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gdb.base/ldbl_e308.exp: Do not allow "inf" in value output.
[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 {
452 prpsinfo_t data;
453 memset (&data, 0, sizeof (data));
454 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
455 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
e85c6a70
JK		 456 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
457 &data, sizeof (data));
8fd79e71 458 }
e85c6a70 459 /* NOTREACHED */
8fd79e71
L		 460
461 case NT_PRSTATUS:
462 va_start (ap, note_type);
463 pid = va_arg (ap, long);
464 cursig = va_arg (ap, int);
465 gregs = va_arg (ap, const void *);
466 va_end (ap);
467
468 if (bed->s->elfclass == ELFCLASS32)
469 {
470 if (bed->elf_machine_code == EM_X86_64)
471 {
472 prstatusx32_t prstat;
473 memset (&prstat, 0, sizeof (prstat));
474 prstat.pr_pid = pid;
475 prstat.pr_cursig = cursig;
476 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 477 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
478 &prstat, sizeof (prstat));
8fd79e71
L		 479 }
480 else
481 {
482 prstatus32_t prstat;
483 memset (&prstat, 0, sizeof (prstat));
484 prstat.pr_pid = pid;
485 prstat.pr_cursig = cursig;
486 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 487 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
488 &prstat, sizeof (prstat));
8fd79e71
L		 489 }
490 }
491 else
492 {
493 prstatus_t prstat;
494 memset (&prstat, 0, sizeof (prstat));
495 prstat.pr_pid = pid;
496 prstat.pr_cursig = cursig;
497 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
e85c6a70
JK		 498 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
499 &prstat, sizeof (prstat));
8fd79e71 500 }
8fd79e71 501 }
e85c6a70 502 /* NOTREACHED */
8fd79e71
L		 503}
504#endif
3bab7989 505\f
407443a3 506/* Functions for the x86-64 ELF linker. */
70256ad8 507
407443a3 508/* The name of the dynamic interpreter. This is put in the .interp
70256ad8
AJ		 509 section. */
510
351f65ca 511#define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
eec9dd95 512#define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
70256ad8 513
d40d037c
AJ		 514/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
515 copying dynamic variables from a shared lib into an app's dynbss
516 section, and instead use a dynamic relocation to point into the
517 shared lib. */
518#define ELIMINATE_COPY_RELOCS 1
519
70256ad8
AJ		 520/* The size in bytes of an entry in the global offset table. */
521
522#define GOT_ENTRY_SIZE 8
8d88c4ca 523
70256ad8 524/* The size in bytes of an entry in the procedure linkage table. */
8d88c4ca 525
70256ad8
AJ		 526#define PLT_ENTRY_SIZE 16
527
528/* The first entry in a procedure linkage table looks like this. See the
529 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
530
351f65ca 531static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
70256ad8 532{
653165cc
AJ		 533 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
534 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
10efb593 535 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
70256ad8
AJ		 536};
537
538/* Subsequent entries in a procedure linkage table look like this. */
539
351f65ca 540static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
70256ad8 541{
653165cc 542 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
407443a3 543 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653165cc 544 0x68, /* pushq immediate */
70256ad8
AJ		 545 0, 0, 0, 0, /* replaced with index into relocation table. */
546 0xe9, /* jmp relative */
547 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
548};
549
e41b3a13
JJ		 550/* .eh_frame covering the .plt section. */
551
552static const bfd_byte elf_x86_64_eh_frame_plt[] =
553{
554#define PLT_CIE_LENGTH 20
555#define PLT_FDE_LENGTH 36
556#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
557#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
558 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
559 0, 0, 0, 0, /* CIE ID */
560 1, /* CIE version */
561 'z', 'R', 0, /* Augmentation string */
562 1, /* Code alignment factor */
563 0x78, /* Data alignment factor */
564 16, /* Return address column */
565 1, /* Augmentation size */
566 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
567 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
568 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
569 DW_CFA_nop, DW_CFA_nop,
570
571 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
572 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
573 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
574 0, 0, 0, 0, /* .plt size goes here */
575 0, /* Augmentation size */
576 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
577 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
578 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
579 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
580 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
581 11, /* Block length */
582 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
583 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
584 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
585 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
586 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
587};
588
eed180f8
RM		 589/* Architecture-specific backend data for x86-64. */
590
591struct elf_x86_64_backend_data
592{
593 /* Templates for the initial PLT entry and for subsequent entries. */
594 const bfd_byte *plt0_entry;
595 const bfd_byte *plt_entry;
596 unsigned int plt_entry_size; /* Size of each PLT entry. */
597
598 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
599 unsigned int plt0_got1_offset;
600 unsigned int plt0_got2_offset;
601
602 /* Offset of the end of the PC-relative instruction containing
603 plt0_got2_offset. */
604 unsigned int plt0_got2_insn_end;
605
606 /* Offsets into plt_entry that are to be replaced with... */
607 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
608 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
609 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
610
611 /* Length of the PC-relative instruction containing plt_got_offset. */
612 unsigned int plt_got_insn_size;
613
614 /* Offset of the end of the PC-relative jump to plt0_entry. */
615 unsigned int plt_plt_insn_end;
616
617 /* Offset into plt_entry where the initial value of the GOT entry points. */
618 unsigned int plt_lazy_offset;
619
620 /* .eh_frame covering the .plt section. */
621 const bfd_byte *eh_frame_plt;
622 unsigned int eh_frame_plt_size;
623};
624
625#define get_elf_x86_64_backend_data(abfd) \
626 ((const struct elf_x86_64_backend_data *) \
627 get_elf_backend_data (abfd)->arch_data)
628
629#define GET_PLT_ENTRY_SIZE(abfd) \
630 get_elf_x86_64_backend_data (abfd)->plt_entry_size
631
632/* These are the standard parameters. */
633static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
634 {
635 elf_x86_64_plt0_entry, /* plt0_entry */
636 elf_x86_64_plt_entry, /* plt_entry */
637 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
638 2, /* plt0_got1_offset */
639 8, /* plt0_got2_offset */
640 12, /* plt0_got2_insn_end */
641 2, /* plt_got_offset */
642 7, /* plt_reloc_offset */
643 12, /* plt_plt_offset */
644 6, /* plt_got_insn_size */
645 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
646 6, /* plt_lazy_offset */
647 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
648 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
649 };
650
651#define elf_backend_arch_data &elf_x86_64_arch_bed
652
70256ad8
AJ		 653/* x86-64 ELF linker hash entry. */
654
351f65ca 655struct elf_x86_64_link_hash_entry
70256ad8 656{
c434dee6 657 struct elf_link_hash_entry elf;
70256ad8 658
c434dee6 659 /* Track dynamic relocs copied for this symbol. */
e03a8ed8 660 struct elf_dyn_relocs *dyn_relocs;
bffbf940
JJ		 661
662#define GOT_UNKNOWN 0
663#define GOT_NORMAL 1
664#define GOT_TLS_GD 2
665#define GOT_TLS_IE 3
67a4f2b7
AO		 666#define GOT_TLS_GDESC 4
667#define GOT_TLS_GD_BOTH_P(type) \
668 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
669#define GOT_TLS_GD_P(type) \
670 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
671#define GOT_TLS_GDESC_P(type) \
672 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
673#define GOT_TLS_GD_ANY_P(type) \
674 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
bffbf940 675 unsigned char tls_type;
67a4f2b7
AO		 676
677 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
678 starting at the end of the jump table. */
679 bfd_vma tlsdesc_got;
bffbf940
JJ		 680};
681
351f65ca
L		 682#define elf_x86_64_hash_entry(ent) \
683 ((struct elf_x86_64_link_hash_entry *)(ent))
bffbf940 684
351f65ca 685struct elf_x86_64_obj_tdata
bffbf940
JJ		 686{
687 struct elf_obj_tdata root;
688
689 /* tls_type for each local got entry. */
690 char *local_got_tls_type;
67a4f2b7
AO		 691
692 /* GOTPLT entries for TLS descriptors. */
693 bfd_vma *local_tlsdesc_gotent;
70256ad8
AJ		 694};
695
351f65ca
L		 696#define elf_x86_64_tdata(abfd) \
697 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
bffbf940 698
351f65ca
L		 699#define elf_x86_64_local_got_tls_type(abfd) \
700 (elf_x86_64_tdata (abfd)->local_got_tls_type)
bffbf940 701
351f65ca
L		 702#define elf_x86_64_local_tlsdesc_gotent(abfd) \
703 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
bffbf940 704
0ffa91dd
NC		 705#define is_x86_64_elf(bfd) \
706 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
707 && elf_tdata (bfd) != NULL \
4dfe6ac6 708 && elf_object_id (bfd) == X86_64_ELF_DATA)
0ffa91dd
NC		 709
710static bfd_boolean
351f65ca 711elf_x86_64_mkobject (bfd *abfd)
0ffa91dd 712{
351f65ca 713 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
4dfe6ac6 714 X86_64_ELF_DATA);
0ffa91dd
NC		 715}
716
c434dee6 717/* x86-64 ELF linker hash table. */
8d88c4ca 718
351f65ca 719struct elf_x86_64_link_hash_table
407443a3 720{
c434dee6 721 struct elf_link_hash_table elf;
70256ad8 722
c434dee6 723 /* Short-cuts to get to dynamic linker sections. */
c434dee6
AJ		 724 asection *sdynbss;
725 asection *srelbss;
e41b3a13 726 asection *plt_eh_frame;
70256ad8 727
4dfe6ac6
NC		 728 union
729 {
bffbf940
JJ		 730 bfd_signed_vma refcount;
731 bfd_vma offset;
732 } tls_ld_got;
733
67a4f2b7
AO		 734 /* The amount of space used by the jump slots in the GOT. */
735 bfd_vma sgotplt_jump_table_size;
736
87d72d41
AM		 737 /* Small local sym cache. */
738 struct sym_cache sym_cache;
9f03412a 739
351f65ca
L		 740 bfd_vma (*r_info) (bfd_vma, bfd_vma);
741 bfd_vma (*r_sym) (bfd_vma);
248775ba 742 unsigned int pointer_r_type;
351f65ca
L		 743 const char *dynamic_interpreter;
744 int dynamic_interpreter_size;
745
9f03412a
AO		 746 /* _TLS_MODULE_BASE_ symbol. */
747 struct bfd_link_hash_entry *tls_module_base;
c25bc9fc
L		 748
749 /* Used by local STT_GNU_IFUNC symbols. */
750 htab_t loc_hash_table;
4dfe6ac6
NC		 751 void * loc_hash_memory;
752
753 /* The offset into splt of the PLT entry for the TLS descriptor
754 resolver. Special values are 0, if not necessary (or not found
755 to be necessary yet), and -1 if needed but not determined
756 yet. */
757 bfd_vma tlsdesc_plt;
758 /* The offset into sgot of the GOT entry used by the PLT entry
759 above. */
760 bfd_vma tlsdesc_got;
e1f98742
L		 761
762 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
763 bfd_vma next_jump_slot_index;
764 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
765 bfd_vma next_irelative_index;
c434dee6 766};
70256ad8
AJ		 767
768/* Get the x86-64 ELF linker hash table from a link_info structure. */
8d88c4ca 769
351f65ca 770#define elf_x86_64_hash_table(p) \
4dfe6ac6 771 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
351f65ca 772 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
8d88c4ca 773
351f65ca 774#define elf_x86_64_compute_jump_table_size(htab) \
6de2ae4a 775 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
67a4f2b7 776
407443a3 777/* Create an entry in an x86-64 ELF linker hash table. */
70256ad8
AJ		 778
779static struct bfd_hash_entry *
351f65ca
L		 780elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
781 struct bfd_hash_table *table,
782 const char *string)
70256ad8 783{
70256ad8 784 /* Allocate the structure if it has not already been allocated by a
c434dee6
AJ		 785 subclass. */
786 if (entry == NULL)
787 {
a50b1753 788 entry = (struct bfd_hash_entry *)
eed180f8
RM		 789 bfd_hash_allocate (table,
790 sizeof (struct elf_x86_64_link_hash_entry));
c434dee6
AJ		 791 if (entry == NULL)
792 return entry;
793 }
70256ad8
AJ		 794
795 /* Call the allocation method of the superclass. */
c434dee6
AJ		 796 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
797 if (entry != NULL)
70256ad8 798 {
351f65ca 799 struct elf_x86_64_link_hash_entry *eh;
c434dee6 800
351f65ca 801 eh = (struct elf_x86_64_link_hash_entry *) entry;
c434dee6 802 eh->dyn_relocs = NULL;
bffbf940 803 eh->tls_type = GOT_UNKNOWN;
67a4f2b7 804 eh->tlsdesc_got = (bfd_vma) -1;
70256ad8
AJ		 805 }
806
c434dee6 807 return entry;
70256ad8
AJ		 808}
809
c25bc9fc
L		 810/* Compute a hash of a local hash entry. We use elf_link_hash_entry
811 for local symbol so that we can handle local STT_GNU_IFUNC symbols
812 as global symbol. We reuse indx and dynstr_index for local symbol
813 hash since they aren't used by global symbols in this backend. */
814
815static hashval_t
351f65ca 816elf_x86_64_local_htab_hash (const void *ptr)
c25bc9fc
L		 817{
818 struct elf_link_hash_entry *h
819 = (struct elf_link_hash_entry *) ptr;
d2149d72 820 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
c25bc9fc
L		 821}
822
823/* Compare local hash entries. */
824
825static int
351f65ca 826elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
c25bc9fc
L		 827{
828 struct elf_link_hash_entry *h1
829 = (struct elf_link_hash_entry *) ptr1;
830 struct elf_link_hash_entry *h2
831 = (struct elf_link_hash_entry *) ptr2;
832
833 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
834}
835
836/* Find and/or create a hash entry for local symbol. */
837
838static struct elf_link_hash_entry *
351f65ca
L		 839elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
840 bfd *abfd, const Elf_Internal_Rela *rel,
841 bfd_boolean create)
c25bc9fc 842{
351f65ca 843 struct elf_x86_64_link_hash_entry e, *ret;
c25bc9fc 844 asection *sec = abfd->sections;
d2149d72 845 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
351f65ca 846 htab->r_sym (rel->r_info));
c25bc9fc
L		 847 void **slot;
848
849 e.elf.indx = sec->id;
351f65ca 850 e.elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc
L		 851 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
852 create ? INSERT : NO_INSERT);
853
854 if (!slot)
855 return NULL;
856
857 if (*slot)
858 {
351f65ca 859 ret = (struct elf_x86_64_link_hash_entry *) *slot;
c25bc9fc
L		 860 return &ret->elf;
861 }
862
351f65ca 863 ret = (struct elf_x86_64_link_hash_entry *)
c25bc9fc 864 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
351f65ca 865 sizeof (struct elf_x86_64_link_hash_entry));
c25bc9fc
L		 866 if (ret)
867 {
868 memset (ret, 0, sizeof (*ret));
869 ret->elf.indx = sec->id;
351f65ca 870 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
c25bc9fc 871 ret->elf.dynindx = -1;
c25bc9fc
L		 872 *slot = ret;
873 }
874 return &ret->elf;
875}
876
8d88c4ca
NC		 877/* Create an X86-64 ELF linker hash table. */
878
879static struct bfd_link_hash_table *
351f65ca 880elf_x86_64_link_hash_table_create (bfd *abfd)
8d88c4ca 881{
351f65ca
L		 882 struct elf_x86_64_link_hash_table *ret;
883 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
8d88c4ca 884
351f65ca 885 ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt);
c434dee6 886 if (ret == NULL)
8d88c4ca
NC		 887 return NULL;
888
eb4ff4d6 889 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
351f65ca
L		 890 elf_x86_64_link_hash_newfunc,
891 sizeof (struct elf_x86_64_link_hash_entry),
4dfe6ac6 892 X86_64_ELF_DATA))
8d88c4ca 893 {
e2d34d7d 894 free (ret);
8d88c4ca
NC		 895 return NULL;
896 }
897
c434dee6
AJ		 898 ret->sdynbss = NULL;
899 ret->srelbss = NULL;
332ce62b 900 ret->plt_eh_frame = NULL;
87d72d41 901 ret->sym_cache.abfd = NULL;
67a4f2b7
AO		 902 ret->tlsdesc_plt = 0;
903 ret->tlsdesc_got = 0;
bffbf940 904 ret->tls_ld_got.refcount = 0;
67a4f2b7 905 ret->sgotplt_jump_table_size = 0;
9f03412a 906 ret->tls_module_base = NULL;
eed180f8 907 ret->next_jump_slot_index = 0;
e1f98742 908 ret->next_irelative_index = 0;
6bbec505 909
351f65ca
L		 910 if (ABI_64_P (abfd))
911 {
912 ret->r_info = elf64_r_info;
913 ret->r_sym = elf64_r_sym;
248775ba 914 ret->pointer_r_type = R_X86_64_64;
351f65ca
L		 915 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
916 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
917 }
918 else
919 {
920 ret->r_info = elf32_r_info;
921 ret->r_sym = elf32_r_sym;
248775ba 922 ret->pointer_r_type = R_X86_64_32;
351f65ca
L		 923 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
924 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
925 }
926
c25bc9fc 927 ret->loc_hash_table = htab_try_create (1024,
351f65ca
L		 928 elf_x86_64_local_htab_hash,
929 elf_x86_64_local_htab_eq,
c25bc9fc
L		 930 NULL);
931 ret->loc_hash_memory = objalloc_create ();
932 if (!ret->loc_hash_table || !ret->loc_hash_memory)
933 {
934 free (ret);
935 return NULL;
936 }
937
c434dee6
AJ		 938 return &ret->elf.root;
939}
940
c25bc9fc
L		 941/* Destroy an X86-64 ELF linker hash table. */
942
943static void
351f65ca 944elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash)
c25bc9fc 945{
351f65ca
L		 946 struct elf_x86_64_link_hash_table *htab
947 = (struct elf_x86_64_link_hash_table *) hash;
c25bc9fc
L		 948
949 if (htab->loc_hash_table)
950 htab_delete (htab->loc_hash_table);
951 if (htab->loc_hash_memory)
952 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
953 _bfd_generic_link_hash_table_free (hash);
954}
955
c434dee6
AJ		 956/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
957 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
958 hash table. */
959
b34976b6 960static bfd_boolean
351f65ca
L		 961elf_x86_64_create_dynamic_sections (bfd *dynobj,
962 struct bfd_link_info *info)
c434dee6 963{
351f65ca 964 struct elf_x86_64_link_hash_table *htab;
c434dee6 965
c434dee6 966 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 967 return FALSE;
c434dee6 968
351f65ca 969 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 970 if (htab == NULL)
971 return FALSE;
972
3d4d4302 973 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
c434dee6 974 if (!info->shared)
3d4d4302 975 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
c434dee6 976
6de2ae4a 977 if (!htab->sdynbss
c434dee6
AJ		 978 || (!info->shared && !htab->srelbss))
979 abort ();
980
e41b3a13 981 if (!info->no_ld_generated_unwind_info
2fe0fd06 982 && htab->plt_eh_frame == NULL
e4de50d4 983 && htab->elf.splt != NULL)
e41b3a13 984 {
bbf96e4e
L		 985 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
986 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
987 | SEC_LINKER_CREATED);
e41b3a13 988 htab->plt_eh_frame
bbf96e4e 989 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
e41b3a13
JJ		 990 if (htab->plt_eh_frame == NULL
991 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
992 return FALSE;
e41b3a13 993 }
b34976b6 994 return TRUE;
c434dee6
AJ		 995}
996
997/* Copy the extra info we tack onto an elf_link_hash_entry. */
998
999static void
351f65ca
L		 1000elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1001 struct elf_link_hash_entry *dir,
1002 struct elf_link_hash_entry *ind)
c434dee6 1003{
351f65ca 1004 struct elf_x86_64_link_hash_entry *edir, *eind;
c434dee6 1005
351f65ca
L		 1006 edir = (struct elf_x86_64_link_hash_entry *) dir;
1007 eind = (struct elf_x86_64_link_hash_entry *) ind;
c434dee6
AJ		 1008
1009 if (eind->dyn_relocs != NULL)
1010 {
1011 if (edir->dyn_relocs != NULL)
1012 {
e03a8ed8
L		 1013 struct elf_dyn_relocs **pp;
1014 struct elf_dyn_relocs *p;
c434dee6 1015
fcfa13d2 1016 /* Add reloc counts against the indirect sym to the direct sym
c434dee6
AJ		 1017 list. Merge any entries against the same section. */
1018 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1019 {
e03a8ed8 1020 struct elf_dyn_relocs *q;
c434dee6
AJ		 1021
1022 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1023 if (q->sec == p->sec)
1024 {
1025 q->pc_count += p->pc_count;
1026 q->count += p->count;
1027 *pp = p->next;
1028 break;
1029 }
1030 if (q == NULL)
1031 pp = &p->next;
1032 }
1033 *pp = edir->dyn_relocs;
1034 }
1035
1036 edir->dyn_relocs = eind->dyn_relocs;
1037 eind->dyn_relocs = NULL;
1038 }
1039
bffbf940
JJ		 1040 if (ind->root.type == bfd_link_hash_indirect
1041 && dir->got.refcount <= 0)
1042 {
1043 edir->tls_type = eind->tls_type;
1044 eind->tls_type = GOT_UNKNOWN;
1045 }
1046
d40d037c
AJ		 1047 if (ELIMINATE_COPY_RELOCS
1048 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 1049 && dir->dynamic_adjusted)
1050 {
1051 /* If called to transfer flags for a weakdef during processing
1052 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1053 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1054 dir->ref_dynamic |= ind->ref_dynamic;
1055 dir->ref_regular |= ind->ref_regular;
1056 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1057 dir->needs_plt |= ind->needs_plt;
1058 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1059 }
d40d037c 1060 else
fcfa13d2 1061 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
8d88c4ca
NC		 1062}
1063
b34976b6 1064static bfd_boolean
27482721 1065elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940 1066{
8d88c4ca
NC		 1067 /* Set the right machine number for an x86-64 elf64 file. */
1068 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 1069 return TRUE;
8d88c4ca
NC		 1070}
1071
8059fb19
RM		 1072static bfd_boolean
1073elf32_x86_64_elf_object_p (bfd *abfd)
1074{
1075 /* Set the right machine number for an x86-64 elf32 file. */
1076 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1077 return TRUE;
1078}
1079
142411ca
L		 1080/* Return TRUE if the TLS access code sequence support transition
1081 from R_TYPE. */
1082
1083static bfd_boolean
351f65ca
L		 1084elf_x86_64_check_tls_transition (bfd *abfd,
1085 struct bfd_link_info *info,
1086 asection *sec,
1087 bfd_byte *contents,
1088 Elf_Internal_Shdr *symtab_hdr,
1089 struct elf_link_hash_entry **sym_hashes,
1090 unsigned int r_type,
1091 const Elf_Internal_Rela *rel,
1092 const Elf_Internal_Rela *relend)
bffbf940 1093{
142411ca
L		 1094 unsigned int val;
1095 unsigned long r_symndx;
1096 struct elf_link_hash_entry *h;
1097 bfd_vma offset;
351f65ca 1098 struct elf_x86_64_link_hash_table *htab;
