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
;
2955 unsigned int opcode
;
2957 if (r_type
!= R_X86_64_GOTPCREL
)
2960 roff
= irel
->r_offset
;
2965 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
2967 /* PR ld/18591: Don't convert R_X86_64_GOTPCREL relocation if it
2968 isn't for mov instruction. */
2973 convert_mov_to_lea
= none
;
2975 /* Get the symbol referred to by the reloc. */
2976 if (r_symndx
< symtab_hdr
->sh_info
)
2978 Elf_Internal_Sym
*isym
;
2980 /* Silence older GCC warning. */
2983 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2986 symtype
= ELF_ST_TYPE (isym
->st_info
);
2988 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation and
2989 skip relocation against undefined symbols. */
2990 if (symtype
!= STT_GNU_IFUNC
&& isym
->st_shndx
!= SHN_UNDEF
)
2992 if (isym
->st_shndx
== SHN_ABS
)
2993 tsec
= bfd_abs_section_ptr
;
2994 else if (isym
->st_shndx
== SHN_COMMON
)
2995 tsec
= bfd_com_section_ptr
;
2996 else if (isym
->st_shndx
== SHN_X86_64_LCOMMON
)
2997 tsec
= &_bfd_elf_large_com_section
;
2999 tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3001 toff
= isym
->st_value
;
3002 convert_mov_to_lea
= local
;
3007 indx
= r_symndx
- symtab_hdr
->sh_info
;
3008 h
= elf_sym_hashes (abfd
)[indx
];
3009 BFD_ASSERT (h
!= NULL
);
3011 while (h
->root
.type
== bfd_link_hash_indirect
3012 || h
->root
.type
== bfd_link_hash_warning
)
3013 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3015 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
3016 avoid optimizing _DYNAMIC since ld.so may use its link-time
3019 && h
->type
!= STT_GNU_IFUNC
3020 && h
!= htab
->elf
.hdynamic
3021 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
3023 tsec
= h
->root
.u
.def
.section
;
3024 toff
= h
->root
.u
.def
.value
;
3026 convert_mov_to_lea
= global
;
3030 if (convert_mov_to_lea
== none
)
3033 if (tsec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
3035 /* At this stage in linking, no SEC_MERGE symbol has been
3036 adjusted, so all references to such symbols need to be
3037 passed through _bfd_merged_section_offset. (Later, in
3038 relocate_section, all SEC_MERGE symbols *except* for
3039 section symbols have been adjusted.)
3041 gas may reduce relocations against symbols in SEC_MERGE
3042 sections to a relocation against the section symbol when
3043 the original addend was zero. When the reloc is against
3044 a section symbol we should include the addend in the
3045 offset passed to _bfd_merged_section_offset, since the
3046 location of interest is the original symbol. On the
3047 other hand, an access to "sym+addend" where "sym" is not
3048 a section symbol should not include the addend; Such an
3049 access is presumed to be an offset from "sym"; The
3050 location of interest is just "sym". */
3051 if (symtype
== STT_SECTION
)
3052 toff
+= irel
->r_addend
;
3054 toff
= _bfd_merged_section_offset (abfd
, &tsec
,
3055 elf_section_data (tsec
)->sec_info
,
3058 if (symtype
!= STT_SECTION
)
3059 toff
+= irel
->r_addend
;
3062 toff
+= irel
->r_addend
;
3064 /* Don't convert if R_X86_64_PC32 relocation overflows. */
3065 if (tsec
->output_section
== sec
->output_section
)
3067 if ((toff
- roff
+ 0x80000000) > 0xffffffff)
3075 /* At this point, we don't know the load addresses of TSEC
3076 section nor SEC section. We estimate the distrance between
3079 for (asect
= sec
->output_section
;
3080 asect
!= NULL
&& asect
!= tsec
->output_section
;
3081 asect
= asect
->next
)
3084 for (i
= asect
->output_section
->map_head
.s
;
3088 size
= align_power (size
, i
->alignment_power
);
3093 /* Don't convert R_X86_64_GOTPCREL if TSEC isn't placed after
3098 /* Take PT_GNU_RELRO segment into account by adding
3100 if ((toff
+ size
+ maxpagesize
- roff
+ 0x80000000)
3105 bfd_put_8 (abfd
, 0x8d, contents
+ roff
- 2);
3106 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
3107 changed_contents
= TRUE
;
3108 changed_relocs
= TRUE
;
3110 if (convert_mov_to_lea
== local
)
3112 if (local_got_refcounts
!= NULL
3113 && local_got_refcounts
[r_symndx
] > 0)
3114 local_got_refcounts
[r_symndx
] -= 1;
3118 if (h
->got
.refcount
> 0)
3119 h
->got
.refcount
-= 1;
3123 if (contents
!= NULL
3124 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3126 if (!changed_contents
&& !link_info
->keep_memory
)
3130 /* Cache the section contents for elf_link_input_bfd. */
3131 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3135 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3137 if (!changed_relocs
)
3138 free (internal_relocs
);
3140 elf_section_data (sec
)->relocs
= internal_relocs
;
3146 if (contents
!= NULL
3147 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3149 if (internal_relocs
!= NULL
3150 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3151 free (internal_relocs
);
3155 /* Set the sizes of the dynamic sections. */
3158 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
3159 struct bfd_link_info
*info
)
3161 struct elf_x86_64_link_hash_table
*htab
;
3166 const struct elf_backend_data
*bed
;
3168 htab
= elf_x86_64_hash_table (info
);
3171 bed
= get_elf_backend_data (output_bfd
);
3173 dynobj
= htab
->elf
.dynobj
;
3177 if (htab
->elf
.dynamic_sections_created
)
3179 /* Set the contents of the .interp section to the interpreter. */
3180 if (info
->executable
)
3182 s
= bfd_get_linker_section (dynobj
, ".interp");
3185 s
->size
= htab
->dynamic_interpreter_size
;
3186 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
3190 /* Set up .got offsets for local syms, and space for local dynamic
3192 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3194 bfd_signed_vma
*local_got
;
3195 bfd_signed_vma
*end_local_got
;
3196 char *local_tls_type
;
3197 bfd_vma
*local_tlsdesc_gotent
;
3198 bfd_size_type locsymcount
;
3199 Elf_Internal_Shdr
*symtab_hdr
;
3202 if (! is_x86_64_elf (ibfd
))
3205 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3207 struct elf_dyn_relocs
*p
;
3209 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
3212 for (p
= (struct elf_dyn_relocs
*)
3213 (elf_section_data (s
)->local_dynrel
);
3217 if (!bfd_is_abs_section (p
->sec
)
3218 && bfd_is_abs_section (p
->sec
->output_section
))
3220 /* Input section has been discarded, either because
3221 it is a copy of a linkonce section or due to
3222 linker script /DISCARD/, so we'll be discarding
3225 else if (p
->count
!= 0)
3227 srel
= elf_section_data (p
->sec
)->sreloc
;
3228 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3229 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3230 && (info
->flags
& DF_TEXTREL
) == 0)
3232 info
->flags
|= DF_TEXTREL
;
3233 if ((info
->warn_shared_textrel
&& info
->shared
)
3234 || info
->error_textrel
)
3235 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3236 p
->sec
->owner
, p
->sec
);
3242 local_got
= elf_local_got_refcounts (ibfd
);
3246 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3247 locsymcount
= symtab_hdr
->sh_info
;
3248 end_local_got
= local_got
+ locsymcount
;
3249 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
3250 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
3252 srel
= htab
->elf
.srelgot
;
3253 for (; local_got
< end_local_got
;
3254 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3256 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3259 if (GOT_TLS_GDESC_P (*local_tls_type
))
3261 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3262 - elf_x86_64_compute_jump_table_size (htab
);
3263 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3264 *local_got
= (bfd_vma
) -2;
3266 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3267 || GOT_TLS_GD_P (*local_tls_type
))
3269 *local_got
= s
->size
;
3270 s
->size
+= GOT_ENTRY_SIZE
;
3271 if (GOT_TLS_GD_P (*local_tls_type
))
3272 s
->size
+= GOT_ENTRY_SIZE
;
3275 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3276 || *local_tls_type
== GOT_TLS_IE
)
3278 if (GOT_TLS_GDESC_P (*local_tls_type
))
3280 htab
->elf
.srelplt
->size
3281 += bed
->s
->sizeof_rela
;
3282 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3284 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3285 || GOT_TLS_GD_P (*local_tls_type
))
3286 srel
->size
+= bed
->s
->sizeof_rela
;
3290 *local_got
= (bfd_vma
) -1;
3294 if (htab
->tls_ld_got
.refcount
> 0)
3296 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3298 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
3299 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
3300 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3303 htab
->tls_ld_got
.offset
= -1;
3305 /* Allocate global sym .plt and .got entries, and space for global
3306 sym dynamic relocs. */
3307 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
3310 /* Allocate .plt and .got entries, and space for local symbols. */
3311 htab_traverse (htab
->loc_hash_table
,
3312 elf_x86_64_allocate_local_dynrelocs
,
3315 /* For every jump slot reserved in the sgotplt, reloc_count is
3316 incremented. However, when we reserve space for TLS descriptors,
3317 it's not incremented, so in order to compute the space reserved
3318 for them, it suffices to multiply the reloc count by the jump
3321 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3322 so that R_X86_64_IRELATIVE entries come last. */
3323 if (htab
->elf
.srelplt
)
3325 htab
->sgotplt_jump_table_size
3326 = elf_x86_64_compute_jump_table_size (htab
);
3327 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3329 else if (htab
->elf
.irelplt
)
3330 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3332 if (htab
->tlsdesc_plt
)
3334 /* If we're not using lazy TLS relocations, don't generate the
3335 PLT and GOT entries they require. */
3336 if ((info
->flags
& DF_BIND_NOW
))
3337 htab
->tlsdesc_plt
= 0;
3340 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
3341 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
3342 /* Reserve room for the initial entry.
3343 FIXME: we could probably do away with it in this case. */
3344 if (htab
->elf
.splt
->size
== 0)
3345 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3346 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
3347 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3351 if (htab
->elf
.sgotplt
)
3353 /* Don't allocate .got.plt section if there are no GOT nor PLT
3354 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3355 if ((htab
->elf
.hgot
== NULL
3356 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3357 && (htab
->elf
.sgotplt
->size
3358 == get_elf_backend_data (output_bfd
)->got_header_size
)
3359 && (htab
->elf
.splt
== NULL
3360 || htab
->elf
.splt
->size
== 0)
3361 && (htab
->elf
.sgot
== NULL
3362 || htab
->elf
.sgot
->size
== 0)
3363 && (htab
->elf
.iplt
== NULL
3364 || htab
->elf
.iplt
->size
== 0)
3365 && (htab
->elf
.igotplt
== NULL
3366 || htab
->elf
.igotplt
->size
== 0))
3367 htab
->elf
.sgotplt
->size
= 0;
3370 if (htab
->plt_eh_frame
!= NULL
3371 && htab
->elf
.splt
!= NULL
3372 && htab
->elf
.splt
->size
!= 0
3373 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3374 && _bfd_elf_eh_frame_present (info
))
3376 const struct elf_x86_64_backend_data
*arch_data
3377 = get_elf_x86_64_arch_data (bed
);
3378 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
3381 /* We now have determined the sizes of the various dynamic sections.
