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x86: Add _bfd_x86_elf_gc_mark_hook
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 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 "elfxx-x86.h"
22 #include "elf-nacl.h"
23 #include "elf-vxworks.h"
24 #include "dwarf2.h"
25 #include "opcode/i386.h"
26
27 /* 386 uses REL relocations instead of RELA. */
28 #define USE_REL 1
29
30 #include "elf/i386.h"
31
32 static reloc_howto_type elf_howto_table[]=
33 {
34 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
35 bfd_elf_generic_reloc, "R_386_NONE",
36 TRUE, 0x00000000, 0x00000000, FALSE),
37 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
38 bfd_elf_generic_reloc, "R_386_32",
39 TRUE, 0xffffffff, 0xffffffff, FALSE),
40 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
41 bfd_elf_generic_reloc, "R_386_PC32",
42 TRUE, 0xffffffff, 0xffffffff, TRUE),
43 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_GOT32",
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_PLT32",
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_COPY",
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
54 TRUE, 0xffffffff, 0xffffffff, FALSE),
55 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_RELATIVE",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_GOTOFF",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_GOTPC",
66 TRUE, 0xffffffff, 0xffffffff, TRUE),
67
68 /* We have a gap in the reloc numbers here.
69 R_386_standard counts the number up to this point, and
70 R_386_ext_offset is the value to subtract from a reloc type of
71 R_386_16 thru R_386_PC8 to form an index into this table. */
72 #define R_386_standard (R_386_GOTPC + 1)
73 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
74
75 /* These relocs are a GNU extension. */
76 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
78 TRUE, 0xffffffff, 0xffffffff, FALSE),
79 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_386_TLS_IE",
81 TRUE, 0xffffffff, 0xffffffff, FALSE),
82 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_LE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_GD",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_LDM",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_16",
96 TRUE, 0xffff, 0xffff, FALSE),
97 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_PC16",
99 TRUE, 0xffff, 0xffff, TRUE),
100 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_8",
102 TRUE, 0xff, 0xff, FALSE),
103 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
104 bfd_elf_generic_reloc, "R_386_PC8",
105 TRUE, 0xff, 0xff, TRUE),
106
107 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
108 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
109 /* These are common with Solaris TLS implementation. */
110 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
112 TRUE, 0xffffffff, 0xffffffff, FALSE),
113 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
115 TRUE, 0xffffffff, 0xffffffff, FALSE),
116 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
129 bfd_elf_generic_reloc, "R_386_SIZE32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
136 FALSE, 0, 0, FALSE),
137 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_DESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_386_IRELATIVE",
142 TRUE, 0xffffffff, 0xffffffff, FALSE),
143 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_GOT32X",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
146
147 /* Another gap. */
148 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
150
151 /* GNU extension to record C++ vtable hierarchy. */
152 HOWTO (R_386_GNU_VTINHERIT, /* type */
153 0, /* rightshift */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
155 0, /* bitsize */
156 FALSE, /* pc_relative */
157 0, /* bitpos */
158 complain_overflow_dont, /* complain_on_overflow */
159 NULL, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
161 FALSE, /* partial_inplace */
162 0, /* src_mask */
163 0, /* dst_mask */
164 FALSE), /* pcrel_offset */
165
166 /* GNU extension to record C++ vtable member usage. */
167 HOWTO (R_386_GNU_VTENTRY, /* type */
168 0, /* rightshift */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
170 0, /* bitsize */
171 FALSE, /* pc_relative */
172 0, /* bitpos */
173 complain_overflow_dont, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
176 FALSE, /* partial_inplace */
177 0, /* src_mask */
178 0, /* dst_mask */
179 FALSE) /* pcrel_offset */
180
181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
182
183 };
184
185 #ifdef DEBUG_GEN_RELOC
186 #define TRACE(str) \
187 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
188 #else
189 #define TRACE(str)
190 #endif
191
192 static reloc_howto_type *
193 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
194 bfd_reloc_code_real_type code)
195 {
196 switch (code)
197 {
198 case BFD_RELOC_NONE:
199 TRACE ("BFD_RELOC_NONE");
200 return &elf_howto_table[R_386_NONE];
201
202 case BFD_RELOC_32:
203 TRACE ("BFD_RELOC_32");
204 return &elf_howto_table[R_386_32];
205
206 case BFD_RELOC_CTOR:
207 TRACE ("BFD_RELOC_CTOR");
208 return &elf_howto_table[R_386_32];
209
210 case BFD_RELOC_32_PCREL:
211 TRACE ("BFD_RELOC_PC32");
212 return &elf_howto_table[R_386_PC32];
213
214 case BFD_RELOC_386_GOT32:
215 TRACE ("BFD_RELOC_386_GOT32");
216 return &elf_howto_table[R_386_GOT32];
217
218 case BFD_RELOC_386_PLT32:
219 TRACE ("BFD_RELOC_386_PLT32");
220 return &elf_howto_table[R_386_PLT32];
221
222 case BFD_RELOC_386_COPY:
223 TRACE ("BFD_RELOC_386_COPY");
224 return &elf_howto_table[R_386_COPY];
225
226 case BFD_RELOC_386_GLOB_DAT:
227 TRACE ("BFD_RELOC_386_GLOB_DAT");
228 return &elf_howto_table[R_386_GLOB_DAT];
229
230 case BFD_RELOC_386_JUMP_SLOT:
231 TRACE ("BFD_RELOC_386_JUMP_SLOT");
232 return &elf_howto_table[R_386_JUMP_SLOT];
233
234 case BFD_RELOC_386_RELATIVE:
235 TRACE ("BFD_RELOC_386_RELATIVE");
236 return &elf_howto_table[R_386_RELATIVE];
237
238 case BFD_RELOC_386_GOTOFF:
239 TRACE ("BFD_RELOC_386_GOTOFF");
240 return &elf_howto_table[R_386_GOTOFF];
241
242 case BFD_RELOC_386_GOTPC:
243 TRACE ("BFD_RELOC_386_GOTPC");
244 return &elf_howto_table[R_386_GOTPC];
245
246 /* These relocs are a GNU extension. */
247 case BFD_RELOC_386_TLS_TPOFF:
248 TRACE ("BFD_RELOC_386_TLS_TPOFF");
249 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
250
251 case BFD_RELOC_386_TLS_IE:
252 TRACE ("BFD_RELOC_386_TLS_IE");
253 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
254
255 case BFD_RELOC_386_TLS_GOTIE:
256 TRACE ("BFD_RELOC_386_TLS_GOTIE");
257 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
258
259 case BFD_RELOC_386_TLS_LE:
260 TRACE ("BFD_RELOC_386_TLS_LE");
261 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
262
263 case BFD_RELOC_386_TLS_GD:
264 TRACE ("BFD_RELOC_386_TLS_GD");
265 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
266
267 case BFD_RELOC_386_TLS_LDM:
268 TRACE ("BFD_RELOC_386_TLS_LDM");
269 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
270
271 case BFD_RELOC_16:
272 TRACE ("BFD_RELOC_16");
273 return &elf_howto_table[R_386_16 - R_386_ext_offset];
274
275 case BFD_RELOC_16_PCREL:
276 TRACE ("BFD_RELOC_16_PCREL");
277 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
278
279 case BFD_RELOC_8:
280 TRACE ("BFD_RELOC_8");
281 return &elf_howto_table[R_386_8 - R_386_ext_offset];
282
283 case BFD_RELOC_8_PCREL:
284 TRACE ("BFD_RELOC_8_PCREL");
285 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
286
287 /* Common with Sun TLS implementation. */
288 case BFD_RELOC_386_TLS_LDO_32:
289 TRACE ("BFD_RELOC_386_TLS_LDO_32");
290 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
291
292 case BFD_RELOC_386_TLS_IE_32:
293 TRACE ("BFD_RELOC_386_TLS_IE_32");
294 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
295
296 case BFD_RELOC_386_TLS_LE_32:
297 TRACE ("BFD_RELOC_386_TLS_LE_32");
298 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
299
300 case BFD_RELOC_386_TLS_DTPMOD32:
301 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
302 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
303
304 case BFD_RELOC_386_TLS_DTPOFF32:
305 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
306 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
307
308 case BFD_RELOC_386_TLS_TPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
310 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
311
312 case BFD_RELOC_SIZE32:
313 TRACE ("BFD_RELOC_SIZE32");
314 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
315
316 case BFD_RELOC_386_TLS_GOTDESC:
317 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
318 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
319
320 case BFD_RELOC_386_TLS_DESC_CALL:
321 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
322 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
323
324 case BFD_RELOC_386_TLS_DESC:
325 TRACE ("BFD_RELOC_386_TLS_DESC");
326 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
327
328 case BFD_RELOC_386_IRELATIVE:
329 TRACE ("BFD_RELOC_386_IRELATIVE");
330 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
331
332 case BFD_RELOC_386_GOT32X:
333 TRACE ("BFD_RELOC_386_GOT32X");
334 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
335
336 case BFD_RELOC_VTABLE_INHERIT:
337 TRACE ("BFD_RELOC_VTABLE_INHERIT");
338 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
339
340 case BFD_RELOC_VTABLE_ENTRY:
341 TRACE ("BFD_RELOC_VTABLE_ENTRY");
342 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
343
344 default:
345 break;
346 }
347
348 TRACE ("Unknown");
349 return 0;
350 }
351
352 static reloc_howto_type *
353 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
354 const char *r_name)
355 {
356 unsigned int i;
357
358 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
359 if (elf_howto_table[i].name != NULL
360 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
361 return &elf_howto_table[i];
362
363 return NULL;
364 }
365
366 static reloc_howto_type *
367 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
368 {
369 unsigned int indx;
370
371 if ((indx = r_type) >= R_386_standard
372 && ((indx = r_type - R_386_ext_offset) - R_386_standard
373 >= R_386_ext - R_386_standard)
374 && ((indx = r_type - R_386_tls_offset) - R_386_ext
375 >= R_386_ext2 - R_386_ext)
376 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
377 >= R_386_vt - R_386_ext2))
378 {
379 /* xgettext:c-format */
380 _bfd_error_handler (_("%B: invalid relocation type %d"),
381 abfd, (int) r_type);
382 indx = R_386_NONE;
383 }
384 /* PR 17512: file: 0f67f69d. */
385 if (elf_howto_table [indx].type != r_type)
386 return NULL;
387 return &elf_howto_table[indx];
388 }
389
390 static void
391 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
392 arelent *cache_ptr,
393 Elf_Internal_Rela *dst)
394 {
395 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
396 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
397 }
398
399 /* Return whether a symbol name implies a local label. The UnixWare
400 2.1 cc generates temporary symbols that start with .X, so we
401 recognize them here. FIXME: do other SVR4 compilers also use .X?.
402 If so, we should move the .X recognition into
403 _bfd_elf_is_local_label_name. */
404
405 static bfd_boolean
406 elf_i386_is_local_label_name (bfd *abfd, const char *name)
407 {
408 if (name[0] == '.' && name[1] == 'X')
409 return TRUE;
410
411 return _bfd_elf_is_local_label_name (abfd, name);
412 }
413 \f
414 /* Support for core dump NOTE sections. */
415
416 static bfd_boolean
417 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
418 {
419 int offset;
420 size_t size;
421
422 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
423 {
424 int pr_version = bfd_get_32 (abfd, note->descdata);
425
426 if (pr_version != 1)
427 return FALSE;
428
429 /* pr_cursig */
430 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
431
432 /* pr_pid */
433 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
434
435 /* pr_reg */
436 offset = 28;
437 size = bfd_get_32 (abfd, note->descdata + 8);
438 }
439 else
440 {
441 switch (note->descsz)
442 {
443 default:
444 return FALSE;
445
446 case 144: /* Linux/i386 */
447 /* pr_cursig */
448 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
449
450 /* pr_pid */
451 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
452
453 /* pr_reg */
454 offset = 72;
455 size = 68;
456
457 break;
458 }
459 }
460
461 /* Make a ".reg/999" section. */
462 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
463 size, note->descpos + offset);
464 }
465
466 static bfd_boolean
467 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
468 {
469 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
470 {
471 int pr_version = bfd_get_32 (abfd, note->descdata);
472
473 if (pr_version != 1)
474 return FALSE;
475
476 elf_tdata (abfd)->core->program
477 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
478 elf_tdata (abfd)->core->command
479 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
480 }
481 else
482 {
483 switch (note->descsz)
484 {
485 default:
486 return FALSE;
487
488 case 124: /* Linux/i386 elf_prpsinfo. */
489 elf_tdata (abfd)->core->pid
490 = bfd_get_32 (abfd, note->descdata + 12);
491 elf_tdata (abfd)->core->program
492 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
493 elf_tdata (abfd)->core->command
494 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
495 }
496 }
497
498 /* Note that for some reason, a spurious space is tacked
499 onto the end of the args in some (at least one anyway)
500 implementations, so strip it off if it exists. */
501 {
502 char *command = elf_tdata (abfd)->core->command;
503 int n = strlen (command);
504
505 if (0 < n && command[n - 1] == ' ')
506 command[n - 1] = '\0';
507 }
508
509 return TRUE;
510 }
511 \f
512 /* Functions for the i386 ELF linker.
513
514 In order to gain some understanding of code in this file without
515 knowing all the intricate details of the linker, note the
516 following:
517
518 Functions named elf_i386_* are called by external routines, other
519 functions are only called locally. elf_i386_* functions appear
520 in this file more or less in the order in which they are called
521 from external routines. eg. elf_i386_check_relocs is called
522 early in the link process, elf_i386_finish_dynamic_sections is
523 one of the last functions. */
524
525 /* The size in bytes of an entry in the lazy procedure linkage table. */
526
527 #define LAZY_PLT_ENTRY_SIZE 16
528
529 /* The size in bytes of an entry in the non-lazy procedure linkage
530 table. */
531
532 #define NON_LAZY_PLT_ENTRY_SIZE 8
533
534 /* The first entry in an absolute lazy procedure linkage table looks
535 like this. See the SVR4 ABI i386 supplement to see how this works.
536 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
537
538 static const bfd_byte elf_i386_lazy_plt0_entry[12] =
539 {
540 0xff, 0x35, /* pushl contents of address */
541 0, 0, 0, 0, /* replaced with address of .got + 4. */
542 0xff, 0x25, /* jmp indirect */
543 0, 0, 0, 0 /* replaced with address of .got + 8. */
544 };
545
546 /* Subsequent entries in an absolute lazy procedure linkage table look
547 like this. */
548
549 static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
550 {
551 0xff, 0x25, /* jmp indirect */
552 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
553 0x68, /* pushl immediate */
554 0, 0, 0, 0, /* replaced with offset into relocation table. */
555 0xe9, /* jmp relative */
556 0, 0, 0, 0 /* replaced with offset to start of .plt. */
557 };
558
559 /* The first entry in a PIC lazy procedure linkage table look like
560 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
561 lazy_plt->plt0_pad_byte. */
562
563 static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
564 {
565 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
566 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
567 };
568
569 /* Subsequent entries in a PIC lazy procedure linkage table look like
570 this. */
571
572 static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
573 {
574 0xff, 0xa3, /* jmp *offset(%ebx) */
575 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
576 0x68, /* pushl immediate */
577 0, 0, 0, 0, /* replaced with offset into relocation table. */
578 0xe9, /* jmp relative */
579 0, 0, 0, 0 /* replaced with offset to start of .plt. */
580 };
581
582 /* Entries in the non-lazy procedure linkage table look like this. */
583
584 static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
585 {
586 0xff, 0x25, /* jmp indirect */
587 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
588 0x66, 0x90 /* xchg %ax,%ax */
589 };
590
591 /* Entries in the PIC non-lazy procedure linkage table look like
592 this. */
593
594 static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
595 {
596 0xff, 0xa3, /* jmp *offset(%ebx) */
597 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
598 0x66, 0x90 /* xchg %ax,%ax */
599 };
600
601 /* The first entry in an absolute IBT-enabled lazy procedure linkage
602 table looks like this. */
603
604 static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
605 {
606 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
607 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
608 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
609 };
610
611 /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
612 table look like this. Subsequent entries for a PIC IBT-enabled lazy
613 procedure linkage table are the same. */
614
615 static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
616 {
617 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
618 0x68, 0, 0, 0, 0, /* pushl immediate */
619 0xe9, 0, 0, 0, 0, /* jmp relative */
620 0x66, 0x90 /* xchg %ax,%ax */
621 };
622
623 /* The first entry in a PIC IBT-enabled lazy procedure linkage table
624 look like. */
625
626 static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
627 {
628 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
629 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
630 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
631 };
632
633 /* Entries for branches with IBT-enabled in the absolute non-lazey
634 procedure linkage table look like this. They have the same size
635 as the lazy PLT entry. */
636
637 static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
638 {
639 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
640 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
641 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
642 };
643
644 /* Entries for branches with IBT-enabled in the PIC non-lazey procedure
645 linkage table look like this. They have the same size as the lazy
646 PLT entry. */
647
648 static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
649 {
650 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
651 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
652 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
653 };
654
655 /* .eh_frame covering the lazy .plt section. */
656
657 static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
658 {
659 #define PLT_CIE_LENGTH 20
660 #define PLT_FDE_LENGTH 36
661 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
662 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
663 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
664 0, 0, 0, 0, /* CIE ID */
665 1, /* CIE version */
666 'z', 'R', 0, /* Augmentation string */
667 1, /* Code alignment factor */
668 0x7c, /* Data alignment factor */
669 8, /* Return address column */
670 1, /* Augmentation size */
671 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
672 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
673 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
674 DW_CFA_nop, DW_CFA_nop,
675
676 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
677 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
678 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
679 0, 0, 0, 0, /* .plt size goes here */
680 0, /* Augmentation size */
681 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
682 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
683 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
684 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
685 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
686 11, /* Block length */
687 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
688 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
689 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
690 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
691 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
692 };
693
694 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
695
696 static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
697 {
698 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
699 0, 0, 0, 0, /* CIE ID */
700 1, /* CIE version */
701 'z', 'R', 0, /* Augmentation string */
702 1, /* Code alignment factor */
703 0x7c, /* Data alignment factor */
704 8, /* Return address column */
705 1, /* Augmentation size */
706 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
707 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
708 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
709 DW_CFA_nop, DW_CFA_nop,
710
711 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
712 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
713 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
714 0, 0, 0, 0, /* .plt size goes here */
715 0, /* Augmentation size */
716 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
717 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
718 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
719 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
720 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
721 11, /* Block length */
722 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
723 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
724 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
725 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
726 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
727 };
728
729 /* .eh_frame covering the non-lazy .plt section. */
730
731 static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
732 {
733 #define PLT_GOT_FDE_LENGTH 16
734 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
735 0, 0, 0, 0, /* CIE ID */
736 1, /* CIE version */
737 'z', 'R', 0, /* Augmentation string */
738 1, /* Code alignment factor */
739 0x7c, /* Data alignment factor */
740 8, /* Return address column */
741 1, /* Augmentation size */
742 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
743 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
744 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
745 DW_CFA_nop, DW_CFA_nop,
746
747 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
748 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
749 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
750 0, 0, 0, 0, /* non-lazy .plt size goes here */
751 0, /* Augmentation size */
752 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
753 };
754
755 /* These are the standard parameters. */
756 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
757 {
758 elf_i386_lazy_plt0_entry, /* plt0_entry */
759 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
760 elf_i386_lazy_plt_entry, /* plt_entry */
761 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
762 2, /* plt0_got1_offset */
763 8, /* plt0_got2_offset */
764 0, /* plt0_got2_insn_end */
765 2, /* plt_got_offset */
766 7, /* plt_reloc_offset */
767 12, /* plt_plt_offset */
768 0, /* plt_got_insn_size */
769 0, /* plt_plt_insn_end */
770 6, /* plt_lazy_offset */
771 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
772 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
773 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
774 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
775 };
776
777 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
778 {
779 elf_i386_non_lazy_plt_entry, /* plt_entry */
780 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
781 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
782 2, /* plt_got_offset */
783 0, /* plt_got_insn_size */
784 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
785 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
786 };
787
788 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
789 {
790 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
791 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
792 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
793 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
794 2, /* plt0_got1_offset */
795 8, /* plt0_got2_offset */
796 0, /* plt0_got2_insn_end */
797 4+2, /* plt_got_offset */
798 4+1, /* plt_reloc_offset */
799 4+6, /* plt_plt_offset */
800 0, /* plt_got_insn_size */
801 0, /* plt_plt_insn_end */
802 0, /* plt_lazy_offset */
803 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
804 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
805 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
806 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
807 };
808
809 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
810 {
811 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
812 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
813 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
814 4+2, /* plt_got_offset */
815 0, /* plt_got_insn_size */
816 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
817 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
818 };
819 \f
820
821 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
822 for the PLTResolve stub and then for each PLT entry. */
823 #define PLTRESOLVE_RELOCS_SHLIB 0
824 #define PLTRESOLVE_RELOCS 2
825 #define PLT_NON_JUMP_SLOT_RELOCS 2
826
827 /* Architecture-specific backend data for i386. */
828
829 struct elf_i386_backend_data
830 {
831 /* Value used to fill the unused bytes of the first PLT entry. */
832 bfd_byte plt0_pad_byte;
833
834 /* Target system. */
835 enum
836 {
837 is_normal,
838 is_vxworks,
839 is_nacl
840 } os;
841 };
842
843 #define get_elf_i386_backend_data(abfd) \
844 ((const struct elf_i386_backend_data *) \
845 get_elf_backend_data (abfd)->arch_data)
846
847 /* These are the standard parameters. */
