projects / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
Cleanup value_fetch_lazy's comment and return value
[binutils-gdb.git] / bfd / elf32-i386.c
1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "bfdlink.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf-nacl.h"
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
29 #include "objalloc.h"
30 #include "hashtab.h"
31 #include "dwarf2.h"
32
33 /* 386 uses REL relocations instead of RELA. */
34 #define USE_REL 1
35
36 #include "elf/i386.h"
37
38 static reloc_howto_type elf_howto_table[]=
39 {
40 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
41 bfd_elf_generic_reloc, "R_386_NONE",
42 TRUE, 0x00000000, 0x00000000, FALSE),
43 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_32",
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_PC32",
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_GOT32",
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_PLT32",
54 TRUE, 0xffffffff, 0xffffffff, TRUE),
55 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_COPY",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_RELATIVE",
66 TRUE, 0xffffffff, 0xffffffff, FALSE),
67 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_386_GOTOFF",
69 TRUE, 0xffffffff, 0xffffffff, FALSE),
70 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_386_GOTPC",
72 TRUE, 0xffffffff, 0xffffffff, TRUE),
73
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
78 #define R_386_standard (R_386_GOTPC + 1)
79 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
80
81 /* These relocs are a GNU extension. */
82 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_IE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_LE",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_TLS_GD",
96 TRUE, 0xffffffff, 0xffffffff, FALSE),
97 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_TLS_LDM",
99 TRUE, 0xffffffff, 0xffffffff, FALSE),
100 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_16",
102 TRUE, 0xffff, 0xffff, FALSE),
103 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_386_PC16",
105 TRUE, 0xffff, 0xffff, TRUE),
106 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_386_8",
108 TRUE, 0xff, 0xff, FALSE),
109 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
110 bfd_elf_generic_reloc, "R_386_PC8",
111 TRUE, 0xff, 0xff, TRUE),
112
113 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
115 /* These are common with Solaris TLS implementation. */
116 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
135 bfd_elf_generic_reloc, "R_386_SIZE32",
136 TRUE, 0xffffffff, 0xffffffff, FALSE),
137 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
142 FALSE, 0, 0, FALSE),
143 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_TLS_DESC",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
146 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_386_IRELATIVE",
148 TRUE, 0xffffffff, 0xffffffff, FALSE),
149
150 /* Another gap. */
151 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
153
154 /* GNU extension to record C++ vtable hierarchy. */
155 HOWTO (R_386_GNU_VTINHERIT, /* type */
156 0, /* rightshift */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
158 0, /* bitsize */
159 FALSE, /* pc_relative */
160 0, /* bitpos */
161 complain_overflow_dont, /* complain_on_overflow */
162 NULL, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
164 FALSE, /* partial_inplace */
165 0, /* src_mask */
166 0, /* dst_mask */
167 FALSE), /* pcrel_offset */
168
169 /* GNU extension to record C++ vtable member usage. */
170 HOWTO (R_386_GNU_VTENTRY, /* type */
171 0, /* rightshift */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
173 0, /* bitsize */
174 FALSE, /* pc_relative */
175 0, /* bitpos */
176 complain_overflow_dont, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
179 FALSE, /* partial_inplace */
180 0, /* src_mask */
181 0, /* dst_mask */
182 FALSE) /* pcrel_offset */
183
184 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
185
186 };
187
188 #ifdef DEBUG_GEN_RELOC
189 #define TRACE(str) \
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
191 #else
192 #define TRACE(str)
193 #endif
194
195 static reloc_howto_type *
196 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
197 bfd_reloc_code_real_type code)
198 {
199 switch (code)
200 {
201 case BFD_RELOC_NONE:
202 TRACE ("BFD_RELOC_NONE");
203 return &elf_howto_table[R_386_NONE];
204
205 case BFD_RELOC_32:
206 TRACE ("BFD_RELOC_32");
207 return &elf_howto_table[R_386_32];
208
209 case BFD_RELOC_CTOR:
210 TRACE ("BFD_RELOC_CTOR");
211 return &elf_howto_table[R_386_32];
212
213 case BFD_RELOC_32_PCREL:
214 TRACE ("BFD_RELOC_PC32");
215 return &elf_howto_table[R_386_PC32];
216
217 case BFD_RELOC_386_GOT32:
218 TRACE ("BFD_RELOC_386_GOT32");
219 return &elf_howto_table[R_386_GOT32];
220
221 case BFD_RELOC_386_PLT32:
222 TRACE ("BFD_RELOC_386_PLT32");
223 return &elf_howto_table[R_386_PLT32];
224
225 case BFD_RELOC_386_COPY:
226 TRACE ("BFD_RELOC_386_COPY");
227 return &elf_howto_table[R_386_COPY];
228
229 case BFD_RELOC_386_GLOB_DAT:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
231 return &elf_howto_table[R_386_GLOB_DAT];
232
233 case BFD_RELOC_386_JUMP_SLOT:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
235 return &elf_howto_table[R_386_JUMP_SLOT];
236
237 case BFD_RELOC_386_RELATIVE:
238 TRACE ("BFD_RELOC_386_RELATIVE");
239 return &elf_howto_table[R_386_RELATIVE];
240
241 case BFD_RELOC_386_GOTOFF:
242 TRACE ("BFD_RELOC_386_GOTOFF");
243 return &elf_howto_table[R_386_GOTOFF];
244
245 case BFD_RELOC_386_GOTPC:
246 TRACE ("BFD_RELOC_386_GOTPC");
247 return &elf_howto_table[R_386_GOTPC];
248
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
252 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
253
254 case BFD_RELOC_386_TLS_IE:
255 TRACE ("BFD_RELOC_386_TLS_IE");
256 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
257
258 case BFD_RELOC_386_TLS_GOTIE:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
260 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
261
262 case BFD_RELOC_386_TLS_LE:
263 TRACE ("BFD_RELOC_386_TLS_LE");
264 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
265
266 case BFD_RELOC_386_TLS_GD:
267 TRACE ("BFD_RELOC_386_TLS_GD");
268 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
269
270 case BFD_RELOC_386_TLS_LDM:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
272 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
273
274 case BFD_RELOC_16:
275 TRACE ("BFD_RELOC_16");
276 return &elf_howto_table[R_386_16 - R_386_ext_offset];
277
278 case BFD_RELOC_16_PCREL:
279 TRACE ("BFD_RELOC_16_PCREL");
280 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
281
282 case BFD_RELOC_8:
283 TRACE ("BFD_RELOC_8");
284 return &elf_howto_table[R_386_8 - R_386_ext_offset];
285
286 case BFD_RELOC_8_PCREL:
287 TRACE ("BFD_RELOC_8_PCREL");
288 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
289
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
293 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
294
295 case BFD_RELOC_386_TLS_IE_32:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
297 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
298
299 case BFD_RELOC_386_TLS_LE_32:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
301 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
302
303 case BFD_RELOC_386_TLS_DTPMOD32:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
305 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
306
307 case BFD_RELOC_386_TLS_DTPOFF32:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
309 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
310
311 case BFD_RELOC_386_TLS_TPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
313 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
314
315 case BFD_RELOC_SIZE32:
316 TRACE ("BFD_RELOC_SIZE32");
317 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
318
319 case BFD_RELOC_386_TLS_GOTDESC:
320 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
321 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
322
323 case BFD_RELOC_386_TLS_DESC_CALL:
324 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
325 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
326
327 case BFD_RELOC_386_TLS_DESC:
328 TRACE ("BFD_RELOC_386_TLS_DESC");
329 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
330
331 case BFD_RELOC_386_IRELATIVE:
332 TRACE ("BFD_RELOC_386_IRELATIVE");
333 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
334
335 case BFD_RELOC_VTABLE_INHERIT:
336 TRACE ("BFD_RELOC_VTABLE_INHERIT");
337 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
338
339 case BFD_RELOC_VTABLE_ENTRY:
340 TRACE ("BFD_RELOC_VTABLE_ENTRY");
341 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
342
343 default:
344 break;
345 }
346
347 TRACE ("Unknown");
348 return 0;
349 }
350
351 static reloc_howto_type *
352 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
353 const char *r_name)
354 {
355 unsigned int i;
356
357 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
358 if (elf_howto_table[i].name != NULL
359 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
360 return &elf_howto_table[i];
361
362 return NULL;
363 }
364
365 static reloc_howto_type *
366 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
367 {
368 unsigned int indx;
369
370 if ((indx = r_type) >= R_386_standard
371 && ((indx = r_type - R_386_ext_offset) - R_386_standard
372 >= R_386_ext - R_386_standard)
373 && ((indx = r_type - R_386_tls_offset) - R_386_ext
374 >= R_386_irelative - R_386_ext)
375 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
376 >= R_386_vt - R_386_irelative))
377 {
378 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
379 abfd, (int) r_type);
380 indx = R_386_NONE;
381 }
382 /* PR 17512: file: 0f67f69d. */
383 if (elf_howto_table [indx].type != r_type)
384 return NULL;
385 return &elf_howto_table[indx];
386 }
387
388 static void
389 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
390 arelent *cache_ptr,
391 Elf_Internal_Rela *dst)
392 {
393 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
394 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
395 }
396
397 /* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
402
403 static bfd_boolean
404 elf_i386_is_local_label_name (bfd *abfd, const char *name)
405 {
406 if (name[0] == '.' && name[1] == 'X')
407 return TRUE;
408
409 return _bfd_elf_is_local_label_name (abfd, name);
410 }
411 \f
412 /* Support for core dump NOTE sections. */
413
414 static bfd_boolean
415 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
416 {
417 int offset;
418 size_t size;
419
420 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
421 {
422 int pr_version = bfd_get_32 (abfd, note->descdata);
423
424 if (pr_version != 1)
425 return FALSE;
426
427 /* pr_cursig */
428 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
429
430 /* pr_pid */
431 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
432
433 /* pr_reg */
434 offset = 28;
435 size = bfd_get_32 (abfd, note->descdata + 8);
436 }
437 else
438 {
439 switch (note->descsz)
440 {
441 default:
442 return FALSE;
443
444 case 144: /* Linux/i386 */
445 /* pr_cursig */
446 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
447
448 /* pr_pid */
449 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
450
451 /* pr_reg */
452 offset = 72;
453 size = 68;
454
455 break;
456 }
457 }
458
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
461 size, note->descpos + offset);
462 }
463
464 static bfd_boolean
465 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
466 {
467 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
468 {
469 int pr_version = bfd_get_32 (abfd, note->descdata);
470
471 if (pr_version != 1)
472 return FALSE;
473
474 elf_tdata (abfd)->core->program
475 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
476 elf_tdata (abfd)->core->command
477 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
478 }
479 else
480 {
481 switch (note->descsz)
482 {
483 default:
484 return FALSE;
485
486 case 124: /* Linux/i386 elf_prpsinfo. */
487 elf_tdata (abfd)->core->pid
488 = bfd_get_32 (abfd, note->descdata + 12);
489 elf_tdata (abfd)->core->program
490 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
491 elf_tdata (abfd)->core->command
492 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
493 }
494 }
495
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
499 {
500 char *command = elf_tdata (abfd)->core->command;
501 int n = strlen (command);
502
503 if (0 < n && command[n - 1] == ' ')
504 command[n - 1] = '\0';
505 }
506
507 return TRUE;
508 }
509 \f
510 /* Functions for the i386 ELF linker.
511
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
514 following:
515
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
522
523
524 /* The name of the dynamic interpreter. This is put in the .interp
525 section. */
526
527 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
528
529 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
532 shared lib. */
533 #define ELIMINATE_COPY_RELOCS 1
534
535 /* The size in bytes of an entry in the procedure linkage table. */
536
537 #define PLT_ENTRY_SIZE 16
538
539 /* The first entry in an absolute procedure linkage table looks like
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
542
543 static const bfd_byte elf_i386_plt0_entry[12] =
544 {
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0 /* replaced with address of .got + 8. */
549 };
550
551 /* Subsequent entries in an absolute procedure linkage table look like
552 this. */
553
554 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
555 {
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
562 };
563
564 /* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
566
567 static const bfd_byte elf_i386_pic_plt0_entry[12] =
568 {
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
571 };
572
573 /* Subsequent entries in a PIC procedure linkage table look like this. */
574
575 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
576 {
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
583 };
584
585 /* Entries in the GOT procedure linkage table look like this. */
586
587 static const bfd_byte elf_i386_got_plt_entry[8] =
588 {
589 0xff, 0x25, /* jmp indirect */
590 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
591 0x66, 0x90 /* xchg %ax,%ax */
592 };
593
594 /* Entries in the PIC GOT procedure linkage table look like this. */
595
596 static const bfd_byte elf_i386_pic_got_plt_entry[8] =
597 {
598 0xff, 0xa3, /* jmp *offset(%ebx) */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
601 };
602
603 /* .eh_frame covering the .plt section. */
604
605 static const bfd_byte elf_i386_eh_frame_plt[] =
606 {
607 #define PLT_CIE_LENGTH 20
608 #define PLT_FDE_LENGTH 36
609 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
610 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
611 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
612 0, 0, 0, 0, /* CIE ID */
613 1, /* CIE version */
614 'z', 'R', 0, /* Augmentation string */
615 1, /* Code alignment factor */
616 0x7c, /* Data alignment factor */
617 8, /* Return address column */
618 1, /* Augmentation size */
619 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
620 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
621 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
622 DW_CFA_nop, DW_CFA_nop,
623
624 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
625 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
626 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
627 0, 0, 0, 0, /* .plt size goes here */
628 0, /* Augmentation size */
629 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
630 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
631 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
632 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
633 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
634 11, /* Block length */
635 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
636 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
637 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
638 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
639 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
640 };
641
642 struct elf_i386_plt_layout
643 {
644 /* The first entry in an absolute procedure linkage table looks like this. */
645 const bfd_byte *plt0_entry;
646 unsigned int plt0_entry_size;
647
648 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
649 unsigned int plt0_got1_offset;
650 unsigned int plt0_got2_offset;
651
652 /* Later entries in an absolute procedure linkage table look like this. */
653 const bfd_byte *plt_entry;
654 unsigned int plt_entry_size;
655
656 /* Offsets into plt_entry that are to be replaced with... */
657 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
658 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
659 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
660
661 /* Offset into plt_entry where the initial value of the GOT entry points. */
662 unsigned int plt_lazy_offset;
663
664 /* The first entry in a PIC procedure linkage table looks like this. */
665 const bfd_byte *pic_plt0_entry;
666
667 /* Subsequent entries in a PIC procedure linkage table look like this. */
668 const bfd_byte *pic_plt_entry;
669
670 /* .eh_frame covering the .plt section. */
671 const bfd_byte *eh_frame_plt;
672 unsigned int eh_frame_plt_size;
673 };
674
675 #define GET_PLT_ENTRY_SIZE(abfd) \
676 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
677
678 /* These are the standard parameters. */
679 static const struct elf_i386_plt_layout elf_i386_plt =
680 {
681 elf_i386_plt0_entry, /* plt0_entry */
682 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
683 2, /* plt0_got1_offset */
684 8, /* plt0_got2_offset */
685 elf_i386_plt_entry, /* plt_entry */
686 PLT_ENTRY_SIZE, /* plt_entry_size */
687 2, /* plt_got_offset */
688 7, /* plt_reloc_offset */
689 12, /* plt_plt_offset */
690 6, /* plt_lazy_offset */
691 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
692 elf_i386_pic_plt_entry, /* pic_plt_entry */
693 elf_i386_eh_frame_plt, /* eh_frame_plt */
694 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
695 };
696 \f
697
698 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
699 for the PLTResolve stub and then for each PLT entry. */
700 #define PLTRESOLVE_RELOCS_SHLIB 0
701 #define PLTRESOLVE_RELOCS 2
702 #define PLT_NON_JUMP_SLOT_RELOCS 2
703
704 /* Architecture-specific backend data for i386. */
705
706 struct elf_i386_backend_data
707 {
708 /* Parameters describing PLT generation. */
709 const struct elf_i386_plt_layout *plt;
710
711 /* Value used to fill the unused bytes of the first PLT entry. */
712 bfd_byte plt0_pad_byte;
713
714 /* True if the target system is VxWorks. */
715 int is_vxworks;
716 };
717
718 #define get_elf_i386_backend_data(abfd) \
719 ((const struct elf_i386_backend_data *) \
720 get_elf_backend_data (abfd)->arch_data)
721
722 /* These are the standard parameters. */
723 static const struct elf_i386_backend_data elf_i386_arch_bed =
724 {
725 &elf_i386_plt, /* plt */
726 0, /* plt0_pad_byte */
727 0, /* is_vxworks */
728 };
729
730 #define elf_backend_arch_data &elf_i386_arch_bed
731
732 /* i386 ELF linker hash entry. */
733
734 struct elf_i386_link_hash_entry
735 {
736 struct elf_link_hash_entry elf;
737
738 /* Track dynamic relocs copied for this symbol. */
739 struct elf_dyn_relocs *dyn_relocs;
740
741 #define GOT_UNKNOWN 0
742 #define GOT_NORMAL 1
743 #define GOT_TLS_GD 2
744 #define GOT_TLS_IE 4
745 #define GOT_TLS_IE_POS 5
746 #define GOT_TLS_IE_NEG 6
747 #define GOT_TLS_IE_BOTH 7
748 #define GOT_TLS_GDESC 8
749 #define GOT_TLS_GD_BOTH_P(type) \
750 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
751 #define GOT_TLS_GD_P(type) \
752 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
753 #define GOT_TLS_GDESC_P(type) \
754 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
755 #define GOT_TLS_GD_ANY_P(type) \
756 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
757 unsigned char tls_type;
758
759 /* Symbol is referenced by R_386_GOTOFF relocation. */
760 unsigned int gotoff_ref : 1;
761
762 /* Information about the GOT PLT entry. Filled when there are both
763 GOT and PLT relocations against the same function. */
764 union gotplt_union plt_got;
765
766 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
767 starting at the end of the jump table. */
768 bfd_vma tlsdesc_got;
769 };
770
771 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
772
773 struct elf_i386_obj_tdata
774 {
775 struct elf_obj_tdata root;
776
777 /* tls_type for each local got entry. */
778 char *local_got_tls_type;
779
780 /* GOTPLT entries for TLS descriptors. */
781 bfd_vma *local_tlsdesc_gotent;
782 };
783
784 #define elf_i386_tdata(abfd) \
785 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
786
787 #define elf_i386_local_got_tls_type(abfd) \
788 (elf_i386_tdata (abfd)->local_got_tls_type)
789
790 #define elf_i386_local_tlsdesc_gotent(abfd) \
791 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
792
793 #define is_i386_elf(bfd) \
794 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
795 && elf_tdata (bfd) != NULL \
796 && elf_object_id (bfd) == I386_ELF_DATA)
797
798 static bfd_boolean
799 elf_i386_mkobject (bfd *abfd)
800 {
801 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
802 I386_ELF_DATA);
803 }
804
805 /* i386 ELF linker hash table. */
806
807 struct elf_i386_link_hash_table
808 {
809 struct elf_link_hash_table elf;
810
811 /* Short-cuts to get to dynamic linker sections. */
812 asection *sdynbss;
813 asection *srelbss;
814 asection *plt_eh_frame;
815 asection *plt_got;
816
817 union
818 {
819 bfd_signed_vma refcount;
820 bfd_vma offset;
821 } tls_ldm_got;
822
823 /* The amount of space used by the reserved portion of the sgotplt
824 section, plus whatever space is used by the jump slots. */
825 bfd_vma sgotplt_jump_table_size;
826
827 /* Small local sym cache. */
828 struct sym_cache sym_cache;
829
830 /* _TLS_MODULE_BASE_ symbol. */
831 struct bfd_link_hash_entry *tls_module_base;
832
833 /* Used by local STT_GNU_IFUNC symbols. */
834 htab_t loc_hash_table;
835 void * loc_hash_memory;
836
837 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
838 asection *srelplt2;
839
840 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
841 bfd_vma next_tls_desc_index;
842
843 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
844 bfd_vma next_jump_slot_index;
845
846 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
847 bfd_vma next_irelative_index;
848 };
849
850 /* Get the i386 ELF linker hash table from a link_info structure. */
851
852 #define elf_i386_hash_table(p) \
853 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
854 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
855
856 #define elf_i386_compute_jump_table_size(htab) \
857 ((htab)->elf.srelplt->reloc_count * 4)
858
859 /* Create an entry in an i386 ELF linker hash table. */
860
861 static struct bfd_hash_entry *
862 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
863 struct bfd_hash_table *table,
864 const char *string)
865 {
866 /* Allocate the structure if it has not already been allocated by a
867 subclass. */
868 if (entry == NULL)
869 {
870 entry = (struct bfd_hash_entry *)
871 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
872 if (entry == NULL)
873 return entry;
874 }
875
876 /* Call the allocation method of the superclass. */
877 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
878 if (entry != NULL)
879 {
880 struct elf_i386_link_hash_entry *eh;
881
882 eh = (struct elf_i386_link_hash_entry *) entry;
883 eh->dyn_relocs = NULL;
884 eh->tls_type = GOT_UNKNOWN;
885 eh->gotoff_ref = 0;
886 eh->plt_got.offset = (bfd_vma) -1;
887 eh->tlsdesc_got = (bfd_vma) -1;
888 }
889
890 return entry;
891 }
892
893 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
894 for local symbol so that we can handle local STT_GNU_IFUNC symbols
895 as global symbol. We reuse indx and dynstr_index for local symbol
896 hash since they aren't used by global symbols in this backend. */
