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x86: Treat relocation against IFUNC symbol as FUNC
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2018 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 #define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32)
186
187 #define X86_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32)
188
189 #ifdef DEBUG_GEN_RELOC
190 #define TRACE(str) \
191 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
192 #else
193 #define TRACE(str)
194 #endif
195
196 static reloc_howto_type *
197 elf_i386_reloc_type_lookup (bfd *abfd,
198 bfd_reloc_code_real_type code)
199 {
200 switch (code)
201 {
202 case BFD_RELOC_NONE:
203 TRACE ("BFD_RELOC_NONE");
204 return &elf_howto_table[R_386_NONE];
205
206 case BFD_RELOC_32:
207 TRACE ("BFD_RELOC_32");
208 return &elf_howto_table[R_386_32];
209
210 case BFD_RELOC_CTOR:
211 TRACE ("BFD_RELOC_CTOR");
212 return &elf_howto_table[R_386_32];
213
214 case BFD_RELOC_32_PCREL:
215 TRACE ("BFD_RELOC_PC32");
216 return &elf_howto_table[R_386_PC32];
217
218 case BFD_RELOC_386_GOT32:
219 TRACE ("BFD_RELOC_386_GOT32");
220 return &elf_howto_table[R_386_GOT32];
221
222 case BFD_RELOC_386_PLT32:
223 TRACE ("BFD_RELOC_386_PLT32");
224 return &elf_howto_table[R_386_PLT32];
225
226 case BFD_RELOC_386_COPY:
227 TRACE ("BFD_RELOC_386_COPY");
228 return &elf_howto_table[R_386_COPY];
229
230 case BFD_RELOC_386_GLOB_DAT:
231 TRACE ("BFD_RELOC_386_GLOB_DAT");
232 return &elf_howto_table[R_386_GLOB_DAT];
233
234 case BFD_RELOC_386_JUMP_SLOT:
235 TRACE ("BFD_RELOC_386_JUMP_SLOT");
236 return &elf_howto_table[R_386_JUMP_SLOT];
237
238 case BFD_RELOC_386_RELATIVE:
239 TRACE ("BFD_RELOC_386_RELATIVE");
240 return &elf_howto_table[R_386_RELATIVE];
241
242 case BFD_RELOC_386_GOTOFF:
243 TRACE ("BFD_RELOC_386_GOTOFF");
244 return &elf_howto_table[R_386_GOTOFF];
245
246 case BFD_RELOC_386_GOTPC:
247 TRACE ("BFD_RELOC_386_GOTPC");
248 return &elf_howto_table[R_386_GOTPC];
249
250 /* These relocs are a GNU extension. */
251 case BFD_RELOC_386_TLS_TPOFF:
252 TRACE ("BFD_RELOC_386_TLS_TPOFF");
253 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
254
255 case BFD_RELOC_386_TLS_IE:
256 TRACE ("BFD_RELOC_386_TLS_IE");
257 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
258
259 case BFD_RELOC_386_TLS_GOTIE:
260 TRACE ("BFD_RELOC_386_TLS_GOTIE");
261 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
262
263 case BFD_RELOC_386_TLS_LE:
264 TRACE ("BFD_RELOC_386_TLS_LE");
265 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
266
267 case BFD_RELOC_386_TLS_GD:
268 TRACE ("BFD_RELOC_386_TLS_GD");
269 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
270
271 case BFD_RELOC_386_TLS_LDM:
272 TRACE ("BFD_RELOC_386_TLS_LDM");
273 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
274
275 case BFD_RELOC_16:
276 TRACE ("BFD_RELOC_16");
277 return &elf_howto_table[R_386_16 - R_386_ext_offset];
278
279 case BFD_RELOC_16_PCREL:
280 TRACE ("BFD_RELOC_16_PCREL");
281 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
282
283 case BFD_RELOC_8:
284 TRACE ("BFD_RELOC_8");
285 return &elf_howto_table[R_386_8 - R_386_ext_offset];
286
287 case BFD_RELOC_8_PCREL:
288 TRACE ("BFD_RELOC_8_PCREL");
289 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
290
291 /* Common with Sun TLS implementation. */
292 case BFD_RELOC_386_TLS_LDO_32:
293 TRACE ("BFD_RELOC_386_TLS_LDO_32");
294 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
295
296 case BFD_RELOC_386_TLS_IE_32:
297 TRACE ("BFD_RELOC_386_TLS_IE_32");
298 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
299
300 case BFD_RELOC_386_TLS_LE_32:
301 TRACE ("BFD_RELOC_386_TLS_LE_32");
302 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
303
304 case BFD_RELOC_386_TLS_DTPMOD32:
305 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
306 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
307
308 case BFD_RELOC_386_TLS_DTPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
310 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
311
312 case BFD_RELOC_386_TLS_TPOFF32:
313 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
314 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
315
316 case BFD_RELOC_SIZE32:
317 TRACE ("BFD_RELOC_SIZE32");
318 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
319
320 case BFD_RELOC_386_TLS_GOTDESC:
321 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
322 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
323
324 case BFD_RELOC_386_TLS_DESC_CALL:
325 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
326 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
327
328 case BFD_RELOC_386_TLS_DESC:
329 TRACE ("BFD_RELOC_386_TLS_DESC");
330 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
331
332 case BFD_RELOC_386_IRELATIVE:
333 TRACE ("BFD_RELOC_386_IRELATIVE");
334 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
335
336 case BFD_RELOC_386_GOT32X:
337 TRACE ("BFD_RELOC_386_GOT32X");
338 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
339
340 case BFD_RELOC_VTABLE_INHERIT:
341 TRACE ("BFD_RELOC_VTABLE_INHERIT");
342 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
343
344 case BFD_RELOC_VTABLE_ENTRY:
345 TRACE ("BFD_RELOC_VTABLE_ENTRY");
346 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
347
348 default:
349 TRACE ("Unknown");
350 /* xgettext:c-format */
351 _bfd_error_handler (_("%pB: unsupported relocation type: %#x"),
352 abfd, (int) code);
353 bfd_set_error (bfd_error_bad_value);
354 return NULL;
355 }
356 }
357
358 static reloc_howto_type *
359 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
360 const char *r_name)
361 {
362 unsigned int i;
363
364 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
365 if (elf_howto_table[i].name != NULL
366 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
367 return &elf_howto_table[i];
368
369 return NULL;
370 }
371
372 static reloc_howto_type *
373 elf_i386_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, unsigned r_type)
374 {
375 unsigned int indx;
376
377 if ((indx = r_type) >= R_386_standard
378 && ((indx = r_type - R_386_ext_offset) - R_386_standard
379 >= R_386_ext - R_386_standard)
380 && ((indx = r_type - R_386_tls_offset) - R_386_ext
381 >= R_386_ext2 - R_386_ext)
382 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
383 >= R_386_vt - R_386_ext2))
384 return NULL;
385 /* PR 17512: file: 0f67f69d. */
386 if (elf_howto_table [indx].type != r_type)
387 return NULL;
388 return &elf_howto_table[indx];
389 }
390
391 static bfd_boolean
392 elf_i386_info_to_howto_rel (bfd *abfd,
393 arelent *cache_ptr,
394 Elf_Internal_Rela *dst)
395 {
396 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
397
398 if ((cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type)) == NULL)
399 {
400 /* xgettext:c-format */
401 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
402 abfd, r_type);
403 bfd_set_error (bfd_error_bad_value);
404 return FALSE;
405 }
406
407 return TRUE;
408 }
409
410 /* Return whether a symbol name implies a local label. The UnixWare
411 2.1 cc generates temporary symbols that start with .X, so we
412 recognize them here. FIXME: do other SVR4 compilers also use .X?.
413 If so, we should move the .X recognition into
414 _bfd_elf_is_local_label_name. */
415
416 static bfd_boolean
417 elf_i386_is_local_label_name (bfd *abfd, const char *name)
418 {
419 if (name[0] == '.' && name[1] == 'X')
420 return TRUE;
421
422 return _bfd_elf_is_local_label_name (abfd, name);
423 }
424 \f
425 /* Support for core dump NOTE sections. */
426
427 static bfd_boolean
428 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
429 {
430 int offset;
431 size_t size;
432
433 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
434 {
435 int pr_version = bfd_get_32 (abfd, note->descdata);
436
437 if (pr_version != 1)
438 return FALSE;
439
440 /* pr_cursig */
441 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
442
443 /* pr_pid */
444 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
445
446 /* pr_reg */
447 offset = 28;
448 size = bfd_get_32 (abfd, note->descdata + 8);
449 }
450 else
451 {
452 switch (note->descsz)
453 {
454 default:
455 return FALSE;
456
457 case 144: /* Linux/i386 */
458 /* pr_cursig */
459 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
460
461 /* pr_pid */
462 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
463
464 /* pr_reg */
465 offset = 72;
466 size = 68;
467
468 break;
469 }
470 }
471
472 /* Make a ".reg/999" section. */
473 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
474 size, note->descpos + offset);
475 }
476
477 static bfd_boolean
478 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
479 {
480 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
481 {
482 int pr_version = bfd_get_32 (abfd, note->descdata);
483
484 if (pr_version != 1)
485 return FALSE;
486
487 elf_tdata (abfd)->core->program
488 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
489 elf_tdata (abfd)->core->command
490 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
491 }
492 else
493 {
494 switch (note->descsz)
495 {
496 default:
497 return FALSE;
498
499 case 124: /* Linux/i386 elf_prpsinfo. */
500 elf_tdata (abfd)->core->pid
501 = bfd_get_32 (abfd, note->descdata + 12);
502 elf_tdata (abfd)->core->program
503 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
504 elf_tdata (abfd)->core->command
505 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
506 }
507 }
508
509 /* Note that for some reason, a spurious space is tacked
510 onto the end of the args in some (at least one anyway)
511 implementations, so strip it off if it exists. */
512 {
513 char *command = elf_tdata (abfd)->core->command;
514 int n = strlen (command);
515
516 if (0 < n && command[n - 1] == ' ')
517 command[n - 1] = '\0';
518 }
519
520 return TRUE;
521 }
522 \f
523 /* Functions for the i386 ELF linker.
524
525 In order to gain some understanding of code in this file without
526 knowing all the intricate details of the linker, note the
527 following:
528
529 Functions named elf_i386_* are called by external routines, other
530 functions are only called locally. elf_i386_* functions appear
531 in this file more or less in the order in which they are called
532 from external routines. eg. elf_i386_check_relocs is called
533 early in the link process, elf_i386_finish_dynamic_sections is
534 one of the last functions. */
535
536 /* The size in bytes of an entry in the lazy procedure linkage table. */
537
538 #define LAZY_PLT_ENTRY_SIZE 16
539
540 /* The size in bytes of an entry in the non-lazy procedure linkage
541 table. */
542
543 #define NON_LAZY_PLT_ENTRY_SIZE 8
544
545 /* The first entry in an absolute lazy procedure linkage table looks
546 like this. See the SVR4 ABI i386 supplement to see how this works.
547 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
548
549 static const bfd_byte elf_i386_lazy_plt0_entry[12] =
550 {
551 0xff, 0x35, /* pushl contents of address */
552 0, 0, 0, 0, /* replaced with address of .got + 4. */
553 0xff, 0x25, /* jmp indirect */
554 0, 0, 0, 0 /* replaced with address of .got + 8. */
555 };
556
557 /* Subsequent entries in an absolute lazy procedure linkage table look
558 like this. */
559
560 static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
561 {
562 0xff, 0x25, /* jmp indirect */
563 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
564 0x68, /* pushl immediate */
565 0, 0, 0, 0, /* replaced with offset into relocation table. */
566 0xe9, /* jmp relative */
567 0, 0, 0, 0 /* replaced with offset to start of .plt. */
568 };
569
570 /* The first entry in a PIC lazy procedure linkage table look like
571 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
572 lazy_plt->plt0_pad_byte. */
573
574 static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
575 {
576 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
577 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
578 };
579
580 /* Subsequent entries in a PIC lazy procedure linkage table look like
581 this. */
582
583 static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
584 {
585 0xff, 0xa3, /* jmp *offset(%ebx) */
586 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
587 0x68, /* pushl immediate */
588 0, 0, 0, 0, /* replaced with offset into relocation table. */
589 0xe9, /* jmp relative */
590 0, 0, 0, 0 /* replaced with offset to start of .plt. */
591 };
592
593 /* Entries in the non-lazy procedure linkage table look like this. */
594
595 static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
596 {
597 0xff, 0x25, /* jmp indirect */
598 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
599 0x66, 0x90 /* xchg %ax,%ax */
600 };
601
602 /* Entries in the PIC non-lazy procedure linkage table look like
603 this. */
604
605 static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
606 {
607 0xff, 0xa3, /* jmp *offset(%ebx) */
608 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
610 };
611
612 /* The first entry in an absolute IBT-enabled lazy procedure linkage
613 table looks like this. */
614
615 static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
616 {
617 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
618 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
619 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
620 };
621
622 /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
623 table look like this. Subsequent entries for a PIC IBT-enabled lazy
624 procedure linkage table are the same. */
625
626 static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
627 {
628 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
629 0x68, 0, 0, 0, 0, /* pushl immediate */
630 0xe9, 0, 0, 0, 0, /* jmp relative */
631 0x66, 0x90 /* xchg %ax,%ax */
632 };
633
634 /* The first entry in a PIC IBT-enabled lazy procedure linkage table
635 look like. */
636
637 static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
638 {
639 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
640 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
641 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
642 };
643
644 /* Entries for branches with IBT-enabled in the absolute non-lazey
645 procedure linkage table look like this. They have the same size
646 as the lazy PLT entry. */
647
648 static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
649 {
650 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
651 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
652 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
653 };
654
655 /* Entries for branches with IBT-enabled in the PIC non-lazey procedure
656 linkage table look like this. They have the same size as the lazy
657 PLT entry. */
658
659 static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
660 {
661 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
662 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
663 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
664 };
665
666 /* .eh_frame covering the lazy .plt section. */
667
668 static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
669 {
670 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
671 0, 0, 0, 0, /* CIE ID */
672 1, /* CIE version */
673 'z', 'R', 0, /* Augmentation string */
674 1, /* Code alignment factor */
675 0x7c, /* Data alignment factor */
676 8, /* Return address column */
677 1, /* Augmentation size */
678 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
679 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
680 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
681 DW_CFA_nop, DW_CFA_nop,
682
683 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
684 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
685 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
686 0, 0, 0, 0, /* .plt size goes here */
687 0, /* Augmentation size */
688 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
689 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
690 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
691 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
692 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
693 11, /* Block length */
694 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
695 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
696 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
697 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
698 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
699 };
700
701 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
702
703 static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
704 {
705 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
706 0, 0, 0, 0, /* CIE ID */
707 1, /* CIE version */
708 'z', 'R', 0, /* Augmentation string */
709 1, /* Code alignment factor */
710 0x7c, /* Data alignment factor */
711 8, /* Return address column */
712 1, /* Augmentation size */
713 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
714 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
715 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
716 DW_CFA_nop, DW_CFA_nop,
717
718 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
719 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
720 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
721 0, 0, 0, 0, /* .plt size goes here */
722 0, /* Augmentation size */
723 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
724 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
725 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
726 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
727 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
728 11, /* Block length */
729 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
730 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
731 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
732 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
733 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
734 };
735
736 /* .eh_frame covering the non-lazy .plt section. */
737
738 static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
739 {
740 #define PLT_GOT_FDE_LENGTH 16
741 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
742 0, 0, 0, 0, /* CIE ID */
743 1, /* CIE version */
744 'z', 'R', 0, /* Augmentation string */
745 1, /* Code alignment factor */
746 0x7c, /* Data alignment factor */
747 8, /* Return address column */
748 1, /* Augmentation size */
749 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
750 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
751 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
752 DW_CFA_nop, DW_CFA_nop,
753
754 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
755 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
756 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
757 0, 0, 0, 0, /* non-lazy .plt size goes here */
758 0, /* Augmentation size */
759 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
760 };
761
762 /* These are the standard parameters. */
763 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
764 {
765 elf_i386_lazy_plt0_entry, /* plt0_entry */
766 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
767 elf_i386_lazy_plt_entry, /* plt_entry */
768 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
769 2, /* plt0_got1_offset */
770 8, /* plt0_got2_offset */
771 0, /* plt0_got2_insn_end */
772 2, /* plt_got_offset */
773 7, /* plt_reloc_offset */
774 12, /* plt_plt_offset */
