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Enhance support for copying and stripping Solaris and ARM binaries.
[deliverable/binutils-gdb.git] / bfd / elf64-x86-64.c
CommitLineData
351f65ca 1/* X86-64 specific support for ELF
6f2750fe 2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
8d88c4ca
NC		 3 Contributed by Jan Hubicka <jh@suse.cz>.
4
ae9a127f 5 This file is part of BFD, the Binary File Descriptor library.
8d88c4ca 6
ae9a127f
NC		 7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
cd123cb7 9 the Free Software Foundation; either version 3 of the License, or
ae9a127f 10 (at your option) any later version.
8d88c4ca 11
ae9a127f
NC		 12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
8d88c4ca 16
ae9a127f
NC		 17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
cd123cb7
NC		 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
8d88c4ca 21
8d88c4ca 22#include "sysdep.h"
3db64b00 23#include "bfd.h"
c434dee6 24#include "bfdlink.h"
8d88c4ca
NC		 25#include "libbfd.h"
26#include "elf-bfd.h"
5a68afcf 27#include "elf-nacl.h"
142411ca 28#include "bfd_stdint.h"
c25bc9fc
L		 29#include "objalloc.h"
30#include "hashtab.h"
e41b3a13 31#include "dwarf2.h"
d7921315 32#include "libiberty.h"
8d88c4ca 33
56ceb5b5 34#include "opcode/i386.h"
8d88c4ca
NC		 35#include "elf/x86-64.h"
36
8fd79e71
L		 37#ifdef CORE_HEADER
38#include <stdarg.h>
39#include CORE_HEADER
40#endif
41
8d88c4ca
NC		 42/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
43#define MINUS_ONE (~ (bfd_vma) 0)
44
351f65ca
L		 45/* Since both 32-bit and 64-bit x86-64 encode relocation type in the
46 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
47 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
48 since they are the same. */
49
50#define ABI_64_P(abfd) \
51 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
52
8d88c4ca 53/* The relocation "howto" table. Order of fields:
7b81dfbb
AJ		 54 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
55 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
70256ad8
AJ		 56static reloc_howto_type x86_64_elf_howto_table[] =
57{
6346d5ca 58 HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
b34976b6
AM		 59 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
60 FALSE),
61 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
63 FALSE),
64 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
65 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
66 TRUE),
67 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
68 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
69 FALSE),
70 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
71 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
72 TRUE),
73 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
75 FALSE),
76 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
78 MINUS_ONE, FALSE),
79 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
81 MINUS_ONE, FALSE),
82 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
84 MINUS_ONE, FALSE),
85 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
86 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
87 0xffffffff, TRUE),
88 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
89 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
90 FALSE),
91 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
92 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
93 FALSE),
94 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
b0360d8c 96 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
b34976b6 97 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
ac2aa337 98 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
b34976b6
AM		 99 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
100 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
101 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
102 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
104 MINUS_ONE, FALSE),
105 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
107 MINUS_ONE, FALSE),
108 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
110 MINUS_ONE, FALSE),
111 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
112 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
113 0xffffffff, TRUE),
114 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
115 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
116 0xffffffff, TRUE),
ac2aa337 117 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
b34976b6
AM		 118 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
119 0xffffffff, FALSE),
120 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
121 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
122 0xffffffff, TRUE),
123 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
124 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
125 0xffffffff, FALSE),
d6ab8113
JB		 126 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
128 TRUE),
129 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
131 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
132 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
133 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
134 FALSE, 0xffffffff, 0xffffffff, TRUE),
7b81dfbb
AJ		 135 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
136 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
137 FALSE),
138 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
139 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
140 MINUS_ONE, TRUE),
141 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
142 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
143 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
144 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
145 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
146 MINUS_ONE, FALSE),
147 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
148 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
149 MINUS_ONE, FALSE),
1788fc08
L		 150 HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
151 bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
152 FALSE),
153 HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
154 bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
155 FALSE),
67a4f2b7
AO		 156 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
157 complain_overflow_bitfield, bfd_elf_generic_reloc,
158 "R_X86_64_GOTPC32_TLSDESC",
159 FALSE, 0xffffffff, 0xffffffff, TRUE),
160 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
161 complain_overflow_dont, bfd_elf_generic_reloc,
162 "R_X86_64_TLSDESC_CALL",
163 FALSE, 0, 0, FALSE),
164 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
165 complain_overflow_bitfield, bfd_elf_generic_reloc,
166 "R_X86_64_TLSDESC",
167 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
cbe950e9
L		 168 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
170 MINUS_ONE, FALSE),
64d25c44
L		 171 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
172 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
173 MINUS_ONE, FALSE),
c3320543
L		 174 HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
175 bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
176 TRUE),
177 HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
178 bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
179 TRUE),
56ceb5b5
L		 180 HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
181 bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff,
182 0xffffffff, TRUE),
183 HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
184 bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff,
185 0xffffffff, TRUE),
fe4770f4 186
a33d77bc
JB		 187 /* We have a gap in the reloc numbers here.
188 R_X86_64_standard counts the number up to this point, and
189 R_X86_64_vt_offset is the value to subtract from a reloc type of
190 R_X86_64_GNU_VT* to form an index into this table. */
56ceb5b5 191#define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
a33d77bc
JB		 192#define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
193
fe4770f4 194/* GNU extension to record C++ vtable hierarchy. */
b34976b6
AM		 195 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
196 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
fe4770f4
AJ		 197
198/* GNU extension to record C++ vtable member usage. */
b34976b6
AM		 199 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
200 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
d7921315
L		 201 FALSE),
202
203/* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
204 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
205 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
206 FALSE)
8d88c4ca
NC		 207};
208
d8045f23
NC		 209#define IS_X86_64_PCREL_TYPE(TYPE) \
210 ( ((TYPE) == R_X86_64_PC8) \
211 || ((TYPE) == R_X86_64_PC16) \
212 || ((TYPE) == R_X86_64_PC32) \
c3320543 213 || ((TYPE) == R_X86_64_PC32_BND) \
d8045f23
NC		 214 || ((TYPE) == R_X86_64_PC64))
215
8d88c4ca 216/* Map BFD relocs to the x86_64 elf relocs. */
70256ad8
AJ		 217struct elf_reloc_map
218{
8d88c4ca
NC		 219 bfd_reloc_code_real_type bfd_reloc_val;
220 unsigned char elf_reloc_val;
221};
222
dc810e39 223static const struct elf_reloc_map x86_64_reloc_map[] =
8d88c4ca 224{
70256ad8
AJ		 225 { BFD_RELOC_NONE, R_X86_64_NONE, },
226 { BFD_RELOC_64, R_X86_64_64, },
227 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
228 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
229 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
230 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
231 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
232 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
233 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
234 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
235 { BFD_RELOC_32, R_X86_64_32, },
236 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
237 { BFD_RELOC_16, R_X86_64_16, },
238 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
239 { BFD_RELOC_8, R_X86_64_8, },
240 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
bffbf940
JJ		 241 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
242 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
243 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
244 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
245 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
246 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
247 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
248 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
d6ab8113
JB		 249 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
250 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
251 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
7b81dfbb
AJ		 252 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
253 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
254 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
255 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
256 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
1788fc08
L		 257 { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
258 { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
67a4f2b7
AO		 259 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
260 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
261 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
cbe950e9 262 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
56ceb5b5
L		 263 { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, },
264 { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, },
265 { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, },
266 { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, },
fe4770f4
AJ		 267 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
268 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
8d88c4ca
NC		 269};
270
67a4f2b7 271static reloc_howto_type *
351f65ca 272elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
67a4f2b7
AO		 273{
274 unsigned i;
275
d7921315
L		 276 if (r_type == (unsigned int) R_X86_64_32)
277 {
278 if (ABI_64_P (abfd))
279 i = r_type;
280 else
281 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
282 }
283 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
284 || r_type >= (unsigned int) R_X86_64_max)
67a4f2b7
AO		 285 {
286 if (r_type >= (unsigned int) R_X86_64_standard)
287 {
288 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
289 abfd, (int) r_type);
290 r_type = R_X86_64_NONE;
291 }
292 i = r_type;
293 }
294 else
295 i = r_type - (unsigned int) R_X86_64_vt_offset;
296 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
297 return &x86_64_elf_howto_table[i];
298}
8d88c4ca
NC		 299
300/* Given a BFD reloc type, return a HOWTO structure. */
301static reloc_howto_type *
351f65ca
L		 302elf_x86_64_reloc_type_lookup (bfd *abfd,
303 bfd_reloc_code_real_type code)
8d88c4ca
NC		 304{
305 unsigned int i;
27482721 306
8d88c4ca
NC		 307 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
308 i++)
309 {
310 if (x86_64_reloc_map[i].bfd_reloc_val == code)
351f65ca
L		 311 return elf_x86_64_rtype_to_howto (abfd,
312 x86_64_reloc_map[i].elf_reloc_val);
8d88c4ca 313 }
5860e3f8 314 return NULL;
8d88c4ca
NC		 315}
316
157090f7 317static reloc_howto_type *
d7921315 318elf_x86_64_reloc_name_lookup (bfd *abfd,
351f65ca 319 const char *r_name)
157090f7
AM		 320{
321 unsigned int i;
322
d7921315
L		 323 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
324 {
325 /* Get x32 R_X86_64_32. */
326 reloc_howto_type *reloc
327 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
328 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
329 return reloc;
330 }
331
332 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
157090f7
AM		 333 if (x86_64_elf_howto_table[i].name != NULL
334 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
335 return &x86_64_elf_howto_table[i];
336
337 return NULL;
338}
339
8d88c4ca 340/* Given an x86_64 ELF reloc type, fill in an arelent structure. */
8da6118f 341
8d88c4ca 342static void
351f65ca
L		 343elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
344 Elf_Internal_Rela *dst)
8d88c4ca 345{
67a4f2b7 346 unsigned r_type;
8d88c4ca 347
351f65ca
L		 348 r_type = ELF32_R_TYPE (dst->r_info);
349 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
8d88c4ca
NC		 350 BFD_ASSERT (r_type == cache_ptr->howto->type);
351}
70256ad8 352\f
3bab7989 353/* Support for core dump NOTE sections. */
b34976b6 354static bfd_boolean
351f65ca 355elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 356{
357 int offset;
eea6121a 358 size_t size;
3bab7989
ML		 359
360 switch (note->descsz)
361 {
362 default:
b34976b6 363 return FALSE;
3bab7989 364
bcd823f1
L		 365 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
366 /* pr_cursig */
228e534f 367 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
bcd823f1
L		 368
369 /* pr_pid */
228e534f 370 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
bcd823f1
L		 371
372 /* pr_reg */
373 offset = 72;
374 size = 216;
375
376 break;
377
3bab7989
ML		 378 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
379 /* pr_cursig */
228e534f 380 elf_tdata (abfd)->core->signal
3bab7989
ML		 381 = bfd_get_16 (abfd, note->descdata + 12);
382
383 /* pr_pid */
228e534f 384 elf_tdata (abfd)->core->lwpid
3bab7989
ML		 385 = bfd_get_32 (abfd, note->descdata + 32);
386
387 /* pr_reg */
388 offset = 112;
eea6121a 389 size = 216;
3bab7989
ML		 390
391 break;
392 }
393
394 /* Make a ".reg/999" section. */
395 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 396 size, note->descpos + offset);
3bab7989
ML		 397}
398
b34976b6 399static bfd_boolean
351f65ca 400elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 401{
402 switch (note->descsz)
403 {
404 default:
b34976b6 405 return FALSE;
3bab7989 406
bcd823f1 407 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
228e534f 408 elf_tdata (abfd)->core->pid
bcd823f1 409 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 410 elf_tdata (abfd)->core->program
bcd823f1 411 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 412 elf_tdata (abfd)->core->command
bcd823f1
L		 413 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
414 break;
415
3bab7989 416 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
228e534f 417 elf_tdata (abfd)->core->pid
261b8d08 418 = bfd_get_32 (abfd, note->descdata + 24);
228e534f 419 elf_tdata (abfd)->core->program
3bab7989 420 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
228e534f 421 elf_tdata (abfd)->core->command
3bab7989
ML		 422 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
423 }
424
425 /* Note that for some reason, a spurious space is tacked
426 onto the end of the args in some (at least one anyway)
427 implementations, so strip it off if it exists. */
428
429 {
228e534f 430 char *command = elf_tdata (abfd)->core->command;
3bab7989
ML		 431 int n = strlen (command);
432
433 if (0 < n && command[n - 1] == ' ')
434 command[n - 1] = '\0';
435 }
436
b34976b6 437 return TRUE;
3bab7989 438}
8fd79e71
L		 439
440#ifdef CORE_HEADER
441static char *
442elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
443 int note_type, ...)
444{
445 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8fd79e71
L		 446 va_list ap;
447 const char *fname, *psargs;
448 long pid;
449 int cursig;
450 const void *gregs;
451
452 switch (note_type)
453 {
454 default:
455 return NULL;
456
457 case NT_PRPSINFO:
458 va_start (ap, note_type);
459 fname = va_arg (ap, const char *);
460 psargs = va_arg (ap, const char *);
461 va_end (ap);
462
463 if (bed->s->elfclass == ELFCLASS32)
464 {
465 prpsinfo32_t data;
466 memset (&data, 0, sizeof (data));
467 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
468 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK		 469 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
470 &data, sizeof (data));
8fd79e71
L		 471 }
472 else
473 {
b1bd052d 474 prpsinfo64_t data;
8fd79e71
L		 475 memset (&data, 0, sizeof (data));
476 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
477 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK		 478 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
479 &data, sizeof (data));
8fd79e71 480 }
e85c6a70 481 /* NOTREACHED */
8fd79e71
L		 482
483 case NT_PRSTATUS:
484 va_start (ap, note_type);
485 pid = va_arg (ap, long);
486 cursig = va_arg (ap, int);
487 gregs = va_arg (ap, const void *);
488 va_end (ap);
489
490 if (bed->s->elfclass == ELFCLASS32)
491 {
492 if (bed->elf_machine_code == EM_X86_64)
493 {
494 prstatusx32_t prstat;
495 memset (&prstat, 0, sizeof (prstat));
496 prstat.pr_pid = pid;
497 prstat.pr_cursig = cursig;
498 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 499 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
500 &prstat, sizeof (prstat));
8fd79e71
L		 501 }
502 else
503 {
504 prstatus32_t prstat;
505 memset (&prstat, 0, sizeof (prstat));
506 prstat.pr_pid = pid;
507 prstat.pr_cursig = cursig;
508 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 509 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
510 &prstat, sizeof (prstat));
8fd79e71
L		 511 }
512 }
513 else
514 {
b1bd052d 515 prstatus64_t prstat;
8fd79e71
L		 516 memset (&prstat, 0, sizeof (prstat));
517 prstat.pr_pid = pid;
518 prstat.pr_cursig = cursig;
519 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 520 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
521 &prstat, sizeof (prstat));
8fd79e71 522 }
8fd79e71 523 }
e85c6a70 524 /* NOTREACHED */
8fd79e71
L		 525}
526#endif
3bab7989 527\f
407443a3 528/* Functions for the x86-64 ELF linker. */
70256ad8 529
407443a3 530/* The name of the dynamic interpreter. This is put in the .interp
70256ad8
AJ		 531 section. */
532
351f65ca 533#define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
eec9dd95 534#define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
70256ad8 535
d40d037c
AJ		 536/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
537 copying dynamic variables from a shared lib into an app's dynbss
538 section, and instead use a dynamic relocation to point into the
539 shared lib. */
540#define ELIMINATE_COPY_RELOCS 1
541
70256ad8
AJ		 542/* The size in bytes of an entry in the global offset table. */
543
544#define GOT_ENTRY_SIZE 8
8d88c4ca 545
70256ad8 546/* The size in bytes of an entry in the procedure linkage table. */
8d88c4ca 547
70256ad8
AJ		 548#define PLT_ENTRY_SIZE 16
549
550/* The first entry in a procedure linkage table looks like this. See the
551 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
552
351f65ca 553static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
70256ad8 554{
653165cc
AJ		 555 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
556 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
10efb593 557 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
70256ad8
AJ		 558};
559
560/* Subsequent entries in a procedure linkage table look like this. */
561
351f65ca 562static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
70256ad8 563{
653165cc 564 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
407443a3 565 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653165cc 566 0x68, /* pushq immediate */
70256ad8
AJ		 567 0, 0, 0, 0, /* replaced with index into relocation table. */
568 0xe9, /* jmp relative */
569 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
570};
571
0ff2b86e
L		 572/* The first entry in a procedure linkage table with BND relocations
573 like this. */
574
575static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] =
576{
577 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
578 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
579 0x0f, 0x1f, 0 /* nopl (%rax) */
580};
581
582/* Subsequent entries for legacy branches in a procedure linkage table
583 with BND relocations look like this. */
584
585static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] =
586{
587 0x68, 0, 0, 0, 0, /* pushq immediate */
588 0xe9, 0, 0, 0, 0, /* jmpq relative */
589 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
590};
591
592/* Subsequent entries for branches with BND prefx in a procedure linkage
593 table with BND relocations look like this. */
594
595static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] =
596{
597 0x68, 0, 0, 0, 0, /* pushq immediate */
598 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
599 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
600};
601
602/* Entries for legacy branches in the second procedure linkage table
603 look like this. */
604
605static const bfd_byte elf_x86_64_legacy_plt2_entry[8] =
606{
607 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
608 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
610};
611
612/* Entries for branches with BND prefix in the second procedure linkage
613 table look like this. */
614
615static const bfd_byte elf_x86_64_bnd_plt2_entry[8] =
616{
617 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
618 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
619 0x90 /* nop */
620};
621
e41b3a13
JJ		 622/* .eh_frame covering the .plt section. */
623
624static const bfd_byte elf_x86_64_eh_frame_plt[] =
625{
626#define PLT_CIE_LENGTH 20
627#define PLT_FDE_LENGTH 36
628#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
629#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
630 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
631 0, 0, 0, 0, /* CIE ID */
632 1, /* CIE version */
633 'z', 'R', 0, /* Augmentation string */
634 1, /* Code alignment factor */
635 0x78, /* Data alignment factor */
636 16, /* Return address column */
637 1, /* Augmentation size */
638 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
639 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
640 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
641 DW_CFA_nop, DW_CFA_nop,
642
643 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
644 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
645 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
646 0, 0, 0, 0, /* .plt size goes here */
647 0, /* Augmentation size */
648 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
649 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
650 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
651 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
652 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
653 11, /* Block length */
654 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
655 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
656 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
657 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
658 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
659};
660
eed180f8
RM		 661/* Architecture-specific backend data for x86-64. */
662
663struct elf_x86_64_backend_data
664{
665 /* Templates for the initial PLT entry and for subsequent entries. */
666 const bfd_byte *plt0_entry;
667 const bfd_byte *plt_entry;
668 unsigned int plt_entry_size; /* Size of each PLT entry. */
669
670 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
671 unsigned int plt0_got1_offset;
672 unsigned int plt0_got2_offset;
673
674 /* Offset of the end of the PC-relative instruction containing
675 plt0_got2_offset. */
676 unsigned int plt0_got2_insn_end;
677
678 /* Offsets into plt_entry that are to be replaced with... */
679 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
680 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
681 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
682
683 /* Length of the PC-relative instruction containing plt_got_offset. */
684 unsigned int plt_got_insn_size;
685
686 /* Offset of the end of the PC-relative jump to plt0_entry. */
687 unsigned int plt_plt_insn_end;
688
689 /* Offset into plt_entry where the initial value of the GOT entry points. */
690 unsigned int plt_lazy_offset;
691
692 /* .eh_frame covering the .plt section. */
693 const bfd_byte *eh_frame_plt;
694 unsigned int eh_frame_plt_size;
695};
696
f8222080
L		 697#define get_elf_x86_64_arch_data(bed) \
698 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
699
eed180f8 700#define get_elf_x86_64_backend_data(abfd) \
f8222080 701 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
eed180f8
RM		 702
703#define GET_PLT_ENTRY_SIZE(abfd) \
704 get_elf_x86_64_backend_data (abfd)->plt_entry_size
705
706/* These are the standard parameters. */
707static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
708 {
709 elf_x86_64_plt0_entry, /* plt0_entry */
710 elf_x86_64_plt_entry, /* plt_entry */
711 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
712 2, /* plt0_got1_offset */
713 8, /* plt0_got2_offset */
714 12, /* plt0_got2_insn_end */
715 2, /* plt_got_offset */
716 7, /* plt_reloc_offset */
717 12, /* plt_plt_offset */
718 6, /* plt_got_insn_size */
719 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
720 6, /* plt_lazy_offset */
721 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
722 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
723 };
724
0ff2b86e
L		 725static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed =
726 {
727 elf_x86_64_bnd_plt0_entry, /* plt0_entry */
728 elf_x86_64_bnd_plt_entry, /* plt_entry */
729 sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */
730 2, /* plt0_got1_offset */
731 1+8, /* plt0_got2_offset */
732 1+12, /* plt0_got2_insn_end */
733 1+2, /* plt_got_offset */
734 1, /* plt_reloc_offset */
735 7, /* plt_plt_offset */
736 1+6, /* plt_got_insn_size */
737 11, /* plt_plt_insn_end */
738 0, /* plt_lazy_offset */
739 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
740 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
741 };
742
eed180f8
RM		 743#define elf_backend_arch_data &elf_x86_64_arch_bed
744
aec6b87e
L		 745/* Is a undefined weak symbol which is resolved to 0. Reference to an
746 undefined weak symbol is resolved to 0 when building executable if
747 it isn't dynamic and
748 1. Has non-GOT/non-PLT relocations in text section. Or
749 2. Has no GOT/PLT relocation.
750 */
751#define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \
752 ((EH)->elf.root.type == bfd_link_hash_undefweak \
753 && bfd_link_executable (INFO) \
754 && (elf_x86_64_hash_table (INFO)->interp == NULL \
755 || !(EH)->has_got_reloc \
756 || (EH)->has_non_got_reloc \
757 || !(INFO)->dynamic_undefined_weak))
758
70256ad8
AJ		 759/* x86-64 ELF linker hash entry. */
760
351f65ca 761struct elf_x86_64_link_hash_entry
70256ad8 762{
c434dee6 763 struct elf_link_hash_entry elf;
70256ad8 764
c434dee6 765 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 766 struct elf_dyn_relocs *dyn_relocs;
bffbf940
JJ		 767
768#define GOT_UNKNOWN 0
769#define GOT_NORMAL 1
770#define GOT_TLS_GD 2
771#define GOT_TLS_IE 3
67a4f2b7
AO		 772#define GOT_TLS_GDESC 4
773#define GOT_TLS_GD_BOTH_P(type) \
774 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
775#define GOT_TLS_GD_P(type) \
776 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
777#define GOT_TLS_GDESC_P(type) \
778 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
779#define GOT_TLS_GD_ANY_P(type) \
780 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
bffbf940 781 unsigned char tls_type;
67a4f2b7 782
bc696fd5
L		 783 /* TRUE if a weak symbol with a real definition needs a copy reloc.
