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[deliverable/binutils-gdb.git] / bfd / elf64-x86-64.c
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351f65ca 1/* X86-64 specific support for ELF
4dfe6ac6 2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3ce231f8 3 2010, 2011, 2012
9f973f28 4 Free Software Foundation, Inc.
8d88c4ca
NC		 5 Contributed by Jan Hubicka <jh@suse.cz>.
6
ae9a127f 7 This file is part of BFD, the Binary File Descriptor library.
8d88c4ca 8
ae9a127f
NC		 9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
cd123cb7 11 the Free Software Foundation; either version 3 of the License, or
ae9a127f 12 (at your option) any later version.
8d88c4ca 13
ae9a127f
NC		 14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
8d88c4ca 18
ae9a127f
NC		 19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
cd123cb7
NC		 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
8d88c4ca 23
8d88c4ca 24#include "sysdep.h"
3db64b00 25#include "bfd.h"
c434dee6 26#include "bfdlink.h"
8d88c4ca
NC		 27#include "libbfd.h"
28#include "elf-bfd.h"
5a68afcf 29#include "elf-nacl.h"
142411ca 30#include "bfd_stdint.h"
c25bc9fc
L		 31#include "objalloc.h"
32#include "hashtab.h"
e41b3a13 33#include "dwarf2.h"
d7921315 34#include "libiberty.h"
8d88c4ca
NC		 35
36#include "elf/x86-64.h"
37
8fd79e71
L		 38#ifdef CORE_HEADER
39#include <stdarg.h>
40#include CORE_HEADER
41#endif
42
8d88c4ca
NC		 43/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
44#define MINUS_ONE (~ (bfd_vma) 0)
45
351f65ca
L		 46/* Since both 32-bit and 64-bit x86-64 encode relocation type in the
47 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
48 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
49 since they are the same. */
50
51#define ABI_64_P(abfd) \
52 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
53
8d88c4ca 54/* The relocation "howto" table. Order of fields:
7b81dfbb
AJ		 55 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
56 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
70256ad8
AJ		 57static reloc_howto_type x86_64_elf_howto_table[] =
58{
b34976b6
AM		 59 HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont,
60 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
61 FALSE),
62 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
64 FALSE),
65 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
66 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
67 TRUE),
68 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
69 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
70 FALSE),
71 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
72 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
73 TRUE),
74 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
76 FALSE),
77 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
79 MINUS_ONE, FALSE),
80 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
82 MINUS_ONE, FALSE),
83 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
85 MINUS_ONE, FALSE),
86 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
87 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
88 0xffffffff, TRUE),
89 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
90 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
91 FALSE),
92 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
93 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
94 FALSE),
95 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
b0360d8c 97 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
b34976b6 98 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
ac2aa337 99 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
b34976b6
AM		 100 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
101 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
102 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
103 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
105 MINUS_ONE, FALSE),
106 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
108 MINUS_ONE, FALSE),
109 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
111 MINUS_ONE, FALSE),
112 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
113 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
114 0xffffffff, TRUE),
115 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
116 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
117 0xffffffff, TRUE),
ac2aa337 118 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
b34976b6
AM		 119 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
120 0xffffffff, FALSE),
121 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
122 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
123 0xffffffff, TRUE),
124 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
125 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
126 0xffffffff, FALSE),
d6ab8113
JB		 127 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
129 TRUE),
130 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
132 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
133 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
134 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
135 FALSE, 0xffffffff, 0xffffffff, TRUE),
7b81dfbb
AJ		 136 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
137 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
138 FALSE),
139 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
140 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
141 MINUS_ONE, TRUE),
142 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
143 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
144 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
145 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
146 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
147 MINUS_ONE, FALSE),
148 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
149 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
150 MINUS_ONE, FALSE),
67a4f2b7
AO		 151 EMPTY_HOWTO (32),
152 EMPTY_HOWTO (33),
153 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
154 complain_overflow_bitfield, bfd_elf_generic_reloc,
155 "R_X86_64_GOTPC32_TLSDESC",
156 FALSE, 0xffffffff, 0xffffffff, TRUE),
157 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
158 complain_overflow_dont, bfd_elf_generic_reloc,
159 "R_X86_64_TLSDESC_CALL",
160 FALSE, 0, 0, FALSE),
161 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
162 complain_overflow_bitfield, bfd_elf_generic_reloc,
163 "R_X86_64_TLSDESC",
164 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
cbe950e9
L		 165 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
167 MINUS_ONE, FALSE),
64d25c44
L		 168 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
170 MINUS_ONE, FALSE),
fe4770f4 171
a33d77bc
JB		 172 /* We have a gap in the reloc numbers here.
173 R_X86_64_standard counts the number up to this point, and
174 R_X86_64_vt_offset is the value to subtract from a reloc type of
175 R_X86_64_GNU_VT* to form an index into this table. */
cbe950e9 176#define R_X86_64_standard (R_X86_64_IRELATIVE + 1)
a33d77bc
JB		 177#define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
178
fe4770f4 179/* GNU extension to record C++ vtable hierarchy. */
b34976b6
AM		 180 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
181 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
fe4770f4
AJ		 182
183/* GNU extension to record C++ vtable member usage. */
b34976b6
AM		 184 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
185 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
d7921315
L		 186 FALSE),
187
188/* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
189 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
190 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
191 FALSE)
8d88c4ca
NC		 192};
193
d8045f23
NC		 194#define IS_X86_64_PCREL_TYPE(TYPE) \
195 ( ((TYPE) == R_X86_64_PC8) \
196 || ((TYPE) == R_X86_64_PC16) \
197 || ((TYPE) == R_X86_64_PC32) \
198 || ((TYPE) == R_X86_64_PC64))
199
8d88c4ca 200/* Map BFD relocs to the x86_64 elf relocs. */
70256ad8
AJ		 201struct elf_reloc_map
202{
8d88c4ca
NC		 203 bfd_reloc_code_real_type bfd_reloc_val;
204 unsigned char elf_reloc_val;
205};
206
dc810e39 207static const struct elf_reloc_map x86_64_reloc_map[] =
8d88c4ca 208{
70256ad8
AJ		 209 { BFD_RELOC_NONE, R_X86_64_NONE, },
210 { BFD_RELOC_64, R_X86_64_64, },
211 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
212 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
213 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
214 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
215 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
216 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
217 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
218 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
219 { BFD_RELOC_32, R_X86_64_32, },
220 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
221 { BFD_RELOC_16, R_X86_64_16, },
222 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
223 { BFD_RELOC_8, R_X86_64_8, },
224 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
bffbf940
JJ		 225 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
226 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
227 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
228 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
229 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
230 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
231 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
232 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
d6ab8113
JB		 233 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
234 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
235 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
7b81dfbb
AJ		 236 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
237 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
238 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
239 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
240 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
67a4f2b7
AO		 241 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
242 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
243 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
cbe950e9 244 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
fe4770f4
AJ		 245 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
246 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
8d88c4ca
NC		 247};
248
67a4f2b7 249static reloc_howto_type *
351f65ca 250elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
67a4f2b7
AO		 251{
252 unsigned i;
253
d7921315
L		 254 if (r_type == (unsigned int) R_X86_64_32)
255 {
256 if (ABI_64_P (abfd))
257 i = r_type;
258 else
259 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
260 }
261 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
262 || r_type >= (unsigned int) R_X86_64_max)
67a4f2b7
AO		 263 {
264 if (r_type >= (unsigned int) R_X86_64_standard)
265 {
266 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
267 abfd, (int) r_type);
268 r_type = R_X86_64_NONE;
269 }
270 i = r_type;
271 }
272 else
273 i = r_type - (unsigned int) R_X86_64_vt_offset;
274 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
275 return &x86_64_elf_howto_table[i];
276}
8d88c4ca
NC		 277
278/* Given a BFD reloc type, return a HOWTO structure. */
279static reloc_howto_type *
351f65ca
L		 280elf_x86_64_reloc_type_lookup (bfd *abfd,
281 bfd_reloc_code_real_type code)
8d88c4ca
NC		 282{
283 unsigned int i;
27482721 284
8d88c4ca
NC		 285 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
286 i++)
287 {
288 if (x86_64_reloc_map[i].bfd_reloc_val == code)
351f65ca
L		 289 return elf_x86_64_rtype_to_howto (abfd,
290 x86_64_reloc_map[i].elf_reloc_val);
8d88c4ca
NC		 291 }
292 return 0;
293}
294
157090f7 295static reloc_howto_type *
d7921315 296elf_x86_64_reloc_name_lookup (bfd *abfd,
351f65ca 297 const char *r_name)
157090f7
AM		 298{
299 unsigned int i;
300
d7921315
L		 301 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
302 {
303 /* Get x32 R_X86_64_32. */
304 reloc_howto_type *reloc
305 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
306 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
307 return reloc;
308 }
309
310 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
157090f7
AM		 311 if (x86_64_elf_howto_table[i].name != NULL
312 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
313 return &x86_64_elf_howto_table[i];
314
315 return NULL;
316}
317
8d88c4ca 318/* Given an x86_64 ELF reloc type, fill in an arelent structure. */
8da6118f 319
8d88c4ca 320static void
351f65ca
L		 321elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
322 Elf_Internal_Rela *dst)
8d88c4ca 323{
67a4f2b7 324 unsigned r_type;
8d88c4ca 325
351f65ca
L		 326 r_type = ELF32_R_TYPE (dst->r_info);
327 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
8d88c4ca
NC		 328 BFD_ASSERT (r_type == cache_ptr->howto->type);
329}
70256ad8 330\f
3bab7989 331/* Support for core dump NOTE sections. */
b34976b6 332static bfd_boolean
351f65ca 333elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 334{
335 int offset;
eea6121a 336 size_t size;
3bab7989
ML		 337
338 switch (note->descsz)
339 {
340 default:
b34976b6 341 return FALSE;
3bab7989 342
bcd823f1
L		 343 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
344 /* pr_cursig */
345 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
346
347 /* pr_pid */
348 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
349
350 /* pr_reg */
351 offset = 72;
352 size = 216;
353
354 break;
355
3bab7989
ML		 356 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
357 /* pr_cursig */
cedb70c5 358 elf_tdata (abfd)->core_signal
3bab7989
ML		 359 = bfd_get_16 (abfd, note->descdata + 12);
360
361 /* pr_pid */
261b8d08 362 elf_tdata (abfd)->core_lwpid
3bab7989
ML		 363 = bfd_get_32 (abfd, note->descdata + 32);
364
365 /* pr_reg */
366 offset = 112;
eea6121a 367 size = 216;
3bab7989
ML		 368
369 break;
370 }
371
372 /* Make a ".reg/999" section. */
373 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 374 size, note->descpos + offset);
3bab7989
ML		 375}
376
b34976b6 377static bfd_boolean
351f65ca 378elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 379{
380 switch (note->descsz)
381 {
382 default:
b34976b6 383 return FALSE;
3bab7989 384
bcd823f1
L		 385 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
386 elf_tdata (abfd)->core_pid
387 = bfd_get_32 (abfd, note->descdata + 12);
388 elf_tdata (abfd)->core_program
389 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
390 elf_tdata (abfd)->core_command
391 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
392 break;
393
3bab7989 394 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
261b8d08
PA		 395 elf_tdata (abfd)->core_pid
396 = bfd_get_32 (abfd, note->descdata + 24);
3bab7989
ML		 397 elf_tdata (abfd)->core_program
398 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
399 elf_tdata (abfd)->core_command
400 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
401 }
402
403 /* Note that for some reason, a spurious space is tacked
404 onto the end of the args in some (at least one anyway)
405 implementations, so strip it off if it exists. */
406
407 {
408 char *command = elf_tdata (abfd)->core_command;
409 int n = strlen (command);
410
411 if (0 < n && command[n - 1] == ' ')
412 command[n - 1] = '\0';
413 }
414
b34976b6 415 return TRUE;
3bab7989 416}
8fd79e71
L		 417
418#ifdef CORE_HEADER
419static char *
420elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
421 int note_type, ...)
422{
423 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8fd79e71
L		 424 va_list ap;
425 const char *fname, *psargs;
426 long pid;
427 int cursig;
428 const void *gregs;
429
430 switch (note_type)
431 {
432 default:
433 return NULL;
434
435 case NT_PRPSINFO:
436 va_start (ap, note_type);
437 fname = va_arg (ap, const char *);
438 psargs = va_arg (ap, const char *);
439 va_end (ap);
440
441 if (bed->s->elfclass == ELFCLASS32)
442 {
443 prpsinfo32_t data;
444 memset (&data, 0, sizeof (data));
445 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
446 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK		 447 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
448 &data, sizeof (data));
8fd79e71
L		 449 }
450 else
451 {
b1bd052d 452 prpsinfo64_t data;
8fd79e71
L		 453 memset (&data, 0, sizeof (data));
454 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
455 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK		 456 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
457 &data, sizeof (data));
8fd79e71 458 }
e85c6a70 459 /* NOTREACHED */
8fd79e71
L		 460
461 case NT_PRSTATUS:
462 va_start (ap, note_type);
463 pid = va_arg (ap, long);
464 cursig = va_arg (ap, int);
465 gregs = va_arg (ap, const void *);
466 va_end (ap);
467
468 if (bed->s->elfclass == ELFCLASS32)
469 {
470 if (bed->elf_machine_code == EM_X86_64)
471 {
472 prstatusx32_t prstat;
473 memset (&prstat, 0, sizeof (prstat));
474 prstat.pr_pid = pid;
475 prstat.pr_cursig = cursig;
476 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 477 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
478 &prstat, sizeof (prstat));
8fd79e71
L		 479 }
480 else
481 {
482 prstatus32_t prstat;
483 memset (&prstat, 0, sizeof (prstat));
484 prstat.pr_pid = pid;
485 prstat.pr_cursig = cursig;
486 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 487 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
488 &prstat, sizeof (prstat));
8fd79e71
L		 489 }
490 }
491 else
492 {
b1bd052d 493 prstatus64_t prstat;
8fd79e71
L		 494 memset (&prstat, 0, sizeof (prstat));
495 prstat.pr_pid = pid;
496 prstat.pr_cursig = cursig;
497 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 498 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
499 &prstat, sizeof (prstat));
8fd79e71 500 }
8fd79e71 501 }
e85c6a70 502 /* NOTREACHED */
8fd79e71
L		 503}
504#endif
3bab7989 505\f
407443a3 506/* Functions for the x86-64 ELF linker. */
70256ad8 507
407443a3 508/* The name of the dynamic interpreter. This is put in the .interp
70256ad8
AJ		 509 section. */
510
351f65ca 511#define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
eec9dd95 512#define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
70256ad8 513
d40d037c
AJ		 514/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
515 copying dynamic variables from a shared lib into an app's dynbss
516 section, and instead use a dynamic relocation to point into the
517 shared lib. */
518#define ELIMINATE_COPY_RELOCS 1
519
70256ad8
AJ		 520/* The size in bytes of an entry in the global offset table. */
521
522#define GOT_ENTRY_SIZE 8
8d88c4ca 523
70256ad8 524/* The size in bytes of an entry in the procedure linkage table. */
8d88c4ca 525
70256ad8
AJ		 526#define PLT_ENTRY_SIZE 16
527
528/* The first entry in a procedure linkage table looks like this. See the
529 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
530
351f65ca 531static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
70256ad8 532{
653165cc
AJ		 533 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
534 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
10efb593 535 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
70256ad8
AJ		 536};
537
538/* Subsequent entries in a procedure linkage table look like this. */
539
351f65ca 540static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
70256ad8 541{
653165cc 542 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
407443a3 543 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653165cc 544 0x68, /* pushq immediate */
70256ad8
AJ		 545 0, 0, 0, 0, /* replaced with index into relocation table. */
546 0xe9, /* jmp relative */
547 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
548};
549
e41b3a13
JJ		 550/* .eh_frame covering the .plt section. */
551
552static const bfd_byte elf_x86_64_eh_frame_plt[] =
553{
554#define PLT_CIE_LENGTH 20
555#define PLT_FDE_LENGTH 36
556#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
557#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
558 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
559 0, 0, 0, 0, /* CIE ID */
560 1, /* CIE version */
561 'z', 'R', 0, /* Augmentation string */
562 1, /* Code alignment factor */
563 0x78, /* Data alignment factor */
564 16, /* Return address column */
565 1, /* Augmentation size */
566 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
567 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
568 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
569 DW_CFA_nop, DW_CFA_nop,
570
571 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
572 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
573 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
574 0, 0, 0, 0, /* .plt size goes here */
575 0, /* Augmentation size */
576 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
577 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
578 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
579 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
580 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
581 11, /* Block length */
582 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
583 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
584 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
585 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
586 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
587};
588
eed180f8
RM		 589/* Architecture-specific backend data for x86-64. */
590
591struct elf_x86_64_backend_data
592{
593 /* Templates for the initial PLT entry and for subsequent entries. */
594 const bfd_byte *plt0_entry;
595 const bfd_byte *plt_entry;
596 unsigned int plt_entry_size; /* Size of each PLT entry. */
597
598 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
599 unsigned int plt0_got1_offset;
600 unsigned int plt0_got2_offset;
601
602 /* Offset of the end of the PC-relative instruction containing
603 plt0_got2_offset. */
604 unsigned int plt0_got2_insn_end;
605
606 /* Offsets into plt_entry that are to be replaced with... */
607 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
608 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
609 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
610
611 /* Length of the PC-relative instruction containing plt_got_offset. */
612 unsigned int plt_got_insn_size;
613
614 /* Offset of the end of the PC-relative jump to plt0_entry. */
615 unsigned int plt_plt_insn_end;
616
617 /* Offset into plt_entry where the initial value of the GOT entry points. */
618 unsigned int plt_lazy_offset;
619
620 /* .eh_frame covering the .plt section. */
621 const bfd_byte *eh_frame_plt;
622 unsigned int eh_frame_plt_size;
623};
624
625#define get_elf_x86_64_backend_data(abfd) \
626 ((const struct elf_x86_64_backend_data *) \
627 get_elf_backend_data (abfd)->arch_data)
628
629#define GET_PLT_ENTRY_SIZE(abfd) \
630 get_elf_x86_64_backend_data (abfd)->plt_entry_size
631
632/* These are the standard parameters. */
633static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
634 {
635 elf_x86_64_plt0_entry, /* plt0_entry */
636 elf_x86_64_plt_entry, /* plt_entry */
637 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
638 2, /* plt0_got1_offset */
639 8, /* plt0_got2_offset */
640 12, /* plt0_got2_insn_end */
641 2, /* plt_got_offset */
642 7, /* plt_reloc_offset */
643 12, /* plt_plt_offset */
644 6, /* plt_got_insn_size */
645 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
646 6, /* plt_lazy_offset */
647 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
648 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
649 };
650
651#define elf_backend_arch_data &elf_x86_64_arch_bed
652
70256ad8
AJ		 653/* x86-64 ELF linker hash entry. */
654
351f65ca 655struct elf_x86_64_link_hash_entry
70256ad8 656{
c434dee6 657 struct elf_link_hash_entry elf;
70256ad8 658
c434dee6 659 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 660 struct elf_dyn_relocs *dyn_relocs;
bffbf940
JJ		 661
662#define GOT_UNKNOWN 0
663#define GOT_NORMAL 1
664#define GOT_TLS_GD 2
665#define GOT_TLS_IE 3
67a4f2b7
AO		 666#define GOT_TLS_GDESC 4
667#define GOT_TLS_GD_BOTH_P(type) \
668 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
669#define GOT_TLS_GD_P(type) \
670 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
671#define GOT_TLS_GDESC_P(type) \
672 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
673#define GOT_TLS_GD_ANY_P(type) \
674 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
bffbf940 675 unsigned char tls_type;
67a4f2b7
AO		 676
677 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
678 starting at the end of the jump table. */
679 bfd_vma tlsdesc_got;
bffbf940
JJ		 680};
681
351f65ca
L		 682#define elf_x86_64_hash_entry(ent) \
683 ((struct elf_x86_64_link_hash_entry *)(ent))
bffbf940 684
351f65ca 685struct elf_x86_64_obj_tdata
bffbf940
JJ		 686{
687 struct elf_obj_tdata root;
688
689 /* tls_type for each local got entry. */
690 char *local_got_tls_type;
67a4f2b7
AO		 691
692 /* GOTPLT entries for TLS descriptors. */
693 bfd_vma *local_tlsdesc_gotent;
70256ad8
AJ		 694};
695
351f65ca
L		 696#define elf_x86_64_tdata(abfd) \
697 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
bffbf940 698
351f65ca
L		 699#define elf_x86_64_local_got_tls_type(abfd) \
700 (elf_x86_64_tdata (abfd)->local_got_tls_type)
bffbf940 701
351f65ca
L		 702#define elf_x86_64_local_tlsdesc_gotent(abfd) \
703 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
bffbf940 704
0ffa91dd
NC		 705#define is_x86_64_elf(bfd) \
706 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
707 && elf_tdata (bfd) != NULL \
4dfe6ac6 708 && elf_object_id (bfd) == X86_64_ELF_DATA)
0ffa91dd
NC		 709
710static bfd_boolean
351f65ca 711elf_x86_64_mkobject (bfd *abfd)
0ffa91dd 712{
351f65ca 713 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
4dfe6ac6 714 X86_64_ELF_DATA);
0ffa91dd
NC		 715}
716
c434dee6 717/* x86-64 ELF linker hash table. */
8d88c4ca 718
351f65ca 719struct elf_x86_64_link_hash_table
407443a3 720{
c434dee6 721 struct elf_link_hash_table elf;
70256ad8 722
c434dee6 723 /* Short-cuts to get to dynamic linker sections. */
c434dee6
AJ		 724 asection *sdynbss;
725 asection *srelbss;
e41b3a13 726 asection *plt_eh_frame;
70256ad8 727
4dfe6ac6
NC		 728 union
729 {
bffbf940
JJ		 730 bfd_signed_vma refcount;
731 bfd_vma offset;
732 } tls_ld_got;
733
67a4f2b7
AO		 734 /* The amount of space used by the jump slots in the GOT. */
735 bfd_vma sgotplt_jump_table_size;
736
87d72d41
AM		 737 /* Small local sym cache. */
738 struct sym_cache sym_cache;
9f03412a 739
351f65ca
L		 740 bfd_vma (*r_info) (bfd_vma, bfd_vma);
741 bfd_vma (*r_sym) (bfd_vma);
248775ba 742 unsigned int pointer_r_type;
351f65ca
L		 743 const char *dynamic_interpreter;
744 int dynamic_interpreter_size;
745
9f03412a
AO		 746 /* _TLS_MODULE_BASE_ symbol. */
747 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L		 748
749 /* Used by local STT_GNU_IFUNC symbols. */
750 htab_t loc_hash_table;
4dfe6ac6
NC		 751 void * loc_hash_memory;
752
753 /* The offset into splt of the PLT entry for the TLS descriptor
754 resolver. Special values are 0, if not necessary (or not found
755 to be necessary yet), and -1 if needed but not determined
756 yet. */
757 bfd_vma tlsdesc_plt;
758 /* The offset into sgot of the GOT entry used by the PLT entry
759 above. */
760 bfd_vma tlsdesc_got;
e1f98742
L		 761
762 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
763 bfd_vma next_jump_slot_index;
764 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
765 bfd_vma next_irelative_index;
c434dee6 766};
70256ad8
AJ		 767
768/* Get the x86-64 ELF linker hash table from a link_info structure. */
8d88c4ca 769
351f65ca 770#define elf_x86_64_hash_table(p) \
4dfe6ac6 771 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
351f65ca 772 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
8d88c4ca 773
351f65ca 774#define elf_x86_64_compute_jump_table_size(htab) \
6de2ae4a 775 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
67a4f2b7 776
407443a3 777/* Create an entry in an x86-64 ELF linker hash table. */
70256ad8
AJ		 778
779static struct bfd_hash_entry *
351f65ca
L		 780elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
781 struct bfd_hash_table *table,
782 const char *string)
70256ad8 783{
70256ad8 784 /* Allocate the structure if it has not already been allocated by a
c434dee6
AJ		 785 subclass. */
786 if (entry == NULL)
787 {
a50b1753 788 entry = (struct bfd_hash_entry *)
eed180f8
RM		 789 bfd_hash_allocate (table,
790 sizeof (struct elf_x86_64_link_hash_entry));
c434dee6
AJ		 791 if (entry == NULL)
792 return entry;
793 }
70256ad8
AJ		 794
795 /* Call the allocation method of the superclass. */
c434dee6
AJ		 796 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
797 if (entry != NULL)
70256ad8 798 {
351f65ca 799 struct elf_x86_64_link_hash_entry *eh;
c434dee6 800
351f65ca 801 eh = (struct elf_x86_64_link_hash_entry *) entry;
c434dee6 802 eh->dyn_relocs = NULL;
bffbf940 803 eh->tls_type = GOT_UNKNOWN;
67a4f2b7 804 eh->tlsdesc_got = (bfd_vma) -1;
70256ad8
AJ		 805 }
806
c434dee6 807 return entry;
70256ad8
AJ		 808}
809
c25bc9fc
L		 810/* Compute a hash of a local hash entry. We use elf_link_hash_entry
811 for local symbol so that we can handle local STT_GNU_IFUNC symbols
812 as global symbol. We reuse indx and dynstr_index for local symbol
813 hash since they aren't used by global symbols in this backend. */
814
815static hashval_t
351f65ca 816elf_x86_64_local_htab_hash (const void *ptr)
c25bc9fc
L		 817{
818 struct elf_link_hash_entry *h
