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[deliverable/binutils-gdb.git] / bfd / elf64-x86-64.c
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8d88c4ca 1/* X86-64 specific support for 64-bit ELF
ae9a127f 2 Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
8d88c4ca
NC		 3 Contributed by Jan Hubicka <jh@suse.cz>.
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
563 | ELF_LINK_HASH_REF_REGULAR_NONWEAK));
564 else
565 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
8d88c4ca
NC		 566}
567
b34976b6 568static bfd_boolean
27482721 569elf64_x86_64_mkobject (bfd *abfd)
8d88c4ca 570{
bffbf940
JJ		 571 bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata);
572 abfd->tdata.any = bfd_zalloc (abfd, amt);
573 if (abfd->tdata.any == NULL)
b34976b6
AM		 574 return FALSE;
575 return TRUE;
bffbf940
JJ		 576}
577
b34976b6 578static bfd_boolean
27482721 579elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940
JJ		 580{
581 /* Allocate our special target data. */
582 struct elf64_x86_64_obj_tdata *new_tdata;
583 bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata);
584 new_tdata = bfd_zalloc (abfd, amt);
585 if (new_tdata == NULL)
b34976b6 586 return FALSE;
bffbf940
JJ		 587 new_tdata->root = *abfd->tdata.elf_obj_data;
588 abfd->tdata.any = new_tdata;
8d88c4ca
NC		 589 /* Set the right machine number for an x86-64 elf64 file. */
590 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 591 return TRUE;
8d88c4ca
NC		 592}
593
bffbf940 594static int
27482721 595elf64_x86_64_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
bffbf940
JJ		 596{
597 if (info->shared)
598 return r_type;
599
600 switch (r_type)
601 {
602 case R_X86_64_TLSGD:
603 case R_X86_64_GOTTPOFF:
604 if (is_local)
605 return R_X86_64_TPOFF32;
606 return R_X86_64_GOTTPOFF;
607 case R_X86_64_TLSLD:
608 return R_X86_64_TPOFF32;
609 }
610
611 return r_type;
612}
613
70256ad8 614/* Look through the relocs for a section during the first phase, and
c434dee6
AJ		 615 calculate needed space in the global offset table, procedure
616 linkage table, and dynamic reloc sections. */
70256ad8 617
b34976b6 618static bfd_boolean
27482721
AJ		 619elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
620 const Elf_Internal_Rela *relocs)
70256ad8 621{
c434dee6 622 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 623 Elf_Internal_Shdr *symtab_hdr;
624 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ		 625 const Elf_Internal_Rela *rel;
626 const Elf_Internal_Rela *rel_end;
70256ad8
AJ		 627 asection *sreloc;
628
1049f94e 629 if (info->relocatable)
b34976b6 630 return TRUE;
70256ad8 631
c434dee6 632 htab = elf64_x86_64_hash_table (info);
70256ad8
AJ		 633 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
634 sym_hashes = elf_sym_hashes (abfd);
70256ad8 635
c434dee6
AJ		 636 sreloc = NULL;
637
70256ad8
AJ		 638 rel_end = relocs + sec->reloc_count;
639 for (rel = relocs; rel < rel_end; rel++)
640 {
bffbf940 641 unsigned int r_type;
70256ad8
AJ		 642 unsigned long r_symndx;
643 struct elf_link_hash_entry *h;
644
645 r_symndx = ELF64_R_SYM (rel->r_info);
bffbf940 646 r_type = ELF64_R_TYPE (rel->r_info);
c434dee6
AJ		 647
648 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
649 {
650 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
651 bfd_archive_filename (abfd),
652 r_symndx);
b34976b6 653 return FALSE;
c434dee6
AJ		 654 }
655
70256ad8
AJ		 656 if (r_symndx < symtab_hdr->sh_info)
657 h = NULL;
658 else
659 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
660
bffbf940
JJ		 661 r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL);
662 switch (r_type)
70256ad8 663 {
bffbf940
JJ		 664 case R_X86_64_TLSLD:
665 htab->tls_ld_got.refcount += 1;
666 goto create_got;
667
668 case R_X86_64_TPOFF32:
669 if (info->shared)
70256ad8 670 {
bffbf940
JJ		 671 (*_bfd_error_handler)
672 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
673 bfd_archive_filename (abfd),
674 x86_64_elf_howto_table[r_type].name);
675 bfd_set_error (bfd_error_bad_value);
b34976b6 676 return FALSE;
70256ad8 677 }
bffbf940 678 break;
c434dee6 679
bffbf940
JJ		 680 case R_X86_64_GOTTPOFF:
681 if (info->shared)
682 info->flags |= DF_STATIC_TLS;
683 /* Fall through */
70256ad8 684
bffbf940
JJ		 685 case R_X86_64_GOT32:
686 case R_X86_64_GOTPCREL:
687 case R_X86_64_TLSGD:
688 /* This symbol requires a global offset table entry. */
689 {
690 int tls_type, old_tls_type;
691
692 switch (r_type)
693 {
694 default: tls_type = GOT_NORMAL; break;
695 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
696 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
697 }
698
699 if (h != NULL)
700 {
701 h->got.refcount += 1;
702 old_tls_type = elf64_x86_64_hash_entry (h)->tls_type;
703 }
704 else
705 {
706 bfd_signed_vma *local_got_refcounts;
707
708 /* This is a global offset table entry for a local symbol. */
709 local_got_refcounts = elf_local_got_refcounts (abfd);
710 if (local_got_refcounts == NULL)
711 {
712 bfd_size_type size;
713
714 size = symtab_hdr->sh_info;
715 size *= sizeof (bfd_signed_vma) + sizeof (char);
716 local_got_refcounts = ((bfd_signed_vma *)
717 bfd_zalloc (abfd, size));
718 if (local_got_refcounts == NULL)
b34976b6 719 return FALSE;
bffbf940
JJ		 720 elf_local_got_refcounts (abfd) = local_got_refcounts;
721 elf64_x86_64_local_got_tls_type (abfd)
722 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
723 }
724 local_got_refcounts[r_symndx] += 1;
725 old_tls_type
726 = elf64_x86_64_local_got_tls_type (abfd) [r_symndx];
727 }
728
729 /* If a TLS symbol is accessed using IE at least once,
730 there is no point to use dynamic model for it. */
731 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
732 && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE))
733 {
734 if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD)
735 tls_type = old_tls_type;
736 else
737 {
738 (*_bfd_error_handler)
739 (_("%s: %s' accessed both as normal and thread local symbol"),
740 bfd_archive_filename (abfd),
741 h ? h->root.root.string : "<local>");
b34976b6 742 return FALSE;
bffbf940
JJ		 743 }
744 }
745
746 if (old_tls_type != tls_type)
747 {
748 if (h != NULL)
749 elf64_x86_64_hash_entry (h)->tls_type = tls_type;
750 else
751 elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
752 }
753 }
c434dee6
AJ		 754 /* Fall through */
755
756 //case R_X86_64_GOTPCREL:
bffbf940 757 create_got:
c434dee6
AJ		 758 if (htab->sgot == NULL)
759 {
760 if (htab->elf.dynobj == NULL)
761 htab->elf.dynobj = abfd;
762 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 763 return FALSE;
c434dee6 764 }
70256ad8
AJ		 765 break;
766
767 case R_X86_64_PLT32:
768 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ		 769 actually build the entry in adjust_dynamic_symbol,
770 because this might be a case of linking PIC code which is
771 never referenced by a dynamic object, in which case we
772 don't need to generate a procedure linkage table entry
773 after all. */
70256ad8
AJ		 774
775 /* If this is a local symbol, we resolve it directly without
407443a3 776 creating a procedure linkage table entry. */
70256ad8
AJ		 777 if (h == NULL)
778 continue;
779
cc78d0af 780 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
51b64d56 781 h->plt.refcount += 1;
70256ad8
AJ		 782 break;
783
cc78d0af
AJ		 784 case R_X86_64_8:
785 case R_X86_64_16:
70256ad8
AJ		 786 case R_X86_64_32:
787 case R_X86_64_32S:
1b71fb54
AJ		 788 /* Let's help debug shared library creation. These relocs
789 cannot be used in shared libs. Don't error out for
790 sections we don't care about, such as debug sections or
791 non-constant sections. */
792 if (info->shared
793 && (sec->flags & SEC_ALLOC) != 0
794 && (sec->flags & SEC_READONLY) != 0)
795 {
796 (*_bfd_error_handler)
797 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
798 bfd_archive_filename (abfd),
bffbf940 799 x86_64_elf_howto_table[r_type].name);
1b71fb54 800 bfd_set_error (bfd_error_bad_value);
b34976b6 801 return FALSE;
1b71fb54
AJ		 802 }
803 /* Fall through. */
804
c434dee6
AJ		 805 case R_X86_64_PC8:
806 case R_X86_64_PC16:
70256ad8 807 case R_X86_64_PC32:
1b71fb54 808 case R_X86_64_64:
c434dee6
AJ		 809 if (h != NULL && !info->shared)
810 {
811 /* If this reloc is in a read-only section, we might
812 need a copy reloc. We can't check reliably at this
813 stage whether the section is read-only, as input
814 sections have not yet been mapped to output sections.
815 Tentatively set the flag for now, and correct in
816 adjust_dynamic_symbol. */
817 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
818
819 /* We may need a .plt entry if the function this reloc
820 refers to is in a shared lib. */
821 h->plt.refcount += 1;
822 }
70256ad8
AJ		 823
824 /* If we are creating a shared library, and this is a reloc
825 against a global symbol, or a non PC relative reloc
826 against a local symbol, then we need to copy the reloc
827 into the shared library. However, if we are linking with
828 -Bsymbolic, we do not need to copy a reloc against a
829 global symbol which is defined in an object we are
407443a3 830 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ		 831 this point we have not seen all the input files, so it is
832 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ		 833 later (it is never cleared). In case of a weak definition,
834 DEF_REGULAR may be cleared later by a strong definition in
835 a shared library. We account for that possibility below by
836 storing information in the relocs_copied field of the hash
837 table entry. A similar situation occurs when creating
838 shared libraries and symbol visibility changes render the
839 symbol local.
