5c35d6509d1e9c3aa63d901b40b9528b9fa15dd1
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2014 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, 0, 0, FALSE, 0, complain_overflow_bitfield,
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 BFD_ASSERT (elf_howto_table [indx].type == r_type);
383 return &elf_howto_table[indx];
384 }
385
386 static void
387 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
388 arelent *cache_ptr,
389 Elf_Internal_Rela *dst)
390 {
391 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
392 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
393 }
394
395 /* Return whether a symbol name implies a local label. The UnixWare
396 2.1 cc generates temporary symbols that start with .X, so we
397 recognize them here. FIXME: do other SVR4 compilers also use .X?.
398 If so, we should move the .X recognition into
399 _bfd_elf_is_local_label_name. */
400
401 static bfd_boolean
402 elf_i386_is_local_label_name (bfd *abfd, const char *name)
403 {
404 if (name[0] == '.' && name[1] == 'X')
405 return TRUE;
406
407 return _bfd_elf_is_local_label_name (abfd, name);
408 }
409 \f
410 /* Support for core dump NOTE sections. */
411
412 static bfd_boolean
413 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
414 {
415 int offset;
416 size_t size;
417
418 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
419 {
420 int pr_version = bfd_get_32 (abfd, note->descdata);
421
422 if (pr_version != 1)
423 return FALSE;
424
425 /* pr_cursig */
426 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
427
428 /* pr_pid */
429 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
430
431 /* pr_reg */
432 offset = 28;
433 size = bfd_get_32 (abfd, note->descdata + 8);
434 }
435 else
436 {
437 switch (note->descsz)
438 {
439 default:
440 return FALSE;
441
442 case 144: /* Linux/i386 */
443 /* pr_cursig */
444 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
445
446 /* pr_pid */
447 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
448
449 /* pr_reg */
450 offset = 72;
451 size = 68;
452
453 break;
454 }
455 }
456
457 /* Make a ".reg/999" section. */
458 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
459 size, note->descpos + offset);
460 }
461
462 static bfd_boolean
463 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
464 {
465 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
466 {
467 int pr_version = bfd_get_32 (abfd, note->descdata);
468
469 if (pr_version != 1)
470 return FALSE;
471
472 elf_tdata (abfd)->core->program
473 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
474 elf_tdata (abfd)->core->command
475 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
476 }
477 else
478 {
479 switch (note->descsz)
480 {
481 default:
482 return FALSE;
483
484 case 124: /* Linux/i386 elf_prpsinfo. */
485 elf_tdata (abfd)->core->pid
486 = bfd_get_32 (abfd, note->descdata + 12);
487 elf_tdata (abfd)->core->program
488 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
489 elf_tdata (abfd)->core->command
490 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
491 }
492 }
493
494 /* Note that for some reason, a spurious space is tacked
495 onto the end of the args in some (at least one anyway)
496 implementations, so strip it off if it exists. */
497 {
498 char *command = elf_tdata (abfd)->core->command;
499 int n = strlen (command);
500
501 if (0 < n && command[n - 1] == ' ')
502 command[n - 1] = '\0';
503 }
504
505 return TRUE;
506 }
507 \f
508 /* Functions for the i386 ELF linker.
509
510 In order to gain some understanding of code in this file without
511 knowing all the intricate details of the linker, note the
512 following:
513
514 Functions named elf_i386_* are called by external routines, other
515 functions are only called locally. elf_i386_* functions appear
516 in this file more or less in the order in which they are called
517 from external routines. eg. elf_i386_check_relocs is called
518 early in the link process, elf_i386_finish_dynamic_sections is
519 one of the last functions. */
520
521
522 /* The name of the dynamic interpreter. This is put in the .interp
523 section. */
524
525 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
526
527 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
530 shared lib. */
531 #define ELIMINATE_COPY_RELOCS 1
532
533 /* The size in bytes of an entry in the procedure linkage table. */
534
535 #define PLT_ENTRY_SIZE 16
536
537 /* The first entry in an absolute procedure linkage table looks like
538 this. See the SVR4 ABI i386 supplement to see how this works.
539 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
540
541 static const bfd_byte elf_i386_plt0_entry[12] =
542 {
543 0xff, 0x35, /* pushl contents of address */
544 0, 0, 0, 0, /* replaced with address of .got + 4. */
545 0xff, 0x25, /* jmp indirect */
546 0, 0, 0, 0 /* replaced with address of .got + 8. */
547 };
548
549 /* Subsequent entries in an absolute procedure linkage table look like
550 this. */
551
552 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
553 {
554 0xff, 0x25, /* jmp indirect */
555 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
556 0x68, /* pushl immediate */
557 0, 0, 0, 0, /* replaced with offset into relocation table. */
558 0xe9, /* jmp relative */
559 0, 0, 0, 0 /* replaced with offset to start of .plt. */
560 };
561
562 /* The first entry in a PIC procedure linkage table look like this.
563 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
564
565 static const bfd_byte elf_i386_pic_plt0_entry[12] =
566 {
567 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
568 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
569 };
570
571 /* Subsequent entries in a PIC procedure linkage table look like this. */
572
573 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
574 {
575 0xff, 0xa3, /* jmp *offset(%ebx) */
576 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
577 0x68, /* pushl immediate */
578 0, 0, 0, 0, /* replaced with offset into relocation table. */
579 0xe9, /* jmp relative */
580 0, 0, 0, 0 /* replaced with offset to start of .plt. */
581 };
582
583 /* Entries in the GOT procedure linkage table look like this. */
584
585 static const bfd_byte elf_i386_got_plt_entry[8] =
586 {
587 0xff, 0x25, /* jmp indirect */
588 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
589 0x66, 0x90 /* xchg %ax,%ax */
590 };
591
592 /* Entries in the PIC GOT procedure linkage table look like this. */
593
594 static const bfd_byte elf_i386_pic_got_plt_entry[8] =
595 {
596 0xff, 0xa3, /* jmp *offset(%ebx) */
597 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
598 0x66, 0x90 /* xchg %ax,%ax */
599 };
600
601 /* .eh_frame covering the .plt section. */
602
603 static const bfd_byte elf_i386_eh_frame_plt[] =
604 {
605 #define PLT_CIE_LENGTH 20
606 #define PLT_FDE_LENGTH 36
607 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
608 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
609 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
610 0, 0, 0, 0, /* CIE ID */
611 1, /* CIE version */
612 'z', 'R', 0, /* Augmentation string */
613 1, /* Code alignment factor */
614 0x7c, /* Data alignment factor */
615 8, /* Return address column */
616 1, /* Augmentation size */
617 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
618 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
619 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
620 DW_CFA_nop, DW_CFA_nop,
621
622 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
623 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
624 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
625 0, 0, 0, 0, /* .plt size goes here */
626 0, /* Augmentation size */
627 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
628 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
629 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
630 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
631 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
632 11, /* Block length */
633 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
634 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
635 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
636 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
637 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
638 };
639
640 struct elf_i386_plt_layout
641 {
642 /* The first entry in an absolute procedure linkage table looks like this. */
643 const bfd_byte *plt0_entry;
644 unsigned int plt0_entry_size;
645
646 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
647 unsigned int plt0_got1_offset;
648 unsigned int plt0_got2_offset;
649
650 /* Later entries in an absolute procedure linkage table look like this. */
651 const bfd_byte *plt_entry;
652 unsigned int plt_entry_size;
653
654 /* Offsets into plt_entry that are to be replaced with... */
655 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
656 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
657 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
658
659 /* Offset into plt_entry where the initial value of the GOT entry points. */
660 unsigned int plt_lazy_offset;
661
662 /* The first entry in a PIC procedure linkage table looks like this. */
663 const bfd_byte *pic_plt0_entry;
664
665 /* Subsequent entries in a PIC procedure linkage table look like this. */
666 const bfd_byte *pic_plt_entry;
667
668 /* .eh_frame covering the .plt section. */
669 const bfd_byte *eh_frame_plt;
670 unsigned int eh_frame_plt_size;
671 };
672
673 #define GET_PLT_ENTRY_SIZE(abfd) \
674 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
675
676 /* These are the standard parameters. */
677 static const struct elf_i386_plt_layout elf_i386_plt =
678 {
679 elf_i386_plt0_entry, /* plt0_entry */
680 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
681 2, /* plt0_got1_offset */
682 8, /* plt0_got2_offset */
683 elf_i386_plt_entry, /* plt_entry */
684 PLT_ENTRY_SIZE, /* plt_entry_size */
685 2, /* plt_got_offset */
686 7, /* plt_reloc_offset */
687 12, /* plt_plt_offset */
688 6, /* plt_lazy_offset */
689 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
690 elf_i386_pic_plt_entry, /* pic_plt_entry */
691 elf_i386_eh_frame_plt, /* eh_frame_plt */
692 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
693 };
694 \f
695
696 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
697 for the PLTResolve stub and then for each PLT entry. */
698 #define PLTRESOLVE_RELOCS_SHLIB 0
699 #define PLTRESOLVE_RELOCS 2
700 #define PLT_NON_JUMP_SLOT_RELOCS 2
701
702 /* Architecture-specific backend data for i386. */
703
704 struct elf_i386_backend_data
705 {
706 /* Parameters describing PLT generation. */
707 const struct elf_i386_plt_layout *plt;
708
709 /* Value used to fill the unused bytes of the first PLT entry. */
710 bfd_byte plt0_pad_byte;
711
712 /* True if the target system is VxWorks. */
713 int is_vxworks;
714 };
715
716 #define get_elf_i386_backend_data(abfd) \
717 ((const struct elf_i386_backend_data *) \
718 get_elf_backend_data (abfd)->arch_data)
719
720 /* These are the standard parameters. */
721 static const struct elf_i386_backend_data elf_i386_arch_bed =
722 {
723 &elf_i386_plt, /* plt */
724 0, /* plt0_pad_byte */
725 0, /* is_vxworks */
726 };
727
728 #define elf_backend_arch_data &elf_i386_arch_bed
729
730 /* i386 ELF linker hash entry. */
731
732 struct elf_i386_link_hash_entry
733 {
734 struct elf_link_hash_entry elf;
735
736 /* Track dynamic relocs copied for this symbol. */
737 struct elf_dyn_relocs *dyn_relocs;
738
739 #define GOT_UNKNOWN 0
740 #define GOT_NORMAL 1
741 #define GOT_TLS_GD 2
742 #define GOT_TLS_IE 4
743 #define GOT_TLS_IE_POS 5
744 #define GOT_TLS_IE_NEG 6
745 #define GOT_TLS_IE_BOTH 7
746 #define GOT_TLS_GDESC 8
747 #define GOT_TLS_GD_BOTH_P(type) \
748 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
749 #define GOT_TLS_GD_P(type) \
750 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
751 #define GOT_TLS_GDESC_P(type) \
752 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
753 #define GOT_TLS_GD_ANY_P(type) \
754 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
755 unsigned char tls_type;
756
757 /* Information about the GOT PLT entry. Filled when there are both
758 GOT and PLT relocations against the same function. */
759 union gotplt_union plt_got;
760
761 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
762 starting at the end of the jump table. */
763 bfd_vma tlsdesc_got;
764 };
765
766 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
767
768 struct elf_i386_obj_tdata
769 {
770 struct elf_obj_tdata root;
771
772 /* tls_type for each local got entry. */
773 char *local_got_tls_type;
774
775 /* GOTPLT entries for TLS descriptors. */
776 bfd_vma *local_tlsdesc_gotent;
777 };
778
779 #define elf_i386_tdata(abfd) \
780 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
781
782 #define elf_i386_local_got_tls_type(abfd) \
783 (elf_i386_tdata (abfd)->local_got_tls_type)
784
785 #define elf_i386_local_tlsdesc_gotent(abfd) \
786 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
787
788 #define is_i386_elf(bfd) \
789 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
790 && elf_tdata (bfd) != NULL \
791 && elf_object_id (bfd) == I386_ELF_DATA)
792
793 static bfd_boolean
794 elf_i386_mkobject (bfd *abfd)
795 {
796 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
797 I386_ELF_DATA);
798 }
799
800 /* i386 ELF linker hash table. */
801
802 struct elf_i386_link_hash_table
803 {
804 struct elf_link_hash_table elf;
805
806 /* Short-cuts to get to dynamic linker sections. */
807 asection *sdynbss;
808 asection *srelbss;
809 asection *plt_eh_frame;
810 asection *plt_got;
811
812 union
813 {
814 bfd_signed_vma refcount;
815 bfd_vma offset;
816 } tls_ldm_got;
817
818 /* The amount of space used by the reserved portion of the sgotplt
819 section, plus whatever space is used by the jump slots. */
820 bfd_vma sgotplt_jump_table_size;
821
822 /* Small local sym cache. */
823 struct sym_cache sym_cache;
824
825 /* _TLS_MODULE_BASE_ symbol. */
826 struct bfd_link_hash_entry *tls_module_base;
827
828 /* Used by local STT_GNU_IFUNC symbols. */
829 htab_t loc_hash_table;
830 void * loc_hash_memory;
831
832 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
833 asection *srelplt2;
834
835 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
836 bfd_vma next_tls_desc_index;
837
838 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
839 bfd_vma next_jump_slot_index;
840
841 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
842 bfd_vma next_irelative_index;
843 };
844
845 /* Get the i386 ELF linker hash table from a link_info structure. */
846
847 #define elf_i386_hash_table(p) \
848 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
849 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
850
851 #define elf_i386_compute_jump_table_size(htab) \
852 ((htab)->elf.srelplt->reloc_count * 4)
853
854 /* Create an entry in an i386 ELF linker hash table. */
855
856 static struct bfd_hash_entry *
857 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
858 struct bfd_hash_table *table,
859 const char *string)
860 {
861 /* Allocate the structure if it has not already been allocated by a
862 subclass. */
863 if (entry == NULL)
864 {
865 entry = (struct bfd_hash_entry *)
866 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
867 if (entry == NULL)
868 return entry;
869 }
870
871 /* Call the allocation method of the superclass. */
872 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
873 if (entry != NULL)
874 {
875 struct elf_i386_link_hash_entry *eh;
876
877 eh = (struct elf_i386_link_hash_entry *) entry;
878 eh->dyn_relocs = NULL;
879 eh->tls_type = GOT_UNKNOWN;
880 eh->plt_got.offset = (bfd_vma) -1;
881 eh->tlsdesc_got = (bfd_vma) -1;
882 }
883
884 return entry;
885 }
886
887 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
888 for local symbol so that we can handle local STT_GNU_IFUNC symbols
889 as global symbol. We reuse indx and dynstr_index for local symbol
890 hash since they aren't used by global symbols in this backend. */
891
892 static hashval_t
893 elf_i386_local_htab_hash (const void *ptr)
894 {
895 struct elf_link_hash_entry *h
896 = (struct elf_link_hash_entry *) ptr;
897 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
898 }
899
900 /* Compare local hash entries. */
901
902 static int
903 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
904 {
905 struct elf_link_hash_entry *h1
906 = (struct elf_link_hash_entry *) ptr1;
907 struct elf_link_hash_entry *h2
908 = (struct elf_link_hash_entry *) ptr2;
909
910 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
911 }
912
913 /* Find and/or create a hash entry for local symbol. */
914
915 static struct elf_link_hash_entry *
916 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
917 bfd *abfd, const Elf_Internal_Rela *rel,
918 bfd_boolean create)
919 {
920 struct elf_i386_link_hash_entry e, *ret;
921 asection *sec = abfd->sections;
922 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
923 ELF32_R_SYM (rel->r_info));
924 void **slot;
925
926 e.elf.indx = sec->id;
927 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
928 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
929 create ? INSERT : NO_INSERT);
930
931 if (!slot)
932 return NULL;
933
934 if (*slot)
935 {
936 ret = (struct elf_i386_link_hash_entry *) *slot;
937 return &ret->elf;
938 }
939
940 ret = (struct elf_i386_link_hash_entry *)
941 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
942 sizeof (struct elf_i386_link_hash_entry));
943 if (ret)
944 {
945 memset (ret, 0, sizeof (*ret));
946 ret->elf.indx = sec->id;
947 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
948 ret->elf.dynindx = -1;
949 ret->plt_got.offset = (bfd_vma) -1;
950 *slot = ret;
951 }
952 return &ret->elf;
953 }
954
955 /* Destroy an i386 ELF linker hash table. */
956
957 static void
958 elf_i386_link_hash_table_free (bfd *obfd)
959 {
960 struct elf_i386_link_hash_table *htab
961 = (struct elf_i386_link_hash_table *) obfd->link.hash;
962
963 if (htab->loc_hash_table)
964 htab_delete (htab->loc_hash_table);
965 if (htab->loc_hash_memory)
966 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
967 _bfd_elf_link_hash_table_free (obfd);
968 }
969
970 /* Create an i386 ELF linker hash table. */
971
972 static struct bfd_link_hash_table *
973 elf_i386_link_hash_table_create (bfd *abfd)
974 {
975 struct elf_i386_link_hash_table *ret;
976 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
977
978 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
979 if (ret == NULL)
980 return NULL;
981
982 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
983 elf_i386_link_hash_newfunc,
984 sizeof (struct elf_i386_link_hash_entry),
985 I386_ELF_DATA))
986 {
987 free (ret);
988 return NULL;
989 }
990
991 ret->loc_hash_table = htab_try_create (1024,
992 elf_i386_local_htab_hash,
993 elf_i386_local_htab_eq,
994 NULL);
995 ret->loc_hash_memory = objalloc_create ();
996 if (!ret->loc_hash_table || !ret->loc_hash_memory)
997 {
998 elf_i386_link_hash_table_free (abfd);
999 return NULL;
1000 }
1001 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1002
1003 return &ret->elf.root;
1004 }
1005
1006 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1007 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1008 hash table. */
1009
1010 static bfd_boolean
1011 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1012 {
1013 struct elf_i386_link_hash_table *htab;
1014
1015 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1016 return FALSE;
1017
1018 htab = elf_i386_hash_table (info);
1019 if (htab == NULL)
1020 return FALSE;
1021
1022 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1023 if (!info->shared)
1024 htab->srelbss = bfd_get_linker_section (dynobj, ".rel.bss");
1025
1026 if (!htab->sdynbss
1027 || (!info->shared && !htab->srelbss))
1028 abort ();
1029
1030 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1031 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1032 &htab->srelplt2))
1033 return FALSE;
1034
1035 if (!info->no_ld_generated_unwind_info
1036 && htab->plt_eh_frame == NULL
1037 && htab->elf.splt != NULL)
1038 {
1039 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1040 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1041 | SEC_LINKER_CREATED);
1042 htab->plt_eh_frame
