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[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,
ab96bf03 3 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
252b5132 4
571fe01f 5 This file is part of BFD, the Binary File Descriptor library.
252b5132 6
571fe01f
NC		 7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
cd123cb7 9 the Free Software Foundation; either version 3 of the License, or
571fe01f 10 (at your option) any later version.
252b5132 11
571fe01f
NC		 12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
252b5132 16
571fe01f
NC		 17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
cd123cb7
NC		 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
252b5132 21
252b5132 22#include "sysdep.h"
3db64b00 23#include "bfd.h"
252b5132
RH		 24#include "bfdlink.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
eac338cf 27#include "elf-vxworks.h"
142411ca 28#include "bfd_stdint.h"
252b5132 29
55fd94b0
AM		 30/* 386 uses REL relocations instead of RELA. */
31#define USE_REL 1
252b5132
RH		 32
33#include "elf/i386.h"
34
35static reloc_howto_type elf_howto_table[]=
36{
b34976b6 37 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
1b452ec6 38 bfd_elf_generic_reloc, "R_386_NONE",
b34976b6
AM		 39 TRUE, 0x00000000, 0x00000000, FALSE),
40 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 41 bfd_elf_generic_reloc, "R_386_32",
b34976b6
AM		 42 TRUE, 0xffffffff, 0xffffffff, FALSE),
43 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 44 bfd_elf_generic_reloc, "R_386_PC32",
b34976b6
AM		 45 TRUE, 0xffffffff, 0xffffffff, TRUE),
46 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 47 bfd_elf_generic_reloc, "R_386_GOT32",
b34976b6
AM		 48 TRUE, 0xffffffff, 0xffffffff, FALSE),
49 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 50 bfd_elf_generic_reloc, "R_386_PLT32",
b34976b6
AM		 51 TRUE, 0xffffffff, 0xffffffff, TRUE),
52 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 53 bfd_elf_generic_reloc, "R_386_COPY",
b34976b6
AM		 54 TRUE, 0xffffffff, 0xffffffff, FALSE),
55 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 56 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
b34976b6
AM		 57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 59 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
b34976b6
AM		 60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 62 bfd_elf_generic_reloc, "R_386_RELATIVE",
b34976b6
AM		 63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 65 bfd_elf_generic_reloc, "R_386_GOTOFF",
b34976b6
AM		 66 TRUE, 0xffffffff, 0xffffffff, FALSE),
67 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 68 bfd_elf_generic_reloc, "R_386_GOTPC",
b34976b6 69 TRUE, 0xffffffff, 0xffffffff, TRUE),
1b452ec6 70
dc47f327
AM		 71 /* We have a gap in the reloc numbers here.
72 R_386_standard counts the number up to this point, and
73 R_386_ext_offset is the value to subtract from a reloc type of
74 R_386_16 thru R_386_PC8 to form an index into this table. */
55fd94b0
AM		 75#define R_386_standard (R_386_GOTPC + 1)
76#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
1b452ec6 77
37e55690 78 /* These relocs are a GNU extension. */
b34976b6 79 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 80 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
b34976b6
AM		 81 TRUE, 0xffffffff, 0xffffffff, FALSE),
82 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 83 bfd_elf_generic_reloc, "R_386_TLS_IE",
b34976b6
AM		 84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 86 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
b34976b6
AM		 87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 89 bfd_elf_generic_reloc, "R_386_TLS_LE",
b34976b6
AM		 90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 92 bfd_elf_generic_reloc, "R_386_TLS_GD",
b34976b6
AM		 93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 95 bfd_elf_generic_reloc, "R_386_TLS_LDM",
b34976b6
AM		 96 TRUE, 0xffffffff, 0xffffffff, FALSE),
97 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
1b452ec6 98 bfd_elf_generic_reloc, "R_386_16",
b34976b6 99 TRUE, 0xffff, 0xffff, FALSE),
b0360d8c 100 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
1b452ec6 101 bfd_elf_generic_reloc, "R_386_PC16",
b34976b6
AM		 102 TRUE, 0xffff, 0xffff, TRUE),
103 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
1b452ec6 104 bfd_elf_generic_reloc, "R_386_8",
b34976b6
AM		 105 TRUE, 0xff, 0xff, FALSE),
106 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
1b452ec6 107 bfd_elf_generic_reloc, "R_386_PC8",
b34976b6 108 TRUE, 0xff, 0xff, TRUE),
dc47f327 109
55fd94b0
AM		 110#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
111#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
13ae64f3 112 /* These are common with Solaris TLS implementation. */
b34976b6 113 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 114 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
b34976b6
AM		 115 TRUE, 0xffffffff, 0xffffffff, FALSE),
116 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 117 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
b34976b6
AM		 118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 120 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
b34976b6
AM		 121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 123 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
b34976b6
AM		 124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 126 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
b34976b6
AM		 127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 129 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
b34976b6 130 TRUE, 0xffffffff, 0xffffffff, FALSE),
67a4f2b7
AO		 131 EMPTY_HOWTO (38),
132 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
134 TRUE, 0xffffffff, 0xffffffff, FALSE),
135 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
137 FALSE, 0, 0, FALSE),
138 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_386_TLS_DESC",
140 TRUE, 0xffffffff, 0xffffffff, FALSE),
13ae64f3
JJ		 141
142 /* Another gap. */
67a4f2b7 143#define R_386_tls (R_386_TLS_DESC + 1 - R_386_tls_offset)
55fd94b0 144#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
252b5132
RH		 145
146/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH		 147 HOWTO (R_386_GNU_VTINHERIT, /* type */
148 0, /* rightshift */
149 2, /* size (0 = byte, 1 = short, 2 = long) */
150 0, /* bitsize */
b34976b6 151 FALSE, /* pc_relative */
252b5132
RH		 152 0, /* bitpos */
153 complain_overflow_dont, /* complain_on_overflow */
154 NULL, /* special_function */
155 "R_386_GNU_VTINHERIT", /* name */
b34976b6 156 FALSE, /* partial_inplace */
252b5132
RH		 157 0, /* src_mask */
158 0, /* dst_mask */
b34976b6 159 FALSE), /* pcrel_offset */
252b5132
RH		 160
161/* GNU extension to record C++ vtable member usage. */
252b5132
RH		 162 HOWTO (R_386_GNU_VTENTRY, /* type */
163 0, /* rightshift */
164 2, /* size (0 = byte, 1 = short, 2 = long) */
165 0, /* bitsize */
b34976b6 166 FALSE, /* pc_relative */
252b5132
RH		 167 0, /* bitpos */
168 complain_overflow_dont, /* complain_on_overflow */
169 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
170 "R_386_GNU_VTENTRY", /* name */
b34976b6 171 FALSE, /* partial_inplace */
252b5132
RH		 172 0, /* src_mask */
173 0, /* dst_mask */
b34976b6 174 FALSE) /* pcrel_offset */
dc47f327 175
55fd94b0 176#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
dc47f327
AM		 177
178};
179
252b5132 180#ifdef DEBUG_GEN_RELOC
55fd94b0
AM		 181#define TRACE(str) \
182 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH		 183#else
184#define TRACE(str)
185#endif
186
187static reloc_howto_type *
55fd94b0
AM		 188elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
189 bfd_reloc_code_real_type code)
252b5132
RH		 190{
191 switch (code)
192 {
193 case BFD_RELOC_NONE:
194 TRACE ("BFD_RELOC_NONE");
55fd94b0 195 return &elf_howto_table[R_386_NONE];
252b5132
RH		 196
197 case BFD_RELOC_32:
198 TRACE ("BFD_RELOC_32");
55fd94b0 199 return &elf_howto_table[R_386_32];
252b5132
RH		 200
201 case BFD_RELOC_CTOR:
202 TRACE ("BFD_RELOC_CTOR");
55fd94b0 203 return &elf_howto_table[R_386_32];
252b5132
RH		 204
205 case BFD_RELOC_32_PCREL:
206 TRACE ("BFD_RELOC_PC32");
55fd94b0 207 return &elf_howto_table[R_386_PC32];
252b5132
RH		 208
209 case BFD_RELOC_386_GOT32:
210 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 211 return &elf_howto_table[R_386_GOT32];
252b5132
RH		 212
213 case BFD_RELOC_386_PLT32:
214 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 215 return &elf_howto_table[R_386_PLT32];
252b5132
RH		 216
217 case BFD_RELOC_386_COPY:
218 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 219 return &elf_howto_table[R_386_COPY];
252b5132
RH		 220
221 case BFD_RELOC_386_GLOB_DAT:
222 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 223 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH		 224
225 case BFD_RELOC_386_JUMP_SLOT:
226 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 227 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH		 228
229 case BFD_RELOC_386_RELATIVE:
230 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 231 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH		 232
233 case BFD_RELOC_386_GOTOFF:
234 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 235 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH		 236
237 case BFD_RELOC_386_GOTPC:
238 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 239 return &elf_howto_table[R_386_GOTPC];
252b5132 240
37e55690
JJ		 241 /* These relocs are a GNU extension. */
242 case BFD_RELOC_386_TLS_TPOFF:
243 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 244 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ		 245
246 case BFD_RELOC_386_TLS_IE:
247 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 248 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ		 249
250 case BFD_RELOC_386_TLS_GOTIE:
251 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 252 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 253
13ae64f3
JJ		 254 case BFD_RELOC_386_TLS_LE:
255 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 256 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ		 257
258 case BFD_RELOC_386_TLS_GD:
259 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 260 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ		 261
262 case BFD_RELOC_386_TLS_LDM:
263 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 264 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 265
252b5132
RH		 266 case BFD_RELOC_16:
267 TRACE ("BFD_RELOC_16");
55fd94b0 268 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH		 269
270 case BFD_RELOC_16_PCREL:
271 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 272 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH		 273
274 case BFD_RELOC_8:
275 TRACE ("BFD_RELOC_8");
55fd94b0 276 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH		 277
278 case BFD_RELOC_8_PCREL:
279 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 280 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 281
13ae64f3
JJ		 282 /* Common with Sun TLS implementation. */
283 case BFD_RELOC_386_TLS_LDO_32:
284 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 285 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ		 286
287 case BFD_RELOC_386_TLS_IE_32:
288 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 289 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ		 290
291 case BFD_RELOC_386_TLS_LE_32:
292 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 293 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ		 294
295 case BFD_RELOC_386_TLS_DTPMOD32:
296 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 297 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ		 298
299 case BFD_RELOC_386_TLS_DTPOFF32:
300 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 301 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ		 302
303 case BFD_RELOC_386_TLS_TPOFF32:
304 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 305 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 306
67a4f2b7
AO		 307 case BFD_RELOC_386_TLS_GOTDESC:
308 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
309 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
310
311 case BFD_RELOC_386_TLS_DESC_CALL:
312 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
313 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
314
315 case BFD_RELOC_386_TLS_DESC:
316 TRACE ("BFD_RELOC_386_TLS_DESC");
317 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
318
252b5132
RH		 319 case BFD_RELOC_VTABLE_INHERIT:
320 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 321 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH		 322
323 case BFD_RELOC_VTABLE_ENTRY:
324 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 325 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH		 326
327 default:
328 break;
329 }
330
331 TRACE ("Unknown");
332 return 0;
333}
334
157090f7
AM		 335static reloc_howto_type *
336elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
337 const char *r_name)
338{
339 unsigned int i;
340
341 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
342 if (elf_howto_table[i].name != NULL
343 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
344 return &elf_howto_table[i];
345
346 return NULL;
347}
348
142411ca
L		 349static reloc_howto_type *
350elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
252b5132 351{
dc47f327
AM		 352 unsigned int indx;
353
354 if ((indx = r_type) >= R_386_standard
355 && ((indx = r_type - R_386_ext_offset) - R_386_standard
356 >= R_386_ext - R_386_standard)
13ae64f3
JJ		 357 && ((indx = r_type - R_386_tls_offset) - R_386_ext
358 >= R_386_tls - R_386_ext)
359 && ((indx = r_type - R_386_vt_offset) - R_386_tls
360 >= R_386_vt - R_386_tls))
252b5132 361 {
d003868e
AM		 362 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
363 abfd, (int) r_type);
55fd94b0 364 indx = R_386_NONE;
252b5132 365 }
142411ca
L		 366 BFD_ASSERT (elf_howto_table [indx].type == r_type);
367 return &elf_howto_table[indx];
368}
369
370static void
371elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
372 arelent *cache_ptr,
373 Elf_Internal_Rela *dst)
374{
375 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
376 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
252b5132
RH		 377}
378
379/* Return whether a symbol name implies a local label. The UnixWare
380 2.1 cc generates temporary symbols that start with .X, so we
381 recognize them here. FIXME: do other SVR4 compilers also use .X?.
382 If so, we should move the .X recognition into
383 _bfd_elf_is_local_label_name. */
384
b34976b6 385static bfd_boolean
55fd94b0 386elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH		 387{
388 if (name[0] == '.' && name[1] == 'X')
b34976b6 389 return TRUE;
252b5132
RH		 390
391 return _bfd_elf_is_local_label_name (abfd, name);
392}
393\f
38701953 394/* Support for core dump NOTE sections. */
61adc1a4 395
b34976b6 396static bfd_boolean
55fd94b0 397elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM		 398{
399 int offset;
eea6121a 400 size_t size;
38701953 401
61adc1a4 402 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 403 {
61adc1a4
NC		 404 int pr_version = bfd_get_32 (abfd, note->descdata);
405
406 if (pr_version != 1)
407 return FALSE;
408
409 /* pr_cursig */
410 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
411
412 /* pr_pid */
413 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
414
415 /* pr_reg */
416 offset = 28;
eea6121a 417 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC		 418 }
419 else
420 {
421 switch (note->descsz)
422 {
423 default:
424 return FALSE;
38701953 425
61adc1a4
NC		 426 case 144: /* Linux/i386 */
427 /* pr_cursig */
428 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 429
61adc1a4
NC		 430 /* pr_pid */
431 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
38701953 432
61adc1a4
NC		 433 /* pr_reg */
434 offset = 72;
eea6121a 435 size = 68;
38701953 436
61adc1a4
NC		 437 break;
438 }
38701953
AM		 439 }
440
441 /* Make a ".reg/999" section. */
442 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 443 size, note->descpos + offset);
38701953
AM		 444}
445
b34976b6 446static bfd_boolean
55fd94b0 447elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 448{
61adc1a4 449 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 450 {
61adc1a4
NC		 451 int pr_version = bfd_get_32 (abfd, note->descdata);
452
453 if (pr_version != 1)
b34976b6 454 return FALSE;
38701953 455
61adc1a4
NC		 456 elf_tdata (abfd)->core_program
457 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
458 elf_tdata (abfd)->core_command
459 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
460 }
461 else
462 {
463 switch (note->descsz)
464 {
465 default:
466 return FALSE;
467
468 case 124: /* Linux/i386 elf_prpsinfo. */
469 elf_tdata (abfd)->core_program
470 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
471 elf_tdata (abfd)->core_command
472 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
473 }
38701953
AM		 474 }
475
476 /* Note that for some reason, a spurious space is tacked
477 onto the end of the args in some (at least one anyway)
478 implementations, so strip it off if it exists. */
38701953
AM		 479 {
480 char *command = elf_tdata (abfd)->core_command;
481 int n = strlen (command);
482
483 if (0 < n && command[n - 1] == ' ')
484 command[n - 1] = '\0';
485 }
486
b34976b6 487 return TRUE;
38701953
AM		 488}
489\f
490/* Functions for the i386 ELF linker.
491
492 In order to gain some understanding of code in this file without
493 knowing all the intricate details of the linker, note the
494 following:
495
496 Functions named elf_i386_* are called by external routines, other
497 functions are only called locally. elf_i386_* functions appear
498 in this file more or less in the order in which they are called
499 from external routines. eg. elf_i386_check_relocs is called
500 early in the link process, elf_i386_finish_dynamic_sections is
501 one of the last functions. */
502
252b5132
RH		 503
504/* The name of the dynamic interpreter. This is put in the .interp
505 section. */
506
507#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
508
a23b6845
AM		 509/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
510 copying dynamic variables from a shared lib into an app's dynbss
511 section, and instead use a dynamic relocation to point into the
512 shared lib. */
513#define ELIMINATE_COPY_RELOCS 1
514
252b5132
RH		 515/* The size in bytes of an entry in the procedure linkage table. */
516
517#define PLT_ENTRY_SIZE 16
518
519/* The first entry in an absolute procedure linkage table looks like
eac338cf
PB		 520 this. See the SVR4 ABI i386 supplement to see how this works.
521 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 522
eac338cf 523static const bfd_byte elf_i386_plt0_entry[12] =
252b5132
RH		 524{
525 0xff, 0x35, /* pushl contents of address */
526 0, 0, 0, 0, /* replaced with address of .got + 4. */
527 0xff, 0x25, /* jmp indirect */
eac338cf 528 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 529};
530
531/* Subsequent entries in an absolute procedure linkage table look like
532 this. */
533
534static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
535{
536 0xff, 0x25, /* jmp indirect */
537 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
538 0x68, /* pushl immediate */
539 0, 0, 0, 0, /* replaced with offset into relocation table. */
540 0xe9, /* jmp relative */
541 0, 0, 0, 0 /* replaced with offset to start of .plt. */
542};
543
eac338cf
PB		 544/* The first entry in a PIC procedure linkage table look like this.
545 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 546
eac338cf 547static const bfd_byte elf_i386_pic_plt0_entry[12] =
252b5132
RH		 548{
549 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 550 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 551};
552
553/* Subsequent entries in a PIC procedure linkage table look like this. */
554
555static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
556{
557 0xff, 0xa3, /* jmp *offset(%ebx) */
558 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
559 0x68, /* pushl immediate */
560 0, 0, 0, 0, /* replaced with offset into relocation table. */
561 0xe9, /* jmp relative */
562 0, 0, 0, 0 /* replaced with offset to start of .plt. */
563};
564
eac338cf
PB		 565/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
566 for the PLTResolve stub and then for each PLT entry. */
567#define PLTRESOLVE_RELOCS_SHLIB 0
568#define PLTRESOLVE_RELOCS 2
569#define PLT_NON_JUMP_SLOT_RELOCS 2
570
252b5132 571/* The i386 linker needs to keep track of the number of relocs that it
ffb2e45b
AM		 572 decides to copy as dynamic relocs in check_relocs for each symbol.
