1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2017 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 "opcode/i386.h"
35 #include "elf/x86-64.h"
42 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
43 #define MINUS_ONE (~ (bfd_vma) 0)
45 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
46 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
47 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
48 since they are the same. */
50 #define ABI_64_P(abfd) \
51 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
53 /* The relocation "howto" table. Order of fields:
54 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
55 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
56 static reloc_howto_type x86_64_elf_howto_table
[] =
58 HOWTO(R_X86_64_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
59 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
61 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
64 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
65 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
67 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
68 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
70 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
71 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
73 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
74 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
76 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
77 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
79 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
80 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
82 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
83 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
85 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
86 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
88 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
89 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
91 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
92 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
94 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
96 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
97 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
98 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
99 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
100 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
101 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
102 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
103 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
105 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
106 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
108 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
109 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
111 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
112 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
114 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
115 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
117 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
118 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
120 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
121 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
123 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
124 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
126 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
127 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
129 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
130 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
131 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
132 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
133 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
134 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
135 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
136 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
138 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
139 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
141 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
142 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
143 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
144 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
145 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
147 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
148 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
150 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
151 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", FALSE
, 0xffffffff, 0xffffffff,
153 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, FALSE
, 0, complain_overflow_unsigned
,
154 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", FALSE
, MINUS_ONE
, MINUS_ONE
,
156 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
157 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
158 "R_X86_64_GOTPC32_TLSDESC",
159 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
160 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
161 complain_overflow_dont
, bfd_elf_generic_reloc
,
162 "R_X86_64_TLSDESC_CALL",
164 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
165 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
167 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
168 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
169 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
171 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
172 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
174 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
175 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", FALSE
, 0xffffffff, 0xffffffff,
177 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
178 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", FALSE
, 0xffffffff, 0xffffffff,
180 HOWTO(R_X86_64_GOTPCRELX
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
181 bfd_elf_generic_reloc
, "R_X86_64_GOTPCRELX", FALSE
, 0xffffffff,
183 HOWTO(R_X86_64_REX_GOTPCRELX
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
184 bfd_elf_generic_reloc
, "R_X86_64_REX_GOTPCRELX", FALSE
, 0xffffffff,
187 /* We have a gap in the reloc numbers here.
188 R_X86_64_standard counts the number up to this point, and
189 R_X86_64_vt_offset is the value to subtract from a reloc type of
190 R_X86_64_GNU_VT* to form an index into this table. */
191 #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
192 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
194 /* GNU extension to record C++ vtable hierarchy. */
195 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
196 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
198 /* GNU extension to record C++ vtable member usage. */
199 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
200 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
203 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
204 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
205 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
209 #define IS_X86_64_PCREL_TYPE(TYPE) \
210 ( ((TYPE) == R_X86_64_PC8) \
211 || ((TYPE) == R_X86_64_PC16) \
212 || ((TYPE) == R_X86_64_PC32) \
213 || ((TYPE) == R_X86_64_PC32_BND) \
214 || ((TYPE) == R_X86_64_PC64))
216 /* Map BFD relocs to the x86_64 elf relocs. */
219 bfd_reloc_code_real_type bfd_reloc_val
;
220 unsigned char elf_reloc_val
;
223 static const struct elf_reloc_map x86_64_reloc_map
[] =
225 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
226 { BFD_RELOC_64
, R_X86_64_64
, },
227 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
228 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
229 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
230 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
231 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
232 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
233 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
234 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
235 { BFD_RELOC_32
, R_X86_64_32
, },
236 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
237 { BFD_RELOC_16
, R_X86_64_16
, },
238 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
239 { BFD_RELOC_8
, R_X86_64_8
, },
240 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
241 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
242 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
243 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
244 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
245 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
246 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
247 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
248 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
249 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
250 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
251 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
252 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
253 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
254 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
255 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
256 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
257 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
258 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
259 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
260 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
261 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
262 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
263 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
, },
264 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
, },
265 { BFD_RELOC_X86_64_GOTPCRELX
, R_X86_64_GOTPCRELX
, },
266 { BFD_RELOC_X86_64_REX_GOTPCRELX
, R_X86_64_REX_GOTPCRELX
, },
267 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
268 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
271 static reloc_howto_type
*
272 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
276 if (r_type
== (unsigned int) R_X86_64_32
)
281 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
283 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
284 || r_type
>= (unsigned int) R_X86_64_max
)
286 if (r_type
>= (unsigned int) R_X86_64_standard
)
288 /* xgettext:c-format */
289 _bfd_error_handler (_("%B: invalid relocation type %d"),
291 r_type
= R_X86_64_NONE
;
296 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
297 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
298 return &x86_64_elf_howto_table
[i
];
301 /* Given a BFD reloc type, return a HOWTO structure. */
302 static reloc_howto_type
*
303 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
304 bfd_reloc_code_real_type code
)
308 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
311 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
312 return elf_x86_64_rtype_to_howto (abfd
,
313 x86_64_reloc_map
[i
].elf_reloc_val
);
318 static reloc_howto_type
*
319 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
324 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
326 /* Get x32 R_X86_64_32. */
327 reloc_howto_type
*reloc
328 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
329 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
333 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
334 if (x86_64_elf_howto_table
[i
].name
!= NULL
335 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
336 return &x86_64_elf_howto_table
[i
];
341 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
344 elf_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
345 Elf_Internal_Rela
*dst
)
349 r_type
= ELF32_R_TYPE (dst
->r_info
);
350 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
351 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
354 /* Support for core dump NOTE sections. */
356 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
361 switch (note
->descsz
)
366 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
368 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
371 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
379 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
381 elf_tdata (abfd
)->core
->signal
382 = bfd_get_16 (abfd
, note
->descdata
+ 12);
385 elf_tdata (abfd
)->core
->lwpid
386 = bfd_get_32 (abfd
, note
->descdata
+ 32);
395 /* Make a ".reg/999" section. */
396 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
397 size
, note
->descpos
+ offset
);
401 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
403 switch (note
->descsz
)
408 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
409 elf_tdata (abfd
)->core
->pid
410 = bfd_get_32 (abfd
, note
->descdata
+ 12);
411 elf_tdata (abfd
)->core
->program
412 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
413 elf_tdata (abfd
)->core
->command
414 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
417 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
418 elf_tdata (abfd
)->core
->pid
419 = bfd_get_32 (abfd
, note
->descdata
+ 24);
420 elf_tdata (abfd
)->core
->program
421 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
422 elf_tdata (abfd
)->core
->command
423 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
426 /* Note that for some reason, a spurious space is tacked
427 onto the end of the args in some (at least one anyway)
428 implementations, so strip it off if it exists. */
431 char *command
= elf_tdata (abfd
)->core
->command
;
432 int n
= strlen (command
);
434 if (0 < n
&& command
[n
- 1] == ' ')
435 command
[n
- 1] = '\0';
443 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
446 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
448 const char *fname
, *psargs
;
459 va_start (ap
, note_type
);
460 fname
= va_arg (ap
, const char *);
461 psargs
= va_arg (ap
, const char *);
464 if (bed
->s
->elfclass
== ELFCLASS32
)
467 memset (&data
, 0, sizeof (data
));
468 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
469 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
470 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
471 &data
, sizeof (data
));
476 memset (&data
, 0, sizeof (data
));
477 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
478 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
479 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
480 &data
, sizeof (data
));
485 va_start (ap
, note_type
);
486 pid
= va_arg (ap
, long);
487 cursig
= va_arg (ap
, int);
488 gregs
= va_arg (ap
, const void *);
491 if (bed
->s
->elfclass
== ELFCLASS32
)
493 if (bed
->elf_machine_code
== EM_X86_64
)
495 prstatusx32_t 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
));
506 memset (&prstat
, 0, sizeof (prstat
));
508 prstat
.pr_cursig
= cursig
;
509 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
510 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
511 &prstat
, sizeof (prstat
));
517 memset (&prstat
, 0, sizeof (prstat
));
519 prstat
.pr_cursig
= cursig
;
520 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
521 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
522 &prstat
, sizeof (prstat
));
529 /* Functions for the x86-64 ELF linker. */
531 /* The name of the dynamic interpreter. This is put in the .interp
534 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
535 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
537 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
538 copying dynamic variables from a shared lib into an app's dynbss
539 section, and instead use a dynamic relocation to point into the
541 #define ELIMINATE_COPY_RELOCS 1
543 /* The size in bytes of an entry in the global offset table. */
545 #define GOT_ENTRY_SIZE 8
547 /* The size in bytes of an entry in the lazy procedure linkage table. */
549 #define LAZY_PLT_ENTRY_SIZE 16
551 /* The size in bytes of an entry in the non-lazy procedure linkage
554 #define NON_LAZY_PLT_ENTRY_SIZE 8
556 /* The first entry in a lazy procedure linkage table looks like this.
557 See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this
560 static const bfd_byte elf_x86_64_lazy_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
562 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
563 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
564 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
567 /* Subsequent entries in a lazy procedure linkage table look like this. */
569 static const bfd_byte elf_x86_64_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
571 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
572 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
573 0x68, /* pushq immediate */
574 0, 0, 0, 0, /* replaced with index into relocation table. */
575 0xe9, /* jmp relative */
576 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
579 /* The first entry in a lazy procedure linkage table with BND prefix
582 static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
584 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
585 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
586 0x0f, 0x1f, 0 /* nopl (%rax) */
589 /* Subsequent entries for branches with BND prefx in a lazy procedure
590 linkage table look like this. */
592 static const bfd_byte elf_x86_64_lazy_bnd_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
594 0x68, 0, 0, 0, 0, /* pushq immediate */
595 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
596 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
599 /* The first entry in the IBT-enabled lazy procedure linkage table is the
600 the same as the lazy PLT with BND prefix so that bound registers are
601 preserved when control is passed to dynamic linker. Subsequent
602 entries for a IBT-enabled lazy procedure linkage table look like
605 static const bfd_byte elf_x86_64_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
607 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
608 0x68, 0, 0, 0, 0, /* pushq immediate */
609 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
613 /* The first entry in the x32 IBT-enabled lazy procedure linkage table
614 is the the same as the normal lazy PLT. Subsequent entries for an
615 x32 IBT-enabled lazy procedure linkage table look like this. */
617 static const bfd_byte elf_x32_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
619 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
620 0x68, 0, 0, 0, 0, /* pushq immediate */
621 0xe9, 0, 0, 0, 0, /* jmpq relative */
622 0x66, 0x90 /* xchg %ax,%ax */
625 /* Entries in the non-lazey procedure linkage table look like this. */
627 static const bfd_byte elf_x86_64_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
629 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
630 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
631 0x66, 0x90 /* xchg %ax,%ax */
634 /* Entries for branches with BND prefix in the non-lazey procedure
635 linkage table look like this. */
637 static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
639 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
640 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
644 /* Entries for branches with IBT-enabled in the non-lazey procedure
645 linkage table look like this. They have the same size as the lazy
648 static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
650 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
651 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
652 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */
656 /* Entries for branches with IBT-enabled in the x32 non-lazey procedure
657 linkage table look like this. They have the same size as the lazy
660 static const bfd_byte elf_x32_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
662 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
663 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
664 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
665 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
668 /* .eh_frame covering the lazy .plt section. */
670 static const bfd_byte elf_x86_64_eh_frame_lazy_plt
[] =
672 #define PLT_CIE_LENGTH 20
673 #define PLT_FDE_LENGTH 36
674 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
675 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
676 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
677 0, 0, 0, 0, /* CIE ID */
679 'z', 'R', 0, /* Augmentation string */
680 1, /* Code alignment factor */
681 0x78, /* Data alignment factor */
682 16, /* Return address column */
683 1, /* Augmentation size */
684 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
685 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
686 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
687 DW_CFA_nop
, DW_CFA_nop
,
689 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
690 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
691 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
692 0, 0, 0, 0, /* .plt size goes here */
693 0, /* Augmentation size */
694 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
695 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
696 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
697 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
698 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
699 11, /* Block length */
700 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
701 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
702 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
703 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
704 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
707 /* .eh_frame covering the lazy BND .plt section. */
709 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt
[] =
711 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
712 0, 0, 0, 0, /* CIE ID */
714 'z', 'R', 0, /* Augmentation string */
715 1, /* Code alignment factor */
716 0x78, /* Data alignment factor */
717 16, /* Return address column */
718 1, /* Augmentation size */
719 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
720 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
721 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
722 DW_CFA_nop
, DW_CFA_nop
,
724 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
725 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
726 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
727 0, 0, 0, 0, /* .plt size goes here */
728 0, /* Augmentation size */
729 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
730 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
731 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
732 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
733 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
734 11, /* Block length */
735 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
736 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
737 DW_OP_lit15
, DW_OP_and
, DW_OP_lit5
, DW_OP_ge
,
738 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
739 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
742 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
744 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt
[] =
746 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
747 0, 0, 0, 0, /* CIE ID */
749 'z', 'R', 0, /* Augmentation string */
750 1, /* Code alignment factor */
751 0x78, /* Data alignment factor */
752 16, /* Return address column */
753 1, /* Augmentation size */
754 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
755 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
756 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
757 DW_CFA_nop
, DW_CFA_nop
,
759 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
760 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
761 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
762 0, 0, 0, 0, /* .plt size goes here */
763 0, /* Augmentation size */
764 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
765 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
766 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
767 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
768 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
769 11, /* Block length */
770 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
771 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
772 DW_OP_lit15
, DW_OP_and
, DW_OP_lit10
, DW_OP_ge
,
773 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
774 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
777 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
779 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt
[] =
781 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
782 0, 0, 0, 0, /* CIE ID */
784 'z', 'R', 0, /* Augmentation string */
785 1, /* Code alignment factor */
786 0x78, /* Data alignment factor */
787 16, /* Return address column */
788 1, /* Augmentation size */
789 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
790 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
791 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
792 DW_CFA_nop
, DW_CFA_nop
,
794 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
795 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
796 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
797 0, 0, 0, 0, /* .plt size goes here */
798 0, /* Augmentation size */
799 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
800 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
801 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
802 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
803 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
804 11, /* Block length */
805 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
806 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
807 DW_OP_lit15
, DW_OP_and
, DW_OP_lit9
, DW_OP_ge
,
808 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
809 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
812 /* .eh_frame covering the non-lazy .plt section. */
814 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt
[] =
816 #define PLT_GOT_FDE_LENGTH 20
817 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
818 0, 0, 0, 0, /* CIE ID */
820 'z', 'R', 0, /* Augmentation string */
821 1, /* Code alignment factor */
822 0x78, /* Data alignment factor */
823 16, /* Return address column */
824 1, /* Augmentation size */
825 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
826 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
827 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
828 DW_CFA_nop
, DW_CFA_nop
,
830 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
831 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
832 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
833 0, 0, 0, 0, /* non-lazy .plt size goes here */
834 0, /* Augmentation size */
835 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
,
836 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
839 struct elf_x86_64_lazy_plt_layout
841 /* Templates for the initial PLT entry and for subsequent entries. */
842 const bfd_byte
*plt0_entry
;
843 const bfd_byte
*plt_entry
;
844 unsigned int plt_entry_size
; /* Size of each PLT entry. */
846 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
847 unsigned int plt0_got1_offset
;
848 unsigned int plt0_got2_offset
;
850 /* Offset of the end of the PC-relative instruction containing
852 unsigned int plt0_got2_insn_end
;
854 /* Offsets into plt_entry that are to be replaced with... */
855 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
856 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
857 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
859 /* Length of the PC-relative instruction containing plt_got_offset. */
860 unsigned int plt_got_insn_size
;
862 /* Offset of the end of the PC-relative jump to plt0_entry. */
863 unsigned int plt_plt_insn_end
;
865 /* Offset into plt_entry where the initial value of the GOT entry points. */
866 unsigned int plt_lazy_offset
;
868 /* .eh_frame covering the lazy .plt section. */
869 const bfd_byte
*eh_frame_plt
;
870 unsigned int eh_frame_plt_size
;
873 struct elf_x86_64_non_lazy_plt_layout
875 /* Template for the lazy PLT entries. */
876 const bfd_byte
*plt_entry
;
877 unsigned int plt_entry_size
; /* Size of each PLT entry. */
879 /* Offsets into plt_entry that are to be replaced with... */
880 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
882 /* Length of the PC-relative instruction containing plt_got_offset. */
883 unsigned int plt_got_insn_size
;
885 /* .eh_frame covering the non-lazy .plt section. */
886 const bfd_byte
*eh_frame_plt
;
887 unsigned int eh_frame_plt_size
;
890 struct elf_x86_64_plt_layout
892 /* Template for the PLT entries. */
893 const bfd_byte
*plt_entry
;
894 unsigned int plt_entry_size
; /* Size of each PLT entry. */
897 unsigned int has_plt0
;
899 /* Offsets into plt_entry that are to be replaced with... */
900 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
902 /* Length of the PC-relative instruction containing plt_got_offset. */
903 unsigned int plt_got_insn_size
;
905 /* .eh_frame covering the .plt section. */
906 const bfd_byte
*eh_frame_plt
;
907 unsigned int eh_frame_plt_size
;
910 /* Architecture-specific backend data for x86-64. */
912 struct elf_x86_64_backend_data
922 #define get_elf_x86_64_arch_data(bed) \
923 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
925 #define get_elf_x86_64_backend_data(abfd) \
926 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
928 /* These are the standard parameters. */
929 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_plt
=
931 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
932 elf_x86_64_lazy_plt_entry
, /* plt_entry */
933 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
934 2, /* plt0_got1_offset */
935 8, /* plt0_got2_offset */
936 12, /* plt0_got2_insn_end */
937 2, /* plt_got_offset */
938 7, /* plt_reloc_offset */
939 12, /* plt_plt_offset */
940 6, /* plt_got_insn_size */
941 LAZY_PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
942 6, /* plt_lazy_offset */
943 elf_x86_64_eh_frame_lazy_plt
, /* eh_frame_plt */
944 sizeof (elf_x86_64_eh_frame_lazy_plt
) /* eh_frame_plt_size */
947 static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_plt
=
949 elf_x86_64_non_lazy_plt_entry
, /* plt_entry */
950 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
951 2, /* plt_got_offset */
952 6, /* plt_got_insn_size */
953 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
954 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
957 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_bnd_plt
=
959 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
960 elf_x86_64_lazy_bnd_plt_entry
, /* plt_entry */
961 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
962 2, /* plt0_got1_offset */
963 1+8, /* plt0_got2_offset */
964 1+12, /* plt0_got2_insn_end */
965 1+2, /* plt_got_offset */
966 1, /* plt_reloc_offset */
967 7, /* plt_plt_offset */
968 1+6, /* plt_got_insn_size */
969 11, /* plt_plt_insn_end */
970 0, /* plt_lazy_offset */
971 elf_x86_64_eh_frame_lazy_bnd_plt
, /* eh_frame_plt */
972 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt
) /* eh_frame_plt_size */
975 static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt
=
977 elf_x86_64_non_lazy_bnd_plt_entry
, /* plt_entry */
978 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
979 1+2, /* plt_got_offset */
980 1+6, /* plt_got_insn_size */
981 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
982 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
985 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_ibt_plt
=
987 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
988 elf_x86_64_lazy_ibt_plt_entry
, /* plt_entry */
989 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
990 2, /* plt0_got1_offset */
991 1+8, /* plt0_got2_offset */
992 1+12, /* plt0_got2_insn_end */
993 4+1+2, /* plt_got_offset */
994 4+1, /* plt_reloc_offset */
995 4+1+6, /* plt_plt_offset */
996 4+1+6, /* plt_got_insn_size */
997 4+1+5+5, /* plt_plt_insn_end */
998 0, /* plt_lazy_offset */
999 elf_x86_64_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
1000 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
1003 static const struct elf_x86_64_lazy_plt_layout elf_x32_lazy_ibt_plt
=
1005 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
1006 elf_x32_lazy_ibt_plt_entry
, /* plt_entry */
1007 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
1008 2, /* plt0_got1_offset */
1009 8, /* plt0_got2_offset */
1010 12, /* plt0_got2_insn_end */
1011 4+2, /* plt_got_offset */
1012 4+1, /* plt_reloc_offset */
1013 4+6, /* plt_plt_offset */
1014 4+6, /* plt_got_insn_size */
1015 4+5+5, /* plt_plt_insn_end */
1016 0, /* plt_lazy_offset */
1017 elf_x32_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
1018 sizeof (elf_x32_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
1021 static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt
=
1023 elf_x86_64_non_lazy_ibt_plt_entry
, /* plt_entry */
1024 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
1025 4+1+2, /* plt_got_offset */
1026 4+1+6, /* plt_got_insn_size */
1027 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
1028 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
1031 static const struct elf_x86_64_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt
=
1033 elf_x32_non_lazy_ibt_plt_entry
, /* plt_entry */
1034 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
1035 4+2, /* plt_got_offset */
1036 4+6, /* plt_got_insn_size */
1037 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
1038 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
1041 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
1046 #define elf_backend_arch_data &elf_x86_64_arch_bed
1048 /* Is a undefined weak symbol which is resolved to 0. Reference to an
1049 undefined weak symbol is resolved to 0 when building executable if
1050 it isn't dynamic and
1051 1. Has non-GOT/non-PLT relocations in text section. Or
1052 2. Has no GOT/PLT relocation.
1053 Local undefined weak symbol is always resolved to 0.
1055 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
1056 ((EH)->elf.root.type == bfd_link_hash_undefweak \
1057 && ((EH)->elf.forced_local \
1058 || (bfd_link_executable (INFO) \
1059 && (elf_x86_64_hash_table (INFO)->interp == NULL \
1061 || (EH)->has_non_got_reloc \
1062 || !(INFO)->dynamic_undefined_weak))))
1064 /* x86-64 ELF linker hash entry. */
1066 struct elf_x86_64_link_hash_entry
1068 struct elf_link_hash_entry elf
;
1070 /* Track dynamic relocs copied for this symbol. */
1071 struct elf_dyn_relocs
*dyn_relocs
;
1073 #define GOT_UNKNOWN 0
1074 #define GOT_NORMAL 1
1075 #define GOT_TLS_GD 2
1076 #define GOT_TLS_IE 3
1077 #define GOT_TLS_GDESC 4
1078 #define GOT_TLS_GD_BOTH_P(type) \
1079 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
1080 #define GOT_TLS_GD_P(type) \
1081 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
1082 #define GOT_TLS_GDESC_P(type) \
1083 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
1084 #define GOT_TLS_GD_ANY_P(type) \
1085 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
1086 unsigned char tls_type
;
1088 /* TRUE if a weak symbol with a real definition needs a copy reloc.
1089 When there is a weak symbol with a real definition, the processor
1090 independent code will have arranged for us to see the real
1091 definition first. We need to copy the needs_copy bit from the
1092 real definition and check it when allowing copy reloc in PIE. */
1093 unsigned int needs_copy
: 1;
1095 /* TRUE if symbol has GOT or PLT relocations. */
1096 unsigned int has_got_reloc
: 1;
1098 /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */
1099 unsigned int has_non_got_reloc
: 1;
1101 /* Don't call finish_dynamic_symbol on this symbol. */
1102 unsigned int no_finish_dynamic_symbol
: 1;
1104 /* 0: symbol isn't __tls_get_addr.
1105 1: symbol is __tls_get_addr.