848 static const struct elf_i386_backend_data elf_i386_arch_bed =
849 {
850 0, /* plt0_pad_byte */
851 is_normal /* os */
852 };
853
854 #define elf_backend_arch_data &elf_i386_arch_bed
855
856 /* Values in tls_type of x86 ELF linker hash entry. */
857 #define GOT_TLS_IE 4
858 #define GOT_TLS_IE_POS 5
859 #define GOT_TLS_IE_NEG 6
860 #define GOT_TLS_IE_BOTH 7
861 #define GOT_TLS_GDESC 8
862 #define GOT_TLS_GD_BOTH_P(type) \
863 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
864 #define GOT_TLS_GD_P(type) \
865 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
866 #define GOT_TLS_GDESC_P(type) \
867 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
868 #define GOT_TLS_GD_ANY_P(type) \
869 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
870
871 #define is_i386_elf(bfd) \
872 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
873 && elf_tdata (bfd) != NULL \
874 && elf_object_id (bfd) == I386_ELF_DATA)
875
876 #define elf_i386_compute_jump_table_size(htab) \
877 ((htab)->elf.srelplt->reloc_count * 4)
878
879 /* Return TRUE if the TLS access code sequence support transition
880 from R_TYPE. */
881
882 static bfd_boolean
883 elf_i386_check_tls_transition (asection *sec,
884 bfd_byte *contents,
885 Elf_Internal_Shdr *symtab_hdr,
886 struct elf_link_hash_entry **sym_hashes,
887 unsigned int r_type,
888 const Elf_Internal_Rela *rel,
889 const Elf_Internal_Rela *relend)
890 {
891 unsigned int val, type, reg;
892 unsigned long r_symndx;
893 struct elf_link_hash_entry *h;
894 bfd_vma offset;
895 bfd_byte *call;
896 bfd_boolean indirect_call;
897
898 offset = rel->r_offset;
899 switch (r_type)
900 {
901 case R_386_TLS_GD:
902 case R_386_TLS_LDM:
903 if (offset < 2 || (rel + 1) >= relend)
904 return FALSE;
905
906 indirect_call = FALSE;
907 call = contents + offset + 4;
908 val = *(call - 5);
909 type = *(call - 6);
910 if (r_type == R_386_TLS_GD)
911 {
912 /* Check transition from GD access model. Only
913 leal foo@tlsgd(,%ebx,1), %eax
914 call ___tls_get_addr@PLT
915 or
916 leal foo@tlsgd(%ebx) %eax
917 call ___tls_get_addr@PLT
918 nop
919 or
920 leal foo@tlsgd(%reg), %eax
921 call *___tls_get_addr@GOT(%reg)
922 which may be converted to
923 addr32 call ___tls_get_addr
924 can transit to different access model. */
925 if ((offset + 10) > sec->size
926 || (type != 0x8d && type != 0x04))
927 return FALSE;
928
929 if (type == 0x04)
930 {
931 /* leal foo@tlsgd(,%ebx,1), %eax
932 call ___tls_get_addr@PLT */
933 if (offset < 3)
934 return FALSE;
935
936 if (*(call - 7) != 0x8d
937 || val != 0x1d
938 || call[0] != 0xe8)
939 return FALSE;
940 }
941 else
942 {
943 /* This must be
944 leal foo@tlsgd(%ebx), %eax
945 call ___tls_get_addr@PLT
946 nop
947 or
948 leal foo@tlsgd(%reg), %eax
949 call *___tls_get_addr@GOT(%reg)
950 which may be converted to
951 addr32 call ___tls_get_addr
952
953 %eax can't be used as the GOT base register since it
954 is used to pass parameter to ___tls_get_addr. */
955 reg = val & 7;
956 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
957 return FALSE;
958
959 indirect_call = call[0] == 0xff;
960 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
961 && !(call[0] == 0x67 && call[1] == 0xe8)
962 && !(indirect_call
963 && (call[1] & 0xf8) == 0x90
964 && (call[1] & 0x7) == reg))
965 return FALSE;
966 }
967 }
968 else
969 {
970 /* Check transition from LD access model. Only
971 leal foo@tlsldm(%ebx), %eax
972 call ___tls_get_addr@PLT
973 or
974 leal foo@tlsldm(%reg), %eax
975 call *___tls_get_addr@GOT(%reg)
976 which may be converted to
977 addr32 call ___tls_get_addr
978 can transit to different access model. */
979 if (type != 0x8d || (offset + 9) > sec->size)
980 return FALSE;
981
982 /* %eax can't be used as the GOT base register since it is
983 used to pass parameter to ___tls_get_addr. */
984 reg = val & 7;
985 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
986 return FALSE;
987
988 indirect_call = call[0] == 0xff;
989 if (!(reg == 3 && call[0] == 0xe8)
990 && !(call[0] == 0x67 && call[1] == 0xe8)
991 && !(indirect_call
992 && (call[1] & 0xf8) == 0x90
993 && (call[1] & 0x7) == reg))
994 return FALSE;
995 }
996
997 r_symndx = ELF32_R_SYM (rel[1].r_info);
998 if (r_symndx < symtab_hdr->sh_info)
999 return FALSE;
1000
1001 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1002 if (h == NULL
1003 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
1004 return FALSE;
1005 else if (indirect_call)
1006 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
1007 else
1008 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1009 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
1010
1011 case R_386_TLS_IE:
1012 /* Check transition from IE access model:
1013 movl foo@indntpoff(%rip), %eax
1014 movl foo@indntpoff(%rip), %reg
1015 addl foo@indntpoff(%rip), %reg
1016 */
1017
1018 if (offset < 1 || (offset + 4) > sec->size)
1019 return FALSE;
1020
1021 /* Check "movl foo@tpoff(%rip), %eax" first. */
1022 val = bfd_get_8 (abfd, contents + offset - 1);
1023 if (val == 0xa1)
1024 return TRUE;
1025
1026 if (offset < 2)
1027 return FALSE;
1028
1029 /* Check movl|addl foo@tpoff(%rip), %reg. */
1030 type = bfd_get_8 (abfd, contents + offset - 2);
1031 return ((type == 0x8b || type == 0x03)
1032 && (val & 0xc7) == 0x05);
1033
1034 case R_386_TLS_GOTIE:
1035 case R_386_TLS_IE_32:
1036 /* Check transition from {IE_32,GOTIE} access model:
1037 subl foo@{tpoff,gontoff}(%reg1), %reg2
1038 movl foo@{tpoff,gontoff}(%reg1), %reg2
1039 addl foo@{tpoff,gontoff}(%reg1), %reg2
1040 */
1041
1042 if (offset < 2 || (offset + 4) > sec->size)
1043 return FALSE;
1044
1045 val = bfd_get_8 (abfd, contents + offset - 1);
1046 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1047 return FALSE;
1048
1049 type = bfd_get_8 (abfd, contents + offset - 2);
1050 return type == 0x8b || type == 0x2b || type == 0x03;
1051
1052 case R_386_TLS_GOTDESC:
1053 /* Check transition from GDesc access model:
1054 leal x@tlsdesc(%ebx), %eax
1055
1056 Make sure it's a leal adding ebx to a 32-bit offset
1057 into any register, although it's probably almost always
1058 going to be eax. */
1059
1060 if (offset < 2 || (offset + 4) > sec->size)
1061 return FALSE;
1062
1063 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1064 return FALSE;
1065
1066 val = bfd_get_8 (abfd, contents + offset - 1);
1067 return (val & 0xc7) == 0x83;
1068
1069 case R_386_TLS_DESC_CALL:
1070 /* Check transition from GDesc access model:
1071 call *x@tlsdesc(%eax)
1072 */
1073 if (offset + 2 <= sec->size)
1074 {
1075 /* Make sure that it's a call *x@tlsdesc(%eax). */
1076 call = contents + offset;
1077 return call[0] == 0xff && call[1] == 0x10;
1078 }
1079
1080 return FALSE;
1081
1082 default:
1083 abort ();
1084 }
1085 }
1086
1087 /* Return TRUE if the TLS access transition is OK or no transition
1088 will be performed. Update R_TYPE if there is a transition. */
1089
1090 static bfd_boolean
1091 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1092 asection *sec, bfd_byte *contents,
1093 Elf_Internal_Shdr *symtab_hdr,
1094 struct elf_link_hash_entry **sym_hashes,
1095 unsigned int *r_type, int tls_type,
1096 const Elf_Internal_Rela *rel,
1097 const Elf_Internal_Rela *relend,
1098 struct elf_link_hash_entry *h,
1099 unsigned long r_symndx,
1100 bfd_boolean from_relocate_section)
1101 {
1102 unsigned int from_type = *r_type;
1103 unsigned int to_type = from_type;
1104 bfd_boolean check = TRUE;
1105
1106 /* Skip TLS transition for functions. */
1107 if (h != NULL
1108 && (h->type == STT_FUNC
1109 || h->type == STT_GNU_IFUNC))
1110 return TRUE;
1111
1112 switch (from_type)
1113 {
1114 case R_386_TLS_GD:
1115 case R_386_TLS_GOTDESC:
1116 case R_386_TLS_DESC_CALL:
1117 case R_386_TLS_IE_32:
1118 case R_386_TLS_IE:
1119 case R_386_TLS_GOTIE:
1120 if (bfd_link_executable (info))
1121 {
1122 if (h == NULL)
1123 to_type = R_386_TLS_LE_32;
1124 else if (from_type != R_386_TLS_IE
1125 && from_type != R_386_TLS_GOTIE)
1126 to_type = R_386_TLS_IE_32;
1127 }
1128
1129 /* When we are called from elf_i386_relocate_section, there may
1130 be additional transitions based on TLS_TYPE. */
1131 if (from_relocate_section)
1132 {
1133 unsigned int new_to_type = to_type;
1134
1135 if (bfd_link_executable (info)
1136 && h != NULL
1137 && h->dynindx == -1
1138 && (tls_type & GOT_TLS_IE))
1139 new_to_type = R_386_TLS_LE_32;
1140
1141 if (to_type == R_386_TLS_GD
1142 || to_type == R_386_TLS_GOTDESC
1143 || to_type == R_386_TLS_DESC_CALL)
1144 {
1145 if (tls_type == GOT_TLS_IE_POS)
1146 new_to_type = R_386_TLS_GOTIE;
1147 else if (tls_type & GOT_TLS_IE)
1148 new_to_type = R_386_TLS_IE_32;
1149 }
1150
1151 /* We checked the transition before when we were called from
1152 elf_i386_check_relocs. We only want to check the new
1153 transition which hasn't been checked before. */
1154 check = new_to_type != to_type && from_type == to_type;
1155 to_type = new_to_type;
1156 }
1157
1158 break;
1159
1160 case R_386_TLS_LDM:
1161 if (bfd_link_executable (info))
1162 to_type = R_386_TLS_LE_32;
1163 break;
1164
1165 default:
1166 return TRUE;
1167 }
1168
1169 /* Return TRUE if there is no transition. */
1170 if (from_type == to_type)
1171 return TRUE;
1172
1173 /* Check if the transition can be performed. */
1174 if (check
1175 && ! elf_i386_check_tls_transition (sec, contents,
1176 symtab_hdr, sym_hashes,
1177 from_type, rel, relend))
1178 {
1179 reloc_howto_type *from, *to;
1180 const char *name;
1181
1182 from = elf_i386_rtype_to_howto (abfd, from_type);
1183 to = elf_i386_rtype_to_howto (abfd, to_type);
1184
1185 if (h)
1186 name = h->root.root.string;
1187 else
1188 {
1189 struct elf_x86_link_hash_table *htab;
1190
1191 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1192 if (htab == NULL)
1193 name = "*unknown*";
1194 else
1195 {
1196 Elf_Internal_Sym *isym;
1197
1198 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1199 abfd, r_symndx);
1200 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1201 }
1202 }
1203
1204 _bfd_error_handler
1205 /* xgettext:c-format */
1206 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1207 "in section `%A' failed"),
1208 abfd, from->name, to->name, name,
1209 rel->r_offset, sec);
1210 bfd_set_error (bfd_error_bad_value);
1211 return FALSE;
1212 }
1213
1214 *r_type = to_type;
1215 return TRUE;
1216 }
1217
1218 /* With the local symbol, foo, we convert
1219 mov foo@GOT[(%reg1)], %reg2
1220 to
1221 lea foo[@GOTOFF(%reg1)], %reg2
1222 and convert
1223 call/jmp *foo@GOT[(%reg)]
1224 to
1225 nop call foo/jmp foo nop
1226 When PIC is false, convert
1227 test %reg1, foo@GOT[(%reg2)]
1228 to
1229 test $foo, %reg1
1230 and convert
1231 binop foo@GOT[(%reg1)], %reg2
1232 to
1233 binop $foo, %reg2
1234 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1235 instructions. */
1236
1237 static
1238 bfd_boolean
1239 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1240 bfd_byte *contents,
1241 Elf_Internal_Rela *irel,
1242 struct elf_link_hash_entry *h,
1243 bfd_boolean *converted,
1244 struct bfd_link_info *link_info)
1245 {
1246 struct elf_x86_link_hash_table *htab;
1247 unsigned int opcode;
1248 unsigned int modrm;
1249 bfd_boolean baseless;
1250 Elf_Internal_Sym *isym;
1251 unsigned int addend;
1252 unsigned int nop;
1253 bfd_vma nop_offset;
1254 bfd_boolean is_pic;
1255 bfd_boolean to_reloc_32;
1256 unsigned int r_type;
1257 unsigned int r_symndx;
1258 bfd_vma roff = irel->r_offset;
1259
1260 if (roff < 2)
1261 return TRUE;
1262
1263 /* Addend for R_386_GOT32X relocations must be 0. */
1264 addend = bfd_get_32 (abfd, contents + roff);
1265 if (addend != 0)
1266 return TRUE;
1267
1268 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
1269 is_pic = bfd_link_pic (link_info);
1270
1271 r_type = ELF32_R_TYPE (irel->r_info);
1272 r_symndx = ELF32_R_SYM (irel->r_info);
1273
1274 modrm = bfd_get_8 (abfd, contents + roff - 1);
1275 baseless = (modrm & 0xc7) == 0x5;
1276
1277 if (baseless && is_pic)
1278 {
1279 /* For PIC, disallow R_386_GOT32X without a base register
1280 since we don't know what the GOT base is. */
1281 const char *name;
1282
1283 if (h == NULL)
1284 {
1285 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1286 r_symndx);
1287 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1288 }
1289 else
1290 name = h->root.root.string;
1291
1292 _bfd_error_handler
1293 /* xgettext:c-format */
1294 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1295 " register can not be used when making a shared object"),
1296 abfd, name);
1297 return FALSE;
1298 }
1299
1300 opcode = bfd_get_8 (abfd, contents + roff - 2);
1301
1302 /* Convert to R_386_32 if PIC is false or there is no base
1303 register. */
1304 to_reloc_32 = !is_pic || baseless;
1305
1306 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1307 reloc. */
1308 if (h == NULL)
1309 {
1310 if (opcode == 0x0ff)
1311 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1312 goto convert_branch;
1313 else
1314 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1315 "test %reg1, foo@GOT(%reg2)" and
1316 "binop foo@GOT[(%reg1)], %reg2". */
1317 goto convert_load;
1318 }
1319
1320 /* Undefined weak symbol is only bound locally in executable
1321 and its reference is resolved as 0. */
1322 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, I386_ELF_DATA, TRUE,
1323 elf_x86_hash_entry (h)))
1324 {
1325 if (opcode == 0xff)
1326 {
1327 /* No direct branch to 0 for PIC. */
1328 if (is_pic)
1329 return TRUE;
1330 else
1331 goto convert_branch;
1332 }
1333 else
1334 {
1335 /* We can convert load of address 0 to R_386_32. */
1336 to_reloc_32 = TRUE;
1337 goto convert_load;
1338 }
1339 }
1340
1341 if (opcode == 0xff)
1342 {
1343 /* We have "call/jmp *foo@GOT[(%reg)]". */
1344 if ((h->root.type == bfd_link_hash_defined
1345 || h->root.type == bfd_link_hash_defweak)
1346 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1347 {
1348 /* The function is locally defined. */
1349 convert_branch:
1350 /* Convert R_386_GOT32X to R_386_PC32. */
1351 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1352 {
1353 struct elf_x86_link_hash_entry *eh
1354 = (struct elf_x86_link_hash_entry *) h;
1355
1356 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1357 is a nop prefix. */
1358 modrm = 0xe8;
1359 /* To support TLS optimization, always use addr32 prefix
1360 for "call *___tls_get_addr@GOT(%reg)". */
1361 if (eh && eh->tls_get_addr)
1362 {
1363 nop = 0x67;
1364 nop_offset = irel->r_offset - 2;
1365 }
1366 else
1367 {
1368 nop = link_info->call_nop_byte;
1369 if (link_info->call_nop_as_suffix)
1370 {
1371 nop_offset = roff + 3;
1372 irel->r_offset -= 1;
1373 }
1374 else
1375 nop_offset = roff - 2;
1376 }
1377 }
1378 else
1379 {
1380 /* Convert to "jmp foo nop". */
1381 modrm = 0xe9;
1382 nop = NOP_OPCODE;
1383 nop_offset = roff + 3;
1384 irel->r_offset -= 1;
1385 }
1386
1387 bfd_put_8 (abfd, nop, contents + nop_offset);
1388 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1389 /* When converting to PC-relative relocation, we
1390 need to adjust addend by -4. */
1391 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1392 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1393
1394 *converted = TRUE;
1395 }
1396 }
1397 else
1398 {
1399 /* We have "mov foo@GOT[(%re1g)], %reg2",
1400 "test %reg1, foo@GOT(%reg2)" and
1401 "binop foo@GOT[(%reg1)], %reg2".
1402
1403 Avoid optimizing _DYNAMIC since ld.so may use its
1404 link-time address. */
1405 if (h == htab->elf.hdynamic)
1406 return TRUE;
1407
1408 /* def_regular is set by an assignment in a linker script in
1409 bfd_elf_record_link_assignment. start_stop is set on
1410 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1411 if (h->start_stop
1412 || ((h->def_regular
1413 || h->root.type == bfd_link_hash_defined
1414 || h->root.type == bfd_link_hash_defweak)
1415 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
1416 {
1417 convert_load:
1418 if (opcode == 0x8b)
1419 {
1420 if (to_reloc_32)
1421 {
1422 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1423 "mov $foo, %reg2" with R_386_32. */
1424 r_type = R_386_32;
1425 modrm = 0xc0 | (modrm & 0x38) >> 3;
1426 bfd_put_8 (abfd, modrm, contents + roff - 1);
1427 opcode = 0xc7;
1428 }
1429 else
1430 {
1431 /* Convert "mov foo@GOT(%reg1), %reg2" to
1432 "lea foo@GOTOFF(%reg1), %reg2". */
1433 r_type = R_386_GOTOFF;
1434 opcode = 0x8d;
1435 }
1436 }
1437 else
1438 {
1439 /* Only R_386_32 is supported. */
1440 if (!to_reloc_32)
1441 return TRUE;
1442
1443 if (opcode == 0x85)
1444 {
1445 /* Convert "test %reg1, foo@GOT(%reg2)" to
1446 "test $foo, %reg1". */
1447 modrm = 0xc0 | (modrm & 0x38) >> 3;
1448 opcode = 0xf7;
1449 }
1450 else
1451 {
1452 /* Convert "binop foo@GOT(%reg1), %reg2" to
1453 "binop $foo, %reg2". */
1454 modrm = (0xc0
1455 | (modrm & 0x38) >> 3
1456 | (opcode & 0x3c));
1457 opcode = 0x81;
1458 }
1459 bfd_put_8 (abfd, modrm, contents + roff - 1);
1460 r_type = R_386_32;
1461 }
1462
1463 bfd_put_8 (abfd, opcode, contents + roff - 2);
1464 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1465
1466 *converted = TRUE;
1467 }
1468 }
1469
1470 return TRUE;
1471 }
1472
1473 /* Rename some of the generic section flags to better document how they
1474 are used here. */
1475 #define need_convert_load sec_flg0
1476 #define check_relocs_failed sec_flg1
1477
1478 /* Look through the relocs for a section during the first phase, and
1479 calculate needed space in the global offset table, procedure linkage
1480 table, and dynamic reloc sections. */
1481
1482 static bfd_boolean
1483 elf_i386_check_relocs (bfd *abfd,
1484 struct bfd_link_info *info,
1485 asection *sec,
1486 const Elf_Internal_Rela *relocs)
1487 {
1488 struct elf_x86_link_hash_table *htab;
1489 Elf_Internal_Shdr *symtab_hdr;
1490 struct elf_link_hash_entry **sym_hashes;
1491 const Elf_Internal_Rela *rel;
1492 const Elf_Internal_Rela *rel_end;
1493 asection *sreloc;
1494 bfd_byte *contents;
1495
1496 if (bfd_link_relocatable (info))
1497 return TRUE;
1498
1499 /* Don't do anything special with non-loaded, non-alloced sections.
1500 In particular, any relocs in such sections should not affect GOT
1501 and PLT reference counting (ie. we don't allow them to create GOT
1502 or PLT entries), there's no possibility or desire to optimize TLS
1503 relocs, and there's not much point in propagating relocs to shared
1504 libs that the dynamic linker won't relocate. */
1505 if ((sec->flags & SEC_ALLOC) == 0)
1506 return TRUE;
1507
1508 BFD_ASSERT (is_i386_elf (abfd));
1509
1510 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1511 if (htab == NULL)
1512 {
1513 sec->check_relocs_failed = 1;
1514 return FALSE;
1515 }
1516
1517 /* Get the section contents. */
1518 if (elf_section_data (sec)->this_hdr.contents != NULL)
1519 contents = elf_section_data (sec)->this_hdr.contents;
1520 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1521 {
1522 sec->check_relocs_failed = 1;
1523 return FALSE;
1524 }
1525
1526 symtab_hdr = &elf_symtab_hdr (abfd);
1527 sym_hashes = elf_sym_hashes (abfd);
1528
1529 sreloc = NULL;
1530
1531 rel_end = relocs + sec->reloc_count;
1532 for (rel = relocs; rel < rel_end; rel++)
1533 {
1534 unsigned int r_type;
1535 unsigned int r_symndx;
1536 struct elf_link_hash_entry *h;
1537 struct elf_x86_link_hash_entry *eh;
1538 Elf_Internal_Sym *isym;
1539 const char *name;
1540 bfd_boolean size_reloc;
1541
1542 r_symndx = ELF32_R_SYM (rel->r_info);
1543 r_type = ELF32_R_TYPE (rel->r_info);
1544
1545 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1546 {
1547 /* xgettext:c-format */
1548 _bfd_error_handler (_("%B: bad symbol index: %d"),
1549 abfd, r_symndx);
1550 goto error_return;
1551 }
1552
1553 if (r_symndx < symtab_hdr->sh_info)
1554 {
1555 /* A local symbol. */
1556 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1557 abfd, r_symndx);
1558 if (isym == NULL)
1559 goto error_return;
1560
1561 /* Check relocation against local STT_GNU_IFUNC symbol. */
1562 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1563 {
1564 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
1565 if (h == NULL)
1566 goto error_return;
1567
1568 /* Fake a STT_GNU_IFUNC symbol. */
1569 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1570 isym, NULL);
1571 h->type = STT_GNU_IFUNC;
1572 h->def_regular = 1;
1573 h->ref_regular = 1;
1574 h->forced_local = 1;
1575 h->root.type = bfd_link_hash_defined;
1576 }
1577 else
1578 h = NULL;
1579 }
1580 else
1581 {
1582 isym = NULL;
1583 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1584 while (h->root.type == bfd_link_hash_indirect
1585 || h->root.type == bfd_link_hash_warning)
1586 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1587 }
1588
1589 eh = (struct elf_x86_link_hash_entry *) h;
1590 if (h != NULL)
1591 {
1592 if (r_type == R_386_GOTOFF)
1593 eh->gotoff_ref = 1;
1594
1595 /* It is referenced by a non-shared object. */
1596 h->ref_regular = 1;
1597 h->root.non_ir_ref_regular = 1;
1598
1599 if (h->type == STT_GNU_IFUNC)
1600 elf_tdata (info->output_bfd)->has_gnu_symbols
1601 |= elf_gnu_symbol_ifunc;
1602 }
1603
1604 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1605 symtab_hdr, sym_hashes,
1606 &r_type, GOT_UNKNOWN,
1607 rel, rel_end, h, r_symndx, FALSE))
1608 goto error_return;
1609
1610 switch (r_type)
1611 {
1612 case R_386_TLS_LDM:
1613 htab->tls_ld_or_ldm_got.refcount += 1;
1614 goto create_got;
1615
1616 case R_386_PLT32:
1617 /* This symbol requires a procedure linkage table entry. We
1618 actually build the entry in adjust_dynamic_symbol,
1619 because this might be a case of linking PIC code which is
1620 never referenced by a dynamic object, in which case we
1621 don't need to generate a procedure linkage table entry
1622 after all. */
1623
1624 /* If this is a local symbol, we resolve it directly without
1625 creating a procedure linkage table entry. */
1626 if (h == NULL)
1627 continue;
1628
1629 eh->has_got_reloc = 1;
1630 h->needs_plt = 1;
1631 h->plt.refcount += 1;
1632 break;
1633
1634 case R_386_SIZE32:
1635 size_reloc = TRUE;
1636 goto do_size;
1637
1638 case R_386_TLS_IE_32:
1639 case R_386_TLS_IE:
1640 case R_386_TLS_GOTIE:
1641 if (!bfd_link_executable (info))
1642 info->flags |= DF_STATIC_TLS;
1643 /* Fall through */
1644
1645 case R_386_GOT32:
1646 case R_386_GOT32X:
1647 case R_386_TLS_GD:
1648 case R_386_TLS_GOTDESC:
1649 case R_386_TLS_DESC_CALL:
1650 /* This symbol requires a global offset table entry. */
1651 {
1652 int tls_type, old_tls_type;
1653
1654 switch (r_type)
1655 {
1656 default:
1657 case R_386_GOT32:
1658 case R_386_GOT32X:
1659 tls_type = GOT_NORMAL;
1660 break;
1661 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1662 case R_386_TLS_GOTDESC:
1663 case R_386_TLS_DESC_CALL:
1664 tls_type = GOT_TLS_GDESC; break;
1665 case R_386_TLS_IE_32:
1666 if (ELF32_R_TYPE (rel->r_info) == r_type)
1667 tls_type = GOT_TLS_IE_NEG;
1668 else
1669 /* If this is a GD->IE transition, we may use either of
1670 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1671 tls_type = GOT_TLS_IE;
1672 break;
1673 case R_386_TLS_IE:
1674 case R_386_TLS_GOTIE:
1675 tls_type = GOT_TLS_IE_POS; break;
1676 }
1677
1678 if (h != NULL)
1679 {
1680 h->got.refcount += 1;
1681 old_tls_type = elf_x86_hash_entry (h)->tls_type;
1682 }
1683 else
1684 {
1685 bfd_signed_vma *local_got_refcounts;
1686
1687 /* This is a global offset table entry for a local symbol. */
1688 local_got_refcounts = elf_local_got_refcounts (abfd);
1689 if (local_got_refcounts == NULL)
1690 {
1691 bfd_size_type size;
1692
1693 size = symtab_hdr->sh_info;
1694 size *= (sizeof (bfd_signed_vma)
1695 + sizeof (bfd_vma) + sizeof(char));
1696 local_got_refcounts = (bfd_signed_vma *)
1697 bfd_zalloc (abfd, size);
1698 if (local_got_refcounts == NULL)
1699 goto error_return;
1700 elf_local_got_refcounts (abfd) = local_got_refcounts;
1701 elf_x86_local_tlsdesc_gotent (abfd)
1702 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1703 elf_x86_local_got_tls_type (abfd)
1704 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1705 }
1706 local_got_refcounts[r_symndx] += 1;
1707 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
1708 }
1709
1710 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1711 tls_type |= old_tls_type;
1712 /* If a TLS symbol is accessed using IE at least once,
1713 there is no point to use dynamic model for it. */
1714 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1715 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1716 || (tls_type & GOT_TLS_IE) == 0))
1717 {
1718 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1719 tls_type = old_tls_type;
1720 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1721 && GOT_TLS_GD_ANY_P (tls_type))
1722 tls_type |= old_tls_type;
1723 else
1724 {
1725 if (h)
1726 name = h->root.root.string;
1727 else
1728 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1729 NULL);
1730 _bfd_error_handler
1731 /* xgettext:c-format */
1732 (_("%B: `%s' accessed both as normal and "
1733 "thread local symbol"),
1734 abfd, name);
1735 bfd_set_error (bfd_error_bad_value);
1736 goto error_return;
1737 }
1738 }
1739
1740 if (old_tls_type != tls_type)
1741 {
1742 if (h != NULL)
1743 elf_x86_hash_entry (h)->tls_type = tls_type;
1744 else
1745 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
1746 }
1747 }
1748 /* Fall through */
1749
1750 case R_386_GOTOFF:
1751 case R_386_GOTPC:
1752 create_got:
1753 if (r_type != R_386_TLS_IE)
1754 {
1755 if (eh != NULL)
1756 eh->has_got_reloc = 1;
1757 break;
1758 }
1759 /* Fall through */
1760
1761 case R_386_TLS_LE_32:
1762 case R_386_TLS_LE:
1763 if (eh != NULL)
1764 eh->has_got_reloc = 1;
1765 if (bfd_link_executable (info))
1766 break;
1767 info->flags |= DF_STATIC_TLS;
1768 goto do_relocation;
1769
1770 case R_386_32:
1771 case R_386_PC32:
1772 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1773 eh->has_non_got_reloc = 1;
1774 do_relocation:
1775 /* We are called after all symbols have been resolved. Only
1776 relocation against STT_GNU_IFUNC symbol must go through
1777 PLT. */
1778 if (h != NULL
1779 && (bfd_link_executable (info)
1780 || h->type == STT_GNU_IFUNC))
1781 {
1782 /* If this reloc is in a read-only section, we might
1783 need a copy reloc. We can't check reliably at this
1784 stage whether the section is read-only, as input
1785 sections have not yet been mapped to output sections.