784 When there is a weak symbol with a real definition, the processor
785 independent code will have arranged for us to see the real
786 definition first. We need to copy the needs_copy bit from the
787 real definition and check it when allowing copy reloc in PIE. */
788 unsigned int needs_copy : 1;
789
0ff2b86e 790 /* TRUE if symbol has at least one BND relocation. */
bc696fd5 791 unsigned int has_bnd_reloc : 1;
0ff2b86e 792
aec6b87e
L		 793 /* TRUE if symbol has GOT or PLT relocations. */
794 unsigned int has_got_reloc : 1;
795
796 /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */
797 unsigned int has_non_got_reloc : 1;
798
04ebc307
L		 799 /* Reference count of C/C++ function pointer relocations in read-write
800 section which can be resolved at run-time. */
801 bfd_signed_vma func_pointer_refcount;
802
dd7e64d4
L		 803 /* Information about the GOT PLT entry. Filled when there are both
804 GOT and PLT relocations against the same function. */
805 union gotplt_union plt_got;
806
0ff2b86e
L		 807 /* Information about the second PLT entry. Filled when has_bnd_reloc is
808 set. */
809 union gotplt_union plt_bnd;
810
67a4f2b7
AO		 811 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
812 starting at the end of the jump table. */
813 bfd_vma tlsdesc_got;
bffbf940
JJ		 814};
815
351f65ca
L		 816#define elf_x86_64_hash_entry(ent) \
817 ((struct elf_x86_64_link_hash_entry *)(ent))
bffbf940 818
351f65ca 819struct elf_x86_64_obj_tdata
bffbf940
JJ		 820{
821 struct elf_obj_tdata root;
822
823 /* tls_type for each local got entry. */
824 char *local_got_tls_type;
67a4f2b7
AO		 825
826 /* GOTPLT entries for TLS descriptors. */
827 bfd_vma *local_tlsdesc_gotent;
70256ad8
AJ		 828};
829
351f65ca
L		 830#define elf_x86_64_tdata(abfd) \
831 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
bffbf940 832
351f65ca
L		 833#define elf_x86_64_local_got_tls_type(abfd) \
834 (elf_x86_64_tdata (abfd)->local_got_tls_type)
bffbf940 835
351f65ca
L		 836#define elf_x86_64_local_tlsdesc_gotent(abfd) \
837 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
bffbf940 838
0ffa91dd
NC		 839#define is_x86_64_elf(bfd) \
840 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
841 && elf_tdata (bfd) != NULL \
4dfe6ac6 842 && elf_object_id (bfd) == X86_64_ELF_DATA)
0ffa91dd
NC		 843
844static bfd_boolean
351f65ca 845elf_x86_64_mkobject (bfd *abfd)
0ffa91dd 846{
351f65ca 847 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
4dfe6ac6 848 X86_64_ELF_DATA);
0ffa91dd
NC		 849}
850
c434dee6 851/* x86-64 ELF linker hash table. */
8d88c4ca 852
351f65ca 853struct elf_x86_64_link_hash_table
407443a3 854{
c434dee6 855 struct elf_link_hash_table elf;
70256ad8 856
c434dee6 857 /* Short-cuts to get to dynamic linker sections. */
aec6b87e 858 asection *interp;
c434dee6
AJ		 859 asection *sdynbss;
860 asection *srelbss;
e41b3a13 861 asection *plt_eh_frame;
0ff2b86e 862 asection *plt_bnd;
dd7e64d4 863 asection *plt_got;
70256ad8 864
4dfe6ac6
NC		 865 union
866 {
bffbf940
JJ		 867 bfd_signed_vma refcount;
868 bfd_vma offset;
869 } tls_ld_got;
870
67a4f2b7
AO		 871 /* The amount of space used by the jump slots in the GOT. */
872 bfd_vma sgotplt_jump_table_size;
873
87d72d41
AM		 874 /* Small local sym cache. */
875 struct sym_cache sym_cache;
9f03412a 876
351f65ca
L		 877 bfd_vma (*r_info) (bfd_vma, bfd_vma);
878 bfd_vma (*r_sym) (bfd_vma);
248775ba 879 unsigned int pointer_r_type;
351f65ca
L		 880 const char *dynamic_interpreter;
881 int dynamic_interpreter_size;
882
9f03412a
AO		 883 /* _TLS_MODULE_BASE_ symbol. */
884 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L		 885
886 /* Used by local STT_GNU_IFUNC symbols. */
887 htab_t loc_hash_table;
4dfe6ac6
NC		 888 void * loc_hash_memory;
889
890 /* The offset into splt of the PLT entry for the TLS descriptor
891 resolver. Special values are 0, if not necessary (or not found
892 to be necessary yet), and -1 if needed but not determined
893 yet. */
894 bfd_vma tlsdesc_plt;
895 /* The offset into sgot of the GOT entry used by the PLT entry
896 above. */
897 bfd_vma tlsdesc_got;
e1f98742
L		 898
899 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
900 bfd_vma next_jump_slot_index;
901 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
902 bfd_vma next_irelative_index;
2df3368d
L		 903
904 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
905 to read-only sections. */
906 bfd_boolean readonly_dynrelocs_against_ifunc;
c434dee6 907};
70256ad8
AJ		 908
909/* Get the x86-64 ELF linker hash table from a link_info structure. */
8d88c4ca 910
351f65ca 911#define elf_x86_64_hash_table(p) \
4dfe6ac6 912 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
351f65ca 913 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
8d88c4ca 914
351f65ca 915#define elf_x86_64_compute_jump_table_size(htab) \
6de2ae4a 916 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
67a4f2b7 917
407443a3 918/* Create an entry in an x86-64 ELF linker hash table. */
70256ad8
AJ		 919
920static struct bfd_hash_entry *
351f65ca
L		 921elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
922 struct bfd_hash_table *table,
923 const char *string)
70256ad8 924{
70256ad8 925 /* Allocate the structure if it has not already been allocated by a
c434dee6
AJ		 926 subclass. */
927 if (entry == NULL)
928 {
a50b1753 929 entry = (struct bfd_hash_entry *)
eed180f8
RM		 930 bfd_hash_allocate (table,
931 sizeof (struct elf_x86_64_link_hash_entry));
c434dee6
AJ		 932 if (entry == NULL)
933 return entry;
934 }
70256ad8
AJ		 935
936 /* Call the allocation method of the superclass. */
c434dee6
AJ		 937 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
938 if (entry != NULL)
70256ad8 939 {
351f65ca 940 struct elf_x86_64_link_hash_entry *eh;
c434dee6 941
351f65ca 942 eh = (struct elf_x86_64_link_hash_entry *) entry;
c434dee6 943 eh->dyn_relocs = NULL;
bffbf940 944 eh->tls_type = GOT_UNKNOWN;
bc696fd5
L		 945 eh->needs_copy = 0;
946 eh->has_bnd_reloc = 0;
aec6b87e
L		 947 eh->has_got_reloc = 0;
948 eh->has_non_got_reloc = 0;
04ebc307 949 eh->func_pointer_refcount = 0;
0ff2b86e 950 eh->plt_bnd.offset = (bfd_vma) -1;
dd7e64d4 951 eh->plt_got.offset = (bfd_vma) -1;
67a4f2b7 952 eh->tlsdesc_got = (bfd_vma) -1;
70256ad8
AJ		 953 }
954
c434dee6 955 return entry;
70256ad8
AJ		 956}
957
c25bc9fc
L		 958/* Compute a hash of a local hash entry. We use elf_link_hash_entry
959 for local symbol so that we can handle local STT_GNU_IFUNC symbols
960 as global symbol. We reuse indx and dynstr_index for local symbol
961 hash since they aren't used by global symbols in this backend. */
962
963static hashval_t
351f65ca 964elf_x86_64_local_htab_hash (const void *ptr)
c25bc9fc
L		 965{
966 struct elf_link_hash_entry *h
967 = (struct elf_link_hash_entry *) ptr;
d2149d72 968 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L		 969}
970
971/* Compare local hash entries. */
972
973static int
351f65ca 974elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
c25bc9fc
L		 975{
976 struct elf_link_hash_entry *h1
977 = (struct elf_link_hash_entry *) ptr1;
978 struct elf_link_hash_entry *h2
979 = (struct elf_link_hash_entry *) ptr2;
980
981 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
982}
983
984/* Find and/or create a hash entry for local symbol. */
985
986static struct elf_link_hash_entry *
351f65ca
L		 987elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
988 bfd *abfd, const Elf_Internal_Rela *rel,
989 bfd_boolean create)
c25bc9fc 990{
351f65ca 991 struct elf_x86_64_link_hash_entry e, *ret;
c25bc9fc 992 asection *sec = abfd->sections;
d2149d72 993 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
351f65ca 994 htab->r_sym (rel->r_info));
c25bc9fc
L		 995 void **slot;
996
997 e.elf.indx = sec->id;
351f65ca 998 e.elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc
L		 999 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
1000 create ? INSERT : NO_INSERT);
1001
1002 if (!slot)
1003 return NULL;
1004
1005 if (*slot)
1006 {
351f65ca 1007 ret = (struct elf_x86_64_link_hash_entry *) *slot;
c25bc9fc
L		 1008 return &ret->elf;
1009 }
1010
351f65ca 1011 ret = (struct elf_x86_64_link_hash_entry *)
c25bc9fc 1012 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
351f65ca 1013 sizeof (struct elf_x86_64_link_hash_entry));
c25bc9fc
L		 1014 if (ret)
1015 {
1016 memset (ret, 0, sizeof (*ret));
1017 ret->elf.indx = sec->id;
351f65ca 1018 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc 1019 ret->elf.dynindx = -1;
04ebc307 1020 ret->func_pointer_refcount = 0;
dd7e64d4 1021 ret->plt_got.offset = (bfd_vma) -1;
c25bc9fc
L		 1022 *slot = ret;
1023 }
1024 return &ret->elf;
1025}
1026
68faa637
AM		 1027/* Destroy an X86-64 ELF linker hash table. */
1028
1029static void
d495ab0d 1030elf_x86_64_link_hash_table_free (bfd *obfd)
68faa637
AM		 1031{
1032 struct elf_x86_64_link_hash_table *htab
d495ab0d 1033 = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
68faa637
AM		 1034
1035 if (htab->loc_hash_table)
1036 htab_delete (htab->loc_hash_table);
1037 if (htab->loc_hash_memory)
1038 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
d495ab0d 1039 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 1040}
1041
8d88c4ca
NC		 1042/* Create an X86-64 ELF linker hash table. */
1043
1044static struct bfd_link_hash_table *
351f65ca 1045elf_x86_64_link_hash_table_create (bfd *abfd)
8d88c4ca 1046{
351f65ca
L		 1047 struct elf_x86_64_link_hash_table *ret;
1048 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
8d88c4ca 1049
7bf52ea2 1050 ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
c434dee6 1051 if (ret == NULL)
8d88c4ca
NC		 1052 return NULL;
1053
eb4ff4d6 1054 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
351f65ca
L		 1055 elf_x86_64_link_hash_newfunc,
1056 sizeof (struct elf_x86_64_link_hash_entry),
4dfe6ac6 1057 X86_64_ELF_DATA))
8d88c4ca 1058 {
e2d34d7d 1059 free (ret);
8d88c4ca
NC		 1060 return NULL;
1061 }
1062
351f65ca
L		 1063 if (ABI_64_P (abfd))
1064 {
1065 ret->r_info = elf64_r_info;
1066 ret->r_sym = elf64_r_sym;
248775ba 1067 ret->pointer_r_type = R_X86_64_64;
351f65ca
L		 1068 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1069 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1070 }
1071 else
1072 {
1073 ret->r_info = elf32_r_info;
1074 ret->r_sym = elf32_r_sym;
248775ba 1075 ret->pointer_r_type = R_X86_64_32;
351f65ca
L		 1076 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1077 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1078 }
1079
c25bc9fc 1080 ret->loc_hash_table = htab_try_create (1024,
351f65ca
L		 1081 elf_x86_64_local_htab_hash,
1082 elf_x86_64_local_htab_eq,
c25bc9fc
L		 1083 NULL);
1084 ret->loc_hash_memory = objalloc_create ();
1085 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1086 {
d495ab0d 1087 elf_x86_64_link_hash_table_free (abfd);
c25bc9fc
L		 1088 return NULL;
1089 }
d495ab0d 1090 ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
c25bc9fc 1091
c434dee6
AJ		 1092 return &ret->elf.root;
1093}
1094
c434dee6
AJ		 1095/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1096 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1097 hash table. */
1098
b34976b6 1099static bfd_boolean
351f65ca
L		 1100elf_x86_64_create_dynamic_sections (bfd *dynobj,
1101 struct bfd_link_info *info)
c434dee6 1102{
351f65ca 1103 struct elf_x86_64_link_hash_table *htab;
c434dee6 1104
c434dee6 1105 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 1106 return FALSE;
c434dee6 1107
351f65ca 1108 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1109 if (htab == NULL)
1110 return FALSE;
1111
3d4d4302 1112 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
9a926d55 1113 if (!htab->sdynbss)
c434dee6
AJ		 1114 abort ();
1115
0e1862bb 1116 if (bfd_link_executable (info))
9a926d55
L		 1117 {
1118 /* Always allow copy relocs for building executables. */
9d157cb9 1119 asection *s = bfd_get_linker_section (dynobj, ".rela.bss");
9a926d55
L		 1120 if (s == NULL)
1121 {
1122 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1123 s = bfd_make_section_anyway_with_flags (dynobj,
1124 ".rela.bss",
1125 (bed->dynamic_sec_flags
1126 | SEC_READONLY));
1127 if (s == NULL
1128 || ! bfd_set_section_alignment (dynobj, s,
1129 bed->s->log_file_align))
1130 return FALSE;
1131 }
1132 htab->srelbss = s;
1133 }
1134
e41b3a13 1135 if (!info->no_ld_generated_unwind_info
2fe0fd06 1136 && htab->plt_eh_frame == NULL
e4de50d4 1137 && htab->elf.splt != NULL)
e41b3a13 1138 {
bbf96e4e
L		 1139 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1140 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1141 | SEC_LINKER_CREATED);
e41b3a13 1142 htab->plt_eh_frame
bbf96e4e 1143 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ		 1144 if (htab->plt_eh_frame == NULL
1145 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
1146 return FALSE;
e41b3a13 1147 }
b34976b6 1148 return TRUE;
c434dee6
AJ		 1149}
1150
1151/* Copy the extra info we tack onto an elf_link_hash_entry. */
1152
1153static void
351f65ca
L		 1154elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1155 struct elf_link_hash_entry *dir,
1156 struct elf_link_hash_entry *ind)
c434dee6 1157{
351f65ca 1158 struct elf_x86_64_link_hash_entry *edir, *eind;
c434dee6 1159
351f65ca
L		 1160 edir = (struct elf_x86_64_link_hash_entry *) dir;
1161 eind = (struct elf_x86_64_link_hash_entry *) ind;
c434dee6 1162
0ff2b86e
L		 1163 if (!edir->has_bnd_reloc)
1164 edir->has_bnd_reloc = eind->has_bnd_reloc;
1165
aec6b87e
L		 1166 if (!edir->has_got_reloc)
1167 edir->has_got_reloc = eind->has_got_reloc;
1168
1169 if (!edir->has_non_got_reloc)
1170 edir->has_non_got_reloc = eind->has_non_got_reloc;
1171
c434dee6
AJ		 1172 if (eind->dyn_relocs != NULL)
1173 {
1174 if (edir->dyn_relocs != NULL)
1175 {
e03a8ed8
L		 1176 struct elf_dyn_relocs **pp;
1177 struct elf_dyn_relocs *p;
c434dee6 1178
fcfa13d2 1179 /* Add reloc counts against the indirect sym to the direct sym
c434dee6
AJ		 1180 list. Merge any entries against the same section. */
1181 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1182 {
e03a8ed8 1183 struct elf_dyn_relocs *q;
c434dee6
AJ		 1184
1185 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1186 if (q->sec == p->sec)
1187 {
1188 q->pc_count += p->pc_count;
1189 q->count += p->count;
1190 *pp = p->next;
1191 break;
1192 }
1193 if (q == NULL)
1194 pp = &p->next;
1195 }
1196 *pp = edir->dyn_relocs;
1197 }
1198
1199 edir->dyn_relocs = eind->dyn_relocs;
1200 eind->dyn_relocs = NULL;
1201 }
1202
bffbf940
JJ		 1203 if (ind->root.type == bfd_link_hash_indirect
1204 && dir->got.refcount <= 0)
1205 {
1206 edir->tls_type = eind->tls_type;
1207 eind->tls_type = GOT_UNKNOWN;
1208 }
1209
d40d037c
AJ		 1210 if (ELIMINATE_COPY_RELOCS
1211 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 1212 && dir->dynamic_adjusted)
1213 {
1214 /* If called to transfer flags for a weakdef during processing
1215 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1216 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1217 dir->ref_dynamic |= ind->ref_dynamic;
1218 dir->ref_regular |= ind->ref_regular;
1219 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1220 dir->needs_plt |= ind->needs_plt;
1221 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1222 }
d40d037c 1223 else
04ebc307
L		 1224 {
1225 if (eind->func_pointer_refcount > 0)
1226 {
1227 edir->func_pointer_refcount += eind->func_pointer_refcount;
1228 eind->func_pointer_refcount = 0;
1229 }
1230
1231 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1232 }
8d88c4ca
NC		 1233}
1234
b34976b6 1235static bfd_boolean
27482721 1236elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940 1237{
8d88c4ca
NC		 1238 /* Set the right machine number for an x86-64 elf64 file. */
1239 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 1240 return TRUE;
8d88c4ca
NC		 1241}
1242
8059fb19
RM		 1243static bfd_boolean
1244elf32_x86_64_elf_object_p (bfd *abfd)
1245{
1246 /* Set the right machine number for an x86-64 elf32 file. */
1247 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1248 return TRUE;
1249}
1250
142411ca
L		 1251/* Return TRUE if the TLS access code sequence support transition
1252 from R_TYPE. */
1253
1254static bfd_boolean
351f65ca
L		 1255elf_x86_64_check_tls_transition (bfd *abfd,
1256 struct bfd_link_info *info,
1257 asection *sec,
1258 bfd_byte *contents,
1259 Elf_Internal_Shdr *symtab_hdr,
1260 struct elf_link_hash_entry **sym_hashes,
1261 unsigned int r_type,
1262 const Elf_Internal_Rela *rel,
1263 const Elf_Internal_Rela *relend)
bffbf940 1264{
142411ca
L		 1265 unsigned int val;
1266 unsigned long r_symndx;
5c98a14e 1267 bfd_boolean largepic = FALSE;
142411ca
L		 1268 struct elf_link_hash_entry *h;
1269 bfd_vma offset;
351f65ca 1270 struct elf_x86_64_link_hash_table *htab;
142411ca
L		 1271
1272 /* Get the section contents. */
1273 if (contents == NULL)
1274 {
1275 if (elf_section_data (sec)->this_hdr.contents != NULL)
1276 contents = elf_section_data (sec)->this_hdr.contents;
1277 else
1278 {
1279 /* FIXME: How to better handle error condition? */
1280 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1281 return FALSE;
bffbf940 1282
142411ca
L		 1283 /* Cache the section contents for elf_link_input_bfd. */
1284 elf_section_data (sec)->this_hdr.contents = contents;
1285 }
1286 }
1287
351f65ca 1288 htab = elf_x86_64_hash_table (info);
142411ca 1289 offset = rel->r_offset;
bffbf940 1290 switch (r_type)
142411ca
L		 1291 {
1292 case R_X86_64_TLSGD:
1293 case R_X86_64_TLSLD:
1294 if ((rel + 1) >= relend)
1295 return FALSE;
1296
1297 if (r_type == R_X86_64_TLSGD)
1298 {
52bc799a 1299 /* Check transition from GD access model. For 64bit, only
142411ca
L		 1300 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1301 .word 0x6666; rex64; call __tls_get_addr
52bc799a
L		 1302 can transit to different access model. For 32bit, only
1303 leaq foo@tlsgd(%rip), %rdi
1304 .word 0x6666; rex64; call __tls_get_addr
5c98a14e
JJ		 1305 can transit to different access model. For largepic
1306 we also support:
1307 leaq foo@tlsgd(%rip), %rdi
1308 movabsq $__tls_get_addr@pltoff, %rax
1309 addq $rbx, %rax
1310 call *%rax. */
142411ca 1311
fa289a5f
AM		 1312 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1313 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1314
5c98a14e 1315 if ((offset + 12) > sec->size)
142411ca 1316 return FALSE;
52bc799a 1317
5c98a14e
JJ		 1318 if (memcmp (contents + offset + 4, call, 4) != 0)
1319 {
1320 if (!ABI_64_P (abfd)
1321 || (offset + 19) > sec->size
1322 || offset < 3
1323 || memcmp (contents + offset - 3, leaq + 1, 3) != 0
1324 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1325 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1326 != 0)
1327 return FALSE;
1328 largepic = TRUE;
1329 }
1330 else if (ABI_64_P (abfd))
52bc799a 1331 {
52bc799a 1332 if (offset < 4
fa289a5f 1333 || memcmp (contents + offset - 4, leaq, 4) != 0)
52bc799a
L		 1334 return FALSE;
1335 }
1336 else
1337 {
52bc799a 1338 if (offset < 3
fa289a5f 1339 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
52bc799a
L		 1340 return FALSE;
1341 }
142411ca
L		 1342 }
1343 else
1344 {
1345 /* Check transition from LD access model. Only
1346 leaq foo@tlsld(%rip), %rdi;
1347 call __tls_get_addr
5c98a14e
JJ		 1348 can transit to different access model. For largepic
1349 we also support:
1350 leaq foo@tlsld(%rip), %rdi
1351 movabsq $__tls_get_addr@pltoff, %rax
1352 addq $rbx, %rax
1353 call *%rax. */
142411ca 1354
fa289a5f 1355 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
142411ca
L		 1356
1357 if (offset < 3 || (offset + 9) > sec->size)
1358 return FALSE;
1359
5c98a14e 1360 if (memcmp (contents + offset - 3, lea, 3) != 0)
142411ca 1361 return FALSE;
5c98a14e
JJ		 1362
1363 if (0xe8 != *(contents + offset + 4))
1364 {
1365 if (!ABI_64_P (abfd)
1366 || (offset + 19) > sec->size
1367 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1368 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1369 != 0)
1370 return FALSE;
1371 largepic = TRUE;
1372 }
142411ca
L		 1373 }
1374
351f65ca 1375 r_symndx = htab->r_sym (rel[1].r_info);
142411ca
L		 1376 if (r_symndx < symtab_hdr->sh_info)
1377 return FALSE;
1378
1379 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b 1380 /* Use strncmp to check __tls_get_addr since __tls_get_addr
eed180f8 1381 may be versioned. */
142411ca
L		 1382 return (h != NULL
1383 && h->root.root.string != NULL
5c98a14e
JJ		 1384 && (largepic
1385 ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64
1386 : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1387 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32))
c4fb387b
L		 1388 && (strncmp (h->root.root.string,
1389 "__tls_get_addr", 14) == 0));
142411ca
L		 1390
1391 case R_X86_64_GOTTPOFF:
1392 /* Check transition from IE access model:
4a4c5f25
L		 1393 mov foo@gottpoff(%rip), %reg
1394 add foo@gottpoff(%rip), %reg
142411ca
L		 1395 */
1396
4a4c5f25
L		 1397 /* Check REX prefix first. */
1398 if (offset >= 3 && (offset + 4) <= sec->size)
1399 {
1400 val = bfd_get_8 (abfd, contents + offset - 3);
1401 if (val != 0x48 && val != 0x4c)
1402 {
1403 /* X32 may have 0x44 REX prefix or no REX prefix. */
1404 if (ABI_64_P (abfd))
1405 return FALSE;
1406 }
1407 }
1408 else
1409 {
1410 /* X32 may not have any REX prefix. */
1411 if (ABI_64_P (abfd))
1412 return FALSE;
1413 if (offset < 2 || (offset + 3) > sec->size)
1414 return FALSE;
1415 }
142411ca
L		 1416
1417 val = bfd_get_8 (abfd, contents + offset - 2);
1418 if (val != 0x8b && val != 0x03)
1419 return FALSE;
1420
1421 val = bfd_get_8 (abfd, contents + offset - 1);
1422 return (val & 0xc7) == 5;
1423
1424 case R_X86_64_GOTPC32_TLSDESC:
1425 /* Check transition from GDesc access model:
1426 leaq x@tlsdesc(%rip), %rax
1427
1428 Make sure it's a leaq adding rip to a 32-bit offset
1429 into any register, although it's probably almost always
1430 going to be rax. */
1431
1432 if (offset < 3 || (offset + 4) > sec->size)
1433 return FALSE;
1434
1435 val = bfd_get_8 (abfd, contents + offset - 3);
1436 if ((val & 0xfb) != 0x48)
1437 return FALSE;
1438
1439 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1440 return FALSE;
1441
1442 val = bfd_get_8 (abfd, contents + offset - 1);
1443 return (val & 0xc7) == 0x05;
1444
1445 case R_X86_64_TLSDESC_CALL:
1446 /* Check transition from GDesc access model:
1447 call *x@tlsdesc(%rax)
1448 */
1449 if (offset + 2 <= sec->size)
1450 {
1451 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM		 1452 static const unsigned char call[] = { 0xff, 0x10 };
1453 return memcmp (contents + offset, call, 2) == 0;
142411ca
L		 1454 }
1455
1456 return FALSE;
1457
1458 default:
1459 abort ();
1460 }
1461}
1462
1463/* Return TRUE if the TLS access transition is OK or no transition
1464 will be performed. Update R_TYPE if there is a transition. */
1465
1466static bfd_boolean
351f65ca
L		 1467elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1468 asection *sec, bfd_byte *contents,
1469 Elf_Internal_Shdr *symtab_hdr,
1470 struct elf_link_hash_entry **sym_hashes,
1471 unsigned int *r_type, int tls_type,
1472 const Elf_Internal_Rela *rel,
1473 const Elf_Internal_Rela *relend,
1474 struct elf_link_hash_entry *h,
1475 unsigned long r_symndx)
142411ca
L		 1476{
1477 unsigned int from_type = *r_type;
1478 unsigned int to_type = from_type;
1479 bfd_boolean check = TRUE;
1480
bb1cb422
L		 1481 /* Skip TLS transition for functions. */
1482 if (h != NULL
1483 && (h->type == STT_FUNC
1484 || h->type == STT_GNU_IFUNC))
1485 return TRUE;
1486
142411ca 1487 switch (from_type)
bffbf940
JJ		 1488 {
1489 case R_X86_64_TLSGD:
67a4f2b7
AO		 1490 case R_X86_64_GOTPC32_TLSDESC:
1491 case R_X86_64_TLSDESC_CALL:
bffbf940 1492 case R_X86_64_GOTTPOFF:
0e1862bb 1493 if (bfd_link_executable (info))
142411ca
L		 1494 {
1495 if (h == NULL)
1496 to_type = R_X86_64_TPOFF32;
1497 else
1498 to_type = R_X86_64_GOTTPOFF;
1499 }
1500
351f65ca 1501 /* When we are called from elf_x86_64_relocate_section,
142411ca
L		 1502 CONTENTS isn't NULL and there may be additional transitions
1503 based on TLS_TYPE. */
1504 if (contents != NULL)
1505 {
1506 unsigned int new_to_type = to_type;
1507
0e1862bb 1508 if (bfd_link_executable (info)
142411ca
L		 1509 && h != NULL
1510 && h->dynindx == -1
1511 && tls_type == GOT_TLS_IE)
1512 new_to_type = R_X86_64_TPOFF32;
1513
1514 if (to_type == R_X86_64_TLSGD
1515 || to_type == R_X86_64_GOTPC32_TLSDESC
1516 || to_type == R_X86_64_TLSDESC_CALL)
1517 {
1518 if (tls_type == GOT_TLS_IE)
1519 new_to_type = R_X86_64_GOTTPOFF;
1520 }
1521
1522 /* We checked the transition before when we were called from
351f65ca 1523 elf_x86_64_check_relocs. We only want to check the new
142411ca
L		 1524 transition which hasn't been checked before. */
1525 check = new_to_type != to_type && from_type == to_type;
1526 to_type = new_to_type;
1527 }
1528
1529 break;
1530
bffbf940 1531 case R_X86_64_TLSLD:
0e1862bb 1532 if (bfd_link_executable (info))
142411ca
L		 1533 to_type = R_X86_64_TPOFF32;
1534 break;
1535
1536 default:
1537 return TRUE;
bffbf940
JJ		 1538 }
1539
142411ca
L		 1540 /* Return TRUE if there is no transition. */
1541 if (from_type == to_type)
1542 return TRUE;
1543
1544 /* Check if the transition can be performed. */
1545 if (check
351f65ca
L		 1546 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1547 symtab_hdr, sym_hashes,
1548 from_type, rel, relend))
142411ca 1549 {
2f629d23 1550 reloc_howto_type *from, *to;
4c544807 1551 const char *name;
142411ca 1552
351f65ca
L		 1553 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1554 to = elf_x86_64_rtype_to_howto (abfd, to_type);
142411ca 1555
4c544807
L		 1556 if (h)
1557 name = h->root.root.string;
1558 else
1559 {
351f65ca 1560 struct elf_x86_64_link_hash_table *htab;
4dfe6ac6 1561
351f65ca 1562 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1563 if (htab == NULL)
1564 name = "*unknown*";
1565 else
1566 {
1567 Elf_Internal_Sym *isym;
1568
1569 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1570 abfd, r_symndx);
1571 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1572 }
4c544807
L		 1573 }
1574
142411ca
L		 1575 (*_bfd_error_handler)
1576 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1577 "in section `%A' failed"),
4c544807 1578 abfd, sec, from->name, to->name, name,
142411ca
L		 1579 (unsigned long) rel->r_offset);
1580 bfd_set_error (bfd_error_bad_value);
1581 return FALSE;
1582 }
1583
1584 *r_type = to_type;
1585 return TRUE;
bffbf940
JJ		 1586}
1587
c1d11331
L		 1588/* Rename some of the generic section flags to better document how they
1589 are used here. */
338c190a
L		 1590#define need_convert_load sec_flg0
1591#define check_relocs_failed sec_flg1
1592
1593static bfd_boolean
1594elf_x86_64_need_pic (bfd *input_bfd, asection *sec,
1595 struct elf_link_hash_entry *h,
1596 Elf_Internal_Shdr *symtab_hdr,
1597 Elf_Internal_Sym *isym,
1598 reloc_howto_type *howto)
1599{
1600 const char *v = "";
1601 const char *und = "";
1602 const char *pic = "";
1603
1604 const char *name;
1605 if (h)
1606 {
1607 name = h->root.root.string;
1608 switch (ELF_ST_VISIBILITY (h->other))
1609 {
1610 case STV_HIDDEN:
1611 v = _("hidden symbol ");
1612 break;
1613 case STV_INTERNAL:
1614 v = _("internal symbol ");
1615 break;
1616 case STV_PROTECTED:
1617 v = _("protected symbol ");
1618 break;
1619 default:
1620 v = _("symbol ");
1621 pic = _("; recompile with -fPIC");
1622 break;
1623 }
1624
1625 if (!h->def_regular && !h->def_dynamic)
1626 und = _("undefined ");
1627 }
1628 else
1629 {
1630 name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL);
1631 pic = _("; recompile with -fPIC");
1632 }
1633
1634 (*_bfd_error_handler) (_("%B: relocation %s against %s%s`%s' can "
1635 "not be used when making a shared object%s"),
1636 input_bfd, howto->name, und, v, name, pic);
1637 bfd_set_error (bfd_error_bad_value);
1638 sec->check_relocs_failed = 1;
1639 return FALSE;
1640}
c1d11331 1641
70256ad8 1642/* Look through the relocs for a section during the first phase, and
c434dee6
AJ		 1643 calculate needed space in the global offset table, procedure
1644 linkage table, and dynamic reloc sections. */
70256ad8 1645
b34976b6 1646static bfd_boolean
351f65ca
L		 1647elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1648 asection *sec,
1649 const Elf_Internal_Rela *relocs)
70256ad8 1650{
351f65ca 1651 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 1652 Elf_Internal_Shdr *symtab_hdr;
1653 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ		 1654 const Elf_Internal_Rela *rel;
1655 const Elf_Internal_Rela *rel_end;
70256ad8 1656 asection *sreloc;
dd7e64d4 1657 bfd_boolean use_plt_got;
70256ad8 1658
0e1862bb 1659 if (bfd_link_relocatable (info))
b34976b6 1660 return TRUE;
70256ad8 1661
0ffa91dd
NC		 1662 BFD_ASSERT (is_x86_64_elf (abfd));
1663
351f65ca 1664 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1665 if (htab == NULL)
1666 return FALSE;
1667
dd7e64d4
L		 1668 use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed;
1669
0ffa91dd 1670 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8 1671 sym_hashes = elf_sym_hashes (abfd);
70256ad8 1672
c434dee6 1673 sreloc = NULL;
cbe950e9 1674
70256ad8
AJ		 1675 rel_end = relocs + sec->reloc_count;
1676 for (rel = relocs; rel < rel_end; rel++)
1677 {
bffbf940 1678 unsigned int r_type;
70256ad8
AJ		 1679 unsigned long r_symndx;
1680 struct elf_link_hash_entry *h;
aec6b87e 1681 struct elf_x86_64_link_hash_entry *eh;
4c544807
L		 1682 Elf_Internal_Sym *isym;
1683 const char *name;
06a6a421 1684 bfd_boolean size_reloc;
70256ad8 1685
351f65ca
L		 1686 r_symndx = htab->r_sym (rel->r_info);
1687 r_type = ELF32_R_TYPE (rel->r_info);
c434dee6
AJ		 1688
1689 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1690 {
d003868e
AM		 1691 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1692 abfd, r_symndx);
b34976b6 1693 return FALSE;
c434dee6
AJ		 1694 }
1695
70256ad8 1696 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1697 {
1698 /* A local symbol. */
c2e61a4e
L		 1699 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1700 abfd, r_symndx);
1701 if (isym == NULL)
1702 return FALSE;
c25bc9fc
L		 1703
1704 /* Check relocation against local STT_GNU_IFUNC symbol. */
351f65ca 1705 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
c25bc9fc 1706 {
351f65ca
L		 1707 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1708 TRUE);
c25bc9fc 1709 if (h == NULL)
c2e61a4e 1710 return FALSE;
6bbec505 1711
c25bc9fc
L		 1712 /* Fake a STT_GNU_IFUNC symbol. */
1713 h->type = STT_GNU_IFUNC;
1714 h->def_regular = 1;
1715 h->ref_regular = 1;
1716 h->forced_local = 1;
1717 h->root.type = bfd_link_hash_defined;
1718 }
1719 else
1720 h = NULL;
1721 }
70256ad8 1722 else
71cb9464 1723 {
4c544807 1724 isym = NULL;
71cb9464
L		 1725 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1726 while (h->root.type == bfd_link_hash_indirect
1727 || h->root.type == bfd_link_hash_warning)
1728 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1729 }
cbe950e9 1730
d1534d16
L		 1731 /* Check invalid x32 relocations. */
1732 if (!ABI_64_P (abfd))
1733 switch (r_type)
1734 {
1735 default:
1736 break;
1737
d1534d16
L		 1738 case R_X86_64_DTPOFF64:
1739 case R_X86_64_TPOFF64:
1740 case R_X86_64_PC64:
1741 case R_X86_64_GOTOFF64:
1742 case R_X86_64_GOT64:
1743 case R_X86_64_GOTPCREL64:
1744 case R_X86_64_GOTPC64:
1745 case R_X86_64_GOTPLT64:
1746 case R_X86_64_PLTOFF64:
1747 {
1748 if (h)
1749 name = h->root.root.string;
1750 else
1751 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1752 NULL);
1753 (*_bfd_error_handler)
1754 (_("%B: relocation %s against symbol `%s' isn't "
1755 "supported in x32 mode"), abfd,
1756 x86_64_elf_howto_table[r_type].name, name);
1757 bfd_set_error (bfd_error_bad_value);
1758 return FALSE;
1759 }
1760 break;
1761 }
1762
c25bc9fc
L		 1763 if (h != NULL)
1764 {
cbe950e9
L		 1765 switch (r_type)
1766 {
1767 default:
1768 break;
1769
0ff2b86e
L		 1770 case R_X86_64_PC32_BND:
1771 case R_X86_64_PLT32_BND:
d258b828
IZ		 1772 case R_X86_64_PC32:
1773 case R_X86_64_PLT32:
1774 case R_X86_64_32:
1775 case R_X86_64_64:
0ff2b86e
L		 1776 /* MPX PLT is supported only if elf_x86_64_arch_bed
1777 is used in 64-bit mode. */
1778 if (ABI_64_P (abfd)
d258b828
IZ		 1779 && info->bndplt
1780 && (get_elf_x86_64_backend_data (abfd)
1781 == &elf_x86_64_arch_bed))
0ff2b86e 1782 {
bc696fd5 1783 elf_x86_64_hash_entry (h)->has_bnd_reloc = 1;
0ff2b86e
L		 1784
1785 /* Create the second PLT for Intel MPX support. */
1786 if (htab->plt_bnd == NULL)
1787 {
1788 unsigned int plt_bnd_align;
1789 const struct elf_backend_data *bed;
1790
1791 bed = get_elf_backend_data (info->output_bfd);
6db50b4c
L		 1792 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8
1793 && (sizeof (elf_x86_64_bnd_plt2_entry)
1794 == sizeof (elf_x86_64_legacy_plt2_entry)));
1795 plt_bnd_align = 3;
0ff2b86e
L		 1796
1797 if (htab->elf.dynobj == NULL)
1798 htab->elf.dynobj = abfd;
1799 htab->plt_bnd
1800 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1801 ".plt.bnd",
1802 (bed->dynamic_sec_flags
1803 | SEC_ALLOC
1804 | SEC_CODE
1805 | SEC_LOAD
1806 | SEC_READONLY));
1807 if (htab->plt_bnd == NULL
1808 || !bfd_set_section_alignment (htab->elf.dynobj,
1809 htab->plt_bnd,
1810 plt_bnd_align))
1811 return FALSE;
1812 }
1813 }
1814
cbe950e9 1815 case R_X86_64_32S:
cbe950e9 1816 case R_X86_64_PC64:
cbe950e9 1817 case R_X86_64_GOTPCREL:
56ceb5b5
L		 1818 case R_X86_64_GOTPCRELX:
1819 case R_X86_64_REX_GOTPCRELX:
cbe950e9 1820 case R_X86_64_GOTPCREL64:
9d4057ee
AM		 1821 if (htab->elf.dynobj == NULL)
1822 htab->elf.dynobj = abfd;
466ee2af
L		 1823 /* Create the ifunc sections for static executables. */
1824 if (h->type == STT_GNU_IFUNC
1825 && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj,
1826 info))
c2e61a4e 1827 return FALSE;
cbe950e9
L		 1828 break;
1829 }
1830
ad1e85de
L		 1831 /* It is referenced by a non-shared object. */
1832 h->ref_regular = 1;
61315175 1833 h->root.non_ir_ref = 1;
13a2df29
L		 1834
1835 if (h->type == STT_GNU_IFUNC)
1836 elf_tdata (info->output_bfd)->has_gnu_symbols
1837 |= elf_gnu_symbol_ifunc;
71cb9464 1838 }
70256ad8 1839
351f65ca
L		 1840 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1841 symtab_hdr, sym_hashes,
1842 &r_type, GOT_UNKNOWN,
1843 rel, rel_end, h, r_symndx))
c2e61a4e 1844 return FALSE;
142411ca 1845
aec6b87e 1846 eh = (struct elf_x86_64_link_hash_entry *) h;
bffbf940 1847 switch (r_type)
70256ad8 1848 {
bffbf940
JJ		 1849 case R_X86_64_TLSLD:
1850 htab->tls_ld_got.refcount += 1;
1851 goto create_got;
1852
1853 case R_X86_64_TPOFF32:
0e1862bb 1854 if (!bfd_link_executable (info) && ABI_64_P (abfd))
338c190a
L		 1855 return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym,
1856 &x86_64_elf_howto_table[r_type]);
aec6b87e
L		 1857 if (eh != NULL)
1858 eh->has_got_reloc = 1;
bffbf940 1859 break;
c434dee6 1860
bffbf940 1861 case R_X86_64_GOTTPOFF:
0e1862bb 1862 if (!bfd_link_executable (info))
bffbf940
JJ		 1863 info->flags |= DF_STATIC_TLS;
1864 /* Fall through */
70256ad8 1865
bffbf940
JJ		 1866 case R_X86_64_GOT32:
1867 case R_X86_64_GOTPCREL:
56ceb5b5
L		 1868 case R_X86_64_GOTPCRELX:
1869 case R_X86_64_REX_GOTPCRELX:
bffbf940 1870 case R_X86_64_TLSGD:
7b81dfbb
AJ		 1871 case R_X86_64_GOT64:
1872 case R_X86_64_GOTPCREL64:
1873 case R_X86_64_GOTPLT64:
67a4f2b7
AO		 1874 case R_X86_64_GOTPC32_TLSDESC:
1875 case R_X86_64_TLSDESC_CALL:
bffbf940
JJ		 1876 /* This symbol requires a global offset table entry. */
1877 {
1878 int tls_type, old_tls_type;
1879
1880 switch (r_type)
1881 {
1882 default: tls_type = GOT_NORMAL; break;
1883 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1884 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
67a4f2b7
AO		 1885 case R_X86_64_GOTPC32_TLSDESC:
1886 case R_X86_64_TLSDESC_CALL:
1887 tls_type = GOT_TLS_GDESC; break;
bffbf940
JJ		 1888 }
1889
1890 if (h != NULL)
1891 {
1892 h->got.refcount += 1;
aec6b87e 1893 old_tls_type = eh->tls_type;
bffbf940
JJ		 1894 }
1895 else
1896 {
1897 bfd_signed_vma *local_got_refcounts;
1898
1899 /* This is a global offset table entry for a local symbol. */
1900 local_got_refcounts = elf_local_got_refcounts (abfd);
1901 if (local_got_refcounts == NULL)
1902 {
1903 bfd_size_type size;
1904
1905 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1906 size *= sizeof (bfd_signed_vma)
1907 + sizeof (bfd_vma) + sizeof (char);
bffbf940
JJ		 1908 local_got_refcounts = ((bfd_signed_vma *)
1909 bfd_zalloc (abfd, size));
1910 if (local_got_refcounts == NULL)
c2e61a4e 1911 return FALSE;
bffbf940 1912 elf_local_got_refcounts (abfd) = local_got_refcounts;
351f65ca 1913 elf_x86_64_local_tlsdesc_gotent (abfd)
67a4f2b7 1914 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
351f65ca 1915 elf_x86_64_local_got_tls_type (abfd)
67a4f2b7 1916 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
bffbf940
JJ		 1917 }
1918 local_got_refcounts[r_symndx] += 1;
1919 old_tls_type
351f65ca 1920 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
bffbf940
JJ		 1921 }
1922
1923 /* If a TLS symbol is accessed using IE at least once,
1924 there is no point to use dynamic model for it. */
1925 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7
AO		 1926 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1927 || tls_type != GOT_TLS_IE))
bffbf940 1928 {
67a4f2b7 1929 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
bffbf940 1930 tls_type = old_tls_type;
67a4f2b7
AO		 1931 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1932 && GOT_TLS_GD_ANY_P (tls_type))
1933 tls_type |= old_tls_type;
bffbf940
JJ		 1934 else
1935 {
09a24cbf 1936 if (h)
4c544807
L		 1937 name = h->root.root.string;
1938 else
1939 name = bfd_elf_sym_name (abfd, symtab_hdr,
1940 isym, NULL);
bffbf940 1941 (*_bfd_error_handler)
1f7a4e42 1942 (_("%B: '%s' accessed both as normal and thread local symbol"),
4c544807 1943 abfd, name);
68c4a57e 1944 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1945 return FALSE;
bffbf940
JJ		 1946 }
1947 }
1948
1949 if (old_tls_type != tls_type)
1950 {
aec6b87e
L		 1951 if (eh != NULL)
1952 eh->tls_type = tls_type;
bffbf940 1953 else
351f65ca 1954 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
bffbf940
JJ		 1955 }
1956 }
c434dee6
AJ		 1957 /* Fall through */
1958
d6ab8113
JB		 1959 case R_X86_64_GOTOFF64:
1960 case R_X86_64_GOTPC32:
7b81dfbb 1961 case R_X86_64_GOTPC64:
bffbf940 1962 create_got:
aec6b87e
L		 1963 if (eh != NULL)
1964 eh->has_got_reloc = 1;
6de2ae4a 1965 if (htab->elf.sgot == NULL)
c434dee6
AJ		 1966 {
1967 if (htab->elf.dynobj == NULL)
1968 htab->elf.dynobj = abfd;
6de2ae4a
L		 1969 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1970 info))
c2e61a4e 1971 return FALSE;
c434dee6 1972 }
70256ad8
AJ		 1973 break;
1974
1975 case R_X86_64_PLT32:
c3320543 1976 case R_X86_64_PLT32_BND:
70256ad8 1977 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ		 1978 actually build the entry in adjust_dynamic_symbol,
1979 because this might be a case of linking PIC code which is
1980 never referenced by a dynamic object, in which case we
1981 don't need to generate a procedure linkage table entry
1982 after all. */
70256ad8
AJ		 1983
1984 /* If this is a local symbol, we resolve it directly without
407443a3 1985 creating a procedure linkage table entry. */
70256ad8
AJ		 1986 if (h == NULL)
1987 continue;
1988
aec6b87e 1989 eh->has_got_reloc = 1;
f5385ebf 1990 h->needs_plt = 1;
51b64d56 1991 h->plt.refcount += 1;
70256ad8
AJ		 1992 break;
1993
7b81dfbb
AJ		 1994 case R_X86_64_PLTOFF64:
1995 /* This tries to form the 'address' of a function relative
1996 to GOT. For global symbols we need a PLT entry. */
1997 if (h != NULL)
1998 {
1999 h->needs_plt = 1;
2000 h->plt.refcount += 1;
2001 }
2002 goto create_got;
2003
6a3e1bae
L		 2004 case R_X86_64_SIZE32:
2005 case R_X86_64_SIZE64:
06a6a421 2006 size_reloc = TRUE;
6a3e1bae
L		 2007 goto do_size;
2008
248775ba
L		 2009 case R_X86_64_32:
2010 if (!ABI_64_P (abfd))
2011 goto pointer;
cc78d0af
AJ		 2012 case R_X86_64_8:
2013 case R_X86_64_16:
70256ad8 2014 case R_X86_64_32S:
338c190a
L		 2015 /* Check relocation overflow as these relocs may lead to
2016 run-time relocation overflow. Don't error out for
1b71fb54 2017 sections we don't care about, such as debug sections or
338c190a 2018 when relocation overflow check is disabled. */
4c10bbaa 2019 if (!info->no_reloc_overflow_check
338c190a
L		 2020 && (bfd_link_pic (info)
2021 || (bfd_link_executable (info)
2022 && h != NULL
2023 && !h->def_regular
2024 && h->def_dynamic
2025 && (sec->flags & SEC_READONLY) == 0))
2026 && (sec->flags & SEC_ALLOC) != 0)
2027 return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym,
2028 &x86_64_elf_howto_table[r_type]);
1b71fb54
AJ		 2029 /* Fall through. */
2030
c434dee6
AJ		 2031 case R_X86_64_PC8:
2032 case R_X86_64_PC16:
70256ad8 2033 case R_X86_64_PC32:
c3320543 2034 case R_X86_64_PC32_BND:
d6ab8113 2035 case R_X86_64_PC64:
1b71fb54 2036 case R_X86_64_64:
248775ba 2037pointer:
aec6b87e
L		 2038 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2039 eh->has_non_got_reloc = 1;
d1ed1c7d
L		 2040 /* STT_GNU_IFUNC symbol must go through PLT even if it is
2041 locally defined and undefined symbol may turn out to be
2042 a STT_GNU_IFUNC symbol later. */
2043 if (h != NULL
2044 && (bfd_link_executable (info)
2045 || ((h->type == STT_GNU_IFUNC
2046 || h->root.type == bfd_link_hash_undefweak
2047 || h->root.type == bfd_link_hash_undefined)
2048 && SYMBOLIC_BIND (info, h))))
c434dee6
AJ		 2049 {
2050 /* If this reloc is in a read-only section, we might
2051 need a copy reloc. We can't check reliably at this
2052 stage whether the section is read-only, as input
2053 sections have not yet been mapped to output sections.