1043 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1044 if (htab->plt_eh_frame == NULL
1045 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1046 return FALSE;
1047 }
1048
1049 return TRUE;
1050 }
1051
1052 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1053
1054 static void
1055 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1056 struct elf_link_hash_entry *dir,
1057 struct elf_link_hash_entry *ind)
1058 {
1059 struct elf_i386_link_hash_entry *edir, *eind;
1060
1061 edir = (struct elf_i386_link_hash_entry *) dir;
1062 eind = (struct elf_i386_link_hash_entry *) ind;
1063
1064 if (eind->dyn_relocs != NULL)
1065 {
1066 if (edir->dyn_relocs != NULL)
1067 {
1068 struct elf_dyn_relocs **pp;
1069 struct elf_dyn_relocs *p;
1070
1071 /* Add reloc counts against the indirect sym to the direct sym
1072 list. Merge any entries against the same section. */
1073 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1074 {
1075 struct elf_dyn_relocs *q;
1076
1077 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1078 if (q->sec == p->sec)
1079 {
1080 q->pc_count += p->pc_count;
1081 q->count += p->count;
1082 *pp = p->next;
1083 break;
1084 }
1085 if (q == NULL)
1086 pp = &p->next;
1087 }
1088 *pp = edir->dyn_relocs;
1089 }
1090
1091 edir->dyn_relocs = eind->dyn_relocs;
1092 eind->dyn_relocs = NULL;
1093 }
1094
1095 if (ind->root.type == bfd_link_hash_indirect
1096 && dir->got.refcount <= 0)
1097 {
1098 edir->tls_type = eind->tls_type;
1099 eind->tls_type = GOT_UNKNOWN;
1100 }
1101
1102 if (ELIMINATE_COPY_RELOCS
1103 && ind->root.type != bfd_link_hash_indirect
1104 && dir->dynamic_adjusted)
1105 {
1106 /* If called to transfer flags for a weakdef during processing
1107 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1108 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1109 dir->ref_dynamic |= ind->ref_dynamic;
1110 dir->ref_regular |= ind->ref_regular;
1111 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1112 dir->needs_plt |= ind->needs_plt;
1113 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1114 }
1115 else
1116 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1117 }
1118
1119 /* Return TRUE if the TLS access code sequence support transition
1120 from R_TYPE. */
1121
1122 static bfd_boolean
1123 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1124 bfd_byte *contents,
1125 Elf_Internal_Shdr *symtab_hdr,
1126 struct elf_link_hash_entry **sym_hashes,
1127 unsigned int r_type,
1128 const Elf_Internal_Rela *rel,
1129 const Elf_Internal_Rela *relend)
1130 {
1131 unsigned int val, type;
1132 unsigned long r_symndx;
1133 struct elf_link_hash_entry *h;
1134 bfd_vma offset;
1135
1136 /* Get the section contents. */
1137 if (contents == NULL)
1138 {
1139 if (elf_section_data (sec)->this_hdr.contents != NULL)
1140 contents = elf_section_data (sec)->this_hdr.contents;
1141 else
1142 {
1143 /* FIXME: How to better handle error condition? */
1144 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1145 return FALSE;
1146
1147 /* Cache the section contents for elf_link_input_bfd. */
1148 elf_section_data (sec)->this_hdr.contents = contents;
1149 }
1150 }
1151
1152 offset = rel->r_offset;
1153 switch (r_type)
1154 {
1155 case R_386_TLS_GD:
1156 case R_386_TLS_LDM:
1157 if (offset < 2 || (rel + 1) >= relend)
1158 return FALSE;
1159
1160 type = bfd_get_8 (abfd, contents + offset - 2);
1161 if (r_type == R_386_TLS_GD)
1162 {
1163 /* Check transition from GD access model. Only
1164 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1165 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1166 can transit to different access model. */
1167 if ((offset + 10) > sec->size ||
1168 (type != 0x8d && type != 0x04))
1169 return FALSE;
1170
1171 val = bfd_get_8 (abfd, contents + offset - 1);
1172 if (type == 0x04)
1173 {
1174 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1175 if (offset < 3)
1176 return FALSE;
1177
1178 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1179 return FALSE;
1180
1181 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1182 return FALSE;
1183 }
1184 else
1185 {
1186 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1187 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1188 return FALSE;
1189
1190 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1191 return FALSE;
1192 }
1193 }
1194 else
1195 {
1196 /* Check transition from LD access model. Only
1197 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1198 can transit to different access model. */
1199 if (type != 0x8d || (offset + 9) > sec->size)
1200 return FALSE;
1201
1202 val = bfd_get_8 (abfd, contents + offset - 1);
1203 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1204 return FALSE;
1205 }
1206
1207 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1208 return FALSE;
1209
1210 r_symndx = ELF32_R_SYM (rel[1].r_info);
1211 if (r_symndx < symtab_hdr->sh_info)
1212 return FALSE;
1213
1214 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1215 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1216 may be versioned. */
1217 return (h != NULL
1218 && h->root.root.string != NULL
1219 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1220 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1221 && (strncmp (h->root.root.string, "___tls_get_addr",
1222 15) == 0));
1223
1224 case R_386_TLS_IE:
1225 /* Check transition from IE access model:
1226 movl foo@indntpoff(%rip), %eax
1227 movl foo@indntpoff(%rip), %reg
1228 addl foo@indntpoff(%rip), %reg
1229 */
1230
1231 if (offset < 1 || (offset + 4) > sec->size)
1232 return FALSE;
1233
1234 /* Check "movl foo@tpoff(%rip), %eax" first. */
1235 val = bfd_get_8 (abfd, contents + offset - 1);
1236 if (val == 0xa1)
1237 return TRUE;
1238
1239 if (offset < 2)
1240 return FALSE;
1241
1242 /* Check movl|addl foo@tpoff(%rip), %reg. */
1243 type = bfd_get_8 (abfd, contents + offset - 2);
1244 return ((type == 0x8b || type == 0x03)
1245 && (val & 0xc7) == 0x05);
1246
1247 case R_386_TLS_GOTIE:
1248 case R_386_TLS_IE_32:
1249 /* Check transition from {IE_32,GOTIE} access model:
1250 subl foo@{tpoff,gontoff}(%reg1), %reg2
1251 movl foo@{tpoff,gontoff}(%reg1), %reg2
1252 addl foo@{tpoff,gontoff}(%reg1), %reg2
1253 */
1254
1255 if (offset < 2 || (offset + 4) > sec->size)
1256 return FALSE;
1257
1258 val = bfd_get_8 (abfd, contents + offset - 1);
1259 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1260 return FALSE;
1261
1262 type = bfd_get_8 (abfd, contents + offset - 2);
1263 return type == 0x8b || type == 0x2b || type == 0x03;
1264
1265 case R_386_TLS_GOTDESC:
1266 /* Check transition from GDesc access model:
1267 leal x@tlsdesc(%ebx), %eax
1268
1269 Make sure it's a leal adding ebx to a 32-bit offset
1270 into any register, although it's probably almost always
1271 going to be eax. */
1272
1273 if (offset < 2 || (offset + 4) > sec->size)
1274 return FALSE;
1275
1276 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1277 return FALSE;
1278
1279 val = bfd_get_8 (abfd, contents + offset - 1);
1280 return (val & 0xc7) == 0x83;
1281
1282 case R_386_TLS_DESC_CALL:
1283 /* Check transition from GDesc access model:
1284 call *x@tlsdesc(%rax)
1285 */
1286 if (offset + 2 <= sec->size)
1287 {
1288 /* Make sure that it's a call *x@tlsdesc(%rax). */
1289 static const unsigned char call[] = { 0xff, 0x10 };
1290 return memcmp (contents + offset, call, 2) == 0;
1291 }
1292
1293 return FALSE;
1294
1295 default:
1296 abort ();
1297 }
1298 }
1299
1300 /* Return TRUE if the TLS access transition is OK or no transition
1301 will be performed. Update R_TYPE if there is a transition. */
1302
1303 static bfd_boolean
1304 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1305 asection *sec, bfd_byte *contents,
1306 Elf_Internal_Shdr *symtab_hdr,
1307 struct elf_link_hash_entry **sym_hashes,
1308 unsigned int *r_type, int tls_type,
1309 const Elf_Internal_Rela *rel,
1310 const Elf_Internal_Rela *relend,
1311 struct elf_link_hash_entry *h,
1312 unsigned long r_symndx)
1313 {
1314 unsigned int from_type = *r_type;
1315 unsigned int to_type = from_type;
1316 bfd_boolean check = TRUE;
1317
1318 /* Skip TLS transition for functions. */
1319 if (h != NULL
1320 && (h->type == STT_FUNC
1321 || h->type == STT_GNU_IFUNC))
1322 return TRUE;
1323
1324 switch (from_type)
1325 {
1326 case R_386_TLS_GD:
1327 case R_386_TLS_GOTDESC:
1328 case R_386_TLS_DESC_CALL:
1329 case R_386_TLS_IE_32:
1330 case R_386_TLS_IE:
1331 case R_386_TLS_GOTIE:
1332 if (info->executable)
1333 {
1334 if (h == NULL)
1335 to_type = R_386_TLS_LE_32;
1336 else if (from_type != R_386_TLS_IE
1337 && from_type != R_386_TLS_GOTIE)
1338 to_type = R_386_TLS_IE_32;
1339 }
1340
1341 /* When we are called from elf_i386_relocate_section, CONTENTS
1342 isn't NULL and there may be additional transitions based on
1343 TLS_TYPE. */
1344 if (contents != NULL)
1345 {
1346 unsigned int new_to_type = to_type;
1347
1348 if (info->executable
1349 && h != NULL
1350 && h->dynindx == -1
1351 && (tls_type & GOT_TLS_IE))
1352 new_to_type = R_386_TLS_LE_32;
1353
1354 if (to_type == R_386_TLS_GD
1355 || to_type == R_386_TLS_GOTDESC
1356 || to_type == R_386_TLS_DESC_CALL)
1357 {
1358 if (tls_type == GOT_TLS_IE_POS)
1359 new_to_type = R_386_TLS_GOTIE;
1360 else if (tls_type & GOT_TLS_IE)
1361 new_to_type = R_386_TLS_IE_32;
1362 }
1363
1364 /* We checked the transition before when we were called from
1365 elf_i386_check_relocs. We only want to check the new
1366 transition which hasn't been checked before. */
1367 check = new_to_type != to_type && from_type == to_type;
1368 to_type = new_to_type;
1369 }
1370
1371 break;
1372
1373 case R_386_TLS_LDM:
1374 if (info->executable)
1375 to_type = R_386_TLS_LE_32;
1376 break;
1377
1378 default:
1379 return TRUE;
1380 }
1381
1382 /* Return TRUE if there is no transition. */
1383 if (from_type == to_type)
1384 return TRUE;
1385
1386 /* Check if the transition can be performed. */
1387 if (check
1388 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1389 symtab_hdr, sym_hashes,
1390 from_type, rel, relend))
1391 {
1392 reloc_howto_type *from, *to;
1393 const char *name;
1394
1395 from = elf_i386_rtype_to_howto (abfd, from_type);
1396 to = elf_i386_rtype_to_howto (abfd, to_type);
1397
1398 if (h)
1399 name = h->root.root.string;
1400 else
1401 {
1402 struct elf_i386_link_hash_table *htab;
1403
1404 htab = elf_i386_hash_table (info);
1405 if (htab == NULL)
1406 name = "*unknown*";
1407 else
1408 {
1409 Elf_Internal_Sym *isym;
1410
1411 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1412 abfd, r_symndx);
1413 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1414 }
1415 }
1416
1417 (*_bfd_error_handler)
1418 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1419 "in section `%A' failed"),
1420 abfd, sec, from->name, to->name, name,
1421 (unsigned long) rel->r_offset);
1422 bfd_set_error (bfd_error_bad_value);
1423 return FALSE;
1424 }
1425
1426 *r_type = to_type;
1427 return TRUE;
1428 }
1429
1430 /* Look through the relocs for a section during the first phase, and
1431 calculate needed space in the global offset table, procedure linkage
1432 table, and dynamic reloc sections. */
1433
1434 static bfd_boolean
1435 elf_i386_check_relocs (bfd *abfd,
1436 struct bfd_link_info *info,
1437 asection *sec,
1438 const Elf_Internal_Rela *relocs)
1439 {
1440 struct elf_i386_link_hash_table *htab;
1441 Elf_Internal_Shdr *symtab_hdr;
1442 struct elf_link_hash_entry **sym_hashes;
1443 const Elf_Internal_Rela *rel;
1444 const Elf_Internal_Rela *rel_end;
1445 asection *sreloc;
1446 bfd_boolean use_plt_got;
1447
1448 if (info->relocatable)
1449 return TRUE;
1450
1451 BFD_ASSERT (is_i386_elf (abfd));
1452
1453 htab = elf_i386_hash_table (info);
1454 if (htab == NULL)
1455 return FALSE;
1456
1457 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1458 && (get_elf_i386_backend_data (abfd)
1459 == &elf_i386_arch_bed));
1460
1461 symtab_hdr = &elf_symtab_hdr (abfd);
1462 sym_hashes = elf_sym_hashes (abfd);
1463
1464 sreloc = NULL;
1465
1466 rel_end = relocs + sec->reloc_count;
1467 for (rel = relocs; rel < rel_end; rel++)
1468 {
1469 unsigned int r_type;
1470 unsigned long r_symndx;
1471 struct elf_link_hash_entry *h;
1472 Elf_Internal_Sym *isym;
1473 const char *name;
1474 bfd_boolean size_reloc;
1475
1476 r_symndx = ELF32_R_SYM (rel->r_info);
1477 r_type = ELF32_R_TYPE (rel->r_info);
1478
1479 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1480 {
1481 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1482 abfd,
1483 r_symndx);
1484 return FALSE;
1485 }
1486
1487 if (r_symndx < symtab_hdr->sh_info)
1488 {
1489 /* A local symbol. */
1490 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1491 abfd, r_symndx);
1492 if (isym == NULL)
1493 return FALSE;
1494
1495 /* Check relocation against local STT_GNU_IFUNC symbol. */
1496 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1497 {
1498 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1499 if (h == NULL)
1500 return FALSE;
1501
1502 /* Fake a STT_GNU_IFUNC symbol. */
1503 h->type = STT_GNU_IFUNC;
1504 h->def_regular = 1;
1505 h->ref_regular = 1;
1506 h->forced_local = 1;
1507 h->root.type = bfd_link_hash_defined;
1508 }
1509 else
1510 h = NULL;
1511 }
1512 else
1513 {
1514 isym = NULL;
1515 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1516 while (h->root.type == bfd_link_hash_indirect
1517 || h->root.type == bfd_link_hash_warning)
1518 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1519 }
1520
1521 if (h != NULL)
1522 {
1523 /* Create the ifunc sections for static executables. If we
1524 never see an indirect function symbol nor we are building
1525 a static executable, those sections will be empty and
1526 won't appear in output. */
1527 switch (r_type)
1528 {
1529 default:
1530 break;
1531
1532 case R_386_32:
1533 case R_386_PC32:
1534 case R_386_PLT32:
1535 case R_386_GOT32:
1536 case R_386_GOTOFF:
1537 if (htab->elf.dynobj == NULL)
1538 htab->elf.dynobj = abfd;
1539 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1540 return FALSE;
1541 break;
1542 }
1543
1544 /* It is referenced by a non-shared object. */
1545 h->ref_regular = 1;
1546 h->root.non_ir_ref = 1;
1547 }
1548
1549 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1550 symtab_hdr, sym_hashes,
1551 &r_type, GOT_UNKNOWN,
1552 rel, rel_end, h, r_symndx))
1553 return FALSE;
1554
1555 switch (r_type)
1556 {
1557 case R_386_TLS_LDM:
1558 htab->tls_ldm_got.refcount += 1;
1559 goto create_got;
1560
1561 case R_386_PLT32:
1562 /* This symbol requires a procedure linkage table entry. We
1563 actually build the entry in adjust_dynamic_symbol,
1564 because this might be a case of linking PIC code which is
1565 never referenced by a dynamic object, in which case we
1566 don't need to generate a procedure linkage table entry
1567 after all. */
1568
1569 /* If this is a local symbol, we resolve it directly without
1570 creating a procedure linkage table entry. */
1571 if (h == NULL)
1572 continue;
1573
1574 h->needs_plt = 1;
1575 h->plt.refcount += 1;
1576 break;
1577
1578 case R_386_SIZE32:
1579 size_reloc = TRUE;
1580 goto do_size;
1581
1582 case R_386_TLS_IE_32:
1583 case R_386_TLS_IE:
1584 case R_386_TLS_GOTIE:
1585 if (!info->executable)
1586 info->flags |= DF_STATIC_TLS;
1587 /* Fall through */
1588
1589 case R_386_GOT32:
1590 case R_386_TLS_GD:
1591 case R_386_TLS_GOTDESC:
1592 case R_386_TLS_DESC_CALL:
1593 /* This symbol requires a global offset table entry. */
1594 {
1595 int tls_type, old_tls_type;
1596
1597 switch (r_type)
1598 {
1599 default:
1600 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1601 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1602 case R_386_TLS_GOTDESC:
1603 case R_386_TLS_DESC_CALL:
1604 tls_type = GOT_TLS_GDESC; break;
1605 case R_386_TLS_IE_32:
1606 if (ELF32_R_TYPE (rel->r_info) == r_type)
1607 tls_type = GOT_TLS_IE_NEG;
1608 else
1609 /* If this is a GD->IE transition, we may use either of
1610 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1611 tls_type = GOT_TLS_IE;
1612 break;
1613 case R_386_TLS_IE:
1614 case R_386_TLS_GOTIE:
1615 tls_type = GOT_TLS_IE_POS; break;
1616 }
1617
1618 if (h != NULL)
1619 {
1620 h->got.refcount += 1;
1621 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1622 }
1623 else
1624 {
1625 bfd_signed_vma *local_got_refcounts;
1626
1627 /* This is a global offset table entry for a local symbol. */
1628 local_got_refcounts = elf_local_got_refcounts (abfd);
1629 if (local_got_refcounts == NULL)
1630 {
1631 bfd_size_type size;
1632
1633 size = symtab_hdr->sh_info;
1634 size *= (sizeof (bfd_signed_vma)
1635 + sizeof (bfd_vma) + sizeof(char));
1636 local_got_refcounts = (bfd_signed_vma *)
1637 bfd_zalloc (abfd, size);
1638 if (local_got_refcounts == NULL)
1639 return FALSE;
1640 elf_local_got_refcounts (abfd) = local_got_refcounts;
1641 elf_i386_local_tlsdesc_gotent (abfd)
1642 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1643 elf_i386_local_got_tls_type (abfd)
1644 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1645 }
1646 local_got_refcounts[r_symndx] += 1;
1647 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1648 }
1649
1650 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1651 tls_type |= old_tls_type;
1652 /* If a TLS symbol is accessed using IE at least once,
1653 there is no point to use dynamic model for it. */
1654 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1655 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1656 || (tls_type & GOT_TLS_IE) == 0))
1657 {
1658 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1659 tls_type = old_tls_type;
1660 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1661 && GOT_TLS_GD_ANY_P (tls_type))
1662 tls_type |= old_tls_type;
1663 else
1664 {
1665 if (h)
1666 name = h->root.root.string;
1667 else
1668 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1669 NULL);
1670 (*_bfd_error_handler)
1671 (_("%B: `%s' accessed both as normal and "
1672 "thread local symbol"),
1673 abfd, name);
1674 bfd_set_error (bfd_error_bad_value);
1675 return FALSE;
1676 }
1677 }
1678
1679 if (old_tls_type != tls_type)
1680 {
1681 if (h != NULL)
1682 elf_i386_hash_entry (h)->tls_type = tls_type;
1683 else
1684 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1685 }
1686 }
1687 /* Fall through */
1688
1689 case R_386_GOTOFF:
1690 case R_386_GOTPC:
1691 create_got:
1692 if (htab->elf.sgot == NULL)
1693 {
1694 if (htab->elf.dynobj == NULL)
1695 htab->elf.dynobj = abfd;
1696 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1697 return FALSE;
1698 }
1699 if (r_type != R_386_TLS_IE)
1700 break;
1701 /* Fall through */
1702
1703 case R_386_TLS_LE_32:
1704 case R_386_TLS_LE:
1705 if (info->executable)
1706 break;
1707 info->flags |= DF_STATIC_TLS;
1708 /* Fall through */
1709
1710 case R_386_32:
1711 case R_386_PC32:
1712 if (h != NULL && info->executable)
1713 {
1714 /* If this reloc is in a read-only section, we might
1715 need a copy reloc. We can't check reliably at this
1716 stage whether the section is read-only, as input
1717 sections have not yet been mapped to output sections.
1718 Tentatively set the flag for now, and correct in
1719 adjust_dynamic_symbol. */
1720 h->non_got_ref = 1;
1721
1722 /* We may need a .plt entry if the function this reloc
1723 refers to is in a shared lib. */
1724 h->plt.refcount += 1;
1725 if (r_type != R_386_PC32)
1726 h->pointer_equality_needed = 1;
1727 }
1728
1729 size_reloc = FALSE;
1730 do_size:
1731 /* If we are creating a shared library, and this is a reloc
1732 against a global symbol, or a non PC relative reloc
1733 against a local symbol, then we need to copy the reloc
1734 into the shared library. However, if we are linking with
1735 -Bsymbolic, we do not need to copy a reloc against a
1736 global symbol which is defined in an object we are
1737 including in the link (i.e., DEF_REGULAR is set). At
1738 this point we have not seen all the input files, so it is
1739 possible that DEF_REGULAR is not set now but will be set
1740 later (it is never cleared). In case of a weak definition,
1741 DEF_REGULAR may be cleared later by a strong definition in
1742 a shared library. We account for that possibility below by
1743 storing information in the relocs_copied field of the hash
1744 table entry. A similar situation occurs when creating
1745 shared libraries and symbol visibility changes render the
1746 symbol local.