142411ca
L		 1099
1100 /* Get the section contents. */
1101 if (contents == NULL)
1102 {
1103 if (elf_section_data (sec)->this_hdr.contents != NULL)
1104 contents = elf_section_data (sec)->this_hdr.contents;
1105 else
1106 {
1107 /* FIXME: How to better handle error condition? */
1108 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1109 return FALSE;
bffbf940 1110
142411ca
L		 1111 /* Cache the section contents for elf_link_input_bfd. */
1112 elf_section_data (sec)->this_hdr.contents = contents;
1113 }
1114 }
1115
351f65ca 1116 htab = elf_x86_64_hash_table (info);
142411ca 1117 offset = rel->r_offset;
bffbf940 1118 switch (r_type)
142411ca
L		 1119 {
1120 case R_X86_64_TLSGD:
1121 case R_X86_64_TLSLD:
1122 if ((rel + 1) >= relend)
1123 return FALSE;
1124
1125 if (r_type == R_X86_64_TLSGD)
1126 {
52bc799a 1127 /* Check transition from GD access model. For 64bit, only
142411ca
L		 1128 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1129 .word 0x6666; rex64; call __tls_get_addr
52bc799a
L		 1130 can transit to different access model. For 32bit, only
1131 leaq foo@tlsgd(%rip), %rdi
1132 .word 0x6666; rex64; call __tls_get_addr
142411ca
L		 1133 can transit to different access model. */
1134
fa289a5f
AM		 1135 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1136 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1137
52bc799a 1138 if ((offset + 12) > sec->size
fa289a5f 1139 || memcmp (contents + offset + 4, call, 4) != 0)
142411ca 1140 return FALSE;
52bc799a
L		 1141
1142 if (ABI_64_P (abfd))
1143 {
52bc799a 1144 if (offset < 4
fa289a5f 1145 || memcmp (contents + offset - 4, leaq, 4) != 0)
52bc799a
L		 1146 return FALSE;
1147 }
1148 else
1149 {
52bc799a 1150 if (offset < 3
fa289a5f 1151 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
52bc799a
L		 1152 return FALSE;
1153 }
142411ca
L		 1154 }
1155 else
1156 {
1157 /* Check transition from LD access model. Only
1158 leaq foo@tlsld(%rip), %rdi;
1159 call __tls_get_addr
1160 can transit to different access model. */
1161
fa289a5f 1162 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
142411ca
L		 1163
1164 if (offset < 3 || (offset + 9) > sec->size)
1165 return FALSE;
1166
fa289a5f
AM		 1167 if (memcmp (contents + offset - 3, lea, 3) != 0
1168 || 0xe8 != *(contents + offset + 4))
142411ca
L		 1169 return FALSE;
1170 }
1171
351f65ca 1172 r_symndx = htab->r_sym (rel[1].r_info);
142411ca
L		 1173 if (r_symndx < symtab_hdr->sh_info)
1174 return FALSE;
1175
1176 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
c4fb387b 1177 /* Use strncmp to check __tls_get_addr since __tls_get_addr
eed180f8 1178 may be versioned. */
142411ca
L		 1179 return (h != NULL
1180 && h->root.root.string != NULL
351f65ca
L		 1181 && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1182 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)
c4fb387b
L		 1183 && (strncmp (h->root.root.string,
1184 "__tls_get_addr", 14) == 0));
142411ca
L		 1185
1186 case R_X86_64_GOTTPOFF:
1187 /* Check transition from IE access model:
4a4c5f25
L		 1188 mov foo@gottpoff(%rip), %reg
1189 add foo@gottpoff(%rip), %reg
142411ca
L		 1190 */
1191
4a4c5f25
L		 1192 /* Check REX prefix first. */
1193 if (offset >= 3 && (offset + 4) <= sec->size)
1194 {
1195 val = bfd_get_8 (abfd, contents + offset - 3);
1196 if (val != 0x48 && val != 0x4c)
1197 {
1198 /* X32 may have 0x44 REX prefix or no REX prefix. */
1199 if (ABI_64_P (abfd))
1200 return FALSE;
1201 }
1202 }
1203 else
1204 {
1205 /* X32 may not have any REX prefix. */
1206 if (ABI_64_P (abfd))
1207 return FALSE;
1208 if (offset < 2 || (offset + 3) > sec->size)
1209 return FALSE;
1210 }
142411ca
L		 1211
1212 val = bfd_get_8 (abfd, contents + offset - 2);
1213 if (val != 0x8b && val != 0x03)
1214 return FALSE;
1215
1216 val = bfd_get_8 (abfd, contents + offset - 1);
1217 return (val & 0xc7) == 5;
1218
1219 case R_X86_64_GOTPC32_TLSDESC:
1220 /* Check transition from GDesc access model:
1221 leaq x@tlsdesc(%rip), %rax
1222
1223 Make sure it's a leaq adding rip to a 32-bit offset
1224 into any register, although it's probably almost always
1225 going to be rax. */
1226
1227 if (offset < 3 || (offset + 4) > sec->size)
1228 return FALSE;
1229
1230 val = bfd_get_8 (abfd, contents + offset - 3);
1231 if ((val & 0xfb) != 0x48)
1232 return FALSE;
1233
1234 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1235 return FALSE;
1236
1237 val = bfd_get_8 (abfd, contents + offset - 1);
1238 return (val & 0xc7) == 0x05;
1239
1240 case R_X86_64_TLSDESC_CALL:
1241 /* Check transition from GDesc access model:
1242 call *x@tlsdesc(%rax)
1243 */
1244 if (offset + 2 <= sec->size)
1245 {
1246 /* Make sure that it's a call *x@tlsdesc(%rax). */
fa289a5f
AM		 1247 static const unsigned char call[] = { 0xff, 0x10 };
1248 return memcmp (contents + offset, call, 2) == 0;
142411ca
L		 1249 }
1250
1251 return FALSE;
1252
1253 default:
1254 abort ();
1255 }
1256}
1257
1258/* Return TRUE if the TLS access transition is OK or no transition
1259 will be performed. Update R_TYPE if there is a transition. */
1260
1261static bfd_boolean
351f65ca
L		 1262elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1263 asection *sec, bfd_byte *contents,
1264 Elf_Internal_Shdr *symtab_hdr,
1265 struct elf_link_hash_entry **sym_hashes,
1266 unsigned int *r_type, int tls_type,
1267 const Elf_Internal_Rela *rel,
1268 const Elf_Internal_Rela *relend,
1269 struct elf_link_hash_entry *h,
1270 unsigned long r_symndx)
142411ca
L		 1271{
1272 unsigned int from_type = *r_type;
1273 unsigned int to_type = from_type;
1274 bfd_boolean check = TRUE;
1275
bb1cb422
L		 1276 /* Skip TLS transition for functions. */
1277 if (h != NULL
1278 && (h->type == STT_FUNC
1279 || h->type == STT_GNU_IFUNC))
1280 return TRUE;
1281
142411ca 1282 switch (from_type)
bffbf940
JJ		 1283 {
1284 case R_X86_64_TLSGD:
67a4f2b7
AO		 1285 case R_X86_64_GOTPC32_TLSDESC:
1286 case R_X86_64_TLSDESC_CALL:
bffbf940 1287 case R_X86_64_GOTTPOFF:
1d85728f 1288 if (info->executable)
142411ca
L		 1289 {
1290 if (h == NULL)
1291 to_type = R_X86_64_TPOFF32;
1292 else
1293 to_type = R_X86_64_GOTTPOFF;
1294 }
1295
351f65ca 1296 /* When we are called from elf_x86_64_relocate_section,
142411ca
L		 1297 CONTENTS isn't NULL and there may be additional transitions
1298 based on TLS_TYPE. */
1299 if (contents != NULL)
1300 {
1301 unsigned int new_to_type = to_type;
1302
1d85728f 1303 if (info->executable
142411ca
L		 1304 && h != NULL
1305 && h->dynindx == -1
1306 && tls_type == GOT_TLS_IE)
1307 new_to_type = R_X86_64_TPOFF32;
1308
1309 if (to_type == R_X86_64_TLSGD
1310 || to_type == R_X86_64_GOTPC32_TLSDESC
1311 || to_type == R_X86_64_TLSDESC_CALL)
1312 {
1313 if (tls_type == GOT_TLS_IE)
1314 new_to_type = R_X86_64_GOTTPOFF;
1315 }
1316
1317 /* We checked the transition before when we were called from
351f65ca 1318 elf_x86_64_check_relocs. We only want to check the new
142411ca
L		 1319 transition which hasn't been checked before. */
1320 check = new_to_type != to_type && from_type == to_type;
1321 to_type = new_to_type;
1322 }
1323
1324 break;
1325
bffbf940 1326 case R_X86_64_TLSLD:
1d85728f 1327 if (info->executable)
142411ca
L		 1328 to_type = R_X86_64_TPOFF32;
1329 break;
1330
1331 default:
1332 return TRUE;
bffbf940
JJ		 1333 }
1334
142411ca
L		 1335 /* Return TRUE if there is no transition. */
1336 if (from_type == to_type)
1337 return TRUE;
1338
1339 /* Check if the transition can be performed. */
1340 if (check
351f65ca
L		 1341 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1342 symtab_hdr, sym_hashes,
1343 from_type, rel, relend))
142411ca 1344 {
2f629d23 1345 reloc_howto_type *from, *to;
4c544807 1346 const char *name;
142411ca 1347
351f65ca
L		 1348 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1349 to = elf_x86_64_rtype_to_howto (abfd, to_type);
142411ca 1350
4c544807
L		 1351 if (h)
1352 name = h->root.root.string;
1353 else
1354 {
351f65ca 1355 struct elf_x86_64_link_hash_table *htab;
4dfe6ac6 1356
351f65ca 1357 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1358 if (htab == NULL)
1359 name = "*unknown*";
1360 else
1361 {
1362 Elf_Internal_Sym *isym;
1363
1364 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1365 abfd, r_symndx);
1366 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1367 }
4c544807
L		 1368 }
1369
142411ca
L		 1370 (*_bfd_error_handler)
1371 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1372 "in section `%A' failed"),
4c544807 1373 abfd, sec, from->name, to->name, name,
142411ca
L		 1374 (unsigned long) rel->r_offset);
1375 bfd_set_error (bfd_error_bad_value);
1376 return FALSE;
1377 }
1378
1379 *r_type = to_type;
1380 return TRUE;
bffbf940
JJ		 1381}
1382
70256ad8 1383/* Look through the relocs for a section during the first phase, and
c434dee6
AJ		 1384 calculate needed space in the global offset table, procedure
1385 linkage table, and dynamic reloc sections. */
70256ad8 1386
b34976b6 1387static bfd_boolean
351f65ca
L		 1388elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1389 asection *sec,
1390 const Elf_Internal_Rela *relocs)
70256ad8 1391{
351f65ca 1392 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 1393 Elf_Internal_Shdr *symtab_hdr;
1394 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ		 1395 const Elf_Internal_Rela *rel;
1396 const Elf_Internal_Rela *rel_end;
70256ad8
AJ		 1397 asection *sreloc;
1398
1049f94e 1399 if (info->relocatable)
b34976b6 1400 return TRUE;
70256ad8 1401
0ffa91dd
NC		 1402 BFD_ASSERT (is_x86_64_elf (abfd));
1403
351f65ca 1404 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1405 if (htab == NULL)
1406 return FALSE;
1407
0ffa91dd 1408 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8 1409 sym_hashes = elf_sym_hashes (abfd);
70256ad8 1410
c434dee6 1411 sreloc = NULL;
cbe950e9 1412
70256ad8
AJ		 1413 rel_end = relocs + sec->reloc_count;
1414 for (rel = relocs; rel < rel_end; rel++)
1415 {
bffbf940 1416 unsigned int r_type;
70256ad8
AJ		 1417 unsigned long r_symndx;
1418 struct elf_link_hash_entry *h;
4c544807
L		 1419 Elf_Internal_Sym *isym;
1420 const char *name;
70256ad8 1421
351f65ca
L		 1422 r_symndx = htab->r_sym (rel->r_info);
1423 r_type = ELF32_R_TYPE (rel->r_info);
c434dee6
AJ		 1424
1425 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1426 {
d003868e
AM		 1427 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1428 abfd, r_symndx);
b34976b6 1429 return FALSE;
c434dee6
AJ		 1430 }
1431
70256ad8 1432 if (r_symndx < symtab_hdr->sh_info)
c25bc9fc
L		 1433 {
1434 /* A local symbol. */
c2e61a4e
L		 1435 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1436 abfd, r_symndx);
1437 if (isym == NULL)
1438 return FALSE;
c25bc9fc
L		 1439
1440 /* Check relocation against local STT_GNU_IFUNC symbol. */
351f65ca 1441 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
c25bc9fc 1442 {
351f65ca
L		 1443 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1444 TRUE);
c25bc9fc 1445 if (h == NULL)
c2e61a4e 1446 return FALSE;
6bbec505 1447
c25bc9fc
L		 1448 /* Fake a STT_GNU_IFUNC symbol. */
1449 h->type = STT_GNU_IFUNC;
1450 h->def_regular = 1;
1451 h->ref_regular = 1;
1452 h->forced_local = 1;
1453 h->root.type = bfd_link_hash_defined;
1454 }
1455 else
1456 h = NULL;
1457 }
70256ad8 1458 else
71cb9464 1459 {
4c544807 1460 isym = NULL;
71cb9464
L		 1461 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1462 while (h->root.type == bfd_link_hash_indirect
1463 || h->root.type == bfd_link_hash_warning)
1464 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c25bc9fc 1465 }
cbe950e9 1466
d1534d16
L		 1467 /* Check invalid x32 relocations. */
1468 if (!ABI_64_P (abfd))
1469 switch (r_type)
1470 {
1471 default:
1472 break;
1473
d1534d16
L		 1474 case R_X86_64_DTPOFF64:
1475 case R_X86_64_TPOFF64:
1476 case R_X86_64_PC64:
1477 case R_X86_64_GOTOFF64:
1478 case R_X86_64_GOT64:
1479 case R_X86_64_GOTPCREL64:
1480 case R_X86_64_GOTPC64:
1481 case R_X86_64_GOTPLT64:
1482 case R_X86_64_PLTOFF64:
1483 {
1484 if (h)
1485 name = h->root.root.string;
1486 else
1487 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1488 NULL);
1489 (*_bfd_error_handler)
1490 (_("%B: relocation %s against symbol `%s' isn't "
1491 "supported in x32 mode"), abfd,
1492 x86_64_elf_howto_table[r_type].name, name);
1493 bfd_set_error (bfd_error_bad_value);
1494 return FALSE;
1495 }
1496 break;
1497 }
1498
c25bc9fc
L		 1499 if (h != NULL)
1500 {
cbe950e9
L		 1501 /* Create the ifunc sections for static executables. If we
1502 never see an indirect function symbol nor we are building
1503 a static executable, those sections will be empty and
1504 won't appear in output. */
1505 switch (r_type)
1506 {
1507 default:
1508 break;
1509
1510 case R_X86_64_32S:
1511 case R_X86_64_32:
1512 case R_X86_64_64:
1513 case R_X86_64_PC32:
1514 case R_X86_64_PC64:
1515 case R_X86_64_PLT32:
1516 case R_X86_64_GOTPCREL:
1517 case R_X86_64_GOTPCREL64:
9d4057ee
AM		 1518 if (htab->elf.dynobj == NULL)
1519 htab->elf.dynobj = abfd;
1520 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
c2e61a4e 1521 return FALSE;
cbe950e9
L		 1522 break;
1523 }
1524
1525 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1526 it here if it is defined in a non-shared object. */
1527 if (h->type == STT_GNU_IFUNC
1528 && h->def_regular)
1529 {
1530 /* It is referenced by a non-shared object. */
1531 h->ref_regular = 1;
7ae26bc1 1532 h->needs_plt = 1;
6bbec505 1533
cbe950e9
L		 1534 /* STT_GNU_IFUNC symbol must go through PLT. */
1535 h->plt.refcount += 1;
1536
1537 /* STT_GNU_IFUNC needs dynamic sections. */
1538 if (htab->elf.dynobj == NULL)
1539 htab->elf.dynobj = abfd;
1540
1541 switch (r_type)
1542 {
048cbda4 1543 default:
4c544807
L		 1544 if (h->root.root.string)
1545 name = h->root.root.string;
1546 else
1547 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1548 NULL);
048cbda4
L		 1549 (*_bfd_error_handler)
1550 (_("%B: relocation %s against STT_GNU_IFUNC "
1551 "symbol `%s' isn't handled by %s"), abfd,
1552 x86_64_elf_howto_table[r_type].name,
4c544807 1553 name, __FUNCTION__);
048cbda4 1554 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1555 return FALSE;
cbe950e9 1556
248775ba
L		 1557 case R_X86_64_32:
1558 if (ABI_64_P (abfd))
1559 goto not_pointer;
710ab287
L		 1560 case R_X86_64_64:
1561 h->non_got_ref = 1;
1562 h->pointer_equality_needed = 1;
1563 if (info->shared)
1564 {
710ab287
L		 1565 /* We must copy these reloc types into the output
1566 file. Create a reloc section in dynobj and
1567 make room for this reloc. */
e03a8ed8
L		 1568 sreloc = _bfd_elf_create_ifunc_dyn_reloc
1569 (abfd, info, sec, sreloc,
351f65ca 1570 &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs);
710ab287 1571 if (sreloc == NULL)
c2e61a4e 1572 return FALSE;
710ab287
L		 1573 }
1574 break;
1575
cbe950e9 1576 case R_X86_64_32S:
cbe950e9
L		 1577 case R_X86_64_PC32:
1578 case R_X86_64_PC64:
248775ba 1579not_pointer:
cbe950e9
L		 1580 h->non_got_ref = 1;
1581 if (r_type != R_X86_64_PC32
1582 && r_type != R_X86_64_PC64)
1583 h->pointer_equality_needed = 1;
1584 break;
1585
1586 case R_X86_64_PLT32:
1587 break;
1588
1589 case R_X86_64_GOTPCREL:
1590 case R_X86_64_GOTPCREL64:
7afd84dc 1591 h->got.refcount += 1;
6de2ae4a
L		 1592 if (htab->elf.sgot == NULL
1593 && !_bfd_elf_create_got_section (htab->elf.dynobj,
1594 info))
c2e61a4e 1595 return FALSE;
cbe950e9
L		 1596 break;
1597 }
1598
1599 continue;
1600 }
71cb9464 1601 }
70256ad8 1602
351f65ca
L		 1603 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1604 symtab_hdr, sym_hashes,
1605 &r_type, GOT_UNKNOWN,
1606 rel, rel_end, h, r_symndx))
c2e61a4e 1607 return FALSE;
142411ca 1608
bffbf940 1609 switch (r_type)
70256ad8 1610 {
bffbf940
JJ		 1611 case R_X86_64_TLSLD:
1612 htab->tls_ld_got.refcount += 1;
1613 goto create_got;
1614
1615 case R_X86_64_TPOFF32:
351f65ca 1616 if (!info->executable && ABI_64_P (abfd))
70256ad8 1617 {
09a24cbf 1618 if (h)
4c544807
L		 1619 name = h->root.root.string;
1620 else
1621 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1622 NULL);
bffbf940 1623 (*_bfd_error_handler)
d003868e
AM		 1624 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1625 abfd,
4c544807 1626 x86_64_elf_howto_table[r_type].name, name);
bffbf940 1627 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1628 return FALSE;
70256ad8 1629 }
bffbf940 1630 break;
c434dee6 1631
bffbf940 1632 case R_X86_64_GOTTPOFF:
1d85728f 1633 if (!info->executable)
bffbf940
JJ		 1634 info->flags |= DF_STATIC_TLS;
1635 /* Fall through */
70256ad8 1636
bffbf940
JJ		 1637 case R_X86_64_GOT32:
1638 case R_X86_64_GOTPCREL:
1639 case R_X86_64_TLSGD:
7b81dfbb
AJ		 1640 case R_X86_64_GOT64:
1641 case R_X86_64_GOTPCREL64:
1642 case R_X86_64_GOTPLT64:
67a4f2b7
AO		 1643 case R_X86_64_GOTPC32_TLSDESC:
1644 case R_X86_64_TLSDESC_CALL:
bffbf940
JJ		 1645 /* This symbol requires a global offset table entry. */
1646 {
1647 int tls_type, old_tls_type;
1648
1649 switch (r_type)
1650 {
1651 default: tls_type = GOT_NORMAL; break;
1652 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1653 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
67a4f2b7
AO		 1654 case R_X86_64_GOTPC32_TLSDESC:
1655 case R_X86_64_TLSDESC_CALL:
1656 tls_type = GOT_TLS_GDESC; break;
bffbf940
JJ		 1657 }
1658
1659 if (h != NULL)
1660 {
7b81dfbb
AJ		 1661 if (r_type == R_X86_64_GOTPLT64)
1662 {
1663 /* This relocation indicates that we also need
1664 a PLT entry, as this is a function. We don't need
1665 a PLT entry for local symbols. */
1666 h->needs_plt = 1;
1667 h->plt.refcount += 1;
1668 }
bffbf940 1669 h->got.refcount += 1;
351f65ca 1670 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
bffbf940
JJ		 1671 }
1672 else
1673 {
1674 bfd_signed_vma *local_got_refcounts;
1675
1676 /* This is a global offset table entry for a local symbol. */
1677 local_got_refcounts = elf_local_got_refcounts (abfd);
1678 if (local_got_refcounts == NULL)
1679 {
1680 bfd_size_type size;
1681
1682 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1683 size *= sizeof (bfd_signed_vma)
1684 + sizeof (bfd_vma) + sizeof (char);
bffbf940
JJ		 1685 local_got_refcounts = ((bfd_signed_vma *)
1686 bfd_zalloc (abfd, size));
1687 if (local_got_refcounts == NULL)
c2e61a4e 1688 return FALSE;
bffbf940 1689 elf_local_got_refcounts (abfd) = local_got_refcounts;
351f65ca 1690 elf_x86_64_local_tlsdesc_gotent (abfd)
67a4f2b7 1691 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
351f65ca 1692 elf_x86_64_local_got_tls_type (abfd)
67a4f2b7 1693 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
bffbf940
JJ		 1694 }
1695 local_got_refcounts[r_symndx] += 1;
1696 old_tls_type
351f65ca 1697 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
bffbf940
JJ		 1698 }
1699
1700 /* If a TLS symbol is accessed using IE at least once,
1701 there is no point to use dynamic model for it. */
1702 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
67a4f2b7
AO		 1703 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1704 || tls_type != GOT_TLS_IE))
bffbf940 1705 {
67a4f2b7 1706 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
bffbf940 1707 tls_type = old_tls_type;
67a4f2b7
AO		 1708 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1709 && GOT_TLS_GD_ANY_P (tls_type))
1710 tls_type |= old_tls_type;
bffbf940
JJ		 1711 else
1712 {
09a24cbf 1713 if (h)
4c544807
L		 1714 name = h->root.root.string;
1715 else
1716 name = bfd_elf_sym_name (abfd, symtab_hdr,
1717 isym, NULL);
bffbf940 1718 (*_bfd_error_handler)
1f7a4e42 1719 (_("%B: '%s' accessed both as normal and thread local symbol"),
4c544807 1720 abfd, name);
c2e61a4e 1721 return FALSE;
bffbf940
JJ		 1722 }
1723 }
1724
1725 if (old_tls_type != tls_type)
1726 {
1727 if (h != NULL)
351f65ca 1728 elf_x86_64_hash_entry (h)->tls_type = tls_type;
bffbf940 1729 else
351f65ca 1730 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
bffbf940
JJ		 1731 }
1732 }
c434dee6
AJ		 1733 /* Fall through */
1734
d6ab8113
JB		 1735 case R_X86_64_GOTOFF64:
1736 case R_X86_64_GOTPC32:
7b81dfbb 1737 case R_X86_64_GOTPC64:
bffbf940 1738 create_got:
6de2ae4a 1739 if (htab->elf.sgot == NULL)
c434dee6
AJ		 1740 {
1741 if (htab->elf.dynobj == NULL)
1742 htab->elf.dynobj = abfd;
6de2ae4a
L		 1743 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1744 info))
c2e61a4e 1745 return FALSE;
c434dee6 1746 }
70256ad8
AJ		 1747 break;
1748
1749 case R_X86_64_PLT32:
1750 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ		 1751 actually build the entry in adjust_dynamic_symbol,
1752 because this might be a case of linking PIC code which is
1753 never referenced by a dynamic object, in which case we
1754 don't need to generate a procedure linkage table entry
1755 after all. */
70256ad8
AJ		 1756
1757 /* If this is a local symbol, we resolve it directly without
407443a3 1758 creating a procedure linkage table entry. */
70256ad8
AJ		 1759 if (h == NULL)
1760 continue;
1761
f5385ebf 1762 h->needs_plt = 1;
51b64d56 1763 h->plt.refcount += 1;
70256ad8
AJ		 1764 break;
1765
7b81dfbb
AJ		 1766 case R_X86_64_PLTOFF64:
1767 /* This tries to form the 'address' of a function relative
1768 to GOT. For global symbols we need a PLT entry. */
1769 if (h != NULL)
1770 {
1771 h->needs_plt = 1;
1772 h->plt.refcount += 1;
1773 }
1774 goto create_got;
1775
248775ba
L		 1776 case R_X86_64_32:
1777 if (!ABI_64_P (abfd))
1778 goto pointer;
cc78d0af
AJ		 1779 case R_X86_64_8:
1780 case R_X86_64_16:
70256ad8 1781 case R_X86_64_32S:
1b71fb54
AJ		 1782 /* Let's help debug shared library creation. These relocs
1783 cannot be used in shared libs. Don't error out for
1784 sections we don't care about, such as debug sections or
1785 non-constant sections. */
1786 if (info->shared
1787 && (sec->flags & SEC_ALLOC) != 0
1788 && (sec->flags & SEC_READONLY) != 0)
1789 {
09a24cbf 1790 if (h)
4c544807
L		 1791 name = h->root.root.string;
1792 else
1793 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1b71fb54 1794 (*_bfd_error_handler)
d003868e 1795 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
4c544807 1796 abfd, x86_64_elf_howto_table[r_type].name, name);
1b71fb54 1797 bfd_set_error (bfd_error_bad_value);
c2e61a4e 1798 return FALSE;
1b71fb54
AJ		 1799 }
1800 /* Fall through. */
1801
c434dee6
AJ		 1802 case R_X86_64_PC8:
1803 case R_X86_64_PC16:
70256ad8 1804 case R_X86_64_PC32:
d6ab8113 1805 case R_X86_64_PC64:
1b71fb54 1806 case R_X86_64_64:
248775ba 1807pointer:
710ab287 1808 if (h != NULL && info->executable)
c434dee6
AJ		 1809 {
1810 /* If this reloc is in a read-only section, we might
1811 need a copy reloc. We can't check reliably at this
1812 stage whether the section is read-only, as input
1813 sections have not yet been mapped to output sections.
