1 /* X86-64 specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
4 Contributed by Jan Hubicka <jh@suse.cz>.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
28 #include "bfd_stdint.h"
30 #include "elf/x86-64.h"
32 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
33 #define MINUS_ONE (~ (bfd_vma) 0)
35 /* The relocation "howto" table. Order of fields:
36 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
37 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
38 static reloc_howto_type x86_64_elf_howto_table
[] =
40 HOWTO(R_X86_64_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
41 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
43 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
44 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
46 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
47 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
49 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
50 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
52 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
53 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
55 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
56 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
58 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
59 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
61 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
64 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
65 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
67 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
68 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
70 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
71 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
73 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
74 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
76 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
77 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
78 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
79 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
80 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
81 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
82 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
83 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
84 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
85 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
87 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
88 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
90 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
91 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
93 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
94 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
96 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
97 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
99 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
100 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
102 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
103 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
105 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
106 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
108 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
109 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
111 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
112 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
113 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
114 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
115 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
116 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
117 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
118 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
120 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
121 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
123 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
124 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
125 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
126 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
127 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
129 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
130 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
134 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
135 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
136 "R_X86_64_GOTPC32_TLSDESC",
137 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
138 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
139 complain_overflow_dont
, bfd_elf_generic_reloc
,
140 "R_X86_64_TLSDESC_CALL",
142 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
143 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
145 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
146 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
147 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
150 /* We have a gap in the reloc numbers here.
151 R_X86_64_standard counts the number up to this point, and
152 R_X86_64_vt_offset is the value to subtract from a reloc type of
153 R_X86_64_GNU_VT* to form an index into this table. */
154 #define R_X86_64_standard (R_X86_64_IRELATIVE + 1)
155 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
157 /* GNU extension to record C++ vtable hierarchy. */
158 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
159 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
161 /* GNU extension to record C++ vtable member usage. */
162 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
163 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
167 #define IS_X86_64_PCREL_TYPE(TYPE) \
168 ( ((TYPE) == R_X86_64_PC8) \
169 || ((TYPE) == R_X86_64_PC16) \
170 || ((TYPE) == R_X86_64_PC32) \
171 || ((TYPE) == R_X86_64_PC64))
173 /* Map BFD relocs to the x86_64 elf relocs. */
176 bfd_reloc_code_real_type bfd_reloc_val
;
177 unsigned char elf_reloc_val
;
180 static const struct elf_reloc_map x86_64_reloc_map
[] =
182 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
183 { BFD_RELOC_64
, R_X86_64_64
, },
184 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
185 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
186 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
187 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
188 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
189 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
190 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
191 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
192 { BFD_RELOC_32
, R_X86_64_32
, },
193 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
194 { BFD_RELOC_16
, R_X86_64_16
, },
195 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
196 { BFD_RELOC_8
, R_X86_64_8
, },
197 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
198 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
199 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
200 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
201 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
202 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
203 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
204 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
205 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
206 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
207 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
208 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
209 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
210 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
211 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
212 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
213 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
214 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
215 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
216 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
217 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
218 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
219 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
222 static reloc_howto_type
*
223 elf64_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
227 if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
228 || r_type
>= (unsigned int) R_X86_64_max
)
230 if (r_type
>= (unsigned int) R_X86_64_standard
)
232 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
234 r_type
= R_X86_64_NONE
;
239 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
240 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
241 return &x86_64_elf_howto_table
[i
];
244 /* Given a BFD reloc type, return a HOWTO structure. */
245 static reloc_howto_type
*
246 elf64_x86_64_reloc_type_lookup (bfd
*abfd
,
247 bfd_reloc_code_real_type code
)
251 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
254 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
255 return elf64_x86_64_rtype_to_howto (abfd
,
256 x86_64_reloc_map
[i
].elf_reloc_val
);
261 static reloc_howto_type
*
262 elf64_x86_64_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
268 i
< (sizeof (x86_64_elf_howto_table
)
269 / sizeof (x86_64_elf_howto_table
[0]));
271 if (x86_64_elf_howto_table
[i
].name
!= NULL
272 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
273 return &x86_64_elf_howto_table
[i
];
278 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
281 elf64_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
282 Elf_Internal_Rela
*dst
)
286 r_type
= ELF64_R_TYPE (dst
->r_info
);
287 cache_ptr
->howto
= elf64_x86_64_rtype_to_howto (abfd
, r_type
);
288 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
291 /* Support for core dump NOTE sections. */
293 elf64_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
298 switch (note
->descsz
)
303 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
305 elf_tdata (abfd
)->core_signal
306 = bfd_get_16 (abfd
, note
->descdata
+ 12);
309 elf_tdata (abfd
)->core_pid
310 = bfd_get_32 (abfd
, note
->descdata
+ 32);
319 /* Make a ".reg/999" section. */
320 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
321 size
, note
->descpos
+ offset
);
325 elf64_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
327 switch (note
->descsz
)
332 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
333 elf_tdata (abfd
)->core_program
334 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
335 elf_tdata (abfd
)->core_command
336 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
339 /* Note that for some reason, a spurious space is tacked
340 onto the end of the args in some (at least one anyway)
341 implementations, so strip it off if it exists. */
344 char *command
= elf_tdata (abfd
)->core_command
;
345 int n
= strlen (command
);
347 if (0 < n
&& command
[n
- 1] == ' ')
348 command
[n
- 1] = '\0';
354 /* Functions for the x86-64 ELF linker. */
356 /* The name of the dynamic interpreter. This is put in the .interp
359 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
361 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
362 copying dynamic variables from a shared lib into an app's dynbss
363 section, and instead use a dynamic relocation to point into the
365 #define ELIMINATE_COPY_RELOCS 1
367 /* The size in bytes of an entry in the global offset table. */
369 #define GOT_ENTRY_SIZE 8
371 /* The size in bytes of an entry in the procedure linkage table. */
373 #define PLT_ENTRY_SIZE 16
375 /* The first entry in a procedure linkage table looks like this. See the
376 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
378 static const bfd_byte elf64_x86_64_plt0_entry
[PLT_ENTRY_SIZE
] =
380 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
381 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
382 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
385 /* Subsequent entries in a procedure linkage table look like this. */
387 static const bfd_byte elf64_x86_64_plt_entry
[PLT_ENTRY_SIZE
] =
389 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
390 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
391 0x68, /* pushq immediate */
392 0, 0, 0, 0, /* replaced with index into relocation table. */
393 0xe9, /* jmp relative */
394 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
397 /* The x86-64 linker needs to keep track of the number of relocs that
398 it decides to copy as dynamic relocs in check_relocs for each symbol.
399 This is so that it can later discard them if they are found to be
400 unnecessary. We store the information in a field extending the
401 regular ELF linker hash table. */
403 struct elf64_x86_64_dyn_relocs
406 struct elf64_x86_64_dyn_relocs
*next
;
408 /* The input section of the reloc. */
411 /* Total number of relocs copied for the input section. */
414 /* Number of pc-relative relocs copied for the input section. */
415 bfd_size_type pc_count
;
418 /* x86-64 ELF linker hash entry. */
420 struct elf64_x86_64_link_hash_entry
422 struct elf_link_hash_entry elf
;
424 /* Track dynamic relocs copied for this symbol. */
425 struct elf64_x86_64_dyn_relocs
*dyn_relocs
;
427 #define GOT_UNKNOWN 0
431 #define GOT_TLS_GDESC 4
432 #define GOT_TLS_GD_BOTH_P(type) \
433 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
434 #define GOT_TLS_GD_P(type) \
435 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
436 #define GOT_TLS_GDESC_P(type) \
437 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
438 #define GOT_TLS_GD_ANY_P(type) \
439 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
440 unsigned char tls_type
;
442 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
443 starting at the end of the jump table. */
447 #define elf64_x86_64_hash_entry(ent) \
448 ((struct elf64_x86_64_link_hash_entry *)(ent))
450 struct elf64_x86_64_obj_tdata
452 struct elf_obj_tdata root
;
454 /* tls_type for each local got entry. */
455 char *local_got_tls_type
;
457 /* GOTPLT entries for TLS descriptors. */
458 bfd_vma
*local_tlsdesc_gotent
;
461 #define elf64_x86_64_tdata(abfd) \
462 ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any)
464 #define elf64_x86_64_local_got_tls_type(abfd) \
465 (elf64_x86_64_tdata (abfd)->local_got_tls_type)
467 #define elf64_x86_64_local_tlsdesc_gotent(abfd) \
468 (elf64_x86_64_tdata (abfd)->local_tlsdesc_gotent)
470 #define is_x86_64_elf(bfd) \
471 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
472 && elf_tdata (bfd) != NULL \
473 && elf_object_id (bfd) == X86_64_ELF_TDATA)
476 elf64_x86_64_mkobject (bfd
*abfd
)
478 return bfd_elf_allocate_object (abfd
, sizeof (struct elf64_x86_64_obj_tdata
),
482 /* x86-64 ELF linker hash table. */
484 struct elf64_x86_64_link_hash_table
486 struct elf_link_hash_table elf
;
488 /* Short-cuts to get to dynamic linker sections. */
500 /* The offset into splt of the PLT entry for the TLS descriptor
501 resolver. Special values are 0, if not necessary (or not found
502 to be necessary yet), and -1 if needed but not determined
505 /* The offset into sgot of the GOT entry used by the PLT entry
510 bfd_signed_vma refcount
;
514 /* The amount of space used by the jump slots in the GOT. */
515 bfd_vma sgotplt_jump_table_size
;
517 /* Small local sym to section mapping cache. */
518 struct sym_sec_cache sym_sec
;
520 /* _TLS_MODULE_BASE_ symbol. */
521 struct bfd_link_hash_entry
*tls_module_base
;
524 /* Get the x86-64 ELF linker hash table from a link_info structure. */
526 #define elf64_x86_64_hash_table(p) \
527 ((struct elf64_x86_64_link_hash_table *) ((p)->hash))
529 #define elf64_x86_64_compute_jump_table_size(htab) \
530 ((htab)->srelplt->reloc_count * GOT_ENTRY_SIZE)
532 /* Create an entry in an x86-64 ELF linker hash table. */
534 static struct bfd_hash_entry
*
535 elf64_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
536 struct bfd_hash_table
*table
,
539 /* Allocate the structure if it has not already been allocated by a
543 entry
= bfd_hash_allocate (table
,
544 sizeof (struct elf64_x86_64_link_hash_entry
));
549 /* Call the allocation method of the superclass. */
550 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
553 struct elf64_x86_64_link_hash_entry
*eh
;
555 eh
= (struct elf64_x86_64_link_hash_entry
*) entry
;
556 eh
->dyn_relocs
= NULL
;
557 eh
->tls_type
= GOT_UNKNOWN
;
558 eh
->tlsdesc_got
= (bfd_vma
) -1;
564 /* Create an X86-64 ELF linker hash table. */
566 static struct bfd_link_hash_table
*
567 elf64_x86_64_link_hash_table_create (bfd
*abfd
)
569 struct elf64_x86_64_link_hash_table
*ret
;
570 bfd_size_type amt
= sizeof (struct elf64_x86_64_link_hash_table
);
572 ret
= (struct elf64_x86_64_link_hash_table
*) bfd_malloc (amt
);
576 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
577 elf64_x86_64_link_hash_newfunc
,
578 sizeof (struct elf64_x86_64_link_hash_entry
)))
594 ret
->sym_sec
.abfd
= NULL
;
595 ret
->tlsdesc_plt
= 0;
596 ret
->tlsdesc_got
= 0;
597 ret
->tls_ld_got
.refcount
= 0;
598 ret
->sgotplt_jump_table_size
= 0;
599 ret
->tls_module_base
= NULL
;
601 return &ret
->elf
.root
;
604 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
605 shortcuts to them in our hash table. */
608 elf64_x86_64_create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
610 struct elf64_x86_64_link_hash_table
