = short, 2 = long) */
160 0, /* bitsize */
b34976b6 161 FALSE, /* pc_relative */
252b5132
RH		 162 0, /* bitpos */
163 complain_overflow_dont, /* complain_on_overflow */
164 NULL, /* special_function */
165 "R_386_GNU_VTINHERIT", /* name */
b34976b6 166 FALSE, /* partial_inplace */
252b5132
RH		 167 0, /* src_mask */
168 0, /* dst_mask */
b34976b6 169 FALSE), /* pcrel_offset */
252b5132
RH		 170
171/* GNU extension to record C++ vtable member usage. */
252b5132
RH		 172 HOWTO (R_386_GNU_VTENTRY, /* type */
173 0, /* rightshift */
174 2, /* size (0 = byte, 1 = short, 2 = long) */
175 0, /* bitsize */
b34976b6 176 FALSE, /* pc_relative */
252b5132
RH		 177 0, /* bitpos */
178 complain_overflow_dont, /* complain_on_overflow */
179 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
180 "R_386_GNU_VTENTRY", /* name */
b34976b6 181 FALSE, /* partial_inplace */
252b5132
RH		 182 0, /* src_mask */
183 0, /* dst_mask */
b34976b6 184 FALSE) /* pcrel_offset */
dc47f327 185
55fd94b0 186#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
dc47f327
AM		 187
188};
189
252b5132 190#ifdef DEBUG_GEN_RELOC
55fd94b0
AM		 191#define TRACE(str) \
192 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH		 193#else
194#define TRACE(str)
195#endif
196
197static reloc_howto_type *
55fd94b0
AM		 198elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
199 bfd_reloc_code_real_type code)
252b5132
RH		 200{
201 switch (code)
202 {
203 case BFD_RELOC_NONE:
204 TRACE ("BFD_RELOC_NONE");
55fd94b0 205 return &elf_howto_table[R_386_NONE];
252b5132
RH		 206
207 case BFD_RELOC_32:
208 TRACE ("BFD_RELOC_32");
55fd94b0 209 return &elf_howto_table[R_386_32];
252b5132
RH		 210
211 case BFD_RELOC_CTOR:
212 TRACE ("BFD_RELOC_CTOR");
55fd94b0 213 return &elf_howto_table[R_386_32];
252b5132
RH		 214
215 case BFD_RELOC_32_PCREL:
216 TRACE ("BFD_RELOC_PC32");
55fd94b0 217 return &elf_howto_table[R_386_PC32];
252b5132
RH		 218
219 case BFD_RELOC_386_GOT32:
220 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 221 return &elf_howto_table[R_386_GOT32];
252b5132
RH		 222
223 case BFD_RELOC_386_PLT32:
224 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 225 return &elf_howto_table[R_386_PLT32];
252b5132
RH		 226
227 case BFD_RELOC_386_COPY:
228 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 229 return &elf_howto_table[R_386_COPY];
252b5132
RH		 230
231 case BFD_RELOC_386_GLOB_DAT:
232 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 233 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH		 234
235 case BFD_RELOC_386_JUMP_SLOT:
236 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 237 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH		 238
239 case BFD_RELOC_386_RELATIVE:
240 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 241 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH		 242
243 case BFD_RELOC_386_GOTOFF:
244 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 245 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH		 246
247 case BFD_RELOC_386_GOTPC:
248 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 249 return &elf_howto_table[R_386_GOTPC];
252b5132 250
37e55690
JJ		 251 /* These relocs are a GNU extension. */
252 case BFD_RELOC_386_TLS_TPOFF:
253 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 254 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ		 255
256 case BFD_RELOC_386_TLS_IE:
257 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 258 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ		 259
260 case BFD_RELOC_386_TLS_GOTIE:
261 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 262 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 263
13ae64f3
JJ		 264 case BFD_RELOC_386_TLS_LE:
265 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 266 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ		 267
268 case BFD_RELOC_386_TLS_GD:
269 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 270 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ		 271
272 case BFD_RELOC_386_TLS_LDM:
273 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 274 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 275
252b5132
RH		 276 case BFD_RELOC_16:
277 TRACE ("BFD_RELOC_16");
55fd94b0 278 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH		 279
280 case BFD_RELOC_16_PCREL:
281 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 282 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH		 283
284 case BFD_RELOC_8:
285 TRACE ("BFD_RELOC_8");
55fd94b0 286 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH		 287
288 case BFD_RELOC_8_PCREL:
289 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 290 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 291
13ae64f3
JJ		 292 /* Common with Sun TLS implementation. */
293 case BFD_RELOC_386_TLS_LDO_32:
294 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 295 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ		 296
297 case BFD_RELOC_386_TLS_IE_32:
298 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 299 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ		 300
301 case BFD_RELOC_386_TLS_LE_32:
302 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 303 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ		 304
305 case BFD_RELOC_386_TLS_DTPMOD32:
306 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 307 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ		 308
309 case BFD_RELOC_386_TLS_DTPOFF32:
310 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 311 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ		 312
313 case BFD_RELOC_386_TLS_TPOFF32:
314 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 315 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 316
1788fc08
L		 317 case BFD_RELOC_SIZE32:
318 TRACE ("BFD_RELOC_SIZE32");
319 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
320
67a4f2b7
AO		 321 case BFD_RELOC_386_TLS_GOTDESC:
322 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
323 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
324
325 case BFD_RELOC_386_TLS_DESC_CALL:
326 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
327 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
328
329 case BFD_RELOC_386_TLS_DESC:
330 TRACE ("BFD_RELOC_386_TLS_DESC");
331 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
332
cbe950e9
L		 333 case BFD_RELOC_386_IRELATIVE:
334 TRACE ("BFD_RELOC_386_IRELATIVE");
2a750708 335 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
cbe950e9 336
252b5132
RH		 337 case BFD_RELOC_VTABLE_INHERIT:
338 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 339 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH		 340
341 case BFD_RELOC_VTABLE_ENTRY:
342 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 343 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH		 344
345 default:
346 break;
347 }
348
349 TRACE ("Unknown");
350 return 0;
351}
352
157090f7
AM		 353static reloc_howto_type *
354elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
355 const char *r_name)
356{
357 unsigned int i;
358
359 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
360 if (elf_howto_table[i].name != NULL
361 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
362 return &elf_howto_table[i];
363
364 return NULL;
365}
366
142411ca
L		 367static reloc_howto_type *
368elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
252b5132 369{
dc47f327
AM		 370 unsigned int indx;
371
372 if ((indx = r_type) >= R_386_standard
373 && ((indx = r_type - R_386_ext_offset) - R_386_standard
374 >= R_386_ext - R_386_standard)
13ae64f3 375 && ((indx = r_type - R_386_tls_offset) - R_386_ext
cbe950e9
L		 376 >= R_386_irelative - R_386_ext)
377 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
378 >= R_386_vt - R_386_irelative))
252b5132 379 {
d003868e
AM		 380 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
381 abfd, (int) r_type);
55fd94b0 382 indx = R_386_NONE;
252b5132 383 }
142411ca
L		 384 BFD_ASSERT (elf_howto_table [indx].type == r_type);
385 return &elf_howto_table[indx];
386}
387
388static void
389elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
390 arelent *cache_ptr,
391 Elf_Internal_Rela *dst)
392{
393 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
394 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
252b5132
RH		 395}
396
397/* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
402
b34976b6 403static bfd_boolean
55fd94b0 404elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH		 405{
406 if (name[0] == '.' && name[1] == 'X')
b34976b6 407 return TRUE;
252b5132
RH		 408
409 return _bfd_elf_is_local_label_name (abfd, name);
410}
411\f
38701953 412/* Support for core dump NOTE sections. */
61adc1a4 413
b34976b6 414static bfd_boolean
55fd94b0 415elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM		 416{
417 int offset;
eea6121a 418 size_t size;
38701953 419
61adc1a4 420 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 421 {
61adc1a4
NC		 422 int pr_version = bfd_get_32 (abfd, note->descdata);
423
424 if (pr_version != 1)
425 return FALSE;
426
427 /* pr_cursig */
428 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
429
430 /* pr_pid */
261b8d08 431 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
61adc1a4
NC		 432
433 /* pr_reg */
434 offset = 28;
eea6121a 435 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC		 436 }
437 else
438 {
439 switch (note->descsz)
440 {
441 default:
442 return FALSE;
38701953 443
61adc1a4
NC		 444 case 144: /* Linux/i386 */
445 /* pr_cursig */
446 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 447
61adc1a4 448 /* pr_pid */
261b8d08 449 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
38701953 450
61adc1a4
NC		 451 /* pr_reg */
452 offset = 72;
eea6121a 453 size = 68;
38701953 454
61adc1a4
NC		 455 break;
456 }
38701953
AM		 457 }
458
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 461 size, note->descpos + offset);
38701953
AM		 462}
463
b34976b6 464static bfd_boolean
55fd94b0 465elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 466{
61adc1a4 467 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 468 {
61adc1a4
NC		 469 int pr_version = bfd_get_32 (abfd, note->descdata);
470
471 if (pr_version != 1)
b34976b6 472 return FALSE;
38701953 473
61adc1a4
NC		 474 elf_tdata (abfd)->core_program
475 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
476 elf_tdata (abfd)->core_command
477 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
478 }
479 else
480 {
481 switch (note->descsz)
482 {
483 default:
484 return FALSE;
485
486 case 124: /* Linux/i386 elf_prpsinfo. */
261b8d08
PA		 487 elf_tdata (abfd)->core_pid
488 = bfd_get_32 (abfd, note->descdata + 12);
61adc1a4
NC		 489 elf_tdata (abfd)->core_program
490 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
491 elf_tdata (abfd)->core_command
492 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
493 }
38701953
AM		 494 }
495
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
38701953
AM		 499 {
500 char *command = elf_tdata (abfd)->core_command;
501 int n = strlen (command);
502
503 if (0 < n && command[n - 1] == ' ')
504 command[n - 1] = '\0';
505 }
506
b34976b6 507 return TRUE;
38701953
AM		 508}
509\f
510/* Functions for the i386 ELF linker.
511
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
514 following:
515
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
522
252b5132
RH		 523
524/* The name of the dynamic interpreter. This is put in the .interp
525 section. */
526
527#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
528
a23b6845
AM		 529/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
532 shared lib. */
533#define ELIMINATE_COPY_RELOCS 1
534
252b5132
RH		 535/* The size in bytes of an entry in the procedure linkage table. */
536
537#define PLT_ENTRY_SIZE 16
538
539/* The first entry in an absolute procedure linkage table looks like
eac338cf
PB		 540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 542
eac338cf 543static const bfd_byte elf_i386_plt0_entry[12] =
252b5132
RH		 544{
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
eac338cf 548 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 549};
550
551/* Subsequent entries in an absolute procedure linkage table look like
552 this. */
553
554static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
555{
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
562};
563
eac338cf
PB		 564/* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 566
eac338cf 567static const bfd_byte elf_i386_pic_plt0_entry[12] =
252b5132
RH		 568{
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 571};
572
573/* Subsequent entries in a PIC procedure linkage table look like this. */
574
575static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
576{
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
583};
584
e41b3a13
JJ		 585/* .eh_frame covering the .plt section. */
586
587static const bfd_byte elf_i386_eh_frame_plt[] =
588{
589#define PLT_CIE_LENGTH 20
590#define PLT_FDE_LENGTH 36
591#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
592#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
593 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
594 0, 0, 0, 0, /* CIE ID */
595 1, /* CIE version */
596 'z', 'R', 0, /* Augmentation string */
597 1, /* Code alignment factor */
598 0x7c, /* Data alignment factor */
599 8, /* Return address column */
600 1, /* Augmentation size */
601 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
602 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
603 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
604 DW_CFA_nop, DW_CFA_nop,
605
606 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
607 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
608 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
609 0, 0, 0, 0, /* .plt size goes here */
610 0, /* Augmentation size */
611 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
612 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
613 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
614 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
615 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
616 11, /* Block length */
617 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
618 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
619 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
28ede8be 620 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
e41b3a13
JJ		 621 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
622};
623
25e762b9
RM		 624struct elf_i386_plt_layout
625{
626 /* The first entry in an absolute procedure linkage table looks like this. */
627 const bfd_byte *plt0_entry;
628 unsigned int plt0_entry_size;
629
630 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
631 unsigned int plt0_got1_offset;
632 unsigned int plt0_got2_offset;
633
634 /* Later entries in an absolute procedure linkage table look like this. */
635 const bfd_byte *plt_entry;
636 unsigned int plt_entry_size;
637
638 /* Offsets into plt_entry that are to be replaced with... */
639 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
640 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
641 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
642
643 /* Offset into plt_entry where the initial value of the GOT entry points. */
644 unsigned int plt_lazy_offset;
645
646 /* The first entry in a PIC procedure linkage table looks like this. */
647 const bfd_byte *pic_plt0_entry;
648
649 /* Subsequent entries in a PIC procedure linkage table look like this. */
650 const bfd_byte *pic_plt_entry;
651
652 /* .eh_frame covering the .plt section. */
653 const bfd_byte *eh_frame_plt;
654 unsigned int eh_frame_plt_size;
655};
656
657#define GET_PLT_ENTRY_SIZE(abfd) \
658 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
659
660/* These are the standard parameters. */
661static const struct elf_i386_plt_layout elf_i386_plt =
662 {
663 elf_i386_plt0_entry, /* plt0_entry */
664 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
665 2, /* plt0_got1_offset */
666 8, /* plt0_got2_offset */
667 elf_i386_plt_entry, /* plt_entry */
668 PLT_ENTRY_SIZE, /* plt_entry_size */
669 2, /* plt_got_offset */
670 7, /* plt_reloc_offset */
671 12, /* plt_plt_offset */
672 6, /* plt_lazy_offset */
673 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
674 elf_i386_pic_plt_entry, /* pic_plt_entry */
675 elf_i386_eh_frame_plt, /* eh_frame_plt */
676 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
677 };
678\f
679
eac338cf
PB		 680/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
681 for the PLTResolve stub and then for each PLT entry. */
682#define PLTRESOLVE_RELOCS_SHLIB 0
683#define PLTRESOLVE_RELOCS 2
684#define PLT_NON_JUMP_SLOT_RELOCS 2
685
23209a78
RM		 686/* Architecture-specific backend data for i386. */
687
688struct elf_i386_backend_data
689{
25e762b9
RM		 690 /* Parameters describing PLT generation. */
691 const struct elf_i386_plt_layout *plt;
692
23209a78
RM		 693 /* Value used to fill the unused bytes of the first PLT entry. */
694 bfd_byte plt0_pad_byte;
695
696 /* True if the target system is VxWorks. */
697 int is_vxworks;
698};
699
700#define get_elf_i386_backend_data(abfd) \
701 ((const struct elf_i386_backend_data *) \
702 get_elf_backend_data (abfd)->arch_data)
703
704/* These are the standard parameters. */
705static const struct elf_i386_backend_data elf_i386_arch_bed =
706 {
25e762b9 707 &elf_i386_plt, /* plt */
23209a78
RM		 708 0, /* plt0_pad_byte */
709 0, /* is_vxworks */
710 };
711
712#define elf_backend_arch_data &elf_i386_arch_bed
713
252b5132
RH		 714/* i386 ELF linker hash entry. */
715
716struct elf_i386_link_hash_entry
717{
ebe50bae 718 struct elf_link_hash_entry elf;
252b5132 719
0c715baa 720 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 721 struct elf_dyn_relocs *dyn_relocs;
13ae64f3 722
37e55690
JJ		 723#define GOT_UNKNOWN 0
724#define GOT_NORMAL 1
725#define GOT_TLS_GD 2
726#define GOT_TLS_IE 4
727#define GOT_TLS_IE_POS 5
728#define GOT_TLS_IE_NEG 6
729#define GOT_TLS_IE_BOTH 7
67a4f2b7
AO		 730#define GOT_TLS_GDESC 8
731#define GOT_TLS_GD_BOTH_P(type) \
732 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
733#define GOT_TLS_GD_P(type) \
734 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
735#define GOT_TLS_GDESC_P(type) \
736 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
737#define GOT_TLS_GD_ANY_P(type) \
738 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
37e55690 739 unsigned char tls_type;
67a4f2b7
AO		 740
741 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
742 starting at the end of the jump table. */
743 bfd_vma tlsdesc_got;
13ae64f3
JJ		 744};
745
746#define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
747
748struct elf_i386_obj_tdata
749{
750 struct elf_obj_tdata root;
751
752 /* tls_type for each local got entry. */
753 char *local_got_tls_type;
67a4f2b7
AO		 754
755 /* GOTPLT entries for TLS descriptors. */
756 bfd_vma *local_tlsdesc_gotent;
252b5132
RH		 757};
758
13ae64f3
JJ		 759#define elf_i386_tdata(abfd) \
760 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
761
762#define elf_i386_local_got_tls_type(abfd) \
763 (elf_i386_tdata (abfd)->local_got_tls_type)
764
67a4f2b7
AO		 765#define elf_i386_local_tlsdesc_gotent(abfd) \
766 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
767
0ffa91dd
NC		 768#define is_i386_elf(bfd) \
769 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
770 && elf_tdata (bfd) != NULL \
4dfe6ac6 771 && elf_object_id (bfd) == I386_ELF_DATA)
0ffa91dd 772
b34976b6 773static bfd_boolean
55fd94b0 774elf_i386_mkobject (bfd *abfd)
13ae64f3 775{
0ffa91dd 776 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
4dfe6ac6 777 I386_ELF_DATA);
13ae64f3 778}
cedb70c5 779
252b5132
RH		 780/* i386 ELF linker hash table. */
781
782struct elf_i386_link_hash_table
783{
ebe50bae 784 struct elf_link_hash_table elf;
252b5132 785
6725bdbf 786 /* Short-cuts to get to dynamic linker sections. */
6725bdbf
AM		 787 asection *sdynbss;
788 asection *srelbss;
e41b3a13 789 asection *plt_eh_frame;
9635fe29 790
4dfe6ac6
NC		 791 union
792 {
13ae64f3
JJ		 793 bfd_signed_vma refcount;
794 bfd_vma offset;
795 } tls_ldm_got;
796
67a4f2b7
AO		 797 /* The amount of space used by the reserved portion of the sgotplt
798 section, plus whatever space is used by the jump slots. */
799 bfd_vma sgotplt_jump_table_size;
800
87d72d41
AM		 801 /* Small local sym cache. */
802 struct sym_cache sym_cache;
9f03412a
AO		 803
804 /* _TLS_MODULE_BASE_ symbol. */
805 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L		 806
807 /* Used by local STT_GNU_IFUNC symbols. */
808 htab_t loc_hash_table;
4dfe6ac6
NC		 809 void * loc_hash_memory;
810
811 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
812 asection *srelplt2;
813
4dfe6ac6
NC		 814 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
815 bfd_vma next_tls_desc_index;
e1f98742
L		 816
817 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
818 bfd_vma next_jump_slot_index;
819
820 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
821 bfd_vma next_irelative_index;
6725bdbf 822};
252b5132
RH		 823
824/* Get the i386 ELF linker hash table from a link_info structure. */
825
826#define elf_i386_hash_table(p) \
4dfe6ac6
NC		 827 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
828 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
252b5132 829
67a4f2b7 830#define elf_i386_compute_jump_table_size(htab) \
5ae0bfb6 831 ((htab)->next_tls_desc_index * 4)
67a4f2b7 832
252b5132
RH		 833/* Create an entry in an i386 ELF linker hash table. */
834
835static struct bfd_hash_entry *
eb4ff4d6
L		 836elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
837 struct bfd_hash_table *table,
838 const char *string)
252b5132 839{
252b5132
RH		 840 /* Allocate the structure if it has not already been allocated by a
841 subclass. */
ebe50bae
AM		 842 if (entry == NULL)
843 {
a50b1753
NC		 844 entry = (struct bfd_hash_entry *)
845 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
ebe50bae
AM		 846 if (entry == NULL)
847 return entry;
848 }
252b5132
RH		 849
850 /* Call the allocation method of the superclass. */
ebe50bae
AM		 851 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
852 if (entry != NULL)
252b5132 853 {
ebe50bae
AM		 854 struct elf_i386_link_hash_entry *eh;
855
856 eh = (struct elf_i386_link_hash_entry *) entry;
857 eh->dyn_relocs = NULL;
13ae64f3 858 eh->tls_type = GOT_UNKNOWN;
67a4f2b7 859 eh->tlsdesc_got = (bfd_vma) -1;
252b5132
RH		 860 }
861
ebe50bae 862 return entry;
252b5132
RH		 863}
864
c25bc9fc
L		 865/* Compute a hash of a local hash entry. We use elf_link_hash_entry
866 for local symbol so that we can handle local STT_GNU_IFUNC symbols
867 as global symbol. We reuse indx and dynstr_index for local symbol
868 hash since they aren't used by global symbols in this backend. */
869
870static hashval_t
871elf_i386_local_htab_hash (const void *ptr)
872{
873 struct elf_link_hash_entry *h
874 = (struct elf_link_hash_entry *) ptr;
d2149d72 875 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L		 876}
877
878/* Compare local hash entries. */
879
880static int
881elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
882{
883 struct elf_link_hash_entry *h1
884 = (struct elf_link_hash_entry *) ptr1;
885 struct elf_link_hash_entry *h2
886 = (struct elf_link_hash_entry *) ptr2;
887
888 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
889}
890
891/* Find and/or create a hash entry for local symbol. */
892
893static struct elf_link_hash_entry *
894elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
895 bfd *abfd, const Elf_Internal_Rela *rel,
896 bfd_boolean create)
897{
898 struct elf_i386_link_hash_entry e, *ret;
899 asection *sec = abfd->sections;
d2149d72
L		 900 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
901 ELF32_R_SYM (rel->r_info));
c25bc9fc
L		 902 void **slot;
903
904 e.elf.indx = sec->id;
905 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
906 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
907 create ? INSERT : NO_INSERT);
908
909 if (!slot)
910 return NULL;
911
912 if (*slot)
913 {
914 ret = (struct elf_i386_link_hash_entry *) *slot;
915 return &ret->elf;
916 }
917
918 ret = (struct elf_i386_link_hash_entry *)
919 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
920 sizeof (struct elf_i386_link_hash_entry));
921 if (ret)
922 {
923 memset (ret, 0, sizeof (*ret));
924 ret->elf.indx = sec->id;