1747
1748 If on the other hand, we are creating an executable, we
1749 may need to keep relocations for symbols satisfied by a
1750 dynamic library if we manage to avoid copy relocs for the
1751 symbol. */
1752 if ((info->shared
1753 && (sec->flags & SEC_ALLOC) != 0
1754 && (r_type != R_386_PC32
1755 || (h != NULL
1756 && (! SYMBOLIC_BIND (info, h)
1757 || h->root.type == bfd_link_hash_defweak
1758 || !h->def_regular))))
1759 || (ELIMINATE_COPY_RELOCS
1760 && !info->shared
1761 && (sec->flags & SEC_ALLOC) != 0
1762 && h != NULL
1763 && (h->root.type == bfd_link_hash_defweak
1764 || !h->def_regular)))
1765 {
1766 struct elf_dyn_relocs *p;
1767 struct elf_dyn_relocs **head;
1768
1769 /* We must copy these reloc types into the output file.
1770 Create a reloc section in dynobj and make room for
1771 this reloc. */
1772 if (sreloc == NULL)
1773 {
1774 if (htab->elf.dynobj == NULL)
1775 htab->elf.dynobj = abfd;
1776
1777 sreloc = _bfd_elf_make_dynamic_reloc_section
1778 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1779
1780 if (sreloc == NULL)
1781 return FALSE;
1782 }
1783
1784 /* If this is a global symbol, we count the number of
1785 relocations we need for this symbol. */
1786 if (h != NULL)
1787 {
1788 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1789 }
1790 else
1791 {
1792 /* Track dynamic relocs needed for local syms too.
1793 We really need local syms available to do this
1794 easily. Oh well. */
1795 void **vpp;
1796 asection *s;
1797
1798 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1799 abfd, r_symndx);
1800 if (isym == NULL)
1801 return FALSE;
1802
1803 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1804 if (s == NULL)
1805 s = sec;
1806
1807 vpp = &elf_section_data (s)->local_dynrel;
1808 head = (struct elf_dyn_relocs **)vpp;
1809 }
1810
1811 p = *head;
1812 if (p == NULL || p->sec != sec)
1813 {
1814 bfd_size_type amt = sizeof *p;
1815 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1816 amt);
1817 if (p == NULL)
1818 return FALSE;
1819 p->next = *head;
1820 *head = p;
1821 p->sec = sec;
1822 p->count = 0;
1823 p->pc_count = 0;
1824 }
1825
1826 p->count += 1;
1827 /* Count size relocation as PC-relative relocation. */
1828 if (r_type == R_386_PC32 || size_reloc)
1829 p->pc_count += 1;
1830 }
1831 break;
1832
1833 /* This relocation describes the C++ object vtable hierarchy.
1834 Reconstruct it for later use during GC. */
1835 case R_386_GNU_VTINHERIT:
1836 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1837 return FALSE;
1838 break;
1839
1840 /* This relocation describes which C++ vtable entries are actually
1841 used. Record for later use during GC. */
1842 case R_386_GNU_VTENTRY:
1843 BFD_ASSERT (h != NULL);
1844 if (h != NULL
1845 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1846 return FALSE;
1847 break;
1848
1849 default:
1850 break;
1851 }
1852
1853 if (use_plt_got
1854 && h != NULL
1855 && h->plt.refcount > 0
1856 && h->got.refcount > 0
1857 && htab->plt_got == NULL)
1858 {
1859 /* Create the GOT procedure linkage table. */
1860 unsigned int plt_got_align;
1861 const struct elf_backend_data *bed;
1862
1863 bed = get_elf_backend_data (info->output_bfd);
1864 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1865 && (sizeof (elf_i386_got_plt_entry)
1866 == sizeof (elf_i386_pic_got_plt_entry)));
1867 plt_got_align = 3;
1868
1869 if (htab->elf.dynobj == NULL)
1870 htab->elf.dynobj = abfd;
1871 htab->plt_got
1872 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1873 ".plt.got",
1874 (bed->dynamic_sec_flags
1875 | SEC_ALLOC
1876 | SEC_CODE
1877 | SEC_LOAD
1878 | SEC_READONLY));
1879 if (htab->plt_got == NULL
1880 || !bfd_set_section_alignment (htab->elf.dynobj,
1881 htab->plt_got,
1882 plt_got_align))
1883 return FALSE;
1884 }
1885 }
1886
1887 return TRUE;
1888 }
1889
1890 /* Return the section that should be marked against GC for a given
1891 relocation. */
1892
1893 static asection *
1894 elf_i386_gc_mark_hook (asection *sec,
1895 struct bfd_link_info *info,
1896 Elf_Internal_Rela *rel,
1897 struct elf_link_hash_entry *h,
1898 Elf_Internal_Sym *sym)
1899 {
1900 if (h != NULL)
1901 switch (ELF32_R_TYPE (rel->r_info))
1902 {
1903 case R_386_GNU_VTINHERIT:
1904 case R_386_GNU_VTENTRY:
1905 return NULL;
1906 }
1907
1908 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1909 }
1910
1911 /* Update the got entry reference counts for the section being removed. */
1912
1913 static bfd_boolean
1914 elf_i386_gc_sweep_hook (bfd *abfd,
1915 struct bfd_link_info *info,
1916 asection *sec,
1917 const Elf_Internal_Rela *relocs)
1918 {
1919 struct elf_i386_link_hash_table *htab;
1920 Elf_Internal_Shdr *symtab_hdr;
1921 struct elf_link_hash_entry **sym_hashes;
1922 bfd_signed_vma *local_got_refcounts;
1923 const Elf_Internal_Rela *rel, *relend;
1924
1925 if (info->relocatable)
1926 return TRUE;
1927
1928 htab = elf_i386_hash_table (info);
1929 if (htab == NULL)
1930 return FALSE;
1931
1932 elf_section_data (sec)->local_dynrel = NULL;
1933
1934 symtab_hdr = &elf_symtab_hdr (abfd);
1935 sym_hashes = elf_sym_hashes (abfd);
1936 local_got_refcounts = elf_local_got_refcounts (abfd);
1937
1938 relend = relocs + sec->reloc_count;
1939 for (rel = relocs; rel < relend; rel++)
1940 {
1941 unsigned long r_symndx;
1942 unsigned int r_type;
1943 struct elf_link_hash_entry *h = NULL;
1944
1945 r_symndx = ELF32_R_SYM (rel->r_info);
1946 if (r_symndx >= symtab_hdr->sh_info)
1947 {
1948 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1949 while (h->root.type == bfd_link_hash_indirect
1950 || h->root.type == bfd_link_hash_warning)
1951 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1952 }
1953 else
1954 {
1955 /* A local symbol. */
1956 Elf_Internal_Sym *isym;
1957
1958 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1959 abfd, r_symndx);
1960
1961 /* Check relocation against local STT_GNU_IFUNC symbol. */
1962 if (isym != NULL
1963 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1964 {
1965 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1966 if (h == NULL)
1967 abort ();
1968 }
1969 }
1970
1971 if (h)
1972 {
1973 struct elf_i386_link_hash_entry *eh;
1974 struct elf_dyn_relocs **pp;
1975 struct elf_dyn_relocs *p;
1976
1977 eh = (struct elf_i386_link_hash_entry *) h;
1978 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1979 if (p->sec == sec)
1980 {
1981 /* Everything must go for SEC. */
1982 *pp = p->next;
1983 break;
1984 }
1985 }
1986
1987 r_type = ELF32_R_TYPE (rel->r_info);
1988 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1989 symtab_hdr, sym_hashes,
1990 &r_type, GOT_UNKNOWN,
1991 rel, relend, h, r_symndx))
1992 return FALSE;
1993
1994 switch (r_type)
1995 {
1996 case R_386_TLS_LDM:
1997 if (htab->tls_ldm_got.refcount > 0)
1998 htab->tls_ldm_got.refcount -= 1;
1999 break;
2000
2001 case R_386_TLS_GD:
2002 case R_386_TLS_GOTDESC:
2003 case R_386_TLS_DESC_CALL:
2004 case R_386_TLS_IE_32:
2005 case R_386_TLS_IE:
2006 case R_386_TLS_GOTIE:
2007 case R_386_GOT32:
2008 if (h != NULL)
2009 {
2010 if (h->got.refcount > 0)
2011 h->got.refcount -= 1;
2012 if (h->type == STT_GNU_IFUNC)
2013 {
2014 if (h->plt.refcount > 0)
2015 h->plt.refcount -= 1;
2016 }
2017 }
2018 else if (local_got_refcounts != NULL)
2019 {
2020 if (local_got_refcounts[r_symndx] > 0)
2021 local_got_refcounts[r_symndx] -= 1;
2022 }
2023 break;
2024
2025 case R_386_32:
2026 case R_386_PC32:
2027 case R_386_SIZE32:
2028 if (info->shared
2029 && (h == NULL || h->type != STT_GNU_IFUNC))
2030 break;
2031 /* Fall through */
2032
2033 case R_386_PLT32:
2034 if (h != NULL)
2035 {
2036 if (h->plt.refcount > 0)
2037 h->plt.refcount -= 1;
2038 }
2039 break;
2040
2041 case R_386_GOTOFF:
2042 if (h != NULL && h->type == STT_GNU_IFUNC)
2043 {
2044 if (h->got.refcount > 0)
2045 h->got.refcount -= 1;
2046 if (h->plt.refcount > 0)
2047 h->plt.refcount -= 1;
2048 }
2049 break;
2050
2051 default:
2052 break;
2053 }
2054 }
2055
2056 return TRUE;
2057 }
2058
2059 /* Adjust a symbol defined by a dynamic object and referenced by a
2060 regular object. The current definition is in some section of the
2061 dynamic object, but we're not including those sections. We have to
2062 change the definition to something the rest of the link can
2063 understand. */
2064
2065 static bfd_boolean
2066 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2067 struct elf_link_hash_entry *h)
2068 {
2069 struct elf_i386_link_hash_table *htab;
2070 asection *s;
2071 struct elf_i386_link_hash_entry *eh;
2072 struct elf_dyn_relocs *p;
2073
2074 /* STT_GNU_IFUNC symbol must go through PLT. */
2075 if (h->type == STT_GNU_IFUNC)
2076 {
2077 /* All local STT_GNU_IFUNC references must be treate as local
2078 calls via local PLT. */
2079 if (h->ref_regular
2080 && SYMBOL_CALLS_LOCAL (info, h))
2081 {
2082 bfd_size_type pc_count = 0, count = 0;
2083 struct elf_dyn_relocs **pp;
2084
2085 eh = (struct elf_i386_link_hash_entry *) h;
2086 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2087 {
2088 pc_count += p->pc_count;
2089 p->count -= p->pc_count;
2090 p->pc_count = 0;
2091 count += p->count;
2092 if (p->count == 0)
2093 *pp = p->next;
2094 else
2095 pp = &p->next;
2096 }
2097
2098 if (pc_count || count)
2099 {
2100 h->needs_plt = 1;
2101 h->non_got_ref = 1;
2102 if (h->plt.refcount <= 0)
2103 h->plt.refcount = 1;
2104 else
2105 h->plt.refcount += 1;
2106 }
2107 }
2108
2109 if (h->plt.refcount <= 0)
2110 {
2111 h->plt.offset = (bfd_vma) -1;
2112 h->needs_plt = 0;
2113 }
2114 return TRUE;
2115 }
2116
2117 /* If this is a function, put it in the procedure linkage table. We
2118 will fill in the contents of the procedure linkage table later,
2119 when we know the address of the .got section. */
2120 if (h->type == STT_FUNC
2121 || h->needs_plt)
2122 {
2123 if (h->plt.refcount <= 0
2124 || SYMBOL_CALLS_LOCAL (info, h)
2125 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2126 && h->root.type == bfd_link_hash_undefweak))
2127 {
2128 /* This case can occur if we saw a PLT32 reloc in an input
2129 file, but the symbol was never referred to by a dynamic
2130 object, or if all references were garbage collected. In
2131 such a case, we don't actually need to build a procedure
2132 linkage table, and we can just do a PC32 reloc instead. */
2133 h->plt.offset = (bfd_vma) -1;
2134 h->needs_plt = 0;
2135 }
2136
2137 return TRUE;
2138 }
2139 else
2140 /* It's possible that we incorrectly decided a .plt reloc was
2141 needed for an R_386_PC32 reloc to a non-function sym in
2142 check_relocs. We can't decide accurately between function and
2143 non-function syms in check-relocs; Objects loaded later in
2144 the link may change h->type. So fix it now. */
2145 h->plt.offset = (bfd_vma) -1;
2146
2147 /* If this is a weak symbol, and there is a real definition, the
2148 processor independent code will have arranged for us to see the
2149 real definition first, and we can just use the same value. */
2150 if (h->u.weakdef != NULL)
2151 {
2152 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2153 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2154 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2155 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2156 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2157 h->non_got_ref = h->u.weakdef->non_got_ref;
2158 return TRUE;
2159 }
2160
2161 /* This is a reference to a symbol defined by a dynamic object which
2162 is not a function. */
2163
2164 /* If we are creating a shared library, we must presume that the
2165 only references to the symbol are via the global offset table.
2166 For such cases we need not do anything here; the relocations will
2167 be handled correctly by relocate_section. */
2168 if (info->shared)
2169 return TRUE;
2170
2171 /* If there are no references to this symbol that do not use the
2172 GOT, we don't need to generate a copy reloc. */
2173 if (!h->non_got_ref)
2174 return TRUE;
2175
2176 /* If -z nocopyreloc was given, we won't generate them either. */
2177 if (info->nocopyreloc)
2178 {
2179 h->non_got_ref = 0;
2180 return TRUE;
2181 }
2182
2183 htab = elf_i386_hash_table (info);
2184 if (htab == NULL)
2185 return FALSE;
2186
2187 /* If there aren't any dynamic relocs in read-only sections, then
2188 we can keep the dynamic relocs and avoid the copy reloc. This
2189 doesn't work on VxWorks, where we can not have dynamic relocations
2190 (other than copy and jump slot relocations) in an executable. */
2191 if (ELIMINATE_COPY_RELOCS
2192 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2193 {
2194 eh = (struct elf_i386_link_hash_entry *) h;
2195 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2196 {
2197 s = p->sec->output_section;
2198 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2199 break;
2200 }
2201
2202 if (p == NULL)
2203 {
2204 h->non_got_ref = 0;
2205 return TRUE;
2206 }
2207 }
2208
2209 /* We must allocate the symbol in our .dynbss section, which will
2210 become part of the .bss section of the executable. There will be
2211 an entry for this symbol in the .dynsym section. The dynamic
2212 object will contain position independent code, so all references
2213 from the dynamic object to this symbol will go through the global
2214 offset table. The dynamic linker will use the .dynsym entry to
2215 determine the address it must put in the global offset table, so
2216 both the dynamic object and the regular object will refer to the
2217 same memory location for the variable. */
2218
2219 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2220 copy the initial value out of the dynamic object and into the
2221 runtime process image. */
2222 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2223 {
2224 htab->srelbss->size += sizeof (Elf32_External_Rel);
2225 h->needs_copy = 1;
2226 }
2227
2228 s = htab->sdynbss;
2229
2230 return _bfd_elf_adjust_dynamic_copy (h, s);
2231 }
2232
2233 /* Allocate space in .plt, .got and associated reloc sections for
2234 dynamic relocs. */
2235
2236 static bfd_boolean
2237 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2238 {
2239 struct bfd_link_info *info;
2240 struct elf_i386_link_hash_table *htab;
2241 struct elf_i386_link_hash_entry *eh;
2242 struct elf_dyn_relocs *p;
2243 unsigned plt_entry_size;
2244
2245 if (h->root.type == bfd_link_hash_indirect)
2246 return TRUE;
2247
2248 eh = (struct elf_i386_link_hash_entry *) h;
2249
2250 info = (struct bfd_link_info *) inf;
2251 htab = elf_i386_hash_table (info);
2252 if (htab == NULL)
2253 return FALSE;
2254
2255 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2256
2257 /* We can't use the GOT PLT if pointer equality is needed since
2258 finish_dynamic_symbol won't clear symbol value and the dynamic
2259 linker won't update the GOT slot. We will get into an infinite
2260 loop at run-time. */
2261 if (htab->plt_got != NULL
2262 && h->type != STT_GNU_IFUNC
2263 && !h->pointer_equality_needed
2264 && h->plt.refcount > 0
2265 && h->got.refcount > 0)
2266 {
2267 /* Don't use the regular PLT if there are both GOT and GOTPLT
2268 reloctions. */
2269 h->plt.offset = (bfd_vma) -1;
2270
2271 /* Use the GOT PLT. */
2272 eh->plt_got.refcount = 1;
2273 }
2274
2275 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2276 here if it is defined and referenced in a non-shared object. */
2277 if (h->type == STT_GNU_IFUNC
2278 && h->def_regular)
2279 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2280 plt_entry_size,
2281 plt_entry_size, 4);
2282 else if (htab->elf.dynamic_sections_created
2283 && (h->plt.refcount > 0 || eh->plt_got.refcount > 0))
2284 {
2285 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2286
2287 /* Make sure this symbol is output as a dynamic symbol.
2288 Undefined weak syms won't yet be marked as dynamic. */
2289 if (h->dynindx == -1
2290 && !h->forced_local)
2291 {
2292 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2293 return FALSE;
2294 }
2295
2296 if (info->shared
2297 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2298 {
2299 asection *s = htab->elf.splt;
2300 asection *got_s = htab->plt_got;
2301
2302 /* If this is the first .plt entry, make room for the special
2303 first entry. */
2304 if (s->size == 0)
2305 s->size = plt_entry_size;
2306
2307 if (use_plt_got)
2308 eh->plt_got.offset = got_s->size;
2309 else
2310 h->plt.offset = s->size;
2311
2312 /* If this symbol is not defined in a regular file, and we are
2313 not generating a shared library, then set the symbol to this
2314 location in the .plt. This is required to make function
2315 pointers compare as equal between the normal executable and
2316 the shared library. */
2317 if (! info->shared
2318 && !h->def_regular)
2319 {
2320 if (use_plt_got)
2321 {
2322 /* We need to make a call to the entry of the GOT PLT
2323 instead of regular PLT entry. */
2324 h->root.u.def.section = got_s;
2325 h->root.u.def.value = eh->plt_got.offset;
2326 }
2327 else
2328 {
2329 h->root.u.def.section = s;
2330 h->root.u.def.value = h->plt.offset;
2331 }
2332 }
2333
2334 /* Make room for this entry. */
2335 if (use_plt_got)
2336 got_s->size += sizeof (elf_i386_got_plt_entry);
2337 else
2338 {
2339 s->size += plt_entry_size;
2340
2341 /* We also need to make an entry in the .got.plt section,
2342 which will be placed in the .got section by the linker
2343 script. */
2344 htab->elf.sgotplt->size += 4;
2345
2346 /* We also need to make an entry in the .rel.plt section. */
2347 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2348 htab->elf.srelplt->reloc_count++;
2349 }
2350
2351 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2352 && !info->shared)
2353 {
2354 /* VxWorks has a second set of relocations for each PLT entry
2355 in executables. They go in a separate relocation section,
2356 which is processed by the kernel loader. */
2357
2358 /* There are two relocations for the initial PLT entry: an
2359 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2360 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2361
2362 if (h->plt.offset == plt_entry_size)
2363 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2364
2365 /* There are two extra relocations for each subsequent PLT entry:
2366 an R_386_32 relocation for the GOT entry, and an R_386_32
2367 relocation for the PLT entry. */
2368
2369 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2370 }
2371 }
2372 else
2373 {
2374 h->plt.offset = (bfd_vma) -1;
2375 h->needs_plt = 0;
2376 }
2377 }
2378 else
2379 {
2380 h->plt.offset = (bfd_vma) -1;
2381 h->needs_plt = 0;
2382 }
2383
2384 eh->tlsdesc_got = (bfd_vma) -1;
2385
2386 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2387 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2388 if (h->got.refcount > 0
2389 && info->executable
2390 && h->dynindx == -1
2391 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2392 h->got.offset = (bfd_vma) -1;
2393 else if (h->got.refcount > 0)
2394 {
2395 asection *s;
2396 bfd_boolean dyn;
2397 int tls_type = elf_i386_hash_entry(h)->tls_type;
2398
2399 /* Make sure this symbol is output as a dynamic symbol.
