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Add Linux/x86_64 core support to i[3-7]86-*-linux
[deliverable/binutils-gdb.git] / bfd / elf64-x86-64.c
CommitLineData
351f65ca 1/* X86-64 specific support for ELF
4dfe6ac6 2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3ce231f8 3 2010, 2011, 2012
9f973f28 4 Free Software Foundation, Inc.
8d88c4ca
NC		 5 Contributed by Jan Hubicka <jh@suse.cz>.
6
ae9a127f 7 This file is part of BFD, the Binary File Descriptor library.
8d88c4ca 8
ae9a127f
NC		 9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
cd123cb7 11 the Free Software Foundation; either version 3 of the License, or
ae9a127f 12 (at your option) any later version.
8d88c4ca 13
ae9a127f
NC		 14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
8d88c4ca 18
ae9a127f
NC		 19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
cd123cb7
NC		 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
8d88c4ca 23
8d88c4ca 24#include "sysdep.h"
3db64b00 25#include "bfd.h"
c434dee6 26#include "bfdlink.h"
8d88c4ca
NC		 27#include "libbfd.h"
28#include "elf-bfd.h"
5a68afcf 29#include "elf-nacl.h"
142411ca 30#include "bfd_stdint.h"
c25bc9fc
L		 31#include "objalloc.h"
32#include "hashtab.h"
e41b3a13 33#include "dwarf2.h"
d7921315 34#include "libiberty.h"
8d88c4ca
NC		 35
36#include "elf/x86-64.h"
37
8fd79e71
L		 38#ifdef CORE_HEADER
39#include <stdarg.h>
40#include CORE_HEADER
41#endif
42
8d88c4ca
NC		 43/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
44#define MINUS_ONE (~ (bfd_vma) 0)
45
351f65ca
L		 46/* Since both 32-bit and 64-bit x86-64 encode relocation type in the
47 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
48 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
49 since they are the same. */
50
51#define ABI_64_P(abfd) \
52 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
53
8d88c4ca 54/* The relocation "howto" table. Order of fields:
7b81dfbb
AJ		 55 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
56 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
70256ad8
AJ		 57static reloc_howto_type x86_64_elf_howto_table[] =
58{
b34976b6
AM		 59 HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont,
60 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
61 FALSE),
62 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
64 FALSE),
65 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
66 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
67 TRUE),
68 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
69 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
70 FALSE),
71 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
72 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
73 TRUE),
74 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
76 FALSE),
77 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
79 MINUS_ONE, FALSE),
80 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
82 MINUS_ONE, FALSE),
83 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
85 MINUS_ONE, FALSE),
86 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
87 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
88 0xffffffff, TRUE),
89 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
90 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
91 FALSE),
92 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
93 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
94 FALSE),
95 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
b0360d8c 97 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
b34976b6 98 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
ac2aa337 99 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
b34976b6
AM		 100 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
101 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
102 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
103 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
105 MINUS_ONE, FALSE),
106 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
108 MINUS_ONE, FALSE),
109 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
111 MINUS_ONE, FALSE),
112 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
113 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
114 0xffffffff, TRUE),
115 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
116 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
117 0xffffffff, TRUE),
ac2aa337 118 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
b34976b6
AM		 119 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
120 0xffffffff, FALSE),
121 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
122 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
123 0xffffffff, TRUE),
124 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
125 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
126 0xffffffff, FALSE),
d6ab8113
JB		 127 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
129 TRUE),
130 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
132 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
133 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
134 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
135 FALSE, 0xffffffff, 0xffffffff, TRUE),
7b81dfbb
AJ		 136 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
137 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
138 FALSE),
139 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
140 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
141 MINUS_ONE, TRUE),
142 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
143 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
144 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
145 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
146 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
147 MINUS_ONE, FALSE),
148 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
149 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
150 MINUS_ONE, FALSE),
67a4f2b7
AO		 151 EMPTY_HOWTO (32),
152 EMPTY_HOWTO (33),
153 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
154 complain_overflow_bitfield, bfd_elf_generic_reloc,
155 "R_X86_64_GOTPC32_TLSDESC",
156 FALSE, 0xffffffff, 0xffffffff, TRUE),
157 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
158 complain_overflow_dont, bfd_elf_generic_reloc,
159 "R_X86_64_TLSDESC_CALL",
160 FALSE, 0, 0, FALSE),
161 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
162 complain_overflow_bitfield, bfd_elf_generic_reloc,
163 "R_X86_64_TLSDESC",
164 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
cbe950e9
L		 165 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
167 MINUS_ONE, FALSE),
64d25c44
L		 168 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
170 MINUS_ONE, FALSE),
fe4770f4 171
a33d77bc
JB		 172 /* We have a gap in the reloc numbers here.
173 R_X86_64_standard counts the number up to this point, and
174 R_X86_64_vt_offset is the value to subtract from a reloc type of
175 R_X86_64_GNU_VT* to form an index into this table. */
cbe950e9 176#define R_X86_64_standard (R_X86_64_IRELATIVE + 1)
a33d77bc
JB		 177#define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
178
fe4770f4 179/* GNU extension to record C++ vtable hierarchy. */
b34976b6
AM		 180 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
181 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
fe4770f4
AJ		 182
183/* GNU extension to record C++ vtable member usage. */
b34976b6
AM		 184 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
185 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
d7921315
L		 186 FALSE),
187
188/* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
189 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
190 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
191 FALSE)
8d88c4ca
NC		 192};
193
d8045f23
NC		 194#define IS_X86_64_PCREL_TYPE(TYPE) \
195 ( ((TYPE) == R_X86_64_PC8) \
196 || ((TYPE) == R_X86_64_PC16) \
197 || ((TYPE) == R_X86_64_PC32) \
198 || ((TYPE) == R_X86_64_PC64))
199
8d88c4ca 200/* Map BFD relocs to the x86_64 elf relocs. */
70256ad8
AJ		 201struct elf_reloc_map
202{
8d88c4ca
NC		 203 bfd_reloc_code_real_type bfd_reloc_val;
204 unsigned char elf_reloc_val;
205};
206
dc810e39 207static const struct elf_reloc_map x86_64_reloc_map[] =
8d88c4ca 208{
70256ad8
AJ		 209 { BFD_RELOC_NONE, R_X86_64_NONE, },
210 { BFD_RELOC_64, R_X86_64_64, },
211 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
212 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
213 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
214 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
215 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
216 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
217 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
218 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
219 { BFD_RELOC_32, R_X86_64_32, },
220 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
221 { BFD_RELOC_16, R_X86_64_16, },
222 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
223 { BFD_RELOC_8, R_X86_64_8, },
224 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
bffbf940
JJ		 225 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
226 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
227 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
228 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
229 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
230 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
231 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
232 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
d6ab8113
JB		 233 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
234 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
235 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
7b81dfbb
AJ		 236 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
237 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
238 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
239 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
240 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
67a4f2b7
AO		 241 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
242 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
243 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
cbe950e9 244 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
fe4770f4
AJ		 245 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
246 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
8d88c4ca
NC		 247};
248
67a4f2b7 249static reloc_howto_type *
351f65ca 250elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
67a4f2b7
AO		 251{
252 unsigned i;
253
d7921315
L		 254 if (r_type == (unsigned int) R_X86_64_32)
255 {
256 if (ABI_64_P (abfd))
257 i = r_type;
258 else
259 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
260 }
261 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
262 || r_type >= (unsigned int) R_X86_64_max)
67a4f2b7
AO		 263 {
264 if (r_type >= (unsigned int) R_X86_64_standard)
265 {
266 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
267 abfd, (int) r_type);
268 r_type = R_X86_64_NONE;
269 }
270 i = r_type;
271 }
272 else
273 i = r_type - (unsigned int) R_X86_64_vt_offset;
274 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
275 return &x86_64_elf_howto_table[i];
276}
8d88c4ca
NC		 277
278/* Given a BFD reloc type, return a HOWTO structure. */
279static reloc_howto_type *
351f65ca
L		 280elf_x86_64_reloc_type_lookup (bfd *abfd,
281 bfd_reloc_code_real_type code)
8d88c4ca
NC		 282{
283 unsigned int i;
27482721 284
8d88c4ca
NC		 285 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
286 i++)
287 {
288 if (x86_64_reloc_map[i].bfd_reloc_val == code)
351f65ca
L		 289 return elf_x86_64_rtype_to_howto (abfd,
290 x86_64_reloc_map[i].elf_reloc_val);
8d88c4ca
NC		 291 }
292 return 0;
293}
294
157090f7 295static reloc_howto_type *
d7921315 296elf_x86_64_reloc_name_lookup (bfd *abfd,
351f65ca 297 const char *r_name)
157090f7
AM		 298{
299 unsigned int i;
300
d7921315
L		 301 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
302 {
303 /* Get x32 R_X86_64_32. */
304 reloc_howto_type *reloc
305 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
306 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
307 return reloc;
308 }
309
310 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
157090f7
AM		 311 if (x86_64_elf_howto_table[i].name != NULL
312 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
313 return &x86_64_elf_howto_table[i];
314
315 return NULL;
316}
317
8d88c4ca 318/* Given an x86_64 ELF reloc type, fill in an arelent structure. */
8da6118f 319
8d88c4ca 320static void
351f65ca
L		 321elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
322 Elf_Internal_Rela *dst)
8d88c4ca 323{
67a4f2b7 324 unsigned r_type;
8d88c4ca 325
351f65ca
L		 326 r_type = ELF32_R_TYPE (dst->r_info);
327 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
8d88c4ca
NC		 328 BFD_ASSERT (r_type == cache_ptr->howto->type);
329}
70256ad8 330\f
3bab7989 331/* Support for core dump NOTE sections. */
b34976b6 332static bfd_boolean
351f65ca 333elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 334{
335 int offset;
eea6121a 336 size_t size;
3bab7989
ML		 337
338 switch (note->descsz)
339 {
340 default:
b34976b6 341 return FALSE;
3bab7989 342
bcd823f1
L		 343 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
344 /* pr_cursig */
345 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
346
347 /* pr_pid */
348 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
349
350 /* pr_reg */
351 offset = 72;
352 size = 216;
353
354 break;
355
3bab7989
ML		 356 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
357 /* pr_cursig */
cedb70c5 358 elf_tdata (abfd)->core_signal
3bab7989
ML		 359 = bfd_get_16 (abfd, note->descdata + 12);
360
361 /* pr_pid */
261b8d08 362 elf_tdata (abfd)->core_lwpid
3bab7989
ML		 363 = bfd_get_32 (abfd, note->descdata + 32);
364
365 /* pr_reg */
366 offset = 112;
eea6121a 367 size = 216;
3bab7989
ML		 368
369 break;
370 }
371
372 /* Make a ".reg/999" section. */
373 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 374 size, note->descpos + offset);
3bab7989
ML		 375}
376
b34976b6 377static bfd_boolean
351f65ca 378elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 379{
380 switch (note->descsz)
381 {
382 default:
b34976b6 383 return FALSE;
3bab7989 384
bcd823f1
L		 385 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
386 elf_tdata (abfd)->core_pid
387 = bfd_get_32 (abfd, note->descdata + 12);
388 elf_tdata (abfd)->core_program
389 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
390 elf_tdata (abfd)->core_command
391 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
392 break;
393
3bab7989 394 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
261b8d08
PA		 395 elf_tdata (abfd)->core_pid
396 = bfd_get_32 (abfd, note->descdata + 24);
3bab7989
ML		 397 elf_tdata (abfd)->core_program
398 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
399 elf_tdata (abfd)->core_command
400 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
401 }
402
403 /* Note that for some reason, a spurious space is tacked
404 onto the end of the args in some (at least one anyway)
405 implementations, so strip it off if it exists. */
406
407 {
408 char *command = elf_tdata (abfd)->core_command;
409 int n = strlen (command);
410
411 if (0 < n && command[n - 1] == ' ')
412 command[n - 1] = '\0';
413 }
414
b34976b6 415 return TRUE;
3bab7989 416}
8fd79e71
L		 417
418#ifdef CORE_HEADER
419static char *
420elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
421 int note_type, ...)
422{
423 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8fd79e71
L		 424 va_list ap;
425 const char *fname, *psargs;
426 long pid;
427 int cursig;
428 const void *gregs;
429
430 switch (note_type)
431 {
432 default:
433 return NULL;
434
435 case NT_PRPSINFO:
436 va_start (ap, note_type);
437 fname = va_arg (ap, const char *);
438 psargs = va_arg (ap, const char *);
439 va_end (ap);
440
441 if (bed->s->elfclass == ELFCLASS32)
442 {
443 prpsinfo32_t data;
444 memset (&data, 0, sizeof (data));
445 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
446 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK		 447 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
448 &data, sizeof (data));
8fd79e71
L		 449 }
450 else
451 {
b1bd052d 452 prpsinfo64_t data;
8fd79e71
L		 453 memset (&data, 0, sizeof (data));
454 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
455 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK		 456 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
457 &data, sizeof (data));
8fd79e71 458 }
e85c6a70 459 /* NOTREACHED */
8fd79e71
L		 460
461 case NT_PRSTATUS:
462 va_start (ap, note_type);
463 pid = va_arg (ap, long);
464 cursig = va_arg (ap, int);
465 gregs = va_arg (ap, const void *);
466 va_end (ap);
467
468 if (bed->s->elfclass == ELFCLASS32)
469 {
470 if (bed->elf_machine_code == EM_X86_64)
471 {
472 prstatusx32_t prstat;
473 memset (&prstat, 0, sizeof (prstat));
474 prstat.pr_pid = pid;
475 prstat.pr_cursig = cursig;
476 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 477 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
478 &prstat, sizeof (prstat));
8fd79e71
L		 479 }
480 else
481 {
482 prstatus32_t prstat;
483 memset (&prstat, 0, sizeof (prstat));
484 prstat.pr_pid = pid;
485 prstat.pr_cursig = cursig;
486 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 487 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
488 &prstat, sizeof (prstat));
8fd79e71
L		 489 }
490 }
491 else
492 {
b1bd052d 493 prstatus64_t prstat;
8fd79e71
L		 494 memset (&prstat, 0, sizeof (prstat));
495 prstat.pr_pid = pid;
496 prstat.pr_cursig = cursig;
497 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 498 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
499 &prstat, sizeof (prstat));
8fd79e71 500 }
8fd79e71 501 }
e85c6a70 502 /* NOTREACHED */
8fd79e71
L		 503}
504#endif
3bab7989 505\f
407443a3 506/* Functions for the x86-64 ELF linker. */
70256ad8 507
407443a3 508/* The name of the dynamic interpreter. This is put in the .interp
70256ad8
AJ		 509 section. */
510
351f65ca 511#define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
eec9dd95 512#define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
70256ad8 513
d40d037c
AJ		 514/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
515 copying dynamic variables from a shared lib into an app's dynbss
516 section, and instead use a dynamic relocation to point into the
517 shared lib. */
518#define ELIMINATE_COPY_RELOCS 1
519
70256ad8
AJ		 520/* The size in bytes of an entry in the global offset table. */
521
522#define GOT_ENTRY_SIZE 8
8d88c4ca 523
70256ad8 524/* The size in bytes of an entry in the procedure linkage table. */
8d88c4ca 525
70256ad8
AJ		 526#define PLT_ENTRY_SIZE 16
527
528/* The first entry in a procedure linkage table looks like this. See the
529 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
530
351f65ca 531static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
70256ad8 532{
653165cc
AJ		 533 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
534 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
10efb593 535 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
70256ad8
AJ		 536};
537
538/* Subsequent entries in a procedure linkage table look like this. */
539
351f65ca 540static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
70256ad8 541{
653165cc 542 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
407443a3 543 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653165cc 544 0x68, /* pushq immediate */
70256ad8
AJ		 545 0, 0, 0, 0, /* replaced with index into relocation table. */
546 0xe9, /* jmp relative */
547 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
548};
549
e41b3a13
JJ		 550/* .eh_frame covering the .plt section. */
551
552static const bfd_byte elf_x86_64_eh_frame_plt[] =
553{
554#define PLT_CIE_LENGTH 20
555#define PLT_FDE_LENGTH 36
556#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
557#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
558 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
559 0, 0, 0, 0, /* CIE ID */
560 1, /* CIE version */
561 'z', 'R', 0, /* Augmentation string */
562 1, /* Code alignment factor */
563 0x78, /* Data alignment factor */
564 16, /* Return address column */
565 1, /* Augmentation size */
566 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
567 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
568 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
569 DW_CFA_nop, DW_CFA_nop,
570
571 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
572 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
573 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
574 0, 0, 0, 0, /* .plt size goes here */
575 0, /* Augmentation size */
576 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
577 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
578 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
579 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
580 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
581 11, /* Block length */
582 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
583 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
584 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
585 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
586 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
587};
588
eed180f8
RM		 589/* Architecture-specific backend data for x86-64. */
590
591struct elf_x86_64_backend_data
592{
593 /* Templates for the initial PLT entry and for subsequent entries. */
594 const bfd_byte *plt0_entry;
595 const bfd_byte *plt_entry;
596 unsigned int plt_entry_size; /* Size of each PLT entry. */
597
598 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
599 unsigned int plt0_got1_offset;
600 unsigned int plt0_got2_offset;
601
602 /* Offset of the end of the PC-relative instruction containing
603 plt0_got2_offset. */
604 unsigned int plt0_got2_insn_end;
605
606 /* Offsets into plt_entry that are to be replaced with... */
607 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
608 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
609 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
610
611 /* Length of the PC-relative instruction containing plt_got_offset. */
612 unsigned int plt_got_insn_size;
613
614 /* Offset of the end of the PC-relative jump to plt0_entry. */
615 unsigned int plt_plt_insn_end;
616
617 /* Offset into plt_entry where the initial value of the GOT entry points. */
618 unsigned int plt_lazy_offset;
619
620 /* .eh_frame covering the .plt section. */
621 const bfd_byte *eh_frame_plt;
622 unsigned int eh_frame_plt_size;
623};
624
625#define get_elf_x86_64_backend_data(abfd) \
626 ((const struct elf_x86_64_backend_data *) \
627 get_elf_backend_data (abfd)->arch_data)
628
629#define GET_PLT_ENTRY_SIZE(abfd) \
630 get_elf_x86_64_backend_data (abfd)->plt_entry_size
631
632/* These are the standard parameters. */
633static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
634 {
635 elf_x86_64_plt0_entry, /* plt0_entry */
636 elf_x86_64_plt_entry, /* plt_entry */
637 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
638 2, /* plt0_got1_offset */
639 8, /* plt0_got2_offset */
640 12, /* plt0_got2_insn_end */
641 2, /* plt_got_offset */
642 7, /* plt_reloc_offset */
643 12, /* plt_plt_offset */
644 6, /* plt_got_insn_size */
645 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
646 6, /* plt_lazy_offset */
647 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
648 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
649 };
650
651#define elf_backend_arch_data &elf_x86_64_arch_bed
652
70256ad8
AJ		 653/* x86-64 ELF linker hash entry. */
654
351f65ca 655struct elf_x86_64_link_hash_entry
70256ad8 656{
c434dee6 657 struct elf_link_hash_entry elf;
70256ad8 658
c434dee6 659 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 660 struct elf_dyn_relocs *dyn_relocs;
bffbf940
JJ		 661
662#define GOT_UNKNOWN 0
663#define GOT_NORMAL 1
664#define GOT_TLS_GD 2
665#define GOT_TLS_IE 3
67a4f2b7
AO		 666#define GOT_TLS_GDESC 4
667#define GOT_TLS_GD_BOTH_P(type) \
668 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
669#define GOT_TLS_GD_P(type) \
670 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
671#define GOT_TLS_GDESC_P(type) \
672 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
673#define GOT_TLS_GD_ANY_P(type) \
674 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
bffbf940 675 unsigned char tls_type;
67a4f2b7
AO		 676
677 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
678 starting at the end of the jump table. */
679 bfd_vma tlsdesc_got;
bffbf940
JJ		 680};
681
351f65ca
L		 682#define elf_x86_64_hash_entry(ent) \
683 ((struct elf_x86_64_link_hash_entry *)(ent))
bffbf940 684
351f65ca 685struct elf_x86_64_obj_tdata