2054 Tentatively set the flag for now, and correct in
2055 adjust_dynamic_symbol. */
f5385ebf 2056 h->non_got_ref = 1;
c434dee6
AJ		 2057
2058 /* We may need a .plt entry if the function this reloc
2059 refers to is in a shared lib. */
2060 h->plt.refcount += 1;
5db4f0d3
L		 2061 if (r_type == R_X86_64_PC32)
2062 {
2063 /* Since something like ".long foo - ." may be used
2064 as pointer, make sure that PLT is used if foo is
2065 a function defined in a shared library. */
2066 if ((sec->flags & SEC_CODE) == 0)
2067 h->pointer_equality_needed = 1;
2068 }
2069 else if (r_type != R_X86_64_PC32_BND
2070 && r_type != R_X86_64_PC64)
04ebc307
L		 2071 {
2072 h->pointer_equality_needed = 1;
2073 /* At run-time, R_X86_64_64 can be resolved for both
2074 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2075 can only be resolved for x32. */
2076 if ((sec->flags & SEC_READONLY) == 0
2077 && (r_type == R_X86_64_64
2078 || (!ABI_64_P (abfd)
2079 && (r_type == R_X86_64_32
2080 || r_type == R_X86_64_32S))))
aec6b87e 2081 eh->func_pointer_refcount += 1;
04ebc307 2082 }
c434dee6 2083 }
70256ad8 2084
06a6a421 2085 size_reloc = FALSE;
6a3e1bae 2086do_size:
70256ad8
AJ		 2087 /* If we are creating a shared library, and this is a reloc
2088 against a global symbol, or a non PC relative reloc
2089 against a local symbol, then we need to copy the reloc
2090 into the shared library. However, if we are linking with
2091 -Bsymbolic, we do not need to copy a reloc against a
2092 global symbol which is defined in an object we are
407443a3 2093 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ		 2094 this point we have not seen all the input files, so it is
2095 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ		 2096 later (it is never cleared). In case of a weak definition,
2097 DEF_REGULAR may be cleared later by a strong definition in
2098 a shared library. We account for that possibility below by
2099 storing information in the relocs_copied field of the hash
2100 table entry. A similar situation occurs when creating
2101 shared libraries and symbol visibility changes render the
31c0ebfe 2102 symbol local.
c434dee6
AJ		 2103
2104 If on the other hand, we are creating an executable, we
2105 may need to keep relocations for symbols satisfied by a
2106 dynamic library if we manage to avoid copy relocs for the
0f88be7a 2107 symbol. */
0e1862bb 2108 if ((bfd_link_pic (info)
c434dee6 2109 && (sec->flags & SEC_ALLOC) != 0
d8045f23 2110 && (! IS_X86_64_PCREL_TYPE (r_type)
c434dee6 2111 || (h != NULL
4e0c91e4
L		 2112 && (! (bfd_link_pie (info)
2113 || SYMBOLIC_BIND (info, h))
c434dee6 2114 || h->root.type == bfd_link_hash_defweak
f5385ebf 2115 || !h->def_regular))))
d40d037c 2116 || (ELIMINATE_COPY_RELOCS
0e1862bb 2117 && !bfd_link_pic (info)
c434dee6
AJ		 2118 && (sec->flags & SEC_ALLOC) != 0
2119 && h != NULL
2120 && (h->root.type == bfd_link_hash_defweak
0f88be7a 2121 || !h->def_regular)))
70256ad8 2122 {
e03a8ed8
L		 2123 struct elf_dyn_relocs *p;
2124 struct elf_dyn_relocs **head;
c434dee6
AJ		 2125
2126 /* We must copy these reloc types into the output file.
2127 Create a reloc section in dynobj and make room for
2128 this reloc. */
70256ad8
AJ		 2129 if (sreloc == NULL)
2130 {
c434dee6
AJ		 2131 if (htab->elf.dynobj == NULL)
2132 htab->elf.dynobj = abfd;
2133
83bac4b0 2134 sreloc = _bfd_elf_make_dynamic_reloc_section
82e96e07
L		 2135 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2136 abfd, /*rela?*/ TRUE);
70256ad8 2137
70256ad8 2138 if (sreloc == NULL)
c2e61a4e 2139 return FALSE;
70256ad8
AJ		 2140 }
2141
c434dee6
AJ		 2142 /* If this is a global symbol, we count the number of
2143 relocations we need for this symbol. */
2144 if (h != NULL)
aec6b87e 2145 head = &eh->dyn_relocs;
c434dee6
AJ		 2146 else
2147 {
2148 /* Track dynamic relocs needed for local syms too.
2149 We really need local syms available to do this
2150 easily. Oh well. */
c434dee6 2151 asection *s;
87d72d41 2152 void **vpp;
87d72d41
AM		 2153
2154 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2155 abfd, r_symndx);
2156 if (isym == NULL)
2157 return FALSE;
2158
2159 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
c434dee6 2160 if (s == NULL)
87d72d41 2161 s = sec;
70256ad8 2162
e81d3500
DD		 2163 /* Beware of type punned pointers vs strict aliasing
2164 rules. */
2165 vpp = &(elf_section_data (s)->local_dynrel);
e03a8ed8 2166 head = (struct elf_dyn_relocs **)vpp;
c434dee6 2167 }
70256ad8 2168
c434dee6
AJ		 2169 p = *head;
2170 if (p == NULL || p->sec != sec)
2171 {
2172 bfd_size_type amt = sizeof *p;
d8045f23 2173
e03a8ed8 2174 p = ((struct elf_dyn_relocs *)
c434dee6 2175 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 2176 if (p == NULL)
c2e61a4e 2177 return FALSE;
c434dee6
AJ		 2178 p->next = *head;
2179 *head = p;
2180 p->sec = sec;
2181 p->count = 0;
2182 p->pc_count = 0;
70256ad8 2183 }
c434dee6
AJ		 2184
2185 p->count += 1;
06a6a421
L		 2186 /* Count size relocation as PC-relative relocation. */
2187 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
c434dee6 2188 p->pc_count += 1;
70256ad8
AJ		 2189 }
2190 break;
fe4770f4
AJ		 2191
2192 /* This relocation describes the C++ object vtable hierarchy.
2193 Reconstruct it for later use during GC. */
2194 case R_X86_64_GNU_VTINHERIT:
c152c796 2195 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 2196 return FALSE;
fe4770f4
AJ		 2197 break;
2198
2199 /* This relocation describes which C++ vtable entries are actually
2200 used. Record for later use during GC. */
2201 case R_X86_64_GNU_VTENTRY:
d17e0c6e
JB		 2202 BFD_ASSERT (h != NULL);
2203 if (h != NULL
2204 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
c2e61a4e 2205 return FALSE;
fe4770f4 2206 break;
c434dee6
AJ		 2207
2208 default:
2209 break;
70256ad8 2210 }
dd7e64d4
L		 2211
2212 if (use_plt_got
2213 && h != NULL
2214 && h->plt.refcount > 0
8ded2ddc
L		 2215 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2216 || h->got.refcount > 0)
dd7e64d4
L		 2217 && htab->plt_got == NULL)
2218 {
2219 /* Create the GOT procedure linkage table. */
2220 unsigned int plt_got_align;
2221 const struct elf_backend_data *bed;
2222
2223 bed = get_elf_backend_data (info->output_bfd);
2224 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8
2225 && (sizeof (elf_x86_64_bnd_plt2_entry)
2226 == sizeof (elf_x86_64_legacy_plt2_entry)));
2227 plt_got_align = 3;
2228
2229 if (htab->elf.dynobj == NULL)
2230 htab->elf.dynobj = abfd;
2231 htab->plt_got
2232 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2233 ".plt.got",
2234 (bed->dynamic_sec_flags
2235 | SEC_ALLOC
2236 | SEC_CODE
2237 | SEC_LOAD
2238 | SEC_READONLY));
2239 if (htab->plt_got == NULL
2240 || !bfd_set_section_alignment (htab->elf.dynobj,
2241 htab->plt_got,
2242 plt_got_align))
2243 return FALSE;
2244 }
c1d11331 2245
56ceb5b5
L		 2246 if ((r_type == R_X86_64_GOTPCREL
2247 || r_type == R_X86_64_GOTPCRELX
2248 || r_type == R_X86_64_REX_GOTPCRELX)
c1d11331 2249 && (h == NULL || h->type != STT_GNU_IFUNC))
56ceb5b5 2250 sec->need_convert_load = 1;
70256ad8
AJ		 2251 }
2252
b34976b6 2253 return TRUE;
70256ad8
AJ		 2254}
2255
2256/* Return the section that should be marked against GC for a given
407443a3 2257 relocation. */
70256ad8
AJ		 2258
2259static asection *
351f65ca
L		 2260elf_x86_64_gc_mark_hook (asection *sec,
2261 struct bfd_link_info *info,
2262 Elf_Internal_Rela *rel,
2263 struct elf_link_hash_entry *h,
2264 Elf_Internal_Sym *sym)
70256ad8
AJ		 2265{
2266 if (h != NULL)
351f65ca 2267 switch (ELF32_R_TYPE (rel->r_info))
07adf181
AM		 2268 {
2269 case R_X86_64_GNU_VTINHERIT:
2270 case R_X86_64_GNU_VTENTRY:
2271 return NULL;
2272 }
2273
2274 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
70256ad8
AJ		 2275}
2276
aec6b87e
L		 2277/* Remove undefined weak symbol from the dynamic symbol table if it
2278 is resolved to 0. */
2279
2280static bfd_boolean
2281elf_x86_64_fixup_symbol (struct bfd_link_info *info,
2282 struct elf_link_hash_entry *h)
2283{
2284 if (h->dynindx != -1
2285 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2286 elf_x86_64_hash_entry (h)))
2287 {
2288 h->dynindx = -1;
2289 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2290 h->dynstr_index);
2291 }
2292 return TRUE;
2293}
2294
70256ad8
AJ		 2295/* Adjust a symbol defined by a dynamic object and referenced by a
2296 regular object. The current definition is in some section of the
2297 dynamic object, but we're not including those sections. We have to
2298 change the definition to something the rest of the link can
407443a3 2299 understand. */
70256ad8 2300
b34976b6 2301static bfd_boolean
351f65ca
L		 2302elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2303 struct elf_link_hash_entry *h)
70256ad8 2304{
351f65ca 2305 struct elf_x86_64_link_hash_table *htab;
70256ad8 2306 asection *s;
5ca5bb35
L		 2307 struct elf_x86_64_link_hash_entry *eh;
2308 struct elf_dyn_relocs *p;
70256ad8 2309
cbe950e9
L		 2310 /* STT_GNU_IFUNC symbol must go through PLT. */
2311 if (h->type == STT_GNU_IFUNC)
2312 {
73bcf233
L		 2313 /* All local STT_GNU_IFUNC references must be treate as local
2314 calls via local PLT. */
5ca5bb35
L		 2315 if (h->ref_regular
2316 && SYMBOL_CALLS_LOCAL (info, h))
2317 {
73bcf233 2318 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L		 2319 struct elf_dyn_relocs **pp;
2320
2321 eh = (struct elf_x86_64_link_hash_entry *) h;
2322 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2323 {
2324 pc_count += p->pc_count;
2325 p->count -= p->pc_count;
2326 p->pc_count = 0;
73bcf233 2327 count += p->count;
5ca5bb35
L		 2328 if (p->count == 0)
2329 *pp = p->next;
2330 else
2331 pp = &p->next;
2332 }
2333
73bcf233 2334 if (pc_count || count)
5ca5bb35
L		 2335 {
2336 h->needs_plt = 1;
5ca5bb35 2337 h->non_got_ref = 1;
a5479e5f
L		 2338 if (h->plt.refcount <= 0)
2339 h->plt.refcount = 1;
2340 else
2341 h->plt.refcount += 1;
5ca5bb35
L		 2342 }
2343 }
2344
cbe950e9
L		 2345 if (h->plt.refcount <= 0)
2346 {
2347 h->plt.offset = (bfd_vma) -1;
2348 h->needs_plt = 0;
2349 }
2350 return TRUE;
2351 }
2352
70256ad8
AJ		 2353 /* If this is a function, put it in the procedure linkage table. We
2354 will fill in the contents of the procedure linkage table later,
2355 when we know the address of the .got section. */
2356 if (h->type == STT_FUNC
f5385ebf 2357 || h->needs_plt)
70256ad8 2358 {
c434dee6 2359 if (h->plt.refcount <= 0
27482721
AJ		 2360 || SYMBOL_CALLS_LOCAL (info, h)
2361 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2362 && h->root.type == bfd_link_hash_undefweak))
70256ad8 2363 {
70256ad8
AJ		 2364 /* This case can occur if we saw a PLT32 reloc in an input
2365 file, but the symbol was never referred to by a dynamic
2366 object, or if all references were garbage collected. In
2367 such a case, we don't actually need to build a procedure
2368 linkage table, and we can just do a PC32 reloc instead. */
70256ad8 2369 h->plt.offset = (bfd_vma) -1;
f5385ebf 2370 h->needs_plt = 0;
70256ad8
AJ		 2371 }
2372
b34976b6 2373 return TRUE;
70256ad8 2374 }
bbd7ec4a 2375 else
c434dee6
AJ		 2376 /* It's possible that we incorrectly decided a .plt reloc was
2377 needed for an R_X86_64_PC32 reloc to a non-function sym in
2378 check_relocs. We can't decide accurately between function and
2379 non-function syms in check-relocs; Objects loaded later in
2380 the link may change h->type. So fix it now. */
bbd7ec4a 2381 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ		 2382
2383 /* If this is a weak symbol, and there is a real definition, the
2384 processor independent code will have arranged for us to see the
407443a3 2385 real definition first, and we can just use the same value. */
f6e332e6 2386 if (h->u.weakdef != NULL)
70256ad8 2387 {
f6e332e6
AM		 2388 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2389 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2390 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2391 h->root.u.def.value = h->u.weakdef->root.u.def.value;
d40d037c 2392 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
bc696fd5
L		 2393 {
2394 eh = (struct elf_x86_64_link_hash_entry *) h;
2395 h->non_got_ref = h->u.weakdef->non_got_ref;
2396 eh->needs_copy = h->u.weakdef->needs_copy;
2397 }
b34976b6 2398 return TRUE;
70256ad8
AJ		 2399 }
2400
2401 /* This is a reference to a symbol defined by a dynamic object which
407443a3 2402 is not a function. */
70256ad8
AJ		 2403
2404 /* If we are creating a shared library, we must presume that the
2405 only references to the symbol are via the global offset table.
2406 For such cases we need not do anything here; the relocations will
407443a3 2407 be handled correctly by relocate_section. */
0e1862bb 2408 if (!bfd_link_executable (info))
b34976b6 2409 return TRUE;
70256ad8
AJ		 2410
2411 /* If there are no references to this symbol that do not use the
2412 GOT, we don't need to generate a copy reloc. */
f5385ebf 2413 if (!h->non_got_ref)
b34976b6 2414 return TRUE;
70256ad8 2415
c434dee6
AJ		 2416 /* If -z nocopyreloc was given, we won't generate them either. */
2417 if (info->nocopyreloc)
2418 {
f5385ebf 2419 h->non_got_ref = 0;
b34976b6 2420 return TRUE;
c434dee6
AJ		 2421 }
2422
31c0ebfe 2423 if (ELIMINATE_COPY_RELOCS)
c434dee6 2424 {
351f65ca 2425 eh = (struct elf_x86_64_link_hash_entry *) h;
d40d037c
AJ		 2426 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2427 {
2428 s = p->sec->output_section;
2429 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2430 break;
2431 }
2432
2433 /* If we didn't find any dynamic relocs in read-only sections, then
2434 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2435 if (p == NULL)
2436 {
f5385ebf 2437 h->non_got_ref = 0;
d40d037c
AJ		 2438 return TRUE;
2439 }
c434dee6
AJ		 2440 }
2441
70256ad8 2442 /* We must allocate the symbol in our .dynbss section, which will
407443a3 2443 become part of the .bss section of the executable. There will be
70256ad8
AJ		 2444 an entry for this symbol in the .dynsym section. The dynamic
2445 object will contain position independent code, so all references
2446 from the dynamic object to this symbol will go through the global
2447 offset table. The dynamic linker will use the .dynsym entry to
2448 determine the address it must put in the global offset table, so
2449 both the dynamic object and the regular object will refer to the
2450 same memory location for the variable. */
2451
351f65ca 2452 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2453 if (htab == NULL)
2454 return FALSE;
70256ad8
AJ		 2455
2456 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2457 to copy the initial value out of the dynamic object and into the
cedb70c5 2458 runtime process image. */
1d7e9d18 2459 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
70256ad8 2460 {
351f65ca
L		 2461 const struct elf_backend_data *bed;
2462 bed = get_elf_backend_data (info->output_bfd);
2463 htab->srelbss->size += bed->s->sizeof_rela;
f5385ebf 2464 h->needs_copy = 1;
70256ad8
AJ		 2465 }
2466
c434dee6 2467 s = htab->sdynbss;
70256ad8 2468
6cabe1ea 2469 return _bfd_elf_adjust_dynamic_copy (info, h, s);
70256ad8
AJ		 2470}
2471
c434dee6
AJ		 2472/* Allocate space in .plt, .got and associated reloc sections for
2473 dynamic relocs. */
2474
b34976b6 2475static bfd_boolean
351f65ca 2476elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 2477{
2478 struct bfd_link_info *info;
351f65ca
L		 2479 struct elf_x86_64_link_hash_table *htab;
2480 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2481 struct elf_dyn_relocs *p;
351f65ca 2482 const struct elf_backend_data *bed;
eed180f8 2483 unsigned int plt_entry_size;
aec6b87e 2484 bfd_boolean resolved_to_zero;
c434dee6 2485
e92d460e 2486 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2487 return TRUE;
c434dee6 2488
351f65ca 2489 eh = (struct elf_x86_64_link_hash_entry *) h;
e92d460e 2490
c434dee6 2491 info = (struct bfd_link_info *) inf;
351f65ca 2492 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2493 if (htab == NULL)
2494 return FALSE;
351f65ca 2495 bed = get_elf_backend_data (info->output_bfd);
eed180f8 2496 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
c434dee6 2497
aec6b87e
L		 2498 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
2499
dd7e64d4
L		 2500 /* We can't use the GOT PLT if pointer equality is needed since
2501 finish_dynamic_symbol won't clear symbol value and the dynamic
2502 linker won't update the GOT slot. We will get into an infinite
2503 loop at run-time. */
2504 if (htab->plt_got != NULL
2505 && h->type != STT_GNU_IFUNC
2506 && !h->pointer_equality_needed
2507 && h->plt.refcount > 0
2508 && h->got.refcount > 0)
2509 {
2510 /* Don't use the regular PLT if there are both GOT and GOTPLT
2511 reloctions. */
2512 h->plt.offset = (bfd_vma) -1;
2513
2514 /* Use the GOT PLT. */
2515 eh->plt_got.refcount = 1;
2516 }
2517
04ebc307
L		 2518 /* Clear the reference count of function pointer relocations if
2519 symbol isn't a normal function. */
2520 if (h->type != STT_FUNC)
2521 eh->func_pointer_refcount = 0;
2522
cbe950e9
L		 2523 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2524 here if it is defined and referenced in a non-shared object. */
2525 if (h->type == STT_GNU_IFUNC
2526 && h->def_regular)
0ff2b86e
L		 2527 {
2528 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2529 &eh->dyn_relocs,
2df3368d 2530 &htab->readonly_dynrelocs_against_ifunc,
0ff2b86e
L		 2531 plt_entry_size,
2532 plt_entry_size,
2533 GOT_ENTRY_SIZE))
2534 {
2535 asection *s = htab->plt_bnd;
2536 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2537 {
2538 /* Use the .plt.bnd section if it is created. */
2539 eh->plt_bnd.offset = s->size;
2540
2541 /* Make room for this entry in the .plt.bnd section. */
2542 s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2543 }
2544
2545 return TRUE;
2546 }
2547 else
2548 return FALSE;
2549 }
04ebc307
L		 2550 /* Don't create the PLT entry if there are only function pointer
2551 relocations which can be resolved at run-time. */
cbe950e9 2552 else if (htab->elf.dynamic_sections_created
04ebc307
L		 2553 && (h->plt.refcount > eh->func_pointer_refcount
2554 || eh->plt_got.refcount > 0))
c434dee6 2555 {
25070364
L		 2556 bfd_boolean use_plt_got;
2557
04ebc307
L		 2558 /* Clear the reference count of function pointer relocations
2559 if PLT is used. */
2560 eh->func_pointer_refcount = 0;
2561
8ded2ddc 2562 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
25070364
L		 2563 {
2564 /* Don't use the regular PLT for DF_BIND_NOW. */
2565 h->plt.offset = (bfd_vma) -1;
2566
2567 /* Use the GOT PLT. */
2568 h->got.refcount = 1;
2569 eh->plt_got.refcount = 1;
2570 }
2571
2572 use_plt_got = eh->plt_got.refcount > 0;
dd7e64d4 2573
c434dee6
AJ		 2574 /* Make sure this symbol is output as a dynamic symbol.
2575 Undefined weak syms won't yet be marked as dynamic. */
2576 if (h->dynindx == -1
aec6b87e
L		 2577 && !h->forced_local
2578 && !resolved_to_zero)
c434dee6 2579 {
c152c796 2580 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2581 return FALSE;
c434dee6
AJ		 2582 }
2583
0e1862bb 2584 if (bfd_link_pic (info)
27482721 2585 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6 2586 {
6de2ae4a 2587 asection *s = htab->elf.splt;
0ff2b86e 2588 asection *bnd_s = htab->plt_bnd;
dd7e64d4 2589 asection *got_s = htab->plt_got;
c434dee6 2590
7c1e8d3e
L		 2591 /* If this is the first .plt entry, make room for the special
2592 first entry. The .plt section is used by prelink to undo
2593 prelinking for dynamic relocations. */
2594 if (s->size == 0)
2595 s->size = plt_entry_size;
2596
dd7e64d4
L		 2597 if (use_plt_got)
2598 eh->plt_got.offset = got_s->size;
2599 else
2600 {
2601 h->plt.offset = s->size;
2602 if (bnd_s)
2603 eh->plt_bnd.offset = bnd_s->size;
2604 }
c434dee6
AJ		 2605
2606 /* If this symbol is not defined in a regular file, and we are
2607 not generating a shared library, then set the symbol to this
2608 location in the .plt. This is required to make function
2609 pointers compare as equal between the normal executable and
2610 the shared library. */
0e1862bb 2611 if (! bfd_link_pic (info)
f5385ebf 2612 && !h->def_regular)
c434dee6 2613 {
dd7e64d4 2614 if (use_plt_got)
0ff2b86e 2615 {
dd7e64d4
L		 2616 /* We need to make a call to the entry of the GOT PLT
2617 instead of regular PLT entry. */
2618 h->root.u.def.section = got_s;
2619 h->root.u.def.value = eh->plt_got.offset;
0ff2b86e
L		 2620 }
2621 else
2622 {
dd7e64d4
L		 2623 if (bnd_s)
2624 {
2625 /* We need to make a call to the entry of the second
2626 PLT instead of regular PLT entry. */
2627 h->root.u.def.section = bnd_s;
2628 h->root.u.def.value = eh->plt_bnd.offset;
2629 }
2630 else
2631 {
2632 h->root.u.def.section = s;
2633 h->root.u.def.value = h->plt.offset;
2634 }
0ff2b86e 2635 }
c434dee6
AJ		 2636 }
2637
2638 /* Make room for this entry. */
dd7e64d4
L		 2639 if (use_plt_got)
2640 got_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2641 else
2642 {
2643 s->size += plt_entry_size;
2644 if (bnd_s)
2645 bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
c434dee6 2646
dd7e64d4
L		 2647 /* We also need to make an entry in the .got.plt section,
2648 which will be placed in the .got section by the linker
2649 script. */
2650 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
c434dee6 2651
aec6b87e
L		 2652 /* There should be no PLT relocation against resolved
2653 undefined weak symbol in executable. */
2654 if (!resolved_to_zero)
2655 {
2656 /* We also need to make an entry in the .rela.plt
2657 section. */
2658 htab->elf.srelplt->size += bed->s->sizeof_rela;
2659 htab->elf.srelplt->reloc_count++;
2660 }
dd7e64d4 2661 }
c434dee6
AJ		 2662 }
2663 else
2664 {
13f42277 2665 eh->plt_got.offset = (bfd_vma) -1;
c434dee6 2666 h->plt.offset = (bfd_vma) -1;
f5385ebf 2667 h->needs_plt = 0;
c434dee6
AJ		 2668 }
2669 }
2670 else
2671 {
13f42277 2672 eh->plt_got.offset = (bfd_vma) -1;
c434dee6 2673 h->plt.offset = (bfd_vma) -1;
f5385ebf 2674 h->needs_plt = 0;
c434dee6
AJ		 2675 }
2676
67a4f2b7
AO		 2677 eh->tlsdesc_got = (bfd_vma) -1;
2678
bffbf940
JJ		 2679 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2680 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2681 if (h->got.refcount > 0
0e1862bb 2682 && bfd_link_executable (info)
bffbf940 2683 && h->dynindx == -1
351f65ca 2684 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
d8045f23
NC		 2685 {
2686 h->got.offset = (bfd_vma) -1;
2687 }
bffbf940 2688 else if (h->got.refcount > 0)
c434dee6
AJ		 2689 {
2690 asection *s;
b34976b6 2691 bfd_boolean dyn;
351f65ca 2692 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ		 2693
2694 /* Make sure this symbol is output as a dynamic symbol.