1814 Tentatively set the flag for now, and correct in
1815 adjust_dynamic_symbol. */
f5385ebf 1816 h->non_got_ref = 1;
c434dee6
AJ		 1817
1818 /* We may need a .plt entry if the function this reloc
1819 refers to is in a shared lib. */
1820 h->plt.refcount += 1;
d6ab8113 1821 if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64)
f5385ebf 1822 h->pointer_equality_needed = 1;
c434dee6 1823 }
70256ad8
AJ		 1824
1825 /* If we are creating a shared library, and this is a reloc
1826 against a global symbol, or a non PC relative reloc
1827 against a local symbol, then we need to copy the reloc
1828 into the shared library. However, if we are linking with
1829 -Bsymbolic, we do not need to copy a reloc against a
1830 global symbol which is defined in an object we are
407443a3 1831 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ		 1832 this point we have not seen all the input files, so it is
1833 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ		 1834 later (it is never cleared). In case of a weak definition,
1835 DEF_REGULAR may be cleared later by a strong definition in
1836 a shared library. We account for that possibility below by
1837 storing information in the relocs_copied field of the hash
1838 table entry. A similar situation occurs when creating
1839 shared libraries and symbol visibility changes render the
1840 symbol local.
1841
1842 If on the other hand, we are creating an executable, we
1843 may need to keep relocations for symbols satisfied by a
1844 dynamic library if we manage to avoid copy relocs for the
0f88be7a 1845 symbol. */
c434dee6
AJ		 1846 if ((info->shared
1847 && (sec->flags & SEC_ALLOC) != 0
d8045f23 1848 && (! IS_X86_64_PCREL_TYPE (r_type)
c434dee6 1849 || (h != NULL
55255dae 1850 && (! SYMBOLIC_BIND (info, h)
c434dee6 1851 || h->root.type == bfd_link_hash_defweak
f5385ebf 1852 || !h->def_regular))))
d40d037c
AJ		 1853 || (ELIMINATE_COPY_RELOCS
1854 && !info->shared
c434dee6
AJ		 1855 && (sec->flags & SEC_ALLOC) != 0
1856 && h != NULL
1857 && (h->root.type == bfd_link_hash_defweak
0f88be7a 1858 || !h->def_regular)))
70256ad8 1859 {
e03a8ed8
L		 1860 struct elf_dyn_relocs *p;
1861 struct elf_dyn_relocs **head;
c434dee6
AJ		 1862
1863 /* We must copy these reloc types into the output file.
1864 Create a reloc section in dynobj and make room for
1865 this reloc. */
70256ad8
AJ		 1866 if (sreloc == NULL)
1867 {
c434dee6
AJ		 1868 if (htab->elf.dynobj == NULL)
1869 htab->elf.dynobj = abfd;
1870
83bac4b0 1871 sreloc = _bfd_elf_make_dynamic_reloc_section
82e96e07
L		 1872 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
1873 abfd, /*rela?*/ TRUE);
70256ad8 1874
70256ad8 1875 if (sreloc == NULL)
c2e61a4e 1876 return FALSE;
70256ad8
AJ		 1877 }
1878
c434dee6
AJ		 1879 /* If this is a global symbol, we count the number of
1880 relocations we need for this symbol. */
1881 if (h != NULL)
70256ad8 1882 {
351f65ca 1883 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
c434dee6
AJ		 1884 }
1885 else
1886 {
1887 /* Track dynamic relocs needed for local syms too.
1888 We really need local syms available to do this
1889 easily. Oh well. */
c434dee6 1890 asection *s;
87d72d41 1891 void **vpp;
87d72d41
AM		 1892
1893 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1894 abfd, r_symndx);
1895 if (isym == NULL)
1896 return FALSE;
1897
1898 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
c434dee6 1899 if (s == NULL)
87d72d41 1900 s = sec;
70256ad8 1901
e81d3500
DD		 1902 /* Beware of type punned pointers vs strict aliasing
1903 rules. */
1904 vpp = &(elf_section_data (s)->local_dynrel);
e03a8ed8 1905 head = (struct elf_dyn_relocs **)vpp;
c434dee6 1906 }
70256ad8 1907
c434dee6
AJ		 1908 p = *head;
1909 if (p == NULL || p->sec != sec)
1910 {
1911 bfd_size_type amt = sizeof *p;
d8045f23 1912
e03a8ed8 1913 p = ((struct elf_dyn_relocs *)
c434dee6 1914 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 1915 if (p == NULL)
c2e61a4e 1916 return FALSE;
c434dee6
AJ		 1917 p->next = *head;
1918 *head = p;
1919 p->sec = sec;
1920 p->count = 0;
1921 p->pc_count = 0;
70256ad8 1922 }
c434dee6
AJ		 1923
1924 p->count += 1;
d8045f23 1925 if (IS_X86_64_PCREL_TYPE (r_type))
c434dee6 1926 p->pc_count += 1;
70256ad8
AJ		 1927 }
1928 break;
fe4770f4
AJ		 1929
1930 /* This relocation describes the C++ object vtable hierarchy.
1931 Reconstruct it for later use during GC. */
1932 case R_X86_64_GNU_VTINHERIT:
c152c796 1933 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
c2e61a4e 1934 return FALSE;
fe4770f4
AJ		 1935 break;
1936
1937 /* This relocation describes which C++ vtable entries are actually
1938 used. Record for later use during GC. */
1939 case R_X86_64_GNU_VTENTRY:
d17e0c6e
JB		 1940 BFD_ASSERT (h != NULL);
1941 if (h != NULL
1942 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
c2e61a4e 1943 return FALSE;
fe4770f4 1944 break;
c434dee6
AJ		 1945
1946 default:
1947 break;
70256ad8
AJ		 1948 }
1949 }
1950
b34976b6 1951 return TRUE;
70256ad8
AJ		 1952}
1953
1954/* Return the section that should be marked against GC for a given
407443a3 1955 relocation. */
70256ad8
AJ		 1956
1957static asection *
351f65ca
L		 1958elf_x86_64_gc_mark_hook (asection *sec,
1959 struct bfd_link_info *info,
1960 Elf_Internal_Rela *rel,
1961 struct elf_link_hash_entry *h,
1962 Elf_Internal_Sym *sym)
70256ad8
AJ		 1963{
1964 if (h != NULL)
351f65ca 1965 switch (ELF32_R_TYPE (rel->r_info))
07adf181
AM		 1966 {
1967 case R_X86_64_GNU_VTINHERIT:
1968 case R_X86_64_GNU_VTENTRY:
1969 return NULL;
1970 }
1971
1972 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
70256ad8
AJ		 1973}
1974
407443a3 1975/* Update the got entry reference counts for the section being removed. */
70256ad8 1976
b34976b6 1977static bfd_boolean
351f65ca
L		 1978elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
1979 asection *sec,
1980 const Elf_Internal_Rela *relocs)
70256ad8 1981{
351f65ca 1982 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 1983 Elf_Internal_Shdr *symtab_hdr;
1984 struct elf_link_hash_entry **sym_hashes;
1985 bfd_signed_vma *local_got_refcounts;
1986 const Elf_Internal_Rela *rel, *relend;
c434dee6 1987
7dda2462
TG		 1988 if (info->relocatable)
1989 return TRUE;
1990
351f65ca 1991 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 1992 if (htab == NULL)
1993 return FALSE;
1994
c434dee6 1995 elf_section_data (sec)->local_dynrel = NULL;
70256ad8 1996
0ffa91dd 1997 symtab_hdr = &elf_symtab_hdr (abfd);
70256ad8
AJ		 1998 sym_hashes = elf_sym_hashes (abfd);
1999 local_got_refcounts = elf_local_got_refcounts (abfd);
2000
351f65ca 2001 htab = elf_x86_64_hash_table (info);
70256ad8
AJ		 2002 relend = relocs + sec->reloc_count;
2003 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 2004 {
2005 unsigned long r_symndx;
2006 unsigned int r_type;
2007 struct elf_link_hash_entry *h = NULL;
70256ad8 2008
351f65ca 2009 r_symndx = htab->r_sym (rel->r_info);
26e41594
AM		 2010 if (r_symndx >= symtab_hdr->sh_info)
2011 {
26e41594 2012 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 2013 while (h->root.type == bfd_link_hash_indirect
2014 || h->root.type == bfd_link_hash_warning)
2015 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 2016 }
bb1cb422
L		 2017 else
2018 {
2019 /* A local symbol. */
2020 Elf_Internal_Sym *isym;
2021
2022 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2023 abfd, r_symndx);
2024
2025 /* Check relocation against local STT_GNU_IFUNC symbol. */
2026 if (isym != NULL
82e96e07 2027 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
bb1cb422 2028 {
351f65ca 2029 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
bb1cb422
L		 2030 if (h == NULL)
2031 abort ();
2032 }
2033 }
c434dee6 2034
3db2e7dd
L		 2035 if (h)
2036 {
2037 struct elf_x86_64_link_hash_entry *eh;
2038 struct elf_dyn_relocs **pp;
2039 struct elf_dyn_relocs *p;
2040
2041 eh = (struct elf_x86_64_link_hash_entry *) h;
2042
2043 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2044 if (p->sec == sec)
2045 {
2046 /* Everything must go for SEC. */
2047 *pp = p->next;
2048 break;
2049 }
2050 }
2051
351f65ca
L		 2052 r_type = ELF32_R_TYPE (rel->r_info);
2053 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
2054 symtab_hdr, sym_hashes,
2055 &r_type, GOT_UNKNOWN,
2056 rel, relend, h, r_symndx))
142411ca
L		 2057 return FALSE;
2058
26e41594
AM		 2059 switch (r_type)
2060 {
2061 case R_X86_64_TLSLD:
4dfe6ac6
NC		 2062 if (htab->tls_ld_got.refcount > 0)
2063 htab->tls_ld_got.refcount -= 1;
26e41594 2064 break;
c434dee6 2065
26e41594 2066 case R_X86_64_TLSGD:
67a4f2b7
AO		 2067 case R_X86_64_GOTPC32_TLSDESC:
2068 case R_X86_64_TLSDESC_CALL:
26e41594
AM		 2069 case R_X86_64_GOTTPOFF:
2070 case R_X86_64_GOT32:
2071 case R_X86_64_GOTPCREL:
7b81dfbb
AJ		 2072 case R_X86_64_GOT64:
2073 case R_X86_64_GOTPCREL64:
2074 case R_X86_64_GOTPLT64:
26e41594
AM		 2075 if (h != NULL)
2076 {
7b81dfbb 2077 if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0)
eed180f8 2078 h->plt.refcount -= 1;
26e41594
AM		 2079 if (h->got.refcount > 0)
2080 h->got.refcount -= 1;
bb1cb422
L		 2081 if (h->type == STT_GNU_IFUNC)
2082 {
2083 if (h->plt.refcount > 0)
2084 h->plt.refcount -= 1;
2085 }
26e41594
AM		 2086 }
2087 else if (local_got_refcounts != NULL)
2088 {
2089 if (local_got_refcounts[r_symndx] > 0)
2090 local_got_refcounts[r_symndx] -= 1;
2091 }
2092 break;
c434dee6 2093
26e41594
AM		 2094 case R_X86_64_8:
2095 case R_X86_64_16:
2096 case R_X86_64_32:
2097 case R_X86_64_64:
2098 case R_X86_64_32S:
2099 case R_X86_64_PC8:
2100 case R_X86_64_PC16:
2101 case R_X86_64_PC32:
d6ab8113 2102 case R_X86_64_PC64:
3db2e7dd
L		 2103 if (info->shared
2104 && (h == NULL || h->type != STT_GNU_IFUNC))
26e41594
AM		 2105 break;
2106 /* Fall thru */
c434dee6 2107
26e41594 2108 case R_X86_64_PLT32:
7b81dfbb 2109 case R_X86_64_PLTOFF64:
26e41594
AM		 2110 if (h != NULL)
2111 {
2112 if (h->plt.refcount > 0)
2113 h->plt.refcount -= 1;
2114 }
2115 break;
70256ad8 2116
26e41594
AM		 2117 default:
2118 break;
2119 }
2120 }
70256ad8 2121
b34976b6 2122 return TRUE;
70256ad8
AJ		 2123}
2124
2125/* Adjust a symbol defined by a dynamic object and referenced by a
2126 regular object. The current definition is in some section of the
2127 dynamic object, but we're not including those sections. We have to
2128 change the definition to something the rest of the link can
407443a3 2129 understand. */
70256ad8 2130
b34976b6 2131static bfd_boolean
351f65ca
L		 2132elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2133 struct elf_link_hash_entry *h)
70256ad8 2134{
351f65ca 2135 struct elf_x86_64_link_hash_table *htab;
70256ad8 2136 asection *s;
70256ad8 2137
cbe950e9
L		 2138 /* STT_GNU_IFUNC symbol must go through PLT. */
2139 if (h->type == STT_GNU_IFUNC)
2140 {
2141 if (h->plt.refcount <= 0)
2142 {
2143 h->plt.offset = (bfd_vma) -1;
2144 h->needs_plt = 0;
2145 }
2146 return TRUE;
2147 }
2148
70256ad8
AJ		 2149 /* If this is a function, put it in the procedure linkage table. We
2150 will fill in the contents of the procedure linkage table later,
2151 when we know the address of the .got section. */
2152 if (h->type == STT_FUNC
f5385ebf 2153 || h->needs_plt)
70256ad8 2154 {
c434dee6 2155 if (h->plt.refcount <= 0
27482721
AJ		 2156 || SYMBOL_CALLS_LOCAL (info, h)
2157 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2158 && h->root.type == bfd_link_hash_undefweak))
70256ad8 2159 {
70256ad8
AJ		 2160 /* This case can occur if we saw a PLT32 reloc in an input
2161 file, but the symbol was never referred to by a dynamic
2162 object, or if all references were garbage collected. In
2163 such a case, we don't actually need to build a procedure
2164 linkage table, and we can just do a PC32 reloc instead. */
70256ad8 2165 h->plt.offset = (bfd_vma) -1;
f5385ebf 2166 h->needs_plt = 0;
70256ad8
AJ		 2167 }
2168
b34976b6 2169 return TRUE;
70256ad8 2170 }
bbd7ec4a 2171 else
c434dee6
AJ		 2172 /* It's possible that we incorrectly decided a .plt reloc was
2173 needed for an R_X86_64_PC32 reloc to a non-function sym in
2174 check_relocs. We can't decide accurately between function and
2175 non-function syms in check-relocs; Objects loaded later in
2176 the link may change h->type. So fix it now. */
bbd7ec4a 2177 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ		 2178
2179 /* If this is a weak symbol, and there is a real definition, the
2180 processor independent code will have arranged for us to see the
407443a3 2181 real definition first, and we can just use the same value. */
f6e332e6 2182 if (h->u.weakdef != NULL)
70256ad8 2183 {
f6e332e6
AM		 2184 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2185 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2186 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2187 h->root.u.def.value = h->u.weakdef->root.u.def.value;
d40d037c 2188 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 2189 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 2190 return TRUE;
70256ad8
AJ		 2191 }
2192
2193 /* This is a reference to a symbol defined by a dynamic object which
407443a3 2194 is not a function. */
70256ad8
AJ		 2195
2196 /* If we are creating a shared library, we must presume that the
2197 only references to the symbol are via the global offset table.
2198 For such cases we need not do anything here; the relocations will
407443a3 2199 be handled correctly by relocate_section. */
70256ad8 2200 if (info->shared)
b34976b6 2201 return TRUE;
70256ad8
AJ		 2202
2203 /* If there are no references to this symbol that do not use the
2204 GOT, we don't need to generate a copy reloc. */
f5385ebf 2205 if (!h->non_got_ref)
b34976b6 2206 return TRUE;
70256ad8 2207
c434dee6
AJ		 2208 /* If -z nocopyreloc was given, we won't generate them either. */
2209 if (info->nocopyreloc)
2210 {
f5385ebf 2211 h->non_got_ref = 0;
b34976b6 2212 return TRUE;
c434dee6
AJ		 2213 }
2214
d40d037c 2215 if (ELIMINATE_COPY_RELOCS)
c434dee6 2216 {
351f65ca 2217 struct elf_x86_64_link_hash_entry * eh;
e03a8ed8 2218 struct elf_dyn_relocs *p;
c434dee6 2219
351f65ca 2220 eh = (struct elf_x86_64_link_hash_entry *) h;
d40d037c
AJ		 2221 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2222 {
2223 s = p->sec->output_section;
2224 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2225 break;
2226 }
2227
2228 /* If we didn't find any dynamic relocs in read-only sections, then
2229 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2230 if (p == NULL)
2231 {
f5385ebf 2232 h->non_got_ref = 0;
d40d037c
AJ		 2233 return TRUE;
2234 }
c434dee6
AJ		 2235 }
2236
70256ad8 2237 /* We must allocate the symbol in our .dynbss section, which will
407443a3 2238 become part of the .bss section of the executable. There will be
70256ad8
AJ		 2239 an entry for this symbol in the .dynsym section. The dynamic
2240 object will contain position independent code, so all references
2241 from the dynamic object to this symbol will go through the global
2242 offset table. The dynamic linker will use the .dynsym entry to
2243 determine the address it must put in the global offset table, so
2244 both the dynamic object and the regular object will refer to the
2245 same memory location for the variable. */
2246
351f65ca 2247 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2248 if (htab == NULL)
2249 return FALSE;
70256ad8
AJ		 2250
2251 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2252 to copy the initial value out of the dynamic object and into the
cedb70c5 2253 runtime process image. */
1d7e9d18 2254 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
70256ad8 2255 {
351f65ca
L		 2256 const struct elf_backend_data *bed;
2257 bed = get_elf_backend_data (info->output_bfd);
2258 htab->srelbss->size += bed->s->sizeof_rela;
f5385ebf 2259 h->needs_copy = 1;
70256ad8
AJ		 2260 }
2261
c434dee6 2262 s = htab->sdynbss;
70256ad8 2263
027297b7 2264 return _bfd_elf_adjust_dynamic_copy (h, s);
70256ad8
AJ		 2265}
2266
c434dee6
AJ		 2267/* Allocate space in .plt, .got and associated reloc sections for
2268 dynamic relocs. */
2269
b34976b6 2270static bfd_boolean
351f65ca 2271elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 2272{
2273 struct bfd_link_info *info;
351f65ca
L		 2274 struct elf_x86_64_link_hash_table *htab;
2275 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2276 struct elf_dyn_relocs *p;
351f65ca 2277 const struct elf_backend_data *bed;
eed180f8 2278 unsigned int plt_entry_size;
c434dee6 2279
e92d460e 2280 if (h->root.type == bfd_link_hash_indirect)
b34976b6 2281 return TRUE;
c434dee6 2282
351f65ca 2283 eh = (struct elf_x86_64_link_hash_entry *) h;
e92d460e 2284
c434dee6 2285 info = (struct bfd_link_info *) inf;
351f65ca 2286 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2287 if (htab == NULL)
2288 return FALSE;
351f65ca 2289 bed = get_elf_backend_data (info->output_bfd);
eed180f8 2290 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
c434dee6 2291
cbe950e9
L		 2292 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2293 here if it is defined and referenced in a non-shared object. */
2294 if (h->type == STT_GNU_IFUNC
2295 && h->def_regular)
e03a8ed8
L		 2296 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2297 &eh->dyn_relocs,
eed180f8 2298 plt_entry_size,
e03a8ed8 2299 GOT_ENTRY_SIZE);
cbe950e9
L		 2300 else if (htab->elf.dynamic_sections_created
2301 && h->plt.refcount > 0)
c434dee6
AJ		 2302 {
2303 /* Make sure this symbol is output as a dynamic symbol.
2304 Undefined weak syms won't yet be marked as dynamic. */
2305 if (h->dynindx == -1
f5385ebf 2306 && !h->forced_local)
c434dee6 2307 {
c152c796 2308 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2309 return FALSE;
c434dee6
AJ		 2310 }
2311
27482721
AJ		 2312 if (info->shared
2313 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6 2314 {
6de2ae4a 2315 asection *s = htab->elf.splt;
c434dee6
AJ		 2316
2317 /* If this is the first .plt entry, make room for the special
2318 first entry. */
eea6121a 2319 if (s->size == 0)
eed180f8 2320 s->size += plt_entry_size;
c434dee6 2321
eea6121a 2322 h->plt.offset = s->size;
c434dee6
AJ		 2323
2324 /* If this symbol is not defined in a regular file, and we are
2325 not generating a shared library, then set the symbol to this
2326 location in the .plt. This is required to make function
2327 pointers compare as equal between the normal executable and
2328 the shared library. */
2329 if (! info->shared
f5385ebf 2330 && !h->def_regular)
c434dee6
AJ		 2331 {
2332 h->root.u.def.section = s;
2333 h->root.u.def.value = h->plt.offset;
2334 }
2335
2336 /* Make room for this entry. */
eed180f8 2337 s->size += plt_entry_size;
c434dee6
AJ		 2338
2339 /* We also need to make an entry in the .got.plt section, which
2340 will be placed in the .got section by the linker script. */
6de2ae4a 2341 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
c434dee6
AJ		 2342
2343 /* We also need to make an entry in the .rela.plt section. */
351f65ca 2344 htab->elf.srelplt->size += bed->s->sizeof_rela;
6de2ae4a 2345 htab->elf.srelplt->reloc_count++;
c434dee6
AJ		 2346 }
2347 else
2348 {
2349 h->plt.offset = (bfd_vma) -1;
f5385ebf 2350 h->needs_plt = 0;
c434dee6
AJ		 2351 }
2352 }
2353 else
2354 {
2355 h->plt.offset = (bfd_vma) -1;
f5385ebf 2356 h->needs_plt = 0;
c434dee6
AJ		 2357 }
2358
67a4f2b7
AO		 2359 eh->tlsdesc_got = (bfd_vma) -1;
2360
bffbf940
JJ		 2361 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2362 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2363 if (h->got.refcount > 0
1d85728f 2364 && info->executable
bffbf940 2365 && h->dynindx == -1
351f65ca 2366 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
d8045f23
NC		 2367 {
2368 h->got.offset = (bfd_vma) -1;
2369 }
bffbf940 2370 else if (h->got.refcount > 0)
c434dee6
AJ		 2371 {
2372 asection *s;
b34976b6 2373 bfd_boolean dyn;
351f65ca 2374 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ		 2375
2376 /* Make sure this symbol is output as a dynamic symbol.
2377 Undefined weak syms won't yet be marked as dynamic. */
2378 if (h->dynindx == -1
f5385ebf 2379 && !h->forced_local)
c434dee6 2380 {
c152c796 2381 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 2382 return FALSE;
c434dee6
AJ		 2383 }
2384
67a4f2b7
AO		 2385 if (GOT_TLS_GDESC_P (tls_type))
2386 {
6de2ae4a 2387 eh->tlsdesc_got = htab->elf.sgotplt->size
351f65ca 2388 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2389 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 2390 h->got.offset = (bfd_vma) -2;
2391 }
2392 if (! GOT_TLS_GDESC_P (tls_type)
2393 || GOT_TLS_GD_P (tls_type))
2394 {
6de2ae4a 2395 s = htab->elf.sgot;
67a4f2b7
AO		 2396 h->got.offset = s->size;
2397 s->size += GOT_ENTRY_SIZE;
2398 if (GOT_TLS_GD_P (tls_type))
2399 s->size += GOT_ENTRY_SIZE;
2400 }
c434dee6 2401 dyn = htab->elf.dynamic_sections_created;
bffbf940
JJ		 2402 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2403 and two if global.
2404 R_X86_64_GOTTPOFF needs one dynamic relocation. */
67a4f2b7 2405 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
bffbf940 2406 || tls_type == GOT_TLS_IE)
351f65ca 2407 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7 2408 else if (GOT_TLS_GD_P (tls_type))
351f65ca 2409 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
67a4f2b7
AO		 2410 else if (! GOT_TLS_GDESC_P (tls_type)
2411 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2412 || h->root.type != bfd_link_hash_undefweak)
27482721
AJ		 2413 && (info->shared
2414 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
351f65ca 2415 htab->elf.srelgot->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2416 if (GOT_TLS_GDESC_P (tls_type))
2417 {
351f65ca 2418 htab->elf.srelplt->size += bed->s->sizeof_rela;
67a4f2b7
AO		 2419 htab->tlsdesc_plt = (bfd_vma) -1;
2420 }
c434dee6
AJ		 2421 }
2422 else
2423 h->got.offset = (bfd_vma) -1;
2424
c434dee6 2425 if (eh->dyn_relocs == NULL)
b34976b6 2426 return TRUE;
c434dee6
AJ		 2427
2428 /* In the shared -Bsymbolic case, discard space allocated for
2429 dynamic pc-relative relocs against symbols which turn out to be
2430 defined in regular objects. For the normal shared case, discard
2431 space for pc-relative relocs that have become local due to symbol
2432 visibility changes. */
2433
2434 if (info->shared)
2435 {
27482721
AJ		 2436 /* Relocs that use pc_count are those that appear on a call
2437 insn, or certain REL relocs that can generated via assembly.