819 = (struct elf_link_hash_entry *) ptr;
d2149d72 820 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L		 821}
822
823/* Compare local hash entries. */
824
825static int
351f65ca 826elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
c25bc9fc
L		 827{
828 struct elf_link_hash_entry *h1
829 = (struct elf_link_hash_entry *) ptr1;
830 struct elf_link_hash_entry *h2
831 = (struct elf_link_hash_entry *) ptr2;
832
833 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
834}
835
836/* Find and/or create a hash entry for local symbol. */
837
838static struct elf_link_hash_entry *
351f65ca
L		 839elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
840 bfd *abfd, const Elf_Internal_Rela *rel,
841 bfd_boolean create)
c25bc9fc 842{
351f65ca 843 struct elf_x86_64_link_hash_entry e, *ret;
c25bc9fc 844 asection *sec = abfd->sections;
d2149d72 845 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
351f65ca 846 htab->r_sym (rel->r_info));
c25bc9fc
L		 847 void **slot;
848
849 e.elf.indx = sec->id;
351f65ca 850 e.elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc
L		 851 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
852 create ? INSERT : NO_INSERT);
853
854 if (!slot)
855 return NULL;
856
857 if (*slot)
858 {
351f65ca 859 ret = (struct elf_x86_64_link_hash_entry *) *slot;
c25bc9fc
L		 860 return &ret->elf;
861 }
862
351f65ca 863 ret = (struct elf_x86_64_link_hash_entry *)
c25bc9fc 864 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
351f65ca 865 sizeof (struct elf_x86_64_link_hash_entry));
c25bc9fc
L		 866 if (ret)
867 {
868 memset (ret, 0, sizeof (*ret));
869 ret->elf.indx = sec->id;
351f65ca 870 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc 871 ret->elf.dynindx = -1;
c25bc9fc
L		 872 *slot = ret;
873 }
874 return &ret->elf;
875}
876
8d88c4ca
NC		 877/* Create an X86-64 ELF linker hash table. */
878
879static struct bfd_link_hash_table *
351f65ca 880elf_x86_64_link_hash_table_create (bfd *abfd)
8d88c4ca 881{
351f65ca
L		 882 struct elf_x86_64_link_hash_table *ret;
883 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
8d88c4ca 884
351f65ca 885 ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt);
c434dee6 886 if (ret == NULL)
8d88c4ca
NC		 887 return NULL;
888
eb4ff4d6 889 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
351f65ca
L		 890 elf_x86_64_link_hash_newfunc,
891 sizeof (struct elf_x86_64_link_hash_entry),
4dfe6ac6 892 X86_64_ELF_DATA))
8d88c4ca 893 {
e2d34d7d 894 free (ret);
8d88c4ca
NC		 895 return NULL;
896 }
897
c434dee6
AJ		 898 ret->sdynbss = NULL;
899 ret->srelbss = NULL;
332ce62b 900 ret->plt_eh_frame = NULL;
87d72d41 901 ret->sym_cache.abfd = NULL;
67a4f2b7
AO		 902 ret->tlsdesc_plt = 0;
903 ret->tlsdesc_got = 0;
bffbf940 904 ret->tls_ld_got.refcount = 0;
67a4f2b7 905 ret->sgotplt_jump_table_size = 0;
9f03412a 906 ret->tls_module_base = NULL;
eed180f8 907 ret->next_jump_slot_index = 0;
e1f98742 908 ret->next_irelative_index = 0;
6bbec505 909
351f65ca
L		 910 if (ABI_64_P (abfd))
911 {
912 ret->r_info = elf64_r_info;
913 ret->r_sym = elf64_r_sym;
248775ba 914 ret->pointer_r_type = R_X86_64_64;
351f65ca
L		 915 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
916 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
917 }
918 else
919 {
920 ret->r_info = elf32_r_info;
921 ret->r_sym = elf32_r_sym;
248775ba 922 ret->pointer_r_type = R_X86_64_32;
351f65ca
L		 923 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
924 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
925 }
926
c25bc9fc 927 ret->loc_hash_table = htab_try_create (1024,
351f65ca
L		 928 elf_x86_64_local_htab_hash,
929 elf_x86_64_local_htab_eq,
c25bc9fc
L		 930 NULL);
931 ret->loc_hash_memory = objalloc_create ();
932 if (!ret->loc_hash_table || !ret->loc_hash_memory)
933 {
934 free (ret);
935 return NULL;
936 }
937
c434dee6
AJ		 938 return &ret->elf.root;
939}
940
c25bc9fc
L		 941/* Destroy an X86-64 ELF linker hash table. */
942
943static void
351f65ca 944elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash)
c25bc9fc 945{
351f65ca
L		 946 struct elf_x86_64_link_hash_table *htab
947 = (struct elf_x86_64_link_hash_table *) hash;
c25bc9fc
L		 948
949 if (htab->loc_hash_table)
950 htab_delete (htab->loc_hash_table);
951 if (htab->loc_hash_memory)
952 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
953 _bfd_generic_link_hash_table_free (hash);
954}
955
c434dee6
AJ		 956/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
957 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
958 hash table. */
959
b34976b6 960static bfd_boolean
351f65ca
L		 961elf_x86_64_create_dynamic_sections (bfd *dynobj,
962 struct bfd_link_info *info)
c434dee6 963{
351f65ca 964 struct elf_x86_64_link_hash_table *htab;
c434dee6 965
c434dee6 966 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 967 return FALSE;
c434dee6 968
351f65ca 969 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 970 if (htab == NULL)
971 return FALSE;
972
3d4d4302 973 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
c434dee6 974 if (!info->shared)
3d4d4302 975 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
c434dee6 976
6de2ae4a 977 if (!htab->sdynbss
c434dee6
AJ		 978 || (!info->shared && !htab->srelbss))
979 abort ();
980
e41b3a13 981 if (!info->no_ld_generated_unwind_info
2fe0fd06 982 && htab->plt_eh_frame == NULL
e4de50d4 983 && htab->elf.splt != NULL)
e41b3a13 984 {
bbf96e4e
L		 985 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
986 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
987 | SEC_LINKER_CREATED);
e41b3a13 988 htab->plt_eh_frame
bbf96e4e 989 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ		 990 if (htab->plt_eh_frame == NULL
991 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
992 return FALSE;
e41b3a13 993 }
b34976b6 994 return TRUE;
c434dee6
AJ		 995}
996
997/* Copy the extra info we tack onto an elf_link_hash_entry. */
998
999static void
351f65ca
L		 1000elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1001 struct elf_link_hash_entry *dir,
1002 struct elf_link_hash_entry *ind)
c434dee6 1003{
351f65ca 1004 struct elf_x86_64_link_hash_entry *edir, *eind;
c434dee6 1005
351f65ca
L		 1006 edir = (struct elf_x86_64_link_hash_entry *) dir;
1007 eind = (struct elf_x86_64_link_hash_entry *) ind;
c434dee6
AJ		 1008
1009 if (eind->dyn_relocs != NULL)
1010 {
1011 if (edir->dyn_relocs != NULL)
1012 {
e03a8ed8
L		 1013 struct elf_dyn_relocs **pp;
1014 struct elf_dyn_relocs *p;
c434dee6 1015
fcfa13d2 1016 /* Add reloc counts against the indirect sym to the direct sym
c434dee6
AJ		 1017 list. Merge any entries against the same section. */
1018 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1019 {
e03a8ed8 1020 struct elf_dyn_relocs *q;
c434dee6
AJ		 1021
1022 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1023 if (q->sec == p->sec)
1024 {
1025 q->pc_count += p->pc_count;
1026 q->count += p->count;
1027 *pp = p->next;
1028 break;
1029 }
1030 if (q == NULL)
1031 pp = &p->next;
1032 }
1033 *pp = edir->dyn_relocs;
1034 }
1035
1036 edir->dyn_relocs = eind->dyn_relocs;
1037 eind->dyn_relocs = NULL;
1038 }
1039
bffbf940
JJ		 1040 if (ind->root.type == bfd_link_hash_indirect
1041 && dir->got.refcount <= 0)
1042 {
1043 edir->tls_type = eind->tls_type;
1044 eind->tls_type = GOT_UNKNOWN;
1045 }
1046
d40d037c
AJ		 1047 if (ELIMINATE_COPY_RELOCS
1048 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 1049 && dir->dynamic_adjusted)
1050 {
1051 /* If called to transfer flags for a weakdef during processing
1052 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1053 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1054 dir->ref_dynamic |= ind->ref_dynamic;
1055 dir->ref_regular |= ind->ref_regular;
1056 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1057 dir->needs_plt |= ind->needs_plt;
1058 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1059 }
d40d037c 1060 else
fcfa13d2 1061 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
8d88c4ca
NC		 1062}
1063
b34976b6 1064static bfd_boolean
27482721 1065elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940 1066{
8d88c4ca
NC		 1067 /* Set the right machine number for an x86-64 elf64 file. */
1068 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 1069 return TRUE;
8d88c4ca
NC		 1070}
1071
8059fb19
RM		 1072static bfd_boolean
1073elf32_x86_64_elf_object_p (bfd *abfd)
1074{
1075 /* Set the right machine number for an x86-64 elf32 file. */
1076 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1077 return TRUE;
1078}
1079
142411ca
L		 1080/* Return TRUE if the TLS access code sequence support transition
1081 from R_TYPE. */
1082
1083static bfd_boolean
351f65ca
L		 1084elf_x86_64_check_tls_transition (bfd *abfd,
1085 struct bfd_link_info *info,
1086 asection *sec,
1087 bfd_byte *contents,
1088 Elf_Internal_Shdr *symtab_hdr,
1089 struct elf_link_hash_entry **sym_hashes,
1090 unsigned int r_type,
1091 const Elf_Internal_Rela *rel,
1092 const Elf_Internal_Rela *relend)
bffbf940 1093{
142411ca
L		 1094 unsigned int val;
1095 unsigned long r_symndx;
1096 struct elf_link_hash_entry *h;
1097 bfd_vma offset;
351f65ca 1098 struct elf_x86_64_link_hash_table *htab;
142411ca
L		 1099
1100 /* Get the section contents. */
1101 if (contents == NULL)
1102 {
1103 if (elf_section_data (sec)->this_hdr.contents != NULL)
1104 contents = elf_section_data (sec)->this_hdr.contents;
1105 else
1106 {
1107 /* FIXME: How to better handle error condition? */
1108 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1109 return FALSE;
bffbf940 1110
142411ca
L		 1111 /* Cache the section contents for elf_link_input_bfd. */
1112 elf_section_data (sec)->this_hdr.contents = contents;
1113 }
1114 }
1115
351f65ca 1116 htab = elf_x86_64_hash_table (info);
142411ca 1117 offset = rel->r_offset;
bffbf940 1118 switch (r_type)
142411ca
L		 1119 {
1120 case R_X86_64_TLSGD:
1121 case R_X86_64_TLSLD:
1122 if ((rel + 1) >= relend)
1123 return FALSE;
1124
1125 if (r_type == R_X86_64_TLSGD)
1126 {
52bc799a 1127 /* Check transition from GD access model. For 64bit, only
142411ca
L		 1128 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1129 .word 0x6666; rex64; call __tls_get_addr
52bc799a
L		 1130 can transit to different access model. For 32bit, only
1131 leaq foo@tlsgd(%rip), %rdi
1132 .word 0x6666; rex64; call __tls_get_addr
142411ca
L		 1133 can transit to different access model. */
1134
fa289a5f
AM		 1135 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1136 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1137
52bc799a 1138 if ((offset + 12) > sec->size
fa289a5f 1139 || memcmp (contents + offset + 4, call, 4) != 0)
142411ca 1140 return FALSE;
52bc799a
L		 1141
1142 if (ABI_64_P (abfd))
1143 {
52bc799a 1144 if (offset < 4
fa289a5f 1145 || memcmp (contents + offset - 4, leaq, 4) != 0)
52bc799a
L		 1146 return FALSE;
1147 }
1148 else
1149 {
52bc799a 1150 if (offset < 3
fa289a5f 1151 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
52bc799a
L		 1152 return FALSE;
1153 }
142411ca
L		 1154 }
1155 else
1156 {
1157 /* Check transition from LD access model. Only
1158 leaq foo@tlsld(%rip), %rdi;
1159 call __tls_get_addr
1160 can transit to different access model. */
1161
fa289a5f 1162 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
142411ca
L		 1163
1164 if (offset < 3 || (offset + 9) > sec->size)
1165 return FALSE;
1166
fa289a5f
AM		 1167 if (memcmp (contents + offset - 3, lea, 3) != 0
1168 || 0xe8 != *(contents + offset + 4))
142411ca
L		 1169 return FALSE;
1170 }
1171
351f65ca 1172 r_symndx = htab->r_sym (rel[1].r_info);
142411ca
L		 1173 if (r_symndx < symtab_hdr->sh_info)
1174 return FALSE;
1175
1176 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b 1177 /* Use strncmp to check __tls_get_addr since __tls_get_addr
eed180f8 1178 may be versioned. */
142411ca
L		 1179 return (h != NULL
1180 && h->root.root.string != NULL
351f65ca
L		 1181 && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1182 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)
c4fb387b
L		 1183 && (strncmp (h->root.root.string,
1184 "__tls_get_addr", 14) == 0));
142411ca
L		 1185
1186 case R_X86_64_GOTTPOFF:
1187 /* Check transition from IE access model:
4a4c5f25
L		 1188 mov foo@gottpoff(%rip), %reg
1189 add foo@gottpoff(%rip), %reg
142411ca
L		 1190 */
1191
4a4c5f25
L		 1192 /* Check REX prefix first. */
1193 if (offset >= 3 && (offset + 4) <= sec->size)
1194 {
1195 val = bfd_get_8 (abfd, contents + offset - 3);
1196 if (val != 0x48 && val != 0x4c)
1197 {
1198 /* X32 may have 0x44 REX prefix or no REX prefix. */
1199 if (ABI_64_P (abfd))
1200 return FALSE;
1201 }
1202 }
1203 else
1204 {
1205 /* X32 may not have any REX prefix. */
1206 if (ABI_64_P (abfd))
1207 return FALSE;
1208 if (offset < 2 || (offset + 3) > sec->size)
1209 return FALSE;
1210 }
142411ca
L		 1211
1212 val = bfd_get_8 (abfd, contents + offset - 2);
1213 if (val != 0x8b && val != 0x03)
1214 return FALSE;
1215
1216 val = bfd_get_8 (abfd, contents + offset - 1);
1217 return (val & 0xc7) == 5;
1218
1219 case R_X86_64_GOTPC32_TLSDESC:
1220 /* Check transition from GDesc access model:
1221 leaq x@tlsdesc(%rip), %rax
1222
1223 Make sure it's a leaq adding rip to a 32-bit offset
1224 into any register, although it's probably almost always
1225 going to be rax. */
1226
1227 if (offset < 3 || (offset + 4) > sec->size)
1228 return FALSE;
1229
1230 val = bfd_get_8 (abfd, contents + offset - 3);
1231 if ((val & 0xfb) != 0x48)
1232 return FALSE;
1233
1234 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1235 return FALSE;
1236
1237 val = bfd_get_8 (abfd, contents + offset - 1);
1238 return (val & 0xc7) == 0x05;
1239
1240 case R_X86_64_TLSDESC_CALL:
1241 /* Check transition from GDesc access model:
1242 call *x@tlsdesc(%rax)
1243 */
1244 if (offset + 2 <= sec->size)
1245 {
1246 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM		 1247 static const unsigned char call[] = { 0xff, 0x10 };
1248 return memcmp (contents + offset, call, 2) == 0;
142411ca
L		 1249 }
1250
1251 return FALSE;
1252
1253 default:
1254 abort ();
1255 }
1256}
1257
1258/* Return TRUE if the TLS access transition is OK or no transition
1259 will be performed. Update R_TYPE if there is a transition. */
1260
1261static bfd_boolean
351f65ca
L		 1262elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1263 asection *sec, bfd_byte *contents,
1264 Elf_Internal_Shdr *symtab_hdr,
1265 struct elf_link_hash_entry **sym_hashes,
1266 unsigned int *r_type, int tls_type,
1267 const Elf_Internal_Rela *rel,
1268 const Elf_Internal_Rela *relend,
1269 struct elf_link_hash_entry *h,
1270 unsigned long r_symndx)
142411ca
L		 1271{
1272 unsigned int from_type = *r_type;
1273 unsigned int to_type = from_type;
1274 bfd_boolean check = TRUE;
1275
bb1cb422
L		 1276 /* Skip TLS transition for functions. */
1277 if (h != NULL
1278 && (h->type == STT_FUNC
1279 || h->type == STT_GNU_IFUNC))
1280 return TRUE;
1281
142411ca 1282 switch (from_type)
bffbf940
JJ		 1283 {
1284 case R_X86_64_TLSGD:
67a4f2b7
AO		 1285 case R_X86_64_GOTPC32_TLSDESC:
1286 case R_X86_64_TLSDESC_CALL:
bffbf940 1287 case R_X86_64_GOTTPOFF:
1d85728f 1288 if (info->executable)
142411ca
L		 1289 {
1290 if (h == NULL)
1291 to_type = R_X86_64_TPOFF32;
1292 else
1293 to_type = R_X86_64_GOTTPOFF;
1294 }
1295
351f65ca 1296 /* When we are called from elf_x86_64_relocate_section,
142411ca
L		 1297 CONTENTS isn't NULL and there may be additional transitions
1298 based on TLS_TYPE. */
1299 if (contents != NULL)
1300 {
1301 unsigned int new_to_type = to_type;
1302
1d85728f 1303 if (info->executable
142411ca
L		 1304 && h != NULL
1305 && h->dynindx == -1
1306 && tls_type == GOT_TLS_IE)
1307 new_to_type = R_X86_64_TPOFF32;
1308
1309 if (to_type == R_X86_64_TLSGD
1310 || to_type == R_X86_64_GOTPC32_TLSDESC
1311 || to_type == R_X86_64_TLSDESC_CALL)
1312 {
1313 if (tls_type == GOT_TLS_IE)
1314 new_to_type = R_X86_64_GOTTPOFF;
1315 }
1316
1317 /* We checked the transition before when we were called from
351f65ca 1318 elf_x86_64_check_relocs. We only want to check the new
142411ca
L		 1319 transition which hasn't been checked before. */
1320 check = new_to_type != to_type && from_type == to_type;
1321 to_type = new_to_type;
1322 }
1323
1324 break;
1325
bffbf940 1326 case R_X86_64_TLSLD:
1d85728f 1327 if (info->executable)
142411ca
L		 1328 to_type = R_X86_64_TPOFF32;
1329 break;
1330
1331 default:
1332 return TRUE;
bffbf940
JJ		 1333 }
1334
142411ca
L		 1335 /* Return TRUE if there is no transition. */
1336 if (from_type == to_type)
1337 return TRUE;
1338
1339 /* Check if the transition can be performed. */
1340 if (check
351f65ca
L		 1341 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1342 symtab_hdr, sym_hashes,
1343 from_type, rel, relend))
142411ca 1344 {
2f629d23 1345 reloc_howto_type *from, *to;
4c544807 1346 const char *name;
142411ca 1347
351f65ca
L		 1348 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1349 to = elf_x86_64_rtype_to_howto (abfd, to_type);
142411ca 1350
4c544807
L		 1351 if (h)
1352 name = h->root.root.string;
1353 else
1354 {
351f65ca 1355 struct elf_x86_64_link_hash_table *htab;
4dfe6ac6 1356
351f65ca 1357 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1358 if (htab == NULL)
1359 name = "*unknown*";
1360 else
1361 {
1362 Elf_Internal_Sym *isym;
1363
1364 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1365 abfd, r_symndx);
1366 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1367 }
4c544807
L		 1368 }
1369
142411ca
L		 1370 (*_bfd_error_handler)
1371 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1372 "in section `%A' failed"),
4c544807 1373 abfd, sec, from->name, to->name, name,
142411ca
L		 1374 (unsigned long) rel->r_offset);
1375 bfd_set_error (bfd_error_bad_value);
1376 return FALSE;
1377 }
1378
1379 *r_type = to_type;
1380 return TRUE;
bffbf940
JJ		 1381}
1382
70256ad8 1383/* Look through the relocs for a section during the first phase, and
c434dee6
AJ		 1384 calculate needed space in the global offset table, procedure
1385 linkage table, and dynamic reloc sections. */
70256ad8 1386
b34976b6 1387static bfd_boolean
351f65ca
L		 1388elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1389 asection *sec,
1390 const Elf_Internal_Rela *relocs)
70256ad8 1391{
351f65ca 1392 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 1393 Elf_Internal_Shdr *symtab_hdr;
1394 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ		 1395 const Elf_Internal_Rela *rel;
1396 const Elf_Internal_Rela *rel_end;
70256ad8
AJ		 1397 asection *sreloc;
1398
1049f94e 1399 if (info->relocatable)
b34976b6 1400 return TRUE;
70256ad8 1401
0ffa91dd
NC		 1402 BFD_ASSERT (is_x86_64_elf (abfd));
1403
351f65ca 1404 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1405 if (htab == NULL)
1406 return FALSE;
1407
0ffa91dd 1408 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8 1409 sym_hashes = elf_sym_hashes (abfd);
70256ad8 1410
c434dee6 1411 sreloc = NULL;
cbe950e9 1412
70256ad8
AJ		 1413 rel_end = relocs + sec->reloc_count;
1414 for (rel = relocs; rel < rel_end; rel++)
1415 {
bffbf940 1416 unsigned int r_type;
70256ad8
AJ		 1417 unsigned long r_symndx;
1418 struct elf_link_hash_entry *h;
4c544807
L		 1419 Elf_Internal_Sym *isym;
1420 const char *name;
70256ad8 1421
351f65ca
L		 1422 r_symndx = htab->r_sym (rel->r_info);
1423 r_type = ELF32_R_TYPE (rel->r_info);
c434dee6
AJ		 1424
1425 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1426 {
d003868e
AM		 1427 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1428 abfd, r_symndx);
b34976b6 1429 return FALSE;
c434dee6
AJ		 1430 }
1431
70256ad8 1432 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1433 {
1434 /* A local symbol. */
c2e61a4e
L		 1435 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1436 abfd, r_symndx);
1437 if (isym == NULL)
1438 return FALSE;
c25bc9fc
L		 1439
1440 /* Check relocation against local STT_GNU_IFUNC symbol. */
351f65ca 1441 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
c25bc9fc 1442 {
351f65ca
L		 1443 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1444 TRUE);
c25bc9fc 1445 if (h == NULL)
c2e61a4e 1446 return FALSE;
6bbec505 1447
c25bc9fc
L		 1448 /* Fake a STT_GNU_IFUNC symbol. */
1449 h->type = STT_GNU_IFUNC;
1450 h->def_regular = 1;
1451 h->ref_regular = 1;
1452 h->forced_local = 1;
1453 h->root.type = bfd_link_hash_defined;
1454 }
1455 else
1456 h = NULL;
1457 }
70256ad8 1458 else
71cb9464 1459 {
4c544807 1460 isym = NULL;
71cb9464
L		 1461 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1462 while (h->root.type == bfd_link_hash_indirect
1463 || h->root.type == bfd_link_hash_warning)
1464 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1465 }
cbe950e9 1466
d1534d16
L		 1467 /* Check invalid x32 relocations. */
1468 if (!ABI_64_P (abfd))
1469 switch (r_type)
1470 {
1471 default:
1472 break;
1473
d1534d16
L		 1474 case R_X86_64_DTPOFF64:
1475 case R_X86_64_TPOFF64:
1476 case R_X86_64_PC64:
1477 case R_X86_64_GOTOFF64:
1478 case R_X86_64_GOT64:
1479 case R_X86_64_GOTPCREL64:
1480 case R_X86_64_GOTPC64:
1481 case R_X86_64_GOTPLT64:
1482 case R_X86_64_PLTOFF64:
1483 {
1484 if (h)
1485 name = h->root.root.string;
1486 else
1487 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1488 NULL);
1489 (*_bfd_error_handler)
1490 (_("%B: relocation %s against symbol `%s' isn't "
1491 "supported in x32 mode"), abfd,
1492 x86_64_elf_howto_table[r_type].name, name);
1493 bfd_set_error (bfd_error_bad_value);
1494 return FALSE;
1495 }
1496 break;
1497 }
1498
c25bc9fc
L		 1499 if (h != NULL)
1500 {
cbe950e9
L		 1501 /* Create the ifunc sections for static executables. If we
1502 never see an indirect function symbol nor we are building
1503 a static executable, those sections will be empty and
1504 won't appear in output. */
1505 switch (r_type)
1506 {
1507 default:
1508 break;
1509
1510 case R_X86_64_32S:
1511 case R_X86_64_32:
1512 case R_X86_64_64:
1513 case R_X86_64_PC32:
1514 case R_X86_64_PC64:
1515 case R_X86_64_PLT32:
1516 case R_X86_64_GOTPCREL:
1517 case R_X86_64_GOTPCREL64:
9d4057ee
AM		 1518 if (htab->elf.dynobj == NULL)
1519 htab->elf.dynobj = abfd;
1520 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
c2e61a4e 1521 return FALSE;
cbe950e9
L		 1522 break;
1523 }
1524
ad1e85de
L		 1525 /* It is referenced by a non-shared object. */
1526 h->ref_regular = 1;
71cb9464 1527 }
70256ad8 1528
351f65ca
L		 1529 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1530 symtab_hdr, sym_hashes,
1531 &r_type, GOT_UNKNOWN,
1532 rel, rel_end, h, r_symndx))
c2e61a4e 1533 return FALSE;
142411ca 1534
bffbf940 1535 switch (r_type)
70256ad8 1536 {
bffbf940
JJ		 1537 case R_X86_64_TLSLD:
1538 htab->tls_ld_got.refcount += 1;
1539 goto create_got;
1540
1541 case R_X86_64_TPOFF32:
351f65ca 1542 if (!info->executable && ABI_64_P (abfd))
70256ad8 1543 {
09a24cbf 1544 if (h)
4c544807
L		 1545 name = h->root.root.string;
1546 else
1547 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1548 NULL);
bffbf940 1549 (*_bfd_error_handler)
d003868e
AM		 1550 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1551 abfd,
4c544807 1552 x86_64_elf_howto_table[r_type].name, name);
bffbf940 1553 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1554 return FALSE;
70256ad8 1555 }
bffbf940 1556 break;
c434dee6 1557
bffbf940 1558 case R_X86_64_GOTTPOFF:
1d85728f 1559 if (!info->executable)
bffbf940
JJ		 1560 info->flags |= DF_STATIC_TLS;
1561 /* Fall through */
70256ad8 1562
bffbf940
JJ		 1563 case R_X86_64_GOT32:
1564 case R_X86_64_GOTPCREL:
1565 case R_X86_64_TLSGD:
7b81dfbb
AJ		 1566 case R_X86_64_GOT64:
1567 case R_X86_64_GOTPCREL64:
1568 case R_X86_64_GOTPLT64:
67a4f2b7
AO		 1569 case R_X86_64_GOTPC32_TLSDESC:
1570 case R_X86_64_TLSDESC_CALL:
bffbf940
JJ		 1571 /* This symbol requires a global offset table entry. */
1572 {
1573 int tls_type, old_tls_type;
1574
1575 switch (r_type)
1576 {
1577 default: tls_type = GOT_NORMAL; break;
1578 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1579 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
67a4f2b7
AO		 1580 case R_X86_64_GOTPC32_TLSDESC:
1581 case R_X86_64_TLSDESC_CALL:
1582 tls_type = GOT_TLS_GDESC; break;
bffbf940
JJ		 1583 }
1584
1585 if (h != NULL)
1586 {
7b81dfbb
AJ		 1587 if (r_type == R_X86_64_GOTPLT64)
1588 {
1589 /* This relocation indicates that we also need
1590 a PLT entry, as this is a function. We don't need
1591 a PLT entry for local symbols. */
1592 h->needs_plt = 1;
1593 h->plt.refcount += 1;
1594 }
bffbf940 1595 h->got.refcount += 1;
351f65ca 1596 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
bffbf940
JJ		 1597 }
1598 else
1599 {
1600 bfd_signed_vma *local_got_refcounts;
1601
1602 /* This is a global offset table entry for a local symbol. */
1603 local_got_refcounts = elf_local_got_refcounts (abfd);
1604 if (local_got_refcounts == NULL)
1605 {
1606 bfd_size_type size;
1607
1608 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1609 size *= sizeof (bfd_signed_vma)
1610 + sizeof (bfd_vma) + sizeof (char);
bffbf940
JJ		 1611 local_got_refcounts = ((bfd_signed_vma *)
1612 bfd_zalloc (abfd, size));
1613 if (local_got_refcounts == NULL)
c2e61a4e 1614 return FALSE;
bffbf940 1615 elf_local_got_refcounts (abfd) = local_got_refcounts;
351f65ca 1616 elf_x86_64_local_tlsdesc_gotent (abfd)
67a4f2b7 1617 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
351f65ca 1618 elf_x86_64_local_got_tls_type (abfd)
67a4f2b7 1619 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
bffbf940
JJ		 1620 }
1621 local_got_refcounts[r_symndx] += 1;
1622 old_tls_type
351f65ca 1623 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
bffbf940
JJ		 1624 }
1625
1626 /* If a TLS symbol is accessed using IE at least once,
1627 there is no point to use dynamic model for it. */
1628 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7
AO		 1629 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1630 || tls_type != GOT_TLS_IE))
bffbf940 1631 {
67a4f2b7 1632 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
bffbf940 1633 tls_type = old_tls_type;
67a4f2b7
AO		 1634 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1635 && GOT_TLS_GD_ANY_P (tls_type))
1636 tls_type |= old_tls_type;
bffbf940
JJ		 1637 else
1638 {
09a24cbf 1639 if (h)
4c544807
L		 1640 name = h->root.root.string;
1641 else
1642 name = bfd_elf_sym_name (abfd, symtab_hdr,
1643 isym, NULL);
bffbf940 1644 (*_bfd_error_handler)
1f7a4e42 1645 (_("%B: '%s' accessed both as normal and thread local symbol"),
4c544807 1646 abfd, name);
c2e61a4e 1647 return FALSE;
bffbf940
JJ		 1648 }
1649 }
1650
1651 if (old_tls_type != tls_type)
1652 {
1653 if (h != NULL)
351f65ca 1654 elf_x86_64_hash_entry (h)->tls_type = tls_type;
bffbf940 1655 else
351f65ca 1656 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
bffbf940
JJ		 1657 }
1658 }
c434dee6
AJ		 1659 /* Fall through */
1660
d6ab8113
JB		 1661 case R_X86_64_GOTOFF64:
1662 case R_X86_64_GOTPC32:
7b81dfbb 1663 case R_X86_64_GOTPC64:
bffbf940 1664 create_got:
6de2ae4a 1665 if (htab->elf.sgot == NULL)
c434dee6
AJ		 1666 {
1667 if (htab->elf.dynobj == NULL)
1668 htab->elf.dynobj = abfd;
6de2ae4a
L		 1669 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1670 info))
c2e61a4e 1671 return FALSE;
c434dee6 1672 }
70256ad8
AJ		 1673 break;
1674
1675 case R_X86_64_PLT32:
1676 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ		 1677 actually build the entry in adjust_dynamic_symbol,
1678 because this might be a case of linking PIC code which is
1679 never referenced by a dynamic object, in which case we
1680 don't need to generate a procedure linkage table entry
1681 after all. */
70256ad8
AJ		 1682
1683 /* If this is a local symbol, we resolve it directly without
407443a3 1684 creating a procedure linkage table entry. */
70256ad8
AJ		 1685 if (h == NULL)
1686 continue;
1687
f5385ebf 1688 h->needs_plt = 1;
51b64d56 1689 h->plt.refcount += 1;
70256ad8
AJ		 1690 break;
1691
7b81dfbb
AJ		 1692 case R_X86_64_PLTOFF64:
1693 /* This tries to form the 'address' of a function relative
1694 to GOT. For global symbols we need a PLT entry. */
1695 if (h != NULL)
1696 {
1697 h->needs_plt = 1;
1698 h->plt.refcount += 1;
1699 }
1700 goto create_got;
1701
248775ba
L		 1702 case R_X86_64_32:
1703 if (!ABI_64_P (abfd))
1704 goto pointer;
cc78d0af
AJ		 1705 case R_X86_64_8:
1706 case R_X86_64_16:
70256ad8 1707 case R_X86_64_32S:
1b71fb54
AJ		 1708 /* Let's help debug shared library creation. These relocs
1709 cannot be used in shared libs. Don't error out for
1710 sections we don't care about, such as debug sections or
1711 non-constant sections. */
1712 if (info->shared
1713 && (sec->flags & SEC_ALLOC) != 0
1714 && (sec->flags & SEC_READONLY) != 0)
1715 {
09a24cbf 1716 if (h)
4c544807
L		 1717 name = h->root.root.string;
1718 else
1719 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1b71fb54 1720 (*_bfd_error_handler)
d003868e 1721 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
4c544807 1722 abfd, x86_64_elf_howto_table[r_type].name, name);
1b71fb54 1723 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1724 return FALSE;
1b71fb54
AJ		 1725 }
1726 /* Fall through. */
1727
c434dee6
AJ		 1728 case R_X86_64_PC8:
1729 case R_X86_64_PC16:
70256ad8 1730 case R_X86_64_PC32:
d6ab8113 1731 case R_X86_64_PC64:
1b71fb54 1732 case R_X86_64_64:
248775ba 1733pointer:
710ab287 1734 if (h != NULL && info->executable)
c434dee6
AJ		 1735 {
1736 /* If this reloc is in a read-only section, we might
1737 need a copy reloc. We can't check reliably at this
1738 stage whether the section is read-only, as input
1739 sections have not yet been mapped to output sections.