775 0, /* plt_got_insn_size */
776 0, /* plt_plt_insn_end */
777 6, /* plt_lazy_offset */
778 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
779 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
780 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
781 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
782 };
783
784 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
785 {
786 elf_i386_non_lazy_plt_entry, /* plt_entry */
787 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
788 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
789 2, /* plt_got_offset */
790 0, /* plt_got_insn_size */
791 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
792 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
793 };
794
795 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
796 {
797 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
798 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
799 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
800 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
801 2, /* plt0_got1_offset */
802 8, /* plt0_got2_offset */
803 0, /* plt0_got2_insn_end */
804 4+2, /* plt_got_offset */
805 4+1, /* plt_reloc_offset */
806 4+6, /* plt_plt_offset */
807 0, /* plt_got_insn_size */
808 0, /* plt_plt_insn_end */
809 0, /* plt_lazy_offset */
810 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
811 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
812 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
813 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
814 };
815
816 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
817 {
818 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
819 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
820 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
821 4+2, /* plt_got_offset */
822 0, /* plt_got_insn_size */
823 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
824 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
825 };
826 \f
827
828 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
829 for the PLTResolve stub and then for each PLT entry. */
830 #define PLTRESOLVE_RELOCS_SHLIB 0
831 #define PLTRESOLVE_RELOCS 2
832 #define PLT_NON_JUMP_SLOT_RELOCS 2
833
834 /* These are the standard parameters. */
835 static const struct elf_x86_backend_data elf_i386_arch_bed =
836 {
837 is_normal /* os */
838 };
839
840 #define elf_backend_arch_data &elf_i386_arch_bed
841
842 /* Return TRUE if the TLS access code sequence support transition
843 from R_TYPE. */
844
845 static bfd_boolean
846 elf_i386_check_tls_transition (asection *sec,
847 bfd_byte *contents,
848 Elf_Internal_Shdr *symtab_hdr,
849 struct elf_link_hash_entry **sym_hashes,
850 unsigned int r_type,
851 const Elf_Internal_Rela *rel,
852 const Elf_Internal_Rela *relend)
853 {
854 unsigned int val, type, reg;
855 unsigned long r_symndx;
856 struct elf_link_hash_entry *h;
857 bfd_vma offset;
858 bfd_byte *call;
859 bfd_boolean indirect_call;
860
861 offset = rel->r_offset;
862 switch (r_type)
863 {
864 case R_386_TLS_GD:
865 case R_386_TLS_LDM:
866 if (offset < 2 || (rel + 1) >= relend)
867 return FALSE;
868
869 indirect_call = FALSE;
870 call = contents + offset + 4;
871 val = *(call - 5);
872 type = *(call - 6);
873 if (r_type == R_386_TLS_GD)
874 {
875 /* Check transition from GD access model. Only
876 leal foo@tlsgd(,%ebx,1), %eax
877 call ___tls_get_addr@PLT
878 or
879 leal foo@tlsgd(%ebx) %eax
880 call ___tls_get_addr@PLT
881 nop
882 or
883 leal foo@tlsgd(%reg), %eax
884 call *___tls_get_addr@GOT(%reg)
885 which may be converted to
886 addr32 call ___tls_get_addr
887 can transit to different access model. */
888 if ((offset + 10) > sec->size
889 || (type != 0x8d && type != 0x04))
890 return FALSE;
891
892 if (type == 0x04)
893 {
894 /* leal foo@tlsgd(,%ebx,1), %eax
895 call ___tls_get_addr@PLT */
896 if (offset < 3)
897 return FALSE;
898
899 if (*(call - 7) != 0x8d
900 || val != 0x1d
901 || call[0] != 0xe8)
902 return FALSE;
903 }
904 else
905 {
906 /* This must be
907 leal foo@tlsgd(%ebx), %eax
908 call ___tls_get_addr@PLT
909 nop
910 or
911 leal foo@tlsgd(%reg), %eax
912 call *___tls_get_addr@GOT(%reg)
913 which may be converted to
914 addr32 call ___tls_get_addr
915
916 %eax can't be used as the GOT base register since it
917 is used to pass parameter to ___tls_get_addr. */
918 reg = val & 7;
919 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
920 return FALSE;
921
922 indirect_call = call[0] == 0xff;
923 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
924 && !(call[0] == 0x67 && call[1] == 0xe8)
925 && !(indirect_call
926 && (call[1] & 0xf8) == 0x90
927 && (call[1] & 0x7) == reg))
928 return FALSE;
929 }
930 }
931 else
932 {
933 /* Check transition from LD access model. Only
934 leal foo@tlsldm(%ebx), %eax
935 call ___tls_get_addr@PLT
936 or
937 leal foo@tlsldm(%reg), %eax
938 call *___tls_get_addr@GOT(%reg)
939 which may be converted to
940 addr32 call ___tls_get_addr
941 can transit to different access model. */
942 if (type != 0x8d || (offset + 9) > sec->size)
943 return FALSE;
944
945 /* %eax can't be used as the GOT base register since it is
946 used to pass parameter to ___tls_get_addr. */
947 reg = val & 7;
948 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
949 return FALSE;
950
951 indirect_call = call[0] == 0xff;
952 if (!(reg == 3 && call[0] == 0xe8)
953 && !(call[0] == 0x67 && call[1] == 0xe8)
954 && !(indirect_call
955 && (call[1] & 0xf8) == 0x90
956 && (call[1] & 0x7) == reg))
957 return FALSE;
958 }
959
960 r_symndx = ELF32_R_SYM (rel[1].r_info);
961 if (r_symndx < symtab_hdr->sh_info)
962 return FALSE;
963
964 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
965 if (h == NULL
966 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
967 return FALSE;
968 else if (indirect_call)
969 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
970 else
971 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
972 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
973
974 case R_386_TLS_IE:
975 /* Check transition from IE access model:
976 movl foo@indntpoff(%rip), %eax
977 movl foo@indntpoff(%rip), %reg
978 addl foo@indntpoff(%rip), %reg
979 */
980
981 if (offset < 1 || (offset + 4) > sec->size)
982 return FALSE;
983
984 /* Check "movl foo@tpoff(%rip), %eax" first. */
985 val = bfd_get_8 (abfd, contents + offset - 1);
986 if (val == 0xa1)
987 return TRUE;
988
989 if (offset < 2)
990 return FALSE;
991
992 /* Check movl|addl foo@tpoff(%rip), %reg. */
993 type = bfd_get_8 (abfd, contents + offset - 2);
994 return ((type == 0x8b || type == 0x03)
995 && (val & 0xc7) == 0x05);
996
997 case R_386_TLS_GOTIE:
998 case R_386_TLS_IE_32:
999 /* Check transition from {IE_32,GOTIE} access model:
1000 subl foo@{tpoff,gontoff}(%reg1), %reg2
1001 movl foo@{tpoff,gontoff}(%reg1), %reg2
1002 addl foo@{tpoff,gontoff}(%reg1), %reg2
1003 */
1004
1005 if (offset < 2 || (offset + 4) > sec->size)
1006 return FALSE;
1007
1008 val = bfd_get_8 (abfd, contents + offset - 1);
1009 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1010 return FALSE;
1011
1012 type = bfd_get_8 (abfd, contents + offset - 2);
1013 return type == 0x8b || type == 0x2b || type == 0x03;
1014
1015 case R_386_TLS_GOTDESC:
1016 /* Check transition from GDesc access model:
1017 leal x@tlsdesc(%ebx), %eax
1018
1019 Make sure it's a leal adding ebx to a 32-bit offset
1020 into any register, although it's probably almost always
1021 going to be eax. */
1022
1023 if (offset < 2 || (offset + 4) > sec->size)
1024 return FALSE;
1025
1026 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1027 return FALSE;
1028
1029 val = bfd_get_8 (abfd, contents + offset - 1);
1030 return (val & 0xc7) == 0x83;
1031
1032 case R_386_TLS_DESC_CALL:
1033 /* Check transition from GDesc access model:
1034 call *x@tlsdesc(%eax)
1035 */
1036 if (offset + 2 <= sec->size)
1037 {
1038 /* Make sure that it's a call *x@tlsdesc(%eax). */
1039 call = contents + offset;
1040 return call[0] == 0xff && call[1] == 0x10;
1041 }
1042
1043 return FALSE;
1044
1045 default:
1046 abort ();
1047 }
1048 }
1049
1050 /* Return TRUE if the TLS access transition is OK or no transition
1051 will be performed. Update R_TYPE if there is a transition. */
1052
1053 static bfd_boolean
1054 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1055 asection *sec, bfd_byte *contents,
1056 Elf_Internal_Shdr *symtab_hdr,
1057 struct elf_link_hash_entry **sym_hashes,
1058 unsigned int *r_type, int tls_type,
1059 const Elf_Internal_Rela *rel,
1060 const Elf_Internal_Rela *relend,
1061 struct elf_link_hash_entry *h,
1062 unsigned long r_symndx,
1063 bfd_boolean from_relocate_section)
1064 {
1065 unsigned int from_type = *r_type;
1066 unsigned int to_type = from_type;
1067 bfd_boolean check = TRUE;
1068
1069 /* Skip TLS transition for functions. */
1070 if (h != NULL
1071 && (h->type == STT_FUNC
1072 || h->type == STT_GNU_IFUNC))
1073 return TRUE;
1074
1075 switch (from_type)
1076 {
1077 case R_386_TLS_GD:
1078 case R_386_TLS_GOTDESC:
1079 case R_386_TLS_DESC_CALL:
1080 case R_386_TLS_IE_32:
1081 case R_386_TLS_IE:
1082 case R_386_TLS_GOTIE:
1083 if (bfd_link_executable (info))
1084 {
1085 if (h == NULL)
1086 to_type = R_386_TLS_LE_32;
1087 else if (from_type != R_386_TLS_IE
1088 && from_type != R_386_TLS_GOTIE)
1089 to_type = R_386_TLS_IE_32;
1090 }
1091
1092 /* When we are called from elf_i386_relocate_section, there may
1093 be additional transitions based on TLS_TYPE. */
1094 if (from_relocate_section)
1095 {
1096 unsigned int new_to_type = to_type;
1097
1098 if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type))
1099 new_to_type = R_386_TLS_LE_32;
1100
1101 if (to_type == R_386_TLS_GD
1102 || to_type == R_386_TLS_GOTDESC
1103 || to_type == R_386_TLS_DESC_CALL)
1104 {
1105 if (tls_type == GOT_TLS_IE_POS)
1106 new_to_type = R_386_TLS_GOTIE;
1107 else if (tls_type & GOT_TLS_IE)
1108 new_to_type = R_386_TLS_IE_32;
1109 }
1110
1111 /* We checked the transition before when we were called from
1112 elf_i386_check_relocs. We only want to check the new
1113 transition which hasn't been checked before. */
1114 check = new_to_type != to_type && from_type == to_type;
1115 to_type = new_to_type;
1116 }
1117
1118 break;
1119
1120 case R_386_TLS_LDM:
1121 if (bfd_link_executable (info))
1122 to_type = R_386_TLS_LE_32;
1123 break;
1124
1125 default:
1126 return TRUE;
1127 }
1128
1129 /* Return TRUE if there is no transition. */
1130 if (from_type == to_type)
1131 return TRUE;
1132
1133 /* Check if the transition can be performed. */
1134 if (check
1135 && ! elf_i386_check_tls_transition (sec, contents,
1136 symtab_hdr, sym_hashes,
1137 from_type, rel, relend))
1138 {
1139 reloc_howto_type *from, *to;
1140 const char *name;
1141
1142 from = elf_i386_rtype_to_howto (abfd, from_type);
1143 to = elf_i386_rtype_to_howto (abfd, to_type);
1144
1145 if (h)
1146 name = h->root.root.string;
1147 else
1148 {
1149 struct elf_x86_link_hash_table *htab;
1150
1151 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1152 if (htab == NULL)
1153 name = "*unknown*";
1154 else
1155 {
1156 Elf_Internal_Sym *isym;
1157
1158 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1159 abfd, r_symndx);
1160 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1161 }
1162 }
1163
1164 _bfd_error_handler
1165 /* xgettext:c-format */
1166 (_("%pB: TLS transition from %s to %s against `%s'"
1167 " at %#" PRIx64 " in section `%pA' failed"),
1168 abfd, from->name, to->name, name,
1169 (uint64_t) rel->r_offset, sec);
1170 bfd_set_error (bfd_error_bad_value);
1171 return FALSE;
1172 }
1173
1174 *r_type = to_type;
1175 return TRUE;
1176 }
1177
1178 /* With the local symbol, foo, we convert
1179 mov foo@GOT[(%reg1)], %reg2
1180 to
1181 lea foo[@GOTOFF(%reg1)], %reg2
1182 and convert
1183 call/jmp *foo@GOT[(%reg)]
1184 to
1185 nop call foo/jmp foo nop
1186 When PIC is false, convert
1187 test %reg1, foo@GOT[(%reg2)]
1188 to
1189 test $foo, %reg1
1190 and convert
1191 binop foo@GOT[(%reg1)], %reg2
1192 to
1193 binop $foo, %reg2
1194 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1195 instructions. */
1196
1197 static
1198 bfd_boolean
1199 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1200 bfd_byte *contents,
1201 unsigned int *r_type_p,
1202 Elf_Internal_Rela *irel,
1203 struct elf_link_hash_entry *h,
1204 bfd_boolean *converted,
1205 struct bfd_link_info *link_info)
1206 {
1207 struct elf_x86_link_hash_table *htab;
1208 unsigned int opcode;
1209 unsigned int modrm;
1210 bfd_boolean baseless;
1211 Elf_Internal_Sym *isym;
1212 unsigned int addend;
1213 unsigned int nop;
1214 bfd_vma nop_offset;
1215 bfd_boolean is_pic;
1216 bfd_boolean to_reloc_32;
1217 unsigned int r_type;
1218 unsigned int r_symndx;
1219 bfd_vma roff = irel->r_offset;
1220 bfd_boolean local_ref;
1221 struct elf_x86_link_hash_entry *eh;
1222
1223 if (roff < 2)
1224 return TRUE;
1225
1226 /* Addend for R_386_GOT32X relocations must be 0. */
1227 addend = bfd_get_32 (abfd, contents + roff);
1228 if (addend != 0)
1229 return TRUE;
1230
1231 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
1232 is_pic = bfd_link_pic (link_info);
1233
1234 r_type = *r_type_p;
1235 r_symndx = ELF32_R_SYM (irel->r_info);
1236
1237 modrm = bfd_get_8 (abfd, contents + roff - 1);
1238 baseless = (modrm & 0xc7) == 0x5;
1239
1240 if (baseless && is_pic)
1241 {
1242 /* For PIC, disallow R_386_GOT32X without a base register
1243 since we don't know what the GOT base is. */
1244 const char *name;
1245
1246 if (h == NULL)
1247 {
1248 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1249 r_symndx);
1250 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1251 }
1252 else
1253 name = h->root.root.string;
1254
1255 _bfd_error_handler
1256 /* xgettext:c-format */
1257 (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
1258 " register can not be used when making a shared object"),
1259 abfd, name);
1260 return FALSE;
1261 }
1262
1263 opcode = bfd_get_8 (abfd, contents + roff - 2);
1264
1265 /* Convert to R_386_32 if PIC is false or there is no base
1266 register. */
1267 to_reloc_32 = !is_pic || baseless;
1268
1269 eh = elf_x86_hash_entry (h);
1270
1271 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1272 reloc. */
1273 if (h == NULL)
1274 {
1275 if (opcode == 0x0ff)
1276 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1277 goto convert_branch;
1278 else
1279 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1280 "test %reg1, foo@GOT(%reg2)" and
1281 "binop foo@GOT[(%reg1)], %reg2". */
1282 goto convert_load;
1283 }
1284
1285 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1286 local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
1287
1288 /* Undefined weak symbol is only bound locally in executable
1289 and its reference is resolved as 0. */
1290 if (h->root.type == bfd_link_hash_undefweak
1291 && !eh->linker_def
1292 && local_ref)
1293 {
1294 if (opcode == 0xff)
1295 {
1296 /* No direct branch to 0 for PIC. */
1297 if (is_pic)
1298 return TRUE;
1299 else
1300 goto convert_branch;
1301 }
1302 else
1303 {
1304 /* We can convert load of address 0 to R_386_32. */
1305 to_reloc_32 = TRUE;
1306 goto convert_load;
1307 }
1308 }
1309
1310 if (opcode == 0xff)
1311 {
1312 /* We have "call/jmp *foo@GOT[(%reg)]". */
1313 if ((h->root.type == bfd_link_hash_defined
1314 || h->root.type == bfd_link_hash_defweak)
1315 && local_ref)
1316 {
1317 /* The function is locally defined. */
1318 convert_branch:
1319 /* Convert R_386_GOT32X to R_386_PC32. */
1320 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1321 {
1322 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1323 is a nop prefix. */
1324 modrm = 0xe8;
1325 /* To support TLS optimization, always use addr32 prefix
1326 for "call *___tls_get_addr@GOT(%reg)". */
1327 if (eh && eh->tls_get_addr)
1328 {
1329 nop = 0x67;
1330 nop_offset = irel->r_offset - 2;
1331 }
1332 else
1333 {
1334 nop = link_info->call_nop_byte;
1335 if (link_info->call_nop_as_suffix)
1336 {
1337 nop_offset = roff + 3;
1338 irel->r_offset -= 1;
1339 }
1340 else
1341 nop_offset = roff - 2;
1342 }
1343 }
1344 else
1345 {
1346 /* Convert to "jmp foo nop". */
1347 modrm = 0xe9;
1348 nop = NOP_OPCODE;
1349 nop_offset = roff + 3;
1350 irel->r_offset -= 1;
1351 }
1352
1353 bfd_put_8 (abfd, nop, contents + nop_offset);
1354 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1355 /* When converting to PC-relative relocation, we
1356 need to adjust addend by -4. */
1357 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1358 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1359 *r_type_p = R_386_PC32;
1360 *converted = TRUE;
1361 }
1362 }
1363 else
1364 {
1365 /* We have "mov foo@GOT[(%re1g)], %reg2",
1366 "test %reg1, foo@GOT(%reg2)" and
1367 "binop foo@GOT[(%reg1)], %reg2".
1368
1369 Avoid optimizing _DYNAMIC since ld.so may use its
1370 link-time address. */
1371 if (h == htab->elf.hdynamic)
1372 return TRUE;
1373
1374 /* def_regular is set by an assignment in a linker script in
1375 bfd_elf_record_link_assignment. start_stop is set on
1376 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1377 if (h->start_stop
1378 || eh->linker_def
1379 || ((h->def_regular
1380 || h->root.type == bfd_link_hash_defined
1381 || h->root.type == bfd_link_hash_defweak)
1382 && local_ref))
1383 {
1384 convert_load:
1385 if (opcode == 0x8b)
1386 {
1387 if (to_reloc_32)
1388 {
1389 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1390 "mov $foo, %reg2" with R_386_32. */
1391 r_type = R_386_32;
1392 modrm = 0xc0 | (modrm & 0x38) >> 3;
1393 bfd_put_8 (abfd, modrm, contents + roff - 1);
1394 opcode = 0xc7;
1395 }
1396 else
1397 {
1398 /* Convert "mov foo@GOT(%reg1), %reg2" to
1399 "lea foo@GOTOFF(%reg1), %reg2". */
1400 r_type = R_386_GOTOFF;
1401 opcode = 0x8d;
1402 }
1403 }
1404 else
1405 {
1406 /* Only R_386_32 is supported. */
1407 if (!to_reloc_32)
1408 return TRUE;
1409
1410 if (opcode == 0x85)
1411 {
1412 /* Convert "test %reg1, foo@GOT(%reg2)" to
1413 "test $foo, %reg1". */
1414 modrm = 0xc0 | (modrm & 0x38) >> 3;
1415 opcode = 0xf7;
1416 }
1417 else
1418 {
1419 /* Convert "binop foo@GOT(%reg1), %reg2" to
1420 "binop $foo, %reg2". */
1421 modrm = (0xc0
1422 | (modrm & 0x38) >> 3
1423 | (opcode & 0x3c));
1424 opcode = 0x81;
1425 }
1426 bfd_put_8 (abfd, modrm, contents + roff - 1);
1427 r_type = R_386_32;
1428 }
1429
1430 bfd_put_8 (abfd, opcode, contents + roff - 2);
1431 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1432 *r_type_p = r_type;
1433 *converted = TRUE;
1434 }
1435 }
1436
1437 return TRUE;
1438 }
1439
1440 /* Rename some of the generic section flags to better document how they
1441 are used here. */
1442 #define check_relocs_failed sec_flg0
1443
1444 /* Look through the relocs for a section during the first phase, and
1445 calculate needed space in the global offset table, procedure linkage
1446 table, and dynamic reloc sections. */
1447
1448 static bfd_boolean
1449 elf_i386_check_relocs (bfd *abfd,
1450 struct bfd_link_info *info,
1451 asection *sec,
1452 const Elf_Internal_Rela *relocs)
1453 {
1454 struct elf_x86_link_hash_table *htab;
1455 Elf_Internal_Shdr *symtab_hdr;
1456 struct elf_link_hash_entry **sym_hashes;
1457 const Elf_Internal_Rela *rel;
1458 const Elf_Internal_Rela *rel_end;
1459 asection *sreloc;
1460 bfd_byte *contents;
1461 bfd_boolean converted;
1462
1463 if (bfd_link_relocatable (info))
1464 return TRUE;
1465
1466 /* Don't do anything special with non-loaded, non-alloced sections.