3382 Allocate memory for them. */
3384 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3386 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3389 if (s
== htab
->elf
.splt
3390 || s
== htab
->elf
.sgot
3391 || s
== htab
->elf
.sgotplt
3392 || s
== htab
->elf
.iplt
3393 || s
== htab
->elf
.igotplt
3394 || s
== htab
->plt_bnd
3395 || s
== htab
->plt_got
3396 || s
== htab
->plt_eh_frame
3397 || s
== htab
->sdynbss
)
3399 /* Strip this section if we don't need it; see the
3402 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
3404 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3407 /* We use the reloc_count field as a counter if we need
3408 to copy relocs into the output file. */
3409 if (s
!= htab
->elf
.srelplt
)
3414 /* It's not one of our sections, so don't allocate space. */
3420 /* If we don't need this section, strip it from the
3421 output file. This is mostly to handle .rela.bss and
3422 .rela.plt. We must create both sections in
3423 create_dynamic_sections, because they must be created
3424 before the linker maps input sections to output
3425 sections. The linker does that before
3426 adjust_dynamic_symbol is called, and it is that
3427 function which decides whether anything needs to go
3428 into these sections. */
3430 s
->flags
|= SEC_EXCLUDE
;
3434 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3437 /* Allocate memory for the section contents. We use bfd_zalloc
3438 here in case unused entries are not reclaimed before the
3439 section's contents are written out. This should not happen,
3440 but this way if it does, we get a R_X86_64_NONE reloc instead
3442 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3443 if (s
->contents
== NULL
)
3447 if (htab
->plt_eh_frame
!= NULL
3448 && htab
->plt_eh_frame
->contents
!= NULL
)
3450 const struct elf_x86_64_backend_data
*arch_data
3451 = get_elf_x86_64_arch_data (bed
);
3453 memcpy (htab
->plt_eh_frame
->contents
,
3454 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3455 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3456 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3459 if (htab
->elf
.dynamic_sections_created
)
3461 /* Add some entries to the .dynamic section. We fill in the
3462 values later, in elf_x86_64_finish_dynamic_sections, but we
3463 must add the entries now so that we get the correct size for
3464 the .dynamic section. The DT_DEBUG entry is filled in by the
3465 dynamic linker and used by the debugger. */
3466 #define add_dynamic_entry(TAG, VAL) \
3467 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3469 if (info
->executable
)
3471 if (!add_dynamic_entry (DT_DEBUG
, 0))
3475 if (htab
->elf
.splt
->size
!= 0)
3477 /* DT_PLTGOT is used by prelink even if there is no PLT
3479 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3482 if (htab
->elf
.srelplt
->size
!= 0)
3484 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3485 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3486 || !add_dynamic_entry (DT_JMPREL
, 0))
3490 if (htab
->tlsdesc_plt
3491 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3492 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3498 if (!add_dynamic_entry (DT_RELA
, 0)
3499 || !add_dynamic_entry (DT_RELASZ
, 0)
3500 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3503 /* If any dynamic relocs apply to a read-only section,
3504 then we need a DT_TEXTREL entry. */
3505 if ((info
->flags
& DF_TEXTREL
) == 0)
3506 elf_link_hash_traverse (&htab
->elf
,
3507 elf_x86_64_readonly_dynrelocs
,
3510 if ((info
->flags
& DF_TEXTREL
) != 0)
3512 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3517 #undef add_dynamic_entry
3523 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3524 struct bfd_link_info
*info
)
3526 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3530 struct elf_link_hash_entry
*tlsbase
;
3532 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3533 "_TLS_MODULE_BASE_",
3534 FALSE
, FALSE
, FALSE
);
3536 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3538 struct elf_x86_64_link_hash_table
*htab
;
3539 struct bfd_link_hash_entry
*bh
= NULL
;
3540 const struct elf_backend_data
*bed
3541 = get_elf_backend_data (output_bfd
);
3543 htab
= elf_x86_64_hash_table (info
);
3547 if (!(_bfd_generic_link_add_one_symbol
3548 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3549 tls_sec
, 0, NULL
, FALSE
,
3550 bed
->collect
, &bh
)))
3553 htab
->tls_module_base
= bh
;
3555 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3556 tlsbase
->def_regular
= 1;
3557 tlsbase
->other
= STV_HIDDEN
;
3558 tlsbase
->root
.linker_def
= 1;
3559 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3566 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3567 executables. Rather than setting it to the beginning of the TLS
3568 section, we have to set it to the end. This function may be called
3569 multiple times, it is idempotent. */
3572 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3574 struct elf_x86_64_link_hash_table
*htab
;
3575 struct bfd_link_hash_entry
*base
;
3577 if (!info
->executable
)
3580 htab
= elf_x86_64_hash_table (info
);
3584 base
= htab
->tls_module_base
;
3588 base
->u
.def
.value
= htab
->elf
.tls_size
;
3591 /* Return the base VMA address which should be subtracted from real addresses
3592 when resolving @dtpoff relocation.
3593 This is PT_TLS segment p_vaddr. */
3596 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3598 /* If tls_sec is NULL, we should have signalled an error already. */
3599 if (elf_hash_table (info
)->tls_sec
== NULL
)
3601 return elf_hash_table (info
)->tls_sec
->vma
;
3604 /* Return the relocation value for @tpoff relocation
3605 if STT_TLS virtual address is ADDRESS. */
3608 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3610 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3611 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3612 bfd_vma static_tls_size
;
3614 /* If tls_segment is NULL, we should have signalled an error already. */
3615 if (htab
->tls_sec
== NULL
)
3618 /* Consider special static TLS alignment requirements. */
3619 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3620 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3623 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3627 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3629 /* Opcode Instruction
3632 0x0f 0x8x conditional jump */
3634 && (contents
[offset
- 1] == 0xe8
3635 || contents
[offset
- 1] == 0xe9))
3637 && contents
[offset
- 2] == 0x0f
3638 && (contents
[offset
- 1] & 0xf0) == 0x80));
3641 /* Relocate an x86_64 ELF section. */
3644 elf_x86_64_relocate_section (bfd
*output_bfd
,
3645 struct bfd_link_info
*info
,
3647 asection
*input_section
,
3649 Elf_Internal_Rela
*relocs
,
3650 Elf_Internal_Sym
*local_syms
,
3651 asection
**local_sections
)
3653 struct elf_x86_64_link_hash_table
*htab
;
3654 Elf_Internal_Shdr
*symtab_hdr
;
3655 struct elf_link_hash_entry
**sym_hashes
;
3656 bfd_vma
*local_got_offsets
;
3657 bfd_vma
*local_tlsdesc_gotents
;
3658 Elf_Internal_Rela
*rel
;
3659 Elf_Internal_Rela
*relend
;
3660 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3662 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3664 htab
= elf_x86_64_hash_table (info
);
3667 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3668 sym_hashes
= elf_sym_hashes (input_bfd
);
3669 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3670 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3672 elf_x86_64_set_tls_module_base (info
);
3675 relend
= relocs
+ input_section
->reloc_count
;
3676 for (; rel
< relend
; rel
++)
3678 unsigned int r_type
;
3679 reloc_howto_type
*howto
;
3680 unsigned long r_symndx
;
3681 struct elf_link_hash_entry
*h
;
3682 struct elf_x86_64_link_hash_entry
*eh
;
3683 Elf_Internal_Sym
*sym
;
3685 bfd_vma off
, offplt
, plt_offset
;
3687 bfd_boolean unresolved_reloc
;
3688 bfd_reloc_status_type r
;
3690 asection
*base_got
, *resolved_plt
;
3693 r_type
= ELF32_R_TYPE (rel
->r_info
);
3694 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3695 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3698 if (r_type
>= (int) R_X86_64_standard
)
3700 (*_bfd_error_handler
)
3701 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3702 input_bfd
, input_section
, r_type
);
3703 bfd_set_error (bfd_error_bad_value
);
3707 if (r_type
!= (int) R_X86_64_32
3708 || ABI_64_P (output_bfd
))
3709 howto
= x86_64_elf_howto_table
+ r_type
;
3711 howto
= (x86_64_elf_howto_table
3712 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3713 r_symndx
= htab
->r_sym (rel
->r_info
);
3717 unresolved_reloc
= FALSE
;
3718 if (r_symndx
< symtab_hdr
->sh_info
)
3720 sym
= local_syms
+ r_symndx
;
3721 sec
= local_sections
[r_symndx
];
3723 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3725 st_size
= sym
->st_size
;
3727 /* Relocate against local STT_GNU_IFUNC symbol. */
3728 if (!info
->relocatable
3729 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3731 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3736 /* Set STT_GNU_IFUNC symbol value. */
3737 h
->root
.u
.def
.value
= sym
->st_value
;
3738 h
->root
.u
.def
.section
= sec
;
3743 bfd_boolean warned ATTRIBUTE_UNUSED
;
3744 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3746 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3747 r_symndx
, symtab_hdr
, sym_hashes
,
3749 unresolved_reloc
, warned
, ignored
);
3753 if (sec
!= NULL
&& discarded_section (sec
))
3754 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3755 rel
, 1, relend
, howto
, 0, contents
);
3757 if (info
->relocatable
)
3760 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3762 if (r_type
== R_X86_64_64
)
3764 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3765 zero-extend it to 64bit if addend is zero. */
3766 r_type
= R_X86_64_32
;
3767 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3769 else if (r_type
== R_X86_64_SIZE64
)
3771 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3772 zero-extend it to 64bit if addend is zero. */
3773 r_type
= R_X86_64_SIZE32
;
3774 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3778 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3780 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3781 it here if it is defined in a non-shared object. */
3783 && h
->type
== STT_GNU_IFUNC
3789 if ((input_section
->flags
& SEC_ALLOC
) == 0
3790 || h
->plt
.offset
== (bfd_vma
) -1)
3793 /* STT_GNU_IFUNC symbol must go through PLT. */
3794 if (htab
->elf
.splt
!= NULL
)
3796 if (htab
->plt_bnd
!= NULL
)
3798 resolved_plt
= htab
->plt_bnd
;
3799 plt_offset
= eh
->plt_bnd
.offset
;
3803 resolved_plt
= htab
->elf
.splt
;
3804 plt_offset
= h
->plt
.offset
;
3809 resolved_plt
= htab
->elf
.iplt
;
3810 plt_offset
= h
->plt
.offset
;
3813 relocation
= (resolved_plt
->output_section
->vma
3814 + resolved_plt
->output_offset
+ plt_offset
);
3819 if (h
->root
.root
.string
)
3820 name
= h
->root
.root
.string
;
3822 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3824 (*_bfd_error_handler
)
3825 (_("%B: relocation %s against STT_GNU_IFUNC "
3826 "symbol `%s' isn't handled by %s"), input_bfd
,
3827 x86_64_elf_howto_table
[r_type
].name
,
3828 name
, __FUNCTION__
);
3829 bfd_set_error (bfd_error_bad_value
);
3838 if (ABI_64_P (output_bfd
))
3842 if (rel
->r_addend
!= 0)
3844 if (h
->root
.root
.string
)
3845 name
= h
->root
.root
.string
;
3847 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3849 (*_bfd_error_handler
)
3850 (_("%B: relocation %s against STT_GNU_IFUNC "
3851 "symbol `%s' has non-zero addend: %d"),
3852 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3853 name
, rel
->r_addend
);
3854 bfd_set_error (bfd_error_bad_value
);
3858 /* Generate dynamic relcoation only when there is a
3859 non-GOT reference in a shared object. */
3860 if (info
->shared
&& h
->non_got_ref
)
3862 Elf_Internal_Rela outrel
;
3865 /* Need a dynamic relocation to get the real function
3867 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3871 if (outrel
.r_offset
== (bfd_vma
) -1
3872 || outrel
.r_offset
== (bfd_vma
) -2)
3875 outrel
.r_offset
+= (input_section
->output_section
->vma
3876 + input_section
->output_offset
);
3878 if (h
->dynindx
== -1
3880 || info
->executable
)
3882 /* This symbol is resolved locally. */
3883 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3884 outrel
.r_addend
= (h
->root
.u
.def
.value
3885 + h
->root
.u
.def
.section
->output_section
->vma
3886 + h
->root
.u
.def
.section
->output_offset
);
3890 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3891 outrel
.r_addend
= 0;
3894 sreloc
= htab
->elf
.irelifunc
;
3895 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3897 /* If this reloc is against an external symbol, we
3898 do not want to fiddle with the addend. Otherwise,
3899 we need to include the symbol value so that it
3900 becomes an addend for the dynamic reloc. For an
3901 internal symbol, we have updated addend. */
3906 case R_X86_64_PC32_BND
:
3908 case R_X86_64_PLT32
:
3909 case R_X86_64_PLT32_BND
:
3912 case R_X86_64_GOTPCREL
:
3913 case R_X86_64_GOTPCREL64
:
3914 base_got
= htab
->elf
.sgot
;
3915 off
= h
->got
.offset
;
3917 if (base_got
== NULL
)
3920 if (off
== (bfd_vma
) -1)
3922 /* We can't use h->got.offset here to save state, or
3923 even just remember the offset, as finish_dynamic_symbol
3924 would use that as offset into .got. */
3926 if (htab
->elf
.splt
!= NULL
)
3928 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3929 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3930 base_got
= htab
->elf
.sgotplt
;
3934 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3935 off
= plt_index
* GOT_ENTRY_SIZE
;
3936 base_got
= htab
->elf
.igotplt
;
3939 if (h
->dynindx
== -1
3943 /* This references the local defitionion. We must
3944 initialize this entry in the global offset table.
