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Fixes for unpredictable nops and 26-bit versions of teq,tst,cmn,cmp.
[binutils.git] / bfd / elf64-x86-64.c
CommitLineData
351f65ca 1/* X86-64 specific support for ELF
b90efa5b 2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
8d88c4ca
NC		 3 Contributed by Jan Hubicka <[email protected]>.
4
ae9a127f 5 This file is part of BFD, the Binary File Descriptor library.
8d88c4ca 6
ae9a127f
NC		 7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
cd123cb7 9 the Free Software Foundation; either version 3 of the License, or
ae9a127f 10 (at your option) any later version.
8d88c4ca 11
ae9a127f
NC		 12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
8d88c4ca 16
ae9a127f
NC		 17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
cd123cb7
NC		 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
8d88c4ca 21
8d88c4ca 22#include "sysdep.h"
3db64b00 23#include "bfd.h"
c434dee6 24#include "bfdlink.h"
8d88c4ca
NC		 25#include "libbfd.h"
26#include "elf-bfd.h"
5a68afcf 27#include "elf-nacl.h"
142411ca 28#include "bfd_stdint.h"
c25bc9fc
L		 29#include "objalloc.h"
30#include "hashtab.h"
e41b3a13 31#include "dwarf2.h"
d7921315 32#include "libiberty.h"
8d88c4ca
NC		 33
34#include "elf/x86-64.h"
35
8fd79e71
L		 36#ifdef CORE_HEADER
37#include <stdarg.h>
38#include CORE_HEADER
39#endif
40
8d88c4ca
NC		 41/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
42#define MINUS_ONE (~ (bfd_vma) 0)
43
351f65ca
L		 44/* Since both 32-bit and 64-bit x86-64 encode relocation type in the
45 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
46 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
47 since they are the same. */
48
49#define ABI_64_P(abfd) \
50 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
51
8d88c4ca 52/* The relocation "howto" table. Order of fields:
7b81dfbb
AJ		 53 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
54 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
70256ad8
AJ		 55static reloc_howto_type x86_64_elf_howto_table[] =
56{
6346d5ca 57 HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
b34976b6
AM		 58 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
59 FALSE),
60 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
62 FALSE),
63 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
64 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
65 TRUE),
66 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
67 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
68 FALSE),
69 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
70 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
71 TRUE),
72 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
74 FALSE),
75 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
77 MINUS_ONE, FALSE),
78 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
80 MINUS_ONE, FALSE),
81 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
83 MINUS_ONE, FALSE),
84 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
85 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
86 0xffffffff, TRUE),
87 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
88 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
89 FALSE),
90 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
91 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
92 FALSE),
93 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
b0360d8c 95 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
b34976b6 96 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
ac2aa337 97 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
b34976b6
AM		 98 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
99 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
100 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
101 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
103 MINUS_ONE, FALSE),
104 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
106 MINUS_ONE, FALSE),
107 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
109 MINUS_ONE, FALSE),
110 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
112 0xffffffff, TRUE),
113 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
114 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
115 0xffffffff, TRUE),
ac2aa337 116 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
b34976b6
AM		 117 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
118 0xffffffff, FALSE),
119 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
120 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
121 0xffffffff, TRUE),
122 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
123 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
124 0xffffffff, FALSE),
d6ab8113
JB		 125 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
127 TRUE),
128 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
130 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
131 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
132 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
133 FALSE, 0xffffffff, 0xffffffff, TRUE),
7b81dfbb
AJ		 134 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
135 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
136 FALSE),
137 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
138 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
139 MINUS_ONE, TRUE),
140 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
141 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
142 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
143 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
144 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
145 MINUS_ONE, FALSE),
146 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
147 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
148 MINUS_ONE, FALSE),
1788fc08
L		 149 HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
150 bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
151 FALSE),
152 HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
153 bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
154 FALSE),
67a4f2b7
AO		 155 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
156 complain_overflow_bitfield, bfd_elf_generic_reloc,
157 "R_X86_64_GOTPC32_TLSDESC",
158 FALSE, 0xffffffff, 0xffffffff, TRUE),
159 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
160 complain_overflow_dont, bfd_elf_generic_reloc,
161 "R_X86_64_TLSDESC_CALL",
162 FALSE, 0, 0, FALSE),
163 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
164 complain_overflow_bitfield, bfd_elf_generic_reloc,
165 "R_X86_64_TLSDESC",
166 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
cbe950e9
L		 167 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
169 MINUS_ONE, FALSE),
64d25c44
L		 170 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
172 MINUS_ONE, FALSE),
c3320543
L		 173 HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
174 bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
175 TRUE),
176 HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
177 bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
178 TRUE),
fe4770f4 179
a33d77bc
JB		 180 /* We have a gap in the reloc numbers here.
181 R_X86_64_standard counts the number up to this point, and
182 R_X86_64_vt_offset is the value to subtract from a reloc type of
183 R_X86_64_GNU_VT* to form an index into this table. */
c3320543 184#define R_X86_64_standard (R_X86_64_PLT32_BND + 1)
a33d77bc
JB		 185#define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
186
fe4770f4 187/* GNU extension to record C++ vtable hierarchy. */
b34976b6
AM		 188 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
189 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
fe4770f4
AJ		 190
191/* GNU extension to record C++ vtable member usage. */
b34976b6
AM		 192 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
193 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
d7921315
L		 194 FALSE),
195
196/* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
197 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
199 FALSE)
8d88c4ca
NC		 200};
201
d8045f23
NC		 202#define IS_X86_64_PCREL_TYPE(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
c3320543 206 || ((TYPE) == R_X86_64_PC32_BND) \
d8045f23
NC		 207 || ((TYPE) == R_X86_64_PC64))
208
8d88c4ca 209/* Map BFD relocs to the x86_64 elf relocs. */
70256ad8
AJ		 210struct elf_reloc_map
211{
8d88c4ca
NC		 212 bfd_reloc_code_real_type bfd_reloc_val;
213 unsigned char elf_reloc_val;
214};
215
dc810e39 216static const struct elf_reloc_map x86_64_reloc_map[] =
8d88c4ca 217{
70256ad8
AJ		 218 { BFD_RELOC_NONE, R_X86_64_NONE, },
219 { BFD_RELOC_64, R_X86_64_64, },
220 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
221 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
222 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
223 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
224 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
225 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
226 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
227 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
228 { BFD_RELOC_32, R_X86_64_32, },
229 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
230 { BFD_RELOC_16, R_X86_64_16, },
231 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
232 { BFD_RELOC_8, R_X86_64_8, },
233 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
bffbf940
JJ		 234 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
235 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
236 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
237 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
238 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
239 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
240 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
241 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
d6ab8113
JB		 242 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
243 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
244 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
7b81dfbb
AJ		 245 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
246 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
247 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
248 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
249 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
1788fc08
L		 250 { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
251 { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
67a4f2b7
AO		 252 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
253 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
254 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
cbe950e9 255 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
c3320543
L		 256 { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND,},
257 { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND,},
fe4770f4
AJ		 258 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
259 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
8d88c4ca
NC		 260};
261
67a4f2b7 262static reloc_howto_type *
351f65ca 263elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
67a4f2b7
AO		 264{
265 unsigned i;
266
d7921315
L		 267 if (r_type == (unsigned int) R_X86_64_32)
268 {
269 if (ABI_64_P (abfd))
270 i = r_type;
271 else
272 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
273 }
274 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
275 || r_type >= (unsigned int) R_X86_64_max)
67a4f2b7
AO		 276 {
277 if (r_type >= (unsigned int) R_X86_64_standard)
278 {
279 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
280 abfd, (int) r_type);
281 r_type = R_X86_64_NONE;
282 }
283 i = r_type;
284 }
285 else
286 i = r_type - (unsigned int) R_X86_64_vt_offset;
287 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
288 return &x86_64_elf_howto_table[i];
289}
8d88c4ca
NC		 290
291/* Given a BFD reloc type, return a HOWTO structure. */
292static reloc_howto_type *
351f65ca
L		 293elf_x86_64_reloc_type_lookup (bfd *abfd,
294 bfd_reloc_code_real_type code)
8d88c4ca
NC		 295{
296 unsigned int i;
27482721 297
8d88c4ca
NC		 298 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
299 i++)
300 {
301 if (x86_64_reloc_map[i].bfd_reloc_val == code)
351f65ca
L		 302 return elf_x86_64_rtype_to_howto (abfd,
303 x86_64_reloc_map[i].elf_reloc_val);
8d88c4ca 304 }
5860e3f8 305 return NULL;
8d88c4ca
NC		 306}
307
157090f7 308static reloc_howto_type *
d7921315 309elf_x86_64_reloc_name_lookup (bfd *abfd,
351f65ca 310 const char *r_name)
157090f7
AM		 311{
312 unsigned int i;
313
d7921315
L		 314 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
315 {
316 /* Get x32 R_X86_64_32. */
317 reloc_howto_type *reloc
318 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
319 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
320 return reloc;
321 }
322
323 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
157090f7
AM		 324 if (x86_64_elf_howto_table[i].name != NULL
325 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
326 return &x86_64_elf_howto_table[i];
327
328 return NULL;
329}
330
8d88c4ca 331/* Given an x86_64 ELF reloc type, fill in an arelent structure. */
8da6118f 332
8d88c4ca 333static void
351f65ca
L		 334elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
335 Elf_Internal_Rela *dst)
8d88c4ca 336{
67a4f2b7 337 unsigned r_type;
8d88c4ca 338
351f65ca
L		 339 r_type = ELF32_R_TYPE (dst->r_info);
340 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
8d88c4ca
NC		 341 BFD_ASSERT (r_type == cache_ptr->howto->type);
342}
70256ad8 343\f
3bab7989 344/* Support for core dump NOTE sections. */
b34976b6 345static bfd_boolean
351f65ca 346elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 347{
348 int offset;
eea6121a 349 size_t size;
3bab7989
ML		 350
351 switch (note->descsz)
352 {
353 default:
b34976b6 354 return FALSE;
3bab7989 355
bcd823f1
L		 356 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
357 /* pr_cursig */
228e534f 358 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
bcd823f1
L		 359
360 /* pr_pid */
228e534f 361 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
bcd823f1
L		 362
363 /* pr_reg */
364 offset = 72;
365 size = 216;
366
367 break;
368
3bab7989
ML		 369 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
370 /* pr_cursig */
228e534f 371 elf_tdata (abfd)->core->signal
3bab7989
ML		 372 = bfd_get_16 (abfd, note->descdata + 12);
373
374 /* pr_pid */
228e534f 375 elf_tdata (abfd)->core->lwpid
3bab7989
ML		 376 = bfd_get_32 (abfd, note->descdata + 32);
377
378 /* pr_reg */
379 offset = 112;
eea6121a 380 size = 216;
3bab7989
ML		 381
382 break;
383 }
384
385 /* Make a ".reg/999" section. */
386 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 387 size, note->descpos + offset);
3bab7989
ML		 388}
389
b34976b6 390static bfd_boolean
351f65ca 391elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 392{
393 switch (note->descsz)
394 {
395 default:
b34976b6 396 return FALSE;
3bab7989 397
bcd823f1 398 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
228e534f 399 elf_tdata (abfd)->core->pid
bcd823f1 400 = bfd_get_32 (abfd, note->descdata + 12);
228e534f 401 elf_tdata (abfd)->core->program
bcd823f1 402 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
228e534f 403 elf_tdata (abfd)->core->command
bcd823f1
L		 404 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
405 break;
406
3bab7989 407 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
228e534f 408 elf_tdata (abfd)->core->pid
261b8d08 409 = bfd_get_32 (abfd, note->descdata + 24);
228e534f 410 elf_tdata (abfd)->core->program
3bab7989 411 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
228e534f 412 elf_tdata (abfd)->core->command
3bab7989
ML		 413 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
414 }
415
416 /* Note that for some reason, a spurious space is tacked
417 onto the end of the args in some (at least one anyway)
418 implementations, so strip it off if it exists. */
419
420 {
228e534f 421 char *command = elf_tdata (abfd)->core->command;
3bab7989
ML		 422 int n = strlen (command);
423
424 if (0 < n && command[n - 1] == ' ')
425 command[n - 1] = '\0';
426 }
427
b34976b6 428 return TRUE;
3bab7989 429}
8fd79e71
L		 430
431#ifdef CORE_HEADER
432static char *
433elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
434 int note_type, ...)
435{
436 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8fd79e71
L		 437 va_list ap;
438 const char *fname, *psargs;
439 long pid;
440 int cursig;
441 const void *gregs;
442
443 switch (note_type)
444 {
445 default:
446 return NULL;
447
448 case NT_PRPSINFO:
449 va_start (ap, note_type);
450 fname = va_arg (ap, const char *);
451 psargs = va_arg (ap, const char *);
452 va_end (ap);
453
454 if (bed->s->elfclass == ELFCLASS32)
455 {
456 prpsinfo32_t data;
457 memset (&data, 0, sizeof (data));
458 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
459 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK		 460 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
461 &data, sizeof (data));
8fd79e71
L		 462 }
463 else
464 {
b1bd052d 465 prpsinfo64_t data;
8fd79e71
L		 466 memset (&data, 0, sizeof (data));
467 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
468 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK		 469 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
470 &data, sizeof (data));
8fd79e71 471 }
e85c6a70 472 /* NOTREACHED */
8fd79e71
L		 473
474 case NT_PRSTATUS:
475 va_start (ap, note_type);
476 pid = va_arg (ap, long);
477 cursig = va_arg (ap, int);
478 gregs = va_arg (ap, const void *);
479 va_end (ap);
480
481 if (bed->s->elfclass == ELFCLASS32)
482 {
483 if (bed->elf_machine_code == EM_X86_64)
484 {
485 prstatusx32_t prstat;
486 memset (&prstat, 0, sizeof (prstat));
487 prstat.pr_pid = pid;
488 prstat.pr_cursig = cursig;
489 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 490 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
491 &prstat, sizeof (prstat));
8fd79e71
L		 492 }
493 else
494 {
495 prstatus32_t prstat;
496 memset (&prstat, 0, sizeof (prstat));
497 prstat.pr_pid = pid;
498 prstat.pr_cursig = cursig;
499 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 500 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
501 &prstat, sizeof (prstat));
8fd79e71
L		 502 }
503 }
504 else
505 {
b1bd052d 506 prstatus64_t prstat;
8fd79e71
L		 507 memset (&prstat, 0, sizeof (prstat));
508 prstat.pr_pid = pid;
509 prstat.pr_cursig = cursig;
510 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 511 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
512 &prstat, sizeof (prstat));
8fd79e71 513 }
8fd79e71 514 }
e85c6a70 515 /* NOTREACHED */
8fd79e71
L		 516}
517#endif
3bab7989 518\f
407443a3 519/* Functions for the x86-64 ELF linker. */
70256ad8 520
407443a3 521/* The name of the dynamic interpreter. This is put in the .interp
70256ad8
AJ		 522 section. */
523
351f65ca 524#define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
eec9dd95 525#define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
70256ad8 526
d40d037c
AJ		 527/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
530 shared lib. */
531#define ELIMINATE_COPY_RELOCS 1
532
70256ad8
AJ		 533/* The size in bytes of an entry in the global offset table. */
534
535#define GOT_ENTRY_SIZE 8
8d88c4ca 536
70256ad8 537/* The size in bytes of an entry in the procedure linkage table. */
8d88c4ca 538
70256ad8
AJ		 539#define PLT_ENTRY_SIZE 16
540
541/* The first entry in a procedure linkage table looks like this. See the
542 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
543
351f65ca 544static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
70256ad8 545{
653165cc
AJ		 546 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
547 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
10efb593 548 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
70256ad8
AJ		 549};
550
551/* Subsequent entries in a procedure linkage table look like this. */
552
351f65ca 553static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
70256ad8 554{
653165cc 555 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
407443a3 556 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653165cc 557 0x68, /* pushq immediate */
70256ad8
AJ		 558 0, 0, 0, 0, /* replaced with index into relocation table. */
559 0xe9, /* jmp relative */
560 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
561};
562
0ff2b86e
L		 563/* The first entry in a procedure linkage table with BND relocations
564 like this. */
565
566static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] =
567{
568 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
569 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
570 0x0f, 0x1f, 0 /* nopl (%rax) */
571};
572
573/* Subsequent entries for legacy branches in a procedure linkage table
574 with BND relocations look like this. */
575
576static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] =
577{
578 0x68, 0, 0, 0, 0, /* pushq immediate */
579 0xe9, 0, 0, 0, 0, /* jmpq relative */
580 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
581};
582
583/* Subsequent entries for branches with BND prefx in a procedure linkage
584 table with BND relocations look like this. */
585
586static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] =
587{
588 0x68, 0, 0, 0, 0, /* pushq immediate */
589 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
590 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
591};
592
593/* Entries for legacy branches in the second procedure linkage table
594 look like this. */
595
596static const bfd_byte elf_x86_64_legacy_plt2_entry[8] =
597{
598 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
599 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
601};
602
603/* Entries for branches with BND prefix in the second procedure linkage
604 table look like this. */
605
606static const bfd_byte elf_x86_64_bnd_plt2_entry[8] =
607{
608 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
609 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
610 0x90 /* nop */
611};
612
e41b3a13
JJ		 613/* .eh_frame covering the .plt section. */
614
615static const bfd_byte elf_x86_64_eh_frame_plt[] =
616{
617#define PLT_CIE_LENGTH 20
618#define PLT_FDE_LENGTH 36
619#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
620#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
621 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
622 0, 0, 0, 0, /* CIE ID */
623 1, /* CIE version */
624 'z', 'R', 0, /* Augmentation string */
625 1, /* Code alignment factor */
626 0x78, /* Data alignment factor */
627 16, /* Return address column */
628 1, /* Augmentation size */
629 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
630 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
631 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
632 DW_CFA_nop, DW_CFA_nop,
633
634 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
635 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
636 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
637 0, 0, 0, 0, /* .plt size goes here */
638 0, /* Augmentation size */
639 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
640 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
641 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
642 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
643 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
644 11, /* Block length */
645 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
646 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
647 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
648 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
649 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
650};
651
eed180f8
RM		 652/* Architecture-specific backend data for x86-64. */
653
654struct elf_x86_64_backend_data
655{
656 /* Templates for the initial PLT entry and for subsequent entries. */
657 const bfd_byte *plt0_entry;
658 const bfd_byte *plt_entry;
659 unsigned int plt_entry_size; /* Size of each PLT entry. */
660
661 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
662 unsigned int plt0_got1_offset;
663 unsigned int plt0_got2_offset;
664
665 /* Offset of the end of the PC-relative instruction containing
666 plt0_got2_offset. */
667 unsigned int plt0_got2_insn_end;
668
669 /* Offsets into plt_entry that are to be replaced with... */
670 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
671 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
672 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
673
674 /* Length of the PC-relative instruction containing plt_got_offset. */
675 unsigned int plt_got_insn_size;
676
677 /* Offset of the end of the PC-relative jump to plt0_entry. */
678 unsigned int plt_plt_insn_end;
679
680 /* Offset into plt_entry where the initial value of the GOT entry points. */
681 unsigned int plt_lazy_offset;
682
683 /* .eh_frame covering the .plt section. */
684 const bfd_byte *eh_frame_plt;
685 unsigned int eh_frame_plt_size;
686};
687
f8222080
L		 688#define get_elf_x86_64_arch_data(bed) \
689 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
690
eed180f8 691#define get_elf_x86_64_backend_data(abfd) \
f8222080 692 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
eed180f8
RM		 693
694#define GET_PLT_ENTRY_SIZE(abfd) \
695 get_elf_x86_64_backend_data (abfd)->plt_entry_size
696
697/* These are the standard parameters. */
698static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
699 {
700 elf_x86_64_plt0_entry, /* plt0_entry */
701 elf_x86_64_plt_entry, /* plt_entry */
702 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
703 2, /* plt0_got1_offset */
704 8, /* plt0_got2_offset */
705 12, /* plt0_got2_insn_end */
706 2, /* plt_got_offset */
707 7, /* plt_reloc_offset */
708 12, /* plt_plt_offset */
709 6, /* plt_got_insn_size */
710 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
711 6, /* plt_lazy_offset */
712 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
713 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
714 };
715
0ff2b86e
L		 716static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed =
717 {
718 elf_x86_64_bnd_plt0_entry, /* plt0_entry */
719 elf_x86_64_bnd_plt_entry, /* plt_entry */
720 sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */
721 2, /* plt0_got1_offset */
722 1+8, /* plt0_got2_offset */
723 1+12, /* plt0_got2_insn_end */
724 1+2, /* plt_got_offset */
725 1, /* plt_reloc_offset */
726 7, /* plt_plt_offset */
727 1+6, /* plt_got_insn_size */
728 11, /* plt_plt_insn_end */
729 0, /* plt_lazy_offset */
730 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
731 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
732 };
733
eed180f8
RM		 734#define elf_backend_arch_data &elf_x86_64_arch_bed
735
70256ad8
AJ		 736/* x86-64 ELF linker hash entry. */
737
351f65ca 738struct elf_x86_64_link_hash_entry
70256ad8 739{
c434dee6 740 struct elf_link_hash_entry elf;
70256ad8 741
c434dee6 742 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 743 struct elf_dyn_relocs *dyn_relocs;
bffbf940
JJ		 744
745#define GOT_UNKNOWN 0
746#define GOT_NORMAL 1
747#define GOT_TLS_GD 2
748#define GOT_TLS_IE 3
67a4f2b7
AO		 749#define GOT_TLS_GDESC 4
750#define GOT_TLS_GD_BOTH_P(type) \
751 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
752#define GOT_TLS_GD_P(type) \
753 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
754#define GOT_TLS_GDESC_P(type) \
755 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
756#define GOT_TLS_GD_ANY_P(type) \
757 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
bffbf940 758 unsigned char tls_type;
67a4f2b7 759
bc696fd5
L		 760 /* TRUE if a weak symbol with a real definition needs a copy reloc.
