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[deliverable/binutils-gdb.git] / bfd / elf64-x86-64.c
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351f65ca 1/* X86-64 specific support for ELF
6f2750fe 2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
8d88c4ca
NC
3 Contributed by Jan Hubicka <jh@suse.cz>.
4
ae9a127f 5 This file is part of BFD, the Binary File Descriptor library.
8d88c4ca 6
ae9a127f
NC
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
cd123cb7 9 the Free Software Foundation; either version 3 of the License, or
ae9a127f 10 (at your option) any later version.
8d88c4ca 11
ae9a127f
NC
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.
8d88c4ca 16
ae9a127f
NC
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
cd123cb7
NC
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
8d88c4ca 21
8d88c4ca 22#include "sysdep.h"
3db64b00 23#include "bfd.h"
c434dee6 24#include "bfdlink.h"
8d88c4ca
NC
25#include "libbfd.h"
26#include "elf-bfd.h"
5a68afcf 27#include "elf-nacl.h"
142411ca 28#include "bfd_stdint.h"
c25bc9fc
L
29#include "objalloc.h"
30#include "hashtab.h"
e41b3a13 31#include "dwarf2.h"
d7921315 32#include "libiberty.h"
8d88c4ca 33
56ceb5b5 34#include "opcode/i386.h"
8d88c4ca
NC
35#include "elf/x86-64.h"
36
8fd79e71
L
37#ifdef CORE_HEADER
38#include <stdarg.h>
39#include CORE_HEADER
40#endif
41
8d88c4ca
NC
42/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
43#define MINUS_ONE (~ (bfd_vma) 0)
44
351f65ca
L
45/* Since both 32-bit and 64-bit x86-64 encode relocation type in the
46 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
47 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
48 since they are the same. */
49
50#define ABI_64_P(abfd) \
51 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
52
8d88c4ca 53/* The relocation "howto" table. Order of fields:
7b81dfbb
AJ
54 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
55 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
70256ad8
AJ
56static reloc_howto_type x86_64_elf_howto_table[] =
57{
6346d5ca 58 HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
b34976b6
AM
59 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
60 FALSE),
61 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
63 FALSE),
64 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
65 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
66 TRUE),
67 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
68 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
69 FALSE),
70 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
71 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
72 TRUE),
73 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
75 FALSE),
76 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
78 MINUS_ONE, FALSE),
79 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
81 MINUS_ONE, FALSE),
82 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
84 MINUS_ONE, FALSE),
85 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
86 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
87 0xffffffff, TRUE),
88 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
89 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
90 FALSE),
91 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
92 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
93 FALSE),
94 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
b0360d8c 96 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
b34976b6 97 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
ac2aa337 98 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
b34976b6
AM
99 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
100 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
101 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
102 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
104 MINUS_ONE, FALSE),
105 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
107 MINUS_ONE, FALSE),
108 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
110 MINUS_ONE, FALSE),
111 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
112 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
113 0xffffffff, TRUE),
114 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
115 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
116 0xffffffff, TRUE),
ac2aa337 117 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
b34976b6
AM
118 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
119 0xffffffff, FALSE),
120 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
121 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
122 0xffffffff, TRUE),
123 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
124 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
125 0xffffffff, FALSE),
d6ab8113
JB
126 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
128 TRUE),
129 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
131 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
132 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
133 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
134 FALSE, 0xffffffff, 0xffffffff, TRUE),
7b81dfbb
AJ
135 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
136 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
137 FALSE),
138 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
139 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
140 MINUS_ONE, TRUE),
141 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
142 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
143 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
144 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
145 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
146 MINUS_ONE, FALSE),
147 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
148 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
149 MINUS_ONE, FALSE),
1788fc08
L
150 HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
151 bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
152 FALSE),
153 HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
154 bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
155 FALSE),
67a4f2b7
AO
156 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
157 complain_overflow_bitfield, bfd_elf_generic_reloc,
158 "R_X86_64_GOTPC32_TLSDESC",
159 FALSE, 0xffffffff, 0xffffffff, TRUE),
160 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
161 complain_overflow_dont, bfd_elf_generic_reloc,
162 "R_X86_64_TLSDESC_CALL",
163 FALSE, 0, 0, FALSE),
164 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
165 complain_overflow_bitfield, bfd_elf_generic_reloc,
166 "R_X86_64_TLSDESC",
167 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
cbe950e9
L
168 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
170 MINUS_ONE, FALSE),
64d25c44
L
171 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
172 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
173 MINUS_ONE, FALSE),
c3320543
L
174 HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
175 bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
176 TRUE),
177 HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
178 bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
179 TRUE),
56ceb5b5
L
180 HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
181 bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff,
182 0xffffffff, TRUE),
183 HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
184 bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff,
185 0xffffffff, TRUE),
fe4770f4 186
a33d77bc
JB
187 /* We have a gap in the reloc numbers here.
188 R_X86_64_standard counts the number up to this point, and
189 R_X86_64_vt_offset is the value to subtract from a reloc type of
190 R_X86_64_GNU_VT* to form an index into this table. */
56ceb5b5 191#define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
a33d77bc
JB
192#define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
193
fe4770f4 194/* GNU extension to record C++ vtable hierarchy. */
b34976b6
AM
195 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
196 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
fe4770f4
AJ
197
198/* GNU extension to record C++ vtable member usage. */
b34976b6
AM
199 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
200 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
d7921315
L
201 FALSE),
202
203/* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
204 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
205 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
206 FALSE)
8d88c4ca
NC
207};
208
d8045f23
NC
209#define IS_X86_64_PCREL_TYPE(TYPE) \
210 ( ((TYPE) == R_X86_64_PC8) \
211 || ((TYPE) == R_X86_64_PC16) \
212 || ((TYPE) == R_X86_64_PC32) \
c3320543 213 || ((TYPE) == R_X86_64_PC32_BND) \
d8045f23
NC
214 || ((TYPE) == R_X86_64_PC64))
215
8d88c4ca 216/* Map BFD relocs to the x86_64 elf relocs. */
70256ad8
AJ
217struct elf_reloc_map
218{
8d88c4ca
NC
219 bfd_reloc_code_real_type bfd_reloc_val;
220 unsigned char elf_reloc_val;
221};
222
dc810e39 223static const struct elf_reloc_map x86_64_reloc_map[] =
8d88c4ca 224{
70256ad8
AJ
225 { BFD_RELOC_NONE, R_X86_64_NONE, },
226 { BFD_RELOC_64, R_X86_64_64, },
227 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
228 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
229 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
230 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
231 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
232 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
233 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
234 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
235 { BFD_RELOC_32, R_X86_64_32, },
236 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
237 { BFD_RELOC_16, R_X86_64_16, },
238 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
239 { BFD_RELOC_8, R_X86_64_8, },
240 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
bffbf940
JJ
241 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
242 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
243 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
244 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
245 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
246 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
247 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
248 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
d6ab8113
JB
249 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
250 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
251 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
7b81dfbb
AJ
252 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
253 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
254 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
255 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
256 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
1788fc08
L
257 { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
258 { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
67a4f2b7
AO
259 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
260 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
261 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
cbe950e9 262 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
56ceb5b5
L
263 { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, },
264 { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, },
265 { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, },
266 { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, },
fe4770f4
AJ
267 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
268 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
8d88c4ca
NC
269};
270
67a4f2b7 271static reloc_howto_type *
351f65ca 272elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
67a4f2b7
AO
273{
274 unsigned i;
275
d7921315
L
276 if (r_type == (unsigned int) R_X86_64_32)
277 {
278 if (ABI_64_P (abfd))
279 i = r_type;
280 else
281 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
282 }
283 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
284 || r_type >= (unsigned int) R_X86_64_max)
67a4f2b7
AO
285 {
286 if (r_type >= (unsigned int) R_X86_64_standard)
287 {
288 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
289 abfd, (int) r_type);
290 r_type = R_X86_64_NONE;
291 }
292 i = r_type;
293 }
294 else
295 i = r_type - (unsigned int) R_X86_64_vt_offset;
296 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
297 return &x86_64_elf_howto_table[i];
298}
8d88c4ca
NC
299
300/* Given a BFD reloc type, return a HOWTO structure. */
301static reloc_howto_type *
351f65ca
L
302elf_x86_64_reloc_type_lookup (bfd *abfd,
303 bfd_reloc_code_real_type code)
8d88c4ca
NC
304{
305 unsigned int i;
27482721 306
8d88c4ca
NC
307 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
308 i++)
309 {
310 if (x86_64_reloc_map[i].bfd_reloc_val == code)
351f65ca
L
311 return elf_x86_64_rtype_to_howto (abfd,
312 x86_64_reloc_map[i].elf_reloc_val);
8d88c4ca 313 }
5860e3f8 314 return NULL;
8d88c4ca
NC
315}
316
157090f7 317static reloc_howto_type *
d7921315 318elf_x86_64_reloc_name_lookup (bfd *abfd,
351f65ca 319 const char *r_name)
157090f7
AM
320{
321 unsigned int i;
322
d7921315
L
323 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
324 {
325 /* Get x32 R_X86_64_32. */
326 reloc_howto_type *reloc
327 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
328 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
329 return reloc;
330 }
331
332 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
157090f7
AM
333 if (x86_64_elf_howto_table[i].name != NULL
334 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
335 return &x86_64_elf_howto_table[i];
336
337 return NULL;
338}
339
8d88c4ca 340/* Given an x86_64 ELF reloc type, fill in an arelent structure. */
8da6118f 341
8d88c4ca 342static void
351f65ca
L
343elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
344 Elf_Internal_Rela *dst)
8d88c4ca 345{
67a4f2b7 346 unsigned r_type;
8d88c4ca 347
351f65ca
L
348 r_type = ELF32_R_TYPE (dst->r_info);
349 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
8d88c4ca
NC
350 BFD_ASSERT (r_type == cache_ptr->howto->type);
351}
70256ad8 352\f
3bab7989 353/* Support for core dump NOTE sections. */
b34976b6 354static bfd_boolean
351f65ca 355elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML
356{
357 int offset;
eea6121a 358 size_t size;
3bab7989
ML
359
360 switch (note->descsz)
361 {
362 default:
b34976b6 363 return FALSE;
3bab7989 364
bcd823f1
L
365 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
366 /* pr_cursig */
228e534f 367 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
bcd823f1
L
368
369 /* pr_pid */
228e534f 370 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
bcd823f1
L
371
372 /* pr_reg */
373 offset = 72;
374 size = 216;
375
376 break;
377
3bab7989
ML
378 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
379 /* pr_cursig */
228e534f 380 elf_tdata (abfd)->core->signal
3bab7989
ML
381 = bfd_get_16 (abfd, note->descdata + 12);
382
383 /* pr_pid */
228e534f 384 elf_tdata (abfd)->core->lwpid
3bab7989
ML
385 = bfd_get_32 (abfd, note->descdata + 32);
386
387 /* pr_reg */
388 offset = 112;
eea6121a 389 size = 216;
3bab7989
ML
390
391 break;
392 }
393
394 /* Make a ".reg/999" section. */
395 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 396 size, note->descpos + offset);
3bab7989
ML
397}
398
b34976b6 399static bfd_boolean
351f65ca 400elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML
401{
402 switch (note->descsz)
403 {
404 default:
b34976b6 405 return FALSE;
3bab7989 406
bcd823f1 407 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
228e534f 408 elf_tdata (abfd)->core->pid
bcd823f1 409 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 410 elf_tdata (abfd)->core->program
bcd823f1 411 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 412 elf_tdata (abfd)->core->command
bcd823f1
L
413 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
414 break;
415
3bab7989 416 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
228e534f 417 elf_tdata (abfd)->core->pid
261b8d08 418 = bfd_get_32 (abfd, note->descdata + 24);
228e534f 419 elf_tdata (abfd)->core->program
3bab7989 420 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
228e534f 421 elf_tdata (abfd)->core->command
3bab7989
ML
422 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
423 }
424
425 /* Note that for some reason, a spurious space is tacked
426 onto the end of the args in some (at least one anyway)
427 implementations, so strip it off if it exists. */
428
429 {
228e534f 430 char *command = elf_tdata (abfd)->core->command;
3bab7989
ML
431 int n = strlen (command);
432
433 if (0 < n && command[n - 1] == ' ')
434 command[n - 1] = '\0';
435 }
436
b34976b6 437 return TRUE;
3bab7989 438}
8fd79e71
L
439
440#ifdef CORE_HEADER
441static char *
442elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
443 int note_type, ...)
444{
445 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8fd79e71
L
446 va_list ap;
447 const char *fname, *psargs;
448 long pid;
449 int cursig;
450 const void *gregs;
451
452 switch (note_type)
453 {
454 default:
455 return NULL;
456
457 case NT_PRPSINFO:
458 va_start (ap, note_type);
459 fname = va_arg (ap, const char *);
460 psargs = va_arg (ap, const char *);
461 va_end (ap);
462
463 if (bed->s->elfclass == ELFCLASS32)
464 {
465 prpsinfo32_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));
e85c6a70
JK
469 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
470 &data, sizeof (data));
8fd79e71
L
471 }
472 else
473 {
b1bd052d 474 prpsinfo64_t data;
8fd79e71
L
475 memset (&data, 0, sizeof (data));
476 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
477 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK
478 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
479 &data, sizeof (data));
8fd79e71 480 }
e85c6a70 481 /* NOTREACHED */
8fd79e71
L
482
483 case NT_PRSTATUS:
484 va_start (ap, note_type);
485 pid = va_arg (ap, long);
486 cursig = va_arg (ap, int);
487 gregs = va_arg (ap, const void *);
488 va_end (ap);
489
490 if (bed->s->elfclass == ELFCLASS32)
491 {
492 if (bed->elf_machine_code == EM_X86_64)
493 {
494 prstatusx32_t prstat;
495 memset (&prstat, 0, sizeof (prstat));
496 prstat.pr_pid = pid;
497 prstat.pr_cursig = cursig;
498 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK
499 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
500 &prstat, sizeof (prstat));
8fd79e71
L
501 }
502 else
503 {
504 prstatus32_t prstat;
505 memset (&prstat, 0, sizeof (prstat));
506 prstat.pr_pid = pid;
507 prstat.pr_cursig = cursig;
508 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK
509 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
510 &prstat, sizeof (prstat));
8fd79e71
L
511 }
512 }
513 else
514 {
b1bd052d 515 prstatus64_t prstat;
8fd79e71
L
516 memset (&prstat, 0, sizeof (prstat));
517 prstat.pr_pid = pid;
518 prstat.pr_cursig = cursig;
519 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK
520 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
521 &prstat, sizeof (prstat));
8fd79e71 522 }
8fd79e71 523 }
e85c6a70 524 /* NOTREACHED */
8fd79e71
L
525}
526#endif
3bab7989 527\f
407443a3 528/* Functions for the x86-64 ELF linker. */
70256ad8 529
407443a3 530/* The name of the dynamic interpreter. This is put in the .interp
70256ad8
AJ
531 section. */
532
351f65ca 533#define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
eec9dd95 534#define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
70256ad8 535
d40d037c
AJ
536/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
537 copying dynamic variables from a shared lib into an app's dynbss
538 section, and instead use a dynamic relocation to point into the
539 shared lib. */
540#define ELIMINATE_COPY_RELOCS 1
541
70256ad8
AJ
542/* The size in bytes of an entry in the global offset table. */
543
544#define GOT_ENTRY_SIZE 8
8d88c4ca 545
70256ad8 546/* The size in bytes of an entry in the procedure linkage table. */
8d88c4ca 547
70256ad8
AJ
548#define PLT_ENTRY_SIZE 16
549
550/* The first entry in a procedure linkage table looks like this. See the
551 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
552
351f65ca 553static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
70256ad8 554{
653165cc
AJ
555 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
556 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
10efb593 557 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
70256ad8
AJ
558};
559
560/* Subsequent entries in a procedure linkage table look like this. */
561
351f65ca 562static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
70256ad8 563{
653165cc 564 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
407443a3 565 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653165cc 566 0x68, /* pushq immediate */
70256ad8
AJ
567 0, 0, 0, 0, /* replaced with index into relocation table. */
568 0xe9, /* jmp relative */
569 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
570};
571
0ff2b86e
L
572/* The first entry in a procedure linkage table with BND relocations
573 like this. */
574
575static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] =
576{
577 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
578 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
579 0x0f, 0x1f, 0 /* nopl (%rax) */
580};
581
582/* Subsequent entries for legacy branches in a procedure linkage table
583 with BND relocations look like this. */
584
585static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] =
586{
587 0x68, 0, 0, 0, 0, /* pushq immediate */
588 0xe9, 0, 0, 0, 0, /* jmpq relative */
589 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
590};
591
592/* Subsequent entries for branches with BND prefx in a procedure linkage
593 table with BND relocations look like this. */
594
595static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] =
596{
597 0x68, 0, 0, 0, 0, /* pushq immediate */
598 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
599 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
600};
601
602/* Entries for legacy branches in the second procedure linkage table
603 look like this. */
604
605static const bfd_byte elf_x86_64_legacy_plt2_entry[8] =
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 second procedure linkage
613 table look like this. */
614
615static const bfd_byte elf_x86_64_bnd_plt2_entry[8] =
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
e41b3a13
JJ
622/* .eh_frame covering the .plt section. */
623
624static const bfd_byte elf_x86_64_eh_frame_plt[] =
625{
626#define PLT_CIE_LENGTH 20
627#define PLT_FDE_LENGTH 36
628#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
629#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
630 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
631 0, 0, 0, 0, /* CIE ID */
632 1, /* CIE version */
633 'z', 'R', 0, /* Augmentation string */
634 1, /* Code alignment factor */
635 0x78, /* Data alignment factor */
636 16, /* Return address column */
637 1, /* Augmentation size */
638 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
639 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
640 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
641 DW_CFA_nop, DW_CFA_nop,
642
643 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
644 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
645 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
646 0, 0, 0, 0, /* .plt size goes here */
647 0, /* Augmentation size */
648 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
649 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
650 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
651 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
652 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
653 11, /* Block length */
654 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
655 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
656 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
657 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
658 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
659};
660
eed180f8
RM
661/* Architecture-specific backend data for x86-64. */
662
663struct elf_x86_64_backend_data
664{
665 /* Templates for the initial PLT entry and for subsequent entries. */
666 const bfd_byte *plt0_entry;
667 const bfd_byte *plt_entry;
668 unsigned int plt_entry_size; /* Size of each PLT entry. */
669
670 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
671 unsigned int plt0_got1_offset;
672 unsigned int plt0_got2_offset;
673
674 /* Offset of the end of the PC-relative instruction containing
675 plt0_got2_offset. */
676 unsigned int plt0_got2_insn_end;
677
678 /* Offsets into plt_entry that are to be replaced with... */
679 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
680 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
681 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
682
683 /* Length of the PC-relative instruction containing plt_got_offset. */
684 unsigned int plt_got_insn_size;
685
686 /* Offset of the end of the PC-relative jump to plt0_entry. */
687 unsigned int plt_plt_insn_end;
688
689 /* Offset into plt_entry where the initial value of the GOT entry points. */
690 unsigned int plt_lazy_offset;
691
692 /* .eh_frame covering the .plt section. */
693 const bfd_byte *eh_frame_plt;
694 unsigned int eh_frame_plt_size;
695};
696
f8222080
L
697#define get_elf_x86_64_arch_data(bed) \
698 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
699
eed180f8 700#define get_elf_x86_64_backend_data(abfd) \
f8222080 701 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
eed180f8
RM
702
703#define GET_PLT_ENTRY_SIZE(abfd) \
704 get_elf_x86_64_backend_data (abfd)->plt_entry_size
705
706/* These are the standard parameters. */
707static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
708 {
709 elf_x86_64_plt0_entry, /* plt0_entry */
710 elf_x86_64_plt_entry, /* plt_entry */
711 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
712 2, /* plt0_got1_offset */
713 8, /* plt0_got2_offset */
714 12, /* plt0_got2_insn_end */
715 2, /* plt_got_offset */
716 7, /* plt_reloc_offset */
717 12, /* plt_plt_offset */
718 6, /* plt_got_insn_size */
719 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
720 6, /* plt_lazy_offset */
721 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
722 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
723 };
724
0ff2b86e
L
725static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed =
726 {
727 elf_x86_64_bnd_plt0_entry, /* plt0_entry */
728 elf_x86_64_bnd_plt_entry, /* plt_entry */
729 sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */
730 2, /* plt0_got1_offset */
731 1+8, /* plt0_got2_offset */
732 1+12, /* plt0_got2_insn_end */
733 1+2, /* plt_got_offset */
734 1, /* plt_reloc_offset */
735 7, /* plt_plt_offset */
736 1+6, /* plt_got_insn_size */
737 11, /* plt_plt_insn_end */
738 0, /* plt_lazy_offset */
739 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
740 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
741 };
742
eed180f8
RM
743#define elf_backend_arch_data &elf_x86_64_arch_bed
744
70256ad8
AJ
745/* x86-64 ELF linker hash entry. */
746
351f65ca 747struct elf_x86_64_link_hash_entry
70256ad8 748{
c434dee6 749 struct elf_link_hash_entry elf;
70256ad8 750
c434dee6 751 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 752 struct elf_dyn_relocs *dyn_relocs;
bffbf940
JJ
753
754#define GOT_UNKNOWN 0
755#define GOT_NORMAL 1
756#define GOT_TLS_GD 2
757#define GOT_TLS_IE 3
67a4f2b7
AO
758#define GOT_TLS_GDESC 4
759#define GOT_TLS_GD_BOTH_P(type) \
760 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
761#define GOT_TLS_GD_P(type) \
762 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
763#define GOT_TLS_GDESC_P(type) \
764 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
765#define GOT_TLS_GD_ANY_P(type) \
766 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
bffbf940 767 unsigned char tls_type;
67a4f2b7 768
bc696fd5
L
769 /* TRUE if a weak symbol with a real definition needs a copy reloc.
770 When there is a weak symbol with a real definition, the processor
771 independent code will have arranged for us to see the real
772 definition first. We need to copy the needs_copy bit from the
773 real definition and check it when allowing copy reloc in PIE. */
774 unsigned int needs_copy : 1;
775
0ff2b86e 776 /* TRUE if symbol has at least one BND relocation. */
bc696fd5 777 unsigned int has_bnd_reloc : 1;
0ff2b86e 778
04ebc307
L
779 /* Reference count of C/C++ function pointer relocations in read-write
780 section which can be resolved at run-time. */
781 bfd_signed_vma func_pointer_refcount;
782
dd7e64d4
L
783 /* Information about the GOT PLT entry. Filled when there are both
784 GOT and PLT relocations against the same function. */
785 union gotplt_union plt_got;
786
0ff2b86e
L
787 /* Information about the second PLT entry. Filled when has_bnd_reloc is
788 set. */
789 union gotplt_union plt_bnd;
790
67a4f2b7
AO
791 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
792 starting at the end of the jump table. */
793 bfd_vma tlsdesc_got;
bffbf940
JJ
794};
795
351f65ca
L
796#define elf_x86_64_hash_entry(ent) \
797 ((struct elf_x86_64_link_hash_entry *)(ent))
bffbf940 798
351f65ca 799struct elf_x86_64_obj_tdata
bffbf940
JJ
800{
801 struct elf_obj_tdata root;
802
803 /* tls_type for each local got entry. */
804 char *local_got_tls_type;
67a4f2b7
AO
805
806 /* GOTPLT entries for TLS descriptors. */
807 bfd_vma *local_tlsdesc_gotent;
70256ad8
AJ
808};
809
351f65ca
L
810#define elf_x86_64_tdata(abfd) \
811 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
bffbf940 812
351f65ca
L
813#define elf_x86_64_local_got_tls_type(abfd) \
814 (elf_x86_64_tdata (abfd)->local_got_tls_type)
bffbf940 815
351f65ca
L
816#define elf_x86_64_local_tlsdesc_gotent(abfd) \
817 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
bffbf940 818
0ffa91dd
NC
819#define is_x86_64_elf(bfd) \
820 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
821 && elf_tdata (bfd) != NULL \
4dfe6ac6 822 && elf_object_id (bfd) == X86_64_ELF_DATA)
0ffa91dd
NC
823
824static bfd_boolean
351f65ca 825elf_x86_64_mkobject (bfd *abfd)
0ffa91dd 826{
351f65ca 827 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
4dfe6ac6 828 X86_64_ELF_DATA);
0ffa91dd
NC
829}
830
c434dee6 831/* x86-64 ELF linker hash table. */
8d88c4ca 832
351f65ca 833struct elf_x86_64_link_hash_table
407443a3 834{
c434dee6 835 struct elf_link_hash_table elf;
70256ad8 836
c434dee6 837 /* Short-cuts to get to dynamic linker sections. */
c434dee6
AJ
838 asection *sdynbss;
839 asection *srelbss;
e41b3a13 840 asection *plt_eh_frame;
0ff2b86e 841 asection *plt_bnd;
dd7e64d4 842 asection *plt_got;
70256ad8 843
4dfe6ac6
NC
844 union
845 {
bffbf940
JJ
846 bfd_signed_vma refcount;
847 bfd_vma offset;
848 } tls_ld_got;
849
67a4f2b7
AO
850 /* The amount of space used by the jump slots in the GOT. */
851 bfd_vma sgotplt_jump_table_size;
852
87d72d41
AM
853 /* Small local sym cache. */
854 struct sym_cache sym_cache;
9f03412a 855
351f65ca
L
856 bfd_vma (*r_info) (bfd_vma, bfd_vma);
857 bfd_vma (*r_sym) (bfd_vma);
248775ba 858 unsigned int pointer_r_type;
351f65ca
L
859 const char *dynamic_interpreter;
860 int dynamic_interpreter_size;
861
9f03412a
AO
862 /* _TLS_MODULE_BASE_ symbol. */
863 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L
864
865 /* Used by local STT_GNU_IFUNC symbols. */
866 htab_t loc_hash_table;
4dfe6ac6
NC
867 void * loc_hash_memory;
868
869 /* The offset into splt of the PLT entry for the TLS descriptor
870 resolver. Special values are 0, if not necessary (or not found
871 to be necessary yet), and -1 if needed but not determined
872 yet. */
873 bfd_vma tlsdesc_plt;
874 /* The offset into sgot of the GOT entry used by the PLT entry
875 above. */
876 bfd_vma tlsdesc_got;
e1f98742
L
877
878 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
879 bfd_vma next_jump_slot_index;
880 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
881 bfd_vma next_irelative_index;
c434dee6 882};
70256ad8
AJ
883
884/* Get the x86-64 ELF linker hash table from a link_info structure. */
8d88c4ca 885
351f65ca 886#define elf_x86_64_hash_table(p) \
4dfe6ac6 887 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
351f65ca 888 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
8d88c4ca 889
351f65ca 890#define elf_x86_64_compute_jump_table_size(htab) \
6de2ae4a 891 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
67a4f2b7 892
407443a3 893/* Create an entry in an x86-64 ELF linker hash table. */
70256ad8
AJ
894
895static struct bfd_hash_entry *
351f65ca
L
896elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
897 struct bfd_hash_table *table,
898 const char *string)
70256ad8 899{
70256ad8 900 /* Allocate the structure if it has not already been allocated by a
c434dee6
AJ
901 subclass. */
902 if (entry == NULL)
903 {
a50b1753 904 entry = (struct bfd_hash_entry *)
eed180f8
RM
905 bfd_hash_allocate (table,
906 sizeof (struct elf_x86_64_link_hash_entry));
c434dee6
AJ
907 if (entry == NULL)
908 return entry;
909 }
70256ad8
AJ
910
911 /* Call the allocation method of the superclass. */
c434dee6
AJ
912 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
913 if (entry != NULL)
70256ad8 914 {
351f65ca 915 struct elf_x86_64_link_hash_entry *eh;
c434dee6 916
351f65ca 917 eh = (struct elf_x86_64_link_hash_entry *) entry;
c434dee6 918 eh->dyn_relocs = NULL;
bffbf940 919 eh->tls_type = GOT_UNKNOWN;
bc696fd5
L
920 eh->needs_copy = 0;
921 eh->has_bnd_reloc = 0;
04ebc307 922 eh->func_pointer_refcount = 0;
0ff2b86e 923 eh->plt_bnd.offset = (bfd_vma) -1;