2400 Undefined weak syms won't yet be marked as dynamic. */
2401 if (h->dynindx == -1
2402 && !h->forced_local)
2403 {
2404 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2405 return FALSE;
2406 }
2407
2408 s = htab->elf.sgot;
2409 if (GOT_TLS_GDESC_P (tls_type))
2410 {
2411 eh->tlsdesc_got = htab->elf.sgotplt->size
2412 - elf_i386_compute_jump_table_size (htab);
2413 htab->elf.sgotplt->size += 8;
2414 h->got.offset = (bfd_vma) -2;
2415 }
2416 if (! GOT_TLS_GDESC_P (tls_type)
2417 || GOT_TLS_GD_P (tls_type))
2418 {
2419 h->got.offset = s->size;
2420 s->size += 4;
2421 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2422 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2423 s->size += 4;
2424 }
2425 dyn = htab->elf.dynamic_sections_created;
2426 /* R_386_TLS_IE_32 needs one dynamic relocation,
2427 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2428 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2429 need two), R_386_TLS_GD needs one if local symbol and two if
2430 global. */
2431 if (tls_type == GOT_TLS_IE_BOTH)
2432 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2433 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2434 || (tls_type & GOT_TLS_IE))
2435 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2436 else if (GOT_TLS_GD_P (tls_type))
2437 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2438 else if (! GOT_TLS_GDESC_P (tls_type)
2439 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2440 || h->root.type != bfd_link_hash_undefweak)
2441 && (info->shared
2442 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2443 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2444 if (GOT_TLS_GDESC_P (tls_type))
2445 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2446 }
2447 else
2448 h->got.offset = (bfd_vma) -1;
2449
2450 if (eh->dyn_relocs == NULL)
2451 return TRUE;
2452
2453 /* In the shared -Bsymbolic case, discard space allocated for
2454 dynamic pc-relative relocs against symbols which turn out to be
2455 defined in regular objects. For the normal shared case, discard
2456 space for pc-relative relocs that have become local due to symbol
2457 visibility changes. */
2458
2459 if (info->shared)
2460 {
2461 /* The only reloc that uses pc_count is R_386_PC32, which will
2462 appear on a call or on something like ".long foo - .". We
2463 want calls to protected symbols to resolve directly to the
2464 function rather than going via the plt. If people want
2465 function pointer comparisons to work as expected then they
2466 should avoid writing assembly like ".long foo - .". */
2467 if (SYMBOL_CALLS_LOCAL (info, h))
2468 {
2469 struct elf_dyn_relocs **pp;
2470
2471 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2472 {
2473 p->count -= p->pc_count;
2474 p->pc_count = 0;
2475 if (p->count == 0)
2476 *pp = p->next;
2477 else
2478 pp = &p->next;
2479 }
2480 }
2481
2482 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2483 {
2484 struct elf_dyn_relocs **pp;
2485 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2486 {
2487 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2488 *pp = p->next;
2489 else
2490 pp = &p->next;
2491 }
2492 }
2493
2494 /* Also discard relocs on undefined weak syms with non-default
2495 visibility. */
2496 if (eh->dyn_relocs != NULL
2497 && h->root.type == bfd_link_hash_undefweak)
2498 {
2499 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2500 eh->dyn_relocs = NULL;
2501
2502 /* Make sure undefined weak symbols are output as a dynamic
2503 symbol in PIEs. */
2504 else if (h->dynindx == -1
2505 && !h->forced_local)
2506 {
2507 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2508 return FALSE;
2509 }
2510 }
2511 }
2512 else if (ELIMINATE_COPY_RELOCS)
2513 {
2514 /* For the non-shared case, discard space for relocs against
2515 symbols which turn out to need copy relocs or are not
2516 dynamic. */
2517
2518 if (!h->non_got_ref
2519 && ((h->def_dynamic
2520 && !h->def_regular)
2521 || (htab->elf.dynamic_sections_created
2522 && (h->root.type == bfd_link_hash_undefweak
2523 || h->root.type == bfd_link_hash_undefined))))
2524 {
2525 /* Make sure this symbol is output as a dynamic symbol.
2526 Undefined weak syms won't yet be marked as dynamic. */
2527 if (h->dynindx == -1
2528 && !h->forced_local)
2529 {
2530 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2531 return FALSE;
2532 }
2533
2534 /* If that succeeded, we know we'll be keeping all the
2535 relocs. */
2536 if (h->dynindx != -1)
2537 goto keep;
2538 }
2539
2540 eh->dyn_relocs = NULL;
2541
2542 keep: ;
2543 }
2544
2545 /* Finally, allocate space. */
2546 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2547 {
2548 asection *sreloc;
2549
2550 sreloc = elf_section_data (p->sec)->sreloc;
2551
2552 BFD_ASSERT (sreloc != NULL);
2553 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2554 }
2555
2556 return TRUE;
2557 }
2558
2559 /* Allocate space in .plt, .got and associated reloc sections for
2560 local dynamic relocs. */
2561
2562 static bfd_boolean
2563 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2564 {
2565 struct elf_link_hash_entry *h
2566 = (struct elf_link_hash_entry *) *slot;
2567
2568 if (h->type != STT_GNU_IFUNC
2569 || !h->def_regular
2570 || !h->ref_regular
2571 || !h->forced_local
2572 || h->root.type != bfd_link_hash_defined)
2573 abort ();
2574
2575 return elf_i386_allocate_dynrelocs (h, inf);
2576 }
2577
2578 /* Find any dynamic relocs that apply to read-only sections. */
2579
2580 static bfd_boolean
2581 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2582 {
2583 struct elf_i386_link_hash_entry *eh;
2584 struct elf_dyn_relocs *p;
2585
2586 /* Skip local IFUNC symbols. */
2587 if (h->forced_local && h->type == STT_GNU_IFUNC)
2588 return TRUE;
2589
2590 eh = (struct elf_i386_link_hash_entry *) h;
2591 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2592 {
2593 asection *s = p->sec->output_section;
2594
2595 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2596 {
2597 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2598
2599 info->flags |= DF_TEXTREL;
2600
2601 if (info->warn_shared_textrel && info->shared)
2602 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2603 p->sec->owner, h->root.root.string,
2604 p->sec);
2605
2606 /* Not an error, just cut short the traversal. */
2607 return FALSE;
2608 }
2609 }
2610 return TRUE;
2611 }
2612
2613 /* Convert
2614 mov foo@GOT(%reg), %reg
2615 to
2616 lea foo@GOTOFF(%reg), %reg
2617 with the local symbol, foo. */
2618
2619 static bfd_boolean
2620 elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2621 struct bfd_link_info *link_info)
2622 {
2623 Elf_Internal_Shdr *symtab_hdr;
2624 Elf_Internal_Rela *internal_relocs;
2625 Elf_Internal_Rela *irel, *irelend;
2626 bfd_byte *contents;
2627 struct elf_i386_link_hash_table *htab;
2628 bfd_boolean changed_contents;
2629 bfd_boolean changed_relocs;
2630 bfd_signed_vma *local_got_refcounts;
2631
2632 /* Don't even try to convert non-ELF outputs. */
2633 if (!is_elf_hash_table (link_info->hash))
2634 return FALSE;
2635
2636 /* Nothing to do if there are no codes, no relocations or no output. */
2637 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2638 || sec->reloc_count == 0
2639 || bfd_is_abs_section (sec->output_section))
2640 return TRUE;
2641
2642 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2643
2644 /* Load the relocations for this section. */
2645 internal_relocs = (_bfd_elf_link_read_relocs
2646 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2647 link_info->keep_memory));
2648 if (internal_relocs == NULL)
2649 return FALSE;
2650
2651 htab = elf_i386_hash_table (link_info);
2652 changed_contents = FALSE;
2653 changed_relocs = FALSE;
2654 local_got_refcounts = elf_local_got_refcounts (abfd);
2655
2656 /* Get the section contents. */
2657 if (elf_section_data (sec)->this_hdr.contents != NULL)
2658 contents = elf_section_data (sec)->this_hdr.contents;
2659 else
2660 {
2661 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2662 goto error_return;
2663 }
2664
2665 irelend = internal_relocs + sec->reloc_count;
2666 for (irel = internal_relocs; irel < irelend; irel++)
2667 {
2668 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2669 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2670 unsigned int indx;
2671 struct elf_link_hash_entry *h;
2672
2673 if (r_type != R_386_GOT32)
2674 continue;
2675
2676 /* Get the symbol referred to by the reloc. */
2677 if (r_symndx < symtab_hdr->sh_info)
2678 {
2679 Elf_Internal_Sym *isym;
2680
2681 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2682 abfd, r_symndx);
2683
2684 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2685 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2686 && irel->r_offset >= 2
2687 && bfd_get_8 (input_bfd,
2688 contents + irel->r_offset - 2) == 0x8b)
2689 {
2690 bfd_put_8 (output_bfd, 0x8d,
2691 contents + irel->r_offset - 2);
2692 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2693 if (local_got_refcounts != NULL
2694 && local_got_refcounts[r_symndx] > 0)
2695 local_got_refcounts[r_symndx] -= 1;
2696 changed_contents = TRUE;
2697 changed_relocs = TRUE;
2698 }
2699 continue;
2700 }
2701
2702 indx = r_symndx - symtab_hdr->sh_info;
2703 h = elf_sym_hashes (abfd)[indx];
2704 BFD_ASSERT (h != NULL);
2705
2706 while (h->root.type == bfd_link_hash_indirect
2707 || h->root.type == bfd_link_hash_warning)
2708 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2709
2710 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2711 optimizing _DYNAMIC since ld.so may use its link-time address. */
2712 if (h->def_regular
2713 && h->type != STT_GNU_IFUNC
2714 && h != htab->elf.hdynamic
2715 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2716 && irel->r_offset >= 2
2717 && bfd_get_8 (input_bfd,
2718 contents + irel->r_offset - 2) == 0x8b)
2719 {
2720 bfd_put_8 (output_bfd, 0x8d,
2721 contents + irel->r_offset - 2);
2722 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2723 if (h->got.refcount > 0)
2724 h->got.refcount -= 1;
2725 changed_contents = TRUE;
2726 changed_relocs = TRUE;
2727 }
2728 }
2729
2730 if (contents != NULL
2731 && elf_section_data (sec)->this_hdr.contents != contents)
2732 {
2733 if (!changed_contents && !link_info->keep_memory)
2734 free (contents);
2735 else
2736 {
2737 /* Cache the section contents for elf_link_input_bfd. */
2738 elf_section_data (sec)->this_hdr.contents = contents;
2739 }
2740 }
2741
2742 if (elf_section_data (sec)->relocs != internal_relocs)
2743 {
2744 if (!changed_relocs)
2745 free (internal_relocs);
2746 else
2747 elf_section_data (sec)->relocs = internal_relocs;
2748 }
2749
2750 return TRUE;
2751
2752 error_return:
2753 if (contents != NULL
2754 && elf_section_data (sec)->this_hdr.contents != contents)
2755 free (contents);
2756 if (internal_relocs != NULL
2757 && elf_section_data (sec)->relocs != internal_relocs)
2758 free (internal_relocs);
2759 return FALSE;
2760 }
2761
2762 /* Set the sizes of the dynamic sections. */
2763
2764 static bfd_boolean
2765 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2766 {
2767 struct elf_i386_link_hash_table *htab;
2768 bfd *dynobj;
2769 asection *s;
2770 bfd_boolean relocs;
2771 bfd *ibfd;
2772
2773 htab = elf_i386_hash_table (info);
2774 if (htab == NULL)
2775 return FALSE;
2776 dynobj = htab->elf.dynobj;
2777 if (dynobj == NULL)
2778 abort ();
2779
2780 if (htab->elf.dynamic_sections_created)
2781 {
2782 /* Set the contents of the .interp section to the interpreter. */
2783 if (info->executable)
2784 {
2785 s = bfd_get_linker_section (dynobj, ".interp");
2786 if (s == NULL)
2787 abort ();
2788 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2789 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2790 }
2791 }
2792
2793 /* Set up .got offsets for local syms, and space for local dynamic
2794 relocs. */
2795 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2796 {
2797 bfd_signed_vma *local_got;
2798 bfd_signed_vma *end_local_got;
2799 char *local_tls_type;
2800 bfd_vma *local_tlsdesc_gotent;
2801 bfd_size_type locsymcount;
2802 Elf_Internal_Shdr *symtab_hdr;
2803 asection *srel;
2804
2805 if (! is_i386_elf (ibfd))
2806 continue;
2807
2808 for (s = ibfd->sections; s != NULL; s = s->next)
2809 {
2810 struct elf_dyn_relocs *p;
2811
2812 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2813 return FALSE;
2814
2815 for (p = ((struct elf_dyn_relocs *)
2816 elf_section_data (s)->local_dynrel);
2817 p != NULL;
2818 p = p->next)
2819 {
2820 if (!bfd_is_abs_section (p->sec)
2821 && bfd_is_abs_section (p->sec->output_section))
2822 {
2823 /* Input section has been discarded, either because
2824 it is a copy of a linkonce section or due to
2825 linker script /DISCARD/, so we'll be discarding
2826 the relocs too. */
2827 }
2828 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2829 && strcmp (p->sec->output_section->name,
2830 ".tls_vars") == 0)
2831 {
2832 /* Relocations in vxworks .tls_vars sections are
2833 handled specially by the loader. */
2834 }
2835 else if (p->count != 0)
2836 {
2837 srel = elf_section_data (p->sec)->sreloc;
2838 srel->size += p->count * sizeof (Elf32_External_Rel);
2839 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2840 && (info->flags & DF_TEXTREL) == 0)
2841 {
2842 info->flags |= DF_TEXTREL;
2843 if (info->warn_shared_textrel && info->shared)
2844 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2845 p->sec->owner, p->sec);
2846 }
2847 }
2848 }
2849 }
2850
2851 local_got = elf_local_got_refcounts (ibfd);
2852 if (!local_got)
2853 continue;
2854
2855 symtab_hdr = &elf_symtab_hdr (ibfd);
2856 locsymcount = symtab_hdr->sh_info;
2857 end_local_got = local_got + locsymcount;
2858 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2859 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2860 s = htab->elf.sgot;
2861 srel = htab->elf.srelgot;
2862 for (; local_got < end_local_got;
2863 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2864 {
2865 *local_tlsdesc_gotent = (bfd_vma) -1;
2866 if (*local_got > 0)
2867 {
2868 if (GOT_TLS_GDESC_P (*local_tls_type))
2869 {
2870 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2871 - elf_i386_compute_jump_table_size (htab);
2872 htab->elf.sgotplt->size += 8;
2873 *local_got = (bfd_vma) -2;
2874 }
2875 if (! GOT_TLS_GDESC_P (*local_tls_type)
2876 || GOT_TLS_GD_P (*local_tls_type))
2877 {
2878 *local_got = s->size;
2879 s->size += 4;
2880 if (GOT_TLS_GD_P (*local_tls_type)
2881 || *local_tls_type == GOT_TLS_IE_BOTH)
2882 s->size += 4;
2883 }
2884 if (info->shared
2885 || GOT_TLS_GD_ANY_P (*local_tls_type)
2886 || (*local_tls_type & GOT_TLS_IE))
2887 {
2888 if (*local_tls_type == GOT_TLS_IE_BOTH)
2889 srel->size += 2 * sizeof (Elf32_External_Rel);
2890 else if (GOT_TLS_GD_P (*local_tls_type)
2891 || ! GOT_TLS_GDESC_P (*local_tls_type))
2892 srel->size += sizeof (Elf32_External_Rel);
2893 if (GOT_TLS_GDESC_P (*local_tls_type))
2894 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2895 }
2896 }
2897 else
2898 *local_got = (bfd_vma) -1;
2899 }
2900 }
2901
2902 if (htab->tls_ldm_got.refcount > 0)
2903 {
2904 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2905 relocs. */
2906 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2907 htab->elf.sgot->size += 8;
2908 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2909 }
2910 else
2911 htab->tls_ldm_got.offset = -1;
2912
2913 /* Allocate global sym .plt and .got entries, and space for global
2914 sym dynamic relocs. */
2915 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2916
2917 /* Allocate .plt and .got entries, and space for local symbols. */
2918 htab_traverse (htab->loc_hash_table,
2919 elf_i386_allocate_local_dynrelocs,
2920 info);
2921
2922 /* For every jump slot reserved in the sgotplt, reloc_count is
2923 incremented. However, when we reserve space for TLS descriptors,
2924 it's not incremented, so in order to compute the space reserved
2925 for them, it suffices to multiply the reloc count by the jump
2926 slot size.
2927
2928 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2929 so that R_386_IRELATIVE entries come last. */
2930 if (htab->elf.srelplt)
2931 {
2932 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2933 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2934 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2935 }
2936 else if (htab->elf.irelplt)
2937 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2938
2939
2940 if (htab->elf.sgotplt)
2941 {
2942 /* Don't allocate .got.plt section if there are no GOT nor PLT
2943 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2944 if ((htab->elf.hgot == NULL
2945 || !htab->elf.hgot->ref_regular_nonweak)
2946 && (htab->elf.sgotplt->size
2947 == get_elf_backend_data (output_bfd)->got_header_size)
2948 && (htab->elf.splt == NULL
2949 || htab->elf.splt->size == 0)
2950 && (htab->elf.sgot == NULL
2951 || htab->elf.sgot->size == 0)
2952 && (htab->elf.iplt == NULL
2953 || htab->elf.iplt->size == 0)
2954 && (htab->elf.igotplt == NULL
2955 || htab->elf.igotplt->size == 0))
2956 htab->elf.sgotplt->size = 0;
2957 }
2958
2959
2960 if (htab->plt_eh_frame != NULL
2961 && htab->elf.splt != NULL
2962 && htab->elf.splt->size != 0
2963 && !bfd_is_abs_section (htab->elf.splt->output_section)
2964 && _bfd_elf_eh_frame_present (info))
2965 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
2966
2967 /* We now have determined the sizes of the various dynamic sections.
2968 Allocate memory for them. */
2969 relocs = FALSE;
2970 for (s = dynobj->sections; s != NULL; s = s->next)
2971 {
2972 bfd_boolean strip_section = TRUE;
2973
2974 if ((s->flags & SEC_LINKER_CREATED) == 0)
2975 continue;
2976
2977 if (s == htab->elf.splt
2978 || s == htab->elf.sgot)
2979 {
2980 /* Strip this section if we don't need it; see the
2981 comment below. */
2982 /* We'd like to strip these sections if they aren't needed, but if
2983 we've exported dynamic symbols from them we must leave them.
