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
,
151 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
152 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", FALSE
, 0xffffffff, 0xffffffff,
154 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, FALSE
, 0, complain_overflow_unsigned
,
155 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", FALSE
, MINUS_ONE
, MINUS_ONE
,
157 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
158 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
159 "R_X86_64_GOTPC32_TLSDESC",
160 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
161 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
162 complain_overflow_dont
, bfd_elf_generic_reloc
,
163 "R_X86_64_TLSDESC_CALL",
165 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
166 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
168 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
169 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
170 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
172 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
173 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
176 /* We have a gap in the reloc numbers here.
177 R_X86_64_standard counts the number up to this point, and
178 R_X86_64_vt_offset is the value to subtract from a reloc type of
179 R_X86_64_GNU_VT* to form an index into this table. */
180 #define R_X86_64_standard (R_X86_64_RELATIVE64 + 1)
181 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
183 /* GNU extension to record C++ vtable hierarchy. */
184 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
185 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
187 /* GNU extension to record C++ vtable member usage. */
188 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
189 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
192 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
193 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
194 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
198 #define IS_X86_64_PCREL_TYPE(TYPE) \
199 ( ((TYPE) == R_X86_64_PC8) \
200 || ((TYPE) == R_X86_64_PC16) \
201 || ((TYPE) == R_X86_64_PC32) \
202 || ((TYPE) == R_X86_64_PC64))
204 /* Map BFD relocs to the x86_64 elf relocs. */
207 bfd_reloc_code_real_type bfd_reloc_val
;
208 unsigned char elf_reloc_val
;
211 static const struct elf_reloc_map x86_64_reloc_map
[] =
213 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
214 { BFD_RELOC_64
, R_X86_64_64
, },
215 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
216 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
217 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
218 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
219 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
220 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
221 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
222 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
223 { BFD_RELOC_32
, R_X86_64_32
, },
224 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
225 { BFD_RELOC_16
, R_X86_64_16
, },
226 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
227 { BFD_RELOC_8
, R_X86_64_8
, },
228 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
229 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
230 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
231 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
232 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
233 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
234 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
235 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
236 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
237 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
238 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
239 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
240 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
241 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
242 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
243 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
244 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
245 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
246 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
247 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
248 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
249 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
250 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
251 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
252 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
255 static reloc_howto_type
*
256 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
260 if (r_type
== (unsigned int) R_X86_64_32
)
265 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
267 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
268 || r_type
>= (unsigned int) R_X86_64_max
)
270 if (r_type
>= (unsigned int) R_X86_64_standard
)
272 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
274 r_type
= R_X86_64_NONE
;
279 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
280 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
281 return &x86_64_elf_howto_table
[i
];
284 /* Given a BFD reloc type, return a HOWTO structure. */
285 static reloc_howto_type
*
286 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
287 bfd_reloc_code_real_type code
)
291 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
294 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
295 return elf_x86_64_rtype_to_howto (abfd
,
296 x86_64_reloc_map
[i
].elf_reloc_val
);
301 static reloc_howto_type
*
302 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
307 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
309 /* Get x32 R_X86_64_32. */
310 reloc_howto_type
*reloc
311 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
312 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
316 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
317 if (x86_64_elf_howto_table
[i
].name
!= NULL
318 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
319 return &x86_64_elf_howto_table
[i
];
324 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
327 elf_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
328 Elf_Internal_Rela
*dst
)
332 r_type
= ELF32_R_TYPE (dst
->r_info
);
333 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
334 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
337 /* Support for core dump NOTE sections. */
339 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
344 switch (note
->descsz
)
349 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
351 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
354 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
362 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
364 elf_tdata (abfd
)->core
->signal
365 = bfd_get_16 (abfd
, note
->descdata
+ 12);
368 elf_tdata (abfd
)->core
->lwpid
369 = bfd_get_32 (abfd
, note
->descdata
+ 32);
378 /* Make a ".reg/999" section. */
379 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
380 size
, note
->descpos
+ offset
);
384 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
386 switch (note
->descsz
)
391 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
392 elf_tdata (abfd
)->core
->pid
393 = bfd_get_32 (abfd
, note
->descdata
+ 12);
394 elf_tdata (abfd
)->core
->program
395 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
396 elf_tdata (abfd
)->core
->command
397 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
400 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
401 elf_tdata (abfd
)->core
->pid
402 = bfd_get_32 (abfd
, note
->descdata
+ 24);
403 elf_tdata (abfd
)->core
->program
404 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
405 elf_tdata (abfd
)->core
->command
406 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
409 /* Note that for some reason, a spurious space is tacked
410 onto the end of the args in some (at least one anyway)
411 implementations, so strip it off if it exists. */
414 char *command
= elf_tdata (abfd
)->core
->command
;
415 int n
= strlen (command
);
417 if (0 < n
&& command
[n
- 1] == ' ')
418 command
[n
- 1] = '\0';
426 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
429 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
431 const char *fname
, *psargs
;
442 va_start (ap
, note_type
);
443 fname
= va_arg (ap
, const char *);
444 psargs
= va_arg (ap
, const char *);
447 if (bed
->s
->elfclass
== ELFCLASS32
)
450 memset (&data
, 0, sizeof (data
));
451 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
452 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
453 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
454 &data
, sizeof (data
));
459 memset (&data
, 0, sizeof (data
));
460 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
461 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
462 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
463 &data
, sizeof (data
));
468 va_start (ap
, note_type
);
469 pid
= va_arg (ap
, long);
470 cursig
= va_arg (ap
, int);
471 gregs
= va_arg (ap
, const void *);
474 if (bed
->s
->elfclass
== ELFCLASS32
)
476 if (bed
->elf_machine_code
== EM_X86_64
)
478 prstatusx32_t prstat
;
479 memset (&prstat
, 0, sizeof (prstat
));
481 prstat
.pr_cursig
= cursig
;
482 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
483 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
484 &prstat
, sizeof (prstat
));
489 memset (&prstat
, 0, sizeof (prstat
));
491 prstat
.pr_cursig
= cursig
;
492 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
493 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
494 &prstat
, sizeof (prstat
));
500 memset (&prstat
, 0, sizeof (prstat
));
502 prstat
.pr_cursig
= cursig
;
503 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
504 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
505 &prstat
, sizeof (prstat
));
512 /* Functions for the x86-64 ELF linker. */
514 /* The name of the dynamic interpreter. This is put in the .interp
517 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
518 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
520 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
521 copying dynamic variables from a shared lib into an app's dynbss
522 section, and instead use a dynamic relocation to point into the
524 #define ELIMINATE_COPY_RELOCS 1
526 /* The size in bytes of an entry in the global offset table. */
528 #define GOT_ENTRY_SIZE 8
530 /* The size in bytes of an entry in the procedure linkage table. */
532 #define PLT_ENTRY_SIZE 16
534 /* The first entry in a procedure linkage table looks like this. See the
535 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
537 static const bfd_byte elf_x86_64_plt0_entry
[PLT_ENTRY_SIZE
] =
539 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
540 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
541 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
544 /* Subsequent entries in a procedure linkage table look like this. */
546 static const bfd_byte elf_x86_64_plt_entry
[PLT_ENTRY_SIZE
] =
548 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
549 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
550 0x68, /* pushq immediate */
551 0, 0, 0, 0, /* replaced with index into relocation table. */
552 0xe9, /* jmp relative */
553 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
556 /* .eh_frame covering the .plt section. */
558 static const bfd_byte elf_x86_64_eh_frame_plt
[] =
560 #define PLT_CIE_LENGTH 20
561 #define PLT_FDE_LENGTH 36
562 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
563 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
564 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
565 0, 0, 0, 0, /* CIE ID */
567 'z', 'R', 0, /* Augmentation string */
568 1, /* Code alignment factor */
569 0x78, /* Data alignment factor */
570 16, /* Return address column */
571 1, /* Augmentation size */
572 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
573 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
574 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
575 DW_CFA_nop
, DW_CFA_nop
,
577 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
578 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
579 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
580 0, 0, 0, 0, /* .plt size goes here */
581 0, /* Augmentation size */
582 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
583 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
584 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
585 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
586 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
587 11, /* Block length */
588 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
589 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
590 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
591 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
592 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
595 /* Architecture-specific backend data for x86-64. */
597 struct elf_x86_64_backend_data
599 /* Templates for the initial PLT entry and for subsequent entries. */
600 const bfd_byte
*plt0_entry
;
601 const bfd_byte
*plt_entry
;
602 unsigned int plt_entry_size
; /* Size of each PLT entry. */
604 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
605 unsigned int plt0_got1_offset
;
606 unsigned int plt0_got2_offset
;
608 /* Offset of the end of the PC-relative instruction containing
610 unsigned int plt0_got2_insn_end
;
612 /* Offsets into plt_entry that are to be replaced with... */
613 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
614 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
615 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
617 /* Length of the PC-relative instruction containing plt_got_offset. */
618 unsigned int plt_got_insn_size
;
620 /* Offset of the end of the PC-relative jump to plt0_entry. */
621 unsigned int plt_plt_insn_end
;
623 /* Offset into plt_entry where the initial value of the GOT entry points. */
624 unsigned int plt_lazy_offset
;
626 /* .eh_frame covering the .plt section. */
627 const bfd_byte
*eh_frame_plt
;
628 unsigned int eh_frame_plt_size
;
631 #define get_elf_x86_64_arch_data(bed) \
632 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
634 #define get_elf_x86_64_backend_data(abfd) \
635 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
637 #define GET_PLT_ENTRY_SIZE(abfd) \
638 get_elf_x86_64_backend_data (abfd)->plt_entry_size
640 /* These are the standard parameters. */
641 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
643 elf_x86_64_plt0_entry
, /* plt0_entry */
644 elf_x86_64_plt_entry
, /* plt_entry */
645 sizeof (elf_x86_64_plt_entry
), /* plt_entry_size */
646 2, /* plt0_got1_offset */
647 8, /* plt0_got2_offset */
648 12, /* plt0_got2_insn_end */
649 2, /* plt_got_offset */
650 7, /* plt_reloc_offset */
651 12, /* plt_plt_offset */
652 6, /* plt_got_insn_size */
653 PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
654 6, /* plt_lazy_offset */
655 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
656 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
659 #define elf_backend_arch_data &elf_x86_64_arch_bed
661 /* x86-64 ELF linker hash entry. */
663 struct elf_x86_64_link_hash_entry
665 struct elf_link_hash_entry elf
;
667 /* Track dynamic relocs copied for this symbol. */
668 struct elf_dyn_relocs
*dyn_relocs
;
670 #define GOT_UNKNOWN 0
674 #define GOT_TLS_GDESC 4
675 #define GOT_TLS_GD_BOTH_P(type) \
676 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
677 #define GOT_TLS_GD_P(type) \
678 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
679 #define GOT_TLS_GDESC_P(type) \
680 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
681 #define GOT_TLS_GD_ANY_P(type) \
682 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
683 unsigned char tls_type
;
685 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
686 starting at the end of the jump table. */
690 #define elf_x86_64_hash_entry(ent) \
691 ((struct elf_x86_64_link_hash_entry *)(ent))
693 struct elf_x86_64_obj_tdata
695 struct elf_obj_tdata root
;
697 /* tls_type for each local got entry. */
698 char *local_got_tls_type
;
700 /* GOTPLT entries for TLS descriptors. */
701 bfd_vma
*local_tlsdesc_gotent
;
704 #define elf_x86_64_tdata(abfd) \
705 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
707 #define elf_x86_64_local_got_tls_type(abfd) \
708 (elf_x86_64_tdata (abfd)->local_got_tls_type)
710 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
711 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
713 #define is_x86_64_elf(bfd) \
714 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
715 && elf_tdata (bfd) != NULL \
716 && elf_object_id (bfd) == X86_64_ELF_DATA)
719 elf_x86_64_mkobject (bfd
*abfd
)
721 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_x86_64_obj_tdata
),
725 /* x86-64 ELF linker hash table. */
727 struct elf_x86_64_link_hash_table
729 struct elf_link_hash_table elf
;
731 /* Short-cuts to get to dynamic linker sections. */
734 asection
*plt_eh_frame
;
738 bfd_signed_vma refcount
;
742 /* The amount of space used by the jump slots in the GOT. */
743 bfd_vma sgotplt_jump_table_size
;
745 /* Small local sym cache. */
746 struct sym_cache sym_cache
;
748 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
749 bfd_vma (*r_sym
) (bfd_vma
);
750 unsigned int pointer_r_type
;
751 const char *dynamic_interpreter
;
752 int dynamic_interpreter_size
;
754 /* _TLS_MODULE_BASE_ symbol. */
755 struct bfd_link_hash_entry
*tls_module_base
;
757 /* Used by local STT_GNU_IFUNC symbols. */
758 htab_t loc_hash_table
;
759 void * loc_hash_memory
;
761 /* The offset into splt of the PLT entry for the TLS descriptor
762 resolver. Special values are 0, if not necessary (or not found
763 to be necessary yet), and -1 if needed but not determined
766 /* The offset into sgot of the GOT entry used by the PLT entry
770 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
771 bfd_vma next_jump_slot_index
;
772 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
773 bfd_vma next_irelative_index
;
776 /* Get the x86-64 ELF linker hash table from a link_info structure. */
778 #define elf_x86_64_hash_table(p) \
779 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
780 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
782 #define elf_x86_64_compute_jump_table_size(htab) \
783 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
785 /* Create an entry in an x86-64 ELF linker hash table. */
787 static struct bfd_hash_entry
*
788 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
789 struct bfd_hash_table
*table
,
792 /* Allocate the structure if it has not already been allocated by a
796 entry
= (struct bfd_hash_entry
*)
797 bfd_hash_allocate (table
,
798 sizeof (struct elf_x86_64_link_hash_entry
));
803 /* Call the allocation method of the superclass. */
804 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
807 struct elf_x86_64_link_hash_entry
*eh
;
809 eh
= (struct elf_x86_64_link_hash_entry
*) entry
;
810 eh
->dyn_relocs
= NULL
;
811 eh
->tls_type
= GOT_UNKNOWN
;
812 eh
->tlsdesc_got
= (bfd_vma
) -1;
818 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
819 for local symbol so that we can handle local STT_GNU_IFUNC symbols
820 as global symbol. We reuse indx and dynstr_index for local symbol
821 hash since they aren't used by global symbols in this backend. */
824 elf_x86_64_local_htab_hash (const void *ptr
)
826 struct elf_link_hash_entry
*h
827 = (struct elf_link_hash_entry
*) ptr
;
828 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
831 /* Compare local hash entries. */
834 elf_x86_64_local_htab_eq (const void *ptr1
, const void *ptr2
)
836 struct elf_link_hash_entry
*h1
837 = (struct elf_link_hash_entry
*) ptr1
;
838 struct elf_link_hash_entry
*h2
839 = (struct elf_link_hash_entry
*) ptr2
;
841 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
844 /* Find and/or create a hash entry for local symbol. */
846 static struct elf_link_hash_entry
*
847 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table
*htab
,
848 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
851 struct elf_x86_64_link_hash_entry e
, *ret
;
852 asection
*sec
= abfd
->sections
;
853 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
854 htab
->r_sym (rel
->r_info
));
857 e
.elf
.indx
= sec
->id
;
858 e
.elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
859 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
860 create
? INSERT
: NO_INSERT
);
867 ret
= (struct elf_x86_64_link_hash_entry
*) *slot
;
871 ret
= (struct elf_x86_64_link_hash_entry
