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 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1526 it here if it is defined in a non-shared object. */
1527 if (h
->type
== STT_GNU_IFUNC
1530 /* It is referenced by a non-shared object. */
1534 /* STT_GNU_IFUNC symbol must go through PLT. */
1535 h
->plt
.refcount
+= 1;
1537 /* STT_GNU_IFUNC needs dynamic sections. */
1538 if (htab
->elf
.dynobj
== NULL
)
1539 htab
->elf
.dynobj
= abfd
;
1544 if (h
->root
.root
.string
)
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 STT_GNU_IFUNC "
1551 "symbol `%s' isn't handled by %s"), abfd
,
1552 x86_64_elf_howto_table
[r_type
].name
,
1553 name
, __FUNCTION__
);
1554 bfd_set_error (bfd_error_bad_value
);
1558 if (ABI_64_P (abfd
))
1562 h
->pointer_equality_needed
= 1;
1565 /* We must copy these reloc types into the output
1566 file. Create a reloc section in dynobj and
1567 make room for this reloc. */
1568 sreloc
= _bfd_elf_create_ifunc_dyn_reloc
1569 (abfd
, info
, sec
, sreloc
,
1570 &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
);
1581 if (r_type
!= R_X86_64_PC32
1582 && r_type
!= R_X86_64_PC64
)
1583 h
->pointer_equality_needed
= 1;
1586 case R_X86_64_PLT32
:
1589 case R_X86_64_GOTPCREL
:
1590 case R_X86_64_GOTPCREL64
:
1591 h
->got
.refcount
+= 1;
1592 if (htab
->elf
.sgot
== NULL
1593 && !_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1603 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1604 symtab_hdr
, sym_hashes
,
1605 &r_type
, GOT_UNKNOWN
,
1606 rel
, rel_end
, h
, r_symndx
))
1611 case R_X86_64_TLSLD
:
1612 htab
->tls_ld_got
.refcount
+= 1;
1615 case R_X86_64_TPOFF32
:
1616 if (!info
->executable
&& ABI_64_P (abfd
))
1619 name
= h
->root
.root
.string
;
1621 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1623 (*_bfd_error_handler
)
1624 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1626 x86_64_elf_howto_table
[r_type
].name
, name
);
1627 bfd_set_error (bfd_error_bad_value
);
1632 case R_X86_64_GOTTPOFF
:
1633 if (!info
->executable
)
1634 info
->flags
|= DF_STATIC_TLS
;
1637 case R_X86_64_GOT32
:
1638 case R_X86_64_GOTPCREL
:
1639 case R_X86_64_TLSGD
:
1640 case R_X86_64_GOT64
:
1641 case R_X86_64_GOTPCREL64
:
1642 case R_X86_64_GOTPLT64
:
1643 case R_X86_64_GOTPC32_TLSDESC
:
1644 case R_X86_64_TLSDESC_CALL
:
1645 /* This symbol requires a global offset table entry. */
1647 int tls_type
, old_tls_type
;
1651 default: tls_type
= GOT_NORMAL
; break;
1652 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1653 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1654 case R_X86_64_GOTPC32_TLSDESC
:
1655 case R_X86_64_TLSDESC_CALL
:
1656 tls_type
= GOT_TLS_GDESC
; break;
1661 if (r_type
== R_X86_64_GOTPLT64
)
1663 /* This relocation indicates that we also need
1664 a PLT entry, as this is a function. We don't need
1665 a PLT entry for local symbols. */
1667 h
->plt
.refcount
+= 1;
1669 h
->got
.refcount
+= 1;
1670 old_tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
1674 bfd_signed_vma
*local_got_refcounts
;
1676 /* This is a global offset table entry for a local symbol. */
1677 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1678 if (local_got_refcounts
== NULL
)
1682 size
= symtab_hdr
->sh_info
;
1683 size
*= sizeof (bfd_signed_vma
)
1684 + sizeof (bfd_vma
) + sizeof (char);
1685 local_got_refcounts
= ((bfd_signed_vma
*)
1686 bfd_zalloc (abfd
, size
));
1687 if (local_got_refcounts
== NULL
)
1689 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1690 elf_x86_64_local_tlsdesc_gotent (abfd
)
1691 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1692 elf_x86_64_local_got_tls_type (abfd
)
1693 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1695 local_got_refcounts
[r_symndx
] += 1;
1697 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1700 /* If a TLS symbol is accessed using IE at least once,
1701 there is no point to use dynamic model for it. */
1702 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1703 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1704 || tls_type
!= GOT_TLS_IE
))
1706 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1707 tls_type
= old_tls_type
;
1708 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1709 && GOT_TLS_GD_ANY_P (tls_type
))
1710 tls_type
|= old_tls_type
;
1714 name
= h
->root
.root
.string
;
1716 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1718 (*_bfd_error_handler
)
1719 (_("%B: '%s' accessed both as normal and thread local symbol"),
1725 if (old_tls_type
!= tls_type
)
1728 elf_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1730 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1735 case R_X86_64_GOTOFF64
:
1736 case R_X86_64_GOTPC32
:
1737 case R_X86_64_GOTPC64
:
1739 if (htab
->elf
.sgot
== NULL
)
1741 if (htab
->elf
.dynobj
== NULL
)
1742 htab
->elf
.dynobj
= abfd
;
1743 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1749 case R_X86_64_PLT32
:
1750 /* This symbol requires a procedure linkage table entry. We
1751 actually build the entry in adjust_dynamic_symbol,
1752 because this might be a case of linking PIC code which is
1753 never referenced by a dynamic object, in which case we
1754 don't need to generate a procedure linkage table entry
1757 /* If this is a local symbol, we resolve it directly without
1758 creating a procedure linkage table entry. */
1763 h
->plt
.refcount
+= 1;
1766 case R_X86_64_PLTOFF64
:
1767 /* This tries to form the 'address' of a function relative
1768 to GOT. For global symbols we need a PLT entry. */
1772 h
->plt
.refcount
+= 1;
1777 if (!ABI_64_P (abfd
))
1782 /* Let's help debug shared library creation. These relocs
1783 cannot be used in shared libs. Don't error out for
1784 sections we don't care about, such as debug sections or
1785 non-constant sections. */
1787 && (sec
->flags
& SEC_ALLOC
) != 0
1788 && (sec
->flags
& SEC_READONLY
) != 0)
1791 name
= h
->root
.root
.string
;
1793 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1794 (*_bfd_error_handler
)
1795 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1796 abfd
, x86_64_elf_howto_table
[r_type
].name
, name
);
1797 bfd_set_error (bfd_error_bad_value
);
1808 if (h
!= NULL
&& info
->executable
)
1810 /* If this reloc is in a read-only section, we might
1811 need a copy reloc. We can't check reliably at this
1812 stage whether the section is read-only, as input
1813 sections have not yet been mapped to output sections.
1814 Tentatively set the flag for now, and correct in
1815 adjust_dynamic_symbol. */
1818 /* We may need a .plt entry if the function this reloc
1819 refers to is in a shared lib. */
1820 h
->plt
.refcount
+= 1;
1821 if (r_type
!= R_X86_64_PC32
&& r_type
!= R_X86_64_PC64
)
1822 h
->pointer_equality_needed
= 1;
1825 /* If we are creating a shared library, and this is a reloc
1826 against a global symbol, or a non PC relative reloc
1827 against a local symbol, then we need to copy the reloc
1828 into the shared library. However, if we are linking with
1829 -Bsymbolic, we do not need to copy a reloc against a
1830 global symbol which is defined in an object we are
1831 including in the link (i.e., DEF_REGULAR is set). At
1832 this point we have not seen all the input files, so it is
1833 possible that DEF_REGULAR is not set now but will be set
1834 later (it is never cleared). In case of a weak definition,
1835 DEF_REGULAR may be cleared later by a strong definition in
1836 a shared library. We account for that possibility below by
1837 storing information in the relocs_copied field of the hash
1838 table entry. A similar situation occurs when creating
1839 shared libraries and symbol visibility changes render the
1842 If on the other hand, we are creating an executable, we
1843 may need to keep relocations for symbols satisfied by a
1844 dynamic library if we manage to avoid copy relocs for the
1847 && (sec
->flags
& SEC_ALLOC
) != 0
1848 && (! IS_X86_64_PCREL_TYPE (r_type
)
1850 && (! SYMBOLIC_BIND (info
, h
)
1851 || h
->root
.type
== bfd_link_hash_defweak
1852 || !h
->def_regular
))))
1853 || (ELIMINATE_COPY_RELOCS
1855 && (sec
->flags
& SEC_ALLOC
) != 0
1857 && (h
->root
.type
== bfd_link_hash_defweak
1858 || !h
->def_regular
)))
1860 struct elf_dyn_relocs
*p
;
1861 struct elf_dyn_relocs
**head
;
1863 /* We must copy these reloc types into the output file.
1864 Create a reloc section in dynobj and make room for
1868 if (htab
->elf
.dynobj
== NULL
)
1869 htab
->elf
.dynobj
= abfd
;
1871 sreloc
= _bfd_elf_make_dynamic_reloc_section
1872 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
1873 abfd
, /*rela?*/ TRUE
);
1879 /* If this is a global symbol, we count the number of
1880 relocations we need for this symbol. */
1883 head
= &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
1887 /* Track dynamic relocs needed for local syms too.
1888 We really need local syms available to do this
1893 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1898 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1902 /* Beware of type punned pointers vs strict aliasing
1904 vpp
= &(elf_section_data (s
)->local_dynrel
);
1905 head
= (struct elf_dyn_relocs
**)vpp
;
1909 if (p
== NULL
|| p
->sec
!= sec
)
1911 bfd_size_type amt
= sizeof *p
;
1913 p
= ((struct elf_dyn_relocs
*)
1914 bfd_alloc (htab
->elf
.dynobj
, amt
));
1925 if (IS_X86_64_PCREL_TYPE (r_type
))
1930 /* This relocation describes the C++ object vtable hierarchy.