*htab
;
612 if (! _bfd_elf_create_got_section (dynobj
, info
))
615 htab
= elf64_x86_64_hash_table (info
);
616 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
617 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
618 if (!htab
->sgot
|| !htab
->sgotplt
)
621 htab
->srelgot
= bfd_make_section_with_flags (dynobj
, ".rela.got",
622 (SEC_ALLOC
| SEC_LOAD
627 if (htab
->srelgot
== NULL
628 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 3))
633 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
634 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
638 elf64_x86_64_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
640 struct elf64_x86_64_link_hash_table
*htab
;
642 htab
= elf64_x86_64_hash_table (info
);
643 if (!htab
->sgot
&& !elf64_x86_64_create_got_section (dynobj
, info
))
646 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
649 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
650 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rela.plt");
651 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
653 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rela.bss");
655 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
656 || (!info
->shared
&& !htab
->srelbss
))
662 /* Copy the extra info we tack onto an elf_link_hash_entry. */
665 elf64_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
666 struct elf_link_hash_entry
*dir
,
667 struct elf_link_hash_entry
*ind
)
669 struct elf64_x86_64_link_hash_entry
*edir
, *eind
;
671 edir
= (struct elf64_x86_64_link_hash_entry
*) dir
;
672 eind
= (struct elf64_x86_64_link_hash_entry
*) ind
;
674 if (eind
->dyn_relocs
!= NULL
)
676 if (edir
->dyn_relocs
!= NULL
)
678 struct elf64_x86_64_dyn_relocs
**pp
;
679 struct elf64_x86_64_dyn_relocs
*p
;
681 /* Add reloc counts against the indirect sym to the direct sym
682 list. Merge any entries against the same section. */
683 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
685 struct elf64_x86_64_dyn_relocs
*q
;
687 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
688 if (q
->sec
== p
->sec
)
690 q
->pc_count
+= p
->pc_count
;
691 q
->count
+= p
->count
;
698 *pp
= edir
->dyn_relocs
;
701 edir
->dyn_relocs
= eind
->dyn_relocs
;
702 eind
->dyn_relocs
= NULL
;
705 if (ind
->root
.type
== bfd_link_hash_indirect
706 && dir
->got
.refcount
<= 0)
708 edir
->tls_type
= eind
->tls_type
;
709 eind
->tls_type
= GOT_UNKNOWN
;
712 if (ELIMINATE_COPY_RELOCS
713 && ind
->root
.type
!= bfd_link_hash_indirect
714 && dir
->dynamic_adjusted
)
716 /* If called to transfer flags for a weakdef during processing
717 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
718 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
719 dir
->ref_dynamic
|= ind
->ref_dynamic
;
720 dir
->ref_regular
|= ind
->ref_regular
;
721 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
722 dir
->needs_plt
|= ind
->needs_plt
;
723 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
726 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
730 elf64_x86_64_elf_object_p (bfd
*abfd
)
732 /* Set the right machine number for an x86-64 elf64 file. */
733 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
751 /* Return TRUE if the TLS access code sequence support transition
755 elf64_x86_64_check_tls_transition (bfd
*abfd
, asection
*sec
,
757 Elf_Internal_Shdr
*symtab_hdr
,
758 struct elf_link_hash_entry
**sym_hashes
,
760 const Elf_Internal_Rela
*rel
,
761 const Elf_Internal_Rela
*relend
)
764 unsigned long r_symndx
;
765 struct elf_link_hash_entry
*h
;
768 /* Get the section contents. */
769 if (contents
== NULL
)
771 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
772 contents
= elf_section_data (sec
)->this_hdr
.contents
;
775 /* FIXME: How to better handle error condition? */
776 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
779 /* Cache the section contents for elf_link_input_bfd. */
780 elf_section_data (sec
)->this_hdr
.contents
= contents
;
784 offset
= rel
->r_offset
;
789 if ((rel
+ 1) >= relend
)
792 if (r_type
== R_X86_64_TLSGD
)
794 /* Check transition from GD access model. Only
795 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
796 .word 0x6666; rex64; call __tls_get_addr
797 can transit to different access model. */
799 static x86_64_opcode32 leaq
= { { 0x66, 0x48, 0x8d, 0x3d } },
800 call
= { { 0x66, 0x66, 0x48, 0xe8 } };
802 || (offset
+ 12) > sec
->size
803 || bfd_get_32 (abfd
, contents
+ offset
- 4) != leaq
.i
804 || bfd_get_32 (abfd
, contents
+ offset
+ 4) != call
.i
)
809 /* Check transition from LD access model. Only
810 leaq foo@tlsld(%rip), %rdi;
812 can transit to different access model. */
814 static x86_64_opcode32 ld
= { { 0x48, 0x8d, 0x3d, 0xe8 } };
817 if (offset
< 3 || (offset
+ 9) > sec
->size
)
820 op
.i
= bfd_get_32 (abfd
, contents
+ offset
- 3);
821 op
.c
[3] = bfd_get_8 (abfd
, contents
+ offset
+ 4);
826 r_symndx
= ELF64_R_SYM (rel
[1].r_info
);
827 if (r_symndx
< symtab_hdr
->sh_info
)
830 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
831 /* Use strncmp to check __tls_get_addr since __tls_get_addr
834 && h
->root
.root
.string
!= NULL
835 && (ELF64_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
836 || ELF64_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
)
837 && (strncmp (h
->root
.root
.string
,
838 "__tls_get_addr", 14) == 0));
840 case R_X86_64_GOTTPOFF
:
841 /* Check transition from IE access model:
842 movq foo@gottpoff(%rip), %reg
843 addq foo@gottpoff(%rip), %reg
846 if (offset
< 3 || (offset
+ 4) > sec
->size
)
849 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
850 if (val
!= 0x48 && val
!= 0x4c)
853 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
854 if (val
!= 0x8b && val
!= 0x03)
857 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
858 return (val
& 0xc7) == 5;
860 case R_X86_64_GOTPC32_TLSDESC
:
861 /* Check transition from GDesc access model:
862 leaq x@tlsdesc(%rip), %rax
864 Make sure it's a leaq adding rip to a 32-bit offset
865 into any register, although it's probably almost always
868 if (offset
< 3 || (offset
+ 4) > sec
->size
)
871 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
872 if ((val
& 0xfb) != 0x48)
875 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
878 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
879 return (val
& 0xc7) == 0x05;
881 case R_X86_64_TLSDESC_CALL
:
882 /* Check transition from GDesc access model:
883 call *x@tlsdesc(%rax)
885 if (offset
+ 2 <= sec
->size
)
887 /* Make sure that it's a call *x@tlsdesc(%rax). */
888 static x86_64_opcode16 call
= { { 0xff, 0x10 } };
889 return bfd_get_16 (abfd
, contents
+ offset
) == call
.i
;
899 /* Return TRUE if the TLS access transition is OK or no transition
900 will be performed. Update R_TYPE if there is a transition. */
903 elf64_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
904 asection
*sec
, bfd_byte
*contents
,
905 Elf_Internal_Shdr
*symtab_hdr
,
906 struct elf_link_hash_entry
**sym_hashes
,
907 unsigned int *r_type
, int tls_type
,
908 const Elf_Internal_Rela
*rel
,
909 const Elf_Internal_Rela
*relend
,
910 struct elf_link_hash_entry
*h
)
912 unsigned int from_type
= *r_type
;
913 unsigned int to_type
= from_type
;
914 bfd_boolean check
= TRUE
;
919 case R_X86_64_GOTPC32_TLSDESC
:
920 case R_X86_64_TLSDESC_CALL
:
921 case R_X86_64_GOTTPOFF
:
925 to_type
= R_X86_64_TPOFF32
;
927 to_type
= R_X86_64_GOTTPOFF
;
930 /* When we are called from elf64_x86_64_relocate_section,
931 CONTENTS isn't NULL and there may be additional transitions
932 based on TLS_TYPE. */
933 if (contents
!= NULL
)
935 unsigned int new_to_type
= to_type
;
940 && tls_type
== GOT_TLS_IE
)
941 new_to_type
= R_X86_64_TPOFF32
;
943 if (to_type
== R_X86_64_TLSGD
944 || to_type
== R_X86_64_GOTPC32_TLSDESC
945 || to_type
== R_X86_64_TLSDESC_CALL
)
947 if (tls_type
== GOT_TLS_IE
)
948 new_to_type
= R_X86_64_GOTTPOFF
;
951 /* We checked the transition before when we were called from
952 elf64_x86_64_check_relocs. We only want to check the new
953 transition which hasn't been checked before. */
954 check
= new_to_type
!= to_type
&& from_type
== to_type
;
955 to_type
= new_to_type
;
962 to_type
= R_X86_64_TPOFF32
;
969 /* Return TRUE if there is no transition. */
970 if (from_type
== to_type
)
973 /* Check if the transition can be performed. */
975 && ! elf64_x86_64_check_tls_transition (abfd
, sec
, contents
,
976 symtab_hdr
, sym_hashes
,
977 from_type
, rel
, relend
))
979 reloc_howto_type
*from
, *to
;
981 from
= elf64_x86_64_rtype_to_howto (abfd
, from_type
);
982 to
= elf64_x86_64_rtype_to_howto (abfd
, to_type
);
984 (*_bfd_error_handler
)
985 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
986 "in section `%A' failed"),
987 abfd
, sec
, from
->name
, to
->name
,
988 h
? h
->root
.root
.string
: "a local symbol",
989 (unsigned long) rel
->r_offset
);
990 bfd_set_error (bfd_error_bad_value
);
998 /* Look through the relocs for a section during the first phase, and
999 calculate needed space in the global offset table, procedure
1000 linkage table, and dynamic reloc sections. */
1003 elf64_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1005 const Elf_Internal_Rela
*relocs
)
1007 struct elf64_x86_64_link_hash_table
*htab
;
1008 Elf_Internal_Shdr
*symtab_hdr
;
1009 struct elf_link_hash_entry
**sym_hashes
;
1010 const Elf_Internal_Rela
*rel
;
1011 const Elf_Internal_Rela
*rel_end
;
1014 if (info
->relocatable
)
1017 BFD_ASSERT (is_x86_64_elf (abfd
));
1019 htab
= elf64_x86_64_hash_table (info
);
1020 symtab_hdr
= &elf_symtab_hdr (abfd
);
1021 sym_hashes
= elf_sym_hashes (abfd
);
1025 rel_end
= relocs
+ sec
->reloc_count
;
1026 for (rel
= relocs
; rel
< rel_end
; rel
++)
1028 unsigned int r_type
;
1029 unsigned long r_symndx
;
1030 struct elf_link_hash_entry
*h
;
1032 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1033 r_type
= ELF64_R_TYPE (rel
->r_info
);
1035 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1037 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1042 if (r_symndx
< symtab_hdr
->sh_info
)
1046 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1047 while (h
->root
.type
== bfd_link_hash_indirect
1048 || h
->root
.type
== bfd_link_hash_warning
)
1049 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1051 /* Create the ifunc sections for static executables. If we
1052 never see an indirect function symbol nor we are building
1053 a static executable, those sections will be empty and
1054 won't appear in output. */
1065 case R_X86_64_PLT32
:
1066 case R_X86_64_GOTPCREL
:
1067 case R_X86_64_GOTPCREL64
:
1068 if (!info
->shared
&& htab
->iplt
== NULL
)
1070 if (!_bfd_elf_create_static_ifunc_sections (abfd
,
1074 htab
->iplt
= bfd_get_section_by_name (abfd
, ".iplt");
1075 htab
->irelplt
= bfd_get_section_by_name (abfd
,
1077 htab
->igotplt
= bfd_get_section_by_name (abfd
,
1087 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1088 it here if it is defined in a non-shared object. */
1089 if (h
->type
== STT_GNU_IFUNC
1092 /* It is referenced by a non-shared object. */
1095 /* STT_GNU_IFUNC symbol must go through PLT. */
1096 h
->plt
.refcount
+= 1;
1098 /* STT_GNU_IFUNC needs dynamic sections. */
1099 if (htab
->elf
.dynobj
== NULL
)
1100 htab
->elf
.dynobj
= abfd
;
1105 (*_bfd_error_handler
)
1106 (_("%B: relocation %s against STT_GNU_IFUNC "
1107 "symbol `%s' isn't handled by %s"), abfd
,
1108 x86_64_elf_howto_table
[r_type
].name
,
1109 h
->root
.root
.string
, __FUNCTION__
);
1110 bfd_set_error (bfd_error_bad_value
);
1115 h
->pointer_equality_needed
= 1;
1118 struct elf64_x86_64_dyn_relocs
*p
;
1119 struct elf64_x86_64_dyn_relocs
**head
;
1121 /* We must copy these reloc types into the output
1122 file. Create a reloc section in dynobj and
1123 make room for this reloc. */
1126 if (htab
->elf
.dynobj
== NULL
)
1127 htab
->elf
.dynobj
= abfd
;
1129 sreloc
= _bfd_elf_make_dynamic_reloc_section
1130 (sec
, htab
->elf
.dynobj
, 3, abfd
, TRUE
);
1136 head
= &((struct elf64_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
1138 if (p
== NULL
|| p
->sec
!= sec
)
1140 bfd_size_type amt
= sizeof *p
;
1142 p
= ((struct elf64_x86_64_dyn_relocs
*)
1143 bfd_alloc (htab
->elf
.dynobj
, amt
));
1161 if (r_type
!= R_X86_64_PC32
1162 && r_type
!= R_X86_64_PC64
)
1163 h
->pointer_equality_needed
= 1;
1166 case R_X86_64_PLT32
:
1169 case R_X86_64_GOTPCREL
:
1170 case R_X86_64_GOTPCREL64
:
1171 h
->got
.refcount
+= 1;
1172 if (htab
->sgot
== NULL
1173 && !elf64_x86_64_create_got_section (htab
->elf
.dynobj
,
1183 if (! elf64_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1184 symtab_hdr
, sym_hashes
,
1185 &r_type
, GOT_UNKNOWN
,
1191 case R_X86_64_TLSLD
:
1192 htab
->tls_ld_got
.refcount
+= 1;
1195 case R_X86_64_TPOFF32
:
1198 (*_bfd_error_handler
)
1199 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1201 x86_64_elf_howto_table
[r_type
].name
,
1202 (h
) ? h
->root
.root
.string
: "a local symbol");
1203 bfd_set_error (bfd_error_bad_value
);
1208 case R_X86_64_GOTTPOFF
:
1210 info
->flags
|= DF_STATIC_TLS
;
1213 case R_X86_64_GOT32
:
1214 case R_X86_64_GOTPCREL
:
1215 case R_X86_64_TLSGD
:
1216 case R_X86_64_GOT64
:
1217 case R_X86_64_GOTPCREL64
:
1218 case R_X86_64_GOTPLT64
:
1219 case R_X86_64_GOTPC32_TLSDESC
:
1220 case R_X86_64_TLSDESC_CALL
:
1221 /* This symbol requires a global offset table entry. */
1223 int tls_type
, old_tls_type
;
1227 default: tls_type
= GOT_NORMAL
; break;
1228 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1229 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1230 case R_X86_64_GOTPC32_TLSDESC
:
1231 case R_X86_64_TLSDESC_CALL
:
1232 tls_type
= GOT_TLS_GDESC
; break;
1237 if (r_type
== R_X86_64_GOTPLT64
)
1239 /* This relocation indicates that we also need
1240 a PLT entry, as this is a function. We don't need
1241 a PLT entry for local symbols. */
1243 h
->plt
.refcount
+= 1;
1245 h
->got
.refcount
+= 1;
1246 old_tls_type
= elf64_x86_64_hash_entry (h
)->tls_type
;
1250 bfd_signed_vma
*local_got_refcounts
;
1252 /* This is a global offset table entry for a local symbol. */
1253 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1254 if (local_got_refcounts
== NULL
)
1258 size
= symtab_hdr
->sh_info
;
1259 size
*= sizeof (bfd_signed_vma
)
1260 + sizeof (bfd_vma
) + sizeof (char);
1261 local_got_refcounts
= ((bfd_signed_vma
*)
1262 bfd_zalloc (abfd
, size
));
1263 if (local_got_refcounts
== NULL
)
1265 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1266 elf64_x86_64_local_tlsdesc_gotent (abfd
)
1267 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1268 elf64_x86_64_local_got_tls_type (abfd
)
1269 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1271 local_got_refcounts
[r_symndx
] += 1;
1273 = elf64_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1276 /* If a TLS symbol is accessed using IE at least once,
1277 there is no point to use dynamic model for it. */
1278 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1279 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1280 || tls_type
!= GOT_TLS_IE
))
1282 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1283 tls_type
= old_tls_type
;
1284 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1285 && GOT_TLS_GD_ANY_P (tls_type
))
1286 tls_type
|= old_tls_type
;
1289 (*_bfd_error_handler
)
1290 (_("%B: '%s' accessed both as normal and thread local symbol"),
1291 abfd
, h
? h
->root
.root
.string
: "<local>");
1296 if (old_tls_type
!= tls_type
)
1299 elf64_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1301 elf64_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1306 case R_X86_64_GOTOFF64
:
1307 case R_X86_64_GOTPC32
:
1308 case R_X86_64_GOTPC64
:
1310 if (htab
->sgot
== NULL
)
1312 if (htab
->elf
.dynobj
== NULL
)
1313 htab
->elf
.dynobj
= abfd
;
1314 if (!elf64_x86_64_create_got_section (htab
->elf
.dynobj
,
1320 case R_X86_64_PLT32
:
1321 /* This symbol requires a procedure linkage table entry. We
1322 actually build the entry in adjust_dynamic_symbol,
1323 because this might be a case of linking PIC code which is
1324 never referenced by a dynamic object, in which case we
1325 don't need to generate a procedure linkage table entry
1328 /* If this is a local symbol, we resolve it directly without
1329 creating a procedure linkage table entry. */
1334 h
->plt
.refcount
+= 1;
1337 case R_X86_64_PLTOFF64
:
1338 /* This tries to form the 'address' of a function relative
1339 to GOT. For global symbols we need a PLT entry. */
1343 h
->plt
.refcount
+= 1;
1351 /* Let's help debug shared library creation. These relocs
1352 cannot be used in shared libs. Don't error out for
1353 sections we don't care about, such as debug sections or
1354 non-constant sections. */
1356 && (sec
->flags
& SEC_ALLOC
) != 0
1357 && (sec
->flags
& SEC_READONLY
) != 0)
1359 (*_bfd_error_handler
)
1360 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1362 x86_64_elf_howto_table
[r_type
].name
,
1363 (h
) ? h
->root
.root
.string
: "a local symbol");
1364 bfd_set_error (bfd_error_bad_value
);
1374 if (h
!= NULL
&& info
->executable
)
1376 /* If this reloc is in a read-only section, we might
1377 need a copy reloc. We can't check reliably at this
1378 stage whether the section is read-only, as input
1379 sections have not yet been mapped to output sections.
