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 if (!is_x86_elf (input_bfd
, htab
))
2394 bfd_set_error (bfd_error_wrong_format
);
2398 plt_entry_size
= htab
->plt
.plt_entry_size
;
2399 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2400 sym_hashes
= elf_sym_hashes (input_bfd
);
2401 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2402 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
2404 _bfd_x86_elf_set_tls_module_base (info
);
2406 rel
= wrel
= relocs
;
2407 relend
= relocs
+ input_section
->reloc_count
;
2408 for (; rel
< relend
; wrel
++, rel
++)
2410 unsigned int r_type
, r_type_tls
;
2411 reloc_howto_type
*howto
;
2412 unsigned long r_symndx
;
2413 struct elf_link_hash_entry
*h
;
2414 struct elf_x86_link_hash_entry
*eh
;
2415 Elf_Internal_Sym
*sym
;
2417 bfd_vma off
, offplt
, plt_offset
;
2419 bfd_boolean unresolved_reloc
;
2420 bfd_reloc_status_type r
;
2422 asection
*base_got
, *resolved_plt
;
2424 bfd_boolean resolved_to_zero
;
2425 bfd_boolean relative_reloc
;
2426 bfd_boolean converted_reloc
;
2427 bfd_boolean need_copy_reloc_in_pie
;
2429 r_type
= ELF32_R_TYPE (rel
->r_info
);
2430 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
2431 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
2438 r_symndx
= htab
->r_sym (rel
->r_info
);
2439 converted_reloc
= (r_type
& R_X86_64_converted_reloc_bit
) != 0;
2440 if (converted_reloc
)
2442 r_type
&= ~R_X86_64_converted_reloc_bit
;
2443 rel
->r_info
= htab
->r_info (r_symndx
, r_type
);
2446 if (r_type
>= (int) R_X86_64_standard
)
2447 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
2449 if (r_type
!= (int) R_X86_64_32
2450 || ABI_64_P (output_bfd
))
2451 howto
= x86_64_elf_howto_table
+ r_type
;
2453 howto
= (x86_64_elf_howto_table
2454 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
2458 unresolved_reloc
= FALSE
;
2459 if (r_symndx
< symtab_hdr
->sh_info
)
2461 sym
= local_syms
+ r_symndx
;
2462 sec
= local_sections
[r_symndx
];
2464 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
2466 st_size
= sym
->st_size
;
2468 /* Relocate against local STT_GNU_IFUNC symbol. */
2469 if (!bfd_link_relocatable (info
)
2470 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2472 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
,
2477 /* Set STT_GNU_IFUNC symbol value. */
2478 h
->root
.u
.def
.value
= sym
->st_value
;
2479 h
->root
.u
.def
.section
= sec
;
2484 bfd_boolean warned ATTRIBUTE_UNUSED
;
2485 bfd_boolean ignored ATTRIBUTE_UNUSED
;
2487 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2488 r_symndx
, symtab_hdr
, sym_hashes
,
2490 unresolved_reloc
, warned
, ignored
);
2494 if (sec
!= NULL
&& discarded_section (sec
))
2496 _bfd_clear_contents (howto
, input_bfd
, input_section
,
2497 contents
, rel
->r_offset
);
2498 wrel
->r_offset
= rel
->r_offset
;
2502 /* For ld -r, remove relocations in debug sections against
2503 sections defined in discarded sections. Not done for
2504 eh_frame editing code expects to be present. */
2505 if (bfd_link_relocatable (info
)
2506 && (input_section
->flags
& SEC_DEBUGGING
))
2512 if (bfd_link_relocatable (info
))
2519 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
2521 if (r_type
== R_X86_64_64
)
2523 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
2524 zero-extend it to 64bit if addend is zero. */
2525 r_type
= R_X86_64_32
;
2526 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2528 else if (r_type
== R_X86_64_SIZE64
)
2530 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
2531 zero-extend it to 64bit if addend is zero. */
2532 r_type
= R_X86_64_SIZE32
;
2533 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2537 eh
= (struct elf_x86_link_hash_entry
*) h
;
2539 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2540 it here if it is defined in a non-shared object. */
2542 && h
->type
== STT_GNU_IFUNC
2548 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2550 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2551 STT_GNU_IFUNC symbol as STT_FUNC. */
2552 if (elf_section_type (input_section
) == SHT_NOTE
)
2554 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2555 sections because such sections are not SEC_ALLOC and
2556 thus ld.so will not process them. */
2557 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2567 case R_X86_64_GOTPCREL
:
2568 case R_X86_64_GOTPCRELX
:
2569 case R_X86_64_REX_GOTPCRELX
:
2570 case R_X86_64_GOTPCREL64
:
2571 base_got
= htab
->elf
.sgot
;
2572 off
= h
->got
.offset
;
2574 if (base_got
== NULL
)
2577 if (off
== (bfd_vma
) -1)
2579 /* We can't use h->got.offset here to save state, or
2580 even just remember the offset, as finish_dynamic_symbol
2581 would use that as offset into .got. */
2583 if (h
->plt
.offset
== (bfd_vma
) -1)
2586 if (htab
->elf
.splt
!= NULL
)
2588 plt_index
= (h
->plt
.offset
/ plt_entry_size
2589 - htab
->plt
.has_plt0
);
2590 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2591 base_got
= htab
->elf
.sgotplt
;
2595 plt_index
= h
->plt
.offset
/ plt_entry_size
;
2596 off
= plt_index
* GOT_ENTRY_SIZE
;
2597 base_got
= htab
->elf
.igotplt
;
2600 if (h
->dynindx
== -1
2604 /* This references the local defitionion. We must
2605 initialize this entry in the global offset table.
2606 Since the offset must always be a multiple of 8,
2607 we use the least significant bit to record
2608 whether we have initialized it already.
2610 When doing a dynamic link, we create a .rela.got
2611 relocation entry to initialize the value. This
2612 is done in the finish_dynamic_symbol routine. */
2617 bfd_put_64 (output_bfd
, relocation
,
2618 base_got
->contents
+ off
);
2619 /* Note that this is harmless for the GOTPLT64
2620 case, as -1 | 1 still is -1. */
2626 relocation
= (base_got
->output_section
->vma
2627 + base_got
->output_offset
+ off
);
2632 if (h
->plt
.offset
== (bfd_vma
) -1)
2634 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2635 if (r_type
== htab
->pointer_r_type
2636 && (input_section
->flags
& SEC_CODE
) == 0)
2637 goto do_ifunc_pointer
;
2638 goto bad_ifunc_reloc
;
2641 /* STT_GNU_IFUNC symbol must go through PLT. */
2642 if (htab
->elf
.splt
!= NULL
)
2644 if (htab
->plt_second
!= NULL
)
2646 resolved_plt
= htab
->plt_second
;
2647 plt_offset
= eh
->plt_second
.offset
;
2651 resolved_plt
= htab
->elf
.splt
;
2652 plt_offset
= h
->plt
.offset
;
2657 resolved_plt
= htab
->elf
.iplt
;
2658 plt_offset
= h
->plt
.offset
;
2661 relocation
= (resolved_plt
->output_section
->vma
2662 + resolved_plt
->output_offset
+ plt_offset
);
2668 if (h
->root
.root
.string
)
2669 name
= h
->root
.root
.string
;
2671 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2674 /* xgettext:c-format */
2675 (_("%pB: relocation %s against STT_GNU_IFUNC "
2676 "symbol `%s' isn't supported"), input_bfd
,
2678 bfd_set_error (bfd_error_bad_value
);
2682 if (bfd_link_pic (info
))
2687 if (ABI_64_P (output_bfd
))
2692 if (rel
->r_addend
!= 0)
2694 if (h
->root
.root
.string
)
2695 name
= h
->root
.root
.string
;
2697 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
2700 /* xgettext:c-format */
2701 (_("%pB: relocation %s against STT_GNU_IFUNC "
2702 "symbol `%s' has non-zero addend: %" PRId64
),
2703 input_bfd
, howto
->name
, name
, (int64_t) rel
->r_addend
);
2704 bfd_set_error (bfd_error_bad_value
);
2708 /* Generate dynamic relcoation only when there is a
2709 non-GOT reference in a shared object or there is no
2711 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2712 || h
->plt
.offset
== (bfd_vma
) -1)
2714 Elf_Internal_Rela outrel
;
2717 /* Need a dynamic relocation to get the real function
2719 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2723 if (outrel
.r_offset
== (bfd_vma
) -1
2724 || outrel
.r_offset
== (bfd_vma
) -2)
2727 outrel
.r_offset
+= (input_section
->output_section
->vma
2728 + input_section
->output_offset
);
2730 if (POINTER_LOCAL_IFUNC_P (info
, h
))
2732 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
2733 h
->root
.root
.string
,
2734 h
->root
.u
.def
.section
->owner
);
2736 /* This symbol is resolved locally. */
2737 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
2738 outrel
.r_addend
= (h
->root
.u
.def
.value
2739 + h
->root
.u
.def
.section
->output_section
->vma
2740 + h
->root
.u
.def
.section
->output_offset
);
2744 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
2745 outrel
.r_addend
= 0;
2748 /* Dynamic relocations are stored in
2749 1. .rela.ifunc section in PIC object.
2750 2. .rela.got section in dynamic executable.
