1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2019 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 (!SYMBOL_DEFINED_NON_SHARED_P (h
) && !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
= htab
->params
->call_nop_byte
;
1680 if (htab
->params
->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
;
1858 bfd_boolean do_check_pic
;
1860 r_symndx
= htab
->r_sym (rel
->r_info
);
1861 r_type
= ELF32_R_TYPE (rel
->r_info
);
1863 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1865 /* xgettext:c-format */
1866 _bfd_error_handler (_("%pB: bad symbol index: %d"),
1871 if (r_symndx
< symtab_hdr
->sh_info
)
1873 /* A local symbol. */
1874 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1879 /* Check relocation against local STT_GNU_IFUNC symbol. */
1880 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1882 h
= _bfd_elf_x86_get_local_sym_hash (htab
, abfd
, rel
,
1887 /* Fake a STT_GNU_IFUNC symbol. */
1888 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1890 h
->type
= STT_GNU_IFUNC
;
1893 h
->forced_local
= 1;
1894 h
->root
.type
= bfd_link_hash_defined
;
1902 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1903 while (h
->root
.type
== bfd_link_hash_indirect
1904 || h
->root
.type
== bfd_link_hash_warning
)
1905 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1908 /* Check invalid x32 relocations. */
1909 if (!ABI_64_P (abfd
))
1915 case R_X86_64_DTPOFF64
:
1916 case R_X86_64_TPOFF64
:
1918 case R_X86_64_GOTOFF64
:
1919 case R_X86_64_GOT64
:
1920 case R_X86_64_GOTPCREL64
:
1921 case R_X86_64_GOTPC64
:
1922 case R_X86_64_GOTPLT64
:
1923 case R_X86_64_PLTOFF64
:
1926 name
= h
->root
.root
.string
;
1928 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1931 /* xgettext:c-format */
1932 (_("%pB: relocation %s against symbol `%s' isn't "
1933 "supported in x32 mode"), abfd
,
1934 x86_64_elf_howto_table
[r_type
].name
, name
);
1935 bfd_set_error (bfd_error_bad_value
);
1943 /* It is referenced by a non-shared object. */
1946 if (h
->type
== STT_GNU_IFUNC
)
1947 elf_tdata (info
->output_bfd
)->has_gnu_symbols
1948 |= elf_gnu_symbol_ifunc
;
1951 converted_reloc
= FALSE
;
1952 if ((r_type
== R_X86_64_GOTPCREL
1953 || r_type
== R_X86_64_GOTPCRELX
1954 || r_type
== R_X86_64_REX_GOTPCRELX
)
1955 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1957 Elf_Internal_Rela
*irel
= (Elf_Internal_Rela
*) rel
;
1958 if (!elf_x86_64_convert_load_reloc (abfd
, contents
, &r_type
,
1959 irel
, h
, &converted_reloc
,
1963 if (converted_reloc
)
1967 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, contents
,
1968 symtab_hdr
, sym_hashes
,
1969 &r_type
, GOT_UNKNOWN
,
1970 rel
, rel_end
, h
, r_symndx
, FALSE
))
1973 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1974 if (h
== htab
->elf
.hgot
)
1975 htab
->got_referenced
= TRUE
;
1977 eh
= (struct elf_x86_link_hash_entry
*) h
;
1980 case R_X86_64_TLSLD
:
1981 htab
->tls_ld_or_ldm_got
.refcount
= 1;
1984 case R_X86_64_TPOFF32
:
1985 if (!bfd_link_executable (info
) && ABI_64_P (abfd
))
1986 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
1987 &x86_64_elf_howto_table
[r_type
]);
1989 eh
->zero_undefweak
&= 0x2;
1992 case R_X86_64_GOTTPOFF
:
1993 if (!bfd_link_executable (info
))
1994 info
->flags
|= DF_STATIC_TLS
;
1997 case R_X86_64_GOT32
:
1998 case R_X86_64_GOTPCREL
:
1999 case R_X86_64_GOTPCRELX
:
2000 case R_X86_64_REX_GOTPCRELX
:
2001 case R_X86_64_TLSGD
:
2002 case R_X86_64_GOT64
:
2003 case R_X86_64_GOTPCREL64
:
2004 case R_X86_64_GOTPLT64
:
2005 case R_X86_64_GOTPC32_TLSDESC
:
2006 case R_X86_64_TLSDESC_CALL
:
2007 /* This symbol requires a global offset table entry. */
2009 int tls_type
, old_tls_type
;
2013 default: tls_type
= GOT_NORMAL
; break;
2014 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
2015 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
2016 case R_X86_64_GOTPC32_TLSDESC
:
2017 case R_X86_64_TLSDESC_CALL
:
2018 tls_type
= GOT_TLS_GDESC
; break;
2023 h
->got
.refcount
= 1;
2024 old_tls_type
= eh
->tls_type
;
2028 bfd_signed_vma
*local_got_refcounts
;
2030 /* This is a global offset table entry for a local symbol. */
2031 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2032 if (local_got_refcounts
== NULL
)
2036 size
= symtab_hdr
->sh_info
;
2037 size
*= sizeof (bfd_signed_vma
)
2038 + sizeof (bfd_vma
) + sizeof (char);
2039 local_got_refcounts
= ((bfd_signed_vma
*)
2040 bfd_zalloc (abfd
, size
));
2041 if (local_got_refcounts
== NULL
)
2043 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2044 elf_x86_local_tlsdesc_gotent (abfd
)
2045 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2046 elf_x86_local_got_tls_type (abfd
)
2047 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2049 local_got_refcounts
[r_symndx
] = 1;
2051 = elf_x86_local_got_tls_type (abfd
) [r_symndx
];
2054 /* If a TLS symbol is accessed using IE at least once,
2055 there is no point to use dynamic model for it. */
2056 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2057 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2058 || tls_type
!= GOT_TLS_IE
))
2060 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
2061 tls_type
= old_tls_type
;
2062 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2063 && GOT_TLS_GD_ANY_P (tls_type
))
2064 tls_type
|= old_tls_type
;
2068 name
= h
->root
.root
.string
;
2070 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
2073 /* xgettext:c-format */
2074 (_("%pB: '%s' accessed both as normal and"
2075 " thread local symbol"),
2077 bfd_set_error (bfd_error_bad_value
);
2082 if (old_tls_type
!= tls_type
)
2085 eh
->tls_type
= tls_type
;
2087 elf_x86_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2092 case R_X86_64_GOTOFF64
:
2093 case R_X86_64_GOTPC32
:
2094 case R_X86_64_GOTPC64
:
2097 eh
->zero_undefweak
&= 0x2;
2100 case R_X86_64_PLT32
:
2101 case R_X86_64_PLT32_BND
:
2102 /* This symbol requires a procedure linkage table entry. We
2103 actually build the entry in adjust_dynamic_symbol,
2104 because this might be a case of linking PIC code which is
2105 never referenced by a dynamic object, in which case we
2106 don't need to generate a procedure linkage table entry
2109 /* If this is a local symbol, we resolve it directly without
2110 creating a procedure linkage table entry. */
2114 eh
->zero_undefweak
&= 0x2;
2116 h
->plt
.refcount
= 1;
2119 case R_X86_64_PLTOFF64
:
2120 /* This tries to form the 'address' of a function relative
2121 to GOT. For global symbols we need a PLT entry. */
2125 h
->plt
.refcount
= 1;
2129 case R_X86_64_SIZE32
:
2130 case R_X86_64_SIZE64
:
2137 case R_X86_64_PC32_BND
:
2138 do_check_pic
= TRUE
;
2142 if (!ABI_64_P (abfd
))
2148 /* Check relocation overflow as these relocs may lead to
2149 run-time relocation overflow. Don't error out for
2150 sections we don't care about, such as debug sections or
2151 when relocation overflow check is disabled. */
2152 if (!htab
->params
->no_reloc_overflow_check
2154 && (bfd_link_pic (info
)
2155 || (bfd_link_executable (info
)
2159 && (sec
->flags
& SEC_READONLY
) == 0)))
2160 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
2161 &x86_64_elf_howto_table
[r_type
]);
2167 do_check_pic
= FALSE
;
2169 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2170 eh
->zero_undefweak
|= 0x2;
2171 /* We are called after all symbols have been resolved. Only
2172 relocation against STT_GNU_IFUNC symbol must go through
2175 && (bfd_link_executable (info
)
2176 || h
->type
== STT_GNU_IFUNC
))
2178 bfd_boolean func_pointer_ref
= FALSE
;
2180 if (r_type
== R_X86_64_PC32
)
2182 /* Since something like ".long foo - ." may be used
2183 as pointer, make sure that PLT is used if foo is
2184 a function defined in a shared library. */
2185 if ((sec
->flags
& SEC_CODE
) == 0)
2187 h
->pointer_equality_needed
= 1;
2188 if (bfd_link_pie (info
)
2189 && h
->type
== STT_FUNC
2194 h
->plt
.refcount
= 1;
2198 else if (r_type
!= R_X86_64_PC32_BND
2199 && r_type
!= R_X86_64_PC64
)
2201 h
->pointer_equality_needed
= 1;
2202 /* At run-time, R_X86_64_64 can be resolved for both
2203 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2204 can only be resolved for x32. */
2205 if ((sec
->flags
& SEC_READONLY
) == 0
2206 && (r_type
== R_X86_64_64
2207 || (!ABI_64_P (abfd
)
2208 && (r_type
== R_X86_64_32
2209 || r_type
== R_X86_64_32S
))))
2210 func_pointer_ref
= TRUE
;
2213 if (!func_pointer_ref
)
2215 /* If this reloc is in a read-only section, we might
2216 need a copy reloc. We can't check reliably at this
2217 stage whether the section is read-only, as input
2218 sections have not yet been mapped to output sections.
2219 Tentatively set the flag for now, and correct in
2220 adjust_dynamic_symbol. */
2223 /* We may need a .plt entry if the symbol is a function
2224 defined in a shared lib or is a function referenced
2225 from the code or read-only section. */
2227 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2228 h
->plt
.refcount
= 1;
2234 /* Don't complain about -fPIC if the symbol is undefined
2235 when building executable unless it is unresolved weak
2236 symbol, references a dynamic definition in PIE or
2237 -z nocopyreloc is used. */
2238 bfd_boolean no_copyreloc_p
2239 = (info
->nocopyreloc
2241 && !h
->root
.linker_def
2242 && !h
->root
.ldscript_def
2243 && eh
->def_protected
2244 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)));
2245 if ((sec
->flags
& SEC_ALLOC
) != 0
2246 && (sec
->flags
& SEC_READONLY
) != 0
2248 && ((bfd_link_executable (info
)
2249 && ((h
->root
.type
== bfd_link_hash_undefweak
2251 || !UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2253 || (bfd_link_pie (info
)
2254 && !SYMBOL_DEFINED_NON_SHARED_P (h
)
2258 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))))
2259 || bfd_link_dll (info
)))
2261 bfd_boolean fail
= FALSE
;
2262 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
2264 /* Symbol is referenced locally. Make sure it is
2266 fail
= !SYMBOL_DEFINED_NON_SHARED_P (h
);
2268 else if (bfd_link_pie (info
))
2270 /* We can only use PC-relative relocations in PIE
2271 from non-code sections. */
2272 if (h
->type
== STT_FUNC
2273 && (sec
->flags
& SEC_CODE
) != 0)
2276 else if (no_copyreloc_p
|| bfd_link_dll (info
))
2278 /* Symbol doesn't need copy reloc and isn't
2279 referenced locally. Don't allow PC-relative
2280 relocations against default and protected
2281 symbols since address of protected function
2282 and location of protected data may not be in
2283 the shared object. */
2284 fail
= (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2285 || ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
);
2289 return elf_x86_64_need_pic (info
, abfd
, sec
, h
,
2291 &x86_64_elf_howto_table
[r_type
]);
2297 if (NEED_DYNAMIC_RELOCATION_P (info
, TRUE
, h
, sec
, r_type
,
2298 htab
->pointer_r_type
))
2300 struct elf_dyn_relocs
*p
;
2301 struct elf_dyn_relocs
**head
;
2303 /* We must copy these reloc types into the output file.