897
898 static hashval_t
899 elf_i386_local_htab_hash (const void *ptr)
900 {
901 struct elf_link_hash_entry *h
902 = (struct elf_link_hash_entry *) ptr;
903 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
904 }
905
906 /* Compare local hash entries. */
907
908 static int
909 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
910 {
911 struct elf_link_hash_entry *h1
912 = (struct elf_link_hash_entry *) ptr1;
913 struct elf_link_hash_entry *h2
914 = (struct elf_link_hash_entry *) ptr2;
915
916 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
917 }
918
919 /* Find and/or create a hash entry for local symbol. */
920
921 static struct elf_link_hash_entry *
922 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
923 bfd *abfd, const Elf_Internal_Rela *rel,
924 bfd_boolean create)
925 {
926 struct elf_i386_link_hash_entry e, *ret;
927 asection *sec = abfd->sections;
928 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
929 ELF32_R_SYM (rel->r_info));
930 void **slot;
931
932 e.elf.indx = sec->id;
933 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
934 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
935 create ? INSERT : NO_INSERT);
936
937 if (!slot)
938 return NULL;
939
940 if (*slot)
941 {
942 ret = (struct elf_i386_link_hash_entry *) *slot;
943 return &ret->elf;
944 }
945
946 ret = (struct elf_i386_link_hash_entry *)
947 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
948 sizeof (struct elf_i386_link_hash_entry));
949 if (ret)
950 {
951 memset (ret, 0, sizeof (*ret));
952 ret->elf.indx = sec->id;
953 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
954 ret->elf.dynindx = -1;
955 ret->plt_got.offset = (bfd_vma) -1;
956 *slot = ret;
957 }
958 return &ret->elf;
959 }
960
961 /* Destroy an i386 ELF linker hash table. */
962
963 static void
964 elf_i386_link_hash_table_free (bfd *obfd)
965 {
966 struct elf_i386_link_hash_table *htab
967 = (struct elf_i386_link_hash_table *) obfd->link.hash;
968
969 if (htab->loc_hash_table)
970 htab_delete (htab->loc_hash_table);
971 if (htab->loc_hash_memory)
972 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
973 _bfd_elf_link_hash_table_free (obfd);
974 }
975
976 /* Create an i386 ELF linker hash table. */
977
978 static struct bfd_link_hash_table *
979 elf_i386_link_hash_table_create (bfd *abfd)
980 {
981 struct elf_i386_link_hash_table *ret;
982 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
983
984 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
985 if (ret == NULL)
986 return NULL;
987
988 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
989 elf_i386_link_hash_newfunc,
990 sizeof (struct elf_i386_link_hash_entry),
991 I386_ELF_DATA))
992 {
993 free (ret);
994 return NULL;
995 }
996
997 ret->loc_hash_table = htab_try_create (1024,
998 elf_i386_local_htab_hash,
999 elf_i386_local_htab_eq,
1000 NULL);
1001 ret->loc_hash_memory = objalloc_create ();
1002 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1003 {
1004 elf_i386_link_hash_table_free (abfd);
1005 return NULL;
1006 }
1007 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1008
1009 return &ret->elf.root;
1010 }
1011
1012 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1013 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1014 hash table. */
1015
1016 static bfd_boolean
1017 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1018 {
1019 struct elf_i386_link_hash_table *htab;
1020
1021 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1022 return FALSE;
1023
1024 htab = elf_i386_hash_table (info);
1025 if (htab == NULL)
1026 return FALSE;
1027
1028 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1029 if (!htab->sdynbss)
1030 abort ();
1031
1032 if (info->executable)
1033 {
1034 /* Always allow copy relocs for building executables. */
1035 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1036 if (s == NULL)
1037 {
1038 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1039 s = bfd_make_section_anyway_with_flags (dynobj,
1040 ".rel.bss",
1041 (bed->dynamic_sec_flags
1042 | SEC_READONLY));
1043 if (s == NULL
1044 || ! bfd_set_section_alignment (dynobj, s,
1045 bed->s->log_file_align))
1046 return FALSE;
1047 }
1048 htab->srelbss = s;
1049 }
1050
1051 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1052 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1053 &htab->srelplt2))
1054 return FALSE;
1055
1056 if (!info->no_ld_generated_unwind_info
1057 && htab->plt_eh_frame == NULL
1058 && htab->elf.splt != NULL)
1059 {
1060 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1061 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1062 | SEC_LINKER_CREATED);
1063 htab->plt_eh_frame
1064 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1065 if (htab->plt_eh_frame == NULL
1066 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1067 return FALSE;
1068 }
1069
1070 return TRUE;
1071 }
1072
1073 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1074
1075 static void
1076 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1077 struct elf_link_hash_entry *dir,
1078 struct elf_link_hash_entry *ind)
1079 {
1080 struct elf_i386_link_hash_entry *edir, *eind;
1081
1082 edir = (struct elf_i386_link_hash_entry *) dir;
1083 eind = (struct elf_i386_link_hash_entry *) ind;
1084
1085 if (eind->dyn_relocs != NULL)
1086 {
1087 if (edir->dyn_relocs != NULL)
1088 {
1089 struct elf_dyn_relocs **pp;
1090 struct elf_dyn_relocs *p;
1091
1092 /* Add reloc counts against the indirect sym to the direct sym
1093 list. Merge any entries against the same section. */
1094 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1095 {
1096 struct elf_dyn_relocs *q;
1097
1098 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1099 if (q->sec == p->sec)
1100 {
1101 q->pc_count += p->pc_count;
1102 q->count += p->count;
1103 *pp = p->next;
1104 break;
1105 }
1106 if (q == NULL)
1107 pp = &p->next;
1108 }
1109 *pp = edir->dyn_relocs;
1110 }
1111
1112 edir->dyn_relocs = eind->dyn_relocs;
1113 eind->dyn_relocs = NULL;
1114 }
1115
1116 if (ind->root.type == bfd_link_hash_indirect
1117 && dir->got.refcount <= 0)
1118 {
1119 edir->tls_type = eind->tls_type;
1120 eind->tls_type = GOT_UNKNOWN;
1121 }
1122
1123 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1124 generate a R_386_COPY reloc. */
1125 edir->gotoff_ref |= eind->gotoff_ref;
1126
1127 if (ELIMINATE_COPY_RELOCS
1128 && ind->root.type != bfd_link_hash_indirect
1129 && dir->dynamic_adjusted)
1130 {
1131 /* If called to transfer flags for a weakdef during processing
1132 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1133 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1134 dir->ref_dynamic |= ind->ref_dynamic;
1135 dir->ref_regular |= ind->ref_regular;
1136 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1137 dir->needs_plt |= ind->needs_plt;
1138 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1139 }
1140 else
1141 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1142 }
1143
1144 /* Return TRUE if the TLS access code sequence support transition
1145 from R_TYPE. */
1146
1147 static bfd_boolean
1148 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1149 bfd_byte *contents,
1150 Elf_Internal_Shdr *symtab_hdr,
1151 struct elf_link_hash_entry **sym_hashes,
1152 unsigned int r_type,
1153 const Elf_Internal_Rela *rel,
1154 const Elf_Internal_Rela *relend)
1155 {
1156 unsigned int val, type;
1157 unsigned long r_symndx;
1158 struct elf_link_hash_entry *h;
1159 bfd_vma offset;
1160
1161 /* Get the section contents. */
1162 if (contents == NULL)
1163 {
1164 if (elf_section_data (sec)->this_hdr.contents != NULL)
1165 contents = elf_section_data (sec)->this_hdr.contents;
1166 else
1167 {
1168 /* FIXME: How to better handle error condition? */
1169 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1170 return FALSE;
1171
1172 /* Cache the section contents for elf_link_input_bfd. */
1173 elf_section_data (sec)->this_hdr.contents = contents;
1174 }
1175 }
1176
1177 offset = rel->r_offset;
1178 switch (r_type)
1179 {
1180 case R_386_TLS_GD:
1181 case R_386_TLS_LDM:
1182 if (offset < 2 || (rel + 1) >= relend)
1183 return FALSE;
1184
1185 type = bfd_get_8 (abfd, contents + offset - 2);
1186 if (r_type == R_386_TLS_GD)
1187 {
1188 /* Check transition from GD access model. Only
1189 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1190 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1191 can transit to different access model. */
1192 if ((offset + 10) > sec->size ||
1193 (type != 0x8d && type != 0x04))
1194 return FALSE;
1195
1196 val = bfd_get_8 (abfd, contents + offset - 1);
1197 if (type == 0x04)
1198 {
1199 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1200 if (offset < 3)
1201 return FALSE;
1202
1203 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1204 return FALSE;
1205
1206 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1207 return FALSE;
1208 }
1209 else
1210 {
1211 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1212 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1213 return FALSE;
1214
1215 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1216 return FALSE;
1217 }
1218 }
1219 else
1220 {
1221 /* Check transition from LD access model. Only
1222 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1223 can transit to different access model. */
1224 if (type != 0x8d || (offset + 9) > sec->size)
1225 return FALSE;
1226
1227 val = bfd_get_8 (abfd, contents + offset - 1);
1228 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1229 return FALSE;
1230 }
1231
1232 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1233 return FALSE;
1234
1235 r_symndx = ELF32_R_SYM (rel[1].r_info);
1236 if (r_symndx < symtab_hdr->sh_info)
1237 return FALSE;
1238
1239 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1240 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1241 may be versioned. */
1242 return (h != NULL
1243 && h->root.root.string != NULL
1244 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1245 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1246 && (strncmp (h->root.root.string, "___tls_get_addr",
1247 15) == 0));
1248
1249 case R_386_TLS_IE:
1250 /* Check transition from IE access model:
1251 movl foo@indntpoff(%rip), %eax
1252 movl foo@indntpoff(%rip), %reg
1253 addl foo@indntpoff(%rip), %reg
1254 */
1255
1256 if (offset < 1 || (offset + 4) > sec->size)
1257 return FALSE;
1258
1259 /* Check "movl foo@tpoff(%rip), %eax" first. */
1260 val = bfd_get_8 (abfd, contents + offset - 1);
1261 if (val == 0xa1)
1262 return TRUE;
1263
1264 if (offset < 2)
1265 return FALSE;
1266
1267 /* Check movl|addl foo@tpoff(%rip), %reg. */
1268 type = bfd_get_8 (abfd, contents + offset - 2);
1269 return ((type == 0x8b || type == 0x03)
1270 && (val & 0xc7) == 0x05);
1271
1272 case R_386_TLS_GOTIE:
1273 case R_386_TLS_IE_32:
1274 /* Check transition from {IE_32,GOTIE} access model:
1275 subl foo@{tpoff,gontoff}(%reg1), %reg2
1276 movl foo@{tpoff,gontoff}(%reg1), %reg2
1277 addl foo@{tpoff,gontoff}(%reg1), %reg2
1278 */
1279
1280 if (offset < 2 || (offset + 4) > sec->size)
1281 return FALSE;
1282
1283 val = bfd_get_8 (abfd, contents + offset - 1);
1284 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1285 return FALSE;
1286
1287 type = bfd_get_8 (abfd, contents + offset - 2);
1288 return type == 0x8b || type == 0x2b || type == 0x03;
1289
1290 case R_386_TLS_GOTDESC:
1291 /* Check transition from GDesc access model:
1292 leal x@tlsdesc(%ebx), %eax
1293
1294 Make sure it's a leal adding ebx to a 32-bit offset
1295 into any register, although it's probably almost always
1296 going to be eax. */
1297
1298 if (offset < 2 || (offset + 4) > sec->size)
1299 return FALSE;
1300
1301 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1302 return FALSE;
1303
1304 val = bfd_get_8 (abfd, contents + offset - 1);
1305 return (val & 0xc7) == 0x83;
1306
1307 case R_386_TLS_DESC_CALL:
1308 /* Check transition from GDesc access model:
1309 call *x@tlsdesc(%rax)
1310 */
1311 if (offset + 2 <= sec->size)
1312 {
1313 /* Make sure that it's a call *x@tlsdesc(%rax). */
1314 static const unsigned char call[] = { 0xff, 0x10 };
1315 return memcmp (contents + offset, call, 2) == 0;
1316 }
1317
1318 return FALSE;
1319
1320 default:
1321 abort ();
1322 }
1323 }
1324
1325 /* Return TRUE if the TLS access transition is OK or no transition
1326 will be performed. Update R_TYPE if there is a transition. */
1327
1328 static bfd_boolean
1329 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1330 asection *sec, bfd_byte *contents,
1331 Elf_Internal_Shdr *symtab_hdr,
1332 struct elf_link_hash_entry **sym_hashes,
1333 unsigned int *r_type, int tls_type,
1334 const Elf_Internal_Rela *rel,
1335 const Elf_Internal_Rela *relend,
1336 struct elf_link_hash_entry *h,
1337 unsigned long r_symndx)
1338 {
1339 unsigned int from_type = *r_type;
1340 unsigned int to_type = from_type;
1341 bfd_boolean check = TRUE;
1342
1343 /* Skip TLS transition for functions. */
1344 if (h != NULL
1345 && (h->type == STT_FUNC
1346 || h->type == STT_GNU_IFUNC))
1347 return TRUE;
1348
1349 switch (from_type)
1350 {
1351 case R_386_TLS_GD:
1352 case R_386_TLS_GOTDESC:
1353 case R_386_TLS_DESC_CALL:
1354 case R_386_TLS_IE_32:
1355 case R_386_TLS_IE:
1356 case R_386_TLS_GOTIE:
1357 if (info->executable)
1358 {
1359 if (h == NULL)
1360 to_type = R_386_TLS_LE_32;
1361 else if (from_type != R_386_TLS_IE
1362 && from_type != R_386_TLS_GOTIE)
1363 to_type = R_386_TLS_IE_32;
1364 }
1365
1366 /* When we are called from elf_i386_relocate_section, CONTENTS
1367 isn't NULL and there may be additional transitions based on
1368 TLS_TYPE. */
1369 if (contents != NULL)
1370 {
1371 unsigned int new_to_type = to_type;
1372
1373 if (info->executable
1374 && h != NULL
1375 && h->dynindx == -1
1376 && (tls_type & GOT_TLS_IE))
1377 new_to_type = R_386_TLS_LE_32;
1378
1379 if (to_type == R_386_TLS_GD
1380 || to_type == R_386_TLS_GOTDESC
1381 || to_type == R_386_TLS_DESC_CALL)
1382 {
1383 if (tls_type == GOT_TLS_IE_POS)
1384 new_to_type = R_386_TLS_GOTIE;
1385 else if (tls_type & GOT_TLS_IE)
1386 new_to_type = R_386_TLS_IE_32;
1387 }
1388
1389 /* We checked the transition before when we were called from
1390 elf_i386_check_relocs. We only want to check the new
1391 transition which hasn't been checked before. */
1392 check = new_to_type != to_type && from_type == to_type;
1393 to_type = new_to_type;
1394 }
1395
1396 break;
1397
1398 case R_386_TLS_LDM:
1399 if (info->executable)
1400 to_type = R_386_TLS_LE_32;
1401 break;
1402
1403 default:
1404 return TRUE;
1405 }
1406
1407 /* Return TRUE if there is no transition. */
1408 if (from_type == to_type)
1409 return TRUE;
1410
1411 /* Check if the transition can be performed. */
1412 if (check
1413 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1414 symtab_hdr, sym_hashes,
1415 from_type, rel, relend))
1416 {
1417 reloc_howto_type *from, *to;
1418 const char *name;
1419
1420 from = elf_i386_rtype_to_howto (abfd, from_type);
1421 to = elf_i386_rtype_to_howto (abfd, to_type);
1422
1423 if (h)
1424 name = h->root.root.string;
1425 else
1426 {
1427 struct elf_i386_link_hash_table *htab;
1428
1429 htab = elf_i386_hash_table (info);
1430 if (htab == NULL)
1431 name = "*unknown*";
1432 else
1433 {
1434 Elf_Internal_Sym *isym;
1435
1436 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1437 abfd, r_symndx);
1438 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1439 }
1440 }
1441
1442 (*_bfd_error_handler)
1443 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1444 "in section `%A' failed"),
1445 abfd, sec, from->name, to->name, name,
1446 (unsigned long) rel->r_offset);
1447 bfd_set_error (bfd_error_bad_value);
1448 return FALSE;
1449 }
1450
1451 *r_type = to_type;
1452 return TRUE;
1453 }
1454
1455 /* Rename some of the generic section flags to better document how they
1456 are used here. */
1457 #define need_convert_mov_to_lea sec_flg0
1458
1459 /* Look through the relocs for a section during the first phase, and
1460 calculate needed space in the global offset table, procedure linkage
1461 table, and dynamic reloc sections. */
1462
1463 static bfd_boolean
1464 elf_i386_check_relocs (bfd *abfd,
1465 struct bfd_link_info *info,
1466 asection *sec,
1467 const Elf_Internal_Rela *relocs)
1468 {
1469 struct elf_i386_link_hash_table *htab;
1470 Elf_Internal_Shdr *symtab_hdr;
1471 struct elf_link_hash_entry **sym_hashes;
1472 const Elf_Internal_Rela *rel;
1473 const Elf_Internal_Rela *rel_end;
1474 asection *sreloc;
1475 bfd_boolean use_plt_got;
1476
1477 if (info->relocatable)
1478 return TRUE;
1479
1480 BFD_ASSERT (is_i386_elf (abfd));
1481
1482 htab = elf_i386_hash_table (info);
1483 if (htab == NULL)
1484 return FALSE;
1485
1486 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1487 && (get_elf_i386_backend_data (abfd)
1488 == &elf_i386_arch_bed));
1489
1490 symtab_hdr = &elf_symtab_hdr (abfd);
1491 sym_hashes = elf_sym_hashes (abfd);
1492
1493 sreloc = NULL;
1494
1495 rel_end = relocs + sec->reloc_count;
1496 for (rel = relocs; rel < rel_end; rel++)
1497 {
1498 unsigned int r_type;
1499 unsigned long r_symndx;
1500 struct elf_link_hash_entry *h;
1501 struct elf_i386_link_hash_entry *eh;
1502 Elf_Internal_Sym *isym;
1503 const char *name;
1504 bfd_boolean size_reloc;
1505
1506 r_symndx = ELF32_R_SYM (rel->r_info);
1507 r_type = ELF32_R_TYPE (rel->r_info);
1508
1509 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1510 {
1511 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1512 abfd,
1513 r_symndx);
1514 return FALSE;
1515 }
1516
1517 if (r_symndx < symtab_hdr->sh_info)
1518 {
1519 /* A local symbol. */
1520 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1521 abfd, r_symndx);
1522 if (isym == NULL)
1523 return FALSE;
1524
1525 /* Check relocation against local STT_GNU_IFUNC symbol. */
1526 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1527 {
1528 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1529 if (h == NULL)
1530 return FALSE;
1531
1532 /* Fake a STT_GNU_IFUNC symbol. */
1533 h->type = STT_GNU_IFUNC;
1534 h->def_regular = 1;
1535 h->ref_regular = 1;
1536 h->forced_local = 1;
1537 h->root.type = bfd_link_hash_defined;
1538 }
1539 else
1540 h = NULL;
1541 }
1542 else
1543 {
1544 isym = NULL;
1545 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1546 while (h->root.type == bfd_link_hash_indirect
1547 || h->root.type == bfd_link_hash_warning)
1548 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1549 }
1550
1551 eh = (struct elf_i386_link_hash_entry *) h;
1552 if (h != NULL)
1553 {
1554 /* Create the ifunc sections for static executables. If we
1555 never see an indirect function symbol nor we are building
1556 a static executable, those sections will be empty and
1557 won't appear in output. */
1558 switch (r_type)
1559 {
1560 default:
1561 break;
1562
1563 case R_386_GOTOFF:
1564 eh->gotoff_ref = 1;
1565 case R_386_32:
1566 case R_386_PC32:
1567 case R_386_PLT32:
1568 case R_386_GOT32:
1569 if (htab->elf.dynobj == NULL)
1570 htab->elf.dynobj = abfd;
1571 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1572 return FALSE;
1573 break;
1574 }
1575
1576 /* It is referenced by a non-shared object. */
1577 h->ref_regular = 1;
1578 h->root.non_ir_ref = 1;
1579 }
1580
1581 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1582 symtab_hdr, sym_hashes,
1583 &r_type, GOT_UNKNOWN,
1584 rel, rel_end, h, r_symndx))
1585 return FALSE;
1586
1587 switch (r_type)
1588 {
1589 case R_386_TLS_LDM:
1590 htab->tls_ldm_got.refcount += 1;
1591 goto create_got;
1592
1593 case R_386_PLT32:
1594 /* This symbol requires a procedure linkage table entry. We
1595 actually build the entry in adjust_dynamic_symbol,
1596 because this might be a case of linking PIC code which is
1597 never referenced by a dynamic object, in which case we
1598 don't need to generate a procedure linkage table entry
1599 after all. */
1600
1601 /* If this is a local symbol, we resolve it directly without
1602 creating a procedure linkage table entry. */
1603 if (h == NULL)
1604 continue;
1605
1606 h->needs_plt = 1;
1607 h->plt.refcount += 1;
1608 break;
1609
1610 case R_386_SIZE32:
1611 size_reloc = TRUE;
1612 goto do_size;
1613
1614 case R_386_TLS_IE_32:
1615 case R_386_TLS_IE:
1616 case R_386_TLS_GOTIE:
1617 if (!info->executable)
1618 info->flags |= DF_STATIC_TLS;
1619 /* Fall through */
1620
1621 case R_386_GOT32:
1622 case R_386_TLS_GD:
1623 case R_386_TLS_GOTDESC:
1624 case R_386_TLS_DESC_CALL:
1625 /* This symbol requires a global offset table entry. */
1626 {
1627 int tls_type, old_tls_type;
1628
1629 switch (r_type)
1630 {
1631 default:
1632 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1633 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1634 case R_386_TLS_GOTDESC:
1635 case R_386_TLS_DESC_CALL:
1636 tls_type = GOT_TLS_GDESC; break;
1637 case R_386_TLS_IE_32:
1638 if (ELF32_R_TYPE (rel->r_info) == r_type)
1639 tls_type = GOT_TLS_IE_NEG;
1640 else
1641 /* If this is a GD->IE transition, we may use either of
1642 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1643 tls_type = GOT_TLS_IE;
1644 break;
1645 case R_386_TLS_IE:
1646 case R_386_TLS_GOTIE:
1647 tls_type = GOT_TLS_IE_POS; break;
1648 }
1649
1650 if (h != NULL)
1651 {
1652 h->got.refcount += 1;
1653 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1654 }
1655 else
1656 {
1657 bfd_signed_vma *local_got_refcounts;
1658
1659 /* This is a global offset table entry for a local symbol. */
1660 local_got_refcounts = elf_local_got_refcounts (abfd);
1661 if (local_got_refcounts == NULL)
1662 {
1663 bfd_size_type size;
1664
1665 size = symtab_hdr->sh_info;
1666 size *= (sizeof (bfd_signed_vma)
1667 + sizeof (bfd_vma) + sizeof(char));
1668 local_got_refcounts = (bfd_signed_vma *)
1669 bfd_zalloc (abfd, size);
1670 if (local_got_refcounts == NULL)
1671 return FALSE;
1672 elf_local_got_refcounts (abfd) = local_got_refcounts;
1673 elf_i386_local_tlsdesc_gotent (abfd)
1674 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1675 elf_i386_local_got_tls_type (abfd)
1676 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1677 }
1678 local_got_refcounts[r_symndx] += 1;
1679 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1680 }
1681
1682 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1683 tls_type |= old_tls_type;
1684 /* If a TLS symbol is accessed using IE at least once,
1685 there is no point to use dynamic model for it. */
1686 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1687 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1688 || (tls_type & GOT_TLS_IE) == 0))
1689 {
1690 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1691 tls_type = old_tls_type;
1692 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1693 && GOT_TLS_GD_ANY_P (tls_type))
1694 tls_type |= old_tls_type;
1695 else
1696 {
1697 if (h)
1698 name = h->root.root.string;
1699 else
1700 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1701 NULL);
1702 (*_bfd_error_handler)
1703 (_("%B: `%s' accessed both as normal and "
1704 "thread local symbol"),
1705 abfd, name);
1706 bfd_set_error (bfd_error_bad_value);
1707 return FALSE;
1708 }
1709 }
1710
1711 if (old_tls_type != tls_type)
1712 {
1713 if (h != NULL)
1714 elf_i386_hash_entry (h)->tls_type = tls_type;
1715 else
1716 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1717 }
1718 }
1719 /* Fall through */
1720
1721 case R_386_GOTOFF:
1722 case R_386_GOTPC:
1723 create_got:
1724 if (htab->elf.sgot == NULL)
1725 {
1726 if (htab->elf.dynobj == NULL)
1727 htab->elf.dynobj = abfd;
1728 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1729 return FALSE;
1730 }
1731 if (r_type != R_386_TLS_IE)
1732 break;
1733 /* Fall through */
1734
1735 case R_386_TLS_LE_32:
1736 case R_386_TLS_LE:
1737 if (info->executable)
1738 break;
1739 info->flags |= DF_STATIC_TLS;
1740 /* Fall through */
1741
1742 case R_386_32:
1743 case R_386_PC32:
1744 if (h != NULL && info->executable)
1745 {
1746 /* If this reloc is in a read-only section, we might
1747 need a copy reloc. We can't check reliably at this
1748 stage whether the section is read-only, as input
1749 sections have not yet been mapped to output sections.
