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Use standardized error message for unrecognized relocs.
[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 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2225 sections because such sections are not SEC_ALLOC and
2226 thus ld.so will not process them. */
2227 if ((input_section->flags & SEC_DEBUGGING) != 0)
2228 continue;
2229 abort ();
2230 }
2231
2232 /* STT_GNU_IFUNC symbol must go through PLT. */
2233 if (htab->elf.splt != NULL)
2234 {
2235 if (htab->plt_second != NULL)
2236 {
2237 resolved_plt = htab->plt_second;
2238 plt_offset = eh->plt_second.offset;
2239 }
2240 else
2241 {
2242 resolved_plt = htab->elf.splt;
2243 plt_offset = h->plt.offset;
2244 }
2245 gotplt = htab->elf.sgotplt;
2246 }
2247 else
2248 {
2249 resolved_plt = htab->elf.iplt;
2250 plt_offset = h->plt.offset;
2251 gotplt = htab->elf.igotplt;
2252 }
2253
2254 switch (r_type)
2255 {
2256 default:
2257 break;
2258
2259 case R_386_GOT32:
2260 case R_386_GOT32X:
2261 base_got = htab->elf.sgot;
2262 off = h->got.offset;
2263
2264 if (base_got == NULL)
2265 abort ();
2266
2267 if (off == (bfd_vma) -1)
2268 {
2269 /* We can't use h->got.offset here to save state, or
2270 even just remember the offset, as finish_dynamic_symbol
2271 would use that as offset into .got. */
2272
2273 if (h->plt.offset == (bfd_vma) -1)
2274 abort ();
2275
2276 if (htab->elf.splt != NULL)
2277 {
2278 plt_index = (h->plt.offset / plt_entry_size
2279 - htab->plt.has_plt0);
2280 off = (plt_index + 3) * 4;
2281 base_got = htab->elf.sgotplt;
2282 }
2283 else
2284 {
2285 plt_index = h->plt.offset / plt_entry_size;
2286 off = plt_index * 4;
2287 base_got = htab->elf.igotplt;
2288 }
2289
2290 if (h->dynindx == -1
2291 || h->forced_local
2292 || info->symbolic)
2293 {
2294 /* This references the local defitionion. We must
2295 initialize this entry in the global offset table.
2296 Since the offset must always be a multiple of 8,
2297 we use the least significant bit to record
2298 whether we have initialized it already.
2299
2300 When doing a dynamic link, we create a .rela.got
2301 relocation entry to initialize the value. This
2302 is done in the finish_dynamic_symbol routine. */
2303 if ((off & 1) != 0)
2304 off &= ~1;
2305 else
2306 {
2307 bfd_put_32 (output_bfd, relocation,
2308 base_got->contents + off);
2309 h->got.offset |= 1;
2310 }
2311 }
2312
2313 relocation = off;
2314 }
2315 else
2316 relocation = (base_got->output_section->vma
2317 + base_got->output_offset + off
2318 - gotplt->output_section->vma
2319 - gotplt->output_offset);
2320
2321 if (rel->r_offset > 1
2322 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2323 && *(contents + rel->r_offset - 2) != 0x8d)
2324 {
2325 if (bfd_link_pic (info))
2326 goto disallow_got32;
2327
2328 /* Add the GOT base if there is no base register. */
2329 relocation += (gotplt->output_section->vma
2330 + gotplt->output_offset);
2331 }
2332 else if (htab->elf.splt == NULL)
2333 {
2334 /* Adjust for static executables. */
2335 relocation += gotplt->output_offset;
2336 }
2337
2338 goto do_relocation;
2339 }
2340
2341 if (h->plt.offset == (bfd_vma) -1)
2342 {
2343 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2344 if (r_type == R_386_32
2345 && (input_section->flags & SEC_CODE) == 0)
2346 goto do_ifunc_pointer;
2347 goto bad_ifunc_reloc;
2348 }
2349
2350 relocation = (resolved_plt->output_section->vma
2351 + resolved_plt->output_offset + plt_offset);
2352
2353 switch (r_type)
2354 {
2355 default:
2356 bad_ifunc_reloc:
2357 if (h->root.root.string)
2358 name = h->root.root.string;
2359 else
2360 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2361 NULL);
2362 _bfd_error_handler
2363 /* xgettext:c-format */
2364 (_("%pB: relocation %s against STT_GNU_IFUNC "
2365 "symbol `%s' isn't supported"), input_bfd,
2366 howto->name, name);
2367 bfd_set_error (bfd_error_bad_value);
2368 return FALSE;
2369
2370 case R_386_32:
2371 /* Generate dynamic relcoation only when there is a
2372 non-GOT reference in a shared object. */
2373 if ((bfd_link_pic (info) && h->non_got_ref)
2374 || h->plt.offset == (bfd_vma) -1)
2375 {
2376 Elf_Internal_Rela outrel;
2377 asection *sreloc;
2378 bfd_vma offset;
2379
2380 do_ifunc_pointer:
2381 /* Need a dynamic relocation to get the real function
2382 adddress. */
2383 offset = _bfd_elf_section_offset (output_bfd,
2384 info,
2385 input_section,
2386 rel->r_offset);
2387 if (offset == (bfd_vma) -1
2388 || offset == (bfd_vma) -2)
2389 abort ();
2390
2391 outrel.r_offset = (input_section->output_section->vma
2392 + input_section->output_offset
2393 + offset);
2394
2395 if (POINTER_LOCAL_IFUNC_P (info, h))
2396 {
2397 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
2398 h->root.root.string,
2399 h->root.u.def.section->owner);
2400
2401 /* This symbol is resolved locally. */
2402 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2403 bfd_put_32 (output_bfd,
2404 (h->root.u.def.value
2405 + h->root.u.def.section->output_section->vma
2406 + h->root.u.def.section->output_offset),
2407 contents + offset);
2408 }
2409 else
2410 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2411
2412 /* Dynamic relocations are stored in
2413 1. .rel.ifunc section in PIC object.
2414 2. .rel.got section in dynamic executable.
2415 3. .rel.iplt section in static executable. */
2416 if (bfd_link_pic (info))
2417 sreloc = htab->elf.irelifunc;
2418 else if (htab->elf.splt != NULL)
2419 sreloc = htab->elf.srelgot;
2420 else
2421 sreloc = htab->elf.irelplt;
2422 elf_append_rel (output_bfd, sreloc, &outrel);
2423
2424 /* If this reloc is against an external symbol, we
2425 do not want to fiddle with the addend. Otherwise,
2426 we need to include the symbol value so that it
2427 becomes an addend for the dynamic reloc. For an
2428 internal symbol, we have updated addend. */
2429 continue;
2430 }
2431 /* FALLTHROUGH */
2432 case R_386_PC32:
2433 case R_386_PLT32:
2434 goto do_relocation;
2435
2436 case R_386_GOTOFF:
2437 relocation -= (gotplt->output_section->vma
2438 + gotplt->output_offset);
2439 goto do_relocation;
2440 }
2441 }
2442
2443 resolved_to_zero = (eh != NULL
2444 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
2445
2446 switch (r_type)
2447 {
2448 case R_386_GOT32X:
2449 /* Avoid optimizing _DYNAMIC since ld.so may use its
2450 link-time address. */
2451 if (h == htab->elf.hdynamic)
2452 goto r_386_got32;
2453
2454 if (bfd_link_pic (info))
2455 {
2456 /* It is OK to convert mov to lea and convert indirect
2457 branch to direct branch. It is OK to convert adc,
2458 add, and, cmp, or, sbb, sub, test, xor only when PIC
2459 is false. */
2460 unsigned int opcode, addend;
2461 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
2462 if (addend != 0)
2463 goto r_386_got32;
2464 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2465 if (opcode != 0x8b && opcode != 0xff)
2466 goto r_386_got32;
2467 }
2468
2469 /* Resolve "mov GOT[(%reg)], %reg",
2470 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
2471 and "binop foo@GOT[(%reg)], %reg". */
2472 if (h == NULL
2473 || (h->plt.offset == (bfd_vma) -1
2474 && h->got.offset == (bfd_vma) -1)
2475 || htab->elf.sgotplt == NULL)
2476 abort ();
2477
2478 offplt = (htab->elf.sgotplt->output_section->vma
2479 + htab->elf.sgotplt->output_offset);
2480
2481 /* It is relative to .got.plt section. */
2482 if (h->got.offset != (bfd_vma) -1)
2483 /* Use GOT entry. Mask off the least significant bit in
2484 GOT offset which may be set by R_386_GOT32 processing
2485 below. */
2486 relocation = (htab->elf.sgot->output_section->vma
2487 + htab->elf.sgot->output_offset
2488 + (h->got.offset & ~1) - offplt);
2489 else
2490 /* Use GOTPLT entry. */
2491 relocation = (h->plt.offset / plt_entry_size
2492 - htab->plt.has_plt0 + 3) * 4;
2493
2494 if (!bfd_link_pic (info))
2495 {
2496 /* If not PIC, add the .got.plt section address for
2497 baseless addressing. */
2498 unsigned int modrm;
2499 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2500 if ((modrm & 0xc7) == 0x5)
2501 relocation += offplt;
2502 }
2503
2504 unresolved_reloc = FALSE;
2505 break;
2506
2507 case R_386_GOT32:
2508 r_386_got32:
2509 /* Relocation is to the entry for this symbol in the global
2510 offset table. */
2511 if (htab->elf.sgot == NULL)
2512 abort ();
2513
2514 relative_reloc = FALSE;
2515 if (h != NULL)
2516 {
2517 off = h->got.offset;
2518 if (RESOLVED_LOCALLY_P (info, h, htab))
2519 {
2520 /* We must initialize this entry in the global offset
2521 table. Since the offset must always be a multiple
2522 of 4, we use the least significant bit to record
2523 whether we have initialized it already.