1740 Tentatively set the flag for now, and correct in
1741 adjust_dynamic_symbol. */
f5385ebf 1742 h->non_got_ref = 1;
c434dee6
AJ		 1743
1744 /* We may need a .plt entry if the function this reloc
1745 refers to is in a shared lib. */
1746 h->plt.refcount += 1;
d6ab8113 1747 if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64)
f5385ebf 1748 h->pointer_equality_needed = 1;
c434dee6 1749 }
70256ad8
AJ		 1750
1751 /* If we are creating a shared library, and this is a reloc
1752 against a global symbol, or a non PC relative reloc
1753 against a local symbol, then we need to copy the reloc
1754 into the shared library. However, if we are linking with
1755 -Bsymbolic, we do not need to copy a reloc against a
1756 global symbol which is defined in an object we are
407443a3 1757 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ		 1758 this point we have not seen all the input files, so it is
1759 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ		 1760 later (it is never cleared). In case of a weak definition,
1761 DEF_REGULAR may be cleared later by a strong definition in
1762 a shared library. We account for that possibility below by
1763 storing information in the relocs_copied field of the hash
1764 table entry. A similar situation occurs when creating
1765 shared libraries and symbol visibility changes render the
1766 symbol local.
1767
1768 If on the other hand, we are creating an executable, we
1769 may need to keep relocations for symbols satisfied by a
1770 dynamic library if we manage to avoid copy relocs for the
0f88be7a 1771 symbol. */
c434dee6
AJ		 1772 if ((info->shared
1773 && (sec->flags & SEC_ALLOC) != 0
d8045f23 1774 && (! IS_X86_64_PCREL_TYPE (r_type)
c434dee6 1775 || (h != NULL
55255dae 1776 && (! SYMBOLIC_BIND (info, h)
c434dee6 1777 || h->root.type == bfd_link_hash_defweak
f5385ebf 1778 || !h->def_regular))))
d40d037c
AJ		 1779 || (ELIMINATE_COPY_RELOCS
1780 && !info->shared
c434dee6
AJ		 1781 && (sec->flags & SEC_ALLOC) != 0
1782 && h != NULL
1783 && (h->root.type == bfd_link_hash_defweak
0f88be7a 1784 || !h->def_regular)))
70256ad8 1785 {
e03a8ed8
L		 1786 struct elf_dyn_relocs *p;
1787 struct elf_dyn_relocs **head;
c434dee6
AJ		 1788
1789 /* We must copy these reloc types into the output file.
1790 Create a reloc section in dynobj and make room for
1791 this reloc. */
70256ad8
AJ		 1792 if (sreloc == NULL)
1793 {
c434dee6
AJ		 1794 if (htab->elf.dynobj == NULL)
1795 htab->elf.dynobj = abfd;
1796
83bac4b0 1797 sreloc = _bfd_elf_make_dynamic_reloc_section
82e96e07
L		 1798 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
1799 abfd, /*rela?*/ TRUE);
70256ad8 1800
70256ad8 1801 if (sreloc == NULL)
c2e61a4e 1802 return FALSE;
70256ad8
AJ		 1803 }
1804
c434dee6
AJ		 1805 /* If this is a global symbol, we count the number of
1806 relocations we need for this symbol. */
1807 if (h != NULL)
70256ad8 1808 {
351f65ca 1809 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
c434dee6
AJ		 1810 }
1811 else
1812 {
1813 /* Track dynamic relocs needed for local syms too.
1814 We really need local syms available to do this
1815 easily. Oh well. */
c434dee6 1816 asection *s;
87d72d41 1817 void **vpp;
87d72d41
AM		 1818
1819 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1820 abfd, r_symndx);
1821 if (isym == NULL)
1822 return FALSE;
1823
1824 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
c434dee6 1825 if (s == NULL)
87d72d41 1826 s = sec;
70256ad8 1827
e81d3500
DD		 1828 /* Beware of type punned pointers vs strict aliasing
1829 rules. */
1830 vpp = &(elf_section_data (s)->local_dynrel);
e03a8ed8 1831 head = (struct elf_dyn_relocs **)vpp;
c434dee6 1832 }
70256ad8 1833
c434dee6
AJ		 1834 p = *head;
1835 if (p == NULL || p->sec != sec)
1836 {
1837 bfd_size_type amt = sizeof *p;
d8045f23 1838
e03a8ed8 1839 p = ((struct elf_dyn_relocs *)
c434dee6 1840 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 1841 if (p == NULL)
c2e61a4e 1842 return FALSE;
c434dee6
AJ		 1843 p->next = *head;
1844 *head = p;
1845 p->sec = sec;
1846 p->count = 0;
1847 p->pc_count = 0;
70256ad8 1848 }
c434dee6
AJ		 1849
1850 p->count += 1;
d8045f23 1851 if (IS_X86_64_PCREL_TYPE (r_type))
c434dee6 1852 p->pc_count += 1;
70256ad8
AJ		 1853 }
1854 break;
fe4770f4
AJ		 1855
1856 /* This relocation describes the C++ object vtable hierarchy.
1857 Reconstruct it for later use during GC. */
1858 case R_X86_64_GNU_VTINHERIT:
c152c796 1859 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 1860 return FALSE;
fe4770f4
AJ		 1861 break;
1862
1863 /* This relocation describes which C++ vtable entries are actually
1864 used. Record for later use during GC. */
1865 case R_X86_64_GNU_VTENTRY:
d17e0c6e
JB		 1866 BFD_ASSERT (h != NULL);
1867 if (h != NULL
1868 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
c2e61a4e 1869 return FALSE;
fe4770f4 1870 break;
c434dee6
AJ		 1871
1872 default:
1873 break;
70256ad8
AJ		 1874 }
1875 }
1876
b34976b6 1877 return TRUE;
70256ad8
AJ		 1878}
1879
1880/* Return the section that should be marked against GC for a given
407443a3 1881 relocation. */
70256ad8
AJ		 1882
1883static asection *
351f65ca
L		 1884elf_x86_64_gc_mark_hook (asection *sec,
1885 struct bfd_link_info *info,
1886 Elf_Internal_Rela *rel,
1887 struct elf_link_hash_entry *h,
1888 Elf_Internal_Sym *sym)
70256ad8
AJ		 1889{
1890 if (h != NULL)
351f65ca 1891 switch (ELF32_R_TYPE (rel->r_info))
07adf181
AM		 1892 {
1893 case R_X86_64_GNU_VTINHERIT:
1894 case R_X86_64_GNU_VTENTRY:
1895 return NULL;
1896 }
1897
1898 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
70256ad8
AJ		 1899}
1900
407443a3 1901/* Update the got entry reference counts for the section being removed. */
70256ad8 1902
b34976b6 1903static bfd_boolean
351f65ca
L		 1904elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
1905 asection *sec,
1906 const Elf_Internal_Rela *relocs)
70256ad8 1907{
351f65ca 1908 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 1909 Elf_Internal_Shdr *symtab_hdr;
1910 struct elf_link_hash_entry **sym_hashes;
1911 bfd_signed_vma *local_got_refcounts;
1912 const Elf_Internal_Rela *rel, *relend;
c434dee6 1913
7dda2462
TG		 1914 if (info->relocatable)
1915 return TRUE;
1916
351f65ca 1917 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1918 if (htab == NULL)
1919 return FALSE;
1920
c434dee6 1921 elf_section_data (sec)->local_dynrel = NULL;
70256ad8 1922
0ffa91dd 1923 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8
AJ		 1924 sym_hashes = elf_sym_hashes (abfd);
1925 local_got_refcounts = elf_local_got_refcounts (abfd);
1926
351f65ca 1927 htab = elf_x86_64_hash_table (info);
70256ad8
AJ		 1928 relend = relocs + sec->reloc_count;
1929 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 1930 {
1931 unsigned long r_symndx;
1932 unsigned int r_type;
1933 struct elf_link_hash_entry *h = NULL;
70256ad8 1934
351f65ca 1935 r_symndx = htab->r_sym (rel->r_info);
26e41594
AM		 1936 if (r_symndx >= symtab_hdr->sh_info)
1937 {
26e41594 1938 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 1939 while (h->root.type == bfd_link_hash_indirect
1940 || h->root.type == bfd_link_hash_warning)
1941 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 1942 }
bb1cb422
L		 1943 else
1944 {
1945 /* A local symbol. */
1946 Elf_Internal_Sym *isym;
1947
1948 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1949 abfd, r_symndx);
1950
1951 /* Check relocation against local STT_GNU_IFUNC symbol. */
1952 if (isym != NULL
82e96e07 1953 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
bb1cb422 1954 {
351f65ca 1955 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
bb1cb422
L		 1956 if (h == NULL)
1957 abort ();
1958 }
1959 }
c434dee6 1960
3db2e7dd
L		 1961 if (h)
1962 {
1963 struct elf_x86_64_link_hash_entry *eh;
1964 struct elf_dyn_relocs **pp;
1965 struct elf_dyn_relocs *p;
1966
1967 eh = (struct elf_x86_64_link_hash_entry *) h;
1968
1969 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1970 if (p->sec == sec)
1971 {
1972 /* Everything must go for SEC. */
1973 *pp = p->next;
1974 break;
1975 }
1976 }
1977
351f65ca
L		 1978 r_type = ELF32_R_TYPE (rel->r_info);
1979 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1980 symtab_hdr, sym_hashes,
1981 &r_type, GOT_UNKNOWN,
1982 rel, relend, h, r_symndx))
142411ca
L		 1983 return FALSE;
1984
26e41594
AM		 1985 switch (r_type)
1986 {
1987 case R_X86_64_TLSLD:
4dfe6ac6
NC		 1988 if (htab->tls_ld_got.refcount > 0)
1989 htab->tls_ld_got.refcount -= 1;
26e41594 1990 break;
c434dee6 1991
26e41594 1992 case R_X86_64_TLSGD:
67a4f2b7
AO		 1993 case R_X86_64_GOTPC32_TLSDESC:
1994 case R_X86_64_TLSDESC_CALL:
26e41594
AM		 1995 case R_X86_64_GOTTPOFF:
1996 case R_X86_64_GOT32:
1997 case R_X86_64_GOTPCREL:
7b81dfbb
AJ		 1998 case R_X86_64_GOT64:
1999 case R_X86_64_GOTPCREL64:
2000 case R_X86_64_GOTPLT64:
26e41594
AM		 2001 if (h != NULL)
2002 {
7b81dfbb 2003 if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0)
eed180f8 2004 h->plt.refcount -= 1;
26e41594
AM		 2005 if (h->got.refcount > 0)
2006 h->got.refcount -= 1;
bb1cb422
L		 2007 if (h->type == STT_GNU_IFUNC)
2008 {
2009 if (h->plt.refcount > 0)
2010 h->plt.refcount -= 1;
2011 }
26e41594
AM		 2012 }
2013 else if (local_got_refcounts != NULL)
2014 {
2015 if (local_got_refcounts[r_symndx] > 0)
2016 local_got_refcounts[r_symndx] -= 1;
2017 }
2018 break;
c434dee6 2019
26e41594
AM		 2020 case R_X86_64_8:
2021 case R_X86_64_16:
2022 case R_X86_64_32:
2023 case R_X86_64_64:
2024 case R_X86_64_32S:
2025 case R_X86_64_PC8:
2026 case R_X86_64_PC16:
2027 case R_X86_64_PC32:
d6ab8113 2028 case R_X86_64_PC64:
3db2e7dd
L		 2029 if (info->shared
2030 && (h == NULL || h->type != STT_GNU_IFUNC))
26e41594
AM		 2031 break;
2032 /* Fall thru */
c434dee6 2033
26e41594 2034 case R_X86_64_PLT32:
7b81dfbb 2035 case R_X86_64_PLTOFF64:
26e41594
AM		 2036 if (h != NULL)
2037 {
2038 if (h->plt.refcount > 0)
2039 h->plt.refcount -= 1;
2040 }
2041 break;
70256ad8 2042
26e41594
AM		 2043 default:
2044 break;
2045 }
2046 }
70256ad8 2047
b34976b6 2048 return TRUE;
70256ad8
AJ		 2049}
2050
2051/* Adjust a symbol defined by a dynamic object and referenced by a
2052 regular object. The current definition is in some section of the
2053 dynamic object, but we're not including those sections. We have to
2054 change the definition to something the rest of the link can
407443a3 2055 understand. */
70256ad8 2056
b34976b6 2057static bfd_boolean
351f65ca
L		 2058elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2059 struct elf_link_hash_entry *h)
70256ad8 2060{
351f65ca 2061 struct elf_x86_64_link_hash_table *htab;
70256ad8 2062 asection *s;
5ca5bb35
L		 2063 struct elf_x86_64_link_hash_entry *eh;
2064 struct elf_dyn_relocs *p;
70256ad8 2065
cbe950e9
L		 2066 /* STT_GNU_IFUNC symbol must go through PLT. */
2067 if (h->type == STT_GNU_IFUNC)
2068 {
73bcf233
L		 2069 /* All local STT_GNU_IFUNC references must be treate as local
2070 calls via local PLT. */
5ca5bb35
L		 2071 if (h->ref_regular
2072 && SYMBOL_CALLS_LOCAL (info, h))
2073 {
73bcf233 2074 bfd_size_type pc_count = 0, count = 0;
5ca5bb35
L		 2075 struct elf_dyn_relocs **pp;
2076
2077 eh = (struct elf_x86_64_link_hash_entry *) h;
2078 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2079 {
2080 pc_count += p->pc_count;
2081 p->count -= p->pc_count;
2082 p->pc_count = 0;
73bcf233 2083 count += p->count;
5ca5bb35
L		 2084 if (p->count == 0)
2085 *pp = p->next;
2086 else
2087 pp = &p->next;
2088 }
2089
73bcf233 2090 if (pc_count || count)
5ca5bb35
L		 2091 {
2092 h->needs_plt = 1;
2093 h->plt.refcount += 1;
2094 h->non_got_ref = 1;
2095 }
2096 }
2097
cbe950e9
L		 2098 if (h->plt.refcount <= 0)
2099 {
2100 h->plt.offset = (bfd_vma) -1;
2101 h->needs_plt = 0;
2102 }
2103 return TRUE;
2104 }
2105
70256ad8
AJ		 2106 /* If this is a function, put it in the procedure linkage table. We
2107 will fill in the contents of the procedure linkage table later,
2108 when we know the address of the .got section. */
2109 if (h->type == STT_FUNC
f5385ebf 2110 || h->needs_plt)
70256ad8 2111 {
c434dee6 2112 if (h->plt.refcount <= 0
27482721
AJ		 2113 || SYMBOL_CALLS_LOCAL (info, h)
2114 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2115 && h->root.type == bfd_link_hash_undefweak))
70256ad8 2116 {
70256ad8
AJ		 2117 /* This case can occur if we saw a PLT32 reloc in an input
2118 file, but the symbol was never referred to by a dynamic
2119 object, or if all references were garbage collected. In
2120 such a case, we don't actually need to build a procedure
2121 linkage table, and we can just do a PC32 reloc instead. */
70256ad8 2122 h->plt.offset = (bfd_vma) -1;
f5385ebf 2123 h->needs_plt = 0;
70256ad8
AJ		 2124 }
2125
b34976b6 2126 return TRUE;
70256ad8 2127 }
bbd7ec4a 2128 else
c434dee6
AJ		 2129 /* It's possible that we incorrectly decided a .plt reloc was
2130 needed for an R_X86_64_PC32 reloc to a non-function sym in
2131 check_relocs. We can't decide accurately between function and
2132 non-function syms in check-relocs; Objects loaded later in
2133 the link may change h->type. So fix it now. */
bbd7ec4a 2134 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ		 2135
2136 /* If this is a weak symbol, and there is a real definition, the
2137 processor independent code will have arranged for us to see the
407443a3 2138 real definition first, and we can just use the same value. */
f6e332e6 2139 if (h->u.weakdef != NULL)
70256ad8 2140 {
f6e332e6
AM		 2141 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2142 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2143 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2144 h->root.u.def.value = h->u.weakdef->root.u.def.value;
d40d037c 2145 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 2146 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 2147 return TRUE;
70256ad8
AJ		 2148 }
2149
2150 /* This is a reference to a symbol defined by a dynamic object which
407443a3 2151 is not a function. */
70256ad8
AJ		 2152
2153 /* If we are creating a shared library, we must presume that the
2154 only references to the symbol are via the global offset table.