840
841 If on the other hand, we are creating an executable, we
842 may need to keep relocations for symbols satisfied by a
843 dynamic library if we manage to avoid copy relocs for the
844 symbol. */
845 if ((info->shared
846 && (sec->flags & SEC_ALLOC) != 0
bffbf940
JJ		 847 && (((r_type != R_X86_64_PC8)
848 && (r_type != R_X86_64_PC16)
849 && (r_type != R_X86_64_PC32))
c434dee6
AJ		 850 || (h != NULL
851 && (! info->symbolic
852 || h->root.type == bfd_link_hash_defweak
853 || (h->elf_link_hash_flags
854 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
d40d037c
AJ		 855 || (ELIMINATE_COPY_RELOCS
856 && !info->shared
c434dee6
AJ		 857 && (sec->flags & SEC_ALLOC) != 0
858 && h != NULL
859 && (h->root.type == bfd_link_hash_defweak
860 || (h->elf_link_hash_flags
861 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
70256ad8 862 {
c434dee6
AJ		 863 struct elf64_x86_64_dyn_relocs *p;
864 struct elf64_x86_64_dyn_relocs **head;
865
866 /* We must copy these reloc types into the output file.
867 Create a reloc section in dynobj and make room for
868 this reloc. */
70256ad8
AJ		 869 if (sreloc == NULL)
870 {
871 const char *name;
c434dee6 872 bfd *dynobj;
70256ad8
AJ		 873
874 name = (bfd_elf_string_from_elf_section
875 (abfd,
876 elf_elfheader (abfd)->e_shstrndx,
877 elf_section_data (sec)->rel_hdr.sh_name));
878 if (name == NULL)
b34976b6 879 return FALSE;
70256ad8 880
c434dee6
AJ		 881 if (strncmp (name, ".rela", 5) != 0
882 || strcmp (bfd_get_section_name (abfd, sec),
883 name + 5) != 0)
884 {
885 (*_bfd_error_handler)
886 (_("%s: bad relocation section name `%s\'"),
887 bfd_archive_filename (abfd), name);
888 }
889
890 if (htab->elf.dynobj == NULL)
891 htab->elf.dynobj = abfd;
892
893 dynobj = htab->elf.dynobj;
70256ad8
AJ		 894
895 sreloc = bfd_get_section_by_name (dynobj, name);
896 if (sreloc == NULL)
897 {
898 flagword flags;
899
900 sreloc = bfd_make_section (dynobj, name);
901 flags = (SEC_HAS_CONTENTS | SEC_READONLY
902 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
903 if ((sec->flags & SEC_ALLOC) != 0)
904 flags |= SEC_ALLOC | SEC_LOAD;
905 if (sreloc == NULL
906 || ! bfd_set_section_flags (dynobj, sreloc, flags)
cc78d0af 907 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
b34976b6 908 return FALSE;
70256ad8 909 }
c434dee6 910 elf_section_data (sec)->sreloc = sreloc;
70256ad8
AJ		 911 }
912
c434dee6
AJ		 913 /* If this is a global symbol, we count the number of
914 relocations we need for this symbol. */
915 if (h != NULL)
70256ad8 916 {
c434dee6
AJ		 917 head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs;
918 }
919 else
920 {
921 /* Track dynamic relocs needed for local syms too.
922 We really need local syms available to do this
923 easily. Oh well. */
924
925 asection *s;
926 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
927 sec, r_symndx);
928 if (s == NULL)
b34976b6 929 return FALSE;
70256ad8 930
c434dee6
AJ		 931 head = ((struct elf64_x86_64_dyn_relocs **)
932 &elf_section_data (s)->local_dynrel);
933 }
70256ad8 934
c434dee6
AJ		 935 p = *head;
936 if (p == NULL || p->sec != sec)
937 {
938 bfd_size_type amt = sizeof *p;
939 p = ((struct elf64_x86_64_dyn_relocs *)
940 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 941 if (p == NULL)
b34976b6 942 return FALSE;
c434dee6
AJ		 943 p->next = *head;
944 *head = p;
945 p->sec = sec;
946 p->count = 0;
947 p->pc_count = 0;
70256ad8 948 }
c434dee6
AJ		 949
950 p->count += 1;
bffbf940
JJ		 951 if (r_type == R_X86_64_PC8
952 || r_type == R_X86_64_PC16
953 || r_type == R_X86_64_PC32)
c434dee6 954 p->pc_count += 1;
70256ad8
AJ		 955 }
956 break;
fe4770f4
AJ		 957
958 /* This relocation describes the C++ object vtable hierarchy.
959 Reconstruct it for later use during GC. */
960 case R_X86_64_GNU_VTINHERIT:
961 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 962 return FALSE;
fe4770f4
AJ		 963 break;
964
965 /* This relocation describes which C++ vtable entries are actually
966 used. Record for later use during GC. */
967 case R_X86_64_GNU_VTENTRY:
cc78d0af 968 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 969 return FALSE;
fe4770f4 970 break;
c434dee6
AJ		 971
972 default:
973 break;
70256ad8
AJ		 974 }
975 }
976
b34976b6 977 return TRUE;
70256ad8
AJ		 978}
979
980/* Return the section that should be marked against GC for a given
407443a3 981 relocation. */
70256ad8
AJ		 982
983static asection *
27482721
AJ		 984elf64_x86_64_gc_mark_hook (asection *sec,
985 struct bfd_link_info *info ATTRIBUTE_UNUSED,
986 Elf_Internal_Rela *rel,
987 struct elf_link_hash_entry *h,
988 Elf_Internal_Sym *sym)
70256ad8
AJ		 989{
990 if (h != NULL)
991 {
fe4770f4 992 switch (ELF64_R_TYPE (rel->r_info))
70256ad8 993 {
fe4770f4
AJ		 994 case R_X86_64_GNU_VTINHERIT:
995 case R_X86_64_GNU_VTENTRY:
996 break;
70256ad8
AJ		 997
998 default:
fe4770f4
AJ		 999 switch (h->root.type)
1000 {
1001 case bfd_link_hash_defined:
1002 case bfd_link_hash_defweak:
1003 return h->root.u.def.section;
1004
1005 case bfd_link_hash_common:
1006 return h->root.u.c.p->section;
1007
1008 default:
1009 break;
1010 }
70256ad8
AJ		 1011 }
1012 }
1013 else
1e2f5b6e 1014 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
70256ad8
AJ		 1015
1016 return NULL;
1017}
1018
407443a3 1019/* Update the got entry reference counts for the section being removed. */
70256ad8 1020
b34976b6 1021static bfd_boolean
27482721
AJ		 1022elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
1023 asection *sec, const Elf_Internal_Rela *relocs)
70256ad8
AJ		 1024{
1025 Elf_Internal_Shdr *symtab_hdr;
1026 struct elf_link_hash_entry **sym_hashes;
1027 bfd_signed_vma *local_got_refcounts;
1028 const Elf_Internal_Rela *rel, *relend;
c434dee6
AJ		 1029
1030 elf_section_data (sec)->local_dynrel = NULL;
70256ad8
AJ		 1031
1032 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1033 sym_hashes = elf_sym_hashes (abfd);
1034 local_got_refcounts = elf_local_got_refcounts (abfd);
1035
70256ad8
AJ		 1036 relend = relocs + sec->reloc_count;
1037 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 1038 {
1039 unsigned long r_symndx;
1040 unsigned int r_type;
1041 struct elf_link_hash_entry *h = NULL;
70256ad8 1042
26e41594
AM		 1043 r_symndx = ELF64_R_SYM (rel->r_info);
1044 if (r_symndx >= symtab_hdr->sh_info)
1045 {
1046 struct elf64_x86_64_link_hash_entry *eh;
1047 struct elf64_x86_64_dyn_relocs **pp;
1048 struct elf64_x86_64_dyn_relocs *p;
c434dee6 1049
26e41594
AM		 1050 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1051 eh = (struct elf64_x86_64_link_hash_entry *) h;
c434dee6 1052
26e41594
AM		 1053 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1054 if (p->sec == sec)
1055 {
1056 /* Everything must go for SEC. */
1057 *pp = p->next;
1058 break;
1059 }
1060 }
c434dee6 1061
26e41594
AM		 1062 r_type = ELF64_R_TYPE (rel->r_info);
1063 r_type = elf64_x86_64_tls_transition (info, r_type, h != NULL);
1064 switch (r_type)
1065 {
1066 case R_X86_64_TLSLD:
1067 if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0)
1068 elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1;
1069 break;
c434dee6 1070
26e41594
AM		 1071 case R_X86_64_TLSGD:
1072 case R_X86_64_GOTTPOFF:
1073 case R_X86_64_GOT32:
1074 case R_X86_64_GOTPCREL:
1075 if (h != NULL)
1076 {
1077 if (h->got.refcount > 0)
1078 h->got.refcount -= 1;
1079 }
1080 else if (local_got_refcounts != NULL)
1081 {
1082 if (local_got_refcounts[r_symndx] > 0)
1083 local_got_refcounts[r_symndx] -= 1;
1084 }
1085 break;
c434dee6 1086
26e41594
AM		 1087 case R_X86_64_8:
1088 case R_X86_64_16:
1089 case R_X86_64_32:
1090 case R_X86_64_64:
1091 case R_X86_64_32S:
1092 case R_X86_64_PC8:
1093 case R_X86_64_PC16:
1094 case R_X86_64_PC32:
1095 if (info->shared)
1096 break;
1097 /* Fall thru */
c434dee6 1098
26e41594
AM		 1099 case R_X86_64_PLT32:
1100 if (h != NULL)
1101 {
1102 if (h->plt.refcount > 0)
1103 h->plt.refcount -= 1;
1104 }
1105 break;
70256ad8 1106
26e41594
AM		 1107 default:
1108 break;
1109 }
1110 }
70256ad8 1111
b34976b6 1112 return TRUE;
70256ad8
AJ		 1113}
1114
1115/* Adjust a symbol defined by a dynamic object and referenced by a
1116 regular object. The current definition is in some section of the
1117 dynamic object, but we're not including those sections. We have to
1118 change the definition to something the rest of the link can
407443a3 1119 understand. */
70256ad8 1120
b34976b6 1121static bfd_boolean
27482721
AJ		 1122elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
1123 struct elf_link_hash_entry *h)
70256ad8 1124{
c434dee6 1125 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 1126 asection *s;
1127 unsigned int power_of_two;
1128
70256ad8
AJ		 1129 /* If this is a function, put it in the procedure linkage table. We
1130 will fill in the contents of the procedure linkage table later,
1131 when we know the address of the .got section. */
1132 if (h->type == STT_FUNC
1133 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1134 {
c434dee6 1135 if (h->plt.refcount <= 0
27482721
AJ		 1136 || SYMBOL_CALLS_LOCAL (info, h)
1137 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1138 && h->root.type == bfd_link_hash_undefweak))
70256ad8 1139 {
70256ad8
AJ		 1140 /* This case can occur if we saw a PLT32 reloc in an input
1141 file, but the symbol was never referred to by a dynamic
1142 object, or if all references were garbage collected. In
1143 such a case, we don't actually need to build a procedure
1144 linkage table, and we can just do a PC32 reloc instead. */
70256ad8
AJ		 1145 h->plt.offset = (bfd_vma) -1;
1146 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
70256ad8
AJ		 1147 }
1148
b34976b6 1149 return TRUE;
70256ad8 1150 }
bbd7ec4a 1151 else
c434dee6
AJ		 1152 /* It's possible that we incorrectly decided a .plt reloc was
1153 needed for an R_X86_64_PC32 reloc to a non-function sym in
1154 check_relocs. We can't decide accurately between function and
1155 non-function syms in check-relocs; Objects loaded later in
1156 the link may change h->type. So fix it now. */
bbd7ec4a 1157 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ		 1158
1159 /* If this is a weak symbol, and there is a real definition, the
1160 processor independent code will have arranged for us to see the
407443a3 1161 real definition first, and we can just use the same value. */
70256ad8
AJ		 1162 if (h->weakdef != NULL)
1163 {
1164 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1165 || h->weakdef->root.type == bfd_link_hash_defweak);
1166 h->root.u.def.section = h->weakdef->root.u.def.section;
1167 h->root.u.def.value = h->weakdef->root.u.def.value;
d40d037c
AJ		 1168 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1169 h->elf_link_hash_flags
1170 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1171 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
b34976b6 1172 return TRUE;
70256ad8
AJ		 1173 }
1174
1175 /* This is a reference to a symbol defined by a dynamic object which
407443a3 1176 is not a function. */
70256ad8
AJ		 1177
1178 /* If we are creating a shared library, we must presume that the
1179 only references to the symbol are via the global offset table.
