1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2022 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"
24 #include "libiberty.h"
26 #include "opcode/i386.h"
33 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
34 #define MINUS_ONE (~ (bfd_vma) 0)
36 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
37 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
38 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
39 since they are the same. */
41 /* The relocation "howto" table. Order of fields:
42 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
43 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
44 static reloc_howto_type x86_64_elf_howto_table
[] =
46 HOWTO(R_X86_64_NONE
, 0, 3, 0, false, 0, complain_overflow_dont
,
47 bfd_elf_generic_reloc
, "R_X86_64_NONE", false, 0, 0x00000000,
49 HOWTO(R_X86_64_64
, 0, 4, 64, false, 0, complain_overflow_dont
,
50 bfd_elf_generic_reloc
, "R_X86_64_64", false, 0, MINUS_ONE
,
52 HOWTO(R_X86_64_PC32
, 0, 2, 32, true, 0, complain_overflow_signed
,
53 bfd_elf_generic_reloc
, "R_X86_64_PC32", false, 0, 0xffffffff,
55 HOWTO(R_X86_64_GOT32
, 0, 2, 32, false, 0, complain_overflow_signed
,
56 bfd_elf_generic_reloc
, "R_X86_64_GOT32", false, 0, 0xffffffff,
58 HOWTO(R_X86_64_PLT32
, 0, 2, 32, true, 0, complain_overflow_signed
,
59 bfd_elf_generic_reloc
, "R_X86_64_PLT32", false, 0, 0xffffffff,
61 HOWTO(R_X86_64_COPY
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_X86_64_COPY", false, 0, 0xffffffff,
64 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, false, 0, complain_overflow_dont
,
65 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", false, 0, MINUS_ONE
,
67 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, false, 0, complain_overflow_dont
,
68 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", false, 0, MINUS_ONE
,
70 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, false, 0, complain_overflow_dont
,
71 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", false, 0, MINUS_ONE
,
73 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, true, 0, complain_overflow_signed
,
74 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", false, 0, 0xffffffff,
76 HOWTO(R_X86_64_32
, 0, 2, 32, false, 0, complain_overflow_unsigned
,
77 bfd_elf_generic_reloc
, "R_X86_64_32", false, 0, 0xffffffff,
79 HOWTO(R_X86_64_32S
, 0, 2, 32, false, 0, complain_overflow_signed
,
80 bfd_elf_generic_reloc
, "R_X86_64_32S", false, 0, 0xffffffff,
82 HOWTO(R_X86_64_16
, 0, 1, 16, false, 0, complain_overflow_bitfield
,
83 bfd_elf_generic_reloc
, "R_X86_64_16", false, 0, 0xffff, false),
84 HOWTO(R_X86_64_PC16
, 0, 1, 16, true, 0, complain_overflow_bitfield
,
85 bfd_elf_generic_reloc
, "R_X86_64_PC16", false, 0, 0xffff, true),
86 HOWTO(R_X86_64_8
, 0, 0, 8, false, 0, complain_overflow_bitfield
,
87 bfd_elf_generic_reloc
, "R_X86_64_8", false, 0, 0xff, false),
88 HOWTO(R_X86_64_PC8
, 0, 0, 8, true, 0, complain_overflow_signed
,
89 bfd_elf_generic_reloc
, "R_X86_64_PC8", false, 0, 0xff, true),
90 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, false, 0, complain_overflow_dont
,
91 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", false, 0, MINUS_ONE
,
93 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, false, 0, complain_overflow_dont
,
94 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", false, 0, MINUS_ONE
,
96 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, false, 0, complain_overflow_dont
,
97 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", false, 0, MINUS_ONE
,
99 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, true, 0, complain_overflow_signed
,
100 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", false, 0, 0xffffffff,
102 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, true, 0, complain_overflow_signed
,
103 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", false, 0, 0xffffffff,
105 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, false, 0, complain_overflow_signed
,
106 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", false, 0, 0xffffffff,
108 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, true, 0, complain_overflow_signed
,
109 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", false, 0, 0xffffffff,
111 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, false, 0, complain_overflow_signed
,
112 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", false, 0, 0xffffffff,
114 HOWTO(R_X86_64_PC64
, 0, 4, 64, true, 0, complain_overflow_dont
,
115 bfd_elf_generic_reloc
, "R_X86_64_PC64", false, 0, MINUS_ONE
,
117 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, false, 0, complain_overflow_dont
,
118 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64", false, 0, MINUS_ONE
,
120 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, true, 0, complain_overflow_signed
,
121 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32", false, 0, 0xffffffff,
123 HOWTO(R_X86_64_GOT64
, 0, 4, 64, false, 0, complain_overflow_signed
,
124 bfd_elf_generic_reloc
, "R_X86_64_GOT64", false, 0, MINUS_ONE
,
126 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, true, 0, complain_overflow_signed
,
127 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", false, 0, MINUS_ONE
,
129 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, true, 0, complain_overflow_signed
,
130 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64", false, 0, MINUS_ONE
,
132 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, false, 0, complain_overflow_signed
,
133 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", false, 0, MINUS_ONE
,
135 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, false, 0, complain_overflow_signed
,
136 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", false, 0, MINUS_ONE
,
138 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, false, 0, complain_overflow_unsigned
,
139 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", false, 0, 0xffffffff,
141 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, false, 0, complain_overflow_dont
,
142 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", false, 0, MINUS_ONE
,
144 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, true, 0,
145 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
146 "R_X86_64_GOTPC32_TLSDESC", false, 0, 0xffffffff, true),
147 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 3, 0, false, 0,
148 complain_overflow_dont
, bfd_elf_generic_reloc
,
149 "R_X86_64_TLSDESC_CALL",
151 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, false, 0,
152 complain_overflow_dont
, bfd_elf_generic_reloc
,
153 "R_X86_64_TLSDESC", false, 0, MINUS_ONE
, false),
154 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, false, 0, complain_overflow_dont
,
155 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", false, 0, MINUS_ONE
,
157 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, false, 0, complain_overflow_dont
,
158 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", false, 0, MINUS_ONE
,
160 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, true, 0, complain_overflow_signed
,
161 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", false, 0, 0xffffffff,
163 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, true, 0, complain_overflow_signed
,
164 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", false, 0, 0xffffffff,
166 HOWTO(R_X86_64_GOTPCRELX
, 0, 2, 32, true, 0, complain_overflow_signed
,
167 bfd_elf_generic_reloc
, "R_X86_64_GOTPCRELX", false, 0, 0xffffffff,
169 HOWTO(R_X86_64_REX_GOTPCRELX
, 0, 2, 32, true, 0, complain_overflow_signed
,
170 bfd_elf_generic_reloc
, "R_X86_64_REX_GOTPCRELX", false, 0, 0xffffffff,
173 /* We have a gap in the reloc numbers here.
174 R_X86_64_standard counts the number up to this point, and
175 R_X86_64_vt_offset is the value to subtract from a reloc type of
176 R_X86_64_GNU_VT* to form an index into this table. */
177 #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
178 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
180 /* GNU extension to record C++ vtable hierarchy. */
181 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, false, 0, complain_overflow_dont
,
182 NULL
, "R_X86_64_GNU_VTINHERIT", false, 0, 0, false),
184 /* GNU extension to record C++ vtable member usage. */
185 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, false, 0, complain_overflow_dont
,
186 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", false, 0, 0,
189 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
190 HOWTO(R_X86_64_32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
191 bfd_elf_generic_reloc
, "R_X86_64_32", false, 0, 0xffffffff,
195 /* Map BFD relocs to the x86_64 elf relocs. */
198 bfd_reloc_code_real_type bfd_reloc_val
;
199 unsigned char elf_reloc_val
;
202 static const struct elf_reloc_map x86_64_reloc_map
[] =
204 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
205 { BFD_RELOC_64
, R_X86_64_64
, },
206 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
207 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
208 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
209 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
210 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
211 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
212 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
213 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
214 { BFD_RELOC_32
, R_X86_64_32
, },
215 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
216 { BFD_RELOC_16
, R_X86_64_16
, },
217 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
218 { BFD_RELOC_8
, R_X86_64_8
, },
219 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
220 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
221 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
222 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
223 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
224 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
225 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
226 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
227 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
228 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
229 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
230 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
231 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
232 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
233 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
234 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
235 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
236 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
237 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
238 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
239 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
240 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
241 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
242 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
, },
243 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
, },
244 { BFD_RELOC_X86_64_GOTPCRELX
, R_X86_64_GOTPCRELX
, },
245 { BFD_RELOC_X86_64_REX_GOTPCRELX
, R_X86_64_REX_GOTPCRELX
, },
246 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
247 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
250 static reloc_howto_type
*
251 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
255 if (r_type
== (unsigned int) R_X86_64_32
)
260 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
262 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
263 || r_type
>= (unsigned int) R_X86_64_max
)
265 if (r_type
>= (unsigned int) R_X86_64_standard
)
267 /* xgettext:c-format */
268 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
270 bfd_set_error (bfd_error_bad_value
);
276 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
277 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
278 return &x86_64_elf_howto_table
[i
];
281 /* Given a BFD reloc type, return a HOWTO structure. */
282 static reloc_howto_type
*
283 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
284 bfd_reloc_code_real_type code
)
288 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
291 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
292 return elf_x86_64_rtype_to_howto (abfd
,
293 x86_64_reloc_map
[i
].elf_reloc_val
);
298 static reloc_howto_type
*
299 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
304 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
306 /* Get x32 R_X86_64_32. */
307 reloc_howto_type
*reloc
308 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
309 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
313 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
314 if (x86_64_elf_howto_table
[i
].name
!= NULL
315 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
316 return &x86_64_elf_howto_table
[i
];
321 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
324 elf_x86_64_info_to_howto (bfd
*abfd
, arelent
*cache_ptr
,
325 Elf_Internal_Rela
*dst
)
329 r_type
= ELF32_R_TYPE (dst
->r_info
);
330 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
331 if (cache_ptr
->howto
== NULL
)
333 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
|| cache_ptr
->howto
->type
== R_X86_64_NONE
);
337 /* Support for core dump NOTE sections. */
339 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
344 switch (note
->descsz
)
349 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
351 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
354 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
362 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
364 elf_tdata (abfd
)->core
->signal
365 = bfd_get_16 (abfd
, note
->descdata
+ 12);
368 elf_tdata (abfd
)->core
->lwpid
369 = bfd_get_32 (abfd
, note
->descdata
+ 32);
378 /* Make a ".reg/999" section. */
379 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
380 size
, note
->descpos
+ offset
);
384 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
386 switch (note
->descsz
)
391 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
392 elf_tdata (abfd
)->core
->pid
393 = bfd_get_32 (abfd
, note
->descdata
+ 12);
394 elf_tdata (abfd
)->core
->program
395 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
396 elf_tdata (abfd
)->core
->command
397 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
400 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
401 elf_tdata (abfd
)->core
->pid
402 = bfd_get_32 (abfd
, note
->descdata
+ 24);
403 elf_tdata (abfd
)->core
->program
404 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
405 elf_tdata (abfd
)->core
->command
406 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
409 /* Note that for some reason, a spurious space is tacked
410 onto the end of the args in some (at least one anyway)
411 implementations, so strip it off if it exists. */
414 char *command
= elf_tdata (abfd
)->core
->command
;
415 int n
= strlen (command
);
417 if (0 < n
&& command
[n
- 1] == ' ')
418 command
[n
- 1] = '\0';
425 # if GCC_VERSION >= 8000
426 # pragma GCC diagnostic push
427 # pragma GCC diagnostic ignored "-Wstringop-truncation"
430 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
433 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
435 const char *fname
, *psargs
;
446 va_start (ap
, note_type
);
447 fname
= va_arg (ap
, const char *);
448 psargs
= va_arg (ap
, const char *);
451 if (bed
->s
->elfclass
== ELFCLASS32
)
454 memset (&data
, 0, sizeof (data
));
455 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
456 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
457 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
458 &data
, sizeof (data
));
463 memset (&data
, 0, sizeof (data
));
464 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
465 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
466 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
467 &data
, sizeof (data
));
472 va_start (ap
, note_type
);
473 pid
= va_arg (ap
, long);
474 cursig
= va_arg (ap
, int);
475 gregs
= va_arg (ap
, const void *);
478 if (bed
->s
->elfclass
== ELFCLASS32
)
480 if (bed
->elf_machine_code
== EM_X86_64
)
482 prstatusx32_t prstat
;
483 memset (&prstat
, 0, sizeof (prstat
));
485 prstat
.pr_cursig
= cursig
;
486 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
487 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
488 &prstat
, sizeof (prstat
));
493 memset (&prstat
, 0, sizeof (prstat
));
495 prstat
.pr_cursig
= cursig
;
496 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
497 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
498 &prstat
, sizeof (prstat
));
504 memset (&prstat
, 0, sizeof (prstat
));
506 prstat
.pr_cursig
= cursig
;
507 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
508 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
509 &prstat
, sizeof (prstat
));
514 # if GCC_VERSION >= 8000
515 # pragma GCC diagnostic pop
519 /* Functions for the x86-64 ELF linker. */
521 /* The size in bytes of an entry in the global offset table. */
523 #define GOT_ENTRY_SIZE 8
525 /* The size in bytes of an entry in the lazy procedure linkage table. */
527 #define LAZY_PLT_ENTRY_SIZE 16
529 /* The size in bytes of an entry in the non-lazy procedure linkage
532 #define NON_LAZY_PLT_ENTRY_SIZE 8
534 /* The first entry in a lazy procedure linkage table looks like this.