1106 2: symbol is unknown. */
1107 unsigned int tls_get_addr
: 2;
1109 /* Reference count of C/C++ function pointer relocations in read-write
1110 section which can be resolved at run-time. */
1111 bfd_signed_vma func_pointer_refcount
;
1113 /* Information about the GOT PLT entry. Filled when there are both
1114 GOT and PLT relocations against the same function. */
1115 union gotplt_union plt_got
;
1117 /* Information about the second PLT entry. */
1118 union gotplt_union plt_second
;
1120 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
1121 starting at the end of the jump table. */
1122 bfd_vma tlsdesc_got
;
1125 #define elf_x86_64_hash_entry(ent) \
1126 ((struct elf_x86_64_link_hash_entry *)(ent))
1128 struct elf_x86_64_obj_tdata
1130 struct elf_obj_tdata root
;
1132 /* tls_type for each local got entry. */
1133 char *local_got_tls_type
;
1135 /* GOTPLT entries for TLS descriptors. */
1136 bfd_vma
*local_tlsdesc_gotent
;
1139 #define elf_x86_64_tdata(abfd) \
1140 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
1142 #define elf_x86_64_local_got_tls_type(abfd) \
1143 (elf_x86_64_tdata (abfd)->local_got_tls_type)
1145 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
1146 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
1148 #define is_x86_64_elf(bfd) \
1149 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1150 && elf_tdata (bfd) != NULL \
1151 && elf_object_id (bfd) == X86_64_ELF_DATA)
1154 elf_x86_64_mkobject (bfd
*abfd
)
1156 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_x86_64_obj_tdata
),
1160 /* x86-64 ELF linker hash table. */
1162 struct elf_x86_64_link_hash_table
1164 struct elf_link_hash_table elf
;
1166 /* Short-cuts to get to dynamic linker sections. */
1168 asection
*plt_eh_frame
;
1169 asection
*plt_second
;
1170 asection
*plt_second_eh_frame
;
1172 asection
*plt_got_eh_frame
;
1174 /* Parameters describing PLT generation, lazy or non-lazy. */
1175 struct elf_x86_64_plt_layout plt
;
1177 /* Parameters describing lazy PLT generation. */
1178 const struct elf_x86_64_lazy_plt_layout
*lazy_plt
;
1180 /* Parameters describing non-lazy PLT generation. */
1181 const struct elf_x86_64_non_lazy_plt_layout
*non_lazy_plt
;
1185 bfd_signed_vma refcount
;
1189 /* The amount of space used by the jump slots in the GOT. */
1190 bfd_vma sgotplt_jump_table_size
;
1192 /* Small local sym cache. */
1193 struct sym_cache sym_cache
;
1195 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
1196 bfd_vma (*r_sym
) (bfd_vma
);
1197 unsigned int pointer_r_type
;
1198 const char *dynamic_interpreter
;
1199 int dynamic_interpreter_size
;
1201 /* _TLS_MODULE_BASE_ symbol. */
1202 struct bfd_link_hash_entry
*tls_module_base
;
1204 /* Used by local STT_GNU_IFUNC symbols. */
1205 htab_t loc_hash_table
;
1206 void * loc_hash_memory
;
1208 /* The offset into splt of the PLT entry for the TLS descriptor
1209 resolver. Special values are 0, if not necessary (or not found
1210 to be necessary yet), and -1 if needed but not determined
1212 bfd_vma tlsdesc_plt
;
1213 /* The offset into sgot of the GOT entry used by the PLT entry
1215 bfd_vma tlsdesc_got
;
1217 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
1218 bfd_vma next_jump_slot_index
;
1219 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
1220 bfd_vma next_irelative_index
;
1222 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
1223 to read-only sections. */
1224 bfd_boolean readonly_dynrelocs_against_ifunc
;
1227 /* Get the x86-64 ELF linker hash table from a link_info structure. */
1229 #define elf_x86_64_hash_table(p) \
1230 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
1231 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
1233 #define elf_x86_64_compute_jump_table_size(htab) \
1234 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
1236 /* Create an entry in an x86-64 ELF linker hash table. */
1238 static struct bfd_hash_entry
*
1239 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1240 struct bfd_hash_table
*table
,
1243 /* Allocate the structure if it has not already been allocated by a
1247 entry
= (struct bfd_hash_entry
*)
1248 bfd_hash_allocate (table
,
1249 sizeof (struct elf_x86_64_link_hash_entry
));
1254 /* Call the allocation method of the superclass. */
1255 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
1258 struct elf_x86_64_link_hash_entry
*eh
;
1260 eh
= (struct elf_x86_64_link_hash_entry
*) entry
;
1261 eh
->dyn_relocs
= NULL
;
1262 eh
->tls_type
= GOT_UNKNOWN
;
1264 eh
->has_got_reloc
= 0;
1265 eh
->has_non_got_reloc
= 0;
1266 eh
->no_finish_dynamic_symbol
= 0;
1267 eh
->tls_get_addr
= 2;
1268 eh
->func_pointer_refcount
= 0;
1269 eh
->plt_second
.offset
= (bfd_vma
) -1;
1270 eh
->plt_got
.offset
= (bfd_vma
) -1;
1271 eh
->tlsdesc_got
= (bfd_vma
) -1;
1277 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1278 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1279 as global symbol. We reuse indx and dynstr_index for local symbol
1280 hash since they aren't used by global symbols in this backend. */
1283 elf_x86_64_local_htab_hash (const void *ptr
)
1285 struct elf_link_hash_entry
*h
1286 = (struct elf_link_hash_entry
*) ptr
;
1287 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
1290 /* Compare local hash entries. */
1293 elf_x86_64_local_htab_eq (const void *ptr1
, const void *ptr2
)
1295 struct elf_link_hash_entry
*h1
1296 = (struct elf_link_hash_entry
*) ptr1
;
1297 struct elf_link_hash_entry
*h2
1298 = (struct elf_link_hash_entry
*) ptr2
;
1300 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
1303 /* Find and/or create a hash entry for local symbol. */
1305 static struct elf_link_hash_entry
*
1306 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table
*htab
,
1307 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
1310 struct elf_x86_64_link_hash_entry e
, *ret
;
1311 asection
*sec
= abfd
->sections
;
1312 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
1313 htab
->r_sym (rel
->r_info
));
1316 e
.elf
.indx
= sec
->id
;
1317 e
.elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
1318 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
1319 create
? INSERT
: NO_INSERT
);
1326 ret
= (struct elf_x86_64_link_hash_entry
*) *slot
;
1330 ret
= (struct elf_x86_64_link_hash_entry
*)
1331 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
1332 sizeof (struct elf_x86_64_link_hash_entry
));
1335 memset (ret
, 0, sizeof (*ret
));
1336 ret
->elf
.indx
= sec
->id
;
1337 ret
->elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
1338 ret
->elf
.dynindx
= -1;
1339 ret
->func_pointer_refcount
= 0;
1340 ret
->plt_got
.offset
= (bfd_vma
) -1;
1346 /* Destroy an X86-64 ELF linker hash table. */
1349 elf_x86_64_link_hash_table_free (bfd
*obfd
)
1351 struct elf_x86_64_link_hash_table
*htab
1352 = (struct elf_x86_64_link_hash_table
*) obfd
->link
.hash
;
1354 if (htab
->loc_hash_table
)
1355 htab_delete (htab
->loc_hash_table
);
1356 if (htab
->loc_hash_memory
)
1357 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
1358 _bfd_elf_link_hash_table_free (obfd
);
1361 /* Create an X86-64 ELF linker hash table. */
1363 static struct bfd_link_hash_table
*
1364 elf_x86_64_link_hash_table_create (bfd
*abfd
)
1366 struct elf_x86_64_link_hash_table
*ret
;
1367 bfd_size_type amt
= sizeof (struct elf_x86_64_link_hash_table
);
1369 ret
= (struct elf_x86_64_link_hash_table
*) bfd_zmalloc (amt
);
1373 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1374 elf_x86_64_link_hash_newfunc
,
1375 sizeof (struct elf_x86_64_link_hash_entry
),
1382 if (ABI_64_P (abfd
))
1384 ret
->r_info
= elf64_r_info
;
1385 ret
->r_sym
= elf64_r_sym
;
1386 ret
->pointer_r_type
= R_X86_64_64
;
1387 ret
->dynamic_interpreter
= ELF64_DYNAMIC_INTERPRETER
;
1388 ret
->dynamic_interpreter_size
= sizeof ELF64_DYNAMIC_INTERPRETER
;
1392 ret
->r_info
= elf32_r_info
;
1393 ret
->r_sym
= elf32_r_sym
;
1394 ret
->pointer_r_type
= R_X86_64_32
;
1395 ret
->dynamic_interpreter
= ELF32_DYNAMIC_INTERPRETER
;
1396 ret
->dynamic_interpreter_size
= sizeof ELF32_DYNAMIC_INTERPRETER
;
1399 ret
->loc_hash_table
= htab_try_create (1024,
1400 elf_x86_64_local_htab_hash
,
1401 elf_x86_64_local_htab_eq
,
1403 ret
->loc_hash_memory
= objalloc_create ();
1404 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1406 elf_x86_64_link_hash_table_free (abfd
);
1409 ret
->elf
.root
.hash_table_free
= elf_x86_64_link_hash_table_free
;
1411 return &ret
->elf
.root
;
1414 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1417 elf_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
1418 struct elf_link_hash_entry
*dir
,
1419 struct elf_link_hash_entry
*ind
)
1421 struct elf_x86_64_link_hash_entry
*edir
, *eind
;
1423 edir
= (struct elf_x86_64_link_hash_entry
*) dir
;
1424 eind
= (struct elf_x86_64_link_hash_entry
*) ind
;
1426 edir
->has_got_reloc
|= eind
->has_got_reloc
;
1427 edir
->has_non_got_reloc
|= eind
->has_non_got_reloc
;
1429 if (eind
->dyn_relocs
!= NULL
)
1431 if (edir
->dyn_relocs
!= NULL
)
1433 struct elf_dyn_relocs
**pp
;
1434 struct elf_dyn_relocs
*p
;
1436 /* Add reloc counts against the indirect sym to the direct sym
1437 list. Merge any entries against the same section. */
1438 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1440 struct elf_dyn_relocs
*q
;
1442 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1443 if (q
->sec
== p
->sec
)
1445 q
->pc_count
+= p
->pc_count
;
1446 q
->count
+= p
->count
;
1453 *pp
= edir
->dyn_relocs
;
1456 edir
->dyn_relocs
= eind
->dyn_relocs
;
1457 eind
->dyn_relocs
= NULL
;
1460 if (ind
->root
.type
== bfd_link_hash_indirect
1461 && dir
->got
.refcount
<= 0)
1463 edir
->tls_type
= eind
->tls_type
;
1464 eind
->tls_type
= GOT_UNKNOWN
;
1467 if (ELIMINATE_COPY_RELOCS
1468 && ind
->root
.type
!= bfd_link_hash_indirect
1469 && dir
->dynamic_adjusted
)
1471 /* If called to transfer flags for a weakdef during processing
1472 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1473 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1474 if (dir
->versioned
!= versioned_hidden
)
1475 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1476 dir
->ref_regular
|= ind
->ref_regular
;
1477 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1478 dir
->needs_plt
|= ind
->needs_plt
;
1479 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1483 if (eind
->func_pointer_refcount
> 0)
1485 edir
->func_pointer_refcount
+= eind
->func_pointer_refcount
;
1486 eind
->func_pointer_refcount
= 0;
1489 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1494 elf64_x86_64_elf_object_p (bfd
*abfd
)
1496 /* Set the right machine number for an x86-64 elf64 file. */
1497 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1502 elf32_x86_64_elf_object_p (bfd
*abfd
)
1504 /* Set the right machine number for an x86-64 elf32 file. */
1505 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1509 /* Return TRUE if the TLS access code sequence support transition
1513 elf_x86_64_check_tls_transition (bfd
*abfd
,
1514 struct bfd_link_info
*info
,
1517 Elf_Internal_Shdr
*symtab_hdr
,
1518 struct elf_link_hash_entry
**sym_hashes
,
1519 unsigned int r_type
,
1520 const Elf_Internal_Rela
*rel
,
1521 const Elf_Internal_Rela
*relend
)
1524 unsigned long r_symndx
;
1525 bfd_boolean largepic
= FALSE
;
1526 struct elf_link_hash_entry
*h
;
1528 struct elf_x86_64_link_hash_table
*htab
;
1530 bfd_boolean indirect_call
, tls_get_addr
;
1532 htab
= elf_x86_64_hash_table (info
);
1533 offset
= rel
->r_offset
;
1536 case R_X86_64_TLSGD
:
1537 case R_X86_64_TLSLD
:
1538 if ((rel
+ 1) >= relend
)
1541 if (r_type
== R_X86_64_TLSGD
)
1543 /* Check transition from GD access model. For 64bit, only
1544 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1545 .word 0x6666; rex64; call __tls_get_addr@PLT
1547 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1549 call *__tls_get_addr@GOTPCREL(%rip)
1550 which may be converted to
1551 addr32 call __tls_get_addr
1552 can transit to different access model. For 32bit, only
1553 leaq foo@tlsgd(%rip), %rdi
1554 .word 0x6666; rex64; call __tls_get_addr@PLT
1556 leaq foo@tlsgd(%rip), %rdi
1558 call *__tls_get_addr@GOTPCREL(%rip)
1559 which may be converted to
1560 addr32 call __tls_get_addr
1561 can transit to different access model. For largepic,
1563 leaq foo@tlsgd(%rip), %rdi
1564 movabsq $__tls_get_addr@pltoff, %rax
1568 leaq foo@tlsgd(%rip), %rdi
1569 movabsq $__tls_get_addr@pltoff, %rax
1573 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1575 if ((offset
+ 12) > sec
->size
)
1578 call
= contents
+ offset
+ 4;
1580 || !((call
[1] == 0x48
1588 && call
[3] == 0xe8)))
1590 if (!ABI_64_P (abfd
)
1591 || (offset
+ 19) > sec
->size
1593 || memcmp (call
- 7, leaq
+ 1, 3) != 0
1594 || memcmp (call
, "\x48\xb8", 2) != 0
1598 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1599 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1603 else if (ABI_64_P (abfd
))
1606 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1612 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1615 indirect_call
= call
[2] == 0xff;
1619 /* Check transition from LD access model. Only
1620 leaq foo@tlsld(%rip), %rdi;
1621 call __tls_get_addr@PLT
1623 leaq foo@tlsld(%rip), %rdi;
1624 call *__tls_get_addr@GOTPCREL(%rip)
1625 which may be converted to
1626 addr32 call __tls_get_addr
1627 can transit to different access model. For largepic
1629 leaq foo@tlsld(%rip), %rdi
1630 movabsq $__tls_get_addr@pltoff, %rax
1634 leaq foo@tlsld(%rip), %rdi
1635 movabsq $__tls_get_addr@pltoff, %rax
1639 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1641 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1644 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1647 call
= contents
+ offset
+ 4;
1648 if (!(call
[0] == 0xe8
1649 || (call
[0] == 0xff && call
[1] == 0x15)
1650 || (call
[0] == 0x67 && call
[1] == 0xe8)))
1652 if (!ABI_64_P (abfd
)
1653 || (offset
+ 19) > sec
->size
1654 || memcmp (call
, "\x48\xb8", 2) != 0
1658 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1659 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1663 indirect_call
= call
[0] == 0xff;
1666 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1667 if (r_symndx
< symtab_hdr
->sh_info
)
1670 tls_get_addr
= FALSE
;
1671 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1672 if (h
!= NULL
&& h
->root
.root
.string
!= NULL
)
1674 struct elf_x86_64_link_hash_entry
*eh
1675 = (struct elf_x86_64_link_hash_entry
*) h
;
1676 tls_get_addr
= eh
->tls_get_addr
== 1;
1677 if (eh
->tls_get_addr
> 1)
1679 /* Use strncmp to check __tls_get_addr since
1680 __tls_get_addr may be versioned. */
1681 if (strncmp (h
->root
.root
.string
, "__tls_get_addr", 14)
1684 eh
->tls_get_addr
= 1;
1685 tls_get_addr
= TRUE
;
1688 eh
->tls_get_addr
= 0;
1695 return ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLTOFF64
;
1696 else if (indirect_call
)
1697 return ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_GOTPCRELX
;
1699 return (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1700 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
);
1702 case R_X86_64_GOTTPOFF
:
1703 /* Check transition from IE access model:
1704 mov foo@gottpoff(%rip), %reg
1705 add foo@gottpoff(%rip), %reg
1708 /* Check REX prefix first. */
1709 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1711 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1712 if (val
!= 0x48 && val
!= 0x4c)
1714 /* X32 may have 0x44 REX prefix or no REX prefix. */
1715 if (ABI_64_P (abfd
))
1721 /* X32 may not have any REX prefix. */
1722 if (ABI_64_P (abfd
))
1724 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1728 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1729 if (val
!= 0x8b && val
!= 0x03)
1732 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1733 return (val
& 0xc7) == 5;
1735 case R_X86_64_GOTPC32_TLSDESC
:
1736 /* Check transition from GDesc access model:
1737 leaq x@tlsdesc(%rip), %rax
1739 Make sure it's a leaq adding rip to a 32-bit offset
1740 into any register, although it's probably almost always
1743 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1746 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1747 if ((val
& 0xfb) != 0x48)
1750 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1753 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1754 return (val
& 0xc7) == 0x05;
1756 case R_X86_64_TLSDESC_CALL
:
1757 /* Check transition from GDesc access model:
1758 call *x@tlsdesc(%rax)
1760 if (offset
+ 2 <= sec
->size
)
1762 /* Make sure that it's a call *x@tlsdesc(%rax). */
1763 call
= contents
+ offset
;
1764 return call
[0] == 0xff && call
[1] == 0x10;
1774 /* Return TRUE if the TLS access transition is OK or no transition
1775 will be performed. Update R_TYPE if there is a transition. */
1778 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1779 asection
*sec
, bfd_byte
*contents
,
1780 Elf_Internal_Shdr
*symtab_hdr
,
1781 struct elf_link_hash_entry
**sym_hashes
,
1782 unsigned int *r_type
, int tls_type
,
1783 const Elf_Internal_Rela
*rel
,
1784 const Elf_Internal_Rela
*relend
,
1785 struct elf_link_hash_entry
*h
,
1786 unsigned long r_symndx
,
1787 bfd_boolean from_relocate_section
)
1789 unsigned int from_type
= *r_type
;
1790 unsigned int to_type
= from_type
;
1791 bfd_boolean check
= TRUE
;
1793 /* Skip TLS transition for functions. */
1795 && (h
->type
== STT_FUNC
1796 || h
->type
== STT_GNU_IFUNC
))
1801 case R_X86_64_TLSGD
:
1802 case R_X86_64_GOTPC32_TLSDESC
:
1803 case R_X86_64_TLSDESC_CALL
:
1804 case R_X86_64_GOTTPOFF
:
1805 if (bfd_link_executable (info
))
1808 to_type
= R_X86_64_TPOFF32
;
1810 to_type
= R_X86_64_GOTTPOFF
;
1813 /* When we are called from elf_x86_64_relocate_section, there may
1814 be additional transitions based on TLS_TYPE. */
1815 if (from_relocate_section
)
1817 unsigned int new_to_type
= to_type
;
1819 if (bfd_link_executable (info
)
1822 && tls_type
== GOT_TLS_IE
)
1823 new_to_type
= R_X86_64_TPOFF32
;
1825 if (to_type
== R_X86_64_TLSGD
1826 || to_type
== R_X86_64_GOTPC32_TLSDESC
1827 || to_type
== R_X86_64_TLSDESC_CALL
)
1829 if (tls_type
== GOT_TLS_IE
)
1830 new_to_type
= R_X86_64_GOTTPOFF
;
1833 /* We checked the transition before when we were called from
1834 elf_x86_64_check_relocs. We only want to check the new
1835 transition which hasn't been checked before. */
1836 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1837 to_type
= new_to_type
;
1842 case R_X86_64_TLSLD
:
1843 if (bfd_link_executable (info
))
1844 to_type
= R_X86_64_TPOFF32
;
1851 /* Return TRUE if there is no transition. */
1852 if (from_type
== to_type
)
1855 /* Check if the transition can be performed. */
1857 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1858 symtab_hdr
, sym_hashes
,
1859 from_type
, rel
, relend
))
1861 reloc_howto_type
*from
, *to
;
1864 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1865 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1868 name
= h
->root
.root
.string
;
1871 struct elf_x86_64_link_hash_table
*htab
;
1873 htab
= elf_x86_64_hash_table (info
);
1878 Elf_Internal_Sym
*isym
;
1880 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1882 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1887 /* xgettext:c-format */
1888 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1889 "in section `%A' failed"),
1890 abfd
, from
->name
, to
->name
, name
,
1891 (unsigned long) rel
->r_offset
, sec
);
1892 bfd_set_error (bfd_error_bad_value
);
1900 /* Rename some of the generic section flags to better document how they
1902 #define need_convert_load sec_flg0
1903 #define check_relocs_failed sec_flg1
1906 elf_x86_64_need_pic (bfd
*input_bfd
, asection
*sec
,
1907 struct elf_link_hash_entry
*h
,
1908 Elf_Internal_Shdr
*symtab_hdr
,
1909 Elf_Internal_Sym
*isym
,
1910 reloc_howto_type
*howto
)
1913 const char *und
= "";
1914 const char *pic
= "";
1919 name
= h
->root
.root
.string
;
1920 switch (ELF_ST_VISIBILITY (h
->other
))
1923 v
= _("hidden symbol ");
1926 v
= _("internal symbol ");
1929 v
= _("protected symbol ");
1933 pic
= _("; recompile with -fPIC");
1937 if (!h
->def_regular
&& !h
->def_dynamic
)
1938 und
= _("undefined ");
1942 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, isym
, NULL
);
1943 pic
= _("; recompile with -fPIC");
1946 /* xgettext:c-format */
1947 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1948 "not be used when making a shared object%s"),
1949 input_bfd
, howto
->name
, und
, v
, name
, pic
);
1950 bfd_set_error (bfd_error_bad_value
);
1951 sec
->check_relocs_failed
= 1;
1955 /* With the local symbol, foo, we convert
1956 mov foo@GOTPCREL(%rip), %reg
1960 call/jmp *foo@GOTPCREL(%rip)
1962 nop call foo/jmp foo nop
1963 When PIC is false, convert
1964 test %reg, foo@GOTPCREL(%rip)
1968 binop foo@GOTPCREL(%rip), %reg
1971 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1975 elf_x86_64_convert_load_reloc (bfd
*abfd
, asection
*sec
,
1977 Elf_Internal_Rela
*irel
,
1978 struct elf_link_hash_entry
*h
,
1979 bfd_boolean
*converted
,
1980 struct bfd_link_info
*link_info
)
1982 struct elf_x86_64_link_hash_table
*htab
;
1984 bfd_boolean require_reloc_pc32
;
1986 bfd_boolean to_reloc_pc32
;
1989 bfd_signed_vma raddend
;
1990 unsigned int opcode
;
1992 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
1993 unsigned int r_symndx
;
1995 bfd_vma roff
= irel
->r_offset
;
1997 if (roff
< (r_type
== R_X86_64_REX_GOTPCRELX
? 3 : 2))
2000 raddend
= irel
->r_addend
;
2001 /* Addend for 32-bit PC-relative relocation must be -4. */
2005 htab
= elf_x86_64_hash_table (link_info
);
2006 is_pic
= bfd_link_pic (link_info
);
2008 relocx
= (r_type
== R_X86_64_GOTPCRELX
2009 || r_type
== R_X86_64_REX_GOTPCRELX
);
2011 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
2014 = link_info
->disable_target_specific_optimizations
> 1;
2016 r_symndx
= htab
->r_sym (irel
->r_info
);
2018 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
2020 /* Convert mov to lea since it has been done for a while. */
2023 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
2024 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
2025 test, xor instructions. */
2030 /* We convert only to R_X86_64_PC32:
2032 2. R_X86_64_GOTPCREL since we can't modify REX byte.
2033 3. require_reloc_pc32 is true.
2036 to_reloc_pc32
= (opcode
== 0xff
2038 || require_reloc_pc32
2041 /* Get the symbol referred to by the reloc. */
2044 Elf_Internal_Sym
*isym
2045 = bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
, r_symndx
);
2047 /* Skip relocation against undefined symbols. */
2048 if (isym
->st_shndx
== SHN_UNDEF
)
2051 symtype
= ELF_ST_TYPE (isym
->st_info
);
2053 if (isym
->st_shndx
== SHN_ABS
)
2054 tsec
= bfd_abs_section_ptr
;
2055 else if (isym
->st_shndx
== SHN_COMMON
)
2056 tsec
= bfd_com_section_ptr
;
2057 else if (isym
->st_shndx
== SHN_X86_64_LCOMMON
)
2058 tsec
= &_bfd_elf_large_com_section
;
2060 tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2062 toff
= isym
->st_value
;
2066 /* Undefined weak symbol is only bound locally in executable
2067 and its reference is resolved as 0 without relocation
2068 overflow. We can only perform this optimization for
2069 GOTPCRELX relocations since we need to modify REX byte.
2070 It is OK convert mov with R_X86_64_GOTPCREL to
2072 if ((relocx
|| opcode
== 0x8b)
2073 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info
,
2075 elf_x86_64_hash_entry (h
)))
2079 /* Skip for branch instructions since R_X86_64_PC32
2081 if (require_reloc_pc32
)
2086 /* For non-branch instructions, we can convert to
2087 R_X86_64_32/R_X86_64_32S since we know if there
2089 to_reloc_pc32
= FALSE
;
2092 /* Since we don't know the current PC when PIC is true,
2093 we can't convert to R_X86_64_PC32. */
2094 if (to_reloc_pc32
&& is_pic
)
2099 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
2100 ld.so may use its link-time address. */
2101 else if (h
->start_stop
2103 || h
->root
.type
== bfd_link_hash_defined
2104 || h
->root
.type
== bfd_link_hash_defweak
)
2105 && h
!= htab
->elf
.hdynamic
2106 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)))
2108 /* bfd_link_hash_new or bfd_link_hash_undefined is
2109 set by an assignment in a linker script in
2110 bfd_elf_record_link_assignment. start_stop is set
2111 on __start_SECNAME/__stop_SECNAME which mark section
2115 && (h
->root
.type
== bfd_link_hash_new
2116 || h
->root
.type
== bfd_link_hash_undefined
2117 || ((h
->root
.type
== bfd_link_hash_defined
2118 || h
->root
.type
== bfd_link_hash_defweak
)
2119 && h
->root
.u
.def
.section
== bfd_und_section_ptr
))))
2121 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
2122 if (require_reloc_pc32
)
2126 tsec
= h
->root
.u
.def
.section
;
2127 toff
= h
->root
.u
.def
.value
;
2134 /* Don't convert GOTPCREL relocation against large section. */
2135 if (elf_section_data (tsec
) != NULL
2136 && (elf_section_flags (tsec
) & SHF_X86_64_LARGE
) != 0)
2139 /* We can only estimate relocation overflow for R_X86_64_PC32. */
2143 if (tsec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
2145 /* At this stage in linking, no SEC_MERGE symbol has been
2146 adjusted, so all references to such symbols need to be
2147 passed through _bfd_merged_section_offset. (Later, in
2148 relocate_section, all SEC_MERGE symbols *except* for
2149 section symbols have been adjusted.)