1467 In particular, any relocs in such sections should not affect GOT
1468 and PLT reference counting (ie. we don't allow them to create GOT
1469 or PLT entries), there's no possibility or desire to optimize TLS
1470 relocs, and there's not much point in propagating relocs to shared
1471 libs that the dynamic linker won't relocate. */
1472 if ((sec->flags & SEC_ALLOC) == 0)
1473 return TRUE;
1474
1475 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1476 if (htab == NULL)
1477 {
1478 sec->check_relocs_failed = 1;
1479 return FALSE;
1480 }
1481
1482 BFD_ASSERT (is_x86_elf (abfd, htab));
1483
1484 /* Get the section contents. */
1485 if (elf_section_data (sec)->this_hdr.contents != NULL)
1486 contents = elf_section_data (sec)->this_hdr.contents;
1487 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1488 {
1489 sec->check_relocs_failed = 1;
1490 return FALSE;
1491 }
1492
1493 symtab_hdr = &elf_symtab_hdr (abfd);
1494 sym_hashes = elf_sym_hashes (abfd);
1495
1496 converted = FALSE;
1497
1498 sreloc = NULL;
1499
1500 rel_end = relocs + sec->reloc_count;
1501 for (rel = relocs; rel < rel_end; rel++)
1502 {
1503 unsigned int r_type;
1504 unsigned int r_symndx;
1505 struct elf_link_hash_entry *h;
1506 struct elf_x86_link_hash_entry *eh;
1507 Elf_Internal_Sym *isym;
1508 const char *name;
1509 bfd_boolean size_reloc;
1510
1511 r_symndx = ELF32_R_SYM (rel->r_info);
1512 r_type = ELF32_R_TYPE (rel->r_info);
1513
1514 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1515 {
1516 /* xgettext:c-format */
1517 _bfd_error_handler (_("%pB: bad symbol index: %d"),
1518 abfd, r_symndx);
1519 goto error_return;
1520 }
1521
1522 if (r_symndx < symtab_hdr->sh_info)
1523 {
1524 /* A local symbol. */
1525 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1526 abfd, r_symndx);
1527 if (isym == NULL)
1528 goto error_return;
1529
1530 /* Check relocation against local STT_GNU_IFUNC symbol. */
1531 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1532 {
1533 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
1534 if (h == NULL)
1535 goto error_return;
1536
1537 /* Fake a STT_GNU_IFUNC symbol. */
1538 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1539 isym, NULL);
1540 h->type = STT_GNU_IFUNC;
1541 h->def_regular = 1;
1542 h->ref_regular = 1;
1543 h->forced_local = 1;
1544 h->root.type = bfd_link_hash_defined;
1545 }
1546 else
1547 h = NULL;
1548 }
1549 else
1550 {
1551 isym = NULL;
1552 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1553 while (h->root.type == bfd_link_hash_indirect
1554 || h->root.type == bfd_link_hash_warning)
1555 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1556 }
1557
1558 eh = (struct elf_x86_link_hash_entry *) h;
1559 if (h != NULL)
1560 {
1561 if (r_type == R_386_GOTOFF)
1562 eh->gotoff_ref = 1;
1563
1564 /* It is referenced by a non-shared object. */
1565 h->ref_regular = 1;
1566
1567 if (h->type == STT_GNU_IFUNC)
1568 elf_tdata (info->output_bfd)->has_gnu_symbols
1569 |= elf_gnu_symbol_ifunc;
1570 }
1571
1572 if (r_type == R_386_GOT32X
1573 && (h == NULL || h->type != STT_GNU_IFUNC))
1574 {
1575 Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
1576 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
1577 &r_type, irel, h,
1578 &converted, info))
1579 goto error_return;
1580 }
1581
1582 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1583 symtab_hdr, sym_hashes,
1584 &r_type, GOT_UNKNOWN,
1585 rel, rel_end, h, r_symndx, FALSE))
1586 goto error_return;
1587
1588 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1589 if (h == htab->elf.hgot)
1590 htab->got_referenced = TRUE;
1591
1592 switch (r_type)
1593 {
1594 case R_386_TLS_LDM:
1595 htab->tls_ld_or_ldm_got.refcount = 1;
1596 goto create_got;
1597
1598 case R_386_PLT32:
1599 /* This symbol requires a procedure linkage table entry. We
1600 actually build the entry in adjust_dynamic_symbol,
1601 because this might be a case of linking PIC code which is
1602 never referenced by a dynamic object, in which case we
1603 don't need to generate a procedure linkage table entry
1604 after all. */
1605
1606 /* If this is a local symbol, we resolve it directly without
1607 creating a procedure linkage table entry. */
1608 if (h == NULL)
1609 continue;
1610
1611 eh->zero_undefweak &= 0x2;
1612 h->needs_plt = 1;
1613 h->plt.refcount = 1;
1614 break;
1615
1616 case R_386_SIZE32:
1617 size_reloc = TRUE;
1618 goto do_size;
1619
1620 case R_386_TLS_IE_32:
1621 case R_386_TLS_IE:
1622 case R_386_TLS_GOTIE:
1623 if (!bfd_link_executable (info))
1624 info->flags |= DF_STATIC_TLS;
1625 /* Fall through */
1626
1627 case R_386_GOT32:
1628 case R_386_GOT32X:
1629 case R_386_TLS_GD:
1630 case R_386_TLS_GOTDESC:
1631 case R_386_TLS_DESC_CALL:
1632 /* This symbol requires a global offset table entry. */
1633 {
1634 int tls_type, old_tls_type;
1635
1636 switch (r_type)
1637 {
1638 default:
1639 case R_386_GOT32:
1640 case R_386_GOT32X:
1641 tls_type = GOT_NORMAL;
1642 break;
1643 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1644 case R_386_TLS_GOTDESC:
1645 case R_386_TLS_DESC_CALL:
1646 tls_type = GOT_TLS_GDESC; break;
1647 case R_386_TLS_IE_32:
1648 if (ELF32_R_TYPE (rel->r_info) == r_type)
1649 tls_type = GOT_TLS_IE_NEG;
1650 else
1651 /* If this is a GD->IE transition, we may use either of
1652 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1653 tls_type = GOT_TLS_IE;
1654 break;
1655 case R_386_TLS_IE:
1656 case R_386_TLS_GOTIE:
1657 tls_type = GOT_TLS_IE_POS; break;
1658 }
1659
1660 if (h != NULL)
1661 {
1662 h->got.refcount = 1;
1663 old_tls_type = elf_x86_hash_entry (h)->tls_type;
1664 }
1665 else
1666 {
1667 bfd_signed_vma *local_got_refcounts;
1668
1669 /* This is a global offset table entry for a local symbol. */
1670 local_got_refcounts = elf_local_got_refcounts (abfd);
1671 if (local_got_refcounts == NULL)
1672 {
1673 bfd_size_type size;
1674
1675 size = symtab_hdr->sh_info;
1676 size *= (sizeof (bfd_signed_vma)
1677 + sizeof (bfd_vma) + sizeof(char));
1678 local_got_refcounts = (bfd_signed_vma *)
1679 bfd_zalloc (abfd, size);
1680 if (local_got_refcounts == NULL)
1681 goto error_return;
1682 elf_local_got_refcounts (abfd) = local_got_refcounts;
1683 elf_x86_local_tlsdesc_gotent (abfd)
1684 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1685 elf_x86_local_got_tls_type (abfd)
1686 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1687 }
1688 local_got_refcounts[r_symndx] = 1;
1689 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
1690 }
1691
1692 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1693 tls_type |= old_tls_type;
1694 /* If a TLS symbol is accessed using IE at least once,
1695 there is no point to use dynamic model for it. */
1696 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1697 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1698 || (tls_type & GOT_TLS_IE) == 0))
1699 {
1700 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1701 tls_type = old_tls_type;
1702 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1703 && GOT_TLS_GD_ANY_P (tls_type))
1704 tls_type |= old_tls_type;
1705 else
1706 {
1707 if (h)
1708 name = h->root.root.string;
1709 else
1710 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1711 NULL);
1712 _bfd_error_handler
1713 /* xgettext:c-format */
1714 (_("%pB: `%s' accessed both as normal and "
1715 "thread local symbol"),
1716 abfd, name);
1717 bfd_set_error (bfd_error_bad_value);
1718 goto error_return;
1719 }
1720 }
1721
1722 if (old_tls_type != tls_type)
1723 {
1724 if (h != NULL)
1725 elf_x86_hash_entry (h)->tls_type = tls_type;
1726 else
1727 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
1728 }
1729 }
1730 /* Fall through */
1731
1732 case R_386_GOTOFF:
1733 case R_386_GOTPC:
1734 create_got:
1735 if (r_type != R_386_TLS_IE)
1736 {
1737 if (eh != NULL)
1738 {
1739 eh->zero_undefweak &= 0x2;
1740
1741 /* Need GOT to resolve undefined weak symbol to 0. */
1742 if (r_type == R_386_GOTOFF
1743 && h->root.type == bfd_link_hash_undefweak
1744 && bfd_link_executable (info))
1745 htab->got_referenced = TRUE;
1746 }
1747 break;
1748 }
1749 /* Fall through */
1750
1751 case R_386_TLS_LE_32:
1752 case R_386_TLS_LE:
1753 if (eh != NULL)
1754 eh->zero_undefweak &= 0x2;
1755 if (bfd_link_executable (info))
1756 break;
1757 info->flags |= DF_STATIC_TLS;
1758 goto do_relocation;
1759
1760 case R_386_32:
1761 case R_386_PC32:
1762 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1763 eh->zero_undefweak |= 0x2;
1764 do_relocation:
1765 /* We are called after all symbols have been resolved. Only
1766 relocation against STT_GNU_IFUNC symbol must go through
1767 PLT. */
1768 if (h != NULL
1769 && (bfd_link_executable (info)
1770 || h->type == STT_GNU_IFUNC))
1771 {
1772 bfd_boolean func_pointer_ref = FALSE;
1773
1774 if (r_type == R_386_PC32)
1775 {
1776 /* Since something like ".long foo - ." may be used
1777 as pointer, make sure that PLT is used if foo is
1778 a function defined in a shared library. */
1779 if ((sec->flags & SEC_CODE) == 0)
1780 h->pointer_equality_needed = 1;
1781 else if (h->type == STT_GNU_IFUNC
1782 && bfd_link_pic (info))
1783 {
1784 _bfd_error_handler
1785 /* xgettext:c-format */
1786 (_("%pB: unsupported non-PIC call to IFUNC `%s'"),
1787 abfd, h->root.root.string);
1788 bfd_set_error (bfd_error_bad_value);
1789 goto error_return;
1790 }
1791 }
1792 else
1793 {
1794 h->pointer_equality_needed = 1;
1795 /* R_386_32 can be resolved at run-time. */
1796 if (r_type == R_386_32
1797 && (sec->flags & SEC_READONLY) == 0)
1798 func_pointer_ref = TRUE;
1799 }
1800
1801 if (!func_pointer_ref)
1802 {
1803 /* If this reloc is in a read-only section, we might
1804 need a copy reloc. We can't check reliably at this
1805 stage whether the section is read-only, as input
1806 sections have not yet been mapped to output sections.
1807 Tentatively set the flag for now, and correct in
1808 adjust_dynamic_symbol. */
1809 h->non_got_ref = 1;
1810
1811 /* We may need a .plt entry if the symbol is a function
1812 defined in a shared lib or is a function referenced
1813 from the code or read-only section. */
1814 if (!h->def_regular
1815 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1816 h->plt.refcount = 1;
1817 }
1818 }
1819
1820 size_reloc = FALSE;
1821 do_size:
1822 if (NEED_DYNAMIC_RELOCATION_P (info, FALSE, h, sec, r_type,
1823 R_386_32))
1824 {
1825 struct elf_dyn_relocs *p;
1826 struct elf_dyn_relocs **head;
1827
1828 /* We must copy these reloc types into the output file.
1829 Create a reloc section in dynobj and make room for
1830 this reloc. */
1831 if (sreloc == NULL)
1832 {
1833 sreloc = _bfd_elf_make_dynamic_reloc_section
1834 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1835
1836 if (sreloc == NULL)
1837 goto error_return;
1838 }
1839
1840 /* If this is a global symbol, we count the number of
1841 relocations we need for this symbol. */
1842 if (h != NULL)
1843 {
1844 head = &eh->dyn_relocs;
1845 }
1846 else
1847 {
1848 /* Track dynamic relocs needed for local syms too.
1849 We really need local syms available to do this
1850 easily. Oh well. */
1851 void **vpp;
1852 asection *s;
1853
1854 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1855 abfd, r_symndx);
1856 if (isym == NULL)
1857 goto error_return;
1858
1859 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1860 if (s == NULL)
1861 s = sec;
1862
1863 vpp = &elf_section_data (s)->local_dynrel;
1864 head = (struct elf_dyn_relocs **)vpp;
1865 }
1866
1867 p = *head;
1868 if (p == NULL || p->sec != sec)
1869 {
1870 bfd_size_type amt = sizeof *p;
1871 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1872 amt);
1873 if (p == NULL)
1874 goto error_return;
1875 p->next = *head;
1876 *head = p;
1877 p->sec = sec;
1878 p->count = 0;
1879 p->pc_count = 0;
1880 }
1881
1882 p->count += 1;
1883 /* Count size relocation as PC-relative relocation. */
1884 if (r_type == R_386_PC32 || size_reloc)
1885 p->pc_count += 1;
1886 }
1887 break;
1888
1889 /* This relocation describes the C++ object vtable hierarchy.
