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* hppa.h: Update copyright dates.
[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 97 TRUE, 0xffff, 0xffff, FALSE),
ac2aa337 98 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_signed,
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;
9635fe29 605
eac338cf
PB		 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;
9635fe29 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
71cb9464
L		 914 {
915 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
916 while (h->root.type == bfd_link_hash_indirect
917 || h->root.type == bfd_link_hash_warning)
918 h = (struct elf_link_hash_entry *) h->root.u.i.link;
919 }
252b5132 920
13ae64f3
JJ		 921 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
922
923 switch (r_type)
252b5132 924 {
37e55690
JJ		 925 case R_386_TLS_LDM:
926 htab->tls_ldm_got.refcount += 1;
927 goto create_got;
928
929 case R_386_PLT32:
930 /* This symbol requires a procedure linkage table entry. We
931 actually build the entry in adjust_dynamic_symbol,
932 because this might be a case of linking PIC code which is
933 never referenced by a dynamic object, in which case we
934 don't need to generate a procedure linkage table entry
935 after all. */
936
937 /* If this is a local symbol, we resolve it directly without
938 creating a procedure linkage table entry. */
939 if (h == NULL)
940 continue;
941
f5385ebf 942 h->needs_plt = 1;
37e55690
JJ		 943 h->plt.refcount += 1;
944 break;
945
13ae64f3 946 case R_386_TLS_IE_32:
37e55690
JJ		 947 case R_386_TLS_IE:
948 case R_386_TLS_GOTIE:
13ae64f3
JJ		 949 if (info->shared)
950 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 951 /* Fall through */
952
252b5132 953 case R_386_GOT32:
13ae64f3 954 case R_386_TLS_GD:
252b5132 955 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 956 {
957 int tls_type, old_tls_type;
958
959 switch (r_type)
960 {
961 default:
962 case R_386_GOT32: tls_type = GOT_NORMAL; break;
963 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
37e55690
JJ		 964 case R_386_TLS_IE_32:
965 if (ELF32_R_TYPE (rel->r_info) == r_type)
966 tls_type = GOT_TLS_IE_NEG;
967 else
968 /* If this is a GD->IE transition, we may use either of
969 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
970 tls_type = GOT_TLS_IE;
971 break;
972 case R_386_TLS_IE:
973 case R_386_TLS_GOTIE:
974 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 975 }
976
977 if (h != NULL)
978 {
979 h->got.refcount += 1;
980 old_tls_type = elf_i386_hash_entry(h)->tls_type;
981 }
982 else
983 {
984 bfd_signed_vma *local_got_refcounts;
985
986 /* This is a global offset table entry for a local symbol. */
987 local_got_refcounts = elf_local_got_refcounts (abfd);
988 if (local_got_refcounts == NULL)
989 {
990 bfd_size_type size;
991
992 size = symtab_hdr->sh_info;
993 size *= (sizeof (bfd_signed_vma) + sizeof(char));
55fd94b0 994 local_got_refcounts = bfd_zalloc (abfd, size);
13ae64f3 995 if (local_got_refcounts == NULL)
b34976b6 996 return FALSE;
13ae64f3
JJ		 997 elf_local_got_refcounts (abfd) = local_got_refcounts;
998 elf_i386_local_got_tls_type (abfd)
999 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1000 }
1001 local_got_refcounts[r_symndx] += 1;
1002 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1003 }
1004
37e55690
JJ		 1005 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1006 tls_type |= old_tls_type;
13ae64f3
JJ		 1007 /* If a TLS symbol is accessed using IE at least once,
1008 there is no point to use dynamic model for it. */
37e55690
JJ		 1009 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1010 && (old_tls_type != GOT_TLS_GD
1011 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1012 {
37e55690
JJ		 1013 if ((old_tls_type & GOT_TLS_IE) && tls_type == GOT_TLS_GD)
1014 tls_type = old_tls_type;
13ae64f3
JJ		 1015 else
1016 {
1017 (*_bfd_error_handler)
d003868e 1018 (_("%B: `%s' accessed both as normal and "
55fd94b0 1019 "thread local symbol"),
d003868e 1020 abfd,
37e55690 1021 h ? h->root.root.string : "<local>");
b34976b6 1022 return FALSE;
13ae64f3
JJ		 1023 }
1024 }
1025
1026 if (old_tls_type != tls_type)
1027 {
1028 if (h != NULL)
1029 elf_i386_hash_entry (h)->tls_type = tls_type;
1030 else
1031 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1032 }
1033 }
0ac8d2ca
AM		 1034 /* Fall through */
1035
1036 case R_386_GOTOFF:
1037 case R_386_GOTPC:
13ae64f3 1038 create_got:
0ac8d2ca
AM		 1039 if (htab->sgot == NULL)
1040 {
1041 if (htab->elf.dynobj == NULL)
1042 htab->elf.dynobj = abfd;
1043 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 1044 return FALSE;
0ac8d2ca 1045 }
37e55690
JJ		 1046 if (r_type != R_386_TLS_IE)
1047 break;
1048 /* Fall through */
252b5132 1049
37e55690
JJ		 1050 case R_386_TLS_LE_32:
1051 case R_386_TLS_LE:
1052 if (!info->shared)
1053 break;
bffbf940 1054 info->flags |= DF_STATIC_TLS;
b34976b6 1055 /* Fall through */
252b5132
RH		 1056
1057 case R_386_32:
1058 case R_386_PC32:
12d0ee4a 1059 if (h != NULL && !info->shared)
6725bdbf 1060 {
12d0ee4a 1061 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1062 need a copy reloc. We can't check reliably at this
1063 stage whether the section is read-only, as input
1064 sections have not yet been mapped to output sections.
1065 Tentatively set the flag for now, and correct in
1066 adjust_dynamic_symbol. */
f5385ebf 1067 h->non_got_ref = 1;
12d0ee4a
AM		 1068
1069 /* We may need a .plt entry if the function this reloc
1070 refers to is in a shared lib. */
51b64d56 1071 h->plt.refcount += 1;
c6585bbb 1072 if (r_type != R_386_PC32)
f5385ebf 1073 h->pointer_equality_needed = 1;
6725bdbf 1074 }
7843f00e 1075
252b5132 1076 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1077 against a global symbol, or a non PC relative reloc
1078 against a local symbol, then we need to copy the reloc
1079 into the shared library. However, if we are linking with
1080 -Bsymbolic, we do not need to copy a reloc against a
1081 global symbol which is defined in an object we are
1082 including in the link (i.e., DEF_REGULAR is set). At
1083 this point we have not seen all the input files, so it is
1084 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1085 later (it is never cleared). In case of a weak definition,
1086 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1087 a shared library. We account for that possibility below by
1f655a09
L		 1088 storing information in the relocs_copied field of the hash
1089 table entry. A similar situation occurs when creating
1090 shared libraries and symbol visibility changes render the
12d0ee4a 1091 symbol local.
56882138 1092
12d0ee4a
AM		 1093 If on the other hand, we are creating an executable, we
1094 may need to keep relocations for symbols satisfied by a
1095 dynamic library if we manage to avoid copy relocs for the
1096 symbol. */
1097 if ((info->shared
1098 && (sec->flags & SEC_ALLOC) != 0
13ae64f3 1099 && (r_type != R_386_PC32
12d0ee4a
AM		 1100 || (h != NULL
1101 && (! info->symbolic
1102 || h->root.type == bfd_link_hash_defweak
f5385ebf 1103 || !h->def_regular))))
a23b6845
AM		 1104 || (ELIMINATE_COPY_RELOCS
1105 && !info->shared
12d0ee4a
AM		 1106 && (sec->flags & SEC_ALLOC) != 0
1107 && h != NULL
12d0ee4a 1108 && (h->root.type == bfd_link_hash_defweak
f5385ebf 1109 || !h->def_regular)))
252b5132 1110 {
ec338859
AM		 1111 struct elf_i386_dyn_relocs *p;
1112 struct elf_i386_dyn_relocs **head;
1113
12d0ee4a
AM		 1114 /* We must copy these reloc types into the output file.
1115 Create a reloc section in dynobj and make room for
1116 this reloc. */
252b5132
RH		 1117 if (sreloc == NULL)
1118 {
1119 const char *name;
0ac8d2ca 1120 bfd *dynobj;
e92d460e
AM		 1121 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1122 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
252b5132 1123
e92d460e 1124 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
252b5132 1125 if (name == NULL)
b34976b6 1126 return FALSE;
252b5132 1127
c8492176
L		 1128 if (strncmp (name, ".rel", 4) != 0
1129 || strcmp (bfd_get_section_name (abfd, sec),
1130 name + 4) != 0)
1131 {
0c715baa 1132 (*_bfd_error_handler)
d003868e
AM		 1133 (_("%B: bad relocation section name `%s\'"),
1134 abfd, name);
f5f31454 1135 }
252b5132 1136
0ac8d2ca
AM		 1137 if (htab->elf.dynobj == NULL)
1138 htab->elf.dynobj = abfd;
1139
1140 dynobj = htab->elf.dynobj;
252b5132
RH		 1141 sreloc = bfd_get_section_by_name (dynobj, name);
1142 if (sreloc == NULL)
1143 {
1144 flagword flags;
1145
252b5132
RH		 1146 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1147 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1148 if ((sec->flags & SEC_ALLOC) != 0)
1149 flags |= SEC_ALLOC | SEC_LOAD;
3496cb2a
L		 1150 sreloc = bfd_make_section_with_flags (dynobj,
1151 name,
1152 flags);
252b5132 1153 if (sreloc == NULL
252b5132 1154 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
b34976b6 1155 return FALSE;
252b5132 1156 }
0c715baa 1157 elf_section_data (sec)->sreloc = sreloc;
252b5132
RH		 1158 }
1159
0c715baa
AM		 1160 /* If this is a global symbol, we count the number of
1161 relocations we need for this symbol. */
1162 if (h != NULL)
252b5132 1163 {
ec338859 1164 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
0c715baa
AM		 1165 }
1166 else
1167 {
ec338859
AM		 1168 /* Track dynamic relocs needed for local syms too.
1169 We really need local syms available to do this
1170 easily. Oh well. */
1171
1172 asection *s;
1173 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1174 sec, r_symndx);
1175 if (s == NULL)
b34976b6 1176 return FALSE;
ec338859
AM		 1177
1178 head = ((struct elf_i386_dyn_relocs **)
1179 &elf_section_data (s)->local_dynrel);
1180 }
1181
1182 p = *head;
1183 if (p == NULL || p->sec != sec)
1184 {
1185 bfd_size_type amt = sizeof *p;
55fd94b0 1186 p = bfd_alloc (htab->elf.dynobj, amt);
ec338859 1187 if (p == NULL)
b34976b6 1188 return FALSE;
ec338859
AM		 1189 p->next = *head;
1190 *head = p;
1191 p->sec = sec;
1192 p->count = 0;
1193 p->pc_count = 0;
252b5132 1194 }
ec338859
AM		 1195
1196 p->count += 1;
13ae64f3 1197 if (r_type == R_386_PC32)
ec338859 1198 p->pc_count += 1;
252b5132 1199 }
252b5132
RH		 1200 break;
1201
1202 /* This relocation describes the C++ object vtable hierarchy.