761 When there is a weak symbol with a real definition, the processor
762 independent code will have arranged for us to see the real
763 definition first. We need to copy the needs_copy bit from the
764 real definition and check it when allowing copy reloc in PIE. */
765 unsigned int needs_copy : 1;
766
0ff2b86e 767 /* TRUE if symbol has at least one BND relocation. */
bc696fd5 768 unsigned int has_bnd_reloc : 1;
0ff2b86e 769
dd7e64d4
L		 770 /* Information about the GOT PLT entry. Filled when there are both
771 GOT and PLT relocations against the same function. */
772 union gotplt_union plt_got;
773
0ff2b86e
L		 774 /* Information about the second PLT entry. Filled when has_bnd_reloc is
775 set. */
776 union gotplt_union plt_bnd;
777
67a4f2b7
AO		 778 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
779 starting at the end of the jump table. */
780 bfd_vma tlsdesc_got;
bffbf940
JJ		 781};
782
351f65ca
L		 783#define elf_x86_64_hash_entry(ent) \
784 ((struct elf_x86_64_link_hash_entry *)(ent))
bffbf940 785
351f65ca 786struct elf_x86_64_obj_tdata
bffbf940
JJ		 787{
788 struct elf_obj_tdata root;
789
790 /* tls_type for each local got entry. */
791 char *local_got_tls_type;
67a4f2b7
AO		 792
793 /* GOTPLT entries for TLS descriptors. */
794 bfd_vma *local_tlsdesc_gotent;
70256ad8
AJ		 795};
796
351f65ca
L		 797#define elf_x86_64_tdata(abfd) \
798 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
bffbf940 799
351f65ca
L		 800#define elf_x86_64_local_got_tls_type(abfd) \
801 (elf_x86_64_tdata (abfd)->local_got_tls_type)
bffbf940 802
351f65ca
L		 803#define elf_x86_64_local_tlsdesc_gotent(abfd) \
804 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
bffbf940 805
0ffa91dd
NC		 806#define is_x86_64_elf(bfd) \
807 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
808 && elf_tdata (bfd) != NULL \
4dfe6ac6 809 && elf_object_id (bfd) == X86_64_ELF_DATA)
0ffa91dd
NC		 810
811static bfd_boolean
351f65ca 812elf_x86_64_mkobject (bfd *abfd)
0ffa91dd 813{
351f65ca 814 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
4dfe6ac6 815 X86_64_ELF_DATA);
0ffa91dd
NC		 816}
817
c434dee6 818/* x86-64 ELF linker hash table. */
8d88c4ca 819
351f65ca 820struct elf_x86_64_link_hash_table
407443a3 821{
c434dee6 822 struct elf_link_hash_table elf;
70256ad8 823
c434dee6 824 /* Short-cuts to get to dynamic linker sections. */
c434dee6
AJ		 825 asection *sdynbss;
826 asection *srelbss;
e41b3a13 827 asection *plt_eh_frame;
0ff2b86e 828 asection *plt_bnd;
dd7e64d4 829 asection *plt_got;
70256ad8 830
4dfe6ac6
NC		 831 union
832 {
bffbf940
JJ		 833 bfd_signed_vma refcount;
834 bfd_vma offset;
835 } tls_ld_got;
836
67a4f2b7
AO		 837 /* The amount of space used by the jump slots in the GOT. */
838 bfd_vma sgotplt_jump_table_size;
839
87d72d41
AM		 840 /* Small local sym cache. */
841 struct sym_cache sym_cache;
9f03412a 842
351f65ca
L		 843 bfd_vma (*r_info) (bfd_vma, bfd_vma);
844 bfd_vma (*r_sym) (bfd_vma);
248775ba 845 unsigned int pointer_r_type;
351f65ca
L		 846 const char *dynamic_interpreter;
847 int dynamic_interpreter_size;
848
9f03412a
AO		 849 /* _TLS_MODULE_BASE_ symbol. */
850 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L		 851
852 /* Used by local STT_GNU_IFUNC symbols. */
853 htab_t loc_hash_table;
4dfe6ac6
NC		 854 void * loc_hash_memory;
855
856 /* The offset into splt of the PLT entry for the TLS descriptor
857 resolver. Special values are 0, if not necessary (or not found
858 to be necessary yet), and -1 if needed but not determined
859 yet. */
860 bfd_vma tlsdesc_plt;
861 /* The offset into sgot of the GOT entry used by the PLT entry
862 above. */
863 bfd_vma tlsdesc_got;
e1f98742
L		 864
865 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
866 bfd_vma next_jump_slot_index;
867 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
868 bfd_vma next_irelative_index;
c434dee6 869};
70256ad8
AJ		 870
871/* Get the x86-64 ELF linker hash table from a link_info structure. */
8d88c4ca 872
351f65ca 873#define elf_x86_64_hash_table(p) \
4dfe6ac6 874 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
351f65ca 875 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
8d88c4ca 876
351f65ca 877#define elf_x86_64_compute_jump_table_size(htab) \
6de2ae4a 878 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
67a4f2b7 879
407443a3 880/* Create an entry in an x86-64 ELF linker hash table. */
70256ad8
AJ		 881
882static struct bfd_hash_entry *
351f65ca
L		 883elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
884 struct bfd_hash_table *table,
885 const char *string)
70256ad8 886{
70256ad8 887 /* Allocate the structure if it has not already been allocated by a
c434dee6
AJ		 888 subclass. */
889 if (entry == NULL)
890 {
a50b1753 891 entry = (struct bfd_hash_entry *)
eed180f8
RM		 892 bfd_hash_allocate (table,
893 sizeof (struct elf_x86_64_link_hash_entry));
c434dee6
AJ		 894 if (entry == NULL)
895 return entry;
896 }
70256ad8
AJ		 897
898 /* Call the allocation method of the superclass. */
c434dee6
AJ		 899 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
900 if (entry != NULL)
70256ad8 901 {
351f65ca 902 struct elf_x86_64_link_hash_entry *eh;
c434dee6 903
351f65ca 904 eh = (struct elf_x86_64_link_hash_entry *) entry;
c434dee6 905 eh->dyn_relocs = NULL;
bffbf940 906 eh->tls_type = GOT_UNKNOWN;
bc696fd5
L		 907 eh->needs_copy = 0;
908 eh->has_bnd_reloc = 0;
0ff2b86e 909 eh->plt_bnd.offset = (bfd_vma) -1;
dd7e64d4 910 eh->plt_got.offset = (bfd_vma) -1;
67a4f2b7 911 eh->tlsdesc_got = (bfd_vma) -1;
70256ad8
AJ		 912 }
913
c434dee6 914 return entry;
70256ad8
AJ		 915}
916
c25bc9fc
L		 917/* Compute a hash of a local hash entry. We use elf_link_hash_entry
918 for local symbol so that we can handle local STT_GNU_IFUNC symbols
919 as global symbol. We reuse indx and dynstr_index for local symbol
920 hash since they aren't used by global symbols in this backend. */
921
922static hashval_t
351f65ca 923elf_x86_64_local_htab_hash (const void *ptr)
c25bc9fc
L		 924{
925 struct elf_link_hash_entry *h
926 = (struct elf_link_hash_entry *) ptr;
d2149d72 927 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L		 928}
929
930/* Compare local hash entries. */
931
932static int
351f65ca 933elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
c25bc9fc
L		 934{
935 struct elf_link_hash_entry *h1
936 = (struct elf_link_hash_entry *) ptr1;
937 struct elf_link_hash_entry *h2
938 = (struct elf_link_hash_entry *) ptr2;
939
940 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
941}
942
943/* Find and/or create a hash entry for local symbol. */
944
945static struct elf_link_hash_entry *
351f65ca
L		 946elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
947 bfd *abfd, const Elf_Internal_Rela *rel,
948 bfd_boolean create)
c25bc9fc 949{
351f65ca 950 struct elf_x86_64_link_hash_entry e, *ret;
c25bc9fc 951 asection *sec = abfd->sections;
d2149d72 952 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
351f65ca 953 htab->r_sym (rel->r_info));
c25bc9fc
L		 954 void **slot;
955
956 e.elf.indx = sec->id;
351f65ca 957 e.elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc
L		 958 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
959 create ? INSERT : NO_INSERT);
960
961 if (!slot)
962 return NULL;
963
964 if (*slot)
965 {
351f65ca 966 ret = (struct elf_x86_64_link_hash_entry *) *slot;
c25bc9fc
L		 967 return &ret->elf;
968 }
969
351f65ca 970 ret = (struct elf_x86_64_link_hash_entry *)
c25bc9fc 971 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
351f65ca 972 sizeof (struct elf_x86_64_link_hash_entry));
c25bc9fc
L		 973 if (ret)
974 {
975 memset (ret, 0, sizeof (*ret));
976 ret->elf.indx = sec->id;
351f65ca 977 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc 978 ret->elf.dynindx = -1;
dd7e64d4 979 ret->plt_got.offset = (bfd_vma) -1;
c25bc9fc
L		 980 *slot = ret;
981 }
982 return &ret->elf;
983}
984
68faa637
AM		 985/* Destroy an X86-64 ELF linker hash table. */
986
987static void
d495ab0d 988elf_x86_64_link_hash_table_free (bfd *obfd)
68faa637
AM		 989{
990 struct elf_x86_64_link_hash_table *htab
d495ab0d 991 = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
68faa637
AM		 992
993 if (htab->loc_hash_table)
994 htab_delete (htab->loc_hash_table);
995 if (htab->loc_hash_memory)
996 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
d495ab0d 997 _bfd_elf_link_hash_table_free (obfd);
68faa637
AM		 998}
999
8d88c4ca
NC		 1000/* Create an X86-64 ELF linker hash table. */
1001
1002static struct bfd_link_hash_table *
351f65ca 1003elf_x86_64_link_hash_table_create (bfd *abfd)
8d88c4ca 1004{
351f65ca
L		 1005 struct elf_x86_64_link_hash_table *ret;
1006 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
8d88c4ca 1007
7bf52ea2 1008 ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
c434dee6 1009 if (ret == NULL)
8d88c4ca
NC		 1010 return NULL;
1011
eb4ff4d6 1012 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
351f65ca
L		 1013 elf_x86_64_link_hash_newfunc,
1014 sizeof (struct elf_x86_64_link_hash_entry),
4dfe6ac6 1015 X86_64_ELF_DATA))
8d88c4ca 1016 {
e2d34d7d 1017 free (ret);
8d88c4ca
NC		 1018 return NULL;
1019 }
1020
351f65ca
L		 1021 if (ABI_64_P (abfd))
1022 {
1023 ret->r_info = elf64_r_info;
1024 ret->r_sym = elf64_r_sym;
248775ba 1025 ret->pointer_r_type = R_X86_64_64;
351f65ca
L		 1026 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1027 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1028 }
1029 else
1030 {
1031 ret->r_info = elf32_r_info;
1032 ret->r_sym = elf32_r_sym;
248775ba 1033 ret->pointer_r_type = R_X86_64_32;
351f65ca
L		 1034 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1035 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1036 }
1037
c25bc9fc 1038 ret->loc_hash_table = htab_try_create (1024,
351f65ca
L		 1039 elf_x86_64_local_htab_hash,
1040 elf_x86_64_local_htab_eq,
c25bc9fc
L		 1041 NULL);
1042 ret->loc_hash_memory = objalloc_create ();
1043 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1044 {
d495ab0d 1045 elf_x86_64_link_hash_table_free (abfd);
c25bc9fc
L		 1046 return NULL;
1047 }
d495ab0d 1048 ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
c25bc9fc 1049
c434dee6
AJ		 1050 return &ret->elf.root;
1051}
1052
c434dee6
AJ		 1053/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1054 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1055 hash table. */
1056
b34976b6 1057static bfd_boolean
351f65ca
L		 1058elf_x86_64_create_dynamic_sections (bfd *dynobj,
1059 struct bfd_link_info *info)
c434dee6 1060{
351f65ca 1061 struct elf_x86_64_link_hash_table *htab;
c434dee6 1062
c434dee6 1063 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 1064 return FALSE;
c434dee6 1065
351f65ca 1066 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1067 if (htab == NULL)
1068 return FALSE;
1069
3d4d4302 1070 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
9a926d55 1071 if (!htab->sdynbss)
c434dee6
AJ		 1072 abort ();
1073
9a926d55
L		 1074 if (info->executable)
1075 {
1076 /* Always allow copy relocs for building executables. */
9d157cb9 1077 asection *s = bfd_get_linker_section (dynobj, ".rela.bss");
9a926d55
L		 1078 if (s == NULL)
1079 {
1080 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1081 s = bfd_make_section_anyway_with_flags (dynobj,
1082 ".rela.bss",
1083 (bed->dynamic_sec_flags
1084 | SEC_READONLY));
1085 if (s == NULL
1086 || ! bfd_set_section_alignment (dynobj, s,
1087 bed->s->log_file_align))
1088 return FALSE;
1089 }
1090 htab->srelbss = s;
1091 }
1092
e41b3a13 1093 if (!info->no_ld_generated_unwind_info
2fe0fd06 1094 && htab->plt_eh_frame == NULL
e4de50d4 1095 && htab->elf.splt != NULL)
e41b3a13 1096 {
bbf96e4e
L		 1097 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1098 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1099 | SEC_LINKER_CREATED);
e41b3a13 1100 htab->plt_eh_frame
bbf96e4e 1101 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ		 1102 if (htab->plt_eh_frame == NULL
1103 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
1104 return FALSE;
e41b3a13 1105 }
b34976b6 1106 return TRUE;
c434dee6
AJ		 1107}
1108
1109/* Copy the extra info we tack onto an elf_link_hash_entry. */
1110
1111static void
351f65ca
L		 1112elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1113 struct elf_link_hash_entry *dir,
1114 struct elf_link_hash_entry *ind)
c434dee6 1115{
351f65ca 1116 struct elf_x86_64_link_hash_entry *edir, *eind;
c434dee6 1117
351f65ca
L		 1118 edir = (struct elf_x86_64_link_hash_entry *) dir;
1119 eind = (struct elf_x86_64_link_hash_entry *) ind;
c434dee6 1120
0ff2b86e
L		 1121 if (!edir->has_bnd_reloc)
1122 edir->has_bnd_reloc = eind->has_bnd_reloc;
1123
c434dee6
AJ		 1124 if (eind->dyn_relocs != NULL)
1125 {
1126 if (edir->dyn_relocs != NULL)
1127 {
e03a8ed8
L		 1128 struct elf_dyn_relocs **pp;
1129 struct elf_dyn_relocs *p;
c434dee6 1130
fcfa13d2 1131 /* Add reloc counts against the indirect sym to the direct sym
c434dee6
AJ		 1132 list. Merge any entries against the same section. */
1133 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1134 {
e03a8ed8 1135 struct elf_dyn_relocs *q;
c434dee6
AJ		 1136
1137 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1138 if (q->sec == p->sec)
1139 {
1140 q->pc_count += p->pc_count;
1141 q->count += p->count;
1142 *pp = p->next;
1143 break;
1144 }
1145 if (q == NULL)
1146 pp = &p->next;
1147 }
1148 *pp = edir->dyn_relocs;
1149 }
1150
1151 edir->dyn_relocs = eind->dyn_relocs;
1152 eind->dyn_relocs = NULL;
1153 }
1154
bffbf940
JJ		 1155 if (ind->root.type == bfd_link_hash_indirect
1156 && dir->got.refcount <= 0)
1157 {
1158 edir->tls_type = eind->tls_type;
1159 eind->tls_type = GOT_UNKNOWN;
1160 }
1161
d40d037c
AJ		 1162 if (ELIMINATE_COPY_RELOCS
1163 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 1164 && dir->dynamic_adjusted)
1165 {
1166 /* If called to transfer flags for a weakdef during processing
1167 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1168 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1169 dir->ref_dynamic |= ind->ref_dynamic;
1170 dir->ref_regular |= ind->ref_regular;
1171 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1172 dir->needs_plt |= ind->needs_plt;
1173 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1174 }
d40d037c 1175 else
fcfa13d2 1176 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
8d88c4ca
NC		 1177}
1178
b34976b6 1179static bfd_boolean
27482721 1180elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940 1181{
8d88c4ca
NC		 1182 /* Set the right machine number for an x86-64 elf64 file. */
1183 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 1184 return TRUE;
8d88c4ca
NC		 1185}
1186
8059fb19
RM		 1187static bfd_boolean
1188elf32_x86_64_elf_object_p (bfd *abfd)
1189{
1190 /* Set the right machine number for an x86-64 elf32 file. */
1191 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1192 return TRUE;
1193}
1194
142411ca
L		 1195/* Return TRUE if the TLS access code sequence support transition
1196 from R_TYPE. */
1197
1198static bfd_boolean
351f65ca
L		 1199elf_x86_64_check_tls_transition (bfd *abfd,
1200 struct bfd_link_info *info,
1201 asection *sec,
1202 bfd_byte *contents,
1203 Elf_Internal_Shdr *symtab_hdr,
1204 struct elf_link_hash_entry **sym_hashes,
1205 unsigned int r_type,
1206 const Elf_Internal_Rela *rel,
1207 const Elf_Internal_Rela *relend)
bffbf940 1208{
142411ca
L		 1209 unsigned int val;
1210 unsigned long r_symndx;
5c98a14e 1211 bfd_boolean largepic = FALSE;
142411ca
L		 1212 struct elf_link_hash_entry *h;
1213 bfd_vma offset;
351f65ca 1214 struct elf_x86_64_link_hash_table *htab;
142411ca
L		 1215
1216 /* Get the section contents. */
1217 if (contents == NULL)
1218 {
1219 if (elf_section_data (sec)->this_hdr.contents != NULL)
1220 contents = elf_section_data (sec)->this_hdr.contents;
1221 else
1222 {
1223 /* FIXME: How to better handle error condition? */
1224 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1225 return FALSE;
bffbf940 1226
142411ca
L		 1227 /* Cache the section contents for elf_link_input_bfd. */
1228 elf_section_data (sec)->this_hdr.contents = contents;
1229 }
1230 }
1231
351f65ca 1232 htab = elf_x86_64_hash_table (info);
142411ca 1233 offset = rel->r_offset;
bffbf940 1234 switch (r_type)
142411ca
L		 1235 {
1236 case R_X86_64_TLSGD:
1237 case R_X86_64_TLSLD:
1238 if ((rel + 1) >= relend)
1239 return FALSE;
1240
1241 if (r_type == R_X86_64_TLSGD)
1242 {
52bc799a 1243 /* Check transition from GD access model. For 64bit, only
142411ca
L		 1244 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1245 .word 0x6666; rex64; call __tls_get_addr
52bc799a
L		 1246 can transit to different access model. For 32bit, only
1247 leaq foo@tlsgd(%rip), %rdi
1248 .word 0x6666; rex64; call __tls_get_addr
5c98a14e
JJ		 1249 can transit to different access model. For largepic
1250 we also support:
1251 leaq foo@tlsgd(%rip), %rdi
1252 movabsq $__tls_get_addr@pltoff, %rax
1253 addq $rbx, %rax
1254 call *%rax. */
142411ca 1255
fa289a5f
AM		 1256 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1257 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1258
5c98a14e 1259 if ((offset + 12) > sec->size)
142411ca 1260 return FALSE;
52bc799a 1261
5c98a14e
JJ		 1262 if (memcmp (contents + offset + 4, call, 4) != 0)
1263 {
1264 if (!ABI_64_P (abfd)
1265 || (offset + 19) > sec->size
1266 || offset < 3
1267 || memcmp (contents + offset - 3, leaq + 1, 3) != 0
1268 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1269 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1270 != 0)
1271 return FALSE;
1272 largepic = TRUE;
1273 }
1274 else if (ABI_64_P (abfd))
52bc799a 1275 {
52bc799a 1276 if (offset < 4
fa289a5f 1277 || memcmp (contents + offset - 4, leaq, 4) != 0)
52bc799a
L		 1278 return FALSE;
1279 }
1280 else
1281 {
52bc799a 1282 if (offset < 3
fa289a5f 1283 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
52bc799a
L		 1284 return FALSE;
1285 }
142411ca
L		 1286 }
1287 else
1288 {
1289 /* Check transition from LD access model. Only
1290 leaq foo@tlsld(%rip), %rdi;
1291 call __tls_get_addr
5c98a14e
JJ		 1292 can transit to different access model. For largepic
1293 we also support:
1294 leaq foo@tlsld(%rip), %rdi
1295 movabsq $__tls_get_addr@pltoff, %rax
1296 addq $rbx, %rax
1297 call *%rax. */
142411ca 1298
fa289a5f 1299 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
142411ca
L		 1300
1301 if (offset < 3 || (offset + 9) > sec->size)
1302 return FALSE;
1303
5c98a14e 1304 if (memcmp (contents + offset - 3, lea, 3) != 0)
142411ca 1305 return FALSE;
5c98a14e
JJ		 1306
1307 if (0xe8 != *(contents + offset + 4))
1308 {
1309 if (!ABI_64_P (abfd)
1310 || (offset + 19) > sec->size
1311 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1312 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1313 != 0)
1314 return FALSE;
1315 largepic = TRUE;
1316 }
142411ca
L		 1317 }
1318
351f65ca 1319 r_symndx = htab->r_sym (rel[1].r_info);
142411ca
L		 1320 if (r_symndx < symtab_hdr->sh_info)
1321 return FALSE;
1322
1323 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b 1324 /* Use strncmp to check __tls_get_addr since __tls_get_addr
eed180f8 1325 may be versioned. */
142411ca
L		 1326 return (h != NULL
1327 && h->root.root.string != NULL
5c98a14e
JJ		 1328 && (largepic
1329 ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64
1330 : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1331 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32))
c4fb387b
L		 1332 && (strncmp (h->root.root.string,
1333 "__tls_get_addr", 14) == 0));
142411ca
L		 1334
1335 case R_X86_64_GOTTPOFF:
1336 /* Check transition from IE access model:
4a4c5f25
L		 1337 mov foo@gottpoff(%rip), %reg
1338 add foo@gottpoff(%rip), %reg
142411ca
L		 1339 */
1340
4a4c5f25
L		 1341 /* Check REX prefix first. */
1342 if (offset >= 3 && (offset + 4) <= sec->size)
1343 {
1344 val = bfd_get_8 (abfd, contents + offset - 3);
1345 if (val != 0x48 && val != 0x4c)
1346 {
1347 /* X32 may have 0x44 REX prefix or no REX prefix. */
1348 if (ABI_64_P (abfd))
1349 return FALSE;
1350 }
1351 }
1352 else
1353 {
1354 /* X32 may not have any REX prefix. */
1355 if (ABI_64_P (abfd))
1356 return FALSE;
1357 if (offset < 2 || (offset + 3) > sec->size)
1358 return FALSE;
1359 }
142411ca
L		 1360
1361 val = bfd_get_8 (abfd, contents + offset - 2);
1362 if (val != 0x8b && val != 0x03)
1363 return FALSE;
1364
1365 val = bfd_get_8 (abfd, contents + offset - 1);
1366 return (val & 0xc7) == 5;
1367
1368 case R_X86_64_GOTPC32_TLSDESC:
1369 /* Check transition from GDesc access model:
1370 leaq x@tlsdesc(%rip), %rax
1371
1372 Make sure it's a leaq adding rip to a 32-bit offset
1373 into any register, although it's probably almost always
1374 going to be rax. */
1375
1376 if (offset < 3 || (offset + 4) > sec->size)
1377 return FALSE;
1378
1379 val = bfd_get_8 (abfd, contents + offset - 3);
1380 if ((val & 0xfb) != 0x48)
1381 return FALSE;
1382
1383 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1384 return FALSE;
1385
1386 val = bfd_get_8 (abfd, contents + offset - 1);
1387 return (val & 0xc7) == 0x05;
1388
1389 case R_X86_64_TLSDESC_CALL:
1390 /* Check transition from GDesc access model:
1391 call *x@tlsdesc(%rax)
1392 */
1393 if (offset + 2 <= sec->size)
1394 {
1395 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM		 1396 static const unsigned char call[] = { 0xff, 0x10 };
1397 return memcmp (contents + offset, call, 2) == 0;
142411ca
L		 1398 }
1399
1400 return FALSE;
1401
1402 default:
1403 abort ();
1404 }
1405}
1406
1407/* Return TRUE if the TLS access transition is OK or no transition
1408 will be performed. Update R_TYPE if there is a transition. */
1409
1410static bfd_boolean
351f65ca
L		 1411elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1412 asection *sec, bfd_byte *contents,
1413 Elf_Internal_Shdr *symtab_hdr,
1414 struct elf_link_hash_entry **sym_hashes,
1415 unsigned int *r_type, int tls_type,
1416 const Elf_Internal_Rela *rel,
1417 const Elf_Internal_Rela *relend,
1418 struct elf_link_hash_entry *h,
1419 unsigned long r_symndx)
142411ca
L		 1420{
1421 unsigned int from_type = *r_type;
1422 unsigned int to_type = from_type;
1423 bfd_boolean check = TRUE;
1424
bb1cb422
L		 1425 /* Skip TLS transition for functions. */
1426 if (h != NULL
1427 && (h->type == STT_FUNC
1428 || h->type == STT_GNU_IFUNC))
1429 return TRUE;
1430
142411ca 1431 switch (from_type)
bffbf940
JJ		 1432 {
1433 case R_X86_64_TLSGD:
67a4f2b7
AO		 1434 case R_X86_64_GOTPC32_TLSDESC:
1435 case R_X86_64_TLSDESC_CALL:
bffbf940 1436 case R_X86_64_GOTTPOFF:
1d85728f 1437 if (info->executable)
142411ca
L		 1438 {
1439 if (h == NULL)
1440 to_type = R_X86_64_TPOFF32;
1441 else
1442 to_type = R_X86_64_GOTTPOFF;
1443 }
1444
351f65ca 1445 /* When we are called from elf_x86_64_relocate_section,
142411ca
L		 1446 CONTENTS isn't NULL and there may be additional transitions
1447 based on TLS_TYPE. */
1448 if (contents != NULL)
1449 {
1450 unsigned int new_to_type = to_type;
1451
1d85728f 1452 if (info->executable
142411ca
L		 1453 && h != NULL
1454 && h->dynindx == -1
1455 && tls_type == GOT_TLS_IE)
1456 new_to_type = R_X86_64_TPOFF32;
1457
1458 if (to_type == R_X86_64_TLSGD
1459 || to_type == R_X86_64_GOTPC32_TLSDESC
1460 || to_type == R_X86_64_TLSDESC_CALL)
1461 {
1462 if (tls_type == GOT_TLS_IE)
1463 new_to_type = R_X86_64_GOTTPOFF;
1464 }
1465
1466 /* We checked the transition before when we were called from
351f65ca 1467 elf_x86_64_check_relocs. We only want to check the new
142411ca
L		 1468 transition which hasn't been checked before. */
1469 check = new_to_type != to_type && from_type == to_type;
1470 to_type = new_to_type;
1471 }
1472
1473 break;
1474
bffbf940 1475 case R_X86_64_TLSLD:
1d85728f 1476 if (info->executable)
142411ca
L		 1477 to_type = R_X86_64_TPOFF32;
1478 break;
1479
1480 default:
1481 return TRUE;
bffbf940
JJ		 1482 }
1483
142411ca
L		 1484 /* Return TRUE if there is no transition. */
1485 if (from_type == to_type)
1486 return TRUE;
1487
1488 /* Check if the transition can be performed. */
1489 if (check
351f65ca
L		 1490 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1491 symtab_hdr, sym_hashes,
1492 from_type, rel, relend))
142411ca 1493 {
2f629d23 1494 reloc_howto_type *from, *to;
4c544807 1495 const char *name;
142411ca 1496
351f65ca
L		 1497 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1498 to = elf_x86_64_rtype_to_howto (abfd, to_type);
142411ca 1499
4c544807
L		 1500 if (h)
1501 name = h->root.root.string;
1502 else
1503 {
351f65ca 1504 struct elf_x86_64_link_hash_table *htab;
4dfe6ac6 1505
351f65ca 1506 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1507 if (htab == NULL)
1508 name = "*unknown*";
1509 else
1510 {
1511 Elf_Internal_Sym *isym;
1512
1513 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1514 abfd, r_symndx);
1515 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1516 }
4c544807
L		 1517 }
1518
142411ca
L		 1519 (*_bfd_error_handler)
1520 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1521 "in section `%A' failed"),
4c544807 1522 abfd, sec, from->name, to->name, name,
142411ca
L		 1523 (unsigned long) rel->r_offset);
1524 bfd_set_error (bfd_error_bad_value);
1525 return FALSE;
1526 }
1527
1528 *r_type = to_type;
1529 return TRUE;
bffbf940
JJ		 1530}
1531
c1d11331
L		 1532/* Rename some of the generic section flags to better document how they
1533 are used here. */
1534#define need_convert_mov_to_lea sec_flg0
1535
70256ad8 1536/* Look through the relocs for a section during the first phase, and
c434dee6
AJ		 1537 calculate needed space in the global offset table, procedure
1538 linkage table, and dynamic reloc sections. */
70256ad8 1539
b34976b6 1540static bfd_boolean
351f65ca
L		 1541elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1542 asection *sec,
1543 const Elf_Internal_Rela *relocs)
70256ad8 1544{
351f65ca 1545 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 1546 Elf_Internal_Shdr *symtab_hdr;
1547 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ		 1548 const Elf_Internal_Rela *rel;
1549 const Elf_Internal_Rela *rel_end;
70256ad8 1550 asection *sreloc;
dd7e64d4 1551 bfd_boolean use_plt_got;
70256ad8 1552
1049f94e 1553 if (info->relocatable)
b34976b6 1554 return TRUE;
70256ad8 1555
0ffa91dd
NC		 1556 BFD_ASSERT (is_x86_64_elf (abfd));
1557
351f65ca 1558 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1559 if (htab == NULL)
1560 return FALSE;
1561
dd7e64d4
L		 1562 use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed;
1563
0ffa91dd 1564 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8 1565 sym_hashes = elf_sym_hashes (abfd);
70256ad8 1566
c434dee6 1567 sreloc = NULL;
cbe950e9 1568
70256ad8
AJ		 1569 rel_end = relocs + sec->reloc_count;
1570 for (rel = relocs; rel < rel_end; rel++)
1571 {
bffbf940 1572 unsigned int r_type;
70256ad8
AJ		 1573 unsigned long r_symndx;
1574 struct elf_link_hash_entry *h;
4c544807
L		 1575 Elf_Internal_Sym *isym;
1576 const char *name;
06a6a421 1577 bfd_boolean size_reloc;
70256ad8 1578
351f65ca
L		 1579 r_symndx = htab->r_sym (rel->r_info);
1580 r_type = ELF32_R_TYPE (rel->r_info);
c434dee6
AJ		 1581
1582 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1583 {
d003868e
AM		 1584 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1585 abfd, r_symndx);
b34976b6 1586 return FALSE;
c434dee6
AJ		 1587 }
1588
70256ad8 1589 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1590 {
1591 /* A local symbol. */
c2e61a4e
L		 1592 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1593 abfd, r_symndx);
1594 if (isym == NULL)
1595 return FALSE;
c25bc9fc
L		 1596
1597 /* Check relocation against local STT_GNU_IFUNC symbol. */
351f65ca 1598 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
c25bc9fc 1599 {
351f65ca
L		 1600 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1601 TRUE);
c25bc9fc 1602 if (h == NULL)
c2e61a4e 1603 return FALSE;
6bbec505 1604
c25bc9fc
L		 1605 /* Fake a STT_GNU_IFUNC symbol. */
1606 h->type = STT_GNU_IFUNC;
1607 h->def_regular = 1;
1608 h->ref_regular = 1;
1609 h->forced_local = 1;
1610 h->root.type = bfd_link_hash_defined;
1611 }
1612 else
1613 h = NULL;
1614 }
70256ad8 1615 else
71cb9464 1616 {
4c544807 1617 isym = NULL;
71cb9464
L		 1618 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1619 while (h->root.type == bfd_link_hash_indirect
1620 || h->root.type == bfd_link_hash_warning)
1621 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1622 }
cbe950e9 1623
d1534d16
L		 1624 /* Check invalid x32 relocations. */
1625 if (!ABI_64_P (abfd))
1626 switch (r_type)
1627 {
1628 default:
1629 break;
1630
d1534d16
L		 1631 case R_X86_64_DTPOFF64:
1632 case R_X86_64_TPOFF64:
1633 case R_X86_64_PC64:
1634 case R_X86_64_GOTOFF64:
1635 case R_X86_64_GOT64:
1636 case R_X86_64_GOTPCREL64:
1637 case R_X86_64_GOTPC64:
1638 case R_X86_64_GOTPLT64:
1639 case R_X86_64_PLTOFF64:
1640 {
1641 if (h)
1642 name = h->root.root.string;
1643 else
1644 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1645 NULL);
1646 (*_bfd_error_handler)
1647 (_("%B: relocation %s against symbol `%s' isn't "
1648 "supported in x32 mode"), abfd,
1649 x86_64_elf_howto_table[r_type].name, name);
1650 bfd_set_error (bfd_error_bad_value);
1651 return FALSE;
1652 }
1653 break;
1654 }
1655
c25bc9fc
L		 1656 if (h != NULL)
1657 {
cbe950e9
L		 1658 /* Create the ifunc sections for static executables. If we
1659 never see an indirect function symbol nor we are building
1660 a static executable, those sections will be empty and
1661 won't appear in output. */
1662 switch (r_type)
1663 {
1664 default:
1665 break;
1666
0ff2b86e
L		 1667 case R_X86_64_PC32_BND:
1668 case R_X86_64_PLT32_BND:
d258b828
IZ		 1669 case R_X86_64_PC32:
1670 case R_X86_64_PLT32:
1671 case R_X86_64_32:
1672 case R_X86_64_64:
0ff2b86e
L		 1673 /* MPX PLT is supported only if elf_x86_64_arch_bed
1674 is used in 64-bit mode. */
1675 if (ABI_64_P (abfd)
d258b828
IZ		 1676 && info->bndplt
1677 && (get_elf_x86_64_backend_data (abfd)
1678 == &elf_x86_64_arch_bed))
0ff2b86e 1679 {
bc696fd5 1680 elf_x86_64_hash_entry (h)->has_bnd_reloc = 1;
0ff2b86e
L		 1681
1682 /* Create the second PLT for Intel MPX support. */
1683 if (htab->plt_bnd == NULL)
1684 {
1685 unsigned int plt_bnd_align;
1686 const struct elf_backend_data *bed;
1687
1688 bed = get_elf_backend_data (info->output_bfd);
6db50b4c
L		 1689 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8
1690 && (sizeof (elf_x86_64_bnd_plt2_entry)
1691 == sizeof (elf_x86_64_legacy_plt2_entry)));
1692 plt_bnd_align = 3;
0ff2b86e
L		 1693
1694 if (htab->elf.dynobj == NULL)
1695 htab->elf.dynobj = abfd;
1696 htab->plt_bnd
1697 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1698 ".plt.bnd",
1699 (bed->dynamic_sec_flags
1700 | SEC_ALLOC
1701 | SEC_CODE
1702 | SEC_LOAD
1703 | SEC_READONLY));
1704 if (htab->plt_bnd == NULL
1705 || !bfd_set_section_alignment (htab->elf.dynobj,
1706 htab->plt_bnd,
1707 plt_bnd_align))
1708 return FALSE;
1709 }
1710 }
1711
cbe950e9 1712 case R_X86_64_32S:
cbe950e9 1713 case R_X86_64_PC64:
cbe950e9
L		 1714 case R_X86_64_GOTPCREL:
1715 case R_X86_64_GOTPCREL64:
9d4057ee
AM		 1716 if (htab->elf.dynobj == NULL)
1717 htab->elf.dynobj = abfd;
1718 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
c2e61a4e 1719 return FALSE;
cbe950e9
L		 1720 break;
1721 }
1722
ad1e85de
L		 1723 /* It is referenced by a non-shared object. */
1724 h->ref_regular = 1;
61315175 1725 h->root.non_ir_ref = 1;
13a2df29
L		 1726
1727 if (h->type == STT_GNU_IFUNC)
1728 elf_tdata (info->output_bfd)->has_gnu_symbols
1729 |= elf_gnu_symbol_ifunc;
71cb9464 1730 }
70256ad8 1731
351f65ca
L		 1732 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1733 symtab_hdr, sym_hashes,
1734 &r_type, GOT_UNKNOWN,
1735 rel, rel_end, h, r_symndx))
c2e61a4e 1736 return FALSE;
142411ca 1737
bffbf940 1738 switch (r_type)
70256ad8 1739 {
bffbf940
JJ		 1740 case R_X86_64_TLSLD:
1741 htab->tls_ld_got.refcount += 1;
1742 goto create_got;
1743
1744 case R_X86_64_TPOFF32:
351f65ca 1745 if (!info->executable && ABI_64_P (abfd))
70256ad8 1746 {
09a24cbf 1747 if (h)
4c544807
L		 1748 name = h->root.root.string;
1749 else
1750 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1751 NULL);
bffbf940 1752 (*_bfd_error_handler)
d003868e
AM		 1753 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1754 abfd,
4c544807 1755 x86_64_elf_howto_table[r_type].name, name);
bffbf940 1756 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1757 return FALSE;
70256ad8 1758 }
bffbf940 1759 break;
c434dee6 1760
bffbf940 1761 case R_X86_64_GOTTPOFF:
1d85728f 1762 if (!info->executable)
bffbf940
JJ		 1763 info->flags |= DF_STATIC_TLS;
1764 /* Fall through */
70256ad8 1765
bffbf940
JJ		 1766 case R_X86_64_GOT32:
1767 case R_X86_64_GOTPCREL:
1768 case R_X86_64_TLSGD:
7b81dfbb
AJ		 1769 case R_X86_64_GOT64:
1770 case R_X86_64_GOTPCREL64:
1771 case R_X86_64_GOTPLT64:
67a4f2b7
AO		 1772 case R_X86_64_GOTPC32_TLSDESC:
1773 case R_X86_64_TLSDESC_CALL:
bffbf940
JJ		 1774 /* This symbol requires a global offset table entry. */
1775 {
1776 int tls_type, old_tls_type;
1777
1778 switch (r_type)
1779 {
1780 default: tls_type = GOT_NORMAL; break;
1781 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1782 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
67a4f2b7
AO		 1783 case R_X86_64_GOTPC32_TLSDESC:
1784 case R_X86_64_TLSDESC_CALL:
1785 tls_type = GOT_TLS_GDESC; break;
bffbf940
JJ		 1786 }
1787
1788 if (h != NULL)
1789 {
1790 h->got.refcount += 1;
351f65ca 1791 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
bffbf940
JJ		 1792 }
1793 else
1794 {
1795 bfd_signed_vma *local_got_refcounts;
1796
1797 /* This is a global offset table entry for a local symbol. */
1798 local_got_refcounts = elf_local_got_refcounts (abfd);
1799 if (local_got_refcounts == NULL)
1800 {
1801 bfd_size_type size;
1802
1803 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1804 size *= sizeof (bfd_signed_vma)
1805 + sizeof (bfd_vma) + sizeof (char);
bffbf940
JJ		 1806 local_got_refcounts = ((bfd_signed_vma *)
1807 bfd_zalloc (abfd, size));
1808 if (local_got_refcounts == NULL)
c2e61a4e 1809 return FALSE;
bffbf940 1810 elf_local_got_refcounts (abfd) = local_got_refcounts;
351f65ca 1811 elf_x86_64_local_tlsdesc_gotent (abfd)
67a4f2b7 1812 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
351f65ca 1813 elf_x86_64_local_got_tls_type (abfd)
67a4f2b7 1814 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
bffbf940
JJ		 1815 }
1816 local_got_refcounts[r_symndx] += 1;
1817 old_tls_type
351f65ca 1818 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
bffbf940
JJ		 1819 }
1820
1821 /* If a TLS symbol is accessed using IE at least once,
1822 there is no point to use dynamic model for it. */
1823 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7
AO		 1824 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1825 || tls_type != GOT_TLS_IE))
bffbf940 1826 {
67a4f2b7 1827 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
bffbf940 1828 tls_type = old_tls_type;
67a4f2b7
AO		 1829 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1830 && GOT_TLS_GD_ANY_P (tls_type))
1831 tls_type |= old_tls_type;
bffbf940
JJ		 1832 else
1833 {
09a24cbf 1834 if (h)
4c544807
L		 1835 name = h->root.root.string;
1836 else
1837 name = bfd_elf_sym_name (abfd, symtab_hdr,
1838 isym, NULL);
bffbf940 1839 (*_bfd_error_handler)
1f7a4e42 1840 (_("%B: '%s' accessed both as normal and thread local symbol"),
4c544807 1841 abfd, name);
68c4a57e 1842 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1843 return FALSE;
bffbf940
JJ		 1844 }
1845 }
1846
1847 if (old_tls_type != tls_type)
1848 {
1849 if (h != NULL)
351f65ca 1850 elf_x86_64_hash_entry (h)->tls_type = tls_type;
bffbf940 1851 else
351f65ca 1852 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
bffbf940
JJ		 1853 }
1854 }
c434dee6
AJ		 1855 /* Fall through */
1856
d6ab8113
JB		 1857 case R_X86_64_GOTOFF64:
1858 case R_X86_64_GOTPC32:
7b81dfbb 1859 case R_X86_64_GOTPC64:
bffbf940 1860 create_got:
6de2ae4a 1861 if (htab->elf.sgot == NULL)
c434dee6
AJ		 1862 {
1863 if (htab->elf.dynobj == NULL)
1864 htab->elf.dynobj = abfd;
6de2ae4a
L		 1865 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1866 info))
c2e61a4e 1867 return FALSE;
c434dee6 1868 }
70256ad8
AJ		 1869 break;
1870
1871 case R_X86_64_PLT32:
c3320543 1872 case R_X86_64_PLT32_BND:
70256ad8 1873 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ		 1874 actually build the entry in adjust_dynamic_symbol,
1875 because this might be a case of linking PIC code which is
1876 never referenced by a dynamic object, in which case we
1877 don't need to generate a procedure linkage table entry
1878 after all. */
70256ad8
AJ		 1879
1880 /* If this is a local symbol, we resolve it directly without
407443a3 1881 creating a procedure linkage table entry. */
70256ad8
AJ		 1882 if (h == NULL)
1883 continue;
1884
f5385ebf 1885 h->needs_plt = 1;
51b64d56 1886 h->plt.refcount += 1;
70256ad8
AJ		 1887 break;
1888
7b81dfbb
AJ		 1889 case R_X86_64_PLTOFF64:
1890 /* This tries to form the 'address' of a function relative
1891 to GOT. For global symbols we need a PLT entry. */
1892 if (h != NULL)
1893 {
1894 h->needs_plt = 1;
1895 h->plt.refcount += 1;
1896 }
1897 goto create_got;
1898
6a3e1bae
L		 1899 case R_X86_64_SIZE32:
1900 case R_X86_64_SIZE64:
06a6a421 1901 size_reloc = TRUE;
6a3e1bae
L		 1902 goto do_size;
1903
248775ba
L		 1904 case R_X86_64_32:
1905 if (!ABI_64_P (abfd))
1906 goto pointer;
cc78d0af
AJ		 1907 case R_X86_64_8:
1908 case R_X86_64_16:
70256ad8 1909 case R_X86_64_32S:
1b71fb54
AJ		 1910 /* Let's help debug shared library creation. These relocs
1911 cannot be used in shared libs. Don't error out for
1912 sections we don't care about, such as debug sections or
1913 non-constant sections. */
1914 if (info->shared
1915 && (sec->flags & SEC_ALLOC) != 0
1916 && (sec->flags & SEC_READONLY) != 0)
1917 {
09a24cbf 1918 if (h)
4c544807
L		 1919 name = h->root.root.string;
1920 else
1921 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1b71fb54 1922 (*_bfd_error_handler)
d003868e 1923 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
4c544807 1924 abfd, x86_64_elf_howto_table[r_type].name, name);
1b71fb54 1925 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1926 return FALSE;
1b71fb54
AJ		 1927 }
1928 /* Fall through. */
1929
c434dee6
AJ		 1930 case R_X86_64_PC8:
1931 case R_X86_64_PC16:
70256ad8 1932 case R_X86_64_PC32:
c3320543 1933 case R_X86_64_PC32_BND:
d6ab8113 1934 case R_X86_64_PC64:
1b71fb54 1935 case R_X86_64_64:
248775ba 1936pointer:
710ab287 1937 if (h != NULL && info->executable)
c434dee6
AJ		 1938 {
1939 /* If this reloc is in a read-only section, we might
1940 need a copy reloc. We can't check reliably at this
1941 stage whether the section is read-only, as input
1942 sections have not yet been mapped to output sections.
