1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka <jh@suse.cz>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #include "bfd_stdint.h"
32 #include "libiberty.h"
34 #include "elf/x86-64.h"
41 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
42 #define MINUS_ONE (~ (bfd_vma) 0)
44 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
45 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
46 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
47 since they are the same. */
49 #define ABI_64_P(abfd) \
50 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
52 /* The relocation "howto" table. Order of fields:
53 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
54 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
55 static reloc_howto_type x86_64_elf_howto_table
[] =
57 HOWTO(R_X86_64_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
58 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
60 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
61 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
63 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
64 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
66 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
67 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
69 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
70 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
72 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
73 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
75 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
76 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
78 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
79 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
81 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
84 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
85 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
87 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
88 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
90 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
91 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
93 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
95 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
97 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
99 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
100 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
101 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
104 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
105 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
107 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
110 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
111 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
113 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
114 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
116 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
117 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
119 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
120 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
122 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
123 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
125 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
128 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
130 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
131 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
132 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
133 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
134 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
135 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
137 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
138 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
140 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
141 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
142 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
143 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
144 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
146 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
147 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
149 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
150 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", FALSE
, 0xffffffff, 0xffffffff,
152 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, FALSE
, 0, complain_overflow_unsigned
,
153 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", FALSE
, MINUS_ONE
, MINUS_ONE
,
155 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
156 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
157 "R_X86_64_GOTPC32_TLSDESC",
158 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
159 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
160 complain_overflow_dont
, bfd_elf_generic_reloc
,
161 "R_X86_64_TLSDESC_CALL",
163 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
164 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
166 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
167 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
168 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
170 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
171 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
173 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
174 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", FALSE
, 0xffffffff, 0xffffffff,
176 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
177 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", FALSE
, 0xffffffff, 0xffffffff,
180 /* We have a gap in the reloc numbers here.
181 R_X86_64_standard counts the number up to this point, and
182 R_X86_64_vt_offset is the value to subtract from a reloc type of
183 R_X86_64_GNU_VT* to form an index into this table. */
184 #define R_X86_64_standard (R_X86_64_PLT32_BND + 1)
185 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
187 /* GNU extension to record C++ vtable hierarchy. */
188 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
189 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
191 /* GNU extension to record C++ vtable member usage. */
192 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
193 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
196 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
197 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
198 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
202 #define IS_X86_64_PCREL_TYPE(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
206 || ((TYPE) == R_X86_64_PC32_BND) \
207 || ((TYPE) == R_X86_64_PC64))
209 /* Map BFD relocs to the x86_64 elf relocs. */
212 bfd_reloc_code_real_type bfd_reloc_val
;
213 unsigned char elf_reloc_val
;
216 static const struct elf_reloc_map x86_64_reloc_map
[] =
218 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
219 { BFD_RELOC_64
, R_X86_64_64
, },
220 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
221 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
222 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
223 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
224 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
225 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
226 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
227 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
228 { BFD_RELOC_32
, R_X86_64_32
, },
229 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
230 { BFD_RELOC_16
, R_X86_64_16
, },
231 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
232 { BFD_RELOC_8
, R_X86_64_8
, },
233 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
234 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
235 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
236 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
237 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
238 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
239 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
240 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
241 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
242 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
243 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
244 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
245 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
246 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
247 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
248 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
249 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
250 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
251 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
252 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
253 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
254 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
255 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
256 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
,},
257 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
,},
258 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
259 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
262 static reloc_howto_type
*
263 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
267 if (r_type
== (unsigned int) R_X86_64_32
)
272 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
274 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
275 || r_type
>= (unsigned int) R_X86_64_max
)
277 if (r_type
>= (unsigned int) R_X86_64_standard
)
279 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
281 r_type
= R_X86_64_NONE
;
286 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
287 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
288 return &x86_64_elf_howto_table
[i
];
291 /* Given a BFD reloc type, return a HOWTO structure. */
292 static reloc_howto_type
*
293 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
294 bfd_reloc_code_real_type code
)
298 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
301 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
302 return elf_x86_64_rtype_to_howto (abfd
,
303 x86_64_reloc_map
[i
].elf_reloc_val
);
308 static reloc_howto_type
*
309 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
314 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
316 /* Get x32 R_X86_64_32. */
317 reloc_howto_type
*reloc
318 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
319 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
323 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
324 if (x86_64_elf_howto_table
[i
].name
!= NULL
325 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
326 return &x86_64_elf_howto_table
[i
];
331 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
334 elf_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
335 Elf_Internal_Rela
*dst
)
339 r_type
= ELF32_R_TYPE (dst
->r_info
);
340 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
341 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
344 /* Support for core dump NOTE sections. */
346 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
351 switch (note
->descsz
)
356 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
358 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
361 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
369 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
371 elf_tdata (abfd
)->core
->signal
372 = bfd_get_16 (abfd
, note
->descdata
+ 12);
375 elf_tdata (abfd
)->core
->lwpid
376 = bfd_get_32 (abfd
, note
->descdata
+ 32);
385 /* Make a ".reg/999" section. */
386 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
387 size
, note
->descpos
+ offset
);
391 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
393 switch (note
->descsz
)
398 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
399 elf_tdata (abfd
)->core
->pid
400 = bfd_get_32 (abfd
, note
->descdata
+ 12);
401 elf_tdata (abfd
)->core
->program
402 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
403 elf_tdata (abfd
)->core
->command
404 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
407 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
408 elf_tdata (abfd
)->core
->pid
409 = bfd_get_32 (abfd
, note
->descdata
+ 24);
410 elf_tdata (abfd
)->core
->program
411 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
412 elf_tdata (abfd
)->core
->command
413 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
416 /* Note that for some reason, a spurious space is tacked
417 onto the end of the args in some (at least one anyway)
418 implementations, so strip it off if it exists. */
421 char *command
= elf_tdata (abfd
)->core
->command
;
422 int n
= strlen (command
);
424 if (0 < n
&& command
[n
- 1] == ' ')
425 command
[n
- 1] = '\0';
433 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
436 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
438 const char *fname
, *psargs
;
449 va_start (ap
, note_type
);
450 fname
= va_arg (ap
, const char *);
451 psargs
= va_arg (ap
, const char *);
454 if (bed
->s
->elfclass
== ELFCLASS32
)
457 memset (&data
, 0, sizeof (data
));
458 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
459 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
460 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
461 &data
, sizeof (data
));
466 memset (&data
, 0, sizeof (data
));
467 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
468 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
469 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
470 &data
, sizeof (data
));
475 va_start (ap
, note_type
);
476 pid
= va_arg (ap
, long);
477 cursig
= va_arg (ap
, int);
478 gregs
= va_arg (ap
, const void *);
481 if (bed
->s
->elfclass
== ELFCLASS32
)
483 if (bed
->elf_machine_code
== EM_X86_64
)
485 prstatusx32_t prstat
;
486 memset (&prstat
, 0, sizeof (prstat
));
488 prstat
.pr_cursig
= cursig
;
489 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
490 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
491 &prstat
, sizeof (prstat
));
496 memset (&prstat
, 0, sizeof (prstat
));
498 prstat
.pr_cursig
= cursig
;
499 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
500 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
501 &prstat
, sizeof (prstat
));
507 memset (&prstat
, 0, sizeof (prstat
));
509 prstat
.pr_cursig
= cursig
;
510 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
511 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
512 &prstat
, sizeof (prstat
));
519 /* Functions for the x86-64 ELF linker. */
521 /* The name of the dynamic interpreter. This is put in the .interp
524 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
525 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
527 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
531 #define ELIMINATE_COPY_RELOCS 1
533 /* The size in bytes of an entry in the global offset table. */
535 #define GOT_ENTRY_SIZE 8
537 /* The size in bytes of an entry in the procedure linkage table. */
539 #define PLT_ENTRY_SIZE 16
541 /* The first entry in a procedure linkage table looks like this. See the
542 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
544 static const bfd_byte elf_x86_64_plt0_entry
[PLT_ENTRY_SIZE
] =
546 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
547 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
548 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
551 /* Subsequent entries in a procedure linkage table look like this. */
553 static const bfd_byte elf_x86_64_plt_entry
[PLT_ENTRY_SIZE
] =
555 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
556 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
557 0x68, /* pushq immediate */
558 0, 0, 0, 0, /* replaced with index into relocation table. */
559 0xe9, /* jmp relative */
560 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
563 /* The first entry in a procedure linkage table with BND relocations
566 static const bfd_byte elf_x86_64_bnd_plt0_entry
[PLT_ENTRY_SIZE
] =
568 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
569 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
570 0x0f, 0x1f, 0 /* nopl (%rax) */
573 /* Subsequent entries for legacy branches in a procedure linkage table
574 with BND relocations look like this. */
576 static const bfd_byte elf_x86_64_legacy_plt_entry
[PLT_ENTRY_SIZE
] =
578 0x68, 0, 0, 0, 0, /* pushq immediate */
579 0xe9, 0, 0, 0, 0, /* jmpq relative */
580 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
583 /* Subsequent entries for branches with BND prefx in a procedure linkage
584 table with BND relocations look like this. */
586 static const bfd_byte elf_x86_64_bnd_plt_entry
[PLT_ENTRY_SIZE
] =
588 0x68, 0, 0, 0, 0, /* pushq immediate */
589 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
590 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
593 /* Entries for legacy branches in the second procedure linkage table
596 static const bfd_byte elf_x86_64_legacy_plt2_entry
[8] =
598 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
599 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries for branches with BND prefix in the second procedure linkage
604 table look like this. */
606 static const bfd_byte elf_x86_64_bnd_plt2_entry
[8] =
608 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
609 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
613 /* .eh_frame covering the .plt section. */
615 static const bfd_byte elf_x86_64_eh_frame_plt
[] =
617 #define PLT_CIE_LENGTH 20
618 #define PLT_FDE_LENGTH 36
619 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
620 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
621 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
622 0, 0, 0, 0, /* CIE ID */
624 'z', 'R', 0, /* Augmentation string */
625 1, /* Code alignment factor */
626 0x78, /* Data alignment factor */
627 16, /* Return address column */
628 1, /* Augmentation size */
629 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
630 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
631 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
632 DW_CFA_nop
, DW_CFA_nop
,
634 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
635 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
636 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
637 0, 0, 0, 0, /* .plt size goes here */
638 0, /* Augmentation size */
639 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
640 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
641 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
642 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
643 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
644 11, /* Block length */
645 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
646 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
647 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
648 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
649 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
652 /* Architecture-specific backend data for x86-64. */
654 struct elf_x86_64_backend_data
656 /* Templates for the initial PLT entry and for subsequent entries. */
657 const bfd_byte
*plt0_entry
;
658 const bfd_byte
*plt_entry
;
659 unsigned int plt_entry_size
; /* Size of each PLT entry. */
661 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
662 unsigned int plt0_got1_offset
;
663 unsigned int plt0_got2_offset
;
665 /* Offset of the end of the PC-relative instruction containing
667 unsigned int plt0_got2_insn_end
;
669 /* Offsets into plt_entry that are to be replaced with... */
670 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
671 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
672 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
674 /* Length of the PC-relative instruction containing plt_got_offset. */
675 unsigned int plt_got_insn_size
;
677 /* Offset of the end of the PC-relative jump to plt0_entry. */
678 unsigned int plt_plt_insn_end
;
680 /* Offset into plt_entry where the initial value of the GOT entry points. */
681 unsigned int plt_lazy_offset
;
683 /* .eh_frame covering the .plt section. */
684 const bfd_byte
*eh_frame_plt
;
685 unsigned int eh_frame_plt_size
;
688 #define get_elf_x86_64_arch_data(bed) \
689 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
691 #define get_elf_x86_64_backend_data(abfd) \
692 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
694 #define GET_PLT_ENTRY_SIZE(abfd) \
695 get_elf_x86_64_backend_data (abfd)->plt_entry_size
697 /* These are the standard parameters. */
698 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
700 elf_x86_64_plt0_entry
, /* plt0_entry */
701 elf_x86_64_plt_entry
, /* plt_entry */
702 sizeof (elf_x86_64_plt_entry
), /* plt_entry_size */
703 2, /* plt0_got1_offset */
704 8, /* plt0_got2_offset */
705 12, /* plt0_got2_insn_end */
706 2, /* plt_got_offset */
707 7, /* plt_reloc_offset */
708 12, /* plt_plt_offset */
709 6, /* plt_got_insn_size */
710 PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
711 6, /* plt_lazy_offset */
712 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
713 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
716 static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed
=
718 elf_x86_64_bnd_plt0_entry
, /* plt0_entry */
719 elf_x86_64_bnd_plt_entry
, /* plt_entry */
720 sizeof (elf_x86_64_bnd_plt_entry
), /* plt_entry_size */
721 2, /* plt0_got1_offset */
722 1+8, /* plt0_got2_offset */
723 1+12, /* plt0_got2_insn_end */
724 1+2, /* plt_got_offset */
725 1, /* plt_reloc_offset */
726 7, /* plt_plt_offset */
727 1+6, /* plt_got_insn_size */
728 11, /* plt_plt_insn_end */
729 0, /* plt_lazy_offset */
730 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
731 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
734 #define elf_backend_arch_data &elf_x86_64_arch_bed
736 /* x86-64 ELF linker hash entry. */
738 struct elf_x86_64_link_hash_entry
740 struct elf_link_hash_entry elf
;
742 /* Track dynamic relocs copied for this symbol. */
743 struct elf_dyn_relocs
*dyn_relocs
;
745 #define GOT_UNKNOWN 0
749 #define GOT_TLS_GDESC 4
750 #define GOT_TLS_GD_BOTH_P(type) \
751 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
752 #define GOT_TLS_GD_P(type) \
753 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
754 #define GOT_TLS_GDESC_P(type) \
755 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
756 #define GOT_TLS_GD_ANY_P(type) \
757 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
758 unsigned char tls_type
;
760 /* TRUE if a weak symbol with a real definition needs a copy reloc.