dd7e64d4 924 eh->plt_got.offset = (bfd_vma) -1;
67a4f2b7 925 eh->tlsdesc_got = (bfd_vma) -1;
70256ad8
AJ
926 }
927
c434dee6 928 return entry;
70256ad8
AJ
929}
930
c25bc9fc
L
931/* Compute a hash of a local hash entry. We use elf_link_hash_entry
932 for local symbol so that we can handle local STT_GNU_IFUNC symbols
933 as global symbol. We reuse indx and dynstr_index for local symbol
934 hash since they aren't used by global symbols in this backend. */
935
936static hashval_t
351f65ca 937elf_x86_64_local_htab_hash (const void *ptr)
c25bc9fc
L
938{
939 struct elf_link_hash_entry *h
940 = (struct elf_link_hash_entry *) ptr;
d2149d72 941 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L
942}
943
944/* Compare local hash entries. */
945
946static int
351f65ca 947elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
c25bc9fc
L
948{
949 struct elf_link_hash_entry *h1
950 = (struct elf_link_hash_entry *) ptr1;
951 struct elf_link_hash_entry *h2
952 = (struct elf_link_hash_entry *) ptr2;
953
954 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
955}
956
957/* Find and/or create a hash entry for local symbol. */
958
959static struct elf_link_hash_entry *
351f65ca
L
960elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
961 bfd *abfd, const Elf_Internal_Rela *rel,
962 bfd_boolean create)
c25bc9fc 963{
351f65ca 964 struct elf_x86_64_link_hash_entry e, *ret;
c25bc9fc 965 asection *sec = abfd->sections;
d2149d72 966 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
351f65ca 967 htab->r_sym (rel->r_info));
c25bc9fc
L
968 void **slot;
969
970 e.elf.indx = sec->id;
351f65ca 971 e.elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc
L
972 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
973 create ? INSERT : NO_INSERT);
974
975 if (!slot)
976 return NULL;
977
978 if (*slot)
979 {
351f65ca 980 ret = (struct elf_x86_64_link_hash_entry *) *slot;
c25bc9fc
L
981 return &ret->elf;
982 }
983
351f65ca 984 ret = (struct elf_x86_64_link_hash_entry *)
c25bc9fc 985 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
351f65ca 986 sizeof (struct elf_x86_64_link_hash_entry));
c25bc9fc
L
987 if (ret)
988 {
989 memset (ret, 0, sizeof (*ret));
990 ret->elf.indx = sec->id;
351f65ca 991 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc 992 ret->elf.dynindx = -1;
04ebc307 993 ret->func_pointer_refcount = 0;
dd7e64d4 994 ret->plt_got.offset = (bfd_vma) -1;
c25bc9fc
L
995 *slot = ret;
996 }
997 return &ret->elf;
998}
999
68faa637
AM
1000/* Destroy an X86-64 ELF linker hash table. */
1001
1002static void
d495ab0d 1003elf_x86_64_link_hash_table_free (bfd *obfd)
68faa637
AM
1004{
1005 struct elf_x86_64_link_hash_table *htab
d495ab0d 1006 = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
68faa637
AM
1007
1008 if (htab->loc_hash_table)
1009 htab_delete (htab->loc_hash_table);
1010 if (htab->loc_hash_memory)
1011 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
d495ab0d 1012 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM
1013}
1014
8d88c4ca
NC
1015/* Create an X86-64 ELF linker hash table. */
1016
1017static struct bfd_link_hash_table *
351f65ca 1018elf_x86_64_link_hash_table_create (bfd *abfd)
8d88c4ca 1019{
351f65ca
L
1020 struct elf_x86_64_link_hash_table *ret;
1021 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
8d88c4ca 1022
7bf52ea2 1023 ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
c434dee6 1024 if (ret == NULL)
8d88c4ca
NC
1025 return NULL;
1026
eb4ff4d6 1027 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
351f65ca
L
1028 elf_x86_64_link_hash_newfunc,
1029 sizeof (struct elf_x86_64_link_hash_entry),
4dfe6ac6 1030 X86_64_ELF_DATA))
8d88c4ca 1031 {
e2d34d7d 1032 free (ret);
8d88c4ca
NC
1033 return NULL;
1034 }
1035
351f65ca
L
1036 if (ABI_64_P (abfd))
1037 {
1038 ret->r_info = elf64_r_info;
1039 ret->r_sym = elf64_r_sym;
248775ba 1040 ret->pointer_r_type = R_X86_64_64;
351f65ca
L
1041 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1042 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1043 }
1044 else
1045 {
1046 ret->r_info = elf32_r_info;
1047 ret->r_sym = elf32_r_sym;
248775ba 1048 ret->pointer_r_type = R_X86_64_32;
351f65ca
L
1049 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1050 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1051 }
1052
c25bc9fc 1053 ret->loc_hash_table = htab_try_create (1024,
351f65ca
L
1054 elf_x86_64_local_htab_hash,
1055 elf_x86_64_local_htab_eq,
c25bc9fc
L
1056 NULL);
1057 ret->loc_hash_memory = objalloc_create ();
1058 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1059 {
d495ab0d 1060 elf_x86_64_link_hash_table_free (abfd);
c25bc9fc
L
1061 return NULL;
1062 }
d495ab0d 1063 ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
c25bc9fc 1064
c434dee6
AJ
1065 return &ret->elf.root;
1066}
1067
c434dee6
AJ
1068/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1069 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1070 hash table. */
1071
b34976b6 1072static bfd_boolean
351f65ca
L
1073elf_x86_64_create_dynamic_sections (bfd *dynobj,
1074 struct bfd_link_info *info)
c434dee6 1075{
351f65ca 1076 struct elf_x86_64_link_hash_table *htab;
c434dee6 1077
c434dee6 1078 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 1079 return FALSE;
c434dee6 1080
351f65ca 1081 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
1082 if (htab == NULL)
1083 return FALSE;
1084
3d4d4302 1085 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
9a926d55 1086 if (!htab->sdynbss)
c434dee6
AJ
1087 abort ();
1088
0e1862bb 1089 if (bfd_link_executable (info))
9a926d55
L
1090 {
1091 /* Always allow copy relocs for building executables. */
9d157cb9 1092 asection *s = bfd_get_linker_section (dynobj, ".rela.bss");
9a926d55
L
1093 if (s == NULL)
1094 {
1095 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1096 s = bfd_make_section_anyway_with_flags (dynobj,
1097 ".rela.bss",
1098 (bed->dynamic_sec_flags
1099 | SEC_READONLY));
1100 if (s == NULL
1101 || ! bfd_set_section_alignment (dynobj, s,
1102 bed->s->log_file_align))
1103 return FALSE;
1104 }
1105 htab->srelbss = s;
1106 }
1107
e41b3a13 1108 if (!info->no_ld_generated_unwind_info
2fe0fd06 1109 && htab->plt_eh_frame == NULL
e4de50d4 1110 && htab->elf.splt != NULL)
e41b3a13 1111 {
bbf96e4e
L
1112 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1113 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1114 | SEC_LINKER_CREATED);
e41b3a13 1115 htab->plt_eh_frame
bbf96e4e 1116 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ
1117 if (htab->plt_eh_frame == NULL
1118 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
1119 return FALSE;
e41b3a13 1120 }
b34976b6 1121 return TRUE;
c434dee6
AJ
1122}
1123
1124/* Copy the extra info we tack onto an elf_link_hash_entry. */
1125
1126static void
351f65ca
L
1127elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1128 struct elf_link_hash_entry *dir,
1129 struct elf_link_hash_entry *ind)
c434dee6 1130{
351f65ca 1131 struct elf_x86_64_link_hash_entry *edir, *eind;
c434dee6 1132
351f65ca
L
1133 edir = (struct elf_x86_64_link_hash_entry *) dir;
1134 eind = (struct elf_x86_64_link_hash_entry *) ind;
c434dee6 1135
0ff2b86e
L
1136 if (!edir->has_bnd_reloc)
1137 edir->has_bnd_reloc = eind->has_bnd_reloc;
1138
c434dee6
AJ
1139 if (eind->dyn_relocs != NULL)
1140 {
1141 if (edir->dyn_relocs != NULL)
1142 {
e03a8ed8
L
1143 struct elf_dyn_relocs **pp;
1144 struct elf_dyn_relocs *p;
c434dee6 1145
fcfa13d2 1146 /* Add reloc counts against the indirect sym to the direct sym
c434dee6
AJ
1147 list. Merge any entries against the same section. */
1148 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1149 {
e03a8ed8 1150 struct elf_dyn_relocs *q;
c434dee6
AJ
1151
1152 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1153 if (q->sec == p->sec)
1154 {
1155 q->pc_count += p->pc_count;
1156 q->count += p->count;
1157 *pp = p->next;
1158 break;
1159 }
1160 if (q == NULL)
1161 pp = &p->next;
1162 }
1163 *pp = edir->dyn_relocs;
1164 }
1165
1166 edir->dyn_relocs = eind->dyn_relocs;
1167 eind->dyn_relocs = NULL;
1168 }
1169
bffbf940
JJ
1170 if (ind->root.type == bfd_link_hash_indirect
1171 && dir->got.refcount <= 0)
1172 {
1173 edir->tls_type = eind->tls_type;
1174 eind->tls_type = GOT_UNKNOWN;
1175 }
1176
d40d037c
AJ
1177 if (ELIMINATE_COPY_RELOCS
1178 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM
1179 && dir->dynamic_adjusted)
1180 {
1181 /* If called to transfer flags for a weakdef during processing
1182 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1183 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1184 dir->ref_dynamic |= ind->ref_dynamic;
1185 dir->ref_regular |= ind->ref_regular;
1186 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1187 dir->needs_plt |= ind->needs_plt;
1188 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1189 }
d40d037c 1190 else
04ebc307
L
1191 {
1192 if (eind->func_pointer_refcount > 0)
1193 {
1194 edir->func_pointer_refcount += eind->func_pointer_refcount;
1195 eind->func_pointer_refcount = 0;
1196 }
1197
1198 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1199 }
8d88c4ca
NC
1200}
1201
b34976b6 1202static bfd_boolean
27482721 1203elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940 1204{
8d88c4ca
NC
1205 /* Set the right machine number for an x86-64 elf64 file. */
1206 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 1207 return TRUE;
8d88c4ca
NC
1208}
1209
8059fb19
RM
1210static bfd_boolean
1211elf32_x86_64_elf_object_p (bfd *abfd)
1212{
1213 /* Set the right machine number for an x86-64 elf32 file. */
1214 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1215 return TRUE;
1216}
1217
142411ca
L
1218/* Return TRUE if the TLS access code sequence support transition
1219 from R_TYPE. */
1220
1221static bfd_boolean
351f65ca
L
1222elf_x86_64_check_tls_transition (bfd *abfd,
1223 struct bfd_link_info *info,
1224 asection *sec,
1225 bfd_byte *contents,
1226 Elf_Internal_Shdr *symtab_hdr,
1227 struct elf_link_hash_entry **sym_hashes,
1228 unsigned int r_type,
1229 const Elf_Internal_Rela *rel,
1230 const Elf_Internal_Rela *relend)
bffbf940 1231{
142411ca
L
1232 unsigned int val;
1233 unsigned long r_symndx;
5c98a14e 1234 bfd_boolean largepic = FALSE;
142411ca
L
1235 struct elf_link_hash_entry *h;
1236 bfd_vma offset;
351f65ca 1237 struct elf_x86_64_link_hash_table *htab;
142411ca
L
1238
1239 /* Get the section contents. */
1240 if (contents == NULL)
1241 {
1242 if (elf_section_data (sec)->this_hdr.contents != NULL)
1243 contents = elf_section_data (sec)->this_hdr.contents;
1244 else
1245 {
1246 /* FIXME: How to better handle error condition? */
1247 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1248 return FALSE;
bffbf940 1249
142411ca
L
1250 /* Cache the section contents for elf_link_input_bfd. */
1251 elf_section_data (sec)->this_hdr.contents = contents;
1252 }
1253 }
1254
351f65ca 1255 htab = elf_x86_64_hash_table (info);
142411ca 1256 offset = rel->r_offset;
bffbf940 1257 switch (r_type)
142411ca
L
1258 {
1259 case R_X86_64_TLSGD:
1260 case R_X86_64_TLSLD:
1261 if ((rel + 1) >= relend)
1262 return FALSE;
1263
1264 if (r_type == R_X86_64_TLSGD)
1265 {
52bc799a 1266 /* Check transition from GD access model. For 64bit, only
142411ca
L
1267 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1268 .word 0x6666; rex64; call __tls_get_addr
52bc799a
L
1269 can transit to different access model. For 32bit, only
1270 leaq foo@tlsgd(%rip), %rdi
1271 .word 0x6666; rex64; call __tls_get_addr
5c98a14e
JJ
1272 can transit to different access model. For largepic
1273 we also support:
1274 leaq foo@tlsgd(%rip), %rdi
1275 movabsq $__tls_get_addr@pltoff, %rax
1276 addq $rbx, %rax
1277 call *%rax. */
142411ca 1278
fa289a5f
AM
1279 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1280 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1281
5c98a14e 1282 if ((offset + 12) > sec->size)
142411ca 1283 return FALSE;
52bc799a 1284
5c98a14e
JJ
1285 if (memcmp (contents + offset + 4, call, 4) != 0)
1286 {
1287 if (!ABI_64_P (abfd)
1288 || (offset + 19) > sec->size
1289 || offset < 3
1290 || memcmp (contents + offset - 3, leaq + 1, 3) != 0
1291 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1292 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1293 != 0)
1294 return FALSE;
1295 largepic = TRUE;
1296 }
1297 else if (ABI_64_P (abfd))
52bc799a 1298 {
52bc799a 1299 if (offset < 4
fa289a5f 1300 || memcmp (contents + offset - 4, leaq, 4) != 0)
52bc799a
L
1301 return FALSE;
1302 }
1303 else
1304 {
52bc799a 1305 if (offset < 3
fa289a5f 1306 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
52bc799a
L
1307 return FALSE;
1308 }
142411ca
L
1309 }
1310 else
1311 {
1312 /* Check transition from LD access model. Only
1313 leaq foo@tlsld(%rip), %rdi;
1314 call __tls_get_addr
5c98a14e
JJ
1315 can transit to different access model. For largepic
1316 we also support:
1317 leaq foo@tlsld(%rip), %rdi
1318 movabsq $__tls_get_addr@pltoff, %rax
1319 addq $rbx, %rax
1320 call *%rax. */
142411ca 1321
fa289a5f 1322 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
142411ca
L
1323
1324 if (offset < 3 || (offset + 9) > sec->size)
1325 return FALSE;
1326
5c98a14e 1327 if (memcmp (contents + offset - 3, lea, 3) != 0)
142411ca 1328 return FALSE;
5c98a14e
JJ
1329
1330 if (0xe8 != *(contents + offset + 4))
1331 {
1332 if (!ABI_64_P (abfd)
1333 || (offset + 19) > sec->size
1334 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1335 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1336 != 0)
1337 return FALSE;
1338 largepic = TRUE;
1339 }
142411ca
L
1340 }
1341
351f65ca 1342 r_symndx = htab->r_sym (rel[1].r_info);
142411ca
L
1343 if (r_symndx < symtab_hdr->sh_info)
1344 return FALSE;
1345
1346 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b 1347 /* Use strncmp to check __tls_get_addr since __tls_get_addr
eed180f8 1348 may be versioned. */
142411ca
L
1349 return (h != NULL
1350 && h->root.root.string != NULL
5c98a14e
JJ
1351 && (largepic
1352 ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64
1353 : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1354 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32))
c4fb387b
L
1355 && (strncmp (h->root.root.string,
1356 "__tls_get_addr", 14) == 0));
142411ca
L
1357
1358 case R_X86_64_GOTTPOFF:
1359 /* Check transition from IE access model:
4a4c5f25
L
1360 mov foo@gottpoff(%rip), %reg
1361 add foo@gottpoff(%rip), %reg
142411ca
L
1362 */
1363
4a4c5f25
L
1364 /* Check REX prefix first. */
1365 if (offset >= 3 && (offset + 4) <= sec->size)
1366 {
1367 val = bfd_get_8 (abfd, contents + offset - 3);
1368 if (val != 0x48 && val != 0x4c)
1369 {
1370 /* X32 may have 0x44 REX prefix or no REX prefix. */
1371 if (ABI_64_P (abfd))
1372 return FALSE;
1373 }
1374 }
1375 else
1376 {
1377 /* X32 may not have any REX prefix. */
1378 if (ABI_64_P (abfd))
1379 return FALSE;
1380 if (offset < 2 || (offset + 3) > sec->size)
1381 return FALSE;
1382 }
142411ca
L
1383
1384 val = bfd_get_8 (abfd, contents + offset - 2);
1385 if (val != 0x8b && val != 0x03)
1386 return FALSE;
1387
1388 val = bfd_get_8 (abfd, contents + offset - 1);
1389 return (val & 0xc7) == 5;
1390
1391 case R_X86_64_GOTPC32_TLSDESC:
1392 /* Check transition from GDesc access model:
1393 leaq x@tlsdesc(%rip), %rax
1394
1395 Make sure it's a leaq adding rip to a 32-bit offset
1396 into any register, although it's probably almost always
1397 going to be rax. */
1398
1399 if (offset < 3 || (offset + 4) > sec->size)
1400 return FALSE;
1401
1402 val = bfd_get_8 (abfd, contents + offset - 3);
1403 if ((val & 0xfb) != 0x48)
1404 return FALSE;
1405
1406 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1407 return FALSE;
1408
1409 val = bfd_get_8 (abfd, contents + offset - 1);
1410 return (val & 0xc7) == 0x05;
1411
1412 case R_X86_64_TLSDESC_CALL:
1413 /* Check transition from GDesc access model:
1414 call *x@tlsdesc(%rax)
1415 */
1416 if (offset + 2 <= sec->size)
1417 {
1418 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM
1419 static const unsigned char call[] = { 0xff, 0x10 };
1420 return memcmp (contents + offset, call, 2) == 0;
142411ca
L
1421 }
1422
1423 return FALSE;
1424
1425 default:
1426 abort ();
1427 }
1428}
1429
1430/* Return TRUE if the TLS access transition is OK or no transition
1431 will be performed. Update R_TYPE if there is a transition. */
1432
1433static bfd_boolean
351f65ca
L
1434elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1435 asection *sec, bfd_byte *contents,
1436 Elf_Internal_Shdr *symtab_hdr,
1437 struct elf_link_hash_entry **sym_hashes,
1438 unsigned int *r_type, int tls_type,
1439 const Elf_Internal_Rela *rel,
1440 const Elf_Internal_Rela *relend,
1441 struct elf_link_hash_entry *h,
1442 unsigned long r_symndx)
142411ca
L
1443{
1444 unsigned int from_type = *r_type;
1445 unsigned int to_type = from_type;
1446 bfd_boolean check = TRUE;
1447
bb1cb422
L
1448 /* Skip TLS transition for functions. */
1449 if (h != NULL
1450 && (h->type == STT_FUNC
1451 || h->type == STT_GNU_IFUNC))
1452 return TRUE;
1453
142411ca 1454 switch (from_type)
bffbf940
JJ
1455 {
1456 case R_X86_64_TLSGD:
67a4f2b7
AO
1457 case R_X86_64_GOTPC32_TLSDESC:
1458 case R_X86_64_TLSDESC_CALL:
bffbf940 1459 case R_X86_64_GOTTPOFF:
0e1862bb 1460 if (bfd_link_executable (info))
142411ca
L
1461 {
1462 if (h == NULL)
1463 to_type = R_X86_64_TPOFF32;
1464 else
1465 to_type = R_X86_64_GOTTPOFF;
1466 }
1467
351f65ca 1468 /* When we are called from elf_x86_64_relocate_section,
142411ca
L
1469 CONTENTS isn't NULL and there may be additional transitions
1470 based on TLS_TYPE. */
1471 if (contents != NULL)
1472 {
1473 unsigned int new_to_type = to_type;
1474
0e1862bb 1475 if (bfd_link_executable (info)
142411ca
L
1476 && h != NULL
1477 && h->dynindx == -1
1478 && tls_type == GOT_TLS_IE)
1479 new_to_type = R_X86_64_TPOFF32;
1480
1481 if (to_type == R_X86_64_TLSGD
1482 || to_type == R_X86_64_GOTPC32_TLSDESC
1483 || to_type == R_X86_64_TLSDESC_CALL)
1484 {
1485 if (tls_type == GOT_TLS_IE)
1486 new_to_type = R_X86_64_GOTTPOFF;
1487 }
1488
1489 /* We checked the transition before when we were called from
351f65ca 1490 elf_x86_64_check_relocs. We only want to check the new
142411ca
L
1491 transition which hasn't been checked before. */
1492 check = new_to_type != to_type && from_type == to_type;
1493 to_type = new_to_type;
1494 }
1495
1496 break;
1497
bffbf940 1498 case R_X86_64_TLSLD:
0e1862bb 1499 if (bfd_link_executable (info))
142411ca
L
1500 to_type = R_X86_64_TPOFF32;
1501 break;
1502
1503 default:
1504 return TRUE;
bffbf940
JJ
1505 }
1506
142411ca
L
1507 /* Return TRUE if there is no transition. */
1508 if (from_type == to_type)
1509 return TRUE;
1510
1511 /* Check if the transition can be performed. */
1512 if (check
351f65ca
L
1513 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1514 symtab_hdr, sym_hashes,
1515 from_type, rel, relend))
142411ca 1516 {
2f629d23 1517 reloc_howto_type *from, *to;
4c544807 1518 const char *name;
142411ca 1519
351f65ca
L
1520 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1521 to = elf_x86_64_rtype_to_howto (abfd, to_type);
142411ca 1522
4c544807
L
1523 if (h)
1524 name = h->root.root.string;
1525 else
1526 {
351f65ca 1527 struct elf_x86_64_link_hash_table *htab;
4dfe6ac6 1528
351f65ca 1529 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
1530 if (htab == NULL)
1531 name = "*unknown*";
1532 else
1533 {
1534 Elf_Internal_Sym *isym;
1535
1536 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1537 abfd, r_symndx);
1538 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1539 }
4c544807
L
1540 }
1541
142411ca
L
1542 (*_bfd_error_handler)
1543 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1544 "in section `%A' failed"),
4c544807 1545 abfd, sec, from->name, to->name, name,
142411ca
L
1546 (unsigned long) rel->r_offset);
1547 bfd_set_error (bfd_error_bad_value);
1548 return FALSE;
1549 }
1550
1551 *r_type = to_type;
1552 return TRUE;
bffbf940
JJ
1553}
1554
c1d11331
L
1555/* Rename some of the generic section flags to better document how they
1556 are used here. */
56ceb5b5 1557#define need_convert_load sec_flg0
c1d11331 1558
70256ad8 1559/* Look through the relocs for a section during the first phase, and
c434dee6
AJ
1560 calculate needed space in the global offset table, procedure
1561 linkage table, and dynamic reloc sections. */
70256ad8 1562
b34976b6 1563static bfd_boolean
351f65ca
L
1564elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1565 asection *sec,
1566 const Elf_Internal_Rela *relocs)
70256ad8 1567{
351f65ca 1568 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ
1569 Elf_Internal_Shdr *symtab_hdr;
1570 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ
1571 const Elf_Internal_Rela *rel;
1572 const Elf_Internal_Rela *rel_end;
70256ad8 1573 asection *sreloc;
dd7e64d4 1574 bfd_boolean use_plt_got;
70256ad8 1575
0e1862bb 1576 if (bfd_link_relocatable (info))
b34976b6 1577 return TRUE;
70256ad8 1578
0ffa91dd
NC
1579 BFD_ASSERT (is_x86_64_elf (abfd));
1580
351f65ca 1581 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
1582 if (htab == NULL)
1583 return FALSE;
1584
dd7e64d4
L
1585 use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed;
1586
0ffa91dd 1587 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8 1588 sym_hashes = elf_sym_hashes (abfd);
70256ad8 1589
c434dee6 1590 sreloc = NULL;
cbe950e9 1591
70256ad8
AJ
1592 rel_end = relocs + sec->reloc_count;
1593 for (rel = relocs; rel < rel_end; rel++)
1594 {
bffbf940 1595 unsigned int r_type;
70256ad8
AJ
1596 unsigned long r_symndx;
1597 struct elf_link_hash_entry *h;
4c544807
L
1598 Elf_Internal_Sym *isym;
1599 const char *name;
06a6a421 1600 bfd_boolean size_reloc;
70256ad8 1601
351f65ca
L
1602 r_symndx = htab->r_sym (rel->r_info);
1603 r_type = ELF32_R_TYPE (rel->r_info);
c434dee6
AJ
1604
1605 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1606 {
d003868e
AM
1607 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1608 abfd, r_symndx);
b34976b6 1609 return FALSE;
c434dee6
AJ
1610 }
1611
70256ad8 1612 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L
1613 {
1614 /* A local symbol. */
c2e61a4e
L
1615 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1616 abfd, r_symndx);
1617 if (isym == NULL)
1618 return FALSE;
c25bc9fc
L
1619
1620 /* Check relocation against local STT_GNU_IFUNC symbol. */
351f65ca 1621 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
c25bc9fc 1622 {
351f65ca
L
1623 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1624 TRUE);
c25bc9fc 1625 if (h == NULL)
c2e61a4e 1626 return FALSE;
6bbec505 1627
c25bc9fc
L
1628 /* Fake a STT_GNU_IFUNC symbol. */
1629 h->type = STT_GNU_IFUNC;
1630 h->def_regular = 1;
1631 h->ref_regular = 1;
1632 h->forced_local = 1;
1633 h->root.type = bfd_link_hash_defined;
1634 }
1635 else
1636 h = NULL;
1637 }
70256ad8 1638 else
71cb9464 1639 {
4c544807 1640 isym = NULL;
71cb9464
L
1641 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1642 while (h->root.type == bfd_link_hash_indirect
1643 || h->root.type == bfd_link_hash_warning)
1644 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1645 }
cbe950e9 1646
d1534d16
L
1647 /* Check invalid x32 relocations. */
1648 if (!ABI_64_P (abfd))
1649 switch (r_type)
1650 {
1651 default:
1652 break;
1653
d1534d16
L
1654 case R_X86_64_DTPOFF64:
1655 case R_X86_64_TPOFF64:
1656 case R_X86_64_PC64:
1657 case R_X86_64_GOTOFF64:
1658 case R_X86_64_GOT64:
1659 case R_X86_64_GOTPCREL64:
1660 case R_X86_64_GOTPC64:
1661 case R_X86_64_GOTPLT64:
1662 case R_X86_64_PLTOFF64:
1663 {
1664 if (h)
1665 name = h->root.root.string;
1666 else
1667 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1668 NULL);
1669 (*_bfd_error_handler)
1670 (_("%B: relocation %s against symbol `%s' isn't "
1671 "supported in x32 mode"), abfd,
1672 x86_64_elf_howto_table[r_type].name, name);
1673 bfd_set_error (bfd_error_bad_value);
1674 return FALSE;
1675 }
1676 break;
1677 }
1678
c25bc9fc
L
1679 if (h != NULL)
1680 {
cbe950e9
L
1681 /* Create the ifunc sections for static executables. If we
1682 never see an indirect function symbol nor we are building
1683 a static executable, those sections will be empty and
1684 won't appear in output. */
1685 switch (r_type)
1686 {
1687 default:
1688 break;
1689
0ff2b86e
L
1690 case R_X86_64_PC32_BND:
1691 case R_X86_64_PLT32_BND:
d258b828
IZ
1692 case R_X86_64_PC32:
1693 case R_X86_64_PLT32:
1694 case R_X86_64_32:
1695 case R_X86_64_64:
0ff2b86e
L
1696 /* MPX PLT is supported only if elf_x86_64_arch_bed
1697 is used in 64-bit mode. */
1698 if (ABI_64_P (abfd)
d258b828
IZ
1699 && info->bndplt
1700 && (get_elf_x86_64_backend_data (abfd)
1701 == &elf_x86_64_arch_bed))
0ff2b86e 1702 {
bc696fd5 1703 elf_x86_64_hash_entry (h)->has_bnd_reloc = 1;
0ff2b86e
L
1704
1705 /* Create the second PLT for Intel MPX support. */
1706 if (htab->plt_bnd == NULL)
1707 {
1708 unsigned int plt_bnd_align;
1709 const struct elf_backend_data *bed;
1710
1711 bed = get_elf_backend_data (info->output_bfd);
6db50b4c
L
1712 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8
1713 && (sizeof (elf_x86_64_bnd_plt2_entry)
1714 == sizeof (elf_x86_64_legacy_plt2_entry)));
1715 plt_bnd_align = 3;
0ff2b86e
L
1716
1717 if (htab->elf.dynobj == NULL)
1718 htab->elf.dynobj = abfd;
1719 htab->plt_bnd
1720 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1721 ".plt.bnd",
1722 (bed->dynamic_sec_flags
1723 | SEC_ALLOC
1724 | SEC_CODE
1725 | SEC_LOAD
1726 | SEC_READONLY));
1727 if (htab->plt_bnd == NULL
1728 || !bfd_set_section_alignment (htab->elf.dynobj,
1729 htab->plt_bnd,
1730 plt_bnd_align))
1731 return FALSE;
1732 }
1733 }
1734
cbe950e9 1735 case R_X86_64_32S:
cbe950e9 1736 case R_X86_64_PC64:
cbe950e9 1737 case R_X86_64_GOTPCREL:
56ceb5b5
L
1738 case R_X86_64_GOTPCRELX:
1739 case R_X86_64_REX_GOTPCRELX:
cbe950e9 1740 case R_X86_64_GOTPCREL64:
9d4057ee
AM
1741 if (htab->elf.dynobj == NULL)
1742 htab->elf.dynobj = abfd;
1743 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
c2e61a4e 1744 return FALSE;
cbe950e9
L
1745 break;
1746 }
1747
ad1e85de
L
1748 /* It is referenced by a non-shared object. */
1749 h->ref_regular = 1;
61315175 1750 h->root.non_ir_ref = 1;
13a2df29
L
1751
1752 if (h->type == STT_GNU_IFUNC)
1753 elf_tdata (info->output_bfd)->has_gnu_symbols
1754 |= elf_gnu_symbol_ifunc;
71cb9464 1755 }
70256ad8 1756
351f65ca
L
1757 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1758 symtab_hdr, sym_hashes,
1759 &r_type, GOT_UNKNOWN,
1760 rel, rel_end, h, r_symndx))
c2e61a4e 1761 return FALSE;
142411ca 1762
bffbf940 1763 switch (r_type)
70256ad8 1764 {
bffbf940
JJ
1765 case R_X86_64_TLSLD:
1766 htab->tls_ld_got.refcount += 1;
1767 goto create_got;
1768
1769 case R_X86_64_TPOFF32:
0e1862bb 1770 if (!bfd_link_executable (info) && ABI_64_P (abfd))
70256ad8 1771 {
09a24cbf 1772 if (h)
4c544807
L
1773 name = h->root.root.string;
1774 else
1775 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1776 NULL);
bffbf940 1777 (*_bfd_error_handler)
d003868e
AM
1778 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1779 abfd,
4c544807 1780 x86_64_elf_howto_table[r_type].name, name);
bffbf940 1781 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1782 return FALSE;
70256ad8 1783 }
bffbf940 1784 break;
c434dee6 1785
bffbf940 1786 case R_X86_64_GOTTPOFF:
0e1862bb 1787 if (!bfd_link_executable (info))
bffbf940
JJ
1788 info->flags |= DF_STATIC_TLS;
1789 /* Fall through */
70256ad8 1790
bffbf940
JJ
1791 case R_X86_64_GOT32:
1792 case R_X86_64_GOTPCREL:
56ceb5b5
L
1793 case R_X86_64_GOTPCRELX:
1794 case R_X86_64_REX_GOTPCRELX:
bffbf940 1795 case R_X86_64_TLSGD:
7b81dfbb
AJ
1796 case R_X86_64_GOT64:
1797 case R_X86_64_GOTPCREL64:
1798 case R_X86_64_GOTPLT64:
67a4f2b7
AO
1799 case R_X86_64_GOTPC32_TLSDESC:
1800 case R_X86_64_TLSDESC_CALL:
bffbf940
JJ
1801 /* This symbol requires a global offset table entry. */
1802 {
1803 int tls_type, old_tls_type;
1804
1805 switch (r_type)
1806 {
1807 default: tls_type = GOT_NORMAL; break;
1808 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1809 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
67a4f2b7
AO
1810 case R_X86_64_GOTPC32_TLSDESC:
1811 case R_X86_64_TLSDESC_CALL:
1812 tls_type = GOT_TLS_GDESC; break;
bffbf940
JJ
1813 }
1814
1815 if (h != NULL)
1816 {
1817 h->got.refcount += 1;
351f65ca 1818 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
bffbf940
JJ
1819 }
1820 else
1821 {
1822 bfd_signed_vma *local_got_refcounts;
1823
1824 /* This is a global offset table entry for a local symbol. */
1825 local_got_refcounts = elf_local_got_refcounts (abfd);
1826 if (local_got_refcounts == NULL)
1827 {
1828 bfd_size_type size;
1829
1830 size = symtab_hdr->sh_info;
67a4f2b7
AO
1831 size *= sizeof (bfd_signed_vma)
1832 + sizeof (bfd_vma) + sizeof (char);
bffbf940
JJ
1833 local_got_refcounts = ((bfd_signed_vma *)
1834 bfd_zalloc (abfd, size));
1835 if (local_got_refcounts == NULL)
c2e61a4e 1836 return FALSE;
bffbf940 1837 elf_local_got_refcounts (abfd) = local_got_refcounts;
351f65ca 1838 elf_x86_64_local_tlsdesc_gotent (abfd)
67a4f2b7 1839 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
351f65ca 1840 elf_x86_64_local_got_tls_type (abfd)
67a4f2b7 1841 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
bffbf940
JJ
1842 }
1843 local_got_refcounts[r_symndx] += 1;
1844 old_tls_type
351f65ca 1845 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
bffbf940
JJ
1846 }
1847
1848 /* If a TLS symbol is accessed using IE at least once,
1849 there is no point to use dynamic model for it. */
1850 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7
AO
1851 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1852 || tls_type != GOT_TLS_IE))
bffbf940 1853 {
67a4f2b7 1854 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
bffbf940 1855 tls_type = old_tls_type;
67a4f2b7
AO
1856 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1857 && GOT_TLS_GD_ANY_P (tls_type))
1858 tls_type |= old_tls_type;
bffbf940
JJ
1859 else
1860 {
09a24cbf 1861 if (h)
4c544807
L
1862 name = h->root.root.string;
1863 else
1864 name = bfd_elf_sym_name (abfd, symtab_hdr,
1865 isym, NULL);
bffbf940 1866 (*_bfd_error_handler)
1f7a4e42 1867 (_("%B: '%s' accessed both as normal and thread local symbol"),
4c544807 1868 abfd, name);
68c4a57e 1869 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1870 return FALSE;
bffbf940
JJ
1871 }
1872 }
1873
1874 if (old_tls_type != tls_type)
1875 {
1876 if (h != NULL)
351f65ca 1877 elf_x86_64_hash_entry (h)->tls_type = tls_type;
bffbf940 1878 else
351f65ca 1879 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
bffbf940
JJ
1880 }
1881 }
c434dee6
AJ
1882 /* Fall through */
1883
d6ab8113
JB
1884 case R_X86_64_GOTOFF64:
1885 case R_X86_64_GOTPC32:
7b81dfbb 1886 case R_X86_64_GOTPC64:
bffbf940 1887 create_got:
6de2ae4a 1888 if (htab->elf.sgot == NULL)
c434dee6
AJ
1889 {
1890 if (htab->elf.dynobj == NULL)
1891 htab->elf.dynobj = abfd;
6de2ae4a
L
1892 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1893 info))
c2e61a4e 1894 return FALSE;
c434dee6 1895 }
70256ad8
AJ
1896 break;
1897
1898 case R_X86_64_PLT32:
c3320543 1899 case R_X86_64_PLT32_BND:
70256ad8 1900 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ
1901 actually build the entry in adjust_dynamic_symbol,
1902 because this might be a case of linking PIC code which is
1903 never referenced by a dynamic object, in which case we
1904 don't need to generate a procedure linkage table entry
1905 after all. */
70256ad8
AJ
1906
1907 /* If this is a local symbol, we resolve it directly without
407443a3 1908 creating a procedure linkage table entry. */
70256ad8
AJ
1909 if (h == NULL)
1910 continue;
1911
f5385ebf 1912 h->needs_plt = 1;
51b64d56 1913 h->plt.refcount += 1;
70256ad8
AJ
1914 break;
1915
7b81dfbb
AJ
1916 case R_X86_64_PLTOFF64:
1917 /* This tries to form the 'address' of a function relative
1918 to GOT. For global symbols we need a PLT entry. */
1919 if (h != NULL)
1920 {
1921 h->needs_plt = 1;
1922 h->plt.refcount += 1;
1923 }
1924 goto create_got;
1925
6a3e1bae
L
1926 case R_X86_64_SIZE32:
1927 case R_X86_64_SIZE64:
06a6a421 1928 size_reloc = TRUE;
6a3e1bae
L
1929 goto do_size;
1930
248775ba
L
1931 case R_X86_64_32:
1932 if (!ABI_64_P (abfd))
1933 goto pointer;
cc78d0af
AJ
1934 case R_X86_64_8:
1935 case R_X86_64_16:
70256ad8 1936 case R_X86_64_32S:
1b71fb54
AJ
1937 /* Let's help debug shared library creation. These relocs
1938 cannot be used in shared libs. Don't error out for
1939 sections we don't care about, such as debug sections or
1940 non-constant sections. */
0e1862bb 1941 if (bfd_link_pic (info)
1b71fb54
AJ
1942 && (sec->flags & SEC_ALLOC) != 0
1943 && (sec->flags & SEC_READONLY) != 0)
1944 {
09a24cbf 1945 if (h)
4c544807
L
1946 name = h->root.root.string;
1947 else
1948 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1b71fb54 1949 (*_bfd_error_handler)
d003868e 1950 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
4c544807 1951 abfd, x86_64_elf_howto_table[r_type].name, name);
1b71fb54 1952 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1953 return FALSE;
1b71fb54
AJ
1954 }
1955 /* Fall through. */
1956
c434dee6
AJ
1957 case R_X86_64_PC8:
1958 case R_X86_64_PC16:
70256ad8 1959 case R_X86_64_PC32:
c3320543 1960 case R_X86_64_PC32_BND:
d6ab8113 1961 case R_X86_64_PC64:
1b71fb54 1962 case R_X86_64_64:
248775ba 1963pointer:
0e1862bb 1964 if (h != NULL && bfd_link_executable (info))
c434dee6
AJ
1965 {
1966 /* If this reloc is in a read-only section, we might
1967 need a copy reloc. We can't check reliably at this
1968 stage whether the section is read-only, as input
1969 sections have not yet been mapped to output sections.
