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[thirdparty/binutils-gdb.git] / bfd / elf32-i386.c
1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "bfdlink.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf-nacl.h"
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
29 #include "objalloc.h"
30 #include "hashtab.h"
31 #include "dwarf2.h"
32
33 /* 386 uses REL relocations instead of RELA. */
34 #define USE_REL 1
35
36 #include "elf/i386.h"
37
38 static reloc_howto_type elf_howto_table[]=
39 {
40 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
41 bfd_elf_generic_reloc, "R_386_NONE",
42 TRUE, 0x00000000, 0x00000000, FALSE),
43 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_32",
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_PC32",
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_GOT32",
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_PLT32",
54 TRUE, 0xffffffff, 0xffffffff, TRUE),
55 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_COPY",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_RELATIVE",
66 TRUE, 0xffffffff, 0xffffffff, FALSE),
67 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_386_GOTOFF",
69 TRUE, 0xffffffff, 0xffffffff, FALSE),
70 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_386_GOTPC",
72 TRUE, 0xffffffff, 0xffffffff, TRUE),
73
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
78 #define R_386_standard (R_386_GOTPC + 1)
79 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
80
81 /* These relocs are a GNU extension. */
82 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_IE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_LE",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_TLS_GD",
96 TRUE, 0xffffffff, 0xffffffff, FALSE),
97 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_TLS_LDM",
99 TRUE, 0xffffffff, 0xffffffff, FALSE),
100 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_16",
102 TRUE, 0xffff, 0xffff, FALSE),
103 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_386_PC16",
105 TRUE, 0xffff, 0xffff, TRUE),
106 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_386_8",
108 TRUE, 0xff, 0xff, FALSE),
109 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
110 bfd_elf_generic_reloc, "R_386_PC8",
111 TRUE, 0xff, 0xff, TRUE),
112
113 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
115 /* These are common with Solaris TLS implementation. */
116 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
135 bfd_elf_generic_reloc, "R_386_SIZE32",
136 TRUE, 0xffffffff, 0xffffffff, FALSE),
137 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
142 FALSE, 0, 0, FALSE),
143 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_TLS_DESC",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
146 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_386_IRELATIVE",
148 TRUE, 0xffffffff, 0xffffffff, FALSE),
149
150 /* Another gap. */
151 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
153
154 /* GNU extension to record C++ vtable hierarchy. */
155 HOWTO (R_386_GNU_VTINHERIT, /* type */
156 0, /* rightshift */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
158 0, /* bitsize */
159 FALSE, /* pc_relative */
160 0, /* bitpos */
161 complain_overflow_dont, /* complain_on_overflow */
162 NULL, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
164 FALSE, /* partial_inplace */
165 0, /* src_mask */
166 0, /* dst_mask */
167 FALSE), /* pcrel_offset */
168
169 /* GNU extension to record C++ vtable member usage. */
170 HOWTO (R_386_GNU_VTENTRY, /* type */
171 0, /* rightshift */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
173 0, /* bitsize */
174 FALSE, /* pc_relative */
175 0, /* bitpos */
176 complain_overflow_dont, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
179 FALSE, /* partial_inplace */
180 0, /* src_mask */
181 0, /* dst_mask */
182 FALSE) /* pcrel_offset */
183
184 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
185
186 };
187
188 #ifdef DEBUG_GEN_RELOC
189 #define TRACE(str) \
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
191 #else
192 #define TRACE(str)
193 #endif
194
195 static reloc_howto_type *
196 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
197 bfd_reloc_code_real_type code)
198 {
199 switch (code)
200 {
201 case BFD_RELOC_NONE:
202 TRACE ("BFD_RELOC_NONE");
203 return &elf_howto_table[R_386_NONE];
204
205 case BFD_RELOC_32:
206 TRACE ("BFD_RELOC_32");
207 return &elf_howto_table[R_386_32];
208
209 case BFD_RELOC_CTOR:
210 TRACE ("BFD_RELOC_CTOR");
211 return &elf_howto_table[R_386_32];
212
213 case BFD_RELOC_32_PCREL:
214 TRACE ("BFD_RELOC_PC32");
215 return &elf_howto_table[R_386_PC32];
216
217 case BFD_RELOC_386_GOT32:
218 TRACE ("BFD_RELOC_386_GOT32");
219 return &elf_howto_table[R_386_GOT32];
220
221 case BFD_RELOC_386_PLT32:
222 TRACE ("BFD_RELOC_386_PLT32");
223 return &elf_howto_table[R_386_PLT32];
224
225 case BFD_RELOC_386_COPY:
226 TRACE ("BFD_RELOC_386_COPY");
227 return &elf_howto_table[R_386_COPY];
228
229 case BFD_RELOC_386_GLOB_DAT:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
231 return &elf_howto_table[R_386_GLOB_DAT];
232
233 case BFD_RELOC_386_JUMP_SLOT:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
235 return &elf_howto_table[R_386_JUMP_SLOT];
236
237 case BFD_RELOC_386_RELATIVE:
238 TRACE ("BFD_RELOC_386_RELATIVE");
239 return &elf_howto_table[R_386_RELATIVE];
240
241 case BFD_RELOC_386_GOTOFF:
242 TRACE ("BFD_RELOC_386_GOTOFF");
243 return &elf_howto_table[R_386_GOTOFF];
244
245 case BFD_RELOC_386_GOTPC:
246 TRACE ("BFD_RELOC_386_GOTPC");
247 return &elf_howto_table[R_386_GOTPC];
248
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
252 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
253
254 case BFD_RELOC_386_TLS_IE:
255 TRACE ("BFD_RELOC_386_TLS_IE");
256 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
257
258 case BFD_RELOC_386_TLS_GOTIE:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
260 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
261
262 case BFD_RELOC_386_TLS_LE:
263 TRACE ("BFD_RELOC_386_TLS_LE");
264 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
265
266 case BFD_RELOC_386_TLS_GD:
267 TRACE ("BFD_RELOC_386_TLS_GD");
268 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
269
270 case BFD_RELOC_386_TLS_LDM:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
272 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
273
274 case BFD_RELOC_16:
275 TRACE ("BFD_RELOC_16");
276 return &elf_howto_table[R_386_16 - R_386_ext_offset];
277
278 case BFD_RELOC_16_PCREL:
279 TRACE ("BFD_RELOC_16_PCREL");
280 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
281
282 case BFD_RELOC_8:
283 TRACE ("BFD_RELOC_8");
284 return &elf_howto_table[R_386_8 - R_386_ext_offset];
285
286 case BFD_RELOC_8_PCREL:
287 TRACE ("BFD_RELOC_8_PCREL");
288 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
289
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
293 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
294
295 case BFD_RELOC_386_TLS_IE_32:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
297 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
298
299 case BFD_RELOC_386_TLS_LE_32:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
301 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
302
303 case BFD_RELOC_386_TLS_DTPMOD32:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
305 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
306
307 case BFD_RELOC_386_TLS_DTPOFF32:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
309 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
310
311 case BFD_RELOC_386_TLS_TPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
313 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
314
315 case BFD_RELOC_SIZE32:
316 TRACE ("BFD_RELOC_SIZE32");
317 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
318
319 case BFD_RELOC_386_TLS_GOTDESC:
320 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
321 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
322
323 case BFD_RELOC_386_TLS_DESC_CALL:
324 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
325 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
326
327 case BFD_RELOC_386_TLS_DESC:
328 TRACE ("BFD_RELOC_386_TLS_DESC");
329 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
330
331 case BFD_RELOC_386_IRELATIVE:
332 TRACE ("BFD_RELOC_386_IRELATIVE");
333 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
334
335 case BFD_RELOC_VTABLE_INHERIT:
336 TRACE ("BFD_RELOC_VTABLE_INHERIT");
337 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
338
339 case BFD_RELOC_VTABLE_ENTRY:
340 TRACE ("BFD_RELOC_VTABLE_ENTRY");
341 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
342
343 default:
344 break;
345 }
346
347 TRACE ("Unknown");
348 return 0;
349 }
350
351 static reloc_howto_type *
352 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
353 const char *r_name)
354 {
355 unsigned int i;
356
357 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
358 if (elf_howto_table[i].name != NULL
359 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
360 return &elf_howto_table[i];
361
362 return NULL;
363 }
364
365 static reloc_howto_type *
366 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
367 {
368 unsigned int indx;
369
370 if ((indx = r_type) >= R_386_standard
371 && ((indx = r_type - R_386_ext_offset) - R_386_standard
372 >= R_386_ext - R_386_standard)
373 && ((indx = r_type - R_386_tls_offset) - R_386_ext
374 >= R_386_irelative - R_386_ext)
375 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
376 >= R_386_vt - R_386_irelative))
377 {
378 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
379 abfd, (int) r_type);
380 indx = R_386_NONE;
381 }
382 /* PR 17512: file: 0f67f69d. */
383 if (elf_howto_table [indx].type != r_type)
384 return NULL;
385 return &elf_howto_table[indx];
386 }
387
388 static void
389 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
390 arelent *cache_ptr,
391 Elf_Internal_Rela *dst)
392 {
393 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
394 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
395 }
396
397 /* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
402
403 static bfd_boolean
404 elf_i386_is_local_label_name (bfd *abfd, const char *name)
405 {
406 if (name[0] == '.' && name[1] == 'X')
407 return TRUE;
408
409 return _bfd_elf_is_local_label_name (abfd, name);
410 }
411 \f
412 /* Support for core dump NOTE sections. */
413
414 static bfd_boolean
415 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
416 {
417 int offset;
418 size_t size;
419
420 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
421 {
422 int pr_version = bfd_get_32 (abfd, note->descdata);
423
424 if (pr_version != 1)
425 return FALSE;
426
427 /* pr_cursig */
428 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
429
430 /* pr_pid */
431 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
432
433 /* pr_reg */
434 offset = 28;
435 size = bfd_get_32 (abfd, note->descdata + 8);
436 }
437 else
438 {
439 switch (note->descsz)
440 {
441 default:
442 return FALSE;
443
444 case 144: /* Linux/i386 */
445 /* pr_cursig */
446 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
447
448 /* pr_pid */
449 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
450
451 /* pr_reg */
452 offset = 72;
453 size = 68;
454
455 break;
456 }
457 }
458
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
461 size, note->descpos + offset);
462 }
463
464 static bfd_boolean
465 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
466 {
467 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
468 {
469 int pr_version = bfd_get_32 (abfd, note->descdata);
470
471 if (pr_version != 1)
472 return FALSE;
473
474 elf_tdata (abfd)->core->program
475 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
476 elf_tdata (abfd)->core->command
477 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
478 }
479 else
480 {
481 switch (note->descsz)
482 {
483 default:
484 return FALSE;
485
486 case 124: /* Linux/i386 elf_prpsinfo. */
487 elf_tdata (abfd)->core->pid
488 = bfd_get_32 (abfd, note->descdata + 12);
489 elf_tdata (abfd)->core->program
490 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
491 elf_tdata (abfd)->core->command
492 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
493 }
494 }
495
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
499 {
500 char *command = elf_tdata (abfd)->core->command;
501 int n = strlen (command);
502
503 if (0 < n && command[n - 1] == ' ')
504 command[n - 1] = '\0';
505 }
506
507 return TRUE;
508 }
509 \f
510 /* Functions for the i386 ELF linker.
511
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
514 following:
515
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
522
523
524 /* The name of the dynamic interpreter. This is put in the .interp
525 section. */
526
527 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
528
529 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
532 shared lib. */
533 #define ELIMINATE_COPY_RELOCS 1
534
535 /* The size in bytes of an entry in the procedure linkage table. */
536
537 #define PLT_ENTRY_SIZE 16
538
539 /* The first entry in an absolute procedure linkage table looks like
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
542
543 static const bfd_byte elf_i386_plt0_entry[12] =
544 {
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0 /* replaced with address of .got + 8. */
549 };
550
551 /* Subsequent entries in an absolute procedure linkage table look like
552 this. */
553
554 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
555 {
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
562 };
563
564 /* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
566
567 static const bfd_byte elf_i386_pic_plt0_entry[12] =
568 {
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
571 };
572
573 /* Subsequent entries in a PIC procedure linkage table look like this. */
574
575 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
576 {
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
583 };
584
585 /* Entries in the GOT procedure linkage table look like this. */
586
587 static const bfd_byte elf_i386_got_plt_entry[8] =
588 {
589 0xff, 0x25, /* jmp indirect */
590 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
591 0x66, 0x90 /* xchg %ax,%ax */
592 };
593
594 /* Entries in the PIC GOT procedure linkage table look like this. */
595
596 static const bfd_byte elf_i386_pic_got_plt_entry[8] =
597 {
598 0xff, 0xa3, /* jmp *offset(%ebx) */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
601 };
602
603 /* .eh_frame covering the .plt section. */
604
605 static const bfd_byte elf_i386_eh_frame_plt[] =
606 {
607 #define PLT_CIE_LENGTH 20
608 #define PLT_FDE_LENGTH 36
609 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
610 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
611 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
612 0, 0, 0, 0, /* CIE ID */
613 1, /* CIE version */
614 'z', 'R', 0, /* Augmentation string */
615 1, /* Code alignment factor */
616 0x7c, /* Data alignment factor */
617 8, /* Return address column */
618 1, /* Augmentation size */
619 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
620 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
621 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
622 DW_CFA_nop, DW_CFA_nop,
623
624 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
625 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
626 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
627 0, 0, 0, 0, /* .plt size goes here */
628 0, /* Augmentation size */
629 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
630 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
631 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
632 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
633 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
634 11, /* Block length */
635 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
636 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
637 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
638 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
639 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
640 };
641
642 struct elf_i386_plt_layout
643 {
644 /* The first entry in an absolute procedure linkage table looks like this. */
645 const bfd_byte *plt0_entry;
646 unsigned int plt0_entry_size;
647
648 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
649 unsigned int plt0_got1_offset;
650 unsigned int plt0_got2_offset;
651
652 /* Later entries in an absolute procedure linkage table look like this. */
653 const bfd_byte *plt_entry;
654 unsigned int plt_entry_size;
655
656 /* Offsets into plt_entry that are to be replaced with... */
657 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
658 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
659 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
660
661 /* Offset into plt_entry where the initial value of the GOT entry points. */
662 unsigned int plt_lazy_offset;
663
664 /* The first entry in a PIC procedure linkage table looks like this. */
665 const bfd_byte *pic_plt0_entry;
666
667 /* Subsequent entries in a PIC procedure linkage table look like this. */
668 const bfd_byte *pic_plt_entry;
669
670 /* .eh_frame covering the .plt section. */
671 const bfd_byte *eh_frame_plt;
672 unsigned int eh_frame_plt_size;
673 };
674
675 #define GET_PLT_ENTRY_SIZE(abfd) \
676 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
677
678 /* These are the standard parameters. */
679 static const struct elf_i386_plt_layout elf_i386_plt =
680 {
681 elf_i386_plt0_entry, /* plt0_entry */
682 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
683 2, /* plt0_got1_offset */
684 8, /* plt0_got2_offset */
685 elf_i386_plt_entry, /* plt_entry */
686 PLT_ENTRY_SIZE, /* plt_entry_size */
687 2, /* plt_got_offset */
688 7, /* plt_reloc_offset */
689 12, /* plt_plt_offset */
690 6, /* plt_lazy_offset */
691 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
692 elf_i386_pic_plt_entry, /* pic_plt_entry */
693 elf_i386_eh_frame_plt, /* eh_frame_plt */
694 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
695 };
696 \f
697
698 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
699 for the PLTResolve stub and then for each PLT entry. */
700 #define PLTRESOLVE_RELOCS_SHLIB 0
701 #define PLTRESOLVE_RELOCS 2
702 #define PLT_NON_JUMP_SLOT_RELOCS 2
703
704 /* Architecture-specific backend data for i386. */
705
706 struct elf_i386_backend_data
707 {
708 /* Parameters describing PLT generation. */
709 const struct elf_i386_plt_layout *plt;
710
711 /* Value used to fill the unused bytes of the first PLT entry. */
712 bfd_byte plt0_pad_byte;
713
714 /* True if the target system is VxWorks. */
715 int is_vxworks;
716 };
717
718 #define get_elf_i386_backend_data(abfd) \
719 ((const struct elf_i386_backend_data *) \
720 get_elf_backend_data (abfd)->arch_data)
721
722 /* These are the standard parameters. */
723 static const struct elf_i386_backend_data elf_i386_arch_bed =
724 {
725 &elf_i386_plt, /* plt */
726 0, /* plt0_pad_byte */
727 0, /* is_vxworks */
728 };
729
730 #define elf_backend_arch_data &elf_i386_arch_bed
731
732 /* i386 ELF linker hash entry. */
733
734 struct elf_i386_link_hash_entry
735 {
736 struct elf_link_hash_entry elf;
737
738 /* Track dynamic relocs copied for this symbol. */
739 struct elf_dyn_relocs *dyn_relocs;
740
741 #define GOT_UNKNOWN 0
742 #define GOT_NORMAL 1
743 #define GOT_TLS_GD 2
744 #define GOT_TLS_IE 4
745 #define GOT_TLS_IE_POS 5
746 #define GOT_TLS_IE_NEG 6
747 #define GOT_TLS_IE_BOTH 7
748 #define GOT_TLS_GDESC 8
749 #define GOT_TLS_GD_BOTH_P(type) \
750 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
751 #define GOT_TLS_GD_P(type) \
752 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
753 #define GOT_TLS_GDESC_P(type) \
754 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
755 #define GOT_TLS_GD_ANY_P(type) \
756 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
757 unsigned char tls_type;
758
759 /* Information about the GOT PLT entry. Filled when there are both
760 GOT and PLT relocations against the same function. */
761 union gotplt_union plt_got;
762
763 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
764 starting at the end of the jump table. */
765 bfd_vma tlsdesc_got;
766 };
767
768 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
769
770 struct elf_i386_obj_tdata
771 {
772 struct elf_obj_tdata root;
773
774 /* tls_type for each local got entry. */
775 char *local_got_tls_type;
776
777 /* GOTPLT entries for TLS descriptors. */
778 bfd_vma *local_tlsdesc_gotent;
779 };
780
781 #define elf_i386_tdata(abfd) \
782 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
783
784 #define elf_i386_local_got_tls_type(abfd) \
785 (elf_i386_tdata (abfd)->local_got_tls_type)
786
787 #define elf_i386_local_tlsdesc_gotent(abfd) \
788 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
789
790 #define is_i386_elf(bfd) \
791 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
792 && elf_tdata (bfd) != NULL \
793 && elf_object_id (bfd) == I386_ELF_DATA)
794
795 static bfd_boolean
796 elf_i386_mkobject (bfd *abfd)
797 {
798 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
799 I386_ELF_DATA);
800 }
801
802 /* i386 ELF linker hash table. */
803
804 struct elf_i386_link_hash_table
805 {
806 struct elf_link_hash_table elf;
807
808 /* Short-cuts to get to dynamic linker sections. */
809 asection *sdynbss;
810 asection *srelbss;
811 asection *plt_eh_frame;
812 asection *plt_got;
813
814 union
815 {
816 bfd_signed_vma refcount;
817 bfd_vma offset;
818 } tls_ldm_got;
819
820 /* The amount of space used by the reserved portion of the sgotplt
821 section, plus whatever space is used by the jump slots. */
822 bfd_vma sgotplt_jump_table_size;
823
824 /* Small local sym cache. */
825 struct sym_cache sym_cache;
826
827 /* _TLS_MODULE_BASE_ symbol. */
828 struct bfd_link_hash_entry *tls_module_base;
829
830 /* Used by local STT_GNU_IFUNC symbols. */
831 htab_t loc_hash_table;
832 void * loc_hash_memory;
833
834 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
835 asection *srelplt2;
836
837 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
838 bfd_vma next_tls_desc_index;
839
840 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
841 bfd_vma next_jump_slot_index;
842
843 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
844 bfd_vma next_irelative_index;
845 };
846
847 /* Get the i386 ELF linker hash table from a link_info structure. */
848
849 #define elf_i386_hash_table(p) \
850 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
851 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
852
853 #define elf_i386_compute_jump_table_size(htab) \
854 ((htab)->elf.srelplt->reloc_count * 4)
855
856 /* Create an entry in an i386 ELF linker hash table. */
857
858 static struct bfd_hash_entry *
859 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
860 struct bfd_hash_table *table,
861 const char *string)
862 {
863 /* Allocate the structure if it has not already been allocated by a
864 subclass. */
865 if (entry == NULL)
866 {
867 entry = (struct bfd_hash_entry *)
868 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
869 if (entry == NULL)
870 return entry;
871 }
872
873 /* Call the allocation method of the superclass. */
874 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
875 if (entry != NULL)
876 {
877 struct elf_i386_link_hash_entry *eh;
878
879 eh = (struct elf_i386_link_hash_entry *) entry;
880 eh->dyn_relocs = NULL;
881 eh->tls_type = GOT_UNKNOWN;
882 eh->plt_got.offset = (bfd_vma) -1;