*)
872 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
873 sizeof (struct elf_x86_64_link_hash_entry
));
876 memset (ret
, 0, sizeof (*ret
));
877 ret
->elf
.indx
= sec
->id
;
878 ret
->elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
879 ret
->elf
.dynindx
= -1;
885 /* Create an X86-64 ELF linker hash table. */
887 static struct bfd_link_hash_table
*
888 elf_x86_64_link_hash_table_create (bfd
*abfd
)
890 struct elf_x86_64_link_hash_table
*ret
;
891 bfd_size_type amt
= sizeof (struct elf_x86_64_link_hash_table
);
893 ret
= (struct elf_x86_64_link_hash_table
*) bfd_zmalloc (amt
);
897 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
898 elf_x86_64_link_hash_newfunc
,
899 sizeof (struct elf_x86_64_link_hash_entry
),
908 ret
->r_info
= elf64_r_info
;
909 ret
->r_sym
= elf64_r_sym
;
910 ret
->pointer_r_type
= R_X86_64_64
;
911 ret
->dynamic_interpreter
= ELF64_DYNAMIC_INTERPRETER
;
912 ret
->dynamic_interpreter_size
= sizeof ELF64_DYNAMIC_INTERPRETER
;
916 ret
->r_info
= elf32_r_info
;
917 ret
->r_sym
= elf32_r_sym
;
918 ret
->pointer_r_type
= R_X86_64_32
;
919 ret
->dynamic_interpreter
= ELF32_DYNAMIC_INTERPRETER
;
920 ret
->dynamic_interpreter_size
= sizeof ELF32_DYNAMIC_INTERPRETER
;
923 ret
->loc_hash_table
= htab_try_create (1024,
924 elf_x86_64_local_htab_hash
,
925 elf_x86_64_local_htab_eq
,
927 ret
->loc_hash_memory
= objalloc_create ();
928 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
934 return &ret
->elf
.root
;
937 /* Destroy an X86-64 ELF linker hash table. */
940 elf_x86_64_link_hash_table_free (struct bfd_link_hash_table
*hash
)
942 struct elf_x86_64_link_hash_table
*htab
943 = (struct elf_x86_64_link_hash_table
*) hash
;
945 if (htab
->loc_hash_table
)
946 htab_delete (htab
->loc_hash_table
);
947 if (htab
->loc_hash_memory
)
948 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
949 _bfd_elf_link_hash_table_free (hash
);
952 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
953 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
957 elf_x86_64_create_dynamic_sections (bfd
*dynobj
,
958 struct bfd_link_info
*info
)
960 struct elf_x86_64_link_hash_table
*htab
;
962 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
965 htab
= elf_x86_64_hash_table (info
);
969 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
971 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
974 || (!info
->shared
&& !htab
->srelbss
))
977 if (!info
->no_ld_generated_unwind_info
978 && htab
->plt_eh_frame
== NULL
979 && htab
->elf
.splt
!= NULL
)
981 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
982 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
983 | SEC_LINKER_CREATED
);
985 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
986 if (htab
->plt_eh_frame
== NULL
987 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 3))
993 /* Copy the extra info we tack onto an elf_link_hash_entry. */
996 elf_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
997 struct elf_link_hash_entry
*dir
,
998 struct elf_link_hash_entry
*ind
)
1000 struct elf_x86_64_link_hash_entry
*edir
, *eind
;
1002 edir
= (struct elf_x86_64_link_hash_entry
*) dir
;
1003 eind
= (struct elf_x86_64_link_hash_entry
*) ind
;
1005 if (eind
->dyn_relocs
!= NULL
)
1007 if (edir
->dyn_relocs
!= NULL
)
1009 struct elf_dyn_relocs
**pp
;
1010 struct elf_dyn_relocs
*p
;
1012 /* Add reloc counts against the indirect sym to the direct sym
1013 list. Merge any entries against the same section. */
1014 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1016 struct elf_dyn_relocs
*q
;
1018 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1019 if (q
->sec
== p
->sec
)
1021 q
->pc_count
+= p
->pc_count
;
1022 q
->count
+= p
->count
;
1029 *pp
= edir
->dyn_relocs
;
1032 edir
->dyn_relocs
= eind
->dyn_relocs
;
1033 eind
->dyn_relocs
= NULL
;
1036 if (ind
->root
.type
== bfd_link_hash_indirect
1037 && dir
->got
.refcount
<= 0)
1039 edir
->tls_type
= eind
->tls_type
;
1040 eind
->tls_type
= GOT_UNKNOWN
;
1043 if (ELIMINATE_COPY_RELOCS
1044 && ind
->root
.type
!= bfd_link_hash_indirect
1045 && dir
->dynamic_adjusted
)
1047 /* If called to transfer flags for a weakdef during processing
1048 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1049 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1050 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1051 dir
->ref_regular
|= ind
->ref_regular
;
1052 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1053 dir
->needs_plt
|= ind
->needs_plt
;
1054 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1057 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1061 elf64_x86_64_elf_object_p (bfd
*abfd
)
1063 /* Set the right machine number for an x86-64 elf64 file. */
1064 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1069 elf32_x86_64_elf_object_p (bfd
*abfd
)
1071 /* Set the right machine number for an x86-64 elf32 file. */
1072 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1076 /* Return TRUE if the TLS access code sequence support transition
1080 elf_x86_64_check_tls_transition (bfd
*abfd
,
1081 struct bfd_link_info
*info
,
1084 Elf_Internal_Shdr
*symtab_hdr
,
1085 struct elf_link_hash_entry
**sym_hashes
,
1086 unsigned int r_type
,
1087 const Elf_Internal_Rela
*rel
,
1088 const Elf_Internal_Rela
*relend
)
1091 unsigned long r_symndx
;
1092 bfd_boolean largepic
= FALSE
;
1093 struct elf_link_hash_entry
*h
;
1095 struct elf_x86_64_link_hash_table
*htab
;
1097 /* Get the section contents. */
1098 if (contents
== NULL
)
1100 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1101 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1104 /* FIXME: How to better handle error condition? */
1105 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1108 /* Cache the section contents for elf_link_input_bfd. */
1109 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1113 htab
= elf_x86_64_hash_table (info
);
1114 offset
= rel
->r_offset
;
1117 case R_X86_64_TLSGD
:
1118 case R_X86_64_TLSLD
:
1119 if ((rel
+ 1) >= relend
)
1122 if (r_type
== R_X86_64_TLSGD
)
1124 /* Check transition from GD access model. For 64bit, only
1125 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1126 .word 0x6666; rex64; call __tls_get_addr
1127 can transit to different access model. For 32bit, only
1128 leaq foo@tlsgd(%rip), %rdi
1129 .word 0x6666; rex64; call __tls_get_addr
1130 can transit to different access model. For largepic
1132 leaq foo@tlsgd(%rip), %rdi
1133 movabsq $__tls_get_addr@pltoff, %rax
1137 static const unsigned char call
[] = { 0x66, 0x66, 0x48, 0xe8 };
1138 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1140 if ((offset
+ 12) > sec
->size
)
1143 if (memcmp (contents
+ offset
+ 4, call
, 4) != 0)
1145 if (!ABI_64_P (abfd
)
1146 || (offset
+ 19) > sec
->size
1148 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0
1149 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1150 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1155 else if (ABI_64_P (abfd
))
1158 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1164 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1170 /* Check transition from LD access model. Only
1171 leaq foo@tlsld(%rip), %rdi;
1173 can transit to different access model. For largepic
1175 leaq foo@tlsld(%rip), %rdi
1176 movabsq $__tls_get_addr@pltoff, %rax
1180 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1182 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1185 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1188 if (0xe8 != *(contents
+ offset
+ 4))
1190 if (!ABI_64_P (abfd
)
1191 || (offset
+ 19) > sec
->size
1192 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1193 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1200 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1201 if (r_symndx
< symtab_hdr
->sh_info
)
1204 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1205 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1206 may be versioned. */
1208 && h
->root
.root
.string
!= NULL
1210 ? ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLTOFF64
1211 : (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1212 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
))
1213 && (strncmp (h
->root
.root
.string
,
1214 "__tls_get_addr", 14) == 0));
1216 case R_X86_64_GOTTPOFF
:
1217 /* Check transition from IE access model:
1218 mov foo@gottpoff(%rip), %reg
1219 add foo@gottpoff(%rip), %reg
1222 /* Check REX prefix first. */
1223 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1225 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1226 if (val
!= 0x48 && val
!= 0x4c)
1228 /* X32 may have 0x44 REX prefix or no REX prefix. */
1229 if (ABI_64_P (abfd
))
1235 /* X32 may not have any REX prefix. */
1236 if (ABI_64_P (abfd
))
1238 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1242 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1243 if (val
!= 0x8b && val
!= 0x03)
1246 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1247 return (val
& 0xc7) == 5;
1249 case R_X86_64_GOTPC32_TLSDESC
:
1250 /* Check transition from GDesc access model:
1251 leaq x@tlsdesc(%rip), %rax
1253 Make sure it's a leaq adding rip to a 32-bit offset
1254 into any register, although it's probably almost always
1257 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1260 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1261 if ((val
& 0xfb) != 0x48)
1264 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1267 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1268 return (val
& 0xc7) == 0x05;
1270 case R_X86_64_TLSDESC_CALL
:
1271 /* Check transition from GDesc access model:
1272 call *x@tlsdesc(%rax)
1274 if (offset
+ 2 <= sec
->size
)
1276 /* Make sure that it's a call *x@tlsdesc(%rax). */
1277 static const unsigned char call
[] = { 0xff, 0x10 };
1278 return memcmp (contents
+ offset
, call
, 2) == 0;
1288 /* Return TRUE if the TLS access transition is OK or no transition
1289 will be performed. Update R_TYPE if there is a transition. */
1292 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1293 asection
*sec
, bfd_byte
*contents
,
1294 Elf_Internal_Shdr
*symtab_hdr
,
1295 struct elf_link_hash_entry
**sym_hashes
,
1296 unsigned int *r_type
, int tls_type
,
1297 const Elf_Internal_Rela
*rel
,
1298 const Elf_Internal_Rela
*relend
,
1299 struct elf_link_hash_entry
*h
,
1300 unsigned long r_symndx
)
1302 unsigned int from_type
= *r_type
;
1303 unsigned int to_type
= from_type
;
1304 bfd_boolean check
= TRUE
;
1306 /* Skip TLS transition for functions. */
1308 && (h
->type
== STT_FUNC
1309 || h
->type
== STT_GNU_IFUNC
))
1314 case R_X86_64_TLSGD
:
1315 case R_X86_64_GOTPC32_TLSDESC
:
1316 case R_X86_64_TLSDESC_CALL
:
1317 case R_X86_64_GOTTPOFF
:
1318 if (info
->executable
)
1321 to_type
= R_X86_64_TPOFF32
;
1323 to_type
= R_X86_64_GOTTPOFF
;
1326 /* When we are called from elf_x86_64_relocate_section,
1327 CONTENTS isn't NULL and there may be additional transitions
1328 based on TLS_TYPE. */
1329 if (contents
!= NULL
)
1331 unsigned int new_to_type
= to_type
;
1333 if (info
->executable
1336 && tls_type
== GOT_TLS_IE
)
1337 new_to_type
= R_X86_64_TPOFF32
;
1339 if (to_type
== R_X86_64_TLSGD
1340 || to_type
== R_X86_64_GOTPC32_TLSDESC
1341 || to_type
== R_X86_64_TLSDESC_CALL
)
1343 if (tls_type
== GOT_TLS_IE
)
1344 new_to_type
= R_X86_64_GOTTPOFF
;
1347 /* We checked the transition before when we were called from
1348 elf_x86_64_check_relocs. We only want to check the new
1349 transition which hasn't been checked before. */
1350 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1351 to_type
= new_to_type
;
1356 case R_X86_64_TLSLD
:
1357 if (info
->executable
)
1358 to_type
= R_X86_64_TPOFF32
;
1365 /* Return TRUE if there is no transition. */
1366 if (from_type
== to_type
)
1369 /* Check if the transition can be performed. */
1371 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1372 symtab_hdr
, sym_hashes
,
1373 from_type
, rel
, relend
))
1375 reloc_howto_type
*from
, *to
;
1378 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1379 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1382 name
= h
->root
.root
.string
;
1385 struct elf_x86_64_link_hash_table
*htab
;
1387 htab
= elf_x86_64_hash_table (info
);
1392 Elf_Internal_Sym
*isym
;
1394 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1396 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1400 (*_bfd_error_handler
)
1401 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1402 "in section `%A' failed"),
1403 abfd
, sec
, from
->name
, to
->name
, name
,
1404 (unsigned long) rel
->r_offset
);
1405 bfd_set_error (bfd_error_bad_value
);
1413 /* Look through the relocs for a section during the first phase, and
1414 calculate needed space in the global offset table, procedure
1415 linkage table, and dynamic reloc sections. */
1418 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1420 const Elf_Internal_Rela
*relocs
)
1422 struct elf_x86_64_link_hash_table
*htab
;
1423 Elf_Internal_Shdr
*symtab_hdr
;
1424 struct elf_link_hash_entry
**sym_hashes
;
1425 const Elf_Internal_Rela
*rel
;
1426 const Elf_Internal_Rela
*rel_end
;
1429 if (info
->relocatable
)
1432 BFD_ASSERT (is_x86_64_elf (abfd
));
1434 htab
= elf_x86_64_hash_table (info
);
1438 symtab_hdr
= &elf_symtab_hdr (abfd
);
1439 sym_hashes
= elf_sym_hashes (abfd
);
1443 rel_end
= relocs
+ sec
->reloc_count
;
1444 for (rel
= relocs
; rel
< rel_end
; rel
++)
1446 unsigned int r_type
;
1447 unsigned long r_symndx
;
1448 struct elf_link_hash_entry
*h
;
1449 Elf_Internal_Sym
*isym
;
1451 bfd_boolean size_reloc
;
1453 r_symndx
= htab
->r_sym (rel
->r_info
);
1454 r_type
= ELF32_R_TYPE (rel
->r_info
);
1456 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1458 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1463 if (r_symndx
< symtab_hdr
->sh_info
)
1465 /* A local symbol. */
1466 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1471 /* Check relocation against local STT_GNU_IFUNC symbol. */
1472 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1474 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
,
1479 /* Fake a STT_GNU_IFUNC symbol. */
1480 h
->type
= STT_GNU_IFUNC
;
1483 h
->forced_local
= 1;
1484 h
->root
.type
= bfd_link_hash_defined
;
1492 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1493 while (h
->root
.type
== bfd_link_hash_indirect
1494 || h
->root
.type
== bfd_link_hash_warning
)
1495 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1498 /* Check invalid x32 relocations. */
1499 if (!ABI_64_P (abfd
))
1505 case R_X86_64_DTPOFF64
:
1506 case R_X86_64_TPOFF64
:
1508 case R_X86_64_GOTOFF64
:
1509 case R_X86_64_GOT64
:
1510 case R_X86_64_GOTPCREL64
:
1511 case R_X86_64_GOTPC64
:
1512 case R_X86_64_GOTPLT64
:
1513 case R_X86_64_PLTOFF64
:
1516 name
= h
->root
.root
.string
;
1518 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1520 (*_bfd_error_handler
)
1521 (_("%B: relocation %s against symbol `%s' isn't "
1522 "supported in x32 mode"), abfd
,
1523 x86_64_elf_howto_table
[r_type
].name
, name
);
1524 bfd_set_error (bfd_error_bad_value
);
1532 /* Create the ifunc sections for static executables. If we
1533 never see an indirect function symbol nor we are building
1534 a static executable, those sections will be empty and
1535 won't appear in output. */
1546 case R_X86_64_PLT32
:
1547 case R_X86_64_GOTPCREL
:
1548 case R_X86_64_GOTPCREL64
:
1549 if (htab
->elf
.dynobj
== NULL
)
1550 htab
->elf
.dynobj
= abfd
;
1551 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1556 /* It is referenced by a non-shared object. */
1558 h
->root
.non_ir_ref
= 1;
1561 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1562 symtab_hdr
, sym_hashes
,
1563 &r_type
, GOT_UNKNOWN
,
1564 rel
, rel_end
, h
, r_symndx
))
1569 case R_X86_64_TLSLD
:
1570 htab
->tls_ld_got
.refcount
+= 1;
1573 case R_X86_64_TPOFF32
:
1574 if (!info
->executable
&& ABI_64_P (abfd
))
1577 name
= h
->root
.root
.string
;
1579 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1581 (*_bfd_error_handler
)
1582 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1584 x86_64_elf_howto_table
[r_type
].name
, name
);
1585 bfd_set_error (bfd_error_bad_value
);
1590 case R_X86_64_GOTTPOFF
:
1591 if (!info
->executable
)
1592 info
->flags
|= DF_STATIC_TLS
;
1595 case R_X86_64_GOT32
:
1596 case R_X86_64_GOTPCREL
:
1597 case R_X86_64_TLSGD
:
1598 case R_X86_64_GOT64
:
1599 case R_X86_64_GOTPCREL64
:
1600 case R_X86_64_GOTPLT64
:
1601 case R_X86_64_GOTPC32_TLSDESC
:
1602 case R_X86_64_TLSDESC_CALL
:
1603 /* This symbol requires a global offset table entry. */
1605 int tls_type
, old_tls_type
;
1609 default: tls_type
= GOT_NORMAL
; break;
1610 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1611 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1612 case R_X86_64_GOTPC32_TLSDESC
:
1613 case R_X86_64_TLSDESC_CALL
:
1614 tls_type
= GOT_TLS_GDESC
; break;
1619 if (r_type
== R_X86_64_GOTPLT64
)
1621 /* This relocation indicates that we also need
1622 a PLT entry, as this is a function. We don't need
1623 a PLT entry for local symbols. */
1625 h
->plt
.refcount
+= 1;
1627 h
->got
.refcount
+= 1;
1628 old_tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
1632 bfd_signed_vma
*local_got_refcounts
;
1634 /* This is a global offset table entry for a local symbol. */
1635 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1636 if (local_got_refcounts
== NULL
)
1640 size
= symtab_hdr
->sh_info
;
1641 size
*= sizeof (bfd_signed_vma
)
1642 + sizeof (bfd_vma
) + sizeof (char);
1643 local_got_refcounts
= ((bfd_signed_vma
*)
1644 bfd_zalloc (abfd
, size
));
1645 if (local_got_refcounts
== NULL
)
1647 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1648 elf_x86_64_local_tlsdesc_gotent (abfd
)
1649 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1650 elf_x86_64_local_got_tls_type (abfd
)
1651 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1653 local_got_refcounts
[r_symndx
] += 1;
1655 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1658 /* If a TLS symbol is accessed using IE at least once,
1659 there is no point to use dynamic model for it. */
1660 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1661 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1662 || tls_type
!= GOT_TLS_IE
))
1664 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1665 tls_type
= old_tls_type
;
1666 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1667 && GOT_TLS_GD_ANY_P (tls_type
))
1668 tls_type
|= old_tls_type
;
1672 name
= h
->root
.root
.string
;
1674 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1676 (*_bfd_error_handler
)
1677 (_("%B: '%s' accessed both as normal and thread local symbol"),
1679 bfd_set_error (bfd_error_bad_value
);
1684 if (old_tls_type
!= tls_type
)
1687 elf_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1689 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1694 case R_X86_64_GOTOFF64
:
1695 case R_X86_64_GOTPC32
:
1696 case R_X86_64_GOTPC64
:
1698 if (htab
->elf
.sgot
== NULL
)
1700 if (htab
->elf
.dynobj
== NULL
)
1701 htab
->elf
.dynobj
= abfd
;
1702 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1708 case R_X86_64_PLT32
:
1709 /* This symbol requires a procedure linkage table entry. We
1710 actually build the entry in adjust_dynamic_symbol,
1711 because this might be a case of linking PIC code which is
1712 never referenced by a dynamic object, in which case we
1713 don't need to generate a procedure linkage table entry
1716 /* If this is a local symbol, we resolve it directly without
1717 creating a procedure linkage table entry. */
1722 h
->plt
.refcount
+= 1;
1725 case R_X86_64_PLTOFF64
:
1726 /* This tries to form the 'address' of a function relative
1727 to GOT. For global symbols we need a PLT entry. */
1731 h
->plt
.refcount
+= 1;
1735 case R_X86_64_SIZE32
:
1736 case R_X86_64_SIZE64
:
1741 if (!ABI_64_P (abfd
))
1746 /* Let's help debug shared library creation. These relocs
1747 cannot be used in shared libs. Don't error out for
1748 sections we don't care about, such as debug sections or
1749 non-constant sections. */
1751 && (sec
->flags
& SEC_ALLOC
) != 0
1752 && (sec
->flags
& SEC_READONLY
) != 0)
1755 name
= h
->root
.root
.string
;
1757 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1758 (*_bfd_error_handler
)
1759 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1760 abfd
, x86_64_elf_howto_table
[r_type
].name
, name
);
1761 bfd_set_error (bfd_error_bad_value
);
1772 if (h
!= NULL
&& info
->executable
)
1774 /* If this reloc is in a read-only section, we might
1775 need a copy reloc. We can't check reliably at this
1776 stage whether the section is read-only, as input
1777 sections have not yet been mapped to output sections.