1970 Tentatively set the flag for now, and correct in
1971 adjust_dynamic_symbol. */
f5385ebf 1972 h->non_got_ref = 1;
c434dee6
AJ
1973
1974 /* We may need a .plt entry if the function this reloc
1975 refers to is in a shared lib. */
1976 h->plt.refcount += 1;
5db4f0d3
L
1977 if (r_type == R_X86_64_PC32)
1978 {
1979 /* Since something like ".long foo - ." may be used
1980 as pointer, make sure that PLT is used if foo is
1981 a function defined in a shared library. */
1982 if ((sec->flags & SEC_CODE) == 0)
1983 h->pointer_equality_needed = 1;
1984 }
1985 else if (r_type != R_X86_64_PC32_BND
1986 && r_type != R_X86_64_PC64)
04ebc307
L
1987 {
1988 h->pointer_equality_needed = 1;
1989 /* At run-time, R_X86_64_64 can be resolved for both
1990 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
1991 can only be resolved for x32. */
1992 if ((sec->flags & SEC_READONLY) == 0
1993 && (r_type == R_X86_64_64
1994 || (!ABI_64_P (abfd)
1995 && (r_type == R_X86_64_32
1996 || r_type == R_X86_64_32S))))
1997 {
1998 struct elf_x86_64_link_hash_entry *eh
1999 = (struct elf_x86_64_link_hash_entry *) h;
2000 eh->func_pointer_refcount += 1;
2001 }
2002 }
c434dee6 2003 }
70256ad8 2004
06a6a421 2005 size_reloc = FALSE;
6a3e1bae 2006do_size:
70256ad8
AJ
2007 /* If we are creating a shared library, and this is a reloc
2008 against a global symbol, or a non PC relative reloc
2009 against a local symbol, then we need to copy the reloc
2010 into the shared library. However, if we are linking with
2011 -Bsymbolic, we do not need to copy a reloc against a
2012 global symbol which is defined in an object we are
407443a3 2013 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ
2014 this point we have not seen all the input files, so it is
2015 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ
2016 later (it is never cleared). In case of a weak definition,
2017 DEF_REGULAR may be cleared later by a strong definition in
2018 a shared library. We account for that possibility below by
2019 storing information in the relocs_copied field of the hash
2020 table entry. A similar situation occurs when creating
2021 shared libraries and symbol visibility changes render the
31c0ebfe 2022 symbol local.
c434dee6
AJ
2023
2024 If on the other hand, we are creating an executable, we
2025 may need to keep relocations for symbols satisfied by a
2026 dynamic library if we manage to avoid copy relocs for the
0f88be7a 2027 symbol. */
0e1862bb 2028 if ((bfd_link_pic (info)
c434dee6 2029 && (sec->flags & SEC_ALLOC) != 0
d8045f23 2030 && (! IS_X86_64_PCREL_TYPE (r_type)
c434dee6 2031 || (h != NULL
55255dae 2032 && (! SYMBOLIC_BIND (info, h)
c434dee6 2033 || h->root.type == bfd_link_hash_defweak
f5385ebf 2034 || !h->def_regular))))
d40d037c 2035 || (ELIMINATE_COPY_RELOCS
0e1862bb 2036 && !bfd_link_pic (info)
c434dee6
AJ
2037 && (sec->flags & SEC_ALLOC) != 0
2038 && h != NULL
2039 && (h->root.type == bfd_link_hash_defweak
0f88be7a 2040 || !h->def_regular)))
70256ad8 2041 {
e03a8ed8
L
2042 struct elf_dyn_relocs *p;
2043 struct elf_dyn_relocs **head;
c434dee6
AJ
2044
2045 /* We must copy these reloc types into the output file.
2046 Create a reloc section in dynobj and make room for
2047 this reloc. */
70256ad8
AJ
2048 if (sreloc == NULL)
2049 {
c434dee6
AJ
2050 if (htab->elf.dynobj == NULL)
2051 htab->elf.dynobj = abfd;
2052
83bac4b0 2053 sreloc = _bfd_elf_make_dynamic_reloc_section
82e96e07
L
2054 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2055 abfd, /*rela?*/ TRUE);
70256ad8 2056
70256ad8 2057 if (sreloc == NULL)
c2e61a4e 2058 return FALSE;
70256ad8
AJ
2059 }
2060
c434dee6
AJ
2061 /* If this is a global symbol, we count the number of
2062 relocations we need for this symbol. */
2063 if (h != NULL)
70256ad8 2064 {
351f65ca 2065 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
c434dee6
AJ
2066 }
2067 else
2068 {
2069 /* Track dynamic relocs needed for local syms too.
2070 We really need local syms available to do this
2071 easily. Oh well. */
c434dee6 2072 asection *s;
87d72d41 2073 void **vpp;
87d72d41
AM
2074
2075 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2076 abfd, r_symndx);
2077 if (isym == NULL)
2078 return FALSE;
2079
2080 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
c434dee6 2081 if (s == NULL)
87d72d41 2082 s = sec;
70256ad8 2083
e81d3500
DD
2084 /* Beware of type punned pointers vs strict aliasing
2085 rules. */
2086 vpp = &(elf_section_data (s)->local_dynrel);
e03a8ed8 2087 head = (struct elf_dyn_relocs **)vpp;
c434dee6 2088 }
70256ad8 2089
c434dee6
AJ
2090 p = *head;
2091 if (p == NULL || p->sec != sec)
2092 {
2093 bfd_size_type amt = sizeof *p;
d8045f23 2094
e03a8ed8 2095 p = ((struct elf_dyn_relocs *)
c434dee6 2096 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 2097 if (p == NULL)
c2e61a4e 2098 return FALSE;
c434dee6
AJ
2099 p->next = *head;
2100 *head = p;
2101 p->sec = sec;
2102 p->count = 0;
2103 p->pc_count = 0;
70256ad8 2104 }
c434dee6
AJ
2105
2106 p->count += 1;
06a6a421
L
2107 /* Count size relocation as PC-relative relocation. */
2108 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
c434dee6 2109 p->pc_count += 1;
70256ad8
AJ
2110 }
2111 break;
fe4770f4
AJ
2112
2113 /* This relocation describes the C++ object vtable hierarchy.
2114 Reconstruct it for later use during GC. */
2115 case R_X86_64_GNU_VTINHERIT:
c152c796 2116 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 2117 return FALSE;
fe4770f4
AJ
2118 break;
2119
2120 /* This relocation describes which C++ vtable entries are actually
2121 used. Record for later use during GC. */
2122 case R_X86_64_GNU_VTENTRY:
d17e0c6e
JB
2123 BFD_ASSERT (h != NULL);
2124 if (h != NULL
2125 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
c2e61a4e 2126 return FALSE;
fe4770f4 2127 break;
c434dee6
AJ
2128
2129 default:
2130 break;
70256ad8 2131 }
dd7e64d4
L
2132
2133 if (use_plt_got
2134 && h != NULL
2135 && h->plt.refcount > 0
8ded2ddc
L
2136 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2137 || h->got.refcount > 0)
dd7e64d4
L
2138 && htab->plt_got == NULL)
2139 {
2140 /* Create the GOT procedure linkage table. */
2141 unsigned int plt_got_align;
2142 const struct elf_backend_data *bed;
2143
2144 bed = get_elf_backend_data (info->output_bfd);
2145 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8
2146 && (sizeof (elf_x86_64_bnd_plt2_entry)
2147 == sizeof (elf_x86_64_legacy_plt2_entry)));
2148 plt_got_align = 3;
2149
2150 if (htab->elf.dynobj == NULL)
2151 htab->elf.dynobj = abfd;
2152 htab->plt_got
2153 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2154 ".plt.got",
2155 (bed->dynamic_sec_flags
2156 | SEC_ALLOC
2157 | SEC_CODE
2158 | SEC_LOAD
2159 | SEC_READONLY));
2160 if (htab->plt_got == NULL
2161 || !bfd_set_section_alignment (htab->elf.dynobj,
2162 htab->plt_got,
2163 plt_got_align))
2164 return FALSE;
2165 }
c1d11331 2166
56ceb5b5
L
2167 if ((r_type == R_X86_64_GOTPCREL
2168 || r_type == R_X86_64_GOTPCRELX
2169 || r_type == R_X86_64_REX_GOTPCRELX)
c1d11331 2170 && (h == NULL || h->type != STT_GNU_IFUNC))
56ceb5b5 2171 sec->need_convert_load = 1;
70256ad8
AJ
2172 }
2173
b34976b6 2174 return TRUE;
70256ad8
AJ
2175}
2176
2177/* Return the section that should be marked against GC for a given
407443a3 2178 relocation. */
70256ad8
AJ
2179
2180static asection *
351f65ca
L
2181elf_x86_64_gc_mark_hook (asection *sec,
2182 struct bfd_link_info *info,
2183 Elf_Internal_Rela *rel,
2184 struct elf_link_hash_entry *h,
2185 Elf_Internal_Sym *sym)
70256ad8
AJ
2186{
2187 if (h != NULL)
351f65ca 2188 switch (ELF32_R_TYPE (rel->r_info))
07adf181
AM
2189 {
2190 case R_X86_64_GNU_VTINHERIT:
2191 case R_X86_64_GNU_VTENTRY:
2192 return NULL;
2193 }
2194
2195 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
70256ad8
AJ
2196}
2197
407443a3 2198/* Update the got entry reference counts for the section being removed. */
70256ad8 2199
b34976b6 2200static bfd_boolean
351f65ca
L
2201elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
2202 asection *sec,
2203 const Elf_Internal_Rela *relocs)
70256ad8 2204{
351f65ca 2205 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ
2206 Elf_Internal_Shdr *symtab_hdr;
2207 struct elf_link_hash_entry **sym_hashes;
2208 bfd_signed_vma *local_got_refcounts;
2209 const Elf_Internal_Rela *rel, *relend;
c434dee6 2210
0e1862bb 2211 if (bfd_link_relocatable (info))
7dda2462
TG
2212 return TRUE;
2213
351f65ca 2214 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
2215 if (htab == NULL)
2216 return FALSE;
2217
c434dee6 2218 elf_section_data (sec)->local_dynrel = NULL;
70256ad8 2219
0ffa91dd 2220 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8
AJ
2221 sym_hashes = elf_sym_hashes (abfd);
2222 local_got_refcounts = elf_local_got_refcounts (abfd);
2223
351f65ca 2224 htab = elf_x86_64_hash_table (info);
70256ad8
AJ
2225 relend = relocs + sec->reloc_count;
2226 for (rel = relocs; rel < relend; rel++)
26e41594
AM
2227 {
2228 unsigned long r_symndx;
2229 unsigned int r_type;
2230 struct elf_link_hash_entry *h = NULL;
04ebc307 2231 bfd_boolean pointer_reloc;
70256ad8 2232
351f65ca 2233 r_symndx = htab->r_sym (rel->r_info);
26e41594
AM
2234 if (r_symndx >= symtab_hdr->sh_info)
2235 {
26e41594 2236 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM
2237 while (h->root.type == bfd_link_hash_indirect
2238 || h->root.type == bfd_link_hash_warning)
2239 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 2240 }
bb1cb422
L
2241 else
2242 {
2243 /* A local symbol. */
2244 Elf_Internal_Sym *isym;
2245
2246 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2247 abfd, r_symndx);
2248
2249 /* Check relocation against local STT_GNU_IFUNC symbol. */
2250 if (isym != NULL
82e96e07 2251 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
bb1cb422 2252 {
351f65ca 2253 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
bb1cb422
L
2254 if (h == NULL)
2255 abort ();
2256 }
2257 }
c434dee6 2258
3db2e7dd
L
2259 if (h)
2260 {
2261 struct elf_x86_64_link_hash_entry *eh;
2262 struct elf_dyn_relocs **pp;
2263 struct elf_dyn_relocs *p;
2264
2265 eh = (struct elf_x86_64_link_hash_entry *) h;
2266
2267 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2268 if (p->sec == sec)
2269 {
2270 /* Everything must go for SEC. */
2271 *pp = p->next;
2272 break;
2273 }
2274 }
2275
351f65ca
L
2276 r_type = ELF32_R_TYPE (rel->r_info);
2277 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
2278 symtab_hdr, sym_hashes,
2279 &r_type, GOT_UNKNOWN,
2280 rel, relend, h, r_symndx))
142411ca
L
2281 return FALSE;
2282
04ebc307 2283 pointer_reloc = FALSE;
26e41594
AM
2284 switch (r_type)
2285 {
2286 case R_X86_64_TLSLD:
4dfe6ac6
NC
2287 if (htab->tls_ld_got.refcount > 0)
2288 htab->tls_ld_got.refcount -= 1;
26e41594 2289 break;
c434dee6 2290
26e41594 2291 case R_X86_64_TLSGD:
67a4f2b7
AO
2292 case R_X86_64_GOTPC32_TLSDESC:
2293 case R_X86_64_TLSDESC_CALL:
26e41594
AM
2294 case R_X86_64_GOTTPOFF:
2295 case R_X86_64_GOT32:
2296 case R_X86_64_GOTPCREL:
56ceb5b5
L
2297 case R_X86_64_GOTPCRELX:
2298 case R_X86_64_REX_GOTPCRELX:
7b81dfbb
AJ
2299 case R_X86_64_GOT64:
2300 case R_X86_64_GOTPCREL64:
2301 case R_X86_64_GOTPLT64:
26e41594
AM
2302 if (h != NULL)
2303 {
2304 if (h->got.refcount > 0)
2305 h->got.refcount -= 1;
bb1cb422
L
2306 if (h->type == STT_GNU_IFUNC)
2307 {
2308 if (h->plt.refcount > 0)
2309 h->plt.refcount -= 1;
2310 }
26e41594
AM
2311 }
2312 else if (local_got_refcounts != NULL)
2313 {
2314 if (local_got_refcounts[r_symndx] > 0)
2315 local_got_refcounts[r_symndx] -= 1;
2316 }
2317 break;
c434dee6 2318
26e41594 2319 case R_X86_64_32:
26e41594 2320 case R_X86_64_32S:
04ebc307
L
2321 pointer_reloc = !ABI_64_P (abfd);
2322 goto pointer;
2323
2324 case R_X86_64_64:
2325 pointer_reloc = TRUE;
2326 case R_X86_64_8:
2327 case R_X86_64_16:
26e41594
AM
2328 case R_X86_64_PC8:
2329 case R_X86_64_PC16:
2330 case R_X86_64_PC32:
c3320543 2331 case R_X86_64_PC32_BND:
d6ab8113 2332 case R_X86_64_PC64:
1788fc08
L
2333 case R_X86_64_SIZE32:
2334 case R_X86_64_SIZE64:
04ebc307 2335pointer:
0e1862bb 2336 if (bfd_link_pic (info)
3db2e7dd 2337 && (h == NULL || h->type != STT_GNU_IFUNC))
26e41594
AM
2338 break;
2339 /* Fall thru */
c434dee6 2340
26e41594 2341 case R_X86_64_PLT32:
c3320543 2342 case R_X86_64_PLT32_BND:
7b81dfbb 2343 case R_X86_64_PLTOFF64:
26e41594
AM
2344 if (h != NULL)
2345 {
2346 if (h->plt.refcount > 0)
2347 h->plt.refcount -= 1;
04ebc307
L
2348 if (pointer_reloc && (sec->flags & SEC_READONLY) == 0)
2349 {
2350 struct elf_x86_64_link_hash_entry *eh
2351 = (struct elf_x86_64_link_hash_entry *) h;
2352 if (eh->func_pointer_refcount > 0)
2353 eh->func_pointer_refcount -= 1;
2354 }
26e41594
AM
2355 }
2356 break;
70256ad8 2357
26e41594
AM
2358 default:
2359 break;
2360 }
2361 }
70256ad8 2362
b34976b6 2363 return TRUE;
70256ad8
AJ
2364}
2365
2366/* Adjust a symbol defined by a dynamic object and referenced by a
2367 regular object. The current definition is in some section of the
2368 dynamic object, but we're not including those sections. We have to
2369 change the definition to something the rest of the link can
407443a3 2370 understand. */
70256ad8 2371
b34976b6 2372static bfd_boolean
351f65ca
L
2373elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2374 struct elf_link_hash_entry *h)
70256ad8 2375{
351f65ca 2376 struct elf_x86_64_link_hash_table *htab;
70256ad8 2377 asection *s;
5ca5bb35
L
2378 struct elf_x86_64_link_hash_entry *eh;
2379 struct elf_dyn_relocs *p;
70256ad8 2380
cbe950e9
L
2381 /* STT_GNU_IFUNC symbol must go through PLT. */
2382 if (h->type == STT_GNU_IFUNC)
2383 {
73bcf233
L
2384 /* All local STT_GNU_IFUNC references must be treate as local
2385 calls via local PLT. */
5ca5bb35
L
2386 if (h->ref_regular
2387 && SYMBOL_CALLS_LOCAL (info, h))
2388 {
73bcf233 2389 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L
2390 struct elf_dyn_relocs **pp;
2391
2392 eh = (struct elf_x86_64_link_hash_entry *) h;
2393 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2394 {
2395 pc_count += p->pc_count;
2396 p->count -= p->pc_count;
2397 p->pc_count = 0;
73bcf233 2398 count += p->count;
5ca5bb35
L
2399 if (p->count == 0)
2400 *pp = p->next;
2401 else
2402 pp = &p->next;
2403 }
2404
73bcf233 2405 if (pc_count || count)
5ca5bb35
L
2406 {
2407 h->needs_plt = 1;
5ca5bb35 2408 h->non_got_ref = 1;
a5479e5f
L
2409 if (h->plt.refcount <= 0)
2410 h->plt.refcount = 1;
2411 else
2412 h->plt.refcount += 1;
5ca5bb35
L
2413 }
2414 }
2415
cbe950e9
L
2416 if (h->plt.refcount <= 0)
2417 {
2418 h->plt.offset = (bfd_vma) -1;
2419 h->needs_plt = 0;
2420 }
2421 return TRUE;
2422 }
2423
70256ad8
AJ
2424 /* If this is a function, put it in the procedure linkage table. We
2425 will fill in the contents of the procedure linkage table later,
2426 when we know the address of the .got section. */
2427 if (h->type == STT_FUNC
f5385ebf 2428 || h->needs_plt)
70256ad8 2429 {
c434dee6 2430 if (h->plt.refcount <= 0
27482721
AJ
2431 || SYMBOL_CALLS_LOCAL (info, h)
2432 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2433 && h->root.type == bfd_link_hash_undefweak))
70256ad8 2434 {
70256ad8
AJ
2435 /* This case can occur if we saw a PLT32 reloc in an input
2436 file, but the symbol was never referred to by a dynamic
2437 object, or if all references were garbage collected. In
2438 such a case, we don't actually need to build a procedure
2439 linkage table, and we can just do a PC32 reloc instead. */
70256ad8 2440 h->plt.offset = (bfd_vma) -1;
f5385ebf 2441 h->needs_plt = 0;
70256ad8
AJ
2442 }
2443
b34976b6 2444 return TRUE;
70256ad8 2445 }
bbd7ec4a 2446 else
c434dee6
AJ
2447 /* It's possible that we incorrectly decided a .plt reloc was
2448 needed for an R_X86_64_PC32 reloc to a non-function sym in
2449 check_relocs. We can't decide accurately between function and
2450 non-function syms in check-relocs; Objects loaded later in
2451 the link may change h->type. So fix it now. */
bbd7ec4a 2452 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ
2453
2454 /* If this is a weak symbol, and there is a real definition, the
2455 processor independent code will have arranged for us to see the
407443a3 2456 real definition first, and we can just use the same value. */
f6e332e6 2457 if (h->u.weakdef != NULL)
70256ad8 2458 {
f6e332e6
AM
2459 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2460 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2461 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2462 h->root.u.def.value = h->u.weakdef->root.u.def.value;
d40d037c 2463 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
bc696fd5
L
2464 {
2465 eh = (struct elf_x86_64_link_hash_entry *) h;
2466 h->non_got_ref = h->u.weakdef->non_got_ref;
2467 eh->needs_copy = h->u.weakdef->needs_copy;
2468 }
b34976b6 2469 return TRUE;
70256ad8
AJ
2470 }
2471
2472 /* This is a reference to a symbol defined by a dynamic object which
407443a3 2473 is not a function. */
70256ad8
AJ
2474
2475 /* If we are creating a shared library, we must presume that the
2476 only references to the symbol are via the global offset table.
2477 For such cases we need not do anything here; the relocations will
407443a3 2478 be handled correctly by relocate_section. */
0e1862bb 2479 if (!bfd_link_executable (info))
b34976b6 2480 return TRUE;
70256ad8
AJ
2481
2482 /* If there are no references to this symbol that do not use the
2483 GOT, we don't need to generate a copy reloc. */
f5385ebf 2484 if (!h->non_got_ref)
b34976b6 2485 return TRUE;
70256ad8 2486
c434dee6
AJ
2487 /* If -z nocopyreloc was given, we won't generate them either. */
2488 if (info->nocopyreloc)
2489 {
f5385ebf 2490 h->non_got_ref = 0;
b34976b6 2491 return TRUE;
c434dee6
AJ
2492 }
2493
31c0ebfe 2494 if (ELIMINATE_COPY_RELOCS)
c434dee6 2495 {
351f65ca 2496 eh = (struct elf_x86_64_link_hash_entry *) h;
d40d037c
AJ
2497 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2498 {
2499 s = p->sec->output_section;
2500 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2501 break;
2502 }
2503
2504 /* If we didn't find any dynamic relocs in read-only sections, then
2505 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2506 if (p == NULL)
2507 {
f5385ebf 2508 h->non_got_ref = 0;
d40d037c
AJ
2509 return TRUE;
2510 }
c434dee6
AJ
2511 }
2512
70256ad8 2513 /* We must allocate the symbol in our .dynbss section, which will
407443a3 2514 become part of the .bss section of the executable. There will be
70256ad8
AJ
2515 an entry for this symbol in the .dynsym section. The dynamic
2516 object will contain position independent code, so all references
2517 from the dynamic object to this symbol will go through the global
2518 offset table. The dynamic linker will use the .dynsym entry to
2519 determine the address it must put in the global offset table, so
2520 both the dynamic object and the regular object will refer to the
2521 same memory location for the variable. */
2522
351f65ca 2523 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
2524 if (htab == NULL)
2525 return FALSE;
70256ad8
AJ
2526
2527 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2528 to copy the initial value out of the dynamic object and into the
cedb70c5 2529 runtime process image. */
1d7e9d18 2530 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
70256ad8 2531 {
351f65ca
L
2532 const struct elf_backend_data *bed;
2533 bed = get_elf_backend_data (info->output_bfd);
2534 htab->srelbss->size += bed->s->sizeof_rela;
f5385ebf 2535 h->needs_copy = 1;
70256ad8
AJ
2536 }
2537
c434dee6 2538 s = htab->sdynbss;
70256ad8 2539
6cabe1ea 2540 return _bfd_elf_adjust_dynamic_copy (info, h, s);
70256ad8
AJ
2541}
2542
c434dee6
AJ
2543/* Allocate space in .plt, .got and associated reloc sections for
2544 dynamic relocs. */
2545
b34976b6 2546static bfd_boolean
351f65ca 2547elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ
2548{
2549 struct bfd_link_info *info;
351f65ca
L
2550 struct elf_x86_64_link_hash_table *htab;
2551 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2552 struct elf_dyn_relocs *p;
351f65ca 2553 const struct elf_backend_data *bed;
eed180f8 2554 unsigned int plt_entry_size;
c434dee6 2555
e92d460e 2556 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2557 return TRUE;
c434dee6 2558
351f65ca 2559 eh = (struct elf_x86_64_link_hash_entry *) h;
e92d460e 2560
c434dee6 2561 info = (struct bfd_link_info *) inf;
351f65ca 2562 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
2563 if (htab == NULL)
2564 return FALSE;
351f65ca 2565 bed = get_elf_backend_data (info->output_bfd);
eed180f8 2566 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
c434dee6 2567
dd7e64d4
L
2568 /* We can't use the GOT PLT if pointer equality is needed since
2569 finish_dynamic_symbol won't clear symbol value and the dynamic
2570 linker won't update the GOT slot. We will get into an infinite
2571 loop at run-time. */
2572 if (htab->plt_got != NULL
2573 && h->type != STT_GNU_IFUNC
2574 && !h->pointer_equality_needed
2575 && h->plt.refcount > 0
2576 && h->got.refcount > 0)
2577 {
2578 /* Don't use the regular PLT if there are both GOT and GOTPLT
2579 reloctions. */
2580 h->plt.offset = (bfd_vma) -1;
2581
2582 /* Use the GOT PLT. */
2583 eh->plt_got.refcount = 1;
2584 }
2585
04ebc307
L
2586 /* Clear the reference count of function pointer relocations if
2587 symbol isn't a normal function. */
2588 if (h->type != STT_FUNC)
2589 eh->func_pointer_refcount = 0;
2590
cbe950e9
L
2591 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2592 here if it is defined and referenced in a non-shared object. */
2593 if (h->type == STT_GNU_IFUNC
2594 && h->def_regular)
0ff2b86e
L
2595 {
2596 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2597 &eh->dyn_relocs,
2598 plt_entry_size,
2599 plt_entry_size,
2600 GOT_ENTRY_SIZE))
2601 {
2602 asection *s = htab->plt_bnd;
2603 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2604 {
2605 /* Use the .plt.bnd section if it is created. */
2606 eh->plt_bnd.offset = s->size;
2607
2608 /* Make room for this entry in the .plt.bnd section. */
2609 s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2610 }
2611
2612 return TRUE;
2613 }
2614 else
2615 return FALSE;
2616 }
04ebc307
L
2617 /* Don't create the PLT entry if there are only function pointer
2618 relocations which can be resolved at run-time. */
cbe950e9 2619 else if (htab->elf.dynamic_sections_created
04ebc307
L
2620 && (h->plt.refcount > eh->func_pointer_refcount
2621 || eh->plt_got.refcount > 0))
c434dee6 2622 {
25070364
L
2623 bfd_boolean use_plt_got;
2624
04ebc307
L
2625 /* Clear the reference count of function pointer relocations
2626 if PLT is used. */
2627 eh->func_pointer_refcount = 0;
2628
8ded2ddc 2629 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
25070364
L
2630 {
2631 /* Don't use the regular PLT for DF_BIND_NOW. */
2632 h->plt.offset = (bfd_vma) -1;
2633
2634 /* Use the GOT PLT. */
2635 h->got.refcount = 1;
2636 eh->plt_got.refcount = 1;
2637 }
2638
2639 use_plt_got = eh->plt_got.refcount > 0;
dd7e64d4 2640
c434dee6
AJ
2641 /* Make sure this symbol is output as a dynamic symbol.