1931 Reconstruct it for later use during GC. */
1932 case R_X86_64_GNU_VTINHERIT
:
1933 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1937 /* This relocation describes which C++ vtable entries are actually
1938 used. Record for later use during GC. */
1939 case R_X86_64_GNU_VTENTRY
:
1940 BFD_ASSERT (h
!= NULL
);
1942 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1954 /* Return the section that should be marked against GC for a given
1958 elf_x86_64_gc_mark_hook (asection
*sec
,
1959 struct bfd_link_info
*info
,
1960 Elf_Internal_Rela
*rel
,
1961 struct elf_link_hash_entry
*h
,
1962 Elf_Internal_Sym
*sym
)
1965 switch (ELF32_R_TYPE (rel
->r_info
))
1967 case R_X86_64_GNU_VTINHERIT
:
1968 case R_X86_64_GNU_VTENTRY
:
1972 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1975 /* Update the got entry reference counts for the section being removed. */
1978 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
1980 const Elf_Internal_Rela
*relocs
)
1982 struct elf_x86_64_link_hash_table
*htab
;
1983 Elf_Internal_Shdr
*symtab_hdr
;
1984 struct elf_link_hash_entry
**sym_hashes
;
1985 bfd_signed_vma
*local_got_refcounts
;
1986 const Elf_Internal_Rela
*rel
, *relend
;
1988 if (info
->relocatable
)
1991 htab
= elf_x86_64_hash_table (info
);
1995 elf_section_data (sec
)->local_dynrel
= NULL
;
1997 symtab_hdr
= &elf_symtab_hdr (abfd
);
1998 sym_hashes
= elf_sym_hashes (abfd
);
1999 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2001 htab
= elf_x86_64_hash_table (info
);
2002 relend
= relocs
+ sec
->reloc_count
;
2003 for (rel
= relocs
; rel
< relend
; rel
++)
2005 unsigned long r_symndx
;
2006 unsigned int r_type
;
2007 struct elf_link_hash_entry
*h
= NULL
;
2009 r_symndx
= htab
->r_sym (rel
->r_info
);
2010 if (r_symndx
>= symtab_hdr
->sh_info
)
2012 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2013 while (h
->root
.type
== bfd_link_hash_indirect
2014 || h
->root
.type
== bfd_link_hash_warning
)
2015 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2019 /* A local symbol. */
2020 Elf_Internal_Sym
*isym
;
2022 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2025 /* Check relocation against local STT_GNU_IFUNC symbol. */
2027 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2029 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2037 struct elf_x86_64_link_hash_entry
*eh
;
2038 struct elf_dyn_relocs
**pp
;
2039 struct elf_dyn_relocs
*p
;
2041 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2043 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2046 /* Everything must go for SEC. */
2052 r_type
= ELF32_R_TYPE (rel
->r_info
);
2053 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
2054 symtab_hdr
, sym_hashes
,
2055 &r_type
, GOT_UNKNOWN
,
2056 rel
, relend
, h
, r_symndx
))
2061 case R_X86_64_TLSLD
:
2062 if (htab
->tls_ld_got
.refcount
> 0)
2063 htab
->tls_ld_got
.refcount
-= 1;
2066 case R_X86_64_TLSGD
:
2067 case R_X86_64_GOTPC32_TLSDESC
:
2068 case R_X86_64_TLSDESC_CALL
:
2069 case R_X86_64_GOTTPOFF
:
2070 case R_X86_64_GOT32
:
2071 case R_X86_64_GOTPCREL
:
2072 case R_X86_64_GOT64
:
2073 case R_X86_64_GOTPCREL64
:
2074 case R_X86_64_GOTPLT64
:
2077 if (r_type
== R_X86_64_GOTPLT64
&& h
->plt
.refcount
> 0)
2078 h
->plt
.refcount
-= 1;
2079 if (h
->got
.refcount
> 0)
2080 h
->got
.refcount
-= 1;
2081 if (h
->type
== STT_GNU_IFUNC
)
2083 if (h
->plt
.refcount
> 0)
2084 h
->plt
.refcount
-= 1;
2087 else if (local_got_refcounts
!= NULL
)
2089 if (local_got_refcounts
[r_symndx
] > 0)
2090 local_got_refcounts
[r_symndx
] -= 1;
2104 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2108 case R_X86_64_PLT32
:
2109 case R_X86_64_PLTOFF64
:
2112 if (h
->plt
.refcount
> 0)
2113 h
->plt
.refcount
-= 1;
2125 /* Adjust a symbol defined by a dynamic object and referenced by a
2126 regular object. The current definition is in some section of the
2127 dynamic object, but we're not including those sections. We have to
2128 change the definition to something the rest of the link can
2132 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2133 struct elf_link_hash_entry
*h
)
2135 struct elf_x86_64_link_hash_table
*htab
;
2137 struct elf_x86_64_link_hash_entry
*eh
;
2138 struct elf_dyn_relocs
*p
;
2140 /* STT_GNU_IFUNC symbol must go through PLT. */
2141 if (h
->type
== STT_GNU_IFUNC
)
2143 /* All local STT_GNU_IFUNC references must be treate as local
2144 calls via local PLT. */
2146 && SYMBOL_CALLS_LOCAL (info
, h
))
2148 bfd_size_type pc_count
= 0, count
= 0;
2149 struct elf_dyn_relocs
**pp
;
2151 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2152 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2154 pc_count
+= p
->pc_count
;
2155 p
->count
-= p
->pc_count
;
2164 if (pc_count
|| count
)
2167 h
->plt
.refcount
+= 1;
2172 if (h
->plt
.refcount
<= 0)
2174 h
->plt
.offset
= (bfd_vma
) -1;
2180 /* If this is a function, put it in the procedure linkage table. We
2181 will fill in the contents of the procedure linkage table later,
2182 when we know the address of the .got section. */
2183 if (h
->type
== STT_FUNC
2186 if (h
->plt
.refcount
<= 0
2187 || SYMBOL_CALLS_LOCAL (info
, h
)
2188 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2189 && h
->root
.type
== bfd_link_hash_undefweak
))
2191 /* This case can occur if we saw a PLT32 reloc in an input
2192 file, but the symbol was never referred to by a dynamic
2193 object, or if all references were garbage collected. In
2194 such a case, we don't actually need to build a procedure
2195 linkage table, and we can just do a PC32 reloc instead. */
2196 h
->plt
.offset
= (bfd_vma
) -1;
2203 /* It's possible that we incorrectly decided a .plt reloc was
2204 needed for an R_X86_64_PC32 reloc to a non-function sym in
2205 check_relocs. We can't decide accurately between function and
2206 non-function syms in check-relocs; Objects loaded later in
2207 the link may change h->type. So fix it now. */
2208 h
->plt
.offset
= (bfd_vma
) -1;
2210 /* If this is a weak symbol, and there is a real definition, the
2211 processor independent code will have arranged for us to see the
2212 real definition first, and we can just use the same value. */
2213 if (h
->u
.weakdef
!= NULL
)
2215 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2216 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2217 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2218 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2219 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2220 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2224 /* This is a reference to a symbol defined by a dynamic object which
2225 is not a function. */
2227 /* If we are creating a shared library, we must presume that the
2228 only references to the symbol are via the global offset table.
2229 For such cases we need not do anything here; the relocations will
2230 be handled correctly by relocate_section. */
2234 /* If there are no references to this symbol that do not use the
2235 GOT, we don't need to generate a copy reloc. */
2236 if (!h
->non_got_ref
)
2239 /* If -z nocopyreloc was given, we won't generate them either. */
2240 if (info
->nocopyreloc
)
2246 if (ELIMINATE_COPY_RELOCS
)
2248 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2249 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2251 s
= p
->sec
->output_section
;
2252 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2256 /* If we didn't find any dynamic relocs in read-only sections, then
2257 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2265 /* We must allocate the symbol in our .dynbss section, which will
2266 become part of the .bss section of the executable. There will be
2267 an entry for this symbol in the .dynsym section. The dynamic
2268 object will contain position independent code, so all references
2269 from the dynamic object to this symbol will go through the global
2270 offset table. The dynamic linker will use the .dynsym entry to
2271 determine the address it must put in the global offset table, so
2272 both the dynamic object and the regular object will refer to the
2273 same memory location for the variable. */
2275 htab
= elf_x86_64_hash_table (info
);
2279 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2280 to copy the initial value out of the dynamic object and into the
2281 runtime process image. */
2282 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2284 const struct elf_backend_data
*bed
;
2285 bed
= get_elf_backend_data (info
->output_bfd
);
2286 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2292 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2295 /* Allocate space in .plt, .got and associated reloc sections for
2299 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2301 struct bfd_link_info
*info
;
2302 struct elf_x86_64_link_hash_table
*htab
;
2303 struct elf_x86_64_link_hash_entry
*eh
;
2304 struct elf_dyn_relocs
*p
;
2305 const struct elf_backend_data
*bed
;
2306 unsigned int plt_entry_size
;
2308 if (h
->root
.type
== bfd_link_hash_indirect
)
2311 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2313 info
= (struct bfd_link_info
*) inf
;
2314 htab
= elf_x86_64_hash_table (info
);
2317 bed
= get_elf_backend_data (info
->output_bfd
);
2318 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2320 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2321 here if it is defined and referenced in a non-shared object. */
2322 if (h
->type
== STT_GNU_IFUNC
2324 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2328 else if (htab
->elf
.dynamic_sections_created
2329 && h
->plt
.refcount
> 0)
2331 /* Make sure this symbol is output as a dynamic symbol.
2332 Undefined weak syms won't yet be marked as dynamic. */
2333 if (h
->dynindx
== -1
2334 && !h
->forced_local
)
2336 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2341 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2343 asection
*s
= htab
->elf
.splt
;
2345 /* If this is the first .plt entry, make room for the special
2348 s
->size
+= plt_entry_size
;
2350 h
->plt
.offset
= s
->size
;
2352 /* If this symbol is not defined in a regular file, and we are
2353 not generating a shared library, then set the symbol to this
2354 location in the .plt. This is required to make function
2355 pointers compare as equal between the normal executable and
2356 the shared library. */
2360 h
->root
.u
.def
.section
= s
;
2361 h
->root
.u
.def
.value
= h
->plt
.offset
;
2364 /* Make room for this entry. */
2365 s
->size
+= plt_entry_size
;
2367 /* We also need to make an entry in the .got.plt section, which
2368 will be placed in the .got section by the linker script. */
2369 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2371 /* We also need to make an entry in the .rela.plt section. */
2372 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2373 htab
->elf
.srelplt
->reloc_count
++;
2377 h
->plt
.offset
= (bfd_vma
) -1;
2383 h
->plt
.offset
= (bfd_vma
) -1;
2387 eh
->tlsdesc_got
= (bfd_vma
) -1;
2389 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2390 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2391 if (h
->got
.refcount
> 0
2394 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2396 h
->got
.offset
= (bfd_vma
) -1;
2398 else if (h
->got
.refcount
> 0)
2402 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2404 /* Make sure this symbol is output as a dynamic symbol.
2405 Undefined weak syms won't yet be marked as dynamic. */
2406 if (h
->dynindx
== -1
2407 && !h
->forced_local
)
2409 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2413 if (GOT_TLS_GDESC_P (tls_type
))
2415 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2416 - elf_x86_64_compute_jump_table_size (htab
);
2417 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2418 h
->got
.offset
= (bfd_vma
) -2;
2420 if (! GOT_TLS_GDESC_P (tls_type
)
2421 || GOT_TLS_GD_P (tls_type
))
2424 h
->got
.offset
= s
->size
;
2425 s
->size
+= GOT_ENTRY_SIZE
;
2426 if (GOT_TLS_GD_P (tls_type
))
2427 s
->size
+= GOT_ENTRY_SIZE
;
2429 dyn
= htab
->elf
.dynamic_sections_created
;
2430 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2432 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2433 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2434 || tls_type
== GOT_TLS_IE
)
2435 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2436 else if (GOT_TLS_GD_P (tls_type
))
2437 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2438 else if (! GOT_TLS_GDESC_P (tls_type
)
2439 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2440 || h
->root
.type
!= bfd_link_hash_undefweak
)
2442 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2443 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2444 if (GOT_TLS_GDESC_P (tls_type
))
2446 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2447 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2451 h
->got
.offset
= (bfd_vma
) -1;
2453 if (eh
->dyn_relocs
== NULL
)
2456 /* In the shared -Bsymbolic case, discard space allocated for
2457 dynamic pc-relative relocs against symbols which turn out to be
2458 defined in regular objects. For the normal shared case, discard
2459 space for pc-relative relocs that have become local due to symbol
2460 visibility changes. */
2464 /* Relocs that use pc_count are those that appear on a call
2465 insn, or certain REL relocs that can generated via assembly.
2466 We want calls to protected symbols to resolve directly to the
2467 function rather than going via the plt. If people want
2468 function pointer comparisons to work as expected then they
2469 should avoid writing weird assembly. */
2470 if (SYMBOL_CALLS_LOCAL (info
, h
))
2472 struct elf_dyn_relocs
**pp
;
2474 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2476 p
->count
-= p
->pc_count
;
2485 /* Also discard relocs on undefined weak syms with non-default
2487 if (eh
->dyn_relocs
!= NULL
2488 && h
->root
.type
== bfd_link_hash_undefweak
)
2490 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2491 eh
->dyn_relocs
= NULL
;
2493 /* Make sure undefined weak symbols are output as a dynamic
2495 else if (h
->dynindx
== -1
2496 && ! h
->forced_local
2497 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2502 else if (ELIMINATE_COPY_RELOCS
)
2504 /* For the non-shared case, discard space for relocs against
2505 symbols which turn out to need copy relocs or are not
2511 || (htab
->elf
.dynamic_sections_created
2512 && (h
->root
.type
== bfd_link_hash_undefweak
2513 || h
->root
.type
== bfd_link_hash_undefined
))))
2515 /* Make sure this symbol is output as a dynamic symbol.
