1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2018 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. */
22 #include "elfxx-x86.h"
25 #include "libiberty.h"
27 #include "opcode/i386.h"
28 #include "elf/x86-64.h"
35 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
36 #define MINUS_ONE (~ (bfd_vma) 0)
38 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
39 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
40 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
41 since they are the same. */
43 /* The relocation "howto" table. Order of fields:
44 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
45 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
46 static reloc_howto_type x86_64_elf_howto_table
[] =
48 HOWTO(R_X86_64_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
49 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
51 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
52 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
54 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
55 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
57 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
58 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
60 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
61 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
63 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
64 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
66 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
67 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
69 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
70 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
72 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
73 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
75 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
76 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
78 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
79 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
81 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
82 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
84 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
85 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
86 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
87 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
88 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
90 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
91 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
92 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
93 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
95 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
98 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
99 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
101 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
102 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
104 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
105 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
107 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
108 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
110 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
111 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
113 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
114 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
116 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
117 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
119 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
121 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
122 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
123 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
124 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
125 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
126 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
128 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
129 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
131 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
132 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
133 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
134 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
135 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
137 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
138 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
140 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
141 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", FALSE
, 0xffffffff, 0xffffffff,
143 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, FALSE
, 0, complain_overflow_unsigned
,
144 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", FALSE
, MINUS_ONE
, MINUS_ONE
,
146 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
147 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
148 "R_X86_64_GOTPC32_TLSDESC",
149 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
150 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
151 complain_overflow_dont
, bfd_elf_generic_reloc
,
152 "R_X86_64_TLSDESC_CALL",
154 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
155 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
157 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
158 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
159 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
161 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
162 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
164 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
165 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", FALSE
, 0xffffffff, 0xffffffff,
167 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
168 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", FALSE
, 0xffffffff, 0xffffffff,
170 HOWTO(R_X86_64_GOTPCRELX
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
171 bfd_elf_generic_reloc
, "R_X86_64_GOTPCRELX", FALSE
, 0xffffffff,
173 HOWTO(R_X86_64_REX_GOTPCRELX
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
174 bfd_elf_generic_reloc
, "R_X86_64_REX_GOTPCRELX", FALSE
, 0xffffffff,
177 /* We have a gap in the reloc numbers here.
178 R_X86_64_standard counts the number up to this point, and
179 R_X86_64_vt_offset is the value to subtract from a reloc type of
180 R_X86_64_GNU_VT* to form an index into this table. */
181 #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
182 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
184 /* GNU extension to record C++ vtable hierarchy. */
185 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
186 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
188 /* GNU extension to record C++ vtable member usage. */
189 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
190 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
193 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
194 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
195 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
199 /* Set if a relocation is converted from a GOTPCREL relocation. */
200 #define R_X86_64_converted_reloc_bit (1 << 7)
202 #define X86_PCREL_TYPE_P(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
206 || ((TYPE) == R_X86_64_PC32_BND) \
207 || ((TYPE) == R_X86_64_PC64))
209 #define X86_SIZE_TYPE_P(TYPE) \
210 ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64)
212 /* Map BFD relocs to the x86_64 elf relocs. */
215 bfd_reloc_code_real_type bfd_reloc_val
;
216 unsigned char elf_reloc_val
;
219 static const struct elf_reloc_map x86_64_reloc_map
[] =
221 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
222 { BFD_RELOC_64
, R_X86_64_64
, },
223 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
224 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
225 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
226 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
227 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
228 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
229 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
230 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
231 { BFD_RELOC_32
, R_X86_64_32
, },
232 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
233 { BFD_RELOC_16
, R_X86_64_16
, },
234 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
235 { BFD_RELOC_8
, R_X86_64_8
, },
236 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
237 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
238 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
239 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
240 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
241 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
242 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
243 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
244 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
245 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
246 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
247 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
248 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
249 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
250 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
251 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
252 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
253 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
254 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
255 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
256 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
257 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
258 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
259 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
, },
260 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
, },
261 { BFD_RELOC_X86_64_GOTPCRELX
, R_X86_64_GOTPCRELX
, },
262 { BFD_RELOC_X86_64_REX_GOTPCRELX
, R_X86_64_REX_GOTPCRELX
, },
263 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
264 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
267 static reloc_howto_type
*
268 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
272 if (r_type
== (unsigned int) R_X86_64_32
)
277 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
279 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
280 || r_type
>= (unsigned int) R_X86_64_max
)
282 if (r_type
>= (unsigned int) R_X86_64_standard
)
284 /* xgettext:c-format */
285 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
287 bfd_set_error (bfd_error_bad_value
);
293 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
294 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
295 return &x86_64_elf_howto_table
[i
];
298 /* Given a BFD reloc type, return a HOWTO structure. */
299 static reloc_howto_type
*
300 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
301 bfd_reloc_code_real_type code
)
305 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
308 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
309 return elf_x86_64_rtype_to_howto (abfd
,
310 x86_64_reloc_map
[i
].elf_reloc_val
);
315 static reloc_howto_type
*
316 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
321 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
323 /* Get x32 R_X86_64_32. */
324 reloc_howto_type
*reloc
325 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
326 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
330 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
331 if (x86_64_elf_howto_table
[i
].name
!= NULL
332 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
333 return &x86_64_elf_howto_table
[i
];
338 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
341 elf_x86_64_info_to_howto (bfd
*abfd
, arelent
*cache_ptr
,
342 Elf_Internal_Rela
*dst
)
346 r_type
= ELF32_R_TYPE (dst
->r_info
);
347 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
348 if (cache_ptr
->howto
== NULL
)
350 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
|| cache_ptr
->howto
->type
== R_X86_64_NONE
);
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';
442 # if GCC_VERSION >= 8000
443 # pragma GCC diagnostic push
444 # pragma GCC diagnostic ignored "-Wstringop-truncation"
447 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
450 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
452 const char *fname
, *psargs
;
463 va_start (ap
, note_type
);
464 fname
= va_arg (ap
, const char *);
465 psargs
= va_arg (ap
, const char *);
468 if (bed
->s
->elfclass
== ELFCLASS32
)
471 memset (&data
, 0, sizeof (data
));
472 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
473 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
474 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
475 &data
, sizeof (data
));
480 memset (&data
, 0, sizeof (data
));
481 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
482 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
483 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
484 &data
, sizeof (data
));
489 va_start (ap
, note_type
);
490 pid
= va_arg (ap
, long);
491 cursig
= va_arg (ap
, int);
492 gregs
= va_arg (ap
, const void *);
495 if (bed
->s
->elfclass
== ELFCLASS32
)
497 if (bed
->elf_machine_code
== EM_X86_64
)
499 prstatusx32_t prstat
;
500 memset (&prstat
, 0, sizeof (prstat
));
502 prstat
.pr_cursig
= cursig
;
503 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
504 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
505 &prstat
, sizeof (prstat
));
510 memset (&prstat
, 0, sizeof (prstat
));
512 prstat
.pr_cursig
= cursig
;
513 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
514 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
515 &prstat
, sizeof (prstat
));
521 memset (&prstat
, 0, sizeof (prstat
));
523 prstat
.pr_cursig
= cursig
;
524 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
525 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
526 &prstat
, sizeof (prstat
));
531 # if GCC_VERSION >= 8000
532 # pragma GCC diagnostic pop
536 /* Functions for the x86-64 ELF linker. */
538 /* The size in bytes of an entry in the global offset table. */
540 #define GOT_ENTRY_SIZE 8
542 /* The size in bytes of an entry in the lazy procedure linkage table. */
544 #define LAZY_PLT_ENTRY_SIZE 16
546 /* The size in bytes of an entry in the non-lazy procedure linkage
549 #define NON_LAZY_PLT_ENTRY_SIZE 8
551 /* The first entry in a lazy procedure linkage table looks like this.
552 See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this
555 static const bfd_byte elf_x86_64_lazy_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
557 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
558 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
559 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
562 /* Subsequent entries in a lazy procedure linkage table look like this. */
564 static const bfd_byte elf_x86_64_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
566 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
567 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
568 0x68, /* pushq immediate */
569 0, 0, 0, 0, /* replaced with index into relocation table. */
570 0xe9, /* jmp relative */
571 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
574 /* The first entry in a lazy procedure linkage table with BND prefix
577 static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
579 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
580 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
581 0x0f, 0x1f, 0 /* nopl (%rax) */
584 /* Subsequent entries for branches with BND prefx in a lazy procedure
585 linkage table look like this. */
587 static const bfd_byte elf_x86_64_lazy_bnd_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
589 0x68, 0, 0, 0, 0, /* pushq immediate */
590 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
591 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
594 /* The first entry in the IBT-enabled lazy procedure linkage table is the
595 the same as the lazy PLT with BND prefix so that bound registers are
596 preserved when control is passed to dynamic linker. Subsequent
597 entries for a IBT-enabled lazy procedure linkage table look like
600 static const bfd_byte elf_x86_64_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
602 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
603 0x68, 0, 0, 0, 0, /* pushq immediate */
604 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
608 /* The first entry in the x32 IBT-enabled lazy procedure linkage table
609 is the same as the normal lazy PLT. Subsequent entries for an
610 x32 IBT-enabled lazy procedure linkage table look like this. */
612 static const bfd_byte elf_x32_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
614 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
615 0x68, 0, 0, 0, 0, /* pushq immediate */
616 0xe9, 0, 0, 0, 0, /* jmpq relative */
617 0x66, 0x90 /* xchg %ax,%ax */
620 /* Entries in the non-lazey procedure linkage table look like this. */
622 static const bfd_byte elf_x86_64_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
624 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
625 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
626 0x66, 0x90 /* xchg %ax,%ax */
629 /* Entries for branches with BND prefix in the non-lazey procedure
630 linkage table look like this. */
632 static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
634 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
635 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
639 /* Entries for branches with IBT-enabled in the non-lazey procedure
640 linkage table look like this. They have the same size as the lazy
643 static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
645 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
646 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
647 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
648 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */
651 /* Entries for branches with IBT-enabled in the x32 non-lazey procedure
652 linkage table look like this. They have the same size as the lazy
655 static const bfd_byte elf_x32_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
657 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
658 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
659 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
660 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
663 /* The TLSDESC entry in a lazy procedure linkage table. */
664 static const bfd_byte elf_x86_64_tlsdesc_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
666 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
667 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
668 0xff, 0x25, 16, 0, 0, 0 /* jmpq *GOT+TDG(%rip) */
671 /* .eh_frame covering the lazy .plt section. */
673 static const bfd_byte elf_x86_64_eh_frame_lazy_plt
[] =
675 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
676 0, 0, 0, 0, /* CIE ID */
678 'z', 'R', 0, /* Augmentation string */
679 1, /* Code alignment factor */
680 0x78, /* Data alignment factor */
681 16, /* Return address column */
682 1, /* Augmentation size */
683 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
684 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
685 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
686 DW_CFA_nop
, DW_CFA_nop
,
688 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
689 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
690 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
691 0, 0, 0, 0, /* .plt size goes here */
692 0, /* Augmentation size */
693 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
694 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
695 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
696 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
697 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
698 11, /* Block length */
699 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
700 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
701 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
702 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
703 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
706 /* .eh_frame covering the lazy BND .plt section. */
708 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt
[] =
710 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
711 0, 0, 0, 0, /* CIE ID */
713 'z', 'R', 0, /* Augmentation string */
714 1, /* Code alignment factor */
715 0x78, /* Data alignment factor */
716 16, /* Return address column */
717 1, /* Augmentation size */
718 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
719 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
720 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
721 DW_CFA_nop
, DW_CFA_nop
,
723 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
724 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
725 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
726 0, 0, 0, 0, /* .plt size goes here */
727 0, /* Augmentation size */
728 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
729 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
730 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
731 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
732 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
733 11, /* Block length */
734 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
735 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
736 DW_OP_lit15
, DW_OP_and
, DW_OP_lit5
, DW_OP_ge
,
737 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
738 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