883 eh->tlsdesc_got = (bfd_vma) -1;
884 }
885
886 return entry;
887 }
888
889 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
890 for local symbol so that we can handle local STT_GNU_IFUNC symbols
891 as global symbol. We reuse indx and dynstr_index for local symbol
892 hash since they aren't used by global symbols in this backend. */
893
894 static hashval_t
895 elf_i386_local_htab_hash (const void *ptr)
896 {
897 struct elf_link_hash_entry *h
898 = (struct elf_link_hash_entry *) ptr;
899 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
900 }
901
902 /* Compare local hash entries. */
903
904 static int
905 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
906 {
907 struct elf_link_hash_entry *h1
908 = (struct elf_link_hash_entry *) ptr1;
909 struct elf_link_hash_entry *h2
910 = (struct elf_link_hash_entry *) ptr2;
911
912 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
913 }
914
915 /* Find and/or create a hash entry for local symbol. */
916
917 static struct elf_link_hash_entry *
918 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
919 bfd *abfd, const Elf_Internal_Rela *rel,
920 bfd_boolean create)
921 {
922 struct elf_i386_link_hash_entry e, *ret;
923 asection *sec = abfd->sections;
924 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
925 ELF32_R_SYM (rel->r_info));
926 void **slot;
927
928 e.elf.indx = sec->id;
929 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
930 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
931 create ? INSERT : NO_INSERT);
932
933 if (!slot)
934 return NULL;
935
936 if (*slot)
937 {
938 ret = (struct elf_i386_link_hash_entry *) *slot;
939 return &ret->elf;
940 }
941
942 ret = (struct elf_i386_link_hash_entry *)
943 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
944 sizeof (struct elf_i386_link_hash_entry));
945 if (ret)
946 {
947 memset (ret, 0, sizeof (*ret));
948 ret->elf.indx = sec->id;
949 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
950 ret->elf.dynindx = -1;
951 ret->plt_got.offset = (bfd_vma) -1;
952 *slot = ret;
953 }
954 return &ret->elf;
955 }
956
957 /* Destroy an i386 ELF linker hash table. */
958
959 static void
960 elf_i386_link_hash_table_free (bfd *obfd)
961 {
962 struct elf_i386_link_hash_table *htab
963 = (struct elf_i386_link_hash_table *) obfd->link.hash;
964
965 if (htab->loc_hash_table)
966 htab_delete (htab->loc_hash_table);
967 if (htab->loc_hash_memory)
968 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
969 _bfd_elf_link_hash_table_free (obfd);
970 }
971
972 /* Create an i386 ELF linker hash table. */
973
974 static struct bfd_link_hash_table *
975 elf_i386_link_hash_table_create (bfd *abfd)
976 {
977 struct elf_i386_link_hash_table *ret;
978 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
979
980 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
981 if (ret == NULL)
982 return NULL;
983
984 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
985 elf_i386_link_hash_newfunc,
986 sizeof (struct elf_i386_link_hash_entry),
987 I386_ELF_DATA))
988 {
989 free (ret);
990 return NULL;
991 }
992
993 ret->loc_hash_table = htab_try_create (1024,
994 elf_i386_local_htab_hash,
995 elf_i386_local_htab_eq,
996 NULL);
997 ret->loc_hash_memory = objalloc_create ();
998 if (!ret->loc_hash_table || !ret->loc_hash_memory)
999 {
1000 elf_i386_link_hash_table_free (abfd);
1001 return NULL;
1002 }
1003 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1004
1005 return &ret->elf.root;
1006 }
1007
1008 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1009 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1010 hash table. */
1011
1012 static bfd_boolean
1013 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1014 {
1015 struct elf_i386_link_hash_table *htab;
1016
1017 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1018 return FALSE;
1019
1020 htab = elf_i386_hash_table (info);
1021 if (htab == NULL)
1022 return FALSE;
1023
1024 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1025 if (!info->shared)
1026 htab->srelbss = bfd_get_linker_section (dynobj, ".rel.bss");
1027
1028 if (!htab->sdynbss
1029 || (!info->shared && !htab->srelbss))
1030 abort ();
1031
1032 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1033 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1034 &htab->srelplt2))
1035 return FALSE;
1036
1037 if (!info->no_ld_generated_unwind_info
1038 && htab->plt_eh_frame == NULL
1039 && htab->elf.splt != NULL)
1040 {
1041 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1042 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1043 | SEC_LINKER_CREATED);
1044 htab->plt_eh_frame
1045 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1046 if (htab->plt_eh_frame == NULL
1047 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1048 return FALSE;
1049 }
1050
1051 return TRUE;
1052 }
1053
1054 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1055
1056 static void
1057 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1058 struct elf_link_hash_entry *dir,
1059 struct elf_link_hash_entry *ind)
1060 {
1061 struct elf_i386_link_hash_entry *edir, *eind;
1062
1063 edir = (struct elf_i386_link_hash_entry *) dir;
1064 eind = (struct elf_i386_link_hash_entry *) ind;
1065
1066 if (eind->dyn_relocs != NULL)
1067 {
1068 if (edir->dyn_relocs != NULL)
1069 {
1070 struct elf_dyn_relocs **pp;
1071 struct elf_dyn_relocs *p;
1072
1073 /* Add reloc counts against the indirect sym to the direct sym
1074 list. Merge any entries against the same section. */
1075 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1076 {
1077 struct elf_dyn_relocs *q;
1078
1079 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1080 if (q->sec == p->sec)
1081 {
1082 q->pc_count += p->pc_count;
1083 q->count += p->count;
1084 *pp = p->next;
1085 break;
1086 }
1087 if (q == NULL)
1088 pp = &p->next;
1089 }
1090 *pp = edir->dyn_relocs;
1091 }
1092
1093 edir->dyn_relocs = eind->dyn_relocs;
1094 eind->dyn_relocs = NULL;
1095 }
1096
1097 if (ind->root.type == bfd_link_hash_indirect
1098 && dir->got.refcount <= 0)
1099 {
1100 edir->tls_type = eind->tls_type;
1101 eind->tls_type = GOT_UNKNOWN;
1102 }
1103
1104 if (ELIMINATE_COPY_RELOCS
1105 && ind->root.type != bfd_link_hash_indirect
1106 && dir->dynamic_adjusted)
1107 {
1108 /* If called to transfer flags for a weakdef during processing
1109 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1110 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1111 dir->ref_dynamic |= ind->ref_dynamic;
1112 dir->ref_regular |= ind->ref_regular;
1113 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1114 dir->needs_plt |= ind->needs_plt;
1115 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1116 }
1117 else
1118 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1119 }
1120
1121 /* Return TRUE if the TLS access code sequence support transition
1122 from R_TYPE. */
1123
1124 static bfd_boolean
1125 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1126 bfd_byte *contents,
1127 Elf_Internal_Shdr *symtab_hdr,
1128 struct elf_link_hash_entry **sym_hashes,
1129 unsigned int r_type,
1130 const Elf_Internal_Rela *rel,
1131 const Elf_Internal_Rela *relend)
1132 {
1133 unsigned int val, type;
1134 unsigned long r_symndx;
1135 struct elf_link_hash_entry *h;
1136 bfd_vma offset;
1137
1138 /* Get the section contents. */
1139 if (contents == NULL)
1140 {
1141 if (elf_section_data (sec)->this_hdr.contents != NULL)
1142 contents = elf_section_data (sec)->this_hdr.contents;
1143 else
1144 {
1145 /* FIXME: How to better handle error condition? */
1146 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1147 return FALSE;
1148
1149 /* Cache the section contents for elf_link_input_bfd. */
1150 elf_section_data (sec)->this_hdr.contents = contents;
1151 }
1152 }
1153
1154 offset = rel->r_offset;
1155 switch (r_type)
1156 {
1157 case R_386_TLS_GD:
1158 case R_386_TLS_LDM:
1159 if (offset < 2 || (rel + 1) >= relend)
1160 return FALSE;
1161
1162 type = bfd_get_8 (abfd, contents + offset - 2);
1163 if (r_type == R_386_TLS_GD)
1164 {
1165 /* Check transition from GD access model. Only
1166 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1167 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1168 can transit to different access model. */
1169 if ((offset + 10) > sec->size ||
1170 (type != 0x8d && type != 0x04))
1171 return FALSE;
1172
1173 val = bfd_get_8 (abfd, contents + offset - 1);
1174 if (type == 0x04)
1175 {
1176 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1177 if (offset < 3)
1178 return FALSE;
1179
1180 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1181 return FALSE;
1182
1183 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1184 return FALSE;
1185 }
1186 else
1187 {
1188 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1189 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1190 return FALSE;
1191
1192 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1193 return FALSE;
1194 }
1195 }
1196 else
1197 {
1198 /* Check transition from LD access model. Only
1199 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1200 can transit to different access model. */
1201 if (type != 0x8d || (offset + 9) > sec->size)
1202 return FALSE;
1203
1204 val = bfd_get_8 (abfd, contents + offset - 1);
1205 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1206 return FALSE;
1207 }
1208
1209 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1210 return FALSE;
1211
1212 r_symndx = ELF32_R_SYM (rel[1].r_info);
1213 if (r_symndx < symtab_hdr->sh_info)
1214 return FALSE;
1215
1216 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1217 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1218 may be versioned. */
1219 return (h != NULL
1220 && h->root.root.string != NULL
1221 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1222 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1223 && (strncmp (h->root.root.string, "___tls_get_addr",
1224 15) == 0));
1225
1226 case R_386_TLS_IE:
1227 /* Check transition from IE access model:
1228 movl foo@indntpoff(%rip), %eax
1229 movl foo@indntpoff(%rip), %reg
1230 addl foo@indntpoff(%rip), %reg
1231 */
1232
1233 if (offset < 1 || (offset + 4) > sec->size)
1234 return FALSE;
1235
1236 /* Check "movl foo@tpoff(%rip), %eax" first. */
1237 val = bfd_get_8 (abfd, contents + offset - 1);
1238 if (val == 0xa1)
1239 return TRUE;
1240
1241 if (offset < 2)
1242 return FALSE;
1243
1244 /* Check movl|addl foo@tpoff(%rip), %reg. */
1245 type = bfd_get_8 (abfd, contents + offset - 2);
1246 return ((type == 0x8b || type == 0x03)
1247 && (val & 0xc7) == 0x05);
1248
1249 case R_386_TLS_GOTIE:
1250 case R_386_TLS_IE_32:
1251 /* Check transition from {IE_32,GOTIE} access model:
1252 subl foo@{tpoff,gontoff}(%reg1), %reg2
1253 movl foo@{tpoff,gontoff}(%reg1), %reg2
1254 addl foo@{tpoff,gontoff}(%reg1), %reg2
1255 */
1256
1257 if (offset < 2 || (offset + 4) > sec->size)
1258 return FALSE;
1259
1260 val = bfd_get_8 (abfd, contents + offset - 1);
1261 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1262 return FALSE;
1263
1264 type = bfd_get_8 (abfd, contents + offset - 2);
1265 return type == 0x8b || type == 0x2b || type == 0x03;
1266
1267 case R_386_TLS_GOTDESC:
1268 /* Check transition from GDesc access model:
1269 leal x@tlsdesc(%ebx), %eax
1270
1271 Make sure it's a leal adding ebx to a 32-bit offset
1272 into any register, although it's probably almost always
1273 going to be eax. */
1274
1275 if (offset < 2 || (offset + 4) > sec->size)
1276 return FALSE;
1277
1278 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1279 return FALSE;
1280
1281 val = bfd_get_8 (abfd, contents + offset - 1);
1282 return (val & 0xc7) == 0x83;
1283
1284 case R_386_TLS_DESC_CALL:
1285 /* Check transition from GDesc access model:
1286 call *x@tlsdesc(%rax)
1287 */
1288 if (offset + 2 <= sec->size)
1289 {
1290 /* Make sure that it's a call *x@tlsdesc(%rax). */
1291 static const unsigned char call[] = { 0xff, 0x10 };
1292 return memcmp (contents + offset, call, 2) == 0;
1293 }
1294
1295 return FALSE;
1296
1297 default:
1298 abort ();
1299 }
1300 }
1301
1302 /* Return TRUE if the TLS access transition is OK or no transition
1303 will be performed. Update R_TYPE if there is a transition. */
1304
1305 static bfd_boolean
1306 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1307 asection *sec, bfd_byte *contents,
1308 Elf_Internal_Shdr *symtab_hdr,
1309 struct elf_link_hash_entry **sym_hashes,
1310 unsigned int *r_type, int tls_type,
1311 const Elf_Internal_Rela *rel,
1312 const Elf_Internal_Rela *relend,
1313 struct elf_link_hash_entry *h,
1314 unsigned long r_symndx)
1315 {
1316 unsigned int from_type = *r_type;
1317 unsigned int to_type = from_type;
1318 bfd_boolean check = TRUE;
1319
1320 /* Skip TLS transition for functions. */
1321 if (h != NULL
1322 && (h->type == STT_FUNC
1323 || h->type == STT_GNU_IFUNC))
1324 return TRUE;
1325
1326 switch (from_type)
1327 {
1328 case R_386_TLS_GD:
1329 case R_386_TLS_GOTDESC:
1330 case R_386_TLS_DESC_CALL:
1331 case R_386_TLS_IE_32:
1332 case R_386_TLS_IE:
1333 case R_386_TLS_GOTIE:
1334 if (info->executable)
1335 {
1336 if (h == NULL)
1337 to_type = R_386_TLS_LE_32;
1338 else if (from_type != R_386_TLS_IE
1339 && from_type != R_386_TLS_GOTIE)
1340 to_type = R_386_TLS_IE_32;
1341 }
1342
1343 /* When we are called from elf_i386_relocate_section, CONTENTS
1344 isn't NULL and there may be additional transitions based on
1345 TLS_TYPE. */
1346 if (contents != NULL)
1347 {
1348 unsigned int new_to_type = to_type;
1349
1350 if (info->executable
1351 && h != NULL
1352 && h->dynindx == -1
1353 && (tls_type & GOT_TLS_IE))
1354 new_to_type = R_386_TLS_LE_32;
1355
1356 if (to_type == R_386_TLS_GD
1357 || to_type == R_386_TLS_GOTDESC
1358 || to_type == R_386_TLS_DESC_CALL)
1359 {
1360 if (tls_type == GOT_TLS_IE_POS)
1361 new_to_type = R_386_TLS_GOTIE;
1362 else if (tls_type & GOT_TLS_IE)
1363 new_to_type = R_386_TLS_IE_32;
1364 }
1365
1366 /* We checked the transition before when we were called from
1367 elf_i386_check_relocs. We only want to check the new
1368 transition which hasn't been checked before. */
1369 check = new_to_type != to_type && from_type == to_type;
1370 to_type = new_to_type;
1371 }
1372
1373 break;
1374
1375 case R_386_TLS_LDM:
1376 if (info->executable)
1377 to_type = R_386_TLS_LE_32;
1378 break;
1379
1380 default:
1381 return TRUE;
1382 }
1383
1384 /* Return TRUE if there is no transition. */
1385 if (from_type == to_type)
1386 return TRUE;
1387
1388 /* Check if the transition can be performed. */
1389 if (check
1390 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1391 symtab_hdr, sym_hashes,
1392 from_type, rel, relend))
1393 {
1394 reloc_howto_type *from, *to;
1395 const char *name;
1396
1397 from = elf_i386_rtype_to_howto (abfd, from_type);
1398 to = elf_i386_rtype_to_howto (abfd, to_type);
1399
1400 if (h)
1401 name = h->root.root.string;
1402 else
1403 {
1404 struct elf_i386_link_hash_table *htab;
1405
1406 htab = elf_i386_hash_table (info);
1407 if (htab == NULL)
1408 name = "*unknown*";
1409 else
1410 {
1411 Elf_Internal_Sym *isym;
1412
1413 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1414 abfd, r_symndx);
1415 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1416 }
1417 }
1418
1419 (*_bfd_error_handler)
1420 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1421 "in section `%A' failed"),
1422 abfd, sec, from->name, to->name, name,
1423 (unsigned long) rel->r_offset);
1424 bfd_set_error (bfd_error_bad_value);
1425 return FALSE;
1426 }
1427
1428 *r_type = to_type;
1429 return TRUE;
1430 }
1431
1432 /* Look through the relocs for a section during the first phase, and
1433 calculate needed space in the global offset table, procedure linkage
1434 table, and dynamic reloc sections. */
1435
1436 static bfd_boolean
1437 elf_i386_check_relocs (bfd *abfd,
1438 struct bfd_link_info *info,
1439 asection *sec,
1440 const Elf_Internal_Rela *relocs)
1441 {
1442 struct elf_i386_link_hash_table *htab;
1443 Elf_Internal_Shdr *symtab_hdr;
1444 struct elf_link_hash_entry **sym_hashes;
1445 const Elf_Internal_Rela *rel;
1446 const Elf_Internal_Rela *rel_end;
1447 asection *sreloc;
1448 bfd_boolean use_plt_got;
1449
1450 if (info->relocatable)
1451 return TRUE;
1452
1453 BFD_ASSERT (is_i386_elf (abfd));
1454
1455 htab = elf_i386_hash_table (info);
1456 if (htab == NULL)
1457 return FALSE;
1458
1459 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1460 && (get_elf_i386_backend_data (abfd)
1461 == &elf_i386_arch_bed));
1462
1463 symtab_hdr = &elf_symtab_hdr (abfd);
1464 sym_hashes = elf_sym_hashes (abfd);
1465
1466 sreloc = NULL;
1467
1468 rel_end = relocs + sec->reloc_count;
1469 for (rel = relocs; rel < rel_end; rel++)
1470 {
1471 unsigned int r_type;
1472 unsigned long r_symndx;
1473 struct elf_link_hash_entry *h;
1474 Elf_Internal_Sym *isym;
1475 const char *name;
1476 bfd_boolean size_reloc;
1477
1478 r_symndx = ELF32_R_SYM (rel->r_info);
1479 r_type = ELF32_R_TYPE (rel->r_info);
1480
1481 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1482 {
1483 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1484 abfd,
1485 r_symndx);
1486 return FALSE;
1487 }
1488
1489 if (r_symndx < symtab_hdr->sh_info)
1490 {
1491 /* A local symbol. */
1492 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1493 abfd, r_symndx);
1494 if (isym == NULL)
1495 return FALSE;
1496
1497 /* Check relocation against local STT_GNU_IFUNC symbol. */
1498 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1499 {
1500 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1501 if (h == NULL)
1502 return FALSE;
1503
1504 /* Fake a STT_GNU_IFUNC symbol. */
1505 h->type = STT_GNU_IFUNC;
1506 h->def_regular = 1;
1507 h->ref_regular = 1;
1508 h->forced_local = 1;
1509 h->root.type = bfd_link_hash_defined;
1510 }
1511 else
1512 h = NULL;
1513 }
1514 else
1515 {
1516 isym = NULL;
1517 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1518 while (h->root.type == bfd_link_hash_indirect
1519 || h->root.type == bfd_link_hash_warning)
1520 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1521 }
1522
1523 if (h != NULL)
1524 {
1525 /* Create the ifunc sections for static executables. If we
1526 never see an indirect function symbol nor we are building
1527 a static executable, those sections will be empty and
1528 won't appear in output. */
1529 switch (r_type)
1530 {
1531 default:
1532 break;
1533
1534 case R_386_32:
1535 case R_386_PC32:
1536 case R_386_PLT32:
1537 case R_386_GOT32:
1538 case R_386_GOTOFF:
1539 if (htab->elf.dynobj == NULL)
1540 htab->elf.dynobj = abfd;
1541 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1542 return FALSE;
1543 break;
1544 }
1545
1546 /* It is referenced by a non-shared object. */
1547 h->ref_regular = 1;
1548 h->root.non_ir_ref = 1;
1549 }
1550
1551 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1552 symtab_hdr, sym_hashes,
1553 &r_type, GOT_UNKNOWN,
1554 rel, rel_end, h, r_symndx))
1555 return FALSE;
1556
1557 switch (r_type)
1558 {
1559 case R_386_TLS_LDM:
1560 htab->tls_ldm_got.refcount += 1;
1561 goto create_got;
1562
1563 case R_386_PLT32:
1564 /* This symbol requires a procedure linkage table entry. We
1565 actually build the entry in adjust_dynamic_symbol,
1566 because this might be a case of linking PIC code which is
1567 never referenced by a dynamic object, in which case we
1568 don't need to generate a procedure linkage table entry
1569 after all. */
1570
1571 /* If this is a local symbol, we resolve it directly without
1572 creating a procedure linkage table entry. */
1573 if (h == NULL)
1574 continue;
1575
1576 h->needs_plt = 1;
1577 h->plt.refcount += 1;
1578 break;
1579
1580 case R_386_SIZE32:
1581 size_reloc = TRUE;
1582 goto do_size;
1583
1584 case R_386_TLS_IE_32:
1585 case R_386_TLS_IE:
1586 case R_386_TLS_GOTIE:
1587 if (!info->executable)
1588 info->flags |= DF_STATIC_TLS;
1589 /* Fall through */
1590
1591 case R_386_GOT32:
1592 case R_386_TLS_GD:
1593 case R_386_TLS_GOTDESC:
1594 case R_386_TLS_DESC_CALL:
1595 /* This symbol requires a global offset table entry. */
1596 {
1597 int tls_type, old_tls_type;
1598
1599 switch (r_type)
1600 {
1601 default:
1602 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1603 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1604 case R_386_TLS_GOTDESC:
1605 case R_386_TLS_DESC_CALL:
1606 tls_type = GOT_TLS_GDESC; break;
1607 case R_386_TLS_IE_32:
1608 if (ELF32_R_TYPE (rel->r_info) == r_type)
1609 tls_type = GOT_TLS_IE_NEG;
1610 else
1611 /* If this is a GD->IE transition, we may use either of
1612 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1613 tls_type = GOT_TLS_IE;
1614 break;
1615 case R_386_TLS_IE:
1616 case R_386_TLS_GOTIE:
1617 tls_type = GOT_TLS_IE_POS; break;
1618 }
1619
1620 if (h != NULL)
1621 {
1622 h->got.refcount += 1;
1623 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1624 }
1625 else
1626 {
1627 bfd_signed_vma *local_got_refcounts;
1628
1629 /* This is a global offset table entry for a local symbol. */
1630 local_got_refcounts = elf_local_got_refcounts (abfd);
1631 if (local_got_refcounts == NULL)
1632 {
1633 bfd_size_type size;
1634
1635 size = symtab_hdr->sh_info;
1636 size *= (sizeof (bfd_signed_vma)
1637 + sizeof (bfd_vma) + sizeof(char));
1638 local_got_refcounts = (bfd_signed_vma *)
1639 bfd_zalloc (abfd, size);
1640 if (local_got_refcounts == NULL)
1641 return FALSE;
1642 elf_local_got_refcounts (abfd) = local_got_refcounts;
1643 elf_i386_local_tlsdesc_gotent (abfd)
1644 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1645 elf_i386_local_got_tls_type (abfd)
1646 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1647 }
1648 local_got_refcounts[r_symndx] += 1;
1649 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1650 }
1651
1652 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1653 tls_type |= old_tls_type;
1654 /* If a TLS symbol is accessed using IE at least once,
1655 there is no point to use dynamic model for it. */
1656 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1657 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1658 || (tls_type & GOT_TLS_IE) == 0))
1659 {
1660 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1661 tls_type = old_tls_type;
1662 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1663 && GOT_TLS_GD_ANY_P (tls_type))
1664 tls_type |= old_tls_type;
1665 else
1666 {
1667 if (h)
1668 name = h->root.root.string;
1669 else
1670 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1671 NULL);
1672 (*_bfd_error_handler)
1673 (_("%B: `%s' accessed both as normal and "
1674 "thread local symbol"),
1675 abfd, name);
1676 bfd_set_error (bfd_error_bad_value);
1677 return FALSE;
1678 }
1679 }
1680
1681 if (old_tls_type != tls_type)
1682 {
1683 if (h != NULL)
1684 elf_i386_hash_entry (h)->tls_type = tls_type;
1685 else
1686 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1687 }
1688 }
1689 /* Fall through */
1690
1691 case R_386_GOTOFF:
1692 case R_386_GOTPC:
1693 create_got:
1694 if (htab->elf.sgot == NULL)
1695 {
1696 if (htab->elf.dynobj == NULL)
1697 htab->elf.dynobj = abfd;
1698 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1699 return FALSE;
1700 }
1701 if (r_type != R_386_TLS_IE)
1702 break;
1703 /* Fall through */
1704
1705 case R_386_TLS_LE_32:
1706 case R_386_TLS_LE:
1707 if (info->executable)
1708 break;
1709 info->flags |= DF_STATIC_TLS;
1710 /* Fall through */
1711
1712 case R_386_32:
1713 case R_386_PC32:
1714 if (h != NULL && info->executable)
1715 {
1716 /* If this reloc is in a read-only section, we might
1717 need a copy reloc. We can't check reliably at this
1718 stage whether the section is read-only, as input
1719 sections have not yet been mapped to output sections.