1786 Tentatively set the flag for now, and correct in
1787 adjust_dynamic_symbol. */
1788 h->non_got_ref = 1;
1789
1790 /* We may need a .plt entry if the symbol is a function
1791 defined in a shared lib or is a STT_GNU_IFUNC function
1792 referenced from the code or read-only section. */
1793 if (!h->def_regular
1794 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1795 h->plt.refcount += 1;
1796
1797 if (r_type == R_386_PC32)
1798 {
1799 /* Since something like ".long foo - ." may be used
1800 as pointer, make sure that PLT is used if foo is
1801 a function defined in a shared library. */
1802 if ((sec->flags & SEC_CODE) == 0)
1803 h->pointer_equality_needed = 1;
1804 else if (h->type == STT_GNU_IFUNC
1805 && bfd_link_pic (info))
1806 {
1807 _bfd_error_handler
1808 /* xgettext:c-format */
1809 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
1810 abfd, h->root.root.string);
1811 bfd_set_error (bfd_error_bad_value);
1812 goto error_return;
1813 }
1814 }
1815 else
1816 {
1817 h->pointer_equality_needed = 1;
1818 /* R_386_32 can be resolved at run-time. */
1819 if (r_type == R_386_32
1820 && (sec->flags & SEC_READONLY) == 0)
1821 eh->func_pointer_refcount += 1;
1822 }
1823 }
1824
1825 size_reloc = FALSE;
1826 do_size:
1827 /* If we are creating a shared library, and this is a reloc
1828 against a global symbol, or a non PC relative reloc
1829 against a local symbol, then we need to copy the reloc
1830 into the shared library. However, if we are linking with
1831 -Bsymbolic, we do not need to copy a reloc against a
1832 global symbol which is defined in an object we are
1833 including in the link (i.e., DEF_REGULAR is set). At
1834 this point we have not seen all the input files, so it is
1835 possible that DEF_REGULAR is not set now but will be set
1836 later (it is never cleared). In case of a weak definition,
1837 DEF_REGULAR may be cleared later by a strong definition in
1838 a shared library. We account for that possibility below by
1839 storing information in the relocs_copied field of the hash
1840 table entry. A similar situation occurs when creating
1841 shared libraries and symbol visibility changes render the
1842 symbol local.
1843
1844 If on the other hand, we are creating an executable, we
1845 may need to keep relocations for symbols satisfied by a
1846 dynamic library if we manage to avoid copy relocs for the
1847 symbol.
1848
1849 Generate dynamic pointer relocation against STT_GNU_IFUNC
1850 symbol in the non-code section. */
1851 if ((bfd_link_pic (info)
1852 && (r_type != R_386_PC32
1853 || (h != NULL
1854 && (! (bfd_link_pie (info)
1855 || SYMBOLIC_BIND (info, h))
1856 || h->root.type == bfd_link_hash_defweak
1857 || !h->def_regular))))
1858 || (h != NULL
1859 && h->type == STT_GNU_IFUNC
1860 && r_type == R_386_32
1861 && (sec->flags & SEC_CODE) == 0)
1862 || (ELIMINATE_COPY_RELOCS
1863 && !bfd_link_pic (info)
1864 && h != NULL
1865 && (h->root.type == bfd_link_hash_defweak
1866 || !h->def_regular)))
1867 {
1868 struct elf_dyn_relocs *p;
1869 struct elf_dyn_relocs **head;
1870
1871 /* We must copy these reloc types into the output file.
1872 Create a reloc section in dynobj and make room for
1873 this reloc. */
1874 if (sreloc == NULL)
1875 {
1876 sreloc = _bfd_elf_make_dynamic_reloc_section
1877 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1878
1879 if (sreloc == NULL)
1880 goto error_return;
1881 }
1882
1883 /* If this is a global symbol, we count the number of
1884 relocations we need for this symbol. */
1885 if (h != NULL)
1886 {
1887 head = &eh->dyn_relocs;
1888 }
1889 else
1890 {
1891 /* Track dynamic relocs needed for local syms too.
1892 We really need local syms available to do this
1893 easily. Oh well. */
1894 void **vpp;
1895 asection *s;
1896
1897 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1898 abfd, r_symndx);
1899 if (isym == NULL)
1900 goto error_return;
1901
1902 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1903 if (s == NULL)
1904 s = sec;
1905
1906 vpp = &elf_section_data (s)->local_dynrel;
1907 head = (struct elf_dyn_relocs **)vpp;
1908 }
1909
1910 p = *head;
1911 if (p == NULL || p->sec != sec)
1912 {
1913 bfd_size_type amt = sizeof *p;
1914 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1915 amt);
1916 if (p == NULL)
1917 goto error_return;
1918 p->next = *head;
1919 *head = p;
1920 p->sec = sec;
1921 p->count = 0;
1922 p->pc_count = 0;
1923 }
1924
1925 p->count += 1;
1926 /* Count size relocation as PC-relative relocation. */
1927 if (r_type == R_386_PC32 || size_reloc)
1928 p->pc_count += 1;
1929 }
1930 break;
1931
1932 /* This relocation describes the C++ object vtable hierarchy.
1933 Reconstruct it for later use during GC. */
1934 case R_386_GNU_VTINHERIT:
1935 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1936 goto error_return;
1937 break;
1938
1939 /* This relocation describes which C++ vtable entries are actually
1940 used. Record for later use during GC. */
1941 case R_386_GNU_VTENTRY:
1942 BFD_ASSERT (h != NULL);
1943 if (h != NULL
1944 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1945 goto error_return;
1946 break;
1947
1948 default:
1949 break;
1950 }
1951
1952 if (r_type == R_386_GOT32X
1953 && (h == NULL || h->type != STT_GNU_IFUNC))
1954 sec->need_convert_load = 1;
1955 }
1956
1957 if (elf_section_data (sec)->this_hdr.contents != contents)
1958 {
1959 if (!info->keep_memory)
1960 free (contents);
1961 else
1962 {
1963 /* Cache the section contents for elf_link_input_bfd. */
1964 elf_section_data (sec)->this_hdr.contents = contents;
1965 }
1966 }
1967
1968 return TRUE;
1969
1970 error_return:
1971 if (elf_section_data (sec)->this_hdr.contents != contents)
1972 free (contents);
1973 sec->check_relocs_failed = 1;
1974 return FALSE;
1975 }
1976
1977 /* Allocate space in .plt, .got and associated reloc sections for
1978 dynamic relocs. */
1979
1980 static bfd_boolean
1981 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1982 {
1983 struct bfd_link_info *info;
1984 struct elf_x86_link_hash_table *htab;
1985 struct elf_x86_link_hash_entry *eh;
1986 struct elf_dyn_relocs *p;
1987 unsigned plt_entry_size;
1988 bfd_boolean resolved_to_zero;
1989 const struct elf_i386_backend_data *bed;
1990
1991 if (h->root.type == bfd_link_hash_indirect)
1992 return TRUE;
1993
1994 eh = (struct elf_x86_link_hash_entry *) h;
1995
1996 info = (struct bfd_link_info *) inf;
1997 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1998 if (htab == NULL)
1999 return FALSE;
2000
2001 bed = get_elf_i386_backend_data (info->output_bfd);
2002
2003 plt_entry_size = htab->plt.plt_entry_size;
2004
2005 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2006 I386_ELF_DATA,
2007 eh->has_got_reloc,
2008 eh);
2009
2010 /* Clear the reference count of function pointer relocations if
2011 symbol isn't a normal function. */
2012 if (h->type != STT_FUNC)
2013 eh->func_pointer_refcount = 0;
2014
2015 /* We can't use the GOT PLT if pointer equality is needed since
2016 finish_dynamic_symbol won't clear symbol value and the dynamic
2017 linker won't update the GOT slot. We will get into an infinite
2018 loop at run-time. */
2019 if (htab->plt_got != NULL
2020 && h->type != STT_GNU_IFUNC
2021 && !h->pointer_equality_needed
2022 && h->plt.refcount > 0
2023 && h->got.refcount > 0)
2024 {
2025 /* Don't use the regular PLT if there are both GOT and GOTPLT
2026 reloctions. */
2027 h->plt.offset = (bfd_vma) -1;
2028
2029 /* Use the GOT PLT. */
2030 eh->plt_got.refcount = 1;
2031 }
2032
2033 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2034 here if it is defined and referenced in a non-shared object. */
2035 if (h->type == STT_GNU_IFUNC
2036 && h->def_regular)
2037 {
2038 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2039 &htab->readonly_dynrelocs_against_ifunc,
2040 plt_entry_size,
2041 (htab->plt.has_plt0
2042 * plt_entry_size),
2043 4, TRUE))
2044 {
2045 asection *s = htab->plt_second;
2046 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2047 {
2048 /* Use the second PLT section if it is created. */
2049 eh->plt_second.offset = s->size;
2050
2051 /* Make room for this entry in the second PLT section. */
2052 s->size += htab->non_lazy_plt->plt_entry_size;
2053 }
2054
2055 return TRUE;
2056 }
2057 else
2058 return FALSE;
2059 }
2060 /* Don't create the PLT entry if there are only function pointer
2061 relocations which can be resolved at run-time. */
2062 else if (htab->elf.dynamic_sections_created
2063 && (h->plt.refcount > eh->func_pointer_refcount
2064 || eh->plt_got.refcount > 0))
2065 {
2066 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2067
2068 /* Clear the reference count of function pointer relocations
2069 if PLT is used. */
2070 eh->func_pointer_refcount = 0;
2071
2072 /* Make sure this symbol is output as a dynamic symbol.
2073 Undefined weak syms won't yet be marked as dynamic. */
2074 if (h->dynindx == -1
2075 && !h->forced_local
2076 && !resolved_to_zero
2077 && h->root.type == bfd_link_hash_undefweak)
2078 {
2079 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2080 return FALSE;
2081 }
2082
2083 if (bfd_link_pic (info)
2084 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2085 {
2086 asection *s = htab->elf.splt;
2087 asection *second_s = htab->plt_second;
2088 asection *got_s = htab->plt_got;
2089
2090 /* If this is the first .plt entry, make room for the special
2091 first entry. The .plt section is used by prelink to undo
2092 prelinking for dynamic relocations. */
2093 if (s->size == 0)
2094 s->size = htab->plt.has_plt0 * plt_entry_size;
2095
2096 if (use_plt_got)
2097 eh->plt_got.offset = got_s->size;
2098 else
2099 {
2100 h->plt.offset = s->size;
2101 if (second_s)
2102 eh->plt_second.offset = second_s->size;
2103 }
2104
2105 /* If this symbol is not defined in a regular file, and we are
2106 not generating a shared library, then set the symbol to this
2107 location in the .plt. This is required to make function
2108 pointers compare as equal between the normal executable and
2109 the shared library. */
2110 if (! bfd_link_pic (info)
2111 && !h->def_regular)
2112 {
2113 if (use_plt_got)
2114 {
2115 /* We need to make a call to the entry of the GOT PLT
2116 instead of regular PLT entry. */
2117 h->root.u.def.section = got_s;
2118 h->root.u.def.value = eh->plt_got.offset;
2119 }
2120 else
2121 {
2122 if (second_s)
2123 {
2124 /* We need to make a call to the entry of the
2125 second PLT instead of regular PLT entry. */
2126 h->root.u.def.section = second_s;
2127 h->root.u.def.value = eh->plt_second.offset;
2128 }
2129 else
2130 {
2131 h->root.u.def.section = s;
2132 h->root.u.def.value = h->plt.offset;
2133 }
2134 }
2135 }
2136
2137 /* Make room for this entry. */
2138 if (use_plt_got)
2139 got_s->size += htab->non_lazy_plt->plt_entry_size;
2140 else
2141 {
2142 s->size += plt_entry_size;
2143 if (second_s)
2144 second_s->size += htab->non_lazy_plt->plt_entry_size;
2145
2146 /* We also need to make an entry in the .got.plt section,
2147 which will be placed in the .got section by the linker
2148 script. */
2149 htab->elf.sgotplt->size += 4;
2150
2151 /* There should be no PLT relocation against resolved
2152 undefined weak symbol in executable. */
2153 if (!resolved_to_zero)
2154 {
2155 /* We also need to make an entry in the .rel.plt
2156 section. */
2157 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2158 htab->elf.srelplt->reloc_count++;
2159 }
2160 }
2161
2162 if (bed->os == is_vxworks && !bfd_link_pic (info))
2163 {
2164 /* VxWorks has a second set of relocations for each PLT entry
2165 in executables. They go in a separate relocation section,
2166 which is processed by the kernel loader. */
2167
2168 /* There are two relocations for the initial PLT entry: an
2169 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2170 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2171
2172 asection *srelplt2 = htab->srelplt2;
2173 if (h->plt.offset == plt_entry_size)
2174 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2175
2176 /* There are two extra relocations for each subsequent PLT entry:
2177 an R_386_32 relocation for the GOT entry, and an R_386_32
2178 relocation for the PLT entry. */
2179
2180 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2181 }
2182 }
2183 else
2184 {
2185 eh->plt_got.offset = (bfd_vma) -1;
2186 h->plt.offset = (bfd_vma) -1;
2187 h->needs_plt = 0;
2188 }
2189 }
2190 else
2191 {
2192 eh->plt_got.offset = (bfd_vma) -1;
2193 h->plt.offset = (bfd_vma) -1;
2194 h->needs_plt = 0;
2195 }
2196
2197 eh->tlsdesc_got = (bfd_vma) -1;
2198
2199 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2200 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2201 if (h->got.refcount > 0
2202 && bfd_link_executable (info)
2203 && h->dynindx == -1
2204 && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE))
2205 h->got.offset = (bfd_vma) -1;
2206 else if (h->got.refcount > 0)
2207 {
2208 asection *s;
2209 bfd_boolean dyn;
2210 int tls_type = elf_x86_hash_entry (h)->tls_type;
2211
2212 /* Make sure this symbol is output as a dynamic symbol.
2213 Undefined weak syms won't yet be marked as dynamic. */
2214 if (h->dynindx == -1
2215 && !h->forced_local
2216 && !resolved_to_zero
2217 && h->root.type == bfd_link_hash_undefweak)
2218 {
2219 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2220 return FALSE;
2221 }
2222
2223 s = htab->elf.sgot;
2224 if (GOT_TLS_GDESC_P (tls_type))
2225 {
2226 eh->tlsdesc_got = htab->elf.sgotplt->size
2227 - elf_i386_compute_jump_table_size (htab);
2228 htab->elf.sgotplt->size += 8;
2229 h->got.offset = (bfd_vma) -2;
2230 }
2231 if (! GOT_TLS_GDESC_P (tls_type)
2232 || GOT_TLS_GD_P (tls_type))
2233 {
2234 h->got.offset = s->size;
2235 s->size += 4;
2236 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2237 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2238 s->size += 4;
2239 }
2240 dyn = htab->elf.dynamic_sections_created;
2241 /* R_386_TLS_IE_32 needs one dynamic relocation,
2242 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2243 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2244 need two), R_386_TLS_GD needs one if local symbol and two if
2245 global. No dynamic relocation against resolved undefined weak
2246 symbol in executable. */
2247 if (tls_type == GOT_TLS_IE_BOTH)
2248 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2249 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2250 || (tls_type & GOT_TLS_IE))
2251 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2252 else if (GOT_TLS_GD_P (tls_type))
2253 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2254 else if (! GOT_TLS_GDESC_P (tls_type)
2255 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2256 && !resolved_to_zero)
2257 || h->root.type != bfd_link_hash_undefweak)
2258 && (bfd_link_pic (info)
2259 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2260 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2261 if (GOT_TLS_GDESC_P (tls_type))
2262 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2263 }
2264 else
2265 h->got.offset = (bfd_vma) -1;
2266
2267 if (eh->dyn_relocs == NULL)
2268 return TRUE;
2269
2270 /* In the shared -Bsymbolic case, discard space allocated for
2271 dynamic pc-relative relocs against symbols which turn out to be
2272 defined in regular objects. For the normal shared case, discard
2273 space for pc-relative relocs that have become local due to symbol
2274 visibility changes. */
2275
2276 if (bfd_link_pic (info))
2277 {
2278 /* The only reloc that uses pc_count is R_386_PC32, which will
2279 appear on a call or on something like ".long foo - .". We
2280 want calls to protected symbols to resolve directly to the
2281 function rather than going via the plt. If people want
2282 function pointer comparisons to work as expected then they
2283 should avoid writing assembly like ".long foo - .". */
2284 if (SYMBOL_CALLS_LOCAL (info, h))
2285 {
2286 struct elf_dyn_relocs **pp;
2287
2288 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2289 {
2290 p->count -= p->pc_count;
2291 p->pc_count = 0;
2292 if (p->count == 0)
2293 *pp = p->next;
2294 else
2295 pp = &p->next;
2296 }
2297 }
2298
2299 if (bed->os == is_vxworks)
2300 {
2301 struct elf_dyn_relocs **pp;
2302 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2303 {
2304 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2305 *pp = p->next;
2306 else
2307 pp = &p->next;
2308 }
2309 }
2310
2311 /* Also discard relocs on undefined weak syms with non-default
2312 visibility or in PIE. */
2313 if (eh->dyn_relocs != NULL
2314 && h->root.type == bfd_link_hash_undefweak)
2315 {
2316 /* Undefined weak symbol is never bound locally in shared
2317 library. */
2318 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2319 || resolved_to_zero)
2320 {
2321 if (h->non_got_ref)
2322 {
2323 /* Keep dynamic non-GOT/non-PLT relocation so that we
2324 can branch to 0 without PLT. */
2325 struct elf_dyn_relocs **pp;
2326
2327 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2328 if (p->pc_count == 0)
2329 *pp = p->next;
2330 else
2331 {
2332 /* Remove non-R_386_PC32 relocation. */
2333 p->count = p->pc_count;
2334 pp = &p->next;
2335 }
2336
2337 if (eh->dyn_relocs != NULL)
2338 {
2339 /* Make sure undefined weak symbols are output
2340 as dynamic symbols in PIEs for dynamic non-GOT
2341 non-PLT reloations. */
2342 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2343 return FALSE;
2344 }
2345 }
2346 else
2347 eh->dyn_relocs = NULL;
2348 }
2349 else if (h->dynindx == -1
2350 && !h->forced_local)
2351 {
2352 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2353 return FALSE;
2354 }
2355 }
2356 }
2357 else if (ELIMINATE_COPY_RELOCS)
2358 {
2359 /* For the non-shared case, discard space for relocs against
2360 symbols which turn out to need copy relocs or are not
2361 dynamic. Keep dynamic relocations for run-time function
2362 pointer initialization. */
2363
2364 if ((!h->non_got_ref
2365 || eh->func_pointer_refcount > 0
2366 || (h->root.type == bfd_link_hash_undefweak
2367 && !resolved_to_zero))
2368 && ((h->def_dynamic
2369 && !h->def_regular)
2370 || (htab->elf.dynamic_sections_created
2371 && (h->root.type == bfd_link_hash_undefweak
2372 || h->root.type == bfd_link_hash_undefined))))
2373 {
2374 /* Make sure this symbol is output as a dynamic symbol.