2516 Undefined weak syms won't yet be marked as dynamic. */
2517 if (h
->dynindx
== -1
2518 && ! h
->forced_local
2519 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2522 /* If that succeeded, we know we'll be keeping all the
2524 if (h
->dynindx
!= -1)
2528 eh
->dyn_relocs
= NULL
;
2533 /* Finally, allocate space. */
2534 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2538 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2540 BFD_ASSERT (sreloc
!= NULL
);
2542 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2548 /* Allocate space in .plt, .got and associated reloc sections for
2549 local dynamic relocs. */
2552 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2554 struct elf_link_hash_entry
*h
2555 = (struct elf_link_hash_entry
*) *slot
;
2557 if (h
->type
!= STT_GNU_IFUNC
2561 || h
->root
.type
!= bfd_link_hash_defined
)
2564 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2567 /* Find any dynamic relocs that apply to read-only sections. */
2570 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2573 struct elf_x86_64_link_hash_entry
*eh
;
2574 struct elf_dyn_relocs
*p
;
2576 /* Skip local IFUNC symbols. */
2577 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2580 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2581 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2583 asection
*s
= p
->sec
->output_section
;
2585 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2587 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2589 info
->flags
|= DF_TEXTREL
;
2591 if (info
->warn_shared_textrel
&& info
->shared
)
2592 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2593 p
->sec
->owner
, h
->root
.root
.string
,
2596 /* Not an error, just cut short the traversal. */
2604 mov foo@GOTPCREL(%rip), %reg
2607 with the local symbol, foo. */
2610 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2611 struct bfd_link_info
*link_info
)
2613 Elf_Internal_Shdr
*symtab_hdr
;
2614 Elf_Internal_Rela
*internal_relocs
;
2615 Elf_Internal_Rela
*irel
, *irelend
;
2617 struct elf_x86_64_link_hash_table
*htab
;
2618 bfd_boolean changed_contents
;
2619 bfd_boolean changed_relocs
;
2620 bfd_signed_vma
*local_got_refcounts
;
2622 /* Don't even try to convert non-ELF outputs. */
2623 if (!is_elf_hash_table (link_info
->hash
))
2626 /* Nothing to do if there are no codes, no relocations or no output. */
2627 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2628 || sec
->reloc_count
== 0
2629 || discarded_section (sec
))
2632 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2634 /* Load the relocations for this section. */
2635 internal_relocs
= (_bfd_elf_link_read_relocs
2636 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2637 link_info
->keep_memory
));
2638 if (internal_relocs
== NULL
)
2641 htab
= elf_x86_64_hash_table (link_info
);
2642 changed_contents
= FALSE
;
2643 changed_relocs
= FALSE
;
2644 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2646 /* Get the section contents. */
2647 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2648 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2651 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2655 irelend
= internal_relocs
+ sec
->reloc_count
;
2656 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2658 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2659 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2661 struct elf_link_hash_entry
*h
;
2663 if (r_type
!= R_X86_64_GOTPCREL
)
2666 /* Get the symbol referred to by the reloc. */
2667 if (r_symndx
< symtab_hdr
->sh_info
)
2669 Elf_Internal_Sym
*isym
;
2671 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2674 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2675 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2676 && bfd_get_8 (input_bfd
,
2677 contents
+ irel
->r_offset
- 2) == 0x8b)
2679 bfd_put_8 (output_bfd
, 0x8d,
2680 contents
+ irel
->r_offset
- 2);
2681 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2682 if (local_got_refcounts
!= NULL
2683 && local_got_refcounts
[r_symndx
] > 0)
2684 local_got_refcounts
[r_symndx
] -= 1;
2685 changed_contents
= TRUE
;
2686 changed_relocs
= TRUE
;
2691 indx
= r_symndx
- symtab_hdr
->sh_info
;
2692 h
= elf_sym_hashes (abfd
)[indx
];
2693 BFD_ASSERT (h
!= NULL
);
2695 while (h
->root
.type
== bfd_link_hash_indirect
2696 || h
->root
.type
== bfd_link_hash_warning
)
2697 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2699 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2700 avoid optimizing _DYNAMIC since ld.so may use its link-time
2703 && h
->type
!= STT_GNU_IFUNC
2704 && h
!= htab
->elf
.hdynamic
2705 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2706 && bfd_get_8 (input_bfd
,
2707 contents
+ irel
->r_offset
- 2) == 0x8b)
2709 bfd_put_8 (output_bfd
, 0x8d,
2710 contents
+ irel
->r_offset
- 2);
2711 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2712 if (h
->got
.refcount
> 0)
2713 h
->got
.refcount
-= 1;
2714 changed_contents
= TRUE
;
2715 changed_relocs
= TRUE
;
2719 if (contents
!= NULL
2720 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2722 if (!changed_contents
&& !link_info
->keep_memory
)
2726 /* Cache the section contents for elf_link_input_bfd. */
2727 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2731 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2733 if (!changed_relocs
)
2734 free (internal_relocs
);
2736 elf_section_data (sec
)->relocs
= internal_relocs
;
2742 if (contents
!= NULL
2743 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2745 if (internal_relocs
!= NULL
2746 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2747 free (internal_relocs
);
2751 /* Set the sizes of the dynamic sections. */
2754 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
2755 struct bfd_link_info
*info
)
2757 struct elf_x86_64_link_hash_table
*htab
;
2762 const struct elf_backend_data
*bed
;
2764 htab
= elf_x86_64_hash_table (info
);
2767 bed
= get_elf_backend_data (output_bfd
);
2769 dynobj
= htab
->elf
.dynobj
;
2773 if (htab
->elf
.dynamic_sections_created
)
2775 /* Set the contents of the .interp section to the interpreter. */
2776 if (info
->executable
)
2778 s
= bfd_get_linker_section (dynobj
, ".interp");
2781 s
->size
= htab
->dynamic_interpreter_size
;
2782 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
2786 /* Set up .got offsets for local syms, and space for local dynamic
2788 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2790 bfd_signed_vma
*local_got
;
2791 bfd_signed_vma
*end_local_got
;
2792 char *local_tls_type
;
2793 bfd_vma
*local_tlsdesc_gotent
;
2794 bfd_size_type locsymcount
;
2795 Elf_Internal_Shdr
*symtab_hdr
;
2798 if (! is_x86_64_elf (ibfd
))
2801 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2803 struct elf_dyn_relocs
*p
;
2805 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
2808 for (p
= (struct elf_dyn_relocs
*)
2809 (elf_section_data (s
)->local_dynrel
);
2813 if (!bfd_is_abs_section (p
->sec
)
2814 && bfd_is_abs_section (p
->sec
->output_section
))
2816 /* Input section has been discarded, either because
2817 it is a copy of a linkonce section or due to
2818 linker script /DISCARD/, so we'll be discarding
2821 else if (p
->count
!= 0)
2823 srel
= elf_section_data (p
->sec
)->sreloc
;
2824 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2825 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2826 && (info
->flags
& DF_TEXTREL
) == 0)
2828 info
->flags
|= DF_TEXTREL
;
2829 if (info
->warn_shared_textrel
&& info
->shared
)
2830 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2831 p
->sec
->owner
, p
->sec
);
2837 local_got
= elf_local_got_refcounts (ibfd
);
2841 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2842 locsymcount
= symtab_hdr
->sh_info
;
2843 end_local_got
= local_got
+ locsymcount
;
2844 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
2845 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
2847 srel
= htab
->elf
.srelgot
;
2848 for (; local_got
< end_local_got
;
2849 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2851 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2854 if (GOT_TLS_GDESC_P (*local_tls_type
))
2856 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2857 - elf_x86_64_compute_jump_table_size (htab
);
2858 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2859 *local_got
= (bfd_vma
) -2;
2861 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2862 || GOT_TLS_GD_P (*local_tls_type
))
2864 *local_got
= s
->size
;
2865 s
->size
+= GOT_ENTRY_SIZE
;
2866 if (GOT_TLS_GD_P (*local_tls_type
))
2867 s
->size
+= GOT_ENTRY_SIZE
;
2870 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2871 || *local_tls_type
== GOT_TLS_IE
)
2873 if (GOT_TLS_GDESC_P (*local_tls_type
))
2875 htab
->elf
.srelplt
->size
2876 += bed
->s
->sizeof_rela
;
2877 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2879 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2880 || GOT_TLS_GD_P (*local_tls_type
))
2881 srel
->size
+= bed
->s
->sizeof_rela
;
2885 *local_got
= (bfd_vma
) -1;
2889 if (htab
->tls_ld_got
.refcount
> 0)
2891 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2893 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
2894 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
2895 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2898 htab
->tls_ld_got
.offset
= -1;
2900 /* Allocate global sym .plt and .got entries, and space for global
2901 sym dynamic relocs. */
2902 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
2905 /* Allocate .plt and .got entries, and space for local symbols. */
2906 htab_traverse (htab
->loc_hash_table
,
2907 elf_x86_64_allocate_local_dynrelocs
,
2910 /* For every jump slot reserved in the sgotplt, reloc_count is
2911 incremented. However, when we reserve space for TLS descriptors,
2912 it's not incremented, so in order to compute the space reserved
2913 for them, it suffices to multiply the reloc count by the jump
2916 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2917 so that R_X86_64_IRELATIVE entries come last. */
2918 if (htab
->elf
.srelplt
)
2920 htab
->sgotplt_jump_table_size
2921 = elf_x86_64_compute_jump_table_size (htab
);
2922 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2924 else if (htab
->elf
.irelplt
)
2925 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2927 if (htab
->tlsdesc_plt
)
2929 /* If we're not using lazy TLS relocations, don't generate the
2930 PLT and GOT entries they require. */
2931 if ((info
->flags
& DF_BIND_NOW
))
2932 htab
->tlsdesc_plt
= 0;
2935 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
2936 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
2937 /* Reserve room for the initial entry.
2938 FIXME: we could probably do away with it in this case. */
2939 if (htab
->elf
.splt
->size
== 0)
2940 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
2941 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
2942 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
2946 if (htab
->elf
.sgotplt
)
2948 /* Don't allocate .got.plt section if there are no GOT nor PLT
2949 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2950 if ((htab
->elf
.hgot
== NULL
2951 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2952 && (htab
->elf
.sgotplt
->size
2953 == get_elf_backend_data (output_bfd
)->got_header_size
)
2954 && (htab
->elf
.splt
== NULL
2955 || htab
->elf
.splt
->size
== 0)
2956 && (htab
->elf
.sgot
== NULL
2957 || htab
->elf
.sgot
->size
== 0)
2958 && (htab
->elf
.iplt
== NULL
2959 || htab
->elf
.iplt
->size
== 0)
2960 && (htab
->elf
.igotplt
== NULL
2961 || htab
->elf
.igotplt
->size
== 0))
2962 htab
->elf
.sgotplt
->size
= 0;
2965 if (htab
->plt_eh_frame
!= NULL
2966 && htab
->elf
.splt
!= NULL
2967 && htab
->elf
.splt
->size
!= 0
2968 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2969 && _bfd_elf_eh_frame_present (info
))
2971 const struct elf_x86_64_backend_data
*arch_data
2972 = (const struct elf_x86_64_backend_data
*) bed
->arch_data
;
2973 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
2976 /* We now have determined the sizes of the various dynamic sections.
2977 Allocate memory for them. */
2979 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2981 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2984 if (s
== htab
->elf
.splt
2985 || s
== htab
->elf
.sgot
2986 || s
== htab
->elf
.sgotplt
2987 || s
== htab
->elf
.iplt
2988 || s
== htab
->elf
.igotplt
2989 || s
== htab
->plt_eh_frame
2990 || s
== htab
->sdynbss
)
2992 /* Strip this section if we don't need it; see the
2995 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2997 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3000 /* We use the reloc_count field as a counter if we need
3001 to copy relocs into the output file. */
3002 if (s
!= htab
->elf
.srelplt
)
3007 /* It's not one of our sections, so don't allocate space. */
3013 /* If we don't need this section, strip it from the
3014 output file. This is mostly to handle .rela.bss and
3015 .rela.plt. We must create both sections in
3016 create_dynamic_sections, because they must be created
3017 before the linker maps input sections to output
3018 sections. The linker does that before
3019 adjust_dynamic_symbol is called, and it is that
3020 function which decides whether anything needs to go
3021 into these sections. */
3023 s
->flags
|= SEC_EXCLUDE
;
3027 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3030 /* Allocate memory for the section contents. We use bfd_zalloc
3031 here in case unused entries are not reclaimed before the
3032 section's contents are written out. This should not happen,
3033 but this way if it does, we get a R_X86_64_NONE reloc instead
3035 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3036 if (s
->contents
== NULL
)
3040 if (htab
->plt_eh_frame
!= NULL
3041 && htab
->plt_eh_frame
->contents
!= NULL
)
3043 const struct elf_x86_64_backend_data
*arch_data
3044 = (const struct elf_x86_64_backend_data
*) bed
->arch_data
;
3046 memcpy (htab
->plt_eh_frame
->contents
,
3047 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3048 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3049 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3052 if (htab
->elf
.dynamic_sections_created
)
3054 /* Add some entries to the .dynamic section. We fill in the
3055 values later, in elf_x86_64_finish_dynamic_sections, but we
3056 must add the entries now so that we get the correct size for
3057 the .dynamic section. The DT_DEBUG entry is filled in by the
3058 dynamic linker and used by the debugger. */
3059 #define add_dynamic_entry(TAG, VAL) \
3060 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3062 if (info
->executable
)
3064 if (!add_dynamic_entry (DT_DEBUG
, 0))
3068 if (htab
->elf
.splt
->size
!= 0)
3070 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3071 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3072 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3073 || !add_dynamic_entry (DT_JMPREL
, 0))
3076 if (htab
->tlsdesc_plt
3077 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3078 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3084 if (!add_dynamic_entry (DT_RELA
, 0)
3085 || !add_dynamic_entry (DT_RELASZ
, 0)
3086 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3089 /* If any dynamic relocs apply to a read-only section,
3090 then we need a DT_TEXTREL entry. */
3091 if ((info
->flags
& DF_TEXTREL
) == 0)
3092 elf_link_hash_traverse (&htab
->elf
,
3093 elf_x86_64_readonly_dynrelocs
,
3096 if ((info
->flags
& DF_TEXTREL
) != 0)
3098 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3103 #undef add_dynamic_entry
3109 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3110 struct bfd_link_info
*info
)
3112 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3116 struct elf_link_hash_entry
*tlsbase
;
3118 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3119 "_TLS_MODULE_BASE_",
3120 FALSE
, FALSE
, FALSE
);
3122 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3124 struct elf_x86_64_link_hash_table
*htab
;
3125 struct bfd_link_hash_entry
*bh
= NULL
;
3126 const struct elf_backend_data
*bed
3127 = get_elf_backend_data (output_bfd
);
3129 htab
= elf_x86_64_hash_table (info
);
3133 if (!(_bfd_generic_link_add_one_symbol
3134 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3135 tls_sec
, 0, NULL
, FALSE
,
3136 bed
->collect
, &bh
)))
3139 htab
->tls_module_base
= bh
;
3141 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3142 tlsbase
->def_regular
= 1;
3143 tlsbase
->other
= STV_HIDDEN
;
3144 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3151 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3152 executables. Rather than setting it to the beginning of the TLS
3153 section, we have to set it to the end. This function may be called
3154 multiple times, it is idempotent. */
3157 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3159 struct elf_x86_64_link_hash_table
*htab
;
3160 struct bfd_link_hash_entry
*base
;
3162 if (!info
->executable
)
3165 htab
= elf_x86_64_hash_table (info
);
3169 base
= htab
->tls_module_base
;
3173 base
->u
.def
.value
= htab
->elf
.tls_size
;
3176 /* Return the base VMA address which should be subtracted from real addresses
3177 when resolving @dtpoff relocation.
