1 /* X86-64 specific support for ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
4 Free Software Foundation, Inc.
5 Contributed by Jan Hubicka <jh@suse.cz>.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
30 #include "bfd_stdint.h"
34 #include "libiberty.h"
36 #include "elf/x86-64.h"
43 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
44 #define MINUS_ONE (~ (bfd_vma) 0)
46 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
47 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
48 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
49 since they are the same. */
51 #define ABI_64_P(abfd) \
52 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
54 /* The relocation "howto" table. Order of fields:
55 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
56 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
57 static reloc_howto_type x86_64_elf_howto_table
[] =
59 HOWTO(R_X86_64_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
60 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
62 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
63 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
65 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
66 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
68 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
69 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
71 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
72 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
74 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
75 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
77 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
78 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
80 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
81 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
83 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
86 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
87 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
89 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
90 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
92 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
93 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
95 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
97 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
99 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
100 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
101 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
102 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
103 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
106 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
107 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
109 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
110 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
112 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
113 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
115 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
116 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
118 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
119 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
121 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
122 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
124 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
125 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
127 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
130 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
131 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
132 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
133 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
134 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
135 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
136 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
137 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
139 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
140 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
142 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
143 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
144 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
145 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
146 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
148 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
149 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
153 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
154 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
155 "R_X86_64_GOTPC32_TLSDESC",
156 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
157 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
158 complain_overflow_dont
, bfd_elf_generic_reloc
,
159 "R_X86_64_TLSDESC_CALL",
161 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
162 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
164 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
165 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
166 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
168 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
169 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
172 /* We have a gap in the reloc numbers here.
173 R_X86_64_standard counts the number up to this point, and
174 R_X86_64_vt_offset is the value to subtract from a reloc type of
175 R_X86_64_GNU_VT* to form an index into this table. */
176 #define R_X86_64_standard (R_X86_64_IRELATIVE + 1)
177 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
179 /* GNU extension to record C++ vtable hierarchy. */
180 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
181 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
183 /* GNU extension to record C++ vtable member usage. */
184 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
185 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
188 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
189 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
190 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
194 #define IS_X86_64_PCREL_TYPE(TYPE) \
195 ( ((TYPE) == R_X86_64_PC8) \
196 || ((TYPE) == R_X86_64_PC16) \
197 || ((TYPE) == R_X86_64_PC32) \
198 || ((TYPE) == R_X86_64_PC64))
200 /* Map BFD relocs to the x86_64 elf relocs. */
203 bfd_reloc_code_real_type bfd_reloc_val
;
204 unsigned char elf_reloc_val
;
207 static const struct elf_reloc_map x86_64_reloc_map
[] =
209 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
210 { BFD_RELOC_64
, R_X86_64_64
, },
211 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
212 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
213 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
214 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
215 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
216 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
217 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
218 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
219 { BFD_RELOC_32
, R_X86_64_32
, },
220 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
221 { BFD_RELOC_16
, R_X86_64_16
, },
222 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
223 { BFD_RELOC_8
, R_X86_64_8
, },
224 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
225 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
226 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
227 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
228 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
229 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
230 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
231 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
232 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
233 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
234 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
235 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
236 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
237 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
238 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
239 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
240 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
241 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
242 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
243 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
244 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
245 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
246 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
249 static reloc_howto_type
*
250 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
254 if (r_type
== (unsigned int) R_X86_64_32
)
259 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
261 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
262 || r_type
>= (unsigned int) R_X86_64_max
)
264 if (r_type
>= (unsigned int) R_X86_64_standard
)
266 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
268 r_type
= R_X86_64_NONE
;
273 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
274 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
275 return &x86_64_elf_howto_table
[i
];
278 /* Given a BFD reloc type, return a HOWTO structure. */
279 static reloc_howto_type
*
280 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
281 bfd_reloc_code_real_type code
)
285 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
288 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
289 return elf_x86_64_rtype_to_howto (abfd
,
290 x86_64_reloc_map
[i
].elf_reloc_val
);
295 static reloc_howto_type
*
296 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
301 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
303 /* Get x32 R_X86_64_32. */
304 reloc_howto_type
*reloc
305 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
306 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
310 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
311 if (x86_64_elf_howto_table
[i
].name
!= NULL
312 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
313 return &x86_64_elf_howto_table
[i
];
318 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
321 elf_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
322 Elf_Internal_Rela
*dst
)
326 r_type
= ELF32_R_TYPE (dst
->r_info
);
327 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
328 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
331 /* Support for core dump NOTE sections. */
333 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
338 switch (note
->descsz
)
343 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
345 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
348 elf_tdata (abfd
)->core_lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
356 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
358 elf_tdata (abfd
)->core_signal
359 = bfd_get_16 (abfd
, note
->descdata
+ 12);
362 elf_tdata (abfd
)->core_lwpid
363 = bfd_get_32 (abfd
, note
->descdata
+ 32);
372 /* Make a ".reg/999" section. */
373 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
374 size
, note
->descpos
+ offset
);
378 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
380 switch (note
->descsz
)
385 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
386 elf_tdata (abfd
)->core_pid
387 = bfd_get_32 (abfd
, note
->descdata
+ 12);
388 elf_tdata (abfd
)->core_program
389 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
390 elf_tdata (abfd
)->core_command
391 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
394 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
395 elf_tdata (abfd
)->core_pid
396 = bfd_get_32 (abfd
, note
->descdata
+ 24);
397 elf_tdata (abfd
)->core_program
398 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
399 elf_tdata (abfd
)->core_command
400 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
403 /* Note that for some reason, a spurious space is tacked
404 onto the end of the args in some (at least one anyway)
405 implementations, so strip it off if it exists. */
408 char *command
= elf_tdata (abfd
)->core_command
;
409 int n
= strlen (command
);
411 if (0 < n
&& command
[n
- 1] == ' ')
412 command
[n
- 1] = '\0';
420 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
423 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
425 const char *fname
, *psargs
;
436 va_start (ap
, note_type
);
437 fname
= va_arg (ap
, const char *);
438 psargs
= va_arg (ap
, const char *);
441 if (bed
->s
->elfclass
== ELFCLASS32
)
444 memset (&data
, 0, sizeof (data
));
445 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
446 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
447 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
448 &data
, sizeof (data
));
453 memset (&data
, 0, sizeof (data
));
454 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
455 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
456 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
457 &data
, sizeof (data
));
462 va_start (ap
, note_type
);
463 pid
= va_arg (ap
, long);
464 cursig
= va_arg (ap
, int);
465 gregs
= va_arg (ap
, const void *);
468 if (bed
->s
->elfclass
== ELFCLASS32
)
470 if (bed
->elf_machine_code
== EM_X86_64
)
472 prstatusx32_t prstat
;
473 memset (&prstat
, 0, sizeof (prstat
));
475 prstat
.pr_cursig
= cursig
;
476 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
477 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
478 &prstat
, sizeof (prstat
));
483 memset (&prstat
, 0, sizeof (prstat
));
485 prstat
.pr_cursig
= cursig
;
486 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
487 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
488 &prstat
, sizeof (prstat
));
494 memset (&prstat
, 0, sizeof (prstat
));
496 prstat
.pr_cursig
= cursig
;
497 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
498 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
499 &prstat
, sizeof (prstat
));
506 /* Functions for the x86-64 ELF linker. */
508 /* The name of the dynamic interpreter. This is put in the .interp
511 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
512 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
514 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
515 copying dynamic variables from a shared lib into an app's dynbss
516 section, and instead use a dynamic relocation to point into the
518 #define ELIMINATE_COPY_RELOCS 1
520 /* The size in bytes of an entry in the global offset table. */
522 #define GOT_ENTRY_SIZE 8
524 /* The size in bytes of an entry in the procedure linkage table. */
526 #define PLT_ENTRY_SIZE 16
528 /* The first entry in a procedure linkage table looks like this. See the
529 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
531 static const bfd_byte elf_x86_64_plt0_entry
[PLT_ENTRY_SIZE
] =
533 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
534 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
535 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
538 /* Subsequent entries in a procedure linkage table look like this. */
540 static const bfd_byte elf_x86_64_plt_entry
[PLT_ENTRY_SIZE
] =
542 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
543 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
544 0x68, /* pushq immediate */
545 0, 0, 0, 0, /* replaced with index into relocation table. */
546 0xe9, /* jmp relative */
547 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
550 /* .eh_frame covering the .plt section. */
552 static const bfd_byte elf_x86_64_eh_frame_plt
[] =
554 #define PLT_CIE_LENGTH 20
555 #define PLT_FDE_LENGTH 36
556 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
557 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
558 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
559 0, 0, 0, 0, /* CIE ID */
561 'z', 'R', 0, /* Augmentation string */
562 1, /* Code alignment factor */
563 0x78, /* Data alignment factor */
564 16, /* Return address column */
565 1, /* Augmentation size */
566 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
567 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
568 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
569 DW_CFA_nop
, DW_CFA_nop
,
571 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
572 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
573 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
574 0, 0, 0, 0, /* .plt size goes here */
575 0, /* Augmentation size */
576 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
577 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
578 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
579 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
580 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
581 11, /* Block length */
582 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
583 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
584 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
585 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
586 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
589 /* Architecture-specific backend data for x86-64. */
591 struct elf_x86_64_backend_data
593 /* Templates for the initial PLT entry and for subsequent entries. */
594 const bfd_byte
*plt0_entry
;
595 const bfd_byte
*plt_entry
;
596 unsigned int plt_entry_size
; /* Size of each PLT entry. */
598 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
599 unsigned int plt0_got1_offset
;
600 unsigned int plt0_got2_offset
;
602 /* Offset of the end of the PC-relative instruction containing
604 unsigned int plt0_got2_insn_end
;
606 /* Offsets into plt_entry that are to be replaced with... */
607 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
608 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
609 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
611 /* Length of the PC-relative instruction containing plt_got_offset. */
612 unsigned int plt_got_insn_size
;
614 /* Offset of the end of the PC-relative jump to plt0_entry. */
615 unsigned int plt_plt_insn_end
;
617 /* Offset into plt_entry where the initial value of the GOT entry points. */
618 unsigned int plt_lazy_offset
;
620 /* .eh_frame covering the .plt section. */
621 const bfd_byte
*eh_frame_plt
;
622 unsigned int eh_frame_plt_size
;
625 #define get_elf_x86_64_backend_data(abfd) \
626 ((const struct elf_x86_64_backend_data *) \
627 get_elf_backend_data (abfd)->arch_data)
629 #define GET_PLT_ENTRY_SIZE(abfd) \
630 get_elf_x86_64_backend_data (abfd)->plt_entry_size
632 /* These are the standard parameters. */
633 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
635 elf_x86_64_plt0_entry
, /* plt0_entry */
636 elf_x86_64_plt_entry
, /* plt_entry */
637 sizeof (elf_x86_64_plt_entry
), /* plt_entry_size */
638 2, /* plt0_got1_offset */
639 8, /* plt0_got2_offset */
640 12, /* plt0_got2_insn_end */
641 2, /* plt_got_offset */
642 7, /* plt_reloc_offset */
643 12, /* plt_plt_offset */
644 6, /* plt_got_insn_size */
645 PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
646 6, /* plt_lazy_offset */
647 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
648 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
651 #define elf_backend_arch_data &elf_x86_64_arch_bed
653 /* x86-64 ELF linker hash entry. */
655 struct elf_x86_64_link_hash_entry
657 struct elf_link_hash_entry elf
;
659 /* Track dynamic relocs copied for this symbol. */
660 struct elf_dyn_relocs
*dyn_relocs
;
662 #define GOT_UNKNOWN 0
666 #define GOT_TLS_GDESC 4
667 #define GOT_TLS_GD_BOTH_P(type) \
668 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
669 #define GOT_TLS_GD_P(type) \
670 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
671 #define GOT_TLS_GDESC_P(type) \
672 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
673 #define GOT_TLS_GD_ANY_P(type) \
674 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
675 unsigned char tls_type
;
677 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
678 starting at the end of the jump table. */
682 #define elf_x86_64_hash_entry(ent) \
683 ((struct elf_x86_64_link_hash_entry *)(ent))
685 struct elf_x86_64_obj_tdata
687 struct elf_obj_tdata root
;
689 /* tls_type for each local got entry. */
690 char *local_got_tls_type
;
692 /* GOTPLT entries for TLS descriptors. */
693 bfd_vma
*local_tlsdesc_gotent
;
696 #define elf_x86_64_tdata(abfd) \
697 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
699 #define elf_x86_64_local_got_tls_type(abfd) \
700 (elf_x86_64_tdata (abfd)->local_got_tls_type)
702 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
703 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
705 #define is_x86_64_elf(bfd) \
706 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
707 && elf_tdata (bfd) != NULL \
708 && elf_object_id (bfd) == X86_64_ELF_DATA)
711 elf_x86_64_mkobject (bfd
*abfd
)
713 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_x86_64_obj_tdata
),
717 /* x86-64 ELF linker hash table. */
719 struct elf_x86_64_link_hash_table
721 struct elf_link_hash_table elf
;
723 /* Short-cuts to get to dynamic linker sections. */
726 asection
*plt_eh_frame
;
730 bfd_signed_vma refcount
;
734 /* The amount of space used by the jump slots in the GOT. */
735 bfd_vma sgotplt_jump_table_size
;
737 /* Small local sym cache. */
738 struct sym_cache sym_cache
;
740 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
741 bfd_vma (*r_sym
) (bfd_vma
);
742 unsigned int pointer_r_type
;
743 const char *dynamic_interpreter
;
744 int dynamic_interpreter_size
;
746 /* _TLS_MODULE_BASE_ symbol. */
747 struct bfd_link_hash_entry
*tls_module_base
;
749 /* Used by local STT_GNU_IFUNC symbols. */
750 htab_t loc_hash_table
;
751 void * loc_hash_memory
;
753 /* The offset into splt of the PLT entry for the TLS descriptor
754 resolver. Special values are 0, if not necessary (or not found
755 to be necessary yet), and -1 if needed but not determined
758 /* The offset into sgot of the GOT entry used by the PLT entry
762 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
763 bfd_vma next_jump_slot_index
;
764 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
765 bfd_vma next_irelative_index
;
768 /* Get the x86-64 ELF linker hash table from a link_info structure. */
770 #define elf_x86_64_hash_table(p) \
771 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
772 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
774 #define elf_x86_64_compute_jump_table_size(htab) \