2984 It's too late to tell BFD to get rid of the symbols. */
2985
2986 if (htab->elf.hplt != NULL)
2987 strip_section = FALSE;
2988 }
2989 else if (s == htab->elf.sgotplt
2990 || s == htab->elf.iplt
2991 || s == htab->elf.igotplt
2992 || s == htab->plt_got
2993 || s == htab->plt_eh_frame
2994 || s == htab->sdynbss)
2995 {
2996 /* Strip these too. */
2997 }
2998 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2999 {
3000 if (s->size != 0
3001 && s != htab->elf.srelplt
3002 && s != htab->srelplt2)
3003 relocs = TRUE;
3004
3005 /* We use the reloc_count field as a counter if we need
3006 to copy relocs into the output file. */
3007 s->reloc_count = 0;
3008 }
3009 else
3010 {
3011 /* It's not one of our sections, so don't allocate space. */
3012 continue;
3013 }
3014
3015 if (s->size == 0)
3016 {
3017 /* If we don't need this section, strip it from the
3018 output file. This is mostly to handle .rel.bss and
3019 .rel.plt. We must create both sections in
3020 create_dynamic_sections, because they must be created
3021 before the linker maps input sections to output
3022 sections. The linker does that before
3023 adjust_dynamic_symbol is called, and it is that
3024 function which decides whether anything needs to go
3025 into these sections. */
3026 if (strip_section)
3027 s->flags |= SEC_EXCLUDE;
3028 continue;
3029 }
3030
3031 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3032 continue;
3033
3034 /* Allocate memory for the section contents. We use bfd_zalloc
3035 here in case unused entries are not reclaimed before the
3036 section's contents are written out. This should not happen,
3037 but this way if it does, we get a R_386_NONE reloc instead
3038 of garbage. */
3039 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3040 if (s->contents == NULL)
3041 return FALSE;
3042 }
3043
3044 if (htab->plt_eh_frame != NULL
3045 && htab->plt_eh_frame->contents != NULL)
3046 {
3047 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3048 sizeof (elf_i386_eh_frame_plt));
3049 bfd_put_32 (dynobj, htab->elf.splt->size,
3050 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3051 }
3052
3053 if (htab->elf.dynamic_sections_created)
3054 {
3055 /* Add some entries to the .dynamic section. We fill in the
3056 values later, in elf_i386_finish_dynamic_sections, but we
3057 must add the entries now so that we get the correct size for
3058 the .dynamic section. The DT_DEBUG entry is filled in by the
3059 dynamic linker and used by the debugger. */
3060 #define add_dynamic_entry(TAG, VAL) \
3061 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3062
3063 if (info->executable)
3064 {
3065 if (!add_dynamic_entry (DT_DEBUG, 0))
3066 return FALSE;
3067 }
3068
3069 if (htab->elf.splt->size != 0)
3070 {
3071 if (!add_dynamic_entry (DT_PLTGOT, 0)
3072 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3073 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3074 || !add_dynamic_entry (DT_JMPREL, 0))
3075 return FALSE;
3076 }
3077
3078 if (relocs)
3079 {
3080 if (!add_dynamic_entry (DT_REL, 0)
3081 || !add_dynamic_entry (DT_RELSZ, 0)
3082 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3083 return FALSE;
3084
3085 /* If any dynamic relocs apply to a read-only section,
3086 then we need a DT_TEXTREL entry. */
3087 if ((info->flags & DF_TEXTREL) == 0)
3088 elf_link_hash_traverse (&htab->elf,
3089 elf_i386_readonly_dynrelocs, info);
3090
3091 if ((info->flags & DF_TEXTREL) != 0)
3092 {
3093 if (!add_dynamic_entry (DT_TEXTREL, 0))
3094 return FALSE;
3095 }
3096 }
3097 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3098 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3099 return FALSE;
3100 }
3101 #undef add_dynamic_entry
3102
3103 return TRUE;
3104 }
3105
3106 static bfd_boolean
3107 elf_i386_always_size_sections (bfd *output_bfd,
3108 struct bfd_link_info *info)
3109 {
3110 asection *tls_sec = elf_hash_table (info)->tls_sec;
3111
3112 if (tls_sec)
3113 {
3114 struct elf_link_hash_entry *tlsbase;
3115
3116 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3117 "_TLS_MODULE_BASE_",
3118 FALSE, FALSE, FALSE);
3119
3120 if (tlsbase && tlsbase->type == STT_TLS)
3121 {
3122 struct elf_i386_link_hash_table *htab;
3123 struct bfd_link_hash_entry *bh = NULL;
3124 const struct elf_backend_data *bed
3125 = get_elf_backend_data (output_bfd);
3126
3127 htab = elf_i386_hash_table (info);
3128 if (htab == NULL)
3129 return FALSE;
3130
3131 if (!(_bfd_generic_link_add_one_symbol
3132 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3133 tls_sec, 0, NULL, FALSE,
3134 bed->collect, &bh)))
3135 return FALSE;
3136
3137 htab->tls_module_base = bh;
3138
3139 tlsbase = (struct elf_link_hash_entry *)bh;
3140 tlsbase->def_regular = 1;
3141 tlsbase->other = STV_HIDDEN;
3142 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3143 }
3144 }
3145
3146 return TRUE;
3147 }
3148
3149 /* Set the correct type for an x86 ELF section. We do this by the
3150 section name, which is a hack, but ought to work. */
3151
3152 static bfd_boolean
3153 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3154 Elf_Internal_Shdr *hdr,
3155 asection *sec)
3156 {
3157 const char *name;
3158
3159 name = bfd_get_section_name (abfd, sec);
3160
3161 /* This is an ugly, but unfortunately necessary hack that is
3162 needed when producing EFI binaries on x86. It tells
3163 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3164 containing ELF relocation info. We need this hack in order to
3165 be able to generate ELF binaries that can be translated into
3166 EFI applications (which are essentially COFF objects). Those
3167 files contain a COFF ".reloc" section inside an ELFNN object,
3168 which would normally cause BFD to segfault because it would
3169 attempt to interpret this section as containing relocation
3170 entries for section "oc". With this hack enabled, ".reloc"
3171 will be treated as a normal data section, which will avoid the
3172 segfault. However, you won't be able to create an ELFNN binary
3173 with a section named "oc" that needs relocations, but that's
3174 the kind of ugly side-effects you get when detecting section
3175 types based on their names... In practice, this limitation is
3176 unlikely to bite. */
3177 if (strcmp (name, ".reloc") == 0)
3178 hdr->sh_type = SHT_PROGBITS;
3179
3180 return TRUE;
3181 }
3182
3183 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3184 executables. Rather than setting it to the beginning of the TLS
3185 section, we have to set it to the end. This function may be called
3186 multiple times, it is idempotent. */
3187
3188 static void
3189 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3190 {
3191 struct elf_i386_link_hash_table *htab;
3192 struct bfd_link_hash_entry *base;
3193
3194 if (!info->executable)
3195 return;
3196
3197 htab = elf_i386_hash_table (info);
3198 if (htab == NULL)
3199 return;
3200
3201 base = htab->tls_module_base;
3202 if (base == NULL)
3203 return;
3204
3205 base->u.def.value = htab->elf.tls_size;
3206 }
3207
3208 /* Return the base VMA address which should be subtracted from real addresses
3209 when resolving @dtpoff relocation.
3210 This is PT_TLS segment p_vaddr. */
3211
3212 static bfd_vma
3213 elf_i386_dtpoff_base (struct bfd_link_info *info)
3214 {
3215 /* If tls_sec is NULL, we should have signalled an error already. */
3216 if (elf_hash_table (info)->tls_sec == NULL)
3217 return 0;
3218 return elf_hash_table (info)->tls_sec->vma;
3219 }
3220
3221 /* Return the relocation value for @tpoff relocation
3222 if STT_TLS virtual address is ADDRESS. */
3223
3224 static bfd_vma
3225 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3226 {
3227 struct elf_link_hash_table *htab = elf_hash_table (info);
3228 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3229 bfd_vma static_tls_size;
3230
3231 /* If tls_sec is NULL, we should have signalled an error already. */
3232 if (htab->tls_sec == NULL)
3233 return 0;
3234
3235 /* Consider special static TLS alignment requirements. */
3236 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3237 return static_tls_size + htab->tls_sec->vma - address;
3238 }
3239
3240 /* Relocate an i386 ELF section. */
3241
3242 static bfd_boolean
3243 elf_i386_relocate_section (bfd *output_bfd,
3244 struct bfd_link_info *info,
3245 bfd *input_bfd,
3246 asection *input_section,
3247 bfd_byte *contents,
3248 Elf_Internal_Rela *relocs,
3249 Elf_Internal_Sym *local_syms,
3250 asection **local_sections)
3251 {
3252 struct elf_i386_link_hash_table *htab;
3253 Elf_Internal_Shdr *symtab_hdr;
3254 struct elf_link_hash_entry **sym_hashes;
3255 bfd_vma *local_got_offsets;
3256 bfd_vma *local_tlsdesc_gotents;
3257 Elf_Internal_Rela *rel;
3258 Elf_Internal_Rela *relend;
3259 bfd_boolean is_vxworks_tls;
3260 unsigned plt_entry_size;
3261
3262 BFD_ASSERT (is_i386_elf (input_bfd));
3263
3264 htab = elf_i386_hash_table (info);
3265 if (htab == NULL)
3266 return FALSE;
3267 symtab_hdr = &elf_symtab_hdr (input_bfd);
3268 sym_hashes = elf_sym_hashes (input_bfd);
3269 local_got_offsets = elf_local_got_offsets (input_bfd);
3270 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3271 /* We have to handle relocations in vxworks .tls_vars sections
3272 specially, because the dynamic loader is 'weird'. */
3273 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3274 && info->shared
3275 && !strcmp (input_section->output_section->name,
3276 ".tls_vars"));
3277
3278 elf_i386_set_tls_module_base (info);
3279
3280 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3281
3282 rel = relocs;
3283 relend = relocs + input_section->reloc_count;
3284 for (; rel < relend; rel++)
3285 {
3286 unsigned int r_type;
3287 reloc_howto_type *howto;
3288 unsigned long r_symndx;
3289 struct elf_link_hash_entry *h;
3290 struct elf_i386_link_hash_entry *eh;
3291 Elf_Internal_Sym *sym;
3292 asection *sec;
3293 bfd_vma off, offplt, plt_offset;
3294 bfd_vma relocation;
3295 bfd_boolean unresolved_reloc;
3296 bfd_reloc_status_type r;
3297 unsigned int indx;
3298 int tls_type;
3299 bfd_vma st_size;
3300 asection *resolved_plt;
3301
3302 r_type = ELF32_R_TYPE (rel->r_info);
3303 if (r_type == R_386_GNU_VTINHERIT
3304 || r_type == R_386_GNU_VTENTRY)
3305 continue;
3306
3307 if ((indx = r_type) >= R_386_standard
3308 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3309 >= R_386_ext - R_386_standard)
3310 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3311 >= R_386_irelative - R_386_ext))
3312 {
3313 (*_bfd_error_handler)
3314 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3315 input_bfd, input_section, r_type);
3316 bfd_set_error (bfd_error_bad_value);
3317 return FALSE;
3318 }
3319 howto = elf_howto_table + indx;
3320
3321 r_symndx = ELF32_R_SYM (rel->r_info);
3322 h = NULL;
3323 sym = NULL;
3324 sec = NULL;
3325 unresolved_reloc = FALSE;
3326 if (r_symndx < symtab_hdr->sh_info)
3327 {
3328 sym = local_syms + r_symndx;
3329 sec = local_sections[r_symndx];
3330 relocation = (sec->output_section->vma
3331 + sec->output_offset
3332 + sym->st_value);
3333 st_size = sym->st_size;
3334
3335 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3336 && ((sec->flags & SEC_MERGE) != 0
3337 || (info->relocatable
3338 && sec->output_offset != 0)))
3339 {
3340 bfd_vma addend;
3341 bfd_byte *where = contents + rel->r_offset;
3342
3343 switch (howto->size)
3344 {
3345 case 0:
3346 addend = bfd_get_8 (input_bfd, where);
3347 if (howto->pc_relative)
3348 {
3349 addend = (addend ^ 0x80) - 0x80;
3350 addend += 1;
3351 }
3352 break;
3353 case 1:
3354 addend = bfd_get_16 (input_bfd, where);
3355 if (howto->pc_relative)
3356 {
3357 addend = (addend ^ 0x8000) - 0x8000;
3358 addend += 2;
3359 }
3360 break;
3361 case 2:
3362 addend = bfd_get_32 (input_bfd, where);
3363 if (howto->pc_relative)
3364 {
3365 addend = (addend ^ 0x80000000) - 0x80000000;
3366 addend += 4;
3367 }
3368 break;
3369 default:
3370 abort ();
3371 }
3372
3373 if (info->relocatable)
3374 addend += sec->output_offset;
3375 else
3376 {
3377 asection *msec = sec;
3378 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3379 addend);
3380 addend -= relocation;
3381 addend += msec->output_section->vma + msec->output_offset;
3382 }
3383
3384 switch (howto->size)
3385 {
3386 case 0:
3387 /* FIXME: overflow checks. */
3388 if (howto->pc_relative)
3389 addend -= 1;
3390 bfd_put_8 (input_bfd, addend, where);
3391 break;
3392 case 1:
3393 if (howto->pc_relative)
3394 addend -= 2;
3395 bfd_put_16 (input_bfd, addend, where);
3396 break;
3397 case 2:
3398 if (howto->pc_relative)
3399 addend -= 4;
3400 bfd_put_32 (input_bfd, addend, where);
3401 break;
3402 }
3403 }
3404 else if (!info->relocatable
3405 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3406 {
3407 /* Relocate against local STT_GNU_IFUNC symbol. */
3408 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3409 FALSE);
3410 if (h == NULL)
3411 abort ();
3412
3413 /* Set STT_GNU_IFUNC symbol value. */
3414 h->root.u.def.value = sym->st_value;
3415 h->root.u.def.section = sec;
3416 }
3417 }
3418 else
3419 {
3420 bfd_boolean warned ATTRIBUTE_UNUSED;
3421 bfd_boolean ignored ATTRIBUTE_UNUSED;
3422
3423 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3424 r_symndx, symtab_hdr, sym_hashes,
3425 h, sec, relocation,
3426 unresolved_reloc, warned, ignored);
3427 st_size = h->size;
3428 }
3429
3430 if (sec != NULL && discarded_section (sec))
3431 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3432 rel, 1, relend, howto, 0, contents);
3433
3434 if (info->relocatable)
3435 continue;
3436
3437 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3438 it here if it is defined in a non-shared object. */
3439 if (h != NULL
3440 && h->type == STT_GNU_IFUNC
3441 && h->def_regular)
3442 {
3443 asection *plt, *gotplt, *base_got;
3444 bfd_vma plt_index;
3445 const char *name;
3446
3447 if ((input_section->flags & SEC_ALLOC) == 0
3448 || h->plt.offset == (bfd_vma) -1)
3449 abort ();
3450
3451 /* STT_GNU_IFUNC symbol must go through PLT. */
3452 if (htab->elf.splt != NULL)
3453 {
3454 plt = htab->elf.splt;
3455 gotplt = htab->elf.sgotplt;
3456 }
3457 else
3458 {
3459 plt = htab->elf.iplt;
3460 gotplt = htab->elf.igotplt;
3461 }
3462
3463 relocation = (plt->output_section->vma
3464 + plt->output_offset + h->plt.offset);
3465
3466 switch (r_type)
3467 {
3468 default:
3469 if (h->root.root.string)
3470 name = h->root.root.string;
3471 else
3472 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3473 NULL);
3474 (*_bfd_error_handler)
3475 (_("%B: relocation %s against STT_GNU_IFUNC "
3476 "symbol `%s' isn't handled by %s"), input_bfd,
3477 elf_howto_table[r_type].name,
3478 name, __FUNCTION__);
3479 bfd_set_error (bfd_error_bad_value);
3480 return FALSE;
3481
3482 case R_386_32:
3483 /* Generate dynamic relcoation only when there is a
3484 non-GOT reference in a shared object. */
3485 if (info->shared && h->non_got_ref)
3486 {
3487 Elf_Internal_Rela outrel;
3488 asection *sreloc;
3489 bfd_vma offset;
3490
3491 /* Need a dynamic relocation to get the real function
3492 adddress. */
3493 offset = _bfd_elf_section_offset (output_bfd,
3494 info,
3495 input_section,
3496 rel->r_offset);
3497 if (offset == (bfd_vma) -1
3498 || offset == (bfd_vma) -2)
3499 abort ();
3500
3501 outrel.r_offset = (input_section->output_section->vma
3502 + input_section->output_offset
3503 + offset);
3504
3505 if (h->dynindx == -1
3506 || h->forced_local
3507 || info->executable)
3508 {
3509 /* This symbol is resolved locally. */
3510 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3511 bfd_put_32 (output_bfd,
3512 (h->root.u.def.value
3513 + h->root.u.def.section->output_section->vma
3514 + h->root.u.def.section->output_offset),
3515 contents + offset);
3516 }
3517 else
3518 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3519
3520 sreloc = htab->elf.irelifunc;
3521 elf_append_rel (output_bfd, sreloc, &outrel);
3522
3523 /* If this reloc is against an external symbol, we
3524 do not want to fiddle with the addend. Otherwise,
3525 we need to include the symbol value so that it
3526 becomes an addend for the dynamic reloc. For an
3527 internal symbol, we have updated addend. */
3528 continue;
3529 }
3530 /* FALLTHROUGH */
3531 case R_386_PC32:
3532 case R_386_PLT32:
3533 goto do_relocation;
3534
3535 case R_386_GOT32:
3536 base_got = htab->elf.sgot;
3537 off = h->got.offset;
3538
3539 if (base_got == NULL)
3540 abort ();
3541
3542 if (off == (bfd_vma) -1)
3543 {
3544 /* We can't use h->got.offset here to save state, or
3545 even just remember the offset, as finish_dynamic_symbol
3546 would use that as offset into .got. */
3547
3548 if (htab->elf.splt != NULL)
3549 {
3550 plt_index = h->plt.offset / plt_entry_size - 1;
3551 off = (plt_index + 3) * 4;
3552 base_got = htab->elf.sgotplt;
3553 }
3554 else
3555 {
3556 plt_index = h->plt.offset / plt_entry_size;
3557 off = plt_index * 4;
3558 base_got = htab->elf.igotplt;
3559 }
3560
3561 if (h->dynindx == -1
3562 || h->forced_local
3563 || info->symbolic)
3564 {
3565 /* This references the local defitionion. We must
3566 initialize this entry in the global offset table.
3567 Since the offset must always be a multiple of 8,
3568 we use the least significant bit to record
3569 whether we have initialized it already.
3570
3571 When doing a dynamic link, we create a .rela.got
3572 relocation entry to initialize the value. This
3573 is done in the finish_dynamic_symbol routine. */
3574 if ((off & 1) != 0)
3575 off &= ~1;
3576 else
3577 {
3578 bfd_put_32 (output_bfd, relocation,
3579 base_got->contents + off);
3580 h->got.offset |= 1;
3581 }
3582 }
3583
3584 relocation = off;
3585
3586 /* Adjust for static executables. */
3587 if (htab->elf.splt == NULL)
3588 relocation += gotplt->output_offset;
3589 }
3590 else
3591 {
3592 relocation = (base_got->output_section->vma
3593 + base_got->output_offset + off
3594 - gotplt->output_section->vma
3595 - gotplt->output_offset);
3596 /* Adjust for static executables. */
3597 if (htab->elf.splt == NULL)
3598 relocation += gotplt->output_offset;
3599 }
3600
3601 goto do_relocation;
3602
3603 case R_386_GOTOFF:
3604 relocation -= (gotplt->output_section->vma
3605 + gotplt->output_offset);
3606 goto do_relocation;
3607 }
3608 }
3609
3610 switch (r_type)
3611 {
3612 case R_386_GOT32:
3613 /* Relocation is to the entry for this symbol in the global
3614 offset table. */
3615 if (htab->elf.sgot == NULL)
3616 abort ();
3617
3618 if (h != NULL)
3619 {
3620 bfd_boolean dyn;
3621
3622 off = h->got.offset;
3623 dyn = htab->elf.dynamic_sections_created;
3624 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3625 || (info->shared
3626 && SYMBOL_REFERENCES_LOCAL (info, h))
3627 || (ELF_ST_VISIBILITY (h->other)
3628 && h->root.type == bfd_link_hash_undefweak))
3629 {
3630 /* This is actually a static link, or it is a
3631 -Bsymbolic link and the symbol is defined
3632 locally, or the symbol was forced to be local
3633 because of a version file. We must initialize
3634 this entry in the global offset table. Since the
3635 offset must always be a multiple of 4, we use the
3636 least significant bit to record whether we have
3637 initialized it already.