1778 Tentatively set the flag for now, and correct in
1779 adjust_dynamic_symbol. */
1782 /* We may need a .plt entry if the function this reloc
1783 refers to is in a shared lib. */
1784 h
->plt
.refcount
+= 1;
1785 if (r_type
!= R_X86_64_PC32
&& r_type
!= R_X86_64_PC64
)
1786 h
->pointer_equality_needed
= 1;
1791 /* If we are creating a shared library, and this is a reloc
1792 against a global symbol, or a non PC relative reloc
1793 against a local symbol, then we need to copy the reloc
1794 into the shared library. However, if we are linking with
1795 -Bsymbolic, we do not need to copy a reloc against a
1796 global symbol which is defined in an object we are
1797 including in the link (i.e., DEF_REGULAR is set). At
1798 this point we have not seen all the input files, so it is
1799 possible that DEF_REGULAR is not set now but will be set
1800 later (it is never cleared). In case of a weak definition,
1801 DEF_REGULAR may be cleared later by a strong definition in
1802 a shared library. We account for that possibility below by
1803 storing information in the relocs_copied field of the hash
1804 table entry. A similar situation occurs when creating
1805 shared libraries and symbol visibility changes render the
1808 If on the other hand, we are creating an executable, we
1809 may need to keep relocations for symbols satisfied by a
1810 dynamic library if we manage to avoid copy relocs for the
1813 && (sec
->flags
& SEC_ALLOC
) != 0
1814 && (! IS_X86_64_PCREL_TYPE (r_type
)
1816 && (! SYMBOLIC_BIND (info
, h
)
1817 || h
->root
.type
== bfd_link_hash_defweak
1818 || !h
->def_regular
))))
1819 || (ELIMINATE_COPY_RELOCS
1821 && (sec
->flags
& SEC_ALLOC
) != 0
1823 && (h
->root
.type
== bfd_link_hash_defweak
1824 || !h
->def_regular
)))
1826 struct elf_dyn_relocs
*p
;
1827 struct elf_dyn_relocs
**head
;
1829 /* We must copy these reloc types into the output file.
1830 Create a reloc section in dynobj and make room for
1834 if (htab
->elf
.dynobj
== NULL
)
1835 htab
->elf
.dynobj
= abfd
;
1837 sreloc
= _bfd_elf_make_dynamic_reloc_section
1838 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
1839 abfd
, /*rela?*/ TRUE
);
1845 /* If this is a global symbol, we count the number of
1846 relocations we need for this symbol. */
1849 head
= &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
1853 /* Track dynamic relocs needed for local syms too.
1854 We really need local syms available to do this
1859 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1864 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1868 /* Beware of type punned pointers vs strict aliasing
1870 vpp
= &(elf_section_data (s
)->local_dynrel
);
1871 head
= (struct elf_dyn_relocs
**)vpp
;
1875 if (p
== NULL
|| p
->sec
!= sec
)
1877 bfd_size_type amt
= sizeof *p
;
1879 p
= ((struct elf_dyn_relocs
*)
1880 bfd_alloc (htab
->elf
.dynobj
, amt
));
1891 /* Count size relocation as PC-relative relocation. */
1892 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
1897 /* This relocation describes the C++ object vtable hierarchy.
1898 Reconstruct it for later use during GC. */
1899 case R_X86_64_GNU_VTINHERIT
:
1900 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1904 /* This relocation describes which C++ vtable entries are actually
1905 used. Record for later use during GC. */
1906 case R_X86_64_GNU_VTENTRY
:
1907 BFD_ASSERT (h
!= NULL
);
1909 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1921 /* Return the section that should be marked against GC for a given
1925 elf_x86_64_gc_mark_hook (asection
*sec
,
1926 struct bfd_link_info
*info
,
1927 Elf_Internal_Rela
*rel
,
1928 struct elf_link_hash_entry
*h
,
1929 Elf_Internal_Sym
*sym
)
1932 switch (ELF32_R_TYPE (rel
->r_info
))
1934 case R_X86_64_GNU_VTINHERIT
:
1935 case R_X86_64_GNU_VTENTRY
:
1939 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1942 /* Update the got entry reference counts for the section being removed. */
1945 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
1947 const Elf_Internal_Rela
*relocs
)
1949 struct elf_x86_64_link_hash_table
*htab
;
1950 Elf_Internal_Shdr
*symtab_hdr
;
1951 struct elf_link_hash_entry
**sym_hashes
;
1952 bfd_signed_vma
*local_got_refcounts
;
1953 const Elf_Internal_Rela
*rel
, *relend
;
1955 if (info
->relocatable
)
1958 htab
= elf_x86_64_hash_table (info
);
1962 elf_section_data (sec
)->local_dynrel
= NULL
;
1964 symtab_hdr
= &elf_symtab_hdr (abfd
);
1965 sym_hashes
= elf_sym_hashes (abfd
);
1966 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1968 htab
= elf_x86_64_hash_table (info
);
1969 relend
= relocs
+ sec
->reloc_count
;
1970 for (rel
= relocs
; rel
< relend
; rel
++)
1972 unsigned long r_symndx
;
1973 unsigned int r_type
;
1974 struct elf_link_hash_entry
*h
= NULL
;
1976 r_symndx
= htab
->r_sym (rel
->r_info
);
1977 if (r_symndx
>= symtab_hdr
->sh_info
)
1979 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1980 while (h
->root
.type
== bfd_link_hash_indirect
1981 || h
->root
.type
== bfd_link_hash_warning
)
1982 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1986 /* A local symbol. */
1987 Elf_Internal_Sym
*isym
;
1989 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1992 /* Check relocation against local STT_GNU_IFUNC symbol. */
1994 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1996 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2004 struct elf_x86_64_link_hash_entry
*eh
;
2005 struct elf_dyn_relocs
**pp
;
2006 struct elf_dyn_relocs
*p
;
2008 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2010 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2013 /* Everything must go for SEC. */
2019 r_type
= ELF32_R_TYPE (rel
->r_info
);
2020 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
2021 symtab_hdr
, sym_hashes
,
2022 &r_type
, GOT_UNKNOWN
,
2023 rel
, relend
, h
, r_symndx
))
2028 case R_X86_64_TLSLD
:
2029 if (htab
->tls_ld_got
.refcount
> 0)
2030 htab
->tls_ld_got
.refcount
-= 1;
2033 case R_X86_64_TLSGD
:
2034 case R_X86_64_GOTPC32_TLSDESC
:
2035 case R_X86_64_TLSDESC_CALL
:
2036 case R_X86_64_GOTTPOFF
:
2037 case R_X86_64_GOT32
:
2038 case R_X86_64_GOTPCREL
:
2039 case R_X86_64_GOT64
:
2040 case R_X86_64_GOTPCREL64
:
2041 case R_X86_64_GOTPLT64
:
2044 if (r_type
== R_X86_64_GOTPLT64
&& h
->plt
.refcount
> 0)
2045 h
->plt
.refcount
-= 1;
2046 if (h
->got
.refcount
> 0)
2047 h
->got
.refcount
-= 1;
2048 if (h
->type
== STT_GNU_IFUNC
)
2050 if (h
->plt
.refcount
> 0)
2051 h
->plt
.refcount
-= 1;
2054 else if (local_got_refcounts
!= NULL
)
2056 if (local_got_refcounts
[r_symndx
] > 0)
2057 local_got_refcounts
[r_symndx
] -= 1;
2070 case R_X86_64_SIZE32
:
2071 case R_X86_64_SIZE64
:
2073 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2077 case R_X86_64_PLT32
:
2078 case R_X86_64_PLTOFF64
:
2081 if (h
->plt
.refcount
> 0)
2082 h
->plt
.refcount
-= 1;
2094 /* Adjust a symbol defined by a dynamic object and referenced by a
2095 regular object. The current definition is in some section of the
2096 dynamic object, but we're not including those sections. We have to
2097 change the definition to something the rest of the link can
2101 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2102 struct elf_link_hash_entry
*h
)
2104 struct elf_x86_64_link_hash_table
*htab
;
2106 struct elf_x86_64_link_hash_entry
*eh
;
2107 struct elf_dyn_relocs
*p
;
2109 /* STT_GNU_IFUNC symbol must go through PLT. */
2110 if (h
->type
== STT_GNU_IFUNC
)
2112 /* All local STT_GNU_IFUNC references must be treate as local
2113 calls via local PLT. */
2115 && SYMBOL_CALLS_LOCAL (info
, h
))
2117 bfd_size_type pc_count
= 0, count
= 0;
2118 struct elf_dyn_relocs
**pp
;
2120 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2121 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2123 pc_count
+= p
->pc_count
;
2124 p
->count
-= p
->pc_count
;
2133 if (pc_count
|| count
)
2137 if (h
->plt
.refcount
<= 0)
2138 h
->plt
.refcount
= 1;
2140 h
->plt
.refcount
+= 1;
2144 if (h
->plt
.refcount
<= 0)
2146 h
->plt
.offset
= (bfd_vma
) -1;
2152 /* If this is a function, put it in the procedure linkage table. We
2153 will fill in the contents of the procedure linkage table later,
2154 when we know the address of the .got section. */
2155 if (h
->type
== STT_FUNC
2158 if (h
->plt
.refcount
<= 0
2159 || SYMBOL_CALLS_LOCAL (info
, h
)
2160 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2161 && h
->root
.type
== bfd_link_hash_undefweak
))
2163 /* This case can occur if we saw a PLT32 reloc in an input
2164 file, but the symbol was never referred to by a dynamic
2165 object, or if all references were garbage collected. In
2166 such a case, we don't actually need to build a procedure
2167 linkage table, and we can just do a PC32 reloc instead. */
2168 h
->plt
.offset
= (bfd_vma
) -1;
2175 /* It's possible that we incorrectly decided a .plt reloc was
2176 needed for an R_X86_64_PC32 reloc to a non-function sym in
2177 check_relocs. We can't decide accurately between function and
2178 non-function syms in check-relocs; Objects loaded later in
2179 the link may change h->type. So fix it now. */
2180 h
->plt
.offset
= (bfd_vma
) -1;
2182 /* If this is a weak symbol, and there is a real definition, the
2183 processor independent code will have arranged for us to see the
2184 real definition first, and we can just use the same value. */
2185 if (h
->u
.weakdef
!= NULL
)
2187 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2188 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2189 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2190 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2191 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2192 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2196 /* This is a reference to a symbol defined by a dynamic object which
2197 is not a function. */
2199 /* If we are creating a shared library, we must presume that the
2200 only references to the symbol are via the global offset table.
2201 For such cases we need not do anything here; the relocations will
2202 be handled correctly by relocate_section. */
2206 /* If there are no references to this symbol that do not use the
2207 GOT, we don't need to generate a copy reloc. */
2208 if (!h
->non_got_ref
)
2211 /* If -z nocopyreloc was given, we won't generate them either. */
2212 if (info
->nocopyreloc
)
2218 if (ELIMINATE_COPY_RELOCS
)
2220 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2221 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2223 s
= p
->sec
->output_section
;
2224 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2228 /* If we didn't find any dynamic relocs in read-only sections, then
2229 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2237 /* We must allocate the symbol in our .dynbss section, which will
2238 become part of the .bss section of the executable. There will be
2239 an entry for this symbol in the .dynsym section. The dynamic
2240 object will contain position independent code, so all references
2241 from the dynamic object to this symbol will go through the global
2242 offset table. The dynamic linker will use the .dynsym entry to
2243 determine the address it must put in the global offset table, so
2244 both the dynamic object and the regular object will refer to the
2245 same memory location for the variable. */
2247 htab
= elf_x86_64_hash_table (info
);
2251 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2252 to copy the initial value out of the dynamic object and into the
2253 runtime process image. */
2254 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2256 const struct elf_backend_data
*bed
;
2257 bed
= get_elf_backend_data (info
->output_bfd
);
2258 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2264 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2267 /* Allocate space in .plt, .got and associated reloc sections for
2271 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2273 struct bfd_link_info
*info
;
2274 struct elf_x86_64_link_hash_table
*htab
;
2275 struct elf_x86_64_link_hash_entry
*eh
;
2276 struct elf_dyn_relocs
*p
;
2277 const struct elf_backend_data
*bed
;
2278 unsigned int plt_entry_size
;
2280 if (h
->root
.type
== bfd_link_hash_indirect
)
2283 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2285 info
= (struct bfd_link_info
*) inf
;
2286 htab
= elf_x86_64_hash_table (info
);
2289 bed
= get_elf_backend_data (info
->output_bfd
);
2290 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2292 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2293 here if it is defined and referenced in a non-shared object. */
2294 if (h
->type
== STT_GNU_IFUNC
2296 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2301 else if (htab
->elf
.dynamic_sections_created
2302 && h
->plt
.refcount
> 0)
2304 /* Make sure this symbol is output as a dynamic symbol.