535 See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this
538 static const bfd_byte elf_x86_64_lazy_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
540 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
541 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
542 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
545 /* Subsequent entries in a lazy procedure linkage table look like this. */
547 static const bfd_byte elf_x86_64_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
549 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
550 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
551 0x68, /* pushq immediate */
552 0, 0, 0, 0, /* replaced with index into relocation table. */
553 0xe9, /* jmp relative */
554 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
557 /* The first entry in a lazy procedure linkage table with BND prefix
560 static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
562 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
563 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
564 0x0f, 0x1f, 0 /* nopl (%rax) */
567 /* Subsequent entries for branches with BND prefx in a lazy procedure
568 linkage table look like this. */
570 static const bfd_byte elf_x86_64_lazy_bnd_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
572 0x68, 0, 0, 0, 0, /* pushq immediate */
573 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
574 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
577 /* The first entry in the IBT-enabled lazy procedure linkage table is the
578 the same as the lazy PLT with BND prefix so that bound registers are
579 preserved when control is passed to dynamic linker. Subsequent
580 entries for a IBT-enabled lazy procedure linkage table look like
583 static const bfd_byte elf_x86_64_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
585 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
586 0x68, 0, 0, 0, 0, /* pushq immediate */
587 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
591 /* The first entry in the x32 IBT-enabled lazy procedure linkage table
592 is the same as the normal lazy PLT. Subsequent entries for an
593 x32 IBT-enabled lazy procedure linkage table look like this. */
595 static const bfd_byte elf_x32_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
597 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
598 0x68, 0, 0, 0, 0, /* pushq immediate */
599 0xe9, 0, 0, 0, 0, /* jmpq relative */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries in the non-lazey procedure linkage table look like this. */
605 static const bfd_byte elf_x86_64_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
607 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
608 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
612 /* Entries for branches with BND prefix in the non-lazey procedure
613 linkage table look like this. */
615 static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
617 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
618 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
622 /* Entries for branches with IBT-enabled in the non-lazey procedure
623 linkage table look like this. They have the same size as the lazy
626 static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
628 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
629 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
630 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
631 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */
634 /* Entries for branches with IBT-enabled in the x32 non-lazey procedure
635 linkage table look like this. They have the same size as the lazy
638 static const bfd_byte elf_x32_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
640 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
641 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
642 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
643 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
646 /* The TLSDESC entry in a lazy procedure linkage table. */
647 static const bfd_byte elf_x86_64_tlsdesc_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
649 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
650 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
651 0xff, 0x25, 16, 0, 0, 0 /* jmpq *GOT+TDG(%rip) */
654 /* .eh_frame covering the lazy .plt section. */
656 static const bfd_byte elf_x86_64_eh_frame_lazy_plt
[] =
658 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
659 0, 0, 0, 0, /* CIE ID */
661 'z', 'R', 0, /* Augmentation string */
662 1, /* Code alignment factor */
663 0x78, /* Data alignment factor */
664 16, /* Return address column */
665 1, /* Augmentation size */
666 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
667 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
668 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
669 DW_CFA_nop
, DW_CFA_nop
,
671 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
672 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
673 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
674 0, 0, 0, 0, /* .plt size goes here */
675 0, /* Augmentation size */
676 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
677 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
678 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
679 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
680 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
681 11, /* Block length */
682 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
683 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
684 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
685 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
686 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
689 /* .eh_frame covering the lazy BND .plt section. */
691 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt
[] =
693 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
694 0, 0, 0, 0, /* CIE ID */
696 'z', 'R', 0, /* Augmentation string */
697 1, /* Code alignment factor */
698 0x78, /* Data alignment factor */
699 16, /* Return address column */
700 1, /* Augmentation size */
701 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
702 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
703 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
704 DW_CFA_nop
, DW_CFA_nop
,
706 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
707 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
708 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
709 0, 0, 0, 0, /* .plt size goes here */
710 0, /* Augmentation size */
711 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
712 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
713 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
714 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
715 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
716 11, /* Block length */
717 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
718 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
719 DW_OP_lit15
, DW_OP_and
, DW_OP_lit5
, DW_OP_ge
,
720 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
721 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
724 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
726 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt
[] =
728 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
729 0, 0, 0, 0, /* CIE ID */
731 'z', 'R', 0, /* Augmentation string */
732 1, /* Code alignment factor */
733 0x78, /* Data alignment factor */
734 16, /* Return address column */
735 1, /* Augmentation size */
736 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
737 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
738 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
739 DW_CFA_nop
, DW_CFA_nop
,
741 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
742 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
743 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
744 0, 0, 0, 0, /* .plt size goes here */
745 0, /* Augmentation size */
746 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
747 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
748 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
749 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
750 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
751 11, /* Block length */
752 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
753 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
754 DW_OP_lit15
, DW_OP_and
, DW_OP_lit10
, DW_OP_ge
,
755 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
756 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
759 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
761 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt
[] =
763 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
764 0, 0, 0, 0, /* CIE ID */
766 'z', 'R', 0, /* Augmentation string */
767 1, /* Code alignment factor */
768 0x78, /* Data alignment factor */
769 16, /* Return address column */
770 1, /* Augmentation size */
771 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
772 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
773 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
774 DW_CFA_nop
, DW_CFA_nop
,
776 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
777 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
778 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
779 0, 0, 0, 0, /* .plt size goes here */
780 0, /* Augmentation size */
781 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
782 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
783 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
784 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
785 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
786 11, /* Block length */
787 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
788 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
789 DW_OP_lit15
, DW_OP_and
, DW_OP_lit9
, DW_OP_ge
,
790 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
791 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
794 /* .eh_frame covering the non-lazy .plt section. */
796 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt
[] =
798 #define PLT_GOT_FDE_LENGTH 20
799 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
800 0, 0, 0, 0, /* CIE ID */
802 'z', 'R', 0, /* Augmentation string */
803 1, /* Code alignment factor */
804 0x78, /* Data alignment factor */
805 16, /* Return address column */
806 1, /* Augmentation size */
807 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
808 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
809 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
810 DW_CFA_nop
, DW_CFA_nop
,
812 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
813 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
814 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
815 0, 0, 0, 0, /* non-lazy .plt size goes here */
816 0, /* Augmentation size */
817 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
,
818 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
821 /* These are the standard parameters. */
822 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt
=
824 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
825 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
826 elf_x86_64_lazy_plt_entry
, /* plt_entry */
827 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
828 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
829 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
830 6, /* plt_tlsdesc_got1_offset */
831 12, /* plt_tlsdesc_got2_offset */
832 10, /* plt_tlsdesc_got1_insn_end */
833 16, /* plt_tlsdesc_got2_insn_end */
834 2, /* plt0_got1_offset */
835 8, /* plt0_got2_offset */
836 12, /* plt0_got2_insn_end */
837 2, /* plt_got_offset */
838 7, /* plt_reloc_offset */
839 12, /* plt_plt_offset */
840 6, /* plt_got_insn_size */
841 LAZY_PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
842 6, /* plt_lazy_offset */
843 elf_x86_64_lazy_plt0_entry
, /* pic_plt0_entry */
844 elf_x86_64_lazy_plt_entry
, /* pic_plt_entry */
845 elf_x86_64_eh_frame_lazy_plt
, /* eh_frame_plt */
846 sizeof (elf_x86_64_eh_frame_lazy_plt
) /* eh_frame_plt_size */
849 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt
=
851 elf_x86_64_non_lazy_plt_entry
, /* plt_entry */
852 elf_x86_64_non_lazy_plt_entry
, /* pic_plt_entry */
853 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
854 2, /* plt_got_offset */
855 6, /* plt_got_insn_size */
856 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
857 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
860 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt
=
862 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
863 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
864 elf_x86_64_lazy_bnd_plt_entry
, /* plt_entry */
865 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
866 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
867 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
868 6, /* plt_tlsdesc_got1_offset */
869 12, /* plt_tlsdesc_got2_offset */
870 10, /* plt_tlsdesc_got1_insn_end */
871 16, /* plt_tlsdesc_got2_insn_end */
872 2, /* plt0_got1_offset */
873 1+8, /* plt0_got2_offset */
874 1+12, /* plt0_got2_insn_end */
875 1+2, /* plt_got_offset */
876 1, /* plt_reloc_offset */
877 7, /* plt_plt_offset */
878 1+6, /* plt_got_insn_size */
879 11, /* plt_plt_insn_end */
880 0, /* plt_lazy_offset */
881 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
882 elf_x86_64_lazy_bnd_plt_entry
, /* pic_plt_entry */
883 elf_x86_64_eh_frame_lazy_bnd_plt
, /* eh_frame_plt */
884 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt
) /* eh_frame_plt_size */
887 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt
=
889 elf_x86_64_non_lazy_bnd_plt_entry
, /* plt_entry */
890 elf_x86_64_non_lazy_bnd_plt_entry
, /* pic_plt_entry */
891 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
892 1+2, /* plt_got_offset */
893 1+6, /* plt_got_insn_size */
894 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
895 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
898 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt
=
900 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
901 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
902 elf_x86_64_lazy_ibt_plt_entry
, /* plt_entry */
903 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
904 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
905 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
906 6, /* plt_tlsdesc_got1_offset */
907 12, /* plt_tlsdesc_got2_offset */
908 10, /* plt_tlsdesc_got1_insn_end */
909 16, /* plt_tlsdesc_got2_insn_end */
910 2, /* plt0_got1_offset */
911 1+8, /* plt0_got2_offset */
912 1+12, /* plt0_got2_insn_end */
913 4+1+2, /* plt_got_offset */
914 4+1, /* plt_reloc_offset */
915 4+1+6, /* plt_plt_offset */
916 4+1+6, /* plt_got_insn_size */
917 4+1+5+5, /* plt_plt_insn_end */
918 0, /* plt_lazy_offset */
919 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
920 elf_x86_64_lazy_ibt_plt_entry
, /* pic_plt_entry */
921 elf_x86_64_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
922 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
925 static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt
=
927 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
928 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
929 elf_x32_lazy_ibt_plt_entry
, /* plt_entry */
930 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
931 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
932 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
933 6, /* plt_tlsdesc_got1_offset */
934 12, /* plt_tlsdesc_got2_offset */
935 10, /* plt_tlsdesc_got1_insn_end */
936 16, /* plt_tlsdesc_got2_insn_end */
937 2, /* plt0_got1_offset */
938 8, /* plt0_got2_offset */
939 12, /* plt0_got2_insn_end */
940 4+2, /* plt_got_offset */
941 4+1, /* plt_reloc_offset */
942 4+6, /* plt_plt_offset */
943 4+6, /* plt_got_insn_size */
944 4+5+5, /* plt_plt_insn_end */
945 0, /* plt_lazy_offset */
946 elf_x86_64_lazy_plt0_entry
, /* pic_plt0_entry */
947 elf_x32_lazy_ibt_plt_entry
, /* pic_plt_entry */
948 elf_x32_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
949 sizeof (elf_x32_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
952 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt
=
954 elf_x86_64_non_lazy_ibt_plt_entry
, /* plt_entry */
955 elf_x86_64_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
956 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
957 4+1+2, /* plt_got_offset */
958 4+1+6, /* plt_got_insn_size */
959 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
960 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
963 static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt
=
965 elf_x32_non_lazy_ibt_plt_entry
, /* plt_entry */
966 elf_x32_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
967 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
968 4+2, /* plt_got_offset */
969 4+6, /* plt_got_insn_size */
970 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
971 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
976 elf64_x86_64_elf_object_p (bfd
*abfd
)
978 /* Set the right machine number for an x86-64 elf64 file. */
979 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
984 elf32_x86_64_elf_object_p (bfd
*abfd
)
986 /* Set the right machine number for an x86-64 elf32 file. */
987 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
991 /* Return TRUE if the TLS access code sequence support transition
995 elf_x86_64_check_tls_transition (bfd
*abfd
,
996 struct bfd_link_info
*info
,
999 Elf_Internal_Shdr
*symtab_hdr
,
1000 struct elf_link_hash_entry
**sym_hashes
,
1001 unsigned int r_type
,
1002 const Elf_Internal_Rela
*rel
,
1003 const Elf_Internal_Rela
*relend
)
1006 unsigned long r_symndx
;
1007 bool largepic
= false;
1008 struct elf_link_hash_entry
*h
;
1010 struct elf_x86_link_hash_table
*htab
;
1014 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1015 offset
= rel
->r_offset
;
1018 case R_X86_64_TLSGD
:
1019 case R_X86_64_TLSLD
:
1020 if ((rel
+ 1) >= relend
)
1023 if (r_type
== R_X86_64_TLSGD
)
1025 /* Check transition from GD access model. For 64bit, only
1026 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1027 .word 0x6666; rex64; call __tls_get_addr@PLT
1029 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1031 call *__tls_get_addr@GOTPCREL(%rip)
1032 which may be converted to
1033 addr32 call __tls_get_addr
1034 can transit to different access model. For 32bit, only
1035 leaq foo@tlsgd(%rip), %rdi
1036 .word 0x6666; rex64; call __tls_get_addr@PLT
1038 leaq foo@tlsgd(%rip), %rdi
1040 call *__tls_get_addr@GOTPCREL(%rip)
1041 which may be converted to
1042 addr32 call __tls_get_addr
1043 can transit to different access model. For largepic,
1045 leaq foo@tlsgd(%rip), %rdi
1046 movabsq $__tls_get_addr@pltoff, %rax
1050 leaq foo@tlsgd(%rip), %rdi
1051 movabsq $__tls_get_addr@pltoff, %rax
1055 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1057 if ((offset
+ 12) > sec
->size
)
1060 call
= contents
+ offset
+ 4;
1062 || !((call
[1] == 0x48
1070 && call
[3] == 0xe8)))
1072 if (!ABI_64_P (abfd
)
1073 || (offset
+ 19) > sec
->size
1075 || memcmp (call
- 7, leaq
+ 1, 3) != 0
1076 || memcmp (call
, "\x48\xb8", 2) != 0
1080 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1081 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1085 else if (ABI_64_P (abfd
))
1088 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1094 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1097 indirect_call
= call
[2] == 0xff;
1101 /* Check transition from LD access model. Only
1102 leaq foo@tlsld(%rip), %rdi;
1103 call __tls_get_addr@PLT
1105 leaq foo@tlsld(%rip), %rdi;
1106 call *__tls_get_addr@GOTPCREL(%rip)
1107 which may be converted to
1108 addr32 call __tls_get_addr
1109 can transit to different access model. For largepic
1111 leaq foo@tlsld(%rip), %rdi
1112 movabsq $__tls_get_addr@pltoff, %rax
1116 leaq foo@tlsld(%rip), %rdi
1117 movabsq $__tls_get_addr@pltoff, %rax
1121 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1123 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1126 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1129 call
= contents
+ offset
+ 4;
1130 if (!(call
[0] == 0xe8
1131 || (call
[0] == 0xff && call
[1] == 0x15)
1132 || (call
[0] == 0x67 && call
[1] == 0xe8)))
1134 if (!ABI_64_P (abfd
)
1135 || (offset
+ 19) > sec
->size
1136 || memcmp (call
, "\x48\xb8", 2) != 0
1140 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1141 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1145 indirect_call
= call
[0] == 0xff;
1148 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1149 if (r_symndx
< symtab_hdr
->sh_info
)
1152 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1154 || !((struct elf_x86_link_hash_entry
*) h
)->tls_get_addr
)
1158 r_type
= (ELF32_R_TYPE (rel
[1].r_info
)
1159 & ~R_X86_64_converted_reloc_bit
);
1161 return r_type
== R_X86_64_PLTOFF64
;
1162 else if (indirect_call
)
1163 return r_type
== R_X86_64_GOTPCRELX
;
1165 return (r_type
== R_X86_64_PC32
|| r_type
== R_X86_64_PLT32
);
1168 case R_X86_64_GOTTPOFF
:
1169 /* Check transition from IE access model:
1170 mov foo@gottpoff(%rip), %reg
1171 add foo@gottpoff(%rip), %reg
1174 /* Check REX prefix first. */
1175 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1177 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1178 if (val
!= 0x48 && val
!= 0x4c)
1180 /* X32 may have 0x44 REX prefix or no REX prefix. */
1181 if (ABI_64_P (abfd
))
1187 /* X32 may not have any REX prefix. */
1188 if (ABI_64_P (abfd
))
1190 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1194 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1195 if (val
!= 0x8b && val
!= 0x03)
1198 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1199 return (val
& 0xc7) == 5;
1201 case R_X86_64_GOTPC32_TLSDESC
:
1202 /* Check transition from GDesc access model:
1203 leaq x@tlsdesc(%rip), %rax <--- LP64 mode.
1204 rex leal x@tlsdesc(%rip), %eax <--- X32 mode.
1206 Make sure it's a leaq adding rip to a 32-bit offset
1207 into any register, although it's probably almost always
1210 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1213 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1215 if (val
!= 0x48 && (ABI_64_P (abfd
) || val
!= 0x40))
1218 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1221 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1222 return (val
& 0xc7) == 0x05;
1224 case R_X86_64_TLSDESC_CALL
:
1225 /* Check transition from GDesc access model:
1226 call *x@tlsdesc(%rax) <--- LP64 mode.
1227 call *x@tlsdesc(%eax) <--- X32 mode.
1229 if (offset
+ 2 <= sec
->size
)
1231 unsigned int prefix
;
1232 call
= contents
+ offset
;
1234 if (!ABI_64_P (abfd
))
1236 /* Check for call *x@tlsdesc(%eax). */
1237 if (call
[0] == 0x67)
1240 if (offset
+ 3 > sec
->size
)
1244 /* Make sure that it's a call *x@tlsdesc(%rax). */
1245 return call
[prefix
] == 0xff && call
[1 + prefix
] == 0x10;
1255 /* Return TRUE if the TLS access transition is OK or no transition
1256 will be performed. Update R_TYPE if there is a transition. */
1259 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1260 asection
*sec
, bfd_byte
*contents
,
1261 Elf_Internal_Shdr
*symtab_hdr
,
1262 struct elf_link_hash_entry
**sym_hashes
,
1263 unsigned int *r_type
, int tls_type
,
1264 const Elf_Internal_Rela
*rel
,
1265 const Elf_Internal_Rela
*relend
,
1266 struct elf_link_hash_entry
*h
,
1267 unsigned long r_symndx
,
1268 bool from_relocate_section
)
1270 unsigned int from_type
= *r_type
;
1271 unsigned int to_type
= from_type
;
1274 /* Skip TLS transition for functions. */
1276 && (h
->type
== STT_FUNC
1277 || h
->type
== STT_GNU_IFUNC
))
1282 case R_X86_64_TLSGD
:
1283 case R_X86_64_GOTPC32_TLSDESC
:
1284 case R_X86_64_TLSDESC_CALL
:
1285 case R_X86_64_GOTTPOFF
:
1286 if (bfd_link_executable (info
))
1289 to_type
= R_X86_64_TPOFF32
;
1291 to_type
= R_X86_64_GOTTPOFF
;
1294 /* When we are called from elf_x86_64_relocate_section, there may
1295 be additional transitions based on TLS_TYPE. */
1296 if (from_relocate_section
)
1298 unsigned int new_to_type
= to_type
;
1300 if (TLS_TRANSITION_IE_TO_LE_P (info
, h
, tls_type
))
1301 new_to_type
= R_X86_64_TPOFF32
;
1303 if (to_type
== R_X86_64_TLSGD
1304 || to_type
== R_X86_64_GOTPC32_TLSDESC
1305 || to_type
== R_X86_64_TLSDESC_CALL
)
1307 if (tls_type
== GOT_TLS_IE
)
1308 new_to_type
= R_X86_64_GOTTPOFF
;
1311 /* We checked the transition before when we were called from
1312 elf_x86_64_scan_relocs. We only want to check the new
1313 transition which hasn't been checked before. */
1314 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1315 to_type
= new_to_type
;
1320 case R_X86_64_TLSLD
:
1321 if (bfd_link_executable (info
))
1322 to_type
= R_X86_64_TPOFF32
;
1329 /* Return TRUE if there is no transition. */
1330 if (from_type
== to_type
)
1333 /* Check if the transition can be performed. */
1335 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1336 symtab_hdr
, sym_hashes
,
1337 from_type
, rel
, relend
))
1339 reloc_howto_type
*from
, *to
;
1342 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1343 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1345 if (from
== NULL
|| to
== NULL
)
1349 name
= h
->root
.root
.string
;
1352 struct elf_x86_link_hash_table
*htab
;
1354 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1359 Elf_Internal_Sym
*isym
;
1361 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
1363 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1368 /* xgettext:c-format */
1369 (_("%pB: TLS transition from %s to %s against `%s' at %#" PRIx64
1370 " in section `%pA' failed"),
1371 abfd
, from
->name
, to
->name
, name
, (uint64_t) rel
->r_offset
, sec
);
1372 bfd_set_error (bfd_error_bad_value
);
1381 elf_x86_64_need_pic (struct bfd_link_info
*info
,
1382 bfd
*input_bfd
, asection
*sec
,
1383 struct elf_link_hash_entry
*h
,
1384 Elf_Internal_Shdr
*symtab_hdr
,
1385 Elf_Internal_Sym
*isym
,
1386 reloc_howto_type
*howto
)
1389 const char *und
= "";
1390 const char *pic
= "";
1396 name
= h
->root
.root
.string
;
1397 switch (ELF_ST_VISIBILITY (h
->other
))
1400 v
= _("hidden symbol ");
1403 v
= _("internal symbol ");
1406 v
= _("protected symbol ");
1409 if (((struct elf_x86_link_hash_entry
*) h
)->def_protected
)
1410 v
= _("protected symbol ");
1417 if (!SYMBOL_DEFINED_NON_SHARED_P (h
) && !h
->def_dynamic
)
1418 und
= _("undefined ");
1422 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, isym
, NULL
);
1426 if (bfd_link_dll (info
))
1428 object
= _("a shared object");
1430 pic
= _("; recompile with -fPIC");
1434 if (bfd_link_pie (info
))
1435 object
= _("a PIE object");
1437 object
= _("a PDE object");
1439 pic
= _("; recompile with -fPIE");
1442 /* xgettext:c-format */
1443 _bfd_error_handler (_("%pB: relocation %s against %s%s`%s' can "
1444 "not be used when making %s%s"),
1445 input_bfd
, howto
->name
, und
, v
, name
,
1447 bfd_set_error (bfd_error_bad_value
);
1448 sec
->check_relocs_failed
= 1;
1452 /* With the local symbol, foo, we convert
1453 mov foo@GOTPCREL(%rip), %reg
1457 call/jmp *foo@GOTPCREL(%rip)
1459 nop call foo/jmp foo nop
1460 When PIC is false, convert
1461 test %reg, foo@GOTPCREL(%rip)
1465 binop foo@GOTPCREL(%rip), %reg
1468 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1472 elf_x86_64_convert_load_reloc (bfd
*abfd
,
1474 unsigned int *r_type_p
,
1475 Elf_Internal_Rela
*irel
,
1476 struct elf_link_hash_entry
*h
,
1478 struct bfd_link_info
*link_info
)
1480 struct elf_x86_link_hash_table
*htab
;
1488 bfd_signed_vma raddend
;
1489 unsigned int opcode
;
1491 unsigned int r_type
= *r_type_p
;
1492 unsigned int r_symndx
;
1493 bfd_vma roff
= irel
->r_offset
;
1494 bfd_vma abs_relocation
;
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
1541 /* Get the symbol referred to by the reloc. */
1544 Elf_Internal_Sym
*isym
1545 = bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
, abfd
, r_symndx
);
1547 /* Skip relocation against undefined symbols. */
1548 if (isym
->st_shndx
== SHN_UNDEF
)
1552 if (isym
->st_shndx
== SHN_ABS
)
1554 tsec
= bfd_abs_section_ptr
;
1556 abs_relocation
= isym
->st_value
;
1558 else if (isym
->st_shndx
== SHN_COMMON
)
1559 tsec
= bfd_com_section_ptr
;
1560 else if (isym
->st_shndx
== SHN_X86_64_LCOMMON
)
1561 tsec
= &_bfd_elf_large_com_section
;
1563 tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1567 /* Undefined weak symbol is only bound locally in executable
