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Convert mov to lea in size_dynamic_sections
[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 {
452 prpsinfo_t data;
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 {
493 prstatus_t prstat;
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
2598 /* Nothing to do if there are no codes or no relocations. */
2599 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2600 || sec->reloc_count == 0)
2601 return TRUE;
2602
2603 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2604
2605 /* Load the relocations for this section. */
2606 internal_relocs = (_bfd_elf_link_read_relocs
2607 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2608 link_info->keep_memory));
2609 if (internal_relocs == NULL)
2610 return FALSE;
2611
2612 htab = elf_x86_64_hash_table (link_info);
2613 changed_contents = FALSE;
2614 changed_relocs = FALSE;
2615 local_got_refcounts = elf_local_got_refcounts (abfd);
2616
2617 /* Get the section contents. */
2618 if (elf_section_data (sec)->this_hdr.contents != NULL)
2619 contents = elf_section_data (sec)->this_hdr.contents;
2620 else
2621 {
2622 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2623 goto error_return;
2624 }
2625
2626 irelend = internal_relocs + sec->reloc_count;
2627 for (irel = internal_relocs; irel < irelend; irel++)
2628 {
2629 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2630 unsigned int r_symndx = htab->r_sym (irel->r_info);
2631 unsigned int indx;
2632 struct elf_link_hash_entry *h;
2633
2634 if (r_type != R_X86_64_GOTPCREL)
2635 continue;
2636
2637 /* Get the symbol referred to by the reloc. */
2638 if (r_symndx < symtab_hdr->sh_info)
2639 {
2640 Elf_Internal_Sym *isym;
2641
2642 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2643 abfd, r_symndx);
2644
2645 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2646 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2647 && bfd_get_8 (input_bfd,
2648 contents + irel->r_offset - 2) == 0x8b)
2649 {
2650 bfd_put_8 (output_bfd, 0x8d,
2651 contents + irel->r_offset - 2);
2652 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2653 if (local_got_refcounts != NULL
2654 && local_got_refcounts[r_symndx] > 0)
2655 local_got_refcounts[r_symndx] -= 1;
2656 changed_contents = TRUE;
2657 changed_relocs = TRUE;
2658 }
2659 continue;
2660 }
2661
2662 indx = r_symndx - symtab_hdr->sh_info;
2663 h = elf_sym_hashes (abfd)[indx];
2664 BFD_ASSERT (h != NULL);
2665
2666 while (h->root.type == bfd_link_hash_indirect
2667 || h->root.type == bfd_link_hash_warning)
2668 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2669
2670 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2671 if (h->def_regular
2672 && h->type != STT_GNU_IFUNC
2673 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2674 && bfd_get_8 (input_bfd,
2675 contents + irel->r_offset - 2) == 0x8b)
2676 {
2677 bfd_put_8 (output_bfd, 0x8d,
2678 contents + irel->r_offset - 2);
2679 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2680 if (h->got.refcount > 0)
2681 h->got.refcount -= 1;
2682 changed_contents = TRUE;
2683 changed_relocs = TRUE;
2684 }
2685 }
2686
2687 if (contents != NULL
2688 && elf_section_data (sec)->this_hdr.contents != contents)
2689 {
2690 if (!changed_contents && !link_info->keep_memory)
2691 free (contents);
2692 else
2693 {
2694 /* Cache the section contents for elf_link_input_bfd. */
2695 elf_section_data (sec)->this_hdr.contents = contents;
2696 }
2697 }
2698
2699 if (elf_section_data (sec)->relocs != internal_relocs)
2700 {
2701 if (!changed_relocs)
2702 free (internal_relocs);
2703 else
2704 elf_section_data (sec)->relocs = internal_relocs;
2705 }
2706
2707 return TRUE;
2708
2709 error_return:
2710 if (contents != NULL
2711 && elf_section_data (sec)->this_hdr.contents != contents)
2712 free (contents);
2713 if (internal_relocs != NULL
2714 && elf_section_data (sec)->relocs != internal_relocs)
2715 free (internal_relocs);
2716 return FALSE;
2717}
2718
70256ad8
AJ		 2719/* Set the sizes of the dynamic sections. */
2720
b34976b6 2721static bfd_boolean
351f65ca
L		 2722elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2723 struct bfd_link_info *info)
70256ad8 2724{
351f65ca 2725 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 2726 bfd *dynobj;
2727 asection *s;
b34976b6 2728 bfd_boolean relocs;
c434dee6 2729 bfd *ibfd;
351f65ca 2730 const struct elf_backend_data *bed;
70256ad8 2731
351f65ca 2732 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2733 if (htab == NULL)
2734 return FALSE;
351f65ca 2735 bed = get_elf_backend_data (output_bfd);
4dfe6ac6 2736
c434dee6
AJ		 2737 dynobj = htab->elf.dynobj;
2738 if (dynobj == NULL)
2739 abort ();
70256ad8 2740
c434dee6 2741 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 2742 {
2743 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 2744 if (info->executable)
70256ad8 2745 {
3d4d4302 2746 s = bfd_get_linker_section (dynobj, ".interp");
c434dee6
AJ		 2747 if (s == NULL)
2748 abort ();
351f65ca
L		 2749 s->size = htab->dynamic_interpreter_size;
2750 s->contents = (unsigned char *) htab->dynamic_interpreter;
70256ad8
AJ		 2751 }
2752 }
70256ad8 2753
c434dee6
AJ		 2754 /* Set up .got offsets for local syms, and space for local dynamic
2755 relocs. */
2756 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
70256ad8 2757 {
c434dee6
AJ		 2758 bfd_signed_vma *local_got;
2759 bfd_signed_vma *end_local_got;
bffbf940 2760 char *local_tls_type;
67a4f2b7 2761 bfd_vma *local_tlsdesc_gotent;
c434dee6
AJ		 2762 bfd_size_type locsymcount;
2763 Elf_Internal_Shdr *symtab_hdr;
2764 asection *srel;
70256ad8 2765
0ffa91dd 2766 if (! is_x86_64_elf (ibfd))
70256ad8
AJ		 2767 continue;
2768
c434dee6 2769 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 2770 {
e03a8ed8 2771 struct elf_dyn_relocs *p;
c434dee6 2772
daa67607
L		 2773 if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info))
2774 return FALSE;
2775
e03a8ed8 2776 for (p = (struct elf_dyn_relocs *)
e81d3500 2777 (elf_section_data (s)->local_dynrel);
c434dee6
AJ		 2778 p != NULL;
2779 p = p->next)
70256ad8 2780 {
c434dee6
AJ		 2781 if (!bfd_is_abs_section (p->sec)
2782 && bfd_is_abs_section (p->sec->output_section))
2783 {
2784 /* Input section has been discarded, either because
2785 it is a copy of a linkonce section or due to
2786 linker script /DISCARD/, so we'll be discarding
2787 the relocs too. */
2788 }
2789 else if (p->count != 0)
2790 {
2791 srel = elf_section_data (p->sec)->sreloc;
351f65ca 2792 srel->size += p->count * bed->s->sizeof_rela;
4b819e1f
L		 2793 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2794 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 2795 {
2796 info->flags |= DF_TEXTREL;
2797 if (info->warn_shared_textrel && info->shared)
2798 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2799 p->sec->owner, p->sec);
b70321a2 2800 }
c434dee6 2801 }
70256ad8
AJ		 2802 }
2803 }
c434dee6
AJ		 2804
2805 local_got = elf_local_got_refcounts (ibfd);
2806 if (!local_got)
2807 continue;
2808
0ffa91dd 2809 symtab_hdr = &elf_symtab_hdr (ibfd);
c434dee6
AJ		 2810 locsymcount = symtab_hdr->sh_info;
2811 end_local_got = local_got + locsymcount;
351f65ca
L		 2812 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
2813 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 2814 s = htab->elf.sgot;
2815 srel = htab->elf.srelgot;
67a4f2b7
AO		 2816 for (; local_got < end_local_got;
2817 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
70256ad8 2818 {
67a4f2b7 2819 *local_tlsdesc_gotent = (bfd_vma) -1;
c434dee6 2820 if (*local_got > 0)
70256ad8 2821 {
67a4f2b7
AO		 2822 if (GOT_TLS_GDESC_P (*local_tls_type))
2823 {
6de2ae4a 2824 *local_tlsdesc_gotent = htab->elf.sgotplt->size
351f65ca 2825 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2826 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 2827 *local_got = (bfd_vma) -2;
2828 }
2829 if (! GOT_TLS_GDESC_P (*local_tls_type)
2830 || GOT_TLS_GD_P (*local_tls_type))
2831 {
2832 *local_got = s->size;
2833 s->size += GOT_ENTRY_SIZE;
2834 if (GOT_TLS_GD_P (*local_tls_type))
2835 s->size += GOT_ENTRY_SIZE;
2836 }
bffbf940 2837 if (info->shared
67a4f2b7 2838 || GOT_TLS_GD_ANY_P (*local_tls_type)
bffbf940 2839 || *local_tls_type == GOT_TLS_IE)
67a4f2b7
AO		 2840 {
2841 if (GOT_TLS_GDESC_P (*local_tls_type))
2842 {
6de2ae4a 2843 htab->elf.srelplt->size
351f65ca 2844 += bed->s->sizeof_rela;
67a4f2b7
AO		 2845 htab->tlsdesc_plt = (bfd_vma) -1;
2846 }
2847 if (! GOT_TLS_GDESC_P (*local_tls_type)
2848 || GOT_TLS_GD_P (*local_tls_type))
351f65ca 2849 srel->size += bed->s->sizeof_rela;
67a4f2b7 2850 }
70256ad8
AJ		 2851 }
2852 else
c434dee6
AJ		 2853 *local_got = (bfd_vma) -1;
2854 }
2855 }
70256ad8 2856
bffbf940
JJ		 2857 if (htab->tls_ld_got.refcount > 0)
2858 {
2859 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2860 relocs. */
6de2ae4a
L		 2861 htab->tls_ld_got.offset = htab->elf.sgot->size;
2862 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
351f65ca 2863 htab->elf.srelgot->size += bed->s->sizeof_rela;
bffbf940
JJ		 2864 }
2865 else
2866 htab->tls_ld_got.offset = -1;
2867
c434dee6
AJ		 2868 /* Allocate global sym .plt and .got entries, and space for global
2869 sym dynamic relocs. */
351f65ca 2870 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
eb4ff4d6 2871 info);
c434dee6 2872
c25bc9fc
L		 2873 /* Allocate .plt and .got entries, and space for local symbols. */
2874 htab_traverse (htab->loc_hash_table,
351f65ca 2875 elf_x86_64_allocate_local_dynrelocs,
c25bc9fc
L		 2876 info);
2877
67a4f2b7
AO		 2878 /* For every jump slot reserved in the sgotplt, reloc_count is
2879 incremented. However, when we reserve space for TLS descriptors,
2880 it's not incremented, so in order to compute the space reserved
2881 for them, it suffices to multiply the reloc count by the jump
e1f98742
L		 2882 slot size.
2883
2884 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2885 so that R_X86_64_IRELATIVE entries come last. */
6de2ae4a 2886 if (htab->elf.srelplt)
e1f98742
L		 2887 {
2888 htab->sgotplt_jump_table_size
2889 = elf_x86_64_compute_jump_table_size (htab);
2890 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2891 }
2892 else if (htab->elf.irelplt)
2893 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
67a4f2b7
AO		 2894
2895 if (htab->tlsdesc_plt)
2896 {
2897 /* If we're not using lazy TLS relocations, don't generate the
2898 PLT and GOT entries they require. */
2899 if ((info->flags & DF_BIND_NOW))
2900 htab->tlsdesc_plt = 0;
2901 else
2902 {
6de2ae4a
L		 2903 htab->tlsdesc_got = htab->elf.sgot->size;
2904 htab->elf.sgot->size += GOT_ENTRY_SIZE;
67a4f2b7
AO		 2905 /* Reserve room for the initial entry.
2906 FIXME: we could probably do away with it in this case. */
6de2ae4a 2907 if (htab->elf.splt->size == 0)
eed180f8 2908 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
6de2ae4a 2909 htab->tlsdesc_plt = htab->elf.splt->size;
eed180f8 2910 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
67a4f2b7
AO		 2911 }
2912 }
2913
a7b16ceb
L		 2914 if (htab->elf.sgotplt)
2915 {
e28df02b
L		 2916 struct elf_link_hash_entry *got;
2917 got = elf_link_hash_lookup (elf_hash_table (info),
2918 "_GLOBAL_OFFSET_TABLE_",
2919 FALSE, FALSE, FALSE);
2920
a7b16ceb 2921 /* Don't allocate .got.plt section if there are no GOT nor PLT
eed180f8 2922 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
e28df02b
L		 2923 if ((got == NULL
2924 || !got->ref_regular_nonweak)
2925 && (htab->elf.sgotplt->size
2926 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 2927 && (htab->elf.splt == NULL
2928 || htab->elf.splt->size == 0)
2929 && (htab->elf.sgot == NULL
2930 || htab->elf.sgot->size == 0)
2931 && (htab->elf.iplt == NULL
2932 || htab->elf.iplt->size == 0)
2933 && (htab->elf.igotplt == NULL
2934 || htab->elf.igotplt->size == 0))
2935 htab->elf.sgotplt->size = 0;
2936 }
2937
9a2a56cc
AM		 2938 if (htab->plt_eh_frame != NULL
2939 && htab->elf.splt != NULL
2940 && htab->elf.splt->size != 0
2941 && !bfd_is_abs_section (htab->elf.splt->output_section)
2942 && _bfd_elf_eh_frame_present (info))
2943 {
2944 const struct elf_x86_64_backend_data *arch_data
2945 = (const struct elf_x86_64_backend_data *) bed->arch_data;
2946 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
2947 }
2948
c434dee6
AJ		 2949 /* We now have determined the sizes of the various dynamic sections.