2524
2525 When doing a dynamic link, we create a .rel.got
2526 relocation entry to initialize the value. This
2527 is done in the finish_dynamic_symbol routine. */
2528 if ((off & 1) != 0)
2529 off &= ~1;
2530 else
2531 {
2532 bfd_put_32 (output_bfd, relocation,
2533 htab->elf.sgot->contents + off);
2534 h->got.offset |= 1;
2535
2536 if (GENERATE_RELATIVE_RELOC_P (info, h))
2537 {
2538 /* PR ld/21402: If this symbol isn't dynamic
2539 in PIC, generate R_386_RELATIVE here. */
2540 eh->no_finish_dynamic_symbol = 1;
2541 relative_reloc = TRUE;
2542 }
2543 }
2544 }
2545 else
2546 unresolved_reloc = FALSE;
2547 }
2548 else
2549 {
2550 if (local_got_offsets == NULL)
2551 abort ();
2552
2553 off = local_got_offsets[r_symndx];
2554
2555 /* The offset must always be a multiple of 4. We use
2556 the least significant bit to record whether we have
2557 already generated the necessary reloc. */
2558 if ((off & 1) != 0)
2559 off &= ~1;
2560 else
2561 {
2562 bfd_put_32 (output_bfd, relocation,
2563 htab->elf.sgot->contents + off);
2564 local_got_offsets[r_symndx] |= 1;
2565
2566 if (bfd_link_pic (info))
2567 relative_reloc = TRUE;
2568 }
2569 }
2570
2571 if (relative_reloc)
2572 {
2573 asection *s;
2574 Elf_Internal_Rela outrel;
2575
2576 s = htab->elf.srelgot;
2577 if (s == NULL)
2578 abort ();
2579
2580 outrel.r_offset = (htab->elf.sgot->output_section->vma
2581 + htab->elf.sgot->output_offset
2582 + off);
2583 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2584 elf_append_rel (output_bfd, s, &outrel);
2585 }
2586
2587 if (off >= (bfd_vma) -2)
2588 abort ();
2589
2590 relocation = (htab->elf.sgot->output_section->vma
2591 + htab->elf.sgot->output_offset + off);
2592 if (rel->r_offset > 1
2593 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2594 && *(contents + rel->r_offset - 2) != 0x8d)
2595 {
2596 if (bfd_link_pic (info))
2597 {
2598 /* For PIC, disallow R_386_GOT32 without a base
2599 register, except for "lea foo@GOT, %reg", since
2600 we don't know what the GOT base is. */
2601 const char *name;
2602
2603 disallow_got32:
2604 if (h == NULL || h->root.root.string == NULL)
2605 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2606 NULL);
2607 else
2608 name = h->root.root.string;
2609
2610 _bfd_error_handler
2611 /* xgettext:c-format */
2612 (_("%pB: direct GOT relocation %s against `%s'"
2613 " without base register can not be used"
2614 " when making a shared object"),
2615 input_bfd, howto->name, name);
2616 bfd_set_error (bfd_error_bad_value);
2617 return FALSE;
2618 }
2619 }
2620 else
2621 {
2622 /* Subtract the .got.plt section address only with a base
2623 register. */
2624 relocation -= (htab->elf.sgotplt->output_section->vma
2625 + htab->elf.sgotplt->output_offset);
2626 }
2627
2628 break;
2629
2630 case R_386_GOTOFF:
2631 /* Relocation is relative to the start of the global offset
2632 table. */
2633
2634 /* Check to make sure it isn't a protected function or data
2635 symbol for shared library since it may not be local when
2636 used as function address or with copy relocation. We also
2637 need to make sure that a symbol is referenced locally. */
2638 if (!bfd_link_executable (info) && h)
2639 {
2640 if (!h->def_regular)
2641 {
2642 const char *v;
2643
2644 switch (ELF_ST_VISIBILITY (h->other))
2645 {
2646 case STV_HIDDEN:
2647 v = _("hidden symbol");
2648 break;
2649 case STV_INTERNAL:
2650 v = _("internal symbol");
2651 break;
2652 case STV_PROTECTED:
2653 v = _("protected symbol");
2654 break;
2655 default:
2656 v = _("symbol");
2657 break;
2658 }
2659
2660 _bfd_error_handler
2661 /* xgettext:c-format */
2662 (_("%pB: relocation R_386_GOTOFF against undefined %s"
2663 " `%s' can not be used when making a shared object"),
2664 input_bfd, v, h->root.root.string);
2665 bfd_set_error (bfd_error_bad_value);
2666 return FALSE;
2667 }
2668 else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
2669 && (h->type == STT_FUNC
2670 || h->type == STT_OBJECT)
2671 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2672 {
2673 _bfd_error_handler
2674 /* xgettext:c-format */
2675 (_("%pB: relocation R_386_GOTOFF against protected %s"
2676 " `%s' can not be used when making a shared object"),
2677 input_bfd,
2678 h->type == STT_FUNC ? "function" : "data",
2679 h->root.root.string);
2680 bfd_set_error (bfd_error_bad_value);
2681 return FALSE;
2682 }
2683 }
2684
2685 /* Note that sgot is not involved in this
2686 calculation. We always want the start of .got.plt. If we
2687 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2688 permitted by the ABI, we might have to change this
2689 calculation. */
2690 relocation -= htab->elf.sgotplt->output_section->vma
2691 + htab->elf.sgotplt->output_offset;
2692 break;
2693
2694 case R_386_GOTPC:
2695 /* Use global offset table as symbol value. */
2696 relocation = htab->elf.sgotplt->output_section->vma
2697 + htab->elf.sgotplt->output_offset;
2698 unresolved_reloc = FALSE;
2699 break;
2700
2701 case R_386_PLT32:
2702 /* Relocation is to the entry for this symbol in the
2703 procedure linkage table. */
2704
2705 /* Resolve a PLT32 reloc against a local symbol directly,
2706 without using the procedure linkage table. */
2707 if (h == NULL)
2708 break;
2709
2710 if ((h->plt.offset == (bfd_vma) -1
2711 && eh->plt_got.offset == (bfd_vma) -1)
2712 || htab->elf.splt == NULL)
2713 {
2714 /* We didn't make a PLT entry for this symbol. This
2715 happens when statically linking PIC code, or when
2716 using -Bsymbolic. */
2717 break;
2718 }
2719
2720 if (h->plt.offset != (bfd_vma) -1)
2721 {
2722 if (htab->plt_second != NULL)
2723 {
2724 resolved_plt = htab->plt_second;
2725 plt_offset = eh->plt_second.offset;
2726 }
2727 else
2728 {
2729 resolved_plt = htab->elf.splt;
2730 plt_offset = h->plt.offset;
2731 }
2732 }
2733 else
2734 {
2735 resolved_plt = htab->plt_got;
2736 plt_offset = eh->plt_got.offset;
2737 }
2738
2739 relocation = (resolved_plt->output_section->vma
2740 + resolved_plt->output_offset
2741 + plt_offset);
2742 unresolved_reloc = FALSE;
2743 break;
2744
2745 case R_386_SIZE32:
2746 /* Set to symbol size. */
2747 relocation = st_size;
2748 /* Fall through. */
2749
2750 case R_386_32:
2751 case R_386_PC32:
2752 if ((input_section->flags & SEC_ALLOC) == 0
2753 || is_vxworks_tls)
2754 break;
2755
2756 if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type,
2757 FALSE, resolved_to_zero,
2758 (r_type == R_386_PC32)))
2759 {
2760 Elf_Internal_Rela outrel;
2761 bfd_boolean skip, relocate;
2762 asection *sreloc;
2763
2764 /* When generating a shared object, these relocations
2765 are copied into the output file to be resolved at run
2766 time. */
2767
2768 skip = FALSE;
2769 relocate = FALSE;
2770
2771 outrel.r_offset =
2772 _bfd_elf_section_offset (output_bfd, info, input_section,
2773 rel->r_offset);
2774 if (outrel.r_offset == (bfd_vma) -1)
2775 skip = TRUE;
2776 else if (outrel.r_offset == (bfd_vma) -2)
2777 skip = TRUE, relocate = TRUE;
2778 outrel.r_offset += (input_section->output_section->vma
2779 + input_section->output_offset);
2780
2781 if (skip)
2782 memset (&outrel, 0, sizeof outrel);
2783 else if (COPY_INPUT_RELOC_P (info, h, r_type))
2784 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2785 else
2786 {
2787 /* This symbol is local, or marked to become local. */
2788 relocate = TRUE;
2789 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2790 }
2791
2792 sreloc = elf_section_data (input_section)->sreloc;
2793
2794 if (sreloc == NULL || sreloc->contents == NULL)
2795 {
2796 r = bfd_reloc_notsupported;
2797 goto check_relocation_error;
2798 }
2799
2800 elf_append_rel (output_bfd, sreloc, &outrel);
2801
2802 /* If this reloc is against an external symbol, we do
2803 not want to fiddle with the addend. Otherwise, we
2804 need to include the symbol value so that it becomes
2805 an addend for the dynamic reloc. */
2806 if (! relocate)
2807 continue;
2808 }
2809 break;
2810
2811 case R_386_TLS_IE:
2812 if (!bfd_link_executable (info))
2813 {
2814 Elf_Internal_Rela outrel;
2815 asection *sreloc;
2816
2817 outrel.r_offset = rel->r_offset
2818 + input_section->output_section->vma
2819 + input_section->output_offset;
2820 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2821 sreloc = elf_section_data (input_section)->sreloc;
2822 if (sreloc == NULL)
2823 abort ();
2824 elf_append_rel (output_bfd, sreloc, &outrel);
2825 }
2826 /* Fall through */
2827
2828 case R_386_TLS_GD:
2829 case R_386_TLS_GOTDESC:
2830 case R_386_TLS_DESC_CALL:
2831 case R_386_TLS_IE_32:
2832 case R_386_TLS_GOTIE:
2833 tls_type = GOT_UNKNOWN;
2834 if (h == NULL && local_got_offsets)
2835 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
2836 else if (h != NULL)
2837 tls_type = elf_x86_hash_entry(h)->tls_type;
2838 if (tls_type == GOT_TLS_IE)
2839 tls_type = GOT_TLS_IE_NEG;
2840
2841 r_type_tls = r_type;
2842 if (! elf_i386_tls_transition (info, input_bfd,
2843 input_section, contents,
2844 symtab_hdr, sym_hashes,
2845 &r_type_tls, tls_type, rel,
2846 relend, h, r_symndx, TRUE))
2847 return FALSE;
2848
2849 if (r_type_tls == R_386_TLS_LE_32)
2850 {
2851 BFD_ASSERT (! unresolved_reloc);
2852 if (r_type == R_386_TLS_GD)
2853 {
2854 unsigned int type;
2855 bfd_vma roff;
2856
2857 /* GD->LE transition. */
2858 type = *(contents + rel->r_offset - 2);
2859 if (type == 0x04)
2860 {
2861 /* Change
2862 leal foo@tlsgd(,%ebx,1), %eax
2863 call ___tls_get_addr@PLT
2864 into:
2865 movl %gs:0, %eax
2866 subl $foo@tpoff, %eax
2867 (6 byte form of subl). */
2868 roff = rel->r_offset + 5;
2869 }
2870 else
2871 {
2872 /* Change
2873 leal foo@tlsgd(%ebx), %eax
2874 call ___tls_get_addr@PLT
2875 nop
2876 or
2877 leal foo@tlsgd(%reg), %eax
2878 call *___tls_get_addr@GOT(%reg)
2879 which may be converted to
2880 addr32 call ___tls_get_addr
2881 into:
2882 movl %gs:0, %eax; subl $foo@tpoff, %eax
2883 (6 byte form of subl). */
2884 roff = rel->r_offset + 6;
2885 }
2886 memcpy (contents + roff - 8,
2887 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2888 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
2889 contents + roff);
2890 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
2891 rel++;
2892 wrel++;
2893 continue;
2894 }
2895 else if (r_type == R_386_TLS_GOTDESC)
2896 {
2897 /* GDesc -> LE transition.