2751 3. .rela.iplt section in static executable. */
2752 if (bfd_link_pic (info
))
2753 sreloc
= htab
->elf
.irelifunc
;
2754 else if (htab
->elf
.splt
!= NULL
)
2755 sreloc
= htab
->elf
.srelgot
;
2757 sreloc
= htab
->elf
.irelplt
;
2758 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2760 /* If this reloc is against an external symbol, we
2761 do not want to fiddle with the addend. Otherwise,
2762 we need to include the symbol value so that it
2763 becomes an addend for the dynamic reloc. For an
2764 internal symbol, we have updated addend. */
2769 case R_X86_64_PC32_BND
:
2771 case R_X86_64_PLT32
:
2772 case R_X86_64_PLT32_BND
:
2778 resolved_to_zero
= (eh
!= NULL
2779 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
2781 /* When generating a shared object, the relocations handled here are
2782 copied into the output file to be resolved at run time. */
2785 case R_X86_64_GOT32
:
2786 case R_X86_64_GOT64
:
2787 /* Relocation is to the entry for this symbol in the global
2789 case R_X86_64_GOTPCREL
:
2790 case R_X86_64_GOTPCRELX
:
2791 case R_X86_64_REX_GOTPCRELX
:
2792 case R_X86_64_GOTPCREL64
:
2793 /* Use global offset table entry as symbol value. */
2794 case R_X86_64_GOTPLT64
:
2795 /* This is obsolete and treated the same as GOT64. */
2796 base_got
= htab
->elf
.sgot
;
2798 if (htab
->elf
.sgot
== NULL
)
2801 relative_reloc
= FALSE
;
2804 off
= h
->got
.offset
;
2806 && h
->plt
.offset
!= (bfd_vma
)-1
2807 && off
== (bfd_vma
)-1)
2809 /* We can't use h->got.offset here to save
2810 state, or even just remember the offset, as
2811 finish_dynamic_symbol would use that as offset into
2813 bfd_vma plt_index
= (h
->plt
.offset
/ plt_entry_size
2814 - htab
->plt
.has_plt0
);
2815 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2816 base_got
= htab
->elf
.sgotplt
;
2819 if (RESOLVED_LOCALLY_P (info
, h
, htab
))
2821 /* We must initialize this entry in the global offset
2822 table. Since the offset must always be a multiple
2823 of 8, we use the least significant bit to record
2824 whether we have initialized it already.
2826 When doing a dynamic link, we create a .rela.got
2827 relocation entry to initialize the value. This is
2828 done in the finish_dynamic_symbol routine. */
2833 bfd_put_64 (output_bfd
, relocation
,
2834 base_got
->contents
+ off
);
2835 /* Note that this is harmless for the GOTPLT64 case,
2836 as -1 | 1 still is -1. */
2839 if (GENERATE_RELATIVE_RELOC_P (info
, h
))
2841 /* If this symbol isn't dynamic in PIC,
2842 generate R_X86_64_RELATIVE here. */
2843 eh
->no_finish_dynamic_symbol
= 1;
2844 relative_reloc
= TRUE
;
2849 unresolved_reloc
= FALSE
;
2853 if (local_got_offsets
== NULL
)
2856 off
= local_got_offsets
[r_symndx
];
2858 /* The offset must always be a multiple of 8. We use
2859 the least significant bit to record whether we have
2860 already generated the necessary reloc. */
2865 bfd_put_64 (output_bfd
, relocation
,
2866 base_got
->contents
+ off
);
2867 local_got_offsets
[r_symndx
] |= 1;
2869 if (bfd_link_pic (info
))
2870 relative_reloc
= TRUE
;
2877 Elf_Internal_Rela outrel
;
2879 /* We need to generate a R_X86_64_RELATIVE reloc
2880 for the dynamic linker. */
2881 s
= htab
->elf
.srelgot
;
2885 outrel
.r_offset
= (base_got
->output_section
->vma
2886 + base_got
->output_offset
2888 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
2889 outrel
.r_addend
= relocation
;
2890 elf_append_rela (output_bfd
, s
, &outrel
);
2893 if (off
>= (bfd_vma
) -2)
2896 relocation
= base_got
->output_section
->vma
2897 + base_got
->output_offset
+ off
;
2898 if (r_type
!= R_X86_64_GOTPCREL
2899 && r_type
!= R_X86_64_GOTPCRELX
2900 && r_type
!= R_X86_64_REX_GOTPCRELX
2901 && r_type
!= R_X86_64_GOTPCREL64
)
2902 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2903 - htab
->elf
.sgotplt
->output_offset
;
2907 case R_X86_64_GOTOFF64
:
2908 /* Relocation is relative to the start of the global offset
2911 /* Check to make sure it isn't a protected function or data
2912 symbol for shared library since it may not be local when
2913 used as function address or with copy relocation. We also
2914 need to make sure that a symbol is referenced locally. */
2915 if (bfd_link_pic (info
) && h
)
2917 if (!h
->def_regular
)
2921 switch (ELF_ST_VISIBILITY (h
->other
))
2924 v
= _("hidden symbol");
2927 v
= _("internal symbol");
2930 v
= _("protected symbol");
2938 /* xgettext:c-format */
2939 (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s"
2940 " `%s' can not be used when making a shared object"),
2941 input_bfd
, v
, h
->root
.root
.string
);
2942 bfd_set_error (bfd_error_bad_value
);
2945 else if (!bfd_link_executable (info
)
2946 && !SYMBOL_REFERENCES_LOCAL_P (info
, h
)
2947 && (h
->type
== STT_FUNC
2948 || h
->type
== STT_OBJECT
)
2949 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2952 /* xgettext:c-format */
2953 (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s"
2954 " `%s' can not be used when making a shared object"),
2956 h
->type
== STT_FUNC
? "function" : "data",
2957 h
->root
.root
.string
);
2958 bfd_set_error (bfd_error_bad_value
);
2963 /* Note that sgot is not involved in this
2964 calculation. We always want the start of .got.plt. If we
2965 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2966 permitted by the ABI, we might have to change this
2968 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2969 + htab
->elf
.sgotplt
->output_offset
;
2972 case R_X86_64_GOTPC32
:
2973 case R_X86_64_GOTPC64
:
2974 /* Use global offset table as symbol value. */
2975 relocation
= htab
->elf
.sgotplt
->output_section
->vma
2976 + htab
->elf
.sgotplt
->output_offset
;
2977 unresolved_reloc
= FALSE
;
2980 case R_X86_64_PLTOFF64
:
2981 /* Relocation is PLT entry relative to GOT. For local
2982 symbols it's the symbol itself relative to GOT. */
2984 /* See PLT32 handling. */
2985 && (h
->plt
.offset
!= (bfd_vma
) -1
2986 || eh
->plt_got
.offset
!= (bfd_vma
) -1)
2987 && htab
->elf
.splt
!= NULL
)
2989 if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
2991 /* Use the GOT PLT. */
2992 resolved_plt
= htab
->plt_got
;
2993 plt_offset
= eh
->plt_got
.offset
;
2995 else if (htab
->plt_second
!= NULL
)
2997 resolved_plt
= htab
->plt_second
;
2998 plt_offset
= eh
->plt_second
.offset
;
3002 resolved_plt
= htab
->elf
.splt
;
3003 plt_offset
= h
->plt
.offset
;
3006 relocation
= (resolved_plt
->output_section
->vma
3007 + resolved_plt
->output_offset
3009 unresolved_reloc
= FALSE
;
3012 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3013 + htab
->elf
.sgotplt
->output_offset
;
3016 case R_X86_64_PLT32
:
3017 case R_X86_64_PLT32_BND
:
3018 /* Relocation is to the entry for this symbol in the
3019 procedure linkage table. */
3021 /* Resolve a PLT32 reloc against a local symbol directly,
3022 without using the procedure linkage table. */
3026 if ((h
->plt
.offset
== (bfd_vma
) -1
3027 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3028 || htab
->elf
.splt
== NULL
)
3030 /* We didn't make a PLT entry for this symbol. This
3031 happens when statically linking PIC code, or when
3032 using -Bsymbolic. */
3037 if (h
->plt
.offset
!= (bfd_vma
) -1)
3039 if (htab
->plt_second
!= NULL
)
3041 resolved_plt
= htab
->plt_second
;
3042 plt_offset
= eh
->plt_second
.offset
;
3046 resolved_plt
= htab
->elf
.splt
;
3047 plt_offset
= h
->plt
.offset
;
3052 /* Use the GOT PLT. */
3053 resolved_plt
= htab
->plt_got
;
3054 plt_offset
= eh
->plt_got
.offset
;
3057 relocation
= (resolved_plt
->output_section
->vma
3058 + resolved_plt
->output_offset
3060 unresolved_reloc
= FALSE
;
3063 case R_X86_64_SIZE32
:
3064 case R_X86_64_SIZE64
:
3065 /* Set to symbol size. */
3066 relocation
= st_size
;
3072 case R_X86_64_PC32_BND
:
3073 /* Don't complain about -fPIC if the symbol is undefined when
3074 building executable unless it is unresolved weak symbol,
3075 references a dynamic definition in PIE or -z nocopyreloc
3077 if ((input_section
->flags
& SEC_ALLOC
) != 0
3078 && (input_section
->flags
& SEC_READONLY
) != 0
3080 && ((bfd_link_executable (info
)
3081 && ((h
->root
.type
== bfd_link_hash_undefweak
3082 && !resolved_to_zero
)
3083 || (bfd_link_pie (info
)
3086 || ((info
->nocopyreloc
3087 || (eh
->def_protected
3088 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
3090 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))))
3091 || bfd_link_dll (info
)))
3093 bfd_boolean fail
= FALSE
;
3094 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3096 /* Symbol is referenced locally. Make sure it is
3098 fail
= !(h
->def_regular
|| ELF_COMMON_DEF_P (h
));
3100 else if (!(bfd_link_pie (info
)
3101 && (h
->needs_copy
|| eh
->needs_copy
)))
3103 /* Symbol doesn't need copy reloc and isn't referenced
3104 locally. Address of protected function may not be
3105 reachable at run-time. */
3106 fail
= (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3107 || (ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
3108 && h
->type
== STT_FUNC
));
3112 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3113 h
, NULL
, NULL
, howto
);
3115 /* Since x86-64 has PC-relative PLT, we can use PLT in PIE
3116 as function address. */
3118 && (input_section
->flags
& SEC_CODE
) == 0
3119 && bfd_link_pie (info
)
3120 && h
->type
== STT_FUNC
3131 /* FIXME: The ABI says the linker should make sure the value is
3132 the same when it's zeroextended to 64 bit. */
3135 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3138 need_copy_reloc_in_pie
= (bfd_link_pie (info
)
3143 == bfd_link_hash_undefined
))
3144 && (X86_PCREL_TYPE_P (r_type
)
3145 || X86_SIZE_TYPE_P (r_type
)));
3147 if (GENERATE_DYNAMIC_RELOCATION_P (info
, eh
, r_type
,
3148 need_copy_reloc_in_pie
,
3149 resolved_to_zero
, FALSE
))
3151 Elf_Internal_Rela outrel
;
3152 bfd_boolean skip
, relocate
;
3155 /* When generating a shared object, these relocations
3156 are copied into the output file to be resolved at run
3162 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3164 if (outrel
.r_offset
== (bfd_vma
) -1)
3166 else if (outrel
.r_offset
== (bfd_vma
) -2)
3167 skip
= TRUE
, relocate
= TRUE
;
3169 outrel
.r_offset
+= (input_section
->output_section
->vma
3170 + input_section
->output_offset
);
3173 memset (&outrel
, 0, sizeof outrel
);
3175 else if (COPY_INPUT_RELOC_P (info
, h
, r_type
))
3177 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3178 outrel
.r_addend
= rel
->r_addend
;
3182 /* This symbol is local, or marked to become local.