2304 Create a reloc section in dynobj and make room for
2308 sreloc
= _bfd_elf_make_dynamic_reloc_section
2309 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2310 abfd
, /*rela?*/ TRUE
);
2316 /* If this is a global symbol, we count the number of
2317 relocations we need for this symbol. */
2319 head
= &eh
->dyn_relocs
;
2322 /* Track dynamic relocs needed for local syms too.
2323 We really need local syms available to do this
2328 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2333 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2337 /* Beware of type punned pointers vs strict aliasing
2339 vpp
= &(elf_section_data (s
)->local_dynrel
);
2340 head
= (struct elf_dyn_relocs
**)vpp
;
2344 if (p
== NULL
|| p
->sec
!= sec
)
2346 bfd_size_type amt
= sizeof *p
;
2348 p
= ((struct elf_dyn_relocs
*)
2349 bfd_alloc (htab
->elf
.dynobj
, amt
));
2360 /* Count size relocation as PC-relative relocation. */
2361 if (X86_PCREL_TYPE_P (r_type
) || size_reloc
)
2366 /* This relocation describes the C++ object vtable hierarchy.
2367 Reconstruct it for later use during GC. */
2368 case R_X86_64_GNU_VTINHERIT
:
2369 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2373 /* This relocation describes which C++ vtable entries are actually
2374 used. Record for later use during GC. */
2375 case R_X86_64_GNU_VTENTRY
:
2376 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2385 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2387 if (!converted
&& !info
->keep_memory
)
2391 /* Cache the section contents for elf_link_input_bfd if any
2392 load is converted or --no-keep-memory isn't used. */
2393 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2397 /* Cache relocations if any load is converted. */
2398 if (elf_section_data (sec
)->relocs
!= relocs
&& converted
)
2399 elf_section_data (sec
)->relocs
= (Elf_Internal_Rela
*) relocs
;
2404 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2406 sec
->check_relocs_failed
= 1;
2410 /* Return the relocation value for @tpoff relocation
2411 if STT_TLS virtual address is ADDRESS. */
2414 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2416 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2417 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
2418 bfd_vma static_tls_size
;
2420 /* If tls_segment is NULL, we should have signalled an error already. */
2421 if (htab
->tls_sec
== NULL
)
2424 /* Consider special static TLS alignment requirements. */
2425 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
2426 return address
- static_tls_size
- htab
->tls_sec
->vma
;
2429 /* Relocate an x86_64 ELF section. */
2432 elf_x86_64_relocate_section (bfd
*output_bfd
,
2433 struct bfd_link_info
*info
,
2435 asection
*input_section
,
2437 Elf_Internal_Rela
*relocs
,
2438 Elf_Internal_Sym
*local_syms
,
2439 asection
**local_sections
)
2441 struct elf_x86_link_hash_table
*htab
;
2442 Elf_Internal_Shdr
*symtab_hdr
;
2443 struct elf_link_hash_entry
**sym_hashes
;
2444 bfd_vma
*local_got_offsets
;
2445 bfd_vma
*local_tlsdesc_gotents
;
2446 Elf_Internal_Rela
*rel
;
2447 Elf_Internal_Rela
*wrel
;
2448 Elf_Internal_Rela
*relend
;
2449 unsigned int plt_entry_size
;
2451 /* Skip if check_relocs failed. */
2452 if (input_section
->check_relocs_failed
)
2455 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
2459 if (!is_x86_elf (input_bfd
, htab
))
2461 bfd_set_error (bfd_error_wrong_format
);
2465 plt_entry_size
= htab
->plt
.plt_entry_size
;
2466 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2467 sym_hashes
= elf_sym_hashes (input_bfd
);
2468 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2469 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
2471 _bfd_x86_elf_set_tls_module_base (info
);
2473 rel
= wrel
= relocs
;
2474 relend
= relocs
+ input_section
->reloc_count
;
2475 for (; rel
< relend
; wrel
++, rel
++)
2477 unsigned int r_type
, r_type_tls
;
2478 reloc_howto_type
*howto
;
2479 unsigned long r_symndx
;
2480 struct elf_link_hash_entry
*h
;
2481 struct elf_x86_link_hash_entry
*eh
;
2482 Elf_Internal_Sym
*sym
;
2484 bfd_vma off
, offplt
, plt_offset
;
2486 bfd_boolean unresolved_reloc
;
2487 bfd_reloc_status_type r
;
2489 asection
*base_got
, *resolved_plt
;
2491 bfd_boolean resolved_to_zero
;
2492 bfd_boolean relative_reloc
;
2493 bfd_boolean converted_reloc
;
2494 bfd_boolean need_copy_reloc_in_pie
;
2496 r_type
= ELF32_R_TYPE (rel
->r_info
);
2497 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
2498 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
2505 r_symndx
= htab
->r_sym (rel
->r_info
);
2506 converted_reloc
= (r_type
& R_X86_64_converted_reloc_bit
) != 0;
2507 if (converted_reloc
)
2509 r_type
&= ~R_X86_64_converted_reloc_bit
;
2510 rel
->r_info
= htab
->r_info (r_symndx
, r_type
);
2513 howto
= elf_x86_64_rtype_to_howto (input_bfd
, r_type
);
2515 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
2520 unresolved_reloc
= FALSE
;
2521 if (r_symndx
< symtab_hdr
->sh_info
)
2523 sym
= local_syms
+ r_symndx
;
2524 sec
= local_sections
[r_symndx
];
2526 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
2528 st_size
= sym
->st_size
;
2530 /* Relocate against local STT_GNU_IFUNC symbol. */
2531 if (!bfd_link_relocatable (info
)
2532 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2534 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
,
2539 /* Set STT_GNU_IFUNC symbol value. */
2540 h
->root
.u
.def
.value
= sym
->st_value
;
2541 h
->root
.u
.def
.section
= sec
;
2546 bfd_boolean warned ATTRIBUTE_UNUSED
;
2547 bfd_boolean ignored ATTRIBUTE_UNUSED
;
2549 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2550 r_symndx
, symtab_hdr
, sym_hashes
,
2552 unresolved_reloc
, warned
, ignored
);
2556 if (sec
!= NULL
&& discarded_section (sec
))
2558 _bfd_clear_contents (howto
, input_bfd
, input_section
,
2559 contents
, rel
->r_offset
);
2560 wrel
->r_offset
= rel
->r_offset
;
2564 /* For ld -r, remove relocations in debug sections against
2565 sections defined in discarded sections. Not done for
2566 eh_frame editing code expects to be present. */
2567 if (bfd_link_relocatable (info
)
2568 && (input_section
->flags
& SEC_DEBUGGING
))
2574 if (bfd_link_relocatable (info
))
2581 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
2583 if (r_type
== R_X86_64_64
)
2585 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
2586 zero-extend it to 64bit if addend is zero. */
2587 r_type
= R_X86_64_32
;
2588 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2590 else if (r_type
== R_X86_64_SIZE64
)
2592 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
2593 zero-extend it to 64bit if addend is zero. */
2594 r_type
= R_X86_64_SIZE32
;
2595 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2599 eh
= (struct elf_x86_link_hash_entry
*) h
;
2601 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2602 it here if it is defined in a non-shared object. */
2604 && h
->type
== STT_GNU_IFUNC
2610 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2612 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2613 STT_GNU_IFUNC symbol as STT_FUNC. */
2614 if (elf_section_type (input_section
) == SHT_NOTE
)
2616 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2617 sections because such sections are not SEC_ALLOC and
2618 thus ld.so will not process them. */
2619 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2629 case R_X86_64_GOTPCREL
:
2630 case R_X86_64_GOTPCRELX
:
2631 case R_X86_64_REX_GOTPCRELX
:
2632 case R_X86_64_GOTPCREL64
:
2633 base_got
= htab
->elf
.sgot
;
2634 off
= h
->got
.offset
;
2636 if (base_got
== NULL
)
2639 if (off
== (bfd_vma
) -1)
2641 /* We can't use h->got.offset here to save state, or
2642 even just remember the offset, as finish_dynamic_symbol
2643 would use that as offset into .got. */
2645 if (h
->plt
.offset
== (bfd_vma
) -1)
2648 if (htab
->elf
.splt
!= NULL
)
2650 plt_index
= (h
->plt
.offset
/ plt_entry_size
2651 - htab
->plt
.has_plt0
);
2652 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2653 base_got
= htab
->elf
.sgotplt
;
2657 plt_index
= h
->plt
.offset
/ plt_entry_size
;
2658 off
= plt_index
* GOT_ENTRY_SIZE
;
2659 base_got
= htab
->elf
.igotplt
;
2662 if (h
->dynindx
== -1
2666 /* This references the local defitionion. We must
2667 initialize this entry in the global offset table.
2668 Since the offset must always be a multiple of 8,
2669 we use the least significant bit to record
2670 whether we have initialized it already.
2672 When doing a dynamic link, we create a .rela.got
2673 relocation entry to initialize the value. This
2674 is done in the finish_dynamic_symbol routine. */
2679 bfd_put_64 (output_bfd
, relocation
,
2680 base_got
->contents
+ off
);
2681 /* Note that this is harmless for the GOTPLT64
2682 case, as -1 | 1 still is -1. */
2688 relocation
= (base_got
->output_section
->vma
2689 + base_got
->output_offset
+ off
);
2694 if (h
->plt
.offset
== (bfd_vma
) -1)
2696 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2697 if (r_type
== htab
->pointer_r_type
2698 && (input_section
->flags
& SEC_CODE
) == 0)
2699 goto do_ifunc_pointer
;
2700 goto bad_ifunc_reloc
;
2703 /* STT_GNU_IFUNC symbol must go through PLT. */
2704 if (htab
->elf
.splt
!= NULL
)
2706 if (htab
->plt_second
!= NULL
)
2708 resolved_plt
= htab
->plt_second
;
2709 plt_offset
= eh
->plt_second
.offset
;
2713 resolved_plt
= htab
->elf
.splt
;
2714 plt_offset
= h
->plt
.offset
;
2719 resolved_plt
= htab
->elf
.iplt
;
2720 plt_offset
= h
->plt
.offset
;
2723 relocation
= (resolved_plt
->output_section
->vma
2724 + resolved_plt
->output_offset
+ plt_offset
);
2730 if (h
->root
.root
.string
)
2731 name
= h
->root
.root
.string
;
2733 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2736 /* xgettext:c-format */
2737 (_("%pB: relocation %s against STT_GNU_IFUNC "
2738 "symbol `%s' isn't supported"), input_bfd
,
2740 bfd_set_error (bfd_error_bad_value
);
2744 if (bfd_link_pic (info
))
2749 if (ABI_64_P (output_bfd
))
2754 if (rel
->r_addend
!= 0)
2756 if (h
->root
.root
.string
)
2757 name
= h
->root
.root
.string
;
2759 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
2762 /* xgettext:c-format */
2763 (_("%pB: relocation %s against STT_GNU_IFUNC "
2764 "symbol `%s' has non-zero addend: %" PRId64
),
2765 input_bfd
, howto
->name
, name
, (int64_t) rel
->r_addend
);
2766 bfd_set_error (bfd_error_bad_value
);
2770 /* Generate dynamic relcoation only when there is a
2771 non-GOT reference in a shared object or there is no
2773 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2774 || h
->plt
.offset
== (bfd_vma
) -1)
2776 Elf_Internal_Rela outrel
;
2779 /* Need a dynamic relocation to get the real function
2781 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2785 if (outrel
.r_offset
== (bfd_vma
) -1
2786 || outrel
.r_offset
== (bfd_vma
) -2)
2789 outrel
.r_offset
+= (input_section
->output_section
->vma
2790 + input_section
->output_offset
);
2792 if (POINTER_LOCAL_IFUNC_P (info
, h
))
2794 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
2795 h
->root
.root
.string
,
2796 h
->root
.u
.def
.section
->owner
);
2798 /* This symbol is resolved locally. */
2799 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
2800 outrel
.r_addend
= (h
->root
.u
.def
.value
2801 + h
->root
.u
.def
.section
->output_section
->vma
2802 + h
->root
.u
.def
.section
->output_offset
);
2806 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
2807 outrel
.r_addend
= 0;
2810 /* Dynamic relocations are stored in
2811 1. .rela.ifunc section in PIC object.