2898 It's originally something like:
2899 leal x@tlsdesc(%ebx), %eax
2900
2901 leal x@ntpoff, %eax
2902
2903 Registers other than %eax may be set up here. */
2904
2905 unsigned int val;
2906 bfd_vma roff;
2907
2908 roff = rel->r_offset;
2909 val = bfd_get_8 (input_bfd, contents + roff - 1);
2910
2911 /* Now modify the instruction as appropriate. */
2912 /* aoliva FIXME: remove the above and xor the byte
2913 below with 0x86. */
2914 bfd_put_8 (output_bfd, val ^ 0x86,
2915 contents + roff - 1);
2916 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
2917 contents + roff);
2918 continue;
2919 }
2920 else if (r_type == R_386_TLS_DESC_CALL)
2921 {
2922 /* GDesc -> LE transition.
2923 It's originally:
2924 call *(%eax)
2925 Turn it into:
2926 xchg %ax,%ax */
2927
2928 bfd_vma roff;
2929
2930 roff = rel->r_offset;
2931 bfd_put_8 (output_bfd, 0x66, contents + roff);
2932 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2933 continue;
2934 }
2935 else if (r_type == R_386_TLS_IE)
2936 {
2937 unsigned int val;
2938
2939 /* IE->LE transition:
2940 Originally it can be one of:
2941 movl foo, %eax
2942 movl foo, %reg
2943 addl foo, %reg
2944 We change it into:
2945 movl $foo, %eax
2946 movl $foo, %reg
2947 addl $foo, %reg. */
2948 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2949 if (val == 0xa1)
2950 {
2951 /* movl foo, %eax. */
2952 bfd_put_8 (output_bfd, 0xb8,
2953 contents + rel->r_offset - 1);
2954 }
2955 else
2956 {
2957 unsigned int type;
2958
2959 type = bfd_get_8 (input_bfd,
2960 contents + rel->r_offset - 2);
2961 switch (type)
2962 {
2963 case 0x8b:
2964 /* movl */
2965 bfd_put_8 (output_bfd, 0xc7,
2966 contents + rel->r_offset - 2);
2967 bfd_put_8 (output_bfd,
2968 0xc0 | ((val >> 3) & 7),
2969 contents + rel->r_offset - 1);
2970 break;
2971 case 0x03:
2972 /* addl */
2973 bfd_put_8 (output_bfd, 0x81,
2974 contents + rel->r_offset - 2);
2975 bfd_put_8 (output_bfd,
2976 0xc0 | ((val >> 3) & 7),
2977 contents + rel->r_offset - 1);
2978 break;
2979 default:
2980 BFD_FAIL ();
2981 break;
2982 }
2983 }
2984 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
2985 contents + rel->r_offset);
2986 continue;
2987 }
2988 else
2989 {
2990 unsigned int val, type;
2991
2992 /* {IE_32,GOTIE}->LE transition:
2993 Originally it can be one of:
2994 subl foo(%reg1), %reg2
2995 movl foo(%reg1), %reg2
2996 addl foo(%reg1), %reg2
2997 We change it into:
2998 subl $foo, %reg2
2999 movl $foo, %reg2 (6 byte form)
3000 addl $foo, %reg2. */
3001 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3002 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3003 if (type == 0x8b)
3004 {
3005 /* movl */
3006 bfd_put_8 (output_bfd, 0xc7,
3007 contents + rel->r_offset - 2);
3008 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3009 contents + rel->r_offset - 1);
3010 }
3011 else if (type == 0x2b)
3012 {
3013 /* subl */
3014 bfd_put_8 (output_bfd, 0x81,
3015 contents + rel->r_offset - 2);
3016 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3017 contents + rel->r_offset - 1);
3018 }
3019 else if (type == 0x03)
3020 {
3021 /* addl */
3022 bfd_put_8 (output_bfd, 0x81,
3023 contents + rel->r_offset - 2);
3024 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3025 contents + rel->r_offset - 1);
3026 }
3027 else
3028 BFD_FAIL ();
3029 if (r_type == R_386_TLS_GOTIE)
3030 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3031 contents + rel->r_offset);
3032 else
3033 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3034 contents + rel->r_offset);
3035 continue;
3036 }
3037 }
3038
3039 if (htab->elf.sgot == NULL)
3040 abort ();
3041
3042 if (h != NULL)
3043 {
3044 off = h->got.offset;
3045 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
3046 }
3047 else
3048 {
3049 if (local_got_offsets == NULL)
3050 abort ();
3051
3052 off = local_got_offsets[r_symndx];
3053 offplt = local_tlsdesc_gotents[r_symndx];
3054 }
3055
3056 if ((off & 1) != 0)
3057 off &= ~1;
3058 else
3059 {
3060 Elf_Internal_Rela outrel;
3061 int dr_type;
3062 asection *sreloc;
3063
3064 if (htab->elf.srelgot == NULL)
3065 abort ();
3066
3067 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3068
3069 if (GOT_TLS_GDESC_P (tls_type))
3070 {
3071 bfd_byte *loc;
3072 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3073 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3074 <= htab->elf.sgotplt->size);
3075 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3076 + htab->elf.sgotplt->output_offset
3077 + offplt
3078 + htab->sgotplt_jump_table_size);
3079 sreloc = htab->elf.srelplt;
3080 loc = sreloc->contents;
3081 loc += (htab->next_tls_desc_index++
3082 * sizeof (Elf32_External_Rel));
3083 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3084 <= sreloc->contents + sreloc->size);
3085 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3086 if (indx == 0)
3087 {
3088 BFD_ASSERT (! unresolved_reloc);
3089 bfd_put_32 (output_bfd,
3090 relocation - _bfd_x86_elf_dtpoff_base (info),
3091 htab->elf.sgotplt->contents + offplt
3092 + htab->sgotplt_jump_table_size + 4);
3093 }
3094 else
3095 {
3096 bfd_put_32 (output_bfd, 0,
3097 htab->elf.sgotplt->contents + offplt
3098 + htab->sgotplt_jump_table_size + 4);
3099 }
3100 }
3101
3102 sreloc = htab->elf.srelgot;
3103
3104 outrel.r_offset = (htab->elf.sgot->output_section->vma
3105 + htab->elf.sgot->output_offset + off);
3106
3107 if (GOT_TLS_GD_P (tls_type))
3108 dr_type = R_386_TLS_DTPMOD32;
3109 else if (GOT_TLS_GDESC_P (tls_type))
3110 goto dr_done;
3111 else if (tls_type == GOT_TLS_IE_POS)
3112 dr_type = R_386_TLS_TPOFF;
3113 else
3114 dr_type = R_386_TLS_TPOFF32;
3115
3116 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3117 bfd_put_32 (output_bfd,
3118 relocation - _bfd_x86_elf_dtpoff_base (info),
3119 htab->elf.sgot->contents + off);
3120 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3121 bfd_put_32 (output_bfd,
3122 _bfd_x86_elf_dtpoff_base (info) - relocation,
3123 htab->elf.sgot->contents + off);
3124 else if (dr_type != R_386_TLS_DESC)
3125 bfd_put_32 (output_bfd, 0,
3126 htab->elf.sgot->contents + off);
3127 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3128
3129 elf_append_rel (output_bfd, sreloc, &outrel);
3130
3131 if (GOT_TLS_GD_P (tls_type))
3132 {
3133 if (indx == 0)
3134 {
3135 BFD_ASSERT (! unresolved_reloc);
3136 bfd_put_32 (output_bfd,
3137 relocation - _bfd_x86_elf_dtpoff_base (info),
3138 htab->elf.sgot->contents + off + 4);
3139 }
3140 else
3141 {
3142 bfd_put_32 (output_bfd, 0,
3143 htab->elf.sgot->contents + off + 4);
3144 outrel.r_info = ELF32_R_INFO (indx,
3145 R_386_TLS_DTPOFF32);
3146 outrel.r_offset += 4;
3147 elf_append_rel (output_bfd, sreloc, &outrel);
3148 }
3149 }
3150 else if (tls_type == GOT_TLS_IE_BOTH)
3151 {
3152 bfd_put_32 (output_bfd,
3153 (indx == 0
3154 ? relocation - _bfd_x86_elf_dtpoff_base (info)
3155 : 0),
3156 htab->elf.sgot->contents + off + 4);
3157 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3158 outrel.r_offset += 4;
3159 elf_append_rel (output_bfd, sreloc, &outrel);
3160 }
3161
3162 dr_done:
3163 if (h != NULL)
3164 h->got.offset |= 1;
3165 else
3166 local_got_offsets[r_symndx] |= 1;
3167 }
3168
3169 if (off >= (bfd_vma) -2
3170 && ! GOT_TLS_GDESC_P (tls_type))
3171 abort ();
3172 if (r_type_tls == R_386_TLS_GOTDESC
3173 || r_type_tls == R_386_TLS_DESC_CALL)
3174 {
3175 relocation = htab->sgotplt_jump_table_size + offplt;
3176 unresolved_reloc = FALSE;
3177 }
3178 else if (r_type_tls == r_type)
3179 {
3180 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3181 + htab->elf.sgotplt->output_offset;
3182 relocation = htab->elf.sgot->output_section->vma
3183 + htab->elf.sgot->output_offset + off - g_o_t;
3184 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3185 && tls_type == GOT_TLS_IE_BOTH)
3186 relocation += 4;
3187 if (r_type == R_386_TLS_IE)
3188 relocation += g_o_t;
3189 unresolved_reloc = FALSE;
3190 }
3191 else if (r_type == R_386_TLS_GD)
3192 {
3193 unsigned int val, type;
3194 bfd_vma roff;
3195
3196 /* GD->IE transition. */
3197 type = *(contents + rel->r_offset - 2);
3198 val = *(contents + rel->r_offset - 1);
3199 if (type == 0x04)
3200 {
3201 /* Change
3202 leal foo@tlsgd(,%ebx,1), %eax
3203 call ___tls_get_addr@PLT
3204 into:
3205 movl %gs:0, %eax
3206 subl $foo@gottpoff(%ebx), %eax. */
3207 val >>= 3;
3208 roff = rel->r_offset - 3;
3209 }
3210 else
3211 {
3212 /* Change
3213 leal foo@tlsgd(%ebx), %eax
3214 call ___tls_get_addr@PLT
3215 nop
3216 or
3217 leal foo@tlsgd(%reg), %eax
3218 call *___tls_get_addr@GOT(%reg)
3219 which may be converted to
3220 addr32 call ___tls_get_addr
3221 into:
3222 movl %gs:0, %eax;
3223 subl $foo@gottpoff(%reg), %eax. */
3224 roff = rel->r_offset - 2;
3225 }
3226 memcpy (contents + roff,
3227 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3228 contents[roff + 7] = 0x80 | (val & 7);
3229 /* If foo is used only with foo@gotntpoff(%reg) and
3230 foo@indntpoff, but not with foo@gottpoff(%reg), change
3231 subl $foo@gottpoff(%reg), %eax
3232 into:
3233 addl $foo@gotntpoff(%reg), %eax. */
3234 if (tls_type == GOT_TLS_IE_POS)
3235 contents[roff + 6] = 0x03;
3236 bfd_put_32 (output_bfd,
3237 htab->elf.sgot->output_section->vma
3238 + htab->elf.sgot->output_offset + off
3239 - htab->elf.sgotplt->output_section->vma
3240 - htab->elf.sgotplt->output_offset,
3241 contents + roff + 8);
3242 /* Skip R_386_PLT32 and R_386_GOT32X. */
3243 rel++;
3244 wrel++;
3245 continue;
3246 }
3247 else if (r_type == R_386_TLS_GOTDESC)
3248 {
3249 /* GDesc -> IE transition.