2305 Undefined weak syms won't yet be marked as dynamic. */
2306 if (h
->dynindx
== -1
2307 && !h
->forced_local
)
2309 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2314 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2316 asection
*s
= htab
->elf
.splt
;
2318 /* If this is the first .plt entry, make room for the special
2321 s
->size
+= plt_entry_size
;
2323 h
->plt
.offset
= s
->size
;
2325 /* If this symbol is not defined in a regular file, and we are
2326 not generating a shared library, then set the symbol to this
2327 location in the .plt. This is required to make function
2328 pointers compare as equal between the normal executable and
2329 the shared library. */
2333 h
->root
.u
.def
.section
= s
;
2334 h
->root
.u
.def
.value
= h
->plt
.offset
;
2337 /* Make room for this entry. */
2338 s
->size
+= plt_entry_size
;
2340 /* We also need to make an entry in the .got.plt section, which
2341 will be placed in the .got section by the linker script. */
2342 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2344 /* We also need to make an entry in the .rela.plt section. */
2345 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2346 htab
->elf
.srelplt
->reloc_count
++;
2350 h
->plt
.offset
= (bfd_vma
) -1;
2356 h
->plt
.offset
= (bfd_vma
) -1;
2360 eh
->tlsdesc_got
= (bfd_vma
) -1;
2362 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2363 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2364 if (h
->got
.refcount
> 0
2367 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2369 h
->got
.offset
= (bfd_vma
) -1;
2371 else if (h
->got
.refcount
> 0)
2375 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2377 /* Make sure this symbol is output as a dynamic symbol.
2378 Undefined weak syms won't yet be marked as dynamic. */
2379 if (h
->dynindx
== -1
2380 && !h
->forced_local
)
2382 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2386 if (GOT_TLS_GDESC_P (tls_type
))
2388 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2389 - elf_x86_64_compute_jump_table_size (htab
);
2390 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2391 h
->got
.offset
= (bfd_vma
) -2;
2393 if (! GOT_TLS_GDESC_P (tls_type
)
2394 || GOT_TLS_GD_P (tls_type
))
2397 h
->got
.offset
= s
->size
;
2398 s
->size
+= GOT_ENTRY_SIZE
;
2399 if (GOT_TLS_GD_P (tls_type
))
2400 s
->size
+= GOT_ENTRY_SIZE
;
2402 dyn
= htab
->elf
.dynamic_sections_created
;
2403 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2405 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2406 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2407 || tls_type
== GOT_TLS_IE
)
2408 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2409 else if (GOT_TLS_GD_P (tls_type
))
2410 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2411 else if (! GOT_TLS_GDESC_P (tls_type
)
2412 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2413 || h
->root
.type
!= bfd_link_hash_undefweak
)
2415 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2416 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2417 if (GOT_TLS_GDESC_P (tls_type
))
2419 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2420 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2424 h
->got
.offset
= (bfd_vma
) -1;
2426 if (eh
->dyn_relocs
== NULL
)
2429 /* In the shared -Bsymbolic case, discard space allocated for
2430 dynamic pc-relative relocs against symbols which turn out to be
2431 defined in regular objects. For the normal shared case, discard
2432 space for pc-relative relocs that have become local due to symbol
2433 visibility changes. */
2437 /* Relocs that use pc_count are those that appear on a call
2438 insn, or certain REL relocs that can generated via assembly.
2439 We want calls to protected symbols to resolve directly to the
2440 function rather than going via the plt. If people want
2441 function pointer comparisons to work as expected then they
2442 should avoid writing weird assembly. */
2443 if (SYMBOL_CALLS_LOCAL (info
, h
))
2445 struct elf_dyn_relocs
**pp
;
2447 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2449 p
->count
-= p
->pc_count
;
2458 /* Also discard relocs on undefined weak syms with non-default
2460 if (eh
->dyn_relocs
!= NULL
2461 && h
->root
.type
== bfd_link_hash_undefweak
)
2463 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2464 eh
->dyn_relocs
= NULL
;
2466 /* Make sure undefined weak symbols are output as a dynamic
2468 else if (h
->dynindx
== -1
2469 && ! h
->forced_local
2470 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2475 else if (ELIMINATE_COPY_RELOCS
)
2477 /* For the non-shared case, discard space for relocs against
2478 symbols which turn out to need copy relocs or are not
2484 || (htab
->elf
.dynamic_sections_created
2485 && (h
->root
.type
== bfd_link_hash_undefweak
2486 || h
->root
.type
== bfd_link_hash_undefined
))))
2488 /* Make sure this symbol is output as a dynamic symbol.
2489 Undefined weak syms won't yet be marked as dynamic. */
2490 if (h
->dynindx
== -1
2491 && ! h
->forced_local
2492 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2495 /* If that succeeded, we know we'll be keeping all the
2497 if (h
->dynindx
!= -1)
2501 eh
->dyn_relocs
= NULL
;
2506 /* Finally, allocate space. */
2507 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2511 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2513 BFD_ASSERT (sreloc
!= NULL
);
2515 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2521 /* Allocate space in .plt, .got and associated reloc sections for
2522 local dynamic relocs. */
2525 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2527 struct elf_link_hash_entry
*h
2528 = (struct elf_link_hash_entry
*) *slot
;
2530 if (h
->type
!= STT_GNU_IFUNC
2534 || h
->root
.type
!= bfd_link_hash_defined
)
2537 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2540 /* Find any dynamic relocs that apply to read-only sections. */
2543 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2546 struct elf_x86_64_link_hash_entry
*eh
;
2547 struct elf_dyn_relocs
*p
;
2549 /* Skip local IFUNC symbols. */
2550 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2553 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2554 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2556 asection
*s
= p
->sec
->output_section
;
2558 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2560 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2562 info
->flags
|= DF_TEXTREL
;
2564 if (info
->warn_shared_textrel
&& info
->shared
)
2565 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2566 p
->sec
->owner
, h
->root
.root
.string
,
2569 /* Not an error, just cut short the traversal. */
2577 mov foo@GOTPCREL(%rip), %reg
2580 with the local symbol, foo. */
2583 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2584 struct bfd_link_info
*link_info
)
2586 Elf_Internal_Shdr
*symtab_hdr
;
2587 Elf_Internal_Rela
*internal_relocs
;
2588 Elf_Internal_Rela
*irel
, *irelend
;
2590 struct elf_x86_64_link_hash_table
*htab
;
2591 bfd_boolean changed_contents
;
2592 bfd_boolean changed_relocs
;
2593 bfd_signed_vma
*local_got_refcounts
;
2595 /* Don't even try to convert non-ELF outputs. */
2596 if (!is_elf_hash_table (link_info
->hash
))
2599 /* Nothing to do if there are no codes, no relocations or no output. */
2600 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2601 || sec
->reloc_count
== 0
2602 || discarded_section (sec
))
2605 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2607 /* Load the relocations for this section. */
2608 internal_relocs
= (_bfd_elf_link_read_relocs
2609 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2610 link_info
->keep_memory
));
2611 if (internal_relocs
== NULL
)
2614 htab
= elf_x86_64_hash_table (link_info
);
2615 changed_contents
= FALSE
;
2616 changed_relocs
= FALSE
;
2617 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2619 /* Get the section contents. */
2620 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2621 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2624 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2628 irelend
= internal_relocs
+ sec
->reloc_count
;
2629 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2631 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2632 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2634 struct elf_link_hash_entry
*h
;
2636 if (r_type
!= R_X86_64_GOTPCREL
)
2639 /* Get the symbol referred to by the reloc. */
2640 if (r_symndx
< symtab_hdr
->sh_info
)
2642 Elf_Internal_Sym
*isym
;
2644 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2647 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2648 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2649 && bfd_get_8 (input_bfd
,
2650 contents
+ irel
->r_offset
- 2) == 0x8b)
2652 bfd_put_8 (output_bfd
, 0x8d,
2653 contents
+ irel
->r_offset
- 2);
2654 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2655 if (local_got_refcounts
!= NULL
2656 && local_got_refcounts
[r_symndx
] > 0)
2657 local_got_refcounts
[r_symndx
] -= 1;
2658 changed_contents
= TRUE
;
2659 changed_relocs
= TRUE
;
2664 indx
= r_symndx
- symtab_hdr
->sh_info
;
2665 h
= elf_sym_hashes (abfd
)[indx
];
2666 BFD_ASSERT (h
!= NULL
);
2668 while (h
->root
.type
== bfd_link_hash_indirect
2669 || h
->root
.type
== bfd_link_hash_warning
)
2670 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2672 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2673 avoid optimizing _DYNAMIC since ld.so may use its link-time
2676 && h
->type
!= STT_GNU_IFUNC
2677 && h
!= htab
->elf
.hdynamic
2678 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2679 && bfd_get_8 (input_bfd
,
2680 contents
+ irel
->r_offset
- 2) == 0x8b)
2682 bfd_put_8 (output_bfd
, 0x8d,
2683 contents
+ irel
->r_offset
- 2);
2684 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2685 if (h
->got
.refcount
> 0)
2686 h
->got
.refcount
-= 1;
2687 changed_contents
= TRUE
;
2688 changed_relocs
= TRUE
;
2692 if (contents
!= NULL
2693 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2695 if (!changed_contents
&& !link_info
->keep_memory
)
2699 /* Cache the section contents for elf_link_input_bfd. */
2700 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2704 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2706 if (!changed_relocs
)
2707 free (internal_relocs
);
2709 elf_section_data (sec
)->relocs
= internal_relocs
;
2715 if (contents
!= NULL
2716 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2718 if (internal_relocs
!= NULL
2719 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2720 free (internal_relocs
);
2724 /* Set the sizes of the dynamic sections. */
2727 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
2728 struct bfd_link_info
*info
)
2730 struct elf_x86_64_link_hash_table
*htab
;
2735 const struct elf_backend_data
*bed
;
2737 htab
= elf_x86_64_hash_table (info
);
2740 bed
= get_elf_backend_data (output_bfd
);
2742 dynobj
= htab
->elf
.dynobj
;
2746 if (htab
->elf
.dynamic_sections_created
)
2748 /* Set the contents of the .interp section to the interpreter. */
2749 if (info
->executable
)
2751 s
= bfd_get_linker_section (dynobj
, ".interp");
2754 s
->size
= htab
->dynamic_interpreter_size
;
2755 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
2759 /* Set up .got offsets for local syms, and space for local dynamic
2761 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2763 bfd_signed_vma
*local_got
;
2764 bfd_signed_vma
*end_local_got
;
2765 char *local_tls_type
;
2766 bfd_vma
*local_tlsdesc_gotent
;
2767 bfd_size_type locsymcount
;
2768 Elf_Internal_Shdr
*symtab_hdr
;
2771 if (! is_x86_64_elf (ibfd
))
2774 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2776 struct elf_dyn_relocs
*p
;
2778 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
2781 for (p
= (struct elf_dyn_relocs
*)
2782 (elf_section_data (s
)->local_dynrel
);
2786 if (!bfd_is_abs_section (p
->sec
)
2787 && bfd_is_abs_section (p
->sec
->output_section
))
2789 /* Input section has been discarded, either because
2790 it is a copy of a linkonce section or due to
2791 linker script /DISCARD/, so we'll be discarding
2794 else if (p
->count
!= 0)
2796 srel
= elf_section_data (p
->sec
)->sreloc
;
2797 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2798 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2799 && (info
->flags
& DF_TEXTREL
) == 0)
2801 info
->flags
|= DF_TEXTREL
;
2802 if (info
->warn_shared_textrel
&& info
->shared
)
2803 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2804 p
->sec
->owner
, p
->sec
);
2810 local_got
= elf_local_got_refcounts (ibfd
);
2814 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2815 locsymcount
= symtab_hdr
->sh_info
;
2816 end_local_got
= local_got
+ locsymcount
;
2817 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
2818 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
2820 srel
= htab
->elf
.srelgot
;
2821 for (; local_got
< end_local_got
;
2822 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2824 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2827 if (GOT_TLS_GDESC_P (*local_tls_type
))
2829 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2830 - elf_x86_64_compute_jump_table_size (htab
);
2831 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2832 *local_got
= (bfd_vma
) -2;
2834 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2835 || GOT_TLS_GD_P (*local_tls_type
))
2837 *local_got
= s
->size
;
2838 s
->size
+= GOT_ENTRY_SIZE
;
2839 if (GOT_TLS_GD_P (*local_tls_type
))
2840 s
->size
+= GOT_ENTRY_SIZE
;
2843 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2844 || *local_tls_type
== GOT_TLS_IE
)
2846 if (GOT_TLS_GDESC_P (*local_tls_type
))
2848 htab
->elf
.srelplt
->size
2849 += bed
->s
->sizeof_rela
;
2850 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2852 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2853 || GOT_TLS_GD_P (*local_tls_type
))
2854 srel
->size
+= bed
->s
->sizeof_rela
;
2858 *local_got
= (bfd_vma
) -1;
2862 if (htab
->tls_ld_got
.refcount
> 0)
2864 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2866 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
2867 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
2868 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2871 htab
->tls_ld_got
.offset
= -1;
2873 /* Allocate global sym .plt and .got entries, and space for global
2874 sym dynamic relocs. */
2875 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
2878 /* Allocate .plt and .got entries, and space for local symbols. */
2879 htab_traverse (htab
->loc_hash_table
,
2880 elf_x86_64_allocate_local_dynrelocs
,
2883 /* For every jump slot reserved in the sgotplt, reloc_count is
2884 incremented. However, when we reserve space for TLS descriptors,
2885 it's not incremented, so in order to compute the space reserved
2886 for them, it suffices to multiply the reloc count by the jump
2889 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2890 so that R_X86_64_IRELATIVE entries come last. */
2891 if (htab
->elf
.srelplt
)
2893 htab
->sgotplt_jump_table_size
2894 = elf_x86_64_compute_jump_table_size (htab
);
2895 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2897 else if (htab
->elf
.irelplt
)
2898 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2900 if (htab
->tlsdesc_plt
)
2902 /* If we're not using lazy TLS relocations, don't generate the
2903 PLT and GOT entries they require. */
2904 if ((info
->flags
& DF_BIND_NOW
))
2905 htab
->tlsdesc_plt
= 0;
2908 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
2909 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
2910 /* Reserve room for the initial entry.
2911 FIXME: we could probably do away with it in this case. */
2912 if (htab
->elf
.splt
->size
== 0)
2913 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
2914 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
2915 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
2919 if (htab
->elf
.sgotplt
)
2921 /* Don't allocate .got.plt section if there are no GOT nor PLT
2922 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2923 if ((htab
->elf
.hgot
== NULL
2924 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2925 && (htab
->elf
.sgotplt
->size
2926 == get_elf_backend_data (output_bfd
)->got_header_size
)
2927 && (htab
->elf
.splt
== NULL
2928 || htab
->elf
.splt
->size
== 0)
2929 && (htab
->elf
.sgot
== NULL
2930 || htab
->elf
.sgot
->size
== 0)
2931 && (htab
->elf
.iplt
== NULL
2932 || htab
->elf
.iplt
->size
== 0)
2933 && (htab
->elf
.igotplt
== NULL
2934 || htab
->elf
.igotplt
->size
== 0))
2935 htab
->elf
.sgotplt
->size
= 0;
2938 if (htab
->plt_eh_frame
!= NULL
2939 && htab
->elf
.splt
!= NULL
2940 && htab
->elf
.splt
->size
!= 0
2941 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2942 && _bfd_elf_eh_frame_present (info
))
2944 const struct elf_x86_64_backend_data
*arch_data
2945 = get_elf_x86_64_arch_data (bed
);
2946 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
2949 /* We now have determined the sizes of the various dynamic sections.