1180 For such cases we need not do anything here; the relocations will
407443a3 1181 be handled correctly by relocate_section. */
70256ad8 1182 if (info->shared)
b34976b6 1183 return TRUE;
70256ad8
AJ		 1184
1185 /* If there are no references to this symbol that do not use the
1186 GOT, we don't need to generate a copy reloc. */
1187 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
b34976b6 1188 return TRUE;
70256ad8 1189
c434dee6
AJ		 1190 /* If -z nocopyreloc was given, we won't generate them either. */
1191 if (info->nocopyreloc)
1192 {
1193 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
b34976b6 1194 return TRUE;
c434dee6
AJ		 1195 }
1196
d40d037c 1197 if (ELIMINATE_COPY_RELOCS)
c434dee6 1198 {
d40d037c
AJ		 1199 struct elf64_x86_64_link_hash_entry * eh;
1200 struct elf64_x86_64_dyn_relocs *p;
c434dee6 1201
d40d037c
AJ		 1202 eh = (struct elf64_x86_64_link_hash_entry *) h;
1203 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1204 {
1205 s = p->sec->output_section;
1206 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1207 break;
1208 }
1209
1210 /* If we didn't find any dynamic relocs in read-only sections, then
1211 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1212 if (p == NULL)
1213 {
1214 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1215 return TRUE;
1216 }
c434dee6
AJ		 1217 }
1218
70256ad8 1219 /* We must allocate the symbol in our .dynbss section, which will
407443a3 1220 become part of the .bss section of the executable. There will be
70256ad8
AJ		 1221 an entry for this symbol in the .dynsym section. The dynamic
1222 object will contain position independent code, so all references
1223 from the dynamic object to this symbol will go through the global
1224 offset table. The dynamic linker will use the .dynsym entry to
1225 determine the address it must put in the global offset table, so
1226 both the dynamic object and the regular object will refer to the
1227 same memory location for the variable. */
1228
c434dee6 1229 htab = elf64_x86_64_hash_table (info);
70256ad8
AJ		 1230
1231 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
1232 to copy the initial value out of the dynamic object and into the
cedb70c5 1233 runtime process image. */
70256ad8
AJ		 1234 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1235 {
c434dee6 1236 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
70256ad8
AJ		 1237 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1238 }
1239
1240 /* We need to figure out the alignment required for this symbol. I
407443a3 1241 have no idea how ELF linkers handle this. 16-bytes is the size
70256ad8
AJ		 1242 of the largest type that requires hard alignment -- long double. */
1243 /* FIXME: This is VERY ugly. Should be fixed for all architectures using
1244 this construct. */
1245 power_of_two = bfd_log2 (h->size);
1246 if (power_of_two > 4)
1247 power_of_two = 4;
1248
1249 /* Apply the required alignment. */
c434dee6 1250 s = htab->sdynbss;
70256ad8 1251 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
c434dee6 1252 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
70256ad8 1253 {
c434dee6 1254 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
b34976b6 1255 return FALSE;
70256ad8
AJ		 1256 }
1257
1258 /* Define the symbol as being at this point in the section. */
1259 h->root.u.def.section = s;
1260 h->root.u.def.value = s->_raw_size;
1261
1262 /* Increment the section size to make room for the symbol. */
1263 s->_raw_size += h->size;
1264
b34976b6 1265 return TRUE;
70256ad8
AJ		 1266}
1267
c434dee6
AJ		 1268/* This is the condition under which elf64_x86_64_finish_dynamic_symbol
1269 will be called from elflink.h. If elflink.h doesn't call our
1270 finish_dynamic_symbol routine, we'll need to do something about
1271 initializing any .plt and .got entries in elf64_x86_64_relocate_section. */
27482721 1272#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
c434dee6 1273 ((DYN) \
27482721 1274 && ((SHARED) \
c434dee6
AJ		 1275 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1276 && ((H)->dynindx != -1 \
1277 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1278
1279/* Allocate space in .plt, .got and associated reloc sections for
1280 dynamic relocs. */
1281
b34976b6 1282static bfd_boolean
27482721 1283allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 1284{
1285 struct bfd_link_info *info;
1286 struct elf64_x86_64_link_hash_table *htab;
1287 struct elf64_x86_64_link_hash_entry *eh;
1288 struct elf64_x86_64_dyn_relocs *p;
1289
e92d460e 1290 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1291 return TRUE;
c434dee6 1292
e92d460e
AM		 1293 if (h->root.type == bfd_link_hash_warning)
1294 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1295
c434dee6
AJ		 1296 info = (struct bfd_link_info *) inf;
1297 htab = elf64_x86_64_hash_table (info);
1298
1299 if (htab->elf.dynamic_sections_created
27482721 1300 && h->plt.refcount > 0)
c434dee6
AJ		 1301 {
1302 /* Make sure this symbol is output as a dynamic symbol.
1303 Undefined weak syms won't yet be marked as dynamic. */
1304 if (h->dynindx == -1
1305 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1306 {
1307 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
b34976b6 1308 return FALSE;
c434dee6
AJ		 1309 }
1310
27482721
AJ		 1311 if (info->shared
1312 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6
AJ		 1313 {
1314 asection *s = htab->splt;
1315
1316 /* If this is the first .plt entry, make room for the special
1317 first entry. */
1318 if (s->_raw_size == 0)
1319 s->_raw_size += PLT_ENTRY_SIZE;
1320
1321 h->plt.offset = s->_raw_size;
1322
1323 /* If this symbol is not defined in a regular file, and we are
1324 not generating a shared library, then set the symbol to this
1325 location in the .plt. This is required to make function
1326 pointers compare as equal between the normal executable and
1327 the shared library. */
1328 if (! info->shared
1329 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1330 {
1331 h->root.u.def.section = s;
1332 h->root.u.def.value = h->plt.offset;
1333 }
1334
1335 /* Make room for this entry. */
1336 s->_raw_size += PLT_ENTRY_SIZE;
1337
1338 /* We also need to make an entry in the .got.plt section, which
1339 will be placed in the .got section by the linker script. */
1340 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1341
1342 /* We also need to make an entry in the .rela.plt section. */
1343 htab->srelplt->_raw_size += sizeof (Elf64_External_Rela);
1344 }
1345 else
1346 {
1347 h->plt.offset = (bfd_vma) -1;
1348 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1349 }
1350 }
1351 else
1352 {
1353 h->plt.offset = (bfd_vma) -1;
1354 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1355 }
1356
bffbf940
JJ		 1357 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
1358 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
1359 if (h->got.refcount > 0
1360 && !info->shared
1361 && h->dynindx == -1
1362 && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
1363 h->got.offset = (bfd_vma) -1;
1364 else if (h->got.refcount > 0)
c434dee6
AJ		 1365 {
1366 asection *s;
b34976b6 1367 bfd_boolean dyn;
bffbf940 1368 int tls_type = elf64_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ		 1369
1370 /* Make sure this symbol is output as a dynamic symbol.
1371 Undefined weak syms won't yet be marked as dynamic. */
1372 if (h->dynindx == -1
1373 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1374 {
1375 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
b34976b6 1376 return FALSE;
c434dee6
AJ		 1377 }
1378
1379 s = htab->sgot;
1380 h->got.offset = s->_raw_size;
1381 s->_raw_size += GOT_ENTRY_SIZE;
bffbf940
JJ		 1382 /* R_X86_64_TLSGD needs 2 consecutive GOT slots. */
1383 if (tls_type == GOT_TLS_GD)
1384 s->_raw_size += GOT_ENTRY_SIZE;
c434dee6 1385 dyn = htab->elf.dynamic_sections_created;
bffbf940
JJ		 1386 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
1387 and two if global.
1388 R_X86_64_GOTTPOFF needs one dynamic relocation. */
1389 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1390 || tls_type == GOT_TLS_IE)
1391 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1392 else if (tls_type == GOT_TLS_GD)
1393 htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela);
4bc6e03a
AJ		 1394 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1395 || h->root.type != bfd_link_hash_undefweak)
27482721
AJ		 1396 && (info->shared
1397 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
c434dee6
AJ		 1398 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1399 }
1400 else
1401 h->got.offset = (bfd_vma) -1;
1402
1403 eh = (struct elf64_x86_64_link_hash_entry *) h;
1404 if (eh->dyn_relocs == NULL)
b34976b6 1405 return TRUE;
c434dee6
AJ		 1406
1407 /* In the shared -Bsymbolic case, discard space allocated for
1408 dynamic pc-relative relocs against symbols which turn out to be
1409 defined in regular objects. For the normal shared case, discard
1410 space for pc-relative relocs that have become local due to symbol
1411 visibility changes. */
1412
1413 if (info->shared)
1414 {
27482721
AJ		 1415 /* Relocs that use pc_count are those that appear on a call
1416 insn, or certain REL relocs that can generated via assembly.