925 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
926 ret->elf.dynindx = -1;
c25bc9fc
L		 927 *slot = ret;
928 }
929 return &ret->elf;
930}
931
252b5132
RH		 932/* Create an i386 ELF linker hash table. */
933
934static struct bfd_link_hash_table *
55fd94b0 935elf_i386_link_hash_table_create (bfd *abfd)
252b5132
RH		 936{
937 struct elf_i386_link_hash_table *ret;
dc810e39 938 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
252b5132 939
a50b1753 940 ret = (struct elf_i386_link_hash_table *) bfd_malloc (amt);
ebe50bae 941 if (ret == NULL)
252b5132
RH		 942 return NULL;
943
eb4ff4d6
L		 944 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
945 elf_i386_link_hash_newfunc,
4dfe6ac6
NC		 946 sizeof (struct elf_i386_link_hash_entry),
947 I386_ELF_DATA))
252b5132 948 {
e2d34d7d 949 free (ret);
252b5132
RH		 950 return NULL;
951 }
952
6725bdbf
AM		 953 ret->sdynbss = NULL;
954 ret->srelbss = NULL;
332ce62b 955 ret->plt_eh_frame = NULL;
7a624474 956 ret->tls_ldm_got.refcount = 0;
5ae0bfb6 957 ret->next_tls_desc_index = 0;
67a4f2b7 958 ret->sgotplt_jump_table_size = 0;
87d72d41 959 ret->sym_cache.abfd = NULL;
eac338cf 960 ret->srelplt2 = NULL;
9f03412a 961 ret->tls_module_base = NULL;
e1f98742
L		 962 ret->next_jump_slot_index = 0;
963 ret->next_irelative_index = 0;
6725bdbf 964
c25bc9fc
L		 965 ret->loc_hash_table = htab_try_create (1024,
966 elf_i386_local_htab_hash,
967 elf_i386_local_htab_eq,
968 NULL);
969 ret->loc_hash_memory = objalloc_create ();
970 if (!ret->loc_hash_table || !ret->loc_hash_memory)
971 {
972 free (ret);
973 return NULL;
974 }
975
ebe50bae 976 return &ret->elf.root;
252b5132
RH		 977}
978
c25bc9fc
L		 979/* Destroy an i386 ELF linker hash table. */
980
981static void
982elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
983{
984 struct elf_i386_link_hash_table *htab
985 = (struct elf_i386_link_hash_table *) hash;
986
987 if (htab->loc_hash_table)
988 htab_delete (htab->loc_hash_table);
989 if (htab->loc_hash_memory)
990 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
991 _bfd_generic_link_hash_table_free (hash);
992}
993
6725bdbf
AM		 994/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
995 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
996 hash table. */
997
b34976b6 998static bfd_boolean
55fd94b0 999elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM		 1000{
1001 struct elf_i386_link_hash_table *htab;
1002
6725bdbf 1003 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 1004 return FALSE;
6725bdbf 1005
6de2ae4a 1006 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 1007 if (htab == NULL)
1008 return FALSE;
1009
3d4d4302 1010 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
6725bdbf 1011 if (!info->shared)
3d4d4302 1012 htab->srelbss = bfd_get_linker_section (dynobj, ".rel.bss");
6725bdbf 1013
6de2ae4a 1014 if (!htab->sdynbss
6725bdbf
AM		 1015 || (!info->shared && !htab->srelbss))
1016 abort ();
1017
23209a78 1018 if (get_elf_i386_backend_data (dynobj)->is_vxworks
6de2ae4a
L		 1019 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1020 &htab->srelplt2))
711de32c 1021 return FALSE;
eac338cf 1022
e41b3a13 1023 if (!info->no_ld_generated_unwind_info
2fe0fd06 1024 && htab->plt_eh_frame == NULL
e4de50d4 1025 && htab->elf.splt != NULL)
e41b3a13 1026 {
bbf96e4e
L		 1027 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1028 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1029 | SEC_LINKER_CREATED);
e41b3a13 1030 htab->plt_eh_frame
bbf96e4e 1031 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ		 1032 if (htab->plt_eh_frame == NULL
1033 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1034 return FALSE;
e41b3a13
JJ		 1035 }
1036
b34976b6 1037 return TRUE;
6725bdbf
AM		 1038}
1039
ebe50bae
AM		 1040/* Copy the extra info we tack onto an elf_link_hash_entry. */
1041
51b64d56 1042static void
fcfa13d2 1043elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
55fd94b0
AM		 1044 struct elf_link_hash_entry *dir,
1045 struct elf_link_hash_entry *ind)
ebe50bae
AM		 1046{
1047 struct elf_i386_link_hash_entry *edir, *eind;
1048
1049 edir = (struct elf_i386_link_hash_entry *) dir;
1050 eind = (struct elf_i386_link_hash_entry *) ind;
1051
bbd7ec4a 1052 if (eind->dyn_relocs != NULL)
ebe50bae 1053 {
bbd7ec4a
AM		 1054 if (edir->dyn_relocs != NULL)
1055 {
e03a8ed8
L		 1056 struct elf_dyn_relocs **pp;
1057 struct elf_dyn_relocs *p;
bbd7ec4a 1058
fcfa13d2 1059 /* Add reloc counts against the indirect sym to the direct sym
bbd7ec4a
AM		 1060 list. Merge any entries against the same section. */
1061 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1062 {
e03a8ed8 1063 struct elf_dyn_relocs *q;
bbd7ec4a
AM		 1064
1065 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1066 if (q->sec == p->sec)
1067 {
1068 q->pc_count += p->pc_count;
1069 q->count += p->count;
1070 *pp = p->next;
1071 break;
1072 }
1073 if (q == NULL)
1074 pp = &p->next;
1075 }
1076 *pp = edir->dyn_relocs;
1077 }
1078
ebe50bae
AM		 1079 edir->dyn_relocs = eind->dyn_relocs;
1080 eind->dyn_relocs = NULL;
1081 }
ebe50bae 1082
cd67d266
JJ		 1083 if (ind->root.type == bfd_link_hash_indirect
1084 && dir->got.refcount <= 0)
1085 {
1086 edir->tls_type = eind->tls_type;
1087 eind->tls_type = GOT_UNKNOWN;
1088 }
81848ca0
AM		 1089
1090 if (ELIMINATE_COPY_RELOCS
1091 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 1092 && dir->dynamic_adjusted)
1093 {
1094 /* If called to transfer flags for a weakdef during processing
1095 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1096 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1097 dir->ref_dynamic |= ind->ref_dynamic;
1098 dir->ref_regular |= ind->ref_regular;
1099 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1100 dir->needs_plt |= ind->needs_plt;
1101 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1102 }
81848ca0 1103 else
fcfa13d2 1104 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
ebe50bae
AM		 1105}
1106
142411ca
L		 1107/* Return TRUE if the TLS access code sequence support transition
1108 from R_TYPE. */
1109
1110static bfd_boolean
1111elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1112 bfd_byte *contents,
1113 Elf_Internal_Shdr *symtab_hdr,
1114 struct elf_link_hash_entry **sym_hashes,
1115 unsigned int r_type,
1116 const Elf_Internal_Rela *rel,
1117 const Elf_Internal_Rela *relend)
13ae64f3 1118{
142411ca
L		 1119 unsigned int val, type;
1120 unsigned long r_symndx;
1121 struct elf_link_hash_entry *h;
1122 bfd_vma offset;
1123
1124 /* Get the section contents. */
1125 if (contents == NULL)
1126 {
1127 if (elf_section_data (sec)->this_hdr.contents != NULL)
1128 contents = elf_section_data (sec)->this_hdr.contents;
1129 else
1130 {
1131 /* FIXME: How to better handle error condition? */
1132 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1133 return FALSE;
13ae64f3 1134
142411ca
L		 1135 /* Cache the section contents for elf_link_input_bfd. */
1136 elf_section_data (sec)->this_hdr.contents = contents;
1137 }
1138 }
1139
1140 offset = rel->r_offset;
13ae64f3 1141 switch (r_type)
142411ca
L		 1142 {
1143 case R_386_TLS_GD:
1144 case R_386_TLS_LDM:
1145 if (offset < 2 || (rel + 1) >= relend)
1146 return FALSE;
1147
1148 type = bfd_get_8 (abfd, contents + offset - 2);
1149 if (r_type == R_386_TLS_GD)
1150 {
09e8c3bf 1151 /* Check transition from GD access model. Only
142411ca
L		 1152 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1153 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1154 can transit to different access model. */
1155 if ((offset + 10) > sec->size ||
1156 (type != 0x8d && type != 0x04))
1157 return FALSE;
1158
1159 val = bfd_get_8 (abfd, contents + offset - 1);
1160 if (type == 0x04)
1161 {
1162 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1163 if (offset < 3)
1164 return FALSE;
1165
1166 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1167 return FALSE;
1168
1169 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1170 return FALSE;
1171 }
1172 else
1173 {
1174 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1175 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1176 return FALSE;
1177
1178 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1179 return FALSE;
1180 }
1181 }
1182 else
1183 {
1184 /* Check transition from LD access model. Only
1185 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1186 can transit to different access model. */
1187 if (type != 0x8d || (offset + 9) > sec->size)
1188 return FALSE;
1189
1190 val = bfd_get_8 (abfd, contents + offset - 1);
1191 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1192 return FALSE;
1193 }
1194
1195 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1196 return FALSE;
1197
1198 r_symndx = ELF32_R_SYM (rel[1].r_info);
1199 if (r_symndx < symtab_hdr->sh_info)
1200 return FALSE;
1201
1202 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b
L		 1203 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1204 may be versioned. */
142411ca
L		 1205 return (h != NULL
1206 && h->root.root.string != NULL
1207 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1208 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
c4fb387b
L		 1209 && (strncmp (h->root.root.string, "___tls_get_addr",
1210 15) == 0));
142411ca
L		 1211
1212 case R_386_TLS_IE:
1213 /* Check transition from IE access model:
1214 movl foo@indntpoff(%rip), %eax
1215 movl foo@indntpoff(%rip), %reg
1216 addl foo@indntpoff(%rip), %reg
1217 */
1218
1219 if (offset < 1 || (offset + 4) > sec->size)
1220 return FALSE;
1221
1222 /* Check "movl foo@tpoff(%rip), %eax" first. */
1223 val = bfd_get_8 (abfd, contents + offset - 1);
1224 if (val == 0xa1)
1225 return TRUE;
1226
1227 if (offset < 2)
1228 return FALSE;
1229
1230 /* Check movl|addl foo@tpoff(%rip), %reg. */
1231 type = bfd_get_8 (abfd, contents + offset - 2);
1232 return ((type == 0x8b || type == 0x03)
1233 && (val & 0xc7) == 0x05);
1234
1235 case R_386_TLS_GOTIE:
1236 case R_386_TLS_IE_32:
1237 /* Check transition from {IE_32,GOTIE} access model:
1238 subl foo@{tpoff,gontoff}(%reg1), %reg2
1239 movl foo@{tpoff,gontoff}(%reg1), %reg2
1240 addl foo@{tpoff,gontoff}(%reg1), %reg2
1241 */
1242
1243 if (offset < 2 || (offset + 4) > sec->size)
1244 return FALSE;
1245
1246 val = bfd_get_8 (abfd, contents + offset - 1);
1247 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1248 return FALSE;
1249
1250 type = bfd_get_8 (abfd, contents + offset - 2);
1251 return type == 0x8b || type == 0x2b || type == 0x03;
1252
1253 case R_386_TLS_GOTDESC:
1254 /* Check transition from GDesc access model:
1255 leal x@tlsdesc(%ebx), %eax
1256
1257 Make sure it's a leal adding ebx to a 32-bit offset
1258 into any register, although it's probably almost always
1259 going to be eax. */
1260
1261 if (offset < 2 || (offset + 4) > sec->size)
1262 return FALSE;
1263
1264 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1265 return FALSE;
1266
1267 val = bfd_get_8 (abfd, contents + offset - 1);
1268 return (val & 0xc7) == 0x83;
1269
1270 case R_386_TLS_DESC_CALL:
1271 /* Check transition from GDesc access model:
1272 call *x@tlsdesc(%rax)
1273 */
1274 if (offset + 2 <= sec->size)
1275 {
1276 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM		 1277 static const unsigned char call[] = { 0xff, 0x10 };
1278 return memcmp (contents + offset, call, 2) == 0;
142411ca
L		 1279 }
1280
1281 return FALSE;
1282
1283 default:
1284 abort ();
1285 }
1286}
1287
1288/* Return TRUE if the TLS access transition is OK or no transition
1289 will be performed. Update R_TYPE if there is a transition. */
1290
1291static bfd_boolean
1292elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1293 asection *sec, bfd_byte *contents,
1294 Elf_Internal_Shdr *symtab_hdr,
1295 struct elf_link_hash_entry **sym_hashes,
1296 unsigned int *r_type, int tls_type,
1297 const Elf_Internal_Rela *rel,
1298 const Elf_Internal_Rela *relend,
4c544807
L		 1299 struct elf_link_hash_entry *h,
1300 unsigned long r_symndx)
142411ca
L		 1301{
1302 unsigned int from_type = *r_type;
1303 unsigned int to_type = from_type;
1304 bfd_boolean check = TRUE;
1305
bb1cb422
L		 1306 /* Skip TLS transition for functions. */
1307 if (h != NULL
1308 && (h->type == STT_FUNC
1309 || h->type == STT_GNU_IFUNC))
1310 return TRUE;
1311
142411ca 1312 switch (from_type)
13ae64f3
JJ		 1313 {
1314 case R_386_TLS_GD:
67a4f2b7
AO		 1315 case R_386_TLS_GOTDESC:
1316 case R_386_TLS_DESC_CALL:
13ae64f3 1317 case R_386_TLS_IE_32:
37e55690
JJ		 1318 case R_386_TLS_IE:
1319 case R_386_TLS_GOTIE:
1d85728f 1320 if (info->executable)
142411ca
L		 1321 {
1322 if (h == NULL)
1323 to_type = R_386_TLS_LE_32;
1324 else if (from_type != R_386_TLS_IE
1325 && from_type != R_386_TLS_GOTIE)
1326 to_type = R_386_TLS_IE_32;
1327 }
1328
1329 /* When we are called from elf_i386_relocate_section, CONTENTS
1330 isn't NULL and there may be additional transitions based on
1331 TLS_TYPE. */
1332 if (contents != NULL)
1333 {
1334 unsigned int new_to_type = to_type;
1335
1d85728f 1336 if (info->executable
142411ca
L		 1337 && h != NULL
1338 && h->dynindx == -1
1339 && (tls_type & GOT_TLS_IE))
1340 new_to_type = R_386_TLS_LE_32;
1341
1342 if (to_type == R_386_TLS_GD
1343 || to_type == R_386_TLS_GOTDESC
1344 || to_type == R_386_TLS_DESC_CALL)
1345 {
1346 if (tls_type == GOT_TLS_IE_POS)
1347 new_to_type = R_386_TLS_GOTIE;
1348 else if (tls_type & GOT_TLS_IE)
1349 new_to_type = R_386_TLS_IE_32;
1350 }
1351
1352 /* We checked the transition before when we were called from
1353 elf_i386_check_relocs. We only want to check the new
1354 transition which hasn't been checked before. */
1355 check = new_to_type != to_type && from_type == to_type;
1356 to_type = new_to_type;
1357 }
1358
1359 break;
1360
13ae64f3 1361 case R_386_TLS_LDM:
1d85728f 1362 if (info->executable)
142411ca
L		 1363 to_type = R_386_TLS_LE_32;
1364 break;
1365
1366 default:
1367 return TRUE;
1368 }
1369
1370 /* Return TRUE if there is no transition. */
1371 if (from_type == to_type)
1372 return TRUE;
1373
1374 /* Check if the transition can be performed. */
1375 if (check
1376 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1377 symtab_hdr, sym_hashes,
1378 from_type, rel, relend))
1379 {
2f629d23 1380 reloc_howto_type *from, *to;
4c544807 1381 const char *name;
142411ca
L		 1382
1383 from = elf_i386_rtype_to_howto (abfd, from_type);
1384 to = elf_i386_rtype_to_howto (abfd, to_type);
1385
4c544807
L		 1386 if (h)
1387 name = h->root.root.string;
1388 else
1389 {
4c544807 1390 struct elf_i386_link_hash_table *htab;
4dfe6ac6 1391
4c544807 1392 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 1393 if (htab == NULL)
1394 name = "*unknown*";
1395 else
1396 {
1397 Elf_Internal_Sym *isym;
1398
1399 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1400 abfd, r_symndx);
1401 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1402 }
4c544807
L		 1403 }
1404
142411ca
L		 1405 (*_bfd_error_handler)
1406 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1407 "in section `%A' failed"),
4c544807 1408 abfd, sec, from->name, to->name, name,
142411ca
L		 1409 (unsigned long) rel->r_offset);
1410 bfd_set_error (bfd_error_bad_value);
1411 return FALSE;
13ae64f3
JJ		 1412 }
1413
142411ca
L		 1414 *r_type = to_type;
1415 return TRUE;
13ae64f3
JJ		 1416}
1417
252b5132 1418/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1419 calculate needed space in the global offset table, procedure linkage
1420 table, and dynamic reloc sections. */
252b5132 1421
b34976b6 1422static bfd_boolean
55fd94b0
AM		 1423elf_i386_check_relocs (bfd *abfd,
1424 struct bfd_link_info *info,
1425 asection *sec,
1426 const Elf_Internal_Rela *relocs)
252b5132 1427{
6725bdbf 1428 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1429 Elf_Internal_Shdr *symtab_hdr;
1430 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1431 const Elf_Internal_Rela *rel;
1432 const Elf_Internal_Rela *rel_end;
252b5132
RH		 1433 asection *sreloc;
1434
1049f94e 1435 if (info->relocatable)
b34976b6 1436 return TRUE;
252b5132 1437
0ffa91dd
NC		 1438 BFD_ASSERT (is_i386_elf (abfd));
1439
6725bdbf 1440 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 1441 if (htab == NULL)
1442 return FALSE;
1443
0ffa91dd 1444 symtab_hdr = &elf_symtab_hdr (abfd);
252b5132 1445 sym_hashes = elf_sym_hashes (abfd);
252b5132 1446
252b5132
RH		 1447 sreloc = NULL;
1448
1449 rel_end = relocs + sec->reloc_count;
1450 for (rel = relocs; rel < rel_end; rel++)
1451 {
13ae64f3 1452 unsigned int r_type;
252b5132
RH		 1453 unsigned long r_symndx;
1454 struct elf_link_hash_entry *h;
4c544807
L		 1455 Elf_Internal_Sym *isym;
1456 const char *name;
252b5132
RH		 1457
1458 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1459 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1460
d9bc7a44 1461 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1462 {
d003868e
AM		 1463 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1464 abfd,
8f615d07 1465 r_symndx);
b34976b6 1466 return FALSE;
f5f31454
L		 1467 }
1468
252b5132 1469 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1470 {
1471 /* A local symbol. */
c2e61a4e
L		 1472 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1473 abfd, r_symndx);
1474 if (isym == NULL)
1475 return FALSE;
c25bc9fc
L		 1476
1477 /* Check relocation against local STT_GNU_IFUNC symbol. */
c25bc9fc
L		 1478 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1479 {
9fff0c39 1480 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
c25bc9fc 1481 if (h == NULL)
c2e61a4e 1482 return FALSE;
6bbec505 1483
c25bc9fc
L		 1484 /* Fake a STT_GNU_IFUNC symbol. */
1485 h->type = STT_GNU_IFUNC;
1486 h->def_regular = 1;
1487 h->ref_regular = 1;
1488 h->forced_local = 1;
1489 h->root.type = bfd_link_hash_defined;
1490 }
1491 else
1492 h = NULL;
1493 }
252b5132 1494 else
71cb9464 1495 {
4c544807 1496 isym = NULL;
71cb9464
L		 1497 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1498 while (h->root.type == bfd_link_hash_indirect
1499 || h->root.type == bfd_link_hash_warning)
1500 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1501 }
cbe950e9 1502
c25bc9fc
L		 1503 if (h != NULL)
1504 {
cbe950e9
L		 1505 /* Create the ifunc sections for static executables. If we
1506 never see an indirect function symbol nor we are building
1507 a static executable, those sections will be empty and
1508 won't appear in output. */
1509 switch (r_type)
1510 {
1511 default:
1512 break;
1513
1514 case R_386_32:
1515 case R_386_PC32:
1516 case R_386_PLT32:
1517 case R_386_GOT32:
1518 case R_386_GOTOFF:
9d4057ee
AM		 1519 if (htab->elf.dynobj == NULL)
1520 htab->elf.dynobj = abfd;
1521 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
c2e61a4e 1522 return FALSE;
cbe950e9
L		 1523 break;
1524 }
1525
ad1e85de
L		 1526 /* It is referenced by a non-shared object. */
1527 h->ref_regular = 1;
71cb9464 1528 }
252b5132 1529
142411ca
L		 1530 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1531 symtab_hdr, sym_hashes,
1532 &r_type, GOT_UNKNOWN,
23209a78 1533 rel, rel_end, h, r_symndx))
c2e61a4e 1534 return FALSE;
13ae64f3
JJ		 1535
1536 switch (r_type)
252b5132 1537 {
37e55690
JJ		 1538 case R_386_TLS_LDM:
1539 htab->tls_ldm_got.refcount += 1;
1540 goto create_got;
1541
1542 case R_386_PLT32:
1543 /* This symbol requires a procedure linkage table entry. We
1544 actually build the entry in adjust_dynamic_symbol,
1545 because this might be a case of linking PIC code which is
1546 never referenced by a dynamic object, in which case we
1547 don't need to generate a procedure linkage table entry
1548 after all. */
1549
1550 /* If this is a local symbol, we resolve it directly without
1551 creating a procedure linkage table entry. */
1552 if (h == NULL)
1553 continue;
1554
f5385ebf 1555 h->needs_plt = 1;
37e55690
JJ		 1556 h->plt.refcount += 1;
1557 break;
1558
13ae64f3 1559 case R_386_TLS_IE_32:
37e55690
JJ		 1560 case R_386_TLS_IE:
1561 case R_386_TLS_GOTIE:
1d85728f 1562 if (!info->executable)
13ae64f3 1563 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1564 /* Fall through */
1565
252b5132 1566 case R_386_GOT32:
13ae64f3 1567 case R_386_TLS_GD:
67a4f2b7
AO		 1568 case R_386_TLS_GOTDESC:
1569 case R_386_TLS_DESC_CALL:
252b5132 1570 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1571 {
1572 int tls_type, old_tls_type;
1573
1574 switch (r_type)
1575 {
1576 default:
1577 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1578 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1579 case R_386_TLS_GOTDESC:
1580 case R_386_TLS_DESC_CALL:
1581 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1582 case R_386_TLS_IE_32:
1583 if (ELF32_R_TYPE (rel->r_info) == r_type)
1584 tls_type = GOT_TLS_IE_NEG;
1585 else
ebcfb3c0
JJ		 1586 /* If this is a GD->IE transition, we may use either of
1587 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1588 tls_type = GOT_TLS_IE;
1589 break;
1590 case R_386_TLS_IE:
1591 case R_386_TLS_GOTIE:
1592 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1593 }
1594
1595 if (h != NULL)
1596 {
1597 h->got.refcount += 1;
1598 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1599 }
1600 else
1601 {
1602 bfd_signed_vma *local_got_refcounts;
1603
1604 /* This is a global offset table entry for a local symbol. */
1605 local_got_refcounts = elf_local_got_refcounts (abfd);
1606 if (local_got_refcounts == NULL)
1607 {
1608 bfd_size_type size;
1609
1610 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1611 size *= (sizeof (bfd_signed_vma)
1612 + sizeof (bfd_vma) + sizeof(char));
a50b1753
NC		 1613 local_got_refcounts = (bfd_signed_vma *)
1614 bfd_zalloc (abfd, size);
13ae64f3 1615 if (local_got_refcounts == NULL)
c2e61a4e 1616 return FALSE;
13ae64f3 1617 elf_local_got_refcounts (abfd) = local_got_refcounts;
67a4f2b7
AO		 1618 elf_i386_local_tlsdesc_gotent (abfd)
1619 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
13ae64f3 1620 elf_i386_local_got_tls_type (abfd)
67a4f2b7 1621 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3
JJ		 1622 }
1623 local_got_refcounts[r_symndx] += 1;
1624 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1625 }
1626
37e55690
JJ		 1627 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1628 tls_type |= old_tls_type;
13ae64f3
JJ		 1629 /* If a TLS symbol is accessed using IE at least once,
1630 there is no point to use dynamic model for it. */
ebcfb3c0 1631 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1632 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1633 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1634 {
67a4f2b7 1635 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1636 tls_type = old_tls_type;
67a4f2b7
AO		 1637 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1638 && GOT_TLS_GD_ANY_P (tls_type))
1639 tls_type |= old_tls_type;
13ae64f3
JJ		 1640 else
1641 {
09a24cbf 1642 if (h)
4c544807
L		 1643 name = h->root.root.string;
1644 else
1645 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1646 NULL);
13ae64f3 1647 (*_bfd_error_handler)
d003868e 1648 (_("%B: `%s' accessed both as normal and "
55fd94b0 1649 "thread local symbol"),
4c544807 1650 abfd, name);
68c4a57e 1651 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1652 return FALSE;
13ae64f3
JJ		 1653 }
1654 }
1655
1656 if (old_tls_type != tls_type)
1657 {
1658 if (h != NULL)
1659 elf_i386_hash_entry (h)->tls_type = tls_type;
1660 else
1661 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1662 }
1663 }
0ac8d2ca
AM		 1664 /* Fall through */
1665
1666 case R_386_GOTOFF:
1667 case R_386_GOTPC:
13ae64f3 1668 create_got:
6de2ae4a 1669 if (htab->elf.sgot == NULL)
0ac8d2ca
AM		 1670 {
1671 if (htab->elf.dynobj == NULL)
1672 htab->elf.dynobj = abfd;
6de2ae4a 1673 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
c2e61a4e 1674 return FALSE;
0ac8d2ca 1675 }
37e55690
JJ		 1676 if (r_type != R_386_TLS_IE)
1677 break;
1678 /* Fall through */
252b5132 1679
37e55690
JJ		 1680 case R_386_TLS_LE_32:
1681 case R_386_TLS_LE:
1d85728f 1682 if (info->executable)
37e55690 1683 break;
bffbf940 1684 info->flags |= DF_STATIC_TLS;
b34976b6 1685 /* Fall through */
252b5132
RH		 1686
1687 case R_386_32:
1688 case R_386_PC32:
1788fc08 1689 case R_386_SIZE32:
710ab287 1690 if (h != NULL && info->executable)
6725bdbf 1691 {
12d0ee4a 1692 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1693 need a copy reloc. We can't check reliably at this
1694 stage whether the section is read-only, as input
1695 sections have not yet been mapped to output sections.
