1 /* X86-64 specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka <jh@suse.cz>.
5 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
27 #include "elf/x86-64.h"
29 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
30 #define MINUS_ONE (~ (bfd_vma) 0)
32 /* The relocation "howto" table. Order of fields:
33 type, size, bitsize, pc_relative, complain_on_overflow,
34 special_function, name, partial_inplace, src_mask, dst_pack, pcrel_offset. */
35 static reloc_howto_type x86_64_elf_howto_table
[] =
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,
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
,
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,
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,
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,
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,
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
,
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
,
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
,
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,
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,
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,
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
,
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
,
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
,
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,
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,
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,
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,
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,
106 /* GNU extension to record C++ vtable hierarchy. */
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
),
110 /* GNU extension to record C++ vtable member usage. */
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,
116 /* Map BFD relocs to the x86_64 elf relocs. */
119 bfd_reloc_code_real_type bfd_reloc_val
;
120 unsigned char elf_reloc_val
;
123 static const struct elf_reloc_map x86_64_reloc_map
[] =
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
, },
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
, },
149 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
150 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
153 static reloc_howto_type
*elf64_x86_64_reloc_type_lookup
154 PARAMS ((bfd
*, bfd_reloc_code_real_type
));
155 static void elf64_x86_64_info_to_howto
156 PARAMS ((bfd
*, arelent
*, Elf_Internal_Rela
*));
157 static bfd_boolean elf64_x86_64_grok_prstatus
158 PARAMS ((bfd
*, Elf_Internal_Note
*));
159 static bfd_boolean elf64_x86_64_grok_psinfo
160 PARAMS ((bfd
*, Elf_Internal_Note
*));
161 static struct bfd_link_hash_table
*elf64_x86_64_link_hash_table_create
163 static int elf64_x86_64_tls_transition
164 PARAMS ((struct bfd_link_info
*, int, int));
165 static bfd_boolean elf64_x86_64_mkobject
167 static bfd_boolean elf64_x86_64_elf_object_p
PARAMS ((bfd
*abfd
));
168 static bfd_boolean create_got_section
169 PARAMS((bfd
*, struct bfd_link_info
*));
170 static bfd_boolean elf64_x86_64_create_dynamic_sections
171 PARAMS((bfd
*, struct bfd_link_info
*));
172 static void elf64_x86_64_copy_indirect_symbol
173 PARAMS ((struct elf_backend_data
*, struct elf_link_hash_entry
*,
174 struct elf_link_hash_entry
*));
175 static bfd_boolean elf64_x86_64_check_relocs
176 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*sec
,
177 const Elf_Internal_Rela
*));
178 static asection
*elf64_x86_64_gc_mark_hook
179 PARAMS ((asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
180 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
182 static bfd_boolean elf64_x86_64_gc_sweep_hook
183 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
184 const Elf_Internal_Rela
*));
186 static struct bfd_hash_entry
*link_hash_newfunc
187 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
188 static bfd_boolean elf64_x86_64_adjust_dynamic_symbol
189 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
191 static bfd_boolean allocate_dynrelocs
192 PARAMS ((struct elf_link_hash_entry
*, PTR
));
193 static bfd_boolean readonly_dynrelocs
194 PARAMS ((struct elf_link_hash_entry
*, PTR
));
195 static bfd_boolean elf64_x86_64_size_dynamic_sections
196 PARAMS ((bfd
*, struct bfd_link_info
*));
197 static bfd_vma dtpoff_base
198 PARAMS ((struct bfd_link_info
*));
200 PARAMS ((struct bfd_link_info
*, bfd_vma
));
201 static bfd_boolean elf64_x86_64_relocate_section
202 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
203 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**));
204 static bfd_boolean elf64_x86_64_finish_dynamic_symbol
205 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*,
206 Elf_Internal_Sym
*sym
));
207 static bfd_boolean elf64_x86_64_finish_dynamic_sections
208 PARAMS ((bfd
*, struct bfd_link_info
*));
209 static enum elf_reloc_type_class elf64_x86_64_reloc_type_class
210 PARAMS ((const Elf_Internal_Rela
*));
212 /* Given a BFD reloc type, return a HOWTO structure. */
213 static reloc_howto_type
*
214 elf64_x86_64_reloc_type_lookup (abfd
, code
)
215 bfd
*abfd ATTRIBUTE_UNUSED
;
216 bfd_reloc_code_real_type code
;
219 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
222 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
223 return &x86_64_elf_howto_table
[i
];
228 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
231 elf64_x86_64_info_to_howto (abfd
, cache_ptr
, dst
)
232 bfd
*abfd ATTRIBUTE_UNUSED
;
234 Elf_Internal_Rela
*dst
;
238 r_type
= ELF64_R_TYPE (dst
->r_info
);
239 if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
)
241 BFD_ASSERT (r_type
<= (unsigned int) R_X86_64_TPOFF32
);
246 BFD_ASSERT (r_type
< (unsigned int) R_X86_64_max
);
247 i
= r_type
- ((unsigned int) R_X86_64_GNU_VTINHERIT
- R_X86_64_TPOFF32
- 1);
249 cache_ptr
->howto
= &x86_64_elf_howto_table
[i
];
250 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
253 /* Support for core dump NOTE sections. */
255 elf64_x86_64_grok_prstatus (abfd
, note
)
257 Elf_Internal_Note
*note
;
262 switch (note
->descsz
)
267 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
269 elf_tdata (abfd
)->core_signal
270 = bfd_get_16 (abfd
, note
->descdata
+ 12);
273 elf_tdata (abfd
)->core_pid
274 = bfd_get_32 (abfd
, note
->descdata
+ 32);
283 /* Make a ".reg/999" section. */
284 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
285 raw_size
, note
->descpos
+ offset
);
289 elf64_x86_64_grok_psinfo (abfd
, note
)
291 Elf_Internal_Note
*note
;
293 switch (note
->descsz
)
298 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
299 elf_tdata (abfd
)->core_program
300 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
301 elf_tdata (abfd
)->core_command
302 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
305 /* Note that for some reason, a spurious space is tacked
306 onto the end of the args in some (at least one anyway)
307 implementations, so strip it off if it exists. */
310 char *command
= elf_tdata (abfd
)->core_command
;
311 int n
= strlen (command
);
313 if (0 < n
&& command
[n
- 1] == ' ')
314 command
[n
- 1] = '\0';
320 /* Functions for the x86-64 ELF linker. */
322 /* The name of the dynamic interpreter. This is put in the .interp
325 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
327 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
328 copying dynamic variables from a shared lib into an app's dynbss
329 section, and instead use a dynamic relocation to point into the
331 #define ELIMINATE_COPY_RELOCS 1
333 /* The size in bytes of an entry in the global offset table. */
335 #define GOT_ENTRY_SIZE 8
337 /* The size in bytes of an entry in the procedure linkage table. */
339 #define PLT_ENTRY_SIZE 16
341 /* The first entry in a procedure linkage table looks like this. See the
342 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
344 static const bfd_byte elf64_x86_64_plt0_entry
[PLT_ENTRY_SIZE
] =
346 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
347 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
348 0x90, 0x90, 0x90, 0x90 /* pad out to 16 bytes with nops. */
351 /* Subsequent entries in a procedure linkage table look like this. */
353 static const bfd_byte elf64_x86_64_plt_entry
[PLT_ENTRY_SIZE
] =
355 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
356 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
357 0x68, /* pushq immediate */
358 0, 0, 0, 0, /* replaced with index into relocation table. */
359 0xe9, /* jmp relative */
360 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
363 /* The x86-64 linker needs to keep track of the number of relocs that
364 it decides to copy as dynamic relocs in check_relocs for each symbol.