1203 Reconstruct it for later use during GC. */
1204 case R_386_GNU_VTINHERIT:
c152c796 1205 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 1206 return FALSE;
252b5132
RH		 1207 break;
1208
1209 /* This relocation describes which C++ vtable entries are actually
1210 used. Record for later use during GC. */
1211 case R_386_GNU_VTENTRY:
c152c796 1212 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6 1213 return FALSE;
252b5132
RH		 1214 break;
1215
1216 default:
1217 break;
1218 }
1219 }
1220
b34976b6 1221 return TRUE;
252b5132
RH		 1222}
1223
1224/* Return the section that should be marked against GC for a given
1225 relocation. */
1226
1227static asection *
55fd94b0
AM		 1228elf_i386_gc_mark_hook (asection *sec,
1229 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1230 Elf_Internal_Rela *rel,
1231 struct elf_link_hash_entry *h,
1232 Elf_Internal_Sym *sym)
252b5132
RH		 1233{
1234 if (h != NULL)
1235 {
1236 switch (ELF32_R_TYPE (rel->r_info))
1237 {
1238 case R_386_GNU_VTINHERIT:
1239 case R_386_GNU_VTENTRY:
1240 break;
1241
1242 default:
1243 switch (h->root.type)
1244 {
1245 case bfd_link_hash_defined:
1246 case bfd_link_hash_defweak:
1247 return h->root.u.def.section;
1248
1249 case bfd_link_hash_common:
1250 return h->root.u.c.p->section;
1251
1252 default:
1253 break;
1254 }
1255 }
1256 }
1257 else
1e2f5b6e 1258 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
252b5132
RH		 1259
1260 return NULL;
1261}
1262
1263/* Update the got entry reference counts for the section being removed. */
1264
b34976b6 1265static bfd_boolean
55fd94b0
AM		 1266elf_i386_gc_sweep_hook (bfd *abfd,
1267 struct bfd_link_info *info,
1268 asection *sec,
1269 const Elf_Internal_Rela *relocs)
252b5132 1270{
dd5724d5
AM		 1271 Elf_Internal_Shdr *symtab_hdr;
1272 struct elf_link_hash_entry **sym_hashes;
1273 bfd_signed_vma *local_got_refcounts;
1274 const Elf_Internal_Rela *rel, *relend;
dd5724d5 1275
ec338859 1276 elf_section_data (sec)->local_dynrel = NULL;
dd5724d5 1277
6725bdbf
AM		 1278 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1279 sym_hashes = elf_sym_hashes (abfd);
1280 local_got_refcounts = elf_local_got_refcounts (abfd);
dd5724d5
AM		 1281
1282 relend = relocs + sec->reloc_count;
1283 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 1284 {
1285 unsigned long r_symndx;
1286 unsigned int r_type;
1287 struct elf_link_hash_entry *h = NULL;
37e55690 1288
26e41594
AM		 1289 r_symndx = ELF32_R_SYM (rel->r_info);
1290 if (r_symndx >= symtab_hdr->sh_info)
1291 {
1292 struct elf_i386_link_hash_entry *eh;
1293 struct elf_i386_dyn_relocs **pp;
1294 struct elf_i386_dyn_relocs *p;
dd5724d5 1295
26e41594 1296 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 1297 while (h->root.type == bfd_link_hash_indirect
1298 || h->root.type == bfd_link_hash_warning)
1299 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 1300 eh = (struct elf_i386_link_hash_entry *) h;
0c715baa 1301
26e41594
AM		 1302 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1303 if (p->sec == sec)
1304 {
1305 /* Everything must go for SEC. */
1306 *pp = p->next;
1307 break;
1308 }
1309 }
0c715baa 1310
26e41594
AM		 1311 r_type = ELF32_R_TYPE (rel->r_info);
1312 r_type = elf_i386_tls_transition (info, r_type, h != NULL);
1313 switch (r_type)
1314 {
1315 case R_386_TLS_LDM:
1316 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1317 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1318 break;
0c715baa 1319
26e41594
AM		 1320 case R_386_TLS_GD:
1321 case R_386_TLS_IE_32:
1322 case R_386_TLS_IE:
1323 case R_386_TLS_GOTIE:
1324 case R_386_GOT32:
1325 if (h != NULL)
1326 {
1327 if (h->got.refcount > 0)
1328 h->got.refcount -= 1;
1329 }
1330 else if (local_got_refcounts != NULL)
1331 {
1332 if (local_got_refcounts[r_symndx] > 0)
1333 local_got_refcounts[r_symndx] -= 1;
1334 }
1335 break;
0c715baa 1336
26e41594
AM		 1337 case R_386_32:
1338 case R_386_PC32:
1339 if (info->shared)
1340 break;
1341 /* Fall through */
6725bdbf 1342
26e41594
AM		 1343 case R_386_PLT32:
1344 if (h != NULL)
1345 {
1346 if (h->plt.refcount > 0)
1347 h->plt.refcount -= 1;
1348 }
1349 break;
dd5724d5 1350
26e41594
AM		 1351 default:
1352 break;
1353 }
1354 }
252b5132 1355
b34976b6 1356 return TRUE;
252b5132
RH		 1357}
1358
1359/* Adjust a symbol defined by a dynamic object and referenced by a
1360 regular object. The current definition is in some section of the
1361 dynamic object, but we're not including those sections. We have to
1362 change the definition to something the rest of the link can
1363 understand. */
1364
b34976b6 1365static bfd_boolean
55fd94b0
AM		 1366elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1367 struct elf_link_hash_entry *h)
252b5132 1368{
6725bdbf 1369 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1370 asection *s;
1371 unsigned int power_of_two;
1372
252b5132
RH		 1373 /* If this is a function, put it in the procedure linkage table. We
1374 will fill in the contents of the procedure linkage table later,
1375 when we know the address of the .got section. */
1376 if (h->type == STT_FUNC
f5385ebf 1377 || h->needs_plt)
252b5132 1378 {
6725bdbf 1379 if (h->plt.refcount <= 0
9c7a29a3
AM		 1380 || SYMBOL_CALLS_LOCAL (info, h)
1381 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1382 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 1383 {
1384 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM		 1385 file, but the symbol was never referred to by a dynamic
1386 object, or if all references were garbage collected. In
1387 such a case, we don't actually need to build a procedure
1388 linkage table, and we can just do a PC32 reloc instead. */
bbd7ec4a 1389 h->plt.offset = (bfd_vma) -1;
f5385ebf 1390 h->needs_plt = 0;
252b5132
RH		 1391 }
1392
b34976b6 1393 return TRUE;
252b5132 1394 }
6725bdbf
AM		 1395 else
1396 /* It's possible that we incorrectly decided a .plt reloc was
1397 needed for an R_386_PC32 reloc to a non-function sym in
1398 check_relocs. We can't decide accurately between function and
1399 non-function syms in check-relocs; Objects loaded later in
1400 the link may change h->type. So fix it now. */
bbd7ec4a 1401 h->plt.offset = (bfd_vma) -1;
252b5132
RH		 1402
1403 /* If this is a weak symbol, and there is a real definition, the
1404 processor independent code will have arranged for us to see the
1405 real definition first, and we can just use the same value. */
f6e332e6 1406 if (h->u.weakdef != NULL)
252b5132 1407 {
f6e332e6
AM		 1408 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1409 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1410 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1411 h->root.u.def.value = h->u.weakdef->root.u.def.value;
a23b6845 1412 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 1413 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 1414 return TRUE;
252b5132
RH		 1415 }
1416
1417 /* This is a reference to a symbol defined by a dynamic object which
1418 is not a function. */
1419
1420 /* If we are creating a shared library, we must presume that the
1421 only references to the symbol are via the global offset table.
1422 For such cases we need not do anything here; the relocations will
1423 be handled correctly by relocate_section. */
1424 if (info->shared)
b34976b6 1425 return TRUE;
252b5132 1426
7843f00e
ILT		 1427 /* If there are no references to this symbol that do not use the
1428 GOT, we don't need to generate a copy reloc. */
f5385ebf 1429 if (!h->non_got_ref)
b34976b6 1430 return TRUE;
7843f00e 1431
8bd621d8
AM		 1432 /* If -z nocopyreloc was given, we won't generate them either. */
1433 if (info->nocopyreloc)
1434 {
f5385ebf 1435 h->non_got_ref = 0;
b34976b6 1436 return TRUE;
8bd621d8
AM		 1437 }
1438
643796e3
DJ		 1439 htab = elf_i386_hash_table (info);
1440
1441 /* If there aren't any dynamic relocs in read-only sections, then
1442 we can keep the dynamic relocs and avoid the copy reloc. This
1443 doesn't work on VxWorks, where we can not have dynamic relocations
1444 (other than copy and jump slot relocations) in an executable. */
1445 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
ebe50bae 1446 {
a23b6845
AM		 1447 struct elf_i386_link_hash_entry * eh;
1448 struct elf_i386_dyn_relocs *p;
ebe50bae 1449
a23b6845
AM		 1450 eh = (struct elf_i386_link_hash_entry *) h;
1451 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1452 {
1453 s = p->sec->output_section;
1454 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1455 break;
1456 }
1457
a23b6845
AM		 1458 if (p == NULL)
1459 {
f5385ebf 1460 h->non_got_ref = 0;
a23b6845
AM		 1461 return TRUE;
1462 }
ebe50bae
AM		 1463 }
1464
252b5132
RH		 1465 /* We must allocate the symbol in our .dynbss section, which will
1466 become part of the .bss section of the executable. There will be
1467 an entry for this symbol in the .dynsym section. The dynamic
1468 object will contain position independent code, so all references
1469 from the dynamic object to this symbol will go through the global
1470 offset table. The dynamic linker will use the .dynsym entry to
1471 determine the address it must put in the global offset table, so
1472 both the dynamic object and the regular object will refer to the
1473 same memory location for the variable. */
1474
252b5132
RH		 1475 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1476 copy the initial value out of the dynamic object and into the
0ac8d2ca 1477 runtime process image. */
252b5132
RH		 1478 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1479 {
eea6121a 1480 htab->srelbss->size += sizeof (Elf32_External_Rel);
f5385ebf 1481 h->needs_copy = 1;
252b5132
RH		 1482 }
1483
1484 /* We need to figure out the alignment required for this symbol. I
1485 have no idea how ELF linkers handle this. */
1486 power_of_two = bfd_log2 (h->size);
1487 if (power_of_two > 3)
1488 power_of_two = 3;
1489
1490 /* Apply the required alignment. */
0ac8d2ca 1491 s = htab->sdynbss;
eea6121a 1492 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
0ac8d2ca 1493 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
252b5132 1494 {
0ac8d2ca 1495 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
b34976b6 1496 return FALSE;
252b5132
RH		 1497 }
1498
1499 /* Define the symbol as being at this point in the section. */
1500 h->root.u.def.section = s;
eea6121a 1501 h->root.u.def.value = s->size;
252b5132
RH		 1502
1503 /* Increment the section size to make room for the symbol. */
eea6121a 1504 s->size += h->size;
252b5132 1505
b34976b6 1506 return TRUE;
252b5132
RH		 1507}
1508
6725bdbf 1509/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 1510 dynamic relocs. */
6725bdbf 1511
b34976b6 1512static bfd_boolean
55fd94b0 1513allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 1514{
1515 struct bfd_link_info *info;
1516 struct elf_i386_link_hash_table *htab;
5a15f56f 1517 struct elf_i386_link_hash_entry *eh;
0c715baa 1518 struct elf_i386_dyn_relocs *p;
6725bdbf 1519
e92d460e 1520 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1521 return TRUE;
6725bdbf 1522
e92d460e
AM		 1523 if (h->root.type == bfd_link_hash_warning)
1524 /* When warning symbols are created, they **replace** the "real"
1525 entry in the hash table, thus we never get to see the real
1526 symbol in a hash traversal. So look at it now. */
1527 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1528
6725bdbf
AM		 1529 info = (struct bfd_link_info *) inf;
1530 htab = elf_i386_hash_table (info);
1531
ebe50bae 1532 if (htab->elf.dynamic_sections_created
9c7a29a3 1533 && h->plt.refcount > 0)
6725bdbf 1534 {
5a15f56f
AM		 1535 /* Make sure this symbol is output as a dynamic symbol.
1536 Undefined weak syms won't yet be marked as dynamic. */
1537 if (h->dynindx == -1
f5385ebf 1538 && !h->forced_local)
5a15f56f 1539 {
c152c796 1540 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1541 return FALSE;
5a15f56f
AM		 1542 }
1543
4e795f50
AM		 1544 if (info->shared
1545 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 1546 {
0ac8d2ca 1547 asection *s = htab->splt;
6725bdbf 1548
ced53ee5
AM		 1549 /* If this is the first .plt entry, make room for the special
1550 first entry. */
eea6121a
AM		 1551 if (s->size == 0)
1552 s->size += PLT_ENTRY_SIZE;
6725bdbf 1553
eea6121a 1554 h->plt.offset = s->size;
6725bdbf 1555
ced53ee5
AM		 1556 /* If this symbol is not defined in a regular file, and we are
1557 not generating a shared library, then set the symbol to this
1558 location in the .plt. This is required to make function
1559 pointers compare as equal between the normal executable and
1560 the shared library. */
1561 if (! info->shared
f5385ebf 1562 && !h->def_regular)
ced53ee5
AM		 1563 {
1564 h->root.u.def.section = s;
1565 h->root.u.def.value = h->plt.offset;
1566 }
6725bdbf 1567
ced53ee5 1568 /* Make room for this entry. */
eea6121a 1569 s->size += PLT_ENTRY_SIZE;
6725bdbf 1570
ced53ee5
AM		 1571 /* We also need to make an entry in the .got.plt section, which
1572 will be placed in the .got section by the linker script. */
eea6121a 1573 htab->sgotplt->size += 4;
6725bdbf 1574
6725bdbf 1575 /* We also need to make an entry in the .rel.plt section. */
eea6121a 1576 htab->srelplt->size += sizeof (Elf32_External_Rel);
eac338cf
PB		 1577
1578 if (htab->is_vxworks && !info->shared)
1579 {
1580 /* VxWorks has a second set of relocations for each PLT entry
1581 in executables. They go in a separate relocation section,
1582 which is processed by the kernel loader. */
1583
1584 /* There are two relocations for the initial PLT entry: an
1585 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1586 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1587
1588 if (h->plt.offset == PLT_ENTRY_SIZE)
1589 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1590
1591 /* There are two extra relocations for each subsequent PLT entry:
1592 an R_386_32 relocation for the GOT entry, and an R_386_32
1593 relocation for the PLT entry. */
1594
1595 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1596 }
6725bdbf 1597 }
ced53ee5
AM		 1598 else
1599 {
51b64d56 1600 h->plt.offset = (bfd_vma) -1;
f5385ebf 1601 h->needs_plt = 0;
ced53ee5 1602 }
6725bdbf
AM		 1603 }
1604 else
1605 {
51b64d56 1606 h->plt.offset = (bfd_vma) -1;
f5385ebf 1607 h->needs_plt = 0;
6725bdbf
AM		 1608 }
1609
37e55690 1610 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 1611 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1612 if (h->got.refcount > 0
1613 && !info->shared
1614 && h->dynindx == -1
37e55690 1615 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
cedb70c5 1616 h->got.offset = (bfd_vma) -1;
13ae64f3 1617 else if (h->got.refcount > 0)
6725bdbf 1618 {
0ac8d2ca 1619 asection *s;
b34976b6 1620 bfd_boolean dyn;
13ae64f3 1621 int tls_type = elf_i386_hash_entry(h)->tls_type;
6725bdbf 1622
5a15f56f
AM		 1623 /* Make sure this symbol is output as a dynamic symbol.