573 This is so that it can later discard them if they are found to be
574 unnecessary. We store the information in a field extending the
575 regular ELF linker hash table. */
252b5132 576
ffb2e45b 577struct elf_i386_dyn_relocs
252b5132 578{
ffb2e45b 579 struct elf_i386_dyn_relocs *next;
0c715baa
AM		 580
581 /* The input section of the reloc. */
582 asection *sec;
583
584 /* Total number of relocs copied for the input section. */
252b5132 585 bfd_size_type count;
0c715baa
AM		 586
587 /* Number of pc-relative relocs copied for the input section. */
588 bfd_size_type pc_count;
252b5132
RH		 589};
590
591/* i386 ELF linker hash entry. */
592
593struct elf_i386_link_hash_entry
594{
ebe50bae 595 struct elf_link_hash_entry elf;
252b5132 596
0c715baa 597 /* Track dynamic relocs copied for this symbol. */
ffb2e45b 598 struct elf_i386_dyn_relocs *dyn_relocs;
13ae64f3 599
37e55690
JJ		 600#define GOT_UNKNOWN 0
601#define GOT_NORMAL 1
602#define GOT_TLS_GD 2
603#define GOT_TLS_IE 4
604#define GOT_TLS_IE_POS 5
605#define GOT_TLS_IE_NEG 6
606#define GOT_TLS_IE_BOTH 7
67a4f2b7
AO		 607#define GOT_TLS_GDESC 8
608#define GOT_TLS_GD_BOTH_P(type) \
609 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
610#define GOT_TLS_GD_P(type) \
611 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
612#define GOT_TLS_GDESC_P(type) \
613 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
614#define GOT_TLS_GD_ANY_P(type) \
615 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
37e55690 616 unsigned char tls_type;
67a4f2b7
AO		 617
618 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
619 starting at the end of the jump table. */
620 bfd_vma tlsdesc_got;
13ae64f3
JJ		 621};
622
623#define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
624
625struct elf_i386_obj_tdata
626{
627 struct elf_obj_tdata root;
628
629 /* tls_type for each local got entry. */
630 char *local_got_tls_type;
67a4f2b7
AO		 631
632 /* GOTPLT entries for TLS descriptors. */
633 bfd_vma *local_tlsdesc_gotent;
252b5132
RH		 634};
635
13ae64f3
JJ		 636#define elf_i386_tdata(abfd) \
637 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
638
639#define elf_i386_local_got_tls_type(abfd) \
640 (elf_i386_tdata (abfd)->local_got_tls_type)
641
67a4f2b7
AO		 642#define elf_i386_local_tlsdesc_gotent(abfd) \
643 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
644
b34976b6 645static bfd_boolean
55fd94b0 646elf_i386_mkobject (bfd *abfd)
13ae64f3 647{
13ae64f3 648 if (abfd->tdata.any == NULL)
62d7a5f6
AM		 649 {
650 bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
651 abfd->tdata.any = bfd_zalloc (abfd, amt);
652 if (abfd->tdata.any == NULL)
653 return FALSE;
654 }
655 return bfd_elf_mkobject (abfd);
13ae64f3 656}
cedb70c5 657
252b5132
RH		 658/* i386 ELF linker hash table. */
659
660struct elf_i386_link_hash_table
661{
ebe50bae 662 struct elf_link_hash_table elf;
252b5132 663
6725bdbf
AM		 664 /* Short-cuts to get to dynamic linker sections. */
665 asection *sgot;
666 asection *sgotplt;
667 asection *srelgot;
668 asection *splt;
669 asection *srelplt;
670 asection *sdynbss;
671 asection *srelbss;
9635fe29 672
eac338cf
PB		 673 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
674 asection *srelplt2;
675
eac338cf
PB		 676 /* True if the target system is VxWorks. */
677 int is_vxworks;
ec338859 678
eac338cf
PB		 679 /* Value used to fill the last word of the first plt entry. */
680 bfd_byte plt0_pad_byte;
9635fe29 681
5ae0bfb6
RS		 682 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
683 bfd_vma next_tls_desc_index;
684
13ae64f3
JJ		 685 union {
686 bfd_signed_vma refcount;
687 bfd_vma offset;
688 } tls_ldm_got;
689
67a4f2b7
AO		 690 /* The amount of space used by the reserved portion of the sgotplt
691 section, plus whatever space is used by the jump slots. */
692 bfd_vma sgotplt_jump_table_size;
693
ec338859
AM		 694 /* Small local sym to section mapping cache. */
695 struct sym_sec_cache sym_sec;
6725bdbf 696};
252b5132
RH		 697
698/* Get the i386 ELF linker hash table from a link_info structure. */
699
700#define elf_i386_hash_table(p) \
701 ((struct elf_i386_link_hash_table *) ((p)->hash))
702
67a4f2b7 703#define elf_i386_compute_jump_table_size(htab) \
5ae0bfb6 704 ((htab)->next_tls_desc_index * 4)
67a4f2b7 705
252b5132
RH		 706/* Create an entry in an i386 ELF linker hash table. */
707
708static struct bfd_hash_entry *
55fd94b0
AM		 709link_hash_newfunc (struct bfd_hash_entry *entry,
710 struct bfd_hash_table *table,
711 const char *string)
252b5132 712{
252b5132
RH		 713 /* Allocate the structure if it has not already been allocated by a
714 subclass. */
ebe50bae
AM		 715 if (entry == NULL)
716 {
717 entry = bfd_hash_allocate (table,
718 sizeof (struct elf_i386_link_hash_entry));
719 if (entry == NULL)
720 return entry;
721 }
252b5132
RH		 722
723 /* Call the allocation method of the superclass. */
ebe50bae
AM		 724 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
725 if (entry != NULL)
252b5132 726 {
ebe50bae
AM		 727 struct elf_i386_link_hash_entry *eh;
728
729 eh = (struct elf_i386_link_hash_entry *) entry;
730 eh->dyn_relocs = NULL;
13ae64f3 731 eh->tls_type = GOT_UNKNOWN;
67a4f2b7 732 eh->tlsdesc_got = (bfd_vma) -1;
252b5132
RH		 733 }
734
ebe50bae 735 return entry;
252b5132
RH		 736}
737
738/* Create an i386 ELF linker hash table. */
739
740static struct bfd_link_hash_table *
55fd94b0 741elf_i386_link_hash_table_create (bfd *abfd)
252b5132
RH		 742{
743 struct elf_i386_link_hash_table *ret;
dc810e39 744 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
252b5132 745
55fd94b0 746 ret = bfd_malloc (amt);
ebe50bae 747 if (ret == NULL)
252b5132
RH		 748 return NULL;
749
66eb6687
AM		 750 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
751 sizeof (struct elf_i386_link_hash_entry)))
252b5132 752 {
e2d34d7d 753 free (ret);
252b5132
RH		 754 return NULL;
755 }
756
6725bdbf
AM		 757 ret->sgot = NULL;
758 ret->sgotplt = NULL;
759 ret->srelgot = NULL;
760 ret->splt = NULL;
761 ret->srelplt = NULL;
762 ret->sdynbss = NULL;
763 ret->srelbss = NULL;
7a624474 764 ret->tls_ldm_got.refcount = 0;
5ae0bfb6 765 ret->next_tls_desc_index = 0;
67a4f2b7 766 ret->sgotplt_jump_table_size = 0;
ec338859 767 ret->sym_sec.abfd = NULL;
eac338cf
PB		 768 ret->is_vxworks = 0;
769 ret->srelplt2 = NULL;
eac338cf 770 ret->plt0_pad_byte = 0;
6725bdbf 771
ebe50bae 772 return &ret->elf.root;
252b5132
RH		 773}
774
6725bdbf
AM		 775/* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
776 shortcuts to them in our hash table. */
777
b34976b6 778static bfd_boolean
55fd94b0 779create_got_section (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM		 780{
781 struct elf_i386_link_hash_table *htab;
782
783 if (! _bfd_elf_create_got_section (dynobj, info))
b34976b6 784 return FALSE;
6725bdbf
AM		 785
786 htab = elf_i386_hash_table (info);
787 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
788 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
789 if (!htab->sgot || !htab->sgotplt)
790 abort ();
791
3496cb2a
L		 792 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
793 (SEC_ALLOC | SEC_LOAD
794 | SEC_HAS_CONTENTS
795 | SEC_IN_MEMORY
796 | SEC_LINKER_CREATED
797 | SEC_READONLY));
6725bdbf 798 if (htab->srelgot == NULL
6725bdbf 799 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
b34976b6
AM		 800 return FALSE;
801 return TRUE;
6725bdbf
AM		 802}
803
804/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
805 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
806 hash table. */
807
b34976b6 808static bfd_boolean
55fd94b0 809elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM		 810{
811 struct elf_i386_link_hash_table *htab;
812
813 htab = elf_i386_hash_table (info);
814 if (!htab->sgot && !create_got_section (dynobj, info))
b34976b6 815 return FALSE;
6725bdbf
AM		 816
817 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 818 return FALSE;
6725bdbf
AM		 819
820 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
821 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
822 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
823 if (!info->shared)
824 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
825
826 if (!htab->splt || !htab->srelplt || !htab->sdynbss
827 || (!info->shared && !htab->srelbss))
828 abort ();
829
711de32c
RS		 830 if (htab->is_vxworks
831 && !elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
832 return FALSE;
eac338cf 833
b34976b6 834 return TRUE;
6725bdbf
AM		 835}
836
ebe50bae
AM		 837/* Copy the extra info we tack onto an elf_link_hash_entry. */
838
51b64d56 839static void
fcfa13d2 840elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
55fd94b0
AM		 841 struct elf_link_hash_entry *dir,
842 struct elf_link_hash_entry *ind)
ebe50bae
AM		 843{
844 struct elf_i386_link_hash_entry *edir, *eind;
845
846 edir = (struct elf_i386_link_hash_entry *) dir;
847 eind = (struct elf_i386_link_hash_entry *) ind;
848
bbd7ec4a 849 if (eind->dyn_relocs != NULL)
ebe50bae 850 {
bbd7ec4a
AM		 851 if (edir->dyn_relocs != NULL)
852 {
853 struct elf_i386_dyn_relocs **pp;
854 struct elf_i386_dyn_relocs *p;
855
fcfa13d2 856 /* Add reloc counts against the indirect sym to the direct sym
bbd7ec4a
AM		 857 list. Merge any entries against the same section. */
858 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
859 {
860 struct elf_i386_dyn_relocs *q;
861
862 for (q = edir->dyn_relocs; q != NULL; q = q->next)
863 if (q->sec == p->sec)
864 {
865 q->pc_count += p->pc_count;
866 q->count += p->count;
867 *pp = p->next;
868 break;
869 }
870 if (q == NULL)
871 pp = &p->next;
872 }
873 *pp = edir->dyn_relocs;
874 }
875
ebe50bae
AM		 876 edir->dyn_relocs = eind->dyn_relocs;
877 eind->dyn_relocs = NULL;
878 }
ebe50bae 879
cd67d266
JJ		 880 if (ind->root.type == bfd_link_hash_indirect
881 && dir->got.refcount <= 0)
882 {
883 edir->tls_type = eind->tls_type;
884 eind->tls_type = GOT_UNKNOWN;
885 }
81848ca0
AM		 886
887 if (ELIMINATE_COPY_RELOCS
888 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 889 && dir->dynamic_adjusted)
890 {
891 /* If called to transfer flags for a weakdef during processing
892 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
893 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
894 dir->ref_dynamic |= ind->ref_dynamic;
895 dir->ref_regular |= ind->ref_regular;
896 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
897 dir->needs_plt |= ind->needs_plt;
898 dir->pointer_equality_needed |= ind->pointer_equality_needed;
899 }
81848ca0 900 else
fcfa13d2 901 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
ebe50bae
AM		 902}
903
142411ca
L		 904typedef union
905 {
906 unsigned char c[2];
907 uint16_t i;
908 }
909i386_opcode16;
910
911/* Return TRUE if the TLS access code sequence support transition
912 from R_TYPE. */
913
914static bfd_boolean
915elf_i386_check_tls_transition (bfd *abfd, asection *sec,
916 bfd_byte *contents,
917 Elf_Internal_Shdr *symtab_hdr,
918 struct elf_link_hash_entry **sym_hashes,
919 unsigned int r_type,
920 const Elf_Internal_Rela *rel,
921 const Elf_Internal_Rela *relend)
13ae64f3 922{
142411ca
L		 923 unsigned int val, type;
924 unsigned long r_symndx;
925 struct elf_link_hash_entry *h;
926 bfd_vma offset;
927
928 /* Get the section contents. */
929 if (contents == NULL)
930 {
931 if (elf_section_data (sec)->this_hdr.contents != NULL)
932 contents = elf_section_data (sec)->this_hdr.contents;
933 else
934 {
935 /* FIXME: How to better handle error condition? */
936 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
937 return FALSE;
13ae64f3 938
142411ca
L		 939 /* Cache the section contents for elf_link_input_bfd. */
940 elf_section_data (sec)->this_hdr.contents = contents;
941 }
942 }
943
944 offset = rel->r_offset;
13ae64f3 945 switch (r_type)
142411ca
L		 946 {
947 case R_386_TLS_GD:
948 case R_386_TLS_LDM:
949 if (offset < 2 || (rel + 1) >= relend)
950 return FALSE;
951
952 type = bfd_get_8 (abfd, contents + offset - 2);
953 if (r_type == R_386_TLS_GD)
954 {
955 /* Check transition from LD access model. Only
956 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
957 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
958 can transit to different access model. */
959 if ((offset + 10) > sec->size ||
960 (type != 0x8d && type != 0x04))
961 return FALSE;
962
963 val = bfd_get_8 (abfd, contents + offset - 1);
964 if (type == 0x04)
965 {
966 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
967 if (offset < 3)
968 return FALSE;
969
970 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
971 return FALSE;
972
973 if ((val & 0xc7) != 0x05 || val == (4 << 3))
974 return FALSE;
975 }
976 else
977 {
978 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
979 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
980 return FALSE;
981
982 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
983 return FALSE;
984 }
985 }
986 else
987 {
988 /* Check transition from LD access model. Only
989 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
990 can transit to different access model. */
991 if (type != 0x8d || (offset + 9) > sec->size)
992 return FALSE;
993
994 val = bfd_get_8 (abfd, contents + offset - 1);
995 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
996 return FALSE;
997 }
998
999 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1000 return FALSE;
1001
1002 r_symndx = ELF32_R_SYM (rel[1].r_info);
1003 if (r_symndx < symtab_hdr->sh_info)
1004 return FALSE;
1005
1006 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1007 return (h != NULL
1008 && h->root.root.string != NULL
1009 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1010 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1011 && (strcmp (h->root.root.string, "___tls_get_addr") == 0));
1012
1013 case R_386_TLS_IE:
1014 /* Check transition from IE access model:
1015 movl foo@indntpoff(%rip), %eax
1016 movl foo@indntpoff(%rip), %reg
1017 addl foo@indntpoff(%rip), %reg
1018 */
1019
1020 if (offset < 1 || (offset + 4) > sec->size)
1021 return FALSE;
1022
1023 /* Check "movl foo@tpoff(%rip), %eax" first. */
1024 val = bfd_get_8 (abfd, contents + offset - 1);
1025 if (val == 0xa1)
1026 return TRUE;
1027
1028 if (offset < 2)
1029 return FALSE;
1030
1031 /* Check movl|addl foo@tpoff(%rip), %reg. */
1032 type = bfd_get_8 (abfd, contents + offset - 2);
1033 return ((type == 0x8b || type == 0x03)
1034 && (val & 0xc7) == 0x05);
1035
1036 case R_386_TLS_GOTIE:
1037 case R_386_TLS_IE_32:
1038 /* Check transition from {IE_32,GOTIE} access model:
1039 subl foo@{tpoff,gontoff}(%reg1), %reg2
1040 movl foo@{tpoff,gontoff}(%reg1), %reg2
1041 addl foo@{tpoff,gontoff}(%reg1), %reg2
1042 */
1043
1044 if (offset < 2 || (offset + 4) > sec->size)
1045 return FALSE;
1046
1047 val = bfd_get_8 (abfd, contents + offset - 1);
1048 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1049 return FALSE;
1050
1051 type = bfd_get_8 (abfd, contents + offset - 2);
1052 return type == 0x8b || type == 0x2b || type == 0x03;
1053
1054 case R_386_TLS_GOTDESC:
1055 /* Check transition from GDesc access model:
1056 leal x@tlsdesc(%ebx), %eax
1057
1058 Make sure it's a leal adding ebx to a 32-bit offset
1059 into any register, although it's probably almost always
1060 going to be eax. */
1061
1062 if (offset < 2 || (offset + 4) > sec->size)
1063 return FALSE;
1064
1065 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1066 return FALSE;
1067
1068 val = bfd_get_8 (abfd, contents + offset - 1);
1069 return (val & 0xc7) == 0x83;
1070
1071 case R_386_TLS_DESC_CALL:
1072 /* Check transition from GDesc access model:
1073 call *x@tlsdesc(%rax)
1074 */