3178 This is PT_TLS segment p_vaddr. */
3181 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3183 /* If tls_sec is NULL, we should have signalled an error already. */
3184 if (elf_hash_table (info
)->tls_sec
== NULL
)
3186 return elf_hash_table (info
)->tls_sec
->vma
;
3189 /* Return the relocation value for @tpoff relocation
3190 if STT_TLS virtual address is ADDRESS. */
3193 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3195 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3196 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3197 bfd_vma static_tls_size
;
3199 /* If tls_segment is NULL, we should have signalled an error already. */
3200 if (htab
->tls_sec
== NULL
)
3203 /* Consider special static TLS alignment requirements. */
3204 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3205 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3208 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3212 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3214 /* Opcode Instruction
3217 0x0f 0x8x conditional jump */
3219 && (contents
[offset
- 1] == 0xe8
3220 || contents
[offset
- 1] == 0xe9))
3222 && contents
[offset
- 2] == 0x0f
3223 && (contents
[offset
- 1] & 0xf0) == 0x80));
3226 /* Relocate an x86_64 ELF section. */
3229 elf_x86_64_relocate_section (bfd
*output_bfd
,
3230 struct bfd_link_info
*info
,
3232 asection
*input_section
,
3234 Elf_Internal_Rela
*relocs
,
3235 Elf_Internal_Sym
*local_syms
,
3236 asection
**local_sections
)
3238 struct elf_x86_64_link_hash_table
*htab
;
3239 Elf_Internal_Shdr
*symtab_hdr
;
3240 struct elf_link_hash_entry
**sym_hashes
;
3241 bfd_vma
*local_got_offsets
;
3242 bfd_vma
*local_tlsdesc_gotents
;
3243 Elf_Internal_Rela
*rel
;
3244 Elf_Internal_Rela
*relend
;
3245 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3247 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3249 htab
= elf_x86_64_hash_table (info
);
3252 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3253 sym_hashes
= elf_sym_hashes (input_bfd
);
3254 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3255 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3257 elf_x86_64_set_tls_module_base (info
);
3260 relend
= relocs
+ input_section
->reloc_count
;
3261 for (; rel
< relend
; rel
++)
3263 unsigned int r_type
;
3264 reloc_howto_type
*howto
;
3265 unsigned long r_symndx
;
3266 struct elf_link_hash_entry
*h
;
3267 Elf_Internal_Sym
*sym
;
3269 bfd_vma off
, offplt
;
3271 bfd_boolean unresolved_reloc
;
3272 bfd_reloc_status_type r
;
3276 r_type
= ELF32_R_TYPE (rel
->r_info
);
3277 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3278 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3281 if (r_type
>= R_X86_64_max
)
3283 bfd_set_error (bfd_error_bad_value
);
3287 if (r_type
!= (int) R_X86_64_32
3288 || ABI_64_P (output_bfd
))
3289 howto
= x86_64_elf_howto_table
+ r_type
;
3291 howto
= (x86_64_elf_howto_table
3292 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3293 r_symndx
= htab
->r_sym (rel
->r_info
);
3297 unresolved_reloc
= FALSE
;
3298 if (r_symndx
< symtab_hdr
->sh_info
)
3300 sym
= local_syms
+ r_symndx
;
3301 sec
= local_sections
[r_symndx
];
3303 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3306 /* Relocate against local STT_GNU_IFUNC symbol. */
3307 if (!info
->relocatable
3308 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3310 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3315 /* Set STT_GNU_IFUNC symbol value. */
3316 h
->root
.u
.def
.value
= sym
->st_value
;
3317 h
->root
.u
.def
.section
= sec
;
3322 bfd_boolean warned ATTRIBUTE_UNUSED
;
3324 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3325 r_symndx
, symtab_hdr
, sym_hashes
,
3327 unresolved_reloc
, warned
);
3330 if (sec
!= NULL
&& discarded_section (sec
))
3331 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3332 rel
, 1, relend
, howto
, 0, contents
);
3334 if (info
->relocatable
)
3337 if (rel
->r_addend
== 0
3338 && r_type
== R_X86_64_64
3339 && !ABI_64_P (output_bfd
))
3341 /* For x32, treat R_X86_64_64 like R_X86_64_32 and zero-extend
3342 it to 64bit if addend is zero. */
3343 r_type
= R_X86_64_32
;
3344 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3347 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3348 it here if it is defined in a non-shared object. */
3350 && h
->type
== STT_GNU_IFUNC
3357 if ((input_section
->flags
& SEC_ALLOC
) == 0
3358 || h
->plt
.offset
== (bfd_vma
) -1)
3361 /* STT_GNU_IFUNC symbol must go through PLT. */
3362 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
3363 relocation
= (plt
->output_section
->vma
3364 + plt
->output_offset
+ h
->plt
.offset
);
3369 if (h
->root
.root
.string
)
3370 name
= h
->root
.root
.string
;
3372 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3374 (*_bfd_error_handler
)
3375 (_("%B: relocation %s against STT_GNU_IFUNC "
3376 "symbol `%s' isn't handled by %s"), input_bfd
,
3377 x86_64_elf_howto_table
[r_type
].name
,
3378 name
, __FUNCTION__
);
3379 bfd_set_error (bfd_error_bad_value
);
3388 if (ABI_64_P (output_bfd
))
3392 if (rel
->r_addend
!= 0)
3394 if (h
->root
.root
.string
)
3395 name
= h
->root
.root
.string
;
3397 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3399 (*_bfd_error_handler
)
3400 (_("%B: relocation %s against STT_GNU_IFUNC "
3401 "symbol `%s' has non-zero addend: %d"),
3402 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3403 name
, rel
->r_addend
);
3404 bfd_set_error (bfd_error_bad_value
);
3408 /* Generate dynamic relcoation only when there is a
3409 non-GOT reference in a shared object. */
3410 if (info
->shared
&& h
->non_got_ref
)
3412 Elf_Internal_Rela outrel
;
3415 /* Need a dynamic relocation to get the real function
3417 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3421 if (outrel
.r_offset
== (bfd_vma
) -1
3422 || outrel
.r_offset
== (bfd_vma
) -2)
3425 outrel
.r_offset
+= (input_section
->output_section
->vma
3426 + input_section
->output_offset
);
3428 if (h
->dynindx
== -1
3430 || info
->executable
)
3432 /* This symbol is resolved locally. */
3433 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3434 outrel
.r_addend
= (h
->root
.u
.def
.value
3435 + h
->root
.u
.def
.section
->output_section
->vma
3436 + h
->root
.u
.def
.section
->output_offset
);
3440 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3441 outrel
.r_addend
= 0;
3444 sreloc
= htab
->elf
.irelifunc
;
3445 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3447 /* If this reloc is against an external symbol, we
3448 do not want to fiddle with the addend. Otherwise,
3449 we need to include the symbol value so that it
3450 becomes an addend for the dynamic reloc. For an
3451 internal symbol, we have updated addend. */
3457 case R_X86_64_PLT32
:
3460 case R_X86_64_GOTPCREL
:
3461 case R_X86_64_GOTPCREL64
:
3462 base_got
= htab
->elf
.sgot
;
3463 off
= h
->got
.offset
;
3465 if (base_got
== NULL
)
3468 if (off
== (bfd_vma
) -1)
3470 /* We can't use h->got.offset here to save state, or
3471 even just remember the offset, as finish_dynamic_symbol
3472 would use that as offset into .got. */
3474 if (htab
->elf
.splt
!= NULL
)
3476 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3477 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3478 base_got
= htab
->elf
.sgotplt
;
3482 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3483 off
= plt_index
* GOT_ENTRY_SIZE
;
3484 base_got
= htab
->elf
.igotplt
;
3487 if (h
->dynindx
== -1
3491 /* This references the local defitionion. We must
3492 initialize this entry in the global offset table.
3493 Since the offset must always be a multiple of 8,
3494 we use the least significant bit to record
3495 whether we have initialized it already.
3497 When doing a dynamic link, we create a .rela.got
3498 relocation entry to initialize the value. This
3499 is done in the finish_dynamic_symbol routine. */
3504 bfd_put_64 (output_bfd
, relocation
,
3505 base_got
->contents
+ off
);
3506 /* Note that this is harmless for the GOTPLT64
3507 case, as -1 | 1 still is -1. */
3513 relocation
= (base_got
->output_section
->vma
3514 + base_got
->output_offset
+ off
);
3520 /* When generating a shared object, the relocations handled here are
3521 copied into the output file to be resolved at run time. */
3524 case R_X86_64_GOT32
:
3525 case R_X86_64_GOT64
:
3526 /* Relocation is to the entry for this symbol in the global
3528 case R_X86_64_GOTPCREL
:
3529 case R_X86_64_GOTPCREL64
:
3530 /* Use global offset table entry as symbol value. */
3531 case R_X86_64_GOTPLT64
:
3532 /* This is the same as GOT64 for relocation purposes, but
3533 indicates the existence of a PLT entry. The difficulty is,
3534 that we must calculate the GOT slot offset from the PLT
3535 offset, if this symbol got a PLT entry (it was global).
3536 Additionally if it's computed from the PLT entry, then that
3537 GOT offset is relative to .got.plt, not to .got. */
3538 base_got
= htab
->elf
.sgot
;
3540 if (htab
->elf
.sgot
== NULL
)
3547 off
= h
->got
.offset
;
3549 && h
->plt
.offset
!= (bfd_vma
)-1
3550 && off
== (bfd_vma
)-1)
3552 /* We can't use h->got.offset here to save
3553 state, or even just remember the offset, as
3554 finish_dynamic_symbol would use that as offset into
3556 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3557 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3558 base_got
= htab
->elf
.sgotplt
;
3561 dyn
= htab
->elf
.dynamic_sections_created
;
3563 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3565 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3566 || (ELF_ST_VISIBILITY (h
->other
)
3567 && h
->root
.type
== bfd_link_hash_undefweak
))
3569 /* This is actually a static link, or it is a -Bsymbolic
3570 link and the symbol is defined locally, or the symbol
3571 was forced to be local because of a version file. We
3572 must initialize this entry in the global offset table.
3573 Since the offset must always be a multiple of 8, we
3574 use the least significant bit to record whether we
3575 have initialized it already.
