projects / deliverable / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
(bfd_section_from_shdr): Add sanity check when parsing dynamic sections.
[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,
3eb128b2 3 2003, 2004, 2005 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
9 the Free Software Foundation; either version 2 of the License, or
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
3e110533 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
252b5132
RH		 20
21#include "bfd.h"
22#include "sysdep.h"
23#include "bfdlink.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
eac338cf 26#include "elf-vxworks.h"
252b5132 27
55fd94b0
AM		 28/* 386 uses REL relocations instead of RELA. */
29#define USE_REL 1
252b5132
RH		 30
31#include "elf/i386.h"
32
33static reloc_howto_type elf_howto_table[]=
34{
b34976b6 35 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
1b452ec6 36 bfd_elf_generic_reloc, "R_386_NONE",
b34976b6
AM		 37 TRUE, 0x00000000, 0x00000000, FALSE),
38 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 39 bfd_elf_generic_reloc, "R_386_32",
b34976b6
AM		 40 TRUE, 0xffffffff, 0xffffffff, FALSE),
41 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 42 bfd_elf_generic_reloc, "R_386_PC32",
b34976b6
AM		 43 TRUE, 0xffffffff, 0xffffffff, TRUE),
44 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 45 bfd_elf_generic_reloc, "R_386_GOT32",
b34976b6
AM		 46 TRUE, 0xffffffff, 0xffffffff, FALSE),
47 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 48 bfd_elf_generic_reloc, "R_386_PLT32",
b34976b6
AM		 49 TRUE, 0xffffffff, 0xffffffff, TRUE),
50 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 51 bfd_elf_generic_reloc, "R_386_COPY",
b34976b6
AM		 52 TRUE, 0xffffffff, 0xffffffff, FALSE),
53 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 54 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
b34976b6
AM		 55 TRUE, 0xffffffff, 0xffffffff, FALSE),
56 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 57 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
b34976b6
AM		 58 TRUE, 0xffffffff, 0xffffffff, FALSE),
59 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 60 bfd_elf_generic_reloc, "R_386_RELATIVE",
b34976b6
AM		 61 TRUE, 0xffffffff, 0xffffffff, FALSE),
62 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 63 bfd_elf_generic_reloc, "R_386_GOTOFF",
b34976b6
AM		 64 TRUE, 0xffffffff, 0xffffffff, FALSE),
65 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 66 bfd_elf_generic_reloc, "R_386_GOTPC",
b34976b6 67 TRUE, 0xffffffff, 0xffffffff, TRUE),
1b452ec6 68
dc47f327
AM		 69 /* We have a gap in the reloc numbers here.
70 R_386_standard counts the number up to this point, and
71 R_386_ext_offset is the value to subtract from a reloc type of
72 R_386_16 thru R_386_PC8 to form an index into this table. */
55fd94b0
AM		 73#define R_386_standard (R_386_GOTPC + 1)
74#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
1b452ec6 75
37e55690 76 /* These relocs are a GNU extension. */
b34976b6 77 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 78 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
b34976b6
AM		 79 TRUE, 0xffffffff, 0xffffffff, FALSE),
80 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 81 bfd_elf_generic_reloc, "R_386_TLS_IE",
b34976b6
AM		 82 TRUE, 0xffffffff, 0xffffffff, FALSE),
83 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 84 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
b34976b6
AM		 85 TRUE, 0xffffffff, 0xffffffff, FALSE),
86 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 87 bfd_elf_generic_reloc, "R_386_TLS_LE",
b34976b6
AM		 88 TRUE, 0xffffffff, 0xffffffff, FALSE),
89 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 90 bfd_elf_generic_reloc, "R_386_TLS_GD",
b34976b6
AM		 91 TRUE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 93 bfd_elf_generic_reloc, "R_386_TLS_LDM",
b34976b6
AM		 94 TRUE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
1b452ec6 96 bfd_elf_generic_reloc, "R_386_16",
b34976b6
AM		 97 TRUE, 0xffff, 0xffff, FALSE),
98 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
1b452ec6 99 bfd_elf_generic_reloc, "R_386_PC16",
b34976b6
AM		 100 TRUE, 0xffff, 0xffff, TRUE),
101 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
1b452ec6 102 bfd_elf_generic_reloc, "R_386_8",
b34976b6
AM		 103 TRUE, 0xff, 0xff, FALSE),
104 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
1b452ec6 105 bfd_elf_generic_reloc, "R_386_PC8",
b34976b6 106 TRUE, 0xff, 0xff, TRUE),
dc47f327 107
55fd94b0
AM		 108#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
109#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
13ae64f3 110 /* These are common with Solaris TLS implementation. */
b34976b6 111 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 112 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
b34976b6
AM		 113 TRUE, 0xffffffff, 0xffffffff, FALSE),
114 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 115 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
b34976b6
AM		 116 TRUE, 0xffffffff, 0xffffffff, FALSE),
117 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 118 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
b34976b6
AM		 119 TRUE, 0xffffffff, 0xffffffff, FALSE),
120 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 121 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
b34976b6
AM		 122 TRUE, 0xffffffff, 0xffffffff, FALSE),
123 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 124 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
b34976b6
AM		 125 TRUE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 127 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
b34976b6 128 TRUE, 0xffffffff, 0xffffffff, FALSE),
13ae64f3
JJ		 129
130 /* Another gap. */
55fd94b0
AM		 131#define R_386_tls (R_386_TLS_TPOFF32 + 1 - R_386_tls_offset)
132#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
252b5132
RH		 133
134/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH		 135 HOWTO (R_386_GNU_VTINHERIT, /* type */
136 0, /* rightshift */
137 2, /* size (0 = byte, 1 = short, 2 = long) */
138 0, /* bitsize */
b34976b6 139 FALSE, /* pc_relative */
252b5132
RH		 140 0, /* bitpos */
141 complain_overflow_dont, /* complain_on_overflow */
142 NULL, /* special_function */
143 "R_386_GNU_VTINHERIT", /* name */
b34976b6 144 FALSE, /* partial_inplace */
252b5132
RH		 145 0, /* src_mask */
146 0, /* dst_mask */
b34976b6 147 FALSE), /* pcrel_offset */
252b5132
RH		 148
149/* GNU extension to record C++ vtable member usage. */
252b5132
RH		 150 HOWTO (R_386_GNU_VTENTRY, /* type */
151 0, /* rightshift */
152 2, /* size (0 = byte, 1 = short, 2 = long) */
153 0, /* bitsize */
b34976b6 154 FALSE, /* pc_relative */
252b5132
RH		 155 0, /* bitpos */
156 complain_overflow_dont, /* complain_on_overflow */
157 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
158 "R_386_GNU_VTENTRY", /* name */
b34976b6 159 FALSE, /* partial_inplace */
252b5132
RH		 160 0, /* src_mask */
161 0, /* dst_mask */
b34976b6 162 FALSE) /* pcrel_offset */
dc47f327 163
55fd94b0 164#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
dc47f327
AM		 165
166};
167
252b5132 168#ifdef DEBUG_GEN_RELOC
55fd94b0
AM		 169#define TRACE(str) \
170 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH		 171#else
172#define TRACE(str)
173#endif
174
175static reloc_howto_type *
55fd94b0
AM		 176elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
177 bfd_reloc_code_real_type code)
252b5132
RH		 178{
179 switch (code)
180 {
181 case BFD_RELOC_NONE:
182 TRACE ("BFD_RELOC_NONE");
55fd94b0 183 return &elf_howto_table[R_386_NONE];
252b5132
RH		 184
185 case BFD_RELOC_32:
186 TRACE ("BFD_RELOC_32");
55fd94b0 187 return &elf_howto_table[R_386_32];
252b5132
RH		 188
189 case BFD_RELOC_CTOR:
190 TRACE ("BFD_RELOC_CTOR");
55fd94b0 191 return &elf_howto_table[R_386_32];
252b5132
RH		 192
193 case BFD_RELOC_32_PCREL:
194 TRACE ("BFD_RELOC_PC32");
55fd94b0 195 return &elf_howto_table[R_386_PC32];
252b5132
RH		 196
197 case BFD_RELOC_386_GOT32:
198 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 199 return &elf_howto_table[R_386_GOT32];
252b5132
RH		 200
201 case BFD_RELOC_386_PLT32:
202 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 203 return &elf_howto_table[R_386_PLT32];
252b5132
RH		 204
205 case BFD_RELOC_386_COPY:
206 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 207 return &elf_howto_table[R_386_COPY];
252b5132
RH		 208
209 case BFD_RELOC_386_GLOB_DAT:
210 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 211 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH		 212
213 case BFD_RELOC_386_JUMP_SLOT:
214 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 215 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH		 216
217 case BFD_RELOC_386_RELATIVE:
218 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 219 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH		 220
221 case BFD_RELOC_386_GOTOFF:
222 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 223 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH		 224
225 case BFD_RELOC_386_GOTPC:
226 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 227 return &elf_howto_table[R_386_GOTPC];
252b5132 228
37e55690
JJ		 229 /* These relocs are a GNU extension. */
230 case BFD_RELOC_386_TLS_TPOFF:
231 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 232 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ		 233
234 case BFD_RELOC_386_TLS_IE:
235 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 236 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ		 237
238 case BFD_RELOC_386_TLS_GOTIE:
239 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 240 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 241
13ae64f3
JJ		 242 case BFD_RELOC_386_TLS_LE:
243 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 244 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ		 245
246 case BFD_RELOC_386_TLS_GD:
247 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 248 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ		 249
250 case BFD_RELOC_386_TLS_LDM:
251 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 252 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 253
252b5132
RH		 254 case BFD_RELOC_16:
255 TRACE ("BFD_RELOC_16");
55fd94b0 256 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH		 257
258 case BFD_RELOC_16_PCREL:
259 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 260 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH		 261
262 case BFD_RELOC_8:
263 TRACE ("BFD_RELOC_8");
55fd94b0 264 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH		 265
266 case BFD_RELOC_8_PCREL:
267 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 268 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 269
13ae64f3
JJ		 270 /* Common with Sun TLS implementation. */
271 case BFD_RELOC_386_TLS_LDO_32:
272 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 273 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ		 274
275 case BFD_RELOC_386_TLS_IE_32:
276 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 277 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ		 278
279 case BFD_RELOC_386_TLS_LE_32:
280 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 281 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ		 282
283 case BFD_RELOC_386_TLS_DTPMOD32:
284 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 285 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ		 286
287 case BFD_RELOC_386_TLS_DTPOFF32:
288 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 289 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ		 290
291 case BFD_RELOC_386_TLS_TPOFF32:
292 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 293 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 294
252b5132
RH		 295 case BFD_RELOC_VTABLE_INHERIT:
296 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 297 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH		 298
299 case BFD_RELOC_VTABLE_ENTRY:
300 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 301 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH		 302
303 default:
304 break;
305 }
306
307 TRACE ("Unknown");
308 return 0;
309}
310
252b5132 311static void
55fd94b0
AM		 312elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
313 arelent *cache_ptr,
314 Elf_Internal_Rela *dst)
252b5132 315{
dc47f327
AM		 316 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
317 unsigned int indx;
318
319 if ((indx = r_type) >= R_386_standard
320 && ((indx = r_type - R_386_ext_offset) - R_386_standard
321 >= R_386_ext - R_386_standard)
13ae64f3
JJ		 322 && ((indx = r_type - R_386_tls_offset) - R_386_ext
323 >= R_386_tls - R_386_ext)
324 && ((indx = r_type - R_386_vt_offset) - R_386_tls
325 >= R_386_vt - R_386_tls))
252b5132 326 {
d003868e
AM		 327 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
328 abfd, (int) r_type);
55fd94b0 329 indx = R_386_NONE;
252b5132 330 }
dc47f327 331 cache_ptr->howto = &elf_howto_table[indx];
252b5132
RH		 332}
333
334/* Return whether a symbol name implies a local label. The UnixWare
335 2.1 cc generates temporary symbols that start with .X, so we
336 recognize them here. FIXME: do other SVR4 compilers also use .X?.
337 If so, we should move the .X recognition into
338 _bfd_elf_is_local_label_name. */
339
b34976b6 340static bfd_boolean
55fd94b0 341elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH		 342{
343 if (name[0] == '.' && name[1] == 'X')
b34976b6 344 return TRUE;
252b5132
RH		 345
346 return _bfd_elf_is_local_label_name (abfd, name);
347}
348\f
38701953 349/* Support for core dump NOTE sections. */
61adc1a4 350
b34976b6 351static bfd_boolean
55fd94b0 352elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM		 353{
354 int offset;
eea6121a 355 size_t size;
38701953 356
61adc1a4 357 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 358 {
61adc1a4
NC		 359 int pr_version = bfd_get_32 (abfd, note->descdata);
360
361 if (pr_version != 1)
362 return FALSE;
363
364 /* pr_cursig */
365 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
366
367 /* pr_pid */
368 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
369
370 /* pr_reg */
371 offset = 28;
eea6121a 372 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC		 373 }
374 else
375 {
376 switch (note->descsz)
377 {
378 default:
379 return FALSE;
38701953 380
61adc1a4
NC		 381 case 144: /* Linux/i386 */
382 /* pr_cursig */
383 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 384
61adc1a4
NC		 385 /* pr_pid */
386 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
38701953 387
61adc1a4
NC		 388 /* pr_reg */
389 offset = 72;
eea6121a 390 size = 68;
38701953 391
61adc1a4
NC		 392 break;
393 }
38701953
AM		 394 }
395
396 /* Make a ".reg/999" section. */
397 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 398 size, note->descpos + offset);
38701953
AM		 399}
400
b34976b6 401static bfd_boolean
55fd94b0 402elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 403{
61adc1a4 404 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 405 {
61adc1a4
NC		 406 int pr_version = bfd_get_32 (abfd, note->descdata);
407
408 if (pr_version != 1)
b34976b6 409 return FALSE;
38701953 410
61adc1a4
NC		 411 elf_tdata (abfd)->core_program
412 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
413 elf_tdata (abfd)->core_command
414 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
415 }
416 else
417 {
418 switch (note->descsz)
419 {
420 default:
421 return FALSE;
422
423 case 124: /* Linux/i386 elf_prpsinfo. */
424 elf_tdata (abfd)->core_program
425 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
426 elf_tdata (abfd)->core_command
427 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
428 }
38701953
AM		 429 }
430
431 /* Note that for some reason, a spurious space is tacked
432 onto the end of the args in some (at least one anyway)
433 implementations, so strip it off if it exists. */
38701953
AM		 434 {
435 char *command = elf_tdata (abfd)->core_command;
436 int n = strlen (command);
437
438 if (0 < n && command[n - 1] == ' ')
439 command[n - 1] = '\0';
440 }
441
b34976b6 442 return TRUE;
38701953
AM		 443}
444\f
445/* Functions for the i386 ELF linker.
446
447 In order to gain some understanding of code in this file without
448 knowing all the intricate details of the linker, note the
449 following:
450
451 Functions named elf_i386_* are called by external routines, other
452 functions are only called locally. elf_i386_* functions appear
453 in this file more or less in the order in which they are called
454 from external routines. eg. elf_i386_check_relocs is called
455 early in the link process, elf_i386_finish_dynamic_sections is
456 one of the last functions. */
457
252b5132
RH		 458
459/* The name of the dynamic interpreter. This is put in the .interp
460 section. */
461
462#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
463
a23b6845
AM		 464/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
465 copying dynamic variables from a shared lib into an app's dynbss
466 section, and instead use a dynamic relocation to point into the
467 shared lib. */
468#define ELIMINATE_COPY_RELOCS 1
469
252b5132
RH		 470/* The size in bytes of an entry in the procedure linkage table. */
471
472#define PLT_ENTRY_SIZE 16
473
474/* The first entry in an absolute procedure linkage table looks like
eac338cf
PB		 475 this. See the SVR4 ABI i386 supplement to see how this works.
476 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 477
eac338cf 478static const bfd_byte elf_i386_plt0_entry[12] =
252b5132
RH		 479{
480 0xff, 0x35, /* pushl contents of address */
481 0, 0, 0, 0, /* replaced with address of .got + 4. */
482 0xff, 0x25, /* jmp indirect */
eac338cf 483 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 484};
485
486/* Subsequent entries in an absolute procedure linkage table look like
487 this. */
488
489static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
490{
491 0xff, 0x25, /* jmp indirect */
492 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
493 0x68, /* pushl immediate */
494 0, 0, 0, 0, /* replaced with offset into relocation table. */
495 0xe9, /* jmp relative */
496 0, 0, 0, 0 /* replaced with offset to start of .plt. */
497};
498
eac338cf
PB		 499/* The first entry in a PIC procedure linkage table look like this.