3945 Since the offset must always be a multiple of 8,
3946 we use the least significant bit to record
3947 whether we have initialized it already.
3949 When doing a dynamic link, we create a .rela.got
3950 relocation entry to initialize the value. This
3951 is done in the finish_dynamic_symbol routine. */
3956 bfd_put_64 (output_bfd
, relocation
,
3957 base_got
->contents
+ off
);
3958 /* Note that this is harmless for the GOTPLT64
3959 case, as -1 | 1 still is -1. */
3965 relocation
= (base_got
->output_section
->vma
3966 + base_got
->output_offset
+ off
);
3972 /* When generating a shared object, the relocations handled here are
3973 copied into the output file to be resolved at run time. */
3976 case R_X86_64_GOT32
:
3977 case R_X86_64_GOT64
:
3978 /* Relocation is to the entry for this symbol in the global
3980 case R_X86_64_GOTPCREL
:
3981 case R_X86_64_GOTPCREL64
:
3982 /* Use global offset table entry as symbol value. */
3983 case R_X86_64_GOTPLT64
:
3984 /* This is obsolete and treated the the same as GOT64. */
3985 base_got
= htab
->elf
.sgot
;
3987 if (htab
->elf
.sgot
== NULL
)
3994 off
= h
->got
.offset
;
3996 && h
->plt
.offset
!= (bfd_vma
)-1
3997 && off
== (bfd_vma
)-1)
3999 /* We can't use h->got.offset here to save
4000 state, or even just remember the offset, as
4001 finish_dynamic_symbol would use that as offset into
4003 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
4004 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
4005 base_got
= htab
->elf
.sgotplt
;
4008 dyn
= htab
->elf
.dynamic_sections_created
;
4010 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
4012 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4013 || (ELF_ST_VISIBILITY (h
->other
)
4014 && h
->root
.type
== bfd_link_hash_undefweak
))
4016 /* This is actually a static link, or it is a -Bsymbolic
4017 link and the symbol is defined locally, or the symbol
4018 was forced to be local because of a version file. We
4019 must initialize this entry in the global offset table.
4020 Since the offset must always be a multiple of 8, we
4021 use the least significant bit to record whether we
4022 have initialized it already.
4024 When doing a dynamic link, we create a .rela.got
4025 relocation entry to initialize the value. This is
4026 done in the finish_dynamic_symbol routine. */
4031 bfd_put_64 (output_bfd
, relocation
,
4032 base_got
->contents
+ off
);
4033 /* Note that this is harmless for the GOTPLT64 case,
4034 as -1 | 1 still is -1. */
4039 unresolved_reloc
= FALSE
;
4043 if (local_got_offsets
== NULL
)
4046 off
= local_got_offsets
[r_symndx
];
4048 /* The offset must always be a multiple of 8. We use
4049 the least significant bit to record whether we have
4050 already generated the necessary reloc. */
4055 bfd_put_64 (output_bfd
, relocation
,
4056 base_got
->contents
+ off
);
4061 Elf_Internal_Rela outrel
;
4063 /* We need to generate a R_X86_64_RELATIVE reloc
4064 for the dynamic linker. */
4065 s
= htab
->elf
.srelgot
;
4069 outrel
.r_offset
= (base_got
->output_section
->vma
4070 + base_got
->output_offset
4072 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4073 outrel
.r_addend
= relocation
;
4074 elf_append_rela (output_bfd
, s
, &outrel
);
4077 local_got_offsets
[r_symndx
] |= 1;
4081 if (off
>= (bfd_vma
) -2)
4084 relocation
= base_got
->output_section
->vma
4085 + base_got
->output_offset
+ off
;
4086 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
4087 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4088 - htab
->elf
.sgotplt
->output_offset
;
4092 case R_X86_64_GOTOFF64
:
4093 /* Relocation is relative to the start of the global offset
4096 /* Check to make sure it isn't a protected function or data
4097 symbol for shared library since it may not be local when
4098 used as function address or with copy relocation. We also
4099 need to make sure that a symbol is referenced locally. */
4100 if (info
->shared
&& h
)
4102 if (!h
->def_regular
)
4106 switch (ELF_ST_VISIBILITY (h
->other
))
4109 v
= _("hidden symbol");
4112 v
= _("internal symbol");
4115 v
= _("protected symbol");
4122 (*_bfd_error_handler
)
4123 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
4124 input_bfd
, v
, h
->root
.root
.string
);
4125 bfd_set_error (bfd_error_bad_value
);
4128 else if (!info
->executable
4129 && !SYMBOL_REFERENCES_LOCAL (info
, h
)
4130 && (h
->type
== STT_FUNC
4131 || h
->type
== STT_OBJECT
)
4132 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4134 (*_bfd_error_handler
)
4135 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
4137 h
->type
== STT_FUNC
? "function" : "data",
4138 h
->root
.root
.string
);
4139 bfd_set_error (bfd_error_bad_value
);
4144 /* Note that sgot is not involved in this
4145 calculation. We always want the start of .got.plt. If we
4146 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4147 permitted by the ABI, we might have to change this
4149 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4150 + htab
->elf
.sgotplt
->output_offset
;
4153 case R_X86_64_GOTPC32
:
4154 case R_X86_64_GOTPC64
:
4155 /* Use global offset table as symbol value. */
4156 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4157 + htab
->elf
.sgotplt
->output_offset
;
4158 unresolved_reloc
= FALSE
;
4161 case R_X86_64_PLTOFF64
:
4162 /* Relocation is PLT entry relative to GOT. For local
4163 symbols it's the symbol itself relative to GOT. */
4165 /* See PLT32 handling. */
4166 && h
->plt
.offset
!= (bfd_vma
) -1
4167 && htab
->elf
.splt
!= NULL
)
4169 if (htab
->plt_bnd
!= NULL
)
4171 resolved_plt
= htab
->plt_bnd
;
4172 plt_offset
= eh
->plt_bnd
.offset
;
4176 resolved_plt
= htab
->elf
.splt
;
4177 plt_offset
= h
->plt
.offset
;
4180 relocation
= (resolved_plt
->output_section
->vma
4181 + resolved_plt
->output_offset
4183 unresolved_reloc
= FALSE
;
4186 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4187 + htab
->elf
.sgotplt
->output_offset
;
4190 case R_X86_64_PLT32
:
4191 case R_X86_64_PLT32_BND
:
4192 /* Relocation is to the entry for this symbol in the
4193 procedure linkage table. */
4195 /* Resolve a PLT32 reloc against a local symbol directly,
4196 without using the procedure linkage table. */
4200 if ((h
->plt
.offset
== (bfd_vma
) -1
4201 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4202 || htab
->elf
.splt
== NULL
)
4204 /* We didn't make a PLT entry for this symbol. This
4205 happens when statically linking PIC code, or when
4206 using -Bsymbolic. */
4210 if (h
->plt
.offset
!= (bfd_vma
) -1)
4212 if (htab
->plt_bnd
!= NULL
)
4214 resolved_plt
= htab
->plt_bnd
;
4215 plt_offset
= eh
->plt_bnd
.offset
;
4219 resolved_plt
= htab
->elf
.splt
;
4220 plt_offset
= h
->plt
.offset
;
4225 /* Use the GOT PLT. */
4226 resolved_plt
= htab
->plt_got
;
4227 plt_offset
= eh
->plt_got
.offset
;
4230 relocation
= (resolved_plt
->output_section
->vma
4231 + resolved_plt
->output_offset
4233 unresolved_reloc
= FALSE
;
4236 case R_X86_64_SIZE32
:
4237 case R_X86_64_SIZE64
:
4238 /* Set to symbol size. */
4239 relocation
= st_size
;
4245 case R_X86_64_PC32_BND
:
4246 /* Don't complain about -fPIC if the symbol is undefined when
4247 building executable. */
4249 && (input_section
->flags
& SEC_ALLOC
) != 0
4250 && (input_section
->flags
& SEC_READONLY
) != 0
4252 && !(info
->executable
4253 && h
->root
.type
== bfd_link_hash_undefined
))
4255 bfd_boolean fail
= FALSE
;
4257 = ((r_type
== R_X86_64_PC32
4258 || r_type
== R_X86_64_PC32_BND
)
4259 && is_32bit_relative_branch (contents
, rel
->r_offset
));
4261 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
4263 /* Symbol is referenced locally. Make sure it is
4264 defined locally or for a branch. */
4265 fail
= !h
->def_regular
&& !branch
;
4267 else if (!(info
->executable
4268 && (h
->needs_copy
|| eh
->needs_copy
)))
4270 /* Symbol doesn't need copy reloc and isn't referenced
4271 locally. We only allow branch to symbol with
4272 non-default visibility. */
4274 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
4281 const char *pic
= "";
4283 switch (ELF_ST_VISIBILITY (h
->other
))
4286 v
= _("hidden symbol");
4289 v
= _("internal symbol");
4292 v
= _("protected symbol");
4296 pic
= _("; recompile with -fPIC");
4301 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4303 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4305 (*_bfd_error_handler
) (fmt
, input_bfd
,
4306 x86_64_elf_howto_table
[r_type
].name
,
4307 v
, h
->root
.root
.string
, pic
);
4308 bfd_set_error (bfd_error_bad_value
);
4319 /* FIXME: The ABI says the linker should make sure the value is
4320 the same when it's zeroextended to 64 bit. */
4323 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4326 /* Don't copy a pc-relative relocation into the output file
4327 if the symbol needs copy reloc or the symbol is undefined
4328 when building executable. */
4330 && !(info
->executable
4334 || h
->root
.type
== bfd_link_hash_undefined
)
4335 && IS_X86_64_PCREL_TYPE (r_type
))
4337 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4338 || h
->root
.type
!= bfd_link_hash_undefweak
)
4339 && ((! IS_X86_64_PCREL_TYPE (r_type
)
4340 && r_type
!= R_X86_64_SIZE32
4341 && r_type
!= R_X86_64_SIZE64
)
4342 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
4343 || (ELIMINATE_COPY_RELOCS
4350 || h
->root
.type
== bfd_link_hash_undefweak
4351 || h
->root
.type
== bfd_link_hash_undefined
)))
4353 Elf_Internal_Rela outrel
;
4354 bfd_boolean skip
, relocate
;
4357 /* When generating a shared object, these relocations
4358 are copied into the output file to be resolved at run
4364 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4366 if (outrel
.r_offset
== (bfd_vma
) -1)
4368 else if (outrel
.r_offset
== (bfd_vma
) -2)
4369 skip
= TRUE
, relocate
= TRUE
;
4371 outrel
.r_offset
+= (input_section
->output_section
->vma
4372 + input_section
->output_offset
);
4375 memset (&outrel
, 0, sizeof outrel
);
4377 /* h->dynindx may be -1 if this symbol was marked to
4381 && (IS_X86_64_PCREL_TYPE (r_type
)
4383 || ! SYMBOLIC_BIND (info
, h
)
4384 || ! h
->def_regular
))
4386 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
4387 outrel
.r_addend
= rel
->r_addend
;
4391 /* This symbol is local, or marked to become local. */
4392 if (r_type
== htab
->pointer_r_type
)
4395 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4396 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4398 else if (r_type
== R_X86_64_64
4399 && !ABI_64_P (output_bfd
))
4402 outrel
.r_info