2155 For such cases we need not do anything here; the relocations will
407443a3 2156 be handled correctly by relocate_section. */
70256ad8 2157 if (info->shared)
b34976b6 2158 return TRUE;
70256ad8
AJ		 2159
2160 /* If there are no references to this symbol that do not use the
2161 GOT, we don't need to generate a copy reloc. */
f5385ebf 2162 if (!h->non_got_ref)
b34976b6 2163 return TRUE;
70256ad8 2164
c434dee6
AJ		 2165 /* If -z nocopyreloc was given, we won't generate them either. */
2166 if (info->nocopyreloc)
2167 {
f5385ebf 2168 h->non_got_ref = 0;
b34976b6 2169 return TRUE;
c434dee6
AJ		 2170 }
2171
d40d037c 2172 if (ELIMINATE_COPY_RELOCS)
c434dee6 2173 {
351f65ca 2174 eh = (struct elf_x86_64_link_hash_entry *) h;
d40d037c
AJ		 2175 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2176 {
2177 s = p->sec->output_section;
2178 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2179 break;
2180 }
2181
2182 /* If we didn't find any dynamic relocs in read-only sections, then
2183 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2184 if (p == NULL)
2185 {
f5385ebf 2186 h->non_got_ref = 0;
d40d037c
AJ		 2187 return TRUE;
2188 }
c434dee6
AJ		 2189 }
2190
70256ad8 2191 /* We must allocate the symbol in our .dynbss section, which will
407443a3 2192 become part of the .bss section of the executable. There will be
70256ad8
AJ		 2193 an entry for this symbol in the .dynsym section. The dynamic
2194 object will contain position independent code, so all references
2195 from the dynamic object to this symbol will go through the global
2196 offset table. The dynamic linker will use the .dynsym entry to
2197 determine the address it must put in the global offset table, so
2198 both the dynamic object and the regular object will refer to the
2199 same memory location for the variable. */
2200
351f65ca 2201 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2202 if (htab == NULL)
2203 return FALSE;
70256ad8
AJ		 2204
2205 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2206 to copy the initial value out of the dynamic object and into the
cedb70c5 2207 runtime process image. */
1d7e9d18 2208 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
70256ad8 2209 {
351f65ca
L		 2210 const struct elf_backend_data *bed;
2211 bed = get_elf_backend_data (info->output_bfd);
2212 htab->srelbss->size += bed->s->sizeof_rela;
f5385ebf 2213 h->needs_copy = 1;
70256ad8
AJ		 2214 }
2215
c434dee6 2216 s = htab->sdynbss;
70256ad8 2217
027297b7 2218 return _bfd_elf_adjust_dynamic_copy (h, s);
70256ad8
AJ		 2219}
2220
c434dee6
AJ		 2221/* Allocate space in .plt, .got and associated reloc sections for
2222 dynamic relocs. */
2223
b34976b6 2224static bfd_boolean
351f65ca 2225elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 2226{
2227 struct bfd_link_info *info;
351f65ca
L		 2228 struct elf_x86_64_link_hash_table *htab;
2229 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2230 struct elf_dyn_relocs *p;
351f65ca 2231 const struct elf_backend_data *bed;
eed180f8 2232 unsigned int plt_entry_size;
c434dee6 2233
e92d460e 2234 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2235 return TRUE;
c434dee6 2236
351f65ca 2237 eh = (struct elf_x86_64_link_hash_entry *) h;
e92d460e 2238
c434dee6 2239 info = (struct bfd_link_info *) inf;
351f65ca 2240 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2241 if (htab == NULL)
2242 return FALSE;
351f65ca 2243 bed = get_elf_backend_data (info->output_bfd);
eed180f8 2244 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
c434dee6 2245
cbe950e9
L		 2246 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2247 here if it is defined and referenced in a non-shared object. */
2248 if (h->type == STT_GNU_IFUNC
2249 && h->def_regular)
e03a8ed8
L		 2250 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2251 &eh->dyn_relocs,
eed180f8 2252 plt_entry_size,
e03a8ed8 2253 GOT_ENTRY_SIZE);
cbe950e9
L		 2254 else if (htab->elf.dynamic_sections_created
2255 && h->plt.refcount > 0)
c434dee6
AJ		 2256 {
2257 /* Make sure this symbol is output as a dynamic symbol.
2258 Undefined weak syms won't yet be marked as dynamic. */
2259 if (h->dynindx == -1
f5385ebf 2260 && !h->forced_local)
c434dee6 2261 {
c152c796 2262 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2263 return FALSE;
c434dee6
AJ		 2264 }
2265
27482721
AJ		 2266 if (info->shared
2267 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6 2268 {
6de2ae4a 2269 asection *s = htab->elf.splt;
c434dee6
AJ		 2270
2271 /* If this is the first .plt entry, make room for the special
2272 first entry. */
eea6121a 2273 if (s->size == 0)
eed180f8 2274 s->size += plt_entry_size;
c434dee6 2275
eea6121a 2276 h->plt.offset = s->size;
c434dee6
AJ		 2277
2278 /* If this symbol is not defined in a regular file, and we are
2279 not generating a shared library, then set the symbol to this
2280 location in the .plt. This is required to make function
2281 pointers compare as equal between the normal executable and
2282 the shared library. */
2283 if (! info->shared
f5385ebf 2284 && !h->def_regular)
c434dee6
AJ		 2285 {
2286 h->root.u.def.section = s;
2287 h->root.u.def.value = h->plt.offset;
2288 }
2289
2290 /* Make room for this entry. */
eed180f8 2291 s->size += plt_entry_size;
c434dee6
AJ		 2292
2293 /* We also need to make an entry in the .got.plt section, which
2294 will be placed in the .got section by the linker script. */
6de2ae4a 2295 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
c434dee6
AJ		 2296
2297 /* We also need to make an entry in the .rela.plt section. */
351f65ca 2298 htab->elf.srelplt->size += bed->s->sizeof_rela;
6de2ae4a 2299 htab->elf.srelplt->reloc_count++;
c434dee6
AJ		 2300 }
2301 else
2302 {
2303 h->plt.offset = (bfd_vma) -1;
f5385ebf 2304 h->needs_plt = 0;
c434dee6
AJ		 2305 }
2306 }
2307 else
2308 {
2309 h->plt.offset = (bfd_vma) -1;
f5385ebf 2310 h->needs_plt = 0;
c434dee6
AJ		 2311 }
2312
67a4f2b7
AO		 2313 eh->tlsdesc_got = (bfd_vma) -1;
2314
bffbf940
JJ		 2315 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2316 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2317 if (h->got.refcount > 0
1d85728f 2318 && info->executable
bffbf940 2319 && h->dynindx == -1
351f65ca 2320 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
d8045f23
NC		 2321 {
2322 h->got.offset = (bfd_vma) -1;
2323 }
bffbf940 2324 else if (h->got.refcount > 0)
c434dee6
AJ		 2325 {
2326 asection *s;
b34976b6 2327 bfd_boolean dyn;
351f65ca 2328 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ		 2329
2330 /* Make sure this symbol is output as a dynamic symbol.
2331 Undefined weak syms won't yet be marked as dynamic. */
2332 if (h->dynindx == -1
f5385ebf 2333 && !h->forced_local)
c434dee6 2334 {
c152c796 2335 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2336 return FALSE;
c434dee6
AJ		 2337 }
2338
67a4f2b7
AO		 2339 if (GOT_TLS_GDESC_P (tls_type))
2340 {
6de2ae4a 2341 eh->tlsdesc_got = htab->elf.sgotplt->size
351f65ca 2342 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2343 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 2344 h->got.offset = (bfd_vma) -2;
2345 }
2346 if (! GOT_TLS_GDESC_P (tls_type)
2347 || GOT_TLS_GD_P (tls_type))
2348 {
6de2ae4a 2349 s = htab->elf.sgot;
67a4f2b7
AO		 2350 h->got.offset = s->size;
2351 s->size += GOT_ENTRY_SIZE;
2352 if (GOT_TLS_GD_P (tls_type))
2353 s->size += GOT_ENTRY_SIZE;
2354 }
c434dee6 2355 dyn = htab->elf.dynamic_sections_created;
bffbf940
JJ		 2356 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2357 and two if global.
2358 R_X86_64_GOTTPOFF needs one dynamic relocation. */
67a4f2b7 2359 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
bffbf940 2360 || tls_type == GOT_TLS_IE)
351f65ca 2361 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7 2362 else if (GOT_TLS_GD_P (tls_type))
351f65ca 2363 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
67a4f2b7
AO		 2364 else if (! GOT_TLS_GDESC_P (tls_type)
2365 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2366 || h->root.type != bfd_link_hash_undefweak)
27482721
AJ		 2367 && (info->shared
2368 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
351f65ca 2369 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2370 if (GOT_TLS_GDESC_P (tls_type))
2371 {
351f65ca 2372 htab->elf.srelplt->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2373 htab->tlsdesc_plt = (bfd_vma) -1;
2374 }
c434dee6
AJ		 2375 }
2376 else
2377 h->got.offset = (bfd_vma) -1;
2378
c434dee6 2379 if (eh->dyn_relocs == NULL)
b34976b6 2380 return TRUE;
c434dee6
AJ		 2381
2382 /* In the shared -Bsymbolic case, discard space allocated for
2383 dynamic pc-relative relocs against symbols which turn out to be
2384 defined in regular objects. For the normal shared case, discard
2385 space for pc-relative relocs that have become local due to symbol
2386 visibility changes. */
2387
2388 if (info->shared)
2389 {
27482721
AJ		 2390 /* Relocs that use pc_count are those that appear on a call
2391 insn, or certain REL relocs that can generated via assembly.
2392 We want calls to protected symbols to resolve directly to the
2393 function rather than going via the plt. If people want
2394 function pointer comparisons to work as expected then they
2395 should avoid writing weird assembly. */
2396 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6 2397 {
e03a8ed8 2398 struct elf_dyn_relocs **pp;
c434dee6
AJ		 2399
2400 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2401 {
2402 p->count -= p->pc_count;
2403 p->pc_count = 0;
2404 if (p->count == 0)
2405 *pp = p->next;
2406 else
2407 pp = &p->next;
2408 }
2409 }
4e795f50
AM		 2410
2411 /* Also discard relocs on undefined weak syms with non-default
2412 visibility. */
22d606e9 2413 if (eh->dyn_relocs != NULL
4e795f50 2414 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM		 2415 {
2416 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2417 eh->dyn_relocs = NULL;
2418
2419 /* Make sure undefined weak symbols are output as a dynamic
2420 symbol in PIEs. */
2421 else if (h->dynindx == -1
d8045f23
NC		 2422 && ! h->forced_local
2423 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2424 return FALSE;
22d606e9 2425 }
cbe950e9 2426
d8045f23 2427 }
d40d037c 2428 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ		 2429 {
2430 /* For the non-shared case, discard space for relocs against
2431 symbols which turn out to need copy relocs or are not
2432 dynamic. */
2433
f5385ebf
AM		 2434 if (!h->non_got_ref
2435 && ((h->def_dynamic
2436 && !h->def_regular)
c434dee6
AJ		 2437 || (htab->elf.dynamic_sections_created
2438 && (h->root.type == bfd_link_hash_undefweak
2439 || h->root.type == bfd_link_hash_undefined))))
2440 {
2441 /* Make sure this symbol is output as a dynamic symbol.
2442 Undefined weak syms won't yet be marked as dynamic. */
2443 if (h->dynindx == -1
d8045f23
NC		 2444 && ! h->forced_local
2445 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2446 return FALSE;
c434dee6
AJ		 2447
2448 /* If that succeeded, we know we'll be keeping all the
2449 relocs. */
2450 if (h->dynindx != -1)
2451 goto keep;
2452 }
2453
2454 eh->dyn_relocs = NULL;
2455
2456 keep: ;
2457 }
2458
2459 /* Finally, allocate space. */
2460 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2461 {
e7c33416
NC		 2462 asection * sreloc;
2463
cbe950e9 2464 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2465
2466 BFD_ASSERT (sreloc != NULL);
2467
351f65ca 2468 sreloc->size += p->count * bed->s->sizeof_rela;
c434dee6
AJ		 2469 }
2470
b34976b6 2471 return TRUE;
c434dee6
AJ		 2472}
2473
c25bc9fc
L		 2474/* Allocate space in .plt, .got and associated reloc sections for
2475 local dynamic relocs. */
2476
2477static bfd_boolean
351f65ca 2478elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
c25bc9fc
L		 2479{
2480 struct elf_link_hash_entry *h
2481 = (struct elf_link_hash_entry *) *slot;
2482
2483 if (h->type != STT_GNU_IFUNC
2484 || !h->def_regular
2485 || !h->ref_regular
2486 || !h->forced_local
2487 || h->root.type != bfd_link_hash_defined)
2488 abort ();
2489
351f65ca 2490 return elf_x86_64_allocate_dynrelocs (h, inf);
c25bc9fc
L		 2491}
2492
c434dee6
AJ		 2493/* Find any dynamic relocs that apply to read-only sections. */
2494
b34976b6 2495static bfd_boolean
351f65ca
L		 2496elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2497 void * inf)
c434dee6 2498{
351f65ca 2499 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2500 struct elf_dyn_relocs *p;
c434dee6 2501
aa715242
L		 2502 /* Skip local IFUNC symbols. */
2503 if (h->forced_local && h->type == STT_GNU_IFUNC)
2504 return TRUE;
2505
351f65ca 2506 eh = (struct elf_x86_64_link_hash_entry *) h;
c434dee6
AJ		 2507 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2508 {
2509 asection *s = p->sec->output_section;
2510
2511 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2512 {
2513 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2514
2515 info->flags |= DF_TEXTREL;
2516
b70321a2
L		 2517 if (info->warn_shared_textrel && info->shared)
2518 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2519 p->sec->owner, h->root.root.string,
2520 p->sec);
2521
c434dee6 2522 /* Not an error, just cut short the traversal. */
b34976b6 2523 return FALSE;
c434dee6
AJ		 2524 }
2525 }
b34976b6 2526 return TRUE;
c434dee6
AJ		 2527}
2528
daa67607
L		 2529/* Convert
2530 mov foo@GOTPCREL(%rip), %reg
2531 to
2532 lea foo(%rip), %reg
2533 with the local symbol, foo. */
2534
2535static bfd_boolean
2536elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec,
2537 struct bfd_link_info *link_info)
2538{
2539 Elf_Internal_Shdr *symtab_hdr;
2540 Elf_Internal_Rela *internal_relocs;
2541 Elf_Internal_Rela *irel, *irelend;
2542 bfd_byte *contents;
2543 struct elf_x86_64_link_hash_table *htab;
2544 bfd_boolean changed_contents;
2545 bfd_boolean changed_relocs;
2546 bfd_signed_vma *local_got_refcounts;
2547
2548 /* Don't even try to convert non-ELF outputs. */
2549 if (!is_elf_hash_table (link_info->hash))
2550 return FALSE;
2551
fbdc86d9 2552 /* Nothing to do if there are no codes, no relocations or no output. */
daa67607 2553 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
fbdc86d9
L		 2554 || sec->reloc_count == 0
2555 || discarded_section (sec))
daa67607
L		 2556 return TRUE;
2557
2558 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2559
2560 /* Load the relocations for this section. */
2561 internal_relocs = (_bfd_elf_link_read_relocs
2562 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2563 link_info->keep_memory));
2564 if (internal_relocs == NULL)
2565 return FALSE;
2566
2567 htab = elf_x86_64_hash_table (link_info);
2568 changed_contents = FALSE;
2569 changed_relocs = FALSE;
2570 local_got_refcounts = elf_local_got_refcounts (abfd);
2571
2572 /* Get the section contents. */
2573 if (elf_section_data (sec)->this_hdr.contents != NULL)
2574 contents = elf_section_data (sec)->this_hdr.contents;
2575 else
2576 {
2577 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2578 goto error_return;
2579 }
2580
2581 irelend = internal_relocs + sec->reloc_count;
2582 for (irel = internal_relocs; irel < irelend; irel++)
2583 {
2584 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2585 unsigned int r_symndx = htab->r_sym (irel->r_info);
2586 unsigned int indx;
2587 struct elf_link_hash_entry *h;
2588
2589 if (r_type != R_X86_64_GOTPCREL)
2590 continue;
2591
2592 /* Get the symbol referred to by the reloc. */
2593 if (r_symndx < symtab_hdr->sh_info)
2594 {
2595 Elf_Internal_Sym *isym;
2596
2597 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2598 abfd, r_symndx);
2599
2600 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2601 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2602 && bfd_get_8 (input_bfd,
2603 contents + irel->r_offset - 2) == 0x8b)
2604 {
2605 bfd_put_8 (output_bfd, 0x8d,
2606 contents + irel->r_offset - 2);
2607 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2608 if (local_got_refcounts != NULL
2609 && local_got_refcounts[r_symndx] > 0)
2610 local_got_refcounts[r_symndx] -= 1;
2611 changed_contents = TRUE;
2612 changed_relocs = TRUE;
2613 }
2614 continue;
2615 }
2616
2617 indx = r_symndx - symtab_hdr->sh_info;
2618 h = elf_sym_hashes (abfd)[indx];
2619 BFD_ASSERT (h != NULL);
2620
2621 while (h->root.type == bfd_link_hash_indirect
2622 || h->root.type == bfd_link_hash_warning)
2623 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2624
3f65f599
L		 2625 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2626 avoid optimizing _DYNAMIC since ld.so may use its link-time
2627 address. */
daa67607
L		 2628 if (h->def_regular
2629 && h->type != STT_GNU_IFUNC
9637f6ef 2630 && h != htab->elf.hdynamic
daa67607
L		 2631 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2632 && bfd_get_8 (input_bfd,
2633 contents + irel->r_offset - 2) == 0x8b)
2634 {
2635 bfd_put_8 (output_bfd, 0x8d,
2636 contents + irel->r_offset - 2);
2637 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2638 if (h->got.refcount > 0)
2639 h->got.refcount -= 1;
2640 changed_contents = TRUE;
2641 changed_relocs = TRUE;
2642 }
2643 }
2644
2645 if (contents != NULL
2646 && elf_section_data (sec)->this_hdr.contents != contents)
2647 {
2648 if (!changed_contents && !link_info->keep_memory)
2649 free (contents);
2650 else
2651 {
2652 /* Cache the section contents for elf_link_input_bfd. */
2653 elf_section_data (sec)->this_hdr.contents = contents;
2654 }
2655 }
2656
2657 if (elf_section_data (sec)->relocs != internal_relocs)
2658 {
2659 if (!changed_relocs)
2660 free (internal_relocs);
2661 else
2662 elf_section_data (sec)->relocs = internal_relocs;
2663 }
2664
2665 return TRUE;
2666
2667 error_return:
2668 if (contents != NULL
2669 && elf_section_data (sec)->this_hdr.contents != contents)
2670 free (contents);
2671 if (internal_relocs != NULL
2672 && elf_section_data (sec)->relocs != internal_relocs)
2673 free (internal_relocs);
2674 return FALSE;
2675}
2676
70256ad8
AJ		 2677/* Set the sizes of the dynamic sections. */
2678
b34976b6 2679static bfd_boolean
351f65ca
L		 2680elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2681 struct bfd_link_info *info)
70256ad8 2682{
351f65ca 2683 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 2684 bfd *dynobj;
2685 asection *s;
b34976b6 2686 bfd_boolean relocs;
c434dee6 2687 bfd *ibfd;
351f65ca 2688 const struct elf_backend_data *bed;
70256ad8 2689
351f65ca 2690 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2691 if (htab == NULL)
2692 return FALSE;
351f65ca 2693 bed = get_elf_backend_data (output_bfd);
4dfe6ac6 2694
c434dee6
AJ		 2695 dynobj = htab->elf.dynobj;
2696 if (dynobj == NULL)
2697 abort ();
70256ad8 2698
c434dee6 2699 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 2700 {
2701 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 2702 if (info->executable)
70256ad8 2703 {
3d4d4302 2704 s = bfd_get_linker_section (dynobj, ".interp");
c434dee6
AJ		 2705 if (s == NULL)
2706 abort ();
351f65ca
L		 2707 s->size = htab->dynamic_interpreter_size;
2708 s->contents = (unsigned char *) htab->dynamic_interpreter;
70256ad8
AJ		 2709 }
2710 }
70256ad8 2711
c434dee6
AJ		 2712 /* Set up .got offsets for local syms, and space for local dynamic
2713 relocs. */
2714 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
70256ad8 2715 {
c434dee6
AJ		 2716 bfd_signed_vma *local_got;
2717 bfd_signed_vma *end_local_got;
bffbf940 2718 char *local_tls_type;
67a4f2b7 2719 bfd_vma *local_tlsdesc_gotent;
c434dee6
AJ		 2720 bfd_size_type locsymcount;
2721 Elf_Internal_Shdr *symtab_hdr;
2722 asection *srel;
70256ad8 2723
0ffa91dd 2724 if (! is_x86_64_elf (ibfd))
70256ad8
AJ		 2725 continue;
2726
c434dee6 2727 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 2728 {
e03a8ed8 2729 struct elf_dyn_relocs *p;
c434dee6 2730
daa67607
L		 2731 if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info))
2732 return FALSE;
2733
e03a8ed8 2734 for (p = (struct elf_dyn_relocs *)
e81d3500 2735 (elf_section_data (s)->local_dynrel);
c434dee6
AJ		 2736 p != NULL;
2737 p = p->next)
70256ad8 2738 {
c434dee6
AJ		 2739 if (!bfd_is_abs_section (p->sec)
2740 && bfd_is_abs_section (p->sec->output_section))
2741 {
2742 /* Input section has been discarded, either because
2743 it is a copy of a linkonce section or due to
2744 linker script /DISCARD/, so we'll be discarding
2745 the relocs too. */
2746 }
2747 else if (p->count != 0)
2748 {
2749 srel = elf_section_data (p->sec)->sreloc;
351f65ca 2750 srel->size += p->count * bed->s->sizeof_rela;
4b819e1f
L		 2751 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2752 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 2753 {
2754 info->flags |= DF_TEXTREL;
2755 if (info->warn_shared_textrel && info->shared)
2756 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2757 p->sec->owner, p->sec);
b70321a2 2758 }
c434dee6 2759 }
70256ad8
AJ		 2760 }
2761 }
c434dee6
AJ		 2762
2763 local_got = elf_local_got_refcounts (ibfd);
2764 if (!local_got)
2765 continue;
2766
0ffa91dd 2767 symtab_hdr = &elf_symtab_hdr (ibfd);
c434dee6
AJ		 2768 locsymcount = symtab_hdr->sh_info;
2769 end_local_got = local_got + locsymcount;
351f65ca
L		 2770 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
2771 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 2772 s = htab->elf.sgot;
2773 srel = htab->elf.srelgot;
67a4f2b7
AO		 2774 for (; local_got < end_local_got;
2775 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
70256ad8 2776 {
67a4f2b7 2777 *local_tlsdesc_gotent = (bfd_vma) -1;
c434dee6 2778 if (*local_got > 0)
70256ad8 2779 {
67a4f2b7
AO		 2780 if (GOT_TLS_GDESC_P (*local_tls_type))
2781 {
6de2ae4a 2782 *local_tlsdesc_gotent = htab->elf.sgotplt->size
351f65ca 2783 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2784 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 2785 *local_got = (bfd_vma) -2;
2786 }
2787 if (! GOT_TLS_GDESC_P (*local_tls_type)
2788 || GOT_TLS_GD_P (*local_tls_type))
2789 {
2790 *local_got = s->size;
2791 s->size += GOT_ENTRY_SIZE;
2792 if (GOT_TLS_GD_P (*local_tls_type))
2793 s->size += GOT_ENTRY_SIZE;
2794 }
bffbf940 2795 if (info->shared
67a4f2b7 2796 || GOT_TLS_GD_ANY_P (*local_tls_type)
bffbf940 2797 || *local_tls_type == GOT_TLS_IE)
67a4f2b7
AO		 2798 {
2799 if (GOT_TLS_GDESC_P (*local_tls_type))
2800 {
6de2ae4a 2801 htab->elf.srelplt->size
351f65ca 2802 += bed->s->sizeof_rela;
67a4f2b7
AO		 2803 htab->tlsdesc_plt = (bfd_vma) -1;
2804 }
2805 if (! GOT_TLS_GDESC_P (*local_tls_type)
2806 || GOT_TLS_GD_P (*local_tls_type))
351f65ca 2807 srel->size += bed->s->sizeof_rela;
67a4f2b7 2808 }
70256ad8
AJ		 2809 }
2810 else
c434dee6
AJ		 2811 *local_got = (bfd_vma) -1;
2812 }
2813 }
70256ad8 2814
bffbf940
JJ		 2815 if (htab->tls_ld_got.refcount > 0)
2816 {
2817 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2818 relocs. */
6de2ae4a
L		 2819 htab->tls_ld_got.offset = htab->elf.sgot->size;
2820 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
351f65ca 2821 htab->elf.srelgot->size += bed->s->sizeof_rela;
bffbf940
JJ		 2822 }
2823 else
2824 htab->tls_ld_got.offset = -1;
2825
c434dee6
AJ		 2826 /* Allocate global sym .plt and .got entries, and space for global
2827 sym dynamic relocs. */
351f65ca 2828 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
eb4ff4d6 2829 info);
c434dee6 2830
c25bc9fc
L		 2831 /* Allocate .plt and .got entries, and space for local symbols. */
2832 htab_traverse (htab->loc_hash_table,
351f65ca 2833 elf_x86_64_allocate_local_dynrelocs,
c25bc9fc
L		 2834 info);
2835
67a4f2b7
AO		 2836 /* For every jump slot reserved in the sgotplt, reloc_count is
2837 incremented. However, when we reserve space for TLS descriptors,
2838 it's not incremented, so in order to compute the space reserved
2839 for them, it suffices to multiply the reloc count by the jump
e1f98742
L		 2840 slot size.
2841
2842 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2843 so that R_X86_64_IRELATIVE entries come last. */
6de2ae4a 2844 if (htab->elf.srelplt)
e1f98742
L		 2845 {
2846 htab->sgotplt_jump_table_size
2847 = elf_x86_64_compute_jump_table_size (htab);
2848 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2849 }
2850 else if (htab->elf.irelplt)
2851 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
67a4f2b7
AO		 2852
2853 if (htab->tlsdesc_plt)
2854 {
2855 /* If we're not using lazy TLS relocations, don't generate the
2856 PLT and GOT entries they require. */
2857 if ((info->flags & DF_BIND_NOW))
2858 htab->tlsdesc_plt = 0;
2859 else
2860 {
6de2ae4a
L		 2861 htab->tlsdesc_got = htab->elf.sgot->size;
2862 htab->elf.sgot->size += GOT_ENTRY_SIZE;
67a4f2b7
AO		 2863 /* Reserve room for the initial entry.