741 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
743 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt
[] =
745 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
746 0, 0, 0, 0, /* CIE ID */
748 'z', 'R', 0, /* Augmentation string */
749 1, /* Code alignment factor */
750 0x78, /* Data alignment factor */
751 16, /* Return address column */
752 1, /* Augmentation size */
753 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
754 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
755 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
756 DW_CFA_nop
, DW_CFA_nop
,
758 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
759 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
760 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
761 0, 0, 0, 0, /* .plt size goes here */
762 0, /* Augmentation size */
763 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
764 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
765 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
766 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
767 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
768 11, /* Block length */
769 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
770 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
771 DW_OP_lit15
, DW_OP_and
, DW_OP_lit10
, DW_OP_ge
,
772 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
773 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
776 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
778 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt
[] =
780 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
781 0, 0, 0, 0, /* CIE ID */
783 'z', 'R', 0, /* Augmentation string */
784 1, /* Code alignment factor */
785 0x78, /* Data alignment factor */
786 16, /* Return address column */
787 1, /* Augmentation size */
788 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
789 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
790 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
791 DW_CFA_nop
, DW_CFA_nop
,
793 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
794 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
795 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
796 0, 0, 0, 0, /* .plt size goes here */
797 0, /* Augmentation size */
798 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
799 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
800 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
801 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
802 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
803 11, /* Block length */
804 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
805 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
806 DW_OP_lit15
, DW_OP_and
, DW_OP_lit9
, DW_OP_ge
,
807 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
808 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
811 /* .eh_frame covering the non-lazy .plt section. */
813 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt
[] =
815 #define PLT_GOT_FDE_LENGTH 20
816 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
817 0, 0, 0, 0, /* CIE ID */
819 'z', 'R', 0, /* Augmentation string */
820 1, /* Code alignment factor */
821 0x78, /* Data alignment factor */
822 16, /* Return address column */
823 1, /* Augmentation size */
824 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
825 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
826 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
827 DW_CFA_nop
, DW_CFA_nop
,
829 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
830 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
831 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
832 0, 0, 0, 0, /* non-lazy .plt size goes here */
833 0, /* Augmentation size */
834 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
,
835 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
838 /* These are the standard parameters. */
839 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt
=
841 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
842 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
843 elf_x86_64_lazy_plt_entry
, /* plt_entry */
844 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
845 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
846 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
847 6, /* plt_tlsdesc_got1_offset */
848 12, /* plt_tlsdesc_got2_offset */
849 10, /* plt_tlsdesc_got1_insn_end */
850 16, /* plt_tlsdesc_got2_insn_end */
851 2, /* plt0_got1_offset */
852 8, /* plt0_got2_offset */
853 12, /* plt0_got2_insn_end */
854 2, /* plt_got_offset */
855 7, /* plt_reloc_offset */
856 12, /* plt_plt_offset */
857 6, /* plt_got_insn_size */
858 LAZY_PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
859 6, /* plt_lazy_offset */
860 elf_x86_64_lazy_plt0_entry
, /* pic_plt0_entry */
861 elf_x86_64_lazy_plt_entry
, /* pic_plt_entry */
862 elf_x86_64_eh_frame_lazy_plt
, /* eh_frame_plt */
863 sizeof (elf_x86_64_eh_frame_lazy_plt
) /* eh_frame_plt_size */
866 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt
=
868 elf_x86_64_non_lazy_plt_entry
, /* plt_entry */
869 elf_x86_64_non_lazy_plt_entry
, /* pic_plt_entry */
870 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
871 2, /* plt_got_offset */
872 6, /* plt_got_insn_size */
873 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
874 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
877 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt
=
879 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
880 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
881 elf_x86_64_lazy_bnd_plt_entry
, /* plt_entry */
882 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
883 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
884 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
885 6, /* plt_tlsdesc_got1_offset */
886 12, /* plt_tlsdesc_got2_offset */
887 10, /* plt_tlsdesc_got1_insn_end */
888 16, /* plt_tlsdesc_got2_insn_end */
889 2, /* plt0_got1_offset */
890 1+8, /* plt0_got2_offset */
891 1+12, /* plt0_got2_insn_end */
892 1+2, /* plt_got_offset */
893 1, /* plt_reloc_offset */
894 7, /* plt_plt_offset */
895 1+6, /* plt_got_insn_size */
896 11, /* plt_plt_insn_end */
897 0, /* plt_lazy_offset */
898 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
899 elf_x86_64_lazy_bnd_plt_entry
, /* pic_plt_entry */
900 elf_x86_64_eh_frame_lazy_bnd_plt
, /* eh_frame_plt */
901 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt
) /* eh_frame_plt_size */
904 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt
=
906 elf_x86_64_non_lazy_bnd_plt_entry
, /* plt_entry */
907 elf_x86_64_non_lazy_bnd_plt_entry
, /* pic_plt_entry */
908 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
909 1+2, /* plt_got_offset */
910 1+6, /* plt_got_insn_size */
911 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
912 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
915 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt
=
917 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
918 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
919 elf_x86_64_lazy_ibt_plt_entry
, /* plt_entry */
920 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
921 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
922 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
923 6, /* plt_tlsdesc_got1_offset */
924 12, /* plt_tlsdesc_got2_offset */
925 10, /* plt_tlsdesc_got1_insn_end */
926 16, /* plt_tlsdesc_got2_insn_end */
927 2, /* plt0_got1_offset */
928 1+8, /* plt0_got2_offset */
929 1+12, /* plt0_got2_insn_end */
930 4+1+2, /* plt_got_offset */
931 4+1, /* plt_reloc_offset */
932 4+1+6, /* plt_plt_offset */
933 4+1+6, /* plt_got_insn_size */
934 4+1+5+5, /* plt_plt_insn_end */
935 0, /* plt_lazy_offset */
936 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
937 elf_x86_64_lazy_ibt_plt_entry
, /* pic_plt_entry */
938 elf_x86_64_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
939 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
942 static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt
=
944 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
945 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
946 elf_x32_lazy_ibt_plt_entry
, /* plt_entry */
947 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
948 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
949 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
950 6, /* plt_tlsdesc_got1_offset */
951 12, /* plt_tlsdesc_got2_offset */
952 10, /* plt_tlsdesc_got1_insn_end */
953 16, /* plt_tlsdesc_got2_insn_end */
954 2, /* plt0_got1_offset */
955 8, /* plt0_got2_offset */
956 12, /* plt0_got2_insn_end */
957 4+2, /* plt_got_offset */
958 4+1, /* plt_reloc_offset */
959 4+6, /* plt_plt_offset */
960 4+6, /* plt_got_insn_size */
961 4+5+5, /* plt_plt_insn_end */
962 0, /* plt_lazy_offset */
963 elf_x86_64_lazy_plt0_entry
, /* pic_plt0_entry */
964 elf_x32_lazy_ibt_plt_entry
, /* pic_plt_entry */
965 elf_x32_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
966 sizeof (elf_x32_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
969 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt
=
971 elf_x86_64_non_lazy_ibt_plt_entry
, /* plt_entry */
972 elf_x86_64_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
973 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
974 4+1+2, /* plt_got_offset */
975 4+1+6, /* plt_got_insn_size */
976 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
977 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
980 static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt
=
982 elf_x32_non_lazy_ibt_plt_entry
, /* plt_entry */
983 elf_x32_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
984 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
985 4+2, /* plt_got_offset */
986 4+6, /* plt_got_insn_size */
987 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
988 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
991 static const struct elf_x86_backend_data elf_x86_64_arch_bed
=
996 #define elf_backend_arch_data &elf_x86_64_arch_bed
999 elf64_x86_64_elf_object_p (bfd
*abfd
)
1001 /* Set the right machine number for an x86-64 elf64 file. */
1002 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1007 elf32_x86_64_elf_object_p (bfd
*abfd
)
1009 /* Set the right machine number for an x86-64 elf32 file. */
1010 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1014 /* Return TRUE if the TLS access code sequence support transition
1018 elf_x86_64_check_tls_transition (bfd
*abfd
,
1019 struct bfd_link_info
*info
,
1022 Elf_Internal_Shdr
*symtab_hdr
,
1023 struct elf_link_hash_entry
**sym_hashes
,
1024 unsigned int r_type
,
1025 const Elf_Internal_Rela
*rel
,
1026 const Elf_Internal_Rela
*relend
)
1029 unsigned long r_symndx
;
1030 bfd_boolean largepic
= FALSE
;
1031 struct elf_link_hash_entry
*h
;
1033 struct elf_x86_link_hash_table
*htab
;
1035 bfd_boolean indirect_call
;
1037 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1038 offset
= rel
->r_offset
;
1041 case R_X86_64_TLSGD
:
1042 case R_X86_64_TLSLD
:
1043 if ((rel
+ 1) >= relend
)
1046 if (r_type
== R_X86_64_TLSGD
)
1048 /* Check transition from GD access model. For 64bit, only
1049 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1050 .word 0x6666; rex64; call __tls_get_addr@PLT
1052 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1054 call *__tls_get_addr@GOTPCREL(%rip)
1055 which may be converted to
1056 addr32 call __tls_get_addr
1057 can transit to different access model. For 32bit, only
1058 leaq foo@tlsgd(%rip), %rdi
1059 .word 0x6666; rex64; call __tls_get_addr@PLT
1061 leaq foo@tlsgd(%rip), %rdi
1063 call *__tls_get_addr@GOTPCREL(%rip)
1064 which may be converted to
1065 addr32 call __tls_get_addr
1066 can transit to different access model. For largepic,
1068 leaq foo@tlsgd(%rip), %rdi
1069 movabsq $__tls_get_addr@pltoff, %rax
1073 leaq foo@tlsgd(%rip), %rdi
1074 movabsq $__tls_get_addr@pltoff, %rax
1078 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1080 if ((offset
+ 12) > sec
->size
)
1083 call
= contents
+ offset
+ 4;
1085 || !((call
[1] == 0x48
1093 && call
[3] == 0xe8)))
1095 if (!ABI_64_P (abfd
)
1096 || (offset
+ 19) > sec
->size
1098 || memcmp (call
- 7, leaq
+ 1, 3) != 0
1099 || memcmp (call
, "\x48\xb8", 2) != 0
1103 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1104 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1108 else if (ABI_64_P (abfd
))
1111 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1117 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1120 indirect_call
= call
[2] == 0xff;
1124 /* Check transition from LD access model. Only
1125 leaq foo@tlsld(%rip), %rdi;
1126 call __tls_get_addr@PLT
1128 leaq foo@tlsld(%rip), %rdi;
1129 call *__tls_get_addr@GOTPCREL(%rip)
1130 which may be converted to
1131 addr32 call __tls_get_addr
1132 can transit to different access model. For largepic
1134 leaq foo@tlsld(%rip), %rdi
1135 movabsq $__tls_get_addr@pltoff, %rax
1139 leaq foo@tlsld(%rip), %rdi
1140 movabsq $__tls_get_addr@pltoff, %rax
1144 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1146 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1149 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1152 call
= contents
+ offset
+ 4;
1153 if (!(call
[0] == 0xe8
1154 || (call
[0] == 0xff && call
[1] == 0x15)
1155 || (call
[0] == 0x67 && call
[1] == 0xe8)))
1157 if (!ABI_64_P (abfd
)
1158 || (offset
+ 19) > sec
->size
1159 || memcmp (call
, "\x48\xb8", 2) != 0
1163 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1164 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1168 indirect_call
= call
[0] == 0xff;
1171 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1172 if (r_symndx
< symtab_hdr
->sh_info
)
1175 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1177 || !((struct elf_x86_link_hash_entry
*) h
)->tls_get_addr
)
1181 r_type
= (ELF32_R_TYPE (rel
[1].r_info
)
1182 & ~R_X86_64_converted_reloc_bit
);
1184 return r_type
== R_X86_64_PLTOFF64
;
1185 else if (indirect_call
)
1186 return r_type
== R_X86_64_GOTPCRELX
;
1188 return (r_type
== R_X86_64_PC32
|| r_type
== R_X86_64_PLT32
);
1191 case R_X86_64_GOTTPOFF
:
1192 /* Check transition from IE access model:
1193 mov foo@gottpoff(%rip), %reg
1194 add foo@gottpoff(%rip), %reg
1197 /* Check REX prefix first. */
1198 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1200 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1201 if (val
!= 0x48 && val
!= 0x4c)
1203 /* X32 may have 0x44 REX prefix or no REX prefix. */
1204 if (ABI_64_P (abfd
))
1210 /* X32 may not have any REX prefix. */
1211 if (ABI_64_P (abfd
))
1213 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1217 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1218 if (val
!= 0x8b && val
!= 0x03)
1221 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1222 return (val
& 0xc7) == 5;
1224 case R_X86_64_GOTPC32_TLSDESC
:
1225 /* Check transition from GDesc access model:
1226 leaq x@tlsdesc(%rip), %rax
1228 Make sure it's a leaq adding rip to a 32-bit offset
1229 into any register, although it's probably almost always
1232 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1235 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1236 if ((val
& 0xfb) != 0x48)
1239 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1242 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1243 return (val
& 0xc7) == 0x05;
1245 case R_X86_64_TLSDESC_CALL
:
1246 /* Check transition from GDesc access model:
1247 call *x@tlsdesc(%rax)
1249 if (offset
+ 2 <= sec
->size
)
1251 /* Make sure that it's a call *x@tlsdesc(%rax). */
1252 call
= contents
+ offset
;
1253 return call
[0] == 0xff && call
[1] == 0x10;
1263 /* Return TRUE if the TLS access transition is OK or no transition
1264 will be performed. Update R_TYPE if there is a transition. */
1267 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1268 asection
*sec
, bfd_byte
*contents
,
1269 Elf_Internal_Shdr
*symtab_hdr
,
1270 struct elf_link_hash_entry
**sym_hashes
,
1271 unsigned int *r_type
, int tls_type
,
1272 const Elf_Internal_Rela
*rel
,
1273 const Elf_Internal_Rela
*relend
,
1274 struct elf_link_hash_entry
*h
,
1275 unsigned long r_symndx
,
1276 bfd_boolean from_relocate_section
)
1278 unsigned int from_type
= *r_type
;
1279 unsigned int to_type
= from_type
;
1280 bfd_boolean check
= TRUE
;
1282 /* Skip TLS transition for functions. */
1284 && (h
->type
== STT_FUNC
1285 || h
->type
== STT_GNU_IFUNC
))
1290 case R_X86_64_TLSGD
:
1291 case R_X86_64_GOTPC32_TLSDESC
:
1292 case R_X86_64_TLSDESC_CALL
:
1293 case R_X86_64_GOTTPOFF
:
1294 if (bfd_link_executable (info
))
1297 to_type
= R_X86_64_TPOFF32
;
1299 to_type
= R_X86_64_GOTTPOFF
;
1302 /* When we are called from elf_x86_64_relocate_section, there may
1303 be additional transitions based on TLS_TYPE. */
1304 if (from_relocate_section
)
1306 unsigned int new_to_type
= to_type
;
1308 if (TLS_TRANSITION_IE_TO_LE_P (info
, h
, tls_type
))
1309 new_to_type
= R_X86_64_TPOFF32
;
1311 if (to_type
== R_X86_64_TLSGD
1312 || to_type
== R_X86_64_GOTPC32_TLSDESC
1313 || to_type
== R_X86_64_TLSDESC_CALL
)
1315 if (tls_type
== GOT_TLS_IE
)
1316 new_to_type
= R_X86_64_GOTTPOFF
;
1319 /* We checked the transition before when we were called from
1320 elf_x86_64_check_relocs. We only want to check the new
1321 transition which hasn't been checked before. */
1322 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1323 to_type
= new_to_type
;
1328 case R_X86_64_TLSLD
:
1329 if (bfd_link_executable (info
))
1330 to_type
= R_X86_64_TPOFF32
;
1337 /* Return TRUE if there is no transition. */
1338 if (from_type
== to_type
)
1341 /* Check if the transition can be performed. */
1343 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1344 symtab_hdr
, sym_hashes
,
1345 from_type
, rel
, relend
))
1347 reloc_howto_type
*from
, *to
;
1350 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1351 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1353 if (from
== NULL
|| to
== NULL
)
1357 name
= h
->root
.root
.string
;
1360 struct elf_x86_link_hash_table
*htab
;
1362 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1367 Elf_Internal_Sym
*isym
;
1369 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1371 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1376 /* xgettext:c-format */
1377 (_("%pB: TLS transition from %s to %s against `%s' at %#" PRIx64
1378 " in section `%pA' failed"),
1379 abfd
, from
->name
, to
->name
, name
, (uint64_t) rel
->r_offset
, sec
);
1380 bfd_set_error (bfd_error_bad_value
);
1388 /* Rename some of the generic section flags to better document how they
1390 #define check_relocs_failed sec_flg0
1393 elf_x86_64_need_pic (struct bfd_link_info
*info
,
1394 bfd
*input_bfd
, asection
*sec
,
1395 struct elf_link_hash_entry
*h
,
1396 Elf_Internal_Shdr
*symtab_hdr
,
1397 Elf_Internal_Sym
*isym
,
1398 reloc_howto_type
*howto
)
1401 const char *und
= "";
1402 const char *pic
= "";
1408 name
= h
->root
.root
.string
;
1409 switch (ELF_ST_VISIBILITY (h
->other
))
1412 v
= _("hidden symbol ");
1415 v
= _("internal symbol ");
1418 v
= _("protected symbol ");
1421 if (((struct elf_x86_link_hash_entry
*) h
)->def_protected
)
1422 v
= _("protected symbol ");
1425 pic
= _("; recompile with -fPIC");
1429 if (!h
->def_regular
&& !h
->def_dynamic
)
1430 und
= _("undefined ");
1434 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, isym
, NULL
);
1435 pic
= _("; recompile with -fPIC");
1438 if (bfd_link_dll (info
))
1439 object
= _("a shared object");
1440 else if (bfd_link_pie (info
))
1441 object
= _("a PIE object");
1443 object
= _("a PDE object");
1445 /* xgettext:c-format */
1446 _bfd_error_handler (_("%pB: relocation %s against %s%s`%s' can "
1447 "not be used when making %s%s"),
1448 input_bfd
, howto
->name
, und
, v
, name
,
1450 bfd_set_error (bfd_error_bad_value
);
1451 sec
->check_relocs_failed
= 1;
1455 /* With the local symbol, foo, we convert
1456 mov foo@GOTPCREL(%rip), %reg
1460 call/jmp *foo@GOTPCREL(%rip)
1462 nop call foo/jmp foo nop
1463 When PIC is false, convert
1464 test %reg, foo@GOTPCREL(%rip)
1468 binop foo@GOTPCREL(%rip), %reg
1471 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1475 elf_x86_64_convert_load_reloc (bfd
*abfd
,
1477 unsigned int *r_type_p
,
1478 Elf_Internal_Rela
*irel
,
1479 struct elf_link_hash_entry
*h
,
1480 bfd_boolean
*converted
,
1481 struct bfd_link_info
*link_info
)
1483 struct elf_x86_link_hash_table
*htab
;
1485 bfd_boolean no_overflow
;
1487 bfd_boolean to_reloc_pc32
;
1489 bfd_signed_vma raddend
;
1490 unsigned int opcode
;
1492 unsigned int r_type
= *r_type_p
;
1493 unsigned int r_symndx
;
1494 bfd_vma roff
= irel
->r_offset
;
1496 if (roff
< (r_type
== R_X86_64_REX_GOTPCRELX
? 3 : 2))
1499 raddend
= irel
->r_addend
;
1500 /* Addend for 32-bit PC-relative relocation must be -4. */
1504 htab
= elf_x86_hash_table (link_info
, X86_64_ELF_DATA
);
1505 is_pic
= bfd_link_pic (link_info
);
1507 relocx
= (r_type
== R_X86_64_GOTPCRELX
1508 || r_type
== R_X86_64_REX_GOTPCRELX
);
1510 /* TRUE if --no-relax is used. */
1511 no_overflow
= link_info
->disable_target_specific_optimizations
> 1;
1513 r_symndx
= htab
->r_sym (irel
->r_info
);
1515 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1517 /* Convert mov to lea since it has been done for a while. */
1520 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
1521 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
1522 test, xor instructions. */
1527 /* We convert only to R_X86_64_PC32:
1529 2. R_X86_64_GOTPCREL since we can't modify REX byte.
1530 3. no_overflow is true.