2375 Undefined weak syms won't yet be marked as dynamic. */
2376 if (h->dynindx == -1
2377 && !h->forced_local
2378 && !resolved_to_zero
2379 && h->root.type == bfd_link_hash_undefweak)
2380 {
2381 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2382 return FALSE;
2383 }
2384
2385 /* If that succeeded, we know we'll be keeping all the
2386 relocs. */
2387 if (h->dynindx != -1)
2388 goto keep;
2389 }
2390
2391 eh->dyn_relocs = NULL;
2392 eh->func_pointer_refcount = 0;
2393
2394 keep: ;
2395 }
2396
2397 /* Finally, allocate space. */
2398 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2399 {
2400 asection *sreloc;
2401
2402 sreloc = elf_section_data (p->sec)->sreloc;
2403
2404 BFD_ASSERT (sreloc != NULL);
2405 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2406 }
2407
2408 return TRUE;
2409 }
2410
2411 /* Allocate space in .plt, .got and associated reloc sections for
2412 local dynamic relocs. */
2413
2414 static bfd_boolean
2415 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2416 {
2417 struct elf_link_hash_entry *h
2418 = (struct elf_link_hash_entry *) *slot;
2419
2420 if (h->type != STT_GNU_IFUNC
2421 || !h->def_regular
2422 || !h->ref_regular
2423 || !h->forced_local
2424 || h->root.type != bfd_link_hash_defined)
2425 abort ();
2426
2427 return elf_i386_allocate_dynrelocs (h, inf);
2428 }
2429
2430 /* Convert load via the GOT slot to load immediate. */
2431
2432 static bfd_boolean
2433 elf_i386_convert_load (bfd *abfd, asection *sec,
2434 struct bfd_link_info *link_info)
2435 {
2436 struct elf_x86_link_hash_table *htab;
2437 Elf_Internal_Shdr *symtab_hdr;
2438 Elf_Internal_Rela *internal_relocs;
2439 Elf_Internal_Rela *irel, *irelend;
2440 bfd_byte *contents;
2441 bfd_boolean changed;
2442 bfd_signed_vma *local_got_refcounts;
2443
2444 /* Don't even try to convert non-ELF outputs. */
2445 if (!is_elf_hash_table (link_info->hash))
2446 return FALSE;
2447
2448 /* Nothing to do if there is no need or no output. */
2449 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2450 || sec->need_convert_load == 0
2451 || bfd_is_abs_section (sec->output_section))
2452 return TRUE;
2453
2454 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2455
2456 /* Load the relocations for this section. */
2457 internal_relocs = (_bfd_elf_link_read_relocs
2458 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2459 link_info->keep_memory));
2460 if (internal_relocs == NULL)
2461 return FALSE;
2462
2463 changed = FALSE;
2464 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
2465 local_got_refcounts = elf_local_got_refcounts (abfd);
2466
2467 /* Get the section contents. */
2468 if (elf_section_data (sec)->this_hdr.contents != NULL)
2469 contents = elf_section_data (sec)->this_hdr.contents;
2470 else
2471 {
2472 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2473 goto error_return;
2474 }
2475
2476 irelend = internal_relocs + sec->reloc_count;
2477 for (irel = internal_relocs; irel < irelend; irel++)
2478 {
2479 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2480 unsigned int r_symndx;
2481 struct elf_link_hash_entry *h;
2482 bfd_boolean converted;
2483
2484 /* Don't convert R_386_GOT32 since we can't tell if it is applied
2485 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
2486 if (r_type != R_386_GOT32X)
2487 continue;
2488
2489 r_symndx = ELF32_R_SYM (irel->r_info);
2490 if (r_symndx < symtab_hdr->sh_info)
2491 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2492 (const Elf_Internal_Rela *) irel,
2493 FALSE);
2494 else
2495 {
2496 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2497 while (h->root.type == bfd_link_hash_indirect
2498 || h->root.type == bfd_link_hash_warning)
2499 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2500 }
2501
2502 /* STT_GNU_IFUNC must keep GOT32 relocations. */
2503 if (h != NULL && h->type == STT_GNU_IFUNC)
2504 continue;
2505
2506 converted = FALSE;
2507 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
2508 irel, h, &converted, link_info))
2509 goto error_return;
2510
2511 if (converted)
2512 {
2513 changed = converted;
2514 if (h)
2515 {
2516 if (h->got.refcount > 0)
2517 h->got.refcount -= 1;
2518 }
2519 else
2520 {
2521 if (local_got_refcounts != NULL
2522 && local_got_refcounts[r_symndx] > 0)
2523 local_got_refcounts[r_symndx] -= 1;
2524 }
2525 }
2526 }
2527
2528 if (contents != NULL
2529 && elf_section_data (sec)->this_hdr.contents != contents)
2530 {
2531 if (!changed && !link_info->keep_memory)
2532 free (contents);
2533 else
2534 {
2535 /* Cache the section contents for elf_link_input_bfd. */
2536 elf_section_data (sec)->this_hdr.contents = contents;
2537 }
2538 }
2539
2540 if (elf_section_data (sec)->relocs != internal_relocs)
2541 {
2542 if (!changed)
2543 free (internal_relocs);
2544 else
2545 elf_section_data (sec)->relocs = internal_relocs;
2546 }
2547
2548 return TRUE;
2549
2550 error_return:
2551 if (contents != NULL
2552 && elf_section_data (sec)->this_hdr.contents != contents)
2553 free (contents);
2554 if (internal_relocs != NULL
2555 && elf_section_data (sec)->relocs != internal_relocs)
2556 free (internal_relocs);
2557 return FALSE;
2558 }
2559
2560 /* Set the sizes of the dynamic sections. */
2561
2562 static bfd_boolean
2563 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2564 {
2565 struct elf_x86_link_hash_table *htab;
2566 bfd *dynobj;
2567 asection *s;
2568 bfd_boolean relocs;
2569 bfd *ibfd;
2570
2571 htab = elf_x86_hash_table (info, I386_ELF_DATA);
2572 if (htab == NULL)
2573 return FALSE;
2574 dynobj = htab->elf.dynobj;
2575 if (dynobj == NULL)
2576 abort ();
2577
2578 /* Set up .got offsets for local syms, and space for local dynamic
2579 relocs. */
2580 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2581 {
2582 bfd_signed_vma *local_got;
2583 bfd_signed_vma *end_local_got;
2584 char *local_tls_type;
2585 bfd_vma *local_tlsdesc_gotent;
2586 bfd_size_type locsymcount;
2587 Elf_Internal_Shdr *symtab_hdr;
2588 asection *srel;
2589
2590 if (! is_i386_elf (ibfd))
2591 continue;
2592
2593 for (s = ibfd->sections; s != NULL; s = s->next)
2594 {
2595 struct elf_dyn_relocs *p;
2596
2597 if (!elf_i386_convert_load (ibfd, s, info))
2598 return FALSE;
2599
2600 for (p = ((struct elf_dyn_relocs *)
2601 elf_section_data (s)->local_dynrel);
2602 p != NULL;
2603 p = p->next)
2604 {
2605 if (!bfd_is_abs_section (p->sec)
2606 && bfd_is_abs_section (p->sec->output_section))
2607 {
2608 /* Input section has been discarded, either because
2609 it is a copy of a linkonce section or due to
2610 linker script /DISCARD/, so we'll be discarding
2611 the relocs too. */
2612 }
2613 else if ((get_elf_i386_backend_data (output_bfd)->os
2614 == is_vxworks)
2615 && strcmp (p->sec->output_section->name,
2616 ".tls_vars") == 0)
2617 {
2618 /* Relocations in vxworks .tls_vars sections are
2619 handled specially by the loader. */
2620 }
2621 else if (p->count != 0)
2622 {
2623 srel = elf_section_data (p->sec)->sreloc;
2624 srel->size += p->count * sizeof (Elf32_External_Rel);
2625 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2626 && (info->flags & DF_TEXTREL) == 0)
2627 {
2628 info->flags |= DF_TEXTREL;
2629 if ((info->warn_shared_textrel && bfd_link_pic (info))
2630 || info->error_textrel)
2631 /* xgettext:c-format */
2632 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2633 p->sec->owner, p->sec);
2634 }
2635 }
2636 }
2637 }
2638
2639 local_got = elf_local_got_refcounts (ibfd);
2640 if (!local_got)
2641 continue;
2642
2643 symtab_hdr = &elf_symtab_hdr (ibfd);
2644 locsymcount = symtab_hdr->sh_info;
2645 end_local_got = local_got + locsymcount;
2646 local_tls_type = elf_x86_local_got_tls_type (ibfd);
2647 local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
2648 s = htab->elf.sgot;
2649 srel = htab->elf.srelgot;
2650 for (; local_got < end_local_got;
2651 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2652 {
2653 *local_tlsdesc_gotent = (bfd_vma) -1;
2654 if (*local_got > 0)
2655 {
2656 if (GOT_TLS_GDESC_P (*local_tls_type))
2657 {
2658 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2659 - elf_i386_compute_jump_table_size (htab);
2660 htab->elf.sgotplt->size += 8;
2661 *local_got = (bfd_vma) -2;
2662 }
2663 if (! GOT_TLS_GDESC_P (*local_tls_type)
2664 || GOT_TLS_GD_P (*local_tls_type))
2665 {
2666 *local_got = s->size;
2667 s->size += 4;
2668 if (GOT_TLS_GD_P (*local_tls_type)
2669 || *local_tls_type == GOT_TLS_IE_BOTH)
2670 s->size += 4;
2671 }
2672 if (bfd_link_pic (info)
2673 || GOT_TLS_GD_ANY_P (*local_tls_type)
2674 || (*local_tls_type & GOT_TLS_IE))
2675 {
2676 if (*local_tls_type == GOT_TLS_IE_BOTH)
2677 srel->size += 2 * sizeof (Elf32_External_Rel);
2678 else if (GOT_TLS_GD_P (*local_tls_type)
2679 || ! GOT_TLS_GDESC_P (*local_tls_type))
2680 srel->size += sizeof (Elf32_External_Rel);
2681 if (GOT_TLS_GDESC_P (*local_tls_type))
2682 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2683 }
2684 }
2685 else
2686 *local_got = (bfd_vma) -1;
2687 }
2688 }
2689
2690 if (htab->tls_ld_or_ldm_got.refcount > 0)
2691 {
2692 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2693 relocs. */
2694 htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
2695 htab->elf.sgot->size += 8;
2696 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2697 }
2698 else
2699 htab->tls_ld_or_ldm_got.offset = -1;
2700
2701 /* Allocate global sym .plt and .got entries, and space for global
2702 sym dynamic relocs. */
2703 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2704
2705 /* Allocate .plt and .got entries, and space for local symbols. */
2706 htab_traverse (htab->loc_hash_table,
2707 elf_i386_allocate_local_dynrelocs,
2708 info);
2709
2710 /* For every jump slot reserved in the sgotplt, reloc_count is
2711 incremented. However, when we reserve space for TLS descriptors,
2712 it's not incremented, so in order to compute the space reserved
2713 for them, it suffices to multiply the reloc count by the jump
2714 slot size.
2715
2716 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2717 so that R_386_IRELATIVE entries come last. */
2718 if (htab->elf.srelplt)
2719 {
2720 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2721 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2722 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2723 }
2724 else if (htab->elf.irelplt)
2725 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2726
2727
2728 if (htab->elf.sgotplt)
2729 {
2730 /* Don't allocate .got.plt section if there are no GOT nor PLT
2731 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2732 if ((htab->elf.hgot == NULL
2733 || !htab->elf.hgot->ref_regular_nonweak)
2734 && (htab->elf.sgotplt->size
2735 == get_elf_backend_data (output_bfd)->got_header_size)
2736 && (htab->elf.splt == NULL
2737 || htab->elf.splt->size == 0)
2738 && (htab->elf.sgot == NULL
2739 || htab->elf.sgot->size == 0)
2740 && (htab->elf.iplt == NULL
2741 || htab->elf.iplt->size == 0)
2742 && (htab->elf.igotplt == NULL
2743 || htab->elf.igotplt->size == 0))
2744 htab->elf.sgotplt->size = 0;
2745 }
2746
2747 if (_bfd_elf_eh_frame_present (info))
2748 {
2749 if (htab->plt_eh_frame != NULL
2750 && htab->elf.splt != NULL
2751 && htab->elf.splt->size != 0
2752 && !bfd_is_abs_section (htab->elf.splt->output_section))
2753 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
2754
2755 if (htab->plt_got_eh_frame != NULL
2756 && htab->plt_got != NULL
2757 && htab->plt_got->size != 0
2758 && !bfd_is_abs_section (htab->plt_got->output_section))
2759 htab->plt_got_eh_frame->size
2760 = htab->non_lazy_plt->eh_frame_plt_size;
2761
2762 /* Unwind info for the second PLT and .plt.got sections are
2763 identical. */
2764 if (htab->plt_second_eh_frame != NULL
2765 && htab->plt_second != NULL
2766 && htab->plt_second->size != 0
2767 && !bfd_is_abs_section (htab->plt_second->output_section))
2768 htab->plt_second_eh_frame->size
2769 = htab->non_lazy_plt->eh_frame_plt_size;
2770 }
2771
2772 /* We now have determined the sizes of the various dynamic sections.
2773 Allocate memory for them. */
2774 relocs = FALSE;
2775 for (s = dynobj->sections; s != NULL; s = s->next)
2776 {
2777 bfd_boolean strip_section = TRUE;
2778
2779 if ((s->flags & SEC_LINKER_CREATED) == 0)
2780 continue;
2781
2782 if (s == htab->elf.splt
2783 || s == htab->elf.sgot)
2784 {
2785 /* Strip this section if we don't need it; see the
2786 comment below. */
2787 /* We'd like to strip these sections if they aren't needed, but if
2788 we've exported dynamic symbols from them we must leave them.
2789 It's too late to tell BFD to get rid of the symbols. */
2790
2791 if (htab->elf.hplt != NULL)
2792 strip_section = FALSE;
2793 }
2794 else if (s == htab->elf.sgotplt
2795 || s == htab->elf.iplt
2796 || s == htab->elf.igotplt
2797 || s == htab->plt_second
2798 || s == htab->plt_got
2799 || s == htab->plt_eh_frame
2800 || s == htab->plt_got_eh_frame
2801 || s == htab->plt_second_eh_frame
2802 || s == htab->elf.sdynbss
2803 || s == htab->elf.sdynrelro)
2804 {
2805 /* Strip these too. */
2806 }
2807 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2808 {
2809 if (s->size != 0
2810 && s != htab->elf.srelplt
2811 && s != htab->srelplt2)
2812 relocs = TRUE;
2813
2814 /* We use the reloc_count field as a counter if we need
2815 to copy relocs into the output file. */
2816 s->reloc_count = 0;
2817 }
2818 else
2819 {
2820 /* It's not one of our sections, so don't allocate space. */
2821 continue;
2822 }
2823
2824 if (s->size == 0)
2825 {
2826 /* If we don't need this section, strip it from the
2827 output file. This is mostly to handle .rel.bss and
2828 .rel.plt. We must create both sections in
2829 create_dynamic_sections, because they must be created
2830 before the linker maps input sections to output
2831 sections. The linker does that before
2832 adjust_dynamic_symbol is called, and it is that
2833 function which decides whether anything needs to go
2834 into these sections. */
2835 if (strip_section)
2836 s->flags |= SEC_EXCLUDE;
2837 continue;
2838 }
2839
2840 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2841 continue;
2842
2843 /* Allocate memory for the section contents. We use bfd_zalloc
2844 here in case unused entries are not reclaimed before the
2845 section's contents are written out. This should not happen,
2846 but this way if it does, we get a R_386_NONE reloc instead
2847 of garbage. */
2848 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2849 if (s->contents == NULL)
2850 return FALSE;
2851 }
2852
2853 if (htab->plt_eh_frame != NULL
2854 && htab->plt_eh_frame->contents != NULL)
2855 {
2856 memcpy (htab->plt_eh_frame->contents,
2857 htab->plt.eh_frame_plt,
2858 htab->plt_eh_frame->size);
2859 bfd_put_32 (dynobj, htab->elf.splt->size,
2860 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2861 }
2862
2863 if (htab->plt_got_eh_frame != NULL
2864 && htab->plt_got_eh_frame->contents != NULL)
2865 {
2866 memcpy (htab->plt_got_eh_frame->contents,
2867 htab->non_lazy_plt->eh_frame_plt,
2868 htab->plt_got_eh_frame->size);
2869 bfd_put_32 (dynobj, htab->plt_got->size,
2870 (htab->plt_got_eh_frame->contents
2871 + PLT_FDE_LEN_OFFSET));
2872 }
2873
2874 if (htab->plt_second_eh_frame != NULL
2875 && htab->plt_second_eh_frame->contents != NULL)
2876 {
2877 memcpy (htab->plt_second_eh_frame->contents,
2878 htab->non_lazy_plt->eh_frame_plt,
2879 htab->plt_second_eh_frame->size);
2880 bfd_put_32 (dynobj, htab->plt_second->size,
2881 (htab->plt_second_eh_frame->contents
2882 + PLT_FDE_LEN_OFFSET));
2883 }
2884
2885 if (htab->elf.dynamic_sections_created)
2886 {
2887 /* Add some entries to the .dynamic section. We fill in the
2888 values later, in elf_i386_finish_dynamic_sections, but we
2889 must add the entries now so that we get the correct size for
2890 the .dynamic section. The DT_DEBUG entry is filled in by the
2891 dynamic linker and used by the debugger. */
2892 #define add_dynamic_entry(TAG, VAL) \
2893 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2894
2895 if (bfd_link_executable (info))
2896 {
2897 if (!add_dynamic_entry (DT_DEBUG, 0))
2898 return FALSE;
2899 }
2900
2901 if (htab->elf.splt->size != 0)
2902 {
2903 /* DT_PLTGOT is used by prelink even if there is no PLT
2904 relocation. */
2905 if (!add_dynamic_entry (DT_PLTGOT, 0))
2906 return FALSE;
2907 }
2908
2909 if (htab->elf.srelplt->size != 0)
2910 {
2911 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2912 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2913 || !add_dynamic_entry (DT_JMPREL, 0))
2914 return FALSE;
2915 }
2916
2917 if (relocs)
2918 {
2919 if (!add_dynamic_entry (DT_REL, 0)
2920 || !add_dynamic_entry (DT_RELSZ, 0)
2921 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2922 return FALSE;
2923
2924 /* If any dynamic relocs apply to a read-only section,
2925 then we need a DT_TEXTREL entry. */
2926 if ((info->flags & DF_TEXTREL) == 0)
2927 elf_link_hash_traverse (&htab->elf,
2928 _bfd_x86_elf_readonly_dynrelocs,
2929 info);
2930
2931 if ((info->flags & DF_TEXTREL) != 0)
2932 {
2933 if (htab->readonly_dynrelocs_against_ifunc)
2934 {
2935 info->callbacks->einfo
2936 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
2937 bfd_set_error (bfd_error_bad_value);
2938 return FALSE;
2939 }
2940
2941 if (!add_dynamic_entry (DT_TEXTREL, 0))
2942 return FALSE;
2943 }
2944 }
2945 if (get_elf_i386_backend_data (output_bfd)->os == is_vxworks
2946 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2947 return FALSE;
2948 }
2949 #undef add_dynamic_entry
2950
2951 return TRUE;
2952 }
2953
2954 /* Set the correct type for an x86 ELF section. We do this by the
2955 section name, which is a hack, but ought to work. */
2956
2957 static bfd_boolean
2958 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2959 Elf_Internal_Shdr *hdr,
2960 asection *sec)
2961 {
2962 const char *name;
2963
2964 name = bfd_get_section_name (abfd, sec);
2965
2966 /* This is an ugly, but unfortunately necessary hack that is
2967 needed when producing EFI binaries on x86. It tells
2968 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2969 containing ELF relocation info. We need this hack in order to
2970 be able to generate ELF binaries that can be translated into
2971 EFI applications (which are essentially COFF objects). Those
2972 files contain a COFF ".reloc" section inside an ELFNN object,
2973 which would normally cause BFD to segfault because it would
2974 attempt to interpret this section as containing relocation
2975 entries for section "oc". With this hack enabled, ".reloc"
2976 will be treated as a normal data section, which will avoid the
2977 segfault. However, you won't be able to create an ELFNN binary
2978 with a section named "oc" that needs relocations, but that's
2979 the kind of ugly side-effects you get when detecting section
2980 types based on their names... In practice, this limitation is
2981 unlikely to bite. */
2982 if (strcmp (name, ".reloc") == 0)
2983 hdr->sh_type = SHT_PROGBITS;
2984
2985 return TRUE;
2986 }
2987
2988 /* Return the relocation value for @tpoff relocation
2989 if STT_TLS virtual address is ADDRESS. */
2990
2991 static bfd_vma
2992 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2993 {
2994 struct elf_link_hash_table *htab = elf_hash_table (info);
2995 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2996 bfd_vma static_tls_size;
2997
2998 /* If tls_sec is NULL, we should have signalled an error already. */
2999 if (htab->tls_sec == NULL)
3000 return 0;
3001
3002 /* Consider special static TLS alignment requirements. */
3003 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3004 return static_tls_size + htab->tls_sec->vma - address;
3005 }
3006
3007 /* Relocate an i386 ELF section. */
3008
3009 static bfd_boolean
3010 elf_i386_relocate_section (bfd *output_bfd,
3011 struct bfd_link_info *info,
3012 bfd *input_bfd,
3013 asection *input_section,
3014 bfd_byte *contents,
3015 Elf_Internal_Rela *relocs,
3016 Elf_Internal_Sym *local_syms,
3017 asection **local_sections)
3018 {
3019 struct elf_x86_link_hash_table *htab;
3020 Elf_Internal_Shdr *symtab_hdr;
3021 struct elf_link_hash_entry **sym_hashes;
3022 bfd_vma *local_got_offsets;
3023 bfd_vma *local_tlsdesc_gotents;
3024 Elf_Internal_Rela *rel;
3025 Elf_Internal_Rela *wrel;
3026 Elf_Internal_Rela *relend;
3027 bfd_boolean is_vxworks_tls;
3028 unsigned plt_entry_size;
3029
3030 BFD_ASSERT (is_i386_elf (input_bfd));
3031
3032 /* Skip if check_relocs failed. */
3033 if (input_section->check_relocs_failed)
3034 return FALSE;
3035
3036 htab = elf_x86_hash_table (info, I386_ELF_DATA);
3037 if (htab == NULL)
3038 return FALSE;
3039 symtab_hdr = &elf_symtab_hdr (input_bfd);
3040 sym_hashes = elf_sym_hashes (input_bfd);
3041 local_got_offsets = elf_local_got_offsets (input_bfd);
3042 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3043 /* We have to handle relocations in vxworks .tls_vars sections
3044 specially, because the dynamic loader is 'weird'. */
3045 is_vxworks_tls = ((get_elf_i386_backend_data (output_bfd)->os
3046 == is_vxworks)
3047 && bfd_link_pic (info)
3048 && !strcmp (input_section->output_section->name,
3049 ".tls_vars"));
3050
3051 _bfd_x86_elf_set_tls_module_base (info);
3052
3053 plt_entry_size = htab->plt.plt_entry_size;
3054
3055 rel = wrel = relocs;
3056 relend = relocs + input_section->reloc_count;
3057 for (; rel < relend; wrel++, rel++)
3058 {
3059 unsigned int r_type;
3060 reloc_howto_type *howto;
3061 unsigned long r_symndx;
3062 struct elf_link_hash_entry *h;
3063 struct elf_x86_link_hash_entry *eh;
3064 Elf_Internal_Sym *sym;
3065 asection *sec;
3066 bfd_vma off, offplt, plt_offset;
3067 bfd_vma relocation;
3068 bfd_boolean unresolved_reloc;
3069 bfd_reloc_status_type r;
3070 unsigned int indx;
3071 int tls_type;
3072 bfd_vma st_size;
3073 asection *resolved_plt;
3074 bfd_boolean resolved_to_zero;
3075 bfd_boolean relative_reloc;
3076
3077 r_type = ELF32_R_TYPE (rel->r_info);
3078 if (r_type == R_386_GNU_VTINHERIT
3079 || r_type == R_386_GNU_VTENTRY)
3080 {
3081 if (wrel != rel)
3082 *wrel = *rel;
3083 continue;
3084 }
3085
3086 if ((indx = r_type) >= R_386_standard
3087 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3088 >= R_386_ext - R_386_standard)
3089 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3090 >= R_386_ext2 - R_386_ext))
3091 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
3092
3093 howto = elf_howto_table + indx;
3094
3095 r_symndx = ELF32_R_SYM (rel->r_info);
3096 h = NULL;
3097 sym = NULL;
3098 sec = NULL;
3099 unresolved_reloc = FALSE;
3100 if (r_symndx < symtab_hdr->sh_info)
3101 {
3102 sym = local_syms + r_symndx;
3103 sec = local_sections[r_symndx];
3104 relocation = (sec->output_section->vma
3105 + sec->output_offset
3106 + sym->st_value);
3107 st_size = sym->st_size;
3108
3109 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3110 && ((sec->flags & SEC_MERGE) != 0
3111 || (bfd_link_relocatable (info)
3112 && sec->output_offset != 0)))
3113 {
3114 bfd_vma addend;
3115 bfd_byte *where = contents + rel->r_offset;
3116
3117 switch (howto->size)
3118 {
3119 case 0:
3120 addend = bfd_get_8 (input_bfd, where);
3121 if (howto->pc_relative)
3122 {
3123 addend = (addend ^ 0x80) - 0x80;
3124 addend += 1;
3125 }
3126 break;
3127 case 1:
3128 addend = bfd_get_16 (input_bfd, where);
3129 if (howto->pc_relative)
3130 {
3131 addend = (addend ^ 0x8000) - 0x8000;
3132 addend += 2;
3133 }
3134 break;
3135 case 2:
3136 addend = bfd_get_32 (input_bfd, where);
3137 if (howto->pc_relative)
3138 {
3139 addend = (addend ^ 0x80000000) - 0x80000000;
3140 addend += 4;
3141 }
3142 break;
3143 default:
3144 abort ();
3145 }
3146
3147 if (bfd_link_relocatable (info))
3148 addend += sec->output_offset;
3149 else
3150 {
3151 asection *msec = sec;
3152 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3153 addend);
3154 addend -= relocation;
3155 addend += msec->output_section->vma + msec->output_offset;
3156 }
3157
3158 switch (howto->size)
3159 {
3160 case 0:
3161 /* FIXME: overflow checks. */
3162 if (howto->pc_relative)
3163 addend -= 1;
3164 bfd_put_8 (input_bfd, addend, where);
3165 break;
3166 case 1:
3167 if (howto->pc_relative)
3168 addend -= 2;
3169 bfd_put_16 (input_bfd, addend, where);
3170 break;
3171 case 2:
3172 if (howto->pc_relative)
3173 addend -= 4;
3174 bfd_put_32 (input_bfd, addend, where);
3175 break;
3176 }
3177 }
3178 else if (!bfd_link_relocatable (info)
3179 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3180 {
3181 /* Relocate against local STT_GNU_IFUNC symbol. */
3182 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
3183 FALSE);
3184 if (h == NULL)
3185 abort ();
3186
3187 /* Set STT_GNU_IFUNC symbol value. */
3188 h->root.u.def.value = sym->st_value;
3189 h->root.u.def.section = sec;
3190 }
3191 }
3192 else
3193 {
3194 bfd_boolean warned ATTRIBUTE_UNUSED;
3195 bfd_boolean ignored ATTRIBUTE_UNUSED;
3196
3197 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3198 r_symndx, symtab_hdr, sym_hashes,
3199 h, sec, relocation,
3200 unresolved_reloc, warned, ignored);
3201 st_size = h->size;
3202 }
3203
3204 if (sec != NULL && discarded_section (sec))
3205 {
3206 _bfd_clear_contents (howto, input_bfd, input_section,
3207 contents + rel->r_offset);
3208 wrel->r_offset = rel->r_offset;
3209 wrel->r_info = 0;
3210 wrel->r_addend = 0;
3211
3212 /* For ld -r, remove relocations in debug sections against
3213 sections defined in discarded sections. Not done for
3214 eh_frame editing code expects to be present. */
3215 if (bfd_link_relocatable (info)
3216 && (input_section->flags & SEC_DEBUGGING))
3217 wrel--;
3218
3219 continue;
3220 }
3221
3222 if (bfd_link_relocatable (info))
3223 {
3224 if (wrel != rel)
3225 *wrel = *rel;
3226 continue;
3227 }
3228
3229 eh = (struct elf_x86_link_hash_entry *) h;
3230
3231 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3232 it here if it is defined in a non-shared object. */
3233 if (h != NULL
3234 && h->type == STT_GNU_IFUNC
3235 && h->def_regular)
3236 {
3237 asection *gotplt, *base_got;
3238 bfd_vma plt_index;
3239 const char *name;
3240
3241 if ((input_section->flags & SEC_ALLOC) == 0)
3242 {
3243 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3244 sections because such sections are not SEC_ALLOC and
3245 thus ld.so will not process them. */
3246 if ((input_section->flags & SEC_DEBUGGING) != 0)
3247 continue;
3248 abort ();
3249 }
3250
3251 /* STT_GNU_IFUNC symbol must go through PLT. */
3252 if (htab->elf.splt != NULL)
3253 {
3254 if (htab->plt_second != NULL)
3255 {
3256 resolved_plt = htab->plt_second;
3257 plt_offset = eh->plt_second.offset;
3258 }
3259 else
3260 {
3261 resolved_plt = htab->elf.splt;
3262 plt_offset = h->plt.offset;
3263 }
3264 gotplt = htab->elf.sgotplt;
3265 }
3266 else
3267 {
3268 resolved_plt = htab->elf.iplt;
3269 plt_offset = h->plt.offset;
3270 gotplt = htab->elf.igotplt;
3271 }
3272
3273 switch (r_type)
3274 {
3275 default:
3276 break;
3277
3278 case R_386_GOT32:
3279 case R_386_GOT32X:
3280 base_got = htab->elf.sgot;
3281 off = h->got.offset;
3282
3283 if (base_got == NULL)
3284 abort ();
3285
3286 if (off == (bfd_vma) -1)
3287 {
3288 /* We can't use h->got.offset here to save state, or
3289 even just remember the offset, as finish_dynamic_symbol
3290 would use that as offset into .got. */
3291
3292 if (h->plt.offset == (bfd_vma) -1)
3293 abort ();
3294
3295 if (htab->elf.splt != NULL)
3296 {
3297 plt_index = (h->plt.offset / plt_entry_size
3298 - htab->plt.has_plt0);
3299 off = (plt_index + 3) * 4;
3300 base_got = htab->elf.sgotplt;
3301 }
3302 else
3303 {
3304 plt_index = h->plt.offset / plt_entry_size;
3305 off = plt_index * 4;
3306 base_got = htab->elf.igotplt;
3307 }
3308
3309 if (h->dynindx == -1
3310 || h->forced_local
3311 || info->symbolic)
3312 {
3313 /* This references the local defitionion. We must
3314 initialize this entry in the global offset table.