3577 When doing a dynamic link, we create a .rela.got
3578 relocation entry to initialize the value. This is
3579 done in the finish_dynamic_symbol routine. */
3584 bfd_put_64 (output_bfd
, relocation
,
3585 base_got
->contents
+ off
);
3586 /* Note that this is harmless for the GOTPLT64 case,
3587 as -1 | 1 still is -1. */
3592 unresolved_reloc
= FALSE
;
3596 if (local_got_offsets
== NULL
)
3599 off
= local_got_offsets
[r_symndx
];
3601 /* The offset must always be a multiple of 8. We use
3602 the least significant bit to record whether we have
3603 already generated the necessary reloc. */
3608 bfd_put_64 (output_bfd
, relocation
,
3609 base_got
->contents
+ off
);
3614 Elf_Internal_Rela outrel
;
3616 /* We need to generate a R_X86_64_RELATIVE reloc
3617 for the dynamic linker. */
3618 s
= htab
->elf
.srelgot
;
3622 outrel
.r_offset
= (base_got
->output_section
->vma
3623 + base_got
->output_offset
3625 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3626 outrel
.r_addend
= relocation
;
3627 elf_append_rela (output_bfd
, s
, &outrel
);
3630 local_got_offsets
[r_symndx
] |= 1;
3634 if (off
>= (bfd_vma
) -2)
3637 relocation
= base_got
->output_section
->vma
3638 + base_got
->output_offset
+ off
;
3639 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
3640 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3641 - htab
->elf
.sgotplt
->output_offset
;
3645 case R_X86_64_GOTOFF64
:
3646 /* Relocation is relative to the start of the global offset
3649 /* Check to make sure it isn't a protected function symbol
3650 for shared library since it may not be local when used
3651 as function address. */
3652 if (!info
->executable
3654 && !SYMBOLIC_BIND (info
, h
)
3656 && h
->type
== STT_FUNC
3657 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3659 (*_bfd_error_handler
)
3660 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3661 input_bfd
, h
->root
.root
.string
);
3662 bfd_set_error (bfd_error_bad_value
);
3666 /* Note that sgot is not involved in this
3667 calculation. We always want the start of .got.plt. If we
3668 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3669 permitted by the ABI, we might have to change this
3671 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3672 + htab
->elf
.sgotplt
->output_offset
;
3675 case R_X86_64_GOTPC32
:
3676 case R_X86_64_GOTPC64
:
3677 /* Use global offset table as symbol value. */
3678 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3679 + htab
->elf
.sgotplt
->output_offset
;
3680 unresolved_reloc
= FALSE
;
3683 case R_X86_64_PLTOFF64
:
3684 /* Relocation is PLT entry relative to GOT. For local
3685 symbols it's the symbol itself relative to GOT. */
3687 /* See PLT32 handling. */
3688 && h
->plt
.offset
!= (bfd_vma
) -1
3689 && htab
->elf
.splt
!= NULL
)
3691 relocation
= (htab
->elf
.splt
->output_section
->vma
3692 + htab
->elf
.splt
->output_offset
3694 unresolved_reloc
= FALSE
;
3697 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3698 + htab
->elf
.sgotplt
->output_offset
;
3701 case R_X86_64_PLT32
:
3702 /* Relocation is to the entry for this symbol in the
3703 procedure linkage table. */
3705 /* Resolve a PLT32 reloc against a local symbol directly,
3706 without using the procedure linkage table. */
3710 if (h
->plt
.offset
== (bfd_vma
) -1
3711 || htab
->elf
.splt
== NULL
)
3713 /* We didn't make a PLT entry for this symbol. This
3714 happens when statically linking PIC code, or when
3715 using -Bsymbolic. */
3719 relocation
= (htab
->elf
.splt
->output_section
->vma
3720 + htab
->elf
.splt
->output_offset
3722 unresolved_reloc
= FALSE
;
3729 && (input_section
->flags
& SEC_ALLOC
) != 0
3730 && (input_section
->flags
& SEC_READONLY
) != 0
3733 bfd_boolean fail
= FALSE
;
3735 = (r_type
== R_X86_64_PC32
3736 && is_32bit_relative_branch (contents
, rel
->r_offset
));
3738 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
3740 /* Symbol is referenced locally. Make sure it is
3741 defined locally or for a branch. */
3742 fail
= !h
->def_regular
&& !branch
;
3746 /* Symbol isn't referenced locally. We only allow
3747 branch to symbol with non-default visibility. */
3749 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
3756 const char *pic
= "";
3758 switch (ELF_ST_VISIBILITY (h
->other
))
3761 v
= _("hidden symbol");
3764 v
= _("internal symbol");
3767 v
= _("protected symbol");
3771 pic
= _("; recompile with -fPIC");
3776 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3778 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3780 (*_bfd_error_handler
) (fmt
, input_bfd
,
3781 x86_64_elf_howto_table
[r_type
].name
,
3782 v
, h
->root
.root
.string
, pic
);
3783 bfd_set_error (bfd_error_bad_value
);
3794 /* FIXME: The ABI says the linker should make sure the value is
3795 the same when it's zeroextended to 64 bit. */
3797 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3802 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3803 || h
->root
.type
!= bfd_link_hash_undefweak
)
3804 && (! IS_X86_64_PCREL_TYPE (r_type
)
3805 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
3806 || (ELIMINATE_COPY_RELOCS
3813 || h
->root
.type
== bfd_link_hash_undefweak
3814 || h
->root
.type
== bfd_link_hash_undefined
)))
3816 Elf_Internal_Rela outrel
;
3817 bfd_boolean skip
, relocate
;
3820 /* When generating a shared object, these relocations
3821 are copied into the output file to be resolved at run
3827 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3829 if (outrel
.r_offset
== (bfd_vma
) -1)
3831 else if (outrel
.r_offset
== (bfd_vma
) -2)
3832 skip
= TRUE
, relocate
= TRUE
;
3834 outrel
.r_offset
+= (input_section
->output_section
->vma
3835 + input_section
->output_offset
);
3838 memset (&outrel
, 0, sizeof outrel
);
3840 /* h->dynindx may be -1 if this symbol was marked to
3844 && (IS_X86_64_PCREL_TYPE (r_type
)
3846 || ! SYMBOLIC_BIND (info
, h
)
3847 || ! h
->def_regular
))
3849 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3850 outrel
.r_addend
= rel
->r_addend
;
3854 /* This symbol is local, or marked to become local. */
3855 if (r_type
== htab
->pointer_r_type
)
3858 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3859 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3861 else if (r_type
== R_X86_64_64
3862 && !ABI_64_P (output_bfd
))
3865 outrel
.r_info
= htab
->r_info (0,
3866 R_X86_64_RELATIVE64
);
3867 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3868 /* Check addend overflow. */
3869 if ((outrel
.r_addend
& 0x80000000)
3870 != (rel
->r_addend
& 0x80000000))
3873 int addend
= rel
->r_addend
;
3874 if (h
&& h
->root
.root
.string
)
3875 name
= h
->root
.root
.string
;
3877 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3880 (*_bfd_error_handler
)
3881 (_("%B: addend -0x%x in relocation %s against "
3882 "symbol `%s' at 0x%lx in section `%A' is "
3884 input_bfd
, input_section
, addend
,
3885 x86_64_elf_howto_table
[r_type
].name
,
3886 name
, (unsigned long) rel
->r_offset
);
3888 (*_bfd_error_handler
)
3889 (_("%B: addend 0x%x in relocation %s against "
3890 "symbol `%s' at 0x%lx in section `%A' is "
3892 input_bfd
, input_section
, addend
,
3893 x86_64_elf_howto_table
[r_type
].name
,
3894 name
, (unsigned long) rel
->r_offset
);
3895 bfd_set_error (bfd_error_bad_value
);
3903 if (bfd_is_abs_section (sec
))
3905 else if (sec
== NULL
|| sec
->owner
== NULL
)
3907 bfd_set_error (bfd_error_bad_value
);
3914 /* We are turning this relocation into one
3915 against a section symbol. It would be
3916 proper to subtract the symbol's value,
3917 osec->vma, from the emitted reloc addend,
3918 but ld.so expects buggy relocs. */
3919 osec
= sec
->output_section
;
3920 sindx
= elf_section_data (osec
)->dynindx
;
3923 asection
*oi
= htab
->elf
.text_index_section
;
3924 sindx
= elf_section_data (oi
)->dynindx
;
3926 BFD_ASSERT (sindx
!= 0);
3929 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3930 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3934 sreloc
= elf_section_data (input_section
)->sreloc
;
3936 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3938 r
= bfd_reloc_notsupported
;
3939 goto check_relocation_error
;
3942 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3944 /* If this reloc is against an external symbol, we do
3945 not want to fiddle with the addend. Otherwise, we
3946 need to include the symbol value so that it becomes
3947 an addend for the dynamic reloc. */
3954 case R_X86_64_TLSGD
:
3955 case R_X86_64_GOTPC32_TLSDESC
:
3956 case R_X86_64_TLSDESC_CALL
:
3957 case R_X86_64_GOTTPOFF
:
3958 tls_type
= GOT_UNKNOWN
;
3959 if (h
== NULL
&& local_got_offsets
)
3960 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
3962 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
3964 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3965 input_section
, contents
,
3966 symtab_hdr
, sym_hashes
,
3967 &r_type
, tls_type
, rel
,
3968 relend
, h
, r_symndx
))
3971 if (r_type
== R_X86_64_TPOFF32
)
3973 bfd_vma roff
= rel
->r_offset
;
3975 BFD_ASSERT (! unresolved_reloc
);
3977 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
3979 /* GD->LE transition. For 64bit, change
3980 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3981 .word 0x6666; rex64; call __tls_get_addr
3984 leaq foo@tpoff(%rax), %rax
3986 leaq foo@tlsgd(%rip), %rdi
3987 .word 0x6666; rex64; call __tls_get_addr
3990 leaq foo@tpoff(%rax), %rax */
3991 if (ABI_64_P (output_bfd
))
3992 memcpy (contents
+ roff
- 4,
3993 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3996 memcpy (contents
+ roff
- 3,
3997 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3999 bfd_put_32 (output_bfd
,
4000 elf_x86_64_tpoff (info
, relocation
),
4001 contents
+ roff
+ 8);
4002 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
4006 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4008 /* GDesc -> LE transition.
4009 It's originally something like:
4010 leaq x@tlsdesc(%rip), %rax
4013 movl $x@tpoff, %rax. */
4015 unsigned int val
, type
;
4017 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4018 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4019 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4020 contents
+ roff
- 3);
4021 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4022 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4023 contents
+ roff
- 1);
4024 bfd_put_32 (output_bfd
,
4025 elf_x86_64_tpoff (info
, relocation
),
4029 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4031 /* GDesc -> LE transition.