500 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 501
eac338cf 502static const bfd_byte elf_i386_pic_plt0_entry[12] =
252b5132
RH		 503{
504 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 505 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 506};
507
508/* Subsequent entries in a PIC procedure linkage table look like this. */
509
510static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
511{
512 0xff, 0xa3, /* jmp *offset(%ebx) */
513 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
514 0x68, /* pushl immediate */
515 0, 0, 0, 0, /* replaced with offset into relocation table. */
516 0xe9, /* jmp relative */
517 0, 0, 0, 0 /* replaced with offset to start of .plt. */
518};
519
eac338cf
PB		 520/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
521 for the PLTResolve stub and then for each PLT entry. */
522#define PLTRESOLVE_RELOCS_SHLIB 0
523#define PLTRESOLVE_RELOCS 2
524#define PLT_NON_JUMP_SLOT_RELOCS 2
525
252b5132 526/* The i386 linker needs to keep track of the number of relocs that it
ffb2e45b
AM		 527 decides to copy as dynamic relocs in check_relocs for each symbol.
528 This is so that it can later discard them if they are found to be
529 unnecessary. We store the information in a field extending the
530 regular ELF linker hash table. */
252b5132 531
ffb2e45b 532struct elf_i386_dyn_relocs
252b5132 533{
ffb2e45b 534 struct elf_i386_dyn_relocs *next;
0c715baa
AM		 535
536 /* The input section of the reloc. */
537 asection *sec;
538
539 /* Total number of relocs copied for the input section. */
252b5132 540 bfd_size_type count;
0c715baa
AM		 541
542 /* Number of pc-relative relocs copied for the input section. */
543 bfd_size_type pc_count;
252b5132
RH		 544};
545
546/* i386 ELF linker hash entry. */
547
548struct elf_i386_link_hash_entry
549{
ebe50bae 550 struct elf_link_hash_entry elf;
252b5132 551
0c715baa 552 /* Track dynamic relocs copied for this symbol. */
ffb2e45b 553 struct elf_i386_dyn_relocs *dyn_relocs;
13ae64f3 554
37e55690
JJ		 555#define GOT_UNKNOWN 0
556#define GOT_NORMAL 1
557#define GOT_TLS_GD 2
558#define GOT_TLS_IE 4
559#define GOT_TLS_IE_POS 5
560#define GOT_TLS_IE_NEG 6
561#define GOT_TLS_IE_BOTH 7
562 unsigned char tls_type;
13ae64f3
JJ		 563};
564
565#define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
566
567struct elf_i386_obj_tdata
568{
569 struct elf_obj_tdata root;
570
571 /* tls_type for each local got entry. */
572 char *local_got_tls_type;
252b5132
RH		 573};
574
13ae64f3
JJ		 575#define elf_i386_tdata(abfd) \
576 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
577
578#define elf_i386_local_got_tls_type(abfd) \
579 (elf_i386_tdata (abfd)->local_got_tls_type)
580
b34976b6 581static bfd_boolean
55fd94b0 582elf_i386_mkobject (bfd *abfd)
13ae64f3
JJ		 583{
584 bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
585 abfd->tdata.any = bfd_zalloc (abfd, amt);
586 if (abfd->tdata.any == NULL)
b34976b6
AM		 587 return FALSE;
588 return TRUE;
13ae64f3 589}
cedb70c5 590
252b5132
RH		 591/* i386 ELF linker hash table. */
592
593struct elf_i386_link_hash_table
594{
ebe50bae 595 struct elf_link_hash_table elf;
252b5132 596
6725bdbf
AM		 597 /* Short-cuts to get to dynamic linker sections. */
598 asection *sgot;
599 asection *sgotplt;
600 asection *srelgot;
601 asection *splt;
602 asection *srelplt;
603 asection *sdynbss;
604 asection *srelbss;
eac338cf
PB		 605
606 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
607 asection *srelplt2;
608
609 /* Short-cuts to frequently used symbols for VxWorks targets. */
610 struct elf_link_hash_entry *hgot, *hplt;
611
612 /* True if the target system is VxWorks. */
613 int is_vxworks;
ec338859 614
eac338cf
PB		 615 /* Value used to fill the last word of the first plt entry. */
616 bfd_byte plt0_pad_byte;
617
13ae64f3
JJ		 618 union {
619 bfd_signed_vma refcount;
620 bfd_vma offset;
621 } tls_ldm_got;
622
ec338859
AM		 623 /* Small local sym to section mapping cache. */
624 struct sym_sec_cache sym_sec;
6725bdbf 625};
252b5132
RH		 626
627/* Get the i386 ELF linker hash table from a link_info structure. */
628
629#define elf_i386_hash_table(p) \
630 ((struct elf_i386_link_hash_table *) ((p)->hash))
631
632/* Create an entry in an i386 ELF linker hash table. */
633
634static struct bfd_hash_entry *
55fd94b0
AM		 635link_hash_newfunc (struct bfd_hash_entry *entry,
636 struct bfd_hash_table *table,
637 const char *string)
252b5132 638{
252b5132
RH		 639 /* Allocate the structure if it has not already been allocated by a
640 subclass. */
ebe50bae
AM		 641 if (entry == NULL)
642 {
643 entry = bfd_hash_allocate (table,
644 sizeof (struct elf_i386_link_hash_entry));
645 if (entry == NULL)
646 return entry;
647 }
252b5132
RH		 648
649 /* Call the allocation method of the superclass. */
ebe50bae
AM		 650 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
651 if (entry != NULL)
252b5132 652 {
ebe50bae
AM		 653 struct elf_i386_link_hash_entry *eh;
654
655 eh = (struct elf_i386_link_hash_entry *) entry;
656 eh->dyn_relocs = NULL;
13ae64f3 657 eh->tls_type = GOT_UNKNOWN;
252b5132
RH		 658 }
659
ebe50bae 660 return entry;
252b5132
RH		 661}
662
663/* Create an i386 ELF linker hash table. */
664
665static struct bfd_link_hash_table *
55fd94b0 666elf_i386_link_hash_table_create (bfd *abfd)
252b5132
RH		 667{
668 struct elf_i386_link_hash_table *ret;
dc810e39 669 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
252b5132 670
55fd94b0 671 ret = bfd_malloc (amt);
ebe50bae 672 if (ret == NULL)
252b5132
RH		 673 return NULL;
674
ebe50bae 675 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
252b5132 676 {
e2d34d7d 677 free (ret);
252b5132
RH		 678 return NULL;
679 }
680
6725bdbf
AM		 681 ret->sgot = NULL;
682 ret->sgotplt = NULL;
683 ret->srelgot = NULL;
684 ret->splt = NULL;
685 ret->srelplt = NULL;
686 ret->sdynbss = NULL;
687 ret->srelbss = NULL;
7a624474 688 ret->tls_ldm_got.refcount = 0;
ec338859 689 ret->sym_sec.abfd = NULL;
eac338cf
PB		 690 ret->is_vxworks = 0;
691 ret->srelplt2 = NULL;
692 ret->hgot = NULL;
693 ret->hplt = NULL;
694 ret->plt0_pad_byte = 0;
6725bdbf 695
ebe50bae 696 return &ret->elf.root;
252b5132
RH		 697}
698
6725bdbf
AM		 699/* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
700 shortcuts to them in our hash table. */
701
b34976b6 702static bfd_boolean
55fd94b0 703create_got_section (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM		 704{
705 struct elf_i386_link_hash_table *htab;
706
707 if (! _bfd_elf_create_got_section (dynobj, info))
b34976b6 708 return FALSE;
6725bdbf
AM		 709
710 htab = elf_i386_hash_table (info);
711 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
712 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
713 if (!htab->sgot || !htab->sgotplt)
714 abort ();
715
3496cb2a
L		 716 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
717 (SEC_ALLOC | SEC_LOAD
718 | SEC_HAS_CONTENTS
719 | SEC_IN_MEMORY
720 | SEC_LINKER_CREATED
721 | SEC_READONLY));
6725bdbf 722 if (htab->srelgot == NULL
6725bdbf 723 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
b34976b6
AM		 724 return FALSE;
725 return TRUE;
6725bdbf
AM		 726}
727
728/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
729 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
730 hash table. */
731
b34976b6 732static bfd_boolean
55fd94b0 733elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM		 734{
735 struct elf_i386_link_hash_table *htab;
eac338cf
PB		 736 asection * s;
737 int flags;
738 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
6725bdbf
AM		 739
740 htab = elf_i386_hash_table (info);
741 if (!htab->sgot && !create_got_section (dynobj, info))
b34976b6 742 return FALSE;
6725bdbf
AM		 743
744 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 745 return FALSE;
6725bdbf
AM		 746
747 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
748 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
749 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
750 if (!info->shared)
751 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
752
753 if (!htab->splt || !htab->srelplt || !htab->sdynbss
754 || (!info->shared && !htab->srelbss))
755 abort ();
756
eac338cf
PB		 757 if (htab->is_vxworks && !info->shared)
758 {
759 s = bfd_make_section (dynobj, ".rel.plt.unloaded");
760 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY
761 | SEC_LINKER_CREATED);
762 if (s == NULL
763 || ! bfd_set_section_flags (dynobj, s, flags)
764 || ! bfd_set_section_alignment (dynobj, s, bed->s->log_file_align))
765 return FALSE;
766 htab->srelplt2 = s;
767 }
768
b34976b6 769 return TRUE;
6725bdbf
AM		 770}
771
ebe50bae
AM		 772/* Copy the extra info we tack onto an elf_link_hash_entry. */
773
51b64d56 774static void
9c5bfbb7 775elf_i386_copy_indirect_symbol (const struct elf_backend_data *bed,
55fd94b0
AM		 776 struct elf_link_hash_entry *dir,
777 struct elf_link_hash_entry *ind)
ebe50bae
AM		 778{
779 struct elf_i386_link_hash_entry *edir, *eind;
780
781 edir = (struct elf_i386_link_hash_entry *) dir;
782 eind = (struct elf_i386_link_hash_entry *) ind;
783
bbd7ec4a 784 if (eind->dyn_relocs != NULL)
ebe50bae 785 {
bbd7ec4a
AM		 786 if (edir->dyn_relocs != NULL)
787 {
788 struct elf_i386_dyn_relocs **pp;
789 struct elf_i386_dyn_relocs *p;
790
1e370bd2 791 if (ind->root.type == bfd_link_hash_indirect)
bbd7ec4a
AM		 792 abort ();
793
794 /* Add reloc counts against the weak sym to the strong sym
795 list. Merge any entries against the same section. */
796 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
797 {
798 struct elf_i386_dyn_relocs *q;
799
800 for (q = edir->dyn_relocs; q != NULL; q = q->next)
801 if (q->sec == p->sec)
802 {
803 q->pc_count += p->pc_count;
804 q->count += p->count;
805 *pp = p->next;
806 break;
807 }
808 if (q == NULL)
809 pp = &p->next;
810 }
811 *pp = edir->dyn_relocs;
812 }
813
ebe50bae
AM		 814 edir->dyn_relocs = eind->dyn_relocs;
815 eind->dyn_relocs = NULL;
816 }
ebe50bae 817
cd67d266
JJ		 818 if (ind->root.type == bfd_link_hash_indirect
819 && dir->got.refcount <= 0)
820 {
821 edir->tls_type = eind->tls_type;
822 eind->tls_type = GOT_UNKNOWN;
823 }
81848ca0
AM		 824
825 if (ELIMINATE_COPY_RELOCS
826 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 827 && dir->dynamic_adjusted)
828 {
829 /* If called to transfer flags for a weakdef during processing
830 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
831 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
832 dir->ref_dynamic |= ind->ref_dynamic;
833 dir->ref_regular |= ind->ref_regular;
834 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
835 dir->needs_plt |= ind->needs_plt;
836 dir->pointer_equality_needed |= ind->pointer_equality_needed;
837 }
81848ca0
AM		 838 else
839 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
ebe50bae
AM		 840}
841
13ae64f3 842static int
55fd94b0 843elf_i386_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
13ae64f3
JJ		 844{
845 if (info->shared)
846 return r_type;
847
848 switch (r_type)
849 {
850 case R_386_TLS_GD:
851 case R_386_TLS_IE_32:
852 if (is_local)
853 return R_386_TLS_LE_32;
854 return R_386_TLS_IE_32;
37e55690
JJ		 855 case R_386_TLS_IE:
856 case R_386_TLS_GOTIE:
857 if (is_local)
858 return R_386_TLS_LE_32;
859 return r_type;
13ae64f3
JJ		 860 case R_386_TLS_LDM:
861 return R_386_TLS_LE_32;
862 }
863
864 return r_type;
865}
866
252b5132 867/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 868 calculate needed space in the global offset table, procedure linkage
869 table, and dynamic reloc sections. */
252b5132 870
b34976b6 871static bfd_boolean
55fd94b0
AM		 872elf_i386_check_relocs (bfd *abfd,
873 struct bfd_link_info *info,
874 asection *sec,
875 const Elf_Internal_Rela *relocs)
252b5132 876{
6725bdbf 877 struct elf_i386_link_hash_table *htab;
252b5132
RH		 878 Elf_Internal_Shdr *symtab_hdr;
879 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 880 const Elf_Internal_Rela *rel;
881 const Elf_Internal_Rela *rel_end;
252b5132
RH		 882 asection *sreloc;
883
1049f94e 884 if (info->relocatable)
b34976b6 885 return TRUE;
252b5132 886
6725bdbf 887 htab = elf_i386_hash_table (info);
252b5132
RH		 888 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
889 sym_hashes = elf_sym_hashes (abfd);
252b5132 890
252b5132
RH		 891 sreloc = NULL;
892
893 rel_end = relocs + sec->reloc_count;
894 for (rel = relocs; rel < rel_end; rel++)
895 {
13ae64f3 896 unsigned int r_type;
252b5132
RH		 897 unsigned long r_symndx;
898 struct elf_link_hash_entry *h;
899
900 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 901 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 902
d9bc7a44 903 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 904 {
d003868e
AM		 905 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
906 abfd,
8f615d07 907 r_symndx);
b34976b6 908 return FALSE;
f5f31454
L		 909 }
910
252b5132
RH		 911 if (r_symndx < symtab_hdr->sh_info)
912 h = NULL;
913 else
914 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
915
13ae64f3
JJ		 916 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
917
918 switch (r_type)
252b5132 919 {
37e55690
JJ		 920 case R_386_TLS_LDM:
921 htab->tls_ldm_got.refcount += 1;
922 goto create_got;
923
924 case R_386_PLT32:
925 /* This symbol requires a procedure linkage table entry. We
926 actually build the entry in adjust_dynamic_symbol,
927 because this might be a case of linking PIC code which is
928 never referenced by a dynamic object, in which case we
929 don't need to generate a procedure linkage table entry
930 after all. */
931
932 /* If this is a local symbol, we resolve it directly without
933 creating a procedure linkage table entry. */
934 if (h == NULL)
935 continue;
936
f5385ebf 937 h->needs_plt = 1;
37e55690
JJ		 938 h->plt.refcount += 1;
939 break;
940
13ae64f3 941 case R_386_TLS_IE_32:
37e55690
JJ		 942 case R_386_TLS_IE:
943 case R_386_TLS_GOTIE:
13ae64f3
JJ		 944 if (info->shared)
945 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 946 /* Fall through */
947
252b5132 948 case R_386_GOT32:
13ae64f3 949 case R_386_TLS_GD:
252b5132 950 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 951 {
952 int tls_type, old_tls_type;
953
954 switch (r_type)
955 {
956 default:
957 case R_386_GOT32: tls_type = GOT_NORMAL; break;
958 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
37e55690
JJ		 959 case R_386_TLS_IE_32:
960 if (ELF32_R_TYPE (rel->r_info) == r_type)
961 tls_type = GOT_TLS_IE_NEG;
962 else
963 /* If this is a GD->IE transition, we may use either of
964 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
965 tls_type = GOT_TLS_IE;
966 break;
967 case R_386_TLS_IE:
968 case R_386_TLS_GOTIE:
969 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 970 }
971
972 if (h != NULL)
973 {
974 h->got.refcount += 1;
975 old_tls_type = elf_i386_hash_entry(h)->tls_type;
976 }
977 else
978 {
979 bfd_signed_vma *local_got_refcounts;
980
981 /* This is a global offset table entry for a local symbol. */
982 local_got_refcounts = elf_local_got_refcounts (abfd);
983 if (local_got_refcounts == NULL)
984 {
985 bfd_size_type size;
986
987 size = symtab_hdr->sh_info;
988 size *= (sizeof (bfd_signed_vma) + sizeof(char));
55fd94b0 989 local_got_refcounts = bfd_zalloc (abfd, size);
13ae64f3 990 if (local_got_refcounts == NULL)
b34976b6 991 return FALSE;
13ae64f3
JJ		 992 elf_local_got_refcounts (abfd) = local_got_refcounts;
993 elf_i386_local_got_tls_type (abfd)
994 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
995 }
996 local_got_refcounts[r_symndx] += 1;
997 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
998 }
999
37e55690
JJ		 1000 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1001 tls_type |= old_tls_type;
13ae64f3
JJ		 1002 /* If a TLS symbol is accessed using IE at least once,
1003 there is no point to use dynamic model for it. */
37e55690
JJ		 1004 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1005 && (old_tls_type != GOT_TLS_GD
1006 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1007 {
37e55690
JJ		 1008 if ((old_tls_type & GOT_TLS_IE) && tls_type == GOT_TLS_GD)
1009 tls_type = old_tls_type;
13ae64f3
JJ		 1010 else
1011 {
1012 (*_bfd_error_handler)
d003868e 1013 (_("%B: `%s' accessed both as normal and "
55fd94b0 1014 "thread local symbol"),
d003868e 1015 abfd,
37e55690 1016 h ? h->root.root.string : "<local>");
b34976b6 1017 return FALSE;
13ae64f3
JJ		 1018 }
1019 }
1020
1021 if (old_tls_type != tls_type)
1022 {
1023 if (h != NULL)
1024 elf_i386_hash_entry (h)->tls_type = tls_type;
1025 else
1026 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1027 }
1028 }
0ac8d2ca
AM		 1029 /* Fall through */
1030
1031 case R_386_GOTOFF:
1032 case R_386_GOTPC:
13ae64f3 1033 create_got:
0ac8d2ca
AM		 1034 if (htab->sgot == NULL)
1035 {
1036 if (htab->elf.dynobj == NULL)
1037 htab->elf.dynobj = abfd;
1038 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 1039 return FALSE;
0ac8d2ca 1040 }
37e55690
JJ		 1041 if (r_type != R_386_TLS_IE)
1042 break;
1043 /* Fall through */
252b5132 1044
37e55690
JJ		 1045 case R_386_TLS_LE_32:
1046 case R_386_TLS_LE:
1047 if (!info->shared)
1048 break;
bffbf940 1049 info->flags |= DF_STATIC_TLS;
b34976b6 1050 /* Fall through */
252b5132
RH		 1051
1052 case R_386_32:
1053 case R_386_PC32:
12d0ee4a 1054 if (h != NULL && !info->shared)
6725bdbf 1055 {
12d0ee4a 1056 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1057 need a copy reloc. We can't check reliably at this
1058 stage whether the section is read-only, as input
1059 sections have not yet been mapped to output sections.