2438 We want calls to protected symbols to resolve directly to the
2439 function rather than going via the plt. If people want
2440 function pointer comparisons to work as expected then they
2441 should avoid writing weird assembly. */
2442 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6 2443 {
e03a8ed8 2444 struct elf_dyn_relocs **pp;
c434dee6
AJ		 2445
2446 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2447 {
2448 p->count -= p->pc_count;
2449 p->pc_count = 0;
2450 if (p->count == 0)
2451 *pp = p->next;
2452 else
2453 pp = &p->next;
2454 }
2455 }
4e795f50
AM		 2456
2457 /* Also discard relocs on undefined weak syms with non-default
2458 visibility. */
22d606e9 2459 if (eh->dyn_relocs != NULL
4e795f50 2460 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM		 2461 {
2462 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2463 eh->dyn_relocs = NULL;
2464
2465 /* Make sure undefined weak symbols are output as a dynamic
2466 symbol in PIEs. */
2467 else if (h->dynindx == -1
d8045f23
NC		 2468 && ! h->forced_local
2469 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2470 return FALSE;
22d606e9 2471 }
cbe950e9 2472
d8045f23 2473 }
d40d037c 2474 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ		 2475 {
2476 /* For the non-shared case, discard space for relocs against
2477 symbols which turn out to need copy relocs or are not
2478 dynamic. */
2479
f5385ebf
AM		 2480 if (!h->non_got_ref
2481 && ((h->def_dynamic
2482 && !h->def_regular)
c434dee6
AJ		 2483 || (htab->elf.dynamic_sections_created
2484 && (h->root.type == bfd_link_hash_undefweak
2485 || h->root.type == bfd_link_hash_undefined))))
2486 {
2487 /* Make sure this symbol is output as a dynamic symbol.
2488 Undefined weak syms won't yet be marked as dynamic. */
2489 if (h->dynindx == -1
d8045f23
NC		 2490 && ! h->forced_local
2491 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2492 return FALSE;
c434dee6
AJ		 2493
2494 /* If that succeeded, we know we'll be keeping all the
2495 relocs. */
2496 if (h->dynindx != -1)
2497 goto keep;
2498 }
2499
2500 eh->dyn_relocs = NULL;
2501
2502 keep: ;
2503 }
2504
2505 /* Finally, allocate space. */
2506 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2507 {
e7c33416
NC		 2508 asection * sreloc;
2509
cbe950e9 2510 sreloc = elf_section_data (p->sec)->sreloc;
e7c33416
NC		 2511
2512 BFD_ASSERT (sreloc != NULL);
2513
351f65ca 2514 sreloc->size += p->count * bed->s->sizeof_rela;
c434dee6
AJ		 2515 }
2516
b34976b6 2517 return TRUE;
c434dee6
AJ		 2518}
2519
c25bc9fc
L		 2520/* Allocate space in .plt, .got and associated reloc sections for
2521 local dynamic relocs. */
2522
2523static bfd_boolean
351f65ca 2524elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
c25bc9fc
L		 2525{
2526 struct elf_link_hash_entry *h
2527 = (struct elf_link_hash_entry *) *slot;
2528
2529 if (h->type != STT_GNU_IFUNC
2530 || !h->def_regular
2531 || !h->ref_regular
2532 || !h->forced_local
2533 || h->root.type != bfd_link_hash_defined)
2534 abort ();
2535
351f65ca 2536 return elf_x86_64_allocate_dynrelocs (h, inf);
c25bc9fc
L		 2537}
2538
c434dee6
AJ		 2539/* Find any dynamic relocs that apply to read-only sections. */
2540
b34976b6 2541static bfd_boolean
351f65ca
L		 2542elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2543 void * inf)
c434dee6 2544{
351f65ca 2545 struct elf_x86_64_link_hash_entry *eh;
e03a8ed8 2546 struct elf_dyn_relocs *p;
c434dee6 2547
aa715242
L		 2548 /* Skip local IFUNC symbols. */
2549 if (h->forced_local && h->type == STT_GNU_IFUNC)
2550 return TRUE;
2551
351f65ca 2552 eh = (struct elf_x86_64_link_hash_entry *) h;
c434dee6
AJ		 2553 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2554 {
2555 asection *s = p->sec->output_section;
2556
2557 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2558 {
2559 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2560
2561 info->flags |= DF_TEXTREL;
2562
b70321a2
L		 2563 if (info->warn_shared_textrel && info->shared)
2564 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2565 p->sec->owner, h->root.root.string,
2566 p->sec);
2567
c434dee6 2568 /* Not an error, just cut short the traversal. */
b34976b6 2569 return FALSE;
c434dee6
AJ		 2570 }
2571 }
b34976b6 2572 return TRUE;
c434dee6
AJ		 2573}
2574
daa67607
L		 2575/* Convert
2576 mov foo@GOTPCREL(%rip), %reg
2577 to
2578 lea foo(%rip), %reg
2579 with the local symbol, foo. */
2580
2581static bfd_boolean
2582elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec,
2583 struct bfd_link_info *link_info)
2584{
2585 Elf_Internal_Shdr *symtab_hdr;
2586 Elf_Internal_Rela *internal_relocs;
2587 Elf_Internal_Rela *irel, *irelend;
2588 bfd_byte *contents;
2589 struct elf_x86_64_link_hash_table *htab;
2590 bfd_boolean changed_contents;
2591 bfd_boolean changed_relocs;
2592 bfd_signed_vma *local_got_refcounts;
2593
2594 /* Don't even try to convert non-ELF outputs. */
2595 if (!is_elf_hash_table (link_info->hash))
2596 return FALSE;
2597
fbdc86d9 2598 /* Nothing to do if there are no codes, no relocations or no output. */
daa67607 2599 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
fbdc86d9
L		 2600 || sec->reloc_count == 0
2601 || discarded_section (sec))
daa67607
L		 2602 return TRUE;
2603
2604 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2605
2606 /* Load the relocations for this section. */
2607 internal_relocs = (_bfd_elf_link_read_relocs
2608 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2609 link_info->keep_memory));
2610 if (internal_relocs == NULL)
2611 return FALSE;
2612
2613 htab = elf_x86_64_hash_table (link_info);
2614 changed_contents = FALSE;
2615 changed_relocs = FALSE;
2616 local_got_refcounts = elf_local_got_refcounts (abfd);
2617
2618 /* Get the section contents. */
2619 if (elf_section_data (sec)->this_hdr.contents != NULL)
2620 contents = elf_section_data (sec)->this_hdr.contents;
2621 else
2622 {
2623 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2624 goto error_return;
2625 }
2626
2627 irelend = internal_relocs + sec->reloc_count;
2628 for (irel = internal_relocs; irel < irelend; irel++)
2629 {
2630 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2631 unsigned int r_symndx = htab->r_sym (irel->r_info);
2632 unsigned int indx;
2633 struct elf_link_hash_entry *h;
2634
2635 if (r_type != R_X86_64_GOTPCREL)
2636 continue;
2637
2638 /* Get the symbol referred to by the reloc. */
2639 if (r_symndx < symtab_hdr->sh_info)
2640 {
2641 Elf_Internal_Sym *isym;
2642
2643 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2644 abfd, r_symndx);
2645
2646 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2647 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2648 && bfd_get_8 (input_bfd,
2649 contents + irel->r_offset - 2) == 0x8b)
2650 {
2651 bfd_put_8 (output_bfd, 0x8d,
2652 contents + irel->r_offset - 2);
2653 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2654 if (local_got_refcounts != NULL
2655 && local_got_refcounts[r_symndx] > 0)
2656 local_got_refcounts[r_symndx] -= 1;
2657 changed_contents = TRUE;
2658 changed_relocs = TRUE;
2659 }
2660 continue;
2661 }
2662
2663 indx = r_symndx - symtab_hdr->sh_info;
2664 h = elf_sym_hashes (abfd)[indx];
2665 BFD_ASSERT (h != NULL);
2666
2667 while (h->root.type == bfd_link_hash_indirect
2668 || h->root.type == bfd_link_hash_warning)
2669 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2670
3f65f599
L		 2671 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2672 avoid optimizing _DYNAMIC since ld.so may use its link-time
2673 address. */
daa67607
L		 2674 if (h->def_regular
2675 && h->type != STT_GNU_IFUNC
9637f6ef 2676 && h != htab->elf.hdynamic
daa67607
L		 2677 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2678 && bfd_get_8 (input_bfd,
2679 contents + irel->r_offset - 2) == 0x8b)
2680 {
2681 bfd_put_8 (output_bfd, 0x8d,
2682 contents + irel->r_offset - 2);
2683 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2684 if (h->got.refcount > 0)
2685 h->got.refcount -= 1;
2686 changed_contents = TRUE;
2687 changed_relocs = TRUE;
2688 }
2689 }
2690
2691 if (contents != NULL
2692 && elf_section_data (sec)->this_hdr.contents != contents)
2693 {
2694 if (!changed_contents && !link_info->keep_memory)
2695 free (contents);
2696 else
2697 {
2698 /* Cache the section contents for elf_link_input_bfd. */
2699 elf_section_data (sec)->this_hdr.contents = contents;
2700 }
2701 }
2702
2703 if (elf_section_data (sec)->relocs != internal_relocs)
2704 {
2705 if (!changed_relocs)
2706 free (internal_relocs);
2707 else
2708 elf_section_data (sec)->relocs = internal_relocs;
2709 }
2710
2711 return TRUE;
2712
2713 error_return:
2714 if (contents != NULL
2715 && elf_section_data (sec)->this_hdr.contents != contents)
2716 free (contents);
2717 if (internal_relocs != NULL
2718 && elf_section_data (sec)->relocs != internal_relocs)
2719 free (internal_relocs);
2720 return FALSE;
2721}
2722
70256ad8
AJ		 2723/* Set the sizes of the dynamic sections. */
2724
b34976b6 2725static bfd_boolean
351f65ca
L		 2726elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2727 struct bfd_link_info *info)
70256ad8 2728{
351f65ca 2729 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 2730 bfd *dynobj;
2731 asection *s;
b34976b6 2732 bfd_boolean relocs;
c434dee6 2733 bfd *ibfd;
351f65ca 2734 const struct elf_backend_data *bed;
70256ad8 2735
351f65ca 2736 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 2737 if (htab == NULL)
2738 return FALSE;
351f65ca 2739 bed = get_elf_backend_data (output_bfd);
4dfe6ac6 2740
c434dee6
AJ		 2741 dynobj = htab->elf.dynobj;
2742 if (dynobj == NULL)
2743 abort ();
70256ad8 2744
c434dee6 2745 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 2746 {
2747 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 2748 if (info->executable)
70256ad8 2749 {
3d4d4302 2750 s = bfd_get_linker_section (dynobj, ".interp");
c434dee6
AJ		 2751 if (s == NULL)
2752 abort ();
351f65ca
L		 2753 s->size = htab->dynamic_interpreter_size;
2754 s->contents = (unsigned char *) htab->dynamic_interpreter;
70256ad8
AJ		 2755 }
2756 }
70256ad8 2757
c434dee6
AJ		 2758 /* Set up .got offsets for local syms, and space for local dynamic
2759 relocs. */
2760 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
70256ad8 2761 {
c434dee6
AJ		 2762 bfd_signed_vma *local_got;
2763 bfd_signed_vma *end_local_got;
bffbf940 2764 char *local_tls_type;
67a4f2b7 2765 bfd_vma *local_tlsdesc_gotent;
c434dee6
AJ		 2766 bfd_size_type locsymcount;
2767 Elf_Internal_Shdr *symtab_hdr;
2768 asection *srel;
70256ad8 2769
0ffa91dd 2770 if (! is_x86_64_elf (ibfd))
70256ad8
AJ		 2771 continue;
2772
c434dee6 2773 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 2774 {
e03a8ed8 2775 struct elf_dyn_relocs *p;
c434dee6 2776
daa67607
L		 2777 if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info))
2778 return FALSE;
2779
e03a8ed8 2780 for (p = (struct elf_dyn_relocs *)
e81d3500 2781 (elf_section_data (s)->local_dynrel);
c434dee6
AJ		 2782 p != NULL;
2783 p = p->next)
70256ad8 2784 {
c434dee6
AJ		 2785 if (!bfd_is_abs_section (p->sec)
2786 && bfd_is_abs_section (p->sec->output_section))
2787 {
2788 /* Input section has been discarded, either because
2789 it is a copy of a linkonce section or due to
2790 linker script /DISCARD/, so we'll be discarding
2791 the relocs too. */
2792 }
2793 else if (p->count != 0)
2794 {
2795 srel = elf_section_data (p->sec)->sreloc;
351f65ca 2796 srel->size += p->count * bed->s->sizeof_rela;
4b819e1f
L		 2797 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2798 && (info->flags & DF_TEXTREL) == 0)
b70321a2
L		 2799 {
2800 info->flags |= DF_TEXTREL;
2801 if (info->warn_shared_textrel && info->shared)
2802 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2803 p->sec->owner, p->sec);
b70321a2 2804 }
c434dee6 2805 }
70256ad8
AJ		 2806 }
2807 }
c434dee6
AJ		 2808
2809 local_got = elf_local_got_refcounts (ibfd);
2810 if (!local_got)
2811 continue;
2812
0ffa91dd 2813 symtab_hdr = &elf_symtab_hdr (ibfd);
c434dee6
AJ		 2814 locsymcount = symtab_hdr->sh_info;
2815 end_local_got = local_got + locsymcount;
351f65ca
L		 2816 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
2817 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
6de2ae4a
L		 2818 s = htab->elf.sgot;
2819 srel = htab->elf.srelgot;
67a4f2b7
AO		 2820 for (; local_got < end_local_got;
2821 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
70256ad8 2822 {
67a4f2b7 2823 *local_tlsdesc_gotent = (bfd_vma) -1;
c434dee6 2824 if (*local_got > 0)
70256ad8 2825 {
67a4f2b7
AO		 2826 if (GOT_TLS_GDESC_P (*local_tls_type))
2827 {
6de2ae4a 2828 *local_tlsdesc_gotent = htab->elf.sgotplt->size
351f65ca 2829 - elf_x86_64_compute_jump_table_size (htab);
6de2ae4a 2830 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
67a4f2b7
AO		 2831 *local_got = (bfd_vma) -2;
2832 }
2833 if (! GOT_TLS_GDESC_P (*local_tls_type)
2834 || GOT_TLS_GD_P (*local_tls_type))
2835 {
2836 *local_got = s->size;
2837 s->size += GOT_ENTRY_SIZE;
2838 if (GOT_TLS_GD_P (*local_tls_type))
2839 s->size += GOT_ENTRY_SIZE;
2840 }
bffbf940 2841 if (info->shared
67a4f2b7 2842 || GOT_TLS_GD_ANY_P (*local_tls_type)
bffbf940 2843 || *local_tls_type == GOT_TLS_IE)
67a4f2b7
AO		 2844 {
2845 if (GOT_TLS_GDESC_P (*local_tls_type))
2846 {
6de2ae4a 2847 htab->elf.srelplt->size
351f65ca 2848 += bed->s->sizeof_rela;
67a4f2b7
AO		 2849 htab->tlsdesc_plt = (bfd_vma) -1;
2850 }
2851 if (! GOT_TLS_GDESC_P (*local_tls_type)
2852 || GOT_TLS_GD_P (*local_tls_type))
351f65ca 2853 srel->size += bed->s->sizeof_rela;
67a4f2b7 2854 }
70256ad8
AJ		 2855 }
2856 else
c434dee6
AJ		 2857 *local_got = (bfd_vma) -1;
2858 }
2859 }
70256ad8 2860
bffbf940
JJ		 2861 if (htab->tls_ld_got.refcount > 0)
2862 {
2863 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2864 relocs. */
6de2ae4a
L		 2865 htab->tls_ld_got.offset = htab->elf.sgot->size;
2866 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
351f65ca 2867 htab->elf.srelgot->size += bed->s->sizeof_rela;
bffbf940
JJ		 2868 }
2869 else
2870 htab->tls_ld_got.offset = -1;
2871
c434dee6
AJ		 2872 /* Allocate global sym .plt and .got entries, and space for global
2873 sym dynamic relocs. */
351f65ca 2874 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
eb4ff4d6 2875 info);
c434dee6 2876
c25bc9fc
L		 2877 /* Allocate .plt and .got entries, and space for local symbols. */
2878 htab_traverse (htab->loc_hash_table,
351f65ca 2879 elf_x86_64_allocate_local_dynrelocs,
c25bc9fc
L		 2880 info);
2881
67a4f2b7
AO		 2882 /* For every jump slot reserved in the sgotplt, reloc_count is
2883 incremented. However, when we reserve space for TLS descriptors,
2884 it's not incremented, so in order to compute the space reserved
2885 for them, it suffices to multiply the reloc count by the jump
e1f98742
L		 2886 slot size.
2887
2888 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2889 so that R_X86_64_IRELATIVE entries come last. */
6de2ae4a 2890 if (htab->elf.srelplt)
e1f98742
L		 2891 {
2892 htab->sgotplt_jump_table_size
2893 = elf_x86_64_compute_jump_table_size (htab);
2894 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2895 }
2896 else if (htab->elf.irelplt)
2897 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
67a4f2b7
AO		 2898
2899 if (htab->tlsdesc_plt)
2900 {
2901 /* If we're not using lazy TLS relocations, don't generate the
2902 PLT and GOT entries they require. */
2903 if ((info->flags & DF_BIND_NOW))
2904 htab->tlsdesc_plt = 0;
2905 else
2906 {
6de2ae4a
L		 2907 htab->tlsdesc_got = htab->elf.sgot->size;
2908 htab->elf.sgot->size += GOT_ENTRY_SIZE;
67a4f2b7
AO		 2909 /* Reserve room for the initial entry.
2910 FIXME: we could probably do away with it in this case. */
6de2ae4a 2911 if (htab->elf.splt->size == 0)
eed180f8 2912 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
6de2ae4a 2913 htab->tlsdesc_plt = htab->elf.splt->size;
eed180f8 2914 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
67a4f2b7
AO		 2915 }
2916 }
2917
a7b16ceb
L		 2918 if (htab->elf.sgotplt)
2919 {
e28df02b
L		 2920 struct elf_link_hash_entry *got;
2921 got = elf_link_hash_lookup (elf_hash_table (info),
2922 "_GLOBAL_OFFSET_TABLE_",
2923 FALSE, FALSE, FALSE);
2924
a7b16ceb 2925 /* Don't allocate .got.plt section if there are no GOT nor PLT
eed180f8 2926 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
e28df02b
L		 2927 if ((got == NULL
2928 || !got->ref_regular_nonweak)
2929 && (htab->elf.sgotplt->size
2930 == get_elf_backend_data (output_bfd)->got_header_size)
a7b16ceb
L		 2931 && (htab->elf.splt == NULL
2932 || htab->elf.splt->size == 0)
2933 && (htab->elf.sgot == NULL
2934 || htab->elf.sgot->size == 0)
2935 && (htab->elf.iplt == NULL
2936 || htab->elf.iplt->size == 0)
2937 && (htab->elf.igotplt == NULL
2938 || htab->elf.igotplt->size == 0))
2939 htab->elf.sgotplt->size = 0;
2940 }
2941
9a2a56cc
AM		 2942 if (htab->plt_eh_frame != NULL
2943 && htab->elf.splt != NULL
2944 && htab->elf.splt->size != 0
2945 && !bfd_is_abs_section (htab->elf.splt->output_section)
2946 && _bfd_elf_eh_frame_present (info))
2947 {
2948 const struct elf_x86_64_backend_data *arch_data
2949 = (const struct elf_x86_64_backend_data *) bed->arch_data;
2950 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
2951 }
2952
c434dee6
AJ		 2953 /* We now have determined the sizes of the various dynamic sections.
2954 Allocate memory for them. */
b34976b6 2955 relocs = FALSE;
c434dee6
AJ		 2956 for (s = dynobj->sections; s != NULL; s = s->next)
2957 {
2958 if ((s->flags & SEC_LINKER_CREATED) == 0)
2959 continue;
2960
6de2ae4a
L		 2961 if (s == htab->elf.splt
2962 || s == htab->elf.sgot
2963 || s == htab->elf.sgotplt
2964 || s == htab->elf.iplt
2965 || s == htab->elf.igotplt
9a2a56cc 2966 || s == htab->plt_eh_frame
75ff4589 2967 || s == htab->sdynbss)
c434dee6
AJ		 2968 {
2969 /* Strip this section if we don't need it; see the
2970 comment below. */
2971 }
0112cd26 2972 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
c434dee6 2973 {
6de2ae4a 2974 if (s->size != 0 && s != htab->elf.srelplt)
b34976b6 2975 relocs = TRUE;
c434dee6
AJ		 2976
2977 /* We use the reloc_count field as a counter if we need
2978 to copy relocs into the output file. */
6de2ae4a 2979 if (s != htab->elf.srelplt)
67a4f2b7 2980 s->reloc_count = 0;
70256ad8 2981 }
c434dee6 2982 else
70256ad8
AJ		 2983 {
2984 /* It's not one of our sections, so don't allocate space. */
2985 continue;
2986 }
2987
eea6121a 2988 if (s->size == 0)
70256ad8 2989 {
c434dee6
AJ		 2990 /* If we don't need this section, strip it from the
2991 output file. This is mostly to handle .rela.bss and
2992 .rela.plt. We must create both sections in
2993 create_dynamic_sections, because they must be created
2994 before the linker maps input sections to output
2995 sections. The linker does that before
2996 adjust_dynamic_symbol is called, and it is that
2997 function which decides whether anything needs to go
2998 into these sections. */
2999
8423293d 3000 s->flags |= SEC_EXCLUDE;
70256ad8
AJ		 3001 continue;
3002 }
3003
c456f082
AM		 3004 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3005 continue;
3006
70256ad8
AJ		 3007 /* Allocate memory for the section contents. We use bfd_zalloc
3008 here in case unused entries are not reclaimed before the
3009 section's contents are written out. This should not happen,
3010 but this way if it does, we get a R_X86_64_NONE reloc instead
3011 of garbage. */
eea6121a 3012 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
c434dee6 3013 if (s->contents == NULL)
b34976b6 3014 return FALSE;
70256ad8
AJ		 3015 }
3016
e41b3a13 3017 if (htab->plt_eh_frame != NULL
9a2a56cc
AM		 3018 && htab->plt_eh_frame->contents != NULL)
3019 {
3020 const struct elf_x86_64_backend_data *arch_data
3021 = (const struct elf_x86_64_backend_data *) bed->arch_data;
3022
3023 memcpy (htab->plt_eh_frame->contents,
3024 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3025 bfd_put_32 (dynobj, htab->elf.splt->size,
3026 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3027 }
e41b3a13 3028
c434dee6 3029 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 3030 {
3031 /* Add some entries to the .dynamic section. We fill in the
351f65ca 3032 values later, in elf_x86_64_finish_dynamic_sections, but we
70256ad8 3033 must add the entries now so that we get the correct size for
407443a3 3034 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 3035 dynamic linker and used by the debugger. */
dc810e39 3036#define add_dynamic_entry(TAG, VAL) \
5a580b3a 3037 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 3038
36af4a4e 3039 if (info->executable)
70256ad8 3040 {
dc810e39 3041 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 3042 return FALSE;
70256ad8
AJ		 3043 }
3044
6de2ae4a 3045 if (htab->elf.splt->size != 0)
70256ad8 3046 {
dc810e39
AM		 3047 if (!add_dynamic_entry (DT_PLTGOT, 0)
3048 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3049 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3050 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 3051 return FALSE;
67a4f2b7
AO		 3052
3053 if (htab->tlsdesc_plt
3054 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3055 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3056 return FALSE;
70256ad8
AJ		 3057 }
3058
3059 if (relocs)
3060 {
dc810e39
AM		 3061 if (!add_dynamic_entry (DT_RELA, 0)
3062 || !add_dynamic_entry (DT_RELASZ, 0)
351f65ca 3063 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
b34976b6 3064 return FALSE;
70256ad8 3065
c434dee6
AJ		 3066 /* If any dynamic relocs apply to a read-only section,
3067 then we need a DT_TEXTREL entry. */
3068 if ((info->flags & DF_TEXTREL) == 0)
eed180f8 3069 elf_link_hash_traverse (&htab->elf,
351f65ca 3070 elf_x86_64_readonly_dynrelocs,
eb4ff4d6 3071 info);
c434dee6
AJ		 3072
3073 if ((info->flags & DF_TEXTREL) != 0)
3074 {
3075 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 3076 return FALSE;
c434dee6 3077 }
70256ad8
AJ		 3078 }
3079 }
dc810e39 3080#undef add_dynamic_entry
70256ad8 3081
b34976b6 3082 return TRUE;
70256ad8
AJ		 3083}
3084
67a4f2b7 3085static bfd_boolean
351f65ca
L		 3086elf_x86_64_always_size_sections (bfd *output_bfd,
3087 struct bfd_link_info *info)
67a4f2b7
AO		 3088{
3089 asection *tls_sec = elf_hash_table (info)->tls_sec;
3090
3091 if (tls_sec)
3092 {
3093 struct elf_link_hash_entry *tlsbase;
3094
3095 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3096 "_TLS_MODULE_BASE_",
3097 FALSE, FALSE, FALSE);
3098
3099 if (tlsbase && tlsbase->type == STT_TLS)
3100 {
351f65ca 3101 struct elf_x86_64_link_hash_table *htab;
67a4f2b7
AO		 3102 struct bfd_link_hash_entry *bh = NULL;
3103 const struct elf_backend_data *bed
3104 = get_elf_backend_data (output_bfd);
3105
351f65ca 3106 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3107 if (htab == NULL)
3108 return FALSE;
3109
67a4f2b7
AO		 3110 if (!(_bfd_generic_link_add_one_symbol
3111 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3112 tls_sec, 0, NULL, FALSE,
3113 bed->collect, &bh)))
3114 return FALSE;
9f03412a 3115
4dfe6ac6 3116 htab->tls_module_base = bh;
9f03412a 3117
67a4f2b7
AO		 3118 tlsbase = (struct elf_link_hash_entry *)bh;
3119 tlsbase->def_regular = 1;
3120 tlsbase->other = STV_HIDDEN;
3121 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3122 }
3123 }
3124
3125 return TRUE;
3126}
3127
9f03412a
AO		 3128/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3129 executables. Rather than setting it to the beginning of the TLS
3130 section, we have to set it to the end. This function may be called
3131 multiple times, it is idempotent. */
3132
3133static void
351f65ca 3134elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
9f03412a 3135{
351f65ca 3136 struct elf_x86_64_link_hash_table *htab;
9f03412a
AO		 3137 struct bfd_link_hash_entry *base;
3138
3139 if (!info->executable)
3140 return;
3141
351f65ca 3142 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3143 if (htab == NULL)
3144 return;
9f03412a 3145
4dfe6ac6
NC		 3146 base = htab->tls_module_base;
3147 if (base == NULL)
9f03412a
AO		 3148 return;
3149
4dfe6ac6 3150 base->u.def.value = htab->elf.tls_size;
9f03412a
AO		 3151}
3152
bffbf940
JJ		 3153/* Return the base VMA address which should be subtracted from real addresses
3154 when resolving @dtpoff relocation.