= htab
->r_info (0,
4403 R_X86_64_RELATIVE64
);
4404 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4405 /* Check addend overflow. */
4406 if ((outrel
.r_addend
& 0x80000000)
4407 != (rel
->r_addend
& 0x80000000))
4410 int addend
= rel
->r_addend
;
4411 if (h
&& h
->root
.root
.string
)
4412 name
= h
->root
.root
.string
;
4414 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4417 (*_bfd_error_handler
)
4418 (_("%B: addend -0x%x in relocation %s against "
4419 "symbol `%s' at 0x%lx in section `%A' is "
4421 input_bfd
, input_section
, addend
,
4422 x86_64_elf_howto_table
[r_type
].name
,
4423 name
, (unsigned long) rel
->r_offset
);
4425 (*_bfd_error_handler
)
4426 (_("%B: addend 0x%x in relocation %s against "
4427 "symbol `%s' at 0x%lx in section `%A' is "
4429 input_bfd
, input_section
, addend
,
4430 x86_64_elf_howto_table
[r_type
].name
,
4431 name
, (unsigned long) rel
->r_offset
);
4432 bfd_set_error (bfd_error_bad_value
);
4440 if (bfd_is_abs_section (sec
))
4442 else if (sec
== NULL
|| sec
->owner
== NULL
)
4444 bfd_set_error (bfd_error_bad_value
);
4451 /* We are turning this relocation into one
4452 against a section symbol. It would be
4453 proper to subtract the symbol's value,
4454 osec->vma, from the emitted reloc addend,
4455 but ld.so expects buggy relocs. */
4456 osec
= sec
->output_section
;
4457 sindx
= elf_section_data (osec
)->dynindx
;
4460 asection
*oi
= htab
->elf
.text_index_section
;
4461 sindx
= elf_section_data (oi
)->dynindx
;
4463 BFD_ASSERT (sindx
!= 0);
4466 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
4467 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4471 sreloc
= elf_section_data (input_section
)->sreloc
;
4473 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4475 r
= bfd_reloc_notsupported
;
4476 goto check_relocation_error
;
4479 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4481 /* If this reloc is against an external symbol, we do
4482 not want to fiddle with the addend. Otherwise, we
4483 need to include the symbol value so that it becomes
4484 an addend for the dynamic reloc. */
4491 case R_X86_64_TLSGD
:
4492 case R_X86_64_GOTPC32_TLSDESC
:
4493 case R_X86_64_TLSDESC_CALL
:
4494 case R_X86_64_GOTTPOFF
:
4495 tls_type
= GOT_UNKNOWN
;
4496 if (h
== NULL
&& local_got_offsets
)
4497 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
4499 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
4501 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4502 input_section
, contents
,
4503 symtab_hdr
, sym_hashes
,
4504 &r_type
, tls_type
, rel
,
4505 relend
, h
, r_symndx
))
4508 if (r_type
== R_X86_64_TPOFF32
)
4510 bfd_vma roff
= rel
->r_offset
;
4512 BFD_ASSERT (! unresolved_reloc
);
4514 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4516 /* GD->LE transition. For 64bit, change
4517 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4518 .word 0x6666; rex64; call __tls_get_addr
4521 leaq foo@tpoff(%rax), %rax
4523 leaq foo@tlsgd(%rip), %rdi
4524 .word 0x6666; rex64; call __tls_get_addr
4527 leaq foo@tpoff(%rax), %rax
4528 For largepic, change:
4529 leaq foo@tlsgd(%rip), %rdi
4530 movabsq $__tls_get_addr@pltoff, %rax
4535 leaq foo@tpoff(%rax), %rax
4536 nopw 0x0(%rax,%rax,1) */
4538 if (ABI_64_P (output_bfd
)
4539 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4541 memcpy (contents
+ roff
- 3,
4542 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4543 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4546 else if (ABI_64_P (output_bfd
))
4547 memcpy (contents
+ roff
- 4,
4548 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4551 memcpy (contents
+ roff
- 3,
4552 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4554 bfd_put_32 (output_bfd
,
4555 elf_x86_64_tpoff (info
, relocation
),
4556 contents
+ roff
+ 8 + largepic
);
4557 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4561 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4563 /* GDesc -> LE transition.
4564 It's originally something like:
4565 leaq x@tlsdesc(%rip), %rax
4568 movl $x@tpoff, %rax. */
4570 unsigned int val
, type
;
4572 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4573 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4574 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4575 contents
+ roff
- 3);
4576 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4577 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4578 contents
+ roff
- 1);
4579 bfd_put_32 (output_bfd
,
4580 elf_x86_64_tpoff (info
, relocation
),
4584 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4586 /* GDesc -> LE transition.
4591 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4592 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4595 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4597 /* IE->LE transition:
4598 For 64bit, originally it can be one of:
4599 movq foo@gottpoff(%rip), %reg
4600 addq foo@gottpoff(%rip), %reg
4603 leaq foo(%reg), %reg
4605 For 32bit, originally it can be one of:
4606 movq foo@gottpoff(%rip), %reg
4607 addl foo@gottpoff(%rip), %reg
4610 leal foo(%reg), %reg
4613 unsigned int val
, type
, reg
;
4616 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4619 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4620 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4626 bfd_put_8 (output_bfd
, 0x49,
4627 contents
+ roff
- 3);
4628 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4629 bfd_put_8 (output_bfd
, 0x41,
4630 contents
+ roff
- 3);
4631 bfd_put_8 (output_bfd
, 0xc7,
4632 contents
+ roff
- 2);
4633 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4634 contents
+ roff
- 1);
4638 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4641 bfd_put_8 (output_bfd
, 0x49,
4642 contents
+ roff
- 3);
4643 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4644 bfd_put_8 (output_bfd
, 0x41,
4645 contents
+ roff
- 3);
4646 bfd_put_8 (output_bfd
, 0x81,
4647 contents
+ roff
- 2);
4648 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4649 contents
+ roff
- 1);
4653 /* addq/addl -> leaq/leal */
4655 bfd_put_8 (output_bfd
, 0x4d,
4656 contents
+ roff
- 3);
4657 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4658 bfd_put_8 (output_bfd
, 0x45,
4659 contents
+ roff
- 3);
4660 bfd_put_8 (output_bfd
, 0x8d,
4661 contents
+ roff
- 2);
4662 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4663 contents
+ roff
- 1);
4665 bfd_put_32 (output_bfd
,
4666 elf_x86_64_tpoff (info
, relocation
),
4674 if (htab
->elf
.sgot
== NULL
)
4679 off
= h
->got
.offset
;
4680 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4684 if (local_got_offsets
== NULL
)
4687 off
= local_got_offsets
[r_symndx
];
4688 offplt
= local_tlsdesc_gotents
[r_symndx
];
4695 Elf_Internal_Rela outrel
;
4699 if (htab
->elf
.srelgot
== NULL
)
4702 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4704 if (GOT_TLS_GDESC_P (tls_type
))
4706 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4707 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4708 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4709 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4710 + htab
->elf
.sgotplt
->output_offset
4712 + htab
->sgotplt_jump_table_size
);
4713 sreloc
= htab
->elf
.srelplt
;
4715 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4717 outrel
.r_addend
= 0;
4718 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4721 sreloc
= htab
->elf
.srelgot
;
4723 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4724 + htab
->elf
.sgot
->output_offset
+ off
);
4726 if (GOT_TLS_GD_P (tls_type
))
4727 dr_type
= R_X86_64_DTPMOD64
;
4728 else if (GOT_TLS_GDESC_P (tls_type
))
4731 dr_type
= R_X86_64_TPOFF64
;
4733 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4734 outrel
.r_addend
= 0;
4735 if ((dr_type
== R_X86_64_TPOFF64
4736 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4737 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4738 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4740 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4742 if (GOT_TLS_GD_P (tls_type
))
4746 BFD_ASSERT (! unresolved_reloc
);
4747 bfd_put_64 (output_bfd
,
4748 relocation
- elf_x86_64_dtpoff_base (info
),
4749 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4753 bfd_put_64 (output_bfd
, 0,
4754 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4755 outrel
.r_info
= htab
->r_info (indx
,
4757 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4758 elf_append_rela (output_bfd
, sreloc
,
4767 local_got_offsets
[r_symndx
] |= 1;
4770 if (off
>= (bfd_vma
) -2
4771 && ! GOT_TLS_GDESC_P (tls_type
))
4773 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4775 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4776 || r_type
== R_X86_64_TLSDESC_CALL
)
4777 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4778 + htab
->elf
.sgotplt
->output_offset
4779 + offplt
+ htab
->sgotplt_jump_table_size
;
4781 relocation
= htab
->elf
.sgot
->output_section
->vma
4782 + htab
->elf
.sgot
->output_offset
+ off
;
4783 unresolved_reloc
= FALSE
;
4787 bfd_vma roff
= rel
->r_offset
;
4789 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4791 /* GD->IE transition. For 64bit, change
4792 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4793 .word 0x6666; rex64; call __tls_get_addr@plt
4796 addq foo@gottpoff(%rip), %rax
4798 leaq foo@tlsgd(%rip), %rdi
4799 .word 0x6666; rex64; call __tls_get_addr@plt
4802 addq foo@gottpoff(%rip), %rax
4803 For largepic, change:
4804 leaq foo@tlsgd(%rip), %rdi
4805 movabsq $__tls_get_addr@pltoff, %rax
4810 addq foo@gottpoff(%rax), %rax
4811 nopw 0x0(%rax,%rax,1) */
4813 if (ABI_64_P (output_bfd
)
4814 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4816 memcpy (contents
+ roff
- 3,
4817 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4818 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4821 else if (ABI_64_P (output_bfd
))
4822 memcpy (contents
+ roff
- 4,
4823 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4826 memcpy (contents
+ roff
- 3,
4827 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4830 relocation
= (htab
->elf
.sgot
->output_section
->vma
4831 + htab
->elf
.sgot
->output_offset
+ off
4834 - input_section
->output_section
->vma
4835 - input_section
->output_offset
4837 bfd_put_32 (output_bfd
, relocation
,
4838 contents
+ roff
+ 8 + largepic
);
4839 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4843 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4845 /* GDesc -> IE transition.