1696 Tentatively set the flag for now, and correct in
1697 adjust_dynamic_symbol. */
f5385ebf 1698 h->non_got_ref = 1;
12d0ee4a
AM		 1699
1700 /* We may need a .plt entry if the function this reloc
1701 refers to is in a shared lib. */
51b64d56 1702 h->plt.refcount += 1;
c6585bbb 1703 if (r_type != R_386_PC32)
f5385ebf 1704 h->pointer_equality_needed = 1;
6725bdbf 1705 }
7843f00e 1706
252b5132 1707 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1708 against a global symbol, or a non PC relative reloc
1709 against a local symbol, then we need to copy the reloc
1710 into the shared library. However, if we are linking with
1711 -Bsymbolic, we do not need to copy a reloc against a
1712 global symbol which is defined in an object we are
1713 including in the link (i.e., DEF_REGULAR is set). At
1714 this point we have not seen all the input files, so it is
1715 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1716 later (it is never cleared). In case of a weak definition,
1717 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1718 a shared library. We account for that possibility below by
1f655a09
L		 1719 storing information in the relocs_copied field of the hash
1720 table entry. A similar situation occurs when creating
1721 shared libraries and symbol visibility changes render the
12d0ee4a 1722 symbol local.
56882138 1723
12d0ee4a
AM		 1724 If on the other hand, we are creating an executable, we
1725 may need to keep relocations for symbols satisfied by a
1726 dynamic library if we manage to avoid copy relocs for the
1727 symbol. */
1728 if ((info->shared
1729 && (sec->flags & SEC_ALLOC) != 0
13ae64f3 1730 && (r_type != R_386_PC32
12d0ee4a 1731 || (h != NULL
55255dae 1732 && (! SYMBOLIC_BIND (info, h)
12d0ee4a 1733 || h->root.type == bfd_link_hash_defweak
f5385ebf 1734 || !h->def_regular))))
a23b6845
AM		 1735 || (ELIMINATE_COPY_RELOCS
1736 && !info->shared
12d0ee4a
AM		 1737 && (sec->flags & SEC_ALLOC) != 0
1738 && h != NULL
12d0ee4a 1739 && (h->root.type == bfd_link_hash_defweak
0f88be7a 1740 || !h->def_regular)))
252b5132 1741 {
e03a8ed8
L		 1742 struct elf_dyn_relocs *p;
1743 struct elf_dyn_relocs **head;
ec338859 1744
12d0ee4a
AM		 1745 /* We must copy these reloc types into the output file.
1746 Create a reloc section in dynobj and make room for
1747 this reloc. */
252b5132
RH		 1748 if (sreloc == NULL)
1749 {
0ac8d2ca
AM		 1750 if (htab->elf.dynobj == NULL)
1751 htab->elf.dynobj = abfd;
1752
83bac4b0
NC		 1753 sreloc = _bfd_elf_make_dynamic_reloc_section
1754 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1755
252b5132 1756 if (sreloc == NULL)
c2e61a4e 1757 return FALSE;
252b5132
RH		 1758 }
1759
0c715baa
AM		 1760 /* If this is a global symbol, we count the number of
1761 relocations we need for this symbol. */
1762 if (h != NULL)
252b5132 1763 {
ec338859 1764 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
0c715baa
AM		 1765 }
1766 else
1767 {
ec338859
AM		 1768 /* Track dynamic relocs needed for local syms too.
1769 We really need local syms available to do this
1770 easily. Oh well. */
87d72d41 1771 void **vpp;
ec338859 1772 asection *s;
87d72d41
AM		 1773
1774 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1775 abfd, r_symndx);
1776 if (isym == NULL)
1777 return FALSE;
1778
1779 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
ec338859 1780 if (s == NULL)
87d72d41 1781 s = sec;
ec338859 1782
e81d3500 1783 vpp = &elf_section_data (s)->local_dynrel;
e03a8ed8 1784 head = (struct elf_dyn_relocs **)vpp;
ec338859
AM		 1785 }
1786
1787 p = *head;
1788 if (p == NULL || p->sec != sec)
1789 {
1790 bfd_size_type amt = sizeof *p;
a50b1753
NC		 1791 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1792 amt);
ec338859 1793 if (p == NULL)
c2e61a4e 1794 return FALSE;
ec338859
AM		 1795 p->next = *head;
1796 *head = p;
1797 p->sec = sec;
1798 p->count = 0;
1799 p->pc_count = 0;
252b5132 1800 }
ec338859
AM		 1801
1802 p->count += 1;
13ae64f3 1803 if (r_type == R_386_PC32)
ec338859 1804 p->pc_count += 1;
252b5132 1805 }
252b5132
RH		 1806 break;
1807
1808 /* This relocation describes the C++ object vtable hierarchy.
1809 Reconstruct it for later use during GC. */
1810 case R_386_GNU_VTINHERIT:
d17e0c6e 1811 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 1812 return FALSE;
252b5132
RH		 1813 break;
1814
1815 /* This relocation describes which C++ vtable entries are actually
1816 used. Record for later use during GC. */
1817 case R_386_GNU_VTENTRY:
c6aa130f
MS		 1818 BFD_ASSERT (h != NULL);
1819 if (h != NULL
1820 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
c2e61a4e 1821 return FALSE;
252b5132
RH		 1822 break;
1823
1824 default:
1825 break;
1826 }
1827 }
1828
b34976b6 1829 return TRUE;
252b5132
RH		 1830}
1831
1832/* Return the section that should be marked against GC for a given
1833 relocation. */
1834
1835static asection *
55fd94b0 1836elf_i386_gc_mark_hook (asection *sec,
07adf181 1837 struct bfd_link_info *info,
55fd94b0
AM		 1838 Elf_Internal_Rela *rel,
1839 struct elf_link_hash_entry *h,
1840 Elf_Internal_Sym *sym)
252b5132
RH		 1841{
1842 if (h != NULL)
07adf181
AM		 1843 switch (ELF32_R_TYPE (rel->r_info))
1844 {
1845 case R_386_GNU_VTINHERIT:
1846 case R_386_GNU_VTENTRY:
1847 return NULL;
1848 }
1849
1850 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132
RH		 1851}
1852
1853/* Update the got entry reference counts for the section being removed. */
1854
b34976b6 1855static bfd_boolean
55fd94b0
AM		 1856elf_i386_gc_sweep_hook (bfd *abfd,
1857 struct bfd_link_info *info,
1858 asection *sec,
1859 const Elf_Internal_Rela *relocs)
252b5132 1860{
4dfe6ac6 1861 struct elf_i386_link_hash_table *htab;
dd5724d5
AM		 1862 Elf_Internal_Shdr *symtab_hdr;
1863 struct elf_link_hash_entry **sym_hashes;
1864 bfd_signed_vma *local_got_refcounts;
1865 const Elf_Internal_Rela *rel, *relend;
dd5724d5 1866
7dda2462
TG		 1867 if (info->relocatable)
1868 return TRUE;
1869
4dfe6ac6
NC		 1870 htab = elf_i386_hash_table (info);
1871 if (htab == NULL)
1872 return FALSE;
1873
ec338859 1874 elf_section_data (sec)->local_dynrel = NULL;
dd5724d5 1875
0ffa91dd 1876 symtab_hdr = &elf_symtab_hdr (abfd);
6725bdbf
AM		 1877 sym_hashes = elf_sym_hashes (abfd);
1878 local_got_refcounts = elf_local_got_refcounts (abfd);
dd5724d5
AM		 1879
1880 relend = relocs + sec->reloc_count;
1881 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 1882 {
1883 unsigned long r_symndx;
1884 unsigned int r_type;
1885 struct elf_link_hash_entry *h = NULL;
37e55690 1886
26e41594
AM		 1887 r_symndx = ELF32_R_SYM (rel->r_info);
1888 if (r_symndx >= symtab_hdr->sh_info)
1889 {
26e41594 1890 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 1891 while (h->root.type == bfd_link_hash_indirect
1892 || h->root.type == bfd_link_hash_warning)
1893 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 1894 }
bb1cb422
L		 1895 else
1896 {
1897 /* A local symbol. */
1898 Elf_Internal_Sym *isym;
1899
1900 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1901 abfd, r_symndx);
1902
1903 /* Check relocation against local STT_GNU_IFUNC symbol. */
1904 if (isym != NULL
1905 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1906 {
1907 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1908 if (h == NULL)
1909 abort ();
1910 }
1911 }
0c715baa 1912
3db2e7dd
L		 1913 if (h)
1914 {
1915 struct elf_i386_link_hash_entry *eh;
1916 struct elf_dyn_relocs **pp;
1917 struct elf_dyn_relocs *p;
1918
1919 eh = (struct elf_i386_link_hash_entry *) h;
1920 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1921 if (p->sec == sec)
1922 {
1923 /* Everything must go for SEC. */
1924 *pp = p->next;
1925 break;
1926 }
1927 }
1928
26e41594 1929 r_type = ELF32_R_TYPE (rel->r_info);
142411ca
L		 1930 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1931 symtab_hdr, sym_hashes,
1932 &r_type, GOT_UNKNOWN,
23209a78 1933 rel, relend, h, r_symndx))
142411ca
L		 1934 return FALSE;
1935
26e41594
AM		 1936 switch (r_type)
1937 {
1938 case R_386_TLS_LDM:
4dfe6ac6
NC		 1939 if (htab->tls_ldm_got.refcount > 0)
1940 htab->tls_ldm_got.refcount -= 1;
26e41594 1941 break;
0c715baa 1942
26e41594 1943 case R_386_TLS_GD:
67a4f2b7
AO		 1944 case R_386_TLS_GOTDESC:
1945 case R_386_TLS_DESC_CALL:
26e41594
AM		 1946 case R_386_TLS_IE_32:
1947 case R_386_TLS_IE:
1948 case R_386_TLS_GOTIE:
1949 case R_386_GOT32:
1950 if (h != NULL)
1951 {
1952 if (h->got.refcount > 0)
1953 h->got.refcount -= 1;
bb1cb422
L		 1954 if (h->type == STT_GNU_IFUNC)
1955 {
1956 if (h->plt.refcount > 0)
1957 h->plt.refcount -= 1;
1958 }
26e41594
AM		 1959 }
1960 else if (local_got_refcounts != NULL)
1961 {
1962 if (local_got_refcounts[r_symndx] > 0)
1963 local_got_refcounts[r_symndx] -= 1;
1964 }
1965 break;
0c715baa 1966
26e41594
AM		 1967 case R_386_32:
1968 case R_386_PC32:
1788fc08 1969 case R_386_SIZE32:
3db2e7dd
L		 1970 if (info->shared
1971 && (h == NULL || h->type != STT_GNU_IFUNC))
26e41594
AM		 1972 break;
1973 /* Fall through */
6725bdbf 1974
26e41594
AM		 1975 case R_386_PLT32:
1976 if (h != NULL)
1977 {
1978 if (h->plt.refcount > 0)
1979 h->plt.refcount -= 1;
1980 }
1981 break;
dd5724d5 1982
bb1cb422
L		 1983 case R_386_GOTOFF:
1984 if (h != NULL && h->type == STT_GNU_IFUNC)
1985 {
1986 if (h->got.refcount > 0)
1987 h->got.refcount -= 1;
1988 if (h->plt.refcount > 0)
1989 h->plt.refcount -= 1;
1990 }
1991 break;
1992
26e41594
AM		 1993 default:
1994 break;
1995 }
1996 }
252b5132 1997
b34976b6 1998 return TRUE;
252b5132
RH		 1999}
2000
2001/* Adjust a symbol defined by a dynamic object and referenced by a
2002 regular object. The current definition is in some section of the
2003 dynamic object, but we're not including those sections. We have to
2004 change the definition to something the rest of the link can
2005 understand. */
2006
b34976b6 2007static bfd_boolean
55fd94b0
AM		 2008elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2009 struct elf_link_hash_entry *h)
252b5132 2010{
6725bdbf 2011 struct elf_i386_link_hash_table *htab;
252b5132 2012 asection *s;
5ca5bb35
L		 2013 struct elf_i386_link_hash_entry *eh;
2014 struct elf_dyn_relocs *p;
252b5132 2015
cbe950e9
L		 2016 /* STT_GNU_IFUNC symbol must go through PLT. */
2017 if (h->type == STT_GNU_IFUNC)
2018 {
73bcf233
L		 2019 /* All local STT_GNU_IFUNC references must be treate as local
2020 calls via local PLT. */
5ca5bb35
L		 2021 if (h->ref_regular
2022 && SYMBOL_CALLS_LOCAL (info, h))
2023 {
73bcf233 2024 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L		 2025 struct elf_dyn_relocs **pp;
2026
2027 eh = (struct elf_i386_link_hash_entry *) h;
2028 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2029 {
2030 pc_count += p->pc_count;
2031 p->count -= p->pc_count;
2032 p->pc_count = 0;
73bcf233 2033 count += p->count;
5ca5bb35
L		 2034 if (p->count == 0)
2035 *pp = p->next;
2036 else
2037 pp = &p->next;
2038 }
2039
73bcf233 2040 if (pc_count || count)
5ca5bb35
L		 2041 {
2042 h->needs_plt = 1;
5ca5bb35 2043 h->non_got_ref = 1;
a5479e5f
L		 2044 if (h->plt.refcount <= 0)
2045 h->plt.refcount = 1;
2046 else
2047 h->plt.refcount += 1;
5ca5bb35
L		 2048 }
2049 }
2050
cbe950e9
L		 2051 if (h->plt.refcount <= 0)
2052 {
2053 h->plt.offset = (bfd_vma) -1;
2054 h->needs_plt = 0;
2055 }
2056 return TRUE;
2057 }
2058
252b5132
RH		 2059 /* If this is a function, put it in the procedure linkage table. We
2060 will fill in the contents of the procedure linkage table later,
2061 when we know the address of the .got section. */
2062 if (h->type == STT_FUNC
f5385ebf 2063 || h->needs_plt)
252b5132 2064 {
6725bdbf 2065 if (h->plt.refcount <= 0
9c7a29a3
AM		 2066 || SYMBOL_CALLS_LOCAL (info, h)
2067 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2068 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2069 {
2070 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM		 2071 file, but the symbol was never referred to by a dynamic
2072 object, or if all references were garbage collected. In
2073 such a case, we don't actually need to build a procedure
2074 linkage table, and we can just do a PC32 reloc instead. */
bbd7ec4a 2075 h->plt.offset = (bfd_vma) -1;
f5385ebf 2076 h->needs_plt = 0;
252b5132
RH		 2077 }
2078
b34976b6 2079 return TRUE;
252b5132 2080 }
6725bdbf
AM		 2081 else
2082 /* It's possible that we incorrectly decided a .plt reloc was
2083 needed for an R_386_PC32 reloc to a non-function sym in
2084 check_relocs. We can't decide accurately between function and
2085 non-function syms in check-relocs; Objects loaded later in
2086 the link may change h->type. So fix it now. */
bbd7ec4a 2087 h->plt.offset = (bfd_vma) -1;
252b5132
RH		 2088
2089 /* If this is a weak symbol, and there is a real definition, the
2090 processor independent code will have arranged for us to see the
2091 real definition first, and we can just use the same value. */
f6e332e6 2092 if (h->u.weakdef != NULL)
252b5132 2093 {
f6e332e6
AM		 2094 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2095 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2096 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2097 h->root.u.def.value = h->u.weakdef->root.u.def.value;
a23b6845 2098 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 2099 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 2100 return TRUE;
252b5132
RH		 2101 }
2102
2103 /* This is a reference to a symbol defined by a dynamic object which
2104 is not a function. */
2105
2106 /* If we are creating a shared library, we must presume that the
2107 only references to the symbol are via the global offset table.
2108 For such cases we need not do anything here; the relocations will
2109 be handled correctly by relocate_section. */
2110 if (info->shared)
b34976b6 2111 return TRUE;
252b5132 2112
7843f00e
ILT		 2113 /* If there are no references to this symbol that do not use the
2114 GOT, we don't need to generate a copy reloc. */
f5385ebf 2115 if (!h->non_got_ref)
b34976b6 2116 return TRUE;
7843f00e 2117
8bd621d8
AM		 2118 /* If -z nocopyreloc was given, we won't generate them either. */
2119 if (info->nocopyreloc)
2120 {
f5385ebf 2121 h->non_got_ref = 0;
b34976b6 2122 return TRUE;
8bd621d8
AM		 2123 }
2124
643796e3 2125 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 2126 if (htab == NULL)
2127 return FALSE;
643796e3
DJ		 2128
2129 /* If there aren't any dynamic relocs in read-only sections, then
2130 we can keep the dynamic relocs and avoid the copy reloc. This
2131 doesn't work on VxWorks, where we can not have dynamic relocations
2132 (other than copy and jump slot relocations) in an executable. */
23209a78
RM		 2133 if (ELIMINATE_COPY_RELOCS
2134 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
ebe50bae 2135 {
a23b6845
AM		 2136 eh = (struct elf_i386_link_hash_entry *) h;
2137 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2138 {
2139 s = p->sec->output_section;
2140 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2141 break;
2142 }
2143
a23b6845
AM		 2144 if (p == NULL)
2145 {
f5385ebf 2146 h->non_got_ref = 0;
a23b6845
AM		 2147 return TRUE;
2148 }
ebe50bae
AM		 2149 }
2150
252b5132
RH		 2151 /* We must allocate the symbol in our .dynbss section, which will
2152 become part of the .bss section of the executable. There will be
2153 an entry for this symbol in the .dynsym section. The dynamic
2154 object will contain position independent code, so all references
2155 from the dynamic object to this symbol will go through the global
2156 offset table. The dynamic linker will use the .dynsym entry to
2157 determine the address it must put in the global offset table, so
2158 both the dynamic object and the regular object will refer to the
2159 same memory location for the variable. */
2160
252b5132
RH		 2161 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2162 copy the initial value out of the dynamic object and into the
0ac8d2ca 2163 runtime process image. */
1d7e9d18 2164 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
252b5132 2165 {
eea6121a 2166 htab->srelbss->size += sizeof (Elf32_External_Rel);
f5385ebf 2167 h->needs_copy = 1;
252b5132
RH		 2168 }
2169
0ac8d2ca 2170 s = htab->sdynbss;
252b5132 2171
027297b7 2172 return _bfd_elf_adjust_dynamic_copy (h, s);
252b5132
RH		 2173}
2174
6725bdbf 2175/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 2176 dynamic relocs. */
6725bdbf 2177
b34976b6 2178static bfd_boolean
eb4ff4d6 2179elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 2180{
2181 struct bfd_link_info *info;
2182 struct elf_i386_link_hash_table *htab;
5a15f56f 2183 struct elf_i386_link_hash_entry *eh;
e03a8ed8 2184 struct elf_dyn_relocs *p;
25e762b9 2185 unsigned plt_entry_size;
6725bdbf 2186
e92d460e 2187 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2188 return TRUE;
6725bdbf 2189
cbe950e9 2190 eh = (struct elf_i386_link_hash_entry *) h;
e92d460e 2191
6725bdbf
AM		 2192 info = (struct bfd_link_info *) inf;
2193 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 2194 if (htab == NULL)
2195 return FALSE;
6725bdbf 2196
25e762b9
RM		 2197 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2198
cbe950e9
L		 2199 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2200 here if it is defined and referenced in a non-shared object. */
2201 if (h->type == STT_GNU_IFUNC
2202 && h->def_regular)
25e762b9
RM		 2203 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2204 plt_entry_size, 4);
cbe950e9
L		 2205 else if (htab->elf.dynamic_sections_created
2206 && h->plt.refcount > 0)
6725bdbf 2207 {
5a15f56f
AM		 2208 /* Make sure this symbol is output as a dynamic symbol.