1624 Undefined weak syms won't yet be marked as dynamic. */
1625 if (h->dynindx == -1
f5385ebf 1626 && !h->forced_local)
5a15f56f 1627 {
c152c796 1628 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1629 return FALSE;
5a15f56f
AM		 1630 }
1631
6725bdbf 1632 s = htab->sgot;
eea6121a
AM		 1633 h->got.offset = s->size;
1634 s->size += 4;
13ae64f3 1635 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
37e55690 1636 if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE_BOTH)
eea6121a 1637 s->size += 4;
ebe50bae 1638 dyn = htab->elf.dynamic_sections_created;
13ae64f3 1639 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 1640 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1641 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1642 need two), R_386_TLS_GD needs one if local symbol and two if
1643 global. */
1644 if (tls_type == GOT_TLS_IE_BOTH)
eea6121a 1645 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
37e55690
JJ		 1646 else if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1647 || (tls_type & GOT_TLS_IE))
eea6121a 1648 htab->srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3 1649 else if (tls_type == GOT_TLS_GD)
eea6121a 1650 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
ef5aade5
L		 1651 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1652 || h->root.type != bfd_link_hash_undefweak)
1653 && (info->shared
1654 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
eea6121a 1655 htab->srelgot->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 1656 }
1657 else
51b64d56 1658 h->got.offset = (bfd_vma) -1;
6725bdbf 1659
5a15f56f
AM		 1660 eh = (struct elf_i386_link_hash_entry *) h;
1661 if (eh->dyn_relocs == NULL)
b34976b6 1662 return TRUE;
5a15f56f 1663
0c715baa
AM		 1664 /* In the shared -Bsymbolic case, discard space allocated for
1665 dynamic pc-relative relocs against symbols which turn out to be
1666 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 1667 space for pc-relative relocs that have become local due to symbol
1668 visibility changes. */
0c715baa
AM		 1669
1670 if (info->shared)
5a15f56f 1671 {
09695f56
AM		 1672 /* The only reloc that uses pc_count is R_386_PC32, which will
1673 appear on a call or on something like ".long foo - .". We
1674 want calls to protected symbols to resolve directly to the
1675 function rather than going via the plt. If people want
1676 function pointer comparisons to work as expected then they
1677 should avoid writing assembly like ".long foo - .". */
1678 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 1679 {
0c715baa
AM		 1680 struct elf_i386_dyn_relocs **pp;
1681
1682 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1683 {
1684 p->count -= p->pc_count;
1685 p->pc_count = 0;
1686 if (p->count == 0)
1687 *pp = p->next;
1688 else
1689 pp = &p->next;
1690 }
5a15f56f 1691 }
4e795f50
AM		 1692
1693 /* Also discard relocs on undefined weak syms with non-default
1694 visibility. */
1695 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1696 && h->root.type == bfd_link_hash_undefweak)
1697 eh->dyn_relocs = NULL;
0c715baa 1698 }
a23b6845 1699 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 1700 {
1701 /* For the non-shared case, discard space for relocs against
1702 symbols which turn out to need copy relocs or are not
1703 dynamic. */
1704
f5385ebf
AM		 1705 if (!h->non_got_ref
1706 && ((h->def_dynamic
1707 && !h->def_regular)
ebe50bae 1708 || (htab->elf.dynamic_sections_created
0c715baa
AM		 1709 && (h->root.type == bfd_link_hash_undefweak
1710 || h->root.type == bfd_link_hash_undefined))))
1711 {
1712 /* Make sure this symbol is output as a dynamic symbol.
1713 Undefined weak syms won't yet be marked as dynamic. */
1714 if (h->dynindx == -1
f5385ebf 1715 && !h->forced_local)
0c715baa 1716 {
c152c796 1717 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1718 return FALSE;
0c715baa 1719 }
5a15f56f 1720
0c715baa
AM		 1721 /* If that succeeded, we know we'll be keeping all the
1722 relocs. */
1723 if (h->dynindx != -1)
1724 goto keep;
1725 }
1726
1727 eh->dyn_relocs = NULL;
1728
ec338859 1729 keep: ;
5a15f56f
AM		 1730 }
1731
0c715baa
AM		 1732 /* Finally, allocate space. */
1733 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 1734 {
0c715baa 1735 asection *sreloc = elf_section_data (p->sec)->sreloc;
eea6121a 1736 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 1737 }
1738
b34976b6 1739 return TRUE;
6725bdbf
AM		 1740}
1741
0c715baa
AM		 1742/* Find any dynamic relocs that apply to read-only sections. */
1743
b34976b6 1744static bfd_boolean
55fd94b0 1745readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
0c715baa
AM		 1746{
1747 struct elf_i386_link_hash_entry *eh;
1748 struct elf_i386_dyn_relocs *p;
1749
e92d460e
AM		 1750 if (h->root.type == bfd_link_hash_warning)
1751 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1752
0c715baa
AM		 1753 eh = (struct elf_i386_link_hash_entry *) h;
1754 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1755 {
1756 asection *s = p->sec->output_section;
1757
1758 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1759 {
1760 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1761
1762 info->flags |= DF_TEXTREL;
1763
1764 /* Not an error, just cut short the traversal. */
b34976b6 1765 return FALSE;
0c715baa
AM		 1766 }
1767 }
b34976b6 1768 return TRUE;
0c715baa
AM		 1769}
1770
252b5132
RH		 1771/* Set the sizes of the dynamic sections. */
1772
b34976b6 1773static bfd_boolean
55fd94b0
AM		 1774elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1775 struct bfd_link_info *info)
252b5132 1776{
6725bdbf 1777 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1778 bfd *dynobj;
1779 asection *s;
b34976b6 1780 bfd_boolean relocs;
0c715baa 1781 bfd *ibfd;
252b5132 1782
6725bdbf 1783 htab = elf_i386_hash_table (info);
ebe50bae 1784 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 1785 if (dynobj == NULL)
1786 abort ();
252b5132 1787
ebe50bae 1788 if (htab->elf.dynamic_sections_created)
252b5132
RH		 1789 {
1790 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 1791 if (info->executable)
252b5132
RH		 1792 {
1793 s = bfd_get_section_by_name (dynobj, ".interp");
ffb2e45b
AM		 1794 if (s == NULL)
1795 abort ();
eea6121a 1796 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132
RH		 1797 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1798 }
161d71a6 1799 }
6725bdbf 1800
0c715baa
AM		 1801 /* Set up .got offsets for local syms, and space for local dynamic
1802 relocs. */
1803 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
161d71a6
L		 1804 {
1805 bfd_signed_vma *local_got;
1806 bfd_signed_vma *end_local_got;
13ae64f3 1807 char *local_tls_type;
161d71a6
L		 1808 bfd_size_type locsymcount;
1809 Elf_Internal_Shdr *symtab_hdr;
1810 asection *srel;
6725bdbf 1811
0c715baa 1812 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
161d71a6 1813 continue;
6725bdbf 1814
0c715baa
AM		 1815 for (s = ibfd->sections; s != NULL; s = s->next)
1816 {
ec338859 1817 struct elf_i386_dyn_relocs *p;
0c715baa 1818
ec338859
AM		 1819 for (p = *((struct elf_i386_dyn_relocs **)
1820 &elf_section_data (s)->local_dynrel);
1821 p != NULL;
1822 p = p->next)
0c715baa 1823 {
ec338859
AM		 1824 if (!bfd_is_abs_section (p->sec)
1825 && bfd_is_abs_section (p->sec->output_section))
1826 {
1827 /* Input section has been discarded, either because
1828 it is a copy of a linkonce section or due to
1829 linker script /DISCARD/, so we'll be discarding
1830 the relocs too. */
1831 }
248866a8 1832 else if (p->count != 0)
ec338859
AM		 1833 {
1834 srel = elf_section_data (p->sec)->sreloc;
eea6121a 1835 srel->size += p->count * sizeof (Elf32_External_Rel);
248866a8
AM		 1836 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1837 info->flags |= DF_TEXTREL;
ec338859 1838 }
0c715baa
AM		 1839 }
1840 }
1841
1842 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 1843 if (!local_got)
1844 continue;
6725bdbf 1845
0c715baa 1846 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
161d71a6
L		 1847 locsymcount = symtab_hdr->sh_info;
1848 end_local_got = local_got + locsymcount;
13ae64f3 1849 local_tls_type = elf_i386_local_got_tls_type (ibfd);
161d71a6
L		 1850 s = htab->sgot;
1851 srel = htab->srelgot;
13ae64f3 1852 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
161d71a6
L		 1853 {
1854 if (*local_got > 0)
6725bdbf 1855 {
eea6121a
AM		 1856 *local_got = s->size;
1857 s->size += 4;
37e55690
JJ		 1858 if (*local_tls_type == GOT_TLS_GD
1859 || *local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 1860 s->size += 4;
13ae64f3
JJ		 1861 if (info->shared
1862 || *local_tls_type == GOT_TLS_GD
37e55690
JJ		 1863 || (*local_tls_type & GOT_TLS_IE))
1864 {
1865 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 1866 srel->size += 2 * sizeof (Elf32_External_Rel);
37e55690 1867 else
eea6121a 1868 srel->size += sizeof (Elf32_External_Rel);
37e55690 1869 }
6725bdbf 1870 }
161d71a6
L		 1871 else
1872 *local_got = (bfd_vma) -1;
6725bdbf 1873 }
252b5132 1874 }
6725bdbf 1875
13ae64f3
JJ		 1876 if (htab->tls_ldm_got.refcount > 0)
1877 {
1878 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1879 relocs. */
eea6121a
AM		 1880 htab->tls_ldm_got.offset = htab->sgot->size;
1881 htab->sgot->size += 8;
1882 htab->srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 1883 }
1884 else
1885 htab->tls_ldm_got.offset = -1;
1886
eac338cf
PB		 1887 if (htab->is_vxworks)
1888 {
1889 /* Save the GOT and PLT symbols in the hash table for easy access.
1890 Mark them as having relocations; they might not, but we won't
1891 know for sure until we build the GOT in finish_dynamic_symbol. */
1892
1893 htab->hgot = elf_link_hash_lookup (elf_hash_table (info),
1894 "_GLOBAL_OFFSET_TABLE_",
1895 FALSE, FALSE, FALSE);
1896 if (htab->hgot)
1897 htab->hgot->indx = -2;
1898 htab->hplt = elf_link_hash_lookup (elf_hash_table (info),
1899 "_PROCEDURE_LINKAGE_TABLE_",
1900 FALSE, FALSE, FALSE);
1901 if (htab->hplt)
1902 htab->hplt->indx = -2;
1903
1904 if (htab->is_vxworks && htab->hplt && htab->splt->flags & SEC_CODE)
1905 htab->hplt->type = STT_FUNC;
1906 }
1907
0c715baa
AM		 1908 /* Allocate global sym .plt and .got entries, and space for global
1909 sym dynamic relocs. */
ebe50bae 1910 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
252b5132 1911
5a15f56f
AM		 1912 /* We now have determined the sizes of the various dynamic sections.
1913 Allocate memory for them. */
b34976b6 1914 relocs = FALSE;
252b5132
RH		 1915 for (s = dynobj->sections; s != NULL; s = s->next)
1916 {
eac338cf
PB		 1917 bfd_boolean strip_section = TRUE;
1918
252b5132
RH		 1919 if ((s->flags & SEC_LINKER_CREATED) == 0)
1920 continue;
1921
6725bdbf
AM		 1922 if (s == htab->splt
1923 || s == htab->sgot
75ff4589
L		 1924 || s == htab->sgotplt
1925 || s == htab->sdynbss)
252b5132 1926 {
6725bdbf
AM		 1927 /* Strip this section if we don't need it; see the
1928 comment below. */
eac338cf
PB		 1929 /* We'd like to strip these sections if they aren't needed, but if
1930 we've exported dynamic symbols from them we must leave them.
