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* simple.c (bfd_simple_get_relocated_section_contents): Don't
[binutils.git] / bfd / elf64-x86-64.c
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8d88c4ca 1/* X86-64 specific support for 64-bit ELF
b2a8e766 2 Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
8d88c4ca
NC		 3 Contributed by Jan Hubicka <[email protected]>.
4
ae9a127f 5 This file is part of BFD, the Binary File Descriptor library.
8d88c4ca 6
ae9a127f
NC		 7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
8d88c4ca 11
ae9a127f
NC		 12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
8d88c4ca 16
ae9a127f
NC		 17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
8d88c4ca
NC		 20
21#include "bfd.h"
22#include "sysdep.h"
c434dee6 23#include "bfdlink.h"
8d88c4ca
NC		 24#include "libbfd.h"
25#include "elf-bfd.h"
26
27#include "elf/x86-64.h"
28
8d88c4ca
NC		 29/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
30#define MINUS_ONE (~ (bfd_vma) 0)
31
32/* The relocation "howto" table. Order of fields:
407443a3
AJ		 33 type, size, bitsize, pc_relative, complain_on_overflow,
34 special_function, name, partial_inplace, src_mask, dst_pack, pcrel_offset. */
70256ad8
AJ		 35static reloc_howto_type x86_64_elf_howto_table[] =
36{
b34976b6
AM		 37 HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont,
38 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
39 FALSE),
40 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
41 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
42 FALSE),
43 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
44 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
45 TRUE),
46 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
47 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
48 FALSE),
49 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
50 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
51 TRUE),
52 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
54 FALSE),
55 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
57 MINUS_ONE, FALSE),
58 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
60 MINUS_ONE, FALSE),
61 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
63 MINUS_ONE, FALSE),
64 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
65 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
66 0xffffffff, TRUE),
67 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
68 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
69 FALSE),
70 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
71 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
72 FALSE),
73 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
75 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
77 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_signed,
78 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
79 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
80 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
81 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
83 MINUS_ONE, FALSE),
84 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
86 MINUS_ONE, FALSE),
87 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
89 MINUS_ONE, FALSE),
90 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
91 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
92 0xffffffff, TRUE),
93 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
94 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
95 0xffffffff, TRUE),
96 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
98 0xffffffff, FALSE),
99 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
100 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
101 0xffffffff, TRUE),
102 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
103 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
104 0xffffffff, FALSE),
fe4770f4
AJ		 105
106/* GNU extension to record C++ vtable hierarchy. */
b34976b6
AM		 107 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
108 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
fe4770f4
AJ		 109
110/* GNU extension to record C++ vtable member usage. */
b34976b6
AM		 111 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
112 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
113 FALSE)
8d88c4ca
NC		 114};
115
116/* Map BFD relocs to the x86_64 elf relocs. */
70256ad8
AJ		 117struct elf_reloc_map
118{
8d88c4ca
NC		 119 bfd_reloc_code_real_type bfd_reloc_val;
120 unsigned char elf_reloc_val;
121};
122
dc810e39 123static const struct elf_reloc_map x86_64_reloc_map[] =
8d88c4ca 124{
70256ad8
AJ		 125 { BFD_RELOC_NONE, R_X86_64_NONE, },
126 { BFD_RELOC_64, R_X86_64_64, },
127 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
128 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
129 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
130 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
131 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
132 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
133 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
134 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
135 { BFD_RELOC_32, R_X86_64_32, },
136 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
137 { BFD_RELOC_16, R_X86_64_16, },
138 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
139 { BFD_RELOC_8, R_X86_64_8, },
140 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
bffbf940
JJ		 141 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
142 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
143 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
144 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
145 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
146 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
147 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
148 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
fe4770f4
AJ		 149 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
150 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
8d88c4ca
NC		 151};
152
8d88c4ca
NC		 153
154/* Given a BFD reloc type, return a HOWTO structure. */
155static reloc_howto_type *
27482721
AJ		 156elf64_x86_64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
157 bfd_reloc_code_real_type code)
8d88c4ca
NC		 158{
159 unsigned int i;
27482721 160
8d88c4ca
NC		 161 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
162 i++)
163 {
164 if (x86_64_reloc_map[i].bfd_reloc_val == code)
ffaef159 165 return &x86_64_elf_howto_table[i];
8d88c4ca
NC		 166 }
167 return 0;
168}
169
8d88c4ca 170/* Given an x86_64 ELF reloc type, fill in an arelent structure. */
8da6118f 171
8d88c4ca 172static void
27482721
AJ		 173elf64_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
174 Elf_Internal_Rela *dst)
8d88c4ca 175{
fe4770f4 176 unsigned r_type, i;
8d88c4ca
NC		 177
178 r_type = ELF64_R_TYPE (dst->r_info);
fe4770f4
AJ		 179 if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT)
180 {
bffbf940 181 BFD_ASSERT (r_type <= (unsigned int) R_X86_64_TPOFF32);
fe4770f4
AJ		 182 i = r_type;
183 }
184 else
185 {
186 BFD_ASSERT (r_type < (unsigned int) R_X86_64_max);
bffbf940 187 i = r_type - ((unsigned int) R_X86_64_GNU_VTINHERIT - R_X86_64_TPOFF32 - 1);
fe4770f4
AJ		 188 }
189 cache_ptr->howto = &x86_64_elf_howto_table[i];
8d88c4ca
NC		 190 BFD_ASSERT (r_type == cache_ptr->howto->type);
191}
70256ad8 192\f
3bab7989 193/* Support for core dump NOTE sections. */
b34976b6 194static bfd_boolean
27482721 195elf64_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 196{
197 int offset;
198 size_t raw_size;
199
200 switch (note->descsz)
201 {
202 default:
b34976b6 203 return FALSE;
3bab7989
ML		 204
205 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
206 /* pr_cursig */
cedb70c5 207 elf_tdata (abfd)->core_signal
3bab7989
ML		 208 = bfd_get_16 (abfd, note->descdata + 12);
209
210 /* pr_pid */
cedb70c5 211 elf_tdata (abfd)->core_pid
3bab7989
ML		 212 = bfd_get_32 (abfd, note->descdata + 32);
213
214 /* pr_reg */
215 offset = 112;
216 raw_size = 216;
217
218 break;
219 }
220
221 /* Make a ".reg/999" section. */
222 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
223 raw_size, note->descpos + offset);
224}
225
b34976b6 226static bfd_boolean
27482721 227elf64_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3bab7989
ML		 228{
229 switch (note->descsz)
230 {
231 default:
b34976b6 232 return FALSE;
3bab7989
ML		 233
234 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
235 elf_tdata (abfd)->core_program
236 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
237 elf_tdata (abfd)->core_command
238 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
239 }
240
241 /* Note that for some reason, a spurious space is tacked
242 onto the end of the args in some (at least one anyway)
243 implementations, so strip it off if it exists. */
244
245 {
246 char *command = elf_tdata (abfd)->core_command;
247 int n = strlen (command);
248
249 if (0 < n && command[n - 1] == ' ')
250 command[n - 1] = '\0';
251 }
252
b34976b6 253 return TRUE;
3bab7989
ML		 254}
255\f
407443a3 256/* Functions for the x86-64 ELF linker. */
70256ad8 257
407443a3 258/* The name of the dynamic interpreter. This is put in the .interp
70256ad8
AJ		 259 section. */
260
407443a3 261#define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
70256ad8 262
d40d037c
AJ		 263/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
264 copying dynamic variables from a shared lib into an app's dynbss
265 section, and instead use a dynamic relocation to point into the
266 shared lib. */
267#define ELIMINATE_COPY_RELOCS 1
268
70256ad8
AJ		 269/* The size in bytes of an entry in the global offset table. */
270
271#define GOT_ENTRY_SIZE 8
8d88c4ca 272
70256ad8 273/* The size in bytes of an entry in the procedure linkage table. */
8d88c4ca 274
70256ad8
AJ		 275#define PLT_ENTRY_SIZE 16
276
277/* The first entry in a procedure linkage table looks like this. See the
278 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
279
280static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
281{
653165cc
AJ		 282 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
283 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
284 0x90, 0x90, 0x90, 0x90 /* pad out to 16 bytes with nops. */
70256ad8
AJ		 285};
286
287/* Subsequent entries in a procedure linkage table look like this. */
288
289static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] =
290{
653165cc 291 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
407443a3 292 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653165cc 293 0x68, /* pushq immediate */
70256ad8
AJ		 294 0, 0, 0, 0, /* replaced with index into relocation table. */
295 0xe9, /* jmp relative */
296 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
297};
298
299/* The x86-64 linker needs to keep track of the number of relocs that
985142a4 300 it decides to copy as dynamic relocs in check_relocs for each symbol.
c434dee6
AJ		 301 This is so that it can later discard them if they are found to be
302 unnecessary. We store the information in a field extending the
303 regular ELF linker hash table. */
70256ad8 304
c434dee6 305struct elf64_x86_64_dyn_relocs
70256ad8
AJ		 306{
307 /* Next section. */
c434dee6
AJ		 308 struct elf64_x86_64_dyn_relocs *next;
309
310 /* The input section of the reloc. */
311 asection *sec;
312
313 /* Total number of relocs copied for the input section. */
70256ad8 314 bfd_size_type count;
c434dee6
AJ		 315
316 /* Number of pc-relative relocs copied for the input section. */
317 bfd_size_type pc_count;
70256ad8
AJ		 318};
319
320/* x86-64 ELF linker hash entry. */
321
322struct elf64_x86_64_link_hash_entry
323{
c434dee6 324 struct elf_link_hash_entry elf;
70256ad8 325
c434dee6
AJ		 326 /* Track dynamic relocs copied for this symbol. */
327 struct elf64_x86_64_dyn_relocs *dyn_relocs;
bffbf940
JJ		 328
329#define GOT_UNKNOWN 0
330#define GOT_NORMAL 1
331#define GOT_TLS_GD 2
332#define GOT_TLS_IE 3
333 unsigned char tls_type;
334};
335
336#define elf64_x86_64_hash_entry(ent) \
337 ((struct elf64_x86_64_link_hash_entry *)(ent))
338
339struct elf64_x86_64_obj_tdata
340{
341 struct elf_obj_tdata root;
342
343 /* tls_type for each local got entry. */
344 char *local_got_tls_type;
70256ad8
AJ		 345};
346
bffbf940
JJ		 347#define elf64_x86_64_tdata(abfd) \
348 ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any)
349
350#define elf64_x86_64_local_got_tls_type(abfd) \
351 (elf64_x86_64_tdata (abfd)->local_got_tls_type)
352
353
c434dee6 354/* x86-64 ELF linker hash table. */
8d88c4ca 355
407443a3
AJ		 356struct elf64_x86_64_link_hash_table
357{
c434dee6 358 struct elf_link_hash_table elf;
70256ad8 359
c434dee6
AJ		 360 /* Short-cuts to get to dynamic linker sections. */
361 asection *sgot;
362 asection *sgotplt;
363 asection *srelgot;
364 asection *splt;
365 asection *srelplt;
366 asection *sdynbss;
367 asection *srelbss;
70256ad8 368
bffbf940
JJ		 369 union {
370 bfd_signed_vma refcount;
371 bfd_vma offset;
372 } tls_ld_got;
373
c434dee6
AJ		 374 /* Small local sym to section mapping cache. */
375 struct sym_sec_cache sym_sec;
376};
70256ad8
AJ		 377
378/* Get the x86-64 ELF linker hash table from a link_info structure. */
8d88c4ca
NC		 379
380#define elf64_x86_64_hash_table(p) \
381 ((struct elf64_x86_64_link_hash_table *) ((p)->hash))
382
407443a3 383/* Create an entry in an x86-64 ELF linker hash table. */
70256ad8
AJ		 384