1417 We want calls to protected symbols to resolve directly to the
1418 function rather than going via the plt. If people want
1419 function pointer comparisons to work as expected then they
1420 should avoid writing weird assembly. */
1421 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6
AJ		 1422 {
1423 struct elf64_x86_64_dyn_relocs **pp;
1424
1425 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1426 {
1427 p->count -= p->pc_count;
1428 p->pc_count = 0;
1429 if (p->count == 0)
1430 *pp = p->next;
1431 else
1432 pp = &p->next;
1433 }
1434 }
4e795f50
AM		 1435
1436 /* Also discard relocs on undefined weak syms with non-default
1437 visibility. */
1438 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1439 && h->root.type == bfd_link_hash_undefweak)
1440 eh->dyn_relocs = NULL;
c434dee6 1441 }
d40d037c 1442 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ		 1443 {
1444 /* For the non-shared case, discard space for relocs against
1445 symbols which turn out to need copy relocs or are not
1446 dynamic. */
1447
1448 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1449 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1450 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1451 || (htab->elf.dynamic_sections_created
1452 && (h->root.type == bfd_link_hash_undefweak
1453 || h->root.type == bfd_link_hash_undefined))))
1454 {
1455 /* Make sure this symbol is output as a dynamic symbol.
1456 Undefined weak syms won't yet be marked as dynamic. */
1457 if (h->dynindx == -1
1458 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1459 {
1460 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
b34976b6 1461 return FALSE;
c434dee6
AJ		 1462 }
1463
1464 /* If that succeeded, we know we'll be keeping all the
1465 relocs. */
1466 if (h->dynindx != -1)
1467 goto keep;
1468 }
1469
1470 eh->dyn_relocs = NULL;
1471
1472 keep: ;
1473 }
1474
1475 /* Finally, allocate space. */
1476 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1477 {
1478 asection *sreloc = elf_section_data (p->sec)->sreloc;
1479 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
1480 }
1481
b34976b6 1482 return TRUE;
c434dee6
AJ		 1483}
1484
1485/* Find any dynamic relocs that apply to read-only sections. */
1486
b34976b6 1487static bfd_boolean
27482721 1488readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 1489{
1490 struct elf64_x86_64_link_hash_entry *eh;
1491 struct elf64_x86_64_dyn_relocs *p;
1492
e92d460e
AM		 1493 if (h->root.type == bfd_link_hash_warning)
1494 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1495
c434dee6
AJ		 1496 eh = (struct elf64_x86_64_link_hash_entry *) h;
1497 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1498 {
1499 asection *s = p->sec->output_section;
1500
1501 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1502 {
1503 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1504
1505 info->flags |= DF_TEXTREL;
1506
1507 /* Not an error, just cut short the traversal. */
b34976b6 1508 return FALSE;
c434dee6
AJ		 1509 }
1510 }
b34976b6 1511 return TRUE;
c434dee6
AJ		 1512}
1513
70256ad8
AJ		 1514/* Set the sizes of the dynamic sections. */
1515
b34976b6 1516static bfd_boolean
27482721
AJ		 1517elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1518 struct bfd_link_info *info)
70256ad8 1519{
c434dee6 1520 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 1521 bfd *dynobj;
1522 asection *s;
b34976b6 1523 bfd_boolean relocs;
c434dee6 1524 bfd *ibfd;
70256ad8 1525
c434dee6
AJ		 1526 htab = elf64_x86_64_hash_table (info);
1527 dynobj = htab->elf.dynobj;
1528 if (dynobj == NULL)
1529 abort ();
70256ad8 1530
c434dee6 1531 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 1532 {
1533 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 1534 if (info->executable)
70256ad8
AJ		 1535 {
1536 s = bfd_get_section_by_name (dynobj, ".interp");
c434dee6
AJ		 1537 if (s == NULL)
1538 abort ();
70256ad8
AJ		 1539 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1540 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1541 }
1542 }
70256ad8 1543
c434dee6
AJ		 1544 /* Set up .got offsets for local syms, and space for local dynamic
1545 relocs. */
1546 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
70256ad8 1547 {
c434dee6
AJ		 1548 bfd_signed_vma *local_got;
1549 bfd_signed_vma *end_local_got;
bffbf940 1550 char *local_tls_type;
c434dee6
AJ		 1551 bfd_size_type locsymcount;
1552 Elf_Internal_Shdr *symtab_hdr;
1553 asection *srel;
70256ad8 1554
c434dee6 1555 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
70256ad8
AJ		 1556 continue;
1557
c434dee6 1558 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 1559 {
c434dee6
AJ		 1560 struct elf64_x86_64_dyn_relocs *p;
1561
1562 for (p = *((struct elf64_x86_64_dyn_relocs **)
1563 &elf_section_data (s)->local_dynrel);
1564 p != NULL;
1565 p = p->next)
70256ad8 1566 {
c434dee6
AJ		 1567 if (!bfd_is_abs_section (p->sec)
1568 && bfd_is_abs_section (p->sec->output_section))
1569 {
1570 /* Input section has been discarded, either because
1571 it is a copy of a linkonce section or due to
1572 linker script /DISCARD/, so we'll be discarding
1573 the relocs too. */
1574 }
1575 else if (p->count != 0)
1576 {
1577 srel = elf_section_data (p->sec)->sreloc;
1578 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
1579 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1580 info->flags |= DF_TEXTREL;
1581
1582 }
70256ad8
AJ		 1583 }
1584 }
c434dee6
AJ		 1585
1586 local_got = elf_local_got_refcounts (ibfd);
1587 if (!local_got)
1588 continue;
1589
1590 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1591 locsymcount = symtab_hdr->sh_info;
1592 end_local_got = local_got + locsymcount;
bffbf940 1593 local_tls_type = elf64_x86_64_local_got_tls_type (ibfd);
c434dee6
AJ		 1594 s = htab->sgot;
1595 srel = htab->srelgot;
bffbf940 1596 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
70256ad8 1597 {
c434dee6 1598 if (*local_got > 0)
70256ad8 1599 {
c434dee6
AJ		 1600 *local_got = s->_raw_size;
1601 s->_raw_size += GOT_ENTRY_SIZE;
bffbf940
JJ		 1602 if (*local_tls_type == GOT_TLS_GD)
1603 s->_raw_size += GOT_ENTRY_SIZE;
1604 if (info->shared
1605 || *local_tls_type == GOT_TLS_GD
1606 || *local_tls_type == GOT_TLS_IE)
c434dee6 1607 srel->_raw_size += sizeof (Elf64_External_Rela);
70256ad8
AJ		 1608 }
1609 else
c434dee6
AJ		 1610 *local_got = (bfd_vma) -1;
1611 }
1612 }
70256ad8 1613
bffbf940
JJ		 1614 if (htab->tls_ld_got.refcount > 0)
1615 {
1616 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
1617 relocs. */
1618 htab->tls_ld_got.offset = htab->sgot->_raw_size;
1619 htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
1620 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1621 }
1622 else
1623 htab->tls_ld_got.offset = -1;
1624
c434dee6
AJ		 1625 /* Allocate global sym .plt and .got entries, and space for global
1626 sym dynamic relocs. */
1627 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1628
1629 /* We now have determined the sizes of the various dynamic sections.
1630 Allocate memory for them. */
b34976b6 1631 relocs = FALSE;
c434dee6
AJ		 1632 for (s = dynobj->sections; s != NULL; s = s->next)
1633 {
1634 if ((s->flags & SEC_LINKER_CREATED) == 0)
1635 continue;
1636
1637 if (s == htab->splt
1638 || s == htab->sgot
1639 || s == htab->sgotplt)
1640 {
1641 /* Strip this section if we don't need it; see the
1642 comment below. */
1643 }
1644 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
1645 {
1646 if (s->_raw_size != 0 && s != htab->srelplt)
b34976b6 1647 relocs = TRUE;
c434dee6
AJ		 1648
1649 /* We use the reloc_count field as a counter if we need
1650 to copy relocs into the output file. */
1651 s->reloc_count = 0;
70256ad8 1652 }
c434dee6 1653 else
70256ad8
AJ		 1654 {
1655 /* It's not one of our sections, so don't allocate space. */
1656 continue;
1657 }
1658
c434dee6 1659 if (s->_raw_size == 0)
70256ad8 1660 {
c434dee6
AJ		 1661 /* If we don't need this section, strip it from the
1662 output file. This is mostly to handle .rela.bss and
1663 .rela.plt. We must create both sections in
1664 create_dynamic_sections, because they must be created
1665 before the linker maps input sections to output
1666 sections. The linker does that before
1667 adjust_dynamic_symbol is called, and it is that
1668 function which decides whether anything needs to go
1669 into these sections. */
1670
70256ad8
AJ		 1671 _bfd_strip_section_from_output (info, s);
1672 continue;
1673 }
1674
1675 /* Allocate memory for the section contents. We use bfd_zalloc
1676 here in case unused entries are not reclaimed before the
1677 section's contents are written out. This should not happen,
1678 but this way if it does, we get a R_X86_64_NONE reloc instead
1679 of garbage. */
1680 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
c434dee6 1681 if (s->contents == NULL)
b34976b6 1682 return FALSE;
70256ad8
AJ		 1683 }
1684
c434dee6 1685 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 1686 {
1687 /* Add some entries to the .dynamic section. We fill in the
1688 values later, in elf64_x86_64_finish_dynamic_sections, but we
1689 must add the entries now so that we get the correct size for
407443a3 1690 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 1691 dynamic linker and used by the debugger. */
dc810e39
AM		 1692#define add_dynamic_entry(TAG, VAL) \
1693 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1694
36af4a4e 1695 if (info->executable)
70256ad8 1696 {
dc810e39 1697 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 1698 return FALSE;
70256ad8
AJ		 1699 }
1700
c434dee6 1701 if (htab->splt->_raw_size != 0)
70256ad8 1702 {
dc810e39
AM		 1703 if (!add_dynamic_entry (DT_PLTGOT, 0)
1704 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1705 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1706 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 1707 return FALSE;
70256ad8
AJ		 1708 }
1709
1710 if (relocs)
1711 {
dc810e39
AM		 1712 if (!add_dynamic_entry (DT_RELA, 0)
1713 || !add_dynamic_entry (DT_RELASZ, 0)
1714 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
b34976b6 1715 return FALSE;
70256ad8 1716
c434dee6
AJ		 1717 /* If any dynamic relocs apply to a read-only section,
1718 then we need a DT_TEXTREL entry. */
1719 if ((info->flags & DF_TEXTREL) == 0)
1720 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1721 (PTR) info);
1722
1723 if ((info->flags & DF_TEXTREL) != 0)
1724 {
1725 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 1726 return FALSE;
c434dee6 1727 }
70256ad8
AJ		 1728 }
1729 }
dc810e39 1730#undef add_dynamic_entry
70256ad8 1731
b34976b6 1732 return TRUE;
70256ad8
AJ		 1733}
1734
bffbf940
JJ		 1735/* Return the base VMA address which should be subtracted from real addresses
1736 when resolving @dtpoff relocation.