bffbf940
JJ		 686{
687 struct elf_obj_tdata root;
688
689 /* tls_type for each local got entry. */
690 char *local_got_tls_type;
67a4f2b7
AO		 691
692 /* GOTPLT entries for TLS descriptors. */
693 bfd_vma *local_tlsdesc_gotent;
70256ad8
AJ		 694};
695
351f65ca
L		 696#define elf_x86_64_tdata(abfd) \
697 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
bffbf940 698
351f65ca
L		 699#define elf_x86_64_local_got_tls_type(abfd) \
700 (elf_x86_64_tdata (abfd)->local_got_tls_type)
bffbf940 701
351f65ca
L		 702#define elf_x86_64_local_tlsdesc_gotent(abfd) \
703 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
bffbf940 704
0ffa91dd
NC		 705#define is_x86_64_elf(bfd) \
706 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
707 && elf_tdata (bfd) != NULL \
4dfe6ac6 708 && elf_object_id (bfd) == X86_64_ELF_DATA)
0ffa91dd
NC		 709
710static bfd_boolean
351f65ca 711elf_x86_64_mkobject (bfd *abfd)
0ffa91dd 712{
351f65ca 713 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
4dfe6ac6 714 X86_64_ELF_DATA);
0ffa91dd
NC		 715}
716
c434dee6 717/* x86-64 ELF linker hash table. */
8d88c4ca 718
351f65ca 719struct elf_x86_64_link_hash_table
407443a3 720{
c434dee6 721 struct elf_link_hash_table elf;
70256ad8 722
c434dee6 723 /* Short-cuts to get to dynamic linker sections. */
c434dee6
AJ		 724 asection *sdynbss;
725 asection *srelbss;
e41b3a13 726 asection *plt_eh_frame;
70256ad8 727
4dfe6ac6
NC		 728 union
729 {
bffbf940
JJ		 730 bfd_signed_vma refcount;
731 bfd_vma offset;
732 } tls_ld_got;
733
67a4f2b7
AO		 734 /* The amount of space used by the jump slots in the GOT. */
735 bfd_vma sgotplt_jump_table_size;
736
87d72d41
AM		 737 /* Small local sym cache. */
738 struct sym_cache sym_cache;
9f03412a 739
351f65ca
L		 740 bfd_vma (*r_info) (bfd_vma, bfd_vma);
741 bfd_vma (*r_sym) (bfd_vma);
248775ba 742 unsigned int pointer_r_type;
351f65ca
L		 743 const char *dynamic_interpreter;
744 int dynamic_interpreter_size;
745
9f03412a
AO		 746 /* _TLS_MODULE_BASE_ symbol. */
747 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L		 748
749 /* Used by local STT_GNU_IFUNC symbols. */
750 htab_t loc_hash_table;
4dfe6ac6
NC		 751 void * loc_hash_memory;
752
753 /* The offset into splt of the PLT entry for the TLS descriptor
754 resolver. Special values are 0, if not necessary (or not found
755 to be necessary yet), and -1 if needed but not determined
756 yet. */
757 bfd_vma tlsdesc_plt;
758 /* The offset into sgot of the GOT entry used by the PLT entry
759 above. */
760 bfd_vma tlsdesc_got;
e1f98742
L		 761
762 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
763 bfd_vma next_jump_slot_index;
764 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
765 bfd_vma next_irelative_index;
c434dee6 766};
70256ad8
AJ		 767
768/* Get the x86-64 ELF linker hash table from a link_info structure. */
8d88c4ca 769
351f65ca 770#define elf_x86_64_hash_table(p) \
4dfe6ac6 771 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
351f65ca 772 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
8d88c4ca 773
351f65ca 774#define elf_x86_64_compute_jump_table_size(htab) \
6de2ae4a 775 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
67a4f2b7 776
407443a3 777/* Create an entry in an x86-64 ELF linker hash table. */
70256ad8
AJ		 778
779static struct bfd_hash_entry *
351f65ca
L		 780elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
781 struct bfd_hash_table *table,
782 const char *string)
70256ad8 783{
70256ad8 784 /* Allocate the structure if it has not already been allocated by a
c434dee6
AJ		 785 subclass. */
786 if (entry == NULL)
787 {
a50b1753 788 entry = (struct bfd_hash_entry *)
eed180f8
RM		 789 bfd_hash_allocate (table,
790 sizeof (struct elf_x86_64_link_hash_entry));
c434dee6
AJ		 791 if (entry == NULL)
792 return entry;
793 }
70256ad8
AJ		 794
795 /* Call the allocation method of the superclass. */
c434dee6
AJ		 796 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
797 if (entry != NULL)
70256ad8 798 {
351f65ca 799 struct elf_x86_64_link_hash_entry *eh;
c434dee6 800
351f65ca 801 eh = (struct elf_x86_64_link_hash_entry *) entry;
c434dee6 802 eh->dyn_relocs = NULL;
bffbf940 803 eh->tls_type = GOT_UNKNOWN;
67a4f2b7 804 eh->tlsdesc_got = (bfd_vma) -1;
70256ad8
AJ		 805 }
806
c434dee6 807 return entry;
70256ad8
AJ		 808}
809
c25bc9fc
L		 810/* Compute a hash of a local hash entry. We use elf_link_hash_entry
811 for local symbol so that we can handle local STT_GNU_IFUNC symbols
812 as global symbol. We reuse indx and dynstr_index for local symbol
813 hash since they aren't used by global symbols in this backend. */
814
815static hashval_t
351f65ca 816elf_x86_64_local_htab_hash (const void *ptr)
c25bc9fc
L		 817{
818 struct elf_link_hash_entry *h
819 = (struct elf_link_hash_entry *) ptr;
d2149d72 820 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L		 821}
822
823/* Compare local hash entries. */
824
825static int
351f65ca 826elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
c25bc9fc
L		 827{
828 struct elf_link_hash_entry *h1
829 = (struct elf_link_hash_entry *) ptr1;
830 struct elf_link_hash_entry *h2
831 = (struct elf_link_hash_entry *) ptr2;
832
833 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
834}
835
836/* Find and/or create a hash entry for local symbol. */
837
838static struct elf_link_hash_entry *
351f65ca
L		 839elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
840 bfd *abfd, const Elf_Internal_Rela *rel,
841 bfd_boolean create)
c25bc9fc 842{
351f65ca 843 struct elf_x86_64_link_hash_entry e, *ret;
c25bc9fc 844 asection *sec = abfd->sections;
d2149d72 845 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
351f65ca 846 htab->r_sym (rel->r_info));
c25bc9fc
L		 847 void **slot;
848
849 e.elf.indx = sec->id;
351f65ca 850 e.elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc
L		 851 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
852 create ? INSERT : NO_INSERT);
853
854 if (!slot)
855 return NULL;
856
857 if (*slot)
858 {
351f65ca 859 ret = (struct elf_x86_64_link_hash_entry *) *slot;
c25bc9fc
L		 860 return &ret->elf;
861 }
862
351f65ca 863 ret = (struct elf_x86_64_link_hash_entry *)
c25bc9fc 864 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
351f65ca 865 sizeof (struct elf_x86_64_link_hash_entry));
c25bc9fc
L		 866 if (ret)
867 {
868 memset (ret, 0, sizeof (*ret));
869 ret->elf.indx = sec->id;
351f65ca 870 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc 871 ret->elf.dynindx = -1;
c25bc9fc
L		 872 *slot = ret;
873 }
874 return &ret->elf;
875}
876
8d88c4ca
NC		 877/* Create an X86-64 ELF linker hash table. */
878
879static struct bfd_link_hash_table *
351f65ca 880elf_x86_64_link_hash_table_create (bfd *abfd)
8d88c4ca 881{
351f65ca
L		 882 struct elf_x86_64_link_hash_table *ret;
883 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
8d88c4ca 884
351f65ca 885 ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt);
c434dee6 886 if (ret == NULL)
8d88c4ca
NC		 887 return NULL;
888
eb4ff4d6 889 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
351f65ca
L		 890 elf_x86_64_link_hash_newfunc,
891 sizeof (struct elf_x86_64_link_hash_entry),
4dfe6ac6 892 X86_64_ELF_DATA))
8d88c4ca 893 {
e2d34d7d 894 free (ret);
8d88c4ca
NC		 895 return NULL;
896 }
897
c434dee6
AJ		 898 ret->sdynbss = NULL;
899 ret->srelbss = NULL;
332ce62b 900 ret->plt_eh_frame = NULL;
87d72d41 901 ret->sym_cache.abfd = NULL;
67a4f2b7
AO		 902 ret->tlsdesc_plt = 0;
903 ret->tlsdesc_got = 0;
bffbf940 904 ret->tls_ld_got.refcount = 0;
67a4f2b7 905 ret->sgotplt_jump_table_size = 0;
9f03412a 906 ret->tls_module_base = NULL;
eed180f8 907 ret->next_jump_slot_index = 0;
e1f98742 908 ret->next_irelative_index = 0;
6bbec505 909
351f65ca
L		 910 if (ABI_64_P (abfd))
911 {
912 ret->r_info = elf64_r_info;
913 ret->r_sym = elf64_r_sym;
248775ba 914 ret->pointer_r_type = R_X86_64_64;
351f65ca
L		 915 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
916 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
917 }
918 else
919 {
920 ret->r_info = elf32_r_info;
921 ret->r_sym = elf32_r_sym;
248775ba 922 ret->pointer_r_type = R_X86_64_32;
351f65ca
L		 923 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
924 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
925 }
926
c25bc9fc 927 ret->loc_hash_table = htab_try_create (1024,
351f65ca
L		 928 elf_x86_64_local_htab_hash,
929 elf_x86_64_local_htab_eq,
c25bc9fc
L		 930 NULL);
931 ret->loc_hash_memory = objalloc_create ();
932 if (!ret->loc_hash_table || !ret->loc_hash_memory)
933 {
934 free (ret);
935 return NULL;
936 }
937
c434dee6
AJ		 938 return &ret->elf.root;
939}
940
c25bc9fc
L		 941/* Destroy an X86-64 ELF linker hash table. */
942
943static void
351f65ca 944elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash)
c25bc9fc 945{
351f65ca
L		 946 struct elf_x86_64_link_hash_table *htab
947 = (struct elf_x86_64_link_hash_table *) hash;
c25bc9fc
L		 948
949 if (htab->loc_hash_table)
950 htab_delete (htab->loc_hash_table);
951 if (htab->loc_hash_memory)
952 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
953 _bfd_generic_link_hash_table_free (hash);
954}
955
c434dee6
AJ		 956/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
957 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
958 hash table. */
959
b34976b6 960static bfd_boolean
351f65ca
L		 961elf_x86_64_create_dynamic_sections (bfd *dynobj,
962 struct bfd_link_info *info)
c434dee6 963{
351f65ca 964 struct elf_x86_64_link_hash_table *htab;
c434dee6 965
c434dee6 966 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 967 return FALSE;
c434dee6 968
351f65ca 969 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 970 if (htab == NULL)
971 return FALSE;
972
3d4d4302 973 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
c434dee6 974 if (!info->shared)
3d4d4302 975 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
c434dee6 976
6de2ae4a 977 if (!htab->sdynbss
c434dee6
AJ		 978 || (!info->shared && !htab->srelbss))
979 abort ();
980
e41b3a13 981 if (!info->no_ld_generated_unwind_info
2fe0fd06 982 && htab->plt_eh_frame == NULL
e4de50d4 983 && htab->elf.splt != NULL)
e41b3a13 984 {
bbf96e4e
L		 985 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
986 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
987 | SEC_LINKER_CREATED);
e41b3a13 988 htab->plt_eh_frame
bbf96e4e 989 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ		 990 if (htab->plt_eh_frame == NULL
991 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
992 return FALSE;
e41b3a13 993 }
b34976b6 994 return TRUE;
c434dee6
AJ		 995}
996
997/* Copy the extra info we tack onto an elf_link_hash_entry. */
998
999static void
351f65ca
L		 1000elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1001 struct elf_link_hash_entry *dir,
1002 struct elf_link_hash_entry *ind)
c434dee6 1003{
351f65ca 1004 struct elf_x86_64_link_hash_entry *edir, *eind;
c434dee6 1005
351f65ca
L		 1006 edir = (struct elf_x86_64_link_hash_entry *) dir;
1007 eind = (struct elf_x86_64_link_hash_entry *) ind;
c434dee6
AJ		 1008
1009 if (eind->dyn_relocs != NULL)
1010 {
1011 if (edir->dyn_relocs != NULL)
1012 {
e03a8ed8
L		 1013 struct elf_dyn_relocs **pp;
1014 struct elf_dyn_relocs *p;
c434dee6 1015
fcfa13d2 1016 /* Add reloc counts against the indirect sym to the direct sym
c434dee6
AJ		 1017 list. Merge any entries against the same section. */
1018 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1019 {
e03a8ed8 1020 struct elf_dyn_relocs *q;
c434dee6
AJ		 1021
1022 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1023 if (q->sec == p->sec)
1024 {
1025 q->pc_count += p->pc_count;
1026 q->count += p->count;
1027 *pp = p->next;
1028 break;
1029 }
1030 if (q == NULL)
1031 pp = &p->next;
1032 }
1033 *pp = edir->dyn_relocs;
1034 }
1035
1036 edir->dyn_relocs = eind->dyn_relocs;
1037 eind->dyn_relocs = NULL;
1038 }
1039
bffbf940
JJ		 1040 if (ind->root.type == bfd_link_hash_indirect
1041 && dir->got.refcount <= 0)
1042 {
1043 edir->tls_type = eind->tls_type;
1044 eind->tls_type = GOT_UNKNOWN;
1045 }
1046
d40d037c
AJ		 1047 if (ELIMINATE_COPY_RELOCS
1048 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 1049 && dir->dynamic_adjusted)
1050 {
1051 /* If called to transfer flags for a weakdef during processing
1052 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1053 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1054 dir->ref_dynamic |= ind->ref_dynamic;
1055 dir->ref_regular |= ind->ref_regular;
1056 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1057 dir->needs_plt |= ind->needs_plt;
1058 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1059 }
d40d037c 1060 else
fcfa13d2 1061 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
8d88c4ca
NC		 1062}
1063
b34976b6 1064static bfd_boolean
27482721 1065elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940 1066{
8d88c4ca
NC		 1067 /* Set the right machine number for an x86-64 elf64 file. */
1068 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 1069 return TRUE;
8d88c4ca
NC		 1070}
1071
8059fb19
RM		 1072static bfd_boolean
1073elf32_x86_64_elf_object_p (bfd *abfd)
1074{
1075 /* Set the right machine number for an x86-64 elf32 file. */
1076 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1077 return TRUE;
1078}
1079
142411ca
L		 1080/* Return TRUE if the TLS access code sequence support transition
1081 from R_TYPE. */
1082
1083static bfd_boolean
351f65ca
L		 1084elf_x86_64_check_tls_transition (bfd *abfd,
1085 struct bfd_link_info *info,
1086 asection *sec,
1087 bfd_byte *contents,
1088 Elf_Internal_Shdr *symtab_hdr,
1089 struct elf_link_hash_entry **sym_hashes,
1090 unsigned int r_type,
1091 const Elf_Internal_Rela *rel,
1092 const Elf_Internal_Rela *relend)
bffbf940 1093{
142411ca
L		 1094 unsigned int val;
1095 unsigned long r_symndx;
1096 struct elf_link_hash_entry *h;
1097 bfd_vma offset;
351f65ca 1098 struct elf_x86_64_link_hash_table *htab;
142411ca
L		 1099
1100 /* Get the section contents. */
1101 if (contents == NULL)
1102 {
1103 if (elf_section_data (sec)->this_hdr.contents != NULL)
1104 contents = elf_section_data (sec)->this_hdr.contents;
1105 else
1106 {
1107 /* FIXME: How to better handle error condition? */
1108 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1109 return FALSE;
bffbf940 1110
142411ca
L		 1111 /* Cache the section contents for elf_link_input_bfd. */
1112 elf_section_data (sec)->this_hdr.contents = contents;
1113 }
1114 }
1115
351f65ca 1116 htab = elf_x86_64_hash_table (info);
142411ca 1117 offset = rel->r_offset;
bffbf940 1118 switch (r_type)
142411ca
L		 1119 {
1120 case R_X86_64_TLSGD:
1121 case R_X86_64_TLSLD:
1122 if ((rel + 1) >= relend)
1123 return FALSE;
1124
1125 if (r_type == R_X86_64_TLSGD)
1126 {
52bc799a 1127 /* Check transition from GD access model. For 64bit, only
142411ca
L		 1128 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1129 .word 0x6666; rex64; call __tls_get_addr
52bc799a
L		 1130 can transit to different access model. For 32bit, only
1131 leaq foo@tlsgd(%rip), %rdi
1132 .word 0x6666; rex64; call __tls_get_addr
142411ca
L		 1133 can transit to different access model. */
1134
fa289a5f
AM		 1135 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1136 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1137
52bc799a 1138 if ((offset + 12) > sec->size
fa289a5f 1139 || memcmp (contents + offset + 4, call, 4) != 0)
142411ca 1140 return FALSE;
52bc799a
L		 1141
1142 if (ABI_64_P (abfd))
1143 {
52bc799a 1144 if (offset < 4
fa289a5f 1145 || memcmp (contents + offset - 4, leaq, 4) != 0)
52bc799a
L		 1146 return FALSE;
1147 }
1148 else
1149 {
52bc799a 1150 if (offset < 3
fa289a5f 1151 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
52bc799a
L		 1152 return FALSE;
1153 }
142411ca
L		 1154 }
1155 else
1156 {
1157 /* Check transition from LD access model. Only
1158 leaq foo@tlsld(%rip), %rdi;
1159 call __tls_get_addr
1160 can transit to different access model. */
1161
fa289a5f 1162 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
142411ca
L		 1163
1164 if (offset < 3 || (offset + 9) > sec->size)
1165 return FALSE;
1166
fa289a5f
AM		 1167 if (memcmp (contents + offset - 3, lea, 3) != 0
1168 || 0xe8 != *(contents + offset + 4))
142411ca
L		 1169 return FALSE;
1170 }
1171
351f65ca 1172 r_symndx = htab->r_sym (rel[1].r_info);
142411ca
L		 1173 if (r_symndx < symtab_hdr->sh_info)
1174 return FALSE;
1175
1176 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b 1177 /* Use strncmp to check __tls_get_addr since __tls_get_addr
eed180f8 1178 may be versioned. */
142411ca
L		 1179 return (h != NULL
1180 && h->root.root.string != NULL
351f65ca
L		 1181 && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1182 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)
c4fb387b
L		 1183 && (strncmp (h->root.root.string,
1184 "__tls_get_addr", 14) == 0));
142411ca
L		 1185
1186 case R_X86_64_GOTTPOFF:
1187 /* Check transition from IE access model:
4a4c5f25
L		 1188 mov foo@gottpoff(%rip), %reg
1189 add foo@gottpoff(%rip), %reg
142411ca
L		 1190 */
1191
4a4c5f25
L		 1192 /* Check REX prefix first. */
1193 if (offset >= 3 && (offset + 4) <= sec->size)
1194 {
1195 val = bfd_get_8 (abfd, contents + offset - 3);
1196 if (val != 0x48 && val != 0x4c)
1197 {
1198 /* X32 may have 0x44 REX prefix or no REX prefix. */
1199 if (ABI_64_P (abfd))
1200 return FALSE;
1201 }
1202 }
1203 else
1204 {
1205 /* X32 may not have any REX prefix. */
1206 if (ABI_64_P (abfd))
1207 return FALSE;
1208 if (offset < 2 || (offset + 3) > sec->size)
1209 return FALSE;
1210 }
142411ca
L		 1211
1212 val = bfd_get_8 (abfd, contents + offset - 2);
1213 if (val != 0x8b && val != 0x03)
1214 return FALSE;
1215
1216 val = bfd_get_8 (abfd, contents + offset - 1);
1217 return (val & 0xc7) == 5;
1218
1219 case R_X86_64_GOTPC32_TLSDESC:
1220 /* Check transition from GDesc access model:
1221 leaq x@tlsdesc(%rip), %rax
1222
1223 Make sure it's a leaq adding rip to a 32-bit offset
1224 into any register, although it's probably almost always
1225 going to be rax. */
1226
1227 if (offset < 3 || (offset + 4) > sec->size)
1228 return FALSE;
1229
1230 val = bfd_get_8 (abfd, contents + offset - 3);
1231 if ((val & 0xfb) != 0x48)
1232 return FALSE;
1233
1234 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1235 return FALSE;
1236
1237 val = bfd_get_8 (abfd, contents + offset - 1);
1238 return (val & 0xc7) == 0x05;
1239
1240 case R_X86_64_TLSDESC_CALL:
1241 /* Check transition from GDesc access model:
1242 call *x@tlsdesc(%rax)
1243 */
1244 if (offset + 2 <= sec->size)
1245 {
1246 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM		 1247 static const unsigned char call[] = { 0xff, 0x10 };
1248 return memcmp (contents + offset, call, 2) == 0;
142411ca
L		 1249 }
1250
1251 return FALSE;
1252
1253 default:
1254 abort ();
1255 }
1256}
1257
1258/* Return TRUE if the TLS access transition is OK or no transition
1259 will be performed. Update R_TYPE if there is a transition. */
1260
1261static bfd_boolean
351f65ca
L		 1262elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1263 asection *sec, bfd_byte *contents,
1264 Elf_Internal_Shdr *symtab_hdr,
1265 struct elf_link_hash_entry **sym_hashes,
1266 unsigned int *r_type, int tls_type,
1267 const Elf_Internal_Rela *rel,
1268 const Elf_Internal_Rela *relend,
1269 struct elf_link_hash_entry *h,
1270 unsigned long r_symndx)
142411ca
L		 1271{
1272 unsigned int from_type = *r_type;
1273 unsigned int to_type = from_type;
1274 bfd_boolean check = TRUE;
1275
bb1cb422
L		 1276 /* Skip TLS transition for functions. */
1277 if (h != NULL
1278 && (h->type == STT_FUNC
1279 || h->type == STT_GNU_IFUNC))
1280 return TRUE;
1281
142411ca 1282 switch (from_type)
bffbf940
JJ		 1283 {
1284 case R_X86_64_TLSGD:
67a4f2b7
AO		 1285 case R_X86_64_GOTPC32_TLSDESC:
1286 case R_X86_64_TLSDESC_CALL:
bffbf940 1287 case R_X86_64_GOTTPOFF:
1d85728f 1288 if (info->executable)
142411ca
L		 1289 {
1290 if (h == NULL)
1291 to_type = R_X86_64_TPOFF32;
1292 else
1293 to_type = R_X86_64_GOTTPOFF;
1294 }
1295
351f65ca 1296 /* When we are called from elf_x86_64_relocate_section,
142411ca
L		 1297 CONTENTS isn't NULL and there may be additional transitions
1298 based on TLS_TYPE. */
1299 if (contents != NULL)
1300 {
1301 unsigned int new_to_type = to_type;
1302
1d85728f 1303 if (info->executable
142411ca
L		 1304 && h != NULL
1305 && h->dynindx == -1
1306 && tls_type == GOT_TLS_IE)
1307 new_to_type = R_X86_64_TPOFF32;
1308
1309 if (to_type == R_X86_64_TLSGD
1310 || to_type == R_X86_64_GOTPC32_TLSDESC
1311 || to_type == R_X86_64_TLSDESC_CALL)
1312 {
1313 if (tls_type == GOT_TLS_IE)
1314 new_to_type = R_X86_64_GOTTPOFF;
1315 }
1316
1317 /* We checked the transition before when we were called from
351f65ca 1318 elf_x86_64_check_relocs. We only want to check the new
142411ca
L		 1319 transition which hasn't been checked before. */
1320 check = new_to_type != to_type && from_type == to_type;
1321 to_type = new_to_type;
1322 }
1323
1324 break;
1325
bffbf940 1326 case R_X86_64_TLSLD:
1d85728f 1327 if (info->executable)
142411ca
L		 1328 to_type = R_X86_64_TPOFF32;
1329 break;
1330
1331 default:
1332 return TRUE;
bffbf940
JJ		 1333 }
1334
142411ca
L		 1335 /* Return TRUE if there is no transition. */
1336 if (from_type == to_type)
1337 return TRUE;
1338
1339 /* Check if the transition can be performed. */
1340 if (check
351f65ca
L		 1341 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1342 symtab_hdr, sym_hashes,
1343 from_type, rel, relend))
142411ca 1344 {
2f629d23 1345 reloc_howto_type *from, *to;
4c544807 1346 const char *name;
142411ca 1347
351f65ca
L		 1348 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1349 to = elf_x86_64_rtype_to_howto (abfd, to_type);
142411ca 1350
4c544807
L		 1351 if (h)
1352 name = h->root.root.string;
1353 else
1354 {
351f65ca 1355 struct elf_x86_64_link_hash_table *htab;
4dfe6ac6 1356
351f65ca 1357 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1358 if (htab == NULL)
1359 name = "*unknown*";
1360 else
1361 {
1362 Elf_Internal_Sym *isym;
1363
1364 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1365 abfd, r_symndx);
1366 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1367 }
4c544807
L		 1368 }
1369
142411ca
L		 1370 (*_bfd_error_handler)
1371 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1372 "in section `%A' failed"),
4c544807 1373 abfd, sec, from->name, to->name, name,
142411ca
L		 1374 (unsigned long) rel->r_offset);
1375 bfd_set_error (bfd_error_bad_value);
1376 return FALSE;
1377 }
1378
1379 *r_type = to_type;
1380 return TRUE;
bffbf940
JJ		 1381}
1382
70256ad8 1383/* Look through the relocs for a section during the first phase, and
c434dee6
AJ		 1384 calculate needed space in the global offset table, procedure
1385 linkage table, and dynamic reloc sections. */
70256ad8 1386
b34976b6 1387static bfd_boolean
351f65ca
L		 1388elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1389 asection *sec,
1390 const Elf_Internal_Rela *relocs)
70256ad8 1391{
351f65ca 1392 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 1393 Elf_Internal_Shdr *symtab_hdr;
1394 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ		 1395 const Elf_Internal_Rela *rel;
1396 const Elf_Internal_Rela *rel_end;
70256ad8
AJ		 1397 asection *sreloc;
1398
1049f94e 1399 if (info->relocatable)
b34976b6 1400 return TRUE;
70256ad8 1401
0ffa91dd
NC		 1402 BFD_ASSERT (is_x86_64_elf (abfd));
1403
351f65ca 1404 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1405 if (htab == NULL)
1406 return FALSE;
1407
0ffa91dd 1408 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8 1409 sym_hashes = elf_sym_hashes (abfd);
70256ad8 1410
c434dee6 1411 sreloc = NULL;
cbe950e9 1412
70256ad8
AJ		 1413 rel_end = relocs + sec->reloc_count;
1414 for (rel = relocs; rel < rel_end; rel++)
1415 {
bffbf940 1416 unsigned int r_type;
70256ad8
AJ		 1417 unsigned long r_symndx;
1418 struct elf_link_hash_entry *h;
4c544807
L		 1419 Elf_Internal_Sym *isym;
1420 const char *name;
70256ad8 1421
351f65ca
L		 1422 r_symndx = htab->r_sym (rel->r_info);
1423 r_type = ELF32_R_TYPE (rel->r_info);
c434dee6
AJ		 1424
1425 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1426 {
d003868e
AM		 1427 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1428 abfd, r_symndx);
b34976b6 1429 return FALSE;
c434dee6
AJ		 1430 }
1431
70256ad8 1432 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1433 {
1434 /* A local symbol. */
c2e61a4e
L		 1435 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1436 abfd, r_symndx);
1437 if (isym == NULL)
1438 return FALSE;
c25bc9fc
L		 1439
1440 /* Check relocation against local STT_GNU_IFUNC symbol. */
351f65ca 1441 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
c25bc9fc 1442 {
351f65ca
L		 1443 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1444 TRUE);
c25bc9fc 1445 if (h == NULL)
c2e61a4e 1446 return FALSE;
6bbec505 1447
c25bc9fc