1533 to_reloc_pc32
= (opcode
== 0xff
1538 /* Get the symbol referred to by the reloc. */
1541 Elf_Internal_Sym
*isym
1542 = bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
, r_symndx
);
1544 /* Skip relocation against undefined symbols. */
1545 if (isym
->st_shndx
== SHN_UNDEF
)
1548 if (isym
->st_shndx
== SHN_ABS
)
1549 tsec
= bfd_abs_section_ptr
;
1550 else if (isym
->st_shndx
== SHN_COMMON
)
1551 tsec
= bfd_com_section_ptr
;
1552 else if (isym
->st_shndx
== SHN_X86_64_LCOMMON
)
1553 tsec
= &_bfd_elf_large_com_section
;
1555 tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1559 /* Undefined weak symbol is only bound locally in executable
1560 and its reference is resolved as 0 without relocation
1561 overflow. We can only perform this optimization for
1562 GOTPCRELX relocations since we need to modify REX byte.
1563 It is OK convert mov with R_X86_64_GOTPCREL to
1565 bfd_boolean local_ref
;
1566 struct elf_x86_link_hash_entry
*eh
= elf_x86_hash_entry (h
);
1568 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1569 local_ref
= SYMBOL_REFERENCES_LOCAL_P (link_info
, h
);
1570 if ((relocx
|| opcode
== 0x8b)
1571 && (h
->root
.type
== bfd_link_hash_undefweak
1577 /* Skip for branch instructions since R_X86_64_PC32
1584 /* For non-branch instructions, we can convert to
1585 R_X86_64_32/R_X86_64_32S since we know if there
1587 to_reloc_pc32
= FALSE
;
1590 /* Since we don't know the current PC when PIC is true,
1591 we can't convert to R_X86_64_PC32. */
1592 if (to_reloc_pc32
&& is_pic
)
1597 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
1598 ld.so may use its link-time address. */
1599 else if (h
->start_stop
1602 || h
->root
.type
== bfd_link_hash_defined
1603 || h
->root
.type
== bfd_link_hash_defweak
)
1604 && h
!= htab
->elf
.hdynamic
1607 /* bfd_link_hash_new or bfd_link_hash_undefined is
1608 set by an assignment in a linker script in
1609 bfd_elf_record_link_assignment. start_stop is set
1610 on __start_SECNAME/__stop_SECNAME which mark section
1615 && (h
->root
.type
== bfd_link_hash_new
1616 || h
->root
.type
== bfd_link_hash_undefined
1617 || ((h
->root
.type
== bfd_link_hash_defined
1618 || h
->root
.type
== bfd_link_hash_defweak
)
1619 && h
->root
.u
.def
.section
== bfd_und_section_ptr
))))
1621 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
1626 tsec
= h
->root
.u
.def
.section
;
1632 /* Don't convert GOTPCREL relocation against large section. */
1633 if (elf_section_data (tsec
) != NULL
1634 && (elf_section_flags (tsec
) & SHF_X86_64_LARGE
) != 0)
1637 /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */
1644 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
1649 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
1651 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1654 /* Convert to "jmp foo nop". */
1657 nop_offset
= irel
->r_offset
+ 3;
1658 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1659 irel
->r_offset
-= 1;
1660 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1664 struct elf_x86_link_hash_entry
*eh
1665 = (struct elf_x86_link_hash_entry
*) h
;
1667 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1670 /* To support TLS optimization, always use addr32 prefix for
1671 "call *__tls_get_addr@GOTPCREL(%rip)". */
1672 if (eh
&& eh
->tls_get_addr
)
1675 nop_offset
= irel
->r_offset
- 2;
1679 nop
= link_info
->call_nop_byte
;
1680 if (link_info
->call_nop_as_suffix
)
1682 nop_offset
= irel
->r_offset
+ 3;
1683 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1684 irel
->r_offset
-= 1;
1685 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1688 nop_offset
= irel
->r_offset
- 2;
1691 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1692 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1693 r_type
= R_X86_64_PC32
;
1698 unsigned int rex_mask
= REX_R
;
1700 if (r_type
== R_X86_64_REX_GOTPCRELX
)
1701 rex
= bfd_get_8 (abfd
, contents
+ roff
- 3);
1709 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1710 "lea foo(%rip), %reg". */
1712 r_type
= R_X86_64_PC32
;
1716 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1717 "mov $foo, %reg". */
1719 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1720 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1721 if ((rex
& REX_W
) != 0
1722 && ABI_64_P (link_info
->output_bfd
))
1724 /* Keep the REX_W bit in REX byte for LP64. */
1725 r_type
= R_X86_64_32S
;
1726 goto rewrite_modrm_rex
;
1730 /* If the REX_W bit in REX byte isn't needed,
1731 use R_X86_64_32 and clear the W bit to avoid
1732 sign-extend imm32 to imm64. */
1733 r_type
= R_X86_64_32
;
1734 /* Clear the W bit in REX byte. */
1736 goto rewrite_modrm_rex
;
1742 /* R_X86_64_PC32 isn't supported. */
1746 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1749 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
1750 "test $foo, %reg". */
1751 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1756 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
1757 "binop $foo, %reg". */
1758 modrm
= 0xc0 | (modrm
& 0x38) >> 3 | (opcode
& 0x3c);
1762 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
1763 overflow when sign-extending imm32 to imm64. */
1764 r_type
= (rex
& REX_W
) != 0 ? R_X86_64_32S
: R_X86_64_32
;
1767 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1771 /* Move the R bit to the B bit in REX byte. */
1772 rex
= (rex
& ~rex_mask
) | (rex
& REX_R
) >> 2;
1773 bfd_put_8 (abfd
, rex
, contents
+ roff
- 3);
1776 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
1780 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1784 irel
->r_info
= htab
->r_info (r_symndx
,
1785 r_type
| R_X86_64_converted_reloc_bit
);
1792 /* Look through the relocs for a section during the first phase, and
1793 calculate needed space in the global offset table, procedure
1794 linkage table, and dynamic reloc sections. */
1797 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1799 const Elf_Internal_Rela
*relocs
)
1801 struct elf_x86_link_hash_table
*htab
;
1802 Elf_Internal_Shdr
*symtab_hdr
;
1803 struct elf_link_hash_entry
**sym_hashes
;
1804 const Elf_Internal_Rela
*rel
;
1805 const Elf_Internal_Rela
*rel_end
;
1808 bfd_boolean converted
;
1810 if (bfd_link_relocatable (info
))
1813 /* Don't do anything special with non-loaded, non-alloced sections.
1814 In particular, any relocs in such sections should not affect GOT
1815 and PLT reference counting (ie. we don't allow them to create GOT
1816 or PLT entries), there's no possibility or desire to optimize TLS
1817 relocs, and there's not much point in propagating relocs to shared
1818 libs that the dynamic linker won't relocate. */
1819 if ((sec
->flags
& SEC_ALLOC
) == 0)
1822 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1825 sec
->check_relocs_failed
= 1;
1829 BFD_ASSERT (is_x86_elf (abfd
, htab
));
1831 /* Get the section contents. */
1832 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1833 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1834 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1836 sec
->check_relocs_failed
= 1;
1840 symtab_hdr
= &elf_symtab_hdr (abfd
);
1841 sym_hashes
= elf_sym_hashes (abfd
);
1847 rel_end
= relocs
+ sec
->reloc_count
;
1848 for (rel
= relocs
; rel
< rel_end
; rel
++)
1850 unsigned int r_type
;
1851 unsigned int r_symndx
;
1852 struct elf_link_hash_entry
*h
;
1853 struct elf_x86_link_hash_entry
*eh
;
1854 Elf_Internal_Sym
*isym
;
1856 bfd_boolean size_reloc
;
1857 bfd_boolean converted_reloc
;
1859 r_symndx
= htab
->r_sym (rel
->r_info
);
1860 r_type
= ELF32_R_TYPE (rel
->r_info
);
1862 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1864 /* xgettext:c-format */
1865 _bfd_error_handler (_("%pB: bad symbol index: %d"),
1870 if (r_symndx
< symtab_hdr
->sh_info
)
1872 /* A local symbol. */
1873 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1878 /* Check relocation against local STT_GNU_IFUNC symbol. */
1879 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1881 h
= _bfd_elf_x86_get_local_sym_hash (htab
, abfd
, rel
,
1886 /* Fake a STT_GNU_IFUNC symbol. */
1887 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1889 h
->type
= STT_GNU_IFUNC
;
1892 h
->forced_local
= 1;
1893 h
->root
.type
= bfd_link_hash_defined
;
1901 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1902 while (h
->root
.type
== bfd_link_hash_indirect
1903 || h
->root
.type
== bfd_link_hash_warning
)
1904 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1907 /* Check invalid x32 relocations. */
1908 if (!ABI_64_P (abfd
))
1914 case R_X86_64_DTPOFF64
:
1915 case R_X86_64_TPOFF64
:
1917 case R_X86_64_GOTOFF64
:
1918 case R_X86_64_GOT64
:
1919 case R_X86_64_GOTPCREL64
:
1920 case R_X86_64_GOTPC64
:
1921 case R_X86_64_GOTPLT64
:
1922 case R_X86_64_PLTOFF64
:
1925 name
= h
->root
.root
.string
;
1927 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1930 /* xgettext:c-format */
1931 (_("%pB: relocation %s against symbol `%s' isn't "
1932 "supported in x32 mode"), abfd
,
1933 x86_64_elf_howto_table
[r_type
].name
, name
);
1934 bfd_set_error (bfd_error_bad_value
);
1942 /* It is referenced by a non-shared object. */
1945 if (h
->type
== STT_GNU_IFUNC
)
1946 elf_tdata (info
->output_bfd
)->has_gnu_symbols
1947 |= elf_gnu_symbol_ifunc
;
1950 converted_reloc
= FALSE
;
1951 if ((r_type
== R_X86_64_GOTPCREL
1952 || r_type
== R_X86_64_GOTPCRELX
1953 || r_type
== R_X86_64_REX_GOTPCRELX
)
1954 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1956 Elf_Internal_Rela
*irel
= (Elf_Internal_Rela
*) rel
;
1957 if (!elf_x86_64_convert_load_reloc (abfd
, contents
, &r_type
,
1958 irel
, h
, &converted_reloc
,
1962 if (converted_reloc
)
1966 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, contents
,
1967 symtab_hdr
, sym_hashes
,
1968 &r_type
, GOT_UNKNOWN
,
1969 rel
, rel_end
, h
, r_symndx
, FALSE
))
1972 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1973 if (h
== htab
->elf
.hgot
)
1974 htab
->got_referenced
= TRUE
;
1976 eh
= (struct elf_x86_link_hash_entry
*) h
;
1979 case R_X86_64_TLSLD
:
1980 htab
->tls_ld_or_ldm_got
.refcount
= 1;
1983 case R_X86_64_TPOFF32
:
1984 if (!bfd_link_executable (info
) && ABI_64_P (abfd
))
1985 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
1986 &x86_64_elf_howto_table
[r_type
]);
1988 eh
->zero_undefweak
&= 0x2;
1991 case R_X86_64_GOTTPOFF
:
1992 if (!bfd_link_executable (info
))
1993 info
->flags
|= DF_STATIC_TLS
;
1996 case R_X86_64_GOT32
:
1997 case R_X86_64_GOTPCREL
:
1998 case R_X86_64_GOTPCRELX
:
1999 case R_X86_64_REX_GOTPCRELX
:
2000 case R_X86_64_TLSGD
:
2001 case R_X86_64_GOT64
:
2002 case R_X86_64_GOTPCREL64
:
2003 case R_X86_64_GOTPLT64
:
2004 case R_X86_64_GOTPC32_TLSDESC
:
2005 case R_X86_64_TLSDESC_CALL
:
2006 /* This symbol requires a global offset table entry. */
2008 int tls_type
, old_tls_type
;
2012 default: tls_type
= GOT_NORMAL
; break;
2013 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
2014 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
2015 case R_X86_64_GOTPC32_TLSDESC
:
2016 case R_X86_64_TLSDESC_CALL
:
2017 tls_type
= GOT_TLS_GDESC
; break;
2022 h
->got
.refcount
= 1;
2023 old_tls_type
= eh
->tls_type
;
2027 bfd_signed_vma
*local_got_refcounts
;
2029 /* This is a global offset table entry for a local symbol. */
2030 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2031 if (local_got_refcounts
== NULL
)
2035 size
= symtab_hdr
->sh_info
;
2036 size
*= sizeof (bfd_signed_vma
)
2037 + sizeof (bfd_vma
) + sizeof (char);
2038 local_got_refcounts
= ((bfd_signed_vma
*)
2039 bfd_zalloc (abfd
, size
));
2040 if (local_got_refcounts
== NULL
)
2042 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2043 elf_x86_local_tlsdesc_gotent (abfd
)
2044 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2045 elf_x86_local_got_tls_type (abfd
)
2046 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2048 local_got_refcounts
[r_symndx
] = 1;
2050 = elf_x86_local_got_tls_type (abfd
) [r_symndx
];
2053 /* If a TLS symbol is accessed using IE at least once,
2054 there is no point to use dynamic model for it. */
2055 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2056 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2057 || tls_type
!= GOT_TLS_IE
))
2059 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
2060 tls_type
= old_tls_type
;
2061 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2062 && GOT_TLS_GD_ANY_P (tls_type
))
2063 tls_type
|= old_tls_type
;
2067 name
= h
->root
.root
.string
;
2069 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
2072 /* xgettext:c-format */
2073 (_("%pB: '%s' accessed both as normal and"
2074 " thread local symbol"),
2076 bfd_set_error (bfd_error_bad_value
);
2081 if (old_tls_type
!= tls_type
)
2084 eh
->tls_type
= tls_type
;
2086 elf_x86_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2091 case R_X86_64_GOTOFF64
:
2092 case R_X86_64_GOTPC32
:
2093 case R_X86_64_GOTPC64
:
2096 eh
->zero_undefweak
&= 0x2;
2099 case R_X86_64_PLT32
:
2100 case R_X86_64_PLT32_BND
:
2101 /* This symbol requires a procedure linkage table entry. We
2102 actually build the entry in adjust_dynamic_symbol,
2103 because this might be a case of linking PIC code which is
2104 never referenced by a dynamic object, in which case we
2105 don't need to generate a procedure linkage table entry
2108 /* If this is a local symbol, we resolve it directly without
2109 creating a procedure linkage table entry. */
2113 eh
->zero_undefweak
&= 0x2;
2115 h
->plt
.refcount
= 1;
2118 case R_X86_64_PLTOFF64
:
2119 /* This tries to form the 'address' of a function relative
2120 to GOT. For global symbols we need a PLT entry. */
2124 h
->plt
.refcount
= 1;
2128 case R_X86_64_SIZE32
:
2129 case R_X86_64_SIZE64
:
2134 if (!ABI_64_P (abfd
))
2140 /* Check relocation overflow as these relocs may lead to
2141 run-time relocation overflow. Don't error out for
2142 sections we don't care about, such as debug sections or
2143 when relocation overflow check is disabled. */
2144 if (!info
->no_reloc_overflow_check
2146 && (bfd_link_pic (info
)
2147 || (bfd_link_executable (info
)
2151 && (sec
->flags
& SEC_READONLY
) == 0)))
2152 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
2153 &x86_64_elf_howto_table
[r_type
]);
2159 case R_X86_64_PC32_BND
:
2163 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2164 eh
->zero_undefweak
|= 0x2;
2165 /* We are called after all symbols have been resolved. Only
2166 relocation against STT_GNU_IFUNC symbol must go through
2169 && (bfd_link_executable (info
)
2170 || h
->type
== STT_GNU_IFUNC
))
2172 bfd_boolean func_pointer_ref
= FALSE
;
2174 if (r_type
== R_X86_64_PC32
)
2176 /* Since something like ".long foo - ." may be used
2177 as pointer, make sure that PLT is used if foo is
2178 a function defined in a shared library. */
2179 if ((sec
->flags
& SEC_CODE
) == 0)
2181 h
->pointer_equality_needed
= 1;
2182 if (bfd_link_pie (info
)
2183 && h
->type
== STT_FUNC
2188 h
->plt
.refcount
= 1;
2192 else if (r_type
!= R_X86_64_PC32_BND
2193 && r_type
!= R_X86_64_PC64
)
2195 h
->pointer_equality_needed
= 1;
2196 /* At run-time, R_X86_64_64 can be resolved for both
2197 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2198 can only be resolved for x32. */
2199 if ((sec
->flags
& SEC_READONLY
) == 0
2200 && (r_type
== R_X86_64_64
2201 || (!ABI_64_P (abfd
)
2202 && (r_type
== R_X86_64_32
2203 || r_type
== R_X86_64_32S
))))
2204 func_pointer_ref
= TRUE
;
2207 if (!func_pointer_ref
)
2209 /* If this reloc is in a read-only section, we might
2210 need a copy reloc. We can't check reliably at this
2211 stage whether the section is read-only, as input
2212 sections have not yet been mapped to output sections.
2213 Tentatively set the flag for now, and correct in
2214 adjust_dynamic_symbol. */
2217 /* We may need a .plt entry if the symbol is a function
2218 defined in a shared lib or is a function referenced
2219 from the code or read-only section. */
2221 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2222 h
->plt
.refcount
= 1;
2228 if (NEED_DYNAMIC_RELOCATION_P (info
, TRUE
, h
, sec
, r_type
,
2229 htab
->pointer_r_type
))
2231 struct elf_dyn_relocs
*p
;
2232 struct elf_dyn_relocs
**head
;
2234 /* We must copy these reloc types into the output file.
2235 Create a reloc section in dynobj and make room for
2239 sreloc
= _bfd_elf_make_dynamic_reloc_section
2240 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2241 abfd
, /*rela?*/ TRUE
);
2247 /* If this is a global symbol, we count the number of
2248 relocations we need for this symbol. */
2250 head
= &eh
->dyn_relocs
;
2253 /* Track dynamic relocs needed for local syms too.