2950 Allocate memory for them. */
b34976b6 2951 relocs = FALSE;
c434dee6
AJ		 2952 for (s = dynobj->sections; s != NULL; s = s->next)
2953 {
2954 if ((s->flags & SEC_LINKER_CREATED) == 0)
2955 continue;
2956
6de2ae4a
L		 2957 if (s == htab->elf.splt
2958 || s == htab->elf.sgot
2959 || s == htab->elf.sgotplt
2960 || s == htab->elf.iplt
2961 || s == htab->elf.igotplt
9a2a56cc 2962 || s == htab->plt_eh_frame
75ff4589 2963 || s == htab->sdynbss)
c434dee6
AJ		 2964 {
2965 /* Strip this section if we don't need it; see the
2966 comment below. */
2967 }
0112cd26 2968 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
c434dee6 2969 {
6de2ae4a 2970 if (s->size != 0 && s != htab->elf.srelplt)
b34976b6 2971 relocs = TRUE;
c434dee6
AJ		 2972
2973 /* We use the reloc_count field as a counter if we need
2974 to copy relocs into the output file. */
6de2ae4a 2975 if (s != htab->elf.srelplt)
67a4f2b7 2976 s->reloc_count = 0;
70256ad8 2977 }
c434dee6 2978 else
70256ad8
AJ		 2979 {
2980 /* It's not one of our sections, so don't allocate space. */
2981 continue;
2982 }
2983
eea6121a 2984 if (s->size == 0)
70256ad8 2985 {
c434dee6
AJ		 2986 /* If we don't need this section, strip it from the
2987 output file. This is mostly to handle .rela.bss and
2988 .rela.plt. We must create both sections in
2989 create_dynamic_sections, because they must be created
2990 before the linker maps input sections to output
2991 sections. The linker does that before
2992 adjust_dynamic_symbol is called, and it is that
2993 function which decides whether anything needs to go
2994 into these sections. */
2995
8423293d 2996 s->flags |= SEC_EXCLUDE;
70256ad8
AJ		 2997 continue;
2998 }
2999
c456f082
AM		 3000 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3001 continue;
3002
70256ad8
AJ		 3003 /* Allocate memory for the section contents. We use bfd_zalloc
3004 here in case unused entries are not reclaimed before the
3005 section's contents are written out. This should not happen,
3006 but this way if it does, we get a R_X86_64_NONE reloc instead
3007 of garbage. */
eea6121a 3008 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
c434dee6 3009 if (s->contents == NULL)
b34976b6 3010 return FALSE;
70256ad8
AJ		 3011 }
3012
e41b3a13 3013 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 3014 && htab->plt_eh_frame->contents != NULL)
3015 {
3016 const struct elf_x86_64_backend_data *arch_data
3017 = (const struct elf_x86_64_backend_data *) bed->arch_data;
3018
3019 memcpy (htab->plt_eh_frame->contents,
3020 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3021 bfd_put_32 (dynobj, htab->elf.splt->size,
3022 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3023 }
e41b3a13 3024
c434dee6 3025 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 3026 {
3027 /* Add some entries to the .dynamic section. We fill in the
351f65ca 3028 values later, in elf_x86_64_finish_dynamic_sections, but we
70256ad8 3029 must add the entries now so that we get the correct size for
407443a3 3030 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 3031 dynamic linker and used by the debugger. */
dc810e39 3032#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3033 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3034
36af4a4e 3035 if (info->executable)
70256ad8 3036 {
dc810e39 3037 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3038 return FALSE;
70256ad8
AJ		 3039 }
3040
6de2ae4a 3041 if (htab->elf.splt->size != 0)
70256ad8 3042 {
dc810e39
AM		 3043 if (!add_dynamic_entry (DT_PLTGOT, 0)
3044 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3045 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3046 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 3047 return FALSE;
67a4f2b7
AO		 3048
3049 if (htab->tlsdesc_plt
3050 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3051 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3052 return FALSE;
70256ad8
AJ		 3053 }
3054
3055 if (relocs)
3056 {
dc810e39
AM		 3057 if (!add_dynamic_entry (DT_RELA, 0)
3058 || !add_dynamic_entry (DT_RELASZ, 0)
351f65ca 3059 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
b34976b6 3060 return FALSE;
70256ad8 3061
c434dee6
AJ		 3062 /* If any dynamic relocs apply to a read-only section,
3063 then we need a DT_TEXTREL entry. */
3064 if ((info->flags & DF_TEXTREL) == 0)
eed180f8 3065 elf_link_hash_traverse (&htab->elf,
351f65ca 3066 elf_x86_64_readonly_dynrelocs,
eb4ff4d6 3067 info);
c434dee6
AJ		 3068
3069 if ((info->flags & DF_TEXTREL) != 0)
3070 {
3071 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3072 return FALSE;
c434dee6 3073 }
70256ad8
AJ		 3074 }
3075 }
dc810e39 3076#undef add_dynamic_entry
70256ad8 3077
b34976b6 3078 return TRUE;
70256ad8
AJ		 3079}
3080
67a4f2b7 3081static bfd_boolean
351f65ca
L		 3082elf_x86_64_always_size_sections (bfd *output_bfd,
3083 struct bfd_link_info *info)
67a4f2b7
AO		 3084{
3085 asection *tls_sec = elf_hash_table (info)->tls_sec;
3086
3087 if (tls_sec)
3088 {
3089 struct elf_link_hash_entry *tlsbase;
3090
3091 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3092 "_TLS_MODULE_BASE_",
3093 FALSE, FALSE, FALSE);
3094
3095 if (tlsbase && tlsbase->type == STT_TLS)
3096 {
351f65ca 3097 struct elf_x86_64_link_hash_table *htab;
67a4f2b7
AO		 3098 struct bfd_link_hash_entry *bh = NULL;
3099 const struct elf_backend_data *bed
3100 = get_elf_backend_data (output_bfd);
3101
351f65ca 3102 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3103 if (htab == NULL)
3104 return FALSE;
3105
67a4f2b7
AO		 3106 if (!(_bfd_generic_link_add_one_symbol
3107 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3108 tls_sec, 0, NULL, FALSE,
3109 bed->collect, &bh)))
3110 return FALSE;
9f03412a 3111
4dfe6ac6 3112 htab->tls_module_base = bh;
9f03412a 3113
67a4f2b7
AO		 3114 tlsbase = (struct elf_link_hash_entry *)bh;
3115 tlsbase->def_regular = 1;
3116 tlsbase->other = STV_HIDDEN;
3117 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3118 }
3119 }
3120
3121 return TRUE;
3122}
3123
9f03412a
AO		 3124/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3125 executables. Rather than setting it to the beginning of the TLS
3126 section, we have to set it to the end. This function may be called
3127 multiple times, it is idempotent. */
3128
3129static void
351f65ca 3130elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3131{
351f65ca 3132 struct elf_x86_64_link_hash_table *htab;
9f03412a
AO		 3133 struct bfd_link_hash_entry *base;
3134
3135 if (!info->executable)
3136 return;
3137
351f65ca 3138 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3139 if (htab == NULL)
3140 return;
9f03412a 3141
4dfe6ac6
NC		 3142 base = htab->tls_module_base;
3143 if (base == NULL)
9f03412a
AO		 3144 return;
3145
4dfe6ac6 3146 base->u.def.value = htab->elf.tls_size;
9f03412a
AO		 3147}
3148
bffbf940
JJ		 3149/* Return the base VMA address which should be subtracted from real addresses
3150 when resolving @dtpoff relocation.
3151 This is PT_TLS segment p_vaddr. */
3152
3153static bfd_vma
351f65ca 3154elf_x86_64_dtpoff_base (struct bfd_link_info *info)
bffbf940 3155{
e1918d23
AM		 3156 /* If tls_sec is NULL, we should have signalled an error already. */
3157 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 3158 return 0;
e1918d23 3159 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ		 3160}
3161
3162/* Return the relocation value for @tpoff relocation
3163 if STT_TLS virtual address is ADDRESS. */
3164
3165static bfd_vma
351f65ca 3166elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 3167{
e1918d23 3168 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3169 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3170 bfd_vma static_tls_size;
bffbf940
JJ		 3171
3172 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 3173 if (htab->tls_sec == NULL)
bffbf940 3174 return 0;
7dc98aea
RO		 3175
3176 /* Consider special static TLS alignment requirements. */
3177 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3178 return address - static_tls_size - htab->tls_sec->vma;
bffbf940
JJ		 3179}
3180
90f487df
L		 3181/* Is the instruction before OFFSET in CONTENTS a 32bit relative
3182 branch? */
3183
3184static bfd_boolean
3185is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3186{
3187 /* Opcode Instruction
3188 0xe8 call
3189 0xe9 jump
3190 0x0f 0x8x conditional jump */
3191 return ((offset > 0
3192 && (contents [offset - 1] == 0xe8
3193 || contents [offset - 1] == 0xe9))
3194 || (offset > 1
3195 && contents [offset - 2] == 0x0f
3196 && (contents [offset - 1] & 0xf0) == 0x80));
3197}
3198
8d88c4ca
NC		 3199/* Relocate an x86_64 ELF section. */
3200
b34976b6 3201static bfd_boolean
351f65ca
L		 3202elf_x86_64_relocate_section (bfd *output_bfd,
3203 struct bfd_link_info *info,
3204 bfd *input_bfd,
3205 asection *input_section,
3206 bfd_byte *contents,
3207 Elf_Internal_Rela *relocs,
3208 Elf_Internal_Sym *local_syms,
3209 asection **local_sections)
8d88c4ca 3210{
351f65ca 3211 struct elf_x86_64_link_hash_table *htab;
8d88c4ca
NC		 3212 Elf_Internal_Shdr *symtab_hdr;
3213 struct elf_link_hash_entry **sym_hashes;
3214 bfd_vma *local_got_offsets;
67a4f2b7 3215 bfd_vma *local_tlsdesc_gotents;
c434dee6 3216 Elf_Internal_Rela *rel;
8d88c4ca 3217 Elf_Internal_Rela *relend;
eed180f8 3218 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
8d88c4ca 3219
0ffa91dd
NC		 3220 BFD_ASSERT (is_x86_64_elf (input_bfd));
3221
351f65ca 3222 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3223 if (htab == NULL)
3224 return FALSE;
0ffa91dd 3225 symtab_hdr = &elf_symtab_hdr (input_bfd);
8d88c4ca
NC		 3226 sym_hashes = elf_sym_hashes (input_bfd);
3227 local_got_offsets = elf_local_got_offsets (input_bfd);
351f65ca 3228 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
8d88c4ca 3229
351f65ca 3230 elf_x86_64_set_tls_module_base (info);
9f03412a 3231
c434dee6 3232 rel = relocs;
8d88c4ca 3233 relend = relocs + input_section->reloc_count;
c434dee6 3234 for (; rel < relend; rel++)
8d88c4ca 3235 {
bffbf940 3236 unsigned int r_type;
8d88c4ca
NC		 3237 reloc_howto_type *howto;
3238 unsigned long r_symndx;
3239 struct elf_link_hash_entry *h;
3240 Elf_Internal_Sym *sym;
3241 asection *sec;
67a4f2b7 3242 bfd_vma off, offplt;
8d88c4ca 3243 bfd_vma relocation;
b34976b6 3244 bfd_boolean unresolved_reloc;
8d88c4ca 3245 bfd_reloc_status_type r;
bffbf940 3246 int tls_type;
cbe950e9 3247 asection *base_got;
8d88c4ca 3248
351f65ca 3249 r_type = ELF32_R_TYPE (rel->r_info);
fe4770f4
AJ		 3250 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3251 || r_type == (int) R_X86_64_GNU_VTENTRY)
3252 continue;
8d88c4ca 3253
bffbf940 3254 if (r_type >= R_X86_64_max)
8da6118f
KH		 3255 {
3256 bfd_set_error (bfd_error_bad_value);
b34976b6 3257 return FALSE;
8da6118f 3258 }
8d88c4ca 3259
d7921315 3260 if (r_type != (int) R_X86_64_32
eed180f8 3261 || ABI_64_P (output_bfd))
d7921315
L		 3262 howto = x86_64_elf_howto_table + r_type;
3263 else
3264 howto = (x86_64_elf_howto_table
3265 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
351f65ca 3266 r_symndx = htab->r_sym (rel->r_info);
8d88c4ca
NC		 3267 h = NULL;
3268 sym = NULL;
3269 sec = NULL;
b34976b6 3270 unresolved_reloc = FALSE;
8d88c4ca 3271 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH		 3272 {
3273 sym = local_syms + r_symndx;
3274 sec = local_sections[r_symndx];
c434dee6 3275
c25bc9fc
L		 3276 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3277 &sec, rel);
3278
3279 /* Relocate against local STT_GNU_IFUNC symbol. */
1f85278f 3280 if (!info->relocatable
351f65ca 3281 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc 3282 {
351f65ca
L		 3283 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3284 rel, FALSE);
c25bc9fc
L		 3285 if (h == NULL)
3286 abort ();
3287
eed180f8 3288 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3289 h->root.u.def.value = sym->st_value;
3290 h->root.u.def.section = sec;
3291 }
8da6118f 3292 }
8d88c4ca 3293 else
8da6118f 3294 {