1060 Tentatively set the flag for now, and correct in
1061 adjust_dynamic_symbol. */
f5385ebf 1062 h->non_got_ref = 1;
12d0ee4a
AM		 1063
1064 /* We may need a .plt entry if the function this reloc
1065 refers to is in a shared lib. */
51b64d56 1066 h->plt.refcount += 1;
c6585bbb 1067 if (r_type != R_386_PC32)
f5385ebf 1068 h->pointer_equality_needed = 1;
6725bdbf 1069 }
7843f00e 1070
252b5132 1071 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1072 against a global symbol, or a non PC relative reloc
1073 against a local symbol, then we need to copy the reloc
1074 into the shared library. However, if we are linking with
1075 -Bsymbolic, we do not need to copy a reloc against a
1076 global symbol which is defined in an object we are
1077 including in the link (i.e., DEF_REGULAR is set). At
1078 this point we have not seen all the input files, so it is
1079 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1080 later (it is never cleared). In case of a weak definition,
1081 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1082 a shared library. We account for that possibility below by
1f655a09
L		 1083 storing information in the relocs_copied field of the hash
1084 table entry. A similar situation occurs when creating
1085 shared libraries and symbol visibility changes render the
12d0ee4a 1086 symbol local.
56882138 1087
12d0ee4a
AM		 1088 If on the other hand, we are creating an executable, we
1089 may need to keep relocations for symbols satisfied by a
1090 dynamic library if we manage to avoid copy relocs for the
1091 symbol. */
1092 if ((info->shared
1093 && (sec->flags & SEC_ALLOC) != 0
13ae64f3 1094 && (r_type != R_386_PC32
12d0ee4a
AM		 1095 || (h != NULL
1096 && (! info->symbolic
1097 || h->root.type == bfd_link_hash_defweak
f5385ebf 1098 || !h->def_regular))))
a23b6845
AM		 1099 || (ELIMINATE_COPY_RELOCS
1100 && !info->shared
12d0ee4a
AM		 1101 && (sec->flags & SEC_ALLOC) != 0
1102 && h != NULL
12d0ee4a 1103 && (h->root.type == bfd_link_hash_defweak
f5385ebf 1104 || !h->def_regular)))
252b5132 1105 {
ec338859
AM		 1106 struct elf_i386_dyn_relocs *p;
1107 struct elf_i386_dyn_relocs **head;
1108
12d0ee4a
AM		 1109 /* We must copy these reloc types into the output file.
1110 Create a reloc section in dynobj and make room for
1111 this reloc. */
252b5132
RH		 1112 if (sreloc == NULL)
1113 {
1114 const char *name;
0ac8d2ca 1115 bfd *dynobj;
e92d460e
AM		 1116 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1117 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
252b5132 1118
e92d460e 1119 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
252b5132 1120 if (name == NULL)
b34976b6 1121 return FALSE;
252b5132 1122
c8492176
L		 1123 if (strncmp (name, ".rel", 4) != 0
1124 || strcmp (bfd_get_section_name (abfd, sec),
1125 name + 4) != 0)
1126 {
0c715baa 1127 (*_bfd_error_handler)
d003868e
AM		 1128 (_("%B: bad relocation section name `%s\'"),
1129 abfd, name);
f5f31454 1130 }
252b5132 1131
0ac8d2ca
AM		 1132 if (htab->elf.dynobj == NULL)
1133 htab->elf.dynobj = abfd;
1134
1135 dynobj = htab->elf.dynobj;
252b5132
RH		 1136 sreloc = bfd_get_section_by_name (dynobj, name);
1137 if (sreloc == NULL)
1138 {
1139 flagword flags;
1140
252b5132
RH		 1141 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1142 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1143 if ((sec->flags & SEC_ALLOC) != 0)
1144 flags |= SEC_ALLOC | SEC_LOAD;
3496cb2a
L		 1145 sreloc = bfd_make_section_with_flags (dynobj,
1146 name,
1147 flags);
252b5132 1148 if (sreloc == NULL
252b5132 1149 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
b34976b6 1150 return FALSE;
252b5132 1151 }
0c715baa 1152 elf_section_data (sec)->sreloc = sreloc;
252b5132
RH		 1153 }
1154
0c715baa
AM		 1155 /* If this is a global symbol, we count the number of
1156 relocations we need for this symbol. */
1157 if (h != NULL)
252b5132 1158 {
ec338859 1159 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
0c715baa
AM		 1160 }
1161 else
1162 {
ec338859
AM		 1163 /* Track dynamic relocs needed for local syms too.
1164 We really need local syms available to do this
1165 easily. Oh well. */
1166
1167 asection *s;
1168 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1169 sec, r_symndx);
1170 if (s == NULL)
b34976b6 1171 return FALSE;
ec338859
AM		 1172
1173 head = ((struct elf_i386_dyn_relocs **)
1174 &elf_section_data (s)->local_dynrel);
1175 }
1176
1177 p = *head;
1178 if (p == NULL || p->sec != sec)
1179 {
1180 bfd_size_type amt = sizeof *p;
55fd94b0 1181 p = bfd_alloc (htab->elf.dynobj, amt);
ec338859 1182 if (p == NULL)
b34976b6 1183 return FALSE;
ec338859
AM		 1184 p->next = *head;
1185 *head = p;
1186 p->sec = sec;
1187 p->count = 0;
1188 p->pc_count = 0;
252b5132 1189 }
ec338859
AM		 1190
1191 p->count += 1;
13ae64f3 1192 if (r_type == R_386_PC32)
ec338859 1193 p->pc_count += 1;
252b5132 1194 }
252b5132
RH		 1195 break;
1196
1197 /* This relocation describes the C++ object vtable hierarchy.
1198 Reconstruct it for later use during GC. */
1199 case R_386_GNU_VTINHERIT:
c152c796 1200 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 1201 return FALSE;
252b5132
RH		 1202 break;
1203
1204 /* This relocation describes which C++ vtable entries are actually
1205 used. Record for later use during GC. */
1206 case R_386_GNU_VTENTRY:
c152c796 1207 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6 1208 return FALSE;
252b5132
RH		 1209 break;
1210
1211 default:
1212 break;
1213 }
1214 }
1215
b34976b6 1216 return TRUE;
252b5132
RH		 1217}
1218
1219/* Return the section that should be marked against GC for a given
1220 relocation. */
1221
1222static asection *
55fd94b0
AM		 1223elf_i386_gc_mark_hook (asection *sec,
1224 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1225 Elf_Internal_Rela *rel,
1226 struct elf_link_hash_entry *h,
1227 Elf_Internal_Sym *sym)
252b5132
RH		 1228{
1229 if (h != NULL)
1230 {
1231 switch (ELF32_R_TYPE (rel->r_info))
1232 {
1233 case R_386_GNU_VTINHERIT:
1234 case R_386_GNU_VTENTRY:
1235 break;
1236
1237 default:
1238 switch (h->root.type)
1239 {
1240 case bfd_link_hash_defined:
1241 case bfd_link_hash_defweak:
1242 return h->root.u.def.section;
1243
1244 case bfd_link_hash_common:
1245 return h->root.u.c.p->section;
1246
1247 default:
1248 break;
1249 }
1250 }
1251 }
1252 else
1e2f5b6e 1253 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
252b5132
RH		 1254
1255 return NULL;
1256}
1257
1258/* Update the got entry reference counts for the section being removed. */
1259
b34976b6 1260static bfd_boolean
55fd94b0
AM		 1261elf_i386_gc_sweep_hook (bfd *abfd,
1262 struct bfd_link_info *info,
1263 asection *sec,
1264 const Elf_Internal_Rela *relocs)
252b5132 1265{
dd5724d5
AM		 1266 Elf_Internal_Shdr *symtab_hdr;
1267 struct elf_link_hash_entry **sym_hashes;
1268 bfd_signed_vma *local_got_refcounts;
1269 const Elf_Internal_Rela *rel, *relend;
dd5724d5 1270
ec338859 1271 elf_section_data (sec)->local_dynrel = NULL;
dd5724d5 1272
6725bdbf
AM		 1273 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1274 sym_hashes = elf_sym_hashes (abfd);
1275 local_got_refcounts = elf_local_got_refcounts (abfd);
dd5724d5
AM		 1276
1277 relend = relocs + sec->reloc_count;
1278 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 1279 {
1280 unsigned long r_symndx;
1281 unsigned int r_type;
1282 struct elf_link_hash_entry *h = NULL;
37e55690 1283
26e41594
AM		 1284 r_symndx = ELF32_R_SYM (rel->r_info);
1285 if (r_symndx >= symtab_hdr->sh_info)
1286 {
1287 struct elf_i386_link_hash_entry *eh;
1288 struct elf_i386_dyn_relocs **pp;
1289 struct elf_i386_dyn_relocs *p;
dd5724d5 1290
26e41594 1291 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 1292 while (h->root.type == bfd_link_hash_indirect
1293 || h->root.type == bfd_link_hash_warning)
1294 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 1295 eh = (struct elf_i386_link_hash_entry *) h;
0c715baa 1296
26e41594
AM		 1297 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1298 if (p->sec == sec)
1299 {
1300 /* Everything must go for SEC. */
1301 *pp = p->next;
1302 break;
1303 }
1304 }
0c715baa 1305
26e41594
AM		 1306 r_type = ELF32_R_TYPE (rel->r_info);
1307 r_type = elf_i386_tls_transition (info, r_type, h != NULL);
1308 switch (r_type)
1309 {
1310 case R_386_TLS_LDM:
1311 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1312 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1313 break;
0c715baa 1314
26e41594
AM		 1315 case R_386_TLS_GD:
1316 case R_386_TLS_IE_32:
1317 case R_386_TLS_IE:
1318 case R_386_TLS_GOTIE:
1319 case R_386_GOT32:
1320 if (h != NULL)
1321 {
1322 if (h->got.refcount > 0)
1323 h->got.refcount -= 1;
1324 }
1325 else if (local_got_refcounts != NULL)
1326 {
1327 if (local_got_refcounts[r_symndx] > 0)
1328 local_got_refcounts[r_symndx] -= 1;
1329 }
1330 break;
0c715baa 1331
26e41594
AM		 1332 case R_386_32:
1333 case R_386_PC32:
1334 if (info->shared)
1335 break;
1336 /* Fall through */
6725bdbf 1337
26e41594
AM		 1338 case R_386_PLT32:
1339 if (h != NULL)
1340 {
1341 if (h->plt.refcount > 0)
1342 h->plt.refcount -= 1;
1343 }
1344 break;
dd5724d5 1345
26e41594
AM		 1346 default:
1347 break;
1348 }
1349 }
252b5132 1350
b34976b6 1351 return TRUE;
252b5132
RH		 1352}
1353
1354/* Adjust a symbol defined by a dynamic object and referenced by a
1355 regular object. The current definition is in some section of the
1356 dynamic object, but we're not including those sections. We have to
1357 change the definition to something the rest of the link can
1358 understand. */
1359
b34976b6 1360static bfd_boolean
55fd94b0
AM		 1361elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1362 struct elf_link_hash_entry *h)
252b5132 1363{
6725bdbf 1364 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1365 asection *s;
1366 unsigned int power_of_two;
1367
252b5132
RH		 1368 /* If this is a function, put it in the procedure linkage table. We
1369 will fill in the contents of the procedure linkage table later,
1370 when we know the address of the .got section. */
1371 if (h->type == STT_FUNC
f5385ebf 1372 || h->needs_plt)
252b5132 1373 {
6725bdbf 1374 if (h->plt.refcount <= 0
9c7a29a3
AM		 1375 || SYMBOL_CALLS_LOCAL (info, h)
1376 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1377 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 1378 {
1379 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM		 1380 file, but the symbol was never referred to by a dynamic
1381 object, or if all references were garbage collected. In
1382 such a case, we don't actually need to build a procedure
1383 linkage table, and we can just do a PC32 reloc instead. */
bbd7ec4a 1384 h->plt.offset = (bfd_vma) -1;
f5385ebf 1385 h->needs_plt = 0;
252b5132
RH		 1386 }
1387
b34976b6 1388 return TRUE;
252b5132 1389 }
6725bdbf
AM		 1390 else
1391 /* It's possible that we incorrectly decided a .plt reloc was
1392 needed for an R_386_PC32 reloc to a non-function sym in
1393 check_relocs. We can't decide accurately between function and
1394 non-function syms in check-relocs; Objects loaded later in
1395 the link may change h->type. So fix it now. */
bbd7ec4a 1396 h->plt.offset = (bfd_vma) -1;
252b5132
RH		 1397
1398 /* If this is a weak symbol, and there is a real definition, the
1399 processor independent code will have arranged for us to see the
1400 real definition first, and we can just use the same value. */
f6e332e6 1401 if (h->u.weakdef != NULL)
252b5132 1402 {
f6e332e6
AM		 1403 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1404 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1405 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1406 h->root.u.def.value = h->u.weakdef->root.u.def.value;
a23b6845 1407 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 1408 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 1409 return TRUE;
252b5132
RH		 1410 }
1411
1412 /* This is a reference to a symbol defined by a dynamic object which
1413 is not a function. */
1414
1415 /* If we are creating a shared library, we must presume that the
1416 only references to the symbol are via the global offset table.
