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Explicitly include <array> for std::array<>.
[deliverable/binutils-gdb.git] / bfd / elf64-x86-64.c
1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka <jh@suse.cz>.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "elfxx-x86.h"
23 #include "elf-nacl.h"
24 #include "dwarf2.h"
25 #include "libiberty.h"
26
27 #include "opcode/i386.h"
28 #include "elf/x86-64.h"
29
30 #ifdef CORE_HEADER
31 #include <stdarg.h>
32 #include CORE_HEADER
33 #endif
34
35 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
36 #define MINUS_ONE (~ (bfd_vma) 0)
37
38 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
39 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
40 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
41 since they are the same. */
42
43 /* The relocation "howto" table. Order of fields:
44 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
45 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
46 static reloc_howto_type x86_64_elf_howto_table[] =
47 {
48 HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
49 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
50 FALSE),
51 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
52 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
53 FALSE),
54 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
55 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
56 TRUE),
57 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
58 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
59 FALSE),
60 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
61 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
62 TRUE),
63 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
65 FALSE),
66 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
68 MINUS_ONE, FALSE),
69 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
71 MINUS_ONE, FALSE),
72 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
74 MINUS_ONE, FALSE),
75 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
76 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
77 0xffffffff, TRUE),
78 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
79 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
80 FALSE),
81 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
82 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
83 FALSE),
84 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
86 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
88 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
90 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
91 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
92 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
94 MINUS_ONE, FALSE),
95 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
97 MINUS_ONE, FALSE),
98 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
100 MINUS_ONE, FALSE),
101 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
102 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
103 0xffffffff, TRUE),
104 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
105 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
106 0xffffffff, TRUE),
107 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
108 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
109 0xffffffff, FALSE),
110 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
112 0xffffffff, TRUE),
113 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
114 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
115 0xffffffff, FALSE),
116 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
118 TRUE),
119 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
121 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
122 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
123 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
124 FALSE, 0xffffffff, 0xffffffff, TRUE),
125 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
126 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
127 FALSE),
128 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
129 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
130 MINUS_ONE, TRUE),
131 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
132 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
133 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
134 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
135 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
136 MINUS_ONE, FALSE),
137 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
138 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
139 MINUS_ONE, FALSE),
140 HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
141 bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
142 FALSE),
143 HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
144 bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
145 FALSE),
146 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
147 complain_overflow_bitfield, bfd_elf_generic_reloc,
148 "R_X86_64_GOTPC32_TLSDESC",
149 FALSE, 0xffffffff, 0xffffffff, TRUE),
150 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
151 complain_overflow_dont, bfd_elf_generic_reloc,
152 "R_X86_64_TLSDESC_CALL",
153 FALSE, 0, 0, FALSE),
154 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
155 complain_overflow_bitfield, bfd_elf_generic_reloc,
156 "R_X86_64_TLSDESC",
157 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
158 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
160 MINUS_ONE, FALSE),
161 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
163 MINUS_ONE, FALSE),
164 HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
165 bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
166 TRUE),
167 HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
168 bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
169 TRUE),
170 HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
171 bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff,
172 0xffffffff, TRUE),
173 HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
174 bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff,
175 0xffffffff, TRUE),
176
177 /* We have a gap in the reloc numbers here.
178 R_X86_64_standard counts the number up to this point, and
179 R_X86_64_vt_offset is the value to subtract from a reloc type of
180 R_X86_64_GNU_VT* to form an index into this table. */
181 #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
182 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
183
184 /* GNU extension to record C++ vtable hierarchy. */
185 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
186 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
187
188 /* GNU extension to record C++ vtable member usage. */
189 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
190 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
191 FALSE),
192
193 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
194 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
196 FALSE)
197 };
198
199 #define IS_X86_64_PCREL_TYPE(TYPE) \
200 ( ((TYPE) == R_X86_64_PC8) \
201 || ((TYPE) == R_X86_64_PC16) \
202 || ((TYPE) == R_X86_64_PC32) \
203 || ((TYPE) == R_X86_64_PC32_BND) \
204 || ((TYPE) == R_X86_64_PC64))
205
206 /* Map BFD relocs to the x86_64 elf relocs. */
207 struct elf_reloc_map
208 {
209 bfd_reloc_code_real_type bfd_reloc_val;
210 unsigned char elf_reloc_val;
211 };
212
213 static const struct elf_reloc_map x86_64_reloc_map[] =
214 {
215 { BFD_RELOC_NONE, R_X86_64_NONE, },
216 { BFD_RELOC_64, R_X86_64_64, },
217 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
218 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
219 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
220 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
221 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
222 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
223 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
224 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
225 { BFD_RELOC_32, R_X86_64_32, },
226 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
227 { BFD_RELOC_16, R_X86_64_16, },
228 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
229 { BFD_RELOC_8, R_X86_64_8, },
230 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
231 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
232 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
233 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
234 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
235 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
236 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
237 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
238 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
239 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
240 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
241 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
242 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
243 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
244 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
245 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
246 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
247 { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
248 { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
249 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
250 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
251 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
252 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
253 { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, },
254 { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, },
255 { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, },
256 { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, },
257 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
258 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
259 };
260
261 static reloc_howto_type *
262 elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
263 {
264 unsigned i;
265
266 if (r_type == (unsigned int) R_X86_64_32)
267 {
268 if (ABI_64_P (abfd))
269 i = r_type;
270 else
271 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
272 }
273 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
274 || r_type >= (unsigned int) R_X86_64_max)
275 {
276 if (r_type >= (unsigned int) R_X86_64_standard)
277 {
278 /* xgettext:c-format */
279 _bfd_error_handler (_("%B: invalid relocation type %d"),
280 abfd, (int) r_type);
281 r_type = R_X86_64_NONE;
282 }
283 i = r_type;
284 }
285 else
286 i = r_type - (unsigned int) R_X86_64_vt_offset;
287 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
288 return &x86_64_elf_howto_table[i];
289 }
290
291 /* Given a BFD reloc type, return a HOWTO structure. */
292 static reloc_howto_type *
293 elf_x86_64_reloc_type_lookup (bfd *abfd,
294 bfd_reloc_code_real_type code)
295 {
296 unsigned int i;
297
298 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
299 i++)
300 {
301 if (x86_64_reloc_map[i].bfd_reloc_val == code)
302 return elf_x86_64_rtype_to_howto (abfd,
303 x86_64_reloc_map[i].elf_reloc_val);
304 }
305 return NULL;
306 }
307
308 static reloc_howto_type *
309 elf_x86_64_reloc_name_lookup (bfd *abfd,
310 const char *r_name)
311 {
312 unsigned int i;
313
314 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
315 {
316 /* Get x32 R_X86_64_32. */
317 reloc_howto_type *reloc
318 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
319 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
320 return reloc;
321 }
322
323 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
324 if (x86_64_elf_howto_table[i].name != NULL
325 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
326 return &x86_64_elf_howto_table[i];
327
328 return NULL;
329 }
330
331 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
332
333 static void
334 elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
335 Elf_Internal_Rela *dst)
336 {
337 unsigned r_type;
338
339 r_type = ELF32_R_TYPE (dst->r_info);
340 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
341 BFD_ASSERT (r_type == cache_ptr->howto->type);
342 }
343 \f
344 /* Support for core dump NOTE sections. */
345 static bfd_boolean
346 elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
347 {
348 int offset;
349 size_t size;
350
351 switch (note->descsz)
352 {
353 default:
354 return FALSE;
355
356 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
357 /* pr_cursig */
358 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
359
360 /* pr_pid */
361 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
362
363 /* pr_reg */
364 offset = 72;
365 size = 216;
366
367 break;
368
369 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
370 /* pr_cursig */
371 elf_tdata (abfd)->core->signal
372 = bfd_get_16 (abfd, note->descdata + 12);
373
374 /* pr_pid */
375 elf_tdata (abfd)->core->lwpid
376 = bfd_get_32 (abfd, note->descdata + 32);
377
378 /* pr_reg */
379 offset = 112;
380 size = 216;
381
382 break;
383 }
384
385 /* Make a ".reg/999" section. */
386 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
387 size, note->descpos + offset);
388 }
389
390 static bfd_boolean
391 elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
392 {
393 switch (note->descsz)
394 {
395 default:
396 return FALSE;
397
398 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
399 elf_tdata (abfd)->core->pid
400 = bfd_get_32 (abfd, note->descdata + 12);
401 elf_tdata (abfd)->core->program
402 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
403 elf_tdata (abfd)->core->command
404 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
405 break;
406
407 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
408 elf_tdata (abfd)->core->pid
409 = bfd_get_32 (abfd, note->descdata + 24);
410 elf_tdata (abfd)->core->program
411 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
412 elf_tdata (abfd)->core->command
413 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
414 }
415
416 /* Note that for some reason, a spurious space is tacked
417 onto the end of the args in some (at least one anyway)
418 implementations, so strip it off if it exists. */
419
420 {
421 char *command = elf_tdata (abfd)->core->command;
422 int n = strlen (command);
423
424 if (0 < n && command[n - 1] == ' ')
425 command[n - 1] = '\0';
426 }
427
428 return TRUE;
429 }
430
431 #ifdef CORE_HEADER
432 static char *
433 elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
434 int note_type, ...)
435 {
436 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
437 va_list ap;
438 const char *fname, *psargs;
439 long pid;
440 int cursig;
441 const void *gregs;
442
443 switch (note_type)
444 {
445 default:
446 return NULL;
447
448 case NT_PRPSINFO:
449 va_start (ap, note_type);
450 fname = va_arg (ap, const char *);
451 psargs = va_arg (ap, const char *);
452 va_end (ap);
453
454 if (bed->s->elfclass == ELFCLASS32)
455 {
456 prpsinfo32_t data;
457 memset (&data, 0, sizeof (data));
458 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
459 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
460 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
461 &data, sizeof (data));
462 }
463 else
464 {
465 prpsinfo64_t data;
466 memset (&data, 0, sizeof (data));
467 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
468 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
469 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
470 &data, sizeof (data));
471 }
472 /* NOTREACHED */
473
474 case NT_PRSTATUS:
475 va_start (ap, note_type);
476 pid = va_arg (ap, long);
477 cursig = va_arg (ap, int);
478 gregs = va_arg (ap, const void *);
479 va_end (ap);
480
481 if (bed->s->elfclass == ELFCLASS32)
482 {
483 if (bed->elf_machine_code == EM_X86_64)
484 {
485 prstatusx32_t prstat;
486 memset (&prstat, 0, sizeof (prstat));
487 prstat.pr_pid = pid;
488 prstat.pr_cursig = cursig;
489 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
490 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
491 &prstat, sizeof (prstat));
492 }
493 else
494 {
495 prstatus32_t prstat;
496 memset (&prstat, 0, sizeof (prstat));
497 prstat.pr_pid = pid;
498 prstat.pr_cursig = cursig;
499 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
500 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
501 &prstat, sizeof (prstat));
502 }
503 }
504 else
505 {
506 prstatus64_t prstat;
507 memset (&prstat, 0, sizeof (prstat));
508 prstat.pr_pid = pid;
509 prstat.pr_cursig = cursig;
510 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
511 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
512 &prstat, sizeof (prstat));
513 }
514 }
515 /* NOTREACHED */
516 }
517 #endif
518 \f
519 /* Functions for the x86-64 ELF linker. */
520
521 /* The size in bytes of an entry in the global offset table. */
522
523 #define GOT_ENTRY_SIZE 8
524
525 /* The size in bytes of an entry in the lazy procedure linkage table. */
526
527 #define LAZY_PLT_ENTRY_SIZE 16
528
529 /* The size in bytes of an entry in the non-lazy procedure linkage
530 table. */
531
532 #define NON_LAZY_PLT_ENTRY_SIZE 8
533
534 /* The first entry in a lazy procedure linkage table looks like this.
535 See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this
536 works. */
537
538 static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
539 {
540 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
541 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
542 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
543 };
544
545 /* Subsequent entries in a lazy procedure linkage table look like this. */
546
547 static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
548 {
549 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
550 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
551 0x68, /* pushq immediate */
552 0, 0, 0, 0, /* replaced with index into relocation table. */
553 0xe9, /* jmp relative */
554 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
555 };
556
557 /* The first entry in a lazy procedure linkage table with BND prefix
558 like this. */
559
560 static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
561 {
562 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
563 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
564 0x0f, 0x1f, 0 /* nopl (%rax) */
565 };
566
567 /* Subsequent entries for branches with BND prefx in a lazy procedure
568 linkage table look like this. */
569
570 static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] =
571 {
572 0x68, 0, 0, 0, 0, /* pushq immediate */
573 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
574 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
575 };
576
577 /* The first entry in the IBT-enabled lazy procedure linkage table is the
578 the same as the lazy PLT with BND prefix so that bound registers are
579 preserved when control is passed to dynamic linker. Subsequent
580 entries for a IBT-enabled lazy procedure linkage table look like
581 this. */
582
583 static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
584 {
585 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
586 0x68, 0, 0, 0, 0, /* pushq immediate */
587 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
588 0x90 /* nop */
589 };
590
591 /* The first entry in the x32 IBT-enabled lazy procedure linkage table
592 is the same as the normal lazy PLT. Subsequent entries for an
593 x32 IBT-enabled lazy procedure linkage table look like this. */
594
595 static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
596 {
597 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
598 0x68, 0, 0, 0, 0, /* pushq immediate */
599 0xe9, 0, 0, 0, 0, /* jmpq relative */
600 0x66, 0x90 /* xchg %ax,%ax */
601 };
602
603 /* Entries in the non-lazey procedure linkage table look like this. */
604
605 static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
606 {
607 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
608 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
610 };
611
612 /* Entries for branches with BND prefix in the non-lazey procedure
613 linkage table look like this. */
614
615 static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
616 {
617 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
618 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
619 0x90 /* nop */
620 };
621
622 /* Entries for branches with IBT-enabled in the non-lazey procedure
623 linkage table look like this. They have the same size as the lazy
624 PLT entry. */
625
626 static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
627 {
628 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
629 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
630 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
631 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */
632 };
633
634 /* Entries for branches with IBT-enabled in the x32 non-lazey procedure
635 linkage table look like this. They have the same size as the lazy
636 PLT entry. */
637
638 static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
639 {
640 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
641 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
642 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
643 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
644 };
645
646 /* .eh_frame covering the lazy .plt section. */
647
648 static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] =
649 {
650 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
651 0, 0, 0, 0, /* CIE ID */
652 1, /* CIE version */
653 'z', 'R', 0, /* Augmentation string */
654 1, /* Code alignment factor */
655 0x78, /* Data alignment factor */
656 16, /* Return address column */
657 1, /* Augmentation size */
658 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
659 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
660 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
661 DW_CFA_nop, DW_CFA_nop,
662
663 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
664 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
665 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
666 0, 0, 0, 0, /* .plt size goes here */
667 0, /* Augmentation size */
668 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
669 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
670 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
671 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
672 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
673 11, /* Block length */
674 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
675 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
676 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
677 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
678 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
679 };
680
681 /* .eh_frame covering the lazy BND .plt section. */
682
683 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] =
684 {
685 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
686 0, 0, 0, 0, /* CIE ID */
687 1, /* CIE version */
688 'z', 'R', 0, /* Augmentation string */
689 1, /* Code alignment factor */
690 0x78, /* Data alignment factor */
691 16, /* Return address column */
692 1, /* Augmentation size */
693 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
694 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
695 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
696 DW_CFA_nop, DW_CFA_nop,
697
698 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
699 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
700 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
701 0, 0, 0, 0, /* .plt size goes here */
702 0, /* Augmentation size */
703 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
704 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
705 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
706 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
707 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
708 11, /* Block length */
709 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
710 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
711 DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge,
712 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
713 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
714 };
715
716 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
717
718 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] =
719 {
720 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
721 0, 0, 0, 0, /* CIE ID */
722 1, /* CIE version */
723 'z', 'R', 0, /* Augmentation string */
724 1, /* Code alignment factor */
725 0x78, /* Data alignment factor */
726 16, /* Return address column */
727 1, /* Augmentation size */
728 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
729 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
730 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
731 DW_CFA_nop, DW_CFA_nop,
732
733 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
734 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
735 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
736 0, 0, 0, 0, /* .plt size goes here */
737 0, /* Augmentation size */
738 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
739 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
740 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
741 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
742 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
743 11, /* Block length */
744 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
745 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
746 DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge,
747 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
748 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
749 };
750
751 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
752
753 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] =
754 {
755 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
756 0, 0, 0, 0, /* CIE ID */
757 1, /* CIE version */
758 'z', 'R', 0, /* Augmentation string */
759 1, /* Code alignment factor */
760 0x78, /* Data alignment factor */
761 16, /* Return address column */
762 1, /* Augmentation size */
763 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