c9736ba0 3295 bfd_boolean warned ATTRIBUTE_UNUSED;
c434dee6 3296
b2a8e766
AM		 3297 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3298 r_symndx, symtab_hdr, sym_hashes,
3299 h, sec, relocation,
3300 unresolved_reloc, warned);
8da6118f 3301 }
ab96bf03 3302
dbaa2011 3303 if (sec != NULL && discarded_section (sec))
0672748a 3304 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 3305 rel, 1, relend, howto, 0, contents);
ab96bf03
AM		 3306
3307 if (info->relocatable)
3308 continue;
3309
64d25c44
L		 3310 if (rel->r_addend == 0
3311 && r_type == R_X86_64_64
3312 && !ABI_64_P (output_bfd))
3313 {
3314 /* For x32, treat R_X86_64_64 like R_X86_64_32 and zero-extend
3315 it to 64bit if addend is zero. */
3316 r_type = R_X86_64_32;
3317 memset (contents + rel->r_offset + 4, 0, 4);
3318 }
3319
cbe950e9
L		 3320 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3321 it here if it is defined in a non-shared object. */
3322 if (h != NULL
3323 && h->type == STT_GNU_IFUNC
3324 && h->def_regular)
3325 {
3326 asection *plt;
3327 bfd_vma plt_index;
4c544807 3328 const char *name;
cbe950e9
L		 3329
3330 if ((input_section->flags & SEC_ALLOC) == 0
3331 || h->plt.offset == (bfd_vma) -1)
3332 abort ();
3333
3334 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3335 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
cbe950e9
L		 3336 relocation = (plt->output_section->vma
3337 + plt->output_offset + h->plt.offset);
3338
3339 switch (r_type)
3340 {
3341 default:
4c544807
L		 3342 if (h->root.root.string)
3343 name = h->root.root.string;
3344 else
3345 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3346 NULL);
cbe950e9
L		 3347 (*_bfd_error_handler)
3348 (_("%B: relocation %s against STT_GNU_IFUNC "
3349 "symbol `%s' isn't handled by %s"), input_bfd,
3350 x86_64_elf_howto_table[r_type].name,
4c544807 3351 name, __FUNCTION__);
cbe950e9
L		 3352 bfd_set_error (bfd_error_bad_value);
3353 return FALSE;
3354
3355 case R_X86_64_32S:
710ab287 3356 if (info->shared)
cbe950e9 3357 abort ();
710ab287
L		 3358 goto do_relocation;
3359
248775ba
L		 3360 case R_X86_64_32:
3361 if (ABI_64_P (output_bfd))
3362 goto do_relocation;
17672001 3363 /* FALLTHROUGH */
eed180f8 3364 case R_X86_64_64:
710ab287
L		 3365 if (rel->r_addend != 0)
3366 {
4c544807
L		 3367 if (h->root.root.string)
3368 name = h->root.root.string;
3369 else
3370 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3371 sym, NULL);
710ab287
L		 3372 (*_bfd_error_handler)
3373 (_("%B: relocation %s against STT_GNU_IFUNC "
3374 "symbol `%s' has non-zero addend: %d"),
3375 input_bfd, x86_64_elf_howto_table[r_type].name,
4c544807 3376 name, rel->r_addend);
710ab287
L		 3377 bfd_set_error (bfd_error_bad_value);
3378 return FALSE;
3379 }
3380
3381 /* Generate dynamic relcoation only when there is a
c293fa49 3382 non-GOT reference in a shared object. */
710ab287
L		 3383 if (info->shared && h->non_got_ref)
3384 {
3385 Elf_Internal_Rela outrel;
710ab287
L		 3386 asection *sreloc;
3387
c25bc9fc
L		 3388 /* Need a dynamic relocation to get the real function
3389 address. */
710ab287
L		 3390 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3391 info,
3392 input_section,
3393 rel->r_offset);
3394 if (outrel.r_offset == (bfd_vma) -1
3395 || outrel.r_offset == (bfd_vma) -2)
3396 abort ();
3397
3398 outrel.r_offset += (input_section->output_section->vma
3399 + input_section->output_offset);
3400
3401 if (h->dynindx == -1
44c4ea11
L		 3402 || h->forced_local
3403 || info->executable)
710ab287
L		 3404 {
3405 /* This symbol is resolved locally. */
56b8aada
L		 3406 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3407 outrel.r_addend = (h->root.u.def.value
3408 + h->root.u.def.section->output_section->vma
3409 + h->root.u.def.section->output_offset);
710ab287
L		 3410 }
3411 else
3412 {
351f65ca 3413 outrel.r_info = htab->r_info (h->dynindx, r_type);
710ab287
L		 3414 outrel.r_addend = 0;
3415 }
3416
6de2ae4a 3417 sreloc = htab->elf.irelifunc;
351f65ca 3418 elf_append_rela (output_bfd, sreloc, &outrel);
710ab287
L		 3419
3420 /* If this reloc is against an external symbol, we
3421 do not want to fiddle with the addend. Otherwise,
3422 we need to include the symbol value so that it
3423 becomes an addend for the dynamic reloc. For an
3424 internal symbol, we have updated addend. */
56b8aada 3425 continue;
710ab287 3426 }
17672001 3427 /* FALLTHROUGH */
cbe950e9
L		 3428 case R_X86_64_PC32:
3429 case R_X86_64_PC64:
3430 case R_X86_64_PLT32:
3431 goto do_relocation;
3432
3433 case R_X86_64_GOTPCREL:
3434 case R_X86_64_GOTPCREL64:
6de2ae4a 3435 base_got = htab->elf.sgot;
cbe950e9
L		 3436 off = h->got.offset;
3437
7afd84dc 3438 if (base_got == NULL)
cbe950e9
L		 3439 abort ();
3440
7afd84dc 3441 if (off == (bfd_vma) -1)
cbe950e9 3442 {
7afd84dc
L		 3443 /* We can't use h->got.offset here to save state, or
3444 even just remember the offset, as finish_dynamic_symbol
3445 would use that as offset into .got. */
cbe950e9 3446
6de2ae4a 3447 if (htab->elf.splt != NULL)
7afd84dc 3448 {
eed180f8 3449 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 3450 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3451 base_got = htab->elf.sgotplt;
7afd84dc 3452 }
cbe950e9
L		 3453 else
3454 {
eed180f8 3455 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3456 off = plt_index * GOT_ENTRY_SIZE;
6de2ae4a 3457 base_got = htab->elf.igotplt;
7afd84dc
L		 3458 }
3459
3460 if (h->dynindx == -1
3461 || h->forced_local
3462 || info->symbolic)
3463 {
eed180f8 3464 /* This references the local defitionion. We must
7afd84dc 3465 initialize this entry in the global offset table.
eed180f8 3466 Since the offset must always be a multiple of 8,
7afd84dc
L		 3467 we use the least significant bit to record
3468 whether we have initialized it already.
3469
3470 When doing a dynamic link, we create a .rela.got
3471 relocation entry to initialize the value. This
3472 is done in the finish_dynamic_symbol routine. */
3473 if ((off & 1) != 0)
3474 off &= ~1;
3475 else
3476 {
3477 bfd_put_64 (output_bfd, relocation,
3478 base_got->contents + off);
3479 /* Note that this is harmless for the GOTPLT64
3480 case, as -1 | 1 still is -1. */
3481 h->got.offset |= 1;
3482 }
cbe950e9
L		 3483 }
3484 }
3485
3486 relocation = (base_got->output_section->vma
3487 + base_got->output_offset + off);
3488
cbe950e9
L		 3489 goto do_relocation;
3490 }
3491 }
3492
70256ad8
AJ		 3493 /* When generating a shared object, the relocations handled here are
3494 copied into the output file to be resolved at run time. */
3495 switch (r_type)
3496 {
3497 case R_X86_64_GOT32:
7b81dfbb 3498 case R_X86_64_GOT64:
70256ad8
AJ		 3499 /* Relocation is to the entry for this symbol in the global
3500 offset table. */
70256ad8 3501 case R_X86_64_GOTPCREL:
7b81dfbb
AJ		 3502 case R_X86_64_GOTPCREL64:
3503 /* Use global offset table entry as symbol value. */
3504 case R_X86_64_GOTPLT64:
3505 /* This is the same as GOT64 for relocation purposes, but
3506 indicates the existence of a PLT entry. The difficulty is,
3507 that we must calculate the GOT slot offset from the PLT
3508 offset, if this symbol got a PLT entry (it was global).
3509 Additionally if it's computed from the PLT entry, then that
3510 GOT offset is relative to .got.plt, not to .got. */
6de2ae4a 3511 base_got = htab->elf.sgot;
7b81dfbb 3512
6de2ae4a 3513 if (htab->elf.sgot == NULL)
c434dee6 3514 abort ();
053579d7 3515
51e0a107 3516 if (h != NULL)
70256ad8 3517 {
b34976b6 3518 bfd_boolean dyn;
c434dee6
AJ		 3519
3520 off = h->got.offset;
7b81dfbb 3521 if (h->needs_plt
eed180f8 3522 && h->plt.offset != (bfd_vma)-1
7b81dfbb
AJ		 3523 && off == (bfd_vma)-1)
3524 {
3525 /* We can't use h->got.offset here to save
3526 state, or even just remember the offset, as
3527 finish_dynamic_symbol would use that as offset into
3528 .got. */
eed180f8 3529 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
7b81dfbb 3530 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3531 base_got = htab->elf.sgotplt;
7b81dfbb
AJ		 3532 }
3533
c434dee6 3534 dyn = htab->elf.dynamic_sections_created;
51e0a107 3535
27482721 3536 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
51e0a107 3537 || (info->shared
27482721 3538 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ		 3539 || (ELF_ST_VISIBILITY (h->other)
3540 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH		 3541 {
3542 /* This is actually a static link, or it is a -Bsymbolic
3543 link and the symbol is defined locally, or the symbol
407443a3 3544 was forced to be local because of a version file. We
51e0a107
JH		 3545 must initialize this entry in the global offset table.
3546 Since the offset must always be a multiple of 8, we
3547 use the least significant bit to record whether we
3548 have initialized it already.
3549
3550 When doing a dynamic link, we create a .rela.got
407443a3
AJ		 3551 relocation entry to initialize the value. This is
3552 done in the finish_dynamic_symbol routine. */
51e0a107
JH		 3553 if ((off & 1) != 0)
3554 off &= ~1;
3555 else
3556 {
3557 bfd_put_64 (output_bfd, relocation,
7b81dfbb
AJ		 3558 base_got->contents + off);
3559 /* Note that this is harmless for the GOTPLT64 case,
eed180f8 3560 as -1 | 1 still is -1. */
51e0a107
JH		 3561 h->got.offset |= 1;
3562 }
3563 }
053579d7 3564 else
b34976b6 3565 unresolved_reloc = FALSE;
70256ad8 3566 }
51e0a107
JH		 3567 else
3568 {
c434dee6
AJ		 3569 if (local_got_offsets == NULL)
3570 abort ();
51e0a107
JH		 3571
3572 off = local_got_offsets[r_symndx];
3573
3574 /* The offset must always be a multiple of 8. We use
407443a3
AJ		 3575 the least significant bit to record whether we have
3576 already generated the necessary reloc. */
51e0a107
JH		 3577 if ((off & 1) != 0)
3578 off &= ~1;
3579 else
3580 {
c434dee6 3581 bfd_put_64 (output_bfd, relocation,
7b81dfbb 3582 base_got->contents + off);
51e0a107
JH		 3583
3584 if (info->shared)
3585 {
947216bf 3586 asection *s;
51e0a107 3587 Elf_Internal_Rela outrel;
70256ad8 3588
51e0a107
JH		 3589 /* We need to generate a R_X86_64_RELATIVE reloc
3590 for the dynamic linker. */
6de2ae4a 3591 s = htab->elf.srelgot;
947216bf 3592 if (s == NULL)
c434dee6 3593 abort ();
51e0a107 3594
7b81dfbb
AJ		 3595 outrel.r_offset = (base_got->output_section->vma
3596 + base_got->output_offset
51e0a107 3597 + off);
351f65ca 3598 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
51e0a107 3599 outrel.r_addend = relocation;
351f65ca 3600 elf_append_rela (output_bfd, s, &outrel);
51e0a107
JH		 3601 }
3602
3603 local_got_offsets[r_symndx] |= 1;
3604 }
51e0a107 3605 }
6a2bda3f 3606
c434dee6
AJ		 3607 if (off >= (bfd_vma) -2)
3608 abort ();
3609
7b81dfbb
AJ		 3610 relocation = base_got->output_section->vma
3611 + base_got->output_offset + off;
3612 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
6de2ae4a
L		 3613 relocation -= htab->elf.sgotplt->output_section->vma
3614 - htab->elf.sgotplt->output_offset;
c434dee6 3615
70256ad8
AJ		 3616 break;
3617
d6ab8113
JB		 3618 case R_X86_64_GOTOFF64:
3619 /* Relocation is relative to the start of the global offset
3620 table. */
3621
3622 /* Check to make sure it isn't a protected function symbol
3623 for shared library since it may not be local when used
3624 as function address. */
bdb892b9 3625 if (!info->executable
d6ab8113 3626 && h
bdb892b9 3627 && !SYMBOLIC_BIND (info, h)
d6ab8113
JB		 3628 && h->def_regular
3629 && h->type == STT_FUNC
3630 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3631 {
3632 (*_bfd_error_handler)
3633 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3634 input_bfd, h->root.root.string);
3635 bfd_set_error (bfd_error_bad_value);
3636 return FALSE;
3637 }
3638
3639 /* Note that sgot is not involved in this
3640 calculation. We always want the start of .got.plt. If we
3641 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3642 permitted by the ABI, we might have to change this
3643 calculation. */
6de2ae4a
L		 3644 relocation -= htab->elf.sgotplt->output_section->vma