3638
3639 When doing a dynamic link, we create a .rel.got
3640 relocation entry to initialize the value. This
3641 is done in the finish_dynamic_symbol routine. */
3642 if ((off & 1) != 0)
3643 off &= ~1;
3644 else
3645 {
3646 bfd_put_32 (output_bfd, relocation,
3647 htab->elf.sgot->contents + off);
3648 h->got.offset |= 1;
3649 }
3650 }
3651 else
3652 unresolved_reloc = FALSE;
3653 }
3654 else
3655 {
3656 if (local_got_offsets == NULL)
3657 abort ();
3658
3659 off = local_got_offsets[r_symndx];
3660
3661 /* The offset must always be a multiple of 4. We use
3662 the least significant bit to record whether we have
3663 already generated the necessary reloc. */
3664 if ((off & 1) != 0)
3665 off &= ~1;
3666 else
3667 {
3668 bfd_put_32 (output_bfd, relocation,
3669 htab->elf.sgot->contents + off);
3670
3671 if (info->shared)
3672 {
3673 asection *s;
3674 Elf_Internal_Rela outrel;
3675
3676 s = htab->elf.srelgot;
3677 if (s == NULL)
3678 abort ();
3679
3680 outrel.r_offset = (htab->elf.sgot->output_section->vma
3681 + htab->elf.sgot->output_offset
3682 + off);
3683 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3684 elf_append_rel (output_bfd, s, &outrel);
3685 }
3686
3687 local_got_offsets[r_symndx] |= 1;
3688 }
3689 }
3690
3691 if (off >= (bfd_vma) -2)
3692 abort ();
3693
3694 relocation = htab->elf.sgot->output_section->vma
3695 + htab->elf.sgot->output_offset + off
3696 - htab->elf.sgotplt->output_section->vma
3697 - htab->elf.sgotplt->output_offset;
3698 break;
3699
3700 case R_386_GOTOFF:
3701 /* Relocation is relative to the start of the global offset
3702 table. */
3703
3704 /* Check to make sure it isn't a protected function symbol
3705 for shared library since it may not be local when used
3706 as function address. We also need to make sure that a
3707 symbol is defined locally. */
3708 if (info->shared && h)
3709 {
3710 if (!h->def_regular)
3711 {
3712 const char *v;
3713
3714 switch (ELF_ST_VISIBILITY (h->other))
3715 {
3716 case STV_HIDDEN:
3717 v = _("hidden symbol");
3718 break;
3719 case STV_INTERNAL:
3720 v = _("internal symbol");
3721 break;
3722 case STV_PROTECTED:
3723 v = _("protected symbol");
3724 break;
3725 default:
3726 v = _("symbol");
3727 break;
3728 }
3729
3730 (*_bfd_error_handler)
3731 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3732 input_bfd, v, h->root.root.string);
3733 bfd_set_error (bfd_error_bad_value);
3734 return FALSE;
3735 }
3736 else if (!info->executable
3737 && !SYMBOLIC_BIND (info, h)
3738 && h->type == STT_FUNC
3739 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3740 {
3741 (*_bfd_error_handler)
3742 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3743 input_bfd, h->root.root.string);
3744 bfd_set_error (bfd_error_bad_value);
3745 return FALSE;
3746 }
3747 }
3748
3749 /* Note that sgot is not involved in this
3750 calculation. We always want the start of .got.plt. If we
3751 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3752 permitted by the ABI, we might have to change this
3753 calculation. */
3754 relocation -= htab->elf.sgotplt->output_section->vma
3755 + htab->elf.sgotplt->output_offset;
3756 break;
3757
3758 case R_386_GOTPC:
3759 /* Use global offset table as symbol value. */
3760 relocation = htab->elf.sgotplt->output_section->vma
3761 + htab->elf.sgotplt->output_offset;
3762 unresolved_reloc = FALSE;
3763 break;
3764
3765 case R_386_PLT32:
3766 /* Relocation is to the entry for this symbol in the
3767 procedure linkage table. */
3768
3769 /* Resolve a PLT32 reloc against a local symbol directly,
3770 without using the procedure linkage table. */
3771 if (h == NULL)
3772 break;
3773
3774 eh = (struct elf_i386_link_hash_entry *) h;
3775 if ((h->plt.offset == (bfd_vma) -1
3776 && eh->plt_got.offset == (bfd_vma) -1)
3777 || htab->elf.splt == NULL)
3778 {
3779 /* We didn't make a PLT entry for this symbol. This
3780 happens when statically linking PIC code, or when
3781 using -Bsymbolic. */
3782 break;
3783 }
3784
3785 if (h->plt.offset != (bfd_vma) -1)
3786 {
3787 resolved_plt = htab->elf.splt;
3788 plt_offset = h->plt.offset;
3789 }
3790 else
3791 {
3792 resolved_plt = htab->plt_got;
3793 plt_offset = eh->plt_got.offset;
3794 }
3795
3796 relocation = (resolved_plt->output_section->vma
3797 + resolved_plt->output_offset
3798 + plt_offset);
3799 unresolved_reloc = FALSE;
3800 break;
3801
3802 case R_386_SIZE32:
3803 /* Set to symbol size. */
3804 relocation = st_size;
3805 /* Fall through. */
3806
3807 case R_386_32:
3808 case R_386_PC32:
3809 if ((input_section->flags & SEC_ALLOC) == 0
3810 || is_vxworks_tls)
3811 break;
3812
3813 if ((info->shared
3814 && (h == NULL
3815 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3816 || h->root.type != bfd_link_hash_undefweak)
3817 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3818 || !SYMBOL_CALLS_LOCAL (info, h)))
3819 || (ELIMINATE_COPY_RELOCS
3820 && !info->shared
3821 && h != NULL
3822 && h->dynindx != -1
3823 && !h->non_got_ref
3824 && ((h->def_dynamic
3825 && !h->def_regular)
3826 || h->root.type == bfd_link_hash_undefweak
3827 || h->root.type == bfd_link_hash_undefined)))
3828 {
3829 Elf_Internal_Rela outrel;
3830 bfd_boolean skip, relocate;
3831 asection *sreloc;
3832
3833 /* When generating a shared object, these relocations
3834 are copied into the output file to be resolved at run
3835 time. */
3836
3837 skip = FALSE;
3838 relocate = FALSE;
3839
3840 outrel.r_offset =
3841 _bfd_elf_section_offset (output_bfd, info, input_section,
3842 rel->r_offset);
3843 if (outrel.r_offset == (bfd_vma) -1)
3844 skip = TRUE;
3845 else if (outrel.r_offset == (bfd_vma) -2)
3846 skip = TRUE, relocate = TRUE;
3847 outrel.r_offset += (input_section->output_section->vma
3848 + input_section->output_offset);
3849
3850 if (skip)
3851 memset (&outrel, 0, sizeof outrel);
3852 else if (h != NULL
3853 && h->dynindx != -1
3854 && (r_type == R_386_PC32
3855 || !info->shared
3856 || !SYMBOLIC_BIND (info, h)
3857 || !h->def_regular))
3858 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3859 else
3860 {
3861 /* This symbol is local, or marked to become local. */
3862 relocate = TRUE;
3863 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3864 }
3865
3866 sreloc = elf_section_data (input_section)->sreloc;
3867
3868 if (sreloc == NULL || sreloc->contents == NULL)
3869 {
3870 r = bfd_reloc_notsupported;
3871 goto check_relocation_error;
3872 }
3873
3874 elf_append_rel (output_bfd, sreloc, &outrel);
3875
3876 /* If this reloc is against an external symbol, we do
3877 not want to fiddle with the addend. Otherwise, we
3878 need to include the symbol value so that it becomes
3879 an addend for the dynamic reloc. */
3880 if (! relocate)
3881 continue;
3882 }
3883 break;
3884
3885 case R_386_TLS_IE:
3886 if (!info->executable)
3887 {
3888 Elf_Internal_Rela outrel;
3889 asection *sreloc;
3890
3891 outrel.r_offset = rel->r_offset
3892 + input_section->output_section->vma
3893 + input_section->output_offset;
3894 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3895 sreloc = elf_section_data (input_section)->sreloc;
3896 if (sreloc == NULL)
3897 abort ();
3898 elf_append_rel (output_bfd, sreloc, &outrel);
3899 }
3900 /* Fall through */
3901
3902 case R_386_TLS_GD:
3903 case R_386_TLS_GOTDESC:
3904 case R_386_TLS_DESC_CALL:
3905 case R_386_TLS_IE_32:
3906 case R_386_TLS_GOTIE:
3907 tls_type = GOT_UNKNOWN;
3908 if (h == NULL && local_got_offsets)
3909 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3910 else if (h != NULL)
3911 tls_type = elf_i386_hash_entry(h)->tls_type;
3912 if (tls_type == GOT_TLS_IE)
3913 tls_type = GOT_TLS_IE_NEG;
3914
3915 if (! elf_i386_tls_transition (info, input_bfd,
3916 input_section, contents,
3917 symtab_hdr, sym_hashes,
3918 &r_type, tls_type, rel,
3919 relend, h, r_symndx))
3920 return FALSE;
3921
3922 if (r_type == R_386_TLS_LE_32)
3923 {
3924 BFD_ASSERT (! unresolved_reloc);
3925 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3926 {
3927 unsigned int type;
3928 bfd_vma roff;
3929
3930 /* GD->LE transition. */
3931 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3932 if (type == 0x04)
3933 {
3934 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3935 Change it into:
3936 movl %gs:0, %eax; subl $foo@tpoff, %eax
3937 (6 byte form of subl). */
3938 memcpy (contents + rel->r_offset - 3,
3939 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3940 roff = rel->r_offset + 5;
3941 }
3942 else
3943 {
3944 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3945 Change it into:
3946 movl %gs:0, %eax; subl $foo@tpoff, %eax
3947 (6 byte form of subl). */
3948 memcpy (contents + rel->r_offset - 2,
3949 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3950 roff = rel->r_offset + 6;
3951 }
3952 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3953 contents + roff);
3954 /* Skip R_386_PC32/R_386_PLT32. */
3955 rel++;
3956 continue;
3957 }
3958 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3959 {
3960 /* GDesc -> LE transition.
3961 It's originally something like:
3962 leal x@tlsdesc(%ebx), %eax
3963
3964 leal x@ntpoff, %eax
3965
3966 Registers other than %eax may be set up here. */
3967
3968 unsigned int val;
3969 bfd_vma roff;
3970
3971 roff = rel->r_offset;
3972 val = bfd_get_8 (input_bfd, contents + roff - 1);
3973
3974 /* Now modify the instruction as appropriate. */
3975 /* aoliva FIXME: remove the above and xor the byte
3976 below with 0x86. */
3977 bfd_put_8 (output_bfd, val ^ 0x86,
3978 contents + roff - 1);
3979 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3980 contents + roff);
3981 continue;
3982 }
3983 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3984 {
3985 /* GDesc -> LE transition.
3986 It's originally:
3987 call *(%eax)
3988 Turn it into:
3989 xchg %ax,%ax */
3990
3991 bfd_vma roff;
3992
3993 roff = rel->r_offset;
3994 bfd_put_8 (output_bfd, 0x66, contents + roff);
3995 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3996 continue;
3997 }
3998 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3999 {
4000 unsigned int val;
4001
4002 /* IE->LE transition:
4003 Originally it can be one of:
4004 movl foo, %eax
4005 movl foo, %reg
4006 addl foo, %reg
4007 We change it into:
4008 movl $foo, %eax
4009 movl $foo, %reg
4010 addl $foo, %reg. */
4011 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4012 if (val == 0xa1)
4013 {
4014 /* movl foo, %eax. */
4015 bfd_put_8 (output_bfd, 0xb8,
4016 contents + rel->r_offset - 1);
4017 }
4018 else
4019 {
4020 unsigned int type;
4021
4022 type = bfd_get_8 (input_bfd,
4023 contents + rel->r_offset - 2);
4024 switch (type)
4025 {
4026 case 0x8b:
4027 /* movl */
4028 bfd_put_8 (output_bfd, 0xc7,
4029 contents + rel->r_offset - 2);
4030 bfd_put_8 (output_bfd,
4031 0xc0 | ((val >> 3) & 7),
4032 contents + rel->r_offset - 1);
4033 break;
4034 case 0x03:
4035 /* addl */
4036 bfd_put_8 (output_bfd, 0x81,
4037 contents + rel->r_offset - 2);
4038 bfd_put_8 (output_bfd,
4039 0xc0 | ((val >> 3) & 7),
4040 contents + rel->r_offset - 1);
4041 break;
4042 default:
4043 BFD_FAIL ();
4044 break;
4045 }
4046 }
4047 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4048 contents + rel->r_offset);
4049 continue;
4050 }
4051 else
4052 {
4053 unsigned int val, type;
4054
4055 /* {IE_32,GOTIE}->LE transition:
4056 Originally it can be one of:
4057 subl foo(%reg1), %reg2
4058 movl foo(%reg1), %reg2
4059 addl foo(%reg1), %reg2
4060 We change it into:
4061 subl $foo, %reg2
4062 movl $foo, %reg2 (6 byte form)
4063 addl $foo, %reg2. */
4064 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4065 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4066 if (type == 0x8b)
4067 {
4068 /* movl */
4069 bfd_put_8 (output_bfd, 0xc7,
4070 contents + rel->r_offset - 2);
4071 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4072 contents + rel->r_offset - 1);
4073 }
4074 else if (type == 0x2b)
4075 {
4076 /* subl */
4077 bfd_put_8 (output_bfd, 0x81,
4078 contents + rel->r_offset - 2);
4079 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4080 contents + rel->r_offset - 1);
4081 }
4082 else if (type == 0x03)
4083 {
4084 /* addl */
4085 bfd_put_8 (output_bfd, 0x81,
4086 contents + rel->r_offset - 2);
4087 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4088 contents + rel->r_offset - 1);
4089 }
4090 else
4091 BFD_FAIL ();
4092 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4093 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4094 contents + rel->r_offset);
4095 else
4096 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4097 contents + rel->r_offset);
4098 continue;
4099 }
4100 }
4101
4102 if (htab->elf.sgot == NULL)
4103 abort ();
4104
4105 if (h != NULL)
4106 {
4107 off = h->got.offset;
4108 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4109 }
4110 else
4111 {
4112 if (local_got_offsets == NULL)
4113 abort ();
4114
4115 off = local_got_offsets[r_symndx];
4116 offplt = local_tlsdesc_gotents[r_symndx];
4117 }
4118
4119 if ((off & 1) != 0)
4120 off &= ~1;
4121 else
4122 {
4123 Elf_Internal_Rela outrel;
4124 int dr_type;
4125 asection *sreloc;
4126
4127 if (htab->elf.srelgot == NULL)
4128 abort ();
4129
4130 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4131
4132 if (GOT_TLS_GDESC_P (tls_type))
4133 {
4134 bfd_byte *loc;
4135 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4136 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4137 <= htab->elf.sgotplt->size);
4138 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4139 + htab->elf.sgotplt->output_offset
4140 + offplt
4141 + htab->sgotplt_jump_table_size);
4142 sreloc = htab->elf.srelplt;
4143 loc = sreloc->contents;
4144 loc += (htab->next_tls_desc_index++
4145 * sizeof (Elf32_External_Rel));
4146 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4147 <= sreloc->contents + sreloc->size);
4148 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4149 if (indx == 0)
4150 {
4151 BFD_ASSERT (! unresolved_reloc);
4152 bfd_put_32 (output_bfd,
4153 relocation - elf_i386_dtpoff_base (info),
4154 htab->elf.sgotplt->contents + offplt
4155 + htab->sgotplt_jump_table_size + 4);
4156 }
4157 else
4158 {
4159 bfd_put_32 (output_bfd, 0,
4160 htab->elf.sgotplt->contents + offplt
4161 + htab->sgotplt_jump_table_size + 4);
4162 }
4163 }
4164
4165 sreloc = htab->elf.srelgot;
4166
4167 outrel.r_offset = (htab->elf.sgot->output_section->vma
4168 + htab->elf.sgot->output_offset + off);
4169
4170 if (GOT_TLS_GD_P (tls_type))
4171 dr_type = R_386_TLS_DTPMOD32;
4172 else if (GOT_TLS_GDESC_P (tls_type))
4173 goto dr_done;
4174 else if (tls_type == GOT_TLS_IE_POS)
4175 dr_type = R_386_TLS_TPOFF;
4176 else
4177 dr_type = R_386_TLS_TPOFF32;
4178
4179 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4180 bfd_put_32 (output_bfd,
4181 relocation - elf_i386_dtpoff_base (info),
4182 htab->elf.sgot->contents + off);
4183 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4184 bfd_put_32 (output_bfd,
4185 elf_i386_dtpoff_base (info) - relocation,
4186 htab->elf.sgot->contents + off);
4187 else if (dr_type != R_386_TLS_DESC)
4188 bfd_put_32 (output_bfd, 0,
4189 htab->elf.sgot->contents + off);
4190 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4191
4192 elf_append_rel (output_bfd, sreloc, &outrel);
4193
4194 if (GOT_TLS_GD_P (tls_type))
4195 {
4196 if (indx == 0)
4197 {
4198 BFD_ASSERT (! unresolved_reloc);
4199 bfd_put_32 (output_bfd,
4200 relocation - elf_i386_dtpoff_base (info),
4201 htab->elf.sgot->contents + off + 4);
4202 }
4203 else
4204 {
4205 bfd_put_32 (output_bfd, 0,
4206 htab->elf.sgot->contents + off + 4);
4207 outrel.r_info = ELF32_R_INFO (indx,
4208 R_386_TLS_DTPOFF32);
4209 outrel.r_offset += 4;
4210 elf_append_rel (output_bfd, sreloc, &outrel);
4211 }
4212 }
4213 else if (tls_type == GOT_TLS_IE_BOTH)
4214 {
4215 bfd_put_32 (output_bfd,
4216 (indx == 0
4217 ? relocation - elf_i386_dtpoff_base (info)
4218 : 0),
4219 htab->elf.sgot->contents + off + 4);
4220 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4221 outrel.r_offset += 4;
4222 elf_append_rel (output_bfd, sreloc, &outrel);
4223 }
4224
4225 dr_done:
4226 if (h != NULL)
4227 h->got.offset |= 1;
4228 else
4229 local_got_offsets[r_symndx] |= 1;
4230 }
4231
4232 if (off >= (bfd_vma) -2
4233 && ! GOT_TLS_GDESC_P (tls_type))
4234 abort ();
4235 if (r_type == R_386_TLS_GOTDESC
4236 || r_type == R_386_TLS_DESC_CALL)
4237 {
4238 relocation = htab->sgotplt_jump_table_size + offplt;
4239 unresolved_reloc = FALSE;
4240 }
4241 else if (r_type == ELF32_R_TYPE (rel->r_info))
4242 {
4243 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4244 + htab->elf.sgotplt->output_offset;
4245 relocation = htab->elf.sgot->output_section->vma
4246 + htab->elf.sgot->output_offset + off - g_o_t;
4247 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4248 && tls_type == GOT_TLS_IE_BOTH)
4249 relocation += 4;
4250 if (r_type == R_386_TLS_IE)
4251 relocation += g_o_t;
4252 unresolved_reloc = FALSE;
4253 }
4254 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4255 {
4256 unsigned int val, type;
4257 bfd_vma roff;
4258
4259 /* GD->IE transition. */
4260 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4261 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4262 if (type == 0x04)
4263 {
4264 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4265 Change it into:
4266 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4267 val >>= 3;
4268 roff = rel->r_offset - 3;
4269 }
4270 else
4271 {
4272 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4273 Change it into:
4274 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4275 roff = rel->r_offset - 2;
4276 }
4277 memcpy (contents + roff,
4278 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4279 contents[roff + 7] = 0x80 | (val & 7);
4280 /* If foo is used only with foo@gotntpoff(%reg) and
4281 foo@indntpoff, but not with foo@gottpoff(%reg), change
4282 subl $foo@gottpoff(%reg), %eax
4283 into:
4284 addl $foo@gotntpoff(%reg), %eax. */
4285 if (tls_type == GOT_TLS_IE_POS)
4286 contents[roff + 6] = 0x03;
4287 bfd_put_32 (output_bfd,
4288 htab->elf.sgot->output_section->vma
4289 + htab->elf.sgot->output_offset + off
4290 - htab->elf.sgotplt->output_section->vma
4291 - htab->elf.sgotplt->output_offset,
4292 contents + roff + 8);
4293 /* Skip R_386_PLT32. */
4294 rel++;
4295 continue;
4296 }
4297 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4298 {
4299 /* GDesc -> IE transition.
