Add test for string evaluation with "debug expression" on
[deliverable/binutils-gdb.git] / bfd / elf64-x86-64.c
CommitLineData
351f65ca 1/* X86-64 specific support for ELF
4b95cf5c 2 Copyright (C) 2000-2014 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
NC
33
34#include "elf/x86-64.h"
35
8fd79e71
L
36#ifdef CORE_HEADER
37#include <stdarg.h>
38#include CORE_HEADER
39#endif
40
8d88c4ca
NC
41/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
42#define MINUS_ONE (~ (bfd_vma) 0)
43
351f65ca
L
44/* Since both 32-bit and 64-bit x86-64 encode relocation type in the
45 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
46 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
47 since they are the same. */
48
49#define ABI_64_P(abfd) \
50 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
51
8d88c4ca 52/* The relocation "howto" table. Order of fields:
7b81dfbb
AJ
53 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
54 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
70256ad8
AJ
55static reloc_howto_type x86_64_elf_howto_table[] =
56{
b34976b6
AM
57 HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
59 FALSE),
60 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
62 FALSE),
63 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
64 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
65 TRUE),
66 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
67 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
68 FALSE),
69 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
70 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
71 TRUE),
72 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
74 FALSE),
75 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
77 MINUS_ONE, FALSE),
78 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
80 MINUS_ONE, FALSE),
81 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
83 MINUS_ONE, FALSE),
84 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
85 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
86 0xffffffff, TRUE),
87 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
88 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
89 FALSE),
90 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
91 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
92 FALSE),
93 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
b0360d8c 95 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
b34976b6 96 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
ac2aa337 97 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
b34976b6
AM
98 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
99 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
100 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
101 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
103 MINUS_ONE, FALSE),
104 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
106 MINUS_ONE, FALSE),
107 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
109 MINUS_ONE, FALSE),
110 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
112 0xffffffff, TRUE),
113 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
114 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
115 0xffffffff, TRUE),
ac2aa337 116 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
b34976b6
AM
117 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
118 0xffffffff, FALSE),
119 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
120 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
121 0xffffffff, TRUE),
122 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
123 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
124 0xffffffff, FALSE),
d6ab8113
JB
125 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
127 TRUE),
128 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
130 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
131 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
132 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
133 FALSE, 0xffffffff, 0xffffffff, TRUE),
7b81dfbb
AJ
134 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
135 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
136 FALSE),
137 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
138 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
139 MINUS_ONE, TRUE),
140 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
141 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
142 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
143 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
144 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
145 MINUS_ONE, FALSE),
146 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
147 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
148 MINUS_ONE, FALSE),
1788fc08
L
149 HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
150 bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
151 FALSE),
152 HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
153 bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
154 FALSE),
67a4f2b7
AO
155 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
156 complain_overflow_bitfield, bfd_elf_generic_reloc,
157 "R_X86_64_GOTPC32_TLSDESC",
158 FALSE, 0xffffffff, 0xffffffff, TRUE),
159 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
160 complain_overflow_dont, bfd_elf_generic_reloc,
161 "R_X86_64_TLSDESC_CALL",
162 FALSE, 0, 0, FALSE),
163 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
164 complain_overflow_bitfield, bfd_elf_generic_reloc,
165 "R_X86_64_TLSDESC",
166 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
cbe950e9
L
167 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
169 MINUS_ONE, FALSE),
64d25c44
L
170 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
172 MINUS_ONE, FALSE),
c3320543
L
173 HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
174 bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
175 TRUE),
176 HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
177 bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
178 TRUE),
fe4770f4 179
a33d77bc
JB
180 /* We have a gap in the reloc numbers here.
181 R_X86_64_standard counts the number up to this point, and
182 R_X86_64_vt_offset is the value to subtract from a reloc type of
183 R_X86_64_GNU_VT* to form an index into this table. */
c3320543 184#define R_X86_64_standard (R_X86_64_PLT32_BND + 1)
a33d77bc
JB
185#define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
186
fe4770f4 187/* GNU extension to record C++ vtable hierarchy. */
b34976b6
AM
188 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
189 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
fe4770f4
AJ
190
191/* GNU extension to record C++ vtable member usage. */
b34976b6
AM
192 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
193 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
d7921315
L
194 FALSE),
195
196/* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
197 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
199 FALSE)
8d88c4ca
NC
200};
201
d8045f23
NC
202#define IS_X86_64_PCREL_TYPE(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
c3320543 206 || ((TYPE) == R_X86_64_PC32_BND) \
d8045f23
NC
207 || ((TYPE) == R_X86_64_PC64))
208
8d88c4ca 209/* Map BFD relocs to the x86_64 elf relocs. */
70256ad8
AJ
210struct elf_reloc_map
211{
8d88c4ca
NC
212 bfd_reloc_code_real_type bfd_reloc_val;
213 unsigned char elf_reloc_val;
214};
215
dc810e39 216static const struct elf_reloc_map x86_64_reloc_map[] =
8d88c4ca 217{
70256ad8
AJ
218 { BFD_RELOC_NONE, R_X86_64_NONE, },
219 { BFD_RELOC_64, R_X86_64_64, },
220 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
221 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
222 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
223 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
224 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
225 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
226 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
227 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
228 { BFD_RELOC_32, R_X86_64_32, },
229 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
230 { BFD_RELOC_16, R_X86_64_16, },
231 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
232 { BFD_RELOC_8, R_X86_64_8, },
233 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
bffbf940
JJ
234 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
235 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
236 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
237 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
238 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
239 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
240 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
241 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
d6ab8113
JB
242 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
243 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
244 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
7b81dfbb
AJ
245 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
246 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
247 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
248 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
249 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
1788fc08
L
250 { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
251 { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
67a4f2b7
AO
252 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
253 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
254 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
cbe950e9 255 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
c3320543
L
256 { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND,},
257 { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND,},
fe4770f4
AJ
258 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
259 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
8d88c4ca
NC
260};
261
67a4f2b7 262static reloc_howto_type *
351f65ca 263elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
67a4f2b7
AO
264{
265 unsigned i;
266
d7921315
L
267 if (r_type == (unsigned int) R_X86_64_32)
268 {
269 if (ABI_64_P (abfd))
270 i = r_type;
271 else
272 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
273 }
274 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
275 || r_type >= (unsigned int) R_X86_64_max)
67a4f2b7
AO
276 {
277 if (r_type >= (unsigned int) R_X86_64_standard)
278 {
279 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
280 abfd, (int) r_type);
281 r_type = R_X86_64_NONE;
282 }
283 i = r_type;
284 }
285 else
286 i = r_type - (unsigned int) R_X86_64_vt_offset;
287 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
288 return &x86_64_elf_howto_table[i];
289}
8d88c4ca
NC
290
291/* Given a BFD reloc type, return a HOWTO structure. */
292static reloc_howto_type *
351f65ca
L
293elf_x86_64_reloc_type_lookup (bfd *abfd,
294 bfd_reloc_code_real_type code)
8d88c4ca
NC
295{
296 unsigned int i;
27482721 297
8d88c4ca
NC
298 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
299 i++)
300 {
301 if (x86_64_reloc_map[i].bfd_reloc_val == code)
351f65ca
L
302 return elf_x86_64_rtype_to_howto (abfd,
303 x86_64_reloc_map[i].elf_reloc_val);
8d88c4ca
NC
304 }
305 return 0;
306}
307
157090f7 308static reloc_howto_type *
d7921315 309elf_x86_64_reloc_name_lookup (bfd *abfd,
351f65ca 310 const char *r_name)
157090f7
AM
311{
312 unsigned int i;
313
d7921315
L
314 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
315 {
316 /* Get x32 R_X86_64_32. */
317 reloc_howto_type *reloc
318 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
319 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
320 return reloc;
321 }
322
323 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
157090f7
AM
324 if (x86_64_elf_howto_table[i].name != NULL
325 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
326 return &x86_64_elf_howto_table[i];
327
328 return NULL;
329}
330
8d88c4ca 331/* Given an x86_64 ELF reloc type, fill in an arelent structure. */
8da6118f 332
8d88c4ca 333static void
351f65ca
L
334elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
335 Elf_Internal_Rela *dst)
8d88c4ca 336{
67a4f2b7 337 unsigned r_type;
8d88c4ca 338
351f65ca
L
339 r_type = ELF32_R_TYPE (dst->r_info);
340 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
8d88c4ca
NC
341 BFD_ASSERT (r_type == cache_ptr->howto->type);
342}
70256ad8 343\f
3bab7989 344/* Support for core dump NOTE sections. */
b34976b6 345static bfd_boolean
351f65ca 346elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML
347{
348 int offset;
eea6121a 349 size_t size;
3bab7989
ML
350
351 switch (note->descsz)
352 {
353 default:
b34976b6 354 return FALSE;
3bab7989 355
bcd823f1
L
356 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
357 /* pr_cursig */
228e534f 358 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
bcd823f1
L
359
360 /* pr_pid */
228e534f 361 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
bcd823f1
L
362
363 /* pr_reg */
364 offset = 72;
365 size = 216;
366
367 break;
368
3bab7989
ML
369 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
370 /* pr_cursig */
228e534f 371 elf_tdata (abfd)->core->signal
3bab7989
ML
372 = bfd_get_16 (abfd, note->descdata + 12);
373
374 /* pr_pid */
228e534f 375 elf_tdata (abfd)->core->lwpid
3bab7989
ML
376 = bfd_get_32 (abfd, note->descdata + 32);
377
378 /* pr_reg */
379 offset = 112;
eea6121a 380 size = 216;
3bab7989
ML
381
382 break;
383 }
384
385 /* Make a ".reg/999" section. */
386 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 387 size, note->descpos + offset);
3bab7989
ML
388}
389
b34976b6 390static bfd_boolean
351f65ca 391elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML
392{
393 switch (note->descsz)
394 {
395 default:
b34976b6 396 return FALSE;
3bab7989 397
bcd823f1 398 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
228e534f 399 elf_tdata (abfd)->core->pid
bcd823f1 400 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 401 elf_tdata (abfd)->core->program
bcd823f1 402 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 403 elf_tdata (abfd)->core->command
bcd823f1
L
404 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
405 break;
406
3bab7989 407 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
228e534f 408 elf_tdata (abfd)->core->pid
261b8d08 409 = bfd_get_32 (abfd, note->descdata + 24);
228e534f 410 elf_tdata (abfd)->core->program
3bab7989 411 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
228e534f 412 elf_tdata (abfd)->core->command
3bab7989
ML
413 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
414 }
415
416 /* Note that for some reason, a spurious space is tacked
417 onto the end of the args in some (at least one anyway)
418 implementations, so strip it off if it exists. */
419
420 {
228e534f 421 char *command = elf_tdata (abfd)->core->command;
3bab7989
ML
422 int n = strlen (command);
423
424 if (0 < n && command[n - 1] == ' ')
425 command[n - 1] = '\0';
426 }
427
b34976b6 428 return TRUE;
3bab7989 429}
8fd79e71
L
430
431#ifdef CORE_HEADER
432static char *
433elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
434 int note_type, ...)
435{
436 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8fd79e71
L
437 va_list ap;
438 const char *fname, *psargs;
439 long pid;
440 int cursig;
441 const void *gregs;
442
443 switch (note_type)
444 {
445 default:
446 return NULL;
447
448 case NT_PRPSINFO:
449 va_start (ap, note_type);
450 fname = va_arg (ap, const char *);
451 psargs = va_arg (ap, const char *);
452 va_end (ap);
453
454 if (bed->s->elfclass == ELFCLASS32)
455 {
456 prpsinfo32_t data;
457 memset (&data, 0, sizeof (data));
458 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
459 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK
460 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
461 &data, sizeof (data));
8fd79e71
L
462 }
463 else
464 {
b1bd052d 465 prpsinfo64_t data;
8fd79e71
L
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 471 }
e85c6a70 472 /* NOTREACHED */
8fd79e71
L
473
474 case NT_PRSTATUS:
475 va_start (ap, note_type);
476 pid = va_arg (ap, long);
477 cursig = va_arg (ap, int);
478 gregs = va_arg (ap, const void *);
479 va_end (ap);
480
481 if (bed->s->elfclass == ELFCLASS32)
482 {
483 if (bed->elf_machine_code == EM_X86_64)
484 {
485 prstatusx32_t prstat;
486 memset (&prstat, 0, sizeof (prstat));
487 prstat.pr_pid = pid;
488 prstat.pr_cursig = cursig;
489 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK
490 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
491 &prstat, sizeof (prstat));
8fd79e71
L
492 }
493 else
494 {
495 prstatus32_t prstat;
496 memset (&prstat, 0, sizeof (prstat));
497 prstat.pr_pid = pid;
498 prstat.pr_cursig = cursig;
499 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK
500 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
501 &prstat, sizeof (prstat));
8fd79e71
L
502 }
503 }
504 else
505 {
b1bd052d 506 prstatus64_t prstat;
8fd79e71
L
507 memset (&prstat, 0, sizeof (prstat));
508 prstat.pr_pid = pid;
509 prstat.pr_cursig = cursig;
510 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK
511 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
512 &prstat, sizeof (prstat));
8fd79e71 513 }
8fd79e71 514 }
e85c6a70 515 /* NOTREACHED */
8fd79e71
L
516}
517#endif
3bab7989 518\f
407443a3 519/* Functions for the x86-64 ELF linker. */
70256ad8 520
407443a3 521/* The name of the dynamic interpreter. This is put in the .interp
70256ad8
AJ
522 section. */
523
351f65ca 524#define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
eec9dd95 525#define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
70256ad8 526
d40d037c
AJ
527/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
530 shared lib. */
531#define ELIMINATE_COPY_RELOCS 1
532
70256ad8
AJ
533/* The size in bytes of an entry in the global offset table. */
534
535#define GOT_ENTRY_SIZE 8
8d88c4ca 536
70256ad8 537/* The size in bytes of an entry in the procedure linkage table. */
8d88c4ca 538
70256ad8
AJ
539#define PLT_ENTRY_SIZE 16
540
541/* The first entry in a procedure linkage table looks like this. See the
542 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
543
351f65ca 544static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
70256ad8 545{
653165cc
AJ
546 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
547 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
10efb593 548 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
70256ad8
AJ
549};
550
551/* Subsequent entries in a procedure linkage table look like this. */
552
351f65ca 553static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
70256ad8 554{
653165cc 555 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
407443a3 556 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653165cc 557 0x68, /* pushq immediate */
70256ad8
AJ
558 0, 0, 0, 0, /* replaced with index into relocation table. */
559 0xe9, /* jmp relative */
560 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
561};
562
0ff2b86e
L
563/* The first entry in a procedure linkage table with BND relocations
564 like this. */
565
566static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] =
567{
568 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
569 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
570 0x0f, 0x1f, 0 /* nopl (%rax) */
571};
572
573/* Subsequent entries for legacy branches in a procedure linkage table
574 with BND relocations look like this. */
575
576static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] =
577{
578 0x68, 0, 0, 0, 0, /* pushq immediate */
579 0xe9, 0, 0, 0, 0, /* jmpq relative */
580 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
581};
582
583/* Subsequent entries for branches with BND prefx in a procedure linkage
584 table with BND relocations look like this. */
585
586static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] =
587{
588 0x68, 0, 0, 0, 0, /* pushq immediate */
589 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
590 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
591};
592
593/* Entries for legacy branches in the second procedure linkage table
594 look like this. */
595
596static const bfd_byte elf_x86_64_legacy_plt2_entry[8] =
597{
598 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
599 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
601};
602
603/* Entries for branches with BND prefix in the second procedure linkage
604 table look like this. */
605
606static const bfd_byte elf_x86_64_bnd_plt2_entry[8] =
607{
608 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
609 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
610 0x90 /* nop */
611};
612
e41b3a13
JJ
613/* .eh_frame covering the .plt section. */
614
615static const bfd_byte elf_x86_64_eh_frame_plt[] =
616{
617#define PLT_CIE_LENGTH 20
618#define PLT_FDE_LENGTH 36
619#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
620#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
621 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
622 0, 0, 0, 0, /* CIE ID */
623 1, /* CIE version */
624 'z', 'R', 0, /* Augmentation string */
625 1, /* Code alignment factor */
626 0x78, /* Data alignment factor */
627 16, /* Return address column */
628 1, /* Augmentation size */
629 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
630 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
631 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
632 DW_CFA_nop, DW_CFA_nop,
633
634 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
635 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
636 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
637 0, 0, 0, 0, /* .plt size goes here */
638 0, /* Augmentation size */
639 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
640 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
641 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
642 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
643 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
644 11, /* Block length */
645 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
646 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
647 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
648 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
649 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
650};
651
eed180f8
RM
652/* Architecture-specific backend data for x86-64. */
653
654struct elf_x86_64_backend_data
655{
656 /* Templates for the initial PLT entry and for subsequent entries. */
657 const bfd_byte *plt0_entry;
658 const bfd_byte *plt_entry;
659 unsigned int plt_entry_size; /* Size of each PLT entry. */
660
661 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
662 unsigned int plt0_got1_offset;
663 unsigned int plt0_got2_offset;
664
665 /* Offset of the end of the PC-relative instruction containing
666 plt0_got2_offset. */
667 unsigned int plt0_got2_insn_end;
668
669 /* Offsets into plt_entry that are to be replaced with... */
670 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
671 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
672 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
673
674 /* Length of the PC-relative instruction containing plt_got_offset. */
675 unsigned int plt_got_insn_size;
676
677 /* Offset of the end of the PC-relative jump to plt0_entry. */
678 unsigned int plt_plt_insn_end;
679
680 /* Offset into plt_entry where the initial value of the GOT entry points. */
681 unsigned int plt_lazy_offset;
682
683 /* .eh_frame covering the .plt section. */
684 const bfd_byte *eh_frame_plt;
685 unsigned int eh_frame_plt_size;
686};
687
f8222080
L
688#define get_elf_x86_64_arch_data(bed) \
689 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
690
eed180f8 691#define get_elf_x86_64_backend_data(abfd) \
f8222080 692 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
eed180f8
RM
693
694#define GET_PLT_ENTRY_SIZE(abfd) \
695 get_elf_x86_64_backend_data (abfd)->plt_entry_size
696
697/* These are the standard parameters. */
698static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
699 {
700 elf_x86_64_plt0_entry, /* plt0_entry */
701 elf_x86_64_plt_entry, /* plt_entry */
702 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
703 2, /* plt0_got1_offset */
704 8, /* plt0_got2_offset */
705 12, /* plt0_got2_insn_end */
706 2, /* plt_got_offset */
707 7, /* plt_reloc_offset */
708 12, /* plt_plt_offset */
709 6, /* plt_got_insn_size */
710 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
711 6, /* plt_lazy_offset */
712 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
713 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
714 };
715
0ff2b86e
L
716static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed =
717 {
718 elf_x86_64_bnd_plt0_entry, /* plt0_entry */
719 elf_x86_64_bnd_plt_entry, /* plt_entry */
720 sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */
721 2, /* plt0_got1_offset */
722 1+8, /* plt0_got2_offset */
723 1+12, /* plt0_got2_insn_end */
724 1+2, /* plt_got_offset */
725 1, /* plt_reloc_offset */
726 7, /* plt_plt_offset */
727 1+6, /* plt_got_insn_size */
728 11, /* plt_plt_insn_end */
729 0, /* plt_lazy_offset */
730 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
731 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
732 };
733
eed180f8
RM
734#define elf_backend_arch_data &elf_x86_64_arch_bed
735
70256ad8
AJ
736/* x86-64 ELF linker hash entry. */
737
351f65ca 738struct elf_x86_64_link_hash_entry
70256ad8 739{
c434dee6 740 struct elf_link_hash_entry elf;
70256ad8 741
c434dee6 742 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 743 struct elf_dyn_relocs *dyn_relocs;
bffbf940
JJ
744
745#define GOT_UNKNOWN 0
746#define GOT_NORMAL 1
747#define GOT_TLS_GD 2
748#define GOT_TLS_IE 3
67a4f2b7
AO
749#define GOT_TLS_GDESC 4
750#define GOT_TLS_GD_BOTH_P(type) \
751 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
752#define GOT_TLS_GD_P(type) \
753 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
754#define GOT_TLS_GDESC_P(type) \
755 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
756#define GOT_TLS_GD_ANY_P(type) \
757 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
bffbf940 758 unsigned char tls_type;
67a4f2b7 759
0ff2b86e
L
760 /* TRUE if symbol has at least one BND relocation. */
761 bfd_boolean has_bnd_reloc;
762
763 /* Information about the second PLT entry. Filled when has_bnd_reloc is
764 set. */
765 union gotplt_union plt_bnd;
766
67a4f2b7
AO
767 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
768 starting at the end of the jump table. */
769 bfd_vma tlsdesc_got;
bffbf940
JJ
770};
771
351f65ca
L
772#define elf_x86_64_hash_entry(ent) \
773 ((struct elf_x86_64_link_hash_entry *)(ent))
bffbf940 774
351f65ca 775struct elf_x86_64_obj_tdata
bffbf940
JJ
776{
777 struct elf_obj_tdata root;
778
779 /* tls_type for each local got entry. */
780 char *local_got_tls_type;
67a4f2b7
AO
781
782 /* GOTPLT entries for TLS descriptors. */
783 bfd_vma *local_tlsdesc_gotent;
70256ad8
AJ
784};
785
351f65ca
L
786#define elf_x86_64_tdata(abfd) \
787 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
bffbf940 788
351f65ca
L
789#define elf_x86_64_local_got_tls_type(abfd) \
790 (elf_x86_64_tdata (abfd)->local_got_tls_type)
bffbf940 791
351f65ca
L
792#define elf_x86_64_local_tlsdesc_gotent(abfd) \
793 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
bffbf940 794
0ffa91dd
NC
795#define is_x86_64_elf(bfd) \
796 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
797 && elf_tdata (bfd) != NULL \
4dfe6ac6 798 && elf_object_id (bfd) == X86_64_ELF_DATA)
0ffa91dd
NC
799
800static bfd_boolean
351f65ca 801elf_x86_64_mkobject (bfd *abfd)
0ffa91dd 802{
351f65ca 803 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
4dfe6ac6 804 X86_64_ELF_DATA);
0ffa91dd
NC
805}
806
c434dee6 807/* x86-64 ELF linker hash table. */
8d88c4ca 808
351f65ca 809struct elf_x86_64_link_hash_table
407443a3 810{
c434dee6 811 struct elf_link_hash_table elf;
70256ad8 812
c434dee6 813 /* Short-cuts to get to dynamic linker sections. */
c434dee6
AJ
814 asection *sdynbss;
815 asection *srelbss;
e41b3a13 816 asection *plt_eh_frame;
0ff2b86e 817 asection *plt_bnd;
70256ad8 818
4dfe6ac6
NC
819 union
820 {
bffbf940
JJ
821 bfd_signed_vma refcount;
822 bfd_vma offset;
823 } tls_ld_got;
824
67a4f2b7
AO
825 /* The amount of space used by the jump slots in the GOT. */
826 bfd_vma sgotplt_jump_table_size;
827
87d72d41
AM
828 /* Small local sym cache. */
829 struct sym_cache sym_cache;
9f03412a 830
351f65ca
L
831 bfd_vma (*r_info) (bfd_vma, bfd_vma);
832 bfd_vma (*r_sym) (bfd_vma);
248775ba 833 unsigned int pointer_r_type;
351f65ca
L
834 const char *dynamic_interpreter;
835 int dynamic_interpreter_size;
836
9f03412a
AO
837 /* _TLS_MODULE_BASE_ symbol. */
838 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L
839
840 /* Used by local STT_GNU_IFUNC symbols. */
841 htab_t loc_hash_table;
4dfe6ac6
NC
842 void * loc_hash_memory;
843
844 /* The offset into splt of the PLT entry for the TLS descriptor
845 resolver. Special values are 0, if not necessary (or not found
846 to be necessary yet), and -1 if needed but not determined
847 yet. */
848 bfd_vma tlsdesc_plt;
849 /* The offset into sgot of the GOT entry used by the PLT entry
850 above. */
851 bfd_vma tlsdesc_got;
e1f98742
L
852
853 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
854 bfd_vma next_jump_slot_index;
855 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
856 bfd_vma next_irelative_index;
c434dee6 857};
70256ad8
AJ
858
859/* Get the x86-64 ELF linker hash table from a link_info structure. */
8d88c4ca 860
351f65ca 861#define elf_x86_64_hash_table(p) \
4dfe6ac6 862 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
351f65ca 863 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
8d88c4ca 864
351f65ca 865#define elf_x86_64_compute_jump_table_size(htab) \
6de2ae4a 866 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
67a4f2b7 867
407443a3 868/* Create an entry in an x86-64 ELF linker hash table. */
70256ad8
AJ
869
870static struct bfd_hash_entry *
351f65ca
L
871elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
872 struct bfd_hash_table *table,
873 const char *string)
70256ad8 874{
70256ad8 875 /* Allocate the structure if it has not already been allocated by a
c434dee6
AJ
876 subclass. */
877 if (entry == NULL)
878 {
a50b1753 879 entry = (struct bfd_hash_entry *)
eed180f8
RM
880 bfd_hash_allocate (table,
881 sizeof (struct elf_x86_64_link_hash_entry));
c434dee6
AJ
882 if (entry == NULL)
883 return entry;
884 }
70256ad8
AJ
885
886 /* Call the allocation method of the superclass. */
c434dee6
AJ
887 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
888 if (entry != NULL)
70256ad8 889 {
351f65ca 890 struct elf_x86_64_link_hash_entry *eh;
c434dee6 891
351f65ca 892 eh = (struct elf_x86_64_link_hash_entry *) entry;
c434dee6 893 eh->dyn_relocs = NULL;
bffbf940 894 eh->tls_type = GOT_UNKNOWN;
0ff2b86e
L
895 eh->has_bnd_reloc = FALSE;
896 eh->plt_bnd.offset = (bfd_vma) -1;
67a4f2b7 897 eh->tlsdesc_got = (bfd_vma) -1;
70256ad8
AJ
898 }
899
c434dee6 900 return entry;
70256ad8
AJ
901}
902
c25bc9fc
L
903/* Compute a hash of a local hash entry. We use elf_link_hash_entry
904 for local symbol so that we can handle local STT_GNU_IFUNC symbols
905 as global symbol. We reuse indx and dynstr_index for local symbol
906 hash since they aren't used by global symbols in this backend. */
907
908static hashval_t
351f65ca 909elf_x86_64_local_htab_hash (const void *ptr)
c25bc9fc
L
910{
911 struct elf_link_hash_entry *h
912 = (struct elf_link_hash_entry *) ptr;
d2149d72 913 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L