3645 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 3646 break;
3647
3648 case R_X86_64_GOTPC32:
7b81dfbb 3649 case R_X86_64_GOTPC64:
d6ab8113 3650 /* Use global offset table as symbol value. */
6de2ae4a
L		 3651 relocation = htab->elf.sgotplt->output_section->vma
3652 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 3653 unresolved_reloc = FALSE;
3654 break;
7b81dfbb
AJ		 3655
3656 case R_X86_64_PLTOFF64:
3657 /* Relocation is PLT entry relative to GOT. For local
3658 symbols it's the symbol itself relative to GOT. */
eed180f8 3659 if (h != NULL
7b81dfbb
AJ		 3660 /* See PLT32 handling. */
3661 && h->plt.offset != (bfd_vma) -1
6de2ae4a 3662 && htab->elf.splt != NULL)
7b81dfbb 3663 {
6de2ae4a
L		 3664 relocation = (htab->elf.splt->output_section->vma
3665 + htab->elf.splt->output_offset
7b81dfbb
AJ		 3666 + h->plt.offset);
3667 unresolved_reloc = FALSE;
3668 }
3669
6de2ae4a
L		 3670 relocation -= htab->elf.sgotplt->output_section->vma
3671 + htab->elf.sgotplt->output_offset;
7b81dfbb 3672 break;
d6ab8113 3673
70256ad8
AJ		 3674 case R_X86_64_PLT32:
3675 /* Relocation is to the entry for this symbol in the
3676 procedure linkage table. */
3677
3678 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 3679 without using the procedure linkage table. */
70256ad8
AJ		 3680 if (h == NULL)
3681 break;
3682
c434dee6 3683 if (h->plt.offset == (bfd_vma) -1
6de2ae4a 3684 || htab->elf.splt == NULL)
70256ad8
AJ		 3685 {
3686 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ		 3687 happens when statically linking PIC code, or when
3688 using -Bsymbolic. */
70256ad8
AJ		 3689 break;
3690 }
3691
6de2ae4a
L		 3692 relocation = (htab->elf.splt->output_section->vma
3693 + htab->elf.splt->output_offset
70256ad8 3694 + h->plt.offset);
b34976b6 3695 unresolved_reloc = FALSE;
70256ad8
AJ		 3696 break;
3697
fd8ab9e5
AJ		 3698 case R_X86_64_PC8:
3699 case R_X86_64_PC16:
3700 case R_X86_64_PC32:
6610a52d 3701 if (info->shared
ba3bee0b 3702 && (input_section->flags & SEC_ALLOC) != 0
90f487df 3703 && (input_section->flags & SEC_READONLY) != 0
41bed6dd 3704 && h != NULL)
6610a52d 3705 {
41bed6dd
L		 3706 bfd_boolean fail = FALSE;
3707 bfd_boolean branch
3708 = (r_type == R_X86_64_PC32
3709 && is_32bit_relative_branch (contents, rel->r_offset));
3710
3711 if (SYMBOL_REFERENCES_LOCAL (info, h))
3712 {
3713 /* Symbol is referenced locally. Make sure it is
3714 defined locally or for a branch. */
3715 fail = !h->def_regular && !branch;
3716 }
90f487df 3717 else
41bed6dd
L		 3718 {
3719 /* Symbol isn't referenced locally. We only allow
3720 branch to symbol with non-default visibility. */
3721 fail = (!branch
3722 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3723 }
3724
3725 if (fail)
3726 {
3727 const char *fmt;
3728 const char *v;
3729 const char *pic = "";
3730
3731 switch (ELF_ST_VISIBILITY (h->other))
3732 {
3733 case STV_HIDDEN:
3734 v = _("hidden symbol");
3735 break;
3736 case STV_INTERNAL:
3737 v = _("internal symbol");
3738 break;
3739 case STV_PROTECTED:
3740 v = _("protected symbol");
3741 break;
3742 default:
3743 v = _("symbol");
3744 pic = _("; recompile with -fPIC");
3745 break;
3746 }
3747
3748 if (h->def_regular)
3749 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3750 else
3751 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3752
3753 (*_bfd_error_handler) (fmt, input_bfd,
3754 x86_64_elf_howto_table[r_type].name,
3755 v, h->root.root.string, pic);
3756 bfd_set_error (bfd_error_bad_value);
3757 return FALSE;
3758 }
6610a52d
L		 3759 }
3760 /* Fall through. */
3761
70256ad8
AJ		 3762 case R_X86_64_8:
3763 case R_X86_64_16:
3764 case R_X86_64_32:
d6ab8113 3765 case R_X86_64_PC64:
6b3db546 3766 case R_X86_64_64:
80643fbc 3767 /* FIXME: The ABI says the linker should make sure the value is
407443a3 3768 the same when it's zeroextended to 64 bit. */
c434dee6 3769
b1e24c02 3770 if ((input_section->flags & SEC_ALLOC) == 0)
c434dee6
AJ		 3771 break;
3772
3773 if ((info->shared
4bc6e03a
AJ		 3774 && (h == NULL
3775 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3776 || h->root.type != bfd_link_hash_undefweak)
d8045f23
NC		 3777 && (! IS_X86_64_PCREL_TYPE (r_type)
3778 || ! SYMBOL_CALLS_LOCAL (info, h)))
d40d037c
AJ		 3779 || (ELIMINATE_COPY_RELOCS
3780 && !info->shared
c434dee6
AJ		 3781 && h != NULL
3782 && h->dynindx != -1
f5385ebf
AM		 3783 && !h->non_got_ref
3784 && ((h->def_dynamic
3785 && !h->def_regular)
c434dee6 3786 || h->root.type == bfd_link_hash_undefweak
0f88be7a 3787 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ		 3788 {
3789 Elf_Internal_Rela outrel;
b34976b6 3790 bfd_boolean skip, relocate;
c434dee6 3791 asection *sreloc;
70256ad8
AJ		 3792
3793 /* When generating a shared object, these relocations
3794 are copied into the output file to be resolved at run
407443a3 3795 time. */
b34976b6
AM		 3796 skip = FALSE;
3797 relocate = FALSE;
70256ad8 3798
c629eae0
JJ		 3799 outrel.r_offset =
3800 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 3801 rel->r_offset);
c629eae0 3802 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 3803 skip = TRUE;
0fb19cbc 3804 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 3805 skip = TRUE, relocate = TRUE;
70256ad8
AJ		 3806
3807 outrel.r_offset += (input_section->output_section->vma
3808 + input_section->output_offset);
3809
3810 if (skip)
0bb2d96a 3811 memset (&outrel, 0, sizeof outrel);
c434dee6 3812
fd8ab9e5
AJ		 3813 /* h->dynindx may be -1 if this symbol was marked to
3814 become local. */
3815 else if (h != NULL
c434dee6 3816 && h->dynindx != -1
d8045f23
NC		 3817 && (IS_X86_64_PCREL_TYPE (r_type)
3818 || ! info->shared
3819 || ! SYMBOLIC_BIND (info, h)
3820 || ! h->def_regular))
70256ad8 3821 {
351f65ca 3822 outrel.r_info = htab->r_info (h->dynindx, r_type);
c434dee6 3823 outrel.r_addend = rel->r_addend;
70256ad8
AJ		 3824 }
3825 else
3826 {
c434dee6 3827 /* This symbol is local, or marked to become local. */
248775ba 3828 if (r_type == htab->pointer_r_type)
607c0e09 3829 {
b34976b6 3830 relocate = TRUE;
351f65ca 3831 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
607c0e09
AS		 3832 outrel.r_addend = relocation + rel->r_addend;
3833 }
64d25c44
L		 3834 else if (r_type == R_X86_64_64
3835 && !ABI_64_P (output_bfd))
3836 {
3837 relocate = TRUE;
3838 outrel.r_info = htab->r_info (0,
3839 R_X86_64_RELATIVE64);
3840 outrel.r_addend = relocation + rel->r_addend;
8cf0d2dd
L		 3841 /* Check addend overflow. */
3842 if ((outrel.r_addend & 0x80000000)
3843 != (rel->r_addend & 0x80000000))
3844 {
3845 const char *name;
268a8d3a 3846 int addend = rel->r_addend;
8cf0d2dd
L		 3847 if (h && h->root.root.string)
3848 name = h->root.root.string;
3849 else
3850 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3851 sym, NULL);
6f2c9068
L		 3852 if (addend < 0)
3853 (*_bfd_error_handler)
268a8d3a 3854 (_("%B: addend -0x%x in relocation %s against "
6f2c9068
L		 3855 "symbol `%s' at 0x%lx in section `%A' is "
3856 "out of range"),
3857 input_bfd, input_section, addend,
3858 x86_64_elf_howto_table[r_type].name,
3859 name, (unsigned long) rel->r_offset);
3860 else
3861 (*_bfd_error_handler)
268a8d3a 3862 (_("%B: addend 0x%x in relocation %s against "
6f2c9068
L		 3863 "symbol `%s' at 0x%lx in section `%A' is "
3864 "out of range"),
3865 input_bfd, input_section, addend,
3866 x86_64_elf_howto_table[r_type].name,
3867 name, (unsigned long) rel->r_offset);
8cf0d2dd
L		 3868 bfd_set_error (bfd_error_bad_value);
3869 return FALSE;
3870 }
64d25c44 3871 }
607c0e09
AS		 3872 else
3873 {
3874 long sindx;
3875
8517fae7 3876 if (bfd_is_abs_section (sec))
607c0e09
AS		 3877 sindx = 0;
3878 else if (sec == NULL || sec->owner == NULL)
3879 {
3880 bfd_set_error (bfd_error_bad_value);
b34976b6 3881 return FALSE;
607c0e09
AS		 3882 }
3883 else
3884 {
3885 asection *osec;
3886
74541ad4
AM		 3887 /* We are turning this relocation into one
3888 against a section symbol. It would be
3889 proper to subtract the symbol's value,
3890 osec->vma, from the emitted reloc addend,
3891 but ld.so expects buggy relocs. */
607c0e09
AS		 3892 osec = sec->output_section;
3893 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 3894 if (sindx == 0)
3895 {
3896 asection *oi = htab->elf.text_index_section;
3897 sindx = elf_section_data (oi)->dynindx;
3898 }
3899 BFD_ASSERT (sindx != 0);
607c0e09
AS		 3900 }
3901
351f65ca 3902 outrel.r_info = htab->r_info (sindx, r_type);
607c0e09
AS		 3903 outrel.r_addend = relocation + rel->r_addend;
3904 }
70256ad8
AJ		 3905 }
3906
cbe950e9 3907 sreloc = elf_section_data (input_section)->sreloc;
d8045f23 3908
62d78908
L		 3909 if (sreloc == NULL || sreloc->contents == NULL)
3910 {
3911 r = bfd_reloc_notsupported;
3912 goto check_relocation_error;
3913 }
c434dee6 3914
351f65ca 3915 elf_append_rela (output_bfd, sreloc, &outrel);
70256ad8
AJ		 3916
3917 /* If this reloc is against an external symbol, we do
3918 not want to fiddle with the addend. Otherwise, we
3919 need to include the symbol value so that it becomes
3920 an addend for the dynamic reloc. */
0f88be7a 3921 if (! relocate)
70256ad8
AJ		 3922 continue;
3923 }
3924
3925 break;
3926
bffbf940 3927 case R_X86_64_TLSGD:
67a4f2b7
AO		 3928 case R_X86_64_GOTPC32_TLSDESC:
3929 case R_X86_64_TLSDESC_CALL:
bffbf940 3930 case R_X86_64_GOTTPOFF:
bffbf940
JJ		 3931 tls_type = GOT_UNKNOWN;
3932 if (h == NULL && local_got_offsets)
351f65ca 3933 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
bffbf940 3934 else if (h != NULL)
351f65ca 3935 tls_type = elf_x86_64_hash_entry (h)->tls_type;
142411ca 3936
351f65ca
L		 3937 if (! elf_x86_64_tls_transition (info, input_bfd,
3938 input_section, contents,
3939 symtab_hdr, sym_hashes,
3940 &r_type, tls_type, rel,
3941 relend, h, r_symndx))
534a31f6 3942 return FALSE;
bffbf940
JJ		 3943
3944 if (r_type == R_X86_64_TPOFF32)
3945 {
142411ca
L		 3946 bfd_vma roff = rel->r_offset;
3947
bffbf940 3948 BFD_ASSERT (! unresolved_reloc);
142411ca 3949
351f65ca 3950 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
bffbf940 3951 {
52bc799a 3952 /* GD->LE transition. For 64bit, change
abcf1d52 3953 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
a3fadc9a 3954 .word 0x6666; rex64; call __tls_get_addr
52bc799a 3955 into:
bffbf940 3956 movq %fs:0, %rax
52bc799a
L		 3957 leaq foo@tpoff(%rax), %rax
3958 For 32bit, change
3959 leaq foo@tlsgd(%rip), %rdi
3960 .word 0x6666; rex64; call __tls_get_addr
3961 into:
3962 movl %fs:0, %eax
bffbf940 3963 leaq foo@tpoff(%rax), %rax */
52bc799a
L		 3964 if (ABI_64_P (output_bfd))
3965 memcpy (contents + roff - 4,
3966 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3967 16);
3968 else
3969 memcpy (contents + roff - 3,
3970 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3971 15);
eb4ff4d6 3972 bfd_put_32 (output_bfd,
351f65ca 3973 elf_x86_64_tpoff (info, relocation),
142411ca 3974 contents + roff + 8);
a3fadc9a 3975 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
bffbf940
JJ		 3976 rel++;
3977 continue;
3978 }
351f65ca 3979 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
67a4f2b7
AO		 3980 {
3981 /* GDesc -> LE transition.
3982 It's originally something like:
3983 leaq x@tlsdesc(%rip), %rax
3984
3985 Change it to:
c9736ba0 3986 movl $x@tpoff, %rax. */
67a4f2b7 3987
c9736ba0 3988 unsigned int val, type;
67a4f2b7 3989
67a4f2b7 3990 type = bfd_get_8 (input_bfd, contents + roff - 3);
67a4f2b7 3991 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 3992 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
3993 contents + roff - 3);
3994 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
3995 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3996 contents + roff - 1);
eb4ff4d6 3997 bfd_put_32 (output_bfd,
351f65ca 3998 elf_x86_64_tpoff (info, relocation),
67a4f2b7
AO		 3999 contents + roff);
4000 continue;
4001 }
351f65ca 4002 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
67a4f2b7
AO		 4003 {
4004 /* GDesc -> LE transition.