385static struct bfd_hash_entry *
27482721
AJ		 386link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table,
387 const char *string)
70256ad8 388{
70256ad8 389 /* Allocate the structure if it has not already been allocated by a
c434dee6
AJ		 390 subclass. */
391 if (entry == NULL)
392 {
393 entry = bfd_hash_allocate (table,
394 sizeof (struct elf64_x86_64_link_hash_entry));
395 if (entry == NULL)
396 return entry;
397 }
70256ad8
AJ		 398
399 /* Call the allocation method of the superclass. */
c434dee6
AJ		 400 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
401 if (entry != NULL)
70256ad8 402 {
c434dee6
AJ		 403 struct elf64_x86_64_link_hash_entry *eh;
404
405 eh = (struct elf64_x86_64_link_hash_entry *) entry;
406 eh->dyn_relocs = NULL;
bffbf940 407 eh->tls_type = GOT_UNKNOWN;
70256ad8
AJ		 408 }
409
c434dee6 410 return entry;
70256ad8
AJ		 411}
412
8d88c4ca
NC		 413/* Create an X86-64 ELF linker hash table. */
414
415static struct bfd_link_hash_table *
27482721 416elf64_x86_64_link_hash_table_create (bfd *abfd)
8d88c4ca
NC		 417{
418 struct elf64_x86_64_link_hash_table *ret;
dc810e39 419 bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table);
8d88c4ca 420
e2d34d7d 421 ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt);
c434dee6 422 if (ret == NULL)
8d88c4ca
NC		 423 return NULL;
424
c434dee6 425 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
8d88c4ca 426 {
e2d34d7d 427 free (ret);
8d88c4ca
NC		 428 return NULL;
429 }
430
c434dee6
AJ		 431 ret->sgot = NULL;
432 ret->sgotplt = NULL;
433 ret->srelgot = NULL;
434 ret->splt = NULL;
435 ret->srelplt = NULL;
436 ret->sdynbss = NULL;
437 ret->srelbss = NULL;
438 ret->sym_sec.abfd = NULL;
bffbf940 439 ret->tls_ld_got.refcount = 0;
c434dee6
AJ		 440
441 return &ret->elf.root;
442}
443
444/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
445 shortcuts to them in our hash table. */
446
b34976b6 447static bfd_boolean
27482721 448create_got_section (bfd *dynobj, struct bfd_link_info *info)
c434dee6
AJ		 449{
450 struct elf64_x86_64_link_hash_table *htab;
451
452 if (! _bfd_elf_create_got_section (dynobj, info))
b34976b6 453 return FALSE;
c434dee6
AJ		 454
455 htab = elf64_x86_64_hash_table (info);
456 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
457 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
458 if (!htab->sgot || !htab->sgotplt)
459 abort ();
460
461 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
462 if (htab->srelgot == NULL
463 || ! bfd_set_section_flags (dynobj, htab->srelgot,
464 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
465 | SEC_IN_MEMORY | SEC_LINKER_CREATED
466 | SEC_READONLY))
467 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
b34976b6
AM		 468 return FALSE;
469 return TRUE;
c434dee6
AJ		 470}
471
472/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
473 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
474 hash table. */
475
b34976b6 476static bfd_boolean
27482721 477elf64_x86_64_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
c434dee6
AJ		 478{
479 struct elf64_x86_64_link_hash_table *htab;
480
481 htab = elf64_x86_64_hash_table (info);
482 if (!htab->sgot && !create_got_section (dynobj, info))
b34976b6 483 return FALSE;
c434dee6
AJ		 484
485 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 486 return FALSE;
c434dee6
AJ		 487
488 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
489 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
490 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
491 if (!info->shared)
492 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
493
494 if (!htab->splt || !htab->srelplt || !htab->sdynbss
495 || (!info->shared && !htab->srelbss))
496 abort ();
497
b34976b6 498 return TRUE;
c434dee6
AJ		 499}
500
501/* Copy the extra info we tack onto an elf_link_hash_entry. */
502
503static void
9c5bfbb7 504elf64_x86_64_copy_indirect_symbol (const struct elf_backend_data *bed,
27482721
AJ		 505 struct elf_link_hash_entry *dir,
506 struct elf_link_hash_entry *ind)
c434dee6
AJ		 507{
508 struct elf64_x86_64_link_hash_entry *edir, *eind;
509
510 edir = (struct elf64_x86_64_link_hash_entry *) dir;
511 eind = (struct elf64_x86_64_link_hash_entry *) ind;
512
513 if (eind->dyn_relocs != NULL)
514 {
515 if (edir->dyn_relocs != NULL)
516 {
517 struct elf64_x86_64_dyn_relocs **pp;
518 struct elf64_x86_64_dyn_relocs *p;
519
520 if (ind->root.type == bfd_link_hash_indirect)
521 abort ();
522
523 /* Add reloc counts against the weak sym to the strong sym
524 list. Merge any entries against the same section. */
525 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
526 {
527 struct elf64_x86_64_dyn_relocs *q;
528
529 for (q = edir->dyn_relocs; q != NULL; q = q->next)
530 if (q->sec == p->sec)
531 {
532 q->pc_count += p->pc_count;
533 q->count += p->count;
534 *pp = p->next;
535 break;
536 }
537 if (q == NULL)
538 pp = &p->next;
539 }
540 *pp = edir->dyn_relocs;
541 }
542
543 edir->dyn_relocs = eind->dyn_relocs;
544 eind->dyn_relocs = NULL;
545 }
546
bffbf940
JJ		 547 if (ind->root.type == bfd_link_hash_indirect
548 && dir->got.refcount <= 0)
549 {
550 edir->tls_type = eind->tls_type;
551 eind->tls_type = GOT_UNKNOWN;
552 }
553
d40d037c
AJ		 554 if (ELIMINATE_COPY_RELOCS
555 && ind->root.type != bfd_link_hash_indirect
556 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
557 /* If called to transfer flags for a weakdef during processing
558 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
559 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
560 dir->elf_link_hash_flags |=
561 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
562 | ELF_LINK_HASH_REF_REGULAR
3addb0a9
DJ		 563 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
564 | ELF_LINK_HASH_NEEDS_PLT));
d40d037c
AJ		 565 else
566 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
8d88c4ca
NC		 567}
568
b34976b6 569static bfd_boolean
27482721 570elf64_x86_64_mkobject (bfd *abfd)
8d88c4ca 571{
bffbf940
JJ		 572 bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata);
573 abfd->tdata.any = bfd_zalloc (abfd, amt);
574 if (abfd->tdata.any == NULL)
b34976b6
AM		 575 return FALSE;
576 return TRUE;
bffbf940
JJ		 577}
578
b34976b6 579static bfd_boolean
27482721 580elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940 581{
8d88c4ca
NC		 582 /* Set the right machine number for an x86-64 elf64 file. */
583 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 584 return TRUE;
8d88c4ca
NC		 585}
586
bffbf940 587static int
27482721 588elf64_x86_64_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
bffbf940
JJ		 589{
590 if (info->shared)
591 return r_type;
592
593 switch (r_type)
594 {
595 case R_X86_64_TLSGD:
596 case R_X86_64_GOTTPOFF:
597 if (is_local)
598 return R_X86_64_TPOFF32;
599 return R_X86_64_GOTTPOFF;
600 case R_X86_64_TLSLD:
601 return R_X86_64_TPOFF32;
602 }
603
604 return r_type;
605}
606
70256ad8 607/* Look through the relocs for a section during the first phase, and
c434dee6
AJ		 608 calculate needed space in the global offset table, procedure
609 linkage table, and dynamic reloc sections. */
70256ad8 610
b34976b6 611static bfd_boolean
27482721
AJ		 612elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
613 const Elf_Internal_Rela *relocs)
70256ad8 614{
c434dee6 615 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 616 Elf_Internal_Shdr *symtab_hdr;
617 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ		 618 const Elf_Internal_Rela *rel;
619 const Elf_Internal_Rela *rel_end;
70256ad8
AJ		 620 asection *sreloc;
621
1049f94e 622 if (info->relocatable)
b34976b6 623 return TRUE;
70256ad8 624
c434dee6 625 htab = elf64_x86_64_hash_table (info);
70256ad8
AJ		 626 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
627 sym_hashes = elf_sym_hashes (abfd);
70256ad8 628
c434dee6
AJ		 629 sreloc = NULL;
630
70256ad8
AJ		 631 rel_end = relocs + sec->reloc_count;
632 for (rel = relocs; rel < rel_end; rel++)
633 {
bffbf940 634 unsigned int r_type;
70256ad8
AJ		 635 unsigned long r_symndx;
636 struct elf_link_hash_entry *h;
637
638 r_symndx = ELF64_R_SYM (rel->r_info);
bffbf940 639 r_type = ELF64_R_TYPE (rel->r_info);
c434dee6
AJ		 640
641 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
642 {
643 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
644 bfd_archive_filename (abfd),
645 r_symndx);
b34976b6 646 return FALSE;
c434dee6
AJ		 647 }
648
70256ad8
AJ		 649 if (r_symndx < symtab_hdr->sh_info)
650 h = NULL;
651 else
652 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
653
bffbf940
JJ		 654 r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL);
655 switch (r_type)
70256ad8 656 {
bffbf940
JJ		 657 case R_X86_64_TLSLD:
658 htab->tls_ld_got.refcount += 1;
659 goto create_got;
660
661 case R_X86_64_TPOFF32:
662 if (info->shared)
70256ad8 663 {
bffbf940
JJ		 664 (*_bfd_error_handler)
665 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
666 bfd_archive_filename (abfd),
667 x86_64_elf_howto_table[r_type].name);
668 bfd_set_error (bfd_error_bad_value);
b34976b6 669 return FALSE;
70256ad8 670 }
bffbf940 671 break;
c434dee6 672
bffbf940
JJ		 673 case R_X86_64_GOTTPOFF:
674 if (info->shared)
675 info->flags |= DF_STATIC_TLS;
676 /* Fall through */
70256ad8 677
bffbf940
JJ		 678 case R_X86_64_GOT32:
679 case R_X86_64_GOTPCREL:
680 case R_X86_64_TLSGD:
681 /* This symbol requires a global offset table entry. */
682 {
683 int tls_type, old_tls_type;
684
685 switch (r_type)
686 {
687 default: tls_type = GOT_NORMAL; break;
688 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
689 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
690 }
691
692 if (h != NULL)
693 {
694 h->got.refcount += 1;
695 old_tls_type = elf64_x86_64_hash_entry (h)->tls_type;
696 }
697 else
698 {
699 bfd_signed_vma *local_got_refcounts;
700
701 /* This is a global offset table entry for a local symbol. */
702 local_got_refcounts = elf_local_got_refcounts (abfd);
703 if (local_got_refcounts == NULL)
704 {
705 bfd_size_type size;
706
707 size = symtab_hdr->sh_info;
708 size *= sizeof (bfd_signed_vma) + sizeof (char);
709 local_got_refcounts = ((bfd_signed_vma *)
710 bfd_zalloc (abfd, size));
711 if (local_got_refcounts == NULL)
b34976b6 712 return FALSE;
bffbf940
JJ		 713 elf_local_got_refcounts (abfd) = local_got_refcounts;
714 elf64_x86_64_local_got_tls_type (abfd)
715 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
716 }
717 local_got_refcounts[r_symndx] += 1;
718 old_tls_type
719 = elf64_x86_64_local_got_tls_type (abfd) [r_symndx];
720 }
721
722 /* If a TLS symbol is accessed using IE at least once,
723 there is no point to use dynamic model for it. */
724 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
725 && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE))
726 {
727 if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD)
728 tls_type = old_tls_type;
729 else
730 {
731 (*_bfd_error_handler)
732 (_("%s: %s' accessed both as normal and thread local symbol"),
733 bfd_archive_filename (abfd),
734 h ? h->root.root.string : "<local>");
b34976b6 735 return FALSE;
bffbf940
JJ		 736 }
737 }
738
739 if (old_tls_type != tls_type)
740 {
741 if (h != NULL)
742 elf64_x86_64_hash_entry (h)->tls_type = tls_type;
743 else
744 elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
745 }
746 }
c434dee6
AJ		 747 /* Fall through */
748
749 //case R_X86_64_GOTPCREL:
bffbf940 750 create_got:
c434dee6
AJ		 751 if (htab->sgot == NULL)
752 {
753 if (htab->elf.dynobj == NULL)
754 htab->elf.dynobj = abfd;
755 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 756 return FALSE;
c434dee6 757 }
70256ad8
AJ		 758 break;
759
760 case R_X86_64_PLT32:
761 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ		 762 actually build the entry in adjust_dynamic_symbol,
763 because this might be a case of linking PIC code which is
764 never referenced by a dynamic object, in which case we
765 don't need to generate a procedure linkage table entry
766 after all. */
70256ad8
AJ		 767
768 /* If this is a local symbol, we resolve it directly without
407443a3 769 creating a procedure linkage table entry. */
70256ad8
AJ		 770 if (h == NULL)
771 continue;
772
cc78d0af 773 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
51b64d56 774 h->plt.refcount += 1;
70256ad8
AJ		 775 break;
776
cc78d0af
AJ		 777 case R_X86_64_8:
778 case R_X86_64_16:
70256ad8
AJ		 779 case R_X86_64_32:
780 case R_X86_64_32S:
1b71fb54
AJ		 781 /* Let's help debug shared library creation. These relocs
782 cannot be used in shared libs. Don't error out for
783 sections we don't care about, such as debug sections or
784 non-constant sections. */
785 if (info->shared
786 && (sec->flags & SEC_ALLOC) != 0
787 && (sec->flags & SEC_READONLY) != 0)
788 {
789 (*_bfd_error_handler)
790 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
791 bfd_archive_filename (abfd),
bffbf940 792 x86_64_elf_howto_table[r_type].name);
1b71fb54 793 bfd_set_error (bfd_error_bad_value);
b34976b6 794 return FALSE;
1b71fb54
AJ		 795 }
796 /* Fall through. */
797
c434dee6
AJ		 798 case R_X86_64_PC8:
799 case R_X86_64_PC16:
70256ad8 800 case R_X86_64_PC32:
1b71fb54 801 case R_X86_64_64:
c434dee6
AJ		 802 if (h != NULL && !info->shared)
803 {
804 /* If this reloc is in a read-only section, we might
805 need a copy reloc. We can't check reliably at this
806 stage whether the section is read-only, as input
807 sections have not yet been mapped to output sections.