1931 It's too late to tell BFD to get rid of the symbols. */
1932
1933 if (htab->hplt != NULL)
1934 strip_section = FALSE;
252b5132 1935 }
6725bdbf 1936 else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
252b5132 1937 {
eac338cf 1938 if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2)
b34976b6 1939 relocs = TRUE;
252b5132 1940
0ac8d2ca
AM		 1941 /* We use the reloc_count field as a counter if we need
1942 to copy relocs into the output file. */
1943 s->reloc_count = 0;
252b5132 1944 }
6725bdbf 1945 else
252b5132
RH		 1946 {
1947 /* It's not one of our sections, so don't allocate space. */
1948 continue;
1949 }
1950
c456f082 1951 if (s->size == 0)
252b5132 1952 {
0ac8d2ca
AM		 1953 /* If we don't need this section, strip it from the
1954 output file. This is mostly to handle .rel.bss and
1955 .rel.plt. We must create both sections in
1956 create_dynamic_sections, because they must be created
1957 before the linker maps input sections to output
1958 sections. The linker does that before
1959 adjust_dynamic_symbol is called, and it is that
1960 function which decides whether anything needs to go
1961 into these sections. */
c456f082
AM		 1962 if (strip_section)
1963 s->flags |= SEC_EXCLUDE;
252b5132
RH		 1964 continue;
1965 }
1966
c456f082
AM		 1967 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1968 continue;
1969
f69da49f
AM		 1970 /* Allocate memory for the section contents. We use bfd_zalloc
1971 here in case unused entries are not reclaimed before the
1972 section's contents are written out. This should not happen,
1973 but this way if it does, we get a R_386_NONE reloc instead
1974 of garbage. */
eea6121a 1975 s->contents = bfd_zalloc (dynobj, s->size);
6725bdbf 1976 if (s->contents == NULL)
b34976b6 1977 return FALSE;
252b5132
RH		 1978 }
1979
ebe50bae 1980 if (htab->elf.dynamic_sections_created)
252b5132
RH		 1981 {
1982 /* Add some entries to the .dynamic section. We fill in the
1983 values later, in elf_i386_finish_dynamic_sections, but we
1984 must add the entries now so that we get the correct size for
1985 the .dynamic section. The DT_DEBUG entry is filled in by the
1986 dynamic linker and used by the debugger. */
dc810e39 1987#define add_dynamic_entry(TAG, VAL) \
5a580b3a 1988 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 1989
36af4a4e 1990 if (info->executable)
252b5132 1991 {
dc810e39 1992 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 1993 return FALSE;
252b5132
RH		 1994 }
1995
eea6121a 1996 if (htab->splt->size != 0)
252b5132 1997 {
dc810e39
AM		 1998 if (!add_dynamic_entry (DT_PLTGOT, 0)
1999 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2000 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2001 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 2002 return FALSE;
252b5132
RH		 2003 }
2004
2005 if (relocs)
2006 {
dc810e39
AM		 2007 if (!add_dynamic_entry (DT_REL, 0)
2008 || !add_dynamic_entry (DT_RELSZ, 0)
2009 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 2010 return FALSE;
252b5132 2011
0c715baa
AM		 2012 /* If any dynamic relocs apply to a read-only section,
2013 then we need a DT_TEXTREL entry. */
248866a8
AM		 2014 if ((info->flags & DF_TEXTREL) == 0)
2015 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2016 (PTR) info);
0c715baa
AM		 2017
2018 if ((info->flags & DF_TEXTREL) != 0)
2019 {
2020 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2021 return FALSE;
0c715baa 2022 }
252b5132
RH		 2023 }
2024 }
dc810e39 2025#undef add_dynamic_entry
252b5132 2026
b34976b6 2027 return TRUE;
252b5132
RH		 2028}
2029
38701953
AM		 2030/* Set the correct type for an x86 ELF section. We do this by the
2031 section name, which is a hack, but ought to work. */
2032
b34976b6 2033static bfd_boolean
55fd94b0
AM		 2034elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2035 Elf_Internal_Shdr *hdr,
2036 asection *sec)
38701953
AM		 2037{
2038 register const char *name;
2039
2040 name = bfd_get_section_name (abfd, sec);
2041
2042 /* This is an ugly, but unfortunately necessary hack that is
2043 needed when producing EFI binaries on x86. It tells
2044 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2045 containing ELF relocation info. We need this hack in order to
2046 be able to generate ELF binaries that can be translated into
2047 EFI applications (which are essentially COFF objects). Those
2048 files contain a COFF ".reloc" section inside an ELFNN object,
2049 which would normally cause BFD to segfault because it would
2050 attempt to interpret this section as containing relocation
2051 entries for section "oc". With this hack enabled, ".reloc"
2052 will be treated as a normal data section, which will avoid the
2053 segfault. However, you won't be able to create an ELFNN binary
2054 with a section named "oc" that needs relocations, but that's
2055 the kind of ugly side-effects you get when detecting section
2056 types based on their names... In practice, this limitation is
2057 unlikely to bite. */
2058 if (strcmp (name, ".reloc") == 0)
2059 hdr->sh_type = SHT_PROGBITS;
2060
b34976b6 2061 return TRUE;
38701953
AM		 2062}
2063
13ae64f3
JJ		 2064/* Return the base VMA address which should be subtracted from real addresses
2065 when resolving @dtpoff relocation.
2066 This is PT_TLS segment p_vaddr. */
2067
2068static bfd_vma
55fd94b0 2069dtpoff_base (struct bfd_link_info *info)
13ae64f3 2070{
e1918d23
AM		 2071 /* If tls_sec is NULL, we should have signalled an error already. */
2072 if (elf_hash_table (info)->tls_sec == NULL)
6a30718d 2073 return 0;
e1918d23 2074 return elf_hash_table (info)->tls_sec->vma;
13ae64f3
JJ		 2075}
2076
2077/* Return the relocation value for @tpoff relocation
2078 if STT_TLS virtual address is ADDRESS. */
2079
2080static bfd_vma
55fd94b0 2081tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 2082{
e1918d23 2083 struct elf_link_hash_table *htab = elf_hash_table (info);
13ae64f3 2084
e1918d23
AM		 2085 /* If tls_sec is NULL, we should have signalled an error already. */
2086 if (htab->tls_sec == NULL)
6a30718d 2087 return 0;
e1918d23 2088 return htab->tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 2089}
2090
252b5132
RH		 2091/* Relocate an i386 ELF section. */
2092
b34976b6 2093static bfd_boolean
55fd94b0
AM		 2094elf_i386_relocate_section (bfd *output_bfd,
2095 struct bfd_link_info *info,
2096 bfd *input_bfd,
2097 asection *input_section,
2098 bfd_byte *contents,
2099 Elf_Internal_Rela *relocs,
2100 Elf_Internal_Sym *local_syms,
2101 asection **local_sections)
252b5132 2102{
6725bdbf 2103 struct elf_i386_link_hash_table *htab;
252b5132
RH		 2104 Elf_Internal_Shdr *symtab_hdr;
2105 struct elf_link_hash_entry **sym_hashes;
2106 bfd_vma *local_got_offsets;
252b5132
RH		 2107 Elf_Internal_Rela *rel;
2108 Elf_Internal_Rela *relend;
2109
6725bdbf 2110 htab = elf_i386_hash_table (info);
252b5132
RH		 2111 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2112 sym_hashes = elf_sym_hashes (input_bfd);
2113 local_got_offsets = elf_local_got_offsets (input_bfd);
2114
252b5132
RH		 2115 rel = relocs;
2116 relend = relocs + input_section->reloc_count;
2117 for (; rel < relend; rel++)
2118 {
13ae64f3 2119 unsigned int r_type;
252b5132
RH		 2120 reloc_howto_type *howto;
2121 unsigned long r_symndx;
2122 struct elf_link_hash_entry *h;
2123 Elf_Internal_Sym *sym;
2124 asection *sec;
ffb2e45b 2125 bfd_vma off;
252b5132 2126 bfd_vma relocation;
b34976b6 2127 bfd_boolean unresolved_reloc;
252b5132 2128 bfd_reloc_status_type r;
1b452ec6 2129 unsigned int indx;
13ae64f3 2130 int tls_type;
252b5132
RH		 2131
2132 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 2133 if (r_type == R_386_GNU_VTINHERIT
2134 || r_type == R_386_GNU_VTENTRY)
252b5132 2135 continue;
dc47f327 2136
55fd94b0 2137 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 2138 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2139 >= R_386_ext - R_386_standard)
2140 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2141 >= R_386_tls - R_386_ext))
252b5132 2142 {
6ba842b6 2143 (*_bfd_error_handler)
d003868e
AM		 2144 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2145 input_bfd, input_section, r_type);
252b5132 2146 bfd_set_error (bfd_error_bad_value);
b34976b6 2147 return FALSE;
252b5132 2148 }
1b452ec6 2149 howto = elf_howto_table + indx;
252b5132
RH		 2150
2151 r_symndx = ELF32_R_SYM (rel->r_info);
2152
1049f94e 2153 if (info->relocatable)
252b5132 2154 {
4a335f3d 2155 bfd_vma val;
4a335f3d
AM		 2156 bfd_byte *where;
2157
0ac8d2ca 2158 /* This is a relocatable link. We don't have to change
252b5132
RH		 2159 anything, unless the reloc is against a section symbol,
2160 in which case we have to adjust according to where the
2161 section symbol winds up in the output section. */
4a335f3d
AM		 2162 if (r_symndx >= symtab_hdr->sh_info)
2163 continue;
2164
2165 sym = local_syms + r_symndx;
2166 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2167 continue;
2168
2169 sec = local_sections[r_symndx];
2170 val = sec->output_offset;
2171 if (val == 0)
2172 continue;
2173
2174 where = contents + rel->r_offset;
2175 switch (howto->size)
252b5132 2176 {
16a10388 2177 /* FIXME: overflow checks. */
4a335f3d 2178 case 0:
16a10388 2179 val += bfd_get_8 (input_bfd, where);
4a335f3d 2180 bfd_put_8 (input_bfd, val, where);
4a335f3d
AM		 2181 break;
2182 case 1:
16a10388 2183 val += bfd_get_16 (input_bfd, where);
4a335f3d 2184 bfd_put_16 (input_bfd, val, where);
4a335f3d
AM		 2185 break;
2186 case 2:
2187 val += bfd_get_32 (input_bfd, where);
2188 bfd_put_32 (input_bfd, val, where);
2189 break;
2190 default:
2191 abort ();
252b5132 2192 }
252b5132
RH		 2193 continue;
2194 }
2195
2196 /* This is a final link. */
2197 h = NULL;
2198 sym = NULL;
2199 sec = NULL;
b34976b6 2200 unresolved_reloc = FALSE;
252b5132
RH		 2201 if (r_symndx < symtab_hdr->sh_info)
2202 {
2203 sym = local_syms + r_symndx;
2204 sec = local_sections[r_symndx];
2205 relocation = (sec->output_section->vma
2206 + sec->output_offset
2207 + sym->st_value);
f8df10f4
JJ		 2208 if ((sec->flags & SEC_MERGE)
2209 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2210 {
2211 asection *msec;
2212 bfd_vma addend;
4a335f3d 2213 bfd_byte *where = contents + rel->r_offset;
f8df10f4 2214
4a335f3d 2215 switch (howto->size)
f8df10f4 2216 {
4a335f3d
AM		 2217 case 0:
2218 addend = bfd_get_8 (input_bfd, where);
2219 if (howto->pc_relative)
2220 {
2221 addend = (addend ^ 0x80) - 0x80;
2222 addend += 1;
2223 }
2224 break;
2225 case 1:
2226 addend = bfd_get_16 (input_bfd, where);
2227 if (howto->pc_relative)
2228 {
2229 addend = (addend ^ 0x8000) - 0x8000;
2230 addend += 2;
2231 }
2232 break;
2233 case 2:
2234 addend = bfd_get_32 (input_bfd, where);
2235 if (howto->pc_relative)
2236 {
2237 addend = (addend ^ 0x80000000) - 0x80000000;
2238 addend += 4;
2239 }
2240 break;
2241 default:
2242 abort ();
f8df10f4
JJ		 2243 }
2244
f8df10f4 2245 msec = sec;
4a335f3d
AM		 2246 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
2247 addend -= relocation;
f8df10f4 2248 addend += msec->output_section->vma + msec->output_offset;
4a335f3d
AM		 2249
2250 switch (howto->size)
2251 {
2252 case 0:
16a10388 2253 /* FIXME: overflow checks. */
4a335f3d
AM		 2254 if (howto->pc_relative)
2255 addend -= 1;
2256 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 2257 break;
2258 case 1:
2259 if (howto->pc_relative)
2260 addend -= 2;
2261 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 2262 break;
2263 case 2:
2264 if (howto->pc_relative)
2265 addend -= 4;
2266 bfd_put_32 (input_bfd, addend, where);
2267 break;
2268 }
f8df10f4 2269 }
252b5132
RH		 2270 }
2271 else
2272 {
560e09e9 2273 bfd_boolean warned;
ffb2e45b 2274
b2a8e766
AM		 2275 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2276 r_symndx, symtab_hdr, sym_hashes,
2277 h, sec, relocation,
2278 unresolved_reloc, warned);
252b5132
RH		 2279 }
2280
9635fe29
AM		 2281 if (r_symndx == 0)
2282 {
2283 /* r_symndx will be zero only for relocs against symbols from
2284 removed linkonce sections, or sections discarded by a linker
2285 script. For these relocs, we just want the section contents
2286 zeroed. Avoid any special processing in the switch below. */
2287 r_type = R_386_NONE;
2288
2289 relocation = 0;
2290 if (howto->pc_relative)
2291 relocation = (input_section->output_section->vma
2292 + input_section->output_offset
2293 + rel->r_offset);
2294 }
2295
252b5132
RH		 2296 switch (r_type)
2297 {
2298 case R_386_GOT32:
2299 /* Relocation is to the entry for this symbol in the global
2300 offset table. */
ffb2e45b
AM		 2301 if (htab->sgot == NULL)
2302 abort ();
252b5132
RH		 2303
2304 if (h != NULL)
2305 {
b34976b6 2306 bfd_boolean dyn;
252b5132
RH		 2307
2308 off = h->got.offset;
ebe50bae 2309 dyn = htab->elf.dynamic_sections_created;
26e41594 2310 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
252b5132 2311 || (info->shared
586119b3 2312 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 2313 || (ELF_ST_VISIBILITY (h->other)
2314 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2315 {
2316 /* This is actually a static link, or it is a
2317 -Bsymbolic link and the symbol is defined
2318 locally, or the symbol was forced to be local
2319 because of a version file. We must initialize
2320 this entry in the global offset table. Since the
2321 offset must always be a multiple of 4, we use the
2322 least significant bit to record whether we have
2323 initialized it already.