761 When there is a weak symbol with a real definition, the processor
762 independent code will have arranged for us to see the real
763 definition first. We need to copy the needs_copy bit from the
764 real definition and check it when allowing copy reloc in PIE. */
765 unsigned int needs_copy
: 1;
767 /* TRUE if symbol has at least one BND relocation. */
768 unsigned int has_bnd_reloc
: 1;
770 /* Information about the GOT PLT entry. Filled when there are both
771 GOT and PLT relocations against the same function. */
772 union gotplt_union plt_got
;
774 /* Information about the second PLT entry. Filled when has_bnd_reloc is
776 union gotplt_union plt_bnd
;
778 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
779 starting at the end of the jump table. */
783 #define elf_x86_64_hash_entry(ent) \
784 ((struct elf_x86_64_link_hash_entry *)(ent))
786 struct elf_x86_64_obj_tdata
788 struct elf_obj_tdata root
;
790 /* tls_type for each local got entry. */
791 char *local_got_tls_type
;
793 /* GOTPLT entries for TLS descriptors. */
794 bfd_vma
*local_tlsdesc_gotent
;
797 #define elf_x86_64_tdata(abfd) \
798 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
800 #define elf_x86_64_local_got_tls_type(abfd) \
801 (elf_x86_64_tdata (abfd)->local_got_tls_type)
803 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
804 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
806 #define is_x86_64_elf(bfd) \
807 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
808 && elf_tdata (bfd) != NULL \
809 && elf_object_id (bfd) == X86_64_ELF_DATA)
812 elf_x86_64_mkobject (bfd
*abfd
)
814 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_x86_64_obj_tdata
),
818 /* x86-64 ELF linker hash table. */
820 struct elf_x86_64_link_hash_table
822 struct elf_link_hash_table elf
;
824 /* Short-cuts to get to dynamic linker sections. */
827 asection
*plt_eh_frame
;
833 bfd_signed_vma refcount
;
837 /* The amount of space used by the jump slots in the GOT. */
838 bfd_vma sgotplt_jump_table_size
;
840 /* Small local sym cache. */
841 struct sym_cache sym_cache
;
843 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
844 bfd_vma (*r_sym
) (bfd_vma
);
845 unsigned int pointer_r_type
;
846 const char *dynamic_interpreter
;
847 int dynamic_interpreter_size
;
849 /* _TLS_MODULE_BASE_ symbol. */
850 struct bfd_link_hash_entry
*tls_module_base
;
852 /* Used by local STT_GNU_IFUNC symbols. */
853 htab_t loc_hash_table
;
854 void * loc_hash_memory
;
856 /* The offset into splt of the PLT entry for the TLS descriptor
857 resolver. Special values are 0, if not necessary (or not found
858 to be necessary yet), and -1 if needed but not determined
861 /* The offset into sgot of the GOT entry used by the PLT entry
865 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
866 bfd_vma next_jump_slot_index
;
867 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
868 bfd_vma next_irelative_index
;
871 /* Get the x86-64 ELF linker hash table from a link_info structure. */
873 #define elf_x86_64_hash_table(p) \
874 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
875 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
877 #define elf_x86_64_compute_jump_table_size(htab) \
878 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
880 /* Create an entry in an x86-64 ELF linker hash table. */
882 static struct bfd_hash_entry
*
883 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
884 struct bfd_hash_table
*table
,
887 /* Allocate the structure if it has not already been allocated by a
891 entry
= (struct bfd_hash_entry
*)
892 bfd_hash_allocate (table
,
893 sizeof (struct elf_x86_64_link_hash_entry
));
898 /* Call the allocation method of the superclass. */
899 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
902 struct elf_x86_64_link_hash_entry
*eh
;
904 eh
= (struct elf_x86_64_link_hash_entry
*) entry
;
905 eh
->dyn_relocs
= NULL
;
906 eh
->tls_type
= GOT_UNKNOWN
;
908 eh
->has_bnd_reloc
= 0;
909 eh
->plt_bnd
.offset
= (bfd_vma
) -1;
910 eh
->plt_got
.offset
= (bfd_vma
) -1;
911 eh
->tlsdesc_got
= (bfd_vma
) -1;
917 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
918 for local symbol so that we can handle local STT_GNU_IFUNC symbols
919 as global symbol. We reuse indx and dynstr_index for local symbol
920 hash since they aren't used by global symbols in this backend. */
923 elf_x86_64_local_htab_hash (const void *ptr
)
925 struct elf_link_hash_entry
*h
926 = (struct elf_link_hash_entry
*) ptr
;
927 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
930 /* Compare local hash entries. */
933 elf_x86_64_local_htab_eq (const void *ptr1
, const void *ptr2
)
935 struct elf_link_hash_entry
*h1
936 = (struct elf_link_hash_entry
*) ptr1
;
937 struct elf_link_hash_entry
*h2
938 = (struct elf_link_hash_entry
*) ptr2
;
940 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
943 /* Find and/or create a hash entry for local symbol. */
945 static struct elf_link_hash_entry
*
946 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table
*htab
,
947 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
950 struct elf_x86_64_link_hash_entry e
, *ret
;
951 asection
*sec
= abfd
->sections
;
952 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
953 htab
->r_sym (rel
->r_info
));
956 e
.elf
.indx
= sec
->id
;
957 e
.elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
958 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
959 create
? INSERT
: NO_INSERT
);
966 ret
= (struct elf_x86_64_link_hash_entry
*) *slot
;
970 ret
= (struct elf_x86_64_link_hash_entry
*)
971 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
972 sizeof (struct elf_x86_64_link_hash_entry
));
975 memset (ret
, 0, sizeof (*ret
));
976 ret
->elf
.indx
= sec
->id
;
977 ret
->elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
978 ret
->elf
.dynindx
= -1;
979 ret
->plt_got
.offset
= (bfd_vma
) -1;
985 /* Destroy an X86-64 ELF linker hash table. */
988 elf_x86_64_link_hash_table_free (bfd
*obfd
)
990 struct elf_x86_64_link_hash_table
*htab
991 = (struct elf_x86_64_link_hash_table
*) obfd
->link
.hash
;
993 if (htab
->loc_hash_table
)
994 htab_delete (htab
->loc_hash_table
);
995 if (htab
->loc_hash_memory
)
996 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
997 _bfd_elf_link_hash_table_free (obfd
);
1000 /* Create an X86-64 ELF linker hash table. */
1002 static struct bfd_link_hash_table
*
1003 elf_x86_64_link_hash_table_create (bfd
*abfd
)
1005 struct elf_x86_64_link_hash_table
*ret
;
1006 bfd_size_type amt
= sizeof (struct elf_x86_64_link_hash_table
);
1008 ret
= (struct elf_x86_64_link_hash_table
*) bfd_zmalloc (amt
);
1012 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1013 elf_x86_64_link_hash_newfunc
,
1014 sizeof (struct elf_x86_64_link_hash_entry
),
1021 if (ABI_64_P (abfd
))
1023 ret
->r_info
= elf64_r_info
;
1024 ret
->r_sym
= elf64_r_sym
;
1025 ret
->pointer_r_type
= R_X86_64_64
;
1026 ret
->dynamic_interpreter
= ELF64_DYNAMIC_INTERPRETER
;
1027 ret
->dynamic_interpreter_size
= sizeof ELF64_DYNAMIC_INTERPRETER
;
1031 ret
->r_info
= elf32_r_info
;
1032 ret
->r_sym
= elf32_r_sym
;
1033 ret
->pointer_r_type
= R_X86_64_32
;
1034 ret
->dynamic_interpreter
= ELF32_DYNAMIC_INTERPRETER
;
1035 ret
->dynamic_interpreter_size
= sizeof ELF32_DYNAMIC_INTERPRETER
;
1038 ret
->loc_hash_table
= htab_try_create (1024,
1039 elf_x86_64_local_htab_hash
,
1040 elf_x86_64_local_htab_eq
,
1042 ret
->loc_hash_memory
= objalloc_create ();
1043 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1045 elf_x86_64_link_hash_table_free (abfd
);
1048 ret
->elf
.root
.hash_table_free
= elf_x86_64_link_hash_table_free
;
1050 return &ret
->elf
.root
;
1053 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1054 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1058 elf_x86_64_create_dynamic_sections (bfd
*dynobj
,
1059 struct bfd_link_info
*info
)
1061 struct elf_x86_64_link_hash_table
*htab
;
1063 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1066 htab
= elf_x86_64_hash_table (info
);
1070 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1074 if (info
->executable
)
1076 /* Always allow copy relocs for building executables. */
1077 asection
*s
= bfd_get_linker_section (dynobj
, ".rela.bss");
1080 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
1081 s
= bfd_make_section_anyway_with_flags (dynobj
,
1083 (bed
->dynamic_sec_flags
1086 || ! bfd_set_section_alignment (dynobj
, s
,
1087 bed
->s
->log_file_align
))
1093 if (!info
->no_ld_generated_unwind_info
1094 && htab
->plt_eh_frame
== NULL
1095 && htab
->elf
.splt
!= NULL
)
1097 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1098 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1099 | SEC_LINKER_CREATED
);
1101 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1102 if (htab
->plt_eh_frame
== NULL
1103 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 3))
1109 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1112 elf_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
1113 struct elf_link_hash_entry
*dir
,
1114 struct elf_link_hash_entry
*ind
)
1116 struct elf_x86_64_link_hash_entry
*edir
, *eind
;
1118 edir
= (struct elf_x86_64_link_hash_entry
*) dir
;
1119 eind
= (struct elf_x86_64_link_hash_entry
*) ind
;
1121 if (!edir
->has_bnd_reloc
)
1122 edir
->has_bnd_reloc
= eind
->has_bnd_reloc
;
1124 if (eind
->dyn_relocs
!= NULL
)
1126 if (edir
->dyn_relocs
!= NULL
)
1128 struct elf_dyn_relocs
**pp
;
1129 struct elf_dyn_relocs
*p
;
1131 /* Add reloc counts against the indirect sym to the direct sym
1132 list. Merge any entries against the same section. */
1133 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1135 struct elf_dyn_relocs
*q
;
1137 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1138 if (q
->sec
== p
->sec
)
1140 q
->pc_count
+= p
->pc_count
;
1141 q
->count
+= p
->count
;
1148 *pp
= edir
->dyn_relocs
;
1151 edir
->dyn_relocs
= eind
->dyn_relocs
;
1152 eind
->dyn_relocs
= NULL
;
1155 if (ind
->root
.type
== bfd_link_hash_indirect
1156 && dir
->got
.refcount
<= 0)
1158 edir
->tls_type
= eind
->tls_type
;
1159 eind
->tls_type
= GOT_UNKNOWN
;
1162 if (ELIMINATE_COPY_RELOCS
1163 && ind
->root
.type
!= bfd_link_hash_indirect
1164 && dir
->dynamic_adjusted
)
1166 /* If called to transfer flags for a weakdef during processing
1167 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1168 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1169 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1170 dir
->ref_regular
|= ind
->ref_regular
;
1171 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1172 dir
->needs_plt
|= ind
->needs_plt
;
1173 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1176 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1180 elf64_x86_64_elf_object_p (bfd
*abfd
)
1182 /* Set the right machine number for an x86-64 elf64 file. */
1183 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1188 elf32_x86_64_elf_object_p (bfd
*abfd
)
1190 /* Set the right machine number for an x86-64 elf32 file. */
1191 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1195 /* Return TRUE if the TLS access code sequence support transition
1199 elf_x86_64_check_tls_transition (bfd
*abfd
,
1200 struct bfd_link_info
*info
,
1203 Elf_Internal_Shdr
*symtab_hdr
,
1204 struct elf_link_hash_entry
**sym_hashes
,
1205 unsigned int r_type
,
1206 const Elf_Internal_Rela
*rel
,
1207 const Elf_Internal_Rela
*relend
)
1210 unsigned long r_symndx
;
1211 bfd_boolean largepic
= FALSE
;
1212 struct elf_link_hash_entry
*h
;
1214 struct elf_x86_64_link_hash_table
*htab
;
1216 /* Get the section contents. */
1217 if (contents
== NULL
)
1219 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1220 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1223 /* FIXME: How to better handle error condition? */
1224 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1227 /* Cache the section contents for elf_link_input_bfd. */
1228 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1232 htab
= elf_x86_64_hash_table (info
);
1233 offset
= rel
->r_offset
;
1236 case R_X86_64_TLSGD
:
1237 case R_X86_64_TLSLD
:
1238 if ((rel
+ 1) >= relend
)
1241 if (r_type
== R_X86_64_TLSGD
)
1243 /* Check transition from GD access model. For 64bit, only
1244 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1245 .word 0x6666; rex64; call __tls_get_addr
1246 can transit to different access model. For 32bit, only
1247 leaq foo@tlsgd(%rip), %rdi
1248 .word 0x6666; rex64; call __tls_get_addr
1249 can transit to different access model. For largepic
1251 leaq foo@tlsgd(%rip), %rdi
1252 movabsq $__tls_get_addr@pltoff, %rax
1256 static const unsigned char call
[] = { 0x66, 0x66, 0x48, 0xe8 };
1257 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1259 if ((offset
+ 12) > sec
->size
)
1262 if (memcmp (contents
+ offset
+ 4, call
, 4) != 0)
1264 if (!ABI_64_P (abfd
)
1265 || (offset
+ 19) > sec
->size
1267 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0
1268 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1269 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1274 else if (ABI_64_P (abfd
))
1277 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1283 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1289 /* Check transition from LD access model. Only
1290 leaq foo@tlsld(%rip), %rdi;
1292 can transit to different access model. For largepic
1294 leaq foo@tlsld(%rip), %rdi
1295 movabsq $__tls_get_addr@pltoff, %rax
1299 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1301 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1304 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1307 if (0xe8 != *(contents
+ offset
+ 4))
1309 if (!ABI_64_P (abfd
)
1310 || (offset
+ 19) > sec
->size
1311 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1312 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1319 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1320 if (r_symndx
< symtab_hdr
->sh_info
)
1323 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1324 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1325 may be versioned. */
1327 && h
->root
.root
.string
!= NULL
1329 ? ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLTOFF64
1330 : (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1331 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
))
1332 && (strncmp (h
->root
.root
.string
,
1333 "__tls_get_addr", 14) == 0));
1335 case R_X86_64_GOTTPOFF
:
1336 /* Check transition from IE access model:
1337 mov foo@gottpoff(%rip), %reg
1338 add foo@gottpoff(%rip), %reg
1341 /* Check REX prefix first. */
1342 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1344 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1345 if (val
!= 0x48 && val
!= 0x4c)
1347 /* X32 may have 0x44 REX prefix or no REX prefix. */
1348 if (ABI_64_P (abfd
))
1354 /* X32 may not have any REX prefix. */
1355 if (ABI_64_P (abfd
))
1357 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1361 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1362 if (val
!= 0x8b && val
!= 0x03)
1365 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1366 return (val
& 0xc7) == 5;
1368 case R_X86_64_GOTPC32_TLSDESC
:
1369 /* Check transition from GDesc access model:
1370 leaq x@tlsdesc(%rip), %rax
1372 Make sure it's a leaq adding rip to a 32-bit offset
1373 into any register, although it's probably almost always
1376 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1379 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1380 if ((val
& 0xfb) != 0x48)
1383 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1386 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1387 return (val
& 0xc7) == 0x05;
1389 case R_X86_64_TLSDESC_CALL
:
1390 /* Check transition from GDesc access model:
1391 call *x@tlsdesc(%rax)
1393 if (offset
+ 2 <= sec
->size
)
1395 /* Make sure that it's a call *x@tlsdesc(%rax). */
1396 static const unsigned char call
[] = { 0xff, 0x10 };
1397 return memcmp (contents
+ offset
, call
, 2) == 0;
1407 /* Return TRUE if the TLS access transition is OK or no transition
1408 will be performed. Update R_TYPE if there is a transition. */
1411 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1412 asection
*sec
, bfd_byte
*contents
,
1413 Elf_Internal_Shdr
*symtab_hdr
,
1414 struct elf_link_hash_entry
**sym_hashes
,
1415 unsigned int *r_type
, int tls_type
,
1416 const Elf_Internal_Rela
*rel
,
1417 const Elf_Internal_Rela
*relend
,
1418 struct elf_link_hash_entry
*h
,
1419 unsigned long r_symndx
)
1421 unsigned int from_type
= *r_type
;
1422 unsigned int to_type
= from_type
;
1423 bfd_boolean check
= TRUE
;
1425 /* Skip TLS transition for functions. */
1427 && (h
->type
== STT_FUNC
1428 || h
->type
== STT_GNU_IFUNC
))
1433 case R_X86_64_TLSGD
:
1434 case R_X86_64_GOTPC32_TLSDESC
:
1435 case R_X86_64_TLSDESC_CALL
:
1436 case R_X86_64_GOTTPOFF
:
1437 if (info
->executable
)
1440 to_type
= R_X86_64_TPOFF32
;
1442 to_type
= R_X86_64_GOTTPOFF
;
1445 /* When we are called from elf_x86_64_relocate_section,
1446 CONTENTS isn't NULL and there may be additional transitions
1447 based on TLS_TYPE. */
1448 if (contents
!= NULL
)
1450 unsigned int new_to_type
= to_type
;
1452 if (info
->executable
1455 && tls_type
== GOT_TLS_IE
)
1456 new_to_type
= R_X86_64_TPOFF32
;
1458 if (to_type
== R_X86_64_TLSGD
1459 || to_type
== R_X86_64_GOTPC32_TLSDESC
1460 || to_type
== R_X86_64_TLSDESC_CALL
)
1462 if (tls_type
== GOT_TLS_IE
)
1463 new_to_type
= R_X86_64_GOTTPOFF
;
1466 /* We checked the transition before when we were called from
1467 elf_x86_64_check_relocs. We only want to check the new
1468 transition which hasn't been checked before. */
1469 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1470 to_type
= new_to_type
;
1475 case R_X86_64_TLSLD
:
1476 if (info
->executable
)
1477 to_type
= R_X86_64_TPOFF32
;
1484 /* Return TRUE if there is no transition. */
1485 if (from_type
== to_type
)
1488 /* Check if the transition can be performed. */
1490 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1491 symtab_hdr
, sym_hashes
,
1492 from_type
, rel
, relend
))
1494 reloc_howto_type
*from
, *to
;
1497 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1498 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1501 name
= h
->root
.root
.string
;
1504 struct elf_x86_64_link_hash_table
*htab
;
1506 htab
= elf_x86_64_hash_table (info
);
1511 Elf_Internal_Sym
*isym
;
1513 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1515 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1519 (*_bfd_error_handler
)
1520 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1521 "in section `%A' failed"),
1522 abfd
, sec
, from
->name
, to
->name
, name
,
1523 (unsigned long) rel
->r_offset
);
1524 bfd_set_error (bfd_error_bad_value
);
1532 /* Rename some of the generic section flags to better document how they
1534 #define need_convert_mov_to_lea sec_flg0
1536 /* Look through the relocs for a section during the first phase, and
1537 calculate needed space in the global offset table, procedure
1538 linkage table, and dynamic reloc sections. */
1541 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1543 const Elf_Internal_Rela
*relocs
)
1545 struct elf_x86_64_link_hash_table
*htab
;
1546 Elf_Internal_Shdr
*symtab_hdr
;
1547 struct elf_link_hash_entry
**sym_hashes
;
1548 const Elf_Internal_Rela
*rel
;
1549 const Elf_Internal_Rela
*rel_end
;
1551 bfd_boolean use_plt_got
;
1553 if (info
->relocatable
)
1556 BFD_ASSERT (is_x86_64_elf (abfd
));
1558 htab
= elf_x86_64_hash_table (info
);
1562 use_plt_got
= get_elf_x86_64_backend_data (abfd
) == &elf_x86_64_arch_bed
;
1564 symtab_hdr
= &elf_symtab_hdr (abfd
);
1565 sym_hashes
= elf_sym_hashes (abfd
);
1569 rel_end
= relocs
+ sec
->reloc_count
;
1570 for (rel
= relocs
; rel
< rel_end
; rel
++)
1572 unsigned int r_type
;
1573 unsigned long r_symndx
;
1574 struct elf_link_hash_entry
*h
;
1575 Elf_Internal_Sym
*isym
;
1577 bfd_boolean size_reloc
;
1579 r_symndx
= htab
->r_sym (rel
->r_info
);
1580 r_type
= ELF32_R_TYPE (rel
->r_info
);
1582 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1584 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1589 if (r_symndx
< symtab_hdr
->sh_info
)
1591 /* A local symbol. */
1592 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1597 /* Check relocation against local STT_GNU_IFUNC symbol. */
1598 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1600 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
,
1605 /* Fake a STT_GNU_IFUNC symbol. */
1606 h
->type
= STT_GNU_IFUNC
;
1609 h
->forced_local
= 1;
1610 h
->root
.type
= bfd_link_hash_defined
;
1618 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1619 while (h
->root
.type
== bfd_link_hash_indirect
1620 || h
->root
.type
== bfd_link_hash_warning
)
1621 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1624 /* Check invalid x32 relocations. */
1625 if (!ABI_64_P (abfd
))
1631 case R_X86_64_DTPOFF64
:
1632 case R_X86_64_TPOFF64
:
1634 case R_X86_64_GOTOFF64
:
1635 case R_X86_64_GOT64
:
1636 case R_X86_64_GOTPCREL64
:
1637 case R_X86_64_GOTPC64
:
1638 case R_X86_64_GOTPLT64
:
1639 case R_X86_64_PLTOFF64
:
1642 name
= h
->root
.root
.string
;
1644 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1646 (*_bfd_error_handler
)
1647 (_("%B: relocation %s against symbol `%s' isn't "
1648 "supported in x32 mode"), abfd
,
1649 x86_64_elf_howto_table
[r_type
].name
, name
);
1650 bfd_set_error (bfd_error_bad_value
);
1658 /* Create the ifunc sections for static executables. If we
1659 never see an indirect function symbol nor we are building
1660 a static executable, those sections will be empty and
1661 won't appear in output. */
1667 case R_X86_64_PC32_BND
:
1668 case R_X86_64_PLT32_BND
:
1670 case R_X86_64_PLT32
:
1673 /* MPX PLT is supported only if elf_x86_64_arch_bed
1674 is used in 64-bit mode. */
1677 && (get_elf_x86_64_backend_data (abfd
)
1678 == &elf_x86_64_arch_bed
))
1680 elf_x86_64_hash_entry (h
)->has_bnd_reloc
= 1;
1682 /* Create the second PLT for Intel MPX support. */
1683 if (htab
->plt_bnd
== NULL
)
1685 unsigned int plt_bnd_align
;
1686 const struct elf_backend_data
*bed
;
1688 bed
= get_elf_backend_data (info
->output_bfd
);
1689 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry
) == 8
1690 && (sizeof (elf_x86_64_bnd_plt2_entry
)
1691 == sizeof (elf_x86_64_legacy_plt2_entry
)));
1694 if (htab
->elf
.dynobj
== NULL
)
1695 htab
->elf
.dynobj
= abfd
;
1697 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1699 (bed
->dynamic_sec_flags
1704 if (htab
->plt_bnd
== NULL
1705 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1714 case R_X86_64_GOTPCREL
:
1715 case R_X86_64_GOTPCREL64
:
1716 if (htab
->elf
.dynobj
== NULL
)
1717 htab
->elf
.dynobj
= abfd
;
1718 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1723 /* It is referenced by a non-shared object. */
1725 h
->root
.non_ir_ref
= 1;
1728 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1729 symtab_hdr
, sym_hashes
,
1730 &r_type
, GOT_UNKNOWN
,
1731 rel
, rel_end
, h
, r_symndx
))
1736 case R_X86_64_TLSLD
:
1737 htab
->tls_ld_got
.refcount
+= 1;
1740 case R_X86_64_TPOFF32
:
1741 if (!info
->executable
&& ABI_64_P (abfd
))
1744 name
= h
->root
.root
.string
;
1746 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1748 (*_bfd_error_handler
)
1749 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1751 x86_64_elf_howto_table
[r_type
].name
, name
);
1752 bfd_set_error (bfd_error_bad_value
);
1757 case R_X86_64_GOTTPOFF
:
1758 if (!info
->executable
)
1759 info
->flags
|= DF_STATIC_TLS
;
1762 case R_X86_64_GOT32
:
1763 case R_X86_64_GOTPCREL
:
1764 case R_X86_64_TLSGD
:
1765 case R_X86_64_GOT64
:
1766 case R_X86_64_GOTPCREL64
:
1767 case R_X86_64_GOTPLT64
:
1768 case R_X86_64_GOTPC32_TLSDESC
:
1769 case R_X86_64_TLSDESC_CALL
:
1770 /* This symbol requires a global offset table entry. */
1772 int tls_type
, old_tls_type
;
1776 default: tls_type
= GOT_NORMAL
; break;
1777 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1778 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1779 case R_X86_64_GOTPC32_TLSDESC
:
1780 case R_X86_64_TLSDESC_CALL
:
1781 tls_type
= GOT_TLS_GDESC
; break;
1786 h
->got
.refcount
+= 1;
1787 old_tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
1791 bfd_signed_vma
*local_got_refcounts
;
1793 /* This is a global offset table entry for a local symbol. */
1794 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1795 if (local_got_refcounts
== NULL
)
1799 size
= symtab_hdr
->sh_info
;
1800 size
*= sizeof (bfd_signed_vma
)
1801 + sizeof (bfd_vma
) + sizeof (char);
1802 local_got_refcounts
= ((bfd_signed_vma
*)
1803 bfd_zalloc (abfd
, size
));
1804 if (local_got_refcounts
== NULL
)
1806 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1807 elf_x86_64_local_tlsdesc_gotent (abfd
)
1808 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1809 elf_x86_64_local_got_tls_type (abfd
)
1810 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1812 local_got_refcounts
[r_symndx
] += 1;
1814 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1817 /* If a TLS symbol is accessed using IE at least once,
1818 there is no point to use dynamic model for it. */
1819 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1820 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1821 || tls_type
!= GOT_TLS_IE
))
1823 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1824 tls_type
= old_tls_type
;
1825 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1826 && GOT_TLS_GD_ANY_P (tls_type
))
1827 tls_type
|= old_tls_type
;
1831 name
= h
->root
.root
.string
;
1833 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1835 (*_bfd_error_handler
)
1836 (_("%B: '%s' accessed both as normal and thread local symbol"),
1838 bfd_set_error (bfd_error_bad_value
);
1843 if (old_tls_type
!= tls_type
)
1846 elf_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1848 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1853 case R_X86_64_GOTOFF64
:
1854 case R_X86_64_GOTPC32
:
1855 case R_X86_64_GOTPC64
:
1857 if (htab
->elf
.sgot
== NULL
)
1859 if (htab
->elf
.dynobj
== NULL
)
1860 htab
->elf
.dynobj
= abfd
;
1861 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1867 case R_X86_64_PLT32
:
1868 case R_X86_64_PLT32_BND
:
1869 /* This symbol requires a procedure linkage table entry. We
1870 actually build the entry in adjust_dynamic_symbol,
1871 because this might be a case of linking PIC code which is
1872 never referenced by a dynamic object, in which case we
1873 don't need to generate a procedure linkage table entry
1876 /* If this is a local symbol, we resolve it directly without
1877 creating a procedure linkage table entry. */
1882 h
->plt
.refcount
+= 1;
1885 case R_X86_64_PLTOFF64
:
1886 /* This tries to form the 'address' of a function relative
1887 to GOT. For global symbols we need a PLT entry. */
1891 h
->plt
.refcount
+= 1;
1895 case R_X86_64_SIZE32
:
1896 case R_X86_64_SIZE64
:
1901 if (!ABI_64_P (abfd
))
1906 /* Let's help debug shared library creation. These relocs
1907 cannot be used in shared libs. Don't error out for
1908 sections we don't care about, such as debug sections or
1909 non-constant sections. */
1911 && (sec
->flags
& SEC_ALLOC
) != 0
1912 && (sec
->flags
& SEC_READONLY
) != 0)
1915 name
= h
->root
.root
.string
;
1917 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1918 (*_bfd_error_handler
)
1919 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1920 abfd
, x86_64_elf_howto_table
[r_type
].name
, name
);
1921 bfd_set_error (bfd_error_bad_value
);
1929 case R_X86_64_PC32_BND
:
1933 if (h
!= NULL
&& info
->executable
)
1935 /* If this reloc is in a read-only section, we might
1936 need a copy reloc. We can't check reliably at this
1937 stage whether the section is read-only, as input
1938 sections have not yet been mapped to output sections.