2695 Undefined weak syms won't yet be marked as dynamic. */
2696 if (h->dynindx == -1
aec6b87e
L		 2697 && !h->forced_local
2698 && !resolved_to_zero)
c434dee6 2699 {
c152c796 2700 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2701 return FALSE;
c434dee6
AJ		 2702 }
2703
67a4f2b7
AO		 2704 if (GOT_TLS_GDESC_P (tls_type))
2705 {
6de2ae4a 2706 eh->tlsdesc_got = htab->elf.sgotplt->size
351f65ca 2707 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2708 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 2709 h->got.offset = (bfd_vma) -2;
2710 }
2711 if (! GOT_TLS_GDESC_P (tls_type)
2712 || GOT_TLS_GD_P (tls_type))
2713 {
6de2ae4a 2714 s = htab->elf.sgot;
67a4f2b7
AO		 2715 h->got.offset = s->size;
2716 s->size += GOT_ENTRY_SIZE;
2717 if (GOT_TLS_GD_P (tls_type))
2718 s->size += GOT_ENTRY_SIZE;
2719 }
c434dee6 2720 dyn = htab->elf.dynamic_sections_created;
bffbf940 2721 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
aec6b87e
L		 2722 and two if global. R_X86_64_GOTTPOFF needs one dynamic
2723 relocation. No dynamic relocation against resolved undefined
2724 weak symbol in executable. */
67a4f2b7 2725 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
bffbf940 2726 || tls_type == GOT_TLS_IE)
351f65ca 2727 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7 2728 else if (GOT_TLS_GD_P (tls_type))
351f65ca 2729 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
67a4f2b7 2730 else if (! GOT_TLS_GDESC_P (tls_type)
aec6b87e
L		 2731 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2732 && !resolved_to_zero)
67a4f2b7 2733 || h->root.type != bfd_link_hash_undefweak)
0e1862bb 2734 && (bfd_link_pic (info)
27482721 2735 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
351f65ca 2736 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2737 if (GOT_TLS_GDESC_P (tls_type))
2738 {
351f65ca 2739 htab->elf.srelplt->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2740 htab->tlsdesc_plt = (bfd_vma) -1;
2741 }
c434dee6
AJ		 2742 }
2743 else
2744 h->got.offset = (bfd_vma) -1;
2745
c434dee6 2746 if (eh->dyn_relocs == NULL)
b34976b6 2747 return TRUE;
c434dee6
AJ		 2748
2749 /* In the shared -Bsymbolic case, discard space allocated for
2750 dynamic pc-relative relocs against symbols which turn out to be
2751 defined in regular objects. For the normal shared case, discard
2752 space for pc-relative relocs that have become local due to symbol
2753 visibility changes. */
2754
0e1862bb 2755 if (bfd_link_pic (info))
c434dee6 2756 {
27482721
AJ		 2757 /* Relocs that use pc_count are those that appear on a call
2758 insn, or certain REL relocs that can generated via assembly.
2759 We want calls to protected symbols to resolve directly to the
2760 function rather than going via the plt. If people want
2761 function pointer comparisons to work as expected then they
2762 should avoid writing weird assembly. */
2763 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6 2764 {
e03a8ed8 2765 struct elf_dyn_relocs **pp;
c434dee6
AJ		 2766
2767 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2768 {
c3ce498c
L		 2769 p->count -= p->pc_count;
2770 p->pc_count = 0;
c434dee6
AJ		 2771 if (p->count == 0)
2772 *pp = p->next;
2773 else
2774 pp = &p->next;
2775 }
2776 }
4e795f50
AM		 2777
2778 /* Also discard relocs on undefined weak syms with non-default
aec6b87e 2779 visibility or in PIE. */
31c0ebfe 2780 if (eh->dyn_relocs != NULL)
22d606e9 2781 {
31c0ebfe
L		 2782 if (h->root.type == bfd_link_hash_undefweak)
2783 {
aec6b87e
L		 2784 /* Undefined weak symbol is never bound locally in shared
2785 library. */
2786 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2787 || resolved_to_zero)
31c0ebfe 2788 eh->dyn_relocs = NULL;
31c0ebfe
L		 2789 else if (h->dynindx == -1
2790 && ! h->forced_local
2791 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2792 return FALSE;
2793 }
9d1d54d5
L		 2794 /* For PIE, discard space for pc-relative relocs against
2795 symbols which turn out to need copy relocs. */
0e1862bb 2796 else if (bfd_link_executable (info)
bc696fd5 2797 && (h->needs_copy || eh->needs_copy)
31c0ebfe
L		 2798 && h->def_dynamic
2799 && !h->def_regular)
9d1d54d5
L		 2800 {
2801 struct elf_dyn_relocs **pp;
2802
2803 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2804 {
2805 if (p->pc_count != 0)
2806 *pp = p->next;
2807 else
2808 pp = &p->next;
2809 }
2810 }
22d606e9 2811 }
d8045f23 2812 }
d40d037c 2813 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ		 2814 {
2815 /* For the non-shared case, discard space for relocs against
2816 symbols which turn out to need copy relocs or are not
04ebc307
L		 2817 dynamic. Keep dynamic relocations for run-time function
2818 pointer initialization. */
c434dee6 2819
aec6b87e
L		 2820 if ((!h->non_got_ref
2821 || eh->func_pointer_refcount > 0
2822 || (h->root.type == bfd_link_hash_undefweak
2823 && !resolved_to_zero))
f5385ebf
AM		 2824 && ((h->def_dynamic
2825 && !h->def_regular)
c434dee6
AJ		 2826 || (htab->elf.dynamic_sections_created
2827 && (h->root.type == bfd_link_hash_undefweak
2828 || h->root.type == bfd_link_hash_undefined))))
2829 {
2830 /* Make sure this symbol is output as a dynamic symbol.
2831 Undefined weak syms won't yet be marked as dynamic. */
2832 if (h->dynindx == -1
d8045f23 2833 && ! h->forced_local
aec6b87e 2834 && ! resolved_to_zero
d8045f23
NC		 2835 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2836 return FALSE;
c434dee6
AJ		 2837
2838 /* If that succeeded, we know we'll be keeping all the
2839 relocs. */
2840 if (h->dynindx != -1)
2841 goto keep;
2842 }
2843
2844 eh->dyn_relocs = NULL;
04ebc307 2845 eh->func_pointer_refcount = 0;
c434dee6
AJ		 2846
2847 keep: ;
2848 }
2849
2850 /* Finally, allocate space. */
2851 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2852 {
e7c33416
NC		 2853 asection * sreloc;
2854
cbe950e9 2855 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2856
2857 BFD_ASSERT (sreloc != NULL);
2858
351f65ca 2859 sreloc->size += p->count * bed->s->sizeof_rela;
c434dee6
AJ		 2860 }
2861
b34976b6 2862 return TRUE;
c434dee6
AJ		 2863}
2864
c25bc9fc
L		 2865/* Allocate space in .plt, .got and associated reloc sections for
2866 local dynamic relocs. */
2867
2868static bfd_boolean
351f65ca 2869elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
c25bc9fc
L		 2870{
2871 struct elf_link_hash_entry *h
2872 = (struct elf_link_hash_entry *) *slot;
2873
2874 if (h->type != STT_GNU_IFUNC
2875 || !h->def_regular
2876 || !h->ref_regular
2877 || !h->forced_local
2878 || h->root.type != bfd_link_hash_defined)
2879 abort ();
2880
351f65ca 2881 return elf_x86_64_allocate_dynrelocs (h, inf);
c25bc9fc
L		 2882}
2883
c434dee6
AJ		 2884/* Find any dynamic relocs that apply to read-only sections. */
2885
b34976b6 2886static bfd_boolean
351f65ca
L		 2887elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2888 void * inf)
c434dee6 2889{
351f65ca 2890 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2891 struct elf_dyn_relocs *p;
c434dee6 2892
aa715242
L		 2893 /* Skip local IFUNC symbols. */
2894 if (h->forced_local && h->type == STT_GNU_IFUNC)
2895 return TRUE;
2896
351f65ca 2897 eh = (struct elf_x86_64_link_hash_entry *) h;
c434dee6
AJ		 2898 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2899 {
2900 asection *s = p->sec->output_section;
2901
2902 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2903 {
2904 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2905
2906 info->flags |= DF_TEXTREL;
2907
0e1862bb 2908 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd
L		 2909 || info->error_textrel)
2910 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
b70321a2
L		 2911 p->sec->owner, h->root.root.string,
2912 p->sec);
2913
c434dee6 2914 /* Not an error, just cut short the traversal. */
b34976b6 2915 return FALSE;
c434dee6
AJ		 2916 }
2917 }
b34976b6 2918 return TRUE;
c434dee6
AJ		 2919}
2920
56ceb5b5 2921/* With the local symbol, foo, we convert
daa67607
L		 2922 mov foo@GOTPCREL(%rip), %reg
2923 to
2924 lea foo(%rip), %reg
56ceb5b5
L		 2925 and convert
2926 call/jmp *foo@GOTPCREL(%rip)
2927 to
2928 nop call foo/jmp foo nop
2929 When PIC is false, convert
2930 test %reg, foo@GOTPCREL(%rip)
2931 to
2932 test $foo, %reg
2933 and convert
2934 binop foo@GOTPCREL(%rip), %reg
2935 to
2936 binop $foo, %reg
2937 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
2938 instructions. */
daa67607
L		 2939
2940static bfd_boolean
56ceb5b5
L		 2941elf_x86_64_convert_load (bfd *abfd, asection *sec,
2942 struct bfd_link_info *link_info)
daa67607
L		 2943{
2944 Elf_Internal_Shdr *symtab_hdr;
2945 Elf_Internal_Rela *internal_relocs;
2946 Elf_Internal_Rela *irel, *irelend;
2947 bfd_byte *contents;
2948 struct elf_x86_64_link_hash_table *htab;
2949 bfd_boolean changed_contents;
2950 bfd_boolean changed_relocs;
2951 bfd_signed_vma *local_got_refcounts;
59cab532 2952 bfd_vma maxpagesize;
bae420ef
L		 2953 bfd_boolean is_pic;
2954 bfd_boolean require_reloc_pc32;
daa67607
L		 2955
2956 /* Don't even try to convert non-ELF outputs. */
2957 if (!is_elf_hash_table (link_info->hash))
2958 return FALSE;
2959
c1d11331 2960 /* Nothing to do if there is no need or no output. */
daa67607 2961 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
56ceb5b5 2962 || sec->need_convert_load == 0
c8831961 2963 || bfd_is_abs_section (sec->output_section))
daa67607
L		 2964 return TRUE;
2965
2966 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2967
2968 /* Load the relocations for this section. */
2969 internal_relocs = (_bfd_elf_link_read_relocs
2970 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2971 link_info->keep_memory));
2972 if (internal_relocs == NULL)
2973 return FALSE;
2974
2975 htab = elf_x86_64_hash_table (link_info);
2976 changed_contents = FALSE;
2977 changed_relocs = FALSE;
2978 local_got_refcounts = elf_local_got_refcounts (abfd);
59cab532 2979 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
daa67607
L		 2980
2981 /* Get the section contents. */
2982 if (elf_section_data (sec)->this_hdr.contents != NULL)
2983 contents = elf_section_data (sec)->this_hdr.contents;
2984 else
2985 {
2986 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2987 goto error_return;
2988 }
2989
bae420ef
L		 2990 is_pic = bfd_link_pic (link_info);
2991
2992 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
2993 --no-relax. */
2994 require_reloc_pc32
2995 = link_info->disable_target_specific_optimizations > 1;
2996
daa67607
L		 2997 irelend = internal_relocs + sec->reloc_count;
2998 for (irel = internal_relocs; irel < irelend; irel++)
2999 {
3000 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3001 unsigned int r_symndx = htab->r_sym (irel->r_info);
3002 unsigned int indx;
3003 struct elf_link_hash_entry *h;
59cab532
L		 3004 asection *tsec;
3005 char symtype;
3006 bfd_vma toff, roff;
56ceb5b5 3007 bfd_signed_vma raddend;
dfc87947 3008 unsigned int opcode;
56ceb5b5 3009 unsigned int modrm;
bae420ef
L		 3010 bfd_boolean relocx;
3011 bfd_boolean to_reloc_pc32;
daa67607 3012
bae420ef
L		 3013 relocx = (r_type == R_X86_64_GOTPCRELX
3014 || r_type == R_X86_64_REX_GOTPCRELX);
3015 if (!relocx && r_type != R_X86_64_GOTPCREL)
daa67607
L		 3016 continue;
3017
59cab532 3018 roff = irel->r_offset;
56ceb5b5
L		 3019 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
3020 continue;
59cab532 3021
56ceb5b5
L		 3022 raddend = irel->r_addend;
3023 /* Addend for 32-bit PC-relative relocation must be -4. */
3024 if (raddend != -4)
dfc87947
L		 3025 continue;
3026
3027 opcode = bfd_get_8 (abfd, contents + roff - 2);
3028
bae420ef 3029 /* Convert mov to lea since it has been done for a while. */
dfc87947 3030 if (opcode != 0x8b)
56ceb5b5
L		 3031 {
3032 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
bae420ef
L		 3033 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
3034 test, xor instructions. */
3035 if (!relocx)
56ceb5b5 3036 continue;
56ceb5b5 3037 }
59cab532 3038
bae420ef
L		 3039 /* We convert only to R_X86_64_PC32:
3040 1. Branch.
3041 2. R_X86_64_GOTPCREL since we can't modify REX byte.
3042 3. require_reloc_pc32 is true.
3043 4. PIC.
3044 */
3045 to_reloc_pc32 = (opcode == 0xff
3046 || !relocx
3047 || require_reloc_pc32
3048 || is_pic);
3049
daa67607
L		 3050 /* Get the symbol referred to by the reloc. */
3051 if (r_symndx < symtab_hdr->sh_info)
3052 {
3053 Elf_Internal_Sym *isym;
3054
3055 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3056 abfd, r_symndx);
3057
59cab532
L		 3058 symtype = ELF_ST_TYPE (isym->st_info);
3059
56ceb5b5
L		 3060 /* STT_GNU_IFUNC must keep GOTPCREL relocations and skip
3061 relocation against undefined symbols. */
77697d41
L		 3062 if (symtype == STT_GNU_IFUNC || isym->st_shndx == SHN_UNDEF)
3063 continue;
59cab532 3064
77697d41
L		 3065 if (isym->st_shndx == SHN_ABS)
3066 tsec = bfd_abs_section_ptr;
3067 else if (isym->st_shndx == SHN_COMMON)
3068 tsec = bfd_com_section_ptr;
3069 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
3070 tsec = &_bfd_elf_large_com_section;
3071 else
3072 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3073
3074 h = NULL;
3075 toff = isym->st_value;
59cab532
L		 3076 }
3077 else
3078 {
3079 indx = r_symndx - symtab_hdr->sh_info;
3080 h = elf_sym_hashes (abfd)[indx];
3081 BFD_ASSERT (h != NULL);
3082
3083 while (h->root.type == bfd_link_hash_indirect
3084 || h->root.type == bfd_link_hash_warning)
3085 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3086
56ceb5b5
L		 3087 /* STT_GNU_IFUNC must keep GOTPCREL relocations. We also
3088 avoid optimizing GOTPCREL relocations againt _DYNAMIC
3089 since ld.so may use its link-time address. */
bae420ef
L		 3090 if (h->type == STT_GNU_IFUNC)
3091 continue;
3092
3093 /* Undefined weak symbol is only bound locally in executable
3094 and its reference is resolved as 0 without relocation
3095 overflow. We can only perform this optimization for
3096 GOTPCRELX relocations since we need to modify REX byte.
3097 It is OK convert mov with R_X86_64_GOTPCREL to
3098 R_X86_64_PC32. */
3099 if ((relocx || opcode == 0x8b)
3100 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
3101 elf_x86_64_hash_entry (h)))
3102 {
3103 if (opcode == 0xff)
3104 {
3105 /* Skip for branch instructions since R_X86_64_PC32
3106 may overflow. */
3107 if (require_reloc_pc32)
3108 continue;
3109 }
3110 else if (relocx)
3111 {
3112 /* For non-branch instructions, we can convert to
3113 R_X86_64_32/R_X86_64_32S since we know if there
3114 is a REX byte. */
3115 to_reloc_pc32 = FALSE;
3116 }
3117
3118 /* Since we don't know the current PC when PIC is true,
3119 we can't convert to R_X86_64_PC32. */
3120 if (to_reloc_pc32 && is_pic)
3121 continue;
3122
3123 goto convert;
3124 }
3125 else if ((h->def_regular
3126 || h->root.type == bfd_link_hash_defined
3127 || h->root.type == bfd_link_hash_defweak)
3128 && h != htab->elf.hdynamic
3129 && SYMBOL_REFERENCES_LOCAL (link_info, h))
7b7e7f1d 3130 {
ead3d542 3131 /* bfd_link_hash_new or bfd_link_hash_undefined is
bae420ef
L		 3132 set by an assignment in a linker script in
3133 bfd_elf_record_link_assignment. */
ead3d542
L		 3134 if (h->def_regular
3135 && (h->root.type == bfd_link_hash_new
3136 || h->root.type == bfd_link_hash_undefined))
bae420ef
L		 3137 {
3138 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
3139 if (require_reloc_pc32)
3140 continue;
3141 goto convert;
3142 }
7b7e7f1d
L		 3143 tsec = h->root.u.def.section;
3144 toff = h->root.u.def.value;
3145 symtype = h->type;
3146 }
77697d41
L		 3147 else
3148 continue;
59cab532
L		 3149 }
3150
bae420ef
L		 3151 /* We can only estimate relocation overflow for R_X86_64_PC32. */
3152 if (!to_reloc_pc32)
3153 goto convert;
3154
59cab532
L		 3155 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
3156 {
3157 /* At this stage in linking, no SEC_MERGE symbol has been
3158 adjusted, so all references to such symbols need to be
3159 passed through _bfd_merged_section_offset. (Later, in
3160 relocate_section, all SEC_MERGE symbols *except* for
3161 section symbols have been adjusted.)
3162
3163 gas may reduce relocations against symbols in SEC_MERGE
3164 sections to a relocation against the section symbol when
3165 the original addend was zero. When the reloc is against
3166 a section symbol we should include the addend in the
3167 offset passed to _bfd_merged_section_offset, since the
3168 location of interest is the original symbol. On the
3169 other hand, an access to "sym+addend" where "sym" is not
3170 a section symbol should not include the addend; Such an
3171 access is presumed to be an offset from "sym"; The
3172 location of interest is just "sym". */
3173 if (symtype == STT_SECTION)
56ceb5b5 3174 toff += raddend;
59cab532
L		 3175
3176 toff = _bfd_merged_section_offset (abfd, &tsec,
3177 elf_section_data (tsec)->sec_info,
3178 toff);
3179
3180 if (symtype != STT_SECTION)
56ceb5b5 3181 toff += raddend;
59cab532
L		 3182 }
3183 else
56ceb5b5 3184 toff += raddend;
59cab532
L		 3185
3186 /* Don't convert if R_X86_64_PC32 relocation overflows. */
3187 if (tsec->output_section == sec->output_section)
3188 {
3189 if ((toff - roff + 0x80000000) > 0xffffffff)
3190 continue;
3191 }
3192 else
3193 {
4a539596 3194 bfd_signed_vma distance;
59cab532
L		 3195
3196 /* At this point, we don't know the load addresses of TSEC
3197 section nor SEC section. We estimate the distrance between
fb06f1c0 3198 SEC and TSEC. We store the estimated distances in the
4a539596
L		 3199 compressed_size field of the output section, which is only
3200 used to decompress the compressed input section. */
3201 if (sec->output_section->compressed_size == 0)
59cab532 3202 {
4a539596
L		 3203 asection *asect;
3204 bfd_size_type size = 0;
3205 for (asect = link_info->output_bfd->sections;
3206 asect != NULL;
3207 asect = asect->next)
91f8bf69
L		 3208 /* Skip debug sections since compressed_size is used to
3209 compress debug sections. */
3210 if ((asect->flags & SEC_DEBUGGING) == 0)
3211 {
3212 asection *i;
3213 for (i = asect->map_head.s;
3214 i != NULL;
3215 i = i->map_head.s)
3216 {
3217 size = align_power (size, i->alignment_power);
3218 size += i->size;
3219 }
3220 asect->compressed_size = size;
3221 }
daa67607 3222 }
59cab532 3223
56ceb5b5
L		 3224 /* Don't convert GOTPCREL relocations if TSEC isn't placed
3225 after SEC. */
4a539596
L		 3226 distance = (tsec->output_section->compressed_size
3227 - sec->output_section->compressed_size);
3228 if (distance < 0)
59cab532
L		 3229 continue;
3230
3231 /* Take PT_GNU_RELRO segment into account by adding
3232 maxpagesize. */
4a539596 3233 if ((toff + distance + maxpagesize - roff + 0x80000000)
59cab532
L		 3234 > 0xffffffff)
3235 continue;
daa67607
L		 3236 }
3237
7b7e7f1d 3238convert:
56ceb5b5
L		 3239 if (opcode == 0xff)
3240 {
3241 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
3242 unsigned int nop;
caa65211 3243 unsigned int disp;
56ceb5b5
L		 3244 bfd_vma nop_offset;
3245
3246 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
3247 R_X86_64_PC32. */
3248 modrm = bfd_get_8 (abfd, contents + roff - 1);
3249 if (modrm == 0x25)
3250 {
56ceb5b5
L		 3251 /* Convert to "jmp foo nop". */
3252 modrm = 0xe9;
3253 nop = NOP_OPCODE;
3254 nop_offset = irel->r_offset + 3;
3255 disp = bfd_get_32 (abfd, contents + irel->r_offset);
3256 irel->r_offset -= 1;
3257 bfd_put_32 (abfd, disp, contents + irel->r_offset);
3258 }
3259 else
3260 {
3261 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
3262 is a nop prefix. */
3263 modrm = 0xe8;
caa65211
L		 3264 nop = link_info->call_nop_byte;
3265 if (link_info->call_nop_as_suffix)
3266 {
3267 nop_offset = irel->r_offset + 3;
3268 disp = bfd_get_32 (abfd, contents + irel->r_offset);
3269 irel->r_offset -= 1;
3270 bfd_put_32 (abfd, disp, contents + irel->r_offset);
3271 }
3272 else
3273 nop_offset = irel->r_offset - 2;
56ceb5b5
L		 3274 }
3275 bfd_put_8 (abfd, nop, contents + nop_offset);
3276 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
3277 r_type = R_X86_64_PC32;
3278 }
3279 else
3280 {
bae420ef
L		 3281 unsigned int rex;
3282 unsigned int rex_mask = REX_R;
3283
3284 if (r_type == R_X86_64_REX_GOTPCRELX)
3285 rex = bfd_get_8 (abfd, contents + roff - 3);
3286 else
3287 rex = 0;
3288
56ceb5b5
L		 3289 if (opcode == 0x8b)
3290 {
bae420ef
L		 3291 if (to_reloc_pc32)
3292 {
3293 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
3294 "lea foo(%rip), %reg". */
3295 opcode = 0x8d;
3296 r_type = R_X86_64_PC32;
3297 }
3298 else
3299 {
3300 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
3301 "mov $foo, %reg". */
3302 opcode = 0xc7;
3303 modrm = bfd_get_8 (abfd, contents + roff - 1);
3304 modrm = 0xc0 | (modrm & 0x38) >> 3;
3305 if ((rex & REX_W) != 0
3306 && ABI_64_P (link_info->output_bfd))
3307 {
3308 /* Keep the REX_W bit in REX byte for LP64. */
3309 r_type = R_X86_64_32S;
3310 goto rewrite_modrm_rex;
3311 }
3312 else
3313 {
3314 /* If the REX_W bit in REX byte isn't needed,
3315 use R_X86_64_32 and clear the W bit to avoid
3316 sign-extend imm32 to imm64. */
3317 r_type = R_X86_64_32;
3318 /* Clear the W bit in REX byte. */
3319 rex_mask |= REX_W;
3320 goto rewrite_modrm_rex;
3321 }
3322 }
56ceb5b5
L		 3323 }
3324 else
3325 {
bae420ef
L		 3326 /* R_X86_64_PC32 isn't supported. */
3327 if (to_reloc_pc32)
3328 continue;
3329
56ceb5b5
L		 3330 modrm = bfd_get_8 (abfd, contents + roff - 1);
3331 if (opcode == 0x85)
3332 {
3333 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
3334 "test $foo, %reg". */
3335 modrm = 0xc0 | (modrm & 0x38) >> 3;
3336 opcode = 0xf7;
3337 }
3338 else
3339 {
3340 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
3341 "binop $foo, %reg". */
3342 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
3343 opcode = 0x81;
3344 }
bae420ef
L		 3345
3346 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
3347 overflow when sign-extending imm32 to imm64. */
3348 r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32;
3349
3350rewrite_modrm_rex:
56ceb5b5
L		 3351 bfd_put_8 (abfd, modrm, contents + roff - 1);
3352
bae420ef 3353 if (rex)
56ceb5b5
L		 3354 {
3355 /* Move the R bit to the B bit in REX byte. */
bae420ef 3356 rex = (rex & ~rex_mask) | (rex & REX_R) >> 2;
56ceb5b5
L		 3357 bfd_put_8 (abfd, rex, contents + roff - 3);
3358 }
bae420ef
L		 3359
3360 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
56ceb5b5 3361 irel->r_addend = 0;
56ceb5b5
L		 3362 }
3363
3364 bfd_put_8 (abfd, opcode, contents + roff - 2);
3365 }
3366
3367 irel->r_info = htab->r_info (r_symndx, r_type);
59cab532
L		 3368 changed_contents = TRUE;
3369 changed_relocs = TRUE;
3370
77697d41 3371 if (h)
59cab532 3372 {
77697d41
L		 3373 if (h->got.refcount > 0)
3374 h->got.refcount -= 1;
59cab532
L		 3375 }
3376 else
daa67607 3377 {
77697d41
L		 3378 if (local_got_refcounts != NULL
3379 && local_got_refcounts[r_symndx] > 0)
3380 local_got_refcounts[r_symndx] -= 1;
daa67607
L		 3381 }
3382 }
3383
3384 if (contents != NULL
3385 && elf_section_data (sec)->this_hdr.contents != contents)
3386 {
3387 if (!changed_contents && !link_info->keep_memory)
3388 free (contents);
3389 else
3390 {
3391 /* Cache the section contents for elf_link_input_bfd. */
3392 elf_section_data (sec)->this_hdr.contents = contents;
3393 }
3394 }
3395
3396 if (elf_section_data (sec)->relocs != internal_relocs)
3397 {
3398 if (!changed_relocs)
3399 free (internal_relocs);
3400 else
3401 elf_section_data (sec)->relocs = internal_relocs;
3402 }
3403
3404 return TRUE;
3405
3406 error_return:
3407 if (contents != NULL
3408 && elf_section_data (sec)->this_hdr.contents != contents)
3409 free (contents);
3410 if (internal_relocs != NULL
3411 && elf_section_data (sec)->relocs != internal_relocs)
3412 free (internal_relocs);
3413 return FALSE;
3414}
3415
70256ad8
AJ		 3416/* Set the sizes of the dynamic sections. */
3417
b34976b6 3418static bfd_boolean
351f65ca
L		 3419elf_x86_64_size_dynamic_sections (bfd *output_bfd,
3420 struct bfd_link_info *info)
70256ad8 3421{
351f65ca 3422 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 3423 bfd *dynobj;
3424 asection *s;
b34976b6 3425 bfd_boolean relocs;
c434dee6 3426 bfd *ibfd;
351f65ca 3427 const struct elf_backend_data *bed;
70256ad8 3428
351f65ca 3429 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3430 if (htab == NULL)
3431 return FALSE;
351f65ca 3432 bed = get_elf_backend_data (output_bfd);
4dfe6ac6 3433
c434dee6
AJ		 3434 dynobj = htab->elf.dynobj;
3435 if (dynobj == NULL)
3436 abort ();
70256ad8 3437
c434dee6 3438 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 3439 {
3440 /* Set the contents of the .interp section to the interpreter. */
9b8b325a 3441 if (bfd_link_executable (info) && !info->nointerp)
70256ad8 3442 {
3d4d4302 3443 s = bfd_get_linker_section (dynobj, ".interp");
c434dee6
AJ		 3444 if (s == NULL)
3445 abort ();
351f65ca
L		 3446 s->size = htab->dynamic_interpreter_size;
3447 s->contents = (unsigned char *) htab->dynamic_interpreter;
aec6b87e 3448 htab->interp = s;
70256ad8
AJ		 3449 }
3450 }
70256ad8 3451
c434dee6
AJ		 3452 /* Set up .got offsets for local syms, and space for local dynamic
3453 relocs. */
c72f2fb2 3454 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
70256ad8 3455 {
c434dee6
AJ		 3456 bfd_signed_vma *local_got;
3457 bfd_signed_vma *end_local_got;
bffbf940 3458 char *local_tls_type;
67a4f2b7 3459 bfd_vma *local_tlsdesc_gotent;
c434dee6
AJ		 3460 bfd_size_type locsymcount;
3461 Elf_Internal_Shdr *symtab_hdr;
3462 asection *srel;
70256ad8 3463
0ffa91dd 3464 if (! is_x86_64_elf (ibfd))
70256ad8
AJ		 3465 continue;
3466
c434dee6 3467 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 3468 {
e03a8ed8 3469 struct elf_dyn_relocs *p;
c434dee6 3470
56ceb5b5 3471 if (!elf_x86_64_convert_load (ibfd, s, info))
daa67607
L		 3472 return FALSE;
3473
e03a8ed8 3474 for (p = (struct elf_dyn_relocs *)
e81d3500 3475 (elf_section_data (s)->local_dynrel);
c434dee6
AJ		 3476 p != NULL;
3477 p = p->next)
70256ad8 3478 {
c434dee6
AJ		 3479 if (!bfd_is_abs_section (p->sec)
3480 && bfd_is_abs_section (p->sec->output_section))
3481 {
3482 /* Input section has been discarded, either because
3483 it is a copy of a linkonce section or due to
3484 linker script /DISCARD/, so we'll be discarding
3485 the relocs too. */
3486 }
3487 else if (p->count != 0)
3488 {
3489 srel = elf_section_data (p->sec)->sreloc;
351f65ca 3490 srel->size += p->count * bed->s->sizeof_rela;
4b819e1f
L		 3491 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3492 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 3493 {
3494 info->flags |= DF_TEXTREL;
0e1862bb 3495 if ((info->warn_shared_textrel && bfd_link_pic (info))
1952c5cd
L		 3496 || info->error_textrel)
3497 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
b70321a2 3498 p->sec->owner, p->sec);
b70321a2 3499 }
c434dee6 3500 }
70256ad8
AJ		 3501 }
3502 }
c434dee6
AJ		 3503
3504 local_got = elf_local_got_refcounts (ibfd);
3505 if (!local_got)
3506 continue;
3507
0ffa91dd 3508 symtab_hdr = &elf_symtab_hdr (ibfd);
c434dee6
AJ		 3509 locsymcount = symtab_hdr->sh_info;
3510 end_local_got = local_got + locsymcount;
351f65ca
L		 3511 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
3512 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 3513 s = htab->elf.sgot;
3514 srel = htab->elf.srelgot;
67a4f2b7
AO		 3515 for (; local_got < end_local_got;
3516 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
70256ad8 3517 {
67a4f2b7 3518 *local_tlsdesc_gotent = (bfd_vma) -1;
c434dee6 3519 if (*local_got > 0)
70256ad8 3520 {
67a4f2b7
AO		 3521 if (GOT_TLS_GDESC_P (*local_tls_type))
3522 {
6de2ae4a 3523 *local_tlsdesc_gotent = htab->elf.sgotplt->size
351f65ca 3524 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 3525 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 3526 *local_got = (bfd_vma) -2;
3527 }
3528 if (! GOT_TLS_GDESC_P (*local_tls_type)
3529 || GOT_TLS_GD_P (*local_tls_type))
3530 {
3531 *local_got = s->size;
3532 s->size += GOT_ENTRY_SIZE;
3533 if (GOT_TLS_GD_P (*local_tls_type))
3534 s->size += GOT_ENTRY_SIZE;
3535 }
0e1862bb 3536 if (bfd_link_pic (info)
67a4f2b7 3537 || GOT_TLS_GD_ANY_P (*local_tls_type)
bffbf940 3538 || *local_tls_type == GOT_TLS_IE)
67a4f2b7
AO		 3539 {
3540 if (GOT_TLS_GDESC_P (*local_tls_type))
3541 {
6de2ae4a 3542 htab->elf.srelplt->size
351f65ca 3543 += bed->s->sizeof_rela;
67a4f2b7
AO		 3544 htab->tlsdesc_plt = (bfd_vma) -1;
3545 }
3546 if (! GOT_TLS_GDESC_P (*local_tls_type)
3547 || GOT_TLS_GD_P (*local_tls_type))
351f65ca 3548 srel->size += bed->s->sizeof_rela;
67a4f2b7 3549 }
70256ad8
AJ		 3550 }
3551 else
c434dee6
AJ		 3552 *local_got = (bfd_vma) -1;
3553 }
3554 }
70256ad8 3555
bffbf940
JJ		 3556 if (htab->tls_ld_got.refcount > 0)
3557 {
3558 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3559 relocs. */
6de2ae4a
L		 3560 htab->tls_ld_got.offset = htab->elf.sgot->size;
3561 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
351f65ca 3562 htab->elf.srelgot->size += bed->s->sizeof_rela;
bffbf940
JJ		 3563 }
3564 else
3565 htab->tls_ld_got.offset = -1;
3566
c434dee6
AJ		 3567 /* Allocate global sym .plt and .got entries, and space for global
3568 sym dynamic relocs. */
351f65ca 3569 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
eb4ff4d6 3570 info);
c434dee6 3571
c25bc9fc
L		 3572 /* Allocate .plt and .got entries, and space for local symbols. */
3573 htab_traverse (htab->loc_hash_table,
351f65ca 3574 elf_x86_64_allocate_local_dynrelocs,
c25bc9fc
L		 3575 info);
3576
67a4f2b7
AO		 3577 /* For every jump slot reserved in the sgotplt, reloc_count is
3578 incremented. However, when we reserve space for TLS descriptors,
3579 it's not incremented, so in order to compute the space reserved
3580 for them, it suffices to multiply the reloc count by the jump
e1f98742
L		 3581 slot size.