2324
2325 When doing a dynamic link, we create a .rel.got
2326 relocation entry to initialize the value. This
2327 is done in the finish_dynamic_symbol routine. */
2328 if ((off & 1) != 0)
2329 off &= ~1;
2330 else
2331 {
2332 bfd_put_32 (output_bfd, relocation,
6725bdbf 2333 htab->sgot->contents + off);
252b5132
RH		 2334 h->got.offset |= 1;
2335 }
2336 }
8c694914 2337 else
b34976b6 2338 unresolved_reloc = FALSE;
252b5132
RH		 2339 }
2340 else
2341 {
ffb2e45b
AM		 2342 if (local_got_offsets == NULL)
2343 abort ();
252b5132
RH		 2344
2345 off = local_got_offsets[r_symndx];
2346
2347 /* The offset must always be a multiple of 4. We use
83be169b
AM		 2348 the least significant bit to record whether we have
2349 already generated the necessary reloc. */
252b5132
RH		 2350 if ((off & 1) != 0)
2351 off &= ~1;
2352 else
2353 {
6725bdbf
AM		 2354 bfd_put_32 (output_bfd, relocation,
2355 htab->sgot->contents + off);
252b5132
RH		 2356
2357 if (info->shared)
2358 {
947216bf
AM		 2359 asection *s;
2360 Elf_Internal_Rela outrel;
2361 bfd_byte *loc;
252b5132 2362
947216bf
AM		 2363 s = htab->srelgot;
2364 if (s == NULL)
ffb2e45b 2365 abort ();
252b5132 2366
6725bdbf
AM		 2367 outrel.r_offset = (htab->sgot->output_section->vma
2368 + htab->sgot->output_offset
252b5132
RH		 2369 + off);
2370 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
947216bf
AM		 2371 loc = s->contents;
2372 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 2373 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132
RH		 2374 }
2375
2376 local_got_offsets[r_symndx] |= 1;
2377 }
252b5132
RH		 2378 }
2379
ffb2e45b
AM		 2380 if (off >= (bfd_vma) -2)
2381 abort ();
2382
8c37241b
JJ		 2383 relocation = htab->sgot->output_section->vma
2384 + htab->sgot->output_offset + off
2385 - htab->sgotplt->output_section->vma
2386 - htab->sgotplt->output_offset;
252b5132
RH		 2387 break;
2388
2389 case R_386_GOTOFF:
2390 /* Relocation is relative to the start of the global offset
2391 table. */
2392
90f487df
L		 2393 /* Check to make sure it isn't a protected function symbol
2394 for shared library since it may not be local when used
2395 as function address. */
2396 if (info->shared
8fe76924 2397 && !info->executable
90f487df
L		 2398 && h
2399 && h->def_regular
2400 && h->type == STT_FUNC
2401 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2402 {
2403 (*_bfd_error_handler)
2404 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2405 input_bfd, h->root.root.string);
2406 bfd_set_error (bfd_error_bad_value);
2407 return FALSE;
2408 }
2409
8c37241b
JJ		 2410 /* Note that sgot is not involved in this
2411 calculation. We always want the start of .got.plt. If we
2412 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 2413 permitted by the ABI, we might have to change this
2414 calculation. */
8c37241b
JJ		 2415 relocation -= htab->sgotplt->output_section->vma
2416 + htab->sgotplt->output_offset;
252b5132
RH		 2417 break;
2418
2419 case R_386_GOTPC:
2420 /* Use global offset table as symbol value. */
8c37241b
JJ		 2421 relocation = htab->sgotplt->output_section->vma
2422 + htab->sgotplt->output_offset;
b34976b6 2423 unresolved_reloc = FALSE;
252b5132
RH		 2424 break;
2425
2426 case R_386_PLT32:
2427 /* Relocation is to the entry for this symbol in the
2428 procedure linkage table. */
2429
dd5724d5 2430 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 2431 without using the procedure linkage table. */
252b5132
RH		 2432 if (h == NULL)
2433 break;
2434
dd5724d5 2435 if (h->plt.offset == (bfd_vma) -1
6725bdbf 2436 || htab->splt == NULL)
252b5132
RH		 2437 {
2438 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 2439 happens when statically linking PIC code, or when
2440 using -Bsymbolic. */
252b5132
RH		 2441 break;
2442 }
2443
6725bdbf
AM		 2444 relocation = (htab->splt->output_section->vma
2445 + htab->splt->output_offset
252b5132 2446 + h->plt.offset);
b34976b6 2447 unresolved_reloc = FALSE;
252b5132
RH		 2448 break;
2449
2450 case R_386_32:
2451 case R_386_PC32:
f855931b 2452 if ((input_section->flags & SEC_ALLOC) == 0)
ec338859
AM		 2453 break;
2454
12d0ee4a 2455 if ((info->shared
ef5aade5
L		 2456 && (h == NULL
2457 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2458 || h->root.type != bfd_link_hash_undefweak)
12d0ee4a 2459 && (r_type != R_386_PC32
f6c52c13 2460 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845
AM		 2461 || (ELIMINATE_COPY_RELOCS
2462 && !info->shared
12d0ee4a
AM		 2463 && h != NULL
2464 && h->dynindx != -1
f5385ebf
AM		 2465 && !h->non_got_ref
2466 && ((h->def_dynamic
2467 && !h->def_regular)
28d0b90e
AM		 2468 || h->root.type == bfd_link_hash_undefweak
2469 || h->root.type == bfd_link_hash_undefined)))
252b5132 2470 {
947216bf
AM		 2471 Elf_Internal_Rela outrel;
2472 bfd_byte *loc;
b34976b6 2473 bfd_boolean skip, relocate;
0c715baa 2474 asection *sreloc;
252b5132
RH		 2475
2476 /* When generating a shared object, these relocations
2477 are copied into the output file to be resolved at run
2478 time. */
2479
b34976b6
AM		 2480 skip = FALSE;
2481 relocate = FALSE;
252b5132 2482
c629eae0
JJ		 2483 outrel.r_offset =
2484 _bfd_elf_section_offset (output_bfd, info, input_section,
2485 rel->r_offset);
2486 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2487 skip = TRUE;
0bb2d96a 2488 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2489 skip = TRUE, relocate = TRUE;
252b5132
RH		 2490 outrel.r_offset += (input_section->output_section->vma
2491 + input_section->output_offset);
2492
2493 if (skip)
0bb2d96a 2494 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 2495 else if (h != NULL
2496 && h->dynindx != -1
2497 && (r_type == R_386_PC32
2498 || !info->shared
2499 || !info->symbolic
f5385ebf 2500 || !h->def_regular))
0bb2d96a 2501 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2502 else
2503 {
5a15f56f 2504 /* This symbol is local, or marked to become local. */
b34976b6 2505 relocate = TRUE;
5a15f56f 2506 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 2507 }
2508
0c715baa
AM		 2509 sreloc = elf_section_data (input_section)->sreloc;
2510 if (sreloc == NULL)
2511 abort ();
2512
947216bf
AM		 2513 loc = sreloc->contents;
2514 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
0c715baa 2515 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132
RH		 2516
2517 /* If this reloc is against an external symbol, we do
2518 not want to fiddle with the addend. Otherwise, we
2519 need to include the symbol value so that it becomes
2520 an addend for the dynamic reloc. */
2521 if (! relocate)
2522 continue;
2523 }
252b5132
RH		 2524 break;
2525
37e55690
JJ		 2526 case R_386_TLS_IE:
2527 if (info->shared)
2528 {
947216bf
AM		 2529 Elf_Internal_Rela outrel;
2530 bfd_byte *loc;
37e55690 2531 asection *sreloc;
37e55690
JJ		 2532
2533 outrel.r_offset = rel->r_offset
2534 + input_section->output_section->vma
2535 + input_section->output_offset;
2536 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2537 sreloc = elf_section_data (input_section)->sreloc;
2538 if (sreloc == NULL)
2539 abort ();
947216bf
AM		 2540 loc = sreloc->contents;
2541 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
37e55690
JJ		 2542 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2543 }
2544 /* Fall through */
2545
13ae64f3
JJ		 2546 case R_386_TLS_GD:
2547 case R_386_TLS_IE_32:
37e55690 2548 case R_386_TLS_GOTIE:
13ae64f3
JJ		 2549 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
2550 tls_type = GOT_UNKNOWN;
2551 if (h == NULL && local_got_offsets)
2552 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2553 else if (h != NULL)
2554 {
2555 tls_type = elf_i386_hash_entry(h)->tls_type;
37e55690 2556 if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE))
13ae64f3
JJ		 2557 r_type = R_386_TLS_LE_32;
2558 }
37e55690
JJ		 2559 if (tls_type == GOT_TLS_IE)
2560 tls_type = GOT_TLS_IE_NEG;
2561 if (r_type == R_386_TLS_GD)
2562 {
2563 if (tls_type == GOT_TLS_IE_POS)
2564 r_type = R_386_TLS_GOTIE;
2565 else if (tls_type & GOT_TLS_IE)
2566 r_type = R_386_TLS_IE_32;
2567 }
13ae64f3
JJ		 2568
2569 if (r_type == R_386_TLS_LE_32)
2570 {
82e51918 2571 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 2572 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2573 {
2574 unsigned int val, type;
2575 bfd_vma roff;
2576
2577 /* GD->LE transition. */
2578 BFD_ASSERT (rel->r_offset >= 2);
2579 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2580 BFD_ASSERT (type == 0x8d || type == 0x04);
eea6121a 2581 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
13ae64f3
JJ		 2582 BFD_ASSERT (bfd_get_8 (input_bfd,
2583 contents + rel->r_offset + 4)
2584 == 0xe8);
2585 BFD_ASSERT (rel + 1 < relend);
2586 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2587 roff = rel->r_offset + 5;
2588 val = bfd_get_8 (input_bfd,
2589 contents + rel->r_offset - 1);
2590 if (type == 0x04)
2591 {
2592 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2593 Change it into:
2594 movl %gs:0, %eax; subl $foo@tpoff, %eax
2595 (6 byte form of subl). */
2596 BFD_ASSERT (rel->r_offset >= 3);
2597 BFD_ASSERT (bfd_get_8 (input_bfd,
2598 contents + rel->r_offset - 3)
2599 == 0x8d);
2600 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2601 memcpy (contents + rel->r_offset - 3,
2602 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2603 }
2604 else
2605 {
2606 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
eea6121a 2607 if (rel->r_offset + 10 <= input_section->size
13ae64f3
JJ		 2608 && bfd_get_8 (input_bfd,
2609 contents + rel->r_offset + 9) == 0x90)
2610 {
2611 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2612 Change it into:
2613 movl %gs:0, %eax; subl $foo@tpoff, %eax
2614 (6 byte form of subl). */
2615 memcpy (contents + rel->r_offset - 2,
2616 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2617 roff = rel->r_offset + 6;
2618 }
2619 else
2620 {
2621 /* leal foo(%reg), %eax; call ___tls_get_addr
2622 Change it into:
2623 movl %gs:0, %eax; subl $foo@tpoff, %eax
2624 (5 byte form of subl). */
2625 memcpy (contents + rel->r_offset - 2,
2626 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2627 }
2628 }
2629 bfd_put_32 (output_bfd, tpoff (info, relocation),
2630 contents + roff);
2631 /* Skip R_386_PLT32. */
2632 rel++;
2633 continue;
2634 }
37e55690 2635 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3
JJ		 2636 {
2637 unsigned int val, type;
2638
2639 /* IE->LE transition:
37e55690
JJ		 2640 Originally it can be one of:
2641 movl foo, %eax
2642 movl foo, %reg
2643 addl foo, %reg
2644 We change it into:
2645 movl $foo, %eax
2646 movl $foo, %reg
2647 addl $foo, %reg. */
2648 BFD_ASSERT (rel->r_offset >= 1);
2649 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
eea6121a 2650 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
37e55690
JJ		 2651 if (val == 0xa1)
2652 {
2653 /* movl foo, %eax. */
55fd94b0
AM		 2654 bfd_put_8 (output_bfd, 0xb8,
2655 contents + rel->r_offset - 1);
37e55690 2656 }
299bf759 2657 else
37e55690 2658 {
299bf759 2659 BFD_ASSERT (rel->r_offset >= 2);
55fd94b0
AM		 2660 type = bfd_get_8 (input_bfd,
2661 contents + rel->r_offset - 2);
299bf759 2662 switch (type)
26e41594 2663 {
299bf759
L		 2664 case 0x8b:
2665 /* movl */
2666 BFD_ASSERT ((val & 0xc7) == 0x05);
2667 bfd_put_8 (output_bfd, 0xc7,
2668 contents + rel->r_offset - 2);
2669 bfd_put_8 (output_bfd,
2670 0xc0 | ((val >> 3) & 7),
2671 contents + rel->r_offset - 1);
2672 break;
2673 case 0x03:
2674 /* addl */
2675 BFD_ASSERT ((val & 0xc7) == 0x05);
2676 bfd_put_8 (output_bfd, 0x81,
2677 contents + rel->r_offset - 2);
2678 bfd_put_8 (output_bfd,
2679 0xc0 | ((val >> 3) & 7),
2680 contents + rel->r_offset - 1);
2681 break;
2682 default:
2683 BFD_FAIL ();
2684 break;
26e41594 2685 }
37e55690 2686 }
37e55690
JJ		 2687 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2688 contents + rel->r_offset);
2689 continue;
2690 }
2691 else
2692 {
2693 unsigned int val, type;
2694
2695 /* {IE_32,GOTIE}->LE transition:
2696 Originally it can be one of:
13ae64f3 2697 subl foo(%reg1), %reg2
13ae64f3 2698 movl foo(%reg1), %reg2
37e55690 2699 addl foo(%reg1), %reg2
13ae64f3
JJ		 2700 We change it into:
2701 subl $foo, %reg2
37e55690
JJ		 2702 movl $foo, %reg2 (6 byte form)
2703 addl $foo, %reg2. */
13ae64f3
JJ		 2704 BFD_ASSERT (rel->r_offset >= 2);
2705 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2706 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
eea6121a 2707 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
37e55690 2708 BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4);
13ae64f3
JJ		 2709 if (type == 0x8b)
2710 {
2711 /* movl */
13ae64f3
JJ		 2712 bfd_put_8 (output_bfd, 0xc7,
2713 contents + rel->r_offset - 2);
2714 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2715 contents + rel->r_offset - 1);
2716 }
2717 else if (type == 0x2b)
2718 {
2719 /* subl */
13ae64f3
JJ		 2720 bfd_put_8 (output_bfd, 0x81,
2721 contents + rel->r_offset - 2);
2722 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2723 contents + rel->r_offset - 1);
2724 }
37e55690
JJ		 2725 else if (type == 0x03)
2726 {
2727 /* addl */
2728 bfd_put_8 (output_bfd, 0x81,
2729 contents + rel->r_offset - 2);
2730 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2731 contents + rel->r_offset - 1);
2732 }
13ae64f3
JJ		 2733 else
2734 BFD_FAIL ();
37e55690
JJ		 2735 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
2736 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2737 contents + rel->r_offset);
2738 else
2739 bfd_put_32 (output_bfd, tpoff (info, relocation),
2740 contents + rel->r_offset);
13ae64f3
JJ		 2741 continue;
2742 }
2743 }
2744
2745 if (htab->sgot == NULL)
2746 abort ();
2747
2748 if (h != NULL)
2749 off = h->got.offset;
2750 else
2751 {
2752 if (local_got_offsets == NULL)
2753 abort ();
2754
2755 off = local_got_offsets[r_symndx];
2756 }
2757
2758 if ((off & 1) != 0)
2759 off &= ~1;
26e41594 2760 else
13ae64f3 2761 {
947216bf
AM		 2762 Elf_Internal_Rela outrel;
2763 bfd_byte *loc;
13ae64f3
JJ		 2764 int dr_type, indx;
2765
2766 if (htab->srelgot == NULL)
2767 abort ();
2768
2769 outrel.r_offset = (htab->sgot->output_section->vma
2770 + htab->sgot->output_offset + off);
2771
13ae64f3
JJ		 2772 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2773 if (r_type == R_386_TLS_GD)
2774 dr_type = R_386_TLS_DTPMOD32;
37e55690
JJ		 2775 else if (tls_type == GOT_TLS_IE_POS)
2776 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 2777 else
2778 dr_type = R_386_TLS_TPOFF32;
37e55690
JJ		 2779 if (dr_type == R_386_TLS_TPOFF && indx == 0)
2780 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
2781 htab->sgot->contents + off);
2782 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
c5c1f40c 2783 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
c366c25e
JJ		 2784 htab->sgot->contents + off);
2785 else
2786 bfd_put_32 (output_bfd, 0,
2787 htab->sgot->contents + off);
13ae64f3 2788 outrel.r_info = ELF32_R_INFO (indx, dr_type);
947216bf
AM		 2789 loc = htab->srelgot->contents;
2790 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
13ae64f3
JJ		 2791 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2792
2793 if (r_type == R_386_TLS_GD)
2794 {
2795 if (indx == 0)
2796 {
82e51918 2797 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 2798 bfd_put_32 (output_bfd,
2799 relocation - dtpoff_base (info),
2800 htab->sgot->contents + off + 4);
2801 }
2802 else
2803 {
2804 bfd_put_32 (output_bfd, 0,
2805 htab->sgot->contents + off + 4);
2806 outrel.r_info = ELF32_R_INFO (indx,
2807 R_386_TLS_DTPOFF32);
2808 outrel.r_offset += 4;
2809 htab->srelgot->reloc_count++;
947216bf
AM		 2810 loc += sizeof (Elf32_External_Rel);
2811 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
13ae64f3
JJ		 2812 }
2813 }
37e55690
JJ		 2814 else if (tls_type == GOT_TLS_IE_BOTH)
2815 {
2816 bfd_put_32 (output_bfd,
2817 indx == 0 ? relocation - dtpoff_base (info) : 0,
2818 htab->sgot->contents + off + 4);
2819 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2820 outrel.r_offset += 4;
2821 htab->srelgot->reloc_count++;
947216bf 2822 loc += sizeof (Elf32_External_Rel);
37e55690
JJ		 2823 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2824 }
13ae64f3
JJ		 2825
2826 if (h != NULL)
2827 h->got.offset |= 1;
2828 else
2829 local_got_offsets[r_symndx] |= 1;
2830 }
2831
2832 if (off >= (bfd_vma) -2)
2833 abort ();
2834 if (r_type == ELF32_R_TYPE (rel->r_info))
2835 {
8c37241b
JJ		 2836 bfd_vma g_o_t = htab->sgotplt->output_section->vma
2837 + htab->sgotplt->output_offset;
2838 relocation = htab->sgot->output_section->vma
2839 + htab->sgot->output_offset + off - g_o_t;
37e55690
JJ		 2840 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
2841 && tls_type == GOT_TLS_IE_BOTH)
2842 relocation += 4;
2843 if (r_type == R_386_TLS_IE)
8c37241b 2844 relocation += g_o_t;
b34976b6 2845 unresolved_reloc = FALSE;
13ae64f3
JJ		 2846 }
2847 else
2848 {
2849 unsigned int val, type;
2850 bfd_vma roff;
2851
2852 /* GD->IE transition. */
2853 BFD_ASSERT (rel->r_offset >= 2);
2854 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2855 BFD_ASSERT (type == 0x8d || type == 0x04);
eea6121a 2856 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
13ae64f3
JJ		 2857 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2858 == 0xe8);
2859 BFD_ASSERT (rel + 1 < relend);
2860 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2861 roff = rel->r_offset - 3;
2862 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2863 if (type == 0x04)
2864 {
2865 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2866 Change it into:
2867 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2868 BFD_ASSERT (rel->r_offset >= 3);
2869 BFD_ASSERT (bfd_get_8 (input_bfd,
2870 contents + rel->r_offset - 3)
2871 == 0x8d);
2872 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2873 val >>= 3;
2874 }
2875 else
2876 {
2877 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2878 Change it into:
2879 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
eea6121a 2880 BFD_ASSERT (rel->r_offset + 10 <= input_section->size);
13ae64f3
JJ		 2881 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2882 BFD_ASSERT (bfd_get_8 (input_bfd,
2883 contents + rel->r_offset + 9)
2884 == 0x90);
2885 roff = rel->r_offset - 2;
2886 }
2887 memcpy (contents + roff,
2888 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
2889 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 2890 /* If foo is used only with foo@gotntpoff(%reg) and
2891 foo@indntpoff, but not with foo@gottpoff(%reg), change
2892 subl $foo@gottpoff(%reg), %eax
2893 into:
2894 addl $foo@gotntpoff(%reg), %eax. */
2895 if (r_type == R_386_TLS_GOTIE)
2896 {
2897 contents[roff + 6] = 0x03;
2898 if (tls_type == GOT_TLS_IE_BOTH)
2899 off += 4;
2900 }
8c37241b
JJ		 2901 bfd_put_32 (output_bfd,
2902 htab->sgot->output_section->vma
2903 + htab->sgot->output_offset + off
2904 - htab->sgotplt->output_section->vma
2905 - htab->sgotplt->output_offset,
13ae64f3
JJ		 2906 contents + roff + 8);
2907 /* Skip R_386_PLT32. */
2908 rel++;
2909 continue;
2910 }
2911 break;
2912
2913 case R_386_TLS_LDM:
2914 if (! info->shared)
2915 {
2916 unsigned int val;
2917
2918 /* LD->LE transition:
2919 Ensure it is:
2920 leal foo(%reg), %eax; call ___tls_get_addr.