1380 Tentatively set the flag for now, and correct in
1381 adjust_dynamic_symbol. */
1384 /* We may need a .plt entry if the function this reloc
1385 refers to is in a shared lib. */
1386 h
->plt
.refcount
+= 1;
1387 if (r_type
!= R_X86_64_PC32
&& r_type
!= R_X86_64_PC64
)
1388 h
->pointer_equality_needed
= 1;
1391 /* If we are creating a shared library, and this is a reloc
1392 against a global symbol, or a non PC relative reloc
1393 against a local symbol, then we need to copy the reloc
1394 into the shared library. However, if we are linking with
1395 -Bsymbolic, we do not need to copy a reloc against a
1396 global symbol which is defined in an object we are
1397 including in the link (i.e., DEF_REGULAR is set). At
1398 this point we have not seen all the input files, so it is
1399 possible that DEF_REGULAR is not set now but will be set
1400 later (it is never cleared). In case of a weak definition,
1401 DEF_REGULAR may be cleared later by a strong definition in
1402 a shared library. We account for that possibility below by
1403 storing information in the relocs_copied field of the hash
1404 table entry. A similar situation occurs when creating
1405 shared libraries and symbol visibility changes render the
1408 If on the other hand, we are creating an executable, we
1409 may need to keep relocations for symbols satisfied by a
1410 dynamic library if we manage to avoid copy relocs for the
1413 && (sec
->flags
& SEC_ALLOC
) != 0
1414 && (! IS_X86_64_PCREL_TYPE (r_type
)
1416 && (! SYMBOLIC_BIND (info
, h
)
1417 || h
->root
.type
== bfd_link_hash_defweak
1418 || !h
->def_regular
))))
1419 || (ELIMINATE_COPY_RELOCS
1421 && (sec
->flags
& SEC_ALLOC
) != 0
1423 && (h
->root
.type
== bfd_link_hash_defweak
1424 || !h
->def_regular
)))
1426 struct elf64_x86_64_dyn_relocs
*p
;
1427 struct elf64_x86_64_dyn_relocs
**head
;
1429 /* We must copy these reloc types into the output file.
1430 Create a reloc section in dynobj and make room for
1434 if (htab
->elf
.dynobj
== NULL
)
1435 htab
->elf
.dynobj
= abfd
;
1437 sreloc
= _bfd_elf_make_dynamic_reloc_section
1438 (sec
, htab
->elf
.dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1444 /* If this is a global symbol, we count the number of
1445 relocations we need for this symbol. */
1448 head
= &((struct elf64_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
1453 /* Track dynamic relocs needed for local syms too.
1454 We really need local syms available to do this
1458 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1463 /* Beware of type punned pointers vs strict aliasing
1465 vpp
= &(elf_section_data (s
)->local_dynrel
);
1466 head
= (struct elf64_x86_64_dyn_relocs
**)vpp
;
1470 if (p
== NULL
|| p
->sec
!= sec
)
1472 bfd_size_type amt
= sizeof *p
;
1474 p
= ((struct elf64_x86_64_dyn_relocs
*)
1475 bfd_alloc (htab
->elf
.dynobj
, amt
));
1486 if (IS_X86_64_PCREL_TYPE (r_type
))
1491 /* This relocation describes the C++ object vtable hierarchy.
1492 Reconstruct it for later use during GC. */
1493 case R_X86_64_GNU_VTINHERIT
:
1494 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1498 /* This relocation describes which C++ vtable entries are actually
1499 used. Record for later use during GC. */
1500 case R_X86_64_GNU_VTENTRY
:
1501 BFD_ASSERT (h
!= NULL
);
1503 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1515 /* Return the section that should be marked against GC for a given
1519 elf64_x86_64_gc_mark_hook (asection
*sec
,
1520 struct bfd_link_info
*info
,
1521 Elf_Internal_Rela
*rel
,
1522 struct elf_link_hash_entry
*h
,
1523 Elf_Internal_Sym
*sym
)
1526 switch (ELF64_R_TYPE (rel
->r_info
))
1528 case R_X86_64_GNU_VTINHERIT
:
1529 case R_X86_64_GNU_VTENTRY
:
1533 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1536 /* Update the got entry reference counts for the section being removed. */
1539 elf64_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
1541 const Elf_Internal_Rela
*relocs
)
1543 Elf_Internal_Shdr
*symtab_hdr
;
1544 struct elf_link_hash_entry
**sym_hashes
;
1545 bfd_signed_vma
*local_got_refcounts
;
1546 const Elf_Internal_Rela
*rel
, *relend
;
1548 if (info
->relocatable
)
1551 elf_section_data (sec
)->local_dynrel
= NULL
;
1553 symtab_hdr
= &elf_symtab_hdr (abfd
);
1554 sym_hashes
= elf_sym_hashes (abfd
);
1555 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1557 relend
= relocs
+ sec
->reloc_count
;
1558 for (rel
= relocs
; rel
< relend
; rel
++)
1560 unsigned long r_symndx
;
1561 unsigned int r_type
;
1562 struct elf_link_hash_entry
*h
= NULL
;
1564 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1565 if (r_symndx
>= symtab_hdr
->sh_info
)
1567 struct elf64_x86_64_link_hash_entry
*eh
;
1568 struct elf64_x86_64_dyn_relocs
**pp
;
1569 struct elf64_x86_64_dyn_relocs
*p
;
1571 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1572 while (h
->root
.type
== bfd_link_hash_indirect
1573 || h
->root
.type
== bfd_link_hash_warning
)
1574 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1575 eh
= (struct elf64_x86_64_link_hash_entry
*) h
;
1577 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1580 /* Everything must go for SEC. */
1586 r_type
= ELF64_R_TYPE (rel
->r_info
);
1587 if (! elf64_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1588 symtab_hdr
, sym_hashes
,
1589 &r_type
, GOT_UNKNOWN
,
1595 case R_X86_64_TLSLD
:
1596 if (elf64_x86_64_hash_table (info
)->tls_ld_got
.refcount
> 0)
1597 elf64_x86_64_hash_table (info
)->tls_ld_got
.refcount
-= 1;
1600 case R_X86_64_TLSGD
:
1601 case R_X86_64_GOTPC32_TLSDESC
:
1602 case R_X86_64_TLSDESC_CALL
:
1603 case R_X86_64_GOTTPOFF
:
1604 case R_X86_64_GOT32
:
1605 case R_X86_64_GOTPCREL
:
1606 case R_X86_64_GOT64
:
1607 case R_X86_64_GOTPCREL64
:
1608 case R_X86_64_GOTPLT64
:
1611 if (r_type
== R_X86_64_GOTPLT64
&& h
->plt
.refcount
> 0)
1612 h
->plt
.refcount
-= 1;
1613 if (h
->got
.refcount
> 0)
1614 h
->got
.refcount
-= 1;
1616 else if (local_got_refcounts
!= NULL
)
1618 if (local_got_refcounts
[r_symndx
] > 0)
1619 local_got_refcounts
[r_symndx
] -= 1;
1636 case R_X86_64_PLT32
:
1637 case R_X86_64_PLTOFF64
:
1640 if (h
->plt
.refcount
> 0)
1641 h
->plt
.refcount
-= 1;
1653 /* Adjust a symbol defined by a dynamic object and referenced by a
1654 regular object. The current definition is in some section of the
1655 dynamic object, but we're not including those sections. We have to
1656 change the definition to something the rest of the link can
1660 elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1661 struct elf_link_hash_entry
*h
)
1663 struct elf64_x86_64_link_hash_table
*htab
;
1666 /* STT_GNU_IFUNC symbol must go through PLT. */
1667 if (h
->type
== STT_GNU_IFUNC
)
1669 if (h
->plt
.refcount
<= 0)
1671 h
->plt
.offset
= (bfd_vma
) -1;
1677 /* If this is a function, put it in the procedure linkage table. We
1678 will fill in the contents of the procedure linkage table later,
1679 when we know the address of the .got section. */
1680 if (h
->type
== STT_FUNC
1683 if (h
->plt
.refcount
<= 0
1684 || SYMBOL_CALLS_LOCAL (info
, h
)
1685 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1686 && h
->root
.type
== bfd_link_hash_undefweak
))
1688 /* This case can occur if we saw a PLT32 reloc in an input
1689 file, but the symbol was never referred to by a dynamic
1690 object, or if all references were garbage collected. In
1691 such a case, we don't actually need to build a procedure
1692 linkage table, and we can just do a PC32 reloc instead. */
1693 h
->plt
.offset
= (bfd_vma
) -1;
1700 /* It's possible that we incorrectly decided a .plt reloc was
1701 needed for an R_X86_64_PC32 reloc to a non-function sym in
1702 check_relocs. We can't decide accurately between function and
1703 non-function syms in check-relocs; Objects loaded later in
1704 the link may change h->type. So fix it now. */
1705 h
->plt
.offset
= (bfd_vma
) -1;
1707 /* If this is a weak symbol, and there is a real definition, the
1708 processor independent code will have arranged for us to see the
1709 real definition first, and we can just use the same value. */
1710 if (h
->u
.weakdef
!= NULL
)
1712 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1713 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1714 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1715 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1716 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1717 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1721 /* This is a reference to a symbol defined by a dynamic object which
1722 is not a function. */
1724 /* If we are creating a shared library, we must presume that the
1725 only references to the symbol are via the global offset table.