3315 Since the offset must always be a multiple of 8,
3316 we use the least significant bit to record
3317 whether we have initialized it already.
3318
3319 When doing a dynamic link, we create a .rela.got
3320 relocation entry to initialize the value. This
3321 is done in the finish_dynamic_symbol routine. */
3322 if ((off & 1) != 0)
3323 off &= ~1;
3324 else
3325 {
3326 bfd_put_32 (output_bfd, relocation,
3327 base_got->contents + off);
3328 h->got.offset |= 1;
3329 }
3330 }
3331
3332 relocation = off;
3333 }
3334 else
3335 relocation = (base_got->output_section->vma
3336 + base_got->output_offset + off
3337 - gotplt->output_section->vma
3338 - gotplt->output_offset);
3339
3340 if (rel->r_offset > 1
3341 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3342 && *(contents + rel->r_offset - 2) != 0x8d)
3343 {
3344 if (bfd_link_pic (info))
3345 goto disallow_got32;
3346
3347 /* Add the GOT base if there is no base register. */
3348 relocation += (gotplt->output_section->vma
3349 + gotplt->output_offset);
3350 }
3351 else if (htab->elf.splt == NULL)
3352 {
3353 /* Adjust for static executables. */
3354 relocation += gotplt->output_offset;
3355 }
3356
3357 goto do_relocation;
3358 }
3359
3360 if (h->plt.offset == (bfd_vma) -1)
3361 {
3362 /* Handle static pointers of STT_GNU_IFUNC symbols. */
3363 if (r_type == R_386_32
3364 && (input_section->flags & SEC_CODE) == 0)
3365 goto do_ifunc_pointer;
3366 goto bad_ifunc_reloc;
3367 }
3368
3369 relocation = (resolved_plt->output_section->vma
3370 + resolved_plt->output_offset + plt_offset);
3371
3372 switch (r_type)
3373 {
3374 default:
3375 bad_ifunc_reloc:
3376 if (h->root.root.string)
3377 name = h->root.root.string;
3378 else
3379 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3380 NULL);
3381 _bfd_error_handler
3382 /* xgettext:c-format */
3383 (_("%B: relocation %s against STT_GNU_IFUNC "
3384 "symbol `%s' isn't supported"), input_bfd,
3385 howto->name, name);
3386 bfd_set_error (bfd_error_bad_value);
3387 return FALSE;
3388
3389 case R_386_32:
3390 /* Generate dynamic relcoation only when there is a
3391 non-GOT reference in a shared object. */
3392 if ((bfd_link_pic (info) && h->non_got_ref)
3393 || h->plt.offset == (bfd_vma) -1)
3394 {
3395 Elf_Internal_Rela outrel;
3396 asection *sreloc;
3397 bfd_vma offset;
3398
3399 do_ifunc_pointer:
3400 /* Need a dynamic relocation to get the real function
3401 adddress. */
3402 offset = _bfd_elf_section_offset (output_bfd,
3403 info,
3404 input_section,
3405 rel->r_offset);
3406 if (offset == (bfd_vma) -1
3407 || offset == (bfd_vma) -2)
3408 abort ();
3409
3410 outrel.r_offset = (input_section->output_section->vma
3411 + input_section->output_offset
3412 + offset);
3413
3414 if (h->dynindx == -1
3415 || h->forced_local
3416 || bfd_link_executable (info))
3417 {
3418 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3419 h->root.root.string,
3420 h->root.u.def.section->owner);
3421
3422 /* This symbol is resolved locally. */
3423 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3424 bfd_put_32 (output_bfd,
3425 (h->root.u.def.value
3426 + h->root.u.def.section->output_section->vma
3427 + h->root.u.def.section->output_offset),
3428 contents + offset);
3429 }
3430 else
3431 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3432
3433 /* Dynamic relocations are stored in
3434 1. .rel.ifunc section in PIC object.
3435 2. .rel.got section in dynamic executable.
3436 3. .rel.iplt section in static executable. */
3437 if (bfd_link_pic (info))
3438 sreloc = htab->elf.irelifunc;
3439 else if (htab->elf.splt != NULL)
3440 sreloc = htab->elf.srelgot;
3441 else
3442 sreloc = htab->elf.irelplt;
3443 elf_append_rel (output_bfd, sreloc, &outrel);
3444
3445 /* If this reloc is against an external symbol, we
3446 do not want to fiddle with the addend. Otherwise,
3447 we need to include the symbol value so that it
3448 becomes an addend for the dynamic reloc. For an
3449 internal symbol, we have updated addend. */
3450 continue;
3451 }
3452 /* FALLTHROUGH */
3453 case R_386_PC32:
3454 case R_386_PLT32:
3455 goto do_relocation;
3456
3457 case R_386_GOTOFF:
3458 relocation -= (gotplt->output_section->vma
3459 + gotplt->output_offset);
3460 goto do_relocation;
3461 }
3462 }
3463
3464 resolved_to_zero = (eh != NULL
3465 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
3466 I386_ELF_DATA,
3467 eh->has_got_reloc,
3468 eh));
3469
3470 switch (r_type)
3471 {
3472 case R_386_GOT32X:
3473 /* Avoid optimizing _DYNAMIC since ld.so may use its
3474 link-time address. */
3475 if (h == htab->elf.hdynamic)
3476 goto r_386_got32;
3477
3478 if (bfd_link_pic (info))
3479 {
3480 /* It is OK to convert mov to lea and convert indirect
3481 branch to direct branch. It is OK to convert adc,
3482 add, and, cmp, or, sbb, sub, test, xor only when PIC
3483 is false. */
3484 unsigned int opcode, addend;
3485 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3486 if (addend != 0)
3487 goto r_386_got32;
3488 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3489 if (opcode != 0x8b && opcode != 0xff)
3490 goto r_386_got32;
3491 }
3492
3493 /* Resolve "mov GOT[(%reg)], %reg",
3494 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
3495 and "binop foo@GOT[(%reg)], %reg". */
3496 if (h == NULL
3497 || (h->plt.offset == (bfd_vma) -1
3498 && h->got.offset == (bfd_vma) -1)
3499 || htab->elf.sgotplt == NULL)
3500 abort ();
3501
3502 offplt = (htab->elf.sgotplt->output_section->vma
3503 + htab->elf.sgotplt->output_offset);
3504
3505 /* It is relative to .got.plt section. */
3506 if (h->got.offset != (bfd_vma) -1)
3507 /* Use GOT entry. Mask off the least significant bit in
3508 GOT offset which may be set by R_386_GOT32 processing
3509 below. */
3510 relocation = (htab->elf.sgot->output_section->vma
3511 + htab->elf.sgot->output_offset
3512 + (h->got.offset & ~1) - offplt);
3513 else
3514 /* Use GOTPLT entry. */
3515 relocation = (h->plt.offset / plt_entry_size
3516 - htab->plt.has_plt0 + 3) * 4;
3517
3518 if (!bfd_link_pic (info))
3519 {
3520 /* If not PIC, add the .got.plt section address for
3521 baseless addressing. */
3522 unsigned int modrm;
3523 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3524 if ((modrm & 0xc7) == 0x5)
3525 relocation += offplt;
3526 }
3527
3528 unresolved_reloc = FALSE;
3529 break;
3530
3531 case R_386_GOT32:
3532 r_386_got32:
3533 /* Relocation is to the entry for this symbol in the global
3534 offset table. */
3535 if (htab->elf.sgot == NULL)
3536 abort ();
3537
3538 relative_reloc = FALSE;
3539 if (h != NULL)
3540 {
3541 bfd_boolean dyn;
3542
3543 off = h->got.offset;
3544 dyn = htab->elf.dynamic_sections_created;
3545 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3546 bfd_link_pic (info),
3547 h)
3548 || (bfd_link_pic (info)
3549 && SYMBOL_REFERENCES_LOCAL (info, h))
3550 || (ELF_ST_VISIBILITY (h->other)
3551 && h->root.type == bfd_link_hash_undefweak))
3552 {
3553 /* This is actually a static link, or it is a
3554 -Bsymbolic link and the symbol is defined
3555 locally, or the symbol was forced to be local
3556 because of a version file. We must initialize
3557 this entry in the global offset table. Since the
3558 offset must always be a multiple of 4, we use the
3559 least significant bit to record whether we have
3560 initialized it already.
3561
3562 When doing a dynamic link, we create a .rel.got
3563 relocation entry to initialize the value. This
3564 is done in the finish_dynamic_symbol routine. */
3565 if ((off & 1) != 0)
3566 off &= ~1;
3567 else
3568 {
3569 bfd_put_32 (output_bfd, relocation,
3570 htab->elf.sgot->contents + off);
3571 h->got.offset |= 1;
3572
3573 if (h->dynindx == -1
3574 && !h->forced_local
3575 && h->root.type != bfd_link_hash_undefweak
3576 && bfd_link_pic (info))
3577 {
3578 /* PR ld/21402: If this symbol isn't dynamic
3579 in PIC, generate R_386_RELATIVE here. */
3580 eh->no_finish_dynamic_symbol = 1;
3581 relative_reloc = TRUE;
3582 }
3583 }
3584 }
3585 else
3586 unresolved_reloc = FALSE;
3587 }
3588 else
3589 {
3590 if (local_got_offsets == NULL)
3591 abort ();
3592
3593 off = local_got_offsets[r_symndx];
3594
3595 /* The offset must always be a multiple of 4. We use
3596 the least significant bit to record whether we have
3597 already generated the necessary reloc. */
3598 if ((off & 1) != 0)
3599 off &= ~1;
3600 else
3601 {
3602 bfd_put_32 (output_bfd, relocation,
3603 htab->elf.sgot->contents + off);
3604 local_got_offsets[r_symndx] |= 1;
3605
3606 if (bfd_link_pic (info))
3607 relative_reloc = TRUE;
3608 }
3609 }
3610
3611 if (relative_reloc)
3612 {
3613 asection *s;
3614 Elf_Internal_Rela outrel;
3615
3616 s = htab->elf.srelgot;
3617 if (s == NULL)
3618 abort ();
3619
3620 outrel.r_offset = (htab->elf.sgot->output_section->vma
3621 + htab->elf.sgot->output_offset
3622 + off);
3623 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3624 elf_append_rel (output_bfd, s, &outrel);
3625 }
3626
3627 if (off >= (bfd_vma) -2)
3628 abort ();
3629
3630 relocation = (htab->elf.sgot->output_section->vma
3631 + htab->elf.sgot->output_offset + off);
3632 if (rel->r_offset > 1
3633 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3634 && *(contents + rel->r_offset - 2) != 0x8d)
3635 {
3636 if (bfd_link_pic (info))
3637 {
3638 /* For PIC, disallow R_386_GOT32 without a base
3639 register, except for "lea foo@GOT, %reg", since
3640 we don't know what the GOT base is. */
3641 const char *name;
3642
3643 disallow_got32:
3644 if (h == NULL || h->root.root.string == NULL)
3645 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3646 NULL);
3647 else
3648 name = h->root.root.string;
3649
3650 _bfd_error_handler
3651 /* xgettext:c-format */
3652 (_("%B: direct GOT relocation %s against `%s'"
3653 " without base register can not be used"
3654 " when making a shared object"),
3655 input_bfd, howto->name, name);
3656 bfd_set_error (bfd_error_bad_value);
3657 return FALSE;
3658 }
3659 }
3660 else
3661 {
3662 /* Subtract the .got.plt section address only with a base
3663 register. */
3664 relocation -= (htab->elf.sgotplt->output_section->vma
3665 + htab->elf.sgotplt->output_offset);
3666 }
3667
3668 break;
3669
3670 case R_386_GOTOFF:
3671 /* Relocation is relative to the start of the global offset
3672 table. */
3673
3674 /* Check to make sure it isn't a protected function or data
3675 symbol for shared library since it may not be local when
3676 used as function address or with copy relocation. We also
3677 need to make sure that a symbol is referenced locally. */
3678 if (!bfd_link_executable (info) && h)
3679 {
3680 if (!h->def_regular)
3681 {
3682 const char *v;
3683
3684 switch (ELF_ST_VISIBILITY (h->other))
3685 {
3686 case STV_HIDDEN:
3687 v = _("hidden symbol");
3688 break;
3689 case STV_INTERNAL:
3690 v = _("internal symbol");
3691 break;
3692 case STV_PROTECTED:
3693 v = _("protected symbol");
3694 break;
3695 default:
3696 v = _("symbol");
3697 break;
3698 }
3699
3700 _bfd_error_handler
3701 /* xgettext:c-format */
3702 (_("%B: relocation R_386_GOTOFF against undefined %s"
3703 " `%s' can not be used when making a shared object"),
3704 input_bfd, v, h->root.root.string);
3705 bfd_set_error (bfd_error_bad_value);
3706 return FALSE;
3707 }
3708 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3709 && (h->type == STT_FUNC
3710 || h->type == STT_OBJECT)
3711 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3712 {
3713 _bfd_error_handler
3714 /* xgettext:c-format */
3715 (_("%B: relocation R_386_GOTOFF against protected %s"
3716 " `%s' can not be used when making a shared object"),
3717 input_bfd,
3718 h->type == STT_FUNC ? "function" : "data",
3719 h->root.root.string);
3720 bfd_set_error (bfd_error_bad_value);
3721 return FALSE;
3722 }
3723 }
3724
3725 /* Note that sgot is not involved in this
3726 calculation. We always want the start of .got.plt. If we
3727 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3728 permitted by the ABI, we might have to change this
3729 calculation. */
3730 relocation -= htab->elf.sgotplt->output_section->vma
3731 + htab->elf.sgotplt->output_offset;
3732 break;
3733
3734 case R_386_GOTPC:
3735 /* Use global offset table as symbol value. */
3736 relocation = htab->elf.sgotplt->output_section->vma
3737 + htab->elf.sgotplt->output_offset;
3738 unresolved_reloc = FALSE;
3739 break;
3740
3741 case R_386_PLT32:
3742 /* Relocation is to the entry for this symbol in the
3743 procedure linkage table. */
3744
3745 /* Resolve a PLT32 reloc against a local symbol directly,
3746 without using the procedure linkage table. */
3747 if (h == NULL)
3748 break;
3749
3750 if ((h->plt.offset == (bfd_vma) -1
3751 && eh->plt_got.offset == (bfd_vma) -1)
3752 || htab->elf.splt == NULL)
3753 {
3754 /* We didn't make a PLT entry for this symbol. This
3755 happens when statically linking PIC code, or when
3756 using -Bsymbolic. */
3757 break;
3758 }
3759
3760 if (h->plt.offset != (bfd_vma) -1)
3761 {
3762 if (htab->plt_second != NULL)
3763 {
3764 resolved_plt = htab->plt_second;
3765 plt_offset = eh->plt_second.offset;
3766 }
3767 else
3768 {
3769 resolved_plt = htab->elf.splt;
3770 plt_offset = h->plt.offset;
3771 }
3772 }
3773 else
3774 {
3775 resolved_plt = htab->plt_got;
3776 plt_offset = eh->plt_got.offset;
3777 }
3778
3779 relocation = (resolved_plt->output_section->vma
3780 + resolved_plt->output_offset
3781 + plt_offset);
3782 unresolved_reloc = FALSE;
3783 break;
3784
3785 case R_386_SIZE32:
3786 /* Set to symbol size. */
3787 relocation = st_size;
3788 /* Fall through. */
3789
3790 case R_386_32:
3791 case R_386_PC32:
3792 if ((input_section->flags & SEC_ALLOC) == 0
3793 || is_vxworks_tls)
3794 break;
3795
3796 /* Copy dynamic function pointer relocations. Don't generate
3797 dynamic relocations against resolved undefined weak symbols
3798 in PIE, except for R_386_PC32. */
3799 if ((bfd_link_pic (info)
3800 && (h == NULL
3801 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3802 && (!resolved_to_zero
3803 || r_type == R_386_PC32))
3804 || h->root.type != bfd_link_hash_undefweak))
3805 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3806 || !SYMBOL_CALLS_LOCAL (info, h)))
3807 || (ELIMINATE_COPY_RELOCS
3808 && !bfd_link_pic (info)
3809 && h != NULL
3810 && h->dynindx != -1
3811 && (!h->non_got_ref
3812 || eh->func_pointer_refcount > 0
3813 || (h->root.type == bfd_link_hash_undefweak
3814 && !resolved_to_zero))
3815 && ((h->def_dynamic && !h->def_regular)
3816 /* Undefined weak symbol is bound locally when
3817 PIC is false. */
3818 || h->root.type == bfd_link_hash_undefweak)))
3819 {
3820 Elf_Internal_Rela outrel;
3821 bfd_boolean skip, relocate;
3822 asection *sreloc;
3823
3824 /* When generating a shared object, these relocations
3825 are copied into the output file to be resolved at run
3826 time. */
3827
3828 skip = FALSE;
3829 relocate = FALSE;
3830
3831 outrel.r_offset =
3832 _bfd_elf_section_offset (output_bfd, info, input_section,
3833 rel->r_offset);
3834 if (outrel.r_offset == (bfd_vma) -1)
3835 skip = TRUE;
3836 else if (outrel.r_offset == (bfd_vma) -2)
3837 skip = TRUE, relocate = TRUE;
3838 outrel.r_offset += (input_section->output_section->vma
3839 + input_section->output_offset);
3840
3841 if (skip)
3842 memset (&outrel, 0, sizeof outrel);
3843 else if (h != NULL
3844 && h->dynindx != -1
3845 && (r_type == R_386_PC32
3846 || !(bfd_link_executable (info)
3847 || SYMBOLIC_BIND (info, h))
3848 || !h->def_regular))
3849 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3850 else
3851 {
3852 /* This symbol is local, or marked to become local. */
3853 relocate = TRUE;
3854 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3855 }
3856
3857 sreloc = elf_section_data (input_section)->sreloc;
3858
3859 if (sreloc == NULL || sreloc->contents == NULL)
3860 {
3861 r = bfd_reloc_notsupported;
3862 goto check_relocation_error;
3863 }
3864
3865 elf_append_rel (output_bfd, sreloc, &outrel);
3866
3867 /* If this reloc is against an external symbol, we do
3868 not want to fiddle with the addend. Otherwise, we
3869 need to include the symbol value so that it becomes
3870 an addend for the dynamic reloc. */
3871 if (! relocate)
3872 continue;
3873 }
3874 break;
3875
3876 case R_386_TLS_IE:
3877 if (!bfd_link_executable (info))
3878 {
3879 Elf_Internal_Rela outrel;
3880 asection *sreloc;
3881
3882 outrel.r_offset = rel->r_offset
3883 + input_section->output_section->vma
3884 + input_section->output_offset;
3885 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3886 sreloc = elf_section_data (input_section)->sreloc;
3887 if (sreloc == NULL)
3888 abort ();
3889 elf_append_rel (output_bfd, sreloc, &outrel);
3890 }
3891 /* Fall through */
3892
3893 case R_386_TLS_GD:
3894 case R_386_TLS_GOTDESC:
3895 case R_386_TLS_DESC_CALL:
3896 case R_386_TLS_IE_32:
3897 case R_386_TLS_GOTIE:
3898 tls_type = GOT_UNKNOWN;
3899 if (h == NULL && local_got_offsets)
3900 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
3901 else if (h != NULL)
3902 tls_type = elf_x86_hash_entry(h)->tls_type;
3903 if (tls_type == GOT_TLS_IE)
3904 tls_type = GOT_TLS_IE_NEG;
3905
3906 if (! elf_i386_tls_transition (info, input_bfd,
3907 input_section, contents,
3908 symtab_hdr, sym_hashes,
3909 &r_type, tls_type, rel,
3910 relend, h, r_symndx, TRUE))
3911 return FALSE;
3912
3913 if (r_type == R_386_TLS_LE_32)
3914 {
3915 BFD_ASSERT (! unresolved_reloc);
3916 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3917 {
3918 unsigned int type;
3919 bfd_vma roff;
3920
3921 /* GD->LE transition. */
3922 type = *(contents + rel->r_offset - 2);
3923 if (type == 0x04)
3924 {
3925 /* Change
3926 leal foo@tlsgd(,%ebx,1), %eax
3927 call ___tls_get_addr@PLT
3928 into:
3929 movl %gs:0, %eax
3930 subl $foo@tpoff, %eax
3931 (6 byte form of subl). */
3932 roff = rel->r_offset + 5;
3933 }
3934 else
3935 {
3936 /* Change
3937 leal foo@tlsgd(%ebx), %eax
3938 call ___tls_get_addr@PLT
3939 nop
3940 or
3941 leal foo@tlsgd(%reg), %eax
3942 call *___tls_get_addr@GOT(%reg)
3943 which may be converted to
3944 addr32 call ___tls_get_addr
3945 into:
3946 movl %gs:0, %eax; subl $foo@tpoff, %eax
3947 (6 byte form of subl). */
3948 roff = rel->r_offset + 6;
3949 }
3950 memcpy (contents + roff - 8,
3951 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3952 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3953 contents + roff);
3954 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
3955 rel++;
3956 wrel++;
3957 continue;
3958 }
3959 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3960 {
3961 /* GDesc -> LE transition.