3183 When relocation overflow check is disabled, we
3184 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
3185 if (r_type
== htab
->pointer_r_type
3186 || (r_type
== R_X86_64_32
3187 && info
->no_reloc_overflow_check
))
3190 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3191 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3193 else if (r_type
== R_X86_64_64
3194 && !ABI_64_P (output_bfd
))
3197 outrel
.r_info
= htab
->r_info (0,
3198 R_X86_64_RELATIVE64
);
3199 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3200 /* Check addend overflow. */
3201 if ((outrel
.r_addend
& 0x80000000)
3202 != (rel
->r_addend
& 0x80000000))
3205 int addend
= rel
->r_addend
;
3206 if (h
&& h
->root
.root
.string
)
3207 name
= h
->root
.root
.string
;
3209 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3212 /* xgettext:c-format */
3213 (_("%pB: addend %s%#x in relocation %s against "
3214 "symbol `%s' at %#" PRIx64
3215 " in section `%pA' is out of range"),
3216 input_bfd
, addend
< 0 ? "-" : "", addend
,
3217 howto
->name
, name
, (uint64_t) rel
->r_offset
,
3219 bfd_set_error (bfd_error_bad_value
);
3227 if (bfd_is_abs_section (sec
))
3229 else if (sec
== NULL
|| sec
->owner
== NULL
)
3231 bfd_set_error (bfd_error_bad_value
);
3238 /* We are turning this relocation into one
3239 against a section symbol. It would be
3240 proper to subtract the symbol's value,
3241 osec->vma, from the emitted reloc addend,
3242 but ld.so expects buggy relocs. */
3243 osec
= sec
->output_section
;
3244 sindx
= elf_section_data (osec
)->dynindx
;
3247 asection
*oi
= htab
->elf
.text_index_section
;
3248 sindx
= elf_section_data (oi
)->dynindx
;
3250 BFD_ASSERT (sindx
!= 0);
3253 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3254 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3258 sreloc
= elf_section_data (input_section
)->sreloc
;
3260 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3262 r
= bfd_reloc_notsupported
;
3263 goto check_relocation_error
;
3266 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3268 /* If this reloc is against an external symbol, we do
3269 not want to fiddle with the addend. Otherwise, we
3270 need to include the symbol value so that it becomes
3271 an addend for the dynamic reloc. */
3278 case R_X86_64_TLSGD
:
3279 case R_X86_64_GOTPC32_TLSDESC
:
3280 case R_X86_64_TLSDESC_CALL
:
3281 case R_X86_64_GOTTPOFF
:
3282 tls_type
= GOT_UNKNOWN
;
3283 if (h
== NULL
&& local_got_offsets
)
3284 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
3286 tls_type
= elf_x86_hash_entry (h
)->tls_type
;
3288 r_type_tls
= r_type
;
3289 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3290 input_section
, contents
,
3291 symtab_hdr
, sym_hashes
,
3292 &r_type_tls
, tls_type
, rel
,
3293 relend
, h
, r_symndx
, TRUE
))
3296 if (r_type_tls
== R_X86_64_TPOFF32
)
3298 bfd_vma roff
= rel
->r_offset
;
3300 BFD_ASSERT (! unresolved_reloc
);
3302 if (r_type
== R_X86_64_TLSGD
)
3304 /* GD->LE transition. For 64bit, change
3305 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3306 .word 0x6666; rex64; call __tls_get_addr@PLT
3308 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3310 call *__tls_get_addr@GOTPCREL(%rip)
3311 which may be converted to
3312 addr32 call __tls_get_addr
3315 leaq foo@tpoff(%rax), %rax
3317 leaq foo@tlsgd(%rip), %rdi
3318 .word 0x6666; rex64; call __tls_get_addr@PLT
3320 leaq foo@tlsgd(%rip), %rdi
3322 call *__tls_get_addr@GOTPCREL(%rip)
3323 which may be converted to
3324 addr32 call __tls_get_addr
3327 leaq foo@tpoff(%rax), %rax
3328 For largepic, change:
3329 leaq foo@tlsgd(%rip), %rdi
3330 movabsq $__tls_get_addr@pltoff, %rax
3335 leaq foo@tpoff(%rax), %rax
3336 nopw 0x0(%rax,%rax,1) */
3338 if (ABI_64_P (output_bfd
))
3340 if (contents
[roff
+ 5] == 0xb8)
3342 memcpy (contents
+ roff
- 3,
3343 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
3344 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3348 memcpy (contents
+ roff
- 4,
3349 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3353 memcpy (contents
+ roff
- 3,
3354 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3356 bfd_put_32 (output_bfd
,
3357 elf_x86_64_tpoff (info
, relocation
),
3358 contents
+ roff
+ 8 + largepic
);
3359 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
3360 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
3365 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3367 /* GDesc -> LE transition.
3368 It's originally something like:
3369 leaq x@tlsdesc(%rip), %rax
3372 movl $x@tpoff, %rax. */
3374 unsigned int val
, type
;
3376 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3377 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3378 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
3379 contents
+ roff
- 3);
3380 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
3381 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3382 contents
+ roff
- 1);
3383 bfd_put_32 (output_bfd
,
3384 elf_x86_64_tpoff (info
, relocation
),
3388 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3390 /* GDesc -> LE transition.
3395 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3396 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3399 else if (r_type
== R_X86_64_GOTTPOFF
)
3401 /* IE->LE transition:
3402 For 64bit, originally it can be one of:
3403 movq foo@gottpoff(%rip), %reg
3404 addq foo@gottpoff(%rip), %reg
3407 leaq foo(%reg), %reg
3409 For 32bit, originally it can be one of:
3410 movq foo@gottpoff(%rip), %reg
3411 addl foo@gottpoff(%rip), %reg
3414 leal foo(%reg), %reg
3417 unsigned int val
, type
, reg
;
3420 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3423 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3424 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3430 bfd_put_8 (output_bfd
, 0x49,
3431 contents
+ roff
- 3);
3432 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3433 bfd_put_8 (output_bfd
, 0x41,
3434 contents
+ roff
- 3);
3435 bfd_put_8 (output_bfd
, 0xc7,
3436 contents
+ roff
- 2);
3437 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3438 contents
+ roff
- 1);
3442 /* addq/addl -> addq/addl - addressing with %rsp/%r12
3445 bfd_put_8 (output_bfd
, 0x49,
3446 contents
+ roff
- 3);
3447 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3448 bfd_put_8 (output_bfd
, 0x41,
3449 contents
+ roff
- 3);
3450 bfd_put_8 (output_bfd
, 0x81,
3451 contents
+ roff
- 2);
3452 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3453 contents
+ roff
- 1);
3457 /* addq/addl -> leaq/leal */
3459 bfd_put_8 (output_bfd
, 0x4d,
3460 contents
+ roff
- 3);
3461 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3462 bfd_put_8 (output_bfd
, 0x45,
3463 contents
+ roff
- 3);
3464 bfd_put_8 (output_bfd
, 0x8d,
3465 contents
+ roff
- 2);
3466 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
3467 contents
+ roff
- 1);
3469 bfd_put_32 (output_bfd
,
3470 elf_x86_64_tpoff (info
, relocation
),
3478 if (htab
->elf
.sgot
== NULL
)
3483 off
= h
->got
.offset
;
3484 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
3488 if (local_got_offsets
== NULL
)
3491 off
= local_got_offsets
[r_symndx
];
3492 offplt
= local_tlsdesc_gotents
[r_symndx
];
3499 Elf_Internal_Rela outrel
;
3503 if (htab
->elf
.srelgot
== NULL
)
3506 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3508 if (GOT_TLS_GDESC_P (tls_type
))
3510 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
3511 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
3512 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
3513 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3514 + htab
->elf
.sgotplt
->output_offset
3516 + htab
->sgotplt_jump_table_size
);
3517 sreloc
= htab
->elf
.srelplt
;
3519 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3521 outrel
.r_addend
= 0;
3522 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3525 sreloc
= htab
->elf
.srelgot
;
3527 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3528 + htab
->elf
.sgot
->output_offset
+ off
);
3530 if (GOT_TLS_GD_P (tls_type
))
3531 dr_type
= R_X86_64_DTPMOD64
;
3532 else if (GOT_TLS_GDESC_P (tls_type
))
3535 dr_type
= R_X86_64_TPOFF64
;
3537 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
3538 outrel
.r_addend
= 0;
3539 if ((dr_type
== R_X86_64_TPOFF64
3540 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
3541 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3542 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
3544 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3546 if (GOT_TLS_GD_P (tls_type
))
3550 BFD_ASSERT (! unresolved_reloc
);
3551 bfd_put_64 (output_bfd
,
3552 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3553 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3557 bfd_put_64 (output_bfd
, 0,
3558 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3559 outrel
.r_info
= htab
->r_info (indx
,
3561 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
3562 elf_append_rela (output_bfd
, sreloc
,
3571 local_got_offsets
[r_symndx
] |= 1;
3574 if (off
>= (bfd_vma
) -2
3575 && ! GOT_TLS_GDESC_P (tls_type
))
3577 if (r_type_tls
== r_type
)
3579 if (r_type
== R_X86_64_GOTPC32_TLSDESC
3580 || r_type
== R_X86_64_TLSDESC_CALL
)
3581 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3582 + htab
->elf
.sgotplt
->output_offset
3583 + offplt
+ htab
->sgotplt_jump_table_size
;
3585 relocation
= htab
->elf
.sgot
->output_section
->vma
3586 + htab
->elf
.sgot
->output_offset
+ off
;
3587 unresolved_reloc
= FALSE
;
3591 bfd_vma roff
= rel
->r_offset
;
3593 if (r_type
== R_X86_64_TLSGD
)
3595 /* GD->IE transition. For 64bit, change
3596 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3597 .word 0x6666; rex64; call __tls_get_addr@PLT
3599 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3601 call *__tls_get_addr@GOTPCREL(%rip
3602 which may be converted to
3603 addr32 call __tls_get_addr
3606 addq foo@gottpoff(%rip), %rax
3608 leaq foo@tlsgd(%rip), %rdi
3609 .word 0x6666; rex64; call __tls_get_addr@PLT
3611 leaq foo@tlsgd(%rip), %rdi
3613 call *__tls_get_addr@GOTPCREL(%rip)
3614 which may be converted to
3615 addr32 call __tls_get_addr
3618 addq foo@gottpoff(%rip), %rax
3619 For largepic, change:
3620 leaq foo@tlsgd(%rip), %rdi
3621 movabsq $__tls_get_addr@pltoff, %rax
3626 addq foo@gottpoff(%rax), %rax
3627 nopw 0x0(%rax,%rax,1) */
3629 if (ABI_64_P (output_bfd
))
3631 if (contents
[roff
+ 5] == 0xb8)
3633 memcpy (contents
+ roff
- 3,
3634 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
3635 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3639 memcpy (contents
+ roff
- 4,
3640 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3644 memcpy (contents
+ roff
- 3,
3645 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3648 relocation
= (htab
->elf
.sgot
->output_section
->vma
3649 + htab
->elf
.sgot
->output_offset
+ off
3652 - input_section
->output_section
->vma
3653 - input_section
->output_offset
3655 bfd_put_32 (output_bfd
, relocation
,
3656 contents
+ roff
+ 8 + largepic
);
3657 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
3662 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3664 /* GDesc -> IE transition.