1726 For such cases we need not do anything here; the relocations will
1727 be handled correctly by relocate_section. */
1731 /* If there are no references to this symbol that do not use the
1732 GOT, we don't need to generate a copy reloc. */
1733 if (!h
->non_got_ref
)
1736 /* If -z nocopyreloc was given, we won't generate them either. */
1737 if (info
->nocopyreloc
)
1743 if (ELIMINATE_COPY_RELOCS
)
1745 struct elf64_x86_64_link_hash_entry
* eh
;
1746 struct elf64_x86_64_dyn_relocs
*p
;
1748 eh
= (struct elf64_x86_64_link_hash_entry
*) h
;
1749 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1751 s
= p
->sec
->output_section
;
1752 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1756 /* If we didn't find any dynamic relocs in read-only sections, then
1757 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1767 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
1768 h
->root
.root
.string
);
1772 /* We must allocate the symbol in our .dynbss section, which will
1773 become part of the .bss section of the executable. There will be
1774 an entry for this symbol in the .dynsym section. The dynamic
1775 object will contain position independent code, so all references
1776 from the dynamic object to this symbol will go through the global
1777 offset table. The dynamic linker will use the .dynsym entry to
1778 determine the address it must put in the global offset table, so
1779 both the dynamic object and the regular object will refer to the
1780 same memory location for the variable. */
1782 htab
= elf64_x86_64_hash_table (info
);
1784 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
1785 to copy the initial value out of the dynamic object and into the
1786 runtime process image. */
1787 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1789 htab
->srelbss
->size
+= sizeof (Elf64_External_Rela
);
1795 return _bfd_elf_adjust_dynamic_copy (h
, s
);
1798 /* Allocate space in .plt, .got and associated reloc sections for
1802 elf64_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
1804 struct bfd_link_info
*info
;
1805 struct elf64_x86_64_link_hash_table
*htab
;
1806 struct elf64_x86_64_link_hash_entry
*eh
;
1807 struct elf64_x86_64_dyn_relocs
*p
;
1809 if (h
->root
.type
== bfd_link_hash_indirect
)
1812 if (h
->root
.type
== bfd_link_hash_warning
)
1813 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1814 eh
= (struct elf64_x86_64_link_hash_entry
*) h
;
1816 info
= (struct bfd_link_info
*) inf
;
1817 htab
= elf64_x86_64_hash_table (info
);
1819 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1820 here if it is defined and referenced in a non-shared object. */
1821 if (h
->type
== STT_GNU_IFUNC
1824 asection
*plt
, *gotplt
, *relplt
;
1826 /* Return and discard space for dynamic relocations against it if
1827 it is never referenced in a non-shared object. */
1828 if (!h
->ref_regular
)
1830 if (h
->plt
.refcount
> 0
1831 || h
->got
.refcount
> 0)
1833 h
->got
.offset
= (bfd_vma
) -1;
1834 eh
->dyn_relocs
= NULL
;
1838 /* When building a static executable, use .iplt, .igot.plt and
1839 .rela.iplt sections for STT_GNU_IFUNC symbols. */
1840 if (htab
->splt
!= NULL
)
1843 gotplt
= htab
->sgotplt
;
1844 relplt
= htab
->srelplt
;
1846 /* If this is the first .plt entry, make room for the special
1849 plt
->size
+= PLT_ENTRY_SIZE
;
1854 gotplt
= htab
->igotplt
;
1855 relplt
= htab
->irelplt
;
1858 /* Don't update value of STT_GNU_IFUNC symbol to PLT. We need
1859 the original value for R_X86_64_IRELATIVE. */
1860 h
->plt
.offset
= plt
->size
;
1862 /* Make room for this entry in the .plt/.iplt section. */
1863 plt
->size
+= PLT_ENTRY_SIZE
;
1865 /* We also need to make an entry in the .got.plt/.got.iplt
1866 section, which will be placed in the .got section by the
1868 gotplt
->size
+= GOT_ENTRY_SIZE
;
1870 /* We also need to make an entry in the .rela.plt/.rela.iplt
1872 relplt
->size
+= sizeof (Elf64_External_Rela
);
1873 relplt
->reloc_count
++;
1875 /* We need dynamic relocation for STT_GNU_IFUNC symbol only
1876 when there is a non-GOT reference in a shared object. */
1879 eh
->dyn_relocs
= NULL
;
1881 /* Finally, allocate space. */
1882 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1884 asection
* sreloc
= elf_section_data (p
->sec
)->sreloc
;
1885 sreloc
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1888 /* For STT_GNU_IFUNC symbol, .got.plt has the real function
1889 addres and .got has the PLT entry adddress. We will load
1890 the GOT entry with the PLT entry in finish_dynamic_symbol if
1891 it is used. For branch, it uses .got.plt. For symbol value,
1892 1. Use .got.plt in a shared object if it is forced local or
1894 2. Use .got.plt in a non-shared object if pointer equality
1896 3. Use .got.plt if .got isn't used.
1897 4. Otherwise use .got so that it can be shared among different
1898 objects at run-time.
1899 We only need to relocate .got entry in shared object. */
1901 && (h
->dynindx
== -1
1902 || h
->forced_local
))
1904 && !h
->pointer_equality_needed
)
1905 || htab
->sgot
== NULL
)
1908 h
->got
.offset
= (bfd_vma
) -1;
1912 h
->got
.offset
= htab
->sgot
->size
;
1913 htab
->sgot
->size
+= GOT_ENTRY_SIZE
;
1915 htab
->srelgot
->size
+= sizeof (Elf64_External_Rela
);
1920 else if (htab
->elf
.dynamic_sections_created
1921 && h
->plt
.refcount
> 0)
1923 /* Make sure this symbol is output as a dynamic symbol.
1924 Undefined weak syms won't yet be marked as dynamic. */
1925 if (h
->dynindx
== -1
1926 && !h
->forced_local
)
1928 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1933 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1935 asection
*s
= htab
->splt
;
1937 /* If this is the first .plt entry, make room for the special
1940 s
->size
+= PLT_ENTRY_SIZE
;
1942 h
->plt
.offset
= s
->size
;
1944 /* If this symbol is not defined in a regular file, and we are
1945 not generating a shared library, then set the symbol to this
1946 location in the .plt. This is required to make function
1947 pointers compare as equal between the normal executable and
1948 the shared library. */
1952 h
->root
.u
.def
.section
= s
;
1953 h
->root
.u
.def
.value
= h
->plt
.offset
;
1956 /* Make room for this entry. */
1957 s
->size
+= PLT_ENTRY_SIZE
;
1959 /* We also need to make an entry in the .got.plt section, which
1960 will be placed in the .got section by the linker script. */
1961 htab
->sgotplt
->size
+= GOT_ENTRY_SIZE
;
1963 /* We also need to make an entry in the .rela.plt section. */
1964 htab
->srelplt
->size
+= sizeof (Elf64_External_Rela
);
1965 htab
->srelplt
->reloc_count
++;
1969 h
->plt
.offset
= (bfd_vma
) -1;
1975 h
->plt
.offset
= (bfd_vma
) -1;
1979 eh
->tlsdesc_got
= (bfd_vma
) -1;
1981 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
1982 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
1983 if (h
->got
.refcount
> 0
1986 && elf64_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
1988 h
->got
.offset
= (bfd_vma
) -1;
1990 else if (h
->got
.refcount
> 0)
1994 int tls_type
= elf64_x86_64_hash_entry (h
)->tls_type
;
1996 /* Make sure this symbol is output as a dynamic symbol.
1997 Undefined weak syms won't yet be marked as dynamic. */
1998 if (h
->dynindx
== -1
1999 && !h
->forced_local
)
2001 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2005 if (GOT_TLS_GDESC_P (tls_type
))
2007 eh
->tlsdesc_got
= htab
->sgotplt
->size
2008 - elf64_x86_64_compute_jump_table_size (htab
);
2009 htab
->sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2010 h
->got
.offset
= (bfd_vma
) -2;
2012 if (! GOT_TLS_GDESC_P (tls_type
)
2013 || GOT_TLS_GD_P (tls_type
))
2016 h
->got
.offset
= s
->size
;
2017 s
->size
+= GOT_ENTRY_SIZE
;
2018 if (GOT_TLS_GD_P (tls_type
))
2019 s
->size
+= GOT_ENTRY_SIZE
;
2021 dyn
= htab
->elf
.dynamic_sections_created
;
2022 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2024 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2025 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2026 || tls_type
== GOT_TLS_IE
)
2027 htab
->srelgot
->size
+= sizeof (Elf64_External_Rela
);
2028 else if (GOT_TLS_GD_P (tls_type
))
2029 htab
->srelgot
->size
+= 2 * sizeof (Elf64_External_Rela
);
2030 else if (! GOT_TLS_GDESC_P (tls_type
)
2031 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2032 || h
->root
.type
!= bfd_link_hash_undefweak
)
2034 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2035 htab
->srelgot
->size
+= sizeof (Elf64_External_Rela
);
2036 if (GOT_TLS_GDESC_P (tls_type
))
2038 htab
->srelplt
->size
+= sizeof (Elf64_External_Rela
);
2039 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2043 h
->got
.offset
= (bfd_vma
) -1;
2045 if (eh
->dyn_relocs
== NULL
)
2048 /* In the shared -Bsymbolic case, discard space allocated for
2049 dynamic pc-relative relocs against symbols which turn out to be
2050 defined in regular objects. For the normal shared case, discard
2051 space for pc-relative relocs that have become local due to symbol
2052 visibility changes. */
2056 /* Relocs that use pc_count are those that appear on a call
2057 insn, or certain REL relocs that can generated via assembly.
2058 We want calls to protected symbols to resolve directly to the
2059 function rather than going via the plt. If people want
2060 function pointer comparisons to work as expected then they
2061 should avoid writing weird assembly. */
2062 if (SYMBOL_CALLS_LOCAL (info
, h
))
2064 struct elf64_x86_64_dyn_relocs
**pp
;
2066 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2068 p
->count
-= p
->pc_count
;
2077 /* Also discard relocs on undefined weak syms with non-default
2079 if (eh
->dyn_relocs
!= NULL
2080 && h
->root
.type
== bfd_link_hash_undefweak
)
2082 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2083 eh
->dyn_relocs
= NULL
;
2085 /* Make sure undefined weak symbols are output as a dynamic
2087 else if (h
->dynindx
== -1
2088 && ! h
->forced_local
2089 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2094 else if (ELIMINATE_COPY_RELOCS
)
2096 /* For the non-shared case, discard space for relocs against
2097 symbols which turn out to need copy relocs or are not
2103 || (htab
->elf
.dynamic_sections_created
2104 && (h
->root
.type
== bfd_link_hash_undefweak
2105 || h
->root
.type
== bfd_link_hash_undefined
))))
2107 /* Make sure this symbol is output as a dynamic symbol.
2108 Undefined weak syms won't yet be marked as dynamic. */
2109 if (h
->dynindx
== -1
2110 && ! h
->forced_local
2111 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2114 /* If that succeeded, we know we'll be keeping all the
2116 if (h
->dynindx
!= -1)
2120 eh
->dyn_relocs
= NULL
;
2125 /* Finally, allocate space. */
2126 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2130 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2132 BFD_ASSERT (sreloc
!= NULL
);
2134 sreloc
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
2140 /* Find any dynamic relocs that apply to read-only sections. */
2143 elf64_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2145 struct elf64_x86_64_link_hash_entry
*eh
;
2146 struct elf64_x86_64_dyn_relocs
*p
;
2148 if (h
->root
.type
== bfd_link_hash_warning
)
2149 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2151 eh
= (struct elf64_x86_64_link_hash_entry
*) h
;
2152 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2154 asection
*s
= p
->sec
->output_section
;
2156 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2158 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2160 info
->flags
|= DF_TEXTREL
;
2162 /* Not an error, just cut short the traversal. */
2169 /* Set the sizes of the dynamic sections. */
2172 elf64_x86_64_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2173 struct bfd_link_info
*info
)
2175 struct elf64_x86_64_link_hash_table
*htab
;
2181 htab
= elf64_x86_64_hash_table (info
);
2182 dynobj
= htab
->elf
.dynobj
;
2186 if (htab
->elf
.dynamic_sections_created
)
2188 /* Set the contents of the .interp section to the interpreter. */
2189 if (info
->executable
)
2191 s
= bfd_get_section_by_name (dynobj
, ".interp");
2194 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2195 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2199 /* Set up .got offsets for local syms, and space for local dynamic
2201 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2203 bfd_signed_vma
*local_got
;
2204 bfd_signed_vma
*end_local_got
;
2205 char *local_tls_type
;
2206 bfd_vma
*local_tlsdesc_gotent
;
2207 bfd_size_type locsymcount
;
2208 Elf_Internal_Shdr
*symtab_hdr
;
2211 if (! is_x86_64_elf (ibfd
))
2214 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2216 struct elf64_x86_64_dyn_relocs
*p
;
2218 for (p
= (struct elf64_x86_64_dyn_relocs
*)
2219 (elf_section_data (s
)->local_dynrel
);
2223 if (!bfd_is_abs_section (p
->sec
)
2224 && bfd_is_abs_section (p
->sec
->output_section
))
2226 /* Input section has been discarded, either because
2227 it is a copy of a linkonce section or due to
2228 linker script /DISCARD/, so we'll be discarding
2231 else if (p
->count
!= 0)
2233 srel
= elf_section_data (p
->sec
)->sreloc
;
2234 srel
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
2235 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2236 info
->flags
|= DF_TEXTREL
;
2241 local_got
= elf_local_got_refcounts (ibfd
);
2245 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2246 locsymcount
= symtab_hdr
->sh_info
;
2247 end_local_got
= local_got
+ locsymcount
;
2248 local_tls_type
= elf64_x86_64_local_got_tls_type (ibfd
);
2249 local_tlsdesc_gotent
= elf64_x86_64_local_tlsdesc_gotent (ibfd
);
2251 srel
= htab
->srelgot
;
2252 for (; local_got
< end_local_got
;
2253 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2255 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2258 if (GOT_TLS_GDESC_P (*local_tls_type
))
2260 *local_tlsdesc_gotent
= htab
->sgotplt
->size
2261 - elf64_x86_64_compute_jump_table_size (htab
);
2262 htab
->sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2263 *local_got
= (bfd_vma
) -2;
2265 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2266 || GOT_TLS_GD_P (*local_tls_type
))
2268 *local_got
= s
->size
;
2269 s
->size
+= GOT_ENTRY_SIZE
;
2270 if (GOT_TLS_GD_P (*local_tls_type
))
2271 s
->size
+= GOT_ENTRY_SIZE
;
2274 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2275 || *local_tls_type
== GOT_TLS_IE
)
2277 if (GOT_TLS_GDESC_P (*local_tls_type
))
2279 htab
->srelplt
->size
+= sizeof (Elf64_External_Rela
);
2280 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2282 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2283 || GOT_TLS_GD_P (*local_tls_type
))
2284 srel
->size
+= sizeof (Elf64_External_Rela
);
2288 *local_got
= (bfd_vma
) -1;
2292 if (htab
->tls_ld_got
.refcount
> 0)
2294 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2296 htab
->tls_ld_got
.offset
= htab
->sgot
->size
;
2297 htab
->sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
2298 htab
->srelgot
->size
+= sizeof (Elf64_External_Rela
);
2301 htab
->tls_ld_got
.offset
= -1;
2303 /* Allocate global sym .plt and .got entries, and space for global
2304 sym dynamic relocs. */
2305 elf_link_hash_traverse (&htab
->elf
, elf64_x86_64_allocate_dynrelocs
,
2308 /* For every jump slot reserved in the sgotplt, reloc_count is
2309 incremented. However, when we reserve space for TLS descriptors,
2310 it's not incremented, so in order to compute the space reserved
2311 for them, it suffices to multiply the reloc count by the jump
2314 htab
->sgotplt_jump_table_size
2315 = elf64_x86_64_compute_jump_table_size (htab
);
2317 if (htab
->tlsdesc_plt
)
2319 /* If we're not using lazy TLS relocations, don't generate the
2320 PLT and GOT entries they require. */
2321 if ((info
->flags
& DF_BIND_NOW
))
2322 htab
->tlsdesc_plt
= 0;
2325 htab
->tlsdesc_got
= htab
->sgot
->size
;
2326 htab
->sgot
->size
+= GOT_ENTRY_SIZE
;
2327 /* Reserve room for the initial entry.