2209 Undefined weak syms won't yet be marked as dynamic. */
2210 if (h->dynindx == -1
f5385ebf 2211 && !h->forced_local)
5a15f56f 2212 {
c152c796 2213 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2214 return FALSE;
5a15f56f
AM		 2215 }
2216
4e795f50
AM		 2217 if (info->shared
2218 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 2219 {
6de2ae4a 2220 asection *s = htab->elf.splt;
6725bdbf 2221
ced53ee5
AM		 2222 /* If this is the first .plt entry, make room for the special
2223 first entry. */
eea6121a 2224 if (s->size == 0)
25e762b9 2225 s->size += plt_entry_size;
6725bdbf 2226
eea6121a 2227 h->plt.offset = s->size;
6725bdbf 2228
ced53ee5
AM		 2229 /* If this symbol is not defined in a regular file, and we are
2230 not generating a shared library, then set the symbol to this
2231 location in the .plt. This is required to make function
2232 pointers compare as equal between the normal executable and
2233 the shared library. */
2234 if (! info->shared
f5385ebf 2235 && !h->def_regular)
ced53ee5
AM		 2236 {
2237 h->root.u.def.section = s;
2238 h->root.u.def.value = h->plt.offset;
2239 }
6725bdbf 2240
ced53ee5 2241 /* Make room for this entry. */
25e762b9 2242 s->size += plt_entry_size;
6725bdbf 2243
ced53ee5
AM		 2244 /* We also need to make an entry in the .got.plt section, which
2245 will be placed in the .got section by the linker script. */
6de2ae4a 2246 htab->elf.sgotplt->size += 4;
6725bdbf 2247
6725bdbf 2248 /* We also need to make an entry in the .rel.plt section. */
6de2ae4a 2249 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
e1f98742 2250 htab->elf.srelplt->reloc_count++;
eac338cf 2251
23209a78
RM		 2252 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2253 && !info->shared)
eac338cf
PB		 2254 {
2255 /* VxWorks has a second set of relocations for each PLT entry
2256 in executables. They go in a separate relocation section,
2257 which is processed by the kernel loader. */
2258
2259 /* There are two relocations for the initial PLT entry: an
2260 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2261 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2262
25e762b9 2263 if (h->plt.offset == plt_entry_size)
eac338cf
PB		 2264 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2265
2266 /* There are two extra relocations for each subsequent PLT entry:
2267 an R_386_32 relocation for the GOT entry, and an R_386_32
2268 relocation for the PLT entry. */
2269
2270 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2271 }
6725bdbf 2272 }
ced53ee5
AM		 2273 else
2274 {
51b64d56 2275 h->plt.offset = (bfd_vma) -1;
f5385ebf 2276 h->needs_plt = 0;
ced53ee5 2277 }
6725bdbf
AM		 2278 }
2279 else
2280 {
51b64d56 2281 h->plt.offset = (bfd_vma) -1;
f5385ebf 2282 h->needs_plt = 0;
6725bdbf
AM		 2283 }
2284
67a4f2b7
AO		 2285 eh->tlsdesc_got = (bfd_vma) -1;
2286
37e55690 2287 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 2288 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2289 if (h->got.refcount > 0
1d85728f 2290 && info->executable
13ae64f3 2291 && h->dynindx == -1
37e55690 2292 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
cedb70c5 2293 h->got.offset = (bfd_vma) -1;
13ae64f3 2294 else if (h->got.refcount > 0)
6725bdbf 2295 {
0ac8d2ca 2296 asection *s;
b34976b6 2297 bfd_boolean dyn;
13ae64f3 2298 int tls_type = elf_i386_hash_entry(h)->tls_type;
6725bdbf 2299
5a15f56f
AM		 2300 /* Make sure this symbol is output as a dynamic symbol.
2301 Undefined weak syms won't yet be marked as dynamic. */
2302 if (h->dynindx == -1
f5385ebf 2303 && !h->forced_local)
5a15f56f 2304 {
c152c796 2305 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2306 return FALSE;
5a15f56f
AM		 2307 }
2308
6de2ae4a 2309 s = htab->elf.sgot;
67a4f2b7
AO		 2310 if (GOT_TLS_GDESC_P (tls_type))
2311 {
6de2ae4a 2312 eh->tlsdesc_got = htab->elf.sgotplt->size
67a4f2b7 2313 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2314 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 2315 h->got.offset = (bfd_vma) -2;
2316 }
2317 if (! GOT_TLS_GDESC_P (tls_type)
2318 || GOT_TLS_GD_P (tls_type))
2319 {
2320 h->got.offset = s->size;
2321 s->size += 4;
2322 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2323 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2324 s->size += 4;
2325 }
ebe50bae 2326 dyn = htab->elf.dynamic_sections_created;
13ae64f3 2327 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 2328 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2329 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2330 need two), R_386_TLS_GD needs one if local symbol and two if
2331 global. */
2332 if (tls_type == GOT_TLS_IE_BOTH)
6de2ae4a 2333 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 2334 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
37e55690 2335 || (tls_type & GOT_TLS_IE))
6de2ae4a 2336 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2337 else if (GOT_TLS_GD_P (tls_type))
6de2ae4a 2338 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 2339 else if (! GOT_TLS_GDESC_P (tls_type)
2340 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2341 || h->root.type != bfd_link_hash_undefweak)
ef5aade5
L		 2342 && (info->shared
2343 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6de2ae4a 2344 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 2345 if (GOT_TLS_GDESC_P (tls_type))
6de2ae4a 2346 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 2347 }
2348 else
51b64d56 2349 h->got.offset = (bfd_vma) -1;
6725bdbf 2350
5a15f56f 2351 if (eh->dyn_relocs == NULL)
b34976b6 2352 return TRUE;
5a15f56f 2353
0c715baa
AM		 2354 /* In the shared -Bsymbolic case, discard space allocated for
2355 dynamic pc-relative relocs against symbols which turn out to be
2356 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 2357 space for pc-relative relocs that have become local due to symbol
2358 visibility changes. */
0c715baa
AM		 2359
2360 if (info->shared)
5a15f56f 2361 {
09695f56
AM		 2362 /* The only reloc that uses pc_count is R_386_PC32, which will
2363 appear on a call or on something like ".long foo - .". We
2364 want calls to protected symbols to resolve directly to the
2365 function rather than going via the plt. If people want
2366 function pointer comparisons to work as expected then they
2367 should avoid writing assembly like ".long foo - .". */
2368 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 2369 {
e03a8ed8 2370 struct elf_dyn_relocs **pp;
0c715baa
AM		 2371
2372 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2373 {
2374 p->count -= p->pc_count;
2375 p->pc_count = 0;
2376 if (p->count == 0)
2377 *pp = p->next;
2378 else
2379 pp = &p->next;
2380 }
5a15f56f 2381 }
4e795f50 2382
23209a78 2383 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
3348747a 2384 {
e03a8ed8 2385 struct elf_dyn_relocs **pp;
3348747a
NS		 2386 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2387 {
2388 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2389 *pp = p->next;
2390 else
2391 pp = &p->next;
2392 }
2393 }
2394
4e795f50 2395 /* Also discard relocs on undefined weak syms with non-default
3348747a 2396 visibility. */
22d606e9 2397 if (eh->dyn_relocs != NULL
4e795f50 2398 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM		 2399 {
2400 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2401 eh->dyn_relocs = NULL;
2402
2403 /* Make sure undefined weak symbols are output as a dynamic
2404 symbol in PIEs. */
2405 else if (h->dynindx == -1
2406 && !h->forced_local)
2407 {
2408 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2409 return FALSE;
2410 }
2411 }
0c715baa 2412 }
a23b6845 2413 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 2414 {
2415 /* For the non-shared case, discard space for relocs against
2416 symbols which turn out to need copy relocs or are not
2417 dynamic. */
2418
f5385ebf
AM		 2419 if (!h->non_got_ref
2420 && ((h->def_dynamic
2421 && !h->def_regular)
ebe50bae 2422 || (htab->elf.dynamic_sections_created
0c715baa
AM		 2423 && (h->root.type == bfd_link_hash_undefweak
2424 || h->root.type == bfd_link_hash_undefined))))
2425 {
2426 /* Make sure this symbol is output as a dynamic symbol.
2427 Undefined weak syms won't yet be marked as dynamic. */
2428 if (h->dynindx == -1
f5385ebf 2429 && !h->forced_local)
0c715baa 2430 {
c152c796 2431 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2432 return FALSE;
0c715baa 2433 }
5a15f56f 2434
0c715baa
AM		 2435 /* If that succeeded, we know we'll be keeping all the
2436 relocs. */
2437 if (h->dynindx != -1)
2438 goto keep;
2439 }
2440
2441 eh->dyn_relocs = NULL;
2442
ec338859 2443 keep: ;
5a15f56f
AM		 2444 }
2445
0c715baa
AM		 2446 /* Finally, allocate space. */
2447 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 2448 {
e7c33416
NC		 2449 asection *sreloc;
2450
cbe950e9 2451 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2452
2453 BFD_ASSERT (sreloc != NULL);
eea6121a 2454 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 2455 }
2456
b34976b6 2457 return TRUE;
6725bdbf
AM		 2458}
2459
c25bc9fc
L		 2460/* Allocate space in .plt, .got and associated reloc sections for
2461 local dynamic relocs. */
2462
2463static bfd_boolean
2464elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2465{
2466 struct elf_link_hash_entry *h
2467 = (struct elf_link_hash_entry *) *slot;
2468
2469 if (h->type != STT_GNU_IFUNC
2470 || !h->def_regular
2471 || !h->ref_regular
2472 || !h->forced_local
2473 || h->root.type != bfd_link_hash_defined)
2474 abort ();
2475
2476 return elf_i386_allocate_dynrelocs (h, inf);
2477}
2478
0c715baa
AM		 2479/* Find any dynamic relocs that apply to read-only sections. */
2480
b34976b6 2481static bfd_boolean
eb4ff4d6 2482elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
0c715baa
AM		 2483{
2484 struct elf_i386_link_hash_entry *eh;
e03a8ed8 2485 struct elf_dyn_relocs *p;
0c715baa 2486
aa715242
L		 2487 /* Skip local IFUNC symbols. */
2488 if (h->forced_local && h->type == STT_GNU_IFUNC)
2489 return TRUE;
2490
0c715baa
AM		 2491 eh = (struct elf_i386_link_hash_entry *) h;
2492 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2493 {
2494 asection *s = p->sec->output_section;
2495
2496 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2497 {
2498 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2499
2500 info->flags |= DF_TEXTREL;
2501
b70321a2
L		 2502 if (info->warn_shared_textrel && info->shared)
2503 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2504 p->sec->owner, h->root.root.string,
2505 p->sec);
2506
0c715baa 2507 /* Not an error, just cut short the traversal. */
b34976b6 2508 return FALSE;
0c715baa
AM		 2509 }
2510 }
b34976b6 2511 return TRUE;
0c715baa
AM		 2512}
2513
daa67607
L		 2514/* Convert
2515 mov foo@GOT(%reg), %reg
2516 to
2517 lea foo@GOTOFF(%reg), %reg
2518 with the local symbol, foo. */
2519
2520static bfd_boolean
2521elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2522 struct bfd_link_info *link_info)
2523{
2524 Elf_Internal_Shdr *symtab_hdr;
2525 Elf_Internal_Rela *internal_relocs;
2526 Elf_Internal_Rela *irel, *irelend;
2527 bfd_byte *contents;
2528 struct elf_i386_link_hash_table *htab;
2529 bfd_boolean changed_contents;
2530 bfd_boolean changed_relocs;
2531 bfd_signed_vma *local_got_refcounts;
2532
2533 /* Don't even try to convert non-ELF outputs. */
2534 if (!is_elf_hash_table (link_info->hash))
2535 return FALSE;
2536
fbdc86d9 2537 /* Nothing to do if there are no codes, no relocations or no output. */
daa67607 2538 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
fbdc86d9
L		 2539 || sec->reloc_count == 0
2540 || discarded_section (sec))
daa67607
L		 2541 return TRUE;
2542
2543 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2544
2545 /* Load the relocations for this section. */
2546 internal_relocs = (_bfd_elf_link_read_relocs
2547 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2548 link_info->keep_memory));
2549 if (internal_relocs == NULL)
2550 return FALSE;
2551
2552 htab = elf_i386_hash_table (link_info);
2553 changed_contents = FALSE;
2554 changed_relocs = FALSE;
2555 local_got_refcounts = elf_local_got_refcounts (abfd);
2556
2557 /* Get the section contents. */
2558 if (elf_section_data (sec)->this_hdr.contents != NULL)
2559 contents = elf_section_data (sec)->this_hdr.contents;
2560 else
2561 {
2562 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2563 goto error_return;
2564 }
2565
2566 irelend = internal_relocs + sec->reloc_count;
2567 for (irel = internal_relocs; irel < irelend; irel++)
2568 {
2569 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2570 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2571 unsigned int indx;
2572 struct elf_link_hash_entry *h;
2573
2574 if (r_type != R_386_GOT32)
2575 continue;
2576
2577 /* Get the symbol referred to by the reloc. */
2578 if (r_symndx < symtab_hdr->sh_info)
2579 {
2580 Elf_Internal_Sym *isym;
2581
2582 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2583 abfd, r_symndx);
2584
2585 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2586 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2587 && bfd_get_8 (input_bfd,
2588 contents + irel->r_offset - 2) == 0x8b)
2589 {
2590 bfd_put_8 (output_bfd, 0x8d,
2591 contents + irel->r_offset - 2);
2592 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2593 if (local_got_refcounts != NULL
2594 && local_got_refcounts[r_symndx] > 0)
2595 local_got_refcounts[r_symndx] -= 1;
2596 changed_contents = TRUE;
2597 changed_relocs = TRUE;
2598 }
2599 continue;
2600 }
2601
2602 indx = r_symndx - symtab_hdr->sh_info;
2603 h = elf_sym_hashes (abfd)[indx];
2604 BFD_ASSERT (h != NULL);
2605
2606 while (h->root.type == bfd_link_hash_indirect
2607 || h->root.type == bfd_link_hash_warning)
2608 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2609
3f65f599
L		 2610 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2611 optimizing _DYNAMIC since ld.so may use its link-time address. */
daa67607
L		 2612 if (h->def_regular
2613 && h->type != STT_GNU_IFUNC
9637f6ef 2614 && h != htab->elf.hdynamic
daa67607
L		 2615 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2616 && bfd_get_8 (input_bfd,
2617 contents + irel->r_offset - 2) == 0x8b)
2618 {
2619 bfd_put_8 (output_bfd, 0x8d,
2620 contents + irel->r_offset - 2);
2621 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2622 if (h->got.refcount > 0)
2623 h->got.refcount -= 1;
2624 changed_contents = TRUE;
2625 changed_relocs = TRUE;
2626 }
2627 }
2628
2629 if (contents != NULL
2630 && elf_section_data (sec)->this_hdr.contents != contents)
2631 {
2632 if (!changed_contents && !link_info->keep_memory)
2633 free (contents);
2634 else
2635 {
2636 /* Cache the section contents for elf_link_input_bfd. */
2637 elf_section_data (sec)->this_hdr.contents = contents;
2638 }
2639 }
2640
2641 if (elf_section_data (sec)->relocs != internal_relocs)
2642 {
2643 if (!changed_relocs)
2644 free (internal_relocs);
2645 else
2646 elf_section_data (sec)->relocs = internal_relocs;
2647 }
2648
2649 return TRUE;
2650
2651 error_return:
2652 if (contents != NULL
2653 && elf_section_data (sec)->this_hdr.contents != contents)
2654 free (contents);
2655 if (internal_relocs != NULL
2656 && elf_section_data (sec)->relocs != internal_relocs)
2657 free (internal_relocs);
2658 return FALSE;
2659}
2660
252b5132
RH		 2661/* Set the sizes of the dynamic sections. */
2662
b34976b6 2663static bfd_boolean
23209a78 2664elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
252b5132 2665{
6725bdbf 2666 struct elf_i386_link_hash_table *htab;
252b5132
RH		 2667 bfd *dynobj;
2668 asection *s;
b34976b6 2669 bfd_boolean relocs;
0c715baa 2670 bfd *ibfd;
252b5132 2671
6725bdbf 2672 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 2673 if (htab == NULL)
2674 return FALSE;
ebe50bae 2675 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 2676 if (dynobj == NULL)
2677 abort ();
252b5132 2678
ebe50bae 2679 if (htab->elf.dynamic_sections_created)
252b5132
RH		 2680 {
2681 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 2682 if (info->executable)
252b5132 2683 {
3d4d4302 2684 s = bfd_get_linker_section (dynobj, ".interp");
ffb2e45b
AM		 2685 if (s == NULL)
2686 abort ();
eea6121a 2687 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132
RH		 2688 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2689 }
161d71a6 2690 }
6725bdbf 2691
0c715baa
AM		 2692 /* Set up .got offsets for local syms, and space for local dynamic
2693 relocs. */
2694 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
161d71a6
L		 2695 {
2696 bfd_signed_vma *local_got;
2697 bfd_signed_vma *end_local_got;
13ae64f3 2698 char *local_tls_type;
67a4f2b7 2699 bfd_vma *local_tlsdesc_gotent;
161d71a6
L		 2700 bfd_size_type locsymcount;
2701 Elf_Internal_Shdr *symtab_hdr;
2702 asection *srel;
6725bdbf 2703
0ffa91dd 2704 if (! is_i386_elf (ibfd))
161d71a6 2705 continue;
6725bdbf 2706
0c715baa
AM		 2707 for (s = ibfd->sections; s != NULL; s = s->next)
2708 {
e03a8ed8 2709 struct elf_dyn_relocs *p;
0c715baa 2710
daa67607
L		 2711 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2712 return FALSE;
2713
e03a8ed8 2714 for (p = ((struct elf_dyn_relocs *)
e81d3500 2715 elf_section_data (s)->local_dynrel);
ec338859
AM		 2716 p != NULL;
2717 p = p->next)
0c715baa 2718 {
ec338859
AM		 2719 if (!bfd_is_abs_section (p->sec)
2720 && bfd_is_abs_section (p->sec->output_section))
2721 {
2722 /* Input section has been discarded, either because
2723 it is a copy of a linkonce section or due to
2724 linker script /DISCARD/, so we'll be discarding
2725 the relocs too. */
2726 }
23209a78 2727 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3348747a
NS		 2728 && strcmp (p->sec->output_section->name,
2729 ".tls_vars") == 0)
2730 {
2731 /* Relocations in vxworks .tls_vars sections are
2732 handled specially by the loader. */
2733 }
248866a8 2734 else if (p->count != 0)
ec338859
AM		 2735 {
2736 srel = elf_section_data (p->sec)->sreloc;
eea6121a 2737 srel->size += p->count * sizeof (Elf32_External_Rel);
4b819e1f
L		 2738 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2739 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 2740 {
2741 info->flags |= DF_TEXTREL;
2742 if (info->warn_shared_textrel && info->shared)
2743 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2744 p->sec->owner, p->sec);
b70321a2 2745 }
ec338859 2746 }
0c715baa
AM		 2747 }
2748 }
2749
2750 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 2751 if (!local_got)
2752 continue;
6725bdbf 2753
0ffa91dd 2754 symtab_hdr = &elf_symtab_hdr (ibfd);
161d71a6
L		 2755 locsymcount = symtab_hdr->sh_info;
2756 end_local_got = local_got + locsymcount;
13ae64f3 2757 local_tls_type = elf_i386_local_got_tls_type (ibfd);
67a4f2b7 2758 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 2759 s = htab->elf.sgot;
2760 srel = htab->elf.srelgot;
67a4f2b7
AO		 2761 for (; local_got < end_local_got;
2762 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
161d71a6 2763 {
67a4f2b7 2764 *local_tlsdesc_gotent = (bfd_vma) -1;
161d71a6 2765 if (*local_got > 0)
6725bdbf 2766 {
67a4f2b7
AO		 2767 if (GOT_TLS_GDESC_P (*local_tls_type))
2768 {
6de2ae4a 2769 *local_tlsdesc_gotent = htab->elf.sgotplt->size
67a4f2b7 2770 - elf_i386_compute_jump_table_size (htab);
6de2ae4a 2771 htab->elf.sgotplt->size += 8;
67a4f2b7
AO		 2772 *local_got = (bfd_vma) -2;
2773 }
2774 if (! GOT_TLS_GDESC_P (*local_tls_type)
2775 || GOT_TLS_GD_P (*local_tls_type))
2776 {
2777 *local_got = s->size;
2778 s->size += 4;
2779 if (GOT_TLS_GD_P (*local_tls_type)
2780 || *local_tls_type == GOT_TLS_IE_BOTH)
2781 s->size += 4;
2782 }
13ae64f3 2783 if (info->shared
67a4f2b7 2784 || GOT_TLS_GD_ANY_P (*local_tls_type)
37e55690
JJ		 2785 || (*local_tls_type & GOT_TLS_IE))
2786 {
2787 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 2788 srel->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 2789 else if (GOT_TLS_GD_P (*local_tls_type)
2790 || ! GOT_TLS_GDESC_P (*local_tls_type))
eea6121a 2791 srel->size += sizeof (Elf32_External_Rel);
67a4f2b7 2792 if (GOT_TLS_GDESC_P (*local_tls_type))
6de2ae4a 2793 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
37e55690 2794 }
6725bdbf 2795 }
161d71a6
L		 2796 else
2797 *local_got = (bfd_vma) -1;
6725bdbf 2798 }
252b5132 2799 }
6725bdbf 2800
13ae64f3
JJ		 2801 if (htab->tls_ldm_got.refcount > 0)
2802 {
2803 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2804 relocs. */
6de2ae4a
L		 2805 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2806 htab->elf.sgot->size += 8;
2807 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 2808 }
2809 else
2810 htab->tls_ldm_got.offset = -1;
2811
0c715baa
AM		 2812 /* Allocate global sym .plt and .got entries, and space for global
2813 sym dynamic relocs. */
eb4ff4d6 2814 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
252b5132 2815
c25bc9fc
L		 2816 /* Allocate .plt and .got entries, and space for local symbols. */
2817 htab_traverse (htab->loc_hash_table,
2818 elf_i386_allocate_local_dynrelocs,
2819 info);
2820
67a4f2b7
AO		 2821 /* For every jump slot reserved in the sgotplt, reloc_count is
2822 incremented. However, when we reserve space for TLS descriptors,
2823 it's not incremented, so in order to compute the space reserved
2824 for them, it suffices to multiply the reloc count by the jump
e1f98742 2825 slot size.
caa0075c 2826
e1f98742
L		 2827 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2828 so that R_386_IRELATIVE entries come last. */
6de2ae4a 2829 if (htab->elf.srelplt)
e1f98742
L		 2830 {
2831 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2832 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2833 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2834 }
2835 else if (htab->elf.irelplt)
2836 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2837
67a4f2b7 2838
a7b16ceb
L		 2839 if (htab->elf.sgotplt)
2840 {
2841 /* Don't allocate .got.plt section if there are no GOT nor PLT
9a2a56cc 2842 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 2843 if ((htab->elf.hgot == NULL
2844 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 2845 && (htab->elf.sgotplt->size
2846 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 2847 && (htab->elf.splt == NULL
2848 || htab->elf.splt->size == 0)
2849 && (htab->elf.sgot == NULL
2850 || htab->elf.sgot->size == 0)
2851 && (htab->elf.iplt == NULL
2852 || htab->elf.iplt->size == 0)
2853 && (htab->elf.igotplt == NULL
2854 || htab->elf.igotplt->size == 0))
2855 htab->elf.sgotplt->size = 0;
2856 }
2857
9a2a56cc
AM		 2858
2859 if (htab->plt_eh_frame != NULL
2860 && htab->elf.splt != NULL
2861 && htab->elf.splt->size != 0
2862 && !bfd_is_abs_section (htab->elf.splt->output_section)
2863 && _bfd_elf_eh_frame_present (info))
2864 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
2865
5a15f56f
AM		 2866 /* We now have determined the sizes of the various dynamic sections.