4005 It's originally:
4006 call *(%rax)
4007 Turn it into:
142411ca 4008 xchg %ax,%ax. */
10efb593 4009 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4010 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4011 continue;
4012 }
351f65ca 4013 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
bffbf940 4014 {
bffbf940
JJ		 4015 /* IE->LE transition:
4016 Originally it can be one of:
4017 movq foo@gottpoff(%rip), %reg
4018 addq foo@gottpoff(%rip), %reg
4019 We change it into:
4020 movq $foo, %reg
4021 leaq foo(%reg), %reg
4022 addq $foo, %reg. */
142411ca
L		 4023
4024 unsigned int val, type, reg;
4025
4026 val = bfd_get_8 (input_bfd, contents + roff - 3);
4027 type = bfd_get_8 (input_bfd, contents + roff - 2);
4028 reg = bfd_get_8 (input_bfd, contents + roff - 1);
bffbf940 4029 reg >>= 3;
bffbf940
JJ		 4030 if (type == 0x8b)
4031 {
4032 /* movq */
4033 if (val == 0x4c)
4034 bfd_put_8 (output_bfd, 0x49,
142411ca 4035 contents + roff - 3);
4a4c5f25
L		 4036 else if (!ABI_64_P (output_bfd) && val == 0x44)
4037 bfd_put_8 (output_bfd, 0x41,
4038 contents + roff - 3);
bffbf940 4039 bfd_put_8 (output_bfd, 0xc7,
142411ca 4040 contents + roff - 2);
bffbf940 4041 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4042 contents + roff - 1);
bffbf940
JJ		 4043 }
4044 else if (reg == 4)
4045 {
4046 /* addq -> addq - addressing with %rsp/%r12 is
4047 special */
4048 if (val == 0x4c)
4049 bfd_put_8 (output_bfd, 0x49,
142411ca 4050 contents + roff - 3);
4a4c5f25
L		 4051 else if (!ABI_64_P (output_bfd) && val == 0x44)
4052 bfd_put_8 (output_bfd, 0x41,
4053 contents + roff - 3);
bffbf940 4054 bfd_put_8 (output_bfd, 0x81,
142411ca 4055 contents + roff - 2);
bffbf940 4056 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4057 contents + roff - 1);
bffbf940
JJ		 4058 }
4059 else
4060 {
4061 /* addq -> leaq */
4062 if (val == 0x4c)
4063 bfd_put_8 (output_bfd, 0x4d,
142411ca 4064 contents + roff - 3);
4a4c5f25
L		 4065 else if (!ABI_64_P (output_bfd) && val == 0x44)
4066 bfd_put_8 (output_bfd, 0x45,
4067 contents + roff - 3);
bffbf940 4068 bfd_put_8 (output_bfd, 0x8d,
142411ca 4069 contents + roff - 2);
bffbf940 4070 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
142411ca 4071 contents + roff - 1);
bffbf940 4072 }
eb4ff4d6 4073 bfd_put_32 (output_bfd,
351f65ca 4074 elf_x86_64_tpoff (info, relocation),
142411ca 4075 contents + roff);
bffbf940
JJ		 4076 continue;
4077 }
142411ca
L		 4078 else
4079 BFD_ASSERT (FALSE);
bffbf940
JJ		 4080 }
4081
6de2ae4a 4082 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4083 abort ();
4084
4085 if (h != NULL)
67a4f2b7
AO		 4086 {
4087 off = h->got.offset;
351f65ca 4088 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
67a4f2b7 4089 }
bffbf940
JJ		 4090 else
4091 {
4092 if (local_got_offsets == NULL)
4093 abort ();
4094
4095 off = local_got_offsets[r_symndx];
67a4f2b7 4096 offplt = local_tlsdesc_gotents[r_symndx];
bffbf940
JJ		 4097 }
4098
4099 if ((off & 1) != 0)
4100 off &= ~1;
26e41594 4101 else
bffbf940
JJ		 4102 {
4103 Elf_Internal_Rela outrel;
bffbf940 4104 int dr_type, indx;
67a4f2b7 4105 asection *sreloc;
bffbf940 4106
6de2ae4a 4107 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4108 abort ();
4109
67a4f2b7
AO		 4110 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4111
4112 if (GOT_TLS_GDESC_P (tls_type))
4113 {
351f65ca 4114 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
67a4f2b7 4115 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
6de2ae4a
L		 4116 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4117 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4118 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4119 + offplt
4120 + htab->sgotplt_jump_table_size);
6de2ae4a 4121 sreloc = htab->elf.srelplt;
67a4f2b7 4122 if (indx == 0)
351f65ca 4123 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
67a4f2b7
AO		 4124 else
4125 outrel.r_addend = 0;
351f65ca 4126 elf_append_rela (output_bfd, sreloc, &outrel);
67a4f2b7
AO		 4127 }
4128
6de2ae4a 4129 sreloc = htab->elf.srelgot;
67a4f2b7 4130
6de2ae4a
L		 4131 outrel.r_offset = (htab->elf.sgot->output_section->vma
4132 + htab->elf.sgot->output_offset + off);
bffbf940 4133
67a4f2b7 4134 if (GOT_TLS_GD_P (tls_type))
bffbf940 4135 dr_type = R_X86_64_DTPMOD64;
67a4f2b7
AO		 4136 else if (GOT_TLS_GDESC_P (tls_type))
4137 goto dr_done;
bffbf940
JJ		 4138 else
4139 dr_type = R_X86_64_TPOFF64;
4140
6de2ae4a 4141 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
bffbf940 4142 outrel.r_addend = 0;
67a4f2b7
AO		 4143 if ((dr_type == R_X86_64_TPOFF64
4144 || dr_type == R_X86_64_TLSDESC) && indx == 0)
351f65ca
L		 4145 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4146 outrel.r_info = htab->r_info (indx, dr_type);
bffbf940 4147
351f65ca 4148 elf_append_rela (output_bfd, sreloc, &outrel);
bffbf940 4149
67a4f2b7 4150 if (GOT_TLS_GD_P (tls_type))
bffbf940
JJ		 4151 {
4152 if (indx == 0)
4153 {
d40d037c 4154 BFD_ASSERT (! unresolved_reloc);
bffbf940 4155 bfd_put_64 (output_bfd,
351f65ca 4156 relocation - elf_x86_64_dtpoff_base (info),
6de2ae4a 4157 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
bffbf940
JJ		 4158 }
4159 else
4160 {
4161 bfd_put_64 (output_bfd, 0,
6de2ae4a 4162 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4163 outrel.r_info = htab->r_info (indx,
bffbf940
JJ		 4164 R_X86_64_DTPOFF64);
4165 outrel.r_offset += GOT_ENTRY_SIZE;
351f65ca 4166 elf_append_rela (output_bfd, sreloc,
464d3bd4 4167 &outrel);
bffbf940
JJ		 4168 }
4169 }
4170
67a4f2b7 4171 dr_done:
bffbf940
JJ		 4172 if (h != NULL)
4173 h->got.offset |= 1;
4174 else
4175 local_got_offsets[r_symndx] |= 1;
4176 }
4177
67a4f2b7
AO		 4178 if (off >= (bfd_vma) -2
4179 && ! GOT_TLS_GDESC_P (tls_type))
bffbf940 4180 abort ();
351f65ca 4181 if (r_type == ELF32_R_TYPE (rel->r_info))
bffbf940 4182 {
67a4f2b7
AO		 4183 if (r_type == R_X86_64_GOTPC32_TLSDESC
4184 || r_type == R_X86_64_TLSDESC_CALL)
6de2ae4a
L		 4185 relocation = htab->elf.sgotplt->output_section->vma
4186 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4187 + offplt + htab->sgotplt_jump_table_size;
4188 else
6de2ae4a
L		 4189 relocation = htab->elf.sgot->output_section->vma
4190 + htab->elf.sgot->output_offset + off;
b34976b6 4191 unresolved_reloc = FALSE;
bffbf940 4192 }
142411ca 4193 else
67a4f2b7 4194 {
142411ca 4195 bfd_vma roff = rel->r_offset;
67a4f2b7 4196
351f65ca 4197 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
142411ca 4198 {
52bc799a 4199 /* GD->IE transition. For 64bit, change
142411ca
L		 4200 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4201 .word 0x6666; rex64; call __tls_get_addr@plt
52bc799a 4202 into:
142411ca 4203 movq %fs:0, %rax
52bc799a
L		 4204 addq foo@gottpoff(%rip), %rax
4205 For 32bit, change
4206 leaq foo@tlsgd(%rip), %rdi
4207 .word 0x6666; rex64; call __tls_get_addr@plt
4208 into:
4209 movl %fs:0, %eax
142411ca 4210 addq foo@gottpoff(%rip), %rax */
52bc799a
L		 4211 if (ABI_64_P (output_bfd))
4212 memcpy (contents + roff - 4,
4213 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4214 16);
4215 else
4216 memcpy (contents + roff - 3,
4217 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4218 15);
142411ca 4219
6de2ae4a
L		 4220 relocation = (htab->elf.sgot->output_section->vma
4221 + htab->elf.sgot->output_offset + off
142411ca
L		 4222 - roff
4223 - input_section->output_section->vma
4224 - input_section->output_offset
4225 - 12);
4226 bfd_put_32 (output_bfd, relocation,
4227 contents + roff + 8);
4228 /* Skip R_X86_64_PLT32. */
4229 rel++;
4230 continue;
4231 }
351f65ca 4232 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
142411ca
L		 4233 {
4234 /* GDesc -> IE transition.
4235 It's originally something like:
4236 leaq x@tlsdesc(%rip), %rax
67a4f2b7 4237
142411ca 4238 Change it to:
c9736ba0 4239 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
67a4f2b7 4240
142411ca
L		 4241 /* Now modify the instruction as appropriate. To
4242 turn a leaq into a movq in the form we use it, it
4243 suffices to change the second byte from 0x8d to
4244 0x8b. */
4245 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4246
4247 bfd_put_32 (output_bfd,
6de2ae4a
L		 4248 htab->elf.sgot->output_section->vma
4249 + htab->elf.sgot->output_offset + off
142411ca
L		 4250 - rel->r_offset
4251 - input_section->output_section->vma
4252 - input_section->output_offset
4253 - 4,
4254 contents + roff);
4255 continue;
4256 }
351f65ca 4257 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
142411ca
L		 4258 {
4259 /* GDesc -> IE transition.
4260 It's originally:
4261 call *(%rax)
4262
4263 Change it to:
c9736ba0 4264 xchg %ax, %ax. */
142411ca 4265
142411ca
L		 4266 bfd_put_8 (output_bfd, 0x66, contents + roff);
4267 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4268 continue;
4269 }
4270 else
4271 BFD_ASSERT (FALSE);
67a4f2b7 4272 }
bffbf940
JJ		 4273 break;
4274
4275 case R_X86_64_TLSLD:
351f65ca
L		 4276 if (! elf_x86_64_tls_transition (info, input_bfd,
4277 input_section, contents,
4278 symtab_hdr, sym_hashes,
4279 &r_type, GOT_UNKNOWN,
4280 rel, relend, h, r_symndx))
142411ca 4281 return FALSE;
a3fadc9a 4282
142411ca
L		 4283 if (r_type != R_X86_64_TLSLD)
4284 {
bffbf940 4285 /* LD->LE transition:
a3fadc9a 4286 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
52bc799a
L		 4287 For 64bit, we change it into:
4288 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4289 For 32bit, we change it into:
4290 nopl 0x0(%rax); movl %fs:0, %eax. */
142411ca
L		 4291
4292 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
52bc799a
L		 4293 if (ABI_64_P (output_bfd))
4294 memcpy (contents + rel->r_offset - 3,
4295 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4296 else
4297 memcpy (contents + rel->r_offset - 3,
4298 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
a3fadc9a 4299 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
bffbf940
JJ		 4300 rel++;
4301 continue;
4302 }
4303
6de2ae4a 4304 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4305 abort ();
4306
4307 off = htab->tls_ld_got.offset;
4308 if (off & 1)
4309 off &= ~1;
4310 else
4311 {
4312 Elf_Internal_Rela outrel;
bffbf940 4313
6de2ae4a 4314 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4315 abort ();
4316
6de2ae4a
L		 4317 outrel.r_offset = (htab->elf.sgot->output_section->vma
4318 + htab->elf.sgot->output_offset + off);
bffbf940
JJ		 4319
4320 bfd_put_64 (output_bfd, 0,
6de2ae4a 4321 htab->elf.sgot->contents + off);
bffbf940 4322 bfd_put_64 (output_bfd, 0,
6de2ae4a 4323 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4324 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
bffbf940 4325 outrel.r_addend = 0;
351f65ca 4326 elf_append_rela (output_bfd, htab->elf.srelgot,
464d3bd4 4327 &outrel);
bffbf940
JJ		 4328 htab->tls_ld_got.offset |= 1;
4329 }
6de2ae4a
L		 4330 relocation = htab->elf.sgot->output_section->vma
4331 + htab->elf.sgot->output_offset + off;
b34976b6 4332 unresolved_reloc = FALSE;
bffbf940
JJ		 4333 break;
4334
4335 case R_X86_64_DTPOFF32:
1d85728f 4336 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
351f65ca 4337 relocation -= elf_x86_64_dtpoff_base (info);
bffbf940 4338 else
351f65ca 4339 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4340 break;
4341
4342 case R_X86_64_TPOFF32:
6769d501 4343 case R_X86_64_TPOFF64:
9b769489 4344 BFD_ASSERT (info->executable);
351f65ca 4345 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4346 break;
4347
70256ad8
AJ		 4348 default:
4349 break;
4350 }
8d88c4ca 4351
239e1f3a
AM		 4352 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4353 because such sections are not SEC_ALLOC and thus ld.so will
4354 not process them. */
c434dee6 4355 if (unresolved_reloc
239e1f3a 4356 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4357 && h->def_dynamic)
4358 && _bfd_elf_section_offset (output_bfd, info, input_section,
4359 rel->r_offset) != (bfd_vma) -1)
a040981f
L		 4360 {
4361 (*_bfd_error_handler)
4362 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4363 input_bfd,
4364 input_section,
4365 (long) rel->r_offset,
4366 howto->name,
4367 h->root.root.string);
4368 return FALSE;
4369 }
c434dee6 4370
cbe950e9 4371do_relocation:
8d88c4ca 4372 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ		 4373 contents, rel->r_offset,
4374 relocation, rel->r_addend);
8d88c4ca 4375
62d78908 4376check_relocation_error:
8d88c4ca 4377 if (r != bfd_reloc_ok)
8da6118f 4378 {
c434dee6
AJ		 4379 const char *name;
4380
4381 if (h != NULL)
4382 name = h->root.root.string;
4383 else
8da6118f 4384 {
c434dee6
AJ		 4385 name = bfd_elf_string_from_elf_section (input_bfd,
4386 symtab_hdr->sh_link,
4387 sym->st_name);
4388 if (name == NULL)
b34976b6 4389 return FALSE;
c434dee6
AJ		 4390 if (*name == '\0')
4391 name = bfd_section_name (input_bfd, sec);
4392 }
4393
4394 if (r == bfd_reloc_overflow)
4395 {
c434dee6 4396 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 4397 (info, (h ? &h->root : NULL), name, howto->name,
4398 (bfd_vma) 0, input_bfd, input_section,
4399 rel->r_offset)))
b34976b6 4400 return FALSE;
c434dee6
AJ		 4401 }
4402 else
4403 {
4404 (*_bfd_error_handler)
bb95161d 4405 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
d003868e 4406 input_bfd, input_section,
c434dee6 4407 (long) rel->r_offset, name, (int) r);
b34976b6 4408 return FALSE;
8da6118f
KH		 4409 }
4410 }
8d88c4ca 4411 }
70256ad8 4412
b34976b6 4413 return TRUE;
70256ad8
AJ		 4414}
4415
4416/* Finish up dynamic symbol handling. We set the contents of various
4417 dynamic sections here. */
4418
b34976b6 4419static bfd_boolean
351f65ca
L		 4420elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4421 struct bfd_link_info *info,
4422 struct elf_link_hash_entry *h,
220cf809 4423 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
70256ad8 4424{
351f65ca 4425 struct elf_x86_64_link_hash_table *htab;
eed180f8
RM		 4426 const struct elf_x86_64_backend_data *const abed
4427 = get_elf_x86_64_backend_data (output_bfd);
70256ad8 4428
351f65ca 4429 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 4430 if (htab == NULL)
4431 return FALSE;
70256ad8
AJ		 4432
4433 if (h->plt.offset != (bfd_vma) -1)
4434 {
70256ad8
AJ		 4435 bfd_vma plt_index;
4436 bfd_vma got_offset;
4437 Elf_Internal_Rela rela;
947216bf 4438 bfd_byte *loc;
cbe950e9 4439 asection *plt, *gotplt, *relplt;
351f65ca 4440 const struct elf_backend_data *bed;
cbe950e9
L		 4441
4442 /* When building a static executable, use .iplt, .igot.plt and
4443 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 4444 if (htab->elf.splt != NULL)
cbe950e9 4445 {
6de2ae4a
L		 4446 plt = htab->elf.splt;
4447 gotplt = htab->elf.sgotplt;
4448 relplt = htab->elf.srelplt;
cbe950e9
L		 4449 }
4450 else
4451 {
6de2ae4a
L		 4452 plt = htab->elf.iplt;
4453 gotplt = htab->elf.igotplt;
4454 relplt = htab->elf.irelplt;
cbe950e9 4455 }
70256ad8
AJ		 4456
4457 /* This symbol has an entry in the procedure linkage table. Set
407443a3 4458 it up. */
cbe950e9
L		 4459 if ((h->dynindx == -1
4460 && !((h->forced_local || info->executable)
4461 && h->def_regular
4462 && h->type == STT_GNU_IFUNC))
4463 || plt == NULL
4464 || gotplt == NULL
4465 || relplt == NULL)
f6df62c8 4466 return FALSE;
70256ad8
AJ		 4467
4468 /* Get the index in the procedure linkage table which
4469 corresponds to this symbol. This is the index of this symbol
4470 in all the symbols for which we are making plt entries. The
cbe950e9 4471 first entry in the procedure linkage table is reserved.
