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* elf64-ppc.c (toc_adjusting_stub_needed): Exit early if section
[deliverable/binutils-gdb.git] / bfd / elf64-x86-64.c
CommitLineData
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
3addb0a9
DJ		 563 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
564 | ELF_LINK_HASH_NEEDS_PLT));
d40d037c
AJ		 565 else
566 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
8d88c4ca
NC		 567}
568
b34976b6 569static bfd_boolean
27482721 570elf64_x86_64_mkobject (bfd *abfd)
8d88c4ca 571{
bffbf940
JJ		 572 bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata);
573 abfd->tdata.any = bfd_zalloc (abfd, amt);
574 if (abfd->tdata.any == NULL)
b34976b6
AM		 575 return FALSE;
576 return TRUE;
bffbf940
JJ		 577}
578
b34976b6 579static bfd_boolean
27482721 580elf64_x86_64_elf_object_p (bfd *abfd)
bffbf940
JJ		 581{
582 /* Allocate our special target data. */
583 struct elf64_x86_64_obj_tdata *new_tdata;
584 bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata);
585 new_tdata = bfd_zalloc (abfd, amt);
586 if (new_tdata == NULL)
b34976b6 587 return FALSE;
bffbf940
JJ		 588 new_tdata->root = *abfd->tdata.elf_obj_data;
589 abfd->tdata.any = new_tdata;
8d88c4ca
NC		 590 /* Set the right machine number for an x86-64 elf64 file. */
591 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
b34976b6 592 return TRUE;
8d88c4ca
NC		 593}
594
bffbf940 595static int
27482721 596elf64_x86_64_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
bffbf940
JJ		 597{
598 if (info->shared)
599 return r_type;
600
601 switch (r_type)
602 {
603 case R_X86_64_TLSGD:
604 case R_X86_64_GOTTPOFF:
605 if (is_local)
606 return R_X86_64_TPOFF32;
607 return R_X86_64_GOTTPOFF;
608 case R_X86_64_TLSLD:
609 return R_X86_64_TPOFF32;
610 }
611
612 return r_type;
613}
614
70256ad8 615/* Look through the relocs for a section during the first phase, and
c434dee6
AJ		 616 calculate needed space in the global offset table, procedure
617 linkage table, and dynamic reloc sections. */
70256ad8 618
b34976b6 619static bfd_boolean
27482721
AJ		 620elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
621 const Elf_Internal_Rela *relocs)
70256ad8 622{
c434dee6 623 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 624 Elf_Internal_Shdr *symtab_hdr;
625 struct elf_link_hash_entry **sym_hashes;
70256ad8
AJ		 626 const Elf_Internal_Rela *rel;
627 const Elf_Internal_Rela *rel_end;
70256ad8
AJ		 628 asection *sreloc;
629
1049f94e 630 if (info->relocatable)
b34976b6 631 return TRUE;
70256ad8 632
c434dee6 633 htab = elf64_x86_64_hash_table (info);
70256ad8
AJ		 634 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
635 sym_hashes = elf_sym_hashes (abfd);
70256ad8 636
c434dee6
AJ		 637 sreloc = NULL;
638
70256ad8
AJ		 639 rel_end = relocs + sec->reloc_count;
640 for (rel = relocs; rel < rel_end; rel++)
641 {
bffbf940 642 unsigned int r_type;
70256ad8
AJ		 643 unsigned long r_symndx;
644 struct elf_link_hash_entry *h;
645
646 r_symndx = ELF64_R_SYM (rel->r_info);
bffbf940 647 r_type = ELF64_R_TYPE (rel->r_info);
c434dee6
AJ		 648
649 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
650 {
651 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
652 bfd_archive_filename (abfd),
653 r_symndx);
b34976b6 654 return FALSE;
c434dee6
AJ		 655 }
656
70256ad8
AJ		 657 if (r_symndx < symtab_hdr->sh_info)
658 h = NULL;
659 else
660 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
661
bffbf940
JJ		 662 r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL);
663 switch (r_type)
70256ad8 664 {
bffbf940
JJ		 665 case R_X86_64_TLSLD:
666 htab->tls_ld_got.refcount += 1;
667 goto create_got;
668
669 case R_X86_64_TPOFF32:
670 if (info->shared)
70256ad8 671 {
bffbf940
JJ		 672 (*_bfd_error_handler)
673 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
674 bfd_archive_filename (abfd),
675 x86_64_elf_howto_table[r_type].name);
676 bfd_set_error (bfd_error_bad_value);
b34976b6 677 return FALSE;
70256ad8 678 }
bffbf940 679 break;
c434dee6 680
bffbf940
JJ		 681 case R_X86_64_GOTTPOFF:
682 if (info->shared)
683 info->flags |= DF_STATIC_TLS;
684 /* Fall through */
70256ad8 685
bffbf940
JJ		 686 case R_X86_64_GOT32:
687 case R_X86_64_GOTPCREL:
688 case R_X86_64_TLSGD:
689 /* This symbol requires a global offset table entry. */
690 {
691 int tls_type, old_tls_type;
692
693 switch (r_type)
694 {
695 default: tls_type = GOT_NORMAL; break;
696 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
697 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
698 }
699
700 if (h != NULL)
701 {
702 h->got.refcount += 1;
703 old_tls_type = elf64_x86_64_hash_entry (h)->tls_type;
704 }
705 else
706 {
707 bfd_signed_vma *local_got_refcounts;
708
709 /* This is a global offset table entry for a local symbol. */
710 local_got_refcounts = elf_local_got_refcounts (abfd);
711 if (local_got_refcounts == NULL)
712 {
713 bfd_size_type size;
714
715 size = symtab_hdr->sh_info;
716 size *= sizeof (bfd_signed_vma) + sizeof (char);
717 local_got_refcounts = ((bfd_signed_vma *)
718 bfd_zalloc (abfd, size));
719 if (local_got_refcounts == NULL)
b34976b6 720 return FALSE;
bffbf940
JJ		 721 elf_local_got_refcounts (abfd) = local_got_refcounts;
722 elf64_x86_64_local_got_tls_type (abfd)
723 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
724 }
725 local_got_refcounts[r_symndx] += 1;
726 old_tls_type
727 = elf64_x86_64_local_got_tls_type (abfd) [r_symndx];
728 }
729
730 /* If a TLS symbol is accessed using IE at least once,
731 there is no point to use dynamic model for it. */
732 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
733 && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE))
734 {
735 if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD)
736 tls_type = old_tls_type;
737 else
738 {
739 (*_bfd_error_handler)
740 (_("%s: %s' accessed both as normal and thread local symbol"),
741 bfd_archive_filename (abfd),
742 h ? h->root.root.string : "<local>");
b34976b6 743 return FALSE;
bffbf940
JJ		 744 }
745 }
746
747 if (old_tls_type != tls_type)
748 {
749 if (h != NULL)
750 elf64_x86_64_hash_entry (h)->tls_type = tls_type;
751 else
752 elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
753 }
754 }
c434dee6
AJ		 755 /* Fall through */
756
757 //case R_X86_64_GOTPCREL:
bffbf940 758 create_got:
c434dee6
AJ		 759 if (htab->sgot == NULL)
760 {
761 if (htab->elf.dynobj == NULL)
762 htab->elf.dynobj = abfd;
763 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 764 return FALSE;
c434dee6 765 }
70256ad8
AJ		 766 break;
767
768 case R_X86_64_PLT32:
769 /* This symbol requires a procedure linkage table entry. We
407443a3
AJ		 770 actually build the entry in adjust_dynamic_symbol,
771 because this might be a case of linking PIC code which is
772 never referenced by a dynamic object, in which case we
773 don't need to generate a procedure linkage table entry
774 after all. */
70256ad8
AJ		 775
776 /* If this is a local symbol, we resolve it directly without
407443a3 777 creating a procedure linkage table entry. */
70256ad8
AJ		 778 if (h == NULL)
779 continue;
780
cc78d0af 781 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
51b64d56 782 h->plt.refcount += 1;
70256ad8
AJ		 783 break;
784
cc78d0af
AJ		 785 case R_X86_64_8:
786 case R_X86_64_16:
70256ad8
AJ		 787 case R_X86_64_32:
788 case R_X86_64_32S:
1b71fb54
AJ		 789 /* Let's help debug shared library creation. These relocs
790 cannot be used in shared libs. Don't error out for
791 sections we don't care about, such as debug sections or
792 non-constant sections. */
793 if (info->shared
794 && (sec->flags & SEC_ALLOC) != 0
795 && (sec->flags & SEC_READONLY) != 0)
796 {
797 (*_bfd_error_handler)
798 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
799 bfd_archive_filename (abfd),
bffbf940 800 x86_64_elf_howto_table[r_type].name);
1b71fb54 801 bfd_set_error (bfd_error_bad_value);
b34976b6 802 return FALSE;
1b71fb54
AJ		 803 }
804 /* Fall through. */
805
c434dee6
AJ		 806 case R_X86_64_PC8:
807 case R_X86_64_PC16:
70256ad8 808 case R_X86_64_PC32:
1b71fb54 809 case R_X86_64_64:
c434dee6
AJ		 810 if (h != NULL && !info->shared)
811 {
812 /* If this reloc is in a read-only section, we might
813 need a copy reloc. We can't check reliably at this
814 stage whether the section is read-only, as input
815 sections have not yet been mapped to output sections.
816 Tentatively set the flag for now, and correct in
817 adjust_dynamic_symbol. */
818 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
819
820 /* We may need a .plt entry if the function this reloc
821 refers to is in a shared lib. */
822 h->plt.refcount += 1;
823 }
70256ad8
AJ		 824
825 /* If we are creating a shared library, and this is a reloc
826 against a global symbol, or a non PC relative reloc
827 against a local symbol, then we need to copy the reloc
828 into the shared library. However, if we are linking with
829 -Bsymbolic, we do not need to copy a reloc against a
830 global symbol which is defined in an object we are
407443a3 831 including in the link (i.e., DEF_REGULAR is set). At
70256ad8
AJ		 832 this point we have not seen all the input files, so it is
833 possible that DEF_REGULAR is not set now but will be set
c434dee6
AJ		 834 later (it is never cleared). In case of a weak definition,
835 DEF_REGULAR may be cleared later by a strong definition in
836 a shared library. We account for that possibility below by
837 storing information in the relocs_copied field of the hash
838 table entry. A similar situation occurs when creating
839 shared libraries and symbol visibility changes render the
840 symbol local.