1568 and its reference is resolved as 0 without relocation
1569 overflow. We can only perform this optimization for
1570 GOTPCRELX relocations since we need to modify REX byte.
1571 It is OK convert mov with R_X86_64_GOTPCREL to
1573 struct elf_x86_link_hash_entry
*eh
= elf_x86_hash_entry (h
);
1575 abs_symbol
= ABS_SYMBOL_P (h
);
1576 abs_relocation
= h
->root
.u
.def
.value
;
1578 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1579 local_ref
= SYMBOL_REFERENCES_LOCAL_P (link_info
, h
);
1580 if ((relocx
|| opcode
== 0x8b)
1581 && (h
->root
.type
== bfd_link_hash_undefweak
1587 /* Skip for branch instructions since R_X86_64_PC32
1594 /* For non-branch instructions, we can convert to
1595 R_X86_64_32/R_X86_64_32S since we know if there
1597 to_reloc_pc32
= false;
1600 /* Since we don't know the current PC when PIC is true,
1601 we can't convert to R_X86_64_PC32. */
1602 if (to_reloc_pc32
&& is_pic
)
1607 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
1608 ld.so may use its link-time address. */
1609 else if (h
->start_stop
1612 || h
->root
.type
== bfd_link_hash_defined
1613 || h
->root
.type
== bfd_link_hash_defweak
)
1614 && h
!= htab
->elf
.hdynamic
1617 /* bfd_link_hash_new or bfd_link_hash_undefined is
1618 set by an assignment in a linker script in
1619 bfd_elf_record_link_assignment. start_stop is set
1620 on __start_SECNAME/__stop_SECNAME which mark section
1625 && (h
->root
.type
== bfd_link_hash_new
1626 || h
->root
.type
== bfd_link_hash_undefined
1627 || ((h
->root
.type
== bfd_link_hash_defined
1628 || h
->root
.type
== bfd_link_hash_defweak
)
1629 && h
->root
.u
.def
.section
== bfd_und_section_ptr
))))
1631 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
1636 tsec
= h
->root
.u
.def
.section
;
1642 /* Don't convert GOTPCREL relocation against large section. */
1643 if (elf_section_data (tsec
) != NULL
1644 && (elf_section_flags (tsec
) & SHF_X86_64_LARGE
) != 0)
1647 /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */
1654 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
1659 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
1661 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1664 /* Convert to "jmp foo nop". */
1667 nop_offset
= irel
->r_offset
+ 3;
1668 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1669 irel
->r_offset
-= 1;
1670 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1674 struct elf_x86_link_hash_entry
*eh
1675 = (struct elf_x86_link_hash_entry
*) h
;
1677 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1680 /* To support TLS optimization, always use addr32 prefix for
1681 "call *__tls_get_addr@GOTPCREL(%rip)". */
1682 if (eh
&& eh
->tls_get_addr
)
1685 nop_offset
= irel
->r_offset
- 2;
1689 nop
= htab
->params
->call_nop_byte
;
1690 if (htab
->params
->call_nop_as_suffix
)
1692 nop_offset
= irel
->r_offset
+ 3;
1693 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1694 irel
->r_offset
-= 1;
1695 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1698 nop_offset
= irel
->r_offset
- 2;
1701 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1702 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1703 r_type
= R_X86_64_PC32
;
1708 unsigned int rex_mask
= REX_R
;
1710 if (r_type
== R_X86_64_REX_GOTPCRELX
)
1711 rex
= bfd_get_8 (abfd
, contents
+ roff
- 3);
1717 if (abs_symbol
&& local_ref
&& relocx
)
1718 to_reloc_pc32
= false;
1722 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1723 "lea foo(%rip), %reg". */
1725 r_type
= R_X86_64_PC32
;
1729 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1730 "mov $foo, %reg". */
1732 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1733 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1734 if ((rex
& REX_W
) != 0
1735 && ABI_64_P (link_info
->output_bfd
))
1737 /* Keep the REX_W bit in REX byte for LP64. */
1738 r_type
= R_X86_64_32S
;
1739 goto rewrite_modrm_rex
;
1743 /* If the REX_W bit in REX byte isn't needed,
1744 use R_X86_64_32 and clear the W bit to avoid
1745 sign-extend imm32 to imm64. */
1746 r_type
= R_X86_64_32
;
1747 /* Clear the W bit in REX byte. */
1749 goto rewrite_modrm_rex
;
1755 /* R_X86_64_PC32 isn't supported. */
1759 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1762 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
1763 "test $foo, %reg". */
1764 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1769 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
1770 "binop $foo, %reg". */
1771 modrm
= 0xc0 | (modrm
& 0x38) >> 3 | (opcode
& 0x3c);
1775 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
1776 overflow when sign-extending imm32 to imm64. */
1777 r_type
= (rex
& REX_W
) != 0 ? R_X86_64_32S
: R_X86_64_32
;
1782 /* Check if R_X86_64_32S/R_X86_64_32 fits. */
1783 if (r_type
== R_X86_64_32S
)
1785 if ((abs_relocation
+ 0x80000000) > 0xffffffff)
1790 if (abs_relocation
> 0xffffffff)
1795 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1799 /* Move the R bit to the B bit in REX byte. */
1800 rex
= (rex
& ~rex_mask
) | (rex
& REX_R
) >> 2;
1801 bfd_put_8 (abfd
, rex
, contents
+ roff
- 3);
1804 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
1808 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1812 irel
->r_info
= htab
->r_info (r_symndx
,
1813 r_type
| R_X86_64_converted_reloc_bit
);
1820 /* Look through the relocs for a section during the first phase, and
1821 calculate needed space in the global offset table, and procedure
1825 elf_x86_64_scan_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1827 const Elf_Internal_Rela
*relocs
)
1829 struct elf_x86_link_hash_table
*htab
;
1830 Elf_Internal_Shdr
*symtab_hdr
;
1831 struct elf_link_hash_entry
**sym_hashes
;
1832 const Elf_Internal_Rela
*rel
;
1833 const Elf_Internal_Rela
*rel_end
;
1837 if (bfd_link_relocatable (info
))
1840 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1843 sec
->check_relocs_failed
= 1;
1847 BFD_ASSERT (is_x86_elf (abfd
, htab
));
1849 /* Get the section contents. */
1850 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1851 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1852 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1854 sec
->check_relocs_failed
= 1;
1858 symtab_hdr
= &elf_symtab_hdr (abfd
);
1859 sym_hashes
= elf_sym_hashes (abfd
);
1863 rel_end
= relocs
+ sec
->reloc_count
;
1864 for (rel
= relocs
; rel
< rel_end
; rel
++)
1866 unsigned int r_type
;
1867 unsigned int r_symndx
;
1868 struct elf_link_hash_entry
*h
;
1869 struct elf_x86_link_hash_entry
*eh
;
1870 Elf_Internal_Sym
*isym
;
1873 bool converted_reloc
;
1876 r_symndx
= htab
->r_sym (rel
->r_info
);
1877 r_type
= ELF32_R_TYPE (rel
->r_info
);
1879 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1881 /* xgettext:c-format */
1882 _bfd_error_handler (_("%pB: bad symbol index: %d"),
1887 if (r_symndx
< symtab_hdr
->sh_info
)
1889 /* A local symbol. */
1890 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
1895 /* Check relocation against local STT_GNU_IFUNC symbol. */
1896 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1898 h
= _bfd_elf_x86_get_local_sym_hash (htab
, abfd
, rel
,
1903 /* Fake a STT_GNU_IFUNC symbol. */
1904 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1906 h
->type
= STT_GNU_IFUNC
;
1909 h
->forced_local
= 1;
1910 h
->root
.type
= bfd_link_hash_defined
;
1918 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1919 while (h
->root
.type
== bfd_link_hash_indirect
1920 || h
->root
.type
== bfd_link_hash_warning
)
1921 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1924 /* Check invalid x32 relocations. */
1925 if (!ABI_64_P (abfd
))
1931 case R_X86_64_DTPOFF64
:
1932 case R_X86_64_TPOFF64
:
1934 case R_X86_64_GOTOFF64
:
1935 case R_X86_64_GOT64
:
1936 case R_X86_64_GOTPCREL64
:
1937 case R_X86_64_GOTPC64
:
1938 case R_X86_64_GOTPLT64
:
1939 case R_X86_64_PLTOFF64
:
1942 name
= h
->root
.root
.string
;
1944 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1947 /* xgettext:c-format */
1948 (_("%pB: relocation %s against symbol `%s' isn't "
1949 "supported in x32 mode"), abfd
,
1950 x86_64_elf_howto_table
[r_type
].name
, name
);
1951 bfd_set_error (bfd_error_bad_value
);
1957 eh
= (struct elf_x86_link_hash_entry
*) h
;
1961 /* It is referenced by a non-shared object. */
1965 converted_reloc
= false;
1966 if ((r_type
== R_X86_64_GOTPCREL
1967 || r_type
== R_X86_64_GOTPCRELX
1968 || r_type
== R_X86_64_REX_GOTPCRELX
)
1969 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1971 Elf_Internal_Rela
*irel
= (Elf_Internal_Rela
*) rel
;
1972 if (!elf_x86_64_convert_load_reloc (abfd
, contents
, &r_type
,
1973 irel
, h
, &converted_reloc
,
1977 if (converted_reloc
)
1981 if (!_bfd_elf_x86_valid_reloc_p (sec
, info
, htab
, rel
, h
, isym
,
1982 symtab_hdr
, &no_dynreloc
))
1985 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, contents
,
1986 symtab_hdr
, sym_hashes
,
1987 &r_type
, GOT_UNKNOWN
,
1988 rel
, rel_end
, h
, r_symndx
, false))
1991 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1992 if (h
== htab
->elf
.hgot
)
1993 htab
->got_referenced
= true;
1997 case R_X86_64_TLSLD
:
1998 htab
->tls_ld_or_ldm_got
.refcount
= 1;
2001 case R_X86_64_TPOFF32
:
2002 if (!bfd_link_executable (info
) && ABI_64_P (abfd
))
2003 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
2004 &x86_64_elf_howto_table
[r_type
]);
2006 eh
->zero_undefweak
&= 0x2;
2009 case R_X86_64_GOTTPOFF
:
2010 if (!bfd_link_executable (info
))
2011 info
->flags
|= DF_STATIC_TLS
;
2014 case R_X86_64_GOT32
:
2015 case R_X86_64_GOTPCREL
:
2016 case R_X86_64_GOTPCRELX
:
2017 case R_X86_64_REX_GOTPCRELX
:
2018 case R_X86_64_TLSGD
:
2019 case R_X86_64_GOT64
:
2020 case R_X86_64_GOTPCREL64
:
2021 case R_X86_64_GOTPLT64
:
2022 case R_X86_64_GOTPC32_TLSDESC
:
2023 case R_X86_64_TLSDESC_CALL
:
2024 /* This symbol requires a global offset table entry. */
2026 int tls_type
, old_tls_type
;
2031 tls_type
= GOT_NORMAL
;
2034 if (ABS_SYMBOL_P (h
))
2037 else if (isym
->st_shndx
== SHN_ABS
)
2040 case R_X86_64_TLSGD
:
2041 tls_type
= GOT_TLS_GD
;
2043 case R_X86_64_GOTTPOFF
:
2044 tls_type
= GOT_TLS_IE
;
2046 case R_X86_64_GOTPC32_TLSDESC
:
2047 case R_X86_64_TLSDESC_CALL
:
2048 tls_type
= GOT_TLS_GDESC
;
2054 h
->got
.refcount
= 1;
2055 old_tls_type
= eh
->tls_type
;
2059 bfd_signed_vma
*local_got_refcounts
;
2061 if (!elf_x86_allocate_local_got_info (abfd
,
2062 symtab_hdr
->sh_info
))
2065 /* This is a global offset table entry for a local symbol. */
2066 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2067 local_got_refcounts
[r_symndx
] = 1;
2069 = elf_x86_local_got_tls_type (abfd
) [r_symndx
];
2072 /* If a TLS symbol is accessed using IE at least once,
2073 there is no point to use dynamic model for it. */
2074 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2075 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2076 || tls_type
!= GOT_TLS_IE
))
2078 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
2079 tls_type
= old_tls_type
;
2080 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2081 && GOT_TLS_GD_ANY_P (tls_type
))
2082 tls_type
|= old_tls_type
;
2086 name
= h
->root
.root
.string
;
2088 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
2091 /* xgettext:c-format */
2092 (_("%pB: '%s' accessed both as normal and"
2093 " thread local symbol"),
2095 bfd_set_error (bfd_error_bad_value
);
2100 if (old_tls_type
!= tls_type
)
2103 eh
->tls_type
= tls_type
;
2105 elf_x86_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2110 case R_X86_64_GOTOFF64
:
2111 case R_X86_64_GOTPC32
:
2112 case R_X86_64_GOTPC64
:
2115 eh
->zero_undefweak
&= 0x2;
2118 case R_X86_64_PLT32
:
2119 case R_X86_64_PLT32_BND
:
2120 /* This symbol requires a procedure linkage table entry. We
2121 actually build the entry in adjust_dynamic_symbol,
2122 because this might be a case of linking PIC code which is
2123 never referenced by a dynamic object, in which case we
2124 don't need to generate a procedure linkage table entry
2127 /* If this is a local symbol, we resolve it directly without
2128 creating a procedure linkage table entry. */
2132 eh
->zero_undefweak
&= 0x2;
2134 h
->plt
.refcount
= 1;
2137 case R_X86_64_PLTOFF64
:
2138 /* This tries to form the 'address' of a function relative
2139 to GOT. For global symbols we need a PLT entry. */
2143 h
->plt
.refcount
= 1;
2147 case R_X86_64_SIZE32
:
2148 case R_X86_64_SIZE64
:
2153 if (!ABI_64_P (abfd
))
2159 /* Check relocation overflow as these relocs may lead to
2160 run-time relocation overflow. Don't error out for
2161 sections we don't care about, such as debug sections or
2162 when relocation overflow check is disabled. */
2163 if (!htab
->params
->no_reloc_overflow_check
2165 && (bfd_link_pic (info
)
2166 || (bfd_link_executable (info
)
2170 && (sec
->flags
& SEC_READONLY
) == 0)))
2171 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
2172 &x86_64_elf_howto_table
[r_type
]);
2178 case R_X86_64_PC32_BND
:
2182 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2183 eh
->zero_undefweak
|= 0x2;
2184 /* We are called after all symbols have been resolved. Only
2185 relocation against STT_GNU_IFUNC symbol must go through
2188 && (bfd_link_executable (info
)
2189 || h
->type
== STT_GNU_IFUNC
))
2191 bool func_pointer_ref
= false;
2193 if (r_type
== R_X86_64_PC32
)
2195 /* Since something like ".long foo - ." may be used
2196 as pointer, make sure that PLT is used if foo is
2197 a function defined in a shared library. */
2198 if ((sec
->flags
& SEC_CODE
) == 0)
2200 h
->pointer_equality_needed
= 1;
2201 if (bfd_link_pie (info
)
2202 && h
->type
== STT_FUNC
2207 h
->plt
.refcount
= 1;
2211 else if (r_type
!= R_X86_64_PC32_BND
2212 && r_type
!= R_X86_64_PC64
)
2214 h
->pointer_equality_needed
= 1;
2215 /* At run-time, R_X86_64_64 can be resolved for both
2216 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2217 can only be resolved for x32. */
2218 if ((sec
->flags
& SEC_READONLY
) == 0
2219 && (r_type
== R_X86_64_64
2220 || (!ABI_64_P (abfd
)
2221 && (r_type
== R_X86_64_32
2222 || r_type
== R_X86_64_32S
))))
2223 func_pointer_ref
= true;
2226 if (!func_pointer_ref
)
2228 /* If this reloc is in a read-only section, we might
2229 need a copy reloc. We can't check reliably at this
2230 stage whether the section is read-only, as input
2231 sections have not yet been mapped to output sections.