2864 FIXME: we could probably do away with it in this case. */
6de2ae4a 2865 if (htab->elf.splt->size == 0)
eed180f8 2866 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
6de2ae4a 2867 htab->tlsdesc_plt = htab->elf.splt->size;
eed180f8 2868 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
67a4f2b7
AO		 2869 }
2870 }
2871
a7b16ceb
L		 2872 if (htab->elf.sgotplt)
2873 {
2874 /* Don't allocate .got.plt section if there are no GOT nor PLT
eed180f8 2875 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
9d4b2dba
L		 2876 if ((htab->elf.hgot == NULL
2877 || !htab->elf.hgot->ref_regular_nonweak)
e28df02b
L		 2878 && (htab->elf.sgotplt->size
2879 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 2880 && (htab->elf.splt == NULL
2881 || htab->elf.splt->size == 0)
2882 && (htab->elf.sgot == NULL
2883 || htab->elf.sgot->size == 0)
2884 && (htab->elf.iplt == NULL
2885 || htab->elf.iplt->size == 0)
2886 && (htab->elf.igotplt == NULL
2887 || htab->elf.igotplt->size == 0))
2888 htab->elf.sgotplt->size = 0;
2889 }
2890
9a2a56cc
AM		 2891 if (htab->plt_eh_frame != NULL
2892 && htab->elf.splt != NULL
2893 && htab->elf.splt->size != 0
2894 && !bfd_is_abs_section (htab->elf.splt->output_section)
2895 && _bfd_elf_eh_frame_present (info))
2896 {
2897 const struct elf_x86_64_backend_data *arch_data
2898 = (const struct elf_x86_64_backend_data *) bed->arch_data;
2899 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
2900 }
2901
c434dee6
AJ		 2902 /* We now have determined the sizes of the various dynamic sections.
2903 Allocate memory for them. */
b34976b6 2904 relocs = FALSE;
c434dee6
AJ		 2905 for (s = dynobj->sections; s != NULL; s = s->next)
2906 {
2907 if ((s->flags & SEC_LINKER_CREATED) == 0)
2908 continue;
2909
6de2ae4a
L		 2910 if (s == htab->elf.splt
2911 || s == htab->elf.sgot
2912 || s == htab->elf.sgotplt
2913 || s == htab->elf.iplt
2914 || s == htab->elf.igotplt
9a2a56cc 2915 || s == htab->plt_eh_frame
75ff4589 2916 || s == htab->sdynbss)
c434dee6
AJ		 2917 {
2918 /* Strip this section if we don't need it; see the
2919 comment below. */
2920 }
0112cd26 2921 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
c434dee6 2922 {
6de2ae4a 2923 if (s->size != 0 && s != htab->elf.srelplt)
b34976b6 2924 relocs = TRUE;
c434dee6
AJ		 2925
2926 /* We use the reloc_count field as a counter if we need
2927 to copy relocs into the output file. */
6de2ae4a 2928 if (s != htab->elf.srelplt)
67a4f2b7 2929 s->reloc_count = 0;
70256ad8 2930 }
c434dee6 2931 else
70256ad8
AJ		 2932 {
2933 /* It's not one of our sections, so don't allocate space. */
2934 continue;
2935 }
2936
eea6121a 2937 if (s->size == 0)
70256ad8 2938 {
c434dee6
AJ		 2939 /* If we don't need this section, strip it from the
2940 output file. This is mostly to handle .rela.bss and
2941 .rela.plt. We must create both sections in
2942 create_dynamic_sections, because they must be created
2943 before the linker maps input sections to output
2944 sections. The linker does that before
2945 adjust_dynamic_symbol is called, and it is that
2946 function which decides whether anything needs to go
2947 into these sections. */
2948
8423293d 2949 s->flags |= SEC_EXCLUDE;
70256ad8
AJ		 2950 continue;
2951 }
2952
c456f082
AM		 2953 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2954 continue;
2955
70256ad8
AJ		 2956 /* Allocate memory for the section contents. We use bfd_zalloc
2957 here in case unused entries are not reclaimed before the
2958 section's contents are written out. This should not happen,
2959 but this way if it does, we get a R_X86_64_NONE reloc instead
2960 of garbage. */
eea6121a 2961 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
c434dee6 2962 if (s->contents == NULL)
b34976b6 2963 return FALSE;
70256ad8
AJ		 2964 }
2965
e41b3a13 2966 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 2967 && htab->plt_eh_frame->contents != NULL)
2968 {
2969 const struct elf_x86_64_backend_data *arch_data
2970 = (const struct elf_x86_64_backend_data *) bed->arch_data;
2971
2972 memcpy (htab->plt_eh_frame->contents,
2973 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
2974 bfd_put_32 (dynobj, htab->elf.splt->size,
2975 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2976 }
e41b3a13 2977
c434dee6 2978 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 2979 {
2980 /* Add some entries to the .dynamic section. We fill in the
351f65ca 2981 values later, in elf_x86_64_finish_dynamic_sections, but we
70256ad8 2982 must add the entries now so that we get the correct size for
407443a3 2983 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 2984 dynamic linker and used by the debugger. */
dc810e39 2985#define add_dynamic_entry(TAG, VAL) \
5a580b3a 2986 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 2987
36af4a4e 2988 if (info->executable)
70256ad8 2989 {
dc810e39 2990 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2991 return FALSE;
70256ad8
AJ		 2992 }
2993
6de2ae4a 2994 if (htab->elf.splt->size != 0)
70256ad8 2995 {
dc810e39
AM		 2996 if (!add_dynamic_entry (DT_PLTGOT, 0)
2997 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2998 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2999 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 3000 return FALSE;
67a4f2b7
AO		 3001
3002 if (htab->tlsdesc_plt
3003 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3004 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3005 return FALSE;
70256ad8
AJ		 3006 }
3007
3008 if (relocs)
3009 {
dc810e39
AM		 3010 if (!add_dynamic_entry (DT_RELA, 0)
3011 || !add_dynamic_entry (DT_RELASZ, 0)
351f65ca 3012 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
b34976b6 3013 return FALSE;
70256ad8 3014
c434dee6
AJ		 3015 /* If any dynamic relocs apply to a read-only section,
3016 then we need a DT_TEXTREL entry. */
3017 if ((info->flags & DF_TEXTREL) == 0)
eed180f8 3018 elf_link_hash_traverse (&htab->elf,
351f65ca 3019 elf_x86_64_readonly_dynrelocs,
eb4ff4d6 3020 info);
c434dee6
AJ		 3021
3022 if ((info->flags & DF_TEXTREL) != 0)
3023 {
3024 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3025 return FALSE;
c434dee6 3026 }
70256ad8
AJ		 3027 }
3028 }
dc810e39 3029#undef add_dynamic_entry
70256ad8 3030
b34976b6 3031 return TRUE;
70256ad8
AJ		 3032}
3033
67a4f2b7 3034static bfd_boolean
351f65ca
L		 3035elf_x86_64_always_size_sections (bfd *output_bfd,
3036 struct bfd_link_info *info)
67a4f2b7
AO		 3037{
3038 asection *tls_sec = elf_hash_table (info)->tls_sec;
3039
3040 if (tls_sec)
3041 {
3042 struct elf_link_hash_entry *tlsbase;
3043
3044 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3045 "_TLS_MODULE_BASE_",
3046 FALSE, FALSE, FALSE);
3047
3048 if (tlsbase && tlsbase->type == STT_TLS)
3049 {
351f65ca 3050 struct elf_x86_64_link_hash_table *htab;
67a4f2b7
AO		 3051 struct bfd_link_hash_entry *bh = NULL;
3052 const struct elf_backend_data *bed
3053 = get_elf_backend_data (output_bfd);
3054
351f65ca 3055 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3056 if (htab == NULL)
3057 return FALSE;
3058
67a4f2b7
AO		 3059 if (!(_bfd_generic_link_add_one_symbol
3060 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3061 tls_sec, 0, NULL, FALSE,
3062 bed->collect, &bh)))
3063 return FALSE;
9f03412a 3064
4dfe6ac6 3065 htab->tls_module_base = bh;
9f03412a 3066
67a4f2b7
AO		 3067 tlsbase = (struct elf_link_hash_entry *)bh;
3068 tlsbase->def_regular = 1;
3069 tlsbase->other = STV_HIDDEN;
3070 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3071 }
3072 }
3073
3074 return TRUE;
3075}
3076
9f03412a
AO		 3077/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3078 executables. Rather than setting it to the beginning of the TLS
3079 section, we have to set it to the end. This function may be called
3080 multiple times, it is idempotent. */
3081
3082static void
351f65ca 3083elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3084{
351f65ca 3085 struct elf_x86_64_link_hash_table *htab;
9f03412a
AO		 3086 struct bfd_link_hash_entry *base;
3087
3088 if (!info->executable)
3089 return;
3090
351f65ca 3091 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3092 if (htab == NULL)
3093 return;
9f03412a 3094
4dfe6ac6
NC		 3095 base = htab->tls_module_base;
3096 if (base == NULL)
9f03412a
AO		 3097 return;
3098
4dfe6ac6 3099 base->u.def.value = htab->elf.tls_size;
9f03412a
AO		 3100}
3101
bffbf940
JJ		 3102/* Return the base VMA address which should be subtracted from real addresses
3103 when resolving @dtpoff relocation.
3104 This is PT_TLS segment p_vaddr. */
3105
3106static bfd_vma
351f65ca 3107elf_x86_64_dtpoff_base (struct bfd_link_info *info)
bffbf940 3108{
e1918d23
AM		 3109 /* If tls_sec is NULL, we should have signalled an error already. */
3110 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 3111 return 0;
e1918d23 3112 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ		 3113}
3114
3115/* Return the relocation value for @tpoff relocation
3116 if STT_TLS virtual address is ADDRESS. */
3117
3118static bfd_vma
351f65ca 3119elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 3120{
e1918d23 3121 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3122 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3123 bfd_vma static_tls_size;
bffbf940
JJ		 3124
3125 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 3126 if (htab->tls_sec == NULL)
bffbf940 3127 return 0;
7dc98aea
RO		 3128
3129 /* Consider special static TLS alignment requirements. */
3130 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3131 return address - static_tls_size - htab->tls_sec->vma;
bffbf940
JJ		 3132}
3133
90f487df
L		 3134/* Is the instruction before OFFSET in CONTENTS a 32bit relative
3135 branch? */
3136
3137static bfd_boolean
3138is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3139{
3140 /* Opcode Instruction
3141 0xe8 call
3142 0xe9 jump
3143 0x0f 0x8x conditional jump */
3144 return ((offset > 0
3145 && (contents [offset - 1] == 0xe8
3146 || contents [offset - 1] == 0xe9))
3147 || (offset > 1
3148 && contents [offset - 2] == 0x0f
3149 && (contents [offset - 1] & 0xf0) == 0x80));
3150}
3151
8d88c4ca
NC		 3152/* Relocate an x86_64 ELF section. */
3153
b34976b6 3154static bfd_boolean
351f65ca
L		 3155elf_x86_64_relocate_section (bfd *output_bfd,
3156 struct bfd_link_info *info,
3157 bfd *input_bfd,
3158 asection *input_section,
3159 bfd_byte *contents,
3160 Elf_Internal_Rela *relocs,
3161 Elf_Internal_Sym *local_syms,
3162 asection **local_sections)
8d88c4ca 3163{
351f65ca 3164 struct elf_x86_64_link_hash_table *htab;
8d88c4ca
NC		 3165 Elf_Internal_Shdr *symtab_hdr;
3166 struct elf_link_hash_entry **sym_hashes;
3167 bfd_vma *local_got_offsets;
67a4f2b7 3168 bfd_vma *local_tlsdesc_gotents;
c434dee6 3169 Elf_Internal_Rela *rel;
8d88c4ca 3170 Elf_Internal_Rela *relend;
eed180f8 3171 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
8d88c4ca 3172
0ffa91dd
NC		 3173 BFD_ASSERT (is_x86_64_elf (input_bfd));
3174
351f65ca 3175 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3176 if (htab == NULL)
3177 return FALSE;
0ffa91dd 3178 symtab_hdr = &elf_symtab_hdr (input_bfd);
8d88c4ca
NC		 3179 sym_hashes = elf_sym_hashes (input_bfd);
3180 local_got_offsets = elf_local_got_offsets (input_bfd);
351f65ca 3181 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
8d88c4ca 3182
351f65ca 3183 elf_x86_64_set_tls_module_base (info);
9f03412a 3184
c434dee6 3185 rel = relocs;
8d88c4ca 3186 relend = relocs + input_section->reloc_count;
c434dee6 3187 for (; rel < relend; rel++)
8d88c4ca 3188 {
bffbf940 3189 unsigned int r_type;
8d88c4ca
NC		 3190 reloc_howto_type *howto;
3191 unsigned long r_symndx;
3192 struct elf_link_hash_entry *h;
3193 Elf_Internal_Sym *sym;
3194 asection *sec;
67a4f2b7 3195 bfd_vma off, offplt;
8d88c4ca 3196 bfd_vma relocation;
b34976b6 3197 bfd_boolean unresolved_reloc;
8d88c4ca 3198 bfd_reloc_status_type r;
bffbf940 3199 int tls_type;
cbe950e9 3200 asection *base_got;
8d88c4ca 3201
351f65ca 3202 r_type = ELF32_R_TYPE (rel->r_info);
fe4770f4
AJ		 3203 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3204 || r_type == (int) R_X86_64_GNU_VTENTRY)
3205 continue;
8d88c4ca 3206
bffbf940 3207 if (r_type >= R_X86_64_max)
8da6118f
KH		 3208 {
3209 bfd_set_error (bfd_error_bad_value);
b34976b6 3210 return FALSE;
8da6118f 3211 }
8d88c4ca 3212
d7921315 3213 if (r_type != (int) R_X86_64_32
eed180f8 3214 || ABI_64_P (output_bfd))
d7921315
L		 3215 howto = x86_64_elf_howto_table + r_type;
3216 else
3217 howto = (x86_64_elf_howto_table
3218 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
351f65ca 3219 r_symndx = htab->r_sym (rel->r_info);
8d88c4ca
NC		 3220 h = NULL;
3221 sym = NULL;
3222 sec = NULL;
b34976b6 3223 unresolved_reloc = FALSE;
8d88c4ca 3224 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH		 3225 {
3226 sym = local_syms + r_symndx;
3227 sec = local_sections[r_symndx];
c434dee6 3228
c25bc9fc
L		 3229 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3230 &sec, rel);
3231
3232 /* Relocate against local STT_GNU_IFUNC symbol. */
1f85278f 3233 if (!info->relocatable
351f65ca 3234 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc 3235 {
351f65ca
L		 3236 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3237 rel, FALSE);
c25bc9fc
L		 3238 if (h == NULL)
3239 abort ();
3240
eed180f8 3241 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3242 h->root.u.def.value = sym->st_value;
3243 h->root.u.def.section = sec;
3244 }
8da6118f 3245 }
8d88c4ca 3246 else
8da6118f 3247 {
c9736ba0 3248 bfd_boolean warned ATTRIBUTE_UNUSED;
c434dee6 3249
b2a8e766
AM		 3250 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3251 r_symndx, symtab_hdr, sym_hashes,
3252 h, sec, relocation,
3253 unresolved_reloc, warned);
8da6118f 3254 }
ab96bf03 3255
dbaa2011 3256 if (sec != NULL && discarded_section (sec))
0672748a 3257 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 3258 rel, 1, relend, howto, 0, contents);
ab96bf03
AM		 3259
3260 if (info->relocatable)
3261 continue;
3262
64d25c44
L		 3263 if (rel->r_addend == 0
3264 && r_type == R_X86_64_64
3265 && !ABI_64_P (output_bfd))
3266 {
3267 /* For x32, treat R_X86_64_64 like R_X86_64_32 and zero-extend
3268 it to 64bit if addend is zero. */
3269 r_type = R_X86_64_32;
3270 memset (contents + rel->r_offset + 4, 0, 4);
3271 }
3272
cbe950e9
L		 3273 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3274 it here if it is defined in a non-shared object. */
3275 if (h != NULL
3276 && h->type == STT_GNU_IFUNC
3277 && h->def_regular)
3278 {
3279 asection *plt;
3280 bfd_vma plt_index;
4c544807 3281 const char *name;
cbe950e9
L		 3282
3283 if ((input_section->flags & SEC_ALLOC) == 0
3284 || h->plt.offset == (bfd_vma) -1)
3285 abort ();
3286
3287 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3288 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
cbe950e9
L		 3289 relocation = (plt->output_section->vma
3290 + plt->output_offset + h->plt.offset);
3291
3292 switch (r_type)
3293 {
3294 default:
4c544807
L		 3295 if (h->root.root.string)
3296 name = h->root.root.string;
3297 else
3298 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3299 NULL);
cbe950e9
L		 3300 (*_bfd_error_handler)
3301 (_("%B: relocation %s against STT_GNU_IFUNC "
3302 "symbol `%s' isn't handled by %s"), input_bfd,
3303 x86_64_elf_howto_table[r_type].name,
4c544807 3304 name, __FUNCTION__);
cbe950e9
L		 3305 bfd_set_error (bfd_error_bad_value);
3306 return FALSE;
3307
3308 case R_X86_64_32S:
710ab287 3309 if (info->shared)
cbe950e9 3310 abort ();
710ab287
L		 3311 goto do_relocation;
3312
248775ba
L		 3313 case R_X86_64_32:
3314 if (ABI_64_P (output_bfd))
3315 goto do_relocation;
17672001 3316 /* FALLTHROUGH */
eed180f8 3317 case R_X86_64_64:
710ab287
L		 3318 if (rel->r_addend != 0)
3319 {
4c544807
L		 3320 if (h->root.root.string)
3321 name = h->root.root.string;
3322 else
3323 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3324 sym, NULL);
710ab287
L		 3325 (*_bfd_error_handler)
3326 (_("%B: relocation %s against STT_GNU_IFUNC "
3327 "symbol `%s' has non-zero addend: %d"),
3328 input_bfd, x86_64_elf_howto_table[r_type].name,
4c544807 3329 name, rel->r_addend);
710ab287
L		 3330 bfd_set_error (bfd_error_bad_value);
3331 return FALSE;
3332 }
3333
3334 /* Generate dynamic relcoation only when there is a
c293fa49 3335 non-GOT reference in a shared object. */
710ab287
L		 3336 if (info->shared && h->non_got_ref)
3337 {
3338 Elf_Internal_Rela outrel;
710ab287
L		 3339 asection *sreloc;
3340
c25bc9fc
L		 3341 /* Need a dynamic relocation to get the real function
3342 address. */
710ab287
L		 3343 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3344 info,
3345 input_section,
3346 rel->r_offset);
3347 if (outrel.r_offset == (bfd_vma) -1
3348 || outrel.r_offset == (bfd_vma) -2)
3349 abort ();
3350
3351 outrel.r_offset += (input_section->output_section->vma
3352 + input_section->output_offset);
3353
3354 if (h->dynindx == -1
44c4ea11
L		 3355 || h->forced_local
3356 || info->executable)
710ab287
L		 3357 {
3358 /* This symbol is resolved locally. */
56b8aada
L		 3359 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3360 outrel.r_addend = (h->root.u.def.value
3361 + h->root.u.def.section->output_section->vma
3362 + h->root.u.def.section->output_offset);
710ab287
L		 3363 }
3364 else
3365 {
351f65ca 3366 outrel.r_info = htab->r_info (h->dynindx, r_type);
710ab287
L		 3367 outrel.r_addend = 0;
3368 }
3369
6de2ae4a 3370 sreloc = htab->elf.irelifunc;
351f65ca 3371 elf_append_rela (output_bfd, sreloc, &outrel);
710ab287
L		 3372
3373 /* If this reloc is against an external symbol, we
3374 do not want to fiddle with the addend. Otherwise,
3375 we need to include the symbol value so that it
3376 becomes an addend for the dynamic reloc. For an
3377 internal symbol, we have updated addend. */
56b8aada 3378 continue;
710ab287 3379 }
17672001 3380 /* FALLTHROUGH */
cbe950e9
L		 3381 case R_X86_64_PC32:
3382 case R_X86_64_PC64:
3383 case R_X86_64_PLT32:
3384 goto do_relocation;
3385
3386 case R_X86_64_GOTPCREL:
3387 case R_X86_64_GOTPCREL64:
6de2ae4a 3388 base_got = htab->elf.sgot;
cbe950e9
L		 3389 off = h->got.offset;
3390
7afd84dc 3391 if (base_got == NULL)
cbe950e9
L		 3392 abort ();
3393
7afd84dc 3394 if (off == (bfd_vma) -1)
cbe950e9 3395 {
7afd84dc
L		 3396 /* We can't use h->got.offset here to save state, or
3397 even just remember the offset, as finish_dynamic_symbol
3398 would use that as offset into .got. */
cbe950e9 3399
6de2ae4a 3400 if (htab->elf.splt != NULL)
7afd84dc 3401 {
eed180f8 3402 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 3403 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3404 base_got = htab->elf.sgotplt;
7afd84dc 3405 }
cbe950e9
L		 3406 else
3407 {
eed180f8 3408 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3409 off = plt_index * GOT_ENTRY_SIZE;
6de2ae4a 3410 base_got = htab->elf.igotplt;
7afd84dc
L		 3411 }
3412
3413 if (h->dynindx == -1
3414 || h->forced_local
3415 || info->symbolic)
3416 {
eed180f8 3417 /* This references the local defitionion. We must
7afd84dc 3418 initialize this entry in the global offset table.
eed180f8 3419 Since the offset must always be a multiple of 8,
7afd84dc
L		 3420 we use the least significant bit to record
3421 whether we have initialized it already.
3422
3423 When doing a dynamic link, we create a .rela.got
3424 relocation entry to initialize the value. This
3425 is done in the finish_dynamic_symbol routine. */
3426 if ((off & 1) != 0)
3427 off &= ~1;
3428 else
3429 {
3430 bfd_put_64 (output_bfd, relocation,
3431 base_got->contents + off);
3432 /* Note that this is harmless for the GOTPLT64
3433 case, as -1 | 1 still is -1. */
3434 h->got.offset |= 1;
3435 }
cbe950e9
L		 3436 }
3437 }
3438
3439 relocation = (base_got->output_section->vma
3440 + base_got->output_offset + off);
3441
cbe950e9
L		 3442 goto do_relocation;
3443 }
3444 }
3445
70256ad8
AJ		 3446 /* When generating a shared object, the relocations handled here are
3447 copied into the output file to be resolved at run time. */
3448 switch (r_type)
3449 {
3450 case R_X86_64_GOT32:
7b81dfbb 3451 case R_X86_64_GOT64:
70256ad8
AJ		 3452 /* Relocation is to the entry for this symbol in the global
3453 offset table. */
70256ad8 3454 case R_X86_64_GOTPCREL:
7b81dfbb
AJ		 3455 case R_X86_64_GOTPCREL64:
3456 /* Use global offset table entry as symbol value. */
3457 case R_X86_64_GOTPLT64:
3458 /* This is the same as GOT64 for relocation purposes, but
3459 indicates the existence of a PLT entry. The difficulty is,
3460 that we must calculate the GOT slot offset from the PLT
3461 offset, if this symbol got a PLT entry (it was global).
3462 Additionally if it's computed from the PLT entry, then that
3463 GOT offset is relative to .got.plt, not to .got. */
6de2ae4a 3464 base_got = htab->elf.sgot;
7b81dfbb 3465
6de2ae4a 3466 if (htab->elf.sgot == NULL)
c434dee6 3467 abort ();
053579d7 3468
51e0a107 3469 if (h != NULL)
70256ad8 3470 {
b34976b6 3471 bfd_boolean dyn;
c434dee6
AJ		 3472
3473 off = h->got.offset;
7b81dfbb 3474 if (h->needs_plt
eed180f8 3475 && h->plt.offset != (bfd_vma)-1
7b81dfbb
AJ		 3476 && off == (bfd_vma)-1)
3477 {
3478 /* We can't use h->got.offset here to save
3479 state, or even just remember the offset, as
3480 finish_dynamic_symbol would use that as offset into
3481 .got. */
eed180f8 3482 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
7b81dfbb 3483 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3484 base_got = htab->elf.sgotplt;
7b81dfbb
AJ		 3485 }
3486
c434dee6 3487 dyn = htab->elf.dynamic_sections_created;
51e0a107 3488
27482721 3489 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
51e0a107 3490 || (info->shared
27482721 3491 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ		 3492 || (ELF_ST_VISIBILITY (h->other)
3493 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH		 3494 {
3495 /* This is actually a static link, or it is a -Bsymbolic
3496 link and the symbol is defined locally, or the symbol
407443a3 3497 was forced to be local because of a version file. We
51e0a107
JH		 3498 must initialize this entry in the global offset table.
3499 Since the offset must always be a multiple of 8, we
3500 use the least significant bit to record whether we
3501 have initialized it already.