841
842 If on the other hand, we are creating an executable, we
843 may need to keep relocations for symbols satisfied by a
844 dynamic library if we manage to avoid copy relocs for the
845 symbol. */
846 if ((info->shared
847 && (sec->flags & SEC_ALLOC) != 0
bffbf940
JJ		 848 && (((r_type != R_X86_64_PC8)
849 && (r_type != R_X86_64_PC16)
850 && (r_type != R_X86_64_PC32))
c434dee6
AJ		 851 || (h != NULL
852 && (! info->symbolic
853 || h->root.type == bfd_link_hash_defweak
854 || (h->elf_link_hash_flags
855 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
d40d037c
AJ		 856 || (ELIMINATE_COPY_RELOCS
857 && !info->shared
c434dee6
AJ		 858 && (sec->flags & SEC_ALLOC) != 0
859 && h != NULL
860 && (h->root.type == bfd_link_hash_defweak
861 || (h->elf_link_hash_flags
862 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
70256ad8 863 {
c434dee6
AJ		 864 struct elf64_x86_64_dyn_relocs *p;
865 struct elf64_x86_64_dyn_relocs **head;
866
867 /* We must copy these reloc types into the output file.
868 Create a reloc section in dynobj and make room for
869 this reloc. */
70256ad8
AJ		 870 if (sreloc == NULL)
871 {
872 const char *name;
c434dee6 873 bfd *dynobj;
70256ad8
AJ		 874
875 name = (bfd_elf_string_from_elf_section
876 (abfd,
877 elf_elfheader (abfd)->e_shstrndx,
878 elf_section_data (sec)->rel_hdr.sh_name));
879 if (name == NULL)
b34976b6 880 return FALSE;
70256ad8 881
c434dee6
AJ		 882 if (strncmp (name, ".rela", 5) != 0
883 || strcmp (bfd_get_section_name (abfd, sec),
884 name + 5) != 0)
885 {
886 (*_bfd_error_handler)
887 (_("%s: bad relocation section name `%s\'"),
888 bfd_archive_filename (abfd), name);
889 }
890
891 if (htab->elf.dynobj == NULL)
892 htab->elf.dynobj = abfd;
893
894 dynobj = htab->elf.dynobj;
70256ad8
AJ		 895
896 sreloc = bfd_get_section_by_name (dynobj, name);
897 if (sreloc == NULL)
898 {
899 flagword flags;
900
901 sreloc = bfd_make_section (dynobj, name);
902 flags = (SEC_HAS_CONTENTS | SEC_READONLY
903 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
904 if ((sec->flags & SEC_ALLOC) != 0)
905 flags |= SEC_ALLOC | SEC_LOAD;
906 if (sreloc == NULL
907 || ! bfd_set_section_flags (dynobj, sreloc, flags)
cc78d0af 908 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
b34976b6 909 return FALSE;
70256ad8 910 }
c434dee6 911 elf_section_data (sec)->sreloc = sreloc;
70256ad8
AJ		 912 }
913
c434dee6
AJ		 914 /* If this is a global symbol, we count the number of
915 relocations we need for this symbol. */
916 if (h != NULL)
70256ad8 917 {
c434dee6
AJ		 918 head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs;
919 }
920 else
921 {
922 /* Track dynamic relocs needed for local syms too.
923 We really need local syms available to do this
924 easily. Oh well. */
925
926 asection *s;
927 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
928 sec, r_symndx);
929 if (s == NULL)
b34976b6 930 return FALSE;
70256ad8 931
c434dee6
AJ		 932 head = ((struct elf64_x86_64_dyn_relocs **)
933 &elf_section_data (s)->local_dynrel);
934 }
70256ad8 935
c434dee6
AJ		 936 p = *head;
937 if (p == NULL || p->sec != sec)
938 {
939 bfd_size_type amt = sizeof *p;
940 p = ((struct elf64_x86_64_dyn_relocs *)
941 bfd_alloc (htab->elf.dynobj, amt));
70256ad8 942 if (p == NULL)
b34976b6 943 return FALSE;
c434dee6
AJ		 944 p->next = *head;
945 *head = p;
946 p->sec = sec;
947 p->count = 0;
948 p->pc_count = 0;
70256ad8 949 }
c434dee6
AJ		 950
951 p->count += 1;
bffbf940
JJ		 952 if (r_type == R_X86_64_PC8
953 || r_type == R_X86_64_PC16
954 || r_type == R_X86_64_PC32)
c434dee6 955 p->pc_count += 1;
70256ad8
AJ		 956 }
957 break;
fe4770f4
AJ		 958
959 /* This relocation describes the C++ object vtable hierarchy.
960 Reconstruct it for later use during GC. */
961 case R_X86_64_GNU_VTINHERIT:
962 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 963 return FALSE;
fe4770f4
AJ		 964 break;
965
966 /* This relocation describes which C++ vtable entries are actually
967 used. Record for later use during GC. */
968 case R_X86_64_GNU_VTENTRY:
cc78d0af 969 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 970 return FALSE;
fe4770f4 971 break;
c434dee6
AJ		 972
973 default:
974 break;
70256ad8
AJ		 975 }
976 }
977
b34976b6 978 return TRUE;
70256ad8
AJ		 979}
980
981/* Return the section that should be marked against GC for a given
407443a3 982 relocation. */
70256ad8
AJ		 983
984static asection *
27482721
AJ		 985elf64_x86_64_gc_mark_hook (asection *sec,
986 struct bfd_link_info *info ATTRIBUTE_UNUSED,
987 Elf_Internal_Rela *rel,
988 struct elf_link_hash_entry *h,
989 Elf_Internal_Sym *sym)
70256ad8
AJ		 990{
991 if (h != NULL)
992 {
fe4770f4 993 switch (ELF64_R_TYPE (rel->r_info))
70256ad8 994 {
fe4770f4
AJ		 995 case R_X86_64_GNU_VTINHERIT:
996 case R_X86_64_GNU_VTENTRY:
997 break;
70256ad8
AJ		 998
999 default:
fe4770f4
AJ		 1000 switch (h->root.type)
1001 {
1002 case bfd_link_hash_defined:
1003 case bfd_link_hash_defweak:
1004 return h->root.u.def.section;
1005
1006 case bfd_link_hash_common:
1007 return h->root.u.c.p->section;
1008
1009 default:
1010 break;
1011 }
70256ad8
AJ		 1012 }
1013 }
1014 else
1e2f5b6e 1015 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
70256ad8
AJ		 1016
1017 return NULL;
1018}
1019
407443a3 1020/* Update the got entry reference counts for the section being removed. */
70256ad8 1021
b34976b6 1022static bfd_boolean
27482721
AJ		 1023elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
1024 asection *sec, const Elf_Internal_Rela *relocs)
70256ad8
AJ		 1025{
1026 Elf_Internal_Shdr *symtab_hdr;
1027 struct elf_link_hash_entry **sym_hashes;
1028 bfd_signed_vma *local_got_refcounts;
1029 const Elf_Internal_Rela *rel, *relend;
c434dee6
AJ		 1030
1031 elf_section_data (sec)->local_dynrel = NULL;
70256ad8
AJ		 1032
1033 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1034 sym_hashes = elf_sym_hashes (abfd);
1035 local_got_refcounts = elf_local_got_refcounts (abfd);
1036
70256ad8
AJ		 1037 relend = relocs + sec->reloc_count;
1038 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 1039 {
1040 unsigned long r_symndx;
1041 unsigned int r_type;
1042 struct elf_link_hash_entry *h = NULL;
70256ad8 1043
26e41594
AM		 1044 r_symndx = ELF64_R_SYM (rel->r_info);
1045 if (r_symndx >= symtab_hdr->sh_info)
1046 {
1047 struct elf64_x86_64_link_hash_entry *eh;
1048 struct elf64_x86_64_dyn_relocs **pp;
1049 struct elf64_x86_64_dyn_relocs *p;
c434dee6 1050
26e41594
AM		 1051 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1052 eh = (struct elf64_x86_64_link_hash_entry *) h;
c434dee6 1053
26e41594
AM		 1054 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1055 if (p->sec == sec)
1056 {
1057 /* Everything must go for SEC. */
1058 *pp = p->next;
1059 break;
1060 }
1061 }
c434dee6 1062
26e41594
AM		 1063 r_type = ELF64_R_TYPE (rel->r_info);
1064 r_type = elf64_x86_64_tls_transition (info, r_type, h != NULL);
1065 switch (r_type)
1066 {
1067 case R_X86_64_TLSLD:
1068 if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0)
1069 elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1;
1070 break;
c434dee6 1071
26e41594
AM		 1072 case R_X86_64_TLSGD:
1073 case R_X86_64_GOTTPOFF:
1074 case R_X86_64_GOT32:
1075 case R_X86_64_GOTPCREL:
1076 if (h != NULL)
1077 {
1078 if (h->got.refcount > 0)
1079 h->got.refcount -= 1;
1080 }
1081 else if (local_got_refcounts != NULL)
1082 {
1083 if (local_got_refcounts[r_symndx] > 0)
1084 local_got_refcounts[r_symndx] -= 1;
1085 }
1086 break;
c434dee6 1087
26e41594
AM		 1088 case R_X86_64_8:
1089 case R_X86_64_16:
1090 case R_X86_64_32:
1091 case R_X86_64_64:
1092 case R_X86_64_32S:
1093 case R_X86_64_PC8:
1094 case R_X86_64_PC16:
1095 case R_X86_64_PC32:
1096 if (info->shared)
1097 break;
1098 /* Fall thru */
c434dee6 1099
26e41594
AM		 1100 case R_X86_64_PLT32:
1101 if (h != NULL)
1102 {
1103 if (h->plt.refcount > 0)
1104 h->plt.refcount -= 1;
1105 }
1106 break;
70256ad8 1107
26e41594
AM		 1108 default:
1109 break;
1110 }
1111 }
70256ad8 1112
b34976b6 1113 return TRUE;
70256ad8
AJ		 1114}
1115
1116/* Adjust a symbol defined by a dynamic object and referenced by a
1117 regular object. The current definition is in some section of the
1118 dynamic object, but we're not including those sections. We have to
1119 change the definition to something the rest of the link can
407443a3 1120 understand. */
70256ad8 1121
b34976b6 1122static bfd_boolean
27482721
AJ		 1123elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
1124 struct elf_link_hash_entry *h)
70256ad8 1125{
c434dee6 1126 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 1127 asection *s;
1128 unsigned int power_of_two;
1129
70256ad8
AJ		 1130 /* If this is a function, put it in the procedure linkage table. We
1131 will fill in the contents of the procedure linkage table later,
1132 when we know the address of the .got section. */
1133 if (h->type == STT_FUNC
1134 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1135 {
c434dee6 1136 if (h->plt.refcount <= 0
27482721
AJ		 1137 || SYMBOL_CALLS_LOCAL (info, h)
1138 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1139 && h->root.type == bfd_link_hash_undefweak))
70256ad8 1140 {
70256ad8
AJ		 1141 /* This case can occur if we saw a PLT32 reloc in an input
1142 file, but the symbol was never referred to by a dynamic
1143 object, or if all references were garbage collected. In
1144 such a case, we don't actually need to build a procedure
1145 linkage table, and we can just do a PC32 reloc instead. */
70256ad8
AJ		 1146 h->plt.offset = (bfd_vma) -1;
1147 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
70256ad8
AJ		 1148 }
1149
b34976b6 1150 return TRUE;
70256ad8 1151 }
bbd7ec4a 1152 else
c434dee6
AJ		 1153 /* It's possible that we incorrectly decided a .plt reloc was
1154 needed for an R_X86_64_PC32 reloc to a non-function sym in
1155 check_relocs. We can't decide accurately between function and
1156 non-function syms in check-relocs; Objects loaded later in
1157 the link may change h->type. So fix it now. */
bbd7ec4a 1158 h->plt.offset = (bfd_vma) -1;
70256ad8
AJ		 1159
1160 /* If this is a weak symbol, and there is a real definition, the
1161 processor independent code will have arranged for us to see the
407443a3 1162 real definition first, and we can just use the same value. */
70256ad8
AJ		 1163 if (h->weakdef != NULL)
1164 {
1165 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1166 || h->weakdef->root.type == bfd_link_hash_defweak);
1167 h->root.u.def.section = h->weakdef->root.u.def.section;
1168 h->root.u.def.value = h->weakdef->root.u.def.value;
d40d037c
AJ		 1169 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1170 h->elf_link_hash_flags
1171 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1172 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
b34976b6 1173 return TRUE;
70256ad8
AJ		 1174 }
1175
1176 /* This is a reference to a symbol defined by a dynamic object which
407443a3 1177 is not a function. */
70256ad8
AJ		 1178
1179 /* If we are creating a shared library, we must presume that the
1180 only references to the symbol are via the global offset table.