1750 Tentatively set the flag for now, and correct in
1751 adjust_dynamic_symbol. */
1752 h->non_got_ref = 1;
1753
1754 /* We may need a .plt entry if the function this reloc
1755 refers to is in a shared lib. */
1756 h->plt.refcount += 1;
1757 if (r_type != R_386_PC32)
1758 h->pointer_equality_needed = 1;
1759 }
1760
1761 size_reloc = FALSE;
1762 do_size:
1763 /* If we are creating a shared library, and this is a reloc
1764 against a global symbol, or a non PC relative reloc
1765 against a local symbol, then we need to copy the reloc
1766 into the shared library. However, if we are linking with
1767 -Bsymbolic, we do not need to copy a reloc against a
1768 global symbol which is defined in an object we are
1769 including in the link (i.e., DEF_REGULAR is set). At
1770 this point we have not seen all the input files, so it is
1771 possible that DEF_REGULAR is not set now but will be set
1772 later (it is never cleared). In case of a weak definition,
1773 DEF_REGULAR may be cleared later by a strong definition in
1774 a shared library. We account for that possibility below by
1775 storing information in the relocs_copied field of the hash
1776 table entry. A similar situation occurs when creating
1777 shared libraries and symbol visibility changes render the
1778 symbol local.
1779
1780 If on the other hand, we are creating an executable, we
1781 may need to keep relocations for symbols satisfied by a
1782 dynamic library if we manage to avoid copy relocs for the
1783 symbol. */
1784 if ((info->shared
1785 && (sec->flags & SEC_ALLOC) != 0
1786 && (r_type != R_386_PC32
1787 || (h != NULL
1788 && (! SYMBOLIC_BIND (info, h)
1789 || h->root.type == bfd_link_hash_defweak
1790 || !h->def_regular))))
1791 || (ELIMINATE_COPY_RELOCS
1792 && !info->shared
1793 && (sec->flags & SEC_ALLOC) != 0
1794 && h != NULL
1795 && (h->root.type == bfd_link_hash_defweak
1796 || !h->def_regular)))
1797 {
1798 struct elf_dyn_relocs *p;
1799 struct elf_dyn_relocs **head;
1800
1801 /* We must copy these reloc types into the output file.
1802 Create a reloc section in dynobj and make room for
1803 this reloc. */
1804 if (sreloc == NULL)
1805 {
1806 if (htab->elf.dynobj == NULL)
1807 htab->elf.dynobj = abfd;
1808
1809 sreloc = _bfd_elf_make_dynamic_reloc_section
1810 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1811
1812 if (sreloc == NULL)
1813 return FALSE;
1814 }
1815
1816 /* If this is a global symbol, we count the number of
1817 relocations we need for this symbol. */
1818 if (h != NULL)
1819 {
1820 head = &eh->dyn_relocs;
1821 }
1822 else
1823 {
1824 /* Track dynamic relocs needed for local syms too.
1825 We really need local syms available to do this
1826 easily. Oh well. */
1827 void **vpp;
1828 asection *s;
1829
1830 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1831 abfd, r_symndx);
1832 if (isym == NULL)
1833 return FALSE;
1834
1835 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1836 if (s == NULL)
1837 s = sec;
1838
1839 vpp = &elf_section_data (s)->local_dynrel;
1840 head = (struct elf_dyn_relocs **)vpp;
1841 }
1842
1843 p = *head;
1844 if (p == NULL || p->sec != sec)
1845 {
1846 bfd_size_type amt = sizeof *p;
1847 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1848 amt);
1849 if (p == NULL)
1850 return FALSE;
1851 p->next = *head;
1852 *head = p;
1853 p->sec = sec;
1854 p->count = 0;
1855 p->pc_count = 0;
1856 }
1857
1858 p->count += 1;
1859 /* Count size relocation as PC-relative relocation. */
1860 if (r_type == R_386_PC32 || size_reloc)
1861 p->pc_count += 1;
1862 }
1863 break;
1864
1865 /* This relocation describes the C++ object vtable hierarchy.
1866 Reconstruct it for later use during GC. */
1867 case R_386_GNU_VTINHERIT:
1868 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1869 return FALSE;
1870 break;
1871
1872 /* This relocation describes which C++ vtable entries are actually
1873 used. Record for later use during GC. */
1874 case R_386_GNU_VTENTRY:
1875 BFD_ASSERT (h != NULL);
1876 if (h != NULL
1877 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1878 return FALSE;
1879 break;
1880
1881 default:
1882 break;
1883 }
1884
1885 if (use_plt_got
1886 && h != NULL
1887 && h->plt.refcount > 0
1888 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
1889 || h->got.refcount > 0)
1890 && htab->plt_got == NULL)
1891 {
1892 /* Create the GOT procedure linkage table. */
1893 unsigned int plt_got_align;
1894 const struct elf_backend_data *bed;
1895
1896 bed = get_elf_backend_data (info->output_bfd);
1897 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1898 && (sizeof (elf_i386_got_plt_entry)
1899 == sizeof (elf_i386_pic_got_plt_entry)));
1900 plt_got_align = 3;
1901
1902 if (htab->elf.dynobj == NULL)
1903 htab->elf.dynobj = abfd;
1904 htab->plt_got
1905 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1906 ".plt.got",
1907 (bed->dynamic_sec_flags
1908 | SEC_ALLOC
1909 | SEC_CODE
1910 | SEC_LOAD
1911 | SEC_READONLY));
1912 if (htab->plt_got == NULL
1913 || !bfd_set_section_alignment (htab->elf.dynobj,
1914 htab->plt_got,
1915 plt_got_align))
1916 return FALSE;
1917 }
1918
1919 if (r_type == R_386_GOT32
1920 && (h == NULL || h->type != STT_GNU_IFUNC))
1921 sec->need_convert_mov_to_lea = 1;
1922 }
1923
1924 return TRUE;
1925 }
1926
1927 /* Return the section that should be marked against GC for a given
1928 relocation. */
1929
1930 static asection *
1931 elf_i386_gc_mark_hook (asection *sec,
1932 struct bfd_link_info *info,
1933 Elf_Internal_Rela *rel,
1934 struct elf_link_hash_entry *h,
1935 Elf_Internal_Sym *sym)
1936 {
1937 if (h != NULL)
1938 switch (ELF32_R_TYPE (rel->r_info))
1939 {
1940 case R_386_GNU_VTINHERIT:
1941 case R_386_GNU_VTENTRY:
1942 return NULL;
1943 }
1944
1945 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1946 }
1947
1948 /* Update the got entry reference counts for the section being removed. */
1949
1950 static bfd_boolean
1951 elf_i386_gc_sweep_hook (bfd *abfd,
1952 struct bfd_link_info *info,
1953 asection *sec,
1954 const Elf_Internal_Rela *relocs)
1955 {
1956 struct elf_i386_link_hash_table *htab;
1957 Elf_Internal_Shdr *symtab_hdr;
1958 struct elf_link_hash_entry **sym_hashes;
1959 bfd_signed_vma *local_got_refcounts;
1960 const Elf_Internal_Rela *rel, *relend;
1961
1962 if (info->relocatable)
1963 return TRUE;
1964
1965 htab = elf_i386_hash_table (info);
1966 if (htab == NULL)
1967 return FALSE;
1968
1969 elf_section_data (sec)->local_dynrel = NULL;
1970
1971 symtab_hdr = &elf_symtab_hdr (abfd);
1972 sym_hashes = elf_sym_hashes (abfd);
1973 local_got_refcounts = elf_local_got_refcounts (abfd);
1974
1975 relend = relocs + sec->reloc_count;
1976 for (rel = relocs; rel < relend; rel++)
1977 {
1978 unsigned long r_symndx;
1979 unsigned int r_type;
1980 struct elf_link_hash_entry *h = NULL;
1981
1982 r_symndx = ELF32_R_SYM (rel->r_info);
1983 if (r_symndx >= symtab_hdr->sh_info)
1984 {
1985 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1986 while (h->root.type == bfd_link_hash_indirect
1987 || h->root.type == bfd_link_hash_warning)
1988 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1989 }
1990 else
1991 {
1992 /* A local symbol. */
1993 Elf_Internal_Sym *isym;
1994
1995 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1996 abfd, r_symndx);
1997
1998 /* Check relocation against local STT_GNU_IFUNC symbol. */
1999 if (isym != NULL
2000 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2001 {
2002 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
2003 if (h == NULL)
2004 abort ();
2005 }
2006 }
2007
2008 if (h)
2009 {
2010 struct elf_i386_link_hash_entry *eh;
2011 struct elf_dyn_relocs **pp;
2012 struct elf_dyn_relocs *p;
2013
2014 eh = (struct elf_i386_link_hash_entry *) h;
2015 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2016 if (p->sec == sec)
2017 {
2018 /* Everything must go for SEC. */
2019 *pp = p->next;
2020 break;
2021 }
2022 }
2023
2024 r_type = ELF32_R_TYPE (rel->r_info);
2025 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
2026 symtab_hdr, sym_hashes,
2027 &r_type, GOT_UNKNOWN,
2028 rel, relend, h, r_symndx))
2029 return FALSE;
2030
2031 switch (r_type)
2032 {
2033 case R_386_TLS_LDM:
2034 if (htab->tls_ldm_got.refcount > 0)
2035 htab->tls_ldm_got.refcount -= 1;
2036 break;
2037
2038 case R_386_TLS_GD:
2039 case R_386_TLS_GOTDESC:
2040 case R_386_TLS_DESC_CALL:
2041 case R_386_TLS_IE_32:
2042 case R_386_TLS_IE:
2043 case R_386_TLS_GOTIE:
2044 case R_386_GOT32:
2045 if (h != NULL)
2046 {
2047 if (h->got.refcount > 0)
2048 h->got.refcount -= 1;
2049 if (h->type == STT_GNU_IFUNC)
2050 {
2051 if (h->plt.refcount > 0)
2052 h->plt.refcount -= 1;
2053 }
2054 }
2055 else if (local_got_refcounts != NULL)
2056 {
2057 if (local_got_refcounts[r_symndx] > 0)
2058 local_got_refcounts[r_symndx] -= 1;
2059 }
2060 break;
2061
2062 case R_386_32:
2063 case R_386_PC32:
2064 case R_386_SIZE32:
2065 if (info->shared
2066 && (h == NULL || h->type != STT_GNU_IFUNC))
2067 break;
2068 /* Fall through */
2069
2070 case R_386_PLT32:
2071 if (h != NULL)
2072 {
2073 if (h->plt.refcount > 0)
2074 h->plt.refcount -= 1;
2075 }
2076 break;
2077
2078 case R_386_GOTOFF:
2079 if (h != NULL && h->type == STT_GNU_IFUNC)
2080 {
2081 if (h->got.refcount > 0)
2082 h->got.refcount -= 1;
2083 if (h->plt.refcount > 0)
2084 h->plt.refcount -= 1;
2085 }
2086 break;
2087
2088 default:
2089 break;
2090 }
2091 }
2092
2093 return TRUE;
2094 }
2095
2096 /* Adjust a symbol defined by a dynamic object and referenced by a
2097 regular object. The current definition is in some section of the
2098 dynamic object, but we're not including those sections. We have to
2099 change the definition to something the rest of the link can
2100 understand. */
2101
2102 static bfd_boolean
2103 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2104 struct elf_link_hash_entry *h)
2105 {
2106 struct elf_i386_link_hash_table *htab;
2107 asection *s;
2108 struct elf_i386_link_hash_entry *eh;
2109 struct elf_dyn_relocs *p;
2110
2111 /* STT_GNU_IFUNC symbol must go through PLT. */
2112 if (h->type == STT_GNU_IFUNC)
2113 {
2114 /* All local STT_GNU_IFUNC references must be treate as local
2115 calls via local PLT. */
2116 if (h->ref_regular
2117 && SYMBOL_CALLS_LOCAL (info, h))
2118 {
2119 bfd_size_type pc_count = 0, count = 0;
2120 struct elf_dyn_relocs **pp;
2121
2122 eh = (struct elf_i386_link_hash_entry *) h;
2123 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2124 {
2125 pc_count += p->pc_count;
2126 p->count -= p->pc_count;
2127 p->pc_count = 0;
2128 count += p->count;
2129 if (p->count == 0)
2130 *pp = p->next;
2131 else
2132 pp = &p->next;
2133 }
2134
2135 if (pc_count || count)
2136 {
2137 h->needs_plt = 1;
2138 h->non_got_ref = 1;
2139 if (h->plt.refcount <= 0)
2140 h->plt.refcount = 1;
2141 else
2142 h->plt.refcount += 1;
2143 }
2144 }
2145
2146 if (h->plt.refcount <= 0)
2147 {
2148 h->plt.offset = (bfd_vma) -1;
2149 h->needs_plt = 0;
2150 }
2151 return TRUE;
2152 }
2153
2154 /* If this is a function, put it in the procedure linkage table. We
2155 will fill in the contents of the procedure linkage table later,
2156 when we know the address of the .got section. */
2157 if (h->type == STT_FUNC
2158 || h->needs_plt)
2159 {
2160 if (h->plt.refcount <= 0
2161 || SYMBOL_CALLS_LOCAL (info, h)
2162 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2163 && h->root.type == bfd_link_hash_undefweak))
2164 {
2165 /* This case can occur if we saw a PLT32 reloc in an input
2166 file, but the symbol was never referred to by a dynamic
2167 object, or if all references were garbage collected. In
2168 such a case, we don't actually need to build a procedure
2169 linkage table, and we can just do a PC32 reloc instead. */
2170 h->plt.offset = (bfd_vma) -1;
2171 h->needs_plt = 0;
2172 }
2173
2174 return TRUE;
2175 }
2176 else
2177 /* It's possible that we incorrectly decided a .plt reloc was
2178 needed for an R_386_PC32 reloc to a non-function sym in
2179 check_relocs. We can't decide accurately between function and
2180 non-function syms in check-relocs; Objects loaded later in
2181 the link may change h->type. So fix it now. */
2182 h->plt.offset = (bfd_vma) -1;
2183
2184 /* If this is a weak symbol, and there is a real definition, the
2185 processor independent code will have arranged for us to see the
2186 real definition first, and we can just use the same value. */
2187 if (h->u.weakdef != NULL)
2188 {
2189 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2190 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2191 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2192 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2193 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2194 h->non_got_ref = h->u.weakdef->non_got_ref;
2195 return TRUE;
2196 }
2197
2198 /* This is a reference to a symbol defined by a dynamic object which
2199 is not a function. */
2200
2201 /* If we are creating a shared library, we must presume that the
2202 only references to the symbol are via the global offset table.
2203 For such cases we need not do anything here; the relocations will
2204 be handled correctly by relocate_section. */
2205 if (!info->executable)
2206 return TRUE;
2207
2208 /* If there are no references to this symbol that do not use the
2209 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2210 reloc. */
2211 eh = (struct elf_i386_link_hash_entry *) h;
2212 if (!h->non_got_ref && !eh->gotoff_ref)
2213 return TRUE;
2214
2215 /* If -z nocopyreloc was given, we won't generate them either. */
2216 if (info->nocopyreloc)
2217 {
2218 h->non_got_ref = 0;
2219 return TRUE;
2220 }
2221
2222 htab = elf_i386_hash_table (info);
2223 if (htab == NULL)
2224 return FALSE;
2225
2226 /* If there aren't any dynamic relocs in read-only sections nor
2227 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2228 avoid the copy reloc. This doesn't work on VxWorks, where we can
2229 not have dynamic relocations (other than copy and jump slot
2230 relocations) in an executable. */
2231 if (ELIMINATE_COPY_RELOCS
2232 && !eh->gotoff_ref
2233 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2234 {
2235 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2236 {
2237 s = p->sec->output_section;
2238 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2239 break;
2240 }
2241
2242 if (p == NULL)
2243 {
2244 h->non_got_ref = 0;
2245 return TRUE;
2246 }
2247 }
2248
2249 /* We must allocate the symbol in our .dynbss section, which will
2250 become part of the .bss section of the executable. There will be
2251 an entry for this symbol in the .dynsym section. The dynamic
2252 object will contain position independent code, so all references
2253 from the dynamic object to this symbol will go through the global
2254 offset table. The dynamic linker will use the .dynsym entry to
2255 determine the address it must put in the global offset table, so
2256 both the dynamic object and the regular object will refer to the
2257 same memory location for the variable. */
2258
2259 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2260 copy the initial value out of the dynamic object and into the
2261 runtime process image. */
2262 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2263 {
2264 htab->srelbss->size += sizeof (Elf32_External_Rel);
2265 h->needs_copy = 1;
2266 }
2267
2268 s = htab->sdynbss;
2269
2270 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2271 }
2272
2273 /* Allocate space in .plt, .got and associated reloc sections for
2274 dynamic relocs. */
2275
2276 static bfd_boolean
2277 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2278 {
2279 struct bfd_link_info *info;
2280 struct elf_i386_link_hash_table *htab;
2281 struct elf_i386_link_hash_entry *eh;
2282 struct elf_dyn_relocs *p;
2283 unsigned plt_entry_size;
2284
2285 if (h->root.type == bfd_link_hash_indirect)
2286 return TRUE;
2287
2288 eh = (struct elf_i386_link_hash_entry *) h;
2289
2290 info = (struct bfd_link_info *) inf;
2291 htab = elf_i386_hash_table (info);
2292 if (htab == NULL)
2293 return FALSE;
2294
2295 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2296
2297 /* We can't use the GOT PLT if pointer equality is needed since
2298 finish_dynamic_symbol won't clear symbol value and the dynamic
2299 linker won't update the GOT slot. We will get into an infinite
2300 loop at run-time. */
2301 if (htab->plt_got != NULL
2302 && h->type != STT_GNU_IFUNC
2303 && !h->pointer_equality_needed
2304 && h->plt.refcount > 0
2305 && h->got.refcount > 0)
2306 {
2307 /* Don't use the regular PLT if there are both GOT and GOTPLT
2308 reloctions. */
2309 h->plt.offset = (bfd_vma) -1;
2310
2311 /* Use the GOT PLT. */
2312 eh->plt_got.refcount = 1;
2313 }
2314
2315 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2316 here if it is defined and referenced in a non-shared object. */
2317 if (h->type == STT_GNU_IFUNC
2318 && h->def_regular)
2319 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2320 plt_entry_size,
2321 plt_entry_size, 4);
2322 else if (htab->elf.dynamic_sections_created
2323 && (h->plt.refcount > 0 || eh->plt_got.refcount > 0))
2324 {
2325 bfd_boolean use_plt_got;
2326
2327 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2328 {
2329 /* Don't use the regular PLT for DF_BIND_NOW. */
2330 h->plt.offset = (bfd_vma) -1;
2331
2332 /* Use the GOT PLT. */
2333 h->got.refcount = 1;
2334 eh->plt_got.refcount = 1;
2335 }
2336
2337 use_plt_got = eh->plt_got.refcount > 0;
2338
2339 /* Make sure this symbol is output as a dynamic symbol.