4300 It's originally something like:
4301 leal x@tlsdesc(%ebx), %eax
4302
4303 Change it to:
4304 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4305 or:
4306 movl x@gottpoff(%ebx), %eax # before negl %eax
4307
4308 Registers other than %eax may be set up here. */
4309
4310 bfd_vma roff;
4311
4312 /* First, make sure it's a leal adding ebx to a 32-bit
4313 offset into any register, although it's probably
4314 almost always going to be eax. */
4315 roff = rel->r_offset;
4316
4317 /* Now modify the instruction as appropriate. */
4318 /* To turn a leal into a movl in the form we use it, it
4319 suffices to change the first byte from 0x8d to 0x8b.
4320 aoliva FIXME: should we decide to keep the leal, all
4321 we have to do is remove the statement below, and
4322 adjust the relaxation of R_386_TLS_DESC_CALL. */
4323 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4324
4325 if (tls_type == GOT_TLS_IE_BOTH)
4326 off += 4;
4327
4328 bfd_put_32 (output_bfd,
4329 htab->elf.sgot->output_section->vma
4330 + htab->elf.sgot->output_offset + off
4331 - htab->elf.sgotplt->output_section->vma
4332 - htab->elf.sgotplt->output_offset,
4333 contents + roff);
4334 continue;
4335 }
4336 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4337 {
4338 /* GDesc -> IE transition.
4339 It's originally:
4340 call *(%eax)
4341
4342 Change it to:
4343 xchg %ax,%ax
4344 or
4345 negl %eax
4346 depending on how we transformed the TLS_GOTDESC above.
4347 */
4348
4349 bfd_vma roff;
4350
4351 roff = rel->r_offset;
4352
4353 /* Now modify the instruction as appropriate. */
4354 if (tls_type != GOT_TLS_IE_NEG)
4355 {
4356 /* xchg %ax,%ax */
4357 bfd_put_8 (output_bfd, 0x66, contents + roff);
4358 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4359 }
4360 else
4361 {
4362 /* negl %eax */
4363 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4364 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4365 }
4366
4367 continue;
4368 }
4369 else
4370 BFD_ASSERT (FALSE);
4371 break;
4372
4373 case R_386_TLS_LDM:
4374 if (! elf_i386_tls_transition (info, input_bfd,
4375 input_section, contents,
4376 symtab_hdr, sym_hashes,
4377 &r_type, GOT_UNKNOWN, rel,
4378 relend, h, r_symndx))
4379 return FALSE;
4380
4381 if (r_type != R_386_TLS_LDM)
4382 {
4383 /* LD->LE transition:
4384 leal foo(%reg), %eax; call ___tls_get_addr.
4385 We change it into:
4386 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4387 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4388 memcpy (contents + rel->r_offset - 2,
4389 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4390 /* Skip R_386_PC32/R_386_PLT32. */
4391 rel++;
4392 continue;
4393 }
4394
4395 if (htab->elf.sgot == NULL)
4396 abort ();
4397
4398 off = htab->tls_ldm_got.offset;
4399 if (off & 1)
4400 off &= ~1;
4401 else
4402 {
4403 Elf_Internal_Rela outrel;
4404
4405 if (htab->elf.srelgot == NULL)
4406 abort ();
4407
4408 outrel.r_offset = (htab->elf.sgot->output_section->vma
4409 + htab->elf.sgot->output_offset + off);
4410
4411 bfd_put_32 (output_bfd, 0,
4412 htab->elf.sgot->contents + off);
4413 bfd_put_32 (output_bfd, 0,
4414 htab->elf.sgot->contents + off + 4);
4415 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4416 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4417 htab->tls_ldm_got.offset |= 1;
4418 }
4419 relocation = htab->elf.sgot->output_section->vma
4420 + htab->elf.sgot->output_offset + off
4421 - htab->elf.sgotplt->output_section->vma
4422 - htab->elf.sgotplt->output_offset;
4423 unresolved_reloc = FALSE;
4424 break;
4425
4426 case R_386_TLS_LDO_32:
4427 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4428 relocation -= elf_i386_dtpoff_base (info);
4429 else
4430 /* When converting LDO to LE, we must negate. */
4431 relocation = -elf_i386_tpoff (info, relocation);
4432 break;
4433
4434 case R_386_TLS_LE_32:
4435 case R_386_TLS_LE:
4436 if (!info->executable)
4437 {
4438 Elf_Internal_Rela outrel;
4439 asection *sreloc;
4440
4441 outrel.r_offset = rel->r_offset
4442 + input_section->output_section->vma
4443 + input_section->output_offset;
4444 if (h != NULL && h->dynindx != -1)
4445 indx = h->dynindx;
4446 else
4447 indx = 0;
4448 if (r_type == R_386_TLS_LE_32)
4449 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4450 else
4451 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4452 sreloc = elf_section_data (input_section)->sreloc;
4453 if (sreloc == NULL)
4454 abort ();
4455 elf_append_rel (output_bfd, sreloc, &outrel);
4456 if (indx)
4457 continue;
4458 else if (r_type == R_386_TLS_LE_32)
4459 relocation = elf_i386_dtpoff_base (info) - relocation;
4460 else
4461 relocation -= elf_i386_dtpoff_base (info);
4462 }
4463 else if (r_type == R_386_TLS_LE_32)
4464 relocation = elf_i386_tpoff (info, relocation);
4465 else
4466 relocation = -elf_i386_tpoff (info, relocation);
4467 break;
4468
4469 default:
4470 break;
4471 }
4472
4473 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4474 because such sections are not SEC_ALLOC and thus ld.so will
4475 not process them. */
4476 if (unresolved_reloc
4477 && !((input_section->flags & SEC_DEBUGGING) != 0
4478 && h->def_dynamic)
4479 && _bfd_elf_section_offset (output_bfd, info, input_section,
4480 rel->r_offset) != (bfd_vma) -1)
4481 {
4482 (*_bfd_error_handler)
4483 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4484 input_bfd,
4485 input_section,
4486 (long) rel->r_offset,
4487 howto->name,
4488 h->root.root.string);
4489 return FALSE;
4490 }
4491
4492 do_relocation:
4493 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4494 contents, rel->r_offset,
4495 relocation, 0);
4496
4497 check_relocation_error:
4498 if (r != bfd_reloc_ok)
4499 {
4500 const char *name;
4501
4502 if (h != NULL)
4503 name = h->root.root.string;
4504 else
4505 {
4506 name = bfd_elf_string_from_elf_section (input_bfd,
4507 symtab_hdr->sh_link,
4508 sym->st_name);
4509 if (name == NULL)
4510 return FALSE;
4511 if (*name == '\0')
4512 name = bfd_section_name (input_bfd, sec);
4513 }
4514
4515 if (r == bfd_reloc_overflow)
4516 {
4517 if (! ((*info->callbacks->reloc_overflow)
4518 (info, (h ? &h->root : NULL), name, howto->name,
4519 (bfd_vma) 0, input_bfd, input_section,
4520 rel->r_offset)))
4521 return FALSE;
4522 }
4523 else
4524 {
4525 (*_bfd_error_handler)
4526 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4527 input_bfd, input_section,
4528 (long) rel->r_offset, name, (int) r);
4529 return FALSE;
4530 }
4531 }
4532 }
4533
4534 return TRUE;
4535 }
4536
4537 /* Finish up dynamic symbol handling. We set the contents of various
4538 dynamic sections here. */
4539
4540 static bfd_boolean
4541 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4542 struct bfd_link_info *info,
4543 struct elf_link_hash_entry *h,
4544 Elf_Internal_Sym *sym)
4545 {
4546 struct elf_i386_link_hash_table *htab;
4547 unsigned plt_entry_size;
4548 const struct elf_i386_backend_data *abed;
4549 struct elf_i386_link_hash_entry *eh;
4550
4551 htab = elf_i386_hash_table (info);
4552 if (htab == NULL)
4553 return FALSE;
4554
4555 abed = get_elf_i386_backend_data (output_bfd);
4556 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4557
4558 eh = (struct elf_i386_link_hash_entry *) h;
4559
4560 if (h->plt.offset != (bfd_vma) -1)
4561 {
4562 bfd_vma plt_index;
4563 bfd_vma got_offset;
4564 Elf_Internal_Rela rel;
4565 bfd_byte *loc;
4566 asection *plt, *gotplt, *relplt;
4567
4568 /* When building a static executable, use .iplt, .igot.plt and
4569 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4570 if (htab->elf.splt != NULL)
4571 {
4572 plt = htab->elf.splt;
4573 gotplt = htab->elf.sgotplt;
4574 relplt = htab->elf.srelplt;
4575 }
4576 else
4577 {
4578 plt = htab->elf.iplt;
4579 gotplt = htab->elf.igotplt;
4580 relplt = htab->elf.irelplt;
4581 }
4582
4583 /* This symbol has an entry in the procedure linkage table. Set
4584 it up. */
4585
4586 if ((h->dynindx == -1
4587 && !((h->forced_local || info->executable)
4588 && h->def_regular
4589 && h->type == STT_GNU_IFUNC))
4590 || plt == NULL
4591 || gotplt == NULL
4592 || relplt == NULL)
4593 abort ();
4594
4595 /* Get the index in the procedure linkage table which
4596 corresponds to this symbol. This is the index of this symbol
4597 in all the symbols for which we are making plt entries. The
4598 first entry in the procedure linkage table is reserved.
4599
4600 Get the offset into the .got table of the entry that
4601 corresponds to this function. Each .got entry is 4 bytes.
4602 The first three are reserved.
4603
4604 For static executables, we don't reserve anything. */
4605
4606 if (plt == htab->elf.splt)
4607 {
4608 got_offset = h->plt.offset / plt_entry_size - 1;
4609 got_offset = (got_offset + 3) * 4;
4610 }
4611 else
4612 {
4613 got_offset = h->plt.offset / plt_entry_size;
4614 got_offset = got_offset * 4;
4615 }
4616
4617 /* Fill in the entry in the procedure linkage table. */
4618 if (! info->shared)
4619 {
4620 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4621 abed->plt->plt_entry_size);
4622 bfd_put_32 (output_bfd,
4623 (gotplt->output_section->vma
4624 + gotplt->output_offset
4625 + got_offset),
4626 plt->contents + h->plt.offset
4627 + abed->plt->plt_got_offset);
4628
4629 if (abed->is_vxworks)
4630 {
4631 int s, k, reloc_index;
4632
4633 /* Create the R_386_32 relocation referencing the GOT
4634 for this PLT entry. */
4635
4636 /* S: Current slot number (zero-based). */
4637 s = ((h->plt.offset - abed->plt->plt_entry_size)
4638 / abed->plt->plt_entry_size);
4639 /* K: Number of relocations for PLTResolve. */
4640 if (info->shared)
4641 k = PLTRESOLVE_RELOCS_SHLIB;
4642 else
4643 k = PLTRESOLVE_RELOCS;
4644 /* Skip the PLTresolve relocations, and the relocations for
4645 the other PLT slots. */
4646 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4647 loc = (htab->srelplt2->contents + reloc_index
4648 * sizeof (Elf32_External_Rel));
4649
4650 rel.r_offset = (htab->elf.splt->output_section->vma
4651 + htab->elf.splt->output_offset
4652 + h->plt.offset + 2),
4653 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4654 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4655
4656 /* Create the R_386_32 relocation referencing the beginning of
4657 the PLT for this GOT entry. */
4658 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4659 + htab->elf.sgotplt->output_offset
4660 + got_offset);
4661 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4662 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4663 loc + sizeof (Elf32_External_Rel));
4664 }
4665 }
4666 else
4667 {
4668 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4669 abed->plt->plt_entry_size);
4670 bfd_put_32 (output_bfd, got_offset,
4671 plt->contents + h->plt.offset
4672 + abed->plt->plt_got_offset);
4673 }
4674
4675 /* Fill in the entry in the global offset table. */
4676 bfd_put_32 (output_bfd,
4677 (plt->output_section->vma
4678 + plt->output_offset
4679 + h->plt.offset
4680 + abed->plt->plt_lazy_offset),
4681 gotplt->contents + got_offset);
4682
4683 /* Fill in the entry in the .rel.plt section. */
4684 rel.r_offset = (gotplt->output_section->vma
4685 + gotplt->output_offset
4686 + got_offset);
4687 if (h->dynindx == -1
4688 || ((info->executable
4689 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4690 && h->def_regular
4691 && h->type == STT_GNU_IFUNC))
4692 {
4693 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4694 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4695 in the .got.plt section. */
4696 bfd_put_32 (output_bfd,
4697 (h->root.u.def.value
4698 + h->root.u.def.section->output_section->vma
4699 + h->root.u.def.section->output_offset),
4700 gotplt->contents + got_offset);
4701 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4702 /* R_386_IRELATIVE comes last. */
4703 plt_index = htab->next_irelative_index--;
4704 }
4705 else
4706 {
4707 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4708 plt_index = htab->next_jump_slot_index++;
4709 }
4710 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4711 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4712
4713 /* Don't fill PLT entry for static executables. */
4714 if (plt == htab->elf.splt)
4715 {
4716 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4717 plt->contents + h->plt.offset
4718 + abed->plt->plt_reloc_offset);
4719 bfd_put_32 (output_bfd, - (h->plt.offset
4720 + abed->plt->plt_plt_offset + 4),
4721 plt->contents + h->plt.offset
4722 + abed->plt->plt_plt_offset);
4723 }
4724 }
4725 else if (eh->plt_got.offset != (bfd_vma) -1)
4726 {
4727 bfd_vma got_offset, plt_offset;
4728 asection *plt, *got, *gotplt;
4729 const bfd_byte *got_plt_entry;
4730
4731 /* Offset of displacement of the indirect jump. */
4732 bfd_vma plt_got_offset = 2;
4733
4734 /* Set the entry in the GOT procedure linkage table. */
4735 plt = htab->plt_got;
4736 got = htab->elf.sgot;
4737 gotplt = htab->elf.sgotplt;
4738 got_offset = h->got.offset;
4739
4740 if (got_offset == (bfd_vma) -1
4741 || plt == NULL
4742 || got == NULL
4743 || gotplt == NULL)
4744 abort ();
4745
4746 /* Fill in the entry in the GOT procedure linkage table. */
4747 if (! info->shared)
4748 {
4749 got_plt_entry = elf_i386_got_plt_entry;
4750 got_offset += got->output_section->vma + got->output_offset;
4751 }
4752 else
4753 {
4754 got_plt_entry = elf_i386_pic_got_plt_entry;
4755 got_offset += (got->output_section->vma
4756 + got->output_offset
4757 - gotplt->output_section->vma
4758 - gotplt->output_offset);
4759 }
4760
4761 plt_offset = eh->plt_got.offset;
4762 memcpy (plt->contents + plt_offset, got_plt_entry,
4763 sizeof (elf_i386_got_plt_entry));
4764 bfd_put_32 (output_bfd, got_offset,
4765 plt->contents + plt_offset + plt_got_offset);
4766 }
4767
4768 if (!h->def_regular
4769 && (h->plt.offset != (bfd_vma) -1
4770 || eh->plt_got.offset != (bfd_vma) -1))
4771 {
4772 /* Mark the symbol as undefined, rather than as defined in
4773 the .plt section. Leave the value if there were any
4774 relocations where pointer equality matters (this is a clue
4775 for the dynamic linker, to make function pointer
4776 comparisons work between an application and shared
4777 library), otherwise set it to zero. If a function is only
4778 called from a binary, there is no need to slow down
4779 shared libraries because of that. */
4780 sym->st_shndx = SHN_UNDEF;
4781 if (!h->pointer_equality_needed)
4782 sym->st_value = 0;
4783 }
4784
4785 if (h->got.offset != (bfd_vma) -1
4786 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4787 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4788 {
4789 Elf_Internal_Rela rel;
4790
4791 /* This symbol has an entry in the global offset table. Set it
4792 up. */
4793
4794 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4795 abort ();
4796
4797 rel.r_offset = (htab->elf.sgot->output_section->vma
4798 + htab->elf.sgot->output_offset
4799 + (h->got.offset & ~(bfd_vma) 1));
4800
4801 /* If this is a static link, or it is a -Bsymbolic link and the
4802 symbol is defined locally or was forced to be local because
4803 of a version file, we just want to emit a RELATIVE reloc.
4804 The entry in the global offset table will already have been
4805 initialized in the relocate_section function. */
4806 if (h->def_regular
4807 && h->type == STT_GNU_IFUNC)
4808 {
4809 if (info->shared)
4810 {
4811 /* Generate R_386_GLOB_DAT. */
4812 goto do_glob_dat;
4813 }
4814 else
4815 {
4816 asection *plt;
4817
4818 if (!h->pointer_equality_needed)
4819 abort ();
4820
4821 /* For non-shared object, we can't use .got.plt, which
4822 contains the real function addres if we need pointer
4823 equality. We load the GOT entry with the PLT entry. */
4824 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4825 bfd_put_32 (output_bfd,
4826 (plt->output_section->vma
4827 + plt->output_offset + h->plt.offset),
4828 htab->elf.sgot->contents + h->got.offset);
4829 return TRUE;
4830 }
4831 }
4832 else if (info->shared
4833 && SYMBOL_REFERENCES_LOCAL (info, h))
4834 {
4835 BFD_ASSERT((h->got.offset & 1) != 0);
4836 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4837 }
4838 else
4839 {
4840 BFD_ASSERT((h->got.offset & 1) == 0);
4841 do_glob_dat:
4842 bfd_put_32 (output_bfd, (bfd_vma) 0,
4843 htab->elf.sgot->contents + h->got.offset);
4844 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4845 }
4846
4847 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
4848 }
4849
4850 if (h->needs_copy)
4851 {
4852 Elf_Internal_Rela rel;
4853
4854 /* This symbol needs a copy reloc. Set it up. */
4855
4856 if (h->dynindx == -1
4857 || (h->root.type != bfd_link_hash_defined
4858 && h->root.type != bfd_link_hash_defweak)
4859 || htab->srelbss == NULL)
4860 abort ();
4861
4862 rel.r_offset = (h->root.u.def.value
4863 + h->root.u.def.section->output_section->vma
4864 + h->root.u.def.section->output_offset);
4865 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4866 elf_append_rel (output_bfd, htab->srelbss, &rel);
4867 }
4868
4869 return TRUE;
4870 }
4871
4872 /* Finish up local dynamic symbol handling. We set the contents of
4873 various dynamic sections here. */
4874
4875 static bfd_boolean
4876 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4877 {
4878 struct elf_link_hash_entry *h
4879 = (struct elf_link_hash_entry *) *slot;
4880 struct bfd_link_info *info
4881 = (struct bfd_link_info *) inf;
4882
4883 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4884 h, NULL);
4885 }
4886
4887 /* Used to decide how to sort relocs in an optimal manner for the
4888 dynamic linker, before writing them out. */
4889
4890 static enum elf_reloc_type_class
4891 elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4892 const asection *rel_sec ATTRIBUTE_UNUSED,
4893 const Elf_Internal_Rela *rela)
4894 {
4895 switch (ELF32_R_TYPE (rela->r_info))
4896 {
4897 case R_386_RELATIVE:
4898 return reloc_class_relative;
4899 case R_386_JUMP_SLOT:
4900 return reloc_class_plt;
4901 case R_386_COPY:
4902 return reloc_class_copy;
4903 default:
4904 return reloc_class_normal;
4905 }
4906 }
4907
4908 /* Finish up the dynamic sections. */
4909
4910 static bfd_boolean
4911 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4912 struct bfd_link_info *info)
4913 {
4914 struct elf_i386_link_hash_table *htab;
4915 bfd *dynobj;
4916 asection *sdyn;
4917 const struct elf_i386_backend_data *abed;
4918
4919 htab = elf_i386_hash_table (info);
4920 if (htab == NULL)
4921 return FALSE;
4922
4923 dynobj = htab->elf.dynobj;
4924 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4925 abed = get_elf_i386_backend_data (output_bfd);
4926
4927 if (htab->elf.dynamic_sections_created)
4928 {
4929 Elf32_External_Dyn *dyncon, *dynconend;
4930
4931 if (sdyn == NULL || htab->elf.sgot == NULL)
4932 abort ();
4933
4934 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4935 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4936 for (; dyncon < dynconend; dyncon++)
4937 {
4938 Elf_Internal_Dyn dyn;
4939 asection *s;
4940
4941 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4942
4943 switch (dyn.d_tag)
4944 {
4945 default:
4946 if (abed->is_vxworks
4947 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4948 break;
4949 continue;
4950
4951 case DT_PLTGOT:
4952 s = htab->elf.sgotplt;
4953 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4954 break;
4955
4956 case DT_JMPREL:
4957 s = htab->elf.srelplt;
4958 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4959 break;
4960
4961 case DT_PLTRELSZ:
4962 s = htab->elf.srelplt;
4963 dyn.d_un.d_val = s->size;
4964 break;
4965
4966 case DT_RELSZ:
4967 /* My reading of the SVR4 ABI indicates that the
4968 procedure linkage table relocs (DT_JMPREL) should be
4969 included in the overall relocs (DT_REL). This is
4970 what Solaris does. However, UnixWare can not handle
4971 that case. Therefore, we override the DT_RELSZ entry
4972 here to make it not include the JMPREL relocs. */
4973 s = htab->elf.srelplt;
4974 if (s == NULL)
4975 continue;
4976 dyn.d_un.d_val -= s->size;
4977 break;
4978
4979 case DT_REL:
4980 /* We may not be using the standard ELF linker script.