1737 This is PT_TLS segment p_vaddr. */
1738
1739static bfd_vma
27482721 1740dtpoff_base (struct bfd_link_info *info)
bffbf940
JJ		 1741{
1742 /* If tls_segment is NULL, we should have signalled an error already. */
1743 if (elf_hash_table (info)->tls_segment == NULL)
1744 return 0;
1745 return elf_hash_table (info)->tls_segment->start;
1746}
1747
1748/* Return the relocation value for @tpoff relocation
1749 if STT_TLS virtual address is ADDRESS. */
1750
1751static bfd_vma
27482721 1752tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940
JJ		 1753{
1754 struct elf_link_tls_segment *tls_segment
1755 = elf_hash_table (info)->tls_segment;
1756
1757 /* If tls_segment is NULL, we should have signalled an error already. */
1758 if (tls_segment == NULL)
1759 return 0;
1760 return address - align_power (tls_segment->size, tls_segment->align)
1761 - tls_segment->start;
1762}
1763
8d88c4ca
NC		 1764/* Relocate an x86_64 ELF section. */
1765
b34976b6 1766static bfd_boolean
27482721
AJ		 1767elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
1768 bfd *input_bfd, asection *input_section,
1769 bfd_byte *contents, Elf_Internal_Rela *relocs,
1770 Elf_Internal_Sym *local_syms,
1771 asection **local_sections)
8d88c4ca 1772{
c434dee6 1773 struct elf64_x86_64_link_hash_table *htab;
8d88c4ca
NC		 1774 Elf_Internal_Shdr *symtab_hdr;
1775 struct elf_link_hash_entry **sym_hashes;
1776 bfd_vma *local_got_offsets;
c434dee6 1777 Elf_Internal_Rela *rel;
8d88c4ca
NC		 1778 Elf_Internal_Rela *relend;
1779
1049f94e 1780 if (info->relocatable)
b34976b6 1781 return TRUE;
b491616a 1782
c434dee6 1783 htab = elf64_x86_64_hash_table (info);
8d88c4ca
NC		 1784 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1785 sym_hashes = elf_sym_hashes (input_bfd);
1786 local_got_offsets = elf_local_got_offsets (input_bfd);
1787
c434dee6 1788 rel = relocs;
8d88c4ca 1789 relend = relocs + input_section->reloc_count;
c434dee6 1790 for (; rel < relend; rel++)
8d88c4ca 1791 {
bffbf940 1792 unsigned int r_type;
8d88c4ca
NC		 1793 reloc_howto_type *howto;
1794 unsigned long r_symndx;
1795 struct elf_link_hash_entry *h;
1796 Elf_Internal_Sym *sym;
1797 asection *sec;
c434dee6 1798 bfd_vma off;
8d88c4ca 1799 bfd_vma relocation;
b34976b6 1800 bfd_boolean unresolved_reloc;
8d88c4ca 1801 bfd_reloc_status_type r;
bffbf940 1802 int tls_type;
8d88c4ca 1803
c434dee6 1804 r_type = ELF64_R_TYPE (rel->r_info);
fe4770f4
AJ		 1805 if (r_type == (int) R_X86_64_GNU_VTINHERIT
1806 || r_type == (int) R_X86_64_GNU_VTENTRY)
1807 continue;
8d88c4ca 1808
bffbf940 1809 if (r_type >= R_X86_64_max)
8da6118f
KH		 1810 {
1811 bfd_set_error (bfd_error_bad_value);
b34976b6 1812 return FALSE;
8da6118f 1813 }
8d88c4ca 1814
b491616a 1815 howto = x86_64_elf_howto_table + r_type;
c434dee6 1816 r_symndx = ELF64_R_SYM (rel->r_info);
8d88c4ca
NC		 1817 h = NULL;
1818 sym = NULL;
1819 sec = NULL;
b34976b6 1820 unresolved_reloc = FALSE;
8d88c4ca 1821 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH		 1822 {
1823 sym = local_syms + r_symndx;
1824 sec = local_sections[r_symndx];
c434dee6
AJ		 1825
1826 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
8da6118f 1827 }
8d88c4ca 1828 else
8da6118f 1829 {
560e09e9 1830 bfd_boolean warned;
c434dee6 1831
560e09e9
NC		 1832 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
1833 symtab_hdr, relocation, sec,
1834 unresolved_reloc, info,
1835 warned);
8da6118f 1836 }
70256ad8
AJ		 1837 /* When generating a shared object, the relocations handled here are
1838 copied into the output file to be resolved at run time. */
1839 switch (r_type)
1840 {
1841 case R_X86_64_GOT32:
1842 /* Relocation is to the entry for this symbol in the global
1843 offset table. */
70256ad8
AJ		 1844 case R_X86_64_GOTPCREL:
1845 /* Use global offset table as symbol value. */
c434dee6
AJ		 1846 if (htab->sgot == NULL)
1847 abort ();
053579d7 1848
51e0a107 1849 if (h != NULL)
70256ad8 1850 {
b34976b6 1851 bfd_boolean dyn;
c434dee6
AJ		 1852
1853 off = h->got.offset;
1854 dyn = htab->elf.dynamic_sections_created;
51e0a107 1855
27482721 1856 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
51e0a107 1857 || (info->shared
27482721 1858 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ		 1859 || (ELF_ST_VISIBILITY (h->other)
1860 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH		 1861 {
1862 /* This is actually a static link, or it is a -Bsymbolic
1863 link and the symbol is defined locally, or the symbol
407443a3 1864 was forced to be local because of a version file. We
51e0a107
JH		 1865 must initialize this entry in the global offset table.
1866 Since the offset must always be a multiple of 8, we
1867 use the least significant bit to record whether we
1868 have initialized it already.
1869
1870 When doing a dynamic link, we create a .rela.got
407443a3
AJ		 1871 relocation entry to initialize the value. This is
1872 done in the finish_dynamic_symbol routine. */
51e0a107
JH		 1873 if ((off & 1) != 0)
1874 off &= ~1;
1875 else
1876 {
1877 bfd_put_64 (output_bfd, relocation,
c434dee6 1878 htab->sgot->contents + off);
51e0a107
JH		 1879 h->got.offset |= 1;
1880 }
1881 }
053579d7 1882 else
b34976b6 1883 unresolved_reloc = FALSE;
70256ad8 1884 }
51e0a107
JH		 1885 else
1886 {
c434dee6
AJ		 1887 if (local_got_offsets == NULL)
1888 abort ();
51e0a107
JH		 1889
1890 off = local_got_offsets[r_symndx];
1891
1892 /* The offset must always be a multiple of 8. We use
407443a3
AJ		 1893 the least significant bit to record whether we have
1894 already generated the necessary reloc. */
51e0a107
JH		 1895 if ((off & 1) != 0)
1896 off &= ~1;
1897 else
1898 {
c434dee6
AJ		 1899 bfd_put_64 (output_bfd, relocation,
1900 htab->sgot->contents + off);
51e0a107
JH		 1901
1902 if (info->shared)
1903 {
947216bf 1904 asection *s;
51e0a107 1905 Elf_Internal_Rela outrel;
947216bf 1906 bfd_byte *loc;
70256ad8 1907
51e0a107
JH		 1908 /* We need to generate a R_X86_64_RELATIVE reloc
1909 for the dynamic linker. */
947216bf
AM		 1910 s = htab->srelgot;
1911 if (s == NULL)
c434dee6 1912 abort ();
51e0a107 1913
c434dee6
AJ		 1914 outrel.r_offset = (htab->sgot->output_section->vma
1915 + htab->sgot->output_offset
51e0a107
JH		 1916 + off);
1917 outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
1918 outrel.r_addend = relocation;
947216bf
AM		 1919 loc = s->contents;
1920 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 1921 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
51e0a107
JH		 1922 }
1923
1924 local_got_offsets[r_symndx] |= 1;
1925 }
51e0a107 1926 }
6a2bda3f 1927
c434dee6
AJ		 1928 if (off >= (bfd_vma) -2)
1929 abort ();
1930
1931 relocation = htab->sgot->output_offset + off;
1932 if (r_type == R_X86_64_GOTPCREL)
1933 relocation += htab->sgot->output_section->vma;
1934
70256ad8
AJ		 1935 break;
1936
1937 case R_X86_64_PLT32:
1938 /* Relocation is to the entry for this symbol in the
1939 procedure linkage table. */
1940
1941 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 1942 without using the procedure linkage table. */
70256ad8
AJ		 1943 if (h == NULL)
1944 break;
1945
c434dee6
AJ		 1946 if (h->plt.offset == (bfd_vma) -1
1947 || htab->splt == NULL)
70256ad8
AJ		 1948 {
1949 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ		 1950 happens when statically linking PIC code, or when
1951 using -Bsymbolic. */
70256ad8
AJ		 1952 break;
1953 }
1954
c434dee6
AJ		 1955 relocation = (htab->splt->output_section->vma
1956 + htab->splt->output_offset
70256ad8 1957 + h->plt.offset);
b34976b6 1958 unresolved_reloc = FALSE;
70256ad8
AJ		 1959 break;
1960
fd8ab9e5
AJ		 1961 case R_X86_64_PC8:
1962 case R_X86_64_PC16:
1963 case R_X86_64_PC32:
70256ad8
AJ		 1964 case R_X86_64_8:
1965 case R_X86_64_16:
1966 case R_X86_64_32:
6b3db546 1967 case R_X86_64_64:
80643fbc 1968 /* FIXME: The ABI says the linker should make sure the value is
407443a3 1969 the same when it's zeroextended to 64 bit. */
c434dee6
AJ		 1970
1971 /* r_symndx will be zero only for relocs against symbols
1972 from removed linkonce sections, or sections discarded by
1973 a linker script. */
1974 if (r_symndx == 0
1975 || (input_section->flags & SEC_ALLOC) == 0)
1976 break;
1977
1978 if ((info->shared
4bc6e03a
AJ		 1979 && (h == NULL
1980 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1981 || h->root.type != bfd_link_hash_undefweak)
c434dee6
AJ		 1982 && ((r_type != R_X86_64_PC8
1983 && r_type != R_X86_64_PC16
1984 && r_type != R_X86_64_PC32)
f6c52c13 1985 || !SYMBOL_CALLS_LOCAL (info, h)))
d40d037c
AJ		 1986 || (ELIMINATE_COPY_RELOCS
1987 && !info->shared
c434dee6
AJ		 1988 && h != NULL
1989 && h->dynindx != -1
1990 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1991 && (((h->elf_link_hash_flags
1992 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1993 && (h->elf_link_hash_flags
1994 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1995 || h->root.type == bfd_link_hash_undefweak
1996 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ		 1997 {
1998 Elf_Internal_Rela outrel;
947216bf 1999 bfd_byte *loc;
b34976b6 2000 bfd_boolean skip, relocate;
c434dee6 2001 asection *sreloc;