2254 We really need local syms available to do this
2259 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2264 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2268 /* Beware of type punned pointers vs strict aliasing
2270 vpp
= &(elf_section_data (s
)->local_dynrel
);
2271 head
= (struct elf_dyn_relocs
**)vpp
;
2275 if (p
== NULL
|| p
->sec
!= sec
)
2277 bfd_size_type amt
= sizeof *p
;
2279 p
= ((struct elf_dyn_relocs
*)
2280 bfd_alloc (htab
->elf
.dynobj
, amt
));
2291 /* Count size relocation as PC-relative relocation. */
2292 if (X86_PCREL_TYPE_P (r_type
) || size_reloc
)
2297 /* This relocation describes the C++ object vtable hierarchy.
2298 Reconstruct it for later use during GC. */
2299 case R_X86_64_GNU_VTINHERIT
:
2300 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2304 /* This relocation describes which C++ vtable entries are actually
2305 used. Record for later use during GC. */
2306 case R_X86_64_GNU_VTENTRY
:
2307 BFD_ASSERT (h
!= NULL
);
2309 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2318 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2320 if (!converted
&& !info
->keep_memory
)
2324 /* Cache the section contents for elf_link_input_bfd if any
2325 load is converted or --no-keep-memory isn't used. */
2326 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2330 /* Cache relocations if any load is converted. */
2331 if (elf_section_data (sec
)->relocs
!= relocs
&& converted
)
2332 elf_section_data (sec
)->relocs
= (Elf_Internal_Rela
*) relocs
;
2337 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2339 sec
->check_relocs_failed
= 1;
2343 /* Return the relocation value for @tpoff relocation
2344 if STT_TLS virtual address is ADDRESS. */
2347 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2349 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2350 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
2351 bfd_vma static_tls_size
;
2353 /* If tls_segment is NULL, we should have signalled an error already. */
2354 if (htab
->tls_sec
== NULL
)
2357 /* Consider special static TLS alignment requirements. */
2358 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
2359 return address
- static_tls_size
- htab
->tls_sec
->vma
;
2362 /* Relocate an x86_64 ELF section. */
2365 elf_x86_64_relocate_section (bfd
*output_bfd
,
2366 struct bfd_link_info
*info
,
2368 asection
*input_section
,
2370 Elf_Internal_Rela
*relocs
,
2371 Elf_Internal_Sym
*local_syms
,
2372 asection
**local_sections
)
2374 struct elf_x86_link_hash_table
*htab
;
2375 Elf_Internal_Shdr
*symtab_hdr
;
2376 struct elf_link_hash_entry
**sym_hashes
;
2377 bfd_vma
*local_got_offsets
;
2378 bfd_vma
*local_tlsdesc_gotents
;
2379 Elf_Internal_Rela
*rel
;
2380 Elf_Internal_Rela
*wrel
;
2381 Elf_Internal_Rela
*relend
;
2382 unsigned int plt_entry_size
;
2384 /* Skip if check_relocs failed. */
2385 if (input_section
->check_relocs_failed
)
2388 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
2392 BFD_ASSERT (is_x86_elf (input_bfd
, htab
));
2394 plt_entry_size
= htab
->plt
.plt_entry_size
;
2395 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2396 sym_hashes
= elf_sym_hashes (input_bfd
);
2397 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2398 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
2400 _bfd_x86_elf_set_tls_module_base (info
);
2402 rel
= wrel
= relocs
;
2403 relend
= relocs
+ input_section
->reloc_count
;
2404 for (; rel
< relend
; wrel
++, rel
++)
2406 unsigned int r_type
, r_type_tls
;
2407 reloc_howto_type
*howto
;
2408 unsigned long r_symndx
;
2409 struct elf_link_hash_entry
*h
;
2410 struct elf_x86_link_hash_entry
*eh
;
2411 Elf_Internal_Sym
*sym
;
2413 bfd_vma off
, offplt
, plt_offset
;
2415 bfd_boolean unresolved_reloc
;
2416 bfd_reloc_status_type r
;
2418 asection
*base_got
, *resolved_plt
;
2420 bfd_boolean resolved_to_zero
;
2421 bfd_boolean relative_reloc
;
2422 bfd_boolean converted_reloc
;
2423 bfd_boolean need_copy_reloc_in_pie
;
2425 r_type
= ELF32_R_TYPE (rel
->r_info
);
2426 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
2427 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
2434 converted_reloc
= (r_type
& R_X86_64_converted_reloc_bit
) != 0;
2435 r_type
&= ~R_X86_64_converted_reloc_bit
;
2437 if (r_type
>= (int) R_X86_64_standard
)
2438 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
2440 if (r_type
!= (int) R_X86_64_32
2441 || ABI_64_P (output_bfd
))
2442 howto
= x86_64_elf_howto_table
+ r_type
;
2444 howto
= (x86_64_elf_howto_table
2445 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
2446 r_symndx
= htab
->r_sym (rel
->r_info
);
2450 unresolved_reloc
= FALSE
;
2451 if (r_symndx
< symtab_hdr
->sh_info
)
2453 sym
= local_syms
+ r_symndx
;
2454 sec
= local_sections
[r_symndx
];
2456 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
2458 st_size
= sym
->st_size
;
2460 /* Relocate against local STT_GNU_IFUNC symbol. */
2461 if (!bfd_link_relocatable (info
)
2462 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2464 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
,
2469 /* Set STT_GNU_IFUNC symbol value. */
2470 h
->root
.u
.def
.value
= sym
->st_value
;
2471 h
->root
.u
.def
.section
= sec
;
2476 bfd_boolean warned ATTRIBUTE_UNUSED
;
2477 bfd_boolean ignored ATTRIBUTE_UNUSED
;
2479 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2480 r_symndx
, symtab_hdr
, sym_hashes
,
2482 unresolved_reloc
, warned
, ignored
);
2486 if (sec
!= NULL
&& discarded_section (sec
))
2488 _bfd_clear_contents (howto
, input_bfd
, input_section
,
2489 contents
+ rel
->r_offset
);
2490 wrel
->r_offset
= rel
->r_offset
;
2494 /* For ld -r, remove relocations in debug sections against
2495 sections defined in discarded sections. Not done for
2496 eh_frame editing code expects to be present. */
2497 if (bfd_link_relocatable (info
)
2498 && (input_section
->flags
& SEC_DEBUGGING
))
2504 if (bfd_link_relocatable (info
))
2511 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
2513 if (r_type
== R_X86_64_64
)
2515 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
2516 zero-extend it to 64bit if addend is zero. */
2517 r_type
= R_X86_64_32
;
2518 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2520 else if (r_type
== R_X86_64_SIZE64
)
2522 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
2523 zero-extend it to 64bit if addend is zero. */
2524 r_type
= R_X86_64_SIZE32
;
2525 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2529 eh
= (struct elf_x86_link_hash_entry
*) h
;
2531 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2532 it here if it is defined in a non-shared object. */
2534 && h
->type
== STT_GNU_IFUNC
2540 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2542 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2543 STT_GNU_IFUNC symbol as STT_FUNC. */
2544 if (elf_section_type (input_section
) == SHT_NOTE
)
2546 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2547 sections because such sections are not SEC_ALLOC and
2548 thus ld.so will not process them. */
2549 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2559 case R_X86_64_GOTPCREL
:
2560 case R_X86_64_GOTPCRELX
:
2561 case R_X86_64_REX_GOTPCRELX
:
2562 case R_X86_64_GOTPCREL64
:
2563 base_got
= htab
->elf
.sgot
;
2564 off
= h
->got
.offset
;
2566 if (base_got
== NULL
)
2569 if (off
== (bfd_vma
) -1)
2571 /* We can't use h->got.offset here to save state, or
2572 even just remember the offset, as finish_dynamic_symbol
2573 would use that as offset into .got. */
2575 if (h
->plt
.offset
== (bfd_vma
) -1)
2578 if (htab
->elf
.splt
!= NULL
)
2580 plt_index
= (h
->plt
.offset
/ plt_entry_size
2581 - htab
->plt
.has_plt0
);
2582 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2583 base_got
= htab
->elf
.sgotplt
;
2587 plt_index
= h
->plt
.offset
/ plt_entry_size
;
2588 off
= plt_index
* GOT_ENTRY_SIZE
;
2589 base_got
= htab
->elf
.igotplt
;
2592 if (h
->dynindx
== -1
2596 /* This references the local defitionion. We must
2597 initialize this entry in the global offset table.
2598 Since the offset must always be a multiple of 8,
2599 we use the least significant bit to record
2600 whether we have initialized it already.
2602 When doing a dynamic link, we create a .rela.got
2603 relocation entry to initialize the value. This
2604 is done in the finish_dynamic_symbol routine. */
2609 bfd_put_64 (output_bfd
, relocation
,
2610 base_got
->contents
+ off
);
2611 /* Note that this is harmless for the GOTPLT64
2612 case, as -1 | 1 still is -1. */
2618 relocation
= (base_got
->output_section
->vma
2619 + base_got
->output_offset
+ off
);
2624 if (h
->plt
.offset
== (bfd_vma
) -1)
2626 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2627 if (r_type
== htab
->pointer_r_type
2628 && (input_section
->flags
& SEC_CODE
) == 0)
2629 goto do_ifunc_pointer
;
2630 goto bad_ifunc_reloc
;
2633 /* STT_GNU_IFUNC symbol must go through PLT. */
2634 if (htab
->elf
.splt
!= NULL
)
2636 if (htab
->plt_second
!= NULL
)
2638 resolved_plt
= htab
->plt_second
;
2639 plt_offset
= eh
->plt_second
.offset
;
2643 resolved_plt
= htab
->elf
.splt
;
2644 plt_offset
= h
->plt
.offset
;
2649 resolved_plt
= htab
->elf
.iplt
;
2650 plt_offset
= h
->plt
.offset
;
2653 relocation
= (resolved_plt
->output_section
->vma
2654 + resolved_plt
->output_offset
+ plt_offset
);
2660 if (h
->root
.root
.string
)
2661 name
= h
->root
.root
.string
;
2663 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2666 /* xgettext:c-format */
2667 (_("%pB: relocation %s against STT_GNU_IFUNC "
2668 "symbol `%s' isn't supported"), input_bfd
,
2670 bfd_set_error (bfd_error_bad_value
);
2674 if (bfd_link_pic (info
))
2679 if (ABI_64_P (output_bfd
))
2684 if (rel
->r_addend
!= 0)
2686 if (h
->root
.root
.string
)
2687 name
= h
->root
.root
.string
;
2689 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
2692 /* xgettext:c-format */
2693 (_("%pB: relocation %s against STT_GNU_IFUNC "
2694 "symbol `%s' has non-zero addend: %" PRId64
),
2695 input_bfd
, howto
->name
, name
, (int64_t) rel
->r_addend
);
2696 bfd_set_error (bfd_error_bad_value
);
2700 /* Generate dynamic relcoation only when there is a
2701 non-GOT reference in a shared object or there is no
2703 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2704 || h
->plt
.offset
== (bfd_vma
) -1)
2706 Elf_Internal_Rela outrel
;
2709 /* Need a dynamic relocation to get the real function
2711 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2715 if (outrel
.r_offset
== (bfd_vma
) -1
2716 || outrel
.r_offset
== (bfd_vma
) -2)
2719 outrel
.r_offset
+= (input_section
->output_section
->vma
2720 + input_section
->output_offset
);
2722 if (POINTER_LOCAL_IFUNC_P (info
, h
))
2724 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
2725 h
->root
.root
.string
,
2726 h
->root
.u
.def
.section
->owner
);
2728 /* This symbol is resolved locally. */
2729 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
2730 outrel
.r_addend
= (h
->root
.u
.def
.value
2731 + h
->root
.u
.def
.section
->output_section
->vma
2732 + h
->root
.u
.def
.section
->output_offset
);
2736 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
2737 outrel
.r_addend
= 0;
2740 /* Dynamic relocations are stored in
2741 1. .rela.ifunc section in PIC object.
2742 2. .rela.got section in dynamic executable.
2743 3. .rela.iplt section in static executable. */
2744 if (bfd_link_pic (info
))
2745 sreloc
= htab
->elf
.irelifunc
;
2746 else if (htab
->elf
.splt
!= NULL
)
2747 sreloc
= htab
->elf
.srelgot
;
2749 sreloc
= htab
->elf
.irelplt
;
2750 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2752 /* If this reloc is against an external symbol, we
2753 do not want to fiddle with the addend. Otherwise,
2754 we need to include the symbol value so that it
2755 becomes an addend for the dynamic reloc. For an
2756 internal symbol, we have updated addend. */
2761 case R_X86_64_PC32_BND
:
2763 case R_X86_64_PLT32
:
2764 case R_X86_64_PLT32_BND
:
2770 resolved_to_zero
= (eh
!= NULL
2771 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
2773 /* When generating a shared object, the relocations handled here are
2774 copied into the output file to be resolved at run time. */
2777 case R_X86_64_GOT32
:
2778 case R_X86_64_GOT64
:
2779 /* Relocation is to the entry for this symbol in the global
2781 case R_X86_64_GOTPCREL
:
2782 case R_X86_64_GOTPCRELX
:
2783 case R_X86_64_REX_GOTPCRELX
:
2784 case R_X86_64_GOTPCREL64
:
2785 /* Use global offset table entry as symbol value. */
2786 case R_X86_64_GOTPLT64
:
2787 /* This is obsolete and treated the same as GOT64. */
2788 base_got
= htab
->elf
.sgot
;
2790 if (htab
->elf
.sgot
== NULL
)
2793 relative_reloc
= FALSE
;
2796 off
= h
->got
.offset
;
2798 && h
->plt
.offset
!= (bfd_vma
)-1
2799 && off
== (bfd_vma
)-1)
2801 /* We can't use h->got.offset here to save
2802 state, or even just remember the offset, as
2803 finish_dynamic_symbol would use that as offset into
2805 bfd_vma plt_index
= (h
->plt
.offset
/ plt_entry_size
2806 - htab
->plt
.has_plt0
);
2807 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2808 base_got
= htab
->elf
.sgotplt
;
2811 if (RESOLVED_LOCALLY_P (info
, h
, htab
))
2813 /* We must initialize this entry in the global offset
2814 table. Since the offset must always be a multiple
2815 of 8, we use the least significant bit to record
2816 whether we have initialized it already.