2642 Undefined weak syms won't yet be marked as dynamic. */
2643 if (h->dynindx == -1
f5385ebf 2644 && !h->forced_local)
c434dee6 2645 {
c152c796 2646 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2647 return FALSE;
c434dee6
AJ
2648 }
2649
0e1862bb 2650 if (bfd_link_pic (info)
27482721 2651 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6 2652 {
6de2ae4a 2653 asection *s = htab->elf.splt;
0ff2b86e 2654 asection *bnd_s = htab->plt_bnd;
dd7e64d4 2655 asection *got_s = htab->plt_got;
c434dee6 2656
7c1e8d3e
L
2657 /* If this is the first .plt entry, make room for the special
2658 first entry. The .plt section is used by prelink to undo
2659 prelinking for dynamic relocations. */
2660 if (s->size == 0)
2661 s->size = plt_entry_size;
2662
dd7e64d4
L
2663 if (use_plt_got)
2664 eh->plt_got.offset = got_s->size;
2665 else
2666 {
2667 h->plt.offset = s->size;
2668 if (bnd_s)
2669 eh->plt_bnd.offset = bnd_s->size;
2670 }
c434dee6
AJ
2671
2672 /* If this symbol is not defined in a regular file, and we are
2673 not generating a shared library, then set the symbol to this
2674 location in the .plt. This is required to make function
2675 pointers compare as equal between the normal executable and
2676 the shared library. */
0e1862bb 2677 if (! bfd_link_pic (info)
f5385ebf 2678 && !h->def_regular)
c434dee6 2679 {
dd7e64d4 2680 if (use_plt_got)
0ff2b86e 2681 {
dd7e64d4
L
2682 /* We need to make a call to the entry of the GOT PLT
2683 instead of regular PLT entry. */
2684 h->root.u.def.section = got_s;
2685 h->root.u.def.value = eh->plt_got.offset;
0ff2b86e
L
2686 }
2687 else
2688 {
dd7e64d4
L
2689 if (bnd_s)
2690 {
2691 /* We need to make a call to the entry of the second
2692 PLT instead of regular PLT entry. */
2693 h->root.u.def.section = bnd_s;
2694 h->root.u.def.value = eh->plt_bnd.offset;
2695 }
2696 else
2697 {
2698 h->root.u.def.section = s;
2699 h->root.u.def.value = h->plt.offset;
2700 }
0ff2b86e 2701 }
c434dee6
AJ
2702 }
2703
2704 /* Make room for this entry. */
dd7e64d4
L
2705 if (use_plt_got)
2706 got_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2707 else
2708 {
2709 s->size += plt_entry_size;
2710 if (bnd_s)
2711 bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
c434dee6 2712
dd7e64d4
L
2713 /* We also need to make an entry in the .got.plt section,
2714 which will be placed in the .got section by the linker
2715 script. */
2716 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
c434dee6 2717
dd7e64d4
L
2718 /* We also need to make an entry in the .rela.plt
2719 section. */
2720 htab->elf.srelplt->size += bed->s->sizeof_rela;
2721 htab->elf.srelplt->reloc_count++;
2722 }
c434dee6
AJ
2723 }
2724 else
2725 {
2726 h->plt.offset = (bfd_vma) -1;
f5385ebf 2727 h->needs_plt = 0;
c434dee6
AJ
2728 }
2729 }
2730 else
2731 {
2732 h->plt.offset = (bfd_vma) -1;
f5385ebf 2733 h->needs_plt = 0;
c434dee6
AJ
2734 }
2735
67a4f2b7
AO
2736 eh->tlsdesc_got = (bfd_vma) -1;
2737
bffbf940
JJ
2738 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2739 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2740 if (h->got.refcount > 0
0e1862bb 2741 && bfd_link_executable (info)
bffbf940 2742 && h->dynindx == -1
351f65ca 2743 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
d8045f23
NC
2744 {
2745 h->got.offset = (bfd_vma) -1;
2746 }
bffbf940 2747 else if (h->got.refcount > 0)
c434dee6
AJ
2748 {
2749 asection *s;
b34976b6 2750 bfd_boolean dyn;
351f65ca 2751 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ
2752
2753 /* Make sure this symbol is output as a dynamic symbol.
2754 Undefined weak syms won't yet be marked as dynamic. */
2755 if (h->dynindx == -1
f5385ebf 2756 && !h->forced_local)
c434dee6 2757 {
c152c796 2758 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2759 return FALSE;
c434dee6
AJ
2760 }
2761
67a4f2b7
AO
2762 if (GOT_TLS_GDESC_P (tls_type))
2763 {
6de2ae4a 2764 eh->tlsdesc_got = htab->elf.sgotplt->size
351f65ca 2765 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2766 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO
2767 h->got.offset = (bfd_vma) -2;
2768 }
2769 if (! GOT_TLS_GDESC_P (tls_type)
2770 || GOT_TLS_GD_P (tls_type))
2771 {
6de2ae4a 2772 s = htab->elf.sgot;
67a4f2b7
AO
2773 h->got.offset = s->size;
2774 s->size += GOT_ENTRY_SIZE;
2775 if (GOT_TLS_GD_P (tls_type))
2776 s->size += GOT_ENTRY_SIZE;
2777 }
c434dee6 2778 dyn = htab->elf.dynamic_sections_created;
bffbf940
JJ
2779 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2780 and two if global.
2781 R_X86_64_GOTTPOFF needs one dynamic relocation. */
67a4f2b7 2782 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
bffbf940 2783 || tls_type == GOT_TLS_IE)
351f65ca 2784 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7 2785 else if (GOT_TLS_GD_P (tls_type))
351f65ca 2786 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
67a4f2b7
AO
2787 else if (! GOT_TLS_GDESC_P (tls_type)
2788 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2789 || h->root.type != bfd_link_hash_undefweak)
0e1862bb 2790 && (bfd_link_pic (info)
27482721 2791 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
351f65ca 2792 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7
AO
2793 if (GOT_TLS_GDESC_P (tls_type))
2794 {
351f65ca 2795 htab->elf.srelplt->size += bed->s->sizeof_rela;
67a4f2b7
AO
2796 htab->tlsdesc_plt = (bfd_vma) -1;
2797 }
c434dee6
AJ
2798 }
2799 else
2800 h->got.offset = (bfd_vma) -1;
2801
c434dee6 2802 if (eh->dyn_relocs == NULL)
b34976b6 2803 return TRUE;
c434dee6
AJ
2804
2805 /* In the shared -Bsymbolic case, discard space allocated for
2806 dynamic pc-relative relocs against symbols which turn out to be
2807 defined in regular objects. For the normal shared case, discard
2808 space for pc-relative relocs that have become local due to symbol
2809 visibility changes. */
2810
0e1862bb 2811 if (bfd_link_pic (info))
c434dee6 2812 {
27482721
AJ
2813 /* Relocs that use pc_count are those that appear on a call
2814 insn, or certain REL relocs that can generated via assembly.
2815 We want calls to protected symbols to resolve directly to the
2816 function rather than going via the plt. If people want
2817 function pointer comparisons to work as expected then they
2818 should avoid writing weird assembly. */
2819 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6 2820 {
e03a8ed8 2821 struct elf_dyn_relocs **pp;
c434dee6
AJ
2822
2823 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2824 {
c3ce498c
L
2825 p->count -= p->pc_count;
2826 p->pc_count = 0;
c434dee6
AJ
2827 if (p->count == 0)
2828 *pp = p->next;
2829 else
2830 pp = &p->next;
2831 }
2832 }
4e795f50
AM
2833
2834 /* Also discard relocs on undefined weak syms with non-default
c353e543 2835 visibility. */
31c0ebfe 2836 if (eh->dyn_relocs != NULL)
22d606e9 2837 {
31c0ebfe
L
2838 if (h->root.type == bfd_link_hash_undefweak)
2839 {
2840 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2841 eh->dyn_relocs = NULL;
2842
2843 /* Make sure undefined weak symbols are output as a dynamic
2844 symbol in PIEs. */
2845 else if (h->dynindx == -1
2846 && ! h->forced_local
2847 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2848 return FALSE;
2849 }
9d1d54d5
L
2850 /* For PIE, discard space for pc-relative relocs against
2851 symbols which turn out to need copy relocs. */
0e1862bb 2852 else if (bfd_link_executable (info)
bc696fd5 2853 && (h->needs_copy || eh->needs_copy)
31c0ebfe
L
2854 && h->def_dynamic
2855 && !h->def_regular)
9d1d54d5
L
2856 {
2857 struct elf_dyn_relocs **pp;
2858
2859 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2860 {
2861 if (p->pc_count != 0)
2862 *pp = p->next;
2863 else
2864 pp = &p->next;
2865 }
2866 }
22d606e9 2867 }
d8045f23 2868 }
d40d037c 2869 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ
2870 {
2871 /* For the non-shared case, discard space for relocs against
2872 symbols which turn out to need copy relocs or are not
04ebc307
L
2873 dynamic. Keep dynamic relocations for run-time function
2874 pointer initialization. */
c434dee6 2875
04ebc307 2876 if ((!h->non_got_ref || eh->func_pointer_refcount > 0)
f5385ebf
AM
2877 && ((h->def_dynamic
2878 && !h->def_regular)
c434dee6
AJ
2879 || (htab->elf.dynamic_sections_created
2880 && (h->root.type == bfd_link_hash_undefweak
2881 || h->root.type == bfd_link_hash_undefined))))
2882 {
2883 /* Make sure this symbol is output as a dynamic symbol.
2884 Undefined weak syms won't yet be marked as dynamic. */
2885 if (h->dynindx == -1
d8045f23
NC
2886 && ! h->forced_local
2887 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2888 return FALSE;
c434dee6
AJ
2889
2890 /* If that succeeded, we know we'll be keeping all the
2891 relocs. */
2892 if (h->dynindx != -1)
2893 goto keep;
2894 }
2895
2896 eh->dyn_relocs = NULL;
04ebc307 2897 eh->func_pointer_refcount = 0;
c434dee6
AJ
2898
2899 keep: ;
2900 }
2901
2902 /* Finally, allocate space. */
2903 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2904 {
e7c33416
NC
2905 asection * sreloc;
2906
cbe950e9 2907 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC
2908
2909 BFD_ASSERT (sreloc != NULL);
2910
351f65ca 2911 sreloc->size += p->count * bed->s->sizeof_rela;
c434dee6
AJ
2912 }
2913
b34976b6 2914 return TRUE;
c434dee6
AJ
2915}
2916
c25bc9fc
L
2917/* Allocate space in .plt, .got and associated reloc sections for
2918 local dynamic relocs. */
2919
2920static bfd_boolean
351f65ca 2921elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
c25bc9fc
L
2922{
2923 struct elf_link_hash_entry *h
2924 = (struct elf_link_hash_entry *) *slot;
2925
2926 if (h->type != STT_GNU_IFUNC
2927 || !h->def_regular
2928 || !h->ref_regular
2929 || !h->forced_local
2930 || h->root.type != bfd_link_hash_defined)
2931 abort ();
2932
351f65ca 2933 return elf_x86_64_allocate_dynrelocs (h, inf);
c25bc9fc
L
2934}
2935
c434dee6
AJ
2936/* Find any dynamic relocs that apply to read-only sections. */
2937
b34976b6 2938static bfd_boolean
351f65ca
L
2939elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2940 void * inf)
c434dee6 2941{
351f65ca 2942 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2943 struct elf_dyn_relocs *p;
c434dee6 2944
aa715242
L
2945 /* Skip local IFUNC symbols. */
2946 if (h->forced_local && h->type == STT_GNU_IFUNC)
2947 return TRUE;
2948
351f65ca 2949 eh = (struct elf_x86_64_link_hash_entry *) h;
c434dee6
AJ
2950 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2951 {
2952 asection *s = p->sec->output_section;
2953
2954 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2955 {
2956 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2957
2958 info->flags |= DF_TEXTREL;
2959
0e1862bb 2960 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd
L
2961 || info->error_textrel)
2962 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
b70321a2
L
2963 p->sec->owner, h->root.root.string,
2964 p->sec);
2965
c434dee6 2966 /* Not an error, just cut short the traversal. */
b34976b6 2967 return FALSE;
c434dee6
AJ
2968 }
2969 }
b34976b6 2970 return TRUE;
c434dee6
AJ
2971}
2972
56ceb5b5 2973/* With the local symbol, foo, we convert
daa67607
L
2974 mov foo@GOTPCREL(%rip), %reg
2975 to
2976 lea foo(%rip), %reg
56ceb5b5
L
2977 and convert
2978 call/jmp *foo@GOTPCREL(%rip)
2979 to
2980 nop call foo/jmp foo nop
2981 When PIC is false, convert
2982 test %reg, foo@GOTPCREL(%rip)
2983 to
2984 test $foo, %reg
2985 and convert
2986 binop foo@GOTPCREL(%rip), %reg
2987 to
2988 binop $foo, %reg
2989 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
2990 instructions. */
daa67607
L
2991
2992static bfd_boolean
56ceb5b5
L
2993elf_x86_64_convert_load (bfd *abfd, asection *sec,
2994 struct bfd_link_info *link_info)
daa67607
L
2995{
2996 Elf_Internal_Shdr *symtab_hdr;
2997 Elf_Internal_Rela *internal_relocs;
2998 Elf_Internal_Rela *irel, *irelend;
2999 bfd_byte *contents;
3000 struct elf_x86_64_link_hash_table *htab;
3001 bfd_boolean changed_contents;
3002 bfd_boolean changed_relocs;
3003 bfd_signed_vma *local_got_refcounts;
59cab532 3004 bfd_vma maxpagesize;
daa67607
L
3005
3006 /* Don't even try to convert non-ELF outputs. */
3007 if (!is_elf_hash_table (link_info->hash))
3008 return FALSE;
3009
c1d11331 3010 /* Nothing to do if there is no need or no output. */
daa67607 3011 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
56ceb5b5 3012 || sec->need_convert_load == 0
c8831961 3013 || bfd_is_abs_section (sec->output_section))
daa67607
L
3014 return TRUE;
3015
3016 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3017
3018 /* Load the relocations for this section. */
3019 internal_relocs = (_bfd_elf_link_read_relocs
3020 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3021 link_info->keep_memory));
3022 if (internal_relocs == NULL)
3023 return FALSE;
3024
3025 htab = elf_x86_64_hash_table (link_info);
3026 changed_contents = FALSE;
3027 changed_relocs = FALSE;
3028 local_got_refcounts = elf_local_got_refcounts (abfd);
59cab532 3029 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
daa67607
L
3030
3031 /* Get the section contents. */
3032 if (elf_section_data (sec)->this_hdr.contents != NULL)
3033 contents = elf_section_data (sec)->this_hdr.contents;
3034 else
3035 {
3036 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3037 goto error_return;
3038 }
3039
3040 irelend = internal_relocs + sec->reloc_count;
3041 for (irel = internal_relocs; irel < irelend; irel++)
3042 {
3043 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3044 unsigned int r_symndx = htab->r_sym (irel->r_info);
3045 unsigned int indx;
3046 struct elf_link_hash_entry *h;
59cab532
L
3047 asection *tsec;
3048 char symtype;
3049 bfd_vma toff, roff;
56ceb5b5 3050 bfd_signed_vma raddend;
dfc87947 3051 unsigned int opcode;
56ceb5b5 3052 unsigned int modrm;
daa67607 3053
56ceb5b5
L
3054 if (r_type != R_X86_64_GOTPCREL
3055 && r_type != R_X86_64_GOTPCRELX
3056 && r_type != R_X86_64_REX_GOTPCRELX)
daa67607
L
3057 continue;
3058
59cab532 3059 roff = irel->r_offset;
56ceb5b5
L
3060 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
3061 continue;
59cab532 3062
56ceb5b5
L
3063 raddend = irel->r_addend;
3064 /* Addend for 32-bit PC-relative relocation must be -4. */
3065 if (raddend != -4)
dfc87947
L
3066 continue;
3067
3068 opcode = bfd_get_8 (abfd, contents + roff - 2);
3069
56ceb5b5 3070 /* It is OK to convert mov to lea. */
dfc87947 3071 if (opcode != 0x8b)
56ceb5b5
L
3072 {
3073 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
3074 for mov call, jmp or one of adc, add, and, cmp, or, sbb,
3075 sub, test, xor instructions. */
3076 if (r_type != R_X86_64_GOTPCRELX
3077 && r_type != R_X86_64_REX_GOTPCRELX)
3078 continue;
3079
3080 /* It is OK to convert indirect branch to direct branch. */
3081 if (opcode != 0xff)
3082 {
3083 /* It is OK to convert adc, add, and, cmp, or, sbb, sub,
3084 test, xor only when PIC is false. */
3085 if (bfd_link_pic (link_info))
3086 continue;
3087 }
3088 }
59cab532 3089
daa67607
L
3090 /* Get the symbol referred to by the reloc. */
3091 if (r_symndx < symtab_hdr->sh_info)
3092 {
3093 Elf_Internal_Sym *isym;
3094
3095 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3096 abfd, r_symndx);
3097
59cab532
L
3098 symtype = ELF_ST_TYPE (isym->st_info);
3099
56ceb5b5
L
3100 /* STT_GNU_IFUNC must keep GOTPCREL relocations and skip
3101 relocation against undefined symbols. */
77697d41
L
3102 if (symtype == STT_GNU_IFUNC || isym->st_shndx == SHN_UNDEF)
3103 continue;
59cab532 3104
77697d41
L
3105 if (isym->st_shndx == SHN_ABS)
3106 tsec = bfd_abs_section_ptr;
3107 else if (isym->st_shndx == SHN_COMMON)
3108 tsec = bfd_com_section_ptr;
3109 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
3110 tsec = &_bfd_elf_large_com_section;
3111 else
3112 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3113
3114 h = NULL;
3115 toff = isym->st_value;
59cab532
L
3116 }
3117 else
3118 {
3119 indx = r_symndx - symtab_hdr->sh_info;
3120 h = elf_sym_hashes (abfd)[indx];
3121 BFD_ASSERT (h != NULL);
3122
3123 while (h->root.type == bfd_link_hash_indirect
3124 || h->root.type == bfd_link_hash_warning)
3125 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3126
56ceb5b5
L
3127 /* STT_GNU_IFUNC must keep GOTPCREL relocations. We also
3128 avoid optimizing GOTPCREL relocations againt _DYNAMIC
3129 since ld.so may use its link-time address. */
ead3d542
L
3130 if ((h->def_regular
3131 || h->root.type == bfd_link_hash_defined
3132 || h->root.type == bfd_link_hash_defweak)
75a06c79 3133 && h->type != STT_GNU_IFUNC
59cab532
L
3134 && h != htab->elf.hdynamic
3135 && SYMBOL_REFERENCES_LOCAL (link_info, h))
7b7e7f1d 3136 {
ead3d542
L
3137 /* bfd_link_hash_new or bfd_link_hash_undefined is
3138 set by an assignment in a linker script in
3139 bfd_elf_record_link_assignment. FIXME: If we
3140 ever get a linker error due relocation overflow,
3141 we will skip this optimization. */
3142 if (h->def_regular
3143 && (h->root.type == bfd_link_hash_new
3144 || h->root.type == bfd_link_hash_undefined))
7b7e7f1d
L
3145 goto convert;
3146 tsec = h->root.u.def.section;
3147 toff = h->root.u.def.value;
3148 symtype = h->type;
3149 }
77697d41
L
3150 else
3151 continue;
59cab532
L
3152 }
3153
59cab532
L
3154 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
3155 {
3156 /* At this stage in linking, no SEC_MERGE symbol has been
3157 adjusted, so all references to such symbols need to be
3158 passed through _bfd_merged_section_offset. (Later, in
3159 relocate_section, all SEC_MERGE symbols *except* for
3160 section symbols have been adjusted.)
3161
3162 gas may reduce relocations against symbols in SEC_MERGE
3163 sections to a relocation against the section symbol when
3164 the original addend was zero. When the reloc is against
3165 a section symbol we should include the addend in the
3166 offset passed to _bfd_merged_section_offset, since the
3167 location of interest is the original symbol. On the
3168 other hand, an access to "sym+addend" where "sym" is not
3169 a section symbol should not include the addend; Such an
3170 access is presumed to be an offset from "sym"; The
3171 location of interest is just "sym". */
3172 if (symtype == STT_SECTION)
56ceb5b5 3173 toff += raddend;
59cab532
L
3174
3175 toff = _bfd_merged_section_offset (abfd, &tsec,
3176 elf_section_data (tsec)->sec_info,
3177 toff);
3178
3179 if (symtype != STT_SECTION)
56ceb5b5 3180 toff += raddend;
59cab532
L
3181 }
3182 else
56ceb5b5 3183 toff += raddend;
59cab532
L
3184
3185 /* Don't convert if R_X86_64_PC32 relocation overflows. */
3186 if (tsec->output_section == sec->output_section)
3187 {
3188 if ((toff - roff + 0x80000000) > 0xffffffff)
3189 continue;
3190 }
3191 else
3192 {
4a539596 3193 bfd_signed_vma distance;
59cab532
L
3194
3195 /* At this point, we don't know the load addresses of TSEC
3196 section nor SEC section. We estimate the distrance between
fb06f1c0 3197 SEC and TSEC. We store the estimated distances in the
4a539596
L
3198 compressed_size field of the output section, which is only
3199 used to decompress the compressed input section. */
3200 if (sec->output_section->compressed_size == 0)
59cab532 3201 {
4a539596
L
3202 asection *asect;
3203 bfd_size_type size = 0;
3204 for (asect = link_info->output_bfd->sections;
3205 asect != NULL;
3206 asect = asect->next)
59cab532 3207 {
4a539596
L
3208 asection *i;
3209 for (i = asect->map_head.s;
3210 i != NULL;
3211 i = i->map_head.s)
3212 {
3213 size = align_power (size, i->alignment_power);
3214 size += i->size;
3215 }
3216 asect->compressed_size = size;
59cab532 3217 }
daa67607 3218 }
59cab532 3219
56ceb5b5
L
3220 /* Don't convert GOTPCREL relocations if TSEC isn't placed
3221 after SEC. */
4a539596
L
3222 distance = (tsec->output_section->compressed_size
3223 - sec->output_section->compressed_size);
3224 if (distance < 0)
59cab532
L
3225 continue;
3226
3227 /* Take PT_GNU_RELRO segment into account by adding
3228 maxpagesize. */
4a539596 3229 if ((toff + distance + maxpagesize - roff + 0x80000000)
59cab532
L
3230 > 0xffffffff)
3231 continue;
daa67607
L
3232 }
3233
7b7e7f1d 3234convert:
56ceb5b5
L
3235 if (opcode == 0xff)
3236 {
3237 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
3238 unsigned int nop;
caa65211 3239 unsigned int disp;
56ceb5b5
L
3240 bfd_vma nop_offset;
3241
3242 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
3243 R_X86_64_PC32. */
3244 modrm = bfd_get_8 (abfd, contents + roff - 1);
3245 if (modrm == 0x25)
3246 {
56ceb5b5
L
3247 /* Convert to "jmp foo nop". */
3248 modrm = 0xe9;
3249 nop = NOP_OPCODE;
3250 nop_offset = irel->r_offset + 3;
3251 disp = bfd_get_32 (abfd, contents + irel->r_offset);
3252 irel->r_offset -= 1;
3253 bfd_put_32 (abfd, disp, contents + irel->r_offset);
3254 }
3255 else
3256 {
3257 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
3258 is a nop prefix. */
3259 modrm = 0xe8;
caa65211
L
3260 nop = link_info->call_nop_byte;
3261 if (link_info->call_nop_as_suffix)
3262 {
3263 nop_offset = irel->r_offset + 3;
3264 disp = bfd_get_32 (abfd, contents + irel->r_offset);
3265 irel->r_offset -= 1;
3266 bfd_put_32 (abfd, disp, contents + irel->r_offset);
3267 }
3268 else
3269 nop_offset = irel->r_offset - 2;
56ceb5b5
L
3270 }
3271 bfd_put_8 (abfd, nop, contents + nop_offset);
3272 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
3273 r_type = R_X86_64_PC32;
3274 }
3275 else
3276 {
3277 if (opcode == 0x8b)
3278 {
3279 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
3280 "lea foo(%rip), %reg". */
3281 opcode = 0x8d;
3282 r_type = R_X86_64_PC32;
3283 }
3284 else
3285 {
3286 modrm = bfd_get_8 (abfd, contents + roff - 1);
3287 if (opcode == 0x85)
3288 {
3289 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
3290 "test $foo, %reg". */
3291 modrm = 0xc0 | (modrm & 0x38) >> 3;
3292 opcode = 0xf7;
3293 }
3294 else
3295 {
3296 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
3297 "binop $foo, %reg". */
3298 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
3299 opcode = 0x81;
3300 }
3301 bfd_put_8 (abfd, modrm, contents + roff - 1);
3302
3303 if (r_type == R_X86_64_REX_GOTPCRELX)
3304 {
3305 /* Move the R bit to the B bit in REX byte. */
3306 unsigned int rex = bfd_get_8 (abfd, contents + roff - 3);
3307 rex = (rex & ~REX_R) | (rex & REX_R) >> 2;
3308 bfd_put_8 (abfd, rex, contents + roff - 3);
3309 }
3310 /* No addend for R_X86_64_32S relocation. */
3311 irel->r_addend = 0;
3312 r_type = R_X86_64_32S;
3313 }
3314
3315 bfd_put_8 (abfd, opcode, contents + roff - 2);
3316 }
3317
3318 irel->r_info = htab->r_info (r_symndx, r_type);
59cab532
L
3319 changed_contents = TRUE;
3320 changed_relocs = TRUE;
3321
77697d41 3322 if (h)
59cab532 3323 {
77697d41
L
3324 if (h->got.refcount > 0)
3325 h->got.refcount -= 1;
59cab532
L
3326 }
3327 else
daa67607 3328 {
77697d41
L
3329 if (local_got_refcounts != NULL
3330 && local_got_refcounts[r_symndx] > 0)
3331 local_got_refcounts[r_symndx] -= 1;
daa67607
L
3332 }
3333 }
3334
3335 if (contents != NULL
3336 && elf_section_data (sec)->this_hdr.contents != contents)
3337 {
3338 if (!changed_contents && !link_info->keep_memory)
3339 free (contents);
3340 else
3341 {
3342 /* Cache the section contents for elf_link_input_bfd. */
3343 elf_section_data (sec)->this_hdr.contents = contents;
3344 }
3345 }
3346
3347 if (elf_section_data (sec)->relocs != internal_relocs)
3348 {
3349 if (!changed_relocs)
3350 free (internal_relocs);
3351 else
3352 elf_section_data (sec)->relocs = internal_relocs;
3353 }
3354
3355 return TRUE;
3356
3357 error_return:
3358 if (contents != NULL
3359 && elf_section_data (sec)->this_hdr.contents != contents)
3360 free (contents);
3361 if (internal_relocs != NULL
3362 && elf_section_data (sec)->relocs != internal_relocs)
3363 free (internal_relocs);
3364 return FALSE;
3365}
3366
70256ad8
AJ
3367/* Set the sizes of the dynamic sections. */
3368
b34976b6 3369static bfd_boolean
351f65ca
L
3370elf_x86_64_size_dynamic_sections (bfd *output_bfd,
3371 struct bfd_link_info *info)
70256ad8 3372{
351f65ca 3373 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ
3374 bfd *dynobj;
3375 asection *s;
b34976b6 3376 bfd_boolean relocs;
c434dee6 3377 bfd *ibfd;
351f65ca 3378 const struct elf_backend_data *bed;
70256ad8 3379
351f65ca 3380 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
3381 if (htab == NULL)
3382 return FALSE;
351f65ca 3383 bed = get_elf_backend_data (output_bfd);
4dfe6ac6 3384
c434dee6
AJ
3385 dynobj = htab->elf.dynobj;
3386 if (dynobj == NULL)
3387 abort ();
70256ad8 3388
c434dee6 3389 if (htab->elf.dynamic_sections_created)
70256ad8
AJ
3390 {
3391 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 3392 if (bfd_link_executable (info) && !info->nointerp)
70256ad8 3393 {
3d4d4302 3394 s = bfd_get_linker_section (dynobj, ".interp");
c434dee6
AJ
3395 if (s == NULL)
3396 abort ();
351f65ca
L
3397 s->size = htab->dynamic_interpreter_size;
3398 s->contents = (unsigned char *) htab->dynamic_interpreter;
70256ad8
AJ
3399 }
3400 }
70256ad8 3401
c434dee6
AJ
3402 /* Set up .got offsets for local syms, and space for local dynamic
3403 relocs. */
c72f2fb2 3404 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
70256ad8 3405 {
c434dee6
AJ
3406 bfd_signed_vma *local_got;
3407 bfd_signed_vma *end_local_got;
bffbf940 3408 char *local_tls_type;
67a4f2b7 3409 bfd_vma *local_tlsdesc_gotent;
c434dee6
AJ
3410 bfd_size_type locsymcount;
3411 Elf_Internal_Shdr *symtab_hdr;
3412 asection *srel;
70256ad8 3413
0ffa91dd 3414 if (! is_x86_64_elf (ibfd))
70256ad8
AJ
3415 continue;
3416
c434dee6 3417 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 3418 {
e03a8ed8 3419 struct elf_dyn_relocs *p;
c434dee6 3420
56ceb5b5 3421 if (!elf_x86_64_convert_load (ibfd, s, info))
daa67607
L
3422 return FALSE;
3423
e03a8ed8 3424 for (p = (struct elf_dyn_relocs *)
e81d3500 3425 (elf_section_data (s)->local_dynrel);
c434dee6
AJ
3426 p != NULL;
3427 p = p->next)
70256ad8 3428 {
c434dee6
AJ
3429 if (!bfd_is_abs_section (p->sec)
3430 && bfd_is_abs_section (p->sec->output_section))
3431 {
3432 /* Input section has been discarded, either because
3433 it is a copy of a linkonce section or due to
3434 linker script /DISCARD/, so we'll be discarding
3435 the relocs too. */
3436 }
3437 else if (p->count != 0)
3438 {
3439 srel = elf_section_data (p->sec)->sreloc;
351f65ca 3440 srel->size += p->count * bed->s->sizeof_rela;
4b819e1f
L
3441 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3442 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L
3443 {
3444 info->flags |= DF_TEXTREL;
0e1862bb 3445 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd
L
3446 || info->error_textrel)
3447 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
b70321a2 3448 p->sec->owner, p->sec);
b70321a2 3449 }
c434dee6 3450 }
70256ad8
AJ
3451 }
3452 }
c434dee6
AJ
3453
3454 local_got = elf_local_got_refcounts (ibfd);
3455 if (!local_got)
3456 continue;
3457
0ffa91dd 3458 symtab_hdr = &elf_symtab_hdr (ibfd);
c434dee6
AJ
3459 locsymcount = symtab_hdr->sh_info;
3460 end_local_got = local_got + locsymcount;
351f65ca
L
3461 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
3462 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
6de2ae4a
L
3463 s = htab->elf.sgot;
3464 srel = htab->elf.srelgot;
67a4f2b7
AO
3465 for (; local_got < end_local_got;
3466 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
70256ad8 3467 {
67a4f2b7 3468 *local_tlsdesc_gotent = (bfd_vma) -1;
c434dee6 3469 if (*local_got > 0)
70256ad8 3470 {
67a4f2b7
AO
3471 if (GOT_TLS_GDESC_P (*local_tls_type))
3472 {
6de2ae4a 3473 *local_tlsdesc_gotent = htab->elf.sgotplt->size
351f65ca 3474 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 3475 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO
3476 *local_got = (bfd_vma) -2;
3477 }
3478 if (! GOT_TLS_GDESC_P (*local_tls_type)
3479 || GOT_TLS_GD_P (*local_tls_type))
3480 {
3481 *local_got = s->size;
3482 s->size += GOT_ENTRY_SIZE;
3483 if (GOT_TLS_GD_P (*local_tls_type))
3484 s->size += GOT_ENTRY_SIZE;
3485 }
0e1862bb 3486 if (bfd_link_pic (info)
67a4f2b7 3487 || GOT_TLS_GD_ANY_P (*local_tls_type)
bffbf940 3488 || *local_tls_type == GOT_TLS_IE)
67a4f2b7
AO
3489 {
3490 if (GOT_TLS_GDESC_P (*local_tls_type))
3491 {
6de2ae4a 3492 htab->elf.srelplt->size
351f65ca 3493 += bed->s->sizeof_rela;
67a4f2b7
AO
3494 htab->tlsdesc_plt = (bfd_vma) -1;
3495 }
3496 if (! GOT_TLS_GDESC_P (*local_tls_type)
3497 || GOT_TLS_GD_P (*local_tls_type))
351f65ca 3498 srel->size += bed->s->sizeof_rela;
67a4f2b7 3499 }
70256ad8
AJ
3500 }
3501 else
c434dee6
AJ
3502 *local_got = (bfd_vma) -1;
3503 }
3504 }
70256ad8 3505
bffbf940
JJ
3506 if (htab->tls_ld_got.refcount > 0)
3507 {
3508 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3509 relocs. */
6de2ae4a
L
3510 htab->tls_ld_got.offset = htab->elf.sgot->size;
3511 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
351f65ca 3512 htab->elf.srelgot->size += bed->s->sizeof_rela;
bffbf940
JJ
3513 }
3514 else
3515 htab->tls_ld_got.offset = -1;
3516
c434dee6
AJ
3517 /* Allocate global sym .plt and .got entries, and space for global
3518 sym dynamic relocs. */
351f65ca 3519 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
eb4ff4d6 3520 info);
c434dee6 3521
c25bc9fc
L
3522 /* Allocate .plt and .got entries, and space for local symbols. */
3523 htab_traverse (htab->loc_hash_table,
351f65ca 3524 elf_x86_64_allocate_local_dynrelocs,
c25bc9fc
L
3525 info);
3526
67a4f2b7
AO
3527 /* For every jump slot reserved in the sgotplt, reloc_count is
3528 incremented. However, when we reserve space for TLS descriptors,
3529 it's not incremented, so in order to compute the space reserved
3530 for them, it suffices to multiply the reloc count by the jump
e1f98742
L
3531 slot size.