2232 Tentatively set the flag for now, and correct in
2233 adjust_dynamic_symbol. */
2236 if (!elf_has_indirect_extern_access (sec
->owner
))
2237 eh
->non_got_ref_without_indirect_extern_access
= 1;
2239 /* We may need a .plt entry if the symbol is a function
2240 defined in a shared lib or is a function referenced
2241 from the code or read-only section. */
2243 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2244 h
->plt
.refcount
= 1;
2251 && NEED_DYNAMIC_RELOCATION_P (true, info
, true, h
, sec
,
2253 htab
->pointer_r_type
))
2255 struct elf_dyn_relocs
*p
;
2256 struct elf_dyn_relocs
**head
;
2258 /* If this is a global symbol, we count the number of
2259 relocations we need for this symbol. */
2261 head
= &h
->dyn_relocs
;
2264 /* Track dynamic relocs needed for local syms too.
2265 We really need local syms available to do this
2270 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
2275 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2279 /* Beware of type punned pointers vs strict aliasing
2281 vpp
= &(elf_section_data (s
)->local_dynrel
);
2282 head
= (struct elf_dyn_relocs
**)vpp
;
2286 if (p
== NULL
|| p
->sec
!= sec
)
2288 size_t amt
= sizeof *p
;
2290 p
= ((struct elf_dyn_relocs
*)
2291 bfd_alloc (htab
->elf
.dynobj
, amt
));
2302 /* Count size relocation as PC-relative relocation. */
2303 if (X86_PCREL_TYPE_P (true, r_type
) || size_reloc
)
2308 /* This relocation describes the C++ object vtable hierarchy.
2309 Reconstruct it for later use during GC. */
2310 case R_X86_64_GNU_VTINHERIT
:
2311 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2315 /* This relocation describes which C++ vtable entries are actually
2316 used. Record for later use during GC. */
2317 case R_X86_64_GNU_VTENTRY
:
2318 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2327 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2329 if (!converted
&& !_bfd_link_keep_memory (info
))
2333 /* Cache the section contents for elf_link_input_bfd if any
2334 load is converted or --no-keep-memory isn't used. */
2335 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2336 info
->cache_size
+= sec
->size
;
2340 /* Cache relocations if any load is converted. */
2341 if (elf_section_data (sec
)->relocs
!= relocs
&& converted
)
2342 elf_section_data (sec
)->relocs
= (Elf_Internal_Rela
*) relocs
;
2347 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2349 sec
->check_relocs_failed
= 1;
2354 elf_x86_64_always_size_sections (bfd
*output_bfd
,
2355 struct bfd_link_info
*info
)
2359 /* Scan relocations after rel_from_abs has been set on __ehdr_start. */
2360 for (abfd
= info
->input_bfds
;
2361 abfd
!= (bfd
*) NULL
;
2362 abfd
= abfd
->link
.next
)
2363 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
2364 && !_bfd_elf_link_iterate_on_relocs (abfd
, info
,
2365 elf_x86_64_scan_relocs
))
2368 return _bfd_x86_elf_always_size_sections (output_bfd
, info
);
2371 /* Return the relocation value for @tpoff relocation
2372 if STT_TLS virtual address is ADDRESS. */
2375 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2377 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2378 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
2379 bfd_vma static_tls_size
;
2381 /* If tls_segment is NULL, we should have signalled an error already. */
2382 if (htab
->tls_sec
== NULL
)
2385 /* Consider special static TLS alignment requirements. */
2386 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
2387 return address
- static_tls_size
- htab
->tls_sec
->vma
;
2390 /* Relocate an x86_64 ELF section. */
2393 elf_x86_64_relocate_section (bfd
*output_bfd
,
2394 struct bfd_link_info
*info
,
2396 asection
*input_section
,
2398 Elf_Internal_Rela
*relocs
,
2399 Elf_Internal_Sym
*local_syms
,
2400 asection
**local_sections
)
2402 struct elf_x86_link_hash_table
*htab
;
2403 Elf_Internal_Shdr
*symtab_hdr
;
2404 struct elf_link_hash_entry
**sym_hashes
;
2405 bfd_vma
*local_got_offsets
;
2406 bfd_vma
*local_tlsdesc_gotents
;
2407 Elf_Internal_Rela
*rel
;
2408 Elf_Internal_Rela
*wrel
;
2409 Elf_Internal_Rela
*relend
;
2410 unsigned int plt_entry_size
;
2413 /* Skip if check_relocs or scan_relocs failed. */
2414 if (input_section
->check_relocs_failed
)
2417 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
2421 if (!is_x86_elf (input_bfd
, htab
))
2423 bfd_set_error (bfd_error_wrong_format
);
2427 plt_entry_size
= htab
->plt
.plt_entry_size
;
2428 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2429 sym_hashes
= elf_sym_hashes (input_bfd
);
2430 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2431 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
2433 _bfd_x86_elf_set_tls_module_base (info
);
2436 rel
= wrel
= relocs
;
2437 relend
= relocs
+ input_section
->reloc_count
;
2438 for (; rel
< relend
; wrel
++, rel
++)
2440 unsigned int r_type
, r_type_tls
;
2441 reloc_howto_type
*howto
;
2442 unsigned long r_symndx
;
2443 struct elf_link_hash_entry
*h
;
2444 struct elf_x86_link_hash_entry
*eh
;
2445 Elf_Internal_Sym
*sym
;
2447 bfd_vma off
, offplt
, plt_offset
;
2449 bool unresolved_reloc
;
2450 bfd_reloc_status_type r
;
2452 asection
*base_got
, *resolved_plt
;
2454 bool resolved_to_zero
;
2455 bool relative_reloc
;
2456 bool converted_reloc
;
2457 bool need_copy_reloc_in_pie
;
2458 bool no_copyreloc_p
;
2460 r_type
= ELF32_R_TYPE (rel
->r_info
);
2461 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
2462 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
2469 r_symndx
= htab
->r_sym (rel
->r_info
);
2470 converted_reloc
= (r_type
& R_X86_64_converted_reloc_bit
) != 0;
2471 if (converted_reloc
)
2473 r_type
&= ~R_X86_64_converted_reloc_bit
;
2474 rel
->r_info
= htab
->r_info (r_symndx
, r_type
);
2477 howto
= elf_x86_64_rtype_to_howto (input_bfd
, r_type
);
2479 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
2484 unresolved_reloc
= false;
2485 if (r_symndx
< symtab_hdr
->sh_info
)
2487 sym
= local_syms
+ r_symndx
;
2488 sec
= local_sections
[r_symndx
];
2490 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
2492 st_size
= sym
->st_size
;
2494 /* Relocate against local STT_GNU_IFUNC symbol. */
2495 if (!bfd_link_relocatable (info
)
2496 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2498 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
,
2503 /* Set STT_GNU_IFUNC symbol value. */
2504 h
->root
.u
.def
.value
= sym
->st_value
;
2505 h
->root
.u
.def
.section
= sec
;
2510 bool warned ATTRIBUTE_UNUSED
;
2511 bool ignored ATTRIBUTE_UNUSED
;
2513 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2514 r_symndx
, symtab_hdr
, sym_hashes
,
2516 unresolved_reloc
, warned
, ignored
);
2520 if (sec
!= NULL
&& discarded_section (sec
))
2522 _bfd_clear_contents (howto
, input_bfd
, input_section
,
2523 contents
, rel
->r_offset
);
2524 wrel
->r_offset
= rel
->r_offset
;
2528 /* For ld -r, remove relocations in debug sections against
2529 sections defined in discarded sections. Not done for
2530 eh_frame editing code expects to be present. */
2531 if (bfd_link_relocatable (info
)
2532 && (input_section
->flags
& SEC_DEBUGGING
))
2538 if (bfd_link_relocatable (info
))
2545 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
2547 if (r_type
== R_X86_64_64
)
2549 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
2550 zero-extend it to 64bit if addend is zero. */
2551 r_type
= R_X86_64_32
;
2552 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2554 else if (r_type
== R_X86_64_SIZE64
)
2556 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
2557 zero-extend it to 64bit if addend is zero. */
2558 r_type
= R_X86_64_SIZE32
;
2559 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2563 eh
= (struct elf_x86_link_hash_entry
*) h
;
2565 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2566 it here if it is defined in a non-shared object. */
2568 && h
->type
== STT_GNU_IFUNC
2574 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2576 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2577 STT_GNU_IFUNC symbol as STT_FUNC. */
2578 if (elf_section_type (input_section
) == SHT_NOTE
)
2580 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2581 sections because such sections are not SEC_ALLOC and
2582 thus ld.so will not process them. */
2583 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2593 case R_X86_64_GOTPCREL
:
2594 case R_X86_64_GOTPCRELX
:
2595 case R_X86_64_REX_GOTPCRELX
:
2596 case R_X86_64_GOTPCREL64
:
2597 base_got
= htab
->elf
.sgot
;
2598 off
= h
->got
.offset
;
2600 if (base_got
== NULL
)
2603 if (off
== (bfd_vma
) -1)
2605 /* We can't use h->got.offset here to save state, or
2606 even just remember the offset, as finish_dynamic_symbol
2607 would use that as offset into .got. */
2609 if (h
->plt
.offset
== (bfd_vma
) -1)
2612 if (htab
->elf
.splt
!= NULL
)
2614 plt_index
= (h
->plt
.offset
/ plt_entry_size
2615 - htab
->plt
.has_plt0
);
2616 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2617 base_got
= htab
->elf
.sgotplt
;
2621 plt_index
= h
->plt
.offset
/ plt_entry_size
;
2622 off
= plt_index
* GOT_ENTRY_SIZE
;
2623 base_got
= htab
->elf
.igotplt
;
2626 if (h
->dynindx
== -1
2630 /* This references the local defitionion. We must
2631 initialize this entry in the global offset table.
2632 Since the offset must always be a multiple of 8,
2633 we use the least significant bit to record
2634 whether we have initialized it already.
2636 When doing a dynamic link, we create a .rela.got
2637 relocation entry to initialize the value. This
2638 is done in the finish_dynamic_symbol routine. */
2643 bfd_put_64 (output_bfd
, relocation
,
2644 base_got
->contents
+ off
);
2645 /* Note that this is harmless for the GOTPLT64
2646 case, as -1 | 1 still is -1. */
2652 relocation
= (base_got
->output_section
->vma
2653 + base_got
->output_offset
+ off
);
2658 if (h
->plt
.offset
== (bfd_vma
) -1)
2660 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2661 if (r_type
== htab
->pointer_r_type
2662 && (input_section
->flags
& SEC_CODE
) == 0)
2663 goto do_ifunc_pointer
;
2664 goto bad_ifunc_reloc
;
2667 /* STT_GNU_IFUNC symbol must go through PLT. */
2668 if (htab
->elf
.splt
!= NULL
)
2670 if (htab
->plt_second
!= NULL
)
2672 resolved_plt
= htab
->plt_second
;
2673 plt_offset
= eh
->plt_second
.offset
;
2677 resolved_plt
= htab
->elf
.splt
;
2678 plt_offset
= h
->plt
.offset
;
2683 resolved_plt
= htab
->elf
.iplt
;
2684 plt_offset
= h
->plt
.offset
;
2687 relocation
= (resolved_plt
->output_section
->vma
2688 + resolved_plt
->output_offset
+ plt_offset
);
2694 if (h
->root
.root
.string
)
2695 name
= h
->root
.root
.string
;
2697 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2700 /* xgettext:c-format */
2701 (_("%pB: relocation %s against STT_GNU_IFUNC "
2702 "symbol `%s' isn't supported"), input_bfd
,
2704 bfd_set_error (bfd_error_bad_value
);
2708 if (bfd_link_pic (info
))
2713 if (ABI_64_P (output_bfd
))
2718 if (rel
->r_addend
!= 0)
2720 if (h
->root
.root
.string
)
2721 name
= h
->root
.root
.string
;
2723 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
2726 /* xgettext:c-format */
2727 (_("%pB: relocation %s against STT_GNU_IFUNC "
2728 "symbol `%s' has non-zero addend: %" PRId64
),
2729 input_bfd
, howto
->name
, name
, (int64_t) rel
->r_addend
);
2730 bfd_set_error (bfd_error_bad_value
);
2734 /* Generate dynamic relcoation only when there is a
2735 non-GOT reference in a shared object or there is no
2737 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2738 || h
->plt
.offset
== (bfd_vma
) -1)
2740 Elf_Internal_Rela outrel
;
2743 /* Need a dynamic relocation to get the real function
2745 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2749 if (outrel
.r_offset
== (bfd_vma
) -1
2750 || outrel
.r_offset
== (bfd_vma
) -2)
2753 outrel
.r_offset
+= (input_section
->output_section
->vma
2754 + input_section
->output_offset
);
2756 if (POINTER_LOCAL_IFUNC_P (info
, h
))
2758 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
2759 h
->root
.root
.string
,
2760 h
->root
.u
.def
.section
->owner
);
2762 /* This symbol is resolved locally. */
2763 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
2764 outrel
.r_addend
= (h
->root
.u
.def
.value
2765 + h
->root
.u
.def
.section
->output_section
->vma
2766 + h
->root
.u
.def
.section
->output_offset
);
2768 if (htab
->params
->report_relative_reloc
)
2769 _bfd_x86_elf_link_report_relative_reloc
2770 (info
, input_section
, h
, sym
,
2771 "R_X86_64_IRELATIVE", &outrel
);
2775 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
2776 outrel
.r_addend
= 0;
2779 /* Dynamic relocations are stored in
2780 1. .rela.ifunc section in PIC object.
2781 2. .rela.got section in dynamic executable.
2782 3. .rela.iplt section in static executable. */
2783 if (bfd_link_pic (info
))
2784 sreloc
= htab
->elf
.irelifunc
;
2785 else if (htab
->elf
.splt
!= NULL
)
2786 sreloc
= htab
->elf
.srelgot
;
2788 sreloc
= htab
->elf
.irelplt
;
2789 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2791 /* If this reloc is against an external symbol, we
2792 do not want to fiddle with the addend. Otherwise,
2793 we need to include the symbol value so that it
2794 becomes an addend for the dynamic reloc. For an
2795 internal symbol, we have updated addend. */
2800 case R_X86_64_PC32_BND
:
2802 case R_X86_64_PLT32
:
2803 case R_X86_64_PLT32_BND
:
2809 resolved_to_zero
= (eh
!= NULL
2810 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
2812 /* When generating a shared object, the relocations handled here are
2813 copied into the output file to be resolved at run time. */
2816 case R_X86_64_GOT32
:
2817 case R_X86_64_GOT64
:
2818 /* Relocation is to the entry for this symbol in the global
2820 case R_X86_64_GOTPCREL
:
2821 case R_X86_64_GOTPCRELX
:
2822 case R_X86_64_REX_GOTPCRELX
:
2823 case R_X86_64_GOTPCREL64
:
2824 /* Use global offset table entry as symbol value. */
2825 case R_X86_64_GOTPLT64
:
2826 /* This is obsolete and treated the same as GOT64. */
2827 base_got
= htab
->elf
.sgot
;
2829 if (htab
->elf
.sgot
== NULL
)
2832 relative_reloc
= false;
2835 off
= h
->got
.offset
;
2837 && h
->plt
.offset
!= (bfd_vma
)-1
2838 && off
== (bfd_vma
)-1)
2840 /* We can't use h->got.offset here to save
2841 state, or even just remember the offset, as
2842 finish_dynamic_symbol would use that as offset into
2844 bfd_vma plt_index
= (h
->plt
.offset
/ plt_entry_size
2845 - htab
->plt
.has_plt0
);
2846 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2847 base_got
= htab
->elf
.sgotplt
;
2850 if (RESOLVED_LOCALLY_P (info
, h
, htab
))
2852 /* We must initialize this entry in the global offset
2853 table. Since the offset must always be a multiple
2854 of 8, we use the least significant bit to record
2855 whether we have initialized it already.