70256ad8
AJ		 2002
2003 /* When generating a shared object, these relocations
2004 are copied into the output file to be resolved at run
407443a3 2005 time. */
b34976b6
AM		 2006 skip = FALSE;
2007 relocate = FALSE;
70256ad8 2008
c629eae0
JJ		 2009 outrel.r_offset =
2010 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 2011 rel->r_offset);
c629eae0 2012 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2013 skip = TRUE;
0fb19cbc 2014 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2015 skip = TRUE, relocate = TRUE;
70256ad8
AJ		 2016
2017 outrel.r_offset += (input_section->output_section->vma
2018 + input_section->output_offset);
2019
2020 if (skip)
0bb2d96a 2021 memset (&outrel, 0, sizeof outrel);
c434dee6 2022
fd8ab9e5
AJ		 2023 /* h->dynindx may be -1 if this symbol was marked to
2024 become local. */
2025 else if (h != NULL
c434dee6
AJ		 2026 && h->dynindx != -1
2027 && (r_type == R_X86_64_PC8
2028 || r_type == R_X86_64_PC16
2029 || r_type == R_X86_64_PC32
2030 || !info->shared
2031 || !info->symbolic
fd8ab9e5
AJ		 2032 || (h->elf_link_hash_flags
2033 & ELF_LINK_HASH_DEF_REGULAR) == 0))
70256ad8 2034 {
70256ad8 2035 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
c434dee6 2036 outrel.r_addend = rel->r_addend;
70256ad8
AJ		 2037 }
2038 else
2039 {
c434dee6 2040 /* This symbol is local, or marked to become local. */
607c0e09
AS		 2041 if (r_type == R_X86_64_64)
2042 {
b34976b6 2043 relocate = TRUE;
607c0e09
AS		 2044 outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
2045 outrel.r_addend = relocation + rel->r_addend;
2046 }
2047 else
2048 {
2049 long sindx;
2050
2051 if (h == NULL)
2052 sec = local_sections[r_symndx];
2053 else
2054 {
2055 BFD_ASSERT (h->root.type == bfd_link_hash_defined
2056 || (h->root.type
2057 == bfd_link_hash_defweak));
2058 sec = h->root.u.def.section;
2059 }
2060 if (sec != NULL && bfd_is_abs_section (sec))
2061 sindx = 0;
2062 else if (sec == NULL || sec->owner == NULL)
2063 {
2064 bfd_set_error (bfd_error_bad_value);
b34976b6 2065 return FALSE;
607c0e09
AS		 2066 }
2067 else
2068 {
2069 asection *osec;
2070
2071 osec = sec->output_section;
2072 sindx = elf_section_data (osec)->dynindx;
2073 BFD_ASSERT (sindx > 0);
2074 }
2075
2076 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2077 outrel.r_addend = relocation + rel->r_addend;
2078 }
70256ad8
AJ		 2079 }
2080
c434dee6
AJ		 2081 sreloc = elf_section_data (input_section)->sreloc;
2082 if (sreloc == NULL)
2083 abort ();
2084
947216bf
AM		 2085 loc = sreloc->contents;
2086 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 2087 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
70256ad8
AJ		 2088
2089 /* If this reloc is against an external symbol, we do
2090 not want to fiddle with the addend. Otherwise, we
2091 need to include the symbol value so that it becomes
2092 an addend for the dynamic reloc. */
2093 if (! relocate)
2094 continue;
2095 }
2096
2097 break;
2098
bffbf940
JJ		 2099 case R_X86_64_TLSGD:
2100 case R_X86_64_GOTTPOFF:
2101 r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL);
2102 tls_type = GOT_UNKNOWN;
2103 if (h == NULL && local_got_offsets)
2104 tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx];
2105 else if (h != NULL)
2106 {
2107 tls_type = elf64_x86_64_hash_entry (h)->tls_type;
2108 if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE)
2109 r_type = R_X86_64_TPOFF32;
2110 }
2111 if (r_type == R_X86_64_TLSGD)
2112 {
2113 if (tls_type == GOT_TLS_IE)
2114 r_type = R_X86_64_GOTTPOFF;
2115 }
2116
2117 if (r_type == R_X86_64_TPOFF32)
2118 {
2119 BFD_ASSERT (! unresolved_reloc);
2120 if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
2121 {
2122 unsigned int i;
abcf1d52
JJ		 2123 static unsigned char tlsgd[8]
2124 = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 };
bffbf940
JJ		 2125
2126 /* GD->LE transition.
abcf1d52
JJ		 2127 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
2128 .word 0x6666; rex64; call __tls_get_addr@plt
bffbf940
JJ		 2129 Change it into:
2130 movq %fs:0, %rax
2131 leaq foo@tpoff(%rax), %rax */
abcf1d52
JJ		 2132 BFD_ASSERT (rel->r_offset >= 4);
2133 for (i = 0; i < 4; i++)
bffbf940 2134 BFD_ASSERT (bfd_get_8 (input_bfd,
abcf1d52 2135 contents + rel->r_offset - 4 + i)
bffbf940 2136 == tlsgd[i]);
abcf1d52
JJ		 2137 BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size);
2138 for (i = 0; i < 4; i++)
2139 BFD_ASSERT (bfd_get_8 (input_bfd,
2140 contents + rel->r_offset + 4 + i)
2141 == tlsgd[i+4]);
bffbf940
JJ		 2142 BFD_ASSERT (rel + 1 < relend);
2143 BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
abcf1d52 2144 memcpy (contents + rel->r_offset - 4,
bffbf940
JJ		 2145 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
2146 16);
2147 bfd_put_32 (output_bfd, tpoff (info, relocation),
abcf1d52 2148 contents + rel->r_offset + 8);
bffbf940
JJ		 2149 /* Skip R_X86_64_PLT32. */
2150 rel++;
2151 continue;
2152 }
2153 else
2154 {
2155 unsigned int val, type, reg;
2156
2157 /* IE->LE transition:
2158 Originally it can be one of:
2159 movq foo@gottpoff(%rip), %reg
2160 addq foo@gottpoff(%rip), %reg
2161 We change it into:
2162 movq $foo, %reg
2163 leaq foo(%reg), %reg
2164 addq $foo, %reg. */
2165 BFD_ASSERT (rel->r_offset >= 3);
2166 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3);
2167 BFD_ASSERT (val == 0x48 || val == 0x4c);
2168 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2169 BFD_ASSERT (type == 0x8b || type == 0x03);
2170 reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2171 BFD_ASSERT ((reg & 0xc7) == 5);
2172 reg >>= 3;
2173 BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
2174 if (type == 0x8b)
2175 {
2176 /* movq */
2177 if (val == 0x4c)
2178 bfd_put_8 (output_bfd, 0x49,
2179 contents + rel->r_offset - 3);
2180 bfd_put_8 (output_bfd, 0xc7,
2181 contents + rel->r_offset - 2);
2182 bfd_put_8 (output_bfd, 0xc0 | reg,
2183 contents + rel->r_offset - 1);
2184 }
2185 else if (reg == 4)
2186 {
2187 /* addq -> addq - addressing with %rsp/%r12 is
2188 special */
2189 if (val == 0x4c)
2190 bfd_put_8 (output_bfd, 0x49,
2191 contents + rel->r_offset - 3);
2192 bfd_put_8 (output_bfd, 0x81,
2193 contents + rel->r_offset - 2);
2194 bfd_put_8 (output_bfd, 0xc0 | reg,
2195 contents + rel->r_offset - 1);
2196 }
2197 else
2198 {
2199 /* addq -> leaq */
2200 if (val == 0x4c)
2201 bfd_put_8 (output_bfd, 0x4d,
2202 contents + rel->r_offset - 3);
2203 bfd_put_8 (output_bfd, 0x8d,
2204 contents + rel->r_offset - 2);
2205 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
2206 contents + rel->r_offset - 1);
2207 }
2208 bfd_put_32 (output_bfd, tpoff (info, relocation),
2209 contents + rel->r_offset);
2210 continue;
2211 }
2212 }
2213
2214 if (htab->sgot == NULL)
2215 abort ();
2216
2217 if (h != NULL)
2218 off = h->got.offset;
2219 else
2220 {
2221 if (local_got_offsets == NULL)
2222 abort ();
2223
2224 off = local_got_offsets[r_symndx];
2225 }
2226
2227 if ((off & 1) != 0)
2228 off &= ~1;
26e41594 2229 else
bffbf940
JJ		 2230 {
2231 Elf_Internal_Rela outrel;
947216bf 2232 bfd_byte *loc;
bffbf940
JJ		 2233 int dr_type, indx;
2234
2235 if (htab->srelgot == NULL)
2236 abort ();
2237
2238 outrel.r_offset = (htab->sgot->output_section->vma
2239 + htab->sgot->output_offset + off);
2240
2241 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2242 if (r_type == R_X86_64_TLSGD)
2243 dr_type = R_X86_64_DTPMOD64;
2244 else
2245 dr_type = R_X86_64_TPOFF64;
2246
2247 bfd_put_64 (output_bfd, 0, htab->sgot->contents + off);
2248 outrel.r_addend = 0;
2249 if (dr_type == R_X86_64_TPOFF64 && indx == 0)
2250 outrel.r_addend = relocation - dtpoff_base (info);
2251 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2252
947216bf
AM		 2253 loc = htab->srelgot->contents;
2254 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
bffbf940
JJ		 2255 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2256
2257 if (r_type == R_X86_64_TLSGD)
2258 {
2259 if (indx == 0)
2260 {
d40d037c 2261 BFD_ASSERT (! unresolved_reloc);
bffbf940
JJ		 2262 bfd_put_64 (output_bfd,
2263 relocation - dtpoff_base (info),
2264 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2265 }
2266 else
2267 {
2268 bfd_put_64 (output_bfd, 0,
2269 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2270 outrel.r_info = ELF64_R_INFO (indx,
2271 R_X86_64_DTPOFF64);
2272 outrel.r_offset += GOT_ENTRY_SIZE;
2273 htab->srelgot->reloc_count++;
947216bf
AM		 2274 loc += sizeof (Elf64_External_Rela);
2275 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
bffbf940
JJ		 2276 }
2277 }
2278
2279 if (h != NULL)
2280 h->got.offset |= 1;
2281 else
2282 local_got_offsets[r_symndx] |= 1;
2283 }
2284
2285 if (off >= (bfd_vma) -2)
2286 abort ();
2287 if (r_type == ELF64_R_TYPE (rel->r_info))
2288 {
2289 relocation = htab->sgot->output_section->vma
2290 + htab->sgot->output_offset + off;
b34976b6 2291 unresolved_reloc = FALSE;
bffbf940
JJ		 2292 }
2293 else
2294 {
2295 unsigned int i;
abcf1d52
JJ		 2296 static unsigned char tlsgd[8]
2297 = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 };
bffbf940
JJ		 2298
2299 /* GD->IE transition.