1943 Tentatively set the flag for now, and correct in
1944 adjust_dynamic_symbol. */
f5385ebf 1945 h->non_got_ref = 1;
c434dee6
AJ		 1946
1947 /* We may need a .plt entry if the function this reloc
1948 refers to is in a shared lib. */
1949 h->plt.refcount += 1;
c3320543
L		 1950 if (r_type != R_X86_64_PC32
1951 && r_type != R_X86_64_PC32_BND
1952 && r_type != R_X86_64_PC64)
f5385ebf 1953 h->pointer_equality_needed = 1;
c434dee6 1954 }
70256ad8 1955
06a6a421 1956 size_reloc = FALSE;
6a3e1bae 1957do_size:
70256ad8
AJ		 1958 /* If we are creating a shared library, and this is a reloc
1959 against a global symbol, or a non PC relative reloc
1960 against a local symbol, then we need to copy the reloc
1961 into the shared library. However, if we are linking with
1962 -Bsymbolic, we do not need to copy a reloc against a
1963 global symbol which is defined in an object we are
407443a3 1964 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ		 1965 this point we have not seen all the input files, so it is
1966 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ		 1967 later (it is never cleared). In case of a weak definition,
1968 DEF_REGULAR may be cleared later by a strong definition in
1969 a shared library. We account for that possibility below by
1970 storing information in the relocs_copied field of the hash
1971 table entry. A similar situation occurs when creating
1972 shared libraries and symbol visibility changes render the
31c0ebfe 1973 symbol local.
c434dee6
AJ		 1974
1975 If on the other hand, we are creating an executable, we
1976 may need to keep relocations for symbols satisfied by a
1977 dynamic library if we manage to avoid copy relocs for the
0f88be7a 1978 symbol. */
c434dee6
AJ		 1979 if ((info->shared
1980 && (sec->flags & SEC_ALLOC) != 0
d8045f23 1981 && (! IS_X86_64_PCREL_TYPE (r_type)
c434dee6 1982 || (h != NULL
55255dae 1983 && (! SYMBOLIC_BIND (info, h)
c434dee6 1984 || h->root.type == bfd_link_hash_defweak
f5385ebf 1985 || !h->def_regular))))
d40d037c
AJ		 1986 || (ELIMINATE_COPY_RELOCS
1987 && !info->shared
c434dee6
AJ		 1988 && (sec->flags & SEC_ALLOC) != 0
1989 && h != NULL
1990 && (h->root.type == bfd_link_hash_defweak
0f88be7a 1991 || !h->def_regular)))
70256ad8 1992 {
e03a8ed8
L		 1993 struct elf_dyn_relocs *p;
1994 struct elf_dyn_relocs **head;
c434dee6
AJ		 1995
1996 /* We must copy these reloc types into the output file.
1997 Create a reloc section in dynobj and make room for
1998 this reloc. */
70256ad8
AJ		 1999 if (sreloc == NULL)
2000 {
c434dee6
AJ		 2001 if (htab->elf.dynobj == NULL)
2002 htab->elf.dynobj = abfd;
2003
83bac4b0 2004 sreloc = _bfd_elf_make_dynamic_reloc_section
82e96e07
L		 2005 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2006 abfd, /*rela?*/ TRUE);
70256ad8 2007
70256ad8 2008 if (sreloc == NULL)
c2e61a4e 2009 return FALSE;
70256ad8
AJ		 2010 }
2011
c434dee6
AJ		 2012 /* If this is a global symbol, we count the number of
2013 relocations we need for this symbol. */
2014 if (h != NULL)
70256ad8 2015 {
351f65ca 2016 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
c434dee6
AJ		 2017 }
2018 else
2019 {
2020 /* Track dynamic relocs needed for local syms too.
2021 We really need local syms available to do this
2022 easily. Oh well. */
c434dee6 2023 asection *s;
87d72d41 2024 void **vpp;
87d72d41
AM		 2025
2026 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2027 abfd, r_symndx);
2028 if (isym == NULL)
2029 return FALSE;
2030
2031 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
c434dee6 2032 if (s == NULL)
87d72d41 2033 s = sec;
70256ad8 2034
e81d3500
DD		 2035 /* Beware of type punned pointers vs strict aliasing
2036 rules. */
2037 vpp = &(elf_section_data (s)->local_dynrel);
e03a8ed8 2038 head = (struct elf_dyn_relocs **)vpp;
c434dee6 2039 }
70256ad8 2040
c434dee6
AJ		 2041 p = *head;
2042 if (p == NULL || p->sec != sec)
2043 {
2044 bfd_size_type amt = sizeof *p;
d8045f23 2045
e03a8ed8 2046 p = ((struct elf_dyn_relocs *)
c434dee6 2047 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 2048 if (p == NULL)
c2e61a4e 2049 return FALSE;
c434dee6
AJ		 2050 p->next = *head;
2051 *head = p;
2052 p->sec = sec;
2053 p->count = 0;
2054 p->pc_count = 0;
70256ad8 2055 }
c434dee6
AJ		 2056
2057 p->count += 1;
06a6a421
L		 2058 /* Count size relocation as PC-relative relocation. */
2059 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
c434dee6 2060 p->pc_count += 1;
70256ad8
AJ		 2061 }
2062 break;
fe4770f4
AJ		 2063
2064 /* This relocation describes the C++ object vtable hierarchy.
2065 Reconstruct it for later use during GC. */
2066 case R_X86_64_GNU_VTINHERIT:
c152c796 2067 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 2068 return FALSE;
fe4770f4
AJ		 2069 break;
2070
2071 /* This relocation describes which C++ vtable entries are actually
2072 used. Record for later use during GC. */
2073 case R_X86_64_GNU_VTENTRY:
d17e0c6e
JB		 2074 BFD_ASSERT (h != NULL);
2075 if (h != NULL
2076 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
c2e61a4e 2077 return FALSE;
fe4770f4 2078 break;
c434dee6
AJ		 2079
2080 default:
2081 break;
70256ad8 2082 }
dd7e64d4
L		 2083
2084 if (use_plt_got
2085 && h != NULL
2086 && h->plt.refcount > 0
8ded2ddc
L		 2087 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2088 || h->got.refcount > 0)
dd7e64d4
L		 2089 && htab->plt_got == NULL)
2090 {
2091 /* Create the GOT procedure linkage table. */
2092 unsigned int plt_got_align;
2093 const struct elf_backend_data *bed;
2094
2095 bed = get_elf_backend_data (info->output_bfd);
2096 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8
2097 && (sizeof (elf_x86_64_bnd_plt2_entry)
2098 == sizeof (elf_x86_64_legacy_plt2_entry)));
2099 plt_got_align = 3;
2100
2101 if (htab->elf.dynobj == NULL)
2102 htab->elf.dynobj = abfd;
2103 htab->plt_got
2104 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2105 ".plt.got",
2106 (bed->dynamic_sec_flags
2107 | SEC_ALLOC
2108 | SEC_CODE
2109 | SEC_LOAD
2110 | SEC_READONLY));
2111 if (htab->plt_got == NULL
2112 || !bfd_set_section_alignment (htab->elf.dynobj,
2113 htab->plt_got,
2114 plt_got_align))
2115 return FALSE;
2116 }
c1d11331
L		 2117
2118 if (r_type == R_X86_64_GOTPCREL
2119 && (h == NULL || h->type != STT_GNU_IFUNC))
2120 sec->need_convert_mov_to_lea = 1;
70256ad8
AJ		 2121 }
2122
b34976b6 2123 return TRUE;
70256ad8
AJ		 2124}
2125
2126/* Return the section that should be marked against GC for a given
407443a3 2127 relocation. */
70256ad8
AJ		 2128
2129static asection *
351f65ca
L		 2130elf_x86_64_gc_mark_hook (asection *sec,
2131 struct bfd_link_info *info,
2132 Elf_Internal_Rela *rel,
2133 struct elf_link_hash_entry *h,
2134 Elf_Internal_Sym *sym)
70256ad8
AJ		 2135{
2136 if (h != NULL)
351f65ca 2137 switch (ELF32_R_TYPE (rel->r_info))
07adf181
AM		 2138 {
2139 case R_X86_64_GNU_VTINHERIT:
2140 case R_X86_64_GNU_VTENTRY:
2141 return NULL;
2142 }
2143
2144 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
70256ad8
AJ		 2145}
2146
407443a3 2147/* Update the got entry reference counts for the section being removed. */
70256ad8 2148
b34976b6 2149static bfd_boolean
351f65ca
L		 2150elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
2151 asection *sec,
2152 const Elf_Internal_Rela *relocs)
70256ad8 2153{
351f65ca 2154 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 2155 Elf_Internal_Shdr *symtab_hdr;
2156 struct elf_link_hash_entry **sym_hashes;
2157 bfd_signed_vma *local_got_refcounts;
2158 const Elf_Internal_Rela *rel, *relend;
c434dee6 2159
7dda2462
TG		 2160 if (info->relocatable)
2161 return TRUE;
2162
351f65ca 2163 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2164 if (htab == NULL)
2165 return FALSE;
2166
c434dee6 2167 elf_section_data (sec)->local_dynrel = NULL;
70256ad8 2168
0ffa91dd 2169 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8
AJ		 2170 sym_hashes = elf_sym_hashes (abfd);
2171 local_got_refcounts = elf_local_got_refcounts (abfd);
2172
351f65ca 2173 htab = elf_x86_64_hash_table (info);
70256ad8
AJ		 2174 relend = relocs + sec->reloc_count;
2175 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 2176 {
2177 unsigned long r_symndx;
2178 unsigned int r_type;
2179 struct elf_link_hash_entry *h = NULL;
70256ad8 2180
351f65ca 2181 r_symndx = htab->r_sym (rel->r_info);
26e41594
AM		 2182 if (r_symndx >= symtab_hdr->sh_info)
2183 {
26e41594 2184 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 2185 while (h->root.type == bfd_link_hash_indirect
2186 || h->root.type == bfd_link_hash_warning)
2187 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 2188 }
bb1cb422
L		 2189 else
2190 {
2191 /* A local symbol. */
2192 Elf_Internal_Sym *isym;
2193
2194 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2195 abfd, r_symndx);
2196
2197 /* Check relocation against local STT_GNU_IFUNC symbol. */
2198 if (isym != NULL
82e96e07 2199 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
bb1cb422 2200 {
351f65ca 2201 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
bb1cb422
L		 2202 if (h == NULL)
2203 abort ();
2204 }
2205 }
c434dee6 2206
3db2e7dd
L		 2207 if (h)
2208 {
2209 struct elf_x86_64_link_hash_entry *eh;
2210 struct elf_dyn_relocs **pp;
2211 struct elf_dyn_relocs *p;
2212
2213 eh = (struct elf_x86_64_link_hash_entry *) h;
2214
2215 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2216 if (p->sec == sec)
2217 {
2218 /* Everything must go for SEC. */
2219 *pp = p->next;
2220 break;
2221 }
2222 }
2223
351f65ca
L		 2224 r_type = ELF32_R_TYPE (rel->r_info);
2225 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
2226 symtab_hdr, sym_hashes,
2227 &r_type, GOT_UNKNOWN,
2228 rel, relend, h, r_symndx))
142411ca
L		 2229 return FALSE;
2230
26e41594
AM		 2231 switch (r_type)
2232 {
2233 case R_X86_64_TLSLD:
4dfe6ac6
NC		 2234 if (htab->tls_ld_got.refcount > 0)
2235 htab->tls_ld_got.refcount -= 1;
26e41594 2236 break;
c434dee6 2237
26e41594 2238 case R_X86_64_TLSGD:
67a4f2b7
AO		 2239 case R_X86_64_GOTPC32_TLSDESC:
2240 case R_X86_64_TLSDESC_CALL:
26e41594
AM		 2241 case R_X86_64_GOTTPOFF:
2242 case R_X86_64_GOT32:
2243 case R_X86_64_GOTPCREL:
7b81dfbb
AJ		 2244 case R_X86_64_GOT64:
2245 case R_X86_64_GOTPCREL64:
2246 case R_X86_64_GOTPLT64:
26e41594
AM		 2247 if (h != NULL)
2248 {
2249 if (h->got.refcount > 0)
2250 h->got.refcount -= 1;
bb1cb422
L		 2251 if (h->type == STT_GNU_IFUNC)
2252 {
2253 if (h->plt.refcount > 0)
2254 h->plt.refcount -= 1;
2255 }
26e41594
AM		 2256 }
2257 else if (local_got_refcounts != NULL)
2258 {
2259 if (local_got_refcounts[r_symndx] > 0)
2260 local_got_refcounts[r_symndx] -= 1;
2261 }
2262 break;
c434dee6 2263
26e41594
AM		 2264 case R_X86_64_8:
2265 case R_X86_64_16:
2266 case R_X86_64_32:
2267 case R_X86_64_64:
2268 case R_X86_64_32S:
2269 case R_X86_64_PC8:
2270 case R_X86_64_PC16:
2271 case R_X86_64_PC32:
c3320543 2272 case R_X86_64_PC32_BND:
d6ab8113 2273 case R_X86_64_PC64:
1788fc08
L		 2274 case R_X86_64_SIZE32:
2275 case R_X86_64_SIZE64:
3db2e7dd
L		 2276 if (info->shared
2277 && (h == NULL || h->type != STT_GNU_IFUNC))
26e41594
AM		 2278 break;
2279 /* Fall thru */
c434dee6 2280
26e41594 2281 case R_X86_64_PLT32:
c3320543 2282 case R_X86_64_PLT32_BND:
7b81dfbb 2283 case R_X86_64_PLTOFF64:
26e41594
AM		 2284 if (h != NULL)
2285 {
2286 if (h->plt.refcount > 0)
2287 h->plt.refcount -= 1;
2288 }
2289 break;
70256ad8 2290
26e41594
AM		 2291 default:
2292 break;
2293 }
2294 }
70256ad8 2295
b34976b6 2296 return TRUE;
70256ad8
AJ		 2297}
2298
2299/* Adjust a symbol defined by a dynamic object and referenced by a
2300 regular object. The current definition is in some section of the
2301 dynamic object, but we're not including those sections. We have to
2302 change the definition to something the rest of the link can
407443a3 2303 understand. */
70256ad8 2304
b34976b6 2305static bfd_boolean
351f65ca
L		 2306elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2307 struct elf_link_hash_entry *h)
70256ad8 2308{
351f65ca 2309 struct elf_x86_64_link_hash_table *htab;
70256ad8 2310 asection *s;
5ca5bb35
L		 2311 struct elf_x86_64_link_hash_entry *eh;
2312 struct elf_dyn_relocs *p;
70256ad8 2313
cbe950e9
L		 2314 /* STT_GNU_IFUNC symbol must go through PLT. */
2315 if (h->type == STT_GNU_IFUNC)
2316 {
73bcf233
L		 2317 /* All local STT_GNU_IFUNC references must be treate as local
2318 calls via local PLT. */
5ca5bb35
L		 2319 if (h->ref_regular
2320 && SYMBOL_CALLS_LOCAL (info, h))
2321 {
73bcf233 2322 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L		 2323 struct elf_dyn_relocs **pp;
2324
2325 eh = (struct elf_x86_64_link_hash_entry *) h;
2326 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2327 {
2328 pc_count += p->pc_count;
2329 p->count -= p->pc_count;
2330 p->pc_count = 0;
73bcf233 2331 count += p->count;
5ca5bb35
L		 2332 if (p->count == 0)
2333 *pp = p->next;
2334 else
2335 pp = &p->next;
2336 }
2337
73bcf233 2338 if (pc_count || count)
5ca5bb35
L		 2339 {
2340 h->needs_plt = 1;
5ca5bb35 2341 h->non_got_ref = 1;
a5479e5f
L		 2342 if (h->plt.refcount <= 0)
2343 h->plt.refcount = 1;
2344 else
2345 h->plt.refcount += 1;
5ca5bb35
L		 2346 }
2347 }
2348
cbe950e9
L		 2349 if (h->plt.refcount <= 0)
2350 {
2351 h->plt.offset = (bfd_vma) -1;
2352 h->needs_plt = 0;
2353 }
2354 return TRUE;
2355 }
2356
70256ad8
AJ		 2357 /* If this is a function, put it in the procedure linkage table. We
2358 will fill in the contents of the procedure linkage table later,
2359 when we know the address of the .got section. */
2360 if (h->type == STT_FUNC
f5385ebf 2361 || h->needs_plt)
70256ad8 2362 {
c434dee6 2363 if (h->plt.refcount <= 0
27482721
AJ		 2364 || SYMBOL_CALLS_LOCAL (info, h)
2365 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2366 && h->root.type == bfd_link_hash_undefweak))
70256ad8 2367 {
70256ad8
AJ		 2368 /* This case can occur if we saw a PLT32 reloc in an input
2369 file, but the symbol was never referred to by a dynamic
2370 object, or if all references were garbage collected. In
2371 such a case, we don't actually need to build a procedure
2372 linkage table, and we can just do a PC32 reloc instead. */
70256ad8 2373 h->plt.offset = (bfd_vma) -1;
f5385ebf 2374 h->needs_plt = 0;
70256ad8
AJ		 2375 }
2376
b34976b6 2377 return TRUE;
70256ad8 2378 }
bbd7ec4a 2379 else
c434dee6
AJ		 2380 /* It's possible that we incorrectly decided a .plt reloc was
2381 needed for an R_X86_64_PC32 reloc to a non-function sym in
2382 check_relocs. We can't decide accurately between function and
2383 non-function syms in check-relocs; Objects loaded later in
2384 the link may change h->type. So fix it now. */
bbd7ec4a 2385 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ		 2386
2387 /* If this is a weak symbol, and there is a real definition, the
2388 processor independent code will have arranged for us to see the
407443a3 2389 real definition first, and we can just use the same value. */
f6e332e6 2390 if (h->u.weakdef != NULL)
70256ad8 2391 {
f6e332e6
AM		 2392 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2393 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2394 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2395 h->root.u.def.value = h->u.weakdef->root.u.def.value;
d40d037c 2396 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
bc696fd5
L		 2397 {
2398 eh = (struct elf_x86_64_link_hash_entry *) h;
2399 h->non_got_ref = h->u.weakdef->non_got_ref;
2400 eh->needs_copy = h->u.weakdef->needs_copy;
2401 }
b34976b6 2402 return TRUE;
70256ad8
AJ		 2403 }
2404
2405 /* This is a reference to a symbol defined by a dynamic object which
407443a3 2406 is not a function. */
70256ad8
AJ		 2407
2408 /* If we are creating a shared library, we must presume that the
2409 only references to the symbol are via the global offset table.
2410 For such cases we need not do anything here; the relocations will
407443a3 2411 be handled correctly by relocate_section. */
9a926d55 2412 if (!info->executable)
b34976b6 2413 return TRUE;
70256ad8
AJ		 2414
2415 /* If there are no references to this symbol that do not use the
2416 GOT, we don't need to generate a copy reloc. */
f5385ebf 2417 if (!h->non_got_ref)
b34976b6 2418 return TRUE;
70256ad8 2419
c434dee6
AJ		 2420 /* If -z nocopyreloc was given, we won't generate them either. */
2421 if (info->nocopyreloc)
2422 {
f5385ebf 2423 h->non_got_ref = 0;
b34976b6 2424 return TRUE;
c434dee6
AJ		 2425 }
2426
31c0ebfe 2427 if (ELIMINATE_COPY_RELOCS)
c434dee6 2428 {
351f65ca 2429 eh = (struct elf_x86_64_link_hash_entry *) h;
d40d037c
AJ		 2430 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2431 {
2432 s = p->sec->output_section;
2433 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2434 break;
2435 }
2436
2437 /* If we didn't find any dynamic relocs in read-only sections, then
2438 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2439 if (p == NULL)
2440 {
f5385ebf 2441 h->non_got_ref = 0;
d40d037c
AJ		 2442 return TRUE;
2443 }
c434dee6
AJ		 2444 }
2445
70256ad8 2446 /* We must allocate the symbol in our .dynbss section, which will
407443a3 2447 become part of the .bss section of the executable. There will be
70256ad8
AJ		 2448 an entry for this symbol in the .dynsym section. The dynamic
2449 object will contain position independent code, so all references
2450 from the dynamic object to this symbol will go through the global
2451 offset table. The dynamic linker will use the .dynsym entry to
2452 determine the address it must put in the global offset table, so
2453 both the dynamic object and the regular object will refer to the
2454 same memory location for the variable. */
2455
351f65ca 2456 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2457 if (htab == NULL)
2458 return FALSE;
70256ad8
AJ		 2459
2460 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2461 to copy the initial value out of the dynamic object and into the
cedb70c5 2462 runtime process image. */
1d7e9d18 2463 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
70256ad8 2464 {
351f65ca
L		 2465 const struct elf_backend_data *bed;
2466 bed = get_elf_backend_data (info->output_bfd);
2467 htab->srelbss->size += bed->s->sizeof_rela;
f5385ebf 2468 h->needs_copy = 1;
70256ad8
AJ		 2469 }
2470
c434dee6 2471 s = htab->sdynbss;
70256ad8 2472
6cabe1ea 2473 return _bfd_elf_adjust_dynamic_copy (info, h, s);
70256ad8
AJ		 2474}
2475
c434dee6
AJ		 2476/* Allocate space in .plt, .got and associated reloc sections for
2477 dynamic relocs. */
2478
b34976b6 2479static bfd_boolean
351f65ca 2480elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 2481{
2482 struct bfd_link_info *info;
351f65ca
L		 2483 struct elf_x86_64_link_hash_table *htab;
2484 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2485 struct elf_dyn_relocs *p;
351f65ca 2486 const struct elf_backend_data *bed;
eed180f8 2487 unsigned int plt_entry_size;
c434dee6 2488
e92d460e 2489 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2490 return TRUE;
c434dee6 2491
351f65ca 2492 eh = (struct elf_x86_64_link_hash_entry *) h;
e92d460e 2493
c434dee6 2494 info = (struct bfd_link_info *) inf;
351f65ca 2495 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2496 if (htab == NULL)
2497 return FALSE;
351f65ca 2498 bed = get_elf_backend_data (info->output_bfd);
eed180f8 2499 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
c434dee6 2500
dd7e64d4
L		 2501 /* We can't use the GOT PLT if pointer equality is needed since
2502 finish_dynamic_symbol won't clear symbol value and the dynamic
2503 linker won't update the GOT slot. We will get into an infinite
2504 loop at run-time. */
2505 if (htab->plt_got != NULL
2506 && h->type != STT_GNU_IFUNC
2507 && !h->pointer_equality_needed
2508 && h->plt.refcount > 0
2509 && h->got.refcount > 0)
2510 {
2511 /* Don't use the regular PLT if there are both GOT and GOTPLT
2512 reloctions. */
2513 h->plt.offset = (bfd_vma) -1;
2514
2515 /* Use the GOT PLT. */
2516 eh->plt_got.refcount = 1;
2517 }
2518
cbe950e9
L		 2519 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2520 here if it is defined and referenced in a non-shared object. */
2521 if (h->type == STT_GNU_IFUNC
2522 && h->def_regular)
0ff2b86e
L		 2523 {
2524 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2525 &eh->dyn_relocs,
2526 plt_entry_size,
2527 plt_entry_size,
2528 GOT_ENTRY_SIZE))
2529 {
2530 asection *s = htab->plt_bnd;
2531 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2532 {
2533 /* Use the .plt.bnd section if it is created. */
2534 eh->plt_bnd.offset = s->size;
2535
2536 /* Make room for this entry in the .plt.bnd section. */
2537 s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2538 }
2539
2540 return TRUE;
2541 }
2542 else
2543 return FALSE;
2544 }
cbe950e9 2545 else if (htab->elf.dynamic_sections_created
dd7e64d4 2546 && (h->plt.refcount > 0 || eh->plt_got.refcount > 0))
c434dee6 2547 {
25070364
L		 2548 bfd_boolean use_plt_got;
2549
8ded2ddc 2550 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
25070364
L		 2551 {
2552 /* Don't use the regular PLT for DF_BIND_NOW. */
2553 h->plt.offset = (bfd_vma) -1;
2554
2555 /* Use the GOT PLT. */
2556 h->got.refcount = 1;
2557 eh->plt_got.refcount = 1;
2558 }
2559
2560 use_plt_got = eh->plt_got.refcount > 0;
dd7e64d4 2561
c434dee6
AJ		 2562 /* Make sure this symbol is output as a dynamic symbol.