2857 When doing a dynamic link, we create a .rela.got
2858 relocation entry to initialize the value. This is
2859 done in the finish_dynamic_symbol routine. */
2864 bfd_put_64 (output_bfd
, relocation
,
2865 base_got
->contents
+ off
);
2866 /* Note that this is harmless for the GOTPLT64 case,
2867 as -1 | 1 still is -1. */
2870 /* NB: Don't generate relative relocation here if
2871 it has been generated by DT_RELR. */
2872 if (!info
->enable_dt_relr
2873 && GENERATE_RELATIVE_RELOC_P (info
, h
))
2875 /* If this symbol isn't dynamic in PIC,
2876 generate R_X86_64_RELATIVE here. */
2877 eh
->no_finish_dynamic_symbol
= 1;
2878 relative_reloc
= true;
2883 unresolved_reloc
= false;
2887 if (local_got_offsets
== NULL
)
2890 off
= local_got_offsets
[r_symndx
];
2892 /* The offset must always be a multiple of 8. We use
2893 the least significant bit to record whether we have
2894 already generated the necessary reloc. */
2899 bfd_put_64 (output_bfd
, relocation
,
2900 base_got
->contents
+ off
);
2901 local_got_offsets
[r_symndx
] |= 1;
2903 /* NB: GOTPCREL relocations against local absolute
2904 symbol store relocation value in the GOT slot
2905 without relative relocation. Don't generate
2906 relative relocation here if it has been generated
2908 if (!info
->enable_dt_relr
2909 && bfd_link_pic (info
)
2910 && !(sym
->st_shndx
== SHN_ABS
2911 && (r_type
== R_X86_64_GOTPCREL
2912 || r_type
== R_X86_64_GOTPCRELX
2913 || r_type
== R_X86_64_REX_GOTPCRELX
)))
2914 relative_reloc
= true;
2921 Elf_Internal_Rela outrel
;
2923 /* We need to generate a R_X86_64_RELATIVE reloc
2924 for the dynamic linker. */
2925 s
= htab
->elf
.srelgot
;
2929 outrel
.r_offset
= (base_got
->output_section
->vma
2930 + base_got
->output_offset
2932 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
2933 outrel
.r_addend
= relocation
;
2935 if (htab
->params
->report_relative_reloc
)
2936 _bfd_x86_elf_link_report_relative_reloc
2937 (info
, input_section
, h
, sym
, "R_X86_64_RELATIVE",
2940 elf_append_rela (output_bfd
, s
, &outrel
);
2943 if (off
>= (bfd_vma
) -2)
2946 relocation
= base_got
->output_section
->vma
2947 + base_got
->output_offset
+ off
;
2948 if (r_type
!= R_X86_64_GOTPCREL
2949 && r_type
!= R_X86_64_GOTPCRELX
2950 && r_type
!= R_X86_64_REX_GOTPCRELX
2951 && r_type
!= R_X86_64_GOTPCREL64
)
2952 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2953 - htab
->elf
.sgotplt
->output_offset
;
2957 case R_X86_64_GOTOFF64
:
2958 /* Relocation is relative to the start of the global offset
2961 /* Check to make sure it isn't a protected function or data
2962 symbol for shared library since it may not be local when
2963 used as function address or with copy relocation. We also
2964 need to make sure that a symbol is referenced locally. */
2965 if (bfd_link_pic (info
) && h
)
2967 if (!h
->def_regular
)
2971 switch (ELF_ST_VISIBILITY (h
->other
))
2974 v
= _("hidden symbol");
2977 v
= _("internal symbol");
2980 v
= _("protected symbol");
2988 /* xgettext:c-format */
2989 (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s"
2990 " `%s' can not be used when making a shared object"),
2991 input_bfd
, v
, h
->root
.root
.string
);
2992 bfd_set_error (bfd_error_bad_value
);
2995 else if (!bfd_link_executable (info
)
2996 && !SYMBOL_REFERENCES_LOCAL_P (info
, h
)
2997 && (h
->type
== STT_FUNC
2998 || h
->type
== STT_OBJECT
)
2999 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3002 /* xgettext:c-format */
3003 (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s"
3004 " `%s' can not be used when making a shared object"),
3006 h
->type
== STT_FUNC
? "function" : "data",
3007 h
->root
.root
.string
);
3008 bfd_set_error (bfd_error_bad_value
);
3013 /* Note that sgot is not involved in this
3014 calculation. We always want the start of .got.plt. If we
3015 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3016 permitted by the ABI, we might have to change this
3018 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3019 + htab
->elf
.sgotplt
->output_offset
;
3022 case R_X86_64_GOTPC32
:
3023 case R_X86_64_GOTPC64
:
3024 /* Use global offset table as symbol value. */
3025 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3026 + htab
->elf
.sgotplt
->output_offset
;
3027 unresolved_reloc
= false;
3030 case R_X86_64_PLTOFF64
:
3031 /* Relocation is PLT entry relative to GOT. For local
3032 symbols it's the symbol itself relative to GOT. */
3034 /* See PLT32 handling. */
3035 && (h
->plt
.offset
!= (bfd_vma
) -1
3036 || eh
->plt_got
.offset
!= (bfd_vma
) -1)
3037 && htab
->elf
.splt
!= NULL
)
3039 if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
3041 /* Use the GOT PLT. */
3042 resolved_plt
= htab
->plt_got
;
3043 plt_offset
= eh
->plt_got
.offset
;
3045 else if (htab
->plt_second
!= NULL
)
3047 resolved_plt
= htab
->plt_second
;
3048 plt_offset
= eh
->plt_second
.offset
;
3052 resolved_plt
= htab
->elf
.splt
;
3053 plt_offset
= h
->plt
.offset
;
3056 relocation
= (resolved_plt
->output_section
->vma
3057 + resolved_plt
->output_offset
3059 unresolved_reloc
= false;
3062 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3063 + htab
->elf
.sgotplt
->output_offset
;
3066 case R_X86_64_PLT32
:
3067 case R_X86_64_PLT32_BND
:
3068 /* Relocation is to the entry for this symbol in the
3069 procedure linkage table. */
3071 /* Resolve a PLT32 reloc against a local symbol directly,
3072 without using the procedure linkage table. */
3076 if ((h
->plt
.offset
== (bfd_vma
) -1
3077 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3078 || htab
->elf
.splt
== NULL
)
3080 /* We didn't make a PLT entry for this symbol. This
3081 happens when statically linking PIC code, or when
3082 using -Bsymbolic. */
3087 if (h
->plt
.offset
!= (bfd_vma
) -1)
3089 if (htab
->plt_second
!= NULL
)
3091 resolved_plt
= htab
->plt_second
;
3092 plt_offset
= eh
->plt_second
.offset
;
3096 resolved_plt
= htab
->elf
.splt
;
3097 plt_offset
= h
->plt
.offset
;
3102 /* Use the GOT PLT. */
3103 resolved_plt
= htab
->plt_got
;
3104 plt_offset
= eh
->plt_got
.offset
;
3107 relocation
= (resolved_plt
->output_section
->vma
3108 + resolved_plt
->output_offset
3110 unresolved_reloc
= false;
3113 case R_X86_64_SIZE32
:
3114 case R_X86_64_SIZE64
:
3115 /* Set to symbol size. */
3116 relocation
= st_size
;
3122 case R_X86_64_PC32_BND
:
3123 /* Don't complain about -fPIC if the symbol is undefined when
3124 building executable unless it is unresolved weak symbol,
3125 references a dynamic definition in PIE or -z nocopyreloc
3128 = (info
->nocopyreloc
3130 && !h
->root
.linker_def
3131 && !h
->root
.ldscript_def
3132 && eh
->def_protected
3133 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)));
3135 if ((input_section
->flags
& SEC_ALLOC
) != 0
3136 && (input_section
->flags
& SEC_READONLY
) != 0
3138 && ((bfd_link_executable (info
)
3139 && ((h
->root
.type
== bfd_link_hash_undefweak
3141 || !UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
3143 || (bfd_link_pie (info
)
3144 && !SYMBOL_DEFINED_NON_SHARED_P (h
)
3148 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))))
3149 || (bfd_link_pie (info
)
3150 && h
->root
.type
== bfd_link_hash_undefweak
)
3151 || bfd_link_dll (info
)))
3154 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3156 /* Symbol is referenced locally. Make sure it is
3158 fail
= !SYMBOL_DEFINED_NON_SHARED_P (h
);
3160 else if (bfd_link_pie (info
))
3162 /* We can only use PC-relative relocations in PIE
3163 from non-code sections. */
3164 if (h
->root
.type
== bfd_link_hash_undefweak
3165 || (h
->type
== STT_FUNC
3166 && (sec
->flags
& SEC_CODE
) != 0))
3169 else if (no_copyreloc_p
|| bfd_link_dll (info
))
3171 /* Symbol doesn't need copy reloc and isn't
3172 referenced locally. Don't allow PC-relative
3173 relocations against default and protected
3174 symbols since address of protected function
3175 and location of protected data may not be in
3176 the shared object. */
3177 fail
= (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3178 || ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
);
3182 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3183 h
, NULL
, NULL
, howto
);
3185 /* Since x86-64 has PC-relative PLT, we can use PLT in PIE
3186 as function address. */
3188 && (input_section
->flags
& SEC_CODE
) == 0
3189 && bfd_link_pie (info
)
3190 && h
->type
== STT_FUNC
3201 /* FIXME: The ABI says the linker should make sure the value is
3202 the same when it's zeroextended to 64 bit. */
3205 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3208 need_copy_reloc_in_pie
= (bfd_link_pie (info
)
3213 == bfd_link_hash_undefined
))
3214 && (X86_PCREL_TYPE_P (true, r_type
)
3215 || X86_SIZE_TYPE_P (true,
3218 if (GENERATE_DYNAMIC_RELOCATION_P (true, info
, eh
, r_type
, sec
,
3219 need_copy_reloc_in_pie
,
3220 resolved_to_zero
, false))
3222 Elf_Internal_Rela outrel
;
3223 bool skip
, relocate
;
3224 bool generate_dynamic_reloc
= true;
3226 const char *relative_reloc_name
= NULL
;
3228 /* When generating a shared object, these relocations
3229 are copied into the output file to be resolved at run
3235 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3237 if (outrel
.r_offset
== (bfd_vma
) -1)
3239 else if (outrel
.r_offset
== (bfd_vma
) -2)
3240 skip
= true, relocate
= true;
3242 outrel
.r_offset
+= (input_section
->output_section
->vma
3243 + input_section
->output_offset
);
3246 memset (&outrel
, 0, sizeof outrel
);
3248 else if (COPY_INPUT_RELOC_P (true, info
, h
, r_type
))
3250 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3251 outrel
.r_addend
= rel
->r_addend
;
3255 /* This symbol is local, or marked to become local.
3256 When relocation overflow check is disabled, we
3257 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
3258 if (r_type
== htab
->pointer_r_type
3259 || (r_type
== R_X86_64_32
3260 && htab
->params
->no_reloc_overflow_check
))
3263 /* NB: Don't generate relative relocation here if
3264 it has been generated by DT_RELR. */
3265 if (info
->enable_dt_relr
)
3266 generate_dynamic_reloc
= false;
3270 htab
->r_info (0, R_X86_64_RELATIVE
);
3271 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3272 relative_reloc_name
= "R_X86_64_RELATIVE";
3275 else if (r_type
== R_X86_64_64
3276 && !ABI_64_P (output_bfd
))
3279 outrel
.r_info
= htab
->r_info (0,
3280 R_X86_64_RELATIVE64
);
3281 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3282 relative_reloc_name
= "R_X86_64_RELATIVE64";
3283 /* Check addend overflow. */
3284 if ((outrel
.r_addend
& 0x80000000)
3285 != (rel
->r_addend
& 0x80000000))
3288 int addend
= rel
->r_addend
;
3289 if (h
&& h
->root
.root
.string
)
3290 name
= h
->root
.root
.string
;
3292 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3295 /* xgettext:c-format */
3296 (_("%pB: addend %s%#x in relocation %s against "
3297 "symbol `%s' at %#" PRIx64
3298 " in section `%pA' is out of range"),
3299 input_bfd
, addend
< 0 ? "-" : "", addend
,
3300 howto
->name
, name
, (uint64_t) rel
->r_offset
,
3302 bfd_set_error (bfd_error_bad_value
);
3310 if (bfd_is_abs_section (sec
))
3312 else if (sec
== NULL
|| sec
->owner
== NULL
)
3314 bfd_set_error (bfd_error_bad_value
);
3321 /* We are turning this relocation into one
3322 against a section symbol. It would be
3323 proper to subtract the symbol's value,
3324 osec->vma, from the emitted reloc addend,
3325 but ld.so expects buggy relocs. */
3326 osec
= sec
->output_section
;
3327 sindx
= elf_section_data (osec
)->dynindx
;
3330 asection
*oi
= htab
->elf
.text_index_section
;
3331 sindx
= elf_section_data (oi
)->dynindx
;
3333 BFD_ASSERT (sindx
!= 0);
3336 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3337 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3341 if (generate_dynamic_reloc
)
3343 sreloc
= elf_section_data (input_section
)->sreloc
;
3345 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3347 r
= bfd_reloc_notsupported
;
3348 goto check_relocation_error
;
3351 if (relative_reloc_name
3352 && htab
->params
->report_relative_reloc
)
3353 _bfd_x86_elf_link_report_relative_reloc
3354 (info
, input_section
, h
, sym
,
3355 relative_reloc_name
, &outrel
);
3357 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3360 /* If this reloc is against an external symbol, we do
3361 not want to fiddle with the addend. Otherwise, we
3362 need to include the symbol value so that it becomes
3363 an addend for the dynamic reloc. */
3370 case R_X86_64_TLSGD
:
3371 case R_X86_64_GOTPC32_TLSDESC
:
3372 case R_X86_64_TLSDESC_CALL
:
3373 case R_X86_64_GOTTPOFF
:
3374 tls_type
= GOT_UNKNOWN
;
3375 if (h
== NULL
&& local_got_offsets
)
3376 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
3378 tls_type
= elf_x86_hash_entry (h
)->tls_type
;
3380 r_type_tls
= r_type
;
3381 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3382 input_section
, contents
,
3383 symtab_hdr
, sym_hashes
,
3384 &r_type_tls
, tls_type
, rel
,
3385 relend
, h
, r_symndx
, true))
3388 if (r_type_tls
== R_X86_64_TPOFF32
)
3390 bfd_vma roff
= rel
->r_offset
;
3392 BFD_ASSERT (! unresolved_reloc
);
3394 if (r_type
== R_X86_64_TLSGD
)
3396 /* GD->LE transition. For 64bit, change
3397 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3398 .word 0x6666; rex64; call __tls_get_addr@PLT
3400 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3402 call *__tls_get_addr@GOTPCREL(%rip)
3403 which may be converted to
3404 addr32 call __tls_get_addr
3407 leaq foo@tpoff(%rax), %rax
3409 leaq foo@tlsgd(%rip), %rdi
3410 .word 0x6666; rex64; call __tls_get_addr@PLT
3412 leaq foo@tlsgd(%rip), %rdi
3414 call *__tls_get_addr@GOTPCREL(%rip)
3415 which may be converted to
3416 addr32 call __tls_get_addr
3419 leaq foo@tpoff(%rax), %rax
3420 For largepic, change:
3421 leaq foo@tlsgd(%rip), %rdi
3422 movabsq $__tls_get_addr@pltoff, %rax
3427 leaq foo@tpoff(%rax), %rax
3428 nopw 0x0(%rax,%rax,1) */
3430 if (ABI_64_P (output_bfd
))
3432 if (contents
[roff
+ 5] == 0xb8)
3435 || (roff
- 3 + 22) > input_section
->size
)
3438 info
->callbacks
->einfo
3439 (_("%F%P: corrupt input: %pB\n"),
3443 memcpy (contents
+ roff
- 3,
3444 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
3445 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3451 || (roff
- 4 + 16) > input_section
->size
)
3453 memcpy (contents
+ roff
- 4,
3454 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3461 || (roff
- 3 + 15) > input_section
->size
)
3463 memcpy (contents
+ roff
- 3,
3464 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3467 bfd_put_32 (output_bfd
,
3468 elf_x86_64_tpoff (info
, relocation
),
3469 contents
+ roff
+ 8 + largepic
);
3470 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
3471 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
3476 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3478 /* GDesc -> LE transition.
3479 It's originally something like:
3480 leaq x@tlsdesc(%rip), %rax <--- LP64 mode.
3481 rex leal x@tlsdesc(%rip), %eax <--- X32 mode.
3484 movq $x@tpoff, %rax <--- LP64 mode.
3485 rex movl $x@tpoff, %eax <--- X32 mode.
3488 unsigned int val
, type
;
3492 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3493 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3494 bfd_put_8 (output_bfd
,
3495 (type
& 0x48) | ((type
>> 2) & 1),
3496 contents
+ roff
- 3);
3497 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
3498 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3499 contents
+ roff
- 1);
3500 bfd_put_32 (output_bfd
,
3501 elf_x86_64_tpoff (info
, relocation
),
3505 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3507 /* GDesc -> LE transition.
3509 call *(%rax) <--- LP64 mode.
3510 call *(%eax) <--- X32 mode.
3512 xchg %ax,%ax <-- LP64 mode.
3513 nopl (%rax) <-- X32 mode.