1720 Tentatively set the flag for now, and correct in
1721 adjust_dynamic_symbol. */
1722 h->non_got_ref = 1;
1723
1724 /* We may need a .plt entry if the function this reloc
1725 refers to is in a shared lib. */
1726 h->plt.refcount += 1;
1727 if (r_type != R_386_PC32)
1728 h->pointer_equality_needed = 1;
1729 }
1730
1731 size_reloc = FALSE;
1732 do_size:
1733 /* If we are creating a shared library, and this is a reloc
1734 against a global symbol, or a non PC relative reloc
1735 against a local symbol, then we need to copy the reloc
1736 into the shared library. However, if we are linking with
1737 -Bsymbolic, we do not need to copy a reloc against a
1738 global symbol which is defined in an object we are
1739 including in the link (i.e., DEF_REGULAR is set). At
1740 this point we have not seen all the input files, so it is
1741 possible that DEF_REGULAR is not set now but will be set
1742 later (it is never cleared). In case of a weak definition,
1743 DEF_REGULAR may be cleared later by a strong definition in
1744 a shared library. We account for that possibility below by
1745 storing information in the relocs_copied field of the hash
1746 table entry. A similar situation occurs when creating
1747 shared libraries and symbol visibility changes render the
1748 symbol local.
1749
1750 If on the other hand, we are creating an executable, we
1751 may need to keep relocations for symbols satisfied by a
1752 dynamic library if we manage to avoid copy relocs for the
1753 symbol. */
1754 if ((info->shared
1755 && (sec->flags & SEC_ALLOC) != 0
1756 && (r_type != R_386_PC32
1757 || (h != NULL
1758 && (! SYMBOLIC_BIND (info, h)
1759 || h->root.type == bfd_link_hash_defweak
1760 || !h->def_regular))))
1761 || (ELIMINATE_COPY_RELOCS
1762 && !info->shared
1763 && (sec->flags & SEC_ALLOC) != 0
1764 && h != NULL
1765 && (h->root.type == bfd_link_hash_defweak
1766 || !h->def_regular)))
1767 {
1768 struct elf_dyn_relocs *p;
1769 struct elf_dyn_relocs **head;
1770
1771 /* We must copy these reloc types into the output file.
1772 Create a reloc section in dynobj and make room for
1773 this reloc. */
1774 if (sreloc == NULL)
1775 {
1776 if (htab->elf.dynobj == NULL)
1777 htab->elf.dynobj = abfd;
1778
1779 sreloc = _bfd_elf_make_dynamic_reloc_section
1780 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1781
1782 if (sreloc == NULL)
1783 return FALSE;
1784 }
1785
1786 /* If this is a global symbol, we count the number of
1787 relocations we need for this symbol. */
1788 if (h != NULL)
1789 {
1790 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1791 }
1792 else
1793 {
1794 /* Track dynamic relocs needed for local syms too.
1795 We really need local syms available to do this
1796 easily. Oh well. */
1797 void **vpp;
1798 asection *s;
1799
1800 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1801 abfd, r_symndx);
1802 if (isym == NULL)
1803 return FALSE;
1804
1805 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1806 if (s == NULL)
1807 s = sec;
1808
1809 vpp = &elf_section_data (s)->local_dynrel;
1810 head = (struct elf_dyn_relocs **)vpp;
1811 }
1812
1813 p = *head;
1814 if (p == NULL || p->sec != sec)
1815 {
1816 bfd_size_type amt = sizeof *p;
1817 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1818 amt);
1819 if (p == NULL)
1820 return FALSE;
1821 p->next = *head;
1822 *head = p;
1823 p->sec = sec;
1824 p->count = 0;
1825 p->pc_count = 0;
1826 }
1827
1828 p->count += 1;
1829 /* Count size relocation as PC-relative relocation. */
1830 if (r_type == R_386_PC32 || size_reloc)
1831 p->pc_count += 1;
1832 }
1833 break;
1834
1835 /* This relocation describes the C++ object vtable hierarchy.
1836 Reconstruct it for later use during GC. */
1837 case R_386_GNU_VTINHERIT:
1838 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1839 return FALSE;
1840 break;
1841
1842 /* This relocation describes which C++ vtable entries are actually
1843 used. Record for later use during GC. */
1844 case R_386_GNU_VTENTRY:
1845 BFD_ASSERT (h != NULL);
1846 if (h != NULL
1847 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1848 return FALSE;
1849 break;
1850
1851 default:
1852 break;
1853 }
1854
1855 if (use_plt_got
1856 && h != NULL
1857 && h->plt.refcount > 0
1858 && h->got.refcount > 0
1859 && htab->plt_got == NULL)
1860 {
1861 /* Create the GOT procedure linkage table. */
1862 unsigned int plt_got_align;
1863 const struct elf_backend_data *bed;
1864
1865 bed = get_elf_backend_data (info->output_bfd);
1866 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1867 && (sizeof (elf_i386_got_plt_entry)
1868 == sizeof (elf_i386_pic_got_plt_entry)));
1869 plt_got_align = 3;
1870
1871 if (htab->elf.dynobj == NULL)
1872 htab->elf.dynobj = abfd;
1873 htab->plt_got
1874 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1875 ".plt.got",
1876 (bed->dynamic_sec_flags
1877 | SEC_ALLOC
1878 | SEC_CODE
1879 | SEC_LOAD
1880 | SEC_READONLY));
1881 if (htab->plt_got == NULL
1882 || !bfd_set_section_alignment (htab->elf.dynobj,
1883 htab->plt_got,
1884 plt_got_align))
1885 return FALSE;
1886 }
1887 }
1888
1889 return TRUE;
1890 }
1891
1892 /* Return the section that should be marked against GC for a given
1893 relocation. */
1894
1895 static asection *
1896 elf_i386_gc_mark_hook (asection *sec,
1897 struct bfd_link_info *info,
1898 Elf_Internal_Rela *rel,
1899 struct elf_link_hash_entry *h,
1900 Elf_Internal_Sym *sym)
1901 {
1902 if (h != NULL)
1903 switch (ELF32_R_TYPE (rel->r_info))
1904 {
1905 case R_386_GNU_VTINHERIT:
1906 case R_386_GNU_VTENTRY:
1907 return NULL;
1908 }
1909
1910 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1911 }
1912
1913 /* Update the got entry reference counts for the section being removed. */
1914
1915 static bfd_boolean
1916 elf_i386_gc_sweep_hook (bfd *abfd,
1917 struct bfd_link_info *info,
1918 asection *sec,
1919 const Elf_Internal_Rela *relocs)
1920 {
1921 struct elf_i386_link_hash_table *htab;
1922 Elf_Internal_Shdr *symtab_hdr;
1923 struct elf_link_hash_entry **sym_hashes;
1924 bfd_signed_vma *local_got_refcounts;
1925 const Elf_Internal_Rela *rel, *relend;
1926
1927 if (info->relocatable)
1928 return TRUE;
1929
1930 htab = elf_i386_hash_table (info);
1931 if (htab == NULL)
1932 return FALSE;
1933
1934 elf_section_data (sec)->local_dynrel = NULL;
1935
1936 symtab_hdr = &elf_symtab_hdr (abfd);
1937 sym_hashes = elf_sym_hashes (abfd);
1938 local_got_refcounts = elf_local_got_refcounts (abfd);
1939
1940 relend = relocs + sec->reloc_count;
1941 for (rel = relocs; rel < relend; rel++)
1942 {
1943 unsigned long r_symndx;
1944 unsigned int r_type;
1945 struct elf_link_hash_entry *h = NULL;
1946
1947 r_symndx = ELF32_R_SYM (rel->r_info);
1948 if (r_symndx >= symtab_hdr->sh_info)
1949 {
1950 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1951 while (h->root.type == bfd_link_hash_indirect
1952 || h->root.type == bfd_link_hash_warning)
1953 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1954 }
1955 else
1956 {
1957 /* A local symbol. */
1958 Elf_Internal_Sym *isym;
1959
1960 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1961 abfd, r_symndx);
1962
1963 /* Check relocation against local STT_GNU_IFUNC symbol. */
1964 if (isym != NULL
1965 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1966 {
1967 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1968 if (h == NULL)
1969 abort ();
1970 }
1971 }
1972
1973 if (h)
1974 {
1975 struct elf_i386_link_hash_entry *eh;
1976 struct elf_dyn_relocs **pp;
1977 struct elf_dyn_relocs *p;
1978
1979 eh = (struct elf_i386_link_hash_entry *) h;
1980 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1981 if (p->sec == sec)
1982 {
1983 /* Everything must go for SEC. */
1984 *pp = p->next;
1985 break;
1986 }
1987 }
1988
1989 r_type = ELF32_R_TYPE (rel->r_info);
1990 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1991 symtab_hdr, sym_hashes,
1992 &r_type, GOT_UNKNOWN,
1993 rel, relend, h, r_symndx))
1994 return FALSE;
1995
1996 switch (r_type)
1997 {
1998 case R_386_TLS_LDM:
1999 if (htab->tls_ldm_got.refcount > 0)
2000 htab->tls_ldm_got.refcount -= 1;
2001 break;
2002
2003 case R_386_TLS_GD:
2004 case R_386_TLS_GOTDESC:
2005 case R_386_TLS_DESC_CALL:
2006 case R_386_TLS_IE_32:
2007 case R_386_TLS_IE:
2008 case R_386_TLS_GOTIE:
2009 case R_386_GOT32:
2010 if (h != NULL)
2011 {
2012 if (h->got.refcount > 0)
2013 h->got.refcount -= 1;
2014 if (h->type == STT_GNU_IFUNC)
2015 {
2016 if (h->plt.refcount > 0)
2017 h->plt.refcount -= 1;
2018 }
2019 }
2020 else if (local_got_refcounts != NULL)
2021 {
2022 if (local_got_refcounts[r_symndx] > 0)
2023 local_got_refcounts[r_symndx] -= 1;
2024 }
2025 break;
2026
2027 case R_386_32:
2028 case R_386_PC32:
2029 case R_386_SIZE32:
2030 if (info->shared
2031 && (h == NULL || h->type != STT_GNU_IFUNC))
2032 break;
2033 /* Fall through */
2034
2035 case R_386_PLT32:
2036 if (h != NULL)
2037 {
2038 if (h->plt.refcount > 0)
2039 h->plt.refcount -= 1;
2040 }
2041 break;
2042
2043 case R_386_GOTOFF:
2044 if (h != NULL && h->type == STT_GNU_IFUNC)
2045 {
2046 if (h->got.refcount > 0)
2047 h->got.refcount -= 1;
2048 if (h->plt.refcount > 0)
2049 h->plt.refcount -= 1;
2050 }
2051 break;
2052
2053 default:
2054 break;
2055 }
2056 }
2057
2058 return TRUE;
2059 }
2060
2061 /* Adjust a symbol defined by a dynamic object and referenced by a
2062 regular object. The current definition is in some section of the
2063 dynamic object, but we're not including those sections. We have to
2064 change the definition to something the rest of the link can
2065 understand. */
2066
2067 static bfd_boolean
2068 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2069 struct elf_link_hash_entry *h)
2070 {
2071 struct elf_i386_link_hash_table *htab;
2072 asection *s;
2073 struct elf_i386_link_hash_entry *eh;
2074 struct elf_dyn_relocs *p;
2075
2076 /* STT_GNU_IFUNC symbol must go through PLT. */
2077 if (h->type == STT_GNU_IFUNC)
2078 {
2079 /* All local STT_GNU_IFUNC references must be treate as local
2080 calls via local PLT. */
2081 if (h->ref_regular
2082 && SYMBOL_CALLS_LOCAL (info, h))
2083 {
2084 bfd_size_type pc_count = 0, count = 0;
2085 struct elf_dyn_relocs **pp;
2086
2087 eh = (struct elf_i386_link_hash_entry *) h;
2088 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2089 {
2090 pc_count += p->pc_count;
2091 p->count -= p->pc_count;
2092 p->pc_count = 0;
2093 count += p->count;
2094 if (p->count == 0)
2095 *pp = p->next;
2096 else
2097 pp = &p->next;
2098 }
2099
2100 if (pc_count || count)
2101 {
2102 h->needs_plt = 1;
2103 h->non_got_ref = 1;
2104 if (h->plt.refcount <= 0)
2105 h->plt.refcount = 1;
2106 else
2107 h->plt.refcount += 1;
2108 }
2109 }
2110
2111 if (h->plt.refcount <= 0)
2112 {
2113 h->plt.offset = (bfd_vma) -1;
2114 h->needs_plt = 0;
2115 }
2116 return TRUE;
2117 }
2118
2119 /* If this is a function, put it in the procedure linkage table. We
2120 will fill in the contents of the procedure linkage table later,
2121 when we know the address of the .got section. */
2122 if (h->type == STT_FUNC
2123 || h->needs_plt)
2124 {
2125 if (h->plt.refcount <= 0
2126 || SYMBOL_CALLS_LOCAL (info, h)
2127 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2128 && h->root.type == bfd_link_hash_undefweak))
2129 {
2130 /* This case can occur if we saw a PLT32 reloc in an input
2131 file, but the symbol was never referred to by a dynamic
2132 object, or if all references were garbage collected. In
2133 such a case, we don't actually need to build a procedure
2134 linkage table, and we can just do a PC32 reloc instead. */
2135 h->plt.offset = (bfd_vma) -1;
2136 h->needs_plt = 0;
2137 }
2138
2139 return TRUE;
2140 }
2141 else
2142 /* It's possible that we incorrectly decided a .plt reloc was
2143 needed for an R_386_PC32 reloc to a non-function sym in
2144 check_relocs. We can't decide accurately between function and
2145 non-function syms in check-relocs; Objects loaded later in
2146 the link may change h->type. So fix it now. */
2147 h->plt.offset = (bfd_vma) -1;
2148
2149 /* If this is a weak symbol, and there is a real definition, the
2150 processor independent code will have arranged for us to see the
2151 real definition first, and we can just use the same value. */
2152 if (h->u.weakdef != NULL)
2153 {
2154 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2155 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2156 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2157 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2158 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2159 h->non_got_ref = h->u.weakdef->non_got_ref;
2160 return TRUE;
2161 }
2162
2163 /* This is a reference to a symbol defined by a dynamic object which
2164 is not a function. */
2165
2166 /* If we are creating a shared library, we must presume that the
2167 only references to the symbol are via the global offset table.
2168 For such cases we need not do anything here; the relocations will
2169 be handled correctly by relocate_section. */
2170 if (info->shared)
2171 return TRUE;
2172
2173 /* If there are no references to this symbol that do not use the
2174 GOT, we don't need to generate a copy reloc. */
2175 if (!h->non_got_ref)
2176 return TRUE;
2177
2178 /* If -z nocopyreloc was given, we won't generate them either. */
2179 if (info->nocopyreloc)
2180 {
2181 h->non_got_ref = 0;
2182 return TRUE;
2183 }
2184
2185 htab = elf_i386_hash_table (info);
2186 if (htab == NULL)
2187 return FALSE;
2188
2189 /* If there aren't any dynamic relocs in read-only sections, then
2190 we can keep the dynamic relocs and avoid the copy reloc. This
2191 doesn't work on VxWorks, where we can not have dynamic relocations
2192 (other than copy and jump slot relocations) in an executable. */
2193 if (ELIMINATE_COPY_RELOCS
2194 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2195 {
2196 eh = (struct elf_i386_link_hash_entry *) h;
2197 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2198 {
2199 s = p->sec->output_section;
2200 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2201 break;
2202 }
2203
2204 if (p == NULL)
2205 {
2206 h->non_got_ref = 0;
2207 return TRUE;
2208 }
2209 }
2210
2211 /* We must allocate the symbol in our .dynbss section, which will
2212 become part of the .bss section of the executable. There will be
2213 an entry for this symbol in the .dynsym section. The dynamic
2214 object will contain position independent code, so all references
2215 from the dynamic object to this symbol will go through the global
2216 offset table. The dynamic linker will use the .dynsym entry to
2217 determine the address it must put in the global offset table, so
2218 both the dynamic object and the regular object will refer to the
2219 same memory location for the variable. */
2220
2221 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2222 copy the initial value out of the dynamic object and into the
2223 runtime process image. */
2224 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2225 {
2226 htab->srelbss->size += sizeof (Elf32_External_Rel);
2227 h->needs_copy = 1;
2228 }
2229
2230 s = htab->sdynbss;
2231
2232 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2233 }
2234
2235 /* Allocate space in .plt, .got and associated reloc sections for
2236 dynamic relocs. */
2237
2238 static bfd_boolean
2239 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2240 {
2241 struct bfd_link_info *info;
2242 struct elf_i386_link_hash_table *htab;
2243 struct elf_i386_link_hash_entry *eh;
2244 struct elf_dyn_relocs *p;
2245 unsigned plt_entry_size;
2246
2247 if (h->root.type == bfd_link_hash_indirect)
2248 return TRUE;
2249
2250 eh = (struct elf_i386_link_hash_entry *) h;
2251
2252 info = (struct bfd_link_info *) inf;
2253 htab = elf_i386_hash_table (info);
2254 if (htab == NULL)
2255 return FALSE;
2256
2257 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2258
2259 /* We can't use the GOT PLT if pointer equality is needed since
2260 finish_dynamic_symbol won't clear symbol value and the dynamic
2261 linker won't update the GOT slot. We will get into an infinite
2262 loop at run-time. */
2263 if (htab->plt_got != NULL
2264 && h->type != STT_GNU_IFUNC
2265 && !h->pointer_equality_needed
2266 && h->plt.refcount > 0
2267 && h->got.refcount > 0)
2268 {
2269 /* Don't use the regular PLT if there are both GOT and GOTPLT
2270 reloctions. */
2271 h->plt.offset = (bfd_vma) -1;
2272
2273 /* Use the GOT PLT. */
2274 eh->plt_got.refcount = 1;
2275 }
2276
2277 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2278 here if it is defined and referenced in a non-shared object. */
2279 if (h->type == STT_GNU_IFUNC
2280 && h->def_regular)
2281 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2282 plt_entry_size,
2283 plt_entry_size, 4);
2284 else if (htab->elf.dynamic_sections_created
2285 && (h->plt.refcount > 0 || eh->plt_got.refcount > 0))
2286 {
2287 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2288
2289 /* Make sure this symbol is output as a dynamic symbol.