2563 Undefined weak syms won't yet be marked as dynamic. */
2564 if (h->dynindx == -1
f5385ebf 2565 && !h->forced_local)
c434dee6 2566 {
c152c796 2567 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2568 return FALSE;
c434dee6
AJ		 2569 }
2570
27482721
AJ		 2571 if (info->shared
2572 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6 2573 {
6de2ae4a 2574 asection *s = htab->elf.splt;
0ff2b86e 2575 asection *bnd_s = htab->plt_bnd;
dd7e64d4 2576 asection *got_s = htab->plt_got;
c434dee6 2577
7c1e8d3e
L		 2578 /* If this is the first .plt entry, make room for the special
2579 first entry. The .plt section is used by prelink to undo
2580 prelinking for dynamic relocations. */
2581 if (s->size == 0)
2582 s->size = plt_entry_size;
2583
dd7e64d4
L		 2584 if (use_plt_got)
2585 eh->plt_got.offset = got_s->size;
2586 else
2587 {
2588 h->plt.offset = s->size;
2589 if (bnd_s)
2590 eh->plt_bnd.offset = bnd_s->size;
2591 }
c434dee6
AJ		 2592
2593 /* If this symbol is not defined in a regular file, and we are
2594 not generating a shared library, then set the symbol to this
2595 location in the .plt. This is required to make function
2596 pointers compare as equal between the normal executable and
2597 the shared library. */
2598 if (! info->shared
f5385ebf 2599 && !h->def_regular)
c434dee6 2600 {
dd7e64d4 2601 if (use_plt_got)
0ff2b86e 2602 {
dd7e64d4
L		 2603 /* We need to make a call to the entry of the GOT PLT
2604 instead of regular PLT entry. */
2605 h->root.u.def.section = got_s;
2606 h->root.u.def.value = eh->plt_got.offset;
0ff2b86e
L		 2607 }
2608 else
2609 {
dd7e64d4
L		 2610 if (bnd_s)
2611 {
2612 /* We need to make a call to the entry of the second
2613 PLT instead of regular PLT entry. */
2614 h->root.u.def.section = bnd_s;
2615 h->root.u.def.value = eh->plt_bnd.offset;
2616 }
2617 else
2618 {
2619 h->root.u.def.section = s;
2620 h->root.u.def.value = h->plt.offset;
2621 }
0ff2b86e 2622 }
c434dee6
AJ		 2623 }
2624
2625 /* Make room for this entry. */
dd7e64d4
L		 2626 if (use_plt_got)
2627 got_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2628 else
2629 {
2630 s->size += plt_entry_size;
2631 if (bnd_s)
2632 bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
c434dee6 2633
dd7e64d4
L		 2634 /* We also need to make an entry in the .got.plt section,
2635 which will be placed in the .got section by the linker
2636 script. */
2637 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
c434dee6 2638
dd7e64d4
L		 2639 /* We also need to make an entry in the .rela.plt
2640 section. */
2641 htab->elf.srelplt->size += bed->s->sizeof_rela;
2642 htab->elf.srelplt->reloc_count++;
2643 }
c434dee6
AJ		 2644 }
2645 else
2646 {
2647 h->plt.offset = (bfd_vma) -1;
f5385ebf 2648 h->needs_plt = 0;
c434dee6
AJ		 2649 }
2650 }
2651 else
2652 {
2653 h->plt.offset = (bfd_vma) -1;
f5385ebf 2654 h->needs_plt = 0;
c434dee6
AJ		 2655 }
2656
67a4f2b7
AO		 2657 eh->tlsdesc_got = (bfd_vma) -1;
2658
bffbf940
JJ		 2659 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2660 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2661 if (h->got.refcount > 0
1d85728f 2662 && info->executable
bffbf940 2663 && h->dynindx == -1
351f65ca 2664 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
d8045f23
NC		 2665 {
2666 h->got.offset = (bfd_vma) -1;
2667 }
bffbf940 2668 else if (h->got.refcount > 0)
c434dee6
AJ		 2669 {
2670 asection *s;
b34976b6 2671 bfd_boolean dyn;
351f65ca 2672 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ		 2673
2674 /* Make sure this symbol is output as a dynamic symbol.
2675 Undefined weak syms won't yet be marked as dynamic. */
2676 if (h->dynindx == -1
f5385ebf 2677 && !h->forced_local)
c434dee6 2678 {
c152c796 2679 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2680 return FALSE;
c434dee6
AJ		 2681 }
2682
67a4f2b7
AO		 2683 if (GOT_TLS_GDESC_P (tls_type))
2684 {
6de2ae4a 2685 eh->tlsdesc_got = htab->elf.sgotplt->size
351f65ca 2686 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2687 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 2688 h->got.offset = (bfd_vma) -2;
2689 }
2690 if (! GOT_TLS_GDESC_P (tls_type)
2691 || GOT_TLS_GD_P (tls_type))
2692 {
6de2ae4a 2693 s = htab->elf.sgot;
67a4f2b7
AO		 2694 h->got.offset = s->size;
2695 s->size += GOT_ENTRY_SIZE;
2696 if (GOT_TLS_GD_P (tls_type))
2697 s->size += GOT_ENTRY_SIZE;
2698 }
c434dee6 2699 dyn = htab->elf.dynamic_sections_created;
bffbf940
JJ		 2700 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2701 and two if global.
2702 R_X86_64_GOTTPOFF needs one dynamic relocation. */
67a4f2b7 2703 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
bffbf940 2704 || tls_type == GOT_TLS_IE)
351f65ca 2705 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7 2706 else if (GOT_TLS_GD_P (tls_type))
351f65ca 2707 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
67a4f2b7
AO		 2708 else if (! GOT_TLS_GDESC_P (tls_type)
2709 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2710 || h->root.type != bfd_link_hash_undefweak)
27482721
AJ		 2711 && (info->shared
2712 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
351f65ca 2713 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2714 if (GOT_TLS_GDESC_P (tls_type))
2715 {
351f65ca 2716 htab->elf.srelplt->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2717 htab->tlsdesc_plt = (bfd_vma) -1;
2718 }
c434dee6
AJ		 2719 }
2720 else
2721 h->got.offset = (bfd_vma) -1;
2722
c434dee6 2723 if (eh->dyn_relocs == NULL)
b34976b6 2724 return TRUE;
c434dee6
AJ		 2725
2726 /* In the shared -Bsymbolic case, discard space allocated for
2727 dynamic pc-relative relocs against symbols which turn out to be
2728 defined in regular objects. For the normal shared case, discard
2729 space for pc-relative relocs that have become local due to symbol
2730 visibility changes. */
2731
2732 if (info->shared)
2733 {
27482721
AJ		 2734 /* Relocs that use pc_count are those that appear on a call
2735 insn, or certain REL relocs that can generated via assembly.
2736 We want calls to protected symbols to resolve directly to the
2737 function rather than going via the plt. If people want
2738 function pointer comparisons to work as expected then they
2739 should avoid writing weird assembly. */
2740 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6 2741 {
e03a8ed8 2742 struct elf_dyn_relocs **pp;
c434dee6
AJ		 2743
2744 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2745 {
c3ce498c
L		 2746 p->count -= p->pc_count;
2747 p->pc_count = 0;
c434dee6
AJ		 2748 if (p->count == 0)
2749 *pp = p->next;
2750 else
2751 pp = &p->next;
2752 }
2753 }
4e795f50
AM		 2754
2755 /* Also discard relocs on undefined weak syms with non-default
c353e543 2756 visibility. */
31c0ebfe 2757 if (eh->dyn_relocs != NULL)
22d606e9 2758 {
31c0ebfe
L		 2759 if (h->root.type == bfd_link_hash_undefweak)
2760 {
2761 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2762 eh->dyn_relocs = NULL;
2763
2764 /* Make sure undefined weak symbols are output as a dynamic
2765 symbol in PIEs. */
2766 else if (h->dynindx == -1
2767 && ! h->forced_local
2768 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2769 return FALSE;
2770 }
9d1d54d5
L		 2771 /* For PIE, discard space for pc-relative relocs against
2772 symbols which turn out to need copy relocs. */
31c0ebfe 2773 else if (info->executable
bc696fd5 2774 && (h->needs_copy || eh->needs_copy)
31c0ebfe
L		 2775 && h->def_dynamic
2776 && !h->def_regular)
9d1d54d5
L		 2777 {
2778 struct elf_dyn_relocs **pp;
2779
2780 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2781 {
2782 if (p->pc_count != 0)
2783 *pp = p->next;
2784 else
2785 pp = &p->next;
2786 }
2787 }
22d606e9 2788 }
d8045f23 2789 }
d40d037c 2790 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ		 2791 {
2792 /* For the non-shared case, discard space for relocs against
2793 symbols which turn out to need copy relocs or are not
2794 dynamic. */
2795
f5385ebf
AM		 2796 if (!h->non_got_ref
2797 && ((h->def_dynamic
2798 && !h->def_regular)
c434dee6
AJ		 2799 || (htab->elf.dynamic_sections_created
2800 && (h->root.type == bfd_link_hash_undefweak
2801 || h->root.type == bfd_link_hash_undefined))))
2802 {
2803 /* Make sure this symbol is output as a dynamic symbol.
2804 Undefined weak syms won't yet be marked as dynamic. */
2805 if (h->dynindx == -1
d8045f23
NC		 2806 && ! h->forced_local
2807 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2808 return FALSE;
c434dee6
AJ		 2809
2810 /* If that succeeded, we know we'll be keeping all the
2811 relocs. */
2812 if (h->dynindx != -1)
2813 goto keep;
2814 }
2815
2816 eh->dyn_relocs = NULL;
2817
2818 keep: ;
2819 }
2820
2821 /* Finally, allocate space. */
2822 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2823 {
e7c33416
NC		 2824 asection * sreloc;
2825
cbe950e9 2826 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2827
2828 BFD_ASSERT (sreloc != NULL);
2829
351f65ca 2830 sreloc->size += p->count * bed->s->sizeof_rela;
c434dee6
AJ		 2831 }
2832
b34976b6 2833 return TRUE;
c434dee6
AJ		 2834}
2835
c25bc9fc
L		 2836/* Allocate space in .plt, .got and associated reloc sections for
2837 local dynamic relocs. */
2838
2839static bfd_boolean
351f65ca 2840elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
c25bc9fc
L		 2841{
2842 struct elf_link_hash_entry *h
2843 = (struct elf_link_hash_entry *) *slot;
2844
2845 if (h->type != STT_GNU_IFUNC
2846 || !h->def_regular
2847 || !h->ref_regular
2848 || !h->forced_local
2849 || h->root.type != bfd_link_hash_defined)
2850 abort ();
2851
351f65ca 2852 return elf_x86_64_allocate_dynrelocs (h, inf);
c25bc9fc
L		 2853}
2854
c434dee6
AJ		 2855/* Find any dynamic relocs that apply to read-only sections. */
2856
b34976b6 2857static bfd_boolean
351f65ca
L		 2858elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2859 void * inf)
c434dee6 2860{
351f65ca 2861 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2862 struct elf_dyn_relocs *p;
c434dee6 2863
aa715242
L		 2864 /* Skip local IFUNC symbols. */
2865 if (h->forced_local && h->type == STT_GNU_IFUNC)
2866 return TRUE;
2867
351f65ca 2868 eh = (struct elf_x86_64_link_hash_entry *) h;
c434dee6
AJ		 2869 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2870 {
2871 asection *s = p->sec->output_section;
2872
2873 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2874 {
2875 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2876
2877 info->flags |= DF_TEXTREL;
2878
1952c5cd
L		 2879 if ((info->warn_shared_textrel && info->shared)
2880 || info->error_textrel)
2881 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
b70321a2
L		 2882 p->sec->owner, h->root.root.string,
2883 p->sec);
2884
c434dee6 2885 /* Not an error, just cut short the traversal. */
b34976b6 2886 return FALSE;
c434dee6
AJ		 2887 }
2888 }
b34976b6 2889 return TRUE;
c434dee6
AJ		 2890}
2891
daa67607
L		 2892/* Convert
2893 mov foo@GOTPCREL(%rip), %reg
2894 to
2895 lea foo(%rip), %reg
2896 with the local symbol, foo. */
2897
2898static bfd_boolean
2899elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec,
2900 struct bfd_link_info *link_info)
2901{
2902 Elf_Internal_Shdr *symtab_hdr;
2903 Elf_Internal_Rela *internal_relocs;
2904 Elf_Internal_Rela *irel, *irelend;
2905 bfd_byte *contents;
2906 struct elf_x86_64_link_hash_table *htab;
2907 bfd_boolean changed_contents;
2908 bfd_boolean changed_relocs;
2909 bfd_signed_vma *local_got_refcounts;
59cab532 2910 bfd_vma maxpagesize;
daa67607
L		 2911
2912 /* Don't even try to convert non-ELF outputs. */
2913 if (!is_elf_hash_table (link_info->hash))
2914 return FALSE;
2915
c1d11331 2916 /* Nothing to do if there is no need or no output. */
daa67607 2917 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
c1d11331 2918 || sec->need_convert_mov_to_lea == 0
c8831961 2919 || bfd_is_abs_section (sec->output_section))
daa67607
L		 2920 return TRUE;
2921
2922 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2923
2924 /* Load the relocations for this section. */
2925 internal_relocs = (_bfd_elf_link_read_relocs
2926 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2927 link_info->keep_memory));
2928 if (internal_relocs == NULL)
2929 return FALSE;
2930
2931 htab = elf_x86_64_hash_table (link_info);
2932 changed_contents = FALSE;
2933 changed_relocs = FALSE;
2934 local_got_refcounts = elf_local_got_refcounts (abfd);
59cab532 2935 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
daa67607
L		 2936
2937 /* Get the section contents. */
2938 if (elf_section_data (sec)->this_hdr.contents != NULL)
2939 contents = elf_section_data (sec)->this_hdr.contents;
2940 else
2941 {
2942 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2943 goto error_return;
2944 }
2945
2946 irelend = internal_relocs + sec->reloc_count;
2947 for (irel = internal_relocs; irel < irelend; irel++)
2948 {
2949 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2950 unsigned int r_symndx = htab->r_sym (irel->r_info);
2951 unsigned int indx;
2952 struct elf_link_hash_entry *h;
59cab532
L		 2953 asection *tsec;
2954 char symtype;
2955 bfd_vma toff, roff;
2956 enum {
2957 none, local, global
2958 } convert_mov_to_lea;
dfc87947 2959 unsigned int opcode;
daa67607
L		 2960
2961 if (r_type != R_X86_64_GOTPCREL)
2962 continue;
2963
59cab532
L		 2964 roff = irel->r_offset;
2965
dfc87947
L		 2966 if (roff < 2)
2967 continue;
2968
2969 opcode = bfd_get_8 (abfd, contents + roff - 2);
2970
2971 /* PR ld/18591: Don't convert R_X86_64_GOTPCREL relocation if it
2972 isn't for mov instruction. */
2973 if (opcode != 0x8b)
59cab532
L		 2974 continue;
2975
2976 tsec = NULL;
2977 convert_mov_to_lea = none;
2978
daa67607
L		 2979 /* Get the symbol referred to by the reloc. */
2980 if (r_symndx < symtab_hdr->sh_info)
2981 {
2982 Elf_Internal_Sym *isym;
2983
7cc152be
L		 2984 /* Silence older GCC warning. */
2985 h = NULL;
2986
daa67607
L		 2987 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2988 abfd, r_symndx);
2989
59cab532
L		 2990 symtype = ELF_ST_TYPE (isym->st_info);
2991
2992 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation and
2993 skip relocation against undefined symbols. */
2994 if (symtype != STT_GNU_IFUNC && isym->st_shndx != SHN_UNDEF)
daa67607 2995 {
59cab532
L		 2996 if (isym->st_shndx == SHN_ABS)
2997 tsec = bfd_abs_section_ptr;
2998 else if (isym->st_shndx == SHN_COMMON)
2999 tsec = bfd_com_section_ptr;
3000 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
3001 tsec = &_bfd_elf_large_com_section;
3002 else
3003 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3004
3005 toff = isym->st_value;
3006 convert_mov_to_lea = local;
3007 }
3008 }
3009 else
3010 {
3011 indx = r_symndx - symtab_hdr->sh_info;
3012 h = elf_sym_hashes (abfd)[indx];
3013 BFD_ASSERT (h != NULL);
3014
3015 while (h->root.type == bfd_link_hash_indirect
3016 || h->root.type == bfd_link_hash_warning)
3017 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3018
3019 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
3020 avoid optimizing _DYNAMIC since ld.so may use its link-time
3021 address. */
3022 if (h->def_regular
3023 && h->type != STT_GNU_IFUNC
3024 && h != htab->elf.hdynamic
3025 && SYMBOL_REFERENCES_LOCAL (link_info, h))
3026 {
3027 tsec = h->root.u.def.section;
3028 toff = h->root.u.def.value;
3029 symtype = h->type;
3030 convert_mov_to_lea = global;
3031 }
3032 }
3033
3034 if (convert_mov_to_lea == none)
3035 continue;
3036
3037 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
3038 {
3039 /* At this stage in linking, no SEC_MERGE symbol has been
3040 adjusted, so all references to such symbols need to be
3041 passed through _bfd_merged_section_offset. (Later, in
3042 relocate_section, all SEC_MERGE symbols *except* for
3043 section symbols have been adjusted.)
3044
3045 gas may reduce relocations against symbols in SEC_MERGE
3046 sections to a relocation against the section symbol when
3047 the original addend was zero. When the reloc is against
3048 a section symbol we should include the addend in the
3049 offset passed to _bfd_merged_section_offset, since the
3050 location of interest is the original symbol. On the
3051 other hand, an access to "sym+addend" where "sym" is not
3052 a section symbol should not include the addend; Such an
3053 access is presumed to be an offset from "sym"; The
3054 location of interest is just "sym". */
3055 if (symtype == STT_SECTION)
3056 toff += irel->r_addend;
3057
3058 toff = _bfd_merged_section_offset (abfd, &tsec,
3059 elf_section_data (tsec)->sec_info,
3060 toff);
3061
3062 if (symtype != STT_SECTION)
3063 toff += irel->r_addend;
3064 }
3065 else
3066 toff += irel->r_addend;
3067
3068 /* Don't convert if R_X86_64_PC32 relocation overflows. */
3069 if (tsec->output_section == sec->output_section)
3070 {
3071 if ((toff - roff + 0x80000000) > 0xffffffff)
3072 continue;
3073 }
3074 else
3075 {
3076 asection *asect;
3077 bfd_size_type size;
3078
3079 /* At this point, we don't know the load addresses of TSEC
3080 section nor SEC section. We estimate the distrance between
3081 SEC and TSEC. */
3082 size = 0;
3083 for (asect = sec->output_section;
3084 asect != NULL && asect != tsec->output_section;
3085 asect = asect->next)
3086 {
3087 asection *i;
3088 for (i = asect->output_section->map_head.s;
3089 i != NULL;
3090 i = i->map_head.s)
3091 {
3092 size = align_power (size, i->alignment_power);
3093 size += i->size;
3094 }
daa67607 3095 }
59cab532
L		 3096
3097 /* Don't convert R_X86_64_GOTPCREL if TSEC isn't placed after
3098 SEC. */
3099 if (asect == NULL)
3100 continue;
3101
3102 /* Take PT_GNU_RELRO segment into account by adding
3103 maxpagesize. */
3104 if ((toff + size + maxpagesize - roff + 0x80000000)
3105 > 0xffffffff)
3106 continue;
daa67607
L		 3107 }
3108
59cab532
L		 3109 bfd_put_8 (abfd, 0x8d, contents + roff - 2);
3110 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
3111 changed_contents = TRUE;
3112 changed_relocs = TRUE;
3113
3114 if (convert_mov_to_lea == local)
3115 {
3116 if (local_got_refcounts != NULL
3117 && local_got_refcounts[r_symndx] > 0)
3118 local_got_refcounts[r_symndx] -= 1;
3119 }
3120 else
daa67607 3121 {
daa67607
L		 3122 if (h->got.refcount > 0)
3123 h->got.refcount -= 1;
daa67607
L		 3124 }
3125 }
3126
3127 if (contents != NULL
3128 && elf_section_data (sec)->this_hdr.contents != contents)
3129 {
3130 if (!changed_contents && !link_info->keep_memory)
3131 free (contents);
3132 else
3133 {
3134 /* Cache the section contents for elf_link_input_bfd. */
3135 elf_section_data (sec)->this_hdr.contents = contents;
3136 }
3137 }
3138
3139 if (elf_section_data (sec)->relocs != internal_relocs)
3140 {
3141 if (!changed_relocs)
3142 free (internal_relocs);
3143 else
3144 elf_section_data (sec)->relocs = internal_relocs;
3145 }
3146
3147 return TRUE;
3148
3149 error_return:
3150 if (contents != NULL
3151 && elf_section_data (sec)->this_hdr.contents != contents)
3152 free (contents);
3153 if (internal_relocs != NULL
3154 && elf_section_data (sec)->relocs != internal_relocs)
3155 free (internal_relocs);
3156 return FALSE;
3157}
3158
70256ad8
AJ		 3159/* Set the sizes of the dynamic sections. */
3160
b34976b6 3161static bfd_boolean
351f65ca
L		 3162elf_x86_64_size_dynamic_sections (bfd *output_bfd,
3163 struct bfd_link_info *info)
70256ad8 3164{
351f65ca 3165 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 3166 bfd *dynobj;
3167 asection *s;
b34976b6 3168 bfd_boolean relocs;
c434dee6 3169 bfd *ibfd;
351f65ca 3170 const struct elf_backend_data *bed;
70256ad8 3171
351f65ca 3172 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3173 if (htab == NULL)
3174 return FALSE;
351f65ca 3175 bed = get_elf_backend_data (output_bfd);
4dfe6ac6 3176
c434dee6
AJ		 3177 dynobj = htab->elf.dynobj;
3178 if (dynobj == NULL)
3179 abort ();
70256ad8 3180
c434dee6 3181 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 3182 {
3183 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 3184 if (info->executable)
70256ad8 3185 {
3d4d4302 3186 s = bfd_get_linker_section (dynobj, ".interp");
c434dee6
AJ		 3187 if (s == NULL)
3188 abort ();
351f65ca
L		 3189 s->size = htab->dynamic_interpreter_size;
3190 s->contents = (unsigned char *) htab->dynamic_interpreter;
70256ad8
AJ		 3191 }
3192 }
70256ad8 3193
c434dee6
AJ		 3194 /* Set up .got offsets for local syms, and space for local dynamic
3195 relocs. */
c72f2fb2 3196 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
70256ad8 3197 {
c434dee6
AJ		 3198 bfd_signed_vma *local_got;
3199 bfd_signed_vma *end_local_got;
bffbf940 3200 char *local_tls_type;
67a4f2b7 3201 bfd_vma *local_tlsdesc_gotent;
c434dee6
AJ		 3202 bfd_size_type locsymcount;
3203 Elf_Internal_Shdr *symtab_hdr;
3204 asection *srel;
70256ad8 3205
0ffa91dd 3206 if (! is_x86_64_elf (ibfd))
70256ad8
AJ		 3207 continue;
3208
c434dee6 3209 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 3210 {
e03a8ed8 3211 struct elf_dyn_relocs *p;
c434dee6 3212
daa67607
L		 3213 if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info))
3214 return FALSE;
3215
e03a8ed8 3216 for (p = (struct elf_dyn_relocs *)
e81d3500 3217 (elf_section_data (s)->local_dynrel);
c434dee6
AJ		 3218 p != NULL;
3219 p = p->next)
70256ad8 3220 {
c434dee6
AJ		 3221 if (!bfd_is_abs_section (p->sec)
3222 && bfd_is_abs_section (p->sec->output_section))
3223 {
3224 /* Input section has been discarded, either because
3225 it is a copy of a linkonce section or due to
3226 linker script /DISCARD/, so we'll be discarding
3227 the relocs too. */
3228 }
3229 else if (p->count != 0)
3230 {
3231 srel = elf_section_data (p->sec)->sreloc;
351f65ca 3232 srel->size += p->count * bed->s->sizeof_rela;
4b819e1f
L		 3233 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3234 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 3235 {
3236 info->flags |= DF_TEXTREL;
1952c5cd
L		 3237 if ((info->warn_shared_textrel && info->shared)
3238 || info->error_textrel)
3239 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
b70321a2 3240 p->sec->owner, p->sec);
b70321a2 3241 }
c434dee6 3242 }
70256ad8
AJ		 3243 }
3244 }
c434dee6
AJ		 3245
3246 local_got = elf_local_got_refcounts (ibfd);
3247 if (!local_got)
3248 continue;
3249
0ffa91dd 3250 symtab_hdr = &elf_symtab_hdr (ibfd);
c434dee6
AJ		 3251 locsymcount = symtab_hdr->sh_info;
3252 end_local_got = local_got + locsymcount;
351f65ca
L		 3253 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
3254 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 3255 s = htab->elf.sgot;
3256 srel = htab->elf.srelgot;
67a4f2b7
AO		 3257 for (; local_got < end_local_got;
3258 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
70256ad8 3259 {
67a4f2b7 3260 *local_tlsdesc_gotent = (bfd_vma) -1;
c434dee6 3261 if (*local_got > 0)
70256ad8 3262 {
67a4f2b7
AO		 3263 if (GOT_TLS_GDESC_P (*local_tls_type))
3264 {
6de2ae4a 3265 *local_tlsdesc_gotent = htab->elf.sgotplt->size
351f65ca 3266 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 3267 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 3268 *local_got = (bfd_vma) -2;
3269 }
3270 if (! GOT_TLS_GDESC_P (*local_tls_type)
3271 || GOT_TLS_GD_P (*local_tls_type))
3272 {
3273 *local_got = s->size;
3274 s->size += GOT_ENTRY_SIZE;
3275 if (GOT_TLS_GD_P (*local_tls_type))
3276 s->size += GOT_ENTRY_SIZE;
3277 }
bffbf940 3278 if (info->shared
67a4f2b7 3279 || GOT_TLS_GD_ANY_P (*local_tls_type)
bffbf940 3280 || *local_tls_type == GOT_TLS_IE)
67a4f2b7
AO		 3281 {
3282 if (GOT_TLS_GDESC_P (*local_tls_type))
3283 {
6de2ae4a 3284 htab->elf.srelplt->size
351f65ca 3285 += bed->s->sizeof_rela;
67a4f2b7
AO		 3286 htab->tlsdesc_plt = (bfd_vma) -1;
3287 }
3288 if (! GOT_TLS_GDESC_P (*local_tls_type)
3289 || GOT_TLS_GD_P (*local_tls_type))
351f65ca 3290 srel->size += bed->s->sizeof_rela;
67a4f2b7 3291 }
70256ad8
AJ		 3292 }
3293 else
c434dee6
AJ		 3294 *local_got = (bfd_vma) -1;
3295 }
3296 }
70256ad8 3297
bffbf940
JJ		 3298 if (htab->tls_ld_got.refcount > 0)
3299 {
3300 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3301 relocs. */
6de2ae4a
L		 3302 htab->tls_ld_got.offset = htab->elf.sgot->size;
3303 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
351f65ca 3304 htab->elf.srelgot->size += bed->s->sizeof_rela;
bffbf940
JJ		 3305 }
3306 else
3307 htab->tls_ld_got.offset = -1;
3308
c434dee6
AJ		 3309 /* Allocate global sym .plt and .got entries, and space for global
3310 sym dynamic relocs. */
351f65ca 3311 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
eb4ff4d6 3312 info);
c434dee6 3313
c25bc9fc
L		 3314 /* Allocate .plt and .got entries, and space for local symbols. */
3315 htab_traverse (htab->loc_hash_table,
351f65ca 3316 elf_x86_64_allocate_local_dynrelocs,
c25bc9fc
L		 3317 info);
3318
67a4f2b7
AO		 3319 /* For every jump slot reserved in the sgotplt, reloc_count is
3320 incremented. However, when we reserve space for TLS descriptors,
3321 it's not incremented, so in order to compute the space reserved
3322 for them, it suffices to multiply the reloc count by the jump
e1f98742
L		 3323 slot size.
3324
3325 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3326 so that R_X86_64_IRELATIVE entries come last. */
6de2ae4a 3327 if (htab->elf.srelplt)
e1f98742
L		 3328 {
3329 htab->sgotplt_jump_table_size
3330 = elf_x86_64_compute_jump_table_size (htab);
3331 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3332 }
3333 else if (htab->elf.irelplt)
3334 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
67a4f2b7
AO		 3335
3336 if (htab->tlsdesc_plt)
3337 {
3338 /* If we're not using lazy TLS relocations, don't generate the
3339 PLT and GOT entries they require. */
3340 if ((info->flags & DF_BIND_NOW))
3341 htab->tlsdesc_plt = 0;
3342 else
3343 {
6de2ae4a
L		 3344 htab->tlsdesc_got = htab->elf.sgot->size;
3345 htab->elf.sgot->size += GOT_ENTRY_SIZE;
67a4f2b7
AO		 3346 /* Reserve room for the initial entry.
3347 FIXME: we could probably do away with it in this case. */
6de2ae4a 3348 if (htab->elf.splt->size == 0)
eed180f8 3349 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
6de2ae4a 3350 htab->tlsdesc_plt = htab->elf.splt->size;
eed180f8 3351 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
67a4f2b7
AO		 3352 }
3353 }
3354
a7b16ceb
L		 3355 if (htab->elf.sgotplt)
3356 {
3357 /* Don't allocate .got.plt section if there are no GOT nor PLT
eed180f8 3358 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 3359 if ((htab->elf.hgot == NULL
3360 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 3361 && (htab->elf.sgotplt->size
3362 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 3363 && (htab->elf.splt == NULL
3364 || htab->elf.splt->size == 0)
3365 && (htab->elf.sgot == NULL
3366 || htab->elf.sgot->size == 0)
3367 && (htab->elf.iplt == NULL
3368 || htab->elf.iplt->size == 0)
3369 && (htab->elf.igotplt == NULL
3370 || htab->elf.igotplt->size == 0))
3371 htab->elf.sgotplt->size = 0;
3372 }
3373
9a2a56cc
AM		 3374 if (htab->plt_eh_frame != NULL
3375 && htab->elf.splt != NULL
3376 && htab->elf.splt->size != 0
3377 && !bfd_is_abs_section (htab->elf.splt->output_section)
3378 && _bfd_elf_eh_frame_present (info))
3379 {
3380 const struct elf_x86_64_backend_data *arch_data
f8222080 3381 = get_elf_x86_64_arch_data (bed);
9a2a56cc
AM		 3382 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
3383 }
3384
c434dee6
AJ		 3385 /* We now have determined the sizes of the various dynamic sections.