2328 FIXME: we could probably do away with it in this case. */
2329 if (htab
->splt
->size
== 0)
2330 htab
->splt
->size
+= PLT_ENTRY_SIZE
;
2331 htab
->tlsdesc_plt
= htab
->splt
->size
;
2332 htab
->splt
->size
+= PLT_ENTRY_SIZE
;
2336 /* We now have determined the sizes of the various dynamic sections.
2337 Allocate memory for them. */
2339 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2341 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2346 || s
== htab
->sgotplt
2348 || s
== htab
->igotplt
2349 || s
== htab
->sdynbss
)
2351 /* Strip this section if we don't need it; see the
2354 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2356 if (s
->size
!= 0 && s
!= htab
->srelplt
)
2359 /* We use the reloc_count field as a counter if we need
2360 to copy relocs into the output file. */
2361 if (s
!= htab
->srelplt
)
2366 /* It's not one of our sections, so don't allocate space. */
2372 /* If we don't need this section, strip it from the
2373 output file. This is mostly to handle .rela.bss and
2374 .rela.plt. We must create both sections in
2375 create_dynamic_sections, because they must be created
2376 before the linker maps input sections to output
2377 sections. The linker does that before
2378 adjust_dynamic_symbol is called, and it is that
2379 function which decides whether anything needs to go
2380 into these sections. */
2382 s
->flags
|= SEC_EXCLUDE
;
2386 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2389 /* Allocate memory for the section contents. We use bfd_zalloc
2390 here in case unused entries are not reclaimed before the
2391 section's contents are written out. This should not happen,
2392 but this way if it does, we get a R_X86_64_NONE reloc instead
2394 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2395 if (s
->contents
== NULL
)
2399 if (htab
->elf
.dynamic_sections_created
)
2401 /* Add some entries to the .dynamic section. We fill in the
2402 values later, in elf64_x86_64_finish_dynamic_sections, but we
2403 must add the entries now so that we get the correct size for
2404 the .dynamic section. The DT_DEBUG entry is filled in by the
2405 dynamic linker and used by the debugger. */
2406 #define add_dynamic_entry(TAG, VAL) \
2407 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2409 if (info
->executable
)
2411 if (!add_dynamic_entry (DT_DEBUG
, 0))
2415 if (htab
->splt
->size
!= 0)
2417 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2418 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2419 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2420 || !add_dynamic_entry (DT_JMPREL
, 0))
2423 if (htab
->tlsdesc_plt
2424 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
2425 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
2431 if (!add_dynamic_entry (DT_RELA
, 0)
2432 || !add_dynamic_entry (DT_RELASZ
, 0)
2433 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
2436 /* If any dynamic relocs apply to a read-only section,
2437 then we need a DT_TEXTREL entry. */
2438 if ((info
->flags
& DF_TEXTREL
) == 0)
2439 elf_link_hash_traverse (&htab
->elf
,
2440 elf64_x86_64_readonly_dynrelocs
,
2443 if ((info
->flags
& DF_TEXTREL
) != 0)
2445 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2450 #undef add_dynamic_entry
2456 elf64_x86_64_always_size_sections (bfd
*output_bfd
,
2457 struct bfd_link_info
*info
)
2459 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2463 struct elf_link_hash_entry
*tlsbase
;
2465 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2466 "_TLS_MODULE_BASE_",
2467 FALSE
, FALSE
, FALSE
);
2469 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2471 struct bfd_link_hash_entry
*bh
= NULL
;
2472 const struct elf_backend_data
*bed
2473 = get_elf_backend_data (output_bfd
);
2475 if (!(_bfd_generic_link_add_one_symbol
2476 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2477 tls_sec
, 0, NULL
, FALSE
,
2478 bed
->collect
, &bh
)))
2481 elf64_x86_64_hash_table (info
)->tls_module_base
= bh
;
2483 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2484 tlsbase
->def_regular
= 1;
2485 tlsbase
->other
= STV_HIDDEN
;
2486 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2493 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2494 executables. Rather than setting it to the beginning of the TLS
2495 section, we have to set it to the end. This function may be called
2496 multiple times, it is idempotent. */
2499 elf64_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
2501 struct bfd_link_hash_entry
*base
;
2503 if (!info
->executable
)
2506 base
= elf64_x86_64_hash_table (info
)->tls_module_base
;
2511 base
->u
.def
.value
= elf_hash_table (info
)->tls_size
;
2514 /* Return the base VMA address which should be subtracted from real addresses
2515 when resolving @dtpoff relocation.
2516 This is PT_TLS segment p_vaddr. */
2519 elf64_x86_64_dtpoff_base (struct bfd_link_info
*info
)
2521 /* If tls_sec is NULL, we should have signalled an error already. */
2522 if (elf_hash_table (info
)->tls_sec
== NULL
)
2524 return elf_hash_table (info
)->tls_sec
->vma
;
2527 /* Return the relocation value for @tpoff relocation
2528 if STT_TLS virtual address is ADDRESS. */
2531 elf64_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2533 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2535 /* If tls_segment is NULL, we should have signalled an error already. */
2536 if (htab
->tls_sec
== NULL
)
2538 return address
- htab
->tls_size
- htab
->tls_sec
->vma
;
2541 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
2545 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
2547 /* Opcode Instruction
2550 0x0f 0x8x conditional jump */
2552 && (contents
[offset
- 1] == 0xe8
2553 || contents
[offset
- 1] == 0xe9))
2555 && contents
[offset
- 2] == 0x0f
2556 && (contents
[offset
- 1] & 0xf0) == 0x80));
2559 /* Relocate an x86_64 ELF section. */
2562 elf64_x86_64_relocate_section (bfd
*output_bfd
, struct bfd_link_info
*info
,
2563 bfd
*input_bfd
, asection
*input_section
,
2564 bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
2565 Elf_Internal_Sym
*local_syms
,
2566 asection
**local_sections
)
2568 struct elf64_x86_64_link_hash_table
*htab
;
2569 Elf_Internal_Shdr
*symtab_hdr
;
2570 struct elf_link_hash_entry
**sym_hashes
;
2571 bfd_vma
*local_got_offsets
;
2572 bfd_vma
*local_tlsdesc_gotents
;
2573 Elf_Internal_Rela
*rel
;
2574 Elf_Internal_Rela
*relend
;
2576 BFD_ASSERT (is_x86_64_elf (input_bfd
));
2578 htab
= elf64_x86_64_hash_table (info
);
2579 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2580 sym_hashes
= elf_sym_hashes (input_bfd
);
2581 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2582 local_tlsdesc_gotents
= elf64_x86_64_local_tlsdesc_gotent (input_bfd
);
2584 elf64_x86_64_set_tls_module_base (info
);
2587 relend
= relocs
+ input_section
->reloc_count
;
2588 for (; rel
< relend
; rel
++)
2590 unsigned int r_type
;
2591 reloc_howto_type
*howto
;
2592 unsigned long r_symndx
;
2593 struct elf_link_hash_entry
*h
;
2594 Elf_Internal_Sym
*sym
;
2596 bfd_vma off
, offplt
;
2598 bfd_boolean unresolved_reloc
;
2599 bfd_reloc_status_type r
;
2603 r_type
= ELF64_R_TYPE (rel
->r_info
);
2604 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
2605 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
2608 if (r_type
>= R_X86_64_max
)
2610 bfd_set_error (bfd_error_bad_value
);
2614 howto
= x86_64_elf_howto_table
+ r_type
;
2615 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2619 unresolved_reloc
= FALSE
;
2620 if (r_symndx
< symtab_hdr
->sh_info
)
2622 sym
= local_syms
+ r_symndx
;
2623 sec
= local_sections
[r_symndx
];
2625 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2631 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2632 r_symndx
, symtab_hdr
, sym_hashes
,
2634 unresolved_reloc
, warned
);
2637 if (sec
!= NULL
&& elf_discarded_section (sec
))
2639 /* For relocs against symbols from removed linkonce sections,
2640 or sections discarded by a linker script, we just want the
2641 section contents zeroed. Avoid any special processing. */
2642 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
2648 if (info
->relocatable
)
2651 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2652 it here if it is defined in a non-shared object. */
2654 && h
->type
== STT_GNU_IFUNC
2660 if ((input_section
->flags
& SEC_ALLOC
) == 0
2661 || h
->plt
.offset
== (bfd_vma
) -1)
2664 /* STT_GNU_IFUNC symbol must go through PLT. */
2665 plt
= htab
->splt
? htab
->splt
: htab
->iplt
;
2666 relocation
= (plt
->output_section
->vma
2667 + plt
->output_offset
+ h
->plt
.offset
);
2672 (*_bfd_error_handler
)
2673 (_("%B: relocation %s against STT_GNU_IFUNC "
2674 "symbol `%s' isn't handled by %s"), input_bfd
,
2675 x86_64_elf_howto_table
[r_type
].name
,
2676 h
->root
.root
.string
, __FUNCTION__
);
2677 bfd_set_error (bfd_error_bad_value
);
2686 if (rel
->r_addend
!= 0)
2688 (*_bfd_error_handler
)
2689 (_("%B: relocation %s against STT_GNU_IFUNC "
2690 "symbol `%s' has non-zero addend: %d"),
2691 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
2692 h
->root
.root
.string
, rel
->r_addend
);
2693 bfd_set_error (bfd_error_bad_value
);
2697 /* Generate dynamic relcoation only when there is a
2698 non-GOF reference in a shared object. */
2699 if (info
->shared
&& h
->non_got_ref
)
2701 Elf_Internal_Rela outrel
;
2705 /* Need a dynamic relocation get the the real
2706 function address. */
2707 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2711 if (outrel
.r_offset
== (bfd_vma
) -1
2712 || outrel
.r_offset
== (bfd_vma
) -2)
2715 outrel
.r_offset
+= (input_section
->output_section
->vma
2716 + input_section
->output_offset
);
2718 if (h
->dynindx
== -1
2721 /* This symbol is resolved locally. */
2722 outrel
.r_info
= ELF64_R_INFO (0, R_X86_64_IRELATIVE
);
2723 outrel
.r_addend
= (h
->root
.u
.def
.value
2724 + h
->root
.u
.def
.section
->output_section
->vma
2725 + h
->root
.u
.def
.section
->output_offset
);
2729 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2730 outrel
.r_addend
= 0;
2733 sreloc
= elf_section_data (input_section
)->sreloc
;
2734 loc
= sreloc
->contents
;
2735 loc
+= (sreloc
->reloc_count
++
2736 * sizeof (Elf64_External_Rela
));
2737 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2739 /* If this reloc is against an external symbol, we
2740 do not want to fiddle with the addend. Otherwise,
2741 we need to include the symbol value so that it
2742 becomes an addend for the dynamic reloc. For an
2743 internal symbol, we have updated addend. */
2750 case R_X86_64_PLT32
:
2753 case R_X86_64_GOTPCREL
:
2754 case R_X86_64_GOTPCREL64
:
2755 base_got
= htab
->sgot
;
2756 off
= h
->got
.offset
;
2758 if (base_got
== NULL
)
2761 if (off
== (bfd_vma
) -1)
2763 /* We can't use h->got.offset here to save state, or
2764 even just remember the offset, as finish_dynamic_symbol
2765 would use that as offset into .got. */
2767 if (htab
->splt
!= NULL
)
2769 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
2770 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2771 base_got
= htab
->sgotplt
;
2775 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
2776 off
= plt_index
* GOT_ENTRY_SIZE
;
2777 base_got
= htab
->igotplt
;
2780 if (h
->dynindx
== -1
2784 /* This references the local defitionion. We must
2785 initialize this entry in the global offset table.
2786 Since the offset must always be a multiple of 8,
2787 we use the least significant bit to record
2788 whether we have initialized it already.
2790 When doing a dynamic link, we create a .rela.got
2791 relocation entry to initialize the value. This
2792 is done in the finish_dynamic_symbol routine. */
2797 bfd_put_64 (output_bfd
, relocation
,
2798 base_got
->contents
+ off
);
2799 /* Note that this is harmless for the GOTPLT64
2800 case, as -1 | 1 still is -1. */
2806 relocation
= (base_got
->output_section
->vma
2807 + base_got
->output_offset
+ off
);
2809 if (r_type
!= R_X86_64_GOTPCREL
2810 && r_type
!= R_X86_64_GOTPCREL64
)
2813 if (htab
->splt
!= NULL
)
2814 gotplt
= htab
->sgotplt
;
2816 gotplt
= htab
->igotplt
;
2817 relocation
-= (gotplt
->output_section
->vma
2818 - gotplt
->output_offset
);
2825 /* When generating a shared object, the relocations handled here are
2826 copied into the output file to be resolved at run time. */
2829 case R_X86_64_GOT32
:
2830 case R_X86_64_GOT64
:
2831 /* Relocation is to the entry for this symbol in the global
2833 case R_X86_64_GOTPCREL
:
2834 case R_X86_64_GOTPCREL64
:
2835 /* Use global offset table entry as symbol value. */
2836 case R_X86_64_GOTPLT64
:
2837 /* This is the same as GOT64 for relocation purposes, but
2838 indicates the existence of a PLT entry. The difficulty is,
2839 that we must calculate the GOT slot offset from the PLT
2840 offset, if this symbol got a PLT entry (it was global).