2818 When doing a dynamic link, we create a .rela.got
2819 relocation entry to initialize the value. This is
2820 done in the finish_dynamic_symbol routine. */
2825 bfd_put_64 (output_bfd
, relocation
,
2826 base_got
->contents
+ off
);
2827 /* Note that this is harmless for the GOTPLT64 case,
2828 as -1 | 1 still is -1. */
2831 if (GENERATE_RELATIVE_RELOC_P (info
, h
))
2833 /* If this symbol isn't dynamic in PIC,
2834 generate R_X86_64_RELATIVE here. */
2835 eh
->no_finish_dynamic_symbol
= 1;
2836 relative_reloc
= TRUE
;
2841 unresolved_reloc
= FALSE
;
2845 if (local_got_offsets
== NULL
)
2848 off
= local_got_offsets
[r_symndx
];
2850 /* The offset must always be a multiple of 8. We use
2851 the least significant bit to record whether we have
2852 already generated the necessary reloc. */
2857 bfd_put_64 (output_bfd
, relocation
,
2858 base_got
->contents
+ off
);
2859 local_got_offsets
[r_symndx
] |= 1;
2861 if (bfd_link_pic (info
))
2862 relative_reloc
= TRUE
;
2869 Elf_Internal_Rela outrel
;
2871 /* We need to generate a R_X86_64_RELATIVE reloc
2872 for the dynamic linker. */
2873 s
= htab
->elf
.srelgot
;
2877 outrel
.r_offset
= (base_got
->output_section
->vma
2878 + base_got
->output_offset
2880 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
2881 outrel
.r_addend
= relocation
;
2882 elf_append_rela (output_bfd
, s
, &outrel
);
2885 if (off
>= (bfd_vma
) -2)
2888 relocation
= base_got
->output_section
->vma
2889 + base_got
->output_offset
+ off
;
2890 if (r_type
!= R_X86_64_GOTPCREL
2891 && r_type
!= R_X86_64_GOTPCRELX
2892 && r_type
!= R_X86_64_REX_GOTPCRELX
2893 && r_type
!= R_X86_64_GOTPCREL64
)
2894 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2895 - htab
->elf
.sgotplt
->output_offset
;
2899 case R_X86_64_GOTOFF64
:
2900 /* Relocation is relative to the start of the global offset
2903 /* Check to make sure it isn't a protected function or data
2904 symbol for shared library since it may not be local when
2905 used as function address or with copy relocation. We also
2906 need to make sure that a symbol is referenced locally. */
2907 if (bfd_link_pic (info
) && h
)
2909 if (!h
->def_regular
)
2913 switch (ELF_ST_VISIBILITY (h
->other
))
2916 v
= _("hidden symbol");
2919 v
= _("internal symbol");
2922 v
= _("protected symbol");
2930 /* xgettext:c-format */
2931 (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s"
2932 " `%s' can not be used when making a shared object"),
2933 input_bfd
, v
, h
->root
.root
.string
);
2934 bfd_set_error (bfd_error_bad_value
);
2937 else if (!bfd_link_executable (info
)
2938 && !SYMBOL_REFERENCES_LOCAL_P (info
, h
)
2939 && (h
->type
== STT_FUNC
2940 || h
->type
== STT_OBJECT
)
2941 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2944 /* xgettext:c-format */
2945 (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s"
2946 " `%s' can not be used when making a shared object"),
2948 h
->type
== STT_FUNC
? "function" : "data",
2949 h
->root
.root
.string
);
2950 bfd_set_error (bfd_error_bad_value
);
2955 /* Note that sgot is not involved in this
2956 calculation. We always want the start of .got.plt. If we
2957 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2958 permitted by the ABI, we might have to change this
2960 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2961 + htab
->elf
.sgotplt
->output_offset
;
2964 case R_X86_64_GOTPC32
:
2965 case R_X86_64_GOTPC64
:
2966 /* Use global offset table as symbol value. */
2967 relocation
= htab
->elf
.sgotplt
->output_section
->vma
2968 + htab
->elf
.sgotplt
->output_offset
;
2969 unresolved_reloc
= FALSE
;
2972 case R_X86_64_PLTOFF64
:
2973 /* Relocation is PLT entry relative to GOT. For local
2974 symbols it's the symbol itself relative to GOT. */
2976 /* See PLT32 handling. */
2977 && (h
->plt
.offset
!= (bfd_vma
) -1
2978 || eh
->plt_got
.offset
!= (bfd_vma
) -1)
2979 && htab
->elf
.splt
!= NULL
)
2981 if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
2983 /* Use the GOT PLT. */
2984 resolved_plt
= htab
->plt_got
;
2985 plt_offset
= eh
->plt_got
.offset
;
2987 else if (htab
->plt_second
!= NULL
)
2989 resolved_plt
= htab
->plt_second
;
2990 plt_offset
= eh
->plt_second
.offset
;
2994 resolved_plt
= htab
->elf
.splt
;
2995 plt_offset
= h
->plt
.offset
;
2998 relocation
= (resolved_plt
->output_section
->vma
2999 + resolved_plt
->output_offset
3001 unresolved_reloc
= FALSE
;
3004 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3005 + htab
->elf
.sgotplt
->output_offset
;
3008 case R_X86_64_PLT32
:
3009 case R_X86_64_PLT32_BND
:
3010 /* Relocation is to the entry for this symbol in the
3011 procedure linkage table. */
3013 /* Resolve a PLT32 reloc against a local symbol directly,
3014 without using the procedure linkage table. */
3018 if ((h
->plt
.offset
== (bfd_vma
) -1
3019 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3020 || htab
->elf
.splt
== NULL
)
3022 /* We didn't make a PLT entry for this symbol. This
3023 happens when statically linking PIC code, or when
3024 using -Bsymbolic. */
3029 if (h
->plt
.offset
!= (bfd_vma
) -1)
3031 if (htab
->plt_second
!= NULL
)
3033 resolved_plt
= htab
->plt_second
;
3034 plt_offset
= eh
->plt_second
.offset
;
3038 resolved_plt
= htab
->elf
.splt
;
3039 plt_offset
= h
->plt
.offset
;
3044 /* Use the GOT PLT. */
3045 resolved_plt
= htab
->plt_got
;
3046 plt_offset
= eh
->plt_got
.offset
;
3049 relocation
= (resolved_plt
->output_section
->vma
3050 + resolved_plt
->output_offset
3052 unresolved_reloc
= FALSE
;
3055 case R_X86_64_SIZE32
:
3056 case R_X86_64_SIZE64
:
3057 /* Set to symbol size. */
3058 relocation
= st_size
;
3064 case R_X86_64_PC32_BND
:
3065 /* Don't complain about -fPIC if the symbol is undefined when
3066 building executable unless it is unresolved weak symbol,
3067 references a dynamic definition in PIE or -z nocopyreloc
3069 if ((input_section
->flags
& SEC_ALLOC
) != 0
3070 && (input_section
->flags
& SEC_READONLY
) != 0
3072 && ((bfd_link_executable (info
)
3073 && ((h
->root
.type
== bfd_link_hash_undefweak
3074 && !resolved_to_zero
)
3075 || (bfd_link_pie (info
)
3078 || ((info
->nocopyreloc
3079 || (eh
->def_protected
3080 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
3082 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))))
3083 || bfd_link_dll (info
)))
3085 bfd_boolean fail
= FALSE
;
3086 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3088 /* Symbol is referenced locally. Make sure it is
3090 fail
= !(h
->def_regular
|| ELF_COMMON_DEF_P (h
));
3092 else if (!(bfd_link_pie (info
)
3093 && (h
->needs_copy
|| eh
->needs_copy
)))
3095 /* Symbol doesn't need copy reloc and isn't referenced
3096 locally. Address of protected function may not be
3097 reachable at run-time. */
3098 fail
= (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3099 || (ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
3100 && h
->type
== STT_FUNC
));
3104 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3105 h
, NULL
, NULL
, howto
);
3107 /* Since x86-64 has PC-relative PLT, we can use PLT in PIE
3108 as function address. */
3110 && (input_section
->flags
& SEC_CODE
) == 0
3111 && bfd_link_pie (info
)
3112 && h
->type
== STT_FUNC
3123 /* FIXME: The ABI says the linker should make sure the value is
3124 the same when it's zeroextended to 64 bit. */
3127 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3130 need_copy_reloc_in_pie
= (bfd_link_pie (info
)
3135 == bfd_link_hash_undefined
))
3136 && (X86_PCREL_TYPE_P (r_type
)
3137 || X86_SIZE_TYPE_P (r_type
)));
3139 if (GENERATE_DYNAMIC_RELOCATION_P (info
, eh
, r_type
,
3140 need_copy_reloc_in_pie
,
3141 resolved_to_zero
, FALSE
))
3143 Elf_Internal_Rela outrel
;
3144 bfd_boolean skip
, relocate
;
3147 /* When generating a shared object, these relocations
3148 are copied into the output file to be resolved at run
3154 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3156 if (outrel
.r_offset
== (bfd_vma
) -1)
3158 else if (outrel
.r_offset
== (bfd_vma
) -2)
3159 skip
= TRUE
, relocate
= TRUE
;
3161 outrel
.r_offset
+= (input_section
->output_section
->vma
3162 + input_section
->output_offset
);
3165 memset (&outrel
, 0, sizeof outrel
);
3167 else if (COPY_INPUT_RELOC_P (info
, h
, r_type
))
3169 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3170 outrel
.r_addend
= rel
->r_addend
;
3174 /* This symbol is local, or marked to become local.
3175 When relocation overflow check is disabled, we
3176 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
3177 if (r_type
== htab
->pointer_r_type
3178 || (r_type
== R_X86_64_32
3179 && info
->no_reloc_overflow_check
))
3182 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3183 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3185 else if (r_type
== R_X86_64_64
3186 && !ABI_64_P (output_bfd
))
3189 outrel
.r_info
= htab
->r_info (0,
3190 R_X86_64_RELATIVE64
);
3191 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3192 /* Check addend overflow. */
3193 if ((outrel
.r_addend
& 0x80000000)
3194 != (rel
->r_addend
& 0x80000000))
3197 int addend
= rel
->r_addend
;
3198 if (h
&& h
->root
.root
.string
)
3199 name
= h
->root
.root
.string
;
3201 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3204 /* xgettext:c-format */
3205 (_("%pB: addend %s%#x in relocation %s against "
3206 "symbol `%s' at %#" PRIx64
3207 " in section `%pA' is out of range"),
3208 input_bfd
, addend
< 0 ? "-" : "", addend
,
3209 howto
->name
, name
, (uint64_t) rel
->r_offset
,
3211 bfd_set_error (bfd_error_bad_value
);
3219 if (bfd_is_abs_section (sec
))
3221 else if (sec
== NULL
|| sec
->owner
== NULL
)
3223 bfd_set_error (bfd_error_bad_value
);
3230 /* We are turning this relocation into one
3231 against a section symbol. It would be
3232 proper to subtract the symbol's value,
3233 osec->vma, from the emitted reloc addend,
3234 but ld.so expects buggy relocs. */
3235 osec
= sec
->output_section
;
3236 sindx
= elf_section_data (osec
)->dynindx
;
3239 asection
*oi
= htab
->elf
.text_index_section
;
3240 sindx
= elf_section_data (oi
)->dynindx
;
3242 BFD_ASSERT (sindx
!= 0);
3245 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3246 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3250 sreloc
= elf_section_data (input_section
)->sreloc
;
3252 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3254 r
= bfd_reloc_notsupported
;
3255 goto check_relocation_error
;
3258 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3260 /* If this reloc is against an external symbol, we do
3261 not want to fiddle with the addend. Otherwise, we
3262 need to include the symbol value so that it becomes
3263 an addend for the dynamic reloc. */
3270 case R_X86_64_TLSGD
:
3271 case R_X86_64_GOTPC32_TLSDESC
:
3272 case R_X86_64_TLSDESC_CALL
:
3273 case R_X86_64_GOTTPOFF
:
3274 tls_type
= GOT_UNKNOWN
;
3275 if (h
== NULL
&& local_got_offsets
)
3276 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
3278 tls_type
= elf_x86_hash_entry (h
)->tls_type
;
3280 r_type_tls
= r_type
;
3281 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3282 input_section
, contents
,
3283 symtab_hdr
, sym_hashes
,
3284 &r_type_tls
, tls_type
, rel
,
3285 relend
, h
, r_symndx
, TRUE
))
3288 if (r_type_tls
== R_X86_64_TPOFF32
)
3290 bfd_vma roff
= rel
->r_offset
;
3292 BFD_ASSERT (! unresolved_reloc
);
3294 if (r_type
== R_X86_64_TLSGD
)
3296 /* GD->LE transition. For 64bit, change
3297 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3298 .word 0x6666; rex64; call __tls_get_addr@PLT
3300 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3302 call *__tls_get_addr@GOTPCREL(%rip)
3303 which may be converted to
3304 addr32 call __tls_get_addr
3307 leaq foo@tpoff(%rax), %rax
3309 leaq foo@tlsgd(%rip), %rdi
3310 .word 0x6666; rex64; call __tls_get_addr@PLT
3312 leaq foo@tlsgd(%rip), %rdi
3314 call *__tls_get_addr@GOTPCREL(%rip)
3315 which may be converted to
3316 addr32 call __tls_get_addr
3319 leaq foo@tpoff(%rax), %rax
3320 For largepic, change:
3321 leaq foo@tlsgd(%rip), %rdi
3322 movabsq $__tls_get_addr@pltoff, %rax
3327 leaq foo@tpoff(%rax), %rax
3328 nopw 0x0(%rax,%rax,1) */
3330 if (ABI_64_P (output_bfd
))
3332 if (contents
[roff
+ 5] == 0xb8)
3334 memcpy (contents
+ roff
- 3,
3335 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
3336 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3340 memcpy (contents
+ roff
- 4,
3341 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3345 memcpy (contents
+ roff
- 3,
3346 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3348 bfd_put_32 (output_bfd
,
3349 elf_x86_64_tpoff (info
, relocation
),
3350 contents
+ roff
+ 8 + largepic
);
3351 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
3352 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
3357 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3359 /* GDesc -> LE transition.
3360 It's originally something like:
3361 leaq x@tlsdesc(%rip), %rax
3364 movl $x@tpoff, %rax. */
3366 unsigned int val
, type
;
3368 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3369 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3370 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
3371 contents
+ roff
- 3);
3372 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
3373 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3374 contents
+ roff
- 1);
3375 bfd_put_32 (output_bfd
,
3376 elf_x86_64_tpoff (info
, relocation
),
3380 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3382 /* GDesc -> LE transition.
3387 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3388 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3391 else if (r_type
== R_X86_64_GOTTPOFF
)
3393 /* IE->LE transition:
3394 For 64bit, originally it can be one of:
3395 movq foo@gottpoff(%rip), %reg
3396 addq foo@gottpoff(%rip), %reg
3399 leaq foo(%reg), %reg
3401 For 32bit, originally it can be one of:
3402 movq foo@gottpoff(%rip), %reg
3403 addl foo@gottpoff(%rip), %reg
3406 leal foo(%reg), %reg
3409 unsigned int val
, type
, reg
;
3412 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3415 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3416 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3422 bfd_put_8 (output_bfd
, 0x49,
3423 contents
+ roff
- 3);
3424 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3425 bfd_put_8 (output_bfd
, 0x41,
3426 contents
+ roff
- 3);
3427 bfd_put_8 (output_bfd
, 0xc7,
3428 contents
+ roff
- 2);
3429 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3430 contents
+ roff
- 1);
3434 /* addq/addl -> addq/addl - addressing with %rsp/%r12
3437 bfd_put_8 (output_bfd
, 0x49,
3438 contents
+ roff
- 3);
3439 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3440 bfd_put_8 (output_bfd
, 0x41,
3441 contents
+ roff
- 3);
3442 bfd_put_8 (output_bfd
, 0x81,
3443 contents
+ roff
- 2);
3444 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3445 contents
+ roff
- 1);
3449 /* addq/addl -> leaq/leal */
3451 bfd_put_8 (output_bfd
, 0x4d,
3452 contents
+ roff
- 3);
3453 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3454 bfd_put_8 (output_bfd
, 0x45,
3455 contents
+ roff
- 3);
3456 bfd_put_8 (output_bfd
, 0x8d,
3457 contents
+ roff
- 2);
3458 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
3459 contents
+ roff
- 1);
3461 bfd_put_32 (output_bfd
,
3462 elf_x86_64_tpoff (info
, relocation
),
3470 if (htab
->elf
.sgot
== NULL
)
3475 off
= h
->got
.offset
;
3476 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
3480 if (local_got_offsets
== NULL
)
3483 off
= local_got_offsets
[r_symndx
];
3484 offplt
= local_tlsdesc_gotents
[r_symndx
];
3491 Elf_Internal_Rela outrel
;
3495 if (htab
->elf
.srelgot
== NULL
)
3498 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3500 if (GOT_TLS_GDESC_P (tls_type
))
3502 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
3503 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
3504 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
3505 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3506 + htab
->elf
.sgotplt
->output_offset
3508 + htab
->sgotplt_jump_table_size
);
3509 sreloc
= htab
->elf
.srelplt
;
3511 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3513 outrel
.r_addend
= 0;
3514 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3517 sreloc
= htab
->elf
.srelgot
;
3519 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3520 + htab
->elf
.sgot
->output_offset
+ off
);
3522 if (GOT_TLS_GD_P (tls_type
))
3523 dr_type
= R_X86_64_DTPMOD64
;
3524 else if (GOT_TLS_GDESC_P (tls_type
))
3527 dr_type
= R_X86_64_TPOFF64
;
3529 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
3530 outrel
.r_addend
= 0;
3531 if ((dr_type
== R_X86_64_TPOFF64
3532 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
3533 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3534 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
3536 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3538 if (GOT_TLS_GD_P (tls_type
))
3542 BFD_ASSERT (! unresolved_reloc
);
3543 bfd_put_64 (output_bfd
,
3544 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3545 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3549 bfd_put_64 (output_bfd
, 0,
3550 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3551 outrel
.r_info
= htab
->r_info (indx
,
3553 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
3554 elf_append_rela (output_bfd
, sreloc
,
3563 local_got_offsets
[r_symndx
] |= 1;
3566 if (off
>= (bfd_vma
) -2
3567 && ! GOT_TLS_GDESC_P (tls_type
))
3569 if (r_type_tls
== r_type
)
3571 if (r_type
== R_X86_64_GOTPC32_TLSDESC
3572 || r_type
== R_X86_64_TLSDESC_CALL
)
3573 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3574 + htab
->elf
.sgotplt
->output_offset
3575 + offplt
+ htab
->sgotplt_jump_table_size
;
3577 relocation
= htab
->elf
.sgot
->output_section
->vma
3578 + htab
->elf
.sgot
->output_offset
+ off
;
3579 unresolved_reloc
= FALSE
;
3583 bfd_vma roff
= rel
->r_offset
;
3585 if (r_type
== R_X86_64_TLSGD
)
3587 /* GD->IE transition. For 64bit, change
3588 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3589 .word 0x6666; rex64; call __tls_get_addr@PLT
3591 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3593 call *__tls_get_addr@GOTPCREL(%rip
3594 which may be converted to
3595 addr32 call __tls_get_addr
3598 addq foo@gottpoff(%rip), %rax
3600 leaq foo@tlsgd(%rip), %rdi
3601 .word 0x6666; rex64; call __tls_get_addr@PLT
3603 leaq foo@tlsgd(%rip), %rdi
3605 call *__tls_get_addr@GOTPCREL(%rip)
3606 which may be converted to
3607 addr32 call __tls_get_addr
3610 addq foo@gottpoff(%rip), %rax
3611 For largepic, change:
3612 leaq foo@tlsgd(%rip), %rdi
3613 movabsq $__tls_get_addr@pltoff, %rax
3618 addq foo@gottpoff(%rax), %rax
3619 nopw 0x0(%rax,%rax,1) */
3621 if (ABI_64_P (output_bfd
))
3623 if (contents
[roff
+ 5] == 0xb8)
3625 memcpy (contents
+ roff
- 3,
3626 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
3627 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3631 memcpy (contents
+ roff
- 4,
3632 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3636 memcpy (contents
+ roff
- 3,
3637 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3640 relocation
= (htab
->elf
.sgot
->output_section
->vma
3641 + htab
->elf
.sgot
->output_offset
+ off
3644 - input_section
->output_section
->vma
3645 - input_section
->output_offset
3647 bfd_put_32 (output_bfd
, relocation
,
3648 contents
+ roff
+ 8 + largepic
);
3649 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
3654 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3656 /* GDesc -> IE transition.