4846 It's originally something like:
4847 leaq x@tlsdesc(%rip), %rax
4850 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4852 /* Now modify the instruction as appropriate. To
4853 turn a leaq into a movq in the form we use it, it
4854 suffices to change the second byte from 0x8d to
4856 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4858 bfd_put_32 (output_bfd
,
4859 htab
->elf
.sgot
->output_section
->vma
4860 + htab
->elf
.sgot
->output_offset
+ off
4862 - input_section
->output_section
->vma
4863 - input_section
->output_offset
4868 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4870 /* GDesc -> IE transition.
4877 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4878 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4886 case R_X86_64_TLSLD
:
4887 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4888 input_section
, contents
,
4889 symtab_hdr
, sym_hashes
,
4890 &r_type
, GOT_UNKNOWN
,
4891 rel
, relend
, h
, r_symndx
))
4894 if (r_type
!= R_X86_64_TLSLD
)
4896 /* LD->LE transition:
4897 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4898 For 64bit, we change it into:
4899 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4900 For 32bit, we change it into:
4901 nopl 0x0(%rax); movl %fs:0, %eax.
4902 For largepic, change:
4903 leaq foo@tlsgd(%rip), %rdi
4904 movabsq $__tls_get_addr@pltoff, %rax
4908 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4911 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4912 if (ABI_64_P (output_bfd
)
4913 && contents
[rel
->r_offset
+ 5] == (bfd_byte
) '\xb8')
4914 memcpy (contents
+ rel
->r_offset
- 3,
4915 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4916 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4917 else if (ABI_64_P (output_bfd
))
4918 memcpy (contents
+ rel
->r_offset
- 3,
4919 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4921 memcpy (contents
+ rel
->r_offset
- 3,
4922 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4923 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4928 if (htab
->elf
.sgot
== NULL
)
4931 off
= htab
->tls_ld_got
.offset
;
4936 Elf_Internal_Rela outrel
;
4938 if (htab
->elf
.srelgot
== NULL
)
4941 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4942 + htab
->elf
.sgot
->output_offset
+ off
);
4944 bfd_put_64 (output_bfd
, 0,
4945 htab
->elf
.sgot
->contents
+ off
);
4946 bfd_put_64 (output_bfd
, 0,
4947 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4948 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4949 outrel
.r_addend
= 0;
4950 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4952 htab
->tls_ld_got
.offset
|= 1;
4954 relocation
= htab
->elf
.sgot
->output_section
->vma
4955 + htab
->elf
.sgot
->output_offset
+ off
;
4956 unresolved_reloc
= FALSE
;
4959 case R_X86_64_DTPOFF32
:
4960 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4961 relocation
-= elf_x86_64_dtpoff_base (info
);
4963 relocation
= elf_x86_64_tpoff (info
, relocation
);
4966 case R_X86_64_TPOFF32
:
4967 case R_X86_64_TPOFF64
:
4968 BFD_ASSERT (info
->executable
);
4969 relocation
= elf_x86_64_tpoff (info
, relocation
);
4972 case R_X86_64_DTPOFF64
:
4973 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4974 relocation
-= elf_x86_64_dtpoff_base (info
);
4981 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4982 because such sections are not SEC_ALLOC and thus ld.so will
4983 not process them. */
4984 if (unresolved_reloc
4985 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4987 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4988 rel
->r_offset
) != (bfd_vma
) -1)
4990 (*_bfd_error_handler
)
4991 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4994 (long) rel
->r_offset
,
4996 h
->root
.root
.string
);
5001 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5002 contents
, rel
->r_offset
,
5003 relocation
, rel
->r_addend
);
5005 check_relocation_error
:
5006 if (r
!= bfd_reloc_ok
)
5011 name
= h
->root
.root
.string
;
5014 name
= bfd_elf_string_from_elf_section (input_bfd
,
5015 symtab_hdr
->sh_link
,
5020 name
= bfd_section_name (input_bfd
, sec
);
5023 if (r
== bfd_reloc_overflow
)
5025 if (! ((*info
->callbacks
->reloc_overflow
)
5026 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5027 (bfd_vma
) 0, input_bfd
, input_section
,
5033 (*_bfd_error_handler
)
5034 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5035 input_bfd
, input_section
,
5036 (long) rel
->r_offset
, name
, (int) r
);
5045 /* Finish up dynamic symbol handling. We set the contents of various
5046 dynamic sections here. */
5049 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
5050 struct bfd_link_info
*info
,
5051 struct elf_link_hash_entry
*h
,
5052 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
5054 struct elf_x86_64_link_hash_table
*htab
;
5055 const struct elf_x86_64_backend_data
*abed
;
5056 bfd_boolean use_plt_bnd
;
5057 struct elf_x86_64_link_hash_entry
*eh
;
5059 htab
= elf_x86_64_hash_table (info
);
5063 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5064 section only if there is .plt section. */
5065 use_plt_bnd
= htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
;
5067 ? &elf_x86_64_bnd_arch_bed
5068 : get_elf_x86_64_backend_data (output_bfd
));
5070 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
5072 if (h
->plt
.offset
!= (bfd_vma
) -1)
5075 bfd_vma got_offset
, plt_offset
, plt_plt_offset
, plt_got_offset
;
5076 bfd_vma plt_plt_insn_end
, plt_got_insn_size
;
5077 Elf_Internal_Rela rela
;
5079 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
5080 const struct elf_backend_data
*bed
;
5081 bfd_vma plt_got_pcrel_offset
;
5083 /* When building a static executable, use .iplt, .igot.plt and
5084 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5085 if (htab
->elf
.splt
!= NULL
)
5087 plt
= htab
->elf
.splt
;
5088 gotplt
= htab
->elf
.sgotplt
;
5089 relplt
= htab
->elf
.srelplt
;
5093 plt
= htab
->elf
.iplt
;
5094 gotplt
= htab
->elf
.igotplt
;
5095 relplt
= htab
->elf
.irelplt
;
5098 /* This symbol has an entry in the procedure linkage table. Set
5100 if ((h
->dynindx
== -1
5101 && !((h
->forced_local
|| info
->executable
)
5103 && h
->type
== STT_GNU_IFUNC
))
5109 /* Get the index in the procedure linkage table which
5110 corresponds to this symbol. This is the index of this symbol
5111 in all the symbols for which we are making plt entries. The
5112 first entry in the procedure linkage table is reserved.
5114 Get the offset into the .got table of the entry that
5115 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5116 bytes. The first three are reserved for the dynamic linker.