1075 if (offset + 2 <= sec->size)
1076 {
1077 /* Make sure that it's a call *x@tlsdesc(%rax). */
1078 static i386_opcode16 call = { { 0xff, 0x10 } };
1079 return bfd_get_16 (abfd, contents + offset) == call.i;
1080 }
1081
1082 return FALSE;
1083
1084 default:
1085 abort ();
1086 }
1087}
1088
1089/* Return TRUE if the TLS access transition is OK or no transition
1090 will be performed. Update R_TYPE if there is a transition. */
1091
1092static bfd_boolean
1093elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1094 asection *sec, bfd_byte *contents,
1095 Elf_Internal_Shdr *symtab_hdr,
1096 struct elf_link_hash_entry **sym_hashes,
1097 unsigned int *r_type, int tls_type,
1098 const Elf_Internal_Rela *rel,
1099 const Elf_Internal_Rela *relend,
1100 struct elf_link_hash_entry *h)
1101{
1102 unsigned int from_type = *r_type;
1103 unsigned int to_type = from_type;
1104 bfd_boolean check = TRUE;
1105
1106 switch (from_type)
13ae64f3
JJ		 1107 {
1108 case R_386_TLS_GD:
67a4f2b7
AO		 1109 case R_386_TLS_GOTDESC:
1110 case R_386_TLS_DESC_CALL:
13ae64f3 1111 case R_386_TLS_IE_32:
37e55690
JJ		 1112 case R_386_TLS_IE:
1113 case R_386_TLS_GOTIE:
142411ca
L		 1114 if (!info->shared)
1115 {
1116 if (h == NULL)
1117 to_type = R_386_TLS_LE_32;
1118 else if (from_type != R_386_TLS_IE
1119 && from_type != R_386_TLS_GOTIE)
1120 to_type = R_386_TLS_IE_32;
1121 }
1122
1123 /* When we are called from elf_i386_relocate_section, CONTENTS
1124 isn't NULL and there may be additional transitions based on
1125 TLS_TYPE. */
1126 if (contents != NULL)
1127 {
1128 unsigned int new_to_type = to_type;
1129
1130 if (!info->shared
1131 && h != NULL
1132 && h->dynindx == -1
1133 && (tls_type & GOT_TLS_IE))
1134 new_to_type = R_386_TLS_LE_32;
1135
1136 if (to_type == R_386_TLS_GD
1137 || to_type == R_386_TLS_GOTDESC
1138 || to_type == R_386_TLS_DESC_CALL)
1139 {
1140 if (tls_type == GOT_TLS_IE_POS)
1141 new_to_type = R_386_TLS_GOTIE;
1142 else if (tls_type & GOT_TLS_IE)
1143 new_to_type = R_386_TLS_IE_32;
1144 }
1145
1146 /* We checked the transition before when we were called from
1147 elf_i386_check_relocs. We only want to check the new
1148 transition which hasn't been checked before. */
1149 check = new_to_type != to_type && from_type == to_type;
1150 to_type = new_to_type;
1151 }
1152
1153 break;
1154
13ae64f3 1155 case R_386_TLS_LDM:
142411ca
L		 1156 if (!info->shared)
1157 to_type = R_386_TLS_LE_32;
1158 break;
1159
1160 default:
1161 return TRUE;
1162 }
1163
1164 /* Return TRUE if there is no transition. */
1165 if (from_type == to_type)
1166 return TRUE;
1167
1168 /* Check if the transition can be performed. */
1169 if (check
1170 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1171 symtab_hdr, sym_hashes,
1172 from_type, rel, relend))
1173 {
2f629d23 1174 reloc_howto_type *from, *to;
142411ca
L		 1175
1176 from = elf_i386_rtype_to_howto (abfd, from_type);
1177 to = elf_i386_rtype_to_howto (abfd, to_type);
1178
1179 (*_bfd_error_handler)
1180 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1181 "in section `%A' failed"),
1182 abfd, sec, from->name, to->name,
1183 h ? h->root.root.string : "a local symbol",
1184 (unsigned long) rel->r_offset);
1185 bfd_set_error (bfd_error_bad_value);
1186 return FALSE;
13ae64f3
JJ		 1187 }
1188
142411ca
L		 1189 *r_type = to_type;
1190 return TRUE;
13ae64f3
JJ		 1191}
1192
252b5132 1193/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 1194 calculate needed space in the global offset table, procedure linkage
1195 table, and dynamic reloc sections. */
252b5132 1196
b34976b6 1197static bfd_boolean
55fd94b0
AM		 1198elf_i386_check_relocs (bfd *abfd,
1199 struct bfd_link_info *info,
1200 asection *sec,
1201 const Elf_Internal_Rela *relocs)
252b5132 1202{
6725bdbf 1203 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1204 Elf_Internal_Shdr *symtab_hdr;
1205 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 1206 const Elf_Internal_Rela *rel;
1207 const Elf_Internal_Rela *rel_end;
252b5132
RH		 1208 asection *sreloc;
1209
1049f94e 1210 if (info->relocatable)
b34976b6 1211 return TRUE;
252b5132 1212
6725bdbf 1213 htab = elf_i386_hash_table (info);
252b5132
RH		 1214 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1215 sym_hashes = elf_sym_hashes (abfd);
252b5132 1216
252b5132
RH		 1217 sreloc = NULL;
1218
1219 rel_end = relocs + sec->reloc_count;
1220 for (rel = relocs; rel < rel_end; rel++)
1221 {
13ae64f3 1222 unsigned int r_type;
252b5132
RH		 1223 unsigned long r_symndx;
1224 struct elf_link_hash_entry *h;
1225
1226 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 1227 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 1228
d9bc7a44 1229 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 1230 {
d003868e
AM		 1231 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1232 abfd,
8f615d07 1233 r_symndx);
b34976b6 1234 return FALSE;
f5f31454
L		 1235 }
1236
252b5132
RH		 1237 if (r_symndx < symtab_hdr->sh_info)
1238 h = NULL;
1239 else
71cb9464
L		 1240 {
1241 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1242 while (h->root.type == bfd_link_hash_indirect
1243 || h->root.type == bfd_link_hash_warning)
1244 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1245 }
252b5132 1246
142411ca
L		 1247 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1248 symtab_hdr, sym_hashes,
1249 &r_type, GOT_UNKNOWN,
1250 rel, rel_end, h))
1251 return FALSE;
13ae64f3
JJ		 1252
1253 switch (r_type)
252b5132 1254 {
37e55690
JJ		 1255 case R_386_TLS_LDM:
1256 htab->tls_ldm_got.refcount += 1;
1257 goto create_got;
1258
1259 case R_386_PLT32:
1260 /* This symbol requires a procedure linkage table entry. We
1261 actually build the entry in adjust_dynamic_symbol,
1262 because this might be a case of linking PIC code which is
1263 never referenced by a dynamic object, in which case we
1264 don't need to generate a procedure linkage table entry
1265 after all. */
1266
1267 /* If this is a local symbol, we resolve it directly without
1268 creating a procedure linkage table entry. */
1269 if (h == NULL)
1270 continue;
1271
f5385ebf 1272 h->needs_plt = 1;
37e55690
JJ		 1273 h->plt.refcount += 1;
1274 break;
1275
13ae64f3 1276 case R_386_TLS_IE_32:
37e55690
JJ		 1277 case R_386_TLS_IE:
1278 case R_386_TLS_GOTIE:
13ae64f3
JJ		 1279 if (info->shared)
1280 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 1281 /* Fall through */
1282
252b5132 1283 case R_386_GOT32:
13ae64f3 1284 case R_386_TLS_GD:
67a4f2b7
AO		 1285 case R_386_TLS_GOTDESC:
1286 case R_386_TLS_DESC_CALL:
252b5132 1287 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1288 {
1289 int tls_type, old_tls_type;
1290
1291 switch (r_type)
1292 {
1293 default:
1294 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1295 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1296 case R_386_TLS_GOTDESC:
1297 case R_386_TLS_DESC_CALL:
1298 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1299 case R_386_TLS_IE_32:
1300 if (ELF32_R_TYPE (rel->r_info) == r_type)
1301 tls_type = GOT_TLS_IE_NEG;
1302 else
ebcfb3c0
JJ		 1303 /* If this is a GD->IE transition, we may use either of
1304 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
37e55690
JJ		 1305 tls_type = GOT_TLS_IE;
1306 break;
1307 case R_386_TLS_IE:
1308 case R_386_TLS_GOTIE:
1309 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1310 }
1311
1312 if (h != NULL)
1313 {
1314 h->got.refcount += 1;
1315 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1316 }
1317 else
1318 {
1319 bfd_signed_vma *local_got_refcounts;
1320
1321 /* This is a global offset table entry for a local symbol. */
1322 local_got_refcounts = elf_local_got_refcounts (abfd);
1323 if (local_got_refcounts == NULL)
1324 {
1325 bfd_size_type size;
1326
1327 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1328 size *= (sizeof (bfd_signed_vma)
1329 + sizeof (bfd_vma) + sizeof(char));
55fd94b0 1330 local_got_refcounts = bfd_zalloc (abfd, size);
13ae64f3 1331 if (local_got_refcounts == NULL)
b34976b6 1332 return FALSE;
13ae64f3 1333 elf_local_got_refcounts (abfd) = local_got_refcounts;
67a4f2b7
AO		 1334 elf_i386_local_tlsdesc_gotent (abfd)
1335 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
13ae64f3 1336 elf_i386_local_got_tls_type (abfd)
67a4f2b7 1337 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3
JJ		 1338 }
1339 local_got_refcounts[r_symndx] += 1;
1340 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1341 }
1342
37e55690
JJ		 1343 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1344 tls_type |= old_tls_type;
13ae64f3
JJ		 1345 /* If a TLS symbol is accessed using IE at least once,
1346 there is no point to use dynamic model for it. */
ebcfb3c0 1347 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7 1348 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1349 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1350 {
67a4f2b7 1351 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1352 tls_type = old_tls_type;
67a4f2b7
AO		 1353 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1354 && GOT_TLS_GD_ANY_P (tls_type))
1355 tls_type |= old_tls_type;
13ae64f3
JJ		 1356 else
1357 {
1358 (*_bfd_error_handler)
d003868e 1359 (_("%B: `%s' accessed both as normal and "
55fd94b0 1360 "thread local symbol"),
d003868e 1361 abfd,
37e55690 1362 h ? h->root.root.string : "<local>");
b34976b6 1363 return FALSE;
13ae64f3
JJ		 1364 }
1365 }
1366
1367 if (old_tls_type != tls_type)
1368 {
1369 if (h != NULL)
1370 elf_i386_hash_entry (h)->tls_type = tls_type;
1371 else
1372 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1373 }
1374 }
0ac8d2ca
AM		 1375 /* Fall through */
1376
1377 case R_386_GOTOFF:
1378 case R_386_GOTPC:
13ae64f3 1379 create_got:
0ac8d2ca
AM		 1380 if (htab->sgot == NULL)
1381 {
1382 if (htab->elf.dynobj == NULL)
1383 htab->elf.dynobj = abfd;
1384 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 1385 return FALSE;
0ac8d2ca 1386 }
37e55690
JJ		 1387 if (r_type != R_386_TLS_IE)
1388 break;
1389 /* Fall through */
252b5132 1390
37e55690
JJ		 1391 case R_386_TLS_LE_32:
1392 case R_386_TLS_LE:
1393 if (!info->shared)
1394 break;
bffbf940 1395 info->flags |= DF_STATIC_TLS;
b34976b6 1396 /* Fall through */
252b5132
RH		 1397
1398 case R_386_32:
1399 case R_386_PC32:
12d0ee4a 1400 if (h != NULL && !info->shared)
6725bdbf 1401 {
12d0ee4a 1402 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1403 need a copy reloc. We can't check reliably at this
1404 stage whether the section is read-only, as input
1405 sections have not yet been mapped to output sections.
1406 Tentatively set the flag for now, and correct in
1407 adjust_dynamic_symbol. */
f5385ebf 1408 h->non_got_ref = 1;
12d0ee4a
AM		 1409
1410 /* We may need a .plt entry if the function this reloc
1411 refers to is in a shared lib. */
51b64d56 1412 h->plt.refcount += 1;
c6585bbb 1413 if (r_type != R_386_PC32)
f5385ebf 1414 h->pointer_equality_needed = 1;
6725bdbf 1415 }
7843f00e 1416
252b5132 1417 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1418 against a global symbol, or a non PC relative reloc
1419 against a local symbol, then we need to copy the reloc
1420 into the shared library. However, if we are linking with
1421 -Bsymbolic, we do not need to copy a reloc against a
1422 global symbol which is defined in an object we are
1423 including in the link (i.e., DEF_REGULAR is set). At
1424 this point we have not seen all the input files, so it is
1425 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1426 later (it is never cleared). In case of a weak definition,
1427 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1428 a shared library. We account for that possibility below by
1f655a09
L		 1429 storing information in the relocs_copied field of the hash
1430 table entry. A similar situation occurs when creating
1431 shared libraries and symbol visibility changes render the
12d0ee4a 1432 symbol local.
56882138 1433
12d0ee4a
AM		 1434 If on the other hand, we are creating an executable, we
1435 may need to keep relocations for symbols satisfied by a
1436 dynamic library if we manage to avoid copy relocs for the
1437 symbol. */
1438 if ((info->shared
1439 && (sec->flags & SEC_ALLOC) != 0
13ae64f3 1440 && (r_type != R_386_PC32
12d0ee4a 1441 || (h != NULL
55255dae 1442 && (! SYMBOLIC_BIND (info, h)
12d0ee4a 1443 || h->root.type == bfd_link_hash_defweak
f5385ebf 1444 || !h->def_regular))))
a23b6845
AM		 1445 || (ELIMINATE_COPY_RELOCS
1446 && !info->shared
12d0ee4a
AM		 1447 && (sec->flags & SEC_ALLOC) != 0
1448 && h != NULL
12d0ee4a 1449 && (h->root.type == bfd_link_hash_defweak
f5385ebf 1450 || !h->def_regular)))
252b5132 1451 {
ec338859
AM		 1452 struct elf_i386_dyn_relocs *p;
1453 struct elf_i386_dyn_relocs **head;
1454
12d0ee4a
AM		 1455 /* We must copy these reloc types into the output file.
1456 Create a reloc section in dynobj and make room for
1457 this reloc. */
252b5132
RH		 1458 if (sreloc == NULL)
1459 {
1460 const char *name;
0ac8d2ca 1461 bfd *dynobj;
e92d460e
AM		 1462 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1463 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
252b5132 1464
e92d460e 1465 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
252b5132 1466 if (name == NULL)
b34976b6 1467 return FALSE;
252b5132 1468
0112cd26 1469 if (! CONST_STRNEQ (name, ".rel")
c8492176
L		 1470 || strcmp (bfd_get_section_name (abfd, sec),
1471 name + 4) != 0)
1472 {
0c715baa 1473 (*_bfd_error_handler)
d003868e
AM		 1474 (_("%B: bad relocation section name `%s\'"),
1475 abfd, name);
f5f31454 1476 }
252b5132 1477
0ac8d2ca
AM		 1478 if (htab->elf.dynobj == NULL)
1479 htab->elf.dynobj = abfd;
1480
1481 dynobj = htab->elf.dynobj;
252b5132
RH		 1482 sreloc = bfd_get_section_by_name (dynobj, name);
1483 if (sreloc == NULL)
1484 {
1485 flagword flags;
1486
252b5132
RH		 1487 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1488 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1489 if ((sec->flags & SEC_ALLOC) != 0)
1490 flags |= SEC_ALLOC | SEC_LOAD;
3496cb2a
L		 1491 sreloc = bfd_make_section_with_flags (dynobj,
1492 name,
1493 flags);
252b5132 1494 if (sreloc == NULL
252b5132 1495 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
b34976b6 1496 return FALSE;
252b5132 1497 }
0c715baa 1498 elf_section_data (sec)->sreloc = sreloc;
252b5132
RH		 1499 }
1500
0c715baa
AM		 1501 /* If this is a global symbol, we count the number of
1502 relocations we need for this symbol. */
1503 if (h != NULL)
252b5132 1504 {
ec338859 1505 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
0c715baa
AM		 1506 }
1507 else
1508 {
e81d3500 1509 void **vpp;
ec338859
AM		 1510 /* Track dynamic relocs needed for local syms too.
1511 We really need local syms available to do this
1512 easily. Oh well. */
1513
1514 asection *s;
1515 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1516 sec, r_symndx);
1517 if (s == NULL)
b34976b6 1518 return FALSE;
ec338859 1519
e81d3500
DD		 1520 vpp = &elf_section_data (s)->local_dynrel;
1521 head = (struct elf_i386_dyn_relocs **)vpp;
ec338859
AM		 1522 }
1523
1524 p = *head;
1525 if (p == NULL || p->sec != sec)
1526 {
1527 bfd_size_type amt = sizeof *p;
55fd94b0 1528 p = bfd_alloc (htab->elf.dynobj, amt);
ec338859 1529 if (p == NULL)
b34976b6 1530 return FALSE;
ec338859
AM		 1531 p->next = *head;
1532 *head = p;
1533 p->sec = sec;
1534 p->count = 0;
1535 p->pc_count = 0;
252b5132 1536 }
ec338859
AM		 1537
1538 p->count += 1;
13ae64f3 1539 if (r_type == R_386_PC32)
ec338859 1540 p->pc_count += 1;
252b5132 1541 }
252b5132
RH		 1542 break;
1543
1544 /* This relocation describes the C++ object vtable hierarchy.