2812 2. .rela.got section in dynamic executable.
2813 3. .rela.iplt section in static executable. */
2814 if (bfd_link_pic (info
))
2815 sreloc
= htab
->elf
.irelifunc
;
2816 else if (htab
->elf
.splt
!= NULL
)
2817 sreloc
= htab
->elf
.srelgot
;
2819 sreloc
= htab
->elf
.irelplt
;
2820 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2822 /* If this reloc is against an external symbol, we
2823 do not want to fiddle with the addend. Otherwise,
2824 we need to include the symbol value so that it
2825 becomes an addend for the dynamic reloc. For an
2826 internal symbol, we have updated addend. */
2831 case R_X86_64_PC32_BND
:
2833 case R_X86_64_PLT32
:
2834 case R_X86_64_PLT32_BND
:
2840 resolved_to_zero
= (eh
!= NULL
2841 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
2843 /* When generating a shared object, the relocations handled here are
2844 copied into the output file to be resolved at run time. */
2847 case R_X86_64_GOT32
:
2848 case R_X86_64_GOT64
:
2849 /* Relocation is to the entry for this symbol in the global
2851 case R_X86_64_GOTPCREL
:
2852 case R_X86_64_GOTPCRELX
:
2853 case R_X86_64_REX_GOTPCRELX
:
2854 case R_X86_64_GOTPCREL64
:
2855 /* Use global offset table entry as symbol value. */
2856 case R_X86_64_GOTPLT64
:
2857 /* This is obsolete and treated the same as GOT64. */
2858 base_got
= htab
->elf
.sgot
;
2860 if (htab
->elf
.sgot
== NULL
)
2863 relative_reloc
= FALSE
;
2866 off
= h
->got
.offset
;
2868 && h
->plt
.offset
!= (bfd_vma
)-1
2869 && off
== (bfd_vma
)-1)
2871 /* We can't use h->got.offset here to save
2872 state, or even just remember the offset, as
2873 finish_dynamic_symbol would use that as offset into
2875 bfd_vma plt_index
= (h
->plt
.offset
/ plt_entry_size
2876 - htab
->plt
.has_plt0
);
2877 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2878 base_got
= htab
->elf
.sgotplt
;
2881 if (RESOLVED_LOCALLY_P (info
, h
, htab
))
2883 /* We must initialize this entry in the global offset
2884 table. Since the offset must always be a multiple
2885 of 8, we use the least significant bit to record
2886 whether we have initialized it already.
2888 When doing a dynamic link, we create a .rela.got
2889 relocation entry to initialize the value. This is
2890 done in the finish_dynamic_symbol routine. */
2895 bfd_put_64 (output_bfd
, relocation
,
2896 base_got
->contents
+ off
);
2897 /* Note that this is harmless for the GOTPLT64 case,
2898 as -1 | 1 still is -1. */
2901 if (GENERATE_RELATIVE_RELOC_P (info
, h
))
2903 /* If this symbol isn't dynamic in PIC,
2904 generate R_X86_64_RELATIVE here. */
2905 eh
->no_finish_dynamic_symbol
= 1;
2906 relative_reloc
= TRUE
;
2911 unresolved_reloc
= FALSE
;
2915 if (local_got_offsets
== NULL
)
2918 off
= local_got_offsets
[r_symndx
];
2920 /* The offset must always be a multiple of 8. We use
2921 the least significant bit to record whether we have
2922 already generated the necessary reloc. */
2927 bfd_put_64 (output_bfd
, relocation
,
2928 base_got
->contents
+ off
);
2929 local_got_offsets
[r_symndx
] |= 1;
2931 if (bfd_link_pic (info
))
2932 relative_reloc
= TRUE
;
2939 Elf_Internal_Rela outrel
;
2941 /* We need to generate a R_X86_64_RELATIVE reloc
2942 for the dynamic linker. */
2943 s
= htab
->elf
.srelgot
;
2947 outrel
.r_offset
= (base_got
->output_section
->vma
2948 + base_got
->output_offset
2950 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
2951 outrel
.r_addend
= relocation
;
2952 elf_append_rela (output_bfd
, s
, &outrel
);
2955 if (off
>= (bfd_vma
) -2)
2958 relocation
= base_got
->output_section
->vma
2959 + base_got
->output_offset
+ off
;
2960 if (r_type
!= R_X86_64_GOTPCREL
2961 && r_type
!= R_X86_64_GOTPCRELX
2962 && r_type
!= R_X86_64_REX_GOTPCRELX
2963 && r_type
!= R_X86_64_GOTPCREL64
)
2964 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2965 - htab
->elf
.sgotplt
->output_offset
;
2969 case R_X86_64_GOTOFF64
:
2970 /* Relocation is relative to the start of the global offset
2973 /* Check to make sure it isn't a protected function or data
2974 symbol for shared library since it may not be local when
2975 used as function address or with copy relocation. We also
2976 need to make sure that a symbol is referenced locally. */
2977 if (bfd_link_pic (info
) && h
)
2979 if (!h
->def_regular
)
2983 switch (ELF_ST_VISIBILITY (h
->other
))
2986 v
= _("hidden symbol");
2989 v
= _("internal symbol");
2992 v
= _("protected symbol");
3000 /* xgettext:c-format */
3001 (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s"
3002 " `%s' can not be used when making a shared object"),
3003 input_bfd
, v
, h
->root
.root
.string
);
3004 bfd_set_error (bfd_error_bad_value
);
3007 else if (!bfd_link_executable (info
)
3008 && !SYMBOL_REFERENCES_LOCAL_P (info
, h
)
3009 && (h
->type
== STT_FUNC
3010 || h
->type
== STT_OBJECT
)
3011 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3014 /* xgettext:c-format */
3015 (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s"
3016 " `%s' can not be used when making a shared object"),
3018 h
->type
== STT_FUNC
? "function" : "data",
3019 h
->root
.root
.string
);
3020 bfd_set_error (bfd_error_bad_value
);
3025 /* Note that sgot is not involved in this
3026 calculation. We always want the start of .got.plt. If we
3027 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3028 permitted by the ABI, we might have to change this
3030 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3031 + htab
->elf
.sgotplt
->output_offset
;
3034 case R_X86_64_GOTPC32
:
3035 case R_X86_64_GOTPC64
:
3036 /* Use global offset table as symbol value. */
3037 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3038 + htab
->elf
.sgotplt
->output_offset
;
3039 unresolved_reloc
= FALSE
;
3042 case R_X86_64_PLTOFF64
:
3043 /* Relocation is PLT entry relative to GOT. For local
3044 symbols it's the symbol itself relative to GOT. */
3046 /* See PLT32 handling. */
3047 && (h
->plt
.offset
!= (bfd_vma
) -1
3048 || eh
->plt_got
.offset
!= (bfd_vma
) -1)
3049 && htab
->elf
.splt
!= NULL
)
3051 if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
3053 /* Use the GOT PLT. */
3054 resolved_plt
= htab
->plt_got
;
3055 plt_offset
= eh
->plt_got
.offset
;
3057 else if (htab
->plt_second
!= NULL
)
3059 resolved_plt
= htab
->plt_second
;
3060 plt_offset
= eh
->plt_second
.offset
;
3064 resolved_plt
= htab
->elf
.splt
;
3065 plt_offset
= h
->plt
.offset
;
3068 relocation
= (resolved_plt
->output_section
->vma
3069 + resolved_plt
->output_offset
3071 unresolved_reloc
= FALSE
;
3074 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3075 + htab
->elf
.sgotplt
->output_offset
;
3078 case R_X86_64_PLT32
:
3079 case R_X86_64_PLT32_BND
:
3080 /* Relocation is to the entry for this symbol in the
3081 procedure linkage table. */
3083 /* Resolve a PLT32 reloc against a local symbol directly,
3084 without using the procedure linkage table. */
3088 if ((h
->plt
.offset
== (bfd_vma
) -1
3089 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3090 || htab
->elf
.splt
== NULL
)
3092 /* We didn't make a PLT entry for this symbol. This
3093 happens when statically linking PIC code, or when
3094 using -Bsymbolic. */
3099 if (h
->plt
.offset
!= (bfd_vma
) -1)
3101 if (htab
->plt_second
!= NULL
)
3103 resolved_plt
= htab
->plt_second
;
3104 plt_offset
= eh
->plt_second
.offset
;
3108 resolved_plt
= htab
->elf
.splt
;
3109 plt_offset
= h
->plt
.offset
;
3114 /* Use the GOT PLT. */
3115 resolved_plt
= htab
->plt_got
;
3116 plt_offset
= eh
->plt_got
.offset
;
3119 relocation
= (resolved_plt
->output_section
->vma
3120 + resolved_plt
->output_offset
3122 unresolved_reloc
= FALSE
;
3125 case R_X86_64_SIZE32
:
3126 case R_X86_64_SIZE64
:
3127 /* Set to symbol size. */
3128 relocation
= st_size
;
3134 case R_X86_64_PC32_BND
:
3135 /* Since x86-64 has PC-relative PLT, we can use PLT in PIE
3136 as function address. */
3138 && (input_section
->flags
& SEC_CODE
) == 0
3139 && bfd_link_pie (info
)
3140 && h
->type
== STT_FUNC
3151 /* FIXME: The ABI says the linker should make sure the value is
3152 the same when it's zeroextended to 64 bit. */
3155 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3158 need_copy_reloc_in_pie
= (bfd_link_pie (info
)
3163 == bfd_link_hash_undefined
))
3164 && (X86_PCREL_TYPE_P (r_type
)
3165 || X86_SIZE_TYPE_P (r_type
)));
3167 if (GENERATE_DYNAMIC_RELOCATION_P (info
, eh
, r_type
,
3168 need_copy_reloc_in_pie
,
3169 resolved_to_zero
, FALSE
))
3171 Elf_Internal_Rela outrel
;
3172 bfd_boolean skip
, relocate
;
3175 /* When generating a shared object, these relocations
3176 are copied into the output file to be resolved at run
3182 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3184 if (outrel
.r_offset
== (bfd_vma
) -1)
3186 else if (outrel
.r_offset
== (bfd_vma
) -2)
3187 skip
= TRUE
, relocate
= TRUE
;
3189 outrel
.r_offset
+= (input_section
->output_section
->vma
3190 + input_section
->output_offset
);
3193 memset (&outrel
, 0, sizeof outrel
);
3195 else if (COPY_INPUT_RELOC_P (info
, h
, r_type
))
3197 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3198 outrel
.r_addend
= rel
->r_addend
;
3202 /* This symbol is local, or marked to become local.