1939 Tentatively set the flag for now, and correct in
1940 adjust_dynamic_symbol. */
1943 /* We may need a .plt entry if the function this reloc
1944 refers to is in a shared lib. */
1945 h
->plt
.refcount
+= 1;
1946 if (r_type
!= R_X86_64_PC32
1947 && r_type
!= R_X86_64_PC32_BND
1948 && r_type
!= R_X86_64_PC64
)
1949 h
->pointer_equality_needed
= 1;
1954 /* If we are creating a shared library, and this is a reloc
1955 against a global symbol, or a non PC relative reloc
1956 against a local symbol, then we need to copy the reloc
1957 into the shared library. However, if we are linking with
1958 -Bsymbolic, we do not need to copy a reloc against a
1959 global symbol which is defined in an object we are
1960 including in the link (i.e., DEF_REGULAR is set). At
1961 this point we have not seen all the input files, so it is
1962 possible that DEF_REGULAR is not set now but will be set
1963 later (it is never cleared). In case of a weak definition,
1964 DEF_REGULAR may be cleared later by a strong definition in
1965 a shared library. We account for that possibility below by
1966 storing information in the relocs_copied field of the hash
1967 table entry. A similar situation occurs when creating
1968 shared libraries and symbol visibility changes render the
1971 If on the other hand, we are creating an executable, we
1972 may need to keep relocations for symbols satisfied by a
1973 dynamic library if we manage to avoid copy relocs for the
1976 && (sec
->flags
& SEC_ALLOC
) != 0
1977 && (! IS_X86_64_PCREL_TYPE (r_type
)
1979 && (! SYMBOLIC_BIND (info
, h
)
1980 || h
->root
.type
== bfd_link_hash_defweak
1981 || !h
->def_regular
))))
1982 || (ELIMINATE_COPY_RELOCS
1984 && (sec
->flags
& SEC_ALLOC
) != 0
1986 && (h
->root
.type
== bfd_link_hash_defweak
1987 || !h
->def_regular
)))
1989 struct elf_dyn_relocs
*p
;
1990 struct elf_dyn_relocs
**head
;
1992 /* We must copy these reloc types into the output file.
1993 Create a reloc section in dynobj and make room for
1997 if (htab
->elf
.dynobj
== NULL
)
1998 htab
->elf
.dynobj
= abfd
;
2000 sreloc
= _bfd_elf_make_dynamic_reloc_section
2001 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2002 abfd
, /*rela?*/ TRUE
);
2008 /* If this is a global symbol, we count the number of
2009 relocations we need for this symbol. */
2012 head
= &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
2016 /* Track dynamic relocs needed for local syms too.
2017 We really need local syms available to do this
2022 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2027 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2031 /* Beware of type punned pointers vs strict aliasing
2033 vpp
= &(elf_section_data (s
)->local_dynrel
);
2034 head
= (struct elf_dyn_relocs
**)vpp
;
2038 if (p
== NULL
|| p
->sec
!= sec
)
2040 bfd_size_type amt
= sizeof *p
;
2042 p
= ((struct elf_dyn_relocs
*)
2043 bfd_alloc (htab
->elf
.dynobj
, amt
));
2054 /* Count size relocation as PC-relative relocation. */
2055 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
2060 /* This relocation describes the C++ object vtable hierarchy.
2061 Reconstruct it for later use during GC. */
2062 case R_X86_64_GNU_VTINHERIT
:
2063 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2067 /* This relocation describes which C++ vtable entries are actually
2068 used. Record for later use during GC. */
2069 case R_X86_64_GNU_VTENTRY
:
2070 BFD_ASSERT (h
!= NULL
);
2072 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2082 && h
->plt
.refcount
> 0
2083 && (((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2084 || h
->got
.refcount
> 0)
2085 && htab
->plt_got
== NULL
)
2087 /* Create the GOT procedure linkage table. */
2088 unsigned int plt_got_align
;
2089 const struct elf_backend_data
*bed
;
2091 bed
= get_elf_backend_data (info
->output_bfd
);
2092 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry
) == 8
2093 && (sizeof (elf_x86_64_bnd_plt2_entry
)
2094 == sizeof (elf_x86_64_legacy_plt2_entry
)));
2097 if (htab
->elf
.dynobj
== NULL
)
2098 htab
->elf
.dynobj
= abfd
;
2100 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
2102 (bed
->dynamic_sec_flags
2107 if (htab
->plt_got
== NULL
2108 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
2114 if (r_type
== R_X86_64_GOTPCREL
2115 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2116 sec
->need_convert_mov_to_lea
= 1;
2122 /* Return the section that should be marked against GC for a given
2126 elf_x86_64_gc_mark_hook (asection
*sec
,
2127 struct bfd_link_info
*info
,
2128 Elf_Internal_Rela
*rel
,
2129 struct elf_link_hash_entry
*h
,
2130 Elf_Internal_Sym
*sym
)
2133 switch (ELF32_R_TYPE (rel
->r_info
))
2135 case R_X86_64_GNU_VTINHERIT
:
2136 case R_X86_64_GNU_VTENTRY
:
2140 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2143 /* Update the got entry reference counts for the section being removed. */
2146 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
2148 const Elf_Internal_Rela
*relocs
)
2150 struct elf_x86_64_link_hash_table
*htab
;
2151 Elf_Internal_Shdr
*symtab_hdr
;
2152 struct elf_link_hash_entry
**sym_hashes
;
2153 bfd_signed_vma
*local_got_refcounts
;
2154 const Elf_Internal_Rela
*rel
, *relend
;
2156 if (info
->relocatable
)
2159 htab
= elf_x86_64_hash_table (info
);
2163 elf_section_data (sec
)->local_dynrel
= NULL
;
2165 symtab_hdr
= &elf_symtab_hdr (abfd
);
2166 sym_hashes
= elf_sym_hashes (abfd
);
2167 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2169 htab
= elf_x86_64_hash_table (info
);
2170 relend
= relocs
+ sec
->reloc_count
;
2171 for (rel
= relocs
; rel
< relend
; rel
++)
2173 unsigned long r_symndx
;
2174 unsigned int r_type
;
2175 struct elf_link_hash_entry
*h
= NULL
;
2177 r_symndx
= htab
->r_sym (rel
->r_info
);
2178 if (r_symndx
>= symtab_hdr
->sh_info
)
2180 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2181 while (h
->root
.type
== bfd_link_hash_indirect
2182 || h
->root
.type
== bfd_link_hash_warning
)
2183 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2187 /* A local symbol. */
2188 Elf_Internal_Sym
*isym
;
2190 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2193 /* Check relocation against local STT_GNU_IFUNC symbol. */
2195 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2197 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2205 struct elf_x86_64_link_hash_entry
*eh
;
2206 struct elf_dyn_relocs
**pp
;
2207 struct elf_dyn_relocs
*p
;
2209 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2211 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2214 /* Everything must go for SEC. */
2220 r_type
= ELF32_R_TYPE (rel
->r_info
);
2221 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
2222 symtab_hdr
, sym_hashes
,
2223 &r_type
, GOT_UNKNOWN
,
2224 rel
, relend
, h
, r_symndx
))
2229 case R_X86_64_TLSLD
:
2230 if (htab
->tls_ld_got
.refcount
> 0)
2231 htab
->tls_ld_got
.refcount
-= 1;
2234 case R_X86_64_TLSGD
:
2235 case R_X86_64_GOTPC32_TLSDESC
:
2236 case R_X86_64_TLSDESC_CALL
:
2237 case R_X86_64_GOTTPOFF
:
2238 case R_X86_64_GOT32
:
2239 case R_X86_64_GOTPCREL
:
2240 case R_X86_64_GOT64
:
2241 case R_X86_64_GOTPCREL64
:
2242 case R_X86_64_GOTPLT64
:
2245 if (h
->got
.refcount
> 0)
2246 h
->got
.refcount
-= 1;
2247 if (h
->type
== STT_GNU_IFUNC
)
2249 if (h
->plt
.refcount
> 0)
2250 h
->plt
.refcount
-= 1;
2253 else if (local_got_refcounts
!= NULL
)
2255 if (local_got_refcounts
[r_symndx
] > 0)
2256 local_got_refcounts
[r_symndx
] -= 1;
2268 case R_X86_64_PC32_BND
:
2270 case R_X86_64_SIZE32
:
2271 case R_X86_64_SIZE64
:
2273 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2277 case R_X86_64_PLT32
:
2278 case R_X86_64_PLT32_BND
:
2279 case R_X86_64_PLTOFF64
:
2282 if (h
->plt
.refcount
> 0)
2283 h
->plt
.refcount
-= 1;
2295 /* Adjust a symbol defined by a dynamic object and referenced by a
2296 regular object. The current definition is in some section of the
2297 dynamic object, but we're not including those sections. We have to
2298 change the definition to something the rest of the link can
2302 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2303 struct elf_link_hash_entry
*h
)
2305 struct elf_x86_64_link_hash_table
*htab
;
2307 struct elf_x86_64_link_hash_entry
*eh
;
2308 struct elf_dyn_relocs
*p
;
2310 /* STT_GNU_IFUNC symbol must go through PLT. */
2311 if (h
->type
== STT_GNU_IFUNC
)
2313 /* All local STT_GNU_IFUNC references must be treate as local
2314 calls via local PLT. */
2316 && SYMBOL_CALLS_LOCAL (info
, h
))
2318 bfd_size_type pc_count
= 0, count
= 0;
2319 struct elf_dyn_relocs
**pp
;
2321 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2322 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2324 pc_count
+= p
->pc_count
;
2325 p
->count
-= p
->pc_count
;
2334 if (pc_count
|| count
)
2338 if (h
->plt
.refcount
<= 0)
2339 h
->plt
.refcount
= 1;
2341 h
->plt
.refcount
+= 1;
2345 if (h
->plt
.refcount
<= 0)
2347 h
->plt
.offset
= (bfd_vma
) -1;
2353 /* If this is a function, put it in the procedure linkage table. We
2354 will fill in the contents of the procedure linkage table later,
2355 when we know the address of the .got section. */
2356 if (h
->type
== STT_FUNC
2359 if (h
->plt
.refcount
<= 0
2360 || SYMBOL_CALLS_LOCAL (info
, h
)
2361 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2362 && h
->root
.type
== bfd_link_hash_undefweak
))
2364 /* This case can occur if we saw a PLT32 reloc in an input
2365 file, but the symbol was never referred to by a dynamic
2366 object, or if all references were garbage collected. In
2367 such a case, we don't actually need to build a procedure
2368 linkage table, and we can just do a PC32 reloc instead. */
2369 h
->plt
.offset
= (bfd_vma
) -1;
2376 /* It's possible that we incorrectly decided a .plt reloc was
2377 needed for an R_X86_64_PC32 reloc to a non-function sym in
2378 check_relocs. We can't decide accurately between function and
2379 non-function syms in check-relocs; Objects loaded later in
2380 the link may change h->type. So fix it now. */
2381 h
->plt
.offset
= (bfd_vma
) -1;
2383 /* If this is a weak symbol, and there is a real definition, the
2384 processor independent code will have arranged for us to see the
2385 real definition first, and we can just use the same value. */
2386 if (h
->u
.weakdef
!= NULL
)
2388 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2389 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2390 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2391 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2392 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2394 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2395 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2396 eh
->needs_copy
= h
->u
.weakdef
->needs_copy
;
2401 /* This is a reference to a symbol defined by a dynamic object which
2402 is not a function. */
2404 /* If we are creating a shared library, we must presume that the
2405 only references to the symbol are via the global offset table.
2406 For such cases we need not do anything here; the relocations will
2407 be handled correctly by relocate_section. */
2408 if (!info
->executable
)
2411 /* If there are no references to this symbol that do not use the
2412 GOT, we don't need to generate a copy reloc. */
2413 if (!h
->non_got_ref
)
2416 /* If -z nocopyreloc was given, we won't generate them either. */
2417 if (info
->nocopyreloc
)
2423 if (ELIMINATE_COPY_RELOCS
)
2425 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2426 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2428 s
= p
->sec
->output_section
;
2429 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2433 /* If we didn't find any dynamic relocs in read-only sections, then
2434 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2442 /* We must allocate the symbol in our .dynbss section, which will
2443 become part of the .bss section of the executable. There will be
2444 an entry for this symbol in the .dynsym section. The dynamic
2445 object will contain position independent code, so all references
2446 from the dynamic object to this symbol will go through the global
2447 offset table. The dynamic linker will use the .dynsym entry to
2448 determine the address it must put in the global offset table, so
2449 both the dynamic object and the regular object will refer to the
2450 same memory location for the variable. */
2452 htab
= elf_x86_64_hash_table (info
);
2456 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2457 to copy the initial value out of the dynamic object and into the
2458 runtime process image. */
2459 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2461 const struct elf_backend_data
*bed
;
2462 bed
= get_elf_backend_data (info
->output_bfd
);
2463 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2469 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2472 /* Allocate space in .plt, .got and associated reloc sections for
2476 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2478 struct bfd_link_info
*info
;
2479 struct elf_x86_64_link_hash_table
*htab
;
2480 struct elf_x86_64_link_hash_entry
*eh
;
2481 struct elf_dyn_relocs
*p
;
2482 const struct elf_backend_data
*bed
;
2483 unsigned int plt_entry_size
;
2485 if (h
->root
.type
== bfd_link_hash_indirect
)
2488 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2490 info
= (struct bfd_link_info
*) inf
;
2491 htab
= elf_x86_64_hash_table (info
);
2494 bed
= get_elf_backend_data (info
->output_bfd
);
2495 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2497 /* We can't use the GOT PLT if pointer equality is needed since
2498 finish_dynamic_symbol won't clear symbol value and the dynamic
2499 linker won't update the GOT slot. We will get into an infinite
2500 loop at run-time. */
2501 if (htab
->plt_got
!= NULL
2502 && h
->type
!= STT_GNU_IFUNC
2503 && !h
->pointer_equality_needed
2504 && h
->plt
.refcount
> 0
2505 && h
->got
.refcount
> 0)
2507 /* Don't use the regular PLT if there are both GOT and GOTPLT
2509 h
->plt
.offset
= (bfd_vma
) -1;
2511 /* Use the GOT PLT. */
2512 eh
->plt_got
.refcount
= 1;
2515 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2516 here if it is defined and referenced in a non-shared object. */
2517 if (h
->type
== STT_GNU_IFUNC
2520 if (_bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2526 asection
*s
= htab
->plt_bnd
;
2527 if (h
->plt
.offset
!= (bfd_vma
) -1 && s
!= NULL
)
2529 /* Use the .plt.bnd section if it is created. */
2530 eh
->plt_bnd
.offset
= s
->size
;
2532 /* Make room for this entry in the .plt.bnd section. */
2533 s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2541 else if (htab
->elf
.dynamic_sections_created
2542 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2544 bfd_boolean use_plt_got
;
2546 if ((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2548 /* Don't use the regular PLT for DF_BIND_NOW. */
2549 h
->plt
.offset
= (bfd_vma
) -1;
2551 /* Use the GOT PLT. */
2552 h
->got
.refcount
= 1;
2553 eh
->plt_got
.refcount
= 1;
2556 use_plt_got
= eh
->plt_got
.refcount
> 0;
2558 /* Make sure this symbol is output as a dynamic symbol.