1890 Reconstruct it for later use during GC. */
1891 case R_386_GNU_VTINHERIT:
1892 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1893 goto error_return;
1894 break;
1895
1896 /* This relocation describes which C++ vtable entries are actually
1897 used. Record for later use during GC. */
1898 case R_386_GNU_VTENTRY:
1899 BFD_ASSERT (h != NULL);
1900 if (h != NULL
1901 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1902 goto error_return;
1903 break;
1904
1905 default:
1906 break;
1907 }
1908 }
1909
1910 if (elf_section_data (sec)->this_hdr.contents != contents)
1911 {
1912 if (!converted && !info->keep_memory)
1913 free (contents);
1914 else
1915 {
1916 /* Cache the section contents for elf_link_input_bfd if any
1917 load is converted or --no-keep-memory isn't used. */
1918 elf_section_data (sec)->this_hdr.contents = contents;
1919 }
1920 }
1921
1922 /* Cache relocations if any load is converted. */
1923 if (elf_section_data (sec)->relocs != relocs && converted)
1924 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
1925
1926 return TRUE;
1927
1928 error_return:
1929 if (elf_section_data (sec)->this_hdr.contents != contents)
1930 free (contents);
1931 sec->check_relocs_failed = 1;
1932 return FALSE;
1933 }
1934
1935 /* Set the correct type for an x86 ELF section. We do this by the
1936 section name, which is a hack, but ought to work. */
1937
1938 static bfd_boolean
1939 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1940 Elf_Internal_Shdr *hdr,
1941 asection *sec)
1942 {
1943 const char *name;
1944
1945 name = bfd_get_section_name (abfd, sec);
1946
1947 /* This is an ugly, but unfortunately necessary hack that is
1948 needed when producing EFI binaries on x86. It tells
1949 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1950 containing ELF relocation info. We need this hack in order to
1951 be able to generate ELF binaries that can be translated into
1952 EFI applications (which are essentially COFF objects). Those
1953 files contain a COFF ".reloc" section inside an ELFNN object,
1954 which would normally cause BFD to segfault because it would
1955 attempt to interpret this section as containing relocation
1956 entries for section "oc". With this hack enabled, ".reloc"
1957 will be treated as a normal data section, which will avoid the
1958 segfault. However, you won't be able to create an ELFNN binary
1959 with a section named "oc" that needs relocations, but that's
1960 the kind of ugly side-effects you get when detecting section
1961 types based on their names... In practice, this limitation is
1962 unlikely to bite. */
1963 if (strcmp (name, ".reloc") == 0)
1964 hdr->sh_type = SHT_PROGBITS;
1965
1966 return TRUE;
1967 }
1968
1969 /* Return the relocation value for @tpoff relocation
1970 if STT_TLS virtual address is ADDRESS. */
1971
1972 static bfd_vma
1973 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
1974 {
1975 struct elf_link_hash_table *htab = elf_hash_table (info);
1976 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
1977 bfd_vma static_tls_size;
1978
1979 /* If tls_sec is NULL, we should have signalled an error already. */
1980 if (htab->tls_sec == NULL)
1981 return 0;
1982
1983 /* Consider special static TLS alignment requirements. */
1984 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
1985 return static_tls_size + htab->tls_sec->vma - address;
1986 }
1987
1988 /* Relocate an i386 ELF section. */
1989
1990 static bfd_boolean
1991 elf_i386_relocate_section (bfd *output_bfd,
1992 struct bfd_link_info *info,
1993 bfd *input_bfd,
1994 asection *input_section,
1995 bfd_byte *contents,
1996 Elf_Internal_Rela *relocs,
1997 Elf_Internal_Sym *local_syms,
1998 asection **local_sections)
1999 {
2000 struct elf_x86_link_hash_table *htab;
2001 Elf_Internal_Shdr *symtab_hdr;
2002 struct elf_link_hash_entry **sym_hashes;
2003 bfd_vma *local_got_offsets;
2004 bfd_vma *local_tlsdesc_gotents;
2005 Elf_Internal_Rela *rel;
2006 Elf_Internal_Rela *wrel;
2007 Elf_Internal_Rela *relend;
2008 bfd_boolean is_vxworks_tls;
2009 unsigned plt_entry_size;
2010
2011 /* Skip if check_relocs failed. */
2012 if (input_section->check_relocs_failed)
2013 return FALSE;
2014
2015 htab = elf_x86_hash_table (info, I386_ELF_DATA);
2016 if (htab == NULL)
2017 return FALSE;
2018
2019 BFD_ASSERT (is_x86_elf (input_bfd, htab));
2020
2021 symtab_hdr = &elf_symtab_hdr (input_bfd);
2022 sym_hashes = elf_sym_hashes (input_bfd);
2023 local_got_offsets = elf_local_got_offsets (input_bfd);
2024 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
2025 /* We have to handle relocations in vxworks .tls_vars sections
2026 specially, because the dynamic loader is 'weird'. */
2027 is_vxworks_tls = (htab->target_os == is_vxworks
2028 && bfd_link_pic (info)
2029 && !strcmp (input_section->output_section->name,
2030 ".tls_vars"));
2031
2032 _bfd_x86_elf_set_tls_module_base (info);
2033
2034 plt_entry_size = htab->plt.plt_entry_size;
2035
2036 rel = wrel = relocs;
2037 relend = relocs + input_section->reloc_count;
2038 for (; rel < relend; wrel++, rel++)
2039 {
2040 unsigned int r_type, r_type_tls;
2041 reloc_howto_type *howto;
2042 unsigned long r_symndx;
2043 struct elf_link_hash_entry *h;
2044 struct elf_x86_link_hash_entry *eh;
2045 Elf_Internal_Sym *sym;
2046 asection *sec;
2047 bfd_vma off, offplt, plt_offset;
2048 bfd_vma relocation;
2049 bfd_boolean unresolved_reloc;
2050 bfd_reloc_status_type r;
2051 unsigned int indx;
2052 int tls_type;
2053 bfd_vma st_size;
2054 asection *resolved_plt;
2055 bfd_boolean resolved_to_zero;
2056 bfd_boolean relative_reloc;
2057
2058 r_type = ELF32_R_TYPE (rel->r_info);
2059 if (r_type == R_386_GNU_VTINHERIT
2060 || r_type == R_386_GNU_VTENTRY)
2061 {
2062 if (wrel != rel)
2063 *wrel = *rel;
2064 continue;
2065 }
2066
2067 if ((indx = r_type) >= R_386_standard
2068 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2069 >= R_386_ext - R_386_standard)
2070 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2071 >= R_386_ext2 - R_386_ext))
2072 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2073
2074 howto = elf_howto_table + indx;
2075
2076 r_symndx = ELF32_R_SYM (rel->r_info);
2077 h = NULL;
2078 sym = NULL;
2079 sec = NULL;
2080 unresolved_reloc = FALSE;
2081 if (r_symndx < symtab_hdr->sh_info)
2082 {
2083 sym = local_syms + r_symndx;
2084 sec = local_sections[r_symndx];
2085 relocation = (sec->output_section->vma
2086 + sec->output_offset
2087 + sym->st_value);
2088 st_size = sym->st_size;
2089
2090 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2091 && ((sec->flags & SEC_MERGE) != 0
2092 || (bfd_link_relocatable (info)
2093 && sec->output_offset != 0)))
2094 {
2095 bfd_vma addend;
2096 bfd_byte *where = contents + rel->r_offset;
2097
2098 switch (howto->size)
2099 {
2100 case 0:
2101 addend = bfd_get_8 (input_bfd, where);
2102 if (howto->pc_relative)
2103 {
2104 addend = (addend ^ 0x80) - 0x80;
2105 addend += 1;
2106 }
2107 break;
2108 case 1:
2109 addend = bfd_get_16 (input_bfd, where);
2110 if (howto->pc_relative)
2111 {
2112 addend = (addend ^ 0x8000) - 0x8000;
2113 addend += 2;
2114 }
2115 break;
2116 case 2:
2117 addend = bfd_get_32 (input_bfd, where);
2118 if (howto->pc_relative)
2119 {
2120 addend = (addend ^ 0x80000000) - 0x80000000;
2121 addend += 4;
2122 }
2123 break;
2124 default:
2125 abort ();
2126 }
2127
2128 if (bfd_link_relocatable (info))
2129 addend += sec->output_offset;
2130 else
2131 {
2132 asection *msec = sec;
2133 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2134 addend);
2135 addend -= relocation;
2136 addend += msec->output_section->vma + msec->output_offset;
2137 }
2138
2139 switch (howto->size)
2140 {
2141 case 0:
2142 /* FIXME: overflow checks. */
2143 if (howto->pc_relative)
2144 addend -= 1;
2145 bfd_put_8 (input_bfd, addend, where);
2146 break;
2147 case 1:
2148 if (howto->pc_relative)
2149 addend -= 2;
2150 bfd_put_16 (input_bfd, addend, where);
2151 break;
2152 case 2:
2153 if (howto->pc_relative)
2154 addend -= 4;
2155 bfd_put_32 (input_bfd, addend, where);
2156 break;
2157 }
2158 }
2159 else if (!bfd_link_relocatable (info)
2160 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2161 {
2162 /* Relocate against local STT_GNU_IFUNC symbol. */
2163 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2164 FALSE);
2165 if (h == NULL)
2166 abort ();
2167
2168 /* Set STT_GNU_IFUNC symbol value. */
2169 h->root.u.def.value = sym->st_value;
2170 h->root.u.def.section = sec;
2171 }
2172 }
2173 else
2174 {
2175 bfd_boolean warned ATTRIBUTE_UNUSED;
2176 bfd_boolean ignored ATTRIBUTE_UNUSED;
2177
2178 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2179 r_symndx, symtab_hdr, sym_hashes,
2180 h, sec, relocation,
2181 unresolved_reloc, warned, ignored);
2182 st_size = h->size;
2183 }
2184
2185 if (sec != NULL && discarded_section (sec))
2186 {
2187 _bfd_clear_contents (howto, input_bfd, input_section,
2188 contents + rel->r_offset);
2189 wrel->r_offset = rel->r_offset;
2190 wrel->r_info = 0;
2191 wrel->r_addend = 0;
2192
2193 /* For ld -r, remove relocations in debug sections against
2194 sections defined in discarded sections. Not done for
2195 eh_frame editing code expects to be present. */
2196 if (bfd_link_relocatable (info)
2197 && (input_section->flags & SEC_DEBUGGING))
2198 wrel--;
2199
2200 continue;
2201 }
2202
2203 if (bfd_link_relocatable (info))
2204 {
2205 if (wrel != rel)
2206 *wrel = *rel;
2207 continue;
2208 }
2209
2210 eh = (struct elf_x86_link_hash_entry *) h;
2211
2212 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2213 it here if it is defined in a non-shared object. */
2214 if (h != NULL
2215 && h->type == STT_GNU_IFUNC
2216 && h->def_regular)
2217 {
2218 asection *gotplt, *base_got;
2219 bfd_vma plt_index;
2220 const char *name;
2221
2222 if ((input_section->flags & SEC_ALLOC) == 0)
2223 {
2224 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2225 STT_GNU_IFUNC symbol as STT_FUNC. */
2226 if (elf_section_type (input_section) == SHT_NOTE)
2227 goto skip_ifunc;
2228 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2229 sections because such sections are not SEC_ALLOC and
2230 thus ld.so will not process them. */
2231 if ((input_section->flags & SEC_DEBUGGING) != 0)
2232 continue;
2233 abort ();
2234 }
2235
2236 /* STT_GNU_IFUNC symbol must go through PLT. */
2237 if (htab->elf.splt != NULL)
2238 {
2239 if (htab->plt_second != NULL)
2240 {
2241 resolved_plt = htab->plt_second;
2242 plt_offset = eh->plt_second.offset;
2243 }
2244 else
2245 {
2246 resolved_plt = htab->elf.splt;
2247 plt_offset = h->plt.offset;
2248 }
2249 gotplt = htab->elf.sgotplt;
2250 }
2251 else
2252 {
2253 resolved_plt = htab->elf.iplt;
2254 plt_offset = h->plt.offset;
2255 gotplt = htab->elf.igotplt;
2256 }
2257
2258 switch (r_type)
2259 {
2260 default:
2261 break;
2262
2263 case R_386_GOT32:
2264 case R_386_GOT32X:
2265 base_got = htab->elf.sgot;
2266 off = h->got.offset;
2267
2268 if (base_got == NULL)
2269 abort ();
2270
2271 if (off == (bfd_vma) -1)
2272 {
2273 /* We can't use h->got.offset here to save state, or
2274 even just remember the offset, as finish_dynamic_symbol
2275 would use that as offset into .got. */
2276
2277 if (h->plt.offset == (bfd_vma) -1)
2278 abort ();
2279
2280 if (htab->elf.splt != NULL)
2281 {
2282 plt_index = (h->plt.offset / plt_entry_size
2283 - htab->plt.has_plt0);
2284 off = (plt_index + 3) * 4;
2285 base_got = htab->elf.sgotplt;
2286 }
2287 else
2288 {
2289 plt_index = h->plt.offset / plt_entry_size;
2290 off = plt_index * 4;
2291 base_got = htab->elf.igotplt;
2292 }
2293
2294 if (h->dynindx == -1
2295 || h->forced_local
2296 || info->symbolic)
2297 {
2298 /* This references the local defitionion. We must
2299 initialize this entry in the global offset table.
2300 Since the offset must always be a multiple of 8,
2301 we use the least significant bit to record
2302 whether we have initialized it already.
2303
2304 When doing a dynamic link, we create a .rela.got
2305 relocation entry to initialize the value. This
2306 is done in the finish_dynamic_symbol routine. */
2307 if ((off & 1) != 0)
2308 off &= ~1;
2309 else
2310 {
2311 bfd_put_32 (output_bfd, relocation,
2312 base_got->contents + off);
2313 h->got.offset |= 1;
2314 }
2315 }
2316
2317 relocation = off;
2318 }
2319 else
2320 relocation = (base_got->output_section->vma
2321 + base_got->output_offset + off
2322 - gotplt->output_section->vma
2323 - gotplt->output_offset);
2324
2325 if (rel->r_offset > 1
2326 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2327 && *(contents + rel->r_offset - 2) != 0x8d)
2328 {
2329 if (bfd_link_pic (info))
2330 goto disallow_got32;
2331
2332 /* Add the GOT base if there is no base register. */
2333 relocation += (gotplt->output_section->vma
2334 + gotplt->output_offset);
2335 }
2336 else if (htab->elf.splt == NULL)
2337 {
2338 /* Adjust for static executables. */
2339 relocation += gotplt->output_offset;
2340 }
2341
2342 goto do_relocation;
2343 }
2344
2345 if (h->plt.offset == (bfd_vma) -1)
2346 {
2347 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2348 if (r_type == R_386_32
2349 && (input_section->flags & SEC_CODE) == 0)
2350 goto do_ifunc_pointer;
2351 goto bad_ifunc_reloc;
2352 }
2353
2354 relocation = (resolved_plt->output_section->vma
2355 + resolved_plt->output_offset + plt_offset);
2356
2357 switch (r_type)
2358 {
2359 default:
2360 bad_ifunc_reloc:
2361 if (h->root.root.string)
2362 name = h->root.root.string;
2363 else
2364 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2365 NULL);
2366 _bfd_error_handler
2367 /* xgettext:c-format */
2368 (_("%pB: relocation %s against STT_GNU_IFUNC "
2369 "symbol `%s' isn't supported"), input_bfd,
2370 howto->name, name);
2371 bfd_set_error (bfd_error_bad_value);
2372 return FALSE;
2373
2374 case R_386_32:
2375 /* Generate dynamic relcoation only when there is a
2376 non-GOT reference in a shared object. */
2377 if ((bfd_link_pic (info) && h->non_got_ref)
2378 || h->plt.offset == (bfd_vma) -1)
2379 {
2380 Elf_Internal_Rela outrel;
2381 asection *sreloc;
2382 bfd_vma offset;
2383
2384 do_ifunc_pointer:
2385 /* Need a dynamic relocation to get the real function
2386 adddress. */
2387 offset = _bfd_elf_section_offset (output_bfd,
2388 info,
2389 input_section,
2390 rel->r_offset);
2391 if (offset == (bfd_vma) -1
2392 || offset == (bfd_vma) -2)
2393 abort ();
2394
2395 outrel.r_offset = (input_section->output_section->vma
2396 + input_section->output_offset
2397 + offset);
2398
2399 if (POINTER_LOCAL_IFUNC_P (info, h))
2400 {
2401 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
2402 h->root.root.string,
2403 h->root.u.def.section->owner);
2404
2405 /* This symbol is resolved locally. */
2406 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2407 bfd_put_32 (output_bfd,
2408 (h->root.u.def.value
2409 + h->root.u.def.section->output_section->vma
2410 + h->root.u.def.section->output_offset),
2411 contents + offset);
2412 }
2413 else
2414 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2415
2416 /* Dynamic relocations are stored in
2417 1. .rel.ifunc section in PIC object.
2418 2. .rel.got section in dynamic executable.
2419 3. .rel.iplt section in static executable. */
2420 if (bfd_link_pic (info))
2421 sreloc = htab->elf.irelifunc;
2422 else if (htab->elf.splt != NULL)
2423 sreloc = htab->elf.srelgot;
2424 else
2425 sreloc = htab->elf.irelplt;
2426 elf_append_rel (output_bfd, sreloc, &outrel);
2427
2428 /* If this reloc is against an external symbol, we
2429 do not want to fiddle with the addend. Otherwise,
2430 we need to include the symbol value so that it
2431 becomes an addend for the dynamic reloc. For an
2432 internal symbol, we have updated addend. */
2433 continue;
2434 }
2435 /* FALLTHROUGH */
2436 case R_386_PC32:
2437 case R_386_PLT32:
2438 goto do_relocation;
2439
2440 case R_386_GOTOFF:
2441 relocation -= (gotplt->output_section->vma
2442 + gotplt->output_offset);
2443 goto do_relocation;
2444 }
2445 }
2446
2447 skip_ifunc:
2448 resolved_to_zero = (eh != NULL
2449 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
2450
2451 switch (r_type)
2452 {
2453 case R_386_GOT32X:
2454 /* Avoid optimizing _DYNAMIC since ld.so may use its
2455 link-time address. */
2456 if (h == htab->elf.hdynamic)
2457 goto r_386_got32;
2458
2459 if (bfd_link_pic (info))
2460 {
2461 /* It is OK to convert mov to lea and convert indirect
2462 branch to direct branch. It is OK to convert adc,
2463 add, and, cmp, or, sbb, sub, test, xor only when PIC
2464 is false. */
2465 unsigned int opcode, addend;
2466 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
2467 if (addend != 0)
2468 goto r_386_got32;
2469 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2470 if (opcode != 0x8b && opcode != 0xff)
2471 goto r_386_got32;
2472 }
2473
2474 /* Resolve "mov GOT[(%reg)], %reg",
2475 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
2476 and "binop foo@GOT[(%reg)], %reg". */
2477 if (h == NULL
2478 || (h->plt.offset == (bfd_vma) -1
2479 && h->got.offset == (bfd_vma) -1)
2480 || htab->elf.sgotplt == NULL)
2481 abort ();
2482
2483 offplt = (htab->elf.sgotplt->output_section->vma
2484 + htab->elf.sgotplt->output_offset);
2485
2486 /* It is relative to .got.plt section. */
2487 if (h->got.offset != (bfd_vma) -1)
2488 /* Use GOT entry. Mask off the least significant bit in
2489 GOT offset which may be set by R_386_GOT32 processing
2490 below. */
2491 relocation = (htab->elf.sgot->output_section->vma
2492 + htab->elf.sgot->output_offset
2493 + (h->got.offset & ~1) - offplt);
2494 else
2495 /* Use GOTPLT entry. */
2496 relocation = (h->plt.offset / plt_entry_size
2497 - htab->plt.has_plt0 + 3) * 4;
2498
2499 if (!bfd_link_pic (info))
2500 {
2501 /* If not PIC, add the .got.plt section address for
2502 baseless addressing. */
2503 unsigned int modrm;
2504 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2505 if ((modrm & 0xc7) == 0x5)
2506 relocation += offplt;
2507 }
2508
2509 unresolved_reloc = FALSE;
2510 break;
2511
2512 case R_386_GOT32:
2513 r_386_got32:
2514 /* Relocation is to the entry for this symbol in the global
2515 offset table. */
2516 if (htab->elf.sgot == NULL)
2517 abort ();
2518
2519 relative_reloc = FALSE;
2520 if (h != NULL)
2521 {
2522 off = h->got.offset;
2523 if (RESOLVED_LOCALLY_P (info, h, htab))
2524 {
2525 /* We must initialize this entry in the global offset
2526 table. Since the offset must always be a multiple
2527 of 4, we use the least significant bit to record
2528 whether we have initialized it already.