2290 Undefined weak syms won't yet be marked as dynamic. */
2291 if (h->dynindx == -1
2292 && !h->forced_local)
2293 {
2294 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2295 return FALSE;
2296 }
2297
2298 if (info->shared
2299 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2300 {
2301 asection *s = htab->elf.splt;
2302 asection *got_s = htab->plt_got;
2303
2304 /* If this is the first .plt entry, make room for the special
2305 first entry. */
2306 if (s->size == 0)
2307 s->size = plt_entry_size;
2308
2309 if (use_plt_got)
2310 eh->plt_got.offset = got_s->size;
2311 else
2312 h->plt.offset = s->size;
2313
2314 /* If this symbol is not defined in a regular file, and we are
2315 not generating a shared library, then set the symbol to this
2316 location in the .plt. This is required to make function
2317 pointers compare as equal between the normal executable and
2318 the shared library. */
2319 if (! info->shared
2320 && !h->def_regular)
2321 {
2322 if (use_plt_got)
2323 {
2324 /* We need to make a call to the entry of the GOT PLT
2325 instead of regular PLT entry. */
2326 h->root.u.def.section = got_s;
2327 h->root.u.def.value = eh->plt_got.offset;
2328 }
2329 else
2330 {
2331 h->root.u.def.section = s;
2332 h->root.u.def.value = h->plt.offset;
2333 }
2334 }
2335
2336 /* Make room for this entry. */
2337 if (use_plt_got)
2338 got_s->size += sizeof (elf_i386_got_plt_entry);
2339 else
2340 {
2341 s->size += plt_entry_size;
2342
2343 /* We also need to make an entry in the .got.plt section,
2344 which will be placed in the .got section by the linker
2345 script. */
2346 htab->elf.sgotplt->size += 4;
2347
2348 /* We also need to make an entry in the .rel.plt section. */
2349 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2350 htab->elf.srelplt->reloc_count++;
2351 }
2352
2353 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2354 && !info->shared)
2355 {
2356 /* VxWorks has a second set of relocations for each PLT entry
2357 in executables. They go in a separate relocation section,
2358 which is processed by the kernel loader. */
2359
2360 /* There are two relocations for the initial PLT entry: an
2361 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2362 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2363
2364 if (h->plt.offset == plt_entry_size)
2365 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2366
2367 /* There are two extra relocations for each subsequent PLT entry:
2368 an R_386_32 relocation for the GOT entry, and an R_386_32
2369 relocation for the PLT entry. */
2370
2371 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2372 }
2373 }
2374 else
2375 {
2376 h->plt.offset = (bfd_vma) -1;
2377 h->needs_plt = 0;
2378 }
2379 }
2380 else
2381 {
2382 h->plt.offset = (bfd_vma) -1;
2383 h->needs_plt = 0;
2384 }
2385
2386 eh->tlsdesc_got = (bfd_vma) -1;
2387
2388 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2389 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2390 if (h->got.refcount > 0
2391 && info->executable
2392 && h->dynindx == -1
2393 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2394 h->got.offset = (bfd_vma) -1;
2395 else if (h->got.refcount > 0)
2396 {
2397 asection *s;
2398 bfd_boolean dyn;
2399 int tls_type = elf_i386_hash_entry(h)->tls_type;
2400
2401 /* Make sure this symbol is output as a dynamic symbol.
2402 Undefined weak syms won't yet be marked as dynamic. */
2403 if (h->dynindx == -1
2404 && !h->forced_local)
2405 {
2406 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2407 return FALSE;
2408 }
2409
2410 s = htab->elf.sgot;
2411 if (GOT_TLS_GDESC_P (tls_type))
2412 {
2413 eh->tlsdesc_got = htab->elf.sgotplt->size
2414 - elf_i386_compute_jump_table_size (htab);
2415 htab->elf.sgotplt->size += 8;
2416 h->got.offset = (bfd_vma) -2;
2417 }
2418 if (! GOT_TLS_GDESC_P (tls_type)
2419 || GOT_TLS_GD_P (tls_type))
2420 {
2421 h->got.offset = s->size;
2422 s->size += 4;
2423 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2424 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2425 s->size += 4;
2426 }
2427 dyn = htab->elf.dynamic_sections_created;
2428 /* R_386_TLS_IE_32 needs one dynamic relocation,
2429 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2430 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2431 need two), R_386_TLS_GD needs one if local symbol and two if
2432 global. */
2433 if (tls_type == GOT_TLS_IE_BOTH)
2434 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2435 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2436 || (tls_type & GOT_TLS_IE))
2437 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2438 else if (GOT_TLS_GD_P (tls_type))
2439 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2440 else if (! GOT_TLS_GDESC_P (tls_type)
2441 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2442 || h->root.type != bfd_link_hash_undefweak)
2443 && (info->shared
2444 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2445 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2446 if (GOT_TLS_GDESC_P (tls_type))
2447 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2448 }
2449 else
2450 h->got.offset = (bfd_vma) -1;
2451
2452 if (eh->dyn_relocs == NULL)
2453 return TRUE;
2454
2455 /* In the shared -Bsymbolic case, discard space allocated for
2456 dynamic pc-relative relocs against symbols which turn out to be
2457 defined in regular objects. For the normal shared case, discard
2458 space for pc-relative relocs that have become local due to symbol
2459 visibility changes. */
2460
2461 if (info->shared)
2462 {
2463 /* The only reloc that uses pc_count is R_386_PC32, which will
2464 appear on a call or on something like ".long foo - .". We
2465 want calls to protected symbols to resolve directly to the
2466 function rather than going via the plt. If people want
2467 function pointer comparisons to work as expected then they
2468 should avoid writing assembly like ".long foo - .". */
2469 if (SYMBOL_CALLS_LOCAL (info, h))
2470 {
2471 struct elf_dyn_relocs **pp;
2472
2473 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2474 {
2475 p->count -= p->pc_count;
2476 p->pc_count = 0;
2477 if (p->count == 0)
2478 *pp = p->next;
2479 else
2480 pp = &p->next;
2481 }
2482 }
2483
2484 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2485 {
2486 struct elf_dyn_relocs **pp;
2487 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2488 {
2489 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2490 *pp = p->next;
2491 else
2492 pp = &p->next;
2493 }
2494 }
2495
2496 /* Also discard relocs on undefined weak syms with non-default
2497 visibility. */
2498 if (eh->dyn_relocs != NULL
2499 && h->root.type == bfd_link_hash_undefweak)
2500 {
2501 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2502 eh->dyn_relocs = NULL;
2503
2504 /* Make sure undefined weak symbols are output as a dynamic
2505 symbol in PIEs. */
2506 else if (h->dynindx == -1
2507 && !h->forced_local)
2508 {
2509 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2510 return FALSE;
2511 }
2512 }
2513 }
2514 else if (ELIMINATE_COPY_RELOCS)
2515 {
2516 /* For the non-shared case, discard space for relocs against
2517 symbols which turn out to need copy relocs or are not
2518 dynamic. */
2519
2520 if (!h->non_got_ref
2521 && ((h->def_dynamic
2522 && !h->def_regular)
2523 || (htab->elf.dynamic_sections_created
2524 && (h->root.type == bfd_link_hash_undefweak
2525 || h->root.type == bfd_link_hash_undefined))))
2526 {
2527 /* Make sure this symbol is output as a dynamic symbol.
2528 Undefined weak syms won't yet be marked as dynamic. */
2529 if (h->dynindx == -1
2530 && !h->forced_local)
2531 {
2532 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2533 return FALSE;
2534 }
2535
2536 /* If that succeeded, we know we'll be keeping all the
2537 relocs. */
2538 if (h->dynindx != -1)
2539 goto keep;
2540 }
2541
2542 eh->dyn_relocs = NULL;
2543
2544 keep: ;
2545 }
2546
2547 /* Finally, allocate space. */
2548 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2549 {
2550 asection *sreloc;
2551
2552 sreloc = elf_section_data (p->sec)->sreloc;
2553
2554 BFD_ASSERT (sreloc != NULL);
2555 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2556 }
2557
2558 return TRUE;
2559 }
2560
2561 /* Allocate space in .plt, .got and associated reloc sections for
2562 local dynamic relocs. */
2563
2564 static bfd_boolean
2565 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2566 {
2567 struct elf_link_hash_entry *h
2568 = (struct elf_link_hash_entry *) *slot;
2569
2570 if (h->type != STT_GNU_IFUNC
2571 || !h->def_regular
2572 || !h->ref_regular
2573 || !h->forced_local
2574 || h->root.type != bfd_link_hash_defined)
2575 abort ();
2576
2577 return elf_i386_allocate_dynrelocs (h, inf);
2578 }
2579
2580 /* Find any dynamic relocs that apply to read-only sections. */
2581
2582 static bfd_boolean
2583 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2584 {
2585 struct elf_i386_link_hash_entry *eh;
2586 struct elf_dyn_relocs *p;
2587
2588 /* Skip local IFUNC symbols. */
2589 if (h->forced_local && h->type == STT_GNU_IFUNC)
2590 return TRUE;
2591
2592 eh = (struct elf_i386_link_hash_entry *) h;
2593 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2594 {
2595 asection *s = p->sec->output_section;
2596
2597 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2598 {
2599 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2600
2601 info->flags |= DF_TEXTREL;
2602
2603 if ((info->warn_shared_textrel && info->shared)
2604 || info->error_textrel)
2605 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2606 p->sec->owner, h->root.root.string,
2607 p->sec);
2608
2609 /* Not an error, just cut short the traversal. */
2610 return FALSE;
2611 }
2612 }
2613 return TRUE;
2614 }
2615
2616 /* Convert
2617 mov foo@GOT(%reg), %reg
2618 to
2619 lea foo@GOTOFF(%reg), %reg
2620 with the local symbol, foo. */
2621
2622 static bfd_boolean
2623 elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2624 struct bfd_link_info *link_info)
2625 {
2626 Elf_Internal_Shdr *symtab_hdr;
2627 Elf_Internal_Rela *internal_relocs;
2628 Elf_Internal_Rela *irel, *irelend;
2629 bfd_byte *contents;
2630 struct elf_i386_link_hash_table *htab;
2631 bfd_boolean changed_contents;
2632 bfd_boolean changed_relocs;
2633 bfd_signed_vma *local_got_refcounts;
2634
2635 /* Don't even try to convert non-ELF outputs. */
2636 if (!is_elf_hash_table (link_info->hash))
2637 return FALSE;
2638
2639 /* Nothing to do if there are no codes, no relocations or no output. */
2640 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2641 || sec->reloc_count == 0
2642 || bfd_is_abs_section (sec->output_section))
2643 return TRUE;
2644
2645 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2646
2647 /* Load the relocations for this section. */
2648 internal_relocs = (_bfd_elf_link_read_relocs
2649 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2650 link_info->keep_memory));
2651 if (internal_relocs == NULL)
2652 return FALSE;
2653
2654 htab = elf_i386_hash_table (link_info);
2655 changed_contents = FALSE;
2656 changed_relocs = FALSE;
2657 local_got_refcounts = elf_local_got_refcounts (abfd);
2658
2659 /* Get the section contents. */
2660 if (elf_section_data (sec)->this_hdr.contents != NULL)
2661 contents = elf_section_data (sec)->this_hdr.contents;
2662 else
2663 {
2664 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2665 goto error_return;
2666 }
2667
2668 irelend = internal_relocs + sec->reloc_count;
2669 for (irel = internal_relocs; irel < irelend; irel++)
2670 {
2671 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2672 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2673 unsigned int indx;
2674 struct elf_link_hash_entry *h;
2675
2676 if (r_type != R_386_GOT32)
2677 continue;
2678
2679 /* Get the symbol referred to by the reloc. */
2680 if (r_symndx < symtab_hdr->sh_info)
2681 {
2682 Elf_Internal_Sym *isym;
2683
2684 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2685 abfd, r_symndx);
2686
2687 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2688 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2689 && irel->r_offset >= 2
2690 && bfd_get_8 (input_bfd,
2691 contents + irel->r_offset - 2) == 0x8b)
2692 {
2693 bfd_put_8 (output_bfd, 0x8d,
2694 contents + irel->r_offset - 2);
2695 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2696 if (local_got_refcounts != NULL
2697 && local_got_refcounts[r_symndx] > 0)
2698 local_got_refcounts[r_symndx] -= 1;
2699 changed_contents = TRUE;
2700 changed_relocs = TRUE;
2701 }
2702 continue;
2703 }
2704
2705 indx = r_symndx - symtab_hdr->sh_info;
2706 h = elf_sym_hashes (abfd)[indx];
2707 BFD_ASSERT (h != NULL);
2708
2709 while (h->root.type == bfd_link_hash_indirect
2710 || h->root.type == bfd_link_hash_warning)
2711 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2712
2713 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2714 optimizing _DYNAMIC since ld.so may use its link-time address. */
2715 if (h->def_regular
2716 && h->type != STT_GNU_IFUNC
2717 && h != htab->elf.hdynamic
2718 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2719 && irel->r_offset >= 2
2720 && bfd_get_8 (input_bfd,
2721 contents + irel->r_offset - 2) == 0x8b)
2722 {
2723 bfd_put_8 (output_bfd, 0x8d,
2724 contents + irel->r_offset - 2);
2725 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2726 if (h->got.refcount > 0)
2727 h->got.refcount -= 1;
2728 changed_contents = TRUE;
2729 changed_relocs = TRUE;
2730 }
2731 }
2732
2733 if (contents != NULL
2734 && elf_section_data (sec)->this_hdr.contents != contents)
2735 {
2736 if (!changed_contents && !link_info->keep_memory)
2737 free (contents);
2738 else
2739 {
2740 /* Cache the section contents for elf_link_input_bfd. */
2741 elf_section_data (sec)->this_hdr.contents = contents;
2742 }
2743 }
2744
2745 if (elf_section_data (sec)->relocs != internal_relocs)
2746 {
2747 if (!changed_relocs)
2748 free (internal_relocs);
2749 else
2750 elf_section_data (sec)->relocs = internal_relocs;
2751 }
2752
2753 return TRUE;
2754
2755 error_return:
2756 if (contents != NULL
2757 && elf_section_data (sec)->this_hdr.contents != contents)
2758 free (contents);
2759 if (internal_relocs != NULL
2760 && elf_section_data (sec)->relocs != internal_relocs)
2761 free (internal_relocs);
2762 return FALSE;
2763 }
2764
2765 /* Set the sizes of the dynamic sections. */
2766
2767 static bfd_boolean
2768 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2769 {
2770 struct elf_i386_link_hash_table *htab;
2771 bfd *dynobj;
2772 asection *s;
2773 bfd_boolean relocs;
2774 bfd *ibfd;
2775
2776 htab = elf_i386_hash_table (info);
2777 if (htab == NULL)
2778 return FALSE;
2779 dynobj = htab->elf.dynobj;
2780 if (dynobj == NULL)
2781 abort ();
2782
2783 if (htab->elf.dynamic_sections_created)
2784 {
2785 /* Set the contents of the .interp section to the interpreter. */
2786 if (info->executable)
2787 {
2788 s = bfd_get_linker_section (dynobj, ".interp");
2789 if (s == NULL)
2790 abort ();
2791 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2792 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2793 }
2794 }
2795
2796 /* Set up .got offsets for local syms, and space for local dynamic
2797 relocs. */
2798 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2799 {
2800 bfd_signed_vma *local_got;
2801 bfd_signed_vma *end_local_got;
2802 char *local_tls_type;
2803 bfd_vma *local_tlsdesc_gotent;
2804 bfd_size_type locsymcount;
2805 Elf_Internal_Shdr *symtab_hdr;
2806 asection *srel;
2807
2808 if (! is_i386_elf (ibfd))
2809 continue;
2810
2811 for (s = ibfd->sections; s != NULL; s = s->next)
2812 {
2813 struct elf_dyn_relocs *p;
2814
2815 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2816 return FALSE;
2817
2818 for (p = ((struct elf_dyn_relocs *)
2819 elf_section_data (s)->local_dynrel);
2820 p != NULL;
2821 p = p->next)
2822 {
2823 if (!bfd_is_abs_section (p->sec)
2824 && bfd_is_abs_section (p->sec->output_section))
2825 {
2826 /* Input section has been discarded, either because
2827 it is a copy of a linkonce section or due to
2828 linker script /DISCARD/, so we'll be discarding
2829 the relocs too. */
2830 }
2831 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2832 && strcmp (p->sec->output_section->name,
2833 ".tls_vars") == 0)
2834 {
2835 /* Relocations in vxworks .tls_vars sections are
2836 handled specially by the loader. */
2837 }
2838 else if (p->count != 0)
2839 {
2840 srel = elf_section_data (p->sec)->sreloc;
2841 srel->size += p->count * sizeof (Elf32_External_Rel);
2842 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2843 && (info->flags & DF_TEXTREL) == 0)
2844 {
2845 info->flags |= DF_TEXTREL;
2846 if ((info->warn_shared_textrel && info->shared)
2847 || info->error_textrel)
2848 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2849 p->sec->owner, p->sec);
2850 }
2851 }
2852 }
2853 }
2854
2855 local_got = elf_local_got_refcounts (ibfd);
2856 if (!local_got)
2857 continue;
2858
2859 symtab_hdr = &elf_symtab_hdr (ibfd);
2860 locsymcount = symtab_hdr->sh_info;
2861 end_local_got = local_got + locsymcount;
2862 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2863 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2864 s = htab->elf.sgot;
2865 srel = htab->elf.srelgot;
2866 for (; local_got < end_local_got;
2867 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2868 {
2869 *local_tlsdesc_gotent = (bfd_vma) -1;
2870 if (*local_got > 0)
2871 {
2872 if (GOT_TLS_GDESC_P (*local_tls_type))
2873 {
2874 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2875 - elf_i386_compute_jump_table_size (htab);
2876 htab->elf.sgotplt->size += 8;
2877 *local_got = (bfd_vma) -2;
2878 }
2879 if (! GOT_TLS_GDESC_P (*local_tls_type)
2880 || GOT_TLS_GD_P (*local_tls_type))
2881 {
2882 *local_got = s->size;
2883 s->size += 4;
2884 if (GOT_TLS_GD_P (*local_tls_type)
2885 || *local_tls_type == GOT_TLS_IE_BOTH)
2886 s->size += 4;
2887 }
2888 if (info->shared
2889 || GOT_TLS_GD_ANY_P (*local_tls_type)
2890 || (*local_tls_type & GOT_TLS_IE))
2891 {
2892 if (*local_tls_type == GOT_TLS_IE_BOTH)
2893 srel->size += 2 * sizeof (Elf32_External_Rel);
2894 else if (GOT_TLS_GD_P (*local_tls_type)
2895 || ! GOT_TLS_GDESC_P (*local_tls_type))
2896 srel->size += sizeof (Elf32_External_Rel);
2897 if (GOT_TLS_GDESC_P (*local_tls_type))
2898 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2899 }
2900 }
2901 else
2902 *local_got = (bfd_vma) -1;
2903 }
2904 }
2905
2906 if (htab->tls_ldm_got.refcount > 0)
2907 {
2908 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2909 relocs. */
2910 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2911 htab->elf.sgot->size += 8;
2912 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2913 }
2914 else
2915 htab->tls_ldm_got.offset = -1;
2916
2917 /* Allocate global sym .plt and .got entries, and space for global
2918 sym dynamic relocs. */
2919 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2920
2921 /* Allocate .plt and .got entries, and space for local symbols. */
2922 htab_traverse (htab->loc_hash_table,
2923 elf_i386_allocate_local_dynrelocs,
2924 info);
2925
2926 /* For every jump slot reserved in the sgotplt, reloc_count is
2927 incremented. However, when we reserve space for TLS descriptors,
2928 it's not incremented, so in order to compute the space reserved
2929 for them, it suffices to multiply the reloc count by the jump
2930 slot size.