3250 It's originally something like:
3251 leal x@tlsdesc(%ebx), %eax
3252
3253 Change it to:
3254 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3255 or:
3256 movl x@gottpoff(%ebx), %eax # before negl %eax
3257
3258 Registers other than %eax may be set up here. */
3259
3260 bfd_vma roff;
3261
3262 /* First, make sure it's a leal adding ebx to a 32-bit
3263 offset into any register, although it's probably
3264 almost always going to be eax. */
3265 roff = rel->r_offset;
3266
3267 /* Now modify the instruction as appropriate. */
3268 /* To turn a leal into a movl in the form we use it, it
3269 suffices to change the first byte from 0x8d to 0x8b.
3270 aoliva FIXME: should we decide to keep the leal, all
3271 we have to do is remove the statement below, and
3272 adjust the relaxation of R_386_TLS_DESC_CALL. */
3273 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3274
3275 if (tls_type == GOT_TLS_IE_BOTH)
3276 off += 4;
3277
3278 bfd_put_32 (output_bfd,
3279 htab->elf.sgot->output_section->vma
3280 + htab->elf.sgot->output_offset + off
3281 - htab->elf.sgotplt->output_section->vma
3282 - htab->elf.sgotplt->output_offset,
3283 contents + roff);
3284 continue;
3285 }
3286 else if (r_type == R_386_TLS_DESC_CALL)
3287 {
3288 /* GDesc -> IE transition.
3289 It's originally:
3290 call *(%eax)
3291
3292 Change it to:
3293 xchg %ax,%ax
3294 or
3295 negl %eax
3296 depending on how we transformed the TLS_GOTDESC above.
3297 */
3298
3299 bfd_vma roff;
3300
3301 roff = rel->r_offset;
3302
3303 /* Now modify the instruction as appropriate. */
3304 if (tls_type != GOT_TLS_IE_NEG)
3305 {
3306 /* xchg %ax,%ax */
3307 bfd_put_8 (output_bfd, 0x66, contents + roff);
3308 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3309 }
3310 else
3311 {
3312 /* negl %eax */
3313 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3314 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3315 }
3316
3317 continue;
3318 }
3319 else
3320 BFD_ASSERT (FALSE);
3321 break;
3322
3323 case R_386_TLS_LDM:
3324 if (! elf_i386_tls_transition (info, input_bfd,
3325 input_section, contents,
3326 symtab_hdr, sym_hashes,
3327 &r_type, GOT_UNKNOWN, rel,
3328 relend, h, r_symndx, TRUE))
3329 return FALSE;
3330
3331 if (r_type != R_386_TLS_LDM)
3332 {
3333 /* LD->LE transition. Change
3334 leal foo@tlsldm(%ebx) %eax
3335 call ___tls_get_addr@PLT
3336 into:
3337 movl %gs:0, %eax
3338 nop
3339 leal 0(%esi,1), %esi
3340 or change
3341 leal foo@tlsldm(%reg) %eax
3342 call *___tls_get_addr@GOT(%reg)
3343 which may be converted to
3344 addr32 call ___tls_get_addr
3345 into:
3346 movl %gs:0, %eax
3347 leal 0(%esi), %esi */
3348 BFD_ASSERT (r_type == R_386_TLS_LE_32);
3349 if (*(contents + rel->r_offset + 4) == 0xff
3350 || *(contents + rel->r_offset + 4) == 0x67)
3351 memcpy (contents + rel->r_offset - 2,
3352 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3353 else
3354 memcpy (contents + rel->r_offset - 2,
3355 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3356 /* Skip R_386_PC32/R_386_PLT32. */
3357 rel++;
3358 wrel++;
3359 continue;
3360 }
3361
3362 if (htab->elf.sgot == NULL)
3363 abort ();
3364
3365 off = htab->tls_ld_or_ldm_got.offset;
3366 if (off & 1)
3367 off &= ~1;
3368 else
3369 {
3370 Elf_Internal_Rela outrel;
3371
3372 if (htab->elf.srelgot == NULL)
3373 abort ();
3374
3375 outrel.r_offset = (htab->elf.sgot->output_section->vma
3376 + htab->elf.sgot->output_offset + off);
3377
3378 bfd_put_32 (output_bfd, 0,
3379 htab->elf.sgot->contents + off);
3380 bfd_put_32 (output_bfd, 0,
3381 htab->elf.sgot->contents + off + 4);
3382 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3383 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
3384 htab->tls_ld_or_ldm_got.offset |= 1;
3385 }
3386 relocation = htab->elf.sgot->output_section->vma
3387 + htab->elf.sgot->output_offset + off
3388 - htab->elf.sgotplt->output_section->vma
3389 - htab->elf.sgotplt->output_offset;
3390 unresolved_reloc = FALSE;
3391 break;
3392
3393 case R_386_TLS_LDO_32:
3394 if (!bfd_link_executable (info)
3395 || (input_section->flags & SEC_CODE) == 0)
3396 relocation -= _bfd_x86_elf_dtpoff_base (info);
3397 else
3398 /* When converting LDO to LE, we must negate. */
3399 relocation = -elf_i386_tpoff (info, relocation);
3400 break;
3401
3402 case R_386_TLS_LE_32:
3403 case R_386_TLS_LE:
3404 if (!bfd_link_executable (info))
3405 {
3406 Elf_Internal_Rela outrel;
3407 asection *sreloc;
3408
3409 outrel.r_offset = rel->r_offset
3410 + input_section->output_section->vma
3411 + input_section->output_offset;
3412 if (h != NULL && h->dynindx != -1)
3413 indx = h->dynindx;
3414 else
3415 indx = 0;
3416 if (r_type == R_386_TLS_LE_32)
3417 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3418 else
3419 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3420 sreloc = elf_section_data (input_section)->sreloc;
3421 if (sreloc == NULL)
3422 abort ();
3423 elf_append_rel (output_bfd, sreloc, &outrel);
3424 if (indx)
3425 continue;
3426 else if (r_type == R_386_TLS_LE_32)
3427 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
3428 else
3429 relocation -= _bfd_x86_elf_dtpoff_base (info);
3430 }
3431 else if (r_type == R_386_TLS_LE_32)
3432 relocation = elf_i386_tpoff (info, relocation);
3433 else
3434 relocation = -elf_i386_tpoff (info, relocation);
3435 break;
3436
3437 default:
3438 break;
3439 }
3440
3441 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3442 because such sections are not SEC_ALLOC and thus ld.so will
3443 not process them. */
3444 if (unresolved_reloc
3445 && !((input_section->flags & SEC_DEBUGGING) != 0
3446 && h->def_dynamic)
3447 && _bfd_elf_section_offset (output_bfd, info, input_section,
3448 rel->r_offset) != (bfd_vma) -1)
3449 {
3450 _bfd_error_handler
3451 /* xgettext:c-format */
3452 (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
3453 input_bfd,
3454 input_section,
3455 (uint64_t) rel->r_offset,
3456 howto->name,
3457 h->root.root.string);
3458 return FALSE;
3459 }
3460
3461 do_relocation:
3462 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3463 contents, rel->r_offset,
3464 relocation, 0);
3465
3466 check_relocation_error:
3467 if (r != bfd_reloc_ok)
3468 {
3469 const char *name;
3470
3471 if (h != NULL)
3472 name = h->root.root.string;
3473 else
3474 {
3475 name = bfd_elf_string_from_elf_section (input_bfd,
3476 symtab_hdr->sh_link,
3477 sym->st_name);
3478 if (name == NULL)
3479 return FALSE;
3480 if (*name == '\0')
3481 name = bfd_section_name (input_bfd, sec);
3482 }
3483
3484 if (r == bfd_reloc_overflow)
3485 (*info->callbacks->reloc_overflow)
3486 (info, (h ? &h->root : NULL), name, howto->name,
3487 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3488 else
3489 {
3490 _bfd_error_handler
3491 /* xgettext:c-format */
3492 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3493 input_bfd, input_section,
3494 (uint64_t) rel->r_offset, name, (int) r);
3495 return FALSE;
3496 }
3497 }
3498
3499 if (wrel != rel)
3500 *wrel = *rel;
3501 }
3502
3503 if (wrel != rel)
3504 {
3505 Elf_Internal_Shdr *rel_hdr;
3506 size_t deleted = rel - wrel;
3507
3508 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3509 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3510 if (rel_hdr->sh_size == 0)
3511 {
3512 /* It is too late to remove an empty reloc section. Leave
3513 one NONE reloc.