3582
3583 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3584 so that R_X86_64_IRELATIVE entries come last. */
6de2ae4a 3585 if (htab->elf.srelplt)
e1f98742
L		 3586 {
3587 htab->sgotplt_jump_table_size
3588 = elf_x86_64_compute_jump_table_size (htab);
3589 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3590 }
3591 else if (htab->elf.irelplt)
3592 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
67a4f2b7
AO		 3593
3594 if (htab->tlsdesc_plt)
3595 {
3596 /* If we're not using lazy TLS relocations, don't generate the
3597 PLT and GOT entries they require. */
3598 if ((info->flags & DF_BIND_NOW))
3599 htab->tlsdesc_plt = 0;
3600 else
3601 {
6de2ae4a
L		 3602 htab->tlsdesc_got = htab->elf.sgot->size;
3603 htab->elf.sgot->size += GOT_ENTRY_SIZE;
67a4f2b7
AO		 3604 /* Reserve room for the initial entry.
3605 FIXME: we could probably do away with it in this case. */
6de2ae4a 3606 if (htab->elf.splt->size == 0)
eed180f8 3607 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
6de2ae4a 3608 htab->tlsdesc_plt = htab->elf.splt->size;
eed180f8 3609 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
67a4f2b7
AO		 3610 }
3611 }
3612
a7b16ceb
L		 3613 if (htab->elf.sgotplt)
3614 {
3615 /* Don't allocate .got.plt section if there are no GOT nor PLT
eed180f8 3616 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 3617 if ((htab->elf.hgot == NULL
3618 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 3619 && (htab->elf.sgotplt->size
3620 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 3621 && (htab->elf.splt == NULL
3622 || htab->elf.splt->size == 0)
3623 && (htab->elf.sgot == NULL
3624 || htab->elf.sgot->size == 0)
3625 && (htab->elf.iplt == NULL
3626 || htab->elf.iplt->size == 0)
3627 && (htab->elf.igotplt == NULL
3628 || htab->elf.igotplt->size == 0))
3629 htab->elf.sgotplt->size = 0;
3630 }
3631
9a2a56cc
AM		 3632 if (htab->plt_eh_frame != NULL
3633 && htab->elf.splt != NULL
3634 && htab->elf.splt->size != 0
3635 && !bfd_is_abs_section (htab->elf.splt->output_section)
3636 && _bfd_elf_eh_frame_present (info))
3637 {
3638 const struct elf_x86_64_backend_data *arch_data
f8222080 3639 = get_elf_x86_64_arch_data (bed);
9a2a56cc
AM		 3640 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
3641 }
3642
c434dee6
AJ		 3643 /* We now have determined the sizes of the various dynamic sections.
3644 Allocate memory for them. */
b34976b6 3645 relocs = FALSE;
c434dee6
AJ		 3646 for (s = dynobj->sections; s != NULL; s = s->next)
3647 {
3648 if ((s->flags & SEC_LINKER_CREATED) == 0)
3649 continue;
3650
6de2ae4a
L		 3651 if (s == htab->elf.splt
3652 || s == htab->elf.sgot
3653 || s == htab->elf.sgotplt
3654 || s == htab->elf.iplt
3655 || s == htab->elf.igotplt
0ff2b86e 3656 || s == htab->plt_bnd
dd7e64d4 3657 || s == htab->plt_got
9a2a56cc 3658 || s == htab->plt_eh_frame
75ff4589 3659 || s == htab->sdynbss)
c434dee6
AJ		 3660 {
3661 /* Strip this section if we don't need it; see the
3662 comment below. */
3663 }
0112cd26 3664 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
c434dee6 3665 {
6de2ae4a 3666 if (s->size != 0 && s != htab->elf.srelplt)
b34976b6 3667 relocs = TRUE;
c434dee6
AJ		 3668
3669 /* We use the reloc_count field as a counter if we need
3670 to copy relocs into the output file. */
6de2ae4a 3671 if (s != htab->elf.srelplt)
67a4f2b7 3672 s->reloc_count = 0;
70256ad8 3673 }
c434dee6 3674 else
70256ad8
AJ		 3675 {
3676 /* It's not one of our sections, so don't allocate space. */
3677 continue;
3678 }
3679
eea6121a 3680 if (s->size == 0)
70256ad8 3681 {
c434dee6
AJ		 3682 /* If we don't need this section, strip it from the
3683 output file. This is mostly to handle .rela.bss and
3684 .rela.plt. We must create both sections in
3685 create_dynamic_sections, because they must be created
3686 before the linker maps input sections to output
3687 sections. The linker does that before
3688 adjust_dynamic_symbol is called, and it is that
3689 function which decides whether anything needs to go
3690 into these sections. */
3691
8423293d 3692 s->flags |= SEC_EXCLUDE;
70256ad8
AJ		 3693 continue;
3694 }
3695
c456f082
AM		 3696 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3697 continue;
3698
70256ad8
AJ		 3699 /* Allocate memory for the section contents. We use bfd_zalloc
3700 here in case unused entries are not reclaimed before the
3701 section's contents are written out. This should not happen,
3702 but this way if it does, we get a R_X86_64_NONE reloc instead
3703 of garbage. */
eea6121a 3704 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
c434dee6 3705 if (s->contents == NULL)
b34976b6 3706 return FALSE;
70256ad8
AJ		 3707 }
3708
e41b3a13 3709 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 3710 && htab->plt_eh_frame->contents != NULL)
3711 {
3712 const struct elf_x86_64_backend_data *arch_data
f8222080 3713 = get_elf_x86_64_arch_data (bed);
9a2a56cc
AM		 3714
3715 memcpy (htab->plt_eh_frame->contents,
3716 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3717 bfd_put_32 (dynobj, htab->elf.splt->size,
3718 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3719 }
e41b3a13 3720
c434dee6 3721 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 3722 {
3723 /* Add some entries to the .dynamic section. We fill in the
351f65ca 3724 values later, in elf_x86_64_finish_dynamic_sections, but we
70256ad8 3725 must add the entries now so that we get the correct size for
407443a3 3726 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 3727 dynamic linker and used by the debugger. */
dc810e39 3728#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3729 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3730
0e1862bb 3731 if (bfd_link_executable (info))
70256ad8 3732 {
dc810e39 3733 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3734 return FALSE;
70256ad8
AJ		 3735 }
3736
6de2ae4a 3737 if (htab->elf.splt->size != 0)
70256ad8 3738 {
7c1e8d3e
L		 3739 /* DT_PLTGOT is used by prelink even if there is no PLT
3740 relocation. */
3741 if (!add_dynamic_entry (DT_PLTGOT, 0))
b34976b6 3742 return FALSE;
67a4f2b7 3743
7c1e8d3e
L		 3744 if (htab->elf.srelplt->size != 0)
3745 {
3746 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3747 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3748 || !add_dynamic_entry (DT_JMPREL, 0))
3749 return FALSE;
3750 }
3751
67a4f2b7
AO		 3752 if (htab->tlsdesc_plt
3753 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3754 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3755 return FALSE;
70256ad8
AJ		 3756 }
3757
3758 if (relocs)
3759 {
dc810e39
AM		 3760 if (!add_dynamic_entry (DT_RELA, 0)
3761 || !add_dynamic_entry (DT_RELASZ, 0)
351f65ca 3762 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
b34976b6 3763 return FALSE;
70256ad8 3764
c434dee6
AJ		 3765 /* If any dynamic relocs apply to a read-only section,
3766 then we need a DT_TEXTREL entry. */
3767 if ((info->flags & DF_TEXTREL) == 0)
eed180f8 3768 elf_link_hash_traverse (&htab->elf,
351f65ca 3769 elf_x86_64_readonly_dynrelocs,
eb4ff4d6 3770 info);
c434dee6
AJ		 3771
3772 if ((info->flags & DF_TEXTREL) != 0)
3773 {
2df3368d 3774 if (htab->readonly_dynrelocs_against_ifunc)
8efa2874
L		 3775 {
3776 info->callbacks->einfo
3777 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3778 bfd_set_error (bfd_error_bad_value);
3779 return FALSE;
3780 }
3781
c434dee6 3782 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3783 return FALSE;
c434dee6 3784 }
70256ad8
AJ		 3785 }
3786 }
dc810e39 3787#undef add_dynamic_entry
70256ad8 3788
b34976b6 3789 return TRUE;
70256ad8
AJ		 3790}
3791
67a4f2b7 3792static bfd_boolean
351f65ca
L		 3793elf_x86_64_always_size_sections (bfd *output_bfd,
3794 struct bfd_link_info *info)
67a4f2b7
AO		 3795{
3796 asection *tls_sec = elf_hash_table (info)->tls_sec;
3797
3798 if (tls_sec)
3799 {
3800 struct elf_link_hash_entry *tlsbase;
3801
3802 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3803 "_TLS_MODULE_BASE_",
3804 FALSE, FALSE, FALSE);
3805
3806 if (tlsbase && tlsbase->type == STT_TLS)
3807 {
351f65ca 3808 struct elf_x86_64_link_hash_table *htab;
67a4f2b7
AO		 3809 struct bfd_link_hash_entry *bh = NULL;
3810 const struct elf_backend_data *bed
3811 = get_elf_backend_data (output_bfd);
3812
351f65ca 3813 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3814 if (htab == NULL)
3815 return FALSE;
3816
67a4f2b7
AO		 3817 if (!(_bfd_generic_link_add_one_symbol
3818 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3819 tls_sec, 0, NULL, FALSE,
3820 bed->collect, &bh)))
3821 return FALSE;
9f03412a 3822
4dfe6ac6 3823 htab->tls_module_base = bh;
9f03412a 3824
67a4f2b7
AO		 3825 tlsbase = (struct elf_link_hash_entry *)bh;
3826 tlsbase->def_regular = 1;
3827 tlsbase->other = STV_HIDDEN;
576fa883 3828 tlsbase->root.linker_def = 1;
67a4f2b7
AO		 3829 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3830 }
3831 }
3832
3833 return TRUE;
3834}
3835
9f03412a
AO		 3836/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3837 executables. Rather than setting it to the beginning of the TLS
3838 section, we have to set it to the end. This function may be called
3839 multiple times, it is idempotent. */
3840
3841static void
351f65ca 3842elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3843{
351f65ca 3844 struct elf_x86_64_link_hash_table *htab;
9f03412a
AO		 3845 struct bfd_link_hash_entry *base;
3846
0e1862bb 3847 if (!bfd_link_executable (info))
9f03412a
AO		 3848 return;
3849
351f65ca 3850 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3851 if (htab == NULL)
3852 return;
9f03412a 3853
4dfe6ac6
NC		 3854 base = htab->tls_module_base;
3855 if (base == NULL)
9f03412a
AO		 3856 return;
3857
4dfe6ac6 3858 base->u.def.value = htab->elf.tls_size;
9f03412a
AO		 3859}
3860
bffbf940
JJ		 3861/* Return the base VMA address which should be subtracted from real addresses
3862 when resolving @dtpoff relocation.
3863 This is PT_TLS segment p_vaddr. */
3864
3865static bfd_vma
351f65ca 3866elf_x86_64_dtpoff_base (struct bfd_link_info *info)
bffbf940 3867{
e1918d23
AM		 3868 /* If tls_sec is NULL, we should have signalled an error already. */
3869 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 3870 return 0;
e1918d23 3871 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ		 3872}
3873
3874/* Return the relocation value for @tpoff relocation
3875 if STT_TLS virtual address is ADDRESS. */
3876
3877static bfd_vma
351f65ca 3878elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 3879{
e1918d23 3880 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3881 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3882 bfd_vma static_tls_size;
bffbf940
JJ		 3883
3884 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 3885 if (htab->tls_sec == NULL)
bffbf940 3886 return 0;
7dc98aea
RO		 3887
3888 /* Consider special static TLS alignment requirements. */
3889 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3890 return address - static_tls_size - htab->tls_sec->vma;
bffbf940
JJ		 3891}
3892
90f487df
L		 3893/* Is the instruction before OFFSET in CONTENTS a 32bit relative
3894 branch? */
3895
3896static bfd_boolean
3897is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3898{
3899 /* Opcode Instruction
3900 0xe8 call
3901 0xe9 jump
3902 0x0f 0x8x conditional jump */
3903 return ((offset > 0
3904 && (contents [offset - 1] == 0xe8
3905 || contents [offset - 1] == 0xe9))
3906 || (offset > 1
3907 && contents [offset - 2] == 0x0f
3908 && (contents [offset - 1] & 0xf0) == 0x80));
3909}
3910
8d88c4ca
NC		 3911/* Relocate an x86_64 ELF section. */
3912
b34976b6 3913static bfd_boolean
351f65ca
L		 3914elf_x86_64_relocate_section (bfd *output_bfd,
3915 struct bfd_link_info *info,
3916 bfd *input_bfd,
3917 asection *input_section,
3918 bfd_byte *contents,
3919 Elf_Internal_Rela *relocs,
3920 Elf_Internal_Sym *local_syms,
3921 asection **local_sections)
8d88c4ca 3922{
351f65ca 3923 struct elf_x86_64_link_hash_table *htab;
8d88c4ca
NC		 3924 Elf_Internal_Shdr *symtab_hdr;
3925 struct elf_link_hash_entry **sym_hashes;
3926 bfd_vma *local_got_offsets;
67a4f2b7 3927 bfd_vma *local_tlsdesc_gotents;
c434dee6 3928 Elf_Internal_Rela *rel;
60f2e42e 3929 Elf_Internal_Rela *wrel;
8d88c4ca 3930 Elf_Internal_Rela *relend;
eed180f8 3931 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
8d88c4ca 3932
0ffa91dd
NC		 3933 BFD_ASSERT (is_x86_64_elf (input_bfd));
3934
338c190a
L		 3935 /* Skip if check_relocs failed. */
3936 if (input_section->check_relocs_failed)
3937 return FALSE;
3938
351f65ca 3939 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3940 if (htab == NULL)
3941 return FALSE;
0ffa91dd 3942 symtab_hdr = &elf_symtab_hdr (input_bfd);
8d88c4ca
NC		 3943 sym_hashes = elf_sym_hashes (input_bfd);
3944 local_got_offsets = elf_local_got_offsets (input_bfd);
351f65ca 3945 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
8d88c4ca 3946
351f65ca 3947 elf_x86_64_set_tls_module_base (info);
9f03412a 3948
60f2e42e 3949 rel = wrel = relocs;
8d88c4ca 3950 relend = relocs + input_section->reloc_count;
60f2e42e 3951 for (; rel < relend; wrel++, rel++)
8d88c4ca 3952 {
bffbf940 3953 unsigned int r_type;
8d88c4ca
NC		 3954 reloc_howto_type *howto;
3955 unsigned long r_symndx;
3956 struct elf_link_hash_entry *h;
0ff2b86e 3957 struct elf_x86_64_link_hash_entry *eh;
8d88c4ca
NC		 3958 Elf_Internal_Sym *sym;
3959 asection *sec;
0ff2b86e 3960 bfd_vma off, offplt, plt_offset;
8d88c4ca 3961 bfd_vma relocation;
b34976b6 3962 bfd_boolean unresolved_reloc;
8d88c4ca 3963 bfd_reloc_status_type r;
bffbf940 3964 int tls_type;
0ff2b86e 3965 asection *base_got, *resolved_plt;
1788fc08 3966 bfd_vma st_size;
aec6b87e 3967 bfd_boolean resolved_to_zero;
8d88c4ca 3968
351f65ca 3969 r_type = ELF32_R_TYPE (rel->r_info);
fe4770f4
AJ		 3970 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3971 || r_type == (int) R_X86_64_GNU_VTENTRY)
18954b29
L		 3972 {
3973 if (wrel != rel)
3974 *wrel = *rel;
3975 continue;
3976 }
8d88c4ca 3977
9911c0fc 3978 if (r_type >= (int) R_X86_64_standard)
8da6118f 3979 {
9911c0fc
L		 3980 (*_bfd_error_handler)
3981 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3982 input_bfd, input_section, r_type);
8da6118f 3983 bfd_set_error (bfd_error_bad_value);
b34976b6 3984 return FALSE;
8da6118f 3985 }
8d88c4ca 3986
d7921315 3987 if (r_type != (int) R_X86_64_32
eed180f8 3988 || ABI_64_P (output_bfd))
d7921315
L		 3989 howto = x86_64_elf_howto_table + r_type;
3990 else
3991 howto = (x86_64_elf_howto_table
3992 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
351f65ca 3993 r_symndx = htab->r_sym (rel->r_info);
8d88c4ca
NC		 3994 h = NULL;
3995 sym = NULL;
3996 sec = NULL;
b34976b6 3997 unresolved_reloc = FALSE;
8d88c4ca 3998 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH		 3999 {
4000 sym = local_syms + r_symndx;
4001 sec = local_sections[r_symndx];
c434dee6 4002
c25bc9fc
L		 4003 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
4004 &sec, rel);
1788fc08 4005 st_size = sym->st_size;
c25bc9fc
L		 4006
4007 /* Relocate against local STT_GNU_IFUNC symbol. */
0e1862bb 4008 if (!bfd_link_relocatable (info)
351f65ca 4009 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc 4010 {
351f65ca
L		 4011 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
4012 rel, FALSE);
c25bc9fc
L		 4013 if (h == NULL)
4014 abort ();
4015
eed180f8 4016 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 4017 h->root.u.def.value = sym->st_value;
4018 h->root.u.def.section = sec;
4019 }
8da6118f 4020 }
8d88c4ca 4021 else
8da6118f 4022 {
c9736ba0 4023 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 4024 bfd_boolean ignored ATTRIBUTE_UNUSED;
c434dee6 4025
b2a8e766
AM		 4026 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4027 r_symndx, symtab_hdr, sym_hashes,
4028 h, sec, relocation,
62d887d4 4029 unresolved_reloc, warned, ignored);
1788fc08 4030 st_size = h->size;
8da6118f 4031 }
ab96bf03 4032
dbaa2011 4033 if (sec != NULL && discarded_section (sec))
60f2e42e
L		 4034 {
4035 _bfd_clear_contents (howto, input_bfd, input_section,
4036 contents + rel->r_offset);
4037 wrel->r_offset = rel->r_offset;
4038 wrel->r_info = 0;
4039 wrel->r_addend = 0;
4040
4041 /* For ld -r, remove relocations in debug sections against
4042 sections defined in discarded sections. Not done for
4043 eh_frame editing code expects to be present. */
4044 if (bfd_link_relocatable (info)
4045 && (input_section->flags & SEC_DEBUGGING))
4046 wrel--;
4047
4048 continue;
4049 }
ab96bf03 4050
0e1862bb 4051 if (bfd_link_relocatable (info))
2d5da473
L		 4052 {
4053 if (wrel != rel)
4054 *wrel = *rel;
4055 continue;
4056 }
ab96bf03 4057
1788fc08 4058 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
64d25c44 4059 {
1788fc08
L		 4060 if (r_type == R_X86_64_64)
4061 {
4062 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
4063 zero-extend it to 64bit if addend is zero. */
4064 r_type = R_X86_64_32;
4065 memset (contents + rel->r_offset + 4, 0, 4);
4066 }
4067 else if (r_type == R_X86_64_SIZE64)
4068 {
4069 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
4070 zero-extend it to 64bit if addend is zero. */
4071 r_type = R_X86_64_SIZE32;
4072 memset (contents + rel->r_offset + 4, 0, 4);
4073 }
64d25c44
L		 4074 }
4075
0ff2b86e
L		 4076 eh = (struct elf_x86_64_link_hash_entry *) h;
4077
cbe950e9
L		 4078 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4079 it here if it is defined in a non-shared object. */
4080 if (h != NULL
4081 && h->type == STT_GNU_IFUNC
4082 && h->def_regular)
4083 {
cbe950e9 4084 bfd_vma plt_index;
4c544807 4085 const char *name;
cbe950e9 4086
97dc35c8
L		 4087 if ((input_section->flags & SEC_ALLOC) == 0)
4088 {
4089 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4090 sections because such sections are not SEC_ALLOC and
4091 thus ld.so will not process them. */
4092 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 4093 continue;
97dc35c8
L		 4094 abort ();
4095 }
4096 else if (h->plt.offset == (bfd_vma) -1)
cbe950e9
L		 4097 abort ();
4098
4099 /* STT_GNU_IFUNC symbol must go through PLT. */
0ff2b86e
L		 4100 if (htab->elf.splt != NULL)
4101 {
4102 if (htab->plt_bnd != NULL)
4103 {
4104 resolved_plt = htab->plt_bnd;
4105 plt_offset = eh->plt_bnd.offset;
4106 }
4107 else
4108 {
4109 resolved_plt = htab->elf.splt;
4110 plt_offset = h->plt.offset;
4111 }
4112 }
4113 else
4114 {
4115 resolved_plt = htab->elf.iplt;
4116 plt_offset = h->plt.offset;
4117 }
4118
4119 relocation = (resolved_plt->output_section->vma
4120 + resolved_plt->output_offset + plt_offset);
cbe950e9
L		 4121
4122 switch (r_type)
4123 {
4124 default:
4c544807
L		 4125 if (h->root.root.string)
4126 name = h->root.root.string;
4127 else
4128 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4129 NULL);
cbe950e9
L		 4130 (*_bfd_error_handler)
4131 (_("%B: relocation %s against STT_GNU_IFUNC "
4132 "symbol `%s' isn't handled by %s"), input_bfd,
ef77d6af 4133 howto->name, name, __FUNCTION__);
cbe950e9
L		 4134 bfd_set_error (bfd_error_bad_value);
4135 return FALSE;
4136
4137 case R_X86_64_32S:
0e1862bb 4138 if (bfd_link_pic (info))
cbe950e9 4139 abort ();
710ab287
L		 4140 goto do_relocation;
4141
248775ba
L		 4142 case R_X86_64_32:
4143 if (ABI_64_P (output_bfd))
4144 goto do_relocation;
17672001 4145 /* FALLTHROUGH */
eed180f8 4146 case R_X86_64_64:
710ab287
L		 4147 if (rel->r_addend != 0)
4148 {
4c544807
L		 4149 if (h->root.root.string)
4150 name = h->root.root.string;
4151 else
4152 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4153 sym, NULL);
710ab287
L		 4154 (*_bfd_error_handler)
4155 (_("%B: relocation %s against STT_GNU_IFUNC "
4156 "symbol `%s' has non-zero addend: %d"),
ef77d6af 4157 input_bfd, howto->name, name, rel->r_addend);
710ab287
L		 4158 bfd_set_error (bfd_error_bad_value);
4159 return FALSE;
4160 }
4161
4162 /* Generate dynamic relcoation only when there is a
c293fa49 4163 non-GOT reference in a shared object. */
0e1862bb 4164 if (bfd_link_pic (info) && h->non_got_ref)
710ab287
L		 4165 {
4166 Elf_Internal_Rela outrel;
710ab287
L		 4167 asection *sreloc;
4168
c25bc9fc
L		 4169 /* Need a dynamic relocation to get the real function
4170 address. */
710ab287
L		 4171 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4172 info,
4173 input_section,
4174 rel->r_offset);
4175 if (outrel.r_offset == (bfd_vma) -1
4176 || outrel.r_offset == (bfd_vma) -2)
4177 abort ();
4178
4179 outrel.r_offset += (input_section->output_section->vma
4180 + input_section->output_offset);
4181
4182 if (h->dynindx == -1
44c4ea11 4183 || h->forced_local
0e1862bb 4184 || bfd_link_executable (info))
710ab287
L		 4185 {
4186 /* This symbol is resolved locally. */
56b8aada
L		 4187 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4188 outrel.r_addend = (h->root.u.def.value
4189 + h->root.u.def.section->output_section->vma
4190 + h->root.u.def.section->output_offset);
710ab287
L		 4191 }
4192 else
4193 {
351f65ca 4194 outrel.r_info = htab->r_info (h->dynindx, r_type);
710ab287
L		 4195 outrel.r_addend = 0;
4196 }
4197
6de2ae4a 4198 sreloc = htab->elf.irelifunc;
351f65ca 4199 elf_append_rela (output_bfd, sreloc, &outrel);
710ab287
L		 4200
4201 /* If this reloc is against an external symbol, we
4202 do not want to fiddle with the addend. Otherwise,
4203 we need to include the symbol value so that it
4204 becomes an addend for the dynamic reloc. For an
4205 internal symbol, we have updated addend. */
56b8aada 4206 continue;
710ab287 4207 }
17672001 4208 /* FALLTHROUGH */
cbe950e9 4209 case R_X86_64_PC32:
c3320543 4210 case R_X86_64_PC32_BND:
cbe950e9
L		 4211 case R_X86_64_PC64:
4212 case R_X86_64_PLT32:
c3320543 4213 case R_X86_64_PLT32_BND:
cbe950e9
L		 4214 goto do_relocation;
4215
4216 case R_X86_64_GOTPCREL:
56ceb5b5
L		 4217 case R_X86_64_GOTPCRELX:
4218 case R_X86_64_REX_GOTPCRELX:
cbe950e9 4219 case R_X86_64_GOTPCREL64:
6de2ae4a 4220 base_got = htab->elf.sgot;
cbe950e9
L		 4221 off = h->got.offset;
4222
7afd84dc 4223 if (base_got == NULL)
cbe950e9
L		 4224 abort ();
4225
7afd84dc 4226 if (off == (bfd_vma) -1)
cbe950e9 4227 {
7afd84dc
L		 4228 /* We can't use h->got.offset here to save state, or
4229 even just remember the offset, as finish_dynamic_symbol
4230 would use that as offset into .got. */
cbe950e9 4231
6de2ae4a 4232 if (htab->elf.splt != NULL)
7afd84dc 4233 {
eed180f8 4234 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 4235 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 4236 base_got = htab->elf.sgotplt;
7afd84dc 4237 }
cbe950e9
L		 4238 else
4239 {
eed180f8 4240 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 4241 off = plt_index * GOT_ENTRY_SIZE;
6de2ae4a 4242 base_got = htab->elf.igotplt;
7afd84dc
L		 4243 }
4244
4245 if (h->dynindx == -1
4246 || h->forced_local
4247 || info->symbolic)
4248 {
eed180f8 4249 /* This references the local defitionion. We must
7afd84dc 4250 initialize this entry in the global offset table.
eed180f8 4251 Since the offset must always be a multiple of 8,
7afd84dc
L		 4252 we use the least significant bit to record
4253 whether we have initialized it already.
4254
4255 When doing a dynamic link, we create a .rela.got
4256 relocation entry to initialize the value. This
4257 is done in the finish_dynamic_symbol routine. */
4258 if ((off & 1) != 0)
4259 off &= ~1;
4260 else
4261 {
4262 bfd_put_64 (output_bfd, relocation,
4263 base_got->contents + off);
4264 /* Note that this is harmless for the GOTPLT64
4265 case, as -1 | 1 still is -1. */
4266 h->got.offset |= 1;
4267 }
cbe950e9
L		 4268 }
4269 }
4270
4271 relocation = (base_got->output_section->vma
4272 + base_got->output_offset + off);
4273
cbe950e9
L		 4274 goto do_relocation;
4275 }
4276 }
4277
aec6b87e
L		 4278 resolved_to_zero = (eh != NULL
4279 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
4280
70256ad8
AJ		 4281 /* When generating a shared object, the relocations handled here are
4282 copied into the output file to be resolved at run time. */
4283 switch (r_type)
4284 {
4285 case R_X86_64_GOT32:
7b81dfbb 4286 case R_X86_64_GOT64:
70256ad8
AJ		 4287 /* Relocation is to the entry for this symbol in the global
4288 offset table. */
70256ad8 4289 case R_X86_64_GOTPCREL:
56ceb5b5
L		 4290 case R_X86_64_GOTPCRELX:
4291 case R_X86_64_REX_GOTPCRELX:
7b81dfbb
AJ		 4292 case R_X86_64_GOTPCREL64:
4293 /* Use global offset table entry as symbol value. */
4294 case R_X86_64_GOTPLT64:
553d1284 4295 /* This is obsolete and treated the the same as GOT64. */
6de2ae4a 4296 base_got = htab->elf.sgot;
7b81dfbb 4297
6de2ae4a 4298 if (htab->elf.sgot == NULL)
c434dee6 4299 abort ();
053579d7 4300
51e0a107 4301 if (h != NULL)
70256ad8 4302 {
b34976b6 4303 bfd_boolean dyn;
c434dee6
AJ		 4304
4305 off = h->got.offset;
7b81dfbb 4306 if (h->needs_plt
eed180f8 4307 && h->plt.offset != (bfd_vma)-1
7b81dfbb
AJ		 4308 && off == (bfd_vma)-1)
4309 {
4310 /* We can't use h->got.offset here to save
4311 state, or even just remember the offset, as
4312 finish_dynamic_symbol would use that as offset into
4313 .got. */
eed180f8 4314 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
7b81dfbb 4315 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 4316 base_got = htab->elf.sgotplt;
7b81dfbb
AJ		 4317 }
4318
c434dee6 4319 dyn = htab->elf.dynamic_sections_created;
51e0a107 4320
0e1862bb
L		 4321 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4322 || (bfd_link_pic (info)
27482721 4323 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ		 4324 || (ELF_ST_VISIBILITY (h->other)
4325 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH		 4326 {
4327 /* This is actually a static link, or it is a -Bsymbolic
4328 link and the symbol is defined locally, or the symbol
407443a3 4329 was forced to be local because of a version file. We
51e0a107
JH		 4330 must initialize this entry in the global offset table.
4331 Since the offset must always be a multiple of 8, we
4332 use the least significant bit to record whether we
4333 have initialized it already.