365 This is so that it can later discard them if they are found to be
366 unnecessary. We store the information in a field extending the
367 regular ELF linker hash table. */
369 struct elf64_x86_64_dyn_relocs
372 struct elf64_x86_64_dyn_relocs
*next
;
374 /* The input section of the reloc. */
377 /* Total number of relocs copied for the input section. */
380 /* Number of pc-relative relocs copied for the input section. */
381 bfd_size_type pc_count
;
384 /* x86-64 ELF linker hash entry. */
386 struct elf64_x86_64_link_hash_entry
388 struct elf_link_hash_entry elf
;
390 /* Track dynamic relocs copied for this symbol. */
391 struct elf64_x86_64_dyn_relocs
*dyn_relocs
;
393 #define GOT_UNKNOWN 0
397 unsigned char tls_type
;
400 #define elf64_x86_64_hash_entry(ent) \
401 ((struct elf64_x86_64_link_hash_entry *)(ent))
403 struct elf64_x86_64_obj_tdata
405 struct elf_obj_tdata root
;
407 /* tls_type for each local got entry. */
408 char *local_got_tls_type
;
411 #define elf64_x86_64_tdata(abfd) \
412 ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any)
414 #define elf64_x86_64_local_got_tls_type(abfd) \
415 (elf64_x86_64_tdata (abfd)->local_got_tls_type)
418 /* x86-64 ELF linker hash table. */
420 struct elf64_x86_64_link_hash_table
422 struct elf_link_hash_table elf
;
424 /* Short-cuts to get to dynamic linker sections. */
434 bfd_signed_vma refcount
;
438 /* Small local sym to section mapping cache. */
439 struct sym_sec_cache sym_sec
;
442 /* Get the x86-64 ELF linker hash table from a link_info structure. */
444 #define elf64_x86_64_hash_table(p) \
445 ((struct elf64_x86_64_link_hash_table *) ((p)->hash))
447 /* Create an entry in an x86-64 ELF linker hash table. */
449 static struct bfd_hash_entry
*
450 link_hash_newfunc (entry
, table
, string
)
451 struct bfd_hash_entry
*entry
;
452 struct bfd_hash_table
*table
;
455 /* Allocate the structure if it has not already been allocated by a
459 entry
= bfd_hash_allocate (table
,
460 sizeof (struct elf64_x86_64_link_hash_entry
));
465 /* Call the allocation method of the superclass. */
466 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
469 struct elf64_x86_64_link_hash_entry
*eh
;
471 eh
= (struct elf64_x86_64_link_hash_entry
*) entry
;
472 eh
->dyn_relocs
= NULL
;
473 eh
->tls_type
= GOT_UNKNOWN
;
479 /* Create an X86-64 ELF linker hash table. */
481 static struct bfd_link_hash_table
*
482 elf64_x86_64_link_hash_table_create (abfd
)
485 struct elf64_x86_64_link_hash_table
*ret
;
486 bfd_size_type amt
= sizeof (struct elf64_x86_64_link_hash_table
);
488 ret
= (struct elf64_x86_64_link_hash_table
*) bfd_malloc (amt
);
492 if (! _bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
))
505 ret
->sym_sec
.abfd
= NULL
;
506 ret
->tls_ld_got
.refcount
= 0;
508 return &ret
->elf
.root
;
511 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
512 shortcuts to them in our hash table. */
515 create_got_section (dynobj
, info
)
517 struct bfd_link_info
*info
;
519 struct elf64_x86_64_link_hash_table
*htab
;
521 if (! _bfd_elf_create_got_section (dynobj
, info
))
524 htab
= elf64_x86_64_hash_table (info
);
525 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
526 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
527 if (!htab
->sgot
|| !htab
->sgotplt
)
530 htab
->srelgot
= bfd_make_section (dynobj
, ".rela.got");
531 if (htab
->srelgot
== NULL
532 || ! bfd_set_section_flags (dynobj
, htab
->srelgot
,
533 (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
534 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
536 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 3))
541 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
542 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
546 elf64_x86_64_create_dynamic_sections (dynobj
, info
)
548 struct bfd_link_info
*info
;
550 struct elf64_x86_64_link_hash_table
*htab
;
552 htab
= elf64_x86_64_hash_table (info
);
553 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
556 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
559 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
560 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rela.plt");
561 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
563 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rela.bss");
565 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
566 || (!info
->shared
&& !htab
->srelbss
))
572 /* Copy the extra info we tack onto an elf_link_hash_entry. */
575 elf64_x86_64_copy_indirect_symbol (bed
, dir
, ind
)
576 struct elf_backend_data
*bed
;
577 struct elf_link_hash_entry
*dir
, *ind
;
579 struct elf64_x86_64_link_hash_entry
*edir
, *eind
;
581 edir
= (struct elf64_x86_64_link_hash_entry
*) dir
;
582 eind
= (struct elf64_x86_64_link_hash_entry
*) ind
;
584 if (eind
->dyn_relocs
!= NULL
)
586 if (edir
->dyn_relocs
!= NULL
)
588 struct elf64_x86_64_dyn_relocs
**pp
;
589 struct elf64_x86_64_dyn_relocs
*p
;
591 if (ind
->root
.type
== bfd_link_hash_indirect
)
594 /* Add reloc counts against the weak sym to the strong sym
595 list. Merge any entries against the same section. */
596 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
598 struct elf64_x86_64_dyn_relocs
*q
;
600 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
601 if (q
->sec
== p
->sec
)
603 q
->pc_count
+= p
->pc_count
;
604 q
->count
+= p
->count
;
611 *pp
= edir
->dyn_relocs
;
614 edir
->dyn_relocs
= eind
->dyn_relocs
;
615 eind
->dyn_relocs
= NULL
;
618 if (ind
->root
.type
== bfd_link_hash_indirect
619 && dir
->got
.refcount
<= 0)
621 edir
->tls_type
= eind
->tls_type
;
622 eind
->tls_type
= GOT_UNKNOWN
;
625 if (ELIMINATE_COPY_RELOCS
626 && ind
->root
.type
!= bfd_link_hash_indirect
627 && (dir
->elf_link_hash_flags
& ELF_LINK_HASH_DYNAMIC_ADJUSTED
) != 0)
628 /* If called to transfer flags for a weakdef during processing
629 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
630 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
631 dir
->elf_link_hash_flags
|=
632 (ind
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_DYNAMIC
633 | ELF_LINK_HASH_REF_REGULAR
634 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
));
636 _bfd_elf_link_hash_copy_indirect (bed
, dir
, ind
);
640 elf64_x86_64_mkobject (abfd
)
643 bfd_size_type amt
= sizeof (struct elf64_x86_64_obj_tdata
);
644 abfd
->tdata
.any
= bfd_zalloc (abfd
, amt
);
645 if (abfd
->tdata
.any
== NULL
)
651 elf64_x86_64_elf_object_p (abfd
)
654 /* Allocate our special target data. */
655 struct elf64_x86_64_obj_tdata
*new_tdata
;
656 bfd_size_type amt
= sizeof (struct elf64_x86_64_obj_tdata
);
657 new_tdata
= bfd_zalloc (abfd
, amt
);
658 if (new_tdata
== NULL
)
660 new_tdata
->root
= *abfd
->tdata
.elf_obj_data
;
661 abfd
->tdata
.any
= new_tdata
;
662 /* Set the right machine number for an x86-64 elf64 file. */
663 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
668 elf64_x86_64_tls_transition (info
, r_type
, is_local
)
669 struct bfd_link_info
*info
;
679 case R_X86_64_GOTTPOFF
:
681 return R_X86_64_TPOFF32
;
682 return R_X86_64_GOTTPOFF
;
684 return R_X86_64_TPOFF32
;
690 /* Look through the relocs for a section during the first phase, and
691 calculate needed space in the global offset table, procedure
692 linkage table, and dynamic reloc sections. */
695 elf64_x86_64_check_relocs (abfd
, info
, sec
, relocs
)
697 struct bfd_link_info
*info
;
699 const Elf_Internal_Rela
*relocs
;
701 struct elf64_x86_64_link_hash_table
*htab
;
702 Elf_Internal_Shdr
*symtab_hdr
;
703 struct elf_link_hash_entry
**sym_hashes
;
704 const Elf_Internal_Rela
*rel
;
705 const Elf_Internal_Rela
*rel_end
;
708 if (info
->relocateable
)
711 htab
= elf64_x86_64_hash_table (info
);
712 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
713 sym_hashes
= elf_sym_hashes (abfd
);
717 rel_end
= relocs
+ sec
->reloc_count
;
718 for (rel
= relocs
; rel
< rel_end
; rel
++)
721 unsigned long r_symndx
;
722 struct elf_link_hash_entry
*h
;
724 r_symndx
= ELF64_R_SYM (rel
->r_info
);
725 r_type
= ELF64_R_TYPE (rel
->r_info
);
727 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
729 (*_bfd_error_handler
) (_("%s: bad symbol index: %d"),
730 bfd_archive_filename (abfd
),
735 if (r_symndx
< symtab_hdr
->sh_info
)
738 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
740 r_type
= elf64_x86_64_tls_transition (info
, r_type
, h
== NULL
);
744 htab
->tls_ld_got
.refcount
+= 1;
747 case R_X86_64_TPOFF32
:
750 (*_bfd_error_handler
)
751 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
752 bfd_archive_filename (abfd
),
753 x86_64_elf_howto_table
[r_type
].name
);
754 bfd_set_error (bfd_error_bad_value
);
759 case R_X86_64_GOTTPOFF
:
761 info
->flags
|= DF_STATIC_TLS
;
765 case R_X86_64_GOTPCREL
:
767 /* This symbol requires a global offset table entry. */
769 int tls_type
, old_tls_type
;
773 default: tls_type
= GOT_NORMAL
; break;
774 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
775 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
780 h
->got
.refcount
+= 1;
781 old_tls_type
= elf64_x86_64_hash_entry (h
)->tls_type
;
785 bfd_signed_vma
*local_got_refcounts
;
787 /* This is a global offset table entry for a local symbol. */
788 local_got_refcounts
= elf_local_got_refcounts (abfd
);
789 if (local_got_refcounts
== NULL
)
793 size
= symtab_hdr
->sh_info
;
794 size
*= sizeof (bfd_signed_vma
) + sizeof (char);
795 local_got_refcounts
= ((bfd_signed_vma
*)
796 bfd_zalloc (abfd
, size
));
797 if (local_got_refcounts
== NULL
)
799 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
800 elf64_x86_64_local_got_tls_type (abfd
)
801 = (char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
803 local_got_refcounts
[r_symndx
] += 1;
805 = elf64_x86_64_local_got_tls_type (abfd
) [r_symndx
];
808 /* If a TLS symbol is accessed using IE at least once,
809 there is no point to use dynamic model for it. */
810 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
811 && (old_tls_type
!= GOT_TLS_GD
|| tls_type
!= GOT_TLS_IE
))
813 if (old_tls_type
== GOT_TLS_IE
&& tls_type
== GOT_TLS_GD
)
814 tls_type
= old_tls_type
;
817 (*_bfd_error_handler
)
818 (_("%s: %s' accessed both as normal and thread local symbol"),
819 bfd_archive_filename (abfd
),
820 h
? h
->root
.root
.string
: "<local>");
825 if (old_tls_type
!= tls_type
)
828 elf64_x86_64_hash_entry (h
)->tls_type
= tls_type
;
830 elf64_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
835 //case R_X86_64_GOTPCREL:
837 if (htab
->sgot
== NULL
)
839 if (htab
->elf
.dynobj
== NULL
)
840 htab
->elf
.dynobj
= abfd
;
841 if (!create_got_section (htab
->elf
.dynobj
, info
))
847 /* This symbol requires a procedure linkage table entry. We
848 actually build the entry in adjust_dynamic_symbol,
849 because this might be a case of linking PIC code which is
850 never referenced by a dynamic object, in which case we
851 don't need to generate a procedure linkage table entry
854 /* If this is a local symbol, we resolve it directly without
855 creating a procedure linkage table entry. */
859 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
860 h
->plt
.refcount
+= 1;
867 /* Let's help debug shared library creation. These relocs
868 cannot be used in shared libs. Don't error out for
869 sections we don't care about, such as debug sections or
870 non-constant sections. */
872 && (sec
->flags
& SEC_ALLOC
) != 0
873 && (sec
->flags
& SEC_READONLY
) != 0)
875 (*_bfd_error_handler
)
876 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
877 bfd_archive_filename (abfd
),
878 x86_64_elf_howto_table
[r_type
].name
);
879 bfd_set_error (bfd_error_bad_value
);
888 if (h
!= NULL
&& !info
->shared
)
890 /* If this reloc is in a read-only section, we might
891 need a copy reloc. We can't check reliably at this
892 stage whether the section is read-only, as input
893 sections have not yet been mapped to output sections.