3514 ??? What is wrong with an empty section??? */
3515 rel_hdr->sh_size = rel_hdr->sh_entsize;
3516 deleted -= 1;
3517 }
3518 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3519 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3520 input_section->reloc_count -= deleted;
3521 }
3522
3523 return TRUE;
3524 }
3525
3526 /* Finish up dynamic symbol handling. We set the contents of various
3527 dynamic sections here. */
3528
3529 static bfd_boolean
3530 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3531 struct bfd_link_info *info,
3532 struct elf_link_hash_entry *h,
3533 Elf_Internal_Sym *sym)
3534 {
3535 struct elf_x86_link_hash_table *htab;
3536 unsigned plt_entry_size;
3537 struct elf_x86_link_hash_entry *eh;
3538 bfd_boolean local_undefweak;
3539 bfd_boolean use_plt_second;
3540
3541 htab = elf_x86_hash_table (info, I386_ELF_DATA);
3542 if (htab == NULL)
3543 return FALSE;
3544
3545 plt_entry_size = htab->plt.plt_entry_size;
3546
3547 /* Use the second PLT section only if there is .plt section. */
3548 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3549
3550 eh = (struct elf_x86_link_hash_entry *) h;
3551 if (eh->no_finish_dynamic_symbol)
3552 abort ();
3553
3554 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3555 resolved undefined weak symbols in executable so that their
3556 references have value 0 at run-time. */
3557 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
3558
3559 if (h->plt.offset != (bfd_vma) -1)
3560 {
3561 bfd_vma plt_index, plt_offset;
3562 bfd_vma got_offset;
3563 Elf_Internal_Rela rel;
3564 bfd_byte *loc;
3565 asection *plt, *resolved_plt, *gotplt, *relplt;
3566
3567 /* When building a static executable, use .iplt, .igot.plt and
3568 .rel.iplt sections for STT_GNU_IFUNC symbols. */
3569 if (htab->elf.splt != NULL)
3570 {
3571 plt = htab->elf.splt;
3572 gotplt = htab->elf.sgotplt;
3573 relplt = htab->elf.srelplt;
3574 }
3575 else
3576 {
3577 plt = htab->elf.iplt;
3578 gotplt = htab->elf.igotplt;
3579 relplt = htab->elf.irelplt;
3580 }
3581
3582 VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
3583
3584 /* Get the index in the procedure linkage table which
3585 corresponds to this symbol. This is the index of this symbol
3586 in all the symbols for which we are making plt entries. The
3587 first entry in the procedure linkage table is reserved.
3588
3589 Get the offset into the .got table of the entry that
3590 corresponds to this function. Each .got entry is 4 bytes.
3591 The first three are reserved.
3592
3593 For static executables, we don't reserve anything. */
3594
3595 if (plt == htab->elf.splt)
3596 {
3597 got_offset = (h->plt.offset / plt_entry_size
3598 - htab->plt.has_plt0);
3599 got_offset = (got_offset + 3) * 4;
3600 }
3601 else
3602 {
3603 got_offset = h->plt.offset / plt_entry_size;
3604 got_offset = got_offset * 4;
3605 }
3606
3607 /* Fill in the entry in the procedure linkage table and update
3608 the first slot. */
3609 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
3610 plt_entry_size);
3611
3612 if (use_plt_second)
3613 {
3614 const bfd_byte *plt_entry;
3615 if (bfd_link_pic (info))
3616 plt_entry = htab->non_lazy_plt->pic_plt_entry;
3617 else
3618 plt_entry = htab->non_lazy_plt->plt_entry;
3619 memcpy (htab->plt_second->contents + eh->plt_second.offset,
3620 plt_entry, htab->non_lazy_plt->plt_entry_size);
3621
3622 resolved_plt = htab->plt_second;
3623 plt_offset = eh->plt_second.offset;
3624 }
3625 else
3626 {
3627 resolved_plt = plt;
3628 plt_offset = h->plt.offset;
3629 }
3630
3631 if (! bfd_link_pic (info))
3632 {
3633 bfd_put_32 (output_bfd,
3634 (gotplt->output_section->vma
3635 + gotplt->output_offset
3636 + got_offset),
3637 resolved_plt->contents + plt_offset
3638 + htab->plt.plt_got_offset);
3639
3640 if (htab->target_os == is_vxworks)
3641 {
3642 int s, k, reloc_index;
3643
3644 /* Create the R_386_32 relocation referencing the GOT
3645 for this PLT entry. */
3646
3647 /* S: Current slot number (zero-based). */
3648 s = ((h->plt.offset - htab->plt.plt_entry_size)
3649 / htab->plt.plt_entry_size);
3650 /* K: Number of relocations for PLTResolve. */
3651 if (bfd_link_pic (info))
3652 k = PLTRESOLVE_RELOCS_SHLIB;
3653 else
3654 k = PLTRESOLVE_RELOCS;
3655 /* Skip the PLTresolve relocations, and the relocations for
3656 the other PLT slots. */
3657 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3658 loc = (htab->srelplt2->contents + reloc_index
3659 * sizeof (Elf32_External_Rel));
3660
3661 rel.r_offset = (plt->output_section->vma
3662 + plt->output_offset
3663 + h->plt.offset + 2),
3664 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3665 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3666
3667 /* Create the R_386_32 relocation referencing the beginning of
3668 the PLT for this GOT entry. */
3669 rel.r_offset = (htab->elf.sgotplt->output_section->vma
3670 + htab->elf.sgotplt->output_offset
3671 + got_offset);
3672 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3673 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3674 loc + sizeof (Elf32_External_Rel));
3675 }
3676 }
3677 else
3678 {
3679 bfd_put_32 (output_bfd, got_offset,
3680 resolved_plt->contents + plt_offset
3681 + htab->plt.plt_got_offset);
3682 }
3683
3684 /* Fill in the entry in the global offset table. Leave the entry
3685 as zero for undefined weak symbol in PIE. No PLT relocation
3686 against undefined weak symbol in PIE. */
3687 if (!local_undefweak)
3688 {
3689 if (htab->plt.has_plt0)
3690 bfd_put_32 (output_bfd,
3691 (plt->output_section->vma
3692 + plt->output_offset
3693 + h->plt.offset
3694 + htab->lazy_plt->plt_lazy_offset),
3695 gotplt->contents + got_offset);
3696
3697 /* Fill in the entry in the .rel.plt section. */
3698 rel.r_offset = (gotplt->output_section->vma
3699 + gotplt->output_offset
3700 + got_offset);
3701 if (PLT_LOCAL_IFUNC_P (info, h))
3702 {
3703 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3704 h->root.root.string,
3705 h->root.u.def.section->owner);
3706
3707 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3708 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3709 in the .got.plt section. */
3710 bfd_put_32 (output_bfd,
3711 (h->root.u.def.value
3712 + h->root.u.def.section->output_section->vma
3713 + h->root.u.def.section->output_offset),
3714 gotplt->contents + got_offset);
3715 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3716 /* R_386_IRELATIVE comes last. */
3717 plt_index = htab->next_irelative_index--;
3718 }
3719 else
3720 {
3721 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3722 plt_index = htab->next_jump_slot_index++;
3723 }
3724
3725 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3726 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3727
3728 /* Don't fill the second and third slots in PLT entry for
3729 static executables nor without PLT0. */
3730 if (plt == htab->elf.splt && htab->plt.has_plt0)
3731 {
3732 bfd_put_32 (output_bfd,
3733 plt_index * sizeof (Elf32_External_Rel),
3734 plt->contents + h->plt.offset
3735 + htab->lazy_plt->plt_reloc_offset);
3736 bfd_put_32 (output_bfd,
3737 - (h->plt.offset
3738 + htab->lazy_plt->plt_plt_offset + 4),
3739 (plt->contents + h->plt.offset
3740 + htab->lazy_plt->plt_plt_offset));
3741 }
3742 }
3743 }
3744 else if (eh->plt_got.offset != (bfd_vma) -1)
3745 {
3746 bfd_vma got_offset, plt_offset;
3747 asection *plt, *got, *gotplt;
3748 const bfd_byte *got_plt_entry;
3749
3750 /* Set the entry in the GOT procedure linkage table. */
3751 plt = htab->plt_got;
3752 got = htab->elf.sgot;
3753 gotplt = htab->elf.sgotplt;
3754 got_offset = h->got.offset;
3755
3756 if (got_offset == (bfd_vma) -1
3757 || plt == NULL
3758 || got == NULL
3759 || gotplt == NULL)
3760 abort ();
3761
3762 /* Fill in the entry in the GOT procedure linkage table. */
3763 if (! bfd_link_pic (info))
3764 {
3765 got_plt_entry = htab->non_lazy_plt->plt_entry;
3766 got_offset += got->output_section->vma + got->output_offset;
3767 }
3768 else
3769 {
3770 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
3771 got_offset += (got->output_section->vma
3772 + got->output_offset
3773 - gotplt->output_section->vma
3774 - gotplt->output_offset);
3775 }
3776
3777 plt_offset = eh->plt_got.offset;
3778 memcpy (plt->contents + plt_offset, got_plt_entry,
3779 htab->non_lazy_plt->plt_entry_size);
3780 bfd_put_32 (output_bfd, got_offset,
3781 (plt->contents + plt_offset
3782 + htab->non_lazy_plt->plt_got_offset));
3783 }
3784
3785 if (!local_undefweak
3786 && !h->def_regular
3787 && (h->plt.offset != (bfd_vma) -1
3788 || eh->plt_got.offset != (bfd_vma) -1))
3789 {
3790 /* Mark the symbol as undefined, rather than as defined in
3791 the .plt section. Leave the value if there were any
3792 relocations where pointer equality matters (this is a clue
3793 for the dynamic linker, to make function pointer
3794 comparisons work between an application and shared
3795 library), otherwise set it to zero. If a function is only
3796 called from a binary, there is no need to slow down
3797 shared libraries because of that. */
3798 sym->st_shndx = SHN_UNDEF;
3799 if (!h->pointer_equality_needed)
3800 sym->st_value = 0;
3801 }
3802
3803 /* Don't generate dynamic GOT relocation against undefined weak
3804 symbol in executable. */
3805 if (h->got.offset != (bfd_vma) -1
3806 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3807 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
3808 && !local_undefweak)
3809 {
3810 Elf_Internal_Rela rel;
3811 asection *relgot = htab->elf.srelgot;
3812
3813 /* This symbol has an entry in the global offset table. Set it
3814 up. */
3815
3816 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3817 abort ();
3818
3819 rel.r_offset = (htab->elf.sgot->output_section->vma
3820 + htab->elf.sgot->output_offset
3821 + (h->got.offset & ~(bfd_vma) 1));
3822
3823 /* If this is a static link, or it is a -Bsymbolic link and the
3824 symbol is defined locally or was forced to be local because
3825 of a version file, we just want to emit a RELATIVE reloc.