4036 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4037 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4040 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4042 /* IE->LE transition:
4043 Originally it can be one of:
4044 movq foo@gottpoff(%rip), %reg
4045 addq foo@gottpoff(%rip), %reg
4048 leaq foo(%reg), %reg
4051 unsigned int val
, type
, reg
;
4053 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4054 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4055 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4061 bfd_put_8 (output_bfd
, 0x49,
4062 contents
+ roff
- 3);
4063 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4064 bfd_put_8 (output_bfd
, 0x41,
4065 contents
+ roff
- 3);
4066 bfd_put_8 (output_bfd
, 0xc7,
4067 contents
+ roff
- 2);
4068 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4069 contents
+ roff
- 1);
4073 /* addq -> addq - addressing with %rsp/%r12 is
4076 bfd_put_8 (output_bfd
, 0x49,
4077 contents
+ roff
- 3);
4078 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4079 bfd_put_8 (output_bfd
, 0x41,
4080 contents
+ roff
- 3);
4081 bfd_put_8 (output_bfd
, 0x81,
4082 contents
+ roff
- 2);
4083 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4084 contents
+ roff
- 1);
4090 bfd_put_8 (output_bfd
, 0x4d,
4091 contents
+ roff
- 3);
4092 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4093 bfd_put_8 (output_bfd
, 0x45,
4094 contents
+ roff
- 3);
4095 bfd_put_8 (output_bfd
, 0x8d,
4096 contents
+ roff
- 2);
4097 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4098 contents
+ roff
- 1);
4100 bfd_put_32 (output_bfd
,
4101 elf_x86_64_tpoff (info
, relocation
),
4109 if (htab
->elf
.sgot
== NULL
)
4114 off
= h
->got
.offset
;
4115 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4119 if (local_got_offsets
== NULL
)
4122 off
= local_got_offsets
[r_symndx
];
4123 offplt
= local_tlsdesc_gotents
[r_symndx
];
4130 Elf_Internal_Rela outrel
;
4134 if (htab
->elf
.srelgot
== NULL
)
4137 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4139 if (GOT_TLS_GDESC_P (tls_type
))
4141 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4142 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4143 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4144 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4145 + htab
->elf
.sgotplt
->output_offset
4147 + htab
->sgotplt_jump_table_size
);
4148 sreloc
= htab
->elf
.srelplt
;
4150 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4152 outrel
.r_addend
= 0;
4153 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4156 sreloc
= htab
->elf
.srelgot
;
4158 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4159 + htab
->elf
.sgot
->output_offset
+ off
);
4161 if (GOT_TLS_GD_P (tls_type
))
4162 dr_type
= R_X86_64_DTPMOD64
;
4163 else if (GOT_TLS_GDESC_P (tls_type
))
4166 dr_type
= R_X86_64_TPOFF64
;
4168 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4169 outrel
.r_addend
= 0;
4170 if ((dr_type
== R_X86_64_TPOFF64
4171 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4172 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4173 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4175 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4177 if (GOT_TLS_GD_P (tls_type
))
4181 BFD_ASSERT (! unresolved_reloc
);
4182 bfd_put_64 (output_bfd
,
4183 relocation
- elf_x86_64_dtpoff_base (info
),
4184 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4188 bfd_put_64 (output_bfd
, 0,
4189 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4190 outrel
.r_info
= htab
->r_info (indx
,
4192 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4193 elf_append_rela (output_bfd
, sreloc
,
4202 local_got_offsets
[r_symndx
] |= 1;
4205 if (off
>= (bfd_vma
) -2
4206 && ! GOT_TLS_GDESC_P (tls_type
))
4208 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4210 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4211 || r_type
== R_X86_64_TLSDESC_CALL
)
4212 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4213 + htab
->elf
.sgotplt
->output_offset
4214 + offplt
+ htab
->sgotplt_jump_table_size
;
4216 relocation
= htab
->elf
.sgot
->output_section
->vma
4217 + htab
->elf
.sgot
->output_offset
+ off
;
4218 unresolved_reloc
= FALSE
;
4222 bfd_vma roff
= rel
->r_offset
;
4224 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4226 /* GD->IE transition. For 64bit, change
4227 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4228 .word 0x6666; rex64; call __tls_get_addr@plt
4231 addq foo@gottpoff(%rip), %rax
4233 leaq foo@tlsgd(%rip), %rdi
4234 .word 0x6666; rex64; call __tls_get_addr@plt
4237 addq foo@gottpoff(%rip), %rax */
4238 if (ABI_64_P (output_bfd
))
4239 memcpy (contents
+ roff
- 4,
4240 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4243 memcpy (contents
+ roff
- 3,
4244 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4247 relocation
= (htab
->elf
.sgot
->output_section
->vma
4248 + htab
->elf
.sgot
->output_offset
+ off
4250 - input_section
->output_section
->vma
4251 - input_section
->output_offset
4253 bfd_put_32 (output_bfd
, relocation
,
4254 contents
+ roff
+ 8);
4255 /* Skip R_X86_64_PLT32. */
4259 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4261 /* GDesc -> IE transition.
4262 It's originally something like:
4263 leaq x@tlsdesc(%rip), %rax
4266 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4268 /* Now modify the instruction as appropriate. To
4269 turn a leaq into a movq in the form we use it, it
4270 suffices to change the second byte from 0x8d to
4272 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4274 bfd_put_32 (output_bfd
,
4275 htab
->elf
.sgot
->output_section
->vma
4276 + htab
->elf
.sgot
->output_offset
+ off
4278 - input_section
->output_section
->vma
4279 - input_section
->output_offset
4284 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4286 /* GDesc -> IE transition.
4293 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4294 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4302 case R_X86_64_TLSLD
:
4303 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4304 input_section
, contents
,
4305 symtab_hdr
, sym_hashes
,
4306 &r_type
, GOT_UNKNOWN
,
4307 rel
, relend
, h
, r_symndx
))
4310 if (r_type
!= R_X86_64_TLSLD
)
4312 /* LD->LE transition:
4313 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4314 For 64bit, we change it into:
4315 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4316 For 32bit, we change it into:
4317 nopl 0x0(%rax); movl %fs:0, %eax. */
4319 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4320 if (ABI_64_P (output_bfd
))
4321 memcpy (contents
+ rel
->r_offset
- 3,
4322 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4324 memcpy (contents
+ rel
->r_offset
- 3,
4325 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4326 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
4331 if (htab
->elf
.sgot
== NULL
)
4334 off
= htab
->tls_ld_got
.offset
;
4339 Elf_Internal_Rela outrel
;
4341 if (htab
->elf
.srelgot
== NULL
)
4344 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4345 + htab
->elf
.sgot
->output_offset
+ off
);
4347 bfd_put_64 (output_bfd
, 0,
4348 htab
->elf
.sgot
->contents
+ off
);
4349 bfd_put_64 (output_bfd
, 0,
4350 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4351 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4352 outrel
.r_addend
= 0;
4353 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4355 htab
->tls_ld_got
.offset
|= 1;
4357 relocation
= htab
->elf
.sgot
->output_section
->vma
4358 + htab
->elf
.sgot
->output_offset
+ off
;
4359 unresolved_reloc
= FALSE
;
4362 case R_X86_64_DTPOFF32
:
4363 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4364 relocation
-= elf_x86_64_dtpoff_base (info
);
4366 relocation
= elf_x86_64_tpoff (info
, relocation
);
4369 case R_X86_64_TPOFF32
:
4370 case R_X86_64_TPOFF64
:
4371 BFD_ASSERT (info
->executable
);
4372 relocation
= elf_x86_64_tpoff (info
, relocation
);
4379 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4380 because such sections are not SEC_ALLOC and thus ld.so will
4381 not process them. */
4382 if (unresolved_reloc
4383 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4385 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4386 rel
->r_offset
) != (bfd_vma
) -1)
4388 (*_bfd_error_handler
)
4389 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4392 (long) rel
->r_offset
,
4394 h
->root
.root
.string
);
4399 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4400 contents
, rel
->r_offset
,
4401 relocation
, rel
->r_addend
);
4403 check_relocation_error
:
4404 if (r
!= bfd_reloc_ok
)
4409 name
= h
->root
.root
.string
;
4412 name
= bfd_elf_string_from_elf_section (input_bfd
,
4413 symtab_hdr
->sh_link
,
4418 name
= bfd_section_name (input_bfd
, sec
);
4421 if (r
== bfd_reloc_overflow
)
4423 if (! ((*info
->callbacks
->reloc_overflow
)
4424 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4425 (bfd_vma
) 0, input_bfd
, input_section
,
4431 (*_bfd_error_handler
)
4432 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4433 input_bfd
, input_section
,
4434 (long) rel
->r_offset
, name
, (int) r
);
4443 /* Finish up dynamic symbol handling. We set the contents of various
4444 dynamic sections here. */
4447 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4448 struct bfd_link_info
*info
,
4449 struct elf_link_hash_entry
*h
,
4450 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4452 struct elf_x86_64_link_hash_table
*htab
;
4453 const struct elf_x86_64_backend_data
*const abed
4454 = get_elf_x86_64_backend_data (output_bfd
);
4456 htab
= elf_x86_64_hash_table (info
);
4460 if (h
->plt
.offset
!= (bfd_vma
) -1)
4464 Elf_Internal_Rela rela
;
4466 asection
*plt
, *gotplt
, *relplt
;
4467 const struct elf_backend_data
*bed
;
4469 /* When building a static executable, use .iplt, .igot.plt and
4470 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4471 if (htab
->elf
.splt
!= NULL
)
4473 plt
= htab
->elf
.splt
;
4474 gotplt
= htab
->elf
.sgotplt
;
4475 relplt
= htab
->elf
.srelplt
;
4479 plt
= htab
->elf
.iplt
;
4480 gotplt
= htab
->elf
.igotplt
;
4481 relplt
= htab
->elf
.irelplt
;
4484 /* This symbol has an entry in the procedure linkage table. Set
4486 if ((h
->dynindx
== -1
4487 && !((h
->forced_local
|| info
->executable
)
4489 && h
->type
== STT_GNU_IFUNC
))
4495 /* Get the index in the procedure linkage table which
4496 corresponds to this symbol. This is the index of this symbol
4497 in all the symbols for which we are making plt entries. The
4498 first entry in the procedure linkage table is reserved.
4500 Get the offset into the .got table of the entry that
4501 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4502 bytes. The first three are reserved for the dynamic linker.
4504 For static executables, we don't reserve anything. */
4506 if (plt
== htab
->elf
.splt
)
4508 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
4509 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4513 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
4514 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4517 /* Fill in the entry in the procedure linkage table. */
4518 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
4519 abed
->plt_entry_size
);
4521 /* Insert the relocation positions of the plt section. */
4523 /* Put offset the PC-relative instruction referring to the GOT entry,
4524 subtracting the size of that instruction. */
4525 bfd_put_32 (output_bfd
,
4526 (gotplt
->output_section
->vma
4527 + gotplt
->output_offset
4529 - plt
->output_section
->vma
4530 - plt
->output_offset
4532 - abed
->plt_got_insn_size
),
4533 plt
->contents
+ h
->plt
.offset
+ abed
->plt_got_offset
);
4535 /* Fill in the entry in the global offset table, initially this
4536 points to the second part of the PLT entry. */
4537 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4538 + plt
->output_offset
4539 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
4540 gotplt
->contents
+ got_offset
);
4542 /* Fill in the entry in the .rela.plt section. */
4543 rela
.r_offset
= (gotplt
->output_section
->vma
4544 + gotplt
->output_offset
4546 if (h
->dynindx
== -1
4547 || ((info
->executable
4548 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4550 && h
->type
== STT_GNU_IFUNC
))
4552 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4553 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4554 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4555 rela
.r_addend
= (h
->root
.u
.def
.value
4556 + h
->root
.u
.def
.section
->output_section
->vma
4557 + h
->root
.u
.def
.section
->output_offset
);
4558 /* R_X86_64_IRELATIVE comes last. */
4559 plt_index
= htab
->next_irelative_index
--;
4563 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4565 plt_index
= htab
->next_jump_slot_index
++;
4568 /* Don't fill PLT entry for static executables. */
4569 if (plt
== htab
->elf
.splt
)
4571 /* Put relocation index. */
4572 bfd_put_32 (output_bfd
, plt_index
,
4573 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
4574 /* Put offset for jmp .PLT0. */
4575 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ abed
->plt_plt_insn_end
),
4576 plt
->contents
+ h
->plt
.offset
+ abed
->plt_plt_offset
);
4579 bed
= get_elf_backend_data (output_bfd
);
4580 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4581 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4583 if (!h
->def_regular
)
4585 /* Mark the symbol as undefined, rather than as defined in
4586 the .plt section. Leave the value if there were any
4587 relocations where pointer equality matters (this is a clue
4588 for the dynamic linker, to make function pointer
4589 comparisons work between an application and shared
4590 library), otherwise set it to zero. If a function is only
4591 called from a binary, there is no need to slow down
4592 shared libraries because of that. */
4593 sym
->st_shndx
= SHN_UNDEF
;
4594 if (!h
->pointer_equality_needed
)
4599 if (h
->got
.offset
!= (bfd_vma
) -1
4600 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
4601 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
4603 Elf_Internal_Rela rela
;
4605 /* This symbol has an entry in the global offset table. Set it
4607 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4610 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4611 + htab
->elf
.sgot
->output_offset
4612 + (h
->got
.offset
&~ (bfd_vma
) 1));
4614 /* If this is a static link, or it is a -Bsymbolic link and the
4615 symbol is defined locally or was forced to be local because
4616 of a version file, we just want to emit a RELATIVE reloc.