3386 Allocate memory for them. */
b34976b6 3387 relocs = FALSE;
c434dee6
AJ		 3388 for (s = dynobj->sections; s != NULL; s = s->next)
3389 {
3390 if ((s->flags & SEC_LINKER_CREATED) == 0)
3391 continue;
3392
6de2ae4a
L		 3393 if (s == htab->elf.splt
3394 || s == htab->elf.sgot
3395 || s == htab->elf.sgotplt
3396 || s == htab->elf.iplt
3397 || s == htab->elf.igotplt
0ff2b86e 3398 || s == htab->plt_bnd
dd7e64d4 3399 || s == htab->plt_got
9a2a56cc 3400 || s == htab->plt_eh_frame
75ff4589 3401 || s == htab->sdynbss)
c434dee6
AJ		 3402 {
3403 /* Strip this section if we don't need it; see the
3404 comment below. */
3405 }
0112cd26 3406 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
c434dee6 3407 {
6de2ae4a 3408 if (s->size != 0 && s != htab->elf.srelplt)
b34976b6 3409 relocs = TRUE;
c434dee6
AJ		 3410
3411 /* We use the reloc_count field as a counter if we need
3412 to copy relocs into the output file. */
6de2ae4a 3413 if (s != htab->elf.srelplt)
67a4f2b7 3414 s->reloc_count = 0;
70256ad8 3415 }
c434dee6 3416 else
70256ad8
AJ		 3417 {
3418 /* It's not one of our sections, so don't allocate space. */
3419 continue;
3420 }
3421
eea6121a 3422 if (s->size == 0)
70256ad8 3423 {
c434dee6
AJ		 3424 /* If we don't need this section, strip it from the
3425 output file. This is mostly to handle .rela.bss and
3426 .rela.plt. We must create both sections in
3427 create_dynamic_sections, because they must be created
3428 before the linker maps input sections to output
3429 sections. The linker does that before
3430 adjust_dynamic_symbol is called, and it is that
3431 function which decides whether anything needs to go
3432 into these sections. */
3433
8423293d 3434 s->flags |= SEC_EXCLUDE;
70256ad8
AJ		 3435 continue;
3436 }
3437
c456f082
AM		 3438 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3439 continue;
3440
70256ad8
AJ		 3441 /* Allocate memory for the section contents. We use bfd_zalloc
3442 here in case unused entries are not reclaimed before the
3443 section's contents are written out. This should not happen,
3444 but this way if it does, we get a R_X86_64_NONE reloc instead
3445 of garbage. */
eea6121a 3446 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
c434dee6 3447 if (s->contents == NULL)
b34976b6 3448 return FALSE;
70256ad8
AJ		 3449 }
3450
e41b3a13 3451 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 3452 && htab->plt_eh_frame->contents != NULL)
3453 {
3454 const struct elf_x86_64_backend_data *arch_data
f8222080 3455 = get_elf_x86_64_arch_data (bed);
9a2a56cc
AM		 3456
3457 memcpy (htab->plt_eh_frame->contents,
3458 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3459 bfd_put_32 (dynobj, htab->elf.splt->size,
3460 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3461 }
e41b3a13 3462
c434dee6 3463 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 3464 {
3465 /* Add some entries to the .dynamic section. We fill in the
351f65ca 3466 values later, in elf_x86_64_finish_dynamic_sections, but we
70256ad8 3467 must add the entries now so that we get the correct size for
407443a3 3468 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 3469 dynamic linker and used by the debugger. */
dc810e39 3470#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3471 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3472
36af4a4e 3473 if (info->executable)
70256ad8 3474 {
dc810e39 3475 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3476 return FALSE;
70256ad8
AJ		 3477 }
3478
6de2ae4a 3479 if (htab->elf.splt->size != 0)
70256ad8 3480 {
7c1e8d3e
L		 3481 /* DT_PLTGOT is used by prelink even if there is no PLT
3482 relocation. */
3483 if (!add_dynamic_entry (DT_PLTGOT, 0))
b34976b6 3484 return FALSE;
67a4f2b7 3485
7c1e8d3e
L		 3486 if (htab->elf.srelplt->size != 0)
3487 {
3488 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3489 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3490 || !add_dynamic_entry (DT_JMPREL, 0))
3491 return FALSE;
3492 }
3493
67a4f2b7
AO		 3494 if (htab->tlsdesc_plt
3495 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3496 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3497 return FALSE;
70256ad8
AJ		 3498 }
3499
3500 if (relocs)
3501 {
dc810e39
AM		 3502 if (!add_dynamic_entry (DT_RELA, 0)
3503 || !add_dynamic_entry (DT_RELASZ, 0)
351f65ca 3504 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
b34976b6 3505 return FALSE;
70256ad8 3506
c434dee6
AJ		 3507 /* If any dynamic relocs apply to a read-only section,
3508 then we need a DT_TEXTREL entry. */
3509 if ((info->flags & DF_TEXTREL) == 0)
eed180f8 3510 elf_link_hash_traverse (&htab->elf,
351f65ca 3511 elf_x86_64_readonly_dynrelocs,
eb4ff4d6 3512 info);
c434dee6
AJ		 3513
3514 if ((info->flags & DF_TEXTREL) != 0)
3515 {
3516 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3517 return FALSE;
c434dee6 3518 }
70256ad8
AJ		 3519 }
3520 }
dc810e39 3521#undef add_dynamic_entry
70256ad8 3522
b34976b6 3523 return TRUE;
70256ad8
AJ		 3524}
3525
67a4f2b7 3526static bfd_boolean
351f65ca
L		 3527elf_x86_64_always_size_sections (bfd *output_bfd,
3528 struct bfd_link_info *info)
67a4f2b7
AO		 3529{
3530 asection *tls_sec = elf_hash_table (info)->tls_sec;
3531
3532 if (tls_sec)
3533 {
3534 struct elf_link_hash_entry *tlsbase;
3535
3536 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3537 "_TLS_MODULE_BASE_",
3538 FALSE, FALSE, FALSE);
3539
3540 if (tlsbase && tlsbase->type == STT_TLS)
3541 {
351f65ca 3542 struct elf_x86_64_link_hash_table *htab;
67a4f2b7
AO		 3543 struct bfd_link_hash_entry *bh = NULL;
3544 const struct elf_backend_data *bed
3545 = get_elf_backend_data (output_bfd);
3546
351f65ca 3547 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3548 if (htab == NULL)
3549 return FALSE;
3550
67a4f2b7
AO		 3551 if (!(_bfd_generic_link_add_one_symbol
3552 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3553 tls_sec, 0, NULL, FALSE,
3554 bed->collect, &bh)))
3555 return FALSE;
9f03412a 3556
4dfe6ac6 3557 htab->tls_module_base = bh;
9f03412a 3558
67a4f2b7
AO		 3559 tlsbase = (struct elf_link_hash_entry *)bh;
3560 tlsbase->def_regular = 1;
3561 tlsbase->other = STV_HIDDEN;
576fa883 3562 tlsbase->root.linker_def = 1;
67a4f2b7
AO		 3563 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3564 }
3565 }
3566
3567 return TRUE;
3568}
3569
9f03412a
AO		 3570/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3571 executables. Rather than setting it to the beginning of the TLS
3572 section, we have to set it to the end. This function may be called
3573 multiple times, it is idempotent. */
3574
3575static void
351f65ca 3576elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3577{
351f65ca 3578 struct elf_x86_64_link_hash_table *htab;
9f03412a
AO		 3579 struct bfd_link_hash_entry *base;
3580
3581 if (!info->executable)
3582 return;
3583
351f65ca 3584 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3585 if (htab == NULL)
3586 return;
9f03412a 3587
4dfe6ac6
NC		 3588 base = htab->tls_module_base;
3589 if (base == NULL)
9f03412a
AO		 3590 return;
3591
4dfe6ac6 3592 base->u.def.value = htab->elf.tls_size;
9f03412a
AO		 3593}
3594
bffbf940
JJ		 3595/* Return the base VMA address which should be subtracted from real addresses
3596 when resolving @dtpoff relocation.
3597 This is PT_TLS segment p_vaddr. */
3598
3599static bfd_vma
351f65ca 3600elf_x86_64_dtpoff_base (struct bfd_link_info *info)
bffbf940 3601{
e1918d23
AM		 3602 /* If tls_sec is NULL, we should have signalled an error already. */
3603 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 3604 return 0;
e1918d23 3605 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ		 3606}
3607
3608/* Return the relocation value for @tpoff relocation
3609 if STT_TLS virtual address is ADDRESS. */
3610
3611static bfd_vma
351f65ca 3612elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 3613{
e1918d23 3614 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3615 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3616 bfd_vma static_tls_size;
bffbf940
JJ		 3617
3618 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 3619 if (htab->tls_sec == NULL)
bffbf940 3620 return 0;
7dc98aea
RO		 3621
3622 /* Consider special static TLS alignment requirements. */
3623 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3624 return address - static_tls_size - htab->tls_sec->vma;
bffbf940
JJ		 3625}
3626
90f487df
L		 3627/* Is the instruction before OFFSET in CONTENTS a 32bit relative
3628 branch? */
3629
3630static bfd_boolean
3631is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3632{
3633 /* Opcode Instruction
3634 0xe8 call
3635 0xe9 jump
3636 0x0f 0x8x conditional jump */
3637 return ((offset > 0
3638 && (contents [offset - 1] == 0xe8
3639 || contents [offset - 1] == 0xe9))
3640 || (offset > 1
3641 && contents [offset - 2] == 0x0f
3642 && (contents [offset - 1] & 0xf0) == 0x80));
3643}
3644
8d88c4ca
NC		 3645/* Relocate an x86_64 ELF section. */
3646
b34976b6 3647static bfd_boolean
351f65ca
L		 3648elf_x86_64_relocate_section (bfd *output_bfd,
3649 struct bfd_link_info *info,
3650 bfd *input_bfd,
3651 asection *input_section,
3652 bfd_byte *contents,
3653 Elf_Internal_Rela *relocs,
3654 Elf_Internal_Sym *local_syms,
3655 asection **local_sections)
8d88c4ca 3656{
351f65ca 3657 struct elf_x86_64_link_hash_table *htab;
8d88c4ca
NC		 3658 Elf_Internal_Shdr *symtab_hdr;
3659 struct elf_link_hash_entry **sym_hashes;
3660 bfd_vma *local_got_offsets;
67a4f2b7 3661 bfd_vma *local_tlsdesc_gotents;
c434dee6 3662 Elf_Internal_Rela *rel;
8d88c4ca 3663 Elf_Internal_Rela *relend;
eed180f8 3664 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
8d88c4ca 3665
0ffa91dd
NC		 3666 BFD_ASSERT (is_x86_64_elf (input_bfd));
3667
351f65ca 3668 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3669 if (htab == NULL)
3670 return FALSE;
0ffa91dd 3671 symtab_hdr = &elf_symtab_hdr (input_bfd);
8d88c4ca
NC		 3672 sym_hashes = elf_sym_hashes (input_bfd);
3673 local_got_offsets = elf_local_got_offsets (input_bfd);
351f65ca 3674 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
8d88c4ca 3675
351f65ca 3676 elf_x86_64_set_tls_module_base (info);
9f03412a 3677
c434dee6 3678 rel = relocs;
8d88c4ca 3679 relend = relocs + input_section->reloc_count;
c434dee6 3680 for (; rel < relend; rel++)
8d88c4ca 3681 {
bffbf940 3682 unsigned int r_type;
8d88c4ca
NC		 3683 reloc_howto_type *howto;
3684 unsigned long r_symndx;
3685 struct elf_link_hash_entry *h;
0ff2b86e 3686 struct elf_x86_64_link_hash_entry *eh;
8d88c4ca
NC		 3687 Elf_Internal_Sym *sym;
3688 asection *sec;
0ff2b86e 3689 bfd_vma off, offplt, plt_offset;
8d88c4ca 3690 bfd_vma relocation;
b34976b6 3691 bfd_boolean unresolved_reloc;
8d88c4ca 3692 bfd_reloc_status_type r;
bffbf940 3693 int tls_type;
0ff2b86e 3694 asection *base_got, *resolved_plt;
1788fc08 3695 bfd_vma st_size;
8d88c4ca 3696
351f65ca 3697 r_type = ELF32_R_TYPE (rel->r_info);
fe4770f4
AJ		 3698 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3699 || r_type == (int) R_X86_64_GNU_VTENTRY)
3700 continue;
8d88c4ca 3701
9911c0fc 3702 if (r_type >= (int) R_X86_64_standard)
8da6118f 3703 {
9911c0fc
L		 3704 (*_bfd_error_handler)
3705 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3706 input_bfd, input_section, r_type);
8da6118f 3707 bfd_set_error (bfd_error_bad_value);
b34976b6 3708 return FALSE;
8da6118f 3709 }
8d88c4ca 3710
d7921315 3711 if (r_type != (int) R_X86_64_32
eed180f8 3712 || ABI_64_P (output_bfd))
d7921315
L		 3713 howto = x86_64_elf_howto_table + r_type;
3714 else
3715 howto = (x86_64_elf_howto_table
3716 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
351f65ca 3717 r_symndx = htab->r_sym (rel->r_info);
8d88c4ca
NC		 3718 h = NULL;
3719 sym = NULL;
3720 sec = NULL;
b34976b6 3721 unresolved_reloc = FALSE;
8d88c4ca 3722 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH		 3723 {
3724 sym = local_syms + r_symndx;
3725 sec = local_sections[r_symndx];
c434dee6 3726
c25bc9fc
L		 3727 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3728 &sec, rel);
1788fc08 3729 st_size = sym->st_size;
c25bc9fc
L		 3730
3731 /* Relocate against local STT_GNU_IFUNC symbol. */
1f85278f 3732 if (!info->relocatable
351f65ca 3733 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc 3734 {
351f65ca
L		 3735 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3736 rel, FALSE);
c25bc9fc
L		 3737 if (h == NULL)
3738 abort ();
3739
eed180f8 3740 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3741 h->root.u.def.value = sym->st_value;
3742 h->root.u.def.section = sec;
3743 }
8da6118f 3744 }
8d88c4ca 3745 else
8da6118f 3746 {
c9736ba0 3747 bfd_boolean warned ATTRIBUTE_UNUSED;
62d887d4 3748 bfd_boolean ignored ATTRIBUTE_UNUSED;
c434dee6 3749
b2a8e766
AM		 3750 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3751 r_symndx, symtab_hdr, sym_hashes,
3752 h, sec, relocation,
62d887d4 3753 unresolved_reloc, warned, ignored);
1788fc08 3754 st_size = h->size;
8da6118f 3755 }
ab96bf03 3756
dbaa2011 3757 if (sec != NULL && discarded_section (sec))
0672748a 3758 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 3759 rel, 1, relend, howto, 0, contents);
ab96bf03
AM		 3760
3761 if (info->relocatable)
3762 continue;
3763
1788fc08 3764 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
64d25c44 3765 {
1788fc08
L		 3766 if (r_type == R_X86_64_64)
3767 {
3768 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3769 zero-extend it to 64bit if addend is zero. */
3770 r_type = R_X86_64_32;
3771 memset (contents + rel->r_offset + 4, 0, 4);
3772 }
3773 else if (r_type == R_X86_64_SIZE64)
3774 {
3775 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3776 zero-extend it to 64bit if addend is zero. */
3777 r_type = R_X86_64_SIZE32;
3778 memset (contents + rel->r_offset + 4, 0, 4);
3779 }
64d25c44
L		 3780 }
3781
0ff2b86e
L		 3782 eh = (struct elf_x86_64_link_hash_entry *) h;
3783
cbe950e9
L		 3784 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3785 it here if it is defined in a non-shared object. */
3786 if (h != NULL
3787 && h->type == STT_GNU_IFUNC
3788 && h->def_regular)
3789 {
cbe950e9 3790 bfd_vma plt_index;
4c544807 3791 const char *name;
cbe950e9 3792
97dc35c8
L		 3793 if ((input_section->flags & SEC_ALLOC) == 0)
3794 {
3795 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3796 sections because such sections are not SEC_ALLOC and
3797 thus ld.so will not process them. */
3798 if ((input_section->flags & SEC_DEBUGGING) != 0)
0eace210 3799 continue;
97dc35c8
L		 3800 abort ();
3801 }
3802 else if (h->plt.offset == (bfd_vma) -1)
cbe950e9
L		 3803 abort ();
3804
3805 /* STT_GNU_IFUNC symbol must go through PLT. */
0ff2b86e
L		 3806 if (htab->elf.splt != NULL)
3807 {
3808 if (htab->plt_bnd != NULL)
3809 {
3810 resolved_plt = htab->plt_bnd;
3811 plt_offset = eh->plt_bnd.offset;
3812 }
3813 else
3814 {
3815 resolved_plt = htab->elf.splt;
3816 plt_offset = h->plt.offset;
3817 }
3818 }
3819 else
3820 {
3821 resolved_plt = htab->elf.iplt;
3822 plt_offset = h->plt.offset;
3823 }
3824
3825 relocation = (resolved_plt->output_section->vma
3826 + resolved_plt->output_offset + plt_offset);
cbe950e9
L		 3827
3828 switch (r_type)
3829 {
3830 default:
4c544807
L		 3831 if (h->root.root.string)
3832 name = h->root.root.string;
3833 else
3834 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3835 NULL);
cbe950e9
L		 3836 (*_bfd_error_handler)
3837 (_("%B: relocation %s against STT_GNU_IFUNC "
3838 "symbol `%s' isn't handled by %s"), input_bfd,
3839 x86_64_elf_howto_table[r_type].name,
4c544807 3840 name, __FUNCTION__);
cbe950e9
L		 3841 bfd_set_error (bfd_error_bad_value);
3842 return FALSE;
3843
3844 case R_X86_64_32S:
710ab287 3845 if (info->shared)
cbe950e9 3846 abort ();
710ab287
L		 3847 goto do_relocation;
3848
248775ba
L		 3849 case R_X86_64_32:
3850 if (ABI_64_P (output_bfd))
3851 goto do_relocation;
17672001 3852 /* FALLTHROUGH */
eed180f8 3853 case R_X86_64_64:
710ab287
L		 3854 if (rel->r_addend != 0)
3855 {
4c544807
L		 3856 if (h->root.root.string)
3857 name = h->root.root.string;
3858 else
3859 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3860 sym, NULL);
710ab287
L		 3861 (*_bfd_error_handler)
3862 (_("%B: relocation %s against STT_GNU_IFUNC "
3863 "symbol `%s' has non-zero addend: %d"),
3864 input_bfd, x86_64_elf_howto_table[r_type].name,
4c544807 3865 name, rel->r_addend);
710ab287
L		 3866 bfd_set_error (bfd_error_bad_value);
3867 return FALSE;
3868 }
3869
3870 /* Generate dynamic relcoation only when there is a
c293fa49 3871 non-GOT reference in a shared object. */
710ab287
L		 3872 if (info->shared && h->non_got_ref)
3873 {
3874 Elf_Internal_Rela outrel;
710ab287
L		 3875 asection *sreloc;
3876
c25bc9fc
L		 3877 /* Need a dynamic relocation to get the real function
3878 address. */
710ab287
L		 3879 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3880 info,
3881 input_section,
3882 rel->r_offset);
3883 if (outrel.r_offset == (bfd_vma) -1
3884 || outrel.r_offset == (bfd_vma) -2)
3885 abort ();
3886
3887 outrel.r_offset += (input_section->output_section->vma
3888 + input_section->output_offset);
3889
3890 if (h->dynindx == -1
44c4ea11
L		 3891 || h->forced_local
3892 || info->executable)
710ab287
L		 3893 {
3894 /* This symbol is resolved locally. */
56b8aada
L		 3895 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3896 outrel.r_addend = (h->root.u.def.value
3897 + h->root.u.def.section->output_section->vma
3898 + h->root.u.def.section->output_offset);
710ab287
L		 3899 }
3900 else
3901 {
351f65ca 3902 outrel.r_info = htab->r_info (h->dynindx, r_type);
710ab287
L		 3903 outrel.r_addend = 0;
3904 }
3905
6de2ae4a 3906 sreloc = htab->elf.irelifunc;
351f65ca 3907 elf_append_rela (output_bfd, sreloc, &outrel);
710ab287
L		 3908
3909 /* If this reloc is against an external symbol, we
3910 do not want to fiddle with the addend. Otherwise,
3911 we need to include the symbol value so that it
3912 becomes an addend for the dynamic reloc. For an
3913 internal symbol, we have updated addend. */
56b8aada 3914 continue;
710ab287 3915 }
17672001 3916 /* FALLTHROUGH */
cbe950e9 3917 case R_X86_64_PC32:
c3320543 3918 case R_X86_64_PC32_BND:
cbe950e9
L		 3919 case R_X86_64_PC64:
3920 case R_X86_64_PLT32:
c3320543 3921 case R_X86_64_PLT32_BND:
cbe950e9
L		 3922 goto do_relocation;
3923
3924 case R_X86_64_GOTPCREL:
3925 case R_X86_64_GOTPCREL64:
6de2ae4a 3926 base_got = htab->elf.sgot;
cbe950e9
L		 3927 off = h->got.offset;
3928
7afd84dc 3929 if (base_got == NULL)
cbe950e9
L		 3930 abort ();
3931
7afd84dc 3932 if (off == (bfd_vma) -1)
cbe950e9 3933 {
7afd84dc
L		 3934 /* We can't use h->got.offset here to save state, or
3935 even just remember the offset, as finish_dynamic_symbol
3936 would use that as offset into .got. */
cbe950e9 3937
6de2ae4a 3938 if (htab->elf.splt != NULL)
7afd84dc 3939 {
eed180f8 3940 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 3941 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3942 base_got = htab->elf.sgotplt;
7afd84dc 3943 }
cbe950e9
L		 3944 else
3945 {
eed180f8 3946 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3947 off = plt_index * GOT_ENTRY_SIZE;
6de2ae4a 3948 base_got = htab->elf.igotplt;
7afd84dc
L		 3949 }
3950
3951 if (h->dynindx == -1
3952 || h->forced_local
3953 || info->symbolic)
3954 {
eed180f8 3955 /* This references the local defitionion. We must
7afd84dc 3956 initialize this entry in the global offset table.
eed180f8 3957 Since the offset must always be a multiple of 8,
7afd84dc
L		 3958 we use the least significant bit to record
3959 whether we have initialized it already.
3960
3961 When doing a dynamic link, we create a .rela.got
3962 relocation entry to initialize the value. This
3963 is done in the finish_dynamic_symbol routine. */
3964 if ((off & 1) != 0)
3965 off &= ~1;
3966 else
3967 {
3968 bfd_put_64 (output_bfd, relocation,
3969 base_got->contents + off);
3970 /* Note that this is harmless for the GOTPLT64
3971 case, as -1 | 1 still is -1. */
3972 h->got.offset |= 1;
3973 }
cbe950e9
L		 3974 }
3975 }
3976
3977 relocation = (base_got->output_section->vma
3978 + base_got->output_offset + off);
3979
cbe950e9
L		 3980 goto do_relocation;
3981 }
3982 }
3983
70256ad8
AJ		 3984 /* When generating a shared object, the relocations handled here are
3985 copied into the output file to be resolved at run time. */
3986 switch (r_type)
3987 {
3988 case R_X86_64_GOT32:
7b81dfbb 3989 case R_X86_64_GOT64:
70256ad8
AJ		 3990 /* Relocation is to the entry for this symbol in the global
3991 offset table. */
70256ad8 3992 case R_X86_64_GOTPCREL:
7b81dfbb
AJ		 3993 case R_X86_64_GOTPCREL64:
3994 /* Use global offset table entry as symbol value. */
3995 case R_X86_64_GOTPLT64:
553d1284 3996 /* This is obsolete and treated the the same as GOT64. */
6de2ae4a 3997 base_got = htab->elf.sgot;
7b81dfbb 3998
6de2ae4a 3999 if (htab->elf.sgot == NULL)
c434dee6 4000 abort ();
053579d7 4001
51e0a107 4002 if (h != NULL)
70256ad8 4003 {
b34976b6 4004 bfd_boolean dyn;
c434dee6
AJ		 4005
4006 off = h->got.offset;
7b81dfbb 4007 if (h->needs_plt
eed180f8 4008 && h->plt.offset != (bfd_vma)-1
7b81dfbb
AJ		 4009 && off == (bfd_vma)-1)
4010 {
4011 /* We can't use h->got.offset here to save
4012 state, or even just remember the offset, as
4013 finish_dynamic_symbol would use that as offset into
4014 .got. */
eed180f8 4015 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
7b81dfbb 4016 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 4017 base_got = htab->elf.sgotplt;
7b81dfbb
AJ		 4018 }
4019
c434dee6 4020 dyn = htab->elf.dynamic_sections_created;
51e0a107 4021
27482721 4022 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
51e0a107 4023 || (info->shared
27482721 4024 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ		 4025 || (ELF_ST_VISIBILITY (h->other)
4026 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH		 4027 {
4028 /* This is actually a static link, or it is a -Bsymbolic
4029 link and the symbol is defined locally, or the symbol
407443a3 4030 was forced to be local because of a version file. We
51e0a107
JH		 4031 must initialize this entry in the global offset table.
4032 Since the offset must always be a multiple of 8, we
4033 use the least significant bit to record whether we
4034 have initialized it already.