3203 When relocation overflow check is disabled, we
3204 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
3205 if (r_type
== htab
->pointer_r_type
3206 || (r_type
== R_X86_64_32
3207 && htab
->params
->no_reloc_overflow_check
))
3210 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3211 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3213 else if (r_type
== R_X86_64_64
3214 && !ABI_64_P (output_bfd
))
3217 outrel
.r_info
= htab
->r_info (0,
3218 R_X86_64_RELATIVE64
);
3219 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3220 /* Check addend overflow. */
3221 if ((outrel
.r_addend
& 0x80000000)
3222 != (rel
->r_addend
& 0x80000000))
3225 int addend
= rel
->r_addend
;
3226 if (h
&& h
->root
.root
.string
)
3227 name
= h
->root
.root
.string
;
3229 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3232 /* xgettext:c-format */
3233 (_("%pB: addend %s%#x in relocation %s against "
3234 "symbol `%s' at %#" PRIx64
3235 " in section `%pA' is out of range"),
3236 input_bfd
, addend
< 0 ? "-" : "", addend
,
3237 howto
->name
, name
, (uint64_t) rel
->r_offset
,
3239 bfd_set_error (bfd_error_bad_value
);
3247 if (bfd_is_abs_section (sec
))
3249 else if (sec
== NULL
|| sec
->owner
== NULL
)
3251 bfd_set_error (bfd_error_bad_value
);
3258 /* We are turning this relocation into one
3259 against a section symbol. It would be
3260 proper to subtract the symbol's value,
3261 osec->vma, from the emitted reloc addend,
3262 but ld.so expects buggy relocs. */
3263 osec
= sec
->output_section
;
3264 sindx
= elf_section_data (osec
)->dynindx
;
3267 asection
*oi
= htab
->elf
.text_index_section
;
3268 sindx
= elf_section_data (oi
)->dynindx
;
3270 BFD_ASSERT (sindx
!= 0);
3273 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3274 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3278 sreloc
= elf_section_data (input_section
)->sreloc
;
3280 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3282 r
= bfd_reloc_notsupported
;
3283 goto check_relocation_error
;
3286 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3288 /* If this reloc is against an external symbol, we do
3289 not want to fiddle with the addend. Otherwise, we
3290 need to include the symbol value so that it becomes
3291 an addend for the dynamic reloc. */
3298 case R_X86_64_TLSGD
:
3299 case R_X86_64_GOTPC32_TLSDESC
:
3300 case R_X86_64_TLSDESC_CALL
:
3301 case R_X86_64_GOTTPOFF
:
3302 tls_type
= GOT_UNKNOWN
;
3303 if (h
== NULL
&& local_got_offsets
)
3304 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
3306 tls_type
= elf_x86_hash_entry (h
)->tls_type
;
3308 r_type_tls
= r_type
;
3309 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3310 input_section
, contents
,
3311 symtab_hdr
, sym_hashes
,
3312 &r_type_tls
, tls_type
, rel
,
3313 relend
, h
, r_symndx
, TRUE
))
3316 if (r_type_tls
== R_X86_64_TPOFF32
)
3318 bfd_vma roff
= rel
->r_offset
;
3320 BFD_ASSERT (! unresolved_reloc
);
3322 if (r_type
== R_X86_64_TLSGD
)
3324 /* GD->LE transition. For 64bit, change
3325 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3326 .word 0x6666; rex64; call __tls_get_addr@PLT
3328 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3330 call *__tls_get_addr@GOTPCREL(%rip)
3331 which may be converted to
3332 addr32 call __tls_get_addr
3335 leaq foo@tpoff(%rax), %rax
3337 leaq foo@tlsgd(%rip), %rdi
3338 .word 0x6666; rex64; call __tls_get_addr@PLT
3340 leaq foo@tlsgd(%rip), %rdi
3342 call *__tls_get_addr@GOTPCREL(%rip)
3343 which may be converted to
3344 addr32 call __tls_get_addr
3347 leaq foo@tpoff(%rax), %rax
3348 For largepic, change:
3349 leaq foo@tlsgd(%rip), %rdi
3350 movabsq $__tls_get_addr@pltoff, %rax
3355 leaq foo@tpoff(%rax), %rax
3356 nopw 0x0(%rax,%rax,1) */
3358 if (ABI_64_P (output_bfd
))
3360 if (contents
[roff
+ 5] == 0xb8)
3363 || (roff
- 3 + 22) > input_section
->size
)
3366 info
->callbacks
->einfo
3367 (_("%F%P: corrupt input: %pB\n"),
3371 memcpy (contents
+ roff
- 3,
3372 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
3373 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3379 || (roff
- 4 + 16) > input_section
->size
)
3381 memcpy (contents
+ roff
- 4,
3382 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3389 || (roff
- 3 + 15) > input_section
->size
)
3391 memcpy (contents
+ roff
- 3,
3392 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3395 bfd_put_32 (output_bfd
,
3396 elf_x86_64_tpoff (info
, relocation
),
3397 contents
+ roff
+ 8 + largepic
);
3398 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
3399 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
3404 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3406 /* GDesc -> LE transition.
3407 It's originally something like:
3408 leaq x@tlsdesc(%rip), %rax
3411 movl $x@tpoff, %rax. */
3413 unsigned int val
, type
;
3417 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3418 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3419 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
3420 contents
+ roff
- 3);
3421 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
3422 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3423 contents
+ roff
- 1);
3424 bfd_put_32 (output_bfd
,
3425 elf_x86_64_tpoff (info
, relocation
),
3429 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3431 /* GDesc -> LE transition.
3436 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3437 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3440 else if (r_type
== R_X86_64_GOTTPOFF
)
3442 /* IE->LE transition:
3443 For 64bit, originally it can be one of:
3444 movq foo@gottpoff(%rip), %reg
3445 addq foo@gottpoff(%rip), %reg
3448 leaq foo(%reg), %reg
3450 For 32bit, originally it can be one of:
3451 movq foo@gottpoff(%rip), %reg
3452 addl foo@gottpoff(%rip), %reg
3455 leal foo(%reg), %reg
3458 unsigned int val
, type
, reg
;
3461 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3468 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3469 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3478 bfd_put_8 (output_bfd
, 0x49,
3479 contents
+ roff
- 3);
3481 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3485 bfd_put_8 (output_bfd
, 0x41,
3486 contents
+ roff
- 3);
3488 bfd_put_8 (output_bfd
, 0xc7,
3489 contents
+ roff
- 2);
3490 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3491 contents
+ roff
- 1);
3495 /* addq/addl -> addq/addl - addressing with %rsp/%r12
3501 bfd_put_8 (output_bfd
, 0x49,
3502 contents
+ roff
- 3);
3504 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3508 bfd_put_8 (output_bfd
, 0x41,
3509 contents
+ roff
- 3);
3511 bfd_put_8 (output_bfd
, 0x81,
3512 contents
+ roff
- 2);
3513 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3514 contents
+ roff
- 1);
3518 /* addq/addl -> leaq/leal */
3523 bfd_put_8 (output_bfd
, 0x4d,
3524 contents
+ roff
- 3);
3526 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3530 bfd_put_8 (output_bfd
, 0x45,
3531 contents
+ roff
- 3);
3533 bfd_put_8 (output_bfd
, 0x8d,
3534 contents
+ roff
- 2);
3535 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
3536 contents
+ roff
- 1);
3538 bfd_put_32 (output_bfd
,
3539 elf_x86_64_tpoff (info
, relocation
),
3547 if (htab
->elf
.sgot
== NULL
)
3552 off
= h
->got
.offset
;
3553 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
3557 if (local_got_offsets
== NULL
)
3560 off
= local_got_offsets
[r_symndx
];
3561 offplt
= local_tlsdesc_gotents
[r_symndx
];
3568 Elf_Internal_Rela outrel
;
3572 if (htab
->elf
.srelgot
== NULL
)
3575 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3577 if (GOT_TLS_GDESC_P (tls_type
))
3579 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
3580 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
3581 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
3582 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3583 + htab
->elf
.sgotplt
->output_offset
3585 + htab
->sgotplt_jump_table_size
);
3586 sreloc
= htab
->elf
.srelplt
;
3588 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3590 outrel
.r_addend
= 0;
3591 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3594 sreloc
= htab
->elf
.srelgot
;
3596 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3597 + htab
->elf
.sgot
->output_offset
+ off
);
3599 if (GOT_TLS_GD_P (tls_type
))
3600 dr_type
= R_X86_64_DTPMOD64
;
3601 else if (GOT_TLS_GDESC_P (tls_type
))
3604 dr_type
= R_X86_64_TPOFF64
;
3606 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
3607 outrel
.r_addend
= 0;
3608 if ((dr_type
== R_X86_64_TPOFF64
3609 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
3610 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3611 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
3613 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3615 if (GOT_TLS_GD_P (tls_type
))
3619 BFD_ASSERT (! unresolved_reloc
);
3620 bfd_put_64 (output_bfd
,
3621 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3622 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3626 bfd_put_64 (output_bfd
, 0,
3627 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3628 outrel
.r_info
= htab
->r_info (indx
,
3630 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
3631 elf_append_rela (output_bfd
, sreloc
,
3640 local_got_offsets
[r_symndx
] |= 1;
3643 if (off
>= (bfd_vma
) -2
3644 && ! GOT_TLS_GDESC_P (tls_type
))
3646 if (r_type_tls
== r_type
)
3648 if (r_type
== R_X86_64_GOTPC32_TLSDESC
3649 || r_type
== R_X86_64_TLSDESC_CALL
)
3650 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3651 + htab
->elf
.sgotplt
->output_offset
3652 + offplt
+ htab
->sgotplt_jump_table_size
;
3654 relocation
= htab
->elf
.sgot
->output_section
->vma
3655 + htab
->elf
.sgot
->output_offset
+ off
;
3656 unresolved_reloc
= FALSE
;
3660 bfd_vma roff
= rel
->r_offset
;
3662 if (r_type
== R_X86_64_TLSGD
)
3664 /* GD->IE transition. For 64bit, change
3665 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3666 .word 0x6666; rex64; call __tls_get_addr@PLT
3668 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3670 call *__tls_get_addr@GOTPCREL(%rip
3671 which may be converted to
3672 addr32 call __tls_get_addr
3675 addq foo@gottpoff(%rip), %rax
3677 leaq foo@tlsgd(%rip), %rdi
3678 .word 0x6666; rex64; call __tls_get_addr@PLT
3680 leaq foo@tlsgd(%rip), %rdi
3682 call *__tls_get_addr@GOTPCREL(%rip)
3683 which may be converted to
3684 addr32 call __tls_get_addr
3687 addq foo@gottpoff(%rip), %rax
3688 For largepic, change:
3689 leaq foo@tlsgd(%rip), %rdi
3690 movabsq $__tls_get_addr@pltoff, %rax
3695 addq foo@gottpoff(%rax), %rax
3696 nopw 0x0(%rax,%rax,1) */
3698 if (ABI_64_P (output_bfd
))
3700 if (contents
[roff
+ 5] == 0xb8)
3703 || (roff
- 3 + 22) > input_section
->size
)
3705 memcpy (contents
+ roff
- 3,
3706 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
3707 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3713 || (roff
- 4 + 16) > input_section
->size
)
3715 memcpy (contents
+ roff
- 4,
3716 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3723 || (roff
- 3 + 15) > input_section
->size
)
3725 memcpy (contents
+ roff
- 3,
3726 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3730 relocation
= (htab
->elf
.sgot
->output_section
->vma
3731 + htab
->elf
.sgot
->output_offset
+ off
3734 - input_section
->output_section
->vma
3735 - input_section
->output_offset
3737 bfd_put_32 (output_bfd
, relocation
,
3738 contents
+ roff
+ 8 + largepic
);
3739 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
3744 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3746 /* GDesc -> IE transition.
3747 It's originally something like:
3748 leaq x@tlsdesc(%rip), %rax
3751 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
3753 /* Now modify the instruction as appropriate. To
3754 turn a leaq into a movq in the form we use it, it
3755 suffices to change the second byte from 0x8d to
3759 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3761 bfd_put_32 (output_bfd
,
3762 htab
->elf
.sgot
->output_section
->vma
3763 + htab
->elf
.sgot
->output_offset
+ off
3765 - input_section
->output_section
->vma
3766 - input_section
->output_offset
3771 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3773 /* GDesc -> IE transition.