2151 gas may reduce relocations against symbols in SEC_MERGE
2152 sections to a relocation against the section symbol when
2153 the original addend was zero. When the reloc is against
2154 a section symbol we should include the addend in the
2155 offset passed to _bfd_merged_section_offset, since the
2156 location of interest is the original symbol. On the
2157 other hand, an access to "sym+addend" where "sym" is not
2158 a section symbol should not include the addend; Such an
2159 access is presumed to be an offset from "sym"; The
2160 location of interest is just "sym". */
2161 if (symtype
== STT_SECTION
)
2164 toff
= _bfd_merged_section_offset (abfd
, &tsec
,
2165 elf_section_data (tsec
)->sec_info
,
2168 if (symtype
!= STT_SECTION
)
2174 /* Don't convert if R_X86_64_PC32 relocation overflows. */
2175 if (tsec
->output_section
== sec
->output_section
)
2177 if ((toff
- roff
+ 0x80000000) > 0xffffffff)
2182 bfd_signed_vma distance
;
2184 /* At this point, we don't know the load addresses of TSEC
2185 section nor SEC section. We estimate the distrance between
2186 SEC and TSEC. We store the estimated distances in the
2187 compressed_size field of the output section, which is only
2188 used to decompress the compressed input section. */
2189 if (sec
->output_section
->compressed_size
== 0)
2192 bfd_size_type size
= 0;
2193 for (asect
= link_info
->output_bfd
->sections
;
2195 asect
= asect
->next
)
2196 /* Skip debug sections since compressed_size is used to
2197 compress debug sections. */
2198 if ((asect
->flags
& SEC_DEBUGGING
) == 0)
2201 for (i
= asect
->map_head
.s
;
2205 size
= align_power (size
, i
->alignment_power
);
2208 asect
->compressed_size
= size
;
2212 /* Don't convert GOTPCREL relocations if TSEC isn't placed
2214 distance
= (tsec
->output_section
->compressed_size
2215 - sec
->output_section
->compressed_size
);
2219 /* Take PT_GNU_RELRO segment into account by adding
2221 if ((toff
+ distance
+ get_elf_backend_data (abfd
)->maxpagesize
2222 - roff
+ 0x80000000) > 0xffffffff)
2229 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
2234 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
2236 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
2239 /* Convert to "jmp foo nop". */
2242 nop_offset
= irel
->r_offset
+ 3;
2243 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
2244 irel
->r_offset
-= 1;
2245 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
2249 struct elf_x86_64_link_hash_entry
*eh
2250 = (struct elf_x86_64_link_hash_entry
*) h
;
2252 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
2255 /* To support TLS optimization, always use addr32 prefix for
2256 "call *__tls_get_addr@GOTPCREL(%rip)". */
2257 if (eh
&& eh
->tls_get_addr
== 1)
2260 nop_offset
= irel
->r_offset
- 2;
2264 nop
= link_info
->call_nop_byte
;
2265 if (link_info
->call_nop_as_suffix
)
2267 nop_offset
= irel
->r_offset
+ 3;
2268 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
2269 irel
->r_offset
-= 1;
2270 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
2273 nop_offset
= irel
->r_offset
- 2;
2276 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
2277 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
2278 r_type
= R_X86_64_PC32
;
2283 unsigned int rex_mask
= REX_R
;
2285 if (r_type
== R_X86_64_REX_GOTPCRELX
)
2286 rex
= bfd_get_8 (abfd
, contents
+ roff
- 3);
2294 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2295 "lea foo(%rip), %reg". */
2297 r_type
= R_X86_64_PC32
;
2301 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2302 "mov $foo, %reg". */
2304 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
2305 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
2306 if ((rex
& REX_W
) != 0
2307 && ABI_64_P (link_info
->output_bfd
))
2309 /* Keep the REX_W bit in REX byte for LP64. */
2310 r_type
= R_X86_64_32S
;
2311 goto rewrite_modrm_rex
;
2315 /* If the REX_W bit in REX byte isn't needed,
2316 use R_X86_64_32 and clear the W bit to avoid
2317 sign-extend imm32 to imm64. */
2318 r_type
= R_X86_64_32
;
2319 /* Clear the W bit in REX byte. */
2321 goto rewrite_modrm_rex
;
2327 /* R_X86_64_PC32 isn't supported. */
2331 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
2334 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
2335 "test $foo, %reg". */
2336 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
2341 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
2342 "binop $foo, %reg". */
2343 modrm
= 0xc0 | (modrm
& 0x38) >> 3 | (opcode
& 0x3c);
2347 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
2348 overflow when sign-extending imm32 to imm64. */
2349 r_type
= (rex
& REX_W
) != 0 ? R_X86_64_32S
: R_X86_64_32
;
2352 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
2356 /* Move the R bit to the B bit in REX byte. */
2357 rex
= (rex
& ~rex_mask
) | (rex
& REX_R
) >> 2;
2358 bfd_put_8 (abfd
, rex
, contents
+ roff
- 3);
2361 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
2365 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
2368 irel
->r_info
= htab
->r_info (r_symndx
, r_type
);
2375 /* Look through the relocs for a section during the first phase, and
2376 calculate needed space in the global offset table, procedure
2377 linkage table, and dynamic reloc sections. */
2380 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
2382 const Elf_Internal_Rela
*relocs
)
2384 struct elf_x86_64_link_hash_table
*htab
;
2385 Elf_Internal_Shdr
*symtab_hdr
;
2386 struct elf_link_hash_entry
**sym_hashes
;
2387 const Elf_Internal_Rela
*rel
;
2388 const Elf_Internal_Rela
*rel_end
;
2392 if (bfd_link_relocatable (info
))
2395 /* Don't do anything special with non-loaded, non-alloced sections.
2396 In particular, any relocs in such sections should not affect GOT
2397 and PLT reference counting (ie. we don't allow them to create GOT
2398 or PLT entries), there's no possibility or desire to optimize TLS
2399 relocs, and there's not much point in propagating relocs to shared
2400 libs that the dynamic linker won't relocate. */
2401 if ((sec
->flags
& SEC_ALLOC
) == 0)
2404 BFD_ASSERT (is_x86_64_elf (abfd
));
2406 htab
= elf_x86_64_hash_table (info
);
2409 sec
->check_relocs_failed
= 1;
2413 /* Get the section contents. */
2414 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2415 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2416 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2418 sec
->check_relocs_failed
= 1;
2422 symtab_hdr
= &elf_symtab_hdr (abfd
);
2423 sym_hashes
= elf_sym_hashes (abfd
);
2427 rel_end
= relocs
+ sec
->reloc_count
;
2428 for (rel
= relocs
; rel
< rel_end
; rel
++)
2430 unsigned int r_type
;
2431 unsigned long r_symndx
;
2432 struct elf_link_hash_entry
*h
;
2433 struct elf_x86_64_link_hash_entry
*eh
;
2434 Elf_Internal_Sym
*isym
;
2436 bfd_boolean size_reloc
;
2438 r_symndx
= htab
->r_sym (rel
->r_info
);
2439 r_type
= ELF32_R_TYPE (rel
->r_info
);
2441 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
2443 /* xgettext:c-format */
2444 _bfd_error_handler (_("%B: bad symbol index: %d"),
2449 if (r_symndx
< symtab_hdr
->sh_info
)
2451 /* A local symbol. */
2452 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2457 /* Check relocation against local STT_GNU_IFUNC symbol. */
2458 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2460 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
,
2465 /* Fake a STT_GNU_IFUNC symbol. */
2466 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
2468 h
->type
= STT_GNU_IFUNC
;
2471 h
->forced_local
= 1;
2472 h
->root
.type
= bfd_link_hash_defined
;
2480 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2481 while (h
->root
.type
== bfd_link_hash_indirect
2482 || h
->root
.type
== bfd_link_hash_warning
)
2483 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2486 /* Check invalid x32 relocations. */
2487 if (!ABI_64_P (abfd
))
2493 case R_X86_64_DTPOFF64
:
2494 case R_X86_64_TPOFF64
:
2496 case R_X86_64_GOTOFF64
:
2497 case R_X86_64_GOT64
:
2498 case R_X86_64_GOTPCREL64
:
2499 case R_X86_64_GOTPC64
:
2500 case R_X86_64_GOTPLT64
:
2501 case R_X86_64_PLTOFF64
:
2504 name
= h
->root
.root
.string
;
2506 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2509 /* xgettext:c-format */
2510 (_("%B: relocation %s against symbol `%s' isn't "
2511 "supported in x32 mode"), abfd
,
2512 x86_64_elf_howto_table
[r_type
].name
, name
);
2513 bfd_set_error (bfd_error_bad_value
);
2521 /* It is referenced by a non-shared object. */
2523 h
->root
.non_ir_ref_regular
= 1;
2525 if (h
->type
== STT_GNU_IFUNC
)
2526 elf_tdata (info
->output_bfd
)->has_gnu_symbols
2527 |= elf_gnu_symbol_ifunc
;
2530 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, contents
,
2531 symtab_hdr
, sym_hashes
,
2532 &r_type
, GOT_UNKNOWN
,
2533 rel
, rel_end
, h
, r_symndx
, FALSE
))
2536 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2539 case R_X86_64_TLSLD
:
2540 htab
->tls_ld_got
.refcount
+= 1;
2543 case R_X86_64_TPOFF32
:
2544 if (!bfd_link_executable (info
) && ABI_64_P (abfd
))
2545 return elf_x86_64_need_pic (abfd
, sec
, h
, symtab_hdr
, isym
,
2546 &x86_64_elf_howto_table
[r_type
]);
2548 eh
->has_got_reloc
= 1;
2551 case R_X86_64_GOTTPOFF
:
2552 if (!bfd_link_executable (info
))
2553 info
->flags
|= DF_STATIC_TLS
;
2556 case R_X86_64_GOT32
:
2557 case R_X86_64_GOTPCREL
:
2558 case R_X86_64_GOTPCRELX
:
2559 case R_X86_64_REX_GOTPCRELX
:
2560 case R_X86_64_TLSGD
:
2561 case R_X86_64_GOT64
:
2562 case R_X86_64_GOTPCREL64
:
2563 case R_X86_64_GOTPLT64
:
2564 case R_X86_64_GOTPC32_TLSDESC
:
2565 case R_X86_64_TLSDESC_CALL
:
2566 /* This symbol requires a global offset table entry. */
2568 int tls_type
, old_tls_type
;
2572 default: tls_type
= GOT_NORMAL
; break;
2573 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
2574 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
2575 case R_X86_64_GOTPC32_TLSDESC
:
2576 case R_X86_64_TLSDESC_CALL
:
2577 tls_type
= GOT_TLS_GDESC
; break;
2582 h
->got
.refcount
+= 1;
2583 old_tls_type
= eh
->tls_type
;
2587 bfd_signed_vma
*local_got_refcounts
;
2589 /* This is a global offset table entry for a local symbol. */
2590 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2591 if (local_got_refcounts
== NULL
)
2595 size
= symtab_hdr
->sh_info
;
2596 size
*= sizeof (bfd_signed_vma
)
2597 + sizeof (bfd_vma
) + sizeof (char);
2598 local_got_refcounts
= ((bfd_signed_vma
*)
2599 bfd_zalloc (abfd
, size
));
2600 if (local_got_refcounts
== NULL
)
2602 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2603 elf_x86_64_local_tlsdesc_gotent (abfd
)
2604 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2605 elf_x86_64_local_got_tls_type (abfd
)
2606 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2608 local_got_refcounts
[r_symndx
] += 1;
2610 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
2613 /* If a TLS symbol is accessed using IE at least once,
2614 there is no point to use dynamic model for it. */
2615 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2616 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2617 || tls_type
!= GOT_TLS_IE
))
2619 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
2620 tls_type
= old_tls_type
;
2621 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2622 && GOT_TLS_GD_ANY_P (tls_type
))
2623 tls_type
|= old_tls_type
;
2627 name
= h
->root
.root
.string
;
2629 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
2632 /* xgettext:c-format */
2633 (_("%B: '%s' accessed both as normal and"
2634 " thread local symbol"),
2636 bfd_set_error (bfd_error_bad_value
);
2641 if (old_tls_type
!= tls_type
)
2644 eh
->tls_type
= tls_type
;
2646 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2651 case R_X86_64_GOTOFF64
:
2652 case R_X86_64_GOTPC32
:
2653 case R_X86_64_GOTPC64
:
2656 eh
->has_got_reloc
= 1;
2659 case R_X86_64_PLT32
:
2660 case R_X86_64_PLT32_BND
:
2661 /* This symbol requires a procedure linkage table entry. We
2662 actually build the entry in adjust_dynamic_symbol,
2663 because this might be a case of linking PIC code which is
2664 never referenced by a dynamic object, in which case we
2665 don't need to generate a procedure linkage table entry
2668 /* If this is a local symbol, we resolve it directly without
2669 creating a procedure linkage table entry. */
2673 eh
->has_got_reloc
= 1;
2675 h
->plt
.refcount
+= 1;
2678 case R_X86_64_PLTOFF64
:
2679 /* This tries to form the 'address' of a function relative
2680 to GOT. For global symbols we need a PLT entry. */
2684 h
->plt
.refcount
+= 1;
2688 case R_X86_64_SIZE32
:
2689 case R_X86_64_SIZE64
:
2694 if (!ABI_64_P (abfd
))
2700 /* Check relocation overflow as these relocs may lead to
2701 run-time relocation overflow. Don't error out for
2702 sections we don't care about, such as debug sections or
2703 when relocation overflow check is disabled. */
2704 if (!info
->no_reloc_overflow_check
2705 && (bfd_link_pic (info
)
2706 || (bfd_link_executable (info
)
2710 && (sec
->flags
& SEC_READONLY
) == 0)))
2711 return elf_x86_64_need_pic (abfd
, sec
, h
, symtab_hdr
, isym
,
2712 &x86_64_elf_howto_table
[r_type
]);
2718 case R_X86_64_PC32_BND
:
2722 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2723 eh
->has_non_got_reloc
= 1;
2724 /* We are called after all symbols have been resolved. Only
2725 relocation against STT_GNU_IFUNC symbol must go through
2728 && (bfd_link_executable (info
)
2729 || h
->type
== STT_GNU_IFUNC
))
2731 /* If this reloc is in a read-only section, we might
2732 need a copy reloc. We can't check reliably at this
2733 stage whether the section is read-only, as input
2734 sections have not yet been mapped to output sections.
2735 Tentatively set the flag for now, and correct in
2736 adjust_dynamic_symbol. */
2739 /* We may need a .plt entry if the symbol is a function
2740 defined in a shared lib or is a STT_GNU_IFUNC function
2741 referenced from the code or read-only section. */
2743 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2744 h
->plt
.refcount
+= 1;
2746 if (r_type
== R_X86_64_PC32
)
2748 /* Since something like ".long foo - ." may be used
2749 as pointer, make sure that PLT is used if foo is
2750 a function defined in a shared library. */
2751 if ((sec
->flags
& SEC_CODE
) == 0)
2752 h
->pointer_equality_needed
= 1;
2754 else if (r_type
!= R_X86_64_PC32_BND
2755 && r_type
!= R_X86_64_PC64
)
2757 h
->pointer_equality_needed
= 1;
2758 /* At run-time, R_X86_64_64 can be resolved for both
2759 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2760 can only be resolved for x32. */
2761 if ((sec
->flags
& SEC_READONLY
) == 0
2762 && (r_type
== R_X86_64_64
2763 || (!ABI_64_P (abfd
)
2764 && (r_type
== R_X86_64_32
2765 || r_type
== R_X86_64_32S
))))
2766 eh
->func_pointer_refcount
+= 1;
2772 /* If we are creating a shared library, and this is a reloc
2773 against a global symbol, or a non PC relative reloc
2774 against a local symbol, then we need to copy the reloc
2775 into the shared library. However, if we are linking with
2776 -Bsymbolic, we do not need to copy a reloc against a
2777 global symbol which is defined in an object we are
2778 including in the link (i.e., DEF_REGULAR is set). At
2779 this point we have not seen all the input files, so it is
2780 possible that DEF_REGULAR is not set now but will be set
2781 later (it is never cleared). In case of a weak definition,
2782 DEF_REGULAR may be cleared later by a strong definition in
2783 a shared library. We account for that possibility below by
2784 storing information in the relocs_copied field of the hash
2785 table entry. A similar situation occurs when creating
2786 shared libraries and symbol visibility changes render the
2789 If on the other hand, we are creating an executable, we
2790 may need to keep relocations for symbols satisfied by a
2791 dynamic library if we manage to avoid copy relocs for the
2794 Generate dynamic pointer relocation against STT_GNU_IFUNC
2795 symbol in the non-code section. */
2796 if ((bfd_link_pic (info
)
2797 && (! IS_X86_64_PCREL_TYPE (r_type
)
2799 && (! (bfd_link_pie (info
)
2800 || SYMBOLIC_BIND (info
, h
))
2801 || h
->root
.type
== bfd_link_hash_defweak
2802 || !h
->def_regular
))))
2804 && h
->type
== STT_GNU_IFUNC
2805 && r_type
== htab
->pointer_r_type
2806 && (sec
->flags
& SEC_CODE
) == 0)
2807 || (ELIMINATE_COPY_RELOCS
2808 && !bfd_link_pic (info
)
2810 && (h
->root
.type
== bfd_link_hash_defweak
2811 || !h
->def_regular
)))
2813 struct elf_dyn_relocs
*p
;
2814 struct elf_dyn_relocs
**head
;
2816 /* We must copy these reloc types into the output file.
2817 Create a reloc section in dynobj and make room for
2821 sreloc
= _bfd_elf_make_dynamic_reloc_section
2822 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2823 abfd
, /*rela?*/ TRUE
);
2829 /* If this is a global symbol, we count the number of
2830 relocations we need for this symbol. */
2832 head
= &eh
->dyn_relocs
;
2835 /* Track dynamic relocs needed for local syms too.
2836 We really need local syms available to do this
2841 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2846 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2850 /* Beware of type punned pointers vs strict aliasing
2852 vpp
= &(elf_section_data (s
)->local_dynrel
);
2853 head
= (struct elf_dyn_relocs
**)vpp
;
2857 if (p
== NULL
|| p
->sec
!= sec
)
2859 bfd_size_type amt
= sizeof *p
;
2861 p
= ((struct elf_dyn_relocs
*)
2862 bfd_alloc (htab
->elf
.dynobj
, amt
));
2873 /* Count size relocation as PC-relative relocation. */
2874 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
2879 /* This relocation describes the C++ object vtable hierarchy.
2880 Reconstruct it for later use during GC. */
2881 case R_X86_64_GNU_VTINHERIT
:
2882 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2886 /* This relocation describes which C++ vtable entries are actually
2887 used. Record for later use during GC. */
2888 case R_X86_64_GNU_VTENTRY
:
2889 BFD_ASSERT (h
!= NULL
);
2891 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2899 if ((r_type
== R_X86_64_GOTPCREL
2900 || r_type
== R_X86_64_GOTPCRELX
2901 || r_type
== R_X86_64_REX_GOTPCRELX
)
2902 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2903 sec
->need_convert_load
= 1;
2906 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2908 if (!info
->keep_memory
)
2912 /* Cache the section contents for elf_link_input_bfd. */
2913 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2920 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2922 sec
->check_relocs_failed
= 1;
2926 /* Return the section that should be marked against GC for a given
2930 elf_x86_64_gc_mark_hook (asection
*sec
,
2931 struct bfd_link_info
*info
,
2932 Elf_Internal_Rela
*rel
,
2933 struct elf_link_hash_entry
*h
,
2934 Elf_Internal_Sym
*sym
)
2937 switch (ELF32_R_TYPE (rel
->r_info
))
2939 case R_X86_64_GNU_VTINHERIT
:
2940 case R_X86_64_GNU_VTENTRY
:
2944 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2947 /* Remove undefined weak symbol from the dynamic symbol table if it
2948 is resolved to 0. */
2951 elf_x86_64_fixup_symbol (struct bfd_link_info
*info
,
2952 struct elf_link_hash_entry
*h
)
2954 if (h
->dynindx
!= -1
2955 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2956 elf_x86_64_hash_entry (h
)->has_got_reloc
,
2957 elf_x86_64_hash_entry (h
)))
2960 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
2966 /* Adjust a symbol defined by a dynamic object and referenced by a
2967 regular object. The current definition is in some section of the
2968 dynamic object, but we're not including those sections. We have to
2969 change the definition to something the rest of the link can
2973 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2974 struct elf_link_hash_entry
*h
)
2976 struct elf_x86_64_link_hash_table
*htab
;
2978 struct elf_x86_64_link_hash_entry
*eh
;
2979 struct elf_dyn_relocs
*p
;
2981 /* STT_GNU_IFUNC symbol must go through PLT. */
2982 if (h
->type
== STT_GNU_IFUNC
)
2984 /* All local STT_GNU_IFUNC references must be treate as local
2985 calls via local PLT. */
2987 && SYMBOL_CALLS_LOCAL (info
, h
))
2989 bfd_size_type pc_count
= 0, count
= 0;
2990 struct elf_dyn_relocs
**pp
;
2992 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2993 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2995 pc_count
+= p
->pc_count
;
2996 p
->count
-= p
->pc_count
;
3005 if (pc_count
|| count
)
3010 /* Increment PLT reference count only for PC-relative
3013 if (h
->plt
.refcount
<= 0)
3014 h
->plt
.refcount
= 1;
3016 h
->plt
.refcount
+= 1;
3021 if (h
->plt
.refcount
<= 0)
3023 h
->plt
.offset
= (bfd_vma
) -1;
3029 /* If this is a function, put it in the procedure linkage table. We
3030 will fill in the contents of the procedure linkage table later,
3031 when we know the address of the .got section. */
3032 if (h
->type
== STT_FUNC
3035 if (h
->plt
.refcount
<= 0
3036 || SYMBOL_CALLS_LOCAL (info
, h
)
3037 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
3038 && h
->root
.type
== bfd_link_hash_undefweak
))
3040 /* This case can occur if we saw a PLT32 reloc in an input
3041 file, but the symbol was never referred to by a dynamic
3042 object, or if all references were garbage collected. In
3043 such a case, we don't actually need to build a procedure
3044 linkage table, and we can just do a PC32 reloc instead. */
3045 h
->plt
.offset
= (bfd_vma
) -1;
3052 /* It's possible that we incorrectly decided a .plt reloc was
3053 needed for an R_X86_64_PC32 reloc to a non-function sym in
3054 check_relocs. We can't decide accurately between function and
3055 non-function syms in check-relocs; Objects loaded later in
3056 the link may change h->type. So fix it now. */
3057 h
->plt
.offset
= (bfd_vma
) -1;
3059 /* If this is a weak symbol, and there is a real definition, the
3060 processor independent code will have arranged for us to see the
3061 real definition first, and we can just use the same value. */
3062 if (h
->u
.weakdef
!= NULL
)
3064 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
3065 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
3066 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
3067 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
3068 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
3070 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3071 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
3072 eh
->needs_copy
= h
->u
.weakdef
->needs_copy
;
3077 /* This is a reference to a symbol defined by a dynamic object which
3078 is not a function. */
3080 /* If we are creating a shared library, we must presume that the
3081 only references to the symbol are via the global offset table.
3082 For such cases we need not do anything here; the relocations will
3083 be handled correctly by relocate_section. */
3084 if (!bfd_link_executable (info
))
3087 /* If there are no references to this symbol that do not use the
3088 GOT, we don't need to generate a copy reloc. */
3089 if (!h
->non_got_ref
)
3092 /* If -z nocopyreloc was given, we won't generate them either. */
3093 if (info
->nocopyreloc
)
3099 if (ELIMINATE_COPY_RELOCS
)
3101 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3102 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3104 s
= p
->sec
->output_section
;
3105 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3109 /* If we didn't find any dynamic relocs in read-only sections, then
3110 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3118 /* We must allocate the symbol in our .dynbss section, which will
3119 become part of the .bss section of the executable. There will be
3120 an entry for this symbol in the .dynsym section. The dynamic
3121 object will contain position independent code, so all references
3122 from the dynamic object to this symbol will go through the global
3123 offset table. The dynamic linker will use the .dynsym entry to
3124 determine the address it must put in the global offset table, so
3125 both the dynamic object and the regular object will refer to the
3126 same memory location for the variable. */
3128 htab
= elf_x86_64_hash_table (info
);
3132 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
3133 to copy the initial value out of the dynamic object and into the
3134 runtime process image. */
3135 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
3137 s
= htab
->elf
.sdynrelro
;
3138 srel
= htab
->elf
.sreldynrelro
;
3142 s
= htab
->elf
.sdynbss
;
3143 srel
= htab
->elf
.srelbss
;
3145 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
3147 const struct elf_backend_data
*bed
;
3148 bed
= get_elf_backend_data (info
->output_bfd
);
3149 srel
->size
+= bed
->s
->sizeof_rela
;
3153 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
3156 /* Allocate space in .plt, .got and associated reloc sections for
3160 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
3162 struct bfd_link_info
*info
;
3163 struct elf_x86_64_link_hash_table
*htab
;
3164 struct elf_x86_64_link_hash_entry
*eh
;
3165 struct elf_dyn_relocs
*p
;
3166 const struct elf_backend_data
*bed
;
3167 unsigned int plt_entry_size
;
3168 bfd_boolean resolved_to_zero
;
3170 if (h
->root
.type
== bfd_link_hash_indirect
)
3173 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3175 info
= (struct bfd_link_info
*) inf
;
3176 htab
= elf_x86_64_hash_table (info
);
3179 bed
= get_elf_backend_data (info
->output_bfd
);
3180 plt_entry_size
= htab
->plt
.plt_entry_size
;
3182 resolved_to_zero
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
3186 /* We can't use the GOT PLT if pointer equality is needed since
3187 finish_dynamic_symbol won't clear symbol value and the dynamic
3188 linker won't update the GOT slot. We will get into an infinite
3189 loop at run-time. */
3190 if (htab
->plt_got
!= NULL
3191 && h
->type
!= STT_GNU_IFUNC
3192 && !h
->pointer_equality_needed
3193 && h
->plt
.refcount
> 0
3194 && h
->got
.refcount
> 0)
3196 /* Don't use the regular PLT if there are both GOT and GOTPLT
3198 h
->plt
.offset
= (bfd_vma
) -1;
3200 /* Use the GOT PLT. */
3201 eh
->plt_got
.refcount
= 1;
3204 /* Clear the reference count of function pointer relocations if
3205 symbol isn't a normal function. */
3206 if (h
->type
!= STT_FUNC
)
3207 eh
->func_pointer_refcount
= 0;
3209 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
3210 here if it is defined and referenced in a non-shared object. */
3211 if (h
->type
== STT_GNU_IFUNC
3214 if (_bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
3216 &htab
->readonly_dynrelocs_against_ifunc
,
3220 GOT_ENTRY_SIZE
, TRUE
))
3222 asection
*s
= htab
->plt_second
;
3223 if (h
->plt
.offset
!= (bfd_vma
) -1 && s
!= NULL
)
3225 /* Use the second PLT section if it is created. */
3226 eh
->plt_second
.offset
= s
->size
;
3228 /* Make room for this entry in the second PLT section. */
3229 s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
3237 /* Don't create the PLT entry if there are only function pointer
3238 relocations which can be resolved at run-time. */
3239 else if (htab
->elf
.dynamic_sections_created
3240 && (h
->plt
.refcount
> eh
->func_pointer_refcount
3241 || eh
->plt_got
.refcount
> 0))
3243 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
3245 /* Clear the reference count of function pointer relocations
3247 eh
->func_pointer_refcount
= 0;
3249 /* Make sure this symbol is output as a dynamic symbol.