1181 For such cases we need not do anything here; the relocations will
407443a3 1182 be handled correctly by relocate_section. */
70256ad8 1183 if (info->shared)
b34976b6 1184 return TRUE;
70256ad8
AJ		 1185
1186 /* If there are no references to this symbol that do not use the
1187 GOT, we don't need to generate a copy reloc. */
1188 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
b34976b6 1189 return TRUE;
70256ad8 1190
c434dee6
AJ		 1191 /* If -z nocopyreloc was given, we won't generate them either. */
1192 if (info->nocopyreloc)
1193 {
1194 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
b34976b6 1195 return TRUE;
c434dee6
AJ		 1196 }
1197
d40d037c 1198 if (ELIMINATE_COPY_RELOCS)
c434dee6 1199 {
d40d037c
AJ		 1200 struct elf64_x86_64_link_hash_entry * eh;
1201 struct elf64_x86_64_dyn_relocs *p;
c434dee6 1202
d40d037c
AJ		 1203 eh = (struct elf64_x86_64_link_hash_entry *) h;
1204 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1205 {
1206 s = p->sec->output_section;
1207 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1208 break;
1209 }
1210
1211 /* If we didn't find any dynamic relocs in read-only sections, then
1212 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1213 if (p == NULL)
1214 {
1215 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1216 return TRUE;
1217 }
c434dee6
AJ		 1218 }
1219
70256ad8 1220 /* We must allocate the symbol in our .dynbss section, which will
407443a3 1221 become part of the .bss section of the executable. There will be
70256ad8
AJ		 1222 an entry for this symbol in the .dynsym section. The dynamic
1223 object will contain position independent code, so all references
1224 from the dynamic object to this symbol will go through the global
1225 offset table. The dynamic linker will use the .dynsym entry to
1226 determine the address it must put in the global offset table, so
1227 both the dynamic object and the regular object will refer to the
1228 same memory location for the variable. */
1229
c434dee6 1230 htab = elf64_x86_64_hash_table (info);
70256ad8
AJ		 1231
1232 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
1233 to copy the initial value out of the dynamic object and into the
cedb70c5 1234 runtime process image. */
70256ad8
AJ		 1235 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1236 {
c434dee6 1237 htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
70256ad8
AJ		 1238 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1239 }
1240
1241 /* We need to figure out the alignment required for this symbol. I
407443a3 1242 have no idea how ELF linkers handle this. 16-bytes is the size
70256ad8
AJ		 1243 of the largest type that requires hard alignment -- long double. */
1244 /* FIXME: This is VERY ugly. Should be fixed for all architectures using
1245 this construct. */
1246 power_of_two = bfd_log2 (h->size);
1247 if (power_of_two > 4)
1248 power_of_two = 4;
1249
1250 /* Apply the required alignment. */
c434dee6 1251 s = htab->sdynbss;
70256ad8 1252 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
c434dee6 1253 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
70256ad8 1254 {
c434dee6 1255 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
b34976b6 1256 return FALSE;
70256ad8
AJ		 1257 }
1258
1259 /* Define the symbol as being at this point in the section. */
1260 h->root.u.def.section = s;
1261 h->root.u.def.value = s->_raw_size;
1262
1263 /* Increment the section size to make room for the symbol. */
1264 s->_raw_size += h->size;
1265
b34976b6 1266 return TRUE;
70256ad8
AJ		 1267}
1268
c434dee6
AJ		 1269/* This is the condition under which elf64_x86_64_finish_dynamic_symbol
1270 will be called from elflink.h. If elflink.h doesn't call our
1271 finish_dynamic_symbol routine, we'll need to do something about
1272 initializing any .plt and .got entries in elf64_x86_64_relocate_section. */
27482721 1273#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
c434dee6 1274 ((DYN) \
27482721 1275 && ((SHARED) \
c434dee6
AJ		 1276 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1277 && ((H)->dynindx != -1 \
1278 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1279
1280/* Allocate space in .plt, .got and associated reloc sections for
1281 dynamic relocs. */
1282
b34976b6 1283static bfd_boolean
27482721 1284allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 1285{
1286 struct bfd_link_info *info;
1287 struct elf64_x86_64_link_hash_table *htab;
1288 struct elf64_x86_64_link_hash_entry *eh;
1289 struct elf64_x86_64_dyn_relocs *p;
1290
e92d460e 1291 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1292 return TRUE;
c434dee6 1293
e92d460e
AM		 1294 if (h->root.type == bfd_link_hash_warning)
1295 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1296
c434dee6
AJ		 1297 info = (struct bfd_link_info *) inf;
1298 htab = elf64_x86_64_hash_table (info);
1299
1300 if (htab->elf.dynamic_sections_created
27482721 1301 && h->plt.refcount > 0)
c434dee6
AJ		 1302 {
1303 /* Make sure this symbol is output as a dynamic symbol.
1304 Undefined weak syms won't yet be marked as dynamic. */
1305 if (h->dynindx == -1
1306 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1307 {
1308 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
b34976b6 1309 return FALSE;
c434dee6
AJ		 1310 }
1311
27482721
AJ		 1312 if (info->shared
1313 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
c434dee6
AJ		 1314 {
1315 asection *s = htab->splt;
1316
1317 /* If this is the first .plt entry, make room for the special
1318 first entry. */
1319 if (s->_raw_size == 0)
1320 s->_raw_size += PLT_ENTRY_SIZE;
1321
1322 h->plt.offset = s->_raw_size;
1323
1324 /* If this symbol is not defined in a regular file, and we are
1325 not generating a shared library, then set the symbol to this
1326 location in the .plt. This is required to make function
1327 pointers compare as equal between the normal executable and
1328 the shared library. */
1329 if (! info->shared
1330 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1331 {
1332 h->root.u.def.section = s;
1333 h->root.u.def.value = h->plt.offset;
1334 }
1335
1336 /* Make room for this entry. */
1337 s->_raw_size += PLT_ENTRY_SIZE;
1338
1339 /* We also need to make an entry in the .got.plt section, which
1340 will be placed in the .got section by the linker script. */
1341 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1342
1343 /* We also need to make an entry in the .rela.plt section. */
1344 htab->srelplt->_raw_size += sizeof (Elf64_External_Rela);
1345 }
1346 else
1347 {
1348 h->plt.offset = (bfd_vma) -1;
1349 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1350 }
1351 }
1352 else
1353 {
1354 h->plt.offset = (bfd_vma) -1;
1355 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1356 }
1357
bffbf940
JJ		 1358 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
1359 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
1360 if (h->got.refcount > 0
1361 && !info->shared
1362 && h->dynindx == -1
1363 && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
1364 h->got.offset = (bfd_vma) -1;
1365 else if (h->got.refcount > 0)
c434dee6
AJ		 1366 {
1367 asection *s;
b34976b6 1368 bfd_boolean dyn;
bffbf940 1369 int tls_type = elf64_x86_64_hash_entry (h)->tls_type;
c434dee6
AJ		 1370
1371 /* Make sure this symbol is output as a dynamic symbol.
1372 Undefined weak syms won't yet be marked as dynamic. */
1373 if (h->dynindx == -1
1374 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1375 {
1376 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
b34976b6 1377 return FALSE;
c434dee6
AJ		 1378 }
1379
1380 s = htab->sgot;
1381 h->got.offset = s->_raw_size;
1382 s->_raw_size += GOT_ENTRY_SIZE;
bffbf940
JJ		 1383 /* R_X86_64_TLSGD needs 2 consecutive GOT slots. */
1384 if (tls_type == GOT_TLS_GD)
1385 s->_raw_size += GOT_ENTRY_SIZE;
c434dee6 1386 dyn = htab->elf.dynamic_sections_created;
bffbf940
JJ		 1387 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
1388 and two if global.
1389 R_X86_64_GOTTPOFF needs one dynamic relocation. */
1390 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1391 || tls_type == GOT_TLS_IE)
1392 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1393 else if (tls_type == GOT_TLS_GD)
1394 htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela);
4bc6e03a
AJ		 1395 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1396 || h->root.type != bfd_link_hash_undefweak)
27482721
AJ		 1397 && (info->shared
1398 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
c434dee6
AJ		 1399 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1400 }
1401 else
1402 h->got.offset = (bfd_vma) -1;
1403
1404 eh = (struct elf64_x86_64_link_hash_entry *) h;
1405 if (eh->dyn_relocs == NULL)
b34976b6 1406 return TRUE;
c434dee6
AJ		 1407
1408 /* In the shared -Bsymbolic case, discard space allocated for
1409 dynamic pc-relative relocs against symbols which turn out to be
1410 defined in regular objects. For the normal shared case, discard
1411 space for pc-relative relocs that have become local due to symbol
1412 visibility changes. */
1413
1414 if (info->shared)
1415 {
27482721
AJ		 1416 /* Relocs that use pc_count are those that appear on a call
1417 insn, or certain REL relocs that can generated via assembly.