5118 For static executables, we don't reserve anything. */
5120 if (plt
== htab
->elf
.splt
)
5122 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
5123 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
5127 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
5128 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
5131 plt_plt_insn_end
= abed
->plt_plt_insn_end
;
5132 plt_plt_offset
= abed
->plt_plt_offset
;
5133 plt_got_insn_size
= abed
->plt_got_insn_size
;
5134 plt_got_offset
= abed
->plt_got_offset
;
5137 /* Use the second PLT with BND relocations. */
5138 const bfd_byte
*plt_entry
, *plt2_entry
;
5140 if (eh
->has_bnd_reloc
)
5142 plt_entry
= elf_x86_64_bnd_plt_entry
;
5143 plt2_entry
= elf_x86_64_bnd_plt2_entry
;
5147 plt_entry
= elf_x86_64_legacy_plt_entry
;
5148 plt2_entry
= elf_x86_64_legacy_plt2_entry
;
5150 /* Subtract 1 since there is no BND prefix. */
5151 plt_plt_insn_end
-= 1;
5152 plt_plt_offset
-= 1;
5153 plt_got_insn_size
-= 1;
5154 plt_got_offset
-= 1;
5157 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry
)
5158 == sizeof (elf_x86_64_legacy_plt_entry
));
5160 /* Fill in the entry in the procedure linkage table. */
5161 memcpy (plt
->contents
+ h
->plt
.offset
,
5162 plt_entry
, sizeof (elf_x86_64_legacy_plt_entry
));
5163 /* Fill in the entry in the second PLT. */
5164 memcpy (htab
->plt_bnd
->contents
+ eh
->plt_bnd
.offset
,
5165 plt2_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5167 resolved_plt
= htab
->plt_bnd
;
5168 plt_offset
= eh
->plt_bnd
.offset
;
5172 /* Fill in the entry in the procedure linkage table. */
5173 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
5174 abed
->plt_entry_size
);
5177 plt_offset
= h
->plt
.offset
;
5180 /* Insert the relocation positions of the plt section. */
5182 /* Put offset the PC-relative instruction referring to the GOT entry,
5183 subtracting the size of that instruction. */
5184 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
5185 + gotplt
->output_offset
5187 - resolved_plt
->output_section
->vma
5188 - resolved_plt
->output_offset
5190 - plt_got_insn_size
);
5192 /* Check PC-relative offset overflow in PLT entry. */
5193 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
5194 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5195 output_bfd
, h
->root
.root
.string
);
5197 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
5198 resolved_plt
->contents
+ plt_offset
+ plt_got_offset
);
5200 /* Fill in the entry in the global offset table, initially this
5201 points to the second part of the PLT entry. */
5202 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5203 + plt
->output_offset
5204 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
5205 gotplt
->contents
+ got_offset
);
5207 /* Fill in the entry in the .rela.plt section. */
5208 rela
.r_offset
= (gotplt
->output_section
->vma
5209 + gotplt
->output_offset
5211 if (h
->dynindx
== -1
5212 || ((info
->executable
5213 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5215 && h
->type
== STT_GNU_IFUNC
))
5217 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5218 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5219 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
5220 rela
.r_addend
= (h
->root
.u
.def
.value
5221 + h
->root
.u
.def
.section
->output_section
->vma
5222 + h
->root
.u
.def
.section
->output_offset
);
5223 /* R_X86_64_IRELATIVE comes last. */
5224 plt_index
= htab
->next_irelative_index
--;
5228 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
5230 plt_index
= htab
->next_jump_slot_index
++;
5233 /* Don't fill PLT entry for static executables. */
5234 if (plt
== htab
->elf
.splt
)
5236 bfd_vma plt0_offset
= h
->plt
.offset
+ plt_plt_insn_end
;
5238 /* Put relocation index. */
5239 bfd_put_32 (output_bfd
, plt_index
,
5240 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
5242 /* Put offset for jmp .PLT0 and check for overflow. We don't
5243 check relocation index for overflow since branch displacement
5244 will overflow first. */
5245 if (plt0_offset
> 0x80000000)
5246 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5247 output_bfd
, h
->root
.root
.string
);
5248 bfd_put_32 (output_bfd
, - plt0_offset
,
5249 plt
->contents
+ h
->plt
.offset
+ plt_plt_offset
);
5252 bed
= get_elf_backend_data (output_bfd
);
5253 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
5254 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
5256 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5258 bfd_vma got_offset
, plt_offset
, plt_got_offset
, plt_got_insn_size
;
5259 asection
*plt
, *got
;
5260 bfd_boolean got_after_plt
;
5261 int32_t got_pcrel_offset
;
5262 const bfd_byte
*got_plt_entry
;
5264 /* Set the entry in the GOT procedure linkage table. */
5265 plt
= htab
->plt_got
;
5266 got
= htab
->elf
.sgot
;
5267 got_offset
= h
->got
.offset
;
5269 if (got_offset
== (bfd_vma
) -1
5270 || h
->type
== STT_GNU_IFUNC
5275 /* Use the second PLT entry template for the GOT PLT since they
5276 are the identical. */
5277 plt_got_insn_size
= elf_x86_64_bnd_arch_bed
.plt_got_insn_size
;
5278 plt_got_offset
= elf_x86_64_bnd_arch_bed
.plt_got_offset
;
5279 if (eh
->has_bnd_reloc
)
5280 got_plt_entry
= elf_x86_64_bnd_plt2_entry
;
5283 got_plt_entry
= elf_x86_64_legacy_plt2_entry
;
5285 /* Subtract 1 since there is no BND prefix. */
5286 plt_got_insn_size
-= 1;
5287 plt_got_offset
-= 1;
5290 /* Fill in the entry in the GOT procedure linkage table. */
5291 plt_offset
= eh
->plt_got
.offset
;
5292 memcpy (plt
->contents
+ plt_offset
,
5293 got_plt_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5295 /* Put offset the PC-relative instruction referring to the GOT
5296 entry, subtracting the size of that instruction. */
5297 got_pcrel_offset
= (got
->output_section
->vma
5298 + got
->output_offset
5300 - plt
->output_section
->vma
5301 - plt
->output_offset
5303 - plt_got_insn_size
);
5305 /* Check PC-relative offset overflow in GOT PLT entry. */
5306 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
5307 if ((got_after_plt
&& got_pcrel_offset
< 0)
5308 || (!got_after_plt
&& got_pcrel_offset
> 0))
5309 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5310 output_bfd
, h
->root
.root
.string
);
5312 bfd_put_32 (output_bfd
, got_pcrel_offset
,
5313 plt
->contents
+ plt_offset
+ plt_got_offset
);
5317 && (h
->plt
.offset
!= (bfd_vma
) -1
5318 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5320 /* Mark the symbol as undefined, rather than as defined in
5321 the .plt section. Leave the value if there were any
5322 relocations where pointer equality matters (this is a clue
5323 for the dynamic linker, to make function pointer
5324 comparisons work between an application and shared
5325 library), otherwise set it to zero. If a function is only
5326 called from a binary, there is no need to slow down
5327 shared libraries because of that. */
5328 sym
->st_shndx
= SHN_UNDEF
;
5329 if (!h
->pointer_equality_needed
)
5333 if (h
->got
.offset
!= (bfd_vma
) -1
5334 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
5335 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
5337 Elf_Internal_Rela rela
;
5339 /* This symbol has an entry in the global offset table. Set it
5341 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5344 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5345 + htab
->elf
.sgot
->output_offset
5346 + (h
->got
.offset
&~ (bfd_vma
) 1));
5348 /* If this is a static link, or it is a -Bsymbolic link and the
5349 symbol is defined locally or was forced to be local because
5350 of a version file, we just want to emit a RELATIVE reloc.
5351 The entry in the global offset table will already have been
5352 initialized in the relocate_section function. */
5354 && h
->type
== STT_GNU_IFUNC
)
5358 /* Generate R_X86_64_GLOB_DAT. */
5365 if (!h
->pointer_equality_needed
)
5368 /* For non-shared object, we can't use .got.plt, which
5369 contains the real function addres if we need pointer
5370 equality. We load the GOT entry with the PLT entry. */
5371 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5372 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5373 + plt
->output_offset
5375 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5379 else if (info
->shared
5380 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5382 if (!h
->def_regular
)
5384 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5385 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
5386 rela
.r_addend
= (h
->root
.u
.def
.value
5387 + h
->root
.u
.def
.section
->output_section
->vma
5388 + h
->root
.u
.def
.section
->output_offset
);
5392 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5394 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5395 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5396 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
5400 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
5405 Elf_Internal_Rela rela
;
5407 /* This symbol needs a copy reloc. Set it up. */
5409 if (h
->dynindx
== -1
5410 || (h
->root
.type
!= bfd_link_hash_defined
5411 && h
->root
.type
!= bfd_link_hash_defweak
)
5412 || htab
->srelbss
== NULL
)
5415 rela
.r_offset
= (h
->root
.u
.def
.value
5416 + h
->root
.u
.def
.section
->output_section
->vma
5417 + h
->root
.u
.def
.section
->output_offset
);
5418 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
5420 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
5426 /* Finish up local dynamic symbol handling. We set the contents of
5427 various dynamic sections here. */
5430 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
5432 struct elf_link_hash_entry
*h
5433 = (struct elf_link_hash_entry
*) *slot
;
5434 struct bfd_link_info
*info
5435 = (struct bfd_link_info
*) inf
;
5437 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
5441 /* Used to decide how to sort relocs in an optimal manner for the
5442 dynamic linker, before writing them out. */
5444 static enum elf_reloc_type_class
5445 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5446 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5447 const Elf_Internal_Rela
*rela
)
5449 switch ((int) ELF32_R_TYPE (rela
->r_info
))
5451 case R_X86_64_RELATIVE
:
5452 case R_X86_64_RELATIVE64
:
5453 return reloc_class_relative
;
5454 case R_X86_64_JUMP_SLOT
:
5455 return reloc_class_plt
;
5457 return reloc_class_copy
;
5459 return reloc_class_normal
;
5463 /* Finish up the dynamic sections. */
5466 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
5467 struct bfd_link_info
*info
)
5469 struct elf_x86_64_link_hash_table
*htab
;
5472 const struct elf_x86_64_backend_data
*abed
;
5474 htab
= elf_x86_64_hash_table (info
);
5478 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5479 section only if there is .plt section. */
5480 abed
= (htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
5481 ? &elf_x86_64_bnd_arch_bed
5482 : get_elf_x86_64_backend_data (output_bfd
));
5484 dynobj
= htab
->elf
.dynobj
;
5485 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5487 if (htab
->elf
.dynamic_sections_created
)
5489 bfd_byte
*dyncon
, *dynconend
;
5490 const struct elf_backend_data
*bed
;
5491 bfd_size_type sizeof_dyn
;
5493 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5496 bed
= get_elf_backend_data (dynobj
);
5497 sizeof_dyn
= bed
->s
->sizeof_dyn
;
5498 dyncon
= sdyn
->contents
;
5499 dynconend
= sdyn
->contents
+ sdyn
->size
;
5500 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
5502 Elf_Internal_Dyn dyn
;
5505 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
5513 s
= htab
->elf
.sgotplt
;
5514 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5518 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
5522 s
= htab
->elf
.srelplt
->output_section
;
5523 dyn
.d_un
.d_val
= s
->size
;
5527 /* The procedure linkage table relocs (DT_JMPREL) should
5528 not be included in the overall relocs (DT_RELA).