1417 For such cases we need not do anything here; the relocations will
1418 be handled correctly by relocate_section. */
1419 if (info->shared)
b34976b6 1420 return TRUE;
252b5132 1421
7843f00e
ILT		 1422 /* If there are no references to this symbol that do not use the
1423 GOT, we don't need to generate a copy reloc. */
f5385ebf 1424 if (!h->non_got_ref)
b34976b6 1425 return TRUE;
7843f00e 1426
8bd621d8
AM		 1427 /* If -z nocopyreloc was given, we won't generate them either. */
1428 if (info->nocopyreloc)
1429 {
f5385ebf 1430 h->non_got_ref = 0;
b34976b6 1431 return TRUE;
8bd621d8
AM		 1432 }
1433
a23b6845 1434 if (ELIMINATE_COPY_RELOCS)
ebe50bae 1435 {
a23b6845
AM		 1436 struct elf_i386_link_hash_entry * eh;
1437 struct elf_i386_dyn_relocs *p;
ebe50bae 1438
a23b6845
AM		 1439 eh = (struct elf_i386_link_hash_entry *) h;
1440 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1441 {
1442 s = p->sec->output_section;
1443 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1444 break;
1445 }
1446
1447 /* If we didn't find any dynamic relocs in read-only sections, then
1448 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1449 if (p == NULL)
1450 {
f5385ebf 1451 h->non_got_ref = 0;
a23b6845
AM		 1452 return TRUE;
1453 }
ebe50bae
AM		 1454 }
1455
252b5132
RH		 1456 /* We must allocate the symbol in our .dynbss section, which will
1457 become part of the .bss section of the executable. There will be
1458 an entry for this symbol in the .dynsym section. The dynamic
1459 object will contain position independent code, so all references
1460 from the dynamic object to this symbol will go through the global
1461 offset table. The dynamic linker will use the .dynsym entry to
1462 determine the address it must put in the global offset table, so
1463 both the dynamic object and the regular object will refer to the
1464 same memory location for the variable. */
1465
0ac8d2ca 1466 htab = elf_i386_hash_table (info);
252b5132
RH		 1467
1468 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1469 copy the initial value out of the dynamic object and into the
0ac8d2ca 1470 runtime process image. */
252b5132
RH		 1471 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1472 {
eea6121a 1473 htab->srelbss->size += sizeof (Elf32_External_Rel);
f5385ebf 1474 h->needs_copy = 1;
252b5132
RH		 1475 }
1476
1477 /* We need to figure out the alignment required for this symbol. I
1478 have no idea how ELF linkers handle this. */
1479 power_of_two = bfd_log2 (h->size);
1480 if (power_of_two > 3)
1481 power_of_two = 3;
1482
1483 /* Apply the required alignment. */
0ac8d2ca 1484 s = htab->sdynbss;
eea6121a 1485 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
0ac8d2ca 1486 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
252b5132 1487 {
0ac8d2ca 1488 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
b34976b6 1489 return FALSE;
252b5132
RH		 1490 }
1491
1492 /* Define the symbol as being at this point in the section. */
1493 h->root.u.def.section = s;
eea6121a 1494 h->root.u.def.value = s->size;
252b5132
RH		 1495
1496 /* Increment the section size to make room for the symbol. */
eea6121a 1497 s->size += h->size;
252b5132 1498
b34976b6 1499 return TRUE;
252b5132
RH		 1500}
1501
6725bdbf 1502/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 1503 dynamic relocs. */
6725bdbf 1504
b34976b6 1505static bfd_boolean
55fd94b0 1506allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 1507{
1508 struct bfd_link_info *info;
1509 struct elf_i386_link_hash_table *htab;
5a15f56f 1510 struct elf_i386_link_hash_entry *eh;
0c715baa 1511 struct elf_i386_dyn_relocs *p;
6725bdbf 1512
e92d460e 1513 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1514 return TRUE;
6725bdbf 1515
e92d460e
AM		 1516 if (h->root.type == bfd_link_hash_warning)
1517 /* When warning symbols are created, they **replace** the "real"
1518 entry in the hash table, thus we never get to see the real
1519 symbol in a hash traversal. So look at it now. */
1520 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1521
6725bdbf
AM		 1522 info = (struct bfd_link_info *) inf;
1523 htab = elf_i386_hash_table (info);
1524
ebe50bae 1525 if (htab->elf.dynamic_sections_created
9c7a29a3 1526 && h->plt.refcount > 0)
6725bdbf 1527 {
5a15f56f
AM		 1528 /* Make sure this symbol is output as a dynamic symbol.
1529 Undefined weak syms won't yet be marked as dynamic. */
1530 if (h->dynindx == -1
f5385ebf 1531 && !h->forced_local)
5a15f56f 1532 {
c152c796 1533 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1534 return FALSE;
5a15f56f
AM		 1535 }
1536
4e795f50
AM		 1537 if (info->shared
1538 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 1539 {
0ac8d2ca 1540 asection *s = htab->splt;
6725bdbf 1541
ced53ee5
AM		 1542 /* If this is the first .plt entry, make room for the special
1543 first entry. */
eea6121a
AM		 1544 if (s->size == 0)
1545 s->size += PLT_ENTRY_SIZE;
6725bdbf 1546
eea6121a 1547 h->plt.offset = s->size;
6725bdbf 1548
ced53ee5
AM		 1549 /* If this symbol is not defined in a regular file, and we are
1550 not generating a shared library, then set the symbol to this
1551 location in the .plt. This is required to make function
1552 pointers compare as equal between the normal executable and
1553 the shared library. */
1554 if (! info->shared
f5385ebf 1555 && !h->def_regular)
ced53ee5
AM		 1556 {
1557 h->root.u.def.section = s;
1558 h->root.u.def.value = h->plt.offset;
1559 }
6725bdbf 1560
ced53ee5 1561 /* Make room for this entry. */
eea6121a 1562 s->size += PLT_ENTRY_SIZE;
6725bdbf 1563
ced53ee5
AM		 1564 /* We also need to make an entry in the .got.plt section, which
1565 will be placed in the .got section by the linker script. */
eea6121a 1566 htab->sgotplt->size += 4;
6725bdbf 1567
6725bdbf 1568 /* We also need to make an entry in the .rel.plt section. */
eea6121a 1569 htab->srelplt->size += sizeof (Elf32_External_Rel);
eac338cf
PB		 1570
1571 if (htab->is_vxworks && !info->shared)
1572 {
1573 /* VxWorks has a second set of relocations for each PLT entry
1574 in executables. They go in a separate relocation section,
1575 which is processed by the kernel loader. */
1576
1577 /* There are two relocations for the initial PLT entry: an
1578 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1579 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1580
1581 if (h->plt.offset == PLT_ENTRY_SIZE)
1582 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1583
1584 /* There are two extra relocations for each subsequent PLT entry:
1585 an R_386_32 relocation for the GOT entry, and an R_386_32
1586 relocation for the PLT entry. */
1587
1588 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1589 }
6725bdbf 1590 }
ced53ee5
AM		 1591 else
1592 {
51b64d56 1593 h->plt.offset = (bfd_vma) -1;
f5385ebf 1594 h->needs_plt = 0;
ced53ee5 1595 }
6725bdbf
AM		 1596 }
1597 else
1598 {
51b64d56 1599 h->plt.offset = (bfd_vma) -1;
f5385ebf 1600 h->needs_plt = 0;
6725bdbf
AM		 1601 }
1602
37e55690 1603 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 1604 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1605 if (h->got.refcount > 0
1606 && !info->shared
1607 && h->dynindx == -1
37e55690 1608 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
cedb70c5 1609 h->got.offset = (bfd_vma) -1;
13ae64f3 1610 else if (h->got.refcount > 0)
6725bdbf 1611 {
0ac8d2ca 1612 asection *s;
b34976b6 1613 bfd_boolean dyn;
13ae64f3 1614 int tls_type = elf_i386_hash_entry(h)->tls_type;
6725bdbf 1615
5a15f56f
AM		 1616 /* Make sure this symbol is output as a dynamic symbol.
1617 Undefined weak syms won't yet be marked as dynamic. */
1618 if (h->dynindx == -1
f5385ebf 1619 && !h->forced_local)
5a15f56f 1620 {
c152c796 1621 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1622 return FALSE;
5a15f56f
AM		 1623 }
1624
6725bdbf 1625 s = htab->sgot;
eea6121a
AM		 1626 h->got.offset = s->size;
1627 s->size += 4;
13ae64f3 1628 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
37e55690 1629 if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE_BOTH)
eea6121a 1630 s->size += 4;
ebe50bae 1631 dyn = htab->elf.dynamic_sections_created;
13ae64f3 1632 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 1633 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1634 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1635 need two), R_386_TLS_GD needs one if local symbol and two if
1636 global. */
1637 if (tls_type == GOT_TLS_IE_BOTH)
eea6121a 1638 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
37e55690
JJ		 1639 else if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1640 || (tls_type & GOT_TLS_IE))
eea6121a 1641 htab->srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3 1642 else if (tls_type == GOT_TLS_GD)
eea6121a 1643 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
ef5aade5
L		 1644 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1645 || h->root.type != bfd_link_hash_undefweak)
1646 && (info->shared
1647 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
eea6121a 1648 htab->srelgot->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 1649 }
1650 else
51b64d56 1651 h->got.offset = (bfd_vma) -1;
6725bdbf 1652
5a15f56f
AM		 1653 eh = (struct elf_i386_link_hash_entry *) h;
1654 if (eh->dyn_relocs == NULL)
b34976b6 1655 return TRUE;
5a15f56f 1656
0c715baa
AM		 1657 /* In the shared -Bsymbolic case, discard space allocated for
1658 dynamic pc-relative relocs against symbols which turn out to be
1659 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 1660 space for pc-relative relocs that have become local due to symbol
1661 visibility changes. */
0c715baa
AM		 1662
1663 if (info->shared)
5a15f56f 1664 {
09695f56
AM		 1665 /* The only reloc that uses pc_count is R_386_PC32, which will
1666 appear on a call or on something like ".long foo - .". We
1667 want calls to protected symbols to resolve directly to the
1668 function rather than going via the plt. If people want
1669 function pointer comparisons to work as expected then they
1670 should avoid writing assembly like ".long foo - .". */
1671 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 1672 {
0c715baa
AM		 1673 struct elf_i386_dyn_relocs **pp;
1674
1675 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1676 {
1677 p->count -= p->pc_count;
1678 p->pc_count = 0;
1679 if (p->count == 0)
1680 *pp = p->next;
1681 else
1682 pp = &p->next;
1683 }
5a15f56f 1684 }
4e795f50
AM		 1685
1686 /* Also discard relocs on undefined weak syms with non-default
1687 visibility. */
1688 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1689 && h->root.type == bfd_link_hash_undefweak)
1690 eh->dyn_relocs = NULL;
0c715baa 1691 }
a23b6845 1692 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 1693 {
1694 /* For the non-shared case, discard space for relocs against
1695 symbols which turn out to need copy relocs or are not
1696 dynamic. */
1697
f5385ebf
AM		 1698 if (!h->non_got_ref
1699 && ((h->def_dynamic
1700 && !h->def_regular)
ebe50bae 1701 || (htab->elf.dynamic_sections_created
0c715baa
AM		 1702 && (h->root.type == bfd_link_hash_undefweak
1703 || h->root.type == bfd_link_hash_undefined))))
1704 {
1705 /* Make sure this symbol is output as a dynamic symbol.
1706 Undefined weak syms won't yet be marked as dynamic. */
1707 if (h->dynindx == -1
f5385ebf 1708 && !h->forced_local)
0c715baa 1709 {
c152c796 1710 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1711 return FALSE;
0c715baa 1712 }
5a15f56f 1713
0c715baa
AM		 1714 /* If that succeeded, we know we'll be keeping all the
1715 relocs. */
1716 if (h->dynindx != -1)
1717 goto keep;
1718 }
1719
1720 eh->dyn_relocs = NULL;
1721
ec338859 1722 keep: ;
5a15f56f
AM		 1723 }
1724
0c715baa
AM		 1725 /* Finally, allocate space. */
1726 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 1727 {
0c715baa 1728 asection *sreloc = elf_section_data (p->sec)->sreloc;
eea6121a 1729 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 1730 }
1731
b34976b6 1732 return TRUE;
6725bdbf
AM		 1733}
1734
0c715baa
AM		 1735/* Find any dynamic relocs that apply to read-only sections. */
1736
b34976b6 1737static bfd_boolean
55fd94b0 1738readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
0c715baa
AM		 1739{
1740 struct elf_i386_link_hash_entry *eh;
1741 struct elf_i386_dyn_relocs *p;
1742
e92d460e
AM		 1743 if (h->root.type == bfd_link_hash_warning)
1744 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1745
0c715baa
AM		 1746 eh = (struct elf_i386_link_hash_entry *) h;
1747 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1748 {
1749 asection *s = p->sec->output_section;
1750
1751 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1752 {
1753 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1754
1755 info->flags |= DF_TEXTREL;
1756
1757 /* Not an error, just cut short the traversal. */
b34976b6 1758 return FALSE;
0c715baa
AM		 1759 }
1760 }
b34976b6 1761 return TRUE;
0c715baa
AM		 1762}
1763
252b5132
RH		 1764/* Set the sizes of the dynamic sections. */
1765
b34976b6 1766static bfd_boolean
55fd94b0
AM		 1767elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1768 struct bfd_link_info *info)
252b5132 1769{
6725bdbf 1770 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1771 bfd *dynobj;
1772 asection *s;
b34976b6 1773 bfd_boolean relocs;
0c715baa 1774 bfd *ibfd;
252b5132 1775
6725bdbf 1776 htab = elf_i386_hash_table (info);
ebe50bae 1777 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 1778 if (dynobj == NULL)
1779 abort ();
252b5132 1780
ebe50bae 1781 if (htab->elf.dynamic_sections_created)
252b5132
RH		 1782 {
1783 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 1784 if (info->executable)
252b5132
RH		 1785 {
1786 s = bfd_get_section_by_name (dynobj, ".interp");
ffb2e45b
AM		 1787 if (s == NULL)
1788 abort ();
eea6121a 1789 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132
RH		 1790 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1791 }
161d71a6 1792 }
6725bdbf 1793
0c715baa
AM		 1794 /* Set up .got offsets for local syms, and space for local dynamic
1795 relocs. */
1796 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
161d71a6
L		 1797 {
1798 bfd_signed_vma *local_got;
1799 bfd_signed_vma *end_local_got;
13ae64f3 1800 char *local_tls_type;
161d71a6
L		 1801 bfd_size_type locsymcount;
1802 Elf_Internal_Shdr *symtab_hdr;
1803 asection *srel;
6725bdbf 1804
0c715baa 1805 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
161d71a6 1806 continue;
6725bdbf 1807
0c715baa
AM		 1808 for (s = ibfd->sections; s != NULL; s = s->next)
1809 {
ec338859 1810 struct elf_i386_dyn_relocs *p;
0c715baa 1811
ec338859
AM		 1812 for (p = *((struct elf_i386_dyn_relocs **)
1813 &elf_section_data (s)->local_dynrel);
1814 p != NULL;
1815 p = p->next)
0c715baa 1816 {
ec338859
AM		 1817 if (!bfd_is_abs_section (p->sec)
1818 && bfd_is_abs_section (p->sec->output_section))
1819 {
1820 /* Input section has been discarded, either because
1821 it is a copy of a linkonce section or due to
1822 linker script /DISCARD/, so we'll be discarding
1823 the relocs too. */
1824 }
248866a8 1825 else if (p->count != 0)
ec338859
AM		 1826 {
1827 srel = elf_section_data (p->sec)->sreloc;
eea6121a 1828 srel->size += p->count * sizeof (Elf32_External_Rel);
248866a8
AM		 1829 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1830 info->flags |= DF_TEXTREL;
ec338859 1831 }
0c715baa
AM		 1832 }
1833 }
1834
1835 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 1836 if (!local_got)
1837 continue;
6725bdbf 1838
0c715baa 1839 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
161d71a6
L		 1840 locsymcount = symtab_hdr->sh_info;
1841 end_local_got = local_got + locsymcount;
13ae64f3 1842 local_tls_type = elf_i386_local_got_tls_type (ibfd);
161d71a6
L		 1843 s = htab->sgot;
1844 srel = htab->srelgot;
13ae64f3 1845 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
161d71a6
L		 1846 {
1847 if (*local_got > 0)
6725bdbf 1848 {
eea6121a
AM		 1849 *local_got = s->size;
1850 s->size += 4;
37e55690
JJ		 1851 if (*local_tls_type == GOT_TLS_GD
1852 || *local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 1853 s->size += 4;
13ae64f3
JJ		 1854 if (info->shared
1855 || *local_tls_type == GOT_TLS_GD
37e55690
JJ		 1856 || (*local_tls_type & GOT_TLS_IE))
1857 {
1858 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 1859 srel->size += 2 * sizeof (Elf32_External_Rel);
37e55690 1860 else
eea6121a 1861 srel->size += sizeof (Elf32_External_Rel);
37e55690 1862 }
6725bdbf 1863 }
161d71a6
L		 1864 else
1865 *local_got = (bfd_vma) -1;
6725bdbf 1866 }
252b5132 1867 }
6725bdbf 1868
13ae64f3
JJ		 1869 if (htab->tls_ldm_got.refcount > 0)
1870 {
1871 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1872 relocs. */
eea6121a
AM		 1873 htab->tls_ldm_got.offset = htab->sgot->size;
1874 htab->sgot->size += 8;
1875 htab->srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 1876 }
1877 else
1878 htab->tls_ldm_got.offset = -1;
1879
eac338cf
PB		 1880 if (htab->is_vxworks)
1881 {
1882 /* Save the GOT and PLT symbols in the hash table for easy access.