2559 Undefined weak syms won't yet be marked as dynamic. */
2560 if (h
->dynindx
== -1
2561 && !h
->forced_local
)
2563 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2568 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2570 asection
*s
= htab
->elf
.splt
;
2571 asection
*bnd_s
= htab
->plt_bnd
;
2572 asection
*got_s
= htab
->plt_got
;
2574 /* If this is the first .plt entry, make room for the special
2575 first entry. The .plt section is used by prelink to undo
2576 prelinking for dynamic relocations. */
2578 s
->size
= plt_entry_size
;
2581 eh
->plt_got
.offset
= got_s
->size
;
2584 h
->plt
.offset
= s
->size
;
2586 eh
->plt_bnd
.offset
= bnd_s
->size
;
2589 /* If this symbol is not defined in a regular file, and we are
2590 not generating a shared library, then set the symbol to this
2591 location in the .plt. This is required to make function
2592 pointers compare as equal between the normal executable and
2593 the shared library. */
2599 /* We need to make a call to the entry of the GOT PLT
2600 instead of regular PLT entry. */
2601 h
->root
.u
.def
.section
= got_s
;
2602 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2608 /* We need to make a call to the entry of the second
2609 PLT instead of regular PLT entry. */
2610 h
->root
.u
.def
.section
= bnd_s
;
2611 h
->root
.u
.def
.value
= eh
->plt_bnd
.offset
;
2615 h
->root
.u
.def
.section
= s
;
2616 h
->root
.u
.def
.value
= h
->plt
.offset
;
2621 /* Make room for this entry. */
2623 got_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2626 s
->size
+= plt_entry_size
;
2628 bnd_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2630 /* We also need to make an entry in the .got.plt section,
2631 which will be placed in the .got section by the linker
2633 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2635 /* We also need to make an entry in the .rela.plt
2637 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2638 htab
->elf
.srelplt
->reloc_count
++;
2643 h
->plt
.offset
= (bfd_vma
) -1;
2649 h
->plt
.offset
= (bfd_vma
) -1;
2653 eh
->tlsdesc_got
= (bfd_vma
) -1;
2655 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2656 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2657 if (h
->got
.refcount
> 0
2660 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2662 h
->got
.offset
= (bfd_vma
) -1;
2664 else if (h
->got
.refcount
> 0)
2668 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2670 /* Make sure this symbol is output as a dynamic symbol.
2671 Undefined weak syms won't yet be marked as dynamic. */
2672 if (h
->dynindx
== -1
2673 && !h
->forced_local
)
2675 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2679 if (GOT_TLS_GDESC_P (tls_type
))
2681 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2682 - elf_x86_64_compute_jump_table_size (htab
);
2683 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2684 h
->got
.offset
= (bfd_vma
) -2;
2686 if (! GOT_TLS_GDESC_P (tls_type
)
2687 || GOT_TLS_GD_P (tls_type
))
2690 h
->got
.offset
= s
->size
;
2691 s
->size
+= GOT_ENTRY_SIZE
;
2692 if (GOT_TLS_GD_P (tls_type
))
2693 s
->size
+= GOT_ENTRY_SIZE
;
2695 dyn
= htab
->elf
.dynamic_sections_created
;
2696 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2698 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2699 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2700 || tls_type
== GOT_TLS_IE
)
2701 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2702 else if (GOT_TLS_GD_P (tls_type
))
2703 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2704 else if (! GOT_TLS_GDESC_P (tls_type
)
2705 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2706 || h
->root
.type
!= bfd_link_hash_undefweak
)
2708 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2709 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2710 if (GOT_TLS_GDESC_P (tls_type
))
2712 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2713 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2717 h
->got
.offset
= (bfd_vma
) -1;
2719 if (eh
->dyn_relocs
== NULL
)
2722 /* In the shared -Bsymbolic case, discard space allocated for
2723 dynamic pc-relative relocs against symbols which turn out to be
2724 defined in regular objects. For the normal shared case, discard
2725 space for pc-relative relocs that have become local due to symbol
2726 visibility changes. */
2730 /* Relocs that use pc_count are those that appear on a call
2731 insn, or certain REL relocs that can generated via assembly.
2732 We want calls to protected symbols to resolve directly to the
2733 function rather than going via the plt. If people want
2734 function pointer comparisons to work as expected then they
2735 should avoid writing weird assembly. */
2736 if (SYMBOL_CALLS_LOCAL (info
, h
))
2738 struct elf_dyn_relocs
**pp
;
2740 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2742 p
->count
-= p
->pc_count
;
2751 /* Also discard relocs on undefined weak syms with non-default
2753 if (eh
->dyn_relocs
!= NULL
)
2755 if (h
->root
.type
== bfd_link_hash_undefweak
)
2757 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2758 eh
->dyn_relocs
= NULL
;
2760 /* Make sure undefined weak symbols are output as a dynamic
2762 else if (h
->dynindx
== -1
2763 && ! h
->forced_local
2764 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2767 /* For PIE, discard space for pc-relative relocs against
2768 symbols which turn out to need copy relocs. */
2769 else if (info
->executable
2770 && (h
->needs_copy
|| eh
->needs_copy
)
2774 struct elf_dyn_relocs
**pp
;
2776 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2778 if (p
->pc_count
!= 0)
2786 else if (ELIMINATE_COPY_RELOCS
)
2788 /* For the non-shared case, discard space for relocs against
2789 symbols which turn out to need copy relocs or are not
2795 || (htab
->elf
.dynamic_sections_created
2796 && (h
->root
.type
== bfd_link_hash_undefweak
2797 || h
->root
.type
== bfd_link_hash_undefined
))))
2799 /* Make sure this symbol is output as a dynamic symbol.
2800 Undefined weak syms won't yet be marked as dynamic. */
2801 if (h
->dynindx
== -1
2802 && ! h
->forced_local
2803 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2806 /* If that succeeded, we know we'll be keeping all the
2808 if (h
->dynindx
!= -1)
2812 eh
->dyn_relocs
= NULL
;
2817 /* Finally, allocate space. */
2818 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2822 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2824 BFD_ASSERT (sreloc
!= NULL
);
2826 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2832 /* Allocate space in .plt, .got and associated reloc sections for
2833 local dynamic relocs. */
2836 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2838 struct elf_link_hash_entry
*h
2839 = (struct elf_link_hash_entry
*) *slot
;
2841 if (h
->type
!= STT_GNU_IFUNC
2845 || h
->root
.type
!= bfd_link_hash_defined
)
2848 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2851 /* Find any dynamic relocs that apply to read-only sections. */
2854 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2857 struct elf_x86_64_link_hash_entry
*eh
;
2858 struct elf_dyn_relocs
*p
;
2860 /* Skip local IFUNC symbols. */
2861 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2864 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2865 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2867 asection
*s
= p
->sec
->output_section
;
2869 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2871 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2873 info
->flags
|= DF_TEXTREL
;
2875 if ((info
->warn_shared_textrel
&& info
->shared
)
2876 || info
->error_textrel
)
2877 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2878 p
->sec
->owner
, h
->root
.root
.string
,
2881 /* Not an error, just cut short the traversal. */
2889 mov foo@GOTPCREL(%rip), %reg
2892 with the local symbol, foo. */
2895 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2896 struct bfd_link_info
*link_info
)
2898 Elf_Internal_Shdr
*symtab_hdr
;
2899 Elf_Internal_Rela
*internal_relocs
;
2900 Elf_Internal_Rela
*irel
, *irelend
;
2902 struct elf_x86_64_link_hash_table
*htab
;
2903 bfd_boolean changed_contents
;
2904 bfd_boolean changed_relocs
;
2905 bfd_signed_vma
*local_got_refcounts
;
2906 bfd_vma maxpagesize
;
2908 /* Don't even try to convert non-ELF outputs. */
2909 if (!is_elf_hash_table (link_info
->hash
))
2912 /* Nothing to do if there is no need or no output. */
2913 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2914 || sec
->need_convert_mov_to_lea
== 0
2915 || bfd_is_abs_section (sec
->output_section
))
2918 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2920 /* Load the relocations for this section. */
2921 internal_relocs
= (_bfd_elf_link_read_relocs
2922 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2923 link_info
->keep_memory
));
2924 if (internal_relocs
== NULL
)
2927 htab
= elf_x86_64_hash_table (link_info
);
2928 changed_contents
= FALSE
;
2929 changed_relocs
= FALSE
;
2930 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2931 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
2933 /* Get the section contents. */
2934 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2935 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2938 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2942 irelend
= internal_relocs
+ sec
->reloc_count
;
2943 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2945 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2946 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2948 struct elf_link_hash_entry
*h
;
2954 } convert_mov_to_lea
;
2956 if (r_type
!= R_X86_64_GOTPCREL
)
2959 roff
= irel
->r_offset
;
2961 /* Don't convert R_X86_64_GOTPCREL relocation if it isn't for mov
2964 || bfd_get_8 (abfd
, contents
+ roff
- 2) != 0x8b)
2968 convert_mov_to_lea
= none
;
2970 /* Get the symbol referred to by the reloc. */
2971 if (r_symndx
< symtab_hdr
->sh_info
)
2973 Elf_Internal_Sym
*isym
;
2975 /* Silence older GCC warning. */
2978 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2981 symtype
= ELF_ST_TYPE (isym
->st_info
);
2983 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation and
2984 skip relocation against undefined symbols. */
2985 if (symtype
!= STT_GNU_IFUNC
&& isym
->st_shndx
!= SHN_UNDEF
)
2987 if (isym
->st_shndx
== SHN_ABS
)
2988 tsec
= bfd_abs_section_ptr
;
2989 else if (isym
->st_shndx
== SHN_COMMON
)
2990 tsec
= bfd_com_section_ptr
;
2991 else if (isym
->st_shndx
== SHN_X86_64_LCOMMON
)
2992 tsec
= &_bfd_elf_large_com_section
;
2994 tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2996 toff
= isym
->st_value
;
2997 convert_mov_to_lea
= local
;
3002 indx
= r_symndx
- symtab_hdr
->sh_info
;
3003 h
= elf_sym_hashes (abfd
)[indx
];
3004 BFD_ASSERT (h
!= NULL
);
3006 while (h
->root
.type
== bfd_link_hash_indirect
3007 || h
->root
.type
== bfd_link_hash_warning
)
3008 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3010 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
3011 avoid optimizing _DYNAMIC since ld.so may use its link-time
3014 && h
->type
!= STT_GNU_IFUNC
3015 && h
!= htab
->elf
.hdynamic
3016 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
3018 tsec
= h
->root
.u
.def
.section
;
3019 toff
= h
->root
.u
.def
.value
;
3021 convert_mov_to_lea
= global
;
3025 if (convert_mov_to_lea
== none
)
3028 if (tsec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
3030 /* At this stage in linking, no SEC_MERGE symbol has been
3031 adjusted, so all references to such symbols need to be
3032 passed through _bfd_merged_section_offset. (Later, in
3033 relocate_section, all SEC_MERGE symbols *except* for
3034 section symbols have been adjusted.)
3036 gas may reduce relocations against symbols in SEC_MERGE
3037 sections to a relocation against the section symbol when
3038 the original addend was zero. When the reloc is against
3039 a section symbol we should include the addend in the
3040 offset passed to _bfd_merged_section_offset, since the
3041 location of interest is the original symbol. On the
3042 other hand, an access to "sym+addend" where "sym" is not
3043 a section symbol should not include the addend; Such an
3044 access is presumed to be an offset from "sym"; The
3045 location of interest is just "sym". */
3046 if (symtype
== STT_SECTION
)
3047 toff
+= irel
->r_addend
;
3049 toff
= _bfd_merged_section_offset (abfd
, &tsec
,
3050 elf_section_data (tsec
)->sec_info
,
3053 if (symtype
!= STT_SECTION
)
3054 toff
+= irel
->r_addend
;
3057 toff
+= irel
->r_addend
;
3059 /* Don't convert if R_X86_64_PC32 relocation overflows. */
3060 if (tsec
->output_section
== sec
->output_section
)
3062 if ((toff
- roff
+ 0x80000000) > 0xffffffff)
3070 /* At this point, we don't know the load addresses of TSEC
3071 section nor SEC section. We estimate the distrance between
3074 for (asect
= sec
->output_section
;
3075 asect
!= NULL
&& asect
!= tsec
->output_section
;
3076 asect
= asect
->next
)
3079 for (i
= asect
->output_section
->map_head
.s
;
3083 size
= align_power (size
, i
->alignment_power
);
3088 /* Don't convert R_X86_64_GOTPCREL if TSEC isn't placed after
3093 /* Take PT_GNU_RELRO segment into account by adding
3095 if ((toff
+ size
+ maxpagesize
- roff
+ 0x80000000)
3100 bfd_put_8 (abfd
, 0x8d, contents
+ roff
- 2);
3101 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
3102 changed_contents
= TRUE
;
3103 changed_relocs
= TRUE
;
3105 if (convert_mov_to_lea
== local
)
3107 if (local_got_refcounts
!= NULL
3108 && local_got_refcounts
[r_symndx
] > 0)
3109 local_got_refcounts
[r_symndx
] -= 1;
3113 if (h
->got
.refcount
> 0)
3114 h
->got
.refcount
-= 1;
3118 if (contents
!= NULL
3119 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3121 if (!changed_contents
&& !link_info
->keep_memory
)
3125 /* Cache the section contents for elf_link_input_bfd. */
3126 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3130 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3132 if (!changed_relocs
)
3133 free (internal_relocs
);
3135 elf_section_data (sec
)->relocs
= internal_relocs
;
3141 if (contents
!= NULL
3142 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3144 if (internal_relocs
!= NULL
3145 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3146 free (internal_relocs
);
3150 /* Set the sizes of the dynamic sections. */
3153 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
3154 struct bfd_link_info
*info
)
3156 struct elf_x86_64_link_hash_table
*htab
;
3161 const struct elf_backend_data
*bed
;
3163 htab
= elf_x86_64_hash_table (info
);
3166 bed
= get_elf_backend_data (output_bfd
);
3168 dynobj
= htab
->elf
.dynobj
;
3172 if (htab
->elf
.dynamic_sections_created
)
3174 /* Set the contents of the .interp section to the interpreter. */
3175 if (info
->executable
)
3177 s
= bfd_get_linker_section (dynobj
, ".interp");
3180 s
->size
= htab
->dynamic_interpreter_size
;
3181 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
3185 /* Set up .got offsets for local syms, and space for local dynamic
3187 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3189 bfd_signed_vma
*local_got
;
3190 bfd_signed_vma
*end_local_got
;
3191 char *local_tls_type
;
3192 bfd_vma
*local_tlsdesc_gotent
;
3193 bfd_size_type locsymcount
;
3194 Elf_Internal_Shdr
*symtab_hdr
;
3197 if (! is_x86_64_elf (ibfd
))
3200 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3202 struct elf_dyn_relocs
*p
;
3204 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
3207 for (p
= (struct elf_dyn_relocs
*)
3208 (elf_section_data (s
)->local_dynrel
);
3212 if (!bfd_is_abs_section (p
->sec
)
3213 && bfd_is_abs_section (p
->sec
->output_section
))
3215 /* Input section has been discarded, either because
3216 it is a copy of a linkonce section or due to
3217 linker script /DISCARD/, so we'll be discarding
3220 else if (p
->count
!= 0)
3222 srel
= elf_section_data (p
->sec
)->sreloc
;
3223 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3224 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3225 && (info
->flags
& DF_TEXTREL
) == 0)
3227 info
->flags
|= DF_TEXTREL
;
3228 if ((info
->warn_shared_textrel
&& info
->shared
)
3229 || info
->error_textrel
)
3230 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3231 p
->sec
->owner
, p
->sec
);
3237 local_got
= elf_local_got_refcounts (ibfd
);
3241 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3242 locsymcount
= symtab_hdr
->sh_info
;
3243 end_local_got
= local_got
+ locsymcount
;
3244 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
3245 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
3247 srel
= htab
->elf
.srelgot
;
3248 for (; local_got
< end_local_got
;
3249 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3251 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3254 if (GOT_TLS_GDESC_P (*local_tls_type
))
3256 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3257 - elf_x86_64_compute_jump_table_size (htab
);
3258 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3259 *local_got
= (bfd_vma
) -2;
3261 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3262 || GOT_TLS_GD_P (*local_tls_type
))
3264 *local_got
= s
->size
;
3265 s
->size
+= GOT_ENTRY_SIZE
;
3266 if (GOT_TLS_GD_P (*local_tls_type
))
3267 s
->size
+= GOT_ENTRY_SIZE
;
3270 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3271 || *local_tls_type
== GOT_TLS_IE
)
3273 if (GOT_TLS_GDESC_P (*local_tls_type
))
3275 htab
->elf
.srelplt
->size
3276 += bed
->s
->sizeof_rela
;
3277 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3279 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3280 || GOT_TLS_GD_P (*local_tls_type
))
3281 srel
->size
+= bed
->s
->sizeof_rela
;
3285 *local_got
= (bfd_vma
) -1;
3289 if (htab
->tls_ld_got
.refcount
> 0)
3291 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3293 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
3294 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
3295 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3298 htab
->tls_ld_got
.offset
= -1;
3300 /* Allocate global sym .plt and .got entries, and space for global
3301 sym dynamic relocs. */
3302 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
3305 /* Allocate .plt and .got entries, and space for local symbols. */
3306 htab_traverse (htab
->loc_hash_table
,
3307 elf_x86_64_allocate_local_dynrelocs
,
3310 /* For every jump slot reserved in the sgotplt, reloc_count is
3311 incremented. However, when we reserve space for TLS descriptors,
3312 it's not incremented, so in order to compute the space reserved
3313 for them, it suffices to multiply the reloc count by the jump
3316 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3317 so that R_X86_64_IRELATIVE entries come last. */
3318 if (htab
->elf
.srelplt
)
3320 htab
->sgotplt_jump_table_size
3321 = elf_x86_64_compute_jump_table_size (htab
);
3322 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3324 else if (htab
->elf
.irelplt
)
3325 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3327 if (htab
->tlsdesc_plt
)
3329 /* If we're not using lazy TLS relocations, don't generate the
3330 PLT and GOT entries they require. */
3331 if ((info
->flags
& DF_BIND_NOW
))
3332 htab
->tlsdesc_plt
= 0;
3335 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
3336 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
3337 /* Reserve room for the initial entry.
3338 FIXME: we could probably do away with it in this case. */
3339 if (htab
->elf
.splt
->size
== 0)
3340 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3341 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
3342 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3346 if (htab
->elf
.sgotplt
)
3348 /* Don't allocate .got.plt section if there are no GOT nor PLT
3349 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3350 if ((htab
->elf
.hgot
== NULL
3351 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3352 && (htab
->elf
.sgotplt
->size
3353 == get_elf_backend_data (output_bfd
)->got_header_size
)
3354 && (htab
->elf
.splt
== NULL
3355 || htab
->elf
.splt
->size
== 0)
3356 && (htab
->elf
.sgot
== NULL
3357 || htab
->elf
.sgot
->size
== 0)
3358 && (htab
->elf
.iplt
== NULL
3359 || htab
->elf
.iplt
->size
== 0)
3360 && (htab
->elf
.igotplt
== NULL
3361 || htab
->elf
.igotplt
->size
== 0))
3362 htab
->elf
.sgotplt
->size
= 0;
3365 if (htab
->plt_eh_frame
!= NULL
3366 && htab
->elf
.splt
!= NULL
3367 && htab
->elf
.splt
->size
!= 0
3368 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3369 && _bfd_elf_eh_frame_present (info
))
3371 const struct elf_x86_64_backend_data
*arch_data
3372 = get_elf_x86_64_arch_data (bed
);
3373 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
3376 /* We now have determined the sizes of the various dynamic sections.