808 Tentatively set the flag for now, and correct in
809 adjust_dynamic_symbol. */
810 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
811
812 /* We may need a .plt entry if the function this reloc
813 refers to is in a shared lib. */
814 h->plt.refcount += 1;
815 }
70256ad8
AJ		 816
817 /* If we are creating a shared library, and this is a reloc
818 against a global symbol, or a non PC relative reloc
819 against a local symbol, then we need to copy the reloc
820 into the shared library. However, if we are linking with
821 -Bsymbolic, we do not need to copy a reloc against a
822 global symbol which is defined in an object we are
407443a3 823 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ		 824 this point we have not seen all the input files, so it is
825 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ		 826 later (it is never cleared). In case of a weak definition,
827 DEF_REGULAR may be cleared later by a strong definition in
828 a shared library. We account for that possibility below by
829 storing information in the relocs_copied field of the hash
830 table entry. A similar situation occurs when creating
831 shared libraries and symbol visibility changes render the
832 symbol local.
833
834 If on the other hand, we are creating an executable, we
835 may need to keep relocations for symbols satisfied by a
836 dynamic library if we manage to avoid copy relocs for the
837 symbol. */
838 if ((info->shared
839 && (sec->flags & SEC_ALLOC) != 0
bffbf940
JJ		 840 && (((r_type != R_X86_64_PC8)
841 && (r_type != R_X86_64_PC16)
842 && (r_type != R_X86_64_PC32))
c434dee6
AJ		 843 || (h != NULL
844 && (! info->symbolic
845 || h->root.type == bfd_link_hash_defweak
846 || (h->elf_link_hash_flags
847 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
d40d037c
AJ		 848 || (ELIMINATE_COPY_RELOCS
849 && !info->shared
c434dee6
AJ		 850 && (sec->flags & SEC_ALLOC) != 0
851 && h != NULL
852 && (h->root.type == bfd_link_hash_defweak
853 || (h->elf_link_hash_flags
854 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
70256ad8 855 {
c434dee6
AJ		 856 struct elf64_x86_64_dyn_relocs *p;
857 struct elf64_x86_64_dyn_relocs **head;
858
859 /* We must copy these reloc types into the output file.
860 Create a reloc section in dynobj and make room for
861 this reloc. */
70256ad8
AJ		 862 if (sreloc == NULL)
863 {
864 const char *name;
c434dee6 865 bfd *dynobj;
70256ad8
AJ		 866
867 name = (bfd_elf_string_from_elf_section
868 (abfd,
869 elf_elfheader (abfd)->e_shstrndx,
870 elf_section_data (sec)->rel_hdr.sh_name));
871 if (name == NULL)
b34976b6 872 return FALSE;
70256ad8 873
c434dee6
AJ		 874 if (strncmp (name, ".rela", 5) != 0
875 || strcmp (bfd_get_section_name (abfd, sec),
876 name + 5) != 0)
877 {
878 (*_bfd_error_handler)
879 (_("%s: bad relocation section name `%s\'"),
880 bfd_archive_filename (abfd), name);
881 }
882
883 if (htab->elf.dynobj == NULL)
884 htab->elf.dynobj = abfd;
885
886 dynobj = htab->elf.dynobj;
70256ad8
AJ		 887
888 sreloc = bfd_get_section_by_name (dynobj, name);
889 if (sreloc == NULL)
890 {
891 flagword flags;
892
893 sreloc = bfd_make_section (dynobj, name);
894 flags = (SEC_HAS_CONTENTS | SEC_READONLY
895 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
896 if ((sec->flags & SEC_ALLOC) != 0)
897 flags |= SEC_ALLOC | SEC_LOAD;
898 if (sreloc == NULL
899 || ! bfd_set_section_flags (dynobj, sreloc, flags)
cc78d0af 900 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
b34976b6 901 return FALSE;
70256ad8 902 }
c434dee6 903 elf_section_data (sec)->sreloc = sreloc;
70256ad8
AJ		 904 }
905
c434dee6
AJ		 906 /* If this is a global symbol, we count the number of
907 relocations we need for this symbol. */
908 if (h != NULL)
70256ad8 909 {
c434dee6
AJ		 910 head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs;
911 }
912 else
913 {
914 /* Track dynamic relocs needed for local syms too.
915 We really need local syms available to do this
916 easily. Oh well. */
917
918 asection *s;
919 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
920 sec, r_symndx);
921 if (s == NULL)
b34976b6 922 return FALSE;
70256ad8 923
c434dee6
AJ		 924 head = ((struct elf64_x86_64_dyn_relocs **)
925 &elf_section_data (s)->local_dynrel);
926 }
70256ad8 927
c434dee6
AJ		 928 p = *head;
929 if (p == NULL || p->sec != sec)
930 {
931 bfd_size_type amt = sizeof *p;
932 p = ((struct elf64_x86_64_dyn_relocs *)
933 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 934 if (p == NULL)
b34976b6 935 return FALSE;
c434dee6
AJ		 936 p->next = *head;
937 *head = p;
938 p->sec = sec;
939 p->count = 0;
940 p->pc_count = 0;
70256ad8 941 }
c434dee6
AJ		 942
943 p->count += 1;
bffbf940
JJ		 944 if (r_type == R_X86_64_PC8
945 || r_type == R_X86_64_PC16
946 || r_type == R_X86_64_PC32)
c434dee6 947 p->pc_count += 1;
70256ad8
AJ		 948 }
949 break;
fe4770f4
AJ		 950
951 /* This relocation describes the C++ object vtable hierarchy.
952 Reconstruct it for later use during GC. */
953 case R_X86_64_GNU_VTINHERIT:
c152c796 954 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 955 return FALSE;
fe4770f4
AJ		 956 break;
957
958 /* This relocation describes which C++ vtable entries are actually
959 used. Record for later use during GC. */
960 case R_X86_64_GNU_VTENTRY:
c152c796 961 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 962 return FALSE;
fe4770f4 963 break;
c434dee6
AJ		 964
965 default:
966 break;
70256ad8
AJ		 967 }
968 }
969
b34976b6 970 return TRUE;
70256ad8
AJ		 971}
972
973/* Return the section that should be marked against GC for a given
407443a3 974 relocation. */
70256ad8
AJ		 975
976static asection *
27482721
AJ		 977elf64_x86_64_gc_mark_hook (asection *sec,
978 struct bfd_link_info *info ATTRIBUTE_UNUSED,
979 Elf_Internal_Rela *rel,
980 struct elf_link_hash_entry *h,
981 Elf_Internal_Sym *sym)
70256ad8
AJ		 982{
983 if (h != NULL)
984 {
fe4770f4 985 switch (ELF64_R_TYPE (rel->r_info))
70256ad8 986 {
fe4770f4
AJ		 987 case R_X86_64_GNU_VTINHERIT:
988 case R_X86_64_GNU_VTENTRY:
989 break;
70256ad8
AJ		 990
991 default:
fe4770f4
AJ		 992 switch (h->root.type)
993 {
994 case bfd_link_hash_defined:
995 case bfd_link_hash_defweak:
996 return h->root.u.def.section;
997
998 case bfd_link_hash_common:
999 return h->root.u.c.p->section;
1000
1001 default:
1002 break;
1003 }
70256ad8
AJ		 1004 }
1005 }
1006 else
1e2f5b6e 1007 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
70256ad8
AJ		 1008
1009 return NULL;
1010}
1011
407443a3 1012/* Update the got entry reference counts for the section being removed. */
70256ad8 1013
b34976b6 1014static bfd_boolean
27482721
AJ		 1015elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
1016 asection *sec, const Elf_Internal_Rela *relocs)
70256ad8
AJ		 1017{
1018 Elf_Internal_Shdr *symtab_hdr;
1019 struct elf_link_hash_entry **sym_hashes;
1020 bfd_signed_vma *local_got_refcounts;
1021 const Elf_Internal_Rela *rel, *relend;
c434dee6
AJ		 1022
1023 elf_section_data (sec)->local_dynrel = NULL;
70256ad8
AJ		 1024
1025 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1026 sym_hashes = elf_sym_hashes (abfd);
1027 local_got_refcounts = elf_local_got_refcounts (abfd);
1028
70256ad8
AJ		 1029 relend = relocs + sec->reloc_count;
1030 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 1031 {
1032 unsigned long r_symndx;
1033 unsigned int r_type;
1034 struct elf_link_hash_entry *h = NULL;
70256ad8 1035
26e41594
AM		 1036 r_symndx = ELF64_R_SYM (rel->r_info);
1037 if (r_symndx >= symtab_hdr->sh_info)
1038 {
1039 struct elf64_x86_64_link_hash_entry *eh;
1040 struct elf64_x86_64_dyn_relocs **pp;
1041 struct elf64_x86_64_dyn_relocs *p;
c434dee6 1042
26e41594
AM		 1043 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1044 eh = (struct elf64_x86_64_link_hash_entry *) h;
c434dee6 1045
26e41594
AM		 1046 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1047 if (p->sec == sec)
1048 {
1049 /* Everything must go for SEC. */
1050 *pp = p->next;
1051 break;
1052 }
1053 }
c434dee6 1054
26e41594
AM		 1055 r_type = ELF64_R_TYPE (rel->r_info);
1056 r_type = elf64_x86_64_tls_transition (info, r_type, h != NULL);
1057 switch (r_type)
1058 {
1059 case R_X86_64_TLSLD:
1060 if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0)
1061 elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1;
1062 break;
c434dee6 1063
26e41594
AM		 1064 case R_X86_64_TLSGD:
1065 case R_X86_64_GOTTPOFF:
1066 case R_X86_64_GOT32:
1067 case R_X86_64_GOTPCREL:
1068 if (h != NULL)
1069 {
1070 if (h->got.refcount > 0)
1071 h->got.refcount -= 1;
1072 }
1073 else if (local_got_refcounts != NULL)
1074 {
1075 if (local_got_refcounts[r_symndx] > 0)
1076 local_got_refcounts[r_symndx] -= 1;
1077 }
1078 break;
c434dee6 1079
26e41594
AM		 1080 case R_X86_64_8:
1081 case R_X86_64_16:
1082 case R_X86_64_32:
1083 case R_X86_64_64:
1084 case R_X86_64_32S:
1085 case R_X86_64_PC8:
1086 case R_X86_64_PC16:
1087 case R_X86_64_PC32:
1088 if (info->shared)
1089 break;
1090 /* Fall thru */
c434dee6 1091
26e41594
AM		 1092 case R_X86_64_PLT32:
1093 if (h != NULL)
1094 {
1095 if (h->plt.refcount > 0)
1096 h->plt.refcount -= 1;
1097 }
1098 break;
70256ad8 1099
26e41594
AM		 1100 default:
1101 break;
1102 }
1103 }
70256ad8 1104
b34976b6 1105 return TRUE;
70256ad8
AJ		 1106}
1107
1108/* Adjust a symbol defined by a dynamic object and referenced by a
1109 regular object. The current definition is in some section of the
1110 dynamic object, but we're not including those sections. We have to
1111 change the definition to something the rest of the link can
407443a3 1112 understand. */
70256ad8 1113
b34976b6 1114static bfd_boolean
27482721
AJ		 1115elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
1116 struct elf_link_hash_entry *h)
70256ad8 1117{
c434dee6 1118 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 1119 asection *s;
1120 unsigned int power_of_two;
1121
70256ad8
AJ		 1122 /* If this is a function, put it in the procedure linkage table. We
1123 will fill in the contents of the procedure linkage table later,
1124 when we know the address of the .got section. */
1125 if (h->type == STT_FUNC
1126 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1127 {
c434dee6 1128 if (h->plt.refcount <= 0
27482721
AJ		 1129 || SYMBOL_CALLS_LOCAL (info, h)
1130 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1131 && h->root.type == bfd_link_hash_undefweak))
70256ad8 1132 {
70256ad8
AJ		 1133 /* This case can occur if we saw a PLT32 reloc in an input
1134 file, but the symbol was never referred to by a dynamic
1135 object, or if all references were garbage collected. In
1136 such a case, we don't actually need to build a procedure
1137 linkage table, and we can just do a PC32 reloc instead. */
70256ad8
AJ		 1138 h->plt.offset = (bfd_vma) -1;
1139 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
70256ad8
AJ		 1140 }
1141
b34976b6 1142 return TRUE;
70256ad8 1143 }
bbd7ec4a 1144 else
c434dee6
AJ		 1145 /* It's possible that we incorrectly decided a .plt reloc was
1146 needed for an R_X86_64_PC32 reloc to a non-function sym in
1147 check_relocs. We can't decide accurately between function and
1148 non-function syms in check-relocs; Objects loaded later in
1149 the link may change h->type. So fix it now. */
bbd7ec4a 1150 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ		 1151
1152 /* If this is a weak symbol, and there is a real definition, the
1153 processor independent code will have arranged for us to see the
407443a3 1154 real definition first, and we can just use the same value. */
70256ad8
AJ		 1155 if (h->weakdef != NULL)
1156 {
1157 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1158 || h->weakdef->root.type == bfd_link_hash_defweak);
1159 h->root.u.def.section = h->weakdef->root.u.def.section;
1160 h->root.u.def.value = h->weakdef->root.u.def.value;
d40d037c
AJ		 1161 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1162 h->elf_link_hash_flags
1163 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1164 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
b34976b6 1165 return TRUE;
70256ad8
AJ		 1166 }
1167
1168 /* This is a reference to a symbol defined by a dynamic object which
407443a3 1169 is not a function. */
70256ad8
AJ		 1170
1171 /* If we are creating a shared library, we must presume that the
1172 only references to the symbol are via the global offset table.