914}
915
916/* Compare local hash entries. */
917
918static int
351f65ca 919elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
c25bc9fc
L
920{
921 struct elf_link_hash_entry *h1
922 = (struct elf_link_hash_entry *) ptr1;
923 struct elf_link_hash_entry *h2
924 = (struct elf_link_hash_entry *) ptr2;
925
926 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
927}
928
929/* Find and/or create a hash entry for local symbol. */
930
931static struct elf_link_hash_entry *
351f65ca
L
932elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
933 bfd *abfd, const Elf_Internal_Rela *rel,
934 bfd_boolean create)
c25bc9fc 935{
351f65ca 936 struct elf_x86_64_link_hash_entry e, *ret;
c25bc9fc 937 asection *sec = abfd->sections;
d2149d72 938 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
351f65ca 939 htab->r_sym (rel->r_info));
c25bc9fc
L
940 void **slot;
941
942 e.elf.indx = sec->id;
351f65ca 943 e.elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc
L
944 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
945 create ? INSERT : NO_INSERT);
946
947 if (!slot)
948 return NULL;
949
950 if (*slot)
951 {
351f65ca 952 ret = (struct elf_x86_64_link_hash_entry *) *slot;
c25bc9fc
L
953 return &ret->elf;
954 }
955
351f65ca 956 ret = (struct elf_x86_64_link_hash_entry *)
c25bc9fc 957 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
351f65ca 958 sizeof (struct elf_x86_64_link_hash_entry));
c25bc9fc
L
959 if (ret)
960 {
961 memset (ret, 0, sizeof (*ret));
962 ret->elf.indx = sec->id;
351f65ca 963 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc 964 ret->elf.dynindx = -1;
c25bc9fc
L
965 *slot = ret;
966 }
967 return &ret->elf;
968}
969
68faa637
AM
970/* Destroy an X86-64 ELF linker hash table. */
971
972static void
d495ab0d 973elf_x86_64_link_hash_table_free (bfd *obfd)
68faa637
AM
974{
975 struct elf_x86_64_link_hash_table *htab
d495ab0d 976 = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
68faa637
AM
977
978 if (htab->loc_hash_table)
979 htab_delete (htab->loc_hash_table);
980 if (htab->loc_hash_memory)
981 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
d495ab0d 982 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM
983}
984
8d88c4ca
NC
985/* Create an X86-64 ELF linker hash table. */
986
987static struct bfd_link_hash_table *
351f65ca 988elf_x86_64_link_hash_table_create (bfd *abfd)
8d88c4ca 989{
351f65ca
L
990 struct elf_x86_64_link_hash_table *ret;
991 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
8d88c4ca 992
7bf52ea2 993 ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
c434dee6 994 if (ret == NULL)
8d88c4ca
NC
995 return NULL;
996
eb4ff4d6 997 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
351f65ca
L
998 elf_x86_64_link_hash_newfunc,
999 sizeof (struct elf_x86_64_link_hash_entry),
4dfe6ac6 1000 X86_64_ELF_DATA))
8d88c4ca 1001 {
e2d34d7d 1002 free (ret);
8d88c4ca
NC
1003 return NULL;
1004 }
1005
351f65ca
L
1006 if (ABI_64_P (abfd))
1007 {
1008 ret->r_info = elf64_r_info;
1009 ret->r_sym = elf64_r_sym;
248775ba 1010 ret->pointer_r_type = R_X86_64_64;
351f65ca
L
1011 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1012 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1013 }
1014 else
1015 {
1016 ret->r_info = elf32_r_info;
1017 ret->r_sym = elf32_r_sym;
248775ba 1018 ret->pointer_r_type = R_X86_64_32;
351f65ca
L
1019 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1020 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1021 }
1022
c25bc9fc 1023 ret->loc_hash_table = htab_try_create (1024,
351f65ca
L
1024 elf_x86_64_local_htab_hash,
1025 elf_x86_64_local_htab_eq,
c25bc9fc
L
1026 NULL);
1027 ret->loc_hash_memory = objalloc_create ();
1028 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1029 {
d495ab0d 1030 elf_x86_64_link_hash_table_free (abfd);
c25bc9fc
L
1031 return NULL;
1032 }
d495ab0d 1033 ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
c25bc9fc 1034
c434dee6
AJ
1035 return &ret->elf.root;
1036}
1037
c434dee6
AJ
1038/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1039 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1040 hash table. */
1041
b34976b6 1042static bfd_boolean
351f65ca
L
1043elf_x86_64_create_dynamic_sections (bfd *dynobj,
1044 struct bfd_link_info *info)
c434dee6 1045{
351f65ca 1046 struct elf_x86_64_link_hash_table *htab;
c434dee6 1047
c434dee6 1048 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 1049 return FALSE;
c434dee6 1050
351f65ca 1051 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
1052 if (htab == NULL)
1053 return FALSE;
1054
3d4d4302 1055 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
c434dee6 1056 if (!info->shared)
3d4d4302 1057 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
c434dee6 1058
6de2ae4a 1059 if (!htab->sdynbss
c434dee6
AJ
1060 || (!info->shared && !htab->srelbss))
1061 abort ();
1062
e41b3a13 1063 if (!info->no_ld_generated_unwind_info
2fe0fd06 1064 && htab->plt_eh_frame == NULL
e4de50d4 1065 && htab->elf.splt != NULL)
e41b3a13 1066 {
bbf96e4e
L
1067 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1068 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1069 | SEC_LINKER_CREATED);
e41b3a13 1070 htab->plt_eh_frame
bbf96e4e 1071 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ
1072 if (htab->plt_eh_frame == NULL
1073 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
1074 return FALSE;
e41b3a13 1075 }
b34976b6 1076 return TRUE;
c434dee6
AJ
1077}
1078
1079/* Copy the extra info we tack onto an elf_link_hash_entry. */
1080
1081static void
351f65ca
L
1082elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1083 struct elf_link_hash_entry *dir,
1084 struct elf_link_hash_entry *ind)
c434dee6 1085{
351f65ca 1086 struct elf_x86_64_link_hash_entry *edir, *eind;
c434dee6 1087
351f65ca
L
1088 edir = (struct elf_x86_64_link_hash_entry *) dir;
1089 eind = (struct elf_x86_64_link_hash_entry *) ind;
c434dee6 1090
0ff2b86e
L
1091 if (!edir->has_bnd_reloc)
1092 edir->has_bnd_reloc = eind->has_bnd_reloc;
1093
c434dee6
AJ
1094 if (eind->dyn_relocs != NULL)
1095 {
1096 if (edir->dyn_relocs != NULL)
1097 {
e03a8ed8
L
1098 struct elf_dyn_relocs **pp;
1099 struct elf_dyn_relocs *p;
c434dee6 1100
fcfa13d2 1101 /* Add reloc counts against the indirect sym to the direct sym
c434dee6
AJ
1102 list. Merge any entries against the same section. */
1103 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1104 {
e03a8ed8 1105 struct elf_dyn_relocs *q;
c434dee6
AJ
1106
1107 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1108 if (q->sec == p->sec)
1109 {
1110 q->pc_count += p->pc_count;
1111 q->count += p->count;
1112 *pp = p->next;
1113 break;
1114 }
1115 if (q == NULL)
1116 pp = &p->next;
1117 }
1118 *pp = edir->dyn_relocs;
1119 }
1120
1121 edir->dyn_relocs = eind->dyn_relocs;
1122 eind->dyn_relocs = NULL;
1123 }
1124
bffbf940
JJ
1125 if (ind->root.type == bfd_link_hash_indirect
1126 && dir->got.refcount <= 0)
1127 {
1128 edir->tls_type = eind->tls_type;
1129 eind->tls_type = GOT_UNKNOWN;
1130 }
1131
d40d037c
AJ
1132 if (ELIMINATE_COPY_RELOCS
1133 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM
1134 && dir->dynamic_adjusted)
1135 {
1136 /* If called to transfer flags for a weakdef during processing
1137 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1138 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1139 dir->ref_dynamic |= ind->ref_dynamic;
1140 dir->ref_regular |= ind->ref_regular;
1141 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1142 dir->needs_plt |= ind->needs_plt;
1143 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1144 }
d40d037c 1145 else
fcfa13d2 1146 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
8d88c4ca
NC
1147}
1148
b34976b6 1149static bfd_boolean
27482721 1150elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940 1151{
8d88c4ca
NC
1152 /* Set the right machine number for an x86-64 elf64 file. */
1153 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 1154 return TRUE;
8d88c4ca
NC
1155}
1156
8059fb19
RM
1157static bfd_boolean
1158elf32_x86_64_elf_object_p (bfd *abfd)
1159{
1160 /* Set the right machine number for an x86-64 elf32 file. */
1161 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1162 return TRUE;
1163}
1164
142411ca
L
1165/* Return TRUE if the TLS access code sequence support transition
1166 from R_TYPE. */
1167
1168static bfd_boolean
351f65ca
L
1169elf_x86_64_check_tls_transition (bfd *abfd,
1170 struct bfd_link_info *info,
1171 asection *sec,
1172 bfd_byte *contents,
1173 Elf_Internal_Shdr *symtab_hdr,
1174 struct elf_link_hash_entry **sym_hashes,
1175 unsigned int r_type,
1176 const Elf_Internal_Rela *rel,
1177 const Elf_Internal_Rela *relend)
bffbf940 1178{
142411ca
L
1179 unsigned int val;
1180 unsigned long r_symndx;
5c98a14e 1181 bfd_boolean largepic = FALSE;
142411ca
L
1182 struct elf_link_hash_entry *h;
1183 bfd_vma offset;
351f65ca 1184 struct elf_x86_64_link_hash_table *htab;
142411ca
L
1185
1186 /* Get the section contents. */
1187 if (contents == NULL)
1188 {
1189 if (elf_section_data (sec)->this_hdr.contents != NULL)
1190 contents = elf_section_data (sec)->this_hdr.contents;
1191 else
1192 {
1193 /* FIXME: How to better handle error condition? */
1194 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1195 return FALSE;
bffbf940 1196
142411ca
L
1197 /* Cache the section contents for elf_link_input_bfd. */
1198 elf_section_data (sec)->this_hdr.contents = contents;
1199 }
1200 }
1201
351f65ca 1202 htab = elf_x86_64_hash_table (info);
142411ca 1203 offset = rel->r_offset;
bffbf940 1204 switch (r_type)
142411ca
L
1205 {
1206 case R_X86_64_TLSGD:
1207 case R_X86_64_TLSLD:
1208 if ((rel + 1) >= relend)
1209 return FALSE;
1210
1211 if (r_type == R_X86_64_TLSGD)
1212 {
52bc799a 1213 /* Check transition from GD access model. For 64bit, only
142411ca
L
1214 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1215 .word 0x6666; rex64; call __tls_get_addr
52bc799a
L
1216 can transit to different access model. For 32bit, only
1217 leaq foo@tlsgd(%rip), %rdi
1218 .word 0x6666; rex64; call __tls_get_addr
5c98a14e
JJ
1219 can transit to different access model. For largepic
1220 we also support:
1221 leaq foo@tlsgd(%rip), %rdi
1222 movabsq $__tls_get_addr@pltoff, %rax
1223 addq $rbx, %rax
1224 call *%rax. */
142411ca 1225
fa289a5f
AM
1226 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1227 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1228
5c98a14e 1229 if ((offset + 12) > sec->size)
142411ca 1230 return FALSE;
52bc799a 1231
5c98a14e
JJ
1232 if (memcmp (contents + offset + 4, call, 4) != 0)
1233 {
1234 if (!ABI_64_P (abfd)
1235 || (offset + 19) > sec->size
1236 || offset < 3
1237 || memcmp (contents + offset - 3, leaq + 1, 3) != 0
1238 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1239 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1240 != 0)
1241 return FALSE;
1242 largepic = TRUE;
1243 }
1244 else if (ABI_64_P (abfd))
52bc799a 1245 {
52bc799a 1246 if (offset < 4
fa289a5f 1247 || memcmp (contents + offset - 4, leaq, 4) != 0)
52bc799a
L
1248 return FALSE;
1249 }
1250 else
1251 {
52bc799a 1252 if (offset < 3
fa289a5f 1253 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
52bc799a
L
1254 return FALSE;
1255 }
142411ca
L
1256 }
1257 else
1258 {
1259 /* Check transition from LD access model. Only
1260 leaq foo@tlsld(%rip), %rdi;
1261 call __tls_get_addr
5c98a14e
JJ
1262 can transit to different access model. For largepic
1263 we also support:
1264 leaq foo@tlsld(%rip), %rdi
1265 movabsq $__tls_get_addr@pltoff, %rax
1266 addq $rbx, %rax
1267 call *%rax. */
142411ca 1268
fa289a5f 1269 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
142411ca
L
1270
1271 if (offset < 3 || (offset + 9) > sec->size)
1272 return FALSE;
1273
5c98a14e 1274 if (memcmp (contents + offset - 3, lea, 3) != 0)
142411ca 1275 return FALSE;
5c98a14e
JJ
1276
1277 if (0xe8 != *(contents + offset + 4))
1278 {
1279 if (!ABI_64_P (abfd)
1280 || (offset + 19) > sec->size
1281 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1282 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1283 != 0)
1284 return FALSE;
1285 largepic = TRUE;
1286 }
142411ca
L
1287 }
1288
351f65ca 1289 r_symndx = htab->r_sym (rel[1].r_info);
142411ca
L
1290 if (r_symndx < symtab_hdr->sh_info)
1291 return FALSE;
1292
1293 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b 1294 /* Use strncmp to check __tls_get_addr since __tls_get_addr
eed180f8 1295 may be versioned. */
142411ca
L
1296 return (h != NULL
1297 && h->root.root.string != NULL
5c98a14e
JJ
1298 && (largepic
1299 ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64
1300 : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1301 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32))
c4fb387b
L
1302 && (strncmp (h->root.root.string,
1303 "__tls_get_addr", 14) == 0));
142411ca
L
1304
1305 case R_X86_64_GOTTPOFF:
1306 /* Check transition from IE access model:
4a4c5f25
L
1307 mov foo@gottpoff(%rip), %reg
1308 add foo@gottpoff(%rip), %reg
142411ca
L
1309 */
1310
4a4c5f25
L
1311 /* Check REX prefix first. */
1312 if (offset >= 3 && (offset + 4) <= sec->size)
1313 {
1314 val = bfd_get_8 (abfd, contents + offset - 3);
1315 if (val != 0x48 && val != 0x4c)
1316 {
1317 /* X32 may have 0x44 REX prefix or no REX prefix. */
1318 if (ABI_64_P (abfd))
1319 return FALSE;
1320 }
1321 }
1322 else
1323 {
1324 /* X32 may not have any REX prefix. */
1325 if (ABI_64_P (abfd))
1326 return FALSE;
1327 if (offset < 2 || (offset + 3) > sec->size)
1328 return FALSE;
1329 }
142411ca
L
1330
1331 val = bfd_get_8 (abfd, contents + offset - 2);
1332 if (val != 0x8b && val != 0x03)
1333 return FALSE;
1334
1335 val = bfd_get_8 (abfd, contents + offset - 1);
1336 return (val & 0xc7) == 5;
1337
1338 case R_X86_64_GOTPC32_TLSDESC:
1339 /* Check transition from GDesc access model:
1340 leaq x@tlsdesc(%rip), %rax
1341
1342 Make sure it's a leaq adding rip to a 32-bit offset
1343 into any register, although it's probably almost always
1344 going to be rax. */
1345
1346 if (offset < 3 || (offset + 4) > sec->size)
1347 return FALSE;
1348
1349 val = bfd_get_8 (abfd, contents + offset - 3);
1350 if ((val & 0xfb) != 0x48)
1351 return FALSE;
1352
1353 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1354 return FALSE;
1355
1356 val = bfd_get_8 (abfd, contents + offset - 1);
1357 return (val & 0xc7) == 0x05;
1358
1359 case R_X86_64_TLSDESC_CALL:
1360 /* Check transition from GDesc access model:
1361 call *x@tlsdesc(%rax)
1362 */
1363 if (offset + 2 <= sec->size)
1364 {
1365 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM
1366 static const unsigned char call[] = { 0xff, 0x10 };
1367 return memcmp (contents + offset, call, 2) == 0;
142411ca
L
1368 }
1369
1370 return FALSE;
1371
1372 default:
1373 abort ();
1374 }
1375}
1376
1377/* Return TRUE if the TLS access transition is OK or no transition
1378 will be performed. Update R_TYPE if there is a transition. */
1379
1380static bfd_boolean
351f65ca
L
1381elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1382 asection *sec, bfd_byte *contents,
1383 Elf_Internal_Shdr *symtab_hdr,
1384 struct elf_link_hash_entry **sym_hashes,
1385 unsigned int *r_type, int tls_type,
1386 const Elf_Internal_Rela *rel,
1387 const Elf_Internal_Rela *relend,
1388 struct elf_link_hash_entry *h,
1389 unsigned long r_symndx)
142411ca
L
1390{
1391 unsigned int from_type = *r_type;
1392 unsigned int to_type = from_type;
1393 bfd_boolean check = TRUE;
1394
bb1cb422
L
1395 /* Skip TLS transition for functions. */
1396 if (h != NULL
1397 && (h->type == STT_FUNC
1398 || h->type == STT_GNU_IFUNC))
1399 return TRUE;
1400
142411ca 1401 switch (from_type)
bffbf940
JJ
1402 {
1403 case R_X86_64_TLSGD:
67a4f2b7
AO
1404 case R_X86_64_GOTPC32_TLSDESC:
1405 case R_X86_64_TLSDESC_CALL:
bffbf940 1406 case R_X86_64_GOTTPOFF:
1d85728f 1407 if (info->executable)
142411ca
L
1408 {
1409 if (h == NULL)
1410 to_type = R_X86_64_TPOFF32;
1411 else
1412 to_type = R_X86_64_GOTTPOFF;
1413 }
1414
351f65ca 1415 /* When we are called from elf_x86_64_relocate_section,
142411ca
L
1416 CONTENTS isn't NULL and there may be additional transitions
1417 based on TLS_TYPE. */
1418 if (contents != NULL)
1419 {
1420 unsigned int new_to_type = to_type;
1421
1d85728f 1422 if (info->executable
142411ca
L
1423 && h != NULL
1424 && h->dynindx == -1
1425 && tls_type == GOT_TLS_IE)
1426 new_to_type = R_X86_64_TPOFF32;
1427
1428 if (to_type == R_X86_64_TLSGD
1429 || to_type == R_X86_64_GOTPC32_TLSDESC
1430 || to_type == R_X86_64_TLSDESC_CALL)
1431 {
1432 if (tls_type == GOT_TLS_IE)
1433 new_to_type = R_X86_64_GOTTPOFF;
1434 }
1435
1436 /* We checked the transition before when we were called from
351f65ca 1437 elf_x86_64_check_relocs. We only want to check the new
142411ca
L
1438 transition which hasn't been checked before. */
1439 check = new_to_type != to_type && from_type == to_type;
1440 to_type = new_to_type;
1441 }
1442
1443 break;
1444
bffbf940 1445 case R_X86_64_TLSLD:
1d85728f 1446 if (info->executable)
142411ca
L
1447 to_type = R_X86_64_TPOFF32;
1448 break;
1449
1450 default:
1451 return TRUE;
bffbf940
JJ
1452 }
1453
142411ca
L
1454 /* Return TRUE if there is no transition. */
1455 if (from_type == to_type)
1456 return TRUE;
1457
1458 /* Check if the transition can be performed. */
1459 if (check
351f65ca
L
1460 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1461 symtab_hdr, sym_hashes,
1462 from_type, rel, relend))
142411ca 1463 {
2f629d23 1464 reloc_howto_type *from, *to;
4c544807 1465 const char *name;
142411ca 1466
351f65ca
L
1467 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1468 to = elf_x86_64_rtype_to_howto (abfd, to_type);
142411ca 1469
4c544807
L
1470 if (h)
1471 name = h->root.root.string;
1472 else
1473 {
351f65ca 1474 struct elf_x86_64_link_hash_table *htab;
4dfe6ac6 1475
351f65ca 1476 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
1477 if (htab == NULL)
1478 name = "*unknown*";
1479 else
1480 {
1481 Elf_Internal_Sym *isym;
1482
1483 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1484 abfd, r_symndx);
1485 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1486 }
4c544807
L
1487 }
1488
142411ca
L
1489 (*_bfd_error_handler)
1490 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1491 "in section `%A' failed"),
4c544807 1492 abfd, sec, from->name, to->name, name,
142411ca
L
1493 (unsigned long) rel->r_offset);
1494 bfd_set_error (bfd_error_bad_value);
1495 return FALSE;
1496 }
1497
1498 *r_type = to_type;
1499 return TRUE;
bffbf940
JJ
1500}
1501
70256ad8 1502/* Look through the relocs for a section during the first phase, and
c434dee6
AJ
1503 calculate needed space in the global offset table, procedure
1504 linkage table, and dynamic reloc sections. */
70256ad8 1505
b34976b6 1506static bfd_boolean
351f65ca
L
1507elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1508 asection *sec,
1509 const Elf_Internal_Rela *relocs)
70256ad8 1510{
351f65ca 1511 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ
1512 Elf_Internal_Shdr *symtab_hdr;
1513 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ
1514 const Elf_Internal_Rela *rel;
1515 const Elf_Internal_Rela *rel_end;
70256ad8
AJ
1516 asection *sreloc;
1517
1049f94e 1518 if (info->relocatable)
b34976b6 1519 return TRUE;
70256ad8 1520
0ffa91dd
NC
1521 BFD_ASSERT (is_x86_64_elf (abfd));
1522
351f65ca 1523 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
1524 if (htab == NULL)
1525 return FALSE;
1526
0ffa91dd 1527 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8 1528 sym_hashes = elf_sym_hashes (abfd);
70256ad8 1529
c434dee6 1530 sreloc = NULL;
cbe950e9 1531
70256ad8
AJ
1532 rel_end = relocs + sec->reloc_count;
1533 for (rel = relocs; rel < rel_end; rel++)
1534 {
bffbf940 1535 unsigned int r_type;
70256ad8
AJ
1536 unsigned long r_symndx;
1537 struct elf_link_hash_entry *h;
4c544807
L
1538 Elf_Internal_Sym *isym;
1539 const char *name;
06a6a421 1540 bfd_boolean size_reloc;
70256ad8 1541
351f65ca
L
1542 r_symndx = htab->r_sym (rel->r_info);
1543 r_type = ELF32_R_TYPE (rel->r_info);
c434dee6
AJ
1544
1545 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1546 {
d003868e
AM
1547 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1548 abfd, r_symndx);
b34976b6 1549 return FALSE;
c434dee6
AJ
1550 }
1551
70256ad8 1552 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L
1553 {
1554 /* A local symbol. */
c2e61a4e
L
1555 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1556 abfd, r_symndx);
1557 if (isym == NULL)
1558 return FALSE;
c25bc9fc
L
1559
1560 /* Check relocation against local STT_GNU_IFUNC symbol. */
351f65ca 1561 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
c25bc9fc 1562 {
351f65ca
L
1563 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1564 TRUE);
c25bc9fc 1565 if (h == NULL)
c2e61a4e 1566 return FALSE;
6bbec505 1567
c25bc9fc
L
1568 /* Fake a STT_GNU_IFUNC symbol. */
1569 h->type = STT_GNU_IFUNC;
1570 h->def_regular = 1;
1571 h->ref_regular = 1;
1572 h->forced_local = 1;
1573 h->root.type = bfd_link_hash_defined;
1574 }
1575 else
1576 h = NULL;
1577 }
70256ad8 1578 else
71cb9464 1579 {
4c544807 1580 isym = NULL;
71cb9464
L
1581 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1582 while (h->root.type == bfd_link_hash_indirect
1583 || h->root.type == bfd_link_hash_warning)
1584 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1585 }
cbe950e9 1586
d1534d16
L
1587 /* Check invalid x32 relocations. */
1588 if (!ABI_64_P (abfd))
1589 switch (r_type)
1590 {
1591 default:
1592 break;
1593
d1534d16
L
1594 case R_X86_64_DTPOFF64:
1595 case R_X86_64_TPOFF64:
1596 case R_X86_64_PC64:
1597 case R_X86_64_GOTOFF64:
1598 case R_X86_64_GOT64:
1599 case R_X86_64_GOTPCREL64:
1600 case R_X86_64_GOTPC64:
1601 case R_X86_64_GOTPLT64:
1602 case R_X86_64_PLTOFF64:
1603 {
1604 if (h)
1605 name = h->root.root.string;
1606 else
1607 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1608 NULL);
1609 (*_bfd_error_handler)
1610 (_("%B: relocation %s against symbol `%s' isn't "
1611 "supported in x32 mode"), abfd,
1612 x86_64_elf_howto_table[r_type].name, name);
1613 bfd_set_error (bfd_error_bad_value);
1614 return FALSE;
1615 }
1616 break;
1617 }
1618
c25bc9fc
L
1619 if (h != NULL)
1620 {
cbe950e9
L
1621 /* Create the ifunc sections for static executables. If we
1622 never see an indirect function symbol nor we are building
1623 a static executable, those sections will be empty and
1624 won't appear in output. */
1625 switch (r_type)
1626 {
1627 default:
1628 break;
1629
0ff2b86e
L
1630 case R_X86_64_PC32_BND:
1631 case R_X86_64_PLT32_BND:
1632 /* MPX PLT is supported only if elf_x86_64_arch_bed
1633 is used in 64-bit mode. */
1634 if (ABI_64_P (abfd)
1635 && (get_elf_x86_64_backend_data (abfd)
1636 == &elf_x86_64_arch_bed))
1637 {
1638 elf_x86_64_hash_entry (h)->has_bnd_reloc = TRUE;
1639
1640 /* Create the second PLT for Intel MPX support. */
1641 if (htab->plt_bnd == NULL)
1642 {
1643 unsigned int plt_bnd_align;
1644 const struct elf_backend_data *bed;
1645
1646 bed = get_elf_backend_data (info->output_bfd);
1647 switch (sizeof (elf_x86_64_bnd_plt2_entry))
1648 {
1649 case 8:
1650 plt_bnd_align = 3;
1651 break;
1652 case 16:
1653 plt_bnd_align = 4;
1654 break;
1655 default:
1656 abort ();
1657 }
1658
1659 if (htab->elf.dynobj == NULL)
1660 htab->elf.dynobj = abfd;
1661 htab->plt_bnd
1662 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1663 ".plt.bnd",
1664 (bed->dynamic_sec_flags
1665 | SEC_ALLOC
1666 | SEC_CODE
1667 | SEC_LOAD
1668 | SEC_READONLY));
1669 if (htab->plt_bnd == NULL
1670 || !bfd_set_section_alignment (htab->elf.dynobj,
1671 htab->plt_bnd,
1672 plt_bnd_align))
1673 return FALSE;
1674 }
1675 }
1676
cbe950e9
L
1677 case R_X86_64_32S:
1678 case R_X86_64_32:
1679 case R_X86_64_64:
1680 case R_X86_64_PC32:
1681 case R_X86_64_PC64:
1682 case R_X86_64_PLT32:
1683 case R_X86_64_GOTPCREL:
1684 case R_X86_64_GOTPCREL64:
9d4057ee
AM
1685 if (htab->elf.dynobj == NULL)
1686 htab->elf.dynobj = abfd;
1687 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
c2e61a4e 1688 return FALSE;
cbe950e9
L
1689 break;
1690 }
1691
ad1e85de
L
1692 /* It is referenced by a non-shared object. */
1693 h->ref_regular = 1;
61315175 1694 h->root.non_ir_ref = 1;
71cb9464 1695 }
70256ad8 1696
351f65ca
L
1697 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1698 symtab_hdr, sym_hashes,
1699 &r_type, GOT_UNKNOWN,
1700 rel, rel_end, h, r_symndx))
c2e61a4e 1701 return FALSE;
142411ca 1702
bffbf940 1703 switch (r_type)
70256ad8 1704 {
bffbf940
JJ
1705 case R_X86_64_TLSLD:
1706 htab->tls_ld_got.refcount += 1;
1707 goto create_got;
1708
1709 case R_X86_64_TPOFF32:
351f65ca 1710 if (!info->executable && ABI_64_P (abfd))
70256ad8 1711 {
09a24cbf 1712 if (h)
4c544807
L
1713 name = h->root.root.string;
1714 else
1715 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1716 NULL);
bffbf940 1717 (*_bfd_error_handler)
d003868e
AM
1718 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1719 abfd,
4c544807 1720 x86_64_elf_howto_table[r_type].name, name);
bffbf940 1721 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1722 return FALSE;
70256ad8 1723 }
bffbf940 1724 break;
c434dee6 1725
bffbf940 1726 case R_X86_64_GOTTPOFF:
1d85728f 1727 if (!info->executable)
bffbf940
JJ
1728 info->flags |= DF_STATIC_TLS;
1729 /* Fall through */
70256ad8 1730
bffbf940
JJ
1731 case R_X86_64_GOT32:
1732 case R_X86_64_GOTPCREL:
1733 case R_X86_64_TLSGD:
7b81dfbb
AJ
1734 case R_X86_64_GOT64:
1735 case R_X86_64_GOTPCREL64:
1736 case R_X86_64_GOTPLT64:
67a4f2b7
AO
1737 case R_X86_64_GOTPC32_TLSDESC:
1738 case R_X86_64_TLSDESC_CALL:
bffbf940
JJ
1739 /* This symbol requires a global offset table entry. */
1740 {
1741 int tls_type, old_tls_type;
1742
1743 switch (r_type)
1744 {
1745 default: tls_type = GOT_NORMAL; break;
1746 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1747 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
67a4f2b7
AO
1748 case R_X86_64_GOTPC32_TLSDESC:
1749 case R_X86_64_TLSDESC_CALL:
1750 tls_type = GOT_TLS_GDESC; break;
bffbf940
JJ
1751 }
1752
1753 if (h != NULL)
1754 {
7b81dfbb
AJ
1755 if (r_type == R_X86_64_GOTPLT64)
1756 {
1757 /* This relocation indicates that we also need
1758 a PLT entry, as this is a function. We don't need
1759 a PLT entry for local symbols. */
1760 h->needs_plt = 1;
1761 h->plt.refcount += 1;
1762 }
bffbf940 1763 h->got.refcount += 1;
351f65ca 1764 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
bffbf940
JJ
1765 }
1766 else
1767 {
1768 bfd_signed_vma *local_got_refcounts;
1769
1770 /* This is a global offset table entry for a local symbol. */
1771 local_got_refcounts = elf_local_got_refcounts (abfd);
1772 if (local_got_refcounts == NULL)
1773 {
1774 bfd_size_type size;
1775
1776 size = symtab_hdr->sh_info;
67a4f2b7
AO
1777 size *= sizeof (bfd_signed_vma)
1778 + sizeof (bfd_vma) + sizeof (char);
bffbf940
JJ
1779 local_got_refcounts = ((bfd_signed_vma *)
1780 bfd_zalloc (abfd, size));
1781 if (local_got_refcounts == NULL)
c2e61a4e 1782 return FALSE;
bffbf940 1783 elf_local_got_refcounts (abfd) = local_got_refcounts;
351f65ca 1784 elf_x86_64_local_tlsdesc_gotent (abfd)
67a4f2b7 1785 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
351f65ca 1786 elf_x86_64_local_got_tls_type (abfd)
67a4f2b7 1787 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
bffbf940
JJ
1788 }
1789 local_got_refcounts[r_symndx] += 1;
1790 old_tls_type
351f65ca 1791 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
bffbf940
JJ
1792 }
1793
1794 /* If a TLS symbol is accessed using IE at least once,
1795 there is no point to use dynamic model for it. */
1796 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7
AO
1797 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1798 || tls_type != GOT_TLS_IE))
bffbf940 1799 {
67a4f2b7 1800 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
bffbf940 1801 tls_type = old_tls_type;
67a4f2b7
AO
1802 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1803 && GOT_TLS_GD_ANY_P (tls_type))
1804 tls_type |= old_tls_type;
bffbf940
JJ
1805 else
1806 {
09a24cbf 1807 if (h)
4c544807
L
1808 name = h->root.root.string;
1809 else
1810 name = bfd_elf_sym_name (abfd, symtab_hdr,
1811 isym, NULL);
bffbf940 1812 (*_bfd_error_handler)
1f7a4e42 1813 (_("%B: '%s' accessed both as normal and thread local symbol"),
4c544807 1814 abfd, name);
68c4a57e 1815 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1816 return FALSE;
bffbf940
JJ
1817 }
1818 }
1819
1820 if (old_tls_type != tls_type)
1821 {
1822 if (h != NULL)
351f65ca 1823 elf_x86_64_hash_entry (h)->tls_type = tls_type;
bffbf940 1824 else
351f65ca 1825 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
bffbf940
JJ
1826 }
1827 }
c434dee6
AJ
1828 /* Fall through */
1829
d6ab8113
JB
1830 case R_X86_64_GOTOFF64:
1831 case R_X86_64_GOTPC32:
7b81dfbb 1832 case R_X86_64_GOTPC64:
bffbf940 1833 create_got:
6de2ae4a 1834 if (htab->elf.sgot == NULL)
c434dee6
AJ
1835 {
1836 if (htab->elf.dynobj == NULL)
1837 htab->elf.dynobj = abfd;
6de2ae4a
L
1838 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1839 info))
c2e61a4e 1840 return FALSE;
c434dee6 1841 }
70256ad8
AJ
1842 break;
1843
1844 case R_X86_64_PLT32:
c3320543 1845 case R_X86_64_PLT32_BND:
70256ad8 1846 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ
1847 actually build the entry in adjust_dynamic_symbol,
1848 because this might be a case of linking PIC code which is
1849 never referenced by a dynamic object, in which case we
1850 don't need to generate a procedure linkage table entry
1851 after all. */
70256ad8
AJ
1852
1853 /* If this is a local symbol, we resolve it directly without
407443a3 1854 creating a procedure linkage table entry. */
70256ad8
AJ
1855 if (h == NULL)
1856 continue;
1857
f5385ebf 1858 h->needs_plt = 1;
51b64d56 1859 h->plt.refcount += 1;
70256ad8
AJ
1860 break;
1861
7b81dfbb
AJ
1862 case R_X86_64_PLTOFF64:
1863 /* This tries to form the 'address' of a function relative
1864 to GOT. For global symbols we need a PLT entry. */
1865 if (h != NULL)
1866 {
1867 h->needs_plt = 1;
1868 h->plt.refcount += 1;
1869 }
1870 goto create_got;
1871
6a3e1bae
L
1872 case R_X86_64_SIZE32:
1873 case R_X86_64_SIZE64:
06a6a421 1874 size_reloc = TRUE;
6a3e1bae
L
1875 goto do_size;
1876
248775ba
L
1877 case R_X86_64_32:
1878 if (!ABI_64_P (abfd))
1879 goto pointer;
cc78d0af
AJ
1880 case R_X86_64_8:
1881 case R_X86_64_16:
70256ad8 1882 case R_X86_64_32S:
1b71fb54
AJ
1883 /* Let's help debug shared library creation. These relocs
1884 cannot be used in shared libs. Don't error out for
1885 sections we don't care about, such as debug sections or
1886 non-constant sections. */
1887 if (info->shared
1888 && (sec->flags & SEC_ALLOC) != 0
1889 && (sec->flags & SEC_READONLY) != 0)
1890 {
09a24cbf 1891 if (h)
4c544807
L
1892 name = h->root.root.string;
1893 else
1894 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1b71fb54 1895 (*_bfd_error_handler)
d003868e 1896 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
4c544807 1897 abfd, x86_64_elf_howto_table[r_type].name, name);
1b71fb54 1898 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1899 return FALSE;
1b71fb54
AJ
1900 }
1901 /* Fall through. */
1902
c434dee6
AJ
1903 case R_X86_64_PC8:
1904 case R_X86_64_PC16:
70256ad8 1905 case R_X86_64_PC32:
c3320543 1906 case R_X86_64_PC32_BND:
d6ab8113 1907 case R_X86_64_PC64:
1b71fb54 1908 case R_X86_64_64:
248775ba 1909pointer:
710ab287 1910 if (h != NULL && info->executable)
c434dee6
AJ
1911 {
1912 /* If this reloc is in a read-only section, we might
1913 need a copy reloc. We can't check reliably at this
1914 stage whether the section is read-only, as input
1915 sections have not yet been mapped to output sections.