1418 We want calls to protected symbols to resolve directly to the
1419 function rather than going via the plt. If people want
1420 function pointer comparisons to work as expected then they
1421 should avoid writing weird assembly. */
1422 if (SYMBOL_CALLS_LOCAL (info, h))
c434dee6
AJ		 1423 {
1424 struct elf64_x86_64_dyn_relocs **pp;
1425
1426 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1427 {
1428 p->count -= p->pc_count;
1429 p->pc_count = 0;
1430 if (p->count == 0)
1431 *pp = p->next;
1432 else
1433 pp = &p->next;
1434 }
1435 }
4e795f50
AM		 1436
1437 /* Also discard relocs on undefined weak syms with non-default
1438 visibility. */
1439 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1440 && h->root.type == bfd_link_hash_undefweak)
1441 eh->dyn_relocs = NULL;
c434dee6 1442 }
d40d037c 1443 else if (ELIMINATE_COPY_RELOCS)
c434dee6
AJ		 1444 {
1445 /* For the non-shared case, discard space for relocs against
1446 symbols which turn out to need copy relocs or are not
1447 dynamic. */
1448
1449 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1450 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1451 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1452 || (htab->elf.dynamic_sections_created
1453 && (h->root.type == bfd_link_hash_undefweak
1454 || h->root.type == bfd_link_hash_undefined))))
1455 {
1456 /* Make sure this symbol is output as a dynamic symbol.
1457 Undefined weak syms won't yet be marked as dynamic. */
1458 if (h->dynindx == -1
1459 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1460 {
1461 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
b34976b6 1462 return FALSE;
c434dee6
AJ		 1463 }
1464
1465 /* If that succeeded, we know we'll be keeping all the
1466 relocs. */
1467 if (h->dynindx != -1)
1468 goto keep;
1469 }
1470
1471 eh->dyn_relocs = NULL;
1472
1473 keep: ;
1474 }
1475
1476 /* Finally, allocate space. */
1477 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1478 {
1479 asection *sreloc = elf_section_data (p->sec)->sreloc;
1480 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
1481 }
1482
b34976b6 1483 return TRUE;
c434dee6
AJ		 1484}
1485
1486/* Find any dynamic relocs that apply to read-only sections. */
1487
b34976b6 1488static bfd_boolean
27482721 1489readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
c434dee6
AJ		 1490{
1491 struct elf64_x86_64_link_hash_entry *eh;
1492 struct elf64_x86_64_dyn_relocs *p;
1493
e92d460e
AM		 1494 if (h->root.type == bfd_link_hash_warning)
1495 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1496
c434dee6
AJ		 1497 eh = (struct elf64_x86_64_link_hash_entry *) h;
1498 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1499 {
1500 asection *s = p->sec->output_section;
1501
1502 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1503 {
1504 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1505
1506 info->flags |= DF_TEXTREL;
1507
1508 /* Not an error, just cut short the traversal. */
b34976b6 1509 return FALSE;
c434dee6
AJ		 1510 }
1511 }
b34976b6 1512 return TRUE;
c434dee6
AJ		 1513}
1514
70256ad8
AJ		 1515/* Set the sizes of the dynamic sections. */
1516
b34976b6 1517static bfd_boolean
27482721
AJ		 1518elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1519 struct bfd_link_info *info)
70256ad8 1520{
c434dee6 1521 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 1522 bfd *dynobj;
1523 asection *s;
b34976b6 1524 bfd_boolean relocs;
c434dee6 1525 bfd *ibfd;
70256ad8 1526
c434dee6
AJ		 1527 htab = elf64_x86_64_hash_table (info);
1528 dynobj = htab->elf.dynobj;
1529 if (dynobj == NULL)
1530 abort ();
70256ad8 1531
c434dee6 1532 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 1533 {
1534 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 1535 if (info->executable)
70256ad8
AJ		 1536 {
1537 s = bfd_get_section_by_name (dynobj, ".interp");
c434dee6
AJ		 1538 if (s == NULL)
1539 abort ();
70256ad8
AJ		 1540 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1541 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1542 }
1543 }
70256ad8 1544
c434dee6
AJ		 1545 /* Set up .got offsets for local syms, and space for local dynamic
1546 relocs. */
1547 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
70256ad8 1548 {
c434dee6
AJ		 1549 bfd_signed_vma *local_got;
1550 bfd_signed_vma *end_local_got;
bffbf940 1551 char *local_tls_type;
c434dee6
AJ		 1552 bfd_size_type locsymcount;
1553 Elf_Internal_Shdr *symtab_hdr;
1554 asection *srel;
70256ad8 1555
c434dee6 1556 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
70256ad8
AJ		 1557 continue;
1558
c434dee6 1559 for (s = ibfd->sections; s != NULL; s = s->next)
70256ad8 1560 {
c434dee6
AJ		 1561 struct elf64_x86_64_dyn_relocs *p;
1562
1563 for (p = *((struct elf64_x86_64_dyn_relocs **)
1564 &elf_section_data (s)->local_dynrel);
1565 p != NULL;
1566 p = p->next)
70256ad8 1567 {
c434dee6
AJ		 1568 if (!bfd_is_abs_section (p->sec)
1569 && bfd_is_abs_section (p->sec->output_section))
1570 {
1571 /* Input section has been discarded, either because
1572 it is a copy of a linkonce section or due to
1573 linker script /DISCARD/, so we'll be discarding
1574 the relocs too. */
1575 }
1576 else if (p->count != 0)
1577 {
1578 srel = elf_section_data (p->sec)->sreloc;
1579 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
1580 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1581 info->flags |= DF_TEXTREL;
1582
1583 }
70256ad8
AJ		 1584 }
1585 }
c434dee6
AJ		 1586
1587 local_got = elf_local_got_refcounts (ibfd);
1588 if (!local_got)
1589 continue;
1590
1591 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1592 locsymcount = symtab_hdr->sh_info;
1593 end_local_got = local_got + locsymcount;
bffbf940 1594 local_tls_type = elf64_x86_64_local_got_tls_type (ibfd);
c434dee6
AJ		 1595 s = htab->sgot;
1596 srel = htab->srelgot;
bffbf940 1597 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
70256ad8 1598 {
c434dee6 1599 if (*local_got > 0)
70256ad8 1600 {
c434dee6
AJ		 1601 *local_got = s->_raw_size;
1602 s->_raw_size += GOT_ENTRY_SIZE;
bffbf940
JJ		 1603 if (*local_tls_type == GOT_TLS_GD)
1604 s->_raw_size += GOT_ENTRY_SIZE;
1605 if (info->shared
1606 || *local_tls_type == GOT_TLS_GD
1607 || *local_tls_type == GOT_TLS_IE)
c434dee6 1608 srel->_raw_size += sizeof (Elf64_External_Rela);
70256ad8
AJ		 1609 }
1610 else
c434dee6
AJ		 1611 *local_got = (bfd_vma) -1;
1612 }
1613 }
70256ad8 1614
bffbf940
JJ		 1615 if (htab->tls_ld_got.refcount > 0)
1616 {
1617 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
1618 relocs. */
1619 htab->tls_ld_got.offset = htab->sgot->_raw_size;
1620 htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
1621 htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
1622 }
1623 else
1624 htab->tls_ld_got.offset = -1;
1625
c434dee6
AJ		 1626 /* Allocate global sym .plt and .got entries, and space for global
1627 sym dynamic relocs. */
1628 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1629
1630 /* We now have determined the sizes of the various dynamic sections.
1631 Allocate memory for them. */
b34976b6 1632 relocs = FALSE;
c434dee6
AJ		 1633 for (s = dynobj->sections; s != NULL; s = s->next)
1634 {
1635 if ((s->flags & SEC_LINKER_CREATED) == 0)
1636 continue;
1637
1638 if (s == htab->splt
1639 || s == htab->sgot
1640 || s == htab->sgotplt)
1641 {
1642 /* Strip this section if we don't need it; see the
1643 comment below. */
1644 }
1645 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
1646 {
1647 if (s->_raw_size != 0 && s != htab->srelplt)
b34976b6 1648 relocs = TRUE;
c434dee6
AJ		 1649
1650 /* We use the reloc_count field as a counter if we need
1651 to copy relocs into the output file. */
1652 s->reloc_count = 0;
70256ad8 1653 }
c434dee6 1654 else
70256ad8
AJ		 1655 {
1656 /* It's not one of our sections, so don't allocate space. */
1657 continue;
1658 }
1659
c434dee6 1660 if (s->_raw_size == 0)
70256ad8 1661 {
c434dee6
AJ		 1662 /* If we don't need this section, strip it from the
1663 output file. This is mostly to handle .rela.bss and
1664 .rela.plt. We must create both sections in
1665 create_dynamic_sections, because they must be created
1666 before the linker maps input sections to output
1667 sections. The linker does that before
1668 adjust_dynamic_symbol is called, and it is that
1669 function which decides whether anything needs to go
1670 into these sections. */
1671
70256ad8
AJ		 1672 _bfd_strip_section_from_output (info, s);
1673 continue;
1674 }
1675
1676 /* Allocate memory for the section contents. We use bfd_zalloc
1677 here in case unused entries are not reclaimed before the
1678 section's contents are written out. This should not happen,
1679 but this way if it does, we get a R_X86_64_NONE reloc instead
1680 of garbage. */
1681 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
c434dee6 1682 if (s->contents == NULL)
b34976b6 1683 return FALSE;
70256ad8
AJ		 1684 }
1685
c434dee6 1686 if (htab->elf.dynamic_sections_created)
70256ad8
AJ		 1687 {
1688 /* Add some entries to the .dynamic section. We fill in the
1689 values later, in elf64_x86_64_finish_dynamic_sections, but we
1690 must add the entries now so that we get the correct size for
407443a3 1691 the .dynamic section. The DT_DEBUG entry is filled in by the
70256ad8 1692 dynamic linker and used by the debugger. */
dc810e39
AM		 1693#define add_dynamic_entry(TAG, VAL) \
1694 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1695
36af4a4e 1696 if (info->executable)
70256ad8 1697 {
dc810e39 1698 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 1699 return FALSE;
70256ad8
AJ		 1700 }
1701
c434dee6 1702 if (htab->splt->_raw_size != 0)
70256ad8 1703 {
dc810e39
AM		 1704 if (!add_dynamic_entry (DT_PLTGOT, 0)
1705 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1706 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1707 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 1708 return FALSE;
70256ad8
AJ		 1709 }
1710
1711 if (relocs)
1712 {
dc810e39
AM		 1713 if (!add_dynamic_entry (DT_RELA, 0)
1714 || !add_dynamic_entry (DT_RELASZ, 0)
1715 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
b34976b6 1716 return FALSE;
70256ad8 1717
c434dee6
AJ		 1718 /* If any dynamic relocs apply to a read-only section,
1719 then we need a DT_TEXTREL entry. */
1720 if ((info->flags & DF_TEXTREL) == 0)
1721 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1722 (PTR) info);
1723
1724 if ((info->flags & DF_TEXTREL) != 0)
1725 {
1726 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 1727 return FALSE;
c434dee6 1728 }
70256ad8
AJ		 1729 }
1730 }
dc810e39 1731#undef add_dynamic_entry
70256ad8 1732
b34976b6 1733 return TRUE;
70256ad8
AJ		 1734}
1735
bffbf940
JJ		 1736/* Return the base VMA address which should be subtracted from real addresses
1737 when resolving @dtpoff relocation.