4334
4335 When doing a dynamic link, we create a .rela.got
407443a3
AJ		 4336 relocation entry to initialize the value. This is
4337 done in the finish_dynamic_symbol routine. */
51e0a107
JH		 4338 if ((off & 1) != 0)
4339 off &= ~1;
4340 else
4341 {
4342 bfd_put_64 (output_bfd, relocation,
7b81dfbb
AJ		 4343 base_got->contents + off);
4344 /* Note that this is harmless for the GOTPLT64 case,
eed180f8 4345 as -1 | 1 still is -1. */
51e0a107
JH		 4346 h->got.offset |= 1;
4347 }
4348 }
053579d7 4349 else
b34976b6 4350 unresolved_reloc = FALSE;
70256ad8 4351 }
51e0a107
JH		 4352 else
4353 {
c434dee6
AJ		 4354 if (local_got_offsets == NULL)
4355 abort ();
51e0a107
JH		 4356
4357 off = local_got_offsets[r_symndx];
4358
4359 /* The offset must always be a multiple of 8. We use
407443a3
AJ		 4360 the least significant bit to record whether we have
4361 already generated the necessary reloc. */
51e0a107
JH		 4362 if ((off & 1) != 0)
4363 off &= ~1;
4364 else
4365 {
c434dee6 4366 bfd_put_64 (output_bfd, relocation,
7b81dfbb 4367 base_got->contents + off);
51e0a107 4368
0e1862bb 4369 if (bfd_link_pic (info))
51e0a107 4370 {
947216bf 4371 asection *s;
51e0a107 4372 Elf_Internal_Rela outrel;
70256ad8 4373
51e0a107
JH		 4374 /* We need to generate a R_X86_64_RELATIVE reloc
4375 for the dynamic linker. */
6de2ae4a 4376 s = htab->elf.srelgot;
947216bf 4377 if (s == NULL)
c434dee6 4378 abort ();
51e0a107 4379
7b81dfbb
AJ		 4380 outrel.r_offset = (base_got->output_section->vma
4381 + base_got->output_offset
51e0a107 4382 + off);
351f65ca 4383 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
51e0a107 4384 outrel.r_addend = relocation;
351f65ca 4385 elf_append_rela (output_bfd, s, &outrel);
51e0a107
JH		 4386 }
4387
4388 local_got_offsets[r_symndx] |= 1;
4389 }
51e0a107 4390 }
6a2bda3f 4391
c434dee6
AJ		 4392 if (off >= (bfd_vma) -2)
4393 abort ();
4394
7b81dfbb
AJ		 4395 relocation = base_got->output_section->vma
4396 + base_got->output_offset + off;
56ceb5b5
L		 4397 if (r_type != R_X86_64_GOTPCREL
4398 && r_type != R_X86_64_GOTPCRELX
4399 && r_type != R_X86_64_REX_GOTPCRELX
4400 && r_type != R_X86_64_GOTPCREL64)
6de2ae4a
L		 4401 relocation -= htab->elf.sgotplt->output_section->vma
4402 - htab->elf.sgotplt->output_offset;
c434dee6 4403
70256ad8
AJ		 4404 break;
4405
d6ab8113
JB		 4406 case R_X86_64_GOTOFF64:
4407 /* Relocation is relative to the start of the global offset
4408 table. */
4409
3d949995
L		 4410 /* Check to make sure it isn't a protected function or data
4411 symbol for shared library since it may not be local when
e3c0e327
L		 4412 used as function address or with copy relocation. We also
4413 need to make sure that a symbol is referenced locally. */
0e1862bb 4414 if (bfd_link_pic (info) && h)
d6ab8113 4415 {
e3c0e327
L		 4416 if (!h->def_regular)
4417 {
4418 const char *v;
4419
4420 switch (ELF_ST_VISIBILITY (h->other))
4421 {
4422 case STV_HIDDEN:
4423 v = _("hidden symbol");
4424 break;
4425 case STV_INTERNAL:
4426 v = _("internal symbol");
4427 break;
4428 case STV_PROTECTED:
4429 v = _("protected symbol");
4430 break;
4431 default:
4432 v = _("symbol");
4433 break;
4434 }
4435
4436 (*_bfd_error_handler)
4437 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
4438 input_bfd, v, h->root.root.string);
4439 bfd_set_error (bfd_error_bad_value);
4440 return FALSE;
4441 }
0e1862bb 4442 else if (!bfd_link_executable (info)
e3c0e327
L		 4443 && !SYMBOL_REFERENCES_LOCAL (info, h)
4444 && (h->type == STT_FUNC
4445 || h->type == STT_OBJECT)
4446 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4447 {
4448 (*_bfd_error_handler)
4449 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
4450 input_bfd,
4451 h->type == STT_FUNC ? "function" : "data",
4452 h->root.root.string);
4453 bfd_set_error (bfd_error_bad_value);
d6ab8113 4454 return FALSE;
e3c0e327 4455 }
d6ab8113
JB		 4456 }
4457
4458 /* Note that sgot is not involved in this
4459 calculation. We always want the start of .got.plt. If we
4460 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4461 permitted by the ABI, we might have to change this
4462 calculation. */
6de2ae4a
L		 4463 relocation -= htab->elf.sgotplt->output_section->vma
4464 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 4465 break;
4466
4467 case R_X86_64_GOTPC32:
7b81dfbb 4468 case R_X86_64_GOTPC64:
d6ab8113 4469 /* Use global offset table as symbol value. */
6de2ae4a
L		 4470 relocation = htab->elf.sgotplt->output_section->vma
4471 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 4472 unresolved_reloc = FALSE;
4473 break;
7b81dfbb
AJ		 4474
4475 case R_X86_64_PLTOFF64:
4476 /* Relocation is PLT entry relative to GOT. For local
4477 symbols it's the symbol itself relative to GOT. */
eed180f8 4478 if (h != NULL
7b81dfbb
AJ		 4479 /* See PLT32 handling. */
4480 && h->plt.offset != (bfd_vma) -1
6de2ae4a 4481 && htab->elf.splt != NULL)
7b81dfbb 4482 {
0ff2b86e
L		 4483 if (htab->plt_bnd != NULL)
4484 {
4485 resolved_plt = htab->plt_bnd;
4486 plt_offset = eh->plt_bnd.offset;
4487 }
4488 else
4489 {
4490 resolved_plt = htab->elf.splt;
4491 plt_offset = h->plt.offset;
4492 }
4493
4494 relocation = (resolved_plt->output_section->vma
4495 + resolved_plt->output_offset
4496 + plt_offset);
7b81dfbb
AJ		 4497 unresolved_reloc = FALSE;
4498 }
4499
6de2ae4a
L		 4500 relocation -= htab->elf.sgotplt->output_section->vma
4501 + htab->elf.sgotplt->output_offset;
7b81dfbb 4502 break;
d6ab8113 4503
70256ad8 4504 case R_X86_64_PLT32:
c3320543 4505 case R_X86_64_PLT32_BND:
70256ad8
AJ		 4506 /* Relocation is to the entry for this symbol in the
4507 procedure linkage table. */
4508
4509 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 4510 without using the procedure linkage table. */
70256ad8
AJ		 4511 if (h == NULL)
4512 break;
4513
dd7e64d4
L		 4514 if ((h->plt.offset == (bfd_vma) -1
4515 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 4516 || htab->elf.splt == NULL)
70256ad8
AJ		 4517 {
4518 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ		 4519 happens when statically linking PIC code, or when
4520 using -Bsymbolic. */
70256ad8
AJ		 4521 break;
4522 }
4523
dd7e64d4 4524 if (h->plt.offset != (bfd_vma) -1)
0ff2b86e 4525 {
dd7e64d4
L		 4526 if (htab->plt_bnd != NULL)
4527 {
4528 resolved_plt = htab->plt_bnd;
4529 plt_offset = eh->plt_bnd.offset;
4530 }
4531 else
4532 {
4533 resolved_plt = htab->elf.splt;
4534 plt_offset = h->plt.offset;
4535 }
0ff2b86e
L		 4536 }
4537 else
4538 {
dd7e64d4
L		 4539 /* Use the GOT PLT. */
4540 resolved_plt = htab->plt_got;
4541 plt_offset = eh->plt_got.offset;
0ff2b86e
L		 4542 }
4543
4544 relocation = (resolved_plt->output_section->vma
4545 + resolved_plt->output_offset
4546 + plt_offset);
b34976b6 4547 unresolved_reloc = FALSE;
70256ad8
AJ		 4548 break;
4549
1788fc08
L		 4550 case R_X86_64_SIZE32:
4551 case R_X86_64_SIZE64:
1788fc08
L		 4552 /* Set to symbol size. */
4553 relocation = st_size;
4554 goto direct;
4555
fd8ab9e5
AJ		 4556 case R_X86_64_PC8:
4557 case R_X86_64_PC16:
4558 case R_X86_64_PC32:
c3320543 4559 case R_X86_64_PC32_BND:
6333bc0d 4560 /* Don't complain about -fPIC if the symbol is undefined when
aec6b87e
L		 4561 building executable unless it is unresolved weak symbol. */
4562 if ((input_section->flags & SEC_ALLOC) != 0
90f487df 4563 && (input_section->flags & SEC_READONLY) != 0
6333bc0d 4564 && h != NULL
aec6b87e
L		 4565 && ((bfd_link_executable (info)
4566 && h->root.type == bfd_link_hash_undefweak
4567 && !resolved_to_zero)
4568 || (bfd_link_pic (info)
4569 && !(bfd_link_pie (info)
4570 && h->root.type == bfd_link_hash_undefined))))
6610a52d 4571 {
41bed6dd
L		 4572 bfd_boolean fail = FALSE;
4573 bfd_boolean branch
c3320543
L		 4574 = ((r_type == R_X86_64_PC32
4575 || r_type == R_X86_64_PC32_BND)
41bed6dd
L		 4576 && is_32bit_relative_branch (contents, rel->r_offset));
4577
4578 if (SYMBOL_REFERENCES_LOCAL (info, h))
4579 {
4580 /* Symbol is referenced locally. Make sure it is
4581 defined locally or for a branch. */
4582 fail = !h->def_regular && !branch;
4583 }
aec6b87e 4584 else if (!(bfd_link_pie (info)
bc696fd5 4585 && (h->needs_copy || eh->needs_copy)))
41bed6dd 4586 {
9a926d55
L		 4587 /* Symbol doesn't need copy reloc and isn't referenced
4588 locally. We only allow branch to symbol with
4589 non-default visibility. */
41bed6dd
L		 4590 fail = (!branch
4591 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
4592 }
4593
4594 if (fail)
338c190a
L		 4595 return elf_x86_64_need_pic (input_bfd, input_section,
4596 h, NULL, NULL, howto);
6610a52d
L		 4597 }
4598 /* Fall through. */
4599
70256ad8
AJ		 4600 case R_X86_64_8:
4601 case R_X86_64_16:
4602 case R_X86_64_32:
d6ab8113 4603 case R_X86_64_PC64:
6b3db546 4604 case R_X86_64_64:
80643fbc 4605 /* FIXME: The ABI says the linker should make sure the value is
407443a3 4606 the same when it's zeroextended to 64 bit. */
c434dee6 4607
1788fc08 4608direct:
b1e24c02 4609 if ((input_section->flags & SEC_ALLOC) == 0)
c434dee6
AJ		 4610 break;
4611
9a926d55 4612 /* Don't copy a pc-relative relocation into the output file
6333bc0d 4613 if the symbol needs copy reloc or the symbol is undefined
04ebc307 4614 when building executable. Copy dynamic function pointer
aec6b87e
L		 4615 relocations. Don't generate dynamic relocations against
4616 resolved undefined weak symbols in PIE. */
0e1862bb 4617 if ((bfd_link_pic (info)
aec6b87e 4618 && !(bfd_link_pie (info)
fd9edc90 4619 && h != NULL
6333bc0d
L		 4620 && (h->needs_copy
4621 || eh->needs_copy
4622 || h->root.type == bfd_link_hash_undefined)
9a926d55 4623 && IS_X86_64_PCREL_TYPE (r_type))
4bc6e03a 4624 && (h == NULL
aec6b87e
L		 4625 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4626 && !resolved_to_zero)
4627 || h->root.type != bfd_link_hash_undefweak))
1788fc08
L		 4628 && ((! IS_X86_64_PCREL_TYPE (r_type)
4629 && r_type != R_X86_64_SIZE32
4630 && r_type != R_X86_64_SIZE64)
d8045f23 4631 || ! SYMBOL_CALLS_LOCAL (info, h)))
d40d037c 4632 || (ELIMINATE_COPY_RELOCS
0e1862bb 4633 && !bfd_link_pic (info)
c434dee6
AJ		 4634 && h != NULL
4635 && h->dynindx != -1
aec6b87e
L		 4636 && (!h->non_got_ref
4637 || eh->func_pointer_refcount > 0
4638 || (h->root.type == bfd_link_hash_undefweak
4639 && !resolved_to_zero))
bae420ef
L		 4640 && ((h->def_dynamic && !h->def_regular)
4641 /* Undefined weak symbol is bound locally when
4642 PIC is false. */
0f88be7a 4643 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ		 4644 {
4645 Elf_Internal_Rela outrel;
b34976b6 4646 bfd_boolean skip, relocate;
c434dee6 4647 asection *sreloc;
70256ad8
AJ		 4648
4649 /* When generating a shared object, these relocations
4650 are copied into the output file to be resolved at run
407443a3 4651 time. */
b34976b6
AM		 4652 skip = FALSE;
4653 relocate = FALSE;
70256ad8 4654
c629eae0
JJ		 4655 outrel.r_offset =
4656 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 4657 rel->r_offset);
c629eae0 4658 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 4659 skip = TRUE;
0fb19cbc 4660 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 4661 skip = TRUE, relocate = TRUE;
70256ad8
AJ		 4662
4663 outrel.r_offset += (input_section->output_section->vma
4664 + input_section->output_offset);
4665
4666 if (skip)
0bb2d96a 4667 memset (&outrel, 0, sizeof outrel);
c434dee6 4668
fd8ab9e5
AJ		 4669 /* h->dynindx may be -1 if this symbol was marked to
4670 become local. */
4671 else if (h != NULL
c434dee6 4672 && h->dynindx != -1
d8045f23 4673 && (IS_X86_64_PCREL_TYPE (r_type)
4e0c91e4
L		 4674 || !(bfd_link_executable (info)
4675 || SYMBOLIC_BIND (info, h))
d8045f23 4676 || ! h->def_regular))
70256ad8 4677 {
351f65ca 4678 outrel.r_info = htab->r_info (h->dynindx, r_type);
c434dee6 4679 outrel.r_addend = rel->r_addend;
70256ad8
AJ		 4680 }
4681 else
4682 {
4c10bbaa
L		 4683 /* This symbol is local, or marked to become local.
4684 When relocation overflow check is disabled, we
4685 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
4686 if (r_type == htab->pointer_r_type
4687 || (r_type == R_X86_64_32
4688 && info->no_reloc_overflow_check))
607c0e09 4689 {
b34976b6 4690 relocate = TRUE;
351f65ca 4691 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
607c0e09
AS		 4692 outrel.r_addend = relocation + rel->r_addend;
4693 }
64d25c44
L		 4694 else if (r_type == R_X86_64_64
4695 && !ABI_64_P (output_bfd))
4696 {
4697 relocate = TRUE;
4698 outrel.r_info = htab->r_info (0,
4699 R_X86_64_RELATIVE64);
4700 outrel.r_addend = relocation + rel->r_addend;
8cf0d2dd
L		 4701 /* Check addend overflow. */
4702 if ((outrel.r_addend & 0x80000000)
4703 != (rel->r_addend & 0x80000000))
4704 {
4705 const char *name;
268a8d3a 4706 int addend = rel->r_addend;
8cf0d2dd
L		 4707 if (h && h->root.root.string)
4708 name = h->root.root.string;
4709 else
4710 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4711 sym, NULL);
6f2c9068
L		 4712 if (addend < 0)
4713 (*_bfd_error_handler)
268a8d3a 4714 (_("%B: addend -0x%x in relocation %s against "
6f2c9068
L		 4715 "symbol `%s' at 0x%lx in section `%A' is "
4716 "out of range"),
4717 input_bfd, input_section, addend,
ef77d6af
L		 4718 howto->name, name,
4719 (unsigned long) rel->r_offset);
6f2c9068
L		 4720 else
4721 (*_bfd_error_handler)
268a8d3a 4722 (_("%B: addend 0x%x in relocation %s against "
6f2c9068
L		 4723 "symbol `%s' at 0x%lx in section `%A' is "
4724 "out of range"),
4725 input_bfd, input_section, addend,
ef77d6af
L		 4726 howto->name, name,
4727 (unsigned long) rel->r_offset);
8cf0d2dd
L		 4728 bfd_set_error (bfd_error_bad_value);
4729 return FALSE;
4730 }
64d25c44 4731 }
607c0e09
AS		 4732 else
4733 {
4734 long sindx;
4735
8517fae7 4736 if (bfd_is_abs_section (sec))
607c0e09
AS		 4737 sindx = 0;
4738 else if (sec == NULL || sec->owner == NULL)
4739 {
4740 bfd_set_error (bfd_error_bad_value);
b34976b6 4741 return FALSE;
607c0e09
AS		 4742 }
4743 else
4744 {
4745 asection *osec;
4746
74541ad4
AM		 4747 /* We are turning this relocation into one
4748 against a section symbol. It would be
4749 proper to subtract the symbol's value,
4750 osec->vma, from the emitted reloc addend,
4751 but ld.so expects buggy relocs. */
607c0e09
AS		 4752 osec = sec->output_section;
4753 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 4754 if (sindx == 0)
4755 {
4756 asection *oi = htab->elf.text_index_section;
4757 sindx = elf_section_data (oi)->dynindx;
4758 }
4759 BFD_ASSERT (sindx != 0);
607c0e09
AS		 4760 }
4761
351f65ca 4762 outrel.r_info = htab->r_info (sindx, r_type);
607c0e09
AS		 4763 outrel.r_addend = relocation + rel->r_addend;
4764 }
70256ad8
AJ		 4765 }
4766
cbe950e9 4767 sreloc = elf_section_data (input_section)->sreloc;
d8045f23 4768
62d78908
L		 4769 if (sreloc == NULL || sreloc->contents == NULL)
4770 {
4771 r = bfd_reloc_notsupported;
4772 goto check_relocation_error;
4773 }
c434dee6 4774
351f65ca 4775 elf_append_rela (output_bfd, sreloc, &outrel);
70256ad8
AJ		 4776
4777 /* If this reloc is against an external symbol, we do
4778 not want to fiddle with the addend. Otherwise, we
4779 need to include the symbol value so that it becomes
4780 an addend for the dynamic reloc. */
0f88be7a 4781 if (! relocate)
70256ad8
AJ		 4782 continue;
4783 }
4784
4785 break;
4786
bffbf940 4787 case R_X86_64_TLSGD:
67a4f2b7
AO		 4788 case R_X86_64_GOTPC32_TLSDESC:
4789 case R_X86_64_TLSDESC_CALL:
bffbf940 4790 case R_X86_64_GOTTPOFF:
bffbf940
JJ		 4791 tls_type = GOT_UNKNOWN;
4792 if (h == NULL && local_got_offsets)
351f65ca 4793 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
bffbf940 4794 else if (h != NULL)
351f65ca 4795 tls_type = elf_x86_64_hash_entry (h)->tls_type;
142411ca 4796
351f65ca
L		 4797 if (! elf_x86_64_tls_transition (info, input_bfd,
4798 input_section, contents,
4799 symtab_hdr, sym_hashes,
4800 &r_type, tls_type, rel,
4801 relend, h, r_symndx))
534a31f6 4802 return FALSE;
bffbf940
JJ		 4803
4804 if (r_type == R_X86_64_TPOFF32)
4805 {
142411ca
L		 4806 bfd_vma roff = rel->r_offset;
4807
bffbf940 4808 BFD_ASSERT (! unresolved_reloc);
142411ca 4809
351f65ca 4810 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
bffbf940 4811 {
52bc799a 4812 /* GD->LE transition. For 64bit, change
abcf1d52 4813 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
a3fadc9a 4814 .word 0x6666; rex64; call __tls_get_addr
52bc799a 4815 into:
bffbf940 4816 movq %fs:0, %rax
52bc799a
L		 4817 leaq foo@tpoff(%rax), %rax
4818 For 32bit, change
4819 leaq foo@tlsgd(%rip), %rdi
4820 .word 0x6666; rex64; call __tls_get_addr
4821 into:
4822 movl %fs:0, %eax
5c98a14e
JJ		 4823 leaq foo@tpoff(%rax), %rax
4824 For largepic, change:
4825 leaq foo@tlsgd(%rip), %rdi
4826 movabsq $__tls_get_addr@pltoff, %rax
4827 addq %rbx, %rax
4828 call *%rax
4829 into:
4830 movq %fs:0, %rax
4831 leaq foo@tpoff(%rax), %rax
4832 nopw 0x0(%rax,%rax,1) */
4833 int largepic = 0;
4834 if (ABI_64_P (output_bfd)
4835 && contents[roff + 5] == (bfd_byte) '\xb8')
4836 {
4837 memcpy (contents + roff - 3,
4838 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4839 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4840 largepic = 1;
4841 }
4842 else if (ABI_64_P (output_bfd))
52bc799a
L		 4843 memcpy (contents + roff - 4,
4844 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4845 16);
4846 else
4847 memcpy (contents + roff - 3,
4848 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4849 15);
eb4ff4d6 4850 bfd_put_32 (output_bfd,
351f65ca 4851 elf_x86_64_tpoff (info, relocation),
5c98a14e
JJ		 4852 contents + roff + 8 + largepic);
4853 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
bffbf940 4854 rel++;
60f2e42e 4855 wrel++;
bffbf940
JJ		 4856 continue;
4857 }
351f65ca 4858 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
67a4f2b7
AO		 4859 {
4860 /* GDesc -> LE transition.
4861 It's originally something like:
4862 leaq x@tlsdesc(%rip), %rax
4863
4864 Change it to:
c9736ba0 4865 movl $x@tpoff, %rax. */
67a4f2b7 4866
c9736ba0 4867 unsigned int val, type;
67a4f2b7 4868
67a4f2b7 4869 type = bfd_get_8 (input_bfd, contents + roff - 3);
67a4f2b7 4870 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 4871 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
4872 contents + roff - 3);
4873 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
4874 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4875 contents + roff - 1);
eb4ff4d6 4876 bfd_put_32 (output_bfd,
351f65ca 4877 elf_x86_64_tpoff (info, relocation),
67a4f2b7
AO		 4878 contents + roff);
4879 continue;
4880 }
351f65ca 4881 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
67a4f2b7
AO		 4882 {
4883 /* GDesc -> LE transition.
4884 It's originally:
4885 call *(%rax)
4886 Turn it into:
142411ca 4887 xchg %ax,%ax. */
10efb593 4888 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4889 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4890 continue;
4891 }
351f65ca 4892 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
bffbf940 4893 {
bffbf940 4894 /* IE->LE transition:
cf61b747 4895 For 64bit, originally it can be one of:
bffbf940
JJ		 4896 movq foo@gottpoff(%rip), %reg
4897 addq foo@gottpoff(%rip), %reg
4898 We change it into:
4899 movq $foo, %reg
4900 leaq foo(%reg), %reg
cf61b747
L		 4901 addq $foo, %reg.
4902 For 32bit, originally it can be one of:
4903 movq foo@gottpoff(%rip), %reg
4904 addl foo@gottpoff(%rip), %reg
4905 We change it into:
4906 movq $foo, %reg
4907 leal foo(%reg), %reg
4908 addl $foo, %reg. */
142411ca
L		 4909
4910 unsigned int val, type, reg;
4911
cf61b747
L		 4912 if (roff >= 3)
4913 val = bfd_get_8 (input_bfd, contents + roff - 3);
4914 else
4915 val = 0;
142411ca
L		 4916 type = bfd_get_8 (input_bfd, contents + roff - 2);
4917 reg = bfd_get_8 (input_bfd, contents + roff - 1);
bffbf940 4918 reg >>= 3;
bffbf940
JJ		 4919 if (type == 0x8b)
4920 {
4921 /* movq */
4922 if (val == 0x4c)
4923 bfd_put_8 (output_bfd, 0x49,
142411ca 4924 contents + roff - 3);
4a4c5f25
L		 4925 else if (!ABI_64_P (output_bfd) && val == 0x44)
4926 bfd_put_8 (output_bfd, 0x41,
4927 contents + roff - 3);
bffbf940 4928 bfd_put_8 (output_bfd, 0xc7,
142411ca 4929 contents + roff - 2);
bffbf940 4930 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4931 contents + roff - 1);
bffbf940
JJ		 4932 }
4933 else if (reg == 4)
4934 {
cf61b747
L		 4935 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4936 is special */
bffbf940
JJ		 4937 if (val == 0x4c)
4938 bfd_put_8 (output_bfd, 0x49,
142411ca 4939 contents + roff - 3);
4a4c5f25
L		 4940 else if (!ABI_64_P (output_bfd) && val == 0x44)
4941 bfd_put_8 (output_bfd, 0x41,
4942 contents + roff - 3);
bffbf940 4943 bfd_put_8 (output_bfd, 0x81,
142411ca 4944 contents + roff - 2);
bffbf940 4945 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4946 contents + roff - 1);
bffbf940
JJ		 4947 }
4948 else
4949 {
cf61b747 4950 /* addq/addl -> leaq/leal */
bffbf940
JJ		 4951 if (val == 0x4c)
4952 bfd_put_8 (output_bfd, 0x4d,
142411ca 4953 contents + roff - 3);
4a4c5f25
L		 4954 else if (!ABI_64_P (output_bfd) && val == 0x44)
4955 bfd_put_8 (output_bfd, 0x45,
4956 contents + roff - 3);
bffbf940 4957 bfd_put_8 (output_bfd, 0x8d,
142411ca 4958 contents + roff - 2);
bffbf940 4959 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
142411ca 4960 contents + roff - 1);
bffbf940 4961 }
eb4ff4d6 4962 bfd_put_32 (output_bfd,
351f65ca 4963 elf_x86_64_tpoff (info, relocation),
142411ca 4964 contents + roff);
bffbf940
JJ		 4965 continue;
4966 }
142411ca
L		 4967 else
4968 BFD_ASSERT (FALSE);
bffbf940
JJ		 4969 }
4970
6de2ae4a 4971 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4972 abort ();
4973
4974 if (h != NULL)
67a4f2b7
AO		 4975 {
4976 off = h->got.offset;
351f65ca 4977 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
67a4f2b7 4978 }
bffbf940
JJ		 4979 else
4980 {
4981 if (local_got_offsets == NULL)
4982 abort ();
4983
4984 off = local_got_offsets[r_symndx];
67a4f2b7 4985 offplt = local_tlsdesc_gotents[r_symndx];
bffbf940
JJ		 4986 }
4987
4988 if ((off & 1) != 0)
4989 off &= ~1;
26e41594 4990 else
bffbf940
JJ		 4991 {
4992 Elf_Internal_Rela outrel;
bffbf940 4993 int dr_type, indx;
67a4f2b7 4994 asection *sreloc;
bffbf940 4995
6de2ae4a 4996 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4997 abort ();
4998
67a4f2b7
AO		 4999 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5000
5001 if (GOT_TLS_GDESC_P (tls_type))
5002 {
351f65ca 5003 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
67a4f2b7 5004 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
6de2ae4a
L		 5005 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
5006 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
5007 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 5008 + offplt
5009 + htab->sgotplt_jump_table_size);
6de2ae4a 5010 sreloc = htab->elf.srelplt;
67a4f2b7 5011 if (indx == 0)
351f65ca 5012 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
67a4f2b7
AO		 5013 else
5014 outrel.r_addend = 0;
351f65ca 5015 elf_append_rela (output_bfd, sreloc, &outrel);
67a4f2b7
AO		 5016 }
5017
6de2ae4a 5018 sreloc = htab->elf.srelgot;
67a4f2b7 5019
6de2ae4a
L		 5020 outrel.r_offset = (htab->elf.sgot->output_section->vma
5021 + htab->elf.sgot->output_offset + off);
bffbf940 5022
67a4f2b7 5023 if (GOT_TLS_GD_P (tls_type))
bffbf940 5024 dr_type = R_X86_64_DTPMOD64;
67a4f2b7
AO		 5025 else if (GOT_TLS_GDESC_P (tls_type))
5026 goto dr_done;
bffbf940
JJ		 5027 else
5028 dr_type = R_X86_64_TPOFF64;
5029
6de2ae4a 5030 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
bffbf940 5031 outrel.r_addend = 0;
67a4f2b7
AO		 5032 if ((dr_type == R_X86_64_TPOFF64
5033 || dr_type == R_X86_64_TLSDESC) && indx == 0)
351f65ca
L		 5034 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5035 outrel.r_info = htab->r_info (indx, dr_type);
bffbf940 5036
351f65ca 5037 elf_append_rela (output_bfd, sreloc, &outrel);
bffbf940 5038
67a4f2b7 5039 if (GOT_TLS_GD_P (tls_type))
bffbf940
JJ		 5040 {
5041 if (indx == 0)
5042 {
d40d037c 5043 BFD_ASSERT (! unresolved_reloc);
bffbf940 5044 bfd_put_64 (output_bfd,
351f65ca 5045 relocation - elf_x86_64_dtpoff_base (info),
6de2ae4a 5046 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
bffbf940
JJ		 5047 }
5048 else
5049 {
5050 bfd_put_64 (output_bfd, 0,
6de2ae4a 5051 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 5052 outrel.r_info = htab->r_info (indx,
bffbf940
JJ		 5053 R_X86_64_DTPOFF64);
5054 outrel.r_offset += GOT_ENTRY_SIZE;
351f65ca 5055 elf_append_rela (output_bfd, sreloc,
464d3bd4 5056 &outrel);
bffbf940
JJ		 5057 }
5058 }
5059
67a4f2b7 5060 dr_done:
bffbf940
JJ		 5061 if (h != NULL)
5062 h->got.offset |= 1;
5063 else
5064 local_got_offsets[r_symndx] |= 1;
5065 }
5066
67a4f2b7
AO		 5067 if (off >= (bfd_vma) -2
5068 && ! GOT_TLS_GDESC_P (tls_type))
bffbf940 5069 abort ();
351f65ca 5070 if (r_type == ELF32_R_TYPE (rel->r_info))
bffbf940 5071 {
67a4f2b7
AO		 5072 if (r_type == R_X86_64_GOTPC32_TLSDESC
5073 || r_type == R_X86_64_TLSDESC_CALL)
6de2ae4a
L		 5074 relocation = htab->elf.sgotplt->output_section->vma
5075 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 5076 + offplt + htab->sgotplt_jump_table_size;
5077 else
6de2ae4a
L		 5078 relocation = htab->elf.sgot->output_section->vma
5079 + htab->elf.sgot->output_offset + off;
b34976b6 5080 unresolved_reloc = FALSE;
bffbf940 5081 }
142411ca 5082 else
67a4f2b7 5083 {
142411ca 5084 bfd_vma roff = rel->r_offset;
67a4f2b7 5085
351f65ca 5086 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
142411ca 5087 {
52bc799a 5088 /* GD->IE transition. For 64bit, change
142411ca
L		 5089 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5090 .word 0x6666; rex64; call __tls_get_addr@plt
52bc799a 5091 into:
142411ca 5092 movq %fs:0, %rax
52bc799a
L		 5093 addq foo@gottpoff(%rip), %rax
5094 For 32bit, change
5095 leaq foo@tlsgd(%rip), %rdi
5096 .word 0x6666; rex64; call __tls_get_addr@plt
5097 into:
5098 movl %fs:0, %eax
5c98a14e
JJ		 5099 addq foo@gottpoff(%rip), %rax
5100 For largepic, change:
5101 leaq foo@tlsgd(%rip), %rdi
5102 movabsq $__tls_get_addr@pltoff, %rax
5103 addq %rbx, %rax
5104 call *%rax
5105 into:
5106 movq %fs:0, %rax
5107 addq foo@gottpoff(%rax), %rax
5108 nopw 0x0(%rax,%rax,1) */
5109 int largepic = 0;
5110 if (ABI_64_P (output_bfd)
5111 && contents[roff + 5] == (bfd_byte) '\xb8')
5112 {
5113 memcpy (contents + roff - 3,
5114 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
5115 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5116 largepic = 1;
5117 }
5118 else if (ABI_64_P (output_bfd))
52bc799a
L		 5119 memcpy (contents + roff - 4,
5120 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5121 16);
5122 else
5123 memcpy (contents + roff - 3,
5124 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5125 15);
142411ca 5126
6de2ae4a
L		 5127 relocation = (htab->elf.sgot->output_section->vma
5128 + htab->elf.sgot->output_offset + off
142411ca 5129 - roff
5c98a14e 5130 - largepic
142411ca
L		 5131 - input_section->output_section->vma
5132 - input_section->output_offset
5133 - 12);
5134 bfd_put_32 (output_bfd, relocation,
5c98a14e
JJ		 5135 contents + roff + 8 + largepic);
5136 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
142411ca 5137 rel++;
60f2e42e 5138 wrel++;
142411ca
L		 5139 continue;
5140 }
351f65ca 5141 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
142411ca
L		 5142 {
5143 /* GDesc -> IE transition.
5144 It's originally something like:
5145 leaq x@tlsdesc(%rip), %rax
67a4f2b7 5146
142411ca 5147 Change it to:
c9736ba0 5148 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
67a4f2b7 5149
142411ca
L		 5150 /* Now modify the instruction as appropriate. To
5151 turn a leaq into a movq in the form we use it, it
5152 suffices to change the second byte from 0x8d to
5153 0x8b. */
5154 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5155
5156 bfd_put_32 (output_bfd,
6de2ae4a
L		 5157 htab->elf.sgot->output_section->vma
5158 + htab->elf.sgot->output_offset + off
142411ca
L		 5159 - rel->r_offset
5160 - input_section->output_section->vma
5161 - input_section->output_offset
5162 - 4,
5163 contents + roff);
5164 continue;
5165 }
351f65ca 5166 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
142411ca
L		 5167 {
5168 /* GDesc -> IE transition.