L		 1448 /* Fake a STT_GNU_IFUNC symbol. */
1449 h->type = STT_GNU_IFUNC;
1450 h->def_regular = 1;
1451 h->ref_regular = 1;
1452 h->forced_local = 1;
1453 h->root.type = bfd_link_hash_defined;
1454 }
1455 else
1456 h = NULL;
1457 }
70256ad8 1458 else
71cb9464 1459 {
4c544807 1460 isym = NULL;
71cb9464
L		 1461 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1462 while (h->root.type == bfd_link_hash_indirect
1463 || h->root.type == bfd_link_hash_warning)
1464 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1465 }
cbe950e9 1466
d1534d16
L		 1467 /* Check invalid x32 relocations. */
1468 if (!ABI_64_P (abfd))
1469 switch (r_type)
1470 {
1471 default:
1472 break;
1473
d1534d16
L		 1474 case R_X86_64_DTPOFF64:
1475 case R_X86_64_TPOFF64:
1476 case R_X86_64_PC64:
1477 case R_X86_64_GOTOFF64:
1478 case R_X86_64_GOT64:
1479 case R_X86_64_GOTPCREL64:
1480 case R_X86_64_GOTPC64:
1481 case R_X86_64_GOTPLT64:
1482 case R_X86_64_PLTOFF64:
1483 {
1484 if (h)
1485 name = h->root.root.string;
1486 else
1487 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1488 NULL);
1489 (*_bfd_error_handler)
1490 (_("%B: relocation %s against symbol `%s' isn't "
1491 "supported in x32 mode"), abfd,
1492 x86_64_elf_howto_table[r_type].name, name);
1493 bfd_set_error (bfd_error_bad_value);
1494 return FALSE;
1495 }
1496 break;
1497 }
1498
c25bc9fc
L		 1499 if (h != NULL)
1500 {
cbe950e9
L		 1501 /* Create the ifunc sections for static executables. If we
1502 never see an indirect function symbol nor we are building
1503 a static executable, those sections will be empty and
1504 won't appear in output. */
1505 switch (r_type)
1506 {
1507 default:
1508 break;
1509
1510 case R_X86_64_32S:
1511 case R_X86_64_32:
1512 case R_X86_64_64:
1513 case R_X86_64_PC32:
1514 case R_X86_64_PC64:
1515 case R_X86_64_PLT32:
1516 case R_X86_64_GOTPCREL:
1517 case R_X86_64_GOTPCREL64:
9d4057ee
AM		 1518 if (htab->elf.dynobj == NULL)
1519 htab->elf.dynobj = abfd;
1520 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
c2e61a4e 1521 return FALSE;
cbe950e9
L		 1522 break;
1523 }
1524
1525 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1526 it here if it is defined in a non-shared object. */
1527 if (h->type == STT_GNU_IFUNC
1528 && h->def_regular)
1529 {
1530 /* It is referenced by a non-shared object. */
1531 h->ref_regular = 1;
7ae26bc1 1532 h->needs_plt = 1;
6bbec505 1533
cbe950e9
L		 1534 /* STT_GNU_IFUNC symbol must go through PLT. */
1535 h->plt.refcount += 1;
1536
1537 /* STT_GNU_IFUNC needs dynamic sections. */
1538 if (htab->elf.dynobj == NULL)
1539 htab->elf.dynobj = abfd;
1540
1541 switch (r_type)
1542 {
048cbda4 1543 default:
4c544807
L		 1544 if (h->root.root.string)
1545 name = h->root.root.string;
1546 else
1547 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1548 NULL);
048cbda4
L		 1549 (*_bfd_error_handler)
1550 (_("%B: relocation %s against STT_GNU_IFUNC "
1551 "symbol `%s' isn't handled by %s"), abfd,
1552 x86_64_elf_howto_table[r_type].name,
4c544807 1553 name, __FUNCTION__);
048cbda4 1554 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1555 return FALSE;
cbe950e9 1556
248775ba
L		 1557 case R_X86_64_32:
1558 if (ABI_64_P (abfd))
1559 goto not_pointer;
710ab287
L		 1560 case R_X86_64_64:
1561 h->non_got_ref = 1;
1562 h->pointer_equality_needed = 1;
1563 if (info->shared)
1564 {
710ab287
L		 1565 /* We must copy these reloc types into the output
1566 file. Create a reloc section in dynobj and
1567 make room for this reloc. */
e03a8ed8
L		 1568 sreloc = _bfd_elf_create_ifunc_dyn_reloc
1569 (abfd, info, sec, sreloc,
351f65ca 1570 &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs);
710ab287 1571 if (sreloc == NULL)
c2e61a4e 1572 return FALSE;
710ab287
L		 1573 }
1574 break;
1575
cbe950e9 1576 case R_X86_64_32S:
cbe950e9
L		 1577 case R_X86_64_PC32:
1578 case R_X86_64_PC64:
248775ba 1579not_pointer:
cbe950e9
L		 1580 h->non_got_ref = 1;
1581 if (r_type != R_X86_64_PC32
1582 && r_type != R_X86_64_PC64)
1583 h->pointer_equality_needed = 1;
1584 break;
1585
1586 case R_X86_64_PLT32:
1587 break;
1588
1589 case R_X86_64_GOTPCREL:
1590 case R_X86_64_GOTPCREL64:
7afd84dc 1591 h->got.refcount += 1;
6de2ae4a
L		 1592 if (htab->elf.sgot == NULL
1593 && !_bfd_elf_create_got_section (htab->elf.dynobj,
1594 info))
c2e61a4e 1595 return FALSE;
cbe950e9
L		 1596 break;
1597 }
1598
1599 continue;
1600 }
71cb9464 1601 }
70256ad8 1602
351f65ca
L		 1603 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1604 symtab_hdr, sym_hashes,
1605 &r_type, GOT_UNKNOWN,
1606 rel, rel_end, h, r_symndx))
c2e61a4e 1607 return FALSE;
142411ca 1608
bffbf940 1609 switch (r_type)
70256ad8 1610 {
bffbf940
JJ		 1611 case R_X86_64_TLSLD:
1612 htab->tls_ld_got.refcount += 1;
1613 goto create_got;
1614
1615 case R_X86_64_TPOFF32:
351f65ca 1616 if (!info->executable && ABI_64_P (abfd))
70256ad8 1617 {
09a24cbf 1618 if (h)
4c544807
L		 1619 name = h->root.root.string;
1620 else
1621 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1622 NULL);
bffbf940 1623 (*_bfd_error_handler)
d003868e
AM		 1624 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1625 abfd,
4c544807 1626 x86_64_elf_howto_table[r_type].name, name);
bffbf940 1627 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1628 return FALSE;
70256ad8 1629 }
bffbf940 1630 break;
c434dee6 1631
bffbf940 1632 case R_X86_64_GOTTPOFF:
1d85728f 1633 if (!info->executable)
bffbf940
JJ		 1634 info->flags |= DF_STATIC_TLS;
1635 /* Fall through */
70256ad8 1636
bffbf940
JJ		 1637 case R_X86_64_GOT32:
1638 case R_X86_64_GOTPCREL:
1639 case R_X86_64_TLSGD:
7b81dfbb
AJ		 1640 case R_X86_64_GOT64:
1641 case R_X86_64_GOTPCREL64:
1642 case R_X86_64_GOTPLT64:
67a4f2b7
AO		 1643 case R_X86_64_GOTPC32_TLSDESC:
1644 case R_X86_64_TLSDESC_CALL:
bffbf940
JJ		 1645 /* This symbol requires a global offset table entry. */
1646 {
1647 int tls_type, old_tls_type;
1648
1649 switch (r_type)
1650 {
1651 default: tls_type = GOT_NORMAL; break;
1652 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1653 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
67a4f2b7
AO		 1654 case R_X86_64_GOTPC32_TLSDESC:
1655 case R_X86_64_TLSDESC_CALL:
1656 tls_type = GOT_TLS_GDESC; break;
bffbf940
JJ		 1657 }
1658
1659 if (h != NULL)
1660 {
7b81dfbb
AJ		 1661 if (r_type == R_X86_64_GOTPLT64)
1662 {
1663 /* This relocation indicates that we also need
1664 a PLT entry, as this is a function. We don't need
1665 a PLT entry for local symbols. */
1666 h->needs_plt = 1;
1667 h->plt.refcount += 1;
1668 }
bffbf940 1669 h->got.refcount += 1;
351f65ca 1670 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
bffbf940
JJ		 1671 }
1672 else
1673 {
1674 bfd_signed_vma *local_got_refcounts;
1675
1676 /* This is a global offset table entry for a local symbol. */
1677 local_got_refcounts = elf_local_got_refcounts (abfd);
1678 if (local_got_refcounts == NULL)
1679 {
1680 bfd_size_type size;
1681
1682 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1683 size *= sizeof (bfd_signed_vma)
1684 + sizeof (bfd_vma) + sizeof (char);
bffbf940
JJ		 1685 local_got_refcounts = ((bfd_signed_vma *)
1686 bfd_zalloc (abfd, size));
1687 if (local_got_refcounts == NULL)
c2e61a4e 1688 return FALSE;
bffbf940 1689 elf_local_got_refcounts (abfd) = local_got_refcounts;
351f65ca 1690 elf_x86_64_local_tlsdesc_gotent (abfd)
67a4f2b7 1691 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
351f65ca 1692 elf_x86_64_local_got_tls_type (abfd)
67a4f2b7 1693 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
bffbf940
JJ		 1694 }
1695 local_got_refcounts[r_symndx] += 1;
1696 old_tls_type
351f65ca 1697 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
bffbf940
JJ		 1698 }
1699
1700 /* If a TLS symbol is accessed using IE at least once,
1701 there is no point to use dynamic model for it. */
1702 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7
AO		 1703 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1704 || tls_type != GOT_TLS_IE))
bffbf940 1705 {
67a4f2b7 1706 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
bffbf940 1707 tls_type = old_tls_type;
67a4f2b7
AO		 1708 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1709 && GOT_TLS_GD_ANY_P (tls_type))
1710 tls_type |= old_tls_type;
bffbf940
JJ		 1711 else
1712 {
09a24cbf 1713 if (h)
4c544807
L		 1714 name = h->root.root.string;
1715 else
1716 name = bfd_elf_sym_name (abfd, symtab_hdr,
1717 isym, NULL);
bffbf940 1718 (*_bfd_error_handler)
1f7a4e42 1719 (_("%B: '%s' accessed both as normal and thread local symbol"),
4c544807 1720 abfd, name);
c2e61a4e 1721 return FALSE;
bffbf940
JJ		 1722 }
1723 }
1724
1725 if (old_tls_type != tls_type)
1726 {
1727 if (h != NULL)
351f65ca 1728 elf_x86_64_hash_entry (h)->tls_type = tls_type;
bffbf940 1729 else
351f65ca 1730 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
bffbf940
JJ		 1731 }
1732 }
c434dee6
AJ		 1733 /* Fall through */
1734
d6ab8113
JB		 1735 case R_X86_64_GOTOFF64:
1736 case R_X86_64_GOTPC32:
7b81dfbb 1737 case R_X86_64_GOTPC64:
bffbf940 1738 create_got:
6de2ae4a 1739 if (htab->elf.sgot == NULL)
c434dee6
AJ		 1740 {
1741 if (htab->elf.dynobj == NULL)
1742 htab->elf.dynobj = abfd;
6de2ae4a
L		 1743 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1744 info))
c2e61a4e 1745 return FALSE;
c434dee6 1746 }
70256ad8
AJ		 1747 break;
1748
1749 case R_X86_64_PLT32:
1750 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ		 1751 actually build the entry in adjust_dynamic_symbol,
1752 because this might be a case of linking PIC code which is
1753 never referenced by a dynamic object, in which case we
1754 don't need to generate a procedure linkage table entry
1755 after all. */
70256ad8
AJ		 1756
1757 /* If this is a local symbol, we resolve it directly without
407443a3 1758 creating a procedure linkage table entry. */
70256ad8
AJ		 1759 if (h == NULL)
1760 continue;
1761
f5385ebf 1762 h->needs_plt = 1;
51b64d56 1763 h->plt.refcount += 1;
70256ad8
AJ		 1764 break;
1765
7b81dfbb
AJ		 1766 case R_X86_64_PLTOFF64:
1767 /* This tries to form the 'address' of a function relative
1768 to GOT. For global symbols we need a PLT entry. */
1769 if (h != NULL)
1770 {
1771 h->needs_plt = 1;
1772 h->plt.refcount += 1;
1773 }
1774 goto create_got;
1775
248775ba
L		 1776 case R_X86_64_32:
1777 if (!ABI_64_P (abfd))
1778 goto pointer;
cc78d0af
AJ		 1779 case R_X86_64_8:
1780 case R_X86_64_16:
70256ad8 1781 case R_X86_64_32S:
1b71fb54
AJ		 1782 /* Let's help debug shared library creation. These relocs
1783 cannot be used in shared libs. Don't error out for
1784 sections we don't care about, such as debug sections or
1785 non-constant sections. */
1786 if (info->shared
1787 && (sec->flags & SEC_ALLOC) != 0
1788 && (sec->flags & SEC_READONLY) != 0)
1789 {
09a24cbf 1790 if (h)
4c544807
L		 1791 name = h->root.root.string;
1792 else
1793 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1b71fb54 1794 (*_bfd_error_handler)
d003868e 1795 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
4c544807 1796 abfd, x86_64_elf_howto_table[r_type].name, name);
1b71fb54 1797 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1798 return FALSE;
1b71fb54
AJ		 1799 }
1800 /* Fall through. */
1801
c434dee6
AJ		 1802 case R_X86_64_PC8:
1803 case R_X86_64_PC16:
70256ad8 1804 case R_X86_64_PC32:
d6ab8113 1805 case R_X86_64_PC64:
1b71fb54 1806 case R_X86_64_64:
248775ba 1807pointer:
710ab287 1808 if (h != NULL && info->executable)
c434dee6
AJ		 1809 {
1810 /* If this reloc is in a read-only section, we might
1811 need a copy reloc. We can't check reliably at this
1812 stage whether the section is read-only, as input
1813 sections have not yet been mapped to output sections.
1814 Tentatively set the flag for now, and correct in
1815 adjust_dynamic_symbol. */
f5385ebf 1816 h->non_got_ref = 1;
c434dee6
AJ		 1817
1818 /* We may need a .plt entry if the function this reloc
1819 refers to is in a shared lib. */
1820 h->plt.refcount += 1;
d6ab8113 1821 if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64)
f5385ebf 1822 h->pointer_equality_needed = 1;
c434dee6 1823 }
70256ad8
AJ		 1824
1825 /* If we are creating a shared library, and this is a reloc
1826 against a global symbol, or a non PC relative reloc
1827 against a local symbol, then we need to copy the reloc
1828 into the shared library. However, if we are linking with
1829 -Bsymbolic, we do not need to copy a reloc against a
1830 global symbol which is defined in an object we are
407443a3 1831 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ		 1832 this point we have not seen all the input files, so it is
1833 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ		 1834 later (it is never cleared). In case of a weak definition,
1835 DEF_REGULAR may be cleared later by a strong definition in
1836 a shared library. We account for that possibility below by
1837 storing information in the relocs_copied field of the hash
1838 table entry. A similar situation occurs when creating
1839 shared libraries and symbol visibility changes render the
1840 symbol local.
1841
1842 If on the other hand, we are creating an executable, we
1843 may need to keep relocations for symbols satisfied by a
1844 dynamic library if we manage to avoid copy relocs for the
0f88be7a 1845 symbol. */
c434dee6
AJ		 1846 if ((info->shared
1847 && (sec->flags & SEC_ALLOC) != 0
d8045f23 1848 && (! IS_X86_64_PCREL_TYPE (r_type)
c434dee6 1849 || (h != NULL
55255dae 1850 && (! SYMBOLIC_BIND (info, h)
c434dee6 1851 || h->root.type == bfd_link_hash_defweak
f5385ebf 1852 || !h->def_regular))))
d40d037c
AJ		 1853 || (ELIMINATE_COPY_RELOCS
1854 && !info->shared
c434dee6
AJ		 1855 && (sec->flags & SEC_ALLOC) != 0
1856 && h != NULL
1857 && (h->root.type == bfd_link_hash_defweak
0f88be7a 1858 || !h->def_regular)))
70256ad8 1859 {
e03a8ed8
L		 1860 struct elf_dyn_relocs *p;
1861 struct elf_dyn_relocs **head;
c434dee6
AJ		 1862
1863 /* We must copy these reloc types into the output file.
1864 Create a reloc section in dynobj and make room for
1865 this reloc. */
70256ad8
AJ		 1866 if (sreloc == NULL)
1867 {
c434dee6
AJ		 1868 if (htab->elf.dynobj == NULL)
1869 htab->elf.dynobj = abfd;
1870
83bac4b0 1871 sreloc = _bfd_elf_make_dynamic_reloc_section
82e96e07
L		 1872 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
1873 abfd, /*rela?*/ TRUE);
70256ad8 1874
70256ad8 1875 if (sreloc == NULL)
c2e61a4e 1876 return FALSE;
70256ad8
AJ		 1877 }
1878
c434dee6
AJ		 1879 /* If this is a global symbol, we count the number of
1880 relocations we need for this symbol. */
1881 if (h != NULL)
70256ad8 1882 {
351f65ca 1883 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
c434dee6
AJ		 1884 }
1885 else
1886 {
1887 /* Track dynamic relocs needed for local syms too.
1888 We really need local syms available to do this
1889 easily. Oh well. */
c434dee6 1890 asection *s;
87d72d41 1891 void **vpp;
87d72d41
AM		 1892
1893 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1894 abfd, r_symndx);
1895 if (isym == NULL)
1896 return FALSE;
1897
1898 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
c434dee6 1899 if (s == NULL)
87d72d41 1900 s = sec;
70256ad8 1901
e81d3500
DD		 1902 /* Beware of type punned pointers vs strict aliasing
1903 rules. */
1904 vpp = &(elf_section_data (s)->local_dynrel);
e03a8ed8 1905 head = (struct elf_dyn_relocs **)vpp;
c434dee6 1906 }
70256ad8 1907
c434dee6
AJ		 1908 p = *head;
1909 if (p == NULL || p->sec != sec)
1910 {
1911 bfd_size_type amt = sizeof *p;
d8045f23 1912
e03a8ed8 1913 p = ((struct elf_dyn_relocs *)
c434dee6 1914 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 1915 if (p == NULL)
c2e61a4e 1916 return FALSE;
c434dee6
AJ		 1917 p->next = *head;
1918 *head = p;
1919 p->sec = sec;
1920 p->count = 0;
1921 p->pc_count = 0;
70256ad8 1922 }
c434dee6
AJ		 1923
1924 p->count += 1;
d8045f23 1925 if (IS_X86_64_PCREL_TYPE (r_type))
c434dee6 1926 p->pc_count += 1;
70256ad8
AJ		 1927 }
1928 break;
fe4770f4
AJ		 1929
1930 /* This relocation describes the C++ object vtable hierarchy.
1931 Reconstruct it for later use during GC. */
1932 case R_X86_64_GNU_VTINHERIT:
c152c796 1933 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 1934 return FALSE;
fe4770f4
AJ		 1935 break;
1936
1937 /* This relocation describes which C++ vtable entries are actually
1938 used. Record for later use during GC. */
1939 case R_X86_64_GNU_VTENTRY:
d17e0c6e
JB		 1940 BFD_ASSERT (h != NULL);
1941 if (h != NULL
1942 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
c2e61a4e 1943 return FALSE;
fe4770f4 1944 break;
c434dee6
AJ		 1945
1946 default:
1947 break;
70256ad8
AJ		 1948 }
1949 }
1950
b34976b6 1951 return TRUE;
70256ad8
AJ		 1952}
1953
1954/* Return the section that should be marked against GC for a given
407443a3 1955 relocation. */
70256ad8
AJ		 1956
1957static asection *
351f65ca
L		 1958elf_x86_64_gc_mark_hook (asection *sec,
1959 struct bfd_link_info *info,
1960 Elf_Internal_Rela *rel,
1961 struct elf_link_hash_entry *h,
1962 Elf_Internal_Sym *sym)
70256ad8
AJ		 1963{
1964 if (h != NULL)
351f65ca 1965 switch (ELF32_R_TYPE (rel->r_info))
07adf181
AM		 1966 {
1967 case R_X86_64_GNU_VTINHERIT:
1968 case R_X86_64_GNU_VTENTRY:
1969 return NULL;
1970 }
1971
1972 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
70256ad8
AJ		 1973}
1974
407443a3 1975/* Update the got entry reference counts for the section being removed. */
70256ad8 1976
b34976b6 1977static bfd_boolean
351f65ca
L		 1978elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
1979 asection *sec,
1980 const Elf_Internal_Rela *relocs)
70256ad8 1981{
351f65ca 1982 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 1983 Elf_Internal_Shdr *symtab_hdr;
1984 struct elf_link_hash_entry **sym_hashes;
1985 bfd_signed_vma *local_got_refcounts;
1986 const Elf_Internal_Rela *rel, *relend;
c434dee6 1987
7dda2462
TG		 1988 if (info->relocatable)
1989 return TRUE;
1990
351f65ca 1991 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1992 if (htab == NULL)
1993 return FALSE;
1994
c434dee6 1995 elf_section_data (sec)->local_dynrel = NULL;
70256ad8 1996
0ffa91dd 1997 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8
AJ		 1998 sym_hashes = elf_sym_hashes (abfd);
1999 local_got_refcounts = elf_local_got_refcounts (abfd);
2000
351f65ca 2001 htab = elf_x86_64_hash_table (info);
70256ad8
AJ		 2002 relend = relocs + sec->reloc_count;
2003 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 2004 {
2005 unsigned long r_symndx;
2006 unsigned int r_type;
2007 struct elf_link_hash_entry *h = NULL;
70256ad8 2008
351f65ca 2009 r_symndx = htab->r_sym (rel->r_info);
26e41594
AM		 2010 if (r_symndx >= symtab_hdr->sh_info)
2011 {
26e41594 2012 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 2013 while (h->root.type == bfd_link_hash_indirect
2014 || h->root.type == bfd_link_hash_warning)
2015 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 2016 }
bb1cb422
L		 2017 else
2018 {
2019 /* A local symbol. */
2020 Elf_Internal_Sym *isym;
2021
2022 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2023 abfd, r_symndx);
2024
2025 /* Check relocation against local STT_GNU_IFUNC symbol. */
2026 if (isym != NULL
82e96e07 2027 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
bb1cb422 2028 {
351f65ca 2029 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
bb1cb422
L		 2030 if (h == NULL)
2031 abort ();
2032 }
2033 }
c434dee6 2034
3db2e7dd
L		 2035 if (h)
2036 {
2037 struct elf_x86_64_link_hash_entry *eh;
2038 struct elf_dyn_relocs **pp;
2039 struct elf_dyn_relocs *p;
2040
2041 eh = (struct elf_x86_64_link_hash_entry *) h;
2042
2043 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2044 if (p->sec == sec)
2045 {
2046 /* Everything must go for SEC. */
2047 *pp = p->next;
2048 break;
2049 }
2050 }
2051
351f65ca
L		 2052 r_type = ELF32_R_TYPE (rel->r_info);
2053 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
2054 symtab_hdr, sym_hashes,
2055 &r_type, GOT_UNKNOWN,
2056 rel, relend, h, r_symndx))
142411ca
L		 2057 return FALSE;
2058
26e41594
AM		 2059 switch (r_type)
2060 {
2061 case R_X86_64_TLSLD:
4dfe6ac6
NC		 2062 if (htab->tls_ld_got.refcount > 0)
2063 htab->tls_ld_got.refcount -= 1;
26e41594 2064 break;
c434dee6 2065
26e41594 2066 case R_X86_64_TLSGD:
67a4f2b7
AO		 2067 case R_X86_64_GOTPC32_TLSDESC:
2068 case R_X86_64_TLSDESC_CALL:
26e41594
AM		 2069 case R_X86_64_GOTTPOFF:
2070 case R_X86_64_GOT32:
2071 case R_X86_64_GOTPCREL:
7b81dfbb
AJ		 2072 case R_X86_64_GOT64:
2073 case R_X86_64_GOTPCREL64:
2074 case R_X86_64_GOTPLT64:
26e41594
AM		 2075 if (h != NULL)
2076 {
7b81dfbb 2077 if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0)
eed180f8 2078 h->plt.refcount -= 1;
26e41594
AM		 2079 if (h->got.refcount > 0)
2080 h->got.refcount -= 1;
bb1cb422
L		 2081 if (h->type == STT_GNU_IFUNC)
2082 {
2083 if (h->plt.refcount > 0)
2084 h->plt.refcount -= 1;
2085 }
26e41594
AM		 2086 }
2087 else if (local_got_refcounts != NULL)
2088 {
2089 if (local_got_refcounts[r_symndx] > 0)
2090 local_got_refcounts[r_symndx] -= 1;
2091 }
2092 break;
c434dee6 2093
26e41594
AM		 2094 case R_X86_64_8:
2095 case R_X86_64_16:
2096 case R_X86_64_32:
2097 case R_X86_64_64:
2098 case R_X86_64_32S:
2099 case R_X86_64_PC8:
2100 case R_X86_64_PC16:
2101 case R_X86_64_PC32:
d6ab8113 2102 case R_X86_64_PC64:
3db2e7dd
L		 2103 if (info->shared
2104 && (h == NULL || h->type != STT_GNU_IFUNC))
26e41594
AM		 2105 break;
2106 /* Fall thru */
c434dee6 2107
26e41594 2108 case R_X86_64_PLT32:
7b81dfbb 2109 case R_X86_64_PLTOFF64:
26e41594
AM		 2110 if (h != NULL)
2111 {
2112 if (h->plt.refcount > 0)
2113 h->plt.refcount -= 1;
2114 }
2115 break;
70256ad8 2116
26e41594
AM		 2117 default:
2118 break;
2119 }
2120 }
70256ad8 2121
b34976b6 2122 return TRUE;
70256ad8
AJ		 2123}
2124
2125/* Adjust a symbol defined by a dynamic object and referenced by a
2126 regular object. The current definition is in some section of the
2127 dynamic object, but we're not including those sections. We have to
2128 change the definition to something the rest of the link can
407443a3 2129 understand. */
70256ad8 2130
b34976b6 2131static bfd_boolean
351f65ca
L		 2132elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2133 struct elf_link_hash_entry *h)
70256ad8 2134{
351f65ca 2135 struct elf_x86_64_link_hash_table *htab;
70256ad8 2136 asection *s;
70256ad8 2137
cbe950e9
L		 2138 /* STT_GNU_IFUNC symbol must go through PLT. */
2139 if (h->type == STT_GNU_IFUNC)
2140 {
2141 if (h->plt.refcount <= 0)
2142 {
2143 h->plt.offset = (bfd_vma) -1;
2144 h->needs_plt = 0;
2145 }
2146 return TRUE;
2147 }
2148
70256ad8
AJ		 2149 /* If this is a function, put it in the procedure linkage table. We
2150 will fill in the contents of the procedure linkage table later,
2151 when we know the address of the .got section. */
2152 if (h->type == STT_FUNC
f5385ebf 2153 || h->needs_plt)
70256ad8 2154 {
c434dee6 2155 if (h->plt.refcount <= 0
27482721
AJ		 2156 || SYMBOL_CALLS_LOCAL (info, h)
2157 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2158 && h->root.type == bfd_link_hash_undefweak))
70256ad8 2159 {
70256ad8
AJ		 2160 /* This case can occur if we saw a PLT32 reloc in an input
2161 file, but the symbol was never referred to by a dynamic
2162 object, or if all references were garbage collected. In
2163 such a case, we don't actually need to build a procedure
2164 linkage table, and we can just do a PC32 reloc instead. */
70256ad8 2165 h->plt.offset = (bfd_vma) -1;
f5385ebf 2166 h->needs_plt = 0;
70256ad8
AJ		 2167 }
2168
b34976b6 2169 return TRUE;
70256ad8 2170 }
bbd7ec4a 2171 else
c434dee6
AJ		 2172 /* It's possible that we incorrectly decided a .plt reloc was
2173 needed for an R_X86_64_PC32 reloc to a non-function sym in
2174 check_relocs. We can't decide accurately between function and
2175 non-function syms in check-relocs; Objects loaded later in
2176 the link may change h->type. So fix it now. */
bbd7ec4a 2177 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ		 2178
2179 /* If this is a weak symbol, and there is a real definition, the
2180 processor independent code will have arranged for us to see the
407443a3 2181 real definition first, and we can just use the same value. */
f6e332e6 2182 if (h->u.weakdef != NULL)
70256ad8 2183 {
f6e332e6
AM		 2184 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2185 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2186 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2187 h->root.u.def.value = h->u.weakdef->root.u.def.value;
d40d037c 2188 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 2189 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 2190 return TRUE;
70256ad8
AJ		 2191 }
2192
2193 /* This is a reference to a symbol defined by a dynamic object which
407443a3 2194 is not a function. */
70256ad8
AJ		 2195
2196 /* If we are creating a shared library, we must presume that the
2197 only references to the symbol are via the global offset table.