775 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
777 /* Create an entry in an x86-64 ELF linker hash table. */
779 static struct bfd_hash_entry
*
780 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
781 struct bfd_hash_table
*table
,
784 /* Allocate the structure if it has not already been allocated by a
788 entry
= (struct bfd_hash_entry
*)
789 bfd_hash_allocate (table
,
790 sizeof (struct elf_x86_64_link_hash_entry
));
795 /* Call the allocation method of the superclass. */
796 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
799 struct elf_x86_64_link_hash_entry
*eh
;
801 eh
= (struct elf_x86_64_link_hash_entry
*) entry
;
802 eh
->dyn_relocs
= NULL
;
803 eh
->tls_type
= GOT_UNKNOWN
;
804 eh
->tlsdesc_got
= (bfd_vma
) -1;
810 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
811 for local symbol so that we can handle local STT_GNU_IFUNC symbols
812 as global symbol. We reuse indx and dynstr_index for local symbol
813 hash since they aren't used by global symbols in this backend. */
816 elf_x86_64_local_htab_hash (const void *ptr
)
818 struct elf_link_hash_entry
*h
819 = (struct elf_link_hash_entry
*) ptr
;
820 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
823 /* Compare local hash entries. */
826 elf_x86_64_local_htab_eq (const void *ptr1
, const void *ptr2
)
828 struct elf_link_hash_entry
*h1
829 = (struct elf_link_hash_entry
*) ptr1
;
830 struct elf_link_hash_entry
*h2
831 = (struct elf_link_hash_entry
*) ptr2
;
833 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
836 /* Find and/or create a hash entry for local symbol. */
838 static struct elf_link_hash_entry
*
839 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table
*htab
,
840 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
843 struct elf_x86_64_link_hash_entry e
, *ret
;
844 asection
*sec
= abfd
->sections
;
845 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
846 htab
->r_sym (rel
->r_info
));
849 e
.elf
.indx
= sec
->id
;
850 e
.elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
851 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
852 create
? INSERT
: NO_INSERT
);
859 ret
= (struct elf_x86_64_link_hash_entry
*) *slot
;
863 ret
= (struct elf_x86_64_link_hash_entry
*)
864 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
865 sizeof (struct elf_x86_64_link_hash_entry
));
868 memset (ret
, 0, sizeof (*ret
));
869 ret
->elf
.indx
= sec
->id
;
870 ret
->elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
871 ret
->elf
.dynindx
= -1;
877 /* Create an X86-64 ELF linker hash table. */
879 static struct bfd_link_hash_table
*
880 elf_x86_64_link_hash_table_create (bfd
*abfd
)
882 struct elf_x86_64_link_hash_table
*ret
;
883 bfd_size_type amt
= sizeof (struct elf_x86_64_link_hash_table
);
885 ret
= (struct elf_x86_64_link_hash_table
*) bfd_malloc (amt
);
889 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
890 elf_x86_64_link_hash_newfunc
,
891 sizeof (struct elf_x86_64_link_hash_entry
),
900 ret
->plt_eh_frame
= NULL
;
901 ret
->sym_cache
.abfd
= NULL
;
902 ret
->tlsdesc_plt
= 0;
903 ret
->tlsdesc_got
= 0;
904 ret
->tls_ld_got
.refcount
= 0;
905 ret
->sgotplt_jump_table_size
= 0;
906 ret
->tls_module_base
= NULL
;
907 ret
->next_jump_slot_index
= 0;
908 ret
->next_irelative_index
= 0;
912 ret
->r_info
= elf64_r_info
;
913 ret
->r_sym
= elf64_r_sym
;
914 ret
->pointer_r_type
= R_X86_64_64
;
915 ret
->dynamic_interpreter
= ELF64_DYNAMIC_INTERPRETER
;
916 ret
->dynamic_interpreter_size
= sizeof ELF64_DYNAMIC_INTERPRETER
;
920 ret
->r_info
= elf32_r_info
;
921 ret
->r_sym
= elf32_r_sym
;
922 ret
->pointer_r_type
= R_X86_64_32
;
923 ret
->dynamic_interpreter
= ELF32_DYNAMIC_INTERPRETER
;
924 ret
->dynamic_interpreter_size
= sizeof ELF32_DYNAMIC_INTERPRETER
;
927 ret
->loc_hash_table
= htab_try_create (1024,
928 elf_x86_64_local_htab_hash
,
929 elf_x86_64_local_htab_eq
,
931 ret
->loc_hash_memory
= objalloc_create ();
932 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
938 return &ret
->elf
.root
;
941 /* Destroy an X86-64 ELF linker hash table. */
944 elf_x86_64_link_hash_table_free (struct bfd_link_hash_table
*hash
)
946 struct elf_x86_64_link_hash_table
*htab
947 = (struct elf_x86_64_link_hash_table
*) hash
;
949 if (htab
->loc_hash_table
)
950 htab_delete (htab
->loc_hash_table
);
951 if (htab
->loc_hash_memory
)
952 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
953 _bfd_generic_link_hash_table_free (hash
);
956 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
957 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
961 elf_x86_64_create_dynamic_sections (bfd
*dynobj
,
962 struct bfd_link_info
*info
)
964 struct elf_x86_64_link_hash_table
*htab
;
966 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
969 htab
= elf_x86_64_hash_table (info
);
973 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
975 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
978 || (!info
->shared
&& !htab
->srelbss
))
981 if (!info
->no_ld_generated_unwind_info
982 && htab
->plt_eh_frame
== NULL
983 && htab
->elf
.splt
!= NULL
)
985 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
986 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
987 | SEC_LINKER_CREATED
);
989 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
990 if (htab
->plt_eh_frame
== NULL
991 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 3))
997 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1000 elf_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
1001 struct elf_link_hash_entry
*dir
,
1002 struct elf_link_hash_entry
*ind
)
1004 struct elf_x86_64_link_hash_entry
*edir
, *eind
;
1006 edir
= (struct elf_x86_64_link_hash_entry
*) dir
;
1007 eind
= (struct elf_x86_64_link_hash_entry
*) ind
;
1009 if (eind
->dyn_relocs
!= NULL
)
1011 if (edir
->dyn_relocs
!= NULL
)
1013 struct elf_dyn_relocs
**pp
;
1014 struct elf_dyn_relocs
*p
;
1016 /* Add reloc counts against the indirect sym to the direct sym
1017 list. Merge any entries against the same section. */
1018 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1020 struct elf_dyn_relocs
*q
;
1022 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1023 if (q
->sec
== p
->sec
)
1025 q
->pc_count
+= p
->pc_count
;
1026 q
->count
+= p
->count
;
1033 *pp
= edir
->dyn_relocs
;
1036 edir
->dyn_relocs
= eind
->dyn_relocs
;
1037 eind
->dyn_relocs
= NULL
;
1040 if (ind
->root
.type
== bfd_link_hash_indirect
1041 && dir
->got
.refcount
<= 0)
1043 edir
->tls_type
= eind
->tls_type
;
1044 eind
->tls_type
= GOT_UNKNOWN
;
1047 if (ELIMINATE_COPY_RELOCS
1048 && ind
->root
.type
!= bfd_link_hash_indirect
1049 && dir
->dynamic_adjusted
)
1051 /* If called to transfer flags for a weakdef during processing
1052 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1053 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1054 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1055 dir
->ref_regular
|= ind
->ref_regular
;
1056 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1057 dir
->needs_plt
|= ind
->needs_plt
;
1058 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1061 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1065 elf64_x86_64_elf_object_p (bfd
*abfd
)
1067 /* Set the right machine number for an x86-64 elf64 file. */
1068 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1073 elf32_x86_64_elf_object_p (bfd
*abfd
)
1075 /* Set the right machine number for an x86-64 elf32 file. */
1076 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1080 /* Return TRUE if the TLS access code sequence support transition
1084 elf_x86_64_check_tls_transition (bfd
*abfd
,
1085 struct bfd_link_info
*info
,
1088 Elf_Internal_Shdr
*symtab_hdr
,
1089 struct elf_link_hash_entry
**sym_hashes
,
1090 unsigned int r_type
,
1091 const Elf_Internal_Rela
*rel
,
1092 const Elf_Internal_Rela
*relend
)
1095 unsigned long r_symndx
;
1096 struct elf_link_hash_entry
*h
;
1098 struct elf_x86_64_link_hash_table
*htab
;
1100 /* Get the section contents. */
1101 if (contents
== NULL
)
1103 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1104 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1107 /* FIXME: How to better handle error condition? */
1108 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1111 /* Cache the section contents for elf_link_input_bfd. */
1112 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1116 htab
= elf_x86_64_hash_table (info
);
1117 offset
= rel
->r_offset
;
1120 case R_X86_64_TLSGD
:
1121 case R_X86_64_TLSLD
:
1122 if ((rel
+ 1) >= relend
)
1125 if (r_type
== R_X86_64_TLSGD
)
1127 /* Check transition from GD access model. For 64bit, only
1128 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1129 .word 0x6666; rex64; call __tls_get_addr
1130 can transit to different access model. For 32bit, only
1131 leaq foo@tlsgd(%rip), %rdi
1132 .word 0x6666; rex64; call __tls_get_addr
1133 can transit to different access model. */
1135 static const unsigned char call
[] = { 0x66, 0x66, 0x48, 0xe8 };
1136 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1138 if ((offset
+ 12) > sec
->size
1139 || memcmp (contents
+ offset
+ 4, call
, 4) != 0)
1142 if (ABI_64_P (abfd
))
1145 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1151 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1157 /* Check transition from LD access model. Only
1158 leaq foo@tlsld(%rip), %rdi;
1160 can transit to different access model. */
1162 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1164 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1167 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0
1168 || 0xe8 != *(contents
+ offset
+ 4))
1172 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1173 if (r_symndx
< symtab_hdr
->sh_info
)
1176 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1177 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1178 may be versioned. */
1180 && h
->root
.root
.string
!= NULL
1181 && (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1182 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
)
1183 && (strncmp (h
->root
.root
.string
,
1184 "__tls_get_addr", 14) == 0));
1186 case R_X86_64_GOTTPOFF
:
1187 /* Check transition from IE access model:
1188 mov foo@gottpoff(%rip), %reg
1189 add foo@gottpoff(%rip), %reg
1192 /* Check REX prefix first. */
1193 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1195 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1196 if (val
!= 0x48 && val
!= 0x4c)
1198 /* X32 may have 0x44 REX prefix or no REX prefix. */
1199 if (ABI_64_P (abfd
))
1205 /* X32 may not have any REX prefix. */
1206 if (ABI_64_P (abfd
))
1208 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1212 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1213 if (val
!= 0x8b && val
!= 0x03)
1216 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1217 return (val
& 0xc7) == 5;
1219 case R_X86_64_GOTPC32_TLSDESC
:
1220 /* Check transition from GDesc access model:
1221 leaq x@tlsdesc(%rip), %rax
1223 Make sure it's a leaq adding rip to a 32-bit offset
1224 into any register, although it's probably almost always
1227 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1230 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1231 if ((val
& 0xfb) != 0x48)
1234 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1237 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1238 return (val
& 0xc7) == 0x05;
1240 case R_X86_64_TLSDESC_CALL
:
1241 /* Check transition from GDesc access model:
1242 call *x@tlsdesc(%rax)
1244 if (offset
+ 2 <= sec
->size
)
1246 /* Make sure that it's a call *x@tlsdesc(%rax). */
1247 static const unsigned char call
[] = { 0xff, 0x10 };
1248 return memcmp (contents
+ offset
, call
, 2) == 0;
1258 /* Return TRUE if the TLS access transition is OK or no transition
1259 will be performed. Update R_TYPE if there is a transition. */
1262 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1263 asection
*sec
, bfd_byte
*contents
,
1264 Elf_Internal_Shdr
*symtab_hdr
,
1265 struct elf_link_hash_entry
**sym_hashes
,
1266 unsigned int *r_type
, int tls_type
,
1267 const Elf_Internal_Rela
*rel
,
1268 const Elf_Internal_Rela
*relend
,
1269 struct elf_link_hash_entry
*h
,
1270 unsigned long r_symndx
)
1272 unsigned int from_type
= *r_type
;
1273 unsigned int to_type
= from_type
;
1274 bfd_boolean check
= TRUE
;
1276 /* Skip TLS transition for functions. */
1278 && (h
->type
== STT_FUNC
1279 || h
->type
== STT_GNU_IFUNC
))
1284 case R_X86_64_TLSGD
:
1285 case R_X86_64_GOTPC32_TLSDESC
:
1286 case R_X86_64_TLSDESC_CALL
:
1287 case R_X86_64_GOTTPOFF
:
1288 if (info
->executable
)
1291 to_type
= R_X86_64_TPOFF32
;
1293 to_type
= R_X86_64_GOTTPOFF
;
1296 /* When we are called from elf_x86_64_relocate_section,
1297 CONTENTS isn't NULL and there may be additional transitions
1298 based on TLS_TYPE. */
1299 if (contents
!= NULL
)
1301 unsigned int new_to_type
= to_type
;
1303 if (info
->executable
1306 && tls_type
== GOT_TLS_IE
)
1307 new_to_type
= R_X86_64_TPOFF32
;
1309 if (to_type
== R_X86_64_TLSGD
1310 || to_type
== R_X86_64_GOTPC32_TLSDESC
1311 || to_type
== R_X86_64_TLSDESC_CALL
)
1313 if (tls_type
== GOT_TLS_IE
)
1314 new_to_type
= R_X86_64_GOTTPOFF
;
1317 /* We checked the transition before when we were called from
1318 elf_x86_64_check_relocs. We only want to check the new
1319 transition which hasn't been checked before. */
1320 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1321 to_type
= new_to_type
;
1326 case R_X86_64_TLSLD
:
1327 if (info
->executable
)
1328 to_type
= R_X86_64_TPOFF32
;
1335 /* Return TRUE if there is no transition. */
1336 if (from_type
== to_type
)
1339 /* Check if the transition can be performed. */
1341 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1342 symtab_hdr
, sym_hashes
,
1343 from_type
, rel
, relend
))
1345 reloc_howto_type
*from
, *to
;
1348 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1349 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1352 name
= h
->root
.root
.string
;
1355 struct elf_x86_64_link_hash_table
*htab
;
1357 htab
= elf_x86_64_hash_table (info
);
1362 Elf_Internal_Sym
*isym
;
1364 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1366 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1370 (*_bfd_error_handler
)
1371 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1372 "in section `%A' failed"),
1373 abfd
, sec
, from
->name
, to
->name
, name
,
1374 (unsigned long) rel
->r_offset
);
1375 bfd_set_error (bfd_error_bad_value
);
1383 /* Look through the relocs for a section during the first phase, and
1384 calculate needed space in the global offset table, procedure
1385 linkage table, and dynamic reloc sections. */
1388 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1390 const Elf_Internal_Rela
*relocs
)
1392 struct elf_x86_64_link_hash_table
*htab
;
1393 Elf_Internal_Shdr
*symtab_hdr
;
1394 struct elf_link_hash_entry
**sym_hashes
;
1395 const Elf_Internal_Rela
*rel
;
1396 const Elf_Internal_Rela
*rel_end
;
1399 if (info
->relocatable
)
1402 BFD_ASSERT (is_x86_64_elf (abfd
));
1404 htab
= elf_x86_64_hash_table (info
);
1408 symtab_hdr
= &elf_symtab_hdr (abfd
);
1409 sym_hashes
= elf_sym_hashes (abfd
);
1413 rel_end
= relocs
+ sec
->reloc_count
;
1414 for (rel
= relocs
; rel
< rel_end
; rel
++)
1416 unsigned int r_type
;
1417 unsigned long r_symndx
;
1418 struct elf_link_hash_entry
*h
;
1419 Elf_Internal_Sym
*isym
;
1422 r_symndx
= htab
->r_sym (rel
->r_info
);
1423 r_type
= ELF32_R_TYPE (rel
->r_info
);
1425 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1427 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1432 if (r_symndx
< symtab_hdr
->sh_info
)
1434 /* A local symbol. */
1435 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1440 /* Check relocation against local STT_GNU_IFUNC symbol. */
1441 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1443 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
,
1448 /* Fake a STT_GNU_IFUNC symbol. */
1449 h
->type
= STT_GNU_IFUNC
;
1452 h
->forced_local
= 1;
1453 h
->root
.type
= bfd_link_hash_defined
;
1461 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1462 while (h
->root
.type
== bfd_link_hash_indirect
1463 || h
->root
.type
== bfd_link_hash_warning
)
1464 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1467 /* Check invalid x32 relocations. */
1468 if (!ABI_64_P (abfd
))
1474 case R_X86_64_DTPOFF64
:
1475 case R_X86_64_TPOFF64
:
1477 case R_X86_64_GOTOFF64
:
1478 case R_X86_64_GOT64
:
1479 case R_X86_64_GOTPCREL64
:
1480 case R_X86_64_GOTPC64
:
1481 case R_X86_64_GOTPLT64
:
1482 case R_X86_64_PLTOFF64
:
1485 name
= h
->root
.root
.string
;
1487 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1489 (*_bfd_error_handler
)
1490 (_("%B: relocation %s against symbol `%s' isn't "
1491 "supported in x32 mode"), abfd
,
1492 x86_64_elf_howto_table
[r_type
].name
, name
);
1493 bfd_set_error (bfd_error_bad_value
);
1501 /* Create the ifunc sections for static executables. If we
1502 never see an indirect function symbol nor we are building
1503 a static executable, those sections will be empty and
1504 won't appear in output. */
1515 case R_X86_64_PLT32
:
1516 case R_X86_64_GOTPCREL
:
1517 case R_X86_64_GOTPCREL64
:
1518 if (htab
->elf
.dynobj
== NULL
)
1519 htab
->elf
.dynobj
= abfd
;
1520 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1525 /* It is referenced by a non-shared object. */
1529 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1530 symtab_hdr
, sym_hashes
,
1531 &r_type
, GOT_UNKNOWN
,
1532 rel
, rel_end
, h
, r_symndx
))
1537 case R_X86_64_TLSLD
:
1538 htab
->tls_ld_got
.refcount
+= 1;
1541 case R_X86_64_TPOFF32
:
1542 if (!info
->executable
&& ABI_64_P (abfd
))
1545 name
= h
->root
.root
.string
;
1547 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1549 (*_bfd_error_handler
)
1550 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1552 x86_64_elf_howto_table
[r_type
].name
, name
);
1553 bfd_set_error (bfd_error_bad_value
);
1558 case R_X86_64_GOTTPOFF
:
1559 if (!info
->executable
)
1560 info
->flags
|= DF_STATIC_TLS
;
1563 case R_X86_64_GOT32
:
1564 case R_X86_64_GOTPCREL
:
1565 case R_X86_64_TLSGD
:
1566 case R_X86_64_GOT64
:
1567 case R_X86_64_GOTPCREL64
:
1568 case R_X86_64_GOTPLT64
:
1569 case R_X86_64_GOTPC32_TLSDESC
:
1570 case R_X86_64_TLSDESC_CALL
:
1571 /* This symbol requires a global offset table entry. */
1573 int tls_type
, old_tls_type
;
1577 default: tls_type
= GOT_NORMAL
; break;
1578 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1579 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1580 case R_X86_64_GOTPC32_TLSDESC
:
1581 case R_X86_64_TLSDESC_CALL
:
1582 tls_type
= GOT_TLS_GDESC
; break;
1587 if (r_type
== R_X86_64_GOTPLT64
)
1589 /* This relocation indicates that we also need
1590 a PLT entry, as this is a function. We don't need
1591 a PLT entry for local symbols. */
1593 h
->plt
.refcount
+= 1;
1595 h
->got
.refcount
+= 1;
1596 old_tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
1600 bfd_signed_vma
*local_got_refcounts
;
1602 /* This is a global offset table entry for a local symbol. */
1603 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1604 if (local_got_refcounts
== NULL
)
1608 size
= symtab_hdr
->sh_info
;
1609 size
*= sizeof (bfd_signed_vma
)
1610 + sizeof (bfd_vma
) + sizeof (char);
1611 local_got_refcounts
= ((bfd_signed_vma
*)
1612 bfd_zalloc (abfd
, size
));
1613 if (local_got_refcounts
== NULL
)
1615 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1616 elf_x86_64_local_tlsdesc_gotent (abfd
)
1617 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1618 elf_x86_64_local_got_tls_type (abfd
)
1619 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1621 local_got_refcounts
[r_symndx
] += 1;
1623 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1626 /* If a TLS symbol is accessed using IE at least once,
1627 there is no point to use dynamic model for it. */
1628 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1629 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1630 || tls_type
!= GOT_TLS_IE
))
1632 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1633 tls_type
= old_tls_type
;
1634 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1635 && GOT_TLS_GD_ANY_P (tls_type
))
1636 tls_type
|= old_tls_type
;
1640 name
= h
->root
.root
.string
;
1642 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1644 (*_bfd_error_handler
)
1645 (_("%B: '%s' accessed both as normal and thread local symbol"),
1651 if (old_tls_type
!= tls_type
)
1654 elf_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1656 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1661 case R_X86_64_GOTOFF64
:
1662 case R_X86_64_GOTPC32
:
1663 case R_X86_64_GOTPC64
:
1665 if (htab
->elf
.sgot
== NULL
)
1667 if (htab
->elf
.dynobj
== NULL
)
1668 htab
->elf
.dynobj
= abfd
;
1669 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1675 case R_X86_64_PLT32
:
1676 /* This symbol requires a procedure linkage table entry. We
1677 actually build the entry in adjust_dynamic_symbol,
1678 because this might be a case of linking PIC code which is
1679 never referenced by a dynamic object, in which case we
1680 don't need to generate a procedure linkage table entry
1683 /* If this is a local symbol, we resolve it directly without
1684 creating a procedure linkage table entry. */
1689 h
->plt
.refcount
+= 1;
1692 case R_X86_64_PLTOFF64
:
1693 /* This tries to form the 'address' of a function relative
1694 to GOT. For global symbols we need a PLT entry. */
1698 h
->plt
.refcount
+= 1;
1703 if (!ABI_64_P (abfd
))
1708 /* Let's help debug shared library creation. These relocs
1709 cannot be used in shared libs. Don't error out for
1710 sections we don't care about, such as debug sections or
1711 non-constant sections. */
1713 && (sec
->flags
& SEC_ALLOC
) != 0
1714 && (sec
->flags
& SEC_READONLY
) != 0)
1717 name
= h
->root
.root
.string
;
1719 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1720 (*_bfd_error_handler
)
1721 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1722 abfd
, x86_64_elf_howto_table
[r_type
].name
, name
);
1723 bfd_set_error (bfd_error_bad_value
);
1734 if (h
!= NULL
&& info
->executable
)
1736 /* If this reloc is in a read-only section, we might
1737 need a copy reloc. We can't check reliably at this
1738 stage whether the section is read-only, as input
1739 sections have not yet been mapped to output sections.