1173 For such cases we need not do anything here; the relocations will
407443a3 1174 be handled correctly by relocate_section. */
70256ad8 1175 if (info->shared)
b34976b6 1176 return TRUE;
70256ad8
AJ		 1177
1178 /* If there are no references to this symbol that do not use the
1179 GOT, we don't need to generate a copy reloc. */
1180 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
b34976b6 1181 return TRUE;
70256ad8 1182
c434dee6
AJ		 1183 /* If -z nocopyreloc was given, we won't generate them either. */
1184 if (info->nocopyreloc)
1185 {
1186 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
b34976b6 1187 return TRUE;
c434dee6
AJ		 1188 }
1189
d40d037c 1190 if (ELIMINATE_COPY_RELOCS)
c434dee6 1191 {
d40d037c
AJ		 1192 struct elf64_x86_64_link_hash_entry * eh;
1193 struct elf64_x86_64_dyn_relocs *p;
c434dee6 1194
d40d037c
AJ		 1195 eh = (struct elf64_x86_64_link_hash_entry *) h;
1196 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1197 {
1198 s = p->sec->output_section;
1199 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1200 break;
1201 }
1202
1203 /* If we didn't find any dynamic relocs in read-only sections, then
1204 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1205 if (p == NULL)
1206 {
1207 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1208 return TRUE;
1209 }
c434dee6
AJ		 1210 }
1211
70256ad8 1212 /* We must allocate the symbol in our .dynbss section, which will
407443a3 1213 become part of the .bss section of the executable. There will be
70256ad8
AJ		 1214 an entry for this symbol in the .dynsym section. The dynamic
1215 object will contain position independent code, so all references
1216 from the dynamic object to this symbol will go through the global
1217 offset table. The dynamic linker will use the .dynsym entry to
1218 determine the address it must put in the global offset table, so
1219 both the dynamic object and the regular object will refer to the
1220 same memory location for the variable. */
1221
c434dee6 1222 htab = elf64_x86_64_hash_table (info);
70256ad8
AJ		 1223
1224 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
1225 to copy the initial value out of the dynamic object and into the
cedb70c5 1226 runtime process image. */
70256ad8
AJ		 1227 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1228 {
c434dee6 1229 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
70256ad8
AJ		 1230 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1231 }
1232
1233 /* We need to figure out the alignment required for this symbol. I
407443a3 1234 have no idea how ELF linkers handle this. 16-bytes is the size
70256ad8
AJ		 1235 of the largest type that requires hard alignment -- long double. */
1236 /* FIXME: This is VERY ugly. Should be fixed for all architectures using
1237 this construct. */
1238 power_of_two = bfd_log2 (h->size);
1239 if (power_of_two > 4)
1240 power_of_two = 4;
1241
1242 /* Apply the required alignment. */
c434dee6 1243 s = htab->sdynbss;
70256ad8 1244 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
c434dee6 1245 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
70256ad8 1246 {
c434dee6 1247 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
b34976b6 1248 return FALSE;
70256ad8
AJ		 1249 }
1250
1251 /* Define the symbol as being at this point in the section. */
1252 h->root.u.def.section = s;
1253 h->root.u.def.value = s->_raw_size;
1254
1255 /* Increment the section size to make room for the symbol. */
1256 s->_raw_size += h->size;
1257
b34976b6 1258 return TRUE;
70256ad8
AJ		 1259}
1260
c434dee6
AJ		 1261/* Allocate space in .plt, .got and associated reloc sections for
1262 dynamic relocs. */
1263
b34976b6 1264static bfd_boolean
27482721 1265allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 1266{
1267 struct bfd_link_info *info;
1268 struct elf64_x86_64_link_hash_table *htab;
1269 struct elf64_x86_64_link_hash_entry *eh;
1270 struct elf64_x86_64_dyn_relocs *p;
1271
e92d460e 1272 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1273 return TRUE;
c434dee6 1274
e92d460e
AM		 1275 if (h->root.type == bfd_link_hash_warning)
1276 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1277
c434dee6
AJ		 1278 info = (struct bfd_link_info *) inf;
1279 htab = elf64_x86_64_hash_table (info);
1280
1281 if (htab->elf.dynamic_sections_created
27482721 1282 && h->plt.refcount > 0)
c434dee6
AJ		 1283 {
1284 /* Make sure this symbol is output as a dynamic symbol.
1285 Undefined weak syms won't yet be marked as dynamic. */
1286 if (h->dynindx == -1
1287 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1288 {
c152c796 1289 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1290 return FALSE;
c434dee6
AJ		 1291 }
1292
27482721
AJ		 1293 if (info->shared
1294 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6
AJ		 1295 {
1296 asection *s = htab->splt;
1297
1298 /* If this is the first .plt entry, make room for the special
1299 first entry. */
1300 if (s->_raw_size == 0)
1301 s->_raw_size += PLT_ENTRY_SIZE;
1302
1303 h->plt.offset = s->_raw_size;
1304
1305 /* If this symbol is not defined in a regular file, and we are
1306 not generating a shared library, then set the symbol to this
1307 location in the .plt. This is required to make function
1308 pointers compare as equal between the normal executable and
1309 the shared library. */
1310 if (! info->shared
1311 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1312 {
1313 h->root.u.def.section = s;
1314 h->root.u.def.value = h->plt.offset;
1315 }
1316
1317 /* Make room for this entry. */
1318 s->_raw_size += PLT_ENTRY_SIZE;
1319
1320 /* We also need to make an entry in the .got.plt section, which
1321 will be placed in the .got section by the linker script. */
1322 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1323
1324 /* We also need to make an entry in the .rela.plt section. */
1325 htab->srelplt->_raw_size += sizeof (Elf64_External_Rela);
1326 }
1327 else
1328 {
1329 h->plt.offset = (bfd_vma) -1;
1330 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1331 }
1332 }
1333 else
1334 {
1335 h->plt.offset = (bfd_vma) -1;
1336 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1337 }
1338
bffbf940
JJ		 1339 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
1340 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
1341 if (h->got.refcount > 0
1342 && !info->shared
1343 && h->dynindx == -1
1344 && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
1345 h->got.offset = (bfd_vma) -1;
1346 else if (h->got.refcount > 0)
c434dee6
AJ		 1347 {
1348 asection *s;
b34976b6 1349 bfd_boolean dyn;
bffbf940 1350 int tls_type = elf64_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ		 1351
1352 /* Make sure this symbol is output as a dynamic symbol.
1353 Undefined weak syms won't yet be marked as dynamic. */
1354 if (h->dynindx == -1
1355 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1356 {
c152c796 1357 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1358 return FALSE;
c434dee6
AJ		 1359 }
1360
1361 s = htab->sgot;
1362 h->got.offset = s->_raw_size;
1363 s->_raw_size += GOT_ENTRY_SIZE;
bffbf940
JJ		 1364 /* R_X86_64_TLSGD needs 2 consecutive GOT slots. */
1365 if (tls_type == GOT_TLS_GD)
1366 s->_raw_size += GOT_ENTRY_SIZE;
c434dee6 1367 dyn = htab->elf.dynamic_sections_created;
bffbf940
JJ		 1368 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
1369 and two if global.
1370 R_X86_64_GOTTPOFF needs one dynamic relocation. */
1371 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1372 || tls_type == GOT_TLS_IE)
1373 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1374 else if (tls_type == GOT_TLS_GD)
1375 htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela);
4bc6e03a
AJ		 1376 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1377 || h->root.type != bfd_link_hash_undefweak)
27482721
AJ		 1378 && (info->shared
1379 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
c434dee6
AJ		 1380 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1381 }
1382 else
1383 h->got.offset = (bfd_vma) -1;
1384
1385 eh = (struct elf64_x86_64_link_hash_entry *) h;
1386 if (eh->dyn_relocs == NULL)
b34976b6 1387 return TRUE;
c434dee6
AJ		 1388
1389 /* In the shared -Bsymbolic case, discard space allocated for
1390 dynamic pc-relative relocs against symbols which turn out to be
1391 defined in regular objects. For the normal shared case, discard
1392 space for pc-relative relocs that have become local due to symbol
1393 visibility changes. */
1394
1395 if (info->shared)
1396 {
27482721
AJ		 1397 /* Relocs that use pc_count are those that appear on a call
1398 insn, or certain REL relocs that can generated via assembly.
1399 We want calls to protected symbols to resolve directly to the
1400 function rather than going via the plt. If people want
1401 function pointer comparisons to work as expected then they
1402 should avoid writing weird assembly. */
1403 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6
AJ		 1404 {
1405 struct elf64_x86_64_dyn_relocs **pp;
1406
1407 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1408 {
1409 p->count -= p->pc_count;
1410 p->pc_count = 0;
1411 if (p->count == 0)
1412 *pp = p->next;
1413 else
1414 pp = &p->next;
1415 }
1416 }
4e795f50
AM		 1417
1418 /* Also discard relocs on undefined weak syms with non-default
1419 visibility. */
1420 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1421 && h->root.type == bfd_link_hash_undefweak)
1422 eh->dyn_relocs = NULL;
c434dee6 1423 }
d40d037c 1424 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ		 1425 {
1426 /* For the non-shared case, discard space for relocs against
1427 symbols which turn out to need copy relocs or are not
1428 dynamic. */
1429
1430 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1431 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1432 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1433 || (htab->elf.dynamic_sections_created
1434 && (h->root.type == bfd_link_hash_undefweak
1435 || h->root.type == bfd_link_hash_undefined))))
1436 {
1437 /* Make sure this symbol is output as a dynamic symbol.