2340 Undefined weak syms won't yet be marked as dynamic. */
2341 if (h->dynindx == -1
2342 && !h->forced_local)
2343 {
2344 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2345 return FALSE;
2346 }
2347
2348 if (info->shared
2349 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2350 {
2351 asection *s = htab->elf.splt;
2352 asection *got_s = htab->plt_got;
2353
2354 /* If this is the first .plt entry, make room for the special
2355 first entry. The .plt section is used by prelink to undo
2356 prelinking for dynamic relocations. */
2357 if (s->size == 0)
2358 s->size = plt_entry_size;
2359
2360 if (use_plt_got)
2361 eh->plt_got.offset = got_s->size;
2362 else
2363 h->plt.offset = s->size;
2364
2365 /* If this symbol is not defined in a regular file, and we are
2366 not generating a shared library, then set the symbol to this
2367 location in the .plt. This is required to make function
2368 pointers compare as equal between the normal executable and
2369 the shared library. */
2370 if (! info->shared
2371 && !h->def_regular)
2372 {
2373 if (use_plt_got)
2374 {
2375 /* We need to make a call to the entry of the GOT PLT
2376 instead of regular PLT entry. */
2377 h->root.u.def.section = got_s;
2378 h->root.u.def.value = eh->plt_got.offset;
2379 }
2380 else
2381 {
2382 h->root.u.def.section = s;
2383 h->root.u.def.value = h->plt.offset;
2384 }
2385 }
2386
2387 /* Make room for this entry. */
2388 if (use_plt_got)
2389 got_s->size += sizeof (elf_i386_got_plt_entry);
2390 else
2391 {
2392 s->size += plt_entry_size;
2393
2394 /* We also need to make an entry in the .got.plt section,
2395 which will be placed in the .got section by the linker
2396 script. */
2397 htab->elf.sgotplt->size += 4;
2398
2399 /* We also need to make an entry in the .rel.plt section. */
2400 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2401 htab->elf.srelplt->reloc_count++;
2402 }
2403
2404 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2405 && !info->shared)
2406 {
2407 /* VxWorks has a second set of relocations for each PLT entry
2408 in executables. They go in a separate relocation section,
2409 which is processed by the kernel loader. */
2410
2411 /* There are two relocations for the initial PLT entry: an
2412 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2413 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2414
2415 if (h->plt.offset == plt_entry_size)
2416 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2417
2418 /* There are two extra relocations for each subsequent PLT entry:
2419 an R_386_32 relocation for the GOT entry, and an R_386_32
2420 relocation for the PLT entry. */
2421
2422 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2423 }
2424 }
2425 else
2426 {
2427 h->plt.offset = (bfd_vma) -1;
2428 h->needs_plt = 0;
2429 }
2430 }
2431 else
2432 {
2433 h->plt.offset = (bfd_vma) -1;
2434 h->needs_plt = 0;
2435 }
2436
2437 eh->tlsdesc_got = (bfd_vma) -1;
2438
2439 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2440 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2441 if (h->got.refcount > 0
2442 && info->executable
2443 && h->dynindx == -1
2444 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2445 h->got.offset = (bfd_vma) -1;
2446 else if (h->got.refcount > 0)
2447 {
2448 asection *s;
2449 bfd_boolean dyn;
2450 int tls_type = elf_i386_hash_entry(h)->tls_type;
2451
2452 /* Make sure this symbol is output as a dynamic symbol.
2453 Undefined weak syms won't yet be marked as dynamic. */
2454 if (h->dynindx == -1
2455 && !h->forced_local)
2456 {
2457 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2458 return FALSE;
2459 }
2460
2461 s = htab->elf.sgot;
2462 if (GOT_TLS_GDESC_P (tls_type))
2463 {
2464 eh->tlsdesc_got = htab->elf.sgotplt->size
2465 - elf_i386_compute_jump_table_size (htab);
2466 htab->elf.sgotplt->size += 8;
2467 h->got.offset = (bfd_vma) -2;
2468 }
2469 if (! GOT_TLS_GDESC_P (tls_type)
2470 || GOT_TLS_GD_P (tls_type))
2471 {
2472 h->got.offset = s->size;
2473 s->size += 4;
2474 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2475 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2476 s->size += 4;
2477 }
2478 dyn = htab->elf.dynamic_sections_created;
2479 /* R_386_TLS_IE_32 needs one dynamic relocation,
2480 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2481 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2482 need two), R_386_TLS_GD needs one if local symbol and two if
2483 global. */
2484 if (tls_type == GOT_TLS_IE_BOTH)
2485 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2486 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2487 || (tls_type & GOT_TLS_IE))
2488 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2489 else if (GOT_TLS_GD_P (tls_type))
2490 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2491 else if (! GOT_TLS_GDESC_P (tls_type)
2492 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2493 || h->root.type != bfd_link_hash_undefweak)
2494 && (info->shared
2495 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2496 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2497 if (GOT_TLS_GDESC_P (tls_type))
2498 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2499 }
2500 else
2501 h->got.offset = (bfd_vma) -1;
2502
2503 if (eh->dyn_relocs == NULL)
2504 return TRUE;
2505
2506 /* In the shared -Bsymbolic case, discard space allocated for
2507 dynamic pc-relative relocs against symbols which turn out to be
2508 defined in regular objects. For the normal shared case, discard
2509 space for pc-relative relocs that have become local due to symbol
2510 visibility changes. */
2511
2512 if (info->shared)
2513 {
2514 /* The only reloc that uses pc_count is R_386_PC32, which will
2515 appear on a call or on something like ".long foo - .". We
2516 want calls to protected symbols to resolve directly to the
2517 function rather than going via the plt. If people want
2518 function pointer comparisons to work as expected then they
2519 should avoid writing assembly like ".long foo - .". */
2520 if (SYMBOL_CALLS_LOCAL (info, h))
2521 {
2522 struct elf_dyn_relocs **pp;
2523
2524 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2525 {
2526 p->count -= p->pc_count;
2527 p->pc_count = 0;
2528 if (p->count == 0)
2529 *pp = p->next;
2530 else
2531 pp = &p->next;
2532 }
2533 }
2534
2535 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2536 {
2537 struct elf_dyn_relocs **pp;
2538 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2539 {
2540 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2541 *pp = p->next;
2542 else
2543 pp = &p->next;
2544 }
2545 }
2546
2547 /* Also discard relocs on undefined weak syms with non-default
2548 visibility. */
2549 if (eh->dyn_relocs != NULL
2550 && h->root.type == bfd_link_hash_undefweak)
2551 {
2552 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2553 eh->dyn_relocs = NULL;
2554
2555 /* Make sure undefined weak symbols are output as a dynamic
2556 symbol in PIEs. */
2557 else if (h->dynindx == -1
2558 && !h->forced_local)
2559 {
2560 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2561 return FALSE;
2562 }
2563 }
2564 }
2565 else if (ELIMINATE_COPY_RELOCS)
2566 {
2567 /* For the non-shared case, discard space for relocs against
2568 symbols which turn out to need copy relocs or are not
2569 dynamic. */
2570
2571 if (!h->non_got_ref
2572 && ((h->def_dynamic
2573 && !h->def_regular)
2574 || (htab->elf.dynamic_sections_created
2575 && (h->root.type == bfd_link_hash_undefweak
2576 || h->root.type == bfd_link_hash_undefined))))
2577 {
2578 /* Make sure this symbol is output as a dynamic symbol.
2579 Undefined weak syms won't yet be marked as dynamic. */
2580 if (h->dynindx == -1
2581 && !h->forced_local)
2582 {
2583 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2584 return FALSE;
2585 }
2586
2587 /* If that succeeded, we know we'll be keeping all the
2588 relocs. */
2589 if (h->dynindx != -1)
2590 goto keep;
2591 }
2592
2593 eh->dyn_relocs = NULL;
2594
2595 keep: ;
2596 }
2597
2598 /* Finally, allocate space. */
2599 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2600 {
2601 asection *sreloc;
2602
2603 sreloc = elf_section_data (p->sec)->sreloc;
2604
2605 BFD_ASSERT (sreloc != NULL);
2606 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2607 }
2608
2609 return TRUE;
2610 }
2611
2612 /* Allocate space in .plt, .got and associated reloc sections for
2613 local dynamic relocs. */
2614
2615 static bfd_boolean
2616 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2617 {
2618 struct elf_link_hash_entry *h
2619 = (struct elf_link_hash_entry *) *slot;
2620
2621 if (h->type != STT_GNU_IFUNC
2622 || !h->def_regular
2623 || !h->ref_regular
2624 || !h->forced_local
2625 || h->root.type != bfd_link_hash_defined)
2626 abort ();
2627
2628 return elf_i386_allocate_dynrelocs (h, inf);
2629 }
2630
2631 /* Find any dynamic relocs that apply to read-only sections. */
2632
2633 static bfd_boolean
2634 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2635 {
2636 struct elf_i386_link_hash_entry *eh;
2637 struct elf_dyn_relocs *p;
2638
2639 /* Skip local IFUNC symbols. */
2640 if (h->forced_local && h->type == STT_GNU_IFUNC)
2641 return TRUE;
2642
2643 eh = (struct elf_i386_link_hash_entry *) h;
2644 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2645 {
2646 asection *s = p->sec->output_section;
2647
2648 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2649 {
2650 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2651
2652 info->flags |= DF_TEXTREL;
2653
2654 if ((info->warn_shared_textrel && info->shared)
2655 || info->error_textrel)
2656 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2657 p->sec->owner, h->root.root.string,
2658 p->sec);
2659
2660 /* Not an error, just cut short the traversal. */
2661 return FALSE;
2662 }
2663 }
2664 return TRUE;
2665 }
2666
2667 /* Convert
2668 mov foo@GOT(%reg), %reg
2669 to
2670 lea foo@GOTOFF(%reg), %reg
2671 with the local symbol, foo. */
2672
2673 static bfd_boolean
2674 elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2675 struct bfd_link_info *link_info)
2676 {
2677 Elf_Internal_Shdr *symtab_hdr;
2678 Elf_Internal_Rela *internal_relocs;
2679 Elf_Internal_Rela *irel, *irelend;
2680 bfd_byte *contents;
2681 struct elf_i386_link_hash_table *htab;
2682 bfd_boolean changed_contents;
2683 bfd_boolean changed_relocs;
2684 bfd_signed_vma *local_got_refcounts;
2685
2686 /* Don't even try to convert non-ELF outputs. */
2687 if (!is_elf_hash_table (link_info->hash))
2688 return FALSE;
2689
2690 /* Nothing to do if there is no need or no output. */
2691 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2692 || sec->need_convert_mov_to_lea == 0
2693 || bfd_is_abs_section (sec->output_section))
2694 return TRUE;
2695
2696 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2697
2698 /* Load the relocations for this section. */
2699 internal_relocs = (_bfd_elf_link_read_relocs
2700 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2701 link_info->keep_memory));
2702 if (internal_relocs == NULL)
2703 return FALSE;
2704
2705 htab = elf_i386_hash_table (link_info);
2706 changed_contents = FALSE;
2707 changed_relocs = FALSE;
2708 local_got_refcounts = elf_local_got_refcounts (abfd);
2709
2710 /* Get the section contents. */
2711 if (elf_section_data (sec)->this_hdr.contents != NULL)
2712 contents = elf_section_data (sec)->this_hdr.contents;
2713 else
2714 {
2715 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2716 goto error_return;
2717 }
2718
2719 irelend = internal_relocs + sec->reloc_count;
2720 for (irel = internal_relocs; irel < irelend; irel++)
2721 {
2722 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2723 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2724 unsigned int indx;
2725 struct elf_link_hash_entry *h;
2726
2727 if (r_type != R_386_GOT32)
2728 continue;
2729
2730 /* Get the symbol referred to by the reloc. */
2731 if (r_symndx < symtab_hdr->sh_info)
2732 {
2733 Elf_Internal_Sym *isym;
2734
2735 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2736 abfd, r_symndx);
2737
2738 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2739 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2740 && irel->r_offset >= 2
2741 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
2742 {
2743 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
2744 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2745 if (local_got_refcounts != NULL
2746 && local_got_refcounts[r_symndx] > 0)
2747 local_got_refcounts[r_symndx] -= 1;
2748 changed_contents = TRUE;
2749 changed_relocs = TRUE;
2750 }
2751 continue;
2752 }
2753
2754 indx = r_symndx - symtab_hdr->sh_info;
2755 h = elf_sym_hashes (abfd)[indx];
2756 BFD_ASSERT (h != NULL);
2757
2758 while (h->root.type == bfd_link_hash_indirect
2759 || h->root.type == bfd_link_hash_warning)
2760 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2761
2762 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2763 optimizing _DYNAMIC since ld.so may use its link-time address. */
2764 if (h->def_regular
2765 && h->type != STT_GNU_IFUNC
2766 && h != htab->elf.hdynamic
2767 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2768 && irel->r_offset >= 2
2769 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
2770 {
2771 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
2772 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2773 if (h->got.refcount > 0)
2774 h->got.refcount -= 1;
2775 changed_contents = TRUE;
2776 changed_relocs = TRUE;
2777 }
2778 }
2779
2780 if (contents != NULL
2781 && elf_section_data (sec)->this_hdr.contents != contents)
2782 {
2783 if (!changed_contents && !link_info->keep_memory)
2784 free (contents);
2785 else
2786 {
2787 /* Cache the section contents for elf_link_input_bfd. */
2788 elf_section_data (sec)->this_hdr.contents = contents;
2789 }
2790 }
2791
2792 if (elf_section_data (sec)->relocs != internal_relocs)
2793 {
2794 if (!changed_relocs)
2795 free (internal_relocs);
2796 else
2797 elf_section_data (sec)->relocs = internal_relocs;
2798 }
2799
2800 return TRUE;
2801
2802 error_return:
2803 if (contents != NULL
2804 && elf_section_data (sec)->this_hdr.contents != contents)
2805 free (contents);
2806 if (internal_relocs != NULL
2807 && elf_section_data (sec)->relocs != internal_relocs)
2808 free (internal_relocs);
2809 return FALSE;
2810 }
2811
2812 /* Set the sizes of the dynamic sections. */
2813
2814 static bfd_boolean
2815 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2816 {
2817 struct elf_i386_link_hash_table *htab;
2818 bfd *dynobj;
2819 asection *s;
2820 bfd_boolean relocs;
2821 bfd *ibfd;
2822
2823 htab = elf_i386_hash_table (info);
2824 if (htab == NULL)
2825 return FALSE;
2826 dynobj = htab->elf.dynobj;
2827 if (dynobj == NULL)
2828 abort ();
2829
2830 if (htab->elf.dynamic_sections_created)
2831 {
2832 /* Set the contents of the .interp section to the interpreter. */
2833 if (info->executable)
2834 {
2835 s = bfd_get_linker_section (dynobj, ".interp");
2836 if (s == NULL)
2837 abort ();
2838 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2839 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2840 }
2841 }
2842
2843 /* Set up .got offsets for local syms, and space for local dynamic
2844 relocs. */
2845 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2846 {
2847 bfd_signed_vma *local_got;
2848 bfd_signed_vma *end_local_got;
2849 char *local_tls_type;
2850 bfd_vma *local_tlsdesc_gotent;
2851 bfd_size_type locsymcount;
2852 Elf_Internal_Shdr *symtab_hdr;
2853 asection *srel;
2854
2855 if (! is_i386_elf (ibfd))
2856 continue;
2857
2858 for (s = ibfd->sections; s != NULL; s = s->next)
2859 {
2860 struct elf_dyn_relocs *p;
2861
2862 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2863 return FALSE;
2864
2865 for (p = ((struct elf_dyn_relocs *)
2866 elf_section_data (s)->local_dynrel);
2867 p != NULL;
2868 p = p->next)
2869 {
2870 if (!bfd_is_abs_section (p->sec)
2871 && bfd_is_abs_section (p->sec->output_section))
2872 {
2873 /* Input section has been discarded, either because
2874 it is a copy of a linkonce section or due to
2875 linker script /DISCARD/, so we'll be discarding
2876 the relocs too. */
2877 }
2878 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2879 && strcmp (p->sec->output_section->name,
2880 ".tls_vars") == 0)
2881 {
2882 /* Relocations in vxworks .tls_vars sections are
2883 handled specially by the loader. */
2884 }
2885 else if (p->count != 0)
2886 {
2887 srel = elf_section_data (p->sec)->sreloc;
2888 srel->size += p->count * sizeof (Elf32_External_Rel);
2889 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2890 && (info->flags & DF_TEXTREL) == 0)
2891 {
2892 info->flags |= DF_TEXTREL;
2893 if ((info->warn_shared_textrel && info->shared)
2894 || info->error_textrel)
2895 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2896 p->sec->owner, p->sec);
2897 }
2898 }
2899 }
2900 }
2901
2902 local_got = elf_local_got_refcounts (ibfd);
2903 if (!local_got)
2904 continue;
2905
2906 symtab_hdr = &elf_symtab_hdr (ibfd);
2907 locsymcount = symtab_hdr->sh_info;
2908 end_local_got = local_got + locsymcount;
2909 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2910 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2911 s = htab->elf.sgot;
2912 srel = htab->elf.srelgot;
2913 for (; local_got < end_local_got;
2914 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2915 {
2916 *local_tlsdesc_gotent = (bfd_vma) -1;
2917 if (*local_got > 0)
2918 {
2919 if (GOT_TLS_GDESC_P (*local_tls_type))
2920 {
2921 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2922 - elf_i386_compute_jump_table_size (htab);
2923 htab->elf.sgotplt->size += 8;
2924 *local_got = (bfd_vma) -2;
2925 }
2926 if (! GOT_TLS_GDESC_P (*local_tls_type)
2927 || GOT_TLS_GD_P (*local_tls_type))
2928 {
2929 *local_got = s->size;
2930 s->size += 4;
2931 if (GOT_TLS_GD_P (*local_tls_type)
2932 || *local_tls_type == GOT_TLS_IE_BOTH)
2933 s->size += 4;
2934 }
2935 if (info->shared
2936 || GOT_TLS_GD_ANY_P (*local_tls_type)
2937 || (*local_tls_type & GOT_TLS_IE))
2938 {
2939 if (*local_tls_type == GOT_TLS_IE_BOTH)
2940 srel->size += 2 * sizeof (Elf32_External_Rel);
2941 else if (GOT_TLS_GD_P (*local_tls_type)
2942 || ! GOT_TLS_GDESC_P (*local_tls_type))
2943 srel->size += sizeof (Elf32_External_Rel);
2944 if (GOT_TLS_GDESC_P (*local_tls_type))
2945 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2946 }
2947 }
2948 else
2949 *local_got = (bfd_vma) -1;
2950 }
2951 }
2952
2953 if (htab->tls_ldm_got.refcount > 0)
2954 {
2955 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2956 relocs. */
2957 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2958 htab->elf.sgot->size += 8;
2959 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2960 }
2961 else
2962 htab->tls_ldm_got.offset = -1;
2963
2964 /* Allocate global sym .plt and .got entries, and space for global
2965 sym dynamic relocs. */
2966 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2967
2968 /* Allocate .plt and .got entries, and space for local symbols. */
2969 htab_traverse (htab->loc_hash_table,
2970 elf_i386_allocate_local_dynrelocs,
2971 info);
2972
2973 /* For every jump slot reserved in the sgotplt, reloc_count is
2974 incremented. However, when we reserve space for TLS descriptors,
2975 it's not incremented, so in order to compute the space reserved
2976 for them, it suffices to multiply the reloc count by the jump
2977 slot size.