2841 Additionally if it's computed from the PLT entry, then that
2842 GOT offset is relative to .got.plt, not to .got. */
2843 base_got
= htab
->sgot
;
2845 if (htab
->sgot
== NULL
)
2852 off
= h
->got
.offset
;
2854 && h
->plt
.offset
!= (bfd_vma
)-1
2855 && off
== (bfd_vma
)-1)
2857 /* We can't use h->got.offset here to save
2858 state, or even just remember the offset, as
2859 finish_dynamic_symbol would use that as offset into
2861 bfd_vma plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
2862 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2863 base_got
= htab
->sgotplt
;
2866 dyn
= htab
->elf
.dynamic_sections_created
;
2868 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2870 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2871 || (ELF_ST_VISIBILITY (h
->other
)
2872 && h
->root
.type
== bfd_link_hash_undefweak
))
2874 /* This is actually a static link, or it is a -Bsymbolic
2875 link and the symbol is defined locally, or the symbol
2876 was forced to be local because of a version file. We
2877 must initialize this entry in the global offset table.
2878 Since the offset must always be a multiple of 8, we
2879 use the least significant bit to record whether we
2880 have initialized it already.
2882 When doing a dynamic link, we create a .rela.got
2883 relocation entry to initialize the value. This is
2884 done in the finish_dynamic_symbol routine. */
2889 bfd_put_64 (output_bfd
, relocation
,
2890 base_got
->contents
+ off
);
2891 /* Note that this is harmless for the GOTPLT64 case,
2892 as -1 | 1 still is -1. */
2897 unresolved_reloc
= FALSE
;
2901 if (local_got_offsets
== NULL
)
2904 off
= local_got_offsets
[r_symndx
];
2906 /* The offset must always be a multiple of 8. We use
2907 the least significant bit to record whether we have
2908 already generated the necessary reloc. */
2913 bfd_put_64 (output_bfd
, relocation
,
2914 base_got
->contents
+ off
);
2919 Elf_Internal_Rela outrel
;
2922 /* We need to generate a R_X86_64_RELATIVE reloc
2923 for the dynamic linker. */
2928 outrel
.r_offset
= (base_got
->output_section
->vma
2929 + base_got
->output_offset
2931 outrel
.r_info
= ELF64_R_INFO (0, R_X86_64_RELATIVE
);
2932 outrel
.r_addend
= relocation
;
2934 loc
+= s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2935 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2938 local_got_offsets
[r_symndx
] |= 1;
2942 if (off
>= (bfd_vma
) -2)
2945 relocation
= base_got
->output_section
->vma
2946 + base_got
->output_offset
+ off
;
2947 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
2948 relocation
-= htab
->sgotplt
->output_section
->vma
2949 - htab
->sgotplt
->output_offset
;
2953 case R_X86_64_GOTOFF64
:
2954 /* Relocation is relative to the start of the global offset
2957 /* Check to make sure it isn't a protected function symbol
2958 for shared library since it may not be local when used
2959 as function address. */
2963 && h
->type
== STT_FUNC
2964 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2966 (*_bfd_error_handler
)
2967 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
2968 input_bfd
, h
->root
.root
.string
);
2969 bfd_set_error (bfd_error_bad_value
);
2973 /* Note that sgot is not involved in this
2974 calculation. We always want the start of .got.plt. If we
2975 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2976 permitted by the ABI, we might have to change this
2978 relocation
-= htab
->sgotplt
->output_section
->vma
2979 + htab
->sgotplt
->output_offset
;
2982 case R_X86_64_GOTPC32
:
2983 case R_X86_64_GOTPC64
:
2984 /* Use global offset table as symbol value. */
2985 relocation
= htab
->sgotplt
->output_section
->vma
2986 + htab
->sgotplt
->output_offset
;
2987 unresolved_reloc
= FALSE
;
2990 case R_X86_64_PLTOFF64
:
2991 /* Relocation is PLT entry relative to GOT. For local
2992 symbols it's the symbol itself relative to GOT. */
2994 /* See PLT32 handling. */
2995 && h
->plt
.offset
!= (bfd_vma
) -1
2996 && htab
->splt
!= NULL
)
2998 relocation
= (htab
->splt
->output_section
->vma
2999 + htab
->splt
->output_offset
3001 unresolved_reloc
= FALSE
;
3004 relocation
-= htab
->sgotplt
->output_section
->vma
3005 + htab
->sgotplt
->output_offset
;
3008 case R_X86_64_PLT32
:
3009 /* Relocation is to the entry for this symbol in the
3010 procedure linkage table. */
3012 /* Resolve a PLT32 reloc against a local symbol directly,
3013 without using the procedure linkage table. */
3017 if (h
->plt
.offset
== (bfd_vma
) -1
3018 || htab
->splt
== NULL
)
3020 /* We didn't make a PLT entry for this symbol. This
3021 happens when statically linking PIC code, or when
3022 using -Bsymbolic. */
3026 relocation
= (htab
->splt
->output_section
->vma
3027 + htab
->splt
->output_offset
3029 unresolved_reloc
= FALSE
;
3036 && (input_section
->flags
& SEC_ALLOC
) != 0
3037 && (input_section
->flags
& SEC_READONLY
) != 0
3040 bfd_boolean fail
= FALSE
;
3042 = (r_type
== R_X86_64_PC32
3043 && is_32bit_relative_branch (contents
, rel
->r_offset
));
3045 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
3047 /* Symbol is referenced locally. Make sure it is
3048 defined locally or for a branch. */
3049 fail
= !h
->def_regular
&& !branch
;
3053 /* Symbol isn't referenced locally. We only allow
3054 branch to symbol with non-default visibility. */
3056 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
3063 const char *pic
= "";
3065 switch (ELF_ST_VISIBILITY (h
->other
))
3068 v
= _("hidden symbol");
3071 v
= _("internal symbol");
3074 v
= _("protected symbol");
3078 pic
= _("; recompile with -fPIC");
3083 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3085 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3087 (*_bfd_error_handler
) (fmt
, input_bfd
,
3088 x86_64_elf_howto_table
[r_type
].name
,
3089 v
, h
->root
.root
.string
, pic
);
3090 bfd_set_error (bfd_error_bad_value
);
3101 /* FIXME: The ABI says the linker should make sure the value is
3102 the same when it's zeroextended to 64 bit. */
3104 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3109 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3110 || h
->root
.type
!= bfd_link_hash_undefweak
)
3111 && (! IS_X86_64_PCREL_TYPE (r_type
)
3112 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
3113 || (ELIMINATE_COPY_RELOCS
3120 || h
->root
.type
== bfd_link_hash_undefweak
3121 || h
->root
.type
== bfd_link_hash_undefined
)))
3123 Elf_Internal_Rela outrel
;
3125 bfd_boolean skip
, relocate
;
3128 /* When generating a shared object, these relocations
3129 are copied into the output file to be resolved at run
3135 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3137 if (outrel
.r_offset
== (bfd_vma
) -1)
3139 else if (outrel
.r_offset
== (bfd_vma
) -2)
3140 skip
= TRUE
, relocate
= TRUE
;
3142 outrel
.r_offset
+= (input_section
->output_section
->vma
3143 + input_section
->output_offset
);
3146 memset (&outrel
, 0, sizeof outrel
);
3148 /* h->dynindx may be -1 if this symbol was marked to
3152 && (IS_X86_64_PCREL_TYPE (r_type
)
3154 || ! SYMBOLIC_BIND (info
, h
)
3155 || ! h
->def_regular
))
3157 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
3158 outrel
.r_addend
= rel
->r_addend
;
3162 /* This symbol is local, or marked to become local. */
3163 if (r_type
== R_X86_64_64
)
3166 outrel
.r_info
= ELF64_R_INFO (0, R_X86_64_RELATIVE
);
3167 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3173 if (bfd_is_abs_section (sec
))
3175 else if (sec
== NULL
|| sec
->owner
== NULL
)
3177 bfd_set_error (bfd_error_bad_value
);
3184 /* We are turning this relocation into one
3185 against a section symbol. It would be
3186 proper to subtract the symbol's value,
3187 osec->vma, from the emitted reloc addend,
3188 but ld.so expects buggy relocs. */
3189 osec
= sec
->output_section
;
3190 sindx
= elf_section_data (osec
)->dynindx
;
3193 asection
*oi
= htab
->elf
.text_index_section
;
3194 sindx
= elf_section_data (oi
)->dynindx
;
3196 BFD_ASSERT (sindx
!= 0);
3199 outrel
.r_info
= ELF64_R_INFO (sindx
, r_type
);
3200 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3204 sreloc
= elf_section_data (input_section
)->sreloc
;
3206 BFD_ASSERT (sreloc
!= NULL
&& sreloc
->contents
!= NULL
);
3208 loc
= sreloc
->contents
;
3209 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3210 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3212 /* If this reloc is against an external symbol, we do
3213 not want to fiddle with the addend. Otherwise, we
3214 need to include the symbol value so that it becomes
3215 an addend for the dynamic reloc. */
3222 case R_X86_64_TLSGD
:
3223 case R_X86_64_GOTPC32_TLSDESC
:
3224 case R_X86_64_TLSDESC_CALL
:
3225 case R_X86_64_GOTTPOFF
:
3226 tls_type
= GOT_UNKNOWN
;
3227 if (h
== NULL
&& local_got_offsets
)
3228 tls_type
= elf64_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
3230 tls_type
= elf64_x86_64_hash_entry (h
)->tls_type
;
3232 if (! elf64_x86_64_tls_transition (info
, input_bfd
,
3233 input_section
, contents
,
3234 symtab_hdr
, sym_hashes
,
3235 &r_type
, tls_type
, rel
,
3239 if (r_type
== R_X86_64_TPOFF32
)
3241 bfd_vma roff
= rel
->r_offset
;
3243 BFD_ASSERT (! unresolved_reloc
);
3245 if (ELF64_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
3247 /* GD->LE transition.
3248 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3249 .word 0x6666; rex64; call __tls_get_addr
3252 leaq foo@tpoff(%rax), %rax */
3253 memcpy (contents
+ roff
- 4,
3254 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3256 bfd_put_32 (output_bfd
,
3257 elf64_x86_64_tpoff (info
, relocation
),
3258 contents
+ roff
+ 8);
3259 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
3263 else if (ELF64_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
3265 /* GDesc -> LE transition.
3266 It's originally something like:
3267 leaq x@tlsdesc(%rip), %rax
3273 unsigned int val
, type
, type2
;
3275 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3276 type2
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3277 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3278 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
3279 contents
+ roff
- 3);
3280 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
3281 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3282 contents
+ roff
- 1);
3283 bfd_put_32 (output_bfd
,
3284 elf64_x86_64_tpoff (info
, relocation
),
3288 else if (ELF64_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
3290 /* GDesc -> LE transition.
3295 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3296 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3299 else if (ELF64_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
3301 /* IE->LE transition:
3302 Originally it can be one of:
3303 movq foo@gottpoff(%rip), %reg
3304 addq foo@gottpoff(%rip), %reg
3307 leaq foo(%reg), %reg
3310 unsigned int val
, type
, reg
;
3312 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3313 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3314 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3320 bfd_put_8 (output_bfd
, 0x49,
3321 contents
+ roff
- 3);
3322 bfd_put_8 (output_bfd
, 0xc7,
3323 contents
+ roff
- 2);
3324 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3325 contents
+ roff
- 1);
3329 /* addq -> addq - addressing with %rsp/%r12 is
3332 bfd_put_8 (output_bfd
, 0x49,
3333 contents
+ roff
- 3);
3334 bfd_put_8 (output_bfd
, 0x81,
3335 contents
+ roff
- 2);
3336 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3337 contents
+ roff
- 1);
3343 bfd_put_8 (output_bfd
, 0x4d,
3344 contents
+ roff
- 3);
3345 bfd_put_8 (output_bfd
, 0x8d,
3346 contents
+ roff
- 2);
3347 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
3348 contents
+ roff
- 1);
3350 bfd_put_32 (output_bfd
,
3351 elf64_x86_64_tpoff (info
, relocation
),
3359 if (htab
->sgot
== NULL
)
3364 off
= h
->got
.offset
;
3365 offplt
= elf64_x86_64_hash_entry (h
)->tlsdesc_got
;
3369 if (local_got_offsets
== NULL
)
3372 off
= local_got_offsets
[r_symndx
];
3373 offplt
= local_tlsdesc_gotents
[r_symndx
];
3380 Elf_Internal_Rela outrel
;
3385 if (htab
->srelgot
== NULL
)
3388 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3390 if (GOT_TLS_GDESC_P (tls_type
))
3392 outrel
.r_info
= ELF64_R_INFO (indx
, R_X86_64_TLSDESC
);
3393 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
3394 + 2 * GOT_ENTRY_SIZE
<= htab
->sgotplt
->size
);
3395 outrel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3396 + htab
->sgotplt
->output_offset
3398 + htab
->sgotplt_jump_table_size
);
3399 sreloc
= htab
->srelplt
;
3400 loc
= sreloc
->contents
;
3401 loc
+= sreloc
->reloc_count
++
3402 * sizeof (Elf64_External_Rela
);
3403 BFD_ASSERT (loc
+ sizeof (Elf64_External_Rela
)
3404 <= sreloc
->contents
+ sreloc
->size
);
3406 outrel
.r_addend
= relocation
- elf64_x86_64_dtpoff_base (info
);
3408 outrel
.r_addend
= 0;
3409 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3412 sreloc
= htab
->srelgot
;
3414 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3415 + htab
->sgot
->output_offset
+ off
);
3417 if (GOT_TLS_GD_P (tls_type
))
3418 dr_type
= R_X86_64_DTPMOD64
;
3419 else if (GOT_TLS_GDESC_P (tls_type
))
3422 dr_type
= R_X86_64_TPOFF64
;
3424 bfd_put_64 (output_bfd
, 0, htab
->sgot
->contents
+ off
);
3425 outrel
.r_addend
= 0;
3426 if ((dr_type
== R_X86_64_TPOFF64
3427 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
3428 outrel
.r_addend
= relocation
- elf64_x86_64_dtpoff_base (info
);
3429 outrel
.r_info
= ELF64_R_INFO (indx
, dr_type
);
3431 loc
= sreloc
->contents
;
3432 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3433 BFD_ASSERT (loc
+ sizeof (Elf64_External_Rela
)
3434 <= sreloc
->contents
+ sreloc
->size
);
3435 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3437 if (GOT_TLS_GD_P (tls_type
))
3441 BFD_ASSERT (! unresolved_reloc
);
3442 bfd_put_64 (output_bfd
,
3443 relocation
- elf64_x86_64_dtpoff_base (info
),
3444 htab
->sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3448 bfd_put_64 (output_bfd
, 0,
3449 htab
->sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3450 outrel
.r_info
= ELF64_R_INFO (indx
,
3452 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
3453 sreloc
->reloc_count
++;
3454 loc
+= sizeof (Elf64_External_Rela
);
3455 BFD_ASSERT (loc
+ sizeof (Elf64_External_Rela
)
3456 <= sreloc
->contents
+ sreloc
->size
);
3457 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3465 local_got_offsets
[r_symndx
] |= 1;
3468 if (off
>= (bfd_vma
) -2
3469 && ! GOT_TLS_GDESC_P (tls_type
))
3471 if (r_type
== ELF64_R_TYPE (rel
->r_info
))
3473 if (r_type
== R_X86_64_GOTPC32_TLSDESC
3474 || r_type
== R_X86_64_TLSDESC_CALL
)
3475 relocation
= htab
->sgotplt
->output_section
->vma
3476 + htab
->sgotplt
->output_offset
3477 + offplt
+ htab
->sgotplt_jump_table_size
;
3479 relocation
= htab
->sgot
->output_section
->vma
3480 + htab
->sgot
->output_offset
+ off
;
3481 unresolved_reloc
= FALSE
;
3485 bfd_vma roff
= rel
->r_offset
;
3487 if (ELF64_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
3489 /* GD->IE transition.