3532
3533 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3534 so that R_X86_64_IRELATIVE entries come last. */
6de2ae4a 3535 if (htab->elf.srelplt)
e1f98742
L
3536 {
3537 htab->sgotplt_jump_table_size
3538 = elf_x86_64_compute_jump_table_size (htab);
3539 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3540 }
3541 else if (htab->elf.irelplt)
3542 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
67a4f2b7
AO
3543
3544 if (htab->tlsdesc_plt)
3545 {
3546 /* If we're not using lazy TLS relocations, don't generate the
3547 PLT and GOT entries they require. */
3548 if ((info->flags & DF_BIND_NOW))
3549 htab->tlsdesc_plt = 0;
3550 else
3551 {
6de2ae4a
L
3552 htab->tlsdesc_got = htab->elf.sgot->size;
3553 htab->elf.sgot->size += GOT_ENTRY_SIZE;
67a4f2b7
AO
3554 /* Reserve room for the initial entry.
3555 FIXME: we could probably do away with it in this case. */
6de2ae4a 3556 if (htab->elf.splt->size == 0)
eed180f8 3557 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
6de2ae4a 3558 htab->tlsdesc_plt = htab->elf.splt->size;
eed180f8 3559 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
67a4f2b7
AO
3560 }
3561 }
3562
a7b16ceb
L
3563 if (htab->elf.sgotplt)
3564 {
3565 /* Don't allocate .got.plt section if there are no GOT nor PLT
eed180f8 3566 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L
3567 if ((htab->elf.hgot == NULL
3568 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L
3569 && (htab->elf.sgotplt->size
3570 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L
3571 && (htab->elf.splt == NULL
3572 || htab->elf.splt->size == 0)
3573 && (htab->elf.sgot == NULL
3574 || htab->elf.sgot->size == 0)
3575 && (htab->elf.iplt == NULL
3576 || htab->elf.iplt->size == 0)
3577 && (htab->elf.igotplt == NULL
3578 || htab->elf.igotplt->size == 0))
3579 htab->elf.sgotplt->size = 0;
3580 }
3581
9a2a56cc
AM
3582 if (htab->plt_eh_frame != NULL
3583 && htab->elf.splt != NULL
3584 && htab->elf.splt->size != 0
3585 && !bfd_is_abs_section (htab->elf.splt->output_section)
3586 && _bfd_elf_eh_frame_present (info))
3587 {
3588 const struct elf_x86_64_backend_data *arch_data
f8222080 3589 = get_elf_x86_64_arch_data (bed);
9a2a56cc
AM
3590 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
3591 }
3592
c434dee6
AJ
3593 /* We now have determined the sizes of the various dynamic sections.
3594 Allocate memory for them. */
b34976b6 3595 relocs = FALSE;
c434dee6
AJ
3596 for (s = dynobj->sections; s != NULL; s = s->next)
3597 {
3598 if ((s->flags & SEC_LINKER_CREATED) == 0)
3599 continue;
3600
6de2ae4a
L
3601 if (s == htab->elf.splt
3602 || s == htab->elf.sgot
3603 || s == htab->elf.sgotplt
3604 || s == htab->elf.iplt
3605 || s == htab->elf.igotplt
0ff2b86e 3606 || s == htab->plt_bnd
dd7e64d4 3607 || s == htab->plt_got
9a2a56cc 3608 || s == htab->plt_eh_frame
75ff4589 3609 || s == htab->sdynbss)
c434dee6
AJ
3610 {
3611 /* Strip this section if we don't need it; see the
3612 comment below. */
3613 }
0112cd26 3614 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
c434dee6 3615 {
6de2ae4a 3616 if (s->size != 0 && s != htab->elf.srelplt)
b34976b6 3617 relocs = TRUE;
c434dee6
AJ
3618
3619 /* We use the reloc_count field as a counter if we need
3620 to copy relocs into the output file. */
6de2ae4a 3621 if (s != htab->elf.srelplt)
67a4f2b7 3622 s->reloc_count = 0;
70256ad8 3623 }
c434dee6 3624 else
70256ad8
AJ
3625 {
3626 /* It's not one of our sections, so don't allocate space. */
3627 continue;
3628 }
3629
eea6121a 3630 if (s->size == 0)
70256ad8 3631 {
c434dee6
AJ
3632 /* If we don't need this section, strip it from the
3633 output file. This is mostly to handle .rela.bss and
3634 .rela.plt. We must create both sections in
3635 create_dynamic_sections, because they must be created
3636 before the linker maps input sections to output
3637 sections. The linker does that before
3638 adjust_dynamic_symbol is called, and it is that
3639 function which decides whether anything needs to go
3640 into these sections. */
3641
8423293d 3642 s->flags |= SEC_EXCLUDE;
70256ad8
AJ
3643 continue;
3644 }
3645
c456f082
AM
3646 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3647 continue;
3648
70256ad8
AJ
3649 /* Allocate memory for the section contents. We use bfd_zalloc
3650 here in case unused entries are not reclaimed before the
3651 section's contents are written out. This should not happen,
3652 but this way if it does, we get a R_X86_64_NONE reloc instead
3653 of garbage. */
eea6121a 3654 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
c434dee6 3655 if (s->contents == NULL)
b34976b6 3656 return FALSE;
70256ad8
AJ
3657 }
3658
e41b3a13 3659 if (htab->plt_eh_frame != NULL
9a2a56cc
AM
3660 && htab->plt_eh_frame->contents != NULL)
3661 {
3662 const struct elf_x86_64_backend_data *arch_data
f8222080 3663 = get_elf_x86_64_arch_data (bed);
9a2a56cc
AM
3664
3665 memcpy (htab->plt_eh_frame->contents,
3666 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3667 bfd_put_32 (dynobj, htab->elf.splt->size,
3668 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3669 }
e41b3a13 3670
c434dee6 3671 if (htab->elf.dynamic_sections_created)
70256ad8
AJ
3672 {
3673 /* Add some entries to the .dynamic section. We fill in the
351f65ca 3674 values later, in elf_x86_64_finish_dynamic_sections, but we
70256ad8 3675 must add the entries now so that we get the correct size for
407443a3 3676 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 3677 dynamic linker and used by the debugger. */
dc810e39 3678#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3679 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3680
0e1862bb 3681 if (bfd_link_executable (info))
70256ad8 3682 {
dc810e39 3683 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3684 return FALSE;
70256ad8
AJ
3685 }
3686
6de2ae4a 3687 if (htab->elf.splt->size != 0)
70256ad8 3688 {
7c1e8d3e
L
3689 /* DT_PLTGOT is used by prelink even if there is no PLT
3690 relocation. */
3691 if (!add_dynamic_entry (DT_PLTGOT, 0))
b34976b6 3692 return FALSE;
67a4f2b7 3693
7c1e8d3e
L
3694 if (htab->elf.srelplt->size != 0)
3695 {
3696 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3697 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3698 || !add_dynamic_entry (DT_JMPREL, 0))
3699 return FALSE;
3700 }
3701
67a4f2b7
AO
3702 if (htab->tlsdesc_plt
3703 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3704 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3705 return FALSE;
70256ad8
AJ
3706 }
3707
3708 if (relocs)
3709 {
dc810e39
AM
3710 if (!add_dynamic_entry (DT_RELA, 0)
3711 || !add_dynamic_entry (DT_RELASZ, 0)
351f65ca 3712 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
b34976b6 3713 return FALSE;
70256ad8 3714
c434dee6
AJ
3715 /* If any dynamic relocs apply to a read-only section,
3716 then we need a DT_TEXTREL entry. */
3717 if ((info->flags & DF_TEXTREL) == 0)
eed180f8 3718 elf_link_hash_traverse (&htab->elf,
351f65ca 3719 elf_x86_64_readonly_dynrelocs,
eb4ff4d6 3720 info);
c434dee6
AJ
3721
3722 if ((info->flags & DF_TEXTREL) != 0)
3723 {
8efa2874
L
3724 if ((elf_tdata (output_bfd)->has_gnu_symbols
3725 & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc)
3726 {
3727 info->callbacks->einfo
3728 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3729 bfd_set_error (bfd_error_bad_value);
3730 return FALSE;
3731 }
3732
c434dee6 3733 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3734 return FALSE;
c434dee6 3735 }
70256ad8
AJ
3736 }
3737 }
dc810e39 3738#undef add_dynamic_entry
70256ad8 3739
b34976b6 3740 return TRUE;
70256ad8
AJ
3741}
3742
67a4f2b7 3743static bfd_boolean
351f65ca
L
3744elf_x86_64_always_size_sections (bfd *output_bfd,
3745 struct bfd_link_info *info)
67a4f2b7
AO
3746{
3747 asection *tls_sec = elf_hash_table (info)->tls_sec;
3748
3749 if (tls_sec)
3750 {
3751 struct elf_link_hash_entry *tlsbase;
3752
3753 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3754 "_TLS_MODULE_BASE_",
3755 FALSE, FALSE, FALSE);
3756
3757 if (tlsbase && tlsbase->type == STT_TLS)
3758 {
351f65ca 3759 struct elf_x86_64_link_hash_table *htab;
67a4f2b7
AO
3760 struct bfd_link_hash_entry *bh = NULL;
3761 const struct elf_backend_data *bed
3762 = get_elf_backend_data (output_bfd);
3763
351f65ca 3764 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
3765 if (htab == NULL)
3766 return FALSE;
3767
67a4f2b7
AO
3768 if (!(_bfd_generic_link_add_one_symbol
3769 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3770 tls_sec, 0, NULL, FALSE,
3771 bed->collect, &bh)))
3772 return FALSE;
9f03412a 3773
4dfe6ac6 3774 htab->tls_module_base = bh;
9f03412a 3775
67a4f2b7
AO
3776 tlsbase = (struct elf_link_hash_entry *)bh;
3777 tlsbase->def_regular = 1;
3778 tlsbase->other = STV_HIDDEN;
576fa883 3779 tlsbase->root.linker_def = 1;
67a4f2b7
AO
3780 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3781 }
3782 }
3783
3784 return TRUE;
3785}
3786
9f03412a
AO
3787/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3788 executables. Rather than setting it to the beginning of the TLS
3789 section, we have to set it to the end. This function may be called
3790 multiple times, it is idempotent. */
3791
3792static void
351f65ca 3793elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3794{
351f65ca 3795 struct elf_x86_64_link_hash_table *htab;
9f03412a
AO
3796 struct bfd_link_hash_entry *base;
3797
0e1862bb 3798 if (!bfd_link_executable (info))
9f03412a
AO
3799 return;
3800
351f65ca 3801 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
3802 if (htab == NULL)
3803 return;
9f03412a 3804
4dfe6ac6
NC
3805 base = htab->tls_module_base;
3806 if (base == NULL)
9f03412a
AO
3807 return;
3808
4dfe6ac6 3809 base->u.def.value = htab->elf.tls_size;
9f03412a
AO
3810}
3811
bffbf940
JJ
3812/* Return the base VMA address which should be subtracted from real addresses
3813 when resolving @dtpoff relocation.
3814 This is PT_TLS segment p_vaddr. */
3815
3816static bfd_vma
351f65ca 3817elf_x86_64_dtpoff_base (struct bfd_link_info *info)
bffbf940 3818{
e1918d23
AM
3819 /* If tls_sec is NULL, we should have signalled an error already. */
3820 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 3821 return 0;
e1918d23 3822 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ
3823}
3824
3825/* Return the relocation value for @tpoff relocation
3826 if STT_TLS virtual address is ADDRESS. */
3827
3828static bfd_vma
351f65ca 3829elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 3830{
e1918d23 3831 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO
3832 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3833 bfd_vma static_tls_size;
bffbf940
JJ
3834
3835 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 3836 if (htab->tls_sec == NULL)
bffbf940 3837 return 0;
7dc98aea
RO
3838
3839 /* Consider special static TLS alignment requirements. */
3840 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3841 return address - static_tls_size - htab->tls_sec->vma;
bffbf940
JJ
3842}
3843
90f487df
L
3844/* Is the instruction before OFFSET in CONTENTS a 32bit relative
3845 branch? */
3846
3847static bfd_boolean
3848is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3849{
3850 /* Opcode Instruction
3851 0xe8 call
3852 0xe9 jump
3853 0x0f 0x8x conditional jump */
3854 return ((offset > 0
3855 && (contents [offset - 1] == 0xe8
3856 || contents [offset - 1] == 0xe9))
3857 || (offset > 1
3858 && contents [offset - 2] == 0x0f
3859 && (contents [offset - 1] & 0xf0) == 0x80));
3860}
3861
8d88c4ca
NC
3862/* Relocate an x86_64 ELF section. */
3863
b34976b6 3864static bfd_boolean
351f65ca
L
3865elf_x86_64_relocate_section (bfd *output_bfd,
3866 struct bfd_link_info *info,
3867 bfd *input_bfd,
3868 asection *input_section,
3869 bfd_byte *contents,
3870 Elf_Internal_Rela *relocs,
3871 Elf_Internal_Sym *local_syms,
3872 asection **local_sections)
8d88c4ca 3873{
351f65ca 3874 struct elf_x86_64_link_hash_table *htab;
8d88c4ca
NC
3875 Elf_Internal_Shdr *symtab_hdr;
3876 struct elf_link_hash_entry **sym_hashes;
3877 bfd_vma *local_got_offsets;
67a4f2b7 3878 bfd_vma *local_tlsdesc_gotents;
c434dee6 3879 Elf_Internal_Rela *rel;
60f2e42e 3880 Elf_Internal_Rela *wrel;
8d88c4ca 3881 Elf_Internal_Rela *relend;
eed180f8 3882 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
8d88c4ca 3883
0ffa91dd
NC
3884 BFD_ASSERT (is_x86_64_elf (input_bfd));
3885
351f65ca 3886 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
3887 if (htab == NULL)
3888 return FALSE;
0ffa91dd 3889 symtab_hdr = &elf_symtab_hdr (input_bfd);
8d88c4ca
NC
3890 sym_hashes = elf_sym_hashes (input_bfd);
3891 local_got_offsets = elf_local_got_offsets (input_bfd);
351f65ca 3892 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
8d88c4ca 3893
351f65ca 3894 elf_x86_64_set_tls_module_base (info);
9f03412a 3895
60f2e42e 3896 rel = wrel = relocs;
8d88c4ca 3897 relend = relocs + input_section->reloc_count;
60f2e42e 3898 for (; rel < relend; wrel++, rel++)
8d88c4ca 3899 {
bffbf940 3900 unsigned int r_type;
8d88c4ca
NC
3901 reloc_howto_type *howto;
3902 unsigned long r_symndx;
3903 struct elf_link_hash_entry *h;
0ff2b86e 3904 struct elf_x86_64_link_hash_entry *eh;
8d88c4ca
NC
3905 Elf_Internal_Sym *sym;
3906 asection *sec;
0ff2b86e 3907 bfd_vma off, offplt, plt_offset;
8d88c4ca 3908 bfd_vma relocation;
b34976b6 3909 bfd_boolean unresolved_reloc;
8d88c4ca 3910 bfd_reloc_status_type r;
bffbf940 3911 int tls_type;
0ff2b86e 3912 asection *base_got, *resolved_plt;
1788fc08 3913 bfd_vma st_size;
8d88c4ca 3914
351f65ca 3915 r_type = ELF32_R_TYPE (rel->r_info);
fe4770f4
AJ
3916 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3917 || r_type == (int) R_X86_64_GNU_VTENTRY)
18954b29
L
3918 {
3919 if (wrel != rel)
3920 *wrel = *rel;
3921 continue;
3922 }
8d88c4ca 3923
9911c0fc 3924 if (r_type >= (int) R_X86_64_standard)
8da6118f 3925 {
9911c0fc
L
3926 (*_bfd_error_handler)
3927 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3928 input_bfd, input_section, r_type);
8da6118f 3929 bfd_set_error (bfd_error_bad_value);
b34976b6 3930 return FALSE;
8da6118f 3931 }
8d88c4ca 3932
d7921315 3933 if (r_type != (int) R_X86_64_32
eed180f8 3934 || ABI_64_P (output_bfd))
d7921315
L
3935 howto = x86_64_elf_howto_table + r_type;
3936 else
3937 howto = (x86_64_elf_howto_table
3938 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
351f65ca 3939 r_symndx = htab->r_sym (rel->r_info);
8d88c4ca
NC
3940 h = NULL;
3941 sym = NULL;
3942 sec = NULL;
b34976b6 3943 unresolved_reloc = FALSE;
8d88c4ca 3944 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH
3945 {
3946 sym = local_syms + r_symndx;
3947 sec = local_sections[r_symndx];
c434dee6 3948
c25bc9fc
L
3949 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3950 &sec, rel);
1788fc08 3951 st_size = sym->st_size;
c25bc9fc
L
3952
3953 /* Relocate against local STT_GNU_IFUNC symbol. */
0e1862bb 3954 if (!bfd_link_relocatable (info)
351f65ca 3955 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc 3956 {
351f65ca
L
3957 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3958 rel, FALSE);
c25bc9fc
L
3959 if (h == NULL)
3960 abort ();
3961
eed180f8 3962 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L
3963 h->root.u.def.value = sym->st_value;
3964 h->root.u.def.section = sec;
3965 }
8da6118f 3966 }
8d88c4ca 3967 else
8da6118f 3968 {
c9736ba0 3969 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 3970 bfd_boolean ignored ATTRIBUTE_UNUSED;
c434dee6 3971
b2a8e766
AM
3972 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3973 r_symndx, symtab_hdr, sym_hashes,
3974 h, sec, relocation,
62d887d4 3975 unresolved_reloc, warned, ignored);
1788fc08 3976 st_size = h->size;
8da6118f 3977 }
ab96bf03 3978
dbaa2011 3979 if (sec != NULL && discarded_section (sec))
60f2e42e
L
3980 {
3981 _bfd_clear_contents (howto, input_bfd, input_section,
3982 contents + rel->r_offset);
3983 wrel->r_offset = rel->r_offset;
3984 wrel->r_info = 0;
3985 wrel->r_addend = 0;
3986
3987 /* For ld -r, remove relocations in debug sections against
3988 sections defined in discarded sections. Not done for
3989 eh_frame editing code expects to be present. */
3990 if (bfd_link_relocatable (info)
3991 && (input_section->flags & SEC_DEBUGGING))
3992 wrel--;
3993
3994 continue;
3995 }
ab96bf03 3996
0e1862bb 3997 if (bfd_link_relocatable (info))
2d5da473
L
3998 {
3999 if (wrel != rel)
4000 *wrel = *rel;
4001 continue;
4002 }
ab96bf03 4003
1788fc08 4004 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
64d25c44 4005 {
1788fc08
L
4006 if (r_type == R_X86_64_64)
4007 {
4008 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
4009 zero-extend it to 64bit if addend is zero. */
4010 r_type = R_X86_64_32;
4011 memset (contents + rel->r_offset + 4, 0, 4);
4012 }
4013 else if (r_type == R_X86_64_SIZE64)
4014 {
4015 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
4016 zero-extend it to 64bit if addend is zero. */
4017 r_type = R_X86_64_SIZE32;
4018 memset (contents + rel->r_offset + 4, 0, 4);
4019 }
64d25c44
L
4020 }
4021
0ff2b86e
L
4022 eh = (struct elf_x86_64_link_hash_entry *) h;
4023
cbe950e9
L
4024 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4025 it here if it is defined in a non-shared object. */
4026 if (h != NULL
4027 && h->type == STT_GNU_IFUNC
4028 && h->def_regular)
4029 {
cbe950e9 4030 bfd_vma plt_index;
4c544807 4031 const char *name;
cbe950e9 4032
97dc35c8
L
4033 if ((input_section->flags & SEC_ALLOC) == 0)
4034 {
4035 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4036 sections because such sections are not SEC_ALLOC and
4037 thus ld.so will not process them. */
4038 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 4039 continue;
97dc35c8
L
4040 abort ();
4041 }
4042 else if (h->plt.offset == (bfd_vma) -1)
cbe950e9
L
4043 abort ();
4044
4045 /* STT_GNU_IFUNC symbol must go through PLT. */
0ff2b86e
L
4046 if (htab->elf.splt != NULL)
4047 {
4048 if (htab->plt_bnd != NULL)
4049 {
4050 resolved_plt = htab->plt_bnd;
4051 plt_offset = eh->plt_bnd.offset;
4052 }
4053 else
4054 {
4055 resolved_plt = htab->elf.splt;
4056 plt_offset = h->plt.offset;
4057 }
4058 }
4059 else
4060 {
4061 resolved_plt = htab->elf.iplt;
4062 plt_offset = h->plt.offset;
4063 }
4064
4065 relocation = (resolved_plt->output_section->vma
4066 + resolved_plt->output_offset + plt_offset);
cbe950e9
L
4067
4068 switch (r_type)
4069 {
4070 default:
4c544807
L
4071 if (h->root.root.string)
4072 name = h->root.root.string;
4073 else
4074 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4075 NULL);
cbe950e9
L
4076 (*_bfd_error_handler)
4077 (_("%B: relocation %s against STT_GNU_IFUNC "
4078 "symbol `%s' isn't handled by %s"), input_bfd,
4079 x86_64_elf_howto_table[r_type].name,
4c544807 4080 name, __FUNCTION__);
cbe950e9
L
4081 bfd_set_error (bfd_error_bad_value);
4082 return FALSE;
4083
4084 case R_X86_64_32S:
0e1862bb 4085 if (bfd_link_pic (info))
cbe950e9 4086 abort ();
710ab287
L
4087 goto do_relocation;
4088
248775ba
L
4089 case R_X86_64_32:
4090 if (ABI_64_P (output_bfd))
4091 goto do_relocation;
17672001 4092 /* FALLTHROUGH */
eed180f8 4093 case R_X86_64_64:
710ab287
L
4094 if (rel->r_addend != 0)
4095 {
4c544807
L
4096 if (h->root.root.string)
4097 name = h->root.root.string;
4098 else
4099 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4100 sym, NULL);
710ab287
L
4101 (*_bfd_error_handler)
4102 (_("%B: relocation %s against STT_GNU_IFUNC "
4103 "symbol `%s' has non-zero addend: %d"),
4104 input_bfd, x86_64_elf_howto_table[r_type].name,
4c544807 4105 name, rel->r_addend);
710ab287
L
4106 bfd_set_error (bfd_error_bad_value);
4107 return FALSE;
4108 }
4109
4110 /* Generate dynamic relcoation only when there is a
c293fa49 4111 non-GOT reference in a shared object. */
0e1862bb 4112 if (bfd_link_pic (info) && h->non_got_ref)
710ab287
L
4113 {
4114 Elf_Internal_Rela outrel;
710ab287
L
4115 asection *sreloc;
4116
c25bc9fc
L
4117 /* Need a dynamic relocation to get the real function
4118 address. */
710ab287
L
4119 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4120 info,
4121 input_section,
4122 rel->r_offset);
4123 if (outrel.r_offset == (bfd_vma) -1
4124 || outrel.r_offset == (bfd_vma) -2)
4125 abort ();
4126
4127 outrel.r_offset += (input_section->output_section->vma
4128 + input_section->output_offset);
4129
4130 if (h->dynindx == -1
44c4ea11 4131 || h->forced_local
0e1862bb 4132 || bfd_link_executable (info))
710ab287
L
4133 {
4134 /* This symbol is resolved locally. */
56b8aada
L
4135 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4136 outrel.r_addend = (h->root.u.def.value
4137 + h->root.u.def.section->output_section->vma
4138 + h->root.u.def.section->output_offset);
710ab287
L
4139 }
4140 else
4141 {
351f65ca 4142 outrel.r_info = htab->r_info (h->dynindx, r_type);
710ab287
L
4143 outrel.r_addend = 0;
4144 }
4145
6de2ae4a 4146 sreloc = htab->elf.irelifunc;
351f65ca 4147 elf_append_rela (output_bfd, sreloc, &outrel);
710ab287
L
4148
4149 /* If this reloc is against an external symbol, we
4150 do not want to fiddle with the addend. Otherwise,
4151 we need to include the symbol value so that it
4152 becomes an addend for the dynamic reloc. For an
4153 internal symbol, we have updated addend. */
56b8aada 4154 continue;
710ab287 4155 }
17672001 4156 /* FALLTHROUGH */
cbe950e9 4157 case R_X86_64_PC32:
c3320543 4158 case R_X86_64_PC32_BND:
cbe950e9
L
4159 case R_X86_64_PC64:
4160 case R_X86_64_PLT32:
c3320543 4161 case R_X86_64_PLT32_BND:
cbe950e9
L
4162 goto do_relocation;
4163
4164 case R_X86_64_GOTPCREL:
56ceb5b5
L
4165 case R_X86_64_GOTPCRELX:
4166 case R_X86_64_REX_GOTPCRELX:
cbe950e9 4167 case R_X86_64_GOTPCREL64:
6de2ae4a 4168 base_got = htab->elf.sgot;
cbe950e9
L
4169 off = h->got.offset;
4170
7afd84dc 4171 if (base_got == NULL)
cbe950e9
L
4172 abort ();
4173
7afd84dc 4174 if (off == (bfd_vma) -1)
cbe950e9 4175 {
7afd84dc
L
4176 /* We can't use h->got.offset here to save state, or
4177 even just remember the offset, as finish_dynamic_symbol
4178 would use that as offset into .got. */
cbe950e9 4179
6de2ae4a 4180 if (htab->elf.splt != NULL)
7afd84dc 4181 {
eed180f8 4182 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 4183 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 4184 base_got = htab->elf.sgotplt;
7afd84dc 4185 }
cbe950e9
L
4186 else
4187 {
eed180f8 4188 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 4189 off = plt_index * GOT_ENTRY_SIZE;
6de2ae4a 4190 base_got = htab->elf.igotplt;
7afd84dc
L
4191 }
4192
4193 if (h->dynindx == -1
4194 || h->forced_local
4195 || info->symbolic)
4196 {
eed180f8 4197 /* This references the local defitionion. We must
7afd84dc 4198 initialize this entry in the global offset table.
eed180f8 4199 Since the offset must always be a multiple of 8,
7afd84dc
L
4200 we use the least significant bit to record
4201 whether we have initialized it already.
4202
4203 When doing a dynamic link, we create a .rela.got
4204 relocation entry to initialize the value. This
4205 is done in the finish_dynamic_symbol routine. */
4206 if ((off & 1) != 0)
4207 off &= ~1;
4208 else
4209 {
4210 bfd_put_64 (output_bfd, relocation,
4211 base_got->contents + off);
4212 /* Note that this is harmless for the GOTPLT64
4213 case, as -1 | 1 still is -1. */
4214 h->got.offset |= 1;
4215 }
cbe950e9
L
4216 }
4217 }
4218
4219 relocation = (base_got->output_section->vma
4220 + base_got->output_offset + off);
4221
cbe950e9
L
4222 goto do_relocation;
4223 }
4224 }
4225
70256ad8
AJ
4226 /* When generating a shared object, the relocations handled here are
4227 copied into the output file to be resolved at run time. */
4228 switch (r_type)
4229 {
4230 case R_X86_64_GOT32:
7b81dfbb 4231 case R_X86_64_GOT64:
70256ad8
AJ
4232 /* Relocation is to the entry for this symbol in the global
4233 offset table. */
70256ad8 4234 case R_X86_64_GOTPCREL:
56ceb5b5
L
4235 case R_X86_64_GOTPCRELX:
4236 case R_X86_64_REX_GOTPCRELX:
7b81dfbb
AJ
4237 case R_X86_64_GOTPCREL64:
4238 /* Use global offset table entry as symbol value. */
4239 case R_X86_64_GOTPLT64:
553d1284 4240 /* This is obsolete and treated the the same as GOT64. */
6de2ae4a 4241 base_got = htab->elf.sgot;
7b81dfbb 4242
6de2ae4a 4243 if (htab->elf.sgot == NULL)
c434dee6 4244 abort ();
053579d7 4245
51e0a107 4246 if (h != NULL)
70256ad8 4247 {
b34976b6 4248 bfd_boolean dyn;
c434dee6
AJ
4249
4250 off = h->got.offset;
7b81dfbb 4251 if (h->needs_plt
eed180f8 4252 && h->plt.offset != (bfd_vma)-1
7b81dfbb
AJ
4253 && off == (bfd_vma)-1)
4254 {
4255 /* We can't use h->got.offset here to save
4256 state, or even just remember the offset, as
4257 finish_dynamic_symbol would use that as offset into
4258 .got. */
eed180f8 4259 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
7b81dfbb 4260 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 4261 base_got = htab->elf.sgotplt;
7b81dfbb
AJ
4262 }
4263
c434dee6 4264 dyn = htab->elf.dynamic_sections_created;
51e0a107 4265
0e1862bb
L
4266 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4267 || (bfd_link_pic (info)
27482721 4268 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ
4269 || (ELF_ST_VISIBILITY (h->other)
4270 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH
4271 {
4272 /* This is actually a static link, or it is a -Bsymbolic
4273 link and the symbol is defined locally, or the symbol
407443a3 4274 was forced to be local because of a version file. We
51e0a107
JH
4275 must initialize this entry in the global offset table.
4276 Since the offset must always be a multiple of 8, we
4277 use the least significant bit to record whether we
4278 have initialized it already.