5169 It's originally:
5170 call *(%rax)
5171
5172 Change it to:
c9736ba0 5173 xchg %ax, %ax. */
142411ca 5174
142411ca
L		 5175 bfd_put_8 (output_bfd, 0x66, contents + roff);
5176 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5177 continue;
5178 }
5179 else
5180 BFD_ASSERT (FALSE);
67a4f2b7 5181 }
bffbf940
JJ		 5182 break;
5183
5184 case R_X86_64_TLSLD:
351f65ca
L		 5185 if (! elf_x86_64_tls_transition (info, input_bfd,
5186 input_section, contents,
5187 symtab_hdr, sym_hashes,
5188 &r_type, GOT_UNKNOWN,
5189 rel, relend, h, r_symndx))
142411ca 5190 return FALSE;
a3fadc9a 5191
142411ca
L		 5192 if (r_type != R_X86_64_TLSLD)
5193 {
bffbf940 5194 /* LD->LE transition:
a3fadc9a 5195 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
52bc799a
L		 5196 For 64bit, we change it into:
5197 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
5198 For 32bit, we change it into:
5c98a14e
JJ		 5199 nopl 0x0(%rax); movl %fs:0, %eax.
5200 For largepic, change:
5201 leaq foo@tlsgd(%rip), %rdi
5202 movabsq $__tls_get_addr@pltoff, %rax
5203 addq %rbx, %rax
5204 call *%rax
5205 into:
5206 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
5207 movq %fs:0, %eax */
142411ca
L		 5208
5209 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5c98a14e
JJ		 5210 if (ABI_64_P (output_bfd)
5211 && contents[rel->r_offset + 5] == (bfd_byte) '\xb8')
5212 memcpy (contents + rel->r_offset - 3,
5213 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5214 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5215 else if (ABI_64_P (output_bfd))
52bc799a
L		 5216 memcpy (contents + rel->r_offset - 3,
5217 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5218 else
5219 memcpy (contents + rel->r_offset - 3,
5220 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5c98a14e 5221 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
bffbf940 5222 rel++;
60f2e42e 5223 wrel++;
bffbf940
JJ		 5224 continue;
5225 }
5226
6de2ae4a 5227 if (htab->elf.sgot == NULL)
bffbf940
JJ		 5228 abort ();
5229
5230 off = htab->tls_ld_got.offset;
5231 if (off & 1)
5232 off &= ~1;
5233 else
5234 {
5235 Elf_Internal_Rela outrel;
bffbf940 5236
6de2ae4a 5237 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 5238 abort ();
5239
6de2ae4a
L		 5240 outrel.r_offset = (htab->elf.sgot->output_section->vma
5241 + htab->elf.sgot->output_offset + off);
bffbf940
JJ		 5242
5243 bfd_put_64 (output_bfd, 0,
6de2ae4a 5244 htab->elf.sgot->contents + off);
bffbf940 5245 bfd_put_64 (output_bfd, 0,
6de2ae4a 5246 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 5247 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
bffbf940 5248 outrel.r_addend = 0;
351f65ca 5249 elf_append_rela (output_bfd, htab->elf.srelgot,
464d3bd4 5250 &outrel);
bffbf940
JJ		 5251 htab->tls_ld_got.offset |= 1;
5252 }
6de2ae4a
L		 5253 relocation = htab->elf.sgot->output_section->vma
5254 + htab->elf.sgot->output_offset + off;
b34976b6 5255 unresolved_reloc = FALSE;
bffbf940
JJ		 5256 break;
5257
5258 case R_X86_64_DTPOFF32:
0e1862bb
L		 5259 if (!bfd_link_executable (info)
5260 || (input_section->flags & SEC_CODE) == 0)
351f65ca 5261 relocation -= elf_x86_64_dtpoff_base (info);
bffbf940 5262 else
351f65ca 5263 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 5264 break;
5265
5266 case R_X86_64_TPOFF32:
6769d501 5267 case R_X86_64_TPOFF64:
0e1862bb 5268 BFD_ASSERT (bfd_link_executable (info));
351f65ca 5269 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 5270 break;
5271
a69ed7f7
L		 5272 case R_X86_64_DTPOFF64:
5273 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
5274 relocation -= elf_x86_64_dtpoff_base (info);
5275 break;
5276
70256ad8
AJ		 5277 default:
5278 break;
5279 }
8d88c4ca 5280
239e1f3a
AM		 5281 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5282 because such sections are not SEC_ALLOC and thus ld.so will
5283 not process them. */
c434dee6 5284 if (unresolved_reloc
239e1f3a 5285 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 5286 && h->def_dynamic)
5287 && _bfd_elf_section_offset (output_bfd, info, input_section,
5288 rel->r_offset) != (bfd_vma) -1)
a040981f
L		 5289 {
5290 (*_bfd_error_handler)
5291 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5292 input_bfd,
5293 input_section,
5294 (long) rel->r_offset,
5295 howto->name,
5296 h->root.root.string);
5297 return FALSE;
5298 }
c434dee6 5299
cbe950e9 5300do_relocation:
8d88c4ca 5301 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ		 5302 contents, rel->r_offset,
5303 relocation, rel->r_addend);
8d88c4ca 5304
62d78908 5305check_relocation_error:
8d88c4ca 5306 if (r != bfd_reloc_ok)
8da6118f 5307 {
c434dee6
AJ		 5308 const char *name;
5309
5310 if (h != NULL)
5311 name = h->root.root.string;
5312 else
8da6118f 5313 {
c434dee6
AJ		 5314 name = bfd_elf_string_from_elf_section (input_bfd,
5315 symtab_hdr->sh_link,
5316 sym->st_name);
5317 if (name == NULL)
b34976b6 5318 return FALSE;
c434dee6
AJ		 5319 if (*name == '\0')
5320 name = bfd_section_name (input_bfd, sec);
5321 }
5322
5323 if (r == bfd_reloc_overflow)
5324 {
c434dee6 5325 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 5326 (info, (h ? &h->root : NULL), name, howto->name,
5327 (bfd_vma) 0, input_bfd, input_section,
5328 rel->r_offset)))
b34976b6 5329 return FALSE;
c434dee6
AJ		 5330 }
5331 else
5332 {
5333 (*_bfd_error_handler)
bb95161d 5334 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
d003868e 5335 input_bfd, input_section,
c434dee6 5336 (long) rel->r_offset, name, (int) r);
b34976b6 5337 return FALSE;
8da6118f
KH		 5338 }
5339 }
60f2e42e
L		 5340
5341 if (wrel != rel)
5342 *wrel = *rel;
5343 }
5344
5345 if (wrel != rel)
5346 {
5347 Elf_Internal_Shdr *rel_hdr;
5348 size_t deleted = rel - wrel;
5349
5350 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5351 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5352 if (rel_hdr->sh_size == 0)
5353 {
5354 /* It is too late to remove an empty reloc section. Leave
5355 one NONE reloc.
5356 ??? What is wrong with an empty section??? */
5357 rel_hdr->sh_size = rel_hdr->sh_entsize;
5358 deleted -= 1;
5359 }
5360 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5361 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5362 input_section->reloc_count -= deleted;
8d88c4ca 5363 }
70256ad8 5364
b34976b6 5365 return TRUE;
70256ad8
AJ		 5366}
5367
5368/* Finish up dynamic symbol handling. We set the contents of various
5369 dynamic sections here. */
5370
b34976b6 5371static bfd_boolean
351f65ca
L		 5372elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
5373 struct bfd_link_info *info,
5374 struct elf_link_hash_entry *h,
aec6b87e 5375 Elf_Internal_Sym *sym)
70256ad8 5376{
351f65ca 5377 struct elf_x86_64_link_hash_table *htab;
0ff2b86e
L		 5378 const struct elf_x86_64_backend_data *abed;
5379 bfd_boolean use_plt_bnd;
dd7e64d4 5380 struct elf_x86_64_link_hash_entry *eh;
aec6b87e 5381 bfd_boolean local_undefweak;
70256ad8 5382
351f65ca 5383 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 5384 if (htab == NULL)
5385 return FALSE;
70256ad8 5386
0ff2b86e
L		 5387 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5388 section only if there is .plt section. */
5389 use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL;
5390 abed = (use_plt_bnd
5391 ? &elf_x86_64_bnd_arch_bed
5392 : get_elf_x86_64_backend_data (output_bfd));
5393
dd7e64d4
L		 5394 eh = (struct elf_x86_64_link_hash_entry *) h;
5395
aec6b87e
L		 5396 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5397 resolved undefined weak symbols in executable so that their
5398 references have value 0 at run-time. */
5399 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
5400
70256ad8
AJ		 5401 if (h->plt.offset != (bfd_vma) -1)
5402 {
70256ad8 5403 bfd_vma plt_index;
0ff2b86e
L		 5404 bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset;
5405 bfd_vma plt_plt_insn_end, plt_got_insn_size;
70256ad8 5406 Elf_Internal_Rela rela;
947216bf 5407 bfd_byte *loc;
0ff2b86e 5408 asection *plt, *gotplt, *relplt, *resolved_plt;
351f65ca 5409 const struct elf_backend_data *bed;
5974eba6 5410 bfd_vma plt_got_pcrel_offset;
cbe950e9
L		 5411
5412 /* When building a static executable, use .iplt, .igot.plt and
5413 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 5414 if (htab->elf.splt != NULL)
cbe950e9 5415 {
6de2ae4a
L		 5416 plt = htab->elf.splt;
5417 gotplt = htab->elf.sgotplt;
5418 relplt = htab->elf.srelplt;
cbe950e9
L		 5419 }
5420 else
5421 {
6de2ae4a
L		 5422 plt = htab->elf.iplt;
5423 gotplt = htab->elf.igotplt;
5424 relplt = htab->elf.irelplt;
cbe950e9 5425 }
70256ad8
AJ		 5426
5427 /* This symbol has an entry in the procedure linkage table. Set
407443a3 5428 it up. */
cbe950e9 5429 if ((h->dynindx == -1
aec6b87e 5430 && !local_undefweak
0e1862bb 5431 && !((h->forced_local || bfd_link_executable (info))
cbe950e9
L		 5432 && h->def_regular
5433 && h->type == STT_GNU_IFUNC))
5434 || plt == NULL
5435 || gotplt == NULL
5436 || relplt == NULL)
cec7f46a 5437 abort ();
70256ad8
AJ		 5438
5439 /* Get the index in the procedure linkage table which
5440 corresponds to this symbol. This is the index of this symbol
5441 in all the symbols for which we are making plt entries. The
cbe950e9 5442 first entry in the procedure linkage table is reserved.
6bbec505 5443
cbe950e9 5444 Get the offset into the .got table of the entry that
407443a3 5445 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
cbe950e9
L		 5446 bytes. The first three are reserved for the dynamic linker.
5447
5448 For static executables, we don't reserve anything. */
5449
6de2ae4a 5450 if (plt == htab->elf.splt)
cbe950e9 5451 {
eed180f8 5452 got_offset = h->plt.offset / abed->plt_entry_size - 1;
e1f98742 5453 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
cbe950e9
L		 5454 }
5455 else
5456 {
eed180f8 5457 got_offset = h->plt.offset / abed->plt_entry_size;
e1f98742 5458 got_offset = got_offset * GOT_ENTRY_SIZE;
cbe950e9 5459 }
70256ad8 5460
0ff2b86e
L		 5461 plt_plt_insn_end = abed->plt_plt_insn_end;
5462 plt_plt_offset = abed->plt_plt_offset;
5463 plt_got_insn_size = abed->plt_got_insn_size;
5464 plt_got_offset = abed->plt_got_offset;
5465 if (use_plt_bnd)
5466 {
5467 /* Use the second PLT with BND relocations. */
5468 const bfd_byte *plt_entry, *plt2_entry;
0ff2b86e
L		 5469
5470 if (eh->has_bnd_reloc)
5471 {
5472 plt_entry = elf_x86_64_bnd_plt_entry;
5473 plt2_entry = elf_x86_64_bnd_plt2_entry;
5474 }
5475 else
5476 {
5477 plt_entry = elf_x86_64_legacy_plt_entry;
5478 plt2_entry = elf_x86_64_legacy_plt2_entry;
5479
5480 /* Subtract 1 since there is no BND prefix. */
5481 plt_plt_insn_end -= 1;
5482 plt_plt_offset -= 1;
5483 plt_got_insn_size -= 1;
5484 plt_got_offset -= 1;
5485 }
5486
5487 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry)
5488 == sizeof (elf_x86_64_legacy_plt_entry));
5489
5490 /* Fill in the entry in the procedure linkage table. */
5491 memcpy (plt->contents + h->plt.offset,
5492 plt_entry, sizeof (elf_x86_64_legacy_plt_entry));
5493 /* Fill in the entry in the second PLT. */
5494 memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset,
5495 plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5496
5497 resolved_plt = htab->plt_bnd;
5498 plt_offset = eh->plt_bnd.offset;
5499 }
5500 else
5501 {
5502 /* Fill in the entry in the procedure linkage table. */
5503 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
5504 abed->plt_entry_size);
5505
5506 resolved_plt = plt;
5507 plt_offset = h->plt.offset;
5508 }
eed180f8
RM		 5509
5510 /* Insert the relocation positions of the plt section. */
5511
5512 /* Put offset the PC-relative instruction referring to the GOT entry,
5513 subtracting the size of that instruction. */
ab7fede8
L		 5514 plt_got_pcrel_offset = (gotplt->output_section->vma
5515 + gotplt->output_offset
5516 + got_offset
5517 - resolved_plt->output_section->vma
5518 - resolved_plt->output_offset
5519 - plt_offset
5520 - plt_got_insn_size);
5521
5522 /* Check PC-relative offset overflow in PLT entry. */
5974eba6 5523 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
ab7fede8
L		 5524 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5525 output_bfd, h->root.root.string);
5526
5527 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
0ff2b86e 5528 resolved_plt->contents + plt_offset + plt_got_offset);
cbe950e9 5529
653165cc 5530 /* Fill in the entry in the global offset table, initially this
aec6b87e
L		 5531 points to the second part of the PLT entry. Leave the entry
5532 as zero for undefined weak symbol in PIE. No PLT relocation
5533 against undefined weak symbol in PIE. */
5534 if (!local_undefweak)
cbe950e9 5535 {
aec6b87e
L		 5536 bfd_put_64 (output_bfd, (plt->output_section->vma
5537 + plt->output_offset
5538 + h->plt.offset
5539 + abed->plt_lazy_offset),
5540 gotplt->contents + got_offset);
5541
5542 /* Fill in the entry in the .rela.plt section. */
5543 rela.r_offset = (gotplt->output_section->vma
5544 + gotplt->output_offset
5545 + got_offset);
5546 if (h->dynindx == -1
5547 || ((bfd_link_executable (info)
5548 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5549 && h->def_regular
5550 && h->type == STT_GNU_IFUNC))
5551 {
5552 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5553 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5554 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
5555 rela.r_addend = (h->root.u.def.value
5556 + h->root.u.def.section->output_section->vma
5557 + h->root.u.def.section->output_offset);
5558 /* R_X86_64_IRELATIVE comes last. */
5559 plt_index = htab->next_irelative_index--;
5560 }
5561 else
5562 {
5563 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
5564 rela.r_addend = 0;
5565 plt_index = htab->next_jump_slot_index++;
5566 }
e1f98742 5567
aec6b87e
L		 5568 /* Don't fill PLT entry for static executables. */
5569 if (plt == htab->elf.splt)
5570 {
5571 bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end;
5572
5573 /* Put relocation index. */
5574 bfd_put_32 (output_bfd, plt_index,
5575 (plt->contents + h->plt.offset
5576 + abed->plt_reloc_offset));
5577
5578 /* Put offset for jmp .PLT0 and check for overflow. We don't
5579 check relocation index for overflow since branch displacement
5580 will overflow first. */
5581 if (plt0_offset > 0x80000000)
5582 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5583 output_bfd, h->root.root.string);
5584 bfd_put_32 (output_bfd, - plt0_offset,
5585 plt->contents + h->plt.offset + plt_plt_offset);
5586 }
351f65ca 5587
aec6b87e
L		 5588 bed = get_elf_backend_data (output_bfd);
5589 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
5590 bed->s->swap_reloca_out (output_bfd, &rela, loc);
5591 }
dd7e64d4
L		 5592 }
5593 else if (eh->plt_got.offset != (bfd_vma) -1)
5594 {
5595 bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size;
5596 asection *plt, *got;
5597 bfd_boolean got_after_plt;
5598 int32_t got_pcrel_offset;
5599 const bfd_byte *got_plt_entry;
5600
5601 /* Set the entry in the GOT procedure linkage table. */
5602 plt = htab->plt_got;
5603 got = htab->elf.sgot;
5604 got_offset = h->got.offset;
5605
5606 if (got_offset == (bfd_vma) -1
5607 || h->type == STT_GNU_IFUNC
5608 || plt == NULL
5609 || got == NULL)
5610 abort ();
70256ad8 5611
dd7e64d4
L		 5612 /* Use the second PLT entry template for the GOT PLT since they
5613 are the identical. */
5614 plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size;
5615 plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset;
5616 if (eh->has_bnd_reloc)
5617 got_plt_entry = elf_x86_64_bnd_plt2_entry;
5618 else
70256ad8 5619 {
dd7e64d4
L		 5620 got_plt_entry = elf_x86_64_legacy_plt2_entry;
5621
5622 /* Subtract 1 since there is no BND prefix. */
5623 plt_got_insn_size -= 1;
5624 plt_got_offset -= 1;
70256ad8 5625 }
dd7e64d4
L		 5626
5627 /* Fill in the entry in the GOT procedure linkage table. */
5628 plt_offset = eh->plt_got.offset;
5629 memcpy (plt->contents + plt_offset,
5630 got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5631
5632 /* Put offset the PC-relative instruction referring to the GOT
5633 entry, subtracting the size of that instruction. */
5634 got_pcrel_offset = (got->output_section->vma
5635 + got->output_offset
5636 + got_offset
5637 - plt->output_section->vma
5638 - plt->output_offset
5639 - plt_offset
5640 - plt_got_insn_size);
5641
5642 /* Check PC-relative offset overflow in GOT PLT entry. */
5643 got_after_plt = got->output_section->vma > plt->output_section->vma;
5644 if ((got_after_plt && got_pcrel_offset < 0)
5645 || (!got_after_plt && got_pcrel_offset > 0))
5646 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5647 output_bfd, h->root.root.string);
5648
5649 bfd_put_32 (output_bfd, got_pcrel_offset,
5650 plt->contents + plt_offset + plt_got_offset);
5651 }
5652
aec6b87e
L		 5653 if (!local_undefweak
5654 && !h->def_regular
dd7e64d4
L		 5655 && (h->plt.offset != (bfd_vma) -1
5656 || eh->plt_got.offset != (bfd_vma) -1))
5657 {
5658 /* Mark the symbol as undefined, rather than as defined in
5659 the .plt section. Leave the value if there were any
5660 relocations where pointer equality matters (this is a clue
5661 for the dynamic linker, to make function pointer
5662 comparisons work between an application and shared
5663 library), otherwise set it to zero. If a function is only
5664 called from a binary, there is no need to slow down
5665 shared libraries because of that. */
5666 sym->st_shndx = SHN_UNDEF;
5667 if (!h->pointer_equality_needed)
5668 sym->st_value = 0;
70256ad8
AJ		 5669 }
5670
aec6b87e
L		 5671 /* Don't generate dynamic GOT relocation against undefined weak
5672 symbol in executable. */
bffbf940 5673 if (h->got.offset != (bfd_vma) -1
351f65ca 5674 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
aec6b87e
L		 5675 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE
5676 && !local_undefweak)
053579d7 5677 {
053579d7
AJ		 5678 Elf_Internal_Rela rela;
5679
5680 /* This symbol has an entry in the global offset table. Set it
bffbf940 5681 up. */
6de2ae4a 5682 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
c434dee6 5683 abort ();
053579d7 5684
6de2ae4a
L		 5685 rela.r_offset = (htab->elf.sgot->output_section->vma
5686 + htab->elf.sgot->output_offset
dc810e39 5687 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ		 5688
5689 /* If this is a static link, or it is a -Bsymbolic link and the
5690 symbol is defined locally or was forced to be local because
5691 of a version file, we just want to emit a RELATIVE reloc.
5692 The entry in the global offset table will already have been
5693 initialized in the relocate_section function. */
710ab287 5694 if (h->def_regular
0018b0a3
L		 5695 && h->type == STT_GNU_IFUNC)
5696 {
0e1862bb 5697 if (bfd_link_pic (info))
710ab287
L		 5698 {
5699 /* Generate R_X86_64_GLOB_DAT. */
5700 goto do_glob_dat;
5701 }
5702 else
5703 {
90d60710
L		 5704 asection *plt;
5705
710ab287
L		 5706 if (!h->pointer_equality_needed)
5707 abort ();
5708
5709 /* For non-shared object, we can't use .got.plt, which
5710 contains the real function addres if we need pointer
5711 equality. We load the GOT entry with the PLT entry. */
90d60710 5712 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L		 5713 bfd_put_64 (output_bfd, (plt->output_section->vma
5714 + plt->output_offset
5715 + h->plt.offset),
6de2ae4a 5716 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 5717 return TRUE;
5718 }
0018b0a3 5719 }
0e1862bb 5720 else if (bfd_link_pic (info)
0018b0a3 5721 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 5722 {
41bed6dd
L		 5723 if (!h->def_regular)
5724 return FALSE;
cc78d0af 5725 BFD_ASSERT((h->got.offset & 1) != 0);
351f65ca 5726 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
053579d7
AJ		 5727 rela.r_addend = (h->root.u.def.value
5728 + h->root.u.def.section->output_section->vma
5729 + h->root.u.def.section->output_offset);
5730 }
5731 else
5732 {
5733 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 5734do_glob_dat:
c434dee6 5735 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 5736 htab->elf.sgot->contents + h->got.offset);
351f65ca 5737 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
053579d7
AJ		 5738 rela.r_addend = 0;
5739 }
5740
351f65ca 5741 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
053579d7
AJ		 5742 }
5743
f5385ebf 5744 if (h->needs_copy)
70256ad8 5745 {
70256ad8
AJ		 5746 Elf_Internal_Rela rela;
5747
5748 /* This symbol needs a copy reloc. Set it up. */
5749
c434dee6
AJ		 5750 if (h->dynindx == -1
5751 || (h->root.type != bfd_link_hash_defined
5752 && h->root.type != bfd_link_hash_defweak)
5753 || htab->srelbss == NULL)
5754 abort ();
70256ad8
AJ		 5755
5756 rela.r_offset = (h->root.u.def.value
5757 + h->root.u.def.section->output_section->vma
5758 + h->root.u.def.section->output_offset);
351f65ca 5759 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
70256ad8 5760 rela.r_addend = 0;
351f65ca 5761 elf_append_rela (output_bfd, htab->srelbss, &rela);
70256ad8
AJ		 5762 }
5763
b34976b6 5764 return TRUE;
70256ad8
AJ		 5765}
5766
c25bc9fc
L		 5767/* Finish up local dynamic symbol handling. We set the contents of
5768 various dynamic sections here. */
5769
5770static bfd_boolean
351f65ca 5771elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
c25bc9fc
L		 5772{
5773 struct elf_link_hash_entry *h
5774 = (struct elf_link_hash_entry *) *slot;
5775 struct bfd_link_info *info
eed180f8 5776 = (struct bfd_link_info *) inf;
c25bc9fc 5777
351f65ca 5778 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
c25bc9fc
L		 5779 info, h, NULL);
5780}
5781
aec6b87e
L		 5782/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5783 here since undefined weak symbol may not be dynamic and may not be
5784 called for elf_x86_64_finish_dynamic_symbol. */
5785
5786static bfd_boolean
5787elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5788 void *inf)
5789{
5790 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5791 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5792
5793 if (h->root.type != bfd_link_hash_undefweak
5794 || h->dynindx != -1)
5795 return TRUE;
5796
5797 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
5798 info, h, NULL);
5799}
5800
c434dee6
AJ		 5801/* Used to decide how to sort relocs in an optimal manner for the
5802 dynamic linker, before writing them out. */
5803
5804static enum elf_reloc_type_class
cae1fbbb 5805elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
7e612e98
AM		 5806 const asection *rel_sec ATTRIBUTE_UNUSED,
5807 const Elf_Internal_Rela *rela)
c434dee6 5808{
cae1fbbb
L		 5809 bfd *abfd = info->output_bfd;
5810 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5811 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
cae1fbbb 5812
d9e3b590
L		 5813 if (htab->elf.dynsym != NULL
5814 && htab->elf.dynsym->contents != NULL)
5815 {
5816 /* Check relocation against STT_GNU_IFUNC symbol if there are
5817 dynamic symbols. */
5818 unsigned long r_symndx = htab->r_sym (rela->r_info);
5819 Elf_Internal_Sym sym;
5820 if (!bed->s->swap_symbol_in (abfd,
5821 (htab->elf.dynsym->contents
5822 + r_symndx * bed->s->sizeof_sym),
5823 0, &sym))
5824 abort ();
5825
5826 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5827 return reloc_class_ifunc;
5828 }
cae1fbbb 5829
351f65ca 5830 switch ((int) ELF32_R_TYPE (rela->r_info))
c434dee6
AJ		 5831 {
5832 case R_X86_64_RELATIVE:
1da80baa 5833 case R_X86_64_RELATIVE64:
c434dee6
AJ		 5834 return reloc_class_relative;
5835 case R_X86_64_JUMP_SLOT:
5836 return reloc_class_plt;
5837 case R_X86_64_COPY:
5838 return reloc_class_copy;
5839 default:
5840 return reloc_class_normal;
5841 }
5842}
5843
70256ad8
AJ		 5844/* Finish up the dynamic sections. */
5845
b34976b6 5846static bfd_boolean
351f65ca
L		 5847elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
5848 struct bfd_link_info *info)
70256ad8 5849{
351f65ca 5850 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 5851 bfd *dynobj;
5852 asection *sdyn;
0ff2b86e 5853 const struct elf_x86_64_backend_data *abed;
70256ad8 5854
351f65ca 5855 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 5856 if (htab == NULL)
5857 return FALSE;
5858
0ff2b86e
L		 5859 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5860 section only if there is .plt section. */
5861 abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL
5862 ? &elf_x86_64_bnd_arch_bed
5863 : get_elf_x86_64_backend_data (output_bfd));
5864
c434dee6 5865 dynobj = htab->elf.dynobj;
3d4d4302 5866 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
70256ad8 5867
c434dee6 5868 if (htab->elf.dynamic_sections_created)
70256ad8 5869 {
82e96e07
L		 5870 bfd_byte *dyncon, *dynconend;
5871 const struct elf_backend_data *bed;
5872 bfd_size_type sizeof_dyn;
70256ad8 5873
6de2ae4a 5874 if (sdyn == NULL || htab->elf.sgot == NULL)
c434dee6 5875 abort ();
70256ad8 5876
82e96e07
L		 5877 bed = get_elf_backend_data (dynobj);
5878 sizeof_dyn = bed->s->sizeof_dyn;
5879 dyncon = sdyn->contents;
5880 dynconend = sdyn->contents + sdyn->size;
5881 for (; dyncon < dynconend; dyncon += sizeof_dyn)
70256ad8
AJ		 5882 {
5883 Elf_Internal_Dyn dyn;
70256ad8
AJ		 5884 asection *s;
5885
82e96e07 5886 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
70256ad8
AJ		 5887
5888 switch (dyn.d_tag)
5889 {
5890 default:
053579d7 5891 continue;
70256ad8
AJ		 5892
5893 case DT_PLTGOT:
6de2ae4a 5894 s = htab->elf.sgotplt;
8c37241b 5895 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
c434dee6 5896 break;
70256ad8
AJ		 5897
5898 case DT_JMPREL:
6de2ae4a 5899 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
c434dee6 5900 break;
70256ad8 5901
c434dee6 5902 case DT_PLTRELSZ:
6de2ae4a 5903 s = htab->elf.srelplt->output_section;
eea6121a 5904 dyn.d_un.d_val = s->size;
70256ad8
AJ		 5905 break;
5906
5907 case DT_RELASZ:
c434dee6
AJ		 5908 /* The procedure linkage table relocs (DT_JMPREL) should
5909 not be included in the overall relocs (DT_RELA).