3490 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3491 .word 0x6666; rex64; call __tls_get_addr@plt
3494 addq foo@gottpoff(%rip), %rax */
3495 memcpy (contents
+ roff
- 4,
3496 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3499 relocation
= (htab
->sgot
->output_section
->vma
3500 + htab
->sgot
->output_offset
+ off
3502 - input_section
->output_section
->vma
3503 - input_section
->output_offset
3505 bfd_put_32 (output_bfd
, relocation
,
3506 contents
+ roff
+ 8);
3507 /* Skip R_X86_64_PLT32. */
3511 else if (ELF64_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
3513 /* GDesc -> IE transition.
3514 It's originally something like:
3515 leaq x@tlsdesc(%rip), %rax
3518 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax
3521 unsigned int val
, type
, type2
;
3523 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3524 type2
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3525 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3527 /* Now modify the instruction as appropriate. To
3528 turn a leaq into a movq in the form we use it, it
3529 suffices to change the second byte from 0x8d to
3531 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3533 bfd_put_32 (output_bfd
,
3534 htab
->sgot
->output_section
->vma
3535 + htab
->sgot
->output_offset
+ off
3537 - input_section
->output_section
->vma
3538 - input_section
->output_offset
3543 else if (ELF64_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
3545 /* GDesc -> IE transition.
3552 unsigned int val
, type
;
3554 type
= bfd_get_8 (input_bfd
, contents
+ roff
);
3555 val
= bfd_get_8 (input_bfd
, contents
+ roff
+ 1);
3556 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3557 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3565 case R_X86_64_TLSLD
:
3566 if (! elf64_x86_64_tls_transition (info
, input_bfd
,
3567 input_section
, contents
,
3568 symtab_hdr
, sym_hashes
,
3569 &r_type
, GOT_UNKNOWN
,
3573 if (r_type
!= R_X86_64_TLSLD
)
3575 /* LD->LE transition:
3576 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
3578 .word 0x6666; .byte 0x66; movl %fs:0, %rax. */
3580 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
3581 memcpy (contents
+ rel
->r_offset
- 3,
3582 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3583 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
3588 if (htab
->sgot
== NULL
)
3591 off
= htab
->tls_ld_got
.offset
;
3596 Elf_Internal_Rela outrel
;
3599 if (htab
->srelgot
== NULL
)
3602 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3603 + htab
->sgot
->output_offset
+ off
);
3605 bfd_put_64 (output_bfd
, 0,
3606 htab
->sgot
->contents
+ off
);
3607 bfd_put_64 (output_bfd
, 0,
3608 htab
->sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3609 outrel
.r_info
= ELF64_R_INFO (0, R_X86_64_DTPMOD64
);
3610 outrel
.r_addend
= 0;
3611 loc
= htab
->srelgot
->contents
;
3612 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3613 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3614 htab
->tls_ld_got
.offset
|= 1;
3616 relocation
= htab
->sgot
->output_section
->vma
3617 + htab
->sgot
->output_offset
+ off
;
3618 unresolved_reloc
= FALSE
;
3621 case R_X86_64_DTPOFF32
:
3622 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
3623 relocation
-= elf64_x86_64_dtpoff_base (info
);
3625 relocation
= elf64_x86_64_tpoff (info
, relocation
);
3628 case R_X86_64_TPOFF32
:
3629 BFD_ASSERT (! info
->shared
);
3630 relocation
= elf64_x86_64_tpoff (info
, relocation
);
3637 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3638 because such sections are not SEC_ALLOC and thus ld.so will
3639 not process them. */
3640 if (unresolved_reloc
3641 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3643 (*_bfd_error_handler
)
3644 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3647 (long) rel
->r_offset
,
3649 h
->root
.root
.string
);
3652 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3653 contents
, rel
->r_offset
,
3654 relocation
, rel
->r_addend
);
3656 if (r
!= bfd_reloc_ok
)
3661 name
= h
->root
.root
.string
;
3664 name
= bfd_elf_string_from_elf_section (input_bfd
,
3665 symtab_hdr
->sh_link
,
3670 name
= bfd_section_name (input_bfd
, sec
);
3673 if (r
== bfd_reloc_overflow
)
3675 if (! ((*info
->callbacks
->reloc_overflow
)
3676 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3677 (bfd_vma
) 0, input_bfd
, input_section
,
3683 (*_bfd_error_handler
)
3684 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3685 input_bfd
, input_section
,
3686 (long) rel
->r_offset
, name
, (int) r
);
3695 /* Finish up dynamic symbol handling. We set the contents of various
3696 dynamic sections here. */
3699 elf64_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
3700 struct bfd_link_info
*info
,
3701 struct elf_link_hash_entry
*h
,
3702 Elf_Internal_Sym
*sym
)
3704 struct elf64_x86_64_link_hash_table
*htab
;
3706 htab
= elf64_x86_64_hash_table (info
);
3708 if (h
->plt
.offset
!= (bfd_vma
) -1)
3712 Elf_Internal_Rela rela
;
3714 asection
*plt
, *gotplt
, *relplt
;
3716 /* When building a static executable, use .iplt, .igot.plt and
3717 .rela.iplt sections for STT_GNU_IFUNC symbols. */
3718 if (htab
->splt
!= NULL
)
3721 gotplt
= htab
->sgotplt
;
3722 relplt
= htab
->srelplt
;
3727 gotplt
= htab
->igotplt
;
3728 relplt
= htab
->irelplt
;
3731 /* This symbol has an entry in the procedure linkage table. Set
3733 if ((h
->dynindx
== -1
3734 && !((h
->forced_local
|| info
->executable
)
3736 && h
->type
== STT_GNU_IFUNC
))
3742 /* Get the index in the procedure linkage table which
3743 corresponds to this symbol. This is the index of this symbol
3744 in all the symbols for which we are making plt entries. The
3745 first entry in the procedure linkage table is reserved.
3747 Get the offset into the .got table of the entry that
3748 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
3749 bytes. The first three are reserved for the dynamic linker.
3751 For static executables, we don't reserve anything. */
3753 if (plt
== htab
->splt
)
3755 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3756 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3760 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
3761 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3764 /* Fill in the entry in the procedure linkage table. */
3765 memcpy (plt
->contents
+ h
->plt
.offset
, elf64_x86_64_plt_entry
,
3768 /* Insert the relocation positions of the plt section. The magic
3769 numbers at the end of the statements are the positions of the
3770 relocations in the plt section. */
3771 /* Put offset for jmp *name@GOTPCREL(%rip), since the
3772 instruction uses 6 bytes, subtract this value. */
3773 bfd_put_32 (output_bfd
,
3774 (gotplt
->output_section
->vma
3775 + gotplt
->output_offset
3777 - plt
->output_section
->vma
3778 - plt
->output_offset
3781 plt
->contents
+ h
->plt
.offset
+ 2);
3783 /* Don't fill PLT entry for static executables. */
3784 if (plt
== htab
->splt
)
3786 /* Put relocation index. */
3787 bfd_put_32 (output_bfd
, plt_index
,
3788 plt
->contents
+ h
->plt
.offset
+ 7);
3789 /* Put offset for jmp .PLT0. */
3790 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
3791 plt
->contents
+ h
->plt
.offset
+ 12);
3794 /* Fill in the entry in the global offset table, initially this
3795 points to the pushq instruction in the PLT which is at offset 6. */
3796 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
3797 + plt
->output_offset
3798 + h
->plt
.offset
+ 6),
3799 gotplt
->contents
+ got_offset
);
3801 /* Fill in the entry in the .rela.plt section. */
3802 rela
.r_offset
= (gotplt
->output_section
->vma
3803 + gotplt
->output_offset
3805 if (h
->dynindx
== -1
3806 || ((info
->executable
3807 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
3809 && h
->type
== STT_GNU_IFUNC
))
3811 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3812 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
3813 rela
.r_info
= ELF64_R_INFO (0, R_X86_64_IRELATIVE
);
3814 rela
.r_addend
= (h
->root
.u
.def
.value
3815 + h
->root
.u
.def
.section
->output_section
->vma
3816 + h
->root
.u
.def
.section
->output_offset
);
3820 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_X86_64_JUMP_SLOT
);
3823 loc
= relplt
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
3824 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3826 if (!h
->def_regular
)
3828 /* Mark the symbol as undefined, rather than as defined in
3829 the .plt section. Leave the value if there were any
3830 relocations where pointer equality matters (this is a clue
3831 for the dynamic linker, to make function pointer
3832 comparisons work between an application and shared
3833 library), otherwise set it to zero. If a function is only
3834 called from a binary, there is no need to slow down
3835 shared libraries because of that. */
3836 sym
->st_shndx
= SHN_UNDEF
;
3837 if (!h
->pointer_equality_needed
)
3842 if (h
->got
.offset
!= (bfd_vma
) -1
3843 && ! GOT_TLS_GD_ANY_P (elf64_x86_64_hash_entry (h
)->tls_type
)
3844 && elf64_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
3846 Elf_Internal_Rela rela
;
3849 /* This symbol has an entry in the global offset table. Set it
3851 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
3854 rela
.r_offset
= (htab
->sgot
->output_section
->vma
3855 + htab
->sgot
->output_offset
3856 + (h
->got
.offset
&~ (bfd_vma
) 1));
3858 /* If this is a static link, or it is a -Bsymbolic link and the
3859 symbol is defined locally or was forced to be local because
3860 of a version file, we just want to emit a RELATIVE reloc.
3861 The entry in the global offset table will already have been
3862 initialized in the relocate_section function. */
3864 && h
->type
== STT_GNU_IFUNC
)
3868 /* Generate R_X86_64_GLOB_DAT. */
3873 if (!h
->pointer_equality_needed
)
3876 /* For non-shared object, we can't use .got.plt, which
3877 contains the real function addres if we need pointer
3878 equality. We load the GOT entry with the PLT entry. */
3879 asection
*plt
= htab
->splt
? htab
->splt
: htab
->iplt
;
3880 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
3881 + plt
->output_offset
3883 htab
->sgot
->contents
+ h
->got
.offset
);
3887 else if (info
->shared
3888 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3890 if (!h
->def_regular
)
3892 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3893 rela
.r_info
= ELF64_R_INFO (0, R_X86_64_RELATIVE
);
3894 rela
.r_addend
= (h
->root
.u
.def
.value
3895 + h
->root
.u
.def
.section
->output_section
->vma
3896 + h
->root
.u
.def
.section
->output_offset
);
3900 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3902 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
3903 htab
->sgot
->contents
+ h
->got
.offset
);
3904 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_X86_64_GLOB_DAT
);
3908 loc
= htab
->srelgot
->contents
;
3909 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3910 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3915 Elf_Internal_Rela rela
;
3918 /* This symbol needs a copy reloc. Set it up. */
3920 if (h
->dynindx
== -1
3921 || (h
->root
.type
!= bfd_link_hash_defined
3922 && h
->root
.type
!= bfd_link_hash_defweak
)
3923 || htab
->srelbss
== NULL
)
3926 rela
.r_offset
= (h
->root
.u
.def
.value
3927 + h
->root
.u
.def
.section
->output_section
->vma
3928 + h
->root
.u
.def
.section
->output_offset
);
3929 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_X86_64_COPY
);
3931 loc
= htab
->srelbss
->contents
;
3932 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3933 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3936 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3937 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3938 || h
== htab
->elf
.hgot
)
3939 sym
->st_shndx
= SHN_ABS
;
3944 /* Used to decide how to sort relocs in an optimal manner for the
3945 dynamic linker, before writing them out. */
3947 static enum elf_reloc_type_class
3948 elf64_x86_64_reloc_type_class (const Elf_Internal_Rela
*rela
)
3950 switch ((int) ELF64_R_TYPE (rela
->r_info
))
3952 case R_X86_64_RELATIVE
:
3953 return reloc_class_relative
;
3954 case R_X86_64_JUMP_SLOT
:
3955 return reloc_class_plt
;
3957 return reloc_class_copy
;
3959 return reloc_class_normal
;
3963 /* Finish up the dynamic sections. */
3966 elf64_x86_64_finish_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
3968 struct elf64_x86_64_link_hash_table
*htab
;
3972 htab
= elf64_x86_64_hash_table (info
);
3973 dynobj
= htab
->elf
.dynobj
;
3974 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3976 if (htab
->elf
.dynamic_sections_created
)
3978 Elf64_External_Dyn
*dyncon
, *dynconend
;
3980 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
3983 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
3984 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3985 for (; dyncon
< dynconend
; dyncon
++)
3987 Elf_Internal_Dyn dyn
;
3990 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3999 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4003 dyn
.d_un
.d_ptr
= htab
->srelplt
->output_section
->vma
;
4007 s
= htab
->srelplt
->output_section
;
4008 dyn
.d_un
.d_val
= s
->size
;
4012 /* The procedure linkage table relocs (DT_JMPREL) should
4013 not be included in the overall relocs (DT_RELA).