abcf1d52
JJ		 2300 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
2301 .word 0x6666; rex64; call __tls_get_addr@plt
bffbf940
JJ		 2302 Change it into:
2303 movq %fs:0, %rax
2304 addq foo@gottpoff(%rip), %rax */
abcf1d52
JJ		 2305 BFD_ASSERT (rel->r_offset >= 4);
2306 for (i = 0; i < 4; i++)
26e41594 2307 BFD_ASSERT (bfd_get_8 (input_bfd,
abcf1d52 2308 contents + rel->r_offset - 4 + i)
bffbf940 2309 == tlsgd[i]);
abcf1d52
JJ		 2310 BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size);
2311 for (i = 0; i < 4; i++)
26e41594 2312 BFD_ASSERT (bfd_get_8 (input_bfd,
abcf1d52
JJ		 2313 contents + rel->r_offset + 4 + i)
2314 == tlsgd[i+4]);
bffbf940
JJ		 2315 BFD_ASSERT (rel + 1 < relend);
2316 BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
abcf1d52 2317 memcpy (contents + rel->r_offset - 4,
bffbf940
JJ		 2318 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
2319 16);
2320
2321 relocation = (htab->sgot->output_section->vma
2322 + htab->sgot->output_offset + off
2323 - rel->r_offset
2324 - input_section->output_section->vma
2325 - input_section->output_offset
abcf1d52 2326 - 12);
bffbf940 2327 bfd_put_32 (output_bfd, relocation,
abcf1d52 2328 contents + rel->r_offset + 8);
bffbf940
JJ		 2329 /* Skip R_X86_64_PLT32. */
2330 rel++;
2331 continue;
2332 }
2333 break;
2334
2335 case R_X86_64_TLSLD:
2336 if (! info->shared)
2337 {
2338 /* LD->LE transition:
2339 Ensure it is:
2340 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt.
2341 We change it into:
2342 .word 0x6666; .byte 0x66; movl %fs:0, %rax. */
2343 BFD_ASSERT (rel->r_offset >= 3);
2344 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3)
2345 == 0x48);
2346 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
2347 == 0x8d);
2348 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1)
2349 == 0x3d);
2350 BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2351 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2352 == 0xe8);
2353 BFD_ASSERT (rel + 1 < relend);
2354 BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
2355 memcpy (contents + rel->r_offset - 3,
2356 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
2357 /* Skip R_X86_64_PLT32. */
2358 rel++;
2359 continue;
2360 }
2361
2362 if (htab->sgot == NULL)
2363 abort ();
2364
2365 off = htab->tls_ld_got.offset;
2366 if (off & 1)
2367 off &= ~1;
2368 else
2369 {
2370 Elf_Internal_Rela outrel;
947216bf 2371 bfd_byte *loc;
bffbf940
JJ		 2372
2373 if (htab->srelgot == NULL)
2374 abort ();
2375
2376 outrel.r_offset = (htab->sgot->output_section->vma
2377 + htab->sgot->output_offset + off);
2378
2379 bfd_put_64 (output_bfd, 0,
2380 htab->sgot->contents + off);
2381 bfd_put_64 (output_bfd, 0,
2382 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2383 outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64);
2384 outrel.r_addend = 0;
947216bf
AM		 2385 loc = htab->srelgot->contents;
2386 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
bffbf940
JJ		 2387 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2388 htab->tls_ld_got.offset |= 1;
2389 }
2390 relocation = htab->sgot->output_section->vma
2391 + htab->sgot->output_offset + off;
b34976b6 2392 unresolved_reloc = FALSE;
bffbf940
JJ		 2393 break;
2394
2395 case R_X86_64_DTPOFF32:
a45bb67d 2396 if (info->shared || (input_section->flags & SEC_CODE) == 0)
bffbf940
JJ		 2397 relocation -= dtpoff_base (info);
2398 else
2399 relocation = tpoff (info, relocation);
2400 break;
2401
2402 case R_X86_64_TPOFF32:
2403 BFD_ASSERT (! info->shared);
2404 relocation = tpoff (info, relocation);
2405 break;
2406
70256ad8
AJ		 2407 default:
2408 break;
2409 }
8d88c4ca 2410
239e1f3a
AM		 2411 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2412 because such sections are not SEC_ALLOC and thus ld.so will
2413 not process them. */
c434dee6 2414 if (unresolved_reloc
239e1f3a 2415 && !((input_section->flags & SEC_DEBUGGING) != 0
c434dee6
AJ		 2416 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2417 (*_bfd_error_handler)
2418 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2419 bfd_archive_filename (input_bfd),
2420 bfd_get_section_name (input_bfd, input_section),
2421 (long) rel->r_offset,
2422 h->root.root.string);
2423
8d88c4ca 2424 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ		 2425 contents, rel->r_offset,
2426 relocation, rel->r_addend);
8d88c4ca
NC		 2427
2428 if (r != bfd_reloc_ok)
8da6118f 2429 {
c434dee6
AJ		 2430 const char *name;
2431
2432 if (h != NULL)
2433 name = h->root.root.string;
2434 else
8da6118f 2435 {
c434dee6
AJ		 2436 name = bfd_elf_string_from_elf_section (input_bfd,
2437 symtab_hdr->sh_link,
2438 sym->st_name);
2439 if (name == NULL)
b34976b6 2440 return FALSE;
c434dee6
AJ		 2441 if (*name == '\0')
2442 name = bfd_section_name (input_bfd, sec);
2443 }
2444
2445 if (r == bfd_reloc_overflow)
2446 {
2447
2448 if (! ((*info->callbacks->reloc_overflow)
2449 (info, name, howto->name, (bfd_vma) 0,
2450 input_bfd, input_section, rel->r_offset)))
b34976b6 2451 return FALSE;
c434dee6
AJ		 2452 }
2453 else
2454 {
2455 (*_bfd_error_handler)
2456 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2457 bfd_archive_filename (input_bfd),
2458 bfd_get_section_name (input_bfd, input_section),
2459 (long) rel->r_offset, name, (int) r);
b34976b6 2460 return FALSE;
8da6118f
KH		 2461 }
2462 }
8d88c4ca 2463 }
70256ad8 2464
b34976b6 2465 return TRUE;
70256ad8
AJ		 2466}
2467
2468/* Finish up dynamic symbol handling. We set the contents of various
2469 dynamic sections here. */
2470
b34976b6 2471static bfd_boolean
27482721
AJ		 2472elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd,
2473 struct bfd_link_info *info,
2474 struct elf_link_hash_entry *h,
2475 Elf_Internal_Sym *sym)
70256ad8 2476{
c434dee6 2477 struct elf64_x86_64_link_hash_table *htab;
70256ad8 2478
c434dee6 2479 htab = elf64_x86_64_hash_table (info);
70256ad8
AJ		 2480
2481 if (h->plt.offset != (bfd_vma) -1)
2482 {
70256ad8
AJ		 2483 bfd_vma plt_index;
2484 bfd_vma got_offset;
2485 Elf_Internal_Rela rela;
947216bf 2486 bfd_byte *loc;
70256ad8
AJ		 2487
2488 /* This symbol has an entry in the procedure linkage table. Set
407443a3 2489 it up. */
c434dee6
AJ		 2490 if (h->dynindx == -1
2491 || htab->splt == NULL
2492 || htab->sgotplt == NULL
2493 || htab->srelplt == NULL)
2494 abort ();
70256ad8
AJ		 2495
2496 /* Get the index in the procedure linkage table which
2497 corresponds to this symbol. This is the index of this symbol
2498 in all the symbols for which we are making plt entries. The
2499 first entry in the procedure linkage table is reserved. */
2500 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2501
2502 /* Get the offset into the .got table of the entry that
407443a3 2503 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
fe4770f4 2504 bytes. The first three are reserved for the dynamic linker. */
70256ad8
AJ		 2505 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
2506
2507 /* Fill in the entry in the procedure linkage table. */
c434dee6 2508 memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry,
70256ad8
AJ		 2509 PLT_ENTRY_SIZE);
2510
2511 /* Insert the relocation positions of the plt section. The magic
2512 numbers at the end of the statements are the positions of the
2513 relocations in the plt section. */
653165cc
AJ		 2514 /* Put offset for jmp *name@GOTPCREL(%rip), since the
2515 instruction uses 6 bytes, subtract this value. */
2516 bfd_put_32 (output_bfd,
c434dee6
AJ		 2517 (htab->sgotplt->output_section->vma
2518 + htab->sgotplt->output_offset
653165cc 2519 + got_offset
c434dee6
AJ		 2520 - htab->splt->output_section->vma
2521 - htab->splt->output_offset
653165cc
AJ		 2522 - h->plt.offset
2523 - 6),
c434dee6 2524 htab->splt->contents + h->plt.offset + 2);
653165cc
AJ		 2525 /* Put relocation index. */
2526 bfd_put_32 (output_bfd, plt_index,
c434dee6 2527 htab->splt->contents + h->plt.offset + 7);
653165cc
AJ		 2528 /* Put offset for jmp .PLT0. */
2529 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
c434dee6 2530 htab->splt->contents + h->plt.offset + 12);
70256ad8 2531
653165cc
AJ		 2532 /* Fill in the entry in the global offset table, initially this
2533 points to the pushq instruction in the PLT which is at offset 6. */
c434dee6
AJ		 2534 bfd_put_64 (output_bfd, (htab->splt->output_section->vma
2535 + htab->splt->output_offset
70256ad8 2536 + h->plt.offset + 6),
c434dee6 2537 htab->sgotplt->contents + got_offset);
70256ad8
AJ		 2538
2539 /* Fill in the entry in the .rela.plt section. */
c434dee6
AJ		 2540 rela.r_offset = (htab->sgotplt->output_section->vma
2541 + htab->sgotplt->output_offset
70256ad8
AJ		 2542 + got_offset);
2543 rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT);
2544 rela.r_addend = 0;
947216bf 2545 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
c434dee6 2546 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
70256ad8
AJ		 2547
2548 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2549 {
2550 /* Mark the symbol as undefined, rather than as defined in
c434dee6
AJ		 2551 the .plt section. Leave the value alone. This is a clue
2552 for the dynamic linker, to make function pointer
2553 comparisons work between an application and shared
2554 library. */
70256ad8
AJ		 2555 sym->st_shndx = SHN_UNDEF;
2556 }
2557 }
2558
bffbf940
JJ		 2559 if (h->got.offset != (bfd_vma) -1
2560 && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_GD
2561 && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 2562 {
053579d7 2563 Elf_Internal_Rela rela;
947216bf 2564 bfd_byte *loc;
053579d7
AJ		 2565
2566 /* This symbol has an entry in the global offset table. Set it
bffbf940 2567 up. */
c434dee6
AJ		 2568 if (htab->sgot == NULL || htab->srelgot == NULL)
2569 abort ();
053579d7 2570
c434dee6
AJ		 2571 rela.r_offset = (htab->sgot->output_section->vma
2572 + htab->sgot->output_offset
dc810e39 2573 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ		 2574
2575 /* If this is a static link, or it is a -Bsymbolic link and the
2576 symbol is defined locally or was forced to be local because
2577 of a version file, we just want to emit a RELATIVE reloc.