2931
2932 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2933 so that R_386_IRELATIVE entries come last. */
2934 if (htab->elf.srelplt)
2935 {
2936 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2937 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2938 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2939 }
2940 else if (htab->elf.irelplt)
2941 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2942
2943
2944 if (htab->elf.sgotplt)
2945 {
2946 /* Don't allocate .got.plt section if there are no GOT nor PLT
2947 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2948 if ((htab->elf.hgot == NULL
2949 || !htab->elf.hgot->ref_regular_nonweak)
2950 && (htab->elf.sgotplt->size
2951 == get_elf_backend_data (output_bfd)->got_header_size)
2952 && (htab->elf.splt == NULL
2953 || htab->elf.splt->size == 0)
2954 && (htab->elf.sgot == NULL
2955 || htab->elf.sgot->size == 0)
2956 && (htab->elf.iplt == NULL
2957 || htab->elf.iplt->size == 0)
2958 && (htab->elf.igotplt == NULL
2959 || htab->elf.igotplt->size == 0))
2960 htab->elf.sgotplt->size = 0;
2961 }
2962
2963
2964 if (htab->plt_eh_frame != NULL
2965 && htab->elf.splt != NULL
2966 && htab->elf.splt->size != 0
2967 && !bfd_is_abs_section (htab->elf.splt->output_section)
2968 && _bfd_elf_eh_frame_present (info))
2969 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
2970
2971 /* We now have determined the sizes of the various dynamic sections.
2972 Allocate memory for them. */
2973 relocs = FALSE;
2974 for (s = dynobj->sections; s != NULL; s = s->next)
2975 {
2976 bfd_boolean strip_section = TRUE;
2977
2978 if ((s->flags & SEC_LINKER_CREATED) == 0)
2979 continue;
2980
2981 if (s == htab->elf.splt
2982 || s == htab->elf.sgot)
2983 {
2984 /* Strip this section if we don't need it; see the
2985 comment below. */
2986 /* We'd like to strip these sections if they aren't needed, but if
2987 we've exported dynamic symbols from them we must leave them.
2988 It's too late to tell BFD to get rid of the symbols. */
2989
2990 if (htab->elf.hplt != NULL)
2991 strip_section = FALSE;
2992 }
2993 else if (s == htab->elf.sgotplt
2994 || s == htab->elf.iplt
2995 || s == htab->elf.igotplt
2996 || s == htab->plt_got
2997 || s == htab->plt_eh_frame
2998 || s == htab->sdynbss)
2999 {
3000 /* Strip these too. */
3001 }
3002 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3003 {
3004 if (s->size != 0
3005 && s != htab->elf.srelplt
3006 && s != htab->srelplt2)
3007 relocs = TRUE;
3008
3009 /* We use the reloc_count field as a counter if we need
3010 to copy relocs into the output file. */
3011 s->reloc_count = 0;
3012 }
3013 else
3014 {
3015 /* It's not one of our sections, so don't allocate space. */
3016 continue;
3017 }
3018
3019 if (s->size == 0)
3020 {
3021 /* If we don't need this section, strip it from the
3022 output file. This is mostly to handle .rel.bss and
3023 .rel.plt. We must create both sections in
3024 create_dynamic_sections, because they must be created
3025 before the linker maps input sections to output
3026 sections. The linker does that before
3027 adjust_dynamic_symbol is called, and it is that
3028 function which decides whether anything needs to go
3029 into these sections. */
3030 if (strip_section)
3031 s->flags |= SEC_EXCLUDE;
3032 continue;
3033 }
3034
3035 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3036 continue;
3037
3038 /* Allocate memory for the section contents. We use bfd_zalloc
3039 here in case unused entries are not reclaimed before the
3040 section's contents are written out. This should not happen,
3041 but this way if it does, we get a R_386_NONE reloc instead
3042 of garbage. */
3043 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3044 if (s->contents == NULL)
3045 return FALSE;
3046 }
3047
3048 if (htab->plt_eh_frame != NULL
3049 && htab->plt_eh_frame->contents != NULL)
3050 {
3051 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3052 sizeof (elf_i386_eh_frame_plt));
3053 bfd_put_32 (dynobj, htab->elf.splt->size,
3054 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3055 }
3056
3057 if (htab->elf.dynamic_sections_created)
3058 {
3059 /* Add some entries to the .dynamic section. We fill in the
3060 values later, in elf_i386_finish_dynamic_sections, but we
3061 must add the entries now so that we get the correct size for
3062 the .dynamic section. The DT_DEBUG entry is filled in by the
3063 dynamic linker and used by the debugger. */
3064 #define add_dynamic_entry(TAG, VAL) \
3065 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3066
3067 if (info->executable)
3068 {
3069 if (!add_dynamic_entry (DT_DEBUG, 0))
3070 return FALSE;
3071 }
3072
3073 if (htab->elf.splt->size != 0)
3074 {
3075 if (!add_dynamic_entry (DT_PLTGOT, 0)
3076 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3077 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3078 || !add_dynamic_entry (DT_JMPREL, 0))
3079 return FALSE;
3080 }
3081
3082 if (relocs)
3083 {
3084 if (!add_dynamic_entry (DT_REL, 0)
3085 || !add_dynamic_entry (DT_RELSZ, 0)
3086 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3087 return FALSE;
3088
3089 /* If any dynamic relocs apply to a read-only section,
3090 then we need a DT_TEXTREL entry. */
3091 if ((info->flags & DF_TEXTREL) == 0)
3092 elf_link_hash_traverse (&htab->elf,
3093 elf_i386_readonly_dynrelocs, info);
3094
3095 if ((info->flags & DF_TEXTREL) != 0)
3096 {
3097 if (!add_dynamic_entry (DT_TEXTREL, 0))
3098 return FALSE;
3099 }
3100 }
3101 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3102 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3103 return FALSE;
3104 }
3105 #undef add_dynamic_entry
3106
3107 return TRUE;
3108 }
3109
3110 static bfd_boolean
3111 elf_i386_always_size_sections (bfd *output_bfd,
3112 struct bfd_link_info *info)
3113 {
3114 asection *tls_sec = elf_hash_table (info)->tls_sec;
3115
3116 if (tls_sec)
3117 {
3118 struct elf_link_hash_entry *tlsbase;
3119
3120 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3121 "_TLS_MODULE_BASE_",
3122 FALSE, FALSE, FALSE);
3123
3124 if (tlsbase && tlsbase->type == STT_TLS)
3125 {
3126 struct elf_i386_link_hash_table *htab;
3127 struct bfd_link_hash_entry *bh = NULL;
3128 const struct elf_backend_data *bed
3129 = get_elf_backend_data (output_bfd);
3130
3131 htab = elf_i386_hash_table (info);
3132 if (htab == NULL)
3133 return FALSE;
3134
3135 if (!(_bfd_generic_link_add_one_symbol
3136 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3137 tls_sec, 0, NULL, FALSE,
3138 bed->collect, &bh)))
3139 return FALSE;
3140
3141 htab->tls_module_base = bh;
3142
3143 tlsbase = (struct elf_link_hash_entry *)bh;
3144 tlsbase->def_regular = 1;
3145 tlsbase->other = STV_HIDDEN;
3146 tlsbase->root.linker_def = 1;
3147 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3148 }
3149 }
3150
3151 return TRUE;
3152 }
3153
3154 /* Set the correct type for an x86 ELF section. We do this by the
3155 section name, which is a hack, but ought to work. */
3156
3157 static bfd_boolean
3158 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3159 Elf_Internal_Shdr *hdr,
3160 asection *sec)
3161 {
3162 const char *name;
3163
3164 name = bfd_get_section_name (abfd, sec);
3165
3166 /* This is an ugly, but unfortunately necessary hack that is
3167 needed when producing EFI binaries on x86. It tells
3168 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3169 containing ELF relocation info. We need this hack in order to
3170 be able to generate ELF binaries that can be translated into
3171 EFI applications (which are essentially COFF objects). Those
3172 files contain a COFF ".reloc" section inside an ELFNN object,
3173 which would normally cause BFD to segfault because it would
3174 attempt to interpret this section as containing relocation
3175 entries for section "oc". With this hack enabled, ".reloc"
3176 will be treated as a normal data section, which will avoid the
3177 segfault. However, you won't be able to create an ELFNN binary
3178 with a section named "oc" that needs relocations, but that's
3179 the kind of ugly side-effects you get when detecting section
3180 types based on their names... In practice, this limitation is
3181 unlikely to bite. */
3182 if (strcmp (name, ".reloc") == 0)
3183 hdr->sh_type = SHT_PROGBITS;
3184
3185 return TRUE;
3186 }
3187
3188 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3189 executables. Rather than setting it to the beginning of the TLS
3190 section, we have to set it to the end. This function may be called
3191 multiple times, it is idempotent. */
3192
3193 static void
3194 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3195 {
3196 struct elf_i386_link_hash_table *htab;
3197 struct bfd_link_hash_entry *base;
3198
3199 if (!info->executable)
3200 return;
3201
3202 htab = elf_i386_hash_table (info);
3203 if (htab == NULL)
3204 return;
3205
3206 base = htab->tls_module_base;
3207 if (base == NULL)
3208 return;
3209
3210 base->u.def.value = htab->elf.tls_size;
3211 }
3212
3213 /* Return the base VMA address which should be subtracted from real addresses
3214 when resolving @dtpoff relocation.
3215 This is PT_TLS segment p_vaddr. */
3216
3217 static bfd_vma
3218 elf_i386_dtpoff_base (struct bfd_link_info *info)
3219 {
3220 /* If tls_sec is NULL, we should have signalled an error already. */
3221 if (elf_hash_table (info)->tls_sec == NULL)
3222 return 0;
3223 return elf_hash_table (info)->tls_sec->vma;
3224 }
3225
3226 /* Return the relocation value for @tpoff relocation
3227 if STT_TLS virtual address is ADDRESS. */
3228
3229 static bfd_vma
3230 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3231 {
3232 struct elf_link_hash_table *htab = elf_hash_table (info);
3233 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3234 bfd_vma static_tls_size;
3235
3236 /* If tls_sec is NULL, we should have signalled an error already. */
3237 if (htab->tls_sec == NULL)
3238 return 0;
3239
3240 /* Consider special static TLS alignment requirements. */
3241 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3242 return static_tls_size + htab->tls_sec->vma - address;
3243 }
3244
3245 /* Relocate an i386 ELF section. */
3246
3247 static bfd_boolean
3248 elf_i386_relocate_section (bfd *output_bfd,
3249 struct bfd_link_info *info,
3250 bfd *input_bfd,
3251 asection *input_section,
3252 bfd_byte *contents,
3253 Elf_Internal_Rela *relocs,
3254 Elf_Internal_Sym *local_syms,
3255 asection **local_sections)
3256 {
3257 struct elf_i386_link_hash_table *htab;
3258 Elf_Internal_Shdr *symtab_hdr;
3259 struct elf_link_hash_entry **sym_hashes;
3260 bfd_vma *local_got_offsets;
3261 bfd_vma *local_tlsdesc_gotents;
3262 Elf_Internal_Rela *rel;
3263 Elf_Internal_Rela *relend;
3264 bfd_boolean is_vxworks_tls;
3265 unsigned plt_entry_size;
3266
3267 BFD_ASSERT (is_i386_elf (input_bfd));
3268
3269 htab = elf_i386_hash_table (info);
3270 if (htab == NULL)
3271 return FALSE;
3272 symtab_hdr = &elf_symtab_hdr (input_bfd);
3273 sym_hashes = elf_sym_hashes (input_bfd);
3274 local_got_offsets = elf_local_got_offsets (input_bfd);
3275 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3276 /* We have to handle relocations in vxworks .tls_vars sections
3277 specially, because the dynamic loader is 'weird'. */
3278 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3279 && info->shared
3280 && !strcmp (input_section->output_section->name,
3281 ".tls_vars"));
3282
3283 elf_i386_set_tls_module_base (info);
3284
3285 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3286
3287 rel = relocs;
3288 relend = relocs + input_section->reloc_count;
3289 for (; rel < relend; rel++)
3290 {
3291 unsigned int r_type;
3292 reloc_howto_type *howto;
3293 unsigned long r_symndx;
3294 struct elf_link_hash_entry *h;
3295 struct elf_i386_link_hash_entry *eh;
3296 Elf_Internal_Sym *sym;
3297 asection *sec;
3298 bfd_vma off, offplt, plt_offset;
3299 bfd_vma relocation;
3300 bfd_boolean unresolved_reloc;
3301 bfd_reloc_status_type r;
3302 unsigned int indx;
3303 int tls_type;
3304 bfd_vma st_size;
3305 asection *resolved_plt;
3306
3307 r_type = ELF32_R_TYPE (rel->r_info);
3308 if (r_type == R_386_GNU_VTINHERIT
3309 || r_type == R_386_GNU_VTENTRY)
3310 continue;
3311
3312 if ((indx = r_type) >= R_386_standard
3313 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3314 >= R_386_ext - R_386_standard)
3315 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3316 >= R_386_irelative - R_386_ext))
3317 {
3318 (*_bfd_error_handler)
3319 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3320 input_bfd, input_section, r_type);
3321 bfd_set_error (bfd_error_bad_value);
3322 return FALSE;
3323 }
3324 howto = elf_howto_table + indx;
3325
3326 r_symndx = ELF32_R_SYM (rel->r_info);
3327 h = NULL;
3328 sym = NULL;
3329 sec = NULL;
3330 unresolved_reloc = FALSE;
3331 if (r_symndx < symtab_hdr->sh_info)
3332 {
3333 sym = local_syms + r_symndx;
3334 sec = local_sections[r_symndx];
3335 relocation = (sec->output_section->vma
3336 + sec->output_offset
3337 + sym->st_value);
3338 st_size = sym->st_size;
3339
3340 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3341 && ((sec->flags & SEC_MERGE) != 0
3342 || (info->relocatable
3343 && sec->output_offset != 0)))
3344 {
3345 bfd_vma addend;
3346 bfd_byte *where = contents + rel->r_offset;
3347
3348 switch (howto->size)
3349 {
3350 case 0:
3351 addend = bfd_get_8 (input_bfd, where);
3352 if (howto->pc_relative)
3353 {
3354 addend = (addend ^ 0x80) - 0x80;
3355 addend += 1;
3356 }
3357 break;
3358 case 1:
3359 addend = bfd_get_16 (input_bfd, where);
3360 if (howto->pc_relative)
3361 {
3362 addend = (addend ^ 0x8000) - 0x8000;
3363 addend += 2;
3364 }
3365 break;
3366 case 2:
3367 addend = bfd_get_32 (input_bfd, where);
3368 if (howto->pc_relative)
3369 {
3370 addend = (addend ^ 0x80000000) - 0x80000000;
3371 addend += 4;
3372 }
3373 break;
3374 default:
3375 abort ();
3376 }
3377
3378 if (info->relocatable)
3379 addend += sec->output_offset;
3380 else
3381 {
3382 asection *msec = sec;
3383 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3384 addend);
3385 addend -= relocation;
3386 addend += msec->output_section->vma + msec->output_offset;
3387 }
3388
3389 switch (howto->size)
3390 {
3391 case 0:
3392 /* FIXME: overflow checks. */
3393 if (howto->pc_relative)
3394 addend -= 1;
3395 bfd_put_8 (input_bfd, addend, where);
3396 break;
3397 case 1:
3398 if (howto->pc_relative)
3399 addend -= 2;
3400 bfd_put_16 (input_bfd, addend, where);
3401 break;
3402 case 2:
3403 if (howto->pc_relative)
3404 addend -= 4;
3405 bfd_put_32 (input_bfd, addend, where);
3406 break;
3407 }
3408 }
3409 else if (!info->relocatable
3410 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3411 {
3412 /* Relocate against local STT_GNU_IFUNC symbol. */
3413 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3414 FALSE);
3415 if (h == NULL)
3416 abort ();
3417
3418 /* Set STT_GNU_IFUNC symbol value. */
3419 h->root.u.def.value = sym->st_value;
3420 h->root.u.def.section = sec;
3421 }
3422 }
3423 else
3424 {
3425 bfd_boolean warned ATTRIBUTE_UNUSED;
3426 bfd_boolean ignored ATTRIBUTE_UNUSED;
3427
3428 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3429 r_symndx, symtab_hdr, sym_hashes,
3430 h, sec, relocation,
3431 unresolved_reloc, warned, ignored);
3432 st_size = h->size;
3433 }
3434
3435 if (sec != NULL && discarded_section (sec))
3436 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3437 rel, 1, relend, howto, 0, contents);
3438
3439 if (info->relocatable)
3440 continue;
3441
3442 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3443 it here if it is defined in a non-shared object. */
3444 if (h != NULL
3445 && h->type == STT_GNU_IFUNC
3446 && h->def_regular)
3447 {
3448 asection *plt, *gotplt, *base_got;
3449 bfd_vma plt_index;
3450 const char *name;
3451
3452 if ((input_section->flags & SEC_ALLOC) == 0
3453 || h->plt.offset == (bfd_vma) -1)
3454 abort ();
3455
3456 /* STT_GNU_IFUNC symbol must go through PLT. */
3457 if (htab->elf.splt != NULL)
3458 {
3459 plt = htab->elf.splt;
3460 gotplt = htab->elf.sgotplt;
3461 }
3462 else
3463 {
3464 plt = htab->elf.iplt;
3465 gotplt = htab->elf.igotplt;
3466 }
3467
3468 relocation = (plt->output_section->vma
3469 + plt->output_offset + h->plt.offset);
3470
3471 switch (r_type)
3472 {
3473 default:
3474 if (h->root.root.string)
3475 name = h->root.root.string;
3476 else
3477 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3478 NULL);
3479 (*_bfd_error_handler)
3480 (_("%B: relocation %s against STT_GNU_IFUNC "
3481 "symbol `%s' isn't handled by %s"), input_bfd,
3482 elf_howto_table[r_type].name,
3483 name, __FUNCTION__);
3484 bfd_set_error (bfd_error_bad_value);
3485 return FALSE;
3486
3487 case R_386_32:
3488 /* Generate dynamic relcoation only when there is a
3489 non-GOT reference in a shared object. */
3490 if (info->shared && h->non_got_ref)
3491 {
3492 Elf_Internal_Rela outrel;
3493 asection *sreloc;
3494 bfd_vma offset;
3495
3496 /* Need a dynamic relocation to get the real function
3497 adddress. */
3498 offset = _bfd_elf_section_offset (output_bfd,
3499 info,
3500 input_section,
3501 rel->r_offset);
3502 if (offset == (bfd_vma) -1
3503 || offset == (bfd_vma) -2)
3504 abort ();
3505
3506 outrel.r_offset = (input_section->output_section->vma
3507 + input_section->output_offset
3508 + offset);
3509
3510 if (h->dynindx == -1
3511 || h->forced_local
3512 || info->executable)
3513 {
3514 /* This symbol is resolved locally. */
3515 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3516 bfd_put_32 (output_bfd,
3517 (h->root.u.def.value
3518 + h->root.u.def.section->output_section->vma
3519 + h->root.u.def.section->output_offset),
3520 contents + offset);
3521 }
3522 else
3523 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3524
3525 sreloc = htab->elf.irelifunc;
3526 elf_append_rel (output_bfd, sreloc, &outrel);
3527
3528 /* If this reloc is against an external symbol, we
3529 do not want to fiddle with the addend. Otherwise,
3530 we need to include the symbol value so that it
3531 becomes an addend for the dynamic reloc. For an
3532 internal symbol, we have updated addend. */
3533 continue;
3534 }
3535 /* FALLTHROUGH */
3536 case R_386_PC32:
3537 case R_386_PLT32:
3538 goto do_relocation;
3539
3540 case R_386_GOT32:
3541 base_got = htab->elf.sgot;
3542 off = h->got.offset;
3543
3544 if (base_got == NULL)
3545 abort ();
3546
3547 if (off == (bfd_vma) -1)
3548 {
3549 /* We can't use h->got.offset here to save state, or
3550 even just remember the offset, as finish_dynamic_symbol
3551 would use that as offset into .got. */
3552
3553 if (htab->elf.splt != NULL)
3554 {
3555 plt_index = h->plt.offset / plt_entry_size - 1;
3556 off = (plt_index + 3) * 4;
3557 base_got = htab->elf.sgotplt;
3558 }
3559 else
3560 {
3561 plt_index = h->plt.offset / plt_entry_size;
3562 off = plt_index * 4;
3563 base_got = htab->elf.igotplt;
3564 }
3565
3566 if (h->dynindx == -1
3567 || h->forced_local
3568 || info->symbolic)
3569 {
3570 /* This references the local defitionion. We must
3571 initialize this entry in the global offset table.