1883 Mark them as having relocations; they might not, but we won't
1884 know for sure until we build the GOT in finish_dynamic_symbol. */
1885
1886 htab->hgot = elf_link_hash_lookup (elf_hash_table (info),
1887 "_GLOBAL_OFFSET_TABLE_",
1888 FALSE, FALSE, FALSE);
1889 if (htab->hgot)
1890 htab->hgot->indx = -2;
1891 htab->hplt = elf_link_hash_lookup (elf_hash_table (info),
1892 "_PROCEDURE_LINKAGE_TABLE_",
1893 FALSE, FALSE, FALSE);
1894 if (htab->hplt)
1895 htab->hplt->indx = -2;
1896
1897 if (htab->is_vxworks && htab->hplt && htab->splt->flags & SEC_CODE)
1898 htab->hplt->type = STT_FUNC;
1899 }
1900
0c715baa
AM		 1901 /* Allocate global sym .plt and .got entries, and space for global
1902 sym dynamic relocs. */
ebe50bae 1903 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
252b5132 1904
5a15f56f
AM		 1905 /* We now have determined the sizes of the various dynamic sections.
1906 Allocate memory for them. */
b34976b6 1907 relocs = FALSE;
252b5132
RH		 1908 for (s = dynobj->sections; s != NULL; s = s->next)
1909 {
eac338cf
PB		 1910 bfd_boolean strip_section = TRUE;
1911
252b5132
RH		 1912 if ((s->flags & SEC_LINKER_CREATED) == 0)
1913 continue;
1914
6725bdbf
AM		 1915 if (s == htab->splt
1916 || s == htab->sgot
1917 || s == htab->sgotplt)
252b5132 1918 {
6725bdbf
AM		 1919 /* Strip this section if we don't need it; see the
1920 comment below. */
eac338cf
PB		 1921 /* We'd like to strip these sections if they aren't needed, but if
1922 we've exported dynamic symbols from them we must leave them.
1923 It's too late to tell BFD to get rid of the symbols. */
1924
1925 if (htab->hplt != NULL)
1926 strip_section = FALSE;
252b5132 1927 }
6725bdbf 1928 else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
252b5132 1929 {
eac338cf 1930 if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2)
b34976b6 1931 relocs = TRUE;
252b5132 1932
0ac8d2ca
AM		 1933 /* We use the reloc_count field as a counter if we need
1934 to copy relocs into the output file. */
1935 s->reloc_count = 0;
252b5132 1936 }
6725bdbf 1937 else
252b5132
RH		 1938 {
1939 /* It's not one of our sections, so don't allocate space. */
1940 continue;
1941 }
1942
eac338cf 1943 if (s->size == 0 && strip_section)
252b5132 1944 {
0ac8d2ca
AM		 1945 /* If we don't need this section, strip it from the
1946 output file. This is mostly to handle .rel.bss and
1947 .rel.plt. We must create both sections in
1948 create_dynamic_sections, because they must be created
1949 before the linker maps input sections to output
1950 sections. The linker does that before
1951 adjust_dynamic_symbol is called, and it is that
1952 function which decides whether anything needs to go
1953 into these sections. */
1954
8423293d 1955 s->flags |= SEC_EXCLUDE;
252b5132
RH		 1956 continue;
1957 }
1958
f69da49f
AM		 1959 /* Allocate memory for the section contents. We use bfd_zalloc
1960 here in case unused entries are not reclaimed before the
1961 section's contents are written out. This should not happen,
1962 but this way if it does, we get a R_386_NONE reloc instead
1963 of garbage. */
eea6121a 1964 s->contents = bfd_zalloc (dynobj, s->size);
6725bdbf 1965 if (s->contents == NULL)
b34976b6 1966 return FALSE;
252b5132
RH		 1967 }
1968
ebe50bae 1969 if (htab->elf.dynamic_sections_created)
252b5132
RH		 1970 {
1971 /* Add some entries to the .dynamic section. We fill in the
1972 values later, in elf_i386_finish_dynamic_sections, but we
1973 must add the entries now so that we get the correct size for
1974 the .dynamic section. The DT_DEBUG entry is filled in by the
1975 dynamic linker and used by the debugger. */
dc810e39 1976#define add_dynamic_entry(TAG, VAL) \
5a580b3a 1977 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 1978
36af4a4e 1979 if (info->executable)
252b5132 1980 {
dc810e39 1981 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 1982 return FALSE;
252b5132
RH		 1983 }
1984
eea6121a 1985 if (htab->splt->size != 0)
252b5132 1986 {
dc810e39
AM		 1987 if (!add_dynamic_entry (DT_PLTGOT, 0)
1988 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1989 || !add_dynamic_entry (DT_PLTREL, DT_REL)
1990 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 1991 return FALSE;
252b5132
RH		 1992 }
1993
1994 if (relocs)
1995 {
dc810e39
AM		 1996 if (!add_dynamic_entry (DT_REL, 0)
1997 || !add_dynamic_entry (DT_RELSZ, 0)
1998 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 1999 return FALSE;
252b5132 2000
0c715baa
AM		 2001 /* If any dynamic relocs apply to a read-only section,
2002 then we need a DT_TEXTREL entry. */
248866a8
AM		 2003 if ((info->flags & DF_TEXTREL) == 0)
2004 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2005 (PTR) info);
0c715baa
AM		 2006
2007 if ((info->flags & DF_TEXTREL) != 0)
2008 {
2009 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2010 return FALSE;
0c715baa 2011 }
252b5132
RH		 2012 }
2013 }
dc810e39 2014#undef add_dynamic_entry
252b5132 2015
b34976b6 2016 return TRUE;
252b5132
RH		 2017}
2018
38701953
AM		 2019/* Set the correct type for an x86 ELF section. We do this by the
2020 section name, which is a hack, but ought to work. */
2021
b34976b6 2022static bfd_boolean
55fd94b0
AM		 2023elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2024 Elf_Internal_Shdr *hdr,
2025 asection *sec)
38701953
AM		 2026{
2027 register const char *name;
2028
2029 name = bfd_get_section_name (abfd, sec);
2030
2031 /* This is an ugly, but unfortunately necessary hack that is
2032 needed when producing EFI binaries on x86. It tells
2033 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2034 containing ELF relocation info. We need this hack in order to
2035 be able to generate ELF binaries that can be translated into
2036 EFI applications (which are essentially COFF objects). Those
2037 files contain a COFF ".reloc" section inside an ELFNN object,
2038 which would normally cause BFD to segfault because it would
2039 attempt to interpret this section as containing relocation
2040 entries for section "oc". With this hack enabled, ".reloc"
2041 will be treated as a normal data section, which will avoid the
2042 segfault. However, you won't be able to create an ELFNN binary
2043 with a section named "oc" that needs relocations, but that's
2044 the kind of ugly side-effects you get when detecting section
2045 types based on their names... In practice, this limitation is
2046 unlikely to bite. */
2047 if (strcmp (name, ".reloc") == 0)
2048 hdr->sh_type = SHT_PROGBITS;
2049
b34976b6 2050 return TRUE;
38701953
AM		 2051}
2052
13ae64f3
JJ		 2053/* Return the base VMA address which should be subtracted from real addresses
2054 when resolving @dtpoff relocation.
2055 This is PT_TLS segment p_vaddr. */
2056
2057static bfd_vma
55fd94b0 2058dtpoff_base (struct bfd_link_info *info)
13ae64f3 2059{
e1918d23
AM		 2060 /* If tls_sec is NULL, we should have signalled an error already. */
2061 if (elf_hash_table (info)->tls_sec == NULL)
6a30718d 2062 return 0;
e1918d23 2063 return elf_hash_table (info)->tls_sec->vma;
13ae64f3
JJ		 2064}
2065
2066/* Return the relocation value for @tpoff relocation
2067 if STT_TLS virtual address is ADDRESS. */
2068
2069static bfd_vma
55fd94b0 2070tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 2071{
e1918d23 2072 struct elf_link_hash_table *htab = elf_hash_table (info);
13ae64f3 2073
e1918d23
AM		 2074 /* If tls_sec is NULL, we should have signalled an error already. */
2075 if (htab->tls_sec == NULL)
6a30718d 2076 return 0;
e1918d23 2077 return htab->tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 2078}
2079
252b5132
RH		 2080/* Relocate an i386 ELF section. */
2081
b34976b6 2082static bfd_boolean
55fd94b0
AM		 2083elf_i386_relocate_section (bfd *output_bfd,
2084 struct bfd_link_info *info,
2085 bfd *input_bfd,
2086 asection *input_section,
2087 bfd_byte *contents,
2088 Elf_Internal_Rela *relocs,
2089 Elf_Internal_Sym *local_syms,
2090 asection **local_sections)
252b5132 2091{
6725bdbf 2092 struct elf_i386_link_hash_table *htab;
252b5132
RH		 2093 Elf_Internal_Shdr *symtab_hdr;
2094 struct elf_link_hash_entry **sym_hashes;
2095 bfd_vma *local_got_offsets;
252b5132
RH		 2096 Elf_Internal_Rela *rel;
2097 Elf_Internal_Rela *relend;
2098
6725bdbf 2099 htab = elf_i386_hash_table (info);
252b5132
RH		 2100 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2101 sym_hashes = elf_sym_hashes (input_bfd);
2102 local_got_offsets = elf_local_got_offsets (input_bfd);
2103
252b5132
RH		 2104 rel = relocs;
2105 relend = relocs + input_section->reloc_count;
2106 for (; rel < relend; rel++)
2107 {
13ae64f3 2108 unsigned int r_type;
252b5132
RH		 2109 reloc_howto_type *howto;
2110 unsigned long r_symndx;
2111 struct elf_link_hash_entry *h;
2112 Elf_Internal_Sym *sym;
2113 asection *sec;
ffb2e45b 2114 bfd_vma off;
252b5132 2115 bfd_vma relocation;
b34976b6 2116 bfd_boolean unresolved_reloc;
252b5132 2117 bfd_reloc_status_type r;
1b452ec6 2118 unsigned int indx;
13ae64f3 2119 int tls_type;
252b5132
RH		 2120
2121 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 2122 if (r_type == R_386_GNU_VTINHERIT
2123 || r_type == R_386_GNU_VTENTRY)
252b5132 2124 continue;
dc47f327 2125
55fd94b0 2126 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 2127 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2128 >= R_386_ext - R_386_standard)
2129 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2130 >= R_386_tls - R_386_ext))
252b5132 2131 {
6ba842b6 2132 (*_bfd_error_handler)
d003868e
AM		 2133 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2134 input_bfd, input_section, r_type);
252b5132 2135 bfd_set_error (bfd_error_bad_value);
b34976b6 2136 return FALSE;
252b5132 2137 }
1b452ec6 2138 howto = elf_howto_table + indx;
252b5132
RH		 2139
2140 r_symndx = ELF32_R_SYM (rel->r_info);
2141
1049f94e 2142 if (info->relocatable)
252b5132 2143 {
4a335f3d 2144 bfd_vma val;
4a335f3d
AM		 2145 bfd_byte *where;
2146
0ac8d2ca 2147 /* This is a relocatable link. We don't have to change
252b5132
RH		 2148 anything, unless the reloc is against a section symbol,
2149 in which case we have to adjust according to where the
2150 section symbol winds up in the output section. */
4a335f3d
AM		 2151 if (r_symndx >= symtab_hdr->sh_info)
2152 continue;
2153
2154 sym = local_syms + r_symndx;
2155 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2156 continue;
2157
2158 sec = local_sections[r_symndx];
2159 val = sec->output_offset;
2160 if (val == 0)
2161 continue;
2162
2163 where = contents + rel->r_offset;
2164 switch (howto->size)
252b5132 2165 {
16a10388 2166 /* FIXME: overflow checks. */
4a335f3d 2167 case 0:
16a10388 2168 val += bfd_get_8 (input_bfd, where);
4a335f3d 2169 bfd_put_8 (input_bfd, val, where);
4a335f3d
AM		 2170 break;
2171 case 1:
16a10388 2172 val += bfd_get_16 (input_bfd, where);
4a335f3d 2173 bfd_put_16 (input_bfd, val, where);
4a335f3d
AM		 2174 break;
2175 case 2:
2176 val += bfd_get_32 (input_bfd, where);
2177 bfd_put_32 (input_bfd, val, where);
2178 break;
2179 default:
2180 abort ();
252b5132 2181 }
252b5132
RH		 2182 continue;
2183 }
2184
2185 /* This is a final link. */
2186 h = NULL;
2187 sym = NULL;
2188 sec = NULL;
b34976b6 2189 unresolved_reloc = FALSE;
252b5132
RH		 2190 if (r_symndx < symtab_hdr->sh_info)
2191 {
2192 sym = local_syms + r_symndx;
2193 sec = local_sections[r_symndx];
2194 relocation = (sec->output_section->vma
2195 + sec->output_offset
2196 + sym->st_value);
f8df10f4
JJ		 2197 if ((sec->flags & SEC_MERGE)
2198 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2199 {
2200 asection *msec;
2201 bfd_vma addend;
4a335f3d 2202 bfd_byte *where = contents + rel->r_offset;
f8df10f4 2203
4a335f3d 2204 switch (howto->size)
f8df10f4 2205 {
4a335f3d
AM		 2206 case 0:
2207 addend = bfd_get_8 (input_bfd, where);
2208 if (howto->pc_relative)
2209 {
2210 addend = (addend ^ 0x80) - 0x80;
2211 addend += 1;
2212 }
2213 break;
2214 case 1:
2215 addend = bfd_get_16 (input_bfd, where);
2216 if (howto->pc_relative)
2217 {
2218 addend = (addend ^ 0x8000) - 0x8000;
2219 addend += 2;
2220 }
2221 break;
2222 case 2:
2223 addend = bfd_get_32 (input_bfd, where);
2224 if (howto->pc_relative)
2225 {
2226 addend = (addend ^ 0x80000000) - 0x80000000;
2227 addend += 4;
2228 }
2229 break;
2230 default:
2231 abort ();
f8df10f4
JJ		 2232 }
2233
f8df10f4 2234 msec = sec;
4a335f3d
AM		 2235 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
2236 addend -= relocation;
f8df10f4 2237 addend += msec->output_section->vma + msec->output_offset;
4a335f3d
AM		 2238
2239 switch (howto->size)
2240 {
2241 case 0:
16a10388 2242 /* FIXME: overflow checks. */
4a335f3d
AM		 2243 if (howto->pc_relative)
2244 addend -= 1;
2245 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 2246 break;
2247 case 1:
2248 if (howto->pc_relative)
2249 addend -= 2;
2250 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 2251 break;
2252 case 2:
2253 if (howto->pc_relative)
2254 addend -= 4;
2255 bfd_put_32 (input_bfd, addend, where);
2256 break;
2257 }
f8df10f4 2258 }
252b5132
RH		 2259 }
2260 else
2261 {
560e09e9 2262 bfd_boolean warned;
ffb2e45b 2263
b2a8e766
AM		 2264 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2265 r_symndx, symtab_hdr, sym_hashes,
2266 h, sec, relocation,
2267 unresolved_reloc, warned);
252b5132
RH		 2268 }
2269
2270 switch (r_type)
2271 {
2272 case R_386_GOT32:
2273 /* Relocation is to the entry for this symbol in the global
2274 offset table. */
ffb2e45b
AM		 2275 if (htab->sgot == NULL)
2276 abort ();
252b5132
RH		 2277
2278 if (h != NULL)
2279 {
b34976b6 2280 bfd_boolean dyn;
252b5132
RH		 2281
2282 off = h->got.offset;
ebe50bae 2283 dyn = htab->elf.dynamic_sections_created;
26e41594 2284 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
252b5132 2285 || (info->shared
586119b3 2286 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 2287 || (ELF_ST_VISIBILITY (h->other)
2288 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2289 {
2290 /* This is actually a static link, or it is a
2291 -Bsymbolic link and the symbol is defined
2292 locally, or the symbol was forced to be local
2293 because of a version file. We must initialize
2294 this entry in the global offset table. Since the
2295 offset must always be a multiple of 4, we use the
2296 least significant bit to record whether we have
2297 initialized it already.