2578 The entry in the global offset table will already have been
2579 initialized in the relocate_section function. */
c434dee6 2580 if (info->shared
27482721 2581 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 2582 {
cc78d0af 2583 BFD_ASSERT((h->got.offset & 1) != 0);
053579d7
AJ		 2584 rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
2585 rela.r_addend = (h->root.u.def.value
2586 + h->root.u.def.section->output_section->vma
2587 + h->root.u.def.section->output_offset);
2588 }
2589 else
2590 {
2591 BFD_ASSERT((h->got.offset & 1) == 0);
c434dee6
AJ		 2592 bfd_put_64 (output_bfd, (bfd_vma) 0,
2593 htab->sgot->contents + h->got.offset);
053579d7
AJ		 2594 rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT);
2595 rela.r_addend = 0;
2596 }
2597
947216bf
AM		 2598 loc = htab->srelgot->contents;
2599 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 2600 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
053579d7
AJ		 2601 }
2602
70256ad8
AJ		 2603 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2604 {
70256ad8 2605 Elf_Internal_Rela rela;
947216bf 2606 bfd_byte *loc;
70256ad8
AJ		 2607
2608 /* This symbol needs a copy reloc. Set it up. */
2609
c434dee6
AJ		 2610 if (h->dynindx == -1
2611 || (h->root.type != bfd_link_hash_defined
2612 && h->root.type != bfd_link_hash_defweak)
2613 || htab->srelbss == NULL)
2614 abort ();
70256ad8
AJ		 2615
2616 rela.r_offset = (h->root.u.def.value
2617 + h->root.u.def.section->output_section->vma
2618 + h->root.u.def.section->output_offset);
2619 rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY);
2620 rela.r_addend = 0;
947216bf
AM		 2621 loc = htab->srelbss->contents;
2622 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 2623 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
70256ad8
AJ		 2624 }
2625
2626 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2627 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2628 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2629 sym->st_shndx = SHN_ABS;
2630
b34976b6 2631 return TRUE;
70256ad8
AJ		 2632}
2633
c434dee6
AJ		 2634/* Used to decide how to sort relocs in an optimal manner for the
2635 dynamic linker, before writing them out. */
2636
2637static enum elf_reloc_type_class
27482721 2638elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
c434dee6
AJ		 2639{
2640 switch ((int) ELF64_R_TYPE (rela->r_info))
2641 {
2642 case R_X86_64_RELATIVE:
2643 return reloc_class_relative;
2644 case R_X86_64_JUMP_SLOT:
2645 return reloc_class_plt;
2646 case R_X86_64_COPY:
2647 return reloc_class_copy;
2648 default:
2649 return reloc_class_normal;
2650 }
2651}
2652
70256ad8
AJ		 2653/* Finish up the dynamic sections. */
2654
b34976b6 2655static bfd_boolean
27482721 2656elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
70256ad8 2657{
c434dee6 2658 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 2659 bfd *dynobj;
2660 asection *sdyn;
70256ad8 2661
c434dee6
AJ		 2662 htab = elf64_x86_64_hash_table (info);
2663 dynobj = htab->elf.dynobj;
70256ad8
AJ		 2664 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2665
c434dee6 2666 if (htab->elf.dynamic_sections_created)
70256ad8 2667 {
70256ad8
AJ		 2668 Elf64_External_Dyn *dyncon, *dynconend;
2669
c434dee6
AJ		 2670 if (sdyn == NULL || htab->sgot == NULL)
2671 abort ();
70256ad8
AJ		 2672
2673 dyncon = (Elf64_External_Dyn *) sdyn->contents;
2674 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2675 for (; dyncon < dynconend; dyncon++)
2676 {
2677 Elf_Internal_Dyn dyn;
70256ad8
AJ		 2678 asection *s;
2679
2680 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
2681
2682 switch (dyn.d_tag)
2683 {
2684 default:
053579d7 2685 continue;
70256ad8
AJ		 2686
2687 case DT_PLTGOT:
c434dee6
AJ		 2688 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
2689 break;
70256ad8
AJ		 2690
2691 case DT_JMPREL:
c434dee6
AJ		 2692 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
2693 break;
70256ad8 2694
c434dee6
AJ		 2695 case DT_PLTRELSZ:
2696 s = htab->srelplt->output_section;
2697 if (s->_cooked_size != 0)
2698 dyn.d_un.d_val = s->_cooked_size;
2699 else
2700 dyn.d_un.d_val = s->_raw_size;
70256ad8
AJ		 2701 break;
2702
2703 case DT_RELASZ:
c434dee6
AJ		 2704 /* The procedure linkage table relocs (DT_JMPREL) should
2705 not be included in the overall relocs (DT_RELA).
2706 Therefore, we override the DT_RELASZ entry here to
2707 make it not include the JMPREL relocs. Since the
2708 linker script arranges for .rela.plt to follow all
2709 other relocation sections, we don't have to worry
2710 about changing the DT_RELA entry. */
2711 if (htab->srelplt != NULL)
70256ad8 2712 {
c434dee6
AJ		 2713 s = htab->srelplt->output_section;
2714 if (s->_cooked_size != 0)
2715 dyn.d_un.d_val -= s->_cooked_size;
2716 else
2717 dyn.d_un.d_val -= s->_raw_size;
70256ad8
AJ		 2718 }
2719 break;
70256ad8 2720 }
c434dee6 2721
70256ad8
AJ		 2722 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2723 }
2724
c434dee6
AJ		 2725 /* Fill in the special first entry in the procedure linkage table. */
2726 if (htab->splt && htab->splt->_raw_size > 0)
70256ad8 2727 {
653165cc 2728 /* Fill in the first entry in the procedure linkage table. */
c434dee6
AJ		 2729 memcpy (htab->splt->contents, elf64_x86_64_plt0_entry,
2730 PLT_ENTRY_SIZE);
653165cc
AJ		 2731 /* Add offset for pushq GOT+8(%rip), since the instruction
2732 uses 6 bytes subtract this value. */
2733 bfd_put_32 (output_bfd,
c434dee6
AJ		 2734 (htab->sgotplt->output_section->vma
2735 + htab->sgotplt->output_offset
653165cc 2736 + 8
c434dee6
AJ		 2737 - htab->splt->output_section->vma
2738 - htab->splt->output_offset
653165cc 2739 - 6),
c434dee6 2740 htab->splt->contents + 2);
653165cc
AJ		 2741 /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to
2742 the end of the instruction. */
2743 bfd_put_32 (output_bfd,
c434dee6
AJ		 2744 (htab->sgotplt->output_section->vma
2745 + htab->sgotplt->output_offset
653165cc 2746 + 16
c434dee6
AJ		 2747 - htab->splt->output_section->vma
2748 - htab->splt->output_offset
653165cc 2749 - 12),
c434dee6 2750 htab->splt->contents + 8);
653165cc 2751
c434dee6
AJ		 2752 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize =
2753 PLT_ENTRY_SIZE;
70256ad8 2754 }
70256ad8
AJ		 2755 }
2756
c434dee6 2757 if (htab->sgotplt)
70256ad8 2758 {
c434dee6
AJ		 2759 /* Fill in the first three entries in the global offset table. */
2760 if (htab->sgotplt->_raw_size > 0)
2761 {
2762 /* Set the first entry in the global offset table to the address of
2763 the dynamic section. */
2764 if (sdyn == NULL)
2765 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents);
2766 else
2767 bfd_put_64 (output_bfd,
2768 sdyn->output_section->vma + sdyn->output_offset,
2769 htab->sgotplt->contents);
2770 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
2771 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE);
2772 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2);
2773 }
70256ad8 2774
c434dee6
AJ		 2775 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize =
2776 GOT_ENTRY_SIZE;
2777 }
70256ad8 2778
b34976b6 2779 return TRUE;
8d88c4ca
NC		 2780}
2781
8df9fc9d 2782
70256ad8
AJ		 2783#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
2784#define TARGET_LITTLE_NAME "elf64-x86-64"
2785#define ELF_ARCH bfd_arch_i386
2786#define ELF_MACHINE_CODE EM_X86_64
2787#define ELF_MAXPAGESIZE 0x100000
2788
2789#define elf_backend_can_gc_sections 1
51b64d56 2790#define elf_backend_can_refcount 1
70256ad8
AJ		 2791#define elf_backend_want_got_plt 1
2792#define elf_backend_plt_readonly 1
2793#define elf_backend_want_plt_sym 0
2794#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 2795#define elf_backend_rela_normal 1
70256ad8
AJ		 2796
2797#define elf_info_to_howto elf64_x86_64_info_to_howto
70256ad8 2798
70256ad8
AJ		 2799#define bfd_elf64_bfd_link_hash_table_create \
2800 elf64_x86_64_link_hash_table_create
407443a3 2801#define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup
70256ad8
AJ		 2802
2803#define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol
2804#define elf_backend_check_relocs elf64_x86_64_check_relocs
c434dee6
AJ		 2805#define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol
2806#define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections
2807#define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections
70256ad8
AJ		 2808#define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol
2809#define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook
2810#define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook
3bab7989
ML		 2811#define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus
2812#define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo
c434dee6 2813#define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class
70256ad8
AJ		 2814#define elf_backend_relocate_section elf64_x86_64_relocate_section
2815#define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections
407443a3 2816#define elf_backend_object_p elf64_x86_64_elf_object_p
bffbf940 2817#define bfd_elf64_mkobject elf64_x86_64_mkobject
8d88c4ca
NC		 2818
2819#include "elf64-target.h"
GDB Binutils - Deliverables
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