3572 Since the offset must always be a multiple of 8,
3573 we use the least significant bit to record
3574 whether we have initialized it already.
3575
3576 When doing a dynamic link, we create a .rela.got
3577 relocation entry to initialize the value. This
3578 is done in the finish_dynamic_symbol routine. */
3579 if ((off & 1) != 0)
3580 off &= ~1;
3581 else
3582 {
3583 bfd_put_32 (output_bfd, relocation,
3584 base_got->contents + off);
3585 h->got.offset |= 1;
3586 }
3587 }
3588
3589 relocation = off;
3590
3591 /* Adjust for static executables. */
3592 if (htab->elf.splt == NULL)
3593 relocation += gotplt->output_offset;
3594 }
3595 else
3596 {
3597 relocation = (base_got->output_section->vma
3598 + base_got->output_offset + off
3599 - gotplt->output_section->vma
3600 - gotplt->output_offset);
3601 /* Adjust for static executables. */
3602 if (htab->elf.splt == NULL)
3603 relocation += gotplt->output_offset;
3604 }
3605
3606 goto do_relocation;
3607
3608 case R_386_GOTOFF:
3609 relocation -= (gotplt->output_section->vma
3610 + gotplt->output_offset);
3611 goto do_relocation;
3612 }
3613 }
3614
3615 switch (r_type)
3616 {
3617 case R_386_GOT32:
3618 /* Relocation is to the entry for this symbol in the global
3619 offset table. */
3620 if (htab->elf.sgot == NULL)
3621 abort ();
3622
3623 if (h != NULL)
3624 {
3625 bfd_boolean dyn;
3626
3627 off = h->got.offset;
3628 dyn = htab->elf.dynamic_sections_created;
3629 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3630 || (info->shared
3631 && SYMBOL_REFERENCES_LOCAL (info, h))
3632 || (ELF_ST_VISIBILITY (h->other)
3633 && h->root.type == bfd_link_hash_undefweak))
3634 {
3635 /* This is actually a static link, or it is a
3636 -Bsymbolic link and the symbol is defined
3637 locally, or the symbol was forced to be local
3638 because of a version file. We must initialize
3639 this entry in the global offset table. Since the
3640 offset must always be a multiple of 4, we use the
3641 least significant bit to record whether we have
3642 initialized it already.
3643
3644 When doing a dynamic link, we create a .rel.got
3645 relocation entry to initialize the value. This
3646 is done in the finish_dynamic_symbol routine. */
3647 if ((off & 1) != 0)
3648 off &= ~1;
3649 else
3650 {
3651 bfd_put_32 (output_bfd, relocation,
3652 htab->elf.sgot->contents + off);
3653 h->got.offset |= 1;
3654 }
3655 }
3656 else
3657 unresolved_reloc = FALSE;
3658 }
3659 else
3660 {
3661 if (local_got_offsets == NULL)
3662 abort ();
3663
3664 off = local_got_offsets[r_symndx];
3665
3666 /* The offset must always be a multiple of 4. We use
3667 the least significant bit to record whether we have
3668 already generated the necessary reloc. */
3669 if ((off & 1) != 0)
3670 off &= ~1;
3671 else
3672 {
3673 bfd_put_32 (output_bfd, relocation,
3674 htab->elf.sgot->contents + off);
3675
3676 if (info->shared)
3677 {
3678 asection *s;
3679 Elf_Internal_Rela outrel;
3680
3681 s = htab->elf.srelgot;
3682 if (s == NULL)
3683 abort ();
3684
3685 outrel.r_offset = (htab->elf.sgot->output_section->vma
3686 + htab->elf.sgot->output_offset
3687 + off);
3688 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3689 elf_append_rel (output_bfd, s, &outrel);
3690 }
3691
3692 local_got_offsets[r_symndx] |= 1;
3693 }
3694 }
3695
3696 if (off >= (bfd_vma) -2)
3697 abort ();
3698
3699 relocation = htab->elf.sgot->output_section->vma
3700 + htab->elf.sgot->output_offset + off
3701 - htab->elf.sgotplt->output_section->vma
3702 - htab->elf.sgotplt->output_offset;
3703 break;
3704
3705 case R_386_GOTOFF:
3706 /* Relocation is relative to the start of the global offset
3707 table. */
3708
3709 /* Check to make sure it isn't a protected function symbol
3710 for shared library since it may not be local when used
3711 as function address. We also need to make sure that a
3712 symbol is defined locally. */
3713 if (info->shared && h)
3714 {
3715 if (!h->def_regular)
3716 {
3717 const char *v;
3718
3719 switch (ELF_ST_VISIBILITY (h->other))
3720 {
3721 case STV_HIDDEN:
3722 v = _("hidden symbol");
3723 break;
3724 case STV_INTERNAL:
3725 v = _("internal symbol");
3726 break;
3727 case STV_PROTECTED:
3728 v = _("protected symbol");
3729 break;
3730 default:
3731 v = _("symbol");
3732 break;
3733 }
3734
3735 (*_bfd_error_handler)
3736 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3737 input_bfd, v, h->root.root.string);
3738 bfd_set_error (bfd_error_bad_value);
3739 return FALSE;
3740 }
3741 else if (!info->executable
3742 && !SYMBOLIC_BIND (info, h)
3743 && h->type == STT_FUNC
3744 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3745 {
3746 (*_bfd_error_handler)
3747 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3748 input_bfd, h->root.root.string);
3749 bfd_set_error (bfd_error_bad_value);
3750 return FALSE;
3751 }
3752 }
3753
3754 /* Note that sgot is not involved in this
3755 calculation. We always want the start of .got.plt. If we
3756 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3757 permitted by the ABI, we might have to change this
3758 calculation. */
3759 relocation -= htab->elf.sgotplt->output_section->vma
3760 + htab->elf.sgotplt->output_offset;
3761 break;
3762
3763 case R_386_GOTPC:
3764 /* Use global offset table as symbol value. */
3765 relocation = htab->elf.sgotplt->output_section->vma
3766 + htab->elf.sgotplt->output_offset;
3767 unresolved_reloc = FALSE;
3768 break;
3769
3770 case R_386_PLT32:
3771 /* Relocation is to the entry for this symbol in the
3772 procedure linkage table. */
3773
3774 /* Resolve a PLT32 reloc against a local symbol directly,
3775 without using the procedure linkage table. */
3776 if (h == NULL)
3777 break;
3778
3779 eh = (struct elf_i386_link_hash_entry *) h;
3780 if ((h->plt.offset == (bfd_vma) -1
3781 && eh->plt_got.offset == (bfd_vma) -1)
3782 || htab->elf.splt == NULL)
3783 {
3784 /* We didn't make a PLT entry for this symbol. This
3785 happens when statically linking PIC code, or when
3786 using -Bsymbolic. */
3787 break;
3788 }
3789
3790 if (h->plt.offset != (bfd_vma) -1)
3791 {
3792 resolved_plt = htab->elf.splt;
3793 plt_offset = h->plt.offset;
3794 }
3795 else
3796 {
3797 resolved_plt = htab->plt_got;
3798 plt_offset = eh->plt_got.offset;
3799 }
3800
3801 relocation = (resolved_plt->output_section->vma
3802 + resolved_plt->output_offset
3803 + plt_offset);
3804 unresolved_reloc = FALSE;
3805 break;
3806
3807 case R_386_SIZE32:
3808 /* Set to symbol size. */
3809 relocation = st_size;
3810 /* Fall through. */
3811
3812 case R_386_32:
3813 case R_386_PC32:
3814 if ((input_section->flags & SEC_ALLOC) == 0
3815 || is_vxworks_tls)
3816 break;
3817
3818 if ((info->shared
3819 && (h == NULL
3820 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3821 || h->root.type != bfd_link_hash_undefweak)
3822 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3823 || !SYMBOL_CALLS_LOCAL (info, h)))
3824 || (ELIMINATE_COPY_RELOCS
3825 && !info->shared
3826 && h != NULL
3827 && h->dynindx != -1
3828 && !h->non_got_ref
3829 && ((h->def_dynamic
3830 && !h->def_regular)
3831 || h->root.type == bfd_link_hash_undefweak
3832 || h->root.type == bfd_link_hash_undefined)))
3833 {
3834 Elf_Internal_Rela outrel;
3835 bfd_boolean skip, relocate;
3836 asection *sreloc;
3837
3838 /* When generating a shared object, these relocations
3839 are copied into the output file to be resolved at run
3840 time. */
3841
3842 skip = FALSE;
3843 relocate = FALSE;
3844
3845 outrel.r_offset =
3846 _bfd_elf_section_offset (output_bfd, info, input_section,
3847 rel->r_offset);
3848 if (outrel.r_offset == (bfd_vma) -1)
3849 skip = TRUE;
3850 else if (outrel.r_offset == (bfd_vma) -2)
3851 skip = TRUE, relocate = TRUE;
3852 outrel.r_offset += (input_section->output_section->vma
3853 + input_section->output_offset);
3854
3855 if (skip)
3856 memset (&outrel, 0, sizeof outrel);
3857 else if (h != NULL
3858 && h->dynindx != -1
3859 && (r_type == R_386_PC32
3860 || !info->shared
3861 || !SYMBOLIC_BIND (info, h)
3862 || !h->def_regular))
3863 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3864 else
3865 {
3866 /* This symbol is local, or marked to become local. */
3867 relocate = TRUE;
3868 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3869 }
3870
3871 sreloc = elf_section_data (input_section)->sreloc;
3872
3873 if (sreloc == NULL || sreloc->contents == NULL)
3874 {
3875 r = bfd_reloc_notsupported;
3876 goto check_relocation_error;
3877 }
3878
3879 elf_append_rel (output_bfd, sreloc, &outrel);
3880
3881 /* If this reloc is against an external symbol, we do
3882 not want to fiddle with the addend. Otherwise, we
3883 need to include the symbol value so that it becomes
3884 an addend for the dynamic reloc. */
3885 if (! relocate)
3886 continue;
3887 }
3888 break;
3889
3890 case R_386_TLS_IE:
3891 if (!info->executable)
3892 {
3893 Elf_Internal_Rela outrel;
3894 asection *sreloc;
3895
3896 outrel.r_offset = rel->r_offset
3897 + input_section->output_section->vma
3898 + input_section->output_offset;
3899 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3900 sreloc = elf_section_data (input_section)->sreloc;
3901 if (sreloc == NULL)
3902 abort ();
3903 elf_append_rel (output_bfd, sreloc, &outrel);
3904 }
3905 /* Fall through */
3906
3907 case R_386_TLS_GD:
3908 case R_386_TLS_GOTDESC:
3909 case R_386_TLS_DESC_CALL:
3910 case R_386_TLS_IE_32:
3911 case R_386_TLS_GOTIE:
3912 tls_type = GOT_UNKNOWN;
3913 if (h == NULL && local_got_offsets)
3914 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3915 else if (h != NULL)
3916 tls_type = elf_i386_hash_entry(h)->tls_type;
3917 if (tls_type == GOT_TLS_IE)
3918 tls_type = GOT_TLS_IE_NEG;
3919
3920 if (! elf_i386_tls_transition (info, input_bfd,
3921 input_section, contents,
3922 symtab_hdr, sym_hashes,
3923 &r_type, tls_type, rel,
3924 relend, h, r_symndx))
3925 return FALSE;
3926
3927 if (r_type == R_386_TLS_LE_32)
3928 {
3929 BFD_ASSERT (! unresolved_reloc);
3930 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3931 {
3932 unsigned int type;
3933 bfd_vma roff;
3934
3935 /* GD->LE transition. */
3936 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3937 if (type == 0x04)
3938 {
3939 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3940 Change it into:
3941 movl %gs:0, %eax; subl $foo@tpoff, %eax
3942 (6 byte form of subl). */
3943 memcpy (contents + rel->r_offset - 3,
3944 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3945 roff = rel->r_offset + 5;
3946 }
3947 else
3948 {
3949 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3950 Change it into:
3951 movl %gs:0, %eax; subl $foo@tpoff, %eax
3952 (6 byte form of subl). */
3953 memcpy (contents + rel->r_offset - 2,
3954 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3955 roff = rel->r_offset + 6;
3956 }
3957 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3958 contents + roff);
3959 /* Skip R_386_PC32/R_386_PLT32. */
3960 rel++;
3961 continue;
3962 }
3963 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3964 {
3965 /* GDesc -> LE transition.
3966 It's originally something like:
3967 leal x@tlsdesc(%ebx), %eax
3968
3969 leal x@ntpoff, %eax
3970
3971 Registers other than %eax may be set up here. */
3972
3973 unsigned int val;
3974 bfd_vma roff;
3975
3976 roff = rel->r_offset;
3977 val = bfd_get_8 (input_bfd, contents + roff - 1);
3978
3979 /* Now modify the instruction as appropriate. */
3980 /* aoliva FIXME: remove the above and xor the byte
3981 below with 0x86. */
3982 bfd_put_8 (output_bfd, val ^ 0x86,
3983 contents + roff - 1);
3984 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3985 contents + roff);
3986 continue;
3987 }
3988 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3989 {
3990 /* GDesc -> LE transition.
3991 It's originally:
3992 call *(%eax)
3993 Turn it into:
3994 xchg %ax,%ax */
3995
3996 bfd_vma roff;
3997
3998 roff = rel->r_offset;
3999 bfd_put_8 (output_bfd, 0x66, contents + roff);
4000 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4001 continue;
4002 }
4003 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4004 {
4005 unsigned int val;
4006
4007 /* IE->LE transition:
4008 Originally it can be one of:
4009 movl foo, %eax
4010 movl foo, %reg
4011 addl foo, %reg
4012 We change it into:
4013 movl $foo, %eax
4014 movl $foo, %reg
4015 addl $foo, %reg. */
4016 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4017 if (val == 0xa1)
4018 {
4019 /* movl foo, %eax. */
4020 bfd_put_8 (output_bfd, 0xb8,
4021 contents + rel->r_offset - 1);
4022 }
4023 else
4024 {
4025 unsigned int type;
4026
4027 type = bfd_get_8 (input_bfd,
4028 contents + rel->r_offset - 2);
4029 switch (type)
4030 {
4031 case 0x8b:
4032 /* movl */
4033 bfd_put_8 (output_bfd, 0xc7,
4034 contents + rel->r_offset - 2);
4035 bfd_put_8 (output_bfd,
4036 0xc0 | ((val >> 3) & 7),
4037 contents + rel->r_offset - 1);
4038 break;
4039 case 0x03:
4040 /* addl */
4041 bfd_put_8 (output_bfd, 0x81,
4042 contents + rel->r_offset - 2);
4043 bfd_put_8 (output_bfd,
4044 0xc0 | ((val >> 3) & 7),
4045 contents + rel->r_offset - 1);
4046 break;
4047 default:
4048 BFD_FAIL ();
4049 break;
4050 }
4051 }
4052 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4053 contents + rel->r_offset);
4054 continue;
4055 }
4056 else
4057 {
4058 unsigned int val, type;
4059
4060 /* {IE_32,GOTIE}->LE transition:
4061 Originally it can be one of:
4062 subl foo(%reg1), %reg2
4063 movl foo(%reg1), %reg2
4064 addl foo(%reg1), %reg2
4065 We change it into:
4066 subl $foo, %reg2
4067 movl $foo, %reg2 (6 byte form)
4068 addl $foo, %reg2. */
4069 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4070 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4071 if (type == 0x8b)
4072 {
4073 /* movl */
4074 bfd_put_8 (output_bfd, 0xc7,
4075 contents + rel->r_offset - 2);
4076 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4077 contents + rel->r_offset - 1);
4078 }
4079 else if (type == 0x2b)
4080 {
4081 /* subl */
4082 bfd_put_8 (output_bfd, 0x81,
4083 contents + rel->r_offset - 2);
4084 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4085 contents + rel->r_offset - 1);
4086 }
4087 else if (type == 0x03)
4088 {
4089 /* addl */
4090 bfd_put_8 (output_bfd, 0x81,
4091 contents + rel->r_offset - 2);
4092 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4093 contents + rel->r_offset - 1);
4094 }
4095 else
4096 BFD_FAIL ();
4097 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4098 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4099 contents + rel->r_offset);
4100 else
4101 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4102 contents + rel->r_offset);
4103 continue;
4104 }
4105 }
4106
4107 if (htab->elf.sgot == NULL)
4108 abort ();
4109
4110 if (h != NULL)
4111 {
4112 off = h->got.offset;
4113 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4114 }
4115 else
4116 {
4117 if (local_got_offsets == NULL)
4118 abort ();
4119
4120 off = local_got_offsets[r_symndx];
4121 offplt = local_tlsdesc_gotents[r_symndx];
4122 }
4123
4124 if ((off & 1) != 0)
4125 off &= ~1;
4126 else
4127 {
4128 Elf_Internal_Rela outrel;
4129 int dr_type;
4130 asection *sreloc;
4131
4132 if (htab->elf.srelgot == NULL)
4133 abort ();
4134
4135 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4136
4137 if (GOT_TLS_GDESC_P (tls_type))
4138 {
4139 bfd_byte *loc;
4140 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4141 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4142 <= htab->elf.sgotplt->size);
4143 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4144 + htab->elf.sgotplt->output_offset
4145 + offplt
4146 + htab->sgotplt_jump_table_size);
4147 sreloc = htab->elf.srelplt;
4148 loc = sreloc->contents;
4149 loc += (htab->next_tls_desc_index++
4150 * sizeof (Elf32_External_Rel));
4151 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4152 <= sreloc->contents + sreloc->size);
4153 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4154 if (indx == 0)
4155 {
4156 BFD_ASSERT (! unresolved_reloc);
4157 bfd_put_32 (output_bfd,
4158 relocation - elf_i386_dtpoff_base (info),
4159 htab->elf.sgotplt->contents + offplt
4160 + htab->sgotplt_jump_table_size + 4);
4161 }
4162 else
4163 {
4164 bfd_put_32 (output_bfd, 0,
4165 htab->elf.sgotplt->contents + offplt
4166 + htab->sgotplt_jump_table_size + 4);
4167 }
4168 }
4169
4170 sreloc = htab->elf.srelgot;
4171
4172 outrel.r_offset = (htab->elf.sgot->output_section->vma
4173 + htab->elf.sgot->output_offset + off);
4174
4175 if (GOT_TLS_GD_P (tls_type))
4176 dr_type = R_386_TLS_DTPMOD32;
4177 else if (GOT_TLS_GDESC_P (tls_type))
4178 goto dr_done;
4179 else if (tls_type == GOT_TLS_IE_POS)
4180 dr_type = R_386_TLS_TPOFF;
4181 else
4182 dr_type = R_386_TLS_TPOFF32;
4183
4184 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4185 bfd_put_32 (output_bfd,
4186 relocation - elf_i386_dtpoff_base (info),
4187 htab->elf.sgot->contents + off);
4188 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4189 bfd_put_32 (output_bfd,
4190 elf_i386_dtpoff_base (info) - relocation,
4191 htab->elf.sgot->contents + off);
4192 else if (dr_type != R_386_TLS_DESC)
4193 bfd_put_32 (output_bfd, 0,
4194 htab->elf.sgot->contents + off);
4195 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4196
4197 elf_append_rel (output_bfd, sreloc, &outrel);
4198
4199 if (GOT_TLS_GD_P (tls_type))
4200 {
4201 if (indx == 0)
4202 {
4203 BFD_ASSERT (! unresolved_reloc);
4204 bfd_put_32 (output_bfd,
4205 relocation - elf_i386_dtpoff_base (info),
4206 htab->elf.sgot->contents + off + 4);
4207 }
4208 else
4209 {
4210 bfd_put_32 (output_bfd, 0,
4211 htab->elf.sgot->contents + off + 4);
4212 outrel.r_info = ELF32_R_INFO (indx,
4213 R_386_TLS_DTPOFF32);
4214 outrel.r_offset += 4;
4215 elf_append_rel (output_bfd, sreloc, &outrel);
4216 }
4217 }
4218 else if (tls_type == GOT_TLS_IE_BOTH)
4219 {
4220 bfd_put_32 (output_bfd,
4221 (indx == 0
4222 ? relocation - elf_i386_dtpoff_base (info)
4223 : 0),
4224 htab->elf.sgot->contents + off + 4);
4225 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4226 outrel.r_offset += 4;
4227 elf_append_rel (output_bfd, sreloc, &outrel);
4228 }
4229
4230 dr_done:
4231 if (h != NULL)
4232 h->got.offset |= 1;
4233 else
4234 local_got_offsets[r_symndx] |= 1;
4235 }
4236
4237 if (off >= (bfd_vma) -2
4238 && ! GOT_TLS_GDESC_P (tls_type))
4239 abort ();
4240 if (r_type == R_386_TLS_GOTDESC
4241 || r_type == R_386_TLS_DESC_CALL)
4242 {
4243 relocation = htab->sgotplt_jump_table_size + offplt;
4244 unresolved_reloc = FALSE;
4245 }
4246 else if (r_type == ELF32_R_TYPE (rel->r_info))
4247 {
4248 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4249 + htab->elf.sgotplt->output_offset;
4250 relocation = htab->elf.sgot->output_section->vma
4251 + htab->elf.sgot->output_offset + off - g_o_t;
4252 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4253 && tls_type == GOT_TLS_IE_BOTH)
4254 relocation += 4;
4255 if (r_type == R_386_TLS_IE)
4256 relocation += g_o_t;
4257 unresolved_reloc = FALSE;
4258 }
4259 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4260 {
4261 unsigned int val, type;
4262 bfd_vma roff;
4263
4264 /* GD->IE transition. */
4265 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4266 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4267 if (type == 0x04)
4268 {
4269 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4270 Change it into:
4271 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4272 val >>= 3;
4273 roff = rel->r_offset - 3;
4274 }
4275 else
4276 {
4277 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4278 Change it into:
4279 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4280 roff = rel->r_offset - 2;
4281 }
4282 memcpy (contents + roff,
4283 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4284 contents[roff + 7] = 0x80 | (val & 7);
4285 /* If foo is used only with foo@gotntpoff(%reg) and
4286 foo@indntpoff, but not with foo@gottpoff(%reg), change
4287 subl $foo@gottpoff(%reg), %eax
4288 into:
4289 addl $foo@gotntpoff(%reg), %eax. */
4290 if (tls_type == GOT_TLS_IE_POS)
4291 contents[roff + 6] = 0x03;
4292 bfd_put_32 (output_bfd,
4293 htab->elf.sgot->output_section->vma
4294 + htab->elf.sgot->output_offset + off
4295 - htab->elf.sgotplt->output_section->vma
4296 - htab->elf.sgotplt->output_offset,
4297 contents + roff + 8);
4298 /* Skip R_386_PLT32. */
4299 rel++;
4300 continue;
4301 }
4302 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4303 {
4304 /* GDesc -> IE transition.