3377 Allocate memory for them. */
3379 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3381 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3384 if (s
== htab
->elf
.splt
3385 || s
== htab
->elf
.sgot
3386 || s
== htab
->elf
.sgotplt
3387 || s
== htab
->elf
.iplt
3388 || s
== htab
->elf
.igotplt
3389 || s
== htab
->plt_bnd
3390 || s
== htab
->plt_got
3391 || s
== htab
->plt_eh_frame
3392 || s
== htab
->sdynbss
)
3394 /* Strip this section if we don't need it; see the
3397 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
3399 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3402 /* We use the reloc_count field as a counter if we need
3403 to copy relocs into the output file. */
3404 if (s
!= htab
->elf
.srelplt
)
3409 /* It's not one of our sections, so don't allocate space. */
3415 /* If we don't need this section, strip it from the
3416 output file. This is mostly to handle .rela.bss and
3417 .rela.plt. We must create both sections in
3418 create_dynamic_sections, because they must be created
3419 before the linker maps input sections to output
3420 sections. The linker does that before
3421 adjust_dynamic_symbol is called, and it is that
3422 function which decides whether anything needs to go
3423 into these sections. */
3425 s
->flags
|= SEC_EXCLUDE
;
3429 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3432 /* Allocate memory for the section contents. We use bfd_zalloc
3433 here in case unused entries are not reclaimed before the
3434 section's contents are written out. This should not happen,
3435 but this way if it does, we get a R_X86_64_NONE reloc instead
3437 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3438 if (s
->contents
== NULL
)
3442 if (htab
->plt_eh_frame
!= NULL
3443 && htab
->plt_eh_frame
->contents
!= NULL
)
3445 const struct elf_x86_64_backend_data
*arch_data
3446 = get_elf_x86_64_arch_data (bed
);
3448 memcpy (htab
->plt_eh_frame
->contents
,
3449 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3450 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3451 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3454 if (htab
->elf
.dynamic_sections_created
)
3456 /* Add some entries to the .dynamic section. We fill in the
3457 values later, in elf_x86_64_finish_dynamic_sections, but we
3458 must add the entries now so that we get the correct size for
3459 the .dynamic section. The DT_DEBUG entry is filled in by the
3460 dynamic linker and used by the debugger. */
3461 #define add_dynamic_entry(TAG, VAL) \
3462 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3464 if (info
->executable
)
3466 if (!add_dynamic_entry (DT_DEBUG
, 0))
3470 if (htab
->elf
.splt
->size
!= 0)
3472 /* DT_PLTGOT is used by prelink even if there is no PLT
3474 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3477 if (htab
->elf
.srelplt
->size
!= 0)
3479 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3480 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3481 || !add_dynamic_entry (DT_JMPREL
, 0))
3485 if (htab
->tlsdesc_plt
3486 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3487 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3493 if (!add_dynamic_entry (DT_RELA
, 0)
3494 || !add_dynamic_entry (DT_RELASZ
, 0)
3495 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3498 /* If any dynamic relocs apply to a read-only section,
3499 then we need a DT_TEXTREL entry. */
3500 if ((info
->flags
& DF_TEXTREL
) == 0)
3501 elf_link_hash_traverse (&htab
->elf
,
3502 elf_x86_64_readonly_dynrelocs
,
3505 if ((info
->flags
& DF_TEXTREL
) != 0)
3507 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3512 #undef add_dynamic_entry
3518 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3519 struct bfd_link_info
*info
)
3521 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3525 struct elf_link_hash_entry
*tlsbase
;
3527 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3528 "_TLS_MODULE_BASE_",
3529 FALSE
, FALSE
, FALSE
);
3531 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3533 struct elf_x86_64_link_hash_table
*htab
;
3534 struct bfd_link_hash_entry
*bh
= NULL
;
3535 const struct elf_backend_data
*bed
3536 = get_elf_backend_data (output_bfd
);
3538 htab
= elf_x86_64_hash_table (info
);
3542 if (!(_bfd_generic_link_add_one_symbol
3543 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3544 tls_sec
, 0, NULL
, FALSE
,
3545 bed
->collect
, &bh
)))
3548 htab
->tls_module_base
= bh
;
3550 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3551 tlsbase
->def_regular
= 1;
3552 tlsbase
->other
= STV_HIDDEN
;
3553 tlsbase
->root
.linker_def
= 1;
3554 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3561 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3562 executables. Rather than setting it to the beginning of the TLS
3563 section, we have to set it to the end. This function may be called
3564 multiple times, it is idempotent. */
3567 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3569 struct elf_x86_64_link_hash_table
*htab
;
3570 struct bfd_link_hash_entry
*base
;
3572 if (!info
->executable
)
3575 htab
= elf_x86_64_hash_table (info
);
3579 base
= htab
->tls_module_base
;
3583 base
->u
.def
.value
= htab
->elf
.tls_size
;
3586 /* Return the base VMA address which should be subtracted from real addresses
3587 when resolving @dtpoff relocation.
3588 This is PT_TLS segment p_vaddr. */
3591 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3593 /* If tls_sec is NULL, we should have signalled an error already. */
3594 if (elf_hash_table (info
)->tls_sec
== NULL
)
3596 return elf_hash_table (info
)->tls_sec
->vma
;
3599 /* Return the relocation value for @tpoff relocation
3600 if STT_TLS virtual address is ADDRESS. */
3603 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3605 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3606 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3607 bfd_vma static_tls_size
;
3609 /* If tls_segment is NULL, we should have signalled an error already. */
3610 if (htab
->tls_sec
== NULL
)
3613 /* Consider special static TLS alignment requirements. */
3614 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3615 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3618 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3622 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3624 /* Opcode Instruction
3627 0x0f 0x8x conditional jump */
3629 && (contents
[offset
- 1] == 0xe8
3630 || contents
[offset
- 1] == 0xe9))
3632 && contents
[offset
- 2] == 0x0f
3633 && (contents
[offset
- 1] & 0xf0) == 0x80));
3636 /* Relocate an x86_64 ELF section. */
3639 elf_x86_64_relocate_section (bfd
*output_bfd
,
3640 struct bfd_link_info
*info
,
3642 asection
*input_section
,
3644 Elf_Internal_Rela
*relocs
,
3645 Elf_Internal_Sym
*local_syms
,
3646 asection
**local_sections
)
3648 struct elf_x86_64_link_hash_table
*htab
;
3649 Elf_Internal_Shdr
*symtab_hdr
;
3650 struct elf_link_hash_entry
**sym_hashes
;
3651 bfd_vma
*local_got_offsets
;
3652 bfd_vma
*local_tlsdesc_gotents
;
3653 Elf_Internal_Rela
*rel
;
3654 Elf_Internal_Rela
*relend
;
3655 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3657 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3659 htab
= elf_x86_64_hash_table (info
);
3662 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3663 sym_hashes
= elf_sym_hashes (input_bfd
);
3664 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3665 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3667 elf_x86_64_set_tls_module_base (info
);
3670 relend
= relocs
+ input_section
->reloc_count
;
3671 for (; rel
< relend
; rel
++)
3673 unsigned int r_type
;
3674 reloc_howto_type
*howto
;
3675 unsigned long r_symndx
;
3676 struct elf_link_hash_entry
*h
;
3677 struct elf_x86_64_link_hash_entry
*eh
;
3678 Elf_Internal_Sym
*sym
;
3680 bfd_vma off
, offplt
, plt_offset
;
3682 bfd_boolean unresolved_reloc
;
3683 bfd_reloc_status_type r
;
3685 asection
*base_got
, *resolved_plt
;
3688 r_type
= ELF32_R_TYPE (rel
->r_info
);
3689 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3690 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3693 if (r_type
>= (int) R_X86_64_standard
)
3695 (*_bfd_error_handler
)
3696 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3697 input_bfd
, input_section
, r_type
);
3698 bfd_set_error (bfd_error_bad_value
);
3702 if (r_type
!= (int) R_X86_64_32
3703 || ABI_64_P (output_bfd
))
3704 howto
= x86_64_elf_howto_table
+ r_type
;
3706 howto
= (x86_64_elf_howto_table
3707 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3708 r_symndx
= htab
->r_sym (rel
->r_info
);
3712 unresolved_reloc
= FALSE
;
3713 if (r_symndx
< symtab_hdr
->sh_info
)
3715 sym
= local_syms
+ r_symndx
;
3716 sec
= local_sections
[r_symndx
];
3718 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3720 st_size
= sym
->st_size
;
3722 /* Relocate against local STT_GNU_IFUNC symbol. */
3723 if (!info
->relocatable
3724 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3726 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3731 /* Set STT_GNU_IFUNC symbol value. */
3732 h
->root
.u
.def
.value
= sym
->st_value
;
3733 h
->root
.u
.def
.section
= sec
;
3738 bfd_boolean warned ATTRIBUTE_UNUSED
;
3739 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3741 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3742 r_symndx
, symtab_hdr
, sym_hashes
,
3744 unresolved_reloc
, warned
, ignored
);
3748 if (sec
!= NULL
&& discarded_section (sec
))
3749 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3750 rel
, 1, relend
, howto
, 0, contents
);
3752 if (info
->relocatable
)
3755 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3757 if (r_type
== R_X86_64_64
)
3759 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3760 zero-extend it to 64bit if addend is zero. */
3761 r_type
= R_X86_64_32
;
3762 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3764 else if (r_type
== R_X86_64_SIZE64
)
3766 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3767 zero-extend it to 64bit if addend is zero. */
3768 r_type
= R_X86_64_SIZE32
;
3769 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3773 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3775 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3776 it here if it is defined in a non-shared object. */
3778 && h
->type
== STT_GNU_IFUNC
3784 if ((input_section
->flags
& SEC_ALLOC
) == 0
3785 || h
->plt
.offset
== (bfd_vma
) -1)
3788 /* STT_GNU_IFUNC symbol must go through PLT. */
3789 if (htab
->elf
.splt
!= NULL
)
3791 if (htab
->plt_bnd
!= NULL
)
3793 resolved_plt
= htab
->plt_bnd
;
3794 plt_offset
= eh
->plt_bnd
.offset
;
3798 resolved_plt
= htab
->elf
.splt
;
3799 plt_offset
= h
->plt
.offset
;
3804 resolved_plt
= htab
->elf
.iplt
;
3805 plt_offset
= h
->plt
.offset
;
3808 relocation
= (resolved_plt
->output_section
->vma
3809 + resolved_plt
->output_offset
+ plt_offset
);
3814 if (h
->root
.root
.string
)
3815 name
= h
->root
.root
.string
;
3817 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3819 (*_bfd_error_handler
)
3820 (_("%B: relocation %s against STT_GNU_IFUNC "
3821 "symbol `%s' isn't handled by %s"), input_bfd
,
3822 x86_64_elf_howto_table
[r_type
].name
,
3823 name
, __FUNCTION__
);
3824 bfd_set_error (bfd_error_bad_value
);
3833 if (ABI_64_P (output_bfd
))
3837 if (rel
->r_addend
!= 0)
3839 if (h
->root
.root
.string
)
3840 name
= h
->root
.root
.string
;
3842 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3844 (*_bfd_error_handler
)
3845 (_("%B: relocation %s against STT_GNU_IFUNC "
3846 "symbol `%s' has non-zero addend: %d"),
3847 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3848 name
, rel
->r_addend
);
3849 bfd_set_error (bfd_error_bad_value
);
3853 /* Generate dynamic relcoation only when there is a
3854 non-GOT reference in a shared object. */
3855 if (info
->shared
&& h
->non_got_ref
)
3857 Elf_Internal_Rela outrel
;
3860 /* Need a dynamic relocation to get the real function
3862 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3866 if (outrel
.r_offset
== (bfd_vma
) -1
3867 || outrel
.r_offset
== (bfd_vma
) -2)
3870 outrel
.r_offset
+= (input_section
->output_section
->vma
3871 + input_section
->output_offset
);
3873 if (h
->dynindx
== -1
3875 || info
->executable
)
3877 /* This symbol is resolved locally. */
3878 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3879 outrel
.r_addend
= (h
->root
.u
.def
.value
3880 + h
->root
.u
.def
.section
->output_section
->vma
3881 + h
->root
.u
.def
.section
->output_offset
);
3885 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3886 outrel
.r_addend
= 0;
3889 sreloc
= htab
->elf
.irelifunc
;
3890 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3892 /* If this reloc is against an external symbol, we
3893 do not want to fiddle with the addend. Otherwise,
3894 we need to include the symbol value so that it
3895 becomes an addend for the dynamic reloc. For an
3896 internal symbol, we have updated addend. */
3901 case R_X86_64_PC32_BND
:
3903 case R_X86_64_PLT32
:
3904 case R_X86_64_PLT32_BND
:
3907 case R_X86_64_GOTPCREL
:
3908 case R_X86_64_GOTPCREL64
:
3909 base_got
= htab
->elf
.sgot
;
3910 off
= h
->got
.offset
;
3912 if (base_got
== NULL
)
3915 if (off
== (bfd_vma
) -1)
3917 /* We can't use h->got.offset here to save state, or
3918 even just remember the offset, as finish_dynamic_symbol
3919 would use that as offset into .got. */
3921 if (htab
->elf
.splt
!= NULL
)
3923 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3924 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3925 base_got
= htab
->elf
.sgotplt
;
3929 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3930 off
= plt_index
* GOT_ENTRY_SIZE
;
3931 base_got
= htab
->elf
.igotplt
;
3934 if (h
->dynindx
== -1
3938 /* This references the local defitionion. We must
3939 initialize this entry in the global offset table.
3940 Since the offset must always be a multiple of 8,
3941 we use the least significant bit to record
3942 whether we have initialized it already.
3944 When doing a dynamic link, we create a .rela.got
3945 relocation entry to initialize the value. This
3946 is done in the finish_dynamic_symbol routine. */
3951 bfd_put_64 (output_bfd
, relocation
,
3952 base_got
->contents
+ off
);
3953 /* Note that this is harmless for the GOTPLT64
3954 case, as -1 | 1 still is -1. */
3960 relocation
= (base_got
->output_section
->vma
3961 + base_got
->output_offset
+ off
);
3967 /* When generating a shared object, the relocations handled here are
3968 copied into the output file to be resolved at run time. */
3971 case R_X86_64_GOT32
:
3972 case R_X86_64_GOT64
:
3973 /* Relocation is to the entry for this symbol in the global
3975 case R_X86_64_GOTPCREL
:
3976 case R_X86_64_GOTPCREL64
:
3977 /* Use global offset table entry as symbol value. */
3978 case R_X86_64_GOTPLT64
:
3979 /* This is obsolete and treated the the same as GOT64. */
3980 base_got
= htab
->elf
.sgot
;
3982 if (htab
->elf
.sgot
== NULL
)
3989 off
= h
->got
.offset
;
3991 && h
->plt
.offset
!= (bfd_vma
)-1
3992 && off
== (bfd_vma
)-1)
3994 /* We can't use h->got.offset here to save
3995 state, or even just remember the offset, as
3996 finish_dynamic_symbol would use that as offset into
3998 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3999 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
4000 base_got
= htab
->elf
.sgotplt
;
4003 dyn
= htab
->elf
.dynamic_sections_created
;
4005 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
4007 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4008 || (ELF_ST_VISIBILITY (h
->other
)
4009 && h
->root
.type
== bfd_link_hash_undefweak
))
4011 /* This is actually a static link, or it is a -Bsymbolic
4012 link and the symbol is defined locally, or the symbol
4013 was forced to be local because of a version file. We
4014 must initialize this entry in the global offset table.
4015 Since the offset must always be a multiple of 8, we
4016 use the least significant bit to record whether we
4017 have initialized it already.