4014 Therefore, we override the DT_RELASZ entry here to
4015 make it not include the JMPREL relocs. Since the
4016 linker script arranges for .rela.plt to follow all
4017 other relocation sections, we don't have to worry
4018 about changing the DT_RELA entry. */
4019 if (htab
->srelplt
!= NULL
)
4021 s
= htab
->srelplt
->output_section
;
4022 dyn
.d_un
.d_val
-= s
->size
;
4026 case DT_TLSDESC_PLT
:
4028 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4029 + htab
->tlsdesc_plt
;
4032 case DT_TLSDESC_GOT
:
4034 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4035 + htab
->tlsdesc_got
;
4039 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4042 /* Fill in the special first entry in the procedure linkage table. */
4043 if (htab
->splt
&& htab
->splt
->size
> 0)
4045 /* Fill in the first entry in the procedure linkage table. */
4046 memcpy (htab
->splt
->contents
, elf64_x86_64_plt0_entry
,
4048 /* Add offset for pushq GOT+8(%rip), since the instruction
4049 uses 6 bytes subtract this value. */
4050 bfd_put_32 (output_bfd
,
4051 (htab
->sgotplt
->output_section
->vma
4052 + htab
->sgotplt
->output_offset
4054 - htab
->splt
->output_section
->vma
4055 - htab
->splt
->output_offset
4057 htab
->splt
->contents
+ 2);
4058 /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to
4059 the end of the instruction. */
4060 bfd_put_32 (output_bfd
,
4061 (htab
->sgotplt
->output_section
->vma
4062 + htab
->sgotplt
->output_offset
4064 - htab
->splt
->output_section
->vma
4065 - htab
->splt
->output_offset
4067 htab
->splt
->contents
+ 8);
4069 elf_section_data (htab
->splt
->output_section
)->this_hdr
.sh_entsize
=
4072 if (htab
->tlsdesc_plt
)
4074 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4075 htab
->sgot
->contents
+ htab
->tlsdesc_got
);
4077 memcpy (htab
->splt
->contents
+ htab
->tlsdesc_plt
,
4078 elf64_x86_64_plt0_entry
,
4081 /* Add offset for pushq GOT+8(%rip), since the
4082 instruction uses 6 bytes subtract this value. */
4083 bfd_put_32 (output_bfd
,
4084 (htab
->sgotplt
->output_section
->vma
4085 + htab
->sgotplt
->output_offset
4087 - htab
->splt
->output_section
->vma
4088 - htab
->splt
->output_offset
4091 htab
->splt
->contents
+ htab
->tlsdesc_plt
+ 2);
4092 /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for
4093 htab->tlsdesc_got. The 12 is the offset to the end of
4095 bfd_put_32 (output_bfd
,
4096 (htab
->sgot
->output_section
->vma
4097 + htab
->sgot
->output_offset
4099 - htab
->splt
->output_section
->vma
4100 - htab
->splt
->output_offset
4103 htab
->splt
->contents
+ htab
->tlsdesc_plt
+ 8);
4110 /* Fill in the first three entries in the global offset table. */
4111 if (htab
->sgotplt
->size
> 0)
4113 /* Set the first entry in the global offset table to the address of
4114 the dynamic section. */
4116 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
);
4118 bfd_put_64 (output_bfd
,
4119 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
4120 htab
->sgotplt
->contents
);
4121 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4122 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
+ GOT_ENTRY_SIZE
);
4123 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
4126 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
=
4130 if (htab
->sgot
&& htab
->sgot
->size
> 0)
4131 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
4137 /* Return address for Ith PLT stub in section PLT, for relocation REL
4138 or (bfd_vma) -1 if it should not be included. */
4141 elf64_x86_64_plt_sym_val (bfd_vma i
, const asection
*plt
,
4142 const arelent
*rel ATTRIBUTE_UNUSED
)
4144 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4147 /* Handle an x86-64 specific section when reading an object file. This
4148 is called when elfcode.h finds a section with an unknown type. */
4151 elf64_x86_64_section_from_shdr (bfd
*abfd
,
4152 Elf_Internal_Shdr
*hdr
,
4156 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4159 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4165 /* Hook called by the linker routine which adds symbols from an object
4166 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4170 elf64_x86_64_add_symbol_hook (bfd
*abfd
,
4171 struct bfd_link_info
*info
,
4172 Elf_Internal_Sym
*sym
,
4173 const char **namep ATTRIBUTE_UNUSED
,
4174 flagword
*flagsp ATTRIBUTE_UNUSED
,
4180 switch (sym
->st_shndx
)
4182 case SHN_X86_64_LCOMMON
:
4183 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
4186 lcomm
= bfd_make_section_with_flags (abfd
,
4190 | SEC_LINKER_CREATED
));
4193 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
4196 *valp
= sym
->st_size
;
4200 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
4201 elf_tdata (info
->output_bfd
)->has_ifunc_symbols
= TRUE
;
4207 /* Given a BFD section, try to locate the corresponding ELF section
4211 elf64_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
4212 asection
*sec
, int *index
)
4214 if (sec
== &_bfd_elf_large_com_section
)
4216 *index
= SHN_X86_64_LCOMMON
;
4222 /* Process a symbol. */
4225 elf64_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
4228 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
4230 switch (elfsym
->internal_elf_sym
.st_shndx
)
4232 case SHN_X86_64_LCOMMON
:
4233 asym
->section
= &_bfd_elf_large_com_section
;
4234 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
4235 /* Common symbol doesn't set BSF_GLOBAL. */
4236 asym
->flags
&= ~BSF_GLOBAL
;
4242 elf64_x86_64_common_definition (Elf_Internal_Sym
*sym
)
4244 return (sym
->st_shndx
== SHN_COMMON
4245 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
4249 elf64_x86_64_common_section_index (asection
*sec
)
4251 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
4254 return SHN_X86_64_LCOMMON
;
4258 elf64_x86_64_common_section (asection
*sec
)
4260 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
4261 return bfd_com_section_ptr
;
4263 return &_bfd_elf_large_com_section
;
4267 elf64_x86_64_merge_symbol (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4268 struct elf_link_hash_entry
**sym_hash ATTRIBUTE_UNUSED
,
4269 struct elf_link_hash_entry
*h
,
4270 Elf_Internal_Sym
*sym
,
4272 bfd_vma
*pvalue ATTRIBUTE_UNUSED
,
4273 unsigned int *pold_alignment ATTRIBUTE_UNUSED
,
4274 bfd_boolean
*skip ATTRIBUTE_UNUSED
,
4275 bfd_boolean
*override ATTRIBUTE_UNUSED
,
4276 bfd_boolean
*type_change_ok ATTRIBUTE_UNUSED
,
4277 bfd_boolean
*size_change_ok ATTRIBUTE_UNUSED
,
4278 bfd_boolean
*newdef ATTRIBUTE_UNUSED
,
4279 bfd_boolean
*newdyn
,
4280 bfd_boolean
*newdyncommon ATTRIBUTE_UNUSED
,
4281 bfd_boolean
*newweak ATTRIBUTE_UNUSED
,
4282 bfd
*abfd ATTRIBUTE_UNUSED
,
4284 bfd_boolean
*olddef ATTRIBUTE_UNUSED
,
4285 bfd_boolean
*olddyn
,
4286 bfd_boolean
*olddyncommon ATTRIBUTE_UNUSED
,
4287 bfd_boolean
*oldweak ATTRIBUTE_UNUSED
,
4291 /* A normal common symbol and a large common symbol result in a
4292 normal common symbol. We turn the large common symbol into a
4295 && h
->root
.type
== bfd_link_hash_common
4297 && bfd_is_com_section (*sec
)
4300 if (sym
->st_shndx
== SHN_COMMON
4301 && (elf_section_flags (*oldsec
) & SHF_X86_64_LARGE
) != 0)
4303 h
->root
.u
.c
.p
->section
4304 = bfd_make_section_old_way (oldbfd
, "COMMON");
4305 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
4307 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
4308 && (elf_section_flags (*oldsec
) & SHF_X86_64_LARGE
) == 0)
4309 *psec
= *sec
= bfd_com_section_ptr
;
4316 elf64_x86_64_additional_program_headers (bfd
*abfd
,
4317 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
4322 /* Check to see if we need a large readonly segment. */
4323 s
= bfd_get_section_by_name (abfd
, ".lrodata");
4324 if (s
&& (s
->flags
& SEC_LOAD
))
4327 /* Check to see if we need a large data segment. Since .lbss sections
4328 is placed right after the .bss section, there should be no need for
4329 a large data segment just because of .lbss. */
4330 s
= bfd_get_section_by_name (abfd
, ".ldata");
4331 if (s
&& (s
->flags
& SEC_LOAD
))
4337 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4340 elf64_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
4342 if (h
->plt
.offset
!= (bfd_vma
) -1
4344 && !h
->pointer_equality_needed
)
4347 return _bfd_elf_hash_symbol (h
);
4350 static const struct bfd_elf_special_section
4351 elf64_x86_64_special_sections
[]=
4353 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
4354 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
4355 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
4356 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
4357 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
4358 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
4359 { NULL
, 0, 0, 0, 0 }
4362 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
4363 #define TARGET_LITTLE_NAME "elf64-x86-64"
4364 #define ELF_ARCH bfd_arch_i386
4365 #define ELF_MACHINE_CODE EM_X86_64
4366 #define ELF_MAXPAGESIZE 0x200000
4367 #define ELF_MINPAGESIZE 0x1000
4368 #define ELF_COMMONPAGESIZE 0x1000
4370 #define elf_backend_can_gc_sections 1
4371 #define elf_backend_can_refcount 1
4372 #define elf_backend_want_got_plt 1
4373 #define elf_backend_plt_readonly 1
4374 #define elf_backend_want_plt_sym 0
4375 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
4376 #define elf_backend_rela_normal 1
4378 #define elf_info_to_howto elf64_x86_64_info_to_howto
4380 #define bfd_elf64_bfd_link_hash_table_create \
4381 elf64_x86_64_link_hash_table_create
4382 #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup
4383 #define bfd_elf64_bfd_reloc_name_lookup \
4384 elf64_x86_64_reloc_name_lookup
4386 #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol
4387 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4388 #define elf_backend_check_relocs elf64_x86_64_check_relocs
4389 #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol
4390 #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections
4391 #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections
4392 #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol
4393 #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook
4394 #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook
4395 #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus
4396 #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo
4397 #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class
4398 #define elf_backend_relocate_section elf64_x86_64_relocate_section
4399 #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections
4400 #define elf_backend_always_size_sections elf64_x86_64_always_size_sections
4401 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4402 #define elf_backend_plt_sym_val elf64_x86_64_plt_sym_val
4403 #define elf_backend_object_p elf64_x86_64_elf_object_p
4404 #define bfd_elf64_mkobject elf64_x86_64_mkobject
4406 #define elf_backend_section_from_shdr \
4407 elf64_x86_64_section_from_shdr
4409 #define elf_backend_section_from_bfd_section \
4410 elf64_x86_64_elf_section_from_bfd_section
4411 #define elf_backend_add_symbol_hook \
4412 elf64_x86_64_add_symbol_hook
4413 #define elf_backend_symbol_processing \
4414 elf64_x86_64_symbol_processing
4415 #define elf_backend_common_section_index \
4416 elf64_x86_64_common_section_index
4417 #define elf_backend_common_section \
4418 elf64_x86_64_common_section
4419 #define elf_backend_common_definition \
4420 elf64_x86_64_common_definition
4421 #define elf_backend_merge_symbol \
4422 elf64_x86_64_merge_symbol
4423 #define elf_backend_special_sections \
4424 elf64_x86_64_special_sections
4425 #define elf_backend_additional_program_headers \
4426 elf64_x86_64_additional_program_headers
4427 #define elf_backend_hash_symbol \
4428 elf64_x86_64_hash_symbol
4430 #undef elf_backend_post_process_headers
4431 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4433 #include "elf64-target.h"
4435 /* FreeBSD support. */
4437 #undef TARGET_LITTLE_SYM
4438 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
4439 #undef TARGET_LITTLE_NAME
4440 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
4443 #define ELF_OSABI ELFOSABI_FREEBSD
4446 #define elf64_bed elf64_x86_64_fbsd_bed
4448 #include "elf64-target.h"