3665 It's originally something like:
3666 leaq x@tlsdesc(%rip), %rax
3669 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
3671 /* Now modify the instruction as appropriate. To
3672 turn a leaq into a movq in the form we use it, it
3673 suffices to change the second byte from 0x8d to
3675 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3677 bfd_put_32 (output_bfd
,
3678 htab
->elf
.sgot
->output_section
->vma
3679 + htab
->elf
.sgot
->output_offset
+ off
3681 - input_section
->output_section
->vma
3682 - input_section
->output_offset
3687 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3689 /* GDesc -> IE transition.
3696 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3697 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3705 case R_X86_64_TLSLD
:
3706 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3707 input_section
, contents
,
3708 symtab_hdr
, sym_hashes
,
3709 &r_type
, GOT_UNKNOWN
, rel
,
3710 relend
, h
, r_symndx
, TRUE
))
3713 if (r_type
!= R_X86_64_TLSLD
)
3715 /* LD->LE transition:
3716 leaq foo@tlsld(%rip), %rdi
3717 call __tls_get_addr@PLT
3718 For 64bit, we change it into:
3719 .word 0x6666; .byte 0x66; movq %fs:0, %rax
3720 For 32bit, we change it into:
3721 nopl 0x0(%rax); movl %fs:0, %eax
3723 leaq foo@tlsld(%rip), %rdi;
3724 call *__tls_get_addr@GOTPCREL(%rip)
3725 which may be converted to
3726 addr32 call __tls_get_addr
3727 For 64bit, we change it into:
3728 .word 0x6666; .word 0x6666; movq %fs:0, %rax
3729 For 32bit, we change it into:
3730 nopw 0x0(%rax); movl %fs:0, %eax
3731 For largepic, change:
3732 leaq foo@tlsgd(%rip), %rdi
3733 movabsq $__tls_get_addr@pltoff, %rax
3737 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
3740 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
3741 if (ABI_64_P (output_bfd
))
3743 if (contents
[rel
->r_offset
+ 5] == 0xb8)
3744 memcpy (contents
+ rel
->r_offset
- 3,
3745 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
3746 "\x64\x48\x8b\x04\x25\0\0\0", 22);
3747 else if (contents
[rel
->r_offset
+ 4] == 0xff
3748 || contents
[rel
->r_offset
+ 4] == 0x67)
3749 memcpy (contents
+ rel
->r_offset
- 3,
3750 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
3753 memcpy (contents
+ rel
->r_offset
- 3,
3754 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3758 if (contents
[rel
->r_offset
+ 4] == 0xff)
3759 memcpy (contents
+ rel
->r_offset
- 3,
3760 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
3763 memcpy (contents
+ rel
->r_offset
- 3,
3764 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
3766 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
3767 and R_X86_64_PLTOFF64. */
3773 if (htab
->elf
.sgot
== NULL
)
3776 off
= htab
->tls_ld_or_ldm_got
.offset
;
3781 Elf_Internal_Rela outrel
;
3783 if (htab
->elf
.srelgot
== NULL
)
3786 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3787 + htab
->elf
.sgot
->output_offset
+ off
);
3789 bfd_put_64 (output_bfd
, 0,
3790 htab
->elf
.sgot
->contents
+ off
);
3791 bfd_put_64 (output_bfd
, 0,
3792 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3793 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
3794 outrel
.r_addend
= 0;
3795 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
3797 htab
->tls_ld_or_ldm_got
.offset
|= 1;
3799 relocation
= htab
->elf
.sgot
->output_section
->vma
3800 + htab
->elf
.sgot
->output_offset
+ off
;
3801 unresolved_reloc
= FALSE
;
3804 case R_X86_64_DTPOFF32
:
3805 if (!bfd_link_executable (info
)
3806 || (input_section
->flags
& SEC_CODE
) == 0)
3807 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3809 relocation
= elf_x86_64_tpoff (info
, relocation
);
3812 case R_X86_64_TPOFF32
:
3813 case R_X86_64_TPOFF64
:
3814 BFD_ASSERT (bfd_link_executable (info
));
3815 relocation
= elf_x86_64_tpoff (info
, relocation
);
3818 case R_X86_64_DTPOFF64
:
3819 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
3820 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3827 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3828 because such sections are not SEC_ALLOC and thus ld.so will
3829 not process them. */
3830 if (unresolved_reloc
3831 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3833 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3834 rel
->r_offset
) != (bfd_vma
) -1)
3839 sec
= h
->root
.u
.def
.section
;
3840 if ((info
->nocopyreloc
3841 || (eh
->def_protected
3842 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
3843 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))
3844 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3845 h
, NULL
, NULL
, howto
);
3850 /* xgettext:c-format */
3851 (_("%pB(%pA+%#" PRIx64
"): "
3852 "unresolvable %s relocation against symbol `%s'"),
3855 (uint64_t) rel
->r_offset
,
3857 h
->root
.root
.string
);
3863 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3864 contents
, rel
->r_offset
,
3865 relocation
, rel
->r_addend
);
3867 check_relocation_error
:
3868 if (r
!= bfd_reloc_ok
)
3873 name
= h
->root
.root
.string
;
3876 name
= bfd_elf_string_from_elf_section (input_bfd
,
3877 symtab_hdr
->sh_link
,
3882 name
= bfd_section_name (input_bfd
, sec
);
3885 if (r
== bfd_reloc_overflow
)
3887 if (converted_reloc
)
3889 info
->callbacks
->einfo
3890 (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n"));
3893 (*info
->callbacks
->reloc_overflow
)
3894 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3895 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3900 /* xgettext:c-format */
3901 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
3902 input_bfd
, input_section
,
3903 (uint64_t) rel
->r_offset
, name
, (int) r
);
3914 Elf_Internal_Shdr
*rel_hdr
;
3915 size_t deleted
= rel
- wrel
;
3917 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
3918 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3919 if (rel_hdr
->sh_size
== 0)
3921 /* It is too late to remove an empty reloc section. Leave
3923 ??? What is wrong with an empty section??? */
3924 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
3927 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
3928 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3929 input_section
->reloc_count
-= deleted
;
3935 /* Finish up dynamic symbol handling. We set the contents of various
3936 dynamic sections here. */
3939 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
3940 struct bfd_link_info
*info
,
3941 struct elf_link_hash_entry
*h
,
3942 Elf_Internal_Sym
*sym
)
3944 struct elf_x86_link_hash_table
*htab
;
3945 bfd_boolean use_plt_second
;
3946 struct elf_x86_link_hash_entry
*eh
;
3947 bfd_boolean local_undefweak
;
3949 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
3953 /* Use the second PLT section only if there is .plt section. */
3954 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
3956 eh
= (struct elf_x86_link_hash_entry
*) h
;
3957 if (eh
->no_finish_dynamic_symbol
)
3960 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3961 resolved undefined weak symbols in executable so that their
3962 references have value 0 at run-time. */
3963 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
3965 if (h
->plt
.offset
!= (bfd_vma
) -1)
3968 bfd_vma got_offset
, plt_offset
;
3969 Elf_Internal_Rela rela
;
3971 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
3972 const struct elf_backend_data
*bed
;
3973 bfd_vma plt_got_pcrel_offset
;
3975 /* When building a static executable, use .iplt, .igot.plt and
3976 .rela.iplt sections for STT_GNU_IFUNC symbols. */
3977 if (htab
->elf
.splt
!= NULL
)
3979 plt
= htab
->elf
.splt
;
3980 gotplt
= htab
->elf
.sgotplt
;
3981 relplt
= htab
->elf
.srelplt
;
3985 plt
= htab
->elf
.iplt
;
3986 gotplt
= htab
->elf
.igotplt
;
3987 relplt
= htab
->elf
.irelplt
;
3990 VERIFY_PLT_ENTRY (info
, h
, plt
, gotplt
, relplt
, local_undefweak
)
3992 /* Get the index in the procedure linkage table which
3993 corresponds to this symbol. This is the index of this symbol
3994 in all the symbols for which we are making plt entries. The
3995 first entry in the procedure linkage table is reserved.
3997 Get the offset into the .got table of the entry that
3998 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
3999 bytes. The first three are reserved for the dynamic linker.