3657 It's originally something like:
3658 leaq x@tlsdesc(%rip), %rax
3661 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
3663 /* Now modify the instruction as appropriate. To
3664 turn a leaq into a movq in the form we use it, it
3665 suffices to change the second byte from 0x8d to
3667 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3669 bfd_put_32 (output_bfd
,
3670 htab
->elf
.sgot
->output_section
->vma
3671 + htab
->elf
.sgot
->output_offset
+ off
3673 - input_section
->output_section
->vma
3674 - input_section
->output_offset
3679 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3681 /* GDesc -> IE transition.
3688 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3689 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3697 case R_X86_64_TLSLD
:
3698 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3699 input_section
, contents
,
3700 symtab_hdr
, sym_hashes
,
3701 &r_type
, GOT_UNKNOWN
, rel
,
3702 relend
, h
, r_symndx
, TRUE
))
3705 if (r_type
!= R_X86_64_TLSLD
)
3707 /* LD->LE transition:
3708 leaq foo@tlsld(%rip), %rdi
3709 call __tls_get_addr@PLT
3710 For 64bit, we change it into:
3711 .word 0x6666; .byte 0x66; movq %fs:0, %rax
3712 For 32bit, we change it into:
3713 nopl 0x0(%rax); movl %fs:0, %eax
3715 leaq foo@tlsld(%rip), %rdi;
3716 call *__tls_get_addr@GOTPCREL(%rip)
3717 which may be converted to
3718 addr32 call __tls_get_addr
3719 For 64bit, we change it into:
3720 .word 0x6666; .word 0x6666; movq %fs:0, %rax
3721 For 32bit, we change it into:
3722 nopw 0x0(%rax); movl %fs:0, %eax
3723 For largepic, change:
3724 leaq foo@tlsgd(%rip), %rdi
3725 movabsq $__tls_get_addr@pltoff, %rax
3729 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
3732 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
3733 if (ABI_64_P (output_bfd
))
3735 if (contents
[rel
->r_offset
+ 5] == 0xb8)
3736 memcpy (contents
+ rel
->r_offset
- 3,
3737 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
3738 "\x64\x48\x8b\x04\x25\0\0\0", 22);
3739 else if (contents
[rel
->r_offset
+ 4] == 0xff
3740 || contents
[rel
->r_offset
+ 4] == 0x67)
3741 memcpy (contents
+ rel
->r_offset
- 3,
3742 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
3745 memcpy (contents
+ rel
->r_offset
- 3,
3746 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3750 if (contents
[rel
->r_offset
+ 4] == 0xff)
3751 memcpy (contents
+ rel
->r_offset
- 3,
3752 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
3755 memcpy (contents
+ rel
->r_offset
- 3,
3756 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
3758 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
3759 and R_X86_64_PLTOFF64. */
3765 if (htab
->elf
.sgot
== NULL
)
3768 off
= htab
->tls_ld_or_ldm_got
.offset
;
3773 Elf_Internal_Rela outrel
;
3775 if (htab
->elf
.srelgot
== NULL
)
3778 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3779 + htab
->elf
.sgot
->output_offset
+ off
);
3781 bfd_put_64 (output_bfd
, 0,
3782 htab
->elf
.sgot
->contents
+ off
);
3783 bfd_put_64 (output_bfd
, 0,
3784 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3785 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
3786 outrel
.r_addend
= 0;
3787 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
3789 htab
->tls_ld_or_ldm_got
.offset
|= 1;
3791 relocation
= htab
->elf
.sgot
->output_section
->vma
3792 + htab
->elf
.sgot
->output_offset
+ off
;
3793 unresolved_reloc
= FALSE
;
3796 case R_X86_64_DTPOFF32
:
3797 if (!bfd_link_executable (info
)
3798 || (input_section
->flags
& SEC_CODE
) == 0)
3799 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3801 relocation
= elf_x86_64_tpoff (info
, relocation
);
3804 case R_X86_64_TPOFF32
:
3805 case R_X86_64_TPOFF64
:
3806 BFD_ASSERT (bfd_link_executable (info
));
3807 relocation
= elf_x86_64_tpoff (info
, relocation
);
3810 case R_X86_64_DTPOFF64
:
3811 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
3812 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3819 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3820 because such sections are not SEC_ALLOC and thus ld.so will
3821 not process them. */
3822 if (unresolved_reloc
3823 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3825 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3826 rel
->r_offset
) != (bfd_vma
) -1)
3831 sec
= h
->root
.u
.def
.section
;
3832 if ((info
->nocopyreloc
3833 || (eh
->def_protected
3834 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
3835 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))
3836 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3837 h
, NULL
, NULL
, howto
);
3842 /* xgettext:c-format */
3843 (_("%pB(%pA+%#" PRIx64
"): "
3844 "unresolvable %s relocation against symbol `%s'"),
3847 (uint64_t) rel
->r_offset
,
3849 h
->root
.root
.string
);
3855 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3856 contents
, rel
->r_offset
,
3857 relocation
, rel
->r_addend
);
3859 check_relocation_error
:
3860 if (r
!= bfd_reloc_ok
)
3865 name
= h
->root
.root
.string
;
3868 name
= bfd_elf_string_from_elf_section (input_bfd
,
3869 symtab_hdr
->sh_link
,
3874 name
= bfd_section_name (input_bfd
, sec
);
3877 if (r
== bfd_reloc_overflow
)
3879 if (converted_reloc
)
3881 info
->callbacks
->einfo
3882 (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n"));
3885 (*info
->callbacks
->reloc_overflow
)
3886 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3887 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3892 /* xgettext:c-format */
3893 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
3894 input_bfd
, input_section
,
3895 (uint64_t) rel
->r_offset
, name
, (int) r
);
3906 Elf_Internal_Shdr
*rel_hdr
;
3907 size_t deleted
= rel
- wrel
;
3909 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
3910 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3911 if (rel_hdr
->sh_size
== 0)
3913 /* It is too late to remove an empty reloc section. Leave
3915 ??? What is wrong with an empty section??? */
3916 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
3919 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
3920 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3921 input_section
->reloc_count
-= deleted
;
3927 /* Finish up dynamic symbol handling. We set the contents of various
3928 dynamic sections here. */
3931 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
3932 struct bfd_link_info
*info
,
3933 struct elf_link_hash_entry
*h
,
3934 Elf_Internal_Sym
*sym
)
3936 struct elf_x86_link_hash_table
*htab
;
3937 bfd_boolean use_plt_second
;
3938 struct elf_x86_link_hash_entry
*eh
;
3939 bfd_boolean local_undefweak
;
3941 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
3945 /* Use the second PLT section only if there is .plt section. */
3946 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
3948 eh
= (struct elf_x86_link_hash_entry
*) h
;
3949 if (eh
->no_finish_dynamic_symbol
)
3952 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3953 resolved undefined weak symbols in executable so that their
3954 references have value 0 at run-time. */
3955 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
3957 if (h
->plt
.offset
!= (bfd_vma
) -1)
3960 bfd_vma got_offset
, plt_offset
;
3961 Elf_Internal_Rela rela
;
3963 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
3964 const struct elf_backend_data
*bed
;
3965 bfd_vma plt_got_pcrel_offset
;
3967 /* When building a static executable, use .iplt, .igot.plt and
3968 .rela.iplt sections for STT_GNU_IFUNC symbols. */
3969 if (htab
->elf
.splt
!= NULL
)
3971 plt
= htab
->elf
.splt
;
3972 gotplt
= htab
->elf
.sgotplt
;
3973 relplt
= htab
->elf
.srelplt
;
3977 plt
= htab
->elf
.iplt
;
3978 gotplt
= htab
->elf
.igotplt
;
3979 relplt
= htab
->elf
.irelplt
;
3982 VERIFY_PLT_ENTRY (info
, h
, plt
, gotplt
, relplt
, local_undefweak
)
3984 /* Get the index in the procedure linkage table which
3985 corresponds to this symbol. This is the index of this symbol
3986 in all the symbols for which we are making plt entries. The
3987 first entry in the procedure linkage table is reserved.
3989 Get the offset into the .got table of the entry that
3990 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
3991 bytes. The first three are reserved for the dynamic linker.
3993 For static executables, we don't reserve anything. */
3995 if (plt
== htab
->elf
.splt
)
3997 got_offset
= (h
->plt
.offset
/ htab
->plt
.plt_entry_size
3998 - htab
->plt
.has_plt0
);
3999 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4003 got_offset
= h
->plt
.offset
/ htab
->plt
.plt_entry_size
;
4004 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4007 /* Fill in the entry in the procedure linkage table. */
4008 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
4009 htab
->plt
.plt_entry_size
);
4012 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
4013 htab
->non_lazy_plt
->plt_entry
,
4014 htab
->non_lazy_plt
->plt_entry_size
);
4016 resolved_plt
= htab
->plt_second
;
4017 plt_offset
= eh
->plt_second
.offset
;
4022 plt_offset
= h
->plt
.offset
;
4025 /* Insert the relocation positions of the plt section. */
4027 /* Put offset the PC-relative instruction referring to the GOT entry,
4028 subtracting the size of that instruction. */
4029 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
4030 + gotplt
->output_offset
4032 - resolved_plt
->output_section
->vma
4033 - resolved_plt
->output_offset
4035 - htab
->plt
.plt_got_insn_size
);
4037 /* Check PC-relative offset overflow in PLT entry. */
4038 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
4039 /* xgettext:c-format */
4040 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"),
4041 output_bfd
, h
->root
.root
.string
);
4043 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
4044 (resolved_plt
->contents
+ plt_offset
4045 + htab
->plt
.plt_got_offset
));
4047 /* Fill in the entry in the global offset table, initially this
4048 points to the second part of the PLT entry. Leave the entry
4049 as zero for undefined weak symbol in PIE. No PLT relocation
4050 against undefined weak symbol in PIE. */
4051 if (!local_undefweak
)
4053 if (htab
->plt
.has_plt0
)
4054 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4055 + plt
->output_offset
4057 + htab
->lazy_plt
->plt_lazy_offset
),
4058 gotplt
->contents
+ got_offset
);
4060 /* Fill in the entry in the .rela.plt section. */
4061 rela
.r_offset
= (gotplt
->output_section
->vma
4062 + gotplt
->output_offset
4064 if (PLT_LOCAL_IFUNC_P (info
, h
))
4066 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4067 h
->root
.root
.string
,
4068 h
->root
.u
.def
.section
->owner
);
4070 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4071 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4072 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4073 rela
.r_addend
= (h
->root
.u
.def
.value
4074 + h
->root
.u
.def
.section
->output_section
->vma
4075 + h
->root
.u
.def
.section
->output_offset
);
4076 /* R_X86_64_IRELATIVE comes last. */
4077 plt_index
= htab
->next_irelative_index
--;
4081 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4083 plt_index
= htab
->next_jump_slot_index
++;
4086 /* Don't fill the second and third slots in PLT entry for
4087 static executables nor without PLT0. */
4088 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
4091 = h
->plt
.offset
+ htab
->lazy_plt
->plt_plt_insn_end
;
4093 /* Put relocation index. */
4094 bfd_put_32 (output_bfd
, plt_index
,
4095 (plt
->contents
+ h
->plt
.offset
4096 + htab
->lazy_plt
->plt_reloc_offset
));
4098 /* Put offset for jmp .PLT0 and check for overflow. We don't
4099 check relocation index for overflow since branch displacement
4100 will overflow first. */
4101 if (plt0_offset
> 0x80000000)
4102 /* xgettext:c-format */
4103 info
->callbacks
->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"),
4104 output_bfd
, h
->root
.root
.string
);
4105 bfd_put_32 (output_bfd
, - plt0_offset
,
4106 (plt
->contents
+ h
->plt
.offset
4107 + htab
->lazy_plt
->plt_plt_offset
));
4110 bed
= get_elf_backend_data (output_bfd
);
4111 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4112 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4115 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4117 bfd_vma got_offset
, plt_offset
;
4118 asection
*plt
, *got
;
4119 bfd_boolean got_after_plt
;
4120 int32_t got_pcrel_offset
;
4122 /* Set the entry in the GOT procedure linkage table. */
4123 plt
= htab
->plt_got
;
4124 got
= htab
->elf
.sgot
;
4125 got_offset
= h
->got
.offset
;
4127 if (got_offset
== (bfd_vma
) -1
4128 || (h
->type
== STT_GNU_IFUNC
&& h
->def_regular
)
4133 /* Use the non-lazy PLT entry template for the GOT PLT since they
4134 are the identical. */
4135 /* Fill in the entry in the GOT procedure linkage table. */
4136 plt_offset
= eh
->plt_got
.offset
;
4137 memcpy (plt
->contents
+ plt_offset
,
4138 htab
->non_lazy_plt
->plt_entry
,
4139 htab
->non_lazy_plt
->plt_entry_size
);
4141 /* Put offset the PC-relative instruction referring to the GOT
4142 entry, subtracting the size of that instruction. */
4143 got_pcrel_offset
= (got
->output_section
->vma
4144 + got
->output_offset
4146 - plt
->output_section
->vma
4147 - plt
->output_offset
4149 - htab
->non_lazy_plt
->plt_got_insn_size
);
4151 /* Check PC-relative offset overflow in GOT PLT entry. */
4152 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
4153 if ((got_after_plt
&& got_pcrel_offset
< 0)
4154 || (!got_after_plt
&& got_pcrel_offset
> 0))
4155 /* xgettext:c-format */
4156 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
4157 output_bfd
, h
->root
.root
.string
);
4159 bfd_put_32 (output_bfd
, got_pcrel_offset
,
4160 (plt
->contents
+ plt_offset
4161 + htab
->non_lazy_plt
->plt_got_offset
));
4164 if (!local_undefweak
4166 && (h
->plt
.offset
!= (bfd_vma
) -1
4167 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4169 /* Mark the symbol as undefined, rather than as defined in
4170 the .plt section. Leave the value if there were any
4171 relocations where pointer equality matters (this is a clue
4172 for the dynamic linker, to make function pointer
4173 comparisons work between an application and shared
4174 library), otherwise set it to zero. If a function is only
4175 called from a binary, there is no need to slow down
4176 shared libraries because of that. */
4177 sym
->st_shndx
= SHN_UNDEF
;
4178 if (!h
->pointer_equality_needed
)
4182 _bfd_x86_elf_link_fixup_ifunc_symbol (info
, htab
, h
, sym
);
4184 /* Don't generate dynamic GOT relocation against undefined weak
4185 symbol in executable. */
4186 if (h
->got
.offset
!= (bfd_vma
) -1
4187 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h
)->tls_type
)
4188 && elf_x86_hash_entry (h
)->tls_type
!= GOT_TLS_IE
4189 && !local_undefweak
)
4191 Elf_Internal_Rela rela
;
4192 asection
*relgot
= htab
->elf
.srelgot
;
4194 /* This symbol has an entry in the global offset table. Set it
4196 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4199 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4200 + htab
->elf
.sgot
->output_offset
4201 + (h
->got
.offset
&~ (bfd_vma
) 1));
4203 /* If this is a static link, or it is a -Bsymbolic link and the
4204 symbol is defined locally or was forced to be local because
4205 of a version file, we just want to emit a RELATIVE reloc.