894 Tentatively set the flag for now, and correct in
895 adjust_dynamic_symbol. */
896 h
->elf_link_hash_flags
|= ELF_LINK_NON_GOT_REF
;
898 /* We may need a .plt entry if the function this reloc
899 refers to is in a shared lib. */
900 h
->plt
.refcount
+= 1;
903 /* If we are creating a shared library, and this is a reloc
904 against a global symbol, or a non PC relative reloc
905 against a local symbol, then we need to copy the reloc
906 into the shared library. However, if we are linking with
907 -Bsymbolic, we do not need to copy a reloc against a
908 global symbol which is defined in an object we are
909 including in the link (i.e., DEF_REGULAR is set). At
910 this point we have not seen all the input files, so it is
911 possible that DEF_REGULAR is not set now but will be set
912 later (it is never cleared). In case of a weak definition,
913 DEF_REGULAR may be cleared later by a strong definition in
914 a shared library. We account for that possibility below by
915 storing information in the relocs_copied field of the hash
916 table entry. A similar situation occurs when creating
917 shared libraries and symbol visibility changes render the
920 If on the other hand, we are creating an executable, we
921 may need to keep relocations for symbols satisfied by a
922 dynamic library if we manage to avoid copy relocs for the
925 && (sec
->flags
& SEC_ALLOC
) != 0
926 && (((r_type
!= R_X86_64_PC8
)
927 && (r_type
!= R_X86_64_PC16
)
928 && (r_type
!= R_X86_64_PC32
))
931 || h
->root
.type
== bfd_link_hash_defweak
932 || (h
->elf_link_hash_flags
933 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
934 || (ELIMINATE_COPY_RELOCS
936 && (sec
->flags
& SEC_ALLOC
) != 0
938 && (h
->root
.type
== bfd_link_hash_defweak
939 || (h
->elf_link_hash_flags
940 & ELF_LINK_HASH_DEF_REGULAR
) == 0)))
942 struct elf64_x86_64_dyn_relocs
*p
;
943 struct elf64_x86_64_dyn_relocs
**head
;
945 /* We must copy these reloc types into the output file.
946 Create a reloc section in dynobj and make room for
953 name
= (bfd_elf_string_from_elf_section
955 elf_elfheader (abfd
)->e_shstrndx
,
956 elf_section_data (sec
)->rel_hdr
.sh_name
));
960 if (strncmp (name
, ".rela", 5) != 0
961 || strcmp (bfd_get_section_name (abfd
, sec
),
964 (*_bfd_error_handler
)
965 (_("%s: bad relocation section name `%s\'"),
966 bfd_archive_filename (abfd
), name
);
969 if (htab
->elf
.dynobj
== NULL
)
970 htab
->elf
.dynobj
= abfd
;
972 dynobj
= htab
->elf
.dynobj
;
974 sreloc
= bfd_get_section_by_name (dynobj
, name
);
979 sreloc
= bfd_make_section (dynobj
, name
);
980 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
981 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
982 if ((sec
->flags
& SEC_ALLOC
) != 0)
983 flags
|= SEC_ALLOC
| SEC_LOAD
;
985 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
986 || ! bfd_set_section_alignment (dynobj
, sreloc
, 3))
989 elf_section_data (sec
)->sreloc
= sreloc
;
992 /* If this is a global symbol, we count the number of
993 relocations we need for this symbol. */
996 head
= &((struct elf64_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
1000 /* Track dynamic relocs needed for local syms too.
1001 We really need local syms available to do this
1005 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1010 head
= ((struct elf64_x86_64_dyn_relocs
**)
1011 &elf_section_data (s
)->local_dynrel
);
1015 if (p
== NULL
|| p
->sec
!= sec
)
1017 bfd_size_type amt
= sizeof *p
;
1018 p
= ((struct elf64_x86_64_dyn_relocs
*)
1019 bfd_alloc (htab
->elf
.dynobj
, amt
));
1030 if (r_type
== R_X86_64_PC8
1031 || r_type
== R_X86_64_PC16
1032 || r_type
== R_X86_64_PC32
)
1037 /* This relocation describes the C++ object vtable hierarchy.
1038 Reconstruct it for later use during GC. */
1039 case R_X86_64_GNU_VTINHERIT
:
1040 if (!_bfd_elf64_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1044 /* This relocation describes which C++ vtable entries are actually
1045 used. Record for later use during GC. */
1046 case R_X86_64_GNU_VTENTRY
:
1047 if (!_bfd_elf64_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1059 /* Return the section that should be marked against GC for a given
1063 elf64_x86_64_gc_mark_hook (sec
, info
, rel
, h
, sym
)
1065 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1066 Elf_Internal_Rela
*rel
;
1067 struct elf_link_hash_entry
*h
;
1068 Elf_Internal_Sym
*sym
;
1072 switch (ELF64_R_TYPE (rel
->r_info
))
1074 case R_X86_64_GNU_VTINHERIT
:
1075 case R_X86_64_GNU_VTENTRY
:
1079 switch (h
->root
.type
)
1081 case bfd_link_hash_defined
:
1082 case bfd_link_hash_defweak
:
1083 return h
->root
.u
.def
.section
;
1085 case bfd_link_hash_common
:
1086 return h
->root
.u
.c
.p
->section
;
1094 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
1099 /* Update the got entry reference counts for the section being removed. */
1102 elf64_x86_64_gc_sweep_hook (abfd
, info
, sec
, relocs
)
1104 struct bfd_link_info
*info
;
1106 const Elf_Internal_Rela
*relocs
;
1108 Elf_Internal_Shdr
*symtab_hdr
;
1109 struct elf_link_hash_entry
**sym_hashes
;
1110 bfd_signed_vma
*local_got_refcounts
;
1111 const Elf_Internal_Rela
*rel
, *relend
;
1113 elf_section_data (sec
)->local_dynrel
= NULL
;
1115 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1116 sym_hashes
= elf_sym_hashes (abfd
);
1117 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1119 relend
= relocs
+ sec
->reloc_count
;
1120 for (rel
= relocs
; rel
< relend
; rel
++)
1122 unsigned long r_symndx
;
1123 unsigned int r_type
;
1124 struct elf_link_hash_entry
*h
= NULL
;
1126 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1127 if (r_symndx
>= symtab_hdr
->sh_info
)
1129 struct elf64_x86_64_link_hash_entry
*eh
;
1130 struct elf64_x86_64_dyn_relocs
**pp
;
1131 struct elf64_x86_64_dyn_relocs
*p
;
1133 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1134 eh
= (struct elf64_x86_64_link_hash_entry
*) h
;
1136 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1139 /* Everything must go for SEC. */
1145 r_type
= ELF64_R_TYPE (rel
->r_info
);
1146 r_type
= elf64_x86_64_tls_transition (info
, r_type
, h
!= NULL
);
1149 case R_X86_64_TLSLD
:
1150 if (elf64_x86_64_hash_table (info
)->tls_ld_got
.refcount
> 0)
1151 elf64_x86_64_hash_table (info
)->tls_ld_got
.refcount
-= 1;
1154 case R_X86_64_TLSGD
:
1155 case R_X86_64_GOTTPOFF
:
1156 case R_X86_64_GOT32
:
1157 case R_X86_64_GOTPCREL
:
1160 if (h
->got
.refcount
> 0)
1161 h
->got
.refcount
-= 1;
1163 else if (local_got_refcounts
!= NULL
)
1165 if (local_got_refcounts
[r_symndx
] > 0)
1166 local_got_refcounts
[r_symndx
] -= 1;
1182 case R_X86_64_PLT32
:
1185 if (h
->plt
.refcount
> 0)
1186 h
->plt
.refcount
-= 1;
1198 /* Adjust a symbol defined by a dynamic object and referenced by a
1199 regular object. The current definition is in some section of the
1200 dynamic object, but we're not including those sections. We have to
1201 change the definition to something the rest of the link can
1205 elf64_x86_64_adjust_dynamic_symbol (info
, h
)
1206 struct bfd_link_info
*info
;
1207 struct elf_link_hash_entry
*h
;
1209 struct elf64_x86_64_link_hash_table
*htab
;
1211 unsigned int power_of_two
;
1213 /* If this is a function, put it in the procedure linkage table. We
1214 will fill in the contents of the procedure linkage table later,
1215 when we know the address of the .got section. */
1216 if (h
->type
== STT_FUNC
1217 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
1219 if (h
->plt
.refcount
<= 0
1221 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
1222 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) == 0
1223 && h
->root
.type
!= bfd_link_hash_undefweak
1224 && h
->root
.type
!= bfd_link_hash_undefined
))
1226 /* This case can occur if we saw a PLT32 reloc in an input
1227 file, but the symbol was never referred to by a dynamic
1228 object, or if all references were garbage collected. In
1229 such a case, we don't actually need to build a procedure
1230 linkage table, and we can just do a PC32 reloc instead. */
1231 h
->plt
.offset
= (bfd_vma
) -1;
1232 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1238 /* It's possible that we incorrectly decided a .plt reloc was
1239 needed for an R_X86_64_PC32 reloc to a non-function sym in
1240 check_relocs. We can't decide accurately between function and
1241 non-function syms in check-relocs; Objects loaded later in
1242 the link may change h->type. So fix it now. */
1243 h
->plt
.offset
= (bfd_vma
) -1;
1245 /* If this is a weak symbol, and there is a real definition, the
1246 processor independent code will have arranged for us to see the
1247 real definition first, and we can just use the same value. */
1248 if (h
->weakdef
!= NULL
)
1250 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
1251 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
1252 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
1253 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
1254 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1255 h
->elf_link_hash_flags
1256 = ((h
->elf_link_hash_flags
& ~ELF_LINK_NON_GOT_REF
)
1257 | (h
->weakdef
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
));
1261 /* This is a reference to a symbol defined by a dynamic object which
1262 is not a function. */
1264 /* If we are creating a shared library, we must presume that the
1265 only references to the symbol are via the global offset table.