1916 Tentatively set the flag for now, and correct in
1917 adjust_dynamic_symbol. */
f5385ebf 1918 h->non_got_ref = 1;
c434dee6
AJ
1919
1920 /* We may need a .plt entry if the function this reloc
1921 refers to is in a shared lib. */
1922 h->plt.refcount += 1;
c3320543
L
1923 if (r_type != R_X86_64_PC32
1924 && r_type != R_X86_64_PC32_BND
1925 && r_type != R_X86_64_PC64)
f5385ebf 1926 h->pointer_equality_needed = 1;
c434dee6 1927 }
70256ad8 1928
06a6a421 1929 size_reloc = FALSE;
6a3e1bae 1930do_size:
70256ad8
AJ
1931 /* If we are creating a shared library, and this is a reloc
1932 against a global symbol, or a non PC relative reloc
1933 against a local symbol, then we need to copy the reloc
1934 into the shared library. However, if we are linking with
1935 -Bsymbolic, we do not need to copy a reloc against a
1936 global symbol which is defined in an object we are
407443a3 1937 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ
1938 this point we have not seen all the input files, so it is
1939 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ
1940 later (it is never cleared). In case of a weak definition,
1941 DEF_REGULAR may be cleared later by a strong definition in
1942 a shared library. We account for that possibility below by
1943 storing information in the relocs_copied field of the hash
1944 table entry. A similar situation occurs when creating
1945 shared libraries and symbol visibility changes render the
1946 symbol local.
1947
1948 If on the other hand, we are creating an executable, we
1949 may need to keep relocations for symbols satisfied by a
1950 dynamic library if we manage to avoid copy relocs for the
0f88be7a 1951 symbol. */
c434dee6
AJ
1952 if ((info->shared
1953 && (sec->flags & SEC_ALLOC) != 0
d8045f23 1954 && (! IS_X86_64_PCREL_TYPE (r_type)
c434dee6 1955 || (h != NULL
55255dae 1956 && (! SYMBOLIC_BIND (info, h)
c434dee6 1957 || h->root.type == bfd_link_hash_defweak
f5385ebf 1958 || !h->def_regular))))
d40d037c
AJ
1959 || (ELIMINATE_COPY_RELOCS
1960 && !info->shared
c434dee6
AJ
1961 && (sec->flags & SEC_ALLOC) != 0
1962 && h != NULL
1963 && (h->root.type == bfd_link_hash_defweak
0f88be7a 1964 || !h->def_regular)))
70256ad8 1965 {
e03a8ed8
L
1966 struct elf_dyn_relocs *p;
1967 struct elf_dyn_relocs **head;
c434dee6
AJ
1968
1969 /* We must copy these reloc types into the output file.
1970 Create a reloc section in dynobj and make room for
1971 this reloc. */
70256ad8
AJ
1972 if (sreloc == NULL)
1973 {
c434dee6
AJ
1974 if (htab->elf.dynobj == NULL)
1975 htab->elf.dynobj = abfd;
1976
83bac4b0 1977 sreloc = _bfd_elf_make_dynamic_reloc_section
82e96e07
L
1978 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
1979 abfd, /*rela?*/ TRUE);
70256ad8 1980
70256ad8 1981 if (sreloc == NULL)
c2e61a4e 1982 return FALSE;
70256ad8
AJ
1983 }
1984
c434dee6
AJ
1985 /* If this is a global symbol, we count the number of
1986 relocations we need for this symbol. */
1987 if (h != NULL)
70256ad8 1988 {
351f65ca 1989 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
c434dee6
AJ
1990 }
1991 else
1992 {
1993 /* Track dynamic relocs needed for local syms too.
1994 We really need local syms available to do this
1995 easily. Oh well. */
c434dee6 1996 asection *s;
87d72d41 1997 void **vpp;
87d72d41
AM
1998
1999 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2000 abfd, r_symndx);
2001 if (isym == NULL)
2002 return FALSE;
2003
2004 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
c434dee6 2005 if (s == NULL)
87d72d41 2006 s = sec;
70256ad8 2007
e81d3500
DD
2008 /* Beware of type punned pointers vs strict aliasing
2009 rules. */
2010 vpp = &(elf_section_data (s)->local_dynrel);
e03a8ed8 2011 head = (struct elf_dyn_relocs **)vpp;
c434dee6 2012 }
70256ad8 2013
c434dee6
AJ
2014 p = *head;
2015 if (p == NULL || p->sec != sec)
2016 {
2017 bfd_size_type amt = sizeof *p;
d8045f23 2018
e03a8ed8 2019 p = ((struct elf_dyn_relocs *)
c434dee6 2020 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 2021 if (p == NULL)
c2e61a4e 2022 return FALSE;
c434dee6
AJ
2023 p->next = *head;
2024 *head = p;
2025 p->sec = sec;
2026 p->count = 0;
2027 p->pc_count = 0;
70256ad8 2028 }
c434dee6
AJ
2029
2030 p->count += 1;
06a6a421
L
2031 /* Count size relocation as PC-relative relocation. */
2032 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
c434dee6 2033 p->pc_count += 1;
70256ad8
AJ
2034 }
2035 break;
fe4770f4
AJ
2036
2037 /* This relocation describes the C++ object vtable hierarchy.
2038 Reconstruct it for later use during GC. */
2039 case R_X86_64_GNU_VTINHERIT:
c152c796 2040 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 2041 return FALSE;
fe4770f4
AJ
2042 break;
2043
2044 /* This relocation describes which C++ vtable entries are actually
2045 used. Record for later use during GC. */
2046 case R_X86_64_GNU_VTENTRY:
d17e0c6e
JB
2047 BFD_ASSERT (h != NULL);
2048 if (h != NULL
2049 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
c2e61a4e 2050 return FALSE;
fe4770f4 2051 break;
c434dee6
AJ
2052
2053 default:
2054 break;
70256ad8
AJ
2055 }
2056 }
2057
b34976b6 2058 return TRUE;
70256ad8
AJ
2059}
2060
2061/* Return the section that should be marked against GC for a given
407443a3 2062 relocation. */
70256ad8
AJ
2063
2064static asection *
351f65ca
L
2065elf_x86_64_gc_mark_hook (asection *sec,
2066 struct bfd_link_info *info,
2067 Elf_Internal_Rela *rel,
2068 struct elf_link_hash_entry *h,
2069 Elf_Internal_Sym *sym)
70256ad8
AJ
2070{
2071 if (h != NULL)
351f65ca 2072 switch (ELF32_R_TYPE (rel->r_info))
07adf181
AM
2073 {
2074 case R_X86_64_GNU_VTINHERIT:
2075 case R_X86_64_GNU_VTENTRY:
2076 return NULL;
2077 }
2078
2079 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
70256ad8
AJ
2080}
2081
407443a3 2082/* Update the got entry reference counts for the section being removed. */
70256ad8 2083
b34976b6 2084static bfd_boolean
351f65ca
L
2085elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
2086 asection *sec,
2087 const Elf_Internal_Rela *relocs)
70256ad8 2088{
351f65ca 2089 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ
2090 Elf_Internal_Shdr *symtab_hdr;
2091 struct elf_link_hash_entry **sym_hashes;
2092 bfd_signed_vma *local_got_refcounts;
2093 const Elf_Internal_Rela *rel, *relend;
c434dee6 2094
7dda2462
TG
2095 if (info->relocatable)
2096 return TRUE;
2097
351f65ca 2098 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
2099 if (htab == NULL)
2100 return FALSE;
2101
c434dee6 2102 elf_section_data (sec)->local_dynrel = NULL;
70256ad8 2103
0ffa91dd 2104 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8
AJ
2105 sym_hashes = elf_sym_hashes (abfd);
2106 local_got_refcounts = elf_local_got_refcounts (abfd);
2107
351f65ca 2108 htab = elf_x86_64_hash_table (info);
70256ad8
AJ
2109 relend = relocs + sec->reloc_count;
2110 for (rel = relocs; rel < relend; rel++)
26e41594
AM
2111 {
2112 unsigned long r_symndx;
2113 unsigned int r_type;
2114 struct elf_link_hash_entry *h = NULL;
70256ad8 2115
351f65ca 2116 r_symndx = htab->r_sym (rel->r_info);
26e41594
AM
2117 if (r_symndx >= symtab_hdr->sh_info)
2118 {
26e41594 2119 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM
2120 while (h->root.type == bfd_link_hash_indirect
2121 || h->root.type == bfd_link_hash_warning)
2122 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 2123 }
bb1cb422
L
2124 else
2125 {
2126 /* A local symbol. */
2127 Elf_Internal_Sym *isym;
2128
2129 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2130 abfd, r_symndx);
2131
2132 /* Check relocation against local STT_GNU_IFUNC symbol. */
2133 if (isym != NULL
82e96e07 2134 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
bb1cb422 2135 {
351f65ca 2136 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
bb1cb422
L
2137 if (h == NULL)
2138 abort ();
2139 }
2140 }
c434dee6 2141
3db2e7dd
L
2142 if (h)
2143 {
2144 struct elf_x86_64_link_hash_entry *eh;
2145 struct elf_dyn_relocs **pp;
2146 struct elf_dyn_relocs *p;
2147
2148 eh = (struct elf_x86_64_link_hash_entry *) h;
2149
2150 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2151 if (p->sec == sec)
2152 {
2153 /* Everything must go for SEC. */
2154 *pp = p->next;
2155 break;
2156 }
2157 }
2158
351f65ca
L
2159 r_type = ELF32_R_TYPE (rel->r_info);
2160 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
2161 symtab_hdr, sym_hashes,
2162 &r_type, GOT_UNKNOWN,
2163 rel, relend, h, r_symndx))
142411ca
L
2164 return FALSE;
2165
26e41594
AM
2166 switch (r_type)
2167 {
2168 case R_X86_64_TLSLD:
4dfe6ac6
NC
2169 if (htab->tls_ld_got.refcount > 0)
2170 htab->tls_ld_got.refcount -= 1;
26e41594 2171 break;
c434dee6 2172
26e41594 2173 case R_X86_64_TLSGD:
67a4f2b7
AO
2174 case R_X86_64_GOTPC32_TLSDESC:
2175 case R_X86_64_TLSDESC_CALL:
26e41594
AM
2176 case R_X86_64_GOTTPOFF:
2177 case R_X86_64_GOT32:
2178 case R_X86_64_GOTPCREL:
7b81dfbb
AJ
2179 case R_X86_64_GOT64:
2180 case R_X86_64_GOTPCREL64:
2181 case R_X86_64_GOTPLT64:
26e41594
AM
2182 if (h != NULL)
2183 {
7b81dfbb 2184 if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0)
eed180f8 2185 h->plt.refcount -= 1;
26e41594
AM
2186 if (h->got.refcount > 0)
2187 h->got.refcount -= 1;
bb1cb422
L
2188 if (h->type == STT_GNU_IFUNC)
2189 {
2190 if (h->plt.refcount > 0)
2191 h->plt.refcount -= 1;
2192 }
26e41594
AM
2193 }
2194 else if (local_got_refcounts != NULL)
2195 {
2196 if (local_got_refcounts[r_symndx] > 0)
2197 local_got_refcounts[r_symndx] -= 1;
2198 }
2199 break;
c434dee6 2200
26e41594
AM
2201 case R_X86_64_8:
2202 case R_X86_64_16:
2203 case R_X86_64_32:
2204 case R_X86_64_64:
2205 case R_X86_64_32S:
2206 case R_X86_64_PC8:
2207 case R_X86_64_PC16:
2208 case R_X86_64_PC32:
c3320543 2209 case R_X86_64_PC32_BND:
d6ab8113 2210 case R_X86_64_PC64:
1788fc08
L
2211 case R_X86_64_SIZE32:
2212 case R_X86_64_SIZE64:
3db2e7dd
L
2213 if (info->shared
2214 && (h == NULL || h->type != STT_GNU_IFUNC))
26e41594
AM
2215 break;
2216 /* Fall thru */
c434dee6 2217
26e41594 2218 case R_X86_64_PLT32:
c3320543 2219 case R_X86_64_PLT32_BND:
7b81dfbb 2220 case R_X86_64_PLTOFF64:
26e41594
AM
2221 if (h != NULL)
2222 {
2223 if (h->plt.refcount > 0)
2224 h->plt.refcount -= 1;
2225 }
2226 break;
70256ad8 2227
26e41594
AM
2228 default:
2229 break;
2230 }
2231 }
70256ad8 2232
b34976b6 2233 return TRUE;
70256ad8
AJ
2234}
2235
2236/* Adjust a symbol defined by a dynamic object and referenced by a
2237 regular object. The current definition is in some section of the
2238 dynamic object, but we're not including those sections. We have to
2239 change the definition to something the rest of the link can
407443a3 2240 understand. */
70256ad8 2241
b34976b6 2242static bfd_boolean
351f65ca
L
2243elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2244 struct elf_link_hash_entry *h)
70256ad8 2245{
351f65ca 2246 struct elf_x86_64_link_hash_table *htab;
70256ad8 2247 asection *s;
5ca5bb35
L
2248 struct elf_x86_64_link_hash_entry *eh;
2249 struct elf_dyn_relocs *p;
70256ad8 2250
cbe950e9
L
2251 /* STT_GNU_IFUNC symbol must go through PLT. */
2252 if (h->type == STT_GNU_IFUNC)
2253 {
73bcf233
L
2254 /* All local STT_GNU_IFUNC references must be treate as local
2255 calls via local PLT. */
5ca5bb35
L
2256 if (h->ref_regular
2257 && SYMBOL_CALLS_LOCAL (info, h))
2258 {
73bcf233 2259 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L
2260 struct elf_dyn_relocs **pp;
2261
2262 eh = (struct elf_x86_64_link_hash_entry *) h;
2263 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2264 {
2265 pc_count += p->pc_count;
2266 p->count -= p->pc_count;
2267 p->pc_count = 0;
73bcf233 2268 count += p->count;
5ca5bb35
L
2269 if (p->count == 0)
2270 *pp = p->next;
2271 else
2272 pp = &p->next;
2273 }
2274
73bcf233 2275 if (pc_count || count)
5ca5bb35
L
2276 {
2277 h->needs_plt = 1;
5ca5bb35 2278 h->non_got_ref = 1;
a5479e5f
L
2279 if (h->plt.refcount <= 0)
2280 h->plt.refcount = 1;
2281 else
2282 h->plt.refcount += 1;
5ca5bb35
L
2283 }
2284 }
2285
cbe950e9
L
2286 if (h->plt.refcount <= 0)
2287 {
2288 h->plt.offset = (bfd_vma) -1;
2289 h->needs_plt = 0;
2290 }
2291 return TRUE;
2292 }
2293
70256ad8
AJ
2294 /* If this is a function, put it in the procedure linkage table. We
2295 will fill in the contents of the procedure linkage table later,
2296 when we know the address of the .got section. */
2297 if (h->type == STT_FUNC
f5385ebf 2298 || h->needs_plt)
70256ad8 2299 {
c434dee6 2300 if (h->plt.refcount <= 0
27482721
AJ
2301 || SYMBOL_CALLS_LOCAL (info, h)
2302 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2303 && h->root.type == bfd_link_hash_undefweak))
70256ad8 2304 {
70256ad8
AJ
2305 /* This case can occur if we saw a PLT32 reloc in an input
2306 file, but the symbol was never referred to by a dynamic
2307 object, or if all references were garbage collected. In
2308 such a case, we don't actually need to build a procedure
2309 linkage table, and we can just do a PC32 reloc instead. */
70256ad8 2310 h->plt.offset = (bfd_vma) -1;
f5385ebf 2311 h->needs_plt = 0;
70256ad8
AJ
2312 }
2313
b34976b6 2314 return TRUE;
70256ad8 2315 }
bbd7ec4a 2316 else
c434dee6
AJ
2317 /* It's possible that we incorrectly decided a .plt reloc was
2318 needed for an R_X86_64_PC32 reloc to a non-function sym in
2319 check_relocs. We can't decide accurately between function and
2320 non-function syms in check-relocs; Objects loaded later in
2321 the link may change h->type. So fix it now. */
bbd7ec4a 2322 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ
2323
2324 /* If this is a weak symbol, and there is a real definition, the
2325 processor independent code will have arranged for us to see the
407443a3 2326 real definition first, and we can just use the same value. */
f6e332e6 2327 if (h->u.weakdef != NULL)
70256ad8 2328 {
f6e332e6
AM
2329 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2330 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2331 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2332 h->root.u.def.value = h->u.weakdef->root.u.def.value;
d40d037c 2333 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 2334 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 2335 return TRUE;
70256ad8
AJ
2336 }
2337
2338 /* This is a reference to a symbol defined by a dynamic object which
407443a3 2339 is not a function. */
70256ad8
AJ
2340
2341 /* If we are creating a shared library, we must presume that the
2342 only references to the symbol are via the global offset table.
2343 For such cases we need not do anything here; the relocations will
407443a3 2344 be handled correctly by relocate_section. */
70256ad8 2345 if (info->shared)
b34976b6 2346 return TRUE;
70256ad8
AJ
2347
2348 /* If there are no references to this symbol that do not use the
2349 GOT, we don't need to generate a copy reloc. */
f5385ebf 2350 if (!h->non_got_ref)
b34976b6 2351 return TRUE;
70256ad8 2352
c434dee6
AJ
2353 /* If -z nocopyreloc was given, we won't generate them either. */
2354 if (info->nocopyreloc)
2355 {
f5385ebf 2356 h->non_got_ref = 0;
b34976b6 2357 return TRUE;
c434dee6
AJ
2358 }
2359
d40d037c 2360 if (ELIMINATE_COPY_RELOCS)
c434dee6 2361 {
351f65ca 2362 eh = (struct elf_x86_64_link_hash_entry *) h;
d40d037c
AJ
2363 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2364 {
2365 s = p->sec->output_section;
2366 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2367 break;
2368 }
2369
2370 /* If we didn't find any dynamic relocs in read-only sections, then
2371 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2372 if (p == NULL)
2373 {
f5385ebf 2374 h->non_got_ref = 0;
d40d037c
AJ
2375 return TRUE;
2376 }
c434dee6
AJ
2377 }
2378
70256ad8 2379 /* We must allocate the symbol in our .dynbss section, which will
407443a3 2380 become part of the .bss section of the executable. There will be
70256ad8
AJ
2381 an entry for this symbol in the .dynsym section. The dynamic
2382 object will contain position independent code, so all references
2383 from the dynamic object to this symbol will go through the global
2384 offset table. The dynamic linker will use the .dynsym entry to
2385 determine the address it must put in the global offset table, so
2386 both the dynamic object and the regular object will refer to the
2387 same memory location for the variable. */
2388
351f65ca 2389 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
2390 if (htab == NULL)
2391 return FALSE;
70256ad8
AJ
2392
2393 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2394 to copy the initial value out of the dynamic object and into the
cedb70c5 2395 runtime process image. */
1d7e9d18 2396 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
70256ad8 2397 {
351f65ca
L
2398 const struct elf_backend_data *bed;
2399 bed = get_elf_backend_data (info->output_bfd);
2400 htab->srelbss->size += bed->s->sizeof_rela;
f5385ebf 2401 h->needs_copy = 1;
70256ad8
AJ
2402 }
2403
c434dee6 2404 s = htab->sdynbss;
70256ad8 2405
027297b7 2406 return _bfd_elf_adjust_dynamic_copy (h, s);
70256ad8
AJ
2407}
2408
c434dee6
AJ
2409/* Allocate space in .plt, .got and associated reloc sections for
2410 dynamic relocs. */
2411
b34976b6 2412static bfd_boolean
351f65ca 2413elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ
2414{
2415 struct bfd_link_info *info;
351f65ca
L
2416 struct elf_x86_64_link_hash_table *htab;
2417 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2418 struct elf_dyn_relocs *p;
351f65ca 2419 const struct elf_backend_data *bed;
eed180f8 2420 unsigned int plt_entry_size;
c434dee6 2421
e92d460e 2422 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2423 return TRUE;
c434dee6 2424
351f65ca 2425 eh = (struct elf_x86_64_link_hash_entry *) h;
e92d460e 2426
c434dee6 2427 info = (struct bfd_link_info *) inf;
351f65ca 2428 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
2429 if (htab == NULL)
2430 return FALSE;
351f65ca 2431 bed = get_elf_backend_data (info->output_bfd);
eed180f8 2432 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
c434dee6 2433
cbe950e9
L
2434 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2435 here if it is defined and referenced in a non-shared object. */
2436 if (h->type == STT_GNU_IFUNC
2437 && h->def_regular)
0ff2b86e
L
2438 {
2439 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2440 &eh->dyn_relocs,
2441 plt_entry_size,
2442 plt_entry_size,
2443 GOT_ENTRY_SIZE))
2444 {
2445 asection *s = htab->plt_bnd;
2446 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2447 {
2448 /* Use the .plt.bnd section if it is created. */
2449 eh->plt_bnd.offset = s->size;
2450
2451 /* Make room for this entry in the .plt.bnd section. */
2452 s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2453 }
2454
2455 return TRUE;
2456 }
2457 else
2458 return FALSE;
2459 }
cbe950e9
L
2460 else if (htab->elf.dynamic_sections_created
2461 && h->plt.refcount > 0)
c434dee6
AJ
2462 {
2463 /* Make sure this symbol is output as a dynamic symbol.