1545 Reconstruct it for later use during GC. */
1546 case R_386_GNU_VTINHERIT:
d17e0c6e 1547 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 1548 return FALSE;
252b5132
RH		 1549 break;
1550
1551 /* This relocation describes which C++ vtable entries are actually
1552 used. Record for later use during GC. */
1553 case R_386_GNU_VTENTRY:
c6aa130f
MS		 1554 BFD_ASSERT (h != NULL);
1555 if (h != NULL
1556 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6 1557 return FALSE;
252b5132
RH		 1558 break;
1559
1560 default:
1561 break;
1562 }
1563 }
1564
b34976b6 1565 return TRUE;
252b5132
RH		 1566}
1567
1568/* Return the section that should be marked against GC for a given
1569 relocation. */
1570
1571static asection *
55fd94b0 1572elf_i386_gc_mark_hook (asection *sec,
07adf181 1573 struct bfd_link_info *info,
55fd94b0
AM		 1574 Elf_Internal_Rela *rel,
1575 struct elf_link_hash_entry *h,
1576 Elf_Internal_Sym *sym)
252b5132
RH		 1577{
1578 if (h != NULL)
07adf181
AM		 1579 switch (ELF32_R_TYPE (rel->r_info))
1580 {
1581 case R_386_GNU_VTINHERIT:
1582 case R_386_GNU_VTENTRY:
1583 return NULL;
1584 }
1585
1586 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132
RH		 1587}
1588
1589/* Update the got entry reference counts for the section being removed. */
1590
b34976b6 1591static bfd_boolean
55fd94b0
AM		 1592elf_i386_gc_sweep_hook (bfd *abfd,
1593 struct bfd_link_info *info,
1594 asection *sec,
1595 const Elf_Internal_Rela *relocs)
252b5132 1596{
dd5724d5
AM		 1597 Elf_Internal_Shdr *symtab_hdr;
1598 struct elf_link_hash_entry **sym_hashes;
1599 bfd_signed_vma *local_got_refcounts;
1600 const Elf_Internal_Rela *rel, *relend;
dd5724d5 1601
ec338859 1602 elf_section_data (sec)->local_dynrel = NULL;
dd5724d5 1603
6725bdbf
AM		 1604 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1605 sym_hashes = elf_sym_hashes (abfd);
1606 local_got_refcounts = elf_local_got_refcounts (abfd);
dd5724d5
AM		 1607
1608 relend = relocs + sec->reloc_count;
1609 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 1610 {
1611 unsigned long r_symndx;
1612 unsigned int r_type;
1613 struct elf_link_hash_entry *h = NULL;
37e55690 1614
26e41594
AM		 1615 r_symndx = ELF32_R_SYM (rel->r_info);
1616 if (r_symndx >= symtab_hdr->sh_info)
1617 {
1618 struct elf_i386_link_hash_entry *eh;
1619 struct elf_i386_dyn_relocs **pp;
1620 struct elf_i386_dyn_relocs *p;
dd5724d5 1621
26e41594 1622 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 1623 while (h->root.type == bfd_link_hash_indirect
1624 || h->root.type == bfd_link_hash_warning)
1625 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 1626 eh = (struct elf_i386_link_hash_entry *) h;
0c715baa 1627
26e41594
AM		 1628 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1629 if (p->sec == sec)
1630 {
1631 /* Everything must go for SEC. */
1632 *pp = p->next;
1633 break;
1634 }
1635 }
0c715baa 1636
26e41594 1637 r_type = ELF32_R_TYPE (rel->r_info);
142411ca
L		 1638 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1639 symtab_hdr, sym_hashes,
1640 &r_type, GOT_UNKNOWN,
1641 rel, relend, h))
1642 return FALSE;
1643
26e41594
AM		 1644 switch (r_type)
1645 {
1646 case R_386_TLS_LDM:
1647 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1648 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1649 break;
0c715baa 1650
26e41594 1651 case R_386_TLS_GD:
67a4f2b7
AO		 1652 case R_386_TLS_GOTDESC:
1653 case R_386_TLS_DESC_CALL:
26e41594
AM		 1654 case R_386_TLS_IE_32:
1655 case R_386_TLS_IE:
1656 case R_386_TLS_GOTIE:
1657 case R_386_GOT32:
1658 if (h != NULL)
1659 {
1660 if (h->got.refcount > 0)
1661 h->got.refcount -= 1;
1662 }
1663 else if (local_got_refcounts != NULL)
1664 {
1665 if (local_got_refcounts[r_symndx] > 0)
1666 local_got_refcounts[r_symndx] -= 1;
1667 }
1668 break;
0c715baa 1669
26e41594
AM		 1670 case R_386_32:
1671 case R_386_PC32:
1672 if (info->shared)
1673 break;
1674 /* Fall through */
6725bdbf 1675
26e41594
AM		 1676 case R_386_PLT32:
1677 if (h != NULL)
1678 {
1679 if (h->plt.refcount > 0)
1680 h->plt.refcount -= 1;
1681 }
1682 break;
dd5724d5 1683
26e41594
AM		 1684 default:
1685 break;
1686 }
1687 }
252b5132 1688
b34976b6 1689 return TRUE;
252b5132
RH		 1690}
1691
1692/* Adjust a symbol defined by a dynamic object and referenced by a
1693 regular object. The current definition is in some section of the
1694 dynamic object, but we're not including those sections. We have to
1695 change the definition to something the rest of the link can
1696 understand. */
1697
b34976b6 1698static bfd_boolean
55fd94b0
AM		 1699elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1700 struct elf_link_hash_entry *h)
252b5132 1701{
6725bdbf 1702 struct elf_i386_link_hash_table *htab;
252b5132 1703 asection *s;
252b5132 1704
252b5132
RH		 1705 /* If this is a function, put it in the procedure linkage table. We
1706 will fill in the contents of the procedure linkage table later,
1707 when we know the address of the .got section. */
1708 if (h->type == STT_FUNC
f5385ebf 1709 || h->needs_plt)
252b5132 1710 {
6725bdbf 1711 if (h->plt.refcount <= 0
9c7a29a3
AM		 1712 || SYMBOL_CALLS_LOCAL (info, h)
1713 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1714 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 1715 {
1716 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM		 1717 file, but the symbol was never referred to by a dynamic
1718 object, or if all references were garbage collected. In
1719 such a case, we don't actually need to build a procedure
1720 linkage table, and we can just do a PC32 reloc instead. */
bbd7ec4a 1721 h->plt.offset = (bfd_vma) -1;
f5385ebf 1722 h->needs_plt = 0;
252b5132
RH		 1723 }
1724
b34976b6 1725 return TRUE;
252b5132 1726 }
6725bdbf
AM		 1727 else
1728 /* It's possible that we incorrectly decided a .plt reloc was
1729 needed for an R_386_PC32 reloc to a non-function sym in
1730 check_relocs. We can't decide accurately between function and
1731 non-function syms in check-relocs; Objects loaded later in
1732 the link may change h->type. So fix it now. */
bbd7ec4a 1733 h->plt.offset = (bfd_vma) -1;
252b5132
RH		 1734
1735 /* If this is a weak symbol, and there is a real definition, the
1736 processor independent code will have arranged for us to see the
1737 real definition first, and we can just use the same value. */
f6e332e6 1738 if (h->u.weakdef != NULL)
252b5132 1739 {
f6e332e6
AM		 1740 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1741 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1742 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1743 h->root.u.def.value = h->u.weakdef->root.u.def.value;
a23b6845 1744 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 1745 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 1746 return TRUE;
252b5132
RH		 1747 }
1748
1749 /* This is a reference to a symbol defined by a dynamic object which
1750 is not a function. */
1751
1752 /* If we are creating a shared library, we must presume that the
1753 only references to the symbol are via the global offset table.
1754 For such cases we need not do anything here; the relocations will
1755 be handled correctly by relocate_section. */
1756 if (info->shared)
b34976b6 1757 return TRUE;
252b5132 1758
7843f00e
ILT		 1759 /* If there are no references to this symbol that do not use the
1760 GOT, we don't need to generate a copy reloc. */
f5385ebf 1761 if (!h->non_got_ref)
b34976b6 1762 return TRUE;
7843f00e 1763
8bd621d8
AM		 1764 /* If -z nocopyreloc was given, we won't generate them either. */
1765 if (info->nocopyreloc)
1766 {
f5385ebf 1767 h->non_got_ref = 0;
b34976b6 1768 return TRUE;
8bd621d8
AM		 1769 }
1770
643796e3
DJ		 1771 htab = elf_i386_hash_table (info);
1772
1773 /* If there aren't any dynamic relocs in read-only sections, then
1774 we can keep the dynamic relocs and avoid the copy reloc. This
1775 doesn't work on VxWorks, where we can not have dynamic relocations
1776 (other than copy and jump slot relocations) in an executable. */
1777 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
ebe50bae 1778 {
a23b6845
AM		 1779 struct elf_i386_link_hash_entry * eh;
1780 struct elf_i386_dyn_relocs *p;
ebe50bae 1781
a23b6845
AM		 1782 eh = (struct elf_i386_link_hash_entry *) h;
1783 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1784 {
1785 s = p->sec->output_section;
1786 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1787 break;
1788 }
1789
a23b6845
AM		 1790 if (p == NULL)
1791 {
f5385ebf 1792 h->non_got_ref = 0;
a23b6845
AM		 1793 return TRUE;
1794 }
ebe50bae
AM		 1795 }
1796
909272ee
AM		 1797 if (h->size == 0)
1798 {
1799 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1800 h->root.root.string);
1801 return TRUE;
1802 }
1803
252b5132
RH		 1804 /* We must allocate the symbol in our .dynbss section, which will
1805 become part of the .bss section of the executable. There will be
1806 an entry for this symbol in the .dynsym section. The dynamic
1807 object will contain position independent code, so all references
1808 from the dynamic object to this symbol will go through the global
1809 offset table. The dynamic linker will use the .dynsym entry to
1810 determine the address it must put in the global offset table, so
1811 both the dynamic object and the regular object will refer to the
1812 same memory location for the variable. */
1813
252b5132
RH		 1814 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1815 copy the initial value out of the dynamic object and into the
0ac8d2ca 1816 runtime process image. */
252b5132
RH		 1817 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1818 {
eea6121a 1819 htab->srelbss->size += sizeof (Elf32_External_Rel);
f5385ebf 1820 h->needs_copy = 1;
252b5132
RH		 1821 }
1822
0ac8d2ca 1823 s = htab->sdynbss;
252b5132 1824
027297b7 1825 return _bfd_elf_adjust_dynamic_copy (h, s);
252b5132
RH		 1826}
1827
6725bdbf 1828/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 1829 dynamic relocs. */
6725bdbf 1830
b34976b6 1831static bfd_boolean
55fd94b0 1832allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 1833{
1834 struct bfd_link_info *info;
1835 struct elf_i386_link_hash_table *htab;
5a15f56f 1836 struct elf_i386_link_hash_entry *eh;
0c715baa 1837 struct elf_i386_dyn_relocs *p;
6725bdbf 1838
e92d460e 1839 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1840 return TRUE;
6725bdbf 1841
e92d460e
AM		 1842 if (h->root.type == bfd_link_hash_warning)
1843 /* When warning symbols are created, they **replace** the "real"
1844 entry in the hash table, thus we never get to see the real
1845 symbol in a hash traversal. So look at it now. */
1846 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1847
6725bdbf
AM		 1848 info = (struct bfd_link_info *) inf;
1849 htab = elf_i386_hash_table (info);
1850
ebe50bae 1851 if (htab->elf.dynamic_sections_created
9c7a29a3 1852 && h->plt.refcount > 0)
6725bdbf 1853 {
5a15f56f
AM		 1854 /* Make sure this symbol is output as a dynamic symbol.
1855 Undefined weak syms won't yet be marked as dynamic. */
1856 if (h->dynindx == -1
f5385ebf 1857 && !h->forced_local)
5a15f56f 1858 {
c152c796 1859 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1860 return FALSE;
5a15f56f
AM		 1861 }
1862
4e795f50
AM		 1863 if (info->shared
1864 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 1865 {
0ac8d2ca 1866 asection *s = htab->splt;
6725bdbf 1867
ced53ee5
AM		 1868 /* If this is the first .plt entry, make room for the special
1869 first entry. */
eea6121a
AM		 1870 if (s->size == 0)
1871 s->size += PLT_ENTRY_SIZE;
6725bdbf 1872
eea6121a 1873 h->plt.offset = s->size;
6725bdbf 1874
ced53ee5
AM		 1875 /* If this symbol is not defined in a regular file, and we are
1876 not generating a shared library, then set the symbol to this
1877 location in the .plt. This is required to make function
1878 pointers compare as equal between the normal executable and
1879 the shared library. */
1880 if (! info->shared
f5385ebf 1881 && !h->def_regular)
ced53ee5
AM		 1882 {
1883 h->root.u.def.section = s;
1884 h->root.u.def.value = h->plt.offset;
1885 }
6725bdbf 1886
ced53ee5 1887 /* Make room for this entry. */
eea6121a 1888 s->size += PLT_ENTRY_SIZE;
6725bdbf 1889
ced53ee5
AM		 1890 /* We also need to make an entry in the .got.plt section, which
1891 will be placed in the .got section by the linker script. */
eea6121a 1892 htab->sgotplt->size += 4;
6725bdbf 1893
6725bdbf 1894 /* We also need to make an entry in the .rel.plt section. */
eea6121a 1895 htab->srelplt->size += sizeof (Elf32_External_Rel);
5ae0bfb6 1896 htab->next_tls_desc_index++;
eac338cf
PB		 1897
1898 if (htab->is_vxworks && !info->shared)
1899 {
1900 /* VxWorks has a second set of relocations for each PLT entry
1901 in executables. They go in a separate relocation section,
1902 which is processed by the kernel loader. */
1903
1904 /* There are two relocations for the initial PLT entry: an
1905 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1906 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1907
1908 if (h->plt.offset == PLT_ENTRY_SIZE)
1909 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1910
1911 /* There are two extra relocations for each subsequent PLT entry:
1912 an R_386_32 relocation for the GOT entry, and an R_386_32
1913 relocation for the PLT entry. */
1914
1915 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1916 }
6725bdbf 1917 }
ced53ee5
AM		 1918 else
1919 {
51b64d56 1920 h->plt.offset = (bfd_vma) -1;
f5385ebf 1921 h->needs_plt = 0;
ced53ee5 1922 }
6725bdbf
AM		 1923 }
1924 else
1925 {
51b64d56 1926 h->plt.offset = (bfd_vma) -1;
f5385ebf 1927 h->needs_plt = 0;
6725bdbf
AM		 1928 }
1929
67a4f2b7
AO		 1930 eh = (struct elf_i386_link_hash_entry *) h;
1931 eh->tlsdesc_got = (bfd_vma) -1;
1932
37e55690 1933 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 1934 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1935 if (h->got.refcount > 0
1936 && !info->shared
1937 && h->dynindx == -1
37e55690 1938 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
cedb70c5 1939 h->got.offset = (bfd_vma) -1;
13ae64f3 1940 else if (h->got.refcount > 0)
6725bdbf 1941 {
0ac8d2ca 1942 asection *s;
b34976b6 1943 bfd_boolean dyn;
13ae64f3 1944 int tls_type = elf_i386_hash_entry(h)->tls_type;
6725bdbf 1945
5a15f56f
AM		 1946 /* Make sure this symbol is output as a dynamic symbol.
1947 Undefined weak syms won't yet be marked as dynamic. */
1948 if (h->dynindx == -1
f5385ebf 1949 && !h->forced_local)
5a15f56f 1950 {
c152c796 1951 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1952 return FALSE;
5a15f56f
AM		 1953 }
1954
6725bdbf 1955 s = htab->sgot;
67a4f2b7
AO		 1956 if (GOT_TLS_GDESC_P (tls_type))
1957 {
1958 eh->tlsdesc_got = htab->sgotplt->size
1959 - elf_i386_compute_jump_table_size (htab);
1960 htab->sgotplt->size += 8;
1961 h->got.offset = (bfd_vma) -2;
1962 }
1963 if (! GOT_TLS_GDESC_P (tls_type)
1964 || GOT_TLS_GD_P (tls_type))
1965 {
1966 h->got.offset = s->size;
1967 s->size += 4;
1968 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1969 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
1970 s->size += 4;
1971 }
ebe50bae 1972 dyn = htab->elf.dynamic_sections_created;
13ae64f3 1973 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 1974 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1975 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1976 need two), R_386_TLS_GD needs one if local symbol and two if
1977 global. */
1978 if (tls_type == GOT_TLS_IE_BOTH)
eea6121a 1979 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 1980 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
37e55690 1981 || (tls_type & GOT_TLS_IE))
eea6121a 1982 htab->srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 1983 else if (GOT_TLS_GD_P (tls_type))
eea6121a 1984 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 1985 else if (! GOT_TLS_GDESC_P (tls_type)
1986 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1987 || h->root.type != bfd_link_hash_undefweak)
ef5aade5
L		 1988 && (info->shared
1989 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
eea6121a 1990 htab->srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7
AO		 1991 if (GOT_TLS_GDESC_P (tls_type))
1992 htab->srelplt->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 1993 }
1994 else
51b64d56 1995 h->got.offset = (bfd_vma) -1;
6725bdbf 1996
5a15f56f 1997 if (eh->dyn_relocs == NULL)
b34976b6 1998 return TRUE;
5a15f56f 1999
0c715baa
AM		 2000 /* In the shared -Bsymbolic case, discard space allocated for
2001 dynamic pc-relative relocs against symbols which turn out to be
2002 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 2003 space for pc-relative relocs that have become local due to symbol
2004 visibility changes. */
0c715baa
AM		 2005
2006 if (info->shared)
5a15f56f 2007 {
09695f56
AM		 2008 /* The only reloc that uses pc_count is R_386_PC32, which will
2009 appear on a call or on something like ".long foo - .". We
2010 want calls to protected symbols to resolve directly to the
2011 function rather than going via the plt. If people want
2012 function pointer comparisons to work as expected then they
2013 should avoid writing assembly like ".long foo - .". */
2014 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 2015 {
0c715baa
AM		 2016 struct elf_i386_dyn_relocs **pp;
2017
2018 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2019 {
2020 p->count -= p->pc_count;
2021 p->pc_count = 0;
2022 if (p->count == 0)
2023 *pp = p->next;
2024 else
2025 pp = &p->next;
2026 }
5a15f56f 2027 }
4e795f50
AM		 2028
2029 /* Also discard relocs on undefined weak syms with non-default
2030 visibility. */
22d606e9 2031 if (eh->dyn_relocs != NULL
4e795f50 2032 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM		 2033 {
2034 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2035 eh->dyn_relocs = NULL;
2036
2037 /* Make sure undefined weak symbols are output as a dynamic
2038 symbol in PIEs. */
2039 else if (h->dynindx == -1
2040 && !h->forced_local)
2041 {
2042 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2043 return FALSE;
2044 }
2045 }
0c715baa 2046 }
a23b6845 2047 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 2048 {
2049 /* For the non-shared case, discard space for relocs against
2050 symbols which turn out to need copy relocs or are not
2051 dynamic. */
2052
f5385ebf
AM		 2053 if (!h->non_got_ref
2054 && ((h->def_dynamic
2055 && !h->def_regular)
ebe50bae 2056 || (htab->elf.dynamic_sections_created
0c715baa
AM		 2057 && (h->root.type == bfd_link_hash_undefweak
2058 || h->root.type == bfd_link_hash_undefined))))
2059 {
2060 /* Make sure this symbol is output as a dynamic symbol.