2950 Allocate memory for them. */
2952 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2954 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2957 if (s
== htab
->elf
.splt
2958 || s
== htab
->elf
.sgot
2959 || s
== htab
->elf
.sgotplt
2960 || s
== htab
->elf
.iplt
2961 || s
== htab
->elf
.igotplt
2962 || s
== htab
->plt_eh_frame
2963 || s
== htab
->sdynbss
)
2965 /* Strip this section if we don't need it; see the
2968 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2970 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
2973 /* We use the reloc_count field as a counter if we need
2974 to copy relocs into the output file. */
2975 if (s
!= htab
->elf
.srelplt
)
2980 /* It's not one of our sections, so don't allocate space. */
2986 /* If we don't need this section, strip it from the
2987 output file. This is mostly to handle .rela.bss and
2988 .rela.plt. We must create both sections in
2989 create_dynamic_sections, because they must be created
2990 before the linker maps input sections to output
2991 sections. The linker does that before
2992 adjust_dynamic_symbol is called, and it is that
2993 function which decides whether anything needs to go
2994 into these sections. */
2996 s
->flags
|= SEC_EXCLUDE
;
3000 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3003 /* Allocate memory for the section contents. We use bfd_zalloc
3004 here in case unused entries are not reclaimed before the
3005 section's contents are written out. This should not happen,
3006 but this way if it does, we get a R_X86_64_NONE reloc instead
3008 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3009 if (s
->contents
== NULL
)
3013 if (htab
->plt_eh_frame
!= NULL
3014 && htab
->plt_eh_frame
->contents
!= NULL
)
3016 const struct elf_x86_64_backend_data
*arch_data
3017 = get_elf_x86_64_arch_data (bed
);
3019 memcpy (htab
->plt_eh_frame
->contents
,
3020 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3021 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3022 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3025 if (htab
->elf
.dynamic_sections_created
)
3027 /* Add some entries to the .dynamic section. We fill in the
3028 values later, in elf_x86_64_finish_dynamic_sections, but we
3029 must add the entries now so that we get the correct size for
3030 the .dynamic section. The DT_DEBUG entry is filled in by the
3031 dynamic linker and used by the debugger. */
3032 #define add_dynamic_entry(TAG, VAL) \
3033 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3035 if (info
->executable
)
3037 if (!add_dynamic_entry (DT_DEBUG
, 0))
3041 if (htab
->elf
.splt
->size
!= 0)
3043 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3044 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3045 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3046 || !add_dynamic_entry (DT_JMPREL
, 0))
3049 if (htab
->tlsdesc_plt
3050 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3051 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3057 if (!add_dynamic_entry (DT_RELA
, 0)
3058 || !add_dynamic_entry (DT_RELASZ
, 0)
3059 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3062 /* If any dynamic relocs apply to a read-only section,
3063 then we need a DT_TEXTREL entry. */
3064 if ((info
->flags
& DF_TEXTREL
) == 0)
3065 elf_link_hash_traverse (&htab
->elf
,
3066 elf_x86_64_readonly_dynrelocs
,
3069 if ((info
->flags
& DF_TEXTREL
) != 0)
3071 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3076 #undef add_dynamic_entry
3082 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3083 struct bfd_link_info
*info
)
3085 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3089 struct elf_link_hash_entry
*tlsbase
;
3091 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3092 "_TLS_MODULE_BASE_",
3093 FALSE
, FALSE
, FALSE
);
3095 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3097 struct elf_x86_64_link_hash_table
*htab
;
3098 struct bfd_link_hash_entry
*bh
= NULL
;
3099 const struct elf_backend_data
*bed
3100 = get_elf_backend_data (output_bfd
);
3102 htab
= elf_x86_64_hash_table (info
);
3106 if (!(_bfd_generic_link_add_one_symbol
3107 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3108 tls_sec
, 0, NULL
, FALSE
,
3109 bed
->collect
, &bh
)))
3112 htab
->tls_module_base
= bh
;
3114 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3115 tlsbase
->def_regular
= 1;
3116 tlsbase
->other
= STV_HIDDEN
;
3117 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3124 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3125 executables. Rather than setting it to the beginning of the TLS
3126 section, we have to set it to the end. This function may be called
3127 multiple times, it is idempotent. */
3130 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3132 struct elf_x86_64_link_hash_table
*htab
;
3133 struct bfd_link_hash_entry
*base
;
3135 if (!info
->executable
)
3138 htab
= elf_x86_64_hash_table (info
);
3142 base
= htab
->tls_module_base
;
3146 base
->u
.def
.value
= htab
->elf
.tls_size
;
3149 /* Return the base VMA address which should be subtracted from real addresses
3150 when resolving @dtpoff relocation.
3151 This is PT_TLS segment p_vaddr. */
3154 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3156 /* If tls_sec is NULL, we should have signalled an error already. */
3157 if (elf_hash_table (info
)->tls_sec
== NULL
)
3159 return elf_hash_table (info
)->tls_sec
->vma
;
3162 /* Return the relocation value for @tpoff relocation
3163 if STT_TLS virtual address is ADDRESS. */
3166 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3168 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3169 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3170 bfd_vma static_tls_size
;
3172 /* If tls_segment is NULL, we should have signalled an error already. */
3173 if (htab
->tls_sec
== NULL
)
3176 /* Consider special static TLS alignment requirements. */
3177 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3178 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3181 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3185 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3187 /* Opcode Instruction
3190 0x0f 0x8x conditional jump */
3192 && (contents
[offset
- 1] == 0xe8
3193 || contents
[offset
- 1] == 0xe9))
3195 && contents
[offset
- 2] == 0x0f
3196 && (contents
[offset
- 1] & 0xf0) == 0x80));
3199 /* Relocate an x86_64 ELF section. */
3202 elf_x86_64_relocate_section (bfd
*output_bfd
,
3203 struct bfd_link_info
*info
,
3205 asection
*input_section
,
3207 Elf_Internal_Rela
*relocs
,
3208 Elf_Internal_Sym
*local_syms
,
3209 asection
**local_sections
)
3211 struct elf_x86_64_link_hash_table
*htab
;
3212 Elf_Internal_Shdr
*symtab_hdr
;
3213 struct elf_link_hash_entry
**sym_hashes
;
3214 bfd_vma
*local_got_offsets
;
3215 bfd_vma
*local_tlsdesc_gotents
;
3216 Elf_Internal_Rela
*rel
;
3217 Elf_Internal_Rela
*relend
;
3218 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3220 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3222 htab
= elf_x86_64_hash_table (info
);
3225 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3226 sym_hashes
= elf_sym_hashes (input_bfd
);
3227 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3228 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3230 elf_x86_64_set_tls_module_base (info
);
3233 relend
= relocs
+ input_section
->reloc_count
;
3234 for (; rel
< relend
; rel
++)
3236 unsigned int r_type
;
3237 reloc_howto_type
*howto
;
3238 unsigned long r_symndx
;
3239 struct elf_link_hash_entry
*h
;
3240 Elf_Internal_Sym
*sym
;
3242 bfd_vma off
, offplt
;
3244 bfd_boolean unresolved_reloc
;
3245 bfd_reloc_status_type r
;
3250 r_type
= ELF32_R_TYPE (rel
->r_info
);
3251 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3252 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3255 if (r_type
>= (int) R_X86_64_standard
)
3257 (*_bfd_error_handler
)
3258 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3259 input_bfd
, input_section
, r_type
);
3260 bfd_set_error (bfd_error_bad_value
);
3264 if (r_type
!= (int) R_X86_64_32
3265 || ABI_64_P (output_bfd
))
3266 howto
= x86_64_elf_howto_table
+ r_type
;
3268 howto
= (x86_64_elf_howto_table
3269 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3270 r_symndx
= htab
->r_sym (rel
->r_info
);
3274 unresolved_reloc
= FALSE
;
3275 if (r_symndx
< symtab_hdr
->sh_info
)
3277 sym
= local_syms
+ r_symndx
;
3278 sec
= local_sections
[r_symndx
];
3280 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3282 st_size
= sym
->st_size
;
3284 /* Relocate against local STT_GNU_IFUNC symbol. */
3285 if (!info
->relocatable
3286 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3288 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3293 /* Set STT_GNU_IFUNC symbol value. */
3294 h
->root
.u
.def
.value
= sym
->st_value
;
3295 h
->root
.u
.def
.section
= sec
;
3300 bfd_boolean warned ATTRIBUTE_UNUSED
;
3302 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3303 r_symndx
, symtab_hdr
, sym_hashes
,
3305 unresolved_reloc
, warned
);
3309 if (sec
!= NULL
&& discarded_section (sec
))
3310 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3311 rel
, 1, relend
, howto
, 0, contents
);
3313 if (info
->relocatable
)
3316 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3318 if (r_type
== R_X86_64_64
)
3320 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3321 zero-extend it to 64bit if addend is zero. */
3322 r_type
= R_X86_64_32
;
3323 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3325 else if (r_type
== R_X86_64_SIZE64
)
3327 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3328 zero-extend it to 64bit if addend is zero. */
3329 r_type
= R_X86_64_SIZE32
;
3330 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3334 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3335 it here if it is defined in a non-shared object. */
3337 && h
->type
== STT_GNU_IFUNC
3344 if ((input_section
->flags
& SEC_ALLOC
) == 0
3345 || h
->plt
.offset
== (bfd_vma
) -1)
3348 /* STT_GNU_IFUNC symbol must go through PLT. */
3349 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
3350 relocation
= (plt
->output_section
->vma
3351 + plt
->output_offset
+ h
->plt
.offset
);
3356 if (h
->root
.root
.string
)
3357 name
= h
->root
.root
.string
;
3359 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3361 (*_bfd_error_handler
)
3362 (_("%B: relocation %s against STT_GNU_IFUNC "
3363 "symbol `%s' isn't handled by %s"), input_bfd
,
3364 x86_64_elf_howto_table
[r_type
].name
,
3365 name
, __FUNCTION__
);
3366 bfd_set_error (bfd_error_bad_value
);
3375 if (ABI_64_P (output_bfd
))
3379 if (rel
->r_addend
!= 0)
3381 if (h
->root
.root
.string
)
3382 name
= h
->root
.root
.string
;
3384 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3386 (*_bfd_error_handler
)
3387 (_("%B: relocation %s against STT_GNU_IFUNC "
3388 "symbol `%s' has non-zero addend: %d"),
3389 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3390 name
, rel
->r_addend
);
3391 bfd_set_error (bfd_error_bad_value
);
3395 /* Generate dynamic relcoation only when there is a
3396 non-GOT reference in a shared object. */
3397 if (info
->shared
&& h
->non_got_ref
)
3399 Elf_Internal_Rela outrel
;
3402 /* Need a dynamic relocation to get the real function
3404 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3408 if (outrel
.r_offset
== (bfd_vma
) -1
3409 || outrel
.r_offset
== (bfd_vma
) -2)
3412 outrel
.r_offset
+= (input_section
->output_section
->vma
3413 + input_section
->output_offset
);
3415 if (h
->dynindx
== -1
3417 || info
->executable
)
3419 /* This symbol is resolved locally. */
3420 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3421 outrel
.r_addend
= (h
->root
.u
.def
.value
3422 + h
->root
.u
.def
.section
->output_section
->vma
3423 + h
->root
.u
.def
.section
->output_offset
);
3427 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3428 outrel
.r_addend
= 0;
3431 sreloc
= htab
->elf
.irelifunc
;
3432 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3434 /* If this reloc is against an external symbol, we
3435 do not want to fiddle with the addend. Otherwise,
3436 we need to include the symbol value so that it
3437 becomes an addend for the dynamic reloc. For an
3438 internal symbol, we have updated addend. */
3444 case R_X86_64_PLT32
:
3447 case R_X86_64_GOTPCREL
:
3448 case R_X86_64_GOTPCREL64
:
3449 base_got
= htab
->elf
.sgot
;
3450 off
= h
->got
.offset
;
3452 if (base_got
== NULL
)
3455 if (off
== (bfd_vma
) -1)
3457 /* We can't use h->got.offset here to save state, or
3458 even just remember the offset, as finish_dynamic_symbol
3459 would use that as offset into .got. */
3461 if (htab
->elf
.splt
!= NULL
)
3463 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3464 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3465 base_got
= htab
->elf
.sgotplt
;
3469 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3470 off
= plt_index
* GOT_ENTRY_SIZE
;
3471 base_got
= htab
->elf
.igotplt
;
3474 if (h
->dynindx
== -1
3478 /* This references the local defitionion. We must
3479 initialize this entry in the global offset table.
3480 Since the offset must always be a multiple of 8,
3481 we use the least significant bit to record
3482 whether we have initialized it already.
3484 When doing a dynamic link, we create a .rela.got
3485 relocation entry to initialize the value. This
3486 is done in the finish_dynamic_symbol routine. */
3491 bfd_put_64 (output_bfd
, relocation
,
3492 base_got
->contents
+ off
);
3493 /* Note that this is harmless for the GOTPLT64
3494 case, as -1 | 1 still is -1. */
3500 relocation
= (base_got
->output_section
->vma
3501 + base_got
->output_offset
+ off
);
3507 /* When generating a shared object, the relocations handled here are
3508 copied into the output file to be resolved at run time. */
3511 case R_X86_64_GOT32
:
3512 case R_X86_64_GOT64
:
3513 /* Relocation is to the entry for this symbol in the global
3515 case R_X86_64_GOTPCREL
:
3516 case R_X86_64_GOTPCREL64
:
3517 /* Use global offset table entry as symbol value. */
3518 case R_X86_64_GOTPLT64
:
3519 /* This is the same as GOT64 for relocation purposes, but
3520 indicates the existence of a PLT entry. The difficulty is,
3521 that we must calculate the GOT slot offset from the PLT
3522 offset, if this symbol got a PLT entry (it was global).
3523 Additionally if it's computed from the PLT entry, then that
3524 GOT offset is relative to .got.plt, not to .got. */
3525 base_got
= htab
->elf
.sgot
;
3527 if (htab
->elf
.sgot
== NULL
)
3534 off
= h
->got
.offset
;
3536 && h
->plt
.offset
!= (bfd_vma
)-1
3537 && off
== (bfd_vma
)-1)
3539 /* We can't use h->got.offset here to save
3540 state, or even just remember the offset, as
3541 finish_dynamic_symbol would use that as offset into
3543 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3544 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3545 base_got
= htab
->elf
.sgotplt
;
3548 dyn
= htab
->elf
.dynamic_sections_created
;
3550 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3552 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3553 || (ELF_ST_VISIBILITY (h
->other
)
3554 && h
->root
.type
== bfd_link_hash_undefweak
))
3556 /* This is actually a static link, or it is a -Bsymbolic
3557 link and the symbol is defined locally, or the symbol
3558 was forced to be local because of a version file. We
3559 must initialize this entry in the global offset table.
3560 Since the offset must always be a multiple of 8, we
3561 use the least significant bit to record whether we
3562 have initialized it already.