2464 Undefined weak syms won't yet be marked as dynamic. */
2465 if (h->dynindx == -1
f5385ebf 2466 && !h->forced_local)
c434dee6 2467 {
c152c796 2468 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2469 return FALSE;
c434dee6
AJ
2470 }
2471
27482721
AJ
2472 if (info->shared
2473 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6 2474 {
6de2ae4a 2475 asection *s = htab->elf.splt;
0ff2b86e 2476 asection *bnd_s = htab->plt_bnd;
c434dee6
AJ
2477
2478 /* If this is the first .plt entry, make room for the special
2479 first entry. */
eea6121a 2480 if (s->size == 0)
bb81b736 2481 s->size = plt_entry_size;
c434dee6 2482
eea6121a 2483 h->plt.offset = s->size;
0ff2b86e
L
2484 if (bnd_s)
2485 eh->plt_bnd.offset = bnd_s->size;
c434dee6
AJ
2486
2487 /* If this symbol is not defined in a regular file, and we are
2488 not generating a shared library, then set the symbol to this
2489 location in the .plt. This is required to make function
2490 pointers compare as equal between the normal executable and
2491 the shared library. */
2492 if (! info->shared
f5385ebf 2493 && !h->def_regular)
c434dee6 2494 {
0ff2b86e
L
2495 if (bnd_s)
2496 {
2497 /* We need to make a call to the entry of the second
2498 PLT instead of regular PLT entry. */
2499 h->root.u.def.section = bnd_s;
2500 h->root.u.def.value = eh->plt_bnd.offset;
2501 }
2502 else
2503 {
2504 h->root.u.def.section = s;
2505 h->root.u.def.value = h->plt.offset;
2506 }
c434dee6
AJ
2507 }
2508
2509 /* Make room for this entry. */
eed180f8 2510 s->size += plt_entry_size;
0ff2b86e
L
2511 if (bnd_s)
2512 {
2513 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry)
2514 == sizeof (elf_x86_64_legacy_plt2_entry));
2515 bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2516 }
c434dee6
AJ
2517
2518 /* We also need to make an entry in the .got.plt section, which
2519 will be placed in the .got section by the linker script. */
6de2ae4a 2520 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
c434dee6
AJ
2521
2522 /* We also need to make an entry in the .rela.plt section. */
351f65ca 2523 htab->elf.srelplt->size += bed->s->sizeof_rela;
6de2ae4a 2524 htab->elf.srelplt->reloc_count++;
c434dee6
AJ
2525 }
2526 else
2527 {
2528 h->plt.offset = (bfd_vma) -1;
f5385ebf 2529 h->needs_plt = 0;
c434dee6
AJ
2530 }
2531 }
2532 else
2533 {
2534 h->plt.offset = (bfd_vma) -1;
f5385ebf 2535 h->needs_plt = 0;
c434dee6
AJ
2536 }
2537
67a4f2b7
AO
2538 eh->tlsdesc_got = (bfd_vma) -1;
2539
bffbf940
JJ
2540 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2541 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2542 if (h->got.refcount > 0
1d85728f 2543 && info->executable
bffbf940 2544 && h->dynindx == -1
351f65ca 2545 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
d8045f23
NC
2546 {
2547 h->got.offset = (bfd_vma) -1;
2548 }
bffbf940 2549 else if (h->got.refcount > 0)
c434dee6
AJ
2550 {
2551 asection *s;
b34976b6 2552 bfd_boolean dyn;
351f65ca 2553 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ
2554
2555 /* Make sure this symbol is output as a dynamic symbol.
2556 Undefined weak syms won't yet be marked as dynamic. */
2557 if (h->dynindx == -1
f5385ebf 2558 && !h->forced_local)
c434dee6 2559 {
c152c796 2560 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2561 return FALSE;
c434dee6
AJ
2562 }
2563
67a4f2b7
AO
2564 if (GOT_TLS_GDESC_P (tls_type))
2565 {
6de2ae4a 2566 eh->tlsdesc_got = htab->elf.sgotplt->size
351f65ca 2567 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2568 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO
2569 h->got.offset = (bfd_vma) -2;
2570 }
2571 if (! GOT_TLS_GDESC_P (tls_type)
2572 || GOT_TLS_GD_P (tls_type))
2573 {
6de2ae4a 2574 s = htab->elf.sgot;
67a4f2b7
AO
2575 h->got.offset = s->size;
2576 s->size += GOT_ENTRY_SIZE;
2577 if (GOT_TLS_GD_P (tls_type))
2578 s->size += GOT_ENTRY_SIZE;
2579 }
c434dee6 2580 dyn = htab->elf.dynamic_sections_created;
bffbf940
JJ
2581 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2582 and two if global.
2583 R_X86_64_GOTTPOFF needs one dynamic relocation. */
67a4f2b7 2584 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
bffbf940 2585 || tls_type == GOT_TLS_IE)
351f65ca 2586 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7 2587 else if (GOT_TLS_GD_P (tls_type))
351f65ca 2588 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
67a4f2b7
AO
2589 else if (! GOT_TLS_GDESC_P (tls_type)
2590 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2591 || h->root.type != bfd_link_hash_undefweak)
27482721
AJ
2592 && (info->shared
2593 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
351f65ca 2594 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7
AO
2595 if (GOT_TLS_GDESC_P (tls_type))
2596 {
351f65ca 2597 htab->elf.srelplt->size += bed->s->sizeof_rela;
67a4f2b7
AO
2598 htab->tlsdesc_plt = (bfd_vma) -1;
2599 }
c434dee6
AJ
2600 }
2601 else
2602 h->got.offset = (bfd_vma) -1;
2603
c434dee6 2604 if (eh->dyn_relocs == NULL)
b34976b6 2605 return TRUE;
c434dee6
AJ
2606
2607 /* In the shared -Bsymbolic case, discard space allocated for
2608 dynamic pc-relative relocs against symbols which turn out to be
2609 defined in regular objects. For the normal shared case, discard
2610 space for pc-relative relocs that have become local due to symbol
2611 visibility changes. */
2612
2613 if (info->shared)
2614 {
27482721
AJ
2615 /* Relocs that use pc_count are those that appear on a call
2616 insn, or certain REL relocs that can generated via assembly.
2617 We want calls to protected symbols to resolve directly to the
2618 function rather than going via the plt. If people want
2619 function pointer comparisons to work as expected then they
2620 should avoid writing weird assembly. */
2621 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6 2622 {
e03a8ed8 2623 struct elf_dyn_relocs **pp;
c434dee6
AJ
2624
2625 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2626 {
c3ce498c
L
2627 p->count -= p->pc_count;
2628 p->pc_count = 0;
c434dee6
AJ
2629 if (p->count == 0)
2630 *pp = p->next;
2631 else
2632 pp = &p->next;
2633 }
2634 }
4e795f50
AM
2635
2636 /* Also discard relocs on undefined weak syms with non-default
c353e543 2637 visibility. */
22d606e9 2638 if (eh->dyn_relocs != NULL
c353e543 2639 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM
2640 {
2641 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2642 eh->dyn_relocs = NULL;
2643
2644 /* Make sure undefined weak symbols are output as a dynamic
2645 symbol in PIEs. */
2646 else if (h->dynindx == -1
d8045f23
NC
2647 && ! h->forced_local
2648 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2649 return FALSE;
22d606e9 2650 }
cbe950e9 2651
d8045f23 2652 }
d40d037c 2653 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ
2654 {
2655 /* For the non-shared case, discard space for relocs against
2656 symbols which turn out to need copy relocs or are not
2657 dynamic. */
2658
f5385ebf
AM
2659 if (!h->non_got_ref
2660 && ((h->def_dynamic
2661 && !h->def_regular)
c434dee6
AJ
2662 || (htab->elf.dynamic_sections_created
2663 && (h->root.type == bfd_link_hash_undefweak
2664 || h->root.type == bfd_link_hash_undefined))))
2665 {
2666 /* Make sure this symbol is output as a dynamic symbol.
2667 Undefined weak syms won't yet be marked as dynamic. */
2668 if (h->dynindx == -1
d8045f23
NC
2669 && ! h->forced_local
2670 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2671 return FALSE;
c434dee6
AJ
2672
2673 /* If that succeeded, we know we'll be keeping all the
2674 relocs. */
2675 if (h->dynindx != -1)
2676 goto keep;
2677 }
2678
2679 eh->dyn_relocs = NULL;
2680
2681 keep: ;
2682 }
2683
2684 /* Finally, allocate space. */
2685 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2686 {
e7c33416
NC
2687 asection * sreloc;
2688
cbe950e9 2689 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC
2690
2691 BFD_ASSERT (sreloc != NULL);
2692
351f65ca 2693 sreloc->size += p->count * bed->s->sizeof_rela;
c434dee6
AJ
2694 }
2695
b34976b6 2696 return TRUE;
c434dee6
AJ
2697}
2698
c25bc9fc
L
2699/* Allocate space in .plt, .got and associated reloc sections for
2700 local dynamic relocs. */
2701
2702static bfd_boolean
351f65ca 2703elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
c25bc9fc
L
2704{
2705 struct elf_link_hash_entry *h
2706 = (struct elf_link_hash_entry *) *slot;
2707
2708 if (h->type != STT_GNU_IFUNC
2709 || !h->def_regular
2710 || !h->ref_regular
2711 || !h->forced_local
2712 || h->root.type != bfd_link_hash_defined)
2713 abort ();
2714
351f65ca 2715 return elf_x86_64_allocate_dynrelocs (h, inf);
c25bc9fc
L
2716}
2717
c434dee6
AJ
2718/* Find any dynamic relocs that apply to read-only sections. */
2719
b34976b6 2720static bfd_boolean
351f65ca
L
2721elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2722 void * inf)
c434dee6 2723{
351f65ca 2724 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2725 struct elf_dyn_relocs *p;
c434dee6 2726
aa715242
L
2727 /* Skip local IFUNC symbols. */
2728 if (h->forced_local && h->type == STT_GNU_IFUNC)
2729 return TRUE;
2730
351f65ca 2731 eh = (struct elf_x86_64_link_hash_entry *) h;
c434dee6
AJ
2732 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2733 {
2734 asection *s = p->sec->output_section;
2735
2736 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2737 {
2738 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2739
2740 info->flags |= DF_TEXTREL;
2741
b70321a2
L
2742 if (info->warn_shared_textrel && info->shared)
2743 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2744 p->sec->owner, h->root.root.string,
2745 p->sec);
2746
c434dee6 2747 /* Not an error, just cut short the traversal. */
b34976b6 2748 return FALSE;
c434dee6
AJ
2749 }
2750 }
b34976b6 2751 return TRUE;
c434dee6
AJ
2752}
2753
daa67607
L
2754/* Convert
2755 mov foo@GOTPCREL(%rip), %reg
2756 to
2757 lea foo(%rip), %reg
2758 with the local symbol, foo. */
2759
2760static bfd_boolean
2761elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec,
2762 struct bfd_link_info *link_info)
2763{
2764 Elf_Internal_Shdr *symtab_hdr;
2765 Elf_Internal_Rela *internal_relocs;
2766 Elf_Internal_Rela *irel, *irelend;
2767 bfd_byte *contents;
2768 struct elf_x86_64_link_hash_table *htab;
2769 bfd_boolean changed_contents;
2770 bfd_boolean changed_relocs;
2771 bfd_signed_vma *local_got_refcounts;
2772
2773 /* Don't even try to convert non-ELF outputs. */
2774 if (!is_elf_hash_table (link_info->hash))
2775 return FALSE;
2776
fbdc86d9 2777 /* Nothing to do if there are no codes, no relocations or no output. */
daa67607 2778 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
fbdc86d9
L
2779 || sec->reloc_count == 0
2780 || discarded_section (sec))
daa67607
L
2781 return TRUE;
2782
2783 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2784
2785 /* Load the relocations for this section. */
2786 internal_relocs = (_bfd_elf_link_read_relocs
2787 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2788 link_info->keep_memory));
2789 if (internal_relocs == NULL)
2790 return FALSE;
2791
2792 htab = elf_x86_64_hash_table (link_info);
2793 changed_contents = FALSE;
2794 changed_relocs = FALSE;
2795 local_got_refcounts = elf_local_got_refcounts (abfd);
2796
2797 /* Get the section contents. */
2798 if (elf_section_data (sec)->this_hdr.contents != NULL)
2799 contents = elf_section_data (sec)->this_hdr.contents;
2800 else
2801 {
2802 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2803 goto error_return;
2804 }
2805
2806 irelend = internal_relocs + sec->reloc_count;
2807 for (irel = internal_relocs; irel < irelend; irel++)
2808 {
2809 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2810 unsigned int r_symndx = htab->r_sym (irel->r_info);
2811 unsigned int indx;
2812 struct elf_link_hash_entry *h;
2813
2814 if (r_type != R_X86_64_GOTPCREL)
2815 continue;
2816
2817 /* Get the symbol referred to by the reloc. */
2818 if (r_symndx < symtab_hdr->sh_info)
2819 {
2820 Elf_Internal_Sym *isym;
2821
2822 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2823 abfd, r_symndx);
2824
2825 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2826 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2827 && bfd_get_8 (input_bfd,
2828 contents + irel->r_offset - 2) == 0x8b)
2829 {
2830 bfd_put_8 (output_bfd, 0x8d,
2831 contents + irel->r_offset - 2);
2832 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2833 if (local_got_refcounts != NULL
2834 && local_got_refcounts[r_symndx] > 0)
2835 local_got_refcounts[r_symndx] -= 1;
2836 changed_contents = TRUE;
2837 changed_relocs = TRUE;
2838 }
2839 continue;
2840 }
2841
2842 indx = r_symndx - symtab_hdr->sh_info;
2843 h = elf_sym_hashes (abfd)[indx];
2844 BFD_ASSERT (h != NULL);
2845
2846 while (h->root.type == bfd_link_hash_indirect
2847 || h->root.type == bfd_link_hash_warning)
2848 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2849
3f65f599
L
2850 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2851 avoid optimizing _DYNAMIC since ld.so may use its link-time
2852 address. */
daa67607
L
2853 if (h->def_regular
2854 && h->type != STT_GNU_IFUNC
9637f6ef 2855 && h != htab->elf.hdynamic
daa67607
L
2856 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2857 && bfd_get_8 (input_bfd,
2858 contents + irel->r_offset - 2) == 0x8b)
2859 {
2860 bfd_put_8 (output_bfd, 0x8d,
2861 contents + irel->r_offset - 2);
2862 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2863 if (h->got.refcount > 0)
2864 h->got.refcount -= 1;
2865 changed_contents = TRUE;
2866 changed_relocs = TRUE;
2867 }
2868 }
2869
2870 if (contents != NULL
2871 && elf_section_data (sec)->this_hdr.contents != contents)
2872 {
2873 if (!changed_contents && !link_info->keep_memory)
2874 free (contents);
2875 else
2876 {
2877 /* Cache the section contents for elf_link_input_bfd. */
2878 elf_section_data (sec)->this_hdr.contents = contents;
2879 }
2880 }
2881
2882 if (elf_section_data (sec)->relocs != internal_relocs)
2883 {
2884 if (!changed_relocs)
2885 free (internal_relocs);
2886 else
2887 elf_section_data (sec)->relocs = internal_relocs;
2888 }
2889
2890 return TRUE;
2891
2892 error_return:
2893 if (contents != NULL
2894 && elf_section_data (sec)->this_hdr.contents != contents)
2895 free (contents);
2896 if (internal_relocs != NULL
2897 && elf_section_data (sec)->relocs != internal_relocs)
2898 free (internal_relocs);
2899 return FALSE;
2900}
2901
70256ad8
AJ
2902/* Set the sizes of the dynamic sections. */
2903
b34976b6 2904static bfd_boolean
351f65ca
L
2905elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2906 struct bfd_link_info *info)
70256ad8 2907{
351f65ca 2908 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ
2909 bfd *dynobj;
2910 asection *s;
b34976b6 2911 bfd_boolean relocs;
c434dee6 2912 bfd *ibfd;
351f65ca 2913 const struct elf_backend_data *bed;
70256ad8 2914
351f65ca 2915 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
2916 if (htab == NULL)
2917 return FALSE;
351f65ca 2918 bed = get_elf_backend_data (output_bfd);
4dfe6ac6 2919
c434dee6
AJ
2920 dynobj = htab->elf.dynobj;
2921 if (dynobj == NULL)
2922 abort ();
70256ad8 2923
c434dee6 2924 if (htab->elf.dynamic_sections_created)
70256ad8
AJ
2925 {
2926 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 2927 if (info->executable)
70256ad8 2928 {
3d4d4302 2929 s = bfd_get_linker_section (dynobj, ".interp");
c434dee6
AJ
2930 if (s == NULL)
2931 abort ();
351f65ca
L
2932 s->size = htab->dynamic_interpreter_size;
2933 s->contents = (unsigned char *) htab->dynamic_interpreter;
70256ad8
AJ
2934 }
2935 }
70256ad8 2936
c434dee6
AJ
2937 /* Set up .got offsets for local syms, and space for local dynamic
2938 relocs. */
c72f2fb2 2939 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
70256ad8 2940 {
c434dee6
AJ
2941 bfd_signed_vma *local_got;
2942 bfd_signed_vma *end_local_got;
bffbf940 2943 char *local_tls_type;
67a4f2b7 2944 bfd_vma *local_tlsdesc_gotent;
c434dee6
AJ
2945 bfd_size_type locsymcount;
2946 Elf_Internal_Shdr *symtab_hdr;
2947 asection *srel;
70256ad8 2948
0ffa91dd 2949 if (! is_x86_64_elf (ibfd))
70256ad8
AJ
2950 continue;
2951
c434dee6 2952 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 2953 {
e03a8ed8 2954 struct elf_dyn_relocs *p;
c434dee6 2955
daa67607
L
2956 if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info))
2957 return FALSE;
2958
e03a8ed8 2959 for (p = (struct elf_dyn_relocs *)
e81d3500 2960 (elf_section_data (s)->local_dynrel);
c434dee6
AJ
2961 p != NULL;
2962 p = p->next)
70256ad8 2963 {
c434dee6
AJ
2964 if (!bfd_is_abs_section (p->sec)
2965 && bfd_is_abs_section (p->sec->output_section))
2966 {
2967 /* Input section has been discarded, either because
2968 it is a copy of a linkonce section or due to
2969 linker script /DISCARD/, so we'll be discarding
2970 the relocs too. */
2971 }
2972 else if (p->count != 0)
2973 {
2974 srel = elf_section_data (p->sec)->sreloc;
351f65ca 2975 srel->size += p->count * bed->s->sizeof_rela;
4b819e1f
L
2976 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2977 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L
2978 {
2979 info->flags |= DF_TEXTREL;
2980 if (info->warn_shared_textrel && info->shared)
2981 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2982 p->sec->owner, p->sec);
b70321a2 2983 }
c434dee6 2984 }
70256ad8
AJ
2985 }
2986 }
c434dee6
AJ
2987
2988 local_got = elf_local_got_refcounts (ibfd);
2989 if (!local_got)
2990 continue;
2991
0ffa91dd 2992 symtab_hdr = &elf_symtab_hdr (ibfd);
c434dee6
AJ
2993 locsymcount = symtab_hdr->sh_info;
2994 end_local_got = local_got + locsymcount;
351f65ca
L
2995 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
2996 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
6de2ae4a
L
2997 s = htab->elf.sgot;
2998 srel = htab->elf.srelgot;
67a4f2b7
AO
2999 for (; local_got < end_local_got;
3000 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
70256ad8 3001 {
67a4f2b7 3002 *local_tlsdesc_gotent = (bfd_vma) -1;
c434dee6 3003 if (*local_got > 0)
70256ad8 3004 {
67a4f2b7
AO
3005 if (GOT_TLS_GDESC_P (*local_tls_type))
3006 {
6de2ae4a 3007 *local_tlsdesc_gotent = htab->elf.sgotplt->size
351f65ca 3008 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 3009 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO
3010 *local_got = (bfd_vma) -2;
3011 }
3012 if (! GOT_TLS_GDESC_P (*local_tls_type)
3013 || GOT_TLS_GD_P (*local_tls_type))
3014 {
3015 *local_got = s->size;
3016 s->size += GOT_ENTRY_SIZE;
3017 if (GOT_TLS_GD_P (*local_tls_type))
3018 s->size += GOT_ENTRY_SIZE;
3019 }
bffbf940 3020 if (info->shared
67a4f2b7 3021 || GOT_TLS_GD_ANY_P (*local_tls_type)
bffbf940 3022 || *local_tls_type == GOT_TLS_IE)
67a4f2b7
AO
3023 {
3024 if (GOT_TLS_GDESC_P (*local_tls_type))
3025 {
6de2ae4a 3026 htab->elf.srelplt->size
351f65ca 3027 += bed->s->sizeof_rela;
67a4f2b7
AO
3028 htab->tlsdesc_plt = (bfd_vma) -1;
3029 }
3030 if (! GOT_TLS_GDESC_P (*local_tls_type)
3031 || GOT_TLS_GD_P (*local_tls_type))
351f65ca 3032 srel->size += bed->s->sizeof_rela;
67a4f2b7 3033 }
70256ad8
AJ
3034 }
3035 else
c434dee6
AJ
3036 *local_got = (bfd_vma) -1;
3037 }
3038 }
70256ad8 3039
bffbf940
JJ
3040 if (htab->tls_ld_got.refcount > 0)
3041 {
3042 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3043 relocs. */
6de2ae4a
L
3044 htab->tls_ld_got.offset = htab->elf.sgot->size;
3045 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
351f65ca 3046 htab->elf.srelgot->size += bed->s->sizeof_rela;
bffbf940
JJ
3047 }
3048 else
3049 htab->tls_ld_got.offset = -1;
3050
c434dee6
AJ
3051 /* Allocate global sym .plt and .got entries, and space for global
3052 sym dynamic relocs. */
351f65ca 3053 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
eb4ff4d6 3054 info);
c434dee6 3055
c25bc9fc
L
3056 /* Allocate .plt and .got entries, and space for local symbols. */
3057 htab_traverse (htab->loc_hash_table,
351f65ca 3058 elf_x86_64_allocate_local_dynrelocs,
c25bc9fc
L
3059 info);
3060
67a4f2b7
AO
3061 /* For every jump slot reserved in the sgotplt, reloc_count is
3062 incremented. However, when we reserve space for TLS descriptors,
3063 it's not incremented, so in order to compute the space reserved
3064 for them, it suffices to multiply the reloc count by the jump
e1f98742
L
3065 slot size.
3066
3067 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3068 so that R_X86_64_IRELATIVE entries come last. */
6de2ae4a 3069 if (htab->elf.srelplt)
e1f98742
L
3070 {
3071 htab->sgotplt_jump_table_size
3072 = elf_x86_64_compute_jump_table_size (htab);
3073 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3074 }
3075 else if (htab->elf.irelplt)
3076 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
67a4f2b7
AO
3077
3078 if (htab->tlsdesc_plt)
3079 {
3080 /* If we're not using lazy TLS relocations, don't generate the
3081 PLT and GOT entries they require. */
3082 if ((info->flags & DF_BIND_NOW))
3083 htab->tlsdesc_plt = 0;
3084 else
3085 {
6de2ae4a
L
3086 htab->tlsdesc_got = htab->elf.sgot->size;
3087 htab->elf.sgot->size += GOT_ENTRY_SIZE;
67a4f2b7
AO
3088 /* Reserve room for the initial entry.
3089 FIXME: we could probably do away with it in this case. */
6de2ae4a 3090 if (htab->elf.splt->size == 0)
eed180f8 3091 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
6de2ae4a 3092 htab->tlsdesc_plt = htab->elf.splt->size;
eed180f8 3093 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
67a4f2b7
AO
3094 }
3095 }
3096
a7b16ceb
L
3097 if (htab->elf.sgotplt)
3098 {
3099 /* Don't allocate .got.plt section if there are no GOT nor PLT
eed180f8 3100 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L
3101 if ((htab->elf.hgot == NULL
3102 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L
3103 && (htab->elf.sgotplt->size
3104 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L
3105 && (htab->elf.splt == NULL
3106 || htab->elf.splt->size == 0)
3107 && (htab->elf.sgot == NULL
3108 || htab->elf.sgot->size == 0)
3109 && (htab->elf.iplt == NULL
3110 || htab->elf.iplt->size == 0)
3111 && (htab->elf.igotplt == NULL
3112 || htab->elf.igotplt->size == 0))
3113 htab->elf.sgotplt->size = 0;
3114 }
3115
9a2a56cc
AM
3116 if (htab->plt_eh_frame != NULL
3117 && htab->elf.splt != NULL
3118 && htab->elf.splt->size != 0
3119 && !bfd_is_abs_section (htab->elf.splt->output_section)
3120 && _bfd_elf_eh_frame_present (info))
3121 {
3122 const struct elf_x86_64_backend_data *arch_data
f8222080 3123 = get_elf_x86_64_arch_data (bed);
9a2a56cc
AM
3124 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
3125 }
3126
c434dee6
AJ
3127 /* We now have determined the sizes of the various dynamic sections.