2061 Undefined weak syms won't yet be marked as dynamic. */
2062 if (h->dynindx == -1
f5385ebf 2063 && !h->forced_local)
0c715baa 2064 {
c152c796 2065 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2066 return FALSE;
0c715baa 2067 }
5a15f56f 2068
0c715baa
AM		 2069 /* If that succeeded, we know we'll be keeping all the
2070 relocs. */
2071 if (h->dynindx != -1)
2072 goto keep;
2073 }
2074
2075 eh->dyn_relocs = NULL;
2076
ec338859 2077 keep: ;
5a15f56f
AM		 2078 }
2079
0c715baa
AM		 2080 /* Finally, allocate space. */
2081 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 2082 {
0c715baa 2083 asection *sreloc = elf_section_data (p->sec)->sreloc;
eea6121a 2084 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 2085 }
2086
b34976b6 2087 return TRUE;
6725bdbf
AM		 2088}
2089
0c715baa
AM		 2090/* Find any dynamic relocs that apply to read-only sections. */
2091
b34976b6 2092static bfd_boolean
55fd94b0 2093readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
0c715baa
AM		 2094{
2095 struct elf_i386_link_hash_entry *eh;
2096 struct elf_i386_dyn_relocs *p;
2097
e92d460e
AM		 2098 if (h->root.type == bfd_link_hash_warning)
2099 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2100
0c715baa
AM		 2101 eh = (struct elf_i386_link_hash_entry *) h;
2102 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2103 {
2104 asection *s = p->sec->output_section;
2105
2106 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2107 {
2108 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2109
2110 info->flags |= DF_TEXTREL;
2111
2112 /* Not an error, just cut short the traversal. */
b34976b6 2113 return FALSE;
0c715baa
AM		 2114 }
2115 }
b34976b6 2116 return TRUE;
0c715baa
AM		 2117}
2118
252b5132
RH		 2119/* Set the sizes of the dynamic sections. */
2120
b34976b6 2121static bfd_boolean
55fd94b0
AM		 2122elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2123 struct bfd_link_info *info)
252b5132 2124{
6725bdbf 2125 struct elf_i386_link_hash_table *htab;
252b5132
RH		 2126 bfd *dynobj;
2127 asection *s;
b34976b6 2128 bfd_boolean relocs;
0c715baa 2129 bfd *ibfd;
252b5132 2130
6725bdbf 2131 htab = elf_i386_hash_table (info);
ebe50bae 2132 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 2133 if (dynobj == NULL)
2134 abort ();
252b5132 2135
ebe50bae 2136 if (htab->elf.dynamic_sections_created)
252b5132
RH		 2137 {
2138 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 2139 if (info->executable)
252b5132
RH		 2140 {
2141 s = bfd_get_section_by_name (dynobj, ".interp");
ffb2e45b
AM		 2142 if (s == NULL)
2143 abort ();
eea6121a 2144 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132
RH		 2145 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2146 }
161d71a6 2147 }
6725bdbf 2148
0c715baa
AM		 2149 /* Set up .got offsets for local syms, and space for local dynamic
2150 relocs. */
2151 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
161d71a6
L		 2152 {
2153 bfd_signed_vma *local_got;
2154 bfd_signed_vma *end_local_got;
13ae64f3 2155 char *local_tls_type;
67a4f2b7 2156 bfd_vma *local_tlsdesc_gotent;
161d71a6
L		 2157 bfd_size_type locsymcount;
2158 Elf_Internal_Shdr *symtab_hdr;
2159 asection *srel;
6725bdbf 2160
0c715baa 2161 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
161d71a6 2162 continue;
6725bdbf 2163
0c715baa
AM		 2164 for (s = ibfd->sections; s != NULL; s = s->next)
2165 {
ec338859 2166 struct elf_i386_dyn_relocs *p;
0c715baa 2167
e81d3500
DD		 2168 for (p = ((struct elf_i386_dyn_relocs *)
2169 elf_section_data (s)->local_dynrel);
ec338859
AM		 2170 p != NULL;
2171 p = p->next)
0c715baa 2172 {
ec338859
AM		 2173 if (!bfd_is_abs_section (p->sec)
2174 && bfd_is_abs_section (p->sec->output_section))
2175 {
2176 /* Input section has been discarded, either because
2177 it is a copy of a linkonce section or due to
2178 linker script /DISCARD/, so we'll be discarding
2179 the relocs too. */
2180 }
248866a8 2181 else if (p->count != 0)
ec338859
AM		 2182 {
2183 srel = elf_section_data (p->sec)->sreloc;
eea6121a 2184 srel->size += p->count * sizeof (Elf32_External_Rel);
248866a8
AM		 2185 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2186 info->flags |= DF_TEXTREL;
ec338859 2187 }
0c715baa
AM		 2188 }
2189 }
2190
2191 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 2192 if (!local_got)
2193 continue;
6725bdbf 2194
0c715baa 2195 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
161d71a6
L		 2196 locsymcount = symtab_hdr->sh_info;
2197 end_local_got = local_got + locsymcount;
13ae64f3 2198 local_tls_type = elf_i386_local_got_tls_type (ibfd);
67a4f2b7 2199 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
161d71a6
L		 2200 s = htab->sgot;
2201 srel = htab->srelgot;
67a4f2b7
AO		 2202 for (; local_got < end_local_got;
2203 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
161d71a6 2204 {
67a4f2b7 2205 *local_tlsdesc_gotent = (bfd_vma) -1;
161d71a6 2206 if (*local_got > 0)
6725bdbf 2207 {
67a4f2b7
AO		 2208 if (GOT_TLS_GDESC_P (*local_tls_type))
2209 {
2210 *local_tlsdesc_gotent = htab->sgotplt->size
2211 - elf_i386_compute_jump_table_size (htab);
2212 htab->sgotplt->size += 8;
2213 *local_got = (bfd_vma) -2;
2214 }
2215 if (! GOT_TLS_GDESC_P (*local_tls_type)
2216 || GOT_TLS_GD_P (*local_tls_type))
2217 {
2218 *local_got = s->size;
2219 s->size += 4;
2220 if (GOT_TLS_GD_P (*local_tls_type)
2221 || *local_tls_type == GOT_TLS_IE_BOTH)
2222 s->size += 4;
2223 }
13ae64f3 2224 if (info->shared
67a4f2b7 2225 || GOT_TLS_GD_ANY_P (*local_tls_type)
37e55690
JJ		 2226 || (*local_tls_type & GOT_TLS_IE))
2227 {
2228 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 2229 srel->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 2230 else if (GOT_TLS_GD_P (*local_tls_type)
2231 || ! GOT_TLS_GDESC_P (*local_tls_type))
eea6121a 2232 srel->size += sizeof (Elf32_External_Rel);
67a4f2b7
AO		 2233 if (GOT_TLS_GDESC_P (*local_tls_type))
2234 htab->srelplt->size += sizeof (Elf32_External_Rel);
37e55690 2235 }
6725bdbf 2236 }
161d71a6
L		 2237 else
2238 *local_got = (bfd_vma) -1;
6725bdbf 2239 }
252b5132 2240 }
6725bdbf 2241
13ae64f3
JJ		 2242 if (htab->tls_ldm_got.refcount > 0)
2243 {
2244 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2245 relocs. */
eea6121a
AM		 2246 htab->tls_ldm_got.offset = htab->sgot->size;
2247 htab->sgot->size += 8;
2248 htab->srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 2249 }
2250 else
2251 htab->tls_ldm_got.offset = -1;
2252
0c715baa
AM		 2253 /* Allocate global sym .plt and .got entries, and space for global
2254 sym dynamic relocs. */
ebe50bae 2255 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
252b5132 2256
67a4f2b7
AO		 2257 /* For every jump slot reserved in the sgotplt, reloc_count is
2258 incremented. However, when we reserve space for TLS descriptors,
2259 it's not incremented, so in order to compute the space reserved
2260 for them, it suffices to multiply the reloc count by the jump
2261 slot size. */
2262 if (htab->srelplt)
5ae0bfb6 2263 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
67a4f2b7 2264
5a15f56f
AM		 2265 /* We now have determined the sizes of the various dynamic sections.
2266 Allocate memory for them. */
b34976b6 2267 relocs = FALSE;
252b5132
RH		 2268 for (s = dynobj->sections; s != NULL; s = s->next)
2269 {
eac338cf
PB		 2270 bfd_boolean strip_section = TRUE;
2271
252b5132
RH		 2272 if ((s->flags & SEC_LINKER_CREATED) == 0)
2273 continue;
2274
6725bdbf
AM		 2275 if (s == htab->splt
2276 || s == htab->sgot
75ff4589
L		 2277 || s == htab->sgotplt
2278 || s == htab->sdynbss)
252b5132 2279 {
6725bdbf
AM		 2280 /* Strip this section if we don't need it; see the
2281 comment below. */
eac338cf
PB		 2282 /* We'd like to strip these sections if they aren't needed, but if
2283 we've exported dynamic symbols from them we must leave them.
2284 It's too late to tell BFD to get rid of the symbols. */
2285
7325306f 2286 if (htab->elf.hplt != NULL)
eac338cf 2287 strip_section = FALSE;
252b5132 2288 }
0112cd26 2289 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
252b5132 2290 {
eac338cf 2291 if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2)
b34976b6 2292 relocs = TRUE;
252b5132 2293
0ac8d2ca
AM		 2294 /* We use the reloc_count field as a counter if we need
2295 to copy relocs into the output file. */
5ae0bfb6 2296 s->reloc_count = 0;
252b5132 2297 }
6725bdbf 2298 else
252b5132
RH		 2299 {
2300 /* It's not one of our sections, so don't allocate space. */
2301 continue;
2302 }
2303
c456f082 2304 if (s->size == 0)
252b5132 2305 {
0ac8d2ca
AM		 2306 /* If we don't need this section, strip it from the
2307 output file. This is mostly to handle .rel.bss and
2308 .rel.plt. We must create both sections in
2309 create_dynamic_sections, because they must be created
2310 before the linker maps input sections to output
2311 sections. The linker does that before
2312 adjust_dynamic_symbol is called, and it is that
2313 function which decides whether anything needs to go
2314 into these sections. */
c456f082
AM		 2315 if (strip_section)
2316 s->flags |= SEC_EXCLUDE;
252b5132
RH		 2317 continue;
2318 }
2319
c456f082
AM		 2320 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2321 continue;
2322
f69da49f
AM		 2323 /* Allocate memory for the section contents. We use bfd_zalloc
2324 here in case unused entries are not reclaimed before the
2325 section's contents are written out. This should not happen,
2326 but this way if it does, we get a R_386_NONE reloc instead
2327 of garbage. */
eea6121a 2328 s->contents = bfd_zalloc (dynobj, s->size);
6725bdbf 2329 if (s->contents == NULL)
b34976b6 2330 return FALSE;
252b5132
RH		 2331 }
2332
ebe50bae 2333 if (htab->elf.dynamic_sections_created)
252b5132
RH		 2334 {
2335 /* Add some entries to the .dynamic section. We fill in the
2336 values later, in elf_i386_finish_dynamic_sections, but we
2337 must add the entries now so that we get the correct size for
2338 the .dynamic section. The DT_DEBUG entry is filled in by the
2339 dynamic linker and used by the debugger. */
dc810e39 2340#define add_dynamic_entry(TAG, VAL) \
5a580b3a 2341 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 2342
36af4a4e 2343 if (info->executable)
252b5132 2344 {
dc810e39 2345 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2346 return FALSE;
252b5132
RH		 2347 }
2348
eea6121a 2349 if (htab->splt->size != 0)
252b5132 2350 {
dc810e39
AM		 2351 if (!add_dynamic_entry (DT_PLTGOT, 0)
2352 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2353 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2354 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 2355 return FALSE;
252b5132
RH		 2356 }
2357
2358 if (relocs)
2359 {
dc810e39
AM		 2360 if (!add_dynamic_entry (DT_REL, 0)
2361 || !add_dynamic_entry (DT_RELSZ, 0)
2362 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 2363 return FALSE;
252b5132 2364
0c715baa
AM		 2365 /* If any dynamic relocs apply to a read-only section,
2366 then we need a DT_TEXTREL entry. */
248866a8
AM		 2367 if ((info->flags & DF_TEXTREL) == 0)
2368 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2369 (PTR) info);
0c715baa
AM		 2370
2371 if ((info->flags & DF_TEXTREL) != 0)
2372 {
2373 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2374 return FALSE;
0c715baa 2375 }
252b5132
RH		 2376 }
2377 }
dc810e39 2378#undef add_dynamic_entry
252b5132 2379
b34976b6 2380 return TRUE;
252b5132
RH		 2381}
2382
67a4f2b7
AO		 2383static bfd_boolean
2384elf_i386_always_size_sections (bfd *output_bfd,
2385 struct bfd_link_info *info)
2386{
2387 asection *tls_sec = elf_hash_table (info)->tls_sec;
2388
2389 if (tls_sec)
2390 {
2391 struct elf_link_hash_entry *tlsbase;
2392
2393 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2394 "_TLS_MODULE_BASE_",
2395 FALSE, FALSE, FALSE);
2396
2397 if (tlsbase && tlsbase->type == STT_TLS)
2398 {
2399 struct bfd_link_hash_entry *bh = NULL;
2400 const struct elf_backend_data *bed
2401 = get_elf_backend_data (output_bfd);
2402
2403 if (!(_bfd_generic_link_add_one_symbol
2404 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2405 tls_sec, 0, NULL, FALSE,
2406 bed->collect, &bh)))
2407 return FALSE;
2408 tlsbase = (struct elf_link_hash_entry *)bh;
2409 tlsbase->def_regular = 1;
2410 tlsbase->other = STV_HIDDEN;
2411 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2412 }
2413 }
2414
2415 return TRUE;
2416}
2417
38701953
AM		 2418/* Set the correct type for an x86 ELF section. We do this by the
2419 section name, which is a hack, but ought to work. */
2420
b34976b6 2421static bfd_boolean
55fd94b0
AM		 2422elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2423 Elf_Internal_Shdr *hdr,
2424 asection *sec)
38701953
AM		 2425{
2426 register const char *name;
2427
2428 name = bfd_get_section_name (abfd, sec);
2429
2430 /* This is an ugly, but unfortunately necessary hack that is
2431 needed when producing EFI binaries on x86. It tells
2432 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2433 containing ELF relocation info. We need this hack in order to
2434 be able to generate ELF binaries that can be translated into
2435 EFI applications (which are essentially COFF objects). Those
2436 files contain a COFF ".reloc" section inside an ELFNN object,
2437 which would normally cause BFD to segfault because it would
2438 attempt to interpret this section as containing relocation
2439 entries for section "oc". With this hack enabled, ".reloc"
2440 will be treated as a normal data section, which will avoid the
2441 segfault. However, you won't be able to create an ELFNN binary
2442 with a section named "oc" that needs relocations, but that's
2443 the kind of ugly side-effects you get when detecting section
2444 types based on their names... In practice, this limitation is
2445 unlikely to bite. */
2446 if (strcmp (name, ".reloc") == 0)
2447 hdr->sh_type = SHT_PROGBITS;
2448
b34976b6 2449 return TRUE;
38701953
AM		 2450}
2451
13ae64f3
JJ		 2452/* Return the base VMA address which should be subtracted from real addresses
2453 when resolving @dtpoff relocation.
2454 This is PT_TLS segment p_vaddr. */
2455
2456static bfd_vma
55fd94b0 2457dtpoff_base (struct bfd_link_info *info)
13ae64f3 2458{
e1918d23
AM		 2459 /* If tls_sec is NULL, we should have signalled an error already. */
2460 if (elf_hash_table (info)->tls_sec == NULL)
6a30718d 2461 return 0;
e1918d23 2462 return elf_hash_table (info)->tls_sec->vma;
13ae64f3
JJ		 2463}
2464
2465/* Return the relocation value for @tpoff relocation
2466 if STT_TLS virtual address is ADDRESS. */
2467
2468static bfd_vma
55fd94b0 2469tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 2470{
e1918d23 2471 struct elf_link_hash_table *htab = elf_hash_table (info);
13ae64f3 2472
e1918d23
AM		 2473 /* If tls_sec is NULL, we should have signalled an error already. */
2474 if (htab->tls_sec == NULL)
6a30718d 2475 return 0;
e1918d23 2476 return htab->tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 2477}
2478
252b5132
RH		 2479/* Relocate an i386 ELF section. */
2480
b34976b6 2481static bfd_boolean
55fd94b0
AM		 2482elf_i386_relocate_section (bfd *output_bfd,
2483 struct bfd_link_info *info,
2484 bfd *input_bfd,
2485 asection *input_section,
2486 bfd_byte *contents,
2487 Elf_Internal_Rela *relocs,
2488 Elf_Internal_Sym *local_syms,
2489 asection **local_sections)
252b5132 2490{
6725bdbf 2491 struct elf_i386_link_hash_table *htab;
252b5132
RH		 2492 Elf_Internal_Shdr *symtab_hdr;
2493 struct elf_link_hash_entry **sym_hashes;
2494 bfd_vma *local_got_offsets;
67a4f2b7 2495 bfd_vma *local_tlsdesc_gotents;
252b5132
RH		 2496 Elf_Internal_Rela *rel;
2497 Elf_Internal_Rela *relend;
2498
6725bdbf 2499 htab = elf_i386_hash_table (info);
252b5132
RH		 2500 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2501 sym_hashes = elf_sym_hashes (input_bfd);
2502 local_got_offsets = elf_local_got_offsets (input_bfd);
67a4f2b7 2503 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
252b5132 2504
252b5132
RH		 2505 rel = relocs;
2506 relend = relocs + input_section->reloc_count;
2507 for (; rel < relend; rel++)
2508 {
13ae64f3 2509 unsigned int r_type;
252b5132
RH		 2510 reloc_howto_type *howto;
2511 unsigned long r_symndx;
2512 struct elf_link_hash_entry *h;
2513 Elf_Internal_Sym *sym;
2514 asection *sec;
67a4f2b7 2515 bfd_vma off, offplt;
252b5132 2516 bfd_vma relocation;
b34976b6 2517 bfd_boolean unresolved_reloc;
252b5132 2518 bfd_reloc_status_type r;
1b452ec6 2519 unsigned int indx;
13ae64f3 2520 int tls_type;
252b5132
RH		 2521
2522 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 2523 if (r_type == R_386_GNU_VTINHERIT
2524 || r_type == R_386_GNU_VTENTRY)
252b5132 2525 continue;
dc47f327 2526
55fd94b0 2527 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 2528 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2529 >= R_386_ext - R_386_standard)
2530 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2531 >= R_386_tls - R_386_ext))
252b5132 2532 {
6ba842b6 2533 (*_bfd_error_handler)
d003868e
AM		 2534 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2535 input_bfd, input_section, r_type);
252b5132 2536 bfd_set_error (bfd_error_bad_value);
b34976b6 2537 return FALSE;
252b5132 2538 }
1b452ec6 2539 howto = elf_howto_table + indx;
252b5132
RH		 2540
2541 r_symndx = ELF32_R_SYM (rel->r_info);
252b5132
RH		 2542 h = NULL;
2543 sym = NULL;
2544 sec = NULL;
b34976b6 2545 unresolved_reloc = FALSE;
252b5132
RH		 2546 if (r_symndx < symtab_hdr->sh_info)
2547 {
2548 sym = local_syms + r_symndx;
2549 sec = local_sections[r_symndx];
2550 relocation = (sec->output_section->vma
2551 + sec->output_offset
2552 + sym->st_value);
ab96bf03
AM		 2553
2554 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2555 && ((sec->flags & SEC_MERGE) != 0
2556 || (info->relocatable
2557 && sec->output_offset != 0)))
f8df10f4 2558 {
f8df10f4 2559 bfd_vma addend;
4a335f3d 2560 bfd_byte *where = contents + rel->r_offset;
f8df10f4 2561
4a335f3d 2562 switch (howto->size)
f8df10f4 2563 {
4a335f3d
AM		 2564 case 0:
2565 addend = bfd_get_8 (input_bfd, where);
2566 if (howto->pc_relative)
2567 {
2568 addend = (addend ^ 0x80) - 0x80;
2569 addend += 1;
2570 }
2571 break;
2572 case 1:
2573 addend = bfd_get_16 (input_bfd, where);
2574 if (howto->pc_relative)
2575 {
2576 addend = (addend ^ 0x8000) - 0x8000;
2577 addend += 2;
2578 }
2579 break;
2580 case 2:
2581 addend = bfd_get_32 (input_bfd, where);
2582 if (howto->pc_relative)
2583 {
2584 addend = (addend ^ 0x80000000) - 0x80000000;
2585 addend += 4;
2586 }
2587 break;
2588 default:
2589 abort ();
f8df10f4
JJ		 2590 }
2591
ab96bf03
AM		 2592 if (info->relocatable)
2593 addend += sec->output_offset;
2594 else
2595 {
2596 asection *msec = sec;
2597 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2598 addend);
2599 addend -= relocation;
2600 addend += msec->output_section->vma + msec->output_offset;
2601 }
4a335f3d
AM		 2602
2603 switch (howto->size)
2604 {
2605 case 0:
16a10388 2606 /* FIXME: overflow checks. */
4a335f3d
AM		 2607 if (howto->pc_relative)
2608 addend -= 1;
2609 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 2610 break;
2611 case 1:
2612 if (howto->pc_relative)
2613 addend -= 2;
2614 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 2615 break;
2616 case 2:
2617 if (howto->pc_relative)
2618 addend -= 4;
2619 bfd_put_32 (input_bfd, addend, where);
2620 break;
2621 }
f8df10f4 2622 }
252b5132
RH		 2623 }
2624 else
2625 {
560e09e9 2626 bfd_boolean warned;
ffb2e45b 2627
b2a8e766
AM		 2628 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2629 r_symndx, symtab_hdr, sym_hashes,
2630 h, sec, relocation,
2631 unresolved_reloc, warned);
252b5132
RH		 2632 }
2633
ab96bf03 2634 if (sec != NULL && elf_discarded_section (sec))
9635fe29 2635 {
ab96bf03
AM		 2636 /* For relocs against symbols from removed linkonce sections,
2637 or sections discarded by a linker script, we just want the
2638 section contents zeroed. Avoid any special processing. */
b1e24c02 2639 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
ab96bf03
AM		 2640 rel->r_info = 0;
2641 rel->r_addend = 0;
b1e24c02 2642 continue;
9635fe29
AM		 2643 }
2644
ab96bf03
AM		 2645 if (info->relocatable)
2646 continue;
2647
252b5132
RH		 2648 switch (r_type)
2649 {
2650 case R_386_GOT32:
2651 /* Relocation is to the entry for this symbol in the global
2652 offset table. */
ffb2e45b
AM		 2653 if (htab->sgot == NULL)
2654 abort ();
252b5132
RH		 2655
2656 if (h != NULL)
2657 {
b34976b6 2658 bfd_boolean dyn;
252b5132
RH		 2659
2660 off = h->got.offset;
ebe50bae 2661 dyn = htab->elf.dynamic_sections_created;
26e41594 2662 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
252b5132 2663 || (info->shared
586119b3 2664 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 2665 || (ELF_ST_VISIBILITY (h->other)
2666 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2667 {
2668 /* This is actually a static link, or it is a
2669 -Bsymbolic link and the symbol is defined
2670 locally, or the symbol was forced to be local
2671 because of a version file. We must initialize
2672 this entry in the global offset table. Since the
2673 offset must always be a multiple of 4, we use the
2674 least significant bit to record whether we have
2675 initialized it already.