6bbec505 4472
cbe950e9 4473 Get the offset into the .got table of the entry that
407443a3 4474 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
cbe950e9
L		 4475 bytes. The first three are reserved for the dynamic linker.
4476
4477 For static executables, we don't reserve anything. */
4478
6de2ae4a 4479 if (plt == htab->elf.splt)
cbe950e9 4480 {
eed180f8 4481 got_offset = h->plt.offset / abed->plt_entry_size - 1;
e1f98742 4482 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
cbe950e9
L		 4483 }
4484 else
4485 {
eed180f8 4486 got_offset = h->plt.offset / abed->plt_entry_size;
e1f98742 4487 got_offset = got_offset * GOT_ENTRY_SIZE;
cbe950e9 4488 }
70256ad8
AJ		 4489
4490 /* Fill in the entry in the procedure linkage table. */
eed180f8
RM		 4491 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
4492 abed->plt_entry_size);
4493
4494 /* Insert the relocation positions of the plt section. */
4495
4496 /* Put offset the PC-relative instruction referring to the GOT entry,
4497 subtracting the size of that instruction. */
653165cc 4498 bfd_put_32 (output_bfd,
eed180f8
RM		 4499 (gotplt->output_section->vma
4500 + gotplt->output_offset
4501 + got_offset
4502 - plt->output_section->vma
4503 - plt->output_offset
4504 - h->plt.offset
4505 - abed->plt_got_insn_size),
4506 plt->contents + h->plt.offset + abed->plt_got_offset);
cbe950e9 4507
653165cc 4508 /* Fill in the entry in the global offset table, initially this
eed180f8 4509 points to the second part of the PLT entry. */
cbe950e9
L		 4510 bfd_put_64 (output_bfd, (plt->output_section->vma
4511 + plt->output_offset
eed180f8 4512 + h->plt.offset + abed->plt_lazy_offset),
cbe950e9 4513 gotplt->contents + got_offset);
70256ad8
AJ		 4514
4515 /* Fill in the entry in the .rela.plt section. */
cbe950e9
L		 4516 rela.r_offset = (gotplt->output_section->vma
4517 + gotplt->output_offset
70256ad8 4518 + got_offset);
cbe950e9
L		 4519 if (h->dynindx == -1
4520 || ((info->executable
4521 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4522 && h->def_regular
4523 && h->type == STT_GNU_IFUNC))
4524 {
4525 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4526 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
351f65ca 4527 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
cbe950e9
L		 4528 rela.r_addend = (h->root.u.def.value
4529 + h->root.u.def.section->output_section->vma
4530 + h->root.u.def.section->output_offset);
e1f98742
L		 4531 /* R_X86_64_IRELATIVE comes last. */
4532 plt_index = htab->next_irelative_index--;
cbe950e9
L		 4533 }
4534 else
4535 {
351f65ca 4536 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
cbe950e9 4537 rela.r_addend = 0;
e1f98742
L		 4538 plt_index = htab->next_jump_slot_index++;
4539 }
4540
4541 /* Don't fill PLT entry for static executables. */
4542 if (plt == htab->elf.splt)
4543 {
4544 /* Put relocation index. */
4545 bfd_put_32 (output_bfd, plt_index,
eed180f8 4546 plt->contents + h->plt.offset + abed->plt_reloc_offset);
e1f98742 4547 /* Put offset for jmp .PLT0. */
eed180f8
RM		 4548 bfd_put_32 (output_bfd, - (h->plt.offset + abed->plt_plt_insn_end),
4549 plt->contents + h->plt.offset + abed->plt_plt_offset);
cbe950e9 4550 }
351f65ca
L		 4551
4552 bed = get_elf_backend_data (output_bfd);
4553 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
82e96e07 4554 bed->s->swap_reloca_out (output_bfd, &rela, loc);
70256ad8 4555
f5385ebf 4556 if (!h->def_regular)
70256ad8
AJ		 4557 {
4558 /* Mark the symbol as undefined, rather than as defined in
47a9f7b3
JJ		 4559 the .plt section. Leave the value if there were any
4560 relocations where pointer equality matters (this is a clue
c434dee6
AJ		 4561 for the dynamic linker, to make function pointer
4562 comparisons work between an application and shared
47a9f7b3
JJ		 4563 library), otherwise set it to zero. If a function is only
4564 called from a binary, there is no need to slow down
4565 shared libraries because of that. */
70256ad8 4566 sym->st_shndx = SHN_UNDEF;
f5385ebf 4567 if (!h->pointer_equality_needed)
47a9f7b3 4568 sym->st_value = 0;
70256ad8
AJ		 4569 }
4570 }
4571
bffbf940 4572 if (h->got.offset != (bfd_vma) -1
351f65ca
L		 4573 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
4574 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 4575 {
053579d7
AJ		 4576 Elf_Internal_Rela rela;
4577
4578 /* This symbol has an entry in the global offset table. Set it
bffbf940 4579 up. */
6de2ae4a 4580 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
c434dee6 4581 abort ();
053579d7 4582
6de2ae4a
L		 4583 rela.r_offset = (htab->elf.sgot->output_section->vma
4584 + htab->elf.sgot->output_offset
dc810e39 4585 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ		 4586
4587 /* If this is a static link, or it is a -Bsymbolic link and the
4588 symbol is defined locally or was forced to be local because
4589 of a version file, we just want to emit a RELATIVE reloc.
4590 The entry in the global offset table will already have been
4591 initialized in the relocate_section function. */
710ab287 4592 if (h->def_regular
0018b0a3
L		 4593 && h->type == STT_GNU_IFUNC)
4594 {
710ab287
L		 4595 if (info->shared)
4596 {
4597 /* Generate R_X86_64_GLOB_DAT. */
4598 goto do_glob_dat;
4599 }
4600 else
4601 {
90d60710
L		 4602 asection *plt;
4603
710ab287
L		 4604 if (!h->pointer_equality_needed)
4605 abort ();
4606
4607 /* For non-shared object, we can't use .got.plt, which
4608 contains the real function addres if we need pointer
4609 equality. We load the GOT entry with the PLT entry. */
90d60710 4610 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L		 4611 bfd_put_64 (output_bfd, (plt->output_section->vma
4612 + plt->output_offset
4613 + h->plt.offset),
6de2ae4a 4614 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 4615 return TRUE;
4616 }
0018b0a3
L		 4617 }
4618 else if (info->shared
4619 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 4620 {
41bed6dd
L		 4621 if (!h->def_regular)
4622 return FALSE;
cc78d0af 4623 BFD_ASSERT((h->got.offset & 1) != 0);
351f65ca 4624 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
053579d7
AJ		 4625 rela.r_addend = (h->root.u.def.value
4626 + h->root.u.def.section->output_section->vma
4627 + h->root.u.def.section->output_offset);
4628 }
4629 else
4630 {
4631 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 4632do_glob_dat:
c434dee6 4633 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 4634 htab->elf.sgot->contents + h->got.offset);
351f65ca 4635 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
053579d7
AJ		 4636 rela.r_addend = 0;
4637 }
4638
351f65ca 4639 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
053579d7
AJ		 4640 }
4641
f5385ebf 4642 if (h->needs_copy)
70256ad8 4643 {
70256ad8
AJ		 4644 Elf_Internal_Rela rela;
4645
4646 /* This symbol needs a copy reloc. Set it up. */
4647
c434dee6
AJ		 4648 if (h->dynindx == -1
4649 || (h->root.type != bfd_link_hash_defined
4650 && h->root.type != bfd_link_hash_defweak)
4651 || htab->srelbss == NULL)
4652 abort ();
70256ad8
AJ		 4653
4654 rela.r_offset = (h->root.u.def.value
4655 + h->root.u.def.section->output_section->vma
4656 + h->root.u.def.section->output_offset);
351f65ca 4657 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
70256ad8 4658 rela.r_addend = 0;
351f65ca 4659 elf_append_rela (output_bfd, htab->srelbss, &rela);
70256ad8
AJ		 4660 }
4661
b34976b6 4662 return TRUE;
70256ad8
AJ		 4663}
4664
c25bc9fc
L		 4665/* Finish up local dynamic symbol handling. We set the contents of
4666 various dynamic sections here. */
4667
4668static bfd_boolean
351f65ca 4669elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
c25bc9fc
L		 4670{
4671 struct elf_link_hash_entry *h
4672 = (struct elf_link_hash_entry *) *slot;
4673 struct bfd_link_info *info
eed180f8 4674 = (struct bfd_link_info *) inf;
c25bc9fc 4675
351f65ca 4676 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
c25bc9fc
L		 4677 info, h, NULL);
4678}
4679
c434dee6
AJ		 4680/* Used to decide how to sort relocs in an optimal manner for the
4681 dynamic linker, before writing them out. */
4682
4683static enum elf_reloc_type_class
351f65ca 4684elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
c434dee6 4685{
351f65ca 4686 switch ((int) ELF32_R_TYPE (rela->r_info))
c434dee6
AJ		 4687 {
4688 case R_X86_64_RELATIVE:
1da80baa 4689 case R_X86_64_RELATIVE64:
c434dee6
AJ		 4690 return reloc_class_relative;
4691 case R_X86_64_JUMP_SLOT:
4692 return reloc_class_plt;
4693 case R_X86_64_COPY:
4694 return reloc_class_copy;
4695 default:
4696 return reloc_class_normal;
4697 }
4698}
4699
70256ad8
AJ		 4700/* Finish up the dynamic sections. */
4701
b34976b6 4702static bfd_boolean
351f65ca
L		 4703elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
4704 struct bfd_link_info *info)
70256ad8 4705{
351f65ca 4706 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 4707 bfd *dynobj;
4708 asection *sdyn;
eed180f8
RM		 4709 const struct elf_x86_64_backend_data *const abed
4710 = get_elf_x86_64_backend_data (output_bfd);
70256ad8 4711
351f65ca 4712 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 4713 if (htab == NULL)
4714 return FALSE;
4715
c434dee6 4716 dynobj = htab->elf.dynobj;
3d4d4302 4717 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
70256ad8 4718
c434dee6 4719 if (htab->elf.dynamic_sections_created)
70256ad8 4720 {
82e96e07
L		 4721 bfd_byte *dyncon, *dynconend;
4722 const struct elf_backend_data *bed;
4723 bfd_size_type sizeof_dyn;
70256ad8 4724
6de2ae4a 4725 if (sdyn == NULL || htab->elf.sgot == NULL)
c434dee6 4726 abort ();
70256ad8 4727
82e96e07
L		 4728 bed = get_elf_backend_data (dynobj);
4729 sizeof_dyn = bed->s->sizeof_dyn;
4730 dyncon = sdyn->contents;
4731 dynconend = sdyn->contents + sdyn->size;
4732 for (; dyncon < dynconend; dyncon += sizeof_dyn)
70256ad8
AJ		 4733 {
4734 Elf_Internal_Dyn dyn;
70256ad8
AJ		 4735 asection *s;
4736
82e96e07 4737 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
70256ad8
AJ		 4738
4739 switch (dyn.d_tag)
4740 {
4741 default:
053579d7 4742 continue;
70256ad8
AJ		 4743
4744 case DT_PLTGOT:
6de2ae4a 4745 s = htab->elf.sgotplt;
8c37241b 4746 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
c434dee6 4747 break;
70256ad8
AJ		 4748
4749 case DT_JMPREL:
6de2ae4a 4750 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
c434dee6 4751 break;
70256ad8 4752
c434dee6 4753 case DT_PLTRELSZ:
6de2ae4a 4754 s = htab->elf.srelplt->output_section;
eea6121a 4755 dyn.d_un.d_val = s->size;
70256ad8
AJ		 4756 break;
4757
4758 case DT_RELASZ:
c434dee6
AJ		 4759 /* The procedure linkage table relocs (DT_JMPREL) should
4760 not be included in the overall relocs (DT_RELA).