1740 Tentatively set the flag for now, and correct in
1741 adjust_dynamic_symbol. */
1744 /* We may need a .plt entry if the function this reloc
1745 refers to is in a shared lib. */
1746 h
->plt
.refcount
+= 1;
1747 if (r_type
!= R_X86_64_PC32
&& r_type
!= R_X86_64_PC64
)
1748 h
->pointer_equality_needed
= 1;
1751 /* If we are creating a shared library, and this is a reloc
1752 against a global symbol, or a non PC relative reloc
1753 against a local symbol, then we need to copy the reloc
1754 into the shared library. However, if we are linking with
1755 -Bsymbolic, we do not need to copy a reloc against a
1756 global symbol which is defined in an object we are
1757 including in the link (i.e., DEF_REGULAR is set). At
1758 this point we have not seen all the input files, so it is
1759 possible that DEF_REGULAR is not set now but will be set
1760 later (it is never cleared). In case of a weak definition,
1761 DEF_REGULAR may be cleared later by a strong definition in
1762 a shared library. We account for that possibility below by
1763 storing information in the relocs_copied field of the hash
1764 table entry. A similar situation occurs when creating
1765 shared libraries and symbol visibility changes render the
1768 If on the other hand, we are creating an executable, we
1769 may need to keep relocations for symbols satisfied by a
1770 dynamic library if we manage to avoid copy relocs for the
1773 && (sec
->flags
& SEC_ALLOC
) != 0
1774 && (! IS_X86_64_PCREL_TYPE (r_type
)
1776 && (! SYMBOLIC_BIND (info
, h
)
1777 || h
->root
.type
== bfd_link_hash_defweak
1778 || !h
->def_regular
))))
1779 || (ELIMINATE_COPY_RELOCS
1781 && (sec
->flags
& SEC_ALLOC
) != 0
1783 && (h
->root
.type
== bfd_link_hash_defweak
1784 || !h
->def_regular
)))
1786 struct elf_dyn_relocs
*p
;
1787 struct elf_dyn_relocs
**head
;
1789 /* We must copy these reloc types into the output file.
1790 Create a reloc section in dynobj and make room for
1794 if (htab
->elf
.dynobj
== NULL
)
1795 htab
->elf
.dynobj
= abfd
;
1797 sreloc
= _bfd_elf_make_dynamic_reloc_section
1798 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
1799 abfd
, /*rela?*/ TRUE
);
1805 /* If this is a global symbol, we count the number of
1806 relocations we need for this symbol. */
1809 head
= &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
1813 /* Track dynamic relocs needed for local syms too.
1814 We really need local syms available to do this
1819 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1824 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1828 /* Beware of type punned pointers vs strict aliasing
1830 vpp
= &(elf_section_data (s
)->local_dynrel
);
1831 head
= (struct elf_dyn_relocs
**)vpp
;
1835 if (p
== NULL
|| p
->sec
!= sec
)
1837 bfd_size_type amt
= sizeof *p
;
1839 p
= ((struct elf_dyn_relocs
*)
1840 bfd_alloc (htab
->elf
.dynobj
, amt
));
1851 if (IS_X86_64_PCREL_TYPE (r_type
))
1856 /* This relocation describes the C++ object vtable hierarchy.
1857 Reconstruct it for later use during GC. */
1858 case R_X86_64_GNU_VTINHERIT
:
1859 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1863 /* This relocation describes which C++ vtable entries are actually
1864 used. Record for later use during GC. */
1865 case R_X86_64_GNU_VTENTRY
:
1866 BFD_ASSERT (h
!= NULL
);
1868 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1880 /* Return the section that should be marked against GC for a given
1884 elf_x86_64_gc_mark_hook (asection
*sec
,
1885 struct bfd_link_info
*info
,
1886 Elf_Internal_Rela
*rel
,
1887 struct elf_link_hash_entry
*h
,
1888 Elf_Internal_Sym
*sym
)
1891 switch (ELF32_R_TYPE (rel
->r_info
))
1893 case R_X86_64_GNU_VTINHERIT
:
1894 case R_X86_64_GNU_VTENTRY
:
1898 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1901 /* Update the got entry reference counts for the section being removed. */
1904 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
1906 const Elf_Internal_Rela
*relocs
)
1908 struct elf_x86_64_link_hash_table
*htab
;
1909 Elf_Internal_Shdr
*symtab_hdr
;
1910 struct elf_link_hash_entry
**sym_hashes
;
1911 bfd_signed_vma
*local_got_refcounts
;
1912 const Elf_Internal_Rela
*rel
, *relend
;
1914 if (info
->relocatable
)
1917 htab
= elf_x86_64_hash_table (info
);
1921 elf_section_data (sec
)->local_dynrel
= NULL
;
1923 symtab_hdr
= &elf_symtab_hdr (abfd
);
1924 sym_hashes
= elf_sym_hashes (abfd
);
1925 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1927 htab
= elf_x86_64_hash_table (info
);
1928 relend
= relocs
+ sec
->reloc_count
;
1929 for (rel
= relocs
; rel
< relend
; rel
++)
1931 unsigned long r_symndx
;
1932 unsigned int r_type
;
1933 struct elf_link_hash_entry
*h
= NULL
;
1935 r_symndx
= htab
->r_sym (rel
->r_info
);
1936 if (r_symndx
>= symtab_hdr
->sh_info
)
1938 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1939 while (h
->root
.type
== bfd_link_hash_indirect
1940 || h
->root
.type
== bfd_link_hash_warning
)
1941 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1945 /* A local symbol. */
1946 Elf_Internal_Sym
*isym
;
1948 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1951 /* Check relocation against local STT_GNU_IFUNC symbol. */
1953 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1955 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
1963 struct elf_x86_64_link_hash_entry
*eh
;
1964 struct elf_dyn_relocs
**pp
;
1965 struct elf_dyn_relocs
*p
;
1967 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
1969 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1972 /* Everything must go for SEC. */
1978 r_type
= ELF32_R_TYPE (rel
->r_info
);
1979 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1980 symtab_hdr
, sym_hashes
,
1981 &r_type
, GOT_UNKNOWN
,
1982 rel
, relend
, h
, r_symndx
))
1987 case R_X86_64_TLSLD
:
1988 if (htab
->tls_ld_got
.refcount
> 0)
1989 htab
->tls_ld_got
.refcount
-= 1;
1992 case R_X86_64_TLSGD
:
1993 case R_X86_64_GOTPC32_TLSDESC
:
1994 case R_X86_64_TLSDESC_CALL
:
1995 case R_X86_64_GOTTPOFF
:
1996 case R_X86_64_GOT32
:
1997 case R_X86_64_GOTPCREL
:
1998 case R_X86_64_GOT64
:
1999 case R_X86_64_GOTPCREL64
:
2000 case R_X86_64_GOTPLT64
:
2003 if (r_type
== R_X86_64_GOTPLT64
&& h
->plt
.refcount
> 0)
2004 h
->plt
.refcount
-= 1;
2005 if (h
->got
.refcount
> 0)
2006 h
->got
.refcount
-= 1;
2007 if (h
->type
== STT_GNU_IFUNC
)
2009 if (h
->plt
.refcount
> 0)
2010 h
->plt
.refcount
-= 1;
2013 else if (local_got_refcounts
!= NULL
)
2015 if (local_got_refcounts
[r_symndx
] > 0)
2016 local_got_refcounts
[r_symndx
] -= 1;
2030 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2034 case R_X86_64_PLT32
:
2035 case R_X86_64_PLTOFF64
:
2038 if (h
->plt
.refcount
> 0)
2039 h
->plt
.refcount
-= 1;
2051 /* Adjust a symbol defined by a dynamic object and referenced by a
2052 regular object. The current definition is in some section of the
2053 dynamic object, but we're not including those sections. We have to
2054 change the definition to something the rest of the link can
2058 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2059 struct elf_link_hash_entry
*h
)
2061 struct elf_x86_64_link_hash_table
*htab
;
2063 struct elf_x86_64_link_hash_entry
*eh
;
2064 struct elf_dyn_relocs
*p
;
2066 /* STT_GNU_IFUNC symbol must go through PLT. */
2067 if (h
->type
== STT_GNU_IFUNC
)
2069 /* All local STT_GNU_IFUNC references must be treate as local
2070 calls via local PLT. */
2072 && SYMBOL_CALLS_LOCAL (info
, h
))
2074 bfd_size_type pc_count
= 0, count
= 0;
2075 struct elf_dyn_relocs
**pp
;
2077 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2078 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2080 pc_count
+= p
->pc_count
;
2081 p
->count
-= p
->pc_count
;
2090 if (pc_count
|| count
)
2094 if (h
->plt
.refcount
<= 0)
2095 h
->plt
.refcount
= 1;
2097 h
->plt
.refcount
+= 1;
2101 if (h
->plt
.refcount
<= 0)
2103 h
->plt
.offset
= (bfd_vma
) -1;
2109 /* If this is a function, put it in the procedure linkage table. We
2110 will fill in the contents of the procedure linkage table later,
2111 when we know the address of the .got section. */
2112 if (h
->type
== STT_FUNC
2115 if (h
->plt
.refcount
<= 0
2116 || SYMBOL_CALLS_LOCAL (info
, h
)
2117 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2118 && h
->root
.type
== bfd_link_hash_undefweak
))
2120 /* This case can occur if we saw a PLT32 reloc in an input
2121 file, but the symbol was never referred to by a dynamic
2122 object, or if all references were garbage collected. In
2123 such a case, we don't actually need to build a procedure
2124 linkage table, and we can just do a PC32 reloc instead. */
2125 h
->plt
.offset
= (bfd_vma
) -1;
2132 /* It's possible that we incorrectly decided a .plt reloc was
2133 needed for an R_X86_64_PC32 reloc to a non-function sym in
2134 check_relocs. We can't decide accurately between function and
2135 non-function syms in check-relocs; Objects loaded later in
2136 the link may change h->type. So fix it now. */
2137 h
->plt
.offset
= (bfd_vma
) -1;
2139 /* If this is a weak symbol, and there is a real definition, the
2140 processor independent code will have arranged for us to see the
2141 real definition first, and we can just use the same value. */
2142 if (h
->u
.weakdef
!= NULL
)
2144 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2145 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2146 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2147 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2148 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2149 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2153 /* This is a reference to a symbol defined by a dynamic object which
2154 is not a function. */
2156 /* If we are creating a shared library, we must presume that the
2157 only references to the symbol are via the global offset table.
2158 For such cases we need not do anything here; the relocations will
2159 be handled correctly by relocate_section. */
2163 /* If there are no references to this symbol that do not use the
2164 GOT, we don't need to generate a copy reloc. */
2165 if (!h
->non_got_ref
)
2168 /* If -z nocopyreloc was given, we won't generate them either. */
2169 if (info
->nocopyreloc
)
2175 if (ELIMINATE_COPY_RELOCS
)
2177 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2178 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2180 s
= p
->sec
->output_section
;
2181 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2185 /* If we didn't find any dynamic relocs in read-only sections, then
2186 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2194 /* We must allocate the symbol in our .dynbss section, which will
2195 become part of the .bss section of the executable. There will be
2196 an entry for this symbol in the .dynsym section. The dynamic
2197 object will contain position independent code, so all references
2198 from the dynamic object to this symbol will go through the global
2199 offset table. The dynamic linker will use the .dynsym entry to
2200 determine the address it must put in the global offset table, so
2201 both the dynamic object and the regular object will refer to the
2202 same memory location for the variable. */
2204 htab
= elf_x86_64_hash_table (info
);
2208 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2209 to copy the initial value out of the dynamic object and into the
2210 runtime process image. */
2211 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2213 const struct elf_backend_data
*bed
;
2214 bed
= get_elf_backend_data (info
->output_bfd
);
2215 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2221 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2224 /* Allocate space in .plt, .got and associated reloc sections for
2228 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2230 struct bfd_link_info
*info
;
2231 struct elf_x86_64_link_hash_table
*htab
;
2232 struct elf_x86_64_link_hash_entry
*eh
;
2233 struct elf_dyn_relocs
*p
;
2234 const struct elf_backend_data
*bed
;
2235 unsigned int plt_entry_size
;
2237 if (h
->root
.type
== bfd_link_hash_indirect
)
2240 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2242 info
= (struct bfd_link_info
*) inf
;
2243 htab
= elf_x86_64_hash_table (info
);
2246 bed
= get_elf_backend_data (info
->output_bfd
);
2247 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2249 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2250 here if it is defined and referenced in a non-shared object. */
2251 if (h
->type
== STT_GNU_IFUNC
2253 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2257 else if (htab
->elf
.dynamic_sections_created
2258 && h
->plt
.refcount
> 0)
2260 /* Make sure this symbol is output as a dynamic symbol.