764 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
765 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
766 DW_CFA_nop, DW_CFA_nop,
767
768 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
769 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
770 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
771 0, 0, 0, 0, /* .plt size goes here */
772 0, /* Augmentation size */
773 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
774 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
775 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
776 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
777 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
778 11, /* Block length */
779 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
780 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
781 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
782 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
783 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
784 };
785
786 /* .eh_frame covering the non-lazy .plt section. */
787
788 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] =
789 {
790 #define PLT_GOT_FDE_LENGTH 20
791 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
792 0, 0, 0, 0, /* CIE ID */
793 1, /* CIE version */
794 'z', 'R', 0, /* Augmentation string */
795 1, /* Code alignment factor */
796 0x78, /* Data alignment factor */
797 16, /* Return address column */
798 1, /* Augmentation size */
799 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
800 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
801 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
802 DW_CFA_nop, DW_CFA_nop,
803
804 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
805 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
806 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
807 0, 0, 0, 0, /* non-lazy .plt size goes here */
808 0, /* Augmentation size */
809 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop,
810 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
811 };
812
813 /* Architecture-specific backend data for x86-64. */
814
815 struct elf_x86_64_backend_data
816 {
817 /* Target system. */
818 enum
819 {
820 is_normal,
821 is_nacl
822 } os;
823 };
824
825 #define get_elf_x86_64_arch_data(bed) \
826 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
827
828 #define get_elf_x86_64_backend_data(abfd) \
829 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
830
831 /* These are the standard parameters. */
832 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt =
833 {
834 elf_x86_64_lazy_plt0_entry, /* plt0_entry */
835 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
836 elf_x86_64_lazy_plt_entry, /* plt_entry */
837 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
838 2, /* plt0_got1_offset */
839 8, /* plt0_got2_offset */
840 12, /* plt0_got2_insn_end */
841 2, /* plt_got_offset */
842 7, /* plt_reloc_offset */
843 12, /* plt_plt_offset */
844 6, /* plt_got_insn_size */
845 LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */
846 6, /* plt_lazy_offset */
847 elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */
848 elf_x86_64_lazy_plt_entry, /* pic_plt_entry */
849 elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */
850 sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */
851 };
852
853 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt =
854 {
855 elf_x86_64_non_lazy_plt_entry, /* plt_entry */
856 elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */
857 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
858 2, /* plt_got_offset */
859 6, /* plt_got_insn_size */
860 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
861 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
862 };
863
864 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt =
865 {
866 elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
867 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
868 elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */
869 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
870 2, /* plt0_got1_offset */
871 1+8, /* plt0_got2_offset */
872 1+12, /* plt0_got2_insn_end */
873 1+2, /* plt_got_offset */
874 1, /* plt_reloc_offset */
875 7, /* plt_plt_offset */
876 1+6, /* plt_got_insn_size */
877 11, /* plt_plt_insn_end */
878 0, /* plt_lazy_offset */
879 elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */
880 elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */
881 elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */
882 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */
883 };
884
885 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt =
886 {
887 elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */
888 elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */
889 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
890 1+2, /* plt_got_offset */
891 1+6, /* plt_got_insn_size */
892 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
893 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
894 };
895
896 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt =
897 {
898 elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
899 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
900 elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */
901 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
902 2, /* plt0_got1_offset */
903 1+8, /* plt0_got2_offset */
904 1+12, /* plt0_got2_insn_end */
905 4+1+2, /* plt_got_offset */
906 4+1, /* plt_reloc_offset */
907 4+1+6, /* plt_plt_offset */
908 4+1+6, /* plt_got_insn_size */
909 4+1+5+5, /* plt_plt_insn_end */
910 0, /* plt_lazy_offset */
911 elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */
912 elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */
913 elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
914 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
915 };
916
917 static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt =
918 {
919 elf_x86_64_lazy_plt0_entry, /* plt0_entry */
920 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
921 elf_x32_lazy_ibt_plt_entry, /* plt_entry */
922 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
923 2, /* plt0_got1_offset */
924 8, /* plt0_got2_offset */
925 12, /* plt0_got2_insn_end */
926 4+2, /* plt_got_offset */
927 4+1, /* plt_reloc_offset */
928 4+6, /* plt_plt_offset */
929 4+6, /* plt_got_insn_size */
930 4+5+5, /* plt_plt_insn_end */
931 0, /* plt_lazy_offset */
932 elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */
933 elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */
934 elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
935 sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
936 };
937
938 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt =
939 {
940 elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */
941 elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */
942 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
943 4+1+2, /* plt_got_offset */
944 4+1+6, /* plt_got_insn_size */
945 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
946 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
947 };
948
949 static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt =
950 {
951 elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */
952 elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */
953 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
954 4+2, /* plt_got_offset */
955 4+6, /* plt_got_insn_size */
956 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
957 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
958 };
959
960 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
961 {
962 is_normal /* os */
963 };
964
965 #define elf_backend_arch_data &elf_x86_64_arch_bed
966
967 static bfd_boolean
968 elf64_x86_64_elf_object_p (bfd *abfd)
969 {
970 /* Set the right machine number for an x86-64 elf64 file. */
971 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
972 return TRUE;
973 }
974
975 static bfd_boolean
976 elf32_x86_64_elf_object_p (bfd *abfd)
977 {
978 /* Set the right machine number for an x86-64 elf32 file. */
979 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
980 return TRUE;
981 }
982
983 /* Return TRUE if the TLS access code sequence support transition
984 from R_TYPE. */
985
986 static bfd_boolean
987 elf_x86_64_check_tls_transition (bfd *abfd,
988 struct bfd_link_info *info,
989 asection *sec,
990 bfd_byte *contents,
991 Elf_Internal_Shdr *symtab_hdr,
992 struct elf_link_hash_entry **sym_hashes,
993 unsigned int r_type,
994 const Elf_Internal_Rela *rel,
995 const Elf_Internal_Rela *relend)
996 {
997 unsigned int val;
998 unsigned long r_symndx;
999 bfd_boolean largepic = FALSE;
1000 struct elf_link_hash_entry *h;
1001 bfd_vma offset;
1002 struct elf_x86_link_hash_table *htab;
1003 bfd_byte *call;
1004 bfd_boolean indirect_call;
1005
1006 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
1007 offset = rel->r_offset;
1008 switch (r_type)
1009 {
1010 case R_X86_64_TLSGD:
1011 case R_X86_64_TLSLD:
1012 if ((rel + 1) >= relend)
1013 return FALSE;
1014
1015 if (r_type == R_X86_64_TLSGD)
1016 {
1017 /* Check transition from GD access model. For 64bit, only
1018 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1019 .word 0x6666; rex64; call __tls_get_addr@PLT
1020 or
1021 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1022 .byte 0x66; rex64
1023 call *__tls_get_addr@GOTPCREL(%rip)
1024 which may be converted to
1025 addr32 call __tls_get_addr
1026 can transit to different access model. For 32bit, only
1027 leaq foo@tlsgd(%rip), %rdi
1028 .word 0x6666; rex64; call __tls_get_addr@PLT
1029 or
1030 leaq foo@tlsgd(%rip), %rdi
1031 .byte 0x66; rex64
1032 call *__tls_get_addr@GOTPCREL(%rip)
1033 which may be converted to
1034 addr32 call __tls_get_addr
1035 can transit to different access model. For largepic,
1036 we also support:
1037 leaq foo@tlsgd(%rip), %rdi
1038 movabsq $__tls_get_addr@pltoff, %rax
1039 addq $r15, %rax
1040 call *%rax
1041 or
1042 leaq foo@tlsgd(%rip), %rdi
1043 movabsq $__tls_get_addr@pltoff, %rax
1044 addq $rbx, %rax
1045 call *%rax */
1046
1047 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1048
1049 if ((offset + 12) > sec->size)
1050 return FALSE;
1051
1052 call = contents + offset + 4;
1053 if (call[0] != 0x66
1054 || !((call[1] == 0x48
1055 && call[2] == 0xff
1056 && call[3] == 0x15)
1057 || (call[1] == 0x48
1058 && call[2] == 0x67
1059 && call[3] == 0xe8)
1060 || (call[1] == 0x66
1061 && call[2] == 0x48
1062 && call[3] == 0xe8)))
1063 {
1064 if (!ABI_64_P (abfd)
1065 || (offset + 19) > sec->size
1066 || offset < 3
1067 || memcmp (call - 7, leaq + 1, 3) != 0
1068 || memcmp (call, "\x48\xb8", 2) != 0
1069 || call[11] != 0x01
1070 || call[13] != 0xff
1071 || call[14] != 0xd0
1072 || !((call[10] == 0x48 && call[12] == 0xd8)
1073 || (call[10] == 0x4c && call[12] == 0xf8)))
1074 return FALSE;
1075 largepic = TRUE;
1076 }
1077 else if (ABI_64_P (abfd))
1078 {
1079 if (offset < 4
1080 || memcmp (contents + offset - 4, leaq, 4) != 0)
1081 return FALSE;
1082 }
1083 else
1084 {
1085 if (offset < 3
1086 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
1087 return FALSE;
1088 }
1089 indirect_call = call[2] == 0xff;
1090 }
1091 else
1092 {
1093 /* Check transition from LD access model. Only
1094 leaq foo@tlsld(%rip), %rdi;
1095 call __tls_get_addr@PLT
1096 or
1097 leaq foo@tlsld(%rip), %rdi;
1098 call *__tls_get_addr@GOTPCREL(%rip)
1099 which may be converted to
1100 addr32 call __tls_get_addr
1101 can transit to different access model. For largepic
1102 we also support:
1103 leaq foo@tlsld(%rip), %rdi
1104 movabsq $__tls_get_addr@pltoff, %rax
1105 addq $r15, %rax
1106 call *%rax
1107 or
1108 leaq foo@tlsld(%rip), %rdi
1109 movabsq $__tls_get_addr@pltoff, %rax
1110 addq $rbx, %rax
1111 call *%rax */
1112
1113 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
1114
1115 if (offset < 3 || (offset + 9) > sec->size)
1116 return FALSE;
1117
1118 if (memcmp (contents + offset - 3, lea, 3) != 0)
1119 return FALSE;
1120
1121 call = contents + offset + 4;
1122 if (!(call[0] == 0xe8
1123 || (call[0] == 0xff && call[1] == 0x15)
1124 || (call[0] == 0x67 && call[1] == 0xe8)))
1125 {
1126 if (!ABI_64_P (abfd)
1127 || (offset + 19) > sec->size
1128 || memcmp (call, "\x48\xb8", 2) != 0
1129 || call[11] != 0x01
1130 || call[13] != 0xff
1131 || call[14] != 0xd0
1132 || !((call[10] == 0x48 && call[12] == 0xd8)
1133 || (call[10] == 0x4c && call[12] == 0xf8)))
1134 return FALSE;
1135 largepic = TRUE;
1136 }
1137 indirect_call = call[0] == 0xff;
1138 }
1139
1140 r_symndx = htab->r_sym (rel[1].r_info);
1141 if (r_symndx < symtab_hdr->sh_info)
1142 return FALSE;
1143
1144 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1145 if (h == NULL
1146 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
1147 return FALSE;
1148 else if (largepic)
1149 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64;
1150 else if (indirect_call)
1151 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX;
1152 else
1153 return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1154 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
1155
1156 case R_X86_64_GOTTPOFF:
1157 /* Check transition from IE access model:
1158 mov foo@gottpoff(%rip), %reg
1159 add foo@gottpoff(%rip), %reg
1160 */
1161
1162 /* Check REX prefix first. */
1163 if (offset >= 3 && (offset + 4) <= sec->size)
1164 {
1165 val = bfd_get_8 (abfd, contents + offset - 3);
1166 if (val != 0x48 && val != 0x4c)
1167 {
1168 /* X32 may have 0x44 REX prefix or no REX prefix. */
1169 if (ABI_64_P (abfd))
1170 return FALSE;
1171 }
1172 }
1173 else
1174 {
1175 /* X32 may not have any REX prefix. */
1176 if (ABI_64_P (abfd))
1177 return FALSE;
1178 if (offset < 2 || (offset + 3) > sec->size)
1179 return FALSE;
1180 }
1181
1182 val = bfd_get_8 (abfd, contents + offset - 2);
1183 if (val != 0x8b && val != 0x03)
1184 return FALSE;
1185
1186 val = bfd_get_8 (abfd, contents + offset - 1);
1187 return (val & 0xc7) == 5;
1188
1189 case R_X86_64_GOTPC32_TLSDESC:
1190 /* Check transition from GDesc access model:
1191 leaq x@tlsdesc(%rip), %rax
1192
1193 Make sure it's a leaq adding rip to a 32-bit offset
1194 into any register, although it's probably almost always
1195 going to be rax. */
1196
1197 if (offset < 3 || (offset + 4) > sec->size)
1198 return FALSE;
1199
1200 val = bfd_get_8 (abfd, contents + offset - 3);
1201 if ((val & 0xfb) != 0x48)
1202 return FALSE;
1203
1204 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1205 return FALSE;
1206
1207 val = bfd_get_8 (abfd, contents + offset - 1);
1208 return (val & 0xc7) == 0x05;
1209
1210 case R_X86_64_TLSDESC_CALL:
1211 /* Check transition from GDesc access model:
1212 call *x@tlsdesc(%rax)
1213 */
1214 if (offset + 2 <= sec->size)
1215 {
1216 /* Make sure that it's a call *x@tlsdesc(%rax). */
1217 call = contents + offset;
1218 return call[0] == 0xff && call[1] == 0x10;
1219 }
1220
1221 return FALSE;
1222
1223 default:
1224 abort ();
1225 }
1226 }
1227
1228 /* Return TRUE if the TLS access transition is OK or no transition
1229 will be performed. Update R_TYPE if there is a transition. */
1230
1231 static bfd_boolean
1232 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1233 asection *sec, bfd_byte *contents,
1234 Elf_Internal_Shdr *symtab_hdr,
1235 struct elf_link_hash_entry **sym_hashes,
1236 unsigned int *r_type, int tls_type,
1237 const Elf_Internal_Rela *rel,
1238 const Elf_Internal_Rela *relend,
1239 struct elf_link_hash_entry *h,
1240 unsigned long r_symndx,
1241 bfd_boolean from_relocate_section)
1242 {
1243 unsigned int from_type = *r_type;
1244 unsigned int to_type = from_type;
1245 bfd_boolean check = TRUE;
1246
1247 /* Skip TLS transition for functions. */
1248 if (h != NULL
1249 && (h->type == STT_FUNC
1250 || h->type == STT_GNU_IFUNC))
1251 return TRUE;
1252
1253 switch (from_type)
1254 {
1255 case R_X86_64_TLSGD:
1256 case R_X86_64_GOTPC32_TLSDESC:
1257 case R_X86_64_TLSDESC_CALL:
1258 case R_X86_64_GOTTPOFF:
1259 if (bfd_link_executable (info))
1260 {
1261 if (h == NULL)
1262 to_type = R_X86_64_TPOFF32;
1263 else
1264 to_type = R_X86_64_GOTTPOFF;
1265 }
1266
1267 /* When we are called from elf_x86_64_relocate_section, there may
1268 be additional transitions based on TLS_TYPE. */
1269 if (from_relocate_section)
1270 {
1271 unsigned int new_to_type = to_type;
1272
1273 if (bfd_link_executable (info)
1274 && h != NULL
1275 && h->dynindx == -1
1276 && tls_type == GOT_TLS_IE)
1277 new_to_type = R_X86_64_TPOFF32;
1278
1279 if (to_type == R_X86_64_TLSGD
1280 || to_type == R_X86_64_GOTPC32_TLSDESC
1281 || to_type == R_X86_64_TLSDESC_CALL)
1282 {
1283 if (tls_type == GOT_TLS_IE)
1284 new_to_type = R_X86_64_GOTTPOFF;
1285 }
1286
1287 /* We checked the transition before when we were called from
1288 elf_x86_64_check_relocs. We only want to check the new
1289 transition which hasn't been checked before. */
1290 check = new_to_type != to_type && from_type == to_type;
1291 to_type = new_to_type;
1292 }
1293
1294 break;
1295
1296 case R_X86_64_TLSLD:
1297 if (bfd_link_executable (info))
1298 to_type = R_X86_64_TPOFF32;
1299 break;
1300
1301 default:
1302 return TRUE;
1303 }
1304
1305 /* Return TRUE if there is no transition. */
1306 if (from_type == to_type)
1307 return TRUE;
1308
1309 /* Check if the transition can be performed. */
1310 if (check
1311 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1312 symtab_hdr, sym_hashes,
1313 from_type, rel, relend))
1314 {
1315 reloc_howto_type *from, *to;
1316 const char *name;
1317
1318 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1319 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1320
1321 if (h)
1322 name = h->root.root.string;
1323 else
1324 {
1325 struct elf_x86_link_hash_table *htab;
1326
1327 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
1328 if (htab == NULL)
1329 name = "*unknown*";
1330 else
1331 {
1332 Elf_Internal_Sym *isym;
1333
1334 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1335 abfd, r_symndx);
1336 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1337 }
1338 }
1339
1340 _bfd_error_handler
1341 /* xgettext:c-format */
1342 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1343 "in section `%A' failed"),
1344 abfd, from->name, to->name, name, rel->r_offset, sec);
1345 bfd_set_error (bfd_error_bad_value);
1346 return FALSE;
1347 }
1348
1349 *r_type = to_type;
1350 return TRUE;
1351 }
1352
1353 /* Rename some of the generic section flags to better document how they
1354 are used here. */
1355 #define need_convert_load sec_flg0
1356 #define check_relocs_failed sec_flg1
1357
1358 static bfd_boolean
1359 elf_x86_64_need_pic (struct bfd_link_info *info,
1360 bfd *input_bfd, asection *sec,
1361 struct elf_link_hash_entry *h,
1362 Elf_Internal_Shdr *symtab_hdr,
1363 Elf_Internal_Sym *isym,
1364 reloc_howto_type *howto)
1365 {
1366 const char *v = "";
1367 const char *und = "";
1368 const char *pic = "";
1369 const char *object;
1370
1371 const char *name;
1372 if (h)
1373 {
1374 name = h->root.root.string;
1375 switch (ELF_ST_VISIBILITY (h->other))
1376 {
1377 case STV_HIDDEN:
1378 v = _("hidden symbol ");
1379 break;
1380 case STV_INTERNAL:
1381 v = _("internal symbol ");
1382 break;
1383 case STV_PROTECTED:
1384 v = _("protected symbol ");
1385 break;
1386 default:
1387 if (((struct elf_x86_link_hash_entry *) h)->def_protected)
1388 v = _("protected symbol ");
1389 else
1390 v = _("symbol ");
1391 pic = _("; recompile with -fPIC");
1392 break;
1393 }
1394
1395 if (!h->def_regular && !h->def_dynamic)
1396 und = _("undefined ");
1397 }
1398 else
1399 {
1400 name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL);
1401 pic = _("; recompile with -fPIC");
1402 }
1403
1404 if (bfd_link_dll (info))
1405 object = _("a shared object");
1406 else if (bfd_link_pie (info))
1407 object = _("a PIE object");
1408 else
1409 object = _("a PDE object");
1410
1411 /* xgettext:c-format */
1412 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1413 "not be used when making %s%s"),
1414 input_bfd, howto->name, und, v, name,
1415 object, pic);
1416 bfd_set_error (bfd_error_bad_value);
1417 sec->check_relocs_failed = 1;
1418 return FALSE;
1419 }
1420
1421 /* With the local symbol, foo, we convert
1422 mov foo@GOTPCREL(%rip), %reg
1423 to
1424 lea foo(%rip), %reg
1425 and convert
1426 call/jmp *foo@GOTPCREL(%rip)
1427 to
1428 nop call foo/jmp foo nop
1429 When PIC is false, convert
1430 test %reg, foo@GOTPCREL(%rip)
1431 to
1432 test $foo, %reg
1433 and convert
1434 binop foo@GOTPCREL(%rip), %reg
1435 to
1436 binop $foo, %reg
1437 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1438 instructions. */
1439
1440 static bfd_boolean
1441 elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec,
1442 bfd_byte *contents,
1443 Elf_Internal_Rela *irel,
1444 struct elf_link_hash_entry *h,
1445 bfd_boolean *converted,
1446 struct bfd_link_info *link_info)
1447 {
1448 struct elf_x86_link_hash_table *htab;
1449 bfd_boolean is_pic;
1450 bfd_boolean require_reloc_pc32;
1451 bfd_boolean relocx;
1452 bfd_boolean to_reloc_pc32;
1453 asection *tsec;
1454 char symtype;
1455 bfd_signed_vma raddend;
1456 unsigned int opcode;
1457 unsigned int modrm;
1458 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
1459 unsigned int r_symndx;
1460 bfd_vma toff;
1461 bfd_vma roff = irel->r_offset;
1462
1463 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
1464 return TRUE;
1465
1466 raddend = irel->r_addend;
1467 /* Addend for 32-bit PC-relative relocation must be -4. */
1468 if (raddend != -4)
1469 return TRUE;
1470
1471 htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA);
1472 is_pic = bfd_link_pic (link_info);
1473
1474 relocx = (r_type == R_X86_64_GOTPCRELX
1475 || r_type == R_X86_64_REX_GOTPCRELX);
1476
1477 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
1478 --no-relax. */
1479 require_reloc_pc32
1480 = link_info->disable_target_specific_optimizations > 1;
1481
1482 r_symndx = htab->r_sym (irel->r_info);
1483
1484 opcode = bfd_get_8 (abfd, contents + roff - 2);
1485
1486 /* Convert mov to lea since it has been done for a while. */
1487 if (opcode != 0x8b)
1488 {
1489 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
1490 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
1491 test, xor instructions. */
1492 if (!relocx)
1493 return TRUE;
1494 }
1495
1496 /* We convert only to R_X86_64_PC32:
1497 1. Branch.
1498 2. R_X86_64_GOTPCREL since we can't modify REX byte.
1499 3. require_reloc_pc32 is true.
1500 4. PIC.
1501 */
1502 to_reloc_pc32 = (opcode == 0xff
1503 || !relocx
1504 || require_reloc_pc32
1505 || is_pic);
1506
1507 /* Get the symbol referred to by the reloc. */
1508 if (h == NULL)
1509 {
1510 Elf_Internal_Sym *isym
1511 = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx);
1512
1513 /* Skip relocation against undefined symbols. */
1514 if (isym->st_shndx == SHN_UNDEF)
1515 return TRUE;
1516
1517 symtype = ELF_ST_TYPE (isym->st_info);
1518
1519 if (isym->st_shndx == SHN_ABS)
1520 tsec = bfd_abs_section_ptr;
1521 else if (isym->st_shndx == SHN_COMMON)
1522 tsec = bfd_com_section_ptr;
1523 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
1524 tsec = &_bfd_elf_large_com_section;
1525 else
1526 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1527
1528 toff = isym->st_value;
1529 }
1530 else
1531 {
1532 /* Undefined weak symbol is only bound locally in executable
1533 and its reference is resolved as 0 without relocation
1534 overflow. We can only perform this optimization for
1535 GOTPCRELX relocations since we need to modify REX byte.
1536 It is OK convert mov with R_X86_64_GOTPCREL to
1537 R_X86_64_PC32. */
1538 if ((relocx || opcode == 0x8b)
1539 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
1540 X86_64_ELF_DATA,
1541 TRUE,
1542 elf_x86_hash_entry (h)))
1543 {
1544 if (opcode == 0xff)
1545 {
1546 /* Skip for branch instructions since R_X86_64_PC32
1547 may overflow. */
1548 if (require_reloc_pc32)
1549 return TRUE;
1550 }
1551 else if (relocx)
1552 {
1553 /* For non-branch instructions, we can convert to
1554 R_X86_64_32/R_X86_64_32S since we know if there
1555 is a REX byte. */
1556 to_reloc_pc32 = FALSE;
1557 }
1558
1559 /* Since we don't know the current PC when PIC is true,
1560 we can't convert to R_X86_64_PC32. */
1561 if (to_reloc_pc32 && is_pic)
1562 return TRUE;
1563
1564 goto convert;
1565 }
1566 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
1567 ld.so may use its link-time address. */
1568 else if (h->start_stop
1569 || ((h->def_regular
1570 || h->root.type == bfd_link_hash_defined
1571 || h->root.type == bfd_link_hash_defweak)
1572 && h != htab->elf.hdynamic
1573 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
1574 {
1575 /* bfd_link_hash_new or bfd_link_hash_undefined is
1576 set by an assignment in a linker script in
1577 bfd_elf_record_link_assignment. start_stop is set
1578 on __start_SECNAME/__stop_SECNAME which mark section
1579 SECNAME. */
1580 if (h->start_stop
1581 || (h->def_regular
1582 && (h->root.type == bfd_link_hash_new
1583 || h->root.type == bfd_link_hash_undefined
1584 || ((h->root.type == bfd_link_hash_defined
1585 || h->root.type == bfd_link_hash_defweak)
1586 && h->root.u.def.section == bfd_und_section_ptr))))
1587 {
1588 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
1589 if (require_reloc_pc32)
1590 return TRUE;
1591 goto convert;
1592 }
1593 tsec = h->root.u.def.section;
1594 toff = h->root.u.def.value;
1595 symtype = h->type;
1596 }
1597 else
1598 return TRUE;
1599 }
1600
1601 /* Don't convert GOTPCREL relocation against large section. */
1602 if (elf_section_data (tsec) != NULL
1603 && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0)
1604 return TRUE;
1605
1606 /* We can only estimate relocation overflow for R_X86_64_PC32. */
1607 if (!to_reloc_pc32)
1608 goto convert;
1609
1610 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
1611 {
1612 /* At this stage in linking, no SEC_MERGE symbol has been
1613 adjusted, so all references to such symbols need to be
1614 passed through _bfd_merged_section_offset. (Later, in
1615 relocate_section, all SEC_MERGE symbols *except* for
1616 section symbols have been adjusted.)