1266 For such cases we need not do anything here; the relocations will
1267 be handled correctly by relocate_section. */
1271 /* If there are no references to this symbol that do not use the
1272 GOT, we don't need to generate a copy reloc. */
1273 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0)
1276 /* If -z nocopyreloc was given, we won't generate them either. */
1277 if (info
->nocopyreloc
)
1279 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_GOT_REF
;
1283 if (ELIMINATE_COPY_RELOCS
)
1285 struct elf64_x86_64_link_hash_entry
* eh
;
1286 struct elf64_x86_64_dyn_relocs
*p
;
1288 eh
= (struct elf64_x86_64_link_hash_entry
*) h
;
1289 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1291 s
= p
->sec
->output_section
;
1292 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1296 /* If we didn't find any dynamic relocs in read-only sections, then
1297 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1300 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_GOT_REF
;
1305 /* We must allocate the symbol in our .dynbss section, which will
1306 become part of the .bss section of the executable. There will be
1307 an entry for this symbol in the .dynsym section. The dynamic
1308 object will contain position independent code, so all references
1309 from the dynamic object to this symbol will go through the global
1310 offset table. The dynamic linker will use the .dynsym entry to
1311 determine the address it must put in the global offset table, so
1312 both the dynamic object and the regular object will refer to the
1313 same memory location for the variable. */
1315 htab
= elf64_x86_64_hash_table (info
);
1317 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
1318 to copy the initial value out of the dynamic object and into the
1319 runtime process image. */
1320 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1322 htab
->srelbss
->_raw_size
+= sizeof (Elf64_External_Rela
);
1323 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
1326 /* We need to figure out the alignment required for this symbol. I
1327 have no idea how ELF linkers handle this. 16-bytes is the size
1328 of the largest type that requires hard alignment -- long double. */
1329 /* FIXME: This is VERY ugly. Should be fixed for all architectures using
1331 power_of_two
= bfd_log2 (h
->size
);
1332 if (power_of_two
> 4)
1335 /* Apply the required alignment. */
1337 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
, (bfd_size_type
) (1 << power_of_two
));
1338 if (power_of_two
> bfd_get_section_alignment (htab
->elf
.dynobj
, s
))
1340 if (! bfd_set_section_alignment (htab
->elf
.dynobj
, s
, power_of_two
))
1344 /* Define the symbol as being at this point in the section. */
1345 h
->root
.u
.def
.section
= s
;
1346 h
->root
.u
.def
.value
= s
->_raw_size
;
1348 /* Increment the section size to make room for the symbol. */
1349 s
->_raw_size
+= h
->size
;
1354 /* This is the condition under which elf64_x86_64_finish_dynamic_symbol
1355 will be called from elflink.h. If elflink.h doesn't call our
1356 finish_dynamic_symbol routine, we'll need to do something about
1357 initializing any .plt and .got entries in elf64_x86_64_relocate_section. */
1358 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1360 && ((INFO)->shared \
1361 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1362 && ((H)->dynindx != -1 \
1363 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1365 /* Allocate space in .plt, .got and associated reloc sections for
1369 allocate_dynrelocs (h
, inf
)
1370 struct elf_link_hash_entry
*h
;
1373 struct bfd_link_info
*info
;
1374 struct elf64_x86_64_link_hash_table
*htab
;
1375 struct elf64_x86_64_link_hash_entry
*eh
;
1376 struct elf64_x86_64_dyn_relocs
*p
;
1378 if (h
->root
.type
== bfd_link_hash_indirect
)
1381 if (h
->root
.type
== bfd_link_hash_warning
)
1382 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1384 info
= (struct bfd_link_info
*) inf
;
1385 htab
= elf64_x86_64_hash_table (info
);
1387 if (htab
->elf
.dynamic_sections_created
1388 && h
->plt
.refcount
> 0)
1390 /* Make sure this symbol is output as a dynamic symbol.
1391 Undefined weak syms won't yet be marked as dynamic. */
1392 if (h
->dynindx
== -1
1393 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
1395 if (! bfd_elf64_link_record_dynamic_symbol (info
, h
))
1399 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info
, h
))
1401 asection
*s
= htab
->splt
;
1403 /* If this is the first .plt entry, make room for the special
1405 if (s
->_raw_size
== 0)
1406 s
->_raw_size
+= PLT_ENTRY_SIZE
;
1408 h
->plt
.offset
= s
->_raw_size
;
1410 /* If this symbol is not defined in a regular file, and we are
1411 not generating a shared library, then set the symbol to this
1412 location in the .plt. This is required to make function
1413 pointers compare as equal between the normal executable and
1414 the shared library. */
1416 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1418 h
->root
.u
.def
.section
= s
;
1419 h
->root
.u
.def
.value
= h
->plt
.offset
;
1422 /* Make room for this entry. */
1423 s
->_raw_size
+= PLT_ENTRY_SIZE
;
1425 /* We also need to make an entry in the .got.plt section, which
1426 will be placed in the .got section by the linker script. */
1427 htab
->sgotplt
->_raw_size
+= GOT_ENTRY_SIZE
;
1429 /* We also need to make an entry in the .rela.plt section. */
1430 htab
->srelplt
->_raw_size
+= sizeof (Elf64_External_Rela
);
1434 h
->plt
.offset
= (bfd_vma
) -1;
1435 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1440 h
->plt
.offset
= (bfd_vma
) -1;
1441 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1444 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
1445 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
1446 if (h
->got
.refcount
> 0
1449 && elf64_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
1450 h
->got
.offset
= (bfd_vma
) -1;
1451 else if (h
->got
.refcount
> 0)
1455 int tls_type
= elf64_x86_64_hash_entry (h
)->tls_type
;
1457 /* Make sure this symbol is output as a dynamic symbol.
1458 Undefined weak syms won't yet be marked as dynamic. */
1459 if (h
->dynindx
== -1
1460 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
1462 if (! bfd_elf64_link_record_dynamic_symbol (info
, h
))
1467 h
->got
.offset
= s
->_raw_size
;
1468 s
->_raw_size
+= GOT_ENTRY_SIZE
;
1469 /* R_X86_64_TLSGD needs 2 consecutive GOT slots. */
1470 if (tls_type
== GOT_TLS_GD
)
1471 s
->_raw_size
+= GOT_ENTRY_SIZE
;
1472 dyn
= htab
->elf
.dynamic_sections_created
;
1473 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
1475 R_X86_64_GOTTPOFF needs one dynamic relocation. */
1476 if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1477 || tls_type
== GOT_TLS_IE
)
1478 htab
->srelgot
->_raw_size
+= sizeof (Elf64_External_Rela
);
1479 else if (tls_type
== GOT_TLS_GD
)
1480 htab
->srelgot
->_raw_size
+= 2 * sizeof (Elf64_External_Rela
);
1481 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
, h
))
1482 htab
->srelgot
->_raw_size
+= sizeof (Elf64_External_Rela
);
1485 h
->got
.offset
= (bfd_vma
) -1;
1487 eh
= (struct elf64_x86_64_link_hash_entry
*) h
;
1488 if (eh
->dyn_relocs
== NULL
)
1491 /* In the shared -Bsymbolic case, discard space allocated for
1492 dynamic pc-relative relocs against symbols which turn out to be
1493 defined in regular objects. For the normal shared case, discard
1494 space for pc-relative relocs that have become local due to symbol
1495 visibility changes. */
1499 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
1500 && ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0
1503 struct elf64_x86_64_dyn_relocs
**pp
;
1505 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1507 p
->count
-= p
->pc_count
;
1516 else if (ELIMINATE_COPY_RELOCS
)
1518 /* For the non-shared case, discard space for relocs against
1519 symbols which turn out to need copy relocs or are not
1522 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
1523 && (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
1524 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1525 || (htab
->elf
.dynamic_sections_created
1526 && (h
->root
.type
== bfd_link_hash_undefweak
1527 || h
->root
.type
== bfd_link_hash_undefined
))))
1529 /* Make sure this symbol is output as a dynamic symbol.