2261 Undefined weak syms won't yet be marked as dynamic. */
2262 if (h
->dynindx
== -1
2263 && !h
->forced_local
)
2265 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2270 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2272 asection
*s
= htab
->elf
.splt
;
2274 /* If this is the first .plt entry, make room for the special
2277 s
->size
+= plt_entry_size
;
2279 h
->plt
.offset
= s
->size
;
2281 /* If this symbol is not defined in a regular file, and we are
2282 not generating a shared library, then set the symbol to this
2283 location in the .plt. This is required to make function
2284 pointers compare as equal between the normal executable and
2285 the shared library. */
2289 h
->root
.u
.def
.section
= s
;
2290 h
->root
.u
.def
.value
= h
->plt
.offset
;
2293 /* Make room for this entry. */
2294 s
->size
+= plt_entry_size
;
2296 /* We also need to make an entry in the .got.plt section, which
2297 will be placed in the .got section by the linker script. */
2298 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2300 /* We also need to make an entry in the .rela.plt section. */
2301 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2302 htab
->elf
.srelplt
->reloc_count
++;
2306 h
->plt
.offset
= (bfd_vma
) -1;
2312 h
->plt
.offset
= (bfd_vma
) -1;
2316 eh
->tlsdesc_got
= (bfd_vma
) -1;
2318 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2319 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2320 if (h
->got
.refcount
> 0
2323 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2325 h
->got
.offset
= (bfd_vma
) -1;
2327 else if (h
->got
.refcount
> 0)
2331 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2333 /* Make sure this symbol is output as a dynamic symbol.
2334 Undefined weak syms won't yet be marked as dynamic. */
2335 if (h
->dynindx
== -1
2336 && !h
->forced_local
)
2338 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2342 if (GOT_TLS_GDESC_P (tls_type
))
2344 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2345 - elf_x86_64_compute_jump_table_size (htab
);
2346 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2347 h
->got
.offset
= (bfd_vma
) -2;
2349 if (! GOT_TLS_GDESC_P (tls_type
)
2350 || GOT_TLS_GD_P (tls_type
))
2353 h
->got
.offset
= s
->size
;
2354 s
->size
+= GOT_ENTRY_SIZE
;
2355 if (GOT_TLS_GD_P (tls_type
))
2356 s
->size
+= GOT_ENTRY_SIZE
;
2358 dyn
= htab
->elf
.dynamic_sections_created
;
2359 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2361 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2362 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2363 || tls_type
== GOT_TLS_IE
)
2364 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2365 else if (GOT_TLS_GD_P (tls_type
))
2366 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2367 else if (! GOT_TLS_GDESC_P (tls_type
)
2368 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2369 || h
->root
.type
!= bfd_link_hash_undefweak
)
2371 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2372 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2373 if (GOT_TLS_GDESC_P (tls_type
))
2375 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2376 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2380 h
->got
.offset
= (bfd_vma
) -1;
2382 if (eh
->dyn_relocs
== NULL
)
2385 /* In the shared -Bsymbolic case, discard space allocated for
2386 dynamic pc-relative relocs against symbols which turn out to be
2387 defined in regular objects. For the normal shared case, discard
2388 space for pc-relative relocs that have become local due to symbol
2389 visibility changes. */
2393 /* Relocs that use pc_count are those that appear on a call
2394 insn, or certain REL relocs that can generated via assembly.
2395 We want calls to protected symbols to resolve directly to the
2396 function rather than going via the plt. If people want
2397 function pointer comparisons to work as expected then they
2398 should avoid writing weird assembly. */
2399 if (SYMBOL_CALLS_LOCAL (info
, h
))
2401 struct elf_dyn_relocs
**pp
;
2403 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2405 p
->count
-= p
->pc_count
;
2414 /* Also discard relocs on undefined weak syms with non-default
2416 if (eh
->dyn_relocs
!= NULL
2417 && h
->root
.type
== bfd_link_hash_undefweak
)
2419 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2420 eh
->dyn_relocs
= NULL
;
2422 /* Make sure undefined weak symbols are output as a dynamic
2424 else if (h
->dynindx
== -1
2425 && ! h
->forced_local
2426 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2431 else if (ELIMINATE_COPY_RELOCS
)
2433 /* For the non-shared case, discard space for relocs against
2434 symbols which turn out to need copy relocs or are not
2440 || (htab
->elf
.dynamic_sections_created
2441 && (h
->root
.type
== bfd_link_hash_undefweak
2442 || h
->root
.type
== bfd_link_hash_undefined
))))
2444 /* Make sure this symbol is output as a dynamic symbol.
2445 Undefined weak syms won't yet be marked as dynamic. */
2446 if (h
->dynindx
== -1
2447 && ! h
->forced_local
2448 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2451 /* If that succeeded, we know we'll be keeping all the
2453 if (h
->dynindx
!= -1)
2457 eh
->dyn_relocs
= NULL
;
2462 /* Finally, allocate space. */
2463 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2467 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2469 BFD_ASSERT (sreloc
!= NULL
);
2471 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2477 /* Allocate space in .plt, .got and associated reloc sections for
2478 local dynamic relocs. */
2481 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2483 struct elf_link_hash_entry
*h
2484 = (struct elf_link_hash_entry
*) *slot
;
2486 if (h
->type
!= STT_GNU_IFUNC
2490 || h
->root
.type
!= bfd_link_hash_defined
)
2493 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2496 /* Find any dynamic relocs that apply to read-only sections. */
2499 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2502 struct elf_x86_64_link_hash_entry
*eh
;
2503 struct elf_dyn_relocs
*p
;
2505 /* Skip local IFUNC symbols. */
2506 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2509 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2510 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2512 asection
*s
= p
->sec
->output_section
;
2514 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2516 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2518 info
->flags
|= DF_TEXTREL
;
2520 if (info
->warn_shared_textrel
&& info
->shared
)
2521 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2522 p
->sec
->owner
, h
->root
.root
.string
,
2525 /* Not an error, just cut short the traversal. */
2533 mov foo@GOTPCREL(%rip), %reg
2536 with the local symbol, foo. */
2539 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2540 struct bfd_link_info
*link_info
)
2542 Elf_Internal_Shdr
*symtab_hdr
;
2543 Elf_Internal_Rela
*internal_relocs
;
2544 Elf_Internal_Rela
*irel
, *irelend
;
2546 struct elf_x86_64_link_hash_table
*htab
;
2547 bfd_boolean changed_contents
;
2548 bfd_boolean changed_relocs
;
2549 bfd_signed_vma
*local_got_refcounts
;
2551 /* Don't even try to convert non-ELF outputs. */
2552 if (!is_elf_hash_table (link_info
->hash
))
2555 /* Nothing to do if there are no codes, no relocations or no output. */
2556 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2557 || sec
->reloc_count
== 0
2558 || discarded_section (sec
))
2561 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2563 /* Load the relocations for this section. */
2564 internal_relocs
= (_bfd_elf_link_read_relocs
2565 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2566 link_info
->keep_memory
));
2567 if (internal_relocs
== NULL
)
2570 htab
= elf_x86_64_hash_table (link_info
);
2571 changed_contents
= FALSE
;
2572 changed_relocs
= FALSE
;
2573 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2575 /* Get the section contents. */
2576 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2577 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2580 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2584 irelend
= internal_relocs
+ sec
->reloc_count
;
2585 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2587 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2588 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2590 struct elf_link_hash_entry
*h
;
2592 if (r_type
!= R_X86_64_GOTPCREL
)
2595 /* Get the symbol referred to by the reloc. */
2596 if (r_symndx
< symtab_hdr
->sh_info
)
2598 Elf_Internal_Sym
*isym
;
2600 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2603 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2604 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2605 && bfd_get_8 (input_bfd
,
2606 contents
+ irel
->r_offset
- 2) == 0x8b)
2608 bfd_put_8 (output_bfd
, 0x8d,
2609 contents
+ irel
->r_offset
- 2);
2610 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2611 if (local_got_refcounts
!= NULL
2612 && local_got_refcounts
[r_symndx
] > 0)
2613 local_got_refcounts
[r_symndx
] -= 1;
2614 changed_contents
= TRUE
;
2615 changed_relocs
= TRUE
;
2620 indx
= r_symndx
- symtab_hdr
->sh_info
;
2621 h
= elf_sym_hashes (abfd
)[indx
];
2622 BFD_ASSERT (h
!= NULL
);
2624 while (h
->root
.type
== bfd_link_hash_indirect
2625 || h
->root
.type
== bfd_link_hash_warning
)
2626 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2628 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2629 avoid optimizing _DYNAMIC since ld.so may use its link-time
2632 && h
->type
!= STT_GNU_IFUNC
2633 && h
!= htab
->elf
.hdynamic
2634 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2635 && bfd_get_8 (input_bfd
,
2636 contents
+ irel
->r_offset
- 2) == 0x8b)
2638 bfd_put_8 (output_bfd
, 0x8d,
2639 contents
+ irel
->r_offset
- 2);
2640 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2641 if (h
->got
.refcount
> 0)
2642 h
->got
.refcount
-= 1;
2643 changed_contents
= TRUE
;
2644 changed_relocs
= TRUE
;
2648 if (contents
!= NULL
2649 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2651 if (!changed_contents
&& !link_info
->keep_memory
)
2655 /* Cache the section contents for elf_link_input_bfd. */
2656 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2660 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2662 if (!changed_relocs
)
2663 free (internal_relocs
);
2665 elf_section_data (sec
)->relocs
= internal_relocs
;
2671 if (contents
!= NULL
2672 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2674 if (internal_relocs
!= NULL
2675 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2676 free (internal_relocs
);
2680 /* Set the sizes of the dynamic sections. */
2683 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
2684 struct bfd_link_info
*info
)
2686 struct elf_x86_64_link_hash_table
*htab
;
2691 const struct elf_backend_data
*bed
;
2693 htab
= elf_x86_64_hash_table (info
);
2696 bed
= get_elf_backend_data (output_bfd
);
2698 dynobj
= htab
->elf
.dynobj
;
2702 if (htab
->elf
.dynamic_sections_created
)
2704 /* Set the contents of the .interp section to the interpreter. */
2705 if (info
->executable
)
2707 s
= bfd_get_linker_section (dynobj
, ".interp");
2710 s
->size
= htab
->dynamic_interpreter_size
;
2711 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
2715 /* Set up .got offsets for local syms, and space for local dynamic
2717 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2719 bfd_signed_vma
*local_got
;
2720 bfd_signed_vma
*end_local_got
;
2721 char *local_tls_type
;
2722 bfd_vma
*local_tlsdesc_gotent
;
2723 bfd_size_type locsymcount
;
2724 Elf_Internal_Shdr
*symtab_hdr
;
2727 if (! is_x86_64_elf (ibfd
))
2730 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2732 struct elf_dyn_relocs
*p
;
2734 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
2737 for (p
= (struct elf_dyn_relocs
*)
2738 (elf_section_data (s
)->local_dynrel
);
2742 if (!bfd_is_abs_section (p
->sec
)
2743 && bfd_is_abs_section (p
->sec
->output_section
))
2745 /* Input section has been discarded, either because
2746 it is a copy of a linkonce section or due to
2747 linker script /DISCARD/, so we'll be discarding
2750 else if (p
->count
!= 0)
2752 srel
= elf_section_data (p
->sec
)->sreloc
;
2753 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2754 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2755 && (info
->flags
& DF_TEXTREL
) == 0)
2757 info
->flags
|= DF_TEXTREL
;
2758 if (info
->warn_shared_textrel
&& info
->shared
)
2759 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2760 p
->sec
->owner
, p
->sec
);
2766 local_got
= elf_local_got_refcounts (ibfd
);
2770 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2771 locsymcount
= symtab_hdr
->sh_info
;
2772 end_local_got
= local_got
+ locsymcount
;
2773 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
2774 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
2776 srel
= htab
->elf
.srelgot
;
2777 for (; local_got
< end_local_got
;
2778 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2780 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2783 if (GOT_TLS_GDESC_P (*local_tls_type
))
2785 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2786 - elf_x86_64_compute_jump_table_size (htab
);
2787 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2788 *local_got
= (bfd_vma
) -2;
2790 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2791 || GOT_TLS_GD_P (*local_tls_type
))
2793 *local_got
= s
->size
;
2794 s
->size
+= GOT_ENTRY_SIZE
;
2795 if (GOT_TLS_GD_P (*local_tls_type
))
2796 s
->size
+= GOT_ENTRY_SIZE
;
2799 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2800 || *local_tls_type
== GOT_TLS_IE
)
2802 if (GOT_TLS_GDESC_P (*local_tls_type
))
2804 htab
->elf
.srelplt
->size
2805 += bed
->s
->sizeof_rela
;
2806 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2808 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2809 || GOT_TLS_GD_P (*local_tls_type
))
2810 srel
->size
+= bed
->s
->sizeof_rela
;
2814 *local_got
= (bfd_vma
) -1;
2818 if (htab
->tls_ld_got
.refcount
> 0)
2820 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2822 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
2823 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
2824 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2827 htab
->tls_ld_got
.offset
= -1;
2829 /* Allocate global sym .plt and .got entries, and space for global
2830 sym dynamic relocs. */
2831 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
2834 /* Allocate .plt and .got entries, and space for local symbols. */
2835 htab_traverse (htab
->loc_hash_table
,
2836 elf_x86_64_allocate_local_dynrelocs
,
2839 /* For every jump slot reserved in the sgotplt, reloc_count is
2840 incremented. However, when we reserve space for TLS descriptors,
2841 it's not incremented, so in order to compute the space reserved
2842 for them, it suffices to multiply the reloc count by the jump
2845 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2846 so that R_X86_64_IRELATIVE entries come last. */
2847 if (htab
->elf
.srelplt
)
2849 htab
->sgotplt_jump_table_size
2850 = elf_x86_64_compute_jump_table_size (htab
);
2851 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2853 else if (htab
->elf
.irelplt
)
2854 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2856 if (htab
->tlsdesc_plt
)
2858 /* If we're not using lazy TLS relocations, don't generate the
2859 PLT and GOT entries they require. */
2860 if ((info
->flags
& DF_BIND_NOW
))
2861 htab
->tlsdesc_plt
= 0;
2864 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
2865 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
2866 /* Reserve room for the initial entry.
2867 FIXME: we could probably do away with it in this case. */
2868 if (htab
->elf
.splt
->size
== 0)
2869 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
2870 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
2871 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
2875 if (htab
->elf
.sgotplt
)
2877 /* Don't allocate .got.plt section if there are no GOT nor PLT
2878 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2879 if ((htab
->elf
.hgot
== NULL
2880 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2881 && (htab
->elf
.sgotplt
->size
2882 == get_elf_backend_data (output_bfd
)->got_header_size
)
2883 && (htab
->elf
.splt
== NULL
2884 || htab
->elf
.splt
->size
== 0)
2885 && (htab
->elf
.sgot
== NULL
2886 || htab
->elf
.sgot
->size
== 0)
2887 && (htab
->elf
.iplt
== NULL
2888 || htab
->elf
.iplt
->size
== 0)
2889 && (htab
->elf
.igotplt
== NULL
2890 || htab
->elf
.igotplt
->size
== 0))
2891 htab
->elf
.sgotplt
->size
= 0;
2894 if (htab
->plt_eh_frame
!= NULL
2895 && htab
->elf
.splt
!= NULL
2896 && htab
->elf
.splt
->size
!= 0
2897 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2898 && _bfd_elf_eh_frame_present (info
))
2900 const struct elf_x86_64_backend_data
*arch_data
2901 = (const struct elf_x86_64_backend_data
*) bed
->arch_data
;
2902 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
2905 /* We now have determined the sizes of the various dynamic sections.