2867 Allocate memory for them. */
b34976b6 2868 relocs = FALSE;
252b5132
RH		 2869 for (s = dynobj->sections; s != NULL; s = s->next)
2870 {
eac338cf
PB		 2871 bfd_boolean strip_section = TRUE;
2872
252b5132
RH		 2873 if ((s->flags & SEC_LINKER_CREATED) == 0)
2874 continue;
2875
6de2ae4a 2876 if (s == htab->elf.splt
9a2a56cc 2877 || s == htab->elf.sgot)
252b5132 2878 {
6725bdbf
AM		 2879 /* Strip this section if we don't need it; see the
2880 comment below. */
eac338cf
PB		 2881 /* We'd like to strip these sections if they aren't needed, but if
2882 we've exported dynamic symbols from them we must leave them.
2883 It's too late to tell BFD to get rid of the symbols. */
2884
7325306f 2885 if (htab->elf.hplt != NULL)
eac338cf 2886 strip_section = FALSE;
252b5132 2887 }
9a2a56cc
AM		 2888 else if (s == htab->elf.sgotplt
2889 || s == htab->elf.iplt
2890 || s == htab->elf.igotplt
2891 || s == htab->plt_eh_frame
2892 || s == htab->sdynbss)
2893 {
2894 /* Strip these too. */
2895 }
0112cd26 2896 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
252b5132 2897 {
6de2ae4a
L		 2898 if (s->size != 0
2899 && s != htab->elf.srelplt
2900 && s != htab->srelplt2)
b34976b6 2901 relocs = TRUE;
252b5132 2902
0ac8d2ca
AM		 2903 /* We use the reloc_count field as a counter if we need
2904 to copy relocs into the output file. */
5ae0bfb6 2905 s->reloc_count = 0;
252b5132 2906 }
6725bdbf 2907 else
252b5132
RH		 2908 {
2909 /* It's not one of our sections, so don't allocate space. */
2910 continue;
2911 }
2912
c456f082 2913 if (s->size == 0)
252b5132 2914 {
0ac8d2ca
AM		 2915 /* If we don't need this section, strip it from the
2916 output file. This is mostly to handle .rel.bss and
2917 .rel.plt. We must create both sections in
2918 create_dynamic_sections, because they must be created
2919 before the linker maps input sections to output
2920 sections. The linker does that before
2921 adjust_dynamic_symbol is called, and it is that
2922 function which decides whether anything needs to go
2923 into these sections. */
c456f082
AM		 2924 if (strip_section)
2925 s->flags |= SEC_EXCLUDE;
252b5132
RH		 2926 continue;
2927 }
2928
c456f082
AM		 2929 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2930 continue;
2931
f69da49f
AM		 2932 /* Allocate memory for the section contents. We use bfd_zalloc
2933 here in case unused entries are not reclaimed before the
2934 section's contents are written out. This should not happen,
2935 but this way if it does, we get a R_386_NONE reloc instead
2936 of garbage. */
a50b1753 2937 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
6725bdbf 2938 if (s->contents == NULL)
b34976b6 2939 return FALSE;
252b5132
RH		 2940 }
2941
e41b3a13 2942 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 2943 && htab->plt_eh_frame->contents != NULL)
2944 {
2945 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
2946 sizeof (elf_i386_eh_frame_plt));
2947 bfd_put_32 (dynobj, htab->elf.splt->size,
2948 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2949 }
e41b3a13 2950
ebe50bae 2951 if (htab->elf.dynamic_sections_created)
252b5132
RH		 2952 {
2953 /* Add some entries to the .dynamic section. We fill in the
2954 values later, in elf_i386_finish_dynamic_sections, but we
2955 must add the entries now so that we get the correct size for
2956 the .dynamic section. The DT_DEBUG entry is filled in by the
2957 dynamic linker and used by the debugger. */
dc810e39 2958#define add_dynamic_entry(TAG, VAL) \
5a580b3a 2959 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 2960
36af4a4e 2961 if (info->executable)
252b5132 2962 {
dc810e39 2963 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2964 return FALSE;
252b5132
RH		 2965 }
2966
6de2ae4a 2967 if (htab->elf.splt->size != 0)
252b5132 2968 {
dc810e39
AM		 2969 if (!add_dynamic_entry (DT_PLTGOT, 0)
2970 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2971 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2972 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 2973 return FALSE;
252b5132
RH		 2974 }
2975
2976 if (relocs)
2977 {
dc810e39
AM		 2978 if (!add_dynamic_entry (DT_REL, 0)
2979 || !add_dynamic_entry (DT_RELSZ, 0)
2980 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 2981 return FALSE;
252b5132 2982
0c715baa
AM		 2983 /* If any dynamic relocs apply to a read-only section,
2984 then we need a DT_TEXTREL entry. */
248866a8 2985 if ((info->flags & DF_TEXTREL) == 0)
eb4ff4d6
L		 2986 elf_link_hash_traverse (&htab->elf,
2987 elf_i386_readonly_dynrelocs, info);
0c715baa
AM		 2988
2989 if ((info->flags & DF_TEXTREL) != 0)
2990 {
2991 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2992 return FALSE;
0c715baa 2993 }
252b5132 2994 }
23209a78 2995 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
7a2b07ff
NS		 2996 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2997 return FALSE;
252b5132 2998 }
dc810e39 2999#undef add_dynamic_entry
252b5132 3000
b34976b6 3001 return TRUE;
252b5132
RH		 3002}
3003
67a4f2b7
AO		 3004static bfd_boolean
3005elf_i386_always_size_sections (bfd *output_bfd,
3006 struct bfd_link_info *info)
3007{
3008 asection *tls_sec = elf_hash_table (info)->tls_sec;
3009
3010 if (tls_sec)
3011 {
3012 struct elf_link_hash_entry *tlsbase;
3013
3014 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3015 "_TLS_MODULE_BASE_",
3016 FALSE, FALSE, FALSE);
3017
3018 if (tlsbase && tlsbase->type == STT_TLS)
3019 {
4dfe6ac6 3020 struct elf_i386_link_hash_table *htab;
67a4f2b7
AO		 3021 struct bfd_link_hash_entry *bh = NULL;
3022 const struct elf_backend_data *bed
3023 = get_elf_backend_data (output_bfd);
3024
4dfe6ac6
NC		 3025 htab = elf_i386_hash_table (info);
3026 if (htab == NULL)
3027 return FALSE;
3028
67a4f2b7
AO		 3029 if (!(_bfd_generic_link_add_one_symbol
3030 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3031 tls_sec, 0, NULL, FALSE,
3032 bed->collect, &bh)))
3033 return FALSE;
9f03412a 3034
4dfe6ac6 3035 htab->tls_module_base = bh;
9f03412a 3036
67a4f2b7
AO		 3037 tlsbase = (struct elf_link_hash_entry *)bh;
3038 tlsbase->def_regular = 1;
3039 tlsbase->other = STV_HIDDEN;
3040 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3041 }
3042 }
3043
3044 return TRUE;
3045}
3046
38701953
AM		 3047/* Set the correct type for an x86 ELF section. We do this by the
3048 section name, which is a hack, but ought to work. */
3049
b34976b6 3050static bfd_boolean
55fd94b0
AM		 3051elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3052 Elf_Internal_Shdr *hdr,
3053 asection *sec)
38701953 3054{
91d6fa6a 3055 const char *name;
38701953
AM		 3056
3057 name = bfd_get_section_name (abfd, sec);
3058
3059 /* This is an ugly, but unfortunately necessary hack that is
3060 needed when producing EFI binaries on x86. It tells
3061 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3062 containing ELF relocation info. We need this hack in order to
3063 be able to generate ELF binaries that can be translated into
3064 EFI applications (which are essentially COFF objects). Those
3065 files contain a COFF ".reloc" section inside an ELFNN object,
3066 which would normally cause BFD to segfault because it would
3067 attempt to interpret this section as containing relocation
3068 entries for section "oc". With this hack enabled, ".reloc"
3069 will be treated as a normal data section, which will avoid the
3070 segfault. However, you won't be able to create an ELFNN binary
3071 with a section named "oc" that needs relocations, but that's
3072 the kind of ugly side-effects you get when detecting section
3073 types based on their names... In practice, this limitation is
3074 unlikely to bite. */
3075 if (strcmp (name, ".reloc") == 0)
3076 hdr->sh_type = SHT_PROGBITS;
3077
b34976b6 3078 return TRUE;
38701953
AM		 3079}
3080
9f03412a
AO		 3081/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3082 executables. Rather than setting it to the beginning of the TLS
3083 section, we have to set it to the end. This function may be called
3084 multiple times, it is idempotent. */
3085
3086static void
eb4ff4d6 3087elf_i386_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3088{
4dfe6ac6 3089 struct elf_i386_link_hash_table *htab;
9f03412a
AO		 3090 struct bfd_link_hash_entry *base;
3091
3092 if (!info->executable)
3093 return;
3094
4dfe6ac6
NC		 3095 htab = elf_i386_hash_table (info);
3096 if (htab == NULL)
3097 return;
9f03412a 3098
4dfe6ac6
NC		 3099 base = htab->tls_module_base;
3100 if (base == NULL)
9f03412a
AO		 3101 return;
3102
4dfe6ac6 3103 base->u.def.value = htab->elf.tls_size;
9f03412a
AO		 3104}
3105
13ae64f3
JJ		 3106/* Return the base VMA address which should be subtracted from real addresses
3107 when resolving @dtpoff relocation.
3108 This is PT_TLS segment p_vaddr. */
3109
3110static bfd_vma
eb4ff4d6 3111elf_i386_dtpoff_base (struct bfd_link_info *info)
13ae64f3 3112{
e1918d23
AM		 3113 /* If tls_sec is NULL, we should have signalled an error already. */
3114 if (elf_hash_table (info)->tls_sec == NULL)
6a30718d 3115 return 0;
e1918d23 3116 return elf_hash_table (info)->tls_sec->vma;
13ae64f3
JJ		 3117}
3118
3119/* Return the relocation value for @tpoff relocation
3120 if STT_TLS virtual address is ADDRESS. */
3121
3122static bfd_vma
eb4ff4d6 3123elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 3124{
e1918d23 3125 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3126 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3127 bfd_vma static_tls_size;
13ae64f3 3128
e1918d23
AM		 3129 /* If tls_sec is NULL, we should have signalled an error already. */
3130 if (htab->tls_sec == NULL)
6a30718d 3131 return 0;
7dc98aea
RO		 3132
3133 /* Consider special static TLS alignment requirements. */
3134 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3135 return static_tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 3136}
3137
252b5132
RH		 3138/* Relocate an i386 ELF section. */
3139
b34976b6 3140static bfd_boolean
55fd94b0
AM		 3141elf_i386_relocate_section (bfd *output_bfd,
3142 struct bfd_link_info *info,
3143 bfd *input_bfd,
3144 asection *input_section,
3145 bfd_byte *contents,
3146 Elf_Internal_Rela *relocs,
3147 Elf_Internal_Sym *local_syms,
3148 asection **local_sections)
252b5132 3149{
6725bdbf 3150 struct elf_i386_link_hash_table *htab;
252b5132
RH		 3151 Elf_Internal_Shdr *symtab_hdr;
3152 struct elf_link_hash_entry **sym_hashes;
3153 bfd_vma *local_got_offsets;
67a4f2b7 3154 bfd_vma *local_tlsdesc_gotents;
252b5132
RH		 3155 Elf_Internal_Rela *rel;
3156 Elf_Internal_Rela *relend;
3348747a 3157 bfd_boolean is_vxworks_tls;
25e762b9 3158 unsigned plt_entry_size;
252b5132 3159
0ffa91dd 3160 BFD_ASSERT (is_i386_elf (input_bfd));
6bbec505 3161
6725bdbf 3162 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 3163 if (htab == NULL)
3164 return FALSE;
0ffa91dd 3165 symtab_hdr = &elf_symtab_hdr (input_bfd);
252b5132
RH		 3166 sym_hashes = elf_sym_hashes (input_bfd);
3167 local_got_offsets = elf_local_got_offsets (input_bfd);
67a4f2b7 3168 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3348747a
NS		 3169 /* We have to handle relocations in vxworks .tls_vars sections
3170 specially, because the dynamic loader is 'weird'. */
23209a78
RM		 3171 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3172 && info->shared
3348747a
NS		 3173 && !strcmp (input_section->output_section->name,
3174 ".tls_vars"));
252b5132 3175
eb4ff4d6 3176 elf_i386_set_tls_module_base (info);
9f03412a 3177
25e762b9
RM		 3178 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3179
252b5132
RH		 3180 rel = relocs;
3181 relend = relocs + input_section->reloc_count;
3182 for (; rel < relend; rel++)
3183 {
13ae64f3 3184 unsigned int r_type;
252b5132
RH		 3185 reloc_howto_type *howto;
3186 unsigned long r_symndx;
3187 struct elf_link_hash_entry *h;
3188 Elf_Internal_Sym *sym;
3189 asection *sec;
67a4f2b7 3190 bfd_vma off, offplt;
252b5132 3191 bfd_vma relocation;
b34976b6 3192 bfd_boolean unresolved_reloc;
252b5132 3193 bfd_reloc_status_type r;
1b452ec6 3194 unsigned int indx;
13ae64f3 3195 int tls_type;
1788fc08 3196 bfd_vma st_size;
252b5132
RH		 3197
3198 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 3199 if (r_type == R_386_GNU_VTINHERIT
3200 || r_type == R_386_GNU_VTENTRY)
252b5132 3201 continue;
dc47f327 3202
55fd94b0 3203 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 3204 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3205 >= R_386_ext - R_386_standard)
3206 && ((indx = r_type - R_386_tls_offset) - R_386_ext
cbe950e9 3207 >= R_386_irelative - R_386_ext))
252b5132 3208 {
6ba842b6 3209 (*_bfd_error_handler)
d003868e
AM		 3210 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3211 input_bfd, input_section, r_type);
252b5132 3212 bfd_set_error (bfd_error_bad_value);
b34976b6 3213 return FALSE;
252b5132 3214 }
1b452ec6 3215 howto = elf_howto_table + indx;
252b5132
RH		 3216
3217 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 3218 h = NULL;
3219 sym = NULL;
3220 sec = NULL;
b34976b6 3221 unresolved_reloc = FALSE;
252b5132
RH		 3222 if (r_symndx < symtab_hdr->sh_info)
3223 {
3224 sym = local_syms + r_symndx;
3225 sec = local_sections[r_symndx];
3226 relocation = (sec->output_section->vma
3227 + sec->output_offset
3228 + sym->st_value);
1788fc08 3229 st_size = sym->st_size;
ab96bf03
AM		 3230
3231 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3232 && ((sec->flags & SEC_MERGE) != 0
3233 || (info->relocatable
3234 && sec->output_offset != 0)))
f8df10f4 3235 {
f8df10f4 3236 bfd_vma addend;
4a335f3d 3237 bfd_byte *where = contents + rel->r_offset;
f8df10f4 3238
4a335f3d 3239 switch (howto->size)
f8df10f4 3240 {
4a335f3d
AM		 3241 case 0:
3242 addend = bfd_get_8 (input_bfd, where);
3243 if (howto->pc_relative)
3244 {
3245 addend = (addend ^ 0x80) - 0x80;
3246 addend += 1;
3247 }
3248 break;
3249 case 1:
3250 addend = bfd_get_16 (input_bfd, where);
3251 if (howto->pc_relative)
3252 {
3253 addend = (addend ^ 0x8000) - 0x8000;
3254 addend += 2;
3255 }
3256 break;
3257 case 2:
3258 addend = bfd_get_32 (input_bfd, where);
3259 if (howto->pc_relative)
3260 {
3261 addend = (addend ^ 0x80000000) - 0x80000000;
3262 addend += 4;
3263 }
3264 break;
3265 default:
3266 abort ();
f8df10f4
JJ		 3267 }
3268
ab96bf03
AM		 3269 if (info->relocatable)
3270 addend += sec->output_offset;
3271 else
3272 {
3273 asection *msec = sec;
3274 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3275 addend);
3276 addend -= relocation;
3277 addend += msec->output_section->vma + msec->output_offset;
3278 }
4a335f3d
AM		 3279
3280 switch (howto->size)
3281 {
3282 case 0:
16a10388 3283 /* FIXME: overflow checks. */
4a335f3d
AM		 3284 if (howto->pc_relative)
3285 addend -= 1;
3286 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 3287 break;
3288 case 1:
3289 if (howto->pc_relative)
3290 addend -= 2;
3291 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 3292 break;
3293 case 2:
3294 if (howto->pc_relative)
3295 addend -= 4;
3296 bfd_put_32 (input_bfd, addend, where);
3297 break;
3298 }
f8df10f4 3299 }
1f85278f
L		 3300 else if (!info->relocatable
3301 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc
L		 3302 {
3303 /* Relocate against local STT_GNU_IFUNC symbol. */
9fff0c39
L		 3304 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3305 FALSE);
c25bc9fc
L		 3306 if (h == NULL)
3307 abort ();
3308
23209a78 3309 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3310 h->root.u.def.value = sym->st_value;
3311 h->root.u.def.section = sec;
3312 }
252b5132
RH		 3313 }
3314 else
3315 {
3d540e93 3316 bfd_boolean warned ATTRIBUTE_UNUSED;
ffb2e45b 3317
b2a8e766
AM		 3318 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3319 r_symndx, symtab_hdr, sym_hashes,
3320 h, sec, relocation,
3321 unresolved_reloc, warned);
1788fc08 3322 st_size = h->size;
252b5132
RH		 3323 }
3324
dbaa2011 3325 if (sec != NULL && discarded_section (sec))
0672748a 3326 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 3327 rel, 1, relend, howto, 0, contents);
9635fe29 3328
ab96bf03
AM		 3329 if (info->relocatable)
3330 continue;
3331
cbe950e9
L		 3332 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3333 it here if it is defined in a non-shared object. */
3334 if (h != NULL
3335 && h->type == STT_GNU_IFUNC
3336 && h->def_regular)
3337 {
3338 asection *plt, *gotplt, *base_got;
3339 bfd_vma plt_index;
4c544807 3340 const char *name;
cbe950e9
L		 3341
3342 if ((input_section->flags & SEC_ALLOC) == 0
3343 || h->plt.offset == (bfd_vma) -1)
3344 abort ();
3345
3346 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3347 if (htab->elf.splt != NULL)
cbe950e9 3348 {
6de2ae4a
L		 3349 plt = htab->elf.splt;
3350 gotplt = htab->elf.sgotplt;
cbe950e9
L		 3351 }
3352 else
3353 {
6de2ae4a
L		 3354 plt = htab->elf.iplt;
3355 gotplt = htab->elf.igotplt;
cbe950e9
L		 3356 }
3357
3358 relocation = (plt->output_section->vma
3359 + plt->output_offset + h->plt.offset);
3360
3361 switch (r_type)
3362 {
3363 default:
4c544807
L		 3364 if (h->root.root.string)
3365 name = h->root.root.string;
3366 else
3367 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3368 NULL);
cbe950e9
L		 3369 (*_bfd_error_handler)
3370 (_("%B: relocation %s against STT_GNU_IFUNC "
3371 "symbol `%s' isn't handled by %s"), input_bfd,
3372 elf_howto_table[r_type].name,
4c544807 3373 name, __FUNCTION__);
cbe950e9
L		 3374 bfd_set_error (bfd_error_bad_value);
3375 return FALSE;
3376
3377 case R_386_32:
710ab287 3378 /* Generate dynamic relcoation only when there is a
c293fa49 3379 non-GOT reference in a shared object. */
710ab287
L		 3380 if (info->shared && h->non_got_ref)
3381 {
3382 Elf_Internal_Rela outrel;
710ab287
L		 3383 asection *sreloc;
3384 bfd_vma offset;
3385
c25bc9fc
L		 3386 /* Need a dynamic relocation to get the real function
3387 adddress. */
710ab287
L		 3388 offset = _bfd_elf_section_offset (output_bfd,
3389 info,
3390 input_section,
3391 rel->r_offset);
3392 if (offset == (bfd_vma) -1
3393 || offset == (bfd_vma) -2)
3394 abort ();
3395
3396 outrel.r_offset = (input_section->output_section->vma
3397 + input_section->output_offset
3398 + offset);
3399
3400 if (h->dynindx == -1
44c4ea11
L		 3401 || h->forced_local
3402 || info->executable)
710ab287
L		 3403 {
3404 /* This symbol is resolved locally. */
56b8aada
L		 3405 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3406 bfd_put_32 (output_bfd,
3407 (h->root.u.def.value
3408 + h->root.u.def.section->output_section->vma
3409 + h->root.u.def.section->output_offset),
3410 contents + offset);
710ab287
L		 3411 }
3412 else
56b8aada 3413 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
710ab287 3414
6de2ae4a 3415 sreloc = htab->elf.irelifunc;
59d6ffb2 3416 elf_append_rel (output_bfd, sreloc, &outrel);
710ab287
L		 3417
3418 /* If this reloc is against an external symbol, we
3419 do not want to fiddle with the addend. Otherwise,
3420 we need to include the symbol value so that it
3421 becomes an addend for the dynamic reloc. For an
3422 internal symbol, we have updated addend. */
56b8aada 3423 continue;
710ab287 3424 }
d59a60e9 3425 /* FALLTHROUGH */
cbe950e9
L		 3426 case R_386_PC32:
3427 case R_386_PLT32:
3428 goto do_relocation;
3429
3430 case R_386_GOT32:
6de2ae4a 3431 base_got = htab->elf.sgot;
cbe950e9
L		 3432 off = h->got.offset;
3433
7afd84dc 3434 if (base_got == NULL)
cbe950e9
L		 3435 abort ();
3436
7afd84dc 3437 if (off == (bfd_vma) -1)
cbe950e9 3438 {
7afd84dc
L		 3439 /* We can't use h->got.offset here to save state, or
3440 even just remember the offset, as finish_dynamic_symbol
3441 would use that as offset into .got. */
6bbec505 3442
6de2ae4a 3443 if (htab->elf.splt != NULL)
7afd84dc 3444 {
25e762b9 3445 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 3446 off = (plt_index + 3) * 4;
6de2ae4a 3447 base_got = htab->elf.sgotplt;
7afd84dc 3448 }
cbe950e9
L		 3449 else
3450 {
25e762b9 3451 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3452 off = plt_index * 4;
6de2ae4a 3453 base_got = htab->elf.igotplt;
7afd84dc
L		 3454 }
3455
3456 if (h->dynindx == -1
3457 || h->forced_local
3458 || info->symbolic)
3459 {
3460 /* This references the local defitionion. We must
3461 initialize this entry in the global offset table.
3462 Since the offset must always be a multiple of 8,
3463 we use the least significant bit to record
3464 whether we have initialized it already.