4206 The entry in the global offset table will already have been
4207 initialized in the relocate_section function. */
4209 && h
->type
== STT_GNU_IFUNC
)
4211 if (h
->plt
.offset
== (bfd_vma
) -1)
4213 /* STT_GNU_IFUNC is referenced without PLT. */
4214 if (htab
->elf
.splt
== NULL
)
4216 /* use .rel[a].iplt section to store .got relocations
4217 in static executable. */
4218 relgot
= htab
->elf
.irelplt
;
4220 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4222 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4223 h
->root
.root
.string
,
4224 h
->root
.u
.def
.section
->owner
);
4226 rela
.r_info
= htab
->r_info (0,
4227 R_X86_64_IRELATIVE
);
4228 rela
.r_addend
= (h
->root
.u
.def
.value
4229 + h
->root
.u
.def
.section
->output_section
->vma
4230 + h
->root
.u
.def
.section
->output_offset
);
4235 else if (bfd_link_pic (info
))
4237 /* Generate R_X86_64_GLOB_DAT. */
4245 if (!h
->pointer_equality_needed
)
4248 /* For non-shared object, we can't use .got.plt, which
4249 contains the real function addres if we need pointer
4250 equality. We load the GOT entry with the PLT entry. */
4251 if (htab
->plt_second
!= NULL
)
4253 plt
= htab
->plt_second
;
4254 plt_offset
= eh
->plt_second
.offset
;
4258 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4259 plt_offset
= h
->plt
.offset
;
4261 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4262 + plt
->output_offset
4264 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4268 else if (bfd_link_pic (info
)
4269 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4271 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
4273 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4274 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4275 rela
.r_addend
= (h
->root
.u
.def
.value
4276 + h
->root
.u
.def
.section
->output_section
->vma
4277 + h
->root
.u
.def
.section
->output_offset
);
4281 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4283 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4284 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4285 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4289 elf_append_rela (output_bfd
, relgot
, &rela
);
4294 Elf_Internal_Rela rela
;
4297 /* This symbol needs a copy reloc. Set it up. */
4298 VERIFY_COPY_RELOC (h
, htab
)
4300 rela
.r_offset
= (h
->root
.u
.def
.value
4301 + h
->root
.u
.def
.section
->output_section
->vma
4302 + h
->root
.u
.def
.section
->output_offset
);
4303 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4305 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
4306 s
= htab
->elf
.sreldynrelro
;
4308 s
= htab
->elf
.srelbss
;
4309 elf_append_rela (output_bfd
, s
, &rela
);
4315 /* Finish up local dynamic symbol handling. We set the contents of
4316 various dynamic sections here. */
4319 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4321 struct elf_link_hash_entry
*h
4322 = (struct elf_link_hash_entry
*) *slot
;
4323 struct bfd_link_info
*info
4324 = (struct bfd_link_info
*) inf
;
4326 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4330 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4331 here since undefined weak symbol may not be dynamic and may not be
4332 called for elf_x86_64_finish_dynamic_symbol. */
4335 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
4338 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
4339 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
4341 if (h
->root
.type
!= bfd_link_hash_undefweak
4342 || h
->dynindx
!= -1)
4345 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4349 /* Used to decide how to sort relocs in an optimal manner for the
4350 dynamic linker, before writing them out. */
4352 static enum elf_reloc_type_class
4353 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info
,
4354 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4355 const Elf_Internal_Rela
*rela
)
4357 bfd
*abfd
= info
->output_bfd
;
4358 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4359 struct elf_x86_link_hash_table
*htab
4360 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4362 if (htab
->elf
.dynsym
!= NULL
4363 && htab
->elf
.dynsym
->contents
!= NULL
)
4365 /* Check relocation against STT_GNU_IFUNC symbol if there are
4367 unsigned long r_symndx
= htab
->r_sym (rela
->r_info
);
4368 if (r_symndx
!= STN_UNDEF
)
4370 Elf_Internal_Sym sym
;
4371 if (!bed
->s
->swap_symbol_in (abfd
,
4372 (htab
->elf
.dynsym
->contents
4373 + r_symndx
* bed
->s
->sizeof_sym
),
4377 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
4378 return reloc_class_ifunc
;
4382 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4384 case R_X86_64_IRELATIVE
:
4385 return reloc_class_ifunc
;
4386 case R_X86_64_RELATIVE
:
4387 case R_X86_64_RELATIVE64
:
4388 return reloc_class_relative
;
4389 case R_X86_64_JUMP_SLOT
:
4390 return reloc_class_plt
;
4392 return reloc_class_copy
;
4394 return reloc_class_normal
;
4398 /* Finish up the dynamic sections. */
4401 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4402 struct bfd_link_info
*info
)
4404 struct elf_x86_link_hash_table
*htab
;
4406 htab
= _bfd_x86_elf_finish_dynamic_sections (output_bfd
, info
);
4410 if (! htab
->elf
.dynamic_sections_created
)
4413 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4415 elf_section_data (htab
->elf
.splt
->output_section
)
4416 ->this_hdr
.sh_entsize
= htab
->plt
.plt_entry_size
;
4418 if (htab
->plt
.has_plt0
)
4420 /* Fill in the special first entry in the procedure linkage
4422 memcpy (htab
->elf
.splt
->contents
,
4423 htab
->lazy_plt
->plt0_entry
,
4424 htab
->lazy_plt
->plt0_entry_size
);
4425 /* Add offset for pushq GOT+8(%rip), since the instruction
4426 uses 6 bytes subtract this value. */
4427 bfd_put_32 (output_bfd
,
4428 (htab
->elf
.sgotplt
->output_section
->vma
4429 + htab
->elf
.sgotplt
->output_offset
4431 - htab
->elf
.splt
->output_section
->vma
4432 - htab
->elf
.splt
->output_offset
4434 (htab
->elf
.splt
->contents
4435 + htab
->lazy_plt
->plt0_got1_offset
));
4436 /* Add offset for the PC-relative instruction accessing
4437 GOT+16, subtracting the offset to the end of that
4439 bfd_put_32 (output_bfd
,
4440 (htab
->elf
.sgotplt
->output_section
->vma
4441 + htab
->elf
.sgotplt
->output_offset
4443 - htab
->elf
.splt
->output_section
->vma
4444 - htab
->elf
.splt
->output_offset
4445 - htab
->lazy_plt
->plt0_got2_insn_end
),
4446 (htab
->elf
.splt
->contents
4447 + htab
->lazy_plt
->plt0_got2_offset
));
4450 if (htab
->tlsdesc_plt
)
4452 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4453 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
4455 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
4456 htab
->lazy_plt
->plt_tlsdesc_entry
,
4457 htab
->lazy_plt
->plt_tlsdesc_entry_size
);
4459 /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4
4460 bytes and the instruction uses 6 bytes, subtract these
4462 bfd_put_32 (output_bfd
,
4463 (htab
->elf
.sgotplt
->output_section
->vma
4464 + htab
->elf
.sgotplt
->output_offset
4466 - htab
->elf
.splt
->output_section
->vma
4467 - htab
->elf
.splt
->output_offset
4469 - htab
->lazy_plt
->plt_tlsdesc_got1_insn_end
),
4470 (htab
->elf
.splt
->contents
4472 + htab
->lazy_plt
->plt_tlsdesc_got1_offset
));
4473 /* Add offset for indirect branch via GOT+TDG, where TDG
4474 stands for htab->tlsdesc_got, subtracting the offset
4475 to the end of that instruction. */
4476 bfd_put_32 (output_bfd
,
4477 (htab
->elf
.sgot
->output_section
->vma
4478 + htab
->elf
.sgot
->output_offset
4480 - htab
->elf
.splt
->output_section
->vma
4481 - htab
->elf
.splt
->output_offset
4483 - htab
->lazy_plt
->plt_tlsdesc_got2_insn_end
),
4484 (htab
->elf
.splt
->contents
4486 + htab
->lazy_plt
->plt_tlsdesc_got2_offset
));
4490 /* Fill PLT entries for undefined weak symbols in PIE. */
4491 if (bfd_link_pie (info
))
4492 bfd_hash_traverse (&info
->hash
->table
,
4493 elf_x86_64_pie_finish_undefweak_symbol
,
4499 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4500 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4501 It has to be done before elf_link_sort_relocs is called so that
4502 dynamic relocations are properly sorted. */
4505 elf_x86_64_output_arch_local_syms
4506 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4507 struct bfd_link_info
*info
,
4508 void *flaginfo ATTRIBUTE_UNUSED
,
4509 int (*func
) (void *, const char *,
4512 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
4514 struct elf_x86_link_hash_table
*htab
4515 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4519 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4520 htab_traverse (htab
->loc_hash_table
,
4521 elf_x86_64_finish_local_dynamic_symbol
,
4527 /* Forward declaration. */
4528 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
;
4530 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4531 dynamic relocations. */
4534 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
4535 long symcount ATTRIBUTE_UNUSED
,
4536 asymbol
**syms ATTRIBUTE_UNUSED
,
4543 bfd_byte
*plt_contents
;
4545 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
4546 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
4547 const struct elf_x86_lazy_plt_layout
*lazy_bnd_plt
;
4548 const struct elf_x86_non_lazy_plt_layout
*non_lazy_bnd_plt
;
4549 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
4550 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
4552 enum elf_x86_plt_type plt_type
;
4553 struct elf_x86_plt plts
[] =
4555 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
4556 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
4557 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4558 { ".plt.bnd", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4559 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
4564 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
4567 if (dynsymcount
<= 0)
4570 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
4574 if (get_elf_x86_backend_data (abfd
)->target_os
!= is_nacl
)
4576 lazy_plt
= &elf_x86_64_lazy_plt
;
4577 non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
4578 lazy_bnd_plt
= &elf_x86_64_lazy_bnd_plt
;
4579 non_lazy_bnd_plt
= &elf_x86_64_non_lazy_bnd_plt
;
4580 if (ABI_64_P (abfd
))
4582 lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
4583 non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
4587 lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
4588 non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
4593 lazy_plt
= &elf_x86_64_nacl_plt
;
4594 non_lazy_plt
= NULL
;
4595 lazy_bnd_plt
= NULL
;
4596 non_lazy_bnd_plt
= NULL
;
4597 lazy_ibt_plt
= NULL
;
4598 non_lazy_ibt_plt
= NULL
;
4602 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
4604 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
4605 if (plt
== NULL
|| plt
->size
== 0)
4608 /* Get the PLT section contents. */
4609 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
4610 if (plt_contents
== NULL
)
4612 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
4613 plt_contents
, 0, plt
->size
))
4615 free (plt_contents
);
4619 /* Check what kind of PLT it is. */
4620 plt_type
= plt_unknown
;
4621 if (plts
[j
].type
== plt_unknown
4622 && (plt
->size
>= (lazy_plt
->plt_entry_size
4623 + lazy_plt
->plt_entry_size
)))
4625 /* Match lazy PLT first. Need to check the first two
4627 if ((memcmp (plt_contents
, lazy_plt
->plt0_entry
,
4628 lazy_plt
->plt0_got1_offset
) == 0)
4629 && (memcmp (plt_contents
+ 6, lazy_plt
->plt0_entry
+ 6,
4631 plt_type
= plt_lazy
;
4632 else if (lazy_bnd_plt
!= NULL
4633 && (memcmp (plt_contents
, lazy_bnd_plt
->plt0_entry
,
4634 lazy_bnd_plt
->plt0_got1_offset
) == 0)
4635 && (memcmp (plt_contents
+ 6,
4636 lazy_bnd_plt
->plt0_entry
+ 6, 3) == 0))
4638 plt_type
= plt_lazy
| plt_second
;
4639 /* The fist entry in the lazy IBT PLT is the same as the
4641 if ((memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
4642 lazy_ibt_plt
->plt_entry
,
4643 lazy_ibt_plt
->plt_got_offset
) == 0))
4644 lazy_plt
= lazy_ibt_plt
;
4646 lazy_plt
= lazy_bnd_plt
;
4650 if (non_lazy_plt
!= NULL
4651 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
4652 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
4654 /* Match non-lazy PLT. */
4655 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
4656 non_lazy_plt
->plt_got_offset
) == 0)
4657 plt_type
= plt_non_lazy
;
4660 if (plt_type
== plt_unknown
|| plt_type
== plt_second
)
4662 if (non_lazy_bnd_plt
!= NULL
4663 && plt
->size
>= non_lazy_bnd_plt
->plt_entry_size
4664 && (memcmp (plt_contents
, non_lazy_bnd_plt
->plt_entry
,
4665 non_lazy_bnd_plt
->plt_got_offset
) == 0))
4667 /* Match BND PLT. */
4668 plt_type
= plt_second
;
4669 non_lazy_plt
= non_lazy_bnd_plt
;
4671 else if (non_lazy_ibt_plt
!= NULL
4672 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
4673 && (memcmp (plt_contents
,
4674 non_lazy_ibt_plt
->plt_entry
,
4675 non_lazy_ibt_plt
->plt_got_offset
) == 0))
4677 /* Match IBT PLT. */
4678 plt_type
= plt_second
;
4679 non_lazy_plt
= non_lazy_ibt_plt
;
4683 if (plt_type
== plt_unknown
)
4685 free (plt_contents
);
4690 plts
[j
].type
= plt_type
;
4692 if ((plt_type
& plt_lazy
))
4694 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
4695 plts
[j
].plt_got_insn_size
= lazy_plt
->plt_got_insn_size
;
4696 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
4697 /* Skip PLT0 in lazy PLT. */
4702 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
4703 plts
[j
].plt_got_insn_size
= non_lazy_plt
->plt_got_insn_size
;
4704 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
4708 /* Skip lazy PLT when the second PLT is used. */
4709 if (plt_type
== (plt_lazy
| plt_second
))
4713 n
= plt
->size
/ plts
[j
].plt_entry_size
;
4718 plts
[j
].contents
= plt_contents
;
4721 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
4722 (bfd_vma
) 0, plts
, dynsyms
,
4726 /* Handle an x86-64 specific section when reading an object file. This
4727 is called when elfcode.h finds a section with an unknown type. */
4730 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
4731 const char *name
, int shindex
)
4733 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4736 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4742 /* Hook called by the linker routine which adds symbols from an object
4743 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4747 elf_x86_64_add_symbol_hook (bfd
*abfd
,
4748 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4749 Elf_Internal_Sym
*sym
,
4750 const char **namep ATTRIBUTE_UNUSED
,
4751 flagword
*flagsp ATTRIBUTE_UNUSED
,
4757 switch (sym
->st_shndx
)
4759 case SHN_X86_64_LCOMMON
:
4760 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
4763 lcomm
= bfd_make_section_with_flags (abfd
,
4767 | SEC_LINKER_CREATED
));
4770 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
4773 *valp
= sym
->st_size
;
4781 /* Given a BFD section, try to locate the corresponding ELF section
4785 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
4786 asection
*sec
, int *index_return
)
4788 if (sec
== &_bfd_elf_large_com_section
)
4790 *index_return
= SHN_X86_64_LCOMMON
;
4796 /* Process a symbol. */
4799 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
4802 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
4804 switch (elfsym
->internal_elf_sym
.st_shndx
)
4806 case SHN_X86_64_LCOMMON
:
4807 asym
->section
= &_bfd_elf_large_com_section
;
4808 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
4809 /* Common symbol doesn't set BSF_GLOBAL. */
4810 asym
->flags
&= ~BSF_GLOBAL
;
4816 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
4818 return (sym
->st_shndx
== SHN_COMMON
4819 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
4823 elf_x86_64_common_section_index (asection
*sec
)
4825 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
4828 return SHN_X86_64_LCOMMON
;
4832 elf_x86_64_common_section (asection
*sec
)
4834 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
4835 return bfd_com_section_ptr
;
4837 return &_bfd_elf_large_com_section
;
4841 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
4842 const Elf_Internal_Sym
*sym
,
4847 const asection
*oldsec
)
4849 /* A normal common symbol and a large common symbol result in a
4850 normal common symbol. We turn the large common symbol into a
4853 && h
->root
.type
== bfd_link_hash_common
4855 && bfd_is_com_section (*psec
)
4858 if (sym
->st_shndx
== SHN_COMMON
4859 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
4861 h
->root
.u
.c
.p
->section
4862 = bfd_make_section_old_way (oldbfd
, "COMMON");
4863 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
4865 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
4866 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
4867 *psec
= bfd_com_section_ptr
;
4874 elf_x86_64_additional_program_headers (bfd
*abfd
,
4875 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
4880 /* Check to see if we need a large readonly segment. */
4881 s
= bfd_get_section_by_name (abfd
, ".lrodata");
4882 if (s
&& (s
->flags
& SEC_LOAD
))
4885 /* Check to see if we need a large data segment. Since .lbss sections
4886 is placed right after the .bss section, there should be no need for
4887 a large data segment just because of .lbss. */
4888 s
= bfd_get_section_by_name (abfd
, ".ldata");
4889 if (s
&& (s
->flags
& SEC_LOAD
))
4895 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
4898 elf_x86_64_relocs_compatible (const bfd_target
*input
,
4899 const bfd_target
*output
)
4901 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
4902 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
4903 && _bfd_elf_relocs_compatible (input
, output
));
4906 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
4907 with GNU properties if found. Otherwise, return NULL. */
4910 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info
*info
)
4912 struct elf_x86_init_table init_table
;
4914 if ((int) R_X86_64_standard