4001 For static executables, we don't reserve anything. */
4003 if (plt
== htab
->elf
.splt
)
4005 got_offset
= (h
->plt
.offset
/ htab
->plt
.plt_entry_size
4006 - htab
->plt
.has_plt0
);
4007 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4011 got_offset
= h
->plt
.offset
/ htab
->plt
.plt_entry_size
;
4012 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4015 /* Fill in the entry in the procedure linkage table. */
4016 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
4017 htab
->plt
.plt_entry_size
);
4020 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
4021 htab
->non_lazy_plt
->plt_entry
,
4022 htab
->non_lazy_plt
->plt_entry_size
);
4024 resolved_plt
= htab
->plt_second
;
4025 plt_offset
= eh
->plt_second
.offset
;
4030 plt_offset
= h
->plt
.offset
;
4033 /* Insert the relocation positions of the plt section. */
4035 /* Put offset the PC-relative instruction referring to the GOT entry,
4036 subtracting the size of that instruction. */
4037 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
4038 + gotplt
->output_offset
4040 - resolved_plt
->output_section
->vma
4041 - resolved_plt
->output_offset
4043 - htab
->plt
.plt_got_insn_size
);
4045 /* Check PC-relative offset overflow in PLT entry. */
4046 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
4047 /* xgettext:c-format */
4048 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"),
4049 output_bfd
, h
->root
.root
.string
);
4051 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
4052 (resolved_plt
->contents
+ plt_offset
4053 + htab
->plt
.plt_got_offset
));
4055 /* Fill in the entry in the global offset table, initially this
4056 points to the second part of the PLT entry. Leave the entry
4057 as zero for undefined weak symbol in PIE. No PLT relocation
4058 against undefined weak symbol in PIE. */
4059 if (!local_undefweak
)
4061 if (htab
->plt
.has_plt0
)
4062 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4063 + plt
->output_offset
4065 + htab
->lazy_plt
->plt_lazy_offset
),
4066 gotplt
->contents
+ got_offset
);
4068 /* Fill in the entry in the .rela.plt section. */
4069 rela
.r_offset
= (gotplt
->output_section
->vma
4070 + gotplt
->output_offset
4072 if (PLT_LOCAL_IFUNC_P (info
, h
))
4074 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4075 h
->root
.root
.string
,
4076 h
->root
.u
.def
.section
->owner
);
4078 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4079 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4080 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4081 rela
.r_addend
= (h
->root
.u
.def
.value
4082 + h
->root
.u
.def
.section
->output_section
->vma
4083 + h
->root
.u
.def
.section
->output_offset
);
4084 /* R_X86_64_IRELATIVE comes last. */
4085 plt_index
= htab
->next_irelative_index
--;
4089 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4091 plt_index
= htab
->next_jump_slot_index
++;
4094 /* Don't fill the second and third slots in PLT entry for
4095 static executables nor without PLT0. */
4096 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
4099 = h
->plt
.offset
+ htab
->lazy_plt
->plt_plt_insn_end
;
4101 /* Put relocation index. */
4102 bfd_put_32 (output_bfd
, plt_index
,
4103 (plt
->contents
+ h
->plt
.offset
4104 + htab
->lazy_plt
->plt_reloc_offset
));
4106 /* Put offset for jmp .PLT0 and check for overflow. We don't
4107 check relocation index for overflow since branch displacement
4108 will overflow first. */
4109 if (plt0_offset
> 0x80000000)
4110 /* xgettext:c-format */
4111 info
->callbacks
->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"),
4112 output_bfd
, h
->root
.root
.string
);
4113 bfd_put_32 (output_bfd
, - plt0_offset
,
4114 (plt
->contents
+ h
->plt
.offset
4115 + htab
->lazy_plt
->plt_plt_offset
));
4118 bed
= get_elf_backend_data (output_bfd
);
4119 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4120 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4123 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4125 bfd_vma got_offset
, plt_offset
;
4126 asection
*plt
, *got
;
4127 bfd_boolean got_after_plt
;
4128 int32_t got_pcrel_offset
;
4130 /* Set the entry in the GOT procedure linkage table. */
4131 plt
= htab
->plt_got
;
4132 got
= htab
->elf
.sgot
;
4133 got_offset
= h
->got
.offset
;
4135 if (got_offset
== (bfd_vma
) -1
4136 || (h
->type
== STT_GNU_IFUNC
&& h
->def_regular
)
4141 /* Use the non-lazy PLT entry template for the GOT PLT since they
4142 are the identical. */
4143 /* Fill in the entry in the GOT procedure linkage table. */
4144 plt_offset
= eh
->plt_got
.offset
;
4145 memcpy (plt
->contents
+ plt_offset
,
4146 htab
->non_lazy_plt
->plt_entry
,
4147 htab
->non_lazy_plt
->plt_entry_size
);
4149 /* Put offset the PC-relative instruction referring to the GOT
4150 entry, subtracting the size of that instruction. */
4151 got_pcrel_offset
= (got
->output_section
->vma
4152 + got
->output_offset
4154 - plt
->output_section
->vma
4155 - plt
->output_offset
4157 - htab
->non_lazy_plt
->plt_got_insn_size
);
4159 /* Check PC-relative offset overflow in GOT PLT entry. */
4160 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
4161 if ((got_after_plt
&& got_pcrel_offset
< 0)
4162 || (!got_after_plt
&& got_pcrel_offset
> 0))
4163 /* xgettext:c-format */
4164 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
4165 output_bfd
, h
->root
.root
.string
);
4167 bfd_put_32 (output_bfd
, got_pcrel_offset
,
4168 (plt
->contents
+ plt_offset
4169 + htab
->non_lazy_plt
->plt_got_offset
));
4172 if (!local_undefweak
4174 && (h
->plt
.offset
!= (bfd_vma
) -1
4175 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4177 /* Mark the symbol as undefined, rather than as defined in
4178 the .plt section. Leave the value if there were any
4179 relocations where pointer equality matters (this is a clue
4180 for the dynamic linker, to make function pointer
4181 comparisons work between an application and shared
4182 library), otherwise set it to zero. If a function is only
4183 called from a binary, there is no need to slow down
4184 shared libraries because of that. */
4185 sym
->st_shndx
= SHN_UNDEF
;
4186 if (!h
->pointer_equality_needed
)
4190 _bfd_x86_elf_link_fixup_ifunc_symbol (info
, htab
, h
, sym
);
4192 /* Don't generate dynamic GOT relocation against undefined weak
4193 symbol in executable. */
4194 if (h
->got
.offset
!= (bfd_vma
) -1
4195 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h
)->tls_type
)
4196 && elf_x86_hash_entry (h
)->tls_type
!= GOT_TLS_IE
4197 && !local_undefweak
)
4199 Elf_Internal_Rela rela
;
4200 asection
*relgot
= htab
->elf
.srelgot
;
4202 /* This symbol has an entry in the global offset table. Set it
4204 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4207 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4208 + htab
->elf
.sgot
->output_offset
4209 + (h
->got
.offset
&~ (bfd_vma
) 1));
4211 /* If this is a static link, or it is a -Bsymbolic link and the
4212 symbol is defined locally or was forced to be local because
4213 of a version file, we just want to emit a RELATIVE reloc.
4214 The entry in the global offset table will already have been
4215 initialized in the relocate_section function. */
4217 && h
->type
== STT_GNU_IFUNC
)
4219 if (h
->plt
.offset
== (bfd_vma
) -1)
4221 /* STT_GNU_IFUNC is referenced without PLT. */
4222 if (htab
->elf
.splt
== NULL
)
4224 /* use .rel[a].iplt section to store .got relocations
4225 in static executable. */
4226 relgot
= htab
->elf
.irelplt
;
4228 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4230 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4231 h
->root
.root
.string
,
4232 h
->root
.u
.def
.section
->owner
);
4234 rela
.r_info
= htab
->r_info (0,
4235 R_X86_64_IRELATIVE
);
4236 rela
.r_addend
= (h
->root
.u
.def
.value
4237 + h
->root
.u
.def
.section
->output_section
->vma
4238 + h
->root
.u
.def
.section
->output_offset
);
4243 else if (bfd_link_pic (info
))
4245 /* Generate R_X86_64_GLOB_DAT. */
4253 if (!h
->pointer_equality_needed
)
4256 /* For non-shared object, we can't use .got.plt, which
4257 contains the real function addres if we need pointer
4258 equality. We load the GOT entry with the PLT entry. */
4259 if (htab
->plt_second
!= NULL
)
4261 plt
= htab
->plt_second
;
4262 plt_offset
= eh
->plt_second
.offset
;
4266 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4267 plt_offset
= h
->plt
.offset
;
4269 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4270 + plt
->output_offset
4272 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4276 else if (bfd_link_pic (info
)
4277 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4279 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
4281 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4282 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4283 rela
.r_addend
= (h
->root
.u
.def
.value
4284 + h
->root
.u
.def
.section
->output_section
->vma
4285 + h
->root
.u
.def
.section
->output_offset
);
4289 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4291 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4292 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4293 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4297 elf_append_rela (output_bfd
, relgot
, &rela
);
4302 Elf_Internal_Rela rela
;
4305 /* This symbol needs a copy reloc. Set it up. */
4306 VERIFY_COPY_RELOC (h
, htab
)
4308 rela
.r_offset
= (h
->root
.u
.def
.value
4309 + h
->root
.u
.def
.section
->output_section
->vma
4310 + h
->root
.u
.def
.section
->output_offset
);
4311 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4313 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
4314 s
= htab
->elf
.sreldynrelro
;
4316 s
= htab
->elf
.srelbss
;
4317 elf_append_rela (output_bfd
, s
, &rela
);
4323 /* Finish up local dynamic symbol handling. We set the contents of
4324 various dynamic sections here. */
4327 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4329 struct elf_link_hash_entry
*h
4330 = (struct elf_link_hash_entry
*) *slot
;
4331 struct bfd_link_info
*info
4332 = (struct bfd_link_info
*) inf
;
4334 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4338 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4339 here since undefined weak symbol may not be dynamic and may not be
4340 called for elf_x86_64_finish_dynamic_symbol. */
4343 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
4346 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
4347 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
4349 if (h
->root
.type
!= bfd_link_hash_undefweak
4350 || h
->dynindx
!= -1)
4353 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4357 /* Used to decide how to sort relocs in an optimal manner for the