3962 It's originally something like:
3963 leal x@tlsdesc(%ebx), %eax
3964
3965 leal x@ntpoff, %eax
3966
3967 Registers other than %eax may be set up here. */
3968
3969 unsigned int val;
3970 bfd_vma roff;
3971
3972 roff = rel->r_offset;
3973 val = bfd_get_8 (input_bfd, contents + roff - 1);
3974
3975 /* Now modify the instruction as appropriate. */
3976 /* aoliva FIXME: remove the above and xor the byte
3977 below with 0x86. */
3978 bfd_put_8 (output_bfd, val ^ 0x86,
3979 contents + roff - 1);
3980 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3981 contents + roff);
3982 continue;
3983 }
3984 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3985 {
3986 /* GDesc -> LE transition.
3987 It's originally:
3988 call *(%eax)
3989 Turn it into:
3990 xchg %ax,%ax */
3991
3992 bfd_vma roff;
3993
3994 roff = rel->r_offset;
3995 bfd_put_8 (output_bfd, 0x66, contents + roff);
3996 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3997 continue;
3998 }
3999 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4000 {
4001 unsigned int val;
4002
4003 /* IE->LE transition:
4004 Originally it can be one of:
4005 movl foo, %eax
4006 movl foo, %reg
4007 addl foo, %reg
4008 We change it into:
4009 movl $foo, %eax
4010 movl $foo, %reg
4011 addl $foo, %reg. */
4012 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4013 if (val == 0xa1)
4014 {
4015 /* movl foo, %eax. */
4016 bfd_put_8 (output_bfd, 0xb8,
4017 contents + rel->r_offset - 1);
4018 }
4019 else
4020 {
4021 unsigned int type;
4022
4023 type = bfd_get_8 (input_bfd,
4024 contents + rel->r_offset - 2);
4025 switch (type)
4026 {
4027 case 0x8b:
4028 /* movl */
4029 bfd_put_8 (output_bfd, 0xc7,
4030 contents + rel->r_offset - 2);
4031 bfd_put_8 (output_bfd,
4032 0xc0 | ((val >> 3) & 7),
4033 contents + rel->r_offset - 1);
4034 break;
4035 case 0x03:
4036 /* addl */
4037 bfd_put_8 (output_bfd, 0x81,
4038 contents + rel->r_offset - 2);
4039 bfd_put_8 (output_bfd,
4040 0xc0 | ((val >> 3) & 7),
4041 contents + rel->r_offset - 1);
4042 break;
4043 default:
4044 BFD_FAIL ();
4045 break;
4046 }
4047 }
4048 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4049 contents + rel->r_offset);
4050 continue;
4051 }
4052 else
4053 {
4054 unsigned int val, type;
4055
4056 /* {IE_32,GOTIE}->LE transition:
4057 Originally it can be one of:
4058 subl foo(%reg1), %reg2
4059 movl foo(%reg1), %reg2
4060 addl foo(%reg1), %reg2
4061 We change it into:
4062 subl $foo, %reg2
4063 movl $foo, %reg2 (6 byte form)
4064 addl $foo, %reg2. */
4065 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4066 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4067 if (type == 0x8b)
4068 {
4069 /* movl */
4070 bfd_put_8 (output_bfd, 0xc7,
4071 contents + rel->r_offset - 2);
4072 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4073 contents + rel->r_offset - 1);
4074 }
4075 else if (type == 0x2b)
4076 {
4077 /* subl */
4078 bfd_put_8 (output_bfd, 0x81,
4079 contents + rel->r_offset - 2);
4080 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4081 contents + rel->r_offset - 1);
4082 }
4083 else if (type == 0x03)
4084 {
4085 /* addl */
4086 bfd_put_8 (output_bfd, 0x81,
4087 contents + rel->r_offset - 2);
4088 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4089 contents + rel->r_offset - 1);
4090 }
4091 else
4092 BFD_FAIL ();
4093 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4094 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4095 contents + rel->r_offset);
4096 else
4097 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4098 contents + rel->r_offset);
4099 continue;
4100 }
4101 }
4102
4103 if (htab->elf.sgot == NULL)
4104 abort ();
4105
4106 if (h != NULL)
4107 {
4108 off = h->got.offset;
4109 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
4110 }
4111 else
4112 {
4113 if (local_got_offsets == NULL)
4114 abort ();
4115
4116 off = local_got_offsets[r_symndx];
4117 offplt = local_tlsdesc_gotents[r_symndx];
4118 }
4119
4120 if ((off & 1) != 0)
4121 off &= ~1;
4122 else
4123 {
4124 Elf_Internal_Rela outrel;
4125 int dr_type;
4126 asection *sreloc;
4127
4128 if (htab->elf.srelgot == NULL)
4129 abort ();
4130
4131 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4132
4133 if (GOT_TLS_GDESC_P (tls_type))
4134 {
4135 bfd_byte *loc;
4136 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4137 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4138 <= htab->elf.sgotplt->size);
4139 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4140 + htab->elf.sgotplt->output_offset
4141 + offplt
4142 + htab->sgotplt_jump_table_size);
4143 sreloc = htab->elf.srelplt;
4144 loc = sreloc->contents;
4145 loc += (htab->next_tls_desc_index++
4146 * sizeof (Elf32_External_Rel));
4147 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4148 <= sreloc->contents + sreloc->size);
4149 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4150 if (indx == 0)
4151 {
4152 BFD_ASSERT (! unresolved_reloc);
4153 bfd_put_32 (output_bfd,
4154 relocation - _bfd_x86_elf_dtpoff_base (info),
4155 htab->elf.sgotplt->contents + offplt
4156 + htab->sgotplt_jump_table_size + 4);
4157 }
4158 else
4159 {
4160 bfd_put_32 (output_bfd, 0,
4161 htab->elf.sgotplt->contents + offplt
4162 + htab->sgotplt_jump_table_size + 4);
4163 }
4164 }
4165
4166 sreloc = htab->elf.srelgot;
4167
4168 outrel.r_offset = (htab->elf.sgot->output_section->vma
4169 + htab->elf.sgot->output_offset + off);
4170
4171 if (GOT_TLS_GD_P (tls_type))
4172 dr_type = R_386_TLS_DTPMOD32;
4173 else if (GOT_TLS_GDESC_P (tls_type))
4174 goto dr_done;
4175 else if (tls_type == GOT_TLS_IE_POS)
4176 dr_type = R_386_TLS_TPOFF;
4177 else
4178 dr_type = R_386_TLS_TPOFF32;
4179
4180 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4181 bfd_put_32 (output_bfd,
4182 relocation - _bfd_x86_elf_dtpoff_base (info),
4183 htab->elf.sgot->contents + off);
4184 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4185 bfd_put_32 (output_bfd,
4186 _bfd_x86_elf_dtpoff_base (info) - relocation,
4187 htab->elf.sgot->contents + off);
4188 else if (dr_type != R_386_TLS_DESC)
4189 bfd_put_32 (output_bfd, 0,
4190 htab->elf.sgot->contents + off);
4191 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4192
4193 elf_append_rel (output_bfd, sreloc, &outrel);
4194
4195 if (GOT_TLS_GD_P (tls_type))
4196 {
4197 if (indx == 0)
4198 {
4199 BFD_ASSERT (! unresolved_reloc);
4200 bfd_put_32 (output_bfd,
4201 relocation - _bfd_x86_elf_dtpoff_base (info),
4202 htab->elf.sgot->contents + off + 4);
4203 }
4204 else
4205 {
4206 bfd_put_32 (output_bfd, 0,
4207 htab->elf.sgot->contents + off + 4);
4208 outrel.r_info = ELF32_R_INFO (indx,
4209 R_386_TLS_DTPOFF32);
4210 outrel.r_offset += 4;
4211 elf_append_rel (output_bfd, sreloc, &outrel);
4212 }
4213 }
4214 else if (tls_type == GOT_TLS_IE_BOTH)
4215 {
4216 bfd_put_32 (output_bfd,
4217 (indx == 0
4218 ? relocation - _bfd_x86_elf_dtpoff_base (info)
4219 : 0),
4220 htab->elf.sgot->contents + off + 4);
4221 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4222 outrel.r_offset += 4;
4223 elf_append_rel (output_bfd, sreloc, &outrel);
4224 }
4225
4226 dr_done:
4227 if (h != NULL)
4228 h->got.offset |= 1;
4229 else
4230 local_got_offsets[r_symndx] |= 1;
4231 }
4232
4233 if (off >= (bfd_vma) -2
4234 && ! GOT_TLS_GDESC_P (tls_type))
4235 abort ();
4236 if (r_type == R_386_TLS_GOTDESC
4237 || r_type == R_386_TLS_DESC_CALL)
4238 {
4239 relocation = htab->sgotplt_jump_table_size + offplt;
4240 unresolved_reloc = FALSE;
4241 }
4242 else if (r_type == ELF32_R_TYPE (rel->r_info))
4243 {
4244 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4245 + htab->elf.sgotplt->output_offset;
4246 relocation = htab->elf.sgot->output_section->vma
4247 + htab->elf.sgot->output_offset + off - g_o_t;
4248 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4249 && tls_type == GOT_TLS_IE_BOTH)
4250 relocation += 4;
4251 if (r_type == R_386_TLS_IE)
4252 relocation += g_o_t;
4253 unresolved_reloc = FALSE;
4254 }
4255 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4256 {
4257 unsigned int val, type;
4258 bfd_vma roff;
4259
4260 /* GD->IE transition. */
4261 type = *(contents + rel->r_offset - 2);
4262 val = *(contents + rel->r_offset - 1);
4263 if (type == 0x04)
4264 {
4265 /* Change
4266 leal foo@tlsgd(,%ebx,1), %eax
4267 call ___tls_get_addr@PLT
4268 into:
4269 movl %gs:0, %eax
4270 subl $foo@gottpoff(%ebx), %eax. */
4271 val >>= 3;
4272 roff = rel->r_offset - 3;
4273 }
4274 else
4275 {
4276 /* Change
4277 leal foo@tlsgd(%ebx), %eax
4278 call ___tls_get_addr@PLT
4279 nop
4280 or
4281 leal foo@tlsgd(%reg), %eax
4282 call *___tls_get_addr@GOT(%reg)
4283 which may be converted to
4284 addr32 call ___tls_get_addr
4285 into:
4286 movl %gs:0, %eax;
4287 subl $foo@gottpoff(%reg), %eax. */
4288 roff = rel->r_offset - 2;
4289 }
4290 memcpy (contents + roff,
4291 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4292 contents[roff + 7] = 0x80 | (val & 7);
4293 /* If foo is used only with foo@gotntpoff(%reg) and
4294 foo@indntpoff, but not with foo@gottpoff(%reg), change
4295 subl $foo@gottpoff(%reg), %eax
4296 into:
4297 addl $foo@gotntpoff(%reg), %eax. */
4298 if (tls_type == GOT_TLS_IE_POS)
4299 contents[roff + 6] = 0x03;
4300 bfd_put_32 (output_bfd,
4301 htab->elf.sgot->output_section->vma
4302 + htab->elf.sgot->output_offset + off
4303 - htab->elf.sgotplt->output_section->vma
4304 - htab->elf.sgotplt->output_offset,
4305 contents + roff + 8);
4306 /* Skip R_386_PLT32 and R_386_GOT32X. */
4307 rel++;
4308 wrel++;
4309 continue;
4310 }
4311 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4312 {
4313 /* GDesc -> IE transition.
4314 It's originally something like:
4315 leal x@tlsdesc(%ebx), %eax
4316
4317 Change it to:
4318 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4319 or:
4320 movl x@gottpoff(%ebx), %eax # before negl %eax
4321
4322 Registers other than %eax may be set up here. */
4323
4324 bfd_vma roff;
4325
4326 /* First, make sure it's a leal adding ebx to a 32-bit
4327 offset into any register, although it's probably
4328 almost always going to be eax. */
4329 roff = rel->r_offset;
4330
4331 /* Now modify the instruction as appropriate. */
4332 /* To turn a leal into a movl in the form we use it, it
4333 suffices to change the first byte from 0x8d to 0x8b.
4334 aoliva FIXME: should we decide to keep the leal, all
4335 we have to do is remove the statement below, and
4336 adjust the relaxation of R_386_TLS_DESC_CALL. */
4337 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4338
4339 if (tls_type == GOT_TLS_IE_BOTH)
4340 off += 4;
4341
4342 bfd_put_32 (output_bfd,
4343 htab->elf.sgot->output_section->vma
4344 + htab->elf.sgot->output_offset + off
4345 - htab->elf.sgotplt->output_section->vma
4346 - htab->elf.sgotplt->output_offset,
4347 contents + roff);
4348 continue;
4349 }
4350 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4351 {
4352 /* GDesc -> IE transition.
4353 It's originally:
4354 call *(%eax)
4355
4356 Change it to:
4357 xchg %ax,%ax
4358 or
4359 negl %eax
4360 depending on how we transformed the TLS_GOTDESC above.
4361 */
4362
4363 bfd_vma roff;
4364
4365 roff = rel->r_offset;
4366
4367 /* Now modify the instruction as appropriate. */
4368 if (tls_type != GOT_TLS_IE_NEG)
4369 {
4370 /* xchg %ax,%ax */
4371 bfd_put_8 (output_bfd, 0x66, contents + roff);
4372 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4373 }
4374 else
4375 {
4376 /* negl %eax */
4377 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4378 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4379 }
4380
4381 continue;
4382 }
4383 else
4384 BFD_ASSERT (FALSE);
4385 break;
4386
4387 case R_386_TLS_LDM:
4388 if (! elf_i386_tls_transition (info, input_bfd,
4389 input_section, contents,
4390 symtab_hdr, sym_hashes,
4391 &r_type, GOT_UNKNOWN, rel,
4392 relend, h, r_symndx, TRUE))
4393 return FALSE;
4394
4395 if (r_type != R_386_TLS_LDM)
4396 {
4397 /* LD->LE transition. Change
4398 leal foo@tlsldm(%ebx) %eax
4399 call ___tls_get_addr@PLT
4400 into:
4401 movl %gs:0, %eax
4402 nop
4403 leal 0(%esi,1), %esi
4404 or change
4405 leal foo@tlsldm(%reg) %eax
4406 call *___tls_get_addr@GOT(%reg)
4407 which may be converted to
4408 addr32 call ___tls_get_addr
4409 into:
4410 movl %gs:0, %eax
4411 leal 0(%esi), %esi */
4412 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4413 if (*(contents + rel->r_offset + 4) == 0xff
4414 || *(contents + rel->r_offset + 4) == 0x67)
4415 memcpy (contents + rel->r_offset - 2,
4416 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
4417 else
4418 memcpy (contents + rel->r_offset - 2,
4419 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4420 /* Skip R_386_PC32/R_386_PLT32. */
4421 rel++;
4422 wrel++;
4423 continue;
4424 }
4425
4426 if (htab->elf.sgot == NULL)
4427 abort ();
4428
4429 off = htab->tls_ld_or_ldm_got.offset;
4430 if (off & 1)
4431 off &= ~1;
4432 else
4433 {
4434 Elf_Internal_Rela outrel;
4435
4436 if (htab->elf.srelgot == NULL)
4437 abort ();
4438
4439 outrel.r_offset = (htab->elf.sgot->output_section->vma
4440 + htab->elf.sgot->output_offset + off);
4441
4442 bfd_put_32 (output_bfd, 0,
4443 htab->elf.sgot->contents + off);
4444 bfd_put_32 (output_bfd, 0,
4445 htab->elf.sgot->contents + off + 4);
4446 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4447 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4448 htab->tls_ld_or_ldm_got.offset |= 1;
4449 }
4450 relocation = htab->elf.sgot->output_section->vma
4451 + htab->elf.sgot->output_offset + off
4452 - htab->elf.sgotplt->output_section->vma
4453 - htab->elf.sgotplt->output_offset;
4454 unresolved_reloc = FALSE;
4455 break;
4456
4457 case R_386_TLS_LDO_32:
4458 if (!bfd_link_executable (info)
4459 || (input_section->flags & SEC_CODE) == 0)
4460 relocation -= _bfd_x86_elf_dtpoff_base (info);
4461 else
4462 /* When converting LDO to LE, we must negate. */
4463 relocation = -elf_i386_tpoff (info, relocation);
4464 break;
4465
4466 case R_386_TLS_LE_32:
4467 case R_386_TLS_LE:
4468 if (!bfd_link_executable (info))
4469 {
4470 Elf_Internal_Rela outrel;
4471 asection *sreloc;
4472
4473 outrel.r_offset = rel->r_offset
4474 + input_section->output_section->vma
4475 + input_section->output_offset;
4476 if (h != NULL && h->dynindx != -1)
4477 indx = h->dynindx;
4478 else
4479 indx = 0;
4480 if (r_type == R_386_TLS_LE_32)
4481 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4482 else
4483 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4484 sreloc = elf_section_data (input_section)->sreloc;
4485 if (sreloc == NULL)
4486 abort ();
4487 elf_append_rel (output_bfd, sreloc, &outrel);
4488 if (indx)
4489 continue;
4490 else if (r_type == R_386_TLS_LE_32)
4491 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
4492 else
4493 relocation -= _bfd_x86_elf_dtpoff_base (info);
4494 }
4495 else if (r_type == R_386_TLS_LE_32)
4496 relocation = elf_i386_tpoff (info, relocation);
4497 else
4498 relocation = -elf_i386_tpoff (info, relocation);
4499 break;
4500
4501 default:
4502 break;
4503 }
4504
4505 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4506 because such sections are not SEC_ALLOC and thus ld.so will
4507 not process them. */
4508 if (unresolved_reloc
4509 && !((input_section->flags & SEC_DEBUGGING) != 0
4510 && h->def_dynamic)
4511 && _bfd_elf_section_offset (output_bfd, info, input_section,
4512 rel->r_offset) != (bfd_vma) -1)
4513 {
4514 _bfd_error_handler
4515 /* xgettext:c-format */
4516 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
4517 input_bfd,
4518 input_section,
4519 rel->r_offset,
4520 howto->name,
4521 h->root.root.string);
4522 return FALSE;
4523 }
4524
4525 do_relocation:
4526 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4527 contents, rel->r_offset,
4528 relocation, 0);
4529
4530 check_relocation_error:
4531 if (r != bfd_reloc_ok)
4532 {
4533 const char *name;
4534
4535 if (h != NULL)
4536 name = h->root.root.string;
4537 else
4538 {
4539 name = bfd_elf_string_from_elf_section (input_bfd,
4540 symtab_hdr->sh_link,
4541 sym->st_name);
4542 if (name == NULL)
4543 return FALSE;
4544 if (*name == '\0')
4545 name = bfd_section_name (input_bfd, sec);
4546 }
4547
4548 if (r == bfd_reloc_overflow)
4549 (*info->callbacks->reloc_overflow)
4550 (info, (h ? &h->root : NULL), name, howto->name,
4551 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4552 else
4553 {
4554 _bfd_error_handler
4555 /* xgettext:c-format */
4556 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
4557 input_bfd, input_section,
4558 rel->r_offset, name, (int) r);
4559 return FALSE;
4560 }
4561 }
4562
4563 if (wrel != rel)
4564 *wrel = *rel;
4565 }
4566
4567 if (wrel != rel)
4568 {
4569 Elf_Internal_Shdr *rel_hdr;
4570 size_t deleted = rel - wrel;
4571
4572 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4573 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4574 if (rel_hdr->sh_size == 0)
4575 {
4576 /* It is too late to remove an empty reloc section. Leave
4577 one NONE reloc.