4761 Therefore, we override the DT_RELASZ entry here to
4762 make it not include the JMPREL relocs. Since the
4763 linker script arranges for .rela.plt to follow all
4764 other relocation sections, we don't have to worry
4765 about changing the DT_RELA entry. */
6de2ae4a 4766 if (htab->elf.srelplt != NULL)
70256ad8 4767 {
6de2ae4a 4768 s = htab->elf.srelplt->output_section;
eea6121a 4769 dyn.d_un.d_val -= s->size;
70256ad8
AJ		 4770 }
4771 break;
67a4f2b7
AO		 4772
4773 case DT_TLSDESC_PLT:
6de2ae4a 4774 s = htab->elf.splt;
67a4f2b7
AO		 4775 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4776 + htab->tlsdesc_plt;
4777 break;
4778
4779 case DT_TLSDESC_GOT:
6de2ae4a 4780 s = htab->elf.sgot;
67a4f2b7
AO		 4781 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4782 + htab->tlsdesc_got;
4783 break;
70256ad8 4784 }
c434dee6 4785
82e96e07 4786 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
70256ad8
AJ		 4787 }
4788
c434dee6 4789 /* Fill in the special first entry in the procedure linkage table. */
6de2ae4a 4790 if (htab->elf.splt && htab->elf.splt->size > 0)
70256ad8 4791 {
653165cc 4792 /* Fill in the first entry in the procedure linkage table. */
eed180f8
RM		 4793 memcpy (htab->elf.splt->contents,
4794 abed->plt0_entry, abed->plt_entry_size);
653165cc
AJ		 4795 /* Add offset for pushq GOT+8(%rip), since the instruction
4796 uses 6 bytes subtract this value. */
4797 bfd_put_32 (output_bfd,
6de2ae4a
L		 4798 (htab->elf.sgotplt->output_section->vma
4799 + htab->elf.sgotplt->output_offset
653165cc 4800 + 8
6de2ae4a
L		 4801 - htab->elf.splt->output_section->vma
4802 - htab->elf.splt->output_offset
653165cc 4803 - 6),
eed180f8
RM		 4804 htab->elf.splt->contents + abed->plt0_got1_offset);
4805 /* Add offset for the PC-relative instruction accessing GOT+16,
4806 subtracting the offset to the end of that instruction. */
653165cc 4807 bfd_put_32 (output_bfd,
6de2ae4a
L		 4808 (htab->elf.sgotplt->output_section->vma
4809 + htab->elf.sgotplt->output_offset
653165cc 4810 + 16
6de2ae4a
L		 4811 - htab->elf.splt->output_section->vma
4812 - htab->elf.splt->output_offset
eed180f8
RM		 4813 - abed->plt0_got2_insn_end),
4814 htab->elf.splt->contents + abed->plt0_got2_offset);
653165cc 4815
eed180f8
RM		 4816 elf_section_data (htab->elf.splt->output_section)
4817 ->this_hdr.sh_entsize = abed->plt_entry_size;
67a4f2b7
AO		 4818
4819 if (htab->tlsdesc_plt)
4820 {
4821 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 4822 htab->elf.sgot->contents + htab->tlsdesc_got);
67a4f2b7 4823
6de2ae4a 4824 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
eed180f8 4825 abed->plt0_entry, abed->plt_entry_size);
67a4f2b7
AO		 4826
4827 /* Add offset for pushq GOT+8(%rip), since the
4828 instruction uses 6 bytes subtract this value. */
4829 bfd_put_32 (output_bfd,
6de2ae4a
L		 4830 (htab->elf.sgotplt->output_section->vma
4831 + htab->elf.sgotplt->output_offset
67a4f2b7 4832 + 8
6de2ae4a
L		 4833 - htab->elf.splt->output_section->vma
4834 - htab->elf.splt->output_offset
67a4f2b7
AO		 4835 - htab->tlsdesc_plt
4836 - 6),
eed180f8
RM		 4837 htab->elf.splt->contents
4838 + htab->tlsdesc_plt + abed->plt0_got1_offset);
4839 /* Add offset for the PC-relative instruction accessing GOT+TDG,
4840 where TGD stands for htab->tlsdesc_got, subtracting the offset
4841 to the end of that instruction. */
67a4f2b7 4842 bfd_put_32 (output_bfd,
6de2ae4a
L		 4843 (htab->elf.sgot->output_section->vma
4844 + htab->elf.sgot->output_offset
67a4f2b7 4845 + htab->tlsdesc_got
6de2ae4a
L		 4846 - htab->elf.splt->output_section->vma
4847 - htab->elf.splt->output_offset
67a4f2b7 4848 - htab->tlsdesc_plt
eed180f8
RM		 4849 - abed->plt0_got2_insn_end),
4850 htab->elf.splt->contents
4851 + htab->tlsdesc_plt + abed->plt0_got2_offset);
67a4f2b7 4852 }
70256ad8 4853 }
70256ad8
AJ		 4854 }
4855
6de2ae4a 4856 if (htab->elf.sgotplt)
70256ad8 4857 {
56d4289c
L		 4858 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4859 {
4860 (*_bfd_error_handler)
4861 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4862 return FALSE;
4863 }
4864
c434dee6 4865 /* Fill in the first three entries in the global offset table. */
6de2ae4a 4866 if (htab->elf.sgotplt->size > 0)
c434dee6
AJ		 4867 {
4868 /* Set the first entry in the global offset table to the address of
4869 the dynamic section. */
4870 if (sdyn == NULL)
6de2ae4a 4871 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
c434dee6
AJ		 4872 else
4873 bfd_put_64 (output_bfd,
4874 sdyn->output_section->vma + sdyn->output_offset,
6de2ae4a 4875 htab->elf.sgotplt->contents);
c434dee6 4876 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6de2ae4a
L		 4877 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
4878 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
c434dee6 4879 }
70256ad8 4880
6de2ae4a 4881 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
c434dee6
AJ		 4882 GOT_ENTRY_SIZE;
4883 }
70256ad8 4884
e41b3a13 4885 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 4886 if (htab->plt_eh_frame != NULL
4887 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 4888 {
4889 if (htab->elf.splt != NULL
4890 && htab->elf.splt->size != 0
4891 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4892 && htab->elf.splt->output_section != NULL
4893 && htab->plt_eh_frame->output_section != NULL)
4894 {
4895 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4896 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4897 + htab->plt_eh_frame->output_offset
4898 + PLT_FDE_START_OFFSET;
4899 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4900 htab->plt_eh_frame->contents
4901 + PLT_FDE_START_OFFSET);
4902 }
dbaa2011 4903 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 4904 {
4905 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4906 htab->plt_eh_frame,
4907 htab->plt_eh_frame->contents))
4908 return FALSE;
4909 }
4910 }
4911
6de2ae4a
L		 4912 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4913 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
8c37241b
JJ		 4914 = GOT_ENTRY_SIZE;
4915
c25bc9fc
L		 4916 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4917 htab_traverse (htab->loc_hash_table,
351f65ca 4918 elf_x86_64_finish_local_dynamic_symbol,
c25bc9fc
L		 4919 info);
4920
b34976b6 4921 return TRUE;
8d88c4ca
NC		 4922}
4923
4c45e5c9
JJ		 4924/* Return address for Ith PLT stub in section PLT, for relocation REL
4925 or (bfd_vma) -1 if it should not be included. */
4926
4927static bfd_vma
351f65ca
L		 4928elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
4929 const arelent *rel ATTRIBUTE_UNUSED)
4c45e5c9 4930{
eed180f8 4931 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
4c45e5c9 4932}
8df9fc9d 4933
d2b2c203
DJ		 4934/* Handle an x86-64 specific section when reading an object file. This
4935 is called when elfcode.h finds a section with an unknown type. */
4936
4937static bfd_boolean
351f65ca 4938elf_x86_64_section_from_shdr (bfd *abfd,
6dc132d9
L		 4939 Elf_Internal_Shdr *hdr,
4940 const char *name,
4941 int shindex)
d2b2c203
DJ		 4942{
4943 if (hdr->sh_type != SHT_X86_64_UNWIND)
4944 return FALSE;
4945
6dc132d9 4946 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
d2b2c203
DJ		 4947 return FALSE;
4948
4949 return TRUE;
4950}
4951
3b22753a
L		 4952/* Hook called by the linker routine which adds symbols from an object
4953 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4954 of .bss. */
4955
4956static bfd_boolean
351f65ca
L		 4957elf_x86_64_add_symbol_hook (bfd *abfd,
4958 struct bfd_link_info *info,
4959 Elf_Internal_Sym *sym,
4960 const char **namep ATTRIBUTE_UNUSED,
4961 flagword *flagsp ATTRIBUTE_UNUSED,
4962 asection **secp,
4963 bfd_vma *valp)
3b22753a
L		 4964{
4965 asection *lcomm;
4966
4967 switch (sym->st_shndx)
4968 {
4969 case SHN_X86_64_LCOMMON:
4970 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
4971 if (lcomm == NULL)
4972 {
4973 lcomm = bfd_make_section_with_flags (abfd,
4974 "LARGE_COMMON",
4975 (SEC_ALLOC
4976 | SEC_IS_COMMON
4977 | SEC_LINKER_CREATED));
4978 if (lcomm == NULL)
4979 return FALSE;
4980 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
4981 }
4982 *secp = lcomm;
4983 *valp = sym->st_size;
c35bdf6e 4984 return TRUE;
3b22753a 4985 }
d8045f23 4986
c16153ae 4987 if ((abfd->flags & DYNAMIC) == 0
f64b2e8d
NC		 4988 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
4989 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
4990 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
d8045f23 4991
3b22753a
L		 4992 return TRUE;
4993}
4994
4995
4996/* Given a BFD section, try to locate the corresponding ELF section
4997 index. */
4998
4999static bfd_boolean
351f65ca
L		 5000elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
5001 asection *sec, int *index_return)
3b22753a
L		 5002{
5003 if (sec == &_bfd_elf_large_com_section)
5004 {
91d6fa6a 5005 *index_return = SHN_X86_64_LCOMMON;
3b22753a
L		 5006 return TRUE;
5007 }
5008 return FALSE;
5009}
5010
5011/* Process a symbol. */
5012
5013static void
351f65ca
L		 5014elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5015 asymbol *asym)
3b22753a
L		 5016{
5017 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5018
5019 switch (elfsym->internal_elf_sym.st_shndx)
5020 {
5021 case SHN_X86_64_LCOMMON:
5022 asym->section = &_bfd_elf_large_com_section;
5023 asym->value = elfsym->internal_elf_sym.st_size;
5024 /* Common symbol doesn't set BSF_GLOBAL. */
5025 asym->flags &= ~BSF_GLOBAL;
5026 break;
5027 }
5028}
5029
5030static bfd_boolean
351f65ca 5031elf_x86_64_common_definition (Elf_Internal_Sym *sym)
3b22753a
L		 5032{
5033 return (sym->st_shndx == SHN_COMMON
5034 || sym->st_shndx == SHN_X86_64_LCOMMON);
5035}
5036
5037static unsigned int
351f65ca 5038elf_x86_64_common_section_index (asection *sec)
3b22753a
L		 5039{
5040 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5041 return SHN_COMMON;
5042 else
5043 return SHN_X86_64_LCOMMON;
5044}
5045
5046static asection *
351f65ca 5047elf_x86_64_common_section (asection *sec)
3b22753a
L		 5048{
5049 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5050 return bfd_com_section_ptr;
5051 else
5052 return &_bfd_elf_large_com_section;
5053}
5054
5055static bfd_boolean
351f65ca
L		 5056elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
5057 struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED,
5058 struct elf_link_hash_entry *h,
5059 Elf_Internal_Sym *sym,
5060 asection **psec,
5061 bfd_vma *pvalue ATTRIBUTE_UNUSED,
5062 unsigned int *pold_alignment ATTRIBUTE_UNUSED,
5063 bfd_boolean *skip ATTRIBUTE_UNUSED,
5064 bfd_boolean *override ATTRIBUTE_UNUSED,
5065 bfd_boolean *type_change_ok ATTRIBUTE_UNUSED,
5066 bfd_boolean *size_change_ok ATTRIBUTE_UNUSED,
71e7aa7d
L		 5067 bfd_boolean *newdyn ATTRIBUTE_UNUSED,
5068 bfd_boolean *newdef,
351f65ca
L		 5069 bfd_boolean *newdyncommon ATTRIBUTE_UNUSED,
5070 bfd_boolean *newweak ATTRIBUTE_UNUSED,
5071 bfd *abfd ATTRIBUTE_UNUSED,
5072 asection **sec,
71e7aa7d
L		 5073 bfd_boolean *olddyn ATTRIBUTE_UNUSED,
5074 bfd_boolean *olddef,
351f65ca
L		 5075 bfd_boolean *olddyncommon ATTRIBUTE_UNUSED,
5076 bfd_boolean *oldweak ATTRIBUTE_UNUSED,
5077 bfd *oldbfd,
5078 asection **oldsec)
3b22753a
L		 5079{
5080 /* A normal common symbol and a large common symbol result in a
00492999
L		 5081 normal common symbol. We turn the large common symbol into a
5082 normal one. */
71e7aa7d 5083 if (!*olddef
3b22753a 5084 && h->root.type == bfd_link_hash_common
71e7aa7d 5085 && !*newdef
3b22753a 5086 && bfd_is_com_section (*sec)
00492999 5087 && *oldsec != *sec)
3b22753a 5088 {
00492999
L		 5089 if (sym->st_shndx == SHN_COMMON
5090 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0)
5091 {
5092 h->root.u.c.p->section
5093 = bfd_make_section_old_way (oldbfd, "COMMON");
5094 h->root.u.c.p->section->flags = SEC_ALLOC;
5095 }
5096 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5097 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0)
9a2e389a 5098 *psec = *sec = bfd_com_section_ptr;
3b22753a
L		 5099 }
5100
5101 return TRUE;
5102}
5103
5104static int
351f65ca
L		 5105elf_x86_64_additional_program_headers (bfd *abfd,
5106 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3b22753a
L		 5107{
5108 asection *s;
9a2e389a 5109 int count = 0;
3b22753a
L		 5110
5111 /* Check to see if we need a large readonly segment. */
5112 s = bfd_get_section_by_name (abfd, ".lrodata");
5113 if (s && (s->flags & SEC_LOAD))
5114 count++;
5115
5116 /* Check to see if we need a large data segment. Since .lbss sections
5117 is placed right after the .bss section, there should be no need for
5118 a large data segment just because of .lbss. */
5119 s = bfd_get_section_by_name (abfd, ".ldata");
5120 if (s && (s->flags & SEC_LOAD))
5121 count++;
5122
5123 return count;
5124}
5125
fdc90cb4
JJ		 5126/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5127
5128static bfd_boolean
351f65ca 5129elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
fdc90cb4
JJ		 5130{
5131 if (h->plt.offset != (bfd_vma) -1
5132 && !h->def_regular
5133 && !h->pointer_equality_needed)
5134 return FALSE;
5135
5136 return _bfd_elf_hash_symbol (h);
5137}
5138
c543bf9a
L		 5139/* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5140
5141static bfd_boolean
5142elf_x86_64_relocs_compatible (const bfd_target *input,
5143 const bfd_target *output)
5144{
5145 return ((xvec_get_elf_backend_data (input)->s->elfclass
5146 == xvec_get_elf_backend_data (output)->s->elfclass)
5147 && _bfd_elf_relocs_compatible (input, output));
5148}
5149
9a2e389a 5150static const struct bfd_elf_special_section
351f65ca 5151 elf_x86_64_special_sections[]=
3b22753a 5152{
0112cd26
NC		 5153 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5154 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5155 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
5156 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5157 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5158 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5159 { NULL, 0, 0, 0, 0 }
3b22753a
L		 5160};
5161
70256ad8
AJ		 5162#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
5163#define TARGET_LITTLE_NAME "elf64-x86-64"
5164#define ELF_ARCH bfd_arch_i386
ae95ffa6 5165#define ELF_TARGET_ID X86_64_ELF_DATA
70256ad8 5166#define ELF_MACHINE_CODE EM_X86_64
f7661549 5167#define ELF_MAXPAGESIZE 0x200000
2043964e 5168#define ELF_MINPAGESIZE 0x1000
24718e3b 5169#define ELF_COMMONPAGESIZE 0x1000
70256ad8
AJ		 5170
5171#define elf_backend_can_gc_sections 1
51b64d56 5172#define elf_backend_can_refcount 1
70256ad8
AJ		 5173#define elf_backend_want_got_plt 1
5174#define elf_backend_plt_readonly 1
5175#define elf_backend_want_plt_sym 0
5176#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 5177#define elf_backend_rela_normal 1
e41b3a13 5178#define elf_backend_plt_alignment 4
70256ad8 5179
351f65ca 5180#define elf_info_to_howto elf_x86_64_info_to_howto
70256ad8 5181
70256ad8 5182#define bfd_elf64_bfd_link_hash_table_create \
351f65ca 5183 elf_x86_64_link_hash_table_create
c25bc9fc 5184#define bfd_elf64_bfd_link_hash_table_free \
351f65ca
L		 5185 elf_x86_64_link_hash_table_free
5186#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
157090f7 5187#define bfd_elf64_bfd_reloc_name_lookup \
351f65ca 5188 elf_x86_64_reloc_name_lookup
70256ad8 5189
351f65ca 5190#define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
c543bf9a 5191#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
351f65ca
L		 5192#define elf_backend_check_relocs elf_x86_64_check_relocs
5193#define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5194#define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5195#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5196#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5197#define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5198#define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5199#define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5200#define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
8fd79e71
L		 5201#ifdef CORE_HEADER
5202#define elf_backend_write_core_note elf_x86_64_write_core_note
5203#endif
351f65ca
L		 5204#define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5205#define elf_backend_relocate_section elf_x86_64_relocate_section
5206#define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5207#define elf_backend_always_size_sections elf_x86_64_always_size_sections
74541ad4 5208#define elf_backend_init_index_section _bfd_elf_init_1_index_section
351f65ca 5209#define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
407443a3 5210#define elf_backend_object_p elf64_x86_64_elf_object_p
351f65ca 5211#define bfd_elf64_mkobject elf_x86_64_mkobject
8d88c4ca 5212
d2b2c203 5213#define elf_backend_section_from_shdr \
351f65ca 5214 elf_x86_64_section_from_shdr
d2b2c203 5215
3b22753a 5216#define elf_backend_section_from_bfd_section \
351f65ca 5217 elf_x86_64_elf_section_from_bfd_section
3b22753a 5218#define elf_backend_add_symbol_hook \
351f65ca 5219 elf_x86_64_add_symbol_hook
3b22753a 5220#define elf_backend_symbol_processing \
351f65ca 5221 elf_x86_64_symbol_processing
3b22753a 5222#define elf_backend_common_section_index \
351f65ca 5223 elf_x86_64_common_section_index
3b22753a 5224#define elf_backend_common_section \
351f65ca 5225 elf_x86_64_common_section
3b22753a 5226#define elf_backend_common_definition \
351f65ca 5227 elf_x86_64_common_definition
3b22753a 5228#define elf_backend_merge_symbol \
351f65ca 5229 elf_x86_64_merge_symbol
3b22753a 5230#define elf_backend_special_sections \
351f65ca 5231 elf_x86_64_special_sections
3b22753a 5232#define elf_backend_additional_program_headers \
351f65ca 5233 elf_x86_64_additional_program_headers
fdc90cb4 5234#define elf_backend_hash_symbol \
351f65ca 5235 elf_x86_64_hash_symbol
3b22753a 5236
d8045f23
NC		 5237#define elf_backend_post_process_headers _bfd_elf_set_osabi
5238
8d88c4ca 5239#include "elf64-target.h"
9d7cbccd
NC		 5240
5241/* FreeBSD support. */
5242
5243#undef TARGET_LITTLE_SYM
5244#define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
5245#undef TARGET_LITTLE_NAME
5246#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5247
d1036acb
L		 5248#undef ELF_OSABI
5249#define ELF_OSABI ELFOSABI_FREEBSD
9d7cbccd 5250
9d7cbccd
NC		 5251#undef elf64_bed
5252#define elf64_bed elf64_x86_64_fbsd_bed
5253
5254#include "elf64-target.h"
8a9036a4 5255
a6cc6b3b
RO		 5256/* Solaris 2 support. */
5257
5258#undef TARGET_LITTLE_SYM
5259#define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
5260#undef TARGET_LITTLE_NAME
5261#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5262
5263/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5264 objects won't be recognized. */
5265#undef ELF_OSABI
5266
5267#undef elf64_bed
5268#define elf64_bed elf64_x86_64_sol2_bed
5269
7dc98aea
RO		 5270/* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5271 boundary. */
5272#undef elf_backend_static_tls_alignment
5273#define elf_backend_static_tls_alignment 16
5274
a6cc6b3b
RO		 5275/* The Solaris 2 ABI requires a plt symbol on all platforms.