2298
2299 When doing a dynamic link, we create a .rel.got
2300 relocation entry to initialize the value. This
2301 is done in the finish_dynamic_symbol routine. */
2302 if ((off & 1) != 0)
2303 off &= ~1;
2304 else
2305 {
2306 bfd_put_32 (output_bfd, relocation,
6725bdbf 2307 htab->sgot->contents + off);
252b5132
RH		 2308 h->got.offset |= 1;
2309 }
2310 }
8c694914 2311 else
b34976b6 2312 unresolved_reloc = FALSE;
252b5132
RH		 2313 }
2314 else
2315 {
ffb2e45b
AM		 2316 if (local_got_offsets == NULL)
2317 abort ();
252b5132
RH		 2318
2319 off = local_got_offsets[r_symndx];
2320
2321 /* The offset must always be a multiple of 4. We use
83be169b
AM		 2322 the least significant bit to record whether we have
2323 already generated the necessary reloc. */
252b5132
RH		 2324 if ((off & 1) != 0)
2325 off &= ~1;
2326 else
2327 {
6725bdbf
AM		 2328 bfd_put_32 (output_bfd, relocation,
2329 htab->sgot->contents + off);
252b5132
RH		 2330
2331 if (info->shared)
2332 {
947216bf
AM		 2333 asection *s;
2334 Elf_Internal_Rela outrel;
2335 bfd_byte *loc;
252b5132 2336
947216bf
AM		 2337 s = htab->srelgot;
2338 if (s == NULL)
ffb2e45b 2339 abort ();
252b5132 2340
6725bdbf
AM		 2341 outrel.r_offset = (htab->sgot->output_section->vma
2342 + htab->sgot->output_offset
252b5132
RH		 2343 + off);
2344 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
947216bf
AM		 2345 loc = s->contents;
2346 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 2347 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132
RH		 2348 }
2349
2350 local_got_offsets[r_symndx] |= 1;
2351 }
252b5132
RH		 2352 }
2353
ffb2e45b
AM		 2354 if (off >= (bfd_vma) -2)
2355 abort ();
2356
8c37241b
JJ		 2357 relocation = htab->sgot->output_section->vma
2358 + htab->sgot->output_offset + off
2359 - htab->sgotplt->output_section->vma
2360 - htab->sgotplt->output_offset;
252b5132
RH		 2361 break;
2362
2363 case R_386_GOTOFF:
2364 /* Relocation is relative to the start of the global offset
2365 table. */
2366
90f487df
L		 2367 /* Check to make sure it isn't a protected function symbol
2368 for shared library since it may not be local when used
2369 as function address. */
2370 if (info->shared
8fe76924 2371 && !info->executable
90f487df
L		 2372 && h
2373 && h->def_regular
2374 && h->type == STT_FUNC
2375 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2376 {
2377 (*_bfd_error_handler)
2378 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2379 input_bfd, h->root.root.string);
2380 bfd_set_error (bfd_error_bad_value);
2381 return FALSE;
2382 }
2383
8c37241b
JJ		 2384 /* Note that sgot is not involved in this
2385 calculation. We always want the start of .got.plt. If we
2386 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 2387 permitted by the ABI, we might have to change this
2388 calculation. */
8c37241b
JJ		 2389 relocation -= htab->sgotplt->output_section->vma
2390 + htab->sgotplt->output_offset;
252b5132
RH		 2391 break;
2392
2393 case R_386_GOTPC:
2394 /* Use global offset table as symbol value. */
8c37241b
JJ		 2395 relocation = htab->sgotplt->output_section->vma
2396 + htab->sgotplt->output_offset;
b34976b6 2397 unresolved_reloc = FALSE;
252b5132
RH		 2398 break;
2399
2400 case R_386_PLT32:
2401 /* Relocation is to the entry for this symbol in the
2402 procedure linkage table. */
2403
dd5724d5 2404 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 2405 without using the procedure linkage table. */
252b5132
RH		 2406 if (h == NULL)
2407 break;
2408
dd5724d5 2409 if (h->plt.offset == (bfd_vma) -1
6725bdbf 2410 || htab->splt == NULL)
252b5132
RH		 2411 {
2412 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 2413 happens when statically linking PIC code, or when
2414 using -Bsymbolic. */
252b5132
RH		 2415 break;
2416 }
2417
6725bdbf
AM		 2418 relocation = (htab->splt->output_section->vma
2419 + htab->splt->output_offset
252b5132 2420 + h->plt.offset);
b34976b6 2421 unresolved_reloc = FALSE;
252b5132
RH		 2422 break;
2423
2424 case R_386_32:
2425 case R_386_PC32:
ec338859
AM		 2426 /* r_symndx will be zero only for relocs against symbols
2427 from removed linkonce sections, or sections discarded by
2428 a linker script. */
f855931b
AM		 2429 if (r_symndx == 0)
2430 {
2431 /* Zero the section contents. eh_frame generated by old
2432 versions of gcc isn't edited by elf-eh-frame.c, so
2433 FDEs for discarded linkonce functions might remain.
2434 Putting zeros here will zero such FDE's address range.
2435 This is a hint to unwinders and other consumers of
2436 exception handling info that the FDE is invalid. */
2437 bfd_put_32 (input_bfd, 0, contents + rel->r_offset);
3e95eabc 2438 break;
f855931b
AM		 2439 }
2440
2441 if ((input_section->flags & SEC_ALLOC) == 0)
ec338859
AM		 2442 break;
2443
12d0ee4a 2444 if ((info->shared
ef5aade5
L		 2445 && (h == NULL
2446 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2447 || h->root.type != bfd_link_hash_undefweak)
12d0ee4a 2448 && (r_type != R_386_PC32
f6c52c13 2449 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845
AM		 2450 || (ELIMINATE_COPY_RELOCS
2451 && !info->shared
12d0ee4a
AM		 2452 && h != NULL
2453 && h->dynindx != -1
f5385ebf
AM		 2454 && !h->non_got_ref
2455 && ((h->def_dynamic
2456 && !h->def_regular)
28d0b90e
AM		 2457 || h->root.type == bfd_link_hash_undefweak
2458 || h->root.type == bfd_link_hash_undefined)))
252b5132 2459 {
947216bf
AM		 2460 Elf_Internal_Rela outrel;
2461 bfd_byte *loc;
b34976b6 2462 bfd_boolean skip, relocate;
0c715baa 2463 asection *sreloc;
252b5132
RH		 2464
2465 /* When generating a shared object, these relocations
2466 are copied into the output file to be resolved at run
2467 time. */
2468
b34976b6
AM		 2469 skip = FALSE;
2470 relocate = FALSE;
252b5132 2471
c629eae0
JJ		 2472 outrel.r_offset =
2473 _bfd_elf_section_offset (output_bfd, info, input_section,
2474 rel->r_offset);
2475 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2476 skip = TRUE;
0bb2d96a 2477 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2478 skip = TRUE, relocate = TRUE;
252b5132
RH		 2479 outrel.r_offset += (input_section->output_section->vma
2480 + input_section->output_offset);
2481
2482 if (skip)
0bb2d96a 2483 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 2484 else if (h != NULL
2485 && h->dynindx != -1
2486 && (r_type == R_386_PC32
2487 || !info->shared
2488 || !info->symbolic
f5385ebf 2489 || !h->def_regular))
0bb2d96a 2490 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2491 else
2492 {
5a15f56f 2493 /* This symbol is local, or marked to become local. */
b34976b6 2494 relocate = TRUE;
5a15f56f 2495 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 2496 }
2497
0c715baa
AM		 2498 sreloc = elf_section_data (input_section)->sreloc;
2499 if (sreloc == NULL)
2500 abort ();
2501
947216bf
AM		 2502 loc = sreloc->contents;
2503 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
0c715baa 2504 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132
RH		 2505
2506 /* If this reloc is against an external symbol, we do
2507 not want to fiddle with the addend. Otherwise, we
2508 need to include the symbol value so that it becomes
2509 an addend for the dynamic reloc. */
2510 if (! relocate)
2511 continue;
2512 }
252b5132
RH		 2513 break;
2514
37e55690
JJ		 2515 case R_386_TLS_IE:
2516 if (info->shared)
2517 {
947216bf
AM		 2518 Elf_Internal_Rela outrel;
2519 bfd_byte *loc;
37e55690 2520 asection *sreloc;
37e55690
JJ		 2521
2522 outrel.r_offset = rel->r_offset
2523 + input_section->output_section->vma
2524 + input_section->output_offset;
2525 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2526 sreloc = elf_section_data (input_section)->sreloc;
2527 if (sreloc == NULL)
2528 abort ();
947216bf
AM		 2529 loc = sreloc->contents;
2530 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
37e55690
JJ		 2531 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2532 }
2533 /* Fall through */
2534
13ae64f3
JJ		 2535 case R_386_TLS_GD:
2536 case R_386_TLS_IE_32:
37e55690 2537 case R_386_TLS_GOTIE:
13ae64f3
JJ		 2538 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
2539 tls_type = GOT_UNKNOWN;
2540 if (h == NULL && local_got_offsets)
2541 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2542 else if (h != NULL)
2543 {
2544 tls_type = elf_i386_hash_entry(h)->tls_type;
37e55690 2545 if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE))
13ae64f3
JJ		 2546 r_type = R_386_TLS_LE_32;
2547 }
37e55690
JJ		 2548 if (tls_type == GOT_TLS_IE)
2549 tls_type = GOT_TLS_IE_NEG;
2550 if (r_type == R_386_TLS_GD)
2551 {
2552 if (tls_type == GOT_TLS_IE_POS)
2553 r_type = R_386_TLS_GOTIE;
2554 else if (tls_type & GOT_TLS_IE)
2555 r_type = R_386_TLS_IE_32;
2556 }
13ae64f3
JJ		 2557
2558 if (r_type == R_386_TLS_LE_32)
2559 {
82e51918 2560 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 2561 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2562 {
2563 unsigned int val, type;
2564 bfd_vma roff;
2565
2566 /* GD->LE transition. */
2567 BFD_ASSERT (rel->r_offset >= 2);
2568 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2569 BFD_ASSERT (type == 0x8d || type == 0x04);
eea6121a 2570 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
13ae64f3
JJ		 2571 BFD_ASSERT (bfd_get_8 (input_bfd,
2572 contents + rel->r_offset + 4)
2573 == 0xe8);
2574 BFD_ASSERT (rel + 1 < relend);
2575 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2576 roff = rel->r_offset + 5;
2577 val = bfd_get_8 (input_bfd,
2578 contents + rel->r_offset - 1);
2579 if (type == 0x04)
2580 {
2581 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2582 Change it into:
2583 movl %gs:0, %eax; subl $foo@tpoff, %eax
2584 (6 byte form of subl). */
2585 BFD_ASSERT (rel->r_offset >= 3);
2586 BFD_ASSERT (bfd_get_8 (input_bfd,
2587 contents + rel->r_offset - 3)
2588 == 0x8d);
2589 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2590 memcpy (contents + rel->r_offset - 3,
2591 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2592 }
2593 else
2594 {
2595 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
eea6121a 2596 if (rel->r_offset + 10 <= input_section->size
13ae64f3
JJ		 2597 && bfd_get_8 (input_bfd,
2598 contents + rel->r_offset + 9) == 0x90)
2599 {
2600 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2601 Change it into:
2602 movl %gs:0, %eax; subl $foo@tpoff, %eax
2603 (6 byte form of subl). */
2604 memcpy (contents + rel->r_offset - 2,
2605 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2606 roff = rel->r_offset + 6;
2607 }
2608 else
2609 {
2610 /* leal foo(%reg), %eax; call ___tls_get_addr
2611 Change it into:
2612 movl %gs:0, %eax; subl $foo@tpoff, %eax
2613 (5 byte form of subl). */
2614 memcpy (contents + rel->r_offset - 2,
2615 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2616 }
2617 }
2618 bfd_put_32 (output_bfd, tpoff (info, relocation),
2619 contents + roff);
2620 /* Skip R_386_PLT32. */
2621 rel++;
2622 continue;
2623 }
37e55690 2624 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3
JJ		 2625 {
2626 unsigned int val, type;
2627
2628 /* IE->LE transition:
37e55690
JJ		 2629 Originally it can be one of:
2630 movl foo, %eax
2631 movl foo, %reg
2632 addl foo, %reg
2633 We change it into:
2634 movl $foo, %eax
2635 movl $foo, %reg
2636 addl $foo, %reg. */
2637 BFD_ASSERT (rel->r_offset >= 1);
2638 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
eea6121a 2639 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
37e55690
JJ		 2640 if (val == 0xa1)
2641 {
2642 /* movl foo, %eax. */
55fd94b0
AM		 2643 bfd_put_8 (output_bfd, 0xb8,
2644 contents + rel->r_offset - 1);
37e55690 2645 }
299bf759 2646 else
37e55690 2647 {
299bf759 2648 BFD_ASSERT (rel->r_offset >= 2);
55fd94b0
AM		 2649 type = bfd_get_8 (input_bfd,
2650 contents + rel->r_offset - 2);
299bf759 2651 switch (type)
26e41594 2652 {
299bf759
L		 2653 case 0x8b:
2654 /* movl */
2655 BFD_ASSERT ((val & 0xc7) == 0x05);
2656 bfd_put_8 (output_bfd, 0xc7,
2657 contents + rel->r_offset - 2);
2658 bfd_put_8 (output_bfd,
2659 0xc0 | ((val >> 3) & 7),
2660 contents + rel->r_offset - 1);
2661 break;
2662 case 0x03:
2663 /* addl */
2664 BFD_ASSERT ((val & 0xc7) == 0x05);
2665 bfd_put_8 (output_bfd, 0x81,
2666 contents + rel->r_offset - 2);
2667 bfd_put_8 (output_bfd,
2668 0xc0 | ((val >> 3) & 7),
2669 contents + rel->r_offset - 1);
2670 break;
2671 default:
2672 BFD_FAIL ();
2673 break;
26e41594 2674 }
37e55690 2675 }
37e55690
JJ		 2676 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2677 contents + rel->r_offset);
2678 continue;
2679 }
2680 else
2681 {
2682 unsigned int val, type;
2683
2684 /* {IE_32,GOTIE}->LE transition:
2685 Originally it can be one of:
13ae64f3 2686 subl foo(%reg1), %reg2
13ae64f3 2687 movl foo(%reg1), %reg2
37e55690 2688 addl foo(%reg1), %reg2
13ae64f3
JJ		 2689 We change it into:
2690 subl $foo, %reg2
37e55690
JJ		 2691 movl $foo, %reg2 (6 byte form)
2692 addl $foo, %reg2. */
13ae64f3
JJ		 2693 BFD_ASSERT (rel->r_offset >= 2);
2694 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2695 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
eea6121a 2696 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
37e55690 2697 BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4);