3502
3503 When doing a dynamic link, we create a .rela.got
407443a3
AJ		 3504 relocation entry to initialize the value. This is
3505 done in the finish_dynamic_symbol routine. */
51e0a107
JH		 3506 if ((off & 1) != 0)
3507 off &= ~1;
3508 else
3509 {
3510 bfd_put_64 (output_bfd, relocation,
7b81dfbb
AJ		 3511 base_got->contents + off);
3512 /* Note that this is harmless for the GOTPLT64 case,
eed180f8 3513 as -1 | 1 still is -1. */
51e0a107
JH		 3514 h->got.offset |= 1;
3515 }
3516 }
053579d7 3517 else
b34976b6 3518 unresolved_reloc = FALSE;
70256ad8 3519 }
51e0a107
JH		 3520 else
3521 {
c434dee6
AJ		 3522 if (local_got_offsets == NULL)
3523 abort ();
51e0a107
JH		 3524
3525 off = local_got_offsets[r_symndx];
3526
3527 /* The offset must always be a multiple of 8. We use
407443a3
AJ		 3528 the least significant bit to record whether we have
3529 already generated the necessary reloc. */
51e0a107
JH		 3530 if ((off & 1) != 0)
3531 off &= ~1;
3532 else
3533 {
c434dee6 3534 bfd_put_64 (output_bfd, relocation,
7b81dfbb 3535 base_got->contents + off);
51e0a107
JH		 3536
3537 if (info->shared)
3538 {
947216bf 3539 asection *s;
51e0a107 3540 Elf_Internal_Rela outrel;
70256ad8 3541
51e0a107
JH		 3542 /* We need to generate a R_X86_64_RELATIVE reloc
3543 for the dynamic linker. */
6de2ae4a 3544 s = htab->elf.srelgot;
947216bf 3545 if (s == NULL)
c434dee6 3546 abort ();
51e0a107 3547
7b81dfbb
AJ		 3548 outrel.r_offset = (base_got->output_section->vma
3549 + base_got->output_offset
51e0a107 3550 + off);
351f65ca 3551 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
51e0a107 3552 outrel.r_addend = relocation;
351f65ca 3553 elf_append_rela (output_bfd, s, &outrel);
51e0a107
JH		 3554 }
3555
3556 local_got_offsets[r_symndx] |= 1;
3557 }
51e0a107 3558 }
6a2bda3f 3559
c434dee6
AJ		 3560 if (off >= (bfd_vma) -2)
3561 abort ();
3562
7b81dfbb
AJ		 3563 relocation = base_got->output_section->vma
3564 + base_got->output_offset + off;
3565 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
6de2ae4a
L		 3566 relocation -= htab->elf.sgotplt->output_section->vma
3567 - htab->elf.sgotplt->output_offset;
c434dee6 3568
70256ad8
AJ		 3569 break;
3570
d6ab8113
JB		 3571 case R_X86_64_GOTOFF64:
3572 /* Relocation is relative to the start of the global offset
3573 table. */
3574
3575 /* Check to make sure it isn't a protected function symbol
3576 for shared library since it may not be local when used
3577 as function address. */
bdb892b9 3578 if (!info->executable
d6ab8113 3579 && h
bdb892b9 3580 && !SYMBOLIC_BIND (info, h)
d6ab8113
JB		 3581 && h->def_regular
3582 && h->type == STT_FUNC
3583 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3584 {
3585 (*_bfd_error_handler)
3586 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3587 input_bfd, h->root.root.string);
3588 bfd_set_error (bfd_error_bad_value);
3589 return FALSE;
3590 }
3591
3592 /* Note that sgot is not involved in this
3593 calculation. We always want the start of .got.plt. If we
3594 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3595 permitted by the ABI, we might have to change this
3596 calculation. */
6de2ae4a
L		 3597 relocation -= htab->elf.sgotplt->output_section->vma
3598 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 3599 break;
3600
3601 case R_X86_64_GOTPC32:
7b81dfbb 3602 case R_X86_64_GOTPC64:
d6ab8113 3603 /* Use global offset table as symbol value. */
6de2ae4a
L		 3604 relocation = htab->elf.sgotplt->output_section->vma
3605 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 3606 unresolved_reloc = FALSE;
3607 break;
7b81dfbb
AJ		 3608
3609 case R_X86_64_PLTOFF64:
3610 /* Relocation is PLT entry relative to GOT. For local
3611 symbols it's the symbol itself relative to GOT. */
eed180f8 3612 if (h != NULL
7b81dfbb
AJ		 3613 /* See PLT32 handling. */
3614 && h->plt.offset != (bfd_vma) -1
6de2ae4a 3615 && htab->elf.splt != NULL)
7b81dfbb 3616 {
6de2ae4a
L		 3617 relocation = (htab->elf.splt->output_section->vma
3618 + htab->elf.splt->output_offset
7b81dfbb
AJ		 3619 + h->plt.offset);
3620 unresolved_reloc = FALSE;
3621 }
3622
6de2ae4a
L		 3623 relocation -= htab->elf.sgotplt->output_section->vma
3624 + htab->elf.sgotplt->output_offset;
7b81dfbb 3625 break;
d6ab8113 3626
70256ad8
AJ		 3627 case R_X86_64_PLT32:
3628 /* Relocation is to the entry for this symbol in the
3629 procedure linkage table. */
3630
3631 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 3632 without using the procedure linkage table. */
70256ad8
AJ		 3633 if (h == NULL)
3634 break;
3635
c434dee6 3636 if (h->plt.offset == (bfd_vma) -1
6de2ae4a 3637 || htab->elf.splt == NULL)
70256ad8
AJ		 3638 {
3639 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ		 3640 happens when statically linking PIC code, or when
3641 using -Bsymbolic. */
70256ad8
AJ		 3642 break;
3643 }
3644
6de2ae4a
L		 3645 relocation = (htab->elf.splt->output_section->vma
3646 + htab->elf.splt->output_offset
70256ad8 3647 + h->plt.offset);
b34976b6 3648 unresolved_reloc = FALSE;
70256ad8
AJ		 3649 break;
3650
fd8ab9e5
AJ		 3651 case R_X86_64_PC8:
3652 case R_X86_64_PC16:
3653 case R_X86_64_PC32:
6610a52d 3654 if (info->shared
ba3bee0b 3655 && (input_section->flags & SEC_ALLOC) != 0
90f487df 3656 && (input_section->flags & SEC_READONLY) != 0
41bed6dd 3657 && h != NULL)
6610a52d 3658 {
41bed6dd
L		 3659 bfd_boolean fail = FALSE;
3660 bfd_boolean branch
3661 = (r_type == R_X86_64_PC32
3662 && is_32bit_relative_branch (contents, rel->r_offset));
3663
3664 if (SYMBOL_REFERENCES_LOCAL (info, h))
3665 {
3666 /* Symbol is referenced locally. Make sure it is
3667 defined locally or for a branch. */
3668 fail = !h->def_regular && !branch;
3669 }
90f487df 3670 else
41bed6dd
L		 3671 {
3672 /* Symbol isn't referenced locally. We only allow
3673 branch to symbol with non-default visibility. */
3674 fail = (!branch
3675 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3676 }
3677
3678 if (fail)
3679 {
3680 const char *fmt;
3681 const char *v;
3682 const char *pic = "";
3683
3684 switch (ELF_ST_VISIBILITY (h->other))
3685 {
3686 case STV_HIDDEN:
3687 v = _("hidden symbol");
3688 break;
3689 case STV_INTERNAL:
3690 v = _("internal symbol");
3691 break;
3692 case STV_PROTECTED:
3693 v = _("protected symbol");
3694 break;
3695 default:
3696 v = _("symbol");
3697 pic = _("; recompile with -fPIC");
3698 break;
3699 }
3700
3701 if (h->def_regular)
3702 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3703 else
3704 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3705
3706 (*_bfd_error_handler) (fmt, input_bfd,
3707 x86_64_elf_howto_table[r_type].name,
3708 v, h->root.root.string, pic);
3709 bfd_set_error (bfd_error_bad_value);
3710 return FALSE;
3711 }
6610a52d
L		 3712 }
3713 /* Fall through. */
3714
70256ad8
AJ		 3715 case R_X86_64_8:
3716 case R_X86_64_16:
3717 case R_X86_64_32:
d6ab8113 3718 case R_X86_64_PC64:
6b3db546 3719 case R_X86_64_64:
80643fbc 3720 /* FIXME: The ABI says the linker should make sure the value is
407443a3 3721 the same when it's zeroextended to 64 bit. */
c434dee6 3722
b1e24c02 3723 if ((input_section->flags & SEC_ALLOC) == 0)
c434dee6
AJ		 3724 break;
3725
3726 if ((info->shared
4bc6e03a
AJ		 3727 && (h == NULL
3728 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3729 || h->root.type != bfd_link_hash_undefweak)
d8045f23
NC		 3730 && (! IS_X86_64_PCREL_TYPE (r_type)
3731 || ! SYMBOL_CALLS_LOCAL (info, h)))
d40d037c
AJ		 3732 || (ELIMINATE_COPY_RELOCS
3733 && !info->shared
c434dee6
AJ		 3734 && h != NULL
3735 && h->dynindx != -1
f5385ebf
AM		 3736 && !h->non_got_ref
3737 && ((h->def_dynamic
3738 && !h->def_regular)
c434dee6 3739 || h->root.type == bfd_link_hash_undefweak
0f88be7a 3740 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ		 3741 {
3742 Elf_Internal_Rela outrel;
b34976b6 3743 bfd_boolean skip, relocate;
c434dee6 3744 asection *sreloc;
70256ad8
AJ		 3745
3746 /* When generating a shared object, these relocations
3747 are copied into the output file to be resolved at run
407443a3 3748 time. */
b34976b6
AM		 3749 skip = FALSE;
3750 relocate = FALSE;
70256ad8 3751
c629eae0
JJ		 3752 outrel.r_offset =
3753 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 3754 rel->r_offset);
c629eae0 3755 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 3756 skip = TRUE;
0fb19cbc 3757 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 3758 skip = TRUE, relocate = TRUE;
70256ad8
AJ		 3759
3760 outrel.r_offset += (input_section->output_section->vma
3761 + input_section->output_offset);
3762
3763 if (skip)
0bb2d96a 3764 memset (&outrel, 0, sizeof outrel);
c434dee6 3765
fd8ab9e5
AJ		 3766 /* h->dynindx may be -1 if this symbol was marked to
3767 become local. */
3768 else if (h != NULL
c434dee6 3769 && h->dynindx != -1
d8045f23
NC		 3770 && (IS_X86_64_PCREL_TYPE (r_type)
3771 || ! info->shared
3772 || ! SYMBOLIC_BIND (info, h)
3773 || ! h->def_regular))
70256ad8 3774 {
351f65ca 3775 outrel.r_info = htab->r_info (h->dynindx, r_type);
c434dee6 3776 outrel.r_addend = rel->r_addend;
70256ad8
AJ		 3777 }
3778 else
3779 {
c434dee6 3780 /* This symbol is local, or marked to become local. */
248775ba 3781 if (r_type == htab->pointer_r_type)
607c0e09 3782 {
b34976b6 3783 relocate = TRUE;
351f65ca 3784 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
607c0e09
AS		 3785 outrel.r_addend = relocation + rel->r_addend;
3786 }
64d25c44
L		 3787 else if (r_type == R_X86_64_64
3788 && !ABI_64_P (output_bfd))
3789 {
3790 relocate = TRUE;
3791 outrel.r_info = htab->r_info (0,
3792 R_X86_64_RELATIVE64);
3793 outrel.r_addend = relocation + rel->r_addend;
8cf0d2dd
L		 3794 /* Check addend overflow. */
3795 if ((outrel.r_addend & 0x80000000)
3796 != (rel->r_addend & 0x80000000))
3797 {
3798 const char *name;
268a8d3a 3799 int addend = rel->r_addend;
8cf0d2dd
L		 3800 if (h && h->root.root.string)
3801 name = h->root.root.string;
3802 else
3803 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3804 sym, NULL);
6f2c9068
L		 3805 if (addend < 0)
3806 (*_bfd_error_handler)
268a8d3a 3807 (_("%B: addend -0x%x in relocation %s against "
6f2c9068
L		 3808 "symbol `%s' at 0x%lx in section `%A' is "
3809 "out of range"),
3810 input_bfd, input_section, addend,
3811 x86_64_elf_howto_table[r_type].name,
3812 name, (unsigned long) rel->r_offset);
3813 else
3814 (*_bfd_error_handler)
268a8d3a 3815 (_("%B: addend 0x%x in relocation %s against "
6f2c9068
L		 3816 "symbol `%s' at 0x%lx in section `%A' is "
3817 "out of range"),
3818 input_bfd, input_section, addend,
3819 x86_64_elf_howto_table[r_type].name,
3820 name, (unsigned long) rel->r_offset);
8cf0d2dd
L		 3821 bfd_set_error (bfd_error_bad_value);
3822 return FALSE;
3823 }
64d25c44 3824 }
607c0e09
AS		 3825 else
3826 {
3827 long sindx;
3828
8517fae7 3829 if (bfd_is_abs_section (sec))
607c0e09
AS		 3830 sindx = 0;
3831 else if (sec == NULL || sec->owner == NULL)
3832 {
3833 bfd_set_error (bfd_error_bad_value);
b34976b6 3834 return FALSE;
607c0e09
AS		 3835 }
3836 else
3837 {
3838 asection *osec;
3839
74541ad4
AM		 3840 /* We are turning this relocation into one
3841 against a section symbol. It would be
3842 proper to subtract the symbol's value,
3843 osec->vma, from the emitted reloc addend,
3844 but ld.so expects buggy relocs. */
607c0e09
AS		 3845 osec = sec->output_section;
3846 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 3847 if (sindx == 0)
3848 {
3849 asection *oi = htab->elf.text_index_section;
3850 sindx = elf_section_data (oi)->dynindx;
3851 }
3852 BFD_ASSERT (sindx != 0);
607c0e09
AS		 3853 }
3854
351f65ca 3855 outrel.r_info = htab->r_info (sindx, r_type);
607c0e09
AS		 3856 outrel.r_addend = relocation + rel->r_addend;
3857 }
70256ad8
AJ		 3858 }
3859
cbe950e9 3860 sreloc = elf_section_data (input_section)->sreloc;
d8045f23 3861
62d78908
L		 3862 if (sreloc == NULL || sreloc->contents == NULL)
3863 {
3864 r = bfd_reloc_notsupported;
3865 goto check_relocation_error;
3866 }
c434dee6 3867
351f65ca 3868 elf_append_rela (output_bfd, sreloc, &outrel);
70256ad8
AJ		 3869
3870 /* If this reloc is against an external symbol, we do
3871 not want to fiddle with the addend. Otherwise, we
3872 need to include the symbol value so that it becomes
3873 an addend for the dynamic reloc. */
0f88be7a 3874 if (! relocate)
70256ad8
AJ		 3875 continue;
3876 }
3877
3878 break;
3879
bffbf940 3880 case R_X86_64_TLSGD:
67a4f2b7
AO		 3881 case R_X86_64_GOTPC32_TLSDESC:
3882 case R_X86_64_TLSDESC_CALL:
bffbf940 3883 case R_X86_64_GOTTPOFF:
bffbf940
JJ		 3884 tls_type = GOT_UNKNOWN;
3885 if (h == NULL && local_got_offsets)
351f65ca 3886 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
bffbf940 3887 else if (h != NULL)
351f65ca 3888 tls_type = elf_x86_64_hash_entry (h)->tls_type;
142411ca 3889
351f65ca
L		 3890 if (! elf_x86_64_tls_transition (info, input_bfd,
3891 input_section, contents,
3892 symtab_hdr, sym_hashes,
3893 &r_type, tls_type, rel,
3894 relend, h, r_symndx))
534a31f6 3895 return FALSE;
bffbf940
JJ		 3896
3897 if (r_type == R_X86_64_TPOFF32)
3898 {
142411ca
L		 3899 bfd_vma roff = rel->r_offset;
3900
bffbf940 3901 BFD_ASSERT (! unresolved_reloc);
142411ca 3902
351f65ca 3903 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
bffbf940 3904 {
52bc799a 3905 /* GD->LE transition. For 64bit, change
abcf1d52 3906 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
a3fadc9a 3907 .word 0x6666; rex64; call __tls_get_addr
52bc799a 3908 into:
bffbf940 3909 movq %fs:0, %rax
52bc799a
L		 3910 leaq foo@tpoff(%rax), %rax
3911 For 32bit, change
3912 leaq foo@tlsgd(%rip), %rdi
3913 .word 0x6666; rex64; call __tls_get_addr
3914 into:
3915 movl %fs:0, %eax
bffbf940 3916 leaq foo@tpoff(%rax), %rax */
52bc799a
L		 3917 if (ABI_64_P (output_bfd))
3918 memcpy (contents + roff - 4,
3919 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3920 16);
3921 else
3922 memcpy (contents + roff - 3,
3923 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3924 15);
eb4ff4d6 3925 bfd_put_32 (output_bfd,
351f65ca 3926 elf_x86_64_tpoff (info, relocation),
142411ca 3927 contents + roff + 8);
a3fadc9a 3928 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
bffbf940
JJ		 3929 rel++;
3930 continue;
3931 }
351f65ca 3932 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
67a4f2b7
AO		 3933 {
3934 /* GDesc -> LE transition.
3935 It's originally something like:
3936 leaq x@tlsdesc(%rip), %rax
3937
3938 Change it to:
c9736ba0 3939 movl $x@tpoff, %rax. */
67a4f2b7 3940
c9736ba0 3941 unsigned int val, type;
67a4f2b7 3942
67a4f2b7 3943 type = bfd_get_8 (input_bfd, contents + roff - 3);
67a4f2b7 3944 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 3945 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
3946 contents + roff - 3);
3947 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
3948 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3949 contents + roff - 1);
eb4ff4d6 3950 bfd_put_32 (output_bfd,
351f65ca 3951 elf_x86_64_tpoff (info, relocation),
67a4f2b7
AO		 3952 contents + roff);
3953 continue;
3954 }
351f65ca 3955 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
67a4f2b7
AO		 3956 {
3957 /* GDesc -> LE transition.
3958 It's originally:
3959 call *(%rax)
3960 Turn it into:
142411ca 3961 xchg %ax,%ax. */
10efb593 3962 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 3963 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3964 continue;
3965 }
351f65ca 3966 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
bffbf940 3967 {
bffbf940
JJ		 3968 /* IE->LE transition:
3969 Originally it can be one of:
3970 movq foo@gottpoff(%rip), %reg
3971 addq foo@gottpoff(%rip), %reg
3972 We change it into:
3973 movq $foo, %reg
3974 leaq foo(%reg), %reg
3975 addq $foo, %reg. */
142411ca
L		 3976
3977 unsigned int val, type, reg;
3978
3979 val = bfd_get_8 (input_bfd, contents + roff - 3);
3980 type = bfd_get_8 (input_bfd, contents + roff - 2);
3981 reg = bfd_get_8 (input_bfd, contents + roff - 1);
bffbf940 3982 reg >>= 3;
bffbf940
JJ		 3983 if (type == 0x8b)
3984 {
3985 /* movq */
3986 if (val == 0x4c)
3987 bfd_put_8 (output_bfd, 0x49,
142411ca 3988 contents + roff - 3);
4a4c5f25
L		 3989 else if (!ABI_64_P (output_bfd) && val == 0x44)
3990 bfd_put_8 (output_bfd, 0x41,
3991 contents + roff - 3);
bffbf940 3992 bfd_put_8 (output_bfd, 0xc7,
142411ca 3993 contents + roff - 2);
bffbf940 3994 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 3995 contents + roff - 1);
bffbf940
JJ		 3996 }
3997 else if (reg == 4)
3998 {
3999 /* addq -> addq - addressing with %rsp/%r12 is
4000 special */
4001 if (val == 0x4c)
4002 bfd_put_8 (output_bfd, 0x49,
142411ca 4003 contents + roff - 3);
4a4c5f25
L		 4004 else if (!ABI_64_P (output_bfd) && val == 0x44)
4005 bfd_put_8 (output_bfd, 0x41,
4006 contents + roff - 3);
bffbf940 4007 bfd_put_8 (output_bfd, 0x81,
142411ca 4008 contents + roff - 2);
bffbf940 4009 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4010 contents + roff - 1);
bffbf940
JJ		 4011 }
4012 else
4013 {
4014 /* addq -> leaq */
4015 if (val == 0x4c)
4016 bfd_put_8 (output_bfd, 0x4d,
142411ca 4017 contents + roff - 3);
4a4c5f25
L		 4018 else if (!ABI_64_P (output_bfd) && val == 0x44)
4019 bfd_put_8 (output_bfd, 0x45,
4020 contents + roff - 3);
bffbf940 4021 bfd_put_8 (output_bfd, 0x8d,
142411ca 4022 contents + roff - 2);
bffbf940 4023 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
142411ca 4024 contents + roff - 1);
bffbf940 4025 }
eb4ff4d6 4026 bfd_put_32 (output_bfd,
351f65ca 4027 elf_x86_64_tpoff (info, relocation),
142411ca 4028 contents + roff);
bffbf940
JJ		 4029 continue;
4030 }
142411ca
L		 4031 else
4032 BFD_ASSERT (FALSE);
bffbf940
JJ		 4033 }
4034
6de2ae4a 4035 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4036 abort ();
4037
4038 if (h != NULL)
67a4f2b7
AO		 4039 {
4040 off = h->got.offset;
351f65ca 4041 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
67a4f2b7 4042 }
bffbf940
JJ		 4043 else
4044 {
4045 if (local_got_offsets == NULL)
4046 abort ();
4047
4048 off = local_got_offsets[r_symndx];
67a4f2b7 4049 offplt = local_tlsdesc_gotents[r_symndx];
bffbf940
JJ		 4050 }
4051
4052 if ((off & 1) != 0)
4053 off &= ~1;
26e41594 4054 else
bffbf940
JJ		 4055 {
4056 Elf_Internal_Rela outrel;
bffbf940 4057 int dr_type, indx;
67a4f2b7 4058 asection *sreloc;
bffbf940 4059
6de2ae4a 4060 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4061 abort ();
4062
67a4f2b7
AO		 4063 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4064
4065 if (GOT_TLS_GDESC_P (tls_type))
4066 {
351f65ca 4067 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
67a4f2b7 4068 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
6de2ae4a
L		 4069 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4070 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4071 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4072 + offplt
4073 + htab->sgotplt_jump_table_size);
6de2ae4a 4074 sreloc = htab->elf.srelplt;
67a4f2b7 4075 if (indx == 0)
351f65ca 4076 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
67a4f2b7
AO		 4077 else
4078 outrel.r_addend = 0;
351f65ca 4079 elf_append_rela (output_bfd, sreloc, &outrel);
67a4f2b7
AO		 4080 }
4081
6de2ae4a 4082 sreloc = htab->elf.srelgot;
67a4f2b7 4083
6de2ae4a
L		 4084 outrel.r_offset = (htab->elf.sgot->output_section->vma
4085 + htab->elf.sgot->output_offset + off);
bffbf940 4086
67a4f2b7 4087 if (GOT_TLS_GD_P (tls_type))
bffbf940 4088 dr_type = R_X86_64_DTPMOD64;
67a4f2b7
AO		 4089 else if (GOT_TLS_GDESC_P (tls_type))
4090 goto dr_done;
bffbf940
JJ		 4091 else
4092 dr_type = R_X86_64_TPOFF64;
4093
6de2ae4a 4094 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
bffbf940 4095 outrel.r_addend = 0;
67a4f2b7
AO		 4096 if ((dr_type == R_X86_64_TPOFF64
4097 || dr_type == R_X86_64_TLSDESC) && indx == 0)
351f65ca
L		 4098 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4099 outrel.r_info = htab->r_info (indx, dr_type);
bffbf940 4100
351f65ca 4101 elf_append_rela (output_bfd, sreloc, &outrel);
bffbf940 4102
67a4f2b7 4103 if (GOT_TLS_GD_P (tls_type))
bffbf940
JJ		 4104 {
4105 if (indx == 0)
4106 {
d40d037c 4107 BFD_ASSERT (! unresolved_reloc);
bffbf940 4108 bfd_put_64 (output_bfd,
351f65ca 4109 relocation - elf_x86_64_dtpoff_base (info),
6de2ae4a 4110 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
bffbf940
JJ		 4111 }
4112 else
4113 {
4114 bfd_put_64 (output_bfd, 0,
6de2ae4a 4115 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4116 outrel.r_info = htab->r_info (indx,
bffbf940
JJ		 4117 R_X86_64_DTPOFF64);
4118 outrel.r_offset += GOT_ENTRY_SIZE;
351f65ca 4119 elf_append_rela (output_bfd, sreloc,
464d3bd4 4120 &outrel);
bffbf940
JJ		 4121 }
4122 }
4123
67a4f2b7 4124 dr_done:
bffbf940
JJ		 4125 if (h != NULL)
4126 h->got.offset |= 1;
4127 else
4128 local_got_offsets[r_symndx] |= 1;
4129 }
4130
67a4f2b7
AO		 4131 if (off >= (bfd_vma) -2
4132 && ! GOT_TLS_GDESC_P (tls_type))
bffbf940 4133 abort ();
351f65ca 4134 if (r_type == ELF32_R_TYPE (rel->r_info))
bffbf940 4135 {
67a4f2b7
AO		 4136 if (r_type == R_X86_64_GOTPC32_TLSDESC
4137 || r_type == R_X86_64_TLSDESC_CALL)
6de2ae4a
L		 4138 relocation = htab->elf.sgotplt->output_section->vma
4139 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4140 + offplt + htab->sgotplt_jump_table_size;
4141 else
6de2ae4a
L		 4142 relocation = htab->elf.sgot->output_section->vma
4143 + htab->elf.sgot->output_offset + off;
b34976b6 4144 unresolved_reloc = FALSE;
bffbf940 4145 }
142411ca 4146 else
67a4f2b7 4147 {
142411ca 4148 bfd_vma roff = rel->r_offset;
67a4f2b7 4149
351f65ca 4150 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
142411ca 4151 {
52bc799a 4152 /* GD->IE transition. For 64bit, change
142411ca
L		 4153 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4154 .word 0x6666; rex64; call __tls_get_addr@plt
52bc799a 4155 into:
142411ca 4156 movq %fs:0, %rax
52bc799a
L		 4157 addq foo@gottpoff(%rip), %rax
4158 For 32bit, change
4159 leaq foo@tlsgd(%rip), %rdi
4160 .word 0x6666; rex64; call __tls_get_addr@plt
4161 into:
4162 movl %fs:0, %eax
142411ca 4163 addq foo@gottpoff(%rip), %rax */
52bc799a
L		 4164 if (ABI_64_P (output_bfd))
4165 memcpy (contents + roff - 4,
4166 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4167 16);
4168 else
4169 memcpy (contents + roff - 3,
4170 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4171 15);
142411ca 4172
6de2ae4a
L		 4173 relocation = (htab->elf.sgot->output_section->vma
4174 + htab->elf.sgot->output_offset + off
142411ca
L		 4175 - roff
4176 - input_section->output_section->vma
4177 - input_section->output_offset
4178 - 12);
4179 bfd_put_32 (output_bfd, relocation,
4180 contents + roff + 8);
4181 /* Skip R_X86_64_PLT32. */
4182 rel++;
4183 continue;
4184 }
351f65ca 4185 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
142411ca
L		 4186 {
4187 /* GDesc -> IE transition.