2676
2677 When doing a dynamic link, we create a .rel.got
2678 relocation entry to initialize the value. This
2679 is done in the finish_dynamic_symbol routine. */
2680 if ((off & 1) != 0)
2681 off &= ~1;
2682 else
2683 {
2684 bfd_put_32 (output_bfd, relocation,
6725bdbf 2685 htab->sgot->contents + off);
252b5132
RH		 2686 h->got.offset |= 1;
2687 }
2688 }
8c694914 2689 else
b34976b6 2690 unresolved_reloc = FALSE;
252b5132
RH		 2691 }
2692 else
2693 {
ffb2e45b
AM		 2694 if (local_got_offsets == NULL)
2695 abort ();
252b5132
RH		 2696
2697 off = local_got_offsets[r_symndx];
2698
2699 /* The offset must always be a multiple of 4. We use
83be169b
AM		 2700 the least significant bit to record whether we have
2701 already generated the necessary reloc. */
252b5132
RH		 2702 if ((off & 1) != 0)
2703 off &= ~1;
2704 else
2705 {
6725bdbf
AM		 2706 bfd_put_32 (output_bfd, relocation,
2707 htab->sgot->contents + off);
252b5132
RH		 2708
2709 if (info->shared)
2710 {
947216bf
AM		 2711 asection *s;
2712 Elf_Internal_Rela outrel;
2713 bfd_byte *loc;
252b5132 2714
947216bf
AM		 2715 s = htab->srelgot;
2716 if (s == NULL)
ffb2e45b 2717 abort ();
252b5132 2718
6725bdbf
AM		 2719 outrel.r_offset = (htab->sgot->output_section->vma
2720 + htab->sgot->output_offset
252b5132
RH		 2721 + off);
2722 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
947216bf
AM		 2723 loc = s->contents;
2724 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 2725 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132
RH		 2726 }
2727
2728 local_got_offsets[r_symndx] |= 1;
2729 }
252b5132
RH		 2730 }
2731
ffb2e45b
AM		 2732 if (off >= (bfd_vma) -2)
2733 abort ();
2734
8c37241b
JJ		 2735 relocation = htab->sgot->output_section->vma
2736 + htab->sgot->output_offset + off
2737 - htab->sgotplt->output_section->vma
2738 - htab->sgotplt->output_offset;
252b5132
RH		 2739 break;
2740
2741 case R_386_GOTOFF:
2742 /* Relocation is relative to the start of the global offset
2743 table. */
2744
90f487df
L		 2745 /* Check to make sure it isn't a protected function symbol
2746 for shared library since it may not be local when used
2747 as function address. */
2748 if (info->shared
8fe76924 2749 && !info->executable
90f487df
L		 2750 && h
2751 && h->def_regular
2752 && h->type == STT_FUNC
2753 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2754 {
2755 (*_bfd_error_handler)
2756 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2757 input_bfd, h->root.root.string);
2758 bfd_set_error (bfd_error_bad_value);
2759 return FALSE;
2760 }
2761
8c37241b
JJ		 2762 /* Note that sgot is not involved in this
2763 calculation. We always want the start of .got.plt. If we
2764 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 2765 permitted by the ABI, we might have to change this
2766 calculation. */
8c37241b
JJ		 2767 relocation -= htab->sgotplt->output_section->vma
2768 + htab->sgotplt->output_offset;
252b5132
RH		 2769 break;
2770
2771 case R_386_GOTPC:
2772 /* Use global offset table as symbol value. */
8c37241b
JJ		 2773 relocation = htab->sgotplt->output_section->vma
2774 + htab->sgotplt->output_offset;
b34976b6 2775 unresolved_reloc = FALSE;
252b5132
RH		 2776 break;
2777
2778 case R_386_PLT32:
2779 /* Relocation is to the entry for this symbol in the
2780 procedure linkage table. */
2781
dd5724d5 2782 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 2783 without using the procedure linkage table. */
252b5132
RH		 2784 if (h == NULL)
2785 break;
2786
dd5724d5 2787 if (h->plt.offset == (bfd_vma) -1
6725bdbf 2788 || htab->splt == NULL)
252b5132
RH		 2789 {
2790 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 2791 happens when statically linking PIC code, or when
2792 using -Bsymbolic. */
252b5132
RH		 2793 break;
2794 }
2795
6725bdbf
AM		 2796 relocation = (htab->splt->output_section->vma
2797 + htab->splt->output_offset
252b5132 2798 + h->plt.offset);
b34976b6 2799 unresolved_reloc = FALSE;
252b5132
RH		 2800 break;
2801
2802 case R_386_32:
2803 case R_386_PC32:
f855931b 2804 if ((input_section->flags & SEC_ALLOC) == 0)
ec338859
AM		 2805 break;
2806
12d0ee4a 2807 if ((info->shared
ef5aade5
L		 2808 && (h == NULL
2809 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2810 || h->root.type != bfd_link_hash_undefweak)
12d0ee4a 2811 && (r_type != R_386_PC32
f6c52c13 2812 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845
AM		 2813 || (ELIMINATE_COPY_RELOCS
2814 && !info->shared
12d0ee4a
AM		 2815 && h != NULL
2816 && h->dynindx != -1
f5385ebf
AM		 2817 && !h->non_got_ref
2818 && ((h->def_dynamic
2819 && !h->def_regular)
28d0b90e
AM		 2820 || h->root.type == bfd_link_hash_undefweak
2821 || h->root.type == bfd_link_hash_undefined)))
252b5132 2822 {
947216bf
AM		 2823 Elf_Internal_Rela outrel;
2824 bfd_byte *loc;
b34976b6 2825 bfd_boolean skip, relocate;
0c715baa 2826 asection *sreloc;
252b5132
RH		 2827
2828 /* When generating a shared object, these relocations
2829 are copied into the output file to be resolved at run
2830 time. */
2831
b34976b6
AM		 2832 skip = FALSE;
2833 relocate = FALSE;
252b5132 2834
c629eae0
JJ		 2835 outrel.r_offset =
2836 _bfd_elf_section_offset (output_bfd, info, input_section,
2837 rel->r_offset);
2838 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2839 skip = TRUE;
0bb2d96a 2840 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2841 skip = TRUE, relocate = TRUE;
252b5132
RH		 2842 outrel.r_offset += (input_section->output_section->vma
2843 + input_section->output_offset);
2844
2845 if (skip)
0bb2d96a 2846 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 2847 else if (h != NULL
2848 && h->dynindx != -1
2849 && (r_type == R_386_PC32
2850 || !info->shared
55255dae 2851 || !SYMBOLIC_BIND (info, h)
f5385ebf 2852 || !h->def_regular))
0bb2d96a 2853 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2854 else
2855 {
5a15f56f 2856 /* This symbol is local, or marked to become local. */
b34976b6 2857 relocate = TRUE;
5a15f56f 2858 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 2859 }
2860
0c715baa
AM		 2861 sreloc = elf_section_data (input_section)->sreloc;
2862 if (sreloc == NULL)
2863 abort ();
2864
947216bf
AM		 2865 loc = sreloc->contents;
2866 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
0c715baa 2867 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132
RH		 2868
2869 /* If this reloc is against an external symbol, we do
2870 not want to fiddle with the addend. Otherwise, we
2871 need to include the symbol value so that it becomes
2872 an addend for the dynamic reloc. */
2873 if (! relocate)
2874 continue;
2875 }
252b5132
RH		 2876 break;
2877
37e55690
JJ		 2878 case R_386_TLS_IE:
2879 if (info->shared)
2880 {
947216bf
AM		 2881 Elf_Internal_Rela outrel;
2882 bfd_byte *loc;
37e55690 2883 asection *sreloc;
37e55690
JJ		 2884
2885 outrel.r_offset = rel->r_offset
2886 + input_section->output_section->vma
2887 + input_section->output_offset;
2888 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2889 sreloc = elf_section_data (input_section)->sreloc;
2890 if (sreloc == NULL)
2891 abort ();
947216bf
AM		 2892 loc = sreloc->contents;
2893 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
37e55690
JJ		 2894 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2895 }
2896 /* Fall through */
2897
13ae64f3 2898 case R_386_TLS_GD:
67a4f2b7
AO		 2899 case R_386_TLS_GOTDESC:
2900 case R_386_TLS_DESC_CALL:
13ae64f3 2901 case R_386_TLS_IE_32:
37e55690 2902 case R_386_TLS_GOTIE:
13ae64f3
JJ		 2903 tls_type = GOT_UNKNOWN;
2904 if (h == NULL && local_got_offsets)
2905 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2906 else if (h != NULL)
142411ca 2907 tls_type = elf_i386_hash_entry(h)->tls_type;
37e55690
JJ		 2908 if (tls_type == GOT_TLS_IE)
2909 tls_type = GOT_TLS_IE_NEG;
142411ca
L		 2910
2911 if (! elf_i386_tls_transition (info, input_bfd,
2912 input_section, contents,
2913 symtab_hdr, sym_hashes,
2914 &r_type, tls_type, rel,
2915 relend, h))
2916 return FALSE;
13ae64f3
JJ		 2917
2918 if (r_type == R_386_TLS_LE_32)
2919 {
82e51918 2920 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 2921 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2922 {
142411ca 2923 unsigned int type;
13ae64f3
JJ		 2924 bfd_vma roff;
2925
2926 /* GD->LE transition. */
13ae64f3 2927 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ		 2928 if (type == 0x04)
2929 {
2930 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2931 Change it into:
2932 movl %gs:0, %eax; subl $foo@tpoff, %eax
2933 (6 byte form of subl). */
13ae64f3
JJ		 2934 memcpy (contents + rel->r_offset - 3,
2935 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
142411ca 2936 roff = rel->r_offset + 5;
13ae64f3
JJ		 2937 }
2938 else
2939 {
142411ca
L		 2940 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2941 Change it into:
2942 movl %gs:0, %eax; subl $foo@tpoff, %eax
2943 (6 byte form of subl). */
2944 memcpy (contents + rel->r_offset - 2,
2945 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2946 roff = rel->r_offset + 6;
13ae64f3
JJ		 2947 }
2948 bfd_put_32 (output_bfd, tpoff (info, relocation),
2949 contents + roff);
a3fadc9a 2950 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3
JJ		 2951 rel++;
2952 continue;
2953 }
67a4f2b7
AO		 2954 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
2955 {
2956 /* GDesc -> LE transition.
2957 It's originally something like:
2958 leal x@tlsdesc(%ebx), %eax
2959
2960 leal x@ntpoff, %eax
2961
2962 Registers other than %eax may be set up here. */
2963
142411ca 2964 unsigned int val;
67a4f2b7
AO		 2965 bfd_vma roff;
2966
67a4f2b7 2967 roff = rel->r_offset;
67a4f2b7 2968 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 2969
2970 /* Now modify the instruction as appropriate. */
2971 /* aoliva FIXME: remove the above and xor the byte
2972 below with 0x86. */
2973 bfd_put_8 (output_bfd, val ^ 0x86,
2974 contents + roff - 1);
2975 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2976 contents + roff);
2977 continue;
2978 }
2979 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
2980 {
2981 /* GDesc -> LE transition.