3128 Allocate memory for them. */
b34976b6 3129 relocs = FALSE;
c434dee6
AJ
3130 for (s = dynobj->sections; s != NULL; s = s->next)
3131 {
3132 if ((s->flags & SEC_LINKER_CREATED) == 0)
3133 continue;
3134
6de2ae4a
L
3135 if (s == htab->elf.splt
3136 || s == htab->elf.sgot
3137 || s == htab->elf.sgotplt
3138 || s == htab->elf.iplt
3139 || s == htab->elf.igotplt
0ff2b86e 3140 || s == htab->plt_bnd
9a2a56cc 3141 || s == htab->plt_eh_frame
75ff4589 3142 || s == htab->sdynbss)
c434dee6
AJ
3143 {
3144 /* Strip this section if we don't need it; see the
3145 comment below. */
3146 }
0112cd26 3147 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
c434dee6 3148 {
6de2ae4a 3149 if (s->size != 0 && s != htab->elf.srelplt)
b34976b6 3150 relocs = TRUE;
c434dee6
AJ
3151
3152 /* We use the reloc_count field as a counter if we need
3153 to copy relocs into the output file. */
6de2ae4a 3154 if (s != htab->elf.srelplt)
67a4f2b7 3155 s->reloc_count = 0;
70256ad8 3156 }
c434dee6 3157 else
70256ad8
AJ
3158 {
3159 /* It's not one of our sections, so don't allocate space. */
3160 continue;
3161 }
3162
eea6121a 3163 if (s->size == 0)
70256ad8 3164 {
c434dee6
AJ
3165 /* If we don't need this section, strip it from the
3166 output file. This is mostly to handle .rela.bss and
3167 .rela.plt. We must create both sections in
3168 create_dynamic_sections, because they must be created
3169 before the linker maps input sections to output
3170 sections. The linker does that before
3171 adjust_dynamic_symbol is called, and it is that
3172 function which decides whether anything needs to go
3173 into these sections. */
3174
8423293d 3175 s->flags |= SEC_EXCLUDE;
70256ad8
AJ
3176 continue;
3177 }
3178
c456f082
AM
3179 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3180 continue;
3181
70256ad8
AJ
3182 /* Allocate memory for the section contents. We use bfd_zalloc
3183 here in case unused entries are not reclaimed before the
3184 section's contents are written out. This should not happen,
3185 but this way if it does, we get a R_X86_64_NONE reloc instead
3186 of garbage. */
eea6121a 3187 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
c434dee6 3188 if (s->contents == NULL)
b34976b6 3189 return FALSE;
70256ad8
AJ
3190 }
3191
e41b3a13 3192 if (htab->plt_eh_frame != NULL
9a2a56cc
AM
3193 && htab->plt_eh_frame->contents != NULL)
3194 {
3195 const struct elf_x86_64_backend_data *arch_data
f8222080 3196 = get_elf_x86_64_arch_data (bed);
9a2a56cc
AM
3197
3198 memcpy (htab->plt_eh_frame->contents,
3199 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3200 bfd_put_32 (dynobj, htab->elf.splt->size,
3201 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3202 }
e41b3a13 3203
c434dee6 3204 if (htab->elf.dynamic_sections_created)
70256ad8
AJ
3205 {
3206 /* Add some entries to the .dynamic section. We fill in the
351f65ca 3207 values later, in elf_x86_64_finish_dynamic_sections, but we
70256ad8 3208 must add the entries now so that we get the correct size for
407443a3 3209 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 3210 dynamic linker and used by the debugger. */
dc810e39 3211#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3212 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3213
36af4a4e 3214 if (info->executable)
70256ad8 3215 {
dc810e39 3216 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3217 return FALSE;
70256ad8
AJ
3218 }
3219
6de2ae4a 3220 if (htab->elf.splt->size != 0)
70256ad8 3221 {
dc810e39
AM
3222 if (!add_dynamic_entry (DT_PLTGOT, 0)
3223 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3224 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3225 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 3226 return FALSE;
67a4f2b7
AO
3227
3228 if (htab->tlsdesc_plt
3229 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3230 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3231 return FALSE;
70256ad8
AJ
3232 }
3233
3234 if (relocs)
3235 {
dc810e39
AM
3236 if (!add_dynamic_entry (DT_RELA, 0)
3237 || !add_dynamic_entry (DT_RELASZ, 0)
351f65ca 3238 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
b34976b6 3239 return FALSE;
70256ad8 3240
c434dee6
AJ
3241 /* If any dynamic relocs apply to a read-only section,
3242 then we need a DT_TEXTREL entry. */
3243 if ((info->flags & DF_TEXTREL) == 0)
eed180f8 3244 elf_link_hash_traverse (&htab->elf,
351f65ca 3245 elf_x86_64_readonly_dynrelocs,
eb4ff4d6 3246 info);
c434dee6
AJ
3247
3248 if ((info->flags & DF_TEXTREL) != 0)
3249 {
3250 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3251 return FALSE;
c434dee6 3252 }
70256ad8
AJ
3253 }
3254 }
dc810e39 3255#undef add_dynamic_entry
70256ad8 3256
b34976b6 3257 return TRUE;
70256ad8
AJ
3258}
3259
67a4f2b7 3260static bfd_boolean
351f65ca
L
3261elf_x86_64_always_size_sections (bfd *output_bfd,
3262 struct bfd_link_info *info)
67a4f2b7
AO
3263{
3264 asection *tls_sec = elf_hash_table (info)->tls_sec;
3265
3266 if (tls_sec)
3267 {
3268 struct elf_link_hash_entry *tlsbase;
3269
3270 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3271 "_TLS_MODULE_BASE_",
3272 FALSE, FALSE, FALSE);
3273
3274 if (tlsbase && tlsbase->type == STT_TLS)
3275 {
351f65ca 3276 struct elf_x86_64_link_hash_table *htab;
67a4f2b7
AO
3277 struct bfd_link_hash_entry *bh = NULL;
3278 const struct elf_backend_data *bed
3279 = get_elf_backend_data (output_bfd);
3280
351f65ca 3281 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
3282 if (htab == NULL)
3283 return FALSE;
3284
67a4f2b7
AO
3285 if (!(_bfd_generic_link_add_one_symbol
3286 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3287 tls_sec, 0, NULL, FALSE,
3288 bed->collect, &bh)))
3289 return FALSE;
9f03412a 3290
4dfe6ac6 3291 htab->tls_module_base = bh;
9f03412a 3292
67a4f2b7
AO
3293 tlsbase = (struct elf_link_hash_entry *)bh;
3294 tlsbase->def_regular = 1;
3295 tlsbase->other = STV_HIDDEN;
3296 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3297 }
3298 }
3299
3300 return TRUE;
3301}
3302
9f03412a
AO
3303/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3304 executables. Rather than setting it to the beginning of the TLS
3305 section, we have to set it to the end. This function may be called
3306 multiple times, it is idempotent. */
3307
3308static void
351f65ca 3309elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3310{
351f65ca 3311 struct elf_x86_64_link_hash_table *htab;
9f03412a
AO
3312 struct bfd_link_hash_entry *base;
3313
3314 if (!info->executable)
3315 return;
3316
351f65ca 3317 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
3318 if (htab == NULL)
3319 return;
9f03412a 3320
4dfe6ac6
NC
3321 base = htab->tls_module_base;
3322 if (base == NULL)
9f03412a
AO
3323 return;
3324
4dfe6ac6 3325 base->u.def.value = htab->elf.tls_size;
9f03412a
AO
3326}
3327
bffbf940
JJ
3328/* Return the base VMA address which should be subtracted from real addresses
3329 when resolving @dtpoff relocation.
3330 This is PT_TLS segment p_vaddr. */
3331
3332static bfd_vma
351f65ca 3333elf_x86_64_dtpoff_base (struct bfd_link_info *info)
bffbf940 3334{
e1918d23
AM
3335 /* If tls_sec is NULL, we should have signalled an error already. */
3336 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 3337 return 0;
e1918d23 3338 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ
3339}
3340
3341/* Return the relocation value for @tpoff relocation
3342 if STT_TLS virtual address is ADDRESS. */
3343
3344static bfd_vma
351f65ca 3345elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 3346{
e1918d23 3347 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO
3348 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3349 bfd_vma static_tls_size;
bffbf940
JJ
3350
3351 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 3352 if (htab->tls_sec == NULL)
bffbf940 3353 return 0;
7dc98aea
RO
3354
3355 /* Consider special static TLS alignment requirements. */
3356 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3357 return address - static_tls_size - htab->tls_sec->vma;
bffbf940
JJ
3358}
3359
90f487df
L
3360/* Is the instruction before OFFSET in CONTENTS a 32bit relative
3361 branch? */
3362
3363static bfd_boolean
3364is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3365{
3366 /* Opcode Instruction
3367 0xe8 call
3368 0xe9 jump
3369 0x0f 0x8x conditional jump */
3370 return ((offset > 0
3371 && (contents [offset - 1] == 0xe8
3372 || contents [offset - 1] == 0xe9))
3373 || (offset > 1
3374 && contents [offset - 2] == 0x0f
3375 && (contents [offset - 1] & 0xf0) == 0x80));
3376}
3377
8d88c4ca
NC
3378/* Relocate an x86_64 ELF section. */
3379
b34976b6 3380static bfd_boolean
351f65ca
L
3381elf_x86_64_relocate_section (bfd *output_bfd,
3382 struct bfd_link_info *info,
3383 bfd *input_bfd,
3384 asection *input_section,
3385 bfd_byte *contents,
3386 Elf_Internal_Rela *relocs,
3387 Elf_Internal_Sym *local_syms,
3388 asection **local_sections)
8d88c4ca 3389{
351f65ca 3390 struct elf_x86_64_link_hash_table *htab;
8d88c4ca
NC
3391 Elf_Internal_Shdr *symtab_hdr;
3392 struct elf_link_hash_entry **sym_hashes;
3393 bfd_vma *local_got_offsets;
67a4f2b7 3394 bfd_vma *local_tlsdesc_gotents;
c434dee6 3395 Elf_Internal_Rela *rel;
8d88c4ca 3396 Elf_Internal_Rela *relend;
eed180f8 3397 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
8d88c4ca 3398
0ffa91dd
NC
3399 BFD_ASSERT (is_x86_64_elf (input_bfd));
3400
351f65ca 3401 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
3402 if (htab == NULL)
3403 return FALSE;
0ffa91dd 3404 symtab_hdr = &elf_symtab_hdr (input_bfd);
8d88c4ca
NC
3405 sym_hashes = elf_sym_hashes (input_bfd);
3406 local_got_offsets = elf_local_got_offsets (input_bfd);
351f65ca 3407 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
8d88c4ca 3408
351f65ca 3409 elf_x86_64_set_tls_module_base (info);
9f03412a 3410
c434dee6 3411 rel = relocs;
8d88c4ca 3412 relend = relocs + input_section->reloc_count;
c434dee6 3413 for (; rel < relend; rel++)
8d88c4ca 3414 {
bffbf940 3415 unsigned int r_type;
8d88c4ca
NC
3416 reloc_howto_type *howto;
3417 unsigned long r_symndx;
3418 struct elf_link_hash_entry *h;
0ff2b86e 3419 struct elf_x86_64_link_hash_entry *eh;
8d88c4ca
NC
3420 Elf_Internal_Sym *sym;
3421 asection *sec;
0ff2b86e 3422 bfd_vma off, offplt, plt_offset;
8d88c4ca 3423 bfd_vma relocation;
b34976b6 3424 bfd_boolean unresolved_reloc;
8d88c4ca 3425 bfd_reloc_status_type r;
bffbf940 3426 int tls_type;
0ff2b86e 3427 asection *base_got, *resolved_plt;
1788fc08 3428 bfd_vma st_size;
8d88c4ca 3429
351f65ca 3430 r_type = ELF32_R_TYPE (rel->r_info);
fe4770f4
AJ
3431 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3432 || r_type == (int) R_X86_64_GNU_VTENTRY)
3433 continue;
8d88c4ca 3434
9911c0fc 3435 if (r_type >= (int) R_X86_64_standard)
8da6118f 3436 {
9911c0fc
L
3437 (*_bfd_error_handler)
3438 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3439 input_bfd, input_section, r_type);
8da6118f 3440 bfd_set_error (bfd_error_bad_value);
b34976b6 3441 return FALSE;
8da6118f 3442 }
8d88c4ca 3443
d7921315 3444 if (r_type != (int) R_X86_64_32
eed180f8 3445 || ABI_64_P (output_bfd))
d7921315
L
3446 howto = x86_64_elf_howto_table + r_type;
3447 else
3448 howto = (x86_64_elf_howto_table
3449 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
351f65ca 3450 r_symndx = htab->r_sym (rel->r_info);
8d88c4ca
NC
3451 h = NULL;
3452 sym = NULL;
3453 sec = NULL;
b34976b6 3454 unresolved_reloc = FALSE;
8d88c4ca 3455 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH
3456 {
3457 sym = local_syms + r_symndx;
3458 sec = local_sections[r_symndx];
c434dee6 3459
c25bc9fc
L
3460 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3461 &sec, rel);
1788fc08 3462 st_size = sym->st_size;
c25bc9fc
L
3463
3464 /* Relocate against local STT_GNU_IFUNC symbol. */
1f85278f 3465 if (!info->relocatable
351f65ca 3466 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc 3467 {
351f65ca
L
3468 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3469 rel, FALSE);
c25bc9fc
L
3470 if (h == NULL)
3471 abort ();
3472
eed180f8 3473 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L
3474 h->root.u.def.value = sym->st_value;
3475 h->root.u.def.section = sec;
3476 }
8da6118f 3477 }
8d88c4ca 3478 else
8da6118f 3479 {
c9736ba0 3480 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 3481 bfd_boolean ignored ATTRIBUTE_UNUSED;
c434dee6 3482
b2a8e766
AM
3483 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3484 r_symndx, symtab_hdr, sym_hashes,
3485 h, sec, relocation,
62d887d4 3486 unresolved_reloc, warned, ignored);
1788fc08 3487 st_size = h->size;
8da6118f 3488 }
ab96bf03 3489
dbaa2011 3490 if (sec != NULL && discarded_section (sec))
0672748a 3491 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 3492 rel, 1, relend, howto, 0, contents);
ab96bf03
AM
3493
3494 if (info->relocatable)
3495 continue;
3496
1788fc08 3497 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
64d25c44 3498 {
1788fc08
L
3499 if (r_type == R_X86_64_64)
3500 {
3501 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3502 zero-extend it to 64bit if addend is zero. */
3503 r_type = R_X86_64_32;
3504 memset (contents + rel->r_offset + 4, 0, 4);
3505 }
3506 else if (r_type == R_X86_64_SIZE64)
3507 {
3508 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3509 zero-extend it to 64bit if addend is zero. */
3510 r_type = R_X86_64_SIZE32;
3511 memset (contents + rel->r_offset + 4, 0, 4);
3512 }
64d25c44
L
3513 }
3514
0ff2b86e
L
3515 eh = (struct elf_x86_64_link_hash_entry *) h;
3516
cbe950e9
L
3517 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3518 it here if it is defined in a non-shared object. */
3519 if (h != NULL
3520 && h->type == STT_GNU_IFUNC
3521 && h->def_regular)
3522 {
cbe950e9 3523 bfd_vma plt_index;
4c544807 3524 const char *name;
cbe950e9
L
3525
3526 if ((input_section->flags & SEC_ALLOC) == 0
3527 || h->plt.offset == (bfd_vma) -1)
3528 abort ();
3529
3530 /* STT_GNU_IFUNC symbol must go through PLT. */
0ff2b86e
L
3531 if (htab->elf.splt != NULL)
3532 {
3533 if (htab->plt_bnd != NULL)
3534 {
3535 resolved_plt = htab->plt_bnd;
3536 plt_offset = eh->plt_bnd.offset;
3537 }
3538 else
3539 {
3540 resolved_plt = htab->elf.splt;
3541 plt_offset = h->plt.offset;
3542 }
3543 }
3544 else
3545 {
3546 resolved_plt = htab->elf.iplt;
3547 plt_offset = h->plt.offset;
3548 }
3549
3550 relocation = (resolved_plt->output_section->vma
3551 + resolved_plt->output_offset + plt_offset);
cbe950e9
L
3552
3553 switch (r_type)
3554 {
3555 default:
4c544807
L
3556 if (h->root.root.string)
3557 name = h->root.root.string;
3558 else
3559 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3560 NULL);
cbe950e9
L
3561 (*_bfd_error_handler)
3562 (_("%B: relocation %s against STT_GNU_IFUNC "
3563 "symbol `%s' isn't handled by %s"), input_bfd,
3564 x86_64_elf_howto_table[r_type].name,
4c544807 3565 name, __FUNCTION__);
cbe950e9
L
3566 bfd_set_error (bfd_error_bad_value);
3567 return FALSE;
3568
3569 case R_X86_64_32S:
710ab287 3570 if (info->shared)
cbe950e9 3571 abort ();
710ab287
L
3572 goto do_relocation;
3573
248775ba
L
3574 case R_X86_64_32:
3575 if (ABI_64_P (output_bfd))
3576 goto do_relocation;
17672001 3577 /* FALLTHROUGH */
eed180f8 3578 case R_X86_64_64:
710ab287
L
3579 if (rel->r_addend != 0)
3580 {
4c544807
L
3581 if (h->root.root.string)
3582 name = h->root.root.string;
3583 else
3584 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3585 sym, NULL);
710ab287
L
3586 (*_bfd_error_handler)
3587 (_("%B: relocation %s against STT_GNU_IFUNC "
3588 "symbol `%s' has non-zero addend: %d"),
3589 input_bfd, x86_64_elf_howto_table[r_type].name,
4c544807 3590 name, rel->r_addend);
710ab287
L
3591 bfd_set_error (bfd_error_bad_value);
3592 return FALSE;
3593 }
3594
3595 /* Generate dynamic relcoation only when there is a
c293fa49 3596 non-GOT reference in a shared object. */
710ab287
L
3597 if (info->shared && h->non_got_ref)
3598 {
3599 Elf_Internal_Rela outrel;
710ab287
L
3600 asection *sreloc;
3601
c25bc9fc
L
3602 /* Need a dynamic relocation to get the real function
3603 address. */
710ab287
L
3604 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3605 info,
3606 input_section,
3607 rel->r_offset);
3608 if (outrel.r_offset == (bfd_vma) -1
3609 || outrel.r_offset == (bfd_vma) -2)
3610 abort ();
3611
3612 outrel.r_offset += (input_section->output_section->vma
3613 + input_section->output_offset);
3614
3615 if (h->dynindx == -1
44c4ea11
L
3616 || h->forced_local
3617 || info->executable)
710ab287
L
3618 {
3619 /* This symbol is resolved locally. */
56b8aada
L
3620 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3621 outrel.r_addend = (h->root.u.def.value
3622 + h->root.u.def.section->output_section->vma
3623 + h->root.u.def.section->output_offset);
710ab287
L
3624 }
3625 else
3626 {
351f65ca 3627 outrel.r_info = htab->r_info (h->dynindx, r_type);
710ab287
L
3628 outrel.r_addend = 0;
3629 }
3630
6de2ae4a 3631 sreloc = htab->elf.irelifunc;
351f65ca 3632 elf_append_rela (output_bfd, sreloc, &outrel);
710ab287
L
3633
3634 /* If this reloc is against an external symbol, we
3635 do not want to fiddle with the addend. Otherwise,
3636 we need to include the symbol value so that it
3637 becomes an addend for the dynamic reloc. For an
3638 internal symbol, we have updated addend. */
56b8aada 3639 continue;
710ab287 3640 }
17672001 3641 /* FALLTHROUGH */
cbe950e9 3642 case R_X86_64_PC32:
c3320543 3643 case R_X86_64_PC32_BND:
cbe950e9
L
3644 case R_X86_64_PC64:
3645 case R_X86_64_PLT32:
c3320543 3646 case R_X86_64_PLT32_BND:
cbe950e9
L
3647 goto do_relocation;
3648
3649 case R_X86_64_GOTPCREL:
3650 case R_X86_64_GOTPCREL64:
6de2ae4a 3651 base_got = htab->elf.sgot;
cbe950e9
L
3652 off = h->got.offset;
3653
7afd84dc 3654 if (base_got == NULL)
cbe950e9
L
3655 abort ();
3656
7afd84dc 3657 if (off == (bfd_vma) -1)
cbe950e9 3658 {
7afd84dc
L
3659 /* We can't use h->got.offset here to save state, or
3660 even just remember the offset, as finish_dynamic_symbol
3661 would use that as offset into .got. */
cbe950e9 3662
6de2ae4a 3663 if (htab->elf.splt != NULL)
7afd84dc 3664 {
eed180f8 3665 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 3666 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3667 base_got = htab->elf.sgotplt;
7afd84dc 3668 }
cbe950e9
L
3669 else
3670 {
eed180f8 3671 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3672 off = plt_index * GOT_ENTRY_SIZE;
6de2ae4a 3673 base_got = htab->elf.igotplt;
7afd84dc
L
3674 }
3675
3676 if (h->dynindx == -1
3677 || h->forced_local
3678 || info->symbolic)
3679 {
eed180f8 3680 /* This references the local defitionion. We must
7afd84dc 3681 initialize this entry in the global offset table.
eed180f8 3682 Since the offset must always be a multiple of 8,
7afd84dc
L
3683 we use the least significant bit to record
3684 whether we have initialized it already.
3685
3686 When doing a dynamic link, we create a .rela.got
3687 relocation entry to initialize the value. This
3688 is done in the finish_dynamic_symbol routine. */
3689 if ((off & 1) != 0)
3690 off &= ~1;
3691 else
3692 {
3693 bfd_put_64 (output_bfd, relocation,
3694 base_got->contents + off);
3695 /* Note that this is harmless for the GOTPLT64
3696 case, as -1 | 1 still is -1. */
3697 h->got.offset |= 1;
3698 }
cbe950e9
L
3699 }
3700 }
3701
3702 relocation = (base_got->output_section->vma
3703 + base_got->output_offset + off);
3704
cbe950e9
L
3705 goto do_relocation;
3706 }
3707 }
3708
70256ad8
AJ
3709 /* When generating a shared object, the relocations handled here are
3710 copied into the output file to be resolved at run time. */
3711 switch (r_type)
3712 {
3713 case R_X86_64_GOT32:
7b81dfbb 3714 case R_X86_64_GOT64:
70256ad8
AJ
3715 /* Relocation is to the entry for this symbol in the global
3716 offset table. */
70256ad8 3717 case R_X86_64_GOTPCREL:
7b81dfbb
AJ
3718 case R_X86_64_GOTPCREL64:
3719 /* Use global offset table entry as symbol value. */
3720 case R_X86_64_GOTPLT64:
3721 /* This is the same as GOT64 for relocation purposes, but
3722 indicates the existence of a PLT entry. The difficulty is,
3723 that we must calculate the GOT slot offset from the PLT
3724 offset, if this symbol got a PLT entry (it was global).
3725 Additionally if it's computed from the PLT entry, then that
3726 GOT offset is relative to .got.plt, not to .got. */
6de2ae4a 3727 base_got = htab->elf.sgot;
7b81dfbb 3728
6de2ae4a 3729 if (htab->elf.sgot == NULL)
c434dee6 3730 abort ();
053579d7 3731
51e0a107 3732 if (h != NULL)
70256ad8 3733 {
b34976b6 3734 bfd_boolean dyn;
c434dee6
AJ
3735
3736 off = h->got.offset;
7b81dfbb 3737 if (h->needs_plt
eed180f8 3738 && h->plt.offset != (bfd_vma)-1
7b81dfbb
AJ
3739 && off == (bfd_vma)-1)
3740 {
3741 /* We can't use h->got.offset here to save
3742 state, or even just remember the offset, as
3743 finish_dynamic_symbol would use that as offset into
3744 .got. */
eed180f8 3745 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
7b81dfbb 3746 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3747 base_got = htab->elf.sgotplt;
7b81dfbb
AJ
3748 }
3749
c434dee6 3750 dyn = htab->elf.dynamic_sections_created;
51e0a107 3751
27482721 3752 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
51e0a107 3753 || (info->shared
27482721 3754 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ
3755 || (ELF_ST_VISIBILITY (h->other)
3756 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH
3757 {
3758 /* This is actually a static link, or it is a -Bsymbolic
3759 link and the symbol is defined locally, or the symbol
407443a3 3760 was forced to be local because of a version file. We
51e0a107
JH
3761 must initialize this entry in the global offset table.
3762 Since the offset must always be a multiple of 8, we
3763 use the least significant bit to record whether we
3764 have initialized it already.