5529 Therefore, we override the DT_RELASZ entry here to
5530 make it not include the JMPREL relocs. Since the
5531 linker script arranges for .rela.plt to follow all
5532 other relocation sections, we don't have to worry
5533 about changing the DT_RELA entry. */
5534 if (htab
->elf
.srelplt
!= NULL
)
5536 s
= htab
->elf
.srelplt
->output_section
;
5537 dyn
.d_un
.d_val
-= s
->size
;
5541 case DT_TLSDESC_PLT
:
5543 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5544 + htab
->tlsdesc_plt
;
5547 case DT_TLSDESC_GOT
:
5549 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5550 + htab
->tlsdesc_got
;
5554 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
5557 /* Fill in the special first entry in the procedure linkage table. */
5558 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5560 /* Fill in the first entry in the procedure linkage table. */
5561 memcpy (htab
->elf
.splt
->contents
,
5562 abed
->plt0_entry
, abed
->plt_entry_size
);
5563 /* Add offset for pushq GOT+8(%rip), since the instruction
5564 uses 6 bytes subtract this value. */
5565 bfd_put_32 (output_bfd
,
5566 (htab
->elf
.sgotplt
->output_section
->vma
5567 + htab
->elf
.sgotplt
->output_offset
5569 - htab
->elf
.splt
->output_section
->vma
5570 - htab
->elf
.splt
->output_offset
5572 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
5573 /* Add offset for the PC-relative instruction accessing GOT+16,
5574 subtracting the offset to the end of that instruction. */
5575 bfd_put_32 (output_bfd
,
5576 (htab
->elf
.sgotplt
->output_section
->vma
5577 + htab
->elf
.sgotplt
->output_offset
5579 - htab
->elf
.splt
->output_section
->vma
5580 - htab
->elf
.splt
->output_offset
5581 - abed
->plt0_got2_insn_end
),
5582 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
5584 elf_section_data (htab
->elf
.splt
->output_section
)
5585 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
5587 if (htab
->tlsdesc_plt
)
5589 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5590 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
5592 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
5593 abed
->plt0_entry
, abed
->plt_entry_size
);
5595 /* Add offset for pushq GOT+8(%rip), since the
5596 instruction uses 6 bytes subtract this value. */
5597 bfd_put_32 (output_bfd
,
5598 (htab
->elf
.sgotplt
->output_section
->vma
5599 + htab
->elf
.sgotplt
->output_offset
5601 - htab
->elf
.splt
->output_section
->vma
5602 - htab
->elf
.splt
->output_offset
5605 htab
->elf
.splt
->contents
5606 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
5607 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5608 where TGD stands for htab->tlsdesc_got, subtracting the offset
5609 to the end of that instruction. */
5610 bfd_put_32 (output_bfd
,
5611 (htab
->elf
.sgot
->output_section
->vma
5612 + htab
->elf
.sgot
->output_offset
5614 - htab
->elf
.splt
->output_section
->vma
5615 - htab
->elf
.splt
->output_offset
5617 - abed
->plt0_got2_insn_end
),
5618 htab
->elf
.splt
->contents
5619 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
5624 if (htab
->plt_bnd
!= NULL
)
5625 elf_section_data (htab
->plt_bnd
->output_section
)
5626 ->this_hdr
.sh_entsize
= sizeof (elf_x86_64_bnd_plt2_entry
);
5628 if (htab
->elf
.sgotplt
)
5630 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5632 (*_bfd_error_handler
)
5633 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5637 /* Fill in the first three entries in the global offset table. */
5638 if (htab
->elf
.sgotplt
->size
> 0)
5640 /* Set the first entry in the global offset table to the address of
5641 the dynamic section. */
5643 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
5645 bfd_put_64 (output_bfd
,
5646 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5647 htab
->elf
.sgotplt
->contents
);
5648 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5649 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
5650 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
5653 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
5657 /* Adjust .eh_frame for .plt section. */
5658 if (htab
->plt_eh_frame
!= NULL
5659 && htab
->plt_eh_frame
->contents
!= NULL
)
5661 if (htab
->elf
.splt
!= NULL
5662 && htab
->elf
.splt
->size
!= 0
5663 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5664 && htab
->elf
.splt
->output_section
!= NULL
5665 && htab
->plt_eh_frame
->output_section
!= NULL
)
5667 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5668 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5669 + htab
->plt_eh_frame
->output_offset
5670 + PLT_FDE_START_OFFSET
;
5671 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5672 htab
->plt_eh_frame
->contents
5673 + PLT_FDE_START_OFFSET
);
5675 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5677 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5679 htab
->plt_eh_frame
->contents
))
5684 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5685 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
5688 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5689 htab_traverse (htab
->loc_hash_table
,
5690 elf_x86_64_finish_local_dynamic_symbol
,
5696 /* Return an array of PLT entry symbol values. */
5699 elf_x86_64_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5702 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5705 bfd_vma
*plt_sym_val
;
5707 bfd_byte
*plt_contents
;
5708 const struct elf_x86_64_backend_data
*bed
;
5709 Elf_Internal_Shdr
*hdr
;
5712 /* Get the .plt section contents. PLT passed down may point to the
5713 .plt.bnd section. Make sure that PLT always points to the .plt
5715 plt_bnd
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5720 plt
= bfd_get_section_by_name (abfd
, ".plt");
5723 bed
= &elf_x86_64_bnd_arch_bed
;
5726 bed
= get_elf_x86_64_backend_data (abfd
);
5728 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5729 if (plt_contents
== NULL
)
5731 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5732 plt_contents
, 0, plt
->size
))
5735 free (plt_contents
);
5739 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5740 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5743 hdr
= &elf_section_data (relplt
)->this_hdr
;
5744 count
= relplt
->size
/ hdr
->sh_entsize
;
5746 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5747 if (plt_sym_val
== NULL
)
5750 for (i
= 0; i
< count
; i
++)
5751 plt_sym_val
[i
] = -1;
5753 plt_offset
= bed
->plt_entry_size
;
5754 p
= relplt
->relocation
;
5755 for (i
= 0; i
< count
; i
++, p
++)
5759 /* Skip unknown relocation. */
5760 if (p
->howto
== NULL
)
5763 if (p
->howto
->type
!= R_X86_64_JUMP_SLOT
5764 && p
->howto
->type
!= R_X86_64_IRELATIVE
)
5767 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5768 + bed
->plt_reloc_offset
));
5769 if (reloc_index
>= count
)
5773 /* This is the index in .plt section. */
5774 long plt_index
= plt_offset
/ bed
->plt_entry_size
;
5775 /* Store VMA + the offset in .plt.bnd section. */
5776 plt_sym_val
[reloc_index
] =
5778 + (plt_index
- 1) * sizeof (elf_x86_64_legacy_plt2_entry
));
5781 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5782 plt_offset
+= bed
->plt_entry_size
;
5784 /* PR binutils/18437: Skip extra relocations in the .rela.plt
5786 if (plt_offset
>= plt
->size
)
5790 free (plt_contents
);
5795 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5799 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
5806 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
5807 as PLT if it exists. */
5808 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5810 plt
= bfd_get_section_by_name (abfd
, ".plt");
5811 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5812 dynsymcount
, dynsyms
, ret
,
5814 elf_x86_64_get_plt_sym_val
);
5817 /* Handle an x86-64 specific section when reading an object file. This
5818 is called when elfcode.h finds a section with an unknown type. */
5821 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
5822 const char *name
, int shindex
)
5824 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
5827 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
5833 /* Hook called by the linker routine which adds symbols from an object
5834 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5838 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5839 struct bfd_link_info
*info
,
5840 Elf_Internal_Sym
*sym
,
5841 const char **namep ATTRIBUTE_UNUSED
,
5842 flagword
*flagsp ATTRIBUTE_UNUSED
,
5848 switch (sym
->st_shndx
)
5850 case SHN_X86_64_LCOMMON
:
5851 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5854 lcomm
= bfd_make_section_with_flags (abfd
,
5858 | SEC_LINKER_CREATED
));
5861 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5864 *valp
= sym
->st_size
;
5868 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5869 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5870 && (abfd
->flags
& DYNAMIC
) == 0
5871 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5872 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5878 /* Given a BFD section, try to locate the corresponding ELF section
5882 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5883 asection
*sec
, int *index_return
)
5885 if (sec
== &_bfd_elf_large_com_section
)
5887 *index_return
= SHN_X86_64_LCOMMON
;
5893 /* Process a symbol. */
5896 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5899 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5901 switch (elfsym
->internal_elf_sym
.st_shndx
)
5903 case SHN_X86_64_LCOMMON
:
5904 asym
->section
= &_bfd_elf_large_com_section
;
5905 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5906 /* Common symbol doesn't set BSF_GLOBAL. */
5907 asym
->flags
&= ~BSF_GLOBAL
;
5913 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5915 return (sym
->st_shndx
== SHN_COMMON
5916 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5920 elf_x86_64_common_section_index (asection
*sec
)
5922 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5925 return SHN_X86_64_LCOMMON
;
5929 elf_x86_64_common_section (asection
*sec
)
5931 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5932 return bfd_com_section_ptr
;
5934 return &_bfd_elf_large_com_section
;
5938 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5939 const Elf_Internal_Sym
*sym
,
5944 const asection
*oldsec
)
5946 /* A normal common symbol and a large common symbol result in a
5947 normal common symbol. We turn the large common symbol into a
5950 && h
->root
.type
== bfd_link_hash_common
5952 && bfd_is_com_section (*psec
)
5955 if (sym
->st_shndx
== SHN_COMMON
5956 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5958 h
->root
.u
.c
.p
->section
5959 = bfd_make_section_old_way (oldbfd
, "COMMON");
5960 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5962 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5963 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5964 *psec
= bfd_com_section_ptr
;
5971 elf_x86_64_additional_program_headers (bfd
*abfd
,
5972 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5977 /* Check to see if we need a large readonly segment. */
5978 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5979 if (s
&& (s
->flags
& SEC_LOAD
))
5982 /* Check to see if we need a large data segment. Since .lbss sections
5983 is placed right after the .bss section, there should be no need for
5984 a large data segment just because of .lbss. */
5985 s
= bfd_get_section_by_name (abfd
, ".ldata");
5986 if (s
&& (s
->flags
& SEC_LOAD
))
5992 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5995 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5997 if (h
->plt
.offset
!= (bfd_vma
) -1
5999 && !h
->pointer_equality_needed
)
6002 return _bfd_elf_hash_symbol (h
);
6005 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
6008 elf_x86_64_relocs_compatible (const bfd_target
*input
,
6009 const bfd_target
*output
)
6011 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
6012 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
6013 && _bfd_elf_relocs_compatible (input
, output
));
6016 static const struct bfd_elf_special_section
6017 elf_x86_64_special_sections
[]=
6019 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6020 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
6021 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
6022 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6023 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6024 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
6025 { NULL
, 0, 0, 0, 0 }
6028 #define TARGET_LITTLE_SYM x86_64_elf64_vec
6029 #define TARGET_LITTLE_NAME "elf64-x86-64"
6030 #define ELF_ARCH bfd_arch_i386
6031 #define ELF_TARGET_ID X86_64_ELF_DATA
6032 #define ELF_MACHINE_CODE EM_X86_64
6033 #define ELF_MAXPAGESIZE 0x200000
6034 #define ELF_MINPAGESIZE 0x1000
6035 #define ELF_COMMONPAGESIZE 0x1000
6037 #define elf_backend_can_gc_sections 1
6038 #define elf_backend_can_refcount 1
6039 #define elf_backend_want_got_plt 1
6040 #define elf_backend_plt_readonly 1
6041 #define elf_backend_want_plt_sym 0
6042 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
6043 #define elf_backend_rela_normal 1
6044 #define elf_backend_plt_alignment 4
6045 #define elf_backend_extern_protected_data 1
6047 #define elf_info_to_howto elf_x86_64_info_to_howto
6049 #define bfd_elf64_bfd_link_hash_table_create \
6050 elf_x86_64_link_hash_table_create
6051 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
6052 #define bfd_elf64_bfd_reloc_name_lookup \
6053 elf_x86_64_reloc_name_lookup
6055 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
6056 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