2906 Allocate memory for them. */
2908 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2910 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2913 if (s
== htab
->elf
.splt
2914 || s
== htab
->elf
.sgot
2915 || s
== htab
->elf
.sgotplt
2916 || s
== htab
->elf
.iplt
2917 || s
== htab
->elf
.igotplt
2918 || s
== htab
->plt_eh_frame
2919 || s
== htab
->sdynbss
)
2921 /* Strip this section if we don't need it; see the
2924 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2926 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
2929 /* We use the reloc_count field as a counter if we need
2930 to copy relocs into the output file. */
2931 if (s
!= htab
->elf
.srelplt
)
2936 /* It's not one of our sections, so don't allocate space. */
2942 /* If we don't need this section, strip it from the
2943 output file. This is mostly to handle .rela.bss and
2944 .rela.plt. We must create both sections in
2945 create_dynamic_sections, because they must be created
2946 before the linker maps input sections to output
2947 sections. The linker does that before
2948 adjust_dynamic_symbol is called, and it is that
2949 function which decides whether anything needs to go
2950 into these sections. */
2952 s
->flags
|= SEC_EXCLUDE
;
2956 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2959 /* Allocate memory for the section contents. We use bfd_zalloc
2960 here in case unused entries are not reclaimed before the
2961 section's contents are written out. This should not happen,
2962 but this way if it does, we get a R_X86_64_NONE reloc instead
2964 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2965 if (s
->contents
== NULL
)
2969 if (htab
->plt_eh_frame
!= NULL
2970 && htab
->plt_eh_frame
->contents
!= NULL
)
2972 const struct elf_x86_64_backend_data
*arch_data
2973 = (const struct elf_x86_64_backend_data
*) bed
->arch_data
;
2975 memcpy (htab
->plt_eh_frame
->contents
,
2976 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
2977 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
2978 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
2981 if (htab
->elf
.dynamic_sections_created
)
2983 /* Add some entries to the .dynamic section. We fill in the
2984 values later, in elf_x86_64_finish_dynamic_sections, but we
2985 must add the entries now so that we get the correct size for
2986 the .dynamic section. The DT_DEBUG entry is filled in by the
2987 dynamic linker and used by the debugger. */
2988 #define add_dynamic_entry(TAG, VAL) \
2989 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2991 if (info
->executable
)
2993 if (!add_dynamic_entry (DT_DEBUG
, 0))
2997 if (htab
->elf
.splt
->size
!= 0)
2999 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3000 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3001 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3002 || !add_dynamic_entry (DT_JMPREL
, 0))
3005 if (htab
->tlsdesc_plt
3006 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3007 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3013 if (!add_dynamic_entry (DT_RELA
, 0)
3014 || !add_dynamic_entry (DT_RELASZ
, 0)
3015 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3018 /* If any dynamic relocs apply to a read-only section,
3019 then we need a DT_TEXTREL entry. */
3020 if ((info
->flags
& DF_TEXTREL
) == 0)
3021 elf_link_hash_traverse (&htab
->elf
,
3022 elf_x86_64_readonly_dynrelocs
,
3025 if ((info
->flags
& DF_TEXTREL
) != 0)
3027 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3032 #undef add_dynamic_entry
3038 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3039 struct bfd_link_info
*info
)
3041 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3045 struct elf_link_hash_entry
*tlsbase
;
3047 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3048 "_TLS_MODULE_BASE_",
3049 FALSE
, FALSE
, FALSE
);
3051 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3053 struct elf_x86_64_link_hash_table
*htab
;
3054 struct bfd_link_hash_entry
*bh
= NULL
;
3055 const struct elf_backend_data
*bed
3056 = get_elf_backend_data (output_bfd
);
3058 htab
= elf_x86_64_hash_table (info
);
3062 if (!(_bfd_generic_link_add_one_symbol
3063 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3064 tls_sec
, 0, NULL
, FALSE
,
3065 bed
->collect
, &bh
)))
3068 htab
->tls_module_base
= bh
;
3070 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3071 tlsbase
->def_regular
= 1;
3072 tlsbase
->other
= STV_HIDDEN
;
3073 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3080 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3081 executables. Rather than setting it to the beginning of the TLS
3082 section, we have to set it to the end. This function may be called
3083 multiple times, it is idempotent. */
3086 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3088 struct elf_x86_64_link_hash_table
*htab
;
3089 struct bfd_link_hash_entry
*base
;
3091 if (!info
->executable
)
3094 htab
= elf_x86_64_hash_table (info
);
3098 base
= htab
->tls_module_base
;
3102 base
->u
.def
.value
= htab
->elf
.tls_size
;
3105 /* Return the base VMA address which should be subtracted from real addresses
3106 when resolving @dtpoff relocation.
3107 This is PT_TLS segment p_vaddr. */
3110 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3112 /* If tls_sec is NULL, we should have signalled an error already. */
3113 if (elf_hash_table (info
)->tls_sec
== NULL
)
3115 return elf_hash_table (info
)->tls_sec
->vma
;
3118 /* Return the relocation value for @tpoff relocation
3119 if STT_TLS virtual address is ADDRESS. */
3122 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3124 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3125 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3126 bfd_vma static_tls_size
;
3128 /* If tls_segment is NULL, we should have signalled an error already. */
3129 if (htab
->tls_sec
== NULL
)
3132 /* Consider special static TLS alignment requirements. */
3133 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3134 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3137 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3141 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3143 /* Opcode Instruction
3146 0x0f 0x8x conditional jump */
3148 && (contents
[offset
- 1] == 0xe8
3149 || contents
[offset
- 1] == 0xe9))
3151 && contents
[offset
- 2] == 0x0f
3152 && (contents
[offset
- 1] & 0xf0) == 0x80));
3155 /* Relocate an x86_64 ELF section. */
3158 elf_x86_64_relocate_section (bfd
*output_bfd
,
3159 struct bfd_link_info
*info
,
3161 asection
*input_section
,
3163 Elf_Internal_Rela
*relocs
,
3164 Elf_Internal_Sym
*local_syms
,
3165 asection
**local_sections
)
3167 struct elf_x86_64_link_hash_table
*htab
;
3168 Elf_Internal_Shdr
*symtab_hdr
;
3169 struct elf_link_hash_entry
**sym_hashes
;
3170 bfd_vma
*local_got_offsets
;
3171 bfd_vma
*local_tlsdesc_gotents
;
3172 Elf_Internal_Rela
*rel
;
3173 Elf_Internal_Rela
*relend
;
3174 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3176 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3178 htab
= elf_x86_64_hash_table (info
);
3181 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3182 sym_hashes
= elf_sym_hashes (input_bfd
);
3183 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3184 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3186 elf_x86_64_set_tls_module_base (info
);
3189 relend
= relocs
+ input_section
->reloc_count
;
3190 for (; rel
< relend
; rel
++)
3192 unsigned int r_type
;
3193 reloc_howto_type
*howto
;
3194 unsigned long r_symndx
;
3195 struct elf_link_hash_entry
*h
;
3196 Elf_Internal_Sym
*sym
;
3198 bfd_vma off
, offplt
;
3200 bfd_boolean unresolved_reloc
;
3201 bfd_reloc_status_type r
;
3205 r_type
= ELF32_R_TYPE (rel
->r_info
);
3206 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3207 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3210 if (r_type
>= R_X86_64_max
)
3212 bfd_set_error (bfd_error_bad_value
);
3216 if (r_type
!= (int) R_X86_64_32
3217 || ABI_64_P (output_bfd
))
3218 howto
= x86_64_elf_howto_table
+ r_type
;
3220 howto
= (x86_64_elf_howto_table
3221 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3222 r_symndx
= htab
->r_sym (rel
->r_info
);
3226 unresolved_reloc
= FALSE
;
3227 if (r_symndx
< symtab_hdr
->sh_info
)
3229 sym
= local_syms
+ r_symndx
;
3230 sec
= local_sections
[r_symndx
];
3232 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3235 /* Relocate against local STT_GNU_IFUNC symbol. */
3236 if (!info
->relocatable
3237 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3239 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3244 /* Set STT_GNU_IFUNC symbol value. */
3245 h
->root
.u
.def
.value
= sym
->st_value
;
3246 h
->root
.u
.def
.section
= sec
;
3251 bfd_boolean warned ATTRIBUTE_UNUSED
;
3253 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3254 r_symndx
, symtab_hdr
, sym_hashes
,
3256 unresolved_reloc
, warned
);
3259 if (sec
!= NULL
&& discarded_section (sec
))
3260 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3261 rel
, 1, relend
, howto
, 0, contents
);
3263 if (info
->relocatable
)
3266 if (rel
->r_addend
== 0
3267 && r_type
== R_X86_64_64
3268 && !ABI_64_P (output_bfd
))
3270 /* For x32, treat R_X86_64_64 like R_X86_64_32 and zero-extend
3271 it to 64bit if addend is zero. */
3272 r_type
= R_X86_64_32
;
3273 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3276 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3277 it here if it is defined in a non-shared object. */
3279 && h
->type
== STT_GNU_IFUNC
3286 if ((input_section
->flags
& SEC_ALLOC
) == 0
3287 || h
->plt
.offset
== (bfd_vma
) -1)
3290 /* STT_GNU_IFUNC symbol must go through PLT. */
3291 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
3292 relocation
= (plt
->output_section
->vma
3293 + plt
->output_offset
+ h
->plt
.offset
);
3298 if (h
->root
.root
.string
)
3299 name
= h
->root
.root
.string
;
3301 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3303 (*_bfd_error_handler
)
3304 (_("%B: relocation %s against STT_GNU_IFUNC "
3305 "symbol `%s' isn't handled by %s"), input_bfd
,
3306 x86_64_elf_howto_table
[r_type
].name
,
3307 name
, __FUNCTION__
);
3308 bfd_set_error (bfd_error_bad_value
);
3317 if (ABI_64_P (output_bfd
))
3321 if (rel
->r_addend
!= 0)
3323 if (h
->root
.root
.string
)
3324 name
= h
->root
.root
.string
;
3326 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3328 (*_bfd_error_handler
)
3329 (_("%B: relocation %s against STT_GNU_IFUNC "
3330 "symbol `%s' has non-zero addend: %d"),
3331 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3332 name
, rel
->r_addend
);
3333 bfd_set_error (bfd_error_bad_value
);
3337 /* Generate dynamic relcoation only when there is a
3338 non-GOT reference in a shared object. */
3339 if (info
->shared
&& h
->non_got_ref
)
3341 Elf_Internal_Rela outrel
;
3344 /* Need a dynamic relocation to get the real function
3346 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3350 if (outrel
.r_offset
== (bfd_vma
) -1
3351 || outrel
.r_offset
== (bfd_vma
) -2)
3354 outrel
.r_offset
+= (input_section
->output_section
->vma
3355 + input_section
->output_offset
);
3357 if (h
->dynindx
== -1
3359 || info
->executable
)
3361 /* This symbol is resolved locally. */
3362 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3363 outrel
.r_addend
= (h
->root
.u
.def
.value
3364 + h
->root
.u
.def
.section
->output_section
->vma
3365 + h
->root
.u
.def
.section
->output_offset
);
3369 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3370 outrel
.r_addend
= 0;
3373 sreloc
= htab
->elf
.irelifunc
;
3374 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3376 /* If this reloc is against an external symbol, we
3377 do not want to fiddle with the addend. Otherwise,
3378 we need to include the symbol value so that it
3379 becomes an addend for the dynamic reloc. For an
3380 internal symbol, we have updated addend. */
3386 case R_X86_64_PLT32
:
3389 case R_X86_64_GOTPCREL
:
3390 case R_X86_64_GOTPCREL64
:
3391 base_got
= htab
->elf
.sgot
;
3392 off
= h
->got
.offset
;
3394 if (base_got
== NULL
)
3397 if (off
== (bfd_vma
) -1)
3399 /* We can't use h->got.offset here to save state, or
3400 even just remember the offset, as finish_dynamic_symbol
3401 would use that as offset into .got. */
3403 if (htab
->elf
.splt
!= NULL
)
3405 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3406 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3407 base_got
= htab
->elf
.sgotplt
;
3411 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3412 off
= plt_index
* GOT_ENTRY_SIZE
;
3413 base_got
= htab
->elf
.igotplt
;
3416 if (h
->dynindx
== -1
3420 /* This references the local defitionion. We must
3421 initialize this entry in the global offset table.
3422 Since the offset must always be a multiple of 8,
3423 we use the least significant bit to record
3424 whether we have initialized it already.
3426 When doing a dynamic link, we create a .rela.got
3427 relocation entry to initialize the value. This
3428 is done in the finish_dynamic_symbol routine. */
3433 bfd_put_64 (output_bfd
, relocation
,
3434 base_got
->contents
+ off
);
3435 /* Note that this is harmless for the GOTPLT64
3436 case, as -1 | 1 still is -1. */
3442 relocation
= (base_got
->output_section
->vma
3443 + base_got
->output_offset
+ off
);
3449 /* When generating a shared object, the relocations handled here are
3450 copied into the output file to be resolved at run time. */
3453 case R_X86_64_GOT32
:
3454 case R_X86_64_GOT64
:
3455 /* Relocation is to the entry for this symbol in the global
3457 case R_X86_64_GOTPCREL
:
3458 case R_X86_64_GOTPCREL64
:
3459 /* Use global offset table entry as symbol value. */
3460 case R_X86_64_GOTPLT64
:
3461 /* This is the same as GOT64 for relocation purposes, but
3462 indicates the existence of a PLT entry. The difficulty is,
3463 that we must calculate the GOT slot offset from the PLT
3464 offset, if this symbol got a PLT entry (it was global).
3465 Additionally if it's computed from the PLT entry, then that
3466 GOT offset is relative to .got.plt, not to .got. */
3467 base_got
= htab
->elf
.sgot
;
3469 if (htab
->elf
.sgot
== NULL
)
3476 off
= h
->got
.offset
;
3478 && h
->plt
.offset
!= (bfd_vma
)-1
3479 && off
== (bfd_vma
)-1)
3481 /* We can't use h->got.offset here to save
3482 state, or even just remember the offset, as
3483 finish_dynamic_symbol would use that as offset into
3485 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3486 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3487 base_got
= htab
->elf
.sgotplt
;
3490 dyn
= htab
->elf
.dynamic_sections_created
;
3492 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3494 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3495 || (ELF_ST_VISIBILITY (h
->other
)
3496 && h
->root
.type
== bfd_link_hash_undefweak
))
3498 /* This is actually a static link, or it is a -Bsymbolic
3499 link and the symbol is defined locally, or the symbol
3500 was forced to be local because of a version file. We
3501 must initialize this entry in the global offset table.
3502 Since the offset must always be a multiple of 8, we
3503 use the least significant bit to record whether we
3504 have initialized it already.
