1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2021 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"
27 #include "elf/x86-64.h"
34 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
35 #define MINUS_ONE (~ (bfd_vma) 0)
37 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
38 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
39 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
40 since they are the same. */
42 /* The relocation "howto" table. Order of fields:
43 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
44 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
45 static reloc_howto_type x86_64_elf_howto_table
[] =
47 HOWTO(R_X86_64_NONE
, 0, 3, 0, false, 0, complain_overflow_dont
,
48 bfd_elf_generic_reloc
, "R_X86_64_NONE", false, 0, 0x00000000,
50 HOWTO(R_X86_64_64
, 0, 4, 64, false, 0, complain_overflow_dont
,
51 bfd_elf_generic_reloc
, "R_X86_64_64", false, 0, MINUS_ONE
,
53 HOWTO(R_X86_64_PC32
, 0, 2, 32, true, 0, complain_overflow_signed
,
54 bfd_elf_generic_reloc
, "R_X86_64_PC32", false, 0, 0xffffffff,
56 HOWTO(R_X86_64_GOT32
, 0, 2, 32, false, 0, complain_overflow_signed
,
57 bfd_elf_generic_reloc
, "R_X86_64_GOT32", false, 0, 0xffffffff,
59 HOWTO(R_X86_64_PLT32
, 0, 2, 32, true, 0, complain_overflow_signed
,
60 bfd_elf_generic_reloc
, "R_X86_64_PLT32", false, 0, 0xffffffff,
62 HOWTO(R_X86_64_COPY
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
63 bfd_elf_generic_reloc
, "R_X86_64_COPY", false, 0, 0xffffffff,
65 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, false, 0, complain_overflow_dont
,
66 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", false, 0, MINUS_ONE
,
68 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, false, 0, complain_overflow_dont
,
69 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", false, 0, MINUS_ONE
,
71 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, false, 0, complain_overflow_dont
,
72 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", false, 0, MINUS_ONE
,
74 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, true, 0, complain_overflow_signed
,
75 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", false, 0, 0xffffffff,
77 HOWTO(R_X86_64_32
, 0, 2, 32, false, 0, complain_overflow_unsigned
,
78 bfd_elf_generic_reloc
, "R_X86_64_32", false, 0, 0xffffffff,
80 HOWTO(R_X86_64_32S
, 0, 2, 32, false, 0, complain_overflow_signed
,
81 bfd_elf_generic_reloc
, "R_X86_64_32S", false, 0, 0xffffffff,
83 HOWTO(R_X86_64_16
, 0, 1, 16, false, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_X86_64_16", false, 0, 0xffff, false),
85 HOWTO(R_X86_64_PC16
, 0, 1, 16, true, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_X86_64_PC16", false, 0, 0xffff, true),
87 HOWTO(R_X86_64_8
, 0, 0, 8, false, 0, complain_overflow_bitfield
,
88 bfd_elf_generic_reloc
, "R_X86_64_8", false, 0, 0xff, false),
89 HOWTO(R_X86_64_PC8
, 0, 0, 8, true, 0, complain_overflow_signed
,
90 bfd_elf_generic_reloc
, "R_X86_64_PC8", false, 0, 0xff, true),
91 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, false, 0, complain_overflow_dont
,
92 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", false, 0, MINUS_ONE
,
94 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, false, 0, complain_overflow_dont
,
95 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", false, 0, MINUS_ONE
,
97 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, false, 0, complain_overflow_dont
,
98 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", false, 0, MINUS_ONE
,
100 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, true, 0, complain_overflow_signed
,
101 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", false, 0, 0xffffffff,
103 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, true, 0, complain_overflow_signed
,
104 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", false, 0, 0xffffffff,
106 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, false, 0, complain_overflow_signed
,
107 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", false, 0, 0xffffffff,
109 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, true, 0, complain_overflow_signed
,
110 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", false, 0, 0xffffffff,
112 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, false, 0, complain_overflow_signed
,
113 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", false, 0, 0xffffffff,
115 HOWTO(R_X86_64_PC64
, 0, 4, 64, true, 0, complain_overflow_dont
,
116 bfd_elf_generic_reloc
, "R_X86_64_PC64", false, 0, MINUS_ONE
,
118 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, false, 0, complain_overflow_dont
,
119 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64", false, 0, MINUS_ONE
,
121 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, true, 0, complain_overflow_signed
,
122 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32", false, 0, 0xffffffff,
124 HOWTO(R_X86_64_GOT64
, 0, 4, 64, false, 0, complain_overflow_signed
,
125 bfd_elf_generic_reloc
, "R_X86_64_GOT64", false, 0, MINUS_ONE
,
127 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, true, 0, complain_overflow_signed
,
128 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", false, 0, MINUS_ONE
,
130 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, true, 0, complain_overflow_signed
,
131 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64", false, 0, MINUS_ONE
,
133 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, false, 0, complain_overflow_signed
,
134 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", false, 0, MINUS_ONE
,
136 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, false, 0, complain_overflow_signed
,
137 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", false, 0, MINUS_ONE
,
139 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, false, 0, complain_overflow_unsigned
,
140 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", false, 0, 0xffffffff,
142 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, false, 0, complain_overflow_dont
,
143 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", false, 0, MINUS_ONE
,
145 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, true, 0,
146 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
147 "R_X86_64_GOTPC32_TLSDESC", false, 0, 0xffffffff, true),