3564 When doing a dynamic link, we create a .rela.got
3565 relocation entry to initialize the value. This is
3566 done in the finish_dynamic_symbol routine. */
3571 bfd_put_64 (output_bfd
, relocation
,
3572 base_got
->contents
+ off
);
3573 /* Note that this is harmless for the GOTPLT64 case,
3574 as -1 | 1 still is -1. */
3579 unresolved_reloc
= FALSE
;
3583 if (local_got_offsets
== NULL
)
3586 off
= local_got_offsets
[r_symndx
];
3588 /* The offset must always be a multiple of 8. We use
3589 the least significant bit to record whether we have
3590 already generated the necessary reloc. */
3595 bfd_put_64 (output_bfd
, relocation
,
3596 base_got
->contents
+ off
);
3601 Elf_Internal_Rela outrel
;
3603 /* We need to generate a R_X86_64_RELATIVE reloc
3604 for the dynamic linker. */
3605 s
= htab
->elf
.srelgot
;
3609 outrel
.r_offset
= (base_got
->output_section
->vma
3610 + base_got
->output_offset
3612 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3613 outrel
.r_addend
= relocation
;
3614 elf_append_rela (output_bfd
, s
, &outrel
);
3617 local_got_offsets
[r_symndx
] |= 1;
3621 if (off
>= (bfd_vma
) -2)
3624 relocation
= base_got
->output_section
->vma
3625 + base_got
->output_offset
+ off
;
3626 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
3627 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3628 - htab
->elf
.sgotplt
->output_offset
;
3632 case R_X86_64_GOTOFF64
:
3633 /* Relocation is relative to the start of the global offset
3636 /* Check to make sure it isn't a protected function symbol
3637 for shared library since it may not be local when used
3638 as function address. */
3639 if (!info
->executable
3641 && !SYMBOLIC_BIND (info
, h
)
3643 && h
->type
== STT_FUNC
3644 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3646 (*_bfd_error_handler
)
3647 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3648 input_bfd
, h
->root
.root
.string
);
3649 bfd_set_error (bfd_error_bad_value
);
3653 /* Note that sgot is not involved in this
3654 calculation. We always want the start of .got.plt. If we
3655 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3656 permitted by the ABI, we might have to change this
3658 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3659 + htab
->elf
.sgotplt
->output_offset
;
3662 case R_X86_64_GOTPC32
:
3663 case R_X86_64_GOTPC64
:
3664 /* Use global offset table as symbol value. */
3665 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3666 + htab
->elf
.sgotplt
->output_offset
;
3667 unresolved_reloc
= FALSE
;
3670 case R_X86_64_PLTOFF64
:
3671 /* Relocation is PLT entry relative to GOT. For local
3672 symbols it's the symbol itself relative to GOT. */
3674 /* See PLT32 handling. */
3675 && h
->plt
.offset
!= (bfd_vma
) -1
3676 && htab
->elf
.splt
!= NULL
)
3678 relocation
= (htab
->elf
.splt
->output_section
->vma
3679 + htab
->elf
.splt
->output_offset
3681 unresolved_reloc
= FALSE
;
3684 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3685 + htab
->elf
.sgotplt
->output_offset
;
3688 case R_X86_64_PLT32
:
3689 /* Relocation is to the entry for this symbol in the
3690 procedure linkage table. */
3692 /* Resolve a PLT32 reloc against a local symbol directly,
3693 without using the procedure linkage table. */
3697 if (h
->plt
.offset
== (bfd_vma
) -1
3698 || htab
->elf
.splt
== NULL
)
3700 /* We didn't make a PLT entry for this symbol. This
3701 happens when statically linking PIC code, or when
3702 using -Bsymbolic. */
3706 relocation
= (htab
->elf
.splt
->output_section
->vma
3707 + htab
->elf
.splt
->output_offset
3709 unresolved_reloc
= FALSE
;
3712 case R_X86_64_SIZE32
:
3713 case R_X86_64_SIZE64
:
3714 /* Set to symbol size. */
3715 relocation
= st_size
;
3722 && (input_section
->flags
& SEC_ALLOC
) != 0
3723 && (input_section
->flags
& SEC_READONLY
) != 0
3726 bfd_boolean fail
= FALSE
;
3728 = (r_type
== R_X86_64_PC32
3729 && is_32bit_relative_branch (contents
, rel
->r_offset
));
3731 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
3733 /* Symbol is referenced locally. Make sure it is
3734 defined locally or for a branch. */
3735 fail
= !h
->def_regular
&& !branch
;
3739 /* Symbol isn't referenced locally. We only allow
3740 branch to symbol with non-default visibility. */
3742 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
3749 const char *pic
= "";
3751 switch (ELF_ST_VISIBILITY (h
->other
))
3754 v
= _("hidden symbol");
3757 v
= _("internal symbol");
3760 v
= _("protected symbol");
3764 pic
= _("; recompile with -fPIC");
3769 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3771 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3773 (*_bfd_error_handler
) (fmt
, input_bfd
,
3774 x86_64_elf_howto_table
[r_type
].name
,
3775 v
, h
->root
.root
.string
, pic
);
3776 bfd_set_error (bfd_error_bad_value
);
3787 /* FIXME: The ABI says the linker should make sure the value is
3788 the same when it's zeroextended to 64 bit. */
3791 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3796 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3797 || h
->root
.type
!= bfd_link_hash_undefweak
)
3798 && ((! IS_X86_64_PCREL_TYPE (r_type
)
3799 && r_type
!= R_X86_64_SIZE32
3800 && r_type
!= R_X86_64_SIZE64
)
3801 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
3802 || (ELIMINATE_COPY_RELOCS
3809 || h
->root
.type
== bfd_link_hash_undefweak
3810 || h
->root
.type
== bfd_link_hash_undefined
)))
3812 Elf_Internal_Rela outrel
;
3813 bfd_boolean skip
, relocate
;
3816 /* When generating a shared object, these relocations
3817 are copied into the output file to be resolved at run
3823 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3825 if (outrel
.r_offset
== (bfd_vma
) -1)
3827 else if (outrel
.r_offset
== (bfd_vma
) -2)
3828 skip
= TRUE
, relocate
= TRUE
;
3830 outrel
.r_offset
+= (input_section
->output_section
->vma
3831 + input_section
->output_offset
);
3834 memset (&outrel
, 0, sizeof outrel
);
3836 /* h->dynindx may be -1 if this symbol was marked to
3840 && (IS_X86_64_PCREL_TYPE (r_type
)
3842 || ! SYMBOLIC_BIND (info
, h
)
3843 || ! h
->def_regular
))
3845 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3846 outrel
.r_addend
= rel
->r_addend
;
3850 /* This symbol is local, or marked to become local. */
3851 if (r_type
== htab
->pointer_r_type
)
3854 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3855 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3857 else if (r_type
== R_X86_64_64
3858 && !ABI_64_P (output_bfd
))
3861 outrel
.r_info
= htab
->r_info (0,
3862 R_X86_64_RELATIVE64
);
3863 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3864 /* Check addend overflow. */
3865 if ((outrel
.r_addend
& 0x80000000)
3866 != (rel
->r_addend
& 0x80000000))
3869 int addend
= rel
->r_addend
;
3870 if (h
&& h
->root
.root
.string
)
3871 name
= h
->root
.root
.string
;
3873 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3876 (*_bfd_error_handler
)
3877 (_("%B: addend -0x%x in relocation %s against "
3878 "symbol `%s' at 0x%lx in section `%A' is "
3880 input_bfd
, input_section
, addend
,
3881 x86_64_elf_howto_table
[r_type
].name
,
3882 name
, (unsigned long) rel
->r_offset
);
3884 (*_bfd_error_handler
)
3885 (_("%B: addend 0x%x in relocation %s against "
3886 "symbol `%s' at 0x%lx in section `%A' is "
3888 input_bfd
, input_section
, addend
,
3889 x86_64_elf_howto_table
[r_type
].name
,
3890 name
, (unsigned long) rel
->r_offset
);
3891 bfd_set_error (bfd_error_bad_value
);
3899 if (bfd_is_abs_section (sec
))
3901 else if (sec
== NULL
|| sec
->owner
== NULL
)
3903 bfd_set_error (bfd_error_bad_value
);
3910 /* We are turning this relocation into one
3911 against a section symbol. It would be
3912 proper to subtract the symbol's value,
3913 osec->vma, from the emitted reloc addend,
3914 but ld.so expects buggy relocs. */
3915 osec
= sec
->output_section
;
3916 sindx
= elf_section_data (osec
)->dynindx
;
3919 asection
*oi
= htab
->elf
.text_index_section
;
3920 sindx
= elf_section_data (oi
)->dynindx
;
3922 BFD_ASSERT (sindx
!= 0);
3925 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3926 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3930 sreloc
= elf_section_data (input_section
)->sreloc
;
3932 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3934 r
= bfd_reloc_notsupported
;
3935 goto check_relocation_error
;
3938 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3940 /* If this reloc is against an external symbol, we do
3941 not want to fiddle with the addend. Otherwise, we
3942 need to include the symbol value so that it becomes
3943 an addend for the dynamic reloc. */
3950 case R_X86_64_TLSGD
:
3951 case R_X86_64_GOTPC32_TLSDESC
:
3952 case R_X86_64_TLSDESC_CALL
:
3953 case R_X86_64_GOTTPOFF
:
3954 tls_type
= GOT_UNKNOWN
;
3955 if (h
== NULL
&& local_got_offsets
)
3956 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
3958 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
3960 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3961 input_section
, contents
,
3962 symtab_hdr
, sym_hashes
,
3963 &r_type
, tls_type
, rel
,
3964 relend
, h
, r_symndx
))
3967 if (r_type
== R_X86_64_TPOFF32
)
3969 bfd_vma roff
= rel
->r_offset
;
3971 BFD_ASSERT (! unresolved_reloc
);
3973 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
3975 /* GD->LE transition. For 64bit, change
3976 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3977 .word 0x6666; rex64; call __tls_get_addr
3980 leaq foo@tpoff(%rax), %rax
3982 leaq foo@tlsgd(%rip), %rdi
3983 .word 0x6666; rex64; call __tls_get_addr
3986 leaq foo@tpoff(%rax), %rax
3987 For largepic, change:
3988 leaq foo@tlsgd(%rip), %rdi
3989 movabsq $__tls_get_addr@pltoff, %rax
3994 leaq foo@tpoff(%rax), %rax
3995 nopw 0x0(%rax,%rax,1) */
3997 if (ABI_64_P (output_bfd
)
3998 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4000 memcpy (contents
+ roff
- 3,
4001 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4002 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4005 else if (ABI_64_P (output_bfd
))
4006 memcpy (contents
+ roff
- 4,
4007 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4010 memcpy (contents
+ roff
- 3,
4011 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4013 bfd_put_32 (output_bfd
,
4014 elf_x86_64_tpoff (info
, relocation
),
4015 contents
+ roff
+ 8 + largepic
);
4016 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4020 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4022 /* GDesc -> LE transition.
4023 It's originally something like:
4024 leaq x@tlsdesc(%rip), %rax
4027 movl $x@tpoff, %rax. */
4029 unsigned int val
, type
;
4031 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4032 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4033 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4034 contents
+ roff
- 3);
4035 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4036 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4037 contents
+ roff
- 1);
4038 bfd_put_32 (output_bfd
,
4039 elf_x86_64_tpoff (info
, relocation
),
4043 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4045 /* GDesc -> LE transition.
4050 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4051 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4054 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4056 /* IE->LE transition:
4057 Originally it can be one of:
4058 movq foo@gottpoff(%rip), %reg
4059 addq foo@gottpoff(%rip), %reg
4062 leaq foo(%reg), %reg
4065 unsigned int val
, type
, reg
;
4067 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4068 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4069 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4075 bfd_put_8 (output_bfd
, 0x49,
4076 contents
+ roff
- 3);
4077 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4078 bfd_put_8 (output_bfd
, 0x41,
4079 contents
+ roff
- 3);
4080 bfd_put_8 (output_bfd
, 0xc7,
4081 contents
+ roff
- 2);
4082 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4083 contents
+ roff
- 1);
4087 /* addq -> addq - addressing with %rsp/%r12 is
4090 bfd_put_8 (output_bfd
, 0x49,
4091 contents
+ roff
- 3);
4092 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4093 bfd_put_8 (output_bfd
, 0x41,
4094 contents
+ roff
- 3);
4095 bfd_put_8 (output_bfd
, 0x81,
4096 contents
+ roff
- 2);
4097 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4098 contents
+ roff
- 1);
4104 bfd_put_8 (output_bfd
, 0x4d,
4105 contents
+ roff
- 3);
4106 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4107 bfd_put_8 (output_bfd
, 0x45,
4108 contents
+ roff
- 3);
4109 bfd_put_8 (output_bfd
, 0x8d,
4110 contents
+ roff
- 2);
4111 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4112 contents
+ roff
- 1);
4114 bfd_put_32 (output_bfd
,
4115 elf_x86_64_tpoff (info
, relocation
),
4123 if (htab
->elf
.sgot
== NULL
)
4128 off
= h
->got
.offset
;
4129 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4133 if (local_got_offsets
== NULL
)
4136 off
= local_got_offsets
[r_symndx
];
4137 offplt
= local_tlsdesc_gotents
[r_symndx
];
4144 Elf_Internal_Rela outrel
;
4148 if (htab
->elf
.srelgot
== NULL
)
4151 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4153 if (GOT_TLS_GDESC_P (tls_type
))
4155 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4156 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4157 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4158 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4159 + htab
->elf
.sgotplt
->output_offset
4161 + htab
->sgotplt_jump_table_size
);
4162 sreloc
= htab
->elf
.srelplt
;
4164 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4166 outrel
.r_addend
= 0;
4167 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4170 sreloc
= htab
->elf
.srelgot
;
4172 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4173 + htab
->elf
.sgot
->output_offset
+ off
);
4175 if (GOT_TLS_GD_P (tls_type
))
4176 dr_type
= R_X86_64_DTPMOD64
;
4177 else if (GOT_TLS_GDESC_P (tls_type
))
4180 dr_type
= R_X86_64_TPOFF64
;
4182 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4183 outrel
.r_addend
= 0;
4184 if ((dr_type
== R_X86_64_TPOFF64
4185 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4186 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4187 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4189 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4191 if (GOT_TLS_GD_P (tls_type
))
4195 BFD_ASSERT (! unresolved_reloc
);
4196 bfd_put_64 (output_bfd
,
4197 relocation
- elf_x86_64_dtpoff_base (info
),
4198 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4202 bfd_put_64 (output_bfd
, 0,
4203 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4204 outrel
.r_info
= htab
->r_info (indx
,
4206 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4207 elf_append_rela (output_bfd
, sreloc
,
4216 local_got_offsets
[r_symndx
] |= 1;
4219 if (off
>= (bfd_vma
) -2
4220 && ! GOT_TLS_GDESC_P (tls_type
))
4222 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4224 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4225 || r_type
== R_X86_64_TLSDESC_CALL
)
4226 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4227 + htab
->elf
.sgotplt
->output_offset
4228 + offplt
+ htab
->sgotplt_jump_table_size
;
4230 relocation
= htab
->elf
.sgot
->output_section
->vma
4231 + htab
->elf
.sgot
->output_offset
+ off
;
4232 unresolved_reloc
= FALSE
;
4236 bfd_vma roff
= rel
->r_offset
;
4238 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4240 /* GD->IE transition. For 64bit, change
4241 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4242 .word 0x6666; rex64; call __tls_get_addr@plt
4245 addq foo@gottpoff(%rip), %rax
4247 leaq foo@tlsgd(%rip), %rdi
4248 .word 0x6666; rex64; call __tls_get_addr@plt
4251 addq foo@gottpoff(%rip), %rax
4252 For largepic, change:
4253 leaq foo@tlsgd(%rip), %rdi
4254 movabsq $__tls_get_addr@pltoff, %rax
4259 addq foo@gottpoff(%rax), %rax
4260 nopw 0x0(%rax,%rax,1) */
4262 if (ABI_64_P (output_bfd
)
4263 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4265 memcpy (contents
+ roff
- 3,
4266 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4267 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4270 else if (ABI_64_P (output_bfd
))
4271 memcpy (contents
+ roff
- 4,
4272 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4275 memcpy (contents
+ roff
- 3,
4276 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4279 relocation
= (htab
->elf
.sgot
->output_section
->vma
4280 + htab
->elf
.sgot
->output_offset
+ off
4283 - input_section
->output_section
->vma
4284 - input_section
->output_offset
4286 bfd_put_32 (output_bfd
, relocation
,
4287 contents
+ roff
+ 8 + largepic
);
4288 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4292 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4294 /* GDesc -> IE transition.
4295 It's originally something like:
4296 leaq x@tlsdesc(%rip), %rax
4299 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4301 /* Now modify the instruction as appropriate. To
4302 turn a leaq into a movq in the form we use it, it
4303 suffices to change the second byte from 0x8d to
4305 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4307 bfd_put_32 (output_bfd
,
4308 htab
->elf
.sgot
->output_section
->vma
4309 + htab
->elf
.sgot
->output_offset
+ off
4311 - input_section
->output_section
->vma
4312 - input_section
->output_offset
4317 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4319 /* GDesc -> IE transition.
4326 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4327 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4335 case R_X86_64_TLSLD
:
4336 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4337 input_section
, contents
,
4338 symtab_hdr
, sym_hashes
,
4339 &r_type
, GOT_UNKNOWN
,
4340 rel
, relend
, h
, r_symndx
))
4343 if (r_type
!= R_X86_64_TLSLD
)
4345 /* LD->LE transition:
4346 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4347 For 64bit, we change it into:
4348 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4349 For 32bit, we change it into:
4350 nopl 0x0(%rax); movl %fs:0, %eax.