3506 When doing a dynamic link, we create a .rela.got
3507 relocation entry to initialize the value. This is
3508 done in the finish_dynamic_symbol routine. */
3513 bfd_put_64 (output_bfd
, relocation
,
3514 base_got
->contents
+ off
);
3515 /* Note that this is harmless for the GOTPLT64 case,
3516 as -1 | 1 still is -1. */
3521 unresolved_reloc
= FALSE
;
3525 if (local_got_offsets
== NULL
)
3528 off
= local_got_offsets
[r_symndx
];
3530 /* The offset must always be a multiple of 8. We use
3531 the least significant bit to record whether we have
3532 already generated the necessary reloc. */
3537 bfd_put_64 (output_bfd
, relocation
,
3538 base_got
->contents
+ off
);
3543 Elf_Internal_Rela outrel
;
3545 /* We need to generate a R_X86_64_RELATIVE reloc
3546 for the dynamic linker. */
3547 s
= htab
->elf
.srelgot
;
3551 outrel
.r_offset
= (base_got
->output_section
->vma
3552 + base_got
->output_offset
3554 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3555 outrel
.r_addend
= relocation
;
3556 elf_append_rela (output_bfd
, s
, &outrel
);
3559 local_got_offsets
[r_symndx
] |= 1;
3563 if (off
>= (bfd_vma
) -2)
3566 relocation
= base_got
->output_section
->vma
3567 + base_got
->output_offset
+ off
;
3568 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
3569 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3570 - htab
->elf
.sgotplt
->output_offset
;
3574 case R_X86_64_GOTOFF64
:
3575 /* Relocation is relative to the start of the global offset
3578 /* Check to make sure it isn't a protected function symbol
3579 for shared library since it may not be local when used
3580 as function address. */
3581 if (!info
->executable
3583 && !SYMBOLIC_BIND (info
, h
)
3585 && h
->type
== STT_FUNC
3586 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3588 (*_bfd_error_handler
)
3589 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3590 input_bfd
, h
->root
.root
.string
);
3591 bfd_set_error (bfd_error_bad_value
);
3595 /* Note that sgot is not involved in this
3596 calculation. We always want the start of .got.plt. If we
3597 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3598 permitted by the ABI, we might have to change this
3600 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3601 + htab
->elf
.sgotplt
->output_offset
;
3604 case R_X86_64_GOTPC32
:
3605 case R_X86_64_GOTPC64
:
3606 /* Use global offset table as symbol value. */
3607 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3608 + htab
->elf
.sgotplt
->output_offset
;
3609 unresolved_reloc
= FALSE
;
3612 case R_X86_64_PLTOFF64
:
3613 /* Relocation is PLT entry relative to GOT. For local
3614 symbols it's the symbol itself relative to GOT. */
3616 /* See PLT32 handling. */
3617 && h
->plt
.offset
!= (bfd_vma
) -1
3618 && htab
->elf
.splt
!= NULL
)
3620 relocation
= (htab
->elf
.splt
->output_section
->vma
3621 + htab
->elf
.splt
->output_offset
3623 unresolved_reloc
= FALSE
;
3626 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3627 + htab
->elf
.sgotplt
->output_offset
;
3630 case R_X86_64_PLT32
:
3631 /* Relocation is to the entry for this symbol in the
3632 procedure linkage table. */
3634 /* Resolve a PLT32 reloc against a local symbol directly,
3635 without using the procedure linkage table. */
3639 if (h
->plt
.offset
== (bfd_vma
) -1
3640 || htab
->elf
.splt
== NULL
)
3642 /* We didn't make a PLT entry for this symbol. This
3643 happens when statically linking PIC code, or when
3644 using -Bsymbolic. */
3648 relocation
= (htab
->elf
.splt
->output_section
->vma
3649 + htab
->elf
.splt
->output_offset
3651 unresolved_reloc
= FALSE
;
3658 && (input_section
->flags
& SEC_ALLOC
) != 0
3659 && (input_section
->flags
& SEC_READONLY
) != 0
3662 bfd_boolean fail
= FALSE
;
3664 = (r_type
== R_X86_64_PC32
3665 && is_32bit_relative_branch (contents
, rel
->r_offset
));
3667 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
3669 /* Symbol is referenced locally. Make sure it is
3670 defined locally or for a branch. */
3671 fail
= !h
->def_regular
&& !branch
;
3675 /* Symbol isn't referenced locally. We only allow
3676 branch to symbol with non-default visibility. */
3678 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
3685 const char *pic
= "";
3687 switch (ELF_ST_VISIBILITY (h
->other
))
3690 v
= _("hidden symbol");
3693 v
= _("internal symbol");
3696 v
= _("protected symbol");
3700 pic
= _("; recompile with -fPIC");
3705 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3707 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3709 (*_bfd_error_handler
) (fmt
, input_bfd
,
3710 x86_64_elf_howto_table
[r_type
].name
,
3711 v
, h
->root
.root
.string
, pic
);
3712 bfd_set_error (bfd_error_bad_value
);
3723 /* FIXME: The ABI says the linker should make sure the value is
3724 the same when it's zeroextended to 64 bit. */
3726 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3731 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3732 || h
->root
.type
!= bfd_link_hash_undefweak
)
3733 && (! IS_X86_64_PCREL_TYPE (r_type
)
3734 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
3735 || (ELIMINATE_COPY_RELOCS
3742 || h
->root
.type
== bfd_link_hash_undefweak
3743 || h
->root
.type
== bfd_link_hash_undefined
)))
3745 Elf_Internal_Rela outrel
;
3746 bfd_boolean skip
, relocate
;
3749 /* When generating a shared object, these relocations
3750 are copied into the output file to be resolved at run
3756 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3758 if (outrel
.r_offset
== (bfd_vma
) -1)
3760 else if (outrel
.r_offset
== (bfd_vma
) -2)
3761 skip
= TRUE
, relocate
= TRUE
;
3763 outrel
.r_offset
+= (input_section
->output_section
->vma
3764 + input_section
->output_offset
);
3767 memset (&outrel
, 0, sizeof outrel
);
3769 /* h->dynindx may be -1 if this symbol was marked to
3773 && (IS_X86_64_PCREL_TYPE (r_type
)
3775 || ! SYMBOLIC_BIND (info
, h
)
3776 || ! h
->def_regular
))
3778 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3779 outrel
.r_addend
= rel
->r_addend
;
3783 /* This symbol is local, or marked to become local. */
3784 if (r_type
== htab
->pointer_r_type
)
3787 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3788 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3790 else if (r_type
== R_X86_64_64
3791 && !ABI_64_P (output_bfd
))
3794 outrel
.r_info
= htab
->r_info (0,
3795 R_X86_64_RELATIVE64
);
3796 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3797 /* Check addend overflow. */
3798 if ((outrel
.r_addend
& 0x80000000)
3799 != (rel
->r_addend
& 0x80000000))
3802 int addend
= rel
->r_addend
;
3803 if (h
&& h
->root
.root
.string
)
3804 name
= h
->root
.root
.string
;
3806 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3809 (*_bfd_error_handler
)
3810 (_("%B: addend -0x%x in relocation %s against "
3811 "symbol `%s' at 0x%lx in section `%A' is "
3813 input_bfd
, input_section
, addend
,
3814 x86_64_elf_howto_table
[r_type
].name
,
3815 name
, (unsigned long) rel
->r_offset
);
3817 (*_bfd_error_handler
)
3818 (_("%B: addend 0x%x in relocation %s against "
3819 "symbol `%s' at 0x%lx in section `%A' is "
3821 input_bfd
, input_section
, addend
,
3822 x86_64_elf_howto_table
[r_type
].name
,
3823 name
, (unsigned long) rel
->r_offset
);
3824 bfd_set_error (bfd_error_bad_value
);
3832 if (bfd_is_abs_section (sec
))
3834 else if (sec
== NULL
|| sec
->owner
== NULL
)
3836 bfd_set_error (bfd_error_bad_value
);
3843 /* We are turning this relocation into one
3844 against a section symbol. It would be
3845 proper to subtract the symbol's value,
3846 osec->vma, from the emitted reloc addend,
3847 but ld.so expects buggy relocs. */
3848 osec
= sec
->output_section
;
3849 sindx
= elf_section_data (osec
)->dynindx
;
3852 asection
*oi
= htab
->elf
.text_index_section
;
3853 sindx
= elf_section_data (oi
)->dynindx
;
3855 BFD_ASSERT (sindx
!= 0);
3858 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3859 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3863 sreloc
= elf_section_data (input_section
)->sreloc
;
3865 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3867 r
= bfd_reloc_notsupported
;
3868 goto check_relocation_error
;
3871 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3873 /* If this reloc is against an external symbol, we do
3874 not want to fiddle with the addend. Otherwise, we
3875 need to include the symbol value so that it becomes
3876 an addend for the dynamic reloc. */
3883 case R_X86_64_TLSGD
:
3884 case R_X86_64_GOTPC32_TLSDESC
:
3885 case R_X86_64_TLSDESC_CALL
:
3886 case R_X86_64_GOTTPOFF
:
3887 tls_type
= GOT_UNKNOWN
;
3888 if (h
== NULL
&& local_got_offsets
)
3889 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
3891 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
3893 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3894 input_section
, contents
,
3895 symtab_hdr
, sym_hashes
,
3896 &r_type
, tls_type
, rel
,
3897 relend
, h
, r_symndx
))
3900 if (r_type
== R_X86_64_TPOFF32
)
3902 bfd_vma roff
= rel
->r_offset
;
3904 BFD_ASSERT (! unresolved_reloc
);
3906 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
3908 /* GD->LE transition. For 64bit, change
3909 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3910 .word 0x6666; rex64; call __tls_get_addr
3913 leaq foo@tpoff(%rax), %rax
3915 leaq foo@tlsgd(%rip), %rdi
3916 .word 0x6666; rex64; call __tls_get_addr
3919 leaq foo@tpoff(%rax), %rax */
3920 if (ABI_64_P (output_bfd
))
3921 memcpy (contents
+ roff
- 4,
3922 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3925 memcpy (contents
+ roff
- 3,
3926 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3928 bfd_put_32 (output_bfd
,
3929 elf_x86_64_tpoff (info
, relocation
),
3930 contents
+ roff
+ 8);
3931 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
3935 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
3937 /* GDesc -> LE transition.
3938 It's originally something like:
3939 leaq x@tlsdesc(%rip), %rax
3942 movl $x@tpoff, %rax. */
3944 unsigned int val
, type
;
3946 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3947 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3948 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
3949 contents
+ roff
- 3);
3950 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
3951 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3952 contents
+ roff
- 1);
3953 bfd_put_32 (output_bfd
,
3954 elf_x86_64_tpoff (info
, relocation
),
3958 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
3960 /* GDesc -> LE transition.
3965 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3966 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3969 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
3971 /* IE->LE transition:
3972 Originally it can be one of:
3973 movq foo@gottpoff(%rip), %reg
3974 addq foo@gottpoff(%rip), %reg
3977 leaq foo(%reg), %reg
3980 unsigned int val
, type
, reg
;
3982 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3983 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3984 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3990 bfd_put_8 (output_bfd
, 0x49,
3991 contents
+ roff
- 3);
3992 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3993 bfd_put_8 (output_bfd
, 0x41,
3994 contents
+ roff
- 3);
3995 bfd_put_8 (output_bfd
, 0xc7,
3996 contents
+ roff
- 2);
3997 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3998 contents
+ roff
- 1);
4002 /* addq -> addq - addressing with %rsp/%r12 is
4005 bfd_put_8 (output_bfd
, 0x49,
4006 contents
+ roff
- 3);
4007 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4008 bfd_put_8 (output_bfd
, 0x41,
4009 contents
+ roff
- 3);
4010 bfd_put_8 (output_bfd
, 0x81,
4011 contents
+ roff
- 2);
4012 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4013 contents
+ roff
- 1);
4019 bfd_put_8 (output_bfd
, 0x4d,
4020 contents
+ roff
- 3);
4021 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4022 bfd_put_8 (output_bfd
, 0x45,
4023 contents
+ roff
- 3);
4024 bfd_put_8 (output_bfd
, 0x8d,
4025 contents
+ roff
- 2);
4026 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4027 contents
+ roff
- 1);
4029 bfd_put_32 (output_bfd
,
4030 elf_x86_64_tpoff (info
, relocation
),
4038 if (htab
->elf
.sgot
== NULL
)
4043 off
= h
->got
.offset
;
4044 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4048 if (local_got_offsets
== NULL
)
4051 off
= local_got_offsets
[r_symndx
];
4052 offplt
= local_tlsdesc_gotents
[r_symndx
];
4059 Elf_Internal_Rela outrel
;
4063 if (htab
->elf
.srelgot
== NULL
)
4066 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4068 if (GOT_TLS_GDESC_P (tls_type
))
4070 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4071 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4072 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4073 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4074 + htab
->elf
.sgotplt
->output_offset
4076 + htab
->sgotplt_jump_table_size
);
4077 sreloc
= htab
->elf
.srelplt
;
4079 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4081 outrel
.r_addend
= 0;
4082 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4085 sreloc
= htab
->elf
.srelgot
;
4087 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4088 + htab
->elf
.sgot
->output_offset
+ off
);
4090 if (GOT_TLS_GD_P (tls_type
))
4091 dr_type
= R_X86_64_DTPMOD64
;
4092 else if (GOT_TLS_GDESC_P (tls_type
))
4095 dr_type
= R_X86_64_TPOFF64
;
4097 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4098 outrel
.r_addend
= 0;
4099 if ((dr_type
== R_X86_64_TPOFF64
4100 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4101 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4102 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4104 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4106 if (GOT_TLS_GD_P (tls_type
))
4110 BFD_ASSERT (! unresolved_reloc
);
4111 bfd_put_64 (output_bfd
,
4112 relocation
- elf_x86_64_dtpoff_base (info
),
4113 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4117 bfd_put_64 (output_bfd
, 0,
4118 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4119 outrel
.r_info
= htab
->r_info (indx
,
4121 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4122 elf_append_rela (output_bfd
, sreloc
,
4131 local_got_offsets
[r_symndx
] |= 1;
4134 if (off
>= (bfd_vma
) -2
4135 && ! GOT_TLS_GDESC_P (tls_type
))
4137 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4139 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4140 || r_type
== R_X86_64_TLSDESC_CALL
)
4141 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4142 + htab
->elf
.sgotplt
->output_offset
4143 + offplt
+ htab
->sgotplt_jump_table_size
;
4145 relocation
= htab
->elf
.sgot
->output_section
->vma
4146 + htab
->elf
.sgot
->output_offset
+ off
;
4147 unresolved_reloc
= FALSE
;
4151 bfd_vma roff
= rel
->r_offset
;
4153 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4155 /* GD->IE transition. For 64bit, change
4156 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4157 .word 0x6666; rex64; call __tls_get_addr@plt
4160 addq foo@gottpoff(%rip), %rax
4162 leaq foo@tlsgd(%rip), %rdi
4163 .word 0x6666; rex64; call __tls_get_addr@plt
4166 addq foo@gottpoff(%rip), %rax */
4167 if (ABI_64_P (output_bfd
))
4168 memcpy (contents
+ roff
- 4,
4169 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4172 memcpy (contents
+ roff
- 3,
4173 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4176 relocation
= (htab
->elf
.sgot
->output_section
->vma
4177 + htab
->elf
.sgot
->output_offset
+ off
4179 - input_section
->output_section
->vma
4180 - input_section
->output_offset
4182 bfd_put_32 (output_bfd
, relocation
,
4183 contents
+ roff
+ 8);
4184 /* Skip R_X86_64_PLT32. */
4188 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4190 /* GDesc -> IE transition.
4191 It's originally something like:
4192 leaq x@tlsdesc(%rip), %rax
4195 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4197 /* Now modify the instruction as appropriate. To
4198 turn a leaq into a movq in the form we use it, it
4199 suffices to change the second byte from 0x8d to
4201 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4203 bfd_put_32 (output_bfd
,
4204 htab
->elf
.sgot
->output_section
->vma
4205 + htab
->elf
.sgot
->output_offset
+ off
4207 - input_section
->output_section
->vma
4208 - input_section
->output_offset
4213 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4215 /* GDesc -> IE transition.