1530 Undefined weak syms won't yet be marked as dynamic. */
1531 if (h
->dynindx
== -1
1532 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
1534 if (! bfd_elf64_link_record_dynamic_symbol (info
, h
))
1538 /* If that succeeded, we know we'll be keeping all the
1540 if (h
->dynindx
!= -1)
1544 eh
->dyn_relocs
= NULL
;
1549 /* Finally, allocate space. */
1550 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1552 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1553 sreloc
->_raw_size
+= p
->count
* sizeof (Elf64_External_Rela
);
1559 /* Find any dynamic relocs that apply to read-only sections. */
1562 readonly_dynrelocs (h
, inf
)
1563 struct elf_link_hash_entry
*h
;
1566 struct elf64_x86_64_link_hash_entry
*eh
;
1567 struct elf64_x86_64_dyn_relocs
*p
;
1569 if (h
->root
.type
== bfd_link_hash_warning
)
1570 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1572 eh
= (struct elf64_x86_64_link_hash_entry
*) h
;
1573 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1575 asection
*s
= p
->sec
->output_section
;
1577 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1579 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
1581 info
->flags
|= DF_TEXTREL
;
1583 /* Not an error, just cut short the traversal. */
1590 /* Set the sizes of the dynamic sections. */
1593 elf64_x86_64_size_dynamic_sections (output_bfd
, info
)
1594 bfd
*output_bfd ATTRIBUTE_UNUSED
;
1595 struct bfd_link_info
*info
;
1597 struct elf64_x86_64_link_hash_table
*htab
;
1603 htab
= elf64_x86_64_hash_table (info
);
1604 dynobj
= htab
->elf
.dynobj
;
1608 if (htab
->elf
.dynamic_sections_created
)
1610 /* Set the contents of the .interp section to the interpreter. */
1613 s
= bfd_get_section_by_name (dynobj
, ".interp");
1616 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1617 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1621 /* Set up .got offsets for local syms, and space for local dynamic
1623 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1625 bfd_signed_vma
*local_got
;
1626 bfd_signed_vma
*end_local_got
;
1627 char *local_tls_type
;
1628 bfd_size_type locsymcount
;
1629 Elf_Internal_Shdr
*symtab_hdr
;
1632 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
1635 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1637 struct elf64_x86_64_dyn_relocs
*p
;
1639 for (p
= *((struct elf64_x86_64_dyn_relocs
**)
1640 &elf_section_data (s
)->local_dynrel
);
1644 if (!bfd_is_abs_section (p
->sec
)
1645 && bfd_is_abs_section (p
->sec
->output_section
))
1647 /* Input section has been discarded, either because
1648 it is a copy of a linkonce section or due to
1649 linker script /DISCARD/, so we'll be discarding
1652 else if (p
->count
!= 0)
1654 srel
= elf_section_data (p
->sec
)->sreloc
;
1655 srel
->_raw_size
+= p
->count
* sizeof (Elf64_External_Rela
);
1656 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1657 info
->flags
|= DF_TEXTREL
;
1663 local_got
= elf_local_got_refcounts (ibfd
);
1667 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
1668 locsymcount
= symtab_hdr
->sh_info
;
1669 end_local_got
= local_got
+ locsymcount
;
1670 local_tls_type
= elf64_x86_64_local_got_tls_type (ibfd
);
1672 srel
= htab
->srelgot
;
1673 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
1677 *local_got
= s
->_raw_size
;
1678 s
->_raw_size
+= GOT_ENTRY_SIZE
;
1679 if (*local_tls_type
== GOT_TLS_GD
)
1680 s
->_raw_size
+= GOT_ENTRY_SIZE
;
1682 || *local_tls_type
== GOT_TLS_GD
1683 || *local_tls_type
== GOT_TLS_IE
)
1684 srel
->_raw_size
+= sizeof (Elf64_External_Rela
);
1687 *local_got
= (bfd_vma
) -1;
1691 if (htab
->tls_ld_got
.refcount
> 0)
1693 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
1695 htab
->tls_ld_got
.offset
= htab
->sgot
->_raw_size
;
1696 htab
->sgot
->_raw_size
+= 2 * GOT_ENTRY_SIZE
;
1697 htab
->srelgot
->_raw_size
+= sizeof (Elf64_External_Rela
);
1700 htab
->tls_ld_got
.offset
= -1;
1702 /* Allocate global sym .plt and .got entries, and space for global
1703 sym dynamic relocs. */
1704 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
1706 /* We now have determined the sizes of the various dynamic sections.
1707 Allocate memory for them. */
1709 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1711 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1716 || s
== htab
->sgotplt
)
1718 /* Strip this section if we don't need it; see the
1721 else if (strncmp (bfd_get_section_name (dynobj
, s
), ".rela", 5) == 0)
1723 if (s
->_raw_size
!= 0 && s
!= htab
->srelplt
)
1726 /* We use the reloc_count field as a counter if we need
1727 to copy relocs into the output file. */
1732 /* It's not one of our sections, so don't allocate space. */
1736 if (s
->_raw_size
== 0)
1738 /* If we don't need this section, strip it from the
1739 output file. This is mostly to handle .rela.bss and
1740 .rela.plt. We must create both sections in
1741 create_dynamic_sections, because they must be created
1742 before the linker maps input sections to output
1743 sections. The linker does that before
1744 adjust_dynamic_symbol is called, and it is that
1745 function which decides whether anything needs to go
1746 into these sections. */
1748 _bfd_strip_section_from_output (info
, s
);
1752 /* Allocate memory for the section contents. We use bfd_zalloc
1753 here in case unused entries are not reclaimed before the
1754 section's contents are written out. This should not happen,
1755 but this way if it does, we get a R_X86_64_NONE reloc instead
1757 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
1758 if (s
->contents
== NULL
)
1762 if (htab
->elf
.dynamic_sections_created
)
1764 /* Add some entries to the .dynamic section. We fill in the
1765 values later, in elf64_x86_64_finish_dynamic_sections, but we
1766 must add the entries now so that we get the correct size for
1767 the .dynamic section. The DT_DEBUG entry is filled in by the
1768 dynamic linker and used by the debugger. */
1769 #define add_dynamic_entry(TAG, VAL) \
1770 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1774 if (!add_dynamic_entry (DT_DEBUG
, 0))
1778 if (htab
->splt
->_raw_size
!= 0)
1780 if (!add_dynamic_entry (DT_PLTGOT
, 0)
1781 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
1782 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
1783 || !add_dynamic_entry (DT_JMPREL
, 0))
1789 if (!add_dynamic_entry (DT_RELA
, 0)
1790 || !add_dynamic_entry (DT_RELASZ
, 0)
1791 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
1794 /* If any dynamic relocs apply to a read-only section,
1795 then we need a DT_TEXTREL entry. */
1796 if ((info
->flags
& DF_TEXTREL
) == 0)
1797 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
1800 if ((info
->flags
& DF_TEXTREL
) != 0)
1802 if (!add_dynamic_entry (DT_TEXTREL
, 0))
1807 #undef add_dynamic_entry
1812 /* Return the base VMA address which should be subtracted from real addresses
1813 when resolving @dtpoff relocation.