4188 It's originally something like:
4189 leaq x@tlsdesc(%rip), %rax
67a4f2b7 4190
142411ca 4191 Change it to:
c9736ba0 4192 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
67a4f2b7 4193
142411ca
L		 4194 /* Now modify the instruction as appropriate. To
4195 turn a leaq into a movq in the form we use it, it
4196 suffices to change the second byte from 0x8d to
4197 0x8b. */
4198 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4199
4200 bfd_put_32 (output_bfd,
6de2ae4a
L		 4201 htab->elf.sgot->output_section->vma
4202 + htab->elf.sgot->output_offset + off
142411ca
L		 4203 - rel->r_offset
4204 - input_section->output_section->vma
4205 - input_section->output_offset
4206 - 4,
4207 contents + roff);
4208 continue;
4209 }
351f65ca 4210 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
142411ca
L		 4211 {
4212 /* GDesc -> IE transition.
4213 It's originally:
4214 call *(%rax)
4215
4216 Change it to:
c9736ba0 4217 xchg %ax, %ax. */
142411ca 4218
142411ca
L		 4219 bfd_put_8 (output_bfd, 0x66, contents + roff);
4220 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4221 continue;
4222 }
4223 else
4224 BFD_ASSERT (FALSE);
67a4f2b7 4225 }
bffbf940
JJ		 4226 break;
4227
4228 case R_X86_64_TLSLD:
351f65ca
L		 4229 if (! elf_x86_64_tls_transition (info, input_bfd,
4230 input_section, contents,
4231 symtab_hdr, sym_hashes,
4232 &r_type, GOT_UNKNOWN,
4233 rel, relend, h, r_symndx))
142411ca 4234 return FALSE;
a3fadc9a 4235
142411ca
L		 4236 if (r_type != R_X86_64_TLSLD)
4237 {
bffbf940 4238 /* LD->LE transition:
a3fadc9a 4239 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
52bc799a
L		 4240 For 64bit, we change it into:
4241 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4242 For 32bit, we change it into:
4243 nopl 0x0(%rax); movl %fs:0, %eax. */
142411ca
L		 4244
4245 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
52bc799a
L		 4246 if (ABI_64_P (output_bfd))
4247 memcpy (contents + rel->r_offset - 3,
4248 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4249 else
4250 memcpy (contents + rel->r_offset - 3,
4251 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
a3fadc9a 4252 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
bffbf940
JJ		 4253 rel++;
4254 continue;
4255 }
4256
6de2ae4a 4257 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4258 abort ();
4259
4260 off = htab->tls_ld_got.offset;
4261 if (off & 1)
4262 off &= ~1;
4263 else
4264 {
4265 Elf_Internal_Rela outrel;
bffbf940 4266
6de2ae4a 4267 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4268 abort ();
4269
6de2ae4a
L		 4270 outrel.r_offset = (htab->elf.sgot->output_section->vma
4271 + htab->elf.sgot->output_offset + off);
bffbf940
JJ		 4272
4273 bfd_put_64 (output_bfd, 0,
6de2ae4a 4274 htab->elf.sgot->contents + off);
bffbf940 4275 bfd_put_64 (output_bfd, 0,
6de2ae4a 4276 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4277 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
bffbf940 4278 outrel.r_addend = 0;
351f65ca 4279 elf_append_rela (output_bfd, htab->elf.srelgot,
464d3bd4 4280 &outrel);
bffbf940
JJ		 4281 htab->tls_ld_got.offset |= 1;
4282 }
6de2ae4a
L		 4283 relocation = htab->elf.sgot->output_section->vma
4284 + htab->elf.sgot->output_offset + off;
b34976b6 4285 unresolved_reloc = FALSE;
bffbf940
JJ		 4286 break;
4287
4288 case R_X86_64_DTPOFF32:
1d85728f 4289 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
351f65ca 4290 relocation -= elf_x86_64_dtpoff_base (info);
bffbf940 4291 else
351f65ca 4292 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4293 break;
4294
4295 case R_X86_64_TPOFF32:
6769d501 4296 case R_X86_64_TPOFF64:
9b769489 4297 BFD_ASSERT (info->executable);
351f65ca 4298 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4299 break;
4300
70256ad8
AJ		 4301 default:
4302 break;
4303 }
8d88c4ca 4304
239e1f3a
AM		 4305 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4306 because such sections are not SEC_ALLOC and thus ld.so will
4307 not process them. */
c434dee6 4308 if (unresolved_reloc
239e1f3a 4309 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4310 && h->def_dynamic)
4311 && _bfd_elf_section_offset (output_bfd, info, input_section,
4312 rel->r_offset) != (bfd_vma) -1)
a040981f
L		 4313 {
4314 (*_bfd_error_handler)
4315 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4316 input_bfd,
4317 input_section,
4318 (long) rel->r_offset,
4319 howto->name,
4320 h->root.root.string);
4321 return FALSE;
4322 }
c434dee6 4323
cbe950e9 4324do_relocation:
8d88c4ca 4325 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ		 4326 contents, rel->r_offset,
4327 relocation, rel->r_addend);
8d88c4ca 4328
62d78908 4329check_relocation_error:
8d88c4ca 4330 if (r != bfd_reloc_ok)
8da6118f 4331 {
c434dee6
AJ		 4332 const char *name;
4333
4334 if (h != NULL)
4335 name = h->root.root.string;
4336 else
8da6118f 4337 {
c434dee6
AJ		 4338 name = bfd_elf_string_from_elf_section (input_bfd,
4339 symtab_hdr->sh_link,
4340 sym->st_name);
4341 if (name == NULL)
b34976b6 4342 return FALSE;
c434dee6
AJ		 4343 if (*name == '\0')
4344 name = bfd_section_name (input_bfd, sec);
4345 }
4346
4347 if (r == bfd_reloc_overflow)
4348 {
c434dee6 4349 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 4350 (info, (h ? &h->root : NULL), name, howto->name,
4351 (bfd_vma) 0, input_bfd, input_section,
4352 rel->r_offset)))
b34976b6 4353 return FALSE;
c434dee6
AJ		 4354 }
4355 else
4356 {
4357 (*_bfd_error_handler)
bb95161d 4358 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
d003868e 4359 input_bfd, input_section,
c434dee6 4360 (long) rel->r_offset, name, (int) r);
b34976b6 4361 return FALSE;
8da6118f
KH		 4362 }
4363 }
8d88c4ca 4364 }
70256ad8 4365
b34976b6 4366 return TRUE;
70256ad8
AJ		 4367}
4368
4369/* Finish up dynamic symbol handling. We set the contents of various
4370 dynamic sections here. */
4371
b34976b6 4372static bfd_boolean
351f65ca
L		 4373elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4374 struct bfd_link_info *info,
4375 struct elf_link_hash_entry *h,
220cf809 4376 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
70256ad8 4377{
351f65ca 4378 struct elf_x86_64_link_hash_table *htab;
eed180f8
RM		 4379 const struct elf_x86_64_backend_data *const abed
4380 = get_elf_x86_64_backend_data (output_bfd);
70256ad8 4381
351f65ca 4382 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 4383 if (htab == NULL)
4384 return FALSE;
70256ad8
AJ		 4385
4386 if (h->plt.offset != (bfd_vma) -1)
4387 {
70256ad8
AJ		 4388 bfd_vma plt_index;
4389 bfd_vma got_offset;
4390 Elf_Internal_Rela rela;
947216bf 4391 bfd_byte *loc;
cbe950e9 4392 asection *plt, *gotplt, *relplt;
351f65ca 4393 const struct elf_backend_data *bed;
cbe950e9
L		 4394
4395 /* When building a static executable, use .iplt, .igot.plt and
4396 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 4397 if (htab->elf.splt != NULL)
cbe950e9 4398 {
6de2ae4a
L		 4399 plt = htab->elf.splt;
4400 gotplt = htab->elf.sgotplt;
4401 relplt = htab->elf.srelplt;
cbe950e9
L		 4402 }
4403 else
4404 {
6de2ae4a
L		 4405 plt = htab->elf.iplt;
4406 gotplt = htab->elf.igotplt;
4407 relplt = htab->elf.irelplt;
cbe950e9 4408 }
70256ad8
AJ		 4409
4410 /* This symbol has an entry in the procedure linkage table. Set
407443a3 4411 it up. */
cbe950e9
L		 4412 if ((h->dynindx == -1
4413 && !((h->forced_local || info->executable)
4414 && h->def_regular
4415 && h->type == STT_GNU_IFUNC))
4416 || plt == NULL
4417 || gotplt == NULL
4418 || relplt == NULL)
cec7f46a 4419 abort ();
70256ad8
AJ		 4420
4421 /* Get the index in the procedure linkage table which
4422 corresponds to this symbol. This is the index of this symbol
4423 in all the symbols for which we are making plt entries. The
cbe950e9 4424 first entry in the procedure linkage table is reserved.
6bbec505 4425
cbe950e9 4426 Get the offset into the .got table of the entry that
407443a3 4427 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
cbe950e9
L		 4428 bytes. The first three are reserved for the dynamic linker.
4429
4430 For static executables, we don't reserve anything. */
4431
6de2ae4a 4432 if (plt == htab->elf.splt)
cbe950e9 4433 {
eed180f8 4434 got_offset = h->plt.offset / abed->plt_entry_size - 1;
e1f98742 4435 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
cbe950e9
L		 4436 }
4437 else
4438 {
eed180f8 4439 got_offset = h->plt.offset / abed->plt_entry_size;
e1f98742 4440 got_offset = got_offset * GOT_ENTRY_SIZE;
cbe950e9 4441 }
70256ad8
AJ		 4442
4443 /* Fill in the entry in the procedure linkage table. */
eed180f8
RM		 4444 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
4445 abed->plt_entry_size);
4446
4447 /* Insert the relocation positions of the plt section. */
4448
4449 /* Put offset the PC-relative instruction referring to the GOT entry,
4450 subtracting the size of that instruction. */
653165cc 4451 bfd_put_32 (output_bfd,
eed180f8
RM		 4452 (gotplt->output_section->vma
4453 + gotplt->output_offset
4454 + got_offset
4455 - plt->output_section->vma
4456 - plt->output_offset
4457 - h->plt.offset
4458 - abed->plt_got_insn_size),
4459 plt->contents + h->plt.offset + abed->plt_got_offset);
cbe950e9 4460
653165cc 4461 /* Fill in the entry in the global offset table, initially this
eed180f8 4462 points to the second part of the PLT entry. */
cbe950e9
L		 4463 bfd_put_64 (output_bfd, (plt->output_section->vma
4464 + plt->output_offset
eed180f8 4465 + h->plt.offset + abed->plt_lazy_offset),
cbe950e9 4466 gotplt->contents + got_offset);
70256ad8
AJ		 4467
4468 /* Fill in the entry in the .rela.plt section. */
cbe950e9
L		 4469 rela.r_offset = (gotplt->output_section->vma
4470 + gotplt->output_offset
70256ad8 4471 + got_offset);
cbe950e9
L		 4472 if (h->dynindx == -1
4473 || ((info->executable
4474 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4475 && h->def_regular
4476 && h->type == STT_GNU_IFUNC))
4477 {
4478 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4479 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
351f65ca 4480 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
cbe950e9
L		 4481 rela.r_addend = (h->root.u.def.value
4482 + h->root.u.def.section->output_section->vma
4483 + h->root.u.def.section->output_offset);
e1f98742
L		 4484 /* R_X86_64_IRELATIVE comes last. */
4485 plt_index = htab->next_irelative_index--;
cbe950e9
L		 4486 }
4487 else
4488 {
351f65ca 4489 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
cbe950e9 4490 rela.r_addend = 0;
e1f98742
L		 4491 plt_index = htab->next_jump_slot_index++;
4492 }
4493
4494 /* Don't fill PLT entry for static executables. */
4495 if (plt == htab->elf.splt)
4496 {
4497 /* Put relocation index. */
4498 bfd_put_32 (output_bfd, plt_index,
eed180f8 4499 plt->contents + h->plt.offset + abed->plt_reloc_offset);
e1f98742 4500 /* Put offset for jmp .PLT0. */
eed180f8
RM		 4501 bfd_put_32 (output_bfd, - (h->plt.offset + abed->plt_plt_insn_end),
4502 plt->contents + h->plt.offset + abed->plt_plt_offset);
cbe950e9 4503 }
351f65ca
L		 4504
4505 bed = get_elf_backend_data (output_bfd);
4506 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
82e96e07 4507 bed->s->swap_reloca_out (output_bfd, &rela, loc);
70256ad8 4508
f5385ebf 4509 if (!h->def_regular)
70256ad8
AJ		 4510 {
4511 /* Mark the symbol as undefined, rather than as defined in
47a9f7b3
JJ		 4512 the .plt section. Leave the value if there were any
4513 relocations where pointer equality matters (this is a clue
c434dee6
AJ		 4514 for the dynamic linker, to make function pointer
4515 comparisons work between an application and shared
47a9f7b3
JJ		 4516 library), otherwise set it to zero. If a function is only
4517 called from a binary, there is no need to slow down
4518 shared libraries because of that. */
70256ad8 4519 sym->st_shndx = SHN_UNDEF;
f5385ebf 4520 if (!h->pointer_equality_needed)
47a9f7b3 4521 sym->st_value = 0;
70256ad8
AJ		 4522 }
4523 }
4524
bffbf940 4525 if (h->got.offset != (bfd_vma) -1
351f65ca
L		 4526 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
4527 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 4528 {
053579d7
AJ		 4529 Elf_Internal_Rela rela;
4530
4531 /* This symbol has an entry in the global offset table. Set it
bffbf940 4532 up. */
6de2ae4a 4533 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
c434dee6 4534 abort ();
053579d7 4535
6de2ae4a
L		 4536 rela.r_offset = (htab->elf.sgot->output_section->vma
4537 + htab->elf.sgot->output_offset
dc810e39 4538 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ		 4539
4540 /* If this is a static link, or it is a -Bsymbolic link and the
4541 symbol is defined locally or was forced to be local because
4542 of a version file, we just want to emit a RELATIVE reloc.
4543 The entry in the global offset table will already have been
4544 initialized in the relocate_section function. */
710ab287 4545 if (h->def_regular
0018b0a3
L		 4546 && h->type == STT_GNU_IFUNC)
4547 {
710ab287
L		 4548 if (info->shared)
4549 {
4550 /* Generate R_X86_64_GLOB_DAT. */
4551 goto do_glob_dat;
4552 }
4553 else
4554 {
90d60710
L		 4555 asection *plt;
4556
710ab287
L		 4557 if (!h->pointer_equality_needed)
4558 abort ();
4559
4560 /* For non-shared object, we can't use .got.plt, which
4561 contains the real function addres if we need pointer
4562 equality. We load the GOT entry with the PLT entry. */
90d60710 4563 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L		 4564 bfd_put_64 (output_bfd, (plt->output_section->vma
4565 + plt->output_offset
4566 + h->plt.offset),
6de2ae4a 4567 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 4568 return TRUE;
4569 }
0018b0a3
L		 4570 }
4571 else if (info->shared
4572 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 4573 {
41bed6dd
L		 4574 if (!h->def_regular)
4575 return FALSE;
cc78d0af 4576 BFD_ASSERT((h->got.offset & 1) != 0);
351f65ca 4577 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
053579d7
AJ		 4578 rela.r_addend = (h->root.u.def.value
4579 + h->root.u.def.section->output_section->vma
4580 + h->root.u.def.section->output_offset);
4581 }
4582 else
4583 {
4584 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 4585do_glob_dat:
c434dee6 4586 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 4587 htab->elf.sgot->contents + h->got.offset);
351f65ca 4588 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
053579d7
AJ		 4589 rela.r_addend = 0;
4590 }
4591
351f65ca 4592 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
053579d7
AJ		 4593 }
4594
f5385ebf 4595 if (h->needs_copy)
70256ad8 4596 {
70256ad8
AJ		 4597 Elf_Internal_Rela rela;
4598
4599 /* This symbol needs a copy reloc. Set it up. */
4600
c434dee6
AJ		 4601 if (h->dynindx == -1
4602 || (h->root.type != bfd_link_hash_defined
4603 && h->root.type != bfd_link_hash_defweak)
4604 || htab->srelbss == NULL)
4605 abort ();
70256ad8
AJ		 4606
4607 rela.r_offset = (h->root.u.def.value
4608 + h->root.u.def.section->output_section->vma
4609 + h->root.u.def.section->output_offset);
351f65ca 4610 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
70256ad8 4611 rela.r_addend = 0;
351f65ca 4612 elf_append_rela (output_bfd, htab->srelbss, &rela);
70256ad8
AJ		 4613 }
4614
b34976b6 4615 return TRUE;
70256ad8
AJ		 4616}
4617
c25bc9fc
L		 4618/* Finish up local dynamic symbol handling. We set the contents of
4619 various dynamic sections here. */
4620
4621static bfd_boolean
351f65ca 4622elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
c25bc9fc
L		 4623{
4624 struct elf_link_hash_entry *h
4625 = (struct elf_link_hash_entry *) *slot;
4626 struct bfd_link_info *info
eed180f8 4627 = (struct bfd_link_info *) inf;
c25bc9fc 4628
351f65ca 4629 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
c25bc9fc
L		 4630 info, h, NULL);
4631}
4632
c434dee6
AJ		 4633/* Used to decide how to sort relocs in an optimal manner for the
4634 dynamic linker, before writing them out. */
4635
4636static enum elf_reloc_type_class
351f65ca 4637elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
c434dee6 4638{
351f65ca 4639 switch ((int) ELF32_R_TYPE (rela->r_info))
c434dee6
AJ		 4640 {
4641 case R_X86_64_RELATIVE:
1da80baa 4642 case R_X86_64_RELATIVE64:
c434dee6
AJ		 4643 return reloc_class_relative;
4644 case R_X86_64_JUMP_SLOT:
4645 return reloc_class_plt;
4646 case R_X86_64_COPY:
4647 return reloc_class_copy;
4648 default:
4649 return reloc_class_normal;
4650 }
4651}
4652
70256ad8
AJ		 4653/* Finish up the dynamic sections. */
4654
b34976b6 4655static bfd_boolean
351f65ca
L		 4656elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
4657 struct bfd_link_info *info)
70256ad8 4658{
351f65ca 4659 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 4660 bfd *dynobj;
4661 asection *sdyn;
eed180f8
RM		 4662 const struct elf_x86_64_backend_data *const abed
4663 = get_elf_x86_64_backend_data (output_bfd);
70256ad8 4664
351f65ca 4665 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 4666 if (htab == NULL)
4667 return FALSE;
4668
c434dee6 4669 dynobj = htab->elf.dynobj;
3d4d4302 4670 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
70256ad8 4671
c434dee6 4672 if (htab->elf.dynamic_sections_created)
70256ad8 4673 {
82e96e07
L		 4674 bfd_byte *dyncon, *dynconend;
4675 const struct elf_backend_data *bed;
4676 bfd_size_type sizeof_dyn;
70256ad8 4677
6de2ae4a 4678 if (sdyn == NULL || htab->elf.sgot == NULL)
c434dee6 4679 abort ();
70256ad8 4680
82e96e07
L		 4681 bed = get_elf_backend_data (dynobj);
4682 sizeof_dyn = bed->s->sizeof_dyn;
4683 dyncon = sdyn->contents;
4684 dynconend = sdyn->contents + sdyn->size;
4685 for (; dyncon < dynconend; dyncon += sizeof_dyn)
70256ad8
AJ		 4686 {
4687 Elf_Internal_Dyn dyn;
70256ad8
AJ		 4688 asection *s;
4689
82e96e07 4690 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
70256ad8
AJ		 4691
4692 switch (dyn.d_tag)
4693 {
4694 default:
053579d7 4695 continue;
70256ad8
AJ		 4696
4697 case DT_PLTGOT:
6de2ae4a 4698 s = htab->elf.sgotplt;
8c37241b 4699 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
c434dee6 4700 break;
70256ad8
AJ		 4701
4702 case DT_JMPREL:
6de2ae4a 4703 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
c434dee6 4704 break;
70256ad8 4705
c434dee6 4706 case DT_PLTRELSZ:
6de2ae4a 4707 s = htab->elf.srelplt->output_section;
eea6121a 4708 dyn.d_un.d_val = s->size;
70256ad8
AJ		 4709 break;
4710
4711 case DT_RELASZ:
c434dee6
AJ		 4712 /* The procedure linkage table relocs (DT_JMPREL) should
4713 not be included in the overall relocs (DT_RELA).