3250 Undefined weak syms won't yet be marked as dynamic. */
3251 if (h
->dynindx
== -1
3253 && !resolved_to_zero
3254 && h
->root
.type
== bfd_link_hash_undefweak
)
3256 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3260 if (bfd_link_pic (info
)
3261 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
3263 asection
*s
= htab
->elf
.splt
;
3264 asection
*second_s
= htab
->plt_second
;
3265 asection
*got_s
= htab
->plt_got
;
3267 /* If this is the first .plt entry, make room for the special
3268 first entry. The .plt section is used by prelink to undo
3269 prelinking for dynamic relocations. */
3271 s
->size
= htab
->plt
.has_plt0
* plt_entry_size
;
3274 eh
->plt_got
.offset
= got_s
->size
;
3277 h
->plt
.offset
= s
->size
;
3279 eh
->plt_second
.offset
= second_s
->size
;
3282 /* If this symbol is not defined in a regular file, and we are
3283 not generating a shared library, then set the symbol to this
3284 location in the .plt. This is required to make function
3285 pointers compare as equal between the normal executable and
3286 the shared library. */
3287 if (! bfd_link_pic (info
)
3292 /* We need to make a call to the entry of the GOT PLT
3293 instead of regular PLT entry. */
3294 h
->root
.u
.def
.section
= got_s
;
3295 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
3301 /* We need to make a call to the entry of the
3302 second PLT instead of regular PLT entry. */
3303 h
->root
.u
.def
.section
= second_s
;
3304 h
->root
.u
.def
.value
= eh
->plt_second
.offset
;
3308 h
->root
.u
.def
.section
= s
;
3309 h
->root
.u
.def
.value
= h
->plt
.offset
;
3314 /* Make room for this entry. */
3316 got_s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
3319 s
->size
+= plt_entry_size
;
3321 second_s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
3323 /* We also need to make an entry in the .got.plt section,
3324 which will be placed in the .got section by the linker
3326 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
3328 /* There should be no PLT relocation against resolved
3329 undefined weak symbol in executable. */
3330 if (!resolved_to_zero
)
3332 /* We also need to make an entry in the .rela.plt
3334 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
3335 htab
->elf
.srelplt
->reloc_count
++;
3341 eh
->plt_got
.offset
= (bfd_vma
) -1;
3342 h
->plt
.offset
= (bfd_vma
) -1;
3348 eh
->plt_got
.offset
= (bfd_vma
) -1;
3349 h
->plt
.offset
= (bfd_vma
) -1;
3353 eh
->tlsdesc_got
= (bfd_vma
) -1;
3355 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
3356 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
3357 if (h
->got
.refcount
> 0
3358 && bfd_link_executable (info
)
3360 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
3362 h
->got
.offset
= (bfd_vma
) -1;
3364 else if (h
->got
.refcount
> 0)
3368 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
3370 /* Make sure this symbol is output as a dynamic symbol.
3371 Undefined weak syms won't yet be marked as dynamic. */
3372 if (h
->dynindx
== -1
3374 && !resolved_to_zero
3375 && h
->root
.type
== bfd_link_hash_undefweak
)
3377 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3381 if (GOT_TLS_GDESC_P (tls_type
))
3383 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
3384 - elf_x86_64_compute_jump_table_size (htab
);
3385 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3386 h
->got
.offset
= (bfd_vma
) -2;
3388 if (! GOT_TLS_GDESC_P (tls_type
)
3389 || GOT_TLS_GD_P (tls_type
))
3392 h
->got
.offset
= s
->size
;
3393 s
->size
+= GOT_ENTRY_SIZE
;
3394 if (GOT_TLS_GD_P (tls_type
))
3395 s
->size
+= GOT_ENTRY_SIZE
;
3397 dyn
= htab
->elf
.dynamic_sections_created
;
3398 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
3399 and two if global. R_X86_64_GOTTPOFF needs one dynamic
3400 relocation. No dynamic relocation against resolved undefined
3401 weak symbol in executable. */
3402 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
3403 || tls_type
== GOT_TLS_IE
)
3404 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3405 else if (GOT_TLS_GD_P (tls_type
))
3406 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
3407 else if (! GOT_TLS_GDESC_P (tls_type
)
3408 && ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3409 && !resolved_to_zero
)
3410 || h
->root
.type
!= bfd_link_hash_undefweak
)
3411 && (bfd_link_pic (info
)
3412 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
3413 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3414 if (GOT_TLS_GDESC_P (tls_type
))
3416 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
3417 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3421 h
->got
.offset
= (bfd_vma
) -1;
3423 if (eh
->dyn_relocs
== NULL
)
3426 /* In the shared -Bsymbolic case, discard space allocated for
3427 dynamic pc-relative relocs against symbols which turn out to be
3428 defined in regular objects. For the normal shared case, discard
3429 space for pc-relative relocs that have become local due to symbol
3430 visibility changes. */
3432 if (bfd_link_pic (info
))
3434 /* Relocs that use pc_count are those that appear on a call
3435 insn, or certain REL relocs that can generated via assembly.
3436 We want calls to protected symbols to resolve directly to the
3437 function rather than going via the plt. If people want
3438 function pointer comparisons to work as expected then they
3439 should avoid writing weird assembly. */
3440 if (SYMBOL_CALLS_LOCAL (info
, h
))
3442 struct elf_dyn_relocs
**pp
;
3444 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
3446 p
->count
-= p
->pc_count
;
3455 /* Also discard relocs on undefined weak syms with non-default
3456 visibility or in PIE. */
3457 if (eh
->dyn_relocs
!= NULL
)
3459 if (h
->root
.type
== bfd_link_hash_undefweak
)
3461 /* Undefined weak symbol is never bound locally in shared
3463 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
3464 || resolved_to_zero
)
3465 eh
->dyn_relocs
= NULL
;
3466 else if (h
->dynindx
== -1
3467 && ! h
->forced_local
3468 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3471 /* For PIE, discard space for pc-relative relocs against
3472 symbols which turn out to need copy relocs. */
3473 else if (bfd_link_executable (info
)
3474 && (h
->needs_copy
|| eh
->needs_copy
)
3478 struct elf_dyn_relocs
**pp
;
3480 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
3482 if (p
->pc_count
!= 0)
3490 else if (ELIMINATE_COPY_RELOCS
)
3492 /* For the non-shared case, discard space for relocs against
3493 symbols which turn out to need copy relocs or are not
3494 dynamic. Keep dynamic relocations for run-time function
3495 pointer initialization. */
3497 if ((!h
->non_got_ref
3498 || eh
->func_pointer_refcount
> 0
3499 || (h
->root
.type
== bfd_link_hash_undefweak
3500 && !resolved_to_zero
))
3503 || (htab
->elf
.dynamic_sections_created
3504 && (h
->root
.type
== bfd_link_hash_undefweak
3505 || h
->root
.type
== bfd_link_hash_undefined
))))
3507 /* Make sure this symbol is output as a dynamic symbol.
3508 Undefined weak syms won't yet be marked as dynamic. */
3509 if (h
->dynindx
== -1
3510 && ! h
->forced_local
3511 && ! resolved_to_zero
3512 && h
->root
.type
== bfd_link_hash_undefweak
3513 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3516 /* If that succeeded, we know we'll be keeping all the
3518 if (h
->dynindx
!= -1)
3522 eh
->dyn_relocs
= NULL
;
3523 eh
->func_pointer_refcount
= 0;
3528 /* Finally, allocate space. */
3529 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3533 sreloc
= elf_section_data (p
->sec
)->sreloc
;
3535 BFD_ASSERT (sreloc
!= NULL
);
3537 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3543 /* Allocate space in .plt, .got and associated reloc sections for
3544 local dynamic relocs. */
3547 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
3549 struct elf_link_hash_entry
*h
3550 = (struct elf_link_hash_entry
*) *slot
;
3552 if (h
->type
!= STT_GNU_IFUNC
3556 || h
->root
.type
!= bfd_link_hash_defined
)
3559 return elf_x86_64_allocate_dynrelocs (h
, inf
);
3562 /* Find any dynamic relocs that apply to read-only sections. */
3565 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
3568 struct elf_x86_64_link_hash_entry
*eh
;
3569 struct elf_dyn_relocs
*p
;
3571 /* Skip local IFUNC symbols. */
3572 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
3575 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3576 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3578 asection
*s
= p
->sec
->output_section
;
3580 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3582 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3584 info
->flags
|= DF_TEXTREL
;
3586 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3587 || info
->error_textrel
)
3588 /* xgettext:c-format */
3589 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3590 p
->sec
->owner
, h
->root
.root
.string
,
3593 /* Not an error, just cut short the traversal. */
3600 /* Convert load via the GOT slot to load immediate. */
3603 elf_x86_64_convert_load (bfd
*abfd
, asection
*sec
,
3604 struct bfd_link_info
*link_info
)
3606 Elf_Internal_Shdr
*symtab_hdr
;
3607 Elf_Internal_Rela
*internal_relocs
;
3608 Elf_Internal_Rela
*irel
, *irelend
;
3610 struct elf_x86_64_link_hash_table
*htab
;
3611 bfd_boolean changed
;
3612 bfd_signed_vma
*local_got_refcounts
;
3614 /* Don't even try to convert non-ELF outputs. */
3615 if (!is_elf_hash_table (link_info
->hash
))
3618 /* Nothing to do if there is no need or no output. */
3619 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
3620 || sec
->need_convert_load
== 0
3621 || bfd_is_abs_section (sec
->output_section
))
3624 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3626 /* Load the relocations for this section. */
3627 internal_relocs
= (_bfd_elf_link_read_relocs
3628 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3629 link_info
->keep_memory
));
3630 if (internal_relocs
== NULL
)
3634 htab
= elf_x86_64_hash_table (link_info
);
3635 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3637 /* Get the section contents. */
3638 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3639 contents
= elf_section_data (sec
)->this_hdr
.contents
;
3642 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
3646 irelend
= internal_relocs
+ sec
->reloc_count
;
3647 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3649 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
3650 unsigned int r_symndx
;
3651 struct elf_link_hash_entry
*h
;
3652 bfd_boolean converted
;
3654 if (r_type
!= R_X86_64_GOTPCRELX
3655 && r_type
!= R_X86_64_REX_GOTPCRELX
3656 && r_type
!= R_X86_64_GOTPCREL
)
3659 r_symndx
= htab
->r_sym (irel
->r_info
);
3660 if (r_symndx
< symtab_hdr
->sh_info
)
3661 h
= elf_x86_64_get_local_sym_hash (htab
, sec
->owner
,
3662 (const Elf_Internal_Rela
*) irel
,
3666 h
= elf_sym_hashes (abfd
)[r_symndx
- symtab_hdr
->sh_info
];
3667 while (h
->root
.type
== bfd_link_hash_indirect
3668 || h
->root
.type
== bfd_link_hash_warning
)
3669 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3672 /* STT_GNU_IFUNC must keep GOTPCREL relocations. */
3673 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
3677 if (!elf_x86_64_convert_load_reloc (abfd
, sec
, contents
, irel
, h
,
3678 &converted
, link_info
))
3683 changed
= converted
;
3686 if (h
->got
.refcount
> 0)
3687 h
->got
.refcount
-= 1;
3691 if (local_got_refcounts
!= NULL
3692 && local_got_refcounts
[r_symndx
] > 0)
3693 local_got_refcounts
[r_symndx
] -= 1;
3698 if (contents
!= NULL
3699 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3701 if (!changed
&& !link_info
->keep_memory
)
3705 /* Cache the section contents for elf_link_input_bfd. */
3706 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3710 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3713 free (internal_relocs
);
3715 elf_section_data (sec
)->relocs
= internal_relocs
;
3721 if (contents
!= NULL
3722 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3724 if (internal_relocs
!= NULL
3725 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3726 free (internal_relocs
);
3730 /* Set the sizes of the dynamic sections. */
3733 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
3734 struct bfd_link_info
*info
)
3736 struct elf_x86_64_link_hash_table
*htab
;
3741 const struct elf_backend_data
*bed
;
3743 htab
= elf_x86_64_hash_table (info
);
3746 bed
= get_elf_backend_data (output_bfd
);
3748 dynobj
= htab
->elf
.dynobj
;
3752 /* Set up .got offsets for local syms, and space for local dynamic
3754 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3756 bfd_signed_vma
*local_got
;
3757 bfd_signed_vma
*end_local_got
;
3758 char *local_tls_type
;
3759 bfd_vma
*local_tlsdesc_gotent
;
3760 bfd_size_type locsymcount
;
3761 Elf_Internal_Shdr
*symtab_hdr
;
3764 if (! is_x86_64_elf (ibfd
))
3767 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3769 struct elf_dyn_relocs
*p
;
3771 if (!elf_x86_64_convert_load (ibfd
, s
, info
))
3774 for (p
= (struct elf_dyn_relocs
*)
3775 (elf_section_data (s
)->local_dynrel
);
3779 if (!bfd_is_abs_section (p
->sec
)
3780 && bfd_is_abs_section (p
->sec
->output_section
))
3782 /* Input section has been discarded, either because
3783 it is a copy of a linkonce section or due to
3784 linker script /DISCARD/, so we'll be discarding
3787 else if (p
->count
!= 0)
3789 srel
= elf_section_data (p
->sec
)->sreloc
;
3790 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3791 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3792 && (info
->flags
& DF_TEXTREL
) == 0)
3794 info
->flags
|= DF_TEXTREL
;
3795 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3796 || info
->error_textrel
)
3797 /* xgettext:c-format */
3798 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3799 p
->sec
->owner
, p
->sec
);
3805 local_got
= elf_local_got_refcounts (ibfd
);
3809 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3810 locsymcount
= symtab_hdr
->sh_info
;
3811 end_local_got
= local_got
+ locsymcount
;
3812 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
3813 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
3815 srel
= htab
->elf
.srelgot
;
3816 for (; local_got
< end_local_got
;
3817 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3819 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3822 if (GOT_TLS_GDESC_P (*local_tls_type
))
3824 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3825 - elf_x86_64_compute_jump_table_size (htab
);
3826 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3827 *local_got
= (bfd_vma
) -2;
3829 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3830 || GOT_TLS_GD_P (*local_tls_type
))
3832 *local_got
= s
->size
;
3833 s
->size
+= GOT_ENTRY_SIZE
;
3834 if (GOT_TLS_GD_P (*local_tls_type
))
3835 s
->size
+= GOT_ENTRY_SIZE
;
3837 if (bfd_link_pic (info
)
3838 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3839 || *local_tls_type
== GOT_TLS_IE
)
3841 if (GOT_TLS_GDESC_P (*local_tls_type
))
3843 htab
->elf
.srelplt
->size
3844 += bed
->s
->sizeof_rela
;
3845 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3847 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3848 || GOT_TLS_GD_P (*local_tls_type
))
3849 srel
->size
+= bed
->s
->sizeof_rela
;
3853 *local_got
= (bfd_vma
) -1;
3857 if (htab
->tls_ld_got
.refcount
> 0)
3859 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3861 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
3862 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
3863 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3866 htab
->tls_ld_got
.offset
= -1;
3868 /* Allocate global sym .plt and .got entries, and space for global
3869 sym dynamic relocs. */
3870 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
3873 /* Allocate .plt and .got entries, and space for local symbols. */
3874 htab_traverse (htab
->loc_hash_table
,
3875 elf_x86_64_allocate_local_dynrelocs
,
3878 /* For every jump slot reserved in the sgotplt, reloc_count is
3879 incremented. However, when we reserve space for TLS descriptors,
3880 it's not incremented, so in order to compute the space reserved
3881 for them, it suffices to multiply the reloc count by the jump
3884 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3885 so that R_X86_64_IRELATIVE entries come last. */
3886 if (htab
->elf
.srelplt
)
3888 htab
->sgotplt_jump_table_size
3889 = elf_x86_64_compute_jump_table_size (htab
);
3890 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3892 else if (htab
->elf
.irelplt
)
3893 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3895 if (htab
->tlsdesc_plt
)
3897 /* If we're not using lazy TLS relocations, don't generate the
3898 PLT and GOT entries they require. */
3899 if ((info
->flags
& DF_BIND_NOW
))
3900 htab
->tlsdesc_plt
= 0;
3903 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
3904 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
3905 /* Reserve room for the initial entry.
3906 FIXME: we could probably do away with it in this case. */
3907 if (htab
->elf
.splt
->size
== 0)
3908 htab
->elf
.splt
->size
= htab
->plt
.plt_entry_size
;
3909 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
3910 htab
->elf
.splt
->size
+= htab
->plt
.plt_entry_size
;
3914 if (htab
->elf
.sgotplt
)
3916 /* Don't allocate .got.plt section if there are no GOT nor PLT
3917 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3918 if ((htab
->elf
.hgot
== NULL
3919 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3920 && (htab
->elf
.sgotplt
->size
3921 == get_elf_backend_data (output_bfd
)->got_header_size
)
3922 && (htab
->elf
.splt
== NULL
3923 || htab
->elf
.splt
->size
== 0)
3924 && (htab
->elf
.sgot
== NULL
3925 || htab
->elf
.sgot
->size
== 0)
3926 && (htab
->elf
.iplt
== NULL
3927 || htab
->elf
.iplt
->size
== 0)
3928 && (htab
->elf
.igotplt
== NULL
3929 || htab
->elf
.igotplt
->size
== 0))
3930 htab
->elf
.sgotplt
->size
= 0;
3933 if (_bfd_elf_eh_frame_present (info
))
3935 if (htab
->plt_eh_frame
!= NULL
3936 && htab
->elf
.splt
!= NULL
3937 && htab
->elf
.splt
->size
!= 0
3938 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
))
3939 htab
->plt_eh_frame
->size
= htab
->plt
.eh_frame_plt_size
;
3941 if (htab
->plt_got_eh_frame
!= NULL
3942 && htab
->plt_got
!= NULL
3943 && htab
->plt_got
->size
!= 0
3944 && !bfd_is_abs_section (htab
->plt_got
->output_section
))
3945 htab
->plt_got_eh_frame
->size
3946 = htab
->non_lazy_plt
->eh_frame_plt_size
;
3948 /* Unwind info for the second PLT and .plt.got sections are
3950 if (htab
->plt_second_eh_frame
!= NULL
3951 && htab
->plt_second
!= NULL
3952 && htab
->plt_second
->size
!= 0
3953 && !bfd_is_abs_section (htab
->plt_second
->output_section
))
3954 htab
->plt_second_eh_frame
->size
3955 = htab
->non_lazy_plt
->eh_frame_plt_size
;
3958 /* We now have determined the sizes of the various dynamic sections.
3959 Allocate memory for them. */
3961 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3963 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3966 if (s
== htab
->elf
.splt
3967 || s
== htab
->elf
.sgot
3968 || s
== htab
->elf
.sgotplt
3969 || s
== htab
->elf
.iplt
3970 || s
== htab
->elf
.igotplt
3971 || s
== htab
->plt_second
3972 || s
== htab
->plt_got
3973 || s
== htab
->plt_eh_frame
3974 || s
== htab
->plt_got_eh_frame
3975 || s
== htab
->plt_second_eh_frame
3976 || s
== htab
->elf
.sdynbss
3977 || s
== htab
->elf
.sdynrelro
)
3979 /* Strip this section if we don't need it; see the
3982 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
3984 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3987 /* We use the reloc_count field as a counter if we need
3988 to copy relocs into the output file. */
3989 if (s
!= htab
->elf
.srelplt
)
3994 /* It's not one of our sections, so don't allocate space. */
4000 /* If we don't need this section, strip it from the
4001 output file. This is mostly to handle .rela.bss and
4002 .rela.plt. We must create both sections in
4003 create_dynamic_sections, because they must be created
4004 before the linker maps input sections to output
4005 sections. The linker does that before
4006 adjust_dynamic_symbol is called, and it is that
4007 function which decides whether anything needs to go
4008 into these sections. */
4010 s
->flags
|= SEC_EXCLUDE
;
4014 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
4017 /* Allocate memory for the section contents. We use bfd_zalloc
4018 here in case unused entries are not reclaimed before the
4019 section's contents are written out. This should not happen,
4020 but this way if it does, we get a R_X86_64_NONE reloc instead
4022 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
4023 if (s
->contents
== NULL
)
4027 if (htab
->plt_eh_frame
!= NULL
4028 && htab
->plt_eh_frame
->contents
!= NULL
)
4030 memcpy (htab
->plt_eh_frame
->contents
,
4031 htab
->plt
.eh_frame_plt
, htab
->plt_eh_frame
->size
);
4032 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
4033 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
4036 if (htab
->plt_got_eh_frame
!= NULL
4037 && htab
->plt_got_eh_frame
->contents
!= NULL
)
4039 memcpy (htab
->plt_got_eh_frame
->contents
,
4040 htab
->non_lazy_plt
->eh_frame_plt
,
4041 htab
->plt_got_eh_frame
->size
);
4042 bfd_put_32 (dynobj
, htab
->plt_got
->size
,
4043 (htab
->plt_got_eh_frame
->contents
4044 + PLT_FDE_LEN_OFFSET
));
4047 if (htab
->plt_second_eh_frame
!= NULL
4048 && htab
->plt_second_eh_frame
->contents
!= NULL
)
4050 memcpy (htab
->plt_second_eh_frame
->contents
,
4051 htab
->non_lazy_plt
->eh_frame_plt
,
4052 htab
->plt_second_eh_frame
->size
);
4053 bfd_put_32 (dynobj
, htab
->plt_second
->size
,
4054 (htab
->plt_second_eh_frame
->contents
4055 + PLT_FDE_LEN_OFFSET
));
4058 if (htab
->elf
.dynamic_sections_created
)
4060 /* Add some entries to the .dynamic section. We fill in the
4061 values later, in elf_x86_64_finish_dynamic_sections, but we
4062 must add the entries now so that we get the correct size for
4063 the .dynamic section. The DT_DEBUG entry is filled in by the
4064 dynamic linker and used by the debugger. */
4065 #define add_dynamic_entry(TAG, VAL) \
4066 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4068 if (bfd_link_executable (info
))
4070 if (!add_dynamic_entry (DT_DEBUG
, 0))
4074 if (htab
->elf
.splt
->size
!= 0)
4076 /* DT_PLTGOT is used by prelink even if there is no PLT
4078 if (!add_dynamic_entry (DT_PLTGOT
, 0))
4082 if (htab
->elf
.srelplt
->size
!= 0)
4084 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
4085 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
4086 || !add_dynamic_entry (DT_JMPREL
, 0))
4090 if (htab
->tlsdesc_plt
4091 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
4092 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
4097 if (!add_dynamic_entry (DT_RELA
, 0)
4098 || !add_dynamic_entry (DT_RELASZ
, 0)
4099 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
4102 /* If any dynamic relocs apply to a read-only section,
4103 then we need a DT_TEXTREL entry. */
4104 if ((info
->flags
& DF_TEXTREL
) == 0)
4105 elf_link_hash_traverse (&htab
->elf
,
4106 elf_x86_64_readonly_dynrelocs
,
4109 if ((info
->flags
& DF_TEXTREL
) != 0)
4111 if (htab
->readonly_dynrelocs_against_ifunc
)
4113 info
->callbacks
->einfo
4114 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
4115 bfd_set_error (bfd_error_bad_value
);
4119 if (!add_dynamic_entry (DT_TEXTREL
, 0))
4124 #undef add_dynamic_entry
4130 elf_x86_64_always_size_sections (bfd
*output_bfd
,
4131 struct bfd_link_info
*info
)
4133 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
4137 struct elf_link_hash_entry
*tlsbase
;
4139 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
4140 "_TLS_MODULE_BASE_",
4141 FALSE
, FALSE
, FALSE
);
4143 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
4145 struct elf_x86_64_link_hash_table
*htab
;
4146 struct bfd_link_hash_entry
*bh
= NULL
;
4147 const struct elf_backend_data
*bed
4148 = get_elf_backend_data (output_bfd
);
4150 htab
= elf_x86_64_hash_table (info
);
4154 if (!(_bfd_generic_link_add_one_symbol
4155 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
4156 tls_sec
, 0, NULL
, FALSE
,
4157 bed
->collect
, &bh
)))
4160 htab
->tls_module_base
= bh
;
4162 tlsbase
= (struct elf_link_hash_entry
*)bh
;
4163 tlsbase
->def_regular
= 1;
4164 tlsbase
->other
= STV_HIDDEN
;
4165 tlsbase
->root
.linker_def
= 1;
4166 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
4173 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
4174 executables. Rather than setting it to the beginning of the TLS
4175 section, we have to set it to the end. This function may be called
4176 multiple times, it is idempotent. */
4179 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
4181 struct elf_x86_64_link_hash_table
*htab
;
4182 struct bfd_link_hash_entry
*base
;
4184 if (!bfd_link_executable (info
))
4187 htab
= elf_x86_64_hash_table (info
);
4191 base
= htab
->tls_module_base
;
4195 base
->u
.def
.value
= htab
->elf
.tls_size
;
4198 /* Return the base VMA address which should be subtracted from real addresses
4199 when resolving @dtpoff relocation.