4035
4036 When doing a dynamic link, we create a .rela.got
407443a3
AJ		 4037 relocation entry to initialize the value. This is
4038 done in the finish_dynamic_symbol routine. */
51e0a107
JH		 4039 if ((off & 1) != 0)
4040 off &= ~1;
4041 else
4042 {
4043 bfd_put_64 (output_bfd, relocation,
7b81dfbb
AJ		 4044 base_got->contents + off);
4045 /* Note that this is harmless for the GOTPLT64 case,
eed180f8 4046 as -1 | 1 still is -1. */
51e0a107
JH		 4047 h->got.offset |= 1;
4048 }
4049 }
053579d7 4050 else
b34976b6 4051 unresolved_reloc = FALSE;
70256ad8 4052 }
51e0a107
JH		 4053 else
4054 {
c434dee6
AJ		 4055 if (local_got_offsets == NULL)
4056 abort ();
51e0a107
JH		 4057
4058 off = local_got_offsets[r_symndx];
4059
4060 /* The offset must always be a multiple of 8. We use
407443a3
AJ		 4061 the least significant bit to record whether we have
4062 already generated the necessary reloc. */
51e0a107
JH		 4063 if ((off & 1) != 0)
4064 off &= ~1;
4065 else
4066 {
c434dee6 4067 bfd_put_64 (output_bfd, relocation,
7b81dfbb 4068 base_got->contents + off);
51e0a107
JH		 4069
4070 if (info->shared)
4071 {
947216bf 4072 asection *s;
51e0a107 4073 Elf_Internal_Rela outrel;
70256ad8 4074
51e0a107
JH		 4075 /* We need to generate a R_X86_64_RELATIVE reloc
4076 for the dynamic linker. */
6de2ae4a 4077 s = htab->elf.srelgot;
947216bf 4078 if (s == NULL)
c434dee6 4079 abort ();
51e0a107 4080
7b81dfbb
AJ		 4081 outrel.r_offset = (base_got->output_section->vma
4082 + base_got->output_offset
51e0a107 4083 + off);
351f65ca 4084 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
51e0a107 4085 outrel.r_addend = relocation;
351f65ca 4086 elf_append_rela (output_bfd, s, &outrel);
51e0a107
JH		 4087 }
4088
4089 local_got_offsets[r_symndx] |= 1;
4090 }
51e0a107 4091 }
6a2bda3f 4092
c434dee6
AJ		 4093 if (off >= (bfd_vma) -2)
4094 abort ();
4095
7b81dfbb
AJ		 4096 relocation = base_got->output_section->vma
4097 + base_got->output_offset + off;
4098 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
6de2ae4a
L		 4099 relocation -= htab->elf.sgotplt->output_section->vma
4100 - htab->elf.sgotplt->output_offset;
c434dee6 4101
70256ad8
AJ		 4102 break;
4103
d6ab8113
JB		 4104 case R_X86_64_GOTOFF64:
4105 /* Relocation is relative to the start of the global offset
4106 table. */
4107
3d949995
L		 4108 /* Check to make sure it isn't a protected function or data
4109 symbol for shared library since it may not be local when
e3c0e327
L		 4110 used as function address or with copy relocation. We also
4111 need to make sure that a symbol is referenced locally. */
4112 if (info->shared && h)
d6ab8113 4113 {
e3c0e327
L		 4114 if (!h->def_regular)
4115 {
4116 const char *v;
4117
4118 switch (ELF_ST_VISIBILITY (h->other))
4119 {
4120 case STV_HIDDEN:
4121 v = _("hidden symbol");
4122 break;
4123 case STV_INTERNAL:
4124 v = _("internal symbol");
4125 break;
4126 case STV_PROTECTED:
4127 v = _("protected symbol");
4128 break;
4129 default:
4130 v = _("symbol");
4131 break;
4132 }
4133
4134 (*_bfd_error_handler)
4135 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
4136 input_bfd, v, h->root.root.string);
4137 bfd_set_error (bfd_error_bad_value);
4138 return FALSE;
4139 }
4140 else if (!info->executable
4141 && !SYMBOL_REFERENCES_LOCAL (info, h)
4142 && (h->type == STT_FUNC
4143 || h->type == STT_OBJECT)
4144 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4145 {
4146 (*_bfd_error_handler)
4147 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
4148 input_bfd,
4149 h->type == STT_FUNC ? "function" : "data",
4150 h->root.root.string);
4151 bfd_set_error (bfd_error_bad_value);
d6ab8113 4152 return FALSE;
e3c0e327 4153 }
d6ab8113
JB		 4154 }
4155
4156 /* Note that sgot is not involved in this
4157 calculation. We always want the start of .got.plt. If we
4158 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4159 permitted by the ABI, we might have to change this
4160 calculation. */
6de2ae4a
L		 4161 relocation -= htab->elf.sgotplt->output_section->vma
4162 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 4163 break;
4164
4165 case R_X86_64_GOTPC32:
7b81dfbb 4166 case R_X86_64_GOTPC64:
d6ab8113 4167 /* Use global offset table as symbol value. */
6de2ae4a
L		 4168 relocation = htab->elf.sgotplt->output_section->vma
4169 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 4170 unresolved_reloc = FALSE;
4171 break;
7b81dfbb
AJ		 4172
4173 case R_X86_64_PLTOFF64:
4174 /* Relocation is PLT entry relative to GOT. For local
4175 symbols it's the symbol itself relative to GOT. */
eed180f8 4176 if (h != NULL
7b81dfbb
AJ		 4177 /* See PLT32 handling. */
4178 && h->plt.offset != (bfd_vma) -1
6de2ae4a 4179 && htab->elf.splt != NULL)
7b81dfbb 4180 {
0ff2b86e
L		 4181 if (htab->plt_bnd != NULL)
4182 {
4183 resolved_plt = htab->plt_bnd;
4184 plt_offset = eh->plt_bnd.offset;
4185 }
4186 else
4187 {
4188 resolved_plt = htab->elf.splt;
4189 plt_offset = h->plt.offset;
4190 }
4191
4192 relocation = (resolved_plt->output_section->vma
4193 + resolved_plt->output_offset
4194 + plt_offset);
7b81dfbb
AJ		 4195 unresolved_reloc = FALSE;
4196 }
4197
6de2ae4a
L		 4198 relocation -= htab->elf.sgotplt->output_section->vma
4199 + htab->elf.sgotplt->output_offset;
7b81dfbb 4200 break;
d6ab8113 4201
70256ad8 4202 case R_X86_64_PLT32:
c3320543 4203 case R_X86_64_PLT32_BND:
70256ad8
AJ		 4204 /* Relocation is to the entry for this symbol in the
4205 procedure linkage table. */
4206
4207 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 4208 without using the procedure linkage table. */
70256ad8
AJ		 4209 if (h == NULL)
4210 break;
4211
dd7e64d4
L		 4212 if ((h->plt.offset == (bfd_vma) -1
4213 && eh->plt_got.offset == (bfd_vma) -1)
6de2ae4a 4214 || htab->elf.splt == NULL)
70256ad8
AJ		 4215 {
4216 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ		 4217 happens when statically linking PIC code, or when
4218 using -Bsymbolic. */
70256ad8
AJ		 4219 break;
4220 }
4221
dd7e64d4 4222 if (h->plt.offset != (bfd_vma) -1)
0ff2b86e 4223 {
dd7e64d4
L		 4224 if (htab->plt_bnd != NULL)
4225 {
4226 resolved_plt = htab->plt_bnd;
4227 plt_offset = eh->plt_bnd.offset;
4228 }
4229 else
4230 {
4231 resolved_plt = htab->elf.splt;
4232 plt_offset = h->plt.offset;
4233 }
0ff2b86e
L		 4234 }
4235 else
4236 {
dd7e64d4
L		 4237 /* Use the GOT PLT. */
4238 resolved_plt = htab->plt_got;
4239 plt_offset = eh->plt_got.offset;
0ff2b86e
L		 4240 }
4241
4242 relocation = (resolved_plt->output_section->vma
4243 + resolved_plt->output_offset
4244 + plt_offset);
b34976b6 4245 unresolved_reloc = FALSE;
70256ad8
AJ		 4246 break;
4247
1788fc08
L		 4248 case R_X86_64_SIZE32:
4249 case R_X86_64_SIZE64:
1788fc08
L		 4250 /* Set to symbol size. */
4251 relocation = st_size;
4252 goto direct;
4253
fd8ab9e5
AJ		 4254 case R_X86_64_PC8:
4255 case R_X86_64_PC16:
4256 case R_X86_64_PC32:
c3320543 4257 case R_X86_64_PC32_BND:
6333bc0d
L		 4258 /* Don't complain about -fPIC if the symbol is undefined when
4259 building executable. */
6610a52d 4260 if (info->shared
ba3bee0b 4261 && (input_section->flags & SEC_ALLOC) != 0
90f487df 4262 && (input_section->flags & SEC_READONLY) != 0
6333bc0d
L		 4263 && h != NULL
4264 && !(info->executable
4265 && h->root.type == bfd_link_hash_undefined))
6610a52d 4266 {
41bed6dd
L		 4267 bfd_boolean fail = FALSE;
4268 bfd_boolean branch
c3320543
L		 4269 = ((r_type == R_X86_64_PC32
4270 || r_type == R_X86_64_PC32_BND)
41bed6dd
L		 4271 && is_32bit_relative_branch (contents, rel->r_offset));
4272
4273 if (SYMBOL_REFERENCES_LOCAL (info, h))
4274 {
4275 /* Symbol is referenced locally. Make sure it is
4276 defined locally or for a branch. */
4277 fail = !h->def_regular && !branch;
4278 }
bc696fd5
L		 4279 else if (!(info->executable
4280 && (h->needs_copy || eh->needs_copy)))
41bed6dd 4281 {
9a926d55
L		 4282 /* Symbol doesn't need copy reloc and isn't referenced
4283 locally. We only allow branch to symbol with
4284 non-default visibility. */
41bed6dd
L		 4285 fail = (!branch
4286 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
4287 }
4288
4289 if (fail)
4290 {
4291 const char *fmt;
4292 const char *v;
4293 const char *pic = "";
4294
4295 switch (ELF_ST_VISIBILITY (h->other))
4296 {
4297 case STV_HIDDEN:
4298 v = _("hidden symbol");
4299 break;
4300 case STV_INTERNAL:
4301 v = _("internal symbol");
4302 break;
4303 case STV_PROTECTED:
4304 v = _("protected symbol");
4305 break;
4306 default:
4307 v = _("symbol");
4308 pic = _("; recompile with -fPIC");
4309 break;
4310 }
4311
4312 if (h->def_regular)
4313 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4314 else
4315 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4316
4317 (*_bfd_error_handler) (fmt, input_bfd,
4318 x86_64_elf_howto_table[r_type].name,
4319 v, h->root.root.string, pic);
4320 bfd_set_error (bfd_error_bad_value);
4321 return FALSE;
4322 }
6610a52d
L		 4323 }
4324 /* Fall through. */
4325
70256ad8
AJ		 4326 case R_X86_64_8:
4327 case R_X86_64_16:
4328 case R_X86_64_32:
d6ab8113 4329 case R_X86_64_PC64:
6b3db546 4330 case R_X86_64_64:
80643fbc 4331 /* FIXME: The ABI says the linker should make sure the value is
407443a3 4332 the same when it's zeroextended to 64 bit. */
c434dee6 4333
1788fc08 4334direct:
b1e24c02 4335 if ((input_section->flags & SEC_ALLOC) == 0)
c434dee6
AJ		 4336 break;
4337
9a926d55 4338 /* Don't copy a pc-relative relocation into the output file
6333bc0d
L		 4339 if the symbol needs copy reloc or the symbol is undefined
4340 when building executable. */
c434dee6 4341 if ((info->shared
fd9edc90
L		 4342 && !(info->executable
4343 && h != NULL
6333bc0d
L		 4344 && (h->needs_copy
4345 || eh->needs_copy
4346 || h->root.type == bfd_link_hash_undefined)
9a926d55 4347 && IS_X86_64_PCREL_TYPE (r_type))
4bc6e03a
AJ		 4348 && (h == NULL
4349 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4350 || h->root.type != bfd_link_hash_undefweak)
1788fc08
L		 4351 && ((! IS_X86_64_PCREL_TYPE (r_type)
4352 && r_type != R_X86_64_SIZE32
4353 && r_type != R_X86_64_SIZE64)
d8045f23 4354 || ! SYMBOL_CALLS_LOCAL (info, h)))
d40d037c
AJ		 4355 || (ELIMINATE_COPY_RELOCS
4356 && !info->shared
c434dee6
AJ		 4357 && h != NULL
4358 && h->dynindx != -1
f5385ebf
AM		 4359 && !h->non_got_ref
4360 && ((h->def_dynamic
4361 && !h->def_regular)
c434dee6 4362 || h->root.type == bfd_link_hash_undefweak
0f88be7a 4363 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ		 4364 {
4365 Elf_Internal_Rela outrel;
b34976b6 4366 bfd_boolean skip, relocate;
c434dee6 4367 asection *sreloc;
70256ad8
AJ		 4368
4369 /* When generating a shared object, these relocations
4370 are copied into the output file to be resolved at run
407443a3 4371 time. */
b34976b6
AM		 4372 skip = FALSE;
4373 relocate = FALSE;
70256ad8 4374
c629eae0
JJ		 4375 outrel.r_offset =
4376 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 4377 rel->r_offset);
c629eae0 4378 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 4379 skip = TRUE;
0fb19cbc 4380 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 4381 skip = TRUE, relocate = TRUE;
70256ad8
AJ		 4382
4383 outrel.r_offset += (input_section->output_section->vma
4384 + input_section->output_offset);
4385
4386 if (skip)
0bb2d96a 4387 memset (&outrel, 0, sizeof outrel);
c434dee6 4388
fd8ab9e5
AJ		 4389 /* h->dynindx may be -1 if this symbol was marked to
4390 become local. */
4391 else if (h != NULL
c434dee6 4392 && h->dynindx != -1
d8045f23
NC		 4393 && (IS_X86_64_PCREL_TYPE (r_type)
4394 || ! info->shared
4395 || ! SYMBOLIC_BIND (info, h)
4396 || ! h->def_regular))
70256ad8 4397 {
351f65ca 4398 outrel.r_info = htab->r_info (h->dynindx, r_type);
c434dee6 4399 outrel.r_addend = rel->r_addend;
70256ad8
AJ		 4400 }
4401 else
4402 {
c434dee6 4403 /* This symbol is local, or marked to become local. */
248775ba 4404 if (r_type == htab->pointer_r_type)
607c0e09 4405 {
b34976b6 4406 relocate = TRUE;
351f65ca 4407 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
607c0e09
AS		 4408 outrel.r_addend = relocation + rel->r_addend;
4409 }
64d25c44
L		 4410 else if (r_type == R_X86_64_64
4411 && !ABI_64_P (output_bfd))
4412 {
4413 relocate = TRUE;
4414 outrel.r_info = htab->r_info (0,
4415 R_X86_64_RELATIVE64);
4416 outrel.r_addend = relocation + rel->r_addend;
8cf0d2dd
L		 4417 /* Check addend overflow. */
4418 if ((outrel.r_addend & 0x80000000)
4419 != (rel->r_addend & 0x80000000))
4420 {
4421 const char *name;
268a8d3a 4422 int addend = rel->r_addend;
8cf0d2dd
L		 4423 if (h && h->root.root.string)
4424 name = h->root.root.string;
4425 else
4426 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4427 sym, NULL);
6f2c9068
L		 4428 if (addend < 0)
4429 (*_bfd_error_handler)
268a8d3a 4430 (_("%B: addend -0x%x in relocation %s against "
6f2c9068
L		 4431 "symbol `%s' at 0x%lx in section `%A' is "
4432 "out of range"),
4433 input_bfd, input_section, addend,
4434 x86_64_elf_howto_table[r_type].name,
4435 name, (unsigned long) rel->r_offset);
4436 else
4437 (*_bfd_error_handler)
268a8d3a 4438 (_("%B: addend 0x%x in relocation %s against "
6f2c9068
L		 4439 "symbol `%s' at 0x%lx in section `%A' is "
4440 "out of range"),
4441 input_bfd, input_section, addend,
4442 x86_64_elf_howto_table[r_type].name,
4443 name, (unsigned long) rel->r_offset);
8cf0d2dd
L		 4444 bfd_set_error (bfd_error_bad_value);
4445 return FALSE;
4446 }
64d25c44 4447 }
607c0e09
AS		 4448 else
4449 {
4450 long sindx;
4451
8517fae7 4452 if (bfd_is_abs_section (sec))
607c0e09
AS		 4453 sindx = 0;
4454 else if (sec == NULL || sec->owner == NULL)
4455 {
4456 bfd_set_error (bfd_error_bad_value);
b34976b6 4457 return FALSE;
607c0e09
AS		 4458 }
4459 else
4460 {
4461 asection *osec;
4462
74541ad4
AM		 4463 /* We are turning this relocation into one
4464 against a section symbol. It would be
4465 proper to subtract the symbol's value,
4466 osec->vma, from the emitted reloc addend,
4467 but ld.so expects buggy relocs. */
607c0e09
AS		 4468 osec = sec->output_section;
4469 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 4470 if (sindx == 0)
4471 {
4472 asection *oi = htab->elf.text_index_section;
4473 sindx = elf_section_data (oi)->dynindx;
4474 }
4475 BFD_ASSERT (sindx != 0);
607c0e09
AS		 4476 }
4477
351f65ca 4478 outrel.r_info = htab->r_info (sindx, r_type);
607c0e09
AS		 4479 outrel.r_addend = relocation + rel->r_addend;
4480 }
70256ad8
AJ		 4481 }
4482
cbe950e9 4483 sreloc = elf_section_data (input_section)->sreloc;
d8045f23 4484
62d78908
L		 4485 if (sreloc == NULL || sreloc->contents == NULL)
4486 {
4487 r = bfd_reloc_notsupported;
4488 goto check_relocation_error;
4489 }
c434dee6 4490
351f65ca 4491 elf_append_rela (output_bfd, sreloc, &outrel);
70256ad8
AJ		 4492
4493 /* If this reloc is against an external symbol, we do
4494 not want to fiddle with the addend. Otherwise, we
4495 need to include the symbol value so that it becomes
4496 an addend for the dynamic reloc. */
0f88be7a 4497 if (! relocate)
70256ad8
AJ		 4498 continue;
4499 }
4500
4501 break;
4502
bffbf940 4503 case R_X86_64_TLSGD:
67a4f2b7
AO		 4504 case R_X86_64_GOTPC32_TLSDESC:
4505 case R_X86_64_TLSDESC_CALL:
bffbf940 4506 case R_X86_64_GOTTPOFF:
bffbf940
JJ		 4507 tls_type = GOT_UNKNOWN;
4508 if (h == NULL && local_got_offsets)
351f65ca 4509 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
bffbf940 4510 else if (h != NULL)
351f65ca 4511 tls_type = elf_x86_64_hash_entry (h)->tls_type;
142411ca 4512
351f65ca
L		 4513 if (! elf_x86_64_tls_transition (info, input_bfd,
4514 input_section, contents,
4515 symtab_hdr, sym_hashes,
4516 &r_type, tls_type, rel,
4517 relend, h, r_symndx))
534a31f6 4518 return FALSE;
bffbf940
JJ		 4519
4520 if (r_type == R_X86_64_TPOFF32)
4521 {
142411ca
L		 4522 bfd_vma roff = rel->r_offset;
4523
bffbf940 4524 BFD_ASSERT (! unresolved_reloc);
142411ca 4525
351f65ca 4526 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
bffbf940 4527 {
52bc799a 4528 /* GD->LE transition. For 64bit, change
abcf1d52 4529 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
a3fadc9a 4530 .word 0x6666; rex64; call __tls_get_addr
52bc799a 4531 into:
bffbf940 4532 movq %fs:0, %rax
52bc799a
L		 4533 leaq foo@tpoff(%rax), %rax
4534 For 32bit, change
4535 leaq foo@tlsgd(%rip), %rdi
4536 .word 0x6666; rex64; call __tls_get_addr
4537 into:
4538 movl %fs:0, %eax
5c98a14e
JJ		 4539 leaq foo@tpoff(%rax), %rax
4540 For largepic, change:
4541 leaq foo@tlsgd(%rip), %rdi
4542 movabsq $__tls_get_addr@pltoff, %rax
4543 addq %rbx, %rax
4544 call *%rax
4545 into:
4546 movq %fs:0, %rax
4547 leaq foo@tpoff(%rax), %rax
4548 nopw 0x0(%rax,%rax,1) */
4549 int largepic = 0;
4550 if (ABI_64_P (output_bfd)
4551 && contents[roff + 5] == (bfd_byte) '\xb8')
4552 {
4553 memcpy (contents + roff - 3,
4554 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4555 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4556 largepic = 1;
4557 }
4558 else if (ABI_64_P (output_bfd))
52bc799a
L		 4559 memcpy (contents + roff - 4,
4560 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4561 16);
4562 else
4563 memcpy (contents + roff - 3,
4564 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4565 15);
eb4ff4d6 4566 bfd_put_32 (output_bfd,
351f65ca 4567 elf_x86_64_tpoff (info, relocation),
5c98a14e
JJ		 4568 contents + roff + 8 + largepic);
4569 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
bffbf940
JJ		 4570 rel++;
4571 continue;
4572 }
351f65ca 4573 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
67a4f2b7
AO		 4574 {
4575 /* GDesc -> LE transition.
4576 It's originally something like:
4577 leaq x@tlsdesc(%rip), %rax
4578
4579 Change it to:
c9736ba0 4580 movl $x@tpoff, %rax. */
67a4f2b7 4581
c9736ba0 4582 unsigned int val, type;
67a4f2b7 4583
67a4f2b7 4584 type = bfd_get_8 (input_bfd, contents + roff - 3);
67a4f2b7 4585 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 4586 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
4587 contents + roff - 3);
4588 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
4589 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4590 contents + roff - 1);
eb4ff4d6 4591 bfd_put_32 (output_bfd,
351f65ca 4592 elf_x86_64_tpoff (info, relocation),
67a4f2b7
AO		 4593 contents + roff);
4594 continue;
4595 }
351f65ca 4596 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
67a4f2b7
AO		 4597 {
4598 /* GDesc -> LE transition.
4599 It's originally:
4600 call *(%rax)
4601 Turn it into:
142411ca 4602 xchg %ax,%ax. */
10efb593 4603 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4604 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4605 continue;
4606 }
351f65ca 4607 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
bffbf940 4608 {
bffbf940 4609 /* IE->LE transition:
cf61b747 4610 For 64bit, originally it can be one of:
bffbf940
JJ		 4611 movq foo@gottpoff(%rip), %reg
4612 addq foo@gottpoff(%rip), %reg
4613 We change it into:
4614 movq $foo, %reg
4615 leaq foo(%reg), %reg
cf61b747
L		 4616 addq $foo, %reg.
4617 For 32bit, originally it can be one of:
4618 movq foo@gottpoff(%rip), %reg
4619 addl foo@gottpoff(%rip), %reg
4620 We change it into:
4621 movq $foo, %reg
4622 leal foo(%reg), %reg
4623 addl $foo, %reg. */
142411ca
L		 4624
4625 unsigned int val, type, reg;
4626
cf61b747
L		 4627 if (roff >= 3)
4628 val = bfd_get_8 (input_bfd, contents + roff - 3);
4629 else
4630 val = 0;
142411ca
L		 4631 type = bfd_get_8 (input_bfd, contents + roff - 2);
4632 reg = bfd_get_8 (input_bfd, contents + roff - 1);
bffbf940 4633 reg >>= 3;
bffbf940
JJ		 4634 if (type == 0x8b)
4635 {
4636 /* movq */
4637 if (val == 0x4c)
4638 bfd_put_8 (output_bfd, 0x49,
142411ca 4639 contents + roff - 3);
4a4c5f25
L		 4640 else if (!ABI_64_P (output_bfd) && val == 0x44)
4641 bfd_put_8 (output_bfd, 0x41,
4642 contents + roff - 3);
bffbf940 4643 bfd_put_8 (output_bfd, 0xc7,
142411ca 4644 contents + roff - 2);
bffbf940 4645 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4646 contents + roff - 1);
bffbf940
JJ		 4647 }
4648 else if (reg == 4)
4649 {
cf61b747
L		 4650 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4651 is special */
bffbf940
JJ		 4652 if (val == 0x4c)
4653 bfd_put_8 (output_bfd, 0x49,
142411ca 4654 contents + roff - 3);
4a4c5f25
L		 4655 else if (!ABI_64_P (output_bfd) && val == 0x44)
4656 bfd_put_8 (output_bfd, 0x41,
4657 contents + roff - 3);
bffbf940 4658 bfd_put_8 (output_bfd, 0x81,
142411ca 4659 contents + roff - 2);
bffbf940 4660 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4661 contents + roff - 1);
bffbf940
JJ		 4662 }
4663 else
4664 {
cf61b747 4665 /* addq/addl -> leaq/leal */
bffbf940
JJ		 4666 if (val == 0x4c)
4667 bfd_put_8 (output_bfd, 0x4d,
142411ca 4668 contents + roff - 3);
4a4c5f25
L		 4669 else if (!ABI_64_P (output_bfd) && val == 0x44)
4670 bfd_put_8 (output_bfd, 0x45,
4671 contents + roff - 3);
bffbf940 4672 bfd_put_8 (output_bfd, 0x8d,
142411ca 4673 contents + roff - 2);
bffbf940 4674 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
142411ca 4675 contents + roff - 1);
bffbf940 4676 }
eb4ff4d6 4677 bfd_put_32 (output_bfd,
351f65ca 4678 elf_x86_64_tpoff (info, relocation),
142411ca 4679 contents + roff);
bffbf940
JJ		 4680 continue;
4681 }
142411ca
L		 4682 else
4683 BFD_ASSERT (FALSE);
bffbf940
JJ		 4684 }
4685
6de2ae4a 4686 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4687 abort ();
4688
4689 if (h != NULL)
67a4f2b7
AO		 4690 {
4691 off = h->got.offset;
351f65ca 4692 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
67a4f2b7 4693 }
bffbf940
JJ		 4694 else
4695 {
4696 if (local_got_offsets == NULL)
4697 abort ();
4698
4699 off = local_got_offsets[r_symndx];
67a4f2b7 4700 offplt = local_tlsdesc_gotents[r_symndx];
bffbf940
JJ		 4701 }
4702
4703 if ((off & 1) != 0)
4704 off &= ~1;
26e41594 4705 else
bffbf940
JJ		 4706 {
4707 Elf_Internal_Rela outrel;
bffbf940 4708 int dr_type, indx;
67a4f2b7 4709 asection *sreloc;
bffbf940 4710
6de2ae4a 4711 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4712 abort ();
4713
67a4f2b7
AO		 4714 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4715
4716 if (GOT_TLS_GDESC_P (tls_type))
4717 {
351f65ca 4718 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
67a4f2b7 4719 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
6de2ae4a
L		 4720 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4721 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4722 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4723 + offplt
4724 + htab->sgotplt_jump_table_size);
6de2ae4a 4725 sreloc = htab->elf.srelplt;
67a4f2b7 4726 if (indx == 0)
351f65ca 4727 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
67a4f2b7
AO		 4728 else
4729 outrel.r_addend = 0;
351f65ca 4730 elf_append_rela (output_bfd, sreloc, &outrel);
67a4f2b7
AO		 4731 }
4732
6de2ae4a 4733 sreloc = htab->elf.srelgot;
67a4f2b7 4734
6de2ae4a
L		 4735 outrel.r_offset = (htab->elf.sgot->output_section->vma
4736 + htab->elf.sgot->output_offset + off);
bffbf940 4737
67a4f2b7 4738 if (GOT_TLS_GD_P (tls_type))
bffbf940 4739 dr_type = R_X86_64_DTPMOD64;
67a4f2b7
AO		 4740 else if (GOT_TLS_GDESC_P (tls_type))
4741 goto dr_done;
bffbf940
JJ		 4742 else
4743 dr_type = R_X86_64_TPOFF64;
4744
6de2ae4a 4745 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
bffbf940 4746 outrel.r_addend = 0;
67a4f2b7
AO		 4747 if ((dr_type == R_X86_64_TPOFF64
4748 || dr_type == R_X86_64_TLSDESC) && indx == 0)
351f65ca
L		 4749 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4750 outrel.r_info = htab->r_info (indx, dr_type);
bffbf940 4751
351f65ca 4752 elf_append_rela (output_bfd, sreloc, &outrel);
bffbf940 4753
67a4f2b7 4754 if (GOT_TLS_GD_P (tls_type))
bffbf940
JJ		 4755 {
4756 if (indx == 0)
4757 {
d40d037c 4758 BFD_ASSERT (! unresolved_reloc);
bffbf940 4759 bfd_put_64 (output_bfd,
351f65ca 4760 relocation - elf_x86_64_dtpoff_base (info),
6de2ae4a 4761 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
bffbf940
JJ		 4762 }
4763 else
4764 {
4765 bfd_put_64 (output_bfd, 0,
6de2ae4a 4766 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4767 outrel.r_info = htab->r_info (indx,
bffbf940
JJ		 4768 R_X86_64_DTPOFF64);
4769 outrel.r_offset += GOT_ENTRY_SIZE;
351f65ca 4770 elf_append_rela (output_bfd, sreloc,
464d3bd4 4771 &outrel);
bffbf940
JJ		 4772 }
4773 }
4774
67a4f2b7 4775 dr_done:
bffbf940
JJ		 4776 if (h != NULL)
4777 h->got.offset |= 1;
4778 else
4779 local_got_offsets[r_symndx] |= 1;
4780 }
4781
67a4f2b7
AO		 4782 if (off >= (bfd_vma) -2
4783 && ! GOT_TLS_GDESC_P (tls_type))
bffbf940 4784 abort ();
351f65ca 4785 if (r_type == ELF32_R_TYPE (rel->r_info))
bffbf940 4786 {
67a4f2b7
AO		 4787 if (r_type == R_X86_64_GOTPC32_TLSDESC
4788 || r_type == R_X86_64_TLSDESC_CALL)
6de2ae4a
L		 4789 relocation = htab->elf.sgotplt->output_section->vma
4790 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4791 + offplt + htab->sgotplt_jump_table_size;
4792 else
6de2ae4a
L		 4793 relocation = htab->elf.sgot->output_section->vma
4794 + htab->elf.sgot->output_offset + off;
b34976b6 4795 unresolved_reloc = FALSE;
bffbf940 4796 }
142411ca 4797 else
67a4f2b7 4798 {
142411ca 4799 bfd_vma roff = rel->r_offset;
67a4f2b7 4800
351f65ca 4801 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
142411ca 4802 {
52bc799a 4803 /* GD->IE transition. For 64bit, change
142411ca
L		 4804 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4805 .word 0x6666; rex64; call __tls_get_addr@plt
52bc799a 4806 into:
142411ca 4807 movq %fs:0, %rax
52bc799a
L		 4808 addq foo@gottpoff(%rip), %rax
4809 For 32bit, change
4810 leaq foo@tlsgd(%rip), %rdi
4811 .word 0x6666; rex64; call __tls_get_addr@plt
4812 into:
4813 movl %fs:0, %eax
5c98a14e
JJ		 4814 addq foo@gottpoff(%rip), %rax
4815 For largepic, change:
4816 leaq foo@tlsgd(%rip), %rdi
4817 movabsq $__tls_get_addr@pltoff, %rax
4818 addq %rbx, %rax
4819 call *%rax
4820 into:
4821 movq %fs:0, %rax
4822 addq foo@gottpoff(%rax), %rax
4823 nopw 0x0(%rax,%rax,1) */
4824 int largepic = 0;
4825 if (ABI_64_P (output_bfd)
4826 && contents[roff + 5] == (bfd_byte) '\xb8')
4827 {
4828 memcpy (contents + roff - 3,
4829 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4830 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4831 largepic = 1;
4832 }
4833 else if (ABI_64_P (output_bfd))
52bc799a
L		 4834 memcpy (contents + roff - 4,
4835 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4836 16);
4837 else
4838 memcpy (contents + roff - 3,
4839 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4840 15);
142411ca 4841
6de2ae4a
L		 4842 relocation = (htab->elf.sgot->output_section->vma
4843 + htab->elf.sgot->output_offset + off
142411ca 4844 - roff
5c98a14e 4845 - largepic
142411ca
L		 4846 - input_section->output_section->vma
4847 - input_section->output_offset
4848 - 12);
4849 bfd_put_32 (output_bfd, relocation,
5c98a14e
JJ		 4850 contents + roff + 8 + largepic);
4851 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
142411ca
L		 4852 rel++;
4853 continue;
4854 }
351f65ca 4855 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
142411ca
L		 4856 {
4857 /* GDesc -> IE transition.
4858 It's originally something like:
4859 leaq x@tlsdesc(%rip), %rax
67a4f2b7 4860
142411ca 4861 Change it to:
c9736ba0 4862 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
67a4f2b7 4863
142411ca
L		 4864 /* Now modify the instruction as appropriate. To
4865 turn a leaq into a movq in the form we use it, it
4866 suffices to change the second byte from 0x8d to
4867 0x8b. */
4868 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4869
4870 bfd_put_32 (output_bfd,
6de2ae4a
L		 4871 htab->elf.sgot->output_section->vma
4872 + htab->elf.sgot->output_offset + off
142411ca
L		 4873 - rel->r_offset
4874 - input_section->output_section->vma
4875 - input_section->output_offset
4876 - 4,
4877 contents + roff);
4878 continue;
4879 }
351f65ca 4880 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
142411ca
L		 4881 {
4882 /* GDesc -> IE transition.
4883 It's originally:
4884 call *(%rax)
4885
4886 Change it to:
c9736ba0 4887 xchg %ax, %ax. */
142411ca 4888
142411ca
L		 4889 bfd_put_8 (output_bfd, 0x66, contents + roff);
4890 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4891 continue;
4892 }
4893 else
4894 BFD_ASSERT (FALSE);
67a4f2b7 4895 }
bffbf940
JJ		 4896 break;
4897
4898 case R_X86_64_TLSLD:
351f65ca
L		 4899 if (! elf_x86_64_tls_transition (info, input_bfd,
4900 input_section, contents,
4901 symtab_hdr, sym_hashes,
4902 &r_type, GOT_UNKNOWN,
4903 rel, relend, h, r_symndx))
142411ca 4904 return FALSE;
a3fadc9a 4905
142411ca
L		 4906 if (r_type != R_X86_64_TLSLD)
4907 {
bffbf940 4908 /* LD->LE transition:
a3fadc9a 4909 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
52bc799a
L		 4910 For 64bit, we change it into:
4911 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4912 For 32bit, we change it into:
5c98a14e
JJ		 4913 nopl 0x0(%rax); movl %fs:0, %eax.