4714 Therefore, we override the DT_RELASZ entry here to
4715 make it not include the JMPREL relocs. Since the
4716 linker script arranges for .rela.plt to follow all
4717 other relocation sections, we don't have to worry
4718 about changing the DT_RELA entry. */
6de2ae4a 4719 if (htab->elf.srelplt != NULL)
70256ad8 4720 {
6de2ae4a 4721 s = htab->elf.srelplt->output_section;
eea6121a 4722 dyn.d_un.d_val -= s->size;
70256ad8
AJ		 4723 }
4724 break;
67a4f2b7
AO		 4725
4726 case DT_TLSDESC_PLT:
6de2ae4a 4727 s = htab->elf.splt;
67a4f2b7
AO		 4728 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4729 + htab->tlsdesc_plt;
4730 break;
4731
4732 case DT_TLSDESC_GOT:
6de2ae4a 4733 s = htab->elf.sgot;
67a4f2b7
AO		 4734 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4735 + htab->tlsdesc_got;
4736 break;
70256ad8 4737 }
c434dee6 4738
82e96e07 4739 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
70256ad8
AJ		 4740 }
4741
c434dee6 4742 /* Fill in the special first entry in the procedure linkage table. */
6de2ae4a 4743 if (htab->elf.splt && htab->elf.splt->size > 0)
70256ad8 4744 {
653165cc 4745 /* Fill in the first entry in the procedure linkage table. */
eed180f8
RM		 4746 memcpy (htab->elf.splt->contents,
4747 abed->plt0_entry, abed->plt_entry_size);
653165cc
AJ		 4748 /* Add offset for pushq GOT+8(%rip), since the instruction
4749 uses 6 bytes subtract this value. */
4750 bfd_put_32 (output_bfd,
6de2ae4a
L		 4751 (htab->elf.sgotplt->output_section->vma
4752 + htab->elf.sgotplt->output_offset
653165cc 4753 + 8
6de2ae4a
L		 4754 - htab->elf.splt->output_section->vma
4755 - htab->elf.splt->output_offset
653165cc 4756 - 6),
eed180f8
RM		 4757 htab->elf.splt->contents + abed->plt0_got1_offset);
4758 /* Add offset for the PC-relative instruction accessing GOT+16,
4759 subtracting the offset to the end of that instruction. */
653165cc 4760 bfd_put_32 (output_bfd,
6de2ae4a
L		 4761 (htab->elf.sgotplt->output_section->vma
4762 + htab->elf.sgotplt->output_offset
653165cc 4763 + 16
6de2ae4a
L		 4764 - htab->elf.splt->output_section->vma
4765 - htab->elf.splt->output_offset
eed180f8
RM		 4766 - abed->plt0_got2_insn_end),
4767 htab->elf.splt->contents + abed->plt0_got2_offset);
653165cc 4768
eed180f8
RM		 4769 elf_section_data (htab->elf.splt->output_section)
4770 ->this_hdr.sh_entsize = abed->plt_entry_size;
67a4f2b7
AO		 4771
4772 if (htab->tlsdesc_plt)
4773 {
4774 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 4775 htab->elf.sgot->contents + htab->tlsdesc_got);
67a4f2b7 4776
6de2ae4a 4777 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
eed180f8 4778 abed->plt0_entry, abed->plt_entry_size);
67a4f2b7
AO		 4779
4780 /* Add offset for pushq GOT+8(%rip), since the
4781 instruction uses 6 bytes subtract this value. */
4782 bfd_put_32 (output_bfd,
6de2ae4a
L		 4783 (htab->elf.sgotplt->output_section->vma
4784 + htab->elf.sgotplt->output_offset
67a4f2b7 4785 + 8
6de2ae4a
L		 4786 - htab->elf.splt->output_section->vma
4787 - htab->elf.splt->output_offset
67a4f2b7
AO		 4788 - htab->tlsdesc_plt
4789 - 6),
eed180f8
RM		 4790 htab->elf.splt->contents
4791 + htab->tlsdesc_plt + abed->plt0_got1_offset);
4792 /* Add offset for the PC-relative instruction accessing GOT+TDG,
4793 where TGD stands for htab->tlsdesc_got, subtracting the offset
4794 to the end of that instruction. */
67a4f2b7 4795 bfd_put_32 (output_bfd,
6de2ae4a
L		 4796 (htab->elf.sgot->output_section->vma
4797 + htab->elf.sgot->output_offset
67a4f2b7 4798 + htab->tlsdesc_got
6de2ae4a
L		 4799 - htab->elf.splt->output_section->vma
4800 - htab->elf.splt->output_offset
67a4f2b7 4801 - htab->tlsdesc_plt
eed180f8
RM		 4802 - abed->plt0_got2_insn_end),
4803 htab->elf.splt->contents
4804 + htab->tlsdesc_plt + abed->plt0_got2_offset);
67a4f2b7 4805 }
70256ad8 4806 }
70256ad8
AJ		 4807 }
4808
6de2ae4a 4809 if (htab->elf.sgotplt)
70256ad8 4810 {
56d4289c
L		 4811 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4812 {
4813 (*_bfd_error_handler)
4814 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4815 return FALSE;
4816 }
4817
c434dee6 4818 /* Fill in the first three entries in the global offset table. */
6de2ae4a 4819 if (htab->elf.sgotplt->size > 0)
c434dee6
AJ		 4820 {
4821 /* Set the first entry in the global offset table to the address of
4822 the dynamic section. */
4823 if (sdyn == NULL)
6de2ae4a 4824 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
c434dee6
AJ		 4825 else
4826 bfd_put_64 (output_bfd,
4827 sdyn->output_section->vma + sdyn->output_offset,
6de2ae4a 4828 htab->elf.sgotplt->contents);
c434dee6 4829 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6de2ae4a
L		 4830 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
4831 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
c434dee6 4832 }
70256ad8 4833
6de2ae4a 4834 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
c434dee6
AJ		 4835 GOT_ENTRY_SIZE;
4836 }
70256ad8 4837
e41b3a13 4838 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 4839 if (htab->plt_eh_frame != NULL
4840 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 4841 {
4842 if (htab->elf.splt != NULL
4843 && htab->elf.splt->size != 0
4844 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4845 && htab->elf.splt->output_section != NULL
4846 && htab->plt_eh_frame->output_section != NULL)
4847 {
4848 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4849 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4850 + htab->plt_eh_frame->output_offset
4851 + PLT_FDE_START_OFFSET;
4852 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4853 htab->plt_eh_frame->contents
4854 + PLT_FDE_START_OFFSET);
4855 }
dbaa2011 4856 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 4857 {
4858 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4859 htab->plt_eh_frame,
4860 htab->plt_eh_frame->contents))
4861 return FALSE;
4862 }
4863 }
4864
6de2ae4a
L		 4865 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4866 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
8c37241b
JJ		 4867 = GOT_ENTRY_SIZE;
4868
c25bc9fc
L		 4869 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4870 htab_traverse (htab->loc_hash_table,
351f65ca 4871 elf_x86_64_finish_local_dynamic_symbol,
c25bc9fc
L		 4872 info);
4873
b34976b6 4874 return TRUE;
8d88c4ca
NC		 4875}
4876
4c45e5c9
JJ		 4877/* Return address for Ith PLT stub in section PLT, for relocation REL
4878 or (bfd_vma) -1 if it should not be included. */
4879
4880static bfd_vma
351f65ca
L		 4881elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
4882 const arelent *rel ATTRIBUTE_UNUSED)
4c45e5c9 4883{
eed180f8 4884 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
4c45e5c9 4885}
8df9fc9d 4886
d2b2c203
DJ		 4887/* Handle an x86-64 specific section when reading an object file. This
4888 is called when elfcode.h finds a section with an unknown type. */
4889
4890static bfd_boolean
351f65ca 4891elf_x86_64_section_from_shdr (bfd *abfd,
6dc132d9
L		 4892 Elf_Internal_Shdr *hdr,
4893 const char *name,
4894 int shindex)
d2b2c203
DJ		 4895{
4896 if (hdr->sh_type != SHT_X86_64_UNWIND)
4897 return FALSE;
4898
6dc132d9 4899 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
d2b2c203
DJ		 4900 return FALSE;
4901
4902 return TRUE;
4903}
4904
3b22753a
L		 4905/* Hook called by the linker routine which adds symbols from an object
4906 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4907 of .bss. */
4908
4909static bfd_boolean
351f65ca
L		 4910elf_x86_64_add_symbol_hook (bfd *abfd,
4911 struct bfd_link_info *info,
4912 Elf_Internal_Sym *sym,
4913 const char **namep ATTRIBUTE_UNUSED,
4914 flagword *flagsp ATTRIBUTE_UNUSED,
4915 asection **secp,
4916 bfd_vma *valp)
3b22753a
L		 4917{
4918 asection *lcomm;
4919
4920 switch (sym->st_shndx)
4921 {
4922 case SHN_X86_64_LCOMMON:
4923 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
4924 if (lcomm == NULL)
4925 {
4926 lcomm = bfd_make_section_with_flags (abfd,
4927 "LARGE_COMMON",
4928 (SEC_ALLOC
4929 | SEC_IS_COMMON
4930 | SEC_LINKER_CREATED));
4931 if (lcomm == NULL)
4932 return FALSE;
4933 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
4934 }
4935 *secp = lcomm;
4936 *valp = sym->st_size;
c35bdf6e 4937 return TRUE;
3b22753a 4938 }
d8045f23 4939
c16153ae 4940 if ((abfd->flags & DYNAMIC) == 0
f64b2e8d
NC		 4941 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
4942 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
4943 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
d8045f23 4944
3b22753a
L		 4945 return TRUE;
4946}
4947
4948
4949/* Given a BFD section, try to locate the corresponding ELF section
4950 index. */
4951
4952static bfd_boolean
351f65ca
L		 4953elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
4954 asection *sec, int *index_return)
3b22753a
L		 4955{
4956 if (sec == &_bfd_elf_large_com_section)
4957 {
91d6fa6a 4958 *index_return = SHN_X86_64_LCOMMON;
3b22753a
L		 4959 return TRUE;
4960 }
4961 return FALSE;
4962}
4963
4964/* Process a symbol. */
4965
4966static void
351f65ca
L		 4967elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
4968 asymbol *asym)
3b22753a
L		 4969{
4970 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
4971
4972 switch (elfsym->internal_elf_sym.st_shndx)
4973 {
4974 case SHN_X86_64_LCOMMON:
4975 asym->section = &_bfd_elf_large_com_section;
4976 asym->value = elfsym->internal_elf_sym.st_size;
4977 /* Common symbol doesn't set BSF_GLOBAL. */
4978 asym->flags &= ~BSF_GLOBAL;
4979 break;
4980 }
4981}
4982
4983static bfd_boolean
351f65ca 4984elf_x86_64_common_definition (Elf_Internal_Sym *sym)
3b22753a
L		 4985{
4986 return (sym->st_shndx == SHN_COMMON
4987 || sym->st_shndx == SHN_X86_64_LCOMMON);
4988}
4989
4990static unsigned int
351f65ca 4991elf_x86_64_common_section_index (asection *sec)
3b22753a
L		 4992{
4993 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
4994 return SHN_COMMON;
4995 else
4996 return SHN_X86_64_LCOMMON;
4997}
4998
4999static asection *
351f65ca 5000elf_x86_64_common_section (asection *sec)
3b22753a
L		 5001{
5002 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5003 return bfd_com_section_ptr;
5004 else
5005 return &_bfd_elf_large_com_section;
5006}
5007
5008static bfd_boolean
351f65ca
L		 5009elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
5010 struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED,
5011 struct elf_link_hash_entry *h,
5012 Elf_Internal_Sym *sym,
5013 asection **psec,
5014 bfd_vma *pvalue ATTRIBUTE_UNUSED,
5015 unsigned int *pold_alignment ATTRIBUTE_UNUSED,
5016 bfd_boolean *skip ATTRIBUTE_UNUSED,
5017 bfd_boolean *override ATTRIBUTE_UNUSED,
5018 bfd_boolean *type_change_ok ATTRIBUTE_UNUSED,
5019 bfd_boolean *size_change_ok ATTRIBUTE_UNUSED,
71e7aa7d
L		 5020 bfd_boolean *newdyn ATTRIBUTE_UNUSED,
5021 bfd_boolean *newdef,
351f65ca
L		 5022 bfd_boolean *newdyncommon ATTRIBUTE_UNUSED,
5023 bfd_boolean *newweak ATTRIBUTE_UNUSED,
5024 bfd *abfd ATTRIBUTE_UNUSED,
5025 asection **sec,
71e7aa7d
L		 5026 bfd_boolean *olddyn ATTRIBUTE_UNUSED,
5027 bfd_boolean *olddef,
351f65ca
L		 5028 bfd_boolean *olddyncommon ATTRIBUTE_UNUSED,
5029 bfd_boolean *oldweak ATTRIBUTE_UNUSED,
5030 bfd *oldbfd,
5031 asection **oldsec)
3b22753a
L		 5032{
5033 /* A normal common symbol and a large common symbol result in a
00492999
L		 5034 normal common symbol. We turn the large common symbol into a
5035 normal one. */
71e7aa7d 5036 if (!*olddef
3b22753a 5037 && h->root.type == bfd_link_hash_common
71e7aa7d 5038 && !*newdef
3b22753a 5039 && bfd_is_com_section (*sec)
00492999 5040 && *oldsec != *sec)
3b22753a 5041 {
00492999
L		 5042 if (sym->st_shndx == SHN_COMMON
5043 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0)
5044 {
5045 h->root.u.c.p->section
5046 = bfd_make_section_old_way (oldbfd, "COMMON");
5047 h->root.u.c.p->section->flags = SEC_ALLOC;
5048 }
5049 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5050 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0)
9a2e389a 5051 *psec = *sec = bfd_com_section_ptr;
3b22753a
L		 5052 }
5053
5054 return TRUE;
5055}
5056
5057static int
351f65ca
L		 5058elf_x86_64_additional_program_headers (bfd *abfd,
5059 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3b22753a
L		 5060{
5061 asection *s;
9a2e389a 5062 int count = 0;
3b22753a
L		 5063
5064 /* Check to see if we need a large readonly segment. */
5065 s = bfd_get_section_by_name (abfd, ".lrodata");
5066 if (s && (s->flags & SEC_LOAD))
5067 count++;
5068
5069 /* Check to see if we need a large data segment. Since .lbss sections
5070 is placed right after the .bss section, there should be no need for
5071 a large data segment just because of .lbss. */
5072 s = bfd_get_section_by_name (abfd, ".ldata");
5073 if (s && (s->flags & SEC_LOAD))
5074 count++;
5075
5076 return count;
5077}
5078
fdc90cb4
JJ		 5079/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5080
5081static bfd_boolean
351f65ca 5082elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
fdc90cb4
JJ		 5083{
5084 if (h->plt.offset != (bfd_vma) -1
5085 && !h->def_regular
5086 && !h->pointer_equality_needed)
5087 return FALSE;
5088
5089 return _bfd_elf_hash_symbol (h);
5090}
5091
c543bf9a
L		 5092/* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5093
5094static bfd_boolean
5095elf_x86_64_relocs_compatible (const bfd_target *input,
5096 const bfd_target *output)
5097{
5098 return ((xvec_get_elf_backend_data (input)->s->elfclass
5099 == xvec_get_elf_backend_data (output)->s->elfclass)
5100 && _bfd_elf_relocs_compatible (input, output));
5101}
5102
9a2e389a 5103static const struct bfd_elf_special_section
351f65ca 5104 elf_x86_64_special_sections[]=
3b22753a 5105{
0112cd26
NC		 5106 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5107 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5108 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
5109 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5110 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5111 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5112 { NULL, 0, 0, 0, 0 }
3b22753a
L		 5113};
5114
70256ad8
AJ		 5115#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
5116#define TARGET_LITTLE_NAME "elf64-x86-64"
5117#define ELF_ARCH bfd_arch_i386
ae95ffa6 5118#define ELF_TARGET_ID X86_64_ELF_DATA
70256ad8 5119#define ELF_MACHINE_CODE EM_X86_64
f7661549 5120#define ELF_MAXPAGESIZE 0x200000
2043964e 5121#define ELF_MINPAGESIZE 0x1000
24718e3b 5122#define ELF_COMMONPAGESIZE 0x1000
70256ad8
AJ		 5123
5124#define elf_backend_can_gc_sections 1
51b64d56 5125#define elf_backend_can_refcount 1
70256ad8
AJ		 5126#define elf_backend_want_got_plt 1
5127#define elf_backend_plt_readonly 1
5128#define elf_backend_want_plt_sym 0
5129#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 5130#define elf_backend_rela_normal 1
e41b3a13 5131#define elf_backend_plt_alignment 4
70256ad8 5132
351f65ca 5133#define elf_info_to_howto elf_x86_64_info_to_howto
70256ad8 5134
70256ad8 5135#define bfd_elf64_bfd_link_hash_table_create \
351f65ca 5136 elf_x86_64_link_hash_table_create
c25bc9fc 5137#define bfd_elf64_bfd_link_hash_table_free \
351f65ca
L		 5138 elf_x86_64_link_hash_table_free
5139#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
157090f7 5140#define bfd_elf64_bfd_reloc_name_lookup \
351f65ca 5141 elf_x86_64_reloc_name_lookup
70256ad8 5142
351f65ca 5143#define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
c543bf9a 5144#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
351f65ca
L		 5145#define elf_backend_check_relocs elf_x86_64_check_relocs
5146#define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5147#define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5148#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5149#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5150#define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5151#define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5152#define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5153#define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
8fd79e71
L		 5154#ifdef CORE_HEADER
5155#define elf_backend_write_core_note elf_x86_64_write_core_note
5156#endif
351f65ca
L		 5157#define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5158#define elf_backend_relocate_section elf_x86_64_relocate_section
5159#define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5160#define elf_backend_always_size_sections elf_x86_64_always_size_sections
74541ad4 5161#define elf_backend_init_index_section _bfd_elf_init_1_index_section
351f65ca 5162#define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
407443a3 5163#define elf_backend_object_p elf64_x86_64_elf_object_p
351f65ca 5164#define bfd_elf64_mkobject elf_x86_64_mkobject
8d88c4ca 5165
d2b2c203 5166#define elf_backend_section_from_shdr \
351f65ca 5167 elf_x86_64_section_from_shdr
d2b2c203 5168
3b22753a 5169#define elf_backend_section_from_bfd_section \
351f65ca 5170 elf_x86_64_elf_section_from_bfd_section
3b22753a 5171#define elf_backend_add_symbol_hook \
351f65ca 5172 elf_x86_64_add_symbol_hook
3b22753a 5173#define elf_backend_symbol_processing \
351f65ca 5174 elf_x86_64_symbol_processing
3b22753a 5175#define elf_backend_common_section_index \
351f65ca 5176 elf_x86_64_common_section_index
3b22753a 5177#define elf_backend_common_section \
351f65ca 5178 elf_x86_64_common_section
3b22753a 5179#define elf_backend_common_definition \
351f65ca 5180 elf_x86_64_common_definition
3b22753a 5181#define elf_backend_merge_symbol \
351f65ca 5182 elf_x86_64_merge_symbol
3b22753a 5183#define elf_backend_special_sections \
351f65ca 5184 elf_x86_64_special_sections
3b22753a 5185#define elf_backend_additional_program_headers \
351f65ca 5186 elf_x86_64_additional_program_headers
fdc90cb4 5187#define elf_backend_hash_symbol \
351f65ca 5188 elf_x86_64_hash_symbol
3b22753a 5189
d8045f23
NC		 5190#define elf_backend_post_process_headers _bfd_elf_set_osabi
5191
8d88c4ca 5192#include "elf64-target.h"
9d7cbccd
NC		 5193
5194/* FreeBSD support. */
5195
5196#undef TARGET_LITTLE_SYM
5197#define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
5198#undef TARGET_LITTLE_NAME
5199#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5200
d1036acb
L		 5201#undef ELF_OSABI
5202#define ELF_OSABI ELFOSABI_FREEBSD
9d7cbccd 5203
9d7cbccd
NC		 5204#undef elf64_bed
5205#define elf64_bed elf64_x86_64_fbsd_bed
5206
5207#include "elf64-target.h"
8a9036a4 5208
a6cc6b3b
RO		 5209/* Solaris 2 support. */
5210
5211#undef TARGET_LITTLE_SYM
5212#define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
5213#undef TARGET_LITTLE_NAME
5214#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5215
5216/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5217 objects won't be recognized. */
5218#undef ELF_OSABI
5219
5220#undef elf64_bed
5221#define elf64_bed elf64_x86_64_sol2_bed
5222
7dc98aea
RO		 5223/* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5224 boundary. */
5225#undef elf_backend_static_tls_alignment
5226#define elf_backend_static_tls_alignment 16
5227
a6cc6b3b
RO		 5228/* The Solaris 2 ABI requires a plt symbol on all platforms.
5229
5230 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5231 File, p.63. */
5232#undef elf_backend_want_plt_sym
5233#define elf_backend_want_plt_sym 1
5234
5235#include "elf64-target.h"
5236
8059fb19
RM		 5237/* Native Client support. */
5238
5239#undef TARGET_LITTLE_SYM
5240#define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
5241#undef TARGET_LITTLE_NAME
5242#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5243#undef elf64_bed
5244#define elf64_bed elf64_x86_64_nacl_bed
5245
5246#undef ELF_MAXPAGESIZE
5247#undef ELF_MINPAGESIZE
5248#undef ELF_COMMONPAGESIZE
5249#define ELF_MAXPAGESIZE 0x10000
5250#define ELF_MINPAGESIZE 0x10000
5251#define ELF_COMMONPAGESIZE 0x10000
5252
5253/* Restore defaults. */
5254#undef ELF_OSABI
5255#undef elf_backend_static_tls_alignment
5256#undef elf_backend_want_plt_sym
5257#define elf_backend_want_plt_sym 0
5258
5259/* NaCl uses substantially different PLT entries for the same effects. */
5260
5261#undef elf_backend_plt_alignment
5262#define elf_backend_plt_alignment 5
5263#define NACL_PLT_ENTRY_SIZE 64
5264#define NACLMASK 0xe0 /* 32-byte alignment mask. */
5265
5266static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
5267 {
5268 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5269 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5270 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5271 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5272 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5273
ea2d813e
RM		 5274 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5275 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */
5276
5277 /* 32 bytes of nop to pad out to the standard size. */
8059fb19
RM		 5278 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5279 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5280 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5281 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
ea2d813e
RM		 5282 0x66, /* excess data32 prefix */
5283 0x90 /* nop */
8059fb19
RM		 5284 };
5285
5286static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5287 {
5288 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5289 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5290 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5291 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5292
5293 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5294 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5295 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5296
5297 /* Lazy GOT entries point here (32-byte aligned). */
5298 0x68, /* pushq immediate */
5299 0, 0, 0, 0, /* replaced with index into relocation table. */
5300 0xe9, /* jmp relative */
5301 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5302
5303 /* 22 bytes of nop to pad out to the standard size. */
5304 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5305 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5306 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5307 };
5308
5309/* .eh_frame covering the .plt section. */
5310
5311static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
5312 {
5313#if (PLT_CIE_LENGTH != 20 \
5314 || PLT_FDE_LENGTH != 36 \
5315 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5316 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5317# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5318#endif
5319 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5320 0, 0, 0, 0, /* CIE ID */
5321 1, /* CIE version */
5322 'z', 'R', 0, /* Augmentation string */
5323 1, /* Code alignment factor */
5324 0x78, /* Data alignment factor */
5325 16, /* Return address column */
5326 1, /* Augmentation size */
5327 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5328 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5329 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5330 DW_CFA_nop, DW_CFA_nop,
5331
5332 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5333 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
5334 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5335 0, 0, 0, 0, /* .plt size goes here */
5336 0, /* Augmentation size */
5337 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
5338 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5339 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
5340 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5341 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5342 13, /* Block length */
5343 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
5344 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
5345 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5346 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
5347 DW_CFA_nop, DW_CFA_nop
5348 };
5349
5350static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
5351 {
5352 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
5353 elf_x86_64_nacl_plt_entry, /* plt_entry */
5354 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5355 2, /* plt0_got1_offset */
5356 9, /* plt0_got2_offset */
5357 13, /* plt0_got2_insn_end */
5358 3, /* plt_got_offset */
5359 33, /* plt_reloc_offset */
5360 38, /* plt_plt_offset */
5361 7, /* plt_got_insn_size */
5362 42, /* plt_plt_insn_end */
5363 32, /* plt_lazy_offset */
5364 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
5365 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
5366 };
5367
5368#undef elf_backend_arch_data
5369#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5370
5a68afcf
RM		 5371#undef elf_backend_modify_segment_map
5372#define elf_backend_modify_segment_map nacl_modify_segment_map
5373#undef elf_backend_modify_program_headers
5374#define elf_backend_modify_program_headers nacl_modify_program_headers
5375
8059fb19
RM		 5376#include "elf64-target.h"
5377
5378/* Native Client x32 support. */
5379
5380#undef TARGET_LITTLE_SYM
5381#define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
5382#undef TARGET_LITTLE_NAME
5383#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5384#undef elf32_bed
5385#define elf32_bed elf32_x86_64_nacl_bed
5386
5387#define bfd_elf32_bfd_link_hash_table_create \
5388 elf_x86_64_link_hash_table_create
5389#define bfd_elf32_bfd_link_hash_table_free \
5390 elf_x86_64_link_hash_table_free
5391#define bfd_elf32_bfd_reloc_type_lookup \
5392 elf_x86_64_reloc_type_lookup
5393#define bfd_elf32_bfd_reloc_name_lookup \
5394 elf_x86_64_reloc_name_lookup
5395#define bfd_elf32_mkobject \
5396 elf_x86_64_mkobject
5397
5398#undef elf_backend_object_p
5399#define elf_backend_object_p \
5400 elf32_x86_64_elf_object_p
5401
5402#undef elf_backend_bfd_from_remote_memory
5403#define elf_backend_bfd_from_remote_memory \
5404 _bfd_elf32_bfd_from_remote_memory
5405
5406#undef elf_backend_size_info
5407#define elf_backend_size_info \
5408 _bfd_elf32_size_info
5409
5410#include "elf32-target.h"
5411
5412/* Restore defaults. */
5a68afcf 5413#undef elf_backend_object_p
8059fb19 5414#define elf_backend_object_p elf64_x86_64_elf_object_p
5a68afcf
RM		 5415#undef elf_backend_bfd_from_remote_memory
5416#undef elf_backend_size_info
5417#undef elf_backend_modify_segment_map
5418#undef elf_backend_modify_program_headers
8059fb19 5419
8a9036a4
L		 5420/* Intel L1OM support. */
5421
5422static bfd_boolean
5423elf64_l1om_elf_object_p (bfd *abfd)
5424{
5425 /* Set the right machine number for an L1OM elf64 file. */
5426 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5427 return TRUE;
5428}
5429
5430#undef TARGET_LITTLE_SYM
5431#define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5432#undef TARGET_LITTLE_NAME
5433#define TARGET_LITTLE_NAME "elf64-l1om"
5434#undef ELF_ARCH
5435#define ELF_ARCH bfd_arch_l1om
5436
5437#undef ELF_MACHINE_CODE
5438#define ELF_MACHINE_CODE EM_L1OM
5439
5440#undef ELF_OSABI
5441
5442#undef elf64_bed
5443#define elf64_bed elf64_l1om_bed
5444
5445#undef elf_backend_object_p
5446#define elf_backend_object_p elf64_l1om_elf_object_p
5447
8059fb19
RM		 5448/* Restore defaults. */
5449#undef ELF_MAXPAGESIZE
5450#undef ELF_MINPAGESIZE
5451#undef ELF_COMMONPAGESIZE
5452#define ELF_MAXPAGESIZE 0x200000
5453#define ELF_MINPAGESIZE 0x1000
5454#define ELF_COMMONPAGESIZE 0x1000
5455#undef elf_backend_plt_alignment
5456#define elf_backend_plt_alignment 4
5457#undef elf_backend_arch_data
5458#define elf_backend_arch_data &elf_x86_64_arch_bed
1a0c107f 5459
8a9036a4
L		 5460#include "elf64-target.h"
5461
5462/* FreeBSD L1OM support. */
5463
5464#undef TARGET_LITTLE_SYM
5465#define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5466#undef TARGET_LITTLE_NAME
5467#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5468
5469#undef ELF_OSABI
5470#define ELF_OSABI ELFOSABI_FREEBSD
5471
5472#undef elf64_bed
5473#define elf64_bed elf64_l1om_fbsd_bed
5474
8a9036a4 5475#include "elf64-target.h"
351f65ca 5476
7a9068fe
L		 5477/* Intel K1OM support. */
5478
5479static bfd_boolean
5480elf64_k1om_elf_object_p (bfd *abfd)
5481{
5482 /* Set the right machine number for an K1OM elf64 file. */
5483 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
5484 return TRUE;
5485}
5486
5487#undef TARGET_LITTLE_SYM
5488#define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
5489#undef TARGET_LITTLE_NAME
5490#define TARGET_LITTLE_NAME "elf64-k1om"
5491#undef ELF_ARCH
5492#define ELF_ARCH bfd_arch_k1om
5493
5494#undef ELF_MACHINE_CODE
5495#define ELF_MACHINE_CODE EM_K1OM
5496
5497#undef ELF_OSABI
5498
5499#undef elf64_bed
5500#define elf64_bed elf64_k1om_bed
5501
5502#undef elf_backend_object_p
5503#define elf_backend_object_p elf64_k1om_elf_object_p
5504
5505#undef elf_backend_static_tls_alignment
5506
5507#undef elf_backend_want_plt_sym
5508#define elf_backend_want_plt_sym 0
5509
5510#include "elf64-target.h"
5511
5512/* FreeBSD K1OM support. */
5513
5514#undef TARGET_LITTLE_SYM
5515#define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
5516#undef TARGET_LITTLE_NAME
5517#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5518
5519#undef ELF_OSABI
5520#define ELF_OSABI ELFOSABI_FREEBSD
5521
5522#undef elf64_bed
5523#define elf64_bed elf64_k1om_fbsd_bed
5524
5525#include "elf64-target.h"
5526
351f65ca
L		 5527/* 32bit x86-64 support. */
5528
351f65ca
L		 5529#undef TARGET_LITTLE_SYM
5530#define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5531#undef TARGET_LITTLE_NAME
5532#define TARGET_LITTLE_NAME "elf32-x86-64"
8059fb19 5533#undef elf32_bed
351f65ca
L		 5534
5535#undef ELF_ARCH
5536#define ELF_ARCH bfd_arch_i386
5537
5538#undef ELF_MACHINE_CODE
5539#define ELF_MACHINE_CODE EM_X86_64
5540
351f65ca
L		 5541#undef ELF_OSABI
5542
351f65ca
L		 5543#undef elf_backend_object_p
5544#define elf_backend_object_p \
5545 elf32_x86_64_elf_object_p
5546
5547#undef elf_backend_bfd_from_remote_memory
5548#define elf_backend_bfd_from_remote_memory \
5549 _bfd_elf32_bfd_from_remote_memory
5550
5551#undef elf_backend_size_info
5552#define elf_backend_size_info \
5553 _bfd_elf32_size_info
5554
5555#include "elf32-target.h"
GDB Binutils - Deliverables
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