2978
2979 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2980 so that R_386_IRELATIVE entries come last. */
2981 if (htab->elf.srelplt)
2982 {
2983 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2984 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2985 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2986 }
2987 else if (htab->elf.irelplt)
2988 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2989
2990
2991 if (htab->elf.sgotplt)
2992 {
2993 /* Don't allocate .got.plt section if there are no GOT nor PLT
2994 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2995 if ((htab->elf.hgot == NULL
2996 || !htab->elf.hgot->ref_regular_nonweak)
2997 && (htab->elf.sgotplt->size
2998 == get_elf_backend_data (output_bfd)->got_header_size)
2999 && (htab->elf.splt == NULL
3000 || htab->elf.splt->size == 0)
3001 && (htab->elf.sgot == NULL
3002 || htab->elf.sgot->size == 0)
3003 && (htab->elf.iplt == NULL
3004 || htab->elf.iplt->size == 0)
3005 && (htab->elf.igotplt == NULL
3006 || htab->elf.igotplt->size == 0))
3007 htab->elf.sgotplt->size = 0;
3008 }
3009
3010
3011 if (htab->plt_eh_frame != NULL
3012 && htab->elf.splt != NULL
3013 && htab->elf.splt->size != 0
3014 && !bfd_is_abs_section (htab->elf.splt->output_section)
3015 && _bfd_elf_eh_frame_present (info))
3016 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3017
3018 /* We now have determined the sizes of the various dynamic sections.
3019 Allocate memory for them. */
3020 relocs = FALSE;
3021 for (s = dynobj->sections; s != NULL; s = s->next)
3022 {
3023 bfd_boolean strip_section = TRUE;
3024
3025 if ((s->flags & SEC_LINKER_CREATED) == 0)
3026 continue;
3027
3028 if (s == htab->elf.splt
3029 || s == htab->elf.sgot)
3030 {
3031 /* Strip this section if we don't need it; see the
3032 comment below. */
3033 /* We'd like to strip these sections if they aren't needed, but if
3034 we've exported dynamic symbols from them we must leave them.
3035 It's too late to tell BFD to get rid of the symbols. */
3036
3037 if (htab->elf.hplt != NULL)
3038 strip_section = FALSE;
3039 }
3040 else if (s == htab->elf.sgotplt
3041 || s == htab->elf.iplt
3042 || s == htab->elf.igotplt
3043 || s == htab->plt_got
3044 || s == htab->plt_eh_frame
3045 || s == htab->sdynbss)
3046 {
3047 /* Strip these too. */
3048 }
3049 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3050 {
3051 if (s->size != 0
3052 && s != htab->elf.srelplt
3053 && s != htab->srelplt2)
3054 relocs = TRUE;
3055
3056 /* We use the reloc_count field as a counter if we need
3057 to copy relocs into the output file. */
3058 s->reloc_count = 0;
3059 }
3060 else
3061 {
3062 /* It's not one of our sections, so don't allocate space. */
3063 continue;
3064 }
3065
3066 if (s->size == 0)
3067 {
3068 /* If we don't need this section, strip it from the
3069 output file. This is mostly to handle .rel.bss and
3070 .rel.plt. We must create both sections in
3071 create_dynamic_sections, because they must be created
3072 before the linker maps input sections to output
3073 sections. The linker does that before
3074 adjust_dynamic_symbol is called, and it is that
3075 function which decides whether anything needs to go
3076 into these sections. */
3077 if (strip_section)
3078 s->flags |= SEC_EXCLUDE;
3079 continue;
3080 }
3081
3082 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3083 continue;
3084
3085 /* Allocate memory for the section contents. We use bfd_zalloc
3086 here in case unused entries are not reclaimed before the
3087 section's contents are written out. This should not happen,
3088 but this way if it does, we get a R_386_NONE reloc instead
3089 of garbage. */
3090 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3091 if (s->contents == NULL)
3092 return FALSE;
3093 }
3094
3095 if (htab->plt_eh_frame != NULL
3096 && htab->plt_eh_frame->contents != NULL)
3097 {
3098 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3099 sizeof (elf_i386_eh_frame_plt));
3100 bfd_put_32 (dynobj, htab->elf.splt->size,
3101 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3102 }
3103
3104 if (htab->elf.dynamic_sections_created)
3105 {
3106 /* Add some entries to the .dynamic section. We fill in the
3107 values later, in elf_i386_finish_dynamic_sections, but we
3108 must add the entries now so that we get the correct size for
3109 the .dynamic section. The DT_DEBUG entry is filled in by the
3110 dynamic linker and used by the debugger. */
3111 #define add_dynamic_entry(TAG, VAL) \
3112 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3113
3114 if (info->executable)
3115 {
3116 if (!add_dynamic_entry (DT_DEBUG, 0))
3117 return FALSE;
3118 }
3119
3120 if (htab->elf.splt->size != 0)
3121 {
3122 /* DT_PLTGOT is used by prelink even if there is no PLT
3123 relocation. */
3124 if (!add_dynamic_entry (DT_PLTGOT, 0))
3125 return FALSE;
3126
3127 if (htab->elf.srelplt->size != 0)
3128 {
3129 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3130 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3131 || !add_dynamic_entry (DT_JMPREL, 0))
3132 return FALSE;
3133 }
3134 }
3135
3136 if (relocs)
3137 {
3138 if (!add_dynamic_entry (DT_REL, 0)
3139 || !add_dynamic_entry (DT_RELSZ, 0)
3140 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3141 return FALSE;
3142
3143 /* If any dynamic relocs apply to a read-only section,
3144 then we need a DT_TEXTREL entry. */
3145 if ((info->flags & DF_TEXTREL) == 0)
3146 elf_link_hash_traverse (&htab->elf,
3147 elf_i386_readonly_dynrelocs, info);
3148
3149 if ((info->flags & DF_TEXTREL) != 0)
3150 {
3151 if (!add_dynamic_entry (DT_TEXTREL, 0))
3152 return FALSE;
3153 }
3154 }
3155 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3156 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3157 return FALSE;
3158 }
3159 #undef add_dynamic_entry
3160
3161 return TRUE;
3162 }
3163
3164 static bfd_boolean
3165 elf_i386_always_size_sections (bfd *output_bfd,
3166 struct bfd_link_info *info)
3167 {
3168 asection *tls_sec = elf_hash_table (info)->tls_sec;
3169
3170 if (tls_sec)
3171 {
3172 struct elf_link_hash_entry *tlsbase;
3173
3174 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3175 "_TLS_MODULE_BASE_",
3176 FALSE, FALSE, FALSE);
3177
3178 if (tlsbase && tlsbase->type == STT_TLS)
3179 {
3180 struct elf_i386_link_hash_table *htab;
3181 struct bfd_link_hash_entry *bh = NULL;
3182 const struct elf_backend_data *bed
3183 = get_elf_backend_data (output_bfd);
3184
3185 htab = elf_i386_hash_table (info);
3186 if (htab == NULL)
3187 return FALSE;
3188
3189 if (!(_bfd_generic_link_add_one_symbol
3190 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3191 tls_sec, 0, NULL, FALSE,
3192 bed->collect, &bh)))
3193 return FALSE;
3194
3195 htab->tls_module_base = bh;
3196
3197 tlsbase = (struct elf_link_hash_entry *)bh;
3198 tlsbase->def_regular = 1;
3199 tlsbase->other = STV_HIDDEN;
3200 tlsbase->root.linker_def = 1;
3201 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3202 }
3203 }
3204
3205 return TRUE;
3206 }
3207
3208 /* Set the correct type for an x86 ELF section. We do this by the
3209 section name, which is a hack, but ought to work. */
3210
3211 static bfd_boolean
3212 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3213 Elf_Internal_Shdr *hdr,
3214 asection *sec)
3215 {
3216 const char *name;
3217
3218 name = bfd_get_section_name (abfd, sec);
3219
3220 /* This is an ugly, but unfortunately necessary hack that is
3221 needed when producing EFI binaries on x86. It tells
3222 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3223 containing ELF relocation info. We need this hack in order to
3224 be able to generate ELF binaries that can be translated into
3225 EFI applications (which are essentially COFF objects). Those
3226 files contain a COFF ".reloc" section inside an ELFNN object,
3227 which would normally cause BFD to segfault because it would
3228 attempt to interpret this section as containing relocation
3229 entries for section "oc". With this hack enabled, ".reloc"
3230 will be treated as a normal data section, which will avoid the
3231 segfault. However, you won't be able to create an ELFNN binary
3232 with a section named "oc" that needs relocations, but that's
3233 the kind of ugly side-effects you get when detecting section
3234 types based on their names... In practice, this limitation is
3235 unlikely to bite. */
3236 if (strcmp (name, ".reloc") == 0)
3237 hdr->sh_type = SHT_PROGBITS;
3238
3239 return TRUE;
3240 }
3241
3242 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3243 executables. Rather than setting it to the beginning of the TLS
3244 section, we have to set it to the end. This function may be called
3245 multiple times, it is idempotent. */
3246
3247 static void
3248 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3249 {
3250 struct elf_i386_link_hash_table *htab;
3251 struct bfd_link_hash_entry *base;
3252
3253 if (!info->executable)
3254 return;
3255
3256 htab = elf_i386_hash_table (info);
3257 if (htab == NULL)
3258 return;
3259
3260 base = htab->tls_module_base;
3261 if (base == NULL)
3262 return;
3263
3264 base->u.def.value = htab->elf.tls_size;
3265 }
3266
3267 /* Return the base VMA address which should be subtracted from real addresses
3268 when resolving @dtpoff relocation.
3269 This is PT_TLS segment p_vaddr. */
3270
3271 static bfd_vma
3272 elf_i386_dtpoff_base (struct bfd_link_info *info)
3273 {
3274 /* If tls_sec is NULL, we should have signalled an error already. */
3275 if (elf_hash_table (info)->tls_sec == NULL)
3276 return 0;
3277 return elf_hash_table (info)->tls_sec->vma;
3278 }
3279
3280 /* Return the relocation value for @tpoff relocation
3281 if STT_TLS virtual address is ADDRESS. */
3282
3283 static bfd_vma
3284 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3285 {
3286 struct elf_link_hash_table *htab = elf_hash_table (info);
3287 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3288 bfd_vma static_tls_size;
3289
3290 /* If tls_sec is NULL, we should have signalled an error already. */
3291 if (htab->tls_sec == NULL)
3292 return 0;
3293
3294 /* Consider special static TLS alignment requirements. */
3295 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3296 return static_tls_size + htab->tls_sec->vma - address;
3297 }
3298
3299 /* Relocate an i386 ELF section. */
3300
3301 static bfd_boolean
3302 elf_i386_relocate_section (bfd *output_bfd,
3303 struct bfd_link_info *info,
3304 bfd *input_bfd,
3305 asection *input_section,
3306 bfd_byte *contents,
3307 Elf_Internal_Rela *relocs,
3308 Elf_Internal_Sym *local_syms,
3309 asection **local_sections)
3310 {
3311 struct elf_i386_link_hash_table *htab;
3312 Elf_Internal_Shdr *symtab_hdr;
3313 struct elf_link_hash_entry **sym_hashes;
3314 bfd_vma *local_got_offsets;
3315 bfd_vma *local_tlsdesc_gotents;
3316 Elf_Internal_Rela *rel;
3317 Elf_Internal_Rela *relend;
3318 bfd_boolean is_vxworks_tls;
3319 unsigned plt_entry_size;
3320
3321 BFD_ASSERT (is_i386_elf (input_bfd));
3322
3323 htab = elf_i386_hash_table (info);
3324 if (htab == NULL)
3325 return FALSE;
3326 symtab_hdr = &elf_symtab_hdr (input_bfd);
3327 sym_hashes = elf_sym_hashes (input_bfd);
3328 local_got_offsets = elf_local_got_offsets (input_bfd);
3329 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3330 /* We have to handle relocations in vxworks .tls_vars sections
3331 specially, because the dynamic loader is 'weird'. */
3332 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3333 && info->shared
3334 && !strcmp (input_section->output_section->name,
3335 ".tls_vars"));
3336
3337 elf_i386_set_tls_module_base (info);
3338
3339 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3340
3341 rel = relocs;
3342 relend = relocs + input_section->reloc_count;
3343 for (; rel < relend; rel++)
3344 {
3345 unsigned int r_type;
3346 reloc_howto_type *howto;
3347 unsigned long r_symndx;
3348 struct elf_link_hash_entry *h;
3349 struct elf_i386_link_hash_entry *eh;
3350 Elf_Internal_Sym *sym;
3351 asection *sec;
3352 bfd_vma off, offplt, plt_offset;
3353 bfd_vma relocation;
3354 bfd_boolean unresolved_reloc;
3355 bfd_reloc_status_type r;
3356 unsigned int indx;
3357 int tls_type;
3358 bfd_vma st_size;
3359 asection *resolved_plt;
3360
3361 r_type = ELF32_R_TYPE (rel->r_info);
3362 if (r_type == R_386_GNU_VTINHERIT
3363 || r_type == R_386_GNU_VTENTRY)
3364 continue;
3365
3366 if ((indx = r_type) >= R_386_standard
3367 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3368 >= R_386_ext - R_386_standard)
3369 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3370 >= R_386_irelative - R_386_ext))
3371 {
3372 (*_bfd_error_handler)
3373 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3374 input_bfd, input_section, r_type);
3375 bfd_set_error (bfd_error_bad_value);
3376 return FALSE;
3377 }
3378 howto = elf_howto_table + indx;
3379
3380 r_symndx = ELF32_R_SYM (rel->r_info);
3381 h = NULL;
3382 sym = NULL;
3383 sec = NULL;
3384 unresolved_reloc = FALSE;
3385 if (r_symndx < symtab_hdr->sh_info)
3386 {
3387 sym = local_syms + r_symndx;
3388 sec = local_sections[r_symndx];
3389 relocation = (sec->output_section->vma
3390 + sec->output_offset
3391 + sym->st_value);
3392 st_size = sym->st_size;
3393
3394 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3395 && ((sec->flags & SEC_MERGE) != 0
3396 || (info->relocatable
3397 && sec->output_offset != 0)))
3398 {
3399 bfd_vma addend;
3400 bfd_byte *where = contents + rel->r_offset;
3401
3402 switch (howto->size)
3403 {
3404 case 0:
3405 addend = bfd_get_8 (input_bfd, where);
3406 if (howto->pc_relative)
3407 {
3408 addend = (addend ^ 0x80) - 0x80;
3409 addend += 1;
3410 }
3411 break;
3412 case 1:
3413 addend = bfd_get_16 (input_bfd, where);
3414 if (howto->pc_relative)
3415 {
3416 addend = (addend ^ 0x8000) - 0x8000;
3417 addend += 2;
3418 }
3419 break;
3420 case 2:
3421 addend = bfd_get_32 (input_bfd, where);
3422 if (howto->pc_relative)
3423 {
3424 addend = (addend ^ 0x80000000) - 0x80000000;
3425 addend += 4;
3426 }
3427 break;
3428 default:
3429 abort ();
3430 }
3431
3432 if (info->relocatable)
3433 addend += sec->output_offset;
3434 else
3435 {
3436 asection *msec = sec;
3437 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3438 addend);
3439 addend -= relocation;
3440 addend += msec->output_section->vma + msec->output_offset;
3441 }
3442
3443 switch (howto->size)
3444 {
3445 case 0:
3446 /* FIXME: overflow checks. */
3447 if (howto->pc_relative)
3448 addend -= 1;
3449 bfd_put_8 (input_bfd, addend, where);
3450 break;
3451 case 1:
3452 if (howto->pc_relative)
3453 addend -= 2;
3454 bfd_put_16 (input_bfd, addend, where);
3455 break;
3456 case 2:
3457 if (howto->pc_relative)
3458 addend -= 4;
3459 bfd_put_32 (input_bfd, addend, where);
3460 break;
3461 }
3462 }
3463 else if (!info->relocatable
3464 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3465 {
3466 /* Relocate against local STT_GNU_IFUNC symbol. */
3467 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3468 FALSE);
3469 if (h == NULL)
3470 abort ();
3471
3472 /* Set STT_GNU_IFUNC symbol value. */
3473 h->root.u.def.value = sym->st_value;
3474 h->root.u.def.section = sec;
3475 }
3476 }
3477 else
3478 {
3479 bfd_boolean warned ATTRIBUTE_UNUSED;
3480 bfd_boolean ignored ATTRIBUTE_UNUSED;
3481
3482 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3483 r_symndx, symtab_hdr, sym_hashes,
3484 h, sec, relocation,
3485 unresolved_reloc, warned, ignored);
3486 st_size = h->size;
3487 }
3488
3489 if (sec != NULL && discarded_section (sec))
3490 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3491 rel, 1, relend, howto, 0, contents);
3492
3493 if (info->relocatable)
3494 continue;
3495
3496 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3497 it here if it is defined in a non-shared object. */
3498 if (h != NULL
3499 && h->type == STT_GNU_IFUNC
3500 && h->def_regular)
3501 {
3502 asection *plt, *gotplt, *base_got;
3503 bfd_vma plt_index;
3504 const char *name;
3505
3506 if ((input_section->flags & SEC_ALLOC) == 0
3507 || h->plt.offset == (bfd_vma) -1)
3508 abort ();
3509
3510 /* STT_GNU_IFUNC symbol must go through PLT. */
3511 if (htab->elf.splt != NULL)
3512 {
3513 plt = htab->elf.splt;
3514 gotplt = htab->elf.sgotplt;
3515 }
3516 else
3517 {
3518 plt = htab->elf.iplt;
3519 gotplt = htab->elf.igotplt;
3520 }
3521
3522 relocation = (plt->output_section->vma
3523 + plt->output_offset + h->plt.offset);
3524
3525 switch (r_type)
3526 {
3527 default:
3528 if (h->root.root.string)
3529 name = h->root.root.string;
3530 else
3531 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3532 NULL);
3533 (*_bfd_error_handler)
3534 (_("%B: relocation %s against STT_GNU_IFUNC "
3535 "symbol `%s' isn't handled by %s"), input_bfd,
3536 elf_howto_table[r_type].name,
3537 name, __FUNCTION__);
3538 bfd_set_error (bfd_error_bad_value);
3539 return FALSE;
3540
3541 case R_386_32:
3542 /* Generate dynamic relcoation only when there is a
3543 non-GOT reference in a shared object. */
3544 if (info->shared && h->non_got_ref)
3545 {
3546 Elf_Internal_Rela outrel;
3547 asection *sreloc;
3548 bfd_vma offset;
3549
3550 /* Need a dynamic relocation to get the real function
3551 adddress. */
3552 offset = _bfd_elf_section_offset (output_bfd,
3553 info,
3554 input_section,
3555 rel->r_offset);
3556 if (offset == (bfd_vma) -1
3557 || offset == (bfd_vma) -2)
3558 abort ();
3559
3560 outrel.r_offset = (input_section->output_section->vma
3561 + input_section->output_offset
3562 + offset);
3563
3564 if (h->dynindx == -1
3565 || h->forced_local
3566 || info->executable)
3567 {
3568 /* This symbol is resolved locally. */
3569 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3570 bfd_put_32 (output_bfd,
3571 (h->root.u.def.value
3572 + h->root.u.def.section->output_section->vma
3573 + h->root.u.def.section->output_offset),
3574 contents + offset);
3575 }
3576 else
3577 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3578
3579 sreloc = htab->elf.irelifunc;
3580 elf_append_rel (output_bfd, sreloc, &outrel);
3581
3582 /* If this reloc is against an external symbol, we
3583 do not want to fiddle with the addend. Otherwise,
3584 we need to include the symbol value so that it
3585 becomes an addend for the dynamic reloc. For an
3586 internal symbol, we have updated addend. */
3587 continue;
3588 }
3589 /* FALLTHROUGH */
3590 case R_386_PC32:
3591 case R_386_PLT32:
3592 goto do_relocation;
3593
3594 case R_386_GOT32:
3595 base_got = htab->elf.sgot;
3596 off = h->got.offset;
3597
3598 if (base_got == NULL)
3599 abort ();
3600
3601 if (off == (bfd_vma) -1)
3602 {
3603 /* We can't use h->got.offset here to save state, or
3604 even just remember the offset, as finish_dynamic_symbol
3605 would use that as offset into .got. */
3606
3607 if (htab->elf.splt != NULL)
3608 {
3609 plt_index = h->plt.offset / plt_entry_size - 1;
3610 off = (plt_index + 3) * 4;
3611 base_got = htab->elf.sgotplt;
3612 }
3613 else
3614 {
3615 plt_index = h->plt.offset / plt_entry_size;
3616 off = plt_index * 4;
3617 base_got = htab->elf.igotplt;
3618 }
3619
3620 if (h->dynindx == -1
3621 || h->forced_local
3622 || info->symbolic)
3623 {
3624 /* This references the local defitionion. We must
3625 initialize this entry in the global offset table.
3626 Since the offset must always be a multiple of 8,
3627 we use the least significant bit to record
3628 whether we have initialized it already.