1814 This is PT_TLS segment p_vaddr. */
1818 struct bfd_link_info
*info
;
1820 /* If tls_segment is NULL, we should have signalled an error already. */
1821 if (elf_hash_table (info
)->tls_segment
== NULL
)
1823 return elf_hash_table (info
)->tls_segment
->start
;
1826 /* Return the relocation value for @tpoff relocation
1827 if STT_TLS virtual address is ADDRESS. */
1830 tpoff (info
, address
)
1831 struct bfd_link_info
*info
;
1834 struct elf_link_tls_segment
*tls_segment
1835 = elf_hash_table (info
)->tls_segment
;
1837 /* If tls_segment is NULL, we should have signalled an error already. */
1838 if (tls_segment
== NULL
)
1840 return address
- align_power (tls_segment
->size
, tls_segment
->align
)
1841 - tls_segment
->start
;
1844 /* Relocate an x86_64 ELF section. */
1847 elf64_x86_64_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
1848 contents
, relocs
, local_syms
, local_sections
)
1850 struct bfd_link_info
*info
;
1852 asection
*input_section
;
1854 Elf_Internal_Rela
*relocs
;
1855 Elf_Internal_Sym
*local_syms
;
1856 asection
**local_sections
;
1858 struct elf64_x86_64_link_hash_table
*htab
;
1859 Elf_Internal_Shdr
*symtab_hdr
;
1860 struct elf_link_hash_entry
**sym_hashes
;
1861 bfd_vma
*local_got_offsets
;
1862 Elf_Internal_Rela
*rel
;
1863 Elf_Internal_Rela
*relend
;
1865 if (info
->relocateable
)
1868 htab
= elf64_x86_64_hash_table (info
);
1869 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1870 sym_hashes
= elf_sym_hashes (input_bfd
);
1871 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1874 relend
= relocs
+ input_section
->reloc_count
;
1875 for (; rel
< relend
; rel
++)
1877 unsigned int r_type
;
1878 reloc_howto_type
*howto
;
1879 unsigned long r_symndx
;
1880 struct elf_link_hash_entry
*h
;
1881 Elf_Internal_Sym
*sym
;
1885 bfd_boolean unresolved_reloc
;
1886 bfd_reloc_status_type r
;
1889 r_type
= ELF64_R_TYPE (rel
->r_info
);
1890 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
1891 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
1894 if (r_type
>= R_X86_64_max
)
1896 bfd_set_error (bfd_error_bad_value
);
1900 howto
= x86_64_elf_howto_table
+ r_type
;
1901 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1905 unresolved_reloc
= FALSE
;
1906 if (r_symndx
< symtab_hdr
->sh_info
)
1908 sym
= local_syms
+ r_symndx
;
1909 sec
= local_sections
[r_symndx
];
1911 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, sec
, rel
);
1915 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1916 while (h
->root
.type
== bfd_link_hash_indirect
1917 || h
->root
.type
== bfd_link_hash_warning
)
1918 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1920 if (h
->root
.type
== bfd_link_hash_defined
1921 || h
->root
.type
== bfd_link_hash_defweak
)
1923 sec
= h
->root
.u
.def
.section
;
1924 if (sec
->output_section
== NULL
)
1926 /* Set a flag that will be cleared later if we find a
1927 relocation value for this symbol. output_section
1928 is typically NULL for symbols satisfied by a shared
1930 unresolved_reloc
= TRUE
;
1934 relocation
= (h
->root
.u
.def
.value
1935 + sec
->output_section
->vma
1936 + sec
->output_offset
);
1938 else if (h
->root
.type
== bfd_link_hash_undefweak
)
1940 else if (info
->shared
1941 && !info
->no_undefined
1942 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
1946 if (! ((*info
->callbacks
->undefined_symbol
)
1947 (info
, h
->root
.root
.string
, input_bfd
,
1948 input_section
, rel
->r_offset
,
1949 (!info
->shared
|| info
->no_undefined
1950 || ELF_ST_VISIBILITY (h
->other
)))))
1955 /* When generating a shared object, the relocations handled here are
1956 copied into the output file to be resolved at run time. */
1959 case R_X86_64_GOT32
:
1960 /* Relocation is to the entry for this symbol in the global
1962 case R_X86_64_GOTPCREL
:
1963 /* Use global offset table as symbol value. */
1964 if (htab
->sgot
== NULL
)
1971 off
= h
->got
.offset
;
1972 dyn
= htab
->elf
.dynamic_sections_created
;
1974 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
, h
)
1978 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
))
1979 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
1981 /* This is actually a static link, or it is a -Bsymbolic
1982 link and the symbol is defined locally, or the symbol
1983 was forced to be local because of a version file. We
1984 must initialize this entry in the global offset table.
1985 Since the offset must always be a multiple of 8, we
1986 use the least significant bit to record whether we
1987 have initialized it already.
1989 When doing a dynamic link, we create a .rela.got
1990 relocation entry to initialize the value. This is
1991 done in the finish_dynamic_symbol routine. */
1996 bfd_put_64 (output_bfd
, relocation
,
1997 htab
->sgot
->contents
+ off
);
2002 unresolved_reloc
= FALSE
;
2006 if (local_got_offsets
== NULL
)
2009 off
= local_got_offsets
[r_symndx
];
2011 /* The offset must always be a multiple of 8. We use
2012 the least significant bit to record whether we have
2013 already generated the necessary reloc. */
2018 bfd_put_64 (output_bfd
, relocation
,
2019 htab
->sgot
->contents
+ off
);
2024 Elf_Internal_Rela outrel
;
2027 /* We need to generate a R_X86_64_RELATIVE reloc
2028 for the dynamic linker. */
2033 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2034 + htab
->sgot
->output_offset
2036 outrel
.r_info
= ELF64_R_INFO (0, R_X86_64_RELATIVE
);
2037 outrel
.r_addend
= relocation
;
2039 loc
+= s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2040 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2043 local_got_offsets
[r_symndx
] |= 1;
2047 if (off
>= (bfd_vma
) -2)
2050 relocation
= htab
->sgot
->output_offset
+ off
;
2051 if (r_type
== R_X86_64_GOTPCREL
)
2052 relocation
+= htab
->sgot
->output_section
->vma
;
2056 case R_X86_64_PLT32
:
2057 /* Relocation is to the entry for this symbol in the
2058 procedure linkage table. */
2060 /* Resolve a PLT32 reloc against a local symbol directly,
2061 without using the procedure linkage table. */
2065 if (h
->plt
.offset
== (bfd_vma
) -1
2066 || htab
->splt
== NULL
)
2068 /* We didn't make a PLT entry for this symbol. This
2069 happens when statically linking PIC code, or when
2070 using -Bsymbolic. */
2074 relocation
= (htab
->splt
->output_section
->vma
2075 + htab
->splt
->output_offset
2077 unresolved_reloc
= FALSE
;
2087 /* FIXME: The ABI says the linker should make sure the value is
2088 the same when it's zeroextended to 64 bit. */
2090 /* r_symndx will be zero only for relocs against symbols
2091 from removed linkonce sections, or sections discarded by
2094 || (input_section
->flags
& SEC_ALLOC
) == 0)
2098 && ((r_type
!= R_X86_64_PC8
2099 && r_type
!= R_X86_64_PC16
2100 && r_type
!= R_X86_64_PC32
)
2103 && (! info
->symbolic
2104 || (h
->elf_link_hash_flags
2105 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
2106 || (ELIMINATE_COPY_RELOCS
2110 && (h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
2111 && (((h
->elf_link_hash_flags
2112 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2113 && (h
->elf_link_hash_flags
2114 & ELF_LINK_HASH_DEF_REGULAR
) == 0)
2115 || h
->root
.type
== bfd_link_hash_undefweak
2116 || h
->root
.type
== bfd_link_hash_undefined
)))
2118 Elf_Internal_Rela outrel
;
2120 bfd_boolean skip
, relocate
;
2123 /* When generating a shared object, these relocations
2124 are copied into the output file to be resolved at run
2130 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2132 if (outrel
.r_offset
== (bfd_vma
) -1)
2134 else if (outrel
.r_offset
== (bfd_vma
) -2)
2135 skip
= TRUE
, relocate
= TRUE
;
2137 outrel
.r_offset
+= (input_section
->output_section
->vma
2138 + input_section
->output_offset
);
2141 memset (&outrel
, 0, sizeof outrel
);
2143 /* h->dynindx may be -1 if this symbol was marked to
2147 && (r_type
== R_X86_64_PC8
2148 || r_type
== R_X86_64_PC16
2149 || r_type
== R_X86_64_PC32
2152 || (h
->elf_link_hash_flags
2153 & ELF_LINK_HASH_DEF_REGULAR
) == 0))
2155 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2156 outrel
.r_addend
= rel
->r_addend
;
2160 /* This symbol is local, or marked to become local. */
2161 if (r_type
== R_X86_64_64
)
2164 outrel
.r_info
= ELF64_R_INFO (0, R_X86_64_RELATIVE
);
2165 outrel
.r_addend
= relocation
+ rel
->r_addend
;
2172 sec
= local_sections
[r_symndx
];
2175 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
2177 == bfd_link_hash_defweak
));
2178 sec
= h
->root
.u
.def
.section
;
2180 if (sec
!= NULL
&& bfd_is_abs_section (sec
))
2182 else if (sec
== NULL
|| sec
->owner
== NULL
)
2184 bfd_set_error (bfd_error_bad_value
);
2191 osec
= sec
->output_section
;
2192 sindx
= elf_section_data (osec
)->dynindx
;
2193 BFD_ASSERT (sindx
> 0);
2196 outrel
.r_info
= ELF64_R_INFO (sindx
, r_type
);
2197 outrel
.r_addend
= relocation
+ rel
->r_addend
;
2201 sreloc
= elf_section_data (input_section
)->sreloc
;
2205 loc
= sreloc
->contents
;
2206 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2207 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2209 /* If this reloc is against an external symbol, we do
2210 not want to fiddle with the addend. Otherwise, we
2211 need to include the symbol value so that it becomes
2212 an addend for the dynamic reloc. */
2219 case R_X86_64_TLSGD
:
2220 case R_X86_64_GOTTPOFF
:
2221 r_type
= elf64_x86_64_tls_transition (info
, r_type
, h
== NULL
);
2222 tls_type
= GOT_UNKNOWN
;
2223 if (h
== NULL
&& local_got_offsets
)
2224 tls_type
= elf64_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
2227 tls_type
= elf64_x86_64_hash_entry (h
)->tls_type
;
2228 if (!info
->shared
&& h
->dynindx
== -1 && tls_type
== GOT_TLS_IE
)
2229 r_type
= R_X86_64_TPOFF32
;
2231 if (r_type
== R_X86_64_TLSGD
)
2233 if (tls_type
== GOT_TLS_IE
)
2234 r_type
= R_X86_64_GOTTPOFF
;
2237 if (r_type
== R_X86_64_TPOFF32
)
2239 BFD_ASSERT (! unresolved_reloc
);
2240 if (ELF64_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
2243 static unsigned char tlsgd
[8]
2244 = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 };
2246 /* GD->LE transition.