5276
5277 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5278 File, p.63. */
5279#undef elf_backend_want_plt_sym
5280#define elf_backend_want_plt_sym 1
5281
5282#include "elf64-target.h"
5283
8059fb19
RM		 5284/* Native Client support. */
5285
5286#undef TARGET_LITTLE_SYM
5287#define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
5288#undef TARGET_LITTLE_NAME
5289#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5290#undef elf64_bed
5291#define elf64_bed elf64_x86_64_nacl_bed
5292
5293#undef ELF_MAXPAGESIZE
5294#undef ELF_MINPAGESIZE
5295#undef ELF_COMMONPAGESIZE
5296#define ELF_MAXPAGESIZE 0x10000
5297#define ELF_MINPAGESIZE 0x10000
5298#define ELF_COMMONPAGESIZE 0x10000
5299
5300/* Restore defaults. */
5301#undef ELF_OSABI
5302#undef elf_backend_static_tls_alignment
5303#undef elf_backend_want_plt_sym
5304#define elf_backend_want_plt_sym 0
5305
5306/* NaCl uses substantially different PLT entries for the same effects. */
5307
5308#undef elf_backend_plt_alignment
5309#define elf_backend_plt_alignment 5
5310#define NACL_PLT_ENTRY_SIZE 64
5311#define NACLMASK 0xe0 /* 32-byte alignment mask. */
5312
5313static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
5314 {
5315 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5316 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5317 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5318 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5319 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5320
ea2d813e
RM		 5321 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5322 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */
5323
5324 /* 32 bytes of nop to pad out to the standard size. */
8059fb19
RM		 5325 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5326 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5327 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5328 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
ea2d813e
RM		 5329 0x66, /* excess data32 prefix */
5330 0x90 /* nop */
8059fb19
RM		 5331 };
5332
5333static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5334 {
5335 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5336 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5337 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5338 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5339
5340 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5341 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5342 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5343
5344 /* Lazy GOT entries point here (32-byte aligned). */
5345 0x68, /* pushq immediate */
5346 0, 0, 0, 0, /* replaced with index into relocation table. */
5347 0xe9, /* jmp relative */
5348 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5349
5350 /* 22 bytes of nop to pad out to the standard size. */
5351 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5352 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5353 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5354 };
5355
5356/* .eh_frame covering the .plt section. */
5357
5358static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
5359 {
5360#if (PLT_CIE_LENGTH != 20 \
5361 || PLT_FDE_LENGTH != 36 \
5362 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5363 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5364# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5365#endif
5366 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5367 0, 0, 0, 0, /* CIE ID */
5368 1, /* CIE version */
5369 'z', 'R', 0, /* Augmentation string */
5370 1, /* Code alignment factor */
5371 0x78, /* Data alignment factor */
5372 16, /* Return address column */
5373 1, /* Augmentation size */
5374 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5375 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5376 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5377 DW_CFA_nop, DW_CFA_nop,
5378
5379 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5380 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
5381 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5382 0, 0, 0, 0, /* .plt size goes here */
5383 0, /* Augmentation size */
5384 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
5385 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5386 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
5387 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5388 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5389 13, /* Block length */
5390 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
5391 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
5392 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5393 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
5394 DW_CFA_nop, DW_CFA_nop
5395 };
5396
5397static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
5398 {
5399 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
5400 elf_x86_64_nacl_plt_entry, /* plt_entry */
5401 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5402 2, /* plt0_got1_offset */
5403 9, /* plt0_got2_offset */
5404 13, /* plt0_got2_insn_end */
5405 3, /* plt_got_offset */
5406 33, /* plt_reloc_offset */
5407 38, /* plt_plt_offset */
5408 7, /* plt_got_insn_size */
5409 42, /* plt_plt_insn_end */
5410 32, /* plt_lazy_offset */
5411 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
5412 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
5413 };
5414
5415#undef elf_backend_arch_data
5416#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5417
5a68afcf
RM		 5418#undef elf_backend_modify_segment_map
5419#define elf_backend_modify_segment_map nacl_modify_segment_map
5420#undef elf_backend_modify_program_headers
5421#define elf_backend_modify_program_headers nacl_modify_program_headers
5422
8059fb19
RM		 5423#include "elf64-target.h"
5424
5425/* Native Client x32 support. */
5426
5427#undef TARGET_LITTLE_SYM
5428#define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
5429#undef TARGET_LITTLE_NAME
5430#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5431#undef elf32_bed
5432#define elf32_bed elf32_x86_64_nacl_bed
5433
5434#define bfd_elf32_bfd_link_hash_table_create \
5435 elf_x86_64_link_hash_table_create
5436#define bfd_elf32_bfd_link_hash_table_free \
5437 elf_x86_64_link_hash_table_free
5438#define bfd_elf32_bfd_reloc_type_lookup \
5439 elf_x86_64_reloc_type_lookup
5440#define bfd_elf32_bfd_reloc_name_lookup \
5441 elf_x86_64_reloc_name_lookup
5442#define bfd_elf32_mkobject \
5443 elf_x86_64_mkobject
5444
5445#undef elf_backend_object_p
5446#define elf_backend_object_p \
5447 elf32_x86_64_elf_object_p
5448
5449#undef elf_backend_bfd_from_remote_memory
5450#define elf_backend_bfd_from_remote_memory \
5451 _bfd_elf32_bfd_from_remote_memory
5452
5453#undef elf_backend_size_info
5454#define elf_backend_size_info \
5455 _bfd_elf32_size_info
5456
5457#include "elf32-target.h"
5458
5459/* Restore defaults. */
5a68afcf 5460#undef elf_backend_object_p
8059fb19 5461#define elf_backend_object_p elf64_x86_64_elf_object_p
5a68afcf
RM		 5462#undef elf_backend_bfd_from_remote_memory
5463#undef elf_backend_size_info
5464#undef elf_backend_modify_segment_map
5465#undef elf_backend_modify_program_headers
8059fb19 5466
8a9036a4
L		 5467/* Intel L1OM support. */
5468
5469static bfd_boolean
5470elf64_l1om_elf_object_p (bfd *abfd)
5471{
5472 /* Set the right machine number for an L1OM elf64 file. */
5473 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5474 return TRUE;
5475}
5476
5477#undef TARGET_LITTLE_SYM
5478#define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5479#undef TARGET_LITTLE_NAME
5480#define TARGET_LITTLE_NAME "elf64-l1om"
5481#undef ELF_ARCH
5482#define ELF_ARCH bfd_arch_l1om
5483
5484#undef ELF_MACHINE_CODE
5485#define ELF_MACHINE_CODE EM_L1OM
5486
5487#undef ELF_OSABI
5488
5489#undef elf64_bed
5490#define elf64_bed elf64_l1om_bed
5491
5492#undef elf_backend_object_p
5493#define elf_backend_object_p elf64_l1om_elf_object_p
5494
8059fb19
RM		 5495/* Restore defaults. */
5496#undef ELF_MAXPAGESIZE
5497#undef ELF_MINPAGESIZE
5498#undef ELF_COMMONPAGESIZE
5499#define ELF_MAXPAGESIZE 0x200000
5500#define ELF_MINPAGESIZE 0x1000
5501#define ELF_COMMONPAGESIZE 0x1000
5502#undef elf_backend_plt_alignment
5503#define elf_backend_plt_alignment 4
5504#undef elf_backend_arch_data
5505#define elf_backend_arch_data &elf_x86_64_arch_bed
1a0c107f 5506
8a9036a4
L		 5507#include "elf64-target.h"
5508
5509/* FreeBSD L1OM support. */
5510
5511#undef TARGET_LITTLE_SYM
5512#define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5513#undef TARGET_LITTLE_NAME
5514#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5515
5516#undef ELF_OSABI
5517#define ELF_OSABI ELFOSABI_FREEBSD
5518
5519#undef elf64_bed
5520#define elf64_bed elf64_l1om_fbsd_bed
5521
8a9036a4 5522#include "elf64-target.h"
351f65ca 5523
7a9068fe
L		 5524/* Intel K1OM support. */
5525
5526static bfd_boolean
5527elf64_k1om_elf_object_p (bfd *abfd)
5528{
5529 /* Set the right machine number for an K1OM elf64 file. */
5530 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
5531 return TRUE;
5532}
5533
5534#undef TARGET_LITTLE_SYM
5535#define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
5536#undef TARGET_LITTLE_NAME
5537#define TARGET_LITTLE_NAME "elf64-k1om"
5538#undef ELF_ARCH
5539#define ELF_ARCH bfd_arch_k1om
5540
5541#undef ELF_MACHINE_CODE
5542#define ELF_MACHINE_CODE EM_K1OM
5543
5544#undef ELF_OSABI
5545
5546#undef elf64_bed
5547#define elf64_bed elf64_k1om_bed
5548
5549#undef elf_backend_object_p
5550#define elf_backend_object_p elf64_k1om_elf_object_p
5551
5552#undef elf_backend_static_tls_alignment
5553
5554#undef elf_backend_want_plt_sym
5555#define elf_backend_want_plt_sym 0
5556
5557#include "elf64-target.h"
5558
5559/* FreeBSD K1OM support. */
5560
5561#undef TARGET_LITTLE_SYM
5562#define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
5563#undef TARGET_LITTLE_NAME
5564#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5565
5566#undef ELF_OSABI
5567#define ELF_OSABI ELFOSABI_FREEBSD
5568
5569#undef elf64_bed
5570#define elf64_bed elf64_k1om_fbsd_bed
5571
5572#include "elf64-target.h"
5573
351f65ca
L		 5574/* 32bit x86-64 support. */
5575
351f65ca
L		 5576#undef TARGET_LITTLE_SYM
5577#define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5578#undef TARGET_LITTLE_NAME
5579#define TARGET_LITTLE_NAME "elf32-x86-64"
8059fb19 5580#undef elf32_bed
351f65ca
L		 5581
5582#undef ELF_ARCH
5583#define ELF_ARCH bfd_arch_i386
5584
5585#undef ELF_MACHINE_CODE
5586#define ELF_MACHINE_CODE EM_X86_64
5587
351f65ca
L		 5588#undef ELF_OSABI
5589
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L		 5590#undef elf_backend_object_p
5591#define elf_backend_object_p \
5592 elf32_x86_64_elf_object_p
5593
5594#undef elf_backend_bfd_from_remote_memory
5595#define elf_backend_bfd_from_remote_memory \
5596 _bfd_elf32_bfd_from_remote_memory
5597
5598#undef elf_backend_size_info
5599#define elf_backend_size_info \
5600 _bfd_elf32_size_info
5601
5602#include "elf32-target.h"
GDB Binutils - Deliverables
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