13ae64f3
JJ		 2698 if (type == 0x8b)
2699 {
2700 /* movl */
13ae64f3
JJ		 2701 bfd_put_8 (output_bfd, 0xc7,
2702 contents + rel->r_offset - 2);
2703 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2704 contents + rel->r_offset - 1);
2705 }
2706 else if (type == 0x2b)
2707 {
2708 /* subl */
13ae64f3
JJ		 2709 bfd_put_8 (output_bfd, 0x81,
2710 contents + rel->r_offset - 2);
2711 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2712 contents + rel->r_offset - 1);
2713 }
37e55690
JJ		 2714 else if (type == 0x03)
2715 {
2716 /* addl */
2717 bfd_put_8 (output_bfd, 0x81,
2718 contents + rel->r_offset - 2);
2719 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2720 contents + rel->r_offset - 1);
2721 }
13ae64f3
JJ		 2722 else
2723 BFD_FAIL ();
37e55690
JJ		 2724 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
2725 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2726 contents + rel->r_offset);
2727 else
2728 bfd_put_32 (output_bfd, tpoff (info, relocation),
2729 contents + rel->r_offset);
13ae64f3
JJ		 2730 continue;
2731 }
2732 }
2733
2734 if (htab->sgot == NULL)
2735 abort ();
2736
2737 if (h != NULL)
2738 off = h->got.offset;
2739 else
2740 {
2741 if (local_got_offsets == NULL)
2742 abort ();
2743
2744 off = local_got_offsets[r_symndx];
2745 }
2746
2747 if ((off & 1) != 0)
2748 off &= ~1;
26e41594 2749 else
13ae64f3 2750 {
947216bf
AM		 2751 Elf_Internal_Rela outrel;
2752 bfd_byte *loc;
13ae64f3
JJ		 2753 int dr_type, indx;
2754
2755 if (htab->srelgot == NULL)
2756 abort ();
2757
2758 outrel.r_offset = (htab->sgot->output_section->vma
2759 + htab->sgot->output_offset + off);
2760
13ae64f3
JJ		 2761 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2762 if (r_type == R_386_TLS_GD)
2763 dr_type = R_386_TLS_DTPMOD32;
37e55690
JJ		 2764 else if (tls_type == GOT_TLS_IE_POS)
2765 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 2766 else
2767 dr_type = R_386_TLS_TPOFF32;
37e55690
JJ		 2768 if (dr_type == R_386_TLS_TPOFF && indx == 0)
2769 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
2770 htab->sgot->contents + off);
2771 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
c5c1f40c 2772 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
c366c25e
JJ		 2773 htab->sgot->contents + off);
2774 else
2775 bfd_put_32 (output_bfd, 0,
2776 htab->sgot->contents + off);
13ae64f3 2777 outrel.r_info = ELF32_R_INFO (indx, dr_type);
947216bf
AM		 2778 loc = htab->srelgot->contents;
2779 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
13ae64f3
JJ		 2780 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2781
2782 if (r_type == R_386_TLS_GD)
2783 {
2784 if (indx == 0)
2785 {
82e51918 2786 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 2787 bfd_put_32 (output_bfd,
2788 relocation - dtpoff_base (info),
2789 htab->sgot->contents + off + 4);
2790 }
2791 else
2792 {
2793 bfd_put_32 (output_bfd, 0,
2794 htab->sgot->contents + off + 4);
2795 outrel.r_info = ELF32_R_INFO (indx,
2796 R_386_TLS_DTPOFF32);
2797 outrel.r_offset += 4;
2798 htab->srelgot->reloc_count++;
947216bf
AM		 2799 loc += sizeof (Elf32_External_Rel);
2800 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
13ae64f3
JJ		 2801 }
2802 }
37e55690
JJ		 2803 else if (tls_type == GOT_TLS_IE_BOTH)
2804 {
2805 bfd_put_32 (output_bfd,
2806 indx == 0 ? relocation - dtpoff_base (info) : 0,
2807 htab->sgot->contents + off + 4);
2808 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2809 outrel.r_offset += 4;
2810 htab->srelgot->reloc_count++;
947216bf 2811 loc += sizeof (Elf32_External_Rel);
37e55690
JJ		 2812 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2813 }
13ae64f3
JJ		 2814
2815 if (h != NULL)
2816 h->got.offset |= 1;
2817 else
2818 local_got_offsets[r_symndx] |= 1;
2819 }
2820
2821 if (off >= (bfd_vma) -2)
2822 abort ();
2823 if (r_type == ELF32_R_TYPE (rel->r_info))
2824 {
8c37241b
JJ		 2825 bfd_vma g_o_t = htab->sgotplt->output_section->vma
2826 + htab->sgotplt->output_offset;
2827 relocation = htab->sgot->output_section->vma
2828 + htab->sgot->output_offset + off - g_o_t;
37e55690
JJ		 2829 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
2830 && tls_type == GOT_TLS_IE_BOTH)
2831 relocation += 4;
2832 if (r_type == R_386_TLS_IE)
8c37241b 2833 relocation += g_o_t;
b34976b6 2834 unresolved_reloc = FALSE;
13ae64f3
JJ		 2835 }
2836 else
2837 {
2838 unsigned int val, type;
2839 bfd_vma roff;
2840
2841 /* GD->IE transition. */
2842 BFD_ASSERT (rel->r_offset >= 2);
2843 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2844 BFD_ASSERT (type == 0x8d || type == 0x04);
eea6121a 2845 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
13ae64f3
JJ		 2846 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2847 == 0xe8);
2848 BFD_ASSERT (rel + 1 < relend);
2849 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2850 roff = rel->r_offset - 3;
2851 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2852 if (type == 0x04)
2853 {
2854 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2855 Change it into:
2856 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2857 BFD_ASSERT (rel->r_offset >= 3);
2858 BFD_ASSERT (bfd_get_8 (input_bfd,
2859 contents + rel->r_offset - 3)
2860 == 0x8d);
2861 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2862 val >>= 3;
2863 }
2864 else
2865 {
2866 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2867 Change it into:
2868 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
eea6121a 2869 BFD_ASSERT (rel->r_offset + 10 <= input_section->size);
13ae64f3
JJ		 2870 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2871 BFD_ASSERT (bfd_get_8 (input_bfd,
2872 contents + rel->r_offset + 9)
2873 == 0x90);
2874 roff = rel->r_offset - 2;
2875 }
2876 memcpy (contents + roff,
2877 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
2878 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 2879 /* If foo is used only with foo@gotntpoff(%reg) and
2880 foo@indntpoff, but not with foo@gottpoff(%reg), change
2881 subl $foo@gottpoff(%reg), %eax
2882 into:
2883 addl $foo@gotntpoff(%reg), %eax. */
2884 if (r_type == R_386_TLS_GOTIE)
2885 {
2886 contents[roff + 6] = 0x03;
2887 if (tls_type == GOT_TLS_IE_BOTH)
2888 off += 4;
2889 }
8c37241b
JJ		 2890 bfd_put_32 (output_bfd,
2891 htab->sgot->output_section->vma
2892 + htab->sgot->output_offset + off
2893 - htab->sgotplt->output_section->vma
2894 - htab->sgotplt->output_offset,
13ae64f3
JJ		 2895 contents + roff + 8);
2896 /* Skip R_386_PLT32. */
2897 rel++;
2898 continue;
2899 }
2900 break;
2901
2902 case R_386_TLS_LDM:
2903 if (! info->shared)
2904 {
2905 unsigned int val;
2906
2907 /* LD->LE transition:
2908 Ensure it is:
2909 leal foo(%reg), %eax; call ___tls_get_addr.
2910 We change it into:
2911 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
2912 BFD_ASSERT (rel->r_offset >= 2);
2913 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
2914 == 0x8d);
2915 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2916 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
eea6121a 2917 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
13ae64f3
JJ		 2918 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2919 == 0xe8);
2920 BFD_ASSERT (rel + 1 < relend);
2921 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2922 memcpy (contents + rel->r_offset - 2,
2923 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
2924 /* Skip R_386_PLT32. */
2925 rel++;
2926 continue;
2927 }
2928
2929 if (htab->sgot == NULL)
2930 abort ();
2931
2932 off = htab->tls_ldm_got.offset;
2933 if (off & 1)
2934 off &= ~1;
2935 else
2936 {
947216bf
AM		 2937 Elf_Internal_Rela outrel;
2938 bfd_byte *loc;
13ae64f3
JJ		 2939
2940 if (htab->srelgot == NULL)
2941 abort ();
2942
2943 outrel.r_offset = (htab->sgot->output_section->vma
2944 + htab->sgot->output_offset + off);
2945
2946 bfd_put_32 (output_bfd, 0,
2947 htab->sgot->contents + off);
2948 bfd_put_32 (output_bfd, 0,
2949 htab->sgot->contents + off + 4);
2950 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
947216bf
AM		 2951 loc = htab->srelgot->contents;
2952 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
13ae64f3
JJ		 2953 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2954 htab->tls_ldm_got.offset |= 1;
2955 }
8c37241b
JJ		 2956 relocation = htab->sgot->output_section->vma
2957 + htab->sgot->output_offset + off
2958 - htab->sgotplt->output_section->vma
2959 - htab->sgotplt->output_offset;
b34976b6 2960 unresolved_reloc = FALSE;
13ae64f3
JJ		 2961 break;
2962
2963 case R_386_TLS_LDO_32:
a45bb67d 2964 if (info->shared || (input_section->flags & SEC_CODE) == 0)
13ae64f3
JJ		 2965 relocation -= dtpoff_base (info);
2966 else
2967 /* When converting LDO to LE, we must negate. */
2968 relocation = -tpoff (info, relocation);
2969 break;
2970
2971 case R_386_TLS_LE_32:
13ae64f3 2972 case R_386_TLS_LE:
37e55690
JJ		 2973 if (info->shared)
2974 {
947216bf 2975 Elf_Internal_Rela outrel;
37e55690 2976 asection *sreloc;
947216bf 2977 bfd_byte *loc;
37e55690
JJ		 2978 int indx;
2979
2980 outrel.r_offset = rel->r_offset
2981 + input_section->output_section->vma
2982 + input_section->output_offset;
2983 if (h != NULL && h->dynindx != -1)
2984 indx = h->dynindx;
2985 else
2986 indx = 0;
2987 if (r_type == R_386_TLS_LE_32)
2988 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
2989 else
2990 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2991 sreloc = elf_section_data (input_section)->sreloc;
2992 if (sreloc == NULL)
2993 abort ();
947216bf
AM		 2994 loc = sreloc->contents;
2995 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
37e55690
JJ		 2996 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2997 if (indx)
2998 continue;
2999 else if (r_type == R_386_TLS_LE_32)
3000 relocation = dtpoff_base (info) - relocation;
3001 else
3002 relocation -= dtpoff_base (info);
3003 }
3004 else if (r_type == R_386_TLS_LE_32)
3005 relocation = tpoff (info, relocation);
3006 else
3007 relocation = -tpoff (info, relocation);
13ae64f3
JJ		 3008 break;
3009
252b5132
RH		 3010 default:
3011 break;
3012 }
3013
239e1f3a
AM		 3014 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3015 because such sections are not SEC_ALLOC and thus ld.so will
3016 not process them. */
8c694914 3017 if (unresolved_reloc
239e1f3a 3018 && !((input_section->flags & SEC_DEBUGGING) != 0
f5385ebf 3019 && h->def_dynamic))
6a30718d
JJ		 3020 {
3021 (*_bfd_error_handler)
d003868e
AM		 3022 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3023 input_bfd,
3024 input_section,
6a30718d
JJ		 3025 (long) rel->r_offset,
3026 h->root.root.string);
b34976b6 3027 return FALSE;
6a30718d 3028 }
83be169b 3029
252b5132
RH		 3030 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3031 contents, rel->r_offset,
55fd94b0 3032 relocation, 0);
252b5132 3033
cf5c0c5b 3034 if (r != bfd_reloc_ok)
252b5132 3035 {
cf5c0c5b 3036 const char *name;
ffb2e45b 3037
cf5c0c5b
AM		 3038 if (h != NULL)
3039 name = h->root.root.string;
3040 else
3041 {
3042 name = bfd_elf_string_from_elf_section (input_bfd,
3043 symtab_hdr->sh_link,
3044 sym->st_name);
3045 if (name == NULL)
b34976b6 3046 return FALSE;
cf5c0c5b
AM		 3047 if (*name == '\0')
3048 name = bfd_section_name (input_bfd, sec);
3049 }
ffb2e45b 3050
cf5c0c5b
AM		 3051 if (r == bfd_reloc_overflow)
3052 {
cf5c0c5b 3053 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 3054 (info, (h ? &h->root : NULL), name, howto->name,
3055 (bfd_vma) 0, input_bfd, input_section,
3056 rel->r_offset)))
b34976b6 3057 return FALSE;
cf5c0c5b
AM		 3058 }
3059 else
3060 {
3061 (*_bfd_error_handler)
d003868e
AM		 3062 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3063 input_bfd, input_section,
cf5c0c5b 3064 (long) rel->r_offset, name, (int) r);
b34976b6 3065 return FALSE;
cf5c0c5b 3066 }
252b5132
RH		 3067 }
3068 }
3069
b34976b6 3070 return TRUE;
252b5132
RH		 3071}
3072
3073/* Finish up dynamic symbol handling. We set the contents of various
3074 dynamic sections here. */
3075
b34976b6 3076static bfd_boolean
55fd94b0
AM		 3077elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3078 struct bfd_link_info *info,
3079 struct elf_link_hash_entry *h,
3080 Elf_Internal_Sym *sym)
252b5132 3081{
6725bdbf 3082 struct elf_i386_link_hash_table *htab;
252b5132 3083
6725bdbf 3084 htab = elf_i386_hash_table (info);
252b5132
RH		 3085
3086 if (h->plt.offset != (bfd_vma) -1)
3087 {
252b5132
RH		 3088 bfd_vma plt_index;
3089 bfd_vma got_offset;
947216bf
AM		 3090 Elf_Internal_Rela rel;
3091 bfd_byte *loc;
252b5132
RH		 3092
3093 /* This symbol has an entry in the procedure linkage table. Set
3094 it up. */
3095
ffb2e45b
AM		 3096 if (h->dynindx == -1
3097 || htab->splt == NULL
3098 || htab->sgotplt == NULL
3099 || htab->srelplt == NULL)
3100 abort ();
252b5132
RH		 3101
3102 /* Get the index in the procedure linkage table which
3103 corresponds to this symbol. This is the index of this symbol
3104 in all the symbols for which we are making plt entries. The
3105 first entry in the procedure linkage table is reserved. */
3106 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3107
3108 /* Get the offset into the .got table of the entry that
3109 corresponds to this function. Each .got entry is 4 bytes.