2529
2530 When doing a dynamic link, we create a .rel.got
2531 relocation entry to initialize the value. This
2532 is done in the finish_dynamic_symbol routine. */
2533 if ((off & 1) != 0)
2534 off &= ~1;
2535 else
2536 {
2537 bfd_put_32 (output_bfd, relocation,
2538 htab->elf.sgot->contents + off);
2539 h->got.offset |= 1;
2540
2541 if (GENERATE_RELATIVE_RELOC_P (info, h))
2542 {
2543 /* PR ld/21402: If this symbol isn't dynamic
2544 in PIC, generate R_386_RELATIVE here. */
2545 eh->no_finish_dynamic_symbol = 1;
2546 relative_reloc = TRUE;
2547 }
2548 }
2549 }
2550 else
2551 unresolved_reloc = FALSE;
2552 }
2553 else
2554 {
2555 if (local_got_offsets == NULL)
2556 abort ();
2557
2558 off = local_got_offsets[r_symndx];
2559
2560 /* The offset must always be a multiple of 4. We use
2561 the least significant bit to record whether we have
2562 already generated the necessary reloc. */
2563 if ((off & 1) != 0)
2564 off &= ~1;
2565 else
2566 {
2567 bfd_put_32 (output_bfd, relocation,
2568 htab->elf.sgot->contents + off);
2569 local_got_offsets[r_symndx] |= 1;
2570
2571 if (bfd_link_pic (info))
2572 relative_reloc = TRUE;
2573 }
2574 }
2575
2576 if (relative_reloc)
2577 {
2578 asection *s;
2579 Elf_Internal_Rela outrel;
2580
2581 s = htab->elf.srelgot;
2582 if (s == NULL)
2583 abort ();
2584
2585 outrel.r_offset = (htab->elf.sgot->output_section->vma
2586 + htab->elf.sgot->output_offset
2587 + off);
2588 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2589 elf_append_rel (output_bfd, s, &outrel);
2590 }
2591
2592 if (off >= (bfd_vma) -2)
2593 abort ();
2594
2595 relocation = (htab->elf.sgot->output_section->vma
2596 + htab->elf.sgot->output_offset + off);
2597 if (rel->r_offset > 1
2598 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2599 && *(contents + rel->r_offset - 2) != 0x8d)
2600 {
2601 if (bfd_link_pic (info))
2602 {
2603 /* For PIC, disallow R_386_GOT32 without a base
2604 register, except for "lea foo@GOT, %reg", since
2605 we don't know what the GOT base is. */
2606 const char *name;
2607
2608 disallow_got32:
2609 if (h == NULL || h->root.root.string == NULL)
2610 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2611 NULL);
2612 else
2613 name = h->root.root.string;
2614
2615 _bfd_error_handler
2616 /* xgettext:c-format */
2617 (_("%pB: direct GOT relocation %s against `%s'"
2618 " without base register can not be used"
2619 " when making a shared object"),
2620 input_bfd, howto->name, name);
2621 bfd_set_error (bfd_error_bad_value);
2622 return FALSE;
2623 }
2624 }
2625 else
2626 {
2627 /* Subtract the .got.plt section address only with a base
2628 register. */
2629 relocation -= (htab->elf.sgotplt->output_section->vma
2630 + htab->elf.sgotplt->output_offset);
2631 }
2632
2633 break;
2634
2635 case R_386_GOTOFF:
2636 /* Relocation is relative to the start of the global offset
2637 table. */
2638
2639 /* Check to make sure it isn't a protected function or data
2640 symbol for shared library since it may not be local when
2641 used as function address or with copy relocation. We also
2642 need to make sure that a symbol is referenced locally. */
2643 if (!bfd_link_executable (info) && h)
2644 {
2645 if (!h->def_regular)
2646 {
2647 const char *v;
2648
2649 switch (ELF_ST_VISIBILITY (h->other))
2650 {
2651 case STV_HIDDEN:
2652 v = _("hidden symbol");
2653 break;
2654 case STV_INTERNAL:
2655 v = _("internal symbol");
2656 break;
2657 case STV_PROTECTED:
2658 v = _("protected symbol");
2659 break;
2660 default:
2661 v = _("symbol");
2662 break;
2663 }
2664
2665 _bfd_error_handler
2666 /* xgettext:c-format */
2667 (_("%pB: relocation R_386_GOTOFF against undefined %s"
2668 " `%s' can not be used when making a shared object"),
2669 input_bfd, v, h->root.root.string);
2670 bfd_set_error (bfd_error_bad_value);
2671 return FALSE;
2672 }
2673 else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
2674 && (h->type == STT_FUNC
2675 || h->type == STT_OBJECT)
2676 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2677 {
2678 _bfd_error_handler
2679 /* xgettext:c-format */
2680 (_("%pB: relocation R_386_GOTOFF against protected %s"
2681 " `%s' can not be used when making a shared object"),
2682 input_bfd,
2683 h->type == STT_FUNC ? "function" : "data",
2684 h->root.root.string);
2685 bfd_set_error (bfd_error_bad_value);
2686 return FALSE;
2687 }
2688 }
2689
2690 /* Note that sgot is not involved in this
2691 calculation. We always want the start of .got.plt. If we
2692 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2693 permitted by the ABI, we might have to change this
2694 calculation. */
2695 relocation -= htab->elf.sgotplt->output_section->vma
2696 + htab->elf.sgotplt->output_offset;
2697 break;
2698
2699 case R_386_GOTPC:
2700 /* Use global offset table as symbol value. */
2701 relocation = htab->elf.sgotplt->output_section->vma
2702 + htab->elf.sgotplt->output_offset;
2703 unresolved_reloc = FALSE;
2704 break;
2705
2706 case R_386_PLT32:
2707 /* Relocation is to the entry for this symbol in the
2708 procedure linkage table. */
2709
2710 /* Resolve a PLT32 reloc against a local symbol directly,
2711 without using the procedure linkage table. */
2712 if (h == NULL)
2713 break;
2714
2715 if ((h->plt.offset == (bfd_vma) -1
2716 && eh->plt_got.offset == (bfd_vma) -1)
2717 || htab->elf.splt == NULL)
2718 {
2719 /* We didn't make a PLT entry for this symbol. This
2720 happens when statically linking PIC code, or when
2721 using -Bsymbolic. */
2722 break;
2723 }
2724
2725 if (h->plt.offset != (bfd_vma) -1)
2726 {
2727 if (htab->plt_second != NULL)
2728 {
2729 resolved_plt = htab->plt_second;
2730 plt_offset = eh->plt_second.offset;
2731 }
2732 else
2733 {
2734 resolved_plt = htab->elf.splt;
2735 plt_offset = h->plt.offset;
2736 }
2737 }
2738 else
2739 {
2740 resolved_plt = htab->plt_got;
2741 plt_offset = eh->plt_got.offset;
2742 }
2743
2744 relocation = (resolved_plt->output_section->vma
2745 + resolved_plt->output_offset
2746 + plt_offset);
2747 unresolved_reloc = FALSE;
2748 break;
2749
2750 case R_386_SIZE32:
2751 /* Set to symbol size. */
2752 relocation = st_size;
2753 /* Fall through. */
2754
2755 case R_386_32:
2756 case R_386_PC32:
2757 if ((input_section->flags & SEC_ALLOC) == 0
2758 || is_vxworks_tls)
2759 break;
2760
2761 if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type,
2762 FALSE, resolved_to_zero,
2763 (r_type == R_386_PC32)))
2764 {
2765 Elf_Internal_Rela outrel;
2766 bfd_boolean skip, relocate;
2767 asection *sreloc;
2768
2769 /* When generating a shared object, these relocations
2770 are copied into the output file to be resolved at run
2771 time. */
2772
2773 skip = FALSE;
2774 relocate = FALSE;
2775
2776 outrel.r_offset =
2777 _bfd_elf_section_offset (output_bfd, info, input_section,
2778 rel->r_offset);
2779 if (outrel.r_offset == (bfd_vma) -1)
2780 skip = TRUE;
2781 else if (outrel.r_offset == (bfd_vma) -2)
2782 skip = TRUE, relocate = TRUE;
2783 outrel.r_offset += (input_section->output_section->vma
2784 + input_section->output_offset);
2785
2786 if (skip)
2787 memset (&outrel, 0, sizeof outrel);
2788 else if (COPY_INPUT_RELOC_P (info, h, r_type))
2789 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2790 else
2791 {
2792 /* This symbol is local, or marked to become local. */
2793 relocate = TRUE;
2794 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2795 }
2796
2797 sreloc = elf_section_data (input_section)->sreloc;
2798
2799 if (sreloc == NULL || sreloc->contents == NULL)
2800 {
2801 r = bfd_reloc_notsupported;
2802 goto check_relocation_error;
2803 }
2804
2805 elf_append_rel (output_bfd, sreloc, &outrel);
2806
2807 /* If this reloc is against an external symbol, we do
2808 not want to fiddle with the addend. Otherwise, we
2809 need to include the symbol value so that it becomes
2810 an addend for the dynamic reloc. */
2811 if (! relocate)
2812 continue;
2813 }
2814 break;
2815
2816 case R_386_TLS_IE:
2817 if (!bfd_link_executable (info))
2818 {
2819 Elf_Internal_Rela outrel;
2820 asection *sreloc;
2821
2822 outrel.r_offset = rel->r_offset
2823 + input_section->output_section->vma
2824 + input_section->output_offset;
2825 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2826 sreloc = elf_section_data (input_section)->sreloc;
2827 if (sreloc == NULL)
2828 abort ();
2829 elf_append_rel (output_bfd, sreloc, &outrel);
2830 }
2831 /* Fall through */
2832
2833 case R_386_TLS_GD:
2834 case R_386_TLS_GOTDESC:
2835 case R_386_TLS_DESC_CALL:
2836 case R_386_TLS_IE_32:
2837 case R_386_TLS_GOTIE:
2838 tls_type = GOT_UNKNOWN;
2839 if (h == NULL && local_got_offsets)
2840 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
2841 else if (h != NULL)
2842 tls_type = elf_x86_hash_entry(h)->tls_type;
2843 if (tls_type == GOT_TLS_IE)
2844 tls_type = GOT_TLS_IE_NEG;
2845
2846 r_type_tls = r_type;
2847 if (! elf_i386_tls_transition (info, input_bfd,
2848 input_section, contents,
2849 symtab_hdr, sym_hashes,
2850 &r_type_tls, tls_type, rel,
2851 relend, h, r_symndx, TRUE))
2852 return FALSE;
2853
2854 if (r_type_tls == R_386_TLS_LE_32)
2855 {
2856 BFD_ASSERT (! unresolved_reloc);
2857 if (r_type == R_386_TLS_GD)
2858 {
2859 unsigned int type;
2860 bfd_vma roff;
2861
2862 /* GD->LE transition. */
2863 type = *(contents + rel->r_offset - 2);
2864 if (type == 0x04)
2865 {
2866 /* Change
2867 leal foo@tlsgd(,%ebx,1), %eax
2868 call ___tls_get_addr@PLT
2869 into:
2870 movl %gs:0, %eax
2871 subl $foo@tpoff, %eax
2872 (6 byte form of subl). */
2873 roff = rel->r_offset + 5;
2874 }
2875 else
2876 {
2877 /* Change
2878 leal foo@tlsgd(%ebx), %eax
2879 call ___tls_get_addr@PLT
2880 nop
2881 or
2882 leal foo@tlsgd(%reg), %eax
2883 call *___tls_get_addr@GOT(%reg)
2884 which may be converted to
2885 addr32 call ___tls_get_addr
2886 into:
2887 movl %gs:0, %eax; subl $foo@tpoff, %eax
2888 (6 byte form of subl). */
2889 roff = rel->r_offset + 6;
2890 }
2891 memcpy (contents + roff - 8,
2892 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2893 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
2894 contents + roff);
2895 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
2896 rel++;
2897 wrel++;
2898 continue;
2899 }
2900 else if (r_type == R_386_TLS_GOTDESC)
2901 {
2902 /* GDesc -> LE transition.
2903 It's originally something like:
2904 leal x@tlsdesc(%ebx), %eax
2905
2906 leal x@ntpoff, %eax
2907
2908 Registers other than %eax may be set up here. */
2909
2910 unsigned int val;
2911 bfd_vma roff;
2912
2913 roff = rel->r_offset;
2914 val = bfd_get_8 (input_bfd, contents + roff - 1);
2915
2916 /* Now modify the instruction as appropriate. */
2917 /* aoliva FIXME: remove the above and xor the byte
2918 below with 0x86. */
2919 bfd_put_8 (output_bfd, val ^ 0x86,
2920 contents + roff - 1);
2921 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
2922 contents + roff);
2923 continue;
2924 }
2925 else if (r_type == R_386_TLS_DESC_CALL)
2926 {
2927 /* GDesc -> LE transition.
2928 It's originally:
2929 call *(%eax)
2930 Turn it into:
2931 xchg %ax,%ax */
2932
2933 bfd_vma roff;
2934
2935 roff = rel->r_offset;
2936 bfd_put_8 (output_bfd, 0x66, contents + roff);
2937 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2938 continue;
2939 }
2940 else if (r_type == R_386_TLS_IE)
2941 {
2942 unsigned int val;
2943
2944 /* IE->LE transition:
2945 Originally it can be one of:
2946 movl foo, %eax
2947 movl foo, %reg
2948 addl foo, %reg
2949 We change it into:
2950 movl $foo, %eax
2951 movl $foo, %reg
2952 addl $foo, %reg. */
2953 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2954 if (val == 0xa1)
2955 {
2956 /* movl foo, %eax. */
2957 bfd_put_8 (output_bfd, 0xb8,
2958 contents + rel->r_offset - 1);
2959 }
2960 else
2961 {
2962 unsigned int type;
2963
2964 type = bfd_get_8 (input_bfd,
2965 contents + rel->r_offset - 2);
2966 switch (type)
2967 {
2968 case 0x8b:
2969 /* movl */
2970 bfd_put_8 (output_bfd, 0xc7,
2971 contents + rel->r_offset - 2);
2972 bfd_put_8 (output_bfd,
2973 0xc0 | ((val >> 3) & 7),
2974 contents + rel->r_offset - 1);
2975 break;
2976 case 0x03:
2977 /* addl */
2978 bfd_put_8 (output_bfd, 0x81,
2979 contents + rel->r_offset - 2);
2980 bfd_put_8 (output_bfd,
2981 0xc0 | ((val >> 3) & 7),
2982 contents + rel->r_offset - 1);
2983 break;
2984 default:
2985 BFD_FAIL ();
2986 break;
2987 }
2988 }
2989 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
2990 contents + rel->r_offset);
2991 continue;
2992 }
2993 else
2994 {
2995 unsigned int val, type;
2996
2997 /* {IE_32,GOTIE}->LE transition:
2998 Originally it can be one of:
2999 subl foo(%reg1), %reg2
3000 movl foo(%reg1), %reg2
3001 addl foo(%reg1), %reg2
3002 We change it into:
3003 subl $foo, %reg2
3004 movl $foo, %reg2 (6 byte form)
3005 addl $foo, %reg2. */
3006 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3007 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3008 if (type == 0x8b)
3009 {
3010 /* movl */
3011 bfd_put_8 (output_bfd, 0xc7,
3012 contents + rel->r_offset - 2);
3013 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3014 contents + rel->r_offset - 1);
3015 }
3016 else if (type == 0x2b)
3017 {
3018 /* subl */
3019 bfd_put_8 (output_bfd, 0x81,
3020 contents + rel->r_offset - 2);
3021 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3022 contents + rel->r_offset - 1);
3023 }
3024 else if (type == 0x03)
3025 {
3026 /* addl */
3027 bfd_put_8 (output_bfd, 0x81,
3028 contents + rel->r_offset - 2);
3029 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3030 contents + rel->r_offset - 1);
3031 }
3032 else
3033 BFD_FAIL ();
3034 if (r_type == R_386_TLS_GOTIE)
3035 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3036 contents + rel->r_offset);
3037 else
3038 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3039 contents + rel->r_offset);
3040 continue;
3041 }
3042 }
3043
3044 if (htab->elf.sgot == NULL)
3045 abort ();
3046
3047 if (h != NULL)
3048 {
3049 off = h->got.offset;
3050 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
3051 }
3052 else
3053 {
3054 if (local_got_offsets == NULL)
3055 abort ();
3056
3057 off = local_got_offsets[r_symndx];
3058 offplt = local_tlsdesc_gotents[r_symndx];
3059 }
3060
3061 if ((off & 1) != 0)
3062 off &= ~1;
3063 else
3064 {
3065 Elf_Internal_Rela outrel;
3066 int dr_type;
3067 asection *sreloc;
3068
3069 if (htab->elf.srelgot == NULL)
3070 abort ();
3071
3072 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3073
3074 if (GOT_TLS_GDESC_P (tls_type))
3075 {
3076 bfd_byte *loc;
3077 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3078 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3079 <= htab->elf.sgotplt->size);
3080 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3081 + htab->elf.sgotplt->output_offset
3082 + offplt
3083 + htab->sgotplt_jump_table_size);
3084 sreloc = htab->elf.srelplt;
3085 loc = sreloc->contents;
3086 loc += (htab->next_tls_desc_index++
3087 * sizeof (Elf32_External_Rel));
3088 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3089 <= sreloc->contents + sreloc->size);
3090 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3091 if (indx == 0)
3092 {
3093 BFD_ASSERT (! unresolved_reloc);
3094 bfd_put_32 (output_bfd,
3095 relocation - _bfd_x86_elf_dtpoff_base (info),
3096 htab->elf.sgotplt->contents + offplt
3097 + htab->sgotplt_jump_table_size + 4);
3098 }
3099 else
3100 {
3101 bfd_put_32 (output_bfd, 0,
3102 htab->elf.sgotplt->contents + offplt
3103 + htab->sgotplt_jump_table_size + 4);
3104 }
3105 }
3106
3107 sreloc = htab->elf.srelgot;
3108
3109 outrel.r_offset = (htab->elf.sgot->output_section->vma
3110 + htab->elf.sgot->output_offset + off);
3111
3112 if (GOT_TLS_GD_P (tls_type))
3113 dr_type = R_386_TLS_DTPMOD32;
3114 else if (GOT_TLS_GDESC_P (tls_type))
3115 goto dr_done;
3116 else if (tls_type == GOT_TLS_IE_POS)
3117 dr_type = R_386_TLS_TPOFF;
3118 else
3119 dr_type = R_386_TLS_TPOFF32;
3120
3121 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3122 bfd_put_32 (output_bfd,
3123 relocation - _bfd_x86_elf_dtpoff_base (info),
3124 htab->elf.sgot->contents + off);
3125 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3126 bfd_put_32 (output_bfd,
3127 _bfd_x86_elf_dtpoff_base (info) - relocation,
3128 htab->elf.sgot->contents + off);
3129 else if (dr_type != R_386_TLS_DESC)
3130 bfd_put_32 (output_bfd, 0,
3131 htab->elf.sgot->contents + off);
3132 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3133
3134 elf_append_rel (output_bfd, sreloc, &outrel);
3135
3136 if (GOT_TLS_GD_P (tls_type))
3137 {
3138 if (indx == 0)
3139 {
3140 BFD_ASSERT (! unresolved_reloc);
3141 bfd_put_32 (output_bfd,
3142 relocation - _bfd_x86_elf_dtpoff_base (info),
3143 htab->elf.sgot->contents + off + 4);
3144 }
3145 else
3146 {
3147 bfd_put_32 (output_bfd, 0,
3148 htab->elf.sgot->contents + off + 4);
3149 outrel.r_info = ELF32_R_INFO (indx,
3150 R_386_TLS_DTPOFF32);
3151 outrel.r_offset += 4;
3152 elf_append_rel (output_bfd, sreloc, &outrel);
3153 }
3154 }
3155 else if (tls_type == GOT_TLS_IE_BOTH)
3156 {
3157 bfd_put_32 (output_bfd,
3158 (indx == 0
3159 ? relocation - _bfd_x86_elf_dtpoff_base (info)
3160 : 0),
3161 htab->elf.sgot->contents + off + 4);
3162 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3163 outrel.r_offset += 4;
3164 elf_append_rel (output_bfd, sreloc, &outrel);
3165 }
3166
3167 dr_done:
3168 if (h != NULL)
3169 h->got.offset |= 1;
3170 else
3171 local_got_offsets[r_symndx] |= 1;
3172 }
3173
3174 if (off >= (bfd_vma) -2
3175 && ! GOT_TLS_GDESC_P (tls_type))
3176 abort ();
3177 if (r_type_tls == R_386_TLS_GOTDESC
3178 || r_type_tls == R_386_TLS_DESC_CALL)
3179 {
3180 relocation = htab->sgotplt_jump_table_size + offplt;
3181 unresolved_reloc = FALSE;
3182 }
3183 else if (r_type_tls == r_type)
3184 {
3185 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3186 + htab->elf.sgotplt->output_offset;
3187 relocation = htab->elf.sgot->output_section->vma
3188 + htab->elf.sgot->output_offset + off - g_o_t;
3189 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3190 && tls_type == GOT_TLS_IE_BOTH)
3191 relocation += 4;
3192 if (r_type == R_386_TLS_IE)
3193 relocation += g_o_t;
3194 unresolved_reloc = FALSE;
3195 }
3196 else if (r_type == R_386_TLS_GD)
3197 {
3198 unsigned int val, type;
3199 bfd_vma roff;
3200
3201 /* GD->IE transition. */
3202 type = *(contents + rel->r_offset - 2);
3203 val = *(contents + rel->r_offset - 1);
3204 if (type == 0x04)
3205 {
3206 /* Change
3207 leal foo@tlsgd(,%ebx,1), %eax
3208 call ___tls_get_addr@PLT
3209 into:
3210 movl %gs:0, %eax
3211 subl $foo@gottpoff(%ebx), %eax. */
3212 val >>= 3;
3213 roff = rel->r_offset - 3;
3214 }
3215 else
3216 {
3217 /* Change
3218 leal foo@tlsgd(%ebx), %eax
3219 call ___tls_get_addr@PLT
3220 nop
3221 or
3222 leal foo@tlsgd(%reg), %eax
3223 call *___tls_get_addr@GOT(%reg)
3224 which may be converted to
3225 addr32 call ___tls_get_addr
3226 into:
3227 movl %gs:0, %eax;
3228 subl $foo@gottpoff(%reg), %eax. */
3229 roff = rel->r_offset - 2;
3230 }
3231 memcpy (contents + roff,
3232 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3233 contents[roff + 7] = 0x80 | (val & 7);
3234 /* If foo is used only with foo@gotntpoff(%reg) and
3235 foo@indntpoff, but not with foo@gottpoff(%reg), change
3236 subl $foo@gottpoff(%reg), %eax
3237 into:
3238 addl $foo@gotntpoff(%reg), %eax. */
3239 if (tls_type == GOT_TLS_IE_POS)
3240 contents[roff + 6] = 0x03;
3241 bfd_put_32 (output_bfd,
3242 htab->elf.sgot->output_section->vma
3243 + htab->elf.sgot->output_offset + off
3244 - htab->elf.sgotplt->output_section->vma
3245 - htab->elf.sgotplt->output_offset,
3246 contents + roff + 8);
3247 /* Skip R_386_PLT32 and R_386_GOT32X. */
3248 rel++;
3249 wrel++;
3250 continue;
3251 }
3252 else if (r_type == R_386_TLS_GOTDESC)
3253 {
3254 /* GDesc -> IE transition.