3465
3466 When doing a dynamic link, we create a .rela.got
3467 relocation entry to initialize the value. This
3468 is done in the finish_dynamic_symbol routine. */
3469 if ((off & 1) != 0)
3470 off &= ~1;
3471 else
3472 {
3473 bfd_put_32 (output_bfd, relocation,
3474 base_got->contents + off);
3475 h->got.offset |= 1;
3476 }
cbe950e9 3477 }
cbe950e9 3478
7afd84dc 3479 relocation = off;
cbe950e9 3480
7afd84dc 3481 /* Adjust for static executables. */
6de2ae4a 3482 if (htab->elf.splt == NULL)
7afd84dc
L		 3483 relocation += gotplt->output_offset;
3484 }
3485 else
0018b0a3
L		 3486 {
3487 relocation = (base_got->output_section->vma
3488 + base_got->output_offset + off
3489 - gotplt->output_section->vma
3490 - gotplt->output_offset);
3491 /* Adjust for static executables. */
6de2ae4a 3492 if (htab->elf.splt == NULL)
0018b0a3
L		 3493 relocation += gotplt->output_offset;
3494 }
3495
cbe950e9
L		 3496 goto do_relocation;
3497
3498 case R_386_GOTOFF:
3499 relocation -= (gotplt->output_section->vma
3500 + gotplt->output_offset);
3501 goto do_relocation;
3502 }
3503 }
3504
252b5132
RH		 3505 switch (r_type)
3506 {
3507 case R_386_GOT32:
3508 /* Relocation is to the entry for this symbol in the global
3509 offset table. */
6de2ae4a 3510 if (htab->elf.sgot == NULL)
ffb2e45b 3511 abort ();
252b5132
RH		 3512
3513 if (h != NULL)
3514 {
b34976b6 3515 bfd_boolean dyn;
252b5132
RH		 3516
3517 off = h->got.offset;
ebe50bae 3518 dyn = htab->elf.dynamic_sections_created;
26e41594 3519 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
252b5132 3520 || (info->shared
586119b3 3521 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 3522 || (ELF_ST_VISIBILITY (h->other)
3523 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 3524 {
3525 /* This is actually a static link, or it is a
3526 -Bsymbolic link and the symbol is defined
3527 locally, or the symbol was forced to be local
3528 because of a version file. We must initialize
3529 this entry in the global offset table. Since the
3530 offset must always be a multiple of 4, we use the
3531 least significant bit to record whether we have
3532 initialized it already.
3533
3534 When doing a dynamic link, we create a .rel.got
3535 relocation entry to initialize the value. This
3536 is done in the finish_dynamic_symbol routine. */
3537 if ((off & 1) != 0)
3538 off &= ~1;
3539 else
3540 {
3541 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3542 htab->elf.sgot->contents + off);
252b5132
RH		 3543 h->got.offset |= 1;
3544 }
3545 }
8c694914 3546 else
b34976b6 3547 unresolved_reloc = FALSE;
252b5132
RH		 3548 }
3549 else
3550 {
ffb2e45b
AM		 3551 if (local_got_offsets == NULL)
3552 abort ();
252b5132
RH		 3553
3554 off = local_got_offsets[r_symndx];
3555
3556 /* The offset must always be a multiple of 4. We use
83be169b
AM		 3557 the least significant bit to record whether we have
3558 already generated the necessary reloc. */
252b5132
RH		 3559 if ((off & 1) != 0)
3560 off &= ~1;
3561 else
3562 {
6725bdbf 3563 bfd_put_32 (output_bfd, relocation,
6de2ae4a 3564 htab->elf.sgot->contents + off);
252b5132
RH		 3565
3566 if (info->shared)
3567 {
947216bf
AM		 3568 asection *s;
3569 Elf_Internal_Rela outrel;
252b5132 3570
6de2ae4a 3571 s = htab->elf.srelgot;
947216bf 3572 if (s == NULL)
ffb2e45b 3573 abort ();
252b5132 3574
6de2ae4a
L		 3575 outrel.r_offset = (htab->elf.sgot->output_section->vma
3576 + htab->elf.sgot->output_offset
252b5132
RH		 3577 + off);
3578 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
59d6ffb2 3579 elf_append_rel (output_bfd, s, &outrel);
252b5132
RH		 3580 }
3581
3582 local_got_offsets[r_symndx] |= 1;
3583 }
252b5132
RH		 3584 }
3585
ffb2e45b
AM		 3586 if (off >= (bfd_vma) -2)
3587 abort ();
3588
6de2ae4a
L		 3589 relocation = htab->elf.sgot->output_section->vma
3590 + htab->elf.sgot->output_offset + off
3591 - htab->elf.sgotplt->output_section->vma
3592 - htab->elf.sgotplt->output_offset;
252b5132
RH		 3593 break;
3594
3595 case R_386_GOTOFF:
3596 /* Relocation is relative to the start of the global offset
3597 table. */
3598
90f487df
L		 3599 /* Check to make sure it isn't a protected function symbol
3600 for shared library since it may not be local when used
41bed6dd
L		 3601 as function address. We also need to make sure that a
3602 symbol is defined locally. */
3603 if (info->shared && h)
90f487df 3604 {
41bed6dd
L		 3605 if (!h->def_regular)
3606 {
3607 const char *v;
3608
3609 switch (ELF_ST_VISIBILITY (h->other))
3610 {
3611 case STV_HIDDEN:
3612 v = _("hidden symbol");
3613 break;
3614 case STV_INTERNAL:
3615 v = _("internal symbol");
3616 break;
3617 case STV_PROTECTED:
3618 v = _("protected symbol");
3619 break;
3620 default:
3621 v = _("symbol");
3622 break;
3623 }
3624
3625 (*_bfd_error_handler)
3626 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3627 input_bfd, v, h->root.root.string);
3628 bfd_set_error (bfd_error_bad_value);
3629 return FALSE;
3630 }
3631 else if (!info->executable
bdb892b9 3632 && !SYMBOLIC_BIND (info, h)
41bed6dd
L		 3633 && h->type == STT_FUNC
3634 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3635 {
3636 (*_bfd_error_handler)
3637 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3638 input_bfd, h->root.root.string);
3639 bfd_set_error (bfd_error_bad_value);
3640 return FALSE;
3641 }
90f487df
L		 3642 }
3643
8c37241b
JJ		 3644 /* Note that sgot is not involved in this
3645 calculation. We always want the start of .got.plt. If we
3646 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 3647 permitted by the ABI, we might have to change this
3648 calculation. */
6de2ae4a
L		 3649 relocation -= htab->elf.sgotplt->output_section->vma
3650 + htab->elf.sgotplt->output_offset;
252b5132
RH		 3651 break;
3652
3653 case R_386_GOTPC:
3654 /* Use global offset table as symbol value. */
6de2ae4a
L		 3655 relocation = htab->elf.sgotplt->output_section->vma
3656 + htab->elf.sgotplt->output_offset;
b34976b6 3657 unresolved_reloc = FALSE;
252b5132
RH		 3658 break;
3659
3660 case R_386_PLT32:
3661 /* Relocation is to the entry for this symbol in the
3662 procedure linkage table. */
3663
dd5724d5 3664 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 3665 without using the procedure linkage table. */
252b5132
RH		 3666 if (h == NULL)
3667 break;
3668
dd5724d5 3669 if (h->plt.offset == (bfd_vma) -1
6de2ae4a 3670 || htab->elf.splt == NULL)
252b5132
RH		 3671 {
3672 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 3673 happens when statically linking PIC code, or when
3674 using -Bsymbolic. */
252b5132
RH		 3675 break;
3676 }
3677
6de2ae4a
L		 3678 relocation = (htab->elf.splt->output_section->vma
3679 + htab->elf.splt->output_offset
252b5132 3680 + h->plt.offset);
b34976b6 3681 unresolved_reloc = FALSE;
252b5132
RH		 3682 break;
3683
1788fc08
L		 3684 case R_386_SIZE32:
3685 if (h
3686 && h->type == STT_TLS
3687 && (h->root.type == bfd_link_hash_defined
3688 || h->root.type == bfd_link_hash_defweak)
3689 && h->root.u.def.section->output_section != NULL
3690 && htab->elf.tls_sec == NULL)
3691 {
3692 (*_bfd_error_handler)
3693 (_("%B: `%s' accessed both as normal and thread local symbol"),
3694 input_bfd, h->root.root.string);
3695 bfd_set_error (bfd_error_bad_value);
3696 return FALSE;
3697 }
3698
3699 /* Set to symbol size. */
3700 relocation = st_size;
3701 /* Fall through. */
3702
252b5132
RH		 3703 case R_386_32:
3704 case R_386_PC32:
3348747a
NS		 3705 if ((input_section->flags & SEC_ALLOC) == 0
3706 || is_vxworks_tls)
ec338859
AM		 3707 break;
3708
12d0ee4a 3709 if ((info->shared
ef5aade5
L		 3710 && (h == NULL
3711 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3712 || h->root.type != bfd_link_hash_undefweak)
1788fc08 3713 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
f6c52c13 3714 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845
AM		 3715 || (ELIMINATE_COPY_RELOCS
3716 && !info->shared
12d0ee4a
AM		 3717 && h != NULL
3718 && h->dynindx != -1
f5385ebf
AM		 3719 && !h->non_got_ref
3720 && ((h->def_dynamic
3721 && !h->def_regular)
28d0b90e 3722 || h->root.type == bfd_link_hash_undefweak
0f88be7a 3723 || h->root.type == bfd_link_hash_undefined)))
252b5132 3724 {
947216bf 3725 Elf_Internal_Rela outrel;
b34976b6 3726 bfd_boolean skip, relocate;
0c715baa 3727 asection *sreloc;
252b5132
RH		 3728
3729 /* When generating a shared object, these relocations
3730 are copied into the output file to be resolved at run
3731 time. */
3732
b34976b6
AM		 3733 skip = FALSE;
3734 relocate = FALSE;
252b5132 3735
c629eae0
JJ		 3736 outrel.r_offset =
3737 _bfd_elf_section_offset (output_bfd, info, input_section,
3738 rel->r_offset);
3739 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 3740 skip = TRUE;
0bb2d96a 3741 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 3742 skip = TRUE, relocate = TRUE;
252b5132
RH		 3743 outrel.r_offset += (input_section->output_section->vma
3744 + input_section->output_offset);
3745
3746 if (skip)
0bb2d96a 3747 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 3748 else if (h != NULL
3749 && h->dynindx != -1
3750 && (r_type == R_386_PC32
3751 || !info->shared
55255dae 3752 || !SYMBOLIC_BIND (info, h)
f5385ebf 3753 || !h->def_regular))
0bb2d96a 3754 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 3755 else
3756 {
5a15f56f 3757 /* This symbol is local, or marked to become local. */
b34976b6 3758 relocate = TRUE;
5a15f56f 3759 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 3760 }
3761
cbe950e9 3762 sreloc = elf_section_data (input_section)->sreloc;
e7c33416 3763
62d78908
L		 3764 if (sreloc == NULL || sreloc->contents == NULL)
3765 {
3766 r = bfd_reloc_notsupported;
3767 goto check_relocation_error;
3768 }
0c715baa 3769
59d6ffb2 3770 elf_append_rel (output_bfd, sreloc, &outrel);
252b5132
RH		 3771
3772 /* If this reloc is against an external symbol, we do
3773 not want to fiddle with the addend. Otherwise, we
3774 need to include the symbol value so that it becomes
3775 an addend for the dynamic reloc. */
0f88be7a 3776 if (! relocate)
252b5132
RH		 3777 continue;
3778 }
252b5132
RH		 3779 break;
3780
37e55690 3781 case R_386_TLS_IE:
1d85728f 3782 if (!info->executable)
37e55690 3783 {
947216bf 3784 Elf_Internal_Rela outrel;
37e55690 3785 asection *sreloc;
37e55690
JJ		 3786
3787 outrel.r_offset = rel->r_offset
3788 + input_section->output_section->vma
3789 + input_section->output_offset;
3790 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3791 sreloc = elf_section_data (input_section)->sreloc;
3792 if (sreloc == NULL)
3793 abort ();
59d6ffb2 3794 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 3795 }
3796 /* Fall through */
3797
13ae64f3 3798 case R_386_TLS_GD:
67a4f2b7
AO		 3799 case R_386_TLS_GOTDESC:
3800 case R_386_TLS_DESC_CALL:
13ae64f3 3801 case R_386_TLS_IE_32:
37e55690 3802 case R_386_TLS_GOTIE:
13ae64f3
JJ		 3803 tls_type = GOT_UNKNOWN;
3804 if (h == NULL && local_got_offsets)
3805 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3806 else if (h != NULL)
142411ca 3807 tls_type = elf_i386_hash_entry(h)->tls_type;
37e55690
JJ		 3808 if (tls_type == GOT_TLS_IE)
3809 tls_type = GOT_TLS_IE_NEG;
142411ca
L		 3810
3811 if (! elf_i386_tls_transition (info, input_bfd,
3812 input_section, contents,
3813 symtab_hdr, sym_hashes,
3814 &r_type, tls_type, rel,
4c544807 3815 relend, h, r_symndx))
142411ca 3816 return FALSE;
13ae64f3
JJ		 3817
3818 if (r_type == R_386_TLS_LE_32)
3819 {
82e51918 3820 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 3821 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3822 {
142411ca 3823 unsigned int type;
13ae64f3
JJ		 3824 bfd_vma roff;
3825
3826 /* GD->LE transition. */
13ae64f3 3827 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ		 3828 if (type == 0x04)
3829 {
3830 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3831 Change it into:
3832 movl %gs:0, %eax; subl $foo@tpoff, %eax
3833 (6 byte form of subl). */
13ae64f3
JJ		 3834 memcpy (contents + rel->r_offset - 3,
3835 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
142411ca 3836 roff = rel->r_offset + 5;
13ae64f3
JJ		 3837 }
3838 else
3839 {
142411ca
L		 3840 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3841 Change it into:
3842 movl %gs:0, %eax; subl $foo@tpoff, %eax
3843 (6 byte form of subl). */
3844 memcpy (contents + rel->r_offset - 2,
3845 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3846 roff = rel->r_offset + 6;
13ae64f3 3847 }
eb4ff4d6 3848 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
13ae64f3 3849 contents + roff);
a3fadc9a 3850 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3
JJ		 3851 rel++;
3852 continue;
3853 }
67a4f2b7
AO		 3854 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3855 {
3856 /* GDesc -> LE transition.
3857 It's originally something like:
3858 leal x@tlsdesc(%ebx), %eax
3859
3860 leal x@ntpoff, %eax
3861
3862 Registers other than %eax may be set up here. */
3863
142411ca 3864 unsigned int val;
67a4f2b7
AO		 3865 bfd_vma roff;
3866
67a4f2b7 3867 roff = rel->r_offset;
67a4f2b7 3868 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 3869
3870 /* Now modify the instruction as appropriate. */
3871 /* aoliva FIXME: remove the above and xor the byte
3872 below with 0x86. */
3873 bfd_put_8 (output_bfd, val ^ 0x86,
3874 contents + roff - 1);
eb4ff4d6 3875 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
67a4f2b7
AO		 3876 contents + roff);
3877 continue;
3878 }
3879 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3880 {
3881 /* GDesc -> LE transition.
3882 It's originally:
3883 call *(%eax)
3884 Turn it into:
142411ca 3885 xchg %ax,%ax */
67a4f2b7 3886
67a4f2b7 3887 bfd_vma roff;
6bbec505 3888
67a4f2b7 3889 roff = rel->r_offset;
10efb593 3890 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3891 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3892 continue;
3893 }
37e55690 3894 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3 3895 {
142411ca 3896 unsigned int val;
13ae64f3
JJ		 3897
3898 /* IE->LE transition:
37e55690
JJ		 3899 Originally it can be one of:
3900 movl foo, %eax
3901 movl foo, %reg
3902 addl foo, %reg
3903 We change it into:
3904 movl $foo, %eax
3905 movl $foo, %reg
3906 addl $foo, %reg. */
37e55690 3907 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 3908 if (val == 0xa1)
3909 {
3910 /* movl foo, %eax. */
55fd94b0
AM		 3911 bfd_put_8 (output_bfd, 0xb8,
3912 contents + rel->r_offset - 1);
37e55690 3913 }
299bf759 3914 else
37e55690 3915 {
142411ca
L		 3916 unsigned int type;
3917
55fd94b0
AM		 3918 type = bfd_get_8 (input_bfd,
3919 contents + rel->r_offset - 2);
299bf759 3920 switch (type)
26e41594 3921 {
299bf759
L		 3922 case 0x8b:
3923 /* movl */
299bf759
L		 3924 bfd_put_8 (output_bfd, 0xc7,
3925 contents + rel->r_offset - 2);
3926 bfd_put_8 (output_bfd,
3927 0xc0 | ((val >> 3) & 7),
3928 contents + rel->r_offset - 1);
3929 break;
3930 case 0x03:
3931 /* addl */
299bf759
L		 3932 bfd_put_8 (output_bfd, 0x81,
3933 contents + rel->r_offset - 2);
3934 bfd_put_8 (output_bfd,
3935 0xc0 | ((val >> 3) & 7),
3936 contents + rel->r_offset - 1);
3937 break;
3938 default:
3939 BFD_FAIL ();
3940 break;
26e41594 3941 }
37e55690 3942 }
eb4ff4d6 3943 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 3944 contents + rel->r_offset);
3945 continue;
3946 }
3947 else
3948 {
3949 unsigned int val, type;
3950
3951 /* {IE_32,GOTIE}->LE transition:
3952 Originally it can be one of:
13ae64f3 3953 subl foo(%reg1), %reg2
13ae64f3 3954 movl foo(%reg1), %reg2
37e55690 3955 addl foo(%reg1), %reg2
13ae64f3
JJ		 3956 We change it into:
3957 subl $foo, %reg2
37e55690
JJ		 3958 movl $foo, %reg2 (6 byte form)
3959 addl $foo, %reg2. */
13ae64f3
JJ		 3960 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3961 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 3962 if (type == 0x8b)
3963 {
3964 /* movl */
13ae64f3
JJ		 3965 bfd_put_8 (output_bfd, 0xc7,
3966 contents + rel->r_offset - 2);
3967 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3968 contents + rel->r_offset - 1);
3969 }
3970 else if (type == 0x2b)
3971 {
3972 /* subl */
13ae64f3
JJ		 3973 bfd_put_8 (output_bfd, 0x81,
3974 contents + rel->r_offset - 2);
3975 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3976 contents + rel->r_offset - 1);
3977 }
37e55690
JJ		 3978 else if (type == 0x03)
3979 {
3980 /* addl */
3981 bfd_put_8 (output_bfd, 0x81,
3982 contents + rel->r_offset - 2);
3983 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3984 contents + rel->r_offset - 1);
3985 }
13ae64f3
JJ		 3986 else
3987 BFD_FAIL ();
37e55690 3988 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
eb4ff4d6 3989 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
37e55690
JJ		 3990 contents + rel->r_offset);
3991 else
eb4ff4d6 3992 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
37e55690 3993 contents + rel->r_offset);
13ae64f3
JJ		 3994 continue;
3995 }
3996 }
3997
6de2ae4a 3998 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 3999 abort ();
4000
4001 if (h != NULL)
67a4f2b7
AO		 4002 {
4003 off = h->got.offset;
4004 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4005 }
13ae64f3
JJ		 4006 else
4007 {
4008 if (local_got_offsets == NULL)
4009 abort ();
4010
4011 off = local_got_offsets[r_symndx];
67a4f2b7 4012 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 4013 }
4014
4015 if ((off & 1) != 0)
4016 off &= ~1;
26e41594 4017 else
13ae64f3 4018 {
947216bf 4019 Elf_Internal_Rela outrel;
91d6fa6a 4020 int dr_type;
67a4f2b7 4021 asection *sreloc;
13ae64f3 4022
6de2ae4a 4023 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4024 abort ();
4025
67a4f2b7
AO		 4026 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4027
4028 if (GOT_TLS_GDESC_P (tls_type))
4029 {
59d6ffb2 4030 bfd_byte *loc;
67a4f2b7
AO		 4031 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4032 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
6de2ae4a
L		 4033 <= htab->elf.sgotplt->size);
4034 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4035 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4036 + offplt
4037 + htab->sgotplt_jump_table_size);
6de2ae4a 4038 sreloc = htab->elf.srelplt;
67a4f2b7 4039 loc = sreloc->contents;
5ae0bfb6
RS		 4040 loc += (htab->next_tls_desc_index++
4041 * sizeof (Elf32_External_Rel));
67a4f2b7 4042 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
c3b02097 4043 <= sreloc->contents + sreloc->size);
67a4f2b7
AO		 4044 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4045 if (indx == 0)
4046 {
4047 BFD_ASSERT (! unresolved_reloc);
4048 bfd_put_32 (output_bfd,
eb4ff4d6 4049 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4050 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4051 + htab->sgotplt_jump_table_size + 4);
4052 }
4053 else
4054 {
4055 bfd_put_32 (output_bfd, 0,
6de2ae4a 4056 htab->elf.sgotplt->contents + offplt
67a4f2b7
AO		 4057 + htab->sgotplt_jump_table_size + 4);
4058 }
4059 }
4060
6de2ae4a 4061 sreloc = htab->elf.srelgot;
67a4f2b7 4062
6de2ae4a
L		 4063 outrel.r_offset = (htab->elf.sgot->output_section->vma
4064 + htab->elf.sgot->output_offset + off);
13ae64f3 4065
67a4f2b7 4066 if (GOT_TLS_GD_P (tls_type))
13ae64f3 4067 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 4068 else if (GOT_TLS_GDESC_P (tls_type))
4069 goto dr_done;
37e55690
JJ		 4070 else if (tls_type == GOT_TLS_IE_POS)
4071 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 4072 else
4073 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 4074
37e55690 4075 if (dr_type == R_386_TLS_TPOFF && indx == 0)
eb4ff4d6
L		 4076 bfd_put_32 (output_bfd,
4077 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4078 htab->elf.sgot->contents + off);
37e55690 4079 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
23209a78 4080 bfd_put_32 (output_bfd,
eb4ff4d6 4081 elf_i386_dtpoff_base (info) - relocation,
6de2ae4a 4082 htab->elf.sgot->contents + off);
67a4f2b7 4083 else if (dr_type != R_386_TLS_DESC)
c366c25e 4084 bfd_put_32 (output_bfd, 0,
6de2ae4a 4085 htab->elf.sgot->contents + off);
13ae64f3 4086 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7 4087
59d6ffb2 4088 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3 4089
67a4f2b7 4090 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 4091 {
4092 if (indx == 0)
4093 {
82e51918 4094 BFD_ASSERT (! unresolved_reloc);
13ae64f3 4095 bfd_put_32 (output_bfd,
eb4ff4d6 4096 relocation - elf_i386_dtpoff_base (info),
6de2ae4a 4097 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4098 }
4099 else
4100 {
4101 bfd_put_32 (output_bfd, 0,
6de2ae4a 4102 htab->elf.sgot->contents + off + 4);
13ae64f3
JJ		 4103 outrel.r_info = ELF32_R_INFO (indx,
4104 R_386_TLS_DTPOFF32);
4105 outrel.r_offset += 4;
59d6ffb2 4106 elf_append_rel (output_bfd, sreloc, &outrel);
13ae64f3
JJ		 4107 }
4108 }
37e55690
JJ		 4109 else if (tls_type == GOT_TLS_IE_BOTH)
4110 {
4111 bfd_put_32 (output_bfd,
eb4ff4d6
L		 4112 (indx == 0
4113 ? relocation - elf_i386_dtpoff_base (info)
4114 : 0),
6de2ae4a 4115 htab->elf.sgot->contents + off + 4);
37e55690
JJ		 4116 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4117 outrel.r_offset += 4;
59d6ffb2 4118 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690 4119 }
13ae64f3 4120
67a4f2b7 4121 dr_done:
13ae64f3
JJ		 4122 if (h != NULL)
4123 h->got.offset |= 1;
4124 else
4125 local_got_offsets[r_symndx] |= 1;
4126 }
4127
67a4f2b7
AO		 4128 if (off >= (bfd_vma) -2
4129 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 4130 abort ();
67a4f2b7
AO		 4131 if (r_type == R_386_TLS_GOTDESC
4132 || r_type == R_386_TLS_DESC_CALL)
4133 {
4134 relocation = htab->sgotplt_jump_table_size + offplt;
4135 unresolved_reloc = FALSE;
4136 }
4137 else if (r_type == ELF32_R_TYPE (rel->r_info))
13ae64f3 4138 {
6de2ae4a
L		 4139 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4140 + htab->elf.sgotplt->output_offset;
4141 relocation = htab->elf.sgot->output_section->vma
4142 + htab->elf.sgot->output_offset + off - g_o_t;
37e55690
JJ		 4143 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4144 && tls_type == GOT_TLS_IE_BOTH)
4145 relocation += 4;
4146 if (r_type == R_386_TLS_IE)
8c37241b 4147 relocation += g_o_t;
b34976b6 4148 unresolved_reloc = FALSE;
13ae64f3 4149 }
67a4f2b7 4150 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
13ae64f3
JJ		 4151 {
4152 unsigned int val, type;
4153 bfd_vma roff;
4154
4155 /* GD->IE transition. */
13ae64f3 4156 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ		 4157 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4158 if (type == 0x04)
4159 {
4160 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4161 Change it into:
4162 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3 4163 val >>= 3;
142411ca 4164 roff = rel->r_offset - 3;
13ae64f3
JJ		 4165 }
4166 else
4167 {
4168 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4169 Change it into:
4170 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 4171 roff = rel->r_offset - 2;
4172 }
4173 memcpy (contents + roff,
4174 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4175 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 4176 /* If foo is used only with foo@gotntpoff(%reg) and
4177 foo@indntpoff, but not with foo@gottpoff(%reg), change
4178 subl $foo@gottpoff(%reg), %eax
4179 into:
4180 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 4181 if (tls_type == GOT_TLS_IE_POS)
4182 contents[roff + 6] = 0x03;
8c37241b 4183 bfd_put_32 (output_bfd,
6de2ae4a
L		 4184 htab->elf.sgot->output_section->vma
4185 + htab->elf.sgot->output_offset + off
4186 - htab->elf.sgotplt->output_section->vma
4187 - htab->elf.sgotplt->output_offset,
13ae64f3
JJ		 4188 contents + roff + 8);
4189 /* Skip R_386_PLT32. */
4190 rel++;
4191 continue;
4192 }
67a4f2b7
AO		 4193 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4194 {
4195 /* GDesc -> IE transition.