2921 We change it into:
2922 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
2923 BFD_ASSERT (rel->r_offset >= 2);
2924 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
2925 == 0x8d);
2926 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2927 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
eea6121a 2928 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
13ae64f3
JJ		 2929 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2930 == 0xe8);
2931 BFD_ASSERT (rel + 1 < relend);
2932 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2933 memcpy (contents + rel->r_offset - 2,
2934 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
2935 /* Skip R_386_PLT32. */
2936 rel++;
2937 continue;
2938 }
2939
2940 if (htab->sgot == NULL)
2941 abort ();
2942
2943 off = htab->tls_ldm_got.offset;
2944 if (off & 1)
2945 off &= ~1;
2946 else
2947 {
947216bf
AM		 2948 Elf_Internal_Rela outrel;
2949 bfd_byte *loc;
13ae64f3
JJ		 2950
2951 if (htab->srelgot == NULL)
2952 abort ();
2953
2954 outrel.r_offset = (htab->sgot->output_section->vma
2955 + htab->sgot->output_offset + off);
2956
2957 bfd_put_32 (output_bfd, 0,
2958 htab->sgot->contents + off);
2959 bfd_put_32 (output_bfd, 0,
2960 htab->sgot->contents + off + 4);
2961 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
947216bf
AM		 2962 loc = htab->srelgot->contents;
2963 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
13ae64f3
JJ		 2964 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2965 htab->tls_ldm_got.offset |= 1;
2966 }
8c37241b
JJ		 2967 relocation = htab->sgot->output_section->vma
2968 + htab->sgot->output_offset + off
2969 - htab->sgotplt->output_section->vma
2970 - htab->sgotplt->output_offset;
b34976b6 2971 unresolved_reloc = FALSE;
13ae64f3
JJ		 2972 break;
2973
2974 case R_386_TLS_LDO_32:
a45bb67d 2975 if (info->shared || (input_section->flags & SEC_CODE) == 0)
13ae64f3
JJ		 2976 relocation -= dtpoff_base (info);
2977 else
2978 /* When converting LDO to LE, we must negate. */
2979 relocation = -tpoff (info, relocation);
2980 break;
2981
2982 case R_386_TLS_LE_32:
13ae64f3 2983 case R_386_TLS_LE:
37e55690
JJ		 2984 if (info->shared)
2985 {
947216bf 2986 Elf_Internal_Rela outrel;
37e55690 2987 asection *sreloc;
947216bf 2988 bfd_byte *loc;
37e55690
JJ		 2989 int indx;
2990
2991 outrel.r_offset = rel->r_offset
2992 + input_section->output_section->vma
2993 + input_section->output_offset;
2994 if (h != NULL && h->dynindx != -1)
2995 indx = h->dynindx;
2996 else
2997 indx = 0;
2998 if (r_type == R_386_TLS_LE_32)
2999 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3000 else
3001 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3002 sreloc = elf_section_data (input_section)->sreloc;
3003 if (sreloc == NULL)
3004 abort ();
947216bf
AM		 3005 loc = sreloc->contents;
3006 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
37e55690
JJ		 3007 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3008 if (indx)
3009 continue;
3010 else if (r_type == R_386_TLS_LE_32)
3011 relocation = dtpoff_base (info) - relocation;
3012 else
3013 relocation -= dtpoff_base (info);
3014 }
3015 else if (r_type == R_386_TLS_LE_32)
3016 relocation = tpoff (info, relocation);
3017 else
3018 relocation = -tpoff (info, relocation);
13ae64f3
JJ		 3019 break;
3020
252b5132
RH		 3021 default:
3022 break;
3023 }
3024
239e1f3a
AM		 3025 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3026 because such sections are not SEC_ALLOC and thus ld.so will
3027 not process them. */
8c694914 3028 if (unresolved_reloc
239e1f3a 3029 && !((input_section->flags & SEC_DEBUGGING) != 0
f5385ebf 3030 && h->def_dynamic))
6a30718d
JJ		 3031 {
3032 (*_bfd_error_handler)
d003868e
AM		 3033 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3034 input_bfd,
3035 input_section,
6a30718d
JJ		 3036 (long) rel->r_offset,
3037 h->root.root.string);
b34976b6 3038 return FALSE;
6a30718d 3039 }
83be169b 3040
252b5132
RH		 3041 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3042 contents, rel->r_offset,
55fd94b0 3043 relocation, 0);
252b5132 3044
cf5c0c5b 3045 if (r != bfd_reloc_ok)
252b5132 3046 {
cf5c0c5b 3047 const char *name;
ffb2e45b 3048
cf5c0c5b
AM		 3049 if (h != NULL)
3050 name = h->root.root.string;
3051 else
3052 {
3053 name = bfd_elf_string_from_elf_section (input_bfd,
3054 symtab_hdr->sh_link,
3055 sym->st_name);
3056 if (name == NULL)
b34976b6 3057 return FALSE;
cf5c0c5b
AM		 3058 if (*name == '\0')
3059 name = bfd_section_name (input_bfd, sec);
3060 }
ffb2e45b 3061
cf5c0c5b
AM		 3062 if (r == bfd_reloc_overflow)
3063 {
cf5c0c5b 3064 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 3065 (info, (h ? &h->root : NULL), name, howto->name,
3066 (bfd_vma) 0, input_bfd, input_section,
3067 rel->r_offset)))
b34976b6 3068 return FALSE;
cf5c0c5b
AM		 3069 }
3070 else
3071 {
3072 (*_bfd_error_handler)
d003868e
AM		 3073 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3074 input_bfd, input_section,
cf5c0c5b 3075 (long) rel->r_offset, name, (int) r);
b34976b6 3076 return FALSE;
cf5c0c5b 3077 }
252b5132
RH		 3078 }
3079 }
3080
b34976b6 3081 return TRUE;
252b5132
RH		 3082}
3083
3084/* Finish up dynamic symbol handling. We set the contents of various
3085 dynamic sections here. */
3086
b34976b6 3087static bfd_boolean
55fd94b0
AM		 3088elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3089 struct bfd_link_info *info,
3090 struct elf_link_hash_entry *h,
3091 Elf_Internal_Sym *sym)
252b5132 3092{
6725bdbf 3093 struct elf_i386_link_hash_table *htab;
252b5132 3094
6725bdbf 3095 htab = elf_i386_hash_table (info);
252b5132
RH		 3096
3097 if (h->plt.offset != (bfd_vma) -1)
3098 {
252b5132
RH		 3099 bfd_vma plt_index;
3100 bfd_vma got_offset;
947216bf
AM		 3101 Elf_Internal_Rela rel;
3102 bfd_byte *loc;
252b5132
RH		 3103
3104 /* This symbol has an entry in the procedure linkage table. Set
3105 it up. */
3106
ffb2e45b
AM		 3107 if (h->dynindx == -1
3108 || htab->splt == NULL
3109 || htab->sgotplt == NULL
3110 || htab->srelplt == NULL)
3111 abort ();
252b5132
RH		 3112
3113 /* Get the index in the procedure linkage table which
3114 corresponds to this symbol. This is the index of this symbol
3115 in all the symbols for which we are making plt entries. The
3116 first entry in the procedure linkage table is reserved. */
3117 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3118
3119 /* Get the offset into the .got table of the entry that
3120 corresponds to this function. Each .got entry is 4 bytes.
3121 The first three are reserved. */
3122 got_offset = (plt_index + 3) * 4;
3123
3124 /* Fill in the entry in the procedure linkage table. */
3125 if (! info->shared)
3126 {
6725bdbf 3127 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
252b5132
RH		 3128 PLT_ENTRY_SIZE);
3129 bfd_put_32 (output_bfd,
6725bdbf
AM		 3130 (htab->sgotplt->output_section->vma
3131 + htab->sgotplt->output_offset
252b5132 3132 + got_offset),
6725bdbf 3133 htab->splt->contents + h->plt.offset + 2);
eac338cf
PB		 3134
3135 if (htab->is_vxworks)
3136 {
3137 int s, k, reloc_index;
3138
3139 /* Create the R_386_32 relocation referencing the GOT
3140 for this PLT entry. */
3141
3142 /* S: Current slot number (zero-based). */
3143 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3144 /* K: Number of relocations for PLTResolve. */
3145 if (info->shared)
3146 k = PLTRESOLVE_RELOCS_SHLIB;
3147 else
3148 k = PLTRESOLVE_RELOCS;
3149 /* Skip the PLTresolve relocations, and the relocations for
3150 the other PLT slots. */
3151 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3152 loc = (htab->srelplt2->contents + reloc_index
3153 * sizeof (Elf32_External_Rel));
3154
3155 rel.r_offset = (htab->splt->output_section->vma
3156 + htab->splt->output_offset
3157 + h->plt.offset + 2),
3158 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_386_32);
3159 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3160
3161 /* Create the R_386_32 relocation referencing the beginning of
3162 the PLT for this GOT entry. */
3163 rel.r_offset = (htab->sgotplt->output_section->vma
3164 + htab->sgotplt->output_offset
3165 + got_offset);
3166 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_386_32);
3167 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3168 loc + sizeof (Elf32_External_Rel));
3169 }
252b5132
RH		 3170 }
3171 else
3172 {
6725bdbf 3173 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
252b5132
RH		 3174 PLT_ENTRY_SIZE);
3175 bfd_put_32 (output_bfd, got_offset,
6725bdbf 3176 htab->splt->contents + h->plt.offset + 2);
252b5132
RH		 3177 }
3178
3179 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
6725bdbf 3180 htab->splt->contents + h->plt.offset + 7);
252b5132 3181 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
6725bdbf 3182 htab->splt->contents + h->plt.offset + 12);
252b5132
RH		 3183
3184 /* Fill in the entry in the global offset table. */
3185 bfd_put_32 (output_bfd,
6725bdbf
AM		 3186 (htab->splt->output_section->vma
3187 + htab->splt->output_offset
252b5132
RH		 3188 + h->plt.offset
3189 + 6),
6725bdbf 3190 htab->sgotplt->contents + got_offset);
252b5132
RH		 3191
3192 /* Fill in the entry in the .rel.plt section. */
6725bdbf
AM		 3193 rel.r_offset = (htab->sgotplt->output_section->vma
3194 + htab->sgotplt->output_offset
252b5132
RH		 3195 + got_offset);
3196 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
947216bf 3197 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
0ac8d2ca 3198 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132 3199
f5385ebf 3200 if (!h->def_regular)
252b5132
RH		 3201 {
3202 /* Mark the symbol as undefined, rather than as defined in
c6585bbb
JJ		 3203 the .plt section. Leave the value if there were any
3204 relocations where pointer equality matters (this is a clue
51b64d56
AM		 3205 for the dynamic linker, to make function pointer
3206 comparisons work between an application and shared
c6585bbb
JJ		 3207 library), otherwise set it to zero. If a function is only
3208 called from a binary, there is no need to slow down
3209 shared libraries because of that. */
252b5132 3210 sym->st_shndx = SHN_UNDEF;
f5385ebf 3211 if (!h->pointer_equality_needed)
c6585bbb 3212 sym->st_value = 0;
252b5132
RH		 3213 }
3214 }
3215
13ae64f3
JJ		 3216 if (h->got.offset != (bfd_vma) -1
3217 && elf_i386_hash_entry(h)->tls_type != GOT_TLS_GD
37e55690 3218 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
252b5132 3219 {
947216bf
AM		 3220 Elf_Internal_Rela rel;
3221 bfd_byte *loc;
252b5132
RH		 3222
3223 /* This symbol has an entry in the global offset table. Set it
3224 up. */
3225
ffb2e45b
AM		 3226 if (htab->sgot == NULL || htab->srelgot == NULL)
3227 abort ();
252b5132 3228
6725bdbf
AM		 3229 rel.r_offset = (htab->sgot->output_section->vma
3230 + htab->sgot->output_offset
dc810e39 3231 + (h->got.offset & ~(bfd_vma) 1));
252b5132 3232
dd5724d5
AM		 3233 /* If this is a static link, or it is a -Bsymbolic link and the
3234 symbol is defined locally or was forced to be local because
3235 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 3236 The entry in the global offset table will already have been
3237 initialized in the relocate_section function. */
6725bdbf 3238 if (info->shared
586119b3 3239 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 3240 {
6725bdbf 3241 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 3242 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3243 }
252b5132
RH		 3244 else
3245 {
dd5724d5 3246 BFD_ASSERT((h->got.offset & 1) == 0);
6725bdbf
AM		 3247 bfd_put_32 (output_bfd, (bfd_vma) 0,
3248 htab->sgot->contents + h->got.offset);
252b5132
RH		 3249 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3250 }
3251
947216bf
AM		 3252 loc = htab->srelgot->contents;
3253 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 3254 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 3255 }
3256
f5385ebf 3257 if (h->needs_copy)
252b5132 3258 {
947216bf
AM		 3259 Elf_Internal_Rela rel;
3260 bfd_byte *loc;
252b5132
RH		 3261
3262 /* This symbol needs a copy reloc. Set it up. */
3263
ffb2e45b
AM		 3264 if (h->dynindx == -1
3265 || (h->root.type != bfd_link_hash_defined
3266 && h->root.type != bfd_link_hash_defweak)
3267 || htab->srelbss == NULL)
3268 abort ();
252b5132
RH		 3269
3270 rel.r_offset = (h->root.u.def.value
3271 + h->root.u.def.section->output_section->vma
3272 + h->root.u.def.section->output_offset);
3273 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
947216bf
AM		 3274 loc = htab->srelbss->contents;
3275 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 3276 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 3277 }
3278
eac338cf
PB		 3279 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3280 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3281 is relative to the ".got" section. */
252b5132 3282 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
eac338cf
PB		 3283 || (strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3284 && !htab->is_vxworks))
252b5132
RH		 3285 sym->st_shndx = SHN_ABS;
3286
b34976b6 3287 return TRUE;
252b5132
RH		 3288}
3289
38701953
AM		 3290/* Used to decide how to sort relocs in an optimal manner for the
3291 dynamic linker, before writing them out. */
3292
3293static enum elf_reloc_type_class
55fd94b0 3294elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
38701953 3295{
55fd94b0 3296 switch (ELF32_R_TYPE (rela->r_info))
38701953
AM		 3297 {
3298 case R_386_RELATIVE:
3299 return reloc_class_relative;
3300 case R_386_JUMP_SLOT:
3301 return reloc_class_plt;
3302 case R_386_COPY:
3303 return reloc_class_copy;
3304 default:
3305 return reloc_class_normal;
3306 }
3307}
3308
252b5132
RH		 3309/* Finish up the dynamic sections. */
3310
b34976b6 3311static bfd_boolean
55fd94b0
AM		 3312elf_i386_finish_dynamic_sections (bfd *output_bfd,
3313 struct bfd_link_info *info)
252b5132 3314{
6725bdbf 3315 struct elf_i386_link_hash_table *htab;
252b5132 3316 bfd *dynobj;
252b5132
RH		 3317 asection *sdyn;
3318
6725bdbf 3319 htab = elf_i386_hash_table (info);
ebe50bae 3320 dynobj = htab->elf.dynobj;
252b5132
RH		 3321 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3322
ebe50bae 3323 if (htab->elf.dynamic_sections_created)
252b5132 3324 {
252b5132
RH		 3325 Elf32_External_Dyn *dyncon, *dynconend;
3326
ffb2e45b
AM		 3327 if (sdyn == NULL || htab->sgot == NULL)
3328 abort ();
252b5132
RH		 3329
3330 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 3331 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 3332 for (; dyncon < dynconend; dyncon++)
3333 {
3334 Elf_Internal_Dyn dyn;
51b64d56 3335 asection *s;
252b5132
RH		 3336
3337 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3338
3339 switch (dyn.d_tag)
3340 {
3341 default:
0ac8d2ca 3342 continue;
252b5132
RH		 3343
3344 case DT_PLTGOT:
8c37241b
JJ		 3345 s = htab->sgotplt;
3346 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 3347 break;
3348
252b5132 3349 case DT_JMPREL:
6348e046
AM		 3350 s = htab->srelplt;
3351 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 3352 break;
3353
3354 case DT_PLTRELSZ:
6348e046 3355 s = htab->srelplt;
eea6121a 3356 dyn.d_un.d_val = s->size;
252b5132
RH		 3357 break;
3358
3359 case DT_RELSZ:
3360 /* My reading of the SVR4 ABI indicates that the
3361 procedure linkage table relocs (DT_JMPREL) should be
3362 included in the overall relocs (DT_REL). This is
3363 what Solaris does. However, UnixWare can not handle
3364 that case. Therefore, we override the DT_RELSZ entry
6348e046
AM		 3365 here to make it not include the JMPREL relocs. */
3366 s = htab->srelplt;
3367 if (s == NULL)
3368 continue;
eea6121a 3369 dyn.d_un.d_val -= s->size;
6348e046
AM		 3370 break;
3371
3372 case DT_REL:
3373 /* We may not be using the standard ELF linker script.