4019 When doing a dynamic link, we create a .rela.got
4020 relocation entry to initialize the value. This is
4021 done in the finish_dynamic_symbol routine. */
4026 bfd_put_64 (output_bfd
, relocation
,
4027 base_got
->contents
+ off
);
4028 /* Note that this is harmless for the GOTPLT64 case,
4029 as -1 | 1 still is -1. */
4034 unresolved_reloc
= FALSE
;
4038 if (local_got_offsets
== NULL
)
4041 off
= local_got_offsets
[r_symndx
];
4043 /* The offset must always be a multiple of 8. We use
4044 the least significant bit to record whether we have
4045 already generated the necessary reloc. */
4050 bfd_put_64 (output_bfd
, relocation
,
4051 base_got
->contents
+ off
);
4056 Elf_Internal_Rela outrel
;
4058 /* We need to generate a R_X86_64_RELATIVE reloc
4059 for the dynamic linker. */
4060 s
= htab
->elf
.srelgot
;
4064 outrel
.r_offset
= (base_got
->output_section
->vma
4065 + base_got
->output_offset
4067 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4068 outrel
.r_addend
= relocation
;
4069 elf_append_rela (output_bfd
, s
, &outrel
);
4072 local_got_offsets
[r_symndx
] |= 1;
4076 if (off
>= (bfd_vma
) -2)
4079 relocation
= base_got
->output_section
->vma
4080 + base_got
->output_offset
+ off
;
4081 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
4082 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4083 - htab
->elf
.sgotplt
->output_offset
;
4087 case R_X86_64_GOTOFF64
:
4088 /* Relocation is relative to the start of the global offset
4091 /* Check to make sure it isn't a protected function or data
4092 symbol for shared library since it may not be local when
4093 used as function address or with copy relocation. We also
4094 need to make sure that a symbol is referenced locally. */
4095 if (info
->shared
&& h
)
4097 if (!h
->def_regular
)
4101 switch (ELF_ST_VISIBILITY (h
->other
))
4104 v
= _("hidden symbol");
4107 v
= _("internal symbol");
4110 v
= _("protected symbol");
4117 (*_bfd_error_handler
)
4118 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
4119 input_bfd
, v
, h
->root
.root
.string
);
4120 bfd_set_error (bfd_error_bad_value
);
4123 else if (!info
->executable
4124 && !SYMBOL_REFERENCES_LOCAL (info
, h
)
4125 && (h
->type
== STT_FUNC
4126 || h
->type
== STT_OBJECT
)
4127 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4129 (*_bfd_error_handler
)
4130 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
4132 h
->type
== STT_FUNC
? "function" : "data",
4133 h
->root
.root
.string
);
4134 bfd_set_error (bfd_error_bad_value
);
4139 /* Note that sgot is not involved in this
4140 calculation. We always want the start of .got.plt. If we
4141 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4142 permitted by the ABI, we might have to change this
4144 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4145 + htab
->elf
.sgotplt
->output_offset
;
4148 case R_X86_64_GOTPC32
:
4149 case R_X86_64_GOTPC64
:
4150 /* Use global offset table as symbol value. */
4151 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4152 + htab
->elf
.sgotplt
->output_offset
;
4153 unresolved_reloc
= FALSE
;
4156 case R_X86_64_PLTOFF64
:
4157 /* Relocation is PLT entry relative to GOT. For local
4158 symbols it's the symbol itself relative to GOT. */
4160 /* See PLT32 handling. */
4161 && h
->plt
.offset
!= (bfd_vma
) -1
4162 && htab
->elf
.splt
!= NULL
)
4164 if (htab
->plt_bnd
!= NULL
)
4166 resolved_plt
= htab
->plt_bnd
;
4167 plt_offset
= eh
->plt_bnd
.offset
;
4171 resolved_plt
= htab
->elf
.splt
;
4172 plt_offset
= h
->plt
.offset
;
4175 relocation
= (resolved_plt
->output_section
->vma
4176 + resolved_plt
->output_offset
4178 unresolved_reloc
= FALSE
;
4181 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4182 + htab
->elf
.sgotplt
->output_offset
;
4185 case R_X86_64_PLT32
:
4186 case R_X86_64_PLT32_BND
:
4187 /* Relocation is to the entry for this symbol in the
4188 procedure linkage table. */
4190 /* Resolve a PLT32 reloc against a local symbol directly,
4191 without using the procedure linkage table. */
4195 if ((h
->plt
.offset
== (bfd_vma
) -1
4196 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4197 || htab
->elf
.splt
== NULL
)
4199 /* We didn't make a PLT entry for this symbol. This
4200 happens when statically linking PIC code, or when
4201 using -Bsymbolic. */
4205 if (h
->plt
.offset
!= (bfd_vma
) -1)
4207 if (htab
->plt_bnd
!= NULL
)
4209 resolved_plt
= htab
->plt_bnd
;
4210 plt_offset
= eh
->plt_bnd
.offset
;
4214 resolved_plt
= htab
->elf
.splt
;
4215 plt_offset
= h
->plt
.offset
;
4220 /* Use the GOT PLT. */
4221 resolved_plt
= htab
->plt_got
;
4222 plt_offset
= eh
->plt_got
.offset
;
4225 relocation
= (resolved_plt
->output_section
->vma
4226 + resolved_plt
->output_offset
4228 unresolved_reloc
= FALSE
;
4231 case R_X86_64_SIZE32
:
4232 case R_X86_64_SIZE64
:
4233 /* Set to symbol size. */
4234 relocation
= st_size
;
4240 case R_X86_64_PC32_BND
:
4241 /* Don't complain about -fPIC if the symbol is undefined when
4242 building executable. */
4244 && (input_section
->flags
& SEC_ALLOC
) != 0
4245 && (input_section
->flags
& SEC_READONLY
) != 0
4247 && !(info
->executable
4248 && h
->root
.type
== bfd_link_hash_undefined
))
4250 bfd_boolean fail
= FALSE
;
4252 = ((r_type
== R_X86_64_PC32
4253 || r_type
== R_X86_64_PC32_BND
)
4254 && is_32bit_relative_branch (contents
, rel
->r_offset
));
4256 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
4258 /* Symbol is referenced locally. Make sure it is
4259 defined locally or for a branch. */
4260 fail
= !h
->def_regular
&& !branch
;
4262 else if (!(info
->executable
4263 && (h
->needs_copy
|| eh
->needs_copy
)))
4265 /* Symbol doesn't need copy reloc and isn't referenced
4266 locally. We only allow branch to symbol with
4267 non-default visibility. */
4269 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
4276 const char *pic
= "";
4278 switch (ELF_ST_VISIBILITY (h
->other
))
4281 v
= _("hidden symbol");
4284 v
= _("internal symbol");
4287 v
= _("protected symbol");
4291 pic
= _("; recompile with -fPIC");
4296 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4298 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4300 (*_bfd_error_handler
) (fmt
, input_bfd
,
4301 x86_64_elf_howto_table
[r_type
].name
,
4302 v
, h
->root
.root
.string
, pic
);
4303 bfd_set_error (bfd_error_bad_value
);
4314 /* FIXME: The ABI says the linker should make sure the value is
4315 the same when it's zeroextended to 64 bit. */
4318 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4321 /* Don't copy a pc-relative relocation into the output file
4322 if the symbol needs copy reloc or the symbol is undefined
4323 when building executable. */
4325 && !(info
->executable
4329 || h
->root
.type
== bfd_link_hash_undefined
)
4330 && IS_X86_64_PCREL_TYPE (r_type
))
4332 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4333 || h
->root
.type
!= bfd_link_hash_undefweak
)
4334 && ((! IS_X86_64_PCREL_TYPE (r_type
)
4335 && r_type
!= R_X86_64_SIZE32
4336 && r_type
!= R_X86_64_SIZE64
)
4337 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
4338 || (ELIMINATE_COPY_RELOCS
4345 || h
->root
.type
== bfd_link_hash_undefweak
4346 || h
->root
.type
== bfd_link_hash_undefined
)))
4348 Elf_Internal_Rela outrel
;
4349 bfd_boolean skip
, relocate
;
4352 /* When generating a shared object, these relocations
4353 are copied into the output file to be resolved at run
4359 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4361 if (outrel
.r_offset
== (bfd_vma
) -1)
4363 else if (outrel
.r_offset
== (bfd_vma
) -2)
4364 skip
= TRUE
, relocate
= TRUE
;
4366 outrel
.r_offset
+= (input_section
->output_section
->vma
4367 + input_section
->output_offset
);
4370 memset (&outrel
, 0, sizeof outrel
);
4372 /* h->dynindx may be -1 if this symbol was marked to
4376 && (IS_X86_64_PCREL_TYPE (r_type
)
4378 || ! SYMBOLIC_BIND (info
, h
)
4379 || ! h
->def_regular
))
4381 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
4382 outrel
.r_addend
= rel
->r_addend
;
4386 /* This symbol is local, or marked to become local. */
4387 if (r_type
== htab
->pointer_r_type
)
4390 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4391 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4393 else if (r_type
== R_X86_64_64
4394 && !ABI_64_P (output_bfd
))
4397 outrel
.r_info
= htab
->r_info (0,
4398 R_X86_64_RELATIVE64
);
4399 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4400 /* Check addend overflow. */
4401 if ((outrel
.r_addend
& 0x80000000)
4402 != (rel
->r_addend
& 0x80000000))
4405 int addend
= rel
->r_addend
;
4406 if (h
&& h
->root
.root
.string
)
4407 name
= h
->root
.root
.string
;
4409 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4412 (*_bfd_error_handler
)
4413 (_("%B: addend -0x%x in relocation %s against "
4414 "symbol `%s' at 0x%lx in section `%A' is "
4416 input_bfd
, input_section
, addend
,
4417 x86_64_elf_howto_table
[r_type
].name
,
4418 name
, (unsigned long) rel
->r_offset
);
4420 (*_bfd_error_handler
)
4421 (_("%B: addend 0x%x in relocation %s against "
4422 "symbol `%s' at 0x%lx in section `%A' is "
4424 input_bfd
, input_section
, addend
,
4425 x86_64_elf_howto_table
[r_type
].name
,
4426 name
, (unsigned long) rel
->r_offset
);
4427 bfd_set_error (bfd_error_bad_value
);
4435 if (bfd_is_abs_section (sec
))
4437 else if (sec
== NULL
|| sec
->owner
== NULL
)
4439 bfd_set_error (bfd_error_bad_value
);
4446 /* We are turning this relocation into one
4447 against a section symbol. It would be
4448 proper to subtract the symbol's value,
4449 osec->vma, from the emitted reloc addend,
4450 but ld.so expects buggy relocs. */
4451 osec
= sec
->output_section
;
4452 sindx
= elf_section_data (osec
)->dynindx
;
4455 asection
*oi
= htab
->elf
.text_index_section
;
4456 sindx
= elf_section_data (oi
)->dynindx
;
4458 BFD_ASSERT (sindx
!= 0);
4461 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
4462 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4466 sreloc
= elf_section_data (input_section
)->sreloc
;
4468 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4470 r
= bfd_reloc_notsupported
;
4471 goto check_relocation_error
;
4474 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4476 /* If this reloc is against an external symbol, we do
4477 not want to fiddle with the addend. Otherwise, we
4478 need to include the symbol value so that it becomes
4479 an addend for the dynamic reloc. */
4486 case R_X86_64_TLSGD
:
4487 case R_X86_64_GOTPC32_TLSDESC
:
4488 case R_X86_64_TLSDESC_CALL
:
4489 case R_X86_64_GOTTPOFF
:
4490 tls_type
= GOT_UNKNOWN
;
4491 if (h
== NULL
&& local_got_offsets
)
4492 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
4494 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
4496 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4497 input_section
, contents
,
4498 symtab_hdr
, sym_hashes
,
4499 &r_type
, tls_type
, rel
,
4500 relend
, h
, r_symndx
))
4503 if (r_type
== R_X86_64_TPOFF32
)
4505 bfd_vma roff
= rel
->r_offset
;
4507 BFD_ASSERT (! unresolved_reloc
);
4509 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4511 /* GD->LE transition. For 64bit, change
4512 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4513 .word 0x6666; rex64; call __tls_get_addr
4516 leaq foo@tpoff(%rax), %rax
4518 leaq foo@tlsgd(%rip), %rdi
4519 .word 0x6666; rex64; call __tls_get_addr
4522 leaq foo@tpoff(%rax), %rax
4523 For largepic, change:
4524 leaq foo@tlsgd(%rip), %rdi
4525 movabsq $__tls_get_addr@pltoff, %rax
4530 leaq foo@tpoff(%rax), %rax
4531 nopw 0x0(%rax,%rax,1) */
4533 if (ABI_64_P (output_bfd
)
4534 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4536 memcpy (contents
+ roff
- 3,
4537 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4538 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4541 else if (ABI_64_P (output_bfd
))
4542 memcpy (contents
+ roff
- 4,
4543 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4546 memcpy (contents
+ roff
- 3,
4547 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4549 bfd_put_32 (output_bfd
,
4550 elf_x86_64_tpoff (info
, relocation
),
4551 contents
+ roff
+ 8 + largepic
);
4552 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4556 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4558 /* GDesc -> LE transition.
4559 It's originally something like:
4560 leaq x@tlsdesc(%rip), %rax
4563 movl $x@tpoff, %rax. */
4565 unsigned int val
, type
;
4567 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4568 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4569 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4570 contents
+ roff
- 3);
4571 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4572 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4573 contents
+ roff
- 1);
4574 bfd_put_32 (output_bfd
,
4575 elf_x86_64_tpoff (info
, relocation
),
4579 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4581 /* GDesc -> LE transition.
4586 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4587 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4590 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4592 /* IE->LE transition:
4593 For 64bit, originally it can be one of:
4594 movq foo@gottpoff(%rip), %reg
4595 addq foo@gottpoff(%rip), %reg
4598 leaq foo(%reg), %reg
4600 For 32bit, originally it can be one of:
4601 movq foo@gottpoff(%rip), %reg
4602 addl foo@gottpoff(%rip), %reg
4605 leal foo(%reg), %reg
4608 unsigned int val
, type
, reg
;
4611 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4614 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4615 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4621 bfd_put_8 (output_bfd
, 0x49,
4622 contents
+ roff
- 3);
4623 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4624 bfd_put_8 (output_bfd
, 0x41,
4625 contents
+ roff
- 3);
4626 bfd_put_8 (output_bfd
, 0xc7,
4627 contents
+ roff
- 2);
4628 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4629 contents
+ roff
- 1);
4633 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4636 bfd_put_8 (output_bfd
, 0x49,
4637 contents
+ roff
- 3);
4638 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4639 bfd_put_8 (output_bfd
, 0x41,
4640 contents
+ roff
- 3);
4641 bfd_put_8 (output_bfd
, 0x81,
4642 contents
+ roff
- 2);
4643 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4644 contents
+ roff
- 1);
4648 /* addq/addl -> leaq/leal */
4650 bfd_put_8 (output_bfd
, 0x4d,
4651 contents
+ roff
- 3);
4652 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4653 bfd_put_8 (output_bfd
, 0x45,
4654 contents
+ roff
- 3);
4655 bfd_put_8 (output_bfd
, 0x8d,
4656 contents
+ roff
- 2);
4657 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4658 contents
+ roff
- 1);
4660 bfd_put_32 (output_bfd
,
4661 elf_x86_64_tpoff (info
, relocation
),
4669 if (htab
->elf
.sgot
== NULL
)
4674 off
= h
->got
.offset
;
4675 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4679 if (local_got_offsets
== NULL
)
4682 off
= local_got_offsets
[r_symndx
];
4683 offplt
= local_tlsdesc_gotents
[r_symndx
];
4690 Elf_Internal_Rela outrel
;
4694 if (htab
->elf
.srelgot
== NULL
)
4697 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4699 if (GOT_TLS_GDESC_P (tls_type
))
4701 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4702 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4703 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4704 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4705 + htab
->elf
.sgotplt
->output_offset
4707 + htab
->sgotplt_jump_table_size
);
4708 sreloc
= htab
->elf
.srelplt
;
4710 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4712 outrel
.r_addend
= 0;
4713 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4716 sreloc
= htab
->elf
.srelgot
;
4718 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4719 + htab
->elf
.sgot
->output_offset
+ off
);
4721 if (GOT_TLS_GD_P (tls_type
))
4722 dr_type
= R_X86_64_DTPMOD64
;
4723 else if (GOT_TLS_GDESC_P (tls_type
))
4726 dr_type
= R_X86_64_TPOFF64
;
4728 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4729 outrel
.r_addend
= 0;
4730 if ((dr_type
== R_X86_64_TPOFF64
4731 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4732 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4733 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4735 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4737 if (GOT_TLS_GD_P (tls_type
))
4741 BFD_ASSERT (! unresolved_reloc
);
4742 bfd_put_64 (output_bfd
,
4743 relocation
- elf_x86_64_dtpoff_base (info
),
4744 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4748 bfd_put_64 (output_bfd
, 0,
4749 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4750 outrel
.r_info
= htab
->r_info (indx
,
4752 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4753 elf_append_rela (output_bfd
, sreloc
,
4762 local_got_offsets
[r_symndx
] |= 1;
4765 if (off
>= (bfd_vma
) -2
4766 && ! GOT_TLS_GDESC_P (tls_type
))
4768 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4770 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4771 || r_type
== R_X86_64_TLSDESC_CALL
)
4772 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4773 + htab
->elf
.sgotplt
->output_offset
4774 + offplt
+ htab
->sgotplt_jump_table_size
;
4776 relocation
= htab
->elf
.sgot
->output_section
->vma
4777 + htab
->elf
.sgot
->output_offset
+ off
;
4778 unresolved_reloc
= FALSE
;
4782 bfd_vma roff
= rel
->r_offset
;
4784 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4786 /* GD->IE transition. For 64bit, change
4787 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4788 .word 0x6666; rex64; call __tls_get_addr@plt
4791 addq foo@gottpoff(%rip), %rax
4793 leaq foo@tlsgd(%rip), %rdi
4794 .word 0x6666; rex64; call __tls_get_addr@plt
4797 addq foo@gottpoff(%rip), %rax
4798 For largepic, change:
4799 leaq foo@tlsgd(%rip), %rdi
4800 movabsq $__tls_get_addr@pltoff, %rax
4805 addq foo@gottpoff(%rax), %rax
4806 nopw 0x0(%rax,%rax,1) */
4808 if (ABI_64_P (output_bfd
)
4809 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4811 memcpy (contents
+ roff
- 3,
4812 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4813 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4816 else if (ABI_64_P (output_bfd
))
4817 memcpy (contents
+ roff
- 4,
4818 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4821 memcpy (contents
+ roff
- 3,
4822 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4825 relocation
= (htab
->elf
.sgot
->output_section
->vma
4826 + htab
->elf
.sgot
->output_offset
+ off
4829 - input_section
->output_section
->vma
4830 - input_section
->output_offset
4832 bfd_put_32 (output_bfd
, relocation
,
4833 contents
+ roff
+ 8 + largepic
);
4834 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4838 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4840 /* GDesc -> IE transition.
4841 It's originally something like:
4842 leaq x@tlsdesc(%rip), %rax
4845 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4847 /* Now modify the instruction as appropriate. To
4848 turn a leaq into a movq in the form we use it, it
4849 suffices to change the second byte from 0x8d to
4851 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4853 bfd_put_32 (output_bfd
,
4854 htab
->elf
.sgot
->output_section
->vma
4855 + htab
->elf
.sgot
->output_offset
+ off
4857 - input_section
->output_section
->vma
4858 - input_section
->output_offset
4863 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4865 /* GDesc -> IE transition.
4872 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4873 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4881 case R_X86_64_TLSLD
:
4882 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4883 input_section
, contents
,
4884 symtab_hdr
, sym_hashes
,
4885 &r_type
, GOT_UNKNOWN
,
4886 rel
, relend
, h
, r_symndx
))
4889 if (r_type
!= R_X86_64_TLSLD
)
4891 /* LD->LE transition:
4892 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4893 For 64bit, we change it into:
4894 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4895 For 32bit, we change it into:
4896 nopl 0x0(%rax); movl %fs:0, %eax.