4222 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4223 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4231 case R_X86_64_TLSLD
:
4232 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4233 input_section
, contents
,
4234 symtab_hdr
, sym_hashes
,
4235 &r_type
, GOT_UNKNOWN
,
4236 rel
, relend
, h
, r_symndx
))
4239 if (r_type
!= R_X86_64_TLSLD
)
4241 /* LD->LE transition:
4242 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4243 For 64bit, we change it into:
4244 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4245 For 32bit, we change it into:
4246 nopl 0x0(%rax); movl %fs:0, %eax. */
4248 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4249 if (ABI_64_P (output_bfd
))
4250 memcpy (contents
+ rel
->r_offset
- 3,
4251 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4253 memcpy (contents
+ rel
->r_offset
- 3,
4254 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4255 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
4260 if (htab
->elf
.sgot
== NULL
)
4263 off
= htab
->tls_ld_got
.offset
;
4268 Elf_Internal_Rela outrel
;
4270 if (htab
->elf
.srelgot
== NULL
)
4273 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4274 + htab
->elf
.sgot
->output_offset
+ off
);
4276 bfd_put_64 (output_bfd
, 0,
4277 htab
->elf
.sgot
->contents
+ off
);
4278 bfd_put_64 (output_bfd
, 0,
4279 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4280 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4281 outrel
.r_addend
= 0;
4282 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4284 htab
->tls_ld_got
.offset
|= 1;
4286 relocation
= htab
->elf
.sgot
->output_section
->vma
4287 + htab
->elf
.sgot
->output_offset
+ off
;
4288 unresolved_reloc
= FALSE
;
4291 case R_X86_64_DTPOFF32
:
4292 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4293 relocation
-= elf_x86_64_dtpoff_base (info
);
4295 relocation
= elf_x86_64_tpoff (info
, relocation
);
4298 case R_X86_64_TPOFF32
:
4299 case R_X86_64_TPOFF64
:
4300 BFD_ASSERT (info
->executable
);
4301 relocation
= elf_x86_64_tpoff (info
, relocation
);
4308 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4309 because such sections are not SEC_ALLOC and thus ld.so will
4310 not process them. */
4311 if (unresolved_reloc
4312 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4314 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4315 rel
->r_offset
) != (bfd_vma
) -1)
4317 (*_bfd_error_handler
)
4318 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4321 (long) rel
->r_offset
,
4323 h
->root
.root
.string
);
4328 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4329 contents
, rel
->r_offset
,
4330 relocation
, rel
->r_addend
);
4332 check_relocation_error
:
4333 if (r
!= bfd_reloc_ok
)
4338 name
= h
->root
.root
.string
;
4341 name
= bfd_elf_string_from_elf_section (input_bfd
,
4342 symtab_hdr
->sh_link
,
4347 name
= bfd_section_name (input_bfd
, sec
);
4350 if (r
== bfd_reloc_overflow
)
4352 if (! ((*info
->callbacks
->reloc_overflow
)
4353 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4354 (bfd_vma
) 0, input_bfd
, input_section
,
4360 (*_bfd_error_handler
)
4361 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4362 input_bfd
, input_section
,
4363 (long) rel
->r_offset
, name
, (int) r
);
4372 /* Finish up dynamic symbol handling. We set the contents of various
4373 dynamic sections here. */
4376 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4377 struct bfd_link_info
*info
,
4378 struct elf_link_hash_entry
*h
,
4379 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4381 struct elf_x86_64_link_hash_table
*htab
;
4382 const struct elf_x86_64_backend_data
*const abed
4383 = get_elf_x86_64_backend_data (output_bfd
);
4385 htab
= elf_x86_64_hash_table (info
);
4389 if (h
->plt
.offset
!= (bfd_vma
) -1)
4393 Elf_Internal_Rela rela
;
4395 asection
*plt
, *gotplt
, *relplt
;
4396 const struct elf_backend_data
*bed
;
4398 /* When building a static executable, use .iplt, .igot.plt and
4399 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4400 if (htab
->elf
.splt
!= NULL
)
4402 plt
= htab
->elf
.splt
;
4403 gotplt
= htab
->elf
.sgotplt
;
4404 relplt
= htab
->elf
.srelplt
;
4408 plt
= htab
->elf
.iplt
;
4409 gotplt
= htab
->elf
.igotplt
;
4410 relplt
= htab
->elf
.irelplt
;
4413 /* This symbol has an entry in the procedure linkage table. Set
4415 if ((h
->dynindx
== -1
4416 && !((h
->forced_local
|| info
->executable
)
4418 && h
->type
== STT_GNU_IFUNC
))
4424 /* Get the index in the procedure linkage table which
4425 corresponds to this symbol. This is the index of this symbol
4426 in all the symbols for which we are making plt entries. The
4427 first entry in the procedure linkage table is reserved.
4429 Get the offset into the .got table of the entry that
4430 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4431 bytes. The first three are reserved for the dynamic linker.
4433 For static executables, we don't reserve anything. */
4435 if (plt
== htab
->elf
.splt
)
4437 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
4438 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4442 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
4443 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4446 /* Fill in the entry in the procedure linkage table. */
4447 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
4448 abed
->plt_entry_size
);
4450 /* Insert the relocation positions of the plt section. */
4452 /* Put offset the PC-relative instruction referring to the GOT entry,
4453 subtracting the size of that instruction. */
4454 bfd_put_32 (output_bfd
,
4455 (gotplt
->output_section
->vma
4456 + gotplt
->output_offset
4458 - plt
->output_section
->vma
4459 - plt
->output_offset
4461 - abed
->plt_got_insn_size
),
4462 plt
->contents
+ h
->plt
.offset
+ abed
->plt_got_offset
);
4464 /* Fill in the entry in the global offset table, initially this
4465 points to the second part of the PLT entry. */
4466 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4467 + plt
->output_offset
4468 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
4469 gotplt
->contents
+ got_offset
);
4471 /* Fill in the entry in the .rela.plt section. */
4472 rela
.r_offset
= (gotplt
->output_section
->vma
4473 + gotplt
->output_offset
4475 if (h
->dynindx
== -1
4476 || ((info
->executable
4477 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4479 && h
->type
== STT_GNU_IFUNC
))
4481 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4482 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4483 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4484 rela
.r_addend
= (h
->root
.u
.def
.value
4485 + h
->root
.u
.def
.section
->output_section
->vma
4486 + h
->root
.u
.def
.section
->output_offset
);
4487 /* R_X86_64_IRELATIVE comes last. */
4488 plt_index
= htab
->next_irelative_index
--;
4492 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4494 plt_index
= htab
->next_jump_slot_index
++;
4497 /* Don't fill PLT entry for static executables. */
4498 if (plt
== htab
->elf
.splt
)
4500 /* Put relocation index. */
4501 bfd_put_32 (output_bfd
, plt_index
,
4502 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
4503 /* Put offset for jmp .PLT0. */
4504 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ abed
->plt_plt_insn_end
),
4505 plt
->contents
+ h
->plt
.offset
+ abed
->plt_plt_offset
);
4508 bed
= get_elf_backend_data (output_bfd
);
4509 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4510 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4512 if (!h
->def_regular
)
4514 /* Mark the symbol as undefined, rather than as defined in
4515 the .plt section. Leave the value if there were any
4516 relocations where pointer equality matters (this is a clue
4517 for the dynamic linker, to make function pointer
4518 comparisons work between an application and shared
4519 library), otherwise set it to zero. If a function is only
4520 called from a binary, there is no need to slow down
4521 shared libraries because of that. */
4522 sym
->st_shndx
= SHN_UNDEF
;
4523 if (!h
->pointer_equality_needed
)
4528 if (h
->got
.offset
!= (bfd_vma
) -1
4529 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
4530 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
4532 Elf_Internal_Rela rela
;
4534 /* This symbol has an entry in the global offset table. Set it
4536 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4539 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4540 + htab
->elf
.sgot
->output_offset
4541 + (h
->got
.offset
&~ (bfd_vma
) 1));
4543 /* If this is a static link, or it is a -Bsymbolic link and the
4544 symbol is defined locally or was forced to be local because
4545 of a version file, we just want to emit a RELATIVE reloc.
4546 The entry in the global offset table will already have been
4547 initialized in the relocate_section function. */
4549 && h
->type
== STT_GNU_IFUNC
)
4553 /* Generate R_X86_64_GLOB_DAT. */
4560 if (!h
->pointer_equality_needed
)
4563 /* For non-shared object, we can't use .got.plt, which
4564 contains the real function addres if we need pointer
4565 equality. We load the GOT entry with the PLT entry. */
4566 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4567 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4568 + plt
->output_offset
4570 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4574 else if (info
->shared
4575 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4577 if (!h
->def_regular
)
4579 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4580 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4581 rela
.r_addend
= (h
->root
.u
.def
.value
4582 + h
->root
.u
.def
.section
->output_section
->vma
4583 + h
->root
.u
.def
.section
->output_offset
);
4587 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4589 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4590 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4591 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4595 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
4600 Elf_Internal_Rela rela
;
4602 /* This symbol needs a copy reloc. Set it up. */
4604 if (h
->dynindx
== -1
4605 || (h
->root
.type
!= bfd_link_hash_defined
4606 && h
->root
.type
!= bfd_link_hash_defweak
)
4607 || htab
->srelbss
== NULL
)
4610 rela
.r_offset
= (h
->root
.u
.def
.value
4611 + h
->root
.u
.def
.section
->output_section
->vma
4612 + h
->root
.u
.def
.section
->output_offset
);
4613 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4615 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
4621 /* Finish up local dynamic symbol handling. We set the contents of
4622 various dynamic sections here. */
4625 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4627 struct elf_link_hash_entry
*h
4628 = (struct elf_link_hash_entry
*) *slot
;
4629 struct bfd_link_info
*info
4630 = (struct bfd_link_info
*) inf
;
4632 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4636 /* Used to decide how to sort relocs in an optimal manner for the
4637 dynamic linker, before writing them out. */
4639 static enum elf_reloc_type_class
4640 elf_x86_64_reloc_type_class (const Elf_Internal_Rela
*rela
)
4642 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4644 case R_X86_64_RELATIVE
:
4645 case R_X86_64_RELATIVE64
:
4646 return reloc_class_relative
;
4647 case R_X86_64_JUMP_SLOT
:
4648 return reloc_class_plt
;
4650 return reloc_class_copy
;
4652 return reloc_class_normal
;
4656 /* Finish up the dynamic sections. */
4659 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4660 struct bfd_link_info
*info
)
4662 struct elf_x86_64_link_hash_table
*htab
;
4665 const struct elf_x86_64_backend_data
*const abed
4666 = get_elf_x86_64_backend_data (output_bfd
);
4668 htab
= elf_x86_64_hash_table (info
);
4672 dynobj
= htab
->elf
.dynobj
;
4673 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4675 if (htab
->elf
.dynamic_sections_created
)
4677 bfd_byte
*dyncon
, *dynconend
;
4678 const struct elf_backend_data
*bed
;
4679 bfd_size_type sizeof_dyn
;
4681 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4684 bed
= get_elf_backend_data (dynobj
);
4685 sizeof_dyn
= bed
->s
->sizeof_dyn
;
4686 dyncon
= sdyn
->contents
;
4687 dynconend
= sdyn
->contents
+ sdyn
->size
;
4688 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
4690 Elf_Internal_Dyn dyn
;
4693 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
4701 s
= htab
->elf
.sgotplt
;
4702 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4706 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
4710 s
= htab
->elf
.srelplt
->output_section
;
4711 dyn
.d_un
.d_val
= s
->size
;
4715 /* The procedure linkage table relocs (DT_JMPREL) should
4716 not be included in the overall relocs (DT_RELA).
4717 Therefore, we override the DT_RELASZ entry here to
4718 make it not include the JMPREL relocs. Since the
4719 linker script arranges for .rela.plt to follow all
4720 other relocation sections, we don't have to worry
4721 about changing the DT_RELA entry. */
4722 if (htab
->elf
.srelplt
!= NULL
)
4724 s
= htab
->elf
.srelplt
->output_section
;
4725 dyn
.d_un
.d_val
-= s
->size
;
4729 case DT_TLSDESC_PLT
:
4731 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4732 + htab
->tlsdesc_plt
;
4735 case DT_TLSDESC_GOT
:
4737 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4738 + htab
->tlsdesc_got
;
4742 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
4745 /* Fill in the special first entry in the procedure linkage table. */
4746 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4748 /* Fill in the first entry in the procedure linkage table. */
4749 memcpy (htab
->elf
.splt
->contents
,
4750 abed
->plt0_entry
, abed
->plt_entry_size
);
4751 /* Add offset for pushq GOT+8(%rip), since the instruction
4752 uses 6 bytes subtract this value. */
4753 bfd_put_32 (output_bfd
,
4754 (htab
->elf
.sgotplt
->output_section
->vma
4755 + htab
->elf
.sgotplt
->output_offset
4757 - htab
->elf
.splt
->output_section
->vma
4758 - htab
->elf
.splt
->output_offset
4760 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
4761 /* Add offset for the PC-relative instruction accessing GOT+16,
4762 subtracting the offset to the end of that instruction. */
4763 bfd_put_32 (output_bfd
,
4764 (htab
->elf
.sgotplt
->output_section
->vma
4765 + htab
->elf
.sgotplt
->output_offset
4767 - htab
->elf
.splt
->output_section
->vma
4768 - htab
->elf
.splt
->output_offset
4769 - abed
->plt0_got2_insn_end
),
4770 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
4772 elf_section_data (htab
->elf
.splt
->output_section
)
4773 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
4775 if (htab
->tlsdesc_plt
)
4777 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4778 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
4780 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
4781 abed
->plt0_entry
, abed
->plt_entry_size
);
4783 /* Add offset for pushq GOT+8(%rip), since the
4784 instruction uses 6 bytes subtract this value. */
4785 bfd_put_32 (output_bfd
,
4786 (htab
->elf
.sgotplt
->output_section
->vma
4787 + htab
->elf
.sgotplt
->output_offset
4789 - htab
->elf
.splt
->output_section
->vma
4790 - htab
->elf
.splt
->output_offset
4793 htab
->elf
.splt
->contents
4794 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
4795 /* Add offset for the PC-relative instruction accessing GOT+TDG,
4796 where TGD stands for htab->tlsdesc_got, subtracting the offset
4797 to the end of that instruction. */
4798 bfd_put_32 (output_bfd
,
4799 (htab
->elf
.sgot
->output_section
->vma
4800 + htab
->elf
.sgot
->output_offset
4802 - htab
->elf
.splt
->output_section
->vma
4803 - htab
->elf
.splt
->output_offset
4805 - abed
->plt0_got2_insn_end
),
4806 htab
->elf
.splt
->contents
4807 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
4812 if (htab
->elf
.sgotplt
)
4814 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4816 (*_bfd_error_handler
)
4817 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4821 /* Fill in the first three entries in the global offset table. */
4822 if (htab
->elf
.sgotplt
->size
> 0)
4824 /* Set the first entry in the global offset table to the address of
4825 the dynamic section. */
4827 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
4829 bfd_put_64 (output_bfd
,
4830 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
4831 htab
->elf
.sgotplt
->contents
);
4832 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4833 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
4834 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
4837 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
4841 /* Adjust .eh_frame for .plt section. */
4842 if (htab
->plt_eh_frame
!= NULL
4843 && htab
->plt_eh_frame
->contents
!= NULL
)
4845 if (htab
->elf
.splt
!= NULL
4846 && htab
->elf
.splt
->size
!= 0
4847 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4848 && htab
->elf
.splt
->output_section
!= NULL
4849 && htab
->plt_eh_frame
->output_section
!= NULL
)
4851 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4852 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4853 + htab
->plt_eh_frame
->output_offset
4854 + PLT_FDE_START_OFFSET
;
4855 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4856 htab
->plt_eh_frame
->contents
4857 + PLT_FDE_START_OFFSET
);
4859 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4861 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4863 htab
->plt_eh_frame
->contents
))
4868 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4869 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
4872 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4873 htab_traverse (htab
->loc_hash_table
,
4874 elf_x86_64_finish_local_dynamic_symbol
,
4880 /* Return address for Ith PLT stub in section PLT, for relocation REL
4881 or (bfd_vma) -1 if it should not be included. */
4884 elf_x86_64_plt_sym_val (bfd_vma i
, const asection
*plt
,
4885 const arelent
*rel ATTRIBUTE_UNUSED
)
4887 return plt
->vma
+ (i
+ 1) * GET_PLT_ENTRY_SIZE (plt
->owner
);
4890 /* Handle an x86-64 specific section when reading an object file. This
4891 is called when elfcode.h finds a section with an unknown type. */
4894 elf_x86_64_section_from_shdr (bfd
*abfd
,
4895 Elf_Internal_Shdr
*hdr
,
4899 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4902 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4908 /* Hook called by the linker routine which adds symbols from an object
4909 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4913 elf_x86_64_add_symbol_hook (bfd
*abfd
,
4914 struct bfd_link_info
*info
,
4915 Elf_Internal_Sym
*sym
,
4916 const char **namep ATTRIBUTE_UNUSED
,
4917 flagword
*flagsp ATTRIBUTE_UNUSED
,
4923 switch (sym