1617
1618 gas may reduce relocations against symbols in SEC_MERGE
1619 sections to a relocation against the section symbol when
1620 the original addend was zero. When the reloc is against
1621 a section symbol we should include the addend in the
1622 offset passed to _bfd_merged_section_offset, since the
1623 location of interest is the original symbol. On the
1624 other hand, an access to "sym+addend" where "sym" is not
1625 a section symbol should not include the addend; Such an
1626 access is presumed to be an offset from "sym"; The
1627 location of interest is just "sym". */
1628 if (symtype == STT_SECTION)
1629 toff += raddend;
1630
1631 toff = _bfd_merged_section_offset (abfd, &tsec,
1632 elf_section_data (tsec)->sec_info,
1633 toff);
1634
1635 if (symtype != STT_SECTION)
1636 toff += raddend;
1637 }
1638 else
1639 toff += raddend;
1640
1641 /* Don't convert if R_X86_64_PC32 relocation overflows. */
1642 if (tsec->output_section == sec->output_section)
1643 {
1644 if ((toff - roff + 0x80000000) > 0xffffffff)
1645 return TRUE;
1646 }
1647 else
1648 {
1649 bfd_signed_vma distance;
1650
1651 /* At this point, we don't know the load addresses of TSEC
1652 section nor SEC section. We estimate the distrance between
1653 SEC and TSEC. We store the estimated distances in the
1654 compressed_size field of the output section, which is only
1655 used to decompress the compressed input section. */
1656 if (sec->output_section->compressed_size == 0)
1657 {
1658 asection *asect;
1659 bfd_size_type size = 0;
1660 for (asect = link_info->output_bfd->sections;
1661 asect != NULL;
1662 asect = asect->next)
1663 /* Skip debug sections since compressed_size is used to
1664 compress debug sections. */
1665 if ((asect->flags & SEC_DEBUGGING) == 0)
1666 {
1667 asection *i;
1668 for (i = asect->map_head.s;
1669 i != NULL;
1670 i = i->map_head.s)
1671 {
1672 size = align_power (size, i->alignment_power);
1673 size += i->size;
1674 }
1675 asect->compressed_size = size;
1676 }
1677 }
1678
1679 /* Don't convert GOTPCREL relocations if TSEC isn't placed
1680 after SEC. */
1681 distance = (tsec->output_section->compressed_size
1682 - sec->output_section->compressed_size);
1683 if (distance < 0)
1684 return TRUE;
1685
1686 /* Take PT_GNU_RELRO segment into account by adding
1687 maxpagesize. */
1688 if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize
1689 - roff + 0x80000000) > 0xffffffff)
1690 return TRUE;
1691 }
1692
1693 convert:
1694 if (opcode == 0xff)
1695 {
1696 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
1697 unsigned int nop;
1698 unsigned int disp;
1699 bfd_vma nop_offset;
1700
1701 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
1702 R_X86_64_PC32. */
1703 modrm = bfd_get_8 (abfd, contents + roff - 1);
1704 if (modrm == 0x25)
1705 {
1706 /* Convert to "jmp foo nop". */
1707 modrm = 0xe9;
1708 nop = NOP_OPCODE;
1709 nop_offset = irel->r_offset + 3;
1710 disp = bfd_get_32 (abfd, contents + irel->r_offset);
1711 irel->r_offset -= 1;
1712 bfd_put_32 (abfd, disp, contents + irel->r_offset);
1713 }
1714 else
1715 {
1716 struct elf_x86_link_hash_entry *eh
1717 = (struct elf_x86_link_hash_entry *) h;
1718
1719 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1720 is a nop prefix. */
1721 modrm = 0xe8;
1722 /* To support TLS optimization, always use addr32 prefix for
1723 "call *__tls_get_addr@GOTPCREL(%rip)". */
1724 if (eh && eh->tls_get_addr)
1725 {
1726 nop = 0x67;
1727 nop_offset = irel->r_offset - 2;
1728 }
1729 else
1730 {
1731 nop = link_info->call_nop_byte;
1732 if (link_info->call_nop_as_suffix)
1733 {
1734 nop_offset = irel->r_offset + 3;
1735 disp = bfd_get_32 (abfd, contents + irel->r_offset);
1736 irel->r_offset -= 1;
1737 bfd_put_32 (abfd, disp, contents + irel->r_offset);
1738 }
1739 else
1740 nop_offset = irel->r_offset - 2;
1741 }
1742 }
1743 bfd_put_8 (abfd, nop, contents + nop_offset);
1744 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1745 r_type = R_X86_64_PC32;
1746 }
1747 else
1748 {
1749 unsigned int rex;
1750 unsigned int rex_mask = REX_R;
1751
1752 if (r_type == R_X86_64_REX_GOTPCRELX)
1753 rex = bfd_get_8 (abfd, contents + roff - 3);
1754 else
1755 rex = 0;
1756
1757 if (opcode == 0x8b)
1758 {
1759 if (to_reloc_pc32)
1760 {
1761 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1762 "lea foo(%rip), %reg". */
1763 opcode = 0x8d;
1764 r_type = R_X86_64_PC32;
1765 }
1766 else
1767 {
1768 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1769 "mov $foo, %reg". */
1770 opcode = 0xc7;
1771 modrm = bfd_get_8 (abfd, contents + roff - 1);
1772 modrm = 0xc0 | (modrm & 0x38) >> 3;
1773 if ((rex & REX_W) != 0
1774 && ABI_64_P (link_info->output_bfd))
1775 {
1776 /* Keep the REX_W bit in REX byte for LP64. */
1777 r_type = R_X86_64_32S;
1778 goto rewrite_modrm_rex;
1779 }
1780 else
1781 {
1782 /* If the REX_W bit in REX byte isn't needed,
1783 use R_X86_64_32 and clear the W bit to avoid
1784 sign-extend imm32 to imm64. */
1785 r_type = R_X86_64_32;
1786 /* Clear the W bit in REX byte. */
1787 rex_mask |= REX_W;
1788 goto rewrite_modrm_rex;
1789 }
1790 }
1791 }
1792 else
1793 {
1794 /* R_X86_64_PC32 isn't supported. */
1795 if (to_reloc_pc32)
1796 return TRUE;
1797
1798 modrm = bfd_get_8 (abfd, contents + roff - 1);
1799 if (opcode == 0x85)
1800 {
1801 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
1802 "test $foo, %reg". */
1803 modrm = 0xc0 | (modrm & 0x38) >> 3;
1804 opcode = 0xf7;
1805 }
1806 else
1807 {
1808 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
1809 "binop $foo, %reg". */
1810 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
1811 opcode = 0x81;
1812 }
1813
1814 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
1815 overflow when sign-extending imm32 to imm64. */
1816 r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32;
1817
1818 rewrite_modrm_rex:
1819 bfd_put_8 (abfd, modrm, contents + roff - 1);
1820
1821 if (rex)
1822 {
1823 /* Move the R bit to the B bit in REX byte. */
1824 rex = (rex & ~rex_mask) | (rex & REX_R) >> 2;
1825 bfd_put_8 (abfd, rex, contents + roff - 3);
1826 }
1827
1828 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
1829 irel->r_addend = 0;
1830 }
1831
1832 bfd_put_8 (abfd, opcode, contents + roff - 2);
1833 }
1834
1835 irel->r_info = htab->r_info (r_symndx, r_type);
1836
1837 *converted = TRUE;
1838
1839 return TRUE;
1840 }
1841
1842 /* Look through the relocs for a section during the first phase, and
1843 calculate needed space in the global offset table, procedure
1844 linkage table, and dynamic reloc sections. */
1845
1846 static bfd_boolean
1847 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1848 asection *sec,
1849 const Elf_Internal_Rela *relocs)
1850 {
1851 struct elf_x86_link_hash_table *htab;
1852 Elf_Internal_Shdr *symtab_hdr;
1853 struct elf_link_hash_entry **sym_hashes;
1854 const Elf_Internal_Rela *rel;
1855 const Elf_Internal_Rela *rel_end;
1856 asection *sreloc;
1857 bfd_byte *contents;
1858
1859 if (bfd_link_relocatable (info))
1860 return TRUE;
1861
1862 /* Don't do anything special with non-loaded, non-alloced sections.
1863 In particular, any relocs in such sections should not affect GOT
1864 and PLT reference counting (ie. we don't allow them to create GOT
1865 or PLT entries), there's no possibility or desire to optimize TLS
1866 relocs, and there's not much point in propagating relocs to shared
1867 libs that the dynamic linker won't relocate. */
1868 if ((sec->flags & SEC_ALLOC) == 0)
1869 return TRUE;
1870
1871 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
1872 if (htab == NULL)
1873 {
1874 sec->check_relocs_failed = 1;
1875 return FALSE;
1876 }
1877
1878 BFD_ASSERT (is_x86_elf (abfd, htab));
1879
1880 /* Get the section contents. */
1881 if (elf_section_data (sec)->this_hdr.contents != NULL)
1882 contents = elf_section_data (sec)->this_hdr.contents;
1883 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1884 {
1885 sec->check_relocs_failed = 1;
1886 return FALSE;
1887 }
1888
1889 symtab_hdr = &elf_symtab_hdr (abfd);
1890 sym_hashes = elf_sym_hashes (abfd);
1891
1892 sreloc = NULL;
1893
1894 rel_end = relocs + sec->reloc_count;
1895 for (rel = relocs; rel < rel_end; rel++)
1896 {
1897 unsigned int r_type;
1898 unsigned int r_symndx;
1899 struct elf_link_hash_entry *h;
1900 struct elf_x86_link_hash_entry *eh;
1901 Elf_Internal_Sym *isym;
1902 const char *name;
1903 bfd_boolean size_reloc;
1904
1905 r_symndx = htab->r_sym (rel->r_info);
1906 r_type = ELF32_R_TYPE (rel->r_info);
1907
1908 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1909 {
1910 /* xgettext:c-format */
1911 _bfd_error_handler (_("%B: bad symbol index: %d"),
1912 abfd, r_symndx);
1913 goto error_return;
1914 }
1915
1916 if (r_symndx < symtab_hdr->sh_info)
1917 {
1918 /* A local symbol. */
1919 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1920 abfd, r_symndx);
1921 if (isym == NULL)
1922 goto error_return;
1923
1924 /* Check relocation against local STT_GNU_IFUNC symbol. */
1925 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1926 {
1927 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel,
1928 TRUE);
1929 if (h == NULL)
1930 goto error_return;
1931
1932 /* Fake a STT_GNU_IFUNC symbol. */
1933 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1934 isym, NULL);
1935 h->type = STT_GNU_IFUNC;
1936 h->def_regular = 1;
1937 h->ref_regular = 1;
1938 h->forced_local = 1;
1939 h->root.type = bfd_link_hash_defined;
1940 }
1941 else
1942 h = NULL;
1943 }
1944 else
1945 {
1946 isym = NULL;
1947 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1948 while (h->root.type == bfd_link_hash_indirect
1949 || h->root.type == bfd_link_hash_warning)
1950 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1951 }
1952
1953 /* Check invalid x32 relocations. */
1954 if (!ABI_64_P (abfd))
1955 switch (r_type)
1956 {
1957 default:
1958 break;
1959
1960 case R_X86_64_DTPOFF64:
1961 case R_X86_64_TPOFF64:
1962 case R_X86_64_PC64:
1963 case R_X86_64_GOTOFF64:
1964 case R_X86_64_GOT64:
1965 case R_X86_64_GOTPCREL64:
1966 case R_X86_64_GOTPC64:
1967 case R_X86_64_GOTPLT64:
1968 case R_X86_64_PLTOFF64:
1969 {
1970 if (h)
1971 name = h->root.root.string;
1972 else
1973 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1974 NULL);
1975 _bfd_error_handler
1976 /* xgettext:c-format */
1977 (_("%B: relocation %s against symbol `%s' isn't "
1978 "supported in x32 mode"), abfd,
1979 x86_64_elf_howto_table[r_type].name, name);
1980 bfd_set_error (bfd_error_bad_value);
1981 goto error_return;
1982 }
1983 break;
1984 }
1985
1986 if (h != NULL)
1987 {
1988 /* It is referenced by a non-shared object. */
1989 h->ref_regular = 1;
1990 h->root.non_ir_ref_regular = 1;
1991
1992 if (h->type == STT_GNU_IFUNC)
1993 elf_tdata (info->output_bfd)->has_gnu_symbols
1994 |= elf_gnu_symbol_ifunc;
1995 }
1996
1997 if (! elf_x86_64_tls_transition (info, abfd, sec, contents,
1998 symtab_hdr, sym_hashes,
1999 &r_type, GOT_UNKNOWN,
2000 rel, rel_end, h, r_symndx, FALSE))
2001 goto error_return;
2002
2003 eh = (struct elf_x86_link_hash_entry *) h;
2004 switch (r_type)
2005 {
2006 case R_X86_64_TLSLD:
2007 htab->tls_ld_or_ldm_got.refcount += 1;
2008 goto create_got;
2009
2010 case R_X86_64_TPOFF32:
2011 if (!bfd_link_executable (info) && ABI_64_P (abfd))
2012 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2013 &x86_64_elf_howto_table[r_type]);
2014 if (eh != NULL)
2015 eh->has_got_reloc = 1;
2016 break;
2017
2018 case R_X86_64_GOTTPOFF:
2019 if (!bfd_link_executable (info))
2020 info->flags |= DF_STATIC_TLS;
2021 /* Fall through */
2022
2023 case R_X86_64_GOT32:
2024 case R_X86_64_GOTPCREL:
2025 case R_X86_64_GOTPCRELX:
2026 case R_X86_64_REX_GOTPCRELX:
2027 case R_X86_64_TLSGD:
2028 case R_X86_64_GOT64:
2029 case R_X86_64_GOTPCREL64:
2030 case R_X86_64_GOTPLT64:
2031 case R_X86_64_GOTPC32_TLSDESC:
2032 case R_X86_64_TLSDESC_CALL:
2033 /* This symbol requires a global offset table entry. */
2034 {
2035 int tls_type, old_tls_type;
2036
2037 switch (r_type)
2038 {
2039 default: tls_type = GOT_NORMAL; break;
2040 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
2041 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
2042 case R_X86_64_GOTPC32_TLSDESC:
2043 case R_X86_64_TLSDESC_CALL:
2044 tls_type = GOT_TLS_GDESC; break;
2045 }
2046
2047 if (h != NULL)
2048 {
2049 h->got.refcount += 1;
2050 old_tls_type = eh->tls_type;
2051 }
2052 else
2053 {
2054 bfd_signed_vma *local_got_refcounts;
2055
2056 /* This is a global offset table entry for a local symbol. */
2057 local_got_refcounts = elf_local_got_refcounts (abfd);
2058 if (local_got_refcounts == NULL)
2059 {
2060 bfd_size_type size;
2061
2062 size = symtab_hdr->sh_info;
2063 size *= sizeof (bfd_signed_vma)
2064 + sizeof (bfd_vma) + sizeof (char);
2065 local_got_refcounts = ((bfd_signed_vma *)
2066 bfd_zalloc (abfd, size));
2067 if (local_got_refcounts == NULL)
2068 goto error_return;
2069 elf_local_got_refcounts (abfd) = local_got_refcounts;
2070 elf_x86_local_tlsdesc_gotent (abfd)
2071 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2072 elf_x86_local_got_tls_type (abfd)
2073 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2074 }
2075 local_got_refcounts[r_symndx] += 1;
2076 old_tls_type
2077 = elf_x86_local_got_tls_type (abfd) [r_symndx];
2078 }
2079
2080 /* If a TLS symbol is accessed using IE at least once,
2081 there is no point to use dynamic model for it. */
2082 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2083 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2084 || tls_type != GOT_TLS_IE))
2085 {
2086 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
2087 tls_type = old_tls_type;
2088 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2089 && GOT_TLS_GD_ANY_P (tls_type))
2090 tls_type |= old_tls_type;
2091 else
2092 {
2093 if (h)
2094 name = h->root.root.string;
2095 else
2096 name = bfd_elf_sym_name (abfd, symtab_hdr,
2097 isym, NULL);
2098 _bfd_error_handler
2099 /* xgettext:c-format */
2100 (_("%B: '%s' accessed both as normal and"
2101 " thread local symbol"),
2102 abfd, name);
2103 bfd_set_error (bfd_error_bad_value);
2104 goto error_return;
2105 }
2106 }
2107
2108 if (old_tls_type != tls_type)
2109 {
2110 if (eh != NULL)
2111 eh->tls_type = tls_type;
2112 else
2113 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
2114 }
2115 }
2116 /* Fall through */
2117
2118 case R_X86_64_GOTOFF64:
2119 case R_X86_64_GOTPC32:
2120 case R_X86_64_GOTPC64:
2121 create_got:
2122 if (eh != NULL)
2123 eh->has_got_reloc = 1;
2124 break;
2125
2126 case R_X86_64_PLT32:
2127 case R_X86_64_PLT32_BND:
2128 /* This symbol requires a procedure linkage table entry. We
2129 actually build the entry in adjust_dynamic_symbol,
2130 because this might be a case of linking PIC code which is
2131 never referenced by a dynamic object, in which case we
2132 don't need to generate a procedure linkage table entry
2133 after all. */
2134
2135 /* If this is a local symbol, we resolve it directly without
2136 creating a procedure linkage table entry. */
2137 if (h == NULL)
2138 continue;
2139
2140 eh->has_got_reloc = 1;
2141 h->needs_plt = 1;
2142 h->plt.refcount += 1;
2143 break;
2144
2145 case R_X86_64_PLTOFF64:
2146 /* This tries to form the 'address' of a function relative
2147 to GOT. For global symbols we need a PLT entry. */
2148 if (h != NULL)
2149 {
2150 h->needs_plt = 1;
2151 h->plt.refcount += 1;
2152 }
2153 goto create_got;
2154
2155 case R_X86_64_SIZE32:
2156 case R_X86_64_SIZE64:
2157 size_reloc = TRUE;
2158 goto do_size;
2159
2160 case R_X86_64_32:
2161 if (!ABI_64_P (abfd))
2162 goto pointer;
2163 /* Fall through. */
2164 case R_X86_64_8:
2165 case R_X86_64_16:
2166 case R_X86_64_32S:
2167 /* Check relocation overflow as these relocs may lead to
2168 run-time relocation overflow. Don't error out for
2169 sections we don't care about, such as debug sections or
2170 when relocation overflow check is disabled. */
2171 if (!info->no_reloc_overflow_check
2172 && (bfd_link_pic (info)
2173 || (bfd_link_executable (info)
2174 && h != NULL
2175 && !h->def_regular
2176 && h->def_dynamic
2177 && (sec->flags & SEC_READONLY) == 0)))
2178 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2179 &x86_64_elf_howto_table[r_type]);
2180 /* Fall through. */
2181
2182 case R_X86_64_PC8:
2183 case R_X86_64_PC16:
2184 case R_X86_64_PC32:
2185 case R_X86_64_PC32_BND:
2186 case R_X86_64_PC64:
2187 case R_X86_64_64:
2188 pointer:
2189 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2190 eh->has_non_got_reloc = 1;
2191 /* We are called after all symbols have been resolved. Only
2192 relocation against STT_GNU_IFUNC symbol must go through
2193 PLT. */
2194 if (h != NULL
2195 && (bfd_link_executable (info)
2196 || h->type == STT_GNU_IFUNC))
2197 {
2198 /* If this reloc is in a read-only section, we might
2199 need a copy reloc. We can't check reliably at this
2200 stage whether the section is read-only, as input
2201 sections have not yet been mapped to output sections.
2202 Tentatively set the flag for now, and correct in
2203 adjust_dynamic_symbol. */
2204 h->non_got_ref = 1;
2205
2206 /* We may need a .plt entry if the symbol is a function
2207 defined in a shared lib or is a STT_GNU_IFUNC function
2208 referenced from the code or read-only section. */
2209 if (!h->def_regular
2210 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2211 h->plt.refcount += 1;
2212
2213 if (r_type == R_X86_64_PC32)
2214 {
2215 /* Since something like ".long foo - ." may be used
2216 as pointer, make sure that PLT is used if foo is
2217 a function defined in a shared library. */
2218 if ((sec->flags & SEC_CODE) == 0)
2219 h->pointer_equality_needed = 1;
2220 }
2221 else if (r_type != R_X86_64_PC32_BND
2222 && r_type != R_X86_64_PC64)
2223 {
2224 h->pointer_equality_needed = 1;
2225 /* At run-time, R_X86_64_64 can be resolved for both
2226 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2227 can only be resolved for x32. */
2228 if ((sec->flags & SEC_READONLY) == 0
2229 && (r_type == R_X86_64_64
2230 || (!ABI_64_P (abfd)
2231 && (r_type == R_X86_64_32
2232 || r_type == R_X86_64_32S))))
2233 eh->func_pointer_refcount += 1;
2234 }
2235 }
2236
2237 size_reloc = FALSE;
2238 do_size:
2239 /* If we are creating a shared library, and this is a reloc
2240 against a global symbol, or a non PC relative reloc
2241 against a local symbol, then we need to copy the reloc
2242 into the shared library. However, if we are linking with
2243 -Bsymbolic, we do not need to copy a reloc against a
2244 global symbol which is defined in an object we are
2245 including in the link (i.e., DEF_REGULAR is set). At
2246 this point we have not seen all the input files, so it is
2247 possible that DEF_REGULAR is not set now but will be set
2248 later (it is never cleared). In case of a weak definition,
2249 DEF_REGULAR may be cleared later by a strong definition in
2250 a shared library. We account for that possibility below by
2251 storing information in the relocs_copied field of the hash
2252 table entry. A similar situation occurs when creating
2253 shared libraries and symbol visibility changes render the
2254 symbol local.
2255
2256 If on the other hand, we are creating an executable, we
2257 may need to keep relocations for symbols satisfied by a
2258 dynamic library if we manage to avoid copy relocs for the
2259 symbol.
2260
2261 Generate dynamic pointer relocation against STT_GNU_IFUNC
2262 symbol in the non-code section. */
2263 if ((bfd_link_pic (info)
2264 && (! IS_X86_64_PCREL_TYPE (r_type)
2265 || (h != NULL
2266 && (! (bfd_link_pie (info)
2267 || SYMBOLIC_BIND (info, h))
2268 || h->root.type == bfd_link_hash_defweak
2269 || !h->def_regular))))
2270 || (h != NULL
2271 && h->type == STT_GNU_IFUNC
2272 && r_type == htab->pointer_r_type
2273 && (sec->flags & SEC_CODE) == 0)
2274 || (ELIMINATE_COPY_RELOCS
2275 && !bfd_link_pic (info)
2276 && h != NULL
2277 && (h->root.type == bfd_link_hash_defweak
2278 || !h->def_regular)))
2279 {
2280 struct elf_dyn_relocs *p;
2281 struct elf_dyn_relocs **head;
2282
2283 /* We must copy these reloc types into the output file.
2284 Create a reloc section in dynobj and make room for
2285 this reloc. */
2286 if (sreloc == NULL)
2287 {
2288 sreloc = _bfd_elf_make_dynamic_reloc_section
2289 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2290 abfd, /*rela?*/ TRUE);
2291
2292 if (sreloc == NULL)
2293 goto error_return;
2294 }
2295
2296 /* If this is a global symbol, we count the number of
2297 relocations we need for this symbol. */
2298 if (h != NULL)
2299 head = &eh->dyn_relocs;
2300 else
2301 {
2302 /* Track dynamic relocs needed for local syms too.
2303 We really need local syms available to do this
2304 easily. Oh well. */
2305 asection *s;
2306 void **vpp;
2307
2308 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2309 abfd, r_symndx);
2310 if (isym == NULL)
2311 goto error_return;
2312
2313 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2314 if (s == NULL)
2315 s = sec;
2316
2317 /* Beware of type punned pointers vs strict aliasing
2318 rules. */
2319 vpp = &(elf_section_data (s)->local_dynrel);
2320 head = (struct elf_dyn_relocs **)vpp;
2321 }
2322
2323 p = *head;
2324 if (p == NULL || p->sec != sec)
2325 {
2326 bfd_size_type amt = sizeof *p;
2327
2328 p = ((struct elf_dyn_relocs *)
2329 bfd_alloc (htab->elf.dynobj, amt));
2330 if (p == NULL)
2331 goto error_return;
2332 p->next = *head;
2333 *head = p;
2334 p->sec = sec;
2335 p->count = 0;
2336 p->pc_count = 0;
2337 }
2338
2339 p->count += 1;
2340 /* Count size relocation as PC-relative relocation. */
2341 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
2342 p->pc_count += 1;
2343 }
2344 break;
2345
2346 /* This relocation describes the C++ object vtable hierarchy.