1738 This is PT_TLS segment p_vaddr. */
1739
1740static bfd_vma
27482721 1741dtpoff_base (struct bfd_link_info *info)
bffbf940 1742{
e1918d23
AM		 1743 /* If tls_sec is NULL, we should have signalled an error already. */
1744 if (elf_hash_table (info)->tls_sec == NULL)
bffbf940 1745 return 0;
e1918d23 1746 return elf_hash_table (info)->tls_sec->vma;
bffbf940
JJ		 1747}
1748
1749/* Return the relocation value for @tpoff relocation
1750 if STT_TLS virtual address is ADDRESS. */
1751
1752static bfd_vma
27482721 1753tpoff (struct bfd_link_info *info, bfd_vma address)
bffbf940 1754{
e1918d23 1755 struct elf_link_hash_table *htab = elf_hash_table (info);
bffbf940
JJ		 1756
1757 /* If tls_segment is NULL, we should have signalled an error already. */
e1918d23 1758 if (htab->tls_sec == NULL)
bffbf940 1759 return 0;
e1918d23 1760 return address - htab->tls_size - htab->tls_sec->vma;
bffbf940
JJ		 1761}
1762
8d88c4ca
NC		 1763/* Relocate an x86_64 ELF section. */
1764
b34976b6 1765static bfd_boolean
27482721
AJ		 1766elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
1767 bfd *input_bfd, asection *input_section,
1768 bfd_byte *contents, Elf_Internal_Rela *relocs,
1769 Elf_Internal_Sym *local_syms,
1770 asection **local_sections)
8d88c4ca 1771{
c434dee6 1772 struct elf64_x86_64_link_hash_table *htab;
8d88c4ca
NC		 1773 Elf_Internal_Shdr *symtab_hdr;
1774 struct elf_link_hash_entry **sym_hashes;
1775 bfd_vma *local_got_offsets;
c434dee6 1776 Elf_Internal_Rela *rel;
8d88c4ca
NC		 1777 Elf_Internal_Rela *relend;
1778
1049f94e 1779 if (info->relocatable)
b34976b6 1780 return TRUE;
b491616a 1781
c434dee6 1782 htab = elf64_x86_64_hash_table (info);
8d88c4ca
NC		 1783 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1784 sym_hashes = elf_sym_hashes (input_bfd);
1785 local_got_offsets = elf_local_got_offsets (input_bfd);
1786
c434dee6 1787 rel = relocs;
8d88c4ca 1788 relend = relocs + input_section->reloc_count;
c434dee6 1789 for (; rel < relend; rel++)
8d88c4ca 1790 {
bffbf940 1791 unsigned int r_type;
8d88c4ca
NC		 1792 reloc_howto_type *howto;
1793 unsigned long r_symndx;
1794 struct elf_link_hash_entry *h;
1795 Elf_Internal_Sym *sym;
1796 asection *sec;
c434dee6 1797 bfd_vma off;
8d88c4ca 1798 bfd_vma relocation;
b34976b6 1799 bfd_boolean unresolved_reloc;
8d88c4ca 1800 bfd_reloc_status_type r;
bffbf940 1801 int tls_type;
8d88c4ca 1802
c434dee6 1803 r_type = ELF64_R_TYPE (rel->r_info);
fe4770f4
AJ		 1804 if (r_type == (int) R_X86_64_GNU_VTINHERIT
1805 || r_type == (int) R_X86_64_GNU_VTENTRY)
1806 continue;
8d88c4ca 1807
bffbf940 1808 if (r_type >= R_X86_64_max)
8da6118f
KH		 1809 {
1810 bfd_set_error (bfd_error_bad_value);
b34976b6 1811 return FALSE;
8da6118f 1812 }
8d88c4ca 1813
b491616a 1814 howto = x86_64_elf_howto_table + r_type;
c434dee6 1815 r_symndx = ELF64_R_SYM (rel->r_info);
8d88c4ca
NC		 1816 h = NULL;
1817 sym = NULL;
1818 sec = NULL;
b34976b6 1819 unresolved_reloc = FALSE;
8d88c4ca 1820 if (r_symndx < symtab_hdr->sh_info)
8da6118f
KH		 1821 {
1822 sym = local_syms + r_symndx;
1823 sec = local_sections[r_symndx];
c434dee6 1824
8517fae7 1825 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8da6118f 1826 }
8d88c4ca 1827 else
8da6118f 1828 {
560e09e9 1829 bfd_boolean warned;
c434dee6 1830
560e09e9
NC		 1831 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
1832 symtab_hdr, relocation, sec,
1833 unresolved_reloc, info,
1834 warned);
8da6118f 1835 }
70256ad8
AJ		 1836 /* When generating a shared object, the relocations handled here are
1837 copied into the output file to be resolved at run time. */
1838 switch (r_type)
1839 {
1840 case R_X86_64_GOT32:
1841 /* Relocation is to the entry for this symbol in the global
1842 offset table. */
70256ad8
AJ		 1843 case R_X86_64_GOTPCREL:
1844 /* Use global offset table as symbol value. */
c434dee6
AJ		 1845 if (htab->sgot == NULL)
1846 abort ();
053579d7 1847
51e0a107 1848 if (h != NULL)
70256ad8 1849 {
b34976b6 1850 bfd_boolean dyn;
c434dee6
AJ		 1851
1852 off = h->got.offset;
1853 dyn = htab->elf.dynamic_sections_created;
51e0a107 1854
27482721 1855 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
51e0a107 1856 || (info->shared
27482721 1857 && SYMBOL_REFERENCES_LOCAL (info, h))
4bc6e03a
AJ		 1858 || (ELF_ST_VISIBILITY (h->other)
1859 && h->root.type == bfd_link_hash_undefweak))
51e0a107
JH		 1860 {
1861 /* This is actually a static link, or it is a -Bsymbolic
1862 link and the symbol is defined locally, or the symbol
407443a3 1863 was forced to be local because of a version file. We
51e0a107
JH		 1864 must initialize this entry in the global offset table.
1865 Since the offset must always be a multiple of 8, we
1866 use the least significant bit to record whether we
1867 have initialized it already.
1868
1869 When doing a dynamic link, we create a .rela.got
407443a3
AJ		 1870 relocation entry to initialize the value. This is
1871 done in the finish_dynamic_symbol routine. */
51e0a107
JH		 1872 if ((off & 1) != 0)
1873 off &= ~1;
1874 else
1875 {
1876 bfd_put_64 (output_bfd, relocation,
c434dee6 1877 htab->sgot->contents + off);
51e0a107
JH		 1878 h->got.offset |= 1;
1879 }
1880 }
053579d7 1881 else
b34976b6 1882 unresolved_reloc = FALSE;
70256ad8 1883 }
51e0a107
JH		 1884 else
1885 {
c434dee6
AJ		 1886 if (local_got_offsets == NULL)
1887 abort ();
51e0a107
JH		 1888
1889 off = local_got_offsets[r_symndx];
1890
1891 /* The offset must always be a multiple of 8. We use
407443a3
AJ		 1892 the least significant bit to record whether we have
1893 already generated the necessary reloc. */
51e0a107
JH		 1894 if ((off & 1) != 0)
1895 off &= ~1;
1896 else
1897 {
c434dee6
AJ		 1898 bfd_put_64 (output_bfd, relocation,
1899 htab->sgot->contents + off);
51e0a107
JH		 1900
1901 if (info->shared)
1902 {
947216bf 1903 asection *s;
51e0a107 1904 Elf_Internal_Rela outrel;
947216bf 1905 bfd_byte *loc;
70256ad8 1906
51e0a107
JH		 1907 /* We need to generate a R_X86_64_RELATIVE reloc
1908 for the dynamic linker. */
947216bf
AM		 1909 s = htab->srelgot;
1910 if (s == NULL)
c434dee6 1911 abort ();
51e0a107 1912
c434dee6
AJ		 1913 outrel.r_offset = (htab->sgot->output_section->vma
1914 + htab->sgot->output_offset
51e0a107
JH		 1915 + off);
1916 outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
1917 outrel.r_addend = relocation;
947216bf
AM		 1918 loc = s->contents;
1919 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 1920 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
51e0a107
JH		 1921 }
1922
1923 local_got_offsets[r_symndx] |= 1;
1924 }
51e0a107 1925 }
6a2bda3f 1926
c434dee6
AJ		 1927 if (off >= (bfd_vma) -2)
1928 abort ();
1929
1930 relocation = htab->sgot->output_offset + off;
1931 if (r_type == R_X86_64_GOTPCREL)
1932 relocation += htab->sgot->output_section->vma;
1933
70256ad8
AJ		 1934 break;
1935
1936 case R_X86_64_PLT32:
1937 /* Relocation is to the entry for this symbol in the
1938 procedure linkage table. */
1939
1940 /* Resolve a PLT32 reloc against a local symbol directly,
407443a3 1941 without using the procedure linkage table. */
70256ad8
AJ		 1942 if (h == NULL)
1943 break;
1944
c434dee6
AJ		 1945 if (h->plt.offset == (bfd_vma) -1
1946 || htab->splt == NULL)
70256ad8
AJ		 1947 {
1948 /* We didn't make a PLT entry for this symbol. This
407443a3
AJ		 1949 happens when statically linking PIC code, or when
1950 using -Bsymbolic. */
70256ad8
AJ		 1951 break;
1952 }
1953
c434dee6
AJ		 1954 relocation = (htab->splt->output_section->vma
1955 + htab->splt->output_offset
70256ad8 1956 + h->plt.offset);
b34976b6 1957 unresolved_reloc = FALSE;
70256ad8
AJ		 1958 break;
1959
fd8ab9e5
AJ		 1960 case R_X86_64_PC8:
1961 case R_X86_64_PC16:
1962 case R_X86_64_PC32:
70256ad8
AJ		 1963 case R_X86_64_8:
1964 case R_X86_64_16:
1965 case R_X86_64_32:
6b3db546 1966 case R_X86_64_64:
80643fbc 1967 /* FIXME: The ABI says the linker should make sure the value is
407443a3 1968 the same when it's zeroextended to 64 bit. */
c434dee6
AJ		 1969
1970 /* r_symndx will be zero only for relocs against symbols
1971 from removed linkonce sections, or sections discarded by
1972 a linker script. */
1973 if (r_symndx == 0
1974 || (input_section->flags & SEC_ALLOC) == 0)
1975 break;
1976
1977 if ((info->shared
4bc6e03a
AJ		 1978 && (h == NULL
1979 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1980 || h->root.type != bfd_link_hash_undefweak)
c434dee6
AJ		 1981 && ((r_type != R_X86_64_PC8
1982 && r_type != R_X86_64_PC16
1983 && r_type != R_X86_64_PC32)
f6c52c13 1984 || !SYMBOL_CALLS_LOCAL (info, h)))
d40d037c
AJ		 1985 || (ELIMINATE_COPY_RELOCS
1986 && !info->shared
c434dee6
AJ		 1987 && h != NULL
1988 && h->dynindx != -1
1989 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1990 && (((h->elf_link_hash_flags
1991 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1992 && (h->elf_link_hash_flags
1993 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1994 || h->root.type == bfd_link_hash_undefweak
1995 || h->root.type == bfd_link_hash_undefined)))
70256ad8
AJ		 1996 {