3826 The entry in the global offset table will already have been
3827 initialized in the relocate_section function. */
3828 if (h->def_regular
3829 && h->type == STT_GNU_IFUNC)
3830 {
3831 if (h->plt.offset == (bfd_vma) -1)
3832 {
3833 /* STT_GNU_IFUNC is referenced without PLT. */
3834 if (htab->elf.splt == NULL)
3835 {
3836 /* use .rel[a].iplt section to store .got relocations
3837 in static executable. */
3838 relgot = htab->elf.irelplt;
3839 }
3840 if (SYMBOL_REFERENCES_LOCAL_P (info, h))
3841 {
3842 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3843 h->root.root.string,
3844 h->root.u.def.section->owner);
3845
3846 bfd_put_32 (output_bfd,
3847 (h->root.u.def.value
3848 + h->root.u.def.section->output_section->vma
3849 + h->root.u.def.section->output_offset),
3850 htab->elf.sgot->contents + h->got.offset);
3851 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3852 }
3853 else
3854 goto do_glob_dat;
3855 }
3856 else if (bfd_link_pic (info))
3857 {
3858 /* Generate R_386_GLOB_DAT. */
3859 goto do_glob_dat;
3860 }
3861 else
3862 {
3863 asection *plt;
3864 bfd_vma plt_offset;
3865
3866 if (!h->pointer_equality_needed)
3867 abort ();
3868
3869 /* For non-shared object, we can't use .got.plt, which
3870 contains the real function addres if we need pointer
3871 equality. We load the GOT entry with the PLT entry. */
3872 if (htab->plt_second != NULL)
3873 {
3874 plt = htab->plt_second;
3875 plt_offset = eh->plt_second.offset;
3876 }
3877 else
3878 {
3879 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3880 plt_offset = h->plt.offset;
3881 }
3882 bfd_put_32 (output_bfd,
3883 (plt->output_section->vma
3884 + plt->output_offset + plt_offset),
3885 htab->elf.sgot->contents + h->got.offset);
3886 return TRUE;
3887 }
3888 }
3889 else if (bfd_link_pic (info)
3890 && SYMBOL_REFERENCES_LOCAL_P (info, h))
3891 {
3892 BFD_ASSERT((h->got.offset & 1) != 0);
3893 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3894 }
3895 else
3896 {
3897 BFD_ASSERT((h->got.offset & 1) == 0);
3898 do_glob_dat:
3899 bfd_put_32 (output_bfd, (bfd_vma) 0,
3900 htab->elf.sgot->contents + h->got.offset);
3901 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3902 }
3903
3904 elf_append_rel (output_bfd, relgot, &rel);
3905 }
3906
3907 if (h->needs_copy)
3908 {
3909 Elf_Internal_Rela rel;
3910 asection *s;
3911
3912 /* This symbol needs a copy reloc. Set it up. */
3913 VERIFY_COPY_RELOC (h, htab)
3914
3915 rel.r_offset = (h->root.u.def.value
3916 + h->root.u.def.section->output_section->vma
3917 + h->root.u.def.section->output_offset);
3918 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3919 if (h->root.u.def.section == htab->elf.sdynrelro)
3920 s = htab->elf.sreldynrelro;
3921 else
3922 s = htab->elf.srelbss;
3923 elf_append_rel (output_bfd, s, &rel);
3924 }
3925
3926 return TRUE;
3927 }
3928
3929 /* Finish up local dynamic symbol handling. We set the contents of
3930 various dynamic sections here. */
3931
3932 static bfd_boolean
3933 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
3934 {
3935 struct elf_link_hash_entry *h
3936 = (struct elf_link_hash_entry *) *slot;
3937 struct bfd_link_info *info
3938 = (struct bfd_link_info *) inf;
3939
3940 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
3941 h, NULL);
3942 }
3943
3944 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
3945 here since undefined weak symbol may not be dynamic and may not be
3946 called for elf_i386_finish_dynamic_symbol. */
3947
3948 static bfd_boolean
3949 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
3950 void *inf)
3951 {
3952 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
3953 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3954
3955 if (h->root.type != bfd_link_hash_undefweak
3956 || h->dynindx != -1)
3957 return TRUE;
3958
3959 return elf_i386_finish_dynamic_symbol (info->output_bfd,
3960 info, h, NULL);
3961 }
3962
3963 /* Used to decide how to sort relocs in an optimal manner for the
3964 dynamic linker, before writing them out. */
3965
3966 static enum elf_reloc_type_class
3967 elf_i386_reloc_type_class (const struct bfd_link_info *info,
3968 const asection *rel_sec ATTRIBUTE_UNUSED,
3969 const Elf_Internal_Rela *rela)
3970 {
3971 bfd *abfd = info->output_bfd;
3972 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3973 struct elf_link_hash_table *htab = elf_hash_table (info);
3974
3975 if (htab->dynsym != NULL
3976 && htab->dynsym->contents != NULL)
3977 {
3978 /* Check relocation against STT_GNU_IFUNC symbol if there are
3979 dynamic symbols. */
3980 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3981 if (r_symndx != STN_UNDEF)
3982 {
3983 Elf_Internal_Sym sym;
3984 if (!bed->s->swap_symbol_in (abfd,
3985 (htab->dynsym->contents
3986 + r_symndx * sizeof (Elf32_External_Sym)),
3987 0, &sym))
3988 abort ();
3989
3990 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3991 return reloc_class_ifunc;
3992 }
3993 }
3994
3995 switch (ELF32_R_TYPE (rela->r_info))
3996 {
3997 case R_386_IRELATIVE:
3998 return reloc_class_ifunc;
3999 case R_386_RELATIVE:
4000 return reloc_class_relative;
4001 case R_386_JUMP_SLOT:
4002 return reloc_class_plt;
4003 case R_386_COPY:
4004 return reloc_class_copy;
4005 default:
4006 return reloc_class_normal;
4007 }
4008 }
4009
4010 /* Finish up the dynamic sections. */
4011
4012 static bfd_boolean
4013 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4014 struct bfd_link_info *info)
4015 {
4016 struct elf_x86_link_hash_table *htab;
4017
4018 htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
4019 if (htab == NULL)
4020 return FALSE;
4021
4022 if (!htab->elf.dynamic_sections_created)
4023 return TRUE;
4024
4025 if (htab->elf.splt && htab->elf.splt->size > 0)
4026 {
4027 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4028 really seem like the right value. */
4029 elf_section_data (htab->elf.splt->output_section)
4030 ->this_hdr.sh_entsize = 4;
4031
4032 if (htab->plt.has_plt0)
4033 {
4034 /* Fill in the special first entry in the procedure linkage
4035 table. */
4036 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
4037 htab->lazy_plt->plt0_entry_size);
4038 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
4039 htab->plt0_pad_byte,
4040 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
4041 if (!bfd_link_pic (info))
4042 {
4043 bfd_put_32 (output_bfd,
4044 (htab->elf.sgotplt->output_section->vma
4045 + htab->elf.sgotplt->output_offset
4046 + 4),
4047 htab->elf.splt->contents
4048 + htab->lazy_plt->plt0_got1_offset);
4049 bfd_put_32 (output_bfd,
4050 (htab->elf.sgotplt->output_section->vma
4051 + htab->elf.sgotplt->output_offset
4052 + 8),
4053 htab->elf.splt->contents
4054 + htab->lazy_plt->plt0_got2_offset);
4055
4056 if (htab->target_os == is_vxworks)
4057 {
4058 Elf_Internal_Rela rel;
4059 int num_plts = (htab->elf.splt->size
4060 / htab->plt.plt_entry_size) - 1;
4061 unsigned char *p;
4062 asection *srelplt2 = htab->srelplt2;
4063
4064 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4065 + 4. On IA32 we use REL relocations so the
4066 addend goes in the PLT directly. */
4067 rel.r_offset = (htab->elf.splt->output_section->vma
4068 + htab->elf.splt->output_offset
4069 + htab->lazy_plt->plt0_got1_offset);
4070 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4071 R_386_32);
4072 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4073 srelplt2->contents);
4074 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4075 + 8. */
4076 rel.r_offset = (htab->elf.splt->output_section->vma
4077 + htab->elf.splt->output_offset
4078 + htab->lazy_plt->plt0_got2_offset);
4079 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4080 R_386_32);
4081 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4082 srelplt2->contents +
4083 sizeof (Elf32_External_Rel));
4084 /* Correct the .rel.plt.unloaded relocations. */
4085 p = srelplt2->contents;
4086 if (bfd_link_pic (info))
4087 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4088 else
4089 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4090
4091 for (; num_plts; num_plts--)
4092 {
4093 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4094 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4095 R_386_32);
4096 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4097 p += sizeof (Elf32_External_Rel);
4098
4099 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4100 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4101 R_386_32);
4102 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4103 p += sizeof (Elf32_External_Rel);
4104 }
4105 }
4106 }
4107 }
4108 }
4109
4110 /* Fill PLT entries for undefined weak symbols in PIE. */
4111 if (bfd_link_pie (info))
4112 bfd_hash_traverse (&info->hash->table,
4113 elf_i386_pie_finish_undefweak_symbol,
4114 info);
4115
4116 return TRUE;
4117 }
4118
4119 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4120 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4121 It has to be done before elf_link_sort_relocs is called so that
4122 dynamic relocations are properly sorted. */
4123
4124 static bfd_boolean
4125 elf_i386_output_arch_local_syms
4126 (bfd *output_bfd ATTRIBUTE_UNUSED,
4127 struct bfd_link_info *info,
4128 void *flaginfo ATTRIBUTE_UNUSED,
4129 int (*func) (void *, const char *,
4130 Elf_Internal_Sym *,
4131 asection *,
4132 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4133 {
4134 struct elf_x86_link_hash_table *htab
4135 = elf_x86_hash_table (info, I386_ELF_DATA);
4136 if (htab == NULL)
4137 return FALSE;
4138
4139 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4140 htab_traverse (htab->loc_hash_table,
4141 elf_i386_finish_local_dynamic_symbol,
4142 info);
4143
4144 return TRUE;
4145 }
4146
4147 /* Forward declaration. */
4148 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
4149
4150 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4151 dynamic relocations. */
4152
4153 static long
4154 elf_i386_get_synthetic_symtab (bfd *abfd,
4155 long symcount ATTRIBUTE_UNUSED,
4156 asymbol **syms ATTRIBUTE_UNUSED,
4157 long dynsymcount,
4158 asymbol **dynsyms,
4159 asymbol **ret)
4160 {
4161 long count, i, n;
4162 int j;
4163 bfd_byte *plt_contents;
4164 long relsize;
4165 const struct elf_x86_lazy_plt_layout *lazy_plt;
4166 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4167 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4168 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
4169 asection *plt;
4170 bfd_vma got_addr;
4171 enum elf_x86_plt_type plt_type;
4172 struct elf_x86_plt plts[] =
4173 {
4174 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4175 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4176 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4177 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
4178 };
4179
4180 *ret = NULL;
4181
4182 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4183 return 0;
4184
4185 if (dynsymcount <= 0)
4186 return 0;
4187
4188 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4189 if (relsize <= 0)
4190 return -1;
4191
4192 non_lazy_plt = NULL;
4193 /* Silence GCC 6. */
4194 lazy_plt = NULL;
4195 non_lazy_ibt_plt = NULL;
4196 lazy_ibt_plt = NULL;
4197 switch (get_elf_x86_backend_data (abfd)->target_os)