3155 This is PT_TLS segment p_vaddr. */
3156
3157static bfd_vma
351f65ca 3158elf_x86_64_dtpoff_base (struct bfd_link_info *info)
bffbf940 3159{
e1918d23
AM		 3160 /* If tls_sec is NULL, we should have signalled an error already. */
3161 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 3162 return 0;
e1918d23 3163 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ		 3164}
3165
3166/* Return the relocation value for @tpoff relocation
3167 if STT_TLS virtual address is ADDRESS. */
3168
3169static bfd_vma
351f65ca 3170elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 3171{
e1918d23 3172 struct elf_link_hash_table *htab = elf_hash_table (info);
7dc98aea
RO		 3173 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3174 bfd_vma static_tls_size;
bffbf940
JJ		 3175
3176 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 3177 if (htab->tls_sec == NULL)
bffbf940 3178 return 0;
7dc98aea
RO		 3179
3180 /* Consider special static TLS alignment requirements. */
3181 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3182 return address - static_tls_size - htab->tls_sec->vma;
bffbf940
JJ		 3183}
3184
90f487df
L		 3185/* Is the instruction before OFFSET in CONTENTS a 32bit relative
3186 branch? */
3187
3188static bfd_boolean
3189is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3190{
3191 /* Opcode Instruction
3192 0xe8 call
3193 0xe9 jump
3194 0x0f 0x8x conditional jump */
3195 return ((offset > 0
3196 && (contents [offset - 1] == 0xe8
3197 || contents [offset - 1] == 0xe9))
3198 || (offset > 1
3199 && contents [offset - 2] == 0x0f
3200 && (contents [offset - 1] & 0xf0) == 0x80));
3201}
3202
8d88c4ca
NC		 3203/* Relocate an x86_64 ELF section. */
3204
b34976b6 3205static bfd_boolean
351f65ca
L		 3206elf_x86_64_relocate_section (bfd *output_bfd,
3207 struct bfd_link_info *info,
3208 bfd *input_bfd,
3209 asection *input_section,
3210 bfd_byte *contents,
3211 Elf_Internal_Rela *relocs,
3212 Elf_Internal_Sym *local_syms,
3213 asection **local_sections)
8d88c4ca 3214{
351f65ca 3215 struct elf_x86_64_link_hash_table *htab;
8d88c4ca
NC		 3216 Elf_Internal_Shdr *symtab_hdr;
3217 struct elf_link_hash_entry **sym_hashes;
3218 bfd_vma *local_got_offsets;
67a4f2b7 3219 bfd_vma *local_tlsdesc_gotents;
c434dee6 3220 Elf_Internal_Rela *rel;
8d88c4ca 3221 Elf_Internal_Rela *relend;
eed180f8 3222 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
8d88c4ca 3223
0ffa91dd
NC		 3224 BFD_ASSERT (is_x86_64_elf (input_bfd));
3225
351f65ca 3226 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 3227 if (htab == NULL)
3228 return FALSE;
0ffa91dd 3229 symtab_hdr = &elf_symtab_hdr (input_bfd);
8d88c4ca
NC		 3230 sym_hashes = elf_sym_hashes (input_bfd);
3231 local_got_offsets = elf_local_got_offsets (input_bfd);
351f65ca 3232 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
8d88c4ca 3233
351f65ca 3234 elf_x86_64_set_tls_module_base (info);
9f03412a 3235
c434dee6 3236 rel = relocs;
8d88c4ca 3237 relend = relocs + input_section->reloc_count;
c434dee6 3238 for (; rel < relend; rel++)
8d88c4ca 3239 {
bffbf940 3240 unsigned int r_type;
8d88c4ca
NC		 3241 reloc_howto_type *howto;
3242 unsigned long r_symndx;
3243 struct elf_link_hash_entry *h;
3244 Elf_Internal_Sym *sym;
3245 asection *sec;
67a4f2b7 3246 bfd_vma off, offplt;
8d88c4ca 3247 bfd_vma relocation;
b34976b6 3248 bfd_boolean unresolved_reloc;
8d88c4ca 3249 bfd_reloc_status_type r;
bffbf940 3250 int tls_type;
cbe950e9 3251 asection *base_got;
8d88c4ca 3252
351f65ca 3253 r_type = ELF32_R_TYPE (rel->r_info);
fe4770f4
AJ		 3254 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3255 || r_type == (int) R_X86_64_GNU_VTENTRY)
3256 continue;
8d88c4ca 3257
bffbf940 3258 if (r_type >= R_X86_64_max)
8da6118f
KH		 3259 {
3260 bfd_set_error (bfd_error_bad_value);
b34976b6 3261 return FALSE;
8da6118f 3262 }
8d88c4ca 3263
d7921315 3264 if (r_type != (int) R_X86_64_32
eed180f8 3265 || ABI_64_P (output_bfd))
d7921315
L		 3266 howto = x86_64_elf_howto_table + r_type;
3267 else
3268 howto = (x86_64_elf_howto_table
3269 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
351f65ca 3270 r_symndx = htab->r_sym (rel->r_info);
8d88c4ca
NC		 3271 h = NULL;
3272 sym = NULL;
3273 sec = NULL;
b34976b6 3274 unresolved_reloc = FALSE;
8d88c4ca 3275 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH		 3276 {
3277 sym = local_syms + r_symndx;
3278 sec = local_sections[r_symndx];
c434dee6 3279
c25bc9fc
L		 3280 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3281 &sec, rel);
3282
3283 /* Relocate against local STT_GNU_IFUNC symbol. */
1f85278f 3284 if (!info->relocatable
351f65ca 3285 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
c25bc9fc 3286 {
351f65ca
L		 3287 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3288 rel, FALSE);
c25bc9fc
L		 3289 if (h == NULL)
3290 abort ();
3291
eed180f8 3292 /* Set STT_GNU_IFUNC symbol value. */
c25bc9fc
L		 3293 h->root.u.def.value = sym->st_value;
3294 h->root.u.def.section = sec;
3295 }
8da6118f 3296 }
8d88c4ca 3297 else
8da6118f 3298 {
c9736ba0 3299 bfd_boolean warned ATTRIBUTE_UNUSED;
c434dee6 3300
b2a8e766
AM		 3301 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3302 r_symndx, symtab_hdr, sym_hashes,
3303 h, sec, relocation,
3304 unresolved_reloc, warned);
8da6118f 3305 }
ab96bf03 3306
dbaa2011 3307 if (sec != NULL && discarded_section (sec))
0672748a 3308 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 3309 rel, 1, relend, howto, 0, contents);
ab96bf03
AM		 3310
3311 if (info->relocatable)
3312 continue;
3313
64d25c44
L		 3314 if (rel->r_addend == 0
3315 && r_type == R_X86_64_64
3316 && !ABI_64_P (output_bfd))
3317 {
3318 /* For x32, treat R_X86_64_64 like R_X86_64_32 and zero-extend
3319 it to 64bit if addend is zero. */
3320 r_type = R_X86_64_32;
3321 memset (contents + rel->r_offset + 4, 0, 4);
3322 }
3323
cbe950e9
L		 3324 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3325 it here if it is defined in a non-shared object. */
3326 if (h != NULL
3327 && h->type == STT_GNU_IFUNC
3328 && h->def_regular)
3329 {
3330 asection *plt;
3331 bfd_vma plt_index;
4c544807 3332 const char *name;
cbe950e9
L		 3333
3334 if ((input_section->flags & SEC_ALLOC) == 0
3335 || h->plt.offset == (bfd_vma) -1)
3336 abort ();
3337
3338 /* STT_GNU_IFUNC symbol must go through PLT. */
6de2ae4a 3339 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
cbe950e9
L		 3340 relocation = (plt->output_section->vma
3341 + plt->output_offset + h->plt.offset);
3342
3343 switch (r_type)
3344 {
3345 default:
4c544807
L		 3346 if (h->root.root.string)
3347 name = h->root.root.string;
3348 else
3349 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3350 NULL);
cbe950e9
L		 3351 (*_bfd_error_handler)
3352 (_("%B: relocation %s against STT_GNU_IFUNC "
3353 "symbol `%s' isn't handled by %s"), input_bfd,
3354 x86_64_elf_howto_table[r_type].name,
4c544807 3355 name, __FUNCTION__);
cbe950e9
L		 3356 bfd_set_error (bfd_error_bad_value);
3357 return FALSE;
3358
3359 case R_X86_64_32S:
710ab287 3360 if (info->shared)
cbe950e9 3361 abort ();
710ab287
L		 3362 goto do_relocation;
3363
248775ba
L		 3364 case R_X86_64_32:
3365 if (ABI_64_P (output_bfd))
3366 goto do_relocation;
17672001 3367 /* FALLTHROUGH */
eed180f8 3368 case R_X86_64_64:
710ab287
L		 3369 if (rel->r_addend != 0)
3370 {
4c544807
L		 3371 if (h->root.root.string)
3372 name = h->root.root.string;
3373 else
3374 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3375 sym, NULL);
710ab287
L		 3376 (*_bfd_error_handler)
3377 (_("%B: relocation %s against STT_GNU_IFUNC "
3378 "symbol `%s' has non-zero addend: %d"),
3379 input_bfd, x86_64_elf_howto_table[r_type].name,
4c544807 3380 name, rel->r_addend);
710ab287
L		 3381 bfd_set_error (bfd_error_bad_value);
3382 return FALSE;
3383 }
3384
3385 /* Generate dynamic relcoation only when there is a
c293fa49 3386 non-GOT reference in a shared object. */
710ab287
L		 3387 if (info->shared && h->non_got_ref)
3388 {
3389 Elf_Internal_Rela outrel;
710ab287
L		 3390 asection *sreloc;
3391
c25bc9fc
L		 3392 /* Need a dynamic relocation to get the real function
3393 address. */
710ab287
L		 3394 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3395 info,
3396 input_section,
3397 rel->r_offset);
3398 if (outrel.r_offset == (bfd_vma) -1
3399 || outrel.r_offset == (bfd_vma) -2)
3400 abort ();
3401
3402 outrel.r_offset += (input_section->output_section->vma
3403 + input_section->output_offset);
3404
3405 if (h->dynindx == -1
44c4ea11
L		 3406 || h->forced_local
3407 || info->executable)
710ab287
L		 3408 {
3409 /* This symbol is resolved locally. */
56b8aada
L		 3410 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3411 outrel.r_addend = (h->root.u.def.value
3412 + h->root.u.def.section->output_section->vma
3413 + h->root.u.def.section->output_offset);
710ab287
L		 3414 }
3415 else
3416 {
351f65ca 3417 outrel.r_info = htab->r_info (h->dynindx, r_type);
710ab287
L		 3418 outrel.r_addend = 0;
3419 }
3420
6de2ae4a 3421 sreloc = htab->elf.irelifunc;
351f65ca 3422 elf_append_rela (output_bfd, sreloc, &outrel);
710ab287
L		 3423
3424 /* If this reloc is against an external symbol, we
3425 do not want to fiddle with the addend. Otherwise,
3426 we need to include the symbol value so that it
3427 becomes an addend for the dynamic reloc. For an
3428 internal symbol, we have updated addend. */
56b8aada 3429 continue;
710ab287 3430 }
17672001 3431 /* FALLTHROUGH */
cbe950e9
L		 3432 case R_X86_64_PC32:
3433 case R_X86_64_PC64:
3434 case R_X86_64_PLT32:
3435 goto do_relocation;
3436
3437 case R_X86_64_GOTPCREL:
3438 case R_X86_64_GOTPCREL64:
6de2ae4a 3439 base_got = htab->elf.sgot;
cbe950e9
L		 3440 off = h->got.offset;
3441
7afd84dc 3442 if (base_got == NULL)
cbe950e9
L		 3443 abort ();
3444
7afd84dc 3445 if (off == (bfd_vma) -1)
cbe950e9 3446 {
7afd84dc
L		 3447 /* We can't use h->got.offset here to save state, or
3448 even just remember the offset, as finish_dynamic_symbol
3449 would use that as offset into .got. */
cbe950e9 3450
6de2ae4a 3451 if (htab->elf.splt != NULL)
7afd84dc 3452 {
eed180f8 3453 plt_index = h->plt.offset / plt_entry_size - 1;
7afd84dc 3454 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3455 base_got = htab->elf.sgotplt;
7afd84dc 3456 }
cbe950e9
L		 3457 else
3458 {
eed180f8 3459 plt_index = h->plt.offset / plt_entry_size;
7afd84dc 3460 off = plt_index * GOT_ENTRY_SIZE;
6de2ae4a 3461 base_got = htab->elf.igotplt;
7afd84dc
L		 3462 }
3463
3464 if (h->dynindx == -1
3465 || h->forced_local
3466 || info->symbolic)
3467 {
eed180f8 3468 /* This references the local defitionion. We must
7afd84dc 3469 initialize this entry in the global offset table.
eed180f8 3470 Since the offset must always be a multiple of 8,
7afd84dc
L		 3471 we use the least significant bit to record
3472 whether we have initialized it already.
3473
3474 When doing a dynamic link, we create a .rela.got
3475 relocation entry to initialize the value. This
3476 is done in the finish_dynamic_symbol routine. */
3477 if ((off & 1) != 0)
3478 off &= ~1;
3479 else
3480 {
3481 bfd_put_64 (output_bfd, relocation,
3482 base_got->contents + off);
3483 /* Note that this is harmless for the GOTPLT64
3484 case, as -1 | 1 still is -1. */
3485 h->got.offset |= 1;
3486 }
cbe950e9
L		 3487 }
3488 }
3489
3490 relocation = (base_got->output_section->vma
3491 + base_got->output_offset + off);
3492
cbe950e9
L		 3493 goto do_relocation;
3494 }
3495 }
3496
70256ad8
AJ		 3497 /* When generating a shared object, the relocations handled here are
3498 copied into the output file to be resolved at run time. */
3499 switch (r_type)
3500 {
3501 case R_X86_64_GOT32:
7b81dfbb 3502 case R_X86_64_GOT64:
70256ad8
AJ		 3503 /* Relocation is to the entry for this symbol in the global
3504 offset table. */
70256ad8 3505 case R_X86_64_GOTPCREL:
7b81dfbb
AJ		 3506 case R_X86_64_GOTPCREL64:
3507 /* Use global offset table entry as symbol value. */
3508 case R_X86_64_GOTPLT64:
3509 /* This is the same as GOT64 for relocation purposes, but
3510 indicates the existence of a PLT entry. The difficulty is,
3511 that we must calculate the GOT slot offset from the PLT
3512 offset, if this symbol got a PLT entry (it was global).
3513 Additionally if it's computed from the PLT entry, then that
3514 GOT offset is relative to .got.plt, not to .got. */
6de2ae4a 3515 base_got = htab->elf.sgot;
7b81dfbb 3516
6de2ae4a 3517 if (htab->elf.sgot == NULL)
c434dee6 3518 abort ();
053579d7 3519
51e0a107 3520 if (h != NULL)
70256ad8 3521 {
b34976b6 3522 bfd_boolean dyn;
c434dee6
AJ		 3523
3524 off = h->got.offset;
7b81dfbb 3525 if (h->needs_plt
eed180f8 3526 && h->plt.offset != (bfd_vma)-1
7b81dfbb
AJ		 3527 && off == (bfd_vma)-1)
3528 {
3529 /* We can't use h->got.offset here to save
3530 state, or even just remember the offset, as
3531 finish_dynamic_symbol would use that as offset into
3532 .got. */
eed180f8 3533 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
7b81dfbb 3534 off = (plt_index + 3) * GOT_ENTRY_SIZE;
6de2ae4a 3535 base_got = htab->elf.sgotplt;
7b81dfbb
AJ		 3536 }
3537
c434dee6 3538 dyn = htab->elf.dynamic_sections_created;
51e0a107 3539
27482721 3540 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
51e0a107 3541 || (info->shared
27482721 3542 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ		 3543 || (ELF_ST_VISIBILITY (h->other)
3544 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH		 3545 {
3546 /* This is actually a static link, or it is a -Bsymbolic
3547 link and the symbol is defined locally, or the symbol
407443a3 3548 was forced to be local because of a version file. We
51e0a107
JH		 3549 must initialize this entry in the global offset table.
3550 Since the offset must always be a multiple of 8, we
3551 use the least significant bit to record whether we
3552 have initialized it already.