3629
3630 When doing a dynamic link, we create a .rela.got
3631 relocation entry to initialize the value. This
3632 is done in the finish_dynamic_symbol routine. */
3633 if ((off & 1) != 0)
3634 off &= ~1;
3635 else
3636 {
3637 bfd_put_32 (output_bfd, relocation,
3638 base_got->contents + off);
3639 h->got.offset |= 1;
3640 }
3641 }
3642
3643 relocation = off;
3644
3645 /* Adjust for static executables. */
3646 if (htab->elf.splt == NULL)
3647 relocation += gotplt->output_offset;
3648 }
3649 else
3650 {
3651 relocation = (base_got->output_section->vma
3652 + base_got->output_offset + off
3653 - gotplt->output_section->vma
3654 - gotplt->output_offset);
3655 /* Adjust for static executables. */
3656 if (htab->elf.splt == NULL)
3657 relocation += gotplt->output_offset;
3658 }
3659
3660 goto do_relocation;
3661
3662 case R_386_GOTOFF:
3663 relocation -= (gotplt->output_section->vma
3664 + gotplt->output_offset);
3665 goto do_relocation;
3666 }
3667 }
3668
3669 switch (r_type)
3670 {
3671 case R_386_GOT32:
3672 /* Relocation is to the entry for this symbol in the global
3673 offset table. */
3674 if (htab->elf.sgot == NULL)
3675 abort ();
3676
3677 if (h != NULL)
3678 {
3679 bfd_boolean dyn;
3680
3681 off = h->got.offset;
3682 dyn = htab->elf.dynamic_sections_created;
3683 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3684 || (info->shared
3685 && SYMBOL_REFERENCES_LOCAL (info, h))
3686 || (ELF_ST_VISIBILITY (h->other)
3687 && h->root.type == bfd_link_hash_undefweak))
3688 {
3689 /* This is actually a static link, or it is a
3690 -Bsymbolic link and the symbol is defined
3691 locally, or the symbol was forced to be local
3692 because of a version file. We must initialize
3693 this entry in the global offset table. Since the
3694 offset must always be a multiple of 4, we use the
3695 least significant bit to record whether we have
3696 initialized it already.
3697
3698 When doing a dynamic link, we create a .rel.got
3699 relocation entry to initialize the value. This
3700 is done in the finish_dynamic_symbol routine. */
3701 if ((off & 1) != 0)
3702 off &= ~1;
3703 else
3704 {
3705 bfd_put_32 (output_bfd, relocation,
3706 htab->elf.sgot->contents + off);
3707 h->got.offset |= 1;
3708 }
3709 }
3710 else
3711 unresolved_reloc = FALSE;
3712 }
3713 else
3714 {
3715 if (local_got_offsets == NULL)
3716 abort ();
3717
3718 off = local_got_offsets[r_symndx];
3719
3720 /* The offset must always be a multiple of 4. We use
3721 the least significant bit to record whether we have
3722 already generated the necessary reloc. */
3723 if ((off & 1) != 0)
3724 off &= ~1;
3725 else
3726 {
3727 bfd_put_32 (output_bfd, relocation,
3728 htab->elf.sgot->contents + off);
3729
3730 if (info->shared)
3731 {
3732 asection *s;
3733 Elf_Internal_Rela outrel;
3734
3735 s = htab->elf.srelgot;
3736 if (s == NULL)
3737 abort ();
3738
3739 outrel.r_offset = (htab->elf.sgot->output_section->vma
3740 + htab->elf.sgot->output_offset
3741 + off);
3742 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3743 elf_append_rel (output_bfd, s, &outrel);
3744 }
3745
3746 local_got_offsets[r_symndx] |= 1;
3747 }
3748 }
3749
3750 if (off >= (bfd_vma) -2)
3751 abort ();
3752
3753 relocation = htab->elf.sgot->output_section->vma
3754 + htab->elf.sgot->output_offset + off
3755 - htab->elf.sgotplt->output_section->vma
3756 - htab->elf.sgotplt->output_offset;
3757 break;
3758
3759 case R_386_GOTOFF:
3760 /* Relocation is relative to the start of the global offset
3761 table. */
3762
3763 /* Check to make sure it isn't a protected function or data
3764 symbol for shared library since it may not be local when
3765 used as function address or with copy relocation. We also
3766 need to make sure that a symbol is referenced locally. */
3767 if (!info->executable && h)
3768 {
3769 if (!h->def_regular)
3770 {
3771 const char *v;
3772
3773 switch (ELF_ST_VISIBILITY (h->other))
3774 {
3775 case STV_HIDDEN:
3776 v = _("hidden symbol");
3777 break;
3778 case STV_INTERNAL:
3779 v = _("internal symbol");
3780 break;
3781 case STV_PROTECTED:
3782 v = _("protected symbol");
3783 break;
3784 default:
3785 v = _("symbol");
3786 break;
3787 }
3788
3789 (*_bfd_error_handler)
3790 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3791 input_bfd, v, h->root.root.string);
3792 bfd_set_error (bfd_error_bad_value);
3793 return FALSE;
3794 }
3795 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3796 && (h->type == STT_FUNC
3797 || h->type == STT_OBJECT)
3798 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3799 {
3800 (*_bfd_error_handler)
3801 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
3802 input_bfd,
3803 h->type == STT_FUNC ? "function" : "data",
3804 h->root.root.string);
3805 bfd_set_error (bfd_error_bad_value);
3806 return FALSE;
3807 }
3808 }
3809
3810 /* Note that sgot is not involved in this
3811 calculation. We always want the start of .got.plt. If we
3812 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3813 permitted by the ABI, we might have to change this
3814 calculation. */
3815 relocation -= htab->elf.sgotplt->output_section->vma
3816 + htab->elf.sgotplt->output_offset;
3817 break;
3818
3819 case R_386_GOTPC:
3820 /* Use global offset table as symbol value. */
3821 relocation = htab->elf.sgotplt->output_section->vma
3822 + htab->elf.sgotplt->output_offset;
3823 unresolved_reloc = FALSE;
3824 break;
3825
3826 case R_386_PLT32:
3827 /* Relocation is to the entry for this symbol in the
3828 procedure linkage table. */
3829
3830 /* Resolve a PLT32 reloc against a local symbol directly,
3831 without using the procedure linkage table. */
3832 if (h == NULL)
3833 break;
3834
3835 eh = (struct elf_i386_link_hash_entry *) h;
3836 if ((h->plt.offset == (bfd_vma) -1
3837 && eh->plt_got.offset == (bfd_vma) -1)
3838 || htab->elf.splt == NULL)
3839 {
3840 /* We didn't make a PLT entry for this symbol. This
3841 happens when statically linking PIC code, or when
3842 using -Bsymbolic. */
3843 break;
3844 }
3845
3846 if (h->plt.offset != (bfd_vma) -1)
3847 {
3848 resolved_plt = htab->elf.splt;
3849 plt_offset = h->plt.offset;
3850 }
3851 else
3852 {
3853 resolved_plt = htab->plt_got;
3854 plt_offset = eh->plt_got.offset;
3855 }
3856
3857 relocation = (resolved_plt->output_section->vma
3858 + resolved_plt->output_offset
3859 + plt_offset);
3860 unresolved_reloc = FALSE;
3861 break;
3862
3863 case R_386_SIZE32:
3864 /* Set to symbol size. */
3865 relocation = st_size;
3866 /* Fall through. */
3867
3868 case R_386_32:
3869 case R_386_PC32:
3870 if ((input_section->flags & SEC_ALLOC) == 0
3871 || is_vxworks_tls)
3872 break;
3873
3874 if ((info->shared
3875 && (h == NULL
3876 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3877 || h->root.type != bfd_link_hash_undefweak)
3878 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3879 || !SYMBOL_CALLS_LOCAL (info, h)))
3880 || (ELIMINATE_COPY_RELOCS
3881 && !info->shared
3882 && h != NULL
3883 && h->dynindx != -1
3884 && !h->non_got_ref
3885 && ((h->def_dynamic
3886 && !h->def_regular)
3887 || h->root.type == bfd_link_hash_undefweak
3888 || h->root.type == bfd_link_hash_undefined)))
3889 {
3890 Elf_Internal_Rela outrel;
3891 bfd_boolean skip, relocate;
3892 asection *sreloc;
3893
3894 /* When generating a shared object, these relocations
3895 are copied into the output file to be resolved at run
3896 time. */
3897
3898 skip = FALSE;
3899 relocate = FALSE;
3900
3901 outrel.r_offset =
3902 _bfd_elf_section_offset (output_bfd, info, input_section,
3903 rel->r_offset);
3904 if (outrel.r_offset == (bfd_vma) -1)
3905 skip = TRUE;
3906 else if (outrel.r_offset == (bfd_vma) -2)
3907 skip = TRUE, relocate = TRUE;
3908 outrel.r_offset += (input_section->output_section->vma
3909 + input_section->output_offset);
3910
3911 if (skip)
3912 memset (&outrel, 0, sizeof outrel);
3913 else if (h != NULL
3914 && h->dynindx != -1
3915 && (r_type == R_386_PC32
3916 || !info->shared
3917 || !SYMBOLIC_BIND (info, h)
3918 || !h->def_regular))
3919 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3920 else
3921 {
3922 /* This symbol is local, or marked to become local. */
3923 relocate = TRUE;
3924 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3925 }
3926
3927 sreloc = elf_section_data (input_section)->sreloc;
3928
3929 if (sreloc == NULL || sreloc->contents == NULL)
3930 {
3931 r = bfd_reloc_notsupported;
3932 goto check_relocation_error;
3933 }
3934
3935 elf_append_rel (output_bfd, sreloc, &outrel);
3936
3937 /* If this reloc is against an external symbol, we do
3938 not want to fiddle with the addend. Otherwise, we
3939 need to include the symbol value so that it becomes
3940 an addend for the dynamic reloc. */
3941 if (! relocate)
3942 continue;
3943 }
3944 break;
3945
3946 case R_386_TLS_IE:
3947 if (!info->executable)
3948 {
3949 Elf_Internal_Rela outrel;
3950 asection *sreloc;
3951
3952 outrel.r_offset = rel->r_offset
3953 + input_section->output_section->vma
3954 + input_section->output_offset;
3955 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3956 sreloc = elf_section_data (input_section)->sreloc;
3957 if (sreloc == NULL)
3958 abort ();
3959 elf_append_rel (output_bfd, sreloc, &outrel);
3960 }
3961 /* Fall through */
3962
3963 case R_386_TLS_GD:
3964 case R_386_TLS_GOTDESC:
3965 case R_386_TLS_DESC_CALL:
3966 case R_386_TLS_IE_32:
3967 case R_386_TLS_GOTIE:
3968 tls_type = GOT_UNKNOWN;
3969 if (h == NULL && local_got_offsets)
3970 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3971 else if (h != NULL)
3972 tls_type = elf_i386_hash_entry(h)->tls_type;
3973 if (tls_type == GOT_TLS_IE)
3974 tls_type = GOT_TLS_IE_NEG;
3975
3976 if (! elf_i386_tls_transition (info, input_bfd,
3977 input_section, contents,
3978 symtab_hdr, sym_hashes,
3979 &r_type, tls_type, rel,
3980 relend, h, r_symndx))
3981 return FALSE;
3982
3983 if (r_type == R_386_TLS_LE_32)
3984 {
3985 BFD_ASSERT (! unresolved_reloc);
3986 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3987 {
3988 unsigned int type;
3989 bfd_vma roff;
3990
3991 /* GD->LE transition. */
3992 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3993 if (type == 0x04)
3994 {
3995 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3996 Change it into:
3997 movl %gs:0, %eax; subl $foo@tpoff, %eax
3998 (6 byte form of subl). */
3999 memcpy (contents + rel->r_offset - 3,
4000 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4001 roff = rel->r_offset + 5;
4002 }
4003 else
4004 {
4005 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4006 Change it into:
4007 movl %gs:0, %eax; subl $foo@tpoff, %eax
4008 (6 byte form of subl). */
4009 memcpy (contents + rel->r_offset - 2,
4010 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4011 roff = rel->r_offset + 6;
4012 }
4013 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4014 contents + roff);
4015 /* Skip R_386_PC32/R_386_PLT32. */
4016 rel++;
4017 continue;
4018 }
4019 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4020 {
4021 /* GDesc -> LE transition.
4022 It's originally something like:
4023 leal x@tlsdesc(%ebx), %eax
4024
4025 leal x@ntpoff, %eax
4026
4027 Registers other than %eax may be set up here. */
4028
4029 unsigned int val;
4030 bfd_vma roff;
4031
4032 roff = rel->r_offset;
4033 val = bfd_get_8 (input_bfd, contents + roff - 1);
4034
4035 /* Now modify the instruction as appropriate. */
4036 /* aoliva FIXME: remove the above and xor the byte
4037 below with 0x86. */
4038 bfd_put_8 (output_bfd, val ^ 0x86,
4039 contents + roff - 1);
4040 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4041 contents + roff);
4042 continue;
4043 }
4044 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4045 {
4046 /* GDesc -> LE transition.
4047 It's originally:
4048 call *(%eax)
4049 Turn it into:
4050 xchg %ax,%ax */
4051
4052 bfd_vma roff;
4053
4054 roff = rel->r_offset;
4055 bfd_put_8 (output_bfd, 0x66, contents + roff);
4056 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4057 continue;
4058 }
4059 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4060 {
4061 unsigned int val;
4062
4063 /* IE->LE transition:
4064 Originally it can be one of:
4065 movl foo, %eax
4066 movl foo, %reg
4067 addl foo, %reg
4068 We change it into:
4069 movl $foo, %eax
4070 movl $foo, %reg
4071 addl $foo, %reg. */
4072 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4073 if (val == 0xa1)
4074 {
4075 /* movl foo, %eax. */
4076 bfd_put_8 (output_bfd, 0xb8,
4077 contents + rel->r_offset - 1);
4078 }
4079 else
4080 {
4081 unsigned int type;
4082
4083 type = bfd_get_8 (input_bfd,
4084 contents + rel->r_offset - 2);
4085 switch (type)
4086 {
4087 case 0x8b:
4088 /* movl */
4089 bfd_put_8 (output_bfd, 0xc7,
4090 contents + rel->r_offset - 2);
4091 bfd_put_8 (output_bfd,
4092 0xc0 | ((val >> 3) & 7),
4093 contents + rel->r_offset - 1);
4094 break;
4095 case 0x03:
4096 /* addl */
4097 bfd_put_8 (output_bfd, 0x81,
4098 contents + rel->r_offset - 2);
4099 bfd_put_8 (output_bfd,
4100 0xc0 | ((val >> 3) & 7),
4101 contents + rel->r_offset - 1);
4102 break;
4103 default:
4104 BFD_FAIL ();
4105 break;
4106 }
4107 }
4108 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4109 contents + rel->r_offset);
4110 continue;
4111 }
4112 else
4113 {
4114 unsigned int val, type;
4115
4116 /* {IE_32,GOTIE}->LE transition:
4117 Originally it can be one of:
4118 subl foo(%reg1), %reg2
4119 movl foo(%reg1), %reg2
4120 addl foo(%reg1), %reg2
4121 We change it into:
4122 subl $foo, %reg2
4123 movl $foo, %reg2 (6 byte form)
4124 addl $foo, %reg2. */
4125 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4126 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4127 if (type == 0x8b)
4128 {
4129 /* movl */
4130 bfd_put_8 (output_bfd, 0xc7,
4131 contents + rel->r_offset - 2);
4132 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4133 contents + rel->r_offset - 1);
4134 }
4135 else if (type == 0x2b)
4136 {
4137 /* subl */
4138 bfd_put_8 (output_bfd, 0x81,
4139 contents + rel->r_offset - 2);
4140 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4141 contents + rel->r_offset - 1);
4142 }
4143 else if (type == 0x03)
4144 {
4145 /* addl */
4146 bfd_put_8 (output_bfd, 0x81,
4147 contents + rel->r_offset - 2);
4148 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4149 contents + rel->r_offset - 1);
4150 }
4151 else
4152 BFD_FAIL ();
4153 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4154 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4155 contents + rel->r_offset);
4156 else
4157 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4158 contents + rel->r_offset);
4159 continue;
4160 }
4161 }
4162
4163 if (htab->elf.sgot == NULL)
4164 abort ();
4165
4166 if (h != NULL)
4167 {
4168 off = h->got.offset;
4169 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4170 }
4171 else
4172 {
4173 if (local_got_offsets == NULL)
4174 abort ();
4175
4176 off = local_got_offsets[r_symndx];
4177 offplt = local_tlsdesc_gotents[r_symndx];
4178 }
4179
4180 if ((off & 1) != 0)
4181 off &= ~1;
4182 else
4183 {
4184 Elf_Internal_Rela outrel;
4185 int dr_type;
4186 asection *sreloc;
4187
4188 if (htab->elf.srelgot == NULL)
4189 abort ();
4190
4191 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4192
4193 if (GOT_TLS_GDESC_P (tls_type))
4194 {
4195 bfd_byte *loc;
4196 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4197 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4198 <= htab->elf.sgotplt->size);
4199 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4200 + htab->elf.sgotplt->output_offset
4201 + offplt
4202 + htab->sgotplt_jump_table_size);
4203 sreloc = htab->elf.srelplt;
4204 loc = sreloc->contents;
4205 loc += (htab->next_tls_desc_index++
4206 * sizeof (Elf32_External_Rel));
4207 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4208 <= sreloc->contents + sreloc->size);
4209 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4210 if (indx == 0)
4211 {
4212 BFD_ASSERT (! unresolved_reloc);
4213 bfd_put_32 (output_bfd,
4214 relocation - elf_i386_dtpoff_base (info),
4215 htab->elf.sgotplt->contents + offplt
4216 + htab->sgotplt_jump_table_size + 4);
4217 }
4218 else
4219 {
4220 bfd_put_32 (output_bfd, 0,
4221 htab->elf.sgotplt->contents + offplt
4222 + htab->sgotplt_jump_table_size + 4);
4223 }
4224 }
4225
4226 sreloc = htab->elf.srelgot;
4227
4228 outrel.r_offset = (htab->elf.sgot->output_section->vma
4229 + htab->elf.sgot->output_offset + off);
4230
4231 if (GOT_TLS_GD_P (tls_type))
4232 dr_type = R_386_TLS_DTPMOD32;
4233 else if (GOT_TLS_GDESC_P (tls_type))
4234 goto dr_done;
4235 else if (tls_type == GOT_TLS_IE_POS)
4236 dr_type = R_386_TLS_TPOFF;
4237 else
4238 dr_type = R_386_TLS_TPOFF32;
4239
4240 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4241 bfd_put_32 (output_bfd,
4242 relocation - elf_i386_dtpoff_base (info),
4243 htab->elf.sgot->contents + off);
4244 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4245 bfd_put_32 (output_bfd,
4246 elf_i386_dtpoff_base (info) - relocation,
4247 htab->elf.sgot->contents + off);
4248 else if (dr_type != R_386_TLS_DESC)
4249 bfd_put_32 (output_bfd, 0,
4250 htab->elf.sgot->contents + off);
4251 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4252
4253 elf_append_rel (output_bfd, sreloc, &outrel);
4254
4255 if (GOT_TLS_GD_P (tls_type))
4256 {
4257 if (indx == 0)
4258 {
4259 BFD_ASSERT (! unresolved_reloc);
4260 bfd_put_32 (output_bfd,
4261 relocation - elf_i386_dtpoff_base (info),
4262 htab->elf.sgot->contents + off + 4);
4263 }
4264 else
4265 {
4266 bfd_put_32 (output_bfd, 0,
4267 htab->elf.sgot->contents + off + 4);
4268 outrel.r_info = ELF32_R_INFO (indx,
4269 R_386_TLS_DTPOFF32);
4270 outrel.r_offset += 4;
4271 elf_append_rel (output_bfd, sreloc, &outrel);
4272 }
4273 }
4274 else if (tls_type == GOT_TLS_IE_BOTH)
4275 {
4276 bfd_put_32 (output_bfd,
4277 (indx == 0
4278 ? relocation - elf_i386_dtpoff_base (info)
4279 : 0),
4280 htab->elf.sgot->contents + off + 4);
4281 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4282 outrel.r_offset += 4;
4283 elf_append_rel (output_bfd, sreloc, &outrel);
4284 }
4285
4286 dr_done:
4287 if (h != NULL)
4288 h->got.offset |= 1;
4289 else
4290 local_got_offsets[r_symndx] |= 1;
4291 }
4292
4293 if (off >= (bfd_vma) -2
4294 && ! GOT_TLS_GDESC_P (tls_type))
4295 abort ();
4296 if (r_type == R_386_TLS_GOTDESC
4297 || r_type == R_386_TLS_DESC_CALL)
4298 {
4299 relocation = htab->sgotplt_jump_table_size + offplt;
4300 unresolved_reloc = FALSE;
4301 }
4302 else if (r_type == ELF32_R_TYPE (rel->r_info))
4303 {
4304 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4305 + htab->elf.sgotplt->output_offset;
4306 relocation = htab->elf.sgot->output_section->vma
4307 + htab->elf.sgot->output_offset + off - g_o_t;
4308 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4309 && tls_type == GOT_TLS_IE_BOTH)
4310 relocation += 4;
4311 if (r_type == R_386_TLS_IE)
4312 relocation += g_o_t;
4313 unresolved_reloc = FALSE;
4314 }
4315 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4316 {
4317 unsigned int val, type;
4318 bfd_vma roff;
4319
4320 /* GD->IE transition. */
4321 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4322 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4323 if (type == 0x04)
4324 {
4325 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4326 Change it into:
4327 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4328 val >>= 3;
4329 roff = rel->r_offset - 3;
4330 }
4331 else
4332 {
4333 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4334 Change it into:
4335 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4336 roff = rel->r_offset - 2;
4337 }
4338 memcpy (contents + roff,
4339 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4340 contents[roff + 7] = 0x80 | (val & 7);
4341 /* If foo is used only with foo@gotntpoff(%reg) and
4342 foo@indntpoff, but not with foo@gottpoff(%reg), change
4343 subl $foo@gottpoff(%reg), %eax
4344 into:
4345 addl $foo@gotntpoff(%reg), %eax. */
4346 if (tls_type == GOT_TLS_IE_POS)
4347 contents[roff + 6] = 0x03;
4348 bfd_put_32 (output_bfd,
4349 htab->elf.sgot->output_section->vma
4350 + htab->elf.sgot->output_offset + off
4351 - htab->elf.sgotplt->output_section->vma
4352 - htab->elf.sgotplt->output_offset,
4353 contents + roff + 8);
4354 /* Skip R_386_PLT32. */
4355 rel++;
4356 continue;
4357 }
4358 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4359 {
4360 /* GDesc -> IE transition.