2198 For such cases we need not do anything here; the relocations will
407443a3 2199 be handled correctly by relocate_section. */
70256ad8 2200 if (info->shared)
b34976b6 2201 return TRUE;
70256ad8
AJ		 2202
2203 /* If there are no references to this symbol that do not use the
2204 GOT, we don't need to generate a copy reloc. */
f5385ebf 2205 if (!h->non_got_ref)
b34976b6 2206 return TRUE;
70256ad8 2207
c434dee6
AJ		 2208 /* If -z nocopyreloc was given, we won't generate them either. */
2209 if (info->nocopyreloc)
2210 {
f5385ebf 2211 h->non_got_ref = 0;
b34976b6 2212 return TRUE;
c434dee6
AJ		 2213 }
2214
d40d037c 2215 if (ELIMINATE_COPY_RELOCS)
c434dee6 2216 {
351f65ca 2217 struct elf_x86_64_link_hash_entry * eh;
e03a8ed8 2218 struct elf_dyn_relocs *p;
c434dee6 2219
351f65ca 2220 eh = (struct elf_x86_64_link_hash_entry *) h;
d40d037c
AJ		 2221 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2222 {
2223 s = p->sec->output_section;
2224 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2225 break;
2226 }
2227
2228 /* If we didn't find any dynamic relocs in read-only sections, then
2229 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2230 if (p == NULL)
2231 {
f5385ebf 2232 h->non_got_ref = 0;
d40d037c
AJ		 2233 return TRUE;
2234 }
c434dee6
AJ		 2235 }
2236
70256ad8 2237 /* We must allocate the symbol in our .dynbss section, which will
407443a3 2238 become part of the .bss section of the executable. There will be
70256ad8
AJ		 2239 an entry for this symbol in the .dynsym section. The dynamic
2240 object will contain position independent code, so all references
2241 from the dynamic object to this symbol will go through the global
2242 offset table. The dynamic linker will use the .dynsym entry to
2243 determine the address it must put in the global offset table, so
2244 both the dynamic object and the regular object will refer to the
2245 same memory location for the variable. */
2246
351f65ca 2247 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2248 if (htab == NULL)
2249 return FALSE;
70256ad8
AJ		 2250
2251 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2252 to copy the initial value out of the dynamic object and into the
cedb70c5 2253 runtime process image. */
1d7e9d18 2254 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
70256ad8 2255 {
351f65ca
L		 2256 const struct elf_backend_data *bed;
2257 bed = get_elf_backend_data (info->output_bfd);
2258 htab->srelbss->size += bed->s->sizeof_rela;
f5385ebf 2259 h->needs_copy = 1;
70256ad8
AJ		 2260 }
2261
c434dee6 2262 s = htab->sdynbss;
70256ad8 2263
027297b7 2264 return _bfd_elf_adjust_dynamic_copy (h, s);
70256ad8
AJ		 2265}
2266
c434dee6
AJ		 2267/* Allocate space in .plt, .got and associated reloc sections for
2268 dynamic relocs. */
2269
b34976b6 2270static bfd_boolean
351f65ca 2271elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 2272{
2273 struct bfd_link_info *info;
351f65ca
L		 2274 struct elf_x86_64_link_hash_table *htab;
2275 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2276 struct elf_dyn_relocs *p;
351f65ca 2277 const struct elf_backend_data *bed;
eed180f8 2278 unsigned int plt_entry_size;
c434dee6 2279
e92d460e 2280 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2281 return TRUE;
c434dee6 2282
351f65ca 2283 eh = (struct elf_x86_64_link_hash_entry *) h;
e92d460e 2284
c434dee6 2285 info = (struct bfd_link_info *) inf;
351f65ca 2286 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2287 if (htab == NULL)
2288 return FALSE;
351f65ca 2289 bed = get_elf_backend_data (info->output_bfd);
eed180f8 2290 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
c434dee6 2291
cbe950e9
L		 2292 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2293 here if it is defined and referenced in a non-shared object. */
2294 if (h->type == STT_GNU_IFUNC
2295 && h->def_regular)
e03a8ed8
L		 2296 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2297 &eh->dyn_relocs,
eed180f8 2298 plt_entry_size,
e03a8ed8 2299 GOT_ENTRY_SIZE);
cbe950e9
L		 2300 else if (htab->elf.dynamic_sections_created
2301 && h->plt.refcount > 0)
c434dee6
AJ		 2302 {
2303 /* Make sure this symbol is output as a dynamic symbol.
2304 Undefined weak syms won't yet be marked as dynamic. */
2305 if (h->dynindx == -1
f5385ebf 2306 && !h->forced_local)
c434dee6 2307 {
c152c796 2308 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2309 return FALSE;
c434dee6
AJ		 2310 }
2311
27482721
AJ		 2312 if (info->shared
2313 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6 2314 {
6de2ae4a 2315 asection *s = htab->elf.splt;
c434dee6
AJ		 2316
2317 /* If this is the first .plt entry, make room for the special
2318 first entry. */
eea6121a 2319 if (s->size == 0)
eed180f8 2320 s->size += plt_entry_size;
c434dee6 2321
eea6121a 2322 h->plt.offset = s->size;
c434dee6
AJ		 2323
2324 /* If this symbol is not defined in a regular file, and we are
2325 not generating a shared library, then set the symbol to this
2326 location in the .plt. This is required to make function
2327 pointers compare as equal between the normal executable and
2328 the shared library. */
2329 if (! info->shared
f5385ebf 2330 && !h->def_regular)
c434dee6
AJ		 2331 {
2332 h->root.u.def.section = s;
2333 h->root.u.def.value = h->plt.offset;
2334 }
2335
2336 /* Make room for this entry. */
eed180f8 2337 s->size += plt_entry_size;
c434dee6
AJ		 2338
2339 /* We also need to make an entry in the .got.plt section, which
2340 will be placed in the .got section by the linker script. */
6de2ae4a 2341 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
c434dee6
AJ		 2342
2343 /* We also need to make an entry in the .rela.plt section. */
351f65ca 2344 htab->elf.srelplt->size += bed->s->sizeof_rela;
6de2ae4a 2345 htab->elf.srelplt->reloc_count++;
c434dee6
AJ		 2346 }
2347 else
2348 {
2349 h->plt.offset = (bfd_vma) -1;
f5385ebf 2350 h->needs_plt = 0;
c434dee6
AJ		 2351 }
2352 }
2353 else
2354 {
2355 h->plt.offset = (bfd_vma) -1;
f5385ebf 2356 h->needs_plt = 0;
c434dee6
AJ		 2357 }
2358
67a4f2b7
AO		 2359 eh->tlsdesc_got = (bfd_vma) -1;
2360
bffbf940
JJ		 2361 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2362 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2363 if (h->got.refcount > 0
1d85728f 2364 && info->executable
bffbf940 2365 && h->dynindx == -1
351f65ca 2366 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
d8045f23
NC		 2367 {
2368 h->got.offset = (bfd_vma) -1;
2369 }
bffbf940 2370 else if (h->got.refcount > 0)
c434dee6
AJ		 2371 {
2372 asection *s;
b34976b6 2373 bfd_boolean dyn;
351f65ca 2374 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ		 2375
2376 /* Make sure this symbol is output as a dynamic symbol.
2377 Undefined weak syms won't yet be marked as dynamic. */
2378 if (h->dynindx == -1
f5385ebf 2379 && !h->forced_local)
c434dee6 2380 {
c152c796 2381 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2382 return FALSE;
c434dee6
AJ		 2383 }
2384
67a4f2b7
AO		 2385 if (GOT_TLS_GDESC_P (tls_type))
2386 {
6de2ae4a 2387 eh->tlsdesc_got = htab->elf.sgotplt->size
351f65ca 2388 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2389 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 2390 h->got.offset = (bfd_vma) -2;
2391 }
2392 if (! GOT_TLS_GDESC_P (tls_type)
2393 || GOT_TLS_GD_P (tls_type))
2394 {
6de2ae4a 2395 s = htab->elf.sgot;
67a4f2b7
AO		 2396 h->got.offset = s->size;
2397 s->size += GOT_ENTRY_SIZE;
2398 if (GOT_TLS_GD_P (tls_type))
2399 s->size += GOT_ENTRY_SIZE;
2400 }
c434dee6 2401 dyn = htab->elf.dynamic_sections_created;
bffbf940
JJ		 2402 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2403 and two if global.
2404 R_X86_64_GOTTPOFF needs one dynamic relocation. */
67a4f2b7 2405 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
bffbf940 2406 || tls_type == GOT_TLS_IE)
351f65ca 2407 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7 2408 else if (GOT_TLS_GD_P (tls_type))
351f65ca 2409 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
67a4f2b7
AO		 2410 else if (! GOT_TLS_GDESC_P (tls_type)
2411 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2412 || h->root.type != bfd_link_hash_undefweak)
27482721
AJ		 2413 && (info->shared
2414 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
351f65ca 2415 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2416 if (GOT_TLS_GDESC_P (tls_type))
2417 {
351f65ca 2418 htab->elf.srelplt->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2419 htab->tlsdesc_plt = (bfd_vma) -1;
2420 }
c434dee6
AJ		 2421 }
2422 else
2423 h->got.offset = (bfd_vma) -1;
2424
c434dee6 2425 if (eh->dyn_relocs == NULL)
b34976b6 2426 return TRUE;
c434dee6
AJ		 2427
2428 /* In the shared -Bsymbolic case, discard space allocated for
2429 dynamic pc-relative relocs against symbols which turn out to be
2430 defined in regular objects. For the normal shared case, discard
2431 space for pc-relative relocs that have become local due to symbol
2432 visibility changes. */
2433
2434 if (info->shared)
2435 {
27482721
AJ		 2436 /* Relocs that use pc_count are those that appear on a call
2437 insn, or certain REL relocs that can generated via assembly.
2438 We want calls to protected symbols to resolve directly to the
2439 function rather than going via the plt. If people want
2440 function pointer comparisons to work as expected then they
2441 should avoid writing weird assembly. */
2442 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6 2443 {
e03a8ed8 2444 struct elf_dyn_relocs **pp;
c434dee6
AJ		 2445
2446 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2447 {
2448 p->count -= p->pc_count;
2449 p->pc_count = 0;
2450 if (p->count == 0)
2451 *pp = p->next;
2452 else
2453 pp = &p->next;
2454 }
2455 }
4e795f50
AM		 2456
2457 /* Also discard relocs on undefined weak syms with non-default
2458 visibility. */
22d606e9 2459 if (eh->dyn_relocs != NULL
4e795f50 2460 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM		 2461 {
2462 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2463 eh->dyn_relocs = NULL;
2464
2465 /* Make sure undefined weak symbols are output as a dynamic
2466 symbol in PIEs. */
2467 else if (h->dynindx == -1
d8045f23
NC		 2468 && ! h->forced_local
2469 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2470 return FALSE;
22d606e9 2471 }
cbe950e9 2472
d8045f23 2473 }
d40d037c 2474 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ		 2475 {
2476 /* For the non-shared case, discard space for relocs against
2477 symbols which turn out to need copy relocs or are not
2478 dynamic. */
2479
f5385ebf
AM		 2480 if (!h->non_got_ref
2481 && ((h->def_dynamic
2482 && !h->def_regular)
c434dee6
AJ		 2483 || (htab->elf.dynamic_sections_created
2484 && (h->root.type == bfd_link_hash_undefweak
2485 || h->root.type == bfd_link_hash_undefined))))
2486 {
2487 /* Make sure this symbol is output as a dynamic symbol.
2488 Undefined weak syms won't yet be marked as dynamic. */
2489 if (h->dynindx == -1
d8045f23
NC		 2490 && ! h->forced_local
2491 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2492 return FALSE;
c434dee6
AJ		 2493
2494 /* If that succeeded, we know we'll be keeping all the
2495 relocs. */
2496 if (h->dynindx != -1)
2497 goto keep;
2498 }
2499
2500 eh->dyn_relocs = NULL;
2501
2502 keep: ;
2503 }
2504
2505 /* Finally, allocate space. */
2506 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2507 {
e7c33416
NC		 2508 asection * sreloc;
2509
cbe950e9 2510 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2511
2512 BFD_ASSERT (sreloc != NULL);
2513
351f65ca 2514 sreloc->size += p->count * bed->s->sizeof_rela;
c434dee6
AJ		 2515 }
2516
b34976b6 2517 return TRUE;
c434dee6
AJ		 2518}
2519
c25bc9fc
L		 2520/* Allocate space in .plt, .got and associated reloc sections for
2521 local dynamic relocs. */
2522
2523static bfd_boolean
351f65ca 2524elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
c25bc9fc
L		 2525{
2526 struct elf_link_hash_entry *h
2527 = (struct elf_link_hash_entry *) *slot;
2528
2529 if (h->type != STT_GNU_IFUNC
2530 || !h->def_regular
2531 || !h->ref_regular
2532 || !h->forced_local
2533 || h->root.type != bfd_link_hash_defined)
2534 abort ();
2535
351f65ca 2536 return elf_x86_64_allocate_dynrelocs (h, inf);
c25bc9fc
L		 2537}
2538
c434dee6
AJ		 2539/* Find any dynamic relocs that apply to read-only sections. */
2540
b34976b6 2541static bfd_boolean
351f65ca
L		 2542elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2543 void * inf)
c434dee6 2544{
351f65ca 2545 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2546 struct elf_dyn_relocs *p;
c434dee6 2547
aa715242
L		 2548 /* Skip local IFUNC symbols. */
2549 if (h->forced_local && h->type == STT_GNU_IFUNC)
2550 return TRUE;
2551
351f65ca 2552 eh = (struct elf_x86_64_link_hash_entry *) h;
c434dee6
AJ		 2553 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2554 {
2555 asection *s = p->sec->output_section;
2556
2557 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2558 {
2559 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2560
2561 info->flags |= DF_TEXTREL;
2562
b70321a2
L		 2563 if (info->warn_shared_textrel && info->shared)
2564 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2565 p->sec->owner, h->root.root.string,
2566 p->sec);
2567
c434dee6 2568 /* Not an error, just cut short the traversal. */
b34976b6 2569 return FALSE;
c434dee6
AJ		 2570 }
2571 }
b34976b6 2572 return TRUE;
c434dee6
AJ		 2573}
2574
daa67607
L		 2575/* Convert
2576 mov foo@GOTPCREL(%rip), %reg
2577 to
2578 lea foo(%rip), %reg
2579 with the local symbol, foo. */
2580
2581static bfd_boolean
2582elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec,
2583 struct bfd_link_info *link_info)
2584{
2585 Elf_Internal_Shdr *symtab_hdr;
2586 Elf_Internal_Rela *internal_relocs;
2587 Elf_Internal_Rela *irel, *irelend;
2588 bfd_byte *contents;
2589 struct elf_x86_64_link_hash_table *htab;
2590 bfd_boolean changed_contents;
2591 bfd_boolean changed_relocs;
2592 bfd_signed_vma *local_got_refcounts;
2593
2594 /* Don't even try to convert non-ELF outputs. */
2595 if (!is_elf_hash_table (link_info->hash))
2596 return FALSE;
2597
fbdc86d9 2598 /* Nothing to do if there are no codes, no relocations or no output. */
daa67607 2599 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
fbdc86d9
L		 2600 || sec->reloc_count == 0
2601 || discarded_section (sec))
daa67607
L		 2602 return TRUE;
2603
2604 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2605
2606 /* Load the relocations for this section. */
2607 internal_relocs = (_bfd_elf_link_read_relocs
2608 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2609 link_info->keep_memory));
2610 if (internal_relocs == NULL)
2611 return FALSE;
2612
2613 htab = elf_x86_64_hash_table (link_info);
2614 changed_contents = FALSE;
2615 changed_relocs = FALSE;
2616 local_got_refcounts = elf_local_got_refcounts (abfd);
2617
2618 /* Get the section contents. */
2619 if (elf_section_data (sec)->this_hdr.contents != NULL)
2620 contents = elf_section_data (sec)->this_hdr.contents;
2621 else
2622 {
2623 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2624 goto error_return;
2625 }
2626
2627 irelend = internal_relocs + sec->reloc_count;
2628 for (irel = internal_relocs; irel < irelend; irel++)
2629 {
2630 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2631 unsigned int r_symndx = htab->r_sym (irel->r_info);
2632 unsigned int indx;
2633 struct elf_link_hash_entry *h;
2634
2635 if (r_type != R_X86_64_GOTPCREL)
2636 continue;
2637
2638 /* Get the symbol referred to by the reloc. */
2639 if (r_symndx < symtab_hdr->sh_info)
2640 {
2641 Elf_Internal_Sym *isym;
2642
2643 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2644 abfd, r_symndx);
2645
2646 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2647 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2648 && bfd_get_8 (input_bfd,
2649 contents + irel->r_offset - 2) == 0x8b)
2650 {
2651 bfd_put_8 (output_bfd, 0x8d,
2652 contents + irel->r_offset - 2);
2653 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2654 if (local_got_refcounts != NULL
2655 && local_got_refcounts[r_symndx] > 0)
2656 local_got_refcounts[r_symndx] -= 1;
2657 changed_contents = TRUE;
2658 changed_relocs = TRUE;
2659 }
2660 continue;
2661 }
2662
2663 indx = r_symndx - symtab_hdr->sh_info;
2664 h = elf_sym_hashes (abfd)[indx];
2665 BFD_ASSERT (h != NULL);
2666
2667 while (h->root.type == bfd_link_hash_indirect
2668 || h->root.type == bfd_link_hash_warning)
2669 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2670
3f65f599
L		 2671 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2672 avoid optimizing _DYNAMIC since ld.so may use its link-time
2673 address. */
daa67607
L		 2674 if (h->def_regular
2675 && h->type != STT_GNU_IFUNC
9637f6ef 2676 && h != htab->elf.hdynamic
daa67607
L		 2677 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2678 && bfd_get_8 (input_bfd,
2679 contents + irel->r_offset - 2) == 0x8b)
2680 {
2681 bfd_put_8 (output_bfd, 0x8d,
2682 contents + irel->r_offset - 2);
2683 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2684 if (h->got.refcount > 0)
2685 h->got.refcount -= 1;
2686 changed_contents = TRUE;
2687 changed_relocs = TRUE;
2688 }
2689 }
2690
2691 if (contents != NULL
2692 && elf_section_data (sec)->this_hdr.contents != contents)
2693 {
2694 if (!changed_contents && !link_info->keep_memory)
2695 free (contents);
2696 else
2697 {
2698 /* Cache the section contents for elf_link_input_bfd. */
2699 elf_section_data (sec)->this_hdr.contents = contents;
2700 }
2701 }
2702
2703 if (elf_section_data (sec)->relocs != internal_relocs)
2704 {
2705 if (!changed_relocs)
2706 free (internal_relocs);
2707 else
2708 elf_section_data (sec)->relocs = internal_relocs;
2709 }
2710
2711 return TRUE;
2712
2713 error_return:
2714 if (contents != NULL
2715 && elf_section_data (sec)->this_hdr.contents != contents)
2716 free (contents);
2717 if (internal_relocs != NULL
2718 && elf_section_data (sec)->relocs != internal_relocs)
2719 free (internal_relocs);
2720 return FALSE;
2721}
2722
70256ad8
AJ		 2723/* Set the sizes of the dynamic sections. */
2724
b34976b6 2725static bfd_boolean
351f65ca
L		 2726elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2727 struct bfd_link_info *info)
70256ad8 2728{
351f65ca 2729 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 2730 bfd *dynobj;
2731 asection *s;
b34976b6 2732 bfd_boolean relocs;
c434dee6 2733 bfd *ibfd;
351f65ca 2734 const struct elf_backend_data *bed;
70256ad8 2735
351f65ca 2736 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2737 if (htab == NULL)
2738 return FALSE;
351f65ca 2739 bed = get_elf_backend_data (output_bfd);
4dfe6ac6 2740
c434dee6
AJ		 2741 dynobj = htab->elf.dynobj;
2742 if (dynobj == NULL)
2743 abort ();
70256ad8 2744
c434dee6 2745 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 2746 {
2747 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 2748 if (info->executable)
70256ad8 2749 {
3d4d4302 2750 s = bfd_get_linker_section (dynobj, ".interp");
c434dee6
AJ		 2751 if (s == NULL)
2752 abort ();
351f65ca
L		 2753 s->size = htab->dynamic_interpreter_size;
2754 s->contents = (unsigned char *) htab->dynamic_interpreter;
70256ad8
AJ		 2755 }
2756 }
70256ad8 2757
c434dee6
AJ		 2758 /* Set up .got offsets for local syms, and space for local dynamic
2759 relocs. */
2760 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
70256ad8 2761 {
c434dee6
AJ		 2762 bfd_signed_vma *local_got;
2763 bfd_signed_vma *end_local_got;
bffbf940 2764 char *local_tls_type;
67a4f2b7 2765 bfd_vma *local_tlsdesc_gotent;
c434dee6
AJ		 2766 bfd_size_type locsymcount;
2767 Elf_Internal_Shdr *symtab_hdr;
2768 asection *srel;
70256ad8 2769
0ffa91dd 2770 if (! is_x86_64_elf (ibfd))
70256ad8
AJ		 2771 continue;
2772
c434dee6 2773 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 2774 {
e03a8ed8 2775 struct elf_dyn_relocs *p;
c434dee6 2776
daa67607
L		 2777 if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info))
2778 return FALSE;
2779
e03a8ed8 2780 for (p = (struct elf_dyn_relocs *)
e81d3500 2781 (elf_section_data (s)->local_dynrel);
c434dee6
AJ		 2782 p != NULL;
2783 p = p->next)
70256ad8 2784 {
c434dee6
AJ		 2785 if (!bfd_is_abs_section (p->sec)
2786 && bfd_is_abs_section (p->sec->output_section))
2787 {
2788 /* Input section has been discarded, either because
2789 it is a copy of a linkonce section or due to
2790 linker script /DISCARD/, so we'll be discarding
2791 the relocs too. */
2792 }
2793 else if (p->count != 0)
2794 {
2795 srel = elf_section_data (p->sec)->sreloc;
351f65ca 2796 srel->size += p->count * bed->s->sizeof_rela;
4b819e1f
L		 2797 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2798 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 2799 {
2800 info->flags |= DF_TEXTREL;
2801 if (info->warn_shared_textrel && info->shared)
2802 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2803 p->sec->owner, p->sec);
b70321a2 2804 }
c434dee6 2805 }
70256ad8
AJ		 2806 }
2807 }
c434dee6
AJ		 2808
2809 local_got = elf_local_got_refcounts (ibfd);
2810 if (!local_got)
2811 continue;
2812
0ffa91dd 2813 symtab_hdr = &elf_symtab_hdr (ibfd);
c434dee6
AJ		 2814 locsymcount = symtab_hdr->sh_info;
2815 end_local_got = local_got + locsymcount;
351f65ca
L		 2816 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
2817 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 2818 s = htab->elf.sgot;
2819 srel = htab->elf.srelgot;
67a4f2b7
AO		 2820 for (; local_got < end_local_got;
2821 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
70256ad8 2822 {
67a4f2b7 2823 *local_tlsdesc_gotent = (bfd_vma) -1;
c434dee6 2824 if (*local_got > 0)
70256ad8 2825 {
67a4f2b7
AO		 2826 if (GOT_TLS_GDESC_P (*local_tls_type))
2827 {
6de2ae4a 2828 *local_tlsdesc_gotent = htab->elf.sgotplt->size
351f65ca 2829 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2830 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 2831 *local_got = (bfd_vma) -2;
2832 }
2833 if (! GOT_TLS_GDESC_P (*local_tls_type)
2834 || GOT_TLS_GD_P (*local_tls_type))
2835 {
2836 *local_got = s->size;
2837 s->size += GOT_ENTRY_SIZE;
2838 if (GOT_TLS_GD_P (*local_tls_type))
2839 s->size += GOT_ENTRY_SIZE;
2840 }
bffbf940 2841 if (info->shared
67a4f2b7 2842 || GOT_TLS_GD_ANY_P (*local_tls_type)
bffbf940 2843 || *local_tls_type == GOT_TLS_IE)
67a4f2b7
AO		 2844 {
2845 if (GOT_TLS_GDESC_P (*local_tls_type))
2846 {
6de2ae4a 2847 htab->elf.srelplt->size
351f65ca 2848 += bed->s->sizeof_rela;
67a4f2b7
AO		 2849 htab->tlsdesc_plt = (bfd_vma) -1;
2850 }
2851 if (! GOT_TLS_GDESC_P (*local_tls_type)
2852 || GOT_TLS_GD_P (*local_tls_type))
351f65ca 2853 srel->size += bed->s->sizeof_rela;
67a4f2b7 2854 }
70256ad8
AJ		 2855 }
2856 else
c434dee6
AJ		 2857 *local_got = (bfd_vma) -1;
2858 }
2859 }
70256ad8 2860
bffbf940
JJ		 2861 if (htab->tls_ld_got.refcount > 0)
2862 {
2863 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2864 relocs. */
6de2ae4a
L		 2865 htab->tls_ld_got.offset = htab->elf.sgot->size;
2866 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
351f65ca 2867 htab->elf.srelgot->size += bed->s->sizeof_rela;
bffbf940
JJ		 2868 }
2869 else
2870 htab->tls_ld_got.offset = -1;
2871
c434dee6
AJ		 2872 /* Allocate global sym .plt and .got entries, and space for global
2873 sym dynamic relocs. */
351f65ca 2874 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
eb4ff4d6 2875 info);
c434dee6 2876
c25bc9fc
L		 2877 /* Allocate .plt and .got entries, and space for local symbols. */
2878 htab_traverse (htab->loc_hash_table,
351f65ca 2879 elf_x86_64_allocate_local_dynrelocs,
c25bc9fc
L		 2880 info);
2881
67a4f2b7
AO		 2882 /* For every jump slot reserved in the sgotplt, reloc_count is
2883 incremented. However, when we reserve space for TLS descriptors,
2884 it's not incremented, so in order to compute the space reserved
2885 for them, it suffices to multiply the reloc count by the jump
e1f98742
L		 2886 slot size.
2887
2888 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2889 so that R_X86_64_IRELATIVE entries come last. */
6de2ae4a 2890 if (htab->elf.srelplt)
e1f98742
L		 2891 {
2892 htab->sgotplt_jump_table_size
2893 = elf_x86_64_compute_jump_table_size (htab);
2894 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2895 }
2896 else if (htab->elf.irelplt)
2897 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
67a4f2b7
AO		 2898
2899 if (htab->tlsdesc_plt)
2900 {
2901 /* If we're not using lazy TLS relocations, don't generate the
2902 PLT and GOT entries they require. */
2903 if ((info->flags & DF_BIND_NOW))
2904 htab->tlsdesc_plt = 0;
2905 else
2906 {
6de2ae4a
L		 2907 htab->tlsdesc_got = htab->elf.sgot->size;
2908 htab->elf.sgot->size += GOT_ENTRY_SIZE;
67a4f2b7
AO		 2909 /* Reserve room for the initial entry.