4578 ??? What is wrong with an empty section??? */
4579 rel_hdr->sh_size = rel_hdr->sh_entsize;
4580 deleted -= 1;
4581 }
4582 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4583 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4584 input_section->reloc_count -= deleted;
4585 }
4586
4587 return TRUE;
4588 }
4589
4590 /* Finish up dynamic symbol handling. We set the contents of various
4591 dynamic sections here. */
4592
4593 static bfd_boolean
4594 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4595 struct bfd_link_info *info,
4596 struct elf_link_hash_entry *h,
4597 Elf_Internal_Sym *sym)
4598 {
4599 struct elf_x86_link_hash_table *htab;
4600 unsigned plt_entry_size;
4601 const struct elf_i386_backend_data *abed;
4602 struct elf_x86_link_hash_entry *eh;
4603 bfd_boolean local_undefweak;
4604 bfd_boolean use_plt_second;
4605
4606 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4607 if (htab == NULL)
4608 return FALSE;
4609
4610 abed = get_elf_i386_backend_data (output_bfd);
4611 plt_entry_size = htab->plt.plt_entry_size;
4612
4613 /* Use the second PLT section only if there is .plt section. */
4614 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4615
4616 eh = (struct elf_x86_link_hash_entry *) h;
4617 if (eh->no_finish_dynamic_symbol)
4618 abort ();
4619
4620 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4621 resolved undefined weak symbols in executable so that their
4622 references have value 0 at run-time. */
4623 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, I386_ELF_DATA,
4624 eh->has_got_reloc,
4625 eh);
4626
4627 if (h->plt.offset != (bfd_vma) -1)
4628 {
4629 bfd_vma plt_index, plt_offset;
4630 bfd_vma got_offset;
4631 Elf_Internal_Rela rel;
4632 bfd_byte *loc;
4633 asection *plt, *resolved_plt, *gotplt, *relplt;
4634
4635 /* When building a static executable, use .iplt, .igot.plt and
4636 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4637 if (htab->elf.splt != NULL)
4638 {
4639 plt = htab->elf.splt;
4640 gotplt = htab->elf.sgotplt;
4641 relplt = htab->elf.srelplt;
4642 }
4643 else
4644 {
4645 plt = htab->elf.iplt;
4646 gotplt = htab->elf.igotplt;
4647 relplt = htab->elf.irelplt;
4648 }
4649
4650 /* This symbol has an entry in the procedure linkage table. Set
4651 it up. */
4652
4653 if ((h->dynindx == -1
4654 && !local_undefweak
4655 && !((h->forced_local || bfd_link_executable (info))
4656 && h->def_regular
4657 && h->type == STT_GNU_IFUNC))
4658 || plt == NULL
4659 || gotplt == NULL
4660 || relplt == NULL)
4661 abort ();
4662
4663 /* Get the index in the procedure linkage table which
4664 corresponds to this symbol. This is the index of this symbol
4665 in all the symbols for which we are making plt entries. The
4666 first entry in the procedure linkage table is reserved.
4667
4668 Get the offset into the .got table of the entry that
4669 corresponds to this function. Each .got entry is 4 bytes.
4670 The first three are reserved.
4671
4672 For static executables, we don't reserve anything. */
4673
4674 if (plt == htab->elf.splt)
4675 {
4676 got_offset = (h->plt.offset / plt_entry_size
4677 - htab->plt.has_plt0);
4678 got_offset = (got_offset + 3) * 4;
4679 }
4680 else
4681 {
4682 got_offset = h->plt.offset / plt_entry_size;
4683 got_offset = got_offset * 4;
4684 }
4685
4686 /* Fill in the entry in the procedure linkage table and update
4687 the first slot. */
4688 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
4689 plt_entry_size);
4690
4691 if (use_plt_second)
4692 {
4693 const bfd_byte *plt_entry;
4694 if (bfd_link_pic (info))
4695 plt_entry = htab->non_lazy_plt->pic_plt_entry;
4696 else
4697 plt_entry = htab->non_lazy_plt->plt_entry;
4698 memcpy (htab->plt_second->contents + eh->plt_second.offset,
4699 plt_entry, htab->non_lazy_plt->plt_entry_size);
4700
4701 resolved_plt = htab->plt_second;
4702 plt_offset = eh->plt_second.offset;
4703 }
4704 else
4705 {
4706 resolved_plt = plt;
4707 plt_offset = h->plt.offset;
4708 }
4709
4710 if (! bfd_link_pic (info))
4711 {
4712 bfd_put_32 (output_bfd,
4713 (gotplt->output_section->vma
4714 + gotplt->output_offset
4715 + got_offset),
4716 resolved_plt->contents + plt_offset
4717 + htab->plt.plt_got_offset);
4718
4719 if (abed->os == is_vxworks)
4720 {
4721 int s, k, reloc_index;
4722
4723 /* Create the R_386_32 relocation referencing the GOT
4724 for this PLT entry. */
4725
4726 /* S: Current slot number (zero-based). */
4727 s = ((h->plt.offset - htab->plt.plt_entry_size)
4728 / htab->plt.plt_entry_size);
4729 /* K: Number of relocations for PLTResolve. */
4730 if (bfd_link_pic (info))
4731 k = PLTRESOLVE_RELOCS_SHLIB;
4732 else
4733 k = PLTRESOLVE_RELOCS;
4734 /* Skip the PLTresolve relocations, and the relocations for
4735 the other PLT slots. */
4736 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4737 loc = (htab->srelplt2->contents + reloc_index
4738 * sizeof (Elf32_External_Rel));
4739
4740 rel.r_offset = (plt->output_section->vma
4741 + plt->output_offset
4742 + h->plt.offset + 2),
4743 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4744 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4745
4746 /* Create the R_386_32 relocation referencing the beginning of
4747 the PLT for this GOT entry. */
4748 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4749 + htab->elf.sgotplt->output_offset
4750 + got_offset);
4751 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4752 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4753 loc + sizeof (Elf32_External_Rel));
4754 }
4755 }
4756 else
4757 {
4758 bfd_put_32 (output_bfd, got_offset,
4759 resolved_plt->contents + plt_offset
4760 + htab->plt.plt_got_offset);
4761 }
4762
4763 /* Fill in the entry in the global offset table. Leave the entry
4764 as zero for undefined weak symbol in PIE. No PLT relocation
4765 against undefined weak symbol in PIE. */
4766 if (!local_undefweak)
4767 {
4768 if (htab->plt.has_plt0)
4769 bfd_put_32 (output_bfd,
4770 (plt->output_section->vma
4771 + plt->output_offset
4772 + h->plt.offset
4773 + htab->lazy_plt->plt_lazy_offset),
4774 gotplt->contents + got_offset);
4775
4776 /* Fill in the entry in the .rel.plt section. */
4777 rel.r_offset = (gotplt->output_section->vma
4778 + gotplt->output_offset
4779 + got_offset);
4780 if (h->dynindx == -1
4781 || ((bfd_link_executable (info)
4782 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4783 && h->def_regular
4784 && h->type == STT_GNU_IFUNC))
4785 {
4786 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4787 h->root.root.string,
4788 h->root.u.def.section->owner);
4789
4790 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4791 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4792 in the .got.plt section. */
4793 bfd_put_32 (output_bfd,
4794 (h->root.u.def.value
4795 + h->root.u.def.section->output_section->vma
4796 + h->root.u.def.section->output_offset),
4797 gotplt->contents + got_offset);
4798 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4799 /* R_386_IRELATIVE comes last. */
4800 plt_index = htab->next_irelative_index--;
4801 }
4802 else
4803 {
4804 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4805 plt_index = htab->next_jump_slot_index++;
4806 }
4807
4808 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4809 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4810
4811 /* Don't fill the second and third slots in PLT entry for
4812 static executables nor without PLT0. */
4813 if (plt == htab->elf.splt && htab->plt.has_plt0)
4814 {
4815 bfd_put_32 (output_bfd,
4816 plt_index * sizeof (Elf32_External_Rel),
4817 plt->contents + h->plt.offset
4818 + htab->lazy_plt->plt_reloc_offset);
4819 bfd_put_32 (output_bfd,
4820 - (h->plt.offset
4821 + htab->lazy_plt->plt_plt_offset + 4),
4822 (plt->contents + h->plt.offset
4823 + htab->lazy_plt->plt_plt_offset));
4824 }
4825 }
4826 }
4827 else if (eh->plt_got.offset != (bfd_vma) -1)
4828 {
4829 bfd_vma got_offset, plt_offset;
4830 asection *plt, *got, *gotplt;
4831 const bfd_byte *got_plt_entry;
4832
4833 /* Set the entry in the GOT procedure linkage table. */
4834 plt = htab->plt_got;
4835 got = htab->elf.sgot;
4836 gotplt = htab->elf.sgotplt;
4837 got_offset = h->got.offset;
4838
4839 if (got_offset == (bfd_vma) -1
4840 || plt == NULL
4841 || got == NULL
4842 || gotplt == NULL)
4843 abort ();
4844
4845 /* Fill in the entry in the GOT procedure linkage table. */
4846 if (! bfd_link_pic (info))
4847 {
4848 got_plt_entry = htab->non_lazy_plt->plt_entry;
4849 got_offset += got->output_section->vma + got->output_offset;
4850 }
4851 else
4852 {
4853 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
4854 got_offset += (got->output_section->vma
4855 + got->output_offset
4856 - gotplt->output_section->vma
4857 - gotplt->output_offset);
4858 }
4859
4860 plt_offset = eh->plt_got.offset;
4861 memcpy (plt->contents + plt_offset, got_plt_entry,
4862 htab->non_lazy_plt->plt_entry_size);
4863 bfd_put_32 (output_bfd, got_offset,
4864 (plt->contents + plt_offset
4865 + htab->non_lazy_plt->plt_got_offset));
4866 }
4867
4868 if (!local_undefweak
4869 && !h->def_regular
4870 && (h->plt.offset != (bfd_vma) -1
4871 || eh->plt_got.offset != (bfd_vma) -1))
4872 {
4873 /* Mark the symbol as undefined, rather than as defined in
4874 the .plt section. Leave the value if there were any
4875 relocations where pointer equality matters (this is a clue
4876 for the dynamic linker, to make function pointer
4877 comparisons work between an application and shared
4878 library), otherwise set it to zero. If a function is only
4879 called from a binary, there is no need to slow down
4880 shared libraries because of that. */
4881 sym->st_shndx = SHN_UNDEF;
4882 if (!h->pointer_equality_needed)
4883 sym->st_value = 0;
4884 }
4885
4886 /* Don't generate dynamic GOT relocation against undefined weak
4887 symbol in executable. */
4888 if (h->got.offset != (bfd_vma) -1
4889 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
4890 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
4891 && !local_undefweak)
4892 {
4893 Elf_Internal_Rela rel;
4894 asection *relgot = htab->elf.srelgot;
4895
4896 /* This symbol has an entry in the global offset table. Set it
4897 up. */
4898
4899 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4900 abort ();
4901
4902 rel.r_offset = (htab->elf.sgot->output_section->vma
4903 + htab->elf.sgot->output_offset
4904 + (h->got.offset & ~(bfd_vma) 1));
4905
4906 /* If this is a static link, or it is a -Bsymbolic link and the
4907 symbol is defined locally or was forced to be local because
4908 of a version file, we just want to emit a RELATIVE reloc.
4909 The entry in the global offset table will already have been
4910 initialized in the relocate_section function. */
4911 if (h->def_regular
4912 && h->type == STT_GNU_IFUNC)
4913 {
4914 if (h->plt.offset == (bfd_vma) -1)
4915 {
4916 /* STT_GNU_IFUNC is referenced without PLT. */
4917 if (htab->elf.splt == NULL)
4918 {
4919 /* use .rel[a].iplt section to store .got relocations
4920 in static executable. */
4921 relgot = htab->elf.irelplt;
4922 }
4923 if (SYMBOL_REFERENCES_LOCAL (info, h))
4924 {
4925 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4926 h->root.root.string,
4927 h->root.u.def.section->owner);
4928
4929 bfd_put_32 (output_bfd,
4930 (h->root.u.def.value
4931 + h->root.u.def.section->output_section->vma
4932 + h->root.u.def.section->output_offset),
4933 htab->elf.sgot->contents + h->got.offset);
4934 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4935 }
4936 else
4937 goto do_glob_dat;
4938 }
4939 else if (bfd_link_pic (info))
4940 {
4941 /* Generate R_386_GLOB_DAT. */
4942 goto do_glob_dat;
4943 }
4944 else
4945 {
4946 asection *plt;
4947 bfd_vma plt_offset;
4948
4949 if (!h->pointer_equality_needed)
4950 abort ();
4951
4952 /* For non-shared object, we can't use .got.plt, which
4953 contains the real function addres if we need pointer
4954 equality. We load the GOT entry with the PLT entry. */
4955 if (htab->plt_second != NULL)
4956 {
4957 plt = htab->plt_second;
4958 plt_offset = eh->plt_second.offset;
4959 }
4960 else
4961 {
4962 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4963 plt_offset = h->plt.offset;
4964 }
4965 bfd_put_32 (output_bfd,
4966 (plt->output_section->vma
4967 + plt->output_offset + plt_offset),
4968 htab->elf.sgot->contents + h->got.offset);
4969 return TRUE;
4970 }
4971 }
4972 else if (bfd_link_pic (info)
4973 && SYMBOL_REFERENCES_LOCAL (info, h))
4974 {
4975 BFD_ASSERT((h->got.offset & 1) != 0);
4976 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4977 }
4978 else
4979 {
4980 BFD_ASSERT((h->got.offset & 1) == 0);
4981 do_glob_dat:
4982 bfd_put_32 (output_bfd, (bfd_vma) 0,
4983 htab->elf.sgot->contents + h->got.offset);
4984 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4985 }
4986
4987 elf_append_rel (output_bfd, relgot, &rel);
4988 }
4989
4990 if (h->needs_copy)
4991 {
4992 Elf_Internal_Rela rel;
4993 asection *s;
4994
4995 /* This symbol needs a copy reloc. Set it up. */
4996
4997 if (h->dynindx == -1
4998 || (h->root.type != bfd_link_hash_defined
4999 && h->root.type != bfd_link_hash_defweak)
5000 || htab->elf.srelbss == NULL
5001 || htab->elf.sreldynrelro == NULL)
5002 abort ();
5003
5004 rel.r_offset = (h->root.u.def.value
5005 + h->root.u.def.section->output_section->vma
5006 + h->root.u.def.section->output_offset);
5007 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
5008 if (h->root.u.def.section == htab->elf.sdynrelro)
5009 s = htab->elf.sreldynrelro;
5010 else
5011 s = htab->elf.srelbss;
5012 elf_append_rel (output_bfd, s, &rel);
5013 }
5014
5015 return TRUE;
5016 }
5017
5018 /* Finish up local dynamic symbol handling. We set the contents of
5019 various dynamic sections here. */
5020
5021 static bfd_boolean
5022 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5023 {
5024 struct elf_link_hash_entry *h
5025 = (struct elf_link_hash_entry *) *slot;
5026 struct bfd_link_info *info
5027 = (struct bfd_link_info *) inf;
5028
5029 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5030 h, NULL);
5031 }
5032
5033 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5034 here since undefined weak symbol may not be dynamic and may not be
5035 called for elf_i386_finish_dynamic_symbol. */
5036
5037 static bfd_boolean
5038 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5039 void *inf)
5040 {
5041 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5042 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5043
5044 if (h->root.type != bfd_link_hash_undefweak
5045 || h->dynindx != -1)
5046 return TRUE;
5047
5048 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5049 info, h, NULL);
5050 }
5051
5052 /* Used to decide how to sort relocs in an optimal manner for the
5053 dynamic linker, before writing them out. */
5054
5055 static enum elf_reloc_type_class
5056 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5057 const asection *rel_sec ATTRIBUTE_UNUSED,
5058 const Elf_Internal_Rela *rela)
5059 {
5060 bfd *abfd = info->output_bfd;
5061 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5062 struct elf_link_hash_table *htab = elf_hash_table (info);
5063
5064 if (htab->dynsym != NULL
5065 && htab->dynsym->contents != NULL)
5066 {
5067 /* Check relocation against STT_GNU_IFUNC symbol if there are
5068 dynamic symbols. */
5069 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5070 if (r_symndx != STN_UNDEF)
5071 {
5072 Elf_Internal_Sym sym;
5073 if (!bed->s->swap_symbol_in (abfd,
5074 (htab->dynsym->contents
5075 + r_symndx * sizeof (Elf32_External_Sym)),
5076 0, &sym))
5077 abort ();
5078
5079 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5080 return reloc_class_ifunc;
5081 }
5082 }
5083
5084 switch (ELF32_R_TYPE (rela->r_info))
5085 {
5086 case R_386_IRELATIVE:
5087 return reloc_class_ifunc;
5088 case R_386_RELATIVE:
5089 return reloc_class_relative;
5090 case R_386_JUMP_SLOT:
5091 return reloc_class_plt;
5092 case R_386_COPY:
5093 return reloc_class_copy;
5094 default:
5095 return reloc_class_normal;
5096 }
5097 }
5098
5099 /* Finish up the dynamic sections. */
5100
5101 static bfd_boolean
5102 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5103 struct bfd_link_info *info)
5104 {
5105 struct elf_x86_link_hash_table *htab;
5106 bfd *dynobj;
5107 asection *sdyn;
5108 const struct elf_i386_backend_data *abed;
5109
5110 htab = elf_x86_hash_table (info, I386_ELF_DATA);
5111 if (htab == NULL)
5112 return FALSE;
5113
5114 dynobj = htab->elf.dynobj;
5115 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5116 abed = get_elf_i386_backend_data (output_bfd);
5117
5118 if (htab->elf.dynamic_sections_created)
5119 {
5120 Elf32_External_Dyn *dyncon, *dynconend;
5121
5122 if (sdyn == NULL || htab->elf.sgot == NULL)
5123 abort ();
5124
5125 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5126 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5127 for (; dyncon < dynconend; dyncon++)
5128 {
5129 Elf_Internal_Dyn dyn;
5130 asection *s;
5131
5132 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5133
5134 switch (dyn.d_tag)
5135 {
5136 default:
5137 if (abed->os == is_vxworks
5138 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5139 break;
5140 continue;
5141
5142 case DT_PLTGOT:
5143 s = htab->elf.sgotplt;
5144 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5145 break;
5146
5147 case DT_JMPREL:
5148 s = htab->elf.srelplt;
5149 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5150 break;
5151
5152 case DT_PLTRELSZ:
5153 s = htab->elf.srelplt;
5154 dyn.d_un.d_val = s->size;
5155 break;
5156 }
5157
5158 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5159 }
5160
5161 if (htab->elf.splt && htab->elf.splt->size > 0)
5162 {
5163 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5164 really seem like the right value. */
5165 elf_section_data (htab->elf.splt->output_section)
5166 ->this_hdr.sh_entsize = 4;
5167
5168 if (htab->plt.has_plt0)
5169 {
5170 /* Fill in the special first entry in the procedure linkage
5171 table. */
5172 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
5173 htab->lazy_plt->plt0_entry_size);
5174 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
5175 abed->plt0_pad_byte,
5176 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
5177 if (!bfd_link_pic (info))
5178 {
5179 bfd_put_32 (output_bfd,
5180 (htab->elf.sgotplt->output_section->vma
5181 + htab->elf.sgotplt->output_offset
5182 + 4),
5183 htab->elf.splt->contents
5184 + htab->lazy_plt->plt0_got1_offset);
5185 bfd_put_32 (output_bfd,
5186 (htab->elf.sgotplt->output_section->vma
5187 + htab->elf.sgotplt->output_offset
5188 + 8),
5189 htab->elf.splt->contents
5190 + htab->lazy_plt->plt0_got2_offset);
5191
5192 if (abed->os == is_vxworks)
5193 {
5194 Elf_Internal_Rela rel;
5195 int num_plts = (htab->elf.splt->size
5196 / htab->plt.plt_entry_size) - 1;
5197 unsigned char *p;
5198 asection *srelplt2 = htab->srelplt2;
5199
5200 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5201 + 4. On IA32 we use REL relocations so the
5202 addend goes in the PLT directly. */
5203 rel.r_offset = (htab->elf.splt->output_section->vma
5204 + htab->elf.splt->output_offset
5205 + htab->lazy_plt->plt0_got1_offset);
5206 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5207 R_386_32);
5208 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5209 srelplt2->contents);
5210 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5211 + 8. */
5212 rel.r_offset = (htab->elf.splt->output_section->vma
5213 + htab->elf.splt->output_offset
5214 + htab->lazy_plt->plt0_got2_offset);
5215 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5216 R_386_32);
5217 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5218 srelplt2->contents +
5219 sizeof (Elf32_External_Rel));
5220 /* Correct the .rel.plt.unloaded relocations. */
5221 p = srelplt2->contents;
5222 if (bfd_link_pic (info))
5223 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5224 else
5225 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5226
5227 for (; num_plts; num_plts--)
5228 {
5229 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5230 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5231 R_386_32);
5232 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5233 p += sizeof (Elf32_External_Rel);
5234
5235 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5236 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
5237 R_386_32);
5238 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5239 p += sizeof (Elf32_External_Rel);
5240 }
5241 }
5242 }
5243 }
5244 }
5245
5246 if (htab->plt_got != NULL && htab->plt_got->size > 0)
5247 elf_section_data (htab->plt_got->output_section)
5248 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5249
5250 if (htab->plt_second != NULL && htab->plt_second->size > 0)
5251 elf_section_data (htab->plt_second->output_section)
5252 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5253 }
5254
5255 /* Fill in the first three entries in the global offset table. */
5256 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
5257 {
5258 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5259 {
5260 _bfd_error_handler
5261 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5262 return FALSE;
5263 }
5264
5265 bfd_put_32 (output_bfd,
5266 (sdyn == NULL ? 0
5267 : sdyn->output_section->vma + sdyn->output_offset),
5268 htab->elf.sgotplt->contents);
5269 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5270 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5271
5272 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5273 }
5274
5275 /* Adjust .eh_frame for .plt section. */
5276 if (htab->plt_eh_frame != NULL
5277 && htab->plt_eh_frame->contents != NULL)
5278 {
5279 if (htab->elf.splt != NULL
5280 && htab->elf.splt->size != 0
5281 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5282 && htab->elf.splt->output_section != NULL
5283 && htab->plt_eh_frame->output_section != NULL)
5284 {
5285 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5286 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5287 + htab->plt_eh_frame->output_offset
5288 + PLT_FDE_START_OFFSET;
5289 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5290 htab->plt_eh_frame->contents
5291 + PLT_FDE_START_OFFSET);
5292 }
5293 if (htab->plt_eh_frame->sec_info_type
5294 == SEC_INFO_TYPE_EH_FRAME)
5295 {
5296 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5297 htab->plt_eh_frame,
5298 htab->plt_eh_frame->contents))
5299 return FALSE;
5300 }
5301 }
5302
5303 /* Adjust .eh_frame for .plt.got section. */
5304 if (htab->plt_got_eh_frame != NULL
5305 && htab->plt_got_eh_frame->contents != NULL)
5306 {
5307 if (htab->plt_got != NULL
5308 && htab->plt_got->size != 0
5309 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5310 && htab->plt_got->output_section != NULL
5311 && htab->plt_got_eh_frame->output_section != NULL)
5312 {
5313 bfd_vma plt_start = htab->plt_got->output_section->vma;
5314 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5315 + htab->plt_got_eh_frame->output_offset
5316 + PLT_FDE_START_OFFSET;
5317 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5318 htab->plt_got_eh_frame->contents
5319 + PLT_FDE_START_OFFSET);
5320 }
5321 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5322 {
5323 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5324 htab->plt_got_eh_frame,
5325 htab->plt_got_eh_frame->contents))
5326 return FALSE;
5327 }
5328 }
5329
5330 /* Adjust .eh_frame for the second PLT section. */
5331 if (htab->plt_second_eh_frame != NULL
5332 && htab->plt_second_eh_frame->contents != NULL)
5333 {
5334 if (htab->plt_second != NULL
5335 && htab->plt_second->size != 0
5336 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
5337 && htab->plt_second->output_section != NULL
5338 && htab->plt_second_eh_frame->output_section != NULL)
5339 {
5340 bfd_vma plt_start = htab->plt_second->output_section->vma;
5341 bfd_vma eh_frame_start
5342 = (htab->plt_second_eh_frame->output_section->vma
5343 + htab->plt_second_eh_frame->output_offset
5344 + PLT_FDE_START_OFFSET);
5345 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5346 htab->plt_second_eh_frame->contents
5347 + PLT_FDE_START_OFFSET);
5348 }
5349 if (htab->plt_second_eh_frame->sec_info_type
5350 == SEC_INFO_TYPE_EH_FRAME)
5351 {
5352 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5353 htab->plt_second_eh_frame,
5354 htab->plt_second_eh_frame->contents))
5355 return FALSE;
5356 }
5357 }
5358
5359 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5360 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5361
5362 /* Fill PLT entries for undefined weak symbols in PIE. */
5363 if (bfd_link_pie (info))
5364 bfd_hash_traverse (&info->hash->table,
5365 elf_i386_pie_finish_undefweak_symbol,
5366 info);
5367
5368 return TRUE;
5369 }
5370
5371 /* Fill PLT/GOT entries and allocate dynamic relocations for local