6057 #define elf_backend_check_relocs elf_x86_64_check_relocs
6058 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
6059 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
6060 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6061 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6062 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
6063 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
6064 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6065 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
6067 #define elf_backend_write_core_note elf_x86_64_write_core_note
6069 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6070 #define elf_backend_relocate_section elf_x86_64_relocate_section
6071 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6072 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
6073 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
6074 #define elf_backend_object_p elf64_x86_64_elf_object_p
6075 #define bfd_elf64_mkobject elf_x86_64_mkobject
6076 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
6078 #define elf_backend_section_from_shdr \
6079 elf_x86_64_section_from_shdr
6081 #define elf_backend_section_from_bfd_section \
6082 elf_x86_64_elf_section_from_bfd_section
6083 #define elf_backend_add_symbol_hook \
6084 elf_x86_64_add_symbol_hook
6085 #define elf_backend_symbol_processing \
6086 elf_x86_64_symbol_processing
6087 #define elf_backend_common_section_index \
6088 elf_x86_64_common_section_index
6089 #define elf_backend_common_section \
6090 elf_x86_64_common_section
6091 #define elf_backend_common_definition \
6092 elf_x86_64_common_definition
6093 #define elf_backend_merge_symbol \
6094 elf_x86_64_merge_symbol
6095 #define elf_backend_special_sections \
6096 elf_x86_64_special_sections
6097 #define elf_backend_additional_program_headers \
6098 elf_x86_64_additional_program_headers
6099 #define elf_backend_hash_symbol \
6100 elf_x86_64_hash_symbol
6102 #include "elf64-target.h"
6104 /* CloudABI support. */
6106 #undef TARGET_LITTLE_SYM
6107 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6108 #undef TARGET_LITTLE_NAME
6109 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6112 #define ELF_OSABI ELFOSABI_CLOUDABI
6115 #define elf64_bed elf64_x86_64_cloudabi_bed
6117 #include "elf64-target.h"
6119 /* FreeBSD support. */
6121 #undef TARGET_LITTLE_SYM
6122 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
6123 #undef TARGET_LITTLE_NAME
6124 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6127 #define ELF_OSABI ELFOSABI_FREEBSD
6130 #define elf64_bed elf64_x86_64_fbsd_bed
6132 #include "elf64-target.h"
6134 /* Solaris 2 support. */
6136 #undef TARGET_LITTLE_SYM
6137 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
6138 #undef TARGET_LITTLE_NAME
6139 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6141 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6142 objects won't be recognized. */
6146 #define elf64_bed elf64_x86_64_sol2_bed
6148 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6150 #undef elf_backend_static_tls_alignment
6151 #define elf_backend_static_tls_alignment 16
6153 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6155 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6157 #undef elf_backend_want_plt_sym
6158 #define elf_backend_want_plt_sym 1
6160 #include "elf64-target.h"
6162 /* Native Client support. */
6165 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
6167 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6168 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
6172 #undef TARGET_LITTLE_SYM
6173 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6174 #undef TARGET_LITTLE_NAME
6175 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6177 #define elf64_bed elf64_x86_64_nacl_bed
6179 #undef ELF_MAXPAGESIZE
6180 #undef ELF_MINPAGESIZE
6181 #undef ELF_COMMONPAGESIZE
6182 #define ELF_MAXPAGESIZE 0x10000
6183 #define ELF_MINPAGESIZE 0x10000
6184 #define ELF_COMMONPAGESIZE 0x10000
6186 /* Restore defaults. */
6188 #undef elf_backend_static_tls_alignment
6189 #undef elf_backend_want_plt_sym
6190 #define elf_backend_want_plt_sym 0
6192 /* NaCl uses substantially different PLT entries for the same effects. */
6194 #undef elf_backend_plt_alignment
6195 #define elf_backend_plt_alignment 5
6196 #define NACL_PLT_ENTRY_SIZE 64
6197 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6199 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
6201 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6202 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6203 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6204 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6205 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6207 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6208 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6210 /* 32 bytes of nop to pad out to the standard size. */
6211 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6212 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6213 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6214 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6215 0x66, /* excess data32 prefix */
6219 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6221 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6222 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6223 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6224 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6226 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6227 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6228 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6230 /* Lazy GOT entries point here (32-byte aligned). */
6231 0x68, /* pushq immediate */
6232 0, 0, 0, 0, /* replaced with index into relocation table. */
6233 0xe9, /* jmp relative */
6234 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6236 /* 22 bytes of nop to pad out to the standard size. */
6237 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6238 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6239 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6242 /* .eh_frame covering the .plt section. */
6244 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
6246 #if (PLT_CIE_LENGTH != 20 \
6247 || PLT_FDE_LENGTH != 36 \
6248 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6249 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6250 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6252 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6253 0, 0, 0, 0, /* CIE ID */
6254 1, /* CIE version */
6255 'z', 'R', 0, /* Augmentation string */
6256 1, /* Code alignment factor */
6257 0x78, /* Data alignment factor */
6258 16, /* Return address column */
6259 1, /* Augmentation size */
6260 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6261 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6262 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6263 DW_CFA_nop
, DW_CFA_nop
,
6265 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6266 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
6267 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6268 0, 0, 0, 0, /* .plt size goes here */
6269 0, /* Augmentation size */
6270 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
6271 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6272 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
6273 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6274 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6275 13, /* Block length */
6276 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
6277 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
6278 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6279 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
6280 DW_CFA_nop
, DW_CFA_nop
6283 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
6285 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
6286 elf_x86_64_nacl_plt_entry
, /* plt_entry */
6287 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6288 2, /* plt0_got1_offset */
6289 9, /* plt0_got2_offset */
6290 13, /* plt0_got2_insn_end */
6291 3, /* plt_got_offset */
6292 33, /* plt_reloc_offset */
6293 38, /* plt_plt_offset */
6294 7, /* plt_got_insn_size */
6295 42, /* plt_plt_insn_end */
6296 32, /* plt_lazy_offset */
6297 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
6298 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
6301 #undef elf_backend_arch_data
6302 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6304 #undef elf_backend_object_p
6305 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6306 #undef elf_backend_modify_segment_map
6307 #define elf_backend_modify_segment_map nacl_modify_segment_map
6308 #undef elf_backend_modify_program_headers
6309 #define elf_backend_modify_program_headers nacl_modify_program_headers
6310 #undef elf_backend_final_write_processing
6311 #define elf_backend_final_write_processing nacl_final_write_processing
6313 #include "elf64-target.h"
6315 /* Native Client x32 support. */
6318 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
6320 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6321 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
6325 #undef TARGET_LITTLE_SYM
6326 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6327 #undef TARGET_LITTLE_NAME
6328 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6330 #define elf32_bed elf32_x86_64_nacl_bed
6332 #define bfd_elf32_bfd_link_hash_table_create \
6333 elf_x86_64_link_hash_table_create
6334 #define bfd_elf32_bfd_reloc_type_lookup \
6335 elf_x86_64_reloc_type_lookup
6336 #define bfd_elf32_bfd_reloc_name_lookup \
6337 elf_x86_64_reloc_name_lookup
6338 #define bfd_elf32_mkobject \
6340 #define bfd_elf32_get_synthetic_symtab \
6341 elf_x86_64_get_synthetic_symtab
6343 #undef elf_backend_object_p
6344 #define elf_backend_object_p \
6345 elf32_x86_64_nacl_elf_object_p
6347 #undef elf_backend_bfd_from_remote_memory
6348 #define elf_backend_bfd_from_remote_memory \
6349 _bfd_elf32_bfd_from_remote_memory
6351 #undef elf_backend_size_info
6352 #define elf_backend_size_info \
6353 _bfd_elf32_size_info
6355 #include "elf32-target.h"
6357 /* Restore defaults. */
6358 #undef elf_backend_object_p
6359 #define elf_backend_object_p elf64_x86_64_elf_object_p
6360 #undef elf_backend_bfd_from_remote_memory
6361 #undef elf_backend_size_info
6362 #undef elf_backend_modify_segment_map
6363 #undef elf_backend_modify_program_headers
6364 #undef elf_backend_final_write_processing
6366 /* Intel L1OM support. */
6369 elf64_l1om_elf_object_p (bfd
*abfd
)
6371 /* Set the right machine number for an L1OM elf64 file. */
6372 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
6376 #undef TARGET_LITTLE_SYM
6377 #define TARGET_LITTLE_SYM l1om_elf64_vec
6378 #undef TARGET_LITTLE_NAME
6379 #define TARGET_LITTLE_NAME "elf64-l1om"
6381 #define ELF_ARCH bfd_arch_l1om
6383 #undef ELF_MACHINE_CODE
6384 #define ELF_MACHINE_CODE EM_L1OM
6389 #define elf64_bed elf64_l1om_bed
6391 #undef elf_backend_object_p
6392 #define elf_backend_object_p elf64_l1om_elf_object_p
6394 /* Restore defaults. */
6395 #undef ELF_MAXPAGESIZE
6396 #undef ELF_MINPAGESIZE
6397 #undef ELF_COMMONPAGESIZE
6398 #define ELF_MAXPAGESIZE 0x200000
6399 #define ELF_MINPAGESIZE 0x1000
6400 #define ELF_COMMONPAGESIZE 0x1000
6401 #undef elf_backend_plt_alignment
6402 #define elf_backend_plt_alignment 4
6403 #undef elf_backend_arch_data
6404 #define elf_backend_arch_data &elf_x86_64_arch_bed
6406 #include "elf64-target.h"
6408 /* FreeBSD L1OM support. */
6410 #undef TARGET_LITTLE_SYM
6411 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6412 #undef TARGET_LITTLE_NAME
6413 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6416 #define ELF_OSABI ELFOSABI_FREEBSD
6419 #define elf64_bed elf64_l1om_fbsd_bed
6421 #include "elf64-target.h"
6423 /* Intel K1OM support. */
6426 elf64_k1om_elf_object_p (bfd
*abfd
)
6428 /* Set the right machine number for an K1OM elf64 file. */
6429 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
6433 #undef TARGET_LITTLE_SYM
6434 #define TARGET_LITTLE_SYM k1om_elf64_vec
6435 #undef TARGET_LITTLE_NAME
6436 #define TARGET_LITTLE_NAME "elf64-k1om"
6438 #define ELF_ARCH bfd_arch_k1om
6440 #undef ELF_MACHINE_CODE
6441 #define ELF_MACHINE_CODE EM_K1OM
6446 #define elf64_bed elf64_k1om_bed
6448 #undef elf_backend_object_p
6449 #define elf_backend_object_p elf64_k1om_elf_object_p
6451 #undef elf_backend_static_tls_alignment
6453 #undef elf_backend_want_plt_sym
6454 #define elf_backend_want_plt_sym 0
6456 #include "elf64-target.h"
6458 /* FreeBSD K1OM support. */
6460 #undef TARGET_LITTLE_SYM
6461 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6462 #undef TARGET_LITTLE_NAME
6463 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6466 #define ELF_OSABI ELFOSABI_FREEBSD
6469 #define elf64_bed elf64_k1om_fbsd_bed
6471 #include "elf64-target.h"
6473 /* 32bit x86-64 support. */
6475 #undef TARGET_LITTLE_SYM
6476 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6477 #undef TARGET_LITTLE_NAME
6478 #define TARGET_LITTLE_NAME "elf32-x86-64"
6482 #define ELF_ARCH bfd_arch_i386
6484 #undef ELF_MACHINE_CODE
6485 #define ELF_MACHINE_CODE EM_X86_64
6489 #undef elf_backend_object_p
6490 #define elf_backend_object_p \
6491 elf32_x86_64_elf_object_p
6493 #undef elf_backend_bfd_from_remote_memory
6494 #define elf_backend_bfd_from_remote_memory \
6495 _bfd_elf32_bfd_from_remote_memory
6497 #undef elf_backend_size_info
6498 #define elf_backend_size_info \
6499 _bfd_elf32_size_info
6501 #include "elf32-target.h"