3553
3554 When doing a dynamic link, we create a .rela.got
407443a3
AJ		 3555 relocation entry to initialize the value. This is
3556 done in the finish_dynamic_symbol routine. */
51e0a107
JH		 3557 if ((off & 1) != 0)
3558 off &= ~1;
3559 else
3560 {
3561 bfd_put_64 (output_bfd, relocation,
7b81dfbb
AJ		 3562 base_got->contents + off);
3563 /* Note that this is harmless for the GOTPLT64 case,
eed180f8 3564 as -1 | 1 still is -1. */
51e0a107
JH		 3565 h->got.offset |= 1;
3566 }
3567 }
053579d7 3568 else
b34976b6 3569 unresolved_reloc = FALSE;
70256ad8 3570 }
51e0a107
JH		 3571 else
3572 {
c434dee6
AJ		 3573 if (local_got_offsets == NULL)
3574 abort ();
51e0a107
JH		 3575
3576 off = local_got_offsets[r_symndx];
3577
3578 /* The offset must always be a multiple of 8. We use
407443a3
AJ		 3579 the least significant bit to record whether we have
3580 already generated the necessary reloc. */
51e0a107
JH		 3581 if ((off & 1) != 0)
3582 off &= ~1;
3583 else
3584 {
c434dee6 3585 bfd_put_64 (output_bfd, relocation,
7b81dfbb 3586 base_got->contents + off);
51e0a107
JH		 3587
3588 if (info->shared)
3589 {
947216bf 3590 asection *s;
51e0a107 3591 Elf_Internal_Rela outrel;
70256ad8 3592
51e0a107
JH		 3593 /* We need to generate a R_X86_64_RELATIVE reloc
3594 for the dynamic linker. */
6de2ae4a 3595 s = htab->elf.srelgot;
947216bf 3596 if (s == NULL)
c434dee6 3597 abort ();
51e0a107 3598
7b81dfbb
AJ		 3599 outrel.r_offset = (base_got->output_section->vma
3600 + base_got->output_offset
51e0a107 3601 + off);
351f65ca 3602 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
51e0a107 3603 outrel.r_addend = relocation;
351f65ca 3604 elf_append_rela (output_bfd, s, &outrel);
51e0a107
JH		 3605 }
3606
3607 local_got_offsets[r_symndx] |= 1;
3608 }
51e0a107 3609 }
6a2bda3f 3610
c434dee6
AJ		 3611 if (off >= (bfd_vma) -2)
3612 abort ();
3613
7b81dfbb
AJ		 3614 relocation = base_got->output_section->vma
3615 + base_got->output_offset + off;
3616 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
6de2ae4a
L		 3617 relocation -= htab->elf.sgotplt->output_section->vma
3618 - htab->elf.sgotplt->output_offset;
c434dee6 3619
70256ad8
AJ		 3620 break;
3621
d6ab8113
JB		 3622 case R_X86_64_GOTOFF64:
3623 /* Relocation is relative to the start of the global offset
3624 table. */
3625
3626 /* Check to make sure it isn't a protected function symbol
3627 for shared library since it may not be local when used
3628 as function address. */
bdb892b9 3629 if (!info->executable
d6ab8113 3630 && h
bdb892b9 3631 && !SYMBOLIC_BIND (info, h)
d6ab8113
JB		 3632 && h->def_regular
3633 && h->type == STT_FUNC
3634 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3635 {
3636 (*_bfd_error_handler)
3637 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3638 input_bfd, h->root.root.string);
3639 bfd_set_error (bfd_error_bad_value);
3640 return FALSE;
3641 }
3642
3643 /* Note that sgot is not involved in this
3644 calculation. We always want the start of .got.plt. If we
3645 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3646 permitted by the ABI, we might have to change this
3647 calculation. */
6de2ae4a
L		 3648 relocation -= htab->elf.sgotplt->output_section->vma
3649 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 3650 break;
3651
3652 case R_X86_64_GOTPC32:
7b81dfbb 3653 case R_X86_64_GOTPC64:
d6ab8113 3654 /* Use global offset table as symbol value. */
6de2ae4a
L		 3655 relocation = htab->elf.sgotplt->output_section->vma
3656 + htab->elf.sgotplt->output_offset;
d6ab8113
JB		 3657 unresolved_reloc = FALSE;
3658 break;
7b81dfbb
AJ		 3659
3660 case R_X86_64_PLTOFF64:
3661 /* Relocation is PLT entry relative to GOT. For local
3662 symbols it's the symbol itself relative to GOT. */
eed180f8 3663 if (h != NULL
7b81dfbb
AJ		 3664 /* See PLT32 handling. */
3665 && h->plt.offset != (bfd_vma) -1
6de2ae4a 3666 && htab->elf.splt != NULL)
7b81dfbb 3667 {
6de2ae4a
L		 3668 relocation = (htab->elf.splt->output_section->vma
3669 + htab->elf.splt->output_offset
7b81dfbb
AJ		 3670 + h->plt.offset);
3671 unresolved_reloc = FALSE;
3672 }
3673
6de2ae4a
L		 3674 relocation -= htab->elf.sgotplt->output_section->vma
3675 + htab->elf.sgotplt->output_offset;
7b81dfbb 3676 break;
d6ab8113 3677
70256ad8
AJ		 3678 case R_X86_64_PLT32:
3679 /* Relocation is to the entry for this symbol in the
3680 procedure linkage table. */
3681
3682 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 3683 without using the procedure linkage table. */
70256ad8
AJ		 3684 if (h == NULL)
3685 break;
3686
c434dee6 3687 if (h->plt.offset == (bfd_vma) -1
6de2ae4a 3688 || htab->elf.splt == NULL)
70256ad8
AJ		 3689 {
3690 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ		 3691 happens when statically linking PIC code, or when
3692 using -Bsymbolic. */
70256ad8
AJ		 3693 break;
3694 }
3695
6de2ae4a
L		 3696 relocation = (htab->elf.splt->output_section->vma
3697 + htab->elf.splt->output_offset
70256ad8 3698 + h->plt.offset);
b34976b6 3699 unresolved_reloc = FALSE;
70256ad8
AJ		 3700 break;
3701
fd8ab9e5
AJ		 3702 case R_X86_64_PC8:
3703 case R_X86_64_PC16:
3704 case R_X86_64_PC32:
6610a52d 3705 if (info->shared
ba3bee0b 3706 && (input_section->flags & SEC_ALLOC) != 0
90f487df 3707 && (input_section->flags & SEC_READONLY) != 0
41bed6dd 3708 && h != NULL)
6610a52d 3709 {
41bed6dd
L		 3710 bfd_boolean fail = FALSE;
3711 bfd_boolean branch
3712 = (r_type == R_X86_64_PC32
3713 && is_32bit_relative_branch (contents, rel->r_offset));
3714
3715 if (SYMBOL_REFERENCES_LOCAL (info, h))
3716 {
3717 /* Symbol is referenced locally. Make sure it is
3718 defined locally or for a branch. */
3719 fail = !h->def_regular && !branch;
3720 }
90f487df 3721 else
41bed6dd
L		 3722 {
3723 /* Symbol isn't referenced locally. We only allow
3724 branch to symbol with non-default visibility. */
3725 fail = (!branch
3726 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3727 }
3728
3729 if (fail)
3730 {
3731 const char *fmt;
3732 const char *v;
3733 const char *pic = "";
3734
3735 switch (ELF_ST_VISIBILITY (h->other))
3736 {
3737 case STV_HIDDEN:
3738 v = _("hidden symbol");
3739 break;
3740 case STV_INTERNAL:
3741 v = _("internal symbol");
3742 break;
3743 case STV_PROTECTED:
3744 v = _("protected symbol");
3745 break;
3746 default:
3747 v = _("symbol");
3748 pic = _("; recompile with -fPIC");
3749 break;
3750 }
3751
3752 if (h->def_regular)
3753 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3754 else
3755 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3756
3757 (*_bfd_error_handler) (fmt, input_bfd,
3758 x86_64_elf_howto_table[r_type].name,
3759 v, h->root.root.string, pic);
3760 bfd_set_error (bfd_error_bad_value);
3761 return FALSE;
3762 }
6610a52d
L		 3763 }
3764 /* Fall through. */
3765
70256ad8
AJ		 3766 case R_X86_64_8:
3767 case R_X86_64_16:
3768 case R_X86_64_32:
d6ab8113 3769 case R_X86_64_PC64:
6b3db546 3770 case R_X86_64_64:
80643fbc 3771 /* FIXME: The ABI says the linker should make sure the value is
407443a3 3772 the same when it's zeroextended to 64 bit. */
c434dee6 3773
b1e24c02 3774 if ((input_section->flags & SEC_ALLOC) == 0)
c434dee6
AJ		 3775 break;
3776
3777 if ((info->shared
4bc6e03a
AJ		 3778 && (h == NULL
3779 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3780 || h->root.type != bfd_link_hash_undefweak)
d8045f23
NC		 3781 && (! IS_X86_64_PCREL_TYPE (r_type)
3782 || ! SYMBOL_CALLS_LOCAL (info, h)))
d40d037c
AJ		 3783 || (ELIMINATE_COPY_RELOCS
3784 && !info->shared
c434dee6
AJ		 3785 && h != NULL
3786 && h->dynindx != -1
f5385ebf
AM		 3787 && !h->non_got_ref
3788 && ((h->def_dynamic
3789 && !h->def_regular)
c434dee6 3790 || h->root.type == bfd_link_hash_undefweak
0f88be7a 3791 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ		 3792 {
3793 Elf_Internal_Rela outrel;
b34976b6 3794 bfd_boolean skip, relocate;
c434dee6 3795 asection *sreloc;
70256ad8
AJ		 3796
3797 /* When generating a shared object, these relocations
3798 are copied into the output file to be resolved at run
407443a3 3799 time. */
b34976b6
AM		 3800 skip = FALSE;
3801 relocate = FALSE;
70256ad8 3802
c629eae0
JJ		 3803 outrel.r_offset =
3804 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 3805 rel->r_offset);
c629eae0 3806 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 3807 skip = TRUE;
0fb19cbc 3808 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 3809 skip = TRUE, relocate = TRUE;
70256ad8
AJ		 3810
3811 outrel.r_offset += (input_section->output_section->vma
3812 + input_section->output_offset);
3813
3814 if (skip)
0bb2d96a 3815 memset (&outrel, 0, sizeof outrel);
c434dee6 3816
fd8ab9e5
AJ		 3817 /* h->dynindx may be -1 if this symbol was marked to
3818 become local. */
3819 else if (h != NULL
c434dee6 3820 && h->dynindx != -1
d8045f23
NC		 3821 && (IS_X86_64_PCREL_TYPE (r_type)
3822 || ! info->shared
3823 || ! SYMBOLIC_BIND (info, h)
3824 || ! h->def_regular))
70256ad8 3825 {
351f65ca 3826 outrel.r_info = htab->r_info (h->dynindx, r_type);
c434dee6 3827 outrel.r_addend = rel->r_addend;
70256ad8
AJ		 3828 }
3829 else
3830 {
c434dee6 3831 /* This symbol is local, or marked to become local. */
248775ba 3832 if (r_type == htab->pointer_r_type)
607c0e09 3833 {
b34976b6 3834 relocate = TRUE;
351f65ca 3835 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
607c0e09
AS		 3836 outrel.r_addend = relocation + rel->r_addend;
3837 }
64d25c44
L		 3838 else if (r_type == R_X86_64_64
3839 && !ABI_64_P (output_bfd))
3840 {
3841 relocate = TRUE;
3842 outrel.r_info = htab->r_info (0,
3843 R_X86_64_RELATIVE64);
3844 outrel.r_addend = relocation + rel->r_addend;
8cf0d2dd
L		 3845 /* Check addend overflow. */
3846 if ((outrel.r_addend & 0x80000000)
3847 != (rel->r_addend & 0x80000000))
3848 {
3849 const char *name;
268a8d3a 3850 int addend = rel->r_addend;
8cf0d2dd
L		 3851 if (h && h->root.root.string)
3852 name = h->root.root.string;
3853 else
3854 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3855 sym, NULL);
6f2c9068
L		 3856 if (addend < 0)
3857 (*_bfd_error_handler)
268a8d3a 3858 (_("%B: addend -0x%x in relocation %s against "
6f2c9068
L		 3859 "symbol `%s' at 0x%lx in section `%A' is "
3860 "out of range"),
3861 input_bfd, input_section, addend,
3862 x86_64_elf_howto_table[r_type].name,
3863 name, (unsigned long) rel->r_offset);
3864 else
3865 (*_bfd_error_handler)
268a8d3a 3866 (_("%B: addend 0x%x in relocation %s against "
6f2c9068
L		 3867 "symbol `%s' at 0x%lx in section `%A' is "
3868 "out of range"),
3869 input_bfd, input_section, addend,
3870 x86_64_elf_howto_table[r_type].name,
3871 name, (unsigned long) rel->r_offset);
8cf0d2dd
L		 3872 bfd_set_error (bfd_error_bad_value);
3873 return FALSE;
3874 }
64d25c44 3875 }
607c0e09
AS		 3876 else
3877 {
3878 long sindx;
3879
8517fae7 3880 if (bfd_is_abs_section (sec))
607c0e09
AS		 3881 sindx = 0;
3882 else if (sec == NULL || sec->owner == NULL)
3883 {
3884 bfd_set_error (bfd_error_bad_value);
b34976b6 3885 return FALSE;
607c0e09
AS		 3886 }
3887 else
3888 {
3889 asection *osec;
3890
74541ad4
AM		 3891 /* We are turning this relocation into one
3892 against a section symbol. It would be
3893 proper to subtract the symbol's value,
3894 osec->vma, from the emitted reloc addend,
3895 but ld.so expects buggy relocs. */
607c0e09
AS		 3896 osec = sec->output_section;
3897 sindx = elf_section_data (osec)->dynindx;
74541ad4
AM		 3898 if (sindx == 0)
3899 {
3900 asection *oi = htab->elf.text_index_section;
3901 sindx = elf_section_data (oi)->dynindx;
3902 }
3903 BFD_ASSERT (sindx != 0);
607c0e09
AS		 3904 }
3905
351f65ca 3906 outrel.r_info = htab->r_info (sindx, r_type);
607c0e09
AS		 3907 outrel.r_addend = relocation + rel->r_addend;
3908 }
70256ad8
AJ		 3909 }
3910
cbe950e9 3911 sreloc = elf_section_data (input_section)->sreloc;
d8045f23 3912
62d78908
L		 3913 if (sreloc == NULL || sreloc->contents == NULL)
3914 {
3915 r = bfd_reloc_notsupported;
3916 goto check_relocation_error;
3917 }
c434dee6 3918
351f65ca 3919 elf_append_rela (output_bfd, sreloc, &outrel);
70256ad8
AJ		 3920
3921 /* If this reloc is against an external symbol, we do
3922 not want to fiddle with the addend. Otherwise, we
3923 need to include the symbol value so that it becomes
3924 an addend for the dynamic reloc. */
0f88be7a 3925 if (! relocate)
70256ad8
AJ		 3926 continue;
3927 }
3928
3929 break;
3930
bffbf940 3931 case R_X86_64_TLSGD:
67a4f2b7
AO		 3932 case R_X86_64_GOTPC32_TLSDESC:
3933 case R_X86_64_TLSDESC_CALL:
bffbf940 3934 case R_X86_64_GOTTPOFF:
bffbf940
JJ		 3935 tls_type = GOT_UNKNOWN;
3936 if (h == NULL && local_got_offsets)
351f65ca 3937 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
bffbf940 3938 else if (h != NULL)
351f65ca 3939 tls_type = elf_x86_64_hash_entry (h)->tls_type;
142411ca 3940
351f65ca
L		 3941 if (! elf_x86_64_tls_transition (info, input_bfd,
3942 input_section, contents,
3943 symtab_hdr, sym_hashes,
3944 &r_type, tls_type, rel,
3945 relend, h, r_symndx))
534a31f6 3946 return FALSE;
bffbf940
JJ		 3947
3948 if (r_type == R_X86_64_TPOFF32)
3949 {
142411ca
L		 3950 bfd_vma roff = rel->r_offset;
3951
bffbf940 3952 BFD_ASSERT (! unresolved_reloc);
142411ca 3953
351f65ca 3954 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
bffbf940 3955 {
52bc799a 3956 /* GD->LE transition. For 64bit, change
abcf1d52 3957 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
a3fadc9a 3958 .word 0x6666; rex64; call __tls_get_addr
52bc799a 3959 into:
bffbf940 3960 movq %fs:0, %rax
52bc799a
L		 3961 leaq foo@tpoff(%rax), %rax
3962 For 32bit, change
3963 leaq foo@tlsgd(%rip), %rdi
3964 .word 0x6666; rex64; call __tls_get_addr
3965 into:
3966 movl %fs:0, %eax
bffbf940 3967 leaq foo@tpoff(%rax), %rax */
52bc799a
L		 3968 if (ABI_64_P (output_bfd))
3969 memcpy (contents + roff - 4,
3970 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3971 16);
3972 else
3973 memcpy (contents + roff - 3,
3974 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3975 15);
eb4ff4d6 3976 bfd_put_32 (output_bfd,
351f65ca 3977 elf_x86_64_tpoff (info, relocation),
142411ca 3978 contents + roff + 8);
a3fadc9a 3979 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
bffbf940
JJ		 3980 rel++;
3981 continue;
3982 }
351f65ca 3983 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
67a4f2b7
AO		 3984 {
3985 /* GDesc -> LE transition.
3986 It's originally something like:
3987 leaq x@tlsdesc(%rip), %rax
3988
3989 Change it to:
c9736ba0 3990 movl $x@tpoff, %rax. */
67a4f2b7 3991
c9736ba0 3992 unsigned int val, type;
67a4f2b7 3993
67a4f2b7 3994 type = bfd_get_8 (input_bfd, contents + roff - 3);
67a4f2b7 3995 val = bfd_get_8 (input_bfd, contents + roff - 1);
67a4f2b7
AO		 3996 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
3997 contents + roff - 3);
3998 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
3999 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4000 contents + roff - 1);
eb4ff4d6 4001 bfd_put_32 (output_bfd,
351f65ca 4002 elf_x86_64_tpoff (info, relocation),
67a4f2b7
AO		 4003 contents + roff);
4004 continue;
4005 }
351f65ca 4006 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
67a4f2b7
AO		 4007 {
4008 /* GDesc -> LE transition.
4009 It's originally:
4010 call *(%rax)
4011 Turn it into:
142411ca 4012 xchg %ax,%ax. */
10efb593 4013 bfd_put_8 (output_bfd, 0x66, contents + roff);
67a4f2b7
AO		 4014 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4015 continue;
4016 }
351f65ca 4017 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
bffbf940 4018 {
bffbf940
JJ		 4019 /* IE->LE transition:
4020 Originally it can be one of:
4021 movq foo@gottpoff(%rip), %reg
4022 addq foo@gottpoff(%rip), %reg
4023 We change it into:
4024 movq $foo, %reg
4025 leaq foo(%reg), %reg
4026 addq $foo, %reg. */
142411ca
L		 4027
4028 unsigned int val, type, reg;
4029
4030 val = bfd_get_8 (input_bfd, contents + roff - 3);
4031 type = bfd_get_8 (input_bfd, contents + roff - 2);
4032 reg = bfd_get_8 (input_bfd, contents + roff - 1);
bffbf940 4033 reg >>= 3;
bffbf940
JJ		 4034 if (type == 0x8b)
4035 {
4036 /* movq */
4037 if (val == 0x4c)
4038 bfd_put_8 (output_bfd, 0x49,
142411ca 4039 contents + roff - 3);
4a4c5f25
L		 4040 else if (!ABI_64_P (output_bfd) && val == 0x44)
4041 bfd_put_8 (output_bfd, 0x41,
4042 contents + roff - 3);
bffbf940 4043 bfd_put_8 (output_bfd, 0xc7,
142411ca 4044 contents + roff - 2);
bffbf940 4045 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4046 contents + roff - 1);
bffbf940
JJ		 4047 }
4048 else if (reg == 4)
4049 {
4050 /* addq -> addq - addressing with %rsp/%r12 is
4051 special */
4052 if (val == 0x4c)
4053 bfd_put_8 (output_bfd, 0x49,
142411ca 4054 contents + roff - 3);
4a4c5f25
L		 4055 else if (!ABI_64_P (output_bfd) && val == 0x44)
4056 bfd_put_8 (output_bfd, 0x41,
4057 contents + roff - 3);
bffbf940 4058 bfd_put_8 (output_bfd, 0x81,
142411ca 4059 contents + roff - 2);
bffbf940 4060 bfd_put_8 (output_bfd, 0xc0 | reg,
142411ca 4061 contents + roff - 1);
bffbf940
JJ		 4062 }
4063 else
4064 {
4065 /* addq -> leaq */
4066 if (val == 0x4c)
4067 bfd_put_8 (output_bfd, 0x4d,
142411ca 4068 contents + roff - 3);
4a4c5f25
L		 4069 else if (!ABI_64_P (output_bfd) && val == 0x44)
4070 bfd_put_8 (output_bfd, 0x45,
4071 contents + roff - 3);
bffbf940 4072 bfd_put_8 (output_bfd, 0x8d,
142411ca 4073 contents + roff - 2);
bffbf940 4074 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
142411ca 4075 contents + roff - 1);
bffbf940 4076 }
eb4ff4d6 4077 bfd_put_32 (output_bfd,
351f65ca 4078 elf_x86_64_tpoff (info, relocation),
142411ca 4079 contents + roff);
bffbf940
JJ		 4080 continue;
4081 }
142411ca
L		 4082 else
4083 BFD_ASSERT (FALSE);
bffbf940
JJ		 4084 }
4085
6de2ae4a 4086 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4087 abort ();
4088
4089 if (h != NULL)
67a4f2b7
AO		 4090 {
4091 off = h->got.offset;
351f65ca 4092 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
67a4f2b7 4093 }
bffbf940
JJ		 4094 else
4095 {
4096 if (local_got_offsets == NULL)
4097 abort ();
4098
4099 off = local_got_offsets[r_symndx];
67a4f2b7 4100 offplt = local_tlsdesc_gotents[r_symndx];
bffbf940
JJ		 4101 }
4102
4103 if ((off & 1) != 0)
4104 off &= ~1;
26e41594 4105 else
bffbf940
JJ		 4106 {
4107 Elf_Internal_Rela outrel;
bffbf940 4108 int dr_type, indx;
67a4f2b7 4109 asection *sreloc;
bffbf940 4110
6de2ae4a 4111 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4112 abort ();
4113
67a4f2b7
AO		 4114 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4115
4116 if (GOT_TLS_GDESC_P (tls_type))
4117 {
351f65ca 4118 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
67a4f2b7 4119 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
6de2ae4a
L		 4120 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4121 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4122 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4123 + offplt
4124 + htab->sgotplt_jump_table_size);
6de2ae4a 4125 sreloc = htab->elf.srelplt;
67a4f2b7 4126 if (indx == 0)
351f65ca 4127 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
67a4f2b7
AO		 4128 else
4129 outrel.r_addend = 0;
351f65ca 4130 elf_append_rela (output_bfd, sreloc, &outrel);
67a4f2b7
AO		 4131 }
4132
6de2ae4a 4133 sreloc = htab->elf.srelgot;
67a4f2b7 4134
6de2ae4a
L		 4135 outrel.r_offset = (htab->elf.sgot->output_section->vma
4136 + htab->elf.sgot->output_offset + off);
bffbf940 4137
67a4f2b7 4138 if (GOT_TLS_GD_P (tls_type))
bffbf940 4139 dr_type = R_X86_64_DTPMOD64;
67a4f2b7
AO		 4140 else if (GOT_TLS_GDESC_P (tls_type))
4141 goto dr_done;
bffbf940
JJ		 4142 else
4143 dr_type = R_X86_64_TPOFF64;
4144
6de2ae4a 4145 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
bffbf940 4146 outrel.r_addend = 0;
67a4f2b7
AO		 4147 if ((dr_type == R_X86_64_TPOFF64
4148 || dr_type == R_X86_64_TLSDESC) && indx == 0)
351f65ca
L		 4149 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4150 outrel.r_info = htab->r_info (indx, dr_type);
bffbf940 4151
351f65ca 4152 elf_append_rela (output_bfd, sreloc, &outrel);
bffbf940 4153
67a4f2b7 4154 if (GOT_TLS_GD_P (tls_type))
bffbf940
JJ		 4155 {
4156 if (indx == 0)
4157 {
d40d037c 4158 BFD_ASSERT (! unresolved_reloc);
bffbf940 4159 bfd_put_64 (output_bfd,
351f65ca 4160 relocation - elf_x86_64_dtpoff_base (info),
6de2ae4a 4161 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
bffbf940
JJ		 4162 }
4163 else
4164 {
4165 bfd_put_64 (output_bfd, 0,
6de2ae4a 4166 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4167 outrel.r_info = htab->r_info (indx,
bffbf940
JJ		 4168 R_X86_64_DTPOFF64);
4169 outrel.r_offset += GOT_ENTRY_SIZE;
351f65ca 4170 elf_append_rela (output_bfd, sreloc,
464d3bd4 4171 &outrel);
bffbf940
JJ		 4172 }
4173 }
4174
67a4f2b7 4175 dr_done:
bffbf940
JJ		 4176 if (h != NULL)
4177 h->got.offset |= 1;
4178 else
4179 local_got_offsets[r_symndx] |= 1;
4180 }
4181
67a4f2b7
AO		 4182 if (off >= (bfd_vma) -2
4183 && ! GOT_TLS_GDESC_P (tls_type))
bffbf940 4184 abort ();
351f65ca 4185 if (r_type == ELF32_R_TYPE (rel->r_info))
bffbf940 4186 {
67a4f2b7
AO		 4187 if (r_type == R_X86_64_GOTPC32_TLSDESC
4188 || r_type == R_X86_64_TLSDESC_CALL)
6de2ae4a
L		 4189 relocation = htab->elf.sgotplt->output_section->vma
4190 + htab->elf.sgotplt->output_offset
67a4f2b7
AO		 4191 + offplt + htab->sgotplt_jump_table_size;
4192 else
6de2ae4a
L		 4193 relocation = htab->elf.sgot->output_section->vma
4194 + htab->elf.sgot->output_offset + off;
b34976b6 4195 unresolved_reloc = FALSE;
bffbf940 4196 }
142411ca 4197 else
67a4f2b7 4198 {
142411ca 4199 bfd_vma roff = rel->r_offset;
67a4f2b7 4200
351f65ca 4201 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
142411ca 4202 {
52bc799a 4203 /* GD->IE transition. For 64bit, change
142411ca
L		 4204 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4205 .word 0x6666; rex64; call __tls_get_addr@plt
52bc799a 4206 into:
142411ca 4207 movq %fs:0, %rax
52bc799a
L		 4208 addq foo@gottpoff(%rip), %rax
4209 For 32bit, change
4210 leaq foo@tlsgd(%rip), %rdi
4211 .word 0x6666; rex64; call __tls_get_addr@plt
4212 into:
4213 movl %fs:0, %eax
142411ca 4214 addq foo@gottpoff(%rip), %rax */
52bc799a
L		 4215 if (ABI_64_P (output_bfd))
4216 memcpy (contents + roff - 4,
4217 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4218 16);
4219 else
4220 memcpy (contents + roff - 3,
4221 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4222 15);
142411ca 4223
6de2ae4a
L		 4224 relocation = (htab->elf.sgot->output_section->vma
4225 + htab->elf.sgot->output_offset + off
142411ca
L		 4226 - roff
4227 - input_section->output_section->vma
4228 - input_section->output_offset
4229 - 12);
4230 bfd_put_32 (output_bfd, relocation,
4231 contents + roff + 8);
4232 /* Skip R_X86_64_PLT32. */
4233 rel++;
4234 continue;
4235 }
351f65ca 4236 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
142411ca
L		 4237 {
4238 /* GDesc -> IE transition.
4239 It's originally something like:
4240 leaq x@tlsdesc(%rip), %rax
67a4f2b7 4241
142411ca 4242 Change it to:
c9736ba0 4243 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
67a4f2b7 4244
142411ca
L		 4245 /* Now modify the instruction as appropriate. To
4246 turn a leaq into a movq in the form we use it, it
4247 suffices to change the second byte from 0x8d to
4248 0x8b. */
4249 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4250
4251 bfd_put_32 (output_bfd,
6de2ae4a
L		 4252 htab->elf.sgot->output_section->vma
4253 + htab->elf.sgot->output_offset + off
142411ca
L		 4254 - rel->r_offset
4255 - input_section->output_section->vma
4256 - input_section->output_offset
4257 - 4,
4258 contents + roff);
4259 continue;
4260 }
351f65ca 4261 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
142411ca
L		 4262 {
4263 /* GDesc -> IE transition.