1997 Elf_Internal_Rela outrel;
947216bf 1998 bfd_byte *loc;
b34976b6 1999 bfd_boolean skip, relocate;
c434dee6 2000 asection *sreloc;
70256ad8
AJ		 2001
2002 /* When generating a shared object, these relocations
2003 are copied into the output file to be resolved at run
407443a3 2004 time. */
b34976b6
AM		 2005 skip = FALSE;
2006 relocate = FALSE;
70256ad8 2007
c629eae0
JJ		 2008 outrel.r_offset =
2009 _bfd_elf_section_offset (output_bfd, info, input_section,
c434dee6 2010 rel->r_offset);
c629eae0 2011 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2012 skip = TRUE;
0fb19cbc 2013 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2014 skip = TRUE, relocate = TRUE;
70256ad8
AJ		 2015
2016 outrel.r_offset += (input_section->output_section->vma
2017 + input_section->output_offset);
2018
2019 if (skip)
0bb2d96a 2020 memset (&outrel, 0, sizeof outrel);
c434dee6 2021
fd8ab9e5
AJ		 2022 /* h->dynindx may be -1 if this symbol was marked to
2023 become local. */
2024 else if (h != NULL
c434dee6
AJ		 2025 && h->dynindx != -1
2026 && (r_type == R_X86_64_PC8
2027 || r_type == R_X86_64_PC16
2028 || r_type == R_X86_64_PC32
2029 || !info->shared
2030 || !info->symbolic
fd8ab9e5
AJ		 2031 || (h->elf_link_hash_flags
2032 & ELF_LINK_HASH_DEF_REGULAR) == 0))
70256ad8 2033 {
70256ad8 2034 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
c434dee6 2035 outrel.r_addend = rel->r_addend;
70256ad8
AJ		 2036 }
2037 else
2038 {
c434dee6 2039 /* This symbol is local, or marked to become local. */
607c0e09
AS		 2040 if (r_type == R_X86_64_64)
2041 {
b34976b6 2042 relocate = TRUE;
607c0e09
AS		 2043 outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
2044 outrel.r_addend = relocation + rel->r_addend;
2045 }
2046 else
2047 {
2048 long sindx;
2049
8517fae7 2050 if (bfd_is_abs_section (sec))
607c0e09
AS		 2051 sindx = 0;
2052 else if (sec == NULL || sec->owner == NULL)
2053 {
2054 bfd_set_error (bfd_error_bad_value);
b34976b6 2055 return FALSE;
607c0e09
AS		 2056 }
2057 else
2058 {
2059 asection *osec;
2060
2061 osec = sec->output_section;
2062 sindx = elf_section_data (osec)->dynindx;
2063 BFD_ASSERT (sindx > 0);
2064 }
2065
2066 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2067 outrel.r_addend = relocation + rel->r_addend;
2068 }
70256ad8
AJ		 2069 }
2070
c434dee6
AJ		 2071 sreloc = elf_section_data (input_section)->sreloc;
2072 if (sreloc == NULL)
2073 abort ();
2074
947216bf
AM		 2075 loc = sreloc->contents;
2076 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 2077 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
70256ad8
AJ		 2078
2079 /* If this reloc is against an external symbol, we do
2080 not want to fiddle with the addend. Otherwise, we
2081 need to include the symbol value so that it becomes
2082 an addend for the dynamic reloc. */
2083 if (! relocate)
2084 continue;
2085 }
2086
2087 break;
2088
bffbf940
JJ		 2089 case R_X86_64_TLSGD:
2090 case R_X86_64_GOTTPOFF:
2091 r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL);
2092 tls_type = GOT_UNKNOWN;
2093 if (h == NULL && local_got_offsets)
2094 tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx];
2095 else if (h != NULL)
2096 {
2097 tls_type = elf64_x86_64_hash_entry (h)->tls_type;
2098 if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE)
2099 r_type = R_X86_64_TPOFF32;
2100 }
2101 if (r_type == R_X86_64_TLSGD)
2102 {
2103 if (tls_type == GOT_TLS_IE)
2104 r_type = R_X86_64_GOTTPOFF;
2105 }
2106
2107 if (r_type == R_X86_64_TPOFF32)
2108 {
2109 BFD_ASSERT (! unresolved_reloc);
2110 if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
2111 {
2112 unsigned int i;
abcf1d52
JJ		 2113 static unsigned char tlsgd[8]
2114 = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 };
bffbf940
JJ		 2115
2116 /* GD->LE transition.
abcf1d52
JJ		 2117 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
2118 .word 0x6666; rex64; call __tls_get_addr@plt
bffbf940
JJ		 2119 Change it into:
2120 movq %fs:0, %rax
2121 leaq foo@tpoff(%rax), %rax */
abcf1d52
JJ		 2122 BFD_ASSERT (rel->r_offset >= 4);
2123 for (i = 0; i < 4; i++)
bffbf940 2124 BFD_ASSERT (bfd_get_8 (input_bfd,
abcf1d52 2125 contents + rel->r_offset - 4 + i)
bffbf940 2126 == tlsgd[i]);
abcf1d52
JJ		 2127 BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size);
2128 for (i = 0; i < 4; i++)
2129 BFD_ASSERT (bfd_get_8 (input_bfd,
2130 contents + rel->r_offset + 4 + i)
2131 == tlsgd[i+4]);
bffbf940
JJ		 2132 BFD_ASSERT (rel + 1 < relend);
2133 BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
abcf1d52 2134 memcpy (contents + rel->r_offset - 4,
bffbf940
JJ		 2135 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
2136 16);
2137 bfd_put_32 (output_bfd, tpoff (info, relocation),
abcf1d52 2138 contents + rel->r_offset + 8);
bffbf940
JJ		 2139 /* Skip R_X86_64_PLT32. */
2140 rel++;
2141 continue;
2142 }
2143 else
2144 {
2145 unsigned int val, type, reg;
2146
2147 /* IE->LE transition:
2148 Originally it can be one of:
2149 movq foo@gottpoff(%rip), %reg
2150 addq foo@gottpoff(%rip), %reg
2151 We change it into:
2152 movq $foo, %reg
2153 leaq foo(%reg), %reg
2154 addq $foo, %reg. */
2155 BFD_ASSERT (rel->r_offset >= 3);
2156 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3);
2157 BFD_ASSERT (val == 0x48 || val == 0x4c);
2158 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2159 BFD_ASSERT (type == 0x8b || type == 0x03);
2160 reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2161 BFD_ASSERT ((reg & 0xc7) == 5);
2162 reg >>= 3;
2163 BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
2164 if (type == 0x8b)
2165 {
2166 /* movq */
2167 if (val == 0x4c)
2168 bfd_put_8 (output_bfd, 0x49,
2169 contents + rel->r_offset - 3);
2170 bfd_put_8 (output_bfd, 0xc7,
2171 contents + rel->r_offset - 2);
2172 bfd_put_8 (output_bfd, 0xc0 | reg,
2173 contents + rel->r_offset - 1);
2174 }
2175 else if (reg == 4)
2176 {
2177 /* addq -> addq - addressing with %rsp/%r12 is
2178 special */
2179 if (val == 0x4c)
2180 bfd_put_8 (output_bfd, 0x49,
2181 contents + rel->r_offset - 3);
2182 bfd_put_8 (output_bfd, 0x81,
2183 contents + rel->r_offset - 2);
2184 bfd_put_8 (output_bfd, 0xc0 | reg,
2185 contents + rel->r_offset - 1);
2186 }
2187 else
2188 {
2189 /* addq -> leaq */
2190 if (val == 0x4c)
2191 bfd_put_8 (output_bfd, 0x4d,
2192 contents + rel->r_offset - 3);
2193 bfd_put_8 (output_bfd, 0x8d,
2194 contents + rel->r_offset - 2);
2195 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
2196 contents + rel->r_offset - 1);
2197 }
2198 bfd_put_32 (output_bfd, tpoff (info, relocation),
2199 contents + rel->r_offset);
2200 continue;
2201 }
2202 }
2203
2204 if (htab->sgot == NULL)
2205 abort ();
2206
2207 if (h != NULL)
2208 off = h->got.offset;
2209 else
2210 {
2211 if (local_got_offsets == NULL)
2212 abort ();
2213
2214 off = local_got_offsets[r_symndx];
2215 }
2216
2217 if ((off & 1) != 0)
2218 off &= ~1;
26e41594 2219 else
bffbf940
JJ		 2220 {
2221 Elf_Internal_Rela outrel;
947216bf 2222 bfd_byte *loc;
bffbf940
JJ		 2223 int dr_type, indx;
2224
2225 if (htab->srelgot == NULL)
2226 abort ();
2227
2228 outrel.r_offset = (htab->sgot->output_section->vma
2229 + htab->sgot->output_offset + off);
2230
2231 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2232 if (r_type == R_X86_64_TLSGD)
2233 dr_type = R_X86_64_DTPMOD64;
2234 else
2235 dr_type = R_X86_64_TPOFF64;
2236
2237 bfd_put_64 (output_bfd, 0, htab->sgot->contents + off);
2238 outrel.r_addend = 0;
2239 if (dr_type == R_X86_64_TPOFF64 && indx == 0)
2240 outrel.r_addend = relocation - dtpoff_base (info);
2241 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2242
947216bf
AM		 2243 loc = htab->srelgot->contents;
2244 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
bffbf940
JJ		 2245 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2246
2247 if (r_type == R_X86_64_TLSGD)
2248 {
2249 if (indx == 0)
2250 {
d40d037c 2251 BFD_ASSERT (! unresolved_reloc);
bffbf940
JJ		 2252 bfd_put_64 (output_bfd,
2253 relocation - dtpoff_base (info),
2254 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2255 }
2256 else
2257 {
2258 bfd_put_64 (output_bfd, 0,
2259 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2260 outrel.r_info = ELF64_R_INFO (indx,
2261 R_X86_64_DTPOFF64);
2262 outrel.r_offset += GOT_ENTRY_SIZE;
2263 htab->srelgot->reloc_count++;
947216bf
AM		 2264 loc += sizeof (Elf64_External_Rela);
2265 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
bffbf940
JJ		 2266 }
2267 }
2268
2269 if (h != NULL)
2270 h->got.offset |= 1;
2271 else
2272 local_got_offsets[r_symndx] |= 1;
2273 }
2274
2275 if (off >= (bfd_vma) -2)
2276 abort ();
2277 if (r_type == ELF64_R_TYPE (rel->r_info))
2278 {
2279 relocation = htab->sgot->output_section->vma
2280 + htab->sgot->output_offset + off;
b34976b6 2281 unresolved_reloc = FALSE;
bffbf940
JJ		 2282 }
2283 else
2284 {
2285 unsigned int i;
abcf1d52
JJ		 2286 static unsigned char tlsgd[8]
2287 = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 };
bffbf940
JJ		 2288
2289 /* GD->IE transition.