4305 It's originally something like:
4306 leal x@tlsdesc(%ebx), %eax
4307
4308 Change it to:
4309 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4310 or:
4311 movl x@gottpoff(%ebx), %eax # before negl %eax
4312
4313 Registers other than %eax may be set up here. */
4314
4315 bfd_vma roff;
4316
4317 /* First, make sure it's a leal adding ebx to a 32-bit
4318 offset into any register, although it's probably
4319 almost always going to be eax. */
4320 roff = rel->r_offset;
4321
4322 /* Now modify the instruction as appropriate. */
4323 /* To turn a leal into a movl in the form we use it, it
4324 suffices to change the first byte from 0x8d to 0x8b.
4325 aoliva FIXME: should we decide to keep the leal, all
4326 we have to do is remove the statement below, and
4327 adjust the relaxation of R_386_TLS_DESC_CALL. */
4328 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4329
4330 if (tls_type == GOT_TLS_IE_BOTH)
4331 off += 4;
4332
4333 bfd_put_32 (output_bfd,
4334 htab->elf.sgot->output_section->vma
4335 + htab->elf.sgot->output_offset + off
4336 - htab->elf.sgotplt->output_section->vma
4337 - htab->elf.sgotplt->output_offset,
4338 contents + roff);
4339 continue;
4340 }
4341 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4342 {
4343 /* GDesc -> IE transition.
4344 It's originally:
4345 call *(%eax)
4346
4347 Change it to:
4348 xchg %ax,%ax
4349 or
4350 negl %eax
4351 depending on how we transformed the TLS_GOTDESC above.
4352 */
4353
4354 bfd_vma roff;
4355
4356 roff = rel->r_offset;
4357
4358 /* Now modify the instruction as appropriate. */
4359 if (tls_type != GOT_TLS_IE_NEG)
4360 {
4361 /* xchg %ax,%ax */
4362 bfd_put_8 (output_bfd, 0x66, contents + roff);
4363 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4364 }
4365 else
4366 {
4367 /* negl %eax */
4368 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4369 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4370 }
4371
4372 continue;
4373 }
4374 else
4375 BFD_ASSERT (FALSE);
4376 break;
4377
4378 case R_386_TLS_LDM:
4379 if (! elf_i386_tls_transition (info, input_bfd,
4380 input_section, contents,
4381 symtab_hdr, sym_hashes,
4382 &r_type, GOT_UNKNOWN, rel,
4383 relend, h, r_symndx))
4384 return FALSE;
4385
4386 if (r_type != R_386_TLS_LDM)
4387 {
4388 /* LD->LE transition:
4389 leal foo(%reg), %eax; call ___tls_get_addr.
4390 We change it into:
4391 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4392 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4393 memcpy (contents + rel->r_offset - 2,
4394 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4395 /* Skip R_386_PC32/R_386_PLT32. */
4396 rel++;
4397 continue;
4398 }
4399
4400 if (htab->elf.sgot == NULL)
4401 abort ();
4402
4403 off = htab->tls_ldm_got.offset;
4404 if (off & 1)
4405 off &= ~1;
4406 else
4407 {
4408 Elf_Internal_Rela outrel;
4409
4410 if (htab->elf.srelgot == NULL)
4411 abort ();
4412
4413 outrel.r_offset = (htab->elf.sgot->output_section->vma
4414 + htab->elf.sgot->output_offset + off);
4415
4416 bfd_put_32 (output_bfd, 0,
4417 htab->elf.sgot->contents + off);
4418 bfd_put_32 (output_bfd, 0,
4419 htab->elf.sgot->contents + off + 4);
4420 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4421 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4422 htab->tls_ldm_got.offset |= 1;
4423 }
4424 relocation = htab->elf.sgot->output_section->vma
4425 + htab->elf.sgot->output_offset + off
4426 - htab->elf.sgotplt->output_section->vma
4427 - htab->elf.sgotplt->output_offset;
4428 unresolved_reloc = FALSE;
4429 break;
4430
4431 case R_386_TLS_LDO_32:
4432 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4433 relocation -= elf_i386_dtpoff_base (info);
4434 else
4435 /* When converting LDO to LE, we must negate. */
4436 relocation = -elf_i386_tpoff (info, relocation);
4437 break;
4438
4439 case R_386_TLS_LE_32:
4440 case R_386_TLS_LE:
4441 if (!info->executable)
4442 {
4443 Elf_Internal_Rela outrel;
4444 asection *sreloc;
4445
4446 outrel.r_offset = rel->r_offset
4447 + input_section->output_section->vma
4448 + input_section->output_offset;
4449 if (h != NULL && h->dynindx != -1)
4450 indx = h->dynindx;
4451 else
4452 indx = 0;
4453 if (r_type == R_386_TLS_LE_32)
4454 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4455 else
4456 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4457 sreloc = elf_section_data (input_section)->sreloc;
4458 if (sreloc == NULL)
4459 abort ();
4460 elf_append_rel (output_bfd, sreloc, &outrel);
4461 if (indx)
4462 continue;
4463 else if (r_type == R_386_TLS_LE_32)
4464 relocation = elf_i386_dtpoff_base (info) - relocation;
4465 else
4466 relocation -= elf_i386_dtpoff_base (info);
4467 }
4468 else if (r_type == R_386_TLS_LE_32)
4469 relocation = elf_i386_tpoff (info, relocation);
4470 else
4471 relocation = -elf_i386_tpoff (info, relocation);
4472 break;
4473
4474 default:
4475 break;
4476 }
4477
4478 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4479 because such sections are not SEC_ALLOC and thus ld.so will
4480 not process them. */
4481 if (unresolved_reloc
4482 && !((input_section->flags & SEC_DEBUGGING) != 0
4483 && h->def_dynamic)
4484 && _bfd_elf_section_offset (output_bfd, info, input_section,
4485 rel->r_offset) != (bfd_vma) -1)
4486 {
4487 (*_bfd_error_handler)
4488 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4489 input_bfd,
4490 input_section,
4491 (long) rel->r_offset,
4492 howto->name,
4493 h->root.root.string);
4494 return FALSE;
4495 }
4496
4497 do_relocation:
4498 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4499 contents, rel->r_offset,
4500 relocation, 0);
4501
4502 check_relocation_error:
4503 if (r != bfd_reloc_ok)
4504 {
4505 const char *name;
4506
4507 if (h != NULL)
4508 name = h->root.root.string;
4509 else
4510 {
4511 name = bfd_elf_string_from_elf_section (input_bfd,
4512 symtab_hdr->sh_link,
4513 sym->st_name);
4514 if (name == NULL)
4515 return FALSE;
4516 if (*name == '\0')
4517 name = bfd_section_name (input_bfd, sec);
4518 }
4519
4520 if (r == bfd_reloc_overflow)
4521 {
4522 if (! ((*info->callbacks->reloc_overflow)
4523 (info, (h ? &h->root : NULL), name, howto->name,
4524 (bfd_vma) 0, input_bfd, input_section,
4525 rel->r_offset)))
4526 return FALSE;
4527 }
4528 else
4529 {
4530 (*_bfd_error_handler)
4531 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4532 input_bfd, input_section,
4533 (long) rel->r_offset, name, (int) r);
4534 return FALSE;
4535 }
4536 }
4537 }
4538
4539 return TRUE;
4540 }
4541
4542 /* Finish up dynamic symbol handling. We set the contents of various
4543 dynamic sections here. */
4544
4545 static bfd_boolean
4546 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4547 struct bfd_link_info *info,
4548 struct elf_link_hash_entry *h,
4549 Elf_Internal_Sym *sym)
4550 {
4551 struct elf_i386_link_hash_table *htab;
4552 unsigned plt_entry_size;
4553 const struct elf_i386_backend_data *abed;
4554 struct elf_i386_link_hash_entry *eh;
4555
4556 htab = elf_i386_hash_table (info);
4557 if (htab == NULL)
4558 return FALSE;
4559
4560 abed = get_elf_i386_backend_data (output_bfd);
4561 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4562
4563 eh = (struct elf_i386_link_hash_entry *) h;
4564
4565 if (h->plt.offset != (bfd_vma) -1)
4566 {
4567 bfd_vma plt_index;
4568 bfd_vma got_offset;
4569 Elf_Internal_Rela rel;
4570 bfd_byte *loc;
4571 asection *plt, *gotplt, *relplt;
4572
4573 /* When building a static executable, use .iplt, .igot.plt and
4574 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4575 if (htab->elf.splt != NULL)
4576 {
4577 plt = htab->elf.splt;
4578 gotplt = htab->elf.sgotplt;
4579 relplt = htab->elf.srelplt;
4580 }
4581 else
4582 {
4583 plt = htab->elf.iplt;
4584 gotplt = htab->elf.igotplt;
4585 relplt = htab->elf.irelplt;
4586 }
4587
4588 /* This symbol has an entry in the procedure linkage table. Set
4589 it up. */
4590
4591 if ((h->dynindx == -1
4592 && !((h->forced_local || info->executable)
4593 && h->def_regular
4594 && h->type == STT_GNU_IFUNC))
4595 || plt == NULL
4596 || gotplt == NULL
4597 || relplt == NULL)
4598 abort ();
4599
4600 /* Get the index in the procedure linkage table which
4601 corresponds to this symbol. This is the index of this symbol
4602 in all the symbols for which we are making plt entries. The
4603 first entry in the procedure linkage table is reserved.
4604
4605 Get the offset into the .got table of the entry that
4606 corresponds to this function. Each .got entry is 4 bytes.
4607 The first three are reserved.
4608
4609 For static executables, we don't reserve anything. */
4610
4611 if (plt == htab->elf.splt)
4612 {
4613 got_offset = h->plt.offset / plt_entry_size - 1;
4614 got_offset = (got_offset + 3) * 4;
4615 }
4616 else
4617 {
4618 got_offset = h->plt.offset / plt_entry_size;
4619 got_offset = got_offset * 4;
4620 }
4621
4622 /* Fill in the entry in the procedure linkage table. */
4623 if (! info->shared)
4624 {
4625 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4626 abed->plt->plt_entry_size);
4627 bfd_put_32 (output_bfd,
4628 (gotplt->output_section->vma
4629 + gotplt->output_offset
4630 + got_offset),
4631 plt->contents + h->plt.offset
4632 + abed->plt->plt_got_offset);
4633
4634 if (abed->is_vxworks)
4635 {
4636 int s, k, reloc_index;
4637
4638 /* Create the R_386_32 relocation referencing the GOT
4639 for this PLT entry. */
4640
4641 /* S: Current slot number (zero-based). */
4642 s = ((h->plt.offset - abed->plt->plt_entry_size)
4643 / abed->plt->plt_entry_size);
4644 /* K: Number of relocations for PLTResolve. */
4645 if (info->shared)
4646 k = PLTRESOLVE_RELOCS_SHLIB;
4647 else
4648 k = PLTRESOLVE_RELOCS;
4649 /* Skip the PLTresolve relocations, and the relocations for
4650 the other PLT slots. */
4651 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4652 loc = (htab->srelplt2->contents + reloc_index
4653 * sizeof (Elf32_External_Rel));
4654
4655 rel.r_offset = (htab->elf.splt->output_section->vma
4656 + htab->elf.splt->output_offset
4657 + h->plt.offset + 2),
4658 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4659 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4660
4661 /* Create the R_386_32 relocation referencing the beginning of
4662 the PLT for this GOT entry. */
4663 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4664 + htab->elf.sgotplt->output_offset
4665 + got_offset);
4666 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4667 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4668 loc + sizeof (Elf32_External_Rel));
4669 }
4670 }
4671 else
4672 {
4673 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4674 abed->plt->plt_entry_size);
4675 bfd_put_32 (output_bfd, got_offset,
4676 plt->contents + h->plt.offset
4677 + abed->plt->plt_got_offset);
4678 }
4679
4680 /* Fill in the entry in the global offset table. */
4681 bfd_put_32 (output_bfd,
4682 (plt->output_section->vma
4683 + plt->output_offset
4684 + h->plt.offset
4685 + abed->plt->plt_lazy_offset),
4686 gotplt->contents + got_offset);
4687
4688 /* Fill in the entry in the .rel.plt section. */
4689 rel.r_offset = (gotplt->output_section->vma
4690 + gotplt->output_offset
4691 + got_offset);
4692 if (h->dynindx == -1
4693 || ((info->executable
4694 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4695 && h->def_regular
4696 && h->type == STT_GNU_IFUNC))
4697 {
4698 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4699 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4700 in the .got.plt section. */
4701 bfd_put_32 (output_bfd,
4702 (h->root.u.def.value
4703 + h->root.u.def.section->output_section->vma
4704 + h->root.u.def.section->output_offset),
4705 gotplt->contents + got_offset);
4706 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4707 /* R_386_IRELATIVE comes last. */
4708 plt_index = htab->next_irelative_index--;
4709 }
4710 else
4711 {
4712 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4713 plt_index = htab->next_jump_slot_index++;
4714 }
4715 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4716 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4717
4718 /* Don't fill PLT entry for static executables. */
4719 if (plt == htab->elf.splt)
4720 {
4721 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4722 plt->contents + h->plt.offset
4723 + abed->plt->plt_reloc_offset);
4724 bfd_put_32 (output_bfd, - (h->plt.offset
4725 + abed->plt->plt_plt_offset + 4),
4726 plt->contents + h->plt.offset
4727 + abed->plt->plt_plt_offset);
4728 }
4729 }
4730 else if (eh->plt_got.offset != (bfd_vma) -1)
4731 {
4732 bfd_vma got_offset, plt_offset;
4733 asection *plt, *got, *gotplt;
4734 const bfd_byte *got_plt_entry;
4735
4736 /* Offset of displacement of the indirect jump. */
4737 bfd_vma plt_got_offset = 2;
4738
4739 /* Set the entry in the GOT procedure linkage table. */
4740 plt = htab->plt_got;
4741 got = htab->elf.sgot;
4742 gotplt = htab->elf.sgotplt;
4743 got_offset = h->got.offset;
4744
4745 if (got_offset == (bfd_vma) -1
4746 || plt == NULL
4747 || got == NULL
4748 || gotplt == NULL)
4749 abort ();
4750
4751 /* Fill in the entry in the GOT procedure linkage table. */
4752 if (! info->shared)
4753 {
4754 got_plt_entry = elf_i386_got_plt_entry;
4755 got_offset += got->output_section->vma + got->output_offset;
4756 }
4757 else
4758 {
4759 got_plt_entry = elf_i386_pic_got_plt_entry;
4760 got_offset += (got->output_section->vma
4761 + got->output_offset
4762 - gotplt->output_section->vma
4763 - gotplt->output_offset);
4764 }
4765
4766 plt_offset = eh->plt_got.offset;
4767 memcpy (plt->contents + plt_offset, got_plt_entry,
4768 sizeof (elf_i386_got_plt_entry));
4769 bfd_put_32 (output_bfd, got_offset,
4770 plt->contents + plt_offset + plt_got_offset);
4771 }
4772
4773 if (!h->def_regular
4774 && (h->plt.offset != (bfd_vma) -1
4775 || eh->plt_got.offset != (bfd_vma) -1))
4776 {
4777 /* Mark the symbol as undefined, rather than as defined in
4778 the .plt section. Leave the value if there were any
4779 relocations where pointer equality matters (this is a clue
4780 for the dynamic linker, to make function pointer
4781 comparisons work between an application and shared
4782 library), otherwise set it to zero. If a function is only
4783 called from a binary, there is no need to slow down
4784 shared libraries because of that. */
4785 sym->st_shndx = SHN_UNDEF;
4786 if (!h->pointer_equality_needed)
4787 sym->st_value = 0;
4788 }
4789
4790 if (h->got.offset != (bfd_vma) -1
4791 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4792 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4793 {
4794 Elf_Internal_Rela rel;
4795
4796 /* This symbol has an entry in the global offset table. Set it
4797 up. */
4798
4799 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4800 abort ();
4801
4802 rel.r_offset = (htab->elf.sgot->output_section->vma
4803 + htab->elf.sgot->output_offset
4804 + (h->got.offset & ~(bfd_vma) 1));
4805
4806 /* If this is a static link, or it is a -Bsymbolic link and the
4807 symbol is defined locally or was forced to be local because
4808 of a version file, we just want to emit a RELATIVE reloc.