2247 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
2248 .word 0x6666; rex64; call __tls_get_addr@plt
2251 leaq foo@tpoff(%rax), %rax */
2252 BFD_ASSERT (rel
->r_offset
>= 4);
2253 for (i
= 0; i
< 4; i
++)
2254 BFD_ASSERT (bfd_get_8 (input_bfd
,
2255 contents
+ rel
->r_offset
- 4 + i
)
2257 BFD_ASSERT (rel
->r_offset
+ 12 <= input_section
->_raw_size
);
2258 for (i
= 0; i
< 4; i
++)
2259 BFD_ASSERT (bfd_get_8 (input_bfd
,
2260 contents
+ rel
->r_offset
+ 4 + i
)
2262 BFD_ASSERT (rel
+ 1 < relend
);
2263 BFD_ASSERT (ELF64_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
);
2264 memcpy (contents
+ rel
->r_offset
- 4,
2265 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
2267 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2268 contents
+ rel
->r_offset
+ 8);
2269 /* Skip R_X86_64_PLT32. */
2275 unsigned int val
, type
, reg
;
2277 /* IE->LE transition:
2278 Originally it can be one of:
2279 movq foo@gottpoff(%rip), %reg
2280 addq foo@gottpoff(%rip), %reg
2283 leaq foo(%reg), %reg
2285 BFD_ASSERT (rel
->r_offset
>= 3);
2286 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 3);
2287 BFD_ASSERT (val
== 0x48 || val
== 0x4c);
2288 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2289 BFD_ASSERT (type
== 0x8b || type
== 0x03);
2290 reg
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2291 BFD_ASSERT ((reg
& 0xc7) == 5);
2293 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->_raw_size
);
2298 bfd_put_8 (output_bfd
, 0x49,
2299 contents
+ rel
->r_offset
- 3);
2300 bfd_put_8 (output_bfd
, 0xc7,
2301 contents
+ rel
->r_offset
- 2);
2302 bfd_put_8 (output_bfd
, 0xc0 | reg
,
2303 contents
+ rel
->r_offset
- 1);
2307 /* addq -> addq - addressing with %rsp/%r12 is
2310 bfd_put_8 (output_bfd
, 0x49,
2311 contents
+ rel
->r_offset
- 3);
2312 bfd_put_8 (output_bfd
, 0x81,
2313 contents
+ rel
->r_offset
- 2);
2314 bfd_put_8 (output_bfd
, 0xc0 | reg
,
2315 contents
+ rel
->r_offset
- 1);
2321 bfd_put_8 (output_bfd
, 0x4d,
2322 contents
+ rel
->r_offset
- 3);
2323 bfd_put_8 (output_bfd
, 0x8d,
2324 contents
+ rel
->r_offset
- 2);
2325 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
2326 contents
+ rel
->r_offset
- 1);
2328 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2329 contents
+ rel
->r_offset
);
2334 if (htab
->sgot
== NULL
)
2338 off
= h
->got
.offset
;
2341 if (local_got_offsets
== NULL
)
2344 off
= local_got_offsets
[r_symndx
];
2351 Elf_Internal_Rela outrel
;
2355 if (htab
->srelgot
== NULL
)
2358 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2359 + htab
->sgot
->output_offset
+ off
);
2361 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2362 if (r_type
== R_X86_64_TLSGD
)
2363 dr_type
= R_X86_64_DTPMOD64
;
2365 dr_type
= R_X86_64_TPOFF64
;
2367 bfd_put_64 (output_bfd
, 0, htab
->sgot
->contents
+ off
);
2368 outrel
.r_addend
= 0;
2369 if (dr_type
== R_X86_64_TPOFF64
&& indx
== 0)
2370 outrel
.r_addend
= relocation
- dtpoff_base (info
);
2371 outrel
.r_info
= ELF64_R_INFO (indx
, dr_type
);
2373 loc
= htab
->srelgot
->contents
;
2374 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2375 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2377 if (r_type
== R_X86_64_TLSGD
)
2381 BFD_ASSERT (! unresolved_reloc
);
2382 bfd_put_64 (output_bfd
,
2383 relocation
- dtpoff_base (info
),
2384 htab
->sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2388 bfd_put_64 (output_bfd
, 0,
2389 htab
->sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2390 outrel
.r_info
= ELF64_R_INFO (indx
,
2392 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
2393 htab
->srelgot
->reloc_count
++;
2394 loc
+= sizeof (Elf64_External_Rela
);
2395 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2402 local_got_offsets
[r_symndx
] |= 1;
2405 if (off
>= (bfd_vma
) -2)
2407 if (r_type
== ELF64_R_TYPE (rel
->r_info
))
2409 relocation
= htab
->sgot
->output_section
->vma
2410 + htab
->sgot
->output_offset
+ off
;
2411 unresolved_reloc
= FALSE
;
2416 static unsigned char tlsgd
[8]
2417 = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 };
2419 /* GD->IE transition.
2420 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
2421 .word 0x6666; rex64; call __tls_get_addr@plt
2424 addq foo@gottpoff(%rip), %rax */
2425 BFD_ASSERT (rel
->r_offset
>= 4);
2426 for (i
= 0; i
< 4; i
++)
2427 BFD_ASSERT (bfd_get_8 (input_bfd
,
2428 contents
+ rel
->r_offset
- 4 + i
)
2430 BFD_ASSERT (rel
->r_offset
+ 12 <= input_section
->_raw_size
);
2431 for (i
= 0; i
< 4; i
++)
2432 BFD_ASSERT (bfd_get_8 (input_bfd
,
2433 contents
+ rel
->r_offset
+ 4 + i
)
2435 BFD_ASSERT (rel
+ 1 < relend
);
2436 BFD_ASSERT (ELF64_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
);
2437 memcpy (contents
+ rel
->r_offset
- 4,
2438 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
2441 relocation
= (htab
->sgot
->output_section
->vma
2442 + htab
->sgot
->output_offset
+ off
2444 - input_section
->output_section
->vma
2445 - input_section
->output_offset
2447 bfd_put_32 (output_bfd
, relocation
,
2448 contents
+ rel
->r_offset
+ 8);
2449 /* Skip R_X86_64_PLT32. */
2455 case R_X86_64_TLSLD
:
2458 /* LD->LE transition:
2460 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt.
2462 .word 0x6666; .byte 0x66; movl %fs:0, %rax. */
2463 BFD_ASSERT (rel
->r_offset
>= 3);
2464 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 3)
2466 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2)
2468 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1)
2470 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->_raw_size
);
2471 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
2473 BFD_ASSERT (rel
+ 1 < relend
);
2474 BFD_ASSERT (ELF64_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
);
2475 memcpy (contents
+ rel
->r_offset
- 3,
2476 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
2477 /* Skip R_X86_64_PLT32. */
2482 if (htab
->sgot
== NULL
)
2485 off
= htab
->tls_ld_got
.offset
;
2490 Elf_Internal_Rela outrel
;
2493 if (htab
->srelgot
== NULL
)
2496 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2497 + htab
->sgot
->output_offset
+ off
);
2499 bfd_put_64 (output_bfd
, 0,
2500 htab
->sgot
->contents
+ off
);
2501 bfd_put_64 (output_bfd
, 0,
2502 htab
->sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2503 outrel
.r_info
= ELF64_R_INFO (0, R_X86_64_DTPMOD64
);
2504 outrel
.r_addend
= 0;
2505 loc
= htab
->srelgot
->contents
;
2506 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2507 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2508 htab
->tls_ld_got
.offset
|= 1;
2510 relocation
= htab
->sgot
->output_section
->vma
2511 + htab
->sgot
->output_offset
+ off
;
2512 unresolved_reloc
= FALSE
;
2515 case R_X86_64_DTPOFF32
:
2516 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
2517 relocation
-= dtpoff_base (info
);
2519 relocation
= tpoff (info
, relocation
);
2522 case R_X86_64_TPOFF32
:
2523 BFD_ASSERT (! info
->shared
);
2524 relocation
= tpoff (info
, relocation
);
2531 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2532 because such sections are not SEC_ALLOC and thus ld.so will
2533 not process them. */
2534 if (unresolved_reloc
2535 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
2536 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0))
2537 (*_bfd_error_handler
)
2538 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2539 bfd_archive_filename (input_bfd
),
2540 bfd_get_section_name (input_bfd
, input_section
),
2541 (long) rel
->r_offset
,
2542 h
->root
.root
.string
);
2544 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2545 contents
, rel
->r_offset
,
2546 relocation
, rel
->r_addend
);
2548 if (r
!= bfd_reloc_ok
)
2553 name
= h
->root
.root
.string
;
2556 name
= bfd_elf_string_from_elf_section (input_bfd
,
2557 symtab_hdr
->sh_link
,
2562 name
= bfd_section_name (input_bfd
, sec
);
2565 if (r
== bfd_reloc_overflow
)
2568 if (! ((*info
->callbacks
->reloc_overflow
)
2569 (info
, name
, howto
->name
, (bfd_vma
) 0,
2570 input_bfd
, input_section
, rel
->r_offset
)))
2575 (*_bfd_error_handler
)
2576 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2577 bfd_archive_filename (input_bfd
),
2578 bfd_get_section_name (input_bfd
, input_section
),
2579 (long) rel
->r_offset
, name
, (int) r
);
2588 /* Finish up dynamic symbol handling. We set the contents of various
2589 dynamic sections here. */
2592 elf64_x86_64_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
2594 struct bfd_link_info
*info
;
2595 struct elf_link_hash_entry
*h
;
2596 Elf_Internal_Sym
*sym
;
2598 struct elf64_x86_64_link_hash_table
*htab
;
2600 htab
= elf64_x86_64_hash_table (info
);
2602 if (h
->plt
.offset
!= (bfd_vma
) -1)
2606 Elf_Internal_Rela rela
;
2609 /* This symbol has an entry in the procedure linkage table. Set
2611 if (h
->dynindx
== -1
2612 || htab
->splt
== NULL
2613 || htab
->sgotplt
== NULL
2614 || htab
->srelplt
== NULL
)
2617 /* Get the index in the procedure linkage table which
2618 corresponds to this symbol. This is the index of this symbol
2619 in all the symbols for which we are making plt entries. The
2620 first entry in the procedure linkage table is reserved. */
2621 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
2623 /* Get the offset into the .got table of the entry that
2624 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
2625 bytes. The first three are reserved for the dynamic linker. */
2626 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2628 /* Fill in the entry in the procedure linkage table. */
2629 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf64_x86_64_plt_entry
,
2632 /* Insert the relocation positions of the plt section. The magic
2633 numbers at the end of the statements are the positions of the
2634 relocations in the plt section. */
2635 /* Put offset for jmp *name@GOTPCREL(%rip), since the
2636 instruction uses 6 bytes, subtract this value. */
2637 bfd_put_32 (output_bfd
,
2638 (htab
->sgotplt
->output_section
->vma
2639 + htab
->sgotplt
->output_offset
2641 - htab
->splt
->output_section
->vma
2642 - htab
->splt
->output_offset
2645 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
2646 /* Put relocation index. */
2647 bfd_put_32 (output_bfd
, plt_index
,
2648 htab
->splt
->contents
+ h
->plt
.offset
+ 7);
2649 /* Put offset for jmp .PLT0. */
2650 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
2651 htab
->splt
->contents
+ h
->plt
.offset
+ 12);
2653 /* Fill in the entry in the global offset table, initially this
2654 points to the pushq instruction in the PLT which is at offset 6. */
2655 bfd_put_64 (output_bfd
, (htab
->splt
->output_section
->vma
2656 + htab
->splt
->output_offset
2657 + h
->plt
.offset
+ 6),
2658 htab
->sgotplt
->contents
+ got_offset
);
2660 /* Fill in the entry in the .rela.plt section. */
2661 rela
.r_offset
= (htab
->sgotplt
->output_section
->vma
2662 + htab
->sgotplt
->output_offset
2664 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_X86_64_JUMP_SLOT
);
2666 loc
= htab
->srelplt
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
2667 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
2669 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2671 /* Mark the symbol as undefined, rather than as defined in
2672 the .plt section. Leave the value alone. This is a clue
2673 for the dynamic linker, to make function pointer
2674 comparisons work between an application and shared
2676 sym
->st_shndx
= SHN_UNDEF
;
2680 if (h
->got
.offset
!= (bfd_vma
) -1
2681 && elf64_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_GD
2682 && elf64_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
2684 Elf_Internal_Rela rela
;
2687 /* This symbol has an entry in the global offset table. Set it
2689 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
2692 rela
.r_offset
= (htab
->sgot
->output_section
->vma
2693 + htab
->sgot
->output_offset
2694 + (h
->got
.offset
&~ (bfd_vma
) 1));
2696 /* If this is a static link, or it is a -Bsymbolic link and the
2697 symbol is defined locally or was forced to be local because
2698 of a version file, we just want to emit a RELATIVE reloc.