4279
4280 When doing a dynamic link, we create a .rela.got
407443a3
AJ
4281 relocation entry to initialize the value. This is
4282 done in the finish_dynamic_symbol routine. */
51e0a107
JH
4283 if ((off & 1) != 0)
4284 off &= ~1;
4285 else
4286 {
4287 bfd_put_64 (output_bfd, relocation,
7b81dfbb
AJ
4288 base_got->contents + off);
4289 /* Note that this is harmless for the GOTPLT64 case,
eed180f8 4290 as -1 | 1 still is -1. */
51e0a107
JH
4291 h->got.offset |= 1;
4292 }
4293 }
053579d7 4294 else
b34976b6 4295 unresolved_reloc = FALSE;
70256ad8 4296 }
51e0a107
JH
4297 else
4298 {
c434dee6
AJ
4299 if (local_got_offsets == NULL)
4300 abort ();
51e0a107
JH
4301
4302 off = local_got_offsets[r_symndx];
4303
4304 /* The offset must always be a multiple of 8. We use
407443a3
AJ
4305 the least significant bit to record whether we have
4306 already generated the necessary reloc. */
51e0a107
JH
4307 if ((off & 1) != 0)
4308 off &= ~1;
4309 else
4310 {
c434dee6 4311 bfd_put_64 (output_bfd, relocation,
7b81dfbb 4312 base_got->contents + off);
51e0a107 4313
0e1862bb 4314 if (bfd_link_pic (info))
51e0a107 4315 {
947216bf 4316 asection *s;
51e0a107 4317 Elf_Internal_Rela outrel;
70256ad8 4318
51e0a107
JH
4319 /* We need to generate a R_X86_64_RELATIVE reloc
4320 for the dynamic linker. */
6de2ae4a 4321 s = htab->elf.srelgot;
947216bf 4322 if (s == NULL)
c434dee6 4323 abort ();
51e0a107 4324
7b81dfbb
AJ
4325 outrel.r_offset = (base_got->output_section->vma
4326 + base_got->output_offset
51e0a107 4327 + off);
351f65ca 4328 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
51e0a107 4329 outrel.r_addend = relocation;
351f65ca 4330 elf_append_rela (output_bfd, s, &outrel);
51e0a107
JH
4331 }
4332
4333 local_got_offsets[r_symndx] |= 1;
4334 }
51e0a107 4335 }
6a2bda3f 4336
c434dee6
AJ
4337 if (off >= (bfd_vma) -2)
4338 abort ();
4339
7b81dfbb
AJ
4340 relocation = base_got->output_section->vma
4341 + base_got->output_offset + off;
56ceb5b5
L
4342 if (r_type != R_X86_64_GOTPCREL
4343 && r_type != R_X86_64_GOTPCRELX
4344 && r_type != R_X86_64_REX_GOTPCRELX
4345 && r_type != R_X86_64_GOTPCREL64)
6de2ae4a
L
4346 relocation -= htab->elf.sgotplt->output_section->vma
4347 - htab->elf.sgotplt->output_offset;
c434dee6 4348
70256ad8
AJ
4349 break;
4350
d6ab8113
JB
4351 case R_X86_64_GOTOFF64:
4352 /* Relocation is relative to the start of the global offset
4353 table. */
4354
3d949995
L
4355 /* Check to make sure it isn't a protected function or data
4356 symbol for shared library since it may not be local when
e3c0e327
L
4357 used as function address or with copy relocation. We also
4358 need to make sure that a symbol is referenced locally. */
0e1862bb 4359 if (bfd_link_pic (info) && h)
d6ab8113 4360 {
e3c0e327
L
4361 if (!h->def_regular)
4362 {
4363 const char *v;
4364
4365 switch (ELF_ST_VISIBILITY (h->other))
4366 {
4367 case STV_HIDDEN:
4368 v = _("hidden symbol");
4369 break;
4370 case STV_INTERNAL:
4371 v = _("internal symbol");
4372 break;
4373 case STV_PROTECTED:
4374 v = _("protected symbol");
4375 break;
4376 default:
4377 v = _("symbol");
4378 break;
4379 }
4380
4381 (*_bfd_error_handler)
4382 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
4383 input_bfd, v, h->root.root.string);
4384 bfd_set_error (bfd_error_bad_value);
4385 return FALSE;
4386 }
0e1862bb 4387 else if (!bfd_link_executable (info)
e3c0e327
L
4388 && !SYMBOL_REFERENCES_LOCAL (info, h)
4389 && (h->type == STT_FUNC
4390 || h->type == STT_OBJECT)
4391 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4392 {
4393 (*_bfd_error_handler)
4394 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
4395 input_bfd,
4396 h->type == STT_FUNC ? "function" : "data",
4397 h->root.root.string);
4398 bfd_set_error (bfd_error_bad_value);
d6ab8113 4399 return FALSE;
e3c0e327 4400 }
d6ab8113
JB
4401 }
4402
4403 /* Note that sgot is not involved in this
4404 calculation. We always want the start of .got.plt. If we
4405 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4406 permitted by the ABI, we might have to change this
4407 calculation. */
6de2ae4a
L
4408 relocation -= htab->elf.sgotplt->output_section->vma
4409 + htab->elf.sgotplt->output_offset;
d6ab8113
JB
4410 break;
4411
4412 case R_X86_64_GOTPC32:
7b81dfbb 4413 case R_X86_64_GOTPC64:
d6ab8113 4414 /* Use global offset table as symbol value. */
6de2ae4a
L
4415 relocation = htab->elf.sgotplt->output_section->vma
4416 + htab->elf.sgotplt->output_offset;
d6ab8113
JB
4417 unresolved_reloc = FALSE;
4418 break;
7b81dfbb
AJ
4419
4420 case R_X86_64_PLTOFF64:
4421 /* Relocation is PLT entry relative to GOT. For local
4422 symbols it's the symbol itself relative to GOT. */
eed180f8 4423 if (h != NULL
7b81dfbb
AJ
4424 /* See PLT32 handling. */
4425 && h->plt.offset != (bfd_vma) -1
6de2ae4a 4426 && htab->elf.splt != NULL)
7b81dfbb 4427 {
0ff2b86e
L
4428 if (htab->plt_bnd != NULL)
4429 {
4430 resolved_plt = htab->plt_bnd;
4431 plt_offset = eh->plt_bnd.offset;
4432 }
4433 else
4434 {
4435 resolved_plt = htab->elf.splt;
4436 plt_offset = h->plt.offset;
4437 }
4438
4439 relocation = (resolved_plt->output_section->vma
4440 + resolved_plt->output_offset
4441 + plt_offset);
7b81dfbb
AJ
4442 unresolved_reloc = FALSE;
4443 }
4444
6de2ae4a
L
4445 relocation -= htab->elf.sgotplt->output_section->vma
4446 + htab->elf.sgotplt->output_offset;
7b81dfbb 4447 break;
d6ab8113 4448
70256ad8 4449 case R_X86_64_PLT32:
c3320543 4450 case R_X86_64_PLT32_BND:
70256ad8
AJ
4451 /* Relocation is to the entry for this symbol in the
4452 procedure linkage table. */
4453
4454 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 4455 without using the procedure linkage table. */
70256ad8
AJ
4456 if (h == NULL)
4457 break;
4458
dd7e64d4
L
4459 if ((h->plt.offset == (bfd_vma) -1
4460 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 4461 || htab->elf.splt == NULL)
70256ad8
AJ
4462 {
4463 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ
4464 happens when statically linking PIC code, or when
4465 using -Bsymbolic. */
70256ad8
AJ
4466 break;
4467 }
4468
dd7e64d4 4469 if (h->plt.offset != (bfd_vma) -1)
0ff2b86e 4470 {
dd7e64d4
L
4471 if (htab->plt_bnd != NULL)
4472 {
4473 resolved_plt = htab->plt_bnd;
4474 plt_offset = eh->plt_bnd.offset;
4475 }
4476 else
4477 {
4478 resolved_plt = htab->elf.splt;
4479 plt_offset = h->plt.offset;
4480 }
0ff2b86e
L
4481 }
4482 else
4483 {
dd7e64d4
L
4484 /* Use the GOT PLT. */
4485 resolved_plt = htab->plt_got;
4486 plt_offset = eh->plt_got.offset;
0ff2b86e
L
4487 }
4488
4489 relocation = (resolved_plt->output_section->vma
4490 + resolved_plt->output_offset
4491 + plt_offset);
b34976b6 4492 unresolved_reloc = FALSE;
70256ad8
AJ
4493 break;
4494
1788fc08
L
4495 case R_X86_64_SIZE32:
4496 case R_X86_64_SIZE64:
1788fc08
L
4497 /* Set to symbol size. */
4498 relocation = st_size;
4499 goto direct;
4500
fd8ab9e5
AJ
4501 case R_X86_64_PC8:
4502 case R_X86_64_PC16:
4503 case R_X86_64_PC32:
c3320543 4504 case R_X86_64_PC32_BND:
6333bc0d
L
4505 /* Don't complain about -fPIC if the symbol is undefined when
4506 building executable. */
0e1862bb 4507 if (bfd_link_pic (info)
ba3bee0b 4508 && (input_section->flags & SEC_ALLOC) != 0
90f487df 4509 && (input_section->flags & SEC_READONLY) != 0
6333bc0d 4510 && h != NULL
0e1862bb 4511 && !(bfd_link_executable (info)
6333bc0d 4512 && h->root.type == bfd_link_hash_undefined))
6610a52d 4513 {
41bed6dd
L
4514 bfd_boolean fail = FALSE;
4515 bfd_boolean branch
c3320543
L
4516 = ((r_type == R_X86_64_PC32
4517 || r_type == R_X86_64_PC32_BND)
41bed6dd
L
4518 && is_32bit_relative_branch (contents, rel->r_offset));
4519
4520 if (SYMBOL_REFERENCES_LOCAL (info, h))
4521 {
4522 /* Symbol is referenced locally. Make sure it is
4523 defined locally or for a branch. */
4524 fail = !h->def_regular && !branch;
4525 }
0e1862bb 4526 else if (!(bfd_link_executable (info)
bc696fd5 4527 && (h->needs_copy || eh->needs_copy)))
41bed6dd 4528 {
9a926d55
L
4529 /* Symbol doesn't need copy reloc and isn't referenced
4530 locally. We only allow branch to symbol with
4531 non-default visibility. */
41bed6dd
L
4532 fail = (!branch
4533 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
4534 }
4535
4536 if (fail)
4537 {
4538 const char *fmt;
4539 const char *v;
4540 const char *pic = "";
4541
4542 switch (ELF_ST_VISIBILITY (h->other))
4543 {
4544 case STV_HIDDEN:
4545 v = _("hidden symbol");
4546 break;
4547 case STV_INTERNAL:
4548 v = _("internal symbol");
4549 break;
4550 case STV_PROTECTED:
4551 v = _("protected symbol");
4552 break;
4553 default:
4554 v = _("symbol");
4555 pic = _("; recompile with -fPIC");
4556 break;
4557 }
4558
4559 if (h->def_regular)
4560 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4561 else
4562 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4563
4564 (*_bfd_error_handler) (fmt, input_bfd,
4565 x86_64_elf_howto_table[r_type].name,
4566 v, h->root.root.string, pic);
4567 bfd_set_error (bfd_error_bad_value);
4568 return FALSE;
4569 }
6610a52d
L
4570 }
4571 /* Fall through. */
4572
70256ad8
AJ
4573 case R_X86_64_8:
4574 case R_X86_64_16:
4575 case R_X86_64_32:
d6ab8113 4576 case R_X86_64_PC64:
6b3db546 4577 case R_X86_64_64:
80643fbc 4578 /* FIXME: The ABI says the linker should make sure the value is
407443a3 4579 the same when it's zeroextended to 64 bit. */
c434dee6 4580
1788fc08 4581direct:
b1e24c02 4582 if ((input_section->flags & SEC_ALLOC) == 0)
c434dee6
AJ
4583 break;
4584
9a926d55 4585 /* Don't copy a pc-relative relocation into the output file
6333bc0d 4586 if the symbol needs copy reloc or the symbol is undefined
04ebc307
L
4587 when building executable. Copy dynamic function pointer
4588 relocations. */
0e1862bb
L
4589 if ((bfd_link_pic (info)
4590 && !(bfd_link_executable (info)
fd9edc90 4591 && h != NULL
6333bc0d
L
4592 && (h->needs_copy
4593 || eh->needs_copy
4594 || h->root.type == bfd_link_hash_undefined)
9a926d55 4595 && IS_X86_64_PCREL_TYPE (r_type))
4bc6e03a
AJ
4596 && (h == NULL
4597 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4598 || h->root.type != bfd_link_hash_undefweak)
1788fc08
L
4599 && ((! IS_X86_64_PCREL_TYPE (r_type)
4600 && r_type != R_X86_64_SIZE32
4601 && r_type != R_X86_64_SIZE64)
d8045f23 4602 || ! SYMBOL_CALLS_LOCAL (info, h)))
d40d037c 4603 || (ELIMINATE_COPY_RELOCS
0e1862bb 4604 && !bfd_link_pic (info)
c434dee6
AJ
4605 && h != NULL
4606 && h->dynindx != -1
04ebc307 4607 && (!h->non_got_ref || eh->func_pointer_refcount > 0)
f5385ebf
AM
4608 && ((h->def_dynamic
4609 && !h->def_regular)
c434dee6 4610 || h->root.type == bfd_link_hash_undefweak
0f88be7a 4611 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ
4612 {
4613 Elf_Internal_Rela outrel;
b34976b6 4614 bfd_boolean skip, relocate;
c434dee6 4615 asection *sreloc;
70256ad8
AJ
4616
4617 /* When generating a shared object, these relocations
4618 are copied into the output file to be resolved at run
407443a3 4619 time. */
b34976b6
AM
4620 skip = FALSE;
4621 relocate = FALSE;
70256ad8 4622
c629eae0
JJ
4623 outrel.r_offset =
4624 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 4625 rel->r_offset);
c629eae0 4626 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 4627 skip = TRUE;
0fb19cbc 4628 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 4629 skip = TRUE, relocate = TRUE;
70256ad8
AJ
4630
4631 outrel.r_offset += (input_section->output_section->vma
4632 + input_section->output_offset);
4633
4634 if (skip)
0bb2d96a 4635 memset (&outrel, 0, sizeof outrel);
c434dee6 4636
fd8ab9e5
AJ
4637 /* h->dynindx may be -1 if this symbol was marked to
4638 become local. */
4639 else if (h != NULL
c434dee6 4640 && h->dynindx != -1
d8045f23 4641 && (IS_X86_64_PCREL_TYPE (r_type)
0e1862bb 4642 || ! bfd_link_pic (info)
d8045f23
NC
4643 || ! SYMBOLIC_BIND (info, h)
4644 || ! h->def_regular))
70256ad8 4645 {
351f65ca 4646 outrel.r_info = htab->r_info (h->dynindx, r_type);
c434dee6 4647 outrel.r_addend = rel->r_addend;
70256ad8
AJ
4648 }
4649 else
4650 {
c434dee6 4651 /* This symbol is local, or marked to become local. */
248775ba 4652 if (r_type == htab->pointer_r_type)
607c0e09 4653 {
b34976b6 4654 relocate = TRUE;
351f65ca 4655 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
607c0e09
AS
4656 outrel.r_addend = relocation + rel->r_addend;
4657 }
64d25c44
L
4658 else if (r_type == R_X86_64_64
4659 && !ABI_64_P (output_bfd))
4660 {
4661 relocate = TRUE;
4662 outrel.r_info = htab->r_info (0,
4663 R_X86_64_RELATIVE64);
4664 outrel.r_addend = relocation + rel->r_addend;
8cf0d2dd
L
4665 /* Check addend overflow. */
4666 if ((outrel.r_addend & 0x80000000)
4667 != (rel->r_addend & 0x80000000))
4668 {
4669 const char *name;
268a8d3a 4670 int addend = rel->r_addend;
8cf0d2dd
L
4671 if (h && h->root.root.string)
4672 name = h->root.root.string;
4673 else
4674 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4675 sym, NULL);
6f2c9068
L
4676 if (addend < 0)
4677 (*_bfd_error_handler)
268a8d3a 4678 (_("%B: addend -0x%x in relocation %s against "
6f2c9068
L
4679 "symbol `%s' at 0x%lx in section `%A' is "
4680 "out of range"),
4681 input_bfd, input_section, addend,
4682 x86_64_elf_howto_table[r_type].name,
4683 name, (unsigned long) rel->r_offset);
4684 else
4685 (*_bfd_error_handler)
268a8d3a 4686 (_("%B: addend 0x%x in relocation %s against "
6f2c9068
L
4687 "symbol `%s' at 0x%lx in section `%A' is "
4688 "out of range"),
4689 input_bfd, input_section, addend,
4690 x86_64_elf_howto_table[r_type].name,
4691 name, (unsigned long) rel->r_offset);
8cf0d2dd
L
4692 bfd_set_error (bfd_error_bad_value);
4693 return FALSE;
4694 }
64d25c44 4695 }
607c0e09
AS
4696 else
4697 {
4698 long sindx;
4699
8517fae7 4700 if (bfd_is_abs_section (sec))
607c0e09
AS
4701 sindx = 0;
4702 else if (sec == NULL || sec->owner == NULL)
4703 {
4704 bfd_set_error (bfd_error_bad_value);
b34976b6 4705 return FALSE;
607c0e09
AS
4706 }
4707 else
4708 {
4709 asection *osec;
4710
74541ad4
AM
4711 /* We are turning this relocation into one
4712 against a section symbol. It would be
4713 proper to subtract the symbol's value,
4714 osec->vma, from the emitted reloc addend,
4715 but ld.so expects buggy relocs. */
607c0e09
AS
4716 osec = sec->output_section;
4717 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM
4718 if (sindx == 0)
4719 {
4720 asection *oi = htab->elf.text_index_section;
4721 sindx = elf_section_data (oi)->dynindx;
4722 }
4723 BFD_ASSERT (sindx != 0);
607c0e09
AS
4724 }
4725
351f65ca 4726 outrel.r_info = htab->r_info (sindx, r_type);
607c0e09
AS
4727 outrel.r_addend = relocation + rel->r_addend;
4728 }
70256ad8
AJ
4729 }
4730
cbe950e9 4731 sreloc = elf_section_data (input_section)->sreloc;
d8045f23 4732
62d78908
L
4733 if (sreloc == NULL || sreloc->contents == NULL)
4734 {
4735 r = bfd_reloc_notsupported;
4736 goto check_relocation_error;
4737 }
c434dee6 4738
351f65ca 4739 elf_append_rela (output_bfd, sreloc, &outrel);
70256ad8
AJ
4740
4741 /* If this reloc is against an external symbol, we do
4742 not want to fiddle with the addend. Otherwise, we
4743 need to include the symbol value so that it becomes
4744 an addend for the dynamic reloc. */
0f88be7a 4745 if (! relocate)
70256ad8
AJ
4746 continue;
4747 }
4748
4749 break;
4750
bffbf940 4751 case R_X86_64_TLSGD:
67a4f2b7
AO
4752 case R_X86_64_GOTPC32_TLSDESC:
4753 case R_X86_64_TLSDESC_CALL:
bffbf940 4754 case R_X86_64_GOTTPOFF:
bffbf940
JJ
4755 tls_type = GOT_UNKNOWN;
4756 if (h == NULL && local_got_offsets)
351f65ca 4757 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
bffbf940 4758 else if (h != NULL)
351f65ca 4759 tls_type = elf_x86_64_hash_entry (h)->tls_type;
142411ca 4760
351f65ca
L
4761 if (! elf_x86_64_tls_transition (info, input_bfd,
4762 input_section, contents,
4763 symtab_hdr, sym_hashes,
4764 &r_type, tls_type, rel,
4765 relend, h, r_symndx))
534a31f6 4766 return FALSE;
bffbf940
JJ
4767
4768 if (r_type == R_X86_64_TPOFF32)
4769 {
142411ca
L
4770 bfd_vma roff = rel->r_offset;
4771
bffbf940 4772 BFD_ASSERT (! unresolved_reloc);
142411ca 4773
351f65ca 4774 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
bffbf940 4775 {
52bc799a 4776 /* GD->LE transition. For 64bit, change
abcf1d52 4777 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
a3fadc9a 4778 .word 0x6666; rex64; call __tls_get_addr
52bc799a 4779 into:
bffbf940 4780 movq %fs:0, %rax
52bc799a
L
4781 leaq foo@tpoff(%rax), %rax
4782 For 32bit, change
4783 leaq foo@tlsgd(%rip), %rdi
4784 .word 0x6666; rex64; call __tls_get_addr
4785 into:
4786 movl %fs:0, %eax
5c98a14e
JJ
4787 leaq foo@tpoff(%rax), %rax
4788 For largepic, change:
4789 leaq foo@tlsgd(%rip), %rdi
4790 movabsq $__tls_get_addr@pltoff, %rax
4791 addq %rbx, %rax
4792 call *%rax
4793 into:
4794 movq %fs:0, %rax
4795 leaq foo@tpoff(%rax), %rax
4796 nopw 0x0(%rax,%rax,1) */
4797 int largepic = 0;
4798 if (ABI_64_P (output_bfd)
4799 && contents[roff + 5] == (bfd_byte) '\xb8')
4800 {
4801 memcpy (contents + roff - 3,
4802 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4803 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4804 largepic = 1;
4805 }
4806 else if (ABI_64_P (output_bfd))
52bc799a
L
4807 memcpy (contents + roff - 4,
4808 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4809 16);
4810 else
4811 memcpy (contents + roff - 3,
4812 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4813 15);
eb4ff4d6 4814 bfd_put_32 (output_bfd,
351f65ca 4815 elf_x86_64_tpoff (info, relocation),
5c98a14e
JJ
4816 contents + roff + 8 + largepic);
4817 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
bffbf940 4818 rel++;
60f2e42e 4819 wrel++;
bffbf940
JJ
4820 continue;
4821 }
351f65ca 4822 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
67a4f2b7
AO
4823 {
4824 /* GDesc -> LE transition.
4825 It's originally something like:
4826 leaq x@tlsdesc(%rip), %rax
4827
4828 Change it to:
c9736ba0 4829 movl $x@tpoff, %rax. */
67a4f2b7 4830
c9736ba0 4831 unsigned int val, type;
67a4f2b7 4832
67a4f2b7 4833 type = bfd_get_8 (input_bfd, contents + roff - 3);
67a4f2b7 4834 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO
4835 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
4836 contents + roff - 3);
4837 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
4838 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4839 contents + roff - 1);
eb4ff4d6 4840 bfd_put_32 (output_bfd,
351f65ca 4841 elf_x86_64_tpoff (info, relocation),
67a4f2b7
AO
4842 contents + roff);
4843 continue;
4844 }
351f65ca 4845 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
67a4f2b7
AO
4846 {
4847 /* GDesc -> LE transition.
4848 It's originally:
4849 call *(%rax)
4850 Turn it into:
142411ca 4851 xchg %ax,%ax. */
10efb593 4852 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO
4853 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4854 continue;
4855 }
351f65ca 4856 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
bffbf940 4857 {
bffbf940 4858 /* IE->LE transition:
cf61b747 4859 For 64bit, originally it can be one of:
bffbf940
JJ
4860 movq foo@gottpoff(%rip), %reg
4861 addq foo@gottpoff(%rip), %reg
4862 We change it into:
4863 movq $foo, %reg
4864 leaq foo(%reg), %reg
cf61b747
L
4865 addq $foo, %reg.
4866 For 32bit, originally it can be one of:
4867 movq foo@gottpoff(%rip), %reg
4868 addl foo@gottpoff(%rip), %reg
4869 We change it into:
4870 movq $foo, %reg
4871 leal foo(%reg), %reg
4872 addl $foo, %reg. */
142411ca
L
4873
4874 unsigned int val, type, reg;
4875
cf61b747
L
4876 if (roff >= 3)
4877 val = bfd_get_8 (input_bfd, contents + roff - 3);
4878 else
4879 val = 0;
142411ca
L
4880 type = bfd_get_8 (input_bfd, contents + roff - 2);
4881 reg = bfd_get_8 (input_bfd, contents + roff - 1);
bffbf940 4882 reg >>= 3;
bffbf940
JJ
4883 if (type == 0x8b)
4884 {
4885 /* movq */
4886 if (val == 0x4c)
4887 bfd_put_8 (output_bfd, 0x49,
142411ca 4888 contents + roff - 3);
4a4c5f25
L
4889 else if (!ABI_64_P (output_bfd) && val == 0x44)
4890 bfd_put_8 (output_bfd, 0x41,
4891 contents + roff - 3);
bffbf940 4892 bfd_put_8 (output_bfd, 0xc7,
142411ca 4893 contents + roff - 2);
bffbf940 4894 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4895 contents + roff - 1);
bffbf940
JJ
4896 }
4897 else if (reg == 4)
4898 {
cf61b747
L
4899 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4900 is special */
bffbf940
JJ
4901 if (val == 0x4c)
4902 bfd_put_8 (output_bfd, 0x49,
142411ca 4903 contents + roff - 3);
4a4c5f25
L
4904 else if (!ABI_64_P (output_bfd) && val == 0x44)
4905 bfd_put_8 (output_bfd, 0x41,
4906 contents + roff - 3);
bffbf940 4907 bfd_put_8 (output_bfd, 0x81,
142411ca 4908 contents + roff - 2);
bffbf940 4909 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4910 contents + roff - 1);
bffbf940
JJ
4911 }
4912 else
4913 {
cf61b747 4914 /* addq/addl -> leaq/leal */
bffbf940
JJ
4915 if (val == 0x4c)
4916 bfd_put_8 (output_bfd, 0x4d,
142411ca 4917 contents + roff - 3);
4a4c5f25
L
4918 else if (!ABI_64_P (output_bfd) && val == 0x44)
4919 bfd_put_8 (output_bfd, 0x45,
4920 contents + roff - 3);
bffbf940 4921 bfd_put_8 (output_bfd, 0x8d,
142411ca 4922 contents + roff - 2);
bffbf940 4923 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
142411ca 4924 contents + roff - 1);
bffbf940 4925 }
eb4ff4d6 4926 bfd_put_32 (output_bfd,
351f65ca 4927 elf_x86_64_tpoff (info, relocation),
142411ca 4928 contents + roff);
bffbf940
JJ
4929 continue;
4930 }
142411ca
L
4931 else
4932 BFD_ASSERT (FALSE);
bffbf940
JJ
4933 }
4934
6de2ae4a 4935 if (htab->elf.sgot == NULL)
bffbf940
JJ
4936 abort ();
4937
4938 if (h != NULL)
67a4f2b7
AO
4939 {
4940 off = h->got.offset;
351f65ca 4941 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
67a4f2b7 4942 }
bffbf940
JJ
4943 else
4944 {
4945 if (local_got_offsets == NULL)
4946 abort ();
4947
4948 off = local_got_offsets[r_symndx];
67a4f2b7 4949 offplt = local_tlsdesc_gotents[r_symndx];
bffbf940
JJ
4950 }
4951
4952 if ((off & 1) != 0)
4953 off &= ~1;
26e41594 4954 else
bffbf940
JJ
4955 {
4956 Elf_Internal_Rela outrel;
bffbf940 4957 int dr_type, indx;
67a4f2b7 4958 asection *sreloc;
bffbf940 4959
6de2ae4a 4960 if (htab->elf.srelgot == NULL)
bffbf940
JJ
4961 abort ();
4962
67a4f2b7
AO
4963 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4964
4965 if (GOT_TLS_GDESC_P (tls_type))
4966 {
351f65ca 4967 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
67a4f2b7 4968 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
6de2ae4a
L
4969 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4970 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4971 + htab->elf.sgotplt->output_offset
67a4f2b7
AO
4972 + offplt
4973 + htab->sgotplt_jump_table_size);
6de2ae4a 4974 sreloc = htab->elf.srelplt;
67a4f2b7 4975 if (indx == 0)
351f65ca 4976 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
67a4f2b7
AO
4977 else
4978 outrel.r_addend = 0;
351f65ca 4979 elf_append_rela (output_bfd, sreloc, &outrel);
67a4f2b7
AO
4980 }
4981
6de2ae4a 4982 sreloc = htab->elf.srelgot;
67a4f2b7 4983
6de2ae4a
L
4984 outrel.r_offset = (htab->elf.sgot->output_section->vma
4985 + htab->elf.sgot->output_offset + off);
bffbf940 4986
67a4f2b7 4987 if (GOT_TLS_GD_P (tls_type))
bffbf940 4988 dr_type = R_X86_64_DTPMOD64;
67a4f2b7
AO
4989 else if (GOT_TLS_GDESC_P (tls_type))
4990 goto dr_done;
bffbf940
JJ
4991 else
4992 dr_type = R_X86_64_TPOFF64;
4993
6de2ae4a 4994 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
bffbf940 4995 outrel.r_addend = 0;
67a4f2b7
AO
4996 if ((dr_type == R_X86_64_TPOFF64
4997 || dr_type == R_X86_64_TLSDESC) && indx == 0)
351f65ca
L
4998 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4999 outrel.r_info = htab->r_info (indx, dr_type);
bffbf940 5000
351f65ca 5001 elf_append_rela (output_bfd, sreloc, &outrel);
bffbf940 5002
67a4f2b7 5003 if (GOT_TLS_GD_P (tls_type))
bffbf940
JJ
5004 {
5005 if (indx == 0)
5006 {
d40d037c 5007 BFD_ASSERT (! unresolved_reloc);
bffbf940 5008 bfd_put_64 (output_bfd,
351f65ca 5009 relocation - elf_x86_64_dtpoff_base (info),
6de2ae4a 5010 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
bffbf940
JJ
5011 }
5012 else
5013 {
5014 bfd_put_64 (output_bfd, 0,
6de2ae4a 5015 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 5016 outrel.r_info = htab->r_info (indx,
bffbf940
JJ
5017 R_X86_64_DTPOFF64);
5018 outrel.r_offset += GOT_ENTRY_SIZE;
351f65ca 5019 elf_append_rela (output_bfd, sreloc,
464d3bd4 5020 &outrel);
bffbf940
JJ
5021 }
5022 }
5023
67a4f2b7 5024 dr_done:
bffbf940
JJ
5025 if (h != NULL)
5026 h->got.offset |= 1;
5027 else
5028 local_got_offsets[r_symndx] |= 1;
5029 }
5030
67a4f2b7
AO
5031 if (off >= (bfd_vma) -2
5032 && ! GOT_TLS_GDESC_P (tls_type))
bffbf940 5033 abort ();
351f65ca 5034 if (r_type == ELF32_R_TYPE (rel->r_info))
bffbf940 5035 {
67a4f2b7
AO
5036 if (r_type == R_X86_64_GOTPC32_TLSDESC
5037 || r_type == R_X86_64_TLSDESC_CALL)
6de2ae4a
L
5038 relocation = htab->elf.sgotplt->output_section->vma
5039 + htab->elf.sgotplt->output_offset
67a4f2b7
AO
5040 + offplt + htab->sgotplt_jump_table_size;
5041 else
6de2ae4a
L
5042 relocation = htab->elf.sgot->output_section->vma
5043 + htab->elf.sgot->output_offset + off;
b34976b6 5044 unresolved_reloc = FALSE;
bffbf940 5045 }
142411ca 5046 else
67a4f2b7 5047 {
142411ca 5048 bfd_vma roff = rel->r_offset;
67a4f2b7 5049
351f65ca 5050 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
142411ca 5051 {
52bc799a 5052 /* GD->IE transition. For 64bit, change
142411ca
L
5053 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5054 .word 0x6666; rex64; call __tls_get_addr@plt
52bc799a 5055 into:
142411ca 5056 movq %fs:0, %rax
52bc799a
L
5057 addq foo@gottpoff(%rip), %rax
5058 For 32bit, change
5059 leaq foo@tlsgd(%rip), %rdi
5060 .word 0x6666; rex64; call __tls_get_addr@plt
5061 into:
5062 movl %fs:0, %eax
5c98a14e
JJ
5063 addq foo@gottpoff(%rip), %rax
5064 For largepic, change:
5065 leaq foo@tlsgd(%rip), %rdi
5066 movabsq $__tls_get_addr@pltoff, %rax
5067 addq %rbx, %rax
5068 call *%rax
5069 into:
5070 movq %fs:0, %rax
5071 addq foo@gottpoff(%rax), %rax
5072 nopw 0x0(%rax,%rax,1) */
5073 int largepic = 0;
5074 if (ABI_64_P (output_bfd)
5075 && contents[roff + 5] == (bfd_byte) '\xb8')
5076 {
5077 memcpy (contents + roff - 3,
5078 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
5079 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5080 largepic = 1;
5081 }
5082 else if (ABI_64_P (output_bfd))
52bc799a
L
5083 memcpy (contents + roff - 4,
5084 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5085 16);
5086 else
5087 memcpy (contents + roff - 3,
5088 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5089 15);
142411ca 5090
6de2ae4a
L
5091 relocation = (htab->elf.sgot->output_section->vma
5092 + htab->elf.sgot->output_offset + off
142411ca 5093 - roff
5c98a14e 5094 - largepic
142411ca
L
5095 - input_section->output_section->vma
5096 - input_section->output_offset
5097 - 12);
5098 bfd_put_32 (output_bfd, relocation,
5c98a14e
JJ
5099 contents + roff + 8 + largepic);
5100 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
142411ca 5101 rel++;
60f2e42e 5102 wrel++;
142411ca
L
5103 continue;
5104 }
351f65ca 5105 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
142411ca
L
5106 {
5107 /* GDesc -> IE transition.