3765
3766 When doing a dynamic link, we create a .rela.got
407443a3
AJ
3767 relocation entry to initialize the value. This is
3768 done in the finish_dynamic_symbol routine. */
51e0a107
JH
3769 if ((off & 1) != 0)
3770 off &= ~1;
3771 else
3772 {
3773 bfd_put_64 (output_bfd, relocation,
7b81dfbb
AJ
3774 base_got->contents + off);
3775 /* Note that this is harmless for the GOTPLT64 case,
eed180f8 3776 as -1 | 1 still is -1. */
51e0a107
JH
3777 h->got.offset |= 1;
3778 }
3779 }
053579d7 3780 else
b34976b6 3781 unresolved_reloc = FALSE;
70256ad8 3782 }
51e0a107
JH
3783 else
3784 {
c434dee6
AJ
3785 if (local_got_offsets == NULL)
3786 abort ();
51e0a107
JH
3787
3788 off = local_got_offsets[r_symndx];
3789
3790 /* The offset must always be a multiple of 8. We use
407443a3
AJ
3791 the least significant bit to record whether we have
3792 already generated the necessary reloc. */
51e0a107
JH
3793 if ((off & 1) != 0)
3794 off &= ~1;
3795 else
3796 {
c434dee6 3797 bfd_put_64 (output_bfd, relocation,
7b81dfbb 3798 base_got->contents + off);
51e0a107
JH
3799
3800 if (info->shared)
3801 {
947216bf 3802 asection *s;
51e0a107 3803 Elf_Internal_Rela outrel;
70256ad8 3804
51e0a107
JH
3805 /* We need to generate a R_X86_64_RELATIVE reloc
3806 for the dynamic linker. */
6de2ae4a 3807 s = htab->elf.srelgot;
947216bf 3808 if (s == NULL)
c434dee6 3809 abort ();
51e0a107 3810
7b81dfbb
AJ
3811 outrel.r_offset = (base_got->output_section->vma
3812 + base_got->output_offset
51e0a107 3813 + off);
351f65ca 3814 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
51e0a107 3815 outrel.r_addend = relocation;
351f65ca 3816 elf_append_rela (output_bfd, s, &outrel);
51e0a107
JH
3817 }
3818
3819 local_got_offsets[r_symndx] |= 1;
3820 }
51e0a107 3821 }
6a2bda3f 3822
c434dee6
AJ
3823 if (off >= (bfd_vma) -2)
3824 abort ();
3825
7b81dfbb
AJ
3826 relocation = base_got->output_section->vma
3827 + base_got->output_offset + off;
3828 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
6de2ae4a
L
3829 relocation -= htab->elf.sgotplt->output_section->vma
3830 - htab->elf.sgotplt->output_offset;
c434dee6 3831
70256ad8
AJ
3832 break;
3833
d6ab8113
JB
3834 case R_X86_64_GOTOFF64:
3835 /* Relocation is relative to the start of the global offset
3836 table. */
3837
3838 /* Check to make sure it isn't a protected function symbol
3839 for shared library since it may not be local when used
3840 as function address. */
bdb892b9 3841 if (!info->executable
d6ab8113 3842 && h
bdb892b9 3843 && !SYMBOLIC_BIND (info, h)
d6ab8113
JB
3844 && h->def_regular
3845 && h->type == STT_FUNC
3846 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3847 {
3848 (*_bfd_error_handler)
3849 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3850 input_bfd, h->root.root.string);
3851 bfd_set_error (bfd_error_bad_value);
3852 return FALSE;
3853 }
3854
3855 /* Note that sgot is not involved in this
3856 calculation. We always want the start of .got.plt. If we
3857 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3858 permitted by the ABI, we might have to change this
3859 calculation. */
6de2ae4a
L
3860 relocation -= htab->elf.sgotplt->output_section->vma
3861 + htab->elf.sgotplt->output_offset;
d6ab8113
JB
3862 break;
3863
3864 case R_X86_64_GOTPC32:
7b81dfbb 3865 case R_X86_64_GOTPC64:
d6ab8113 3866 /* Use global offset table as symbol value. */
6de2ae4a
L
3867 relocation = htab->elf.sgotplt->output_section->vma
3868 + htab->elf.sgotplt->output_offset;
d6ab8113
JB
3869 unresolved_reloc = FALSE;
3870 break;
7b81dfbb
AJ
3871
3872 case R_X86_64_PLTOFF64:
3873 /* Relocation is PLT entry relative to GOT. For local
3874 symbols it's the symbol itself relative to GOT. */
eed180f8 3875 if (h != NULL
7b81dfbb
AJ
3876 /* See PLT32 handling. */
3877 && h->plt.offset != (bfd_vma) -1
6de2ae4a 3878 && htab->elf.splt != NULL)
7b81dfbb 3879 {
0ff2b86e
L
3880 if (htab->plt_bnd != NULL)
3881 {
3882 resolved_plt = htab->plt_bnd;
3883 plt_offset = eh->plt_bnd.offset;
3884 }
3885 else
3886 {
3887 resolved_plt = htab->elf.splt;
3888 plt_offset = h->plt.offset;
3889 }
3890
3891 relocation = (resolved_plt->output_section->vma
3892 + resolved_plt->output_offset
3893 + plt_offset);
7b81dfbb
AJ
3894 unresolved_reloc = FALSE;
3895 }
3896
6de2ae4a
L
3897 relocation -= htab->elf.sgotplt->output_section->vma
3898 + htab->elf.sgotplt->output_offset;
7b81dfbb 3899 break;
d6ab8113 3900
70256ad8 3901 case R_X86_64_PLT32:
c3320543 3902 case R_X86_64_PLT32_BND:
70256ad8
AJ
3903 /* Relocation is to the entry for this symbol in the
3904 procedure linkage table. */
3905
3906 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 3907 without using the procedure linkage table. */
70256ad8
AJ
3908 if (h == NULL)
3909 break;
3910
c434dee6 3911 if (h->plt.offset == (bfd_vma) -1
6de2ae4a 3912 || htab->elf.splt == NULL)
70256ad8
AJ
3913 {
3914 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ
3915 happens when statically linking PIC code, or when
3916 using -Bsymbolic. */
70256ad8
AJ
3917 break;
3918 }
3919
0ff2b86e
L
3920 if (htab->plt_bnd != NULL)
3921 {
3922 resolved_plt = htab->plt_bnd;
3923 plt_offset = eh->plt_bnd.offset;
3924 }
3925 else
3926 {
3927 resolved_plt = htab->elf.splt;
3928 plt_offset = h->plt.offset;
3929 }
3930
3931 relocation = (resolved_plt->output_section->vma
3932 + resolved_plt->output_offset
3933 + plt_offset);
b34976b6 3934 unresolved_reloc = FALSE;
70256ad8
AJ
3935 break;
3936
1788fc08
L
3937 case R_X86_64_SIZE32:
3938 case R_X86_64_SIZE64:
1788fc08
L
3939 /* Set to symbol size. */
3940 relocation = st_size;
3941 goto direct;
3942
fd8ab9e5
AJ
3943 case R_X86_64_PC8:
3944 case R_X86_64_PC16:
3945 case R_X86_64_PC32:
c3320543 3946 case R_X86_64_PC32_BND:
6610a52d 3947 if (info->shared
ba3bee0b 3948 && (input_section->flags & SEC_ALLOC) != 0
90f487df 3949 && (input_section->flags & SEC_READONLY) != 0
41bed6dd 3950 && h != NULL)
6610a52d 3951 {
41bed6dd
L
3952 bfd_boolean fail = FALSE;
3953 bfd_boolean branch
c3320543
L
3954 = ((r_type == R_X86_64_PC32
3955 || r_type == R_X86_64_PC32_BND)
41bed6dd
L
3956 && is_32bit_relative_branch (contents, rel->r_offset));
3957
3958 if (SYMBOL_REFERENCES_LOCAL (info, h))
3959 {
3960 /* Symbol is referenced locally. Make sure it is
3961 defined locally or for a branch. */
3962 fail = !h->def_regular && !branch;
3963 }
90f487df 3964 else
41bed6dd
L
3965 {
3966 /* Symbol isn't referenced locally. We only allow
3967 branch to symbol with non-default visibility. */
3968 fail = (!branch
3969 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3970 }
3971
3972 if (fail)
3973 {
3974 const char *fmt;
3975 const char *v;
3976 const char *pic = "";
3977
3978 switch (ELF_ST_VISIBILITY (h->other))
3979 {
3980 case STV_HIDDEN:
3981 v = _("hidden symbol");
3982 break;
3983 case STV_INTERNAL:
3984 v = _("internal symbol");
3985 break;
3986 case STV_PROTECTED:
3987 v = _("protected symbol");
3988 break;
3989 default:
3990 v = _("symbol");
3991 pic = _("; recompile with -fPIC");
3992 break;
3993 }
3994
3995 if (h->def_regular)
3996 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3997 else
3998 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3999
4000 (*_bfd_error_handler) (fmt, input_bfd,
4001 x86_64_elf_howto_table[r_type].name,
4002 v, h->root.root.string, pic);
4003 bfd_set_error (bfd_error_bad_value);
4004 return FALSE;
4005 }
6610a52d
L
4006 }
4007 /* Fall through. */
4008
70256ad8
AJ
4009 case R_X86_64_8:
4010 case R_X86_64_16:
4011 case R_X86_64_32:
d6ab8113 4012 case R_X86_64_PC64:
6b3db546 4013 case R_X86_64_64:
80643fbc 4014 /* FIXME: The ABI says the linker should make sure the value is
407443a3 4015 the same when it's zeroextended to 64 bit. */
c434dee6 4016
1788fc08 4017direct:
b1e24c02 4018 if ((input_section->flags & SEC_ALLOC) == 0)
c434dee6
AJ
4019 break;
4020
4021 if ((info->shared
4bc6e03a
AJ
4022 && (h == NULL
4023 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4024 || h->root.type != bfd_link_hash_undefweak)
1788fc08
L
4025 && ((! IS_X86_64_PCREL_TYPE (r_type)
4026 && r_type != R_X86_64_SIZE32
4027 && r_type != R_X86_64_SIZE64)
d8045f23 4028 || ! SYMBOL_CALLS_LOCAL (info, h)))
d40d037c
AJ
4029 || (ELIMINATE_COPY_RELOCS
4030 && !info->shared
c434dee6
AJ
4031 && h != NULL
4032 && h->dynindx != -1
f5385ebf
AM
4033 && !h->non_got_ref
4034 && ((h->def_dynamic
4035 && !h->def_regular)
c434dee6 4036 || h->root.type == bfd_link_hash_undefweak
0f88be7a 4037 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ
4038 {
4039 Elf_Internal_Rela outrel;
b34976b6 4040 bfd_boolean skip, relocate;
c434dee6 4041 asection *sreloc;
70256ad8
AJ
4042
4043 /* When generating a shared object, these relocations
4044 are copied into the output file to be resolved at run
407443a3 4045 time. */
b34976b6
AM
4046 skip = FALSE;
4047 relocate = FALSE;
70256ad8 4048
c629eae0
JJ
4049 outrel.r_offset =
4050 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 4051 rel->r_offset);
c629eae0 4052 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 4053 skip = TRUE;
0fb19cbc 4054 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 4055 skip = TRUE, relocate = TRUE;
70256ad8
AJ
4056
4057 outrel.r_offset += (input_section->output_section->vma
4058 + input_section->output_offset);
4059
4060 if (skip)
0bb2d96a 4061 memset (&outrel, 0, sizeof outrel);
c434dee6 4062
fd8ab9e5
AJ
4063 /* h->dynindx may be -1 if this symbol was marked to
4064 become local. */
4065 else if (h != NULL
c434dee6 4066 && h->dynindx != -1
d8045f23
NC
4067 && (IS_X86_64_PCREL_TYPE (r_type)
4068 || ! info->shared
4069 || ! SYMBOLIC_BIND (info, h)
4070 || ! h->def_regular))
70256ad8 4071 {
351f65ca 4072 outrel.r_info = htab->r_info (h->dynindx, r_type);
c434dee6 4073 outrel.r_addend = rel->r_addend;
70256ad8
AJ
4074 }
4075 else
4076 {
c434dee6 4077 /* This symbol is local, or marked to become local. */
248775ba 4078 if (r_type == htab->pointer_r_type)
607c0e09 4079 {
b34976b6 4080 relocate = TRUE;
351f65ca 4081 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
607c0e09
AS
4082 outrel.r_addend = relocation + rel->r_addend;
4083 }
64d25c44
L
4084 else if (r_type == R_X86_64_64
4085 && !ABI_64_P (output_bfd))
4086 {
4087 relocate = TRUE;
4088 outrel.r_info = htab->r_info (0,
4089 R_X86_64_RELATIVE64);
4090 outrel.r_addend = relocation + rel->r_addend;
8cf0d2dd
L
4091 /* Check addend overflow. */
4092 if ((outrel.r_addend & 0x80000000)
4093 != (rel->r_addend & 0x80000000))
4094 {
4095 const char *name;
268a8d3a 4096 int addend = rel->r_addend;
8cf0d2dd
L
4097 if (h && h->root.root.string)
4098 name = h->root.root.string;
4099 else
4100 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4101 sym, NULL);
6f2c9068
L
4102 if (addend < 0)
4103 (*_bfd_error_handler)
268a8d3a 4104 (_("%B: addend -0x%x in relocation %s against "
6f2c9068
L
4105 "symbol `%s' at 0x%lx in section `%A' is "
4106 "out of range"),
4107 input_bfd, input_section, addend,
4108 x86_64_elf_howto_table[r_type].name,
4109 name, (unsigned long) rel->r_offset);
4110 else
4111 (*_bfd_error_handler)
268a8d3a 4112 (_("%B: addend 0x%x in relocation %s against "
6f2c9068
L
4113 "symbol `%s' at 0x%lx in section `%A' is "
4114 "out of range"),
4115 input_bfd, input_section, addend,
4116 x86_64_elf_howto_table[r_type].name,
4117 name, (unsigned long) rel->r_offset);
8cf0d2dd
L
4118 bfd_set_error (bfd_error_bad_value);
4119 return FALSE;
4120 }
64d25c44 4121 }
607c0e09
AS
4122 else
4123 {
4124 long sindx;
4125
8517fae7 4126 if (bfd_is_abs_section (sec))
607c0e09
AS
4127 sindx = 0;
4128 else if (sec == NULL || sec->owner == NULL)
4129 {
4130 bfd_set_error (bfd_error_bad_value);
b34976b6 4131 return FALSE;
607c0e09
AS
4132 }
4133 else
4134 {
4135 asection *osec;
4136
74541ad4
AM
4137 /* We are turning this relocation into one
4138 against a section symbol. It would be
4139 proper to subtract the symbol's value,
4140 osec->vma, from the emitted reloc addend,
4141 but ld.so expects buggy relocs. */
607c0e09
AS
4142 osec = sec->output_section;
4143 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM
4144 if (sindx == 0)
4145 {
4146 asection *oi = htab->elf.text_index_section;
4147 sindx = elf_section_data (oi)->dynindx;
4148 }
4149 BFD_ASSERT (sindx != 0);
607c0e09
AS
4150 }
4151
351f65ca 4152 outrel.r_info = htab->r_info (sindx, r_type);
607c0e09
AS
4153 outrel.r_addend = relocation + rel->r_addend;
4154 }
70256ad8
AJ
4155 }
4156
cbe950e9 4157 sreloc = elf_section_data (input_section)->sreloc;
d8045f23 4158
62d78908
L
4159 if (sreloc == NULL || sreloc->contents == NULL)
4160 {
4161 r = bfd_reloc_notsupported;
4162 goto check_relocation_error;
4163 }
c434dee6 4164
351f65ca 4165 elf_append_rela (output_bfd, sreloc, &outrel);
70256ad8
AJ
4166
4167 /* If this reloc is against an external symbol, we do
4168 not want to fiddle with the addend. Otherwise, we
4169 need to include the symbol value so that it becomes
4170 an addend for the dynamic reloc. */
0f88be7a 4171 if (! relocate)
70256ad8
AJ
4172 continue;
4173 }
4174
4175 break;
4176
bffbf940 4177 case R_X86_64_TLSGD:
67a4f2b7
AO
4178 case R_X86_64_GOTPC32_TLSDESC:
4179 case R_X86_64_TLSDESC_CALL:
bffbf940 4180 case R_X86_64_GOTTPOFF:
bffbf940
JJ
4181 tls_type = GOT_UNKNOWN;
4182 if (h == NULL && local_got_offsets)
351f65ca 4183 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
bffbf940 4184 else if (h != NULL)
351f65ca 4185 tls_type = elf_x86_64_hash_entry (h)->tls_type;
142411ca 4186
351f65ca
L
4187 if (! elf_x86_64_tls_transition (info, input_bfd,
4188 input_section, contents,
4189 symtab_hdr, sym_hashes,
4190 &r_type, tls_type, rel,
4191 relend, h, r_symndx))
534a31f6 4192 return FALSE;
bffbf940
JJ
4193
4194 if (r_type == R_X86_64_TPOFF32)
4195 {
142411ca
L
4196 bfd_vma roff = rel->r_offset;
4197
bffbf940 4198 BFD_ASSERT (! unresolved_reloc);
142411ca 4199
351f65ca 4200 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
bffbf940 4201 {
52bc799a 4202 /* GD->LE transition. For 64bit, change
abcf1d52 4203 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
a3fadc9a 4204 .word 0x6666; rex64; call __tls_get_addr
52bc799a 4205 into:
bffbf940 4206 movq %fs:0, %rax
52bc799a
L
4207 leaq foo@tpoff(%rax), %rax
4208 For 32bit, change
4209 leaq foo@tlsgd(%rip), %rdi
4210 .word 0x6666; rex64; call __tls_get_addr
4211 into:
4212 movl %fs:0, %eax
5c98a14e
JJ
4213 leaq foo@tpoff(%rax), %rax
4214 For largepic, change:
4215 leaq foo@tlsgd(%rip), %rdi
4216 movabsq $__tls_get_addr@pltoff, %rax
4217 addq %rbx, %rax
4218 call *%rax
4219 into:
4220 movq %fs:0, %rax
4221 leaq foo@tpoff(%rax), %rax
4222 nopw 0x0(%rax,%rax,1) */
4223 int largepic = 0;
4224 if (ABI_64_P (output_bfd)
4225 && contents[roff + 5] == (bfd_byte) '\xb8')
4226 {
4227 memcpy (contents + roff - 3,
4228 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4229 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4230 largepic = 1;
4231 }
4232 else if (ABI_64_P (output_bfd))
52bc799a
L
4233 memcpy (contents + roff - 4,
4234 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4235 16);
4236 else
4237 memcpy (contents + roff - 3,
4238 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4239 15);
eb4ff4d6 4240 bfd_put_32 (output_bfd,
351f65ca 4241 elf_x86_64_tpoff (info, relocation),
5c98a14e
JJ
4242 contents + roff + 8 + largepic);
4243 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
bffbf940
JJ
4244 rel++;
4245 continue;
4246 }
351f65ca 4247 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
67a4f2b7
AO
4248 {
4249 /* GDesc -> LE transition.
4250 It's originally something like:
4251 leaq x@tlsdesc(%rip), %rax
4252
4253 Change it to:
c9736ba0 4254 movl $x@tpoff, %rax. */
67a4f2b7 4255
c9736ba0 4256 unsigned int val, type;
67a4f2b7 4257
67a4f2b7 4258 type = bfd_get_8 (input_bfd, contents + roff - 3);
67a4f2b7 4259 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO
4260 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
4261 contents + roff - 3);
4262 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
4263 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4264 contents + roff - 1);
eb4ff4d6 4265 bfd_put_32 (output_bfd,
351f65ca 4266 elf_x86_64_tpoff (info, relocation),
67a4f2b7
AO
4267 contents + roff);
4268 continue;
4269 }
351f65ca 4270 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
67a4f2b7
AO
4271 {
4272 /* GDesc -> LE transition.
4273 It's originally:
4274 call *(%rax)
4275 Turn it into:
142411ca 4276 xchg %ax,%ax. */
10efb593 4277 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO
4278 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4279 continue;
4280 }
351f65ca 4281 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
bffbf940 4282 {
bffbf940
JJ
4283 /* IE->LE transition:
4284 Originally it can be one of:
4285 movq foo@gottpoff(%rip), %reg
4286 addq foo@gottpoff(%rip), %reg
4287 We change it into:
4288 movq $foo, %reg
4289 leaq foo(%reg), %reg
4290 addq $foo, %reg. */
142411ca
L
4291
4292 unsigned int val, type, reg;
4293
4294 val = bfd_get_8 (input_bfd, contents + roff - 3);
4295 type = bfd_get_8 (input_bfd, contents + roff - 2);
4296 reg = bfd_get_8 (input_bfd, contents + roff - 1);
bffbf940 4297 reg >>= 3;
bffbf940
JJ
4298 if (type == 0x8b)
4299 {
4300 /* movq */
4301 if (val == 0x4c)
4302 bfd_put_8 (output_bfd, 0x49,
142411ca 4303 contents + roff - 3);
4a4c5f25
L
4304 else if (!ABI_64_P (output_bfd) && val == 0x44)
4305 bfd_put_8 (output_bfd, 0x41,
4306 contents + roff - 3);
bffbf940 4307 bfd_put_8 (output_bfd, 0xc7,
142411ca 4308 contents + roff - 2);
bffbf940 4309 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4310 contents + roff - 1);
bffbf940
JJ
4311 }
4312 else if (reg == 4)
4313 {
4314 /* addq -> addq - addressing with %rsp/%r12 is
4315 special */
4316 if (val == 0x4c)
4317 bfd_put_8 (output_bfd, 0x49,
142411ca 4318 contents + roff - 3);
4a4c5f25
L
4319 else if (!ABI_64_P (output_bfd) && val == 0x44)
4320 bfd_put_8 (output_bfd, 0x41,
4321 contents + roff - 3);
bffbf940 4322 bfd_put_8 (output_bfd, 0x81,
142411ca 4323 contents + roff - 2);
bffbf940 4324 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4325 contents + roff - 1);
bffbf940
JJ
4326 }
4327 else
4328 {
4329 /* addq -> leaq */
4330 if (val == 0x4c)
4331 bfd_put_8 (output_bfd, 0x4d,
142411ca 4332 contents + roff - 3);
4a4c5f25
L
4333 else if (!ABI_64_P (output_bfd) && val == 0x44)
4334 bfd_put_8 (output_bfd, 0x45,
4335 contents + roff - 3);
bffbf940 4336 bfd_put_8 (output_bfd, 0x8d,
142411ca 4337 contents + roff - 2);
bffbf940 4338 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
142411ca 4339 contents + roff - 1);
bffbf940 4340 }
eb4ff4d6 4341 bfd_put_32 (output_bfd,
351f65ca 4342 elf_x86_64_tpoff (info, relocation),
142411ca 4343 contents + roff);
bffbf940
JJ
4344 continue;
4345 }
142411ca
L
4346 else
4347 BFD_ASSERT (FALSE);
bffbf940
JJ
4348 }
4349
6de2ae4a 4350 if (htab->elf.sgot == NULL)
bffbf940
JJ
4351 abort ();
4352
4353 if (h != NULL)
67a4f2b7
AO
4354 {
4355 off = h->got.offset;
351f65ca 4356 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
67a4f2b7 4357 }
bffbf940
JJ
4358 else
4359 {
4360 if (local_got_offsets == NULL)
4361 abort ();
4362
4363 off = local_got_offsets[r_symndx];
67a4f2b7 4364 offplt = local_tlsdesc_gotents[r_symndx];
bffbf940
JJ
4365 }
4366
4367 if ((off & 1) != 0)
4368 off &= ~1;
26e41594 4369 else
bffbf940
JJ
4370 {
4371 Elf_Internal_Rela outrel;
bffbf940 4372 int dr_type, indx;
67a4f2b7 4373 asection *sreloc;
bffbf940 4374
6de2ae4a 4375 if (htab->elf.srelgot == NULL)
bffbf940
JJ
4376 abort ();
4377
67a4f2b7
AO
4378 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4379
4380 if (GOT_TLS_GDESC_P (tls_type))
4381 {
351f65ca 4382 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
67a4f2b7 4383 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
6de2ae4a
L
4384 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4385 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4386 + htab->elf.sgotplt->output_offset
67a4f2b7
AO
4387 + offplt
4388 + htab->sgotplt_jump_table_size);
6de2ae4a 4389 sreloc = htab->elf.srelplt;
67a4f2b7 4390 if (indx == 0)
351f65ca 4391 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
67a4f2b7
AO
4392 else
4393 outrel.r_addend = 0;
351f65ca 4394 elf_append_rela (output_bfd, sreloc, &outrel);
67a4f2b7
AO
4395 }
4396
6de2ae4a 4397 sreloc = htab->elf.srelgot;
67a4f2b7 4398
6de2ae4a
L
4399 outrel.r_offset = (htab->elf.sgot->output_section->vma
4400 + htab->elf.sgot->output_offset + off);
bffbf940 4401
67a4f2b7 4402 if (GOT_TLS_GD_P (tls_type))
bffbf940 4403 dr_type = R_X86_64_DTPMOD64;
67a4f2b7
AO
4404 else if (GOT_TLS_GDESC_P (tls_type))
4405 goto dr_done;
bffbf940
JJ
4406 else
4407 dr_type = R_X86_64_TPOFF64;
4408
6de2ae4a 4409 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
bffbf940 4410 outrel.r_addend = 0;
67a4f2b7
AO
4411 if ((dr_type == R_X86_64_TPOFF64
4412 || dr_type == R_X86_64_TLSDESC) && indx == 0)
351f65ca
L
4413 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4414 outrel.r_info = htab->r_info (indx, dr_type);
bffbf940 4415
351f65ca 4416 elf_append_rela (output_bfd, sreloc, &outrel);
bffbf940 4417
67a4f2b7 4418 if (GOT_TLS_GD_P (tls_type))
bffbf940
JJ
4419 {
4420 if (indx == 0)
4421 {
d40d037c 4422 BFD_ASSERT (! unresolved_reloc);
bffbf940 4423 bfd_put_64 (output_bfd,
351f65ca 4424 relocation - elf_x86_64_dtpoff_base (info),
6de2ae4a 4425 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
bffbf940
JJ
4426 }
4427 else
4428 {
4429 bfd_put_64 (output_bfd, 0,
6de2ae4a 4430 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4431 outrel.r_info = htab->r_info (indx,
bffbf940
JJ
4432 R_X86_64_DTPOFF64);
4433 outrel.r_offset += GOT_ENTRY_SIZE;
351f65ca 4434 elf_append_rela (output_bfd, sreloc,
464d3bd4 4435 &outrel);
bffbf940
JJ
4436 }
4437 }
4438
67a4f2b7 4439 dr_done:
bffbf940
JJ
4440 if (h != NULL)
4441 h->got.offset |= 1;
4442 else
4443 local_got_offsets[r_symndx] |= 1;
4444 }
4445
67a4f2b7
AO
4446 if (off >= (bfd_vma) -2
4447 && ! GOT_TLS_GDESC_P (tls_type))
bffbf940 4448 abort ();
351f65ca 4449 if (r_type == ELF32_R_TYPE (rel->r_info))
bffbf940 4450 {
67a4f2b7
AO
4451 if (r_type == R_X86_64_GOTPC32_TLSDESC
4452 || r_type == R_X86_64_TLSDESC_CALL)
6de2ae4a
L
4453 relocation = htab->elf.sgotplt->output_section->vma
4454 + htab->elf.sgotplt->output_offset
67a4f2b7
AO
4455 + offplt + htab->sgotplt_jump_table_size;
4456 else
6de2ae4a
L
4457 relocation = htab->elf.sgot->output_section->vma
4458 + htab->elf.sgot->output_offset + off;
b34976b6 4459 unresolved_reloc = FALSE;
bffbf940 4460 }
142411ca 4461 else
67a4f2b7 4462 {
142411ca 4463 bfd_vma roff = rel->r_offset;
67a4f2b7 4464
351f65ca 4465 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
142411ca 4466 {
52bc799a 4467 /* GD->IE transition. For 64bit, change
142411ca
L
4468 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4469 .word 0x6666; rex64; call __tls_get_addr@plt
52bc799a 4470 into:
142411ca 4471 movq %fs:0, %rax
52bc799a
L
4472 addq foo@gottpoff(%rip), %rax
4473 For 32bit, change
4474 leaq foo@tlsgd(%rip), %rdi
4475 .word 0x6666; rex64; call __tls_get_addr@plt
4476 into:
4477 movl %fs:0, %eax
5c98a14e
JJ
4478 addq foo@gottpoff(%rip), %rax
4479 For largepic, change:
4480 leaq foo@tlsgd(%rip), %rdi
4481 movabsq $__tls_get_addr@pltoff, %rax
4482 addq %rbx, %rax
4483 call *%rax
4484 into:
4485 movq %fs:0, %rax
4486 addq foo@gottpoff(%rax), %rax
4487 nopw 0x0(%rax,%rax,1) */
4488 int largepic = 0;
4489 if (ABI_64_P (output_bfd)
4490 && contents[roff + 5] == (bfd_byte) '\xb8')
4491 {
4492 memcpy (contents + roff - 3,
4493 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4494 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4495 largepic = 1;
4496 }
4497 else if (ABI_64_P (output_bfd))
52bc799a
L
4498 memcpy (contents + roff - 4,
4499 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4500 16);
4501 else
4502 memcpy (contents + roff - 3,
4503 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4504 15);
142411ca 4505
6de2ae4a
L
4506 relocation = (htab->elf.sgot->output_section->vma
4507 + htab->elf.sgot->output_offset + off
142411ca 4508 - roff
5c98a14e 4509 - largepic
142411ca
L
4510 - input_section->output_section->vma
4511 - input_section->output_offset
4512 - 12);
4513 bfd_put_32 (output_bfd, relocation,
5c98a14e
JJ
4514 contents + roff + 8 + largepic);
4515 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
142411ca
L
4516 rel++;
4517 continue;
4518 }
351f65ca 4519 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
142411ca
L
4520 {
4521 /* GDesc -> IE transition.
4522 It's originally something like:
4523 leaq x@tlsdesc(%rip), %rax
67a4f2b7 4524
142411ca 4525 Change it to:
c9736ba0 4526 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
67a4f2b7 4527
142411ca
L
4528 /* Now modify the instruction as appropriate. To
4529 turn a leaq into a movq in the form we use it, it
4530 suffices to change the second byte from 0x8d to
4531 0x8b. */
4532 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4533
4534 bfd_put_32 (output_bfd,
6de2ae4a
L
4535 htab->elf.sgot->output_section->vma
4536 + htab->elf.sgot->output_offset + off
142411ca
L
4537 - rel->r_offset
4538 - input_section->output_section->vma
4539 - input_section->output_offset
4540 - 4,
4541 contents + roff);
4542 continue;
4543 }
351f65ca 4544 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
142411ca
L
4545 {
4546 /* GDesc -> IE transition.
4547 It's originally:
4548 call *(%rax)
4549
4550 Change it to:
c9736ba0 4551 xchg %ax, %ax. */
142411ca 4552
142411ca
L
4553 bfd_put_8 (output_bfd, 0x66, contents + roff);
4554 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4555 continue;
4556 }
4557 else
4558 BFD_ASSERT (FALSE);
67a4f2b7 4559 }
bffbf940
JJ
4560 break;
4561
4562 case R_X86_64_TLSLD:
351f65ca
L
4563 if (! elf_x86_64_tls_transition (info, input_bfd,
4564 input_section, contents,
4565 symtab_hdr, sym_hashes,
4566 &r_type, GOT_UNKNOWN,
4567 rel, relend, h, r_symndx))
142411ca 4568 return FALSE;
a3fadc9a 4569
142411ca
L
4570 if (r_type != R_X86_64_TLSLD)
4571 {
bffbf940 4572 /* LD->LE transition:
a3fadc9a 4573 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
52bc799a
L
4574 For 64bit, we change it into:
4575 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4576 For 32bit, we change it into:
5c98a14e
JJ
4577 nopl 0x0(%rax); movl %fs:0, %eax.