4358 dynamic linker, before writing them out. */
4360 static enum elf_reloc_type_class
4361 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info
,
4362 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4363 const Elf_Internal_Rela
*rela
)
4365 bfd
*abfd
= info
->output_bfd
;
4366 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4367 struct elf_x86_link_hash_table
*htab
4368 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4370 if (htab
->elf
.dynsym
!= NULL
4371 && htab
->elf
.dynsym
->contents
!= NULL
)
4373 /* Check relocation against STT_GNU_IFUNC symbol if there are
4375 unsigned long r_symndx
= htab
->r_sym (rela
->r_info
);
4376 if (r_symndx
!= STN_UNDEF
)
4378 Elf_Internal_Sym sym
;
4379 if (!bed
->s
->swap_symbol_in (abfd
,
4380 (htab
->elf
.dynsym
->contents
4381 + r_symndx
* bed
->s
->sizeof_sym
),
4385 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
4386 return reloc_class_ifunc
;
4390 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4392 case R_X86_64_IRELATIVE
:
4393 return reloc_class_ifunc
;
4394 case R_X86_64_RELATIVE
:
4395 case R_X86_64_RELATIVE64
:
4396 return reloc_class_relative
;
4397 case R_X86_64_JUMP_SLOT
:
4398 return reloc_class_plt
;
4400 return reloc_class_copy
;
4402 return reloc_class_normal
;
4406 /* Finish up the dynamic sections. */
4409 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4410 struct bfd_link_info
*info
)
4412 struct elf_x86_link_hash_table
*htab
;
4414 htab
= _bfd_x86_elf_finish_dynamic_sections (output_bfd
, info
);
4418 if (! htab
->elf
.dynamic_sections_created
)
4421 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4423 elf_section_data (htab
->elf
.splt
->output_section
)
4424 ->this_hdr
.sh_entsize
= htab
->plt
.plt_entry_size
;
4426 if (htab
->plt
.has_plt0
)
4428 /* Fill in the special first entry in the procedure linkage
4430 memcpy (htab
->elf
.splt
->contents
,
4431 htab
->lazy_plt
->plt0_entry
,
4432 htab
->lazy_plt
->plt0_entry_size
);
4433 /* Add offset for pushq GOT+8(%rip), since the instruction
4434 uses 6 bytes subtract this value. */
4435 bfd_put_32 (output_bfd
,
4436 (htab
->elf
.sgotplt
->output_section
->vma
4437 + htab
->elf
.sgotplt
->output_offset
4439 - htab
->elf
.splt
->output_section
->vma
4440 - htab
->elf
.splt
->output_offset
4442 (htab
->elf
.splt
->contents
4443 + htab
->lazy_plt
->plt0_got1_offset
));
4444 /* Add offset for the PC-relative instruction accessing
4445 GOT+16, subtracting the offset to the end of that
4447 bfd_put_32 (output_bfd
,
4448 (htab
->elf
.sgotplt
->output_section
->vma
4449 + htab
->elf
.sgotplt
->output_offset
4451 - htab
->elf
.splt
->output_section
->vma
4452 - htab
->elf
.splt
->output_offset
4453 - htab
->lazy_plt
->plt0_got2_insn_end
),
4454 (htab
->elf
.splt
->contents
4455 + htab
->lazy_plt
->plt0_got2_offset
));
4458 if (htab
->tlsdesc_plt
)
4460 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4461 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
4463 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
4464 htab
->lazy_plt
->plt_tlsdesc_entry
,
4465 htab
->lazy_plt
->plt_tlsdesc_entry_size
);
4467 /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4
4468 bytes and the instruction uses 6 bytes, subtract these
4470 bfd_put_32 (output_bfd
,
4471 (htab
->elf
.sgotplt
->output_section
->vma
4472 + htab
->elf
.sgotplt
->output_offset
4474 - htab
->elf
.splt
->output_section
->vma
4475 - htab
->elf
.splt
->output_offset
4477 - htab
->lazy_plt
->plt_tlsdesc_got1_insn_end
),
4478 (htab
->elf
.splt
->contents
4480 + htab
->lazy_plt
->plt_tlsdesc_got1_offset
));
4481 /* Add offset for indirect branch via GOT+TDG, where TDG
4482 stands for htab->tlsdesc_got, subtracting the offset
4483 to the end of that instruction. */
4484 bfd_put_32 (output_bfd
,
4485 (htab
->elf
.sgot
->output_section
->vma
4486 + htab
->elf
.sgot
->output_offset
4488 - htab
->elf
.splt
->output_section
->vma
4489 - htab
->elf
.splt
->output_offset
4491 - htab
->lazy_plt
->plt_tlsdesc_got2_insn_end
),
4492 (htab
->elf
.splt
->contents
4494 + htab
->lazy_plt
->plt_tlsdesc_got2_offset
));
4498 /* Fill PLT entries for undefined weak symbols in PIE. */
4499 if (bfd_link_pie (info
))
4500 bfd_hash_traverse (&info
->hash
->table
,
4501 elf_x86_64_pie_finish_undefweak_symbol
,
4507 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4508 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4509 It has to be done before elf_link_sort_relocs is called so that
4510 dynamic relocations are properly sorted. */
4513 elf_x86_64_output_arch_local_syms
4514 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4515 struct bfd_link_info
*info
,
4516 void *flaginfo ATTRIBUTE_UNUSED
,
4517 int (*func
) (void *, const char *,
4520 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
4522 struct elf_x86_link_hash_table
*htab
4523 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4527 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4528 htab_traverse (htab
->loc_hash_table
,
4529 elf_x86_64_finish_local_dynamic_symbol
,
4535 /* Forward declaration. */
4536 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
;
4538 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4539 dynamic relocations. */
4542 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
4543 long symcount ATTRIBUTE_UNUSED
,
4544 asymbol
**syms ATTRIBUTE_UNUSED
,
4551 bfd_byte
*plt_contents
;
4553 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
4554 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
4555 const struct elf_x86_lazy_plt_layout
*lazy_bnd_plt
;
4556 const struct elf_x86_non_lazy_plt_layout
*non_lazy_bnd_plt
;
4557 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
4558 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
4560 enum elf_x86_plt_type plt_type
;
4561 struct elf_x86_plt plts
[] =
4563 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
4564 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
4565 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4566 { ".plt.bnd", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4567 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
4572 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
4575 if (dynsymcount
<= 0)
4578 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
4582 if (get_elf_x86_backend_data (abfd
)->target_os
!= is_nacl
)
4584 lazy_plt
= &elf_x86_64_lazy_plt
;
4585 non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
4586 lazy_bnd_plt
= &elf_x86_64_lazy_bnd_plt
;
4587 non_lazy_bnd_plt
= &elf_x86_64_non_lazy_bnd_plt
;
4588 if (ABI_64_P (abfd
))
4590 lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
4591 non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
4595 lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
4596 non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
4601 lazy_plt
= &elf_x86_64_nacl_plt
;
4602 non_lazy_plt
= NULL
;
4603 lazy_bnd_plt
= NULL
;
4604 non_lazy_bnd_plt
= NULL
;
4605 lazy_ibt_plt
= NULL
;
4606 non_lazy_ibt_plt
= NULL
;
4610 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
4612 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
4613 if (plt
== NULL
|| plt
->size
== 0)
4616 /* Get the PLT section contents. */
4617 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
4618 if (plt_contents
== NULL
)
4620 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
4621 plt_contents
, 0, plt
->size
))
4623 free (plt_contents
);
4627 /* Check what kind of PLT it is. */
4628 plt_type
= plt_unknown
;
4629 if (plts
[j
].type
== plt_unknown
4630 && (plt
->size
>= (lazy_plt
->plt_entry_size
4631 + lazy_plt
->plt_entry_size
)))
4633 /* Match lazy PLT first. Need to check the first two
4635 if ((memcmp (plt_contents
, lazy_plt
->plt0_entry
,
4636 lazy_plt
->plt0_got1_offset
) == 0)
4637 && (memcmp (plt_contents
+ 6, lazy_plt
->plt0_entry
+ 6,
4639 plt_type
= plt_lazy
;
4640 else if (lazy_bnd_plt
!= NULL
4641 && (memcmp (plt_contents
, lazy_bnd_plt
->plt0_entry
,
4642 lazy_bnd_plt
->plt0_got1_offset
) == 0)
4643 && (memcmp (plt_contents
+ 6,
4644 lazy_bnd_plt
->plt0_entry
+ 6, 3) == 0))
4646 plt_type
= plt_lazy
| plt_second
;
4647 /* The fist entry in the lazy IBT PLT is the same as the
4649 if ((memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
4650 lazy_ibt_plt
->plt_entry
,
4651 lazy_ibt_plt
->plt_got_offset
) == 0))
4652 lazy_plt
= lazy_ibt_plt
;
4654 lazy_plt
= lazy_bnd_plt
;
4658 if (non_lazy_plt
!= NULL
4659 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
4660 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
4662 /* Match non-lazy PLT. */
4663 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
4664 non_lazy_plt
->plt_got_offset
) == 0)
4665 plt_type
= plt_non_lazy
;
4668 if (plt_type
== plt_unknown
|| plt_type
== plt_second
)
4670 if (non_lazy_bnd_plt
!= NULL
4671 && plt
->size
>= non_lazy_bnd_plt
->plt_entry_size
4672 && (memcmp (plt_contents
, non_lazy_bnd_plt
->plt_entry
,
4673 non_lazy_bnd_plt
->plt_got_offset
) == 0))
4675 /* Match BND PLT. */
4676 plt_type
= plt_second
;
4677 non_lazy_plt
= non_lazy_bnd_plt
;
4679 else if (non_lazy_ibt_plt
!= NULL
4680 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
4681 && (memcmp (plt_contents
,
4682 non_lazy_ibt_plt
->plt_entry
,
4683 non_lazy_ibt_plt
->plt_got_offset
) == 0))
4685 /* Match IBT PLT. */
4686 plt_type
= plt_second
;
4687 non_lazy_plt
= non_lazy_ibt_plt
;
4691 if (plt_type
== plt_unknown
)
4693 free (plt_contents
);
4698 plts
[j
].type
= plt_type
;
4700 if ((plt_type
& plt_lazy
))
4702 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
4703 plts
[j
].plt_got_insn_size
= lazy_plt
->plt_got_insn_size
;
4704 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
4705 /* Skip PLT0 in lazy PLT. */
4710 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
4711 plts
[j
].plt_got_insn_size
= non_lazy_plt
->plt_got_insn_size
;
4712 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
4716 /* Skip lazy PLT when the second PLT is used. */
4717 if (plt_type
== (plt_lazy
| plt_second
))
4721 n
= plt
->size
/ plts
[j
].plt_entry_size
;
4726 plts
[j
].contents
= plt_contents
;
4729 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
4730 (bfd_vma
) 0, plts
, dynsyms
,
4734 /* Handle an x86-64 specific section when reading an object file. This
4735 is called when elfcode.h finds a section with an unknown type. */
4738 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
4739 const char *name
, int shindex
)
4741 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4744 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4750 /* Hook called by the linker routine which adds symbols from an object
4751 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4755 elf_x86_64_add_symbol_hook (bfd
*abfd
,