5372 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5373 It has to be done before elf_link_sort_relocs is called so that
5374 dynamic relocations are properly sorted. */
5375
5376 static bfd_boolean
5377 elf_i386_output_arch_local_syms
5378 (bfd *output_bfd ATTRIBUTE_UNUSED,
5379 struct bfd_link_info *info,
5380 void *flaginfo ATTRIBUTE_UNUSED,
5381 int (*func) (void *, const char *,
5382 Elf_Internal_Sym *,
5383 asection *,
5384 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5385 {
5386 struct elf_x86_link_hash_table *htab
5387 = elf_x86_hash_table (info, I386_ELF_DATA);
5388 if (htab == NULL)
5389 return FALSE;
5390
5391 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5392 htab_traverse (htab->loc_hash_table,
5393 elf_i386_finish_local_dynamic_symbol,
5394 info);
5395
5396 return TRUE;
5397 }
5398
5399 /* Forward declaration. */
5400 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
5401
5402 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
5403 dynamic relocations. */
5404
5405 static long
5406 elf_i386_get_synthetic_symtab (bfd *abfd,
5407 long symcount ATTRIBUTE_UNUSED,
5408 asymbol **syms ATTRIBUTE_UNUSED,
5409 long dynsymcount,
5410 asymbol **dynsyms,
5411 asymbol **ret)
5412 {
5413 long count, i, n;
5414 int j;
5415 bfd_byte *plt_contents;
5416 long relsize;
5417 const struct elf_x86_lazy_plt_layout *lazy_plt;
5418 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
5419 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
5420 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
5421 asection *plt;
5422 bfd_vma got_addr;
5423 enum elf_x86_plt_type plt_type;
5424 struct elf_x86_plt plts[] =
5425 {
5426 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
5427 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
5428 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
5429 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
5430 };
5431
5432 *ret = NULL;
5433
5434 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5435 return 0;
5436
5437 if (dynsymcount <= 0)
5438 return 0;
5439
5440 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
5441 if (relsize <= 0)
5442 return -1;
5443
5444 non_lazy_plt = NULL;
5445 /* Silence GCC 6. */
5446 lazy_plt = NULL;
5447 non_lazy_ibt_plt = NULL;
5448 lazy_ibt_plt = NULL;
5449 switch (get_elf_i386_backend_data (abfd)->os)
5450 {
5451 case is_normal:
5452 non_lazy_plt = &elf_i386_non_lazy_plt;
5453 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5454 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5455 /* Fall through */
5456 case is_vxworks:
5457 lazy_plt = &elf_i386_lazy_plt;
5458 break;
5459 case is_nacl:
5460 lazy_plt = &elf_i386_nacl_plt;
5461 break;
5462 }
5463
5464 got_addr = 0;
5465
5466 count = 0;
5467 for (j = 0; plts[j].name != NULL; j++)
5468 {
5469 plt = bfd_get_section_by_name (abfd, plts[j].name);
5470 if (plt == NULL || plt->size == 0)
5471 continue;
5472
5473 /* Get the PLT section contents. */
5474 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5475 if (plt_contents == NULL)
5476 break;
5477 if (!bfd_get_section_contents (abfd, (asection *) plt,
5478 plt_contents, 0, plt->size))
5479 {
5480 free (plt_contents);
5481 break;
5482 }
5483
5484 /* Check what kind of PLT it is. */
5485 plt_type = plt_unknown;
5486 if (plts[j].type == plt_unknown
5487 && (plt->size >= (lazy_plt->plt0_entry_size
5488 + lazy_plt->plt_entry_size)))
5489 {
5490 /* Match lazy PLT first. */
5491 if (memcmp (plt_contents, lazy_plt->plt0_entry,
5492 lazy_plt->plt0_got1_offset) == 0)
5493 {
5494 /* The fist entry in the lazy IBT PLT is the same as the
5495 normal lazy PLT. */
5496 if (lazy_ibt_plt != NULL
5497 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5498 lazy_ibt_plt->plt_entry,
5499 lazy_ibt_plt->plt_got_offset) == 0))
5500 plt_type = plt_lazy | plt_second;
5501 else
5502 plt_type = plt_lazy;
5503 }
5504 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
5505 lazy_plt->plt0_got1_offset) == 0)
5506 {
5507 /* The fist entry in the PIC lazy IBT PLT is the same as
5508 the normal PIC lazy PLT. */
5509 if (lazy_ibt_plt != NULL
5510 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5511 lazy_ibt_plt->pic_plt_entry,
5512 lazy_ibt_plt->plt_got_offset) == 0))
5513 plt_type = plt_lazy | plt_pic | plt_second;
5514 else
5515 plt_type = plt_lazy | plt_pic;
5516 }
5517 }
5518
5519 if (non_lazy_plt != NULL
5520 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5521 && plt->size >= non_lazy_plt->plt_entry_size)
5522 {
5523 /* Match non-lazy PLT. */
5524 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5525 non_lazy_plt->plt_got_offset) == 0)
5526 plt_type = plt_non_lazy;
5527 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
5528 non_lazy_plt->plt_got_offset) == 0)
5529 plt_type = plt_pic;
5530 }
5531
5532 if ((non_lazy_ibt_plt != NULL)
5533 && (plt_type == plt_unknown || plt_type == plt_second)
5534 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
5535 {
5536 if (memcmp (plt_contents,
5537 non_lazy_ibt_plt->plt_entry,
5538 non_lazy_ibt_plt->plt_got_offset) == 0)
5539 {
5540 /* Match IBT PLT. */
5541 plt_type = plt_second;
5542 non_lazy_plt = non_lazy_ibt_plt;
5543 }
5544 else if (memcmp (plt_contents,
5545 non_lazy_ibt_plt->pic_plt_entry,
5546 non_lazy_ibt_plt->plt_got_offset) == 0)
5547 {
5548 /* Match PIC IBT PLT. */
5549 plt_type = plt_second | plt_pic;
5550 non_lazy_plt = non_lazy_ibt_plt;
5551 }
5552 }
5553
5554 if (plt_type == plt_unknown)
5555 {
5556 free (plt_contents);
5557 continue;
5558 }
5559
5560 plts[j].sec = plt;
5561 plts[j].type = plt_type;
5562
5563 if ((plt_type & plt_lazy))
5564 {
5565 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5566 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5567 /* Skip PLT0 in lazy PLT. */
5568 i = 1;
5569 }
5570 else
5571 {
5572 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5573 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5574 i = 0;
5575 }
5576
5577 /* Skip lazy PLT when the second PLT is used. */
5578 if ((plt_type & (plt_lazy | plt_second))
5579 == (plt_lazy | plt_second))
5580 plts[j].count = 0;
5581 else
5582 {
5583 n = plt->size / plts[j].plt_entry_size;
5584 plts[j].count = n;
5585 count += n - i;
5586 }
5587
5588 plts[j].contents = plt_contents;
5589
5590 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
5591 if ((plt_type & plt_pic))
5592 got_addr = (bfd_vma) -1;
5593 }
5594
5595 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5596 got_addr, plts, dynsyms,
5597 ret);
5598 }
5599
5600 /* Set up i386 GNU properties. Return the first relocatable ELF input
5601 with GNU properties if found. Otherwise, return NULL. */
5602
5603 static bfd *
5604 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
5605 {
5606 struct elf_x86_plt_layout_table plt_layout;
5607
5608 plt_layout.normal_target = FALSE;
5609 plt_layout.is_vxworks = FALSE;
5610 switch (get_elf_i386_backend_data (info->output_bfd)->os)
5611 {
5612 case is_normal:
5613 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5614 plt_layout.non_lazy_plt = &elf_i386_non_lazy_plt;
5615 plt_layout.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5616 plt_layout.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5617 plt_layout.normal_target = TRUE;
5618 break;
5619 case is_vxworks:
5620 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5621 plt_layout.non_lazy_plt = NULL;
5622 plt_layout.lazy_ibt_plt = NULL;
5623 plt_layout.non_lazy_ibt_plt = NULL;
5624 plt_layout.is_vxworks = TRUE;
5625 break;
5626 case is_nacl:
5627 plt_layout.lazy_plt = &elf_i386_nacl_plt;
5628 plt_layout.non_lazy_plt = NULL;
5629 plt_layout.lazy_ibt_plt = NULL;
5630 plt_layout.non_lazy_ibt_plt = NULL;
5631 break;
5632 }
5633
5634 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
5635 }
5636
5637 #define TARGET_LITTLE_SYM i386_elf32_vec
5638 #define TARGET_LITTLE_NAME "elf32-i386"
5639 #define ELF_ARCH bfd_arch_i386
5640 #define ELF_TARGET_ID I386_ELF_DATA
5641 #define ELF_MACHINE_CODE EM_386
5642 #define ELF_MAXPAGESIZE 0x1000
5643
5644 #define elf_backend_can_gc_sections 1
5645 #define elf_backend_can_refcount 1
5646 #define elf_backend_want_got_plt 1
5647 #define elf_backend_plt_readonly 1
5648 #define elf_backend_want_plt_sym 0
5649 #define elf_backend_got_header_size 12
5650 #define elf_backend_plt_alignment 4
5651 #define elf_backend_dtrel_excludes_plt 1
5652 #define elf_backend_extern_protected_data 1
5653 #define elf_backend_caches_rawsize 1
5654 #define elf_backend_want_dynrelro 1
5655
5656 /* Support RELA for objdump of prelink objects. */
5657 #define elf_info_to_howto elf_i386_info_to_howto_rel
5658 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5659
5660 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5661 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5662 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5663 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5664
5665 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5666 #define elf_backend_check_relocs elf_i386_check_relocs
5667 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5668 #define elf_backend_fake_sections elf_i386_fake_sections
5669 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5670 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5671 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
5672 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5673 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5674 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5675 #define elf_backend_relocate_section elf_i386_relocate_section
5676 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5677 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
5678
5679 #include "elf32-target.h"
5680
5681 /* FreeBSD support. */
5682
5683 #undef TARGET_LITTLE_SYM
5684 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5685 #undef TARGET_LITTLE_NAME
5686 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5687 #undef ELF_OSABI
5688 #define ELF_OSABI ELFOSABI_FREEBSD
5689
5690 /* The kernel recognizes executables as valid only if they carry a
5691 "FreeBSD" label in the ELF header. So we put this label on all
5692 executables and (for simplicity) also all other object files. */
5693
5694 static void
5695 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5696 {
5697 _bfd_elf_post_process_headers (abfd, info);
5698
5699 #ifdef OLD_FREEBSD_ABI_LABEL
5700 {
5701 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5702 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5703 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5704 }
5705 #endif
5706 }
5707
5708 #undef elf_backend_post_process_headers
5709 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5710 #undef elf32_bed
5711 #define elf32_bed elf32_i386_fbsd_bed
5712
5713 #undef elf_backend_add_symbol_hook
5714
5715 #include "elf32-target.h"
5716
5717 /* Solaris 2. */
5718
5719 #undef TARGET_LITTLE_SYM
5720 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5721 #undef TARGET_LITTLE_NAME
5722 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5723
5724 #undef elf_backend_post_process_headers
5725
5726 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5727 objects won't be recognized. */
5728 #undef ELF_OSABI
5729
5730 #undef elf32_bed
5731 #define elf32_bed elf32_i386_sol2_bed
5732
5733 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5734 boundary. */
5735 #undef elf_backend_static_tls_alignment
5736 #define elf_backend_static_tls_alignment 8
5737
5738 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5739
5740 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5741 File, p.63. */
5742 #undef elf_backend_want_plt_sym
5743 #define elf_backend_want_plt_sym 1
5744
5745 #undef elf_backend_strtab_flags
5746 #define elf_backend_strtab_flags SHF_STRINGS
5747
5748 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
5749 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5750 FALSE otherwise. ISECTION is the best guess matching section from the
5751 input bfd IBFD, but it might be NULL. */
5752
5753 static bfd_boolean
5754 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5755 bfd *obfd ATTRIBUTE_UNUSED,
5756 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5757 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
5758 {
5759 /* PR 19938: FIXME: Need to add code for setting the sh_info
5760 and sh_link fields of Solaris specific section types. */
5761 return FALSE;
5762
5763 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
5764 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
5765
5766 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
5767
5768 The following values should be set:
5769
5770 Type Link Info
5771 -----------------------------------------------------------------------------
5772 SHT_SUNW_ancillary The section header index of 0
5773 [0x6fffffee] the associated string table.
5774
5775 SHT_SUNW_capinfo The section header index of For a dynamic object, the
5776 [0x6ffffff0] the associated symbol table. section header index of
5777 the associated
5778 SHT_SUNW_capchain table,
5779 otherwise 0.
5780
5781 SHT_SUNW_symsort The section header index of 0
5782 [0x6ffffff1] the associated symbol table.
5783
5784 SHT_SUNW_tlssort The section header index of 0
5785 [0x6ffffff2] the associated symbol table.
5786
5787 SHT_SUNW_LDYNSYM The section header index of One greater than the
5788 [0x6ffffff3] the associated string table. symbol table index of the
5789 This index is the same string last local symbol,
5790 table used by the SHT_DYNSYM STB_LOCAL. Since
5791 section. SHT_SUNW_LDYNSYM only
5792 contains local symbols,
5793 sh_info is equivalent to
5794 the number of symbols in
5795 the table.
5796
5797 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
5798 [0x6ffffff5] the section header index of to named strings, the
5799 the associated section header index of
5800 SHT_SUNW_capinfo table, the associated string
5801 otherwise 0. table, otherwise 0.
5802
5803 SHT_SUNW_move The section header index of 0
5804 [0x6ffffffa] the associated symbol table.
5805
5806 SHT_SUNW_COMDAT 0 0
5807 [0x6ffffffb]
5808
5809 SHT_SUNW_syminfo The section header index of The section header index
5810 [0x6ffffffc] the associated symbol table. of the associated
5811 .dynamic section.
5812
5813 SHT_SUNW_verdef The section header index of The number of version
5814 [0x6ffffffd] the associated string table. definitions within the
5815 section.
5816
5817 SHT_SUNW_verneed The section header index of The number of version
5818 [0x6ffffffe] the associated string table. dependencies within the
5819 section.
5820
5821 SHT_SUNW_versym The section header index of 0
5822 [0x6fffffff] the associated symbol table. */
5823 }
5824
5825 #undef elf_backend_copy_special_section_fields
5826 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
5827
5828 #include "elf32-target.h"
5829
5830 /* Intel MCU support. */
5831
5832 static bfd_boolean
5833 elf32_iamcu_elf_object_p (bfd *abfd)
5834 {
5835 /* Set the right machine number for an IAMCU elf32 file. */
5836 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5837 return TRUE;
5838 }
5839
5840 #undef TARGET_LITTLE_SYM
5841 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5842 #undef TARGET_LITTLE_NAME
5843 #define TARGET_LITTLE_NAME "elf32-iamcu"
5844 #undef ELF_ARCH
5845 #define ELF_ARCH bfd_arch_iamcu
5846
5847 #undef ELF_MACHINE_CODE
5848 #define ELF_MACHINE_CODE EM_IAMCU
5849
5850 #undef ELF_OSABI
5851
5852 #undef elf32_bed
5853 #define elf32_bed elf32_iamcu_bed
5854
5855 #undef elf_backend_object_p
5856 #define elf_backend_object_p elf32_iamcu_elf_object_p
5857
5858 #undef elf_backend_static_tls_alignment
5859
5860 #undef elf_backend_want_plt_sym
5861 #define elf_backend_want_plt_sym 0
5862
5863 #undef elf_backend_strtab_flags
5864 #undef elf_backend_copy_special_section_fields
5865
5866 #include "elf32-target.h"
5867
5868 /* Restore defaults. */
5869 #undef ELF_ARCH
5870 #define ELF_ARCH bfd_arch_i386
5871 #undef ELF_MACHINE_CODE
5872 #define ELF_MACHINE_CODE EM_386
5873
5874 /* Native Client support. */
5875
5876 #undef TARGET_LITTLE_SYM
5877 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5878 #undef TARGET_LITTLE_NAME
5879 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5880 #undef elf32_bed
5881 #define elf32_bed elf32_i386_nacl_bed
5882
5883 #undef ELF_MAXPAGESIZE
5884 #define ELF_MAXPAGESIZE 0x10000
5885
5886 /* Restore defaults. */
5887 #undef ELF_OSABI
5888 #undef elf_backend_want_plt_sym
5889 #define elf_backend_want_plt_sym 0
5890 #undef elf_backend_post_process_headers
5891 #undef elf_backend_static_tls_alignment
5892
5893 /* NaCl uses substantially different PLT entries for the same effects. */
5894
5895 #undef elf_backend_plt_alignment
5896 #define elf_backend_plt_alignment 5
5897 #define NACL_PLT_ENTRY_SIZE 64
5898 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5899
5900 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5901 {
5902 0xff, 0x35, /* pushl contents of address */
5903 0, 0, 0, 0, /* replaced with address of .got + 4. */
5904 0x8b, 0x0d, /* movl contents of address, %ecx */
5905 0, 0, 0, 0, /* replaced with address of .got + 8. */
5906 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5907 0xff, 0xe1 /* jmp *%ecx */
5908 };
5909
5910 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5911 {
5912 0x8b, 0x0d, /* movl contents of address, %ecx */
5913 0, 0, 0, 0, /* replaced with GOT slot address. */
5914 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5915 0xff, 0xe1, /* jmp *%ecx */
5916
5917 /* Pad to the next 32-byte boundary with nop instructions. */
5918 0x90,
5919 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5920 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5921
5922 /* Lazy GOT entries point here (32-byte aligned). */
5923 0x68, /* pushl immediate */
5924 0, 0, 0, 0, /* replaced with reloc offset. */
5925 0xe9, /* jmp relative */
5926 0, 0, 0, 0, /* replaced with offset to .plt. */
5927
5928 /* Pad to the next 32-byte boundary with nop instructions. */
5929 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5930 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5931 0x90, 0x90
5932 };
5933
5934 static const bfd_byte
5935 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5936 {
5937 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5938 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5939 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5940 0xff, 0xe1, /* jmp *%ecx */
5941
5942 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5943 so pad to that size with nop instructions. */
5944 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5945 };
5946
5947 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5948 {
5949 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5950 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5951 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5952 0xff, 0xe1, /* jmp *%ecx */
5953
5954 /* Pad to the next 32-byte boundary with nop instructions. */
5955 0x90,
5956 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5957 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5958
5959 /* Lazy GOT entries point here (32-byte aligned). */
5960 0x68, /* pushl immediate */
5961 0, 0, 0, 0, /* replaced with offset into relocation table. */
5962 0xe9, /* jmp relative */
5963 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5964
5965 /* Pad to the next 32-byte boundary with nop instructions. */
5966 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5967 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5968 0x90, 0x90
5969 };
5970
5971 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5972 {
5973 #if (PLT_CIE_LENGTH != 20 \
5974 || PLT_FDE_LENGTH != 36 \
5975 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5976 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5977 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5978 #endif
5979 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5980 0, 0, 0, 0, /* CIE ID */
5981 1, /* CIE version */
5982 'z', 'R', 0, /* Augmentation string */
5983 1, /* Code alignment factor */
5984 0x7c, /* Data alignment factor: -4 */
5985 8, /* Return address column */
5986 1, /* Augmentation size */
5987 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5988 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5989 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5990 DW_CFA_nop, DW_CFA_nop,
5991
5992 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5993 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5994 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5995 0, 0, 0, 0, /* .plt size goes here */
5996 0, /* Augmentation size */
5997 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5998 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5999 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
6000 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6001 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6002 13, /* Block length */
6003 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
6004 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
6005 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6006 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
6007 DW_CFA_nop, DW_CFA_nop
6008 };
6009
6010 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
6011 {
6012 elf_i386_nacl_plt0_entry, /* plt0_entry */
6013 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
6014 elf_i386_nacl_plt_entry, /* plt_entry */
6015 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6016 2, /* plt0_got1_offset */
6017 8, /* plt0_got2_offset */
6018 0, /* plt0_got2_insn_end */
6019 2, /* plt_got_offset */
6020 33, /* plt_reloc_offset */
6021 38, /* plt_plt_offset */
6022 0, /* plt_got_insn_size */
6023 0, /* plt_plt_insn_end */
6024 32, /* plt_lazy_offset */
6025 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6026 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6027 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6028 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
6029 };
6030
6031 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6032 {
6033 0x90, /* plt0_pad_byte: nop insn */
6034 is_nacl /* os */
6035 };
6036
6037 static bfd_boolean
6038 elf32_i386_nacl_elf_object_p (bfd *abfd)
6039 {
6040 /* Set the right machine number for a NaCl i386 ELF32 file. */
6041 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6042 return TRUE;
6043 }
6044
6045 #undef elf_backend_arch_data
6046 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6047
6048 #undef elf_backend_object_p
6049 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6050 #undef elf_backend_modify_segment_map
6051 #define elf_backend_modify_segment_map nacl_modify_segment_map
6052 #undef elf_backend_modify_program_headers
6053 #define elf_backend_modify_program_headers nacl_modify_program_headers
6054 #undef elf_backend_final_write_processing
6055 #define elf_backend_final_write_processing nacl_final_write_processing
6056
6057 #include "elf32-target.h"
6058
6059 /* Restore defaults. */
6060 #undef elf_backend_object_p
6061 #undef elf_backend_modify_segment_map
6062 #undef elf_backend_modify_program_headers
6063 #undef elf_backend_final_write_processing
6064
6065 /* VxWorks support. */
6066
6067 #undef TARGET_LITTLE_SYM
6068 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6069 #undef TARGET_LITTLE_NAME
6070 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6071 #undef ELF_OSABI
6072 #undef ELF_MAXPAGESIZE
6073 #define ELF_MAXPAGESIZE 0x1000
6074 #undef elf_backend_plt_alignment
6075 #define elf_backend_plt_alignment 4
6076
6077 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6078 {
6079 0x90, /* plt0_pad_byte */
6080 is_vxworks /* os */
6081 };
6082
6083 #undef elf_backend_arch_data
6084 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6085
6086 #undef elf_backend_relocs_compatible
6087 #undef elf_backend_add_symbol_hook
6088 #define elf_backend_add_symbol_hook \
6089 elf_vxworks_add_symbol_hook
6090 #undef elf_backend_link_output_symbol_hook
6091 #define elf_backend_link_output_symbol_hook \
6092 elf_vxworks_link_output_symbol_hook
6093 #undef elf_backend_emit_relocs
6094 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6095 #undef elf_backend_final_write_processing
6096 #define elf_backend_final_write_processing \
6097 elf_vxworks_final_write_processing
6098 #undef elf_backend_static_tls_alignment
6099
6100 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6101 define it. */
6102 #undef elf_backend_want_plt_sym
6103 #define elf_backend_want_plt_sym 1
6104
6105 #undef elf32_bed
6106 #define elf32_bed elf32_i386_vxworks_bed
6107
6108 #include "elf32-target.h"
GDB Binutils - Deliverables
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