4264 It's originally:
4265 call *(%rax)
4266
4267 Change it to:
c9736ba0 4268 xchg %ax, %ax. */
142411ca 4269
142411ca
L		 4270 bfd_put_8 (output_bfd, 0x66, contents + roff);
4271 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4272 continue;
4273 }
4274 else
4275 BFD_ASSERT (FALSE);
67a4f2b7 4276 }
bffbf940
JJ		 4277 break;
4278
4279 case R_X86_64_TLSLD:
351f65ca
L		 4280 if (! elf_x86_64_tls_transition (info, input_bfd,
4281 input_section, contents,
4282 symtab_hdr, sym_hashes,
4283 &r_type, GOT_UNKNOWN,
4284 rel, relend, h, r_symndx))
142411ca 4285 return FALSE;
a3fadc9a 4286
142411ca
L		 4287 if (r_type != R_X86_64_TLSLD)
4288 {
bffbf940 4289 /* LD->LE transition:
a3fadc9a 4290 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
52bc799a
L		 4291 For 64bit, we change it into:
4292 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4293 For 32bit, we change it into:
4294 nopl 0x0(%rax); movl %fs:0, %eax. */
142411ca
L		 4295
4296 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
52bc799a
L		 4297 if (ABI_64_P (output_bfd))
4298 memcpy (contents + rel->r_offset - 3,
4299 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4300 else
4301 memcpy (contents + rel->r_offset - 3,
4302 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
a3fadc9a 4303 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
bffbf940
JJ		 4304 rel++;
4305 continue;
4306 }
4307
6de2ae4a 4308 if (htab->elf.sgot == NULL)
bffbf940
JJ		 4309 abort ();
4310
4311 off = htab->tls_ld_got.offset;
4312 if (off & 1)
4313 off &= ~1;
4314 else
4315 {
4316 Elf_Internal_Rela outrel;
bffbf940 4317
6de2ae4a 4318 if (htab->elf.srelgot == NULL)
bffbf940
JJ		 4319 abort ();
4320
6de2ae4a
L		 4321 outrel.r_offset = (htab->elf.sgot->output_section->vma
4322 + htab->elf.sgot->output_offset + off);
bffbf940
JJ		 4323
4324 bfd_put_64 (output_bfd, 0,
6de2ae4a 4325 htab->elf.sgot->contents + off);
bffbf940 4326 bfd_put_64 (output_bfd, 0,
6de2ae4a 4327 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
351f65ca 4328 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
bffbf940 4329 outrel.r_addend = 0;
351f65ca 4330 elf_append_rela (output_bfd, htab->elf.srelgot,
464d3bd4 4331 &outrel);
bffbf940
JJ		 4332 htab->tls_ld_got.offset |= 1;
4333 }
6de2ae4a
L		 4334 relocation = htab->elf.sgot->output_section->vma
4335 + htab->elf.sgot->output_offset + off;
b34976b6 4336 unresolved_reloc = FALSE;
bffbf940
JJ		 4337 break;
4338
4339 case R_X86_64_DTPOFF32:
1d85728f 4340 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
351f65ca 4341 relocation -= elf_x86_64_dtpoff_base (info);
bffbf940 4342 else
351f65ca 4343 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4344 break;
4345
4346 case R_X86_64_TPOFF32:
6769d501 4347 case R_X86_64_TPOFF64:
9b769489 4348 BFD_ASSERT (info->executable);
351f65ca 4349 relocation = elf_x86_64_tpoff (info, relocation);
bffbf940
JJ		 4350 break;
4351
70256ad8
AJ		 4352 default:
4353 break;
4354 }
8d88c4ca 4355
239e1f3a
AM		 4356 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4357 because such sections are not SEC_ALLOC and thus ld.so will
4358 not process them. */
c434dee6 4359 if (unresolved_reloc
239e1f3a 4360 && !((input_section->flags & SEC_DEBUGGING) != 0
1d5316ab
AM		 4361 && h->def_dynamic)
4362 && _bfd_elf_section_offset (output_bfd, info, input_section,
4363 rel->r_offset) != (bfd_vma) -1)
a040981f
L		 4364 {
4365 (*_bfd_error_handler)
4366 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4367 input_bfd,
4368 input_section,
4369 (long) rel->r_offset,
4370 howto->name,
4371 h->root.root.string);
4372 return FALSE;
4373 }
c434dee6 4374
cbe950e9 4375do_relocation:
8d88c4ca 4376 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ		 4377 contents, rel->r_offset,
4378 relocation, rel->r_addend);
8d88c4ca 4379
62d78908 4380check_relocation_error:
8d88c4ca 4381 if (r != bfd_reloc_ok)
8da6118f 4382 {
c434dee6
AJ		 4383 const char *name;
4384
4385 if (h != NULL)
4386 name = h->root.root.string;
4387 else
8da6118f 4388 {
c434dee6
AJ		 4389 name = bfd_elf_string_from_elf_section (input_bfd,
4390 symtab_hdr->sh_link,
4391 sym->st_name);
4392 if (name == NULL)
b34976b6 4393 return FALSE;
c434dee6
AJ		 4394 if (*name == '\0')
4395 name = bfd_section_name (input_bfd, sec);
4396 }
4397
4398 if (r == bfd_reloc_overflow)
4399 {
c434dee6 4400 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 4401 (info, (h ? &h->root : NULL), name, howto->name,
4402 (bfd_vma) 0, input_bfd, input_section,
4403 rel->r_offset)))
b34976b6 4404 return FALSE;
c434dee6
AJ		 4405 }
4406 else
4407 {
4408 (*_bfd_error_handler)
bb95161d 4409 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
d003868e 4410 input_bfd, input_section,
c434dee6 4411 (long) rel->r_offset, name, (int) r);
b34976b6 4412 return FALSE;
8da6118f
KH		 4413 }
4414 }
8d88c4ca 4415 }
70256ad8 4416
b34976b6 4417 return TRUE;
70256ad8
AJ		 4418}
4419
4420/* Finish up dynamic symbol handling. We set the contents of various
4421 dynamic sections here. */
4422
b34976b6 4423static bfd_boolean
351f65ca
L		 4424elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4425 struct bfd_link_info *info,
4426 struct elf_link_hash_entry *h,
220cf809 4427 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
70256ad8 4428{
351f65ca 4429 struct elf_x86_64_link_hash_table *htab;
eed180f8
RM		 4430 const struct elf_x86_64_backend_data *const abed
4431 = get_elf_x86_64_backend_data (output_bfd);
70256ad8 4432
351f65ca 4433 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 4434 if (htab == NULL)
4435 return FALSE;
70256ad8
AJ		 4436
4437 if (h->plt.offset != (bfd_vma) -1)
4438 {
70256ad8
AJ		 4439 bfd_vma plt_index;
4440 bfd_vma got_offset;
4441 Elf_Internal_Rela rela;
947216bf 4442 bfd_byte *loc;
cbe950e9 4443 asection *plt, *gotplt, *relplt;
351f65ca 4444 const struct elf_backend_data *bed;
cbe950e9
L		 4445
4446 /* When building a static executable, use .iplt, .igot.plt and
4447 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6de2ae4a 4448 if (htab->elf.splt != NULL)
cbe950e9 4449 {
6de2ae4a
L		 4450 plt = htab->elf.splt;
4451 gotplt = htab->elf.sgotplt;
4452 relplt = htab->elf.srelplt;
cbe950e9
L		 4453 }
4454 else
4455 {
6de2ae4a
L		 4456 plt = htab->elf.iplt;
4457 gotplt = htab->elf.igotplt;
4458 relplt = htab->elf.irelplt;
cbe950e9 4459 }
70256ad8
AJ		 4460
4461 /* This symbol has an entry in the procedure linkage table. Set
407443a3 4462 it up. */
cbe950e9
L		 4463 if ((h->dynindx == -1
4464 && !((h->forced_local || info->executable)
4465 && h->def_regular
4466 && h->type == STT_GNU_IFUNC))
4467 || plt == NULL
4468 || gotplt == NULL
4469 || relplt == NULL)
cec7f46a 4470 abort ();
70256ad8
AJ		 4471
4472 /* Get the index in the procedure linkage table which
4473 corresponds to this symbol. This is the index of this symbol
4474 in all the symbols for which we are making plt entries. The
cbe950e9 4475 first entry in the procedure linkage table is reserved.
6bbec505 4476
cbe950e9 4477 Get the offset into the .got table of the entry that
407443a3 4478 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
cbe950e9
L		 4479 bytes. The first three are reserved for the dynamic linker.
4480
4481 For static executables, we don't reserve anything. */
4482
6de2ae4a 4483 if (plt == htab->elf.splt)
cbe950e9 4484 {
eed180f8 4485 got_offset = h->plt.offset / abed->plt_entry_size - 1;
e1f98742 4486 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
cbe950e9
L		 4487 }
4488 else
4489 {
eed180f8 4490 got_offset = h->plt.offset / abed->plt_entry_size;
e1f98742 4491 got_offset = got_offset * GOT_ENTRY_SIZE;
cbe950e9 4492 }
70256ad8
AJ		 4493
4494 /* Fill in the entry in the procedure linkage table. */
eed180f8
RM		 4495 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
4496 abed->plt_entry_size);
4497
4498 /* Insert the relocation positions of the plt section. */
4499
4500 /* Put offset the PC-relative instruction referring to the GOT entry,
4501 subtracting the size of that instruction. */
653165cc 4502 bfd_put_32 (output_bfd,
eed180f8
RM		 4503 (gotplt->output_section->vma
4504 + gotplt->output_offset
4505 + got_offset
4506 - plt->output_section->vma
4507 - plt->output_offset
4508 - h->plt.offset
4509 - abed->plt_got_insn_size),
4510 plt->contents + h->plt.offset + abed->plt_got_offset);
cbe950e9 4511
653165cc 4512 /* Fill in the entry in the global offset table, initially this
eed180f8 4513 points to the second part of the PLT entry. */
cbe950e9
L		 4514 bfd_put_64 (output_bfd, (plt->output_section->vma
4515 + plt->output_offset
eed180f8 4516 + h->plt.offset + abed->plt_lazy_offset),
cbe950e9 4517 gotplt->contents + got_offset);
70256ad8
AJ		 4518
4519 /* Fill in the entry in the .rela.plt section. */
cbe950e9
L		 4520 rela.r_offset = (gotplt->output_section->vma
4521 + gotplt->output_offset
70256ad8 4522 + got_offset);
cbe950e9
L		 4523 if (h->dynindx == -1
4524 || ((info->executable
4525 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4526 && h->def_regular
4527 && h->type == STT_GNU_IFUNC))
4528 {
4529 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4530 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
351f65ca 4531 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
cbe950e9
L		 4532 rela.r_addend = (h->root.u.def.value
4533 + h->root.u.def.section->output_section->vma
4534 + h->root.u.def.section->output_offset);
e1f98742
L		 4535 /* R_X86_64_IRELATIVE comes last. */
4536 plt_index = htab->next_irelative_index--;
cbe950e9
L		 4537 }
4538 else
4539 {
351f65ca 4540 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
cbe950e9 4541 rela.r_addend = 0;
e1f98742
L		 4542 plt_index = htab->next_jump_slot_index++;
4543 }
4544
4545 /* Don't fill PLT entry for static executables. */
4546 if (plt == htab->elf.splt)
4547 {
4548 /* Put relocation index. */
4549 bfd_put_32 (output_bfd, plt_index,
eed180f8 4550 plt->contents + h->plt.offset + abed->plt_reloc_offset);
e1f98742 4551 /* Put offset for jmp .PLT0. */
eed180f8
RM		 4552 bfd_put_32 (output_bfd, - (h->plt.offset + abed->plt_plt_insn_end),
4553 plt->contents + h->plt.offset + abed->plt_plt_offset);
cbe950e9 4554 }
351f65ca
L		 4555
4556 bed = get_elf_backend_data (output_bfd);
4557 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
82e96e07 4558 bed->s->swap_reloca_out (output_bfd, &rela, loc);
70256ad8 4559
f5385ebf 4560 if (!h->def_regular)
70256ad8
AJ		 4561 {
4562 /* Mark the symbol as undefined, rather than as defined in
47a9f7b3
JJ		 4563 the .plt section. Leave the value if there were any
4564 relocations where pointer equality matters (this is a clue
c434dee6
AJ		 4565 for the dynamic linker, to make function pointer
4566 comparisons work between an application and shared
47a9f7b3
JJ		 4567 library), otherwise set it to zero. If a function is only
4568 called from a binary, there is no need to slow down
4569 shared libraries because of that. */
70256ad8 4570 sym->st_shndx = SHN_UNDEF;
f5385ebf 4571 if (!h->pointer_equality_needed)
47a9f7b3 4572 sym->st_value = 0;
70256ad8
AJ		 4573 }
4574 }
4575
bffbf940 4576 if (h->got.offset != (bfd_vma) -1
351f65ca
L		 4577 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
4578 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 4579 {
053579d7
AJ		 4580 Elf_Internal_Rela rela;
4581
4582 /* This symbol has an entry in the global offset table. Set it
bffbf940 4583 up. */
6de2ae4a 4584 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
c434dee6 4585 abort ();
053579d7 4586
6de2ae4a
L		 4587 rela.r_offset = (htab->elf.sgot->output_section->vma
4588 + htab->elf.sgot->output_offset
dc810e39 4589 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ		 4590
4591 /* If this is a static link, or it is a -Bsymbolic link and the
4592 symbol is defined locally or was forced to be local because
4593 of a version file, we just want to emit a RELATIVE reloc.
4594 The entry in the global offset table will already have been
4595 initialized in the relocate_section function. */
710ab287 4596 if (h->def_regular
0018b0a3
L		 4597 && h->type == STT_GNU_IFUNC)
4598 {
710ab287
L		 4599 if (info->shared)
4600 {
4601 /* Generate R_X86_64_GLOB_DAT. */
4602 goto do_glob_dat;
4603 }
4604 else
4605 {
90d60710
L		 4606 asection *plt;
4607
710ab287
L		 4608 if (!h->pointer_equality_needed)
4609 abort ();
4610
4611 /* For non-shared object, we can't use .got.plt, which
4612 contains the real function addres if we need pointer
4613 equality. We load the GOT entry with the PLT entry. */
90d60710 4614 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
710ab287
L		 4615 bfd_put_64 (output_bfd, (plt->output_section->vma
4616 + plt->output_offset
4617 + h->plt.offset),
6de2ae4a 4618 htab->elf.sgot->contents + h->got.offset);
710ab287
L		 4619 return TRUE;
4620 }
0018b0a3
L		 4621 }
4622 else if (info->shared
4623 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 4624 {
41bed6dd
L		 4625 if (!h->def_regular)
4626 return FALSE;
cc78d0af 4627 BFD_ASSERT((h->got.offset & 1) != 0);
351f65ca 4628 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
053579d7
AJ		 4629 rela.r_addend = (h->root.u.def.value
4630 + h->root.u.def.section->output_section->vma
4631 + h->root.u.def.section->output_offset);
4632 }
4633 else
4634 {
4635 BFD_ASSERT((h->got.offset & 1) == 0);
710ab287 4636do_glob_dat:
c434dee6 4637 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 4638 htab->elf.sgot->contents + h->got.offset);
351f65ca 4639 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
053579d7
AJ		 4640 rela.r_addend = 0;
4641 }
4642
351f65ca 4643 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
053579d7
AJ		 4644 }
4645
f5385ebf 4646 if (h->needs_copy)
70256ad8 4647 {
70256ad8
AJ		 4648 Elf_Internal_Rela rela;
4649
4650 /* This symbol needs a copy reloc. Set it up. */
4651
c434dee6
AJ		 4652 if (h->dynindx == -1
4653 || (h->root.type != bfd_link_hash_defined
4654 && h->root.type != bfd_link_hash_defweak)
4655 || htab->srelbss == NULL)
4656 abort ();
70256ad8
AJ		 4657
4658 rela.r_offset = (h->root.u.def.value
4659 + h->root.u.def.section->output_section->vma
4660 + h->root.u.def.section->output_offset);
351f65ca 4661 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
70256ad8 4662 rela.r_addend = 0;
351f65ca 4663 elf_append_rela (output_bfd, htab->srelbss, &rela);
70256ad8
AJ		 4664 }
4665
b34976b6 4666 return TRUE;
70256ad8
AJ		 4667}
4668
c25bc9fc
L		 4669/* Finish up local dynamic symbol handling. We set the contents of
4670 various dynamic sections here. */
4671
4672static bfd_boolean
351f65ca 4673elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
c25bc9fc
L		 4674{
4675 struct elf_link_hash_entry *h
4676 = (struct elf_link_hash_entry *) *slot;
4677 struct bfd_link_info *info
eed180f8 4678 = (struct bfd_link_info *) inf;
c25bc9fc 4679
351f65ca 4680 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
c25bc9fc
L		 4681 info, h, NULL);
4682}
4683
c434dee6
AJ		 4684/* Used to decide how to sort relocs in an optimal manner for the
4685 dynamic linker, before writing them out. */
4686
4687static enum elf_reloc_type_class
351f65ca 4688elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
c434dee6 4689{
351f65ca 4690 switch ((int) ELF32_R_TYPE (rela->r_info))
c434dee6
AJ		 4691 {
4692 case R_X86_64_RELATIVE:
1da80baa 4693 case R_X86_64_RELATIVE64:
c434dee6
AJ		 4694 return reloc_class_relative;
4695 case R_X86_64_JUMP_SLOT:
4696 return reloc_class_plt;
4697 case R_X86_64_COPY:
4698 return reloc_class_copy;
4699 default:
4700 return reloc_class_normal;
4701 }
4702}
4703
70256ad8
AJ		 4704/* Finish up the dynamic sections. */
4705
b34976b6 4706static bfd_boolean
351f65ca
L		 4707elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
4708 struct bfd_link_info *info)
70256ad8 4709{
351f65ca 4710 struct elf_x86_64_link_hash_table *htab;
70256ad8
AJ		 4711 bfd *dynobj;
4712 asection *sdyn;
eed180f8
RM		 4713 const struct elf_x86_64_backend_data *const abed
4714 = get_elf_x86_64_backend_data (output_bfd);
70256ad8 4715
351f65ca 4716 htab = elf_x86_64_hash_table (info);
4dfe6ac6
NC		 4717 if (htab == NULL)
4718 return FALSE;
4719
c434dee6 4720 dynobj = htab->elf.dynobj;
3d4d4302 4721 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
70256ad8 4722
c434dee6 4723 if (htab->elf.dynamic_sections_created)
70256ad8 4724 {
82e96e07
L		 4725 bfd_byte *dyncon, *dynconend;
4726 const struct elf_backend_data *bed;
4727 bfd_size_type sizeof_dyn;
70256ad8 4728
6de2ae4a 4729 if (sdyn == NULL || htab->elf.sgot == NULL)
c434dee6 4730 abort ();
70256ad8 4731
82e96e07
L		 4732 bed = get_elf_backend_data (dynobj);
4733 sizeof_dyn = bed->s->sizeof_dyn;
4734 dyncon = sdyn->contents;
4735 dynconend = sdyn->contents + sdyn->size;
4736 for (; dyncon < dynconend; dyncon += sizeof_dyn)
70256ad8
AJ		 4737 {
4738 Elf_Internal_Dyn dyn;
70256ad8
AJ		 4739 asection *s;
4740
82e96e07 4741 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
70256ad8
AJ		 4742
4743 switch (dyn.d_tag)
4744 {
4745 default:
053579d7 4746 continue;
70256ad8
AJ		 4747
4748 case DT_PLTGOT:
6de2ae4a 4749 s = htab->elf.sgotplt;
8c37241b 4750 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
c434dee6 4751 break;
70256ad8
AJ		 4752
4753 case DT_JMPREL:
6de2ae4a 4754 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
c434dee6 4755 break;
70256ad8 4756
c434dee6 4757 case DT_PLTRELSZ:
6de2ae4a 4758 s = htab->elf.srelplt->output_section;
eea6121a 4759 dyn.d_un.d_val = s->size;
70256ad8
AJ		 4760 break;
4761
4762 case DT_RELASZ:
c434dee6
AJ		 4763 /* The procedure linkage table relocs (DT_JMPREL) should
4764 not be included in the overall relocs (DT_RELA).