2910 FIXME: we could probably do away with it in this case. */
6de2ae4a 2911 if (htab->elf.splt->size == 0)
eed180f8 2912 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
6de2ae4a 2913 htab->tlsdesc_plt = htab->elf.splt->size;
eed180f8 2914 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
67a4f2b7
AO		 2915 }
2916 }
2917
a7b16ceb
L		 2918 if (htab->elf.sgotplt)
2919 {
2920 /* Don't allocate .got.plt section if there are no GOT nor PLT
eed180f8 2921 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 2922 if ((htab->elf.hgot == NULL
2923 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 2924 && (htab->elf.sgotplt->size
2925 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 2926 && (htab->elf.splt == NULL
2927 || htab->elf.splt->size == 0)
2928 && (htab->elf.sgot == NULL
2929 || htab->elf.sgot->size == 0)
2930 && (htab->elf.iplt == NULL
2931 || htab->elf.iplt->size == 0)
2932 && (htab->elf.igotplt == NULL
2933 || htab->elf.igotplt->size == 0))
2934 htab->elf.sgotplt->size = 0;
2935 }
2936
9a2a56cc
AM		 2937 if (htab->plt_eh_frame != NULL
2938 && htab->elf.splt != NULL
2939 && htab->elf.splt->size != 0
2940 && !bfd_is_abs_section (htab->elf.splt->output_section)
2941 && _bfd_elf_eh_frame_present (info))
2942 {
2943 const struct elf_x86_64_backend_data *arch_data
2944 = (const struct elf_x86_64_backend_data *) bed->arch_data;
2945 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
2946 }
2947
c434dee6
AJ		 2948 /* We now have determined the sizes of the various dynamic sections.
2949 Allocate memory for them. */
b34976b6 2950 relocs = FALSE;
c434dee6
AJ		 2951 for (s = dynobj->sections; s != NULL; s = s->next)
2952 {
2953 if ((s->flags & SEC_LINKER_CREATED) == 0)
2954 continue;
2955
6de2ae4a
L		 2956 if (s == htab->elf.splt
2957 || s == htab->elf.sgot
2958 || s == htab->elf.sgotplt
2959 || s == htab->elf.iplt
2960 || s == htab->elf.igotplt
9a2a56cc 2961 || s == htab->plt_eh_frame
75ff4589 2962 || s == htab->sdynbss)
c434dee6
AJ		 2963 {
2964 /* Strip this section if we don't need it; see the
2965 comment below. */
2966 }
0112cd26 2967 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
c434dee6 2968 {
6de2ae4a 2969 if (s->size != 0 && s != htab->elf.srelplt)
b34976b6 2970 relocs = TRUE;
c434dee6
AJ		 2971
2972 /* We use the reloc_count field as a counter if we need
2973 to copy relocs into the output file. */
6de2ae4a 2974 if (s != htab->elf.srelplt)
67a4f2b7 2975 s->reloc_count = 0;
70256ad8 2976 }
c434dee6 2977 else
70256ad8
AJ		 2978 {
2979 /* It's not one of our sections, so don't allocate space. */
2980 continue;
2981 }
2982
eea6121a 2983 if (s->size == 0)
70256ad8 2984 {
c434dee6
AJ		 2985 /* If we don't need this section, strip it from the
2986 output file. This is mostly to handle .rela.bss and
2987 .rela.plt. We must create both sections in
2988 create_dynamic_sections, because they must be created
2989 before the linker maps input sections to output
2990 sections. The linker does that before
2991 adjust_dynamic_symbol is called, and it is that
2992 function which decides whether anything needs to go
2993 into these sections. */
2994
8423293d 2995 s->flags |= SEC_EXCLUDE;
70256ad8
AJ		 2996 continue;
2997 }
2998
c456f082
AM		 2999 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3000 continue;
3001
70256ad8
AJ		 3002 /* Allocate memory for the section contents. We use bfd_zalloc
3003 here in case unused entries are not reclaimed before the
3004 section's contents are written out. This should not happen,
3005 but this way if it does, we get a R_X86_64_NONE reloc instead
3006 of garbage. */
eea6121a 3007 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
c434dee6 3008 if (s->contents == NULL)
b34976b6 3009 return FALSE;
70256ad8
AJ		 3010 }
3011
e41b3a13 3012 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 3013 && htab->plt_eh_frame->contents != NULL)
3014 {
3015 const struct elf_x86_64_backend_data *arch_data
3016 = (const struct elf_x86_64_backend_data *) bed->arch_data;
3017
3018 memcpy (htab->plt_eh_frame->contents,
3019 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3020 bfd_put_32 (dynobj, htab->elf.splt->size,
3021 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3022 }
e41b3a13 3023
c434dee6 3024 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 3025 {
3026 /* Add some entries to the .dynamic section. We fill in the
351f65ca 3027 values later, in elf_x86_64_finish_dynamic_sections, but we
70256ad8 3028 must add the entries now so that we get the correct size for
407443a3 3029 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 3030 dynamic linker and used by the debugger. */
dc810e39 3031#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3032 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3033
36af4a4e 3034 if (info->executable)
70256ad8 3035 {
dc810e39 3036 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3037 return FALSE;
70256ad8
AJ		 3038 }
3039
6de2ae4a 3040 if (htab->elf.splt->size != 0)
70256ad8 3041 {
dc810e39
AM		 3042 if (!add_dynamic_entry (DT_PLTGOT, 0)
3043 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3044 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3045 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 3046 return FALSE;
67a4f2b7
AO		 3047
3048 if (htab->tlsdesc_plt
3049 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3050 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3051 return FALSE;
70256ad8
AJ		 3052 }
3053
3054 if (relocs)
3055 {
dc810e39
AM		 3056 if (!add_dynamic_entry (DT_RELA, 0)
3057 || !add_dynamic_entry (DT_RELASZ, 0)
351f65ca 3058 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
b34976b6 3059 return FALSE;
70256ad8 3060
c434dee6
AJ		 3061 /* If any dynamic relocs apply to a read-only section,
3062 then we need a DT_TEXTREL entry. */
3063 if ((info->flags & DF_TEXTREL) == 0)
eed180f8 3064 elf_link_hash_traverse (&htab->elf,
351f65ca 3065 elf_x86_64_readonly_dynrelocs,
eb4ff4d6 3066 info);
c434dee6
AJ		 3067
3068 if ((info->flags & DF_TEXTREL) != 0)
3069 {
3070 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3071 return FALSE;
c434dee6 3072 }
70256ad8
AJ		 3073 }
3074 }
dc810e39 3075#undef add_dynamic_entry
70256ad8 3076
b34976b6 3077 return TRUE;
70256ad8
AJ		 3078}
3079
67a4f2b7 3080static bfd_boolean
351f65ca
L		 3081elf_x86_64_always_size_sections (bfd *output_bfd,
3082 struct bfd_link_info *info)
67a4f2b7
AO		 3083{
3084 asection *tls_sec = elf_hash_table (info)->tls_sec;
3085
3086 if (tls_sec)
3087 {
3088 struct elf_link_hash_entry *tlsbase;
3089
3090 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3091 "_TLS_MODULE_BASE_",
3092 FALSE, FALSE, FALSE);
3093
3094 if (tlsbase && tlsbase->type == STT_TLS)
3095 {
351f65ca 3096 struct elf_x86_64_link_hash_table *htab;
67a4f2b7
AO		 3097 struct bfd_link_hash_entry *bh = NULL;
3098 const struct elf_backend_data *bed
3099 = get_elf_backend_data (output_bfd);
3100
351f65ca 3101 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3102 if (htab == NULL)
3103 return FALSE;
3104
67a4f2b7
AO		 3105 if (!(_bfd_generic_link_add_one_symbol
3106 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3107 tls_sec, 0, NULL, FALSE,
3108 bed->collect, &bh)))
3109 return FALSE;
9f03412a 3110
4dfe6ac6 3111 htab->tls_module_base = bh;
9f03412a 3112
67a4f2b7
AO		 3113 tlsbase = (struct elf_link_hash_entry *)bh;
3114 tlsbase->def_regular = 1;
3115 tlsbase->other = STV_HIDDEN;
3116 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3117 }
3118 }
3119
3120 return TRUE;
3121}
3122
9f03412a
AO		 3123/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3124 executables. Rather than setting it to the beginning of the TLS
3125 section, we have to set it to the end. This function may be called
3126 multiple times, it is idempotent. */
3127
3128static void
351f65ca 3129elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3130{
351f65ca 3131 struct elf_x86_64_link_hash_table *htab;
9f03412a
AO		 3132 struct bfd_link_hash_entry *base;
3133
3134 if (!info->executable)
3135 return;
3136
351f65ca 3137 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3138 if (htab == NULL)
3139 return;
9f03412a 3140
4dfe6ac6
NC		 3141 base = htab->tls_module_base;
3142 if (base == NULL)
9f03412a
AO		 3143 return;
3144
4dfe6ac6 3145 base->u.def.value = htab->elf.tls_size;
9f03412a
AO		 3146}
3147
bffbf940
JJ		 3148/* Return the base VMA address which should be subtracted from real addresses
3149 when resolving @dtpoff relocation.
3150 This is PT_TLS segment p_vaddr. */
3151
3152static bfd_vma
351f65ca 3153elf_x86_64_dtpoff_base (struct bfd_link_info *info)
bffbf940 3154{
e1918d23
AM		 3155 /* If tls_sec is NULL, we should have signalled an error already. */
3156 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 3157 return 0;
e1918d23 3158 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ		 3159}
3160
3161/* Return the relocation value for @tpoff relocation
3162 if STT_TLS virtual address is ADDRESS. */
3163
3164static bfd_vma
351f65ca 3165elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 3166{
e1918d23 3167 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3168 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3169 bfd_vma static_tls_size;
bffbf940
JJ		 3170
3171 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 3172 if (htab->tls_sec == NULL)
bffbf940 3173 return 0;
7dc98aea
RO		 3174
3175 /* Consider special static TLS alignment requirements. */
3176 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3177 return address - static_tls_size - htab->tls_sec->vma;
bffbf940
JJ		 3178}
3179
90f487df
L		 3180/* Is the instruction before OFFSET in CONTENTS a 32bit relative
3181 branch? */
3182
3183static bfd_boolean
3184is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3185{
3186 /* Opcode Instruction
3187 0xe8 call
3188 0xe9 jump
3189 0x0f 0x8x conditional jump */
3190 return ((offset > 0
3191 && (contents [offset - 1] == 0xe8
3192 || contents [offset - 1] == 0xe9))
3193 || (offset > 1
3194 && contents [offset - 2] == 0x0f
3195 && (contents [offset - 1] & 0xf0) == 0x80));
3196}
3197
8d88c4ca
NC		 3198/* Relocate an x86_64 ELF section. */
3199
b34976b6 3200static bfd_boolean
351f65ca
L		 3201elf_x86_64_relocate_section (bfd *output_bfd,
3202 struct bfd_link_info *info,
3203 bfd *input_bfd,
3204 asection *input_section,
3205 bfd_byte *contents,
3206 Elf_Internal_Rela *relocs,
3207 Elf_Internal_Sym *local_syms,
3208 asection **local_sections)
8d88c4ca 3209{
351f65ca 3210 struct elf_x86_64_link_hash_table *htab;
8d88c4ca
NC		 3211 Elf_Internal_Shdr *symtab_hdr;
3212 struct elf_link_hash_entry **sym_hashes;
3213 bfd_vma *local_got_offsets;
67a4f2b7 3214 bfd_vma *local_tlsdesc_gotents;
c434dee6 3215 Elf_Internal_Rela *rel;
8d88c4ca 3216 Elf_Internal_Rela *relend;
eed180f8 3217 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
8d88c4ca 3218
0ffa91dd
NC		 3219 BFD_ASSERT (is_x86_64_elf (input_bfd));
3220
351f65ca 3221 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3222 if (htab == NULL)
3223 return FALSE;
0ffa91dd 3224 symtab_hdr = &elf_symtab_hdr (input_bfd);
8d88c4ca
NC		 3225 sym_hashes = elf_sym_hashes (input_bfd);
3226 local_got_offsets = elf_local_got_offsets (input_bfd);
351f65ca 3227 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
8d88c4ca 3228
351f65ca 3229 elf_x86_64_set_tls_module_base (info);
9f03412a 3230
c434dee6 3231 rel = relocs;
8d88c4ca 3232 relend = relocs + input_section->reloc_count;
c434dee6 3233 for (; rel < relend; rel++)
8d88c4ca 3234 {
bffbf940 3235 unsigned int r_type;
8d88c4ca
NC		 3236 reloc_howto_type *howto;
3237 unsigned long r_symndx;
3238 struct elf_link_hash_entry *h;
3239 Elf_Internal_Sym *sym;
3240 asection *sec;
67a4f2b7 3241 bfd_vma off, offplt;
8d88c4ca 3242 bfd_vma relocation;
b34976b6 3243 bfd_boolean unresolved_reloc;
8d88c4ca 3244 bfd_reloc_status_type r;
bffbf940 3245 int tls_type;
cbe950e9 3246 asection *base_got;
8d88c4ca 3247
351f65ca 3248 r_type = ELF32_R_TYPE (rel->r_info);
fe4770f4
AJ		 3249 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3250 || r_type == (int) R_X86_64_GNU_VTENTRY)
3251 continue;
8d88c4ca 3252
bffbf940 3253 if (r_type >= R_X86_64_max)
8da6118f
KH		 3254 {
3255 bfd_set_error (bfd_error_bad_value);
b34976b6 3256 return FALSE;
8da6118f 3257 }
8d88c4ca 3258
d7921315 3259 if (r_type != (int) R_X86_64_32
eed180f8 3260 || ABI_64_P (output_bfd))
d7921315
L		 3261 howto = x86_64_elf_howto_table + r_type;
3262 else
3263 howto = (x86_64_elf_howto_table
3264 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
351f65ca 3265 r_symndx = htab->r_sym (rel->r_info);
8d88c4ca
NC		 3266 h = NULL;
3267 sym = NULL;
3268 sec = NULL;
b34976b6 3269 unresolved_reloc = FALSE;
8d88c4ca 3270 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH		 3271 {
3272 sym = local_syms + r_symndx;
3273 sec = local_sections[r_symndx];
c434dee6 3274
c25bc9fc
L		 3275 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3276 &sec, rel);
3277
3278 /* Relocate against local STT_GNU_IFUNC symbol. */
1f85278f 3279 if (!info->relocatable
351f65ca 3280 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc 3281 {
351f65ca
L		 3282 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3283 rel, FALSE);
c25bc9fc
L		 3284 if (h == NULL)
3285 abort ();
3286
eed180f8 3287 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3288 h->root.u.def.value = sym->st_value;
3289 h->root.u.def.section = sec;
3290 }
8da6118f 3291 }
8d88c4ca 3292 else
8da6118f 3293 {
c9736ba0 3294 bfd_boolean warned ATTRIBUTE_UNUSED;
c434dee6 3295
b2a8e766
AM		 3296 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3297 r_symndx, symtab_hdr, sym_hashes,
3298 h, sec, relocation,
3299 unresolved_reloc, warned);
8da6118f 3300 }
ab96bf03 3301
dbaa2011 3302 if (sec != NULL && discarded_section (sec))
0672748a 3303 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 3304 rel, 1, relend, howto, 0, contents);
ab96bf03
AM		 3305
3306 if (info->relocatable)
3307 continue;
3308
64d25c44
L		 3309 if (rel->r_addend == 0
3310 && r_type == R_X86_64_64
3311 && !ABI_64_P (output_bfd))
3312 {
3313 /* For x32, treat R_X86_64_64 like R_X86_64_32 and zero-extend
3314 it to 64bit if addend is zero. */
3315 r_type = R_X86_64_32;
3316 memset (contents + rel->r_offset + 4, 0, 4);
3317 }
3318
cbe950e9
L		 3319 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3320 it here if it is defined in a non-shared object. */
3321 if (h != NULL
3322 && h->type == STT_GNU_IFUNC
3323 && h->def_regular)
3324 {
3325 asection *plt;
3326 bfd_vma plt_index;
4c544807 3327 const char *name;
cbe950e9
L		 3328
3329 if ((input_section->flags & SEC_ALLOC) == 0
3330 || h->plt.offset == (bfd_vma) -1)
3331 abort ();
3332
3333 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3334 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
cbe950e9
L		 3335 relocation = (plt->output_section->vma
3336 + plt->output_offset + h->plt.offset);
3337
3338 switch (r_type)
3339 {
3340 default:
4c544807
L		 3341 if (h->root.root.string)
3342 name = h->root.root.string;
3343 else
3344 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3345 NULL);
cbe950e9
L		 3346 (*_bfd_error_handler)
3347 (_("%B: relocation %s against STT_GNU_IFUNC "
3348 "symbol `%s' isn't handled by %s"), input_bfd,
3349 x86_64_elf_howto_table[r_type].name,
4c544807 3350 name, __FUNCTION__);
cbe950e9
L		 3351 bfd_set_error (bfd_error_bad_value);
3352 return FALSE;
3353
3354 case R_X86_64_32S:
710ab287 3355 if (info->shared)
cbe950e9 3356 abort ();
710ab287
L		 3357 goto do_relocation;
3358
248775ba
L		 3359 case R_X86_64_32:
3360 if (ABI_64_P (output_bfd))
3361 goto do_relocation;
17672001 3362 /* FALLTHROUGH */
eed180f8 3363 case R_X86_64_64:
710ab287
L		 3364 if (rel->r_addend != 0)
3365 {
4c544807
L		 3366 if (h->root.root.string)
3367 name = h->root.root.string;
3368 else
3369 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3370 sym, NULL);
710ab287
L		 3371 (*_bfd_error_handler)
3372 (_("%B: relocation %s against STT_GNU_IFUNC "
3373 "symbol `%s' has non-zero addend: %d"),
3374 input_bfd, x86_64_elf_howto_table[r_type].name,
4c544807 3375 name, rel->r_addend);
710ab287
L		 3376 bfd_set_error (bfd_error_bad_value);
3377 return FALSE;
3378 }
3379
3380 /* Generate dynamic relcoation only when there is a
c293fa49 3381 non-GOT reference in a shared object. */
710ab287
L		 3382 if (info->shared && h->non_got_ref)
3383 {
3384 Elf_Internal_Rela outrel;
710ab287
L		 3385 asection *sreloc;
3386
c25bc9fc
L		 3387 /* Need a dynamic relocation to get the real function
3388 address. */
710ab287
L		 3389 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3390 info,
3391 input_section,
3392 rel->r_offset);
3393 if (outrel.r_offset == (bfd_vma) -1
3394 || outrel.r_offset == (bfd_vma) -2)
3395 abort ();
3396
3397 outrel.r_offset += (input_section->output_section->vma
3398 + input_section->output_offset);
3399
3400 if (h->dynindx == -1
44c4ea11
L		 3401 || h->forced_local
3402 || info->executable)
710ab287
L		 3403 {
3404 /* This symbol is resolved locally. */
56b8aada
L		 3405 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3406 outrel.r_addend = (h->root.u.def.value
3407 + h->root.u.def.section->output_section->vma
3408 + h->root.u.def.section->output_offset);
710ab287
L		 3409 }
3410 else
3411 {
351f65ca 3412 outrel.r_info = htab->r_info (h->dynindx, r_type);
710ab287
L		 3413 outrel.r_addend = 0;
3414 }
3415
6de2ae4a 3416 sreloc = htab->elf.irelifunc;
351f65ca 3417 elf_append_rela (output_bfd, sreloc, &outrel);
710ab287
L		 3418
3419 /* If this reloc is against an external symbol, we
3420 do not want to fiddle with the addend. Otherwise,
3421 we need to include the symbol value so that it
3422 becomes an addend for the dynamic reloc. For an
3423 internal symbol, we have updated addend. */
56b8aada 3424 continue;
710ab287 3425 }
17672001 3426 /* FALLTHROUGH */
cbe950e9
L		 3427 case R_X86_64_PC32:
3428 case R_X86_64_PC64:
3429 case R_X86_64_PLT32:
3430 goto do_relocation;
3431
3432 case R_X86_64_GOTPCREL:
3433 case R_X86_64_GOTPCREL64:
6de2ae4a 3434 base_got = htab->elf.sgot;
cbe950e9
L		 3435 off = h->got.offset;
3436
7afd84dc 3437 if (base_got == NULL)
cbe950e9
L		 3438 abort ();
3439
7afd84dc 3440 if (off == (bfd_vma) -1)
cbe950e9 3441 {
7afd84dc
L		 3442 /* We can't use h->got.offset here to save state, or
3443 even just remember the offset, as finish_dynamic_symbol
3444 would use that as offset into .got. */
cbe950e9 3445
6de2ae4a 3446 if (htab->elf.splt != NULL)
7afd84dc 3447 {
eed180f8 3448 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 3449 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3450 base_got = htab->elf.sgotplt;
7afd84dc 3451 }
cbe950e9
L		 3452 else
3453 {
eed180f8 3454 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3455 off = plt_index * GOT_ENTRY_SIZE;
6de2ae4a 3456 base_got = htab->elf.igotplt;
7afd84dc
L		 3457 }
3458
3459 if (h->dynindx == -1
3460 || h->forced_local
3461 || info->symbolic)
3462 {
eed180f8 3463 /* This references the local defitionion. We must
7afd84dc 3464 initialize this entry in the global offset table.
eed180f8 3465 Since the offset must always be a multiple of 8,
7afd84dc
L		 3466 we use the least significant bit to record
3467 whether we have initialized it already.
3468
3469 When doing a dynamic link, we create a .rela.got
3470 relocation entry to initialize the value. This
3471 is done in the finish_dynamic_symbol routine. */
3472 if ((off & 1) != 0)
3473 off &= ~1;
3474 else
3475 {
3476 bfd_put_64 (output_bfd, relocation,
3477 base_got->contents + off);
3478 /* Note that this is harmless for the GOTPLT64
3479 case, as -1 | 1 still is -1. */
3480 h->got.offset |= 1;
3481 }
cbe950e9
L		 3482 }
3483 }
3484
3485 relocation = (base_got->output_section->vma
3486 + base_got->output_offset + off);
3487
cbe950e9
L		 3488 goto do_relocation;
3489 }
3490 }
3491
70256ad8
AJ		 3492 /* When generating a shared object, the relocations handled here are
3493 copied into the output file to be resolved at run time. */
3494 switch (r_type)
3495 {
3496 case R_X86_64_GOT32:
7b81dfbb 3497 case R_X86_64_GOT64:
70256ad8
AJ		 3498 /* Relocation is to the entry for this symbol in the global
3499 offset table. */
70256ad8 3500 case R_X86_64_GOTPCREL:
7b81dfbb
AJ		 3501 case R_X86_64_GOTPCREL64:
3502 /* Use global offset table entry as symbol value. */
3503 case R_X86_64_GOTPLT64:
3504 /* This is the same as GOT64 for relocation purposes, but
3505 indicates the existence of a PLT entry. The difficulty is,
3506 that we must calculate the GOT slot offset from the PLT
3507 offset, if this symbol got a PLT entry (it was global).
3508 Additionally if it's computed from the PLT entry, then that
3509 GOT offset is relative to .got.plt, not to .got. */
6de2ae4a 3510 base_got = htab->elf.sgot;
7b81dfbb 3511
6de2ae4a 3512 if (htab->elf.sgot == NULL)
c434dee6 3513 abort ();
053579d7 3514
51e0a107 3515 if (h != NULL)
70256ad8 3516 {
b34976b6 3517 bfd_boolean dyn;
c434dee6
AJ		 3518
3519 off = h->got.offset;
7b81dfbb 3520 if (h->needs_plt
eed180f8 3521 && h->plt.offset != (bfd_vma)-1
7b81dfbb
AJ		 3522 && off == (bfd_vma)-1)
3523 {
3524 /* We can't use h->got.offset here to save
3525 state, or even just remember the offset, as
3526 finish_dynamic_symbol would use that as offset into
3527 .got. */
eed180f8 3528 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
7b81dfbb 3529 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3530 base_got = htab->elf.sgotplt;
7b81dfbb
AJ		 3531 }
3532
c434dee6 3533 dyn = htab->elf.dynamic_sections_created;
51e0a107 3534
27482721 3535 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
51e0a107 3536 || (info->shared
27482721 3537 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ		 3538 || (ELF_ST_VISIBILITY (h->other)
3539 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH		 3540 {
3541 /* This is actually a static link, or it is a -Bsymbolic
3542 link and the symbol is defined locally, or the symbol
407443a3 3543 was forced to be local because of a version file. We
51e0a107
JH		 3544 must initialize this entry in the global offset table.
3545 Since the offset must always be a multiple of 8, we
3546 use the least significant bit to record whether we
3547 have initialized it already.