4914 For largepic, change:
4915 leaq foo@tlsgd(%rip), %rdi
4916 movabsq $__tls_get_addr@pltoff, %rax
4917 addq %rbx, %rax
4918 call *%rax
4919 into:
4920 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4921 movq %fs:0, %eax */
142411ca
L		 4922
4923 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5c98a14e
JJ		 4924 if (ABI_64_P (output_bfd)
4925 && contents[rel->r_offset + 5] == (bfd_byte) '\xb8')
4926 memcpy (contents + rel->r_offset - 3,
4927 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4928 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4929 else if (ABI_64_P (output_bfd))
52bc799a
L		 4930 memcpy (contents + rel->r_offset - 3,
4931 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4932 else
4933 memcpy (contents + rel->r_offset - 3,
4934 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5c98a14e 4935 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
bffbf940
JJ		 4936 rel++;
4937 continue;
4938 }
4939
6de2ae4a 4940 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4941 abort ();
4942
4943 off = htab->tls_ld_got.offset;
4944 if (off & 1)
4945 off &= ~1;
4946 else
4947 {
4948 Elf_Internal_Rela outrel;
bffbf940 4949
6de2ae4a 4950 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4951 abort ();
4952
6de2ae4a
L		 4953 outrel.r_offset = (htab->elf.sgot->output_section->vma
4954 + htab->elf.sgot->output_offset + off);
bffbf940
JJ		 4955
4956 bfd_put_64 (output_bfd, 0,
6de2ae4a 4957 htab->elf.sgot->contents + off);
bffbf940 4958 bfd_put_64 (output_bfd, 0,
6de2ae4a 4959 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4960 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
bffbf940 4961 outrel.r_addend = 0;
351f65ca 4962 elf_append_rela (output_bfd, htab->elf.srelgot,
464d3bd4 4963 &outrel);
bffbf940
JJ		 4964 htab->tls_ld_got.offset |= 1;
4965 }
6de2ae4a
L		 4966 relocation = htab->elf.sgot->output_section->vma
4967 + htab->elf.sgot->output_offset + off;
b34976b6 4968 unresolved_reloc = FALSE;
bffbf940
JJ		 4969 break;
4970
4971 case R_X86_64_DTPOFF32:
1d85728f 4972 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
351f65ca 4973 relocation -= elf_x86_64_dtpoff_base (info);
bffbf940 4974 else
351f65ca 4975 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4976 break;
4977
4978 case R_X86_64_TPOFF32:
6769d501 4979 case R_X86_64_TPOFF64:
9b769489 4980 BFD_ASSERT (info->executable);
351f65ca 4981 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4982 break;
4983
a69ed7f7
L		 4984 case R_X86_64_DTPOFF64:
4985 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
4986 relocation -= elf_x86_64_dtpoff_base (info);
4987 break;
4988
70256ad8
AJ		 4989 default:
4990 break;
4991 }
8d88c4ca 4992
239e1f3a
AM		 4993 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4994 because such sections are not SEC_ALLOC and thus ld.so will
4995 not process them. */
c434dee6 4996 if (unresolved_reloc
239e1f3a 4997 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4998 && h->def_dynamic)
4999 && _bfd_elf_section_offset (output_bfd, info, input_section,
5000 rel->r_offset) != (bfd_vma) -1)
a040981f
L		 5001 {
5002 (*_bfd_error_handler)
5003 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5004 input_bfd,
5005 input_section,
5006 (long) rel->r_offset,
5007 howto->name,
5008 h->root.root.string);
5009 return FALSE;
5010 }
c434dee6 5011
cbe950e9 5012do_relocation:
8d88c4ca 5013 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ		 5014 contents, rel->r_offset,
5015 relocation, rel->r_addend);
8d88c4ca 5016
62d78908 5017check_relocation_error:
8d88c4ca 5018 if (r != bfd_reloc_ok)
8da6118f 5019 {
c434dee6
AJ		 5020 const char *name;
5021
5022 if (h != NULL)
5023 name = h->root.root.string;
5024 else
8da6118f 5025 {
c434dee6
AJ		 5026 name = bfd_elf_string_from_elf_section (input_bfd,
5027 symtab_hdr->sh_link,
5028 sym->st_name);
5029 if (name == NULL)
b34976b6 5030 return FALSE;
c434dee6
AJ		 5031 if (*name == '\0')
5032 name = bfd_section_name (input_bfd, sec);
5033 }
5034
5035 if (r == bfd_reloc_overflow)
5036 {
c434dee6 5037 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 5038 (info, (h ? &h->root : NULL), name, howto->name,
5039 (bfd_vma) 0, input_bfd, input_section,
5040 rel->r_offset)))
b34976b6 5041 return FALSE;
c434dee6
AJ		 5042 }
5043 else
5044 {
5045 (*_bfd_error_handler)
bb95161d 5046 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
d003868e 5047 input_bfd, input_section,
c434dee6 5048 (long) rel->r_offset, name, (int) r);
b34976b6 5049 return FALSE;
8da6118f
KH		 5050 }
5051 }
8d88c4ca 5052 }
70256ad8 5053
b34976b6 5054 return TRUE;
70256ad8
AJ		 5055}
5056
5057/* Finish up dynamic symbol handling. We set the contents of various
5058 dynamic sections here. */
5059
b34976b6 5060static bfd_boolean
351f65ca
L		 5061elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
5062 struct bfd_link_info *info,
5063 struct elf_link_hash_entry *h,
220cf809 5064 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
70256ad8 5065{
351f65ca 5066 struct elf_x86_64_link_hash_table *htab;
0ff2b86e
L		 5067 const struct elf_x86_64_backend_data *abed;
5068 bfd_boolean use_plt_bnd;
dd7e64d4 5069 struct elf_x86_64_link_hash_entry *eh;
70256ad8 5070
351f65ca 5071 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 5072 if (htab == NULL)
5073 return FALSE;
70256ad8 5074
0ff2b86e
L		 5075 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5076 section only if there is .plt section. */
5077 use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL;
5078 abed = (use_plt_bnd
5079 ? &elf_x86_64_bnd_arch_bed
5080 : get_elf_x86_64_backend_data (output_bfd));
5081
dd7e64d4
L		 5082 eh = (struct elf_x86_64_link_hash_entry *) h;
5083
70256ad8
AJ		 5084 if (h->plt.offset != (bfd_vma) -1)
5085 {
70256ad8 5086 bfd_vma plt_index;
0ff2b86e
L		 5087 bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset;
5088 bfd_vma plt_plt_insn_end, plt_got_insn_size;
70256ad8 5089 Elf_Internal_Rela rela;
947216bf 5090 bfd_byte *loc;
0ff2b86e 5091 asection *plt, *gotplt, *relplt, *resolved_plt;
351f65ca 5092 const struct elf_backend_data *bed;
5974eba6 5093 bfd_vma plt_got_pcrel_offset;
cbe950e9
L		 5094
5095 /* When building a static executable, use .iplt, .igot.plt and
5096 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 5097 if (htab->elf.splt != NULL)
cbe950e9 5098 {
6de2ae4a
L		 5099 plt = htab->elf.splt;
5100 gotplt = htab->elf.sgotplt;
5101 relplt = htab->elf.srelplt;
cbe950e9
L		 5102 }
5103 else
5104 {
6de2ae4a
L		 5105 plt = htab->elf.iplt;
5106 gotplt = htab->elf.igotplt;
5107 relplt = htab->elf.irelplt;
cbe950e9 5108 }
70256ad8
AJ		 5109
5110 /* This symbol has an entry in the procedure linkage table. Set
407443a3 5111 it up. */
cbe950e9
L		 5112 if ((h->dynindx == -1
5113 && !((h->forced_local || info->executable)
5114 && h->def_regular
5115 && h->type == STT_GNU_IFUNC))
5116 || plt == NULL
5117 || gotplt == NULL
5118 || relplt == NULL)
cec7f46a 5119 abort ();
70256ad8
AJ		 5120
5121 /* Get the index in the procedure linkage table which
5122 corresponds to this symbol. This is the index of this symbol
5123 in all the symbols for which we are making plt entries. The
cbe950e9 5124 first entry in the procedure linkage table is reserved.
6bbec505 5125
cbe950e9 5126 Get the offset into the .got table of the entry that
407443a3 5127 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
cbe950e9
L		 5128 bytes. The first three are reserved for the dynamic linker.
5129
5130 For static executables, we don't reserve anything. */
5131
6de2ae4a 5132 if (plt == htab->elf.splt)
cbe950e9 5133 {
eed180f8 5134 got_offset = h->plt.offset / abed->plt_entry_size - 1;
e1f98742 5135 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
cbe950e9
L		 5136 }
5137 else
5138 {
eed180f8 5139 got_offset = h->plt.offset / abed->plt_entry_size;
e1f98742 5140 got_offset = got_offset * GOT_ENTRY_SIZE;
cbe950e9 5141 }
70256ad8 5142
0ff2b86e
L		 5143 plt_plt_insn_end = abed->plt_plt_insn_end;
5144 plt_plt_offset = abed->plt_plt_offset;
5145 plt_got_insn_size = abed->plt_got_insn_size;
5146 plt_got_offset = abed->plt_got_offset;
5147 if (use_plt_bnd)
5148 {
5149 /* Use the second PLT with BND relocations. */
5150 const bfd_byte *plt_entry, *plt2_entry;
0ff2b86e
L		 5151
5152 if (eh->has_bnd_reloc)
5153 {
5154 plt_entry = elf_x86_64_bnd_plt_entry;
5155 plt2_entry = elf_x86_64_bnd_plt2_entry;
5156 }
5157 else
5158 {
5159 plt_entry = elf_x86_64_legacy_plt_entry;
5160 plt2_entry = elf_x86_64_legacy_plt2_entry;
5161
5162 /* Subtract 1 since there is no BND prefix. */
5163 plt_plt_insn_end -= 1;
5164 plt_plt_offset -= 1;
5165 plt_got_insn_size -= 1;
5166 plt_got_offset -= 1;
5167 }
5168
5169 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry)
5170 == sizeof (elf_x86_64_legacy_plt_entry));
5171
5172 /* Fill in the entry in the procedure linkage table. */
5173 memcpy (plt->contents + h->plt.offset,
5174 plt_entry, sizeof (elf_x86_64_legacy_plt_entry));
5175 /* Fill in the entry in the second PLT. */
5176 memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset,
5177 plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5178
5179 resolved_plt = htab->plt_bnd;
5180 plt_offset = eh->plt_bnd.offset;
5181 }
5182 else
5183 {
5184 /* Fill in the entry in the procedure linkage table. */
5185 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
5186 abed->plt_entry_size);
5187
5188 resolved_plt = plt;
5189 plt_offset = h->plt.offset;
5190 }
eed180f8
RM		 5191
5192 /* Insert the relocation positions of the plt section. */
5193
5194 /* Put offset the PC-relative instruction referring to the GOT entry,
5195 subtracting the size of that instruction. */
ab7fede8
L		 5196 plt_got_pcrel_offset = (gotplt->output_section->vma
5197 + gotplt->output_offset
5198 + got_offset
5199 - resolved_plt->output_section->vma
5200 - resolved_plt->output_offset
5201 - plt_offset
5202 - plt_got_insn_size);
5203
5204 /* Check PC-relative offset overflow in PLT entry. */
5974eba6 5205 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
ab7fede8
L		 5206 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5207 output_bfd, h->root.root.string);
5208
5209 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
0ff2b86e 5210 resolved_plt->contents + plt_offset + plt_got_offset);
cbe950e9 5211
653165cc 5212 /* Fill in the entry in the global offset table, initially this
eed180f8 5213 points to the second part of the PLT entry. */
cbe950e9
L		 5214 bfd_put_64 (output_bfd, (plt->output_section->vma
5215 + plt->output_offset
eed180f8 5216 + h->plt.offset + abed->plt_lazy_offset),
cbe950e9 5217 gotplt->contents + got_offset);
70256ad8
AJ		 5218
5219 /* Fill in the entry in the .rela.plt section. */
cbe950e9
L		 5220 rela.r_offset = (gotplt->output_section->vma
5221 + gotplt->output_offset
70256ad8 5222 + got_offset);
cbe950e9
L		 5223 if (h->dynindx == -1
5224 || ((info->executable
5225 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5226 && h->def_regular
5227 && h->type == STT_GNU_IFUNC))
5228 {
5229 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5230 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
351f65ca 5231 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
cbe950e9
L		 5232 rela.r_addend = (h->root.u.def.value
5233 + h->root.u.def.section->output_section->vma
5234 + h->root.u.def.section->output_offset);
e1f98742
L		 5235 /* R_X86_64_IRELATIVE comes last. */
5236 plt_index = htab->next_irelative_index--;
cbe950e9
L		 5237 }
5238 else
5239 {
351f65ca 5240 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
cbe950e9 5241 rela.r_addend = 0;
e1f98742
L		 5242 plt_index = htab->next_jump_slot_index++;
5243 }
5244
5245 /* Don't fill PLT entry for static executables. */
5246 if (plt == htab->elf.splt)
5247 {
35a14c6b
L		 5248 bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end;
5249
e1f98742
L		 5250 /* Put relocation index. */
5251 bfd_put_32 (output_bfd, plt_index,
eed180f8 5252 plt->contents + h->plt.offset + abed->plt_reloc_offset);
35a14c6b
L		 5253
5254 /* Put offset for jmp .PLT0 and check for overflow. We don't
5255 check relocation index for overflow since branch displacement
5256 will overflow first. */
5257 if (plt0_offset > 0x80000000)
5258 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5259 output_bfd, h->root.root.string);
5260 bfd_put_32 (output_bfd, - plt0_offset,
0ff2b86e 5261 plt->contents + h->plt.offset + plt_plt_offset);
cbe950e9 5262 }
351f65ca
L		 5263
5264 bed = get_elf_backend_data (output_bfd);
5265 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
82e96e07 5266 bed->s->swap_reloca_out (output_bfd, &rela, loc);
dd7e64d4
L		 5267 }
5268 else if (eh->plt_got.offset != (bfd_vma) -1)
5269 {
5270 bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size;
5271 asection *plt, *got;
5272 bfd_boolean got_after_plt;
5273 int32_t got_pcrel_offset;
5274 const bfd_byte *got_plt_entry;
5275
5276 /* Set the entry in the GOT procedure linkage table. */
5277 plt = htab->plt_got;
5278 got = htab->elf.sgot;
5279 got_offset = h->got.offset;
5280
5281 if (got_offset == (bfd_vma) -1
5282 || h->type == STT_GNU_IFUNC
5283 || plt == NULL
5284 || got == NULL)
5285 abort ();
70256ad8 5286
dd7e64d4
L		 5287 /* Use the second PLT entry template for the GOT PLT since they
5288 are the identical. */
5289 plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size;
5290 plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset;
5291 if (eh->has_bnd_reloc)
5292 got_plt_entry = elf_x86_64_bnd_plt2_entry;
5293 else
70256ad8 5294 {
dd7e64d4
L		 5295 got_plt_entry = elf_x86_64_legacy_plt2_entry;
5296
5297 /* Subtract 1 since there is no BND prefix. */
5298 plt_got_insn_size -= 1;
5299 plt_got_offset -= 1;
70256ad8 5300 }
dd7e64d4
L		 5301
5302 /* Fill in the entry in the GOT procedure linkage table. */
5303 plt_offset = eh->plt_got.offset;
5304 memcpy (plt->contents + plt_offset,
5305 got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5306
5307 /* Put offset the PC-relative instruction referring to the GOT
5308 entry, subtracting the size of that instruction. */
5309 got_pcrel_offset = (got->output_section->vma
5310 + got->output_offset
5311 + got_offset
5312 - plt->output_section->vma
5313 - plt->output_offset
5314 - plt_offset
5315 - plt_got_insn_size);
5316
5317 /* Check PC-relative offset overflow in GOT PLT entry. */
5318 got_after_plt = got->output_section->vma > plt->output_section->vma;
5319 if ((got_after_plt && got_pcrel_offset < 0)
5320 || (!got_after_plt && got_pcrel_offset > 0))
5321 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5322 output_bfd, h->root.root.string);
5323
5324 bfd_put_32 (output_bfd, got_pcrel_offset,
5325 plt->contents + plt_offset + plt_got_offset);
5326 }
5327
5328 if (!h->def_regular
5329 && (h->plt.offset != (bfd_vma) -1
5330 || eh->plt_got.offset != (bfd_vma) -1))
5331 {
5332 /* Mark the symbol as undefined, rather than as defined in
5333 the .plt section. Leave the value if there were any
5334 relocations where pointer equality matters (this is a clue
5335 for the dynamic linker, to make function pointer
5336 comparisons work between an application and shared
5337 library), otherwise set it to zero. If a function is only
5338 called from a binary, there is no need to slow down
5339 shared libraries because of that. */
5340 sym->st_shndx = SHN_UNDEF;
5341 if (!h->pointer_equality_needed)
5342 sym->st_value = 0;
70256ad8
AJ		 5343 }
5344
bffbf940 5345 if (h->got.offset != (bfd_vma) -1
351f65ca
L		 5346 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
5347 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 5348 {
053579d7
AJ		 5349 Elf_Internal_Rela rela;
5350
5351 /* This symbol has an entry in the global offset table. Set it
bffbf940 5352 up. */
6de2ae4a 5353 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
c434dee6 5354 abort ();
053579d7 5355
6de2ae4a
L		 5356 rela.r_offset = (htab->elf.sgot->output_section->vma
5357 + htab->elf.sgot->output_offset
dc810e39 5358 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ		 5359
5360 /* If this is a static link, or it is a -Bsymbolic link and the
5361 symbol is defined locally or was forced to be local because
5362 of a version file, we just want to emit a RELATIVE reloc.
5363 The entry in the global offset table will already have been
5364 initialized in the relocate_section function. */
710ab287 5365 if (h->def_regular
0018b0a3
L		 5366 && h->type == STT_GNU_IFUNC)
5367 {
710ab287
L		 5368 if (info->shared)
5369 {
5370 /* Generate R_X86_64_GLOB_DAT. */
5371 goto do_glob_dat;
5372 }
5373 else
5374 {
90d60710
L		 5375 asection *plt;
5376
710ab287
L		 5377 if (!h->pointer_equality_needed)
5378 abort ();
5379
5380 /* For non-shared object, we can't use .got.plt, which
5381 contains the real function addres if we need pointer
5382 equality. We load the GOT entry with the PLT entry. */
90d60710 5383 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L		 5384 bfd_put_64 (output_bfd, (plt->output_section->vma
5385 + plt->output_offset
5386 + h->plt.offset),
6de2ae4a 5387 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 5388 return TRUE;
5389 }
0018b0a3
L		 5390 }
5391 else if (info->shared
5392 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 5393 {
41bed6dd
L		 5394 if (!h->def_regular)
5395 return FALSE;
cc78d0af 5396 BFD_ASSERT((h->got.offset & 1) != 0);
351f65ca 5397 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
053579d7
AJ		 5398 rela.r_addend = (h->root.u.def.value
5399 + h->root.u.def.section->output_section->vma
5400 + h->root.u.def.section->output_offset);
5401 }
5402 else
5403 {
5404 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 5405do_glob_dat:
c434dee6 5406 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 5407 htab->elf.sgot->contents + h->got.offset);
351f65ca 5408 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
053579d7
AJ		 5409 rela.r_addend = 0;
5410 }
5411
351f65ca 5412 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
053579d7
AJ		 5413 }
5414
f5385ebf 5415 if (h->needs_copy)
70256ad8 5416 {
70256ad8
AJ		 5417 Elf_Internal_Rela rela;
5418
5419 /* This symbol needs a copy reloc. Set it up. */
5420
c434dee6
AJ		 5421 if (h->dynindx == -1
5422 || (h->root.type != bfd_link_hash_defined
5423 && h->root.type != bfd_link_hash_defweak)
5424 || htab->srelbss == NULL)
5425 abort ();
70256ad8
AJ		 5426
5427 rela.r_offset = (h->root.u.def.value
5428 + h->root.u.def.section->output_section->vma
5429 + h->root.u.def.section->output_offset);
351f65ca 5430 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
70256ad8 5431 rela.r_addend = 0;
351f65ca 5432 elf_append_rela (output_bfd, htab->srelbss, &rela);
70256ad8
AJ		 5433 }
5434
b34976b6 5435 return TRUE;
70256ad8
AJ		 5436}
5437
c25bc9fc
L		 5438/* Finish up local dynamic symbol handling. We set the contents of
5439 various dynamic sections here. */
5440
5441static bfd_boolean
351f65ca 5442elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
c25bc9fc
L		 5443{
5444 struct elf_link_hash_entry *h
5445 = (struct elf_link_hash_entry *) *slot;
5446 struct bfd_link_info *info
eed180f8 5447 = (struct bfd_link_info *) inf;
c25bc9fc 5448
351f65ca 5449 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
c25bc9fc
L		 5450 info, h, NULL);
5451}
5452
c434dee6
AJ		 5453/* Used to decide how to sort relocs in an optimal manner for the
5454 dynamic linker, before writing them out. */
5455
5456static enum elf_reloc_type_class
7e612e98
AM		 5457elf_x86_64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
5458 const asection *rel_sec ATTRIBUTE_UNUSED,
5459 const Elf_Internal_Rela *rela)
c434dee6 5460{
351f65ca 5461 switch ((int) ELF32_R_TYPE (rela->r_info))
c434dee6
AJ		 5462 {
5463 case R_X86_64_RELATIVE:
1da80baa 5464 case R_X86_64_RELATIVE64:
c434dee6
AJ		 5465 return reloc_class_relative;
5466 case R_X86_64_JUMP_SLOT:
5467 return reloc_class_plt;
5468 case R_X86_64_COPY:
5469 return reloc_class_copy;
5470 default:
5471 return reloc_class_normal;
5472 }
5473}
5474
70256ad8
AJ		 5475/* Finish up the dynamic sections. */
5476
b34976b6 5477static bfd_boolean
351f65ca
L		 5478elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
5479 struct bfd_link_info *info)
70256ad8 5480{
351f65ca 5481 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 5482 bfd *dynobj;
5483 asection *sdyn;
0ff2b86e 5484 const struct elf_x86_64_backend_data *abed;
70256ad8 5485
351f65ca 5486 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 5487 if (htab == NULL)
5488 return FALSE;
5489
0ff2b86e
L		 5490 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5491 section only if there is .plt section. */
5492 abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL
5493 ? &elf_x86_64_bnd_arch_bed
5494 : get_elf_x86_64_backend_data (output_bfd));
5495
c434dee6 5496 dynobj = htab->elf.dynobj;
3d4d4302 5497 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
70256ad8 5498
c434dee6 5499 if (htab->elf.dynamic_sections_created)
70256ad8 5500 {
82e96e07
L		 5501 bfd_byte *dyncon, *dynconend;
5502 const struct elf_backend_data *bed;
5503 bfd_size_type sizeof_dyn;
70256ad8 5504
6de2ae4a 5505 if (sdyn == NULL || htab->elf.sgot == NULL)
c434dee6 5506 abort ();
70256ad8 5507
82e96e07
L		 5508 bed = get_elf_backend_data (dynobj);
5509 sizeof_dyn = bed->s->sizeof_dyn;
5510 dyncon = sdyn->contents;
5511 dynconend = sdyn->contents + sdyn->size;
5512 for (; dyncon < dynconend; dyncon += sizeof_dyn)
70256ad8
AJ		 5513 {
5514 Elf_Internal_Dyn dyn;
70256ad8
AJ		 5515 asection *s;
5516
82e96e07 5517 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
70256ad8
AJ		 5518
5519 switch (dyn.d_tag)
5520 {
5521 default:
053579d7 5522 continue;
70256ad8
AJ		 5523
5524 case DT_PLTGOT:
6de2ae4a 5525 s = htab->elf.sgotplt;
8c37241b 5526 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
c434dee6 5527 break;
70256ad8
AJ		 5528
5529 case DT_JMPREL:
6de2ae4a 5530 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
c434dee6 5531 break;
70256ad8 5532
c434dee6 5533 case DT_PLTRELSZ:
6de2ae4a 5534 s = htab->elf.srelplt->output_section;
eea6121a 5535 dyn.d_un.d_val = s->size;
70256ad8
AJ		 5536 break;
5537
5538 case DT_RELASZ:
c434dee6
AJ		 5539 /* The procedure linkage table relocs (DT_JMPREL) should
5540 not be included in the overall relocs (DT_RELA).