3515 unsigned int prefix
= 0;
3516 if (!ABI_64_P (input_bfd
))
3518 /* Check for call *x@tlsdesc(%eax). */
3519 if (contents
[roff
] == 0x67)
3524 bfd_put_8 (output_bfd
, 0x0f, contents
+ roff
);
3525 bfd_put_8 (output_bfd
, 0x1f, contents
+ roff
+ 1);
3526 bfd_put_8 (output_bfd
, 0x00, contents
+ roff
+ 2);
3530 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3531 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3535 else if (r_type
== R_X86_64_GOTTPOFF
)
3537 /* IE->LE transition:
3538 For 64bit, originally it can be one of:
3539 movq foo@gottpoff(%rip), %reg
3540 addq foo@gottpoff(%rip), %reg
3543 leaq foo(%reg), %reg
3545 For 32bit, originally it can be one of:
3546 movq foo@gottpoff(%rip), %reg
3547 addl foo@gottpoff(%rip), %reg
3550 leal foo(%reg), %reg
3553 unsigned int val
, type
, reg
;
3556 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3563 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3564 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3573 bfd_put_8 (output_bfd
, 0x49,
3574 contents
+ roff
- 3);
3576 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3580 bfd_put_8 (output_bfd
, 0x41,
3581 contents
+ roff
- 3);
3583 bfd_put_8 (output_bfd
, 0xc7,
3584 contents
+ roff
- 2);
3585 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3586 contents
+ roff
- 1);
3590 /* addq/addl -> addq/addl - addressing with %rsp/%r12
3596 bfd_put_8 (output_bfd
, 0x49,
3597 contents
+ roff
- 3);
3599 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3603 bfd_put_8 (output_bfd
, 0x41,
3604 contents
+ roff
- 3);
3606 bfd_put_8 (output_bfd
, 0x81,
3607 contents
+ roff
- 2);
3608 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3609 contents
+ roff
- 1);
3613 /* addq/addl -> leaq/leal */
3618 bfd_put_8 (output_bfd
, 0x4d,
3619 contents
+ roff
- 3);
3621 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3625 bfd_put_8 (output_bfd
, 0x45,
3626 contents
+ roff
- 3);
3628 bfd_put_8 (output_bfd
, 0x8d,
3629 contents
+ roff
- 2);
3630 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
3631 contents
+ roff
- 1);
3633 bfd_put_32 (output_bfd
,
3634 elf_x86_64_tpoff (info
, relocation
),
3642 if (htab
->elf
.sgot
== NULL
)
3647 off
= h
->got
.offset
;
3648 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
3652 if (local_got_offsets
== NULL
)
3655 off
= local_got_offsets
[r_symndx
];
3656 offplt
= local_tlsdesc_gotents
[r_symndx
];
3663 Elf_Internal_Rela outrel
;
3667 if (htab
->elf
.srelgot
== NULL
)
3670 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3672 if (GOT_TLS_GDESC_P (tls_type
))
3674 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
3675 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
3676 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
3677 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3678 + htab
->elf
.sgotplt
->output_offset
3680 + htab
->sgotplt_jump_table_size
);
3681 sreloc
= htab
->elf
.srelplt
;
3683 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3685 outrel
.r_addend
= 0;
3686 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3689 sreloc
= htab
->elf
.srelgot
;
3691 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3692 + htab
->elf
.sgot
->output_offset
+ off
);
3694 if (GOT_TLS_GD_P (tls_type
))
3695 dr_type
= R_X86_64_DTPMOD64
;
3696 else if (GOT_TLS_GDESC_P (tls_type
))
3699 dr_type
= R_X86_64_TPOFF64
;
3701 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
3702 outrel
.r_addend
= 0;
3703 if ((dr_type
== R_X86_64_TPOFF64
3704 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
3705 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3706 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
3708 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3710 if (GOT_TLS_GD_P (tls_type
))
3714 BFD_ASSERT (! unresolved_reloc
);
3715 bfd_put_64 (output_bfd
,
3716 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3717 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3721 bfd_put_64 (output_bfd
, 0,
3722 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3723 outrel
.r_info
= htab
->r_info (indx
,
3725 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
3726 elf_append_rela (output_bfd
, sreloc
,
3735 local_got_offsets
[r_symndx
] |= 1;
3738 if (off
>= (bfd_vma
) -2
3739 && ! GOT_TLS_GDESC_P (tls_type
))
3741 if (r_type_tls
== r_type
)
3743 if (r_type
== R_X86_64_GOTPC32_TLSDESC
3744 || r_type
== R_X86_64_TLSDESC_CALL
)
3745 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3746 + htab
->elf
.sgotplt
->output_offset
3747 + offplt
+ htab
->sgotplt_jump_table_size
;
3749 relocation
= htab
->elf
.sgot
->output_section
->vma
3750 + htab
->elf
.sgot
->output_offset
+ off
;
3751 unresolved_reloc
= false;
3755 bfd_vma roff
= rel
->r_offset
;
3757 if (r_type
== R_X86_64_TLSGD
)
3759 /* GD->IE transition. For 64bit, change
3760 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3761 .word 0x6666; rex64; call __tls_get_addr@PLT
3763 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3765 call *__tls_get_addr@GOTPCREL(%rip
3766 which may be converted to
3767 addr32 call __tls_get_addr
3770 addq foo@gottpoff(%rip), %rax
3772 leaq foo@tlsgd(%rip), %rdi
3773 .word 0x6666; rex64; call __tls_get_addr@PLT
3775 leaq foo@tlsgd(%rip), %rdi
3777 call *__tls_get_addr@GOTPCREL(%rip)
3778 which may be converted to
3779 addr32 call __tls_get_addr
3782 addq foo@gottpoff(%rip), %rax
3783 For largepic, change:
3784 leaq foo@tlsgd(%rip), %rdi
3785 movabsq $__tls_get_addr@pltoff, %rax
3790 addq foo@gottpoff(%rax), %rax
3791 nopw 0x0(%rax,%rax,1) */
3793 if (ABI_64_P (output_bfd
))
3795 if (contents
[roff
+ 5] == 0xb8)
3798 || (roff
- 3 + 22) > input_section
->size
)
3800 memcpy (contents
+ roff
- 3,
3801 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
3802 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3808 || (roff
- 4 + 16) > input_section
->size
)
3810 memcpy (contents
+ roff
- 4,
3811 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3818 || (roff
- 3 + 15) > input_section
->size
)
3820 memcpy (contents
+ roff
- 3,
3821 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3825 relocation
= (htab
->elf
.sgot
->output_section
->vma
3826 + htab
->elf
.sgot
->output_offset
+ off
3829 - input_section
->output_section
->vma
3830 - input_section
->output_offset
3832 bfd_put_32 (output_bfd
, relocation
,
3833 contents
+ roff
+ 8 + largepic
);
3834 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
3839 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3841 /* GDesc -> IE transition.
3842 It's originally something like:
3843 leaq x@tlsdesc(%rip), %rax <--- LP64 mode.
3844 rex leal x@tlsdesc(%rip), %eax <--- X32 mode.
3847 # before xchg %ax,%ax in LP64 mode.
3848 movq x@gottpoff(%rip), %rax
3849 # before nopl (%rax) in X32 mode.
3850 rex movl x@gottpoff(%rip), %eax
3853 /* Now modify the instruction as appropriate. To
3854 turn a lea into a mov in the form we use it, it
3855 suffices to change the second byte from 0x8d to
3859 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3861 bfd_put_32 (output_bfd
,
3862 htab
->elf
.sgot
->output_section
->vma
3863 + htab
->elf
.sgot
->output_offset
+ off
3865 - input_section
->output_section
->vma
3866 - input_section
->output_offset
3871 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3873 /* GDesc -> IE transition.
3875 call *(%rax) <--- LP64 mode.
3876 call *(%eax) <--- X32 mode.
3879 xchg %ax, %ax <-- LP64 mode.
3880 nopl (%rax) <-- X32 mode.
3883 unsigned int prefix
= 0;
3884 if (!ABI_64_P (input_bfd
))
3886 /* Check for call *x@tlsdesc(%eax). */
3887 if (contents
[roff
] == 0x67)
3892 bfd_put_8 (output_bfd
, 0x0f, contents
+ roff
);
3893 bfd_put_8 (output_bfd
, 0x1f, contents
+ roff
+ 1);
3894 bfd_put_8 (output_bfd
, 0x00, contents
+ roff
+ 2);
3898 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3899 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3908 case R_X86_64_TLSLD
:
3909 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3910 input_section
, contents
,
3911 symtab_hdr
, sym_hashes
,
3912 &r_type
, GOT_UNKNOWN
, rel
,
3913 relend
, h
, r_symndx
, true))
3916 if (r_type
!= R_X86_64_TLSLD
)
3918 /* LD->LE transition:
3919 leaq foo@tlsld(%rip), %rdi
3920 call __tls_get_addr@PLT
3921 For 64bit, we change it into:
3922 .word 0x6666; .byte 0x66; movq %fs:0, %rax
3923 For 32bit, we change it into:
3924 nopl 0x0(%rax); movl %fs:0, %eax
3926 leaq foo@tlsld(%rip), %rdi;
3927 call *__tls_get_addr@GOTPCREL(%rip)
3928 which may be converted to
3929 addr32 call __tls_get_addr
3930 For 64bit, we change it into:
3931 .word 0x6666; .word 0x6666; movq %fs:0, %rax
3932 For 32bit, we change it into:
3933 nopw 0x0(%rax); movl %fs:0, %eax
3934 For largepic, change:
3935 leaq foo@tlsgd(%rip), %rdi
3936 movabsq $__tls_get_addr@pltoff, %rax
3940 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
3943 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
3944 if (ABI_64_P (output_bfd
))
3946 if ((rel
->r_offset
+ 5) >= input_section
->size
)
3948 if (contents
[rel
->r_offset
+ 5] == 0xb8)
3950 if (rel
->r_offset
< 3
3951 || (rel
->r_offset
- 3 + 22) > input_section
->size
)
3953 memcpy (contents
+ rel
->r_offset
- 3,
3954 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
3955 "\x64\x48\x8b\x04\x25\0\0\0", 22);
3957 else if (contents
[rel
->r_offset
+ 4] == 0xff
3958 || contents
[rel
->r_offset
+ 4] == 0x67)
3960 if (rel
->r_offset
< 3
3961 || (rel
->r_offset
- 3 + 13) > input_section
->size
)
3963 memcpy (contents
+ rel
->r_offset
- 3,
3964 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
3970 if (rel
->r_offset
< 3
3971 || (rel
->r_offset
- 3 + 12) > input_section
->size
)
3973 memcpy (contents
+ rel
->r_offset
- 3,
3974 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3979 if ((rel
->r_offset
+ 4) >= input_section
->size
)
3981 if (contents
[rel
->r_offset
+ 4] == 0xff)
3983 if (rel
->r_offset
< 3
3984 || (rel
->r_offset
- 3 + 13) > input_section
->size
)
3986 memcpy (contents
+ rel
->r_offset
- 3,
3987 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
3992 if (rel
->r_offset
< 3
3993 || (rel
->r_offset
- 3 + 12) > input_section
->size
)
3995 memcpy (contents
+ rel
->r_offset
- 3,
3996 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
3999 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
4000 and R_X86_64_PLTOFF64. */
4006 if (htab
->elf
.sgot
== NULL
)
4009 off
= htab
->tls_ld_or_ldm_got
.offset
;
4014 Elf_Internal_Rela outrel
;
4016 if (htab
->elf
.srelgot
== NULL
)
4019 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4020 + htab
->elf
.sgot
->output_offset
+ off
);
4022 bfd_put_64 (output_bfd
, 0,
4023 htab
->elf
.sgot
->contents
+ off
);
4024 bfd_put_64 (output_bfd
, 0,
4025 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4026 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4027 outrel
.r_addend
= 0;
4028 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4030 htab
->tls_ld_or_ldm_got
.offset
|= 1;
4032 relocation
= htab
->elf
.sgot
->output_section
->vma
4033 + htab
->elf
.sgot
->output_offset
+ off
;
4034 unresolved_reloc
= false;
4037 case R_X86_64_DTPOFF32
:
4038 if (!bfd_link_executable (info
)
4039 || (input_section
->flags
& SEC_CODE
) == 0)
4040 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
4042 relocation
= elf_x86_64_tpoff (info
, relocation
);
4045 case R_X86_64_TPOFF32
:
4046 case R_X86_64_TPOFF64
:
4047 BFD_ASSERT (bfd_link_executable (info
));
4048 relocation
= elf_x86_64_tpoff (info
, relocation
);
4051 case R_X86_64_DTPOFF64
:
4052 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4053 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
4060 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4061 because such sections are not SEC_ALLOC and thus ld.so will
4062 not process them. */
4063 if (unresolved_reloc
4064 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4066 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4067 rel
->r_offset
) != (bfd_vma
) -1)
4072 sec
= h
->root
.u
.def
.section
;
4073 if ((info
->nocopyreloc
4074 || (eh
->def_protected
4075 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
4076 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))
4077 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
4078 h
, NULL
, NULL
, howto
);
4083 /* xgettext:c-format */
4084 (_("%pB(%pA+%#" PRIx64
"): "
4085 "unresolvable %s relocation against symbol `%s'"),
4088 (uint64_t) rel
->r_offset
,
4090 h
->root
.root
.string
);
4096 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4097 contents
, rel
->r_offset
,
4098 relocation
, rel
->r_addend
);
4100 check_relocation_error
:
4101 if (r
!= bfd_reloc_ok
)
4106 name
= h
->root
.root
.string
;
4109 name
= bfd_elf_string_from_elf_section (input_bfd
,
4110 symtab_hdr
->sh_link
,
4115 name
= bfd_section_name (sec
);
4118 if (r
== bfd_reloc_overflow
)
4120 if (converted_reloc
)
4122 info
->callbacks
->einfo
4123 ("%X%H:", input_bfd
, input_section
, rel
->r_offset
);
4124 info
->callbacks
->einfo
4125 (_(" failed to convert GOTPCREL relocation against "
4126 "'%s'; relink with --no-relax\n"),
4131 (*info
->callbacks
->reloc_overflow
)
4132 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4133 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4138 /* xgettext:c-format */
4139 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
4140 input_bfd
, input_section
,
4141 (uint64_t) rel
->r_offset
, name
, (int) r
);
4152 Elf_Internal_Shdr
*rel_hdr
;
4153 size_t deleted
= rel
- wrel
;
4155 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
4156 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
4157 if (rel_hdr
->sh_size
== 0)
4159 /* It is too late to remove an empty reloc section. Leave
4161 ??? What is wrong with an empty section??? */
4162 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
4165 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
4166 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
4167 input_section
->reloc_count
-= deleted
;
4173 /* Finish up dynamic symbol handling. We set the contents of various
4174 dynamic sections here. */
4177 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4178 struct bfd_link_info
*info
,
4179 struct elf_link_hash_entry
*h
,
4180 Elf_Internal_Sym
*sym
)
4182 struct elf_x86_link_hash_table
*htab
;
4183 bool use_plt_second
;
4184 struct elf_x86_link_hash_entry
*eh
;
4185 bool local_undefweak
;
4187 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4191 /* Use the second PLT section only if there is .plt section. */
4192 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
4194 eh
= (struct elf_x86_link_hash_entry
*) h
;
4195 if (eh
->no_finish_dynamic_symbol
)
4198 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4199 resolved undefined weak symbols in executable so that their
4200 references have value 0 at run-time. */
4201 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
4203 if (h
->plt
.offset
!= (bfd_vma
) -1)
4206 bfd_vma got_offset
, plt_offset
;
4207 Elf_Internal_Rela rela
;
4209 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
4210 const struct elf_backend_data
*bed
;
4211 bfd_vma plt_got_pcrel_offset
;
4213 /* When building a static executable, use .iplt, .igot.plt and
4214 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4215 if (htab
->elf
.splt
!= NULL
)
4217 plt
= htab
->elf
.splt
;
4218 gotplt
= htab
->elf
.sgotplt
;
4219 relplt
= htab
->elf
.srelplt
;
4223 plt
= htab
->elf
.iplt
;
4224 gotplt
= htab
->elf
.igotplt
;
4225 relplt
= htab
->elf
.irelplt
;
4228 VERIFY_PLT_ENTRY (info
, h
, plt
, gotplt
, relplt
, local_undefweak
)
4230 /* Get the index in the procedure linkage table which
4231 corresponds to this symbol. This is the index of this symbol
4232 in all the symbols for which we are making plt entries. The
4233 first entry in the procedure linkage table is reserved.
4235 Get the offset into the .got table of the entry that
4236 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4237 bytes. The first three are reserved for the dynamic linker.