4200 This is PT_TLS segment p_vaddr. */
4203 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
4205 /* If tls_sec is NULL, we should have signalled an error already. */
4206 if (elf_hash_table (info
)->tls_sec
== NULL
)
4208 return elf_hash_table (info
)->tls_sec
->vma
;
4211 /* Return the relocation value for @tpoff relocation
4212 if STT_TLS virtual address is ADDRESS. */
4215 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
4217 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
4218 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
4219 bfd_vma static_tls_size
;
4221 /* If tls_segment is NULL, we should have signalled an error already. */
4222 if (htab
->tls_sec
== NULL
)
4225 /* Consider special static TLS alignment requirements. */
4226 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
4227 return address
- static_tls_size
- htab
->tls_sec
->vma
;
4230 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
4234 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
4236 /* Opcode Instruction
4239 0x0f 0x8x conditional jump */
4241 && (contents
[offset
- 1] == 0xe8
4242 || contents
[offset
- 1] == 0xe9))
4244 && contents
[offset
- 2] == 0x0f
4245 && (contents
[offset
- 1] & 0xf0) == 0x80));
4248 /* Relocate an x86_64 ELF section. */
4251 elf_x86_64_relocate_section (bfd
*output_bfd
,
4252 struct bfd_link_info
*info
,
4254 asection
*input_section
,
4256 Elf_Internal_Rela
*relocs
,
4257 Elf_Internal_Sym
*local_syms
,
4258 asection
**local_sections
)
4260 struct elf_x86_64_link_hash_table
*htab
;
4261 Elf_Internal_Shdr
*symtab_hdr
;
4262 struct elf_link_hash_entry
**sym_hashes
;
4263 bfd_vma
*local_got_offsets
;
4264 bfd_vma
*local_tlsdesc_gotents
;
4265 Elf_Internal_Rela
*rel
;
4266 Elf_Internal_Rela
*wrel
;
4267 Elf_Internal_Rela
*relend
;
4268 unsigned int plt_entry_size
;
4270 BFD_ASSERT (is_x86_64_elf (input_bfd
));
4272 /* Skip if check_relocs failed. */
4273 if (input_section
->check_relocs_failed
)
4276 htab
= elf_x86_64_hash_table (info
);
4279 plt_entry_size
= htab
->plt
.plt_entry_size
;
4280 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4281 sym_hashes
= elf_sym_hashes (input_bfd
);
4282 local_got_offsets
= elf_local_got_offsets (input_bfd
);
4283 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
4285 elf_x86_64_set_tls_module_base (info
);
4287 rel
= wrel
= relocs
;
4288 relend
= relocs
+ input_section
->reloc_count
;
4289 for (; rel
< relend
; wrel
++, rel
++)
4291 unsigned int r_type
;
4292 reloc_howto_type
*howto
;
4293 unsigned long r_symndx
;
4294 struct elf_link_hash_entry
*h
;
4295 struct elf_x86_64_link_hash_entry
*eh
;
4296 Elf_Internal_Sym
*sym
;
4298 bfd_vma off
, offplt
, plt_offset
;
4300 bfd_boolean unresolved_reloc
;
4301 bfd_reloc_status_type r
;
4303 asection
*base_got
, *resolved_plt
;
4305 bfd_boolean resolved_to_zero
;
4306 bfd_boolean relative_reloc
;
4308 r_type
= ELF32_R_TYPE (rel
->r_info
);
4309 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
4310 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
4317 if (r_type
>= (int) R_X86_64_standard
)
4320 /* xgettext:c-format */
4321 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
4322 input_bfd
, r_type
, input_section
);
4323 bfd_set_error (bfd_error_bad_value
);
4327 if (r_type
!= (int) R_X86_64_32
4328 || ABI_64_P (output_bfd
))
4329 howto
= x86_64_elf_howto_table
+ r_type
;
4331 howto
= (x86_64_elf_howto_table
4332 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
4333 r_symndx
= htab
->r_sym (rel
->r_info
);
4337 unresolved_reloc
= FALSE
;
4338 if (r_symndx
< symtab_hdr
->sh_info
)
4340 sym
= local_syms
+ r_symndx
;
4341 sec
= local_sections
[r_symndx
];
4343 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
4345 st_size
= sym
->st_size
;
4347 /* Relocate against local STT_GNU_IFUNC symbol. */
4348 if (!bfd_link_relocatable (info
)
4349 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
4351 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
4356 /* Set STT_GNU_IFUNC symbol value. */
4357 h
->root
.u
.def
.value
= sym
->st_value
;
4358 h
->root
.u
.def
.section
= sec
;
4363 bfd_boolean warned ATTRIBUTE_UNUSED
;
4364 bfd_boolean ignored ATTRIBUTE_UNUSED
;
4366 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4367 r_symndx
, symtab_hdr
, sym_hashes
,
4369 unresolved_reloc
, warned
, ignored
);
4373 if (sec
!= NULL
&& discarded_section (sec
))
4375 _bfd_clear_contents (howto
, input_bfd
, input_section
,
4376 contents
+ rel
->r_offset
);
4377 wrel
->r_offset
= rel
->r_offset
;
4381 /* For ld -r, remove relocations in debug sections against
4382 sections defined in discarded sections. Not done for
4383 eh_frame editing code expects to be present. */
4384 if (bfd_link_relocatable (info
)
4385 && (input_section
->flags
& SEC_DEBUGGING
))
4391 if (bfd_link_relocatable (info
))
4398 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
4400 if (r_type
== R_X86_64_64
)
4402 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
4403 zero-extend it to 64bit if addend is zero. */
4404 r_type
= R_X86_64_32
;
4405 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
4407 else if (r_type
== R_X86_64_SIZE64
)
4409 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
4410 zero-extend it to 64bit if addend is zero. */
4411 r_type
= R_X86_64_SIZE32
;
4412 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
4416 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
4418 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4419 it here if it is defined in a non-shared object. */
4421 && h
->type
== STT_GNU_IFUNC
4427 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4429 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4430 sections because such sections are not SEC_ALLOC and
4431 thus ld.so will not process them. */
4432 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
4442 case R_X86_64_GOTPCREL
:
4443 case R_X86_64_GOTPCRELX
:
4444 case R_X86_64_REX_GOTPCRELX
:
4445 case R_X86_64_GOTPCREL64
:
4446 base_got
= htab
->elf
.sgot
;
4447 off
= h
->got
.offset
;
4449 if (base_got
== NULL
)
4452 if (off
== (bfd_vma
) -1)
4454 /* We can't use h->got.offset here to save state, or
4455 even just remember the offset, as finish_dynamic_symbol
4456 would use that as offset into .got. */
4458 if (h
->plt
.offset
== (bfd_vma
) -1)
4461 if (htab
->elf
.splt
!= NULL
)
4463 plt_index
= (h
->plt
.offset
/ plt_entry_size
4464 - htab
->plt
.has_plt0
);
4465 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
4466 base_got
= htab
->elf
.sgotplt
;
4470 plt_index
= h
->plt
.offset
/ plt_entry_size
;
4471 off
= plt_index
* GOT_ENTRY_SIZE
;
4472 base_got
= htab
->elf
.igotplt
;
4475 if (h
->dynindx
== -1
4479 /* This references the local defitionion. We must
4480 initialize this entry in the global offset table.
4481 Since the offset must always be a multiple of 8,
4482 we use the least significant bit to record
4483 whether we have initialized it already.
4485 When doing a dynamic link, we create a .rela.got
4486 relocation entry to initialize the value. This
4487 is done in the finish_dynamic_symbol routine. */
4492 bfd_put_64 (output_bfd
, relocation
,
4493 base_got
->contents
+ off
);
4494 /* Note that this is harmless for the GOTPLT64
4495 case, as -1 | 1 still is -1. */
4501 relocation
= (base_got
->output_section
->vma
4502 + base_got
->output_offset
+ off
);
4507 if (h
->plt
.offset
== (bfd_vma
) -1)
4509 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4510 if (r_type
== htab
->pointer_r_type
4511 && (input_section
->flags
& SEC_CODE
) == 0)
4512 goto do_ifunc_pointer
;
4513 goto bad_ifunc_reloc
;
4516 /* STT_GNU_IFUNC symbol must go through PLT. */
4517 if (htab
->elf
.splt
!= NULL
)
4519 if (htab
->plt_second
!= NULL
)
4521 resolved_plt
= htab
->plt_second
;
4522 plt_offset
= eh
->plt_second
.offset
;
4526 resolved_plt
= htab
->elf
.splt
;
4527 plt_offset
= h
->plt
.offset
;
4532 resolved_plt
= htab
->elf
.iplt
;
4533 plt_offset
= h
->plt
.offset
;
4536 relocation
= (resolved_plt
->output_section
->vma
4537 + resolved_plt
->output_offset
+ plt_offset
);
4543 if (h
->root
.root
.string
)
4544 name
= h
->root
.root
.string
;
4546 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4549 /* xgettext:c-format */
4550 (_("%B: relocation %s against STT_GNU_IFUNC "
4551 "symbol `%s' isn't supported"), input_bfd
,
4553 bfd_set_error (bfd_error_bad_value
);
4557 if (bfd_link_pic (info
))
4562 if (ABI_64_P (output_bfd
))
4567 if (rel
->r_addend
!= 0)
4569 if (h
->root
.root
.string
)
4570 name
= h
->root
.root
.string
;
4572 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4575 /* xgettext:c-format */
4576 (_("%B: relocation %s against STT_GNU_IFUNC "
4577 "symbol `%s' has non-zero addend: %d"),
4578 input_bfd
, howto
->name
, name
, rel
->r_addend
);
4579 bfd_set_error (bfd_error_bad_value
);
4583 /* Generate dynamic relcoation only when there is a
4584 non-GOT reference in a shared object or there is no
4586 if ((bfd_link_pic (info
) && h
->non_got_ref
)
4587 || h
->plt
.offset
== (bfd_vma
) -1)
4589 Elf_Internal_Rela outrel
;
4592 /* Need a dynamic relocation to get the real function
4594 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
4598 if (outrel
.r_offset
== (bfd_vma
) -1
4599 || outrel
.r_offset
== (bfd_vma
) -2)
4602 outrel
.r_offset
+= (input_section
->output_section
->vma
4603 + input_section
->output_offset
);
4605 if (h
->dynindx
== -1
4607 || bfd_link_executable (info
))
4609 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
4610 h
->root
.root
.string
,
4611 h
->root
.u
.def
.section
->owner
);
4613 /* This symbol is resolved locally. */
4614 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4615 outrel
.r_addend
= (h
->root
.u
.def
.value
4616 + h
->root
.u
.def
.section
->output_section
->vma
4617 + h
->root
.u
.def
.section
->output_offset
);
4621 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
4622 outrel
.r_addend
= 0;
4625 /* Dynamic relocations are stored in
4626 1. .rela.ifunc section in PIC object.
4627 2. .rela.got section in dynamic executable.
4628 3. .rela.iplt section in static executable. */
4629 if (bfd_link_pic (info
))
4630 sreloc
= htab
->elf
.irelifunc
;
4631 else if (htab
->elf
.splt
!= NULL
)
4632 sreloc
= htab
->elf
.srelgot
;
4634 sreloc
= htab
->elf
.irelplt
;
4635 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4637 /* If this reloc is against an external symbol, we
4638 do not want to fiddle with the addend. Otherwise,
4639 we need to include the symbol value so that it
4640 becomes an addend for the dynamic reloc. For an
4641 internal symbol, we have updated addend. */
4646 case R_X86_64_PC32_BND
:
4648 case R_X86_64_PLT32
:
4649 case R_X86_64_PLT32_BND
:
4654 resolved_to_zero
= (eh
!= NULL
4655 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
4659 /* When generating a shared object, the relocations handled here are
4660 copied into the output file to be resolved at run time. */
4663 case R_X86_64_GOT32
:
4664 case R_X86_64_GOT64
:
4665 /* Relocation is to the entry for this symbol in the global
4667 case R_X86_64_GOTPCREL
:
4668 case R_X86_64_GOTPCRELX
:
4669 case R_X86_64_REX_GOTPCRELX
:
4670 case R_X86_64_GOTPCREL64
:
4671 /* Use global offset table entry as symbol value. */
4672 case R_X86_64_GOTPLT64
:
4673 /* This is obsolete and treated the the same as GOT64. */
4674 base_got
= htab
->elf
.sgot
;
4676 if (htab
->elf
.sgot
== NULL
)
4679 relative_reloc
= FALSE
;
4684 off
= h
->got
.offset
;
4686 && h
->plt
.offset
!= (bfd_vma
)-1
4687 && off
== (bfd_vma
)-1)
4689 /* We can't use h->got.offset here to save
4690 state, or even just remember the offset, as
4691 finish_dynamic_symbol would use that as offset into
4693 bfd_vma plt_index
= (h
->plt
.offset
/ plt_entry_size
4694 - htab
->plt
.has_plt0
);
4695 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
4696 base_got
= htab
->elf
.sgotplt
;
4699 dyn
= htab
->elf
.dynamic_sections_created
;
4701 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, bfd_link_pic (info
), h
)
4702 || (bfd_link_pic (info
)
4703 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4704 || (ELF_ST_VISIBILITY (h
->other
)
4705 && h
->root
.type
== bfd_link_hash_undefweak
))
4707 /* This is actually a static link, or it is a -Bsymbolic
4708 link and the symbol is defined locally, or the symbol
4709 was forced to be local because of a version file. We
4710 must initialize this entry in the global offset table.
4711 Since the offset must always be a multiple of 8, we
4712 use the least significant bit to record whether we
4713 have initialized it already.
4715 When doing a dynamic link, we create a .rela.got
4716 relocation entry to initialize the value. This is
4717 done in the finish_dynamic_symbol routine. */
4722 bfd_put_64 (output_bfd
, relocation
,
4723 base_got
->contents
+ off
);
4724 /* Note that this is harmless for the GOTPLT64 case,
4725 as -1 | 1 still is -1. */
4728 if (h
->dynindx
== -1
4730 && h
->root
.type
!= bfd_link_hash_undefweak
4731 && bfd_link_pic (info
))
4733 /* If this symbol isn't dynamic in PIC,
4734 generate R_X86_64_RELATIVE here. */
4735 eh
->no_finish_dynamic_symbol
= 1;
4736 relative_reloc
= TRUE
;
4741 unresolved_reloc
= FALSE
;
4745 if (local_got_offsets
== NULL
)
4748 off
= local_got_offsets
[r_symndx
];
4750 /* The offset must always be a multiple of 8. We use
4751 the least significant bit to record whether we have
4752 already generated the necessary reloc. */
4757 bfd_put_64 (output_bfd
, relocation
,
4758 base_got
->contents
+ off
);
4759 local_got_offsets
[r_symndx
] |= 1;
4761 if (bfd_link_pic (info
))
4762 relative_reloc
= TRUE
;
4769 Elf_Internal_Rela outrel
;
4771 /* We need to generate a R_X86_64_RELATIVE reloc
4772 for the dynamic linker. */
4773 s
= htab
->elf
.srelgot
;
4777 outrel
.r_offset
= (base_got
->output_section
->vma
4778 + base_got
->output_offset
4780 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4781 outrel
.r_addend
= relocation
;
4782 elf_append_rela (output_bfd
, s
, &outrel
);
4785 if (off
>= (bfd_vma
) -2)
4788 relocation
= base_got
->output_section
->vma
4789 + base_got
->output_offset
+ off
;
4790 if (r_type
!= R_X86_64_GOTPCREL
4791 && r_type
!= R_X86_64_GOTPCRELX
4792 && r_type
!= R_X86_64_REX_GOTPCRELX
4793 && r_type
!= R_X86_64_GOTPCREL64
)
4794 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4795 - htab
->elf
.sgotplt
->output_offset
;
4799 case R_X86_64_GOTOFF64
:
4800 /* Relocation is relative to the start of the global offset
4803 /* Check to make sure it isn't a protected function or data
4804 symbol for shared library since it may not be local when
4805 used as function address or with copy relocation. We also
4806 need to make sure that a symbol is referenced locally. */
4807 if (bfd_link_pic (info
) && h
)
4809 if (!h
->def_regular
)
4813 switch (ELF_ST_VISIBILITY (h
->other
))
4816 v
= _("hidden symbol");
4819 v
= _("internal symbol");
4822 v
= _("protected symbol");
4830 /* xgettext:c-format */
4831 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
4832 " `%s' can not be used when making a shared object"),
4833 input_bfd
, v
, h
->root
.root
.string
);
4834 bfd_set_error (bfd_error_bad_value
);
4837 else if (!bfd_link_executable (info
)
4838 && !SYMBOL_REFERENCES_LOCAL (info
, h
)
4839 && (h
->type
== STT_FUNC
4840 || h
->type
== STT_OBJECT
)
4841 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4844 /* xgettext:c-format */
4845 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
4846 " `%s' can not be used when making a shared object"),
4848 h
->type
== STT_FUNC
? "function" : "data",
4849 h
->root
.root
.string
);
4850 bfd_set_error (bfd_error_bad_value
);
4855 /* Note that sgot is not involved in this
4856 calculation. We always want the start of .got.plt. If we
4857 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4858 permitted by the ABI, we might have to change this
4860 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4861 + htab
->elf
.sgotplt
->output_offset
;
4864 case R_X86_64_GOTPC32
:
4865 case R_X86_64_GOTPC64
:
4866 /* Use global offset table as symbol value. */
4867 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4868 + htab
->elf
.sgotplt
->output_offset
;
4869 unresolved_reloc
= FALSE
;
4872 case R_X86_64_PLTOFF64
:
4873 /* Relocation is PLT entry relative to GOT. For local
4874 symbols it's the symbol itself relative to GOT. */
4876 /* See PLT32 handling. */
4877 && (h
->plt
.offset
!= (bfd_vma
) -1
4878 || eh
->plt_got
.offset
!= (bfd_vma
) -1)
4879 && htab
->elf
.splt
!= NULL
)
4881 if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4883 /* Use the GOT PLT. */
4884 resolved_plt
= htab
->plt_got
;
4885 plt_offset
= eh
->plt_got
.offset
;
4887 else if (htab
->plt_second
!= NULL
)
4889 resolved_plt
= htab
->plt_second
;
4890 plt_offset
= eh
->plt_second
.offset
;
4894 resolved_plt
= htab
->elf
.splt
;
4895 plt_offset
= h
->plt
.offset
;
4898 relocation
= (resolved_plt
->output_section
->vma
4899 + resolved_plt
->output_offset
4901 unresolved_reloc
= FALSE
;
4904 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4905 + htab
->elf
.sgotplt
->output_offset
;
4908 case R_X86_64_PLT32
:
4909 case R_X86_64_PLT32_BND
:
4910 /* Relocation is to the entry for this symbol in the
4911 procedure linkage table. */
4913 /* Resolve a PLT32 reloc against a local symbol directly,
4914 without using the procedure linkage table. */
4918 if ((h
->plt
.offset
== (bfd_vma
) -1
4919 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4920 || htab
->elf
.splt
== NULL
)
4922 /* We didn't make a PLT entry for this symbol. This
4923 happens when statically linking PIC code, or when
4924 using -Bsymbolic. */
4928 if (h
->plt
.offset
!= (bfd_vma
) -1)
4930 if (htab
->plt_second
!= NULL
)
4932 resolved_plt
= htab
->plt_second
;
4933 plt_offset
= eh
->plt_second
.offset
;
4937 resolved_plt
= htab
->elf
.splt
;
4938 plt_offset
= h
->plt
.offset
;
4943 /* Use the GOT PLT. */
4944 resolved_plt
= htab
->plt_got
;
4945 plt_offset
= eh
->plt_got
.offset
;
4948 relocation
= (resolved_plt
->output_section
->vma
4949 + resolved_plt
->output_offset
4951 unresolved_reloc
= FALSE
;
4954 case R_X86_64_SIZE32
:
4955 case R_X86_64_SIZE64
:
4956 /* Set to symbol size. */
4957 relocation
= st_size
;
4963 case R_X86_64_PC32_BND
:
4964 /* Don't complain about -fPIC if the symbol is undefined when
4965 building executable unless it is unresolved weak symbol. */
4966 if ((input_section
->flags
& SEC_ALLOC
) != 0
4967 && (input_section
->flags
& SEC_READONLY
) != 0
4969 && ((bfd_link_executable (info
)
4970 && h
->root
.type
== bfd_link_hash_undefweak
4971 && !resolved_to_zero
)
4972 || (bfd_link_pic (info
)
4973 && !(bfd_link_pie (info
)
4974 && h
->root
.type
== bfd_link_hash_undefined
))))
4976 bfd_boolean fail
= FALSE
;
4978 = ((r_type
== R_X86_64_PC32
4979 || r_type
== R_X86_64_PC32_BND
)
4980 && is_32bit_relative_branch (contents
, rel
->r_offset
));
4982 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
4984 /* Symbol is referenced locally. Make sure it is
4985 defined locally or for a branch. */
4986 fail
= (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
))
4989 else if (!(bfd_link_pie (info
)
4990 && (h
->needs_copy
|| eh
->needs_copy
)))
4992 /* Symbol doesn't need copy reloc and isn't referenced
4993 locally. We only allow branch to symbol with
4994 non-default visibility. */
4996 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
5000 return elf_x86_64_need_pic (input_bfd
, input_section
,
5001 h
, NULL
, NULL
, howto
);
5010 /* FIXME: The ABI says the linker should make sure the value is
5011 the same when it's zeroextended to 64 bit. */
5014 if ((input_section
->flags
& SEC_ALLOC
) == 0)
5017 /* Don't copy a pc-relative relocation into the output file
5018 if the symbol needs copy reloc or the symbol is undefined
5019 when building executable. Copy dynamic function pointer
5020 relocations. Don't generate dynamic relocations against
5021 resolved undefined weak symbols in PIE. */
5022 if ((bfd_link_pic (info
)
5023 && !(bfd_link_pie (info
)
5027 || h
->root
.type
== bfd_link_hash_undefined
)
5028 && (IS_X86_64_PCREL_TYPE (r_type
)
5029 || r_type
== R_X86_64_SIZE32
5030 || r_type
== R_X86_64_SIZE64
))
5032 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5033 && !resolved_to_zero
)
5034 || h
->root
.type
!= bfd_link_hash_undefweak
))
5035 && ((! IS_X86_64_PCREL_TYPE (r_type
)
5036 && r_type
!= R_X86_64_SIZE32
5037 && r_type
!= R_X86_64_SIZE64
)
5038 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
5039 || (ELIMINATE_COPY_RELOCS
5040 && !bfd_link_pic (info
)
5044 || eh
->func_pointer_refcount
> 0
5045 || (h
->root
.type
== bfd_link_hash_undefweak
5046 && !resolved_to_zero
))
5047 && ((h
->def_dynamic
&& !h
->def_regular
)
5048 /* Undefined weak symbol is bound locally when
5050 || h
->root
.type
== bfd_link_hash_undefined
)))
5052 Elf_Internal_Rela outrel
;
5053 bfd_boolean skip
, relocate
;
5056 /* When generating a shared object, these relocations
5057 are copied into the output file to be resolved at run
5063 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5065 if (outrel
.r_offset
== (bfd_vma
) -1)
5067 else if (outrel
.r_offset
== (bfd_vma
) -2)
5068 skip
= TRUE
, relocate
= TRUE
;
5070 outrel
.r_offset
+= (input_section
->output_section
->vma
5071 + input_section
->output_offset
);
5074 memset (&outrel
, 0, sizeof outrel
);
5076 /* h->dynindx may be -1 if this symbol was marked to
5080 && (IS_X86_64_PCREL_TYPE (r_type
)
5081 || !(bfd_link_executable (info
)
5082 || SYMBOLIC_BIND (info
, h
))
5083 || ! h
->def_regular
))
5085 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
5086 outrel
.r_addend
= rel
->r_addend
;
5090 /* This symbol is local, or marked to become local.
5091 When relocation overflow check is disabled, we
5092 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
5093 if (r_type
== htab
->pointer_r_type
5094 || (r_type
== R_X86_64_32
5095 && info
->no_reloc_overflow_check
))
5098 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
5099 outrel
.r_addend
= relocation
+ rel
->r_addend
;
5101 else if (r_type
== R_X86_64_64
5102 && !ABI_64_P (output_bfd
))
5105 outrel
.r_info
= htab
->r_info (0,
5106 R_X86_64_RELATIVE64
);
5107 outrel
.r_addend
= relocation
+ rel
->r_addend
;
5108 /* Check addend overflow. */
5109 if ((outrel
.r_addend
& 0x80000000)
5110 != (rel
->r_addend
& 0x80000000))
5113 int addend
= rel
->r_addend
;
5114 if (h
&& h
->root
.root
.string
)
5115 name
= h
->root
.root
.string
;
5117 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
5121 /* xgettext:c-format */
5122 (_("%B: addend -0x%x in relocation %s against "
5123 "symbol `%s' at 0x%lx in section `%A' is "
5125 input_bfd
, addend
, howto
->name
, name
,
5126 (unsigned long) rel
->r_offset
, input_section
);
5129 /* xgettext:c-format */
5130 (_("%B: addend 0x%x in relocation %s against "
5131 "symbol `%s' at 0x%lx in section `%A' is "
5133 input_bfd
, addend
, howto
->name
, name
,
5134 (unsigned long) rel
->r_offset
, input_section
);
5135 bfd_set_error (bfd_error_bad_value
);
5143 if (bfd_is_abs_section (sec
))
5145 else if (sec
== NULL
|| sec
->owner
== NULL
)
5147 bfd_set_error (bfd_error_bad_value
);
5154 /* We are turning this relocation into one
5155 against a section symbol. It would be
5156 proper to subtract the symbol's value,
5157 osec->vma, from the emitted reloc addend,
5158 but ld.so expects buggy relocs. */
5159 osec
= sec
->output_section
;
5160 sindx
= elf_section_data (osec
)->dynindx
;
5163 asection
*oi
= htab
->elf
.text_index_section
;
5164 sindx
= elf_section_data (oi
)->dynindx
;
5166 BFD_ASSERT (sindx
!= 0);
5169 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
5170 outrel
.r_addend
= relocation
+ rel
->r_addend
;
5174 sreloc
= elf_section_data (input_section
)->sreloc
;
5176 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
5178 r
= bfd_reloc_notsupported
;
5179 goto check_relocation_error
;
5182 elf_append_rela (output_bfd
, sreloc
, &outrel
);
5184 /* If this reloc is against an external symbol, we do
5185 not want to fiddle with the addend. Otherwise, we
5186 need to include the symbol value so that it becomes
5187 an addend for the dynamic reloc. */
5194 case R_X86_64_TLSGD
:
5195 case R_X86_64_GOTPC32_TLSDESC
:
5196 case R_X86_64_TLSDESC_CALL
:
5197 case R_X86_64_GOTTPOFF
:
5198 tls_type
= GOT_UNKNOWN
;
5199 if (h
== NULL
&& local_got_offsets
)
5200 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
5202 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
5204 if (! elf_x86_64_tls_transition (info
, input_bfd
,
5205 input_section
, contents
,
5206 symtab_hdr
, sym_hashes
,
5207 &r_type
, tls_type
, rel
,
5208 relend
, h
, r_symndx
, TRUE
))
5211 if (r_type
== R_X86_64_TPOFF32
)
5213 bfd_vma roff
= rel
->r_offset
;
5215 BFD_ASSERT (! unresolved_reloc
);
5217 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
5219 /* GD->LE transition. For 64bit, change
5220 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5221 .word 0x6666; rex64; call __tls_get_addr@PLT
5223 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5225 call *__tls_get_addr@GOTPCREL(%rip)
5226 which may be converted to
5227 addr32 call __tls_get_addr
5230 leaq foo@tpoff(%rax), %rax
5232 leaq foo@tlsgd(%rip), %rdi
5233 .word 0x6666; rex64; call __tls_get_addr@PLT
5235 leaq foo@tlsgd(%rip), %rdi
5237 call *__tls_get_addr@GOTPCREL(%rip)
5238 which may be converted to
5239 addr32 call __tls_get_addr
5242 leaq foo@tpoff(%rax), %rax
5243 For largepic, change:
5244 leaq foo@tlsgd(%rip), %rdi
5245 movabsq $__tls_get_addr@pltoff, %rax
5250 leaq foo@tpoff(%rax), %rax
5251 nopw 0x0(%rax,%rax,1) */
5253 if (ABI_64_P (output_bfd
))
5255 if (contents
[roff
+ 5] == 0xb8)
5257 memcpy (contents
+ roff
- 3,
5258 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
5259 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5263 memcpy (contents
+ roff
- 4,
5264 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5268 memcpy (contents
+ roff
- 3,
5269 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5271 bfd_put_32 (output_bfd
,
5272 elf_x86_64_tpoff (info
, relocation
),
5273 contents
+ roff
+ 8 + largepic
);
5274 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
5275 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
5280 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
5282 /* GDesc -> LE transition.