3780 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3781 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3789 case R_X86_64_TLSLD
:
3790 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3791 input_section
, contents
,
3792 symtab_hdr
, sym_hashes
,
3793 &r_type
, GOT_UNKNOWN
, rel
,
3794 relend
, h
, r_symndx
, TRUE
))
3797 if (r_type
!= R_X86_64_TLSLD
)
3799 /* LD->LE transition:
3800 leaq foo@tlsld(%rip), %rdi
3801 call __tls_get_addr@PLT
3802 For 64bit, we change it into:
3803 .word 0x6666; .byte 0x66; movq %fs:0, %rax
3804 For 32bit, we change it into:
3805 nopl 0x0(%rax); movl %fs:0, %eax
3807 leaq foo@tlsld(%rip), %rdi;
3808 call *__tls_get_addr@GOTPCREL(%rip)
3809 which may be converted to
3810 addr32 call __tls_get_addr
3811 For 64bit, we change it into:
3812 .word 0x6666; .word 0x6666; movq %fs:0, %rax
3813 For 32bit, we change it into:
3814 nopw 0x0(%rax); movl %fs:0, %eax
3815 For largepic, change:
3816 leaq foo@tlsgd(%rip), %rdi
3817 movabsq $__tls_get_addr@pltoff, %rax
3821 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
3824 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
3825 if (ABI_64_P (output_bfd
))
3827 if ((rel
->r_offset
+ 5) >= input_section
->size
)
3829 if (contents
[rel
->r_offset
+ 5] == 0xb8)
3831 if (rel
->r_offset
< 3
3832 || (rel
->r_offset
- 3 + 22) > input_section
->size
)
3834 memcpy (contents
+ rel
->r_offset
- 3,
3835 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
3836 "\x64\x48\x8b\x04\x25\0\0\0", 22);
3838 else if (contents
[rel
->r_offset
+ 4] == 0xff
3839 || contents
[rel
->r_offset
+ 4] == 0x67)
3841 if (rel
->r_offset
< 3
3842 || (rel
->r_offset
- 3 + 13) > input_section
->size
)
3844 memcpy (contents
+ rel
->r_offset
- 3,
3845 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
3851 if (rel
->r_offset
< 3
3852 || (rel
->r_offset
- 3 + 12) > input_section
->size
)
3854 memcpy (contents
+ rel
->r_offset
- 3,
3855 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3860 if ((rel
->r_offset
+ 4) >= input_section
->size
)
3862 if (contents
[rel
->r_offset
+ 4] == 0xff)
3864 if (rel
->r_offset
< 3
3865 || (rel
->r_offset
- 3 + 13) > input_section
->size
)
3867 memcpy (contents
+ rel
->r_offset
- 3,
3868 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
3873 if (rel
->r_offset
< 3
3874 || (rel
->r_offset
- 3 + 12) > input_section
->size
)
3876 memcpy (contents
+ rel
->r_offset
- 3,
3877 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
3880 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
3881 and R_X86_64_PLTOFF64. */
3887 if (htab
->elf
.sgot
== NULL
)
3890 off
= htab
->tls_ld_or_ldm_got
.offset
;
3895 Elf_Internal_Rela outrel
;
3897 if (htab
->elf
.srelgot
== NULL
)
3900 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3901 + htab
->elf
.sgot
->output_offset
+ off
);
3903 bfd_put_64 (output_bfd
, 0,
3904 htab
->elf
.sgot
->contents
+ off
);
3905 bfd_put_64 (output_bfd
, 0,
3906 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3907 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
3908 outrel
.r_addend
= 0;
3909 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
3911 htab
->tls_ld_or_ldm_got
.offset
|= 1;
3913 relocation
= htab
->elf
.sgot
->output_section
->vma
3914 + htab
->elf
.sgot
->output_offset
+ off
;
3915 unresolved_reloc
= FALSE
;
3918 case R_X86_64_DTPOFF32
:
3919 if (!bfd_link_executable (info
)
3920 || (input_section
->flags
& SEC_CODE
) == 0)
3921 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3923 relocation
= elf_x86_64_tpoff (info
, relocation
);
3926 case R_X86_64_TPOFF32
:
3927 case R_X86_64_TPOFF64
:
3928 BFD_ASSERT (bfd_link_executable (info
));
3929 relocation
= elf_x86_64_tpoff (info
, relocation
);
3932 case R_X86_64_DTPOFF64
:
3933 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
3934 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3941 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3942 because such sections are not SEC_ALLOC and thus ld.so will
3943 not process them. */
3944 if (unresolved_reloc
3945 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3947 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3948 rel
->r_offset
) != (bfd_vma
) -1)
3953 sec
= h
->root
.u
.def
.section
;
3954 if ((info
->nocopyreloc
3955 || (eh
->def_protected
3956 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
3957 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))
3958 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3959 h
, NULL
, NULL
, howto
);
3964 /* xgettext:c-format */
3965 (_("%pB(%pA+%#" PRIx64
"): "
3966 "unresolvable %s relocation against symbol `%s'"),
3969 (uint64_t) rel
->r_offset
,
3971 h
->root
.root
.string
);
3977 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3978 contents
, rel
->r_offset
,
3979 relocation
, rel
->r_addend
);
3981 check_relocation_error
:
3982 if (r
!= bfd_reloc_ok
)
3987 name
= h
->root
.root
.string
;
3990 name
= bfd_elf_string_from_elf_section (input_bfd
,
3991 symtab_hdr
->sh_link
,
3996 name
= bfd_section_name (input_bfd
, sec
);
3999 if (r
== bfd_reloc_overflow
)
4001 if (converted_reloc
)
4003 info
->callbacks
->einfo
4004 (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n"));
4007 (*info
->callbacks
->reloc_overflow
)
4008 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4009 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4014 /* xgettext:c-format */
4015 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
4016 input_bfd
, input_section
,
4017 (uint64_t) rel
->r_offset
, name
, (int) r
);
4028 Elf_Internal_Shdr
*rel_hdr
;
4029 size_t deleted
= rel
- wrel
;
4031 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
4032 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
4033 if (rel_hdr
->sh_size
== 0)
4035 /* It is too late to remove an empty reloc section. Leave
4037 ??? What is wrong with an empty section??? */
4038 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
4041 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
4042 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
4043 input_section
->reloc_count
-= deleted
;
4049 /* Finish up dynamic symbol handling. We set the contents of various
4050 dynamic sections here. */
4053 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4054 struct bfd_link_info
*info
,
4055 struct elf_link_hash_entry
*h
,
4056 Elf_Internal_Sym
*sym
)
4058 struct elf_x86_link_hash_table
*htab
;
4059 bfd_boolean use_plt_second
;
4060 struct elf_x86_link_hash_entry
*eh
;
4061 bfd_boolean local_undefweak
;
4063 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4067 /* Use the second PLT section only if there is .plt section. */
4068 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
4070 eh
= (struct elf_x86_link_hash_entry
*) h
;
4071 if (eh
->no_finish_dynamic_symbol
)
4074 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4075 resolved undefined weak symbols in executable so that their
4076 references have value 0 at run-time. */
4077 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
4079 if (h
->plt
.offset
!= (bfd_vma
) -1)
4082 bfd_vma got_offset
, plt_offset
;
4083 Elf_Internal_Rela rela
;
4085 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
4086 const struct elf_backend_data
*bed
;
4087 bfd_vma plt_got_pcrel_offset
;
4089 /* When building a static executable, use .iplt, .igot.plt and
4090 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4091 if (htab
->elf
.splt
!= NULL
)
4093 plt
= htab
->elf
.splt
;
4094 gotplt
= htab
->elf
.sgotplt
;
4095 relplt
= htab
->elf
.srelplt
;
4099 plt
= htab
->elf
.iplt
;
4100 gotplt
= htab
->elf
.igotplt
;
4101 relplt
= htab
->elf
.irelplt
;
4104 VERIFY_PLT_ENTRY (info
, h
, plt
, gotplt
, relplt
, local_undefweak
)
4106 /* Get the index in the procedure linkage table which
4107 corresponds to this symbol. This is the index of this symbol
4108 in all the symbols for which we are making plt entries. The
4109 first entry in the procedure linkage table is reserved.
4111 Get the offset into the .got table of the entry that
4112 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4113 bytes. The first three are reserved for the dynamic linker.
4115 For static executables, we don't reserve anything. */
4117 if (plt
== htab
->elf
.splt
)
4119 got_offset
= (h
->plt
.offset
/ htab
->plt
.plt_entry_size
4120 - htab
->plt
.has_plt0
);
4121 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4125 got_offset
= h
->plt
.offset
/ htab
->plt
.plt_entry_size
;
4126 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4129 /* Fill in the entry in the procedure linkage table. */
4130 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
4131 htab
->plt
.plt_entry_size
);
4134 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
4135 htab
->non_lazy_plt
->plt_entry
,
4136 htab
->non_lazy_plt
->plt_entry_size
);
4138 resolved_plt
= htab
->plt_second
;
4139 plt_offset
= eh
->plt_second
.offset
;
4144 plt_offset
= h
->plt
.offset
;
4147 /* Insert the relocation positions of the plt section. */
4149 /* Put offset the PC-relative instruction referring to the GOT entry,
4150 subtracting the size of that instruction. */
4151 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
4152 + gotplt
->output_offset
4154 - resolved_plt
->output_section
->vma
4155 - resolved_plt
->output_offset
4157 - htab
->plt
.plt_got_insn_size
);
4159 /* Check PC-relative offset overflow in PLT entry. */
4160 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
4161 /* xgettext:c-format */
4162 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"),
4163 output_bfd
, h
->root
.root
.string
);
4165 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
4166 (resolved_plt
->contents
+ plt_offset
4167 + htab
->plt
.plt_got_offset
));
4169 /* Fill in the entry in the global offset table, initially this
4170 points to the second part of the PLT entry. Leave the entry
4171 as zero for undefined weak symbol in PIE. No PLT relocation
4172 against undefined weak symbol in PIE. */
4173 if (!local_undefweak
)
4175 if (htab
->plt
.has_plt0
)
4176 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4177 + plt
->output_offset
4179 + htab
->lazy_plt
->plt_lazy_offset
),
4180 gotplt
->contents
+ got_offset
);
4182 /* Fill in the entry in the .rela.plt section. */
4183 rela
.r_offset
= (gotplt
->output_section
->vma
4184 + gotplt
->output_offset
4186 if (PLT_LOCAL_IFUNC_P (info
, h
))
4188 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4189 h
->root
.root
.string
,
4190 h
->root
.u
.def
.section
->owner
);
4192 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4193 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4194 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4195 rela
.r_addend
= (h
->root
.u
.def
.value
4196 + h
->root
.u
.def
.section
->output_section
->vma
4197 + h
->root
.u
.def
.section
->output_offset
);
4198 /* R_X86_64_IRELATIVE comes last. */
4199 plt_index
= htab
->next_irelative_index
--;
4203 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4205 plt_index
= htab
->next_jump_slot_index
++;
4208 /* Don't fill the second and third slots in PLT entry for
4209 static executables nor without PLT0. */
4210 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
4213 = h
->plt
.offset
+ htab
->lazy_plt
->plt_plt_insn_end
;
4215 /* Put relocation index. */
4216 bfd_put_32 (output_bfd
, plt_index
,
4217 (plt
->contents
+ h
->plt
.offset
4218 + htab
->lazy_plt
->plt_reloc_offset
));
4220 /* Put offset for jmp .PLT0 and check for overflow. We don't
4221 check relocation index for overflow since branch displacement
4222 will overflow first. */
4223 if (plt0_offset
> 0x80000000)
4224 /* xgettext:c-format */
4225 info
->callbacks
->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"),
4226 output_bfd
, h
->root
.root
.string
);
4227 bfd_put_32 (output_bfd
, - plt0_offset
,
4228 (plt
->contents
+ h
->plt
.offset
4229 + htab
->lazy_plt
->plt_plt_offset
));
4232 bed
= get_elf_backend_data (output_bfd
);
4233 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4234 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4237 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4239 bfd_vma got_offset
, plt_offset
;
4240 asection
*plt
, *got
;
4241 bfd_boolean got_after_plt
;
4242 int32_t got_pcrel_offset
;
4244 /* Set the entry in the GOT procedure linkage table. */
4245 plt
= htab
->plt_got
;
4246 got
= htab
->elf
.sgot
;
4247 got_offset
= h
->got
.offset
;
4249 if (got_offset
== (bfd_vma
) -1
4250 || (h
->type
== STT_GNU_IFUNC
&& h
->def_regular
)
4255 /* Use the non-lazy PLT entry template for the GOT PLT since they
4256 are the identical. */
4257 /* Fill in the entry in the GOT procedure linkage table. */
4258 plt_offset
= eh
->plt_got
.offset
;
4259 memcpy (plt
->contents
+ plt_offset
,
4260 htab
->non_lazy_plt
->plt_entry
,
4261 htab
->non_lazy_plt
->plt_entry_size
);
4263 /* Put offset the PC-relative instruction referring to the GOT
4264 entry, subtracting the size of that instruction. */
4265 got_pcrel_offset
= (got
->output_section
->vma
4266 + got
->output_offset
4268 - plt
->output_section
->vma
4269 - plt
->output_offset
4271 - htab
->non_lazy_plt
->plt_got_insn_size
);
4273 /* Check PC-relative offset overflow in GOT PLT entry. */
4274 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
4275 if ((got_after_plt
&& got_pcrel_offset
< 0)
4276 || (!got_after_plt
&& got_pcrel_offset
> 0))
4277 /* xgettext:c-format */
4278 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
4279 output_bfd
, h
->root
.root
.string
);
4281 bfd_put_32 (output_bfd
, got_pcrel_offset
,
4282 (plt
->contents
+ plt_offset
4283 + htab
->non_lazy_plt
->plt_got_offset
));
4286 if (!local_undefweak
4288 && (h
->plt
.offset
!= (bfd_vma
) -1
4289 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4291 /* Mark the symbol as undefined, rather than as defined in
4292 the .plt section. Leave the value if there were any
4293 relocations where pointer equality matters (this is a clue
4294 for the dynamic linker, to make function pointer
4295 comparisons work between an application and shared
4296 library), otherwise set it to zero. If a function is only
4297 called from a binary, there is no need to slow down
4298 shared libraries because of that. */
4299 sym
->st_shndx
= SHN_UNDEF
;
4300 if (!h
->pointer_equality_needed
)
4304 _bfd_x86_elf_link_fixup_ifunc_symbol (info
, htab
, h
, sym
);
4306 /* Don't generate dynamic GOT relocation against undefined weak
4307 symbol in executable. */
4308 if (h
->got
.offset
!= (bfd_vma
) -1
4309 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h
)->tls_type
)
4310 && elf_x86_hash_entry (h
)->tls_type
!= GOT_TLS_IE
4311 && !local_undefweak
)
4313 Elf_Internal_Rela rela
;
4314 asection
*relgot
= htab
->elf
.srelgot
;
4316 /* This symbol has an entry in the global offset table. Set it
4318 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4321 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4322 + htab
->elf
.sgot
->output_offset
4323 + (h
->got
.offset
&~ (bfd_vma
) 1));
4325 /* If this is a static link, or it is a -Bsymbolic link and the
4326 symbol is defined locally or was forced to be local because
4327 of a version file, we just want to emit a RELATIVE reloc.