5108 It's originally something like:
5109 leaq x@tlsdesc(%rip), %rax
67a4f2b7 5110
142411ca 5111 Change it to:
c9736ba0 5112 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
67a4f2b7 5113
142411ca
L
5114 /* Now modify the instruction as appropriate. To
5115 turn a leaq into a movq in the form we use it, it
5116 suffices to change the second byte from 0x8d to
5117 0x8b. */
5118 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5119
5120 bfd_put_32 (output_bfd,
6de2ae4a
L
5121 htab->elf.sgot->output_section->vma
5122 + htab->elf.sgot->output_offset + off
142411ca
L
5123 - rel->r_offset
5124 - input_section->output_section->vma
5125 - input_section->output_offset
5126 - 4,
5127 contents + roff);
5128 continue;
5129 }
351f65ca 5130 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
142411ca
L
5131 {
5132 /* GDesc -> IE transition.
5133 It's originally:
5134 call *(%rax)
5135
5136 Change it to:
c9736ba0 5137 xchg %ax, %ax. */
142411ca 5138
142411ca
L
5139 bfd_put_8 (output_bfd, 0x66, contents + roff);
5140 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5141 continue;
5142 }
5143 else
5144 BFD_ASSERT (FALSE);
67a4f2b7 5145 }
bffbf940
JJ
5146 break;
5147
5148 case R_X86_64_TLSLD:
351f65ca
L
5149 if (! elf_x86_64_tls_transition (info, input_bfd,
5150 input_section, contents,
5151 symtab_hdr, sym_hashes,
5152 &r_type, GOT_UNKNOWN,
5153 rel, relend, h, r_symndx))
142411ca 5154 return FALSE;
a3fadc9a 5155
142411ca
L
5156 if (r_type != R_X86_64_TLSLD)
5157 {
bffbf940 5158 /* LD->LE transition:
a3fadc9a 5159 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
52bc799a
L
5160 For 64bit, we change it into:
5161 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
5162 For 32bit, we change it into:
5c98a14e
JJ
5163 nopl 0x0(%rax); movl %fs:0, %eax.
5164 For largepic, change:
5165 leaq foo@tlsgd(%rip), %rdi
5166 movabsq $__tls_get_addr@pltoff, %rax
5167 addq %rbx, %rax
5168 call *%rax
5169 into:
5170 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
5171 movq %fs:0, %eax */
142411ca
L
5172
5173 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5c98a14e
JJ
5174 if (ABI_64_P (output_bfd)
5175 && contents[rel->r_offset + 5] == (bfd_byte) '\xb8')
5176 memcpy (contents + rel->r_offset - 3,
5177 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5178 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5179 else if (ABI_64_P (output_bfd))
52bc799a
L
5180 memcpy (contents + rel->r_offset - 3,
5181 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5182 else
5183 memcpy (contents + rel->r_offset - 3,
5184 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5c98a14e 5185 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
bffbf940 5186 rel++;
60f2e42e 5187 wrel++;
bffbf940
JJ
5188 continue;
5189 }
5190
6de2ae4a 5191 if (htab->elf.sgot == NULL)
bffbf940
JJ
5192 abort ();
5193
5194 off = htab->tls_ld_got.offset;
5195 if (off & 1)
5196 off &= ~1;
5197 else
5198 {
5199 Elf_Internal_Rela outrel;
bffbf940 5200
6de2ae4a 5201 if (htab->elf.srelgot == NULL)
bffbf940
JJ
5202 abort ();
5203
6de2ae4a
L
5204 outrel.r_offset = (htab->elf.sgot->output_section->vma
5205 + htab->elf.sgot->output_offset + off);
bffbf940
JJ
5206
5207 bfd_put_64 (output_bfd, 0,
6de2ae4a 5208 htab->elf.sgot->contents + off);
bffbf940 5209 bfd_put_64 (output_bfd, 0,
6de2ae4a 5210 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 5211 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
bffbf940 5212 outrel.r_addend = 0;
351f65ca 5213 elf_append_rela (output_bfd, htab->elf.srelgot,
464d3bd4 5214 &outrel);
bffbf940
JJ
5215 htab->tls_ld_got.offset |= 1;
5216 }
6de2ae4a
L
5217 relocation = htab->elf.sgot->output_section->vma
5218 + htab->elf.sgot->output_offset + off;
b34976b6 5219 unresolved_reloc = FALSE;
bffbf940
JJ
5220 break;
5221
5222 case R_X86_64_DTPOFF32:
0e1862bb
L
5223 if (!bfd_link_executable (info)
5224 || (input_section->flags & SEC_CODE) == 0)
351f65ca 5225 relocation -= elf_x86_64_dtpoff_base (info);
bffbf940 5226 else
351f65ca 5227 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ
5228 break;
5229
5230 case R_X86_64_TPOFF32:
6769d501 5231 case R_X86_64_TPOFF64:
0e1862bb 5232 BFD_ASSERT (bfd_link_executable (info));
351f65ca 5233 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ
5234 break;
5235
a69ed7f7
L
5236 case R_X86_64_DTPOFF64:
5237 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
5238 relocation -= elf_x86_64_dtpoff_base (info);
5239 break;
5240
70256ad8
AJ
5241 default:
5242 break;
5243 }
8d88c4ca 5244
239e1f3a
AM
5245 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5246 because such sections are not SEC_ALLOC and thus ld.so will
5247 not process them. */
c434dee6 5248 if (unresolved_reloc
239e1f3a 5249 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM
5250 && h->def_dynamic)
5251 && _bfd_elf_section_offset (output_bfd, info, input_section,
5252 rel->r_offset) != (bfd_vma) -1)
a040981f
L
5253 {
5254 (*_bfd_error_handler)
5255 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5256 input_bfd,
5257 input_section,
5258 (long) rel->r_offset,
5259 howto->name,
5260 h->root.root.string);
5261 return FALSE;
5262 }
c434dee6 5263
cbe950e9 5264do_relocation:
8d88c4ca 5265 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ
5266 contents, rel->r_offset,
5267 relocation, rel->r_addend);
8d88c4ca 5268
62d78908 5269check_relocation_error:
8d88c4ca 5270 if (r != bfd_reloc_ok)
8da6118f 5271 {
c434dee6
AJ
5272 const char *name;
5273
5274 if (h != NULL)
5275 name = h->root.root.string;
5276 else
8da6118f 5277 {
c434dee6
AJ
5278 name = bfd_elf_string_from_elf_section (input_bfd,
5279 symtab_hdr->sh_link,
5280 sym->st_name);
5281 if (name == NULL)
b34976b6 5282 return FALSE;
c434dee6
AJ
5283 if (*name == '\0')
5284 name = bfd_section_name (input_bfd, sec);
5285 }
5286
5287 if (r == bfd_reloc_overflow)
5288 {
c434dee6 5289 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L
5290 (info, (h ? &h->root : NULL), name, howto->name,
5291 (bfd_vma) 0, input_bfd, input_section,
5292 rel->r_offset)))
b34976b6 5293 return FALSE;
c434dee6
AJ
5294 }
5295 else
5296 {
5297 (*_bfd_error_handler)
bb95161d 5298 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
d003868e 5299 input_bfd, input_section,
c434dee6 5300 (long) rel->r_offset, name, (int) r);
b34976b6 5301 return FALSE;
8da6118f
KH
5302 }
5303 }
60f2e42e
L
5304
5305 if (wrel != rel)
5306 *wrel = *rel;
5307 }
5308
5309 if (wrel != rel)
5310 {
5311 Elf_Internal_Shdr *rel_hdr;
5312 size_t deleted = rel - wrel;
5313
5314 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5315 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5316 if (rel_hdr->sh_size == 0)
5317 {
5318 /* It is too late to remove an empty reloc section. Leave
5319 one NONE reloc.
5320 ??? What is wrong with an empty section??? */
5321 rel_hdr->sh_size = rel_hdr->sh_entsize;
5322 deleted -= 1;
5323 }
5324 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5325 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5326 input_section->reloc_count -= deleted;
8d88c4ca 5327 }
70256ad8 5328
b34976b6 5329 return TRUE;
70256ad8
AJ
5330}
5331
5332/* Finish up dynamic symbol handling. We set the contents of various
5333 dynamic sections here. */
5334
b34976b6 5335static bfd_boolean
351f65ca
L
5336elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
5337 struct bfd_link_info *info,
5338 struct elf_link_hash_entry *h,
220cf809 5339 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
70256ad8 5340{
351f65ca 5341 struct elf_x86_64_link_hash_table *htab;
0ff2b86e
L
5342 const struct elf_x86_64_backend_data *abed;
5343 bfd_boolean use_plt_bnd;
dd7e64d4 5344 struct elf_x86_64_link_hash_entry *eh;
70256ad8 5345
351f65ca 5346 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
5347 if (htab == NULL)
5348 return FALSE;
70256ad8 5349
0ff2b86e
L
5350 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5351 section only if there is .plt section. */
5352 use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL;
5353 abed = (use_plt_bnd
5354 ? &elf_x86_64_bnd_arch_bed
5355 : get_elf_x86_64_backend_data (output_bfd));
5356
dd7e64d4
L
5357 eh = (struct elf_x86_64_link_hash_entry *) h;
5358
70256ad8
AJ
5359 if (h->plt.offset != (bfd_vma) -1)
5360 {
70256ad8 5361 bfd_vma plt_index;
0ff2b86e
L
5362 bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset;
5363 bfd_vma plt_plt_insn_end, plt_got_insn_size;
70256ad8 5364 Elf_Internal_Rela rela;
947216bf 5365 bfd_byte *loc;
0ff2b86e 5366 asection *plt, *gotplt, *relplt, *resolved_plt;
351f65ca 5367 const struct elf_backend_data *bed;
5974eba6 5368 bfd_vma plt_got_pcrel_offset;
cbe950e9
L
5369
5370 /* When building a static executable, use .iplt, .igot.plt and
5371 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 5372 if (htab->elf.splt != NULL)
cbe950e9 5373 {
6de2ae4a
L
5374 plt = htab->elf.splt;
5375 gotplt = htab->elf.sgotplt;
5376 relplt = htab->elf.srelplt;
cbe950e9
L
5377 }
5378 else
5379 {
6de2ae4a
L
5380 plt = htab->elf.iplt;
5381 gotplt = htab->elf.igotplt;
5382 relplt = htab->elf.irelplt;
cbe950e9 5383 }
70256ad8
AJ
5384
5385 /* This symbol has an entry in the procedure linkage table. Set
407443a3 5386 it up. */
cbe950e9 5387 if ((h->dynindx == -1
0e1862bb 5388 && !((h->forced_local || bfd_link_executable (info))
cbe950e9
L
5389 && h->def_regular
5390 && h->type == STT_GNU_IFUNC))
5391 || plt == NULL
5392 || gotplt == NULL
5393 || relplt == NULL)
cec7f46a 5394 abort ();
70256ad8
AJ
5395
5396 /* Get the index in the procedure linkage table which
5397 corresponds to this symbol. This is the index of this symbol
5398 in all the symbols for which we are making plt entries. The
cbe950e9 5399 first entry in the procedure linkage table is reserved.
6bbec505 5400
cbe950e9 5401 Get the offset into the .got table of the entry that
407443a3 5402 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
cbe950e9
L
5403 bytes. The first three are reserved for the dynamic linker.
5404
5405 For static executables, we don't reserve anything. */
5406
6de2ae4a 5407 if (plt == htab->elf.splt)
cbe950e9 5408 {
eed180f8 5409 got_offset = h->plt.offset / abed->plt_entry_size - 1;
e1f98742 5410 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
cbe950e9
L
5411 }
5412 else
5413 {
eed180f8 5414 got_offset = h->plt.offset / abed->plt_entry_size;
e1f98742 5415 got_offset = got_offset * GOT_ENTRY_SIZE;
cbe950e9 5416 }
70256ad8 5417
0ff2b86e
L
5418 plt_plt_insn_end = abed->plt_plt_insn_end;
5419 plt_plt_offset = abed->plt_plt_offset;
5420 plt_got_insn_size = abed->plt_got_insn_size;
5421 plt_got_offset = abed->plt_got_offset;
5422 if (use_plt_bnd)
5423 {
5424 /* Use the second PLT with BND relocations. */
5425 const bfd_byte *plt_entry, *plt2_entry;
0ff2b86e
L
5426
5427 if (eh->has_bnd_reloc)
5428 {
5429 plt_entry = elf_x86_64_bnd_plt_entry;
5430 plt2_entry = elf_x86_64_bnd_plt2_entry;
5431 }
5432 else
5433 {
5434 plt_entry = elf_x86_64_legacy_plt_entry;
5435 plt2_entry = elf_x86_64_legacy_plt2_entry;
5436
5437 /* Subtract 1 since there is no BND prefix. */
5438 plt_plt_insn_end -= 1;
5439 plt_plt_offset -= 1;
5440 plt_got_insn_size -= 1;
5441 plt_got_offset -= 1;
5442 }
5443
5444 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry)
5445 == sizeof (elf_x86_64_legacy_plt_entry));
5446
5447 /* Fill in the entry in the procedure linkage table. */
5448 memcpy (plt->contents + h->plt.offset,
5449 plt_entry, sizeof (elf_x86_64_legacy_plt_entry));
5450 /* Fill in the entry in the second PLT. */
5451 memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset,
5452 plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5453
5454 resolved_plt = htab->plt_bnd;
5455 plt_offset = eh->plt_bnd.offset;
5456 }
5457 else
5458 {
5459 /* Fill in the entry in the procedure linkage table. */
5460 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
5461 abed->plt_entry_size);
5462
5463 resolved_plt = plt;
5464 plt_offset = h->plt.offset;
5465 }
eed180f8
RM
5466
5467 /* Insert the relocation positions of the plt section. */
5468
5469 /* Put offset the PC-relative instruction referring to the GOT entry,
5470 subtracting the size of that instruction. */
ab7fede8
L
5471 plt_got_pcrel_offset = (gotplt->output_section->vma
5472 + gotplt->output_offset
5473 + got_offset
5474 - resolved_plt->output_section->vma
5475 - resolved_plt->output_offset
5476 - plt_offset
5477 - plt_got_insn_size);
5478
5479 /* Check PC-relative offset overflow in PLT entry. */
5974eba6 5480 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
ab7fede8
L
5481 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5482 output_bfd, h->root.root.string);
5483
5484 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
0ff2b86e 5485 resolved_plt->contents + plt_offset + plt_got_offset);
cbe950e9 5486
653165cc 5487 /* Fill in the entry in the global offset table, initially this
eed180f8 5488 points to the second part of the PLT entry. */
cbe950e9
L
5489 bfd_put_64 (output_bfd, (plt->output_section->vma
5490 + plt->output_offset
eed180f8 5491 + h->plt.offset + abed->plt_lazy_offset),
cbe950e9 5492 gotplt->contents + got_offset);
70256ad8
AJ
5493
5494 /* Fill in the entry in the .rela.plt section. */
cbe950e9
L
5495 rela.r_offset = (gotplt->output_section->vma
5496 + gotplt->output_offset
70256ad8 5497 + got_offset);
cbe950e9 5498 if (h->dynindx == -1
0e1862bb 5499 || ((bfd_link_executable (info)
cbe950e9
L
5500 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5501 && h->def_regular
5502 && h->type == STT_GNU_IFUNC))
5503 {
5504 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5505 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
351f65ca 5506 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
cbe950e9
L
5507 rela.r_addend = (h->root.u.def.value
5508 + h->root.u.def.section->output_section->vma
5509 + h->root.u.def.section->output_offset);
e1f98742
L
5510 /* R_X86_64_IRELATIVE comes last. */
5511 plt_index = htab->next_irelative_index--;
cbe950e9
L
5512 }
5513 else
5514 {
351f65ca 5515 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
cbe950e9 5516 rela.r_addend = 0;
e1f98742
L
5517 plt_index = htab->next_jump_slot_index++;
5518 }
5519
5520 /* Don't fill PLT entry for static executables. */
5521 if (plt == htab->elf.splt)
5522 {
35a14c6b
L
5523 bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end;
5524
e1f98742
L
5525 /* Put relocation index. */
5526 bfd_put_32 (output_bfd, plt_index,
eed180f8 5527 plt->contents + h->plt.offset + abed->plt_reloc_offset);
35a14c6b
L
5528
5529 /* Put offset for jmp .PLT0 and check for overflow. We don't
5530 check relocation index for overflow since branch displacement
5531 will overflow first. */
5532 if (plt0_offset > 0x80000000)
5533 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5534 output_bfd, h->root.root.string);
5535 bfd_put_32 (output_bfd, - plt0_offset,
0ff2b86e 5536 plt->contents + h->plt.offset + plt_plt_offset);
cbe950e9 5537 }
351f65ca
L
5538
5539 bed = get_elf_backend_data (output_bfd);
5540 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
82e96e07 5541 bed->s->swap_reloca_out (output_bfd, &rela, loc);
dd7e64d4
L
5542 }
5543 else if (eh->plt_got.offset != (bfd_vma) -1)
5544 {
5545 bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size;
5546 asection *plt, *got;
5547 bfd_boolean got_after_plt;
5548 int32_t got_pcrel_offset;
5549 const bfd_byte *got_plt_entry;
5550
5551 /* Set the entry in the GOT procedure linkage table. */
5552 plt = htab->plt_got;
5553 got = htab->elf.sgot;
5554 got_offset = h->got.offset;
5555
5556 if (got_offset == (bfd_vma) -1
5557 || h->type == STT_GNU_IFUNC
5558 || plt == NULL
5559 || got == NULL)
5560 abort ();
70256ad8 5561
dd7e64d4
L
5562 /* Use the second PLT entry template for the GOT PLT since they
5563 are the identical. */
5564 plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size;
5565 plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset;
5566 if (eh->has_bnd_reloc)
5567 got_plt_entry = elf_x86_64_bnd_plt2_entry;
5568 else
70256ad8 5569 {
dd7e64d4
L
5570 got_plt_entry = elf_x86_64_legacy_plt2_entry;
5571
5572 /* Subtract 1 since there is no BND prefix. */
5573 plt_got_insn_size -= 1;
5574 plt_got_offset -= 1;
70256ad8 5575 }
dd7e64d4
L
5576
5577 /* Fill in the entry in the GOT procedure linkage table. */
5578 plt_offset = eh->plt_got.offset;
5579 memcpy (plt->contents + plt_offset,
5580 got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5581
5582 /* Put offset the PC-relative instruction referring to the GOT
5583 entry, subtracting the size of that instruction. */
5584 got_pcrel_offset = (got->output_section->vma
5585 + got->output_offset
5586 + got_offset
5587 - plt->output_section->vma
5588 - plt->output_offset
5589 - plt_offset
5590 - plt_got_insn_size);
5591
5592 /* Check PC-relative offset overflow in GOT PLT entry. */
5593 got_after_plt = got->output_section->vma > plt->output_section->vma;
5594 if ((got_after_plt && got_pcrel_offset < 0)
5595 || (!got_after_plt && got_pcrel_offset > 0))
5596 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5597 output_bfd, h->root.root.string);
5598
5599 bfd_put_32 (output_bfd, got_pcrel_offset,
5600 plt->contents + plt_offset + plt_got_offset);
5601 }
5602
5603 if (!h->def_regular
5604 && (h->plt.offset != (bfd_vma) -1
5605 || eh->plt_got.offset != (bfd_vma) -1))
5606 {
5607 /* Mark the symbol as undefined, rather than as defined in
5608 the .plt section. Leave the value if there were any
5609 relocations where pointer equality matters (this is a clue
5610 for the dynamic linker, to make function pointer
5611 comparisons work between an application and shared
5612 library), otherwise set it to zero. If a function is only
5613 called from a binary, there is no need to slow down
5614 shared libraries because of that. */
5615 sym->st_shndx = SHN_UNDEF;
5616 if (!h->pointer_equality_needed)
5617 sym->st_value = 0;
70256ad8
AJ
5618 }
5619
bffbf940 5620 if (h->got.offset != (bfd_vma) -1
351f65ca
L
5621 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
5622 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 5623 {
053579d7
AJ
5624 Elf_Internal_Rela rela;
5625
5626 /* This symbol has an entry in the global offset table. Set it
bffbf940 5627 up. */
6de2ae4a 5628 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
c434dee6 5629 abort ();
053579d7 5630
6de2ae4a
L
5631 rela.r_offset = (htab->elf.sgot->output_section->vma
5632 + htab->elf.sgot->output_offset
dc810e39 5633 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ
5634
5635 /* If this is a static link, or it is a -Bsymbolic link and the
5636 symbol is defined locally or was forced to be local because
5637 of a version file, we just want to emit a RELATIVE reloc.
5638 The entry in the global offset table will already have been
5639 initialized in the relocate_section function. */
710ab287 5640 if (h->def_regular
0018b0a3
L
5641 && h->type == STT_GNU_IFUNC)
5642 {
0e1862bb 5643 if (bfd_link_pic (info))
710ab287
L
5644 {
5645 /* Generate R_X86_64_GLOB_DAT. */
5646 goto do_glob_dat;
5647 }
5648 else
5649 {
90d60710
L
5650 asection *plt;
5651
710ab287
L
5652 if (!h->pointer_equality_needed)
5653 abort ();
5654
5655 /* For non-shared object, we can't use .got.plt, which
5656 contains the real function addres if we need pointer
5657 equality. We load the GOT entry with the PLT entry. */
90d60710 5658 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L
5659 bfd_put_64 (output_bfd, (plt->output_section->vma
5660 + plt->output_offset
5661 + h->plt.offset),
6de2ae4a 5662 htab->elf.sgot->contents + h->got.offset);
710ab287
L
5663 return TRUE;
5664 }
0018b0a3 5665 }
0e1862bb 5666 else if (bfd_link_pic (info)
0018b0a3 5667 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 5668 {
41bed6dd
L
5669 if (!h->def_regular)
5670 return FALSE;
cc78d0af 5671 BFD_ASSERT((h->got.offset & 1) != 0);
351f65ca 5672 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
053579d7
AJ
5673 rela.r_addend = (h->root.u.def.value
5674 + h->root.u.def.section->output_section->vma
5675 + h->root.u.def.section->output_offset);
5676 }
5677 else
5678 {
5679 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 5680do_glob_dat:
c434dee6 5681 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 5682 htab->elf.sgot->contents + h->got.offset);
351f65ca 5683 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
053579d7
AJ
5684 rela.r_addend = 0;
5685 }
5686
351f65ca 5687 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
053579d7
AJ
5688 }
5689
f5385ebf 5690 if (h->needs_copy)
70256ad8 5691 {
70256ad8
AJ
5692 Elf_Internal_Rela rela;
5693
5694 /* This symbol needs a copy reloc. Set it up. */
5695
c434dee6
AJ
5696 if (h->dynindx == -1
5697 || (h->root.type != bfd_link_hash_defined
5698 && h->root.type != bfd_link_hash_defweak)
5699 || htab->srelbss == NULL)
5700 abort ();
70256ad8
AJ
5701
5702 rela.r_offset = (h->root.u.def.value
5703 + h->root.u.def.section->output_section->vma
5704 + h->root.u.def.section->output_offset);
351f65ca 5705 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
70256ad8 5706 rela.r_addend = 0;
351f65ca 5707 elf_append_rela (output_bfd, htab->srelbss, &rela);
70256ad8
AJ
5708 }
5709
b34976b6 5710 return TRUE;
70256ad8
AJ
5711}
5712
c25bc9fc
L
5713/* Finish up local dynamic symbol handling. We set the contents of
5714 various dynamic sections here. */
5715
5716static bfd_boolean
351f65ca 5717elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
c25bc9fc
L
5718{
5719 struct elf_link_hash_entry *h
5720 = (struct elf_link_hash_entry *) *slot;
5721 struct bfd_link_info *info
eed180f8 5722 = (struct bfd_link_info *) inf;
c25bc9fc 5723
351f65ca 5724 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
c25bc9fc
L
5725 info, h, NULL);
5726}
5727
c434dee6
AJ
5728/* Used to decide how to sort relocs in an optimal manner for the
5729 dynamic linker, before writing them out. */
5730
5731static enum elf_reloc_type_class
cae1fbbb 5732elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM
5733 const asection *rel_sec ATTRIBUTE_UNUSED,
5734 const Elf_Internal_Rela *rela)
c434dee6 5735{
cae1fbbb
L
5736 bfd *abfd = info->output_bfd;
5737 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5738 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
cae1fbbb 5739
d9e3b590
L
5740 if (htab->elf.dynsym != NULL
5741 && htab->elf.dynsym->contents != NULL)
5742 {
5743 /* Check relocation against STT_GNU_IFUNC symbol if there are
5744 dynamic symbols. */
5745 unsigned long r_symndx = htab->r_sym (rela->r_info);
5746 Elf_Internal_Sym sym;
5747 if (!bed->s->swap_symbol_in (abfd,
5748 (htab->elf.dynsym->contents
5749 + r_symndx * bed->s->sizeof_sym),
5750 0, &sym))
5751 abort ();
5752
5753 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5754 return reloc_class_ifunc;
5755 }
cae1fbbb 5756
351f65ca 5757 switch ((int) ELF32_R_TYPE (rela->r_info))
c434dee6
AJ
5758 {
5759 case R_X86_64_RELATIVE:
1da80baa 5760 case R_X86_64_RELATIVE64:
c434dee6
AJ
5761 return reloc_class_relative;
5762 case R_X86_64_JUMP_SLOT:
5763 return reloc_class_plt;
5764 case R_X86_64_COPY:
5765 return reloc_class_copy;
5766 default:
5767 return reloc_class_normal;
5768 }
5769}
5770
70256ad8
AJ
5771/* Finish up the dynamic sections. */
5772
b34976b6 5773static bfd_boolean
351f65ca
L
5774elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
5775 struct bfd_link_info *info)
70256ad8 5776{
351f65ca 5777 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ
5778 bfd *dynobj;
5779 asection *sdyn;
0ff2b86e 5780 const struct elf_x86_64_backend_data *abed;
70256ad8 5781
351f65ca 5782 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
5783 if (htab == NULL)
5784 return FALSE;
5785
0ff2b86e
L
5786 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5787 section only if there is .plt section. */
5788 abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL
5789 ? &elf_x86_64_bnd_arch_bed
5790 : get_elf_x86_64_backend_data (output_bfd));
5791
c434dee6 5792 dynobj = htab->elf.dynobj;
3d4d4302 5793 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
70256ad8 5794
c434dee6 5795 if (htab->elf.dynamic_sections_created)
70256ad8 5796 {
82e96e07
L
5797 bfd_byte *dyncon, *dynconend;
5798 const struct elf_backend_data *bed;
5799 bfd_size_type sizeof_dyn;
70256ad8 5800
6de2ae4a 5801 if (sdyn == NULL || htab->elf.sgot == NULL)
c434dee6 5802 abort ();
70256ad8 5803
82e96e07
L
5804 bed = get_elf_backend_data (dynobj);
5805 sizeof_dyn = bed->s->sizeof_dyn;
5806 dyncon = sdyn->contents;
5807 dynconend = sdyn->contents + sdyn->size;
5808 for (; dyncon < dynconend; dyncon += sizeof_dyn)
70256ad8
AJ
5809 {
5810 Elf_Internal_Dyn dyn;
70256ad8
AJ
5811 asection *s;
5812
82e96e07 5813 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
70256ad8
AJ
5814
5815 switch (dyn.d_tag)
5816 {
5817 default:
053579d7 5818 continue;
70256ad8
AJ
5819
5820 case DT_PLTGOT:
6de2ae4a 5821 s = htab->elf.sgotplt;
8c37241b 5822 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
c434dee6 5823 break;
70256ad8
AJ
5824
5825 case DT_JMPREL:
6de2ae4a 5826 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
c434dee6 5827 break;
70256ad8 5828
c434dee6 5829 case DT_PLTRELSZ:
6de2ae4a 5830 s = htab->elf.srelplt->output_section;
eea6121a 5831 dyn.d_un.d_val = s->size;
70256ad8
AJ
5832 break;
5833
5834 case DT_RELASZ:
c434dee6
AJ
5835 /* The procedure linkage table relocs (DT_JMPREL) should
5836 not be included in the overall relocs (DT_RELA).