3548
3549 When doing a dynamic link, we create a .rela.got
407443a3
AJ		 3550 relocation entry to initialize the value. This is
3551 done in the finish_dynamic_symbol routine. */
51e0a107
JH		 3552 if ((off & 1) != 0)
3553 off &= ~1;
3554 else
3555 {
3556 bfd_put_64 (output_bfd, relocation,
7b81dfbb
AJ		 3557 base_got->contents + off);
3558 /* Note that this is harmless for the GOTPLT64 case,
eed180f8 3559 as -1 | 1 still is -1. */
51e0a107
JH		 3560 h->got.offset |= 1;
3561 }
3562 }
053579d7 3563 else
b34976b6 3564 unresolved_reloc = FALSE;
70256ad8 3565 }
51e0a107
JH		 3566 else
3567 {
c434dee6
AJ		 3568 if (local_got_offsets == NULL)
3569 abort ();
51e0a107
JH		 3570
3571 off = local_got_offsets[r_symndx];
3572
3573 /* The offset must always be a multiple of 8. We use
407443a3
AJ		 3574 the least significant bit to record whether we have
3575 already generated the necessary reloc. */
51e0a107
JH		 3576 if ((off & 1) != 0)
3577 off &= ~1;
3578 else
3579 {
c434dee6 3580 bfd_put_64 (output_bfd, relocation,
7b81dfbb 3581 base_got->contents + off);
51e0a107
JH		 3582
3583 if (info->shared)
3584 {
947216bf 3585 asection *s;
51e0a107 3586 Elf_Internal_Rela outrel;
70256ad8 3587
51e0a107
JH		 3588 /* We need to generate a R_X86_64_RELATIVE reloc
3589 for the dynamic linker. */
6de2ae4a 3590 s = htab->elf.srelgot;
947216bf 3591 if (s == NULL)
c434dee6 3592 abort ();
51e0a107 3593
7b81dfbb
AJ		 3594 outrel.r_offset = (base_got->output_section->vma
3595 + base_got->output_offset
51e0a107 3596 + off);
351f65ca 3597 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
51e0a107 3598 outrel.r_addend = relocation;
351f65ca 3599 elf_append_rela (output_bfd, s, &outrel);
51e0a107
JH		 3600 }
3601
3602 local_got_offsets[r_symndx] |= 1;
3603 }
51e0a107 3604 }
6a2bda3f 3605
c434dee6
AJ		 3606 if (off >= (bfd_vma) -2)
3607 abort ();
3608
7b81dfbb
AJ		 3609 relocation = base_got->output_section->vma
3610 + base_got->output_offset + off;
3611 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
6de2ae4a
L		 3612 relocation -= htab->elf.sgotplt->output_section->vma
3613 - htab->elf.sgotplt->output_offset;
c434dee6 3614
70256ad8
AJ		 3615 break;
3616
d6ab8113
JB		 3617 case R_X86_64_GOTOFF64:
3618 /* Relocation is relative to the start of the global offset
3619 table. */
3620
3621 /* Check to make sure it isn't a protected function symbol
3622 for shared library since it may not be local when used
3623 as function address. */
bdb892b9 3624 if (!info->executable
d6ab8113 3625 && h
bdb892b9 3626 && !SYMBOLIC_BIND (info, h)
d6ab8113
JB		 3627 && h->def_regular
3628 && h->type == STT_FUNC
3629 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3630 {
3631 (*_bfd_error_handler)
3632 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3633 input_bfd, h->root.root.string);
3634 bfd_set_error (bfd_error_bad_value);
3635 return FALSE;
3636 }
3637
3638 /* Note that sgot is not involved in this
3639 calculation. We always want the start of .got.plt. If we
3640 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3641 permitted by the ABI, we might have to change this
3642 calculation. */
6de2ae4a
L		 3643 relocation -= htab->elf.sgotplt->output_section->vma
3644 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 3645 break;
3646
3647 case R_X86_64_GOTPC32:
7b81dfbb 3648 case R_X86_64_GOTPC64:
d6ab8113 3649 /* Use global offset table as symbol value. */
6de2ae4a
L		 3650 relocation = htab->elf.sgotplt->output_section->vma
3651 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 3652 unresolved_reloc = FALSE;
3653 break;
7b81dfbb
AJ		 3654
3655 case R_X86_64_PLTOFF64:
3656 /* Relocation is PLT entry relative to GOT. For local
3657 symbols it's the symbol itself relative to GOT. */
eed180f8 3658 if (h != NULL
7b81dfbb
AJ		 3659 /* See PLT32 handling. */
3660 && h->plt.offset != (bfd_vma) -1
6de2ae4a 3661 && htab->elf.splt != NULL)
7b81dfbb 3662 {
6de2ae4a
L		 3663 relocation = (htab->elf.splt->output_section->vma
3664 + htab->elf.splt->output_offset
7b81dfbb
AJ		 3665 + h->plt.offset);
3666 unresolved_reloc = FALSE;
3667 }
3668
6de2ae4a
L		 3669 relocation -= htab->elf.sgotplt->output_section->vma
3670 + htab->elf.sgotplt->output_offset;
7b81dfbb 3671 break;
d6ab8113 3672
70256ad8
AJ		 3673 case R_X86_64_PLT32:
3674 /* Relocation is to the entry for this symbol in the
3675 procedure linkage table. */
3676
3677 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 3678 without using the procedure linkage table. */
70256ad8
AJ		 3679 if (h == NULL)
3680 break;
3681
c434dee6 3682 if (h->plt.offset == (bfd_vma) -1
6de2ae4a 3683 || htab->elf.splt == NULL)
70256ad8
AJ		 3684 {
3685 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ		 3686 happens when statically linking PIC code, or when
3687 using -Bsymbolic. */
70256ad8
AJ		 3688 break;
3689 }
3690
6de2ae4a
L		 3691 relocation = (htab->elf.splt->output_section->vma
3692 + htab->elf.splt->output_offset
70256ad8 3693 + h->plt.offset);
b34976b6 3694 unresolved_reloc = FALSE;
70256ad8
AJ		 3695 break;
3696
fd8ab9e5
AJ		 3697 case R_X86_64_PC8:
3698 case R_X86_64_PC16:
3699 case R_X86_64_PC32:
6610a52d 3700 if (info->shared
ba3bee0b 3701 && (input_section->flags & SEC_ALLOC) != 0
90f487df 3702 && (input_section->flags & SEC_READONLY) != 0
41bed6dd 3703 && h != NULL)
6610a52d 3704 {
41bed6dd
L		 3705 bfd_boolean fail = FALSE;
3706 bfd_boolean branch
3707 = (r_type == R_X86_64_PC32
3708 && is_32bit_relative_branch (contents, rel->r_offset));
3709
3710 if (SYMBOL_REFERENCES_LOCAL (info, h))
3711 {
3712 /* Symbol is referenced locally. Make sure it is
3713 defined locally or for a branch. */
3714 fail = !h->def_regular && !branch;
3715 }
90f487df 3716 else
41bed6dd
L		 3717 {
3718 /* Symbol isn't referenced locally. We only allow
3719 branch to symbol with non-default visibility. */
3720 fail = (!branch
3721 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3722 }
3723
3724 if (fail)
3725 {
3726 const char *fmt;
3727 const char *v;
3728 const char *pic = "";
3729
3730 switch (ELF_ST_VISIBILITY (h->other))
3731 {
3732 case STV_HIDDEN:
3733 v = _("hidden symbol");
3734 break;
3735 case STV_INTERNAL:
3736 v = _("internal symbol");
3737 break;
3738 case STV_PROTECTED:
3739 v = _("protected symbol");
3740 break;
3741 default:
3742 v = _("symbol");
3743 pic = _("; recompile with -fPIC");
3744 break;
3745 }
3746
3747 if (h->def_regular)
3748 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3749 else
3750 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3751
3752 (*_bfd_error_handler) (fmt, input_bfd,
3753 x86_64_elf_howto_table[r_type].name,
3754 v, h->root.root.string, pic);
3755 bfd_set_error (bfd_error_bad_value);
3756 return FALSE;
3757 }
6610a52d
L		 3758 }
3759 /* Fall through. */
3760
70256ad8
AJ		 3761 case R_X86_64_8:
3762 case R_X86_64_16:
3763 case R_X86_64_32:
d6ab8113 3764 case R_X86_64_PC64:
6b3db546 3765 case R_X86_64_64:
80643fbc 3766 /* FIXME: The ABI says the linker should make sure the value is
407443a3 3767 the same when it's zeroextended to 64 bit. */
c434dee6 3768
b1e24c02 3769 if ((input_section->flags & SEC_ALLOC) == 0)
c434dee6
AJ		 3770 break;
3771
3772 if ((info->shared
4bc6e03a
AJ		 3773 && (h == NULL
3774 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3775 || h->root.type != bfd_link_hash_undefweak)
d8045f23
NC		 3776 && (! IS_X86_64_PCREL_TYPE (r_type)
3777 || ! SYMBOL_CALLS_LOCAL (info, h)))
d40d037c
AJ		 3778 || (ELIMINATE_COPY_RELOCS
3779 && !info->shared
c434dee6
AJ		 3780 && h != NULL
3781 && h->dynindx != -1
f5385ebf
AM		 3782 && !h->non_got_ref
3783 && ((h->def_dynamic
3784 && !h->def_regular)
c434dee6 3785 || h->root.type == bfd_link_hash_undefweak
0f88be7a 3786 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ		 3787 {
3788 Elf_Internal_Rela outrel;
b34976b6 3789 bfd_boolean skip, relocate;
c434dee6 3790 asection *sreloc;
70256ad8
AJ		 3791
3792 /* When generating a shared object, these relocations
3793 are copied into the output file to be resolved at run
407443a3 3794 time. */
b34976b6
AM		 3795 skip = FALSE;
3796 relocate = FALSE;
70256ad8 3797
c629eae0
JJ		 3798 outrel.r_offset =
3799 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 3800 rel->r_offset);
c629eae0 3801 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 3802 skip = TRUE;
0fb19cbc 3803 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 3804 skip = TRUE, relocate = TRUE;
70256ad8
AJ		 3805
3806 outrel.r_offset += (input_section->output_section->vma
3807 + input_section->output_offset);
3808
3809 if (skip)
0bb2d96a 3810 memset (&outrel, 0, sizeof outrel);
c434dee6 3811
fd8ab9e5
AJ		 3812 /* h->dynindx may be -1 if this symbol was marked to
3813 become local. */
3814 else if (h != NULL
c434dee6 3815 && h->dynindx != -1
d8045f23
NC		 3816 && (IS_X86_64_PCREL_TYPE (r_type)
3817 || ! info->shared
3818 || ! SYMBOLIC_BIND (info, h)
3819 || ! h->def_regular))
70256ad8 3820 {
351f65ca 3821 outrel.r_info = htab->r_info (h->dynindx, r_type);
c434dee6 3822 outrel.r_addend = rel->r_addend;
70256ad8
AJ		 3823 }
3824 else
3825 {
c434dee6 3826 /* This symbol is local, or marked to become local. */
248775ba 3827 if (r_type == htab->pointer_r_type)
607c0e09 3828 {
b34976b6 3829 relocate = TRUE;
351f65ca 3830 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
607c0e09
AS		 3831 outrel.r_addend = relocation + rel->r_addend;
3832 }
64d25c44
L		 3833 else if (r_type == R_X86_64_64
3834 && !ABI_64_P (output_bfd))
3835 {
3836 relocate = TRUE;
3837 outrel.r_info = htab->r_info (0,
3838 R_X86_64_RELATIVE64);
3839 outrel.r_addend = relocation + rel->r_addend;
8cf0d2dd
L		 3840 /* Check addend overflow. */
3841 if ((outrel.r_addend & 0x80000000)
3842 != (rel->r_addend & 0x80000000))
3843 {
3844 const char *name;
268a8d3a 3845 int addend = rel->r_addend;
8cf0d2dd
L		 3846 if (h && h->root.root.string)
3847 name = h->root.root.string;
3848 else
3849 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3850 sym, NULL);
6f2c9068
L		 3851 if (addend < 0)
3852 (*_bfd_error_handler)
268a8d3a 3853 (_("%B: addend -0x%x in relocation %s against "
6f2c9068
L		 3854 "symbol `%s' at 0x%lx in section `%A' is "
3855 "out of range"),
3856 input_bfd, input_section, addend,
3857 x86_64_elf_howto_table[r_type].name,
3858 name, (unsigned long) rel->r_offset);
3859 else
3860 (*_bfd_error_handler)
268a8d3a 3861 (_("%B: addend 0x%x in relocation %s against "
6f2c9068
L		 3862 "symbol `%s' at 0x%lx in section `%A' is "
3863 "out of range"),
3864 input_bfd, input_section, addend,
3865 x86_64_elf_howto_table[r_type].name,
3866 name, (unsigned long) rel->r_offset);
8cf0d2dd
L		 3867 bfd_set_error (bfd_error_bad_value);
3868 return FALSE;
3869 }
64d25c44 3870 }
607c0e09
AS		 3871 else
3872 {
3873 long sindx;
3874
8517fae7 3875 if (bfd_is_abs_section (sec))
607c0e09
AS		 3876 sindx = 0;
3877 else if (sec == NULL || sec->owner == NULL)
3878 {
3879 bfd_set_error (bfd_error_bad_value);
b34976b6 3880 return FALSE;
607c0e09
AS		 3881 }
3882 else
3883 {
3884 asection *osec;
3885
74541ad4
AM		 3886 /* We are turning this relocation into one
3887 against a section symbol. It would be
3888 proper to subtract the symbol's value,
3889 osec->vma, from the emitted reloc addend,
3890 but ld.so expects buggy relocs. */
607c0e09
AS		 3891 osec = sec->output_section;
3892 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 3893 if (sindx == 0)
3894 {
3895 asection *oi = htab->elf.text_index_section;
3896 sindx = elf_section_data (oi)->dynindx;
3897 }
3898 BFD_ASSERT (sindx != 0);
607c0e09
AS		 3899 }
3900
351f65ca 3901 outrel.r_info = htab->r_info (sindx, r_type);
607c0e09
AS		 3902 outrel.r_addend = relocation + rel->r_addend;
3903 }
70256ad8
AJ		 3904 }
3905
cbe950e9 3906 sreloc = elf_section_data (input_section)->sreloc;
d8045f23 3907
62d78908
L		 3908 if (sreloc == NULL || sreloc->contents == NULL)
3909 {
3910 r = bfd_reloc_notsupported;
3911 goto check_relocation_error;
3912 }
c434dee6 3913
351f65ca 3914 elf_append_rela (output_bfd, sreloc, &outrel);
70256ad8
AJ		 3915
3916 /* If this reloc is against an external symbol, we do
3917 not want to fiddle with the addend. Otherwise, we
3918 need to include the symbol value so that it becomes
3919 an addend for the dynamic reloc. */
0f88be7a 3920 if (! relocate)
70256ad8
AJ		 3921 continue;
3922 }
3923
3924 break;
3925
bffbf940 3926 case R_X86_64_TLSGD:
67a4f2b7
AO		 3927 case R_X86_64_GOTPC32_TLSDESC:
3928 case R_X86_64_TLSDESC_CALL:
bffbf940 3929 case R_X86_64_GOTTPOFF:
bffbf940
JJ		 3930 tls_type = GOT_UNKNOWN;
3931 if (h == NULL && local_got_offsets)
351f65ca 3932 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
bffbf940 3933 else if (h != NULL)
351f65ca 3934 tls_type = elf_x86_64_hash_entry (h)->tls_type;
142411ca 3935
351f65ca
L		 3936 if (! elf_x86_64_tls_transition (info, input_bfd,
3937 input_section, contents,
3938 symtab_hdr, sym_hashes,
3939 &r_type, tls_type, rel,
3940 relend, h, r_symndx))
534a31f6 3941 return FALSE;
bffbf940
JJ		 3942
3943 if (r_type == R_X86_64_TPOFF32)
3944 {
142411ca
L		 3945 bfd_vma roff = rel->r_offset;
3946
bffbf940 3947 BFD_ASSERT (! unresolved_reloc);
142411ca 3948
351f65ca 3949 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
bffbf940 3950 {
52bc799a 3951 /* GD->LE transition. For 64bit, change
abcf1d52 3952 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
a3fadc9a 3953 .word 0x6666; rex64; call __tls_get_addr
52bc799a 3954 into:
bffbf940 3955 movq %fs:0, %rax
52bc799a
L		 3956 leaq foo@tpoff(%rax), %rax
3957 For 32bit, change
3958 leaq foo@tlsgd(%rip), %rdi
3959 .word 0x6666; rex64; call __tls_get_addr
3960 into:
3961 movl %fs:0, %eax
bffbf940 3962 leaq foo@tpoff(%rax), %rax */
52bc799a
L		 3963 if (ABI_64_P (output_bfd))
3964 memcpy (contents + roff - 4,
3965 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3966 16);
3967 else
3968 memcpy (contents + roff - 3,
3969 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3970 15);
eb4ff4d6 3971 bfd_put_32 (output_bfd,
351f65ca 3972 elf_x86_64_tpoff (info, relocation),
142411ca 3973 contents + roff + 8);
a3fadc9a 3974 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
bffbf940
JJ		 3975 rel++;
3976 continue;
3977 }
351f65ca 3978 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
67a4f2b7
AO		 3979 {
3980 /* GDesc -> LE transition.
3981 It's originally something like:
3982 leaq x@tlsdesc(%rip), %rax
3983
3984 Change it to:
c9736ba0 3985 movl $x@tpoff, %rax. */
67a4f2b7 3986
c9736ba0 3987 unsigned int val, type;
67a4f2b7 3988
67a4f2b7 3989 type = bfd_get_8 (input_bfd, contents + roff - 3);
67a4f2b7 3990 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 3991 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
3992 contents + roff - 3);
3993 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
3994 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3995 contents + roff - 1);
eb4ff4d6 3996 bfd_put_32 (output_bfd,
351f65ca 3997 elf_x86_64_tpoff (info, relocation),
67a4f2b7
AO		 3998 contents + roff);
3999 continue;
4000 }
351f65ca 4001 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
67a4f2b7
AO		 4002 {
4003 /* GDesc -> LE transition.
4004 It's originally:
4005 call *(%rax)
4006 Turn it into:
142411ca 4007 xchg %ax,%ax. */
10efb593 4008 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4009 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4010 continue;
4011 }
351f65ca 4012 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
bffbf940 4013 {
bffbf940
JJ		 4014 /* IE->LE transition:
4015 Originally it can be one of:
4016 movq foo@gottpoff(%rip), %reg
4017 addq foo@gottpoff(%rip), %reg
4018 We change it into:
4019 movq $foo, %reg
4020 leaq foo(%reg), %reg
4021 addq $foo, %reg. */
142411ca
L		 4022
4023 unsigned int val, type, reg;
4024
4025 val = bfd_get_8 (input_bfd, contents + roff - 3);
4026 type = bfd_get_8 (input_bfd, contents + roff - 2);
4027 reg = bfd_get_8 (input_bfd, contents + roff - 1);
bffbf940 4028 reg >>= 3;
bffbf940
JJ		 4029 if (type == 0x8b)
4030 {
4031 /* movq */
4032 if (val == 0x4c)
4033 bfd_put_8 (output_bfd, 0x49,
142411ca 4034 contents + roff - 3);
4a4c5f25
L		 4035 else if (!ABI_64_P (output_bfd) && val == 0x44)
4036 bfd_put_8 (output_bfd, 0x41,
4037 contents + roff - 3);
bffbf940 4038 bfd_put_8 (output_bfd, 0xc7,
142411ca 4039 contents + roff - 2);
bffbf940 4040 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4041 contents + roff - 1);
bffbf940
JJ		 4042 }
4043 else if (reg == 4)
4044 {
4045 /* addq -> addq - addressing with %rsp/%r12 is
4046 special */
4047 if (val == 0x4c)
4048 bfd_put_8 (output_bfd, 0x49,
142411ca 4049 contents + roff - 3);
4a4c5f25
L		 4050 else if (!ABI_64_P (output_bfd) && val == 0x44)
4051 bfd_put_8 (output_bfd, 0x41,
4052 contents + roff - 3);
bffbf940 4053 bfd_put_8 (output_bfd, 0x81,
142411ca 4054 contents + roff - 2);
bffbf940 4055 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4056 contents + roff - 1);
bffbf940
JJ		 4057 }
4058 else
4059 {
4060 /* addq -> leaq */
4061 if (val == 0x4c)
4062 bfd_put_8 (output_bfd, 0x4d,
142411ca 4063 contents + roff - 3);
4a4c5f25
L		 4064 else if (!ABI_64_P (output_bfd) && val == 0x44)
4065 bfd_put_8 (output_bfd, 0x45,
4066 contents + roff - 3);
bffbf940 4067 bfd_put_8 (output_bfd, 0x8d,
142411ca 4068 contents + roff - 2);
bffbf940 4069 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
142411ca 4070 contents + roff - 1);
bffbf940 4071 }
eb4ff4d6 4072 bfd_put_32 (output_bfd,
351f65ca 4073 elf_x86_64_tpoff (info, relocation),
142411ca 4074 contents + roff);
bffbf940
JJ		 4075 continue;
4076 }
142411ca
L		 4077 else
4078 BFD_ASSERT (FALSE);
bffbf940
JJ		 4079 }
4080
6de2ae4a 4081 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4082 abort ();
4083
4084 if (h != NULL)
67a4f2b7
AO		 4085 {
4086 off = h->got.offset;
351f65ca 4087 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
67a4f2b7 4088 }
bffbf940
JJ		 4089 else
4090 {
4091 if (local_got_offsets == NULL)
4092 abort ();
4093
4094 off = local_got_offsets[r_symndx];
67a4f2b7 4095 offplt = local_tlsdesc_gotents[r_symndx];
bffbf940
JJ		 4096 }
4097
4098 if ((off & 1) != 0)
4099 off &= ~1;
26e41594 4100 else
bffbf940
JJ		 4101 {
4102 Elf_Internal_Rela outrel;
bffbf940 4103 int dr_type, indx;
67a4f2b7 4104 asection *sreloc;
bffbf940 4105
6de2ae4a 4106 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4107 abort ();
4108
67a4f2b7
AO		 4109 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4110
4111 if (GOT_TLS_GDESC_P (tls_type))
4112 {
351f65ca 4113 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
67a4f2b7 4114 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
6de2ae4a
L		 4115 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4116 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4117 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4118 + offplt
4119 + htab->sgotplt_jump_table_size);
6de2ae4a 4120 sreloc = htab->elf.srelplt;
67a4f2b7 4121 if (indx == 0)
351f65ca 4122 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
67a4f2b7
AO		 4123 else
4124 outrel.r_addend = 0;
351f65ca 4125 elf_append_rela (output_bfd, sreloc, &outrel);
67a4f2b7
AO		 4126 }
4127
6de2ae4a 4128 sreloc = htab->elf.srelgot;
67a4f2b7 4129
6de2ae4a
L		 4130 outrel.r_offset = (htab->elf.sgot->output_section->vma
4131 + htab->elf.sgot->output_offset + off);
bffbf940 4132
67a4f2b7 4133 if (GOT_TLS_GD_P (tls_type))
bffbf940 4134 dr_type = R_X86_64_DTPMOD64;
67a4f2b7
AO		 4135 else if (GOT_TLS_GDESC_P (tls_type))
4136 goto dr_done;
bffbf940
JJ		 4137 else
4138 dr_type = R_X86_64_TPOFF64;
4139
6de2ae4a 4140 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
bffbf940 4141 outrel.r_addend = 0;
67a4f2b7
AO		 4142 if ((dr_type == R_X86_64_TPOFF64
4143 || dr_type == R_X86_64_TLSDESC) && indx == 0)
351f65ca
L		 4144 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4145 outrel.r_info = htab->r_info (indx, dr_type);
bffbf940 4146
351f65ca 4147 elf_append_rela (output_bfd, sreloc, &outrel);
bffbf940 4148
67a4f2b7 4149 if (GOT_TLS_GD_P (tls_type))
bffbf940
JJ		 4150 {
4151 if (indx == 0)
4152 {
d40d037c 4153 BFD_ASSERT (! unresolved_reloc);
bffbf940 4154 bfd_put_64 (output_bfd,
351f65ca 4155 relocation - elf_x86_64_dtpoff_base (info),
6de2ae4a 4156 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
bffbf940
JJ		 4157 }
4158 else
4159 {
4160 bfd_put_64 (output_bfd, 0,
6de2ae4a 4161 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4162 outrel.r_info = htab->r_info (indx,
bffbf940
JJ		 4163 R_X86_64_DTPOFF64);
4164 outrel.r_offset += GOT_ENTRY_SIZE;
351f65ca 4165 elf_append_rela (output_bfd, sreloc,
464d3bd4 4166 &outrel);
bffbf940
JJ		 4167 }
4168 }
4169
67a4f2b7 4170 dr_done:
bffbf940
JJ		 4171 if (h != NULL)
4172 h->got.offset |= 1;
4173 else
4174 local_got_offsets[r_symndx] |= 1;
4175 }
4176
67a4f2b7
AO		 4177 if (off >= (bfd_vma) -2
4178 && ! GOT_TLS_GDESC_P (tls_type))
bffbf940 4179 abort ();
351f65ca 4180 if (r_type == ELF32_R_TYPE (rel->r_info))
bffbf940 4181 {
67a4f2b7
AO		 4182 if (r_type == R_X86_64_GOTPC32_TLSDESC
4183 || r_type == R_X86_64_TLSDESC_CALL)
6de2ae4a
L		 4184 relocation = htab->elf.sgotplt->output_section->vma
4185 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4186 + offplt + htab->sgotplt_jump_table_size;
4187 else
6de2ae4a
L		 4188 relocation = htab->elf.sgot->output_section->vma
4189 + htab->elf.sgot->output_offset + off;
b34976b6 4190 unresolved_reloc = FALSE;
bffbf940 4191 }
142411ca 4192 else
67a4f2b7 4193 {
142411ca 4194 bfd_vma roff = rel->r_offset;
67a4f2b7 4195
351f65ca 4196 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
142411ca 4197 {
52bc799a 4198 /* GD->IE transition. For 64bit, change
142411ca
L		 4199 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4200 .word 0x6666; rex64; call __tls_get_addr@plt
52bc799a 4201 into:
142411ca 4202 movq %fs:0, %rax
52bc799a
L		 4203 addq foo@gottpoff(%rip), %rax
4204 For 32bit, change
4205 leaq foo@tlsgd(%rip), %rdi
4206 .word 0x6666; rex64; call __tls_get_addr@plt
4207 into:
4208 movl %fs:0, %eax
142411ca 4209 addq foo@gottpoff(%rip), %rax */
52bc799a
L		 4210 if (ABI_64_P (output_bfd))
4211 memcpy (contents + roff - 4,
4212 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4213 16);
4214 else
4215 memcpy (contents + roff - 3,
4216 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4217 15);
142411ca 4218
6de2ae4a
L		 4219 relocation = (htab->elf.sgot->output_section->vma
4220 + htab->elf.sgot->output_offset + off
142411ca
L		 4221 - roff
4222 - input_section->output_section->vma
4223 - input_section->output_offset
4224 - 12);
4225 bfd_put_32 (output_bfd, relocation,
4226 contents + roff + 8);
4227 /* Skip R_X86_64_PLT32. */
4228 rel++;
4229 continue;
4230 }
351f65ca 4231 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
142411ca
L		 4232 {
4233 /* GDesc -> IE transition.