1438 Undefined weak syms won't yet be marked as dynamic. */
1439 if (h->dynindx == -1
1440 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1441 {
c152c796 1442 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1443 return FALSE;
c434dee6
AJ		 1444 }
1445
1446 /* If that succeeded, we know we'll be keeping all the
1447 relocs. */
1448 if (h->dynindx != -1)
1449 goto keep;
1450 }
1451
1452 eh->dyn_relocs = NULL;
1453
1454 keep: ;
1455 }
1456
1457 /* Finally, allocate space. */
1458 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1459 {
1460 asection *sreloc = elf_section_data (p->sec)->sreloc;
1461 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
1462 }
1463
b34976b6 1464 return TRUE;
c434dee6
AJ		 1465}
1466
1467/* Find any dynamic relocs that apply to read-only sections. */
1468
b34976b6 1469static bfd_boolean
27482721 1470readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 1471{
1472 struct elf64_x86_64_link_hash_entry *eh;
1473 struct elf64_x86_64_dyn_relocs *p;
1474
e92d460e
AM		 1475 if (h->root.type == bfd_link_hash_warning)
1476 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1477
c434dee6
AJ		 1478 eh = (struct elf64_x86_64_link_hash_entry *) h;
1479 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1480 {
1481 asection *s = p->sec->output_section;
1482
1483 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1484 {
1485 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1486
1487 info->flags |= DF_TEXTREL;
1488
1489 /* Not an error, just cut short the traversal. */
b34976b6 1490 return FALSE;
c434dee6
AJ		 1491 }
1492 }
b34976b6 1493 return TRUE;
c434dee6
AJ		 1494}
1495
70256ad8
AJ		 1496/* Set the sizes of the dynamic sections. */
1497
b34976b6 1498static bfd_boolean
27482721
AJ		 1499elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1500 struct bfd_link_info *info)
70256ad8 1501{
c434dee6 1502 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 1503 bfd *dynobj;
1504 asection *s;
b34976b6 1505 bfd_boolean relocs;
c434dee6 1506 bfd *ibfd;
70256ad8 1507
c434dee6
AJ		 1508 htab = elf64_x86_64_hash_table (info);
1509 dynobj = htab->elf.dynobj;
1510 if (dynobj == NULL)
1511 abort ();
70256ad8 1512
c434dee6 1513 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 1514 {
1515 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 1516 if (info->executable)
70256ad8
AJ		 1517 {
1518 s = bfd_get_section_by_name (dynobj, ".interp");
c434dee6
AJ		 1519 if (s == NULL)
1520 abort ();
70256ad8
AJ		 1521 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1522 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1523 }
1524 }
70256ad8 1525
c434dee6
AJ		 1526 /* Set up .got offsets for local syms, and space for local dynamic
1527 relocs. */
1528 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
70256ad8 1529 {
c434dee6
AJ		 1530 bfd_signed_vma *local_got;
1531 bfd_signed_vma *end_local_got;
bffbf940 1532 char *local_tls_type;
c434dee6
AJ		 1533 bfd_size_type locsymcount;
1534 Elf_Internal_Shdr *symtab_hdr;
1535 asection *srel;
70256ad8 1536
c434dee6 1537 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
70256ad8
AJ		 1538 continue;
1539
c434dee6 1540 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 1541 {
c434dee6
AJ		 1542 struct elf64_x86_64_dyn_relocs *p;
1543
1544 for (p = *((struct elf64_x86_64_dyn_relocs **)
1545 &elf_section_data (s)->local_dynrel);
1546 p != NULL;
1547 p = p->next)
70256ad8 1548 {
c434dee6
AJ		 1549 if (!bfd_is_abs_section (p->sec)
1550 && bfd_is_abs_section (p->sec->output_section))
1551 {
1552 /* Input section has been discarded, either because
1553 it is a copy of a linkonce section or due to
1554 linker script /DISCARD/, so we'll be discarding
1555 the relocs too. */
1556 }
1557 else if (p->count != 0)
1558 {
1559 srel = elf_section_data (p->sec)->sreloc;
1560 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
1561 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1562 info->flags |= DF_TEXTREL;
1563
1564 }
70256ad8
AJ		 1565 }
1566 }
c434dee6
AJ		 1567
1568 local_got = elf_local_got_refcounts (ibfd);
1569 if (!local_got)
1570 continue;
1571
1572 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1573 locsymcount = symtab_hdr->sh_info;
1574 end_local_got = local_got + locsymcount;
bffbf940 1575 local_tls_type = elf64_x86_64_local_got_tls_type (ibfd);
c434dee6
AJ		 1576 s = htab->sgot;
1577 srel = htab->srelgot;
bffbf940 1578 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
70256ad8 1579 {
c434dee6 1580 if (*local_got > 0)
70256ad8 1581 {
c434dee6
AJ		 1582 *local_got = s->_raw_size;
1583 s->_raw_size += GOT_ENTRY_SIZE;
bffbf940
JJ		 1584 if (*local_tls_type == GOT_TLS_GD)
1585 s->_raw_size += GOT_ENTRY_SIZE;
1586 if (info->shared
1587 || *local_tls_type == GOT_TLS_GD
1588 || *local_tls_type == GOT_TLS_IE)
c434dee6 1589 srel->_raw_size += sizeof (Elf64_External_Rela);
70256ad8
AJ		 1590 }
1591 else
c434dee6
AJ		 1592 *local_got = (bfd_vma) -1;
1593 }
1594 }
70256ad8 1595
bffbf940
JJ		 1596 if (htab->tls_ld_got.refcount > 0)
1597 {
1598 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
1599 relocs. */
1600 htab->tls_ld_got.offset = htab->sgot->_raw_size;
1601 htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
1602 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1603 }
1604 else
1605 htab->tls_ld_got.offset = -1;
1606
c434dee6
AJ		 1607 /* Allocate global sym .plt and .got entries, and space for global
1608 sym dynamic relocs. */
1609 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1610
1611 /* We now have determined the sizes of the various dynamic sections.
1612 Allocate memory for them. */
b34976b6 1613 relocs = FALSE;
c434dee6
AJ		 1614 for (s = dynobj->sections; s != NULL; s = s->next)
1615 {
1616 if ((s->flags & SEC_LINKER_CREATED) == 0)
1617 continue;
1618
1619 if (s == htab->splt
1620 || s == htab->sgot
1621 || s == htab->sgotplt)
1622 {
1623 /* Strip this section if we don't need it; see the
1624 comment below. */
1625 }
1626 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
1627 {
1628 if (s->_raw_size != 0 && s != htab->srelplt)
b34976b6 1629 relocs = TRUE;
c434dee6
AJ		 1630
1631 /* We use the reloc_count field as a counter if we need
1632 to copy relocs into the output file. */
1633 s->reloc_count = 0;
70256ad8 1634 }
c434dee6 1635 else
70256ad8
AJ		 1636 {
1637 /* It's not one of our sections, so don't allocate space. */
1638 continue;
1639 }
1640
c434dee6 1641 if (s->_raw_size == 0)
70256ad8 1642 {
c434dee6
AJ		 1643 /* If we don't need this section, strip it from the
1644 output file. This is mostly to handle .rela.bss and
1645 .rela.plt. We must create both sections in
1646 create_dynamic_sections, because they must be created
1647 before the linker maps input sections to output
1648 sections. The linker does that before
1649 adjust_dynamic_symbol is called, and it is that
1650 function which decides whether anything needs to go
1651 into these sections. */
1652
70256ad8
AJ		 1653 _bfd_strip_section_from_output (info, s);
1654 continue;
1655 }
1656
1657 /* Allocate memory for the section contents. We use bfd_zalloc
1658 here in case unused entries are not reclaimed before the
1659 section's contents are written out. This should not happen,
1660 but this way if it does, we get a R_X86_64_NONE reloc instead
1661 of garbage. */
1662 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
c434dee6 1663 if (s->contents == NULL)
b34976b6 1664 return FALSE;
70256ad8
AJ		 1665 }
1666
c434dee6 1667 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 1668 {
1669 /* Add some entries to the .dynamic section. We fill in the
1670 values later, in elf64_x86_64_finish_dynamic_sections, but we
1671 must add the entries now so that we get the correct size for
407443a3 1672 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 1673 dynamic linker and used by the debugger. */
dc810e39 1674#define add_dynamic_entry(TAG, VAL) \
5a580b3a 1675 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 1676
36af4a4e 1677 if (info->executable)
70256ad8 1678 {
dc810e39 1679 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 1680 return FALSE;
70256ad8
AJ		 1681 }
1682
c434dee6 1683 if (htab->splt->_raw_size != 0)
70256ad8 1684 {
dc810e39
AM		 1685 if (!add_dynamic_entry (DT_PLTGOT, 0)
1686 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1687 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1688 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 1689 return FALSE;
70256ad8
AJ		 1690 }
1691
1692 if (relocs)
1693 {
dc810e39
AM		 1694 if (!add_dynamic_entry (DT_RELA, 0)
1695 || !add_dynamic_entry (DT_RELASZ, 0)
1696 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
b34976b6 1697 return FALSE;
70256ad8 1698
c434dee6
AJ		 1699 /* If any dynamic relocs apply to a read-only section,
1700 then we need a DT_TEXTREL entry. */
1701 if ((info->flags & DF_TEXTREL) == 0)
1702 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1703 (PTR) info);
1704
1705 if ((info->flags & DF_TEXTREL) != 0)
1706 {
1707 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 1708 return FALSE;
c434dee6 1709 }
70256ad8
AJ		 1710 }
1711 }
dc810e39 1712#undef add_dynamic_entry
70256ad8 1713
b34976b6 1714 return TRUE;
70256ad8
AJ		 1715}
1716
bffbf940
JJ		 1717/* Return the base VMA address which should be subtracted from real addresses
1718 when resolving @dtpoff relocation.
1719 This is PT_TLS segment p_vaddr. */
1720
1721static bfd_vma
27482721 1722dtpoff_base (struct bfd_link_info *info)
bffbf940 1723{
e1918d23
AM		 1724 /* If tls_sec is NULL, we should have signalled an error already. */
1725 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 1726 return 0;
e1918d23 1727 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ		 1728}
1729
1730/* Return the relocation value for @tpoff relocation
1731 if STT_TLS virtual address is ADDRESS. */
1732
1733static bfd_vma
27482721 1734tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 1735{
e1918d23 1736 struct elf_link_hash_table *htab = elf_hash_table (info);
bffbf940
JJ		 1737
1738 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 1739 if (htab->tls_sec == NULL)
bffbf940 1740 return 0;
e1918d23 1741 return address - htab->tls_size - htab->tls_sec->vma;
bffbf940
JJ		 1742}
1743
8d88c4ca
NC		 1744/* Relocate an x86_64 ELF section. */
1745
b34976b6 1746static bfd_boolean
27482721
AJ		 1747elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
1748 bfd *input_bfd, asection *input_section,
1749 bfd_byte *contents, Elf_Internal_Rela *relocs,
1750 Elf_Internal_Sym *local_syms,
1751 asection **local_sections)
8d88c4ca 1752{
c434dee6 1753 struct elf64_x86_64_link_hash_table *htab;
8d88c4ca
NC		 1754 Elf_Internal_Shdr *symtab_hdr;
1755 struct elf_link_hash_entry **sym_hashes;
1756 bfd_vma *local_got_offsets;
c434dee6 1757 Elf_Internal_Rela *rel;
8d88c4ca
NC		 1758 Elf_Internal_Rela *relend;
1759
1049f94e 1760 if (info->relocatable)
b34976b6 1761 return TRUE;
b491616a 1762
c434dee6 1763 htab = elf64_x86_64_hash_table (info);
8d88c4ca
NC		 1764 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1765 sym_hashes = elf_sym_hashes (input_bfd);
1766 local_got_offsets = elf_local_got_offsets (input_bfd);
1767
c434dee6 1768 rel = relocs;
8d88c4ca 1769 relend = relocs + input_section->reloc_count;
c434dee6 1770 for (; rel < relend; rel++)
8d88c4ca 1771 {
bffbf940 1772 unsigned int r_type;
8d88c4ca
NC		 1773 reloc_howto_type *howto;
1774 unsigned long r_symndx;
1775 struct elf_link_hash_entry *h;
1776 Elf_Internal_Sym *sym;
1777 asection *sec;
c434dee6 1778 bfd_vma off;
8d88c4ca 1779 bfd_vma relocation;
b34976b6 1780 bfd_boolean unresolved_reloc;
8d88c4ca 1781 bfd_reloc_status_type r;
bffbf940 1782 int tls_type;
8d88c4ca 1783
c434dee6 1784 r_type = ELF64_R_TYPE (rel->r_info);
fe4770f4
AJ		 1785 if (r_type == (int) R_X86_64_GNU_VTINHERIT
1786 || r_type == (int) R_X86_64_GNU_VTENTRY)
1787 continue;
8d88c4ca 1788
bffbf940 1789 if (r_type >= R_X86_64_max)
8da6118f
KH		 1790 {
1791 bfd_set_error (bfd_error_bad_value);
b34976b6 1792 return FALSE;
8da6118f 1793 }
8d88c4ca 1794
b491616a 1795 howto = x86_64_elf_howto_table + r_type;
c434dee6 1796 r_symndx = ELF64_R_SYM (rel->r_info);
8d88c4ca
NC		 1797 h = NULL;
1798 sym = NULL;
1799 sec = NULL;
b34976b6 1800 unresolved_reloc = FALSE;
8d88c4ca 1801 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH		 1802 {
1803 sym = local_syms + r_symndx;
1804 sec = local_sections[r_symndx];
c434dee6 1805
8517fae7 1806 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8da6118f 1807 }
8d88c4ca 1808 else
8da6118f 1809 {
560e09e9 1810 bfd_boolean warned;
c434dee6 1811
b2a8e766
AM		 1812 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1813 r_symndx, symtab_hdr, sym_hashes,
1814 h, sec, relocation,
1815 unresolved_reloc, warned);
8da6118f 1816 }
70256ad8
AJ		 1817 /* When generating a shared object, the relocations handled here are
1818 copied into the output file to be resolved at run time. */
1819 switch (r_type)
1820 {
1821 case R_X86_64_GOT32:
1822 /* Relocation is to the entry for this symbol in the global
1823 offset table. */
70256ad8
AJ		 1824 case R_X86_64_GOTPCREL:
1825 /* Use global offset table as symbol value. */
c434dee6
AJ		 1826 if (htab->sgot == NULL)
1827 abort ();
053579d7 1828
51e0a107 1829 if (h != NULL)
70256ad8 1830 {
b34976b6 1831 bfd_boolean dyn;
c434dee6
AJ		 1832
1833 off = h->got.offset;
1834 dyn = htab->elf.dynamic_sections_created;
51e0a107 1835
27482721 1836 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
51e0a107 1837 || (info->shared
27482721 1838 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ		 1839 || (ELF_ST_VISIBILITY (h->other)
1840 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH		 1841 {
1842 /* This is actually a static link, or it is a -Bsymbolic
1843 link and the symbol is defined locally, or the symbol
407443a3 1844 was forced to be local because of a version file. We
51e0a107
JH		 1845 must initialize this entry in the global offset table.