4361 It's originally something like:
4362 leal x@tlsdesc(%ebx), %eax
4363
4364 Change it to:
4365 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4366 or:
4367 movl x@gottpoff(%ebx), %eax # before negl %eax
4368
4369 Registers other than %eax may be set up here. */
4370
4371 bfd_vma roff;
4372
4373 /* First, make sure it's a leal adding ebx to a 32-bit
4374 offset into any register, although it's probably
4375 almost always going to be eax. */
4376 roff = rel->r_offset;
4377
4378 /* Now modify the instruction as appropriate. */
4379 /* To turn a leal into a movl in the form we use it, it
4380 suffices to change the first byte from 0x8d to 0x8b.
4381 aoliva FIXME: should we decide to keep the leal, all
4382 we have to do is remove the statement below, and
4383 adjust the relaxation of R_386_TLS_DESC_CALL. */
4384 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4385
4386 if (tls_type == GOT_TLS_IE_BOTH)
4387 off += 4;
4388
4389 bfd_put_32 (output_bfd,
4390 htab->elf.sgot->output_section->vma
4391 + htab->elf.sgot->output_offset + off
4392 - htab->elf.sgotplt->output_section->vma
4393 - htab->elf.sgotplt->output_offset,
4394 contents + roff);
4395 continue;
4396 }
4397 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4398 {
4399 /* GDesc -> IE transition.
4400 It's originally:
4401 call *(%eax)
4402
4403 Change it to:
4404 xchg %ax,%ax
4405 or
4406 negl %eax
4407 depending on how we transformed the TLS_GOTDESC above.
4408 */
4409
4410 bfd_vma roff;
4411
4412 roff = rel->r_offset;
4413
4414 /* Now modify the instruction as appropriate. */
4415 if (tls_type != GOT_TLS_IE_NEG)
4416 {
4417 /* xchg %ax,%ax */
4418 bfd_put_8 (output_bfd, 0x66, contents + roff);
4419 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4420 }
4421 else
4422 {
4423 /* negl %eax */
4424 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4425 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4426 }
4427
4428 continue;
4429 }
4430 else
4431 BFD_ASSERT (FALSE);
4432 break;
4433
4434 case R_386_TLS_LDM:
4435 if (! elf_i386_tls_transition (info, input_bfd,
4436 input_section, contents,
4437 symtab_hdr, sym_hashes,
4438 &r_type, GOT_UNKNOWN, rel,
4439 relend, h, r_symndx))
4440 return FALSE;
4441
4442 if (r_type != R_386_TLS_LDM)
4443 {
4444 /* LD->LE transition:
4445 leal foo(%reg), %eax; call ___tls_get_addr.
4446 We change it into:
4447 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4448 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4449 memcpy (contents + rel->r_offset - 2,
4450 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4451 /* Skip R_386_PC32/R_386_PLT32. */
4452 rel++;
4453 continue;
4454 }
4455
4456 if (htab->elf.sgot == NULL)
4457 abort ();
4458
4459 off = htab->tls_ldm_got.offset;
4460 if (off & 1)
4461 off &= ~1;
4462 else
4463 {
4464 Elf_Internal_Rela outrel;
4465
4466 if (htab->elf.srelgot == NULL)
4467 abort ();
4468
4469 outrel.r_offset = (htab->elf.sgot->output_section->vma
4470 + htab->elf.sgot->output_offset + off);
4471
4472 bfd_put_32 (output_bfd, 0,
4473 htab->elf.sgot->contents + off);
4474 bfd_put_32 (output_bfd, 0,
4475 htab->elf.sgot->contents + off + 4);
4476 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4477 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4478 htab->tls_ldm_got.offset |= 1;
4479 }
4480 relocation = htab->elf.sgot->output_section->vma
4481 + htab->elf.sgot->output_offset + off
4482 - htab->elf.sgotplt->output_section->vma
4483 - htab->elf.sgotplt->output_offset;
4484 unresolved_reloc = FALSE;
4485 break;
4486
4487 case R_386_TLS_LDO_32:
4488 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4489 relocation -= elf_i386_dtpoff_base (info);
4490 else
4491 /* When converting LDO to LE, we must negate. */
4492 relocation = -elf_i386_tpoff (info, relocation);
4493 break;
4494
4495 case R_386_TLS_LE_32:
4496 case R_386_TLS_LE:
4497 if (!info->executable)
4498 {
4499 Elf_Internal_Rela outrel;
4500 asection *sreloc;
4501
4502 outrel.r_offset = rel->r_offset
4503 + input_section->output_section->vma
4504 + input_section->output_offset;
4505 if (h != NULL && h->dynindx != -1)
4506 indx = h->dynindx;
4507 else
4508 indx = 0;
4509 if (r_type == R_386_TLS_LE_32)
4510 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4511 else
4512 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4513 sreloc = elf_section_data (input_section)->sreloc;
4514 if (sreloc == NULL)
4515 abort ();
4516 elf_append_rel (output_bfd, sreloc, &outrel);
4517 if (indx)
4518 continue;
4519 else if (r_type == R_386_TLS_LE_32)
4520 relocation = elf_i386_dtpoff_base (info) - relocation;
4521 else
4522 relocation -= elf_i386_dtpoff_base (info);
4523 }
4524 else if (r_type == R_386_TLS_LE_32)
4525 relocation = elf_i386_tpoff (info, relocation);
4526 else
4527 relocation = -elf_i386_tpoff (info, relocation);
4528 break;
4529
4530 default:
4531 break;
4532 }
4533
4534 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4535 because such sections are not SEC_ALLOC and thus ld.so will
4536 not process them. */
4537 if (unresolved_reloc
4538 && !((input_section->flags & SEC_DEBUGGING) != 0
4539 && h->def_dynamic)
4540 && _bfd_elf_section_offset (output_bfd, info, input_section,
4541 rel->r_offset) != (bfd_vma) -1)
4542 {
4543 (*_bfd_error_handler)
4544 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4545 input_bfd,
4546 input_section,
4547 (long) rel->r_offset,
4548 howto->name,
4549 h->root.root.string);
4550 return FALSE;
4551 }
4552
4553 do_relocation:
4554 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4555 contents, rel->r_offset,
4556 relocation, 0);
4557
4558 check_relocation_error:
4559 if (r != bfd_reloc_ok)
4560 {
4561 const char *name;
4562
4563 if (h != NULL)
4564 name = h->root.root.string;
4565 else
4566 {
4567 name = bfd_elf_string_from_elf_section (input_bfd,
4568 symtab_hdr->sh_link,
4569 sym->st_name);
4570 if (name == NULL)
4571 return FALSE;
4572 if (*name == '\0')
4573 name = bfd_section_name (input_bfd, sec);
4574 }
4575
4576 if (r == bfd_reloc_overflow)
4577 {
4578 if (! ((*info->callbacks->reloc_overflow)
4579 (info, (h ? &h->root : NULL), name, howto->name,
4580 (bfd_vma) 0, input_bfd, input_section,
4581 rel->r_offset)))
4582 return FALSE;
4583 }
4584 else
4585 {
4586 (*_bfd_error_handler)
4587 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4588 input_bfd, input_section,
4589 (long) rel->r_offset, name, (int) r);
4590 return FALSE;
4591 }
4592 }
4593 }
4594
4595 return TRUE;
4596 }
4597
4598 /* Finish up dynamic symbol handling. We set the contents of various
4599 dynamic sections here. */
4600
4601 static bfd_boolean
4602 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4603 struct bfd_link_info *info,
4604 struct elf_link_hash_entry *h,
4605 Elf_Internal_Sym *sym)
4606 {
4607 struct elf_i386_link_hash_table *htab;
4608 unsigned plt_entry_size;
4609 const struct elf_i386_backend_data *abed;
4610 struct elf_i386_link_hash_entry *eh;
4611
4612 htab = elf_i386_hash_table (info);
4613 if (htab == NULL)
4614 return FALSE;
4615
4616 abed = get_elf_i386_backend_data (output_bfd);
4617 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4618
4619 eh = (struct elf_i386_link_hash_entry *) h;
4620
4621 if (h->plt.offset != (bfd_vma) -1)
4622 {
4623 bfd_vma plt_index;
4624 bfd_vma got_offset;
4625 Elf_Internal_Rela rel;
4626 bfd_byte *loc;
4627 asection *plt, *gotplt, *relplt;
4628
4629 /* When building a static executable, use .iplt, .igot.plt and
4630 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4631 if (htab->elf.splt != NULL)
4632 {
4633 plt = htab->elf.splt;
4634 gotplt = htab->elf.sgotplt;
4635 relplt = htab->elf.srelplt;
4636 }
4637 else
4638 {
4639 plt = htab->elf.iplt;
4640 gotplt = htab->elf.igotplt;
4641 relplt = htab->elf.irelplt;
4642 }
4643
4644 /* This symbol has an entry in the procedure linkage table. Set
4645 it up. */
4646
4647 if ((h->dynindx == -1
4648 && !((h->forced_local || info->executable)
4649 && h->def_regular
4650 && h->type == STT_GNU_IFUNC))
4651 || plt == NULL
4652 || gotplt == NULL
4653 || relplt == NULL)
4654 abort ();
4655
4656 /* Get the index in the procedure linkage table which
4657 corresponds to this symbol. This is the index of this symbol
4658 in all the symbols for which we are making plt entries. The
4659 first entry in the procedure linkage table is reserved.
4660
4661 Get the offset into the .got table of the entry that
4662 corresponds to this function. Each .got entry is 4 bytes.
4663 The first three are reserved.
4664
4665 For static executables, we don't reserve anything. */
4666
4667 if (plt == htab->elf.splt)
4668 {
4669 got_offset = h->plt.offset / plt_entry_size - 1;
4670 got_offset = (got_offset + 3) * 4;
4671 }
4672 else
4673 {
4674 got_offset = h->plt.offset / plt_entry_size;
4675 got_offset = got_offset * 4;
4676 }
4677
4678 /* Fill in the entry in the procedure linkage table. */
4679 if (! info->shared)
4680 {
4681 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4682 abed->plt->plt_entry_size);
4683 bfd_put_32 (output_bfd,
4684 (gotplt->output_section->vma
4685 + gotplt->output_offset
4686 + got_offset),
4687 plt->contents + h->plt.offset
4688 + abed->plt->plt_got_offset);
4689
4690 if (abed->is_vxworks)
4691 {
4692 int s, k, reloc_index;
4693
4694 /* Create the R_386_32 relocation referencing the GOT
4695 for this PLT entry. */
4696
4697 /* S: Current slot number (zero-based). */
4698 s = ((h->plt.offset - abed->plt->plt_entry_size)
4699 / abed->plt->plt_entry_size);
4700 /* K: Number of relocations for PLTResolve. */
4701 if (info->shared)
4702 k = PLTRESOLVE_RELOCS_SHLIB;
4703 else
4704 k = PLTRESOLVE_RELOCS;
4705 /* Skip the PLTresolve relocations, and the relocations for
4706 the other PLT slots. */
4707 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4708 loc = (htab->srelplt2->contents + reloc_index
4709 * sizeof (Elf32_External_Rel));
4710
4711 rel.r_offset = (htab->elf.splt->output_section->vma
4712 + htab->elf.splt->output_offset
4713 + h->plt.offset + 2),
4714 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4715 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4716
4717 /* Create the R_386_32 relocation referencing the beginning of
4718 the PLT for this GOT entry. */
4719 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4720 + htab->elf.sgotplt->output_offset
4721 + got_offset);
4722 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4723 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4724 loc + sizeof (Elf32_External_Rel));
4725 }
4726 }
4727 else
4728 {
4729 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4730 abed->plt->plt_entry_size);
4731 bfd_put_32 (output_bfd, got_offset,
4732 plt->contents + h->plt.offset
4733 + abed->plt->plt_got_offset);
4734 }
4735
4736 /* Fill in the entry in the global offset table. */
4737 bfd_put_32 (output_bfd,
4738 (plt->output_section->vma
4739 + plt->output_offset
4740 + h->plt.offset
4741 + abed->plt->plt_lazy_offset),
4742 gotplt->contents + got_offset);
4743
4744 /* Fill in the entry in the .rel.plt section. */
4745 rel.r_offset = (gotplt->output_section->vma
4746 + gotplt->output_offset
4747 + got_offset);
4748 if (h->dynindx == -1
4749 || ((info->executable
4750 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4751 && h->def_regular
4752 && h->type == STT_GNU_IFUNC))
4753 {
4754 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4755 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4756 in the .got.plt section. */
4757 bfd_put_32 (output_bfd,
4758 (h->root.u.def.value
4759 + h->root.u.def.section->output_section->vma
4760 + h->root.u.def.section->output_offset),
4761 gotplt->contents + got_offset);
4762 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4763 /* R_386_IRELATIVE comes last. */
4764 plt_index = htab->next_irelative_index--;
4765 }
4766 else
4767 {
4768 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4769 plt_index = htab->next_jump_slot_index++;
4770 }
4771 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4772 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4773
4774 /* Don't fill PLT entry for static executables. */
4775 if (plt == htab->elf.splt)
4776 {
4777 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4778 plt->contents + h->plt.offset
4779 + abed->plt->plt_reloc_offset);
4780 bfd_put_32 (output_bfd, - (h->plt.offset
4781 + abed->plt->plt_plt_offset + 4),
4782 plt->contents + h->plt.offset
4783 + abed->plt->plt_plt_offset);
4784 }
4785 }
4786 else if (eh->plt_got.offset != (bfd_vma) -1)
4787 {
4788 bfd_vma got_offset, plt_offset;
4789 asection *plt, *got, *gotplt;
4790 const bfd_byte *got_plt_entry;
4791
4792 /* Offset of displacement of the indirect jump. */
4793 bfd_vma plt_got_offset = 2;
4794
4795 /* Set the entry in the GOT procedure linkage table. */
4796 plt = htab->plt_got;
4797 got = htab->elf.sgot;
4798 gotplt = htab->elf.sgotplt;
4799 got_offset = h->got.offset;
4800
4801 if (got_offset == (bfd_vma) -1
4802 || plt == NULL
4803 || got == NULL
4804 || gotplt == NULL)
4805 abort ();
4806
4807 /* Fill in the entry in the GOT procedure linkage table. */
4808 if (! info->shared)
4809 {
4810 got_plt_entry = elf_i386_got_plt_entry;
4811 got_offset += got->output_section->vma + got->output_offset;
4812 }
4813 else
4814 {
4815 got_plt_entry = elf_i386_pic_got_plt_entry;
4816 got_offset += (got->output_section->vma
4817 + got->output_offset
4818 - gotplt->output_section->vma
4819 - gotplt->output_offset);
4820 }
4821
4822 plt_offset = eh->plt_got.offset;
4823 memcpy (plt->contents + plt_offset, got_plt_entry,
4824 sizeof (elf_i386_got_plt_entry));
4825 bfd_put_32 (output_bfd, got_offset,
4826 plt->contents + plt_offset + plt_got_offset);
4827 }
4828
4829 if (!h->def_regular
4830 && (h->plt.offset != (bfd_vma) -1
4831 || eh->plt_got.offset != (bfd_vma) -1))
4832 {
4833 /* Mark the symbol as undefined, rather than as defined in
4834 the .plt section. Leave the value if there were any
4835 relocations where pointer equality matters (this is a clue
4836 for the dynamic linker, to make function pointer
4837 comparisons work between an application and shared
4838 library), otherwise set it to zero. If a function is only
4839 called from a binary, there is no need to slow down
4840 shared libraries because of that. */
4841 sym->st_shndx = SHN_UNDEF;
4842 if (!h->pointer_equality_needed)
4843 sym->st_value = 0;
4844 }
4845
4846 if (h->got.offset != (bfd_vma) -1
4847 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4848 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4849 {
4850 Elf_Internal_Rela rel;
4851
4852 /* This symbol has an entry in the global offset table. Set it
4853 up. */
4854
4855 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4856 abort ();
4857
4858 rel.r_offset = (htab->elf.sgot->output_section->vma
4859 + htab->elf.sgot->output_offset
4860 + (h->got.offset & ~(bfd_vma) 1));
4861
4862 /* If this is a static link, or it is a -Bsymbolic link and the
4863 symbol is defined locally or was forced to be local because
4864 of a version file, we just want to emit a RELATIVE reloc.
4865 The entry in the global offset table will already have been
4866 initialized in the relocate_section function. */
4867 if (h->def_regular
4868 && h->type == STT_GNU_IFUNC)
4869 {
4870 if (info->shared)
4871 {
4872 /* Generate R_386_GLOB_DAT. */
4873 goto do_glob_dat;
4874 }
4875 else
4876 {
4877 asection *plt;
4878
4879 if (!h->pointer_equality_needed)
4880 abort ();
4881
4882 /* For non-shared object, we can't use .got.plt, which
4883 contains the real function addres if we need pointer
4884 equality. We load the GOT entry with the PLT entry. */
4885 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4886 bfd_put_32 (output_bfd,
4887 (plt->output_section->vma
4888 + plt->output_offset + h->plt.offset),
4889 htab->elf.sgot->contents + h->got.offset);
4890 return TRUE;
4891 }
4892 }
4893 else if (info->shared
4894 && SYMBOL_REFERENCES_LOCAL (info, h))
4895 {
4896 BFD_ASSERT((h->got.offset & 1) != 0);
4897 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4898 }
4899 else
4900 {
4901 BFD_ASSERT((h->got.offset & 1) == 0);
4902 do_glob_dat:
4903 bfd_put_32 (output_bfd, (bfd_vma) 0,
4904 htab->elf.sgot->contents + h->got.offset);
4905 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4906 }
4907
4908 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
4909 }
4910
4911 if (h->needs_copy)
4912 {
4913 Elf_Internal_Rela rel;
4914
4915 /* This symbol needs a copy reloc. Set it up. */
4916
4917 if (h->dynindx == -1
4918 || (h->root.type != bfd_link_hash_defined
4919 && h->root.type != bfd_link_hash_defweak)
4920 || htab->srelbss == NULL)
4921 abort ();
4922
4923 rel.r_offset = (h->root.u.def.value
4924 + h->root.u.def.section->output_section->vma
4925 + h->root.u.def.section->output_offset);
4926 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4927 elf_append_rel (output_bfd, htab->srelbss, &rel);
4928 }
4929
4930 return TRUE;
4931 }
4932
4933 /* Finish up local dynamic symbol handling. We set the contents of
4934 various dynamic sections here. */
4935
4936 static bfd_boolean
4937 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4938 {
4939 struct elf_link_hash_entry *h
4940 = (struct elf_link_hash_entry *) *slot;
4941 struct bfd_link_info *info
4942 = (struct bfd_link_info *) inf;
4943
4944 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4945 h, NULL);
4946 }
4947
4948 /* Used to decide how to sort relocs in an optimal manner for the
4949 dynamic linker, before writing them out. */
4950
4951 static enum elf_reloc_type_class
4952 elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4953 const asection *rel_sec ATTRIBUTE_UNUSED,
4954 const Elf_Internal_Rela *rela)
4955 {
4956 switch (ELF32_R_TYPE (rela->r_info))
4957 {
4958 case R_386_RELATIVE:
4959 return reloc_class_relative;
4960 case R_386_JUMP_SLOT:
4961 return reloc_class_plt;
4962 case R_386_COPY:
4963 return reloc_class_copy;
4964 default:
4965 return reloc_class_normal;
4966 }
4967 }
4968
4969 /* Finish up the dynamic sections. */
4970
4971 static bfd_boolean
4972 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4973 struct bfd_link_info *info)
4974 {
4975 struct elf_i386_link_hash_table *htab;
4976 bfd *dynobj;
4977 asection *sdyn;
4978 const struct elf_i386_backend_data *abed;
4979
4980 htab = elf_i386_hash_table (info);
4981 if (htab == NULL)
4982 return FALSE;
4983
4984 dynobj = htab->elf.dynobj;
4985 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4986 abed = get_elf_i386_backend_data (output_bfd);
4987
4988 if (htab->elf.dynamic_sections_created)
4989 {
4990 Elf32_External_Dyn *dyncon, *dynconend;
4991
4992 if (sdyn == NULL || htab->elf.sgot == NULL)
4993 abort ();
4994
4995 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4996 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4997 for (; dyncon < dynconend; dyncon++)
4998 {
4999 Elf_Internal_Dyn dyn;
5000 asection *s;
5001
5002 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5003
5004 switch (dyn.d_tag)
5005 {
5006 default:
5007 if (abed->is_vxworks
5008 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5009 break;
5010 continue;
5011
5012 case DT_PLTGOT:
5013 s = htab->elf.sgotplt;
5014 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5015 break;
5016
5017 case DT_JMPREL:
5018 s = htab->elf.srelplt;
5019 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5020 break;
5021
5022 case DT_PLTRELSZ:
5023 s = htab->elf.srelplt;
5024 dyn.d_un.d_val = s->size;
5025 break;
5026
5027 case DT_RELSZ:
5028 /* My reading of the SVR4 ABI indicates that the
5029 procedure linkage table relocs (DT_JMPREL) should be
5030 included in the overall relocs (DT_REL). This is
5031 what Solaris does. However, UnixWare can not handle
5032 that case. Therefore, we override the DT_RELSZ entry
5033 here to make it not include the JMPREL relocs. */
5034 s = htab->elf.srelplt;
5035 if (s == NULL)
5036 continue;
5037 dyn.d_un.d_val -= s->size;
5038 break;
5039
5040 case DT_REL:
5041 /* We may not be using the standard ELF linker script.