4234 It's originally something like:
4235 leaq x@tlsdesc(%rip), %rax
67a4f2b7 4236
142411ca 4237 Change it to:
c9736ba0 4238 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
67a4f2b7 4239
142411ca
L		 4240 /* Now modify the instruction as appropriate. To
4241 turn a leaq into a movq in the form we use it, it
4242 suffices to change the second byte from 0x8d to
4243 0x8b. */
4244 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4245
4246 bfd_put_32 (output_bfd,
6de2ae4a
L		 4247 htab->elf.sgot->output_section->vma
4248 + htab->elf.sgot->output_offset + off
142411ca
L		 4249 - rel->r_offset
4250 - input_section->output_section->vma
4251 - input_section->output_offset
4252 - 4,
4253 contents + roff);
4254 continue;
4255 }
351f65ca 4256 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
142411ca
L		 4257 {
4258 /* GDesc -> IE transition.
4259 It's originally:
4260 call *(%rax)
4261
4262 Change it to:
c9736ba0 4263 xchg %ax, %ax. */
142411ca 4264
142411ca
L		 4265 bfd_put_8 (output_bfd, 0x66, contents + roff);
4266 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4267 continue;
4268 }
4269 else
4270 BFD_ASSERT (FALSE);
67a4f2b7 4271 }
bffbf940
JJ		 4272 break;
4273
4274 case R_X86_64_TLSLD:
351f65ca
L		 4275 if (! elf_x86_64_tls_transition (info, input_bfd,
4276 input_section, contents,
4277 symtab_hdr, sym_hashes,
4278 &r_type, GOT_UNKNOWN,
4279 rel, relend, h, r_symndx))
142411ca 4280 return FALSE;
a3fadc9a 4281
142411ca
L		 4282 if (r_type != R_X86_64_TLSLD)
4283 {
bffbf940 4284 /* LD->LE transition:
a3fadc9a 4285 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
52bc799a
L		 4286 For 64bit, we change it into:
4287 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4288 For 32bit, we change it into:
4289 nopl 0x0(%rax); movl %fs:0, %eax. */
142411ca
L		 4290
4291 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
52bc799a
L		 4292 if (ABI_64_P (output_bfd))
4293 memcpy (contents + rel->r_offset - 3,
4294 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4295 else
4296 memcpy (contents + rel->r_offset - 3,
4297 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
a3fadc9a 4298 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
bffbf940
JJ		 4299 rel++;
4300 continue;
4301 }
4302
6de2ae4a 4303 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4304 abort ();
4305
4306 off = htab->tls_ld_got.offset;
4307 if (off & 1)
4308 off &= ~1;
4309 else
4310 {
4311 Elf_Internal_Rela outrel;
bffbf940 4312
6de2ae4a 4313 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4314 abort ();
4315
6de2ae4a
L		 4316 outrel.r_offset = (htab->elf.sgot->output_section->vma
4317 + htab->elf.sgot->output_offset + off);
bffbf940
JJ		 4318
4319 bfd_put_64 (output_bfd, 0,
6de2ae4a 4320 htab->elf.sgot->contents + off);
bffbf940 4321 bfd_put_64 (output_bfd, 0,
6de2ae4a 4322 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4323 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
bffbf940 4324 outrel.r_addend = 0;
351f65ca 4325 elf_append_rela (output_bfd, htab->elf.srelgot,
464d3bd4 4326 &outrel);
bffbf940
JJ		 4327 htab->tls_ld_got.offset |= 1;
4328 }
6de2ae4a
L		 4329 relocation = htab->elf.sgot->output_section->vma
4330 + htab->elf.sgot->output_offset + off;
b34976b6 4331 unresolved_reloc = FALSE;
bffbf940
JJ		 4332 break;
4333
4334 case R_X86_64_DTPOFF32:
1d85728f 4335 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
351f65ca 4336 relocation -= elf_x86_64_dtpoff_base (info);
bffbf940 4337 else
351f65ca 4338 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4339 break;
4340
4341 case R_X86_64_TPOFF32:
6769d501 4342 case R_X86_64_TPOFF64:
9b769489 4343 BFD_ASSERT (info->executable);
351f65ca 4344 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4345 break;
4346
70256ad8
AJ		 4347 default:
4348 break;
4349 }
8d88c4ca 4350
239e1f3a
AM		 4351 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4352 because such sections are not SEC_ALLOC and thus ld.so will
4353 not process them. */
c434dee6 4354 if (unresolved_reloc
239e1f3a 4355 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4356 && h->def_dynamic)
4357 && _bfd_elf_section_offset (output_bfd, info, input_section,
4358 rel->r_offset) != (bfd_vma) -1)
a040981f
L		 4359 {
4360 (*_bfd_error_handler)
4361 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4362 input_bfd,
4363 input_section,
4364 (long) rel->r_offset,
4365 howto->name,
4366 h->root.root.string);
4367 return FALSE;
4368 }
c434dee6 4369
cbe950e9 4370do_relocation:
8d88c4ca 4371 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ		 4372 contents, rel->r_offset,
4373 relocation, rel->r_addend);
8d88c4ca 4374
62d78908 4375check_relocation_error:
8d88c4ca 4376 if (r != bfd_reloc_ok)
8da6118f 4377 {
c434dee6
AJ		 4378 const char *name;
4379
4380 if (h != NULL)
4381 name = h->root.root.string;
4382 else
8da6118f 4383 {
c434dee6
AJ		 4384 name = bfd_elf_string_from_elf_section (input_bfd,
4385 symtab_hdr->sh_link,
4386 sym->st_name);
4387 if (name == NULL)
b34976b6 4388 return FALSE;
c434dee6
AJ		 4389 if (*name == '\0')
4390 name = bfd_section_name (input_bfd, sec);
4391 }
4392
4393 if (r == bfd_reloc_overflow)
4394 {
c434dee6 4395 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 4396 (info, (h ? &h->root : NULL), name, howto->name,
4397 (bfd_vma) 0, input_bfd, input_section,
4398 rel->r_offset)))
b34976b6 4399 return FALSE;
c434dee6
AJ		 4400 }
4401 else
4402 {
4403 (*_bfd_error_handler)
bb95161d 4404 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
d003868e 4405 input_bfd, input_section,
c434dee6 4406 (long) rel->r_offset, name, (int) r);
b34976b6 4407 return FALSE;
8da6118f
KH		 4408 }
4409 }
8d88c4ca 4410 }
70256ad8 4411
b34976b6 4412 return TRUE;
70256ad8
AJ		 4413}
4414
4415/* Finish up dynamic symbol handling. We set the contents of various
4416 dynamic sections here. */
4417
b34976b6 4418static bfd_boolean
351f65ca
L		 4419elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4420 struct bfd_link_info *info,
4421 struct elf_link_hash_entry *h,
220cf809 4422 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
70256ad8 4423{
351f65ca 4424 struct elf_x86_64_link_hash_table *htab;
eed180f8
RM		 4425 const struct elf_x86_64_backend_data *const abed
4426 = get_elf_x86_64_backend_data (output_bfd);
70256ad8 4427
351f65ca 4428 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 4429 if (htab == NULL)
4430 return FALSE;
70256ad8
AJ		 4431
4432 if (h->plt.offset != (bfd_vma) -1)
4433 {
70256ad8
AJ		 4434 bfd_vma plt_index;
4435 bfd_vma got_offset;
4436 Elf_Internal_Rela rela;
947216bf 4437 bfd_byte *loc;
cbe950e9 4438 asection *plt, *gotplt, *relplt;
351f65ca 4439 const struct elf_backend_data *bed;
cbe950e9
L		 4440
4441 /* When building a static executable, use .iplt, .igot.plt and
4442 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 4443 if (htab->elf.splt != NULL)
cbe950e9 4444 {
6de2ae4a
L		 4445 plt = htab->elf.splt;
4446 gotplt = htab->elf.sgotplt;
4447 relplt = htab->elf.srelplt;
cbe950e9
L		 4448 }
4449 else
4450 {
6de2ae4a
L		 4451 plt = htab->elf.iplt;
4452 gotplt = htab->elf.igotplt;
4453 relplt = htab->elf.irelplt;
cbe950e9 4454 }
70256ad8
AJ		 4455
4456 /* This symbol has an entry in the procedure linkage table. Set
407443a3 4457 it up. */
cbe950e9
L		 4458 if ((h->dynindx == -1
4459 && !((h->forced_local || info->executable)
4460 && h->def_regular
4461 && h->type == STT_GNU_IFUNC))
4462 || plt == NULL
4463 || gotplt == NULL
4464 || relplt == NULL)
cec7f46a 4465 abort ();
70256ad8
AJ		 4466
4467 /* Get the index in the procedure linkage table which
4468 corresponds to this symbol. This is the index of this symbol
4469 in all the symbols for which we are making plt entries. The
cbe950e9 4470 first entry in the procedure linkage table is reserved.
6bbec505 4471
cbe950e9 4472 Get the offset into the .got table of the entry that
407443a3 4473 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
cbe950e9
L		 4474 bytes. The first three are reserved for the dynamic linker.
4475
4476 For static executables, we don't reserve anything. */
4477
6de2ae4a 4478 if (plt == htab->elf.splt)
cbe950e9 4479 {
eed180f8 4480 got_offset = h->plt.offset / abed->plt_entry_size - 1;
e1f98742 4481 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
cbe950e9
L		 4482 }
4483 else
4484 {
eed180f8 4485 got_offset = h->plt.offset / abed->plt_entry_size;
e1f98742 4486 got_offset = got_offset * GOT_ENTRY_SIZE;
cbe950e9 4487 }
70256ad8
AJ		 4488
4489 /* Fill in the entry in the procedure linkage table. */
eed180f8
RM		 4490 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
4491 abed->plt_entry_size);
4492
4493 /* Insert the relocation positions of the plt section. */
4494
4495 /* Put offset the PC-relative instruction referring to the GOT entry,
4496 subtracting the size of that instruction. */
653165cc 4497 bfd_put_32 (output_bfd,
eed180f8
RM		 4498 (gotplt->output_section->vma
4499 + gotplt->output_offset
4500 + got_offset
4501 - plt->output_section->vma
4502 - plt->output_offset
4503 - h->plt.offset
4504 - abed->plt_got_insn_size),
4505 plt->contents + h->plt.offset + abed->plt_got_offset);
cbe950e9 4506
653165cc 4507 /* Fill in the entry in the global offset table, initially this
eed180f8 4508 points to the second part of the PLT entry. */
cbe950e9
L		 4509 bfd_put_64 (output_bfd, (plt->output_section->vma
4510 + plt->output_offset
eed180f8 4511 + h->plt.offset + abed->plt_lazy_offset),
cbe950e9 4512 gotplt->contents + got_offset);
70256ad8
AJ		 4513
4514 /* Fill in the entry in the .rela.plt section. */
cbe950e9
L		 4515 rela.r_offset = (gotplt->output_section->vma
4516 + gotplt->output_offset
70256ad8 4517 + got_offset);
cbe950e9
L		 4518 if (h->dynindx == -1
4519 || ((info->executable
4520 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4521 && h->def_regular
4522 && h->type == STT_GNU_IFUNC))
4523 {
4524 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4525 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
351f65ca 4526 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
cbe950e9
L		 4527 rela.r_addend = (h->root.u.def.value
4528 + h->root.u.def.section->output_section->vma
4529 + h->root.u.def.section->output_offset);
e1f98742
L		 4530 /* R_X86_64_IRELATIVE comes last. */
4531 plt_index = htab->next_irelative_index--;
cbe950e9
L		 4532 }
4533 else
4534 {
351f65ca 4535 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
cbe950e9 4536 rela.r_addend = 0;
e1f98742
L		 4537 plt_index = htab->next_jump_slot_index++;
4538 }
4539
4540 /* Don't fill PLT entry for static executables. */
4541 if (plt == htab->elf.splt)
4542 {
4543 /* Put relocation index. */
4544 bfd_put_32 (output_bfd, plt_index,
eed180f8 4545 plt->contents + h->plt.offset + abed->plt_reloc_offset);
e1f98742 4546 /* Put offset for jmp .PLT0. */
eed180f8
RM		 4547 bfd_put_32 (output_bfd, - (h->plt.offset + abed->plt_plt_insn_end),
4548 plt->contents + h->plt.offset + abed->plt_plt_offset);
cbe950e9 4549 }
351f65ca
L		 4550
4551 bed = get_elf_backend_data (output_bfd);
4552 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
82e96e07 4553 bed->s->swap_reloca_out (output_bfd, &rela, loc);
70256ad8 4554
f5385ebf 4555 if (!h->def_regular)
70256ad8
AJ		 4556 {
4557 /* Mark the symbol as undefined, rather than as defined in
47a9f7b3
JJ		 4558 the .plt section. Leave the value if there were any
4559 relocations where pointer equality matters (this is a clue
c434dee6
AJ		 4560 for the dynamic linker, to make function pointer
4561 comparisons work between an application and shared
47a9f7b3
JJ		 4562 library), otherwise set it to zero. If a function is only
4563 called from a binary, there is no need to slow down
4564 shared libraries because of that. */
70256ad8 4565 sym->st_shndx = SHN_UNDEF;
f5385ebf 4566 if (!h->pointer_equality_needed)
47a9f7b3 4567 sym->st_value = 0;
70256ad8
AJ		 4568 }
4569 }
4570
bffbf940 4571 if (h->got.offset != (bfd_vma) -1
351f65ca
L		 4572 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
4573 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 4574 {
053579d7
AJ		 4575 Elf_Internal_Rela rela;
4576
4577 /* This symbol has an entry in the global offset table. Set it
bffbf940 4578 up. */
6de2ae4a 4579 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
c434dee6 4580 abort ();
053579d7 4581
6de2ae4a
L		 4582 rela.r_offset = (htab->elf.sgot->output_section->vma
4583 + htab->elf.sgot->output_offset
dc810e39 4584 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ		 4585
4586 /* If this is a static link, or it is a -Bsymbolic link and the
4587 symbol is defined locally or was forced to be local because
4588 of a version file, we just want to emit a RELATIVE reloc.
4589 The entry in the global offset table will already have been
4590 initialized in the relocate_section function. */
710ab287 4591 if (h->def_regular
0018b0a3
L		 4592 && h->type == STT_GNU_IFUNC)
4593 {
710ab287
L		 4594 if (info->shared)
4595 {
4596 /* Generate R_X86_64_GLOB_DAT. */
4597 goto do_glob_dat;
4598 }
4599 else
4600 {
90d60710
L		 4601 asection *plt;
4602
710ab287
L		 4603 if (!h->pointer_equality_needed)
4604 abort ();
4605
4606 /* For non-shared object, we can't use .got.plt, which
4607 contains the real function addres if we need pointer
4608 equality. We load the GOT entry with the PLT entry. */
90d60710 4609 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L		 4610 bfd_put_64 (output_bfd, (plt->output_section->vma
4611 + plt->output_offset
4612 + h->plt.offset),
6de2ae4a 4613 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 4614 return TRUE;
4615 }
0018b0a3
L		 4616 }
4617 else if (info->shared
4618 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 4619 {
41bed6dd
L		 4620 if (!h->def_regular)
4621 return FALSE;
cc78d0af 4622 BFD_ASSERT((h->got.offset & 1) != 0);
351f65ca 4623 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
053579d7
AJ		 4624 rela.r_addend = (h->root.u.def.value
4625 + h->root.u.def.section->output_section->vma
4626 + h->root.u.def.section->output_offset);
4627 }
4628 else
4629 {
4630 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 4631do_glob_dat:
c434dee6 4632 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 4633 htab->elf.sgot->contents + h->got.offset);
351f65ca 4634 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
053579d7
AJ		 4635 rela.r_addend = 0;
4636 }
4637
351f65ca 4638 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
053579d7
AJ		 4639 }
4640
f5385ebf 4641 if (h->needs_copy)
70256ad8 4642 {
70256ad8
AJ		 4643 Elf_Internal_Rela rela;
4644
4645 /* This symbol needs a copy reloc. Set it up. */
4646
c434dee6
AJ		 4647 if (h->dynindx == -1
4648 || (h->root.type != bfd_link_hash_defined
4649 && h->root.type != bfd_link_hash_defweak)
4650 || htab->srelbss == NULL)
4651 abort ();
70256ad8
AJ		 4652
4653 rela.r_offset = (h->root.u.def.value
4654 + h->root.u.def.section->output_section->vma
4655 + h->root.u.def.section->output_offset);
351f65ca 4656 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
70256ad8 4657 rela.r_addend = 0;
351f65ca 4658 elf_append_rela (output_bfd, htab->srelbss, &rela);
70256ad8
AJ		 4659 }
4660
b34976b6 4661 return TRUE;
70256ad8
AJ		 4662}
4663
c25bc9fc
L		 4664/* Finish up local dynamic symbol handling. We set the contents of
4665 various dynamic sections here. */
4666
4667static bfd_boolean
351f65ca 4668elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
c25bc9fc
L		 4669{
4670 struct elf_link_hash_entry *h
4671 = (struct elf_link_hash_entry *) *slot;
4672 struct bfd_link_info *info
eed180f8 4673 = (struct bfd_link_info *) inf;
c25bc9fc 4674
351f65ca 4675 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
c25bc9fc
L		 4676 info, h, NULL);
4677}
4678
c434dee6
AJ		 4679/* Used to decide how to sort relocs in an optimal manner for the
4680 dynamic linker, before writing them out. */
4681
4682static enum elf_reloc_type_class
351f65ca 4683elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
c434dee6 4684{
351f65ca 4685 switch ((int) ELF32_R_TYPE (rela->r_info))
c434dee6
AJ		 4686 {
4687 case R_X86_64_RELATIVE:
1da80baa 4688 case R_X86_64_RELATIVE64:
c434dee6
AJ		 4689 return reloc_class_relative;
4690 case R_X86_64_JUMP_SLOT:
4691 return reloc_class_plt;
4692 case R_X86_64_COPY:
4693 return reloc_class_copy;
4694 default:
4695 return reloc_class_normal;
4696 }
4697}
4698
70256ad8
AJ		 4699/* Finish up the dynamic sections. */
4700
b34976b6 4701static bfd_boolean
351f65ca
L		 4702elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
4703 struct bfd_link_info *info)
70256ad8 4704{
351f65ca 4705 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 4706 bfd *dynobj;
4707 asection *sdyn;
eed180f8
RM		 4708 const struct elf_x86_64_backend_data *const abed
4709 = get_elf_x86_64_backend_data (output_bfd);
70256ad8 4710
351f65ca 4711 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 4712 if (htab == NULL)
4713 return FALSE;
4714
c434dee6 4715 dynobj = htab->elf.dynobj;
3d4d4302 4716 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
70256ad8 4717
c434dee6 4718 if (htab->elf.dynamic_sections_created)
70256ad8 4719 {
82e96e07
L		 4720 bfd_byte *dyncon, *dynconend;
4721 const struct elf_backend_data *bed;
4722 bfd_size_type sizeof_dyn;
70256ad8 4723
6de2ae4a 4724 if (sdyn == NULL || htab->elf.sgot == NULL)
c434dee6 4725 abort ();
70256ad8 4726
82e96e07
L		 4727 bed = get_elf_backend_data (dynobj);
4728 sizeof_dyn = bed->s->sizeof_dyn;
4729 dyncon = sdyn->contents;
4730 dynconend = sdyn->contents + sdyn->size;
4731 for (; dyncon < dynconend; dyncon += sizeof_dyn)
70256ad8
AJ		 4732 {
4733 Elf_Internal_Dyn dyn;
70256ad8
AJ		 4734 asection *s;
4735
82e96e07 4736 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
70256ad8
AJ		 4737
4738 switch (dyn.d_tag)
4739 {
4740 default:
053579d7 4741 continue;
70256ad8
AJ		 4742
4743 case DT_PLTGOT:
6de2ae4a 4744 s = htab->elf.sgotplt;
8c37241b 4745 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
c434dee6 4746 break;
70256ad8
AJ		 4747
4748 case DT_JMPREL:
6de2ae4a 4749 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
c434dee6 4750 break;
70256ad8 4751
c434dee6 4752 case DT_PLTRELSZ:
6de2ae4a 4753 s = htab->elf.srelplt->output_section;
eea6121a 4754 dyn.d_un.d_val = s->size;
70256ad8
AJ		 4755 break;
4756
4757 case DT_RELASZ:
c434dee6
AJ		 4758 /* The procedure linkage table relocs (DT_JMPREL) should
4759 not be included in the overall relocs (DT_RELA).