4196 It's originally something like:
4197 leal x@tlsdesc(%ebx), %eax
4198
4199 Change it to:
142411ca 4200 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 4201 or:
4202 movl x@gottpoff(%ebx), %eax # before negl %eax
4203
4204 Registers other than %eax may be set up here. */
4205
67a4f2b7
AO		 4206 bfd_vma roff;
4207
4208 /* First, make sure it's a leal adding ebx to a 32-bit
4209 offset into any register, although it's probably
4210 almost always going to be eax. */
4211 roff = rel->r_offset;
67a4f2b7
AO		 4212
4213 /* Now modify the instruction as appropriate. */
4214 /* To turn a leal into a movl in the form we use it, it
4215 suffices to change the first byte from 0x8d to 0x8b.
4216 aoliva FIXME: should we decide to keep the leal, all
4217 we have to do is remove the statement below, and
4218 adjust the relaxation of R_386_TLS_DESC_CALL. */
4219 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4220
4221 if (tls_type == GOT_TLS_IE_BOTH)
4222 off += 4;
4223
4224 bfd_put_32 (output_bfd,
6de2ae4a
L		 4225 htab->elf.sgot->output_section->vma
4226 + htab->elf.sgot->output_offset + off
4227 - htab->elf.sgotplt->output_section->vma
4228 - htab->elf.sgotplt->output_offset,
67a4f2b7
AO		 4229 contents + roff);
4230 continue;
4231 }
4232 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4233 {
4234 /* GDesc -> IE transition.
4235 It's originally:
4236 call *(%eax)
4237
4238 Change it to:
142411ca 4239 xchg %ax,%ax
67a4f2b7
AO		 4240 or
4241 negl %eax
4242 depending on how we transformed the TLS_GOTDESC above.
4243 */
4244
67a4f2b7
AO		 4245 bfd_vma roff;
4246
67a4f2b7 4247 roff = rel->r_offset;
67a4f2b7
AO		 4248
4249 /* Now modify the instruction as appropriate. */
4250 if (tls_type != GOT_TLS_IE_NEG)
4251 {
10efb593
L		 4252 /* xchg %ax,%ax */
4253 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4254 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4255 }
4256 else
4257 {
4258 /* negl %eax */
4259 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4260 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4261 }
4262
4263 continue;
4264 }
4265 else
4266 BFD_ASSERT (FALSE);
13ae64f3
JJ		 4267 break;
4268
4269 case R_386_TLS_LDM:
142411ca
L		 4270 if (! elf_i386_tls_transition (info, input_bfd,
4271 input_section, contents,
4272 symtab_hdr, sym_hashes,
4273 &r_type, GOT_UNKNOWN, rel,
4c544807 4274 relend, h, r_symndx))
142411ca 4275 return FALSE;
13ae64f3 4276
142411ca
L		 4277 if (r_type != R_386_TLS_LDM)
4278 {
13ae64f3 4279 /* LD->LE transition:
13ae64f3
JJ		 4280 leal foo(%reg), %eax; call ___tls_get_addr.
4281 We change it into:
4282 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
142411ca 4283 BFD_ASSERT (r_type == R_386_TLS_LE_32);
13ae64f3
JJ		 4284 memcpy (contents + rel->r_offset - 2,
4285 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 4286 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3
JJ		 4287 rel++;
4288 continue;
4289 }
4290
6de2ae4a 4291 if (htab->elf.sgot == NULL)
13ae64f3
JJ		 4292 abort ();
4293
4294 off = htab->tls_ldm_got.offset;
4295 if (off & 1)
4296 off &= ~1;
4297 else
4298 {
947216bf 4299 Elf_Internal_Rela outrel;
13ae64f3 4300
6de2ae4a 4301 if (htab->elf.srelgot == NULL)
13ae64f3
JJ		 4302 abort ();
4303
6de2ae4a
L		 4304 outrel.r_offset = (htab->elf.sgot->output_section->vma
4305 + htab->elf.sgot->output_offset + off);
13ae64f3
JJ		 4306
4307 bfd_put_32 (output_bfd, 0,
6de2ae4a 4308 htab->elf.sgot->contents + off);
13ae64f3 4309 bfd_put_32 (output_bfd, 0,
6de2ae4a 4310 htab->elf.sgot->contents + off + 4);
13ae64f3 4311 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
59d6ffb2 4312 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
13ae64f3
JJ		 4313 htab->tls_ldm_got.offset |= 1;
4314 }
6de2ae4a
L		 4315 relocation = htab->elf.sgot->output_section->vma
4316 + htab->elf.sgot->output_offset + off
4317 - htab->elf.sgotplt->output_section->vma
4318 - htab->elf.sgotplt->output_offset;
b34976b6 4319 unresolved_reloc = FALSE;
13ae64f3
JJ		 4320 break;
4321
4322 case R_386_TLS_LDO_32:
959b0961 4323 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
eb4ff4d6 4324 relocation -= elf_i386_dtpoff_base (info);
13ae64f3
JJ		 4325 else
4326 /* When converting LDO to LE, we must negate. */
eb4ff4d6 4327 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4328 break;
4329
4330 case R_386_TLS_LE_32:
13ae64f3 4331 case R_386_TLS_LE:
1d85728f 4332 if (!info->executable)
37e55690 4333 {
947216bf 4334 Elf_Internal_Rela outrel;
37e55690 4335 asection *sreloc;
37e55690
JJ		 4336
4337 outrel.r_offset = rel->r_offset
4338 + input_section->output_section->vma
4339 + input_section->output_offset;
4340 if (h != NULL && h->dynindx != -1)
4341 indx = h->dynindx;
4342 else
4343 indx = 0;
4344 if (r_type == R_386_TLS_LE_32)
4345 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4346 else
4347 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4348 sreloc = elf_section_data (input_section)->sreloc;
4349 if (sreloc == NULL)
4350 abort ();
59d6ffb2 4351 elf_append_rel (output_bfd, sreloc, &outrel);
37e55690
JJ		 4352 if (indx)
4353 continue;
4354 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 4355 relocation = elf_i386_dtpoff_base (info) - relocation;
37e55690 4356 else
eb4ff4d6 4357 relocation -= elf_i386_dtpoff_base (info);
37e55690
JJ		 4358 }
4359 else if (r_type == R_386_TLS_LE_32)
eb4ff4d6 4360 relocation = elf_i386_tpoff (info, relocation);
37e55690 4361 else
eb4ff4d6 4362 relocation = -elf_i386_tpoff (info, relocation);
13ae64f3
JJ		 4363 break;
4364
252b5132
RH		 4365 default:
4366 break;
4367 }
4368
239e1f3a
AM		 4369 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4370 because such sections are not SEC_ALLOC and thus ld.so will
4371 not process them. */
8c694914 4372 if (unresolved_reloc
239e1f3a 4373 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4374 && h->def_dynamic)
4375 && _bfd_elf_section_offset (output_bfd, info, input_section,
4376 rel->r_offset) != (bfd_vma) -1)
6a30718d
JJ		 4377 {
4378 (*_bfd_error_handler)
843fe662 4379 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 4380 input_bfd,
4381 input_section,
6a30718d 4382 (long) rel->r_offset,
843fe662 4383 howto->name,
6a30718d 4384 h->root.root.string);
b34976b6 4385 return FALSE;
6a30718d 4386 }
83be169b 4387
cbe950e9 4388do_relocation:
252b5132
RH		 4389 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4390 contents, rel->r_offset,
55fd94b0 4391 relocation, 0);
252b5132 4392
62d78908 4393check_relocation_error:
cf5c0c5b 4394 if (r != bfd_reloc_ok)
252b5132 4395 {
cf5c0c5b 4396 const char *name;
ffb2e45b 4397
cf5c0c5b
AM		 4398 if (h != NULL)
4399 name = h->root.root.string;
4400 else
4401 {
4402 name = bfd_elf_string_from_elf_section (input_bfd,
4403 symtab_hdr->sh_link,
4404 sym->st_name);
4405 if (name == NULL)
b34976b6 4406 return FALSE;
cf5c0c5b
AM		 4407 if (*name == '\0')
4408 name = bfd_section_name (input_bfd, sec);
4409 }
ffb2e45b 4410
cf5c0c5b
AM		 4411 if (r == bfd_reloc_overflow)
4412 {
cf5c0c5b 4413 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 4414 (info, (h ? &h->root : NULL), name, howto->name,
4415 (bfd_vma) 0, input_bfd, input_section,
4416 rel->r_offset)))
b34976b6 4417 return FALSE;
cf5c0c5b
AM		 4418 }
4419 else
4420 {
4421 (*_bfd_error_handler)
d003868e
AM		 4422 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4423 input_bfd, input_section,
cf5c0c5b 4424 (long) rel->r_offset, name, (int) r);
b34976b6 4425 return FALSE;
cf5c0c5b 4426 }
252b5132
RH		 4427 }
4428 }
4429
b34976b6 4430 return TRUE;
252b5132
RH		 4431}
4432
4433/* Finish up dynamic symbol handling. We set the contents of various
4434 dynamic sections here. */
4435
b34976b6 4436static bfd_boolean
55fd94b0
AM		 4437elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4438 struct bfd_link_info *info,
4439 struct elf_link_hash_entry *h,
4440 Elf_Internal_Sym *sym)
252b5132 4441{
6725bdbf 4442 struct elf_i386_link_hash_table *htab;
25e762b9
RM		 4443 unsigned plt_entry_size;
4444 const struct elf_i386_backend_data *abed;
252b5132 4445
6725bdbf 4446 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 4447 if (htab == NULL)
4448 return FALSE;
252b5132 4449
25e762b9
RM		 4450 abed = get_elf_i386_backend_data (output_bfd);
4451 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4452
252b5132
RH		 4453 if (h->plt.offset != (bfd_vma) -1)
4454 {
252b5132
RH		 4455 bfd_vma plt_index;
4456 bfd_vma got_offset;
947216bf
AM		 4457 Elf_Internal_Rela rel;
4458 bfd_byte *loc;
cbe950e9
L		 4459 asection *plt, *gotplt, *relplt;
4460
4461 /* When building a static executable, use .iplt, .igot.plt and
4462 .rel.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 4463 if (htab->elf.splt != NULL)
cbe950e9 4464 {
6de2ae4a
L		 4465 plt = htab->elf.splt;
4466 gotplt = htab->elf.sgotplt;
4467 relplt = htab->elf.srelplt;
cbe950e9
L		 4468 }
4469 else
4470 {
6de2ae4a
L		 4471 plt = htab->elf.iplt;
4472 gotplt = htab->elf.igotplt;
4473 relplt = htab->elf.irelplt;
cbe950e9 4474 }
252b5132
RH		 4475
4476 /* This symbol has an entry in the procedure linkage table. Set
4477 it up. */
4478
cbe950e9
L		 4479 if ((h->dynindx == -1
4480 && !((h->forced_local || info->executable)
4481 && h->def_regular
4482 && h->type == STT_GNU_IFUNC))
4483 || plt == NULL
4484 || gotplt == NULL
4485 || relplt == NULL)
cec7f46a 4486 abort ();
252b5132
RH		 4487
4488 /* Get the index in the procedure linkage table which
4489 corresponds to this symbol. This is the index of this symbol
4490 in all the symbols for which we are making plt entries. The
cbe950e9 4491 first entry in the procedure linkage table is reserved.
252b5132 4492
cbe950e9 4493 Get the offset into the .got table of the entry that
252b5132 4494 corresponds to this function. Each .got entry is 4 bytes.
cbe950e9 4495 The first three are reserved.
6bbec505 4496
cbe950e9
L		 4497 For static executables, we don't reserve anything. */
4498
6de2ae4a 4499 if (plt == htab->elf.splt)
cbe950e9 4500 {
e1f98742
L		 4501 got_offset = h->plt.offset / plt_entry_size - 1;
4502 got_offset = (got_offset + 3) * 4;
cbe950e9
L		 4503 }
4504 else
4505 {
e1f98742
L		 4506 got_offset = h->plt.offset / plt_entry_size;
4507 got_offset = got_offset * 4;
cbe950e9 4508 }
252b5132
RH		 4509
4510 /* Fill in the entry in the procedure linkage table. */
4511 if (! info->shared)
4512 {
25e762b9
RM		 4513 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4514 abed->plt->plt_entry_size);
252b5132 4515 bfd_put_32 (output_bfd,
cbe950e9
L		 4516 (gotplt->output_section->vma
4517 + gotplt->output_offset
252b5132 4518 + got_offset),
25e762b9
RM		 4519 plt->contents + h->plt.offset
4520 + abed->plt->plt_got_offset);
eac338cf 4521
25e762b9 4522 if (abed->is_vxworks)
eac338cf
PB		 4523 {
4524 int s, k, reloc_index;
4525
4526 /* Create the R_386_32 relocation referencing the GOT
4527 for this PLT entry. */
4528
4529 /* S: Current slot number (zero-based). */
25e762b9
RM		 4530 s = ((h->plt.offset - abed->plt->plt_entry_size)
4531 / abed->plt->plt_entry_size);
eac338cf
PB		 4532 /* K: Number of relocations for PLTResolve. */
4533 if (info->shared)
4534 k = PLTRESOLVE_RELOCS_SHLIB;
4535 else
4536 k = PLTRESOLVE_RELOCS;
4537 /* Skip the PLTresolve relocations, and the relocations for
4538 the other PLT slots. */
4539 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4540 loc = (htab->srelplt2->contents + reloc_index
4541 * sizeof (Elf32_External_Rel));
4542
6de2ae4a
L		 4543 rel.r_offset = (htab->elf.splt->output_section->vma
4544 + htab->elf.splt->output_offset
eac338cf 4545 + h->plt.offset + 2),
7325306f 4546 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 4547 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4548
4549 /* Create the R_386_32 relocation referencing the beginning of
4550 the PLT for this GOT entry. */
6de2ae4a
L		 4551 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4552 + htab->elf.sgotplt->output_offset
eac338cf 4553 + got_offset);
7325306f 4554 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf 4555 bfd_elf32_swap_reloc_out (output_bfd, &rel,
13ca3149 4556 loc + sizeof (Elf32_External_Rel));
eac338cf 4557 }
252b5132
RH		 4558 }
4559 else
4560 {
25e762b9
RM		 4561 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4562 abed->plt->plt_entry_size);
252b5132 4563 bfd_put_32 (output_bfd, got_offset,
25e762b9
RM		 4564 plt->contents + h->plt.offset
4565 + abed->plt->plt_got_offset);
252b5132
RH		 4566 }
4567
252b5132
RH		 4568 /* Fill in the entry in the global offset table. */
4569 bfd_put_32 (output_bfd,
cbe950e9
L		 4570 (plt->output_section->vma
4571 + plt->output_offset
252b5132 4572 + h->plt.offset
25e762b9 4573 + abed->plt->plt_lazy_offset),
cbe950e9 4574 gotplt->contents + got_offset);
252b5132
RH		 4575
4576 /* Fill in the entry in the .rel.plt section. */
cbe950e9
L		 4577 rel.r_offset = (gotplt->output_section->vma
4578 + gotplt->output_offset
252b5132 4579 + got_offset);
cbe950e9
L		 4580 if (h->dynindx == -1
4581 || ((info->executable
4582 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4583 && h->def_regular
4584 && h->type == STT_GNU_IFUNC))
4585 {
4586 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4587 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4588 in the .got.plt section. */
4589 bfd_put_32 (output_bfd,
23209a78 4590 (h->root.u.def.value
cbe950e9
L		 4591 + h->root.u.def.section->output_section->vma
4592 + h->root.u.def.section->output_offset),
4593 gotplt->contents + got_offset);
4594 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
e1f98742
L		 4595 /* R_386_IRELATIVE comes last. */
4596 plt_index = htab->next_irelative_index--;
cbe950e9
L		 4597 }
4598 else
e1f98742
L		 4599 {
4600 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4601 plt_index = htab->next_jump_slot_index++;
4602 }
cbe950e9 4603 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
0ac8d2ca 4604 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132 4605
e1f98742
L		 4606 /* Don't fill PLT entry for static executables. */
4607 if (plt == htab->elf.splt)
4608 {
4609 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4610 plt->contents + h->plt.offset
4611 + abed->plt->plt_reloc_offset);
4612 bfd_put_32 (output_bfd, - (h->plt.offset
4613 + abed->plt->plt_plt_offset + 4),
4614 plt->contents + h->plt.offset
4615 + abed->plt->plt_plt_offset);
4616 }
4617
f5385ebf 4618 if (!h->def_regular)
252b5132
RH		 4619 {
4620 /* Mark the symbol as undefined, rather than as defined in
c6585bbb
JJ		 4621 the .plt section. Leave the value if there were any
4622 relocations where pointer equality matters (this is a clue
51b64d56
AM		 4623 for the dynamic linker, to make function pointer
4624 comparisons work between an application and shared
c6585bbb
JJ		 4625 library), otherwise set it to zero. If a function is only
4626 called from a binary, there is no need to slow down
4627 shared libraries because of that. */
252b5132 4628 sym->st_shndx = SHN_UNDEF;
f5385ebf 4629 if (!h->pointer_equality_needed)
c6585bbb 4630 sym->st_value = 0;
252b5132
RH		 4631 }
4632 }
4633
13ae64f3 4634 if (h->got.offset != (bfd_vma) -1
67a4f2b7 4635 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
37e55690 4636 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
252b5132 4637 {
947216bf 4638 Elf_Internal_Rela rel;
252b5132
RH		 4639
4640 /* This symbol has an entry in the global offset table. Set it
4641 up. */
4642
6de2ae4a 4643 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
ffb2e45b 4644 abort ();
252b5132 4645
6de2ae4a
L		 4646 rel.r_offset = (htab->elf.sgot->output_section->vma
4647 + htab->elf.sgot->output_offset
dc810e39 4648 + (h->got.offset & ~(bfd_vma) 1));
252b5132 4649
dd5724d5
AM		 4650 /* If this is a static link, or it is a -Bsymbolic link and the
4651 symbol is defined locally or was forced to be local because
4652 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 4653 The entry in the global offset table will already have been
4654 initialized in the relocate_section function. */
710ab287 4655 if (h->def_regular
0018b0a3
L		 4656 && h->type == STT_GNU_IFUNC)
4657 {
710ab287
L		 4658 if (info->shared)
4659 {
4660 /* Generate R_386_GLOB_DAT. */
4661 goto do_glob_dat;
4662 }
4663 else
4664 {
cd2b2c10
L		 4665 asection *plt;
4666
710ab287
L		 4667 if (!h->pointer_equality_needed)
4668 abort ();
4669
4670 /* For non-shared object, we can't use .got.plt, which
4671 contains the real function addres if we need pointer
4672 equality. We load the GOT entry with the PLT entry. */
cd2b2c10 4673 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L		 4674 bfd_put_32 (output_bfd,
4675 (plt->output_section->vma
4676 + plt->output_offset + h->plt.offset),
6de2ae4a 4677 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 4678 return TRUE;
4679 }
0018b0a3
L		 4680 }
4681 else if (info->shared
4682 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 4683 {
6725bdbf 4684 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 4685 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4686 }
252b5132
RH		 4687 else
4688 {
dd5724d5 4689 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 4690do_glob_dat:
6725bdbf 4691 bfd_put_32 (output_bfd, (bfd_vma) 0,
6de2ae4a 4692 htab->elf.sgot->contents + h->got.offset);
252b5132
RH		 4693 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4694 }
4695
59d6ffb2 4696 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
252b5132
RH		 4697 }
4698
f5385ebf 4699 if (h->needs_copy)
252b5132 4700 {
947216bf 4701 Elf_Internal_Rela rel;
252b5132
RH		 4702
4703 /* This symbol needs a copy reloc. Set it up. */
4704
ffb2e45b
AM		 4705 if (h->dynindx == -1
4706 || (h->root.type != bfd_link_hash_defined
4707 && h->root.type != bfd_link_hash_defweak)
4708 || htab->srelbss == NULL)
4709 abort ();
252b5132
RH		 4710
4711 rel.r_offset = (h->root.u.def.value
4712 + h->root.u.def.section->output_section->vma
4713 + h->root.u.def.section->output_offset);
4714 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
59d6ffb2 4715 elf_append_rel (output_bfd, htab->srelbss, &rel);
252b5132
RH		 4716 }
4717
b34976b6 4718 return TRUE;
252b5132
RH		 4719}
4720
c25bc9fc
L		 4721/* Finish up local dynamic symbol handling. We set the contents of
4722 various dynamic sections here. */
4723
4724static bfd_boolean
4725elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4726{
4727 struct elf_link_hash_entry *h
4728 = (struct elf_link_hash_entry *) *slot;
4729 struct bfd_link_info *info
23209a78 4730 = (struct bfd_link_info *) inf;
c25bc9fc
L		 4731
4732 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4733 h, NULL);
4734}
4735
38701953
AM		 4736/* Used to decide how to sort relocs in an optimal manner for the
4737 dynamic linker, before writing them out. */
4738
4739static enum elf_reloc_type_class
55fd94b0 4740elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
38701953 4741{
55fd94b0 4742 switch (ELF32_R_TYPE (rela->r_info))
38701953
AM		 4743 {
4744 case R_386_RELATIVE:
4745 return reloc_class_relative;
4746 case R_386_JUMP_SLOT:
4747 return reloc_class_plt;
4748 case R_386_COPY:
4749 return reloc_class_copy;
4750 default:
4751 return reloc_class_normal;
4752 }
4753}
4754
252b5132
RH		 4755/* Finish up the dynamic sections. */
4756
b34976b6 4757static bfd_boolean
55fd94b0
AM		 4758elf_i386_finish_dynamic_sections (bfd *output_bfd,
4759 struct bfd_link_info *info)
252b5132 4760{
6725bdbf 4761 struct elf_i386_link_hash_table *htab;
252b5132 4762 bfd *dynobj;
252b5132 4763 asection *sdyn;
25e762b9 4764 const struct elf_i386_backend_data *abed;
252b5132 4765
6725bdbf 4766 htab = elf_i386_hash_table (info);
4dfe6ac6
NC		 4767 if (htab == NULL)
4768 return FALSE;
4769
ebe50bae 4770 dynobj = htab->elf.dynobj;
3d4d4302 4771 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
25e762b9 4772 abed = get_elf_i386_backend_data (output_bfd);
252b5132 4773
ebe50bae 4774 if (htab->elf.dynamic_sections_created)
252b5132 4775 {
252b5132
RH		 4776 Elf32_External_Dyn *dyncon, *dynconend;
4777
6de2ae4a 4778 if (sdyn == NULL || htab->elf.sgot == NULL)
ffb2e45b 4779 abort ();
252b5132
RH		 4780
4781 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 4782 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 4783 for (; dyncon < dynconend; dyncon++)
4784 {
4785 Elf_Internal_Dyn dyn;
51b64d56 4786 asection *s;
252b5132
RH		 4787
4788 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4789
4790 switch (dyn.d_tag)
4791 {
4792 default:
25e762b9
RM		 4793 if (abed->is_vxworks
4794 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7a2b07ff 4795 break;
0ac8d2ca 4796 continue;
252b5132
RH		 4797
4798 case DT_PLTGOT:
6de2ae4a 4799 s = htab->elf.sgotplt;
8c37241b 4800 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 4801 break;
4802
252b5132 4803 case DT_JMPREL:
6de2ae4a 4804 s = htab->elf.srelplt;
6348e046 4805 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 4806 break;
4807
4808 case DT_PLTRELSZ:
6de2ae4a 4809 s = htab->elf.srelplt;
eea6121a 4810 dyn.d_un.d_val = s->size;
252b5132
RH		 4811 break;
4812
4813 case DT_RELSZ:
4814 /* My reading of the SVR4 ABI indicates that the
4815 procedure linkage table relocs (DT_JMPREL) should be
4816 included in the overall relocs (DT_REL). This is
4817 what Solaris does. However, UnixWare can not handle
4818 that case. Therefore, we override the DT_RELSZ entry
6348e046 4819 here to make it not include the JMPREL relocs. */
6de2ae4a 4820 s = htab->elf.srelplt;
6348e046
AM		 4821 if (s == NULL)
4822 continue;
eea6121a 4823 dyn.d_un.d_val -= s->size;
6348e046
AM		 4824 break;
4825
4826 case DT_REL:
4827 /* We may not be using the standard ELF linker script.