4198 {
4199 case is_normal:
4200 case is_solaris:
4201 non_lazy_plt = &elf_i386_non_lazy_plt;
4202 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4203 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4204 /* Fall through */
4205 case is_vxworks:
4206 lazy_plt = &elf_i386_lazy_plt;
4207 break;
4208 case is_nacl:
4209 lazy_plt = &elf_i386_nacl_plt;
4210 break;
4211 }
4212
4213 got_addr = 0;
4214
4215 count = 0;
4216 for (j = 0; plts[j].name != NULL; j++)
4217 {
4218 plt = bfd_get_section_by_name (abfd, plts[j].name);
4219 if (plt == NULL || plt->size == 0)
4220 continue;
4221
4222 /* Get the PLT section contents. */
4223 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4224 if (plt_contents == NULL)
4225 break;
4226 if (!bfd_get_section_contents (abfd, (asection *) plt,
4227 plt_contents, 0, plt->size))
4228 {
4229 free (plt_contents);
4230 break;
4231 }
4232
4233 /* Check what kind of PLT it is. */
4234 plt_type = plt_unknown;
4235 if (plts[j].type == plt_unknown
4236 && (plt->size >= (lazy_plt->plt0_entry_size
4237 + lazy_plt->plt_entry_size)))
4238 {
4239 /* Match lazy PLT first. */
4240 if (memcmp (plt_contents, lazy_plt->plt0_entry,
4241 lazy_plt->plt0_got1_offset) == 0)
4242 {
4243 /* The fist entry in the lazy IBT PLT is the same as the
4244 normal lazy PLT. */
4245 if (lazy_ibt_plt != NULL
4246 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4247 lazy_ibt_plt->plt_entry,
4248 lazy_ibt_plt->plt_got_offset) == 0))
4249 plt_type = plt_lazy | plt_second;
4250 else
4251 plt_type = plt_lazy;
4252 }
4253 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4254 lazy_plt->plt0_got1_offset) == 0)
4255 {
4256 /* The fist entry in the PIC lazy IBT PLT is the same as
4257 the normal PIC lazy PLT. */
4258 if (lazy_ibt_plt != NULL
4259 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4260 lazy_ibt_plt->pic_plt_entry,
4261 lazy_ibt_plt->plt_got_offset) == 0))
4262 plt_type = plt_lazy | plt_pic | plt_second;
4263 else
4264 plt_type = plt_lazy | plt_pic;
4265 }
4266 }
4267
4268 if (non_lazy_plt != NULL
4269 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4270 && plt->size >= non_lazy_plt->plt_entry_size)
4271 {
4272 /* Match non-lazy PLT. */
4273 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4274 non_lazy_plt->plt_got_offset) == 0)
4275 plt_type = plt_non_lazy;
4276 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4277 non_lazy_plt->plt_got_offset) == 0)
4278 plt_type = plt_pic;
4279 }
4280
4281 if ((non_lazy_ibt_plt != NULL)
4282 && (plt_type == plt_unknown || plt_type == plt_second)
4283 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
4284 {
4285 if (memcmp (plt_contents,
4286 non_lazy_ibt_plt->plt_entry,
4287 non_lazy_ibt_plt->plt_got_offset) == 0)
4288 {
4289 /* Match IBT PLT. */
4290 plt_type = plt_second;
4291 non_lazy_plt = non_lazy_ibt_plt;
4292 }
4293 else if (memcmp (plt_contents,
4294 non_lazy_ibt_plt->pic_plt_entry,
4295 non_lazy_ibt_plt->plt_got_offset) == 0)
4296 {
4297 /* Match PIC IBT PLT. */
4298 plt_type = plt_second | plt_pic;
4299 non_lazy_plt = non_lazy_ibt_plt;
4300 }
4301 }
4302
4303 if (plt_type == plt_unknown)
4304 {
4305 free (plt_contents);
4306 continue;
4307 }
4308
4309 plts[j].sec = plt;
4310 plts[j].type = plt_type;
4311
4312 if ((plt_type & plt_lazy))
4313 {
4314 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4315 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4316 /* Skip PLT0 in lazy PLT. */
4317 i = 1;
4318 }
4319 else
4320 {
4321 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4322 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4323 i = 0;
4324 }
4325
4326 /* Skip lazy PLT when the second PLT is used. */
4327 if ((plt_type & (plt_lazy | plt_second))
4328 == (plt_lazy | plt_second))
4329 plts[j].count = 0;
4330 else
4331 {
4332 n = plt->size / plts[j].plt_entry_size;
4333 plts[j].count = n;
4334 count += n - i;
4335 }
4336
4337 plts[j].contents = plt_contents;
4338
4339 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4340 if ((plt_type & plt_pic))
4341 got_addr = (bfd_vma) -1;
4342 }
4343
4344 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4345 got_addr, plts, dynsyms,
4346 ret);
4347 }
4348
4349 /* Set up i386 GNU properties. Return the first relocatable ELF input
4350 with GNU properties if found. Otherwise, return NULL. */
4351
4352 static bfd *
4353 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4354 {
4355 struct elf_x86_init_table init_table;
4356
4357 switch (get_elf_x86_backend_data (info->output_bfd)->target_os)
4358 {
4359 case is_normal:
4360 case is_solaris:
4361 init_table.plt0_pad_byte = 0x0;
4362 init_table.lazy_plt = &elf_i386_lazy_plt;
4363 init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4364 init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4365 init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4366 break;
4367 case is_vxworks:
4368 init_table.plt0_pad_byte = 0x90;
4369 init_table.lazy_plt = &elf_i386_lazy_plt;
4370 init_table.non_lazy_plt = NULL;
4371 init_table.lazy_ibt_plt = NULL;
4372 init_table.non_lazy_ibt_plt = NULL;
4373 break;
4374 case is_nacl:
4375 init_table.plt0_pad_byte = 0x90;
4376 init_table.lazy_plt = &elf_i386_nacl_plt;
4377 init_table.non_lazy_plt = NULL;
4378 init_table.lazy_ibt_plt = NULL;
4379 init_table.non_lazy_ibt_plt = NULL;
4380 break;
4381 }
4382
4383 init_table.r_info = elf32_r_info;
4384 init_table.r_sym = elf32_r_sym;
4385
4386 return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
4387 }
4388
4389 #define TARGET_LITTLE_SYM i386_elf32_vec
4390 #define TARGET_LITTLE_NAME "elf32-i386"
4391 #define ELF_ARCH bfd_arch_i386
4392 #define ELF_TARGET_ID I386_ELF_DATA
4393 #define ELF_MACHINE_CODE EM_386
4394 #define ELF_MAXPAGESIZE 0x1000
4395
4396 #define elf_backend_can_gc_sections 1
4397 #define elf_backend_can_refcount 1
4398 #define elf_backend_want_got_plt 1
4399 #define elf_backend_plt_readonly 1
4400 #define elf_backend_want_plt_sym 0
4401 #define elf_backend_got_header_size 12
4402 #define elf_backend_plt_alignment 4
4403 #define elf_backend_dtrel_excludes_plt 1
4404 #define elf_backend_extern_protected_data 1
4405 #define elf_backend_caches_rawsize 1
4406 #define elf_backend_want_dynrelro 1
4407
4408 /* Support RELA for objdump of prelink objects. */
4409 #define elf_info_to_howto elf_i386_info_to_howto_rel
4410 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4411
4412 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4413 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4414 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4415 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
4416
4417 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4418 #define elf_backend_check_relocs elf_i386_check_relocs
4419 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4420 #define elf_backend_fake_sections elf_i386_fake_sections
4421 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4422 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4423 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
4424 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4425 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4426 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4427 #define elf_backend_relocate_section elf_i386_relocate_section
4428 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
4429 #define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
4430
4431 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4432
4433 #include "elf32-target.h"
4434
4435 /* FreeBSD support. */
4436
4437 #undef TARGET_LITTLE_SYM
4438 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
4439 #undef TARGET_LITTLE_NAME
4440 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4441 #undef ELF_OSABI
4442 #define ELF_OSABI ELFOSABI_FREEBSD
4443
4444 /* The kernel recognizes executables as valid only if they carry a
4445 "FreeBSD" label in the ELF header. So we put this label on all
4446 executables and (for simplicity) also all other object files. */
4447
4448 static void
4449 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4450 {
4451 _bfd_elf_post_process_headers (abfd, info);
4452
4453 #ifdef OLD_FREEBSD_ABI_LABEL
4454 {
4455 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4456 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4457 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4458 }
4459 #endif
4460 }
4461
4462 #undef elf_backend_post_process_headers
4463 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4464 #undef elf32_bed
4465 #define elf32_bed elf32_i386_fbsd_bed
4466
4467 #undef elf_backend_add_symbol_hook
4468
4469 #include "elf32-target.h"
4470
4471 /* Solaris 2. */
4472
4473 #undef TARGET_LITTLE_SYM
4474 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
4475 #undef TARGET_LITTLE_NAME
4476 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
4477
4478 static const struct elf_x86_backend_data elf_i386_solaris_arch_bed =
4479 {
4480 is_solaris /* os */
4481 };
4482
4483 #undef elf_backend_arch_data
4484 #define elf_backend_arch_data &elf_i386_solaris_arch_bed
4485
4486 #undef elf_backend_post_process_headers
4487
4488 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4489 objects won't be recognized. */
4490 #undef ELF_OSABI
4491
4492 #undef elf32_bed
4493 #define elf32_bed elf32_i386_sol2_bed
4494
4495 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4496 boundary. */
4497 #undef elf_backend_static_tls_alignment
4498 #define elf_backend_static_tls_alignment 8
4499
4500 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4501
4502 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4503 File, p.63. */
4504 #undef elf_backend_want_plt_sym
4505 #define elf_backend_want_plt_sym 1
4506
4507 #undef elf_backend_strtab_flags
4508 #define elf_backend_strtab_flags SHF_STRINGS
4509
4510 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
4511 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
4512 FALSE otherwise. ISECTION is the best guess matching section from the
4513 input bfd IBFD, but it might be NULL. */
4514
4515 static bfd_boolean
4516 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4517 bfd *obfd ATTRIBUTE_UNUSED,
4518 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4519 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
4520 {
4521 /* PR 19938: FIXME: Need to add code for setting the sh_info
4522 and sh_link fields of Solaris specific section types. */
4523 return FALSE;
4524
4525 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
4526 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4527
4528 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4529
4530 The following values should be set:
4531
4532 Type Link Info
4533 -----------------------------------------------------------------------------
4534 SHT_SUNW_ancillary The section header index of 0
4535 [0x6fffffee] the associated string table.
4536
4537 SHT_SUNW_capinfo The section header index of For a dynamic object, the
4538 [0x6ffffff0] the associated symbol table. section header index of
4539 the associated
4540 SHT_SUNW_capchain table,
4541 otherwise 0.
4542
4543 SHT_SUNW_symsort The section header index of 0
4544 [0x6ffffff1] the associated symbol table.