abcf1d52
JJ		 2290 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
2291 .word 0x6666; rex64; call __tls_get_addr@plt
bffbf940
JJ		 2292 Change it into:
2293 movq %fs:0, %rax
2294 addq foo@gottpoff(%rip), %rax */
abcf1d52
JJ		 2295 BFD_ASSERT (rel->r_offset >= 4);
2296 for (i = 0; i < 4; i++)
26e41594 2297 BFD_ASSERT (bfd_get_8 (input_bfd,
abcf1d52 2298 contents + rel->r_offset - 4 + i)
bffbf940 2299 == tlsgd[i]);
abcf1d52
JJ		 2300 BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size);
2301 for (i = 0; i < 4; i++)
26e41594 2302 BFD_ASSERT (bfd_get_8 (input_bfd,
abcf1d52
JJ		 2303 contents + rel->r_offset + 4 + i)
2304 == tlsgd[i+4]);
bffbf940
JJ		 2305 BFD_ASSERT (rel + 1 < relend);
2306 BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
abcf1d52 2307 memcpy (contents + rel->r_offset - 4,
bffbf940
JJ		 2308 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
2309 16);
2310
2311 relocation = (htab->sgot->output_section->vma
2312 + htab->sgot->output_offset + off
2313 - rel->r_offset
2314 - input_section->output_section->vma
2315 - input_section->output_offset
abcf1d52 2316 - 12);
bffbf940 2317 bfd_put_32 (output_bfd, relocation,
abcf1d52 2318 contents + rel->r_offset + 8);
bffbf940
JJ		 2319 /* Skip R_X86_64_PLT32. */
2320 rel++;
2321 continue;
2322 }
2323 break;
2324
2325 case R_X86_64_TLSLD:
2326 if (! info->shared)
2327 {
2328 /* LD->LE transition:
2329 Ensure it is:
2330 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt.
2331 We change it into:
2332 .word 0x6666; .byte 0x66; movl %fs:0, %rax. */
2333 BFD_ASSERT (rel->r_offset >= 3);
2334 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3)
2335 == 0x48);
2336 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
2337 == 0x8d);
2338 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1)
2339 == 0x3d);
2340 BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2341 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2342 == 0xe8);
2343 BFD_ASSERT (rel + 1 < relend);
2344 BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
2345 memcpy (contents + rel->r_offset - 3,
2346 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
2347 /* Skip R_X86_64_PLT32. */
2348 rel++;
2349 continue;
2350 }
2351
2352 if (htab->sgot == NULL)
2353 abort ();
2354
2355 off = htab->tls_ld_got.offset;
2356 if (off & 1)
2357 off &= ~1;
2358 else
2359 {
2360 Elf_Internal_Rela outrel;
947216bf 2361 bfd_byte *loc;
bffbf940
JJ		 2362
2363 if (htab->srelgot == NULL)
2364 abort ();
2365
2366 outrel.r_offset = (htab->sgot->output_section->vma
2367 + htab->sgot->output_offset + off);
2368
2369 bfd_put_64 (output_bfd, 0,
2370 htab->sgot->contents + off);
2371 bfd_put_64 (output_bfd, 0,
2372 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2373 outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64);
2374 outrel.r_addend = 0;
947216bf
AM		 2375 loc = htab->srelgot->contents;
2376 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
bffbf940
JJ		 2377 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2378 htab->tls_ld_got.offset |= 1;
2379 }
2380 relocation = htab->sgot->output_section->vma
2381 + htab->sgot->output_offset + off;
b34976b6 2382 unresolved_reloc = FALSE;
bffbf940
JJ		 2383 break;
2384
2385 case R_X86_64_DTPOFF32:
a45bb67d 2386 if (info->shared || (input_section->flags & SEC_CODE) == 0)
bffbf940
JJ		 2387 relocation -= dtpoff_base (info);
2388 else
2389 relocation = tpoff (info, relocation);
2390 break;
2391
2392 case R_X86_64_TPOFF32:
2393 BFD_ASSERT (! info->shared);
2394 relocation = tpoff (info, relocation);
2395 break;
2396
70256ad8
AJ		 2397 default:
2398 break;
2399 }
8d88c4ca 2400
239e1f3a
AM		 2401 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2402 because such sections are not SEC_ALLOC and thus ld.so will
2403 not process them. */
c434dee6 2404 if (unresolved_reloc
239e1f3a 2405 && !((input_section->flags & SEC_DEBUGGING) != 0
c434dee6
AJ		 2406 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2407 (*_bfd_error_handler)
2408 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2409 bfd_archive_filename (input_bfd),
2410 bfd_get_section_name (input_bfd, input_section),
2411 (long) rel->r_offset,
2412 h->root.root.string);
2413
8d88c4ca 2414 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
c434dee6
AJ		 2415 contents, rel->r_offset,
2416 relocation, rel->r_addend);
8d88c4ca
NC		 2417
2418 if (r != bfd_reloc_ok)
8da6118f 2419 {
c434dee6
AJ		 2420 const char *name;
2421
2422 if (h != NULL)
2423 name = h->root.root.string;
2424 else
8da6118f 2425 {
c434dee6
AJ		 2426 name = bfd_elf_string_from_elf_section (input_bfd,
2427 symtab_hdr->sh_link,
2428 sym->st_name);
2429 if (name == NULL)
b34976b6 2430 return FALSE;
c434dee6
AJ		 2431 if (*name == '\0')
2432 name = bfd_section_name (input_bfd, sec);
2433 }
2434
2435 if (r == bfd_reloc_overflow)
2436 {
2437
2438 if (! ((*info->callbacks->reloc_overflow)
2439 (info, name, howto->name, (bfd_vma) 0,
2440 input_bfd, input_section, rel->r_offset)))
b34976b6 2441 return FALSE;
c434dee6
AJ		 2442 }
2443 else
2444 {
2445 (*_bfd_error_handler)
2446 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2447 bfd_archive_filename (input_bfd),
2448 bfd_get_section_name (input_bfd, input_section),
2449 (long) rel->r_offset, name, (int) r);
b34976b6 2450 return FALSE;
8da6118f
KH		 2451 }
2452 }
8d88c4ca 2453 }
70256ad8 2454
b34976b6 2455 return TRUE;
70256ad8
AJ		 2456}
2457
2458/* Finish up dynamic symbol handling. We set the contents of various
2459 dynamic sections here. */
2460
b34976b6 2461static bfd_boolean
27482721
AJ		 2462elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd,
2463 struct bfd_link_info *info,
2464 struct elf_link_hash_entry *h,
2465 Elf_Internal_Sym *sym)
70256ad8 2466{
c434dee6 2467 struct elf64_x86_64_link_hash_table *htab;
70256ad8 2468
c434dee6 2469 htab = elf64_x86_64_hash_table (info);
70256ad8
AJ		 2470
2471 if (h->plt.offset != (bfd_vma) -1)
2472 {
70256ad8
AJ		 2473 bfd_vma plt_index;
2474 bfd_vma got_offset;
2475 Elf_Internal_Rela rela;
947216bf 2476 bfd_byte *loc;
70256ad8
AJ		 2477
2478 /* This symbol has an entry in the procedure linkage table. Set
407443a3 2479 it up. */
c434dee6
AJ		 2480 if (h->dynindx == -1
2481 || htab->splt == NULL
2482 || htab->sgotplt == NULL
2483 || htab->srelplt == NULL)
2484 abort ();
70256ad8
AJ		 2485
2486 /* Get the index in the procedure linkage table which
2487 corresponds to this symbol. This is the index of this symbol
2488 in all the symbols for which we are making plt entries. The
2489 first entry in the procedure linkage table is reserved. */
2490 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2491
2492 /* Get the offset into the .got table of the entry that
407443a3 2493 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
fe4770f4 2494 bytes. The first three are reserved for the dynamic linker. */
70256ad8
AJ		 2495 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
2496
2497 /* Fill in the entry in the procedure linkage table. */
c434dee6 2498 memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry,
70256ad8
AJ		 2499 PLT_ENTRY_SIZE);
2500
2501 /* Insert the relocation positions of the plt section. The magic
2502 numbers at the end of the statements are the positions of the
2503 relocations in the plt section. */
653165cc
AJ		 2504 /* Put offset for jmp *name@GOTPCREL(%rip), since the
2505 instruction uses 6 bytes, subtract this value. */
2506 bfd_put_32 (output_bfd,
c434dee6
AJ		 2507 (htab->sgotplt->output_section->vma
2508 + htab->sgotplt->output_offset
653165cc 2509 + got_offset
c434dee6
AJ		 2510 - htab->splt->output_section->vma
2511 - htab->splt->output_offset
653165cc
AJ		 2512 - h->plt.offset
2513 - 6),
c434dee6 2514 htab->splt->contents + h->plt.offset + 2);
653165cc
AJ		 2515 /* Put relocation index. */
2516 bfd_put_32 (output_bfd, plt_index,
c434dee6 2517 htab->splt->contents + h->plt.offset + 7);
653165cc
AJ		 2518 /* Put offset for jmp .PLT0. */
2519 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
c434dee6 2520 htab->splt->contents + h->plt.offset + 12);
70256ad8 2521
653165cc
AJ		 2522 /* Fill in the entry in the global offset table, initially this
2523 points to the pushq instruction in the PLT which is at offset 6. */
c434dee6
AJ		 2524 bfd_put_64 (output_bfd, (htab->splt->output_section->vma
2525 + htab->splt->output_offset
70256ad8 2526 + h->plt.offset + 6),
c434dee6 2527 htab->sgotplt->contents + got_offset);
70256ad8
AJ		 2528
2529 /* Fill in the entry in the .rela.plt section. */
c434dee6
AJ		 2530 rela.r_offset = (htab->sgotplt->output_section->vma
2531 + htab->sgotplt->output_offset
70256ad8
AJ		 2532 + got_offset);
2533 rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT);
2534 rela.r_addend = 0;
947216bf 2535 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
c434dee6 2536 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
70256ad8
AJ		 2537
2538 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2539 {
2540 /* Mark the symbol as undefined, rather than as defined in
c434dee6
AJ		 2541 the .plt section. Leave the value alone. This is a clue
2542 for the dynamic linker, to make function pointer
2543 comparisons work between an application and shared
2544 library. */
70256ad8
AJ		 2545 sym->st_shndx = SHN_UNDEF;
2546 }
2547 }
2548
bffbf940
JJ		 2549 if (h->got.offset != (bfd_vma) -1
2550 && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_GD
2551 && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
053579d7 2552 {
053579d7 2553 Elf_Internal_Rela rela;
947216bf 2554 bfd_byte *loc;
053579d7
AJ		 2555
2556 /* This symbol has an entry in the global offset table. Set it
bffbf940 2557 up. */
c434dee6
AJ		 2558 if (htab->sgot == NULL || htab->srelgot == NULL)
2559 abort ();
053579d7 2560
c434dee6
AJ		 2561 rela.r_offset = (htab->sgot->output_section->vma
2562 + htab->sgot->output_offset
dc810e39 2563 + (h->got.offset &~ (bfd_vma) 1));
053579d7
AJ		 2564
2565 /* If this is a static link, or it is a -Bsymbolic link and the
2566 symbol is defined locally or was forced to be local because
2567 of a version file, we just want to emit a RELATIVE reloc.