1846 Since the offset must always be a multiple of 8, we
1847 use the least significant bit to record whether we
1848 have initialized it already.
1849
1850 When doing a dynamic link, we create a .rela.got
407443a3
AJ		 1851 relocation entry to initialize the value. This is
1852 done in the finish_dynamic_symbol routine. */
51e0a107
JH		 1853 if ((off & 1) != 0)
1854 off &= ~1;
1855 else
1856 {
1857 bfd_put_64 (output_bfd, relocation,
c434dee6 1858 htab->sgot->contents + off);
51e0a107
JH		 1859 h->got.offset |= 1;
1860 }
1861 }
053579d7 1862 else
b34976b6 1863 unresolved_reloc = FALSE;
70256ad8 1864 }
51e0a107
JH		 1865 else
1866 {
c434dee6
AJ		 1867 if (local_got_offsets == NULL)
1868 abort ();
51e0a107
JH		 1869
1870 off = local_got_offsets[r_symndx];
1871
1872 /* The offset must always be a multiple of 8. We use
407443a3
AJ		 1873 the least significant bit to record whether we have
1874 already generated the necessary reloc. */
51e0a107
JH		 1875 if ((off & 1) != 0)
1876 off &= ~1;
1877 else
1878 {
c434dee6
AJ		 1879 bfd_put_64 (output_bfd, relocation,
1880 htab->sgot->contents + off);
51e0a107
JH		 1881
1882 if (info->shared)
1883 {
947216bf 1884 asection *s;
51e0a107 1885 Elf_Internal_Rela outrel;
947216bf 1886 bfd_byte *loc;
70256ad8 1887
51e0a107
JH		 1888 /* We need to generate a R_X86_64_RELATIVE reloc
1889 for the dynamic linker. */
947216bf
AM		 1890 s = htab->srelgot;
1891 if (s == NULL)
c434dee6 1892 abort ();
51e0a107 1893
c434dee6
AJ		 1894 outrel.r_offset = (htab->sgot->output_section->vma
1895 + htab->sgot->output_offset
51e0a107
JH		 1896 + off);
1897 outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
1898 outrel.r_addend = relocation;
947216bf
AM		 1899 loc = s->contents;
1900 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 1901 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
51e0a107
JH		 1902 }
1903
1904 local_got_offsets[r_symndx] |= 1;
1905 }
51e0a107 1906 }
6a2bda3f 1907
c434dee6
AJ		 1908 if (off >= (bfd_vma) -2)
1909 abort ();
1910
1911 relocation = htab->sgot->output_offset + off;
1912 if (r_type == R_X86_64_GOTPCREL)
1913 relocation += htab->sgot->output_section->vma;
1914
70256ad8
AJ		 1915 break;
1916
1917 case R_X86_64_PLT32:
1918 /* Relocation is to the entry for this symbol in the
1919 procedure linkage table. */
1920
1921 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 1922 without using the procedure linkage table. */
70256ad8
AJ		 1923 if (h == NULL)
1924 break;
1925
c434dee6
AJ		 1926 if (h->plt.offset == (bfd_vma) -1
1927 || htab->splt == NULL)
70256ad8
AJ		 1928 {
1929 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ		 1930 happens when statically linking PIC code, or when
1931 using -Bsymbolic. */
70256ad8
AJ		 1932 break;
1933 }
1934
c434dee6
AJ		 1935 relocation = (htab->splt->output_section->vma
1936 + htab->splt->output_offset
70256ad8 1937 + h->plt.offset);
b34976b6 1938 unresolved_reloc = FALSE;
70256ad8
AJ		 1939 break;
1940
fd8ab9e5
AJ		 1941 case R_X86_64_PC8:
1942 case R_X86_64_PC16:
1943 case R_X86_64_PC32:
70256ad8
AJ		 1944 case R_X86_64_8:
1945 case R_X86_64_16:
1946 case R_X86_64_32:
6b3db546 1947 case R_X86_64_64:
80643fbc 1948 /* FIXME: The ABI says the linker should make sure the value is
407443a3 1949 the same when it's zeroextended to 64 bit. */
c434dee6
AJ		 1950
1951 /* r_symndx will be zero only for relocs against symbols
1952 from removed linkonce sections, or sections discarded by
1953 a linker script. */
1954 if (r_symndx == 0
1955 || (input_section->flags & SEC_ALLOC) == 0)
1956 break;
1957
1958 if ((info->shared
4bc6e03a
AJ		 1959 && (h == NULL
1960 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1961 || h->root.type != bfd_link_hash_undefweak)
c434dee6
AJ		 1962 && ((r_type != R_X86_64_PC8
1963 && r_type != R_X86_64_PC16
1964 && r_type != R_X86_64_PC32)
f6c52c13 1965 || !SYMBOL_CALLS_LOCAL (info, h)))
d40d037c
AJ		 1966 || (ELIMINATE_COPY_RELOCS
1967 && !info->shared
c434dee6
AJ		 1968 && h != NULL
1969 && h->dynindx != -1
1970 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1971 && (((h->elf_link_hash_flags
1972 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1973 && (h->elf_link_hash_flags
1974 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1975 || h->root.type == bfd_link_hash_undefweak
1976 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ		 1977 {
1978 Elf_Internal_Rela outrel;
947216bf 1979 bfd_byte *loc;
b34976b6 1980 bfd_boolean skip, relocate;
c434dee6 1981 asection *sreloc;
70256ad8
AJ		 1982
1983 /* When generating a shared object, these relocations
1984 are copied into the output file to be resolved at run
407443a3 1985 time. */
b34976b6
AM		 1986 skip = FALSE;
1987 relocate = FALSE;
70256ad8 1988
c629eae0
JJ		 1989 outrel.r_offset =
1990 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 1991 rel->r_offset);
c629eae0 1992 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 1993 skip = TRUE;
0fb19cbc 1994 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 1995 skip = TRUE, relocate = TRUE;
70256ad8
AJ		 1996
1997 outrel.r_offset += (input_section->output_section->vma
1998 + input_section->output_offset);
1999
2000 if (skip)
0bb2d96a 2001 memset (&outrel, 0, sizeof outrel);
c434dee6 2002
fd8ab9e5
AJ		 2003 /* h->dynindx may be -1 if this symbol was marked to
2004 become local. */
2005 else if (h != NULL
c434dee6
AJ		 2006 && h->dynindx != -1
2007 && (r_type == R_X86_64_PC8
2008 || r_type == R_X86_64_PC16
2009 || r_type == R_X86_64_PC32
2010 || !info->shared
2011 || !info->symbolic
fd8ab9e5
AJ		 2012 || (h->elf_link_hash_flags
2013 & ELF_LINK_HASH_DEF_REGULAR) == 0))
70256ad8 2014 {
70256ad8 2015 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
c434dee6 2016 outrel.r_addend = rel->r_addend;
70256ad8
AJ		 2017 }
2018 else
2019 {
c434dee6 2020 /* This symbol is local, or marked to become local. */
607c0e09
AS		 2021 if (r_type == R_X86_64_64)
2022 {
b34976b6 2023 relocate = TRUE;
607c0e09
AS		 2024 outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
2025 outrel.r_addend = relocation + rel->r_addend;
2026 }
2027 else
2028 {
2029 long sindx;
2030
8517fae7 2031 if (bfd_is_abs_section (sec))
607c0e09
AS		 2032 sindx = 0;
2033 else if (sec == NULL || sec->owner == NULL)
2034 {
2035 bfd_set_error (bfd_error_bad_value);
b34976b6 2036 return FALSE;
607c0e09
AS		 2037 }
2038 else
2039 {
2040 asection *osec;
2041
2042 osec = sec->output_section;
2043 sindx = elf_section_data (osec)->dynindx;
2044 BFD_ASSERT (sindx > 0);
2045 }
2046
2047 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2048 outrel.r_addend = relocation + rel->r_addend;
2049 }
70256ad8
AJ		 2050 }
2051
c434dee6
AJ		 2052 sreloc = elf_section_data (input_section)->sreloc;
2053 if (sreloc == NULL)
2054 abort ();
2055
947216bf
AM		 2056 loc = sreloc->contents;
2057 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 2058 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
70256ad8
AJ		 2059
2060 /* If this reloc is against an external symbol, we do
2061 not want to fiddle with the addend. Otherwise, we
2062 need to include the symbol value so that it becomes
2063 an addend for the dynamic reloc. */
2064 if (! relocate)
2065 continue;
2066 }
2067
2068 break;
2069
bffbf940
JJ		 2070 case R_X86_64_TLSGD:
2071 case R_X86_64_GOTTPOFF:
2072 r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL);
2073 tls_type = GOT_UNKNOWN;
2074 if (h == NULL && local_got_offsets)
2075 tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx];
2076 else if (h != NULL)
2077 {
2078 tls_type = elf64_x86_64_hash_entry (h)->tls_type;
2079 if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE)
2080 r_type = R_X86_64_TPOFF32;
2081 }
2082 if (r_type == R_X86_64_TLSGD)
2083 {
2084 if (tls_type == GOT_TLS_IE)
2085 r_type = R_X86_64_GOTTPOFF;
2086 }
2087
2088 if (r_type == R_X86_64_TPOFF32)
2089 {
2090 BFD_ASSERT (! unresolved_reloc);
2091 if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
2092 {
2093 unsigned int i;
abcf1d52
JJ		 2094 static unsigned char tlsgd[8]
2095 = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 };
bffbf940
JJ		 2096
2097 /* GD->LE transition.