4351 For largepic, change:
4352 leaq foo@tlsgd(%rip), %rdi
4353 movabsq $__tls_get_addr@pltoff, %rax
4357 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4360 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4361 if (ABI_64_P (output_bfd
)
4362 && contents
[rel
->r_offset
+ 5] == (bfd_byte
) '\xb8')
4363 memcpy (contents
+ rel
->r_offset
- 3,
4364 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4365 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4366 else if (ABI_64_P (output_bfd
))
4367 memcpy (contents
+ rel
->r_offset
- 3,
4368 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4370 memcpy (contents
+ rel
->r_offset
- 3,
4371 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4372 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4377 if (htab
->elf
.sgot
== NULL
)
4380 off
= htab
->tls_ld_got
.offset
;
4385 Elf_Internal_Rela outrel
;
4387 if (htab
->elf
.srelgot
== NULL
)
4390 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4391 + htab
->elf
.sgot
->output_offset
+ off
);
4393 bfd_put_64 (output_bfd
, 0,
4394 htab
->elf
.sgot
->contents
+ off
);
4395 bfd_put_64 (output_bfd
, 0,
4396 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4397 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4398 outrel
.r_addend
= 0;
4399 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4401 htab
->tls_ld_got
.offset
|= 1;
4403 relocation
= htab
->elf
.sgot
->output_section
->vma
4404 + htab
->elf
.sgot
->output_offset
+ off
;
4405 unresolved_reloc
= FALSE
;
4408 case R_X86_64_DTPOFF32
:
4409 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4410 relocation
-= elf_x86_64_dtpoff_base (info
);
4412 relocation
= elf_x86_64_tpoff (info
, relocation
);
4415 case R_X86_64_TPOFF32
:
4416 case R_X86_64_TPOFF64
:
4417 BFD_ASSERT (info
->executable
);
4418 relocation
= elf_x86_64_tpoff (info
, relocation
);
4421 case R_X86_64_DTPOFF64
:
4422 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4423 relocation
-= elf_x86_64_dtpoff_base (info
);
4430 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4431 because such sections are not SEC_ALLOC and thus ld.so will
4432 not process them. */
4433 if (unresolved_reloc
4434 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4436 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4437 rel
->r_offset
) != (bfd_vma
) -1)
4439 (*_bfd_error_handler
)
4440 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4443 (long) rel
->r_offset
,
4445 h
->root
.root
.string
);
4450 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4451 contents
, rel
->r_offset
,
4452 relocation
, rel
->r_addend
);
4454 check_relocation_error
:
4455 if (r
!= bfd_reloc_ok
)
4460 name
= h
->root
.root
.string
;
4463 name
= bfd_elf_string_from_elf_section (input_bfd
,
4464 symtab_hdr
->sh_link
,
4469 name
= bfd_section_name (input_bfd
, sec
);
4472 if (r
== bfd_reloc_overflow
)
4474 if (! ((*info
->callbacks
->reloc_overflow
)
4475 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4476 (bfd_vma
) 0, input_bfd
, input_section
,
4482 (*_bfd_error_handler
)
4483 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4484 input_bfd
, input_section
,
4485 (long) rel
->r_offset
, name
, (int) r
);
4494 /* Finish up dynamic symbol handling. We set the contents of various
4495 dynamic sections here. */
4498 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4499 struct bfd_link_info
*info
,
4500 struct elf_link_hash_entry
*h
,
4501 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4503 struct elf_x86_64_link_hash_table
*htab
;
4504 const struct elf_x86_64_backend_data
*const abed
4505 = get_elf_x86_64_backend_data (output_bfd
);
4507 htab
= elf_x86_64_hash_table (info
);
4511 if (h
->plt
.offset
!= (bfd_vma
) -1)
4515 Elf_Internal_Rela rela
;
4517 asection
*plt
, *gotplt
, *relplt
;
4518 const struct elf_backend_data
*bed
;
4520 /* When building a static executable, use .iplt, .igot.plt and
4521 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4522 if (htab
->elf
.splt
!= NULL
)
4524 plt
= htab
->elf
.splt
;
4525 gotplt
= htab
->elf
.sgotplt
;
4526 relplt
= htab
->elf
.srelplt
;
4530 plt
= htab
->elf
.iplt
;
4531 gotplt
= htab
->elf
.igotplt
;
4532 relplt
= htab
->elf
.irelplt
;
4535 /* This symbol has an entry in the procedure linkage table. Set
4537 if ((h
->dynindx
== -1
4538 && !((h
->forced_local
|| info
->executable
)
4540 && h
->type
== STT_GNU_IFUNC
))
4546 /* Get the index in the procedure linkage table which
4547 corresponds to this symbol. This is the index of this symbol
4548 in all the symbols for which we are making plt entries. The
4549 first entry in the procedure linkage table is reserved.
4551 Get the offset into the .got table of the entry that
4552 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4553 bytes. The first three are reserved for the dynamic linker.
4555 For static executables, we don't reserve anything. */
4557 if (plt
== htab
->elf
.splt
)
4559 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
4560 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4564 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
4565 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4568 /* Fill in the entry in the procedure linkage table. */
4569 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
4570 abed
->plt_entry_size
);
4572 /* Insert the relocation positions of the plt section. */
4574 /* Put offset the PC-relative instruction referring to the GOT entry,
4575 subtracting the size of that instruction. */
4576 bfd_put_32 (output_bfd
,
4577 (gotplt
->output_section
->vma
4578 + gotplt
->output_offset
4580 - plt
->output_section
->vma
4581 - plt
->output_offset
4583 - abed
->plt_got_insn_size
),
4584 plt
->contents
+ h
->plt
.offset
+ abed
->plt_got_offset
);
4586 /* Fill in the entry in the global offset table, initially this
4587 points to the second part of the PLT entry. */
4588 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4589 + plt
->output_offset
4590 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
4591 gotplt
->contents
+ got_offset
);
4593 /* Fill in the entry in the .rela.plt section. */
4594 rela
.r_offset
= (gotplt
->output_section
->vma
4595 + gotplt
->output_offset
4597 if (h
->dynindx
== -1
4598 || ((info
->executable
4599 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4601 && h
->type
== STT_GNU_IFUNC
))
4603 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4604 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4605 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4606 rela
.r_addend
= (h
->root
.u
.def
.value
4607 + h
->root
.u
.def
.section
->output_section
->vma
4608 + h
->root
.u
.def
.section
->output_offset
);
4609 /* R_X86_64_IRELATIVE comes last. */
4610 plt_index
= htab
->next_irelative_index
--;
4614 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4616 plt_index
= htab
->next_jump_slot_index
++;
4619 /* Don't fill PLT entry for static executables. */
4620 if (plt
== htab
->elf
.splt
)
4622 /* Put relocation index. */
4623 bfd_put_32 (output_bfd
, plt_index
,
4624 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
4625 /* Put offset for jmp .PLT0. */
4626 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ abed
->plt_plt_insn_end
),
4627 plt
->contents
+ h
->plt
.offset
+ abed
->plt_plt_offset
);
4630 bed
= get_elf_backend_data (output_bfd
);
4631 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4632 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4634 if (!h
->def_regular
)
4636 /* Mark the symbol as undefined, rather than as defined in
4637 the .plt section. Leave the value if there were any
4638 relocations where pointer equality matters (this is a clue
4639 for the dynamic linker, to make function pointer
4640 comparisons work between an application and shared
4641 library), otherwise set it to zero. If a function is only
4642 called from a binary, there is no need to slow down
4643 shared libraries because of that. */
4644 sym
->st_shndx
= SHN_UNDEF
;
4645 if (!h
->pointer_equality_needed
)
4650 if (h
->got
.offset
!= (bfd_vma
) -1
4651 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
4652 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
4654 Elf_Internal_Rela rela
;
4656 /* This symbol has an entry in the global offset table. Set it
4658 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4661 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4662 + htab
->elf
.sgot
->output_offset
4663 + (h
->got
.offset
&~ (bfd_vma
) 1));
4665 /* If this is a static link, or it is a -Bsymbolic link and the
4666 symbol is defined locally or was forced to be local because
4667 of a version file, we just want to emit a RELATIVE reloc.
4668 The entry in the global offset table will already have been
4669 initialized in the relocate_section function. */
4671 && h
->type
== STT_GNU_IFUNC
)
4675 /* Generate R_X86_64_GLOB_DAT. */
4682 if (!h
->pointer_equality_needed
)
4685 /* For non-shared object, we can't use .got.plt, which
4686 contains the real function addres if we need pointer
4687 equality. We load the GOT entry with the PLT entry. */
4688 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4689 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4690 + plt
->output_offset
4692 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4696 else if (info
->shared
4697 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4699 if (!h
->def_regular
)
4701 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4702 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4703 rela
.r_addend
= (h
->root
.u
.def
.value
4704 + h
->root
.u
.def
.section
->output_section
->vma
4705 + h
->root
.u
.def
.section
->output_offset
);
4709 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4711 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4712 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4713 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4717 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
4722 Elf_Internal_Rela rela
;
4724 /* This symbol needs a copy reloc. Set it up. */
4726 if (h
->dynindx
== -1
4727 || (h
->root
.type
!= bfd_link_hash_defined
4728 && h
->root
.type
!= bfd_link_hash_defweak
)
4729 || htab
->srelbss
== NULL
)
4732 rela
.r_offset
= (h
->root
.u
.def
.value
4733 + h
->root
.u
.def
.section
->output_section
->vma
4734 + h
->root
.u
.def
.section
->output_offset
);
4735 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4737 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
4743 /* Finish up local dynamic symbol handling. We set the contents of
4744 various dynamic sections here. */
4747 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4749 struct elf_link_hash_entry
*h
4750 = (struct elf_link_hash_entry
*) *slot
;
4751 struct bfd_link_info
*info
4752 = (struct bfd_link_info
*) inf
;
4754 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4758 /* Used to decide how to sort relocs in an optimal manner for the
4759 dynamic linker, before writing them out. */
4761 static enum elf_reloc_type_class
4762 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4763 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4764 const Elf_Internal_Rela
*rela
)
4766 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4768 case R_X86_64_RELATIVE
:
4769 case R_X86_64_RELATIVE64
:
4770 return reloc_class_relative
;
4771 case R_X86_64_JUMP_SLOT
:
4772 return reloc_class_plt
;
4774 return reloc_class_copy
;
4776 return reloc_class_normal
;
4780 /* Finish up the dynamic sections. */
4783 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4784 struct bfd_link_info
*info
)
4786 struct elf_x86_64_link_hash_table
*htab
;
4789 const struct elf_x86_64_backend_data
*const abed
4790 = get_elf_x86_64_backend_data (output_bfd
);
4792 htab
= elf_x86_64_hash_table (info
);
4796 dynobj
= htab
->elf
.dynobj
;
4797 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4799 if (htab
->elf
.dynamic_sections_created
)
4801 bfd_byte
*dyncon
, *dynconend
;
4802 const struct elf_backend_data
*bed
;
4803 bfd_size_type sizeof_dyn
;
4805 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4808 bed
= get_elf_backend_data (dynobj
);
4809 sizeof_dyn
= bed
->s
->sizeof_dyn
;
4810 dyncon
= sdyn
->contents
;
4811 dynconend
= sdyn
->contents
+ sdyn
->size
;
4812 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
4814 Elf_Internal_Dyn dyn
;
4817 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
4825 s
= htab
->elf
.sgotplt
;
4826 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4830 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
4834 s
= htab
->elf
.srelplt
->output_section
;
4835 dyn
.d_un
.d_val
= s
->size
;
4839 /* The procedure linkage table relocs (DT_JMPREL) should
4840 not be included in the overall relocs (DT_RELA).