2347 Reconstruct it for later use during GC. */
2348 case R_X86_64_GNU_VTINHERIT:
2349 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2350 goto error_return;
2351 break;
2352
2353 /* This relocation describes which C++ vtable entries are actually
2354 used. Record for later use during GC. */
2355 case R_X86_64_GNU_VTENTRY:
2356 BFD_ASSERT (h != NULL);
2357 if (h != NULL
2358 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2359 goto error_return;
2360 break;
2361
2362 default:
2363 break;
2364 }
2365
2366 if ((r_type == R_X86_64_GOTPCREL
2367 || r_type == R_X86_64_GOTPCRELX
2368 || r_type == R_X86_64_REX_GOTPCRELX)
2369 && (h == NULL || h->type != STT_GNU_IFUNC))
2370 sec->need_convert_load = 1;
2371 }
2372
2373 if (elf_section_data (sec)->this_hdr.contents != contents)
2374 {
2375 if (!info->keep_memory)
2376 free (contents);
2377 else
2378 {
2379 /* Cache the section contents for elf_link_input_bfd. */
2380 elf_section_data (sec)->this_hdr.contents = contents;
2381 }
2382 }
2383
2384 return TRUE;
2385
2386 error_return:
2387 if (elf_section_data (sec)->this_hdr.contents != contents)
2388 free (contents);
2389 sec->check_relocs_failed = 1;
2390 return FALSE;
2391 }
2392
2393 /* Convert load via the GOT slot to load immediate. */
2394
2395 bfd_boolean
2396 _bfd_x86_64_elf_convert_load (bfd *abfd, asection *sec,
2397 struct bfd_link_info *link_info)
2398 {
2399 Elf_Internal_Shdr *symtab_hdr;
2400 Elf_Internal_Rela *internal_relocs;
2401 Elf_Internal_Rela *irel, *irelend;
2402 bfd_byte *contents;
2403 struct elf_x86_link_hash_table *htab;
2404 bfd_boolean changed;
2405 bfd_signed_vma *local_got_refcounts;
2406
2407 /* Don't even try to convert non-ELF outputs. */
2408 if (!is_elf_hash_table (link_info->hash))
2409 return FALSE;
2410
2411 /* Nothing to do if there is no need or no output. */
2412 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2413 || sec->need_convert_load == 0
2414 || bfd_is_abs_section (sec->output_section))
2415 return TRUE;
2416
2417 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2418
2419 /* Load the relocations for this section. */
2420 internal_relocs = (_bfd_elf_link_read_relocs
2421 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2422 link_info->keep_memory));
2423 if (internal_relocs == NULL)
2424 return FALSE;
2425
2426 changed = FALSE;
2427 htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA);
2428 local_got_refcounts = elf_local_got_refcounts (abfd);
2429
2430 /* Get the section contents. */
2431 if (elf_section_data (sec)->this_hdr.contents != NULL)
2432 contents = elf_section_data (sec)->this_hdr.contents;
2433 else
2434 {
2435 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2436 goto error_return;
2437 }
2438
2439 irelend = internal_relocs + sec->reloc_count;
2440 for (irel = internal_relocs; irel < irelend; irel++)
2441 {
2442 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2443 unsigned int r_symndx;
2444 struct elf_link_hash_entry *h;
2445 bfd_boolean converted;
2446
2447 if (r_type != R_X86_64_GOTPCRELX
2448 && r_type != R_X86_64_REX_GOTPCRELX
2449 && r_type != R_X86_64_GOTPCREL)
2450 continue;
2451
2452 r_symndx = htab->r_sym (irel->r_info);
2453 if (r_symndx < symtab_hdr->sh_info)
2454 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2455 (const Elf_Internal_Rela *) irel,
2456 FALSE);
2457 else
2458 {
2459 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2460 while (h->root.type == bfd_link_hash_indirect
2461 || h->root.type == bfd_link_hash_warning)
2462 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2463 }
2464
2465 /* STT_GNU_IFUNC must keep GOTPCREL relocations. */
2466 if (h != NULL && h->type == STT_GNU_IFUNC)
2467 continue;
2468
2469 converted = FALSE;
2470 if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h,
2471 &converted, link_info))
2472 goto error_return;
2473
2474 if (converted)
2475 {
2476 changed = converted;
2477 if (h)
2478 {
2479 if (h->got.refcount > 0)
2480 h->got.refcount -= 1;
2481 }
2482 else
2483 {
2484 if (local_got_refcounts != NULL
2485 && local_got_refcounts[r_symndx] > 0)
2486 local_got_refcounts[r_symndx] -= 1;
2487 }
2488 }
2489 }
2490
2491 if (contents != NULL
2492 && elf_section_data (sec)->this_hdr.contents != contents)
2493 {
2494 if (!changed && !link_info->keep_memory)
2495 free (contents);
2496 else
2497 {
2498 /* Cache the section contents for elf_link_input_bfd. */
2499 elf_section_data (sec)->this_hdr.contents = contents;
2500 }
2501 }
2502
2503 if (elf_section_data (sec)->relocs != internal_relocs)
2504 {
2505 if (!changed)
2506 free (internal_relocs);
2507 else
2508 elf_section_data (sec)->relocs = internal_relocs;
2509 }
2510
2511 return TRUE;
2512
2513 error_return:
2514 if (contents != NULL
2515 && elf_section_data (sec)->this_hdr.contents != contents)
2516 free (contents);
2517 if (internal_relocs != NULL
2518 && elf_section_data (sec)->relocs != internal_relocs)
2519 free (internal_relocs);
2520 return FALSE;
2521 }
2522
2523 /* Return the relocation value for @tpoff relocation
2524 if STT_TLS virtual address is ADDRESS. */
2525
2526 static bfd_vma
2527 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
2528 {
2529 struct elf_link_hash_table *htab = elf_hash_table (info);
2530 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2531 bfd_vma static_tls_size;
2532
2533 /* If tls_segment is NULL, we should have signalled an error already. */
2534 if (htab->tls_sec == NULL)
2535 return 0;
2536
2537 /* Consider special static TLS alignment requirements. */
2538 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2539 return address - static_tls_size - htab->tls_sec->vma;
2540 }
2541
2542 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
2543 branch? */
2544
2545 static bfd_boolean
2546 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
2547 {
2548 /* Opcode Instruction
2549 0xe8 call
2550 0xe9 jump
2551 0x0f 0x8x conditional jump */
2552 return ((offset > 0
2553 && (contents [offset - 1] == 0xe8
2554 || contents [offset - 1] == 0xe9))
2555 || (offset > 1
2556 && contents [offset - 2] == 0x0f
2557 && (contents [offset - 1] & 0xf0) == 0x80));
2558 }
2559
2560 /* Relocate an x86_64 ELF section. */
2561
2562 static bfd_boolean
2563 elf_x86_64_relocate_section (bfd *output_bfd,
2564 struct bfd_link_info *info,
2565 bfd *input_bfd,
2566 asection *input_section,
2567 bfd_byte *contents,
2568 Elf_Internal_Rela *relocs,
2569 Elf_Internal_Sym *local_syms,
2570 asection **local_sections)
2571 {
2572 struct elf_x86_link_hash_table *htab;
2573 Elf_Internal_Shdr *symtab_hdr;
2574 struct elf_link_hash_entry **sym_hashes;
2575 bfd_vma *local_got_offsets;
2576 bfd_vma *local_tlsdesc_gotents;
2577 Elf_Internal_Rela *rel;
2578 Elf_Internal_Rela *wrel;
2579 Elf_Internal_Rela *relend;
2580 unsigned int plt_entry_size;
2581
2582 /* Skip if check_relocs failed. */
2583 if (input_section->check_relocs_failed)
2584 return FALSE;
2585
2586 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
2587 if (htab == NULL)
2588 return FALSE;
2589
2590 BFD_ASSERT (is_x86_elf (input_bfd, htab));
2591
2592 plt_entry_size = htab->plt.plt_entry_size;
2593 symtab_hdr = &elf_symtab_hdr (input_bfd);
2594 sym_hashes = elf_sym_hashes (input_bfd);
2595 local_got_offsets = elf_local_got_offsets (input_bfd);
2596 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
2597
2598 _bfd_x86_elf_set_tls_module_base (info);
2599
2600 rel = wrel = relocs;
2601 relend = relocs + input_section->reloc_count;
2602 for (; rel < relend; wrel++, rel++)
2603 {
2604 unsigned int r_type;
2605 reloc_howto_type *howto;
2606 unsigned long r_symndx;
2607 struct elf_link_hash_entry *h;
2608 struct elf_x86_link_hash_entry *eh;
2609 Elf_Internal_Sym *sym;
2610 asection *sec;
2611 bfd_vma off, offplt, plt_offset;
2612 bfd_vma relocation;
2613 bfd_boolean unresolved_reloc;
2614 bfd_reloc_status_type r;
2615 int tls_type;
2616 asection *base_got, *resolved_plt;
2617 bfd_vma st_size;
2618 bfd_boolean resolved_to_zero;
2619 bfd_boolean relative_reloc;
2620
2621 r_type = ELF32_R_TYPE (rel->r_info);
2622 if (r_type == (int) R_X86_64_GNU_VTINHERIT
2623 || r_type == (int) R_X86_64_GNU_VTENTRY)
2624 {
2625 if (wrel != rel)
2626 *wrel = *rel;
2627 continue;
2628 }
2629
2630 if (r_type >= (int) R_X86_64_standard)
2631 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2632
2633 if (r_type != (int) R_X86_64_32
2634 || ABI_64_P (output_bfd))
2635 howto = x86_64_elf_howto_table + r_type;
2636 else
2637 howto = (x86_64_elf_howto_table
2638 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
2639 r_symndx = htab->r_sym (rel->r_info);
2640 h = NULL;
2641 sym = NULL;
2642 sec = NULL;
2643 unresolved_reloc = FALSE;
2644 if (r_symndx < symtab_hdr->sh_info)
2645 {
2646 sym = local_syms + r_symndx;
2647 sec = local_sections[r_symndx];
2648
2649 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
2650 &sec, rel);
2651 st_size = sym->st_size;
2652
2653 /* Relocate against local STT_GNU_IFUNC symbol. */
2654 if (!bfd_link_relocatable (info)
2655 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2656 {
2657 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd,
2658 rel, FALSE);
2659 if (h == NULL)
2660 abort ();
2661
2662 /* Set STT_GNU_IFUNC symbol value. */
2663 h->root.u.def.value = sym->st_value;
2664 h->root.u.def.section = sec;
2665 }
2666 }
2667 else
2668 {
2669 bfd_boolean warned ATTRIBUTE_UNUSED;
2670 bfd_boolean ignored ATTRIBUTE_UNUSED;
2671
2672 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2673 r_symndx, symtab_hdr, sym_hashes,
2674 h, sec, relocation,
2675 unresolved_reloc, warned, ignored);
2676 st_size = h->size;
2677 }
2678
2679 if (sec != NULL && discarded_section (sec))
2680 {
2681 _bfd_clear_contents (howto, input_bfd, input_section,
2682 contents + rel->r_offset);
2683 wrel->r_offset = rel->r_offset;
2684 wrel->r_info = 0;
2685 wrel->r_addend = 0;
2686
2687 /* For ld -r, remove relocations in debug sections against
2688 sections defined in discarded sections. Not done for
2689 eh_frame editing code expects to be present. */
2690 if (bfd_link_relocatable (info)
2691 && (input_section->flags & SEC_DEBUGGING))
2692 wrel--;
2693
2694 continue;
2695 }
2696
2697 if (bfd_link_relocatable (info))
2698 {
2699 if (wrel != rel)
2700 *wrel = *rel;
2701 continue;
2702 }
2703
2704 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
2705 {
2706 if (r_type == R_X86_64_64)
2707 {
2708 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
2709 zero-extend it to 64bit if addend is zero. */
2710 r_type = R_X86_64_32;
2711 memset (contents + rel->r_offset + 4, 0, 4);
2712 }
2713 else if (r_type == R_X86_64_SIZE64)
2714 {
2715 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
2716 zero-extend it to 64bit if addend is zero. */
2717 r_type = R_X86_64_SIZE32;
2718 memset (contents + rel->r_offset + 4, 0, 4);
2719 }
2720 }
2721
2722 eh = (struct elf_x86_link_hash_entry *) h;
2723
2724 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2725 it here if it is defined in a non-shared object. */
2726 if (h != NULL
2727 && h->type == STT_GNU_IFUNC
2728 && h->def_regular)
2729 {
2730 bfd_vma plt_index;
2731 const char *name;
2732
2733 if ((input_section->flags & SEC_ALLOC) == 0)
2734 {
2735 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2736 sections because such sections are not SEC_ALLOC and
2737 thus ld.so will not process them. */
2738 if ((input_section->flags & SEC_DEBUGGING) != 0)
2739 continue;
2740 abort ();
2741 }
2742
2743 switch (r_type)
2744 {
2745 default:
2746 break;
2747
2748 case R_X86_64_GOTPCREL:
2749 case R_X86_64_GOTPCRELX:
2750 case R_X86_64_REX_GOTPCRELX:
2751 case R_X86_64_GOTPCREL64:
2752 base_got = htab->elf.sgot;
2753 off = h->got.offset;
2754
2755 if (base_got == NULL)
2756 abort ();
2757
2758 if (off == (bfd_vma) -1)
2759 {
2760 /* We can't use h->got.offset here to save state, or
2761 even just remember the offset, as finish_dynamic_symbol
2762 would use that as offset into .got. */
2763
2764 if (h->plt.offset == (bfd_vma) -1)
2765 abort ();
2766
2767 if (htab->elf.splt != NULL)
2768 {
2769 plt_index = (h->plt.offset / plt_entry_size
2770 - htab->plt.has_plt0);
2771 off = (plt_index + 3) * GOT_ENTRY_SIZE;
2772 base_got = htab->elf.sgotplt;
2773 }
2774 else
2775 {
2776 plt_index = h->plt.offset / plt_entry_size;
2777 off = plt_index * GOT_ENTRY_SIZE;
2778 base_got = htab->elf.igotplt;
2779 }
2780
2781 if (h->dynindx == -1
2782 || h->forced_local
2783 || info->symbolic)
2784 {
2785 /* This references the local defitionion. We must
2786 initialize this entry in the global offset table.
2787 Since the offset must always be a multiple of 8,
2788 we use the least significant bit to record
2789 whether we have initialized it already.
2790
2791 When doing a dynamic link, we create a .rela.got
2792 relocation entry to initialize the value. This
2793 is done in the finish_dynamic_symbol routine. */
2794 if ((off & 1) != 0)
2795 off &= ~1;
2796 else
2797 {
2798 bfd_put_64 (output_bfd, relocation,
2799 base_got->contents + off);
2800 /* Note that this is harmless for the GOTPLT64
2801 case, as -1 | 1 still is -1. */
2802 h->got.offset |= 1;
2803 }
2804 }
2805 }
2806
2807 relocation = (base_got->output_section->vma
2808 + base_got->output_offset + off);
2809
2810 goto do_relocation;
2811 }
2812
2813 if (h->plt.offset == (bfd_vma) -1)
2814 {
2815 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2816 if (r_type == htab->pointer_r_type
2817 && (input_section->flags & SEC_CODE) == 0)
2818 goto do_ifunc_pointer;
2819 goto bad_ifunc_reloc;
2820 }
2821
2822 /* STT_GNU_IFUNC symbol must go through PLT. */
2823 if (htab->elf.splt != NULL)
2824 {
2825 if (htab->plt_second != NULL)
2826 {
2827 resolved_plt = htab->plt_second;
2828 plt_offset = eh->plt_second.offset;
2829 }
2830 else
2831 {
2832 resolved_plt = htab->elf.splt;
2833 plt_offset = h->plt.offset;
2834 }
2835 }
2836 else
2837 {
2838 resolved_plt = htab->elf.iplt;
2839 plt_offset = h->plt.offset;
2840 }
2841
2842 relocation = (resolved_plt->output_section->vma
2843 + resolved_plt->output_offset + plt_offset);
2844
2845 switch (r_type)
2846 {
2847 default:
2848 bad_ifunc_reloc:
2849 if (h->root.root.string)
2850 name = h->root.root.string;
2851 else
2852 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2853 NULL);
2854 _bfd_error_handler
2855 /* xgettext:c-format */
2856 (_("%B: relocation %s against STT_GNU_IFUNC "
2857 "symbol `%s' isn't supported"), input_bfd,
2858 howto->name, name);
2859 bfd_set_error (bfd_error_bad_value);
2860 return FALSE;
2861
2862 case R_X86_64_32S:
2863 if (bfd_link_pic (info))
2864 abort ();
2865 goto do_relocation;
2866
2867 case R_X86_64_32:
2868 if (ABI_64_P (output_bfd))
2869 goto do_relocation;
2870 /* FALLTHROUGH */
2871 case R_X86_64_64:
2872 do_ifunc_pointer:
2873 if (rel->r_addend != 0)
2874 {
2875 if (h->root.root.string)
2876 name = h->root.root.string;
2877 else
2878 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
2879 sym, NULL);
2880 _bfd_error_handler
2881 /* xgettext:c-format */
2882 (_("%B: relocation %s against STT_GNU_IFUNC "
2883 "symbol `%s' has non-zero addend: %Ld"),
2884 input_bfd, howto->name, name, rel->r_addend);
2885 bfd_set_error (bfd_error_bad_value);
2886 return FALSE;
2887 }
2888
2889 /* Generate dynamic relcoation only when there is a
2890 non-GOT reference in a shared object or there is no
2891 PLT. */
2892 if ((bfd_link_pic (info) && h->non_got_ref)
2893 || h->plt.offset == (bfd_vma) -1)
2894 {
2895 Elf_Internal_Rela outrel;
2896 asection *sreloc;
2897
2898 /* Need a dynamic relocation to get the real function
2899 address. */
2900 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2901 info,
2902 input_section,
2903 rel->r_offset);
2904 if (outrel.r_offset == (bfd_vma) -1
2905 || outrel.r_offset == (bfd_vma) -2)
2906 abort ();
2907
2908 outrel.r_offset += (input_section->output_section->vma
2909 + input_section->output_offset);
2910
2911 if (h->dynindx == -1
2912 || h->forced_local
2913 || bfd_link_executable (info))
2914 {
2915 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
2916 h->root.root.string,
2917 h->root.u.def.section->owner);
2918
2919 /* This symbol is resolved locally. */
2920 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
2921 outrel.r_addend = (h->root.u.def.value
2922 + h->root.u.def.section->output_section->vma
2923 + h->root.u.def.section->output_offset);
2924 }
2925 else
2926 {
2927 outrel.r_info = htab->r_info (h->dynindx, r_type);
2928 outrel.r_addend = 0;
2929 }
2930
2931 /* Dynamic relocations are stored in
2932 1. .rela.ifunc section in PIC object.
2933 2. .rela.got section in dynamic executable.
2934 3. .rela.iplt section in static executable. */
2935 if (bfd_link_pic (info))
2936 sreloc = htab->elf.irelifunc;
2937 else if (htab->elf.splt != NULL)
2938 sreloc = htab->elf.srelgot;
2939 else
2940 sreloc = htab->elf.irelplt;
2941 elf_append_rela (output_bfd, sreloc, &outrel);
2942
2943 /* If this reloc is against an external symbol, we
2944 do not want to fiddle with the addend. Otherwise,
2945 we need to include the symbol value so that it
2946 becomes an addend for the dynamic reloc. For an
2947 internal symbol, we have updated addend. */
2948 continue;
2949 }
2950 /* FALLTHROUGH */
2951 case R_X86_64_PC32:
2952 case R_X86_64_PC32_BND:
2953 case R_X86_64_PC64:
2954 case R_X86_64_PLT32:
2955 case R_X86_64_PLT32_BND:
2956 goto do_relocation;
2957 }
2958 }
2959
2960 resolved_to_zero = (eh != NULL
2961 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2962 X86_64_ELF_DATA,
2963 eh->has_got_reloc,
2964 eh));
2965
2966 /* When generating a shared object, the relocations handled here are
2967 copied into the output file to be resolved at run time. */
2968 switch (r_type)
2969 {
2970 case R_X86_64_GOT32:
2971 case R_X86_64_GOT64:
2972 /* Relocation is to the entry for this symbol in the global
2973 offset table. */
2974 case R_X86_64_GOTPCREL:
2975 case R_X86_64_GOTPCRELX:
2976 case R_X86_64_REX_GOTPCRELX:
2977 case R_X86_64_GOTPCREL64:
2978 /* Use global offset table entry as symbol value. */
2979 case R_X86_64_GOTPLT64:
2980 /* This is obsolete and treated the same as GOT64. */
2981 base_got = htab->elf.sgot;
2982
2983 if (htab->elf.sgot == NULL)
2984 abort ();
2985
2986 relative_reloc = FALSE;
2987 if (h != NULL)
2988 {
2989 bfd_boolean dyn;
2990
2991 off = h->got.offset;
2992 if (h->needs_plt
2993 && h->plt.offset != (bfd_vma)-1
2994 && off == (bfd_vma)-1)
2995 {
2996 /* We can't use h->got.offset here to save
2997 state, or even just remember the offset, as
2998 finish_dynamic_symbol would use that as offset into
2999 .got. */
3000 bfd_vma plt_index = (h->plt.offset / plt_entry_size
3001 - htab->plt.has_plt0);
3002 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3003 base_got = htab->elf.sgotplt;
3004 }
3005
3006 dyn = htab->elf.dynamic_sections_created;
3007
3008 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
3009 || (bfd_link_pic (info)
3010 && SYMBOL_REFERENCES_LOCAL (info, h))
3011 || (ELF_ST_VISIBILITY (h->other)
3012 && h->root.type == bfd_link_hash_undefweak))
3013 {
3014 /* This is actually a static link, or it is a -Bsymbolic
3015 link and the symbol is defined locally, or the symbol
3016 was forced to be local because of a version file. We
3017 must initialize this entry in the global offset table.
3018 Since the offset must always be a multiple of 8, we
3019 use the least significant bit to record whether we
3020 have initialized it already.