3255 It's originally something like:
3256 leal x@tlsdesc(%ebx), %eax
3257
3258 Change it to:
3259 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3260 or:
3261 movl x@gottpoff(%ebx), %eax # before negl %eax
3262
3263 Registers other than %eax may be set up here. */
3264
3265 bfd_vma roff;
3266
3267 /* First, make sure it's a leal adding ebx to a 32-bit
3268 offset into any register, although it's probably
3269 almost always going to be eax. */
3270 roff = rel->r_offset;
3271
3272 /* Now modify the instruction as appropriate. */
3273 /* To turn a leal into a movl in the form we use it, it
3274 suffices to change the first byte from 0x8d to 0x8b.
3275 aoliva FIXME: should we decide to keep the leal, all
3276 we have to do is remove the statement below, and
3277 adjust the relaxation of R_386_TLS_DESC_CALL. */
3278 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3279
3280 if (tls_type == GOT_TLS_IE_BOTH)
3281 off += 4;
3282
3283 bfd_put_32 (output_bfd,
3284 htab->elf.sgot->output_section->vma
3285 + htab->elf.sgot->output_offset + off
3286 - htab->elf.sgotplt->output_section->vma
3287 - htab->elf.sgotplt->output_offset,
3288 contents + roff);
3289 continue;
3290 }
3291 else if (r_type == R_386_TLS_DESC_CALL)
3292 {
3293 /* GDesc -> IE transition.
3294 It's originally:
3295 call *(%eax)
3296
3297 Change it to:
3298 xchg %ax,%ax
3299 or
3300 negl %eax
3301 depending on how we transformed the TLS_GOTDESC above.
3302 */
3303
3304 bfd_vma roff;
3305
3306 roff = rel->r_offset;
3307
3308 /* Now modify the instruction as appropriate. */
3309 if (tls_type != GOT_TLS_IE_NEG)
3310 {
3311 /* xchg %ax,%ax */
3312 bfd_put_8 (output_bfd, 0x66, contents + roff);
3313 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3314 }
3315 else
3316 {
3317 /* negl %eax */
3318 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3319 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3320 }
3321
3322 continue;
3323 }
3324 else
3325 BFD_ASSERT (FALSE);
3326 break;
3327
3328 case R_386_TLS_LDM:
3329 if (! elf_i386_tls_transition (info, input_bfd,
3330 input_section, contents,
3331 symtab_hdr, sym_hashes,
3332 &r_type, GOT_UNKNOWN, rel,
3333 relend, h, r_symndx, TRUE))
3334 return FALSE;
3335
3336 if (r_type != R_386_TLS_LDM)
3337 {
3338 /* LD->LE transition. Change
3339 leal foo@tlsldm(%ebx) %eax
3340 call ___tls_get_addr@PLT
3341 into:
3342 movl %gs:0, %eax
3343 nop
3344 leal 0(%esi,1), %esi
3345 or change
3346 leal foo@tlsldm(%reg) %eax
3347 call *___tls_get_addr@GOT(%reg)
3348 which may be converted to
3349 addr32 call ___tls_get_addr
3350 into:
3351 movl %gs:0, %eax
3352 leal 0(%esi), %esi */
3353 BFD_ASSERT (r_type == R_386_TLS_LE_32);
3354 if (*(contents + rel->r_offset + 4) == 0xff
3355 || *(contents + rel->r_offset + 4) == 0x67)
3356 memcpy (contents + rel->r_offset - 2,
3357 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3358 else
3359 memcpy (contents + rel->r_offset - 2,
3360 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3361 /* Skip R_386_PC32/R_386_PLT32. */
3362 rel++;
3363 wrel++;
3364 continue;
3365 }
3366
3367 if (htab->elf.sgot == NULL)
3368 abort ();
3369
3370 off = htab->tls_ld_or_ldm_got.offset;
3371 if (off & 1)
3372 off &= ~1;
3373 else
3374 {
3375 Elf_Internal_Rela outrel;
3376
3377 if (htab->elf.srelgot == NULL)
3378 abort ();
3379
3380 outrel.r_offset = (htab->elf.sgot->output_section->vma
3381 + htab->elf.sgot->output_offset + off);
3382
3383 bfd_put_32 (output_bfd, 0,
3384 htab->elf.sgot->contents + off);
3385 bfd_put_32 (output_bfd, 0,
3386 htab->elf.sgot->contents + off + 4);
3387 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3388 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
3389 htab->tls_ld_or_ldm_got.offset |= 1;
3390 }
3391 relocation = htab->elf.sgot->output_section->vma
3392 + htab->elf.sgot->output_offset + off
3393 - htab->elf.sgotplt->output_section->vma
3394 - htab->elf.sgotplt->output_offset;
3395 unresolved_reloc = FALSE;
3396 break;
3397
3398 case R_386_TLS_LDO_32:
3399 if (!bfd_link_executable (info)
3400 || (input_section->flags & SEC_CODE) == 0)
3401 relocation -= _bfd_x86_elf_dtpoff_base (info);
3402 else
3403 /* When converting LDO to LE, we must negate. */
3404 relocation = -elf_i386_tpoff (info, relocation);
3405 break;
3406
3407 case R_386_TLS_LE_32:
3408 case R_386_TLS_LE:
3409 if (!bfd_link_executable (info))
3410 {
3411 Elf_Internal_Rela outrel;
3412 asection *sreloc;
3413
3414 outrel.r_offset = rel->r_offset
3415 + input_section->output_section->vma
3416 + input_section->output_offset;
3417 if (h != NULL && h->dynindx != -1)
3418 indx = h->dynindx;
3419 else
3420 indx = 0;
3421 if (r_type == R_386_TLS_LE_32)
3422 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3423 else
3424 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3425 sreloc = elf_section_data (input_section)->sreloc;
3426 if (sreloc == NULL)
3427 abort ();
3428 elf_append_rel (output_bfd, sreloc, &outrel);
3429 if (indx)
3430 continue;
3431 else if (r_type == R_386_TLS_LE_32)
3432 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
3433 else
3434 relocation -= _bfd_x86_elf_dtpoff_base (info);
3435 }
3436 else if (r_type == R_386_TLS_LE_32)
3437 relocation = elf_i386_tpoff (info, relocation);
3438 else
3439 relocation = -elf_i386_tpoff (info, relocation);
3440 break;
3441
3442 default:
3443 break;
3444 }
3445
3446 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3447 because such sections are not SEC_ALLOC and thus ld.so will
3448 not process them. */
3449 if (unresolved_reloc
3450 && !((input_section->flags & SEC_DEBUGGING) != 0
3451 && h->def_dynamic)
3452 && _bfd_elf_section_offset (output_bfd, info, input_section,
3453 rel->r_offset) != (bfd_vma) -1)
3454 {
3455 _bfd_error_handler
3456 /* xgettext:c-format */
3457 (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
3458 input_bfd,
3459 input_section,
3460 (uint64_t) rel->r_offset,
3461 howto->name,
3462 h->root.root.string);
3463 return FALSE;
3464 }
3465
3466 do_relocation:
3467 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3468 contents, rel->r_offset,
3469 relocation, 0);
3470
3471 check_relocation_error:
3472 if (r != bfd_reloc_ok)
3473 {
3474 const char *name;
3475
3476 if (h != NULL)
3477 name = h->root.root.string;
3478 else
3479 {
3480 name = bfd_elf_string_from_elf_section (input_bfd,
3481 symtab_hdr->sh_link,
3482 sym->st_name);
3483 if (name == NULL)
3484 return FALSE;
3485 if (*name == '\0')
3486 name = bfd_section_name (input_bfd, sec);
3487 }
3488
3489 if (r == bfd_reloc_overflow)
3490 (*info->callbacks->reloc_overflow)
3491 (info, (h ? &h->root : NULL), name, howto->name,
3492 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3493 else
3494 {
3495 _bfd_error_handler
3496 /* xgettext:c-format */
3497 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3498 input_bfd, input_section,
3499 (uint64_t) rel->r_offset, name, (int) r);
3500 return FALSE;
3501 }
3502 }
3503
3504 if (wrel != rel)
3505 *wrel = *rel;
3506 }
3507
3508 if (wrel != rel)
3509 {
3510 Elf_Internal_Shdr *rel_hdr;
3511 size_t deleted = rel - wrel;
3512
3513 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3514 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3515 if (rel_hdr->sh_size == 0)
3516 {
3517 /* It is too late to remove an empty reloc section. Leave
3518 one NONE reloc.
3519 ??? What is wrong with an empty section??? */
3520 rel_hdr->sh_size = rel_hdr->sh_entsize;
3521 deleted -= 1;
3522 }
3523 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3524 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3525 input_section->reloc_count -= deleted;
3526 }
3527
3528 return TRUE;
3529 }
3530
3531 /* Finish up dynamic symbol handling. We set the contents of various
3532 dynamic sections here. */
3533
3534 static bfd_boolean
3535 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3536 struct bfd_link_info *info,
3537 struct elf_link_hash_entry *h,
3538 Elf_Internal_Sym *sym)
3539 {
3540 struct elf_x86_link_hash_table *htab;
3541 unsigned plt_entry_size;
3542 struct elf_x86_link_hash_entry *eh;
3543 bfd_boolean local_undefweak;
3544 bfd_boolean use_plt_second;
3545
3546 htab = elf_x86_hash_table (info, I386_ELF_DATA);
3547 if (htab == NULL)
3548 return FALSE;
3549
3550 plt_entry_size = htab->plt.plt_entry_size;
3551
3552 /* Use the second PLT section only if there is .plt section. */
3553 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3554
3555 eh = (struct elf_x86_link_hash_entry *) h;
3556 if (eh->no_finish_dynamic_symbol)
3557 abort ();
3558
3559 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3560 resolved undefined weak symbols in executable so that their
3561 references have value 0 at run-time. */
3562 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
3563
3564 if (h->plt.offset != (bfd_vma) -1)
3565 {
3566 bfd_vma plt_index, plt_offset;
3567 bfd_vma got_offset;
3568 Elf_Internal_Rela rel;
3569 bfd_byte *loc;
3570 asection *plt, *resolved_plt, *gotplt, *relplt;
3571
3572 /* When building a static executable, use .iplt, .igot.plt and
3573 .rel.iplt sections for STT_GNU_IFUNC symbols. */
3574 if (htab->elf.splt != NULL)
3575 {
3576 plt = htab->elf.splt;
3577 gotplt = htab->elf.sgotplt;
3578 relplt = htab->elf.srelplt;
3579 }
3580 else
3581 {
3582 plt = htab->elf.iplt;
3583 gotplt = htab->elf.igotplt;
3584 relplt = htab->elf.irelplt;
3585 }
3586
3587 VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
3588
3589 /* Get the index in the procedure linkage table which
3590 corresponds to this symbol. This is the index of this symbol
3591 in all the symbols for which we are making plt entries. The
3592 first entry in the procedure linkage table is reserved.
3593
3594 Get the offset into the .got table of the entry that
3595 corresponds to this function. Each .got entry is 4 bytes.