4897 For largepic, change:
4898 leaq foo@tlsgd(%rip), %rdi
4899 movabsq $__tls_get_addr@pltoff, %rax
4903 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4906 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4907 if (ABI_64_P (output_bfd
)
4908 && contents
[rel
->r_offset
+ 5] == (bfd_byte
) '\xb8')
4909 memcpy (contents
+ rel
->r_offset
- 3,
4910 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4911 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4912 else if (ABI_64_P (output_bfd
))
4913 memcpy (contents
+ rel
->r_offset
- 3,
4914 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4916 memcpy (contents
+ rel
->r_offset
- 3,
4917 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4918 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4923 if (htab
->elf
.sgot
== NULL
)
4926 off
= htab
->tls_ld_got
.offset
;
4931 Elf_Internal_Rela outrel
;
4933 if (htab
->elf
.srelgot
== NULL
)
4936 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4937 + htab
->elf
.sgot
->output_offset
+ off
);
4939 bfd_put_64 (output_bfd
, 0,
4940 htab
->elf
.sgot
->contents
+ off
);
4941 bfd_put_64 (output_bfd
, 0,
4942 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4943 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4944 outrel
.r_addend
= 0;
4945 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4947 htab
->tls_ld_got
.offset
|= 1;
4949 relocation
= htab
->elf
.sgot
->output_section
->vma
4950 + htab
->elf
.sgot
->output_offset
+ off
;
4951 unresolved_reloc
= FALSE
;
4954 case R_X86_64_DTPOFF32
:
4955 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4956 relocation
-= elf_x86_64_dtpoff_base (info
);
4958 relocation
= elf_x86_64_tpoff (info
, relocation
);
4961 case R_X86_64_TPOFF32
:
4962 case R_X86_64_TPOFF64
:
4963 BFD_ASSERT (info
->executable
);
4964 relocation
= elf_x86_64_tpoff (info
, relocation
);
4967 case R_X86_64_DTPOFF64
:
4968 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4969 relocation
-= elf_x86_64_dtpoff_base (info
);
4976 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4977 because such sections are not SEC_ALLOC and thus ld.so will
4978 not process them. */
4979 if (unresolved_reloc
4980 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4982 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4983 rel
->r_offset
) != (bfd_vma
) -1)
4985 (*_bfd_error_handler
)
4986 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4989 (long) rel
->r_offset
,
4991 h
->root
.root
.string
);
4996 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4997 contents
, rel
->r_offset
,
4998 relocation
, rel
->r_addend
);
5000 check_relocation_error
:
5001 if (r
!= bfd_reloc_ok
)
5006 name
= h
->root
.root
.string
;
5009 name
= bfd_elf_string_from_elf_section (input_bfd
,
5010 symtab_hdr
->sh_link
,
5015 name
= bfd_section_name (input_bfd
, sec
);
5018 if (r
== bfd_reloc_overflow
)
5020 if (! ((*info
->callbacks
->reloc_overflow
)
5021 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5022 (bfd_vma
) 0, input_bfd
, input_section
,
5028 (*_bfd_error_handler
)
5029 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5030 input_bfd
, input_section
,
5031 (long) rel
->r_offset
, name
, (int) r
);
5040 /* Finish up dynamic symbol handling. We set the contents of various
5041 dynamic sections here. */
5044 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
5045 struct bfd_link_info
*info
,
5046 struct elf_link_hash_entry
*h
,
5047 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
5049 struct elf_x86_64_link_hash_table
*htab
;
5050 const struct elf_x86_64_backend_data
*abed
;
5051 bfd_boolean use_plt_bnd
;
5052 struct elf_x86_64_link_hash_entry
*eh
;
5054 htab
= elf_x86_64_hash_table (info
);
5058 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5059 section only if there is .plt section. */
5060 use_plt_bnd
= htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
;
5062 ? &elf_x86_64_bnd_arch_bed
5063 : get_elf_x86_64_backend_data (output_bfd
));
5065 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
5067 if (h
->plt
.offset
!= (bfd_vma
) -1)
5070 bfd_vma got_offset
, plt_offset
, plt_plt_offset
, plt_got_offset
;
5071 bfd_vma plt_plt_insn_end
, plt_got_insn_size
;
5072 Elf_Internal_Rela rela
;
5074 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
5075 const struct elf_backend_data
*bed
;
5076 bfd_vma plt_got_pcrel_offset
;
5078 /* When building a static executable, use .iplt, .igot.plt and
5079 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5080 if (htab
->elf
.splt
!= NULL
)
5082 plt
= htab
->elf
.splt
;
5083 gotplt
= htab
->elf
.sgotplt
;
5084 relplt
= htab
->elf
.srelplt
;
5088 plt
= htab
->elf
.iplt
;
5089 gotplt
= htab
->elf
.igotplt
;
5090 relplt
= htab
->elf
.irelplt
;
5093 /* This symbol has an entry in the procedure linkage table. Set
5095 if ((h
->dynindx
== -1
5096 && !((h
->forced_local
|| info
->executable
)
5098 && h
->type
== STT_GNU_IFUNC
))
5104 /* Get the index in the procedure linkage table which
5105 corresponds to this symbol. This is the index of this symbol
5106 in all the symbols for which we are making plt entries. The
5107 first entry in the procedure linkage table is reserved.
5109 Get the offset into the .got table of the entry that
5110 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5111 bytes. The first three are reserved for the dynamic linker.
5113 For static executables, we don't reserve anything. */
5115 if (plt
== htab
->elf
.splt
)
5117 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
5118 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
5122 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
5123 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
5126 plt_plt_insn_end
= abed
->plt_plt_insn_end
;
5127 plt_plt_offset
= abed
->plt_plt_offset
;
5128 plt_got_insn_size
= abed
->plt_got_insn_size
;
5129 plt_got_offset
= abed
->plt_got_offset
;
5132 /* Use the second PLT with BND relocations. */
5133 const bfd_byte
*plt_entry
, *plt2_entry
;
5135 if (eh
->has_bnd_reloc
)
5137 plt_entry
= elf_x86_64_bnd_plt_entry
;
5138 plt2_entry
= elf_x86_64_bnd_plt2_entry
;
5142 plt_entry
= elf_x86_64_legacy_plt_entry
;
5143 plt2_entry
= elf_x86_64_legacy_plt2_entry
;
5145 /* Subtract 1 since there is no BND prefix. */
5146 plt_plt_insn_end
-= 1;
5147 plt_plt_offset
-= 1;
5148 plt_got_insn_size
-= 1;
5149 plt_got_offset
-= 1;
5152 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry
)
5153 == sizeof (elf_x86_64_legacy_plt_entry
));
5155 /* Fill in the entry in the procedure linkage table. */
5156 memcpy (plt
->contents
+ h
->plt
.offset
,
5157 plt_entry
, sizeof (elf_x86_64_legacy_plt_entry
));
5158 /* Fill in the entry in the second PLT. */
5159 memcpy (htab
->plt_bnd
->contents
+ eh
->plt_bnd
.offset
,
5160 plt2_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5162 resolved_plt
= htab
->plt_bnd
;
5163 plt_offset
= eh
->plt_bnd
.offset
;
5167 /* Fill in the entry in the procedure linkage table. */
5168 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
5169 abed
->plt_entry_size
);
5172 plt_offset
= h
->plt
.offset
;
5175 /* Insert the relocation positions of the plt section. */
5177 /* Put offset the PC-relative instruction referring to the GOT entry,
5178 subtracting the size of that instruction. */
5179 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
5180 + gotplt
->output_offset
5182 - resolved_plt
->output_section
->vma
5183 - resolved_plt
->output_offset
5185 - plt_got_insn_size
);
5187 /* Check PC-relative offset overflow in PLT entry. */
5188 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
5189 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5190 output_bfd
, h
->root
.root
.string
);
5192 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
5193 resolved_plt
->contents
+ plt_offset
+ plt_got_offset
);
5195 /* Fill in the entry in the global offset table, initially this
5196 points to the second part of the PLT entry. */
5197 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5198 + plt
->output_offset
5199 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
5200 gotplt
->contents
+ got_offset
);
5202 /* Fill in the entry in the .rela.plt section. */
5203 rela
.r_offset
= (gotplt
->output_section
->vma
5204 + gotplt
->output_offset
5206 if (h
->dynindx
== -1
5207 || ((info
->executable
5208 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5210 && h
->type
== STT_GNU_IFUNC
))
5212 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5213 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5214 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
5215 rela
.r_addend
= (h
->root
.u
.def
.value
5216 + h
->root
.u
.def
.section
->output_section
->vma
5217 + h
->root
.u
.def
.section
->output_offset
);
5218 /* R_X86_64_IRELATIVE comes last. */
5219 plt_index
= htab
->next_irelative_index
--;
5223 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
5225 plt_index
= htab
->next_jump_slot_index
++;
5228 /* Don't fill PLT entry for static executables. */
5229 if (plt
== htab
->elf
.splt
)
5231 bfd_vma plt0_offset
= h
->plt
.offset
+ plt_plt_insn_end
;
5233 /* Put relocation index. */
5234 bfd_put_32 (output_bfd
, plt_index
,
5235 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
5237 /* Put offset for jmp .PLT0 and check for overflow. We don't
5238 check relocation index for overflow since branch displacement
5239 will overflow first. */
5240 if (plt0_offset
> 0x80000000)
5241 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5242 output_bfd
, h
->root
.root
.string
);
5243 bfd_put_32 (output_bfd
, - plt0_offset
,
5244 plt
->contents
+ h
->plt
.offset
+ plt_plt_offset
);
5247 bed
= get_elf_backend_data (output_bfd
);
5248 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
5249 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
5251 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5253 bfd_vma got_offset
, plt_offset
, plt_got_offset
, plt_got_insn_size
;
5254 asection
*plt
, *got
;
5255 bfd_boolean got_after_plt
;
5256 int32_t got_pcrel_offset
;
5257 const bfd_byte
*got_plt_entry
;
5259 /* Set the entry in the GOT procedure linkage table. */
5260 plt
= htab
->plt_got
;
5261 got
= htab
->elf
.sgot
;
5262 got_offset
= h
->got
.offset
;
5264 if (got_offset
== (bfd_vma
) -1
5265 || h
->type
== STT_GNU_IFUNC
5270 /* Use the second PLT entry template for the GOT PLT since they
5271 are the identical. */
5272 plt_got_insn_size
= elf_x86_64_bnd_arch_bed
.plt_got_insn_size
;
5273 plt_got_offset
= elf_x86_64_bnd_arch_bed
.plt_got_offset
;
5274 if (eh
->has_bnd_reloc
)
5275 got_plt_entry
= elf_x86_64_bnd_plt2_entry
;
5278 got_plt_entry
= elf_x86_64_legacy_plt2_entry
;
5280 /* Subtract 1 since there is no BND prefix. */
5281 plt_got_insn_size
-= 1;
5282 plt_got_offset
-= 1;
5285 /* Fill in the entry in the GOT procedure linkage table. */
5286 plt_offset
= eh
->plt_got
.offset
;
5287 memcpy (plt
->contents
+ plt_offset
,
5288 got_plt_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5290 /* Put offset the PC-relative instruction referring to the GOT
5291 entry, subtracting the size of that instruction. */
5292 got_pcrel_offset
= (got
->output_section
->vma
5293 + got
->output_offset
5295 - plt
->output_section
->vma
5296 - plt
->output_offset
5298 - plt_got_insn_size
);
5300 /* Check PC-relative offset overflow in GOT PLT entry. */
5301 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
5302 if ((got_after_plt
&& got_pcrel_offset
< 0)
5303 || (!got_after_plt
&& got_pcrel_offset
> 0))
5304 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5305 output_bfd
, h
->root
.root
.string
);
5307 bfd_put_32 (output_bfd
, got_pcrel_offset
,
5308 plt
->contents
+ plt_offset
+ plt_got_offset
);
5312 && (h
->plt
.offset
!= (bfd_vma
) -1
5313 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5315 /* Mark the symbol as undefined, rather than as defined in
5316 the .plt section. Leave the value if there were any
5317 relocations where pointer equality matters (this is a clue
5318 for the dynamic linker, to make function pointer
5319 comparisons work between an application and shared
5320 library), otherwise set it to zero. If a function is only
5321 called from a binary, there is no need to slow down
5322 shared libraries because of that. */
5323 sym
->st_shndx
= SHN_UNDEF
;
5324 if (!h
->pointer_equality_needed
)
5328 if (h
->got
.offset
!= (bfd_vma
) -1
5329 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
5330 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
5332 Elf_Internal_Rela rela
;
5334 /* This symbol has an entry in the global offset table. Set it
5336 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5339 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5340 + htab
->elf
.sgot
->output_offset
5341 + (h
->got
.offset
&~ (bfd_vma
) 1));
5343 /* If this is a static link, or it is a -Bsymbolic link and the
5344 symbol is defined locally or was forced to be local because
5345 of a version file, we just want to emit a RELATIVE reloc.
5346 The entry in the global offset table will already have been
5347 initialized in the relocate_section function. */
5349 && h
->type
== STT_GNU_IFUNC
)
5353 /* Generate R_X86_64_GLOB_DAT. */
5360 if (!h
->pointer_equality_needed
)
5363 /* For non-shared object, we can't use .got.plt, which
5364 contains the real function addres if we need pointer
5365 equality. We load the GOT entry with the PLT entry. */
5366 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5367 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5368 + plt
->output_offset
5370 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5374 else if (info
->shared
5375 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5377 if (!h
->def_regular
)
5379 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5380 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
5381 rela
.r_addend
= (h
->root
.u
.def
.value
5382 + h
->root
.u
.def
.section
->output_section
->vma
5383 + h
->root
.u
.def
.section
->output_offset
);
5387 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5389 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5390 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5391 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
5395 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
5400 Elf_Internal_Rela rela
;
5402 /* This symbol needs a copy reloc. Set it up. */
5404 if (h
->dynindx
== -1
5405 || (h
->root
.type
!= bfd_link_hash_defined
5406 && h
->root
.type
!= bfd_link_hash_defweak
)
5407 || htab
->srelbss
== NULL
)
5410 rela
.r_offset
= (h
->root
.u
.def
.value
5411 + h
->root
.u
.def
.section
->output_section
->vma
5412 + h
->root
.u
.def
.section
->output_offset
);
5413 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
5415 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
5421 /* Finish up local dynamic symbol handling. We set the contents of
5422 various dynamic sections here. */
5425 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
5427 struct elf_link_hash_entry
*h
5428 = (struct elf_link_hash_entry
*) *slot
;
5429 struct bfd_link_info
*info
5430 = (struct bfd_link_info
*) inf
;
5432 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
5436 /* Used to decide how to sort relocs in an optimal manner for the
5437 dynamic linker, before writing them out. */
5439 static enum elf_reloc_type_class
5440 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5441 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5442 const Elf_Internal_Rela
*rela
)
5444 switch ((int) ELF32_R_TYPE (rela
->r_info
))
5446 case R_X86_64_RELATIVE
:
5447 case R_X86_64_RELATIVE64
:
5448 return reloc_class_relative
;
5449 case R_X86_64_JUMP_SLOT
:
5450 return reloc_class_plt
;
5452 return reloc_class_copy
;
5454 return reloc_class_normal
;
5458 /* Finish up the dynamic sections. */
5461 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
5462 struct bfd_link_info
*info
)
5464 struct elf_x86_64_link_hash_table
*htab
;
5467 const struct elf_x86_64_backend_data
*abed
;
5469 htab
= elf_x86_64_hash_table (info
);
5473 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5474 section only if there is .plt section. */
5475 abed
= (htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
5476 ? &elf_x86_64_bnd_arch_bed
5477 : get_elf_x86_64_backend_data (output_bfd
));
5479 dynobj
= htab
->elf
.dynobj
;
5480 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5482 if (htab
->elf
.dynamic_sections_created
)
5484 bfd_byte
*dyncon
, *dynconend
;
5485 const struct elf_backend_data
*bed
;
5486 bfd_size_type sizeof_dyn
;
5488 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5491 bed
= get_elf_backend_data (dynobj
);
5492 sizeof_dyn
= bed
->s
->sizeof_dyn
;
5493 dyncon
= sdyn
->contents
;
5494 dynconend
= sdyn
->contents
+ sdyn
->size
;
5495 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
5497 Elf_Internal_Dyn dyn
;
5500 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
5508 s
= htab
->elf
.sgotplt
;
5509 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5513 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
5517 s
= htab
->elf
.srelplt
->output_section
;
5518 dyn
.d_un
.d_val
= s
->size
;
5522 /* The procedure linkage table relocs (DT_JMPREL) should
5523 not be included in the overall relocs (DT_RELA).
