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