4328 The entry in the global offset table will already have been
4329 initialized in the relocate_section function. */
4331 && h
->type
== STT_GNU_IFUNC
)
4333 if (h
->plt
.offset
== (bfd_vma
) -1)
4335 /* STT_GNU_IFUNC is referenced without PLT. */
4336 if (htab
->elf
.splt
== NULL
)
4338 /* use .rel[a].iplt section to store .got relocations
4339 in static executable. */
4340 relgot
= htab
->elf
.irelplt
;
4342 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4344 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4345 h
->root
.root
.string
,
4346 h
->root
.u
.def
.section
->owner
);
4348 rela
.r_info
= htab
->r_info (0,
4349 R_X86_64_IRELATIVE
);
4350 rela
.r_addend
= (h
->root
.u
.def
.value
4351 + h
->root
.u
.def
.section
->output_section
->vma
4352 + h
->root
.u
.def
.section
->output_offset
);
4357 else if (bfd_link_pic (info
))
4359 /* Generate R_X86_64_GLOB_DAT. */
4367 if (!h
->pointer_equality_needed
)
4370 /* For non-shared object, we can't use .got.plt, which
4371 contains the real function addres if we need pointer
4372 equality. We load the GOT entry with the PLT entry. */
4373 if (htab
->plt_second
!= NULL
)
4375 plt
= htab
->plt_second
;
4376 plt_offset
= eh
->plt_second
.offset
;
4380 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4381 plt_offset
= h
->plt
.offset
;
4383 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4384 + plt
->output_offset
4386 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4390 else if (bfd_link_pic (info
)
4391 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4393 if (!SYMBOL_DEFINED_NON_SHARED_P (h
))
4395 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4396 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4397 rela
.r_addend
= (h
->root
.u
.def
.value
4398 + h
->root
.u
.def
.section
->output_section
->vma
4399 + h
->root
.u
.def
.section
->output_offset
);
4403 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4405 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4406 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4407 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4411 elf_append_rela (output_bfd
, relgot
, &rela
);
4416 Elf_Internal_Rela rela
;
4419 /* This symbol needs a copy reloc. Set it up. */
4420 VERIFY_COPY_RELOC (h
, htab
)
4422 rela
.r_offset
= (h
->root
.u
.def
.value
4423 + h
->root
.u
.def
.section
->output_section
->vma
4424 + h
->root
.u
.def
.section
->output_offset
);
4425 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4427 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
4428 s
= htab
->elf
.sreldynrelro
;
4430 s
= htab
->elf
.srelbss
;
4431 elf_append_rela (output_bfd
, s
, &rela
);
4437 /* Finish up local dynamic symbol handling. We set the contents of
4438 various dynamic sections here. */
4441 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4443 struct elf_link_hash_entry
*h
4444 = (struct elf_link_hash_entry
*) *slot
;
4445 struct bfd_link_info
*info
4446 = (struct bfd_link_info
*) inf
;
4448 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4452 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4453 here since undefined weak symbol may not be dynamic and may not be
4454 called for elf_x86_64_finish_dynamic_symbol. */
4457 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
4460 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
4461 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
4463 if (h
->root
.type
!= bfd_link_hash_undefweak
4464 || h
->dynindx
!= -1)
4467 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4471 /* Used to decide how to sort relocs in an optimal manner for the
4472 dynamic linker, before writing them out. */
4474 static enum elf_reloc_type_class
4475 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info
,
4476 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4477 const Elf_Internal_Rela
*rela
)
4479 bfd
*abfd
= info
->output_bfd
;
4480 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4481 struct elf_x86_link_hash_table
*htab
4482 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4484 if (htab
->elf
.dynsym
!= NULL
4485 && htab
->elf
.dynsym
->contents
!= NULL
)
4487 /* Check relocation against STT_GNU_IFUNC symbol if there are
4489 unsigned long r_symndx
= htab
->r_sym (rela
->r_info
);
4490 if (r_symndx
!= STN_UNDEF
)
4492 Elf_Internal_Sym sym
;
4493 if (!bed
->s
->swap_symbol_in (abfd
,
4494 (htab
->elf
.dynsym
->contents
4495 + r_symndx
* bed
->s
->sizeof_sym
),
4499 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
4500 return reloc_class_ifunc
;
4504 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4506 case R_X86_64_IRELATIVE
:
4507 return reloc_class_ifunc
;
4508 case R_X86_64_RELATIVE
:
4509 case R_X86_64_RELATIVE64
:
4510 return reloc_class_relative
;
4511 case R_X86_64_JUMP_SLOT
:
4512 return reloc_class_plt
;
4514 return reloc_class_copy
;
4516 return reloc_class_normal
;
4520 /* Finish up the dynamic sections. */
4523 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4524 struct bfd_link_info
*info
)
4526 struct elf_x86_link_hash_table
*htab
;
4528 htab
= _bfd_x86_elf_finish_dynamic_sections (output_bfd
, info
);
4532 if (! htab
->elf
.dynamic_sections_created
)
4535 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4537 elf_section_data (htab
->elf
.splt
->output_section
)
4538 ->this_hdr
.sh_entsize
= htab
->plt
.plt_entry_size
;
4540 if (htab
->plt
.has_plt0
)
4542 /* Fill in the special first entry in the procedure linkage
4544 memcpy (htab
->elf
.splt
->contents
,
4545 htab
->lazy_plt
->plt0_entry
,
4546 htab
->lazy_plt
->plt0_entry_size
);
4547 /* Add offset for pushq GOT+8(%rip), since the instruction
4548 uses 6 bytes subtract this value. */
4549 bfd_put_32 (output_bfd
,
4550 (htab
->elf
.sgotplt
->output_section
->vma
4551 + htab
->elf
.sgotplt
->output_offset
4553 - htab
->elf
.splt
->output_section
->vma
4554 - htab
->elf
.splt
->output_offset
4556 (htab
->elf
.splt
->contents
4557 + htab
->lazy_plt
->plt0_got1_offset
));
4558 /* Add offset for the PC-relative instruction accessing
4559 GOT+16, subtracting the offset to the end of that
4561 bfd_put_32 (output_bfd
,
4562 (htab
->elf
.sgotplt
->output_section
->vma
4563 + htab
->elf
.sgotplt
->output_offset
4565 - htab
->elf
.splt
->output_section
->vma
4566 - htab
->elf
.splt
->output_offset
4567 - htab
->lazy_plt
->plt0_got2_insn_end
),
4568 (htab
->elf
.splt
->contents
4569 + htab
->lazy_plt
->plt0_got2_offset
));
4572 if (htab
->tlsdesc_plt
)
4574 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4575 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
4577 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
4578 htab
->lazy_plt
->plt_tlsdesc_entry
,
4579 htab
->lazy_plt
->plt_tlsdesc_entry_size
);
4581 /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4
4582 bytes and the instruction uses 6 bytes, subtract these
4584 bfd_put_32 (output_bfd
,
4585 (htab
->elf
.sgotplt
->output_section
->vma
4586 + htab
->elf
.sgotplt
->output_offset
4588 - htab
->elf
.splt
->output_section
->vma
4589 - htab
->elf
.splt
->output_offset
4591 - htab
->lazy_plt
->plt_tlsdesc_got1_insn_end
),
4592 (htab
->elf
.splt
->contents
4594 + htab
->lazy_plt
->plt_tlsdesc_got1_offset
));
4595 /* Add offset for indirect branch via GOT+TDG, where TDG
4596 stands for htab->tlsdesc_got, subtracting the offset
4597 to the end of that instruction. */
4598 bfd_put_32 (output_bfd
,
4599 (htab
->elf
.sgot
->output_section
->vma
4600 + htab
->elf
.sgot
->output_offset
4602 - htab
->elf
.splt
->output_section
->vma
4603 - htab
->elf
.splt
->output_offset
4605 - htab
->lazy_plt
->plt_tlsdesc_got2_insn_end
),
4606 (htab
->elf
.splt
->contents
4608 + htab
->lazy_plt
->plt_tlsdesc_got2_offset
));
4612 /* Fill PLT entries for undefined weak symbols in PIE. */
4613 if (bfd_link_pie (info
))
4614 bfd_hash_traverse (&info
->hash
->table
,
4615 elf_x86_64_pie_finish_undefweak_symbol
,
4621 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4622 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4623 It has to be done before elf_link_sort_relocs is called so that
4624 dynamic relocations are properly sorted. */
4627 elf_x86_64_output_arch_local_syms
4628 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4629 struct bfd_link_info
*info
,
4630 void *flaginfo ATTRIBUTE_UNUSED
,
4631 int (*func
) (void *, const char *,
4634 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
4636 struct elf_x86_link_hash_table
*htab
4637 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4641 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4642 htab_traverse (htab
->loc_hash_table
,
4643 elf_x86_64_finish_local_dynamic_symbol
,
4649 /* Forward declaration. */
4650 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
;
4652 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4653 dynamic relocations. */
4656 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
4657 long symcount ATTRIBUTE_UNUSED
,
4658 asymbol
**syms ATTRIBUTE_UNUSED
,
4665 bfd_byte
*plt_contents
;
4667 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
4668 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
4669 const struct elf_x86_lazy_plt_layout
*lazy_bnd_plt
;
4670 const struct elf_x86_non_lazy_plt_layout
*non_lazy_bnd_plt
;
4671 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
4672 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
4674 enum elf_x86_plt_type plt_type
;
4675 struct elf_x86_plt plts
[] =
4677 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
4678 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
4679 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4680 { ".plt.bnd", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4681 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
4686 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
4689 if (dynsymcount
<= 0)
4692 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
4696 if (get_elf_x86_backend_data (abfd
)->target_os
!= is_nacl
)
4698 lazy_plt
= &elf_x86_64_lazy_plt
;
4699 non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
4700 lazy_bnd_plt
= &elf_x86_64_lazy_bnd_plt
;
4701 non_lazy_bnd_plt
= &elf_x86_64_non_lazy_bnd_plt
;
4702 if (ABI_64_P (abfd
))
4704 lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
4705 non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
4709 lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
4710 non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
4715 lazy_plt
= &elf_x86_64_nacl_plt
;
4716 non_lazy_plt
= NULL
;
4717 lazy_bnd_plt
= NULL
;
4718 non_lazy_bnd_plt
= NULL
;
4719 lazy_ibt_plt
= NULL
;
4720 non_lazy_ibt_plt
= NULL
;
4724 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
4726 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
4727 if (plt
== NULL
|| plt
->size
== 0)
4730 /* Get the PLT section contents. */
4731 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
4732 if (plt_contents
== NULL
)
4734 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
4735 plt_contents
, 0, plt
->size
))
4737 free (plt_contents
);
4741 /* Check what kind of PLT it is. */
4742 plt_type
= plt_unknown
;
4743 if (plts
[j
].type
== plt_unknown
4744 && (plt
->size
>= (lazy_plt
->plt_entry_size
4745 + lazy_plt
->plt_entry_size
)))
4747 /* Match lazy PLT first. Need to check the first two
4749 if ((memcmp (plt_contents
, lazy_plt
->plt0_entry
,
4750 lazy_plt
->plt0_got1_offset
) == 0)
4751 && (memcmp (plt_contents
+ 6, lazy_plt
->plt0_entry
+ 6,
4753 plt_type
= plt_lazy
;
4754 else if (lazy_bnd_plt
!= NULL
4755 && (memcmp (plt_contents
, lazy_bnd_plt
->plt0_entry
,
4756 lazy_bnd_plt
->plt0_got1_offset
) == 0)
4757 && (memcmp (plt_contents
+ 6,
4758 lazy_bnd_plt
->plt0_entry
+ 6, 3) == 0))
4760 plt_type
= plt_lazy
| plt_second
;
4761 /* The fist entry in the lazy IBT PLT is the same as the
4763 if ((memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
4764 lazy_ibt_plt
->plt_entry
,
4765 lazy_ibt_plt
->plt_got_offset
) == 0))
4766 lazy_plt
= lazy_ibt_plt
;
4768 lazy_plt
= lazy_bnd_plt
;