5283 It's originally something like:
5284 leaq x@tlsdesc(%rip), %rax
5287 movl $x@tpoff, %rax. */
5289 unsigned int val
, type
;
5291 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
5292 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
5293 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
5294 contents
+ roff
- 3);
5295 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
5296 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
5297 contents
+ roff
- 1);
5298 bfd_put_32 (output_bfd
,
5299 elf_x86_64_tpoff (info
, relocation
),
5303 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
5305 /* GDesc -> LE transition.
5310 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
5311 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
5314 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
5316 /* IE->LE transition:
5317 For 64bit, originally it can be one of:
5318 movq foo@gottpoff(%rip), %reg
5319 addq foo@gottpoff(%rip), %reg
5322 leaq foo(%reg), %reg
5324 For 32bit, originally it can be one of:
5325 movq foo@gottpoff(%rip), %reg
5326 addl foo@gottpoff(%rip), %reg
5329 leal foo(%reg), %reg
5332 unsigned int val
, type
, reg
;
5335 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
5338 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
5339 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
5345 bfd_put_8 (output_bfd
, 0x49,
5346 contents
+ roff
- 3);
5347 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
5348 bfd_put_8 (output_bfd
, 0x41,
5349 contents
+ roff
- 3);
5350 bfd_put_8 (output_bfd
, 0xc7,
5351 contents
+ roff
- 2);
5352 bfd_put_8 (output_bfd
, 0xc0 | reg
,
5353 contents
+ roff
- 1);
5357 /* addq/addl -> addq/addl - addressing with %rsp/%r12
5360 bfd_put_8 (output_bfd
, 0x49,
5361 contents
+ roff
- 3);
5362 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
5363 bfd_put_8 (output_bfd
, 0x41,
5364 contents
+ roff
- 3);
5365 bfd_put_8 (output_bfd
, 0x81,
5366 contents
+ roff
- 2);
5367 bfd_put_8 (output_bfd
, 0xc0 | reg
,
5368 contents
+ roff
- 1);
5372 /* addq/addl -> leaq/leal */
5374 bfd_put_8 (output_bfd
, 0x4d,
5375 contents
+ roff
- 3);
5376 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
5377 bfd_put_8 (output_bfd
, 0x45,
5378 contents
+ roff
- 3);
5379 bfd_put_8 (output_bfd
, 0x8d,
5380 contents
+ roff
- 2);
5381 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
5382 contents
+ roff
- 1);
5384 bfd_put_32 (output_bfd
,
5385 elf_x86_64_tpoff (info
, relocation
),
5393 if (htab
->elf
.sgot
== NULL
)
5398 off
= h
->got
.offset
;
5399 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
5403 if (local_got_offsets
== NULL
)
5406 off
= local_got_offsets
[r_symndx
];
5407 offplt
= local_tlsdesc_gotents
[r_symndx
];
5414 Elf_Internal_Rela outrel
;
5418 if (htab
->elf
.srelgot
== NULL
)
5421 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
5423 if (GOT_TLS_GDESC_P (tls_type
))
5425 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
5426 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
5427 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
5428 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
5429 + htab
->elf
.sgotplt
->output_offset
5431 + htab
->sgotplt_jump_table_size
);
5432 sreloc
= htab
->elf
.srelplt
;
5434 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
5436 outrel
.r_addend
= 0;
5437 elf_append_rela (output_bfd
, sreloc
, &outrel
);
5440 sreloc
= htab
->elf
.srelgot
;
5442 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5443 + htab
->elf
.sgot
->output_offset
+ off
);
5445 if (GOT_TLS_GD_P (tls_type
))
5446 dr_type
= R_X86_64_DTPMOD64
;
5447 else if (GOT_TLS_GDESC_P (tls_type
))
5450 dr_type
= R_X86_64_TPOFF64
;
5452 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
5453 outrel
.r_addend
= 0;
5454 if ((dr_type
== R_X86_64_TPOFF64
5455 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
5456 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
5457 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
5459 elf_append_rela (output_bfd
, sreloc
, &outrel
);
5461 if (GOT_TLS_GD_P (tls_type
))
5465 BFD_ASSERT (! unresolved_reloc
);
5466 bfd_put_64 (output_bfd
,
5467 relocation
- elf_x86_64_dtpoff_base (info
),
5468 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
5472 bfd_put_64 (output_bfd
, 0,
5473 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
5474 outrel
.r_info
= htab
->r_info (indx
,
5476 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
5477 elf_append_rela (output_bfd
, sreloc
,
5486 local_got_offsets
[r_symndx
] |= 1;
5489 if (off
>= (bfd_vma
) -2
5490 && ! GOT_TLS_GDESC_P (tls_type
))
5492 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
5494 if (r_type
== R_X86_64_GOTPC32_TLSDESC
5495 || r_type
== R_X86_64_TLSDESC_CALL
)
5496 relocation
= htab
->elf
.sgotplt
->output_section
->vma
5497 + htab
->elf
.sgotplt
->output_offset
5498 + offplt
+ htab
->sgotplt_jump_table_size
;
5500 relocation
= htab
->elf
.sgot
->output_section
->vma
5501 + htab
->elf
.sgot
->output_offset
+ off
;
5502 unresolved_reloc
= FALSE
;
5506 bfd_vma roff
= rel
->r_offset
;
5508 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
5510 /* GD->IE transition. For 64bit, change
5511 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5512 .word 0x6666; rex64; call __tls_get_addr@PLT
5514 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5516 call *__tls_get_addr@GOTPCREL(%rip
5517 which may be converted to
5518 addr32 call __tls_get_addr
5521 addq foo@gottpoff(%rip), %rax
5523 leaq foo@tlsgd(%rip), %rdi
5524 .word 0x6666; rex64; call __tls_get_addr@PLT
5526 leaq foo@tlsgd(%rip), %rdi
5528 call *__tls_get_addr@GOTPCREL(%rip)
5529 which may be converted to
5530 addr32 call __tls_get_addr
5533 addq foo@gottpoff(%rip), %rax
5534 For largepic, change:
5535 leaq foo@tlsgd(%rip), %rdi
5536 movabsq $__tls_get_addr@pltoff, %rax
5541 addq foo@gottpoff(%rax), %rax
5542 nopw 0x0(%rax,%rax,1) */
5544 if (ABI_64_P (output_bfd
))
5546 if (contents
[roff
+ 5] == 0xb8)
5548 memcpy (contents
+ roff
- 3,
5549 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
5550 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5554 memcpy (contents
+ roff
- 4,
5555 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5559 memcpy (contents
+ roff
- 3,
5560 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5563 relocation
= (htab
->elf
.sgot
->output_section
->vma
5564 + htab
->elf
.sgot
->output_offset
+ off
5567 - input_section
->output_section
->vma
5568 - input_section
->output_offset
5570 bfd_put_32 (output_bfd
, relocation
,
5571 contents
+ roff
+ 8 + largepic
);
5572 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
5577 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
5579 /* GDesc -> IE transition.
5580 It's originally something like:
5581 leaq x@tlsdesc(%rip), %rax
5584 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
5586 /* Now modify the instruction as appropriate. To
5587 turn a leaq into a movq in the form we use it, it
5588 suffices to change the second byte from 0x8d to
5590 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
5592 bfd_put_32 (output_bfd
,
5593 htab
->elf
.sgot
->output_section
->vma
5594 + htab
->elf
.sgot
->output_offset
+ off
5596 - input_section
->output_section
->vma
5597 - input_section
->output_offset
5602 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
5604 /* GDesc -> IE transition.
5611 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
5612 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
5620 case R_X86_64_TLSLD
:
5621 if (! elf_x86_64_tls_transition (info
, input_bfd
,
5622 input_section
, contents
,
5623 symtab_hdr
, sym_hashes
,
5624 &r_type
, GOT_UNKNOWN
, rel
,
5625 relend
, h
, r_symndx
, TRUE
))
5628 if (r_type
!= R_X86_64_TLSLD
)
5630 /* LD->LE transition:
5631 leaq foo@tlsld(%rip), %rdi
5632 call __tls_get_addr@PLT
5633 For 64bit, we change it into:
5634 .word 0x6666; .byte 0x66; movq %fs:0, %rax
5635 For 32bit, we change it into:
5636 nopl 0x0(%rax); movl %fs:0, %eax
5638 leaq foo@tlsld(%rip), %rdi;
5639 call *__tls_get_addr@GOTPCREL(%rip)
5640 which may be converted to
5641 addr32 call __tls_get_addr
5642 For 64bit, we change it into:
5643 .word 0x6666; .word 0x6666; movq %fs:0, %rax
5644 For 32bit, we change it into:
5645 nopw 0x0(%rax); movl %fs:0, %eax
5646 For largepic, change:
5647 leaq foo@tlsgd(%rip), %rdi
5648 movabsq $__tls_get_addr@pltoff, %rax
5652 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
5655 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
5656 if (ABI_64_P (output_bfd
))
5658 if (contents
[rel
->r_offset
+ 5] == 0xb8)
5659 memcpy (contents
+ rel
->r_offset
- 3,
5660 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5661 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5662 else if (contents
[rel
->r_offset
+ 4] == 0xff
5663 || contents
[rel
->r_offset
+ 4] == 0x67)
5664 memcpy (contents
+ rel
->r_offset
- 3,
5665 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
5668 memcpy (contents
+ rel
->r_offset
- 3,
5669 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5673 if (contents
[rel
->r_offset
+ 4] == 0xff)
5674 memcpy (contents
+ rel
->r_offset
- 3,
5675 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
5678 memcpy (contents
+ rel
->r_offset
- 3,
5679 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5681 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
5682 and R_X86_64_PLTOFF64. */
5688 if (htab
->elf
.sgot
== NULL
)
5691 off
= htab
->tls_ld_got
.offset
;
5696 Elf_Internal_Rela outrel
;
5698 if (htab
->elf
.srelgot
== NULL
)
5701 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5702 + htab
->elf
.sgot
->output_offset
+ off
);
5704 bfd_put_64 (output_bfd
, 0,
5705 htab
->elf
.sgot
->contents
+ off
);
5706 bfd_put_64 (output_bfd
, 0,
5707 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
5708 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
5709 outrel
.r_addend
= 0;
5710 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
5712 htab
->tls_ld_got
.offset
|= 1;
5714 relocation
= htab
->elf
.sgot
->output_section
->vma
5715 + htab
->elf
.sgot
->output_offset
+ off
;
5716 unresolved_reloc
= FALSE
;
5719 case R_X86_64_DTPOFF32
:
5720 if (!bfd_link_executable (info
)
5721 || (input_section
->flags
& SEC_CODE
) == 0)
5722 relocation
-= elf_x86_64_dtpoff_base (info
);
5724 relocation
= elf_x86_64_tpoff (info
, relocation
);
5727 case R_X86_64_TPOFF32
:
5728 case R_X86_64_TPOFF64
:
5729 BFD_ASSERT (bfd_link_executable (info
));
5730 relocation
= elf_x86_64_tpoff (info
, relocation
);
5733 case R_X86_64_DTPOFF64
:
5734 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
5735 relocation
-= elf_x86_64_dtpoff_base (info
);
5742 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5743 because such sections are not SEC_ALLOC and thus ld.so will
5744 not process them. */
5745 if (unresolved_reloc
5746 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
5748 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5749 rel
->r_offset
) != (bfd_vma
) -1)
5752 /* xgettext:c-format */
5753 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5756 (long) rel
->r_offset
,
5758 h
->root
.root
.string
);
5763 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5764 contents
, rel
->r_offset
,
5765 relocation
, rel
->r_addend
);
5767 check_relocation_error
:
5768 if (r
!= bfd_reloc_ok
)
5773 name
= h
->root
.root
.string
;
5776 name
= bfd_elf_string_from_elf_section (input_bfd
,
5777 symtab_hdr
->sh_link
,
5782 name
= bfd_section_name (input_bfd
, sec
);
5785 if (r
== bfd_reloc_overflow
)
5786 (*info
->callbacks
->reloc_overflow
)
5787 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5788 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
5792 /* xgettext:c-format */
5793 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5794 input_bfd
, input_section
,
5795 (long) rel
->r_offset
, name
, (int) r
);
5806 Elf_Internal_Shdr
*rel_hdr
;
5807 size_t deleted
= rel
- wrel
;
5809 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
5810 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5811 if (rel_hdr
->sh_size
== 0)
5813 /* It is too late to remove an empty reloc section. Leave
5815 ??? What is wrong with an empty section??? */
5816 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
5819 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
5820 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5821 input_section
->reloc_count
-= deleted
;
5827 /* Finish up dynamic symbol handling. We set the contents of various
5828 dynamic sections here. */
5831 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
5832 struct bfd_link_info
*info
,
5833 struct elf_link_hash_entry
*h
,
5834 Elf_Internal_Sym
*sym
)
5836 struct elf_x86_64_link_hash_table
*htab
;
5837 bfd_boolean use_plt_second
;
5838 struct elf_x86_64_link_hash_entry
*eh
;
5839 bfd_boolean local_undefweak
;
5841 htab
= elf_x86_64_hash_table (info
);
5845 /* Use the second PLT section only if there is .plt section. */
5846 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
5848 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
5849 if (eh
->no_finish_dynamic_symbol
)
5852 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5853 resolved undefined weak symbols in executable so that their
5854 references have value 0 at run-time. */
5855 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
5859 if (h
->plt
.offset
!= (bfd_vma
) -1)
5862 bfd_vma got_offset
, plt_offset
;
5863 Elf_Internal_Rela rela
;
5865 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
5866 const struct elf_backend_data
*bed
;
5867 bfd_vma plt_got_pcrel_offset
;
5869 /* When building a static executable, use .iplt, .igot.plt and
5870 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5871 if (htab
->elf
.splt
!= NULL
)
5873 plt
= htab
->elf
.splt
;
5874 gotplt
= htab
->elf
.sgotplt
;
5875 relplt
= htab
->elf
.srelplt
;
5879 plt
= htab
->elf
.iplt
;
5880 gotplt
= htab
->elf
.igotplt
;
5881 relplt
= htab
->elf
.irelplt
;
5884 /* This symbol has an entry in the procedure linkage table. Set
5886 if ((h
->dynindx
== -1
5888 && !((h
->forced_local
|| bfd_link_executable (info
))
5890 && h
->type
== STT_GNU_IFUNC
))
5896 /* Get the index in the procedure linkage table which
5897 corresponds to this symbol. This is the index of this symbol
5898 in all the symbols for which we are making plt entries. The
5899 first entry in the procedure linkage table is reserved.
5901 Get the offset into the .got table of the entry that
5902 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5903 bytes. The first three are reserved for the dynamic linker.
5905 For static executables, we don't reserve anything. */
5907 if (plt
== htab
->elf
.splt
)
5909 got_offset
= (h
->plt
.offset
/ htab
->plt
.plt_entry_size
5910 - htab
->plt
.has_plt0
);
5911 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
5915 got_offset
= h
->plt
.offset
/ htab
->plt
.plt_entry_size
;
5916 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
5919 /* Fill in the entry in the procedure linkage table. */
5920 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
5921 htab
->plt
.plt_entry_size
);
5924 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
5925 htab
->non_lazy_plt
->plt_entry
,
5926 htab
->non_lazy_plt
->plt_entry_size
);
5928 resolved_plt
= htab
->plt_second
;
5929 plt_offset
= eh
->plt_second
.offset
;
5934 plt_offset
= h
->plt
.offset
;
5937 /* Insert the relocation positions of the plt section. */
5939 /* Put offset the PC-relative instruction referring to the GOT entry,
5940 subtracting the size of that instruction. */
5941 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
5942 + gotplt
->output_offset
5944 - resolved_plt
->output_section
->vma
5945 - resolved_plt
->output_offset
5947 - htab
->plt
.plt_got_insn_size
);
5949 /* Check PC-relative offset overflow in PLT entry. */
5950 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
5951 /* xgettext:c-format */
5952 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5953 output_bfd
, h
->root
.root
.string
);
5955 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
5956 (resolved_plt
->contents
+ plt_offset
5957 + htab
->plt
.plt_got_offset
));
5959 /* Fill in the entry in the global offset table, initially this
5960 points to the second part of the PLT entry. Leave the entry
5961 as zero for undefined weak symbol in PIE. No PLT relocation
5962 against undefined weak symbol in PIE. */
5963 if (!local_undefweak
)
5965 if (htab
->plt
.has_plt0
)
5966 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5967 + plt
->output_offset
5969 + htab
->lazy_plt
->plt_lazy_offset
),
5970 gotplt
->contents
+ got_offset
);
5972 /* Fill in the entry in the .rela.plt section. */
5973 rela
.r_offset
= (gotplt
->output_section
->vma
5974 + gotplt
->output_offset
5976 if (h
->dynindx
== -1
5977 || ((bfd_link_executable (info
)
5978 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5980 && h
->type
== STT_GNU_IFUNC
))
5982 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
5983 h
->root
.root
.string
,
5984 h
->root
.u
.def
.section
->owner
);
5986 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5987 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5988 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
5989 rela
.r_addend
= (h
->root
.u
.def
.value
5990 + h
->root
.u
.def
.section
->output_section
->vma
5991 + h
->root
.u
.def
.section
->output_offset
);
5992 /* R_X86_64_IRELATIVE comes last. */
5993 plt_index
= htab
->next_irelative_index
--;
5997 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
5999 plt_index
= htab
->next_jump_slot_index
++;
6002 /* Don't fill the second and third slots in PLT entry for
6003 static executables nor without PLT0. */
6004 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
6007 = h
->plt
.offset
+ htab
->lazy_plt
->plt_plt_insn_end
;
6009 /* Put relocation index. */
6010 bfd_put_32 (output_bfd
, plt_index
,
6011 (plt
->contents
+ h
->plt
.offset
6012 + htab
->lazy_plt
->plt_reloc_offset
));
6014 /* Put offset for jmp .PLT0 and check for overflow. We don't
6015 check relocation index for overflow since branch displacement
6016 will overflow first. */
6017 if (plt0_offset
> 0x80000000)
6018 /* xgettext:c-format */
6019 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
6020 output_bfd
, h
->root
.root
.string
);
6021 bfd_put_32 (output_bfd
, - plt0_offset
,
6022 (plt
->contents
+ h
->plt
.offset
6023 + htab
->lazy_plt
->plt_plt_offset
));
6026 bed
= get_elf_backend_data (output_bfd
);
6027 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
6028 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
6031 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
6033 bfd_vma got_offset
, plt_offset
;
6034 asection
*plt
, *got
;
6035 bfd_boolean got_after_plt
;
6036 int32_t got_pcrel_offset
;
6038 /* Set the entry in the GOT procedure linkage table. */
6039 plt
= htab
->plt_got
;
6040 got
= htab
->elf
.sgot
;
6041 got_offset
= h
->got
.offset
;
6043 if (got_offset
== (bfd_vma
) -1
6044 || (h
->type
== STT_GNU_IFUNC
&& h
->def_regular
)
6049 /* Use the non-lazy PLT entry template for the GOT PLT since they
6050 are the identical. */
6051 /* Fill in the entry in the GOT procedure linkage table. */
6052 plt_offset
= eh
->plt_got
.offset
;
6053 memcpy (plt
->contents
+ plt_offset
,
6054 htab
->non_lazy_plt
->plt_entry
,
6055 htab
->non_lazy_plt
->plt_entry_size
);
6057 /* Put offset the PC-relative instruction referring to the GOT
6058 entry, subtracting the size of that instruction. */
6059 got_pcrel_offset
= (got
->output_section
->vma
6060 + got
->output_offset
6062 - plt
->output_section
->vma
6063 - plt
->output_offset
6065 - htab
->non_lazy_plt
->plt_got_insn_size
);
6067 /* Check PC-relative offset overflow in GOT PLT entry. */
6068 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
6069 if ((got_after_plt
&& got_pcrel_offset
< 0)
6070 || (!got_after_plt
&& got_pcrel_offset
> 0))
6071 /* xgettext:c-format */
6072 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
6073 output_bfd
, h
->root
.root
.string
);
6075 bfd_put_32 (output_bfd
, got_pcrel_offset
,
6076 (plt
->contents
+ plt_offset
6077 + htab
->non_lazy_plt
->plt_got_offset
));
6080 if (!local_undefweak
6082 && (h
->plt
.offset
!= (bfd_vma
) -1
6083 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
6085 /* Mark the symbol as undefined, rather than as defined in
6086 the .plt section. Leave the value if there were any
6087 relocations where pointer equality matters (this is a clue
6088 for the dynamic linker, to make function pointer
6089 comparisons work between an application and shared
6090 library), otherwise set it to zero. If a function is only
6091 called from a binary, there is no need to slow down
6092 shared libraries because of that. */
6093 sym
->st_shndx
= SHN_UNDEF
;
6094 if (!h
->pointer_equality_needed
)
6098 /* Don't generate dynamic GOT relocation against undefined weak
6099 symbol in executable. */
6100 if (h
->got
.offset
!= (bfd_vma
) -1
6101 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
6102 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
6103 && !local_undefweak
)
6105 Elf_Internal_Rela rela
;
6106 asection
*relgot
= htab
->elf
.srelgot
;
6108 /* This symbol has an entry in the global offset table. Set it
6110 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
6113 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
6114 + htab
->elf
.sgot
->output_offset
6115 + (h
->got
.offset
&~ (bfd_vma
) 1));
6117 /* If this is a static link, or it is a -Bsymbolic link and the
6118 symbol is defined locally or was forced to be local because
6119 of a version file, we just want to emit a RELATIVE reloc.