5541 Therefore, we override the DT_RELASZ entry here to
5542 make it not include the JMPREL relocs. Since the
5543 linker script arranges for .rela.plt to follow all
5544 other relocation sections, we don't have to worry
5545 about changing the DT_RELA entry. */
6de2ae4a 5546 if (htab->elf.srelplt != NULL)
70256ad8 5547 {
6de2ae4a 5548 s = htab->elf.srelplt->output_section;
eea6121a 5549 dyn.d_un.d_val -= s->size;
70256ad8
AJ		 5550 }
5551 break;
67a4f2b7
AO		 5552
5553 case DT_TLSDESC_PLT:
6de2ae4a 5554 s = htab->elf.splt;
67a4f2b7
AO		 5555 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5556 + htab->tlsdesc_plt;
5557 break;
5558
5559 case DT_TLSDESC_GOT:
6de2ae4a 5560 s = htab->elf.sgot;
67a4f2b7
AO		 5561 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5562 + htab->tlsdesc_got;
5563 break;
70256ad8 5564 }
c434dee6 5565
82e96e07 5566 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
70256ad8
AJ		 5567 }
5568
c434dee6 5569 /* Fill in the special first entry in the procedure linkage table. */
6de2ae4a 5570 if (htab->elf.splt && htab->elf.splt->size > 0)
70256ad8 5571 {
653165cc 5572 /* Fill in the first entry in the procedure linkage table. */
eed180f8
RM		 5573 memcpy (htab->elf.splt->contents,
5574 abed->plt0_entry, abed->plt_entry_size);
653165cc
AJ		 5575 /* Add offset for pushq GOT+8(%rip), since the instruction
5576 uses 6 bytes subtract this value. */
5577 bfd_put_32 (output_bfd,
6de2ae4a
L		 5578 (htab->elf.sgotplt->output_section->vma
5579 + htab->elf.sgotplt->output_offset
653165cc 5580 + 8
6de2ae4a
L		 5581 - htab->elf.splt->output_section->vma
5582 - htab->elf.splt->output_offset
653165cc 5583 - 6),
eed180f8
RM		 5584 htab->elf.splt->contents + abed->plt0_got1_offset);
5585 /* Add offset for the PC-relative instruction accessing GOT+16,
5586 subtracting the offset to the end of that instruction. */
653165cc 5587 bfd_put_32 (output_bfd,
6de2ae4a
L		 5588 (htab->elf.sgotplt->output_section->vma
5589 + htab->elf.sgotplt->output_offset
653165cc 5590 + 16
6de2ae4a
L		 5591 - htab->elf.splt->output_section->vma
5592 - htab->elf.splt->output_offset
eed180f8
RM		 5593 - abed->plt0_got2_insn_end),
5594 htab->elf.splt->contents + abed->plt0_got2_offset);
653165cc 5595
eed180f8
RM		 5596 elf_section_data (htab->elf.splt->output_section)
5597 ->this_hdr.sh_entsize = abed->plt_entry_size;
67a4f2b7
AO		 5598
5599 if (htab->tlsdesc_plt)
5600 {
5601 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 5602 htab->elf.sgot->contents + htab->tlsdesc_got);
67a4f2b7 5603
6de2ae4a 5604 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
eed180f8 5605 abed->plt0_entry, abed->plt_entry_size);
67a4f2b7
AO		 5606
5607 /* Add offset for pushq GOT+8(%rip), since the
5608 instruction uses 6 bytes subtract this value. */
5609 bfd_put_32 (output_bfd,
6de2ae4a
L		 5610 (htab->elf.sgotplt->output_section->vma
5611 + htab->elf.sgotplt->output_offset
67a4f2b7 5612 + 8
6de2ae4a
L		 5613 - htab->elf.splt->output_section->vma
5614 - htab->elf.splt->output_offset
67a4f2b7
AO		 5615 - htab->tlsdesc_plt
5616 - 6),
eed180f8
RM		 5617 htab->elf.splt->contents
5618 + htab->tlsdesc_plt + abed->plt0_got1_offset);
5619 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5620 where TGD stands for htab->tlsdesc_got, subtracting the offset
5621 to the end of that instruction. */
67a4f2b7 5622 bfd_put_32 (output_bfd,
6de2ae4a
L		 5623 (htab->elf.sgot->output_section->vma
5624 + htab->elf.sgot->output_offset
67a4f2b7 5625 + htab->tlsdesc_got
6de2ae4a
L		 5626 - htab->elf.splt->output_section->vma
5627 - htab->elf.splt->output_offset
67a4f2b7 5628 - htab->tlsdesc_plt
eed180f8
RM		 5629 - abed->plt0_got2_insn_end),
5630 htab->elf.splt->contents
5631 + htab->tlsdesc_plt + abed->plt0_got2_offset);
67a4f2b7 5632 }
70256ad8 5633 }
70256ad8
AJ		 5634 }
5635
0ff2b86e
L		 5636 if (htab->plt_bnd != NULL)
5637 elf_section_data (htab->plt_bnd->output_section)
5638 ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry);
5639
6de2ae4a 5640 if (htab->elf.sgotplt)
70256ad8 5641 {
56d4289c
L		 5642 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5643 {
5644 (*_bfd_error_handler)
5645 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5646 return FALSE;
5647 }
5648
c434dee6 5649 /* Fill in the first three entries in the global offset table. */
6de2ae4a 5650 if (htab->elf.sgotplt->size > 0)
c434dee6
AJ		 5651 {
5652 /* Set the first entry in the global offset table to the address of
5653 the dynamic section. */
5654 if (sdyn == NULL)
6de2ae4a 5655 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
c434dee6
AJ		 5656 else
5657 bfd_put_64 (output_bfd,
5658 sdyn->output_section->vma + sdyn->output_offset,
6de2ae4a 5659 htab->elf.sgotplt->contents);
c434dee6 5660 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6de2ae4a
L		 5661 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
5662 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
c434dee6 5663 }
70256ad8 5664
6de2ae4a 5665 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
c434dee6
AJ		 5666 GOT_ENTRY_SIZE;
5667 }
70256ad8 5668
e41b3a13 5669 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 5670 if (htab->plt_eh_frame != NULL
5671 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 5672 {
5673 if (htab->elf.splt != NULL
5674 && htab->elf.splt->size != 0
5675 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5676 && htab->elf.splt->output_section != NULL
5677 && htab->plt_eh_frame->output_section != NULL)
5678 {
5679 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5680 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5681 + htab->plt_eh_frame->output_offset
5682 + PLT_FDE_START_OFFSET;
5683 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5684 htab->plt_eh_frame->contents
5685 + PLT_FDE_START_OFFSET);
5686 }
dbaa2011 5687 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 5688 {
5689 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5690 htab->plt_eh_frame,
5691 htab->plt_eh_frame->contents))
5692 return FALSE;
5693 }
5694 }
5695
6de2ae4a
L		 5696 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5697 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
8c37241b
JJ		 5698 = GOT_ENTRY_SIZE;
5699
c25bc9fc
L		 5700 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5701 htab_traverse (htab->loc_hash_table,
351f65ca 5702 elf_x86_64_finish_local_dynamic_symbol,
c25bc9fc
L		 5703 info);
5704
b34976b6 5705 return TRUE;
8d88c4ca
NC		 5706}
5707
3972882e 5708/* Return an array of PLT entry symbol values. */
4c45e5c9 5709
3972882e
L		 5710static bfd_vma *
5711elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5712 asection *relplt)
4c45e5c9 5713{
3972882e
L		 5714 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5715 arelent *p;
5716 long count, i;
5717 bfd_vma *plt_sym_val;
144bed8d 5718 bfd_vma plt_offset;
3972882e
L		 5719 bfd_byte *plt_contents;
5720 const struct elf_x86_64_backend_data *bed;
5721 Elf_Internal_Shdr *hdr;
5722 asection *plt_bnd;
144bed8d 5723
3972882e
L		 5724 /* Get the .plt section contents. PLT passed down may point to the
5725 .plt.bnd section. Make sure that PLT always points to the .plt
5726 section. */
5727 plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd");
5728 if (plt_bnd)
5729 {
5730 if (plt != plt_bnd)
5731 abort ();
5732 plt = bfd_get_section_by_name (abfd, ".plt");
5733 if (plt == NULL)
5734 abort ();
5735 bed = &elf_x86_64_bnd_arch_bed;
5736 }
5737 else
5738 bed = get_elf_x86_64_backend_data (abfd);
cca5b8b6 5739
3972882e
L		 5740 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5741 if (plt_contents == NULL)
5742 return NULL;
5743 if (!bfd_get_section_contents (abfd, (asection *) plt,
5744 plt_contents, 0, plt->size))
144bed8d 5745 {
3972882e
L		 5746bad_return:
5747 free (plt_contents);
5748 return NULL;
144bed8d
L		 5749 }
5750
3972882e
L		 5751 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5752 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5753 goto bad_return;
144bed8d 5754
3972882e
L		 5755 hdr = &elf_section_data (relplt)->this_hdr;
5756 count = relplt->size / hdr->sh_entsize;
144bed8d 5757
3972882e
L		 5758 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5759 if (plt_sym_val == NULL)
5760 goto bad_return;
cca5b8b6 5761
35181b3e 5762 for (i = 0; i < count; i++)
3972882e 5763 plt_sym_val[i] = -1;
cca5b8b6 5764
3972882e
L		 5765 plt_offset = bed->plt_entry_size;
5766 p = relplt->relocation;
5767 for (i = 0; i < count; i++, p++)
144bed8d 5768 {
3972882e 5769 long reloc_index;
144bed8d 5770
6f25f223 5771 /* Skip unknown relocation. */
533d0af0 5772 if (p->howto == NULL)
6f25f223 5773 continue;
533d0af0 5774
3972882e
L		 5775 if (p->howto->type != R_X86_64_JUMP_SLOT
5776 && p->howto->type != R_X86_64_IRELATIVE)
5777 continue;
144bed8d 5778
3972882e
L		 5779 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5780 + bed->plt_reloc_offset));
5781 if (reloc_index >= count)
5782 abort ();
5783 if (plt_bnd)
144bed8d
L		 5784 {
5785 /* This is the index in .plt section. */
5786 long plt_index = plt_offset / bed->plt_entry_size;
3972882e
L		 5787 /* Store VMA + the offset in .plt.bnd section. */
5788 plt_sym_val[reloc_index] =
5789 (plt_bnd->vma
5790 + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry));
144bed8d 5791 }
3972882e
L		 5792 else
5793 plt_sym_val[reloc_index] = plt->vma + plt_offset;
144bed8d 5794 plt_offset += bed->plt_entry_size;
fca6ae69
L		 5795
5796 /* PR binutils/18437: Skip extra relocations in the .rela.plt
5797 section. */
5798 if (plt_offset >= plt->size)
5799 break;
144bed8d
L		 5800 }
5801
3972882e
L		 5802 free (plt_contents);
5803
5804 return plt_sym_val;
4c45e5c9 5805}
8df9fc9d 5806
0ff2b86e
L		 5807/* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5808 support. */
5809
5810static long
5811elf_x86_64_get_synthetic_symtab (bfd *abfd,
5812 long symcount,
5813 asymbol **syms,
5814 long dynsymcount,
5815 asymbol **dynsyms,
5816 asymbol **ret)
5817{
3972882e
L		 5818 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
5819 as PLT if it exists. */
5820 asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd");
0ff2b86e 5821 if (plt == NULL)
3972882e
L		 5822 plt = bfd_get_section_by_name (abfd, ".plt");
5823 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5824 dynsymcount, dynsyms, ret,
5825 plt,
5826 elf_x86_64_get_plt_sym_val);
0ff2b86e
L		 5827}
5828
d2b2c203
DJ		 5829/* Handle an x86-64 specific section when reading an object file. This
5830 is called when elfcode.h finds a section with an unknown type. */
5831
5832static bfd_boolean
0c723101
L		 5833elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
5834 const char *name, int shindex)
d2b2c203
DJ		 5835{
5836 if (hdr->sh_type != SHT_X86_64_UNWIND)
5837 return FALSE;
5838
6dc132d9 5839 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
d2b2c203
DJ		 5840 return FALSE;
5841
5842 return TRUE;
5843}
5844
3b22753a
L		 5845/* Hook called by the linker routine which adds symbols from an object
5846 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5847 of .bss. */
5848
5849static bfd_boolean
351f65ca
L		 5850elf_x86_64_add_symbol_hook (bfd *abfd,
5851 struct bfd_link_info *info,
5852 Elf_Internal_Sym *sym,
5853 const char **namep ATTRIBUTE_UNUSED,
5854 flagword *flagsp ATTRIBUTE_UNUSED,
5855 asection **secp,
5856 bfd_vma *valp)
3b22753a
L		 5857{
5858 asection *lcomm;
5859
5860 switch (sym->st_shndx)
5861 {
5862 case SHN_X86_64_LCOMMON:
5863 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
5864 if (lcomm == NULL)
5865 {
5866 lcomm = bfd_make_section_with_flags (abfd,
5867 "LARGE_COMMON",
5868 (SEC_ALLOC
5869 | SEC_IS_COMMON
5870 | SEC_LINKER_CREATED));
5871 if (lcomm == NULL)
5872 return FALSE;
5873 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
5874 }
5875 *secp = lcomm;
5876 *valp = sym->st_size;
c35bdf6e 5877 return TRUE;
3b22753a 5878 }
d8045f23 5879
13a2df29 5880 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
f1885d1e
AM		 5881 && (abfd->flags & DYNAMIC) == 0
5882 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
13a2df29
L		 5883 elf_tdata (info->output_bfd)->has_gnu_symbols
5884 |= elf_gnu_symbol_unique;
d8045f23 5885
3b22753a
L		 5886 return TRUE;
5887}
5888
5889
5890/* Given a BFD section, try to locate the corresponding ELF section
5891 index. */
5892
5893static bfd_boolean
351f65ca
L		 5894elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
5895 asection *sec, int *index_return)
3b22753a
L		 5896{
5897 if (sec == &_bfd_elf_large_com_section)
5898 {
91d6fa6a 5899 *index_return = SHN_X86_64_LCOMMON;
3b22753a
L		 5900 return TRUE;
5901 }
5902 return FALSE;
5903}
5904
5905/* Process a symbol. */
5906
5907static void
351f65ca
L		 5908elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5909 asymbol *asym)
3b22753a
L		 5910{
5911 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5912
5913 switch (elfsym->internal_elf_sym.st_shndx)
5914 {
5915 case SHN_X86_64_LCOMMON:
5916 asym->section = &_bfd_elf_large_com_section;
5917 asym->value = elfsym->internal_elf_sym.st_size;
5918 /* Common symbol doesn't set BSF_GLOBAL. */
5919 asym->flags &= ~BSF_GLOBAL;
5920 break;
5921 }
5922}
5923
5924static bfd_boolean
351f65ca 5925elf_x86_64_common_definition (Elf_Internal_Sym *sym)
3b22753a
L		 5926{
5927 return (sym->st_shndx == SHN_COMMON
5928 || sym->st_shndx == SHN_X86_64_LCOMMON);
5929}
5930
5931static unsigned int
351f65ca 5932elf_x86_64_common_section_index (asection *sec)
3b22753a
L		 5933{
5934 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5935 return SHN_COMMON;
5936 else
5937 return SHN_X86_64_LCOMMON;
5938}
5939
5940static asection *
351f65ca 5941elf_x86_64_common_section (asection *sec)
3b22753a
L		 5942{
5943 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5944 return bfd_com_section_ptr;
5945 else
5946 return &_bfd_elf_large_com_section;
5947}
5948
5949static bfd_boolean
5d13b3b3
AM		 5950elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
5951 const Elf_Internal_Sym *sym,
351f65ca 5952 asection **psec,
5d13b3b3
AM		 5953 bfd_boolean newdef,
5954 bfd_boolean olddef,
351f65ca 5955 bfd *oldbfd,
5d13b3b3 5956 const asection *oldsec)
3b22753a
L		 5957{
5958 /* A normal common symbol and a large common symbol result in a
00492999
L		 5959 normal common symbol. We turn the large common symbol into a
5960 normal one. */
5d13b3b3 5961 if (!olddef
3b22753a 5962 && h->root.type == bfd_link_hash_common
5d13b3b3
AM		 5963 && !newdef
5964 && bfd_is_com_section (*psec)
5965 && oldsec != *psec)
3b22753a 5966 {
00492999 5967 if (sym->st_shndx == SHN_COMMON
5d13b3b3 5968 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
00492999
L		 5969 {
5970 h->root.u.c.p->section
5971 = bfd_make_section_old_way (oldbfd, "COMMON");
5972 h->root.u.c.p->section->flags = SEC_ALLOC;
5973 }
5974 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5d13b3b3
AM		 5975 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
5976 *psec = bfd_com_section_ptr;
3b22753a
L		 5977 }
5978
5979 return TRUE;
5980}
5981
5982static int
351f65ca
L		 5983elf_x86_64_additional_program_headers (bfd *abfd,
5984 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3b22753a
L		 5985{
5986 asection *s;
9a2e389a 5987 int count = 0;
3b22753a
L		 5988
5989 /* Check to see if we need a large readonly segment. */
5990 s = bfd_get_section_by_name (abfd, ".lrodata");
5991 if (s && (s->flags & SEC_LOAD))
5992 count++;
5993
5994 /* Check to see if we need a large data segment. Since .lbss sections
5995 is placed right after the .bss section, there should be no need for
5996 a large data segment just because of .lbss. */
5997 s = bfd_get_section_by_name (abfd, ".ldata");
5998 if (s && (s->flags & SEC_LOAD))
5999 count++;
6000
6001 return count;
6002}
6003
fdc90cb4
JJ		 6004/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6005
6006static bfd_boolean
351f65ca 6007elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
fdc90cb4
JJ		 6008{
6009 if (h->plt.offset != (bfd_vma) -1
6010 && !h->def_regular
6011 && !h->pointer_equality_needed)
6012 return FALSE;
6013
6014 return _bfd_elf_hash_symbol (h);
6015}
6016
c543bf9a
L		 6017/* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
6018
6019static bfd_boolean
6020elf_x86_64_relocs_compatible (const bfd_target *input,
6021 const bfd_target *output)
6022{
6023 return ((xvec_get_elf_backend_data (input)->s->elfclass
6024 == xvec_get_elf_backend_data (output)->s->elfclass)
6025 && _bfd_elf_relocs_compatible (input, output));
6026}
6027
9a2e389a 6028static const struct bfd_elf_special_section
351f65ca 6029 elf_x86_64_special_sections[]=
3b22753a 6030{
0112cd26
NC		 6031 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6032 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6033 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
6034 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6035 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6036 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6037 { NULL, 0, 0, 0, 0 }
3b22753a
L		 6038};
6039
6d00b590 6040#define TARGET_LITTLE_SYM x86_64_elf64_vec
70256ad8
AJ		 6041#define TARGET_LITTLE_NAME "elf64-x86-64"
6042#define ELF_ARCH bfd_arch_i386
ae95ffa6 6043#define ELF_TARGET_ID X86_64_ELF_DATA
70256ad8 6044#define ELF_MACHINE_CODE EM_X86_64
f7661549 6045#define ELF_MAXPAGESIZE 0x200000
2043964e 6046#define ELF_MINPAGESIZE 0x1000
24718e3b 6047#define ELF_COMMONPAGESIZE 0x1000
70256ad8
AJ		 6048
6049#define elf_backend_can_gc_sections 1
51b64d56 6050#define elf_backend_can_refcount 1
70256ad8
AJ		 6051#define elf_backend_want_got_plt 1
6052#define elf_backend_plt_readonly 1
6053#define elf_backend_want_plt_sym 0
6054#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 6055#define elf_backend_rela_normal 1
e41b3a13 6056#define elf_backend_plt_alignment 4
f7483970 6057#define elf_backend_extern_protected_data 1
70256ad8 6058
351f65ca 6059#define elf_info_to_howto elf_x86_64_info_to_howto
70256ad8 6060
70256ad8 6061#define bfd_elf64_bfd_link_hash_table_create \
351f65ca 6062 elf_x86_64_link_hash_table_create
351f65ca 6063#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
157090f7 6064#define bfd_elf64_bfd_reloc_name_lookup \
351f65ca 6065 elf_x86_64_reloc_name_lookup
70256ad8 6066
351f65ca 6067#define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
c543bf9a 6068#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
351f65ca
L		 6069#define elf_backend_check_relocs elf_x86_64_check_relocs
6070#define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
6071#define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
6072#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6073#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6074#define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
6075#define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
6076#define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6077#define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
8fd79e71
L		 6078#ifdef CORE_HEADER
6079#define elf_backend_write_core_note elf_x86_64_write_core_note
6080#endif
351f65ca
L		 6081#define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6082#define elf_backend_relocate_section elf_x86_64_relocate_section
6083#define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6084#define elf_backend_always_size_sections elf_x86_64_always_size_sections
74541ad4 6085#define elf_backend_init_index_section _bfd_elf_init_1_index_section
407443a3 6086#define elf_backend_object_p elf64_x86_64_elf_object_p
351f65ca 6087#define bfd_elf64_mkobject elf_x86_64_mkobject
0ff2b86e 6088#define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
8d88c4ca 6089
d2b2c203 6090#define elf_backend_section_from_shdr \
351f65ca 6091 elf_x86_64_section_from_shdr
d2b2c203 6092
3b22753a 6093#define elf_backend_section_from_bfd_section \
351f65ca 6094 elf_x86_64_elf_section_from_bfd_section
3b22753a 6095#define elf_backend_add_symbol_hook \
351f65ca 6096 elf_x86_64_add_symbol_hook
3b22753a 6097#define elf_backend_symbol_processing \
351f65ca 6098 elf_x86_64_symbol_processing
3b22753a 6099#define elf_backend_common_section_index \
351f65ca 6100 elf_x86_64_common_section_index
3b22753a 6101#define elf_backend_common_section \
351f65ca 6102 elf_x86_64_common_section
3b22753a 6103#define elf_backend_common_definition \
351f65ca 6104 elf_x86_64_common_definition
3b22753a 6105#define elf_backend_merge_symbol \
351f65ca 6106 elf_x86_64_merge_symbol
3b22753a 6107#define elf_backend_special_sections \
351f65ca 6108 elf_x86_64_special_sections
3b22753a 6109#define elf_backend_additional_program_headers \
351f65ca 6110 elf_x86_64_additional_program_headers
fdc90cb4 6111#define elf_backend_hash_symbol \
351f65ca 6112 elf_x86_64_hash_symbol
3b22753a 6113
8d88c4ca 6114#include "elf64-target.h"
9d7cbccd 6115
6036f486
ES		 6116/* CloudABI support. */
6117
6118#undef TARGET_LITTLE_SYM
6119#define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6120#undef TARGET_LITTLE_NAME
6121#define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6122
6123#undef ELF_OSABI
6124#define ELF_OSABI ELFOSABI_CLOUDABI
6125
6126#undef elf64_bed
6127#define elf64_bed elf64_x86_64_cloudabi_bed
6128
6129#include "elf64-target.h"
6130
9d7cbccd
NC		 6131/* FreeBSD support. */
6132
6133#undef TARGET_LITTLE_SYM
6d00b590 6134#define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
9d7cbccd
NC		 6135#undef TARGET_LITTLE_NAME
6136#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6137
d1036acb
L		 6138#undef ELF_OSABI
6139#define ELF_OSABI ELFOSABI_FREEBSD
9d7cbccd 6140
9d7cbccd
NC		 6141#undef elf64_bed
6142#define elf64_bed elf64_x86_64_fbsd_bed
6143
6144#include "elf64-target.h"
8a9036a4 6145
a6cc6b3b
RO		 6146/* Solaris 2 support. */
6147
6148#undef TARGET_LITTLE_SYM
6d00b590 6149#define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
a6cc6b3b
RO		 6150#undef TARGET_LITTLE_NAME
6151#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6152
6153/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6154 objects won't be recognized. */
6155#undef ELF_OSABI
6156
6157#undef elf64_bed
6158#define elf64_bed elf64_x86_64_sol2_bed
6159
7dc98aea
RO		 6160/* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6161 boundary. */
6162#undef elf_backend_static_tls_alignment
6163#define elf_backend_static_tls_alignment 16
6164
a6cc6b3b
RO		 6165/* The Solaris 2 ABI requires a plt symbol on all platforms.
6166
6167 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6168 File, p.63. */
6169#undef elf_backend_want_plt_sym
6170#define elf_backend_want_plt_sym 1
6171
6172#include "elf64-target.h"
6173
8059fb19
RM		 6174/* Native Client support. */
6175
64b384e1
RM		 6176static bfd_boolean
6177elf64_x86_64_nacl_elf_object_p (bfd *abfd)
6178{
6179 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6180 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
6181 return TRUE;
6182}
6183
8059fb19 6184#undef TARGET_LITTLE_SYM
6d00b590 6185#define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
8059fb19
RM		 6186#undef TARGET_LITTLE_NAME
6187#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6188#undef elf64_bed
6189#define elf64_bed elf64_x86_64_nacl_bed
6190
6191#undef ELF_MAXPAGESIZE
6192#undef ELF_MINPAGESIZE
6193#undef ELF_COMMONPAGESIZE
6194#define ELF_MAXPAGESIZE 0x10000
6195#define ELF_MINPAGESIZE 0x10000
6196#define ELF_COMMONPAGESIZE 0x10000
6197
6198/* Restore defaults. */
6199#undef ELF_OSABI
6200#undef elf_backend_static_tls_alignment
6201#undef elf_backend_want_plt_sym
6202#define elf_backend_want_plt_sym 0
6203
6204/* NaCl uses substantially different PLT entries for the same effects. */
6205
6206#undef elf_backend_plt_alignment
6207#define elf_backend_plt_alignment 5
6208#define NACL_PLT_ENTRY_SIZE 64
6209#define NACLMASK 0xe0 /* 32-byte alignment mask. */
6210
6211static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
6212 {
6213 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6214 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6215 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6216 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6217 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6218
ea2d813e 6219 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
70cc877f 6220 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
ea2d813e
RM		 6221
6222 /* 32 bytes of nop to pad out to the standard size. */
8059fb19
RM		 6223 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6224 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6225 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6226 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
ea2d813e
RM		 6227 0x66, /* excess data32 prefix */
6228 0x90 /* nop */
8059fb19
RM		 6229 };
6230
6231static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6232 {
6233 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6234 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6235 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6236 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6237
6238 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6239 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6240 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6241
6242 /* Lazy GOT entries point here (32-byte aligned). */
6243 0x68, /* pushq immediate */
6244 0, 0, 0, 0, /* replaced with index into relocation table. */
6245 0xe9, /* jmp relative */
6246 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6247
6248 /* 22 bytes of nop to pad out to the standard size. */
6249 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6250 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6251 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6252 };
6253
6254/* .eh_frame covering the .plt section. */
6255
6256static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
6257 {
6258#if (PLT_CIE_LENGTH != 20 \
6259 || PLT_FDE_LENGTH != 36 \
6260 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6261 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6262# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6263#endif
6264 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6265 0, 0, 0, 0, /* CIE ID */
6266 1, /* CIE version */
6267 'z', 'R', 0, /* Augmentation string */
6268 1, /* Code alignment factor */
6269 0x78, /* Data alignment factor */
6270 16, /* Return address column */
6271 1, /* Augmentation size */
6272 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6273 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6274 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6275 DW_CFA_nop, DW_CFA_nop,
6276
6277 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6278 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
6279 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6280 0, 0, 0, 0, /* .plt size goes here */
6281 0, /* Augmentation size */
6282 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
6283 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6284 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
6285 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6286 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6287 13, /* Block length */
6288 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
6289 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
6290 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6291 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
6292 DW_CFA_nop, DW_CFA_nop
6293 };
6294
6295static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
6296 {
6297 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
6298 elf_x86_64_nacl_plt_entry, /* plt_entry */
6299 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6300 2, /* plt0_got1_offset */
6301 9, /* plt0_got2_offset */
6302 13, /* plt0_got2_insn_end */
6303 3, /* plt_got_offset */
6304 33, /* plt_reloc_offset */
6305 38, /* plt_plt_offset */
6306 7, /* plt_got_insn_size */
6307 42, /* plt_plt_insn_end */
6308 32, /* plt_lazy_offset */
6309 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
6310 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
6311 };
6312
6313#undef elf_backend_arch_data
6314#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6315
64b384e1
RM		 6316#undef elf_backend_object_p
6317#define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5a68afcf
RM		 6318#undef elf_backend_modify_segment_map
6319#define elf_backend_modify_segment_map nacl_modify_segment_map
6320#undef elf_backend_modify_program_headers
6321#define elf_backend_modify_program_headers nacl_modify_program_headers
887badb3
RM		 6322#undef elf_backend_final_write_processing
6323#define elf_backend_final_write_processing nacl_final_write_processing
5a68afcf 6324
8059fb19
RM		 6325#include "elf64-target.h"
6326
6327/* Native Client x32 support. */
6328
64b384e1
RM		 6329static bfd_boolean
6330elf32_x86_64_nacl_elf_object_p (bfd *abfd)
6331{
6332 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6333 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
6334 return TRUE;
6335}
6336
8059fb19 6337#undef TARGET_LITTLE_SYM
6d00b590 6338#define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
8059fb19
RM		 6339#undef TARGET_LITTLE_NAME
6340#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6341#undef elf32_bed
6342#define elf32_bed elf32_x86_64_nacl_bed
6343
6344#define bfd_elf32_bfd_link_hash_table_create \
6345 elf_x86_64_link_hash_table_create
8059fb19
RM		 6346#define bfd_elf32_bfd_reloc_type_lookup \
6347 elf_x86_64_reloc_type_lookup
6348#define bfd_elf32_bfd_reloc_name_lookup \
6349 elf_x86_64_reloc_name_lookup
6350#define bfd_elf32_mkobject \
6351 elf_x86_64_mkobject
b7365e5d
L		 6352#define bfd_elf32_get_synthetic_symtab \
6353 elf_x86_64_get_synthetic_symtab
8059fb19
RM		 6354
6355#undef elf_backend_object_p
6356#define elf_backend_object_p \
64b384e1 6357 elf32_x86_64_nacl_elf_object_p
8059fb19
RM		 6358
6359#undef elf_backend_bfd_from_remote_memory
6360#define elf_backend_bfd_from_remote_memory \
6361 _bfd_elf32_bfd_from_remote_memory
6362
6363#undef elf_backend_size_info
6364#define elf_backend_size_info \
6365 _bfd_elf32_size_info
6366
6367#include "elf32-target.h"
6368
6369/* Restore defaults. */
5a68afcf 6370#undef elf_backend_object_p
8059fb19 6371#define elf_backend_object_p elf64_x86_64_elf_object_p
5a68afcf
RM		 6372#undef elf_backend_bfd_from_remote_memory
6373#undef elf_backend_size_info
6374#undef elf_backend_modify_segment_map
6375#undef elf_backend_modify_program_headers
887badb3 6376#undef elf_backend_final_write_processing
8059fb19 6377
8a9036a4
L		 6378/* Intel L1OM support. */
6379
6380static bfd_boolean
6381elf64_l1om_elf_object_p (bfd *abfd)
6382{
6383 /* Set the right machine number for an L1OM elf64 file. */
6384 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
6385 return TRUE;
6386}
6387
6388#undef TARGET_LITTLE_SYM
6d00b590 6389#define TARGET_LITTLE_SYM l1om_elf64_vec
8a9036a4
L		 6390#undef TARGET_LITTLE_NAME
6391#define TARGET_LITTLE_NAME "elf64-l1om"
6392#undef ELF_ARCH
6393#define ELF_ARCH bfd_arch_l1om
6394
6395#undef ELF_MACHINE_CODE
6396#define ELF_MACHINE_CODE EM_L1OM
6397
6398#undef ELF_OSABI
6399
6400#undef elf64_bed
6401#define elf64_bed elf64_l1om_bed
6402
6403#undef elf_backend_object_p
6404#define elf_backend_object_p elf64_l1om_elf_object_p
6405
8059fb19
RM		 6406/* Restore defaults. */
6407#undef ELF_MAXPAGESIZE
6408#undef ELF_MINPAGESIZE
6409#undef ELF_COMMONPAGESIZE
6410#define ELF_MAXPAGESIZE 0x200000
6411#define ELF_MINPAGESIZE 0x1000
6412#define ELF_COMMONPAGESIZE 0x1000
6413#undef elf_backend_plt_alignment
6414#define elf_backend_plt_alignment 4
6415#undef elf_backend_arch_data
6416#define elf_backend_arch_data &elf_x86_64_arch_bed
1a0c107f 6417
8a9036a4
L		 6418#include "elf64-target.h"
6419
6420/* FreeBSD L1OM support. */
6421
6422#undef TARGET_LITTLE_SYM
6d00b590 6423#define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
8a9036a4
L		 6424#undef TARGET_LITTLE_NAME
6425#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6426
6427#undef ELF_OSABI
6428#define ELF_OSABI ELFOSABI_FREEBSD
6429
6430#undef elf64_bed
6431#define elf64_bed elf64_l1om_fbsd_bed
6432
8a9036a4 6433#include "elf64-target.h"
351f65ca 6434
7a9068fe
L		 6435/* Intel K1OM support. */
6436
6437static bfd_boolean
6438elf64_k1om_elf_object_p (bfd *abfd)
6439{
6440 /* Set the right machine number for an K1OM elf64 file. */
6441 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
6442 return TRUE;
6443}
6444
6445#undef TARGET_LITTLE_SYM
6d00b590 6446#define TARGET_LITTLE_SYM k1om_elf64_vec
7a9068fe
L		 6447#undef TARGET_LITTLE_NAME
6448#define TARGET_LITTLE_NAME "elf64-k1om"
6449#undef ELF_ARCH
6450#define ELF_ARCH bfd_arch_k1om
6451
6452#undef ELF_MACHINE_CODE
6453#define ELF_MACHINE_CODE EM_K1OM
6454
6455#undef ELF_OSABI
6456
6457#undef elf64_bed
6458#define elf64_bed elf64_k1om_bed
6459
6460#undef elf_backend_object_p
6461#define elf_backend_object_p elf64_k1om_elf_object_p
6462
6463#undef elf_backend_static_tls_alignment
6464
6465#undef elf_backend_want_plt_sym
6466#define elf_backend_want_plt_sym 0
6467
6468#include "elf64-target.h"
6469
6470/* FreeBSD K1OM support. */
6471
6472#undef TARGET_LITTLE_SYM
6d00b590 6473#define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
7a9068fe
L		 6474#undef TARGET_LITTLE_NAME
6475#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6476
6477#undef ELF_OSABI
6478#define ELF_OSABI ELFOSABI_FREEBSD
6479
6480#undef elf64_bed
6481#define elf64_bed elf64_k1om_fbsd_bed
6482
6483#include "elf64-target.h"
6484
351f65ca
L		 6485/* 32bit x86-64 support. */
6486
351f65ca 6487#undef TARGET_LITTLE_SYM
6d00b590 6488#define TARGET_LITTLE_SYM x86_64_elf32_vec
351f65ca
L		 6489#undef TARGET_LITTLE_NAME
6490#define TARGET_LITTLE_NAME "elf32-x86-64"
8059fb19 6491#undef elf32_bed
351f65ca
L		 6492
6493#undef ELF_ARCH
6494#define ELF_ARCH bfd_arch_i386
6495
6496#undef ELF_MACHINE_CODE
6497#define ELF_MACHINE_CODE EM_X86_64
6498
351f65ca
L		 6499#undef ELF_OSABI
6500
351f65ca
L		 6501#undef elf_backend_object_p
6502#define elf_backend_object_p \
6503 elf32_x86_64_elf_object_p
6504
6505#undef elf_backend_bfd_from_remote_memory
6506#define elf_backend_bfd_from_remote_memory \
6507 _bfd_elf32_bfd_from_remote_memory
6508
6509#undef elf_backend_size_info
6510#define elf_backend_size_info \
6511 _bfd_elf32_size_info
6512
6513#include "elf32-target.h"
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