4772 if (non_lazy_plt
!= NULL
4773 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
4774 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
4776 /* Match non-lazy PLT. */
4777 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
4778 non_lazy_plt
->plt_got_offset
) == 0)
4779 plt_type
= plt_non_lazy
;
4782 if (plt_type
== plt_unknown
|| plt_type
== plt_second
)
4784 if (non_lazy_bnd_plt
!= NULL
4785 && plt
->size
>= non_lazy_bnd_plt
->plt_entry_size
4786 && (memcmp (plt_contents
, non_lazy_bnd_plt
->plt_entry
,
4787 non_lazy_bnd_plt
->plt_got_offset
) == 0))
4789 /* Match BND PLT. */
4790 plt_type
= plt_second
;
4791 non_lazy_plt
= non_lazy_bnd_plt
;
4793 else if (non_lazy_ibt_plt
!= NULL
4794 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
4795 && (memcmp (plt_contents
,
4796 non_lazy_ibt_plt
->plt_entry
,
4797 non_lazy_ibt_plt
->plt_got_offset
) == 0))
4799 /* Match IBT PLT. */
4800 plt_type
= plt_second
;
4801 non_lazy_plt
= non_lazy_ibt_plt
;
4805 if (plt_type
== plt_unknown
)
4807 free (plt_contents
);
4812 plts
[j
].type
= plt_type
;
4814 if ((plt_type
& plt_lazy
))
4816 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
4817 plts
[j
].plt_got_insn_size
= lazy_plt
->plt_got_insn_size
;
4818 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
4819 /* Skip PLT0 in lazy PLT. */
4824 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
4825 plts
[j
].plt_got_insn_size
= non_lazy_plt
->plt_got_insn_size
;
4826 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
4830 /* Skip lazy PLT when the second PLT is used. */
4831 if (plt_type
== (plt_lazy
| plt_second
))
4835 n
= plt
->size
/ plts
[j
].plt_entry_size
;
4840 plts
[j
].contents
= plt_contents
;
4843 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
4844 (bfd_vma
) 0, plts
, dynsyms
,
4848 /* Handle an x86-64 specific section when reading an object file. This
4849 is called when elfcode.h finds a section with an unknown type. */
4852 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
4853 const char *name
, int shindex
)
4855 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4858 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4864 /* Hook called by the linker routine which adds symbols from an object
4865 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4869 elf_x86_64_add_symbol_hook (bfd
*abfd
,
4870 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4871 Elf_Internal_Sym
*sym
,
4872 const char **namep ATTRIBUTE_UNUSED
,
4873 flagword
*flagsp ATTRIBUTE_UNUSED
,
4879 switch (sym
->st_shndx
)
4881 case SHN_X86_64_LCOMMON
:
4882 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
4885 lcomm
= bfd_make_section_with_flags (abfd
,
4889 | SEC_LINKER_CREATED
));
4892 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
4895 *valp
= sym
->st_size
;
4903 /* Given a BFD section, try to locate the corresponding ELF section
4907 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
4908 asection
*sec
, int *index_return
)
4910 if (sec
== &_bfd_elf_large_com_section
)
4912 *index_return
= SHN_X86_64_LCOMMON
;
4918 /* Process a symbol. */
4921 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
4924 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
4926 switch (elfsym
->internal_elf_sym
.st_shndx
)
4928 case SHN_X86_64_LCOMMON
:
4929 asym
->section
= &_bfd_elf_large_com_section
;
4930 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
4931 /* Common symbol doesn't set BSF_GLOBAL. */
4932 asym
->flags
&= ~BSF_GLOBAL
;
4938 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
4940 return (sym
->st_shndx
== SHN_COMMON
4941 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
4945 elf_x86_64_common_section_index (asection
*sec
)
4947 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
4950 return SHN_X86_64_LCOMMON
;
4954 elf_x86_64_common_section (asection
*sec
)
4956 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
4957 return bfd_com_section_ptr
;
4959 return &_bfd_elf_large_com_section
;
4963 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
4964 const Elf_Internal_Sym
*sym
,
4969 const asection
*oldsec
)
4971 /* A normal common symbol and a large common symbol result in a
4972 normal common symbol. We turn the large common symbol into a
4975 && h
->root
.type
== bfd_link_hash_common
4977 && bfd_is_com_section (*psec
)
4980 if (sym
->st_shndx
== SHN_COMMON
4981 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
4983 h
->root
.u
.c
.p
->section
4984 = bfd_make_section_old_way (oldbfd
, "COMMON");
4985 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
4987 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
4988 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
4989 *psec
= bfd_com_section_ptr
;
4996 elf_x86_64_additional_program_headers (bfd
*abfd
,
4997 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5002 /* Check to see if we need a large readonly segment. */
5003 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5004 if (s
&& (s
->flags
& SEC_LOAD
))
5007 /* Check to see if we need a large data segment. Since .lbss sections
5008 is placed right after the .bss section, there should be no need for
5009 a large data segment just because of .lbss. */
5010 s
= bfd_get_section_by_name (abfd
, ".ldata");
5011 if (s
&& (s
->flags
& SEC_LOAD
))
5017 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5020 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5021 const bfd_target
*output
)
5023 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5024 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5025 && _bfd_elf_relocs_compatible (input
, output
));
5028 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
5029 with GNU properties if found. Otherwise, return NULL. */
5032 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info
*info
)
5034 struct elf_x86_init_table init_table
;
5036 if ((int) R_X86_64_standard
>= (int) R_X86_64_converted_reloc_bit
5037 || (int) R_X86_64_max
<= (int) R_X86_64_converted_reloc_bit
5038 || ((int) (R_X86_64_GNU_VTINHERIT
| R_X86_64_converted_reloc_bit
)
5039 != (int) R_X86_64_GNU_VTINHERIT
)
5040 || ((int) (R_X86_64_GNU_VTENTRY
| R_X86_64_converted_reloc_bit
)
5041 != (int) R_X86_64_GNU_VTENTRY
))
5044 /* This is unused for x86-64. */
5045 init_table
.plt0_pad_byte
= 0x90;
5047 if (get_elf_x86_backend_data (info
->output_bfd
)->target_os
!= is_nacl
)
5049 const struct elf_backend_data
*bed
5050 = get_elf_backend_data (info
->output_bfd
);
5051 struct elf_x86_link_hash_table
*htab
5052 = elf_x86_hash_table (info
, bed
->target_id
);
5055 if (htab
->params
->bndplt
)
5057 init_table
.lazy_plt
= &elf_x86_64_lazy_bnd_plt
;
5058 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_bnd_plt
;
5062 init_table
.lazy_plt
= &elf_x86_64_lazy_plt
;
5063 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
5066 if (ABI_64_P (info
->output_bfd
))
5068 init_table
.lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
5069 init_table
.non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
5073 init_table
.lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
5074 init_table
.non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
5079 init_table
.lazy_plt
= &elf_x86_64_nacl_plt
;
5080 init_table
.non_lazy_plt
= NULL
;
5081 init_table
.lazy_ibt_plt
= NULL
;
5082 init_table
.non_lazy_ibt_plt
= NULL
;
5085 if (ABI_64_P (info
->output_bfd
))
5087 init_table
.r_info
= elf64_r_info
;
5088 init_table
.r_sym
= elf64_r_sym
;
5092 init_table
.r_info
= elf32_r_info
;
5093 init_table
.r_sym
= elf32_r_sym
;
5096 return _bfd_x86_elf_link_setup_gnu_properties (info
, &init_table
);
5099 static const struct bfd_elf_special_section
5100 elf_x86_64_special_sections
[]=
5102 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5103 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5104 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5105 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5106 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5107 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5108 { NULL
, 0, 0, 0, 0 }
5111 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5112 #define TARGET_LITTLE_NAME "elf64-x86-64"
5113 #define ELF_ARCH bfd_arch_i386
5114 #define ELF_TARGET_ID X86_64_ELF_DATA
5115 #define ELF_MACHINE_CODE EM_X86_64
5116 #if DEFAULT_LD_Z_SEPARATE_CODE
5117 # define ELF_MAXPAGESIZE 0x1000
5119 # define ELF_MAXPAGESIZE 0x200000
5121 #define ELF_MINPAGESIZE 0x1000
5122 #define ELF_COMMONPAGESIZE 0x1000
5124 #define elf_backend_can_gc_sections 1
5125 #define elf_backend_can_refcount 1
5126 #define elf_backend_want_got_plt 1
5127 #define elf_backend_plt_readonly 1
5128 #define elf_backend_want_plt_sym 0
5129 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5130 #define elf_backend_rela_normal 1
5131 #define elf_backend_plt_alignment 4
5132 #define elf_backend_extern_protected_data 1
5133 #define elf_backend_caches_rawsize 1
5134 #define elf_backend_dtrel_excludes_plt 1
5135 #define elf_backend_want_dynrelro 1
5137 #define elf_info_to_howto elf_x86_64_info_to_howto
5139 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5140 #define bfd_elf64_bfd_reloc_name_lookup \
5141 elf_x86_64_reloc_name_lookup
5143 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5144 #define elf_backend_check_relocs elf_x86_64_check_relocs
5145 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5146 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5147 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5148 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
5149 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5150 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5152 #define elf_backend_write_core_note elf_x86_64_write_core_note
5154 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5155 #define elf_backend_relocate_section elf_x86_64_relocate_section
5156 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5157 #define elf_backend_object_p elf64_x86_64_elf_object_p
5158 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5160 #define elf_backend_section_from_shdr \
5161 elf_x86_64_section_from_shdr
5163 #define elf_backend_section_from_bfd_section \
5164 elf_x86_64_elf_section_from_bfd_section
5165 #define elf_backend_add_symbol_hook \
5166 elf_x86_64_add_symbol_hook
5167 #define elf_backend_symbol_processing \
5168 elf_x86_64_symbol_processing
5169 #define elf_backend_common_section_index \
5170 elf_x86_64_common_section_index
5171 #define elf_backend_common_section \
5172 elf_x86_64_common_section
5173 #define elf_backend_common_definition \
5174 elf_x86_64_common_definition
5175 #define elf_backend_merge_symbol \
5176 elf_x86_64_merge_symbol
5177 #define elf_backend_special_sections \
5178 elf_x86_64_special_sections
5179 #define elf_backend_additional_program_headers \
5180 elf_x86_64_additional_program_headers
5181 #define elf_backend_setup_gnu_properties \
5182 elf_x86_64_link_setup_gnu_properties
5183 #define elf_backend_hide_symbol \
5184 _bfd_x86_elf_hide_symbol
5187 #define elf64_bed elf64_x86_64_bed
5189 #include "elf64-target.h"
5191 /* CloudABI support. */
5193 #undef TARGET_LITTLE_SYM
5194 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5195 #undef TARGET_LITTLE_NAME
5196 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5199 #define ELF_OSABI ELFOSABI_CLOUDABI
5202 #define elf64_bed elf64_x86_64_cloudabi_bed
5204 #include "elf64-target.h"
5206 /* FreeBSD support. */
5208 #undef TARGET_LITTLE_SYM
5209 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5210 #undef TARGET_LITTLE_NAME
5211 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5214 #define ELF_OSABI ELFOSABI_FREEBSD
5217 #define elf64_bed elf64_x86_64_fbsd_bed
5219 #include "elf64-target.h"
5221 /* Solaris 2 support. */
5223 #undef TARGET_LITTLE_SYM
5224 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5225 #undef TARGET_LITTLE_NAME
5226 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5228 static const struct elf_x86_backend_data elf_x86_64_solaris_arch_bed
=