5910 Therefore, we override the DT_RELASZ entry here to
5911 make it not include the JMPREL relocs. Since the
5912 linker script arranges for .rela.plt to follow all
5913 other relocation sections, we don't have to worry
5914 about changing the DT_RELA entry. */
6de2ae4a 5915 if (htab->elf.srelplt != NULL)
70256ad8 5916 {
6de2ae4a 5917 s = htab->elf.srelplt->output_section;
eea6121a 5918 dyn.d_un.d_val -= s->size;
70256ad8
AJ		 5919 }
5920 break;
67a4f2b7
AO		 5921
5922 case DT_TLSDESC_PLT:
6de2ae4a 5923 s = htab->elf.splt;
67a4f2b7
AO		 5924 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5925 + htab->tlsdesc_plt;
5926 break;
5927
5928 case DT_TLSDESC_GOT:
6de2ae4a 5929 s = htab->elf.sgot;
67a4f2b7
AO		 5930 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5931 + htab->tlsdesc_got;
5932 break;
70256ad8 5933 }
c434dee6 5934
82e96e07 5935 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
70256ad8
AJ		 5936 }
5937
c434dee6 5938 /* Fill in the special first entry in the procedure linkage table. */
6de2ae4a 5939 if (htab->elf.splt && htab->elf.splt->size > 0)
70256ad8 5940 {
653165cc 5941 /* Fill in the first entry in the procedure linkage table. */
eed180f8
RM		 5942 memcpy (htab->elf.splt->contents,
5943 abed->plt0_entry, abed->plt_entry_size);
653165cc
AJ		 5944 /* Add offset for pushq GOT+8(%rip), since the instruction
5945 uses 6 bytes subtract this value. */
5946 bfd_put_32 (output_bfd,
6de2ae4a
L		 5947 (htab->elf.sgotplt->output_section->vma
5948 + htab->elf.sgotplt->output_offset
653165cc 5949 + 8
6de2ae4a
L		 5950 - htab->elf.splt->output_section->vma
5951 - htab->elf.splt->output_offset
653165cc 5952 - 6),
eed180f8
RM		 5953 htab->elf.splt->contents + abed->plt0_got1_offset);
5954 /* Add offset for the PC-relative instruction accessing GOT+16,
5955 subtracting the offset to the end of that instruction. */
653165cc 5956 bfd_put_32 (output_bfd,
6de2ae4a
L		 5957 (htab->elf.sgotplt->output_section->vma
5958 + htab->elf.sgotplt->output_offset
653165cc 5959 + 16
6de2ae4a
L		 5960 - htab->elf.splt->output_section->vma
5961 - htab->elf.splt->output_offset
eed180f8
RM		 5962 - abed->plt0_got2_insn_end),
5963 htab->elf.splt->contents + abed->plt0_got2_offset);
653165cc 5964
eed180f8
RM		 5965 elf_section_data (htab->elf.splt->output_section)
5966 ->this_hdr.sh_entsize = abed->plt_entry_size;
67a4f2b7
AO		 5967
5968 if (htab->tlsdesc_plt)
5969 {
5970 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 5971 htab->elf.sgot->contents + htab->tlsdesc_got);
67a4f2b7 5972
6de2ae4a 5973 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
eed180f8 5974 abed->plt0_entry, abed->plt_entry_size);
67a4f2b7
AO		 5975
5976 /* Add offset for pushq GOT+8(%rip), since the
5977 instruction uses 6 bytes subtract this value. */
5978 bfd_put_32 (output_bfd,
6de2ae4a
L		 5979 (htab->elf.sgotplt->output_section->vma
5980 + htab->elf.sgotplt->output_offset
67a4f2b7 5981 + 8
6de2ae4a
L		 5982 - htab->elf.splt->output_section->vma
5983 - htab->elf.splt->output_offset
67a4f2b7
AO		 5984 - htab->tlsdesc_plt
5985 - 6),
eed180f8
RM		 5986 htab->elf.splt->contents
5987 + htab->tlsdesc_plt + abed->plt0_got1_offset);
5988 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5989 where TGD stands for htab->tlsdesc_got, subtracting the offset
5990 to the end of that instruction. */
67a4f2b7 5991 bfd_put_32 (output_bfd,
6de2ae4a
L		 5992 (htab->elf.sgot->output_section->vma
5993 + htab->elf.sgot->output_offset
67a4f2b7 5994 + htab->tlsdesc_got
6de2ae4a
L		 5995 - htab->elf.splt->output_section->vma
5996 - htab->elf.splt->output_offset
67a4f2b7 5997 - htab->tlsdesc_plt
eed180f8
RM		 5998 - abed->plt0_got2_insn_end),
5999 htab->elf.splt->contents
6000 + htab->tlsdesc_plt + abed->plt0_got2_offset);
67a4f2b7 6001 }
70256ad8 6002 }
70256ad8
AJ		 6003 }
6004
0ff2b86e
L		 6005 if (htab->plt_bnd != NULL)
6006 elf_section_data (htab->plt_bnd->output_section)
6007 ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry);
6008
6de2ae4a 6009 if (htab->elf.sgotplt)
70256ad8 6010 {
56d4289c
L		 6011 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
6012 {
6013 (*_bfd_error_handler)
6014 (_("discarded output section: `%A'"), htab->elf.sgotplt);
6015 return FALSE;
6016 }
6017
c434dee6 6018 /* Fill in the first three entries in the global offset table. */
6de2ae4a 6019 if (htab->elf.sgotplt->size > 0)
c434dee6
AJ		 6020 {
6021 /* Set the first entry in the global offset table to the address of
6022 the dynamic section. */
6023 if (sdyn == NULL)
6de2ae4a 6024 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
c434dee6
AJ		 6025 else
6026 bfd_put_64 (output_bfd,
6027 sdyn->output_section->vma + sdyn->output_offset,
6de2ae4a 6028 htab->elf.sgotplt->contents);
c434dee6 6029 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6de2ae4a
L		 6030 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
6031 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
c434dee6 6032 }
70256ad8 6033
6de2ae4a 6034 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
c434dee6
AJ		 6035 GOT_ENTRY_SIZE;
6036 }
70256ad8 6037
e41b3a13 6038 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 6039 if (htab->plt_eh_frame != NULL
6040 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 6041 {
6042 if (htab->elf.splt != NULL
6043 && htab->elf.splt->size != 0
6044 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
6045 && htab->elf.splt->output_section != NULL
6046 && htab->plt_eh_frame->output_section != NULL)
6047 {
6048 bfd_vma plt_start = htab->elf.splt->output_section->vma;
6049 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
6050 + htab->plt_eh_frame->output_offset
6051 + PLT_FDE_START_OFFSET;
6052 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6053 htab->plt_eh_frame->contents
6054 + PLT_FDE_START_OFFSET);
6055 }
dbaa2011 6056 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 6057 {
6058 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6059 htab->plt_eh_frame,
6060 htab->plt_eh_frame->contents))
6061 return FALSE;
6062 }
6063 }
6064
6de2ae4a
L		 6065 if (htab->elf.sgot && htab->elf.sgot->size > 0)
6066 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
8c37241b
JJ		 6067 = GOT_ENTRY_SIZE;
6068
c25bc9fc
L		 6069 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6070 htab_traverse (htab->loc_hash_table,
351f65ca 6071 elf_x86_64_finish_local_dynamic_symbol,
c25bc9fc
L		 6072 info);
6073
aec6b87e
L		 6074 /* Fill PLT entries for undefined weak symbols in PIE. */
6075 if (bfd_link_pie (info))
6076 bfd_hash_traverse (&info->hash->table,
6077 elf_x86_64_pie_finish_undefweak_symbol,
6078 info);
6079
b34976b6 6080 return TRUE;
8d88c4ca
NC		 6081}
6082
3972882e 6083/* Return an array of PLT entry symbol values. */
4c45e5c9 6084
3972882e
L		 6085static bfd_vma *
6086elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
6087 asection *relplt)
4c45e5c9 6088{
3972882e
L		 6089 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6090 arelent *p;
6091 long count, i;
6092 bfd_vma *plt_sym_val;
144bed8d 6093 bfd_vma plt_offset;
3972882e
L		 6094 bfd_byte *plt_contents;
6095 const struct elf_x86_64_backend_data *bed;
6096 Elf_Internal_Shdr *hdr;
6097 asection *plt_bnd;
144bed8d 6098
3972882e
L		 6099 /* Get the .plt section contents. PLT passed down may point to the
6100 .plt.bnd section. Make sure that PLT always points to the .plt
6101 section. */
6102 plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd");
6103 if (plt_bnd)
6104 {
6105 if (plt != plt_bnd)
6106 abort ();
6107 plt = bfd_get_section_by_name (abfd, ".plt");
6108 if (plt == NULL)
6109 abort ();
6110 bed = &elf_x86_64_bnd_arch_bed;
6111 }
6112 else
6113 bed = get_elf_x86_64_backend_data (abfd);
cca5b8b6 6114
3972882e
L		 6115 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6116 if (plt_contents == NULL)
6117 return NULL;
6118 if (!bfd_get_section_contents (abfd, (asection *) plt,
6119 plt_contents, 0, plt->size))
144bed8d 6120 {
3972882e
L		 6121bad_return:
6122 free (plt_contents);
6123 return NULL;
144bed8d
L		 6124 }
6125
3972882e
L		 6126 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6127 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
6128 goto bad_return;
144bed8d 6129
3972882e
L		 6130 hdr = &elf_section_data (relplt)->this_hdr;
6131 count = relplt->size / hdr->sh_entsize;
144bed8d 6132
3972882e
L		 6133 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
6134 if (plt_sym_val == NULL)
6135 goto bad_return;
cca5b8b6 6136
35181b3e 6137 for (i = 0; i < count; i++)
3972882e 6138 plt_sym_val[i] = -1;
cca5b8b6 6139
3972882e
L		 6140 plt_offset = bed->plt_entry_size;
6141 p = relplt->relocation;
6142 for (i = 0; i < count; i++, p++)
144bed8d 6143 {
3972882e 6144 long reloc_index;
144bed8d 6145
6f25f223 6146 /* Skip unknown relocation. */
533d0af0 6147 if (p->howto == NULL)
6f25f223 6148 continue;
533d0af0 6149
3972882e
L		 6150 if (p->howto->type != R_X86_64_JUMP_SLOT
6151 && p->howto->type != R_X86_64_IRELATIVE)
6152 continue;
144bed8d 6153
3972882e
L		 6154 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
6155 + bed->plt_reloc_offset));
ec1f73bb 6156 if (reloc_index < count)
144bed8d 6157 {
ec1f73bb
AM		 6158 if (plt_bnd)
6159 {
6160 /* This is the index in .plt section. */
6161 long plt_index = plt_offset / bed->plt_entry_size;
6162 /* Store VMA + the offset in .plt.bnd section. */
6163 plt_sym_val[reloc_index] =
6164 (plt_bnd->vma
6165 + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry));
6166 }
6167 else
6168 plt_sym_val[reloc_index] = plt->vma + plt_offset;
144bed8d
L		 6169 }
6170 plt_offset += bed->plt_entry_size;
fca6ae69
L		 6171
6172 /* PR binutils/18437: Skip extra relocations in the .rela.plt
6173 section. */
6174 if (plt_offset >= plt->size)
6175 break;
144bed8d
L		 6176 }
6177
3972882e
L		 6178 free (plt_contents);
6179
6180 return plt_sym_val;
4c45e5c9 6181}
8df9fc9d 6182
0ff2b86e
L		 6183/* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
6184 support. */
6185
6186static long
6187elf_x86_64_get_synthetic_symtab (bfd *abfd,
6188 long symcount,
6189 asymbol **syms,
6190 long dynsymcount,
6191 asymbol **dynsyms,
6192 asymbol **ret)
6193{
3972882e
L		 6194 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
6195 as PLT if it exists. */
6196 asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd");
0ff2b86e 6197 if (plt == NULL)
3972882e
L		 6198 plt = bfd_get_section_by_name (abfd, ".plt");
6199 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
6200 dynsymcount, dynsyms, ret,
6201 plt,
6202 elf_x86_64_get_plt_sym_val);
0ff2b86e
L		 6203}
6204
d2b2c203
DJ		 6205/* Handle an x86-64 specific section when reading an object file. This
6206 is called when elfcode.h finds a section with an unknown type. */
6207
6208static bfd_boolean
0c723101
L		 6209elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
6210 const char *name, int shindex)
d2b2c203
DJ		 6211{
6212 if (hdr->sh_type != SHT_X86_64_UNWIND)
6213 return FALSE;
6214
6dc132d9 6215 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
d2b2c203
DJ		 6216 return FALSE;
6217
6218 return TRUE;
6219}
6220
3b22753a
L		 6221/* Hook called by the linker routine which adds symbols from an object
6222 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
6223 of .bss. */
6224
6225static bfd_boolean
351f65ca
L		 6226elf_x86_64_add_symbol_hook (bfd *abfd,
6227 struct bfd_link_info *info,
6228 Elf_Internal_Sym *sym,
6229 const char **namep ATTRIBUTE_UNUSED,
6230 flagword *flagsp ATTRIBUTE_UNUSED,
6231 asection **secp,
6232 bfd_vma *valp)
3b22753a
L		 6233{
6234 asection *lcomm;
6235
6236 switch (sym->st_shndx)
6237 {
6238 case SHN_X86_64_LCOMMON:
6239 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
6240 if (lcomm == NULL)
6241 {
6242 lcomm = bfd_make_section_with_flags (abfd,
6243 "LARGE_COMMON",
6244 (SEC_ALLOC
6245 | SEC_IS_COMMON
6246 | SEC_LINKER_CREATED));
6247 if (lcomm == NULL)
6248 return FALSE;
6249 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
6250 }
6251 *secp = lcomm;
6252 *valp = sym->st_size;
c35bdf6e 6253 return TRUE;
3b22753a 6254 }
d8045f23 6255
13a2df29 6256 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
f1885d1e
AM		 6257 && (abfd->flags & DYNAMIC) == 0
6258 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
13a2df29
L		 6259 elf_tdata (info->output_bfd)->has_gnu_symbols
6260 |= elf_gnu_symbol_unique;
d8045f23 6261
3b22753a
L		 6262 return TRUE;
6263}
6264
6265
6266/* Given a BFD section, try to locate the corresponding ELF section
6267 index. */
6268
6269static bfd_boolean
351f65ca
L		 6270elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
6271 asection *sec, int *index_return)
3b22753a
L		 6272{
6273 if (sec == &_bfd_elf_large_com_section)
6274 {
91d6fa6a 6275 *index_return = SHN_X86_64_LCOMMON;
3b22753a
L		 6276 return TRUE;
6277 }
6278 return FALSE;
6279}
6280
6281/* Process a symbol. */
6282
6283static void
351f65ca
L		 6284elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
6285 asymbol *asym)
3b22753a
L		 6286{
6287 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
6288
6289 switch (elfsym->internal_elf_sym.st_shndx)
6290 {
6291 case SHN_X86_64_LCOMMON:
6292 asym->section = &_bfd_elf_large_com_section;
6293 asym->value = elfsym->internal_elf_sym.st_size;
6294 /* Common symbol doesn't set BSF_GLOBAL. */
6295 asym->flags &= ~BSF_GLOBAL;
6296 break;
6297 }
6298}
6299
6300static bfd_boolean
351f65ca 6301elf_x86_64_common_definition (Elf_Internal_Sym *sym)
3b22753a
L		 6302{
6303 return (sym->st_shndx == SHN_COMMON
6304 || sym->st_shndx == SHN_X86_64_LCOMMON);
6305}
6306
6307static unsigned int
351f65ca 6308elf_x86_64_common_section_index (asection *sec)
3b22753a
L		 6309{
6310 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6311 return SHN_COMMON;
6312 else
6313 return SHN_X86_64_LCOMMON;
6314}
6315
6316static asection *
351f65ca 6317elf_x86_64_common_section (asection *sec)
3b22753a
L		 6318{
6319 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6320 return bfd_com_section_ptr;
6321 else
6322 return &_bfd_elf_large_com_section;
6323}
6324
6325static bfd_boolean
5d13b3b3
AM		 6326elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
6327 const Elf_Internal_Sym *sym,
351f65ca 6328 asection **psec,
5d13b3b3
AM		 6329 bfd_boolean newdef,
6330 bfd_boolean olddef,
351f65ca 6331 bfd *oldbfd,
5d13b3b3 6332 const asection *oldsec)
3b22753a
L		 6333{
6334 /* A normal common symbol and a large common symbol result in a
00492999
L		 6335 normal common symbol. We turn the large common symbol into a
6336 normal one. */
5d13b3b3 6337 if (!olddef
3b22753a 6338 && h->root.type == bfd_link_hash_common
5d13b3b3
AM		 6339 && !newdef
6340 && bfd_is_com_section (*psec)
6341 && oldsec != *psec)
3b22753a 6342 {
00492999 6343 if (sym->st_shndx == SHN_COMMON
5d13b3b3 6344 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
00492999
L		 6345 {
6346 h->root.u.c.p->section
6347 = bfd_make_section_old_way (oldbfd, "COMMON");
6348 h->root.u.c.p->section->flags = SEC_ALLOC;
6349 }
6350 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5d13b3b3
AM		 6351 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
6352 *psec = bfd_com_section_ptr;
3b22753a
L		 6353 }
6354
6355 return TRUE;
6356}
6357
6358static int
351f65ca
L		 6359elf_x86_64_additional_program_headers (bfd *abfd,
6360 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3b22753a
L		 6361{
6362 asection *s;
9a2e389a 6363 int count = 0;
3b22753a
L		 6364
6365 /* Check to see if we need a large readonly segment. */
6366 s = bfd_get_section_by_name (abfd, ".lrodata");
6367 if (s && (s->flags & SEC_LOAD))
6368 count++;
6369
6370 /* Check to see if we need a large data segment. Since .lbss sections
6371 is placed right after the .bss section, there should be no need for
6372 a large data segment just because of .lbss. */
6373 s = bfd_get_section_by_name (abfd, ".ldata");
6374 if (s && (s->flags & SEC_LOAD))
6375 count++;
6376
6377 return count;
6378}
6379
fdc90cb4
JJ		 6380/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6381
6382static bfd_boolean
351f65ca 6383elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
fdc90cb4
JJ		 6384{
6385 if (h->plt.offset != (bfd_vma) -1
6386 && !h->def_regular
6387 && !h->pointer_equality_needed)
6388 return FALSE;
6389
6390 return _bfd_elf_hash_symbol (h);
6391}
6392
c543bf9a
L		 6393/* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
6394
6395static bfd_boolean
6396elf_x86_64_relocs_compatible (const bfd_target *input,
6397 const bfd_target *output)
6398{
6399 return ((xvec_get_elf_backend_data (input)->s->elfclass
6400 == xvec_get_elf_backend_data (output)->s->elfclass)
6401 && _bfd_elf_relocs_compatible (input, output));
6402}
6403
9a2e389a 6404static const struct bfd_elf_special_section
351f65ca 6405 elf_x86_64_special_sections[]=
3b22753a 6406{
0112cd26
NC		 6407 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6408 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6409 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
6410 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6411 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6412 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6413 { NULL, 0, 0, 0, 0 }
3b22753a
L		 6414};
6415
6d00b590 6416#define TARGET_LITTLE_SYM x86_64_elf64_vec
70256ad8
AJ		 6417#define TARGET_LITTLE_NAME "elf64-x86-64"
6418#define ELF_ARCH bfd_arch_i386
ae95ffa6 6419#define ELF_TARGET_ID X86_64_ELF_DATA
70256ad8 6420#define ELF_MACHINE_CODE EM_X86_64
f7661549 6421#define ELF_MAXPAGESIZE 0x200000
2043964e 6422#define ELF_MINPAGESIZE 0x1000
24718e3b 6423#define ELF_COMMONPAGESIZE 0x1000
70256ad8
AJ		 6424
6425#define elf_backend_can_gc_sections 1
51b64d56 6426#define elf_backend_can_refcount 1
70256ad8
AJ		 6427#define elf_backend_want_got_plt 1
6428#define elf_backend_plt_readonly 1
6429#define elf_backend_want_plt_sym 0
6430#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 6431#define elf_backend_rela_normal 1
e41b3a13 6432#define elf_backend_plt_alignment 4
f7483970 6433#define elf_backend_extern_protected_data 1
70256ad8 6434
351f65ca 6435#define elf_info_to_howto elf_x86_64_info_to_howto
70256ad8 6436
70256ad8 6437#define bfd_elf64_bfd_link_hash_table_create \
351f65ca 6438 elf_x86_64_link_hash_table_create
351f65ca 6439#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
157090f7 6440#define bfd_elf64_bfd_reloc_name_lookup \
351f65ca 6441 elf_x86_64_reloc_name_lookup
70256ad8 6442
351f65ca 6443#define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
c543bf9a 6444#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
351f65ca
L		 6445#define elf_backend_check_relocs elf_x86_64_check_relocs
6446#define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
6447#define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
6448#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6449#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6450#define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
351f65ca
L		 6451#define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6452#define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
8fd79e71
L		 6453#ifdef CORE_HEADER
6454#define elf_backend_write_core_note elf_x86_64_write_core_note
6455#endif
351f65ca
L		 6456#define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6457#define elf_backend_relocate_section elf_x86_64_relocate_section
6458#define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6459#define elf_backend_always_size_sections elf_x86_64_always_size_sections
74541ad4 6460#define elf_backend_init_index_section _bfd_elf_init_1_index_section
407443a3 6461#define elf_backend_object_p elf64_x86_64_elf_object_p
351f65ca 6462#define bfd_elf64_mkobject elf_x86_64_mkobject
0ff2b86e 6463#define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
8d88c4ca 6464
d2b2c203 6465#define elf_backend_section_from_shdr \
351f65ca 6466 elf_x86_64_section_from_shdr
d2b2c203 6467
3b22753a 6468#define elf_backend_section_from_bfd_section \
351f65ca 6469 elf_x86_64_elf_section_from_bfd_section
3b22753a 6470#define elf_backend_add_symbol_hook \
351f65ca 6471 elf_x86_64_add_symbol_hook
3b22753a 6472#define elf_backend_symbol_processing \
351f65ca 6473 elf_x86_64_symbol_processing
3b22753a 6474#define elf_backend_common_section_index \
351f65ca 6475 elf_x86_64_common_section_index
3b22753a 6476#define elf_backend_common_section \
351f65ca 6477 elf_x86_64_common_section
3b22753a 6478#define elf_backend_common_definition \
351f65ca 6479 elf_x86_64_common_definition
3b22753a 6480#define elf_backend_merge_symbol \
351f65ca 6481 elf_x86_64_merge_symbol
3b22753a 6482#define elf_backend_special_sections \
351f65ca 6483 elf_x86_64_special_sections
3b22753a 6484#define elf_backend_additional_program_headers \
351f65ca 6485 elf_x86_64_additional_program_headers
fdc90cb4 6486#define elf_backend_hash_symbol \
351f65ca 6487 elf_x86_64_hash_symbol
8f79b794
L		 6488#define elf_backend_omit_section_dynsym \
6489 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
aec6b87e
L		 6490#define elf_backend_fixup_symbol \
6491 elf_x86_64_fixup_symbol
3b22753a 6492
8d88c4ca 6493#include "elf64-target.h"
9d7cbccd 6494
6036f486
ES		 6495/* CloudABI support. */
6496
6497#undef TARGET_LITTLE_SYM
6498#define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6499#undef TARGET_LITTLE_NAME
6500#define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6501
6502#undef ELF_OSABI
6503#define ELF_OSABI ELFOSABI_CLOUDABI
6504
6505#undef elf64_bed
6506#define elf64_bed elf64_x86_64_cloudabi_bed
6507
6508#include "elf64-target.h"
6509
9d7cbccd
NC		 6510/* FreeBSD support. */
6511
6512#undef TARGET_LITTLE_SYM
6d00b590 6513#define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
9d7cbccd
NC		 6514#undef TARGET_LITTLE_NAME
6515#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6516
d1036acb
L		 6517#undef ELF_OSABI
6518#define ELF_OSABI ELFOSABI_FREEBSD
9d7cbccd 6519
9d7cbccd
NC		 6520#undef elf64_bed
6521#define elf64_bed elf64_x86_64_fbsd_bed
6522
6523#include "elf64-target.h"
8a9036a4 6524
a6cc6b3b
RO		 6525/* Solaris 2 support. */
6526
6527#undef TARGET_LITTLE_SYM
6d00b590 6528#define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
a6cc6b3b
RO		 6529#undef TARGET_LITTLE_NAME
6530#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6531
6532/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6533 objects won't be recognized. */
6534#undef ELF_OSABI
6535
6536#undef elf64_bed
6537#define elf64_bed elf64_x86_64_sol2_bed
6538
7dc98aea
RO		 6539/* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6540 boundary. */
84865015 6541#undef elf_backend_static_tls_alignment
7dc98aea
RO		 6542#define elf_backend_static_tls_alignment 16
6543
a6cc6b3b
RO		 6544/* The Solaris 2 ABI requires a plt symbol on all platforms.
6545
6546 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6547 File, p.63. */
84865015 6548#undef elf_backend_want_plt_sym
a6cc6b3b
RO		 6549#define elf_backend_want_plt_sym 1
6550
84865015
NC		 6551#undef elf_backend_strtab_flags
6552#define elf_backend_strtab_flags SHF_STRINGS
6553
6554static bfd_boolean
5522f910
NC		 6555elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
6556 bfd *obfd ATTRIBUTE_UNUSED,
6557 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
6558 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
84865015
NC		 6559{
6560 /* PR 19938: FIXME: Need to add code for setting the sh_info
6561 and sh_link fields of Solaris specific section types. */
6562 return FALSE;
6563}
6564
5522f910
NC		 6565#undef elf_backend_copy_special_section_fields
6566#define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
84865015 6567
a6cc6b3b
RO		 6568#include "elf64-target.h"
6569
8059fb19
RM		 6570/* Native Client support. */
6571
64b384e1
RM		 6572static bfd_boolean
6573elf64_x86_64_nacl_elf_object_p (bfd *abfd)
6574{
6575 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6576 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
6577 return TRUE;
6578}
6579
8059fb19 6580#undef TARGET_LITTLE_SYM
6d00b590 6581#define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
8059fb19
RM		 6582#undef TARGET_LITTLE_NAME
6583#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6584#undef elf64_bed
6585#define elf64_bed elf64_x86_64_nacl_bed
6586
6587#undef ELF_MAXPAGESIZE
6588#undef ELF_MINPAGESIZE
6589#undef ELF_COMMONPAGESIZE
6590#define ELF_MAXPAGESIZE 0x10000
6591#define ELF_MINPAGESIZE 0x10000
6592#define ELF_COMMONPAGESIZE 0x10000
6593
6594/* Restore defaults. */
6595#undef ELF_OSABI
6596#undef elf_backend_static_tls_alignment
6597#undef elf_backend_want_plt_sym
6598#define elf_backend_want_plt_sym 0
84865015 6599#undef elf_backend_strtab_flags
5522f910 6600#undef elf_backend_copy_special_section_fields
8059fb19
RM		 6601
6602/* NaCl uses substantially different PLT entries for the same effects. */
6603
6604#undef elf_backend_plt_alignment
6605#define elf_backend_plt_alignment 5
6606#define NACL_PLT_ENTRY_SIZE 64
6607#define NACLMASK 0xe0 /* 32-byte alignment mask. */
6608
6609static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
6610 {
6611 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6612 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6613 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6614 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6615 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6616
ea2d813e 6617 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
70cc877f 6618 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
ea2d813e
RM		 6619
6620 /* 32 bytes of nop to pad out to the standard size. */
8059fb19
RM		 6621 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6622 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6623 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6624 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
ea2d813e
RM		 6625 0x66, /* excess data32 prefix */
6626 0x90 /* nop */
8059fb19
RM		 6627 };
6628
6629static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6630 {
6631 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6632 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6633 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6634 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6635
6636 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6637 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6638 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6639
6640 /* Lazy GOT entries point here (32-byte aligned). */
6641 0x68, /* pushq immediate */
6642 0, 0, 0, 0, /* replaced with index into relocation table. */
6643 0xe9, /* jmp relative */
6644 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6645
6646 /* 22 bytes of nop to pad out to the standard size. */
6647 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6648 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6649 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6650 };
6651
6652/* .eh_frame covering the .plt section. */
6653
6654static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
6655 {
6656#if (PLT_CIE_LENGTH != 20 \
6657 || PLT_FDE_LENGTH != 36 \
6658 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6659 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6660# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6661#endif
6662 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6663 0, 0, 0, 0, /* CIE ID */
6664 1, /* CIE version */
6665 'z', 'R', 0, /* Augmentation string */
6666 1, /* Code alignment factor */
6667 0x78, /* Data alignment factor */
6668 16, /* Return address column */
6669 1, /* Augmentation size */
6670 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6671 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6672 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6673 DW_CFA_nop, DW_CFA_nop,
6674
6675 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6676 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
6677 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6678 0, 0, 0, 0, /* .plt size goes here */
6679 0, /* Augmentation size */
6680 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
6681 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6682 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
6683 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6684 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6685 13, /* Block length */
6686 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
6687 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
6688 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6689 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
6690 DW_CFA_nop, DW_CFA_nop
6691 };
6692
6693static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
6694 {
6695 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
6696 elf_x86_64_nacl_plt_entry, /* plt_entry */
6697 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6698 2, /* plt0_got1_offset */
6699 9, /* plt0_got2_offset */
6700 13, /* plt0_got2_insn_end */
6701 3, /* plt_got_offset */
6702 33, /* plt_reloc_offset */
6703 38, /* plt_plt_offset */
6704 7, /* plt_got_insn_size */
6705 42, /* plt_plt_insn_end */
6706 32, /* plt_lazy_offset */
6707 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
6708 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
6709 };
6710
6711#undef elf_backend_arch_data
6712#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6713
64b384e1
RM		 6714#undef elf_backend_object_p
6715#define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5a68afcf
RM		 6716#undef elf_backend_modify_segment_map
6717#define elf_backend_modify_segment_map nacl_modify_segment_map
6718#undef elf_backend_modify_program_headers
6719#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 6720#undef elf_backend_final_write_processing
6721#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 6722
8059fb19
RM		 6723#include "elf64-target.h"
6724
6725/* Native Client x32 support. */
6726
64b384e1
RM		 6727static bfd_boolean
6728elf32_x86_64_nacl_elf_object_p (bfd *abfd)
6729{
6730 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6731 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
6732 return TRUE;
6733}
6734
8059fb19 6735#undef TARGET_LITTLE_SYM
6d00b590 6736#define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
8059fb19
RM		 6737#undef TARGET_LITTLE_NAME
6738#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6739#undef elf32_bed
6740#define elf32_bed elf32_x86_64_nacl_bed
6741
6742#define bfd_elf32_bfd_link_hash_table_create \
6743 elf_x86_64_link_hash_table_create
8059fb19
RM		 6744#define bfd_elf32_bfd_reloc_type_lookup \
6745 elf_x86_64_reloc_type_lookup
6746#define bfd_elf32_bfd_reloc_name_lookup \
6747 elf_x86_64_reloc_name_lookup
6748#define bfd_elf32_mkobject \
6749 elf_x86_64_mkobject
b7365e5d
L		 6750#define bfd_elf32_get_synthetic_symtab \
6751 elf_x86_64_get_synthetic_symtab
8059fb19
RM		 6752
6753#undef elf_backend_object_p
6754#define elf_backend_object_p \
64b384e1 6755 elf32_x86_64_nacl_elf_object_p
8059fb19
RM		 6756
6757#undef elf_backend_bfd_from_remote_memory
6758#define elf_backend_bfd_from_remote_memory \
6759 _bfd_elf32_bfd_from_remote_memory
6760
6761#undef elf_backend_size_info
6762#define elf_backend_size_info \
6763 _bfd_elf32_size_info
6764
6765#include "elf32-target.h"
6766
6767/* Restore defaults. */
5a68afcf 6768#undef elf_backend_object_p
8059fb19 6769#define elf_backend_object_p elf64_x86_64_elf_object_p
5a68afcf
RM		 6770#undef elf_backend_bfd_from_remote_memory
6771#undef elf_backend_size_info
6772#undef elf_backend_modify_segment_map
6773#undef elf_backend_modify_program_headers
887badb3 6774#undef elf_backend_final_write_processing
8059fb19 6775
8a9036a4
L		 6776/* Intel L1OM support. */
6777
6778static bfd_boolean
6779elf64_l1om_elf_object_p (bfd *abfd)
6780{
6781 /* Set the right machine number for an L1OM elf64 file. */
6782 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
6783 return TRUE;
6784}
6785
6786#undef TARGET_LITTLE_SYM
6d00b590 6787#define TARGET_LITTLE_SYM l1om_elf64_vec
8a9036a4
L		 6788#undef TARGET_LITTLE_NAME
6789#define TARGET_LITTLE_NAME "elf64-l1om"
6790#undef ELF_ARCH
6791#define ELF_ARCH bfd_arch_l1om
6792
6793#undef ELF_MACHINE_CODE
6794#define ELF_MACHINE_CODE EM_L1OM
6795
6796#undef ELF_OSABI
6797
6798#undef elf64_bed
6799#define elf64_bed elf64_l1om_bed
6800
6801#undef elf_backend_object_p
6802#define elf_backend_object_p elf64_l1om_elf_object_p
6803
8059fb19
RM		 6804/* Restore defaults. */
6805#undef ELF_MAXPAGESIZE
6806#undef ELF_MINPAGESIZE
6807#undef ELF_COMMONPAGESIZE
6808#define ELF_MAXPAGESIZE 0x200000
6809#define ELF_MINPAGESIZE 0x1000
6810#define ELF_COMMONPAGESIZE 0x1000
6811#undef elf_backend_plt_alignment
6812#define elf_backend_plt_alignment 4
6813#undef elf_backend_arch_data
6814#define elf_backend_arch_data &elf_x86_64_arch_bed
1a0c107f 6815
8a9036a4
L		 6816#include "elf64-target.h"
6817
6818/* FreeBSD L1OM support. */
6819
6820#undef TARGET_LITTLE_SYM
6d00b590 6821#define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
8a9036a4
L		 6822#undef TARGET_LITTLE_NAME
6823#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6824
6825#undef ELF_OSABI
6826#define ELF_OSABI ELFOSABI_FREEBSD
6827
6828#undef elf64_bed
6829#define elf64_bed elf64_l1om_fbsd_bed
6830
8a9036a4 6831#include "elf64-target.h"
351f65ca 6832
7a9068fe
L		 6833/* Intel K1OM support. */
6834
6835static bfd_boolean
6836elf64_k1om_elf_object_p (bfd *abfd)
6837{
6838 /* Set the right machine number for an K1OM elf64 file. */
6839 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
6840 return TRUE;
6841}
6842
6843#undef TARGET_LITTLE_SYM
6d00b590 6844#define TARGET_LITTLE_SYM k1om_elf64_vec
7a9068fe
L		 6845#undef TARGET_LITTLE_NAME
6846#define TARGET_LITTLE_NAME "elf64-k1om"
6847#undef ELF_ARCH
6848#define ELF_ARCH bfd_arch_k1om
6849
6850#undef ELF_MACHINE_CODE
6851#define ELF_MACHINE_CODE EM_K1OM
6852
6853#undef ELF_OSABI
6854
6855#undef elf64_bed
6856#define elf64_bed elf64_k1om_bed
6857
6858#undef elf_backend_object_p
6859#define elf_backend_object_p elf64_k1om_elf_object_p
6860
6861#undef elf_backend_static_tls_alignment
6862
6863#undef elf_backend_want_plt_sym
6864#define elf_backend_want_plt_sym 0
6865
6866#include "elf64-target.h"
6867
6868/* FreeBSD K1OM support. */
6869
6870#undef TARGET_LITTLE_SYM
6d00b590 6871#define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
7a9068fe
L		 6872#undef TARGET_LITTLE_NAME
6873#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6874
6875#undef ELF_OSABI
6876#define ELF_OSABI ELFOSABI_FREEBSD
6877
6878#undef elf64_bed
6879#define elf64_bed elf64_k1om_fbsd_bed
6880
6881#include "elf64-target.h"
6882
351f65ca
L		 6883/* 32bit x86-64 support. */
6884
351f65ca 6885#undef TARGET_LITTLE_SYM
6d00b590 6886#define TARGET_LITTLE_SYM x86_64_elf32_vec
351f65ca
L		 6887#undef TARGET_LITTLE_NAME
6888#define TARGET_LITTLE_NAME "elf32-x86-64"
8059fb19 6889#undef elf32_bed
351f65ca
L		 6890
6891#undef ELF_ARCH
6892#define ELF_ARCH bfd_arch_i386
6893
6894#undef ELF_MACHINE_CODE
6895#define ELF_MACHINE_CODE EM_X86_64
6896
351f65ca
L		 6897#undef ELF_OSABI
6898
351f65ca
L		 6899#undef elf_backend_object_p
6900#define elf_backend_object_p \
6901 elf32_x86_64_elf_object_p
6902
6903#undef elf_backend_bfd_from_remote_memory
6904#define elf_backend_bfd_from_remote_memory \
6905 _bfd_elf32_bfd_from_remote_memory
6906
6907#undef elf_backend_size_info
6908#define elf_backend_size_info \
6909 _bfd_elf32_size_info
6910
6911#include "elf32-target.h"
GDB Binutils - Deliverables
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