4981 If .rel.plt is the first .rel section, we adjust
4982 DT_REL to not include it. */
4983 s = htab->elf.srelplt;
4984 if (s == NULL)
4985 continue;
4986 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4987 continue;
4988 dyn.d_un.d_ptr += s->size;
4989 break;
4990 }
4991
4992 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4993 }
4994
4995 /* Fill in the first entry in the procedure linkage table. */
4996 if (htab->elf.splt && htab->elf.splt->size > 0)
4997 {
4998 if (info->shared)
4999 {
5000 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5001 abed->plt->plt0_entry_size);
5002 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5003 abed->plt0_pad_byte,
5004 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5005 }
5006 else
5007 {
5008 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5009 abed->plt->plt0_entry_size);
5010 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5011 abed->plt0_pad_byte,
5012 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5013 bfd_put_32 (output_bfd,
5014 (htab->elf.sgotplt->output_section->vma
5015 + htab->elf.sgotplt->output_offset
5016 + 4),
5017 htab->elf.splt->contents
5018 + abed->plt->plt0_got1_offset);
5019 bfd_put_32 (output_bfd,
5020 (htab->elf.sgotplt->output_section->vma
5021 + htab->elf.sgotplt->output_offset
5022 + 8),
5023 htab->elf.splt->contents
5024 + abed->plt->plt0_got2_offset);
5025
5026 if (abed->is_vxworks)
5027 {
5028 Elf_Internal_Rela rel;
5029
5030 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5031 On IA32 we use REL relocations so the addend goes in
5032 the PLT directly. */
5033 rel.r_offset = (htab->elf.splt->output_section->vma
5034 + htab->elf.splt->output_offset
5035 + abed->plt->plt0_got1_offset);
5036 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5037 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5038 htab->srelplt2->contents);
5039 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5040 rel.r_offset = (htab->elf.splt->output_section->vma
5041 + htab->elf.splt->output_offset
5042 + abed->plt->plt0_got2_offset);
5043 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5044 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5045 htab->srelplt2->contents +
5046 sizeof (Elf32_External_Rel));
5047 }
5048 }
5049
5050 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5051 really seem like the right value. */
5052 elf_section_data (htab->elf.splt->output_section)
5053 ->this_hdr.sh_entsize = 4;
5054
5055 /* Correct the .rel.plt.unloaded relocations. */
5056 if (abed->is_vxworks && !info->shared)
5057 {
5058 int num_plts = (htab->elf.splt->size
5059 / abed->plt->plt_entry_size) - 1;
5060 unsigned char *p;
5061
5062 p = htab->srelplt2->contents;
5063 if (info->shared)
5064 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5065 else
5066 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5067
5068 for (; num_plts; num_plts--)
5069 {
5070 Elf_Internal_Rela rel;
5071 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5072 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5073 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5074 p += sizeof (Elf32_External_Rel);
5075
5076 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5077 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5078 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5079 p += sizeof (Elf32_External_Rel);
5080 }
5081 }
5082 }
5083 }
5084
5085 if (htab->elf.sgotplt)
5086 {
5087 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5088 {
5089 (*_bfd_error_handler)
5090 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5091 return FALSE;
5092 }
5093
5094 /* Fill in the first three entries in the global offset table. */
5095 if (htab->elf.sgotplt->size > 0)
5096 {
5097 bfd_put_32 (output_bfd,
5098 (sdyn == NULL ? 0
5099 : sdyn->output_section->vma + sdyn->output_offset),
5100 htab->elf.sgotplt->contents);
5101 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5102 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5103 }
5104
5105 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5106 }
5107
5108 /* Adjust .eh_frame for .plt section. */
5109 if (htab->plt_eh_frame != NULL
5110 && htab->plt_eh_frame->contents != NULL)
5111 {
5112 if (htab->elf.splt != NULL
5113 && htab->elf.splt->size != 0
5114 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5115 && htab->elf.splt->output_section != NULL
5116 && htab->plt_eh_frame->output_section != NULL)
5117 {
5118 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5119 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5120 + htab->plt_eh_frame->output_offset
5121 + PLT_FDE_START_OFFSET;
5122 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5123 htab->plt_eh_frame->contents
5124 + PLT_FDE_START_OFFSET);
5125 }
5126 if (htab->plt_eh_frame->sec_info_type
5127 == SEC_INFO_TYPE_EH_FRAME)
5128 {
5129 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5130 htab->plt_eh_frame,
5131 htab->plt_eh_frame->contents))
5132 return FALSE;
5133 }
5134 }
5135
5136 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5137 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5138
5139 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5140 htab_traverse (htab->loc_hash_table,
5141 elf_i386_finish_local_dynamic_symbol,
5142 info);
5143
5144 return TRUE;
5145 }
5146
5147 /* Return address in section PLT for the Ith GOTPLT relocation, for
5148 relocation REL or (bfd_vma) -1 if it should not be included. */
5149
5150 static bfd_vma
5151 elf_i386_plt_sym_val (bfd_vma i, const asection *plt, const arelent *rel)
5152 {
5153 bfd *abfd;
5154 const struct elf_i386_backend_data *bed;
5155 bfd_vma plt_offset;
5156
5157 /* Only match R_386_JUMP_SLOT and R_386_IRELATIVE. */
5158 if (rel->howto->type != R_386_JUMP_SLOT
5159 && rel->howto->type != R_386_IRELATIVE)
5160 return (bfd_vma) -1;
5161
5162 abfd = plt->owner;
5163 bed = get_elf_i386_backend_data (abfd);
5164 plt_offset = bed->plt->plt_entry_size;
5165
5166 if (elf_elfheader (abfd)->e_ident[EI_OSABI] != ELFOSABI_GNU)
5167 return plt->vma + (i + 1) * plt_offset;
5168
5169 while (plt_offset < plt->size)
5170 {
5171 bfd_vma reloc_offset;
5172 bfd_byte reloc_offset_raw[4];
5173
5174 if (!bfd_get_section_contents (abfd, (asection *) plt,
5175 reloc_offset_raw,
5176 plt_offset + bed->plt->plt_reloc_offset,
5177 sizeof (reloc_offset_raw)))
5178 return (bfd_vma) -1;
5179
5180 reloc_offset = H_GET_32 (abfd, reloc_offset_raw);
5181 if (reloc_offset == i * sizeof (Elf32_External_Rel))
5182 return plt->vma + plt_offset;
5183 plt_offset += bed->plt->plt_entry_size;
5184 }
5185
5186 abort ();
5187 }
5188
5189 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5190
5191 static bfd_boolean
5192 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5193 {
5194 if (h->plt.offset != (bfd_vma) -1
5195 && !h->def_regular
5196 && !h->pointer_equality_needed)
5197 return FALSE;
5198
5199 return _bfd_elf_hash_symbol (h);
5200 }
5201
5202 /* Hook called by the linker routine which adds symbols from an object
5203 file. */
5204
5205 static bfd_boolean
5206 elf_i386_add_symbol_hook (bfd * abfd,
5207 struct bfd_link_info * info,
5208 Elf_Internal_Sym * sym,
5209 const char ** namep ATTRIBUTE_UNUSED,
5210 flagword * flagsp ATTRIBUTE_UNUSED,
5211 asection ** secp ATTRIBUTE_UNUSED,
5212 bfd_vma * valp ATTRIBUTE_UNUSED)
5213 {
5214 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5215 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
5216 && (abfd->flags & DYNAMIC) == 0
5217 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
5218 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
5219
5220 return TRUE;
5221 }
5222
5223 #define TARGET_LITTLE_SYM i386_elf32_vec
5224 #define TARGET_LITTLE_NAME "elf32-i386"
5225 #define ELF_ARCH bfd_arch_i386
5226 #define ELF_TARGET_ID I386_ELF_DATA
5227 #define ELF_MACHINE_CODE EM_386
5228 #define ELF_MAXPAGESIZE 0x1000
5229
5230 #define elf_backend_can_gc_sections 1
5231 #define elf_backend_can_refcount 1
5232 #define elf_backend_want_got_plt 1
5233 #define elf_backend_plt_readonly 1
5234 #define elf_backend_want_plt_sym 0
5235 #define elf_backend_got_header_size 12
5236 #define elf_backend_plt_alignment 4
5237
5238 /* Support RELA for objdump of prelink objects. */
5239 #define elf_info_to_howto elf_i386_info_to_howto_rel
5240 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5241
5242 #define bfd_elf32_mkobject elf_i386_mkobject
5243
5244 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5245 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5246 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5247 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5248
5249 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5250 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5251 #define elf_backend_check_relocs elf_i386_check_relocs
5252 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5253 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5254 #define elf_backend_fake_sections elf_i386_fake_sections
5255 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5256 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5257 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5258 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5259 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5260 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5261 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5262 #define elf_backend_relocate_section elf_i386_relocate_section
5263 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5264 #define elf_backend_always_size_sections elf_i386_always_size_sections
5265 #define elf_backend_omit_section_dynsym \
5266 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5267 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5268 #define elf_backend_hash_symbol elf_i386_hash_symbol
5269 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5270
5271 #include "elf32-target.h"
5272
5273 /* FreeBSD support. */
5274
5275 #undef TARGET_LITTLE_SYM
5276 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5277 #undef TARGET_LITTLE_NAME
5278 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5279 #undef ELF_OSABI
5280 #define ELF_OSABI ELFOSABI_FREEBSD
5281
5282 /* The kernel recognizes executables as valid only if they carry a
5283 "FreeBSD" label in the ELF header. So we put this label on all
5284 executables and (for simplicity) also all other object files. */
5285
5286 static void
5287 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5288 {
5289 _bfd_elf_post_process_headers (abfd, info);
5290
5291 #ifdef OLD_FREEBSD_ABI_LABEL
5292 {
5293 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5294 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5295 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5296 }
5297 #endif
5298 }
5299
5300 #undef elf_backend_post_process_headers
5301 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5302 #undef elf32_bed
5303 #define elf32_bed elf32_i386_fbsd_bed
5304
5305 #undef elf_backend_add_symbol_hook
5306
5307 #include "elf32-target.h"
5308
5309 /* Solaris 2. */
5310
5311 #undef TARGET_LITTLE_SYM
5312 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5313 #undef TARGET_LITTLE_NAME
5314 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5315
5316 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5317 objects won't be recognized. */
5318 #undef ELF_OSABI
5319
5320 #undef elf32_bed
5321 #define elf32_bed elf32_i386_sol2_bed
5322
5323 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5324 boundary. */
5325 #undef elf_backend_static_tls_alignment
5326 #define elf_backend_static_tls_alignment 8
5327
5328 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5329
5330 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5331 File, p.63. */
5332 #undef elf_backend_want_plt_sym
5333 #define elf_backend_want_plt_sym 1
5334
5335 #include "elf32-target.h"
5336
5337 /* Native Client support. */
5338
5339 #undef TARGET_LITTLE_SYM
5340 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5341 #undef TARGET_LITTLE_NAME
5342 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5343 #undef elf32_bed
5344 #define elf32_bed elf32_i386_nacl_bed
5345
5346 #undef ELF_MAXPAGESIZE
5347 #define ELF_MAXPAGESIZE 0x10000
5348
5349 /* Restore defaults. */
5350 #undef ELF_OSABI
5351 #undef elf_backend_want_plt_sym
5352 #define elf_backend_want_plt_sym 0
5353 #undef elf_backend_post_process_headers
5354 #undef elf_backend_static_tls_alignment
5355
5356 /* NaCl uses substantially different PLT entries for the same effects. */
5357
5358 #undef elf_backend_plt_alignment
5359 #define elf_backend_plt_alignment 5
5360 #define NACL_PLT_ENTRY_SIZE 64
5361 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5362
5363 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5364 {
5365 0xff, 0x35, /* pushl contents of address */
5366 0, 0, 0, 0, /* replaced with address of .got + 4. */
5367 0x8b, 0x0d, /* movl contents of address, %ecx */
5368 0, 0, 0, 0, /* replaced with address of .got + 8. */
5369 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5370 0xff, 0xe1 /* jmp *%ecx */
5371 };
5372
5373 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5374 {
5375 0x8b, 0x0d, /* movl contents of address, %ecx */
5376 0, 0, 0, 0, /* replaced with GOT slot address. */
5377 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5378 0xff, 0xe1, /* jmp *%ecx */
5379
5380 /* Pad to the next 32-byte boundary with nop instructions. */
5381 0x90,
5382 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5383 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5384
5385 /* Lazy GOT entries point here (32-byte aligned). */
5386 0x68, /* pushl immediate */
5387 0, 0, 0, 0, /* replaced with reloc offset. */
5388 0xe9, /* jmp relative */
5389 0, 0, 0, 0, /* replaced with offset to .plt. */
5390
5391 /* Pad to the next 32-byte boundary with nop instructions. */
5392 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5393 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5394 0x90, 0x90
5395 };
5396
5397 static const bfd_byte
5398 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5399 {
5400 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5401 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5402 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5403 0xff, 0xe1, /* jmp *%ecx */
5404
5405 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5406 so pad to that size with nop instructions. */
5407 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5408 };
5409
5410 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5411 {
5412 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5413 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5414 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5415 0xff, 0xe1, /* jmp *%ecx */
5416
5417 /* Pad to the next 32-byte boundary with nop instructions. */
5418 0x90,
5419 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5420 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5421
5422 /* Lazy GOT entries point here (32-byte aligned). */
5423 0x68, /* pushl immediate */
5424 0, 0, 0, 0, /* replaced with offset into relocation table. */
5425 0xe9, /* jmp relative */
5426 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5427
5428 /* Pad to the next 32-byte boundary with nop instructions. */
5429 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5430 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5431 0x90, 0x90
5432 };
5433
5434 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5435 {
5436 #if (PLT_CIE_LENGTH != 20 \
5437 || PLT_FDE_LENGTH != 36 \
5438 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5439 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5440 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5441 #endif
5442 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5443 0, 0, 0, 0, /* CIE ID */
5444 1, /* CIE version */
5445 'z', 'R', 0, /* Augmentation string */
5446 1, /* Code alignment factor */
5447 0x7c, /* Data alignment factor: -4 */
5448 8, /* Return address column */
5449 1, /* Augmentation size */
5450 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5451 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5452 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5453 DW_CFA_nop, DW_CFA_nop,
5454
5455 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5456 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5457 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5458 0, 0, 0, 0, /* .plt size goes here */
5459 0, /* Augmentation size */
5460 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5461 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5462 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5463 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5464 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5465 13, /* Block length */
5466 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5467 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5468 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5469 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5470 DW_CFA_nop, DW_CFA_nop
5471 };
5472
5473 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5474 {
5475 elf_i386_nacl_plt0_entry, /* plt0_entry */
5476 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5477 2, /* plt0_got1_offset */
5478 8, /* plt0_got2_offset */
5479 elf_i386_nacl_plt_entry, /* plt_entry */
5480 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5481 2, /* plt_got_offset */
5482 33, /* plt_reloc_offset */
5483 38, /* plt_plt_offset */
5484 32, /* plt_lazy_offset */
5485 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5486 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5487 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5488 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5489 };
5490
5491 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5492 {
5493 &elf_i386_nacl_plt, /* plt */
5494 0x90, /* plt0_pad_byte: nop insn */
5495 0, /* is_vxworks */
5496 };
5497
5498 static bfd_boolean
5499 elf32_i386_nacl_elf_object_p (bfd *abfd)
5500 {
5501 /* Set the right machine number for a NaCl i386 ELF32 file. */
5502 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5503 return TRUE;
5504 }
5505
5506 #undef elf_backend_arch_data
5507 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5508
5509 #undef elf_backend_object_p
5510 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5511 #undef elf_backend_modify_segment_map
5512 #define elf_backend_modify_segment_map nacl_modify_segment_map
5513 #undef elf_backend_modify_program_headers
5514 #define elf_backend_modify_program_headers nacl_modify_program_headers
5515 #undef elf_backend_final_write_processing
5516 #define elf_backend_final_write_processing nacl_final_write_processing
5517
5518 #include "elf32-target.h"
5519
5520 /* Restore defaults. */
5521 #undef elf_backend_object_p
5522 #undef elf_backend_modify_segment_map
5523 #undef elf_backend_modify_program_headers
5524 #undef elf_backend_final_write_processing
5525
5526 /* VxWorks support. */
5527
5528 #undef TARGET_LITTLE_SYM
5529 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5530 #undef TARGET_LITTLE_NAME
5531 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5532 #undef ELF_OSABI
5533 #undef elf_backend_plt_alignment
5534 #define elf_backend_plt_alignment 4
5535
5536 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5537 {
5538 &elf_i386_plt, /* plt */
5539 0x90, /* plt0_pad_byte */
5540 1, /* is_vxworks */
5541 };
5542
5543 #undef elf_backend_arch_data
5544 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5545
5546 #undef elf_backend_relocs_compatible
5547 #undef elf_backend_add_symbol_hook
5548 #define elf_backend_add_symbol_hook \
5549 elf_vxworks_add_symbol_hook
5550 #undef elf_backend_link_output_symbol_hook
5551 #define elf_backend_link_output_symbol_hook \
5552 elf_vxworks_link_output_symbol_hook
5553 #undef elf_backend_emit_relocs
5554 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5555 #undef elf_backend_final_write_processing
5556 #define elf_backend_final_write_processing \
5557 elf_vxworks_final_write_processing
5558 #undef elf_backend_static_tls_alignment
5559
5560 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5561 define it. */
5562 #undef elf_backend_want_plt_sym
5563 #define elf_backend_want_plt_sym 1
5564
5565 #undef elf32_bed
5566 #define elf32_bed elf32_i386_vxworks_bed
5567
5568 #include "elf32-target.h"
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