3021
3022 When doing a dynamic link, we create a .rela.got
3023 relocation entry to initialize the value. This is
3024 done in the finish_dynamic_symbol routine. */
3025 if ((off & 1) != 0)
3026 off &= ~1;
3027 else
3028 {
3029 bfd_put_64 (output_bfd, relocation,
3030 base_got->contents + off);
3031 /* Note that this is harmless for the GOTPLT64 case,
3032 as -1 | 1 still is -1. */
3033 h->got.offset |= 1;
3034
3035 if (h->dynindx == -1
3036 && !h->forced_local
3037 && h->root.type != bfd_link_hash_undefweak
3038 && bfd_link_pic (info))
3039 {
3040 /* If this symbol isn't dynamic in PIC,
3041 generate R_X86_64_RELATIVE here. */
3042 eh->no_finish_dynamic_symbol = 1;
3043 relative_reloc = TRUE;
3044 }
3045 }
3046 }
3047 else
3048 unresolved_reloc = FALSE;
3049 }
3050 else
3051 {
3052 if (local_got_offsets == NULL)
3053 abort ();
3054
3055 off = local_got_offsets[r_symndx];
3056
3057 /* The offset must always be a multiple of 8. We use
3058 the least significant bit to record whether we have
3059 already generated the necessary reloc. */
3060 if ((off & 1) != 0)
3061 off &= ~1;
3062 else
3063 {
3064 bfd_put_64 (output_bfd, relocation,
3065 base_got->contents + off);
3066 local_got_offsets[r_symndx] |= 1;
3067
3068 if (bfd_link_pic (info))
3069 relative_reloc = TRUE;
3070 }
3071 }
3072
3073 if (relative_reloc)
3074 {
3075 asection *s;
3076 Elf_Internal_Rela outrel;
3077
3078 /* We need to generate a R_X86_64_RELATIVE reloc
3079 for the dynamic linker. */
3080 s = htab->elf.srelgot;
3081 if (s == NULL)
3082 abort ();
3083
3084 outrel.r_offset = (base_got->output_section->vma
3085 + base_got->output_offset
3086 + off);
3087 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3088 outrel.r_addend = relocation;
3089 elf_append_rela (output_bfd, s, &outrel);
3090 }
3091
3092 if (off >= (bfd_vma) -2)
3093 abort ();
3094
3095 relocation = base_got->output_section->vma
3096 + base_got->output_offset + off;
3097 if (r_type != R_X86_64_GOTPCREL
3098 && r_type != R_X86_64_GOTPCRELX
3099 && r_type != R_X86_64_REX_GOTPCRELX
3100 && r_type != R_X86_64_GOTPCREL64)
3101 relocation -= htab->elf.sgotplt->output_section->vma
3102 - htab->elf.sgotplt->output_offset;
3103
3104 break;
3105
3106 case R_X86_64_GOTOFF64:
3107 /* Relocation is relative to the start of the global offset
3108 table. */
3109
3110 /* Check to make sure it isn't a protected function or data
3111 symbol for shared library since it may not be local when
3112 used as function address or with copy relocation. We also
3113 need to make sure that a symbol is referenced locally. */
3114 if (bfd_link_pic (info) && h)
3115 {
3116 if (!h->def_regular)
3117 {
3118 const char *v;
3119
3120 switch (ELF_ST_VISIBILITY (h->other))
3121 {
3122 case STV_HIDDEN:
3123 v = _("hidden symbol");
3124 break;
3125 case STV_INTERNAL:
3126 v = _("internal symbol");
3127 break;
3128 case STV_PROTECTED:
3129 v = _("protected symbol");
3130 break;
3131 default:
3132 v = _("symbol");
3133 break;
3134 }
3135
3136 _bfd_error_handler
3137 /* xgettext:c-format */
3138 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
3139 " `%s' can not be used when making a shared object"),
3140 input_bfd, v, h->root.root.string);
3141 bfd_set_error (bfd_error_bad_value);
3142 return FALSE;
3143 }
3144 else if (!bfd_link_executable (info)
3145 && !SYMBOL_REFERENCES_LOCAL (info, h)
3146 && (h->type == STT_FUNC
3147 || h->type == STT_OBJECT)
3148 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3149 {
3150 _bfd_error_handler
3151 /* xgettext:c-format */
3152 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
3153 " `%s' can not be used when making a shared object"),
3154 input_bfd,
3155 h->type == STT_FUNC ? "function" : "data",
3156 h->root.root.string);
3157 bfd_set_error (bfd_error_bad_value);
3158 return FALSE;
3159 }
3160 }
3161
3162 /* Note that sgot is not involved in this
3163 calculation. We always want the start of .got.plt. If we
3164 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3165 permitted by the ABI, we might have to change this
3166 calculation. */
3167 relocation -= htab->elf.sgotplt->output_section->vma
3168 + htab->elf.sgotplt->output_offset;
3169 break;
3170
3171 case R_X86_64_GOTPC32:
3172 case R_X86_64_GOTPC64:
3173 /* Use global offset table as symbol value. */
3174 relocation = htab->elf.sgotplt->output_section->vma
3175 + htab->elf.sgotplt->output_offset;
3176 unresolved_reloc = FALSE;
3177 break;
3178
3179 case R_X86_64_PLTOFF64:
3180 /* Relocation is PLT entry relative to GOT. For local
3181 symbols it's the symbol itself relative to GOT. */
3182 if (h != NULL
3183 /* See PLT32 handling. */
3184 && (h->plt.offset != (bfd_vma) -1
3185 || eh->plt_got.offset != (bfd_vma) -1)
3186 && htab->elf.splt != NULL)
3187 {
3188 if (eh->plt_got.offset != (bfd_vma) -1)
3189 {
3190 /* Use the GOT PLT. */
3191 resolved_plt = htab->plt_got;
3192 plt_offset = eh->plt_got.offset;
3193 }
3194 else if (htab->plt_second != NULL)
3195 {
3196 resolved_plt = htab->plt_second;
3197 plt_offset = eh->plt_second.offset;
3198 }
3199 else
3200 {
3201 resolved_plt = htab->elf.splt;
3202 plt_offset = h->plt.offset;
3203 }
3204
3205 relocation = (resolved_plt->output_section->vma
3206 + resolved_plt->output_offset
3207 + plt_offset);
3208 unresolved_reloc = FALSE;
3209 }
3210
3211 relocation -= htab->elf.sgotplt->output_section->vma
3212 + htab->elf.sgotplt->output_offset;
3213 break;
3214
3215 case R_X86_64_PLT32:
3216 case R_X86_64_PLT32_BND:
3217 /* Relocation is to the entry for this symbol in the
3218 procedure linkage table. */
3219
3220 /* Resolve a PLT32 reloc against a local symbol directly,
3221 without using the procedure linkage table. */
3222 if (h == NULL)
3223 break;
3224
3225 if ((h->plt.offset == (bfd_vma) -1
3226 && eh->plt_got.offset == (bfd_vma) -1)
3227 || htab->elf.splt == NULL)
3228 {
3229 /* We didn't make a PLT entry for this symbol. This
3230 happens when statically linking PIC code, or when
3231 using -Bsymbolic. */
3232 break;
3233 }
3234
3235 if (h->plt.offset != (bfd_vma) -1)
3236 {
3237 if (htab->plt_second != NULL)
3238 {
3239 resolved_plt = htab->plt_second;
3240 plt_offset = eh->plt_second.offset;
3241 }
3242 else
3243 {
3244 resolved_plt = htab->elf.splt;
3245 plt_offset = h->plt.offset;
3246 }
3247 }
3248 else
3249 {
3250 /* Use the GOT PLT. */
3251 resolved_plt = htab->plt_got;
3252 plt_offset = eh->plt_got.offset;
3253 }
3254
3255 relocation = (resolved_plt->output_section->vma
3256 + resolved_plt->output_offset
3257 + plt_offset);
3258 unresolved_reloc = FALSE;
3259 break;
3260
3261 case R_X86_64_SIZE32:
3262 case R_X86_64_SIZE64:
3263 /* Set to symbol size. */
3264 relocation = st_size;
3265 goto direct;
3266
3267 case R_X86_64_PC8:
3268 case R_X86_64_PC16:
3269 case R_X86_64_PC32:
3270 case R_X86_64_PC32_BND:
3271 /* Don't complain about -fPIC if the symbol is undefined when
3272 building executable unless it is unresolved weak symbol or
3273 -z nocopyreloc is used. */
3274 if ((input_section->flags & SEC_ALLOC) != 0
3275 && (input_section->flags & SEC_READONLY) != 0
3276 && h != NULL
3277 && ((bfd_link_executable (info)
3278 && ((h->root.type == bfd_link_hash_undefweak
3279 && !resolved_to_zero)
3280 || ((info->nocopyreloc
3281 || (eh->def_protected
3282 && elf_has_no_copy_on_protected (h->root.u.def.section->owner)))
3283 && h->def_dynamic
3284 && !(h->root.u.def.section->flags & SEC_CODE))))
3285 || bfd_link_dll (info)))
3286 {
3287 bfd_boolean fail = FALSE;
3288 bfd_boolean branch
3289 = ((r_type == R_X86_64_PC32
3290 || r_type == R_X86_64_PC32_BND)
3291 && is_32bit_relative_branch (contents, rel->r_offset));
3292
3293 if (SYMBOL_REFERENCES_LOCAL (info, h))
3294 {
3295 /* Symbol is referenced locally. Make sure it is
3296 defined locally or for a branch. */
3297 fail = (!(h->def_regular || ELF_COMMON_DEF_P (h))
3298 && !branch);
3299 }
3300 else if (!(bfd_link_pie (info)
3301 && (h->needs_copy || eh->needs_copy)))
3302 {
3303 /* Symbol doesn't need copy reloc and isn't referenced
3304 locally. We only allow branch to symbol with
3305 non-default visibility. */
3306 fail = (!branch
3307 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3308 }
3309
3310 if (fail)
3311 return elf_x86_64_need_pic (info, input_bfd, input_section,
3312 h, NULL, NULL, howto);
3313 }
3314 /* Fall through. */
3315
3316 case R_X86_64_8:
3317 case R_X86_64_16:
3318 case R_X86_64_32:
3319 case R_X86_64_PC64:
3320 case R_X86_64_64:
3321 /* FIXME: The ABI says the linker should make sure the value is
3322 the same when it's zeroextended to 64 bit. */
3323
3324 direct:
3325 if ((input_section->flags & SEC_ALLOC) == 0)
3326 break;
3327
3328 /* Don't copy a pc-relative relocation into the output file
3329 if the symbol needs copy reloc or the symbol is undefined
3330 when building executable. Copy dynamic function pointer
3331 relocations. Don't generate dynamic relocations against
3332 resolved undefined weak symbols in PIE. */
3333 if ((bfd_link_pic (info)
3334 && !(bfd_link_pie (info)
3335 && h != NULL
3336 && (h->needs_copy
3337 || eh->needs_copy
3338 || h->root.type == bfd_link_hash_undefined)
3339 && (IS_X86_64_PCREL_TYPE (r_type)
3340 || r_type == R_X86_64_SIZE32
3341 || r_type == R_X86_64_SIZE64))
3342 && (h == NULL
3343 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3344 && !resolved_to_zero)
3345 || h->root.type != bfd_link_hash_undefweak))
3346 && ((! IS_X86_64_PCREL_TYPE (r_type)
3347 && r_type != R_X86_64_SIZE32
3348 && r_type != R_X86_64_SIZE64)
3349 || ! SYMBOL_CALLS_LOCAL (info, h)))
3350 || (ELIMINATE_COPY_RELOCS
3351 && !bfd_link_pic (info)
3352 && h != NULL
3353 && h->dynindx != -1
3354 && (!h->non_got_ref
3355 || eh->func_pointer_refcount > 0
3356 || (h->root.type == bfd_link_hash_undefweak
3357 && !resolved_to_zero))
3358 && ((h->def_dynamic && !h->def_regular)
3359 /* Undefined weak symbol is bound locally when
3360 PIC is false. */
3361 || h->root.type == bfd_link_hash_undefined)))
3362 {
3363 Elf_Internal_Rela outrel;
3364 bfd_boolean skip, relocate;
3365 asection *sreloc;
3366
3367 /* When generating a shared object, these relocations
3368 are copied into the output file to be resolved at run
3369 time. */
3370 skip = FALSE;
3371 relocate = FALSE;
3372
3373 outrel.r_offset =
3374 _bfd_elf_section_offset (output_bfd, info, input_section,
3375 rel->r_offset);
3376 if (outrel.r_offset == (bfd_vma) -1)
3377 skip = TRUE;
3378 else if (outrel.r_offset == (bfd_vma) -2)
3379 skip = TRUE, relocate = TRUE;
3380
3381 outrel.r_offset += (input_section->output_section->vma
3382 + input_section->output_offset);
3383
3384 if (skip)
3385 memset (&outrel, 0, sizeof outrel);
3386
3387 /* h->dynindx may be -1 if this symbol was marked to
3388 become local. */
3389 else if (h != NULL
3390 && h->dynindx != -1
3391 && (IS_X86_64_PCREL_TYPE (r_type)
3392 || !(bfd_link_executable (info)
3393 || SYMBOLIC_BIND (info, h))
3394 || ! h->def_regular))
3395 {
3396 outrel.r_info = htab->r_info (h->dynindx, r_type);
3397 outrel.r_addend = rel->r_addend;
3398 }
3399 else
3400 {
3401 /* This symbol is local, or marked to become local.
3402 When relocation overflow check is disabled, we
3403 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
3404 if (r_type == htab->pointer_r_type
3405 || (r_type == R_X86_64_32
3406 && info->no_reloc_overflow_check))
3407 {
3408 relocate = TRUE;
3409 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3410 outrel.r_addend = relocation + rel->r_addend;
3411 }
3412 else if (r_type == R_X86_64_64
3413 && !ABI_64_P (output_bfd))
3414 {
3415 relocate = TRUE;
3416 outrel.r_info = htab->r_info (0,
3417 R_X86_64_RELATIVE64);
3418 outrel.r_addend = relocation + rel->r_addend;
3419 /* Check addend overflow. */
3420 if ((outrel.r_addend & 0x80000000)
3421 != (rel->r_addend & 0x80000000))
3422 {
3423 const char *name;
3424 int addend = rel->r_addend;
3425 if (h && h->root.root.string)
3426 name = h->root.root.string;
3427 else
3428 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3429 sym, NULL);
3430 _bfd_error_handler
3431 /* xgettext:c-format */
3432 (_("%B: addend %s%#x in relocation %s against "
3433 "symbol `%s' at %#Lx in section `%A' is "
3434 "out of range"),
3435 input_bfd, addend < 0 ? "-" : "", addend,
3436 howto->name, name, rel->r_offset, input_section);
3437 bfd_set_error (bfd_error_bad_value);
3438 return FALSE;
3439 }
3440 }
3441 else
3442 {
3443 long sindx;
3444
3445 if (bfd_is_abs_section (sec))
3446 sindx = 0;
3447 else if (sec == NULL || sec->owner == NULL)
3448 {
3449 bfd_set_error (bfd_error_bad_value);
3450 return FALSE;
3451 }
3452 else
3453 {
3454 asection *osec;
3455
3456 /* We are turning this relocation into one
3457 against a section symbol. It would be
3458 proper to subtract the symbol's value,
3459 osec->vma, from the emitted reloc addend,
3460 but ld.so expects buggy relocs. */
3461 osec = sec->output_section;
3462 sindx = elf_section_data (osec)->dynindx;
3463 if (sindx == 0)
3464 {
3465 asection *oi = htab->elf.text_index_section;
3466 sindx = elf_section_data (oi)->dynindx;
3467 }
3468 BFD_ASSERT (sindx != 0);
3469 }
3470
3471 outrel.r_info = htab->r_info (sindx, r_type);
3472 outrel.r_addend = relocation + rel->r_addend;
3473 }
3474 }
3475
3476 sreloc = elf_section_data (input_section)->sreloc;
3477
3478 if (sreloc == NULL || sreloc->contents == NULL)
3479 {
3480 r = bfd_reloc_notsupported;
3481 goto check_relocation_error;
3482 }
3483
3484 elf_append_rela (output_bfd, sreloc, &outrel);
3485
3486 /* If this reloc is against an external symbol, we do
3487 not want to fiddle with the addend. Otherwise, we
3488 need to include the symbol value so that it becomes
3489 an addend for the dynamic reloc. */
3490 if (! relocate)
3491 continue;
3492 }
3493
3494 break;
3495
3496 case R_X86_64_TLSGD:
3497 case R_X86_64_GOTPC32_TLSDESC:
3498 case R_X86_64_TLSDESC_CALL:
3499 case R_X86_64_GOTTPOFF:
3500 tls_type = GOT_UNKNOWN;
3501 if (h == NULL && local_got_offsets)
3502 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
3503 else if (h != NULL)
3504 tls_type = elf_x86_hash_entry (h)->tls_type;
3505
3506 if (! elf_x86_64_tls_transition (info, input_bfd,
3507 input_section, contents,
3508 symtab_hdr, sym_hashes,
3509 &r_type, tls_type, rel,
3510 relend, h, r_symndx, TRUE))
3511 return FALSE;
3512
3513 if (r_type == R_X86_64_TPOFF32)
3514 {
3515 bfd_vma roff = rel->r_offset;
3516
3517 BFD_ASSERT (! unresolved_reloc);
3518
3519 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
3520 {
3521 /* GD->LE transition. For 64bit, change
3522 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3523 .word 0x6666; rex64; call __tls_get_addr@PLT
3524 or
3525 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3526 .byte 0x66; rex64
3527 call *__tls_get_addr@GOTPCREL(%rip)
3528 which may be converted to
3529 addr32 call __tls_get_addr
3530 into:
3531 movq %fs:0, %rax
3532 leaq foo@tpoff(%rax), %rax
3533 For 32bit, change
3534 leaq foo@tlsgd(%rip), %rdi
3535 .word 0x6666; rex64; call __tls_get_addr@PLT
3536 or
3537 leaq foo@tlsgd(%rip), %rdi
3538 .byte 0x66; rex64
3539 call *__tls_get_addr@GOTPCREL(%rip)
3540 which may be converted to
3541 addr32 call __tls_get_addr
3542 into:
3543 movl %fs:0, %eax
3544 leaq foo@tpoff(%rax), %rax
3545 For largepic, change:
3546 leaq foo@tlsgd(%rip), %rdi
3547 movabsq $__tls_get_addr@pltoff, %rax
3548 addq %r15, %rax
3549 call *%rax
3550 into:
3551 movq %fs:0, %rax
3552 leaq foo@tpoff(%rax), %rax
3553 nopw 0x0(%rax,%rax,1) */
3554 int largepic = 0;
3555 if (ABI_64_P (output_bfd))
3556 {
3557 if (contents[roff + 5] == 0xb8)
3558 {
3559 memcpy (contents + roff - 3,
3560 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
3561 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3562 largepic = 1;
3563 }
3564 else
3565 memcpy (contents + roff - 4,
3566 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3567 16);
3568 }
3569 else
3570 memcpy (contents + roff - 3,
3571 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3572 15);
3573 bfd_put_32 (output_bfd,
3574 elf_x86_64_tpoff (info, relocation),
3575 contents + roff + 8 + largepic);
3576 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
3577 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
3578 rel++;
3579 wrel++;
3580 continue;
3581 }
3582 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
3583 {
3584 /* GDesc -> LE transition.
3585 It's originally something like:
3586 leaq x@tlsdesc(%rip), %rax
3587
3588 Change it to:
3589 movl $x@tpoff, %rax. */
3590
3591 unsigned int val, type;
3592
3593 type = bfd_get_8 (input_bfd, contents + roff - 3);
3594 val = bfd_get_8 (input_bfd, contents + roff - 1);
3595 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
3596 contents + roff - 3);
3597 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
3598 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3599 contents + roff - 1);
3600 bfd_put_32 (output_bfd,
3601 elf_x86_64_tpoff (info, relocation),
3602 contents + roff);
3603 continue;
3604 }
3605 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
3606 {
3607 /* GDesc -> LE transition.
3608 It's originally:
3609 call *(%rax)
3610 Turn it into:
3611 xchg %ax,%ax. */
3612 bfd_put_8 (output_bfd, 0x66, contents + roff);
3613 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3614 continue;
3615 }
3616 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
3617 {
3618 /* IE->LE transition:
3619 For 64bit, originally it can be one of:
3620 movq foo@gottpoff(%rip), %reg
3621 addq foo@gottpoff(%rip), %reg
3622 We change it into:
3623 movq $foo, %reg
3624 leaq foo(%reg), %reg
3625 addq $foo, %reg.