4756 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4757 Elf_Internal_Sym
*sym
,
4758 const char **namep ATTRIBUTE_UNUSED
,
4759 flagword
*flagsp ATTRIBUTE_UNUSED
,
4765 switch (sym
->st_shndx
)
4767 case SHN_X86_64_LCOMMON
:
4768 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
4771 lcomm
= bfd_make_section_with_flags (abfd
,
4775 | SEC_LINKER_CREATED
));
4778 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
4781 *valp
= sym
->st_size
;
4789 /* Given a BFD section, try to locate the corresponding ELF section
4793 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
4794 asection
*sec
, int *index_return
)
4796 if (sec
== &_bfd_elf_large_com_section
)
4798 *index_return
= SHN_X86_64_LCOMMON
;
4804 /* Process a symbol. */
4807 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
4810 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
4812 switch (elfsym
->internal_elf_sym
.st_shndx
)
4814 case SHN_X86_64_LCOMMON
:
4815 asym
->section
= &_bfd_elf_large_com_section
;
4816 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
4817 /* Common symbol doesn't set BSF_GLOBAL. */
4818 asym
->flags
&= ~BSF_GLOBAL
;
4824 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
4826 return (sym
->st_shndx
== SHN_COMMON
4827 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
4831 elf_x86_64_common_section_index (asection
*sec
)
4833 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
4836 return SHN_X86_64_LCOMMON
;
4840 elf_x86_64_common_section (asection
*sec
)
4842 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
4843 return bfd_com_section_ptr
;
4845 return &_bfd_elf_large_com_section
;
4849 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
4850 const Elf_Internal_Sym
*sym
,
4855 const asection
*oldsec
)
4857 /* A normal common symbol and a large common symbol result in a
4858 normal common symbol. We turn the large common symbol into a
4861 && h
->root
.type
== bfd_link_hash_common
4863 && bfd_is_com_section (*psec
)
4866 if (sym
->st_shndx
== SHN_COMMON
4867 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
4869 h
->root
.u
.c
.p
->section
4870 = bfd_make_section_old_way (oldbfd
, "COMMON");
4871 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
4873 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
4874 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
4875 *psec
= bfd_com_section_ptr
;
4882 elf_x86_64_additional_program_headers (bfd
*abfd
,
4883 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
4888 /* Check to see if we need a large readonly segment. */
4889 s
= bfd_get_section_by_name (abfd
, ".lrodata");
4890 if (s
&& (s
->flags
& SEC_LOAD
))
4893 /* Check to see if we need a large data segment. Since .lbss sections
4894 is placed right after the .bss section, there should be no need for
4895 a large data segment just because of .lbss. */
4896 s
= bfd_get_section_by_name (abfd
, ".ldata");
4897 if (s
&& (s
->flags
& SEC_LOAD
))
4903 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
4906 elf_x86_64_relocs_compatible (const bfd_target
*input
,
4907 const bfd_target
*output
)
4909 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
4910 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
4911 && _bfd_elf_relocs_compatible (input
, output
));
4914 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
4915 with GNU properties if found. Otherwise, return NULL. */
4918 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info
*info
)
4920 struct elf_x86_init_table init_table
;
4922 if ((int) R_X86_64_standard
>= (int) R_X86_64_converted_reloc_bit
4923 || (int) R_X86_64_max
<= (int) R_X86_64_converted_reloc_bit
4924 || ((int) (R_X86_64_GNU_VTINHERIT
| R_X86_64_converted_reloc_bit
)
4925 != (int) R_X86_64_GNU_VTINHERIT
)
4926 || ((int) (R_X86_64_GNU_VTENTRY
| R_X86_64_converted_reloc_bit
)
4927 != (int) R_X86_64_GNU_VTENTRY
))
4930 /* This is unused for x86-64. */
4931 init_table
.plt0_pad_byte
= 0x90;
4933 if (get_elf_x86_backend_data (info
->output_bfd
)->target_os
!= is_nacl
)
4937 init_table
.lazy_plt
= &elf_x86_64_lazy_bnd_plt
;
4938 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_bnd_plt
;
4942 init_table
.lazy_plt
= &elf_x86_64_lazy_plt
;
4943 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
4946 if (ABI_64_P (info
->output_bfd
))
4948 init_table
.lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
4949 init_table
.non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
4953 init_table
.lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
4954 init_table
.non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
4959 init_table
.lazy_plt
= &elf_x86_64_nacl_plt
;
4960 init_table
.non_lazy_plt
= NULL
;
4961 init_table
.lazy_ibt_plt
= NULL
;
4962 init_table
.non_lazy_ibt_plt
= NULL
;
4965 if (ABI_64_P (info
->output_bfd
))
4967 init_table
.r_info
= elf64_r_info
;
4968 init_table
.r_sym
= elf64_r_sym
;
4972 init_table
.r_info
= elf32_r_info
;
4973 init_table
.r_sym
= elf32_r_sym
;
4976 return _bfd_x86_elf_link_setup_gnu_properties (info
, &init_table
);
4979 static const struct bfd_elf_special_section
4980 elf_x86_64_special_sections
[]=
4982 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
4983 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
4984 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
4985 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
4986 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
4987 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
4988 { NULL
, 0, 0, 0, 0 }
4991 #define TARGET_LITTLE_SYM x86_64_elf64_vec
4992 #define TARGET_LITTLE_NAME "elf64-x86-64"
4993 #define ELF_ARCH bfd_arch_i386
4994 #define ELF_TARGET_ID X86_64_ELF_DATA
4995 #define ELF_MACHINE_CODE EM_X86_64
4996 #if DEFAULT_LD_Z_SEPARATE_CODE
4997 # define ELF_MAXPAGESIZE 0x1000
4999 # define ELF_MAXPAGESIZE 0x200000
5001 #define ELF_MINPAGESIZE 0x1000
5002 #define ELF_COMMONPAGESIZE 0x1000
5004 #define elf_backend_can_gc_sections 1
5005 #define elf_backend_can_refcount 1
5006 #define elf_backend_want_got_plt 1
5007 #define elf_backend_plt_readonly 1
5008 #define elf_backend_want_plt_sym 0
5009 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5010 #define elf_backend_rela_normal 1
5011 #define elf_backend_plt_alignment 4
5012 #define elf_backend_extern_protected_data 1
5013 #define elf_backend_caches_rawsize 1
5014 #define elf_backend_dtrel_excludes_plt 1
5015 #define elf_backend_want_dynrelro 1
5017 #define elf_info_to_howto elf_x86_64_info_to_howto
5019 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5020 #define bfd_elf64_bfd_reloc_name_lookup \
5021 elf_x86_64_reloc_name_lookup
5023 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5024 #define elf_backend_check_relocs elf_x86_64_check_relocs
5025 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5026 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5027 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5028 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
5029 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5030 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5032 #define elf_backend_write_core_note elf_x86_64_write_core_note
5034 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5035 #define elf_backend_relocate_section elf_x86_64_relocate_section
5036 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5037 #define elf_backend_object_p elf64_x86_64_elf_object_p
5038 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5040 #define elf_backend_section_from_shdr \
5041 elf_x86_64_section_from_shdr
5043 #define elf_backend_section_from_bfd_section \
5044 elf_x86_64_elf_section_from_bfd_section
5045 #define elf_backend_add_symbol_hook \
5046 elf_x86_64_add_symbol_hook
5047 #define elf_backend_symbol_processing \
5048 elf_x86_64_symbol_processing
5049 #define elf_backend_common_section_index \
5050 elf_x86_64_common_section_index
5051 #define elf_backend_common_section \
5052 elf_x86_64_common_section
5053 #define elf_backend_common_definition \
5054 elf_x86_64_common_definition
5055 #define elf_backend_merge_symbol \
5056 elf_x86_64_merge_symbol
5057 #define elf_backend_special_sections \
5058 elf_x86_64_special_sections
5059 #define elf_backend_additional_program_headers \
5060 elf_x86_64_additional_program_headers
5061 #define elf_backend_setup_gnu_properties \
5062 elf_x86_64_link_setup_gnu_properties
5063 #define elf_backend_hide_symbol \
5064 _bfd_x86_elf_hide_symbol
5067 #define elf64_bed elf64_x86_64_bed
5069 #include "elf64-target.h"
5071 /* CloudABI support. */
5073 #undef TARGET_LITTLE_SYM
5074 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5075 #undef TARGET_LITTLE_NAME
5076 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5079 #define ELF_OSABI ELFOSABI_CLOUDABI
5082 #define elf64_bed elf64_x86_64_cloudabi_bed
5084 #include "elf64-target.h"
5086 /* FreeBSD support. */
5088 #undef TARGET_LITTLE_SYM
5089 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5090 #undef TARGET_LITTLE_NAME
5091 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5094 #define ELF_OSABI ELFOSABI_FREEBSD
5097 #define elf64_bed elf64_x86_64_fbsd_bed
5099 #include "elf64-target.h"
5101 /* Solaris 2 support. */
5103 #undef TARGET_LITTLE_SYM
5104 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5105 #undef TARGET_LITTLE_NAME
5106 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5108 static const struct elf_x86_backend_data elf_x86_64_solaris_arch_bed
=
5113 #undef elf_backend_arch_data
5114 #define elf_backend_arch_data &elf_x86_64_solaris_arch_bed
5116 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5117 objects won't be recognized. */
5121 #define elf64_bed elf64_x86_64_sol2_bed
5123 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5125 #undef elf_backend_static_tls_alignment
5126 #define elf_backend_static_tls_alignment 16
5128 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5130 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5132 #undef elf_backend_want_plt_sym
5133 #define elf_backend_want_plt_sym 1
5135 #undef elf_backend_strtab_flags
5136 #define elf_backend_strtab_flags SHF_STRINGS
5139 elf64_x86_64_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
5140 bfd
*obfd ATTRIBUTE_UNUSED
,
5141 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
5142 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
5144 /* PR 19938: FIXME: Need to add code for setting the sh_info
5145 and sh_link fields of Solaris specific section types. */
5149 #undef elf_backend_copy_special_section_fields
5150 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
5152 #include "elf64-target.h"
5154 /* Native Client support. */
5157 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