4617 The entry in the global offset table will already have been
4618 initialized in the relocate_section function. */
4620 && h
->type
== STT_GNU_IFUNC
)
4624 /* Generate R_X86_64_GLOB_DAT. */
4631 if (!h
->pointer_equality_needed
)
4634 /* For non-shared object, we can't use .got.plt, which
4635 contains the real function addres if we need pointer
4636 equality. We load the GOT entry with the PLT entry. */
4637 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4638 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4639 + plt
->output_offset
4641 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4645 else if (info
->shared
4646 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4648 if (!h
->def_regular
)
4650 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4651 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4652 rela
.r_addend
= (h
->root
.u
.def
.value
4653 + h
->root
.u
.def
.section
->output_section
->vma
4654 + h
->root
.u
.def
.section
->output_offset
);
4658 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4660 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4661 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4662 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4666 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
4671 Elf_Internal_Rela rela
;
4673 /* This symbol needs a copy reloc. Set it up. */
4675 if (h
->dynindx
== -1
4676 || (h
->root
.type
!= bfd_link_hash_defined
4677 && h
->root
.type
!= bfd_link_hash_defweak
)
4678 || htab
->srelbss
== NULL
)
4681 rela
.r_offset
= (h
->root
.u
.def
.value
4682 + h
->root
.u
.def
.section
->output_section
->vma
4683 + h
->root
.u
.def
.section
->output_offset
);
4684 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4686 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
4692 /* Finish up local dynamic symbol handling. We set the contents of
4693 various dynamic sections here. */
4696 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4698 struct elf_link_hash_entry
*h
4699 = (struct elf_link_hash_entry
*) *slot
;
4700 struct bfd_link_info
*info
4701 = (struct bfd_link_info
*) inf
;
4703 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4707 /* Used to decide how to sort relocs in an optimal manner for the
4708 dynamic linker, before writing them out. */
4710 static enum elf_reloc_type_class
4711 elf_x86_64_reloc_type_class (const Elf_Internal_Rela
*rela
)
4713 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4715 case R_X86_64_RELATIVE
:
4716 case R_X86_64_RELATIVE64
:
4717 return reloc_class_relative
;
4718 case R_X86_64_JUMP_SLOT
:
4719 return reloc_class_plt
;
4721 return reloc_class_copy
;
4723 return reloc_class_normal
;
4727 /* Finish up the dynamic sections. */
4730 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4731 struct bfd_link_info
*info
)
4733 struct elf_x86_64_link_hash_table
*htab
;
4736 const struct elf_x86_64_backend_data
*const abed
4737 = get_elf_x86_64_backend_data (output_bfd
);
4739 htab
= elf_x86_64_hash_table (info
);
4743 dynobj
= htab
->elf
.dynobj
;
4744 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4746 if (htab
->elf
.dynamic_sections_created
)
4748 bfd_byte
*dyncon
, *dynconend
;
4749 const struct elf_backend_data
*bed
;
4750 bfd_size_type sizeof_dyn
;
4752 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4755 bed
= get_elf_backend_data (dynobj
);
4756 sizeof_dyn
= bed
->s
->sizeof_dyn
;
4757 dyncon
= sdyn
->contents
;
4758 dynconend
= sdyn
->contents
+ sdyn
->size
;
4759 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
4761 Elf_Internal_Dyn dyn
;
4764 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
4772 s
= htab
->elf
.sgotplt
;
4773 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4777 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
4781 s
= htab
->elf
.srelplt
->output_section
;
4782 dyn
.d_un
.d_val
= s
->size
;
4786 /* The procedure linkage table relocs (DT_JMPREL) should
4787 not be included in the overall relocs (DT_RELA).
4788 Therefore, we override the DT_RELASZ entry here to
4789 make it not include the JMPREL relocs. Since the
4790 linker script arranges for .rela.plt to follow all
4791 other relocation sections, we don't have to worry
4792 about changing the DT_RELA entry. */
4793 if (htab
->elf
.srelplt
!= NULL
)
4795 s
= htab
->elf
.srelplt
->output_section
;
4796 dyn
.d_un
.d_val
-= s
->size
;
4800 case DT_TLSDESC_PLT
:
4802 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4803 + htab
->tlsdesc_plt
;
4806 case DT_TLSDESC_GOT
:
4808 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4809 + htab
->tlsdesc_got
;
4813 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
4816 /* Fill in the special first entry in the procedure linkage table. */
4817 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4819 /* Fill in the first entry in the procedure linkage table. */
4820 memcpy (htab
->elf
.splt
->contents
,
4821 abed
->plt0_entry
, abed
->plt_entry_size
);
4822 /* Add offset for pushq GOT+8(%rip), since the instruction
4823 uses 6 bytes subtract this value. */
4824 bfd_put_32 (output_bfd
,
4825 (htab
->elf
.sgotplt
->output_section
->vma
4826 + htab
->elf
.sgotplt
->output_offset
4828 - htab
->elf
.splt
->output_section
->vma
4829 - htab
->elf
.splt
->output_offset
4831 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
4832 /* Add offset for the PC-relative instruction accessing GOT+16,
4833 subtracting the offset to the end of that instruction. */
4834 bfd_put_32 (output_bfd
,
4835 (htab
->elf
.sgotplt
->output_section
->vma
4836 + htab
->elf
.sgotplt
->output_offset
4838 - htab
->elf
.splt
->output_section
->vma
4839 - htab
->elf
.splt
->output_offset
4840 - abed
->plt0_got2_insn_end
),
4841 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
4843 elf_section_data (htab
->elf
.splt
->output_section
)
4844 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
4846 if (htab
->tlsdesc_plt
)
4848 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4849 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
4851 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
4852 abed
->plt0_entry
, abed
->plt_entry_size
);
4854 /* Add offset for pushq GOT+8(%rip), since the
4855 instruction uses 6 bytes subtract this value. */
4856 bfd_put_32 (output_bfd
,
4857 (htab
->elf
.sgotplt
->output_section
->vma
4858 + htab
->elf
.sgotplt
->output_offset
4860 - htab
->elf
.splt
->output_section
->vma
4861 - htab
->elf
.splt
->output_offset
4864 htab
->elf
.splt
->contents
4865 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
4866 /* Add offset for the PC-relative instruction accessing GOT+TDG,
4867 where TGD stands for htab->tlsdesc_got, subtracting the offset
4868 to the end of that instruction. */
4869 bfd_put_32 (output_bfd
,
4870 (htab
->elf
.sgot
->output_section
->vma
4871 + htab
->elf
.sgot
->output_offset
4873 - htab
->elf
.splt
->output_section
->vma
4874 - htab
->elf
.splt
->output_offset
4876 - abed
->plt0_got2_insn_end
),
4877 htab
->elf
.splt
->contents
4878 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
4883 if (htab
->elf
.sgotplt
)
4885 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4887 (*_bfd_error_handler
)
4888 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4892 /* Fill in the first three entries in the global offset table. */
4893 if (htab
->elf
.sgotplt
->size
> 0)
4895 /* Set the first entry in the global offset table to the address of
4896 the dynamic section. */
4898 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
4900 bfd_put_64 (output_bfd
,
4901 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
4902 htab
->elf
.sgotplt
->contents
);
4903 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4904 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
4905 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
4908 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
4912 /* Adjust .eh_frame for .plt section. */
4913 if (htab
->plt_eh_frame
!= NULL
4914 && htab
->plt_eh_frame
->contents
!= NULL
)
4916 if (htab
->elf
.splt
!= NULL
4917 && htab
->elf
.splt
->size
!= 0
4918 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4919 && htab
->elf
.splt
->output_section
!= NULL
4920 && htab
->plt_eh_frame
->output_section
!= NULL
)
4922 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4923 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4924 + htab
->plt_eh_frame
->output_offset
4925 + PLT_FDE_START_OFFSET
;
4926 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4927 htab
->plt_eh_frame
->contents
4928 + PLT_FDE_START_OFFSET
);
4930 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4932 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4934 htab
->plt_eh_frame
->contents
))
4939 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4940 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
4943 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4944 htab_traverse (htab
->loc_hash_table
,
4945 elf_x86_64_finish_local_dynamic_symbol
,
4951 /* Return address for Ith PLT stub in section PLT, for relocation REL
4952 or (bfd_vma) -1 if it should not be included. */
4955 elf_x86_64_plt_sym_val (bfd_vma i
, const asection
*plt
,
4956 const arelent
*rel ATTRIBUTE_UNUSED
)
4958 return plt
->vma
+ (i
+ 1) * GET_PLT_ENTRY_SIZE (plt
->owner
);
4961 /* Handle an x86-64 specific section when reading an object file. This
4962 is called when elfcode.h finds a section with an unknown type. */
4965 elf_x86_64_section_from_shdr (bfd
*abfd
,
4966 Elf_Internal_Shdr
*hdr
,
4970 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4973 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4979 /* Hook called by the linker routine which adds symbols from an object
4980 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4984 elf_x86_64_add_symbol_hook (bfd
*abfd
,
4985 struct bfd_link_info
*info
,
4986 Elf_Internal_Sym
*sym
,
4987 const char **namep ATTRIBUTE_UNUSED
,
4988 flagword
*flagsp ATTRIBUTE_UNUSED
,
4994 switch (sym
->st_shndx
)
4996 case SHN_X86_64_LCOMMON
:
4997 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5000 lcomm
= bfd_make_section_with_flags (abfd
,
5004 | SEC_LINKER_CREATED
));
5007 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5010 *valp
= sym
->st_size
;
5014 if ((abfd
->flags
& DYNAMIC
) == 0
5015 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5016 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
5017 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5023 /* Given a BFD section, try to locate the corresponding ELF section
5027 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5028 asection
*sec
, int *index_return
)
5030 if (sec
== &_bfd_elf_large_com_section
)
5032 *index_return
= SHN_X86_64_LCOMMON
;
5038 /* Process a symbol. */
5041 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5044 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5046 switch (elfsym
->internal_elf_sym
.st_shndx
)
5048 case SHN_X86_64_LCOMMON
:
5049 asym
->section
= &_bfd_elf_large_com_section
;
5050 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5051 /* Common symbol doesn't set BSF_GLOBAL. */
5052 asym
->flags
&= ~BSF_GLOBAL
;
5058 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5060 return (sym
->st_shndx
== SHN_COMMON
5061 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5065 elf_x86_64_common_section_index (asection
*sec
)
5067 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5070 return SHN_X86_64_LCOMMON
;
5074 elf_x86_64_common_section (asection
*sec
)
5076 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5077 return bfd_com_section_ptr
;
5079 return &_bfd_elf_large_com_section
;
5083 elf_x86_64_merge_symbol (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5084 struct elf_link_hash_entry
**sym_hash ATTRIBUTE_UNUSED
,
5085 struct elf_link_hash_entry
*h
,
5086 Elf_Internal_Sym
*sym
,
5088 bfd_vma
*pvalue ATTRIBUTE_UNUSED
,
5089 unsigned int *pold_alignment ATTRIBUTE_UNUSED
,
5090 bfd_boolean
*skip ATTRIBUTE_UNUSED
,
5091 bfd_boolean
*override ATTRIBUTE_UNUSED
,
5092 bfd_boolean
*type_change_ok ATTRIBUTE_UNUSED
,
5093 bfd_boolean
*size_change_ok ATTRIBUTE_UNUSED
,
5094 bfd_boolean
*newdyn ATTRIBUTE_UNUSED
,
5095 bfd_boolean
*newdef
,
5096 bfd_boolean
*newdyncommon ATTRIBUTE_UNUSED
,
5097 bfd_boolean
*newweak ATTRIBUTE_UNUSED
,
5098 bfd
*abfd ATTRIBUTE_UNUSED
,
5100 bfd_boolean
*olddyn ATTRIBUTE_UNUSED
,
5101 bfd_boolean
*olddef
,
5102 bfd_boolean
*olddyncommon ATTRIBUTE_UNUSED
,
5103 bfd_boolean
*oldweak ATTRIBUTE_UNUSED
,
5107 /* A normal common symbol and a large common symbol result in a
5108 normal common symbol. We turn the large common symbol into a
5111 && h
->root
.type
== bfd_link_hash_common
5113 && bfd_is_com_section (*sec
)
5116 if (sym
->st_shndx
== SHN_COMMON
5117 && (elf_section_flags (*oldsec
) & SHF_X86_64_LARGE
) != 0)
5119 h
->root
.u
.c
.p
->section
5120 = bfd_make_section_old_way (oldbfd
, "COMMON");
5121 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5123 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5124 && (elf_section_flags (*oldsec
) & SHF_X86_64_LARGE
) == 0)
5125 *psec
= *sec
= bfd_com_section_ptr
;
5132 elf_x86_64_additional_program_headers (bfd
*abfd
,
5133 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5138 /* Check to see if we need a large readonly segment. */
5139 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5140 if (s
&& (s
->flags
& SEC_LOAD
))
5143 /* Check to see if we need a large data segment. Since .lbss sections
5144 is placed right after the .bss section, there should be no need for
5145 a large data segment just because of .lbss. */
5146 s
= bfd_get_section_by_name (abfd
, ".ldata");
5147 if (s
&& (s
->flags
& SEC_LOAD
))
5153 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5156 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5158 if (h
->plt
.offset
!= (bfd_vma
) -1
5160 && !h
->pointer_equality_needed
)
5163 return _bfd_elf_hash_symbol (h
);
5166 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5169 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5170 const bfd_target
*output
)
5172 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5173 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5174 && _bfd_elf_relocs_compatible (input
, output
));
5177 static const struct bfd_elf_special_section
5178 elf_x86_64_special_sections