4809 The entry in the global offset table will already have been
4810 initialized in the relocate_section function. */
4811 if (h->def_regular
4812 && h->type == STT_GNU_IFUNC)
4813 {
4814 if (info->shared)
4815 {
4816 /* Generate R_386_GLOB_DAT. */
4817 goto do_glob_dat;
4818 }
4819 else
4820 {
4821 asection *plt;
4822
4823 if (!h->pointer_equality_needed)
4824 abort ();
4825
4826 /* For non-shared object, we can't use .got.plt, which
4827 contains the real function addres if we need pointer
4828 equality. We load the GOT entry with the PLT entry. */
4829 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4830 bfd_put_32 (output_bfd,
4831 (plt->output_section->vma
4832 + plt->output_offset + h->plt.offset),
4833 htab->elf.sgot->contents + h->got.offset);
4834 return TRUE;
4835 }
4836 }
4837 else if (info->shared
4838 && SYMBOL_REFERENCES_LOCAL (info, h))
4839 {
4840 BFD_ASSERT((h->got.offset & 1) != 0);
4841 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4842 }
4843 else
4844 {
4845 BFD_ASSERT((h->got.offset & 1) == 0);
4846 do_glob_dat:
4847 bfd_put_32 (output_bfd, (bfd_vma) 0,
4848 htab->elf.sgot->contents + h->got.offset);
4849 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4850 }
4851
4852 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
4853 }
4854
4855 if (h->needs_copy)
4856 {
4857 Elf_Internal_Rela rel;
4858
4859 /* This symbol needs a copy reloc. Set it up. */
4860
4861 if (h->dynindx == -1
4862 || (h->root.type != bfd_link_hash_defined
4863 && h->root.type != bfd_link_hash_defweak)
4864 || htab->srelbss == NULL)
4865 abort ();
4866
4867 rel.r_offset = (h->root.u.def.value
4868 + h->root.u.def.section->output_section->vma
4869 + h->root.u.def.section->output_offset);
4870 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4871 elf_append_rel (output_bfd, htab->srelbss, &rel);
4872 }
4873
4874 return TRUE;
4875 }
4876
4877 /* Finish up local dynamic symbol handling. We set the contents of
4878 various dynamic sections here. */
4879
4880 static bfd_boolean
4881 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4882 {
4883 struct elf_link_hash_entry *h
4884 = (struct elf_link_hash_entry *) *slot;
4885 struct bfd_link_info *info
4886 = (struct bfd_link_info *) inf;
4887
4888 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4889 h, NULL);
4890 }
4891
4892 /* Used to decide how to sort relocs in an optimal manner for the
4893 dynamic linker, before writing them out. */
4894
4895 static enum elf_reloc_type_class
4896 elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4897 const asection *rel_sec ATTRIBUTE_UNUSED,
4898 const Elf_Internal_Rela *rela)
4899 {
4900 switch (ELF32_R_TYPE (rela->r_info))
4901 {
4902 case R_386_RELATIVE:
4903 return reloc_class_relative;
4904 case R_386_JUMP_SLOT:
4905 return reloc_class_plt;
4906 case R_386_COPY:
4907 return reloc_class_copy;
4908 default:
4909 return reloc_class_normal;
4910 }
4911 }
4912
4913 /* Finish up the dynamic sections. */
4914
4915 static bfd_boolean
4916 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4917 struct bfd_link_info *info)
4918 {
4919 struct elf_i386_link_hash_table *htab;
4920 bfd *dynobj;
4921 asection *sdyn;
4922 const struct elf_i386_backend_data *abed;
4923
4924 htab = elf_i386_hash_table (info);
4925 if (htab == NULL)
4926 return FALSE;
4927
4928 dynobj = htab->elf.dynobj;
4929 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4930 abed = get_elf_i386_backend_data (output_bfd);
4931
4932 if (htab->elf.dynamic_sections_created)
4933 {
4934 Elf32_External_Dyn *dyncon, *dynconend;
4935
4936 if (sdyn == NULL || htab->elf.sgot == NULL)
4937 abort ();
4938
4939 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4940 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4941 for (; dyncon < dynconend; dyncon++)
4942 {
4943 Elf_Internal_Dyn dyn;
4944 asection *s;
4945
4946 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4947
4948 switch (dyn.d_tag)
4949 {
4950 default:
4951 if (abed->is_vxworks
4952 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4953 break;
4954 continue;
4955
4956 case DT_PLTGOT:
4957 s = htab->elf.sgotplt;
4958 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4959 break;
4960
4961 case DT_JMPREL:
4962 s = htab->elf.srelplt;
4963 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4964 break;
4965
4966 case DT_PLTRELSZ:
4967 s = htab->elf.srelplt;
4968 dyn.d_un.d_val = s->size;
4969 break;
4970
4971 case DT_RELSZ:
4972 /* My reading of the SVR4 ABI indicates that the
4973 procedure linkage table relocs (DT_JMPREL) should be
4974 included in the overall relocs (DT_REL). This is
4975 what Solaris does. However, UnixWare can not handle
4976 that case. Therefore, we override the DT_RELSZ entry
4977 here to make it not include the JMPREL relocs. */
4978 s = htab->elf.srelplt;
4979 if (s == NULL)
4980 continue;
4981 dyn.d_un.d_val -= s->size;
4982 break;
4983
4984 case DT_REL:
4985 /* We may not be using the standard ELF linker script.
4986 If .rel.plt is the first .rel section, we adjust
4987 DT_REL to not include it. */
4988 s = htab->elf.srelplt;
4989 if (s == NULL)
4990 continue;
4991 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4992 continue;
4993 dyn.d_un.d_ptr += s->size;
4994 break;
4995 }
4996
4997 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4998 }
4999
5000 /* Fill in the first entry in the procedure linkage table. */
5001 if (htab->elf.splt && htab->elf.splt->size > 0)
5002 {
5003 if (info->shared)
5004 {
5005 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5006 abed->plt->plt0_entry_size);
5007 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5008 abed->plt0_pad_byte,
5009 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5010 }
5011 else
5012 {
5013 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5014 abed->plt->plt0_entry_size);
5015 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5016 abed->plt0_pad_byte,
5017 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5018 bfd_put_32 (output_bfd,
5019 (htab->elf.sgotplt->output_section->vma
5020 + htab->elf.sgotplt->output_offset
5021 + 4),
5022 htab->elf.splt->contents
5023 + abed->plt->plt0_got1_offset);
5024 bfd_put_32 (output_bfd,
5025 (htab->elf.sgotplt->output_section->vma
5026 + htab->elf.sgotplt->output_offset
5027 + 8),
5028 htab->elf.splt->contents
5029 + abed->plt->plt0_got2_offset);
5030
5031 if (abed->is_vxworks)
5032 {
5033 Elf_Internal_Rela rel;
5034
5035 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5036 On IA32 we use REL relocations so the addend goes in
5037 the PLT directly. */
5038 rel.r_offset = (htab->elf.splt->output_section->vma
5039 + htab->elf.splt->output_offset
5040 + abed->plt->plt0_got1_offset);
5041 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5042 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5043 htab->srelplt2->contents);
5044 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5045 rel.r_offset = (htab->elf.splt->output_section->vma
5046 + htab->elf.splt->output_offset
5047 + abed->plt->plt0_got2_offset);
5048 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5049 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5050 htab->srelplt2->contents +
5051 sizeof (Elf32_External_Rel));
5052 }
5053 }
5054
5055 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5056 really seem like the right value. */
5057 elf_section_data (htab->elf.splt->output_section)
5058 ->this_hdr.sh_entsize = 4;
5059
5060 /* Correct the .rel.plt.unloaded relocations. */
5061 if (abed->is_vxworks && !info->shared)
5062 {
5063 int num_plts = (htab->elf.splt->size
5064 / abed->plt->plt_entry_size) - 1;
5065 unsigned char *p;
5066
5067 p = htab->srelplt2->contents;
5068 if (info->shared)
5069 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5070 else
5071 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5072
5073 for (; num_plts; num_plts--)
5074 {
5075 Elf_Internal_Rela rel;
5076 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5077 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5078 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5079 p += sizeof (Elf32_External_Rel);
5080
5081 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5082 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5083 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5084 p += sizeof (Elf32_External_Rel);
5085 }
5086 }
5087 }
5088 }
5089
5090 if (htab->elf.sgotplt)
5091 {
5092 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5093 {
5094 (*_bfd_error_handler)
5095 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5096 return FALSE;
5097 }
5098
5099 /* Fill in the first three entries in the global offset table. */
5100 if (htab->elf.sgotplt->size > 0)
5101 {
5102 bfd_put_32 (output_bfd,
5103 (sdyn == NULL ? 0
5104 : sdyn->output_section->vma + sdyn->output_offset),
5105 htab->elf.sgotplt->contents);
5106 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5107 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5108 }
5109
5110 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5111 }
5112
5113 /* Adjust .eh_frame for .plt section. */
5114 if (htab->plt_eh_frame != NULL
5115 && htab->plt_eh_frame->contents != NULL)
5116 {
5117 if (htab->elf.splt != NULL
5118 && htab->elf.splt->size != 0
5119 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5120 && htab->elf.splt->output_section != NULL
5121 && htab->plt_eh_frame->output_section != NULL)
5122 {
5123 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5124 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5125 + htab->plt_eh_frame->output_offset
5126 + PLT_FDE_START_OFFSET;
5127 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5128 htab->plt_eh_frame->contents
5129 + PLT_FDE_START_OFFSET);
5130 }
5131 if (htab->plt_eh_frame->sec_info_type
5132 == SEC_INFO_TYPE_EH_FRAME)
5133 {
5134 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5135 htab->plt_eh_frame,
5136 htab->plt_eh_frame->contents))
5137 return FALSE;
5138 }
5139 }
5140
5141 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5142 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5143
5144 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5145 htab_traverse (htab->loc_hash_table,
5146 elf_i386_finish_local_dynamic_symbol,
5147 info);
5148
5149 return TRUE;
5150 }
5151
5152 /* Return an array of PLT entry symbol values. */
5153
5154 static bfd_vma *
5155 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5156 asection *relplt)
5157 {
5158 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5159 arelent *p;
5160 long count, i;
5161 bfd_vma *plt_sym_val;
5162 bfd_vma plt_offset;
5163 bfd_byte *plt_contents;
5164 const struct elf_i386_backend_data *bed
5165 = get_elf_i386_backend_data (abfd);
5166 Elf_Internal_Shdr *hdr;
5167
5168 /* Get the .plt section contents. */
5169 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5170 if (plt_contents == NULL)
5171 return NULL;
5172 if (!bfd_get_section_contents (abfd, (asection *) plt,
5173 plt_contents, 0, plt->size))
5174 {
5175 bad_return:
5176 free (plt_contents);
5177 return NULL;
5178 }
5179
5180 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5181 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5182 goto bad_return;
5183
5184 hdr = &elf_section_data (relplt)->this_hdr;
5185 count = relplt->size / hdr->sh_entsize;
5186
5187 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5188 if (plt_sym_val == NULL)
5189 goto bad_return;
5190
5191 for (i = 0; i < count; i++)
5192 plt_sym_val[i] = -1;
5193
5194 plt_offset = bed->plt->plt_entry_size;
5195 p = relplt->relocation;
5196 for (i = 0; i < count; i++, p++)
5197 {
5198 long reloc_index;
5199
5200 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5201 if (p->howto == NULL)
5202 continue;
5203
5204 if (p->howto->type != R_386_JUMP_SLOT
5205 && p->howto->type != R_386_IRELATIVE)
5206 continue;
5207
5208 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5209 + bed->plt->plt_reloc_offset));
5210 reloc_index /= sizeof (Elf32_External_Rel);
5211 if (reloc_index >= count)
5212 abort ();
5213 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5214 plt_offset += bed->plt->plt_entry_size;
5215 }
5216
5217 free (plt_contents);
5218
5219 return plt_sym_val;
5220 }
5221
5222 /* Similar to _bfd_elf_get_synthetic_symtab. */
5223
5224 static long
5225 elf_i386_get_synthetic_symtab (bfd *abfd,
5226 long symcount,
5227 asymbol **syms,
5228 long dynsymcount,
5229 asymbol **dynsyms,
5230 asymbol **ret)
5231 {
5232 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5233 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5234 dynsymcount, dynsyms, ret,
5235 plt,
5236 elf_i386_get_plt_sym_val);
5237 }
5238
5239 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5240
5241 static bfd_boolean
5242 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5243 {
5244 if (h->plt.offset != (bfd_vma) -1
5245 && !h->def_regular
5246 && !h->pointer_equality_needed)
5247 return FALSE;
5248
5249 return _bfd_elf_hash_symbol (h);
5250 }
5251
5252 /* Hook called by the linker routine which adds symbols from an object
5253 file. */
5254
5255 static bfd_boolean
5256 elf_i386_add_symbol_hook (bfd * abfd,
5257 struct bfd_link_info * info,
5258 Elf_Internal_Sym * sym,
5259 const char ** namep ATTRIBUTE_UNUSED,
5260 flagword * flagsp ATTRIBUTE_UNUSED,
5261 asection ** secp ATTRIBUTE_UNUSED,
5262 bfd_vma * valp ATTRIBUTE_UNUSED)
5263 {
5264 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5265 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
5266 && (abfd->flags & DYNAMIC) == 0
5267 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
5268 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
5269
5270 return TRUE;
5271 }
5272
5273 #define TARGET_LITTLE_SYM i386_elf32_vec
5274 #define TARGET_LITTLE_NAME "elf32-i386"
5275 #define ELF_ARCH bfd_arch_i386
5276 #define ELF_TARGET_ID I386_ELF_DATA
5277 #define ELF_MACHINE_CODE EM_386
5278 #define ELF_MAXPAGESIZE 0x1000
5279
5280 #define elf_backend_can_gc_sections 1
5281 #define elf_backend_can_refcount 1
5282 #define elf_backend_want_got_plt 1
5283 #define elf_backend_plt_readonly 1
5284 #define elf_backend_want_plt_sym 0
5285 #define elf_backend_got_header_size 12
5286 #define elf_backend_plt_alignment 4
5287
5288 /* Support RELA for objdump of prelink objects. */
5289 #define elf_info_to_howto elf_i386_info_to_howto_rel
5290 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5291
5292 #define bfd_elf32_mkobject elf_i386_mkobject
5293
5294 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5295 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5296 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5297 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5298 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5299
5300 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5301 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5302 #define elf_backend_check_relocs elf_i386_check_relocs
5303 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5304 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5305 #define elf_backend_fake_sections elf_i386_fake_sections
5306 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5307 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5308 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5309 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5310 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5311 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5312 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5313 #define elf_backend_relocate_section elf_i386_relocate_section
5314 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5315 #define elf_backend_always_size_sections elf_i386_always_size_sections
5316 #define elf_backend_omit_section_dynsym \
5317 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5318 #define elf_backend_hash_symbol elf_i386_hash_symbol
5319 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5320
5321 #include "elf32-target.h"
5322
5323 /* FreeBSD support. */
5324
5325 #undef TARGET_LITTLE_SYM
5326 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5327 #undef TARGET_LITTLE_NAME
5328 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5329 #undef ELF_OSABI
5330 #define ELF_OSABI ELFOSABI_FREEBSD
5331
5332 /* The kernel recognizes executables as valid only if they carry a
5333 "FreeBSD" label in the ELF header. So we put this label on all
5334 executables and (for simplicity) also all other object files. */
5335
5336 static void
5337 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5338 {
5339 _bfd_elf_post_process_headers (abfd, info);
5340
5341 #ifdef OLD_FREEBSD_ABI_LABEL
5342 {
5343 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5344 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5345 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5346 }
5347 #endif
5348 }
5349
5350 #undef elf_backend_post_process_headers
5351 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5352 #undef elf32_bed
5353 #define elf32_bed elf32_i386_fbsd_bed
5354
5355 #undef elf_backend_add_symbol_hook
5356
5357 #include "elf32-target.h"
5358
5359 /* Solaris 2. */
5360
5361 #undef TARGET_LITTLE_SYM
5362 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5363 #undef TARGET_LITTLE_NAME
5364 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5365
5366 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5367 objects won't be recognized. */
5368 #undef ELF_OSABI
5369
5370 #undef elf32_bed
5371 #define elf32_bed elf32_i386_sol2_bed
5372
5373 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5374 boundary. */
5375 #undef elf_backend_static_tls_alignment
5376 #define elf_backend_static_tls_alignment 8
5377
5378 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5379
5380 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5381 File, p.63. */
5382 #undef elf_backend_want_plt_sym
5383 #define elf_backend_want_plt_sym 1
5384
5385 #include "elf32-target.h"
5386
5387 /* Native Client support. */
5388
5389 #undef TARGET_LITTLE_SYM
5390 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5391 #undef TARGET_LITTLE_NAME
5392 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5393 #undef elf32_bed
5394 #define elf32_bed elf32_i386_nacl_bed
5395
5396 #undef ELF_MAXPAGESIZE
5397 #define ELF_MAXPAGESIZE 0x10000
5398
5399 /* Restore defaults. */
5400 #undef ELF_OSABI
5401 #undef elf_backend_want_plt_sym
5402 #define elf_backend_want_plt_sym 0
5403 #undef elf_backend_post_process_headers
5404 #undef elf_backend_static_tls_alignment
5405
5406 /* NaCl uses substantially different PLT entries for the same effects. */
5407
5408 #undef elf_backend_plt_alignment
5409 #define elf_backend_plt_alignment 5
5410 #define NACL_PLT_ENTRY_SIZE 64
5411 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5412
5413 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5414 {
5415 0xff, 0x35, /* pushl contents of address */
5416 0, 0, 0, 0, /* replaced with address of .got + 4. */
5417 0x8b, 0x0d, /* movl contents of address, %ecx */
5418 0, 0, 0, 0, /* replaced with address of .got + 8. */
5419 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5420 0xff, 0xe1 /* jmp *%ecx */
5421 };
5422
5423 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5424 {
5425 0x8b, 0x0d, /* movl contents of address, %ecx */
5426 0, 0, 0, 0, /* replaced with GOT slot address. */
5427 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5428 0xff, 0xe1, /* jmp *%ecx */
5429
5430 /* Pad to the next 32-byte boundary with nop instructions. */
5431 0x90,
5432 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5433 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5434
5435 /* Lazy GOT entries point here (32-byte aligned). */
5436 0x68, /* pushl immediate */
5437 0, 0, 0, 0, /* replaced with reloc offset. */
5438 0xe9, /* jmp relative */
5439 0, 0, 0, 0, /* replaced with offset to .plt. */
5440
5441 /* Pad to the next 32-byte boundary with nop instructions. */
5442 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5443 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5444 0x90, 0x90
5445 };
5446
5447 static const bfd_byte
5448 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5449 {
5450 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5451 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5452 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5453 0xff, 0xe1, /* jmp *%ecx */
5454
5455 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5456 so pad to that size with nop instructions. */
5457 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5458 };
5459
5460 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5461 {
5462 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5463 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5464 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5465 0xff, 0xe1, /* jmp *%ecx */
5466
5467 /* Pad to the next 32-byte boundary with nop instructions. */
5468 0x90,
5469 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5470 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5471
5472 /* Lazy GOT entries point here (32-byte aligned). */
5473 0x68, /* pushl immediate */
5474 0, 0, 0, 0, /* replaced with offset into relocation table. */
5475 0xe9, /* jmp relative */
5476 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5477
5478 /* Pad to the next 32-byte boundary with nop instructions. */
5479 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5480 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5481 0x90, 0x90
5482 };
5483
5484 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5485 {
5486 #if (PLT_CIE_LENGTH != 20 \
5487 || PLT_FDE_LENGTH != 36 \
5488 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5489 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5490 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5491 #endif
5492 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5493 0, 0, 0, 0, /* CIE ID */
5494 1, /* CIE version */
5495 'z', 'R', 0, /* Augmentation string */
5496 1, /* Code alignment factor */
5497 0x7c, /* Data alignment factor: -4 */
5498 8, /* Return address column */
5499 1, /* Augmentation size */
5500 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5501 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5502 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5503 DW_CFA_nop, DW_CFA_nop,
5504
5505 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5506 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5507 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5508 0, 0, 0, 0, /* .plt size goes here */
5509 0, /* Augmentation size */
5510 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5511 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5512 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5513 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5514 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5515 13, /* Block length */
5516 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5517 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5518 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5519 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5520 DW_CFA_nop, DW_CFA_nop
5521 };
5522
5523 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5524 {
5525 elf_i386_nacl_plt0_entry, /* plt0_entry */
5526 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5527 2, /* plt0_got1_offset */
5528 8, /* plt0_got2_offset */
5529 elf_i386_nacl_plt_entry, /* plt_entry */
5530 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5531 2, /* plt_got_offset */
5532 33, /* plt_reloc_offset */
5533 38, /* plt_plt_offset */
5534 32, /* plt_lazy_offset */
5535 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5536 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5537 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5538 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5539 };
5540
5541 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5542 {
5543 &elf_i386_nacl_plt, /* plt */
5544 0x90, /* plt0_pad_byte: nop insn */
5545 0, /* is_vxworks */
5546 };
5547
5548 static bfd_boolean
5549 elf32_i386_nacl_elf_object_p (bfd *abfd)
5550 {
5551 /* Set the right machine number for a NaCl i386 ELF32 file. */
5552 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5553 return TRUE;
5554 }
5555
5556 #undef elf_backend_arch_data
5557 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5558
5559 #undef elf_backend_object_p
5560 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5561 #undef elf_backend_modify_segment_map
5562 #define elf_backend_modify_segment_map nacl_modify_segment_map
5563 #undef elf_backend_modify_program_headers
5564 #define elf_backend_modify_program_headers nacl_modify_program_headers
5565 #undef elf_backend_final_write_processing
5566 #define elf_backend_final_write_processing nacl_final_write_processing
5567
5568 #include "elf32-target.h"
5569
5570 /* Restore defaults. */
5571 #undef elf_backend_object_p
5572 #undef elf_backend_modify_segment_map
5573 #undef elf_backend_modify_program_headers
5574 #undef elf_backend_final_write_processing
5575
5576 /* VxWorks support. */
5577
5578 #undef TARGET_LITTLE_SYM
5579 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5580 #undef TARGET_LITTLE_NAME
5581 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5582 #undef ELF_OSABI
5583 #undef elf_backend_plt_alignment
5584 #define elf_backend_plt_alignment 4
5585
5586 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5587 {
5588 &elf_i386_plt, /* plt */
5589 0x90, /* plt0_pad_byte */
5590 1, /* is_vxworks */
5591 };
5592
5593 #undef elf_backend_arch_data
5594 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5595
5596 #undef elf_backend_relocs_compatible
5597 #undef elf_backend_add_symbol_hook
5598 #define elf_backend_add_symbol_hook \
5599 elf_vxworks_add_symbol_hook
5600 #undef elf_backend_link_output_symbol_hook
5601 #define elf_backend_link_output_symbol_hook \
5602 elf_vxworks_link_output_symbol_hook
5603 #undef elf_backend_emit_relocs
5604 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5605 #undef elf_backend_final_write_processing
5606 #define elf_backend_final_write_processing \
5607 elf_vxworks_final_write_processing
5608 #undef elf_backend_static_tls_alignment
5609
5610 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5611 define it. */
5612 #undef elf_backend_want_plt_sym
5613 #define elf_backend_want_plt_sym 1
5614
5615 #undef elf32_bed
5616 #define elf32_bed elf32_i386_vxworks_bed
5617
5618 #include "elf32-target.h"
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