abcf1d52
JJ		 2098 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
2099 .word 0x6666; rex64; call __tls_get_addr@plt
bffbf940
JJ		 2100 Change it into:
2101 movq %fs:0, %rax
2102 leaq foo@tpoff(%rax), %rax */
abcf1d52
JJ		 2103 BFD_ASSERT (rel->r_offset >= 4);
2104 for (i = 0; i < 4; i++)
bffbf940 2105 BFD_ASSERT (bfd_get_8 (input_bfd,
abcf1d52 2106 contents + rel->r_offset - 4 + i)
bffbf940 2107 == tlsgd[i]);
abcf1d52
JJ		 2108 BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size);
2109 for (i = 0; i < 4; i++)
2110 BFD_ASSERT (bfd_get_8 (input_bfd,
2111 contents + rel->r_offset + 4 + i)
2112 == tlsgd[i+4]);
bffbf940
JJ		 2113 BFD_ASSERT (rel + 1 < relend);
2114 BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
abcf1d52 2115 memcpy (contents + rel->r_offset - 4,
bffbf940
JJ		 2116 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
2117 16);
2118 bfd_put_32 (output_bfd, tpoff (info, relocation),
abcf1d52 2119 contents + rel->r_offset + 8);
bffbf940
JJ		 2120 /* Skip R_X86_64_PLT32. */
2121 rel++;
2122 continue;
2123 }
2124 else
2125 {
2126 unsigned int val, type, reg;
2127
2128 /* IE->LE transition:
2129 Originally it can be one of:
2130 movq foo@gottpoff(%rip), %reg
2131 addq foo@gottpoff(%rip), %reg
2132 We change it into:
2133 movq $foo, %reg
2134 leaq foo(%reg), %reg
2135 addq $foo, %reg. */
2136 BFD_ASSERT (rel->r_offset >= 3);
2137 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3);
2138 BFD_ASSERT (val == 0x48 || val == 0x4c);
2139 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2140 BFD_ASSERT (type == 0x8b || type == 0x03);
2141 reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2142 BFD_ASSERT ((reg & 0xc7) == 5);
2143 reg >>= 3;
2144 BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
2145 if (type == 0x8b)
2146 {
2147 /* movq */
2148 if (val == 0x4c)
2149 bfd_put_8 (output_bfd, 0x49,
2150 contents + rel->r_offset - 3);
2151 bfd_put_8 (output_bfd, 0xc7,
2152 contents + rel->r_offset - 2);
2153 bfd_put_8 (output_bfd, 0xc0 | reg,
2154 contents + rel->r_offset - 1);
2155 }
2156 else if (reg == 4)
2157 {
2158 /* addq -> addq - addressing with %rsp/%r12 is
2159 special */
2160 if (val == 0x4c)
2161 bfd_put_8 (output_bfd, 0x49,
2162 contents + rel->r_offset - 3);
2163 bfd_put_8 (output_bfd, 0x81,
2164 contents + rel->r_offset - 2);
2165 bfd_put_8 (output_bfd, 0xc0 | reg,
2166 contents + rel->r_offset - 1);
2167 }
2168 else
2169 {
2170 /* addq -> leaq */
2171 if (val == 0x4c)
2172 bfd_put_8 (output_bfd, 0x4d,
2173 contents + rel->r_offset - 3);
2174 bfd_put_8 (output_bfd, 0x8d,
2175 contents + rel->r_offset - 2);
2176 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
2177 contents + rel->r_offset - 1);
2178 }
2179 bfd_put_32 (output_bfd, tpoff (info, relocation),
2180 contents + rel->r_offset);
2181 continue;
2182 }
2183 }
2184
2185 if (htab->sgot == NULL)
2186 abort ();
2187
2188 if (h != NULL)
2189 off = h->got.offset;
2190 else
2191 {
2192 if (local_got_offsets == NULL)
2193 abort ();
2194
2195 off = local_got_offsets[r_symndx];
2196 }
2197
2198 if ((off & 1) != 0)
2199 off &= ~1;
26e41594 2200 else
bffbf940
JJ		 2201 {
2202 Elf_Internal_Rela outrel;
947216bf 2203 bfd_byte *loc;
bffbf940
JJ		 2204 int dr_type, indx;
2205
2206 if (htab->srelgot == NULL)
2207 abort ();
2208
2209 outrel.r_offset = (htab->sgot->output_section->vma
2210 + htab->sgot->output_offset + off);
2211
2212 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2213 if (r_type == R_X86_64_TLSGD)
2214 dr_type = R_X86_64_DTPMOD64;
2215 else
2216 dr_type = R_X86_64_TPOFF64;
2217
2218 bfd_put_64 (output_bfd, 0, htab->sgot->contents + off);
2219 outrel.r_addend = 0;
2220 if (dr_type == R_X86_64_TPOFF64 && indx == 0)
2221 outrel.r_addend = relocation - dtpoff_base (info);
2222 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2223
947216bf
AM		 2224 loc = htab->srelgot->contents;
2225 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
bffbf940
JJ		 2226 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2227
2228 if (r_type == R_X86_64_TLSGD)
2229 {
2230 if (indx == 0)
2231 {
d40d037c 2232 BFD_ASSERT (! unresolved_reloc);
bffbf940
JJ		 2233 bfd_put_64 (output_bfd,
2234 relocation - dtpoff_base (info),
2235 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2236 }
2237 else
2238 {
2239 bfd_put_64 (output_bfd, 0,
2240 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2241 outrel.r_info = ELF64_R_INFO (indx,
2242 R_X86_64_DTPOFF64);
2243 outrel.r_offset += GOT_ENTRY_SIZE;
2244 htab->srelgot->reloc_count++;
947216bf
AM		 2245 loc += sizeof (Elf64_External_Rela);
2246 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
bffbf940
JJ		 2247 }
2248 }
2249
2250 if (h != NULL)
2251 h->got.offset |= 1;
2252 else
2253 local_got_offsets[r_symndx] |= 1;
2254 }
2255
2256 if (off >= (bfd_vma) -2)
2257 abort ();
2258 if (r_type == ELF64_R_TYPE (rel->r_info))
2259 {
2260 relocation = htab->sgot->output_section->vma
2261 + htab->sgot->output_offset + off;
b34976b6 2262 unresolved_reloc = FALSE;
bffbf940
JJ		 2263 }
2264 else
2265 {
2266 unsigned int i;
abcf1d52
JJ		 2267 static unsigned char tlsgd[8]
2268 = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 };
bffbf940
JJ		 2269
2270 /* GD->IE transition.
abcf1d52
JJ		 2271 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
2272 .word 0x6666; rex64; call __tls_get_addr@plt
bffbf940
JJ		 2273 Change it into:
2274 movq %fs:0, %rax
2275 addq foo@gottpoff(%rip), %rax */
abcf1d52
JJ		 2276 BFD_ASSERT (rel->r_offset >= 4);
2277 for (i = 0; i < 4; i++)
26e41594 2278 BFD_ASSERT (bfd_get_8 (input_bfd,
abcf1d52 2279 contents + rel->r_offset - 4 + i)
bffbf940 2280 == tlsgd[i]);
abcf1d52
JJ		 2281 BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size);
2282 for (i = 0; i < 4; i++)
26e41594 2283 BFD_ASSERT (bfd_get_8 (input_bfd,
abcf1d52
JJ		 2284 contents + rel->r_offset + 4 + i)
2285 == tlsgd[i+4]);
bffbf940
JJ		 2286 BFD_ASSERT (rel + 1 < relend);
2287 BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
abcf1d52 2288 memcpy (contents + rel->r_offset - 4,
bffbf940
JJ		 2289 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
2290 16);
2291
2292 relocation = (htab->sgot->output_section->vma
2293 + htab->sgot->output_offset + off
2294 - rel->r_offset
2295 - input_section->output_section->vma
2296 - input_section->output_offset
abcf1d52 2297 - 12);
bffbf940 2298 bfd_put_32 (output_bfd, relocation,
abcf1d52 2299 contents + rel->r_offset + 8);
bffbf940
JJ		 2300 /* Skip R_X86_64_PLT32. */
2301 rel++;
2302 continue;
2303 }
2304 break;
2305
2306 case R_X86_64_TLSLD:
2307 if (! info->shared)
2308 {
2309 /* LD->LE transition:
2310 Ensure it is:
2311 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt.
2312 We change it into:
2313 .word 0x6666; .byte 0x66; movl %fs:0, %rax. */
2314 BFD_ASSERT (rel->r_offset >= 3);
2315 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3)
2316 == 0x48);
2317 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
2318 == 0x8d);
2319 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1)
2320 == 0x3d);
2321 BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2322 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2323 == 0xe8);
2324 BFD_ASSERT (rel + 1 < relend);
2325 BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
2326 memcpy (contents + rel->r_offset - 3,
2327 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
2328 /* Skip R_X86_64_PLT32. */
2329 rel++;
2330 continue;
2331 }
2332
2333 if (htab->sgot == NULL)
2334 abort ();
2335
2336 off = htab->tls_ld_got.offset;
2337 if (off & 1)
2338 off &= ~1;
2339 else
2340 {
2341 Elf_Internal_Rela outrel;
947216bf 2342 bfd_byte *loc;
bffbf940
JJ		 2343
2344 if (htab->srelgot == NULL)
2345 abort ();
2346
2347 outrel.r_offset = (htab->sgot->output_section->vma
2348 + htab->sgot->output_offset + off);
2349
2350 bfd_put_64 (output_bfd, 0,
2351 htab->sgot->contents + off);
2352 bfd_put_64 (output_bfd, 0,
2353 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2354 outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64);
2355 outrel.r_addend = 0;
947216bf
AM		 2356 loc = htab->srelgot->contents;
2357 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
bffbf940
JJ		 2358 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2359 htab->tls_ld_got.offset |= 1;
2360 }
2361 relocation = htab->sgot->output_section->vma
2362 + htab->sgot->output_offset + off;
b34976b6 2363 unresolved_reloc = FALSE;
bffbf940
JJ		 2364 break;
2365
2366 case R_X86_64_DTPOFF32:
a45bb67d 2367 if (info->shared || (input_section->flags & SEC_CODE) == 0)
bffbf940
JJ		 2368 relocation -= dtpoff_base (info);
2369 else
2370 relocation = tpoff (info, relocation);
2371 break;
2372
2373 case R_X86_64_TPOFF32:
2374 BFD_ASSERT (! info->shared);
2375 relocation = tpoff (info, relocation);
2376 break;
2377
70256ad8
AJ		 2378 default:
2379 break;
2380 }
8d88c4ca 2381
239e1f3a
AM		 2382 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2383 because such sections are not SEC_ALLOC and thus ld.so will
2384 not process them. */
c434dee6 2385 if (unresolved_reloc
239e1f3a 2386 && !((input_section->flags & SEC_DEBUGGING) != 0
c434dee6
AJ		 2387 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2388 (*_bfd_error_handler)
2389 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2390 bfd_archive_filename (input_bfd),
2391 bfd_get_section_name (input_bfd, input_section),
2392 (long) rel->r_offset,
2393 h->root.root.string);
2394
8d88c4ca 2395 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ		 2396 contents, rel->r_offset,
2397 relocation, rel->r_addend);
8d88c4ca
NC		 2398
2399 if (r != bfd_reloc_ok)
8da6118f 2400 {
c434dee6
AJ		 2401 const char *name;
2402
2403 if (h != NULL)
2404 name = h->root.root.string;
2405 else
8da6118f 2406 {
c434dee6
AJ		 2407 name = bfd_elf_string_from_elf_section (input_bfd,
2408 symtab_hdr->sh_link,
2409 sym->st_name);
2410 if (name == NULL)
b34976b6 2411 return FALSE;
c434dee6
AJ		 2412 if (*name == '\0')
2413 name = bfd_section_name (input_bfd, sec);
2414 }
2415
2416 if (r == bfd_reloc_overflow)
2417 {
2418
2419 if (! ((*info->callbacks->reloc_overflow)
2420 (info, name, howto->name, (bfd_vma) 0,
2421 input_bfd, input_section, rel->r_offset)))
b34976b6 2422 return FALSE;
c434dee6
AJ		 2423 }
2424 else
2425 {
2426 (*_bfd_error_handler)
2427 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2428 bfd_archive_filename (input_bfd),
2429 bfd_get_section_name (input_bfd, input_section),
2430 (long) rel->r_offset, name, (int) r);
b34976b6 2431 return FALSE;
8da6118f
KH		 2432 }
2433 }
8d88c4ca 2434 }
70256ad8 2435
b34976b6 2436 return TRUE;
70256ad8
AJ		 2437}
2438
2439/* Finish up dynamic symbol handling. We set the contents of various
2440 dynamic sections here. */
2441
b34976b6 2442static bfd_boolean
27482721
AJ		 2443elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd,
2444 struct bfd_link_info *info,
2445 struct elf_link_hash_entry *h,
2446 Elf_Internal_Sym *sym)
70256ad8 2447{
c434dee6 2448 struct elf64_x86_64_link_hash_table *htab;
70256ad8 2449
c434dee6 2450 htab = elf64_x86_64_hash_table (info);
70256ad8
AJ		 2451
2452 if (h->plt.offset != (bfd_vma) -1)
2453 {
70256ad8
AJ		 2454 bfd_vma plt_index;
2455 bfd_vma got_offset;
2456 Elf_Internal_Rela rela;
947216bf 2457 bfd_byte *loc;
70256ad8
AJ		 2458
2459 /* This symbol has an entry in the procedure linkage table. Set
407443a3 2460 it up. */
c434dee6
AJ		 2461 if (h->dynindx == -1
2462 || htab->splt == NULL
2463 || htab->sgotplt == NULL
2464 || htab->srelplt == NULL)
2465 abort ();
70256ad8
AJ		 2466
2467 /* Get the index in the procedure linkage table which
2468 corresponds to this symbol. This is the index of this symbol
2469 in all the symbols for which we are making plt entries. The
2470 first entry in the procedure linkage table is reserved. */
2471 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2472
2473 /* Get the offset into the .got table of the entry that
407443a3 2474 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
fe4770f4 2475 bytes. The first three are reserved for the dynamic linker. */
70256ad8
AJ		 2476 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
2477
2478 /* Fill in the entry in the procedure linkage table. */
c434dee6 2479 memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry,
70256ad8
AJ		 2480 PLT_ENTRY_SIZE);
2481
2482 /* Insert the relocation positions of the plt section. The magic
2483 numbers at the end of the statements are the positions of the
2484 relocations in the plt section. */
653165cc
AJ		 2485 /* Put offset for jmp *name@GOTPCREL(%rip), since the
2486 instruction uses 6 bytes, subtract this value. */
2487 bfd_put_32 (output_bfd,
c434dee6
AJ		 2488 (htab->sgotplt->output_section->vma
2489 + htab->sgotplt->output_offset
653165cc 2490 + got_offset
c434dee6
AJ		 2491 - htab->splt->output_section->vma
2492 - htab->splt->output_offset
653165cc
AJ		 2493 - h->plt.offset
2494 - 6),
c434dee6 2495 htab->splt->contents + h->plt.offset + 2);
653165cc
AJ		 2496 /* Put relocation index. */
2497 bfd_put_32 (output_bfd, plt_index,
c434dee6 2498 htab->splt->contents + h->plt.offset + 7);
653165cc
AJ		 2499 /* Put offset for jmp .PLT0. */
2500 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
c434dee6 2501 htab->splt->contents + h->plt.offset + 12);
70256ad8 2502
653165cc
AJ		 2503 /* Fill in the entry in the global offset table, initially this
2504 points to the pushq instruction in the PLT which is at offset 6. */
c434dee6
AJ		 2505 bfd_put_64 (output_bfd, (htab->splt->output_section->vma
2506 + htab->splt->output_offset
70256ad8 2507 + h->plt.offset + 6),
c434dee6 2508 htab->sgotplt->contents + got_offset);
70256ad8
AJ		 2509
2510 /* Fill in the entry in the .rela.plt section. */
c434dee6
AJ		 2511 rela.r_offset = (htab->sgotplt->output_section->vma
2512 + htab->sgotplt->output_offset
70256ad8
AJ		 2513 + got_offset);
2514 rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT);
2515 rela.r_addend = 0;
947216bf 2516 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
c434dee6 2517 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
70256ad8
AJ		 2518
2519 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2520 {
2521 /* Mark the symbol as undefined, rather than as defined in
c434dee6
AJ		 2522 the .plt section. Leave the value alone. This is a clue
2523 for the dynamic linker, to make function pointer
2524 comparisons work between an application and shared
2525 library. */
70256ad8
AJ		 2526 sym->st_shndx = SHN_UNDEF;
2527 }
2528 }
2529
bffbf940
JJ		 2530 if (h->got.offset != (bfd_vma) -1
2531 && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_GD
2532 && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 2533 {
053579d7 2534 Elf_Internal_Rela rela;
947216bf 2535 bfd_byte *loc;
053579d7
AJ		 2536
2537 /* This symbol has an entry in the global offset table. Set it
bffbf940 2538 up. */
c434dee6
AJ		 2539 if (htab->sgot == NULL || htab->srelgot == NULL)
2540 abort ();
053579d7 2541
c434dee6
AJ		 2542 rela.r_offset = (htab->sgot->output_section->vma
2543 + htab->sgot->output_offset
dc810e39 2544 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ		 2545
2546 /* If this is a static link, or it is a -Bsymbolic link and the
2547 symbol is defined locally or was forced to be local because
2548 of a version file, we just want to emit a RELATIVE reloc.