3110 The first three are reserved. */
3111 got_offset = (plt_index + 3) * 4;
3112
3113 /* Fill in the entry in the procedure linkage table. */
3114 if (! info->shared)
3115 {
6725bdbf 3116 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
252b5132
RH		 3117 PLT_ENTRY_SIZE);
3118 bfd_put_32 (output_bfd,
6725bdbf
AM		 3119 (htab->sgotplt->output_section->vma
3120 + htab->sgotplt->output_offset
252b5132 3121 + got_offset),
6725bdbf 3122 htab->splt->contents + h->plt.offset + 2);
eac338cf
PB		 3123
3124 if (htab->is_vxworks)
3125 {
3126 int s, k, reloc_index;
3127
3128 /* Create the R_386_32 relocation referencing the GOT
3129 for this PLT entry. */
3130
3131 /* S: Current slot number (zero-based). */
3132 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3133 /* K: Number of relocations for PLTResolve. */
3134 if (info->shared)
3135 k = PLTRESOLVE_RELOCS_SHLIB;
3136 else
3137 k = PLTRESOLVE_RELOCS;
3138 /* Skip the PLTresolve relocations, and the relocations for
3139 the other PLT slots. */
3140 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3141 loc = (htab->srelplt2->contents + reloc_index
3142 * sizeof (Elf32_External_Rel));
3143
3144 rel.r_offset = (htab->splt->output_section->vma
3145 + htab->splt->output_offset
3146 + h->plt.offset + 2),
3147 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_386_32);
3148 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3149
3150 /* Create the R_386_32 relocation referencing the beginning of
3151 the PLT for this GOT entry. */
3152 rel.r_offset = (htab->sgotplt->output_section->vma
3153 + htab->sgotplt->output_offset
3154 + got_offset);
3155 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_386_32);
3156 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3157 loc + sizeof (Elf32_External_Rel));
3158 }
3159
252b5132
RH		 3160 }
3161 else
3162 {
6725bdbf 3163 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
252b5132
RH		 3164 PLT_ENTRY_SIZE);
3165 bfd_put_32 (output_bfd, got_offset,
6725bdbf 3166 htab->splt->contents + h->plt.offset + 2);
252b5132
RH		 3167 }
3168
3169 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
6725bdbf 3170 htab->splt->contents + h->plt.offset + 7);
252b5132 3171 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
6725bdbf 3172 htab->splt->contents + h->plt.offset + 12);
252b5132
RH		 3173
3174 /* Fill in the entry in the global offset table. */
3175 bfd_put_32 (output_bfd,
6725bdbf
AM		 3176 (htab->splt->output_section->vma
3177 + htab->splt->output_offset
252b5132
RH		 3178 + h->plt.offset
3179 + 6),
6725bdbf 3180 htab->sgotplt->contents + got_offset);
252b5132
RH		 3181
3182 /* Fill in the entry in the .rel.plt section. */
6725bdbf
AM		 3183 rel.r_offset = (htab->sgotplt->output_section->vma
3184 + htab->sgotplt->output_offset
252b5132
RH		 3185 + got_offset);
3186 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
947216bf 3187 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
0ac8d2ca 3188 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132 3189
f5385ebf 3190 if (!h->def_regular)
252b5132
RH		 3191 {
3192 /* Mark the symbol as undefined, rather than as defined in
c6585bbb
JJ		 3193 the .plt section. Leave the value if there were any
3194 relocations where pointer equality matters (this is a clue
51b64d56
AM		 3195 for the dynamic linker, to make function pointer
3196 comparisons work between an application and shared
c6585bbb
JJ		 3197 library), otherwise set it to zero. If a function is only
3198 called from a binary, there is no need to slow down
3199 shared libraries because of that. */
252b5132 3200 sym->st_shndx = SHN_UNDEF;
f5385ebf 3201 if (!h->pointer_equality_needed)
c6585bbb 3202 sym->st_value = 0;
252b5132
RH		 3203 }
3204 }
3205
13ae64f3
JJ		 3206 if (h->got.offset != (bfd_vma) -1
3207 && elf_i386_hash_entry(h)->tls_type != GOT_TLS_GD
37e55690 3208 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
252b5132 3209 {
947216bf
AM		 3210 Elf_Internal_Rela rel;
3211 bfd_byte *loc;
252b5132
RH		 3212
3213 /* This symbol has an entry in the global offset table. Set it
3214 up. */
3215
ffb2e45b
AM		 3216 if (htab->sgot == NULL || htab->srelgot == NULL)
3217 abort ();
252b5132 3218
6725bdbf
AM		 3219 rel.r_offset = (htab->sgot->output_section->vma
3220 + htab->sgot->output_offset
dc810e39 3221 + (h->got.offset & ~(bfd_vma) 1));
252b5132 3222
dd5724d5
AM		 3223 /* If this is a static link, or it is a -Bsymbolic link and the
3224 symbol is defined locally or was forced to be local because
3225 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 3226 The entry in the global offset table will already have been
3227 initialized in the relocate_section function. */
6725bdbf 3228 if (info->shared
586119b3 3229 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 3230 {
6725bdbf 3231 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 3232 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3233 }
252b5132
RH		 3234 else
3235 {
dd5724d5 3236 BFD_ASSERT((h->got.offset & 1) == 0);
6725bdbf
AM		 3237 bfd_put_32 (output_bfd, (bfd_vma) 0,
3238 htab->sgot->contents + h->got.offset);
252b5132
RH		 3239 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3240 }
3241
947216bf
AM		 3242 loc = htab->srelgot->contents;
3243 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 3244 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 3245 }
3246
f5385ebf 3247 if (h->needs_copy)
252b5132 3248 {
947216bf
AM		 3249 Elf_Internal_Rela rel;
3250 bfd_byte *loc;
252b5132
RH		 3251
3252 /* This symbol needs a copy reloc. Set it up. */
3253
ffb2e45b
AM		 3254 if (h->dynindx == -1
3255 || (h->root.type != bfd_link_hash_defined
3256 && h->root.type != bfd_link_hash_defweak)
3257 || htab->srelbss == NULL)
3258 abort ();
252b5132
RH		 3259
3260 rel.r_offset = (h->root.u.def.value
3261 + h->root.u.def.section->output_section->vma
3262 + h->root.u.def.section->output_offset);
3263 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
947216bf
AM		 3264 loc = htab->srelbss->contents;
3265 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 3266 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 3267 }
3268
eac338cf
PB		 3269 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3270 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3271 is relative to the ".got" section. */
252b5132 3272 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
eac338cf
PB		 3273 || (strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3274 && !htab->is_vxworks))
252b5132
RH		 3275 sym->st_shndx = SHN_ABS;
3276
b34976b6 3277 return TRUE;
252b5132
RH		 3278}
3279
38701953
AM		 3280/* Used to decide how to sort relocs in an optimal manner for the
3281 dynamic linker, before writing them out. */
3282
3283static enum elf_reloc_type_class
55fd94b0 3284elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
38701953 3285{
55fd94b0 3286 switch (ELF32_R_TYPE (rela->r_info))
38701953
AM		 3287 {
3288 case R_386_RELATIVE:
3289 return reloc_class_relative;
3290 case R_386_JUMP_SLOT:
3291 return reloc_class_plt;
3292 case R_386_COPY:
3293 return reloc_class_copy;
3294 default:
3295 return reloc_class_normal;
3296 }
3297}
3298
252b5132
RH		 3299/* Finish up the dynamic sections. */
3300
b34976b6 3301static bfd_boolean
55fd94b0
AM		 3302elf_i386_finish_dynamic_sections (bfd *output_bfd,
3303 struct bfd_link_info *info)
252b5132 3304{
6725bdbf 3305 struct elf_i386_link_hash_table *htab;
252b5132 3306 bfd *dynobj;
252b5132
RH		 3307 asection *sdyn;
3308
6725bdbf 3309 htab = elf_i386_hash_table (info);
ebe50bae 3310 dynobj = htab->elf.dynobj;
252b5132
RH		 3311 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3312
ebe50bae 3313 if (htab->elf.dynamic_sections_created)
252b5132 3314 {
252b5132
RH		 3315 Elf32_External_Dyn *dyncon, *dynconend;
3316
ffb2e45b
AM		 3317 if (sdyn == NULL || htab->sgot == NULL)
3318 abort ();
252b5132
RH		 3319
3320 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 3321 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 3322 for (; dyncon < dynconend; dyncon++)
3323 {
3324 Elf_Internal_Dyn dyn;
51b64d56 3325 asection *s;
252b5132
RH		 3326
3327 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3328
3329 switch (dyn.d_tag)
3330 {
3331 default:
0ac8d2ca 3332 continue;
252b5132
RH		 3333
3334 case DT_PLTGOT:
8c37241b
JJ		 3335 s = htab->sgotplt;
3336 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 3337 break;
3338
252b5132 3339 case DT_JMPREL:
6348e046
AM		 3340 s = htab->srelplt;
3341 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 3342 break;
3343
3344 case DT_PLTRELSZ:
6348e046 3345 s = htab->srelplt;
eea6121a 3346 dyn.d_un.d_val = s->size;
252b5132
RH		 3347 break;
3348
3349 case DT_RELSZ:
3350 /* My reading of the SVR4 ABI indicates that the
3351 procedure linkage table relocs (DT_JMPREL) should be
3352 included in the overall relocs (DT_REL). This is
3353 what Solaris does. However, UnixWare can not handle
3354 that case. Therefore, we override the DT_RELSZ entry
6348e046
AM		 3355 here to make it not include the JMPREL relocs. */
3356 s = htab->srelplt;
3357 if (s == NULL)
3358 continue;
eea6121a 3359 dyn.d_un.d_val -= s->size;
6348e046
AM		 3360 break;
3361
3362 case DT_REL:
3363 /* We may not be using the standard ELF linker script.
3364 If .rel.plt is the first .rel section, we adjust
3365 DT_REL to not include it. */
3366 s = htab->srelplt;
3367 if (s == NULL)
3368 continue;
3369 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3370 continue;
eea6121a 3371 dyn.d_un.d_ptr += s->size;
252b5132
RH		 3372 break;
3373 }
0ac8d2ca
AM		 3374
3375 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 3376 }
3377
3378 /* Fill in the first entry in the procedure linkage table. */
eea6121a 3379 if (htab->splt && htab->splt->size > 0)
252b5132
RH		 3380 {
3381 if (info->shared)
eac338cf
PB		 3382 {
3383 memcpy (htab->splt->contents, elf_i386_pic_plt0_entry,
3384 sizeof (elf_i386_pic_plt0_entry));
3385 memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry),
3386 htab->plt0_pad_byte,
3387 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
3388 }
252b5132
RH		 3389 else
3390 {
eac338cf
PB		 3391 memcpy (htab->splt->contents, elf_i386_plt0_entry,
3392 sizeof(elf_i386_plt0_entry));
3393 memset (htab->splt->contents + sizeof (elf_i386_plt0_entry),
3394 htab->plt0_pad_byte,
3395 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
252b5132 3396 bfd_put_32 (output_bfd,
6725bdbf
AM		 3397 (htab->sgotplt->output_section->vma
3398 + htab->sgotplt->output_offset
3399 + 4),
3400 htab->splt->contents + 2);
252b5132 3401 bfd_put_32 (output_bfd,
6725bdbf
AM		 3402 (htab->sgotplt->output_section->vma
3403 + htab->sgotplt->output_offset
3404 + 8),
3405 htab->splt->contents + 8);
eac338cf
PB		 3406
3407 if (htab->is_vxworks)
3408 {
3409 Elf_Internal_Rela rel;
3410 struct elf_link_hash_entry *hgot;
3411
3412 /* The VxWorks GOT is relocated by the dynamic linker.
3413 Therefore, we must emit relocations rather than
3414 simply computing the values now. */
3415 hgot = elf_link_hash_lookup (elf_hash_table (info),
3416 "_GLOBAL_OFFSET_TABLE_",
3417 FALSE, FALSE, FALSE);
3418 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3419 On IA32 we use REL relocations so the addend goes in
3420 the PLT directly. */
3421 rel.r_offset = (htab->splt->output_section->vma
3422 + htab->splt->output_offset
3423 + 2);
3424 rel.r_info = ELF32_R_INFO (hgot->indx, R_386_32);
3425 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3426 htab->srelplt2->contents);
3427 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3428 rel.r_offset = (htab->splt->output_section->vma
3429 + htab->splt->output_offset
3430 + 8);
3431 rel.r_info = ELF32_R_INFO (hgot->indx, R_386_32);
3432 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3433 htab->srelplt2->contents +
3434 sizeof (Elf32_External_Rel));
3435 }
252b5132
RH		 3436 }
3437
3438 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3439 really seem like the right value. */
6725bdbf
AM		 3440 elf_section_data (htab->splt->output_section)
3441 ->this_hdr.sh_entsize = 4;
eac338cf
PB		 3442
3443 /* Correct the .rel.plt.unloaded relocations. */
3444 if (htab->is_vxworks && !info->shared)
3445 {
3446 int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1;
4c9b0de6 3447 unsigned char *p;
eac338cf
PB		 3448
3449 p = htab->srelplt2->contents;
3450 if (info->shared)
3451 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
3452 else
3453 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
3454
3455 for (; num_plts; num_plts--)
3456 {
3457 Elf_Internal_Rela rel;
3458 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3459 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_386_32);
3460 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3461 p += sizeof (Elf32_External_Rel);
3462
3463 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3464 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_386_32);
3465 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3466 p += sizeof (Elf32_External_Rel);
3467 }
3468 }
252b5132
RH		 3469 }
3470 }
3471
12d0ee4a 3472 if (htab->sgotplt)
252b5132 3473 {
12d0ee4a 3474 /* Fill in the first three entries in the global offset table. */
eea6121a 3475 if (htab->sgotplt->size > 0)
12d0ee4a
AM		 3476 {
3477 bfd_put_32 (output_bfd,
55fd94b0 3478 (sdyn == NULL ? 0
12d0ee4a
AM		 3479 : sdyn->output_section->vma + sdyn->output_offset),
3480 htab->sgotplt->contents);
55fd94b0
AM		 3481 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3482 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
12d0ee4a 3483 }
252b5132 3484
12d0ee4a
AM		 3485 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3486 }
8c37241b 3487
eea6121a 3488 if (htab->sgot && htab->sgot->size > 0)
8c37241b
JJ		 3489 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3490
b34976b6 3491 return TRUE;
252b5132
RH		 3492}
3493
4c45e5c9
JJ		 3494/* Return address for Ith PLT stub in section PLT, for relocation REL
3495 or (bfd_vma) -1 if it should not be included. */
3496
3497static bfd_vma
3498elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
3499 const arelent *rel ATTRIBUTE_UNUSED)
3500{
3501 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
3502}
3503
3504
252b5132
RH		 3505#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3506#define TARGET_LITTLE_NAME "elf32-i386"
3507#define ELF_ARCH bfd_arch_i386
3508#define ELF_MACHINE_CODE EM_386
3509#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 3510
3511#define elf_backend_can_gc_sections 1
51b64d56 3512#define elf_backend_can_refcount 1
252b5132
RH		 3513#define elf_backend_want_got_plt 1
3514#define elf_backend_plt_readonly 1
3515#define elf_backend_want_plt_sym 0
3516#define elf_backend_got_header_size 12
252b5132 3517
8c29f035
AM		 3518/* Support RELA for objdump of prelink objects. */
3519#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 3520#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3521
13ae64f3 3522#define bfd_elf32_mkobject elf_i386_mkobject
13ae64f3 3523
dd5724d5
AM		 3524#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3525#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3526#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3527
3528#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3529#define elf_backend_check_relocs elf_i386_check_relocs
0ac8d2ca 3530#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6725bdbf 3531#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
0ac8d2ca 3532#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 3533#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3534#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3535#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3536#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
c5fccbec
DJ		 3537#define elf_backend_grok_prstatus elf_i386_grok_prstatus
3538#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 3539#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 3540#define elf_backend_relocate_section elf_i386_relocate_section
3541#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4c45e5c9 3542#define elf_backend_plt_sym_val elf_i386_plt_sym_val
dd5724d5 3543
252b5132 3544#include "elf32-target.h"
2bc3c89a
AM		 3545
3546/* FreeBSD support. */
3547
3548#undef TARGET_LITTLE_SYM
3549#define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3550#undef TARGET_LITTLE_NAME
3551#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3552
3553/* The kernel recognizes executables as valid only if they carry a
3554 "FreeBSD" label in the ELF header. So we put this label on all
3555 executables and (for simplicity) also all other object files. */
3556
2bc3c89a 3557static void
55fd94b0
AM		 3558elf_i386_post_process_headers (bfd *abfd,
3559 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2bc3c89a
AM		 3560{
3561 Elf_Internal_Ehdr *i_ehdrp;
3562
3563 i_ehdrp = elf_elfheader (abfd);
3564
3565 /* Put an ABI label supported by FreeBSD >= 4.1. */
3566 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
3567#ifdef OLD_FREEBSD_ABI_LABEL
3568 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3569 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
caf47ea6 3570#endif
2bc3c89a
AM		 3571}
3572
3573#undef elf_backend_post_process_headers
571fe01f
NC		 3574#define elf_backend_post_process_headers elf_i386_post_process_headers
3575#undef elf32_bed
3576#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a
AM		 3577
3578#include "elf32-target.h"
eac338cf
PB		 3579
3580/* VxWorks support. */
3581
3582#undef TARGET_LITTLE_SYM
3583#define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3584#undef TARGET_LITTLE_NAME
3585#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3586
3587
3588/* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3589
3590static struct bfd_link_hash_table *
3591elf_i386_vxworks_link_hash_table_create (bfd *abfd)
3592{
3593 struct bfd_link_hash_table *ret;
3594 struct elf_i386_link_hash_table *htab;
3595
3596 ret = elf_i386_link_hash_table_create (abfd);
3597 if (ret)
3598 {
3599 htab = (struct elf_i386_link_hash_table *) ret;
3600 htab->is_vxworks = 1;
3601 htab->plt0_pad_byte = 0x90;
3602 }
3603
3604 return ret;
3605}
3606
3607
3608/* Tweak magic VxWorks symbols as they are written to the output file. */
3609static bfd_boolean
3610elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
3611 ATTRIBUTE_UNUSED,
3612 const char *name,
3613 Elf_Internal_Sym *sym,
3614 asection *input_sec ATTRIBUTE_UNUSED,
3615 struct elf_link_hash_entry *h
3616 ATTRIBUTE_UNUSED)
3617{
3618 /* Ignore the first dummy symbol. */
3619 if (!name)
3620 return TRUE;
3621
3622 return elf_vxworks_link_output_symbol_hook (name, sym);
3623}
3624
3625#undef elf_backend_post_process_headers
3626#undef bfd_elf32_bfd_link_hash_table_create
3627#define bfd_elf32_bfd_link_hash_table_create \
3628 elf_i386_vxworks_link_hash_table_create
3629#undef elf_backend_add_symbol_hook
3630#define elf_backend_add_symbol_hook \
3631 elf_vxworks_add_symbol_hook
3632#undef elf_backend_link_output_symbol_hook
3633#define elf_backend_link_output_symbol_hook \
3634 elf_i386_vxworks_link_output_symbol_hook
3635#undef elf_backend_emit_relocs
3636#define elf_backend_emit_relocs elf_vxworks_emit_relocs
3637#undef elf_backend_final_write_processing
3638#define elf_backend_final_write_processing \
3639 elf_vxworks_final_write_processing
3640
3641/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
3642 define it. */
3643#undef elf_backend_want_plt_sym
3644#define elf_backend_want_plt_sym 1
3645
3646#undef elf32_bed
3647#define elf32_bed elf32_i386_vxworks_bed
3648
3649#include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.526071 seconds and 4 git commands to generate.