2982 It's originally:
2983 call *(%eax)
2984 Turn it into:
142411ca 2985 xchg %ax,%ax */
67a4f2b7 2986
67a4f2b7 2987 bfd_vma roff;
142411ca 2988
67a4f2b7 2989 roff = rel->r_offset;
10efb593 2990 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 2991 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2992 continue;
2993 }
37e55690 2994 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3 2995 {
142411ca 2996 unsigned int val;
13ae64f3
JJ		 2997
2998 /* IE->LE transition:
37e55690
JJ		 2999 Originally it can be one of:
3000 movl foo, %eax
3001 movl foo, %reg
3002 addl foo, %reg
3003 We change it into:
3004 movl $foo, %eax
3005 movl $foo, %reg
3006 addl $foo, %reg. */
37e55690 3007 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
37e55690
JJ		 3008 if (val == 0xa1)
3009 {
3010 /* movl foo, %eax. */
55fd94b0
AM		 3011 bfd_put_8 (output_bfd, 0xb8,
3012 contents + rel->r_offset - 1);
37e55690 3013 }
299bf759 3014 else
37e55690 3015 {
142411ca
L		 3016 unsigned int type;
3017
55fd94b0
AM		 3018 type = bfd_get_8 (input_bfd,
3019 contents + rel->r_offset - 2);
299bf759 3020 switch (type)
26e41594 3021 {
299bf759
L		 3022 case 0x8b:
3023 /* movl */
299bf759
L		 3024 bfd_put_8 (output_bfd, 0xc7,
3025 contents + rel->r_offset - 2);
3026 bfd_put_8 (output_bfd,
3027 0xc0 | ((val >> 3) & 7),
3028 contents + rel->r_offset - 1);
3029 break;
3030 case 0x03:
3031 /* addl */
299bf759
L		 3032 bfd_put_8 (output_bfd, 0x81,
3033 contents + rel->r_offset - 2);
3034 bfd_put_8 (output_bfd,
3035 0xc0 | ((val >> 3) & 7),
3036 contents + rel->r_offset - 1);
3037 break;
3038 default:
3039 BFD_FAIL ();
3040 break;
26e41594 3041 }
37e55690 3042 }
37e55690
JJ		 3043 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3044 contents + rel->r_offset);
3045 continue;
3046 }
3047 else
3048 {
3049 unsigned int val, type;
3050
3051 /* {IE_32,GOTIE}->LE transition:
3052 Originally it can be one of:
13ae64f3 3053 subl foo(%reg1), %reg2
13ae64f3 3054 movl foo(%reg1), %reg2
37e55690 3055 addl foo(%reg1), %reg2
13ae64f3
JJ		 3056 We change it into:
3057 subl $foo, %reg2
37e55690
JJ		 3058 movl $foo, %reg2 (6 byte form)
3059 addl $foo, %reg2. */
13ae64f3
JJ		 3060 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3061 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
13ae64f3
JJ		 3062 if (type == 0x8b)
3063 {
3064 /* movl */
13ae64f3
JJ		 3065 bfd_put_8 (output_bfd, 0xc7,
3066 contents + rel->r_offset - 2);
3067 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3068 contents + rel->r_offset - 1);
3069 }
3070 else if (type == 0x2b)
3071 {
3072 /* subl */
13ae64f3
JJ		 3073 bfd_put_8 (output_bfd, 0x81,
3074 contents + rel->r_offset - 2);
3075 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3076 contents + rel->r_offset - 1);
3077 }
37e55690
JJ		 3078 else if (type == 0x03)
3079 {
3080 /* addl */
3081 bfd_put_8 (output_bfd, 0x81,
3082 contents + rel->r_offset - 2);
3083 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3084 contents + rel->r_offset - 1);
3085 }
13ae64f3
JJ		 3086 else
3087 BFD_FAIL ();
37e55690
JJ		 3088 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3089 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3090 contents + rel->r_offset);
3091 else
3092 bfd_put_32 (output_bfd, tpoff (info, relocation),
3093 contents + rel->r_offset);
13ae64f3
JJ		 3094 continue;
3095 }
3096 }
3097
3098 if (htab->sgot == NULL)
3099 abort ();
3100
3101 if (h != NULL)
67a4f2b7
AO		 3102 {
3103 off = h->got.offset;
3104 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3105 }
13ae64f3
JJ		 3106 else
3107 {
3108 if (local_got_offsets == NULL)
3109 abort ();
3110
3111 off = local_got_offsets[r_symndx];
67a4f2b7 3112 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 3113 }
3114
3115 if ((off & 1) != 0)
3116 off &= ~1;
26e41594 3117 else
13ae64f3 3118 {
947216bf
AM		 3119 Elf_Internal_Rela outrel;
3120 bfd_byte *loc;
13ae64f3 3121 int dr_type, indx;
67a4f2b7 3122 asection *sreloc;
13ae64f3
JJ		 3123
3124 if (htab->srelgot == NULL)
3125 abort ();
3126
67a4f2b7
AO		 3127 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3128
3129 if (GOT_TLS_GDESC_P (tls_type))
3130 {
3131 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3132 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3133 <= htab->sgotplt->size);
3134 outrel.r_offset = (htab->sgotplt->output_section->vma
3135 + htab->sgotplt->output_offset
3136 + offplt
3137 + htab->sgotplt_jump_table_size);
3138 sreloc = htab->srelplt;
3139 loc = sreloc->contents;
5ae0bfb6
RS		 3140 loc += (htab->next_tls_desc_index++
3141 * sizeof (Elf32_External_Rel));
67a4f2b7
AO		 3142 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3143 <= sreloc->contents + sreloc->size);
3144 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3145 if (indx == 0)
3146 {
3147 BFD_ASSERT (! unresolved_reloc);
3148 bfd_put_32 (output_bfd,
3149 relocation - dtpoff_base (info),
3150 htab->sgotplt->contents + offplt
3151 + htab->sgotplt_jump_table_size + 4);
3152 }
3153 else
3154 {
3155 bfd_put_32 (output_bfd, 0,
3156 htab->sgotplt->contents + offplt
3157 + htab->sgotplt_jump_table_size + 4);
3158 }
3159 }
3160
3161 sreloc = htab->srelgot;
3162
13ae64f3
JJ		 3163 outrel.r_offset = (htab->sgot->output_section->vma
3164 + htab->sgot->output_offset + off);
3165
67a4f2b7 3166 if (GOT_TLS_GD_P (tls_type))
13ae64f3 3167 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 3168 else if (GOT_TLS_GDESC_P (tls_type))
3169 goto dr_done;
37e55690
JJ		 3170 else if (tls_type == GOT_TLS_IE_POS)
3171 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 3172 else
3173 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 3174
37e55690
JJ		 3175 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3176 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3177 htab->sgot->contents + off);
3178 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
c5c1f40c 3179 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
c366c25e 3180 htab->sgot->contents + off);
67a4f2b7 3181 else if (dr_type != R_386_TLS_DESC)
c366c25e
JJ		 3182 bfd_put_32 (output_bfd, 0,
3183 htab->sgot->contents + off);
13ae64f3 3184 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7
AO		 3185
3186 loc = sreloc->contents;
3187 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3188 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3189 <= sreloc->contents + sreloc->size);
13ae64f3
JJ		 3190 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3191
67a4f2b7 3192 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 3193 {
3194 if (indx == 0)
3195 {
82e51918 3196 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 3197 bfd_put_32 (output_bfd,
3198 relocation - dtpoff_base (info),
3199 htab->sgot->contents + off + 4);
3200 }
3201 else
3202 {
3203 bfd_put_32 (output_bfd, 0,
3204 htab->sgot->contents + off + 4);
3205 outrel.r_info = ELF32_R_INFO (indx,
3206 R_386_TLS_DTPOFF32);
3207 outrel.r_offset += 4;
67a4f2b7 3208 sreloc->reloc_count++;
947216bf 3209 loc += sizeof (Elf32_External_Rel);
67a4f2b7
AO		 3210 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3211 <= sreloc->contents + sreloc->size);
947216bf 3212 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
13ae64f3
JJ		 3213 }
3214 }
37e55690
JJ		 3215 else if (tls_type == GOT_TLS_IE_BOTH)
3216 {
3217 bfd_put_32 (output_bfd,
3218 indx == 0 ? relocation - dtpoff_base (info) : 0,
3219 htab->sgot->contents + off + 4);
3220 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3221 outrel.r_offset += 4;
67a4f2b7 3222 sreloc->reloc_count++;
947216bf 3223 loc += sizeof (Elf32_External_Rel);
37e55690
JJ		 3224 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3225 }
13ae64f3 3226
67a4f2b7 3227 dr_done:
13ae64f3
JJ		 3228 if (h != NULL)
3229 h->got.offset |= 1;
3230 else
3231 local_got_offsets[r_symndx] |= 1;
3232 }
3233
67a4f2b7
AO		 3234 if (off >= (bfd_vma) -2
3235 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 3236 abort ();
67a4f2b7
AO		 3237 if (r_type == R_386_TLS_GOTDESC
3238 || r_type == R_386_TLS_DESC_CALL)
3239 {
3240 relocation = htab->sgotplt_jump_table_size + offplt;
3241 unresolved_reloc = FALSE;
3242 }
3243 else if (r_type == ELF32_R_TYPE (rel->r_info))
13ae64f3 3244 {
8c37241b
JJ		 3245 bfd_vma g_o_t = htab->sgotplt->output_section->vma
3246 + htab->sgotplt->output_offset;
3247 relocation = htab->sgot->output_section->vma
67a4f2b7 3248 + htab->sgot->output_offset + off - g_o_t;
37e55690
JJ		 3249 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3250 && tls_type == GOT_TLS_IE_BOTH)
3251 relocation += 4;
3252 if (r_type == R_386_TLS_IE)
8c37241b 3253 relocation += g_o_t;
b34976b6 3254 unresolved_reloc = FALSE;
13ae64f3 3255 }
67a4f2b7 3256 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
13ae64f3
JJ		 3257 {
3258 unsigned int val, type;
3259 bfd_vma roff;
3260
3261 /* GD->IE transition. */
13ae64f3 3262 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
13ae64f3
JJ		 3263 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3264 if (type == 0x04)
3265 {
3266 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3267 Change it into:
3268 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3 3269 val >>= 3;
142411ca 3270 roff = rel->r_offset - 3;
13ae64f3
JJ		 3271 }
3272 else
3273 {
3274 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3275 Change it into:
3276 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
13ae64f3
JJ		 3277 roff = rel->r_offset - 2;
3278 }
3279 memcpy (contents + roff,
3280 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3281 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 3282 /* If foo is used only with foo@gotntpoff(%reg) and
3283 foo@indntpoff, but not with foo@gottpoff(%reg), change
3284 subl $foo@gottpoff(%reg), %eax
3285 into:
3286 addl $foo@gotntpoff(%reg), %eax. */
ebcfb3c0
JJ		 3287 if (tls_type == GOT_TLS_IE_POS)
3288 contents[roff + 6] = 0x03;
8c37241b
JJ		 3289 bfd_put_32 (output_bfd,
3290 htab->sgot->output_section->vma
3291 + htab->sgot->output_offset + off
3292 - htab->sgotplt->output_section->vma
3293 - htab->sgotplt->output_offset,
13ae64f3
JJ		 3294 contents + roff + 8);
3295 /* Skip R_386_PLT32. */
3296 rel++;
3297 continue;
3298 }
67a4f2b7
AO		 3299 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3300 {
3301 /* GDesc -> IE transition.
3302 It's originally something like:
3303 leal x@tlsdesc(%ebx), %eax
3304
3305 Change it to:
142411ca 3306 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
67a4f2b7
AO		 3307 or:
3308 movl x@gottpoff(%ebx), %eax # before negl %eax
3309
3310 Registers other than %eax may be set up here. */
3311
67a4f2b7
AO		 3312 bfd_vma roff;
3313
3314 /* First, make sure it's a leal adding ebx to a 32-bit
3315 offset into any register, although it's probably
3316 almost always going to be eax. */
3317 roff = rel->r_offset;
67a4f2b7
AO		 3318
3319 /* Now modify the instruction as appropriate. */
3320 /* To turn a leal into a movl in the form we use it, it
3321 suffices to change the first byte from 0x8d to 0x8b.
3322 aoliva FIXME: should we decide to keep the leal, all
3323 we have to do is remove the statement below, and
3324 adjust the relaxation of R_386_TLS_DESC_CALL. */
3325 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3326
3327 if (tls_type == GOT_TLS_IE_BOTH)
3328 off += 4;
3329
3330 bfd_put_32 (output_bfd,
3331 htab->sgot->output_section->vma
3332 + htab->sgot->output_offset + off
3333 - htab->sgotplt->output_section->vma
3334 - htab->sgotplt->output_offset,
3335 contents + roff);
3336 continue;
3337 }
3338 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3339 {
3340 /* GDesc -> IE transition.
3341 It's originally:
3342 call *(%eax)
3343
3344 Change it to:
142411ca 3345 xchg %ax,%ax
67a4f2b7
AO		 3346 or
3347 negl %eax
3348 depending on how we transformed the TLS_GOTDESC above.
3349 */
3350
67a4f2b7
AO		 3351 bfd_vma roff;
3352
67a4f2b7 3353 roff = rel->r_offset;
67a4f2b7
AO		 3354
3355 /* Now modify the instruction as appropriate. */
3356 if (tls_type != GOT_TLS_IE_NEG)
3357 {
10efb593
L		 3358 /* xchg %ax,%ax */
3359 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3360 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3361 }
3362 else
3363 {
3364 /* negl %eax */
3365 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3366 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3367 }
3368
3369 continue;
3370 }
3371 else
3372 BFD_ASSERT (FALSE);
13ae64f3
JJ		 3373 break;
3374
3375 case R_386_TLS_LDM:
142411ca
L		 3376 if (! elf_i386_tls_transition (info, input_bfd,
3377 input_section, contents,
3378 symtab_hdr, sym_hashes,
3379 &r_type, GOT_UNKNOWN, rel,
3380 relend, h))
3381 return FALSE;
13ae64f3 3382
142411ca
L		 3383 if (r_type != R_386_TLS_LDM)
3384 {
13ae64f3 3385 /* LD->LE transition:
13ae64f3
JJ		 3386 leal foo(%reg), %eax; call ___tls_get_addr.
3387 We change it into:
3388 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
142411ca 3389 BFD_ASSERT (r_type == R_386_TLS_LE_32);
13ae64f3
JJ		 3390 memcpy (contents + rel->r_offset - 2,
3391 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
a3fadc9a 3392 /* Skip R_386_PC32/R_386_PLT32. */
13ae64f3
JJ		 3393 rel++;
3394 continue;
3395 }
3396
3397 if (htab->sgot == NULL)
3398 abort ();
3399
3400 off = htab->tls_ldm_got.offset;
3401 if (off & 1)
3402 off &= ~1;
3403 else
3404 {
947216bf
AM		 3405 Elf_Internal_Rela outrel;
3406 bfd_byte *loc;
13ae64f3
JJ		 3407
3408 if (htab->srelgot == NULL)
3409 abort ();
3410
3411 outrel.r_offset = (htab->sgot->output_section->vma
3412 + htab->sgot->output_offset + off);
3413
3414 bfd_put_32 (output_bfd, 0,
3415 htab->sgot->contents + off);
3416 bfd_put_32 (output_bfd, 0,
3417 htab->sgot->contents + off + 4);
3418 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
947216bf
AM		 3419 loc = htab->srelgot->contents;
3420 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
13ae64f3
JJ		 3421 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3422 htab->tls_ldm_got.offset |= 1;
3423 }
8c37241b
JJ		 3424 relocation = htab->sgot->output_section->vma
3425 + htab->sgot->output_offset + off
3426 - htab->sgotplt->output_section->vma
3427 - htab->sgotplt->output_offset;
b34976b6 3428 unresolved_reloc = FALSE;
13ae64f3
JJ		 3429 break;
3430
3431 case R_386_TLS_LDO_32:
a45bb67d 3432 if (info->shared || (input_section->flags & SEC_CODE) == 0)
13ae64f3
JJ		 3433 relocation -= dtpoff_base (info);
3434 else
3435 /* When converting LDO to LE, we must negate. */
3436 relocation = -tpoff (info, relocation);
3437 break;
3438
3439 case R_386_TLS_LE_32:
13ae64f3 3440 case R_386_TLS_LE:
37e55690
JJ		 3441 if (info->shared)
3442 {
947216bf 3443 Elf_Internal_Rela outrel;
37e55690 3444 asection *sreloc;
947216bf 3445 bfd_byte *loc;
37e55690
JJ		 3446 int indx;
3447
3448 outrel.r_offset = rel->r_offset
3449 + input_section->output_section->vma
3450 + input_section->output_offset;
3451 if (h != NULL && h->dynindx != -1)
3452 indx = h->dynindx;
3453 else
3454 indx = 0;
3455 if (r_type == R_386_TLS_LE_32)
3456 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3457 else
3458 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3459 sreloc = elf_section_data (input_section)->sreloc;
3460 if (sreloc == NULL)
3461 abort ();
947216bf
AM		 3462 loc = sreloc->contents;
3463 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
37e55690
JJ		 3464 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3465 if (indx)
3466 continue;
3467 else if (r_type == R_386_TLS_LE_32)
3468 relocation = dtpoff_base (info) - relocation;
3469 else
3470 relocation -= dtpoff_base (info);
3471 }
3472 else if (r_type == R_386_TLS_LE_32)
3473 relocation = tpoff (info, relocation);
3474 else
3475 relocation = -tpoff (info, relocation);
13ae64f3
JJ		 3476 break;
3477
252b5132
RH		 3478 default:
3479 break;
3480 }
3481
239e1f3a
AM		 3482 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3483 because such sections are not SEC_ALLOC and thus ld.so will
3484 not process them. */
8c694914 3485 if (unresolved_reloc
239e1f3a 3486 && !((input_section->flags & SEC_DEBUGGING) != 0
f5385ebf 3487 && h->def_dynamic))
6a30718d
JJ		 3488 {
3489 (*_bfd_error_handler)
843fe662 3490 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3491 input_bfd,
3492 input_section,
6a30718d 3493 (long) rel->r_offset,
843fe662 3494 howto->name,
6a30718d 3495 h->root.root.string);
b34976b6 3496 return FALSE;
6a30718d 3497 }
83be169b 3498
252b5132
RH		 3499 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3500 contents, rel->r_offset,
55fd94b0 3501 relocation, 0);
252b5132 3502
cf5c0c5b 3503 if (r != bfd_reloc_ok)
252b5132 3504 {
cf5c0c5b 3505 const char *name;
ffb2e45b 3506
cf5c0c5b
AM		 3507 if (h != NULL)
3508 name = h->root.root.string;
3509 else
3510 {
3511 name = bfd_elf_string_from_elf_section (input_bfd,
3512 symtab_hdr->sh_link,
3513 sym->st_name);
3514 if (name == NULL)
b34976b6 3515 return FALSE;
cf5c0c5b
AM		 3516 if (*name == '\0')
3517 name = bfd_section_name (input_bfd, sec);
3518 }
ffb2e45b 3519
cf5c0c5b
AM		 3520 if (r == bfd_reloc_overflow)
3521 {
cf5c0c5b 3522 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 3523 (info, (h ? &h->root : NULL), name, howto->name,
3524 (bfd_vma) 0, input_bfd, input_section,
3525 rel->r_offset)))
b34976b6 3526 return FALSE;
cf5c0c5b
AM		 3527 }
3528 else
3529 {
3530 (*_bfd_error_handler)
d003868e
AM		 3531 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3532 input_bfd, input_section,
cf5c0c5b 3533 (long) rel->r_offset, name, (int) r);
b34976b6 3534 return FALSE;
cf5c0c5b 3535 }
252b5132
RH		 3536 }
3537 }
3538
b34976b6 3539 return TRUE;
252b5132
RH		 3540}
3541
3542/* Finish up dynamic symbol handling. We set the contents of various
3543 dynamic sections here. */
3544
b34976b6 3545static bfd_boolean
55fd94b0
AM		 3546elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3547 struct bfd_link_info *info,
3548 struct elf_link_hash_entry *h,
3549 Elf_Internal_Sym *sym)
252b5132 3550{
6725bdbf 3551 struct elf_i386_link_hash_table *htab;
252b5132 3552
6725bdbf 3553 htab = elf_i386_hash_table (info);
252b5132
RH		 3554
3555 if (h->plt.offset != (bfd_vma) -1)
3556 {
252b5132
RH		 3557 bfd_vma plt_index;
3558 bfd_vma got_offset;
947216bf
AM		 3559 Elf_Internal_Rela rel;
3560 bfd_byte *loc;
252b5132
RH		 3561
3562 /* This symbol has an entry in the procedure linkage table. Set
3563 it up. */
3564
ffb2e45b
AM		 3565 if (h->dynindx == -1
3566 || htab->splt == NULL
3567 || htab->sgotplt == NULL
3568 || htab->srelplt == NULL)
3569 abort ();
252b5132
RH		 3570
3571 /* Get the index in the procedure linkage table which
3572 corresponds to this symbol. This is the index of this symbol
3573 in all the symbols for which we are making plt entries. The
3574 first entry in the procedure linkage table is reserved. */
3575 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3576
3577 /* Get the offset into the .got table of the entry that
3578 corresponds to this function. Each .got entry is 4 bytes.