2549 The entry in the global offset table will already have been
2550 initialized in the relocate_section function. */
c434dee6 2551 if (info->shared
27482721 2552 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 2553 {
cc78d0af 2554 BFD_ASSERT((h->got.offset & 1) != 0);
053579d7
AJ		 2555 rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
2556 rela.r_addend = (h->root.u.def.value
2557 + h->root.u.def.section->output_section->vma
2558 + h->root.u.def.section->output_offset);
2559 }
2560 else
2561 {
2562 BFD_ASSERT((h->got.offset & 1) == 0);
c434dee6
AJ		 2563 bfd_put_64 (output_bfd, (bfd_vma) 0,
2564 htab->sgot->contents + h->got.offset);
053579d7
AJ		 2565 rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT);
2566 rela.r_addend = 0;
2567 }
2568
947216bf
AM		 2569 loc = htab->srelgot->contents;
2570 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 2571 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
053579d7
AJ		 2572 }
2573
70256ad8
AJ		 2574 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2575 {
70256ad8 2576 Elf_Internal_Rela rela;
947216bf 2577 bfd_byte *loc;
70256ad8
AJ		 2578
2579 /* This symbol needs a copy reloc. Set it up. */
2580
c434dee6
AJ		 2581 if (h->dynindx == -1
2582 || (h->root.type != bfd_link_hash_defined
2583 && h->root.type != bfd_link_hash_defweak)
2584 || htab->srelbss == NULL)
2585 abort ();
70256ad8
AJ		 2586
2587 rela.r_offset = (h->root.u.def.value
2588 + h->root.u.def.section->output_section->vma
2589 + h->root.u.def.section->output_offset);
2590 rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY);
2591 rela.r_addend = 0;
947216bf
AM		 2592 loc = htab->srelbss->contents;
2593 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 2594 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
70256ad8
AJ		 2595 }
2596
2597 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2598 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2599 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2600 sym->st_shndx = SHN_ABS;
2601
b34976b6 2602 return TRUE;
70256ad8
AJ		 2603}
2604
c434dee6
AJ		 2605/* Used to decide how to sort relocs in an optimal manner for the
2606 dynamic linker, before writing them out. */
2607
2608static enum elf_reloc_type_class
27482721 2609elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
c434dee6
AJ		 2610{
2611 switch ((int) ELF64_R_TYPE (rela->r_info))
2612 {
2613 case R_X86_64_RELATIVE:
2614 return reloc_class_relative;
2615 case R_X86_64_JUMP_SLOT:
2616 return reloc_class_plt;
2617 case R_X86_64_COPY:
2618 return reloc_class_copy;
2619 default:
2620 return reloc_class_normal;
2621 }
2622}
2623
70256ad8
AJ		 2624/* Finish up the dynamic sections. */
2625
b34976b6 2626static bfd_boolean
27482721 2627elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
70256ad8 2628{
c434dee6 2629 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 2630 bfd *dynobj;
2631 asection *sdyn;
70256ad8 2632
c434dee6
AJ		 2633 htab = elf64_x86_64_hash_table (info);
2634 dynobj = htab->elf.dynobj;
70256ad8
AJ		 2635 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2636
c434dee6 2637 if (htab->elf.dynamic_sections_created)
70256ad8 2638 {
70256ad8
AJ		 2639 Elf64_External_Dyn *dyncon, *dynconend;
2640
c434dee6
AJ		 2641 if (sdyn == NULL || htab->sgot == NULL)
2642 abort ();
70256ad8
AJ		 2643
2644 dyncon = (Elf64_External_Dyn *) sdyn->contents;
2645 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2646 for (; dyncon < dynconend; dyncon++)
2647 {
2648 Elf_Internal_Dyn dyn;
70256ad8
AJ		 2649 asection *s;
2650
2651 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
2652
2653 switch (dyn.d_tag)
2654 {
2655 default:
053579d7 2656 continue;
70256ad8
AJ		 2657
2658 case DT_PLTGOT:
c434dee6
AJ		 2659 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
2660 break;
70256ad8
AJ		 2661
2662 case DT_JMPREL:
c434dee6
AJ		 2663 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
2664 break;
70256ad8 2665
c434dee6
AJ		 2666 case DT_PLTRELSZ:
2667 s = htab->srelplt->output_section;
2668 if (s->_cooked_size != 0)
2669 dyn.d_un.d_val = s->_cooked_size;
2670 else
2671 dyn.d_un.d_val = s->_raw_size;
70256ad8
AJ		 2672 break;
2673
2674 case DT_RELASZ:
c434dee6
AJ		 2675 /* The procedure linkage table relocs (DT_JMPREL) should
2676 not be included in the overall relocs (DT_RELA).
2677 Therefore, we override the DT_RELASZ entry here to
2678 make it not include the JMPREL relocs. Since the
2679 linker script arranges for .rela.plt to follow all
2680 other relocation sections, we don't have to worry
2681 about changing the DT_RELA entry. */
2682 if (htab->srelplt != NULL)
70256ad8 2683 {
c434dee6
AJ		 2684 s = htab->srelplt->output_section;
2685 if (s->_cooked_size != 0)
2686 dyn.d_un.d_val -= s->_cooked_size;
2687 else
2688 dyn.d_un.d_val -= s->_raw_size;
70256ad8
AJ		 2689 }
2690 break;
70256ad8 2691 }
c434dee6 2692
70256ad8
AJ		 2693 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2694 }
2695
c434dee6
AJ		 2696 /* Fill in the special first entry in the procedure linkage table. */
2697 if (htab->splt && htab->splt->_raw_size > 0)
70256ad8 2698 {
653165cc 2699 /* Fill in the first entry in the procedure linkage table. */
c434dee6
AJ		 2700 memcpy (htab->splt->contents, elf64_x86_64_plt0_entry,
2701 PLT_ENTRY_SIZE);
653165cc
AJ		 2702 /* Add offset for pushq GOT+8(%rip), since the instruction
2703 uses 6 bytes subtract this value. */
2704 bfd_put_32 (output_bfd,
c434dee6
AJ		 2705 (htab->sgotplt->output_section->vma
2706 + htab->sgotplt->output_offset
653165cc 2707 + 8
c434dee6
AJ		 2708 - htab->splt->output_section->vma
2709 - htab->splt->output_offset
653165cc 2710 - 6),
c434dee6 2711 htab->splt->contents + 2);
653165cc
AJ		 2712 /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to
2713 the end of the instruction. */
2714 bfd_put_32 (output_bfd,
c434dee6
AJ		 2715 (htab->sgotplt->output_section->vma
2716 + htab->sgotplt->output_offset
653165cc 2717 + 16
c434dee6
AJ		 2718 - htab->splt->output_section->vma
2719 - htab->splt->output_offset
653165cc 2720 - 12),
c434dee6 2721 htab->splt->contents + 8);
653165cc 2722
c434dee6
AJ		 2723 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize =
2724 PLT_ENTRY_SIZE;
70256ad8 2725 }
70256ad8
AJ		 2726 }
2727
c434dee6 2728 if (htab->sgotplt)
70256ad8 2729 {
c434dee6
AJ		 2730 /* Fill in the first three entries in the global offset table. */
2731 if (htab->sgotplt->_raw_size > 0)
2732 {
2733 /* Set the first entry in the global offset table to the address of
2734 the dynamic section. */
2735 if (sdyn == NULL)
2736 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents);
2737 else
2738 bfd_put_64 (output_bfd,
2739 sdyn->output_section->vma + sdyn->output_offset,
2740 htab->sgotplt->contents);
2741 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
2742 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE);
2743 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2);
2744 }
70256ad8 2745
c434dee6
AJ		 2746 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize =
2747 GOT_ENTRY_SIZE;
2748 }
70256ad8 2749
b34976b6 2750 return TRUE;
8d88c4ca
NC		 2751}
2752
8df9fc9d 2753
70256ad8
AJ		 2754#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
2755#define TARGET_LITTLE_NAME "elf64-x86-64"
2756#define ELF_ARCH bfd_arch_i386
2757#define ELF_MACHINE_CODE EM_X86_64
2758#define ELF_MAXPAGESIZE 0x100000
2759
2760#define elf_backend_can_gc_sections 1
51b64d56 2761#define elf_backend_can_refcount 1
70256ad8
AJ		 2762#define elf_backend_want_got_plt 1
2763#define elf_backend_plt_readonly 1
2764#define elf_backend_want_plt_sym 0
2765#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 2766#define elf_backend_rela_normal 1
70256ad8
AJ		 2767
2768#define elf_info_to_howto elf64_x86_64_info_to_howto
70256ad8 2769
70256ad8
AJ		 2770#define bfd_elf64_bfd_link_hash_table_create \
2771 elf64_x86_64_link_hash_table_create
407443a3 2772#define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup
70256ad8
AJ		 2773
2774#define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol
2775#define elf_backend_check_relocs elf64_x86_64_check_relocs
c434dee6
AJ		 2776#define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol
2777#define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections
2778#define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections
70256ad8
AJ		 2779#define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol
2780#define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook
2781#define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook
3bab7989
ML		 2782#define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus
2783#define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo
c434dee6 2784#define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class
70256ad8
AJ		 2785#define elf_backend_relocate_section elf64_x86_64_relocate_section
2786#define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections
407443a3 2787#define elf_backend_object_p elf64_x86_64_elf_object_p
bffbf940 2788#define bfd_elf64_mkobject elf64_x86_64_mkobject
8d88c4ca
NC		 2789
2790#include "elf64-target.h"
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