3626 For 32bit, originally it can be one of:
3627 movq foo@gottpoff(%rip), %reg
3628 addl foo@gottpoff(%rip), %reg
3629 We change it into:
3630 movq $foo, %reg
3631 leal foo(%reg), %reg
3632 addl $foo, %reg. */
3633
3634 unsigned int val, type, reg;
3635
3636 if (roff >= 3)
3637 val = bfd_get_8 (input_bfd, contents + roff - 3);
3638 else
3639 val = 0;
3640 type = bfd_get_8 (input_bfd, contents + roff - 2);
3641 reg = bfd_get_8 (input_bfd, contents + roff - 1);
3642 reg >>= 3;
3643 if (type == 0x8b)
3644 {
3645 /* movq */
3646 if (val == 0x4c)
3647 bfd_put_8 (output_bfd, 0x49,
3648 contents + roff - 3);
3649 else if (!ABI_64_P (output_bfd) && val == 0x44)
3650 bfd_put_8 (output_bfd, 0x41,
3651 contents + roff - 3);
3652 bfd_put_8 (output_bfd, 0xc7,
3653 contents + roff - 2);
3654 bfd_put_8 (output_bfd, 0xc0 | reg,
3655 contents + roff - 1);
3656 }
3657 else if (reg == 4)
3658 {
3659 /* addq/addl -> addq/addl - addressing with %rsp/%r12
3660 is special */
3661 if (val == 0x4c)
3662 bfd_put_8 (output_bfd, 0x49,
3663 contents + roff - 3);
3664 else if (!ABI_64_P (output_bfd) && val == 0x44)
3665 bfd_put_8 (output_bfd, 0x41,
3666 contents + roff - 3);
3667 bfd_put_8 (output_bfd, 0x81,
3668 contents + roff - 2);
3669 bfd_put_8 (output_bfd, 0xc0 | reg,
3670 contents + roff - 1);
3671 }
3672 else
3673 {
3674 /* addq/addl -> leaq/leal */
3675 if (val == 0x4c)
3676 bfd_put_8 (output_bfd, 0x4d,
3677 contents + roff - 3);
3678 else if (!ABI_64_P (output_bfd) && val == 0x44)
3679 bfd_put_8 (output_bfd, 0x45,
3680 contents + roff - 3);
3681 bfd_put_8 (output_bfd, 0x8d,
3682 contents + roff - 2);
3683 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
3684 contents + roff - 1);
3685 }
3686 bfd_put_32 (output_bfd,
3687 elf_x86_64_tpoff (info, relocation),
3688 contents + roff);
3689 continue;
3690 }
3691 else
3692 BFD_ASSERT (FALSE);
3693 }
3694
3695 if (htab->elf.sgot == NULL)
3696 abort ();
3697
3698 if (h != NULL)
3699 {
3700 off = h->got.offset;
3701 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
3702 }
3703 else
3704 {
3705 if (local_got_offsets == NULL)
3706 abort ();
3707
3708 off = local_got_offsets[r_symndx];
3709 offplt = local_tlsdesc_gotents[r_symndx];
3710 }
3711
3712 if ((off & 1) != 0)
3713 off &= ~1;
3714 else
3715 {
3716 Elf_Internal_Rela outrel;
3717 int dr_type, indx;
3718 asection *sreloc;
3719
3720 if (htab->elf.srelgot == NULL)
3721 abort ();
3722
3723 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3724
3725 if (GOT_TLS_GDESC_P (tls_type))
3726 {
3727 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
3728 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
3729 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
3730 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3731 + htab->elf.sgotplt->output_offset
3732 + offplt
3733 + htab->sgotplt_jump_table_size);
3734 sreloc = htab->elf.srelplt;
3735 if (indx == 0)
3736 outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info);
3737 else
3738 outrel.r_addend = 0;
3739 elf_append_rela (output_bfd, sreloc, &outrel);
3740 }
3741
3742 sreloc = htab->elf.srelgot;
3743
3744 outrel.r_offset = (htab->elf.sgot->output_section->vma
3745 + htab->elf.sgot->output_offset + off);
3746
3747 if (GOT_TLS_GD_P (tls_type))
3748 dr_type = R_X86_64_DTPMOD64;
3749 else if (GOT_TLS_GDESC_P (tls_type))
3750 goto dr_done;
3751 else
3752 dr_type = R_X86_64_TPOFF64;
3753
3754 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
3755 outrel.r_addend = 0;
3756 if ((dr_type == R_X86_64_TPOFF64
3757 || dr_type == R_X86_64_TLSDESC) && indx == 0)
3758 outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info);
3759 outrel.r_info = htab->r_info (indx, dr_type);
3760
3761 elf_append_rela (output_bfd, sreloc, &outrel);
3762
3763 if (GOT_TLS_GD_P (tls_type))
3764 {
3765 if (indx == 0)
3766 {
3767 BFD_ASSERT (! unresolved_reloc);
3768 bfd_put_64 (output_bfd,
3769 relocation - _bfd_x86_elf_dtpoff_base (info),
3770 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3771 }
3772 else
3773 {
3774 bfd_put_64 (output_bfd, 0,
3775 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3776 outrel.r_info = htab->r_info (indx,
3777 R_X86_64_DTPOFF64);
3778 outrel.r_offset += GOT_ENTRY_SIZE;
3779 elf_append_rela (output_bfd, sreloc,
3780 &outrel);
3781 }
3782 }
3783
3784 dr_done:
3785 if (h != NULL)
3786 h->got.offset |= 1;
3787 else
3788 local_got_offsets[r_symndx] |= 1;
3789 }
3790
3791 if (off >= (bfd_vma) -2
3792 && ! GOT_TLS_GDESC_P (tls_type))
3793 abort ();
3794 if (r_type == ELF32_R_TYPE (rel->r_info))
3795 {
3796 if (r_type == R_X86_64_GOTPC32_TLSDESC
3797 || r_type == R_X86_64_TLSDESC_CALL)
3798 relocation = htab->elf.sgotplt->output_section->vma
3799 + htab->elf.sgotplt->output_offset
3800 + offplt + htab->sgotplt_jump_table_size;
3801 else
3802 relocation = htab->elf.sgot->output_section->vma
3803 + htab->elf.sgot->output_offset + off;
3804 unresolved_reloc = FALSE;
3805 }
3806 else
3807 {
3808 bfd_vma roff = rel->r_offset;
3809
3810 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
3811 {
3812 /* GD->IE transition. For 64bit, change
3813 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3814 .word 0x6666; rex64; call __tls_get_addr@PLT
3815 or
3816 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3817 .byte 0x66; rex64
3818 call *__tls_get_addr@GOTPCREL(%rip
3819 which may be converted to
3820 addr32 call __tls_get_addr
3821 into:
3822 movq %fs:0, %rax
3823 addq foo@gottpoff(%rip), %rax
3824 For 32bit, change
3825 leaq foo@tlsgd(%rip), %rdi
3826 .word 0x6666; rex64; call __tls_get_addr@PLT
3827 or
3828 leaq foo@tlsgd(%rip), %rdi
3829 .byte 0x66; rex64;
3830 call *__tls_get_addr@GOTPCREL(%rip)
3831 which may be converted to
3832 addr32 call __tls_get_addr
3833 into:
3834 movl %fs:0, %eax
3835 addq foo@gottpoff(%rip), %rax
3836 For largepic, change:
3837 leaq foo@tlsgd(%rip), %rdi
3838 movabsq $__tls_get_addr@pltoff, %rax
3839 addq %r15, %rax
3840 call *%rax
3841 into:
3842 movq %fs:0, %rax
3843 addq foo@gottpoff(%rax), %rax
3844 nopw 0x0(%rax,%rax,1) */
3845 int largepic = 0;
3846 if (ABI_64_P (output_bfd))
3847 {
3848 if (contents[roff + 5] == 0xb8)
3849 {
3850 memcpy (contents + roff - 3,
3851 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
3852 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3853 largepic = 1;
3854 }
3855 else
3856 memcpy (contents + roff - 4,
3857 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3858 16);
3859 }
3860 else
3861 memcpy (contents + roff - 3,
3862 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3863 15);
3864
3865 relocation = (htab->elf.sgot->output_section->vma
3866 + htab->elf.sgot->output_offset + off
3867 - roff
3868 - largepic
3869 - input_section->output_section->vma
3870 - input_section->output_offset
3871 - 12);
3872 bfd_put_32 (output_bfd, relocation,
3873 contents + roff + 8 + largepic);
3874 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
3875 rel++;
3876 wrel++;
3877 continue;
3878 }
3879 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
3880 {
3881 /* GDesc -> IE transition.
3882 It's originally something like:
3883 leaq x@tlsdesc(%rip), %rax
3884
3885 Change it to:
3886 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
3887
3888 /* Now modify the instruction as appropriate. To
3889 turn a leaq into a movq in the form we use it, it
3890 suffices to change the second byte from 0x8d to
3891 0x8b. */
3892 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3893
3894 bfd_put_32 (output_bfd,
3895 htab->elf.sgot->output_section->vma
3896 + htab->elf.sgot->output_offset + off
3897 - rel->r_offset
3898 - input_section->output_section->vma
3899 - input_section->output_offset
3900 - 4,
3901 contents + roff);
3902 continue;
3903 }
3904 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
3905 {
3906 /* GDesc -> IE transition.
3907 It's originally:
3908 call *(%rax)
3909
3910 Change it to:
3911 xchg %ax, %ax. */
3912
3913 bfd_put_8 (output_bfd, 0x66, contents + roff);
3914 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3915 continue;
3916 }
3917 else
3918 BFD_ASSERT (FALSE);
3919 }
3920 break;
3921
3922 case R_X86_64_TLSLD:
3923 if (! elf_x86_64_tls_transition (info, input_bfd,
3924 input_section, contents,
3925 symtab_hdr, sym_hashes,
3926 &r_type, GOT_UNKNOWN, rel,
3927 relend, h, r_symndx, TRUE))
3928 return FALSE;
3929
3930 if (r_type != R_X86_64_TLSLD)
3931 {
3932 /* LD->LE transition:
3933 leaq foo@tlsld(%rip), %rdi
3934 call __tls_get_addr@PLT
3935 For 64bit, we change it into:
3936 .word 0x6666; .byte 0x66; movq %fs:0, %rax
3937 For 32bit, we change it into:
3938 nopl 0x0(%rax); movl %fs:0, %eax
3939 Or
3940 leaq foo@tlsld(%rip), %rdi;
3941 call *__tls_get_addr@GOTPCREL(%rip)
3942 which may be converted to
3943 addr32 call __tls_get_addr
3944 For 64bit, we change it into:
3945 .word 0x6666; .word 0x6666; movq %fs:0, %rax
3946 For 32bit, we change it into:
3947 nopw 0x0(%rax); movl %fs:0, %eax
3948 For largepic, change:
3949 leaq foo@tlsgd(%rip), %rdi
3950 movabsq $__tls_get_addr@pltoff, %rax
3951 addq %rbx, %rax
3952 call *%rax
3953 into
3954 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
3955 movq %fs:0, %eax */
3956
3957 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
3958 if (ABI_64_P (output_bfd))
3959 {
3960 if (contents[rel->r_offset + 5] == 0xb8)
3961 memcpy (contents + rel->r_offset - 3,
3962 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
3963 "\x64\x48\x8b\x04\x25\0\0\0", 22);
3964 else if (contents[rel->r_offset + 4] == 0xff
3965 || contents[rel->r_offset + 4] == 0x67)
3966 memcpy (contents + rel->r_offset - 3,
3967 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
3968 13);
3969 else
3970 memcpy (contents + rel->r_offset - 3,
3971 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3972 }
3973 else
3974 {
3975 if (contents[rel->r_offset + 4] == 0xff)
3976 memcpy (contents + rel->r_offset - 3,
3977 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
3978 13);
3979 else
3980 memcpy (contents + rel->r_offset - 3,
3981 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
3982 }
3983 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
3984 and R_X86_64_PLTOFF64. */
3985 rel++;
3986 wrel++;
3987 continue;
3988 }
3989
3990 if (htab->elf.sgot == NULL)
3991 abort ();
3992
3993 off = htab->tls_ld_or_ldm_got.offset;
3994 if (off & 1)
3995 off &= ~1;
3996 else
3997 {
3998 Elf_Internal_Rela outrel;
3999
4000 if (htab->elf.srelgot == NULL)
4001 abort ();
4002
4003 outrel.r_offset = (htab->elf.sgot->output_section->vma
4004 + htab->elf.sgot->output_offset + off);
4005
4006 bfd_put_64 (output_bfd, 0,
4007 htab->elf.sgot->contents + off);
4008 bfd_put_64 (output_bfd, 0,
4009 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4010 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
4011 outrel.r_addend = 0;
4012 elf_append_rela (output_bfd, htab->elf.srelgot,
4013 &outrel);
4014 htab->tls_ld_or_ldm_got.offset |= 1;
4015 }
4016 relocation = htab->elf.sgot->output_section->vma
4017 + htab->elf.sgot->output_offset + off;
4018 unresolved_reloc = FALSE;
4019 break;
4020
4021 case R_X86_64_DTPOFF32:
4022 if (!bfd_link_executable (info)
4023 || (input_section->flags & SEC_CODE) == 0)
4024 relocation -= _bfd_x86_elf_dtpoff_base (info);
4025 else
4026 relocation = elf_x86_64_tpoff (info, relocation);
4027 break;
4028
4029 case R_X86_64_TPOFF32:
4030 case R_X86_64_TPOFF64:
4031 BFD_ASSERT (bfd_link_executable (info));
4032 relocation = elf_x86_64_tpoff (info, relocation);
4033 break;
4034
4035 case R_X86_64_DTPOFF64:
4036 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
4037 relocation -= _bfd_x86_elf_dtpoff_base (info);
4038 break;
4039
4040 default:
4041 break;
4042 }
4043
4044 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4045 because such sections are not SEC_ALLOC and thus ld.so will
4046 not process them. */
4047 if (unresolved_reloc
4048 && !((input_section->flags & SEC_DEBUGGING) != 0
4049 && h->def_dynamic)
4050 && _bfd_elf_section_offset (output_bfd, info, input_section,
4051 rel->r_offset) != (bfd_vma) -1)
4052 {
4053 switch (r_type)
4054 {
4055 case R_X86_64_32S:
4056 sec = h->root.u.def.section;
4057 if ((info->nocopyreloc
4058 || (eh->def_protected
4059 && elf_has_no_copy_on_protected (h->root.u.def.section->owner)))
4060 && !(h->root.u.def.section->flags & SEC_CODE))
4061 return elf_x86_64_need_pic (info, input_bfd, input_section,
4062 h, NULL, NULL, howto);
4063 /* Fall through. */
4064
4065 default:
4066 _bfd_error_handler
4067 /* xgettext:c-format */
4068 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
4069 input_bfd,
4070 input_section,
4071 rel->r_offset,
4072 howto->name,
4073 h->root.root.string);
4074 return FALSE;
4075 }
4076 }
4077
4078 do_relocation:
4079 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4080 contents, rel->r_offset,
4081 relocation, rel->r_addend);
4082
4083 check_relocation_error:
4084 if (r != bfd_reloc_ok)
4085 {
4086 const char *name;
4087
4088 if (h != NULL)
4089 name = h->root.root.string;
4090 else
4091 {
4092 name = bfd_elf_string_from_elf_section (input_bfd,
4093 symtab_hdr->sh_link,
4094 sym->st_name);
4095 if (name == NULL)
4096 return FALSE;
4097 if (*name == '\0')
4098 name = bfd_section_name (input_bfd, sec);
4099 }
4100
4101 if (r == bfd_reloc_overflow)
4102 (*info->callbacks->reloc_overflow)
4103 (info, (h ? &h->root : NULL), name, howto->name,
4104 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4105 else
4106 {
4107 _bfd_error_handler
4108 /* xgettext:c-format */
4109 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
4110 input_bfd, input_section,
4111 rel->r_offset, name, (int) r);
4112 return FALSE;
4113 }
4114 }
4115
4116 if (wrel != rel)
4117 *wrel = *rel;
4118 }
4119
4120 if (wrel != rel)
4121 {
4122 Elf_Internal_Shdr *rel_hdr;
4123 size_t deleted = rel - wrel;
4124
4125 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4126 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4127 if (rel_hdr->sh_size == 0)
4128 {
4129 /* It is too late to remove an empty reloc section. Leave
4130 one NONE reloc.
4131 ??? What is wrong with an empty section??? */
4132 rel_hdr->sh_size = rel_hdr->sh_entsize;
4133 deleted -= 1;
4134 }
4135 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4136 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4137 input_section->reloc_count -= deleted;
4138 }
4139
4140 return TRUE;
4141 }
4142
4143 /* Finish up dynamic symbol handling. We set the contents of various
4144 dynamic sections here. */
4145
4146 static bfd_boolean
4147 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4148 struct bfd_link_info *info,
4149 struct elf_link_hash_entry *h,
4150 Elf_Internal_Sym *sym)
4151 {
4152 struct elf_x86_link_hash_table *htab;
4153 bfd_boolean use_plt_second;
4154 struct elf_x86_link_hash_entry *eh;
4155 bfd_boolean local_undefweak;
4156
4157 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
4158 if (htab == NULL)
4159 return FALSE;
4160
4161 /* Use the second PLT section only if there is .plt section. */
4162 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4163
4164 eh = (struct elf_x86_link_hash_entry *) h;
4165 if (eh->no_finish_dynamic_symbol)
4166 abort ();
4167
4168 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4169 resolved undefined weak symbols in executable so that their
4170 references have value 0 at run-time. */
4171 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4172 X86_64_ELF_DATA,
4173 eh->has_got_reloc,
4174 eh);
4175
4176 if (h->plt.offset != (bfd_vma) -1)
4177 {
4178 bfd_vma plt_index;
4179 bfd_vma got_offset, plt_offset;
4180 Elf_Internal_Rela rela;
4181 bfd_byte *loc;
4182 asection *plt, *gotplt, *relplt, *resolved_plt;
4183 const struct elf_backend_data *bed;
4184 bfd_vma plt_got_pcrel_offset;
4185
4186 /* When building a static executable, use .iplt, .igot.plt and
4187 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4188 if (htab->elf.splt != NULL)
4189 {
4190 plt = htab->elf.splt;
4191 gotplt = htab->elf.sgotplt;
4192 relplt = htab->elf.srelplt;
4193 }
4194 else
4195 {
4196 plt = htab->elf.iplt;
4197 gotplt = htab->elf.igotplt;
4198 relplt = htab->elf.irelplt;
4199 }
4200
4201 /* This symbol has an entry in the procedure linkage table. Set
4202 it up. */
4203 if ((h->dynindx == -1
4204 && !local_undefweak
4205 && !((h->forced_local || bfd_link_executable (info))
4206 && h->def_regular
4207 && h->type == STT_GNU_IFUNC))
4208 || plt == NULL
4209 || gotplt == NULL
4210 || relplt == NULL)
4211 abort ();
4212
4213 /* Get the index in the procedure linkage table which
4214 corresponds to this symbol. This is the index of this symbol
4215 in all the symbols for which we are making plt entries. The
4216 first entry in the procedure linkage table is reserved.
4217
4218 Get the offset into the .got table of the entry that
4219 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4220 bytes. The first three are reserved for the dynamic linker.
4221
4222 For static executables, we don't reserve anything. */
4223
4224 if (plt == htab->elf.splt)
4225 {
4226 got_offset = (h->plt.offset / htab->plt.plt_entry_size
4227 - htab->plt.has_plt0);
4228 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
4229 }
4230 else
4231 {
4232 got_offset = h->plt.offset / htab->plt.plt_entry_size;
4233 got_offset = got_offset * GOT_ENTRY_SIZE;
4234 }
4235
4236 /* Fill in the entry in the procedure linkage table. */
4237 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
4238 htab->plt.plt_entry_size);
4239 if (use_plt_second)
4240 {
4241 memcpy (htab->plt_second->contents + eh->plt_second.offset,
4242 htab->non_lazy_plt->plt_entry,
4243 htab->non_lazy_plt->plt_entry_size);
4244
4245 resolved_plt = htab->plt_second;
4246 plt_offset = eh->plt_second.offset;
4247 }
4248 else
4249 {
4250 resolved_plt = plt;
4251 plt_offset = h->plt.offset;
4252 }
4253
4254 /* Insert the relocation positions of the plt section. */
4255
4256 /* Put offset the PC-relative instruction referring to the GOT entry,
4257 subtracting the size of that instruction. */
4258 plt_got_pcrel_offset = (gotplt->output_section->vma
4259 + gotplt->output_offset
4260 + got_offset
4261 - resolved_plt->output_section->vma
4262 - resolved_plt->output_offset
4263 - plt_offset
4264 - htab->plt.plt_got_insn_size);
4265
4266 /* Check PC-relative offset overflow in PLT entry. */
4267 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
4268 /* xgettext:c-format */
4269 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
4270 output_bfd, h->root.root.string);
4271
4272 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
4273 (resolved_plt->contents + plt_offset
4274 + htab->plt.plt_got_offset));
4275
4276 /* Fill in the entry in the global offset table, initially this
4277 points to the second part of the PLT entry. Leave the entry
4278 as zero for undefined weak symbol in PIE. No PLT relocation
4279 against undefined weak symbol in PIE. */
4280 if (!local_undefweak)
4281 {
4282 if (htab->plt.has_plt0)
4283 bfd_put_64 (output_bfd, (plt->output_section->vma
4284 + plt->output_offset
4285 + h->plt.offset
4286 + htab->lazy_plt->plt_lazy_offset),
4287 gotplt->contents + got_offset);
4288
4289 /* Fill in the entry in the .rela.plt section. */
4290 rela.r_offset = (gotplt->output_section->vma
4291 + gotplt->output_offset
4292 + got_offset);
4293 if (h->dynindx == -1
4294 || ((bfd_link_executable (info)
4295 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4296 && h->def_regular
4297 && h->type == STT_GNU_IFUNC))
4298 {
4299 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4300 h->root.root.string,
4301 h->root.u.def.section->owner);
4302
4303 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4304 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4305 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4306 rela.r_addend = (h->root.u.def.value
4307 + h->root.u.def.section->output_section->vma
4308 + h->root.u.def.section->output_offset);
4309 /* R_X86_64_IRELATIVE comes last. */
4310 plt_index = htab->next_irelative_index--;
4311 }
4312 else
4313 {
4314 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
4315 rela.r_addend = 0;
4316 plt_index = htab->next_jump_slot_index++;
4317 }
4318
4319 /* Don't fill the second and third slots in PLT entry for
4320 static executables nor without PLT0. */
4321 if (plt == htab->elf.splt && htab->plt.has_plt0)
4322 {
4323 bfd_vma plt0_offset
4324 = h->plt.offset + htab->lazy_plt->plt_plt_insn_end;
4325
4326 /* Put relocation index. */
4327 bfd_put_32 (output_bfd, plt_index,
4328 (plt->contents + h->plt.offset
4329 + htab->lazy_plt->plt_reloc_offset));
4330
4331 /* Put offset for jmp .PLT0 and check for overflow. We don't
4332 check relocation index for overflow since branch displacement
4333 will overflow first. */
4334 if (plt0_offset > 0x80000000)
4335 /* xgettext:c-format */
4336 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
4337 output_bfd, h->root.root.string);
4338 bfd_put_32 (output_bfd, - plt0_offset,
4339 (plt->contents + h->plt.offset
4340 + htab->lazy_plt->plt_plt_offset));
4341 }
4342
4343 bed = get_elf_backend_data (output_bfd);
4344 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
4345 bed->s->swap_reloca_out (output_bfd, &rela, loc);
4346 }
4347 }
4348 else if (eh->plt_got.offset != (bfd_vma) -1)
4349 {
4350 bfd_vma got_offset, plt_offset;
4351 asection *plt, *got;
4352 bfd_boolean got_after_plt;
4353 int32_t got_pcrel_offset;
4354
4355 /* Set the entry in the GOT procedure linkage table. */
4356 plt = htab->plt_got;
4357 got = htab->elf.sgot;
4358 got_offset = h->got.offset;
4359
4360 if (got_offset == (bfd_vma) -1
4361 || (h->type == STT_GNU_IFUNC && h->def_regular)
4362 || plt == NULL
4363 || got == NULL)
4364 abort ();
4365
4366 /* Use the non-lazy PLT entry template for the GOT PLT since they
4367 are the identical. */
4368 /* Fill in the entry in the GOT procedure linkage table. */
4369 plt_offset = eh->plt_got.offset;
4370 memcpy (plt->contents + plt_offset,
4371 htab->non_lazy_plt->plt_entry,
4372 htab->non_lazy_plt->plt_entry_size);
4373
4374 /* Put offset the PC-relative instruction referring to the GOT
4375 entry, subtracting the size of that instruction. */
4376 got_pcrel_offset = (got->output_section->vma
4377 + got->output_offset
4378 + got_offset
4379 - plt->output_section->vma
4380 - plt->output_offset
4381 - plt_offset
4382 - htab->non_lazy_plt->plt_got_insn_size);
4383
4384 /* Check PC-relative offset overflow in GOT PLT entry. */
4385 got_after_plt = got->output_section->vma > plt->output_section->vma;
4386 if ((got_after_plt && got_pcrel_offset < 0)
4387 || (!got_after_plt && got_pcrel_offset > 0))
4388 /* xgettext:c-format */
4389 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
4390 output_bfd, h->root.root.string);
4391
4392 bfd_put_32 (output_bfd, got_pcrel_offset,
4393 (plt->contents + plt_offset
4394 + htab->non_lazy_plt->plt_got_offset));
4395 }
4396
4397 if (!local_undefweak
4398 && !h->def_regular
4399 && (h->plt.offset != (bfd_vma) -1
4400 || eh->plt_got.offset != (bfd_vma) -1))
4401 {
4402 /* Mark the symbol as undefined, rather than as defined in
4403 the .plt section. Leave the value if there were any
4404 relocations where pointer equality matters (this is a clue
4405 for the dynamic linker, to make function pointer
4406 comparisons work between an application and shared
4407 library), otherwise set it to zero. If a function is only
4408 called from a binary, there is no need to slow down
4409 shared libraries because of that. */
4410 sym->st_shndx = SHN_UNDEF;
4411 if (!h->pointer_equality_needed)
4412 sym->st_value = 0;
4413 }
4414
4415 /* Don't generate dynamic GOT relocation against undefined weak
4416 symbol in executable. */
4417 if (h->got.offset != (bfd_vma) -1
4418 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type)
4419 && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE
4420 && !local_undefweak)
4421 {
4422 Elf_Internal_Rela rela;
4423 asection *relgot = htab->elf.srelgot;
4424
4425 /* This symbol has an entry in the global offset table. Set it
4426 up. */
4427 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4428 abort ();
4429
4430 rela.r_offset = (htab->elf.sgot->output_section->vma
4431 + htab->elf.sgot->output_offset
4432 + (h->got.offset &~ (bfd_vma) 1));
4433
4434 /* If this is a static link, or it is a -Bsymbolic link and the
4435 symbol is defined locally or was forced to be local because
4436 of a version file, we just want to emit a RELATIVE reloc.