3579 The first three are reserved. */
3580 got_offset = (plt_index + 3) * 4;
3581
3582 /* Fill in the entry in the procedure linkage table. */
3583 if (! info->shared)
3584 {
6725bdbf 3585 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
252b5132
RH		 3586 PLT_ENTRY_SIZE);
3587 bfd_put_32 (output_bfd,
6725bdbf
AM		 3588 (htab->sgotplt->output_section->vma
3589 + htab->sgotplt->output_offset
252b5132 3590 + got_offset),
6725bdbf 3591 htab->splt->contents + h->plt.offset + 2);
eac338cf
PB		 3592
3593 if (htab->is_vxworks)
3594 {
3595 int s, k, reloc_index;
3596
3597 /* Create the R_386_32 relocation referencing the GOT
3598 for this PLT entry. */
3599
3600 /* S: Current slot number (zero-based). */
3601 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3602 /* K: Number of relocations for PLTResolve. */
3603 if (info->shared)
3604 k = PLTRESOLVE_RELOCS_SHLIB;
3605 else
3606 k = PLTRESOLVE_RELOCS;
3607 /* Skip the PLTresolve relocations, and the relocations for
3608 the other PLT slots. */
3609 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3610 loc = (htab->srelplt2->contents + reloc_index
3611 * sizeof (Elf32_External_Rel));
3612
3613 rel.r_offset = (htab->splt->output_section->vma
3614 + htab->splt->output_offset
3615 + h->plt.offset + 2),
7325306f 3616 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3617 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3618
3619 /* Create the R_386_32 relocation referencing the beginning of
3620 the PLT for this GOT entry. */
3621 rel.r_offset = (htab->sgotplt->output_section->vma
3622 + htab->sgotplt->output_offset
3623 + got_offset);
7325306f 3624 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf
PB		 3625 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3626 loc + sizeof (Elf32_External_Rel));
3627 }
252b5132
RH		 3628 }
3629 else
3630 {
6725bdbf 3631 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
252b5132
RH		 3632 PLT_ENTRY_SIZE);
3633 bfd_put_32 (output_bfd, got_offset,
6725bdbf 3634 htab->splt->contents + h->plt.offset + 2);
252b5132
RH		 3635 }
3636
3637 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
6725bdbf 3638 htab->splt->contents + h->plt.offset + 7);
252b5132 3639 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
6725bdbf 3640 htab->splt->contents + h->plt.offset + 12);
252b5132
RH		 3641
3642 /* Fill in the entry in the global offset table. */
3643 bfd_put_32 (output_bfd,
6725bdbf
AM		 3644 (htab->splt->output_section->vma
3645 + htab->splt->output_offset
252b5132
RH		 3646 + h->plt.offset
3647 + 6),
6725bdbf 3648 htab->sgotplt->contents + got_offset);
252b5132
RH		 3649
3650 /* Fill in the entry in the .rel.plt section. */
6725bdbf
AM		 3651 rel.r_offset = (htab->sgotplt->output_section->vma
3652 + htab->sgotplt->output_offset
252b5132
RH		 3653 + got_offset);
3654 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
947216bf 3655 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
0ac8d2ca 3656 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132 3657
f5385ebf 3658 if (!h->def_regular)
252b5132
RH		 3659 {
3660 /* Mark the symbol as undefined, rather than as defined in
c6585bbb
JJ		 3661 the .plt section. Leave the value if there were any
3662 relocations where pointer equality matters (this is a clue
51b64d56
AM		 3663 for the dynamic linker, to make function pointer
3664 comparisons work between an application and shared
c6585bbb
JJ		 3665 library), otherwise set it to zero. If a function is only
3666 called from a binary, there is no need to slow down
3667 shared libraries because of that. */
252b5132 3668 sym->st_shndx = SHN_UNDEF;
f5385ebf 3669 if (!h->pointer_equality_needed)
c6585bbb 3670 sym->st_value = 0;
252b5132
RH		 3671 }
3672 }
3673
13ae64f3 3674 if (h->got.offset != (bfd_vma) -1
67a4f2b7 3675 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
37e55690 3676 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
252b5132 3677 {
947216bf
AM		 3678 Elf_Internal_Rela rel;
3679 bfd_byte *loc;
252b5132
RH		 3680
3681 /* This symbol has an entry in the global offset table. Set it
3682 up. */
3683
ffb2e45b
AM		 3684 if (htab->sgot == NULL || htab->srelgot == NULL)
3685 abort ();
252b5132 3686
6725bdbf
AM		 3687 rel.r_offset = (htab->sgot->output_section->vma
3688 + htab->sgot->output_offset
dc810e39 3689 + (h->got.offset & ~(bfd_vma) 1));
252b5132 3690
dd5724d5
AM		 3691 /* If this is a static link, or it is a -Bsymbolic link and the
3692 symbol is defined locally or was forced to be local because
3693 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 3694 The entry in the global offset table will already have been
3695 initialized in the relocate_section function. */
6725bdbf 3696 if (info->shared
586119b3 3697 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 3698 {
6725bdbf 3699 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 3700 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3701 }
252b5132
RH		 3702 else
3703 {
dd5724d5 3704 BFD_ASSERT((h->got.offset & 1) == 0);
6725bdbf
AM		 3705 bfd_put_32 (output_bfd, (bfd_vma) 0,
3706 htab->sgot->contents + h->got.offset);
252b5132
RH		 3707 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3708 }
3709
947216bf
AM		 3710 loc = htab->srelgot->contents;
3711 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 3712 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 3713 }
3714
f5385ebf 3715 if (h->needs_copy)
252b5132 3716 {
947216bf
AM		 3717 Elf_Internal_Rela rel;
3718 bfd_byte *loc;
252b5132
RH		 3719
3720 /* This symbol needs a copy reloc. Set it up. */
3721
ffb2e45b
AM		 3722 if (h->dynindx == -1
3723 || (h->root.type != bfd_link_hash_defined
3724 && h->root.type != bfd_link_hash_defweak)
3725 || htab->srelbss == NULL)
3726 abort ();
252b5132
RH		 3727
3728 rel.r_offset = (h->root.u.def.value
3729 + h->root.u.def.section->output_section->vma
3730 + h->root.u.def.section->output_offset);
3731 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
947216bf
AM		 3732 loc = htab->srelbss->contents;
3733 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 3734 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 3735 }
3736
eac338cf
PB		 3737 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3738 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3739 is relative to the ".got" section. */
252b5132 3740 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
22edb2f1 3741 || (!htab->is_vxworks && h == htab->elf.hgot))
252b5132
RH		 3742 sym->st_shndx = SHN_ABS;
3743
b34976b6 3744 return TRUE;
252b5132
RH		 3745}
3746
38701953
AM		 3747/* Used to decide how to sort relocs in an optimal manner for the
3748 dynamic linker, before writing them out. */
3749
3750static enum elf_reloc_type_class
55fd94b0 3751elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
38701953 3752{
55fd94b0 3753 switch (ELF32_R_TYPE (rela->r_info))
38701953
AM		 3754 {
3755 case R_386_RELATIVE:
3756 return reloc_class_relative;
3757 case R_386_JUMP_SLOT:
3758 return reloc_class_plt;
3759 case R_386_COPY:
3760 return reloc_class_copy;
3761 default:
3762 return reloc_class_normal;
3763 }
3764}
3765
252b5132
RH		 3766/* Finish up the dynamic sections. */
3767
b34976b6 3768static bfd_boolean
55fd94b0
AM		 3769elf_i386_finish_dynamic_sections (bfd *output_bfd,
3770 struct bfd_link_info *info)
252b5132 3771{
6725bdbf 3772 struct elf_i386_link_hash_table *htab;
252b5132 3773 bfd *dynobj;
252b5132
RH		 3774 asection *sdyn;
3775
6725bdbf 3776 htab = elf_i386_hash_table (info);
ebe50bae 3777 dynobj = htab->elf.dynobj;
252b5132
RH		 3778 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3779
ebe50bae 3780 if (htab->elf.dynamic_sections_created)
252b5132 3781 {
252b5132
RH		 3782 Elf32_External_Dyn *dyncon, *dynconend;
3783
ffb2e45b
AM		 3784 if (sdyn == NULL || htab->sgot == NULL)
3785 abort ();
252b5132
RH		 3786
3787 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 3788 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 3789 for (; dyncon < dynconend; dyncon++)
3790 {
3791 Elf_Internal_Dyn dyn;
51b64d56 3792 asection *s;
252b5132
RH		 3793
3794 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3795
3796 switch (dyn.d_tag)
3797 {
3798 default:
0ac8d2ca 3799 continue;
252b5132
RH		 3800
3801 case DT_PLTGOT:
8c37241b
JJ		 3802 s = htab->sgotplt;
3803 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 3804 break;
3805
252b5132 3806 case DT_JMPREL:
6348e046
AM		 3807 s = htab->srelplt;
3808 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 3809 break;
3810
3811 case DT_PLTRELSZ:
6348e046 3812 s = htab->srelplt;
eea6121a 3813 dyn.d_un.d_val = s->size;
252b5132
RH		 3814 break;
3815
3816 case DT_RELSZ:
3817 /* My reading of the SVR4 ABI indicates that the
3818 procedure linkage table relocs (DT_JMPREL) should be
3819 included in the overall relocs (DT_REL). This is
3820 what Solaris does. However, UnixWare can not handle
3821 that case. Therefore, we override the DT_RELSZ entry
6348e046
AM		 3822 here to make it not include the JMPREL relocs. */
3823 s = htab->srelplt;
3824 if (s == NULL)
3825 continue;
eea6121a 3826 dyn.d_un.d_val -= s->size;
6348e046
AM		 3827 break;
3828
3829 case DT_REL:
3830 /* We may not be using the standard ELF linker script.
3831 If .rel.plt is the first .rel section, we adjust
3832 DT_REL to not include it. */
3833 s = htab->srelplt;
3834 if (s == NULL)
3835 continue;
3836 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3837 continue;
eea6121a 3838 dyn.d_un.d_ptr += s->size;
252b5132
RH		 3839 break;
3840 }
0ac8d2ca
AM		 3841
3842 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 3843 }
3844
3845 /* Fill in the first entry in the procedure linkage table. */
eea6121a 3846 if (htab->splt && htab->splt->size > 0)
252b5132
RH		 3847 {
3848 if (info->shared)
eac338cf
PB		 3849 {
3850 memcpy (htab->splt->contents, elf_i386_pic_plt0_entry,
3851 sizeof (elf_i386_pic_plt0_entry));
3852 memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry),
3853 htab->plt0_pad_byte,
3854 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
3855 }
252b5132
RH		 3856 else
3857 {
eac338cf
PB		 3858 memcpy (htab->splt->contents, elf_i386_plt0_entry,
3859 sizeof(elf_i386_plt0_entry));
3860 memset (htab->splt->contents + sizeof (elf_i386_plt0_entry),
3861 htab->plt0_pad_byte,
3862 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
252b5132 3863 bfd_put_32 (output_bfd,
6725bdbf
AM		 3864 (htab->sgotplt->output_section->vma
3865 + htab->sgotplt->output_offset
3866 + 4),
3867 htab->splt->contents + 2);
252b5132 3868 bfd_put_32 (output_bfd,
6725bdbf
AM		 3869 (htab->sgotplt->output_section->vma
3870 + htab->sgotplt->output_offset
3871 + 8),
3872 htab->splt->contents + 8);
eac338cf
PB		 3873
3874 if (htab->is_vxworks)
3875 {
3876 Elf_Internal_Rela rel;
7325306f 3877
eac338cf
PB		 3878 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3879 On IA32 we use REL relocations so the addend goes in
3880 the PLT directly. */
3881 rel.r_offset = (htab->splt->output_section->vma
3882 + htab->splt->output_offset
3883 + 2);
7325306f 3884 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3885 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3886 htab->srelplt2->contents);
3887 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3888 rel.r_offset = (htab->splt->output_section->vma
3889 + htab->splt->output_offset
3890 + 8);
7325306f 3891 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3892 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3893 htab->srelplt2->contents +
3894 sizeof (Elf32_External_Rel));
3895 }
252b5132
RH		 3896 }
3897
3898 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3899 really seem like the right value. */
6725bdbf
AM		 3900 elf_section_data (htab->splt->output_section)
3901 ->this_hdr.sh_entsize = 4;
eac338cf
PB		 3902
3903 /* Correct the .rel.plt.unloaded relocations. */
3904 if (htab->is_vxworks && !info->shared)
3905 {
3906 int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1;
4c9b0de6 3907 unsigned char *p;
eac338cf
PB		 3908
3909 p = htab->srelplt2->contents;
3910 if (info->shared)
3911 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
3912 else
3913 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
3914
3915 for (; num_plts; num_plts--)
3916 {
3917 Elf_Internal_Rela rel;
3918 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 3919 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3920 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3921 p += sizeof (Elf32_External_Rel);
3922
3923 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 3924 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf
PB		 3925 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3926 p += sizeof (Elf32_External_Rel);
3927 }
3928 }
252b5132
RH		 3929 }
3930 }
3931
12d0ee4a 3932 if (htab->sgotplt)
252b5132 3933 {
12d0ee4a 3934 /* Fill in the first three entries in the global offset table. */
eea6121a 3935 if (htab->sgotplt->size > 0)
12d0ee4a
AM		 3936 {
3937 bfd_put_32 (output_bfd,
55fd94b0 3938 (sdyn == NULL ? 0
12d0ee4a
AM		 3939 : sdyn->output_section->vma + sdyn->output_offset),
3940 htab->sgotplt->contents);
55fd94b0
AM		 3941 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3942 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
12d0ee4a 3943 }
252b5132 3944
12d0ee4a
AM		 3945 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3946 }
8c37241b 3947
eea6121a 3948 if (htab->sgot && htab->sgot->size > 0)
8c37241b
JJ		 3949 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3950
b34976b6 3951 return TRUE;
252b5132
RH		 3952}
3953
4c45e5c9
JJ		 3954/* Return address for Ith PLT stub in section PLT, for relocation REL
3955 or (bfd_vma) -1 if it should not be included. */
3956
3957static bfd_vma
3958elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
3959 const arelent *rel ATTRIBUTE_UNUSED)
3960{
3961 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
3962}
3963
fdc90cb4
JJ		 3964/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
3965
3966static bfd_boolean
3967elf_i386_hash_symbol (struct elf_link_hash_entry *h)
3968{
3969 if (h->plt.offset != (bfd_vma) -1
3970 && !h->def_regular
3971 && !h->pointer_equality_needed)
3972 return FALSE;
3973
3974 return _bfd_elf_hash_symbol (h);
3975}
4c45e5c9 3976
252b5132
RH		 3977#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3978#define TARGET_LITTLE_NAME "elf32-i386"
3979#define ELF_ARCH bfd_arch_i386
3980#define ELF_MACHINE_CODE EM_386
3981#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 3982
3983#define elf_backend_can_gc_sections 1
51b64d56 3984#define elf_backend_can_refcount 1
252b5132
RH		 3985#define elf_backend_want_got_plt 1
3986#define elf_backend_plt_readonly 1
3987#define elf_backend_want_plt_sym 0
3988#define elf_backend_got_header_size 12
252b5132 3989
8c29f035
AM		 3990/* Support RELA for objdump of prelink objects. */
3991#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 3992#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3993
13ae64f3 3994#define bfd_elf32_mkobject elf_i386_mkobject
13ae64f3 3995
dd5724d5
AM		 3996#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3997#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3998#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
157090f7 3999#define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
dd5724d5
AM		 4000
4001#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4002#define elf_backend_check_relocs elf_i386_check_relocs
0ac8d2ca 4003#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6725bdbf 4004#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
0ac8d2ca 4005#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 4006#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4007#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4008#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4009#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
c5fccbec
DJ		 4010#define elf_backend_grok_prstatus elf_i386_grok_prstatus
4011#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 4012#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 4013#define elf_backend_relocate_section elf_i386_relocate_section
4014#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
67a4f2b7 4015#define elf_backend_always_size_sections elf_i386_always_size_sections
74541ad4
AM		 4016#define elf_backend_omit_section_dynsym \
4017 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4c45e5c9 4018#define elf_backend_plt_sym_val elf_i386_plt_sym_val
fdc90cb4 4019#define elf_backend_hash_symbol elf_i386_hash_symbol
dd5724d5 4020
252b5132 4021#include "elf32-target.h"
2bc3c89a
AM		 4022
4023/* FreeBSD support. */
4024
4025#undef TARGET_LITTLE_SYM
4026#define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4027#undef TARGET_LITTLE_NAME
4028#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
d1036acb
L		 4029#undef ELF_OSABI
4030#define ELF_OSABI ELFOSABI_FREEBSD
2bc3c89a
AM		 4031
4032/* The kernel recognizes executables as valid only if they carry a
4033 "FreeBSD" label in the ELF header. So we put this label on all
4034 executables and (for simplicity) also all other object files. */
4035
2bc3c89a 4036static void
55fd94b0
AM		 4037elf_i386_post_process_headers (bfd *abfd,
4038 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2bc3c89a
AM		 4039{
4040 Elf_Internal_Ehdr *i_ehdrp;
4041
4042 i_ehdrp = elf_elfheader (abfd);
4043
4044 /* Put an ABI label supported by FreeBSD >= 4.1. */
d1036acb 4045 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
2bc3c89a
AM		 4046#ifdef OLD_FREEBSD_ABI_LABEL
4047 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4048 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
caf47ea6 4049#endif
2bc3c89a
AM		 4050}
4051
4052#undef elf_backend_post_process_headers
571fe01f
NC		 4053#define elf_backend_post_process_headers elf_i386_post_process_headers
4054#undef elf32_bed
4055#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a
AM		 4056
4057#include "elf32-target.h"
eac338cf
PB		 4058
4059/* VxWorks support. */
4060
4061#undef TARGET_LITTLE_SYM
4062#define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4063#undef TARGET_LITTLE_NAME
4064#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
d1036acb 4065#undef ELF_OSABI
eac338cf
PB		 4066
4067/* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4068
4069static struct bfd_link_hash_table *
4070elf_i386_vxworks_link_hash_table_create (bfd *abfd)
4071{
4072 struct bfd_link_hash_table *ret;
4073 struct elf_i386_link_hash_table *htab;
4074
4075 ret = elf_i386_link_hash_table_create (abfd);
4076 if (ret)
4077 {
4078 htab = (struct elf_i386_link_hash_table *) ret;
4079 htab->is_vxworks = 1;
4080 htab->plt0_pad_byte = 0x90;
4081 }
4082
4083 return ret;
4084}
4085
4086
eac338cf
PB		 4087#undef elf_backend_post_process_headers
4088#undef bfd_elf32_bfd_link_hash_table_create
4089#define bfd_elf32_bfd_link_hash_table_create \
4090 elf_i386_vxworks_link_hash_table_create
4091#undef elf_backend_add_symbol_hook
4092#define elf_backend_add_symbol_hook \
4093 elf_vxworks_add_symbol_hook
4094#undef elf_backend_link_output_symbol_hook
4095#define elf_backend_link_output_symbol_hook \
9c72ff84 4096 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 4097#undef elf_backend_emit_relocs
4098#define elf_backend_emit_relocs elf_vxworks_emit_relocs
4099#undef elf_backend_final_write_processing
4100#define elf_backend_final_write_processing \
4101 elf_vxworks_final_write_processing
4102
4103/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4104 define it. */
4105#undef elf_backend_want_plt_sym
4106#define elf_backend_want_plt_sym 1
4107
4108#undef elf32_bed
4109#define elf32_bed elf32_i386_vxworks_bed
4110
4111#include "elf32-target.h"
GDB Binutils - Deliverables
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