4239 For static executables, we don't reserve anything. */
4241 if (plt
== htab
->elf
.splt
)
4243 got_offset
= (h
->plt
.offset
/ htab
->plt
.plt_entry_size
4244 - htab
->plt
.has_plt0
);
4245 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4249 got_offset
= h
->plt
.offset
/ htab
->plt
.plt_entry_size
;
4250 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4253 /* Fill in the entry in the procedure linkage table. */
4254 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
4255 htab
->plt
.plt_entry_size
);
4258 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
4259 htab
->non_lazy_plt
->plt_entry
,
4260 htab
->non_lazy_plt
->plt_entry_size
);
4262 resolved_plt
= htab
->plt_second
;
4263 plt_offset
= eh
->plt_second
.offset
;
4268 plt_offset
= h
->plt
.offset
;
4271 /* Insert the relocation positions of the plt section. */
4273 /* Put offset the PC-relative instruction referring to the GOT entry,
4274 subtracting the size of that instruction. */
4275 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
4276 + gotplt
->output_offset
4278 - resolved_plt
->output_section
->vma
4279 - resolved_plt
->output_offset
4281 - htab
->plt
.plt_got_insn_size
);
4283 /* Check PC-relative offset overflow in PLT entry. */
4284 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
4285 /* xgettext:c-format */
4286 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"),
4287 output_bfd
, h
->root
.root
.string
);
4289 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
4290 (resolved_plt
->contents
+ plt_offset
4291 + htab
->plt
.plt_got_offset
));
4293 /* Fill in the entry in the global offset table, initially this
4294 points to the second part of the PLT entry. Leave the entry
4295 as zero for undefined weak symbol in PIE. No PLT relocation
4296 against undefined weak symbol in PIE. */
4297 if (!local_undefweak
)
4299 if (htab
->plt
.has_plt0
)
4300 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4301 + plt
->output_offset
4303 + htab
->lazy_plt
->plt_lazy_offset
),
4304 gotplt
->contents
+ got_offset
);
4306 /* Fill in the entry in the .rela.plt section. */
4307 rela
.r_offset
= (gotplt
->output_section
->vma
4308 + gotplt
->output_offset
4310 if (PLT_LOCAL_IFUNC_P (info
, h
))
4312 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4313 h
->root
.root
.string
,
4314 h
->root
.u
.def
.section
->owner
);
4316 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4317 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4318 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4319 rela
.r_addend
= (h
->root
.u
.def
.value
4320 + h
->root
.u
.def
.section
->output_section
->vma
4321 + h
->root
.u
.def
.section
->output_offset
);
4323 if (htab
->params
->report_relative_reloc
)
4324 _bfd_x86_elf_link_report_relative_reloc
4325 (info
, relplt
, h
, sym
, "R_X86_64_IRELATIVE", &rela
);
4327 /* R_X86_64_IRELATIVE comes last. */
4328 plt_index
= htab
->next_irelative_index
--;
4332 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4334 plt_index
= htab
->next_jump_slot_index
++;
4337 /* Don't fill the second and third slots in PLT entry for
4338 static executables nor without PLT0. */
4339 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
4342 = h
->plt
.offset
+ htab
->lazy_plt
->plt_plt_insn_end
;
4344 /* Put relocation index. */
4345 bfd_put_32 (output_bfd
, plt_index
,
4346 (plt
->contents
+ h
->plt
.offset
4347 + htab
->lazy_plt
->plt_reloc_offset
));
4349 /* Put offset for jmp .PLT0 and check for overflow. We don't
4350 check relocation index for overflow since branch displacement
4351 will overflow first. */
4352 if (plt0_offset
> 0x80000000)
4353 /* xgettext:c-format */
4354 info
->callbacks
->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"),
4355 output_bfd
, h
->root
.root
.string
);
4356 bfd_put_32 (output_bfd
, - plt0_offset
,
4357 (plt
->contents
+ h
->plt
.offset
4358 + htab
->lazy_plt
->plt_plt_offset
));
4361 bed
= get_elf_backend_data (output_bfd
);
4362 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4363 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4366 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4368 bfd_vma got_offset
, plt_offset
;
4369 asection
*plt
, *got
;
4371 int32_t got_pcrel_offset
;
4373 /* Set the entry in the GOT procedure linkage table. */
4374 plt
= htab
->plt_got
;
4375 got
= htab
->elf
.sgot
;
4376 got_offset
= h
->got
.offset
;
4378 if (got_offset
== (bfd_vma
) -1
4379 || (h
->type
== STT_GNU_IFUNC
&& h
->def_regular
)
4384 /* Use the non-lazy PLT entry template for the GOT PLT since they
4385 are the identical. */
4386 /* Fill in the entry in the GOT procedure linkage table. */
4387 plt_offset
= eh
->plt_got
.offset
;
4388 memcpy (plt
->contents
+ plt_offset
,
4389 htab
->non_lazy_plt
->plt_entry
,
4390 htab
->non_lazy_plt
->plt_entry_size
);
4392 /* Put offset the PC-relative instruction referring to the GOT
4393 entry, subtracting the size of that instruction. */
4394 got_pcrel_offset
= (got
->output_section
->vma
4395 + got
->output_offset
4397 - plt
->output_section
->vma
4398 - plt
->output_offset
4400 - htab
->non_lazy_plt
->plt_got_insn_size
);
4402 /* Check PC-relative offset overflow in GOT PLT entry. */
4403 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
4404 if ((got_after_plt
&& got_pcrel_offset
< 0)
4405 || (!got_after_plt
&& got_pcrel_offset
> 0))
4406 /* xgettext:c-format */
4407 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
4408 output_bfd
, h
->root
.root
.string
);
4410 bfd_put_32 (output_bfd
, got_pcrel_offset
,
4411 (plt
->contents
+ plt_offset
4412 + htab
->non_lazy_plt
->plt_got_offset
));
4415 if (!local_undefweak
4417 && (h
->plt
.offset
!= (bfd_vma
) -1
4418 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4420 /* Mark the symbol as undefined, rather than as defined in
4421 the .plt section. Leave the value if there were any
4422 relocations where pointer equality matters (this is a clue
4423 for the dynamic linker, to make function pointer
4424 comparisons work between an application and shared
4425 library), otherwise set it to zero. If a function is only
4426 called from a binary, there is no need to slow down
4427 shared libraries because of that. */
4428 sym
->st_shndx
= SHN_UNDEF
;
4429 if (!h
->pointer_equality_needed
)
4433 _bfd_x86_elf_link_fixup_ifunc_symbol (info
, htab
, h
, sym
);
4435 /* Don't generate dynamic GOT relocation against undefined weak
4436 symbol in executable. */
4437 if (h
->got
.offset
!= (bfd_vma
) -1
4438 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h
)->tls_type
)
4439 && elf_x86_hash_entry (h
)->tls_type
!= GOT_TLS_IE
4440 && !local_undefweak
)
4442 Elf_Internal_Rela rela
;
4443 asection
*relgot
= htab
->elf
.srelgot
;
4444 const char *relative_reloc_name
= NULL
;
4445 bool generate_dynamic_reloc
= true;
4447 /* This symbol has an entry in the global offset table. Set it
4449 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4452 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4453 + htab
->elf
.sgot
->output_offset
4454 + (h
->got
.offset
&~ (bfd_vma
) 1));
4456 /* If this is a static link, or it is a -Bsymbolic link and the
4457 symbol is defined locally or was forced to be local because
4458 of a version file, we just want to emit a RELATIVE reloc.
4459 The entry in the global offset table will already have been
4460 initialized in the relocate_section function. */
4462 && h
->type
== STT_GNU_IFUNC
)
4464 if (h
->plt
.offset
== (bfd_vma
) -1)
4466 /* STT_GNU_IFUNC is referenced without PLT. */
4467 if (htab
->elf
.splt
== NULL
)
4469 /* use .rel[a].iplt section to store .got relocations
4470 in static executable. */
4471 relgot
= htab
->elf
.irelplt
;
4473 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4475 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4476 h
->root
.root
.string
,
4477 h
->root
.u
.def
.section
->owner
);
4479 rela
.r_info
= htab
->r_info (0,
4480 R_X86_64_IRELATIVE
);
4481 rela
.r_addend
= (h
->root
.u
.def
.value
4482 + h
->root
.u
.def
.section
->output_section
->vma
4483 + h
->root
.u
.def
.section
->output_offset
);
4484 relative_reloc_name
= "R_X86_64_IRELATIVE";
4489 else if (bfd_link_pic (info
))
4491 /* Generate R_X86_64_GLOB_DAT. */
4499 if (!h
->pointer_equality_needed
)
4502 /* For non-shared object, we can't use .got.plt, which
4503 contains the real function addres if we need pointer
4504 equality. We load the GOT entry with the PLT entry. */
4505 if (htab
->plt_second
!= NULL
)
4507 plt
= htab
->plt_second
;
4508 plt_offset
= eh
->plt_second
.offset
;
4512 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4513 plt_offset
= h
->plt
.offset
;
4515 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4516 + plt
->output_offset
4518 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4522 else if (bfd_link_pic (info
)
4523 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4525 if (!SYMBOL_DEFINED_NON_SHARED_P (h
))
4527 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4528 if (info
->enable_dt_relr
)
4529 generate_dynamic_reloc
= false;
4532 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4533 rela
.r_addend
= (h
->root
.u
.def
.value
4534 + h
->root
.u
.def
.section
->output_section
->vma
4535 + h
->root
.u
.def
.section
->output_offset
);
4536 relative_reloc_name
= "R_X86_64_RELATIVE";
4541 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4543 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4544 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4545 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4549 if (generate_dynamic_reloc
)
4551 if (relative_reloc_name
!= NULL
4552 && htab
->params
->report_relative_reloc
)
4553 _bfd_x86_elf_link_report_relative_reloc
4554 (info
, relgot
, h
, sym
, relative_reloc_name
, &rela
);
4556 elf_append_rela (output_bfd
, relgot
, &rela
);
4562 Elf_Internal_Rela rela
;
4565 /* This symbol needs a copy reloc. Set it up. */
4566 VERIFY_COPY_RELOC (h
, htab
)
4568 rela
.r_offset
= (h
->root
.u
.def
.value
4569 + h
->root
.u
.def
.section
->output_section
->vma
4570 + h
->root
.u
.def
.section
->output_offset
);
4571 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4573 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
4574 s
= htab
->elf
.sreldynrelro
;
4576 s
= htab
->elf
.srelbss
;
4577 elf_append_rela (output_bfd
, s
, &rela
);
4583 /* Finish up local dynamic symbol handling. We set the contents of
4584 various dynamic sections here. */
4587 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4589 struct elf_link_hash_entry
*h
4590 = (struct elf_link_hash_entry
*) *slot
;
4591 struct bfd_link_info
*info
4592 = (struct bfd_link_info
*) inf
;
4594 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4598 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4599 here since undefined weak symbol may not be dynamic and may not be
4600 called for elf_x86_64_finish_dynamic_symbol. */
4603 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
4606 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
4607 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
4609 if (h
->root
.type
!= bfd_link_hash_undefweak
4610 || h
->dynindx
!= -1)
4613 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4617 /* Used to decide how to sort relocs in an optimal manner for the
4618 dynamic linker, before writing them out. */
4620 static enum elf_reloc_type_class
4621 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info
,
4622 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4623 const Elf_Internal_Rela
*rela
)
4625 bfd
*abfd
= info
->output_bfd
;
4626 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4627 struct elf_x86_link_hash_table
*htab
4628 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4630 if (htab
->elf
.dynsym
!= NULL
4631 && htab
->elf
.dynsym
->contents
!= NULL
)
4633 /* Check relocation against STT_GNU_IFUNC symbol if there are
4635 unsigned long r_symndx
= htab
->r_sym (rela
->r_info
);
4636 if (r_symndx
!= STN_UNDEF
)
4638 Elf_Internal_Sym sym
;
4639 if (!bed
->s
->swap_symbol_in (abfd
,
4640 (htab
->elf
.dynsym
->contents
4641 + r_symndx
* bed
->s
->sizeof_sym
),
4645 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
4646 return reloc_class_ifunc
;
4650 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4652 case R_X86_64_IRELATIVE
:
4653 return reloc_class_ifunc
;
4654 case R_X86_64_RELATIVE
:
4655 case R_X86_64_RELATIVE64
:
4656 return reloc_class_relative
;
4657 case R_X86_64_JUMP_SLOT
:
4658 return reloc_class_plt
;
4660 return reloc_class_copy
;
4662 return reloc_class_normal
;
4666 /* Finish up the dynamic sections. */
4669 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4670 struct bfd_link_info
*info
)
4672 struct elf_x86_link_hash_table
*htab
;
4674 htab
= _bfd_x86_elf_finish_dynamic_sections (output_bfd
, info
);
4678 if (! htab
->elf
.dynamic_sections_created
)
4681 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4683 if (bfd_is_abs_section (htab
->elf
.splt
->output_section
))
4685 info
->callbacks
->einfo
4686 (_("%F%P: discarded output section: `%pA'\n"),
4691 elf_section_data (htab
->elf
.splt
->output_section
)
4692 ->this_hdr
.sh_entsize
= htab
->plt
.plt_entry_size
;
4694 if (htab
->plt
.has_plt0
)
4696 /* Fill in the special first entry in the procedure linkage
4698 memcpy (htab
->elf
.splt
->contents
,
4699 htab
->lazy_plt
->plt0_entry
,
4700 htab
->lazy_plt
->plt0_entry_size
);
4701 /* Add offset for pushq GOT+8(%rip), since the instruction
4702 uses 6 bytes subtract this value. */
4703 bfd_put_32 (output_bfd
,
4704 (htab
->elf
.sgotplt
->output_section
->vma
4705 + htab
->elf
.sgotplt
->output_offset
4707 - htab
->elf
.splt
->output_section
->vma
4708 - htab
->elf
.splt
->output_offset
4710 (htab
->elf
.splt
->contents
4711 + htab
->lazy_plt
->plt0_got1_offset
));
4712 /* Add offset for the PC-relative instruction accessing
4713 GOT+16, subtracting the offset to the end of that
4715 bfd_put_32 (output_bfd
,
4716 (htab
->elf
.sgotplt
->output_section
->vma
4717 + htab
->elf
.sgotplt
->output_offset
4719 - htab
->elf
.splt
->output_section
->vma
4720 - htab
->elf
.splt
->output_offset
4721 - htab
->lazy_plt
->plt0_got2_insn_end
),
4722 (htab
->elf
.splt
->contents
4723 + htab
->lazy_plt
->plt0_got2_offset
));
4726 if (htab
->elf
.tlsdesc_plt
)
4728 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4729 htab
->elf
.sgot
->contents
+ htab
->elf
.tlsdesc_got
);
4731 memcpy (htab
->elf
.splt
->contents
+ htab
->elf
.tlsdesc_plt
,
4732 htab
->lazy_plt
->plt_tlsdesc_entry
,
4733 htab
->lazy_plt
->plt_tlsdesc_entry_size
);
4735 /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4
4736 bytes and the instruction uses 6 bytes, subtract these
4738 bfd_put_32 (output_bfd
,
4739 (htab
->elf
.sgotplt
->output_section
->vma
4740 + htab
->elf
.sgotplt
->output_offset
4742 - htab
->elf
.splt
->output_section
->vma
4743 - htab
->elf
.splt
->output_offset
4744 - htab
->elf
.tlsdesc_plt
4745 - htab
->lazy_plt
->plt_tlsdesc_got1_insn_end
),
4746 (htab
->elf
.splt
->contents
4747 + htab
->elf
.tlsdesc_plt
4748 + htab
->lazy_plt
->plt_tlsdesc_got1_offset
));
4749 /* Add offset for indirect branch via GOT+TDG, where TDG
4750 stands for htab->tlsdesc_got, subtracting the offset
4751 to the end of that instruction. */
4752 bfd_put_32 (output_bfd
,
4753 (htab
->elf
.sgot
->output_section
->vma
4754 + htab
->elf
.sgot
->output_offset
4755 + htab
->elf
.tlsdesc_got
4756 - htab
->elf
.splt
->output_section
->vma
4757 - htab
->elf
.splt
->output_offset
4758 - htab
->elf
.tlsdesc_plt
4759 - htab
->lazy_plt
->plt_tlsdesc_got2_insn_end
),
4760 (htab
->elf
.splt
->contents
4761 + htab
->elf
.tlsdesc_plt
4762 + htab
->lazy_plt
->plt_tlsdesc_got2_offset
));
4766 /* Fill PLT entries for undefined weak symbols in PIE. */
4767 if (bfd_link_pie (info
))
4768 bfd_hash_traverse (&info
->hash
->table
,
4769 elf_x86_64_pie_finish_undefweak_symbol
,
4775 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4776 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4777 It has to be done before elf_link_sort_relocs is called so that
4778 dynamic relocations are properly sorted. */
4781 elf_x86_64_output_arch_local_syms
4782 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4783 struct bfd_link_info
*info
,
4784 void *flaginfo ATTRIBUTE_UNUSED
,
4785 int (*func
) (void *, const char *,
4788 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
4790 struct elf_x86_link_hash_table
*htab
4791 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4795 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4796 htab_traverse (htab
->loc_hash_table
,
4797 elf_x86_64_finish_local_dynamic_symbol
,
4803 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4804 dynamic relocations. */
4807 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
4808 long symcount ATTRIBUTE_UNUSED
,
4809 asymbol
**syms ATTRIBUTE_UNUSED
,
4816 bfd_byte
*plt_contents
;
4818 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
4819 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
4820 const struct elf_x86_lazy_plt_layout
*lazy_bnd_plt
;
4821 const struct elf_x86_non_lazy_plt_layout
*non_lazy_bnd_plt
;
4822 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
4823 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
4825 enum elf_x86_plt_type plt_type
;
4826 struct elf_x86_plt plts
[] =
4828 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
4829 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
4830 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4831 { ".plt.bnd", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4832 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
4837 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