[]=
5180 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5181 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5182 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5183 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5184 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5185 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5186 { NULL
, 0, 0, 0, 0 }
5189 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
5190 #define TARGET_LITTLE_NAME "elf64-x86-64"
5191 #define ELF_ARCH bfd_arch_i386
5192 #define ELF_TARGET_ID X86_64_ELF_DATA
5193 #define ELF_MACHINE_CODE EM_X86_64
5194 #define ELF_MAXPAGESIZE 0x200000
5195 #define ELF_MINPAGESIZE 0x1000
5196 #define ELF_COMMONPAGESIZE 0x1000
5198 #define elf_backend_can_gc_sections 1
5199 #define elf_backend_can_refcount 1
5200 #define elf_backend_want_got_plt 1
5201 #define elf_backend_plt_readonly 1
5202 #define elf_backend_want_plt_sym 0
5203 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5204 #define elf_backend_rela_normal 1
5205 #define elf_backend_plt_alignment 4
5207 #define elf_info_to_howto elf_x86_64_info_to_howto
5209 #define bfd_elf64_bfd_link_hash_table_create \
5210 elf_x86_64_link_hash_table_create
5211 #define bfd_elf64_bfd_link_hash_table_free \
5212 elf_x86_64_link_hash_table_free
5213 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5214 #define bfd_elf64_bfd_reloc_name_lookup \
5215 elf_x86_64_reloc_name_lookup
5217 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5218 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5219 #define elf_backend_check_relocs elf_x86_64_check_relocs
5220 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5221 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5222 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5223 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5224 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5225 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5226 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5227 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5229 #define elf_backend_write_core_note elf_x86_64_write_core_note
5231 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5232 #define elf_backend_relocate_section elf_x86_64_relocate_section
5233 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5234 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5235 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5236 #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
5237 #define elf_backend_object_p elf64_x86_64_elf_object_p
5238 #define bfd_elf64_mkobject elf_x86_64_mkobject
5240 #define elf_backend_section_from_shdr \
5241 elf_x86_64_section_from_shdr
5243 #define elf_backend_section_from_bfd_section \
5244 elf_x86_64_elf_section_from_bfd_section
5245 #define elf_backend_add_symbol_hook \
5246 elf_x86_64_add_symbol_hook
5247 #define elf_backend_symbol_processing \
5248 elf_x86_64_symbol_processing
5249 #define elf_backend_common_section_index \
5250 elf_x86_64_common_section_index
5251 #define elf_backend_common_section \
5252 elf_x86_64_common_section
5253 #define elf_backend_common_definition \
5254 elf_x86_64_common_definition
5255 #define elf_backend_merge_symbol \
5256 elf_x86_64_merge_symbol
5257 #define elf_backend_special_sections \
5258 elf_x86_64_special_sections
5259 #define elf_backend_additional_program_headers \
5260 elf_x86_64_additional_program_headers
5261 #define elf_backend_hash_symbol \
5262 elf_x86_64_hash_symbol
5264 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5266 #include "elf64-target.h"
5268 /* FreeBSD support. */
5270 #undef TARGET_LITTLE_SYM
5271 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
5272 #undef TARGET_LITTLE_NAME
5273 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5276 #define ELF_OSABI ELFOSABI_FREEBSD
5279 #define elf64_bed elf64_x86_64_fbsd_bed
5281 #include "elf64-target.h"
5283 /* Solaris 2 support. */
5285 #undef TARGET_LITTLE_SYM
5286 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
5287 #undef TARGET_LITTLE_NAME
5288 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5290 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5291 objects won't be recognized. */
5295 #define elf64_bed elf64_x86_64_sol2_bed
5297 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5299 #undef elf_backend_static_tls_alignment
5300 #define elf_backend_static_tls_alignment 16
5302 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5304 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5306 #undef elf_backend_want_plt_sym
5307 #define elf_backend_want_plt_sym 1
5309 #include "elf64-target.h"
5311 /* Native Client support. */
5313 #undef TARGET_LITTLE_SYM
5314 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
5315 #undef TARGET_LITTLE_NAME
5316 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5318 #define elf64_bed elf64_x86_64_nacl_bed
5320 #undef ELF_MAXPAGESIZE
5321 #undef ELF_MINPAGESIZE
5322 #undef ELF_COMMONPAGESIZE
5323 #define ELF_MAXPAGESIZE 0x10000
5324 #define ELF_MINPAGESIZE 0x10000
5325 #define ELF_COMMONPAGESIZE 0x10000
5327 /* Restore defaults. */
5329 #undef elf_backend_static_tls_alignment
5330 #undef elf_backend_want_plt_sym
5331 #define elf_backend_want_plt_sym 0
5333 /* NaCl uses substantially different PLT entries for the same effects. */
5335 #undef elf_backend_plt_alignment
5336 #define elf_backend_plt_alignment 5
5337 #define NACL_PLT_ENTRY_SIZE 64
5338 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5340 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
5342 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5343 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5344 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5345 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5346 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5348 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5349 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */
5351 /* 32 bytes of nop to pad out to the standard size. */
5352 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5353 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5354 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5355 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5356 0x66, /* excess data32 prefix */
5360 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5362 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5363 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5364 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5365 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5367 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5368 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5369 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5371 /* Lazy GOT entries point here (32-byte aligned). */
5372 0x68, /* pushq immediate */
5373 0, 0, 0, 0, /* replaced with index into relocation table. */
5374 0xe9, /* jmp relative */
5375 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5377 /* 22 bytes of nop to pad out to the standard size. */
5378 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5379 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5380 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5383 /* .eh_frame covering the .plt section. */
5385 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
5387 #if (PLT_CIE_LENGTH != 20 \
5388 || PLT_FDE_LENGTH != 36 \
5389 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5390 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5391 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5393 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5394 0, 0, 0, 0, /* CIE ID */
5395 1, /* CIE version */
5396 'z', 'R', 0, /* Augmentation string */
5397 1, /* Code alignment factor */
5398 0x78, /* Data alignment factor */
5399 16, /* Return address column */
5400 1, /* Augmentation size */
5401 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5402 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5403 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5404 DW_CFA_nop
, DW_CFA_nop
,
5406 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5407 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
5408 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5409 0, 0, 0, 0, /* .plt size goes here */
5410 0, /* Augmentation size */
5411 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
5412 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5413 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
5414 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5415 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5416 13, /* Block length */
5417 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
5418 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
5419 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5420 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
5421 DW_CFA_nop
, DW_CFA_nop
5424 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
5426 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
5427 elf_x86_64_nacl_plt_entry
, /* plt_entry */
5428 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5429 2, /* plt0_got1_offset */
5430 9, /* plt0_got2_offset */
5431 13, /* plt0_got2_insn_end */
5432 3, /* plt_got_offset */
5433 33, /* plt_reloc_offset */
5434 38, /* plt_plt_offset */
5435 7, /* plt_got_insn_size */
5436 42, /* plt_plt_insn_end */
5437 32, /* plt_lazy_offset */
5438 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
5439 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
5442 #undef elf_backend_arch_data
5443 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5445 #undef elf_backend_modify_segment_map
5446 #define elf_backend_modify_segment_map nacl_modify_segment_map
5447 #undef elf_backend_modify_program_headers
5448 #define elf_backend_modify_program_headers nacl_modify_program_headers
5450 #include "elf64-target.h"
5452 /* Native Client x32 support. */
5454 #undef TARGET_LITTLE_SYM
5455 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
5456 #undef TARGET_LITTLE_NAME
5457 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5459 #define elf32_bed elf32_x86_64_nacl_bed
5461 #define bfd_elf32_bfd_link_hash_table_create \
5462 elf_x86_64_link_hash_table_create
5463 #define bfd_elf32_bfd_link_hash_table_free \
5464 elf_x86_64_link_hash_table_free
5465 #define bfd_elf32_bfd_reloc_type_lookup \
5466 elf_x86_64_reloc_type_lookup
5467 #define bfd_elf32_bfd_reloc_name_lookup \
5468 elf_x86_64_reloc_name_lookup
5469 #define bfd_elf32_mkobject \
5472 #undef elf_backend_object_p
5473 #define elf_backend_object_p \
5474 elf32_x86_64_elf_object_p
5476 #undef elf_backend_bfd_from_remote_memory
5477 #define elf_backend_bfd_from_remote_memory \
5478 _bfd_elf32_bfd_from_remote_memory
5480 #undef elf_backend_size_info
5481 #define elf_backend_size_info \
5482 _bfd_elf32_size_info
5484 #include "elf32-target.h"
5486 /* Restore defaults. */
5487 #undef elf_backend_object_p
5488 #define elf_backend_object_p elf64_x86_64_elf_object_p
5489 #undef elf_backend_bfd_from_remote_memory
5490 #undef elf_backend_size_info
5491 #undef elf_backend_modify_segment_map
5492 #undef elf_backend_modify_program_headers
5494 /* Intel L1OM support. */
5497 elf64_l1om_elf_object_p (bfd
*abfd
)
5499 /* Set the right machine number for an L1OM elf64 file. */
5500 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5504 #undef TARGET_LITTLE_SYM
5505 #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5506 #undef TARGET_LITTLE_NAME
5507 #define TARGET_LITTLE_NAME "elf64-l1om"
5509 #define ELF_ARCH bfd_arch_l1om
5511 #undef ELF_MACHINE_CODE
5512 #define ELF_MACHINE_CODE EM_L1OM
5517 #define elf64_bed elf64_l1om_bed
5519 #undef elf_backend_object_p
5520 #define elf_backend_object_p elf64_l1om_elf_object_p
5522 /* Restore defaults. */
5523 #undef ELF_MAXPAGESIZE
5524 #undef ELF_MINPAGESIZE
5525 #undef ELF_COMMONPAGESIZE
5526 #define ELF_MAXPAGESIZE 0x200000
5527 #define ELF_MINPAGESIZE 0x1000
5528 #define ELF_COMMONPAGESIZE 0x1000
5529 #undef elf_backend_plt_alignment
5530 #define elf_backend_plt_alignment 4
5531 #undef elf_backend_arch_data
5532 #define elf_backend_arch_data &elf_x86_64_arch_bed
5534 #include "elf64-target.h"
5536 /* FreeBSD L1OM support. */
5538 #undef TARGET_LITTLE_SYM
5539 #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5540 #undef TARGET_LITTLE_NAME
5541 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5544 #define ELF_OSABI ELFOSABI_FREEBSD
5547 #define elf64_bed elf64_l1om_fbsd_bed
5549 #include "elf64-target.h"
5551 /* Intel K1OM support. */
5554 elf64_k1om_elf_object_p (bfd
*abfd
)
5556 /* Set the right machine number for an K1OM elf64 file. */
5557 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5561 #undef TARGET_LITTLE_SYM
5562 #define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
5563 #undef TARGET_LITTLE_NAME
5564 #define TARGET_LITTLE_NAME "elf64-k1om"
5566 #define ELF_ARCH bfd_arch_k1om
5568 #undef ELF_MACHINE_CODE
5569 #define ELF_MACHINE_CODE EM_K1OM
5574 #define elf64_bed elf64_k1om_bed
5576 #undef elf_backend_object_p
5577 #define elf_backend_object_p elf64_k1om_elf_object_p
5579 #undef elf_backend_static_tls_alignment
5581 #undef elf_backend_want_plt_sym
5582 #define elf_backend_want_plt_sym 0
5584 #include "elf64-target.h"
5586 /* FreeBSD K1OM support. */
5588 #undef TARGET_LITTLE_SYM
5589 #define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
5590 #undef TARGET_LITTLE_NAME
5591 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5594 #define ELF_OSABI ELFOSABI_FREEBSD
5597 #define elf64_bed elf64_k1om_fbsd_bed
5599 #include "elf64-target.h"
5601 /* 32bit x86-64 support. */
5603 #undef TARGET_LITTLE_SYM
5604 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5605 #undef TARGET_LITTLE_NAME
5606 #define TARGET_LITTLE_NAME "elf32-x86-64"
5610 #define ELF_ARCH bfd_arch_i386
5612 #undef ELF_MACHINE_CODE
5613 #define ELF_MACHINE_CODE EM_X86_64
5617 #undef elf_backend_object_p
5618 #define elf_backend_object_p \
5619 elf32_x86_64_elf_object_p
5621 #undef elf_backend_bfd_from_remote_memory
5622 #define elf_backend_bfd_from_remote_memory \
5623 _bfd_elf32_bfd_from_remote_memory
5625 #undef elf_backend_size_info
5626 #define elf_backend_size_info \
5627 _bfd_elf32_size_info
5629 #include "elf32-target.h"