3596 The first three are reserved.
3597
3598 For static executables, we don't reserve anything. */
3599
3600 if (plt == htab->elf.splt)
3601 {
3602 got_offset = (h->plt.offset / plt_entry_size
3603 - htab->plt.has_plt0);
3604 got_offset = (got_offset + 3) * 4;
3605 }
3606 else
3607 {
3608 got_offset = h->plt.offset / plt_entry_size;
3609 got_offset = got_offset * 4;
3610 }
3611
3612 /* Fill in the entry in the procedure linkage table and update
3613 the first slot. */
3614 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
3615 plt_entry_size);
3616
3617 if (use_plt_second)
3618 {
3619 const bfd_byte *plt_entry;
3620 if (bfd_link_pic (info))
3621 plt_entry = htab->non_lazy_plt->pic_plt_entry;
3622 else
3623 plt_entry = htab->non_lazy_plt->plt_entry;
3624 memcpy (htab->plt_second->contents + eh->plt_second.offset,
3625 plt_entry, htab->non_lazy_plt->plt_entry_size);
3626
3627 resolved_plt = htab->plt_second;
3628 plt_offset = eh->plt_second.offset;
3629 }
3630 else
3631 {
3632 resolved_plt = plt;
3633 plt_offset = h->plt.offset;
3634 }
3635
3636 if (! bfd_link_pic (info))
3637 {
3638 bfd_put_32 (output_bfd,
3639 (gotplt->output_section->vma
3640 + gotplt->output_offset
3641 + got_offset),
3642 resolved_plt->contents + plt_offset
3643 + htab->plt.plt_got_offset);
3644
3645 if (htab->target_os == is_vxworks)
3646 {
3647 int s, k, reloc_index;
3648
3649 /* Create the R_386_32 relocation referencing the GOT
3650 for this PLT entry. */
3651
3652 /* S: Current slot number (zero-based). */
3653 s = ((h->plt.offset - htab->plt.plt_entry_size)
3654 / htab->plt.plt_entry_size);
3655 /* K: Number of relocations for PLTResolve. */
3656 if (bfd_link_pic (info))
3657 k = PLTRESOLVE_RELOCS_SHLIB;
3658 else
3659 k = PLTRESOLVE_RELOCS;
3660 /* Skip the PLTresolve relocations, and the relocations for
3661 the other PLT slots. */
3662 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3663 loc = (htab->srelplt2->contents + reloc_index
3664 * sizeof (Elf32_External_Rel));
3665
3666 rel.r_offset = (plt->output_section->vma
3667 + plt->output_offset
3668 + h->plt.offset + 2),
3669 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3670 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3671
3672 /* Create the R_386_32 relocation referencing the beginning of
3673 the PLT for this GOT entry. */
3674 rel.r_offset = (htab->elf.sgotplt->output_section->vma
3675 + htab->elf.sgotplt->output_offset
3676 + got_offset);
3677 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3678 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3679 loc + sizeof (Elf32_External_Rel));
3680 }
3681 }
3682 else
3683 {
3684 bfd_put_32 (output_bfd, got_offset,
3685 resolved_plt->contents + plt_offset
3686 + htab->plt.plt_got_offset);
3687 }
3688
3689 /* Fill in the entry in the global offset table. Leave the entry
3690 as zero for undefined weak symbol in PIE. No PLT relocation
3691 against undefined weak symbol in PIE. */
3692 if (!local_undefweak)
3693 {
3694 if (htab->plt.has_plt0)
3695 bfd_put_32 (output_bfd,
3696 (plt->output_section->vma
3697 + plt->output_offset
3698 + h->plt.offset
3699 + htab->lazy_plt->plt_lazy_offset),
3700 gotplt->contents + got_offset);
3701
3702 /* Fill in the entry in the .rel.plt section. */
3703 rel.r_offset = (gotplt->output_section->vma
3704 + gotplt->output_offset
3705 + got_offset);
3706 if (PLT_LOCAL_IFUNC_P (info, h))
3707 {
3708 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3709 h->root.root.string,
3710 h->root.u.def.section->owner);
3711
3712 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3713 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3714 in the .got.plt section. */
3715 bfd_put_32 (output_bfd,
3716 (h->root.u.def.value
3717 + h->root.u.def.section->output_section->vma
3718 + h->root.u.def.section->output_offset),
3719 gotplt->contents + got_offset);
3720 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3721 /* R_386_IRELATIVE comes last. */
3722 plt_index = htab->next_irelative_index--;
3723 }
3724 else
3725 {
3726 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3727 plt_index = htab->next_jump_slot_index++;
3728 }
3729
3730 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3731 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3732
3733 /* Don't fill the second and third slots in PLT entry for
3734 static executables nor without PLT0. */
3735 if (plt == htab->elf.splt && htab->plt.has_plt0)
3736 {
3737 bfd_put_32 (output_bfd,
3738 plt_index * sizeof (Elf32_External_Rel),
3739 plt->contents + h->plt.offset
3740 + htab->lazy_plt->plt_reloc_offset);
3741 bfd_put_32 (output_bfd,
3742 - (h->plt.offset
3743 + htab->lazy_plt->plt_plt_offset + 4),
3744 (plt->contents + h->plt.offset
3745 + htab->lazy_plt->plt_plt_offset));
3746 }
3747 }
3748 }
3749 else if (eh->plt_got.offset != (bfd_vma) -1)
3750 {
3751 bfd_vma got_offset, plt_offset;
3752 asection *plt, *got, *gotplt;
3753 const bfd_byte *got_plt_entry;
3754
3755 /* Set the entry in the GOT procedure linkage table. */
3756 plt = htab->plt_got;
3757 got = htab->elf.sgot;
3758 gotplt = htab->elf.sgotplt;
3759 got_offset = h->got.offset;
3760
3761 if (got_offset == (bfd_vma) -1
3762 || plt == NULL
3763 || got == NULL
3764 || gotplt == NULL)
3765 abort ();
3766
3767 /* Fill in the entry in the GOT procedure linkage table. */
3768 if (! bfd_link_pic (info))
3769 {
3770 got_plt_entry = htab->non_lazy_plt->plt_entry;
3771 got_offset += got->output_section->vma + got->output_offset;
3772 }
3773 else
3774 {
3775 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
3776 got_offset += (got->output_section->vma
3777 + got->output_offset
3778 - gotplt->output_section->vma
3779 - gotplt->output_offset);
3780 }
3781
3782 plt_offset = eh->plt_got.offset;
3783 memcpy (plt->contents + plt_offset, got_plt_entry,
3784 htab->non_lazy_plt->plt_entry_size);
3785 bfd_put_32 (output_bfd, got_offset,
3786 (plt->contents + plt_offset
3787 + htab->non_lazy_plt->plt_got_offset));
3788 }
3789
3790 if (!local_undefweak
3791 && !h->def_regular
3792 && (h->plt.offset != (bfd_vma) -1
3793 || eh->plt_got.offset != (bfd_vma) -1))
3794 {
3795 /* Mark the symbol as undefined, rather than as defined in
3796 the .plt section. Leave the value if there were any
3797 relocations where pointer equality matters (this is a clue
3798 for the dynamic linker, to make function pointer
3799 comparisons work between an application and shared
3800 library), otherwise set it to zero. If a function is only
3801 called from a binary, there is no need to slow down
3802 shared libraries because of that. */
3803 sym->st_shndx = SHN_UNDEF;
3804 if (!h->pointer_equality_needed)
3805 sym->st_value = 0;
3806 }
3807
3808 /* Don't generate dynamic GOT relocation against undefined weak
3809 symbol in executable. */
3810 if (h->got.offset != (bfd_vma) -1
3811 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3812 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
3813 && !local_undefweak)
3814 {
3815 Elf_Internal_Rela rel;
3816 asection *relgot = htab->elf.srelgot;
3817
3818 /* This symbol has an entry in the global offset table. Set it
3819 up. */
3820
3821 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3822 abort ();
3823
3824 rel.r_offset = (htab->elf.sgot->output_section->vma
3825 + htab->elf.sgot->output_offset
3826 + (h->got.offset & ~(bfd_vma) 1));
3827
3828 /* If this is a static link, or it is a -Bsymbolic link and the
3829 symbol is defined locally or was forced to be local because
3830 of a version file, we just want to emit a RELATIVE reloc.
3831 The entry in the global offset table will already have been
3832 initialized in the relocate_section function. */
3833 if (h->def_regular
3834 && h->type == STT_GNU_IFUNC)
3835 {
3836 if (h->plt.offset == (bfd_vma) -1)
3837 {
3838 /* STT_GNU_IFUNC is referenced without PLT. */
3839 if (htab->elf.splt == NULL)
3840 {
3841 /* use .rel[a].iplt section to store .got relocations
3842 in static executable. */
3843 relgot = htab->elf.irelplt;
3844 }
3845 if (SYMBOL_REFERENCES_LOCAL_P (info, h))
3846 {
3847 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3848 h->root.root.string,
3849 h->root.u.def.section->owner);
3850
3851 bfd_put_32 (output_bfd,
3852 (h->root.u.def.value
3853 + h->root.u.def.section->output_section->vma
3854 + h->root.u.def.section->output_offset),
3855 htab->elf.sgot->contents + h->got.offset);
3856 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3857 }
3858 else
3859 goto do_glob_dat;
3860 }
3861 else if (bfd_link_pic (info))
3862 {
3863 /* Generate R_386_GLOB_DAT. */
3864 goto do_glob_dat;
3865 }
3866 else
3867 {
3868 asection *plt;
3869 bfd_vma plt_offset;
3870
3871 if (!h->pointer_equality_needed)
3872 abort ();
3873
3874 /* For non-shared object, we can't use .got.plt, which
3875 contains the real function addres if we need pointer
3876 equality. We load the GOT entry with the PLT entry. */
3877 if (htab->plt_second != NULL)
3878 {
3879 plt = htab->plt_second;
3880 plt_offset = eh->plt_second.offset;
3881 }
3882 else
3883 {
3884 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3885 plt_offset = h->plt.offset;
3886 }
3887 bfd_put_32 (output_bfd,
3888 (plt->output_section->vma
3889 + plt->output_offset + plt_offset),
3890 htab->elf.sgot->contents + h->got.offset);
3891 return TRUE;
3892 }
3893 }
3894 else if (bfd_link_pic (info)
3895 && SYMBOL_REFERENCES_LOCAL_P (info, h))
3896 {
3897 BFD_ASSERT((h->got.offset & 1) != 0);
3898 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3899 }
3900 else
3901 {
3902 BFD_ASSERT((h->got.offset & 1) == 0);
3903 do_glob_dat:
3904 bfd_put_32 (output_bfd, (bfd_vma) 0,
3905 htab->elf.sgot->contents + h->got.offset);
3906 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3907 }
3908
3909 elf_append_rel (output_bfd, relgot, &rel);
3910 }
3911
3912 if (h->needs_copy)
3913 {
3914 Elf_Internal_Rela rel;
3915 asection *s;
3916
3917 /* This symbol needs a copy reloc. Set it up. */
3918 VERIFY_COPY_RELOC (h, htab)
3919
3920 rel.r_offset = (h->root.u.def.value
3921 + h->root.u.def.section->output_section->vma
3922 + h->root.u.def.section->output_offset);
3923 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3924 if (h->root.u.def.section == htab->elf.sdynrelro)
3925 s = htab->elf.sreldynrelro;
3926 else
3927 s = htab->elf.srelbss;
3928 elf_append_rel (output_bfd, s, &rel);
3929 }
3930
3931 return TRUE;
3932 }
3933
3934 /* Finish up local dynamic symbol handling. We set the contents of
3935 various dynamic sections here. */
3936
3937 static bfd_boolean
3938 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
3939 {
3940 struct elf_link_hash_entry *h
3941 = (struct elf_link_hash_entry *) *slot;
3942 struct bfd_link_info *info
3943 = (struct bfd_link_info *) inf;
3944
3945 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
3946 h, NULL);
3947 }
3948
3949 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
3950 here since undefined weak symbol may not be dynamic and may not be
3951 called for elf_i386_finish_dynamic_symbol. */
3952
3953 static bfd_boolean
3954 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
3955 void *inf)
3956 {
3957 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
3958 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3959
3960 if (h->root.type != bfd_link_hash_undefweak
3961 || h->dynindx != -1)
3962 return TRUE;
3963
3964 return elf_i386_finish_dynamic_symbol (info->output_bfd,
3965 info, h, NULL);
3966 }
3967
3968 /* Used to decide how to sort relocs in an optimal manner for the
3969 dynamic linker, before writing them out. */
3970
3971 static enum elf_reloc_type_class
3972 elf_i386_reloc_type_class (const struct bfd_link_info *info,
3973 const asection *rel_sec ATTRIBUTE_UNUSED,
3974 const Elf_Internal_Rela *rela)
3975 {
3976 bfd *abfd = info->output_bfd;
3977 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3978 struct elf_link_hash_table *htab = elf_hash_table (info);
3979
3980 if (htab->dynsym != NULL
3981 && htab->dynsym->contents != NULL)
3982 {
3983 /* Check relocation against STT_GNU_IFUNC symbol if there are
3984 dynamic symbols. */
3985 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3986 if (r_symndx != STN_UNDEF)
3987 {
3988 Elf_Internal_Sym sym;
3989 if (!bed->s->swap_symbol_in (abfd,
3990 (htab->dynsym->contents
3991 + r_symndx * sizeof (Elf32_External_Sym)),
3992 0, &sym))
3993 abort ();
3994
3995 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3996 return reloc_class_ifunc;
3997 }
3998 }
3999
4000 switch (ELF32_R_TYPE (rela->r_info))
4001 {
4002 case R_386_IRELATIVE:
4003 return reloc_class_ifunc;
4004 case R_386_RELATIVE:
4005 return reloc_class_relative;
4006 case R_386_JUMP_SLOT:
4007 return reloc_class_plt;
4008 case R_386_COPY:
4009 return reloc_class_copy;
4010 default:
4011 return reloc_class_normal;
4012 }
4013 }
4014
4015 /* Finish up the dynamic sections. */
4016
4017 static bfd_boolean
4018 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4019 struct bfd_link_info *info)
4020 {
4021 struct elf_x86_link_hash_table *htab;
4022
4023 htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
4024 if (htab == NULL)
4025 return FALSE;
4026
4027 if (!htab->elf.dynamic_sections_created)
4028 return TRUE;
4029
4030 if (htab->elf.splt && htab->elf.splt->size > 0)
4031 {
4032 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4033 really seem like the right value. */
4034 elf_section_data (htab->elf.splt->output_section)
4035 ->this_hdr.sh_entsize = 4;
4036
4037 if (htab->plt.has_plt0)
4038 {
4039 /* Fill in the special first entry in the procedure linkage
4040 table. */
4041 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
4042 htab->lazy_plt->plt0_entry_size);
4043 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
4044 htab->plt0_pad_byte,
4045 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
4046 if (!bfd_link_pic (info))
4047 {
4048 bfd_put_32 (output_bfd,
4049 (htab->elf.sgotplt->output_section->vma
4050 + htab->elf.sgotplt->output_offset
4051 + 4),
4052 htab->elf.splt->contents
4053 + htab->lazy_plt->plt0_got1_offset);
4054 bfd_put_32 (output_bfd,
4055 (htab->elf.sgotplt->output_section->vma
4056 + htab->elf.sgotplt->output_offset
4057 + 8),
4058 htab->elf.splt->contents
4059 + htab->lazy_plt->plt0_got2_offset);
4060
4061 if (htab->target_os == is_vxworks)
4062 {
4063 Elf_Internal_Rela rel;
4064 int num_plts = (htab->elf.splt->size
4065 / htab->plt.plt_entry_size) - 1;
4066 unsigned char *p;
4067 asection *srelplt2 = htab->srelplt2;
4068
4069 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4070 + 4. On IA32 we use REL relocations so the
4071 addend goes in the PLT directly. */
4072 rel.r_offset = (htab->elf.splt->output_section->vma
4073 + htab->elf.splt->output_offset
4074 + htab->lazy_plt->plt0_got1_offset);
4075 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4076 R_386_32);
4077 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4078 srelplt2->contents);
4079 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4080 + 8. */
4081 rel.r_offset = (htab->elf.splt->output_section->vma
4082 + htab->elf.splt->output_offset
4083 + htab->lazy_plt->plt0_got2_offset);
4084 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4085 R_386_32);
4086 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4087 srelplt2->contents +
4088 sizeof (Elf32_External_Rel));
4089 /* Correct the .rel.plt.unloaded relocations. */
4090 p = srelplt2->contents;
4091 if (bfd_link_pic (info))
4092 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4093 else
4094 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4095
4096 for (; num_plts; num_plts--)
4097 {
4098 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4099 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4100 R_386_32);
4101 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4102 p += sizeof (Elf32_External_Rel);
4103
4104 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4105 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4106 R_386_32);
4107 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4108 p += sizeof (Elf32_External_Rel);
4109 }
4110 }
4111 }
4112 }
4113 }
4114
4115 /* Fill PLT entries for undefined weak symbols in PIE. */
4116 if (bfd_link_pie (info))
4117 bfd_hash_traverse (&info->hash->table,
4118 elf_i386_pie_finish_undefweak_symbol,
4119 info);
4120
4121 return TRUE;
4122 }
4123
4124 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4125 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4126 It has to be done before elf_link_sort_relocs is called so that
4127 dynamic relocations are properly sorted. */
4128
4129 static bfd_boolean
4130 elf_i386_output_arch_local_syms
4131 (bfd *output_bfd ATTRIBUTE_UNUSED,
4132 struct bfd_link_info *info,
4133 void *flaginfo ATTRIBUTE_UNUSED,
4134 int (*func) (void *, const char *,
4135 Elf_Internal_Sym *,
4136 asection *,
4137 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4138 {
4139 struct elf_x86_link_hash_table *htab
4140 = elf_x86_hash_table (info, I386_ELF_DATA);
4141 if (htab == NULL)
4142 return FALSE;
4143
4144 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4145 htab_traverse (htab->loc_hash_table,
4146 elf_i386_finish_local_dynamic_symbol,
4147 info);
4148
4149 return TRUE;
4150 }
4151
4152 /* Forward declaration. */
4153 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
4154
4155 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4156 dynamic relocations. */
4157
4158 static long
4159 elf_i386_get_synthetic_symtab (bfd *abfd,
4160 long symcount ATTRIBUTE_UNUSED,
4161 asymbol **syms ATTRIBUTE_UNUSED,
4162 long dynsymcount,
4163 asymbol **dynsyms,
4164 asymbol **ret)
4165 {
4166 long count, i, n;
4167 int j;
4168 bfd_byte *plt_contents;
4169 long relsize;
4170 const struct elf_x86_lazy_plt_layout *lazy_plt;
4171 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4172 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4173 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
4174 asection *plt;
4175 bfd_vma got_addr;
4176 enum elf_x86_plt_type plt_type;
4177 struct elf_x86_plt plts[] =
4178 {
4179 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4180 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4181 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4182 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
4183 };
4184
4185 *ret = NULL;
4186
4187 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4188 return 0;
4189
4190 if (dynsymcount <= 0)
4191 return 0;
4192
4193 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4194 if (relsize <= 0)
4195 return -1;
4196
4197 non_lazy_plt = NULL;
4198 /* Silence GCC 6. */
4199 lazy_plt = NULL;
4200 non_lazy_ibt_plt = NULL;
4201 lazy_ibt_plt = NULL;
4202 switch (get_elf_x86_backend_data (abfd)->target_os)
4203 {
4204 case is_normal:
4205 case is_solaris:
4206 non_lazy_plt = &elf_i386_non_lazy_plt;
4207 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4208 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4209 /* Fall through */
4210 case is_vxworks:
4211 lazy_plt = &elf_i386_lazy_plt;
4212 break;
4213 case is_nacl:
4214 lazy_plt = &elf_i386_nacl_plt;
4215 break;
4216 }
4217
4218 got_addr = 0;
4219
4220 count = 0;
4221 for (j = 0; plts[j].name != NULL; j++)
4222 {
4223 plt = bfd_get_section_by_name (abfd, plts[j].name);
4224 if (plt == NULL || plt->size == 0)
4225 continue;
4226
4227 /* Get the PLT section contents. */
4228 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4229 if (plt_contents == NULL)
4230 break;
4231 if (!bfd_get_section_contents (abfd, (asection *) plt,
4232 plt_contents, 0, plt->size))
4233 {
4234 free (plt_contents);
4235 break;
4236 }
4237
4238 /* Check what kind of PLT it is. */
4239 plt_type = plt_unknown;
4240 if (plts[j].type == plt_unknown
4241 && (plt->size >= (lazy_plt->plt0_entry_size
4242 + lazy_plt->plt_entry_size)))
4243 {
4244 /* Match lazy PLT first. */
4245 if (memcmp (plt_contents, lazy_plt->plt0_entry,
4246 lazy_plt->plt0_got1_offset) == 0)
4247 {
4248 /* The fist entry in the lazy IBT PLT is the same as the
4249 normal lazy PLT. */
4250 if (lazy_ibt_plt != NULL
4251 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4252 lazy_ibt_plt->plt_entry,
4253 lazy_ibt_plt->plt_got_offset) == 0))
4254 plt_type = plt_lazy | plt_second;
4255 else
4256 plt_type = plt_lazy;
4257 }
4258 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4259 lazy_plt->plt0_got1_offset) == 0)
4260 {
4261 /* The fist entry in the PIC lazy IBT PLT is the same as
4262 the normal PIC lazy PLT. */
4263 if (lazy_ibt_plt != NULL
4264 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4265 lazy_ibt_plt->pic_plt_entry,
4266 lazy_ibt_plt->plt_got_offset) == 0))
4267 plt_type = plt_lazy | plt_pic | plt_second;
4268 else
4269 plt_type = plt_lazy | plt_pic;
4270 }
4271 }
4272
4273 if (non_lazy_plt != NULL