4578 For largepic, change:
4579 leaq foo@tlsgd(%rip), %rdi
4580 movabsq $__tls_get_addr@pltoff, %rax
4581 addq %rbx, %rax
4582 call *%rax
4583 into:
4584 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4585 movq %fs:0, %eax */
142411ca
L
4586
4587 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5c98a14e
JJ
4588 if (ABI_64_P (output_bfd)
4589 && contents[rel->r_offset + 5] == (bfd_byte) '\xb8')
4590 memcpy (contents + rel->r_offset - 3,
4591 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4592 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4593 else if (ABI_64_P (output_bfd))
52bc799a
L
4594 memcpy (contents + rel->r_offset - 3,
4595 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4596 else
4597 memcpy (contents + rel->r_offset - 3,
4598 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5c98a14e 4599 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
bffbf940
JJ
4600 rel++;
4601 continue;
4602 }
4603
6de2ae4a 4604 if (htab->elf.sgot == NULL)
bffbf940
JJ
4605 abort ();
4606
4607 off = htab->tls_ld_got.offset;
4608 if (off & 1)
4609 off &= ~1;
4610 else
4611 {
4612 Elf_Internal_Rela outrel;
bffbf940 4613
6de2ae4a 4614 if (htab->elf.srelgot == NULL)
bffbf940
JJ
4615 abort ();
4616
6de2ae4a
L
4617 outrel.r_offset = (htab->elf.sgot->output_section->vma
4618 + htab->elf.sgot->output_offset + off);
bffbf940
JJ
4619
4620 bfd_put_64 (output_bfd, 0,
6de2ae4a 4621 htab->elf.sgot->contents + off);
bffbf940 4622 bfd_put_64 (output_bfd, 0,
6de2ae4a 4623 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4624 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
bffbf940 4625 outrel.r_addend = 0;
351f65ca 4626 elf_append_rela (output_bfd, htab->elf.srelgot,
464d3bd4 4627 &outrel);
bffbf940
JJ
4628 htab->tls_ld_got.offset |= 1;
4629 }
6de2ae4a
L
4630 relocation = htab->elf.sgot->output_section->vma
4631 + htab->elf.sgot->output_offset + off;
b34976b6 4632 unresolved_reloc = FALSE;
bffbf940
JJ
4633 break;
4634
4635 case R_X86_64_DTPOFF32:
1d85728f 4636 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
351f65ca 4637 relocation -= elf_x86_64_dtpoff_base (info);
bffbf940 4638 else
351f65ca 4639 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ
4640 break;
4641
4642 case R_X86_64_TPOFF32:
6769d501 4643 case R_X86_64_TPOFF64:
9b769489 4644 BFD_ASSERT (info->executable);
351f65ca 4645 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ
4646 break;
4647
a69ed7f7
L
4648 case R_X86_64_DTPOFF64:
4649 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
4650 relocation -= elf_x86_64_dtpoff_base (info);
4651 break;
4652
70256ad8
AJ
4653 default:
4654 break;
4655 }
8d88c4ca 4656
239e1f3a
AM
4657 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4658 because such sections are not SEC_ALLOC and thus ld.so will
4659 not process them. */
c434dee6 4660 if (unresolved_reloc
239e1f3a 4661 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM
4662 && h->def_dynamic)
4663 && _bfd_elf_section_offset (output_bfd, info, input_section,
4664 rel->r_offset) != (bfd_vma) -1)
a040981f
L
4665 {
4666 (*_bfd_error_handler)
4667 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4668 input_bfd,
4669 input_section,
4670 (long) rel->r_offset,
4671 howto->name,
4672 h->root.root.string);
4673 return FALSE;
4674 }
c434dee6 4675
cbe950e9 4676do_relocation:
8d88c4ca 4677 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ
4678 contents, rel->r_offset,
4679 relocation, rel->r_addend);
8d88c4ca 4680
62d78908 4681check_relocation_error:
8d88c4ca 4682 if (r != bfd_reloc_ok)
8da6118f 4683 {
c434dee6
AJ
4684 const char *name;
4685
4686 if (h != NULL)
4687 name = h->root.root.string;
4688 else
8da6118f 4689 {
c434dee6
AJ
4690 name = bfd_elf_string_from_elf_section (input_bfd,
4691 symtab_hdr->sh_link,
4692 sym->st_name);
4693 if (name == NULL)
b34976b6 4694 return FALSE;
c434dee6
AJ
4695 if (*name == '\0')
4696 name = bfd_section_name (input_bfd, sec);
4697 }
4698
4699 if (r == bfd_reloc_overflow)
4700 {
c434dee6 4701 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L
4702 (info, (h ? &h->root : NULL), name, howto->name,
4703 (bfd_vma) 0, input_bfd, input_section,
4704 rel->r_offset)))
b34976b6 4705 return FALSE;
c434dee6
AJ
4706 }
4707 else
4708 {
4709 (*_bfd_error_handler)
bb95161d 4710 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
d003868e 4711 input_bfd, input_section,
c434dee6 4712 (long) rel->r_offset, name, (int) r);
b34976b6 4713 return FALSE;
8da6118f
KH
4714 }
4715 }
8d88c4ca 4716 }
70256ad8 4717
b34976b6 4718 return TRUE;
70256ad8
AJ
4719}
4720
4721/* Finish up dynamic symbol handling. We set the contents of various
4722 dynamic sections here. */
4723
b34976b6 4724static bfd_boolean
351f65ca
L
4725elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4726 struct bfd_link_info *info,
4727 struct elf_link_hash_entry *h,
220cf809 4728 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
70256ad8 4729{
351f65ca 4730 struct elf_x86_64_link_hash_table *htab;
0ff2b86e
L
4731 const struct elf_x86_64_backend_data *abed;
4732 bfd_boolean use_plt_bnd;
70256ad8 4733
351f65ca 4734 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
4735 if (htab == NULL)
4736 return FALSE;
70256ad8 4737
0ff2b86e
L
4738 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
4739 section only if there is .plt section. */
4740 use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL;
4741 abed = (use_plt_bnd
4742 ? &elf_x86_64_bnd_arch_bed
4743 : get_elf_x86_64_backend_data (output_bfd));
4744
70256ad8
AJ
4745 if (h->plt.offset != (bfd_vma) -1)
4746 {
70256ad8 4747 bfd_vma plt_index;
0ff2b86e
L
4748 bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset;
4749 bfd_vma plt_plt_insn_end, plt_got_insn_size;
70256ad8 4750 Elf_Internal_Rela rela;
947216bf 4751 bfd_byte *loc;
0ff2b86e 4752 asection *plt, *gotplt, *relplt, *resolved_plt;
351f65ca 4753 const struct elf_backend_data *bed;
cbe950e9
L
4754
4755 /* When building a static executable, use .iplt, .igot.plt and
4756 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 4757 if (htab->elf.splt != NULL)
cbe950e9 4758 {
6de2ae4a
L
4759 plt = htab->elf.splt;
4760 gotplt = htab->elf.sgotplt;
4761 relplt = htab->elf.srelplt;
cbe950e9
L
4762 }
4763 else
4764 {
6de2ae4a
L
4765 plt = htab->elf.iplt;
4766 gotplt = htab->elf.igotplt;
4767 relplt = htab->elf.irelplt;
cbe950e9 4768 }
70256ad8
AJ
4769
4770 /* This symbol has an entry in the procedure linkage table. Set
407443a3 4771 it up. */
cbe950e9
L
4772 if ((h->dynindx == -1
4773 && !((h->forced_local || info->executable)
4774 && h->def_regular
4775 && h->type == STT_GNU_IFUNC))
4776 || plt == NULL
4777 || gotplt == NULL
4778 || relplt == NULL)
cec7f46a 4779 abort ();
70256ad8
AJ
4780
4781 /* Get the index in the procedure linkage table which
4782 corresponds to this symbol. This is the index of this symbol
4783 in all the symbols for which we are making plt entries. The
cbe950e9 4784 first entry in the procedure linkage table is reserved.
6bbec505 4785
cbe950e9 4786 Get the offset into the .got table of the entry that
407443a3 4787 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
cbe950e9
L
4788 bytes. The first three are reserved for the dynamic linker.
4789
4790 For static executables, we don't reserve anything. */
4791
6de2ae4a 4792 if (plt == htab->elf.splt)
cbe950e9 4793 {
eed180f8 4794 got_offset = h->plt.offset / abed->plt_entry_size - 1;
e1f98742 4795 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
cbe950e9
L
4796 }
4797 else
4798 {
eed180f8 4799 got_offset = h->plt.offset / abed->plt_entry_size;
e1f98742 4800 got_offset = got_offset * GOT_ENTRY_SIZE;
cbe950e9 4801 }
70256ad8 4802
0ff2b86e
L
4803 plt_plt_insn_end = abed->plt_plt_insn_end;
4804 plt_plt_offset = abed->plt_plt_offset;
4805 plt_got_insn_size = abed->plt_got_insn_size;
4806 plt_got_offset = abed->plt_got_offset;
4807 if (use_plt_bnd)
4808 {
4809 /* Use the second PLT with BND relocations. */
4810 const bfd_byte *plt_entry, *plt2_entry;
4811 struct elf_x86_64_link_hash_entry *eh
4812 = (struct elf_x86_64_link_hash_entry *) h;
4813
4814 if (eh->has_bnd_reloc)
4815 {
4816 plt_entry = elf_x86_64_bnd_plt_entry;
4817 plt2_entry = elf_x86_64_bnd_plt2_entry;
4818 }
4819 else
4820 {
4821 plt_entry = elf_x86_64_legacy_plt_entry;
4822 plt2_entry = elf_x86_64_legacy_plt2_entry;
4823
4824 /* Subtract 1 since there is no BND prefix. */
4825 plt_plt_insn_end -= 1;
4826 plt_plt_offset -= 1;
4827 plt_got_insn_size -= 1;
4828 plt_got_offset -= 1;
4829 }
4830
4831 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry)
4832 == sizeof (elf_x86_64_legacy_plt_entry));
4833
4834 /* Fill in the entry in the procedure linkage table. */
4835 memcpy (plt->contents + h->plt.offset,
4836 plt_entry, sizeof (elf_x86_64_legacy_plt_entry));
4837 /* Fill in the entry in the second PLT. */
4838 memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset,
4839 plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry));
4840
4841 resolved_plt = htab->plt_bnd;
4842 plt_offset = eh->plt_bnd.offset;
4843 }
4844 else
4845 {
4846 /* Fill in the entry in the procedure linkage table. */
4847 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
4848 abed->plt_entry_size);
4849
4850 resolved_plt = plt;
4851 plt_offset = h->plt.offset;
4852 }
eed180f8
RM
4853
4854 /* Insert the relocation positions of the plt section. */
4855
4856 /* Put offset the PC-relative instruction referring to the GOT entry,
4857 subtracting the size of that instruction. */
653165cc 4858 bfd_put_32 (output_bfd,
eed180f8
RM
4859 (gotplt->output_section->vma
4860 + gotplt->output_offset
4861 + got_offset
0ff2b86e
L
4862 - resolved_plt->output_section->vma
4863 - resolved_plt->output_offset
4864 - plt_offset
4865 - plt_got_insn_size),
4866 resolved_plt->contents + plt_offset + plt_got_offset);
cbe950e9 4867
653165cc 4868 /* Fill in the entry in the global offset table, initially this
eed180f8 4869 points to the second part of the PLT entry. */
cbe950e9
L
4870 bfd_put_64 (output_bfd, (plt->output_section->vma
4871 + plt->output_offset
eed180f8 4872 + h->plt.offset + abed->plt_lazy_offset),
cbe950e9 4873 gotplt->contents + got_offset);
70256ad8
AJ
4874
4875 /* Fill in the entry in the .rela.plt section. */
cbe950e9
L
4876 rela.r_offset = (gotplt->output_section->vma
4877 + gotplt->output_offset
70256ad8 4878 + got_offset);
cbe950e9
L
4879 if (h->dynindx == -1
4880 || ((info->executable
4881 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4882 && h->def_regular
4883 && h->type == STT_GNU_IFUNC))
4884 {
4885 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4886 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
351f65ca 4887 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
cbe950e9
L
4888 rela.r_addend = (h->root.u.def.value
4889 + h->root.u.def.section->output_section->vma
4890 + h->root.u.def.section->output_offset);
e1f98742
L
4891 /* R_X86_64_IRELATIVE comes last. */
4892 plt_index = htab->next_irelative_index--;
cbe950e9
L
4893 }
4894 else
4895 {
351f65ca 4896 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
cbe950e9 4897 rela.r_addend = 0;
e1f98742
L
4898 plt_index = htab->next_jump_slot_index++;
4899 }
4900
4901 /* Don't fill PLT entry for static executables. */
4902 if (plt == htab->elf.splt)
4903 {
4904 /* Put relocation index. */
4905 bfd_put_32 (output_bfd, plt_index,
eed180f8 4906 plt->contents + h->plt.offset + abed->plt_reloc_offset);
e1f98742 4907 /* Put offset for jmp .PLT0. */
0ff2b86e
L
4908 bfd_put_32 (output_bfd, - (h->plt.offset + plt_plt_insn_end),
4909 plt->contents + h->plt.offset + plt_plt_offset);
cbe950e9 4910 }
351f65ca
L
4911
4912 bed = get_elf_backend_data (output_bfd);
4913 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
82e96e07 4914 bed->s->swap_reloca_out (output_bfd, &rela, loc);
70256ad8 4915
f5385ebf 4916 if (!h->def_regular)
70256ad8
AJ
4917 {
4918 /* Mark the symbol as undefined, rather than as defined in
47a9f7b3
JJ
4919 the .plt section. Leave the value if there were any
4920 relocations where pointer equality matters (this is a clue
c434dee6
AJ
4921 for the dynamic linker, to make function pointer
4922 comparisons work between an application and shared
47a9f7b3
JJ
4923 library), otherwise set it to zero. If a function is only
4924 called from a binary, there is no need to slow down
4925 shared libraries because of that. */
70256ad8 4926 sym->st_shndx = SHN_UNDEF;
f5385ebf 4927 if (!h->pointer_equality_needed)
47a9f7b3 4928 sym->st_value = 0;
70256ad8
AJ
4929 }
4930 }
4931
bffbf940 4932 if (h->got.offset != (bfd_vma) -1
351f65ca
L
4933 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
4934 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 4935 {
053579d7
AJ
4936 Elf_Internal_Rela rela;
4937
4938 /* This symbol has an entry in the global offset table. Set it
bffbf940 4939 up. */
6de2ae4a 4940 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
c434dee6 4941 abort ();
053579d7 4942
6de2ae4a
L
4943 rela.r_offset = (htab->elf.sgot->output_section->vma
4944 + htab->elf.sgot->output_offset
dc810e39 4945 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ
4946
4947 /* If this is a static link, or it is a -Bsymbolic link and the
4948 symbol is defined locally or was forced to be local because
4949 of a version file, we just want to emit a RELATIVE reloc.
4950 The entry in the global offset table will already have been
4951 initialized in the relocate_section function. */
710ab287 4952 if (h->def_regular
0018b0a3
L
4953 && h->type == STT_GNU_IFUNC)
4954 {
710ab287
L
4955 if (info->shared)
4956 {
4957 /* Generate R_X86_64_GLOB_DAT. */
4958 goto do_glob_dat;
4959 }
4960 else
4961 {
90d60710
L
4962 asection *plt;
4963
710ab287
L
4964 if (!h->pointer_equality_needed)
4965 abort ();
4966
4967 /* For non-shared object, we can't use .got.plt, which
4968 contains the real function addres if we need pointer
4969 equality. We load the GOT entry with the PLT entry. */
90d60710 4970 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L
4971 bfd_put_64 (output_bfd, (plt->output_section->vma
4972 + plt->output_offset
4973 + h->plt.offset),
6de2ae4a 4974 htab->elf.sgot->contents + h->got.offset);
710ab287
L
4975 return TRUE;
4976 }
0018b0a3
L
4977 }
4978 else if (info->shared
4979 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 4980 {
41bed6dd
L
4981 if (!h->def_regular)
4982 return FALSE;
cc78d0af 4983 BFD_ASSERT((h->got.offset & 1) != 0);
351f65ca 4984 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
053579d7
AJ
4985 rela.r_addend = (h->root.u.def.value
4986 + h->root.u.def.section->output_section->vma
4987 + h->root.u.def.section->output_offset);
4988 }
4989 else
4990 {
4991 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 4992do_glob_dat:
c434dee6 4993 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 4994 htab->elf.sgot->contents + h->got.offset);
351f65ca 4995 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
053579d7
AJ
4996 rela.r_addend = 0;
4997 }
4998
351f65ca 4999 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
053579d7
AJ
5000 }
5001
f5385ebf 5002 if (h->needs_copy)
70256ad8 5003 {
70256ad8
AJ
5004 Elf_Internal_Rela rela;
5005
5006 /* This symbol needs a copy reloc. Set it up. */
5007
c434dee6
AJ
5008 if (h->dynindx == -1
5009 || (h->root.type != bfd_link_hash_defined
5010 && h->root.type != bfd_link_hash_defweak)
5011 || htab->srelbss == NULL)
5012 abort ();
70256ad8
AJ
5013
5014 rela.r_offset = (h->root.u.def.value
5015 + h->root.u.def.section->output_section->vma
5016 + h->root.u.def.section->output_offset);
351f65ca 5017 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
70256ad8 5018 rela.r_addend = 0;
351f65ca 5019 elf_append_rela (output_bfd, htab->srelbss, &rela);
70256ad8
AJ
5020 }
5021
b34976b6 5022 return TRUE;
70256ad8
AJ
5023}
5024
c25bc9fc
L
5025/* Finish up local dynamic symbol handling. We set the contents of
5026 various dynamic sections here. */
5027
5028static bfd_boolean
351f65ca 5029elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
c25bc9fc
L
5030{
5031 struct elf_link_hash_entry *h
5032 = (struct elf_link_hash_entry *) *slot;
5033 struct bfd_link_info *info
eed180f8 5034 = (struct bfd_link_info *) inf;
c25bc9fc 5035
351f65ca 5036 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
c25bc9fc
L
5037 info, h, NULL);
5038}
5039
c434dee6
AJ
5040/* Used to decide how to sort relocs in an optimal manner for the
5041 dynamic linker, before writing them out. */
5042
5043static enum elf_reloc_type_class
7e612e98
AM
5044elf_x86_64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
5045 const asection *rel_sec ATTRIBUTE_UNUSED,
5046 const Elf_Internal_Rela *rela)
c434dee6 5047{
351f65ca 5048 switch ((int) ELF32_R_TYPE (rela->r_info))
c434dee6
AJ
5049 {
5050 case R_X86_64_RELATIVE:
1da80baa 5051 case R_X86_64_RELATIVE64:
c434dee6
AJ
5052 return reloc_class_relative;
5053 case R_X86_64_JUMP_SLOT:
5054 return reloc_class_plt;
5055 case R_X86_64_COPY:
5056 return reloc_class_copy;
5057 default:
5058 return reloc_class_normal;
5059 }
5060}
5061
70256ad8
AJ
5062/* Finish up the dynamic sections. */
5063
b34976b6 5064static bfd_boolean
351f65ca
L
5065elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
5066 struct bfd_link_info *info)
70256ad8 5067{
351f65ca 5068 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ
5069 bfd *dynobj;
5070 asection *sdyn;
0ff2b86e 5071 const struct elf_x86_64_backend_data *abed;
70256ad8 5072
351f65ca 5073 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC
5074 if (htab == NULL)
5075 return FALSE;
5076
0ff2b86e
L
5077 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5078 section only if there is .plt section. */
5079 abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL
5080 ? &elf_x86_64_bnd_arch_bed
5081 : get_elf_x86_64_backend_data (output_bfd));
5082
c434dee6 5083 dynobj = htab->elf.dynobj;
3d4d4302 5084 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
70256ad8 5085
c434dee6 5086 if (htab->elf.dynamic_sections_created)
70256ad8 5087 {
82e96e07
L
5088 bfd_byte *dyncon, *dynconend;
5089 const struct elf_backend_data *bed;
5090 bfd_size_type sizeof_dyn;
70256ad8 5091
6de2ae4a 5092 if (sdyn == NULL || htab->elf.sgot == NULL)
c434dee6 5093 abort ();
70256ad8 5094
82e96e07
L
5095 bed = get_elf_backend_data (dynobj);
5096 sizeof_dyn = bed->s->sizeof_dyn;
5097 dyncon = sdyn->contents;
5098 dynconend = sdyn->contents + sdyn->size;
5099 for (; dyncon < dynconend; dyncon += sizeof_dyn)
70256ad8
AJ
5100 {
5101 Elf_Internal_Dyn dyn;
70256ad8
AJ
5102 asection *s;
5103
82e96e07 5104 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
70256ad8
AJ
5105
5106 switch (dyn.d_tag)
5107 {
5108 default:
053579d7 5109 continue;
70256ad8
AJ
5110
5111 case DT_PLTGOT:
6de2ae4a 5112 s = htab->elf.sgotplt;
8c37241b 5113 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
c434dee6 5114 break;
70256ad8
AJ
5115
5116 case DT_JMPREL:
6de2ae4a 5117 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
c434dee6 5118 break;
70256ad8 5119
c434dee6 5120 case DT_PLTRELSZ:
6de2ae4a 5121 s = htab->elf.srelplt->output_section;
eea6121a 5122 dyn.d_un.d_val = s->size;
70256ad8
AJ
5123 break;
5124
5125 case DT_RELASZ:
c434dee6
AJ
5126 /* The procedure linkage table relocs (DT_JMPREL) should
5127 not be included in the overall relocs (DT_RELA).