4840 if (dynsymcount
<= 0)
4843 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
4847 lazy_plt
= &elf_x86_64_lazy_plt
;
4848 non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
4849 lazy_bnd_plt
= &elf_x86_64_lazy_bnd_plt
;
4850 non_lazy_bnd_plt
= &elf_x86_64_non_lazy_bnd_plt
;
4851 if (ABI_64_P (abfd
))
4853 lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
4854 non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
4858 lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
4859 non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
4863 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
4865 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
4866 if (plt
== NULL
|| plt
->size
== 0)
4869 /* Get the PLT section contents. */
4870 if (!bfd_malloc_and_get_section (abfd
, plt
, &plt_contents
))
4873 /* Check what kind of PLT it is. */
4874 plt_type
= plt_unknown
;
4875 if (plts
[j
].type
== plt_unknown
4876 && (plt
->size
>= (lazy_plt
->plt_entry_size
4877 + lazy_plt
->plt_entry_size
)))
4879 /* Match lazy PLT first. Need to check the first two
4881 if ((memcmp (plt_contents
, lazy_plt
->plt0_entry
,
4882 lazy_plt
->plt0_got1_offset
) == 0)
4883 && (memcmp (plt_contents
+ 6, lazy_plt
->plt0_entry
+ 6,
4885 plt_type
= plt_lazy
;
4886 else if (lazy_bnd_plt
!= NULL
4887 && (memcmp (plt_contents
, lazy_bnd_plt
->plt0_entry
,
4888 lazy_bnd_plt
->plt0_got1_offset
) == 0)
4889 && (memcmp (plt_contents
+ 6,
4890 lazy_bnd_plt
->plt0_entry
+ 6, 3) == 0))
4892 plt_type
= plt_lazy
| plt_second
;
4893 /* The fist entry in the lazy IBT PLT is the same as the
4895 if ((memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
4896 lazy_ibt_plt
->plt_entry
,
4897 lazy_ibt_plt
->plt_got_offset
) == 0))
4898 lazy_plt
= lazy_ibt_plt
;
4900 lazy_plt
= lazy_bnd_plt
;
4904 if (non_lazy_plt
!= NULL
4905 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
4906 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
4908 /* Match non-lazy PLT. */
4909 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
4910 non_lazy_plt
->plt_got_offset
) == 0)
4911 plt_type
= plt_non_lazy
;
4914 if (plt_type
== plt_unknown
|| plt_type
== plt_second
)
4916 if (non_lazy_bnd_plt
!= NULL
4917 && plt
->size
>= non_lazy_bnd_plt
->plt_entry_size
4918 && (memcmp (plt_contents
, non_lazy_bnd_plt
->plt_entry
,
4919 non_lazy_bnd_plt
->plt_got_offset
) == 0))
4921 /* Match BND PLT. */
4922 plt_type
= plt_second
;
4923 non_lazy_plt
= non_lazy_bnd_plt
;
4925 else if (non_lazy_ibt_plt
!= NULL
4926 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
4927 && (memcmp (plt_contents
,
4928 non_lazy_ibt_plt
->plt_entry
,
4929 non_lazy_ibt_plt
->plt_got_offset
) == 0))
4931 /* Match IBT PLT. */
4932 plt_type
= plt_second
;
4933 non_lazy_plt
= non_lazy_ibt_plt
;
4937 if (plt_type
== plt_unknown
)
4939 free (plt_contents
);
4944 plts
[j
].type
= plt_type
;
4946 if ((plt_type
& plt_lazy
))
4948 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
4949 plts
[j
].plt_got_insn_size
= lazy_plt
->plt_got_insn_size
;
4950 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
4951 /* Skip PLT0 in lazy PLT. */
4956 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
4957 plts
[j
].plt_got_insn_size
= non_lazy_plt
->plt_got_insn_size
;
4958 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
4962 /* Skip lazy PLT when the second PLT is used. */
4963 if (plt_type
== (plt_lazy
| plt_second
))
4967 n
= plt
->size
/ plts
[j
].plt_entry_size
;
4972 plts
[j
].contents
= plt_contents
;
4975 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
4976 (bfd_vma
) 0, plts
, dynsyms
,
4980 /* Handle an x86-64 specific section when reading an object file. This
4981 is called when elfcode.h finds a section with an unknown type. */
4984 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
4985 const char *name
, int shindex
)
4987 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4990 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4996 /* Hook called by the linker routine which adds symbols from an object
4997 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5001 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5002 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5003 Elf_Internal_Sym
*sym
,
5004 const char **namep ATTRIBUTE_UNUSED
,
5005 flagword
*flagsp ATTRIBUTE_UNUSED
,
5011 switch (sym
->st_shndx
)
5013 case SHN_X86_64_LCOMMON
:
5014 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5017 lcomm
= bfd_make_section_with_flags (abfd
,
5021 | SEC_LINKER_CREATED
));
5024 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5027 *valp
= sym
->st_size
;
5035 /* Given a BFD section, try to locate the corresponding ELF section
5039 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5040 asection
*sec
, int *index_return
)
5042 if (sec
== &_bfd_elf_large_com_section
)
5044 *index_return
= SHN_X86_64_LCOMMON
;
5050 /* Process a symbol. */
5053 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5056 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5058 switch (elfsym
->internal_elf_sym
.st_shndx
)
5060 case SHN_X86_64_LCOMMON
:
5061 asym
->section
= &_bfd_elf_large_com_section
;
5062 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5063 /* Common symbol doesn't set BSF_GLOBAL. */
5064 asym
->flags
&= ~BSF_GLOBAL
;
5070 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5072 return (sym
->st_shndx
== SHN_COMMON
5073 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5077 elf_x86_64_common_section_index (asection
*sec
)
5079 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5082 return SHN_X86_64_LCOMMON
;
5086 elf_x86_64_common_section (asection
*sec
)
5088 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5089 return bfd_com_section_ptr
;
5091 return &_bfd_elf_large_com_section
;
5095 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5096 const Elf_Internal_Sym
*sym
,
5101 const asection
*oldsec
)
5103 /* A normal common symbol and a large common symbol result in a
5104 normal common symbol. We turn the large common symbol into a
5107 && h
->root
.type
== bfd_link_hash_common
5109 && bfd_is_com_section (*psec
)
5112 if (sym
->st_shndx
== SHN_COMMON
5113 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5115 h
->root
.u
.c
.p
->section
5116 = bfd_make_section_old_way (oldbfd
, "COMMON");
5117 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5119 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5120 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5121 *psec
= bfd_com_section_ptr
;
5128 elf_x86_64_additional_program_headers (bfd
*abfd
,
5129 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5134 /* Check to see if we need a large readonly segment. */
5135 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5136 if (s
&& (s
->flags
& SEC_LOAD
))
5139 /* Check to see if we need a large data segment. Since .lbss sections
5140 is placed right after the .bss section, there should be no need for
5141 a large data segment just because of .lbss. */
5142 s
= bfd_get_section_by_name (abfd
, ".ldata");
5143 if (s
&& (s
->flags
& SEC_LOAD
))
5149 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5152 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5153 const bfd_target
*output
)
5155 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5156 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5157 && _bfd_elf_relocs_compatible (input
, output
));
5160 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
5161 with GNU properties if found. Otherwise, return NULL. */
5164 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info
*info
)
5166 struct elf_x86_init_table init_table
;
5167 const struct elf_backend_data
*bed
;
5168 struct elf_x86_link_hash_table
*htab
;
5170 if ((int) R_X86_64_standard
>= (int) R_X86_64_converted_reloc_bit
5171 || (int) R_X86_64_max
<= (int) R_X86_64_converted_reloc_bit
5172 || ((int) (R_X86_64_GNU_VTINHERIT
| R_X86_64_converted_reloc_bit
)
5173 != (int) R_X86_64_GNU_VTINHERIT
)
5174 || ((int) (R_X86_64_GNU_VTENTRY
| R_X86_64_converted_reloc_bit
)
5175 != (int) R_X86_64_GNU_VTENTRY
))
5178 /* This is unused for x86-64. */
5179 init_table
.plt0_pad_byte
= 0x90;
5181 bed
= get_elf_backend_data (info
->output_bfd
);
5182 htab
= elf_x86_hash_table (info
, bed
->target_id
);
5185 if (htab
->params
->bndplt
)
5187 init_table
.lazy_plt
= &elf_x86_64_lazy_bnd_plt
;
5188 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_bnd_plt
;
5192 init_table
.lazy_plt
= &elf_x86_64_lazy_plt
;
5193 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
5196 if (ABI_64_P (info
->output_bfd
))
5198 init_table
.lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
5199 init_table
.non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
5203 init_table
.lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
5204 init_table
.non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
5207 if (ABI_64_P (info
->output_bfd
))
5209 init_table
.r_info
= elf64_r_info
;
5210 init_table
.r_sym
= elf64_r_sym
;
5214 init_table
.r_info
= elf32_r_info
;
5215 init_table
.r_sym
= elf32_r_sym
;
5218 return _bfd_x86_elf_link_setup_gnu_properties (info
, &init_table
);
5221 static const struct bfd_elf_special_section
5222 elf_x86_64_special_sections
[]=
5224 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5225 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5226 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5227 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5228 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5229 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5230 { NULL
, 0, 0, 0, 0 }
5233 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5234 #define TARGET_LITTLE_NAME "elf64-x86-64"
5235 #define ELF_ARCH bfd_arch_i386
5236 #define ELF_TARGET_ID X86_64_ELF_DATA
5237 #define ELF_MACHINE_CODE EM_X86_64
5238 #if DEFAULT_LD_Z_SEPARATE_CODE
5239 # define ELF_MAXPAGESIZE 0x1000
5241 # define ELF_MAXPAGESIZE 0x200000
5243 #define ELF_COMMONPAGESIZE 0x1000
5245 #define elf_backend_can_gc_sections 1
5246 #define elf_backend_can_refcount 1
5247 #define elf_backend_want_got_plt 1
5248 #define elf_backend_plt_readonly 1
5249 #define elf_backend_want_plt_sym 0
5250 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5251 #define elf_backend_rela_normal 1
5252 #define elf_backend_plt_alignment 4
5253 #define elf_backend_extern_protected_data 1
5254 #define elf_backend_caches_rawsize 1
5255 #define elf_backend_dtrel_excludes_plt 1
5256 #define elf_backend_want_dynrelro 1
5258 #define elf_info_to_howto elf_x86_64_info_to_howto
5260 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5261 #define bfd_elf64_bfd_reloc_name_lookup \
5262 elf_x86_64_reloc_name_lookup
5264 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5265 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5266 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5267 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5268 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5269 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
5270 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5271 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5273 #define elf_backend_write_core_note elf_x86_64_write_core_note
5275 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5276 #define elf_backend_relocate_section elf_x86_64_relocate_section
5277 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5278 #define elf_backend_object_p elf64_x86_64_elf_object_p
5279 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5281 #define elf_backend_section_from_shdr \
5282 elf_x86_64_section_from_shdr
5284 #define elf_backend_section_from_bfd_section \
5285 elf_x86_64_elf_section_from_bfd_section
5286 #define elf_backend_add_symbol_hook \
5287 elf_x86_64_add_symbol_hook
5288 #define elf_backend_symbol_processing \
5289 elf_x86_64_symbol_processing
5290 #define elf_backend_common_section_index \
5291 elf_x86_64_common_section_index
5292 #define elf_backend_common_section \
5293 elf_x86_64_common_section
5294 #define elf_backend_common_definition \
5295 elf_x86_64_common_definition
5296 #define elf_backend_merge_symbol \
5297 elf_x86_64_merge_symbol
5298 #define elf_backend_special_sections \
5299 elf_x86_64_special_sections
5300 #define elf_backend_additional_program_headers \
5301 elf_x86_64_additional_program_headers
5302 #define elf_backend_setup_gnu_properties \
5303 elf_x86_64_link_setup_gnu_properties
5304 #define elf_backend_hide_symbol \
5305 _bfd_x86_elf_hide_symbol
5308 #define elf64_bed elf64_x86_64_bed
5310 #include "elf64-target.h"
5312 /* CloudABI support. */
5314 #undef TARGET_LITTLE_SYM
5315 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5316 #undef TARGET_LITTLE_NAME
5317 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5320 #define ELF_OSABI ELFOSABI_CLOUDABI
5323 #define elf64_bed elf64_x86_64_cloudabi_bed
5325 #include "elf64-target.h"
5327 /* FreeBSD support. */
5329 #undef TARGET_LITTLE_SYM
5330 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5331 #undef TARGET_LITTLE_NAME
5332 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5335 #define ELF_OSABI ELFOSABI_FREEBSD
5338 #define elf64_bed elf64_x86_64_fbsd_bed
5340 #include "elf64-target.h"
5342 /* Solaris 2 support. */
5344 #undef TARGET_LITTLE_SYM
5345 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5346 #undef TARGET_LITTLE_NAME
5347 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5349 #undef ELF_TARGET_OS
5350 #define ELF_TARGET_OS is_solaris
5352 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5353 objects won't be recognized. */
5357 #define elf64_bed elf64_x86_64_sol2_bed
5359 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5361 #undef elf_backend_static_tls_alignment
5362 #define elf_backend_static_tls_alignment 16
5364 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5366 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5368 #undef elf_backend_want_plt_sym
5369 #define elf_backend_want_plt_sym 1
5371 #undef elf_backend_strtab_flags
5372 #define elf_backend_strtab_flags SHF_STRINGS
5375 elf64_x86_64_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
5376 bfd
*obfd ATTRIBUTE_UNUSED
,
5377 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
5378 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
5380 /* PR 19938: FIXME: Need to add code for setting the sh_info
5381 and sh_link fields of Solaris specific section types. */
5385 #undef elf_backend_copy_special_section_fields
5386 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
5388 #include "elf64-target.h"
5390 /* Restore defaults. */
5392 #undef elf_backend_static_tls_alignment
5393 #undef elf_backend_want_plt_sym
5394 #define elf_backend_want_plt_sym 0
5395 #undef elf_backend_strtab_flags
5396 #undef elf_backend_copy_special_section_fields
5398 /* Intel L1OM support. */
5401 elf64_l1om_elf_object_p (bfd
*abfd
)
5403 /* Set the right machine number for an L1OM elf64 file. */
5404 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5408 #undef TARGET_LITTLE_SYM
5409 #define TARGET_LITTLE_SYM l1om_elf64_vec
5410 #undef TARGET_LITTLE_NAME
5411 #define TARGET_LITTLE_NAME "elf64-l1om"
5413 #define ELF_ARCH bfd_arch_l1om
5415 #undef ELF_MACHINE_CODE
5416 #define ELF_MACHINE_CODE EM_L1OM
5421 #define elf64_bed elf64_l1om_bed
5423 #undef elf_backend_object_p
5424 #define elf_backend_object_p elf64_l1om_elf_object_p
5426 /* Restore defaults. */
5427 #undef ELF_TARGET_OS
5429 #include "elf64-target.h"
5431 /* FreeBSD L1OM support. */
5433 #undef TARGET_LITTLE_SYM
5434 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5435 #undef TARGET_LITTLE_NAME
5436 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5439 #define ELF_OSABI ELFOSABI_FREEBSD
5442 #define elf64_bed elf64_l1om_fbsd_bed
5444 #include "elf64-target.h"
5446 /* Intel K1OM support. */
5449 elf64_k1om_elf_object_p (bfd
*abfd
)
5451 /* Set the right machine number for an K1OM elf64 file. */
5452 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5456 #undef TARGET_LITTLE_SYM
5457 #define TARGET_LITTLE_SYM k1om_elf64_vec
5458 #undef TARGET_LITTLE_NAME
5459 #define TARGET_LITTLE_NAME "elf64-k1om"
5461 #define ELF_ARCH bfd_arch_k1om
5463 #undef ELF_MACHINE_CODE
5464 #define ELF_MACHINE_CODE EM_K1OM
5469 #define elf64_bed elf64_k1om_bed
5471 #undef elf_backend_object_p
5472 #define elf_backend_object_p elf64_k1om_elf_object_p
5474 #include "elf64-target.h"
5476 /* FreeBSD K1OM support. */
5478 #undef TARGET_LITTLE_SYM
5479 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
5480 #undef TARGET_LITTLE_NAME
5481 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5484 #define ELF_OSABI ELFOSABI_FREEBSD
5487 #define elf64_bed elf64_k1om_fbsd_bed
5489 #include "elf64-target.h"
5491 /* 32bit x86-64 support. */
5493 #undef TARGET_LITTLE_SYM
5494 #define TARGET_LITTLE_SYM x86_64_elf32_vec
5495 #undef TARGET_LITTLE_NAME
5496 #define TARGET_LITTLE_NAME "elf32-x86-64"
5498 #define elf32_bed elf32_x86_64_bed
5501 #define ELF_ARCH bfd_arch_i386
5503 #undef ELF_MACHINE_CODE
5504 #define ELF_MACHINE_CODE EM_X86_64
5508 #define bfd_elf32_bfd_reloc_type_lookup \
5509 elf_x86_64_reloc_type_lookup
5510 #define bfd_elf32_bfd_reloc_name_lookup \
5511 elf_x86_64_reloc_name_lookup
5512 #define bfd_elf32_get_synthetic_symtab \
5513 elf_x86_64_get_synthetic_symtab
5515 #undef elf_backend_object_p
5516 #define elf_backend_object_p \
5517 elf32_x86_64_elf_object_p
5519 #undef elf_backend_bfd_from_remote_memory
5520 #define elf_backend_bfd_from_remote_memory \
5521 _bfd_elf32_bfd_from_remote_memory
5523 #undef elf_backend_size_info
5524 #define elf_backend_size_info \
5525 _bfd_elf32_size_info
5527 #include "elf32-target.h"