6120 The entry in the global offset table will already have been
6121 initialized in the relocate_section function. */
6123 && h
->type
== STT_GNU_IFUNC
)
6125 if (h
->plt
.offset
== (bfd_vma
) -1)
6127 /* STT_GNU_IFUNC is referenced without PLT. */
6128 if (htab
->elf
.splt
== NULL
)
6130 /* use .rel[a].iplt section to store .got relocations
6131 in static executable. */
6132 relgot
= htab
->elf
.irelplt
;
6134 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
6136 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
6138 h
->root
.root
.string
,
6139 h
->root
.u
.def
.section
->owner
);
6141 rela
.r_info
= htab
->r_info (0,
6142 R_X86_64_IRELATIVE
);
6143 rela
.r_addend
= (h
->root
.u
.def
.value
6144 + h
->root
.u
.def
.section
->output_section
->vma
6145 + h
->root
.u
.def
.section
->output_offset
);
6150 else if (bfd_link_pic (info
))
6152 /* Generate R_X86_64_GLOB_DAT. */
6160 if (!h
->pointer_equality_needed
)
6163 /* For non-shared object, we can't use .got.plt, which
6164 contains the real function addres if we need pointer
6165 equality. We load the GOT entry with the PLT entry. */
6166 if (htab
->plt_second
!= NULL
)
6168 plt
= htab
->plt_second
;
6169 plt_offset
= eh
->plt_second
.offset
;
6173 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
6174 plt_offset
= h
->plt
.offset
;
6176 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
6177 + plt
->output_offset
6179 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
6183 else if (bfd_link_pic (info
)
6184 && SYMBOL_REFERENCES_LOCAL (info
, h
))
6186 if (!h
->def_regular
)
6188 BFD_ASSERT((h
->got
.offset
& 1) != 0);
6189 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
6190 rela
.r_addend
= (h
->root
.u
.def
.value
6191 + h
->root
.u
.def
.section
->output_section
->vma
6192 + h
->root
.u
.def
.section
->output_offset
);
6196 BFD_ASSERT((h
->got
.offset
& 1) == 0);
6198 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
6199 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
6200 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
6204 elf_append_rela (output_bfd
, relgot
, &rela
);
6209 Elf_Internal_Rela rela
;
6212 /* This symbol needs a copy reloc. Set it up. */
6214 if (h
->dynindx
== -1
6215 || (h
->root
.type
!= bfd_link_hash_defined
6216 && h
->root
.type
!= bfd_link_hash_defweak
)
6217 || htab
->elf
.srelbss
== NULL
6218 || htab
->elf
.sreldynrelro
== NULL
)
6221 rela
.r_offset
= (h
->root
.u
.def
.value
6222 + h
->root
.u
.def
.section
->output_section
->vma
6223 + h
->root
.u
.def
.section
->output_offset
);
6224 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
6226 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
6227 s
= htab
->elf
.sreldynrelro
;
6229 s
= htab
->elf
.srelbss
;
6230 elf_append_rela (output_bfd
, s
, &rela
);
6236 /* Finish up local dynamic symbol handling. We set the contents of
6237 various dynamic sections here. */
6240 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
6242 struct elf_link_hash_entry
*h
6243 = (struct elf_link_hash_entry
*) *slot
;
6244 struct bfd_link_info
*info
6245 = (struct bfd_link_info
*) inf
;
6247 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
6251 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
6252 here since undefined weak symbol may not be dynamic and may not be
6253 called for elf_x86_64_finish_dynamic_symbol. */
6256 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
6259 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
6260 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
6262 if (h
->root
.type
!= bfd_link_hash_undefweak
6263 || h
->dynindx
!= -1)
6266 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
6270 /* Used to decide how to sort relocs in an optimal manner for the
6271 dynamic linker, before writing them out. */
6273 static enum elf_reloc_type_class
6274 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info
,
6275 const asection
*rel_sec ATTRIBUTE_UNUSED
,
6276 const Elf_Internal_Rela
*rela
)
6278 bfd
*abfd
= info
->output_bfd
;
6279 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6280 struct elf_x86_64_link_hash_table
*htab
= elf_x86_64_hash_table (info
);
6282 if (htab
->elf
.dynsym
!= NULL
6283 && htab
->elf
.dynsym
->contents
!= NULL
)
6285 /* Check relocation against STT_GNU_IFUNC symbol if there are
6287 unsigned long r_symndx
= htab
->r_sym (rela
->r_info
);
6288 if (r_symndx
!= STN_UNDEF
)
6290 Elf_Internal_Sym sym
;
6291 if (!bed
->s
->swap_symbol_in (abfd
,
6292 (htab
->elf
.dynsym
->contents
6293 + r_symndx
* bed
->s
->sizeof_sym
),
6297 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
6298 return reloc_class_ifunc
;
6302 switch ((int) ELF32_R_TYPE (rela
->r_info
))
6304 case R_X86_64_IRELATIVE
:
6305 return reloc_class_ifunc
;
6306 case R_X86_64_RELATIVE
:
6307 case R_X86_64_RELATIVE64
:
6308 return reloc_class_relative
;
6309 case R_X86_64_JUMP_SLOT
:
6310 return reloc_class_plt
;
6312 return reloc_class_copy
;
6314 return reloc_class_normal
;
6318 /* Finish up the dynamic sections. */
6321 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
6322 struct bfd_link_info
*info
)
6324 struct elf_x86_64_link_hash_table
*htab
;
6328 htab
= elf_x86_64_hash_table (info
);
6332 dynobj
= htab
->elf
.dynobj
;
6333 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
6335 if (htab
->elf
.dynamic_sections_created
)
6337 bfd_byte
*dyncon
, *dynconend
;
6338 const struct elf_backend_data
*bed
;
6339 bfd_size_type sizeof_dyn
;
6341 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
6344 bed
= get_elf_backend_data (dynobj
);
6345 sizeof_dyn
= bed
->s
->sizeof_dyn
;
6346 dyncon
= sdyn
->contents
;
6347 dynconend
= sdyn
->contents
+ sdyn
->size
;
6348 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
6350 Elf_Internal_Dyn dyn
;
6353 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
6361 s
= htab
->elf
.sgotplt
;
6362 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
6366 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
6370 s
= htab
->elf
.srelplt
->output_section
;
6371 dyn
.d_un
.d_val
= s
->size
;
6374 case DT_TLSDESC_PLT
:
6376 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
6377 + htab
->tlsdesc_plt
;
6380 case DT_TLSDESC_GOT
:
6382 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
6383 + htab
->tlsdesc_got
;
6387 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
6390 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
6392 elf_section_data (htab
->elf
.splt
->output_section
)
6393 ->this_hdr
.sh_entsize
= htab
->plt
.plt_entry_size
;
6395 if (htab
->plt
.has_plt0
)
6397 /* Fill in the special first entry in the procedure linkage
6399 memcpy (htab
->elf
.splt
->contents
,
6400 htab
->lazy_plt
->plt0_entry
,
6401 htab
->lazy_plt
->plt_entry_size
);
6402 /* Add offset for pushq GOT+8(%rip), since the instruction
6403 uses 6 bytes subtract this value. */
6404 bfd_put_32 (output_bfd
,
6405 (htab
->elf
.sgotplt
->output_section
->vma
6406 + htab
->elf
.sgotplt
->output_offset
6408 - htab
->elf
.splt
->output_section
->vma
6409 - htab
->elf
.splt
->output_offset
6411 (htab
->elf
.splt
->contents
6412 + htab
->lazy_plt
->plt0_got1_offset
));
6413 /* Add offset for the PC-relative instruction accessing
6414 GOT+16, subtracting the offset to the end of that
6416 bfd_put_32 (output_bfd
,
6417 (htab
->elf
.sgotplt
->output_section
->vma
6418 + htab
->elf
.sgotplt
->output_offset
6420 - htab
->elf
.splt
->output_section
->vma
6421 - htab
->elf
.splt
->output_offset
6422 - htab
->lazy_plt
->plt0_got2_insn_end
),
6423 (htab
->elf
.splt
->contents
6424 + htab
->lazy_plt
->plt0_got2_offset
));
6426 if (htab
->tlsdesc_plt
)
6428 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
6429 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
6431 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
6432 htab
->lazy_plt
->plt0_entry
,
6433 htab
->lazy_plt
->plt_entry_size
);
6435 /* Add offset for pushq GOT+8(%rip), since the
6436 instruction uses 6 bytes subtract this value. */
6437 bfd_put_32 (output_bfd
,
6438 (htab
->elf
.sgotplt
->output_section
->vma
6439 + htab
->elf
.sgotplt
->output_offset
6441 - htab
->elf
.splt
->output_section
->vma
6442 - htab
->elf
.splt
->output_offset
6445 (htab
->elf
.splt
->contents
6447 + htab
->lazy_plt
->plt0_got1_offset
));
6448 /* Add offset for the PC-relative instruction accessing
6449 GOT+TDG, where TDG stands for htab->tlsdesc_got,
6450 subtracting the offset to the end of that
6452 bfd_put_32 (output_bfd
,
6453 (htab
->elf
.sgot
->output_section
->vma
6454 + htab
->elf
.sgot
->output_offset
6456 - htab
->elf
.splt
->output_section
->vma
6457 - htab
->elf
.splt
->output_offset
6459 - htab
->lazy_plt
->plt0_got2_insn_end
),
6460 (htab
->elf
.splt
->contents
6462 + htab
->lazy_plt
->plt0_got2_offset
));
6468 if (htab
->plt_got
!= NULL
&& htab
->plt_got
->size
> 0)
6469 elf_section_data (htab
->plt_got
->output_section
)
6470 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
6472 if (htab
->plt_second
!= NULL
&& htab
->plt_second
->size
> 0)
6473 elf_section_data (htab
->plt_second
->output_section
)
6474 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
6476 /* GOT is always created in setup_gnu_properties. But it may not be
6478 if (htab
->elf
.sgotplt
&& htab
->elf
.sgotplt
->size
> 0)
6480 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
6483 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
6487 /* Set the first entry in the global offset table to the address of
6488 the dynamic section. */
6490 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
6492 bfd_put_64 (output_bfd
,
6493 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
6494 htab
->elf
.sgotplt
->contents
);
6495 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6496 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
6497 htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
6498 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
6499 htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
6501 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
6505 /* Adjust .eh_frame for .plt section. */
6506 if (htab
->plt_eh_frame
!= NULL
6507 && htab
->plt_eh_frame
->contents
!= NULL
)
6509 if (htab
->elf
.splt
!= NULL
6510 && htab
->elf
.splt
->size
!= 0
6511 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
6512 && htab
->elf
.splt
->output_section
!= NULL
6513 && htab
->plt_eh_frame
->output_section
!= NULL
)
6515 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
6516 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
6517 + htab
->plt_eh_frame
->output_offset
6518 + PLT_FDE_START_OFFSET
;
6519 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
6520 htab
->plt_eh_frame
->contents
6521 + PLT_FDE_START_OFFSET
);
6523 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
6525 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
6527 htab
->plt_eh_frame
->contents
))
6532 /* Adjust .eh_frame for .plt.got section. */
6533 if (htab
->plt_got_eh_frame
!= NULL
6534 && htab
->plt_got_eh_frame
->contents
!= NULL
)
6536 if (htab
->plt_got
!= NULL
6537 && htab
->plt_got
->size
!= 0
6538 && (htab
->plt_got
->flags
& SEC_EXCLUDE
) == 0
6539 && htab
->plt_got
->output_section
!= NULL
6540 && htab
->plt_got_eh_frame
->output_section
!= NULL
)
6542 bfd_vma plt_start
= htab
->plt_got
->output_section
->vma
;
6543 bfd_vma eh_frame_start
= htab
->plt_got_eh_frame
->output_section
->vma
6544 + htab
->plt_got_eh_frame
->output_offset
6545 + PLT_FDE_START_OFFSET
;
6546 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
6547 htab
->plt_got_eh_frame
->contents
6548 + PLT_FDE_START_OFFSET
);
6550 if (htab
->plt_got_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
6552 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
6553 htab
->plt_got_eh_frame
,
6554 htab
->plt_got_eh_frame
->contents
))
6559 /* Adjust .eh_frame for the second PLT section. */
6560 if (htab
->plt_second_eh_frame
!= NULL
6561 && htab
->plt_second_eh_frame
->contents
!= NULL
)
6563 if (htab
->plt_second
!= NULL
6564 && htab
->plt_second
->size
!= 0
6565 && (htab
->plt_second
->flags
& SEC_EXCLUDE
) == 0
6566 && htab
->plt_second
->output_section
!= NULL
6567 && htab
->plt_second_eh_frame
->output_section
!= NULL
)
6569 bfd_vma plt_start
= htab
->plt_second
->output_section
->vma
;
6570 bfd_vma eh_frame_start
6571 = (htab
->plt_second_eh_frame
->output_section
->vma
6572 + htab
->plt_second_eh_frame
->output_offset
6573 + PLT_FDE_START_OFFSET
);
6574 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
6575 htab
->plt_second_eh_frame
->contents
6576 + PLT_FDE_START_OFFSET
);
6578 if (htab
->plt_second_eh_frame
->sec_info_type
6579 == SEC_INFO_TYPE_EH_FRAME
)
6581 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
6582 htab
->plt_second_eh_frame
,
6583 htab
->plt_second_eh_frame
->contents
))
6588 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
6589 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
6592 /* Fill PLT entries for undefined weak symbols in PIE. */
6593 if (bfd_link_pie (info
))
6594 bfd_hash_traverse (&info
->hash
->table
,
6595 elf_x86_64_pie_finish_undefweak_symbol
,
6601 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6602 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6603 It has to be done before elf_link_sort_relocs is called so that
6604 dynamic relocations are properly sorted. */
6607 elf_x86_64_output_arch_local_syms
6608 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
6609 struct bfd_link_info
*info
,
6610 void *flaginfo ATTRIBUTE_UNUSED
,
6611 int (*func
) (void *, const char *,
6614 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
6616 struct elf_x86_64_link_hash_table
*htab
= elf_x86_64_hash_table (info
);
6620 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6621 htab_traverse (htab
->loc_hash_table
,
6622 elf_x86_64_finish_local_dynamic_symbol
,
6628 /* Sort relocs into address order. */
6631 compare_relocs (const void *ap
, const void *bp
)
6633 const arelent
*a
= * (const arelent
**) ap
;
6634 const arelent
*b
= * (const arelent
**) bp
;
6636 if (a
->address
> b
->address
)
6638 else if (a
->address
< b
->address
)
6644 enum elf_x86_64_plt_type
6648 plt_second
= 1 << 1,
6652 struct elf_x86_64_plt
6657 enum elf_x86_64_plt_type type
;
6658 unsigned int plt_got_offset
;
6659 unsigned int plt_got_insn_size
;
6660 unsigned int plt_entry_size
;
6664 /* Forward declaration. */
6665 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt
;
6667 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
6668 dynamic relocations. */
6671 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
6672 long symcount ATTRIBUTE_UNUSED
,
6673 asymbol
**syms ATTRIBUTE_UNUSED
,
6678 long size
, count
, i
, n
;
6680 unsigned int plt_got_offset
, plt_entry_size
, plt_got_insn_size
;
6682 bfd_byte
*plt_contents
;
6683 long dynrelcount
, relsize
;
6684 arelent
**dynrelbuf
;
6685 const struct elf_x86_64_lazy_plt_layout
*lazy_plt
;
6686 const struct elf_x86_64_non_lazy_plt_layout
*non_lazy_plt
;
6687 const struct elf_x86_64_lazy_plt_layout
*lazy_bnd_plt
;
6688 const struct elf_x86_64_non_lazy_plt_layout
*non_lazy_bnd_plt
;
6689 const struct elf_x86_64_lazy_plt_layout
*lazy_ibt_plt
;
6690 const struct elf_x86_64_non_lazy_plt_layout
*non_lazy_ibt_plt
;
6693 enum elf_x86_64_plt_type plt_type
;
6694 struct elf_x86_64_plt plts
[] =
6696 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
6697 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
6698 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
6699 { ".plt.bnd", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
6700 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
6705 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
6708 if (dynsymcount
<= 0)
6711 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
6715 dynrelbuf
= (arelent
**) bfd_malloc (relsize
);
6716 if (dynrelbuf
== NULL
)
6719 dynrelcount
= bfd_canonicalize_dynamic_reloc (abfd
, dynrelbuf
,
6722 /* Sort the relocs by address. */
6723 qsort (dynrelbuf
, dynrelcount
, sizeof (arelent
*), compare_relocs
);
6725 if (get_elf_x86_64_backend_data (abfd
)->os
== is_normal
)
6727 lazy_plt
= &elf_x86_64_lazy_plt
;
6728 non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
6729 lazy_bnd_plt
= &elf_x86_64_lazy_bnd_plt
;
6730 non_lazy_bnd_plt
= &elf_x86_64_non_lazy_bnd_plt
;
6731 if (ABI_64_P (abfd
))
6733 lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
6734 non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
6738 lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
6739 non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
6744 lazy_plt
= &elf_x86_64_nacl_plt
;
6745 non_lazy_plt
= NULL
;
6746 lazy_bnd_plt
= NULL
;
6747 non_lazy_bnd_plt
= NULL
;
6748 lazy_ibt_plt
= NULL
;
6749 non_lazy_ibt_plt
= NULL
;
6753 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6755 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
6759 /* Get the PLT section contents. */
6760 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
6761 if (plt_contents
== NULL
)
6763 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
6764 plt_contents
, 0, plt
->size
))
6766 free (plt_contents
);
6770 /* Check what kind of PLT it is. */
6771 plt_type
= plt_unknown
;
6772 if (plts
[j
].type
== plt_unknown
)
6774 /* Match lazy PLT first. Need to check the first two
6776 if ((memcmp (plt_contents
, lazy_plt
->plt0_entry
,
6777 lazy_plt
->plt0_got1_offset
) == 0)
6778 && (memcmp (plt_contents
+ 6, lazy_plt
->plt0_entry
+ 6,
6780 plt_type
= plt_lazy
;
6781 else if (lazy_bnd_plt
!= NULL
6782 && (memcmp (plt_contents
, lazy_bnd_plt
->plt0_entry
,
6783 lazy_bnd_plt
->plt0_got1_offset
) == 0)
6784 && (memcmp (plt_contents
+ 6,
6785 lazy_bnd_plt
->plt0_entry
+ 6, 3) == 0))
6787 plt_type
= plt_lazy
| plt_second
;
6788 /* The fist entry in the lazy IBT PLT is the same as the
6790 if ((memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
6791 lazy_ibt_plt
->plt_entry
,
6792 lazy_ibt_plt
->plt_got_offset
) == 0))
6793 lazy_plt
= lazy_ibt_plt
;
6795 lazy_plt
= lazy_bnd_plt
;
6799 if (non_lazy_plt
!= NULL
6800 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
))
6802 /* Match non-lazy PLT. */
6803 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
6804 non_lazy_plt
->plt_got_offset
) == 0)
6805 plt_type
= plt_non_lazy
;
6808 if (plt_type
== plt_unknown
|| plt_type
== plt_second
)
6810 if (non_lazy_bnd_plt
!= NULL
6811 && (memcmp (plt_contents
, non_lazy_bnd_plt
->plt_entry
,
6812 non_lazy_bnd_plt
->plt_got_offset
) == 0))
6814 /* Match BND PLT. */
6815 plt_type
= plt_second
;
6816 non_lazy_plt
= non_lazy_bnd_plt
;
6818 else if (non_lazy_ibt_plt
!= NULL
6819 && (memcmp (plt_contents
,
6820 non_lazy_ibt_plt
->plt_entry
,
6821 non_lazy_ibt_plt
->plt_got_offset
) == 0))
6823 /* Match IBT PLT. */
6824 plt_type
= plt_second
;
6825 non_lazy_plt
= non_lazy_ibt_plt
;
6829 if (plt_type
== plt_unknown
)
6833 plts
[j
].type
= plt_type
;
6835 if ((plt_type
& plt_lazy
))
6837 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
6838 plts
[j
].plt_got_insn_size
= lazy_plt
->plt_got_insn_size
;
6839 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
6840 /* Skip PLT0 in lazy PLT. */
6845 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
6846 plts
[j
].plt_got_insn_size
= non_lazy_plt
->plt_got_insn_size
;
6847 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
6851 /* Skip lazy PLT when the second PLT is used. */
6852 if (plt_type
== (plt_lazy
| plt_second
))
6856 n
= plt
->size
/ plts
[j
].plt_entry_size
;
6861 plts
[j
].contents
= plt_contents
;
6864 size
= count
* sizeof (asymbol
);
6865 s
= *ret
= (asymbol
*) bfd_zmalloc (size
);
6869 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6870 if (plts
[j
].contents
!= NULL
)
6871 free (plts
[j
].contents
);
6876 /* Check for each PLT section. */
6879 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6880 if ((plt_contents
= plts
[j
].contents
) != NULL
)
6885 plt_got_offset
= plts
[j
].plt_got_offset
;
6886 plt_got_insn_size
= plts
[j
].plt_got_insn_size
;
6887 plt_entry_size
= plts
[j
].plt_entry_size
;
6891 if ((plts
[j
].type
& plt_lazy
))
6893 /* Skip PLT0 in lazy PLT. */
6895 offset
= plt_entry_size
;
6903 /* Check each PLT entry against dynamic relocations. */
6904 for (; k
< plts
[j
].count
; k
++)
6911 /* Get the PC-relative offset, a signed 32-bit integer. */
6912 off
= H_GET_32 (abfd
, (plt_contents
+ offset
6914 got_vma
= plt
->vma
+ offset
+ off
+ plt_got_insn_size
;
6916 /* Binary search. */
6920 while ((min
+ 1) < max
)
6924 mid
= (min
+ max
) / 2;
6926 if (got_vma
> r
->address
)
6928 else if (got_vma
< r
->address
)
6937 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6938 if (got_vma
== p
->address
6940 && (p
->howto
->type
== R_X86_64_JUMP_SLOT
6941 || p
->howto
->type
== R_X86_64_GLOB_DAT
6942 || p
->howto
->type
== R_X86_64_IRELATIVE
))
6944 *s
= **p
->sym_ptr_ptr
;
6945 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6946 set. Since we are defining a symbol, ensure one
6948 if ((s
->flags
& BSF_LOCAL
) == 0)
6949 s
->flags
|= BSF_GLOBAL
;
6950 s
->flags
|= BSF_SYNTHETIC
;
6951 /* This is no longer a section symbol. */
6952 s
->flags
&= ~BSF_SECTION_SYM
;
6954 s
->the_bfd
= plt
->owner
;
6956 /* Store relocation for later use. */
6958 /* Add @plt to function name later. */
6959 size
+= strlen (s
->name
) + sizeof ("@plt");
6961 size
+= sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd
);
6965 offset
+= plt_entry_size
;
6969 /* PLT entries with R_X86_64_TLSDESC relocations are skipped. */
6975 /* Allocate space for @plt suffixes. */
6976 names
= (char *) bfd_malloc (size
);
6981 for (i
= 0; i
< count
; i
++)
6983 /* Add @plt to function name. */
6984 arelent
*p
= (arelent
*) s
->udata
.p
;
6987 size
= strlen (s
->name
);
6988 memcpy (names
, s
->name
, size
);
6995 memcpy (names
, "+0x", sizeof ("+0x") - 1);
6996 names
+= sizeof ("+0x") - 1;
6997 bfd_sprintf_vma (abfd
, buf
, p
->addend
);
6998 for (a
= buf
; *a
== '0'; ++a
)
7001 memcpy (names
, a
, size
);
7004 memcpy (names
, "@plt", sizeof ("@plt"));
7005 names
+= sizeof ("@plt");
7009 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
7010 if (plts
[j
].contents
!= NULL
)
7011 free (plts
[j
].contents
);
7018 /* Handle an x86-64 specific section when reading an object file. This
7019 is called when elfcode.h finds a section with an unknown type. */
7022 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
7023 const char *name
, int shindex
)
7025 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
7028 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
7034 /* Hook called by the linker routine which adds symbols from an object
7035 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
7039 elf_x86_64_add_symbol_hook (bfd
*abfd
,
7040 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
7041 Elf_Internal_Sym
*sym
,
7042 const char **namep ATTRIBUTE_UNUSED
,
7043 flagword
*flagsp ATTRIBUTE_UNUSED
,
7049 switch (sym
->st_shndx
)
7051 case SHN_X86_64_LCOMMON
:
7052 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
7055 lcomm
= bfd_make_section_with_flags (abfd
,
7059 | SEC_LINKER_CREATED
));
7062 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
7065 *valp
= sym
->st_size
;
7073 /* Given a BFD section, try to locate the corresponding ELF section
7077 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
7078 asection
*sec
, int *index_return
)
7080 if (sec
== &_bfd_elf_large_com_section
)
7082 *index_return
= SHN_X86_64_LCOMMON
;
7088 /* Process a symbol. */
7091 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
7094 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
7096 switch (elfsym
->internal_elf_sym
.st_shndx
)
7098 case SHN_X86_64_LCOMMON
:
7099 asym
->section
= &_bfd_elf_large_com_section
;
7100 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
7101 /* Common symbol doesn't set BSF_GLOBAL. */
7102 asym
->flags
&= ~BSF_GLOBAL
;
7108 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
7110 return (sym
->st_shndx
== SHN_COMMON
7111 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
7115 elf_x86_64_common_section_index (asection
*sec
)
7117 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
7120 return SHN_X86_64_LCOMMON
;
7124 elf_x86_64_common_section (asection
*sec
)
7126 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
7127 return bfd_com_section_ptr
;
7129 return &_bfd_elf_large_com_section
;
7133 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
7134 const Elf_Internal_Sym
*sym
,
7139 const asection
*oldsec
)
7141 /* A normal common symbol and a large common symbol result in a
7142 normal common symbol. We turn the large common symbol into a
7145 && h
->root
.type
== bfd_link_hash_common
7147 && bfd_is_com_section (*psec
)
7150 if (sym
->st_shndx
== SHN_COMMON
7151 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
7153 h
->root
.u
.c
.p
->section
7154 = bfd_make_section_old_way (oldbfd
, "COMMON");
7155 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
7157 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
7158 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
7159 *psec
= bfd_com_section_ptr
;
7166 elf_x86_64_additional_program_headers (bfd
*abfd
,
7167 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
7172 /* Check to see if we need a large readonly segment. */
7173 s
= bfd_get_section_by_name (abfd
, ".lrodata");
7174 if (s
&& (s
->flags
& SEC_LOAD
))
7177 /* Check to see if we need a large data segment. Since .lbss sections
7178 is placed right after the .bss section, there should be no need for
7179 a large data segment just because of .lbss. */
7180 s
= bfd_get_section_by_name (abfd
, ".ldata");
7181 if (s
&& (s
->flags
& SEC_LOAD
))
7187 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7190 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
7192 if (h
->plt
.offset
!= (bfd_vma
) -1
7194 && !h
->pointer_equality_needed
)
7197 return _bfd_elf_hash_symbol (h
);
7200 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
7203 elf_x86_64_relocs_compatible (const bfd_target
*input
,
7204 const bfd_target
*output
)
7206 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
7207 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
7208 && _bfd_elf_relocs_compatible (input
, output
));
7211 /* Parse x86-64 GNU properties. */
7213 static enum elf_property_kind
7214 elf_x86_64_parse_gnu_properties (bfd
*abfd
, unsigned int type
,
7215 bfd_byte
*ptr
, unsigned int datasz
)
7221 case GNU_PROPERTY_X86_ISA_1_USED
:
7222 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
7223 case GNU_PROPERTY_X86_FEATURE_1_AND
:
7227 ((type
== GNU_PROPERTY_X86_ISA_1_USED
7228 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
7229 : (type
== GNU_PROPERTY_X86_ISA_1_NEEDED
7230 ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>")
7231 : _("error: %B: <corrupt x86 feature size: 0x%x>"))),
7233 return property_corrupt
;
7235 prop
= _bfd_elf_get_property (abfd
, type
, datasz
);
7236 /* Combine properties of the same type. */
7237 prop
->u
.number
|= bfd_h_get_32 (abfd
, ptr
);
7238 prop
->pr_kind
= property_number
;
7242 return property_ignored
;
7245 return property_number
;
7248 /* Merge x86-64 GNU property BPROP with APROP. If APROP isn't NULL,
7249 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
7250 should be merged with ABFD. */
7253 elf_x86_64_merge_gnu_properties (struct bfd_link_info
*info
,
7254 bfd
*abfd ATTRIBUTE_UNUSED
,
7255 elf_property
*aprop
,
7256 elf_property
*bprop
)
7258 unsigned int number
, features
;
7259 bfd_boolean updated
= FALSE
;
7260 unsigned int pr_type
= aprop
!= NULL
? aprop
->pr_type
: bprop
->pr_type
;
7264 case GNU_PROPERTY_X86_ISA_1_USED
:
7265 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
7266 if (aprop
!= NULL
&& bprop
!= NULL
)
7268 number
= aprop
->u
.number
;
7269 aprop
->u
.number
= number
| bprop
->u
.number
;
7270 updated
= number
!= (unsigned int) aprop
->u
.number
;
7274 /* Return TRUE if APROP is NULL to indicate that BPROP should
7275 be added to ABFD. */
7276 updated
= aprop
== NULL
;
7280 case GNU_PROPERTY_X86_FEATURE_1_AND
:
7281 /* Only one of APROP and BPROP can be NULL:
7282 1. APROP & BPROP when both APROP and BPROP aren't NULL.
7283 2. If APROP is NULL, remove x86 feature.
7284 3. Otherwise, do nothing.