5159 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5160 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
5164 #undef TARGET_LITTLE_SYM
5165 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
5166 #undef TARGET_LITTLE_NAME
5167 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5169 #define elf64_bed elf64_x86_64_nacl_bed
5171 #undef ELF_MAXPAGESIZE
5172 #undef ELF_MINPAGESIZE
5173 #undef ELF_COMMONPAGESIZE
5174 #define ELF_MAXPAGESIZE 0x10000
5175 #define ELF_MINPAGESIZE 0x10000
5176 #define ELF_COMMONPAGESIZE 0x10000
5178 /* Restore defaults. */
5180 #undef elf_backend_static_tls_alignment
5181 #undef elf_backend_want_plt_sym
5182 #define elf_backend_want_plt_sym 0
5183 #undef elf_backend_strtab_flags
5184 #undef elf_backend_copy_special_section_fields
5186 /* NaCl uses substantially different PLT entries for the same effects. */
5188 #undef elf_backend_plt_alignment
5189 #define elf_backend_plt_alignment 5
5190 #define NACL_PLT_ENTRY_SIZE 64
5191 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5193 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
5195 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5196 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5197 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5198 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5199 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5201 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5202 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
5204 /* 32 bytes of nop to pad out to the standard size. */
5205 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5206 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5207 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5208 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5209 0x66, /* excess data16 prefix */
5213 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5215 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5216 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5217 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5218 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5220 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5221 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5222 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5224 /* Lazy GOT entries point here (32-byte aligned). */
5225 0x68, /* pushq immediate */
5226 0, 0, 0, 0, /* replaced with index into relocation table. */
5227 0xe9, /* jmp relative */
5228 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5230 /* 22 bytes of nop to pad out to the standard size. */
5231 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5232 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5233 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5236 /* .eh_frame covering the .plt section. */
5238 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
5240 #if (PLT_CIE_LENGTH != 20 \
5241 || PLT_FDE_LENGTH != 36 \
5242 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5243 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5244 # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
5246 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5247 0, 0, 0, 0, /* CIE ID */
5248 1, /* CIE version */
5249 'z', 'R', 0, /* Augmentation string */
5250 1, /* Code alignment factor */
5251 0x78, /* Data alignment factor */
5252 16, /* Return address column */
5253 1, /* Augmentation size */
5254 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5255 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5256 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5257 DW_CFA_nop
, DW_CFA_nop
,
5259 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5260 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
5261 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5262 0, 0, 0, 0, /* .plt size goes here */
5263 0, /* Augmentation size */
5264 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
5265 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5266 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
5267 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5268 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5269 13, /* Block length */
5270 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
5271 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
5272 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5273 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
5274 DW_CFA_nop
, DW_CFA_nop
5277 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
=
5279 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
5280 NACL_PLT_ENTRY_SIZE
, /* plt0_entry_size */
5281 elf_x86_64_nacl_plt_entry
, /* plt_entry */
5282 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5283 elf_x86_64_nacl_plt0_entry
, /* plt_tlsdesc_entry */
5284 NACL_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
5285 2, /* plt_tlsdesc_got1_offset */
5286 9, /* plt_tlsdesc_got2_offset */
5287 6, /* plt_tlsdesc_got1_insn_end */
5288 13, /* plt_tlsdesc_got2_insn_end */
5289 2, /* plt0_got1_offset */
5290 9, /* plt0_got2_offset */
5291 13, /* plt0_got2_insn_end */
5292 3, /* plt_got_offset */
5293 33, /* plt_reloc_offset */
5294 38, /* plt_plt_offset */
5295 7, /* plt_got_insn_size */
5296 42, /* plt_plt_insn_end */
5297 32, /* plt_lazy_offset */
5298 elf_x86_64_nacl_plt0_entry
, /* pic_plt0_entry */
5299 elf_x86_64_nacl_plt_entry
, /* pic_plt_entry */
5300 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
5301 sizeof (elf_x86_64_nacl_eh_frame_plt
) /* eh_frame_plt_size */
5304 static const struct elf_x86_backend_data elf_x86_64_nacl_arch_bed
=
5309 #undef elf_backend_arch_data
5310 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5312 #undef elf_backend_object_p
5313 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5314 #undef elf_backend_modify_segment_map
5315 #define elf_backend_modify_segment_map nacl_modify_segment_map
5316 #undef elf_backend_modify_program_headers
5317 #define elf_backend_modify_program_headers nacl_modify_program_headers
5318 #undef elf_backend_final_write_processing
5319 #define elf_backend_final_write_processing nacl_final_write_processing
5321 #include "elf64-target.h"
5323 /* Native Client x32 support. */
5326 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
5328 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5329 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
5333 #undef TARGET_LITTLE_SYM
5334 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
5335 #undef TARGET_LITTLE_NAME
5336 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5338 #define elf32_bed elf32_x86_64_nacl_bed
5340 #define bfd_elf32_bfd_reloc_type_lookup \
5341 elf_x86_64_reloc_type_lookup
5342 #define bfd_elf32_bfd_reloc_name_lookup \
5343 elf_x86_64_reloc_name_lookup
5344 #define bfd_elf32_get_synthetic_symtab \
5345 elf_x86_64_get_synthetic_symtab
5347 #undef elf_backend_object_p
5348 #define elf_backend_object_p \
5349 elf32_x86_64_nacl_elf_object_p
5351 #undef elf_backend_bfd_from_remote_memory
5352 #define elf_backend_bfd_from_remote_memory \
5353 _bfd_elf32_bfd_from_remote_memory
5355 #undef elf_backend_size_info
5356 #define elf_backend_size_info \
5357 _bfd_elf32_size_info
5360 #define elf32_bed elf32_x86_64_bed
5362 #include "elf32-target.h"
5364 /* Restore defaults. */
5365 #undef elf_backend_object_p
5366 #define elf_backend_object_p elf64_x86_64_elf_object_p
5367 #undef elf_backend_bfd_from_remote_memory
5368 #undef elf_backend_size_info
5369 #undef elf_backend_modify_segment_map
5370 #undef elf_backend_modify_program_headers
5371 #undef elf_backend_final_write_processing
5373 /* Intel L1OM support. */
5376 elf64_l1om_elf_object_p (bfd
*abfd
)
5378 /* Set the right machine number for an L1OM elf64 file. */
5379 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5383 #undef TARGET_LITTLE_SYM
5384 #define TARGET_LITTLE_SYM l1om_elf64_vec
5385 #undef TARGET_LITTLE_NAME
5386 #define TARGET_LITTLE_NAME "elf64-l1om"
5388 #define ELF_ARCH bfd_arch_l1om
5390 #undef ELF_MACHINE_CODE
5391 #define ELF_MACHINE_CODE EM_L1OM
5396 #define elf64_bed elf64_l1om_bed
5398 #undef elf_backend_object_p
5399 #define elf_backend_object_p elf64_l1om_elf_object_p
5401 /* Restore defaults. */
5402 #undef ELF_MAXPAGESIZE
5403 #undef ELF_MINPAGESIZE
5404 #undef ELF_COMMONPAGESIZE
5405 #if DEFAULT_LD_Z_SEPARATE_CODE
5406 # define ELF_MAXPAGESIZE 0x1000
5408 # define ELF_MAXPAGESIZE 0x200000
5410 #define ELF_MINPAGESIZE 0x1000
5411 #define ELF_COMMONPAGESIZE 0x1000
5412 #undef elf_backend_plt_alignment
5413 #define elf_backend_plt_alignment 4
5414 #undef elf_backend_arch_data
5415 #define elf_backend_arch_data &elf_x86_64_arch_bed
5417 #include "elf64-target.h"
5419 /* FreeBSD L1OM support. */
5421 #undef TARGET_LITTLE_SYM
5422 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5423 #undef TARGET_LITTLE_NAME
5424 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5427 #define ELF_OSABI ELFOSABI_FREEBSD
5430 #define elf64_bed elf64_l1om_fbsd_bed
5432 #include "elf64-target.h"
5434 /* Intel K1OM support. */
5437 elf64_k1om_elf_object_p (bfd
*abfd
)
5439 /* Set the right machine number for an K1OM elf64 file. */
5440 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5444 #undef TARGET_LITTLE_SYM
5445 #define TARGET_LITTLE_SYM k1om_elf64_vec
5446 #undef TARGET_LITTLE_NAME
5447 #define TARGET_LITTLE_NAME "elf64-k1om"
5449 #define ELF_ARCH bfd_arch_k1om
5451 #undef ELF_MACHINE_CODE
5452 #define ELF_MACHINE_CODE EM_K1OM
5457 #define elf64_bed elf64_k1om_bed
5459 #undef elf_backend_object_p
5460 #define elf_backend_object_p elf64_k1om_elf_object_p
5462 #undef elf_backend_static_tls_alignment
5464 #undef elf_backend_want_plt_sym
5465 #define elf_backend_want_plt_sym 0
5467 #include "elf64-target.h"
5469 /* FreeBSD K1OM support. */
5471 #undef TARGET_LITTLE_SYM
5472 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
5473 #undef TARGET_LITTLE_NAME
5474 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5477 #define ELF_OSABI ELFOSABI_FREEBSD
5480 #define elf64_bed elf64_k1om_fbsd_bed
5482 #include "elf64-target.h"
5484 /* 32bit x86-64 support. */
5486 #undef TARGET_LITTLE_SYM
5487 #define TARGET_LITTLE_SYM x86_64_elf32_vec
5488 #undef TARGET_LITTLE_NAME
5489 #define TARGET_LITTLE_NAME "elf32-x86-64"
5493 #define ELF_ARCH bfd_arch_i386
5495 #undef ELF_MACHINE_CODE
5496 #define ELF_MACHINE_CODE EM_X86_64
5500 #undef elf_backend_object_p
5501 #define elf_backend_object_p \
5502 elf32_x86_64_elf_object_p
5504 #undef elf_backend_bfd_from_remote_memory
5505 #define elf_backend_bfd_from_remote_memory \
5506 _bfd_elf32_bfd_from_remote_memory
5508 #undef elf_backend_size_info
5509 #define elf_backend_size_info \
5510 _bfd_elf32_size_info
5512 #include "elf32-target.h"