4760 Therefore, we override the DT_RELASZ entry here to
4761 make it not include the JMPREL relocs. Since the
4762 linker script arranges for .rela.plt to follow all
4763 other relocation sections, we don't have to worry
4764 about changing the DT_RELA entry. */
6de2ae4a 4765 if (htab->elf.srelplt != NULL)
70256ad8 4766 {
6de2ae4a 4767 s = htab->elf.srelplt->output_section;
eea6121a 4768 dyn.d_un.d_val -= s->size;
70256ad8
AJ		 4769 }
4770 break;
67a4f2b7
AO		 4771
4772 case DT_TLSDESC_PLT:
6de2ae4a 4773 s = htab->elf.splt;
67a4f2b7
AO		 4774 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4775 + htab->tlsdesc_plt;
4776 break;
4777
4778 case DT_TLSDESC_GOT:
6de2ae4a 4779 s = htab->elf.sgot;
67a4f2b7
AO		 4780 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4781 + htab->tlsdesc_got;
4782 break;
70256ad8 4783 }
c434dee6 4784
82e96e07 4785 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
70256ad8
AJ		 4786 }
4787
c434dee6 4788 /* Fill in the special first entry in the procedure linkage table. */
6de2ae4a 4789 if (htab->elf.splt && htab->elf.splt->size > 0)
70256ad8 4790 {
653165cc 4791 /* Fill in the first entry in the procedure linkage table. */
eed180f8
RM		 4792 memcpy (htab->elf.splt->contents,
4793 abed->plt0_entry, abed->plt_entry_size);
653165cc
AJ		 4794 /* Add offset for pushq GOT+8(%rip), since the instruction
4795 uses 6 bytes subtract this value. */
4796 bfd_put_32 (output_bfd,
6de2ae4a
L		 4797 (htab->elf.sgotplt->output_section->vma
4798 + htab->elf.sgotplt->output_offset
653165cc 4799 + 8
6de2ae4a
L		 4800 - htab->elf.splt->output_section->vma
4801 - htab->elf.splt->output_offset
653165cc 4802 - 6),
eed180f8
RM		 4803 htab->elf.splt->contents + abed->plt0_got1_offset);
4804 /* Add offset for the PC-relative instruction accessing GOT+16,
4805 subtracting the offset to the end of that instruction. */
653165cc 4806 bfd_put_32 (output_bfd,
6de2ae4a
L		 4807 (htab->elf.sgotplt->output_section->vma
4808 + htab->elf.sgotplt->output_offset
653165cc 4809 + 16
6de2ae4a
L		 4810 - htab->elf.splt->output_section->vma
4811 - htab->elf.splt->output_offset
eed180f8
RM		 4812 - abed->plt0_got2_insn_end),
4813 htab->elf.splt->contents + abed->plt0_got2_offset);
653165cc 4814
eed180f8
RM		 4815 elf_section_data (htab->elf.splt->output_section)
4816 ->this_hdr.sh_entsize = abed->plt_entry_size;
67a4f2b7
AO		 4817
4818 if (htab->tlsdesc_plt)
4819 {
4820 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 4821 htab->elf.sgot->contents + htab->tlsdesc_got);
67a4f2b7 4822
6de2ae4a 4823 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
eed180f8 4824 abed->plt0_entry, abed->plt_entry_size);
67a4f2b7
AO		 4825
4826 /* Add offset for pushq GOT+8(%rip), since the
4827 instruction uses 6 bytes subtract this value. */
4828 bfd_put_32 (output_bfd,
6de2ae4a
L		 4829 (htab->elf.sgotplt->output_section->vma
4830 + htab->elf.sgotplt->output_offset
67a4f2b7 4831 + 8
6de2ae4a
L		 4832 - htab->elf.splt->output_section->vma
4833 - htab->elf.splt->output_offset
67a4f2b7
AO		 4834 - htab->tlsdesc_plt
4835 - 6),
eed180f8
RM		 4836 htab->elf.splt->contents
4837 + htab->tlsdesc_plt + abed->plt0_got1_offset);
4838 /* Add offset for the PC-relative instruction accessing GOT+TDG,
4839 where TGD stands for htab->tlsdesc_got, subtracting the offset
4840 to the end of that instruction. */
67a4f2b7 4841 bfd_put_32 (output_bfd,
6de2ae4a
L		 4842 (htab->elf.sgot->output_section->vma
4843 + htab->elf.sgot->output_offset
67a4f2b7 4844 + htab->tlsdesc_got
6de2ae4a
L		 4845 - htab->elf.splt->output_section->vma
4846 - htab->elf.splt->output_offset
67a4f2b7 4847 - htab->tlsdesc_plt
eed180f8
RM		 4848 - abed->plt0_got2_insn_end),
4849 htab->elf.splt->contents
4850 + htab->tlsdesc_plt + abed->plt0_got2_offset);
67a4f2b7 4851 }
70256ad8 4852 }
70256ad8
AJ		 4853 }
4854
6de2ae4a 4855 if (htab->elf.sgotplt)
70256ad8 4856 {
56d4289c
L		 4857 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4858 {
4859 (*_bfd_error_handler)
4860 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4861 return FALSE;
4862 }
4863
c434dee6 4864 /* Fill in the first three entries in the global offset table. */
6de2ae4a 4865 if (htab->elf.sgotplt->size > 0)
c434dee6
AJ		 4866 {
4867 /* Set the first entry in the global offset table to the address of
4868 the dynamic section. */
4869 if (sdyn == NULL)
6de2ae4a 4870 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
c434dee6
AJ		 4871 else
4872 bfd_put_64 (output_bfd,
4873 sdyn->output_section->vma + sdyn->output_offset,
6de2ae4a 4874 htab->elf.sgotplt->contents);
c434dee6 4875 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6de2ae4a
L		 4876 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
4877 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
c434dee6 4878 }
70256ad8 4879
6de2ae4a 4880 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
c434dee6
AJ		 4881 GOT_ENTRY_SIZE;
4882 }
70256ad8 4883
e41b3a13 4884 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 4885 if (htab->plt_eh_frame != NULL
4886 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 4887 {
4888 if (htab->elf.splt != NULL
4889 && htab->elf.splt->size != 0
4890 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4891 && htab->elf.splt->output_section != NULL
4892 && htab->plt_eh_frame->output_section != NULL)
4893 {
4894 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4895 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4896 + htab->plt_eh_frame->output_offset
4897 + PLT_FDE_START_OFFSET;
4898 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4899 htab->plt_eh_frame->contents
4900 + PLT_FDE_START_OFFSET);
4901 }
dbaa2011 4902 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 4903 {
4904 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4905 htab->plt_eh_frame,
4906 htab->plt_eh_frame->contents))
4907 return FALSE;
4908 }
4909 }
4910
6de2ae4a
L		 4911 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4912 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
8c37241b
JJ		 4913 = GOT_ENTRY_SIZE;
4914
c25bc9fc
L		 4915 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4916 htab_traverse (htab->loc_hash_table,
351f65ca 4917 elf_x86_64_finish_local_dynamic_symbol,
c25bc9fc
L		 4918 info);
4919
b34976b6 4920 return TRUE;
8d88c4ca
NC		 4921}
4922
4c45e5c9
JJ		 4923/* Return address for Ith PLT stub in section PLT, for relocation REL
4924 or (bfd_vma) -1 if it should not be included. */
4925
4926static bfd_vma
351f65ca
L		 4927elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
4928 const arelent *rel ATTRIBUTE_UNUSED)
4c45e5c9 4929{
eed180f8 4930 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
4c45e5c9 4931}
8df9fc9d 4932
d2b2c203
DJ		 4933/* Handle an x86-64 specific section when reading an object file. This
4934 is called when elfcode.h finds a section with an unknown type. */
4935
4936static bfd_boolean
351f65ca 4937elf_x86_64_section_from_shdr (bfd *abfd,
6dc132d9
L		 4938 Elf_Internal_Shdr *hdr,
4939 const char *name,
4940 int shindex)
d2b2c203
DJ		 4941{
4942 if (hdr->sh_type != SHT_X86_64_UNWIND)
4943 return FALSE;
4944
6dc132d9 4945 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
d2b2c203
DJ		 4946 return FALSE;
4947
4948 return TRUE;
4949}
4950
3b22753a
L		 4951/* Hook called by the linker routine which adds symbols from an object
4952 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4953 of .bss. */
4954
4955static bfd_boolean
351f65ca
L		 4956elf_x86_64_add_symbol_hook (bfd *abfd,
4957 struct bfd_link_info *info,
4958 Elf_Internal_Sym *sym,
4959 const char **namep ATTRIBUTE_UNUSED,
4960 flagword *flagsp ATTRIBUTE_UNUSED,
4961 asection **secp,
4962 bfd_vma *valp)
3b22753a
L		 4963{
4964 asection *lcomm;
4965
4966 switch (sym->st_shndx)
4967 {
4968 case SHN_X86_64_LCOMMON:
4969 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
4970 if (lcomm == NULL)
4971 {
4972 lcomm = bfd_make_section_with_flags (abfd,
4973 "LARGE_COMMON",
4974 (SEC_ALLOC
4975 | SEC_IS_COMMON
4976 | SEC_LINKER_CREATED));
4977 if (lcomm == NULL)
4978 return FALSE;
4979 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
4980 }
4981 *secp = lcomm;
4982 *valp = sym->st_size;
c35bdf6e 4983 return TRUE;
3b22753a 4984 }
d8045f23 4985
c16153ae 4986 if ((abfd->flags & DYNAMIC) == 0
f64b2e8d
NC		 4987 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
4988 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
4989 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
d8045f23 4990
3b22753a
L		 4991 return TRUE;
4992}
4993
4994
4995/* Given a BFD section, try to locate the corresponding ELF section
4996 index. */
4997
4998static bfd_boolean
351f65ca
L		 4999elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
5000 asection *sec, int *index_return)
3b22753a
L		 5001{
5002 if (sec == &_bfd_elf_large_com_section)
5003 {
91d6fa6a 5004 *index_return = SHN_X86_64_LCOMMON;
3b22753a
L		 5005 return TRUE;
5006 }
5007 return FALSE;
5008}
5009
5010/* Process a symbol. */
5011
5012static void
351f65ca
L		 5013elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5014 asymbol *asym)
3b22753a
L		 5015{
5016 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5017
5018 switch (elfsym->internal_elf_sym.st_shndx)
5019 {
5020 case SHN_X86_64_LCOMMON:
5021 asym->section = &_bfd_elf_large_com_section;
5022 asym->value = elfsym->internal_elf_sym.st_size;
5023 /* Common symbol doesn't set BSF_GLOBAL. */
5024 asym->flags &= ~BSF_GLOBAL;
5025 break;
5026 }
5027}
5028
5029static bfd_boolean
351f65ca 5030elf_x86_64_common_definition (Elf_Internal_Sym *sym)
3b22753a
L		 5031{
5032 return (sym->st_shndx == SHN_COMMON
5033 || sym->st_shndx == SHN_X86_64_LCOMMON);
5034}
5035
5036static unsigned int
351f65ca 5037elf_x86_64_common_section_index (asection *sec)
3b22753a
L		 5038{
5039 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5040 return SHN_COMMON;
5041 else
5042 return SHN_X86_64_LCOMMON;
5043}
5044
5045static asection *
351f65ca 5046elf_x86_64_common_section (asection *sec)
3b22753a
L		 5047{
5048 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5049 return bfd_com_section_ptr;
5050 else
5051 return &_bfd_elf_large_com_section;
5052}
5053
5054static bfd_boolean
351f65ca
L		 5055elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
5056 struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED,
5057 struct elf_link_hash_entry *h,
5058 Elf_Internal_Sym *sym,
5059 asection **psec,
5060 bfd_vma *pvalue ATTRIBUTE_UNUSED,
5061 unsigned int *pold_alignment ATTRIBUTE_UNUSED,
5062 bfd_boolean *skip ATTRIBUTE_UNUSED,
5063 bfd_boolean *override ATTRIBUTE_UNUSED,
5064 bfd_boolean *type_change_ok ATTRIBUTE_UNUSED,
5065 bfd_boolean *size_change_ok ATTRIBUTE_UNUSED,
71e7aa7d
L		 5066 bfd_boolean *newdyn ATTRIBUTE_UNUSED,
5067 bfd_boolean *newdef,
351f65ca
L		 5068 bfd_boolean *newdyncommon ATTRIBUTE_UNUSED,
5069 bfd_boolean *newweak ATTRIBUTE_UNUSED,
5070 bfd *abfd ATTRIBUTE_UNUSED,
5071 asection **sec,
71e7aa7d
L		 5072 bfd_boolean *olddyn ATTRIBUTE_UNUSED,
5073 bfd_boolean *olddef,
351f65ca
L		 5074 bfd_boolean *olddyncommon ATTRIBUTE_UNUSED,
5075 bfd_boolean *oldweak ATTRIBUTE_UNUSED,
5076 bfd *oldbfd,
5077 asection **oldsec)
3b22753a
L		 5078{
5079 /* A normal common symbol and a large common symbol result in a
00492999
L		 5080 normal common symbol. We turn the large common symbol into a
5081 normal one. */
71e7aa7d 5082 if (!*olddef
3b22753a 5083 && h->root.type == bfd_link_hash_common
71e7aa7d 5084 && !*newdef
3b22753a 5085 && bfd_is_com_section (*sec)
00492999 5086 && *oldsec != *sec)
3b22753a 5087 {
00492999
L		 5088 if (sym->st_shndx == SHN_COMMON
5089 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0)
5090 {
5091 h->root.u.c.p->section
5092 = bfd_make_section_old_way (oldbfd, "COMMON");
5093 h->root.u.c.p->section->flags = SEC_ALLOC;
5094 }
5095 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5096 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0)
9a2e389a 5097 *psec = *sec = bfd_com_section_ptr;
3b22753a
L		 5098 }
5099
5100 return TRUE;
5101}
5102
5103static int
351f65ca
L		 5104elf_x86_64_additional_program_headers (bfd *abfd,
5105 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3b22753a
L		 5106{
5107 asection *s;
9a2e389a 5108 int count = 0;
3b22753a
L		 5109
5110 /* Check to see if we need a large readonly segment. */
5111 s = bfd_get_section_by_name (abfd, ".lrodata");
5112 if (s && (s->flags & SEC_LOAD))
5113 count++;
5114
5115 /* Check to see if we need a large data segment. Since .lbss sections
5116 is placed right after the .bss section, there should be no need for
5117 a large data segment just because of .lbss. */
5118 s = bfd_get_section_by_name (abfd, ".ldata");
5119 if (s && (s->flags & SEC_LOAD))
5120 count++;
5121
5122 return count;
5123}
5124
fdc90cb4
JJ		 5125/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5126
5127static bfd_boolean
351f65ca 5128elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
fdc90cb4
JJ		 5129{
5130 if (h->plt.offset != (bfd_vma) -1
5131 && !h->def_regular
5132 && !h->pointer_equality_needed)
5133 return FALSE;
5134
5135 return _bfd_elf_hash_symbol (h);
5136}
5137
c543bf9a
L		 5138/* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5139
5140static bfd_boolean
5141elf_x86_64_relocs_compatible (const bfd_target *input,
5142 const bfd_target *output)
5143{
5144 return ((xvec_get_elf_backend_data (input)->s->elfclass
5145 == xvec_get_elf_backend_data (output)->s->elfclass)
5146 && _bfd_elf_relocs_compatible (input, output));
5147}
5148
9a2e389a 5149static const struct bfd_elf_special_section
351f65ca 5150 elf_x86_64_special_sections[]=
3b22753a 5151{
0112cd26
NC		 5152 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5153 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5154 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
5155 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5156 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5157 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5158 { NULL, 0, 0, 0, 0 }
3b22753a
L		 5159};
5160
70256ad8
AJ		 5161#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
5162#define TARGET_LITTLE_NAME "elf64-x86-64"
5163#define ELF_ARCH bfd_arch_i386
ae95ffa6 5164#define ELF_TARGET_ID X86_64_ELF_DATA
70256ad8 5165#define ELF_MACHINE_CODE EM_X86_64
f7661549 5166#define ELF_MAXPAGESIZE 0x200000
2043964e 5167#define ELF_MINPAGESIZE 0x1000
24718e3b 5168#define ELF_COMMONPAGESIZE 0x1000
70256ad8
AJ		 5169
5170#define elf_backend_can_gc_sections 1
51b64d56 5171#define elf_backend_can_refcount 1
70256ad8
AJ		 5172#define elf_backend_want_got_plt 1
5173#define elf_backend_plt_readonly 1
5174#define elf_backend_want_plt_sym 0
5175#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 5176#define elf_backend_rela_normal 1
e41b3a13 5177#define elf_backend_plt_alignment 4
70256ad8 5178
351f65ca 5179#define elf_info_to_howto elf_x86_64_info_to_howto
70256ad8 5180
70256ad8 5181#define bfd_elf64_bfd_link_hash_table_create \
351f65ca 5182 elf_x86_64_link_hash_table_create
c25bc9fc 5183#define bfd_elf64_bfd_link_hash_table_free \
351f65ca
L		 5184 elf_x86_64_link_hash_table_free
5185#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
157090f7 5186#define bfd_elf64_bfd_reloc_name_lookup \
351f65ca 5187 elf_x86_64_reloc_name_lookup
70256ad8 5188
351f65ca 5189#define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
c543bf9a 5190#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
351f65ca
L		 5191#define elf_backend_check_relocs elf_x86_64_check_relocs
5192#define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5193#define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5194#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5195#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5196#define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5197#define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5198#define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5199#define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
8fd79e71
L		 5200#ifdef CORE_HEADER
5201#define elf_backend_write_core_note elf_x86_64_write_core_note
5202#endif
351f65ca
L		 5203#define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5204#define elf_backend_relocate_section elf_x86_64_relocate_section
5205#define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5206#define elf_backend_always_size_sections elf_x86_64_always_size_sections
74541ad4 5207#define elf_backend_init_index_section _bfd_elf_init_1_index_section
351f65ca 5208#define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
407443a3 5209#define elf_backend_object_p elf64_x86_64_elf_object_p
351f65ca 5210#define bfd_elf64_mkobject elf_x86_64_mkobject
8d88c4ca 5211
d2b2c203 5212#define elf_backend_section_from_shdr \
351f65ca 5213 elf_x86_64_section_from_shdr
d2b2c203 5214
3b22753a 5215#define elf_backend_section_from_bfd_section \
351f65ca 5216 elf_x86_64_elf_section_from_bfd_section
3b22753a 5217#define elf_backend_add_symbol_hook \
351f65ca 5218 elf_x86_64_add_symbol_hook
3b22753a 5219#define elf_backend_symbol_processing \
351f65ca 5220 elf_x86_64_symbol_processing
3b22753a 5221#define elf_backend_common_section_index \
351f65ca 5222 elf_x86_64_common_section_index
3b22753a 5223#define elf_backend_common_section \
351f65ca 5224 elf_x86_64_common_section
3b22753a 5225#define elf_backend_common_definition \
351f65ca 5226 elf_x86_64_common_definition
3b22753a 5227#define elf_backend_merge_symbol \
351f65ca 5228 elf_x86_64_merge_symbol
3b22753a 5229#define elf_backend_special_sections \
351f65ca 5230 elf_x86_64_special_sections
3b22753a 5231#define elf_backend_additional_program_headers \
351f65ca 5232 elf_x86_64_additional_program_headers
fdc90cb4 5233#define elf_backend_hash_symbol \
351f65ca 5234 elf_x86_64_hash_symbol
3b22753a 5235
d8045f23
NC		 5236#define elf_backend_post_process_headers _bfd_elf_set_osabi
5237
8d88c4ca 5238#include "elf64-target.h"
9d7cbccd
NC		 5239
5240/* FreeBSD support. */
5241
5242#undef TARGET_LITTLE_SYM
5243#define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
5244#undef TARGET_LITTLE_NAME
5245#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5246
d1036acb
L		 5247#undef ELF_OSABI
5248#define ELF_OSABI ELFOSABI_FREEBSD
9d7cbccd 5249
9d7cbccd
NC		 5250#undef elf64_bed
5251#define elf64_bed elf64_x86_64_fbsd_bed
5252
5253#include "elf64-target.h"
8a9036a4 5254
a6cc6b3b
RO		 5255/* Solaris 2 support. */
5256
5257#undef TARGET_LITTLE_SYM
5258#define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
5259#undef TARGET_LITTLE_NAME
5260#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5261
5262/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5263 objects won't be recognized. */
5264#undef ELF_OSABI
5265
5266#undef elf64_bed
5267#define elf64_bed elf64_x86_64_sol2_bed
5268
7dc98aea
RO		 5269/* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5270 boundary. */
5271#undef elf_backend_static_tls_alignment
5272#define elf_backend_static_tls_alignment 16
5273
a6cc6b3b
RO		 5274/* The Solaris 2 ABI requires a plt symbol on all platforms.
5275
5276 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5277 File, p.63. */
5278#undef elf_backend_want_plt_sym
5279#define elf_backend_want_plt_sym 1
5280
5281#include "elf64-target.h"
5282
8059fb19
RM		 5283/* Native Client support. */
5284
5285#undef TARGET_LITTLE_SYM
5286#define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
5287#undef TARGET_LITTLE_NAME
5288#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5289#undef elf64_bed
5290#define elf64_bed elf64_x86_64_nacl_bed
5291
5292#undef ELF_MAXPAGESIZE
5293#undef ELF_MINPAGESIZE
5294#undef ELF_COMMONPAGESIZE
5295#define ELF_MAXPAGESIZE 0x10000
5296#define ELF_MINPAGESIZE 0x10000
5297#define ELF_COMMONPAGESIZE 0x10000
5298
5299/* Restore defaults. */
5300#undef ELF_OSABI
5301#undef elf_backend_static_tls_alignment
5302#undef elf_backend_want_plt_sym
5303#define elf_backend_want_plt_sym 0
5304
5305/* NaCl uses substantially different PLT entries for the same effects. */
5306
5307#undef elf_backend_plt_alignment
5308#define elf_backend_plt_alignment 5
5309#define NACL_PLT_ENTRY_SIZE 64
5310#define NACLMASK 0xe0 /* 32-byte alignment mask. */
5311
5312static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
5313 {
5314 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5315 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5316 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5317 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5318 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5319
ea2d813e
RM		 5320 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5321 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */
5322
5323 /* 32 bytes of nop to pad out to the standard size. */
8059fb19
RM		 5324 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5325 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5326 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5327 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
ea2d813e
RM		 5328 0x66, /* excess data32 prefix */
5329 0x90 /* nop */
8059fb19
RM		 5330 };
5331
5332static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5333 {
5334 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5335 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5336 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5337 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5338
5339 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5340 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5341 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5342
5343 /* Lazy GOT entries point here (32-byte aligned). */
5344 0x68, /* pushq immediate */
5345 0, 0, 0, 0, /* replaced with index into relocation table. */
5346 0xe9, /* jmp relative */
5347 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5348
5349 /* 22 bytes of nop to pad out to the standard size. */
5350 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5351 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5352 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5353 };
5354
5355/* .eh_frame covering the .plt section. */
5356
5357static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
5358 {
5359#if (PLT_CIE_LENGTH != 20 \
5360 || PLT_FDE_LENGTH != 36 \
5361 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5362 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5363# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5364#endif
5365 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5366 0, 0, 0, 0, /* CIE ID */
5367 1, /* CIE version */
5368 'z', 'R', 0, /* Augmentation string */
5369 1, /* Code alignment factor */
5370 0x78, /* Data alignment factor */
5371 16, /* Return address column */
5372 1, /* Augmentation size */
5373 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5374 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5375 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5376 DW_CFA_nop, DW_CFA_nop,
5377
5378 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5379 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
5380 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5381 0, 0, 0, 0, /* .plt size goes here */
5382 0, /* Augmentation size */
5383 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
5384 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5385 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
5386 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5387 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5388 13, /* Block length */
5389 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
5390 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
5391 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5392 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
5393 DW_CFA_nop, DW_CFA_nop
5394 };
5395
5396static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
5397 {
5398 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
5399 elf_x86_64_nacl_plt_entry, /* plt_entry */
5400 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5401 2, /* plt0_got1_offset */
5402 9, /* plt0_got2_offset */
5403 13, /* plt0_got2_insn_end */
5404 3, /* plt_got_offset */
5405 33, /* plt_reloc_offset */
5406 38, /* plt_plt_offset */
5407 7, /* plt_got_insn_size */
5408 42, /* plt_plt_insn_end */
5409 32, /* plt_lazy_offset */
5410 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
5411 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
5412 };
5413
5414#undef elf_backend_arch_data
5415#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5416
5a68afcf
RM		 5417#undef elf_backend_modify_segment_map
5418#define elf_backend_modify_segment_map nacl_modify_segment_map
5419#undef elf_backend_modify_program_headers
5420#define elf_backend_modify_program_headers nacl_modify_program_headers
5421
8059fb19
RM		 5422#include "elf64-target.h"
5423
5424/* Native Client x32 support. */
5425
5426#undef TARGET_LITTLE_SYM
5427#define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
5428#undef TARGET_LITTLE_NAME
5429#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5430#undef elf32_bed
5431#define elf32_bed elf32_x86_64_nacl_bed
5432
5433#define bfd_elf32_bfd_link_hash_table_create \
5434 elf_x86_64_link_hash_table_create
5435#define bfd_elf32_bfd_link_hash_table_free \
5436 elf_x86_64_link_hash_table_free
5437#define bfd_elf32_bfd_reloc_type_lookup \
5438 elf_x86_64_reloc_type_lookup
5439#define bfd_elf32_bfd_reloc_name_lookup \
5440 elf_x86_64_reloc_name_lookup
5441#define bfd_elf32_mkobject \
5442 elf_x86_64_mkobject
5443
5444#undef elf_backend_object_p
5445#define elf_backend_object_p \
5446 elf32_x86_64_elf_object_p
5447
5448#undef elf_backend_bfd_from_remote_memory
5449#define elf_backend_bfd_from_remote_memory \
5450 _bfd_elf32_bfd_from_remote_memory
5451
5452#undef elf_backend_size_info
5453#define elf_backend_size_info \
5454 _bfd_elf32_size_info
5455
5456#include "elf32-target.h"
5457
5458/* Restore defaults. */
5a68afcf 5459#undef elf_backend_object_p
8059fb19 5460#define elf_backend_object_p elf64_x86_64_elf_object_p
5a68afcf
RM		 5461#undef elf_backend_bfd_from_remote_memory
5462#undef elf_backend_size_info
5463#undef elf_backend_modify_segment_map
5464#undef elf_backend_modify_program_headers
8059fb19 5465
8a9036a4
L		 5466/* Intel L1OM support. */
5467
5468static bfd_boolean
5469elf64_l1om_elf_object_p (bfd *abfd)
5470{
5471 /* Set the right machine number for an L1OM elf64 file. */
5472 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5473 return TRUE;
5474}
5475
5476#undef TARGET_LITTLE_SYM
5477#define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5478#undef TARGET_LITTLE_NAME
5479#define TARGET_LITTLE_NAME "elf64-l1om"
5480#undef ELF_ARCH
5481#define ELF_ARCH bfd_arch_l1om
5482
5483#undef ELF_MACHINE_CODE
5484#define ELF_MACHINE_CODE EM_L1OM
5485
5486#undef ELF_OSABI
5487
5488#undef elf64_bed
5489#define elf64_bed elf64_l1om_bed
5490
5491#undef elf_backend_object_p
5492#define elf_backend_object_p elf64_l1om_elf_object_p
5493
8059fb19
RM		 5494/* Restore defaults. */
5495#undef ELF_MAXPAGESIZE
5496#undef ELF_MINPAGESIZE
5497#undef ELF_COMMONPAGESIZE
5498#define ELF_MAXPAGESIZE 0x200000
5499#define ELF_MINPAGESIZE 0x1000
5500#define ELF_COMMONPAGESIZE 0x1000
5501#undef elf_backend_plt_alignment
5502#define elf_backend_plt_alignment 4
5503#undef elf_backend_arch_data
5504#define elf_backend_arch_data &elf_x86_64_arch_bed
1a0c107f 5505
8a9036a4
L		 5506#include "elf64-target.h"
5507
5508/* FreeBSD L1OM support. */
5509
5510#undef TARGET_LITTLE_SYM
5511#define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5512#undef TARGET_LITTLE_NAME
5513#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5514
5515#undef ELF_OSABI
5516#define ELF_OSABI ELFOSABI_FREEBSD
5517
5518#undef elf64_bed
5519#define elf64_bed elf64_l1om_fbsd_bed
5520
8a9036a4 5521#include "elf64-target.h"
351f65ca 5522
7a9068fe
L		 5523/* Intel K1OM support. */
5524
5525static bfd_boolean
5526elf64_k1om_elf_object_p (bfd *abfd)
5527{
5528 /* Set the right machine number for an K1OM elf64 file. */
5529 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
5530 return TRUE;
5531}
5532
5533#undef TARGET_LITTLE_SYM
5534#define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
5535#undef TARGET_LITTLE_NAME
5536#define TARGET_LITTLE_NAME "elf64-k1om"
5537#undef ELF_ARCH
5538#define ELF_ARCH bfd_arch_k1om
5539
5540#undef ELF_MACHINE_CODE
5541#define ELF_MACHINE_CODE EM_K1OM
5542
5543#undef ELF_OSABI
5544
5545#undef elf64_bed
5546#define elf64_bed elf64_k1om_bed
5547
5548#undef elf_backend_object_p
5549#define elf_backend_object_p elf64_k1om_elf_object_p
5550
5551#undef elf_backend_static_tls_alignment
5552
5553#undef elf_backend_want_plt_sym
5554#define elf_backend_want_plt_sym 0
5555
5556#include "elf64-target.h"
5557
5558/* FreeBSD K1OM support. */
5559
5560#undef TARGET_LITTLE_SYM
5561#define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
5562#undef TARGET_LITTLE_NAME
5563#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5564
5565#undef ELF_OSABI
5566#define ELF_OSABI ELFOSABI_FREEBSD
5567
5568#undef elf64_bed
5569#define elf64_bed elf64_k1om_fbsd_bed
5570
5571#include "elf64-target.h"
5572
351f65ca
L		 5573/* 32bit x86-64 support. */
5574
351f65ca
L		 5575#undef TARGET_LITTLE_SYM
5576#define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5577#undef TARGET_LITTLE_NAME
5578#define TARGET_LITTLE_NAME "elf32-x86-64"
8059fb19 5579#undef elf32_bed
351f65ca
L		 5580
5581#undef ELF_ARCH
5582#define ELF_ARCH bfd_arch_i386
5583
5584#undef ELF_MACHINE_CODE
5585#define ELF_MACHINE_CODE EM_X86_64
5586
351f65ca
L		 5587#undef ELF_OSABI
5588
351f65ca
L		 5589#undef elf_backend_object_p
5590#define elf_backend_object_p \
5591 elf32_x86_64_elf_object_p
5592
5593#undef elf_backend_bfd_from_remote_memory
5594#define elf_backend_bfd_from_remote_memory \
5595 _bfd_elf32_bfd_from_remote_memory
5596
5597#undef elf_backend_size_info
5598#define elf_backend_size_info \
5599 _bfd_elf32_size_info
5600
5601#include "elf32-target.h"
GDB Binutils - Deliverables
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