->st_shndx
)
4925 case SHN_X86_64_LCOMMON
:
4926 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
4929 lcomm
= bfd_make_section_with_flags (abfd
,
4933 | SEC_LINKER_CREATED
));
4936 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
4939 *valp
= sym
->st_size
;
4943 if ((abfd
->flags
& DYNAMIC
) == 0
4944 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
4945 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
4946 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
4952 /* Given a BFD section, try to locate the corresponding ELF section
4956 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
4957 asection
*sec
, int *index_return
)
4959 if (sec
== &_bfd_elf_large_com_section
)
4961 *index_return
= SHN_X86_64_LCOMMON
;
4967 /* Process a symbol. */
4970 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
4973 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
4975 switch (elfsym
->internal_elf_sym
.st_shndx
)
4977 case SHN_X86_64_LCOMMON
:
4978 asym
->section
= &_bfd_elf_large_com_section
;
4979 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
4980 /* Common symbol doesn't set BSF_GLOBAL. */
4981 asym
->flags
&= ~BSF_GLOBAL
;
4987 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
4989 return (sym
->st_shndx
== SHN_COMMON
4990 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
4994 elf_x86_64_common_section_index (asection
*sec
)
4996 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
4999 return SHN_X86_64_LCOMMON
;
5003 elf_x86_64_common_section (asection
*sec
)
5005 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5006 return bfd_com_section_ptr
;
5008 return &_bfd_elf_large_com_section
;
5012 elf_x86_64_merge_symbol (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5013 struct elf_link_hash_entry
**sym_hash ATTRIBUTE_UNUSED
,
5014 struct elf_link_hash_entry
*h
,
5015 Elf_Internal_Sym
*sym
,
5017 bfd_vma
*pvalue ATTRIBUTE_UNUSED
,
5018 unsigned int *pold_alignment ATTRIBUTE_UNUSED
,
5019 bfd_boolean
*skip ATTRIBUTE_UNUSED
,
5020 bfd_boolean
*override ATTRIBUTE_UNUSED
,
5021 bfd_boolean
*type_change_ok ATTRIBUTE_UNUSED
,
5022 bfd_boolean
*size_change_ok ATTRIBUTE_UNUSED
,
5023 bfd_boolean
*newdyn ATTRIBUTE_UNUSED
,
5024 bfd_boolean
*newdef
,
5025 bfd_boolean
*newdyncommon ATTRIBUTE_UNUSED
,
5026 bfd_boolean
*newweak ATTRIBUTE_UNUSED
,
5027 bfd
*abfd ATTRIBUTE_UNUSED
,
5029 bfd_boolean
*olddyn ATTRIBUTE_UNUSED
,
5030 bfd_boolean
*olddef
,
5031 bfd_boolean
*olddyncommon ATTRIBUTE_UNUSED
,
5032 bfd_boolean
*oldweak ATTRIBUTE_UNUSED
,
5036 /* A normal common symbol and a large common symbol result in a
5037 normal common symbol. We turn the large common symbol into a
5040 && h
->root
.type
== bfd_link_hash_common
5042 && bfd_is_com_section (*sec
)
5045 if (sym
->st_shndx
== SHN_COMMON
5046 && (elf_section_flags (*oldsec
) & SHF_X86_64_LARGE
) != 0)
5048 h
->root
.u
.c
.p
->section
5049 = bfd_make_section_old_way (oldbfd
, "COMMON");
5050 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5052 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5053 && (elf_section_flags (*oldsec
) & SHF_X86_64_LARGE
) == 0)
5054 *psec
= *sec
= bfd_com_section_ptr
;
5061 elf_x86_64_additional_program_headers (bfd
*abfd
,
5062 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5067 /* Check to see if we need a large readonly segment. */
5068 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5069 if (s
&& (s
->flags
& SEC_LOAD
))
5072 /* Check to see if we need a large data segment. Since .lbss sections
5073 is placed right after the .bss section, there should be no need for
5074 a large data segment just because of .lbss. */
5075 s
= bfd_get_section_by_name (abfd
, ".ldata");
5076 if (s
&& (s
->flags
& SEC_LOAD
))
5082 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5085 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5087 if (h
->plt
.offset
!= (bfd_vma
) -1
5089 && !h
->pointer_equality_needed
)
5092 return _bfd_elf_hash_symbol (h
);
5095 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5098 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5099 const bfd_target
*output
)
5101 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5102 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5103 && _bfd_elf_relocs_compatible (input
, output
));
5106 static const struct bfd_elf_special_section
5107 elf_x86_64_special_sections
[]=
5109 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5110 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5111 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5112 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5113 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5114 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5115 { NULL
, 0, 0, 0, 0 }
5118 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
5119 #define TARGET_LITTLE_NAME "elf64-x86-64"
5120 #define ELF_ARCH bfd_arch_i386
5121 #define ELF_TARGET_ID X86_64_ELF_DATA
5122 #define ELF_MACHINE_CODE EM_X86_64
5123 #define ELF_MAXPAGESIZE 0x200000
5124 #define ELF_MINPAGESIZE 0x1000
5125 #define ELF_COMMONPAGESIZE 0x1000
5127 #define elf_backend_can_gc_sections 1
5128 #define elf_backend_can_refcount 1
5129 #define elf_backend_want_got_plt 1
5130 #define elf_backend_plt_readonly 1
5131 #define elf_backend_want_plt_sym 0
5132 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5133 #define elf_backend_rela_normal 1
5134 #define elf_backend_plt_alignment 4
5136 #define elf_info_to_howto elf_x86_64_info_to_howto
5138 #define bfd_elf64_bfd_link_hash_table_create \
5139 elf_x86_64_link_hash_table_create
5140 #define bfd_elf64_bfd_link_hash_table_free \
5141 elf_x86_64_link_hash_table_free
5142 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5143 #define bfd_elf64_bfd_reloc_name_lookup \
5144 elf_x86_64_reloc_name_lookup
5146 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5147 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5148 #define elf_backend_check_relocs elf_x86_64_check_relocs
5149 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5150 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5151 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5152 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5153 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5154 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5155 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5156 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5158 #define elf_backend_write_core_note elf_x86_64_write_core_note
5160 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5161 #define elf_backend_relocate_section elf_x86_64_relocate_section
5162 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5163 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5164 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5165 #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
5166 #define elf_backend_object_p elf64_x86_64_elf_object_p
5167 #define bfd_elf64_mkobject elf_x86_64_mkobject
5169 #define elf_backend_section_from_shdr \
5170 elf_x86_64_section_from_shdr
5172 #define elf_backend_section_from_bfd_section \
5173 elf_x86_64_elf_section_from_bfd_section
5174 #define elf_backend_add_symbol_hook \
5175 elf_x86_64_add_symbol_hook
5176 #define elf_backend_symbol_processing \
5177 elf_x86_64_symbol_processing
5178 #define elf_backend_common_section_index \
5179 elf_x86_64_common_section_index
5180 #define elf_backend_common_section \
5181 elf_x86_64_common_section
5182 #define elf_backend_common_definition \
5183 elf_x86_64_common_definition
5184 #define elf_backend_merge_symbol \
5185 elf_x86_64_merge_symbol
5186 #define elf_backend_special_sections \
5187 elf_x86_64_special_sections
5188 #define elf_backend_additional_program_headers \
5189 elf_x86_64_additional_program_headers
5190 #define elf_backend_hash_symbol \
5191 elf_x86_64_hash_symbol
5193 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5195 #include "elf64-target.h"
5197 /* FreeBSD support. */
5199 #undef TARGET_LITTLE_SYM
5200 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
5201 #undef TARGET_LITTLE_NAME
5202 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5205 #define ELF_OSABI ELFOSABI_FREEBSD
5208 #define elf64_bed elf64_x86_64_fbsd_bed
5210 #include "elf64-target.h"
5212 /* Solaris 2 support. */
5214 #undef TARGET_LITTLE_SYM
5215 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
5216 #undef TARGET_LITTLE_NAME
5217 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5219 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5220 objects won't be recognized. */
5224 #define elf64_bed elf64_x86_64_sol2_bed
5226 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5228 #undef elf_backend_static_tls_alignment
5229 #define elf_backend_static_tls_alignment 16
5231 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5233 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5235 #undef elf_backend_want_plt_sym
5236 #define elf_backend_want_plt_sym 1
5238 #include "elf64-target.h"
5240 /* Native Client support. */
5242 #undef TARGET_LITTLE_SYM
5243 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
5244 #undef TARGET_LITTLE_NAME
5245 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5247 #define elf64_bed elf64_x86_64_nacl_bed
5249 #undef ELF_MAXPAGESIZE
5250 #undef ELF_MINPAGESIZE
5251 #undef ELF_COMMONPAGESIZE
5252 #define ELF_MAXPAGESIZE 0x10000
5253 #define ELF_MINPAGESIZE 0x10000
5254 #define ELF_COMMONPAGESIZE 0x10000
5256 /* Restore defaults. */
5258 #undef elf_backend_static_tls_alignment
5259 #undef elf_backend_want_plt_sym
5260 #define elf_backend_want_plt_sym 0
5262 /* NaCl uses substantially different PLT entries for the same effects. */
5264 #undef elf_backend_plt_alignment
5265 #define elf_backend_plt_alignment 5
5266 #define NACL_PLT_ENTRY_SIZE 64
5267 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5269 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
5271 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5272 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5273 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5274 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5275 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5277 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5278 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */
5280 /* 32 bytes of nop to pad out to the standard size. */
5281 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5282 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5283 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5284 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5285 0x66, /* excess data32 prefix */
5289 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5291 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5292 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5293 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5294 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5296 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5297 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5298 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5300 /* Lazy GOT entries point here (32-byte aligned). */
5301 0x68, /* pushq immediate */
5302 0, 0, 0, 0, /* replaced with index into relocation table. */
5303 0xe9, /* jmp relative */
5304 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5306 /* 22 bytes of nop to pad out to the standard size. */
5307 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5308 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5309 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5312 /* .eh_frame covering the .plt section. */
5314 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
5316 #if (PLT_CIE_LENGTH != 20 \
5317 || PLT_FDE_LENGTH != 36 \
5318 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5319 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5320 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5322 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5323 0, 0, 0, 0, /* CIE ID */
5324 1, /* CIE version */
5325 'z', 'R', 0, /* Augmentation string */
5326 1, /* Code alignment factor */
5327 0x78, /* Data alignment factor */
5328 16, /* Return address column */
5329 1, /* Augmentation size */
5330 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5331 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5332 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5333 DW_CFA_nop
, DW_CFA_nop
,
5335 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5336 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
5337 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5338 0, 0, 0, 0, /* .plt size goes here */
5339 0, /* Augmentation size */
5340 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
5341 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5342 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
5343 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5344 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5345 13, /* Block length */
5346 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
5347 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
5348 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5349 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
5350 DW_CFA_nop
, DW_CFA_nop
5353 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
5355 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
5356 elf_x86_64_nacl_plt_entry
, /* plt_entry */
5357 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5358 2, /* plt0_got1_offset */
5359 9, /* plt0_got2_offset */
5360 13, /* plt0_got2_insn_end */
5361 3, /* plt_got_offset */
5362 33, /* plt_reloc_offset */
5363 38, /* plt_plt_offset */
5364 7, /* plt_got_insn_size */
5365 42, /* plt_plt_insn_end */
5366 32, /* plt_lazy_offset */
5367 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
5368 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
5371 #undef elf_backend_arch_data
5372 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5374 #undef elf_backend_modify_segment_map
5375 #define elf_backend_modify_segment_map nacl_modify_segment_map
5376 #undef elf_backend_modify_program_headers
5377 #define elf_backend_modify_program_headers nacl_modify_program_headers
5379 #include "elf64-target.h"
5381 /* Native Client x32 support. */
5383 #undef TARGET_LITTLE_SYM
5384 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
5385 #undef TARGET_LITTLE_NAME
5386 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5388 #define elf32_bed elf32_x86_64_nacl_bed
5390 #define bfd_elf32_bfd_link_hash_table_create \
5391 elf_x86_64_link_hash_table_create
5392 #define bfd_elf32_bfd_link_hash_table_free \
5393 elf_x86_64_link_hash_table_free
5394 #define bfd_elf32_bfd_reloc_type_lookup \
5395 elf_x86_64_reloc_type_lookup
5396 #define bfd_elf32_bfd_reloc_name_lookup \
5397 elf_x86_64_reloc_name_lookup
5398 #define bfd_elf32_mkobject \
5401 #undef elf_backend_object_p
5402 #define elf_backend_object_p \
5403 elf32_x86_64_elf_object_p
5405 #undef elf_backend_bfd_from_remote_memory
5406 #define elf_backend_bfd_from_remote_memory \
5407 _bfd_elf32_bfd_from_remote_memory
5409 #undef elf_backend_size_info
5410 #define elf_backend_size_info \
5411 _bfd_elf32_size_info
5413 #include "elf32-target.h"
5415 /* Restore defaults. */
5416 #undef elf_backend_object_p
5417 #define elf_backend_object_p elf64_x86_64_elf_object_p
5418 #undef elf_backend_bfd_from_remote_memory
5419 #undef elf_backend_size_info
5420 #undef elf_backend_modify_segment_map
5421 #undef elf_backend_modify_program_headers
5423 /* Intel L1OM support. */
5426 elf64_l1om_elf_object_p (bfd
*abfd
)
5428 /* Set the right machine number for an L1OM elf64 file. */
5429 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5433 #undef TARGET_LITTLE_SYM
5434 #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5435 #undef TARGET_LITTLE_NAME
5436 #define TARGET_LITTLE_NAME "elf64-l1om"
5438 #define ELF_ARCH bfd_arch_l1om
5440 #undef ELF_MACHINE_CODE
5441 #define ELF_MACHINE_CODE EM_L1OM
5446 #define elf64_bed elf64_l1om_bed
5448 #undef elf_backend_object_p
5449 #define elf_backend_object_p elf64_l1om_elf_object_p
5451 /* Restore defaults. */
5452 #undef ELF_MAXPAGESIZE
5453 #undef ELF_MINPAGESIZE
5454 #undef ELF_COMMONPAGESIZE
5455 #define ELF_MAXPAGESIZE 0x200000
5456 #define ELF_MINPAGESIZE 0x1000
5457 #define ELF_COMMONPAGESIZE 0x1000
5458 #undef elf_backend_plt_alignment
5459 #define elf_backend_plt_alignment 4
5460 #undef elf_backend_arch_data
5461 #define elf_backend_arch_data &elf_x86_64_arch_bed
5463 #include "elf64-target.h"
5465 /* FreeBSD L1OM support. */
5467 #undef TARGET_LITTLE_SYM
5468 #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5469 #undef TARGET_LITTLE_NAME
5470 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5473 #define ELF_OSABI ELFOSABI_FREEBSD
5476 #define elf64_bed elf64_l1om_fbsd_bed
5478 #include "elf64-target.h"
5480 /* Intel K1OM support. */
5483 elf64_k1om_elf_object_p (bfd
*abfd
)
5485 /* Set the right machine number for an K1OM elf64 file. */
5486 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5490 #undef TARGET_LITTLE_SYM
5491 #define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
5492 #undef TARGET_LITTLE_NAME
5493 #define TARGET_LITTLE_NAME "elf64-k1om"
5495 #define ELF_ARCH bfd_arch_k1om
5497 #undef ELF_MACHINE_CODE
5498 #define ELF_MACHINE_CODE EM_K1OM
5503 #define elf64_bed elf64_k1om_bed
5505 #undef elf_backend_object_p
5506 #define elf_backend_object_p elf64_k1om_elf_object_p
5508 #undef elf_backend_static_tls_alignment
5510 #undef elf_backend_want_plt_sym
5511 #define elf_backend_want_plt_sym 0
5513 #include "elf64-target.h"
5515 /* FreeBSD K1OM support. */
5517 #undef TARGET_LITTLE_SYM
5518 #define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
5519 #undef TARGET_LITTLE_NAME
5520 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5523 #define ELF_OSABI ELFOSABI_FREEBSD
5526 #define elf64_bed elf64_k1om_fbsd_bed
5528 #include "elf64-target.h"
5530 /* 32bit x86-64 support. */
5532 #undef TARGET_LITTLE_SYM
5533 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5534 #undef TARGET_LITTLE_NAME
5535 #define TARGET_LITTLE_NAME "elf32-x86-64"
5539 #define ELF_ARCH bfd_arch_i386
5541 #undef ELF_MACHINE_CODE
5542 #define ELF_MACHINE_CODE EM_X86_64
5546 #undef elf_backend_object_p
5547 #define elf_backend_object_p \
5548 elf32_x86_64_elf_object_p
5550 #undef elf_backend_bfd_from_remote_memory
5551 #define elf_backend_bfd_from_remote_memory \
5552 _bfd_elf32_bfd_from_remote_memory
5554 #undef elf_backend_size_info
5555 #define elf_backend_size_info \
5556 _bfd_elf32_size_info
5558 #include "elf32-target.h"