4765 Therefore, we override the DT_RELASZ entry here to
4766 make it not include the JMPREL relocs. Since the
4767 linker script arranges for .rela.plt to follow all
4768 other relocation sections, we don't have to worry
4769 about changing the DT_RELA entry. */
6de2ae4a 4770 if (htab->elf.srelplt != NULL)
70256ad8 4771 {
6de2ae4a 4772 s = htab->elf.srelplt->output_section;
eea6121a 4773 dyn.d_un.d_val -= s->size;
70256ad8
AJ		 4774 }
4775 break;
67a4f2b7
AO		 4776
4777 case DT_TLSDESC_PLT:
6de2ae4a 4778 s = htab->elf.splt;
67a4f2b7
AO		 4779 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4780 + htab->tlsdesc_plt;
4781 break;
4782
4783 case DT_TLSDESC_GOT:
6de2ae4a 4784 s = htab->elf.sgot;
67a4f2b7
AO		 4785 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4786 + htab->tlsdesc_got;
4787 break;
70256ad8 4788 }
c434dee6 4789
82e96e07 4790 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
70256ad8
AJ		 4791 }
4792
c434dee6 4793 /* Fill in the special first entry in the procedure linkage table. */
6de2ae4a 4794 if (htab->elf.splt && htab->elf.splt->size > 0)
70256ad8 4795 {
653165cc 4796 /* Fill in the first entry in the procedure linkage table. */
eed180f8
RM		 4797 memcpy (htab->elf.splt->contents,
4798 abed->plt0_entry, abed->plt_entry_size);
653165cc
AJ		 4799 /* Add offset for pushq GOT+8(%rip), since the instruction
4800 uses 6 bytes subtract this value. */
4801 bfd_put_32 (output_bfd,
6de2ae4a
L		 4802 (htab->elf.sgotplt->output_section->vma
4803 + htab->elf.sgotplt->output_offset
653165cc 4804 + 8
6de2ae4a
L		 4805 - htab->elf.splt->output_section->vma
4806 - htab->elf.splt->output_offset
653165cc 4807 - 6),
eed180f8
RM		 4808 htab->elf.splt->contents + abed->plt0_got1_offset);
4809 /* Add offset for the PC-relative instruction accessing GOT+16,
4810 subtracting the offset to the end of that instruction. */
653165cc 4811 bfd_put_32 (output_bfd,
6de2ae4a
L		 4812 (htab->elf.sgotplt->output_section->vma
4813 + htab->elf.sgotplt->output_offset
653165cc 4814 + 16
6de2ae4a
L		 4815 - htab->elf.splt->output_section->vma
4816 - htab->elf.splt->output_offset
eed180f8
RM		 4817 - abed->plt0_got2_insn_end),
4818 htab->elf.splt->contents + abed->plt0_got2_offset);
653165cc 4819
eed180f8
RM		 4820 elf_section_data (htab->elf.splt->output_section)
4821 ->this_hdr.sh_entsize = abed->plt_entry_size;
67a4f2b7
AO		 4822
4823 if (htab->tlsdesc_plt)
4824 {
4825 bfd_put_64 (output_bfd, (bfd_vma) 0,
6de2ae4a 4826 htab->elf.sgot->contents + htab->tlsdesc_got);
67a4f2b7 4827
6de2ae4a 4828 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
eed180f8 4829 abed->plt0_entry, abed->plt_entry_size);
67a4f2b7
AO		 4830
4831 /* Add offset for pushq GOT+8(%rip), since the
4832 instruction uses 6 bytes subtract this value. */
4833 bfd_put_32 (output_bfd,
6de2ae4a
L		 4834 (htab->elf.sgotplt->output_section->vma
4835 + htab->elf.sgotplt->output_offset
67a4f2b7 4836 + 8
6de2ae4a
L		 4837 - htab->elf.splt->output_section->vma
4838 - htab->elf.splt->output_offset
67a4f2b7
AO		 4839 - htab->tlsdesc_plt
4840 - 6),
eed180f8
RM		 4841 htab->elf.splt->contents
4842 + htab->tlsdesc_plt + abed->plt0_got1_offset);
4843 /* Add offset for the PC-relative instruction accessing GOT+TDG,
4844 where TGD stands for htab->tlsdesc_got, subtracting the offset
4845 to the end of that instruction. */
67a4f2b7 4846 bfd_put_32 (output_bfd,
6de2ae4a
L		 4847 (htab->elf.sgot->output_section->vma
4848 + htab->elf.sgot->output_offset
67a4f2b7 4849 + htab->tlsdesc_got
6de2ae4a
L		 4850 - htab->elf.splt->output_section->vma
4851 - htab->elf.splt->output_offset
67a4f2b7 4852 - htab->tlsdesc_plt
eed180f8
RM		 4853 - abed->plt0_got2_insn_end),
4854 htab->elf.splt->contents
4855 + htab->tlsdesc_plt + abed->plt0_got2_offset);
67a4f2b7 4856 }
70256ad8 4857 }
70256ad8
AJ		 4858 }
4859
6de2ae4a 4860 if (htab->elf.sgotplt)
70256ad8 4861 {
56d4289c
L		 4862 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4863 {
4864 (*_bfd_error_handler)
4865 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4866 return FALSE;
4867 }
4868
c434dee6 4869 /* Fill in the first three entries in the global offset table. */
6de2ae4a 4870 if (htab->elf.sgotplt->size > 0)
c434dee6
AJ		 4871 {
4872 /* Set the first entry in the global offset table to the address of
4873 the dynamic section. */
4874 if (sdyn == NULL)
6de2ae4a 4875 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
c434dee6
AJ		 4876 else
4877 bfd_put_64 (output_bfd,
4878 sdyn->output_section->vma + sdyn->output_offset,
6de2ae4a 4879 htab->elf.sgotplt->contents);
c434dee6 4880 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6de2ae4a
L		 4881 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
4882 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
c434dee6 4883 }
70256ad8 4884
6de2ae4a 4885 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
c434dee6
AJ		 4886 GOT_ENTRY_SIZE;
4887 }
70256ad8 4888
e41b3a13 4889 /* Adjust .eh_frame for .plt section. */
9a2a56cc
AM		 4890 if (htab->plt_eh_frame != NULL
4891 && htab->plt_eh_frame->contents != NULL)
e41b3a13
JJ		 4892 {
4893 if (htab->elf.splt != NULL
4894 && htab->elf.splt->size != 0
4895 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4896 && htab->elf.splt->output_section != NULL
4897 && htab->plt_eh_frame->output_section != NULL)
4898 {
4899 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4900 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4901 + htab->plt_eh_frame->output_offset
4902 + PLT_FDE_START_OFFSET;
4903 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4904 htab->plt_eh_frame->contents
4905 + PLT_FDE_START_OFFSET);
4906 }
dbaa2011 4907 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
e41b3a13
JJ		 4908 {
4909 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4910 htab->plt_eh_frame,
4911 htab->plt_eh_frame->contents))
4912 return FALSE;
4913 }
4914 }
4915
6de2ae4a
L		 4916 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4917 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
8c37241b
JJ		 4918 = GOT_ENTRY_SIZE;
4919
c25bc9fc
L		 4920 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4921 htab_traverse (htab->loc_hash_table,
351f65ca 4922 elf_x86_64_finish_local_dynamic_symbol,
c25bc9fc
L		 4923 info);
4924
b34976b6 4925 return TRUE;
8d88c4ca
NC		 4926}
4927
4c45e5c9
JJ		 4928/* Return address for Ith PLT stub in section PLT, for relocation REL
4929 or (bfd_vma) -1 if it should not be included. */
4930
4931static bfd_vma
351f65ca
L		 4932elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
4933 const arelent *rel ATTRIBUTE_UNUSED)
4c45e5c9 4934{
eed180f8 4935 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
4c45e5c9 4936}
8df9fc9d 4937
d2b2c203
DJ		 4938/* Handle an x86-64 specific section when reading an object file. This
4939 is called when elfcode.h finds a section with an unknown type. */
4940
4941static bfd_boolean
351f65ca 4942elf_x86_64_section_from_shdr (bfd *abfd,
6dc132d9
L		 4943 Elf_Internal_Shdr *hdr,
4944 const char *name,
4945 int shindex)
d2b2c203
DJ		 4946{
4947 if (hdr->sh_type != SHT_X86_64_UNWIND)
4948 return FALSE;
4949
6dc132d9 4950 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
d2b2c203
DJ		 4951 return FALSE;
4952
4953 return TRUE;
4954}
4955
3b22753a
L		 4956/* Hook called by the linker routine which adds symbols from an object
4957 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4958 of .bss. */
4959
4960static bfd_boolean
351f65ca
L		 4961elf_x86_64_add_symbol_hook (bfd *abfd,
4962 struct bfd_link_info *info,
4963 Elf_Internal_Sym *sym,
4964 const char **namep ATTRIBUTE_UNUSED,
4965 flagword *flagsp ATTRIBUTE_UNUSED,
4966 asection **secp,
4967 bfd_vma *valp)
3b22753a
L		 4968{
4969 asection *lcomm;
4970
4971 switch (sym->st_shndx)
4972 {
4973 case SHN_X86_64_LCOMMON:
4974 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
4975 if (lcomm == NULL)
4976 {
4977 lcomm = bfd_make_section_with_flags (abfd,
4978 "LARGE_COMMON",
4979 (SEC_ALLOC
4980 | SEC_IS_COMMON
4981 | SEC_LINKER_CREATED));
4982 if (lcomm == NULL)
4983 return FALSE;
4984 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
4985 }
4986 *secp = lcomm;
4987 *valp = sym->st_size;
c35bdf6e 4988 return TRUE;
3b22753a 4989 }
d8045f23 4990
c16153ae 4991 if ((abfd->flags & DYNAMIC) == 0
f64b2e8d
NC		 4992 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
4993 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
4994 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
d8045f23 4995
3b22753a
L		 4996 return TRUE;
4997}
4998
4999
5000/* Given a BFD section, try to locate the corresponding ELF section
5001 index. */
5002
5003static bfd_boolean
351f65ca
L		 5004elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
5005 asection *sec, int *index_return)
3b22753a
L		 5006{
5007 if (sec == &_bfd_elf_large_com_section)
5008 {
91d6fa6a 5009 *index_return = SHN_X86_64_LCOMMON;
3b22753a
L		 5010 return TRUE;
5011 }
5012 return FALSE;
5013}
5014
5015/* Process a symbol. */
5016
5017static void
351f65ca
L		 5018elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5019 asymbol *asym)
3b22753a
L		 5020{
5021 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5022
5023 switch (elfsym->internal_elf_sym.st_shndx)
5024 {
5025 case SHN_X86_64_LCOMMON:
5026 asym->section = &_bfd_elf_large_com_section;
5027 asym->value = elfsym->internal_elf_sym.st_size;
5028 /* Common symbol doesn't set BSF_GLOBAL. */
5029 asym->flags &= ~BSF_GLOBAL;
5030 break;
5031 }
5032}
5033
5034static bfd_boolean
351f65ca 5035elf_x86_64_common_definition (Elf_Internal_Sym *sym)
3b22753a
L		 5036{
5037 return (sym->st_shndx == SHN_COMMON
5038 || sym->st_shndx == SHN_X86_64_LCOMMON);
5039}
5040
5041static unsigned int
351f65ca 5042elf_x86_64_common_section_index (asection *sec)
3b22753a
L		 5043{
5044 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5045 return SHN_COMMON;
5046 else
5047 return SHN_X86_64_LCOMMON;
5048}
5049
5050static asection *
351f65ca 5051elf_x86_64_common_section (asection *sec)
3b22753a
L		 5052{
5053 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5054 return bfd_com_section_ptr;
5055 else
5056 return &_bfd_elf_large_com_section;
5057}
5058
5059static bfd_boolean
351f65ca
L		 5060elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
5061 struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED,
5062 struct elf_link_hash_entry *h,
5063 Elf_Internal_Sym *sym,
5064 asection **psec,
5065 bfd_vma *pvalue ATTRIBUTE_UNUSED,
5066 unsigned int *pold_alignment ATTRIBUTE_UNUSED,
5067 bfd_boolean *skip ATTRIBUTE_UNUSED,
5068 bfd_boolean *override ATTRIBUTE_UNUSED,
5069 bfd_boolean *type_change_ok ATTRIBUTE_UNUSED,
5070 bfd_boolean *size_change_ok ATTRIBUTE_UNUSED,
71e7aa7d
L		 5071 bfd_boolean *newdyn ATTRIBUTE_UNUSED,
5072 bfd_boolean *newdef,
351f65ca
L		 5073 bfd_boolean *newdyncommon ATTRIBUTE_UNUSED,
5074 bfd_boolean *newweak ATTRIBUTE_UNUSED,
5075 bfd *abfd ATTRIBUTE_UNUSED,
5076 asection **sec,
71e7aa7d
L		 5077 bfd_boolean *olddyn ATTRIBUTE_UNUSED,
5078 bfd_boolean *olddef,
351f65ca
L		 5079 bfd_boolean *olddyncommon ATTRIBUTE_UNUSED,
5080 bfd_boolean *oldweak ATTRIBUTE_UNUSED,
5081 bfd *oldbfd,
5082 asection **oldsec)
3b22753a
L		 5083{
5084 /* A normal common symbol and a large common symbol result in a
00492999
L		 5085 normal common symbol. We turn the large common symbol into a
5086 normal one. */
71e7aa7d 5087 if (!*olddef
3b22753a 5088 && h->root.type == bfd_link_hash_common
71e7aa7d 5089 && !*newdef
3b22753a 5090 && bfd_is_com_section (*sec)
00492999 5091 && *oldsec != *sec)
3b22753a 5092 {
00492999
L		 5093 if (sym->st_shndx == SHN_COMMON
5094 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0)
5095 {
5096 h->root.u.c.p->section
5097 = bfd_make_section_old_way (oldbfd, "COMMON");
5098 h->root.u.c.p->section->flags = SEC_ALLOC;
5099 }
5100 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5101 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0)
9a2e389a 5102 *psec = *sec = bfd_com_section_ptr;
3b22753a
L		 5103 }
5104
5105 return TRUE;
5106}
5107
5108static int
351f65ca
L		 5109elf_x86_64_additional_program_headers (bfd *abfd,
5110 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3b22753a
L		 5111{
5112 asection *s;
9a2e389a 5113 int count = 0;
3b22753a
L		 5114
5115 /* Check to see if we need a large readonly segment. */
5116 s = bfd_get_section_by_name (abfd, ".lrodata");
5117 if (s && (s->flags & SEC_LOAD))
5118 count++;
5119
5120 /* Check to see if we need a large data segment. Since .lbss sections
5121 is placed right after the .bss section, there should be no need for
5122 a large data segment just because of .lbss. */
5123 s = bfd_get_section_by_name (abfd, ".ldata");
5124 if (s && (s->flags & SEC_LOAD))
5125 count++;
5126
5127 return count;
5128}
5129
fdc90cb4
JJ		 5130/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5131
5132static bfd_boolean
351f65ca 5133elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
fdc90cb4
JJ		 5134{
5135 if (h->plt.offset != (bfd_vma) -1
5136 && !h->def_regular
5137 && !h->pointer_equality_needed)
5138 return FALSE;
5139
5140 return _bfd_elf_hash_symbol (h);
5141}
5142
c543bf9a
L		 5143/* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5144
5145static bfd_boolean
5146elf_x86_64_relocs_compatible (const bfd_target *input,
5147 const bfd_target *output)
5148{
5149 return ((xvec_get_elf_backend_data (input)->s->elfclass
5150 == xvec_get_elf_backend_data (output)->s->elfclass)
5151 && _bfd_elf_relocs_compatible (input, output));
5152}
5153
9a2e389a 5154static const struct bfd_elf_special_section
351f65ca 5155 elf_x86_64_special_sections[]=
3b22753a 5156{
0112cd26
NC		 5157 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5158 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5159 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
5160 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5161 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5162 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5163 { NULL, 0, 0, 0, 0 }
3b22753a
L		 5164};
5165
70256ad8
AJ		 5166#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
5167#define TARGET_LITTLE_NAME "elf64-x86-64"
5168#define ELF_ARCH bfd_arch_i386
ae95ffa6 5169#define ELF_TARGET_ID X86_64_ELF_DATA
70256ad8 5170#define ELF_MACHINE_CODE EM_X86_64
f7661549 5171#define ELF_MAXPAGESIZE 0x200000
2043964e 5172#define ELF_MINPAGESIZE 0x1000
24718e3b 5173#define ELF_COMMONPAGESIZE 0x1000
70256ad8
AJ		 5174
5175#define elf_backend_can_gc_sections 1
51b64d56 5176#define elf_backend_can_refcount 1
70256ad8
AJ		 5177#define elf_backend_want_got_plt 1
5178#define elf_backend_plt_readonly 1
5179#define elf_backend_want_plt_sym 0
5180#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 5181#define elf_backend_rela_normal 1
e41b3a13 5182#define elf_backend_plt_alignment 4
70256ad8 5183
351f65ca 5184#define elf_info_to_howto elf_x86_64_info_to_howto
70256ad8 5185
70256ad8 5186#define bfd_elf64_bfd_link_hash_table_create \
351f65ca 5187 elf_x86_64_link_hash_table_create
c25bc9fc 5188#define bfd_elf64_bfd_link_hash_table_free \
351f65ca
L		 5189 elf_x86_64_link_hash_table_free
5190#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
157090f7 5191#define bfd_elf64_bfd_reloc_name_lookup \
351f65ca 5192 elf_x86_64_reloc_name_lookup
70256ad8 5193
351f65ca 5194#define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
c543bf9a 5195#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
351f65ca
L		 5196#define elf_backend_check_relocs elf_x86_64_check_relocs
5197#define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5198#define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5199#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5200#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5201#define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5202#define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5203#define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5204#define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
8fd79e71
L		 5205#ifdef CORE_HEADER
5206#define elf_backend_write_core_note elf_x86_64_write_core_note
5207#endif
351f65ca
L		 5208#define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5209#define elf_backend_relocate_section elf_x86_64_relocate_section
5210#define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5211#define elf_backend_always_size_sections elf_x86_64_always_size_sections
74541ad4 5212#define elf_backend_init_index_section _bfd_elf_init_1_index_section
351f65ca 5213#define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
407443a3 5214#define elf_backend_object_p elf64_x86_64_elf_object_p
351f65ca 5215#define bfd_elf64_mkobject elf_x86_64_mkobject
8d88c4ca 5216
d2b2c203 5217#define elf_backend_section_from_shdr \
351f65ca 5218 elf_x86_64_section_from_shdr
d2b2c203 5219
3b22753a 5220#define elf_backend_section_from_bfd_section \
351f65ca 5221 elf_x86_64_elf_section_from_bfd_section
3b22753a 5222#define elf_backend_add_symbol_hook \
351f65ca 5223 elf_x86_64_add_symbol_hook
3b22753a 5224#define elf_backend_symbol_processing \
351f65ca 5225 elf_x86_64_symbol_processing
3b22753a 5226#define elf_backend_common_section_index \
351f65ca 5227 elf_x86_64_common_section_index
3b22753a 5228#define elf_backend_common_section \
351f65ca 5229 elf_x86_64_common_section
3b22753a 5230#define elf_backend_common_definition \
351f65ca 5231 elf_x86_64_common_definition
3b22753a 5232#define elf_backend_merge_symbol \
351f65ca 5233 elf_x86_64_merge_symbol
3b22753a 5234#define elf_backend_special_sections \
351f65ca 5235 elf_x86_64_special_sections
3b22753a 5236#define elf_backend_additional_program_headers \
351f65ca 5237 elf_x86_64_additional_program_headers
fdc90cb4 5238#define elf_backend_hash_symbol \
351f65ca 5239 elf_x86_64_hash_symbol
3b22753a 5240
d8045f23
NC		 5241#define elf_backend_post_process_headers _bfd_elf_set_osabi
5242
8d88c4ca 5243#include "elf64-target.h"
9d7cbccd
NC		 5244
5245/* FreeBSD support. */
5246
5247#undef TARGET_LITTLE_SYM
5248#define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
5249#undef TARGET_LITTLE_NAME
5250#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5251
d1036acb
L		 5252#undef ELF_OSABI
5253#define ELF_OSABI ELFOSABI_FREEBSD
9d7cbccd 5254
9d7cbccd
NC		 5255#undef elf64_bed
5256#define elf64_bed elf64_x86_64_fbsd_bed
5257
5258#include "elf64-target.h"
8a9036a4 5259
a6cc6b3b
RO		 5260/* Solaris 2 support. */
5261
5262#undef TARGET_LITTLE_SYM
5263#define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
5264#undef TARGET_LITTLE_NAME
5265#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5266
5267/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5268 objects won't be recognized. */
5269#undef ELF_OSABI
5270
5271#undef elf64_bed
5272#define elf64_bed elf64_x86_64_sol2_bed
5273
7dc98aea
RO		 5274/* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5275 boundary. */
5276#undef elf_backend_static_tls_alignment
5277#define elf_backend_static_tls_alignment 16
5278
a6cc6b3b
RO		 5279/* The Solaris 2 ABI requires a plt symbol on all platforms.
5280
5281 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5282 File, p.63. */
5283#undef elf_backend_want_plt_sym
5284#define elf_backend_want_plt_sym 1
5285
5286#include "elf64-target.h"
5287
8059fb19
RM		 5288/* Native Client support. */
5289
5290#undef TARGET_LITTLE_SYM
5291#define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
5292#undef TARGET_LITTLE_NAME
5293#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5294#undef elf64_bed
5295#define elf64_bed elf64_x86_64_nacl_bed
5296
5297#undef ELF_MAXPAGESIZE
5298#undef ELF_MINPAGESIZE
5299#undef ELF_COMMONPAGESIZE
5300#define ELF_MAXPAGESIZE 0x10000
5301#define ELF_MINPAGESIZE 0x10000
5302#define ELF_COMMONPAGESIZE 0x10000
5303
5304/* Restore defaults. */
5305#undef ELF_OSABI
5306#undef elf_backend_static_tls_alignment
5307#undef elf_backend_want_plt_sym
5308#define elf_backend_want_plt_sym 0
5309
5310/* NaCl uses substantially different PLT entries for the same effects. */
5311
5312#undef elf_backend_plt_alignment
5313#define elf_backend_plt_alignment 5
5314#define NACL_PLT_ENTRY_SIZE 64
5315#define NACLMASK 0xe0 /* 32-byte alignment mask. */
5316
5317static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
5318 {
5319 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5320 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5321 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5322 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5323 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5324
ea2d813e
RM		 5325 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5326 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */
5327
5328 /* 32 bytes of nop to pad out to the standard size. */
8059fb19
RM		 5329 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5330 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5331 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5332 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
ea2d813e
RM		 5333 0x66, /* excess data32 prefix */
5334 0x90 /* nop */
8059fb19
RM		 5335 };
5336
5337static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5338 {
5339 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5340 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5341 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5342 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5343
5344 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5345 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5346 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5347
5348 /* Lazy GOT entries point here (32-byte aligned). */
5349 0x68, /* pushq immediate */
5350 0, 0, 0, 0, /* replaced with index into relocation table. */
5351 0xe9, /* jmp relative */
5352 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5353
5354 /* 22 bytes of nop to pad out to the standard size. */
5355 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5356 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5357 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5358 };
5359
5360/* .eh_frame covering the .plt section. */
5361
5362static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
5363 {
5364#if (PLT_CIE_LENGTH != 20 \
5365 || PLT_FDE_LENGTH != 36 \
5366 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5367 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5368# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5369#endif
5370 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5371 0, 0, 0, 0, /* CIE ID */
5372 1, /* CIE version */
5373 'z', 'R', 0, /* Augmentation string */
5374 1, /* Code alignment factor */
5375 0x78, /* Data alignment factor */
5376 16, /* Return address column */
5377 1, /* Augmentation size */
5378 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5379 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5380 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5381 DW_CFA_nop, DW_CFA_nop,
5382
5383 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5384 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
5385 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5386 0, 0, 0, 0, /* .plt size goes here */
5387 0, /* Augmentation size */
5388 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
5389 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5390 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
5391 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5392 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5393 13, /* Block length */
5394 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
5395 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
5396 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5397 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
5398 DW_CFA_nop, DW_CFA_nop
5399 };
5400
5401static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
5402 {
5403 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
5404 elf_x86_64_nacl_plt_entry, /* plt_entry */
5405 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5406 2, /* plt0_got1_offset */
5407 9, /* plt0_got2_offset */
5408 13, /* plt0_got2_insn_end */
5409 3, /* plt_got_offset */
5410 33, /* plt_reloc_offset */
5411 38, /* plt_plt_offset */
5412 7, /* plt_got_insn_size */
5413 42, /* plt_plt_insn_end */
5414 32, /* plt_lazy_offset */
5415 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
5416 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
5417 };
5418
5419#undef elf_backend_arch_data
5420#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5421
5a68afcf
RM		 5422#undef elf_backend_modify_segment_map
5423#define elf_backend_modify_segment_map nacl_modify_segment_map
5424#undef elf_backend_modify_program_headers
5425#define elf_backend_modify_program_headers nacl_modify_program_headers
5426
8059fb19
RM		 5427#include "elf64-target.h"
5428
5429/* Native Client x32 support. */
5430
5431#undef TARGET_LITTLE_SYM
5432#define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
5433#undef TARGET_LITTLE_NAME
5434#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5435#undef elf32_bed
5436#define elf32_bed elf32_x86_64_nacl_bed
5437
5438#define bfd_elf32_bfd_link_hash_table_create \
5439 elf_x86_64_link_hash_table_create
5440#define bfd_elf32_bfd_link_hash_table_free \
5441 elf_x86_64_link_hash_table_free
5442#define bfd_elf32_bfd_reloc_type_lookup \
5443 elf_x86_64_reloc_type_lookup
5444#define bfd_elf32_bfd_reloc_name_lookup \
5445 elf_x86_64_reloc_name_lookup
5446#define bfd_elf32_mkobject \
5447 elf_x86_64_mkobject
5448
5449#undef elf_backend_object_p
5450#define elf_backend_object_p \
5451 elf32_x86_64_elf_object_p
5452
5453#undef elf_backend_bfd_from_remote_memory
5454#define elf_backend_bfd_from_remote_memory \
5455 _bfd_elf32_bfd_from_remote_memory
5456
5457#undef elf_backend_size_info
5458#define elf_backend_size_info \
5459 _bfd_elf32_size_info
5460
5461#include "elf32-target.h"
5462
5463/* Restore defaults. */
5a68afcf 5464#undef elf_backend_object_p
8059fb19 5465#define elf_backend_object_p elf64_x86_64_elf_object_p
5a68afcf
RM		 5466#undef elf_backend_bfd_from_remote_memory
5467#undef elf_backend_size_info
5468#undef elf_backend_modify_segment_map
5469#undef elf_backend_modify_program_headers
8059fb19 5470
8a9036a4
L		 5471/* Intel L1OM support. */
5472
5473static bfd_boolean
5474elf64_l1om_elf_object_p (bfd *abfd)
5475{
5476 /* Set the right machine number for an L1OM elf64 file. */
5477 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5478 return TRUE;
5479}
5480
5481#undef TARGET_LITTLE_SYM
5482#define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5483#undef TARGET_LITTLE_NAME
5484#define TARGET_LITTLE_NAME "elf64-l1om"
5485#undef ELF_ARCH
5486#define ELF_ARCH bfd_arch_l1om
5487
5488#undef ELF_MACHINE_CODE
5489#define ELF_MACHINE_CODE EM_L1OM
5490
5491#undef ELF_OSABI
5492
5493#undef elf64_bed
5494#define elf64_bed elf64_l1om_bed
5495
5496#undef elf_backend_object_p
5497#define elf_backend_object_p elf64_l1om_elf_object_p
5498
8059fb19
RM		 5499/* Restore defaults. */
5500#undef ELF_MAXPAGESIZE
5501#undef ELF_MINPAGESIZE
5502#undef ELF_COMMONPAGESIZE
5503#define ELF_MAXPAGESIZE 0x200000
5504#define ELF_MINPAGESIZE 0x1000
5505#define ELF_COMMONPAGESIZE 0x1000
5506#undef elf_backend_plt_alignment
5507#define elf_backend_plt_alignment 4
5508#undef elf_backend_arch_data
5509#define elf_backend_arch_data &elf_x86_64_arch_bed
1a0c107f 5510
8a9036a4
L		 5511#include "elf64-target.h"
5512
5513/* FreeBSD L1OM support. */
5514
5515#undef TARGET_LITTLE_SYM
5516#define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5517#undef TARGET_LITTLE_NAME
5518#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5519
5520#undef ELF_OSABI
5521#define ELF_OSABI ELFOSABI_FREEBSD
5522
5523#undef elf64_bed
5524#define elf64_bed elf64_l1om_fbsd_bed
5525
8a9036a4 5526#include "elf64-target.h"
351f65ca 5527
7a9068fe
L		 5528/* Intel K1OM support. */
5529
5530static bfd_boolean
5531elf64_k1om_elf_object_p (bfd *abfd)
5532{
5533 /* Set the right machine number for an K1OM elf64 file. */
5534 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
5535 return TRUE;
5536}
5537
5538#undef TARGET_LITTLE_SYM
5539#define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
5540#undef TARGET_LITTLE_NAME
5541#define TARGET_LITTLE_NAME "elf64-k1om"
5542#undef ELF_ARCH
5543#define ELF_ARCH bfd_arch_k1om
5544
5545#undef ELF_MACHINE_CODE
5546#define ELF_MACHINE_CODE EM_K1OM
5547
5548#undef ELF_OSABI
5549
5550#undef elf64_bed
5551#define elf64_bed elf64_k1om_bed
5552
5553#undef elf_backend_object_p
5554#define elf_backend_object_p elf64_k1om_elf_object_p
5555
5556#undef elf_backend_static_tls_alignment
5557
5558#undef elf_backend_want_plt_sym
5559#define elf_backend_want_plt_sym 0
5560
5561#include "elf64-target.h"
5562
5563/* FreeBSD K1OM support. */
5564
5565#undef TARGET_LITTLE_SYM
5566#define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
5567#undef TARGET_LITTLE_NAME
5568#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5569
5570#undef ELF_OSABI
5571#define ELF_OSABI ELFOSABI_FREEBSD
5572
5573#undef elf64_bed
5574#define elf64_bed elf64_k1om_fbsd_bed
5575
5576#include "elf64-target.h"
5577
351f65ca
L		 5578/* 32bit x86-64 support. */
5579
351f65ca
L		 5580#undef TARGET_LITTLE_SYM
5581#define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5582#undef TARGET_LITTLE_NAME
5583#define TARGET_LITTLE_NAME "elf32-x86-64"
8059fb19 5584#undef elf32_bed
351f65ca
L		 5585
5586#undef ELF_ARCH
5587#define ELF_ARCH bfd_arch_i386
5588
5589#undef ELF_MACHINE_CODE
5590#define ELF_MACHINE_CODE EM_X86_64
5591
351f65ca
L		 5592#undef ELF_OSABI
5593
351f65ca
L		 5594#undef elf_backend_object_p
5595#define elf_backend_object_p \
5596 elf32_x86_64_elf_object_p
5597
5598#undef elf_backend_bfd_from_remote_memory
5599#define elf_backend_bfd_from_remote_memory \
5600 _bfd_elf32_bfd_from_remote_memory
5601
5602#undef elf_backend_size_info
5603#define elf_backend_size_info \
5604 _bfd_elf32_size_info
5605
5606#include "elf32-target.h"
GDB Binutils - Deliverables
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