3374 If .rel.plt is the first .rel section, we adjust
3375 DT_REL to not include it. */
3376 s = htab->srelplt;
3377 if (s == NULL)
3378 continue;
3379 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3380 continue;
eea6121a 3381 dyn.d_un.d_ptr += s->size;
252b5132
RH		 3382 break;
3383 }
0ac8d2ca
AM		 3384
3385 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 3386 }
3387
3388 /* Fill in the first entry in the procedure linkage table. */
eea6121a 3389 if (htab->splt && htab->splt->size > 0)
252b5132
RH		 3390 {
3391 if (info->shared)
eac338cf
PB		 3392 {
3393 memcpy (htab->splt->contents, elf_i386_pic_plt0_entry,
3394 sizeof (elf_i386_pic_plt0_entry));
3395 memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry),
3396 htab->plt0_pad_byte,
3397 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
3398 }
252b5132
RH		 3399 else
3400 {
eac338cf
PB		 3401 memcpy (htab->splt->contents, elf_i386_plt0_entry,
3402 sizeof(elf_i386_plt0_entry));
3403 memset (htab->splt->contents + sizeof (elf_i386_plt0_entry),
3404 htab->plt0_pad_byte,
3405 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
252b5132 3406 bfd_put_32 (output_bfd,
6725bdbf
AM		 3407 (htab->sgotplt->output_section->vma
3408 + htab->sgotplt->output_offset
3409 + 4),
3410 htab->splt->contents + 2);
252b5132 3411 bfd_put_32 (output_bfd,
6725bdbf
AM		 3412 (htab->sgotplt->output_section->vma
3413 + htab->sgotplt->output_offset
3414 + 8),
3415 htab->splt->contents + 8);
eac338cf
PB		 3416
3417 if (htab->is_vxworks)
3418 {
3419 Elf_Internal_Rela rel;
3420 struct elf_link_hash_entry *hgot;
3421
3422 /* The VxWorks GOT is relocated by the dynamic linker.
3423 Therefore, we must emit relocations rather than
3424 simply computing the values now. */
3425 hgot = elf_link_hash_lookup (elf_hash_table (info),
3426 "_GLOBAL_OFFSET_TABLE_",
3427 FALSE, FALSE, FALSE);
3428 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3429 On IA32 we use REL relocations so the addend goes in
3430 the PLT directly. */
3431 rel.r_offset = (htab->splt->output_section->vma
3432 + htab->splt->output_offset
3433 + 2);
3434 rel.r_info = ELF32_R_INFO (hgot->indx, R_386_32);
3435 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3436 htab->srelplt2->contents);
3437 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3438 rel.r_offset = (htab->splt->output_section->vma
3439 + htab->splt->output_offset
3440 + 8);
3441 rel.r_info = ELF32_R_INFO (hgot->indx, R_386_32);
3442 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3443 htab->srelplt2->contents +
3444 sizeof (Elf32_External_Rel));
3445 }
252b5132
RH		 3446 }
3447
3448 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3449 really seem like the right value. */
6725bdbf
AM		 3450 elf_section_data (htab->splt->output_section)
3451 ->this_hdr.sh_entsize = 4;
eac338cf
PB		 3452
3453 /* Correct the .rel.plt.unloaded relocations. */
3454 if (htab->is_vxworks && !info->shared)
3455 {
3456 int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1;
4c9b0de6 3457 unsigned char *p;
eac338cf
PB		 3458
3459 p = htab->srelplt2->contents;
3460 if (info->shared)
3461 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
3462 else
3463 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
3464
3465 for (; num_plts; num_plts--)
3466 {
3467 Elf_Internal_Rela rel;
3468 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3469 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_386_32);
3470 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3471 p += sizeof (Elf32_External_Rel);
3472
3473 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3474 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_386_32);
3475 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3476 p += sizeof (Elf32_External_Rel);
3477 }
3478 }
252b5132
RH		 3479 }
3480 }
3481
12d0ee4a 3482 if (htab->sgotplt)
252b5132 3483 {
12d0ee4a 3484 /* Fill in the first three entries in the global offset table. */
eea6121a 3485 if (htab->sgotplt->size > 0)
12d0ee4a
AM		 3486 {
3487 bfd_put_32 (output_bfd,
55fd94b0 3488 (sdyn == NULL ? 0
12d0ee4a
AM		 3489 : sdyn->output_section->vma + sdyn->output_offset),
3490 htab->sgotplt->contents);
55fd94b0
AM		 3491 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3492 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
12d0ee4a 3493 }
252b5132 3494
12d0ee4a
AM		 3495 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3496 }
8c37241b 3497
eea6121a 3498 if (htab->sgot && htab->sgot->size > 0)
8c37241b
JJ		 3499 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3500
b34976b6 3501 return TRUE;
252b5132
RH		 3502}
3503
4c45e5c9
JJ		 3504/* Return address for Ith PLT stub in section PLT, for relocation REL
3505 or (bfd_vma) -1 if it should not be included. */
3506
3507static bfd_vma
3508elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
3509 const arelent *rel ATTRIBUTE_UNUSED)
3510{
3511 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
3512}
3513
3514
252b5132
RH		 3515#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3516#define TARGET_LITTLE_NAME "elf32-i386"
3517#define ELF_ARCH bfd_arch_i386
3518#define ELF_MACHINE_CODE EM_386
3519#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 3520
3521#define elf_backend_can_gc_sections 1
51b64d56 3522#define elf_backend_can_refcount 1
252b5132
RH		 3523#define elf_backend_want_got_plt 1
3524#define elf_backend_plt_readonly 1
3525#define elf_backend_want_plt_sym 0
3526#define elf_backend_got_header_size 12
252b5132 3527
8c29f035
AM		 3528/* Support RELA for objdump of prelink objects. */
3529#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 3530#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3531
13ae64f3 3532#define bfd_elf32_mkobject elf_i386_mkobject
13ae64f3 3533
dd5724d5
AM		 3534#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3535#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3536#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3537
3538#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3539#define elf_backend_check_relocs elf_i386_check_relocs
0ac8d2ca 3540#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6725bdbf 3541#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
0ac8d2ca 3542#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 3543#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3544#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3545#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3546#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
c5fccbec
DJ		 3547#define elf_backend_grok_prstatus elf_i386_grok_prstatus
3548#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 3549#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 3550#define elf_backend_relocate_section elf_i386_relocate_section
3551#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4c45e5c9 3552#define elf_backend_plt_sym_val elf_i386_plt_sym_val
dd5724d5 3553
252b5132 3554#include "elf32-target.h"
2bc3c89a
AM		 3555
3556/* FreeBSD support. */
3557
3558#undef TARGET_LITTLE_SYM
3559#define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3560#undef TARGET_LITTLE_NAME
3561#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3562
3563/* The kernel recognizes executables as valid only if they carry a
3564 "FreeBSD" label in the ELF header. So we put this label on all
3565 executables and (for simplicity) also all other object files. */
3566
2bc3c89a 3567static void
55fd94b0
AM		 3568elf_i386_post_process_headers (bfd *abfd,
3569 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2bc3c89a
AM		 3570{
3571 Elf_Internal_Ehdr *i_ehdrp;
3572
3573 i_ehdrp = elf_elfheader (abfd);
3574
3575 /* Put an ABI label supported by FreeBSD >= 4.1. */
3576 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
3577#ifdef OLD_FREEBSD_ABI_LABEL
3578 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3579 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
caf47ea6 3580#endif
2bc3c89a
AM		 3581}
3582
3583#undef elf_backend_post_process_headers
571fe01f
NC		 3584#define elf_backend_post_process_headers elf_i386_post_process_headers
3585#undef elf32_bed
3586#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a
AM		 3587
3588#include "elf32-target.h"
eac338cf
PB		 3589
3590/* VxWorks support. */
3591
3592#undef TARGET_LITTLE_SYM
3593#define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3594#undef TARGET_LITTLE_NAME
3595#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3596
3597
3598/* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3599
3600static struct bfd_link_hash_table *
3601elf_i386_vxworks_link_hash_table_create (bfd *abfd)
3602{
3603 struct bfd_link_hash_table *ret;
3604 struct elf_i386_link_hash_table *htab;
3605
3606 ret = elf_i386_link_hash_table_create (abfd);
3607 if (ret)
3608 {
3609 htab = (struct elf_i386_link_hash_table *) ret;
3610 htab->is_vxworks = 1;
3611 htab->plt0_pad_byte = 0x90;
3612 }
3613
3614 return ret;
3615}
3616
3617
3618/* Tweak magic VxWorks symbols as they are written to the output file. */
3619static bfd_boolean
3620elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
3621 ATTRIBUTE_UNUSED,
3622 const char *name,
3623 Elf_Internal_Sym *sym,
3624 asection *input_sec ATTRIBUTE_UNUSED,
3625 struct elf_link_hash_entry *h
3626 ATTRIBUTE_UNUSED)
3627{
3628 /* Ignore the first dummy symbol. */
3629 if (!name)
3630 return TRUE;
3631
3632 return elf_vxworks_link_output_symbol_hook (name, sym);
3633}
3634
3635#undef elf_backend_post_process_headers
3636#undef bfd_elf32_bfd_link_hash_table_create
3637#define bfd_elf32_bfd_link_hash_table_create \
3638 elf_i386_vxworks_link_hash_table_create
3639#undef elf_backend_add_symbol_hook
3640#define elf_backend_add_symbol_hook \
3641 elf_vxworks_add_symbol_hook
3642#undef elf_backend_link_output_symbol_hook
3643#define elf_backend_link_output_symbol_hook \
3644 elf_i386_vxworks_link_output_symbol_hook
3645#undef elf_backend_emit_relocs
3646#define elf_backend_emit_relocs elf_vxworks_emit_relocs
3647#undef elf_backend_final_write_processing
3648#define elf_backend_final_write_processing \
3649 elf_vxworks_final_write_processing
3650
3651/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
3652 define it. */
3653#undef elf_backend_want_plt_sym
3654#define elf_backend_want_plt_sym 1
3655
3656#undef elf32_bed
3657#define elf32_bed elf32_i386_vxworks_bed
3658
3659#include "elf32-target.h"
GDB Binutils - Deliverables
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