>= (int) R_X86_64_converted_reloc_bit
4915 || (int) R_X86_64_max
<= (int) R_X86_64_converted_reloc_bit
4916 || ((int) (R_X86_64_GNU_VTINHERIT
| R_X86_64_converted_reloc_bit
)
4917 != (int) R_X86_64_GNU_VTINHERIT
)
4918 || ((int) (R_X86_64_GNU_VTENTRY
| R_X86_64_converted_reloc_bit
)
4919 != (int) R_X86_64_GNU_VTENTRY
))
4922 /* This is unused for x86-64. */
4923 init_table
.plt0_pad_byte
= 0x90;
4925 if (get_elf_x86_backend_data (info
->output_bfd
)->target_os
!= is_nacl
)
4929 init_table
.lazy_plt
= &elf_x86_64_lazy_bnd_plt
;
4930 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_bnd_plt
;
4934 init_table
.lazy_plt
= &elf_x86_64_lazy_plt
;
4935 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
4938 if (ABI_64_P (info
->output_bfd
))
4940 init_table
.lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
4941 init_table
.non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
4945 init_table
.lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
4946 init_table
.non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
4951 init_table
.lazy_plt
= &elf_x86_64_nacl_plt
;
4952 init_table
.non_lazy_plt
= NULL
;
4953 init_table
.lazy_ibt_plt
= NULL
;
4954 init_table
.non_lazy_ibt_plt
= NULL
;
4957 if (ABI_64_P (info
->output_bfd
))
4959 init_table
.r_info
= elf64_r_info
;
4960 init_table
.r_sym
= elf64_r_sym
;
4964 init_table
.r_info
= elf32_r_info
;
4965 init_table
.r_sym
= elf32_r_sym
;
4968 return _bfd_x86_elf_link_setup_gnu_properties (info
, &init_table
);
4971 static const struct bfd_elf_special_section
4972 elf_x86_64_special_sections
[]=
4974 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
4975 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
4976 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
4977 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
4978 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
4979 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
4980 { NULL
, 0, 0, 0, 0 }
4983 #define TARGET_LITTLE_SYM x86_64_elf64_vec
4984 #define TARGET_LITTLE_NAME "elf64-x86-64"
4985 #define ELF_ARCH bfd_arch_i386
4986 #define ELF_TARGET_ID X86_64_ELF_DATA
4987 #define ELF_MACHINE_CODE EM_X86_64
4988 #if DEFAULT_LD_Z_SEPARATE_CODE
4989 # define ELF_MAXPAGESIZE 0x1000
4991 # define ELF_MAXPAGESIZE 0x200000
4993 #define ELF_MINPAGESIZE 0x1000
4994 #define ELF_COMMONPAGESIZE 0x1000
4996 #define elf_backend_can_gc_sections 1
4997 #define elf_backend_can_refcount 1
4998 #define elf_backend_want_got_plt 1
4999 #define elf_backend_plt_readonly 1
5000 #define elf_backend_want_plt_sym 0
5001 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5002 #define elf_backend_rela_normal 1
5003 #define elf_backend_plt_alignment 4
5004 #define elf_backend_extern_protected_data 1
5005 #define elf_backend_caches_rawsize 1
5006 #define elf_backend_dtrel_excludes_plt 1
5007 #define elf_backend_want_dynrelro 1
5009 #define elf_info_to_howto elf_x86_64_info_to_howto
5011 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5012 #define bfd_elf64_bfd_reloc_name_lookup \
5013 elf_x86_64_reloc_name_lookup
5015 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5016 #define elf_backend_check_relocs elf_x86_64_check_relocs
5017 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5018 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5019 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5020 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
5021 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5022 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5024 #define elf_backend_write_core_note elf_x86_64_write_core_note
5026 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5027 #define elf_backend_relocate_section elf_x86_64_relocate_section
5028 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5029 #define elf_backend_object_p elf64_x86_64_elf_object_p
5030 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5032 #define elf_backend_section_from_shdr \
5033 elf_x86_64_section_from_shdr
5035 #define elf_backend_section_from_bfd_section \
5036 elf_x86_64_elf_section_from_bfd_section
5037 #define elf_backend_add_symbol_hook \
5038 elf_x86_64_add_symbol_hook
5039 #define elf_backend_symbol_processing \
5040 elf_x86_64_symbol_processing
5041 #define elf_backend_common_section_index \
5042 elf_x86_64_common_section_index
5043 #define elf_backend_common_section \
5044 elf_x86_64_common_section
5045 #define elf_backend_common_definition \
5046 elf_x86_64_common_definition
5047 #define elf_backend_merge_symbol \
5048 elf_x86_64_merge_symbol
5049 #define elf_backend_special_sections \
5050 elf_x86_64_special_sections
5051 #define elf_backend_additional_program_headers \
5052 elf_x86_64_additional_program_headers
5053 #define elf_backend_setup_gnu_properties \
5054 elf_x86_64_link_setup_gnu_properties
5055 #define elf_backend_hide_symbol \
5056 _bfd_x86_elf_hide_symbol
5059 #define elf64_bed elf64_x86_64_bed
5061 #include "elf64-target.h"
5063 /* CloudABI support. */
5065 #undef TARGET_LITTLE_SYM
5066 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5067 #undef TARGET_LITTLE_NAME
5068 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5071 #define ELF_OSABI ELFOSABI_CLOUDABI
5074 #define elf64_bed elf64_x86_64_cloudabi_bed
5076 #include "elf64-target.h"
5078 /* FreeBSD support. */
5080 #undef TARGET_LITTLE_SYM
5081 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5082 #undef TARGET_LITTLE_NAME
5083 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5086 #define ELF_OSABI ELFOSABI_FREEBSD
5089 #define elf64_bed elf64_x86_64_fbsd_bed
5091 #include "elf64-target.h"
5093 /* Solaris 2 support. */
5095 #undef TARGET_LITTLE_SYM
5096 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5097 #undef TARGET_LITTLE_NAME
5098 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5100 static const struct elf_x86_backend_data elf_x86_64_solaris_arch_bed
=
5105 #undef elf_backend_arch_data
5106 #define elf_backend_arch_data &elf_x86_64_solaris_arch_bed
5108 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5109 objects won't be recognized. */
5113 #define elf64_bed elf64_x86_64_sol2_bed
5115 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5117 #undef elf_backend_static_tls_alignment
5118 #define elf_backend_static_tls_alignment 16
5120 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5122 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5124 #undef elf_backend_want_plt_sym
5125 #define elf_backend_want_plt_sym 1
5127 #undef elf_backend_strtab_flags
5128 #define elf_backend_strtab_flags SHF_STRINGS
5131 elf64_x86_64_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
5132 bfd
*obfd ATTRIBUTE_UNUSED
,
5133 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
5134 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
5136 /* PR 19938: FIXME: Need to add code for setting the sh_info
5137 and sh_link fields of Solaris specific section types. */
5141 #undef elf_backend_copy_special_section_fields
5142 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
5144 #include "elf64-target.h"
5146 /* Native Client support. */
5149 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
5151 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5152 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
5156 #undef TARGET_LITTLE_SYM
5157 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
5158 #undef TARGET_LITTLE_NAME
5159 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5161 #define elf64_bed elf64_x86_64_nacl_bed
5163 #undef ELF_MAXPAGESIZE
5164 #undef ELF_MINPAGESIZE
5165 #undef ELF_COMMONPAGESIZE
5166 #define ELF_MAXPAGESIZE 0x10000
5167 #define ELF_MINPAGESIZE 0x10000
5168 #define ELF_COMMONPAGESIZE 0x10000
5170 /* Restore defaults. */
5172 #undef elf_backend_static_tls_alignment
5173 #undef elf_backend_want_plt_sym
5174 #define elf_backend_want_plt_sym 0
5175 #undef elf_backend_strtab_flags
5176 #undef elf_backend_copy_special_section_fields
5178 /* NaCl uses substantially different PLT entries for the same effects. */
5180 #undef elf_backend_plt_alignment
5181 #define elf_backend_plt_alignment 5
5182 #define NACL_PLT_ENTRY_SIZE 64
5183 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5185 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
5187 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5188 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5189 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5190 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5191 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5193 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5194 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
5196 /* 32 bytes of nop to pad out to the standard size. */
5197 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5198 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5199 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5200 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5201 0x66, /* excess data16 prefix */
5205 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5207 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5208 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5209 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5210 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5212 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5213 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5214 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5216 /* Lazy GOT entries point here (32-byte aligned). */
5217 0x68, /* pushq immediate */
5218 0, 0, 0, 0, /* replaced with index into relocation table. */
5219 0xe9, /* jmp relative */
5220 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5222 /* 22 bytes of nop to pad out to the standard size. */
5223 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5224 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5225 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5228 /* .eh_frame covering the .plt section. */
5230 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
5232 #if (PLT_CIE_LENGTH != 20 \
5233 || PLT_FDE_LENGTH != 36 \
5234 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5235 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5236 # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
5238 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5239 0, 0, 0, 0, /* CIE ID */
5240 1, /* CIE version */
5241 'z', 'R', 0, /* Augmentation string */
5242 1, /* Code alignment factor */
5243 0x78, /* Data alignment factor */
5244 16, /* Return address column */
5245 1, /* Augmentation size */
5246 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5247 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5248 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5249 DW_CFA_nop
, DW_CFA_nop
,
5251 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5252 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
5253 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5254 0, 0, 0, 0, /* .plt size goes here */
5255 0, /* Augmentation size */
5256 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
5257 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5258 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
5259 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5260 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5261 13, /* Block length */
5262 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
5263 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
5264 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5265 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
5266 DW_CFA_nop
, DW_CFA_nop
5269 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
=
5271 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
5272 NACL_PLT_ENTRY_SIZE
, /* plt0_entry_size */
5273 elf_x86_64_nacl_plt_entry
, /* plt_entry */
5274 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5275 elf_x86_64_nacl_plt0_entry
, /* plt_tlsdesc_entry */
5276 NACL_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
5277 2, /* plt_tlsdesc_got1_offset */
5278 9, /* plt_tlsdesc_got2_offset */
5279 6, /* plt_tlsdesc_got1_insn_end */
5280 13, /* plt_tlsdesc_got2_insn_end */
5281 2, /* plt0_got1_offset */
5282 9, /* plt0_got2_offset */
5283 13, /* plt0_got2_insn_end */
5284 3, /* plt_got_offset */
5285 33, /* plt_reloc_offset */
5286 38, /* plt_plt_offset */
5287 7, /* plt_got_insn_size */
5288 42, /* plt_plt_insn_end */
5289 32, /* plt_lazy_offset */
5290 elf_x86_64_nacl_plt0_entry
, /* pic_plt0_entry */
5291 elf_x86_64_nacl_plt_entry
, /* pic_plt_entry */
5292 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
5293 sizeof (elf_x86_64_nacl_eh_frame_plt
) /* eh_frame_plt_size */
5296 static const struct elf_x86_backend_data elf_x86_64_nacl_arch_bed
=
5301 #undef elf_backend_arch_data
5302 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5304 #undef elf_backend_object_p
5305 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5306 #undef elf_backend_modify_segment_map
5307 #define elf_backend_modify_segment_map nacl_modify_segment_map
5308 #undef elf_backend_modify_program_headers
5309 #define elf_backend_modify_program_headers nacl_modify_program_headers
5310 #undef elf_backend_final_write_processing
5311 #define elf_backend_final_write_processing nacl_final_write_processing
5313 #include "elf64-target.h"
5315 /* Native Client x32 support. */
5318 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
5320 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5321 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
5325 #undef TARGET_LITTLE_SYM
5326 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
5327 #undef TARGET_LITTLE_NAME
5328 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5330 #define elf32_bed elf32_x86_64_nacl_bed
5332 #define bfd_elf32_bfd_reloc_type_lookup \
5333 elf_x86_64_reloc_type_lookup
5334 #define bfd_elf32_bfd_reloc_name_lookup \
5335 elf_x86_64_reloc_name_lookup
5336 #define bfd_elf32_get_synthetic_symtab \
5337 elf_x86_64_get_synthetic_symtab
5339 #undef elf_backend_object_p
5340 #define elf_backend_object_p \
5341 elf32_x86_64_nacl_elf_object_p
5343 #undef elf_backend_bfd_from_remote_memory
5344 #define elf_backend_bfd_from_remote_memory \
5345 _bfd_elf32_bfd_from_remote_memory
5347 #undef elf_backend_size_info
5348 #define elf_backend_size_info \
5349 _bfd_elf32_size_info
5352 #define elf32_bed elf32_x86_64_bed
5354 #include "elf32-target.h"
5356 /* Restore defaults. */
5357 #undef elf_backend_object_p
5358 #define elf_backend_object_p elf64_x86_64_elf_object_p
5359 #undef elf_backend_bfd_from_remote_memory
5360 #undef elf_backend_size_info
5361 #undef elf_backend_modify_segment_map
5362 #undef elf_backend_modify_program_headers
5363 #undef elf_backend_final_write_processing
5365 /* Intel L1OM support. */
5368 elf64_l1om_elf_object_p (bfd
*abfd
)
5370 /* Set the right machine number for an L1OM elf64 file. */
5371 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5375 #undef TARGET_LITTLE_SYM
5376 #define TARGET_LITTLE_SYM l1om_elf64_vec
5377 #undef TARGET_LITTLE_NAME
5378 #define TARGET_LITTLE_NAME "elf64-l1om"
5380 #define ELF_ARCH bfd_arch_l1om
5382 #undef ELF_MACHINE_CODE
5383 #define ELF_MACHINE_CODE EM_L1OM
5388 #define elf64_bed elf64_l1om_bed
5390 #undef elf_backend_object_p
5391 #define elf_backend_object_p elf64_l1om_elf_object_p
5393 /* Restore defaults. */
5394 #undef ELF_MAXPAGESIZE
5395 #undef ELF_MINPAGESIZE
5396 #undef ELF_COMMONPAGESIZE
5397 #if DEFAULT_LD_Z_SEPARATE_CODE
5398 # define ELF_MAXPAGESIZE 0x1000
5400 # define ELF_MAXPAGESIZE 0x200000
5402 #define ELF_MINPAGESIZE 0x1000
5403 #define ELF_COMMONPAGESIZE 0x1000
5404 #undef elf_backend_plt_alignment
5405 #define elf_backend_plt_alignment 4
5406 #undef elf_backend_arch_data
5407 #define elf_backend_arch_data &elf_x86_64_arch_bed
5409 #include "elf64-target.h"
5411 /* FreeBSD L1OM support. */
5413 #undef TARGET_LITTLE_SYM
5414 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5415 #undef TARGET_LITTLE_NAME
5416 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5419 #define ELF_OSABI ELFOSABI_FREEBSD
5422 #define elf64_bed elf64_l1om_fbsd_bed
5424 #include "elf64-target.h"
5426 /* Intel K1OM support. */
5429 elf64_k1om_elf_object_p (bfd
*abfd
)
5431 /* Set the right machine number for an K1OM elf64 file. */
5432 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5436 #undef TARGET_LITTLE_SYM
5437 #define TARGET_LITTLE_SYM k1om_elf64_vec
5438 #undef TARGET_LITTLE_NAME
5439 #define TARGET_LITTLE_NAME "elf64-k1om"
5441 #define ELF_ARCH bfd_arch_k1om
5443 #undef ELF_MACHINE_CODE
5444 #define ELF_MACHINE_CODE EM_K1OM
5449 #define elf64_bed elf64_k1om_bed
5451 #undef elf_backend_object_p
5452 #define elf_backend_object_p elf64_k1om_elf_object_p
5454 #undef elf_backend_static_tls_alignment
5456 #undef elf_backend_want_plt_sym
5457 #define elf_backend_want_plt_sym 0
5459 #include "elf64-target.h"
5461 /* FreeBSD K1OM support. */
5463 #undef TARGET_LITTLE_SYM
5464 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
5465 #undef TARGET_LITTLE_NAME
5466 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5469 #define ELF_OSABI ELFOSABI_FREEBSD
5472 #define elf64_bed elf64_k1om_fbsd_bed
5474 #include "elf64-target.h"
5476 /* 32bit x86-64 support. */
5478 #undef TARGET_LITTLE_SYM
5479 #define TARGET_LITTLE_SYM x86_64_elf32_vec
5480 #undef TARGET_LITTLE_NAME
5481 #define TARGET_LITTLE_NAME "elf32-x86-64"
5485 #define ELF_ARCH bfd_arch_i386
5487 #undef ELF_MACHINE_CODE
5488 #define ELF_MACHINE_CODE EM_X86_64
5492 #undef elf_backend_object_p
5493 #define elf_backend_object_p \
5494 elf32_x86_64_elf_object_p
5496 #undef elf_backend_bfd_from_remote_memory
5497 #define elf_backend_bfd_from_remote_memory \
5498 _bfd_elf32_bfd_from_remote_memory
5500 #undef elf_backend_size_info
5501 #define elf_backend_size_info \
5502 _bfd_elf32_size_info
5504 #include "elf32-target.h"