4274 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4275 && plt->size >= non_lazy_plt->plt_entry_size)
4276 {
4277 /* Match non-lazy PLT. */
4278 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4279 non_lazy_plt->plt_got_offset) == 0)
4280 plt_type = plt_non_lazy;
4281 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4282 non_lazy_plt->plt_got_offset) == 0)
4283 plt_type = plt_pic;
4284 }
4285
4286 if ((non_lazy_ibt_plt != NULL)
4287 && (plt_type == plt_unknown || plt_type == plt_second)
4288 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
4289 {
4290 if (memcmp (plt_contents,
4291 non_lazy_ibt_plt->plt_entry,
4292 non_lazy_ibt_plt->plt_got_offset) == 0)
4293 {
4294 /* Match IBT PLT. */
4295 plt_type = plt_second;
4296 non_lazy_plt = non_lazy_ibt_plt;
4297 }
4298 else if (memcmp (plt_contents,
4299 non_lazy_ibt_plt->pic_plt_entry,
4300 non_lazy_ibt_plt->plt_got_offset) == 0)
4301 {
4302 /* Match PIC IBT PLT. */
4303 plt_type = plt_second | plt_pic;
4304 non_lazy_plt = non_lazy_ibt_plt;
4305 }
4306 }
4307
4308 if (plt_type == plt_unknown)
4309 {
4310 free (plt_contents);
4311 continue;
4312 }
4313
4314 plts[j].sec = plt;
4315 plts[j].type = plt_type;
4316
4317 if ((plt_type & plt_lazy))
4318 {
4319 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4320 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4321 /* Skip PLT0 in lazy PLT. */
4322 i = 1;
4323 }
4324 else
4325 {
4326 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4327 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4328 i = 0;
4329 }
4330
4331 /* Skip lazy PLT when the second PLT is used. */
4332 if ((plt_type & (plt_lazy | plt_second))
4333 == (plt_lazy | plt_second))
4334 plts[j].count = 0;
4335 else
4336 {
4337 n = plt->size / plts[j].plt_entry_size;
4338 plts[j].count = n;
4339 count += n - i;
4340 }
4341
4342 plts[j].contents = plt_contents;
4343
4344 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4345 if ((plt_type & plt_pic))
4346 got_addr = (bfd_vma) -1;
4347 }
4348
4349 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4350 got_addr, plts, dynsyms,
4351 ret);
4352 }
4353
4354 /* Set up i386 GNU properties. Return the first relocatable ELF input
4355 with GNU properties if found. Otherwise, return NULL. */
4356
4357 static bfd *
4358 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4359 {
4360 struct elf_x86_init_table init_table;
4361
4362 switch (get_elf_x86_backend_data (info->output_bfd)->target_os)
4363 {
4364 case is_normal:
4365 case is_solaris:
4366 init_table.plt0_pad_byte = 0x0;
4367 init_table.lazy_plt = &elf_i386_lazy_plt;
4368 init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4369 init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4370 init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4371 break;
4372 case is_vxworks:
4373 init_table.plt0_pad_byte = 0x90;
4374 init_table.lazy_plt = &elf_i386_lazy_plt;
4375 init_table.non_lazy_plt = NULL;
4376 init_table.lazy_ibt_plt = NULL;
4377 init_table.non_lazy_ibt_plt = NULL;
4378 break;
4379 case is_nacl:
4380 init_table.plt0_pad_byte = 0x90;
4381 init_table.lazy_plt = &elf_i386_nacl_plt;
4382 init_table.non_lazy_plt = NULL;
4383 init_table.lazy_ibt_plt = NULL;
4384 init_table.non_lazy_ibt_plt = NULL;
4385 break;
4386 }
4387
4388 init_table.r_info = elf32_r_info;
4389 init_table.r_sym = elf32_r_sym;
4390
4391 return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
4392 }
4393
4394 #define TARGET_LITTLE_SYM i386_elf32_vec
4395 #define TARGET_LITTLE_NAME "elf32-i386"
4396 #define ELF_ARCH bfd_arch_i386
4397 #define ELF_TARGET_ID I386_ELF_DATA
4398 #define ELF_MACHINE_CODE EM_386
4399 #define ELF_MAXPAGESIZE 0x1000
4400
4401 #define elf_backend_can_gc_sections 1
4402 #define elf_backend_can_refcount 1
4403 #define elf_backend_want_got_plt 1
4404 #define elf_backend_plt_readonly 1
4405 #define elf_backend_want_plt_sym 0
4406 #define elf_backend_got_header_size 12
4407 #define elf_backend_plt_alignment 4
4408 #define elf_backend_dtrel_excludes_plt 1
4409 #define elf_backend_extern_protected_data 1
4410 #define elf_backend_caches_rawsize 1
4411 #define elf_backend_want_dynrelro 1
4412
4413 /* Support RELA for objdump of prelink objects. */
4414 #define elf_info_to_howto elf_i386_info_to_howto_rel
4415 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4416
4417 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4418 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4419 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4420 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
4421
4422 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4423 #define elf_backend_check_relocs elf_i386_check_relocs
4424 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4425 #define elf_backend_fake_sections elf_i386_fake_sections
4426 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4427 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4428 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
4429 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4430 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4431 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4432 #define elf_backend_relocate_section elf_i386_relocate_section
4433 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
4434 #define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
4435
4436 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4437
4438 #include "elf32-target.h"
4439
4440 /* FreeBSD support. */
4441
4442 #undef TARGET_LITTLE_SYM
4443 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
4444 #undef TARGET_LITTLE_NAME
4445 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4446 #undef ELF_OSABI
4447 #define ELF_OSABI ELFOSABI_FREEBSD
4448
4449 /* The kernel recognizes executables as valid only if they carry a
4450 "FreeBSD" label in the ELF header. So we put this label on all
4451 executables and (for simplicity) also all other object files. */
4452
4453 static void
4454 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4455 {
4456 _bfd_elf_post_process_headers (abfd, info);
4457
4458 #ifdef OLD_FREEBSD_ABI_LABEL
4459 {
4460 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4461 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4462 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4463 }
4464 #endif
4465 }
4466
4467 #undef elf_backend_post_process_headers
4468 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4469 #undef elf32_bed
4470 #define elf32_bed elf32_i386_fbsd_bed
4471
4472 #undef elf_backend_add_symbol_hook
4473
4474 #include "elf32-target.h"
4475
4476 /* Solaris 2. */
4477
4478 #undef TARGET_LITTLE_SYM
4479 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
4480 #undef TARGET_LITTLE_NAME
4481 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
4482
4483 static const struct elf_x86_backend_data elf_i386_solaris_arch_bed =
4484 {
4485 is_solaris /* os */
4486 };
4487
4488 #undef elf_backend_arch_data
4489 #define elf_backend_arch_data &elf_i386_solaris_arch_bed
4490
4491 #undef elf_backend_post_process_headers
4492
4493 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4494 objects won't be recognized. */
4495 #undef ELF_OSABI
4496
4497 #undef elf32_bed
4498 #define elf32_bed elf32_i386_sol2_bed
4499
4500 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4501 boundary. */
4502 #undef elf_backend_static_tls_alignment
4503 #define elf_backend_static_tls_alignment 8
4504
4505 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4506
4507 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4508 File, p.63. */
4509 #undef elf_backend_want_plt_sym
4510 #define elf_backend_want_plt_sym 1
4511
4512 #undef elf_backend_strtab_flags
4513 #define elf_backend_strtab_flags SHF_STRINGS
4514
4515 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
4516 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
4517 FALSE otherwise. ISECTION is the best guess matching section from the
4518 input bfd IBFD, but it might be NULL. */
4519
4520 static bfd_boolean
4521 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4522 bfd *obfd ATTRIBUTE_UNUSED,
4523 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4524 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
4525 {
4526 /* PR 19938: FIXME: Need to add code for setting the sh_info
4527 and sh_link fields of Solaris specific section types. */
4528 return FALSE;
4529
4530 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
4531 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4532
4533 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4534
4535 The following values should be set:
4536
4537 Type Link Info
4538 -----------------------------------------------------------------------------
4539 SHT_SUNW_ancillary The section header index of 0
4540 [0x6fffffee] the associated string table.
4541
4542 SHT_SUNW_capinfo The section header index of For a dynamic object, the
4543 [0x6ffffff0] the associated symbol table. section header index of
4544 the associated
4545 SHT_SUNW_capchain table,
4546 otherwise 0.
4547
4548 SHT_SUNW_symsort The section header index of 0
4549 [0x6ffffff1] the associated symbol table.
4550
4551 SHT_SUNW_tlssort The section header index of 0
4552 [0x6ffffff2] the associated symbol table.
4553
4554 SHT_SUNW_LDYNSYM The section header index of One greater than the
4555 [0x6ffffff3] the associated string table. symbol table index of the
4556 This index is the same string last local symbol,
4557 table used by the SHT_DYNSYM STB_LOCAL. Since
4558 section. SHT_SUNW_LDYNSYM only
4559 contains local symbols,
4560 sh_info is equivalent to
4561 the number of symbols in
4562 the table.
4563
4564 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4565 [0x6ffffff5] the section header index of to named strings, the
4566 the associated section header index of
4567 SHT_SUNW_capinfo table, the associated string
4568 otherwise 0. table, otherwise 0.
4569
4570 SHT_SUNW_move The section header index of 0
4571 [0x6ffffffa] the associated symbol table.
4572
4573 SHT_SUNW_COMDAT 0 0
4574 [0x6ffffffb]
4575
4576 SHT_SUNW_syminfo The section header index of The section header index
4577 [0x6ffffffc] the associated symbol table. of the associated
4578 .dynamic section.
4579
4580 SHT_SUNW_verdef The section header index of The number of version
4581 [0x6ffffffd] the associated string table. definitions within the
4582 section.
4583
4584 SHT_SUNW_verneed The section header index of The number of version
4585 [0x6ffffffe] the associated string table. dependencies within the
4586 section.
4587
4588 SHT_SUNW_versym The section header index of 0
4589 [0x6fffffff] the associated symbol table. */
4590 }
4591
4592 #undef elf_backend_copy_special_section_fields
4593 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
4594
4595 #include "elf32-target.h"
4596
4597 /* Intel MCU support. */
4598
4599 static bfd_boolean
4600 elf32_iamcu_elf_object_p (bfd *abfd)
4601 {
4602 /* Set the right machine number for an IAMCU elf32 file. */
4603 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4604 return TRUE;
4605 }
4606
4607 #undef TARGET_LITTLE_SYM
4608 #define TARGET_LITTLE_SYM iamcu_elf32_vec
4609 #undef TARGET_LITTLE_NAME
4610 #define TARGET_LITTLE_NAME "elf32-iamcu"
4611 #undef ELF_ARCH
4612 #define ELF_ARCH bfd_arch_iamcu
4613
4614 #undef ELF_MACHINE_CODE
4615 #define ELF_MACHINE_CODE EM_IAMCU
4616
4617 #undef elf_backend_arch_data
4618 #define elf_backend_arch_data &elf_i386_arch_bed
4619
4620 #undef ELF_OSABI
4621
4622 #undef elf32_bed
4623 #define elf32_bed elf32_iamcu_bed
4624
4625 #undef elf_backend_object_p
4626 #define elf_backend_object_p elf32_iamcu_elf_object_p
4627
4628 #undef elf_backend_static_tls_alignment
4629
4630 #undef elf_backend_want_plt_sym
4631 #define elf_backend_want_plt_sym 0
4632
4633 #undef elf_backend_strtab_flags
4634 #undef elf_backend_copy_special_section_fields
4635
4636 #include "elf32-target.h"
4637
4638 /* Restore defaults. */
4639 #undef ELF_ARCH
4640 #define ELF_ARCH bfd_arch_i386
4641 #undef ELF_MACHINE_CODE
4642 #define ELF_MACHINE_CODE EM_386
4643
4644 /* Native Client support. */
4645
4646 #undef TARGET_LITTLE_SYM
4647 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
4648 #undef TARGET_LITTLE_NAME
4649 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
4650 #undef elf32_bed
4651 #define elf32_bed elf32_i386_nacl_bed
4652
4653 #undef ELF_MAXPAGESIZE
4654 #define ELF_MAXPAGESIZE 0x10000
4655
4656 /* Restore defaults. */
4657 #undef ELF_OSABI
4658 #undef elf_backend_want_plt_sym
4659 #define elf_backend_want_plt_sym 0
4660 #undef elf_backend_post_process_headers
4661 #undef elf_backend_static_tls_alignment
4662
4663 /* NaCl uses substantially different PLT entries for the same effects. */
4664
4665 #undef elf_backend_plt_alignment
4666 #define elf_backend_plt_alignment 5
4667 #define NACL_PLT_ENTRY_SIZE 64
4668 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
4669
4670 static const bfd_byte elf_i386_nacl_plt0_entry[] =
4671 {
4672 0xff, 0x35, /* pushl contents of address */
4673 0, 0, 0, 0, /* replaced with address of .got + 4. */
4674 0x8b, 0x0d, /* movl contents of address, %ecx */
4675 0, 0, 0, 0, /* replaced with address of .got + 8. */
4676 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4677 0xff, 0xe1 /* jmp *%ecx */
4678 };
4679
4680 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
4681 {
4682 0x8b, 0x0d, /* movl contents of address, %ecx */
4683 0, 0, 0, 0, /* replaced with GOT slot address. */
4684 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4685 0xff, 0xe1, /* jmp *%ecx */
4686
4687 /* Pad to the next 32-byte boundary with nop instructions. */
4688 0x90,
4689 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4690 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4691
4692 /* Lazy GOT entries point here (32-byte aligned). */
4693 0x68, /* pushl immediate */
4694 0, 0, 0, 0, /* replaced with reloc offset. */
4695 0xe9, /* jmp relative */
4696 0, 0, 0, 0, /* replaced with offset to .plt. */
4697
4698 /* Pad to the next 32-byte boundary with nop instructions. */
4699 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4700 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4701 0x90, 0x90
4702 };
4703
4704 static const bfd_byte
4705 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
4706 {
4707 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
4708 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
4709 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
4710 0xff, 0xe1, /* jmp *%ecx */
4711
4712 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
4713 so pad to that size with nop instructions. */
4714 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
4715 };
4716
4717 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
4718 {
4719 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
4720 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
4721 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
4722 0xff, 0xe1, /* jmp *%ecx */
4723
4724 /* Pad to the next 32-byte boundary with nop instructions. */
4725 0x90,
4726 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4727 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4728
4729 /* Lazy GOT entries point here (32-byte aligned). */
4730 0x68, /* pushl immediate */
4731 0, 0, 0, 0, /* replaced with offset into relocation table. */
4732 0xe9, /* jmp relative */
4733 0, 0, 0, 0, /* replaced with offset to start of .plt. */
4734
4735 /* Pad to the next 32-byte boundary with nop instructions. */
4736 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4737 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4738 0x90, 0x90
4739 };
4740
4741 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
4742 {
4743 #if (PLT_CIE_LENGTH != 20 \
4744 || PLT_FDE_LENGTH != 36 \
4745 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
4746 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
4747 # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
4748 #endif
4749 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
4750 0, 0, 0, 0, /* CIE ID */
4751 1, /* CIE version */
4752 'z', 'R', 0, /* Augmentation string */
4753 1, /* Code alignment factor */
4754 0x7c, /* Data alignment factor: -4 */
4755 8, /* Return address column */
4756 1, /* Augmentation size */
4757 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
4758 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
4759 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
4760 DW_CFA_nop, DW_CFA_nop,
4761
4762 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
4763 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
4764 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
4765 0, 0, 0, 0, /* .plt size goes here */
4766 0, /* Augmentation size */
4767 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
4768 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
4769 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
4770 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
4771 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
4772 13, /* Block length */
4773 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
4774 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
4775 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
4776 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
4777 DW_CFA_nop, DW_CFA_nop
4778 };
4779
4780 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
4781 {
4782 elf_i386_nacl_plt0_entry, /* plt0_entry */
4783 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
4784 elf_i386_nacl_plt_entry, /* plt_entry */
4785 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
4786 2, /* plt0_got1_offset */
4787 8, /* plt0_got2_offset */
4788 0, /* plt0_got2_insn_end */
4789 2, /* plt_got_offset */
4790 33, /* plt_reloc_offset */
4791 38, /* plt_plt_offset */
4792 0, /* plt_got_insn_size */
4793 0, /* plt_plt_insn_end */
4794 32, /* plt_lazy_offset */
4795 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
4796 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
4797 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
4798 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
4799 };
4800
4801 static const struct elf_x86_backend_data elf_i386_nacl_arch_bed =
4802 {
4803 is_nacl /* os */
4804 };
4805
4806 static bfd_boolean
4807 elf32_i386_nacl_elf_object_p (bfd *abfd)
4808 {
4809 /* Set the right machine number for a NaCl i386 ELF32 file. */
4810 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
4811 return TRUE;
4812 }
4813
4814 #undef elf_backend_arch_data
4815 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
4816
4817 #undef elf_backend_object_p
4818 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
4819 #undef elf_backend_modify_segment_map
4820 #define elf_backend_modify_segment_map nacl_modify_segment_map
4821 #undef elf_backend_modify_program_headers
4822 #define elf_backend_modify_program_headers nacl_modify_program_headers
4823 #undef elf_backend_final_write_processing
4824 #define elf_backend_final_write_processing nacl_final_write_processing
4825
4826 #include "elf32-target.h"
4827
4828 /* Restore defaults. */
4829 #undef elf_backend_object_p
4830 #undef elf_backend_modify_segment_map
4831 #undef elf_backend_modify_program_headers
4832 #undef elf_backend_final_write_processing
4833
4834 /* VxWorks support. */
4835
4836 #undef TARGET_LITTLE_SYM
4837 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
4838 #undef TARGET_LITTLE_NAME
4839 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4840 #undef ELF_OSABI
4841 #undef ELF_MAXPAGESIZE
4842 #define ELF_MAXPAGESIZE 0x1000
4843 #undef elf_backend_plt_alignment
4844 #define elf_backend_plt_alignment 4
4845
4846 static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed =
4847 {
4848 is_vxworks /* os */
4849 };
4850
4851 #undef elf_backend_arch_data
4852 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
4853
4854 #undef elf_backend_relocs_compatible
4855 #undef elf_backend_add_symbol_hook
4856 #define elf_backend_add_symbol_hook \
4857 elf_vxworks_add_symbol_hook
4858 #undef elf_backend_link_output_symbol_hook
4859 #define elf_backend_link_output_symbol_hook \
4860 elf_vxworks_link_output_symbol_hook
4861 #undef elf_backend_emit_relocs
4862 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4863 #undef elf_backend_final_write_processing
4864 #define elf_backend_final_write_processing \
4865 elf_vxworks_final_write_processing
4866 #undef elf_backend_static_tls_alignment
4867
4868 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4869 define it. */
4870 #undef elf_backend_want_plt_sym
4871 #define elf_backend_want_plt_sym 1
4872
4873 #undef elf32_bed
4874 #define elf32_bed elf32_i386_vxworks_bed
4875
4876 #include "elf32-target.h"
GDB Binutils - Deliverables
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