5128 Therefore, we override the DT_RELASZ entry here to
5129 make it not include the JMPREL relocs. Since the
5130 linker script arranges for .rela.plt to follow all
5131 other relocation sections, we don't have to worry
5132 about changing the DT_RELA entry. */
6de2ae4a 5133 if (htab->elf.srelplt != NULL)
70256ad8 5134 {
6de2ae4a 5135 s = htab->elf.srelplt->output_section;
eea6121a 5136 dyn.d_un.d_val -= s->size;
70256ad8
AJ
5137 }
5138 break;
67a4f2b7
AO
5139
5140 case DT_TLSDESC_PLT:
6de2ae4a 5141 s = htab->elf.splt;
67a4f2b7
AO
5142 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5143 + htab->tlsdesc_plt;
5144 break;
5145
5146 case DT_TLSDESC_GOT:
6de2ae4a 5147 s = htab->elf.sgot;
67a4f2b7
AO
5148 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5149 + htab->tlsdesc_got;
5150 break;
70256ad8 5151 }
c434dee6 5152
82e96e07 5153 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
70256ad8
AJ
5154 }
5155
c434dee6 5156 /* Fill in the special first entry in the procedure linkage table. */
6de2ae4a 5157 if (htab->elf.splt && htab->elf.splt->size > 0)
70256ad8 5158 {
653165cc 5159 /* Fill in the first entry in the procedure linkage table. */
eed180f8
RM
5160 memcpy (htab->elf.splt->contents,
5161 abed->plt0_entry, abed->plt_entry_size);
653165cc
AJ
5162 /* Add offset for pushq GOT+8(%rip), since the instruction
5163 uses 6 bytes subtract this value. */
5164 bfd_put_32 (output_bfd,
6de2ae4a
L
5165 (htab->elf.sgotplt->output_section->vma
5166 + htab->elf.sgotplt->output_offset
653165cc 5167 + 8
6de2ae4a
L
5168 - htab->elf.splt->output_section->vma
5169 - htab->elf.splt->output_offset
653165cc 5170 - 6),
eed180f8
RM
5171 htab->elf.splt->contents + abed->plt0_got1_offset);
5172 /* Add offset for the PC-relative instruction accessing GOT+16,
5173 subtracting the offset to the end of that instruction. */
653165cc 5174 bfd_put_32 (output_bfd,
6de2ae4a
L
5175 (htab->elf.sgotplt->output_section->vma
5176 + htab->elf.sgotplt->output_offset
653165cc 5177 + 16
6de2ae4a
L
5178 - htab->elf.splt->output_section->vma
5179 - htab->elf.splt->output_offset
eed180f8
RM
5180 - abed->plt0_got2_insn_end),
5181 htab->elf.splt->contents + abed->plt0_got2_offset);
653165cc 5182
eed180f8
RM
5183 elf_section_data (htab->elf.splt->output_section)
5184 ->this_hdr.sh_entsize = abed->plt_entry_size;
67a4f2b7
AO
5185
5186 if (htab->tlsdesc_plt)
5187 {
5188 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 5189 htab->elf.sgot->contents + htab->tlsdesc_got);
67a4f2b7 5190
6de2ae4a 5191 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
eed180f8 5192 abed->plt0_entry, abed->plt_entry_size);
67a4f2b7
AO
5193
5194 /* Add offset for pushq GOT+8(%rip), since the
5195 instruction uses 6 bytes subtract this value. */
5196 bfd_put_32 (output_bfd,
6de2ae4a
L
5197 (htab->elf.sgotplt->output_section->vma
5198 + htab->elf.sgotplt->output_offset
67a4f2b7 5199 + 8
6de2ae4a
L
5200 - htab->elf.splt->output_section->vma
5201 - htab->elf.splt->output_offset
67a4f2b7
AO
5202 - htab->tlsdesc_plt
5203 - 6),
eed180f8
RM
5204 htab->elf.splt->contents
5205 + htab->tlsdesc_plt + abed->plt0_got1_offset);
5206 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5207 where TGD stands for htab->tlsdesc_got, subtracting the offset
5208 to the end of that instruction. */
67a4f2b7 5209 bfd_put_32 (output_bfd,
6de2ae4a
L
5210 (htab->elf.sgot->output_section->vma
5211 + htab->elf.sgot->output_offset
67a4f2b7 5212 + htab->tlsdesc_got
6de2ae4a
L
5213 - htab->elf.splt->output_section->vma
5214 - htab->elf.splt->output_offset
67a4f2b7 5215 - htab->tlsdesc_plt
eed180f8
RM
5216 - abed->plt0_got2_insn_end),
5217 htab->elf.splt->contents
5218 + htab->tlsdesc_plt + abed->plt0_got2_offset);
67a4f2b7 5219 }
70256ad8 5220 }
70256ad8
AJ
5221 }
5222
0ff2b86e
L
5223 if (htab->plt_bnd != NULL)
5224 elf_section_data (htab->plt_bnd->output_section)
5225 ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry);
5226
6de2ae4a 5227 if (htab->elf.sgotplt)
70256ad8 5228 {
56d4289c
L
5229 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5230 {
5231 (*_bfd_error_handler)
5232 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5233 return FALSE;
5234 }
5235
c434dee6 5236 /* Fill in the first three entries in the global offset table. */
6de2ae4a 5237 if (htab->elf.sgotplt->size > 0)
c434dee6
AJ
5238 {
5239 /* Set the first entry in the global offset table to the address of
5240 the dynamic section. */
5241 if (sdyn == NULL)
6de2ae4a 5242 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
c434dee6
AJ
5243 else
5244 bfd_put_64 (output_bfd,
5245 sdyn->output_section->vma + sdyn->output_offset,
6de2ae4a 5246 htab->elf.sgotplt->contents);
c434dee6 5247 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6de2ae4a
L
5248 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
5249 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
c434dee6 5250 }
70256ad8 5251
6de2ae4a 5252 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
c434dee6
AJ
5253 GOT_ENTRY_SIZE;
5254 }
70256ad8 5255
e41b3a13 5256 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM
5257 if (htab->plt_eh_frame != NULL
5258 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ
5259 {
5260 if (htab->elf.splt != NULL
5261 && htab->elf.splt->size != 0
5262 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5263 && htab->elf.splt->output_section != NULL
5264 && htab->plt_eh_frame->output_section != NULL)
5265 {
5266 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5267 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5268 + htab->plt_eh_frame->output_offset
5269 + PLT_FDE_START_OFFSET;
5270 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5271 htab->plt_eh_frame->contents
5272 + PLT_FDE_START_OFFSET);
5273 }
dbaa2011 5274 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ
5275 {
5276 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5277 htab->plt_eh_frame,
5278 htab->plt_eh_frame->contents))
5279 return FALSE;
5280 }
5281 }
5282
6de2ae4a
L
5283 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5284 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
8c37241b
JJ
5285 = GOT_ENTRY_SIZE;
5286
c25bc9fc
L
5287 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5288 htab_traverse (htab->loc_hash_table,
351f65ca 5289 elf_x86_64_finish_local_dynamic_symbol,
c25bc9fc
L
5290 info);
5291
b34976b6 5292 return TRUE;
8d88c4ca
NC
5293}
5294
4c45e5c9
JJ
5295/* Return address for Ith PLT stub in section PLT, for relocation REL
5296 or (bfd_vma) -1 if it should not be included. */
5297
5298static bfd_vma
351f65ca
L
5299elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
5300 const arelent *rel ATTRIBUTE_UNUSED)
4c45e5c9 5301{
eed180f8 5302 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
4c45e5c9 5303}
8df9fc9d 5304
0ff2b86e
L
5305/* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5306 support. */
5307
5308static long
5309elf_x86_64_get_synthetic_symtab (bfd *abfd,
5310 long symcount,
5311 asymbol **syms,
5312 long dynsymcount,
5313 asymbol **dynsyms,
5314 asymbol **ret)
5315{
5316 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5317 asection *relplt;
5318 asymbol *s;
5319 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5320 arelent *p;
5321 long count, i, n;
5322 size_t size;
5323 Elf_Internal_Shdr *hdr;
5324 char *names;
5325 asection *plt;
5326 bfd_vma addr;
5327
5328 plt = bfd_get_section_by_name (abfd, ".plt.bnd");
5329 /* Use the generic ELF version if there is no .plt.bnd section. */
5330 if (plt == NULL)
5331 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
5332 dynsymcount, dynsyms, ret);
5333
5334 *ret = NULL;
5335
5336 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5337 return 0;
5338
5339 if (dynsymcount <= 0)
5340 return 0;
5341
5342 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
5343 if (relplt == NULL)
5344 return 0;
5345
5346 hdr = &elf_section_data (relplt)->this_hdr;
5347 if (hdr->sh_link != elf_dynsymtab (abfd)
5348 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
5349 return 0;
5350
5351 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5352 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5353 return -1;
5354
5355 count = relplt->size / hdr->sh_entsize;
5356 size = count * sizeof (asymbol);
5357 p = relplt->relocation;
5358 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
5359 {
5360 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
5361 if (p->addend != 0)
5362 size += sizeof ("+0x") - 1 + 8 + 8;
5363 }
5364
5365 s = *ret = (asymbol *) bfd_malloc (size);
5366 if (s == NULL)
5367 return -1;
5368
5369 names = (char *) (s + count);
5370 p = relplt->relocation;
5371 n = 0;
5372 addr = 0;
5373 for (i = 0; i < count; i++, p++)
5374 {
5375 size_t len;
5376
5377 *s = **p->sym_ptr_ptr;
5378 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
5379 we are defining a symbol, ensure one of them is set. */
5380 if ((s->flags & BSF_LOCAL) == 0)
5381 s->flags |= BSF_GLOBAL;
5382 s->flags |= BSF_SYNTHETIC;
5383 s->section = plt;
5384 s->value = addr;
5385 s->name = names;
5386 s->udata.p = NULL;
5387 len = strlen ((*p->sym_ptr_ptr)->name);
5388 memcpy (names, (*p->sym_ptr_ptr)->name, len);
5389 names += len;
5390 if (p->addend != 0)
5391 {
5392 char buf[30], *a;
5393
5394 memcpy (names, "+0x", sizeof ("+0x") - 1);
5395 names += sizeof ("+0x") - 1;
5396 bfd_sprintf_vma (abfd, buf, p->addend);
5397 for (a = buf; *a == '0'; ++a)
5398 ;
5399 len = strlen (a);
5400 memcpy (names, a, len);
5401 names += len;
5402 }
5403 memcpy (names, "@plt", sizeof ("@plt"));
5404 names += sizeof ("@plt");
5405 ++s, ++n;
5406 addr += sizeof (elf_x86_64_legacy_plt2_entry);
5407 }
5408
5409 return n;
5410}
5411
d2b2c203
DJ
5412/* Handle an x86-64 specific section when reading an object file. This
5413 is called when elfcode.h finds a section with an unknown type. */
5414
5415static bfd_boolean
0c723101
L
5416elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
5417 const char *name, int shindex)
d2b2c203
DJ
5418{
5419 if (hdr->sh_type != SHT_X86_64_UNWIND)
5420 return FALSE;
5421
6dc132d9 5422 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
d2b2c203
DJ
5423 return FALSE;
5424
5425 return TRUE;
5426}
5427
3b22753a
L
5428/* Hook called by the linker routine which adds symbols from an object
5429 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5430 of .bss. */
5431
5432static bfd_boolean
351f65ca
L
5433elf_x86_64_add_symbol_hook (bfd *abfd,
5434 struct bfd_link_info *info,
5435 Elf_Internal_Sym *sym,
5436 const char **namep ATTRIBUTE_UNUSED,
5437 flagword *flagsp ATTRIBUTE_UNUSED,
5438 asection **secp,
5439 bfd_vma *valp)
3b22753a
L
5440{
5441 asection *lcomm;
5442
5443 switch (sym->st_shndx)
5444 {
5445 case SHN_X86_64_LCOMMON:
5446 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
5447 if (lcomm == NULL)
5448 {
5449 lcomm = bfd_make_section_with_flags (abfd,
5450 "LARGE_COMMON",
5451 (SEC_ALLOC
5452 | SEC_IS_COMMON
5453 | SEC_LINKER_CREATED));
5454 if (lcomm == NULL)
5455 return FALSE;
5456 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
5457 }
5458 *secp = lcomm;
5459 *valp = sym->st_size;
c35bdf6e 5460 return TRUE;
3b22753a 5461 }
d8045f23 5462
c16153ae 5463 if ((abfd->flags & DYNAMIC) == 0
f64b2e8d
NC
5464 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5465 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
5466 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
d8045f23 5467
3b22753a
L
5468 return TRUE;
5469}
5470
5471
5472/* Given a BFD section, try to locate the corresponding ELF section
5473 index. */
5474
5475static bfd_boolean
351f65ca
L
5476elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
5477 asection *sec, int *index_return)
3b22753a
L
5478{
5479 if (sec == &_bfd_elf_large_com_section)
5480 {
91d6fa6a 5481 *index_return = SHN_X86_64_LCOMMON;
3b22753a
L
5482 return TRUE;
5483 }
5484 return FALSE;
5485}
5486
5487/* Process a symbol. */
5488
5489static void
351f65ca
L
5490elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5491 asymbol *asym)
3b22753a
L
5492{
5493 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5494
5495 switch (elfsym->internal_elf_sym.st_shndx)
5496 {
5497 case SHN_X86_64_LCOMMON:
5498 asym->section = &_bfd_elf_large_com_section;
5499 asym->value = elfsym->internal_elf_sym.st_size;
5500 /* Common symbol doesn't set BSF_GLOBAL. */
5501 asym->flags &= ~BSF_GLOBAL;
5502 break;
5503 }
5504}
5505
5506static bfd_boolean
351f65ca 5507elf_x86_64_common_definition (Elf_Internal_Sym *sym)
3b22753a
L
5508{
5509 return (sym->st_shndx == SHN_COMMON
5510 || sym->st_shndx == SHN_X86_64_LCOMMON);
5511}
5512
5513static unsigned int
351f65ca 5514elf_x86_64_common_section_index (asection *sec)
3b22753a
L
5515{
5516 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5517 return SHN_COMMON;
5518 else
5519 return SHN_X86_64_LCOMMON;
5520}
5521
5522static asection *
351f65ca 5523elf_x86_64_common_section (asection *sec)
3b22753a
L
5524{
5525 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5526 return bfd_com_section_ptr;
5527 else
5528 return &_bfd_elf_large_com_section;
5529}
5530
5531static bfd_boolean
5d13b3b3
AM
5532elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
5533 const Elf_Internal_Sym *sym,
351f65ca 5534 asection **psec,
5d13b3b3
AM
5535 bfd_boolean newdef,
5536 bfd_boolean olddef,
351f65ca 5537 bfd *oldbfd,
5d13b3b3 5538 const asection *oldsec)
3b22753a
L
5539{
5540 /* A normal common symbol and a large common symbol result in a
00492999
L
5541 normal common symbol. We turn the large common symbol into a
5542 normal one. */
5d13b3b3 5543 if (!olddef
3b22753a 5544 && h->root.type == bfd_link_hash_common
5d13b3b3
AM
5545 && !newdef
5546 && bfd_is_com_section (*psec)
5547 && oldsec != *psec)
3b22753a 5548 {
00492999 5549 if (sym->st_shndx == SHN_COMMON
5d13b3b3 5550 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
00492999
L
5551 {
5552 h->root.u.c.p->section
5553 = bfd_make_section_old_way (oldbfd, "COMMON");
5554 h->root.u.c.p->section->flags = SEC_ALLOC;
5555 }
5556 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5d13b3b3
AM
5557 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
5558 *psec = bfd_com_section_ptr;
3b22753a
L
5559 }
5560
5561 return TRUE;
5562}
5563
5564static int
351f65ca
L
5565elf_x86_64_additional_program_headers (bfd *abfd,
5566 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3b22753a
L
5567{
5568 asection *s;
9a2e389a 5569 int count = 0;
3b22753a
L
5570
5571 /* Check to see if we need a large readonly segment. */
5572 s = bfd_get_section_by_name (abfd, ".lrodata");
5573 if (s && (s->flags & SEC_LOAD))
5574 count++;
5575
5576 /* Check to see if we need a large data segment. Since .lbss sections
5577 is placed right after the .bss section, there should be no need for
5578 a large data segment just because of .lbss. */
5579 s = bfd_get_section_by_name (abfd, ".ldata");
5580 if (s && (s->flags & SEC_LOAD))
5581 count++;
5582
5583 return count;
5584}
5585
fdc90cb4
JJ
5586/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5587
5588static bfd_boolean
351f65ca 5589elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
fdc90cb4
JJ
5590{
5591 if (h->plt.offset != (bfd_vma) -1
5592 && !h->def_regular
5593 && !h->pointer_equality_needed)
5594 return FALSE;
5595
5596 return _bfd_elf_hash_symbol (h);
5597}
5598
c543bf9a
L
5599/* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5600
5601static bfd_boolean
5602elf_x86_64_relocs_compatible (const bfd_target *input,
5603 const bfd_target *output)
5604{
5605 return ((xvec_get_elf_backend_data (input)->s->elfclass
5606 == xvec_get_elf_backend_data (output)->s->elfclass)
5607 && _bfd_elf_relocs_compatible (input, output));
5608}
5609
9a2e389a 5610static const struct bfd_elf_special_section
351f65ca 5611 elf_x86_64_special_sections[]=
3b22753a 5612{
0112cd26
NC
5613 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5614 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5615 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
5616 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5617 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5618 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5619 { NULL, 0, 0, 0, 0 }
3b22753a
L
5620};
5621
6d00b590 5622#define TARGET_LITTLE_SYM x86_64_elf64_vec
70256ad8
AJ
5623#define TARGET_LITTLE_NAME "elf64-x86-64"
5624#define ELF_ARCH bfd_arch_i386
ae95ffa6 5625#define ELF_TARGET_ID X86_64_ELF_DATA
70256ad8 5626#define ELF_MACHINE_CODE EM_X86_64
f7661549 5627#define ELF_MAXPAGESIZE 0x200000
2043964e 5628#define ELF_MINPAGESIZE 0x1000
24718e3b 5629#define ELF_COMMONPAGESIZE 0x1000
70256ad8
AJ
5630
5631#define elf_backend_can_gc_sections 1
51b64d56 5632#define elf_backend_can_refcount 1
70256ad8
AJ
5633#define elf_backend_want_got_plt 1
5634#define elf_backend_plt_readonly 1
5635#define elf_backend_want_plt_sym 0
5636#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 5637#define elf_backend_rela_normal 1
e41b3a13 5638#define elf_backend_plt_alignment 4
70256ad8 5639
351f65ca 5640#define elf_info_to_howto elf_x86_64_info_to_howto
70256ad8 5641
70256ad8 5642#define bfd_elf64_bfd_link_hash_table_create \
351f65ca 5643 elf_x86_64_link_hash_table_create
351f65ca 5644#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
157090f7 5645#define bfd_elf64_bfd_reloc_name_lookup \
351f65ca 5646 elf_x86_64_reloc_name_lookup
70256ad8 5647
351f65ca 5648#define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
c543bf9a 5649#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
351f65ca
L
5650#define elf_backend_check_relocs elf_x86_64_check_relocs
5651#define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5652#define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5653#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5654#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5655#define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5656#define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5657#define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5658#define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
8fd79e71
L
5659#ifdef CORE_HEADER
5660#define elf_backend_write_core_note elf_x86_64_write_core_note
5661#endif
351f65ca
L
5662#define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5663#define elf_backend_relocate_section elf_x86_64_relocate_section
5664#define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5665#define elf_backend_always_size_sections elf_x86_64_always_size_sections
74541ad4 5666#define elf_backend_init_index_section _bfd_elf_init_1_index_section
351f65ca 5667#define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
407443a3 5668#define elf_backend_object_p elf64_x86_64_elf_object_p
351f65ca 5669#define bfd_elf64_mkobject elf_x86_64_mkobject
0ff2b86e 5670#define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
8d88c4ca 5671
d2b2c203 5672#define elf_backend_section_from_shdr \
351f65ca 5673 elf_x86_64_section_from_shdr
d2b2c203 5674
3b22753a 5675#define elf_backend_section_from_bfd_section \
351f65ca 5676 elf_x86_64_elf_section_from_bfd_section
3b22753a 5677#define elf_backend_add_symbol_hook \
351f65ca 5678 elf_x86_64_add_symbol_hook
3b22753a 5679#define elf_backend_symbol_processing \
351f65ca 5680 elf_x86_64_symbol_processing
3b22753a 5681#define elf_backend_common_section_index \
351f65ca 5682 elf_x86_64_common_section_index
3b22753a 5683#define elf_backend_common_section \
351f65ca 5684 elf_x86_64_common_section
3b22753a 5685#define elf_backend_common_definition \
351f65ca 5686 elf_x86_64_common_definition
3b22753a 5687#define elf_backend_merge_symbol \
351f65ca 5688 elf_x86_64_merge_symbol
3b22753a 5689#define elf_backend_special_sections \
351f65ca 5690 elf_x86_64_special_sections
3b22753a 5691#define elf_backend_additional_program_headers \
351f65ca 5692 elf_x86_64_additional_program_headers
fdc90cb4 5693#define elf_backend_hash_symbol \
351f65ca 5694 elf_x86_64_hash_symbol
3b22753a 5695
8d88c4ca 5696#include "elf64-target.h"
9d7cbccd
NC
5697
5698/* FreeBSD support. */
5699
5700#undef TARGET_LITTLE_SYM
6d00b590 5701#define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
9d7cbccd
NC
5702#undef TARGET_LITTLE_NAME
5703#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5704
d1036acb
L
5705#undef ELF_OSABI
5706#define ELF_OSABI ELFOSABI_FREEBSD
9d7cbccd 5707
9d7cbccd
NC
5708#undef elf64_bed
5709#define elf64_bed elf64_x86_64_fbsd_bed
5710
5711#include "elf64-target.h"
8a9036a4 5712
a6cc6b3b
RO
5713/* Solaris 2 support. */
5714
5715#undef TARGET_LITTLE_SYM
6d00b590 5716#define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
a6cc6b3b
RO
5717#undef TARGET_LITTLE_NAME
5718#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5719
5720/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5721 objects won't be recognized. */
5722#undef ELF_OSABI
5723
5724#undef elf64_bed
5725#define elf64_bed elf64_x86_64_sol2_bed
5726
7dc98aea
RO
5727/* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5728 boundary. */
5729#undef elf_backend_static_tls_alignment
5730#define elf_backend_static_tls_alignment 16
5731
a6cc6b3b
RO
5732/* The Solaris 2 ABI requires a plt symbol on all platforms.
5733
5734 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5735 File, p.63. */
5736#undef elf_backend_want_plt_sym
5737#define elf_backend_want_plt_sym 1
5738
5739#include "elf64-target.h"
5740
0ff2b86e
L
5741#undef bfd_elf64_get_synthetic_symtab
5742
8059fb19
RM
5743/* Native Client support. */
5744
64b384e1
RM
5745static bfd_boolean
5746elf64_x86_64_nacl_elf_object_p (bfd *abfd)
5747{
5748 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5749 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
5750 return TRUE;
5751}
5752
8059fb19 5753#undef TARGET_LITTLE_SYM
6d00b590 5754#define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
8059fb19
RM
5755#undef TARGET_LITTLE_NAME
5756#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5757#undef elf64_bed
5758#define elf64_bed elf64_x86_64_nacl_bed
5759
5760#undef ELF_MAXPAGESIZE
5761#undef ELF_MINPAGESIZE
5762#undef ELF_COMMONPAGESIZE
5763#define ELF_MAXPAGESIZE 0x10000
5764#define ELF_MINPAGESIZE 0x10000
5765#define ELF_COMMONPAGESIZE 0x10000
5766
5767/* Restore defaults. */
5768#undef ELF_OSABI
5769#undef elf_backend_static_tls_alignment
5770#undef elf_backend_want_plt_sym
5771#define elf_backend_want_plt_sym 0
5772
5773/* NaCl uses substantially different PLT entries for the same effects. */
5774
5775#undef elf_backend_plt_alignment
5776#define elf_backend_plt_alignment 5
5777#define NACL_PLT_ENTRY_SIZE 64
5778#define NACLMASK 0xe0 /* 32-byte alignment mask. */
5779
5780static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
5781 {
5782 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5783 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5784 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5785 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5786 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5787
ea2d813e 5788 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
70cc877f 5789 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
ea2d813e
RM
5790
5791 /* 32 bytes of nop to pad out to the standard size. */
8059fb19
RM
5792 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5793 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5794 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5795 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
ea2d813e
RM
5796 0x66, /* excess data32 prefix */
5797 0x90 /* nop */
8059fb19
RM
5798 };
5799
5800static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5801 {
5802 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5803 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5804 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5805 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5806
5807 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5808 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5809 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5810
5811 /* Lazy GOT entries point here (32-byte aligned). */
5812 0x68, /* pushq immediate */
5813 0, 0, 0, 0, /* replaced with index into relocation table. */
5814 0xe9, /* jmp relative */
5815 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5816
5817 /* 22 bytes of nop to pad out to the standard size. */
5818 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5819 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5820 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5821 };
5822
5823/* .eh_frame covering the .plt section. */
5824
5825static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
5826 {
5827#if (PLT_CIE_LENGTH != 20 \
5828 || PLT_FDE_LENGTH != 36 \
5829 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5830 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5831# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5832#endif
5833 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5834 0, 0, 0, 0, /* CIE ID */
5835 1, /* CIE version */
5836 'z', 'R', 0, /* Augmentation string */
5837 1, /* Code alignment factor */
5838 0x78, /* Data alignment factor */
5839 16, /* Return address column */
5840 1, /* Augmentation size */
5841 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5842 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5843 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5844 DW_CFA_nop, DW_CFA_nop,
5845
5846 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5847 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
5848 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5849 0, 0, 0, 0, /* .plt size goes here */
5850 0, /* Augmentation size */
5851 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
5852 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5853 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
5854 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5855 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5856 13, /* Block length */
5857 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
5858 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
5859 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5860 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
5861 DW_CFA_nop, DW_CFA_nop
5862 };
5863
5864static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
5865 {
5866 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
5867 elf_x86_64_nacl_plt_entry, /* plt_entry */
5868 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5869 2, /* plt0_got1_offset */
5870 9, /* plt0_got2_offset */
5871 13, /* plt0_got2_insn_end */
5872 3, /* plt_got_offset */
5873 33, /* plt_reloc_offset */
5874 38, /* plt_plt_offset */
5875 7, /* plt_got_insn_size */
5876 42, /* plt_plt_insn_end */
5877 32, /* plt_lazy_offset */
5878 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
5879 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
5880 };
5881
5882#undef elf_backend_arch_data
5883#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5884
64b384e1
RM
5885#undef elf_backend_object_p
5886#define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5a68afcf
RM
5887#undef elf_backend_modify_segment_map
5888#define elf_backend_modify_segment_map nacl_modify_segment_map
5889#undef elf_backend_modify_program_headers
5890#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM
5891#undef elf_backend_final_write_processing
5892#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 5893
8059fb19
RM
5894#include "elf64-target.h"
5895
5896/* Native Client x32 support. */
5897
64b384e1
RM
5898static bfd_boolean
5899elf32_x86_64_nacl_elf_object_p (bfd *abfd)
5900{
5901 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5902 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
5903 return TRUE;
5904}
5905
8059fb19 5906#undef TARGET_LITTLE_SYM
6d00b590 5907#define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
8059fb19
RM
5908#undef TARGET_LITTLE_NAME
5909#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5910#undef elf32_bed
5911#define elf32_bed elf32_x86_64_nacl_bed
5912
5913#define bfd_elf32_bfd_link_hash_table_create \
5914 elf_x86_64_link_hash_table_create
8059fb19
RM
5915#define bfd_elf32_bfd_reloc_type_lookup \
5916 elf_x86_64_reloc_type_lookup
5917#define bfd_elf32_bfd_reloc_name_lookup \
5918 elf_x86_64_reloc_name_lookup
5919#define bfd_elf32_mkobject \
5920 elf_x86_64_mkobject
5921
5922#undef elf_backend_object_p
5923#define elf_backend_object_p \
64b384e1 5924 elf32_x86_64_nacl_elf_object_p
8059fb19
RM
5925
5926#undef elf_backend_bfd_from_remote_memory
5927#define elf_backend_bfd_from_remote_memory \
5928 _bfd_elf32_bfd_from_remote_memory
5929
5930#undef elf_backend_size_info
5931#define elf_backend_size_info \
5932 _bfd_elf32_size_info
5933
5934#include "elf32-target.h"
5935
5936/* Restore defaults. */
5a68afcf 5937#undef elf_backend_object_p
8059fb19 5938#define elf_backend_object_p elf64_x86_64_elf_object_p
5a68afcf
RM
5939#undef elf_backend_bfd_from_remote_memory
5940#undef elf_backend_size_info
5941#undef elf_backend_modify_segment_map
5942#undef elf_backend_modify_program_headers
887badb3 5943#undef elf_backend_final_write_processing
8059fb19 5944
8a9036a4
L
5945/* Intel L1OM support. */
5946
5947static bfd_boolean
5948elf64_l1om_elf_object_p (bfd *abfd)
5949{
5950 /* Set the right machine number for an L1OM elf64 file. */
5951 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5952 return TRUE;
5953}
5954
5955#undef TARGET_LITTLE_SYM
6d00b590 5956#define TARGET_LITTLE_SYM l1om_elf64_vec
8a9036a4
L
5957#undef TARGET_LITTLE_NAME
5958#define TARGET_LITTLE_NAME "elf64-l1om"
5959#undef ELF_ARCH
5960#define ELF_ARCH bfd_arch_l1om
5961
5962#undef ELF_MACHINE_CODE
5963#define ELF_MACHINE_CODE EM_L1OM
5964
5965#undef ELF_OSABI
5966
5967#undef elf64_bed
5968#define elf64_bed elf64_l1om_bed
5969
5970#undef elf_backend_object_p
5971#define elf_backend_object_p elf64_l1om_elf_object_p
5972
8059fb19
RM
5973/* Restore defaults. */
5974#undef ELF_MAXPAGESIZE
5975#undef ELF_MINPAGESIZE
5976#undef ELF_COMMONPAGESIZE
5977#define ELF_MAXPAGESIZE 0x200000
5978#define ELF_MINPAGESIZE 0x1000
5979#define ELF_COMMONPAGESIZE 0x1000
5980#undef elf_backend_plt_alignment
5981#define elf_backend_plt_alignment 4
5982#undef elf_backend_arch_data
5983#define elf_backend_arch_data &elf_x86_64_arch_bed
1a0c107f 5984
8a9036a4
L
5985#include "elf64-target.h"
5986
5987/* FreeBSD L1OM support. */
5988
5989#undef TARGET_LITTLE_SYM
6d00b590 5990#define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
8a9036a4
L
5991#undef TARGET_LITTLE_NAME
5992#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5993
5994#undef ELF_OSABI
5995#define ELF_OSABI ELFOSABI_FREEBSD
5996
5997#undef elf64_bed
5998#define elf64_bed elf64_l1om_fbsd_bed
5999
8a9036a4 6000#include "elf64-target.h"
351f65ca 6001
7a9068fe
L
6002/* Intel K1OM support. */
6003
6004static bfd_boolean
6005elf64_k1om_elf_object_p (bfd *abfd)
6006{
6007 /* Set the right machine number for an K1OM elf64 file. */
6008 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
6009 return TRUE;
6010}
6011
6012#undef TARGET_LITTLE_SYM
6d00b590 6013#define TARGET_LITTLE_SYM k1om_elf64_vec
7a9068fe
L
6014#undef TARGET_LITTLE_NAME
6015#define TARGET_LITTLE_NAME "elf64-k1om"
6016#undef ELF_ARCH
6017#define ELF_ARCH bfd_arch_k1om
6018
6019#undef ELF_MACHINE_CODE
6020#define ELF_MACHINE_CODE EM_K1OM
6021
6022#undef ELF_OSABI
6023
6024#undef elf64_bed
6025#define elf64_bed elf64_k1om_bed
6026
6027#undef elf_backend_object_p
6028#define elf_backend_object_p elf64_k1om_elf_object_p
6029
6030#undef elf_backend_static_tls_alignment
6031
6032#undef elf_backend_want_plt_sym
6033#define elf_backend_want_plt_sym 0
6034
6035#include "elf64-target.h"
6036
6037/* FreeBSD K1OM support. */
6038
6039#undef TARGET_LITTLE_SYM
6d00b590 6040#define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
7a9068fe
L
6041#undef TARGET_LITTLE_NAME
6042#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6043
6044#undef ELF_OSABI
6045#define ELF_OSABI ELFOSABI_FREEBSD
6046
6047#undef elf64_bed
6048#define elf64_bed elf64_k1om_fbsd_bed
6049
6050#include "elf64-target.h"
6051
351f65ca
L
6052/* 32bit x86-64 support. */
6053
351f65ca 6054#undef TARGET_LITTLE_SYM
6d00b590 6055#define TARGET_LITTLE_SYM x86_64_elf32_vec
351f65ca
L
6056#undef TARGET_LITTLE_NAME
6057#define TARGET_LITTLE_NAME "elf32-x86-64"
8059fb19 6058#undef elf32_bed
351f65ca
L
6059
6060#undef ELF_ARCH
6061#define ELF_ARCH bfd_arch_i386
6062
6063#undef ELF_MACHINE_CODE
6064#define ELF_MACHINE_CODE EM_X86_64
6065
351f65ca
L
6066#undef ELF_OSABI
6067
351f65ca
L
6068#undef elf_backend_object_p
6069#define elf_backend_object_p \
6070 elf32_x86_64_elf_object_p
6071
6072#undef elf_backend_bfd_from_remote_memory
6073#define elf_backend_bfd_from_remote_memory \
6074 _bfd_elf32_bfd_from_remote_memory
6075
6076#undef elf_backend_size_info
6077#define elf_backend_size_info \
6078 _bfd_elf32_size_info
6079
6080#include "elf32-target.h"
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