4841 Therefore, we override the DT_RELASZ entry here to
4842 make it not include the JMPREL relocs. Since the
4843 linker script arranges for .rela.plt to follow all
4844 other relocation sections, we don't have to worry
4845 about changing the DT_RELA entry. */
4846 if (htab
->elf
.srelplt
!= NULL
)
4848 s
= htab
->elf
.srelplt
->output_section
;
4849 dyn
.d_un
.d_val
-= s
->size
;
4853 case DT_TLSDESC_PLT
:
4855 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4856 + htab
->tlsdesc_plt
;
4859 case DT_TLSDESC_GOT
:
4861 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4862 + htab
->tlsdesc_got
;
4866 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
4869 /* Fill in the special first entry in the procedure linkage table. */
4870 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4872 /* Fill in the first entry in the procedure linkage table. */
4873 memcpy (htab
->elf
.splt
->contents
,
4874 abed
->plt0_entry
, abed
->plt_entry_size
);
4875 /* Add offset for pushq GOT+8(%rip), since the instruction
4876 uses 6 bytes subtract this value. */
4877 bfd_put_32 (output_bfd
,
4878 (htab
->elf
.sgotplt
->output_section
->vma
4879 + htab
->elf
.sgotplt
->output_offset
4881 - htab
->elf
.splt
->output_section
->vma
4882 - htab
->elf
.splt
->output_offset
4884 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
4885 /* Add offset for the PC-relative instruction accessing GOT+16,
4886 subtracting the offset to the end of that instruction. */
4887 bfd_put_32 (output_bfd
,
4888 (htab
->elf
.sgotplt
->output_section
->vma
4889 + htab
->elf
.sgotplt
->output_offset
4891 - htab
->elf
.splt
->output_section
->vma
4892 - htab
->elf
.splt
->output_offset
4893 - abed
->plt0_got2_insn_end
),
4894 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
4896 elf_section_data (htab
->elf
.splt
->output_section
)
4897 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
4899 if (htab
->tlsdesc_plt
)
4901 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4902 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
4904 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
4905 abed
->plt0_entry
, abed
->plt_entry_size
);
4907 /* Add offset for pushq GOT+8(%rip), since the
4908 instruction uses 6 bytes subtract this value. */
4909 bfd_put_32 (output_bfd
,
4910 (htab
->elf
.sgotplt
->output_section
->vma
4911 + htab
->elf
.sgotplt
->output_offset
4913 - htab
->elf
.splt
->output_section
->vma
4914 - htab
->elf
.splt
->output_offset
4917 htab
->elf
.splt
->contents
4918 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
4919 /* Add offset for the PC-relative instruction accessing GOT+TDG,
4920 where TGD stands for htab->tlsdesc_got, subtracting the offset
4921 to the end of that instruction. */
4922 bfd_put_32 (output_bfd
,
4923 (htab
->elf
.sgot
->output_section
->vma
4924 + htab
->elf
.sgot
->output_offset
4926 - htab
->elf
.splt
->output_section
->vma
4927 - htab
->elf
.splt
->output_offset
4929 - abed
->plt0_got2_insn_end
),
4930 htab
->elf
.splt
->contents
4931 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
4936 if (htab
->elf
.sgotplt
)
4938 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4940 (*_bfd_error_handler
)
4941 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4945 /* Fill in the first three entries in the global offset table. */
4946 if (htab
->elf
.sgotplt
->size
> 0)
4948 /* Set the first entry in the global offset table to the address of
4949 the dynamic section. */
4951 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
4953 bfd_put_64 (output_bfd
,
4954 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
4955 htab
->elf
.sgotplt
->contents
);
4956 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4957 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
4958 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
4961 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
4965 /* Adjust .eh_frame for .plt section. */
4966 if (htab
->plt_eh_frame
!= NULL
4967 && htab
->plt_eh_frame
->contents
!= NULL
)
4969 if (htab
->elf
.splt
!= NULL
4970 && htab
->elf
.splt
->size
!= 0
4971 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4972 && htab
->elf
.splt
->output_section
!= NULL
4973 && htab
->plt_eh_frame
->output_section
!= NULL
)
4975 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4976 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4977 + htab
->plt_eh_frame
->output_offset
4978 + PLT_FDE_START_OFFSET
;
4979 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4980 htab
->plt_eh_frame
->contents
4981 + PLT_FDE_START_OFFSET
);
4983 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4985 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4987 htab
->plt_eh_frame
->contents
))
4992 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4993 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
4996 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4997 htab_traverse (htab
->loc_hash_table
,
4998 elf_x86_64_finish_local_dynamic_symbol
,
5004 /* Return address for Ith PLT stub in section PLT, for relocation REL
5005 or (bfd_vma) -1 if it should not be included. */
5008 elf_x86_64_plt_sym_val (bfd_vma i
, const asection
*plt
,
5009 const arelent
*rel ATTRIBUTE_UNUSED
)
5011 return plt
->vma
+ (i
+ 1) * GET_PLT_ENTRY_SIZE (plt
->owner
);
5014 /* Handle an x86-64 specific section when reading an object file. This
5015 is called when elfcode.h finds a section with an unknown type. */
5018 elf_x86_64_section_from_shdr (bfd
*abfd
,
5019 Elf_Internal_Shdr
*hdr
,
5023 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
5026 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
5032 /* Hook called by the linker routine which adds symbols from an object
5033 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5037 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5038 struct bfd_link_info
*info
,
5039 Elf_Internal_Sym
*sym
,
5040 const char **namep ATTRIBUTE_UNUSED
,
5041 flagword
*flagsp ATTRIBUTE_UNUSED
,
5047 switch (sym
->st_shndx
)
5049 case SHN_X86_64_LCOMMON
:
5050 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5053 lcomm
= bfd_make_section_with_flags (abfd
,
5057 | SEC_LINKER_CREATED
));
5060 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5063 *valp
= sym
->st_size
;
5067 if ((abfd
->flags
& DYNAMIC
) == 0
5068 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5069 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
5070 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5076 /* Given a BFD section, try to locate the corresponding ELF section
5080 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5081 asection
*sec
, int *index_return
)
5083 if (sec
== &_bfd_elf_large_com_section
)
5085 *index_return
= SHN_X86_64_LCOMMON
;
5091 /* Process a symbol. */
5094 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5097 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5099 switch (elfsym
->internal_elf_sym
.st_shndx
)
5101 case SHN_X86_64_LCOMMON
:
5102 asym
->section
= &_bfd_elf_large_com_section
;
5103 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5104 /* Common symbol doesn't set BSF_GLOBAL. */
5105 asym
->flags
&= ~BSF_GLOBAL
;
5111 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5113 return (sym
->st_shndx
== SHN_COMMON
5114 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5118 elf_x86_64_common_section_index (asection
*sec
)
5120 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5123 return SHN_X86_64_LCOMMON
;
5127 elf_x86_64_common_section (asection
*sec
)
5129 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5130 return bfd_com_section_ptr
;
5132 return &_bfd_elf_large_com_section
;
5136 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5137 const Elf_Internal_Sym
*sym
,
5142 const asection
*oldsec
)
5144 /* A normal common symbol and a large common symbol result in a
5145 normal common symbol. We turn the large common symbol into a
5148 && h
->root
.type
== bfd_link_hash_common
5150 && bfd_is_com_section (*psec
)
5153 if (sym
->st_shndx
== SHN_COMMON
5154 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5156 h
->root
.u
.c
.p
->section
5157 = bfd_make_section_old_way (oldbfd
, "COMMON");
5158 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5160 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5161 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5162 *psec
= bfd_com_section_ptr
;
5169 elf_x86_64_additional_program_headers (bfd
*abfd
,
5170 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5175 /* Check to see if we need a large readonly segment. */
5176 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5177 if (s
&& (s
->flags
& SEC_LOAD
))
5180 /* Check to see if we need a large data segment. Since .lbss sections
5181 is placed right after the .bss section, there should be no need for
5182 a large data segment just because of .lbss. */
5183 s
= bfd_get_section_by_name (abfd
, ".ldata");
5184 if (s
&& (s
->flags
& SEC_LOAD
))
5190 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5193 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5195 if (h
->plt
.offset
!= (bfd_vma
) -1
5197 && !h
->pointer_equality_needed
)
5200 return _bfd_elf_hash_symbol (h
);
5203 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5206 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5207 const bfd_target
*output
)
5209 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5210 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5211 && _bfd_elf_relocs_compatible (input
, output
));
5214 static const struct bfd_elf_special_section
5215 elf_x86_64_special_sections
[]=
5217 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5218 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5219 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5220 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5221 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5222 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5223 { NULL
, 0, 0, 0, 0 }
5226 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
5227 #define TARGET_LITTLE_NAME "elf64-x86-64"
5228 #define ELF_ARCH bfd_arch_i386
5229 #define ELF_TARGET_ID X86_64_ELF_DATA
5230 #define ELF_MACHINE_CODE EM_X86_64
5231 #define ELF_MAXPAGESIZE 0x200000
5232 #define ELF_MINPAGESIZE 0x1000
5233 #define ELF_COMMONPAGESIZE 0x1000
5235 #define elf_backend_can_gc_sections 1
5236 #define elf_backend_can_refcount 1
5237 #define elf_backend_want_got_plt 1
5238 #define elf_backend_plt_readonly 1
5239 #define elf_backend_want_plt_sym 0
5240 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5241 #define elf_backend_rela_normal 1
5242 #define elf_backend_plt_alignment 4
5244 #define elf_info_to_howto elf_x86_64_info_to_howto
5246 #define bfd_elf64_bfd_link_hash_table_create \
5247 elf_x86_64_link_hash_table_create
5248 #define bfd_elf64_bfd_link_hash_table_free \
5249 elf_x86_64_link_hash_table_free
5250 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5251 #define bfd_elf64_bfd_reloc_name_lookup \
5252 elf_x86_64_reloc_name_lookup
5254 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5255 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5256 #define elf_backend_check_relocs elf_x86_64_check_relocs
5257 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5258 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5259 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5260 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5261 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5262 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5263 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5264 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5266 #define elf_backend_write_core_note elf_x86_64_write_core_note
5268 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5269 #define elf_backend_relocate_section elf_x86_64_relocate_section
5270 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5271 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5272 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5273 #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
5274 #define elf_backend_object_p elf64_x86_64_elf_object_p
5275 #define bfd_elf64_mkobject elf_x86_64_mkobject
5277 #define elf_backend_section_from_shdr \
5278 elf_x86_64_section_from_shdr
5280 #define elf_backend_section_from_bfd_section \
5281 elf_x86_64_elf_section_from_bfd_section
5282 #define elf_backend_add_symbol_hook \
5283 elf_x86_64_add_symbol_hook
5284 #define elf_backend_symbol_processing \
5285 elf_x86_64_symbol_processing
5286 #define elf_backend_common_section_index \
5287 elf_x86_64_common_section_index
5288 #define elf_backend_common_section \
5289 elf_x86_64_common_section
5290 #define elf_backend_common_definition \
5291 elf_x86_64_common_definition
5292 #define elf_backend_merge_symbol \
5293 elf_x86_64_merge_symbol
5294 #define elf_backend_special_sections \
5295 elf_x86_64_special_sections
5296 #define elf_backend_additional_program_headers \
5297 elf_x86_64_additional_program_headers
5298 #define elf_backend_hash_symbol \
5299 elf_x86_64_hash_symbol
5301 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5303 #include "elf64-target.h"
5305 /* FreeBSD support. */
5307 #undef TARGET_LITTLE_SYM
5308 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
5309 #undef TARGET_LITTLE_NAME
5310 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5313 #define ELF_OSABI ELFOSABI_FREEBSD
5316 #define elf64_bed elf64_x86_64_fbsd_bed
5318 #include "elf64-target.h"
5320 /* Solaris 2 support. */
5322 #undef TARGET_LITTLE_SYM
5323 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
5324 #undef TARGET_LITTLE_NAME
5325 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5327 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5328 objects won't be recognized. */
5332 #define elf64_bed elf64_x86_64_sol2_bed
5334 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5336 #undef elf_backend_static_tls_alignment
5337 #define elf_backend_static_tls_alignment 16
5339 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5341 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5343 #undef elf_backend_want_plt_sym
5344 #define elf_backend_want_plt_sym 1
5346 #include "elf64-target.h"
5348 /* Native Client support. */
5350 #undef TARGET_LITTLE_SYM
5351 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
5352 #undef TARGET_LITTLE_NAME
5353 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5355 #define elf64_bed elf64_x86_64_nacl_bed
5357 #undef ELF_MAXPAGESIZE
5358 #undef ELF_MINPAGESIZE
5359 #undef ELF_COMMONPAGESIZE
5360 #define ELF_MAXPAGESIZE 0x10000
5361 #define ELF_MINPAGESIZE 0x10000
5362 #define ELF_COMMONPAGESIZE 0x10000
5364 /* Restore defaults. */
5366 #undef elf_backend_static_tls_alignment
5367 #undef elf_backend_want_plt_sym
5368 #define elf_backend_want_plt_sym 0
5370 /* NaCl uses substantially different PLT entries for the same effects. */
5372 #undef elf_backend_plt_alignment
5373 #define elf_backend_plt_alignment 5
5374 #define NACL_PLT_ENTRY_SIZE 64
5375 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5377 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
5379 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5380 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5381 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5382 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5383 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5385 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5386 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */
5388 /* 32 bytes of nop to pad out to the standard size. */
5389 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5390 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5391 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5392 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5393 0x66, /* excess data32 prefix */
5397 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5399 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5400 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5401 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5402 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5404 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5405 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5406 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5408 /* Lazy GOT entries point here (32-byte aligned). */
5409 0x68, /* pushq immediate */
5410 0, 0, 0, 0, /* replaced with index into relocation table. */
5411 0xe9, /* jmp relative */
5412 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5414 /* 22 bytes of nop to pad out to the standard size. */
5415 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5416 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5417 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5420 /* .eh_frame covering the .plt section. */
5422 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
5424 #if (PLT_CIE_LENGTH != 20 \
5425 || PLT_FDE_LENGTH != 36 \
5426 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5427 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5428 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5430 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5431 0, 0, 0, 0, /* CIE ID */
5432 1, /* CIE version */
5433 'z', 'R', 0, /* Augmentation string */
5434 1, /* Code alignment factor */
5435 0x78, /* Data alignment factor */
5436 16, /* Return address column */
5437 1, /* Augmentation size */
5438 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5439 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5440 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5441 DW_CFA_nop
, DW_CFA_nop
,
5443 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5444 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
5445 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5446 0, 0, 0, 0, /* .plt size goes here */
5447 0, /* Augmentation size */
5448 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
5449 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5450 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
5451 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5452 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5453 13, /* Block length */
5454 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
5455 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
5456 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5457 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
5458 DW_CFA_nop
, DW_CFA_nop
5461 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
5463 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
5464 elf_x86_64_nacl_plt_entry
, /* plt_entry */
5465 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5466 2, /* plt0_got1_offset */
5467 9, /* plt0_got2_offset */
5468 13, /* plt0_got2_insn_end */
5469 3, /* plt_got_offset */
5470 33, /* plt_reloc_offset */
5471 38, /* plt_plt_offset */
5472 7, /* plt_got_insn_size */
5473 42, /* plt_plt_insn_end */
5474 32, /* plt_lazy_offset */
5475 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
5476 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
5479 #undef elf_backend_arch_data
5480 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5482 #undef elf_backend_modify_segment_map
5483 #define elf_backend_modify_segment_map nacl_modify_segment_map
5484 #undef elf_backend_modify_program_headers
5485 #define elf_backend_modify_program_headers nacl_modify_program_headers
5486 #undef elf_backend_final_write_processing
5487 #define elf_backend_final_write_processing nacl_final_write_processing
5489 #include "elf64-target.h"
5491 /* Native Client x32 support. */
5493 #undef TARGET_LITTLE_SYM
5494 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
5495 #undef TARGET_LITTLE_NAME
5496 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5498 #define elf32_bed elf32_x86_64_nacl_bed
5500 #define bfd_elf32_bfd_link_hash_table_create \
5501 elf_x86_64_link_hash_table_create
5502 #define bfd_elf32_bfd_link_hash_table_free \
5503 elf_x86_64_link_hash_table_free
5504 #define bfd_elf32_bfd_reloc_type_lookup \
5505 elf_x86_64_reloc_type_lookup
5506 #define bfd_elf32_bfd_reloc_name_lookup \
5507 elf_x86_64_reloc_name_lookup
5508 #define bfd_elf32_mkobject \
5511 #undef elf_backend_object_p
5512 #define elf_backend_object_p \
5513 elf32_x86_64_elf_object_p
5515 #undef elf_backend_bfd_from_remote_memory
5516 #define elf_backend_bfd_from_remote_memory \
5517 _bfd_elf32_bfd_from_remote_memory
5519 #undef elf_backend_size_info
5520 #define elf_backend_size_info \
5521 _bfd_elf32_size_info
5523 #include "elf32-target.h"
5525 /* Restore defaults. */
5526 #undef elf_backend_object_p
5527 #define elf_backend_object_p elf64_x86_64_elf_object_p
5528 #undef elf_backend_bfd_from_remote_memory
5529 #undef elf_backend_size_info
5530 #undef elf_backend_modify_segment_map
5531 #undef elf_backend_modify_program_headers
5532 #undef elf_backend_final_write_processing
5534 /* Intel L1OM support. */
5537 elf64_l1om_elf_object_p (bfd
*abfd
)
5539 /* Set the right machine number for an L1OM elf64 file. */
5540 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5544 #undef TARGET_LITTLE_SYM
5545 #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5546 #undef TARGET_LITTLE_NAME
5547 #define TARGET_LITTLE_NAME "elf64-l1om"
5549 #define ELF_ARCH bfd_arch_l1om
5551 #undef ELF_MACHINE_CODE
5552 #define ELF_MACHINE_CODE EM_L1OM
5557 #define elf64_bed elf64_l1om_bed
5559 #undef elf_backend_object_p
5560 #define elf_backend_object_p elf64_l1om_elf_object_p
5562 /* Restore defaults. */
5563 #undef ELF_MAXPAGESIZE
5564 #undef ELF_MINPAGESIZE
5565 #undef ELF_COMMONPAGESIZE
5566 #define ELF_MAXPAGESIZE 0x200000
5567 #define ELF_MINPAGESIZE 0x1000
5568 #define ELF_COMMONPAGESIZE 0x1000
5569 #undef elf_backend_plt_alignment
5570 #define elf_backend_plt_alignment 4
5571 #undef elf_backend_arch_data
5572 #define elf_backend_arch_data &elf_x86_64_arch_bed
5574 #include "elf64-target.h"
5576 /* FreeBSD L1OM support. */
5578 #undef TARGET_LITTLE_SYM
5579 #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5580 #undef TARGET_LITTLE_NAME
5581 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5584 #define ELF_OSABI ELFOSABI_FREEBSD
5587 #define elf64_bed elf64_l1om_fbsd_bed
5589 #include "elf64-target.h"
5591 /* Intel K1OM support. */
5594 elf64_k1om_elf_object_p (bfd
*abfd
)
5596 /* Set the right machine number for an K1OM elf64 file. */
5597 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5601 #undef TARGET_LITTLE_SYM
5602 #define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
5603 #undef TARGET_LITTLE_NAME
5604 #define TARGET_LITTLE_NAME "elf64-k1om"
5606 #define ELF_ARCH bfd_arch_k1om
5608 #undef ELF_MACHINE_CODE
5609 #define ELF_MACHINE_CODE EM_K1OM
5614 #define elf64_bed elf64_k1om_bed
5616 #undef elf_backend_object_p
5617 #define elf_backend_object_p elf64_k1om_elf_object_p
5619 #undef elf_backend_static_tls_alignment
5621 #undef elf_backend_want_plt_sym
5622 #define elf_backend_want_plt_sym 0
5624 #include "elf64-target.h"
5626 /* FreeBSD K1OM support. */
5628 #undef TARGET_LITTLE_SYM
5629 #define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
5630 #undef TARGET_LITTLE_NAME
5631 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5634 #define ELF_OSABI ELFOSABI_FREEBSD
5637 #define elf64_bed elf64_k1om_fbsd_bed
5639 #include "elf64-target.h"
5641 /* 32bit x86-64 support. */
5643 #undef TARGET_LITTLE_SYM
5644 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5645 #undef TARGET_LITTLE_NAME
5646 #define TARGET_LITTLE_NAME "elf32-x86-64"
5650 #define ELF_ARCH bfd_arch_i386
5652 #undef ELF_MACHINE_CODE
5653 #define ELF_MACHINE_CODE EM_X86_64
5657 #undef elf_backend_object_p
5658 #define elf_backend_object_p \
5659 elf32_x86_64_elf_object_p
5661 #undef elf_backend_bfd_from_remote_memory
5662 #define elf_backend_bfd_from_remote_memory \
5663 _bfd_elf32_bfd_from_remote_memory
5665 #undef elf_backend_size_info
5666 #define elf_backend_size_info \
5667 _bfd_elf32_size_info
5669 #include "elf32-target.h"