2568 The entry in the global offset table will already have been
2569 initialized in the relocate_section function. */
c434dee6 2570 if (info->shared
27482721 2571 && SYMBOL_REFERENCES_LOCAL (info, h))
053579d7 2572 {
cc78d0af 2573 BFD_ASSERT((h->got.offset & 1) != 0);
053579d7
AJ		 2574 rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
2575 rela.r_addend = (h->root.u.def.value
2576 + h->root.u.def.section->output_section->vma
2577 + h->root.u.def.section->output_offset);
2578 }
2579 else
2580 {
2581 BFD_ASSERT((h->got.offset & 1) == 0);
c434dee6
AJ		 2582 bfd_put_64 (output_bfd, (bfd_vma) 0,
2583 htab->sgot->contents + h->got.offset);
053579d7
AJ		 2584 rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT);
2585 rela.r_addend = 0;
2586 }
2587
947216bf
AM		 2588 loc = htab->srelgot->contents;
2589 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 2590 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
053579d7
AJ		 2591 }
2592
70256ad8
AJ		 2593 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2594 {
70256ad8 2595 Elf_Internal_Rela rela;
947216bf 2596 bfd_byte *loc;
70256ad8
AJ		 2597
2598 /* This symbol needs a copy reloc. Set it up. */
2599
c434dee6
AJ		 2600 if (h->dynindx == -1
2601 || (h->root.type != bfd_link_hash_defined
2602 && h->root.type != bfd_link_hash_defweak)
2603 || htab->srelbss == NULL)
2604 abort ();
70256ad8
AJ		 2605
2606 rela.r_offset = (h->root.u.def.value
2607 + h->root.u.def.section->output_section->vma
2608 + h->root.u.def.section->output_offset);
2609 rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY);
2610 rela.r_addend = 0;
947216bf
AM		 2611 loc = htab->srelbss->contents;
2612 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
c434dee6 2613 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
70256ad8
AJ		 2614 }
2615
2616 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2617 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2618 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2619 sym->st_shndx = SHN_ABS;
2620
b34976b6 2621 return TRUE;
70256ad8
AJ		 2622}
2623
c434dee6
AJ		 2624/* Used to decide how to sort relocs in an optimal manner for the
2625 dynamic linker, before writing them out. */
2626
2627static enum elf_reloc_type_class
27482721 2628elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
c434dee6
AJ		 2629{
2630 switch ((int) ELF64_R_TYPE (rela->r_info))
2631 {
2632 case R_X86_64_RELATIVE:
2633 return reloc_class_relative;
2634 case R_X86_64_JUMP_SLOT:
2635 return reloc_class_plt;
2636 case R_X86_64_COPY:
2637 return reloc_class_copy;
2638 default:
2639 return reloc_class_normal;
2640 }
2641}
2642
70256ad8
AJ		 2643/* Finish up the dynamic sections. */
2644
b34976b6 2645static bfd_boolean
27482721 2646elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
70256ad8 2647{
c434dee6 2648 struct elf64_x86_64_link_hash_table *htab;
70256ad8
AJ		 2649 bfd *dynobj;
2650 asection *sdyn;
70256ad8 2651
c434dee6
AJ		 2652 htab = elf64_x86_64_hash_table (info);
2653 dynobj = htab->elf.dynobj;
70256ad8
AJ		 2654 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2655
c434dee6 2656 if (htab->elf.dynamic_sections_created)
70256ad8 2657 {
70256ad8
AJ		 2658 Elf64_External_Dyn *dyncon, *dynconend;
2659
c434dee6
AJ		 2660 if (sdyn == NULL || htab->sgot == NULL)
2661 abort ();
70256ad8
AJ		 2662
2663 dyncon = (Elf64_External_Dyn *) sdyn->contents;
2664 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2665 for (; dyncon < dynconend; dyncon++)
2666 {
2667 Elf_Internal_Dyn dyn;
70256ad8
AJ		 2668 asection *s;
2669
2670 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
2671
2672 switch (dyn.d_tag)
2673 {
2674 default:
053579d7 2675 continue;
70256ad8
AJ		 2676
2677 case DT_PLTGOT:
c434dee6
AJ		 2678 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
2679 break;
70256ad8
AJ		 2680
2681 case DT_JMPREL:
c434dee6
AJ		 2682 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
2683 break;
70256ad8 2684
c434dee6
AJ		 2685 case DT_PLTRELSZ:
2686 s = htab->srelplt->output_section;
2687 if (s->_cooked_size != 0)
2688 dyn.d_un.d_val = s->_cooked_size;
2689 else
2690 dyn.d_un.d_val = s->_raw_size;
70256ad8
AJ		 2691 break;
2692
2693 case DT_RELASZ:
c434dee6
AJ		 2694 /* The procedure linkage table relocs (DT_JMPREL) should
2695 not be included in the overall relocs (DT_RELA).
2696 Therefore, we override the DT_RELASZ entry here to
2697 make it not include the JMPREL relocs. Since the
2698 linker script arranges for .rela.plt to follow all
2699 other relocation sections, we don't have to worry
2700 about changing the DT_RELA entry. */
2701 if (htab->srelplt != NULL)
70256ad8 2702 {
c434dee6
AJ		 2703 s = htab->srelplt->output_section;
2704 if (s->_cooked_size != 0)
2705 dyn.d_un.d_val -= s->_cooked_size;
2706 else
2707 dyn.d_un.d_val -= s->_raw_size;
70256ad8
AJ		 2708 }
2709 break;
70256ad8 2710 }
c434dee6 2711
70256ad8
AJ		 2712 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2713 }
2714
c434dee6
AJ		 2715 /* Fill in the special first entry in the procedure linkage table. */
2716 if (htab->splt && htab->splt->_raw_size > 0)
70256ad8 2717 {
653165cc 2718 /* Fill in the first entry in the procedure linkage table. */
c434dee6
AJ		 2719 memcpy (htab->splt->contents, elf64_x86_64_plt0_entry,
2720 PLT_ENTRY_SIZE);
653165cc
AJ		 2721 /* Add offset for pushq GOT+8(%rip), since the instruction
2722 uses 6 bytes subtract this value. */
2723 bfd_put_32 (output_bfd,
c434dee6
AJ		 2724 (htab->sgotplt->output_section->vma
2725 + htab->sgotplt->output_offset
653165cc 2726 + 8
c434dee6
AJ		 2727 - htab->splt->output_section->vma
2728 - htab->splt->output_offset
653165cc 2729 - 6),
c434dee6 2730 htab->splt->contents + 2);
653165cc
AJ		 2731 /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to
2732 the end of the instruction. */
2733 bfd_put_32 (output_bfd,
c434dee6
AJ		 2734 (htab->sgotplt->output_section->vma
2735 + htab->sgotplt->output_offset
653165cc 2736 + 16
c434dee6
AJ		 2737 - htab->splt->output_section->vma
2738 - htab->splt->output_offset
653165cc 2739 - 12),
c434dee6 2740 htab->splt->contents + 8);
653165cc 2741
c434dee6
AJ		 2742 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize =
2743 PLT_ENTRY_SIZE;
70256ad8 2744 }
70256ad8
AJ		 2745 }
2746
c434dee6 2747 if (htab->sgotplt)
70256ad8 2748 {
c434dee6
AJ		 2749 /* Fill in the first three entries in the global offset table. */
2750 if (htab->sgotplt->_raw_size > 0)
2751 {
2752 /* Set the first entry in the global offset table to the address of
2753 the dynamic section. */
2754 if (sdyn == NULL)
2755 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents);
2756 else
2757 bfd_put_64 (output_bfd,
2758 sdyn->output_section->vma + sdyn->output_offset,
2759 htab->sgotplt->contents);
2760 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
2761 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE);
2762 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2);
2763 }
70256ad8 2764
c434dee6
AJ		 2765 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize =
2766 GOT_ENTRY_SIZE;
2767 }
70256ad8 2768
b34976b6 2769 return TRUE;
8d88c4ca
NC		 2770}
2771
8df9fc9d 2772
70256ad8
AJ		 2773#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
2774#define TARGET_LITTLE_NAME "elf64-x86-64"
2775#define ELF_ARCH bfd_arch_i386
2776#define ELF_MACHINE_CODE EM_X86_64
2777#define ELF_MAXPAGESIZE 0x100000
2778
2779#define elf_backend_can_gc_sections 1
51b64d56 2780#define elf_backend_can_refcount 1
70256ad8
AJ		 2781#define elf_backend_want_got_plt 1
2782#define elf_backend_plt_readonly 1
2783#define elf_backend_want_plt_sym 0
2784#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
b491616a 2785#define elf_backend_rela_normal 1
70256ad8
AJ		 2786
2787#define elf_info_to_howto elf64_x86_64_info_to_howto
70256ad8 2788
70256ad8
AJ		 2789#define bfd_elf64_bfd_link_hash_table_create \
2790 elf64_x86_64_link_hash_table_create
407443a3 2791#define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup
70256ad8
AJ		 2792
2793#define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol
2794#define elf_backend_check_relocs elf64_x86_64_check_relocs
c434dee6
AJ		 2795#define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol
2796#define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections
2797#define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections
70256ad8
AJ		 2798#define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol
2799#define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook
2800#define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook
3bab7989
ML		 2801#define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus
2802#define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo
c434dee6 2803#define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class
70256ad8
AJ		 2804#define elf_backend_relocate_section elf64_x86_64_relocate_section
2805#define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections
407443a3 2806#define elf_backend_object_p elf64_x86_64_elf_object_p
bffbf940 2807#define bfd_elf64_mkobject elf64_x86_64_mkobject
8d88c4ca
NC		 2808
2809#include "elf64-target.h"
GDB Binutils - Deliverables
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