5233 #undef elf_backend_arch_data
5234 #define elf_backend_arch_data &elf_x86_64_solaris_arch_bed
5236 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5237 objects won't be recognized. */
5241 #define elf64_bed elf64_x86_64_sol2_bed
5243 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5245 #undef elf_backend_static_tls_alignment
5246 #define elf_backend_static_tls_alignment 16
5248 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5250 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5252 #undef elf_backend_want_plt_sym
5253 #define elf_backend_want_plt_sym 1
5255 #undef elf_backend_strtab_flags
5256 #define elf_backend_strtab_flags SHF_STRINGS
5259 elf64_x86_64_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
5260 bfd
*obfd ATTRIBUTE_UNUSED
,
5261 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
5262 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
5264 /* PR 19938: FIXME: Need to add code for setting the sh_info
5265 and sh_link fields of Solaris specific section types. */
5269 #undef elf_backend_copy_special_section_fields
5270 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
5272 #include "elf64-target.h"
5274 /* Native Client support. */
5277 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
5279 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5280 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
5284 #undef TARGET_LITTLE_SYM
5285 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
5286 #undef TARGET_LITTLE_NAME
5287 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5289 #define elf64_bed elf64_x86_64_nacl_bed
5291 #undef ELF_MAXPAGESIZE
5292 #undef ELF_MINPAGESIZE
5293 #undef ELF_COMMONPAGESIZE
5294 #define ELF_MAXPAGESIZE 0x10000
5295 #define ELF_MINPAGESIZE 0x10000
5296 #define ELF_COMMONPAGESIZE 0x10000
5298 /* Restore defaults. */
5300 #undef elf_backend_static_tls_alignment
5301 #undef elf_backend_want_plt_sym
5302 #define elf_backend_want_plt_sym 0
5303 #undef elf_backend_strtab_flags
5304 #undef elf_backend_copy_special_section_fields
5306 /* NaCl uses substantially different PLT entries for the same effects. */
5308 #undef elf_backend_plt_alignment
5309 #define elf_backend_plt_alignment 5
5310 #define NACL_PLT_ENTRY_SIZE 64
5311 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5313 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
5315 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5316 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5317 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5318 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5319 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5321 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5322 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
5324 /* 32 bytes of nop to pad out to the standard size. */
5325 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5326 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5327 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5328 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5329 0x66, /* excess data16 prefix */
5333 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5335 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5336 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5337 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5338 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5340 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5341 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5342 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5344 /* Lazy GOT entries point here (32-byte aligned). */
5345 0x68, /* pushq immediate */
5346 0, 0, 0, 0, /* replaced with index into relocation table. */
5347 0xe9, /* jmp relative */
5348 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5350 /* 22 bytes of nop to pad out to the standard size. */
5351 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5352 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5353 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5356 /* .eh_frame covering the .plt section. */
5358 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
5360 #if (PLT_CIE_LENGTH != 20 \
5361 || PLT_FDE_LENGTH != 36 \
5362 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5363 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5364 # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
5366 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5367 0, 0, 0, 0, /* CIE ID */
5368 1, /* CIE version */
5369 'z', 'R', 0, /* Augmentation string */
5370 1, /* Code alignment factor */
5371 0x78, /* Data alignment factor */
5372 16, /* Return address column */
5373 1, /* Augmentation size */
5374 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5375 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5376 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5377 DW_CFA_nop
, DW_CFA_nop
,
5379 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5380 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
5381 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5382 0, 0, 0, 0, /* .plt size goes here */
5383 0, /* Augmentation size */
5384 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
5385 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5386 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
5387 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5388 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5389 13, /* Block length */
5390 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
5391 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
5392 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5393 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
5394 DW_CFA_nop
, DW_CFA_nop
5397 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
=
5399 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
5400 NACL_PLT_ENTRY_SIZE
, /* plt0_entry_size */
5401 elf_x86_64_nacl_plt_entry
, /* plt_entry */
5402 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5403 elf_x86_64_nacl_plt0_entry
, /* plt_tlsdesc_entry */
5404 NACL_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
5405 2, /* plt_tlsdesc_got1_offset */
5406 9, /* plt_tlsdesc_got2_offset */
5407 6, /* plt_tlsdesc_got1_insn_end */
5408 13, /* plt_tlsdesc_got2_insn_end */
5409 2, /* plt0_got1_offset */
5410 9, /* plt0_got2_offset */
5411 13, /* plt0_got2_insn_end */
5412 3, /* plt_got_offset */
5413 33, /* plt_reloc_offset */
5414 38, /* plt_plt_offset */
5415 7, /* plt_got_insn_size */
5416 42, /* plt_plt_insn_end */
5417 32, /* plt_lazy_offset */
5418 elf_x86_64_nacl_plt0_entry
, /* pic_plt0_entry */
5419 elf_x86_64_nacl_plt_entry
, /* pic_plt_entry */
5420 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
5421 sizeof (elf_x86_64_nacl_eh_frame_plt
) /* eh_frame_plt_size */
5424 static const struct elf_x86_backend_data elf_x86_64_nacl_arch_bed
=
5429 #undef elf_backend_arch_data
5430 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5432 #undef elf_backend_object_p
5433 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5434 #undef elf_backend_modify_segment_map
5435 #define elf_backend_modify_segment_map nacl_modify_segment_map
5436 #undef elf_backend_modify_program_headers
5437 #define elf_backend_modify_program_headers nacl_modify_program_headers
5438 #undef elf_backend_final_write_processing
5439 #define elf_backend_final_write_processing nacl_final_write_processing
5441 #include "elf64-target.h"
5443 /* Native Client x32 support. */
5446 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
5448 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5449 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
5453 #undef TARGET_LITTLE_SYM
5454 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
5455 #undef TARGET_LITTLE_NAME
5456 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5458 #define elf32_bed elf32_x86_64_nacl_bed
5460 #define bfd_elf32_bfd_reloc_type_lookup \
5461 elf_x86_64_reloc_type_lookup
5462 #define bfd_elf32_bfd_reloc_name_lookup \
5463 elf_x86_64_reloc_name_lookup
5464 #define bfd_elf32_get_synthetic_symtab \
5465 elf_x86_64_get_synthetic_symtab
5467 #undef elf_backend_object_p
5468 #define elf_backend_object_p \
5469 elf32_x86_64_nacl_elf_object_p
5471 #undef elf_backend_bfd_from_remote_memory
5472 #define elf_backend_bfd_from_remote_memory \
5473 _bfd_elf32_bfd_from_remote_memory
5475 #undef elf_backend_size_info
5476 #define elf_backend_size_info \
5477 _bfd_elf32_size_info
5480 #define elf32_bed elf32_x86_64_bed
5482 #include "elf32-target.h"
5484 /* Restore defaults. */
5485 #undef elf_backend_object_p
5486 #define elf_backend_object_p elf64_x86_64_elf_object_p
5487 #undef elf_backend_bfd_from_remote_memory
5488 #undef elf_backend_size_info
5489 #undef elf_backend_modify_segment_map
5490 #undef elf_backend_modify_program_headers
5491 #undef elf_backend_final_write_processing
5493 /* Intel L1OM support. */
5496 elf64_l1om_elf_object_p (bfd
*abfd
)
5498 /* Set the right machine number for an L1OM elf64 file. */
5499 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5503 #undef TARGET_LITTLE_SYM
5504 #define TARGET_LITTLE_SYM l1om_elf64_vec
5505 #undef TARGET_LITTLE_NAME
5506 #define TARGET_LITTLE_NAME "elf64-l1om"
5508 #define ELF_ARCH bfd_arch_l1om
5510 #undef ELF_MACHINE_CODE
5511 #define ELF_MACHINE_CODE EM_L1OM
5516 #define elf64_bed elf64_l1om_bed
5518 #undef elf_backend_object_p
5519 #define elf_backend_object_p elf64_l1om_elf_object_p
5521 /* Restore defaults. */
5522 #undef ELF_MAXPAGESIZE
5523 #undef ELF_MINPAGESIZE
5524 #undef ELF_COMMONPAGESIZE
5525 #if DEFAULT_LD_Z_SEPARATE_CODE
5526 # define ELF_MAXPAGESIZE 0x1000
5528 # define ELF_MAXPAGESIZE 0x200000
5530 #define ELF_MINPAGESIZE 0x1000
5531 #define ELF_COMMONPAGESIZE 0x1000
5532 #undef elf_backend_plt_alignment
5533 #define elf_backend_plt_alignment 4
5534 #undef elf_backend_arch_data
5535 #define elf_backend_arch_data &elf_x86_64_arch_bed
5537 #include "elf64-target.h"
5539 /* FreeBSD L1OM support. */
5541 #undef TARGET_LITTLE_SYM
5542 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5543 #undef TARGET_LITTLE_NAME
5544 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5547 #define ELF_OSABI ELFOSABI_FREEBSD
5550 #define elf64_bed elf64_l1om_fbsd_bed
5552 #include "elf64-target.h"
5554 /* Intel K1OM support. */
5557 elf64_k1om_elf_object_p (bfd
*abfd
)
5559 /* Set the right machine number for an K1OM elf64 file. */
5560 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5564 #undef TARGET_LITTLE_SYM
5565 #define TARGET_LITTLE_SYM k1om_elf64_vec
5566 #undef TARGET_LITTLE_NAME
5567 #define TARGET_LITTLE_NAME "elf64-k1om"
5569 #define ELF_ARCH bfd_arch_k1om
5571 #undef ELF_MACHINE_CODE
5572 #define ELF_MACHINE_CODE EM_K1OM
5577 #define elf64_bed elf64_k1om_bed
5579 #undef elf_backend_object_p
5580 #define elf_backend_object_p elf64_k1om_elf_object_p
5582 #undef elf_backend_static_tls_alignment
5584 #undef elf_backend_want_plt_sym
5585 #define elf_backend_want_plt_sym 0
5587 #include "elf64-target.h"
5589 /* FreeBSD K1OM support. */
5591 #undef TARGET_LITTLE_SYM
5592 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
5593 #undef TARGET_LITTLE_NAME
5594 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5597 #define ELF_OSABI ELFOSABI_FREEBSD
5600 #define elf64_bed elf64_k1om_fbsd_bed
5602 #include "elf64-target.h"
5604 /* 32bit x86-64 support. */
5606 #undef TARGET_LITTLE_SYM
5607 #define TARGET_LITTLE_SYM x86_64_elf32_vec
5608 #undef TARGET_LITTLE_NAME
5609 #define TARGET_LITTLE_NAME "elf32-x86-64"
5613 #define ELF_ARCH bfd_arch_i386
5615 #undef ELF_MACHINE_CODE
5616 #define ELF_MACHINE_CODE EM_X86_64
5620 #undef elf_backend_object_p
5621 #define elf_backend_object_p \
5622 elf32_x86_64_elf_object_p
5624 #undef elf_backend_bfd_from_remote_memory
5625 #define elf_backend_bfd_from_remote_memory \
5626 _bfd_elf32_bfd_from_remote_memory
5628 #undef elf_backend_size_info
5629 #define elf_backend_size_info \
5630 _bfd_elf32_size_info
5632 #include "elf32-target.h"