4828 If .rel.plt is the first .rel section, we adjust
4829 DT_REL to not include it. */
6de2ae4a 4830 s = htab->elf.srelplt;
6348e046
AM		 4831 if (s == NULL)
4832 continue;
4833 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4834 continue;
eea6121a 4835 dyn.d_un.d_ptr += s->size;
252b5132
RH		 4836 break;
4837 }
0ac8d2ca
AM		 4838
4839 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 4840 }
4841
4842 /* Fill in the first entry in the procedure linkage table. */
6de2ae4a 4843 if (htab->elf.splt && htab->elf.splt->size > 0)
252b5132
RH		 4844 {
4845 if (info->shared)
eac338cf 4846 {
25e762b9
RM		 4847 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
4848 abed->plt->plt0_entry_size);
4849 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
4850 abed->plt0_pad_byte,
4851 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
eac338cf 4852 }
252b5132
RH		 4853 else
4854 {
25e762b9
RM		 4855 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
4856 abed->plt->plt0_entry_size);
4857 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
4858 abed->plt0_pad_byte,
4859 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
252b5132 4860 bfd_put_32 (output_bfd,
6de2ae4a
L		 4861 (htab->elf.sgotplt->output_section->vma
4862 + htab->elf.sgotplt->output_offset
6725bdbf 4863 + 4),
25e762b9
RM		 4864 htab->elf.splt->contents
4865 + abed->plt->plt0_got1_offset);
252b5132 4866 bfd_put_32 (output_bfd,
6de2ae4a
L		 4867 (htab->elf.sgotplt->output_section->vma
4868 + htab->elf.sgotplt->output_offset
6725bdbf 4869 + 8),
25e762b9
RM		 4870 htab->elf.splt->contents
4871 + abed->plt->plt0_got2_offset);
eac338cf 4872
25e762b9 4873 if (abed->is_vxworks)
eac338cf
PB		 4874 {
4875 Elf_Internal_Rela rel;
7325306f 4876
eac338cf
PB		 4877 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4878 On IA32 we use REL relocations so the addend goes in
4879 the PLT directly. */
6de2ae4a
L		 4880 rel.r_offset = (htab->elf.splt->output_section->vma
4881 + htab->elf.splt->output_offset
25e762b9 4882 + abed->plt->plt0_got1_offset);
7325306f 4883 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 4884 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4885 htab->srelplt2->contents);
4886 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
6de2ae4a
L		 4887 rel.r_offset = (htab->elf.splt->output_section->vma
4888 + htab->elf.splt->output_offset
25e762b9 4889 + abed->plt->plt0_got2_offset);
7325306f 4890 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 4891 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4892 htab->srelplt2->contents +
4893 sizeof (Elf32_External_Rel));
4894 }
252b5132
RH		 4895 }
4896
4897 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4898 really seem like the right value. */
6de2ae4a 4899 elf_section_data (htab->elf.splt->output_section)
6725bdbf 4900 ->this_hdr.sh_entsize = 4;
eac338cf
PB		 4901
4902 /* Correct the .rel.plt.unloaded relocations. */
25e762b9 4903 if (abed->is_vxworks && !info->shared)
eac338cf 4904 {
25e762b9
RM		 4905 int num_plts = (htab->elf.splt->size
4906 / abed->plt->plt_entry_size) - 1;
4c9b0de6 4907 unsigned char *p;
eac338cf
PB		 4908
4909 p = htab->srelplt2->contents;
4910 if (info->shared)
4911 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4912 else
4913 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4914
4915 for (; num_plts; num_plts--)
4916 {
4917 Elf_Internal_Rela rel;
4918 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 4919 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 4920 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4921 p += sizeof (Elf32_External_Rel);
4922
4923 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 4924 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf
PB		 4925 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4926 p += sizeof (Elf32_External_Rel);
4927 }
4928 }
252b5132
RH		 4929 }
4930 }
4931
6de2ae4a 4932 if (htab->elf.sgotplt)
252b5132 4933 {
56d4289c
L		 4934 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4935 {
4936 (*_bfd_error_handler)
4937 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4938 return FALSE;
4939 }
4940
12d0ee4a 4941 /* Fill in the first three entries in the global offset table. */
6de2ae4a 4942 if (htab->elf.sgotplt->size > 0)
12d0ee4a
AM		 4943 {
4944 bfd_put_32 (output_bfd,
55fd94b0 4945 (sdyn == NULL ? 0
12d0ee4a 4946 : sdyn->output_section->vma + sdyn->output_offset),
6de2ae4a
L		 4947 htab->elf.sgotplt->contents);
4948 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4949 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
12d0ee4a 4950 }
252b5132 4951
6de2ae4a 4952 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
12d0ee4a 4953 }
8c37241b 4954
e41b3a13 4955 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 4956 if (htab->plt_eh_frame != NULL
4957 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 4958 {
4959 if (htab->elf.splt != NULL
4960 && htab->elf.splt->size != 0
4961 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4962 && htab->elf.splt->output_section != NULL
4963 && htab->plt_eh_frame->output_section != NULL)
4964 {
4965 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4966 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4967 + htab->plt_eh_frame->output_offset
4968 + PLT_FDE_START_OFFSET;
4969 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4970 htab->plt_eh_frame->contents
4971 + PLT_FDE_START_OFFSET);
4972 }
4973 if (htab->plt_eh_frame->sec_info_type
dbaa2011 4974 == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 4975 {
4976 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4977 htab->plt_eh_frame,
4978 htab->plt_eh_frame->contents))
4979 return FALSE;
4980 }
4981 }
4982
6de2ae4a
L		 4983 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4984 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
8c37241b 4985
c25bc9fc
L		 4986 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4987 htab_traverse (htab->loc_hash_table,
4988 elf_i386_finish_local_dynamic_symbol,
4989 info);
4990
b34976b6 4991 return TRUE;
252b5132
RH		 4992}
4993
4c45e5c9
JJ		 4994/* Return address for Ith PLT stub in section PLT, for relocation REL
4995 or (bfd_vma) -1 if it should not be included. */
4996
4997static bfd_vma
4998elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
4999 const arelent *rel ATTRIBUTE_UNUSED)
5000{
25e762b9 5001 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
4c45e5c9
JJ		 5002}
5003
fdc90cb4
JJ		 5004/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5005
5006static bfd_boolean
5007elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5008{
5009 if (h->plt.offset != (bfd_vma) -1
5010 && !h->def_regular
5011 && !h->pointer_equality_needed)
5012 return FALSE;
5013
5014 return _bfd_elf_hash_symbol (h);
5015}
4c45e5c9 5016
d8045f23
NC		 5017/* Hook called by the linker routine which adds symbols from an object
5018 file. */
5019
5020static bfd_boolean
c16153ae 5021elf_i386_add_symbol_hook (bfd * abfd,
d8045f23
NC		 5022 struct bfd_link_info * info ATTRIBUTE_UNUSED,
5023 Elf_Internal_Sym * sym,
5024 const char ** namep ATTRIBUTE_UNUSED,
5025 flagword * flagsp ATTRIBUTE_UNUSED,
5026 asection ** secp ATTRIBUTE_UNUSED,
5027 bfd_vma * valp ATTRIBUTE_UNUSED)
5028{
c16153ae 5029 if ((abfd->flags & DYNAMIC) == 0
f64b2e8d
NC		 5030 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5031 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
5032 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
d8045f23
NC		 5033
5034 return TRUE;
5035}
5036
252b5132
RH		 5037#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
5038#define TARGET_LITTLE_NAME "elf32-i386"
5039#define ELF_ARCH bfd_arch_i386
ae95ffa6 5040#define ELF_TARGET_ID I386_ELF_DATA
252b5132
RH		 5041#define ELF_MACHINE_CODE EM_386
5042#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 5043
5044#define elf_backend_can_gc_sections 1
51b64d56 5045#define elf_backend_can_refcount 1
252b5132
RH		 5046#define elf_backend_want_got_plt 1
5047#define elf_backend_plt_readonly 1
5048#define elf_backend_want_plt_sym 0
5049#define elf_backend_got_header_size 12
e41b3a13 5050#define elf_backend_plt_alignment 4
252b5132 5051
8c29f035
AM		 5052/* Support RELA for objdump of prelink objects. */
5053#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 5054#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5055
13ae64f3 5056#define bfd_elf32_mkobject elf_i386_mkobject
13ae64f3 5057
dd5724d5
AM		 5058#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5059#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
c25bc9fc 5060#define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
dd5724d5 5061#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
13285a1b 5062#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
dd5724d5
AM		 5063
5064#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
13285a1b 5065#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
dd5724d5 5066#define elf_backend_check_relocs elf_i386_check_relocs
0ac8d2ca 5067#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6725bdbf 5068#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
0ac8d2ca 5069#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 5070#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5071#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5072#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5073#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
c5fccbec
DJ		 5074#define elf_backend_grok_prstatus elf_i386_grok_prstatus
5075#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 5076#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 5077#define elf_backend_relocate_section elf_i386_relocate_section
5078#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
67a4f2b7 5079#define elf_backend_always_size_sections elf_i386_always_size_sections
74541ad4
AM		 5080#define elf_backend_omit_section_dynsym \
5081 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4c45e5c9 5082#define elf_backend_plt_sym_val elf_i386_plt_sym_val
fdc90cb4 5083#define elf_backend_hash_symbol elf_i386_hash_symbol
d8045f23
NC		 5084#define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5085#undef elf_backend_post_process_headers
5086#define elf_backend_post_process_headers _bfd_elf_set_osabi
dd5724d5 5087
252b5132 5088#include "elf32-target.h"
2bc3c89a
AM		 5089
5090/* FreeBSD support. */
5091
5092#undef TARGET_LITTLE_SYM
5093#define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
5094#undef TARGET_LITTLE_NAME
5095#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 5096#undef ELF_OSABI
5097#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 5098
5099/* The kernel recognizes executables as valid only if they carry a
5100 "FreeBSD" label in the ELF header. So we put this label on all
5101 executables and (for simplicity) also all other object files. */
5102
2bc3c89a 5103static void
d8045f23 5104elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
2bc3c89a 5105{
d8045f23 5106 _bfd_elf_set_osabi (abfd, info);
2bc3c89a 5107
2bc3c89a
AM		 5108#ifdef OLD_FREEBSD_ABI_LABEL
5109 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5110 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
caf47ea6 5111#endif
2bc3c89a
AM		 5112}
5113
5114#undef elf_backend_post_process_headers
d8045f23 5115#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
571fe01f
NC		 5116#undef elf32_bed
5117#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a 5118
d8045f23
NC		 5119#undef elf_backend_add_symbol_hook
5120
2bc3c89a 5121#include "elf32-target.h"
eac338cf 5122
a6cc6b3b
RO		 5123/* Solaris 2. */
5124
5125#undef TARGET_LITTLE_SYM
5126#define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
5127#undef TARGET_LITTLE_NAME
5128#define TARGET_LITTLE_NAME "elf32-i386-sol2"
5129
5130/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5131 objects won't be recognized. */
5132#undef ELF_OSABI
5133
5134#undef elf32_bed
5135#define elf32_bed elf32_i386_sol2_bed
5136
7dc98aea
RO		 5137/* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5138 boundary. */
5139#undef elf_backend_static_tls_alignment
5140#define elf_backend_static_tls_alignment 8
5141
a6cc6b3b
RO		 5142/* The Solaris 2 ABI requires a plt symbol on all platforms.
5143
5144 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5145 File, p.63. */
5146#undef elf_backend_want_plt_sym
5147#define elf_backend_want_plt_sym 1
5148
5149#include "elf32-target.h"
5150
a27e4371
RM		 5151/* Native Client support. */
5152
5153#undef TARGET_LITTLE_SYM
5154#define TARGET_LITTLE_SYM bfd_elf32_i386_nacl_vec
5155#undef TARGET_LITTLE_NAME
5156#define TARGET_LITTLE_NAME "elf32-i386-nacl"
5157#undef elf32_bed
5158#define elf32_bed elf32_i386_nacl_bed
5159
5160#undef ELF_MAXPAGESIZE
5161#define ELF_MAXPAGESIZE 0x10000
5162
5163/* Restore defaults. */
5164#undef ELF_OSABI
5165#undef elf_backend_want_plt_sym
5166#define elf_backend_want_plt_sym 0
5167#undef elf_backend_post_process_headers
5168#define elf_backend_post_process_headers _bfd_elf_set_osabi
5169#undef elf_backend_static_tls_alignment
5170
5171/* NaCl uses substantially different PLT entries for the same effects. */
5172
5173#undef elf_backend_plt_alignment
5174#define elf_backend_plt_alignment 5
5175#define NACL_PLT_ENTRY_SIZE 64
5176#define NACLMASK 0xe0 /* 32-byte alignment mask. */
5177
5178static const bfd_byte elf_i386_nacl_plt0_entry[] =
5179 {
5180 0xff, 0x35, /* pushl contents of address */
5181 0, 0, 0, 0, /* replaced with address of .got + 4. */
5182 0x8b, 0x0d, /* movl contents of address, %ecx */
5183 0, 0, 0, 0, /* replaced with address of .got + 8. */
5184 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5185 0xff, 0xe1 /* jmp *%ecx */
5186 };
5187
5188static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5189 {
5190 0x8b, 0x0d, /* movl contents of address, %ecx */
5191 0, 0, 0, 0, /* replaced with GOT slot address. */
5192 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5193 0xff, 0xe1, /* jmp *%ecx */
5194
5195 /* Pad to the next 32-byte boundary with nop instructions. */
5196 0x90,
5197 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5198 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5199
5200 /* Lazy GOT entries point here (32-byte aligned). */
5201 0x68, /* pushl immediate */
5202 0, 0, 0, 0, /* replaced with reloc offset. */
5203 0xe9, /* jmp relative */
5204 0, 0, 0, 0, /* replaced with offset to .plt. */
5205
5206 /* Pad to the next 32-byte boundary with nop instructions. */
5207 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5208 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5209 0x90, 0x90
5210 };
5211
5212static const bfd_byte
5213elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5214 {
5215 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5216 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5217 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5218 0xff, 0xe1, /* jmp *%ecx */
caa0075c
RM		 5219
5220 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5221 so pad to that size with nop instructions. */
5222 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
a27e4371
RM		 5223 };
5224
5225static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5226 {
5227 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5228 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5229 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5230 0xff, 0xe1, /* jmp *%ecx */
5231
5232 /* Pad to the next 32-byte boundary with nop instructions. */
5233 0x90,
5234 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5235 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5236
5237 /* Lazy GOT entries point here (32-byte aligned). */
5238 0x68, /* pushl immediate */
5239 0, 0, 0, 0, /* replaced with offset into relocation table. */
5240 0xe9, /* jmp relative */
5241 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5242
5243 /* Pad to the next 32-byte boundary with nop instructions. */
5244 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5245 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5246 0x90, 0x90
5247 };
5248
5249static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5250 {
5251#if (PLT_CIE_LENGTH != 20 \
5252 || PLT_FDE_LENGTH != 36 \
5253 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5254 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5255# error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5256#endif
5257 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5258 0, 0, 0, 0, /* CIE ID */
5259 1, /* CIE version */
5260 'z', 'R', 0, /* Augmentation string */
5261 1, /* Code alignment factor */
5262 0x7c, /* Data alignment factor: -4 */
5263 8, /* Return address column */
5264 1, /* Augmentation size */
5265 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5266 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5267 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5268 DW_CFA_nop, DW_CFA_nop,
5269
5270 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5271 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5272 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5273 0, 0, 0, 0, /* .plt size goes here */
5274 0, /* Augmentation size */
5275 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5276 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5277 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5278 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5279 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5280 13, /* Block length */
5281 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5282 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5283 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5284 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5285 DW_CFA_nop, DW_CFA_nop
5286 };
5287
5288static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5289 {
5290 elf_i386_nacl_plt0_entry, /* plt0_entry */
5291 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5292 2, /* plt0_got1_offset */
5293 8, /* plt0_got2_offset */
5294 elf_i386_nacl_plt_entry, /* plt_entry */
5295 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5296 2, /* plt_got_offset */
5297 33, /* plt_reloc_offset */
5298 38, /* plt_plt_offset */
5299 32, /* plt_lazy_offset */
5300 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5301 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5302 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5303 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5304 };
5305
5306static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5307 {
5308 &elf_i386_nacl_plt, /* plt */
5309 0x90, /* plt0_pad_byte: nop insn */
5310 0, /* is_vxworks */
5311 };
5312
5313#undef elf_backend_arch_data
5314#define elf_backend_arch_data &elf_i386_nacl_arch_bed
5315
5a68afcf
RM		 5316#undef elf_backend_modify_segment_map
5317#define elf_backend_modify_segment_map nacl_modify_segment_map
5318#undef elf_backend_modify_program_headers
5319#define elf_backend_modify_program_headers nacl_modify_program_headers
5320
a27e4371
RM		 5321#include "elf32-target.h"
5322
5a68afcf
RM		 5323/* Restore defaults. */
5324#undef elf_backend_modify_segment_map
5325#undef elf_backend_modify_program_headers
5326
eac338cf
PB		 5327/* VxWorks support. */
5328
5329#undef TARGET_LITTLE_SYM
5330#define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
5331#undef TARGET_LITTLE_NAME
5332#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 5333#undef ELF_OSABI
a27e4371
RM		 5334#undef elf_backend_plt_alignment
5335#define elf_backend_plt_alignment 4
eac338cf 5336
23209a78
RM		 5337static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5338 {
25e762b9 5339 &elf_i386_plt, /* plt */
23209a78
RM		 5340 0x90, /* plt0_pad_byte */
5341 1, /* is_vxworks */
5342 };
eac338cf 5343
23209a78
RM		 5344#undef elf_backend_arch_data
5345#define elf_backend_arch_data &elf_i386_vxworks_arch_bed
eac338cf 5346
13285a1b
AM		 5347#undef elf_backend_relocs_compatible
5348#undef elf_backend_post_process_headers
eac338cf
PB		 5349#undef elf_backend_add_symbol_hook
5350#define elf_backend_add_symbol_hook \
5351 elf_vxworks_add_symbol_hook
5352#undef elf_backend_link_output_symbol_hook
5353#define elf_backend_link_output_symbol_hook \
9c72ff84 5354 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 5355#undef elf_backend_emit_relocs
5356#define elf_backend_emit_relocs elf_vxworks_emit_relocs
5357#undef elf_backend_final_write_processing
5358#define elf_backend_final_write_processing \
5359 elf_vxworks_final_write_processing
7dc98aea 5360#undef elf_backend_static_tls_alignment
eac338cf
PB		 5361
5362/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5363 define it. */
5364#undef elf_backend_want_plt_sym
5365#define elf_backend_want_plt_sym 1
5366
5367#undef elf32_bed
5368#define elf32_bed elf32_i386_vxworks_bed
5369
5370#include "elf32-target.h"
GDB Binutils - Deliverables
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