7286 if (aprop
!= NULL
&& bprop
!= NULL
)
7290 features
= GNU_PROPERTY_X86_FEATURE_1_IBT
;
7292 features
|= GNU_PROPERTY_X86_FEATURE_1_SHSTK
;
7293 number
= aprop
->u
.number
;
7294 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
7295 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7296 aprop
->u
.number
= (number
& bprop
->u
.number
) | features
;
7297 updated
= number
!= (unsigned int) aprop
->u
.number
;
7298 /* Remove the property if all feature bits are cleared. */
7299 if (aprop
->u
.number
== 0)
7300 aprop
->pr_kind
= property_remove
;
7306 features
= GNU_PROPERTY_X86_FEATURE_1_IBT
;
7308 features
|= GNU_PROPERTY_X86_FEATURE_1_SHSTK
;
7311 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
7312 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7315 number
= aprop
->u
.number
;
7316 aprop
->u
.number
= number
| features
;
7317 updated
= number
!= (unsigned int) aprop
->u
.number
;
7321 bprop
->u
.number
|= features
;
7325 else if (aprop
!= NULL
)
7327 aprop
->pr_kind
= property_remove
;
7334 /* Never should happen. */
7341 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
7342 with GNU properties if found. Otherwise, return NULL. */
7345 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info
*info
)
7347 bfd_boolean normal_target
;
7348 bfd_boolean lazy_plt
;
7349 asection
*sec
, *pltsec
;
7351 bfd_boolean use_ibt_plt
;
7352 unsigned int plt_alignment
, features
;
7353 struct elf_x86_64_link_hash_table
*htab
;
7358 features
= GNU_PROPERTY_X86_FEATURE_1_IBT
;
7360 features
|= GNU_PROPERTY_X86_FEATURE_1_SHSTK
;
7363 /* Turn on GNU_PROPERTY_X86_FEATURE_1_IBT and
7364 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7368 for (pbfd
= info
->input_bfds
;
7370 pbfd
= pbfd
->link
.next
)
7371 if (bfd_get_flavour (pbfd
) == bfd_target_elf_flavour
7372 && bfd_count_sections (pbfd
) != 0)
7376 if (elf_properties (pbfd
) != NULL
)
7378 /* Find a normal input file with GNU property note. */
7379 prop
= _bfd_elf_get_property (pbfd
,
7380 GNU_PROPERTY_X86_FEATURE_1_AND
,
7382 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
7383 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7384 prop
->u
.number
|= features
;
7385 prop
->pr_kind
= property_number
;
7390 if (pbfd
== NULL
&& ebfd
!= NULL
)
7392 /* Create GNU_PROPERTY_X86_FEATURE_1_IBT if needed. */
7393 prop
= _bfd_elf_get_property (ebfd
,
7394 GNU_PROPERTY_X86_FEATURE_1_AND
,
7396 prop
->u
.number
= features
;
7397 prop
->pr_kind
= property_number
;
7399 sec
= bfd_make_section_with_flags (ebfd
,
7400 NOTE_GNU_PROPERTY_SECTION_NAME
,
7408 info
->callbacks
->einfo (_("%F: failed to create GNU property section\n"));
7410 if (!bfd_set_section_alignment (ebfd
, sec
,
7411 ABI_64_P (ebfd
) ? 3 : 2))
7414 info
->callbacks
->einfo (_("%F%A: failed to align section\n"),
7418 elf_section_type (sec
) = SHT_NOTE
;
7422 pbfd
= _bfd_elf_link_setup_gnu_properties (info
);
7424 if (bfd_link_relocatable (info
))
7427 htab
= elf_x86_64_hash_table (info
);
7431 use_ibt_plt
= info
->ibtplt
|| info
->ibt
;
7432 if (!use_ibt_plt
&& pbfd
!= NULL
)
7434 /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */
7435 elf_property_list
*p
;
7437 /* The property list is sorted in order of type. */
7438 for (p
= elf_properties (pbfd
); p
; p
= p
->next
)
7440 if (GNU_PROPERTY_X86_FEATURE_1_AND
== p
->property
.pr_type
)
7442 use_ibt_plt
= !!(p
->property
.u
.number
7443 & GNU_PROPERTY_X86_FEATURE_1_IBT
);
7446 else if (GNU_PROPERTY_X86_FEATURE_1_AND
< p
->property
.pr_type
)
7451 dynobj
= htab
->elf
.dynobj
;
7453 /* Set htab->elf.dynobj here so that there is no need to check and
7454 set it in check_relocs. */
7459 htab
->elf
.dynobj
= pbfd
;
7466 /* Find a normal input file to hold linker created
7468 for (abfd
= info
->input_bfds
;
7470 abfd
= abfd
->link
.next
)
7472 & (DYNAMIC
| BFD_LINKER_CREATED
| BFD_PLUGIN
)) == 0)
7474 htab
->elf
.dynobj
= abfd
;
7481 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
7482 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
7483 canonical function address. */
7484 htab
->plt
.has_plt0
= 1;
7486 if (get_elf_x86_64_backend_data (info
->output_bfd
)->os
7491 if (ABI_64_P (dynobj
))
7493 htab
->lazy_plt
= &elf_x86_64_lazy_ibt_plt
;
7494 htab
->non_lazy_plt
= &elf_x86_64_non_lazy_ibt_plt
;
7498 htab
->lazy_plt
= &elf_x32_lazy_ibt_plt
;
7499 htab
->non_lazy_plt
= &elf_x32_non_lazy_ibt_plt
;
7502 else if (info
->bndplt
)
7504 htab
->lazy_plt
= &elf_x86_64_lazy_bnd_plt
;
7505 htab
->non_lazy_plt
= &elf_x86_64_non_lazy_bnd_plt
;
7509 htab
->lazy_plt
= &elf_x86_64_lazy_plt
;
7510 htab
->non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
7512 normal_target
= TRUE
;
7516 htab
->lazy_plt
= &elf_x86_64_nacl_plt
;
7517 htab
->non_lazy_plt
= NULL
;
7518 normal_target
= FALSE
;
7521 pltsec
= htab
->elf
.splt
;
7523 /* If the non-lazy PLT is available, use it for all PLT entries if
7524 there are no PLT0 or no .plt section. */
7525 if (htab
->non_lazy_plt
!= NULL
7526 && (!htab
->plt
.has_plt0
|| pltsec
== NULL
))
7530 = htab
->non_lazy_plt
->plt_entry
;
7531 htab
->plt
.plt_entry_size
7532 = htab
->non_lazy_plt
->plt_entry_size
;
7533 htab
->plt
.plt_got_offset
7534 = htab
->non_lazy_plt
->plt_got_offset
;
7535 htab
->plt
.plt_got_insn_size
7536 = htab
->non_lazy_plt
->plt_got_insn_size
;
7537 htab
->plt
.eh_frame_plt_size
7538 = htab
->non_lazy_plt
->eh_frame_plt_size
;
7539 htab
->plt
.eh_frame_plt
7540 = htab
->non_lazy_plt
->eh_frame_plt
;
7546 = htab
->lazy_plt
->plt_entry
;
7547 htab
->plt
.plt_entry_size
7548 = htab
->lazy_plt
->plt_entry_size
;
7549 htab
->plt
.plt_got_offset
7550 = htab
->lazy_plt
->plt_got_offset
;
7551 htab
->plt
.plt_got_insn_size
7552 = htab
->lazy_plt
->plt_got_insn_size
;
7553 htab
->plt
.eh_frame_plt_size
7554 = htab
->lazy_plt
->eh_frame_plt_size
;
7555 htab
->plt
.eh_frame_plt
7556 = htab
->lazy_plt
->eh_frame_plt
;
7559 /* Return if there are no normal input files. */
7563 /* Since create_dynamic_sections isn't always called, but GOT
7564 relocations need GOT relocations, create them here so that we
7565 don't need to do it in check_relocs. */
7566 if (htab
->elf
.sgot
== NULL
7567 && !_bfd_elf_create_got_section (dynobj
, info
))
7568 info
->callbacks
->einfo (_("%F: failed to create GOT sections\n"));
7570 /* Align .got and .got.plt sections to their entry size. Do it here
7571 instead of in create_dynamic_sections so that they are always
7572 properly aligned even if create_dynamic_sections isn't called. */
7573 sec
= htab
->elf
.sgot
;
7574 if (!bfd_set_section_alignment (dynobj
, sec
, 3))
7575 goto error_alignment
;
7577 sec
= htab
->elf
.sgotplt
;
7578 if (!bfd_set_section_alignment (dynobj
, sec
, 3))
7579 goto error_alignment
;
7581 /* Create the ifunc sections here so that check_relocs can be
7583 if (!_bfd_elf_create_ifunc_sections (dynobj
, info
))
7584 info
->callbacks
->einfo (_("%F: failed to create ifunc sections\n"));
7586 plt_alignment
= bfd_log2 (htab
->plt
.plt_entry_size
);
7590 /* Whe creating executable, set the contents of the .interp
7591 section to the interpreter. */
7592 if (bfd_link_executable (info
) && !info
->nointerp
)
7594 asection
*s
= bfd_get_linker_section (dynobj
, ".interp");
7597 s
->size
= htab
->dynamic_interpreter_size
;
7598 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
7602 /* Don't change PLT section alignment for NaCl since it uses
7603 64-byte PLT entry and sets PLT section alignment to 32
7604 bytes. Don't create additional PLT sections for NaCl. */
7607 const struct elf_backend_data
*bed
7608 = get_elf_backend_data (dynobj
);
7609 flagword pltflags
= (bed
->dynamic_sec_flags
7614 unsigned int non_lazy_plt_alignment
7615 = bfd_log2 (htab
->non_lazy_plt
->plt_entry_size
);
7618 if (!bfd_set_section_alignment (sec
->owner
, sec
,
7620 goto error_alignment
;
7622 /* Create the GOT procedure linkage table. */
7623 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7627 info
->callbacks
->einfo (_("%F: failed to create GOT PLT section\n"));
7629 if (!bfd_set_section_alignment (dynobj
, sec
,
7630 non_lazy_plt_alignment
))
7631 goto error_alignment
;
7633 htab
->plt_got
= sec
;
7641 /* Create the second PLT for Intel IBT support. IBT
7642 PLT is supported only for non-NaCl target and is
7643 is needed only for lazy binding. */
7644 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7648 info
->callbacks
->einfo (_("%F: failed to create IBT-enabled PLT section\n"));
7650 if (!bfd_set_section_alignment (dynobj
, sec
,
7652 goto error_alignment
;
7654 else if (info
->bndplt
&& ABI_64_P (dynobj
))
7656 /* Create the second PLT for Intel MPX support. MPX
7657 PLT is supported only for non-NaCl target in 64-bit
7658 mode and is needed only for lazy binding. */
7659 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7663 info
->callbacks
->einfo (_("%F: failed to create BND PLT section\n"));
7665 if (!bfd_set_section_alignment (dynobj
, sec
,
7666 non_lazy_plt_alignment
))
7667 goto error_alignment
;
7670 htab
->plt_second
= sec
;
7674 if (!info
->no_ld_generated_unwind_info
)
7676 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
7677 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
7678 | SEC_LINKER_CREATED
);
7680 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7684 info
->callbacks
->einfo (_("%F: failed to create PLT .eh_frame section\n"));
7686 if (!bfd_set_section_alignment (dynobj
, sec
,
7687 ABI_64_P (dynobj
) ? 3 : 2))
7688 goto error_alignment
;
7690 htab
->plt_eh_frame
= sec
;
7692 if (htab
->plt_got
!= NULL
)
7694 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7698 info
->callbacks
->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
7700 if (!bfd_set_section_alignment (dynobj
, sec
,
7701 ABI_64_P (dynobj
) ? 3 : 2))
7702 goto error_alignment
;
7704 htab
->plt_got_eh_frame
= sec
;
7707 if (htab
->plt_second
!= NULL
)
7709 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7713 info
->callbacks
->einfo (_("%F: failed to create BND PLT .eh_frame section\n"));
7715 if (!bfd_set_section_alignment (dynobj
, sec
, 3))
7716 goto error_alignment
;
7718 htab
->plt_second_eh_frame
= sec
;
7725 /* The .iplt section is used for IFUNC symbols in static
7727 sec
= htab
->elf
.iplt
;
7729 && !bfd_set_section_alignment (sec
->owner
, sec
,
7731 goto error_alignment
;
7737 static const struct bfd_elf_special_section
7738 elf_x86_64_special_sections
[]=
7740 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
7741 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
7742 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
7743 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
7744 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
7745 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
7746 { NULL
, 0, 0, 0, 0 }
7749 #define TARGET_LITTLE_SYM x86_64_elf64_vec
7750 #define TARGET_LITTLE_NAME "elf64-x86-64"
7751 #define ELF_ARCH bfd_arch_i386
7752 #define ELF_TARGET_ID X86_64_ELF_DATA
7753 #define ELF_MACHINE_CODE EM_X86_64
7754 #define ELF_MAXPAGESIZE 0x200000
7755 #define ELF_MINPAGESIZE 0x1000
7756 #define ELF_COMMONPAGESIZE 0x1000
7758 #define elf_backend_can_gc_sections 1
7759 #define elf_backend_can_refcount 1
7760 #define elf_backend_want_got_plt 1
7761 #define elf_backend_plt_readonly 1
7762 #define elf_backend_want_plt_sym 0
7763 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
7764 #define elf_backend_rela_normal 1
7765 #define elf_backend_plt_alignment 4
7766 #define elf_backend_extern_protected_data 1
7767 #define elf_backend_caches_rawsize 1
7768 #define elf_backend_dtrel_excludes_plt 1
7769 #define elf_backend_want_dynrelro 1
7771 #define elf_info_to_howto elf_x86_64_info_to_howto
7773 #define bfd_elf64_bfd_link_hash_table_create \
7774 elf_x86_64_link_hash_table_create
7775 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
7776 #define bfd_elf64_bfd_reloc_name_lookup \
7777 elf_x86_64_reloc_name_lookup
7779 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
7780 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
7781 #define elf_backend_check_relocs elf_x86_64_check_relocs
7782 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
7783 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
7784 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
7785 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
7786 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
7787 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
7788 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
7789 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
7791 #define elf_backend_write_core_note elf_x86_64_write_core_note
7793 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
7794 #define elf_backend_relocate_section elf_x86_64_relocate_section
7795 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
7796 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
7797 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7798 #define elf_backend_object_p elf64_x86_64_elf_object_p
7799 #define bfd_elf64_mkobject elf_x86_64_mkobject
7800 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
7802 #define elf_backend_section_from_shdr \
7803 elf_x86_64_section_from_shdr
7805 #define elf_backend_section_from_bfd_section \
7806 elf_x86_64_elf_section_from_bfd_section
7807 #define elf_backend_add_symbol_hook \
7808 elf_x86_64_add_symbol_hook
7809 #define elf_backend_symbol_processing \
7810 elf_x86_64_symbol_processing
7811 #define elf_backend_common_section_index \
7812 elf_x86_64_common_section_index
7813 #define elf_backend_common_section \
7814 elf_x86_64_common_section
7815 #define elf_backend_common_definition \
7816 elf_x86_64_common_definition
7817 #define elf_backend_merge_symbol \
7818 elf_x86_64_merge_symbol
7819 #define elf_backend_special_sections \
7820 elf_x86_64_special_sections
7821 #define elf_backend_additional_program_headers \
7822 elf_x86_64_additional_program_headers
7823 #define elf_backend_hash_symbol \
7824 elf_x86_64_hash_symbol
7825 #define elf_backend_omit_section_dynsym \
7826 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
7827 #define elf_backend_fixup_symbol \
7828 elf_x86_64_fixup_symbol
7829 #define elf_backend_parse_gnu_properties \
7830 elf_x86_64_parse_gnu_properties
7831 #define elf_backend_merge_gnu_properties \
7832 elf_x86_64_merge_gnu_properties
7833 #define elf_backend_setup_gnu_properties \
7834 elf_x86_64_link_setup_gnu_properties
7836 #include "elf64-target.h"
7838 /* CloudABI support. */
7840 #undef TARGET_LITTLE_SYM
7841 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
7842 #undef TARGET_LITTLE_NAME
7843 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
7846 #define ELF_OSABI ELFOSABI_CLOUDABI
7849 #define elf64_bed elf64_x86_64_cloudabi_bed
7851 #include "elf64-target.h"
7853 /* FreeBSD support. */
7855 #undef TARGET_LITTLE_SYM
7856 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
7857 #undef TARGET_LITTLE_NAME
7858 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
7861 #define ELF_OSABI ELFOSABI_FREEBSD
7864 #define elf64_bed elf64_x86_64_fbsd_bed
7866 #include "elf64-target.h"
7868 /* Solaris 2 support. */
7870 #undef TARGET_LITTLE_SYM
7871 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
7872 #undef TARGET_LITTLE_NAME
7873 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
7875 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
7876 objects won't be recognized. */
7880 #define elf64_bed elf64_x86_64_sol2_bed
7882 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
7884 #undef elf_backend_static_tls_alignment
7885 #define elf_backend_static_tls_alignment 16
7887 /* The Solaris 2 ABI requires a plt symbol on all platforms.
7889 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
7891 #undef elf_backend_want_plt_sym
7892 #define elf_backend_want_plt_sym 1
7894 #undef elf_backend_strtab_flags
7895 #define elf_backend_strtab_flags SHF_STRINGS
7898 elf64_x86_64_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
7899 bfd
*obfd ATTRIBUTE_UNUSED
,
7900 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
7901 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
7903 /* PR 19938: FIXME: Need to add code for setting the sh_info
7904 and sh_link fields of Solaris specific section types. */
7908 #undef elf_backend_copy_special_section_fields
7909 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
7911 #include "elf64-target.h"
7913 /* Native Client support. */
7916 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
7918 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
7919 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
7923 #undef TARGET_LITTLE_SYM
7924 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
7925 #undef TARGET_LITTLE_NAME
7926 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
7928 #define elf64_bed elf64_x86_64_nacl_bed
7930 #undef ELF_MAXPAGESIZE
7931 #undef ELF_MINPAGESIZE
7932 #undef ELF_COMMONPAGESIZE
7933 #define ELF_MAXPAGESIZE 0x10000
7934 #define ELF_MINPAGESIZE 0x10000
7935 #define ELF_COMMONPAGESIZE 0x10000
7937 /* Restore defaults. */
7939 #undef elf_backend_static_tls_alignment
7940 #undef elf_backend_want_plt_sym
7941 #define elf_backend_want_plt_sym 0
7942 #undef elf_backend_strtab_flags
7943 #undef elf_backend_copy_special_section_fields
7945 /* NaCl uses substantially different PLT entries for the same effects. */
7947 #undef elf_backend_plt_alignment
7948 #define elf_backend_plt_alignment 5
7949 #define NACL_PLT_ENTRY_SIZE 64
7950 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
7952 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
7954 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
7955 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
7956 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
7957 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
7958 0x41, 0xff, 0xe3, /* jmpq *%r11 */
7960 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
7961 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
7963 /* 32 bytes of nop to pad out to the standard size. */
7964 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7965 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7966 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7967 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7968 0x66, /* excess data16 prefix */
7972 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
7974 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
7975 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
7976 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
7977 0x41, 0xff, 0xe3, /* jmpq *%r11 */
7979 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
7980 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7981 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7983 /* Lazy GOT entries point here (32-byte aligned). */
7984 0x68, /* pushq immediate */
7985 0, 0, 0, 0, /* replaced with index into relocation table. */
7986 0xe9, /* jmp relative */
7987 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
7989 /* 22 bytes of nop to pad out to the standard size. */
7990 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7991 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7992 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
7995 /* .eh_frame covering the .plt section. */
7997 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
7999 #if (PLT_CIE_LENGTH != 20 \
8000 || PLT_FDE_LENGTH != 36 \
8001 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
8002 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
8003 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
8005 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
8006 0, 0, 0, 0, /* CIE ID */
8007 1, /* CIE version */
8008 'z', 'R', 0, /* Augmentation string */
8009 1, /* Code alignment factor */
8010 0x78, /* Data alignment factor */
8011 16, /* Return address column */
8012 1, /* Augmentation size */
8013 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
8014 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
8015 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
8016 DW_CFA_nop
, DW_CFA_nop
,
8018 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
8019 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
8020 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
8021 0, 0, 0, 0, /* .plt size goes here */
8022 0, /* Augmentation size */
8023 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
8024 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
8025 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
8026 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
8027 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
8028 13, /* Block length */
8029 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
8030 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
8031 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
8032 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
8033 DW_CFA_nop
, DW_CFA_nop
8036 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt
=
8038 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
8039 elf_x86_64_nacl_plt_entry
, /* plt_entry */
8040 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
8041 2, /* plt0_got1_offset */
8042 9, /* plt0_got2_offset */
8043 13, /* plt0_got2_insn_end */
8044 3, /* plt_got_offset */
8045 33, /* plt_reloc_offset */
8046 38, /* plt_plt_offset */
8047 7, /* plt_got_insn_size */
8048 42, /* plt_plt_insn_end */
8049 32, /* plt_lazy_offset */
8050 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
8051 sizeof (elf_x86_64_nacl_eh_frame_plt
) /* eh_frame_plt_size */
8054 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
8059 #undef elf_backend_arch_data
8060 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
8062 #undef elf_backend_object_p
8063 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
8064 #undef elf_backend_modify_segment_map
8065 #define elf_backend_modify_segment_map nacl_modify_segment_map
8066 #undef elf_backend_modify_program_headers
8067 #define elf_backend_modify_program_headers nacl_modify_program_headers
8068 #undef elf_backend_final_write_processing
8069 #define elf_backend_final_write_processing nacl_final_write_processing
8071 #include "elf64-target.h"
8073 /* Native Client x32 support. */
8076 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
8078 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
8079 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
8083 #undef TARGET_LITTLE_SYM
8084 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
8085 #undef TARGET_LITTLE_NAME
8086 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
8088 #define elf32_bed elf32_x86_64_nacl_bed
8090 #define bfd_elf32_bfd_link_hash_table_create \
8091 elf_x86_64_link_hash_table_create
8092 #define bfd_elf32_bfd_reloc_type_lookup \
8093 elf_x86_64_reloc_type_lookup
8094 #define bfd_elf32_bfd_reloc_name_lookup \
8095 elf_x86_64_reloc_name_lookup
8096 #define bfd_elf32_mkobject \
8098 #define bfd_elf32_get_synthetic_symtab \
8099 elf_x86_64_get_synthetic_symtab
8101 #undef elf_backend_object_p
8102 #define elf_backend_object_p \
8103 elf32_x86_64_nacl_elf_object_p
8105 #undef elf_backend_bfd_from_remote_memory
8106 #define elf_backend_bfd_from_remote_memory \
8107 _bfd_elf32_bfd_from_remote_memory
8109 #undef elf_backend_size_info
8110 #define elf_backend_size_info \
8111 _bfd_elf32_size_info
8113 #include "elf32-target.h"
8115 /* Restore defaults. */
8116 #undef elf_backend_object_p
8117 #define elf_backend_object_p elf64_x86_64_elf_object_p
8118 #undef elf_backend_bfd_from_remote_memory
8119 #undef elf_backend_size_info
8120 #undef elf_backend_modify_segment_map
8121 #undef elf_backend_modify_program_headers
8122 #undef elf_backend_final_write_processing
8124 /* Intel L1OM support. */
8127 elf64_l1om_elf_object_p (bfd
*abfd
)
8129 /* Set the right machine number for an L1OM elf64 file. */
8130 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
8134 #undef TARGET_LITTLE_SYM
8135 #define TARGET_LITTLE_SYM l1om_elf64_vec
8136 #undef TARGET_LITTLE_NAME
8137 #define TARGET_LITTLE_NAME "elf64-l1om"
8139 #define ELF_ARCH bfd_arch_l1om
8141 #undef ELF_MACHINE_CODE
8142 #define ELF_MACHINE_CODE EM_L1OM
8147 #define elf64_bed elf64_l1om_bed
8149 #undef elf_backend_object_p
8150 #define elf_backend_object_p elf64_l1om_elf_object_p
8152 /* Restore defaults. */
8153 #undef ELF_MAXPAGESIZE
8154 #undef ELF_MINPAGESIZE
8155 #undef ELF_COMMONPAGESIZE
8156 #define ELF_MAXPAGESIZE 0x200000
8157 #define ELF_MINPAGESIZE 0x1000
8158 #define ELF_COMMONPAGESIZE 0x1000
8159 #undef elf_backend_plt_alignment
8160 #define elf_backend_plt_alignment 4
8161 #undef elf_backend_arch_data
8162 #define elf_backend_arch_data &elf_x86_64_arch_bed
8164 #include "elf64-target.h"
8166 /* FreeBSD L1OM support. */
8168 #undef TARGET_LITTLE_SYM
8169 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
8170 #undef TARGET_LITTLE_NAME
8171 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
8174 #define ELF_OSABI ELFOSABI_FREEBSD
8177 #define elf64_bed elf64_l1om_fbsd_bed
8179 #include "elf64-target.h"
8181 /* Intel K1OM support. */
8184 elf64_k1om_elf_object_p (bfd
*abfd
)
8186 /* Set the right machine number for an K1OM elf64 file. */
8187 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
8191 #undef TARGET_LITTLE_SYM
8192 #define TARGET_LITTLE_SYM k1om_elf64_vec
8193 #undef TARGET_LITTLE_NAME
8194 #define TARGET_LITTLE_NAME "elf64-k1om"
8196 #define ELF_ARCH bfd_arch_k1om
8198 #undef ELF_MACHINE_CODE
8199 #define ELF_MACHINE_CODE EM_K1OM
8204 #define elf64_bed elf64_k1om_bed
8206 #undef elf_backend_object_p
8207 #define elf_backend_object_p elf64_k1om_elf_object_p
8209 #undef elf_backend_static_tls_alignment
8211 #undef elf_backend_want_plt_sym
8212 #define elf_backend_want_plt_sym 0
8214 #include "elf64-target.h"
8216 /* FreeBSD K1OM support. */
8218 #undef TARGET_LITTLE_SYM
8219 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
8220 #undef TARGET_LITTLE_NAME
8221 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
8224 #define ELF_OSABI ELFOSABI_FREEBSD
8227 #define elf64_bed elf64_k1om_fbsd_bed
8229 #include "elf64-target.h"
8231 /* 32bit x86-64 support. */
8233 #undef TARGET_LITTLE_SYM
8234 #define TARGET_LITTLE_SYM x86_64_elf32_vec
8235 #undef TARGET_LITTLE_NAME
8236 #define TARGET_LITTLE_NAME "elf32-x86-64"
8240 #define ELF_ARCH bfd_arch_i386
8242 #undef ELF_MACHINE_CODE
8243 #define ELF_MACHINE_CODE EM_X86_64
8247 #undef elf_backend_object_p
8248 #define elf_backend_object_p \
8249 elf32_x86_64_elf_object_p
8251 #undef elf_backend_bfd_from_remote_memory
8252 #define elf_backend_bfd_from_remote_memory \
8253 _bfd_elf32_bfd_from_remote_memory
8255 #undef elf_backend_size_info
8256 #define elf_backend_size_info \
8257 _bfd_elf32_size_info
8259 #include "elf32-target.h"