4437 The entry in the global offset table will already have been
4438 initialized in the relocate_section function. */
4439 if (h->def_regular
4440 && h->type == STT_GNU_IFUNC)
4441 {
4442 if (h->plt.offset == (bfd_vma) -1)
4443 {
4444 /* STT_GNU_IFUNC is referenced without PLT. */
4445 if (htab->elf.splt == NULL)
4446 {
4447 /* use .rel[a].iplt section to store .got relocations
4448 in static executable. */
4449 relgot = htab->elf.irelplt;
4450 }
4451 if (SYMBOL_REFERENCES_LOCAL (info, h))
4452 {
4453 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4454 output_bfd,
4455 h->root.root.string,
4456 h->root.u.def.section->owner);
4457
4458 rela.r_info = htab->r_info (0,
4459 R_X86_64_IRELATIVE);
4460 rela.r_addend = (h->root.u.def.value
4461 + h->root.u.def.section->output_section->vma
4462 + h->root.u.def.section->output_offset);
4463 }
4464 else
4465 goto do_glob_dat;
4466 }
4467 else if (bfd_link_pic (info))
4468 {
4469 /* Generate R_X86_64_GLOB_DAT. */
4470 goto do_glob_dat;
4471 }
4472 else
4473 {
4474 asection *plt;
4475 bfd_vma plt_offset;
4476
4477 if (!h->pointer_equality_needed)
4478 abort ();
4479
4480 /* For non-shared object, we can't use .got.plt, which
4481 contains the real function addres if we need pointer
4482 equality. We load the GOT entry with the PLT entry. */
4483 if (htab->plt_second != NULL)
4484 {
4485 plt = htab->plt_second;
4486 plt_offset = eh->plt_second.offset;
4487 }
4488 else
4489 {
4490 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4491 plt_offset = h->plt.offset;
4492 }
4493 bfd_put_64 (output_bfd, (plt->output_section->vma
4494 + plt->output_offset
4495 + plt_offset),
4496 htab->elf.sgot->contents + h->got.offset);
4497 return TRUE;
4498 }
4499 }
4500 else if (bfd_link_pic (info)
4501 && SYMBOL_REFERENCES_LOCAL (info, h))
4502 {
4503 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
4504 return FALSE;
4505 BFD_ASSERT((h->got.offset & 1) != 0);
4506 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4507 rela.r_addend = (h->root.u.def.value
4508 + h->root.u.def.section->output_section->vma
4509 + h->root.u.def.section->output_offset);
4510 }
4511 else
4512 {
4513 BFD_ASSERT((h->got.offset & 1) == 0);
4514 do_glob_dat:
4515 bfd_put_64 (output_bfd, (bfd_vma) 0,
4516 htab->elf.sgot->contents + h->got.offset);
4517 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
4518 rela.r_addend = 0;
4519 }
4520
4521 elf_append_rela (output_bfd, relgot, &rela);
4522 }
4523
4524 if (h->needs_copy)
4525 {
4526 Elf_Internal_Rela rela;
4527 asection *s;
4528
4529 /* This symbol needs a copy reloc. Set it up. */
4530
4531 if (h->dynindx == -1
4532 || (h->root.type != bfd_link_hash_defined
4533 && h->root.type != bfd_link_hash_defweak)
4534 || htab->elf.srelbss == NULL
4535 || htab->elf.sreldynrelro == NULL)
4536 abort ();
4537
4538 rela.r_offset = (h->root.u.def.value
4539 + h->root.u.def.section->output_section->vma
4540 + h->root.u.def.section->output_offset);
4541 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
4542 rela.r_addend = 0;
4543 if (h->root.u.def.section == htab->elf.sdynrelro)
4544 s = htab->elf.sreldynrelro;
4545 else
4546 s = htab->elf.srelbss;
4547 elf_append_rela (output_bfd, s, &rela);
4548 }
4549
4550 return TRUE;
4551 }
4552
4553 /* Finish up local dynamic symbol handling. We set the contents of
4554 various dynamic sections here. */
4555
4556 static bfd_boolean
4557 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
4558 {
4559 struct elf_link_hash_entry *h
4560 = (struct elf_link_hash_entry *) *slot;
4561 struct bfd_link_info *info
4562 = (struct bfd_link_info *) inf;
4563
4564 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
4565 info, h, NULL);
4566 }
4567
4568 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4569 here since undefined weak symbol may not be dynamic and may not be
4570 called for elf_x86_64_finish_dynamic_symbol. */
4571
4572 static bfd_boolean
4573 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
4574 void *inf)
4575 {
4576 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
4577 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4578
4579 if (h->root.type != bfd_link_hash_undefweak
4580 || h->dynindx != -1)
4581 return TRUE;
4582
4583 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
4584 info, h, NULL);
4585 }
4586
4587 /* Used to decide how to sort relocs in an optimal manner for the
4588 dynamic linker, before writing them out. */
4589
4590 static enum elf_reloc_type_class
4591 elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
4592 const asection *rel_sec ATTRIBUTE_UNUSED,
4593 const Elf_Internal_Rela *rela)
4594 {
4595 bfd *abfd = info->output_bfd;
4596 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4597 struct elf_x86_link_hash_table *htab
4598 = elf_x86_hash_table (info, X86_64_ELF_DATA);
4599
4600 if (htab->elf.dynsym != NULL
4601 && htab->elf.dynsym->contents != NULL)
4602 {
4603 /* Check relocation against STT_GNU_IFUNC symbol if there are
4604 dynamic symbols. */
4605 unsigned long r_symndx = htab->r_sym (rela->r_info);
4606 if (r_symndx != STN_UNDEF)
4607 {
4608 Elf_Internal_Sym sym;
4609 if (!bed->s->swap_symbol_in (abfd,
4610 (htab->elf.dynsym->contents
4611 + r_symndx * bed->s->sizeof_sym),
4612 0, &sym))
4613 abort ();
4614
4615 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
4616 return reloc_class_ifunc;
4617 }
4618 }
4619
4620 switch ((int) ELF32_R_TYPE (rela->r_info))
4621 {
4622 case R_X86_64_IRELATIVE:
4623 return reloc_class_ifunc;
4624 case R_X86_64_RELATIVE:
4625 case R_X86_64_RELATIVE64:
4626 return reloc_class_relative;
4627 case R_X86_64_JUMP_SLOT:
4628 return reloc_class_plt;
4629 case R_X86_64_COPY:
4630 return reloc_class_copy;
4631 default:
4632 return reloc_class_normal;
4633 }
4634 }
4635
4636 /* Finish up the dynamic sections. */
4637
4638 static bfd_boolean
4639 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
4640 struct bfd_link_info *info)
4641 {
4642 struct elf_x86_link_hash_table *htab;
4643 bfd *dynobj;
4644 asection *sdyn;
4645
4646 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
4647 if (htab == NULL)
4648 return FALSE;
4649
4650 dynobj = htab->elf.dynobj;
4651 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4652
4653 if (htab->elf.dynamic_sections_created)
4654 {
4655 bfd_byte *dyncon, *dynconend;
4656 const struct elf_backend_data *bed;
4657 bfd_size_type sizeof_dyn;
4658
4659 if (sdyn == NULL || htab->elf.sgot == NULL)
4660 abort ();
4661
4662 bed = get_elf_backend_data (dynobj);
4663 sizeof_dyn = bed->s->sizeof_dyn;
4664 dyncon = sdyn->contents;
4665 dynconend = sdyn->contents + sdyn->size;
4666 for (; dyncon < dynconend; dyncon += sizeof_dyn)
4667 {
4668 Elf_Internal_Dyn dyn;
4669 asection *s;
4670
4671 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
4672
4673 switch (dyn.d_tag)
4674 {
4675 default:
4676 continue;
4677
4678 case DT_PLTGOT:
4679 s = htab->elf.sgotplt;
4680 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4681 break;
4682
4683 case DT_JMPREL:
4684 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
4685 break;
4686
4687 case DT_PLTRELSZ:
4688 s = htab->elf.srelplt->output_section;
4689 dyn.d_un.d_val = s->size;
4690 break;
4691
4692 case DT_TLSDESC_PLT:
4693 s = htab->elf.splt;
4694 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4695 + htab->tlsdesc_plt;
4696 break;
4697
4698 case DT_TLSDESC_GOT:
4699 s = htab->elf.sgot;
4700 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4701 + htab->tlsdesc_got;
4702 break;
4703 }
4704
4705 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
4706 }
4707
4708 if (htab->elf.splt && htab->elf.splt->size > 0)
4709 {
4710 elf_section_data (htab->elf.splt->output_section)
4711 ->this_hdr.sh_entsize = htab->plt.plt_entry_size;
4712
4713 if (htab->plt.has_plt0)
4714 {
4715 /* Fill in the special first entry in the procedure linkage
4716 table. */
4717 memcpy (htab->elf.splt->contents,
4718 htab->lazy_plt->plt0_entry,
4719 htab->lazy_plt->plt0_entry_size);
4720 /* Add offset for pushq GOT+8(%rip), since the instruction
4721 uses 6 bytes subtract this value. */
4722 bfd_put_32 (output_bfd,
4723 (htab->elf.sgotplt->output_section->vma
4724 + htab->elf.sgotplt->output_offset
4725 + 8
4726 - htab->elf.splt->output_section->vma
4727 - htab->elf.splt->output_offset
4728 - 6),
4729 (htab->elf.splt->contents
4730 + htab->lazy_plt->plt0_got1_offset));
4731 /* Add offset for the PC-relative instruction accessing
4732 GOT+16, subtracting the offset to the end of that
4733 instruction. */
4734 bfd_put_32 (output_bfd,
4735 (htab->elf.sgotplt->output_section->vma
4736 + htab->elf.sgotplt->output_offset
4737 + 16
4738 - htab->elf.splt->output_section->vma
4739 - htab->elf.splt->output_offset
4740 - htab->lazy_plt->plt0_got2_insn_end),
4741 (htab->elf.splt->contents
4742 + htab->lazy_plt->plt0_got2_offset));
4743
4744 if (htab->tlsdesc_plt)
4745 {
4746 bfd_put_64 (output_bfd, (bfd_vma) 0,
4747 htab->elf.sgot->contents + htab->tlsdesc_got);
4748
4749 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
4750 htab->lazy_plt->plt0_entry,
4751 htab->lazy_plt->plt0_entry_size);
4752
4753 /* Add offset for pushq GOT+8(%rip), since the
4754 instruction uses 6 bytes subtract this value. */
4755 bfd_put_32 (output_bfd,
4756 (htab->elf.sgotplt->output_section->vma
4757 + htab->elf.sgotplt->output_offset
4758 + 8
4759 - htab->elf.splt->output_section->vma
4760 - htab->elf.splt->output_offset
4761 - htab->tlsdesc_plt
4762 - 6),
4763 (htab->elf.splt->contents
4764 + htab->tlsdesc_plt
4765 + htab->lazy_plt->plt0_got1_offset));
4766 /* Add offset for the PC-relative instruction accessing
4767 GOT+TDG, where TDG stands for htab->tlsdesc_got,
4768 subtracting the offset to the end of that
4769 instruction. */
4770 bfd_put_32 (output_bfd,
4771 (htab->elf.sgot->output_section->vma
4772 + htab->elf.sgot->output_offset
4773 + htab->tlsdesc_got
4774 - htab->elf.splt->output_section->vma
4775 - htab->elf.splt->output_offset
4776 - htab->tlsdesc_plt
4777 - htab->lazy_plt->plt0_got2_insn_end),
4778 (htab->elf.splt->contents
4779 + htab->tlsdesc_plt
4780 + htab->lazy_plt->plt0_got2_offset));
4781 }
4782 }
4783 }
4784
4785 if (htab->plt_got != NULL && htab->plt_got->size > 0)
4786 elf_section_data (htab->plt_got->output_section)
4787 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
4788
4789 if (htab->plt_second != NULL && htab->plt_second->size > 0)
4790 elf_section_data (htab->plt_second->output_section)
4791 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
4792 }
4793
4794 /* GOT is always created in setup_gnu_properties. But it may not be
4795 needed. */
4796 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
4797 {
4798 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4799 {
4800 _bfd_error_handler
4801 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4802 return FALSE;
4803 }
4804
4805 /* Set the first entry in the global offset table to the address of
4806 the dynamic section. */
4807 if (sdyn == NULL)
4808 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
4809 else
4810 bfd_put_64 (output_bfd,
4811 sdyn->output_section->vma + sdyn->output_offset,
4812 htab->elf.sgotplt->contents);
4813 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4814 bfd_put_64 (output_bfd, (bfd_vma) 0,
4815 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
4816 bfd_put_64 (output_bfd, (bfd_vma) 0,
4817 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
4818
4819 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize
4820 = GOT_ENTRY_SIZE;
4821 }
4822
4823 /* Adjust .eh_frame for .plt section. */
4824 if (htab->plt_eh_frame != NULL
4825 && htab->plt_eh_frame->contents != NULL)
4826 {
4827 if (htab->elf.splt != NULL
4828 && htab->elf.splt->size != 0
4829 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4830 && htab->elf.splt->output_section != NULL
4831 && htab->plt_eh_frame->output_section != NULL)
4832 {
4833 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4834 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4835 + htab->plt_eh_frame->output_offset
4836 + PLT_FDE_START_OFFSET;
4837 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4838 htab->plt_eh_frame->contents
4839 + PLT_FDE_START_OFFSET);
4840 }
4841 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4842 {
4843 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4844 htab->plt_eh_frame,
4845 htab->plt_eh_frame->contents))
4846 return FALSE;
4847 }
4848 }
4849
4850 /* Adjust .eh_frame for .plt.got section. */
4851 if (htab->plt_got_eh_frame != NULL
4852 && htab->plt_got_eh_frame->contents != NULL)
4853 {
4854 if (htab->plt_got != NULL
4855 && htab->plt_got->size != 0
4856 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
4857 && htab->plt_got->output_section != NULL
4858 && htab->plt_got_eh_frame->output_section != NULL)
4859 {
4860 bfd_vma plt_start = htab->plt_got->output_section->vma;
4861 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
4862 + htab->plt_got_eh_frame->output_offset
4863 + PLT_FDE_START_OFFSET;
4864 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4865 htab->plt_got_eh_frame->contents
4866 + PLT_FDE_START_OFFSET);
4867 }
4868 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4869 {
4870 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4871 htab->plt_got_eh_frame,
4872 htab->plt_got_eh_frame->contents))
4873 return FALSE;
4874 }
4875 }
4876
4877 /* Adjust .eh_frame for the second PLT section. */
4878 if (htab->plt_second_eh_frame != NULL
4879 && htab->plt_second_eh_frame->contents != NULL)
4880 {
4881 if (htab->plt_second != NULL
4882 && htab->plt_second->size != 0
4883 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
4884 && htab->plt_second->output_section != NULL
4885 && htab->plt_second_eh_frame->output_section != NULL)
4886 {
4887 bfd_vma plt_start = htab->plt_second->output_section->vma;
4888 bfd_vma eh_frame_start
4889 = (htab->plt_second_eh_frame->output_section->vma
4890 + htab->plt_second_eh_frame->output_offset
4891 + PLT_FDE_START_OFFSET);
4892 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4893 htab->plt_second_eh_frame->contents
4894 + PLT_FDE_START_OFFSET);
4895 }
4896 if (htab->plt_second_eh_frame->sec_info_type
4897 == SEC_INFO_TYPE_EH_FRAME)
4898 {
4899 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4900 htab->plt_second_eh_frame,
4901 htab->plt_second_eh_frame->contents))
4902 return FALSE;
4903 }
4904 }
4905
4906 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4907 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
4908 = GOT_ENTRY_SIZE;
4909
4910 /* Fill PLT entries for undefined weak symbols in PIE. */
4911 if (bfd_link_pie (info))
4912 bfd_hash_traverse (&info->hash->table,
4913 elf_x86_64_pie_finish_undefweak_symbol,
4914 info);
4915
4916 return TRUE;
4917 }
4918
4919 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4920 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4921 It has to be done before elf_link_sort_relocs is called so that
4922 dynamic relocations are properly sorted. */
4923
4924 static bfd_boolean
4925 elf_x86_64_output_arch_local_syms
4926 (bfd *output_bfd ATTRIBUTE_UNUSED,
4927 struct bfd_link_info *info,
4928 void *flaginfo ATTRIBUTE_UNUSED,
4929 int (*func) (void *, const char *,
4930 Elf_Internal_Sym *,
4931 asection *,
4932 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4933 {
4934 struct elf_x86_link_hash_table *htab
4935 = elf_x86_hash_table (info, X86_64_ELF_DATA);
4936 if (htab == NULL)
4937 return FALSE;
4938
4939 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4940 htab_traverse (htab->loc_hash_table,
4941 elf_x86_64_finish_local_dynamic_symbol,
4942 info);
4943
4944 return TRUE;
4945 }
4946
4947 /* Forward declaration. */
4948 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt;
4949
4950 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4951 dynamic relocations. */
4952
4953 static long
4954 elf_x86_64_get_synthetic_symtab (bfd *abfd,
4955 long symcount ATTRIBUTE_UNUSED,
4956 asymbol **syms ATTRIBUTE_UNUSED,
4957 long dynsymcount,
4958 asymbol **dynsyms,
4959 asymbol **ret)
4960 {
4961 long count, i, n;
4962 int j;
4963 bfd_byte *plt_contents;
4964 long relsize;
4965 const struct elf_x86_lazy_plt_layout *lazy_plt;
4966 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4967 const struct elf_x86_lazy_plt_layout *lazy_bnd_plt;
4968 const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt;
4969 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4970 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
4971 asection *plt;
4972 enum elf_x86_plt_type plt_type;
4973 struct elf_x86_plt plts[] =
4974 {
4975 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4976 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4977 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4978 { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 },
4979 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
4980 };
4981
4982 *ret = NULL;
4983
4984 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4985 return 0;
4986
4987 if (dynsymcount <= 0)
4988 return 0;
4989
4990 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4991 if (relsize <= 0)
4992 return -1;
4993
4994 if (get_elf_x86_64_backend_data (abfd)->os == is_normal)
4995 {
4996 lazy_plt = &elf_x86_64_lazy_plt;
4997 non_lazy_plt = &elf_x86_64_non_lazy_plt;
4998 lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt;
4999 non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt;
5000 if (ABI_64_P (abfd))
5001 {
5002 lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
5003 non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
5004 }
5005 else
5006 {
5007 lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
5008 non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
5009 }
5010 }
5011 else
5012 {
5013 lazy_plt = &elf_x86_64_nacl_plt;
5014 non_lazy_plt = NULL;
5015 lazy_bnd_plt = NULL;
5016 non_lazy_bnd_plt = NULL;
5017 lazy_ibt_plt = NULL;
5018 non_lazy_ibt_plt = NULL;
5019 }
5020
5021 count = 0;
5022 for (j = 0; plts[j].name != NULL; j++)
5023 {
5024 plt = bfd_get_section_by_name (abfd, plts[j].name);
5025 if (plt == NULL || plt->size == 0)
5026 continue;
5027
5028 /* Get the PLT section contents. */
5029 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5030 if (plt_contents == NULL)
5031 break;
5032 if (!bfd_get_section_contents (abfd, (asection *) plt,
5033 plt_contents, 0, plt->size))
5034 {
5035 free (plt_contents);
5036 break;
5037 }
5038
5039 /* Check what kind of PLT it is. */
5040 plt_type = plt_unknown;
5041 if (plts[j].type == plt_unknown
5042 && (plt->size >= (lazy_plt->plt_entry_size
5043 + lazy_plt->plt_entry_size)))
5044 {
5045 /* Match lazy PLT first. Need to check the first two
5046 instructions. */
5047 if ((memcmp (plt_contents, lazy_plt->plt0_entry,
5048 lazy_plt->plt0_got1_offset) == 0)
5049 && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6,
5050 2) == 0))
5051 plt_type = plt_lazy;
5052 else if (lazy_bnd_plt != NULL
5053 && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry,
5054 lazy_bnd_plt->plt0_got1_offset) == 0)
5055 && (memcmp (plt_contents + 6,
5056 lazy_bnd_plt->plt0_entry + 6, 3) == 0))
5057 {
5058 plt_type = plt_lazy | plt_second;
5059 /* The fist entry in the lazy IBT PLT is the same as the
5060 lazy BND PLT. */
5061 if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size,
5062 lazy_ibt_plt->plt_entry,
5063 lazy_ibt_plt->plt_got_offset) == 0))
5064 lazy_plt = lazy_ibt_plt;
5065 else
5066 lazy_plt = lazy_bnd_plt;
5067 }
5068 }
5069
5070 if (non_lazy_plt != NULL
5071 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5072 && plt->size >= non_lazy_plt->plt_entry_size)
5073 {
5074 /* Match non-lazy PLT. */
5075 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5076 non_lazy_plt->plt_got_offset) == 0)
5077 plt_type = plt_non_lazy;
5078 }
5079
5080 if (plt_type == plt_unknown || plt_type == plt_second)
5081 {
5082 if (non_lazy_bnd_plt != NULL
5083 && plt->size >= non_lazy_bnd_plt->plt_entry_size
5084 && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry,
5085 non_lazy_bnd_plt->plt_got_offset) == 0))
5086 {
5087 /* Match BND PLT. */
5088 plt_type = plt_second;
5089 non_lazy_plt = non_lazy_bnd_plt;
5090 }
5091 else if (non_lazy_ibt_plt != NULL
5092 && plt->size >= non_lazy_ibt_plt->plt_entry_size
5093 && (memcmp (plt_contents,
5094 non_lazy_ibt_plt->plt_entry,
5095 non_lazy_ibt_plt->plt_got_offset) == 0))
5096 {
5097 /* Match IBT PLT. */
5098 plt_type = plt_second;
5099 non_lazy_plt = non_lazy_ibt_plt;
5100 }
5101 }
5102
5103 if (plt_type == plt_unknown)
5104 {
5105 free (plt_contents);
5106 continue;
5107 }
5108
5109 plts[j].sec = plt;
5110 plts[j].type = plt_type;
5111
5112 if ((plt_type & plt_lazy))
5113 {
5114 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5115 plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size;
5116 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5117 /* Skip PLT0 in lazy PLT. */
5118 i = 1;
5119 }
5120 else
5121 {
5122 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5123 plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size;
5124 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5125 i = 0;
5126 }
5127
5128 /* Skip lazy PLT when the second PLT is used. */
5129 if (plt_type == (plt_lazy | plt_second))
5130 plts[j].count = 0;
5131 else
5132 {
5133 n = plt->size / plts[j].plt_entry_size;
5134 plts[j].count = n;
5135 count += n - i;
5136 }
5137
5138 plts[j].contents = plt_contents;
5139 }
5140
5141 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5142 (bfd_vma) 0, plts, dynsyms,
5143 ret);
5144 }
5145
5146 /* Handle an x86-64 specific section when reading an object file. This
5147 is called when elfcode.h finds a section with an unknown type. */
5148
5149 static bfd_boolean
5150 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
5151 const char *name, int shindex)
5152 {
5153 if (hdr->sh_type != SHT_X86_64_UNWIND)
5154 return FALSE;
5155
5156 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
5157 return FALSE;
5158
5159 return TRUE;
5160 }
5161
5162 /* Hook called by the linker routine which adds symbols from an object
5163 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5164 of .bss. */
5165
5166 static bfd_boolean
5167 elf_x86_64_add_symbol_hook (bfd *abfd,
5168 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5169 Elf_Internal_Sym *sym,
5170 const char **namep ATTRIBUTE_UNUSED,
5171 flagword *flagsp ATTRIBUTE_UNUSED,
5172 asection **secp,
5173 bfd_vma *valp)
5174 {
5175 asection *lcomm;
5176
5177 switch (sym->st_shndx)
5178 {
5179 case SHN_X86_64_LCOMMON:
5180 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
5181 if (lcomm == NULL)
5182 {
5183 lcomm = bfd_make_section_with_flags (abfd,
5184 "LARGE_COMMON",
5185 (SEC_ALLOC
5186 | SEC_IS_COMMON
5187 | SEC_LINKER_CREATED));
5188 if (lcomm == NULL)
5189 return FALSE;
5190 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
5191 }
5192 *secp = lcomm;
5193 *valp = sym->st_size;
5194 return TRUE;
5195 }
5196
5197 return TRUE;
5198 }
5199
5200
5201 /* Given a BFD section, try to locate the corresponding ELF section
5202 index. */
5203
5204 static bfd_boolean
5205 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
5206 asection *sec, int *index_return)
5207 {
5208 if (sec == &_bfd_elf_large_com_section)
5209 {
5210 *index_return = SHN_X86_64_LCOMMON;
5211 return TRUE;
5212 }
5213 return FALSE;
5214 }
5215
5216 /* Process a symbol. */
5217
5218 static void
5219 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5220 asymbol *asym)
5221 {
5222 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5223
5224 switch (elfsym->internal_elf_sym.st_shndx)
5225 {
5226 case SHN_X86_64_LCOMMON:
5227 asym->section = &_bfd_elf_large_com_section;
5228 asym->value = elfsym->internal_elf_sym.st_size;
5229 /* Common symbol doesn't set BSF_GLOBAL. */
5230 asym->flags &= ~BSF_GLOBAL;
5231 break;
5232 }
5233 }
5234
5235 static bfd_boolean
5236 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
5237 {
5238 return (sym->st_shndx == SHN_COMMON
5239 || sym->st_shndx == SHN_X86_64_LCOMMON);
5240 }
5241
5242 static unsigned int
5243 elf_x86_64_common_section_index (asection *sec)
5244 {
5245 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5246 return SHN_COMMON;
5247 else
5248 return SHN_X86_64_LCOMMON;
5249 }
5250
5251 static asection *
5252 elf_x86_64_common_section (asection *sec)
5253 {
5254 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5255 return bfd_com_section_ptr;
5256 else
5257 return &_bfd_elf_large_com_section;
5258 }
5259
5260 static bfd_boolean
5261 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
5262 const Elf_Internal_Sym *sym,
5263 asection **psec,
5264 bfd_boolean newdef,
5265 bfd_boolean olddef,
5266 bfd *oldbfd,
5267 const asection *oldsec)
5268 {
5269 /* A normal common symbol and a large common symbol result in a
5270 normal common symbol. We turn the large common symbol into a
5271 normal one. */
5272 if (!olddef
5273 && h->root.type == bfd_link_hash_common
5274 && !newdef
5275 && bfd_is_com_section (*psec)
5276 && oldsec != *psec)
5277 {
5278 if (sym->st_shndx == SHN_COMMON
5279 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
5280 {
5281 h->root.u.c.p->section
5282 = bfd_make_section_old_way (oldbfd, "COMMON");
5283 h->root.u.c.p->section->flags = SEC_ALLOC;
5284 }
5285 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5286 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
5287 *psec = bfd_com_section_ptr;
5288 }
5289
5290 return TRUE;
5291 }
5292
5293 static int
5294 elf_x86_64_additional_program_headers (bfd *abfd,
5295 struct bfd_link_info *info ATTRIBUTE_UNUSED)
5296 {
5297 asection *s;
5298 int count = 0;
5299
5300 /* Check to see if we need a large readonly segment. */
5301 s = bfd_get_section_by_name (abfd, ".lrodata");
5302 if (s && (s->flags & SEC_LOAD))
5303 count++;
5304
5305 /* Check to see if we need a large data segment. Since .lbss sections
5306 is placed right after the .bss section, there should be no need for
5307 a large data segment just because of .lbss. */
5308 s = bfd_get_section_by_name (abfd, ".ldata");
5309 if (s && (s->flags & SEC_LOAD))
5310 count++;
5311
5312 return count;
5313 }
5314
5315 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5316
5317 static bfd_boolean
5318 elf_x86_64_relocs_compatible (const bfd_target *input,
5319 const bfd_target *output)
5320 {
5321 return ((xvec_get_elf_backend_data (input)->s->elfclass
5322 == xvec_get_elf_backend_data (output)->s->elfclass)
5323 && _bfd_elf_relocs_compatible (input, output));
5324 }
5325
5326 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
5327 with GNU properties if found. Otherwise, return NULL. */
5328
5329 static bfd *
5330 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info)
5331 {
5332 struct elf_x86_plt_layout_table plt_layout;
5333
5334 plt_layout.is_vxworks = FALSE;
5335 if (get_elf_x86_64_backend_data (info->output_bfd)->os == is_normal)
5336 {
5337 if (info->bndplt)
5338 {
5339 plt_layout.lazy_plt = &elf_x86_64_lazy_bnd_plt;
5340 plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt;
5341 }
5342 else
5343 {
5344 plt_layout.lazy_plt = &elf_x86_64_lazy_plt;
5345 plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_plt;
5346 }
5347
5348 if (ABI_64_P (info->output_bfd))
5349 {
5350 plt_layout.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
5351 plt_layout.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
5352 }
5353 else
5354 {
5355 plt_layout.lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
5356 plt_layout.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
5357 }
5358 plt_layout.normal_target = TRUE;
5359 }
5360 else
5361 {
5362 plt_layout.lazy_plt = &elf_x86_64_nacl_plt;
5363 plt_layout.non_lazy_plt = NULL;
5364 plt_layout.lazy_ibt_plt = NULL;
5365 plt_layout.non_lazy_ibt_plt = NULL;
5366 plt_layout.normal_target = FALSE;
5367 }
5368
5369 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
5370 }
5371
5372 static const struct bfd_elf_special_section
5373 elf_x86_64_special_sections[]=
5374 {
5375 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5376 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5377 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
5378 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5379 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5380 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5381 { NULL, 0, 0, 0, 0 }
5382 };
5383
5384 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5385 #define TARGET_LITTLE_NAME "elf64-x86-64"
5386 #define ELF_ARCH bfd_arch_i386
5387 #define ELF_TARGET_ID X86_64_ELF_DATA
5388 #define ELF_MACHINE_CODE EM_X86_64
5389 #define ELF_MAXPAGESIZE 0x200000
5390 #define ELF_MINPAGESIZE 0x1000
5391 #define ELF_COMMONPAGESIZE 0x1000
5392
5393 #define elf_backend_can_gc_sections 1
5394 #define elf_backend_can_refcount 1
5395 #define elf_backend_want_got_plt 1
5396 #define elf_backend_plt_readonly 1
5397 #define elf_backend_want_plt_sym 0
5398 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5399 #define elf_backend_rela_normal 1
5400 #define elf_backend_plt_alignment 4
5401 #define elf_backend_extern_protected_data 1
5402 #define elf_backend_caches_rawsize 1
5403 #define elf_backend_dtrel_excludes_plt 1
5404 #define elf_backend_want_dynrelro 1
5405
5406 #define elf_info_to_howto elf_x86_64_info_to_howto
5407
5408 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5409 #define bfd_elf64_bfd_reloc_name_lookup \
5410 elf_x86_64_reloc_name_lookup
5411
5412 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5413 #define elf_backend_check_relocs elf_x86_64_check_relocs
5414 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5415 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5416 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5417 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
5418 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5419 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5420 #ifdef CORE_HEADER
5421 #define elf_backend_write_core_note elf_x86_64_write_core_note
5422 #endif
5423 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5424 #define elf_backend_relocate_section elf_x86_64_relocate_section
5425 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5426 #define elf_backend_object_p elf64_x86_64_elf_object_p
5427 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5428
5429 #define elf_backend_section_from_shdr \
5430 elf_x86_64_section_from_shdr
5431
5432 #define elf_backend_section_from_bfd_section \
5433 elf_x86_64_elf_section_from_bfd_section
5434 #define elf_backend_add_symbol_hook \
5435 elf_x86_64_add_symbol_hook
5436 #define elf_backend_symbol_processing \
5437 elf_x86_64_symbol_processing
5438 #define elf_backend_common_section_index \
5439 elf_x86_64_common_section_index
5440 #define elf_backend_common_section \
5441 elf_x86_64_common_section
5442 #define elf_backend_common_definition \
5443 elf_x86_64_common_definition
5444 #define elf_backend_merge_symbol \
5445 elf_x86_64_merge_symbol
5446 #define elf_backend_special_sections \
5447 elf_x86_64_special_sections
5448 #define elf_backend_additional_program_headers \
5449 elf_x86_64_additional_program_headers
5450 #define elf_backend_setup_gnu_properties \
5451 elf_x86_64_link_setup_gnu_properties
5452
5453 #include "elf64-target.h"
5454
5455 /* CloudABI support. */
5456
5457 #undef TARGET_LITTLE_SYM
5458 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5459 #undef TARGET_LITTLE_NAME
5460 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5461
5462 #undef ELF_OSABI
5463 #define ELF_OSABI ELFOSABI_CLOUDABI
5464
5465 #undef elf64_bed
5466 #define elf64_bed elf64_x86_64_cloudabi_bed
5467
5468 #include "elf64-target.h"
5469
5470 /* FreeBSD support. */
5471
5472 #undef TARGET_LITTLE_SYM
5473 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5474 #undef TARGET_LITTLE_NAME
5475 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5476
5477 #undef ELF_OSABI
5478 #define ELF_OSABI ELFOSABI_FREEBSD
5479
5480 #undef elf64_bed
5481 #define elf64_bed elf64_x86_64_fbsd_bed
5482
5483 #include "elf64-target.h"
5484
5485 /* Solaris 2 support. */
5486
5487 #undef TARGET_LITTLE_SYM
5488 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5489 #undef TARGET_LITTLE_NAME
5490 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5491
5492 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5493 objects won't be recognized. */
5494 #undef ELF_OSABI
5495
5496 #undef elf64_bed
5497 #define elf64_bed elf64_x86_64_sol2_bed
5498
5499 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5500 boundary. */
5501 #undef elf_backend_static_tls_alignment
5502 #define elf_backend_static_tls_alignment 16
5503
5504 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5505
5506 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5507 File, p.63. */
5508 #undef elf_backend_want_plt_sym
5509 #define elf_backend_want_plt_sym 1
5510
5511 #undef elf_backend_strtab_flags
5512 #define elf_backend_strtab_flags SHF_STRINGS
5513
5514 static bfd_boolean
5515 elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5516 bfd *obfd ATTRIBUTE_UNUSED,
5517 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5518 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
5519 {
5520 /* PR 19938: FIXME: Need to add code for setting the sh_info
5521 and sh_link fields of Solaris specific section types. */
5522 return FALSE;
5523 }
5524
5525 #undef elf_backend_copy_special_section_fields
5526 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
5527
5528 #include "elf64-target.h"
5529
5530 /* Native Client support. */
5531
5532 static bfd_boolean
5533 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
5534 {
5535 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5536 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
5537 return TRUE;
5538 }
5539
5540 #undef TARGET_LITTLE_SYM
5541 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
5542 #undef TARGET_LITTLE_NAME
5543 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5544 #undef elf64_bed
5545 #define elf64_bed elf64_x86_64_nacl_bed
5546
5547 #undef ELF_MAXPAGESIZE
5548 #undef ELF_MINPAGESIZE
5549 #undef ELF_COMMONPAGESIZE
5550 #define ELF_MAXPAGESIZE 0x10000
5551 #define ELF_MINPAGESIZE 0x10000
5552 #define ELF_COMMONPAGESIZE 0x10000
5553
5554 /* Restore defaults. */
5555 #undef ELF_OSABI
5556 #undef elf_backend_static_tls_alignment
5557 #undef elf_backend_want_plt_sym
5558 #define elf_backend_want_plt_sym 0
5559 #undef elf_backend_strtab_flags
5560 #undef elf_backend_copy_special_section_fields
5561
5562 /* NaCl uses substantially different PLT entries for the same effects. */
5563
5564 #undef elf_backend_plt_alignment
5565 #define elf_backend_plt_alignment 5
5566 #define NACL_PLT_ENTRY_SIZE 64
5567 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5568
5569 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
5570 {
5571 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5572 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5573 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5574 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5575 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5576
5577 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5578 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
5579
5580 /* 32 bytes of nop to pad out to the standard size. */
5581 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5582 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5583 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5584 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5585 0x66, /* excess data16 prefix */
5586 0x90 /* nop */
5587 };
5588
5589 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5590 {
5591 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5592 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5593 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5594 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5595
5596 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5597 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5598 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5599
5600 /* Lazy GOT entries point here (32-byte aligned). */
5601 0x68, /* pushq immediate */
5602 0, 0, 0, 0, /* replaced with index into relocation table. */
5603 0xe9, /* jmp relative */
5604 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5605
5606 /* 22 bytes of nop to pad out to the standard size. */
5607 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5608 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5609 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5610 };
5611
5612 /* .eh_frame covering the .plt section. */
5613
5614 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
5615 {
5616 #if (PLT_CIE_LENGTH != 20 \
5617 || PLT_FDE_LENGTH != 36 \
5618 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5619 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5620 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5621 #endif
5622 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5623 0, 0, 0, 0, /* CIE ID */
5624 1, /* CIE version */
5625 'z', 'R', 0, /* Augmentation string */
5626 1, /* Code alignment factor */
5627 0x78, /* Data alignment factor */
5628 16, /* Return address column */
5629 1, /* Augmentation size */
5630 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5631 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5632 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5633 DW_CFA_nop, DW_CFA_nop,
5634
5635 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5636 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
5637 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5638 0, 0, 0, 0, /* .plt size goes here */
5639 0, /* Augmentation size */
5640 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
5641 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5642 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
5643 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5644 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5645 13, /* Block length */
5646 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
5647 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
5648 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5649 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
5650 DW_CFA_nop, DW_CFA_nop
5651 };
5652
5653 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt =
5654 {
5655 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
5656 NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */
5657 elf_x86_64_nacl_plt_entry, /* plt_entry */
5658 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5659 2, /* plt0_got1_offset */
5660 9, /* plt0_got2_offset */
5661 13, /* plt0_got2_insn_end */
5662 3, /* plt_got_offset */
5663 33, /* plt_reloc_offset */
5664 38, /* plt_plt_offset */
5665 7, /* plt_got_insn_size */
5666 42, /* plt_plt_insn_end */
5667 32, /* plt_lazy_offset */
5668 elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */
5669 elf_x86_64_nacl_plt_entry, /* pic_plt_entry */
5670 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
5671 sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */
5672 };
5673
5674 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
5675 {
5676 is_nacl /* os */
5677 };
5678
5679 #undef elf_backend_arch_data
5680 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5681
5682 #undef elf_backend_object_p
5683 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5684 #undef elf_backend_modify_segment_map
5685 #define elf_backend_modify_segment_map nacl_modify_segment_map
5686 #undef elf_backend_modify_program_headers
5687 #define elf_backend_modify_program_headers nacl_modify_program_headers
5688 #undef elf_backend_final_write_processing
5689 #define elf_backend_final_write_processing nacl_final_write_processing
5690
5691 #include "elf64-target.h"
5692
5693 /* Native Client x32 support. */
5694
5695 static bfd_boolean
5696 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
5697 {
5698 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5699 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
5700 return TRUE;
5701 }
5702
5703 #undef TARGET_LITTLE_SYM
5704 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
5705 #undef TARGET_LITTLE_NAME
5706 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5707 #undef elf32_bed
5708 #define elf32_bed elf32_x86_64_nacl_bed
5709
5710 #define bfd_elf32_bfd_reloc_type_lookup \
5711 elf_x86_64_reloc_type_lookup
5712 #define bfd_elf32_bfd_reloc_name_lookup \
5713 elf_x86_64_reloc_name_lookup
5714 #define bfd_elf32_get_synthetic_symtab \
5715 elf_x86_64_get_synthetic_symtab
5716
5717 #undef elf_backend_object_p
5718 #define elf_backend_object_p \
5719 elf32_x86_64_nacl_elf_object_p
5720
5721 #undef elf_backend_bfd_from_remote_memory
5722 #define elf_backend_bfd_from_remote_memory \
5723 _bfd_elf32_bfd_from_remote_memory
5724
5725 #undef elf_backend_size_info
5726 #define elf_backend_size_info \
5727 _bfd_elf32_size_info
5728
5729 #include "elf32-target.h"
5730
5731 /* Restore defaults. */
5732 #undef elf_backend_object_p
5733 #define elf_backend_object_p elf64_x86_64_elf_object_p
5734 #undef elf_backend_bfd_from_remote_memory
5735 #undef elf_backend_size_info
5736 #undef elf_backend_modify_segment_map
5737 #undef elf_backend_modify_program_headers
5738 #undef elf_backend_final_write_processing
5739
5740 /* Intel L1OM support. */
5741
5742 static bfd_boolean
5743 elf64_l1om_elf_object_p (bfd *abfd)
5744 {
5745 /* Set the right machine number for an L1OM elf64 file. */
5746 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5747 return TRUE;
5748 }
5749
5750 #undef TARGET_LITTLE_SYM
5751 #define TARGET_LITTLE_SYM l1om_elf64_vec
5752 #undef TARGET_LITTLE_NAME
5753 #define TARGET_LITTLE_NAME "elf64-l1om"
5754 #undef ELF_ARCH
5755 #define ELF_ARCH bfd_arch_l1om
5756
5757 #undef ELF_MACHINE_CODE
5758 #define ELF_MACHINE_CODE EM_L1OM
5759
5760 #undef ELF_OSABI
5761
5762 #undef elf64_bed
5763 #define elf64_bed elf64_l1om_bed
5764
5765 #undef elf_backend_object_p
5766 #define elf_backend_object_p elf64_l1om_elf_object_p
5767
5768 /* Restore defaults. */
5769 #undef ELF_MAXPAGESIZE
5770 #undef ELF_MINPAGESIZE
5771 #undef ELF_COMMONPAGESIZE
5772 #define ELF_MAXPAGESIZE 0x200000
5773 #define ELF_MINPAGESIZE 0x1000
5774 #define ELF_COMMONPAGESIZE 0x1000
5775 #undef elf_backend_plt_alignment
5776 #define elf_backend_plt_alignment 4
5777 #undef elf_backend_arch_data
5778 #define elf_backend_arch_data &elf_x86_64_arch_bed
5779
5780 #include "elf64-target.h"
5781
5782 /* FreeBSD L1OM support. */
5783
5784 #undef TARGET_LITTLE_SYM
5785 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5786 #undef TARGET_LITTLE_NAME
5787 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5788
5789 #undef ELF_OSABI
5790 #define ELF_OSABI ELFOSABI_FREEBSD
5791
5792 #undef elf64_bed
5793 #define elf64_bed elf64_l1om_fbsd_bed
5794
5795 #include "elf64-target.h"
5796
5797 /* Intel K1OM support. */
5798
5799 static bfd_boolean
5800 elf64_k1om_elf_object_p (bfd *abfd)
5801 {
5802 /* Set the right machine number for an K1OM elf64 file. */
5803 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
5804 return TRUE;
5805 }
5806
5807 #undef TARGET_LITTLE_SYM
5808 #define TARGET_LITTLE_SYM k1om_elf64_vec
5809 #undef TARGET_LITTLE_NAME
5810 #define TARGET_LITTLE_NAME "elf64-k1om"
5811 #undef ELF_ARCH
5812 #define ELF_ARCH bfd_arch_k1om
5813
5814 #undef ELF_MACHINE_CODE
5815 #define ELF_MACHINE_CODE EM_K1OM
5816
5817 #undef ELF_OSABI
5818
5819 #undef elf64_bed
5820 #define elf64_bed elf64_k1om_bed
5821
5822 #undef elf_backend_object_p
5823 #define elf_backend_object_p elf64_k1om_elf_object_p
5824
5825 #undef elf_backend_static_tls_alignment
5826
5827 #undef elf_backend_want_plt_sym
5828 #define elf_backend_want_plt_sym 0
5829
5830 #include "elf64-target.h"
5831
5832 /* FreeBSD K1OM support. */
5833
5834 #undef TARGET_LITTLE_SYM
5835 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
5836 #undef TARGET_LITTLE_NAME
5837 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5838
5839 #undef ELF_OSABI
5840 #define ELF_OSABI ELFOSABI_FREEBSD
5841
5842 #undef elf64_bed
5843 #define elf64_bed elf64_k1om_fbsd_bed
5844
5845 #include "elf64-target.h"
5846
5847 /* 32bit x86-64 support. */
5848
5849 #undef TARGET_LITTLE_SYM
5850 #define TARGET_LITTLE_SYM x86_64_elf32_vec
5851 #undef TARGET_LITTLE_NAME
5852 #define TARGET_LITTLE_NAME "elf32-x86-64"
5853 #undef elf32_bed
5854
5855 #undef ELF_ARCH
5856 #define ELF_ARCH bfd_arch_i386
5857
5858 #undef ELF_MACHINE_CODE
5859 #define ELF_MACHINE_CODE EM_X86_64
5860
5861 #undef ELF_OSABI
5862
5863 #undef elf_backend_object_p
5864 #define elf_backend_object_p \
5865 elf32_x86_64_elf_object_p
5866
5867 #undef elf_backend_bfd_from_remote_memory
5868 #define elf_backend_bfd_from_remote_memory \
5869 _bfd_elf32_bfd_from_remote_memory
5870
5871 #undef elf_backend_size_info
5872 #define elf_backend_size_info \
5873 _bfd_elf32_size_info
5874
5875 #include "elf32-target.h"
GDB Binutils - Deliverables
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