5837 Therefore, we override the DT_RELASZ entry here to
5838 make it not include the JMPREL relocs. Since the
5839 linker script arranges for .rela.plt to follow all
5840 other relocation sections, we don't have to worry
5841 about changing the DT_RELA entry. */
6de2ae4a 5842 if (htab->elf.srelplt != NULL)
70256ad8 5843 {
6de2ae4a 5844 s = htab->elf.srelplt->output_section;
eea6121a 5845 dyn.d_un.d_val -= s->size;
70256ad8
AJ
5846 }
5847 break;
67a4f2b7
AO
5848
5849 case DT_TLSDESC_PLT:
6de2ae4a 5850 s = htab->elf.splt;
67a4f2b7
AO
5851 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5852 + htab->tlsdesc_plt;
5853 break;
5854
5855 case DT_TLSDESC_GOT:
6de2ae4a 5856 s = htab->elf.sgot;
67a4f2b7
AO
5857 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5858 + htab->tlsdesc_got;
5859 break;
70256ad8 5860 }
c434dee6 5861
82e96e07 5862 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
70256ad8
AJ
5863 }
5864
c434dee6 5865 /* Fill in the special first entry in the procedure linkage table. */
6de2ae4a 5866 if (htab->elf.splt && htab->elf.splt->size > 0)
70256ad8 5867 {
653165cc 5868 /* Fill in the first entry in the procedure linkage table. */
eed180f8
RM
5869 memcpy (htab->elf.splt->contents,
5870 abed->plt0_entry, abed->plt_entry_size);
653165cc
AJ
5871 /* Add offset for pushq GOT+8(%rip), since the instruction
5872 uses 6 bytes subtract this value. */
5873 bfd_put_32 (output_bfd,
6de2ae4a
L
5874 (htab->elf.sgotplt->output_section->vma
5875 + htab->elf.sgotplt->output_offset
653165cc 5876 + 8
6de2ae4a
L
5877 - htab->elf.splt->output_section->vma
5878 - htab->elf.splt->output_offset
653165cc 5879 - 6),
eed180f8
RM
5880 htab->elf.splt->contents + abed->plt0_got1_offset);
5881 /* Add offset for the PC-relative instruction accessing GOT+16,
5882 subtracting the offset to the end of that instruction. */
653165cc 5883 bfd_put_32 (output_bfd,
6de2ae4a
L
5884 (htab->elf.sgotplt->output_section->vma
5885 + htab->elf.sgotplt->output_offset
653165cc 5886 + 16
6de2ae4a
L
5887 - htab->elf.splt->output_section->vma
5888 - htab->elf.splt->output_offset
eed180f8
RM
5889 - abed->plt0_got2_insn_end),
5890 htab->elf.splt->contents + abed->plt0_got2_offset);
653165cc 5891
eed180f8
RM
5892 elf_section_data (htab->elf.splt->output_section)
5893 ->this_hdr.sh_entsize = abed->plt_entry_size;
67a4f2b7
AO
5894
5895 if (htab->tlsdesc_plt)
5896 {
5897 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 5898 htab->elf.sgot->contents + htab->tlsdesc_got);
67a4f2b7 5899
6de2ae4a 5900 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
eed180f8 5901 abed->plt0_entry, abed->plt_entry_size);
67a4f2b7
AO
5902
5903 /* Add offset for pushq GOT+8(%rip), since the
5904 instruction uses 6 bytes subtract this value. */
5905 bfd_put_32 (output_bfd,
6de2ae4a
L
5906 (htab->elf.sgotplt->output_section->vma
5907 + htab->elf.sgotplt->output_offset
67a4f2b7 5908 + 8
6de2ae4a
L
5909 - htab->elf.splt->output_section->vma
5910 - htab->elf.splt->output_offset
67a4f2b7
AO
5911 - htab->tlsdesc_plt
5912 - 6),
eed180f8
RM
5913 htab->elf.splt->contents
5914 + htab->tlsdesc_plt + abed->plt0_got1_offset);
5915 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5916 where TGD stands for htab->tlsdesc_got, subtracting the offset
5917 to the end of that instruction. */
67a4f2b7 5918 bfd_put_32 (output_bfd,
6de2ae4a
L
5919 (htab->elf.sgot->output_section->vma
5920 + htab->elf.sgot->output_offset
67a4f2b7 5921 + htab->tlsdesc_got
6de2ae4a
L
5922 - htab->elf.splt->output_section->vma
5923 - htab->elf.splt->output_offset
67a4f2b7 5924 - htab->tlsdesc_plt
eed180f8
RM
5925 - abed->plt0_got2_insn_end),
5926 htab->elf.splt->contents
5927 + htab->tlsdesc_plt + abed->plt0_got2_offset);
67a4f2b7 5928 }
70256ad8 5929 }
70256ad8
AJ
5930 }
5931
0ff2b86e
L
5932 if (htab->plt_bnd != NULL)
5933 elf_section_data (htab->plt_bnd->output_section)
5934 ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry);
5935
6de2ae4a 5936 if (htab->elf.sgotplt)
70256ad8 5937 {
56d4289c
L
5938 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5939 {
5940 (*_bfd_error_handler)
5941 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5942 return FALSE;
5943 }
5944
c434dee6 5945 /* Fill in the first three entries in the global offset table. */
6de2ae4a 5946 if (htab->elf.sgotplt->size > 0)
c434dee6
AJ
5947 {
5948 /* Set the first entry in the global offset table to the address of
5949 the dynamic section. */
5950 if (sdyn == NULL)
6de2ae4a 5951 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
c434dee6
AJ
5952 else
5953 bfd_put_64 (output_bfd,
5954 sdyn->output_section->vma + sdyn->output_offset,
6de2ae4a 5955 htab->elf.sgotplt->contents);
c434dee6 5956 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6de2ae4a
L
5957 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
5958 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
c434dee6 5959 }
70256ad8 5960
6de2ae4a 5961 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
c434dee6
AJ
5962 GOT_ENTRY_SIZE;
5963 }
70256ad8 5964
e41b3a13 5965 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM
5966 if (htab->plt_eh_frame != NULL
5967 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ
5968 {
5969 if (htab->elf.splt != NULL
5970 && htab->elf.splt->size != 0
5971 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5972 && htab->elf.splt->output_section != NULL
5973 && htab->plt_eh_frame->output_section != NULL)
5974 {
5975 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5976 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5977 + htab->plt_eh_frame->output_offset
5978 + PLT_FDE_START_OFFSET;
5979 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5980 htab->plt_eh_frame->contents
5981 + PLT_FDE_START_OFFSET);
5982 }
dbaa2011 5983 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ
5984 {
5985 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5986 htab->plt_eh_frame,
5987 htab->plt_eh_frame->contents))
5988 return FALSE;
5989 }
5990 }
5991
6de2ae4a
L
5992 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5993 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
8c37241b
JJ
5994 = GOT_ENTRY_SIZE;
5995
c25bc9fc
L
5996 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5997 htab_traverse (htab->loc_hash_table,
351f65ca 5998 elf_x86_64_finish_local_dynamic_symbol,
c25bc9fc
L
5999 info);
6000
b34976b6 6001 return TRUE;
8d88c4ca
NC
6002}
6003
3972882e 6004/* Return an array of PLT entry symbol values. */
4c45e5c9 6005
3972882e
L
6006static bfd_vma *
6007elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
6008 asection *relplt)
4c45e5c9 6009{
3972882e
L
6010 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6011 arelent *p;
6012 long count, i;
6013 bfd_vma *plt_sym_val;
144bed8d 6014 bfd_vma plt_offset;
3972882e
L
6015 bfd_byte *plt_contents;
6016 const struct elf_x86_64_backend_data *bed;
6017 Elf_Internal_Shdr *hdr;
6018 asection *plt_bnd;
144bed8d 6019
3972882e
L
6020 /* Get the .plt section contents. PLT passed down may point to the
6021 .plt.bnd section. Make sure that PLT always points to the .plt
6022 section. */
6023 plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd");
6024 if (plt_bnd)
6025 {
6026 if (plt != plt_bnd)
6027 abort ();
6028 plt = bfd_get_section_by_name (abfd, ".plt");
6029 if (plt == NULL)
6030 abort ();
6031 bed = &elf_x86_64_bnd_arch_bed;
6032 }
6033 else
6034 bed = get_elf_x86_64_backend_data (abfd);
cca5b8b6 6035
3972882e
L
6036 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6037 if (plt_contents == NULL)
6038 return NULL;
6039 if (!bfd_get_section_contents (abfd, (asection *) plt,
6040 plt_contents, 0, plt->size))
144bed8d 6041 {
3972882e
L
6042bad_return:
6043 free (plt_contents);
6044 return NULL;
144bed8d
L
6045 }
6046
3972882e
L
6047 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6048 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
6049 goto bad_return;
144bed8d 6050
3972882e
L
6051 hdr = &elf_section_data (relplt)->this_hdr;
6052 count = relplt->size / hdr->sh_entsize;
144bed8d 6053
3972882e
L
6054 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
6055 if (plt_sym_val == NULL)
6056 goto bad_return;
cca5b8b6 6057
35181b3e 6058 for (i = 0; i < count; i++)
3972882e 6059 plt_sym_val[i] = -1;
cca5b8b6 6060
3972882e
L
6061 plt_offset = bed->plt_entry_size;
6062 p = relplt->relocation;
6063 for (i = 0; i < count; i++, p++)
144bed8d 6064 {
3972882e 6065 long reloc_index;
144bed8d 6066
6f25f223 6067 /* Skip unknown relocation. */
533d0af0 6068 if (p->howto == NULL)
6f25f223 6069 continue;
533d0af0 6070
3972882e
L
6071 if (p->howto->type != R_X86_64_JUMP_SLOT
6072 && p->howto->type != R_X86_64_IRELATIVE)
6073 continue;
144bed8d 6074
3972882e
L
6075 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
6076 + bed->plt_reloc_offset));
ec1f73bb 6077 if (reloc_index < count)
144bed8d 6078 {
ec1f73bb
AM
6079 if (plt_bnd)
6080 {
6081 /* This is the index in .plt section. */
6082 long plt_index = plt_offset / bed->plt_entry_size;
6083 /* Store VMA + the offset in .plt.bnd section. */
6084 plt_sym_val[reloc_index] =
6085 (plt_bnd->vma
6086 + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry));
6087 }
6088 else
6089 plt_sym_val[reloc_index] = plt->vma + plt_offset;
144bed8d
L
6090 }
6091 plt_offset += bed->plt_entry_size;
fca6ae69
L
6092
6093 /* PR binutils/18437: Skip extra relocations in the .rela.plt
6094 section. */
6095 if (plt_offset >= plt->size)
6096 break;
144bed8d
L
6097 }
6098
3972882e
L
6099 free (plt_contents);
6100
6101 return plt_sym_val;
4c45e5c9 6102}
8df9fc9d 6103
0ff2b86e
L
6104/* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
6105 support. */
6106
6107static long
6108elf_x86_64_get_synthetic_symtab (bfd *abfd,
6109 long symcount,
6110 asymbol **syms,
6111 long dynsymcount,
6112 asymbol **dynsyms,
6113 asymbol **ret)
6114{
3972882e
L
6115 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
6116 as PLT if it exists. */
6117 asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd");
0ff2b86e 6118 if (plt == NULL)
3972882e
L
6119 plt = bfd_get_section_by_name (abfd, ".plt");
6120 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
6121 dynsymcount, dynsyms, ret,
6122 plt,
6123 elf_x86_64_get_plt_sym_val);
0ff2b86e
L
6124}
6125
d2b2c203
DJ
6126/* Handle an x86-64 specific section when reading an object file. This
6127 is called when elfcode.h finds a section with an unknown type. */
6128
6129static bfd_boolean
0c723101
L
6130elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
6131 const char *name, int shindex)
d2b2c203
DJ
6132{
6133 if (hdr->sh_type != SHT_X86_64_UNWIND)
6134 return FALSE;
6135
6dc132d9 6136 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
d2b2c203
DJ
6137 return FALSE;
6138
6139 return TRUE;
6140}
6141
3b22753a
L
6142/* Hook called by the linker routine which adds symbols from an object
6143 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
6144 of .bss. */
6145
6146static bfd_boolean
351f65ca
L
6147elf_x86_64_add_symbol_hook (bfd *abfd,
6148 struct bfd_link_info *info,
6149 Elf_Internal_Sym *sym,
6150 const char **namep ATTRIBUTE_UNUSED,
6151 flagword *flagsp ATTRIBUTE_UNUSED,
6152 asection **secp,
6153 bfd_vma *valp)
3b22753a
L
6154{
6155 asection *lcomm;
6156
6157 switch (sym->st_shndx)
6158 {
6159 case SHN_X86_64_LCOMMON:
6160 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
6161 if (lcomm == NULL)
6162 {
6163 lcomm = bfd_make_section_with_flags (abfd,
6164 "LARGE_COMMON",
6165 (SEC_ALLOC
6166 | SEC_IS_COMMON
6167 | SEC_LINKER_CREATED));
6168 if (lcomm == NULL)
6169 return FALSE;
6170 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
6171 }
6172 *secp = lcomm;
6173 *valp = sym->st_size;
c35bdf6e 6174 return TRUE;
3b22753a 6175 }
d8045f23 6176
13a2df29 6177 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
f1885d1e
AM
6178 && (abfd->flags & DYNAMIC) == 0
6179 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
13a2df29
L
6180 elf_tdata (info->output_bfd)->has_gnu_symbols
6181 |= elf_gnu_symbol_unique;
d8045f23 6182
3b22753a
L
6183 return TRUE;
6184}
6185
6186
6187/* Given a BFD section, try to locate the corresponding ELF section
6188 index. */
6189
6190static bfd_boolean
351f65ca
L
6191elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
6192 asection *sec, int *index_return)
3b22753a
L
6193{
6194 if (sec == &_bfd_elf_large_com_section)
6195 {
91d6fa6a 6196 *index_return = SHN_X86_64_LCOMMON;
3b22753a
L
6197 return TRUE;
6198 }
6199 return FALSE;
6200}
6201
6202/* Process a symbol. */
6203
6204static void
351f65ca
L
6205elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
6206 asymbol *asym)
3b22753a
L
6207{
6208 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
6209
6210 switch (elfsym->internal_elf_sym.st_shndx)
6211 {
6212 case SHN_X86_64_LCOMMON:
6213 asym->section = &_bfd_elf_large_com_section;
6214 asym->value = elfsym->internal_elf_sym.st_size;
6215 /* Common symbol doesn't set BSF_GLOBAL. */
6216 asym->flags &= ~BSF_GLOBAL;
6217 break;
6218 }
6219}
6220
6221static bfd_boolean
351f65ca 6222elf_x86_64_common_definition (Elf_Internal_Sym *sym)
3b22753a
L
6223{
6224 return (sym->st_shndx == SHN_COMMON
6225 || sym->st_shndx == SHN_X86_64_LCOMMON);
6226}
6227
6228static unsigned int
351f65ca 6229elf_x86_64_common_section_index (asection *sec)
3b22753a
L
6230{
6231 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6232 return SHN_COMMON;
6233 else
6234 return SHN_X86_64_LCOMMON;
6235}
6236
6237static asection *
351f65ca 6238elf_x86_64_common_section (asection *sec)
3b22753a
L
6239{
6240 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6241 return bfd_com_section_ptr;
6242 else
6243 return &_bfd_elf_large_com_section;
6244}
6245
6246static bfd_boolean
5d13b3b3
AM
6247elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
6248 const Elf_Internal_Sym *sym,
351f65ca 6249 asection **psec,
5d13b3b3
AM
6250 bfd_boolean newdef,
6251 bfd_boolean olddef,
351f65ca 6252 bfd *oldbfd,
5d13b3b3 6253 const asection *oldsec)
3b22753a
L
6254{
6255 /* A normal common symbol and a large common symbol result in a
00492999
L
6256 normal common symbol. We turn the large common symbol into a
6257 normal one. */
5d13b3b3 6258 if (!olddef
3b22753a 6259 && h->root.type == bfd_link_hash_common
5d13b3b3
AM
6260 && !newdef
6261 && bfd_is_com_section (*psec)
6262 && oldsec != *psec)
3b22753a 6263 {
00492999 6264 if (sym->st_shndx == SHN_COMMON
5d13b3b3 6265 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
00492999
L
6266 {
6267 h->root.u.c.p->section
6268 = bfd_make_section_old_way (oldbfd, "COMMON");
6269 h->root.u.c.p->section->flags = SEC_ALLOC;
6270 }
6271 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5d13b3b3
AM
6272 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
6273 *psec = bfd_com_section_ptr;
3b22753a
L
6274 }
6275
6276 return TRUE;
6277}
6278
6279static int
351f65ca
L
6280elf_x86_64_additional_program_headers (bfd *abfd,
6281 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3b22753a
L
6282{
6283 asection *s;
9a2e389a 6284 int count = 0;
3b22753a
L
6285
6286 /* Check to see if we need a large readonly segment. */
6287 s = bfd_get_section_by_name (abfd, ".lrodata");
6288 if (s && (s->flags & SEC_LOAD))
6289 count++;
6290
6291 /* Check to see if we need a large data segment. Since .lbss sections
6292 is placed right after the .bss section, there should be no need for
6293 a large data segment just because of .lbss. */
6294 s = bfd_get_section_by_name (abfd, ".ldata");
6295 if (s && (s->flags & SEC_LOAD))
6296 count++;
6297
6298 return count;
6299}
6300
fdc90cb4
JJ
6301/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6302
6303static bfd_boolean
351f65ca 6304elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
fdc90cb4
JJ
6305{
6306 if (h->plt.offset != (bfd_vma) -1
6307 && !h->def_regular
6308 && !h->pointer_equality_needed)
6309 return FALSE;
6310
6311 return _bfd_elf_hash_symbol (h);
6312}
6313
c543bf9a
L
6314/* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
6315
6316static bfd_boolean
6317elf_x86_64_relocs_compatible (const bfd_target *input,
6318 const bfd_target *output)
6319{
6320 return ((xvec_get_elf_backend_data (input)->s->elfclass
6321 == xvec_get_elf_backend_data (output)->s->elfclass)
6322 && _bfd_elf_relocs_compatible (input, output));
6323}
6324
9a2e389a 6325static const struct bfd_elf_special_section
351f65ca 6326 elf_x86_64_special_sections[]=
3b22753a 6327{
0112cd26
NC
6328 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6329 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6330 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
6331 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6332 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6333 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6334 { NULL, 0, 0, 0, 0 }
3b22753a
L
6335};
6336
6d00b590 6337#define TARGET_LITTLE_SYM x86_64_elf64_vec
70256ad8
AJ
6338#define TARGET_LITTLE_NAME "elf64-x86-64"
6339#define ELF_ARCH bfd_arch_i386
ae95ffa6 6340#define ELF_TARGET_ID X86_64_ELF_DATA
70256ad8 6341#define ELF_MACHINE_CODE EM_X86_64
f7661549 6342#define ELF_MAXPAGESIZE 0x200000
2043964e 6343#define ELF_MINPAGESIZE 0x1000
24718e3b 6344#define ELF_COMMONPAGESIZE 0x1000
70256ad8
AJ
6345
6346#define elf_backend_can_gc_sections 1
51b64d56 6347#define elf_backend_can_refcount 1
70256ad8
AJ
6348#define elf_backend_want_got_plt 1
6349#define elf_backend_plt_readonly 1
6350#define elf_backend_want_plt_sym 0
6351#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 6352#define elf_backend_rela_normal 1
e41b3a13 6353#define elf_backend_plt_alignment 4
f7483970 6354#define elf_backend_extern_protected_data 1
70256ad8 6355
351f65ca 6356#define elf_info_to_howto elf_x86_64_info_to_howto
70256ad8 6357
70256ad8 6358#define bfd_elf64_bfd_link_hash_table_create \
351f65ca 6359 elf_x86_64_link_hash_table_create
351f65ca 6360#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
157090f7 6361#define bfd_elf64_bfd_reloc_name_lookup \
351f65ca 6362 elf_x86_64_reloc_name_lookup
70256ad8 6363
351f65ca 6364#define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
c543bf9a 6365#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
351f65ca
L
6366#define elf_backend_check_relocs elf_x86_64_check_relocs
6367#define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
6368#define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
6369#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6370#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6371#define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
6372#define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
6373#define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6374#define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
8fd79e71
L
6375#ifdef CORE_HEADER
6376#define elf_backend_write_core_note elf_x86_64_write_core_note
6377#endif
351f65ca
L
6378#define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6379#define elf_backend_relocate_section elf_x86_64_relocate_section
6380#define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6381#define elf_backend_always_size_sections elf_x86_64_always_size_sections
74541ad4 6382#define elf_backend_init_index_section _bfd_elf_init_1_index_section
407443a3 6383#define elf_backend_object_p elf64_x86_64_elf_object_p
351f65ca 6384#define bfd_elf64_mkobject elf_x86_64_mkobject
0ff2b86e 6385#define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
8d88c4ca 6386
d2b2c203 6387#define elf_backend_section_from_shdr \
351f65ca 6388 elf_x86_64_section_from_shdr
d2b2c203 6389
3b22753a 6390#define elf_backend_section_from_bfd_section \
351f65ca 6391 elf_x86_64_elf_section_from_bfd_section
3b22753a 6392#define elf_backend_add_symbol_hook \
351f65ca 6393 elf_x86_64_add_symbol_hook
3b22753a 6394#define elf_backend_symbol_processing \
351f65ca 6395 elf_x86_64_symbol_processing
3b22753a 6396#define elf_backend_common_section_index \
351f65ca 6397 elf_x86_64_common_section_index
3b22753a 6398#define elf_backend_common_section \
351f65ca 6399 elf_x86_64_common_section
3b22753a 6400#define elf_backend_common_definition \
351f65ca 6401 elf_x86_64_common_definition
3b22753a 6402#define elf_backend_merge_symbol \
351f65ca 6403 elf_x86_64_merge_symbol
3b22753a 6404#define elf_backend_special_sections \
351f65ca 6405 elf_x86_64_special_sections
3b22753a 6406#define elf_backend_additional_program_headers \
351f65ca 6407 elf_x86_64_additional_program_headers
fdc90cb4 6408#define elf_backend_hash_symbol \
351f65ca 6409 elf_x86_64_hash_symbol
3b22753a 6410
8d88c4ca 6411#include "elf64-target.h"
9d7cbccd 6412
6036f486
ES
6413/* CloudABI support. */
6414
6415#undef TARGET_LITTLE_SYM
6416#define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6417#undef TARGET_LITTLE_NAME
6418#define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6419
6420#undef ELF_OSABI
6421#define ELF_OSABI ELFOSABI_CLOUDABI
6422
6423#undef elf64_bed
6424#define elf64_bed elf64_x86_64_cloudabi_bed
6425
6426#include "elf64-target.h"
6427
9d7cbccd
NC
6428/* FreeBSD support. */
6429
6430#undef TARGET_LITTLE_SYM
6d00b590 6431#define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
9d7cbccd
NC
6432#undef TARGET_LITTLE_NAME
6433#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6434
d1036acb
L
6435#undef ELF_OSABI
6436#define ELF_OSABI ELFOSABI_FREEBSD
9d7cbccd 6437
9d7cbccd
NC
6438#undef elf64_bed
6439#define elf64_bed elf64_x86_64_fbsd_bed
6440
6441#include "elf64-target.h"
8a9036a4 6442
a6cc6b3b
RO
6443/* Solaris 2 support. */
6444
6445#undef TARGET_LITTLE_SYM
6d00b590 6446#define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
a6cc6b3b
RO
6447#undef TARGET_LITTLE_NAME
6448#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6449
6450/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6451 objects won't be recognized. */
6452#undef ELF_OSABI
6453
6454#undef elf64_bed
6455#define elf64_bed elf64_x86_64_sol2_bed
6456
7dc98aea
RO
6457/* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6458 boundary. */
6459#undef elf_backend_static_tls_alignment
6460#define elf_backend_static_tls_alignment 16
6461
a6cc6b3b
RO
6462/* The Solaris 2 ABI requires a plt symbol on all platforms.
6463
6464 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6465 File, p.63. */
6466#undef elf_backend_want_plt_sym
6467#define elf_backend_want_plt_sym 1
6468
6469#include "elf64-target.h"
6470
8059fb19
RM
6471/* Native Client support. */
6472
64b384e1
RM
6473static bfd_boolean
6474elf64_x86_64_nacl_elf_object_p (bfd *abfd)
6475{
6476 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6477 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
6478 return TRUE;
6479}
6480
8059fb19 6481#undef TARGET_LITTLE_SYM
6d00b590 6482#define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
8059fb19
RM
6483#undef TARGET_LITTLE_NAME
6484#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6485#undef elf64_bed
6486#define elf64_bed elf64_x86_64_nacl_bed
6487
6488#undef ELF_MAXPAGESIZE
6489#undef ELF_MINPAGESIZE
6490#undef ELF_COMMONPAGESIZE
6491#define ELF_MAXPAGESIZE 0x10000
6492#define ELF_MINPAGESIZE 0x10000
6493#define ELF_COMMONPAGESIZE 0x10000
6494
6495/* Restore defaults. */
6496#undef ELF_OSABI
6497#undef elf_backend_static_tls_alignment
6498#undef elf_backend_want_plt_sym
6499#define elf_backend_want_plt_sym 0
6500
6501/* NaCl uses substantially different PLT entries for the same effects. */
6502
6503#undef elf_backend_plt_alignment
6504#define elf_backend_plt_alignment 5
6505#define NACL_PLT_ENTRY_SIZE 64
6506#define NACLMASK 0xe0 /* 32-byte alignment mask. */
6507
6508static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
6509 {
6510 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6511 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6512 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6513 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6514 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6515
ea2d813e 6516 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
70cc877f 6517 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
ea2d813e
RM
6518
6519 /* 32 bytes of nop to pad out to the standard size. */
8059fb19
RM
6520 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6521 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6522 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6523 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
ea2d813e
RM
6524 0x66, /* excess data32 prefix */
6525 0x90 /* nop */
8059fb19
RM
6526 };
6527
6528static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6529 {
6530 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6531 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6532 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6533 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6534
6535 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6536 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6537 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6538
6539 /* Lazy GOT entries point here (32-byte aligned). */
6540 0x68, /* pushq immediate */
6541 0, 0, 0, 0, /* replaced with index into relocation table. */
6542 0xe9, /* jmp relative */
6543 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6544
6545 /* 22 bytes of nop to pad out to the standard size. */
6546 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6547 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6548 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6549 };
6550
6551/* .eh_frame covering the .plt section. */
6552
6553static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
6554 {
6555#if (PLT_CIE_LENGTH != 20 \
6556 || PLT_FDE_LENGTH != 36 \
6557 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6558 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6559# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6560#endif
6561 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6562 0, 0, 0, 0, /* CIE ID */
6563 1, /* CIE version */
6564 'z', 'R', 0, /* Augmentation string */
6565 1, /* Code alignment factor */
6566 0x78, /* Data alignment factor */
6567 16, /* Return address column */
6568 1, /* Augmentation size */
6569 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6570 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6571 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6572 DW_CFA_nop, DW_CFA_nop,
6573
6574 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6575 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
6576 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6577 0, 0, 0, 0, /* .plt size goes here */
6578 0, /* Augmentation size */
6579 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
6580 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6581 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
6582 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6583 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6584 13, /* Block length */
6585 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
6586 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
6587 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6588 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
6589 DW_CFA_nop, DW_CFA_nop
6590 };
6591
6592static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
6593 {
6594 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
6595 elf_x86_64_nacl_plt_entry, /* plt_entry */
6596 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6597 2, /* plt0_got1_offset */
6598 9, /* plt0_got2_offset */
6599 13, /* plt0_got2_insn_end */
6600 3, /* plt_got_offset */
6601 33, /* plt_reloc_offset */
6602 38, /* plt_plt_offset */
6603 7, /* plt_got_insn_size */
6604 42, /* plt_plt_insn_end */
6605 32, /* plt_lazy_offset */
6606 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
6607 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
6608 };
6609
6610#undef elf_backend_arch_data
6611#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6612
64b384e1
RM
6613#undef elf_backend_object_p
6614#define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5a68afcf
RM
6615#undef elf_backend_modify_segment_map
6616#define elf_backend_modify_segment_map nacl_modify_segment_map
6617#undef elf_backend_modify_program_headers
6618#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM
6619#undef elf_backend_final_write_processing
6620#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 6621
8059fb19
RM
6622#include "elf64-target.h"
6623
6624/* Native Client x32 support. */
6625
64b384e1
RM
6626static bfd_boolean
6627elf32_x86_64_nacl_elf_object_p (bfd *abfd)
6628{
6629 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6630 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
6631 return TRUE;
6632}
6633
8059fb19 6634#undef TARGET_LITTLE_SYM
6d00b590 6635#define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
8059fb19
RM
6636#undef TARGET_LITTLE_NAME
6637#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6638#undef elf32_bed
6639#define elf32_bed elf32_x86_64_nacl_bed
6640
6641#define bfd_elf32_bfd_link_hash_table_create \
6642 elf_x86_64_link_hash_table_create
8059fb19
RM
6643#define bfd_elf32_bfd_reloc_type_lookup \
6644 elf_x86_64_reloc_type_lookup
6645#define bfd_elf32_bfd_reloc_name_lookup \
6646 elf_x86_64_reloc_name_lookup
6647#define bfd_elf32_mkobject \
6648 elf_x86_64_mkobject
b7365e5d
L
6649#define bfd_elf32_get_synthetic_symtab \
6650 elf_x86_64_get_synthetic_symtab
8059fb19
RM
6651
6652#undef elf_backend_object_p
6653#define elf_backend_object_p \
64b384e1 6654 elf32_x86_64_nacl_elf_object_p
8059fb19
RM
6655
6656#undef elf_backend_bfd_from_remote_memory
6657#define elf_backend_bfd_from_remote_memory \
6658 _bfd_elf32_bfd_from_remote_memory
6659
6660#undef elf_backend_size_info
6661#define elf_backend_size_info \
6662 _bfd_elf32_size_info
6663
6664#include "elf32-target.h"
6665
6666/* Restore defaults. */
5a68afcf 6667#undef elf_backend_object_p
8059fb19 6668#define elf_backend_object_p elf64_x86_64_elf_object_p
5a68afcf
RM
6669#undef elf_backend_bfd_from_remote_memory
6670#undef elf_backend_size_info
6671#undef elf_backend_modify_segment_map
6672#undef elf_backend_modify_program_headers
887badb3 6673#undef elf_backend_final_write_processing
8059fb19 6674
8a9036a4
L
6675/* Intel L1OM support. */
6676
6677static bfd_boolean
6678elf64_l1om_elf_object_p (bfd *abfd)
6679{
6680 /* Set the right machine number for an L1OM elf64 file. */
6681 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
6682 return TRUE;
6683}
6684
6685#undef TARGET_LITTLE_SYM
6d00b590 6686#define TARGET_LITTLE_SYM l1om_elf64_vec
8a9036a4
L
6687#undef TARGET_LITTLE_NAME
6688#define TARGET_LITTLE_NAME "elf64-l1om"
6689#undef ELF_ARCH
6690#define ELF_ARCH bfd_arch_l1om
6691
6692#undef ELF_MACHINE_CODE
6693#define ELF_MACHINE_CODE EM_L1OM
6694
6695#undef ELF_OSABI
6696
6697#undef elf64_bed
6698#define elf64_bed elf64_l1om_bed
6699
6700#undef elf_backend_object_p
6701#define elf_backend_object_p elf64_l1om_elf_object_p
6702
8059fb19
RM
6703/* Restore defaults. */
6704#undef ELF_MAXPAGESIZE
6705#undef ELF_MINPAGESIZE
6706#undef ELF_COMMONPAGESIZE
6707#define ELF_MAXPAGESIZE 0x200000
6708#define ELF_MINPAGESIZE 0x1000
6709#define ELF_COMMONPAGESIZE 0x1000
6710#undef elf_backend_plt_alignment
6711#define elf_backend_plt_alignment 4
6712#undef elf_backend_arch_data
6713#define elf_backend_arch_data &elf_x86_64_arch_bed
1a0c107f 6714
8a9036a4
L
6715#include "elf64-target.h"
6716
6717/* FreeBSD L1OM support. */
6718
6719#undef TARGET_LITTLE_SYM
6d00b590 6720#define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
8a9036a4
L
6721#undef TARGET_LITTLE_NAME
6722#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6723
6724#undef ELF_OSABI
6725#define ELF_OSABI ELFOSABI_FREEBSD
6726
6727#undef elf64_bed
6728#define elf64_bed elf64_l1om_fbsd_bed
6729
8a9036a4 6730#include "elf64-target.h"
351f65ca 6731
7a9068fe
L
6732/* Intel K1OM support. */
6733
6734static bfd_boolean
6735elf64_k1om_elf_object_p (bfd *abfd)
6736{
6737 /* Set the right machine number for an K1OM elf64 file. */
6738 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
6739 return TRUE;
6740}
6741
6742#undef TARGET_LITTLE_SYM
6d00b590 6743#define TARGET_LITTLE_SYM k1om_elf64_vec
7a9068fe
L
6744#undef TARGET_LITTLE_NAME
6745#define TARGET_LITTLE_NAME "elf64-k1om"
6746#undef ELF_ARCH
6747#define ELF_ARCH bfd_arch_k1om
6748
6749#undef ELF_MACHINE_CODE
6750#define ELF_MACHINE_CODE EM_K1OM
6751
6752#undef ELF_OSABI
6753
6754#undef elf64_bed
6755#define elf64_bed elf64_k1om_bed
6756
6757#undef elf_backend_object_p
6758#define elf_backend_object_p elf64_k1om_elf_object_p
6759
6760#undef elf_backend_static_tls_alignment
6761
6762#undef elf_backend_want_plt_sym
6763#define elf_backend_want_plt_sym 0
6764
6765#include "elf64-target.h"
6766
6767/* FreeBSD K1OM support. */
6768
6769#undef TARGET_LITTLE_SYM
6d00b590 6770#define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
7a9068fe
L
6771#undef TARGET_LITTLE_NAME
6772#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6773
6774#undef ELF_OSABI
6775#define ELF_OSABI ELFOSABI_FREEBSD
6776
6777#undef elf64_bed
6778#define elf64_bed elf64_k1om_fbsd_bed
6779
6780#include "elf64-target.h"
6781
351f65ca
L
6782/* 32bit x86-64 support. */
6783
351f65ca 6784#undef TARGET_LITTLE_SYM
6d00b590 6785#define TARGET_LITTLE_SYM x86_64_elf32_vec
351f65ca
L
6786#undef TARGET_LITTLE_NAME
6787#define TARGET_LITTLE_NAME "elf32-x86-64"
8059fb19 6788#undef elf32_bed
351f65ca
L
6789
6790#undef ELF_ARCH
6791#define ELF_ARCH bfd_arch_i386
6792
6793#undef ELF_MACHINE_CODE
6794#define ELF_MACHINE_CODE EM_X86_64
6795
351f65ca
L
6796#undef ELF_OSABI
6797
351f65ca
L
6798#undef elf_backend_object_p
6799#define elf_backend_object_p \
6800 elf32_x86_64_elf_object_p
6801
6802#undef elf_backend_bfd_from_remote_memory
6803#define elf_backend_bfd_from_remote_memory \
6804 _bfd_elf32_bfd_from_remote_memory
6805
6806#undef elf_backend_size_info
6807#define elf_backend_size_info \
6808 _bfd_elf32_size_info
6809
6810#include "elf32-target.h"
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