2699 The entry in the global offset table will already have been
2700 initialized in the relocate_section function. */
2704 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
))
2705 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
))
2707 BFD_ASSERT((h
->got
.offset
& 1) != 0);
2708 rela
.r_info
= ELF64_R_INFO (0, R_X86_64_RELATIVE
);
2709 rela
.r_addend
= (h
->root
.u
.def
.value
2710 + h
->root
.u
.def
.section
->output_section
->vma
2711 + h
->root
.u
.def
.section
->output_offset
);
2715 BFD_ASSERT((h
->got
.offset
& 1) == 0);
2716 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
2717 htab
->sgot
->contents
+ h
->got
.offset
);
2718 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_X86_64_GLOB_DAT
);
2722 loc
= htab
->srelgot
->contents
;
2723 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2724 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
2727 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
2729 Elf_Internal_Rela rela
;
2732 /* This symbol needs a copy reloc. Set it up. */
2734 if (h
->dynindx
== -1
2735 || (h
->root
.type
!= bfd_link_hash_defined
2736 && h
->root
.type
!= bfd_link_hash_defweak
)
2737 || htab
->srelbss
== NULL
)
2740 rela
.r_offset
= (h
->root
.u
.def
.value
2741 + h
->root
.u
.def
.section
->output_section
->vma
2742 + h
->root
.u
.def
.section
->output_offset
);
2743 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_X86_64_COPY
);
2745 loc
= htab
->srelbss
->contents
;
2746 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2747 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
2750 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2751 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
2752 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
2753 sym
->st_shndx
= SHN_ABS
;
2758 /* Used to decide how to sort relocs in an optimal manner for the
2759 dynamic linker, before writing them out. */
2761 static enum elf_reloc_type_class
2762 elf64_x86_64_reloc_type_class (rela
)
2763 const Elf_Internal_Rela
*rela
;
2765 switch ((int) ELF64_R_TYPE (rela
->r_info
))
2767 case R_X86_64_RELATIVE
:
2768 return reloc_class_relative
;
2769 case R_X86_64_JUMP_SLOT
:
2770 return reloc_class_plt
;
2772 return reloc_class_copy
;
2774 return reloc_class_normal
;
2778 /* Finish up the dynamic sections. */
2781 elf64_x86_64_finish_dynamic_sections (output_bfd
, info
)
2783 struct bfd_link_info
*info
;
2785 struct elf64_x86_64_link_hash_table
*htab
;
2789 htab
= elf64_x86_64_hash_table (info
);
2790 dynobj
= htab
->elf
.dynobj
;
2791 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
2793 if (htab
->elf
.dynamic_sections_created
)
2795 Elf64_External_Dyn
*dyncon
, *dynconend
;
2797 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
2800 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
2801 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
2802 for (; dyncon
< dynconend
; dyncon
++)
2804 Elf_Internal_Dyn dyn
;
2807 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
2815 dyn
.d_un
.d_ptr
= htab
->sgot
->output_section
->vma
;
2819 dyn
.d_un
.d_ptr
= htab
->srelplt
->output_section
->vma
;
2823 s
= htab
->srelplt
->output_section
;
2824 if (s
->_cooked_size
!= 0)
2825 dyn
.d_un
.d_val
= s
->_cooked_size
;
2827 dyn
.d_un
.d_val
= s
->_raw_size
;
2831 /* The procedure linkage table relocs (DT_JMPREL) should
2832 not be included in the overall relocs (DT_RELA).
2833 Therefore, we override the DT_RELASZ entry here to
2834 make it not include the JMPREL relocs. Since the
2835 linker script arranges for .rela.plt to follow all
2836 other relocation sections, we don't have to worry
2837 about changing the DT_RELA entry. */
2838 if (htab
->srelplt
!= NULL
)
2840 s
= htab
->srelplt
->output_section
;
2841 if (s
->_cooked_size
!= 0)
2842 dyn
.d_un
.d_val
-= s
->_cooked_size
;
2844 dyn
.d_un
.d_val
-= s
->_raw_size
;
2849 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2852 /* Fill in the special first entry in the procedure linkage table. */
2853 if (htab
->splt
&& htab
->splt
->_raw_size
> 0)
2855 /* Fill in the first entry in the procedure linkage table. */
2856 memcpy (htab
->splt
->contents
, elf64_x86_64_plt0_entry
,
2858 /* Add offset for pushq GOT+8(%rip), since the instruction
2859 uses 6 bytes subtract this value. */
2860 bfd_put_32 (output_bfd
,
2861 (htab
->sgotplt
->output_section
->vma
2862 + htab
->sgotplt
->output_offset
2864 - htab
->splt
->output_section
->vma
2865 - htab
->splt
->output_offset
2867 htab
->splt
->contents
+ 2);
2868 /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to
2869 the end of the instruction. */
2870 bfd_put_32 (output_bfd
,
2871 (htab
->sgotplt
->output_section
->vma
2872 + htab
->sgotplt
->output_offset
2874 - htab
->splt
->output_section
->vma
2875 - htab
->splt
->output_offset
2877 htab
->splt
->contents
+ 8);
2879 elf_section_data (htab
->splt
->output_section
)->this_hdr
.sh_entsize
=
2886 /* Fill in the first three entries in the global offset table. */
2887 if (htab
->sgotplt
->_raw_size
> 0)
2889 /* Set the first entry in the global offset table to the address of
2890 the dynamic section. */
2892 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
);
2894 bfd_put_64 (output_bfd
,
2895 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
2896 htab
->sgotplt
->contents
);
2897 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
2898 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
+ GOT_ENTRY_SIZE
);
2899 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
2902 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
=
2910 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
2911 #define TARGET_LITTLE_NAME "elf64-x86-64"
2912 #define ELF_ARCH bfd_arch_i386
2913 #define ELF_MACHINE_CODE EM_X86_64
2914 #define ELF_MAXPAGESIZE 0x100000
2916 #define elf_backend_can_gc_sections 1
2917 #define elf_backend_can_refcount 1
2918 #define elf_backend_want_got_plt 1
2919 #define elf_backend_plt_readonly 1
2920 #define elf_backend_want_plt_sym 0
2921 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
2922 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
2923 #define elf_backend_rela_normal 1
2925 #define elf_info_to_howto elf64_x86_64_info_to_howto
2927 #define bfd_elf64_bfd_link_hash_table_create \
2928 elf64_x86_64_link_hash_table_create
2929 #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup
2931 #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol
2932 #define elf_backend_check_relocs elf64_x86_64_check_relocs
2933 #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol
2934 #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections
2935 #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections
2936 #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol
2937 #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook
2938 #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook
2939 #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus
2940 #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo
2941 #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class
2942 #define elf_backend_relocate_section elf64_x86_64_relocate_section
2943 #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections
2944 #define elf_backend_object_p elf64_x86_64_elf_object_p
2945 #define bfd_elf64_mkobject elf64_x86_64_mkobject
2947 #include "elf64-target.h"