4545
4546 SHT_SUNW_tlssort The section header index of 0
4547 [0x6ffffff2] the associated symbol table.
4548
4549 SHT_SUNW_LDYNSYM The section header index of One greater than the
4550 [0x6ffffff3] the associated string table. symbol table index of the
4551 This index is the same string last local symbol,
4552 table used by the SHT_DYNSYM STB_LOCAL. Since
4553 section. SHT_SUNW_LDYNSYM only
4554 contains local symbols,
4555 sh_info is equivalent to
4556 the number of symbols in
4557 the table.
4558
4559 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4560 [0x6ffffff5] the section header index of to named strings, the
4561 the associated section header index of
4562 SHT_SUNW_capinfo table, the associated string
4563 otherwise 0. table, otherwise 0.
4564
4565 SHT_SUNW_move The section header index of 0
4566 [0x6ffffffa] the associated symbol table.
4567
4568 SHT_SUNW_COMDAT 0 0
4569 [0x6ffffffb]
4570
4571 SHT_SUNW_syminfo The section header index of The section header index
4572 [0x6ffffffc] the associated symbol table. of the associated
4573 .dynamic section.
4574
4575 SHT_SUNW_verdef The section header index of The number of version
4576 [0x6ffffffd] the associated string table. definitions within the
4577 section.
4578
4579 SHT_SUNW_verneed The section header index of The number of version
4580 [0x6ffffffe] the associated string table. dependencies within the
4581 section.
4582
4583 SHT_SUNW_versym The section header index of 0
4584 [0x6fffffff] the associated symbol table. */
4585 }
4586
4587 #undef elf_backend_copy_special_section_fields
4588 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
4589
4590 #include "elf32-target.h"
4591
4592 /* Intel MCU support. */
4593
4594 static bfd_boolean
4595 elf32_iamcu_elf_object_p (bfd *abfd)
4596 {
4597 /* Set the right machine number for an IAMCU elf32 file. */
4598 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4599 return TRUE;
4600 }
4601
4602 #undef TARGET_LITTLE_SYM
4603 #define TARGET_LITTLE_SYM iamcu_elf32_vec
4604 #undef TARGET_LITTLE_NAME
4605 #define TARGET_LITTLE_NAME "elf32-iamcu"
4606 #undef ELF_ARCH
4607 #define ELF_ARCH bfd_arch_iamcu
4608
4609 #undef ELF_MACHINE_CODE
4610 #define ELF_MACHINE_CODE EM_IAMCU
4611
4612 #undef elf_backend_arch_data
4613 #define elf_backend_arch_data &elf_i386_arch_bed
4614
4615 #undef ELF_OSABI
4616
4617 #undef elf32_bed
4618 #define elf32_bed elf32_iamcu_bed
4619
4620 #undef elf_backend_object_p
4621 #define elf_backend_object_p elf32_iamcu_elf_object_p
4622
4623 #undef elf_backend_static_tls_alignment
4624
4625 #undef elf_backend_want_plt_sym
4626 #define elf_backend_want_plt_sym 0
4627
4628 #undef elf_backend_strtab_flags
4629 #undef elf_backend_copy_special_section_fields
4630
4631 #include "elf32-target.h"
4632
4633 /* Restore defaults. */
4634 #undef ELF_ARCH
4635 #define ELF_ARCH bfd_arch_i386
4636 #undef ELF_MACHINE_CODE
4637 #define ELF_MACHINE_CODE EM_386
4638
4639 /* Native Client support. */
4640
4641 #undef TARGET_LITTLE_SYM
4642 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
4643 #undef TARGET_LITTLE_NAME
4644 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
4645 #undef elf32_bed
4646 #define elf32_bed elf32_i386_nacl_bed
4647
4648 #undef ELF_MAXPAGESIZE
4649 #define ELF_MAXPAGESIZE 0x10000
4650
4651 /* Restore defaults. */
4652 #undef ELF_OSABI
4653 #undef elf_backend_want_plt_sym
4654 #define elf_backend_want_plt_sym 0
4655 #undef elf_backend_post_process_headers
4656 #undef elf_backend_static_tls_alignment
4657
4658 /* NaCl uses substantially different PLT entries for the same effects. */
4659
4660 #undef elf_backend_plt_alignment
4661 #define elf_backend_plt_alignment 5
4662 #define NACL_PLT_ENTRY_SIZE 64
4663 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
4664
4665 static const bfd_byte elf_i386_nacl_plt0_entry[] =
4666 {
4667 0xff, 0x35, /* pushl contents of address */
4668 0, 0, 0, 0, /* replaced with address of .got + 4. */
4669 0x8b, 0x0d, /* movl contents of address, %ecx */
4670 0, 0, 0, 0, /* replaced with address of .got + 8. */
4671 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4672 0xff, 0xe1 /* jmp *%ecx */
4673 };
4674
4675 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
4676 {
4677 0x8b, 0x0d, /* movl contents of address, %ecx */
4678 0, 0, 0, 0, /* replaced with GOT slot address. */
4679 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4680 0xff, 0xe1, /* jmp *%ecx */
4681
4682 /* Pad to the next 32-byte boundary with nop instructions. */
4683 0x90,
4684 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4685 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4686
4687 /* Lazy GOT entries point here (32-byte aligned). */
4688 0x68, /* pushl immediate */
4689 0, 0, 0, 0, /* replaced with reloc offset. */
4690 0xe9, /* jmp relative */
4691 0, 0, 0, 0, /* replaced with offset to .plt. */
4692
4693 /* Pad to the next 32-byte boundary with nop instructions. */
4694 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4695 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4696 0x90, 0x90
4697 };
4698
4699 static const bfd_byte
4700 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
4701 {
4702 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
4703 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
4704 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
4705 0xff, 0xe1, /* jmp *%ecx */
4706
4707 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
4708 so pad to that size with nop instructions. */
4709 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
4710 };
4711
4712 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
4713 {
4714 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
4715 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
4716 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
4717 0xff, 0xe1, /* jmp *%ecx */
4718
4719 /* Pad to the next 32-byte boundary with nop instructions. */
4720 0x90,
4721 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4722 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4723
4724 /* Lazy GOT entries point here (32-byte aligned). */
4725 0x68, /* pushl immediate */
4726 0, 0, 0, 0, /* replaced with offset into relocation table. */
4727 0xe9, /* jmp relative */
4728 0, 0, 0, 0, /* replaced with offset to start of .plt. */
4729
4730 /* Pad to the next 32-byte boundary with nop instructions. */
4731 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4732 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4733 0x90, 0x90
4734 };
4735
4736 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
4737 {
4738 #if (PLT_CIE_LENGTH != 20 \
4739 || PLT_FDE_LENGTH != 36 \
4740 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
4741 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
4742 # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
4743 #endif
4744 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
4745 0, 0, 0, 0, /* CIE ID */
4746 1, /* CIE version */
4747 'z', 'R', 0, /* Augmentation string */
4748 1, /* Code alignment factor */
4749 0x7c, /* Data alignment factor: -4 */
4750 8, /* Return address column */
4751 1, /* Augmentation size */
4752 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
4753 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
4754 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
4755 DW_CFA_nop, DW_CFA_nop,
4756
4757 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
4758 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
4759 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
4760 0, 0, 0, 0, /* .plt size goes here */
4761 0, /* Augmentation size */
4762 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
4763 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
4764 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
4765 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
4766 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
4767 13, /* Block length */
4768 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
4769 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
4770 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
4771 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
4772 DW_CFA_nop, DW_CFA_nop
4773 };
4774
4775 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
4776 {
4777 elf_i386_nacl_plt0_entry, /* plt0_entry */
4778 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
4779 elf_i386_nacl_plt_entry, /* plt_entry */
4780 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
4781 2, /* plt0_got1_offset */
4782 8, /* plt0_got2_offset */
4783 0, /* plt0_got2_insn_end */
4784 2, /* plt_got_offset */
4785 33, /* plt_reloc_offset */
4786 38, /* plt_plt_offset */
4787 0, /* plt_got_insn_size */
4788 0, /* plt_plt_insn_end */
4789 32, /* plt_lazy_offset */
4790 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
4791 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
4792 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
4793 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
4794 };
4795
4796 static const struct elf_x86_backend_data elf_i386_nacl_arch_bed =
4797 {
4798 is_nacl /* os */
4799 };
4800
4801 static bfd_boolean
4802 elf32_i386_nacl_elf_object_p (bfd *abfd)
4803 {
4804 /* Set the right machine number for a NaCl i386 ELF32 file. */
4805 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
4806 return TRUE;
4807 }
4808
4809 #undef elf_backend_arch_data
4810 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
4811
4812 #undef elf_backend_object_p
4813 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
4814 #undef elf_backend_modify_segment_map
4815 #define elf_backend_modify_segment_map nacl_modify_segment_map
4816 #undef elf_backend_modify_program_headers
4817 #define elf_backend_modify_program_headers nacl_modify_program_headers
4818 #undef elf_backend_final_write_processing
4819 #define elf_backend_final_write_processing nacl_final_write_processing
4820
4821 #include "elf32-target.h"
4822
4823 /* Restore defaults. */
4824 #undef elf_backend_object_p
4825 #undef elf_backend_modify_segment_map
4826 #undef elf_backend_modify_program_headers
4827 #undef elf_backend_final_write_processing
4828
4829 /* VxWorks support. */
4830
4831 #undef TARGET_LITTLE_SYM
4832 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
4833 #undef TARGET_LITTLE_NAME
4834 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4835 #undef ELF_OSABI
4836 #undef ELF_MAXPAGESIZE
4837 #define ELF_MAXPAGESIZE 0x1000
4838 #undef elf_backend_plt_alignment
4839 #define elf_backend_plt_alignment 4
4840
4841 static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed =
4842 {
4843 is_vxworks /* os */
4844 };
4845
4846 #undef elf_backend_arch_data
4847 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
4848
4849 #undef elf_backend_relocs_compatible
4850 #undef elf_backend_add_symbol_hook
4851 #define elf_backend_add_symbol_hook \
4852 elf_vxworks_add_symbol_hook
4853 #undef elf_backend_link_output_symbol_hook
4854 #define elf_backend_link_output_symbol_hook \
4855 elf_vxworks_link_output_symbol_hook
4856 #undef elf_backend_emit_relocs
4857 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4858 #undef elf_backend_final_write_processing
4859 #define elf_backend_final_write_processing \
4860 elf_vxworks_final_write_processing
4861 #undef elf_backend_static_tls_alignment
4862
4863 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4864 define it. */
4865 #undef elf_backend_want_plt_sym
4866 #define elf_backend_want_plt_sym 1
4867
4868 #undef elf32_bed
4869 #define elf32_bed elf32_i386_vxworks_bed
4870
4871 #include "elf32-target.h"
GDB Binutils - Deliverables
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