5042 If .rel.plt is the first .rel section, we adjust
5043 DT_REL to not include it. */
5044 s = htab->elf.srelplt;
5045 if (s == NULL)
5046 continue;
5047 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5048 continue;
5049 dyn.d_un.d_ptr += s->size;
5050 break;
5051 }
5052
5053 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5054 }
5055
5056 /* Fill in the first entry in the procedure linkage table. */
5057 if (htab->elf.splt && htab->elf.splt->size > 0)
5058 {
5059 if (info->shared)
5060 {
5061 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5062 abed->plt->plt0_entry_size);
5063 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5064 abed->plt0_pad_byte,
5065 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5066 }
5067 else
5068 {
5069 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5070 abed->plt->plt0_entry_size);
5071 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5072 abed->plt0_pad_byte,
5073 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5074 bfd_put_32 (output_bfd,
5075 (htab->elf.sgotplt->output_section->vma
5076 + htab->elf.sgotplt->output_offset
5077 + 4),
5078 htab->elf.splt->contents
5079 + abed->plt->plt0_got1_offset);
5080 bfd_put_32 (output_bfd,
5081 (htab->elf.sgotplt->output_section->vma
5082 + htab->elf.sgotplt->output_offset
5083 + 8),
5084 htab->elf.splt->contents
5085 + abed->plt->plt0_got2_offset);
5086
5087 if (abed->is_vxworks)
5088 {
5089 Elf_Internal_Rela rel;
5090
5091 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5092 On IA32 we use REL relocations so the addend goes in
5093 the PLT directly. */
5094 rel.r_offset = (htab->elf.splt->output_section->vma
5095 + htab->elf.splt->output_offset
5096 + abed->plt->plt0_got1_offset);
5097 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5098 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5099 htab->srelplt2->contents);
5100 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5101 rel.r_offset = (htab->elf.splt->output_section->vma
5102 + htab->elf.splt->output_offset
5103 + abed->plt->plt0_got2_offset);
5104 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5105 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5106 htab->srelplt2->contents +
5107 sizeof (Elf32_External_Rel));
5108 }
5109 }
5110
5111 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5112 really seem like the right value. */
5113 elf_section_data (htab->elf.splt->output_section)
5114 ->this_hdr.sh_entsize = 4;
5115
5116 /* Correct the .rel.plt.unloaded relocations. */
5117 if (abed->is_vxworks && !info->shared)
5118 {
5119 int num_plts = (htab->elf.splt->size
5120 / abed->plt->plt_entry_size) - 1;
5121 unsigned char *p;
5122
5123 p = htab->srelplt2->contents;
5124 if (info->shared)
5125 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5126 else
5127 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5128
5129 for (; num_plts; num_plts--)
5130 {
5131 Elf_Internal_Rela rel;
5132 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5133 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5134 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5135 p += sizeof (Elf32_External_Rel);
5136
5137 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5138 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5139 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5140 p += sizeof (Elf32_External_Rel);
5141 }
5142 }
5143 }
5144 }
5145
5146 if (htab->elf.sgotplt)
5147 {
5148 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5149 {
5150 (*_bfd_error_handler)
5151 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5152 return FALSE;
5153 }
5154
5155 /* Fill in the first three entries in the global offset table. */
5156 if (htab->elf.sgotplt->size > 0)
5157 {
5158 bfd_put_32 (output_bfd,
5159 (sdyn == NULL ? 0
5160 : sdyn->output_section->vma + sdyn->output_offset),
5161 htab->elf.sgotplt->contents);
5162 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5163 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5164 }
5165
5166 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5167 }
5168
5169 /* Adjust .eh_frame for .plt section. */
5170 if (htab->plt_eh_frame != NULL
5171 && htab->plt_eh_frame->contents != NULL)
5172 {
5173 if (htab->elf.splt != NULL
5174 && htab->elf.splt->size != 0
5175 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5176 && htab->elf.splt->output_section != NULL
5177 && htab->plt_eh_frame->output_section != NULL)
5178 {
5179 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5180 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5181 + htab->plt_eh_frame->output_offset
5182 + PLT_FDE_START_OFFSET;
5183 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5184 htab->plt_eh_frame->contents
5185 + PLT_FDE_START_OFFSET);
5186 }
5187 if (htab->plt_eh_frame->sec_info_type
5188 == SEC_INFO_TYPE_EH_FRAME)
5189 {
5190 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5191 htab->plt_eh_frame,
5192 htab->plt_eh_frame->contents))
5193 return FALSE;
5194 }
5195 }
5196
5197 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5198 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5199
5200 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5201 htab_traverse (htab->loc_hash_table,
5202 elf_i386_finish_local_dynamic_symbol,
5203 info);
5204
5205 return TRUE;
5206 }
5207
5208 /* Return an array of PLT entry symbol values. */
5209
5210 static bfd_vma *
5211 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5212 asection *relplt)
5213 {
5214 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5215 arelent *p;
5216 long count, i;
5217 bfd_vma *plt_sym_val;
5218 bfd_vma plt_offset;
5219 bfd_byte *plt_contents;
5220 const struct elf_i386_backend_data *bed
5221 = get_elf_i386_backend_data (abfd);
5222 Elf_Internal_Shdr *hdr;
5223
5224 /* Get the .plt section contents. */
5225 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5226 if (plt_contents == NULL)
5227 return NULL;
5228 if (!bfd_get_section_contents (abfd, (asection *) plt,
5229 plt_contents, 0, plt->size))
5230 {
5231 bad_return:
5232 free (plt_contents);
5233 return NULL;
5234 }
5235
5236 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5237 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5238 goto bad_return;
5239
5240 hdr = &elf_section_data (relplt)->this_hdr;
5241 count = relplt->size / hdr->sh_entsize;
5242
5243 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5244 if (plt_sym_val == NULL)
5245 goto bad_return;
5246
5247 for (i = 0; i < count; i++)
5248 plt_sym_val[i] = -1;
5249
5250 plt_offset = bed->plt->plt_entry_size;
5251 p = relplt->relocation;
5252 for (i = 0; i < count; i++, p++)
5253 {
5254 long reloc_index;
5255
5256 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5257 if (p->howto == NULL)
5258 continue;
5259
5260 if (p->howto->type != R_386_JUMP_SLOT
5261 && p->howto->type != R_386_IRELATIVE)
5262 continue;
5263
5264 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5265 + bed->plt->plt_reloc_offset));
5266 reloc_index /= sizeof (Elf32_External_Rel);
5267 if (reloc_index >= count)
5268 abort ();
5269 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5270 plt_offset += bed->plt->plt_entry_size;
5271
5272 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5273 section. */
5274 if (plt_offset >= plt->size)
5275 break;
5276 }
5277
5278 free (plt_contents);
5279
5280 return plt_sym_val;
5281 }
5282
5283 /* Similar to _bfd_elf_get_synthetic_symtab. */
5284
5285 static long
5286 elf_i386_get_synthetic_symtab (bfd *abfd,
5287 long symcount,
5288 asymbol **syms,
5289 long dynsymcount,
5290 asymbol **dynsyms,
5291 asymbol **ret)
5292 {
5293 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5294 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5295 dynsymcount, dynsyms, ret,
5296 plt,
5297 elf_i386_get_plt_sym_val);
5298 }
5299
5300 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5301
5302 static bfd_boolean
5303 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5304 {
5305 if (h->plt.offset != (bfd_vma) -1
5306 && !h->def_regular
5307 && !h->pointer_equality_needed)
5308 return FALSE;
5309
5310 return _bfd_elf_hash_symbol (h);
5311 }
5312
5313 /* Hook called by the linker routine which adds symbols from an object
5314 file. */
5315
5316 static bfd_boolean
5317 elf_i386_add_symbol_hook (bfd * abfd,
5318 struct bfd_link_info * info,
5319 Elf_Internal_Sym * sym,
5320 const char ** namep ATTRIBUTE_UNUSED,
5321 flagword * flagsp ATTRIBUTE_UNUSED,
5322 asection ** secp ATTRIBUTE_UNUSED,
5323 bfd_vma * valp ATTRIBUTE_UNUSED)
5324 {
5325 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5326 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
5327 && (abfd->flags & DYNAMIC) == 0
5328 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
5329 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
5330
5331 return TRUE;
5332 }
5333
5334 #define TARGET_LITTLE_SYM i386_elf32_vec
5335 #define TARGET_LITTLE_NAME "elf32-i386"
5336 #define ELF_ARCH bfd_arch_i386
5337 #define ELF_TARGET_ID I386_ELF_DATA
5338 #define ELF_MACHINE_CODE EM_386
5339 #define ELF_MAXPAGESIZE 0x1000
5340
5341 #define elf_backend_can_gc_sections 1
5342 #define elf_backend_can_refcount 1
5343 #define elf_backend_want_got_plt 1
5344 #define elf_backend_plt_readonly 1
5345 #define elf_backend_want_plt_sym 0
5346 #define elf_backend_got_header_size 12
5347 #define elf_backend_plt_alignment 4
5348 #define elf_backend_extern_protected_data 1
5349
5350 /* Support RELA for objdump of prelink objects. */
5351 #define elf_info_to_howto elf_i386_info_to_howto_rel
5352 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5353
5354 #define bfd_elf32_mkobject elf_i386_mkobject
5355
5356 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5357 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5358 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5359 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5360 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5361
5362 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5363 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5364 #define elf_backend_check_relocs elf_i386_check_relocs
5365 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5366 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5367 #define elf_backend_fake_sections elf_i386_fake_sections
5368 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5369 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5370 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5371 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5372 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5373 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5374 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5375 #define elf_backend_relocate_section elf_i386_relocate_section
5376 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5377 #define elf_backend_always_size_sections elf_i386_always_size_sections
5378 #define elf_backend_omit_section_dynsym \
5379 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5380 #define elf_backend_hash_symbol elf_i386_hash_symbol
5381 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5382
5383 #include "elf32-target.h"
5384
5385 /* FreeBSD support. */
5386
5387 #undef TARGET_LITTLE_SYM
5388 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5389 #undef TARGET_LITTLE_NAME
5390 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5391 #undef ELF_OSABI
5392 #define ELF_OSABI ELFOSABI_FREEBSD
5393
5394 /* The kernel recognizes executables as valid only if they carry a
5395 "FreeBSD" label in the ELF header. So we put this label on all
5396 executables and (for simplicity) also all other object files. */
5397
5398 static void
5399 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5400 {
5401 _bfd_elf_post_process_headers (abfd, info);
5402
5403 #ifdef OLD_FREEBSD_ABI_LABEL
5404 {
5405 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5406 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5407 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5408 }
5409 #endif
5410 }
5411
5412 #undef elf_backend_post_process_headers
5413 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5414 #undef elf32_bed
5415 #define elf32_bed elf32_i386_fbsd_bed
5416
5417 #undef elf_backend_add_symbol_hook
5418
5419 #include "elf32-target.h"
5420
5421 /* Solaris 2. */
5422
5423 #undef TARGET_LITTLE_SYM
5424 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5425 #undef TARGET_LITTLE_NAME
5426 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5427
5428 #undef elf_backend_post_process_headers
5429
5430 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5431 objects won't be recognized. */
5432 #undef ELF_OSABI
5433
5434 #undef elf32_bed
5435 #define elf32_bed elf32_i386_sol2_bed
5436
5437 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5438 boundary. */
5439 #undef elf_backend_static_tls_alignment
5440 #define elf_backend_static_tls_alignment 8
5441
5442 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5443
5444 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5445 File, p.63. */
5446 #undef elf_backend_want_plt_sym
5447 #define elf_backend_want_plt_sym 1
5448
5449 #include "elf32-target.h"
5450
5451 /* Intel MCU support. */
5452
5453 static bfd_boolean
5454 elf32_iamcu_elf_object_p (bfd *abfd)
5455 {
5456 /* Set the right machine number for an IAMCU elf32 file. */
5457 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5458 return TRUE;
5459 }
5460
5461 #undef TARGET_LITTLE_SYM
5462 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5463 #undef TARGET_LITTLE_NAME
5464 #define TARGET_LITTLE_NAME "elf32-iamcu"
5465 #undef ELF_ARCH
5466 #define ELF_ARCH bfd_arch_iamcu
5467
5468 #undef ELF_MACHINE_CODE
5469 #define ELF_MACHINE_CODE EM_IAMCU
5470
5471 #undef ELF_OSABI
5472
5473 #undef elf32_bed
5474 #define elf32_bed elf32_iamcu_bed
5475
5476 #undef elf_backend_object_p
5477 #define elf_backend_object_p elf32_iamcu_elf_object_p
5478
5479 #undef elf_backend_static_tls_alignment
5480
5481 #undef elf_backend_want_plt_sym
5482 #define elf_backend_want_plt_sym 0
5483
5484 #include "elf32-target.h"
5485
5486 /* Restore defaults. */
5487 #undef ELF_ARCH
5488 #define ELF_ARCH bfd_arch_i386
5489 #undef ELF_MACHINE_CODE
5490 #define ELF_MACHINE_CODE EM_386
5491
5492 /* Native Client support. */
5493
5494 #undef TARGET_LITTLE_SYM
5495 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5496 #undef TARGET_LITTLE_NAME
5497 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5498 #undef elf32_bed
5499 #define elf32_bed elf32_i386_nacl_bed
5500
5501 #undef ELF_MAXPAGESIZE
5502 #define ELF_MAXPAGESIZE 0x10000
5503
5504 /* Restore defaults. */
5505 #undef ELF_OSABI
5506 #undef elf_backend_want_plt_sym
5507 #define elf_backend_want_plt_sym 0
5508 #undef elf_backend_post_process_headers
5509 #undef elf_backend_static_tls_alignment
5510
5511 /* NaCl uses substantially different PLT entries for the same effects. */
5512
5513 #undef elf_backend_plt_alignment
5514 #define elf_backend_plt_alignment 5
5515 #define NACL_PLT_ENTRY_SIZE 64
5516 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5517
5518 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5519 {
5520 0xff, 0x35, /* pushl contents of address */
5521 0, 0, 0, 0, /* replaced with address of .got + 4. */
5522 0x8b, 0x0d, /* movl contents of address, %ecx */
5523 0, 0, 0, 0, /* replaced with address of .got + 8. */
5524 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5525 0xff, 0xe1 /* jmp *%ecx */
5526 };
5527
5528 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5529 {
5530 0x8b, 0x0d, /* movl contents of address, %ecx */
5531 0, 0, 0, 0, /* replaced with GOT slot address. */
5532 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5533 0xff, 0xe1, /* jmp *%ecx */
5534
5535 /* Pad to the next 32-byte boundary with nop instructions. */
5536 0x90,
5537 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5538 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5539
5540 /* Lazy GOT entries point here (32-byte aligned). */
5541 0x68, /* pushl immediate */
5542 0, 0, 0, 0, /* replaced with reloc offset. */
5543 0xe9, /* jmp relative */
5544 0, 0, 0, 0, /* replaced with offset to .plt. */
5545
5546 /* Pad to the next 32-byte boundary with nop instructions. */
5547 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5548 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5549 0x90, 0x90
5550 };
5551
5552 static const bfd_byte
5553 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5554 {
5555 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5556 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5557 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5558 0xff, 0xe1, /* jmp *%ecx */
5559
5560 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5561 so pad to that size with nop instructions. */
5562 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5563 };
5564
5565 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5566 {
5567 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5568 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5569 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5570 0xff, 0xe1, /* jmp *%ecx */
5571
5572 /* Pad to the next 32-byte boundary with nop instructions. */
5573 0x90,
5574 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5575 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5576
5577 /* Lazy GOT entries point here (32-byte aligned). */
5578 0x68, /* pushl immediate */
5579 0, 0, 0, 0, /* replaced with offset into relocation table. */
5580 0xe9, /* jmp relative */
5581 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5582
5583 /* Pad to the next 32-byte boundary with nop instructions. */
5584 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5585 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5586 0x90, 0x90
5587 };
5588
5589 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5590 {
5591 #if (PLT_CIE_LENGTH != 20 \
5592 || PLT_FDE_LENGTH != 36 \
5593 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5594 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5595 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5596 #endif
5597 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5598 0, 0, 0, 0, /* CIE ID */
5599 1, /* CIE version */
5600 'z', 'R', 0, /* Augmentation string */
5601 1, /* Code alignment factor */
5602 0x7c, /* Data alignment factor: -4 */
5603 8, /* Return address column */
5604 1, /* Augmentation size */
5605 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5606 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5607 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5608 DW_CFA_nop, DW_CFA_nop,
5609
5610 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5611 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5612 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5613 0, 0, 0, 0, /* .plt size goes here */
5614 0, /* Augmentation size */
5615 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5616 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5617 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5618 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5619 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5620 13, /* Block length */
5621 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5622 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5623 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5624 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5625 DW_CFA_nop, DW_CFA_nop
5626 };
5627
5628 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5629 {
5630 elf_i386_nacl_plt0_entry, /* plt0_entry */
5631 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5632 2, /* plt0_got1_offset */
5633 8, /* plt0_got2_offset */
5634 elf_i386_nacl_plt_entry, /* plt_entry */
5635 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5636 2, /* plt_got_offset */
5637 33, /* plt_reloc_offset */
5638 38, /* plt_plt_offset */
5639 32, /* plt_lazy_offset */
5640 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5641 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5642 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5643 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5644 };
5645
5646 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5647 {
5648 &elf_i386_nacl_plt, /* plt */
5649 0x90, /* plt0_pad_byte: nop insn */
5650 0, /* is_vxworks */
5651 };
5652
5653 static bfd_boolean
5654 elf32_i386_nacl_elf_object_p (bfd *abfd)
5655 {
5656 /* Set the right machine number for a NaCl i386 ELF32 file. */
5657 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5658 return TRUE;
5659 }
5660
5661 #undef elf_backend_arch_data
5662 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5663
5664 #undef elf_backend_object_p
5665 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5666 #undef elf_backend_modify_segment_map
5667 #define elf_backend_modify_segment_map nacl_modify_segment_map
5668 #undef elf_backend_modify_program_headers
5669 #define elf_backend_modify_program_headers nacl_modify_program_headers
5670 #undef elf_backend_final_write_processing
5671 #define elf_backend_final_write_processing nacl_final_write_processing
5672
5673 #include "elf32-target.h"
5674
5675 /* Restore defaults. */
5676 #undef elf_backend_object_p
5677 #undef elf_backend_modify_segment_map
5678 #undef elf_backend_modify_program_headers
5679 #undef elf_backend_final_write_processing
5680
5681 /* VxWorks support. */
5682
5683 #undef TARGET_LITTLE_SYM
5684 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5685 #undef TARGET_LITTLE_NAME
5686 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5687 #undef ELF_OSABI
5688 #undef elf_backend_plt_alignment
5689 #define elf_backend_plt_alignment 4
5690
5691 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5692 {
5693 &elf_i386_plt, /* plt */
5694 0x90, /* plt0_pad_byte */
5695 1, /* is_vxworks */
5696 };
5697
5698 #undef elf_backend_arch_data
5699 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5700
5701 #undef elf_backend_relocs_compatible
5702 #undef elf_backend_add_symbol_hook
5703 #define elf_backend_add_symbol_hook \
5704 elf_vxworks_add_symbol_hook
5705 #undef elf_backend_link_output_symbol_hook
5706 #define elf_backend_link_output_symbol_hook \
5707 elf_vxworks_link_output_symbol_hook
5708 #undef elf_backend_emit_relocs
5709 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5710 #undef elf_backend_final_write_processing
5711 #define elf_backend_final_write_processing \
5712 elf_vxworks_final_write_processing
5713 #undef elf_backend_static_tls_alignment
5714
5715 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5716 define it. */
5717 #undef elf_backend_want_plt_sym
5718 #define elf_backend_want_plt_sym 1
5719
5720 #undef elf32_bed
5721 #define elf32_bed elf32_i386_vxworks_bed
5722
5723 #include "elf32-target.h"