5524 Therefore, we override the DT_RELASZ entry here to
5525 make it not include the JMPREL relocs. Since the
5526 linker script arranges for .rela.plt to follow all
5527 other relocation sections, we don't have to worry
5528 about changing the DT_RELA entry. */
5529 if (htab
->elf
.srelplt
!= NULL
)
5531 s
= htab
->elf
.srelplt
->output_section
;
5532 dyn
.d_un
.d_val
-= s
->size
;
5536 case DT_TLSDESC_PLT
:
5538 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5539 + htab
->tlsdesc_plt
;
5542 case DT_TLSDESC_GOT
:
5544 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5545 + htab
->tlsdesc_got
;
5549 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
5552 /* Fill in the special first entry in the procedure linkage table. */
5553 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5555 /* Fill in the first entry in the procedure linkage table. */
5556 memcpy (htab
->elf
.splt
->contents
,
5557 abed
->plt0_entry
, abed
->plt_entry_size
);
5558 /* Add offset for pushq GOT+8(%rip), since the instruction
5559 uses 6 bytes subtract this value. */
5560 bfd_put_32 (output_bfd
,
5561 (htab
->elf
.sgotplt
->output_section
->vma
5562 + htab
->elf
.sgotplt
->output_offset
5564 - htab
->elf
.splt
->output_section
->vma
5565 - htab
->elf
.splt
->output_offset
5567 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
5568 /* Add offset for the PC-relative instruction accessing GOT+16,
5569 subtracting the offset to the end of that instruction. */
5570 bfd_put_32 (output_bfd
,
5571 (htab
->elf
.sgotplt
->output_section
->vma
5572 + htab
->elf
.sgotplt
->output_offset
5574 - htab
->elf
.splt
->output_section
->vma
5575 - htab
->elf
.splt
->output_offset
5576 - abed
->plt0_got2_insn_end
),
5577 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
5579 elf_section_data (htab
->elf
.splt
->output_section
)
5580 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
5582 if (htab
->tlsdesc_plt
)
5584 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5585 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
5587 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
5588 abed
->plt0_entry
, abed
->plt_entry_size
);
5590 /* Add offset for pushq GOT+8(%rip), since the
5591 instruction uses 6 bytes subtract this value. */
5592 bfd_put_32 (output_bfd
,
5593 (htab
->elf
.sgotplt
->output_section
->vma
5594 + htab
->elf
.sgotplt
->output_offset
5596 - htab
->elf
.splt
->output_section
->vma
5597 - htab
->elf
.splt
->output_offset
5600 htab
->elf
.splt
->contents
5601 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
5602 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5603 where TGD stands for htab->tlsdesc_got, subtracting the offset
5604 to the end of that instruction. */
5605 bfd_put_32 (output_bfd
,
5606 (htab
->elf
.sgot
->output_section
->vma
5607 + htab
->elf
.sgot
->output_offset
5609 - htab
->elf
.splt
->output_section
->vma
5610 - htab
->elf
.splt
->output_offset
5612 - abed
->plt0_got2_insn_end
),
5613 htab
->elf
.splt
->contents
5614 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
5619 if (htab
->plt_bnd
!= NULL
)
5620 elf_section_data (htab
->plt_bnd
->output_section
)
5621 ->this_hdr
.sh_entsize
= sizeof (elf_x86_64_bnd_plt2_entry
);
5623 if (htab
->elf
.sgotplt
)
5625 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5627 (*_bfd_error_handler
)
5628 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5632 /* Fill in the first three entries in the global offset table. */
5633 if (htab
->elf
.sgotplt
->size
> 0)
5635 /* Set the first entry in the global offset table to the address of
5636 the dynamic section. */
5638 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
5640 bfd_put_64 (output_bfd
,
5641 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5642 htab
->elf
.sgotplt
->contents
);
5643 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5644 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
5645 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
5648 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
5652 /* Adjust .eh_frame for .plt section. */
5653 if (htab
->plt_eh_frame
!= NULL
5654 && htab
->plt_eh_frame
->contents
!= NULL
)
5656 if (htab
->elf
.splt
!= NULL
5657 && htab
->elf
.splt
->size
!= 0
5658 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5659 && htab
->elf
.splt
->output_section
!= NULL
5660 && htab
->plt_eh_frame
->output_section
!= NULL
)
5662 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5663 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5664 + htab
->plt_eh_frame
->output_offset
5665 + PLT_FDE_START_OFFSET
;
5666 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5667 htab
->plt_eh_frame
->contents
5668 + PLT_FDE_START_OFFSET
);
5670 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5672 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5674 htab
->plt_eh_frame
->contents
))
5679 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5680 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
5683 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5684 htab_traverse (htab
->loc_hash_table
,
5685 elf_x86_64_finish_local_dynamic_symbol
,
5691 /* Return an array of PLT entry symbol values. */
5694 elf_x86_64_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5697 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5700 bfd_vma
*plt_sym_val
;
5702 bfd_byte
*plt_contents
;
5703 const struct elf_x86_64_backend_data
*bed
;
5704 Elf_Internal_Shdr
*hdr
;
5707 /* Get the .plt section contents. PLT passed down may point to the
5708 .plt.bnd section. Make sure that PLT always points to the .plt
5710 plt_bnd
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5715 plt
= bfd_get_section_by_name (abfd
, ".plt");
5718 bed
= &elf_x86_64_bnd_arch_bed
;
5721 bed
= get_elf_x86_64_backend_data (abfd
);
5723 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5724 if (plt_contents
== NULL
)
5726 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5727 plt_contents
, 0, plt
->size
))
5730 free (plt_contents
);
5734 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5735 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5738 hdr
= &elf_section_data (relplt
)->this_hdr
;
5739 count
= relplt
->size
/ hdr
->sh_entsize
;
5741 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5742 if (plt_sym_val
== NULL
)
5745 for (i
= 0; i
< count
; i
++)
5746 plt_sym_val
[i
] = -1;
5748 plt_offset
= bed
->plt_entry_size
;
5749 p
= relplt
->relocation
;
5750 for (i
= 0; i
< count
; i
++, p
++)
5754 /* Skip unknown relocation. */
5755 if (p
->howto
== NULL
)
5758 if (p
->howto
->type
!= R_X86_64_JUMP_SLOT
5759 && p
->howto
->type
!= R_X86_64_IRELATIVE
)
5762 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5763 + bed
->plt_reloc_offset
));
5764 if (reloc_index
>= count
)
5768 /* This is the index in .plt section. */
5769 long plt_index
= plt_offset
/ bed
->plt_entry_size
;
5770 /* Store VMA + the offset in .plt.bnd section. */
5771 plt_sym_val
[reloc_index
] =
5773 + (plt_index
- 1) * sizeof (elf_x86_64_legacy_plt2_entry
));
5776 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5777 plt_offset
+= bed
->plt_entry_size
;
5779 /* PR binutils/18437: Skip extra relocations in the .rela.plt
5781 if (plt_offset
>= plt
->size
)
5785 free (plt_contents
);
5790 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5794 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
5801 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
5802 as PLT if it exists. */
5803 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5805 plt
= bfd_get_section_by_name (abfd
, ".plt");
5806 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5807 dynsymcount
, dynsyms
, ret
,
5809 elf_x86_64_get_plt_sym_val
);
5812 /* Handle an x86-64 specific section when reading an object file. This
5813 is called when elfcode.h finds a section with an unknown type. */
5816 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
5817 const char *name
, int shindex
)
5819 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
5822 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
5828 /* Hook called by the linker routine which adds symbols from an object
5829 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5833 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5834 struct bfd_link_info
*info
,
5835 Elf_Internal_Sym
*sym
,
5836 const char **namep ATTRIBUTE_UNUSED
,
5837 flagword
*flagsp ATTRIBUTE_UNUSED
,
5843 switch (sym
->st_shndx
)
5845 case SHN_X86_64_LCOMMON
:
5846 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5849 lcomm
= bfd_make_section_with_flags (abfd
,
5853 | SEC_LINKER_CREATED
));
5856 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5859 *valp
= sym
->st_size
;
5863 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5864 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5865 && (abfd
->flags
& DYNAMIC
) == 0
5866 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5867 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5873 /* Given a BFD section, try to locate the corresponding ELF section
5877 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5878 asection
*sec
, int *index_return
)
5880 if (sec
== &_bfd_elf_large_com_section
)
5882 *index_return
= SHN_X86_64_LCOMMON
;
5888 /* Process a symbol. */
5891 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5894 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5896 switch (elfsym
->internal_elf_sym
.st_shndx
)
5898 case SHN_X86_64_LCOMMON
:
5899 asym
->section
= &_bfd_elf_large_com_section
;
5900 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5901 /* Common symbol doesn't set BSF_GLOBAL. */
5902 asym
->flags
&= ~BSF_GLOBAL
;
5908 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5910 return (sym
->st_shndx
== SHN_COMMON
5911 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5915 elf_x86_64_common_section_index (asection
*sec
)
5917 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5920 return SHN_X86_64_LCOMMON
;
5924 elf_x86_64_common_section (asection
*sec
)
5926 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5927 return bfd_com_section_ptr
;
5929 return &_bfd_elf_large_com_section
;
5933 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5934 const Elf_Internal_Sym
*sym
,
5939 const asection
*oldsec
)
5941 /* A normal common symbol and a large common symbol result in a
5942 normal common symbol. We turn the large common symbol into a
5945 && h
->root
.type
== bfd_link_hash_common
5947 && bfd_is_com_section (*psec
)
5950 if (sym
->st_shndx
== SHN_COMMON
5951 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5953 h
->root
.u
.c
.p
->section
5954 = bfd_make_section_old_way (oldbfd
, "COMMON");
5955 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5957 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5958 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5959 *psec
= bfd_com_section_ptr
;
5966 elf_x86_64_additional_program_headers (bfd
*abfd
,
5967 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5972 /* Check to see if we need a large readonly segment. */
5973 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5974 if (s
&& (s
->flags
& SEC_LOAD
))
5977 /* Check to see if we need a large data segment. Since .lbss sections
5978 is placed right after the .bss section, there should be no need for
5979 a large data segment just because of .lbss. */
5980 s
= bfd_get_section_by_name (abfd
, ".ldata");
5981 if (s
&& (s
->flags
& SEC_LOAD
))
5987 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5990 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5992 if (h
->plt
.offset
!= (bfd_vma
) -1
5994 && !h
->pointer_equality_needed
)
5997 return _bfd_elf_hash_symbol (h
);
6000 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
6003 elf_x86_64_relocs_compatible (const bfd_target
*input
,
6004 const bfd_target
*output
)
6006 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
6007 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
6008 && _bfd_elf_relocs_compatible (input
, output
));
6011 static const struct bfd_elf_special_section
6012 elf_x86_64_special_sections
[]=
6014 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6015 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
6016 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
6017 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6018 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6019 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
6020 { NULL
, 0, 0, 0, 0 }
6023 #define TARGET_LITTLE_SYM x86_64_elf64_vec
6024 #define TARGET_LITTLE_NAME "elf64-x86-64"
6025 #define ELF_ARCH bfd_arch_i386
6026 #define ELF_TARGET_ID X86_64_ELF_DATA
6027 #define ELF_MACHINE_CODE EM_X86_64
6028 #define ELF_MAXPAGESIZE 0x200000
6029 #define ELF_MINPAGESIZE 0x1000
6030 #define ELF_COMMONPAGESIZE 0x1000
6032 #define elf_backend_can_gc_sections 1
6033 #define elf_backend_can_refcount 1
6034 #define elf_backend_want_got_plt 1
6035 #define elf_backend_plt_readonly 1
6036 #define elf_backend_want_plt_sym 0
6037 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
6038 #define elf_backend_rela_normal 1
6039 #define elf_backend_plt_alignment 4
6040 #define elf_backend_extern_protected_data 1
6042 #define elf_info_to_howto elf_x86_64_info_to_howto
6044 #define bfd_elf64_bfd_link_hash_table_create \
6045 elf_x86_64_link_hash_table_create
6046 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
6047 #define bfd_elf64_bfd_reloc_name_lookup \
6048 elf_x86_64_reloc_name_lookup
6050 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
6051 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
6052 #define elf_backend_check_relocs elf_x86_64_check_relocs
6053 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
6054 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
6055 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6056 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6057 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
6058 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
6059 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6060 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
6062 #define elf_backend_write_core_note elf_x86_64_write_core_note
6064 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6065 #define elf_backend_relocate_section elf_x86_64_relocate_section
6066 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6067 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
6068 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
6069 #define elf_backend_object_p elf64_x86_64_elf_object_p
6070 #define bfd_elf64_mkobject elf_x86_64_mkobject
6071 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
6073 #define elf_backend_section_from_shdr \
6074 elf_x86_64_section_from_shdr
6076 #define elf_backend_section_from_bfd_section \
6077 elf_x86_64_elf_section_from_bfd_section
6078 #define elf_backend_add_symbol_hook \
6079 elf_x86_64_add_symbol_hook
6080 #define elf_backend_symbol_processing \
6081 elf_x86_64_symbol_processing
6082 #define elf_backend_common_section_index \
6083 elf_x86_64_common_section_index
6084 #define elf_backend_common_section \
6085 elf_x86_64_common_section
6086 #define elf_backend_common_definition \
6087 elf_x86_64_common_definition
6088 #define elf_backend_merge_symbol \
6089 elf_x86_64_merge_symbol
6090 #define elf_backend_special_sections \
6091 elf_x86_64_special_sections
6092 #define elf_backend_additional_program_headers \
6093 elf_x86_64_additional_program_headers
6094 #define elf_backend_hash_symbol \
6095 elf_x86_64_hash_symbol
6097 #include "elf64-target.h"
6099 /* CloudABI support. */
6101 #undef TARGET_LITTLE_SYM
6102 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6103 #undef TARGET_LITTLE_NAME
6104 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6107 #define ELF_OSABI ELFOSABI_CLOUDABI
6110 #define elf64_bed elf64_x86_64_cloudabi_bed
6112 #include "elf64-target.h"
6114 /* FreeBSD support. */
6116 #undef TARGET_LITTLE_SYM
6117 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
6118 #undef TARGET_LITTLE_NAME
6119 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6122 #define ELF_OSABI ELFOSABI_FREEBSD
6125 #define elf64_bed elf64_x86_64_fbsd_bed
6127 #include "elf64-target.h"
6129 /* Solaris 2 support. */
6131 #undef TARGET_LITTLE_SYM
6132 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
6133 #undef TARGET_LITTLE_NAME
6134 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6136 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6137 objects won't be recognized. */
6141 #define elf64_bed elf64_x86_64_sol2_bed
6143 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6145 #undef elf_backend_static_tls_alignment
6146 #define elf_backend_static_tls_alignment 16
6148 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6150 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6152 #undef elf_backend_want_plt_sym
6153 #define elf_backend_want_plt_sym 1
6155 #include "elf64-target.h"
6157 /* Native Client support. */
6160 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
6162 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6163 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
6167 #undef TARGET_LITTLE_SYM
6168 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6169 #undef TARGET_LITTLE_NAME
6170 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6172 #define elf64_bed elf64_x86_64_nacl_bed
6174 #undef ELF_MAXPAGESIZE
6175 #undef ELF_MINPAGESIZE
6176 #undef ELF_COMMONPAGESIZE
6177 #define ELF_MAXPAGESIZE 0x10000
6178 #define ELF_MINPAGESIZE 0x10000
6179 #define ELF_COMMONPAGESIZE 0x10000
6181 /* Restore defaults. */
6183 #undef elf_backend_static_tls_alignment
6184 #undef elf_backend_want_plt_sym
6185 #define elf_backend_want_plt_sym 0
6187 /* NaCl uses substantially different PLT entries for the same effects. */
6189 #undef elf_backend_plt_alignment
6190 #define elf_backend_plt_alignment 5
6191 #define NACL_PLT_ENTRY_SIZE 64
6192 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6194 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
6196 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6197 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6198 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6199 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6200 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6202 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6203 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6205 /* 32 bytes of nop to pad out to the standard size. */
6206 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6207 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6208 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6209 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6210 0x66, /* excess data32 prefix */
6214 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6216 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6217 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6218 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6219 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6221 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6222 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6223 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6225 /* Lazy GOT entries point here (32-byte aligned). */
6226 0x68, /* pushq immediate */
6227 0, 0, 0, 0, /* replaced with index into relocation table. */
6228 0xe9, /* jmp relative */
6229 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6231 /* 22 bytes of nop to pad out to the standard size. */
6232 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6233 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6234 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6237 /* .eh_frame covering the .plt section. */
6239 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
6241 #if (PLT_CIE_LENGTH != 20 \
6242 || PLT_FDE_LENGTH != 36 \
6243 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6244 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6245 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6247 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6248 0, 0, 0, 0, /* CIE ID */
6249 1, /* CIE version */
6250 'z', 'R', 0, /* Augmentation string */
6251 1, /* Code alignment factor */
6252 0x78, /* Data alignment factor */
6253 16, /* Return address column */
6254 1, /* Augmentation size */
6255 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6256 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6257 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6258 DW_CFA_nop
, DW_CFA_nop
,
6260 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6261 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
6262 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6263 0, 0, 0, 0, /* .plt size goes here */
6264 0, /* Augmentation size */
6265 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
6266 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6267 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
6268 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6269 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6270 13, /* Block length */
6271 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
6272 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
6273 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6274 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
6275 DW_CFA_nop
, DW_CFA_nop
6278 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
6280 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
6281 elf_x86_64_nacl_plt_entry
, /* plt_entry */
6282 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6283 2, /* plt0_got1_offset */
6284 9, /* plt0_got2_offset */
6285 13, /* plt0_got2_insn_end */
6286 3, /* plt_got_offset */
6287 33, /* plt_reloc_offset */
6288 38, /* plt_plt_offset */
6289 7, /* plt_got_insn_size */
6290 42, /* plt_plt_insn_end */
6291 32, /* plt_lazy_offset */
6292 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
6293 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
6296 #undef elf_backend_arch_data
6297 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6299 #undef elf_backend_object_p
6300 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6301 #undef elf_backend_modify_segment_map
6302 #define elf_backend_modify_segment_map nacl_modify_segment_map
6303 #undef elf_backend_modify_program_headers
6304 #define elf_backend_modify_program_headers nacl_modify_program_headers
6305 #undef elf_backend_final_write_processing
6306 #define elf_backend_final_write_processing nacl_final_write_processing
6308 #include "elf64-target.h"
6310 /* Native Client x32 support. */
6313 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
6315 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6316 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
6320 #undef TARGET_LITTLE_SYM
6321 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6322 #undef TARGET_LITTLE_NAME
6323 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6325 #define elf32_bed elf32_x86_64_nacl_bed
6327 #define bfd_elf32_bfd_link_hash_table_create \
6328 elf_x86_64_link_hash_table_create
6329 #define bfd_elf32_bfd_reloc_type_lookup \
6330 elf_x86_64_reloc_type_lookup
6331 #define bfd_elf32_bfd_reloc_name_lookup \
6332 elf_x86_64_reloc_name_lookup
6333 #define bfd_elf32_mkobject \
6335 #define bfd_elf32_get_synthetic_symtab \
6336 elf_x86_64_get_synthetic_symtab
6338 #undef elf_backend_object_p
6339 #define elf_backend_object_p \
6340 elf32_x86_64_nacl_elf_object_p
6342 #undef elf_backend_bfd_from_remote_memory
6343 #define elf_backend_bfd_from_remote_memory \
6344 _bfd_elf32_bfd_from_remote_memory
6346 #undef elf_backend_size_info
6347 #define elf_backend_size_info \
6348 _bfd_elf32_size_info
6350 #include "elf32-target.h"
6352 /* Restore defaults. */
6353 #undef elf_backend_object_p
6354 #define elf_backend_object_p elf64_x86_64_elf_object_p
6355 #undef elf_backend_bfd_from_remote_memory
6356 #undef elf_backend_size_info
6357 #undef elf_backend_modify_segment_map
6358 #undef elf_backend_modify_program_headers
6359 #undef elf_backend_final_write_processing
6361 /* Intel L1OM support. */
6364 elf64_l1om_elf_object_p (bfd
*abfd
)
6366 /* Set the right machine number for an L1OM elf64 file. */
6367 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
6371 #undef TARGET_LITTLE_SYM
6372 #define TARGET_LITTLE_SYM l1om_elf64_vec
6373 #undef TARGET_LITTLE_NAME
6374 #define TARGET_LITTLE_NAME "elf64-l1om"
6376 #define ELF_ARCH bfd_arch_l1om
6378 #undef ELF_MACHINE_CODE
6379 #define ELF_MACHINE_CODE EM_L1OM
6384 #define elf64_bed elf64_l1om_bed
6386 #undef elf_backend_object_p
6387 #define elf_backend_object_p elf64_l1om_elf_object_p
6389 /* Restore defaults. */
6390 #undef ELF_MAXPAGESIZE
6391 #undef ELF_MINPAGESIZE
6392 #undef ELF_COMMONPAGESIZE
6393 #define ELF_MAXPAGESIZE 0x200000
6394 #define ELF_MINPAGESIZE 0x1000
6395 #define ELF_COMMONPAGESIZE 0x1000
6396 #undef elf_backend_plt_alignment
6397 #define elf_backend_plt_alignment 4
6398 #undef elf_backend_arch_data
6399 #define elf_backend_arch_data &elf_x86_64_arch_bed
6401 #include "elf64-target.h"
6403 /* FreeBSD L1OM support. */
6405 #undef TARGET_LITTLE_SYM
6406 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6407 #undef TARGET_LITTLE_NAME
6408 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6411 #define ELF_OSABI ELFOSABI_FREEBSD
6414 #define elf64_bed elf64_l1om_fbsd_bed
6416 #include "elf64-target.h"
6418 /* Intel K1OM support. */
6421 elf64_k1om_elf_object_p (bfd
*abfd
)
6423 /* Set the right machine number for an K1OM elf64 file. */
6424 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
6428 #undef TARGET_LITTLE_SYM
6429 #define TARGET_LITTLE_SYM k1om_elf64_vec
6430 #undef TARGET_LITTLE_NAME
6431 #define TARGET_LITTLE_NAME "elf64-k1om"
6433 #define ELF_ARCH bfd_arch_k1om
6435 #undef ELF_MACHINE_CODE
6436 #define ELF_MACHINE_CODE EM_K1OM
6441 #define elf64_bed elf64_k1om_bed
6443 #undef elf_backend_object_p
6444 #define elf_backend_object_p elf64_k1om_elf_object_p
6446 #undef elf_backend_static_tls_alignment
6448 #undef elf_backend_want_plt_sym
6449 #define elf_backend_want_plt_sym 0
6451 #include "elf64-target.h"
6453 /* FreeBSD K1OM support. */
6455 #undef TARGET_LITTLE_SYM
6456 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6457 #undef TARGET_LITTLE_NAME
6458 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6461 #define ELF_OSABI ELFOSABI_FREEBSD
6464 #define elf64_bed elf64_k1om_fbsd_bed
6466 #include "elf64-target.h"
6468 /* 32bit x86-64 support. */
6470 #undef TARGET_LITTLE_SYM
6471 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6472 #undef TARGET_LITTLE_NAME
6473 #define TARGET_LITTLE_NAME "elf32-x86-64"
6477 #define ELF_ARCH bfd_arch_i386
6479 #undef ELF_MACHINE_CODE
6480 #define ELF_MACHINE_CODE EM_X86_64
6484 #undef elf_backend_object_p
6485 #define elf_backend_object_p \
6486 elf32_x86_64_elf_object_p
6488 #undef elf_backend_bfd_from_remote_memory
6489 #define elf_backend_bfd_from_remote_memory \
6490 _bfd_elf32_bfd_from_remote_memory
6492 #undef elf_backend_size_info
6493 #define elf_backend_size_info \
6494 _bfd_elf32_size_info
6496 #include "elf32-target.h"