148 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 3, 0, false, 0,
149 complain_overflow_dont
, bfd_elf_generic_reloc
,
150 "R_X86_64_TLSDESC_CALL",
152 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, false, 0,
153 complain_overflow_dont
, bfd_elf_generic_reloc
,
154 "R_X86_64_TLSDESC", false, 0, MINUS_ONE
, false),
155 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, false, 0, complain_overflow_dont
,
156 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", false, 0, MINUS_ONE
,
158 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, false, 0, complain_overflow_dont
,
159 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", false, 0, MINUS_ONE
,
161 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, true, 0, complain_overflow_signed
,
162 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", false, 0, 0xffffffff,
164 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, true, 0, complain_overflow_signed
,
165 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", false, 0, 0xffffffff,
167 HOWTO(R_X86_64_GOTPCRELX
, 0, 2, 32, true, 0, complain_overflow_signed
,
168 bfd_elf_generic_reloc
, "R_X86_64_GOTPCRELX", false, 0, 0xffffffff,
170 HOWTO(R_X86_64_REX_GOTPCRELX
, 0, 2, 32, true, 0, complain_overflow_signed
,
171 bfd_elf_generic_reloc
, "R_X86_64_REX_GOTPCRELX", false, 0, 0xffffffff,
174 /* We have a gap in the reloc numbers here.
175 R_X86_64_standard counts the number up to this point, and
176 R_X86_64_vt_offset is the value to subtract from a reloc type of
177 R_X86_64_GNU_VT* to form an index into this table. */
178 #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
179 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
181 /* GNU extension to record C++ vtable hierarchy. */
182 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, false, 0, complain_overflow_dont
,
183 NULL
, "R_X86_64_GNU_VTINHERIT", false, 0, 0, false),
185 /* GNU extension to record C++ vtable member usage. */
186 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, false, 0, complain_overflow_dont
,
187 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", false, 0, 0,
190 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
191 HOWTO(R_X86_64_32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,
192 bfd_elf_generic_reloc
, "R_X86_64_32", false, 0, 0xffffffff,
196 #define X86_PCREL_TYPE_P(TYPE) \
197 ( ((TYPE) == R_X86_64_PC8) \
198 || ((TYPE) == R_X86_64_PC16) \
199 || ((TYPE) == R_X86_64_PC32) \
200 || ((TYPE) == R_X86_64_PC32_BND) \
201 || ((TYPE) == R_X86_64_PC64))
203 #define X86_SIZE_TYPE_P(TYPE) \
204 ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64)
206 /* Map BFD relocs to the x86_64 elf relocs. */
209 bfd_reloc_code_real_type bfd_reloc_val
;
210 unsigned char elf_reloc_val
;
213 static const struct elf_reloc_map x86_64_reloc_map
[] =
215 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
216 { BFD_RELOC_64
, R_X86_64_64
, },
217 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
218 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
219 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
220 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
221 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
222 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
223 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
224 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
225 { BFD_RELOC_32
, R_X86_64_32
, },
226 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
227 { BFD_RELOC_16
, R_X86_64_16
, },
228 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
229 { BFD_RELOC_8
, R_X86_64_8
, },
230 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
231 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
232 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
233 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
234 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
235 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
236 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
237 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
238 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
239 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
240 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
241 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
242 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
243 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
244 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
245 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
246 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
247 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
248 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
249 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
250 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
251 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
252 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
253 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
, },
254 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
, },
255 { BFD_RELOC_X86_64_GOTPCRELX
, R_X86_64_GOTPCRELX
, },
256 { BFD_RELOC_X86_64_REX_GOTPCRELX
, R_X86_64_REX_GOTPCRELX
, },
257 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
258 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
261 static reloc_howto_type
*
262 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
266 if (r_type
== (unsigned int) R_X86_64_32
)
271 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
273 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
274 || r_type
>= (unsigned int) R_X86_64_max
)
276 if (r_type
>= (unsigned int) R_X86_64_standard
)
278 /* xgettext:c-format */
279 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
281 bfd_set_error (bfd_error_bad_value
);
287 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
288 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
289 return &x86_64_elf_howto_table
[i
];
292 /* Given a BFD reloc type, return a HOWTO structure. */
293 static reloc_howto_type
*
294 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
295 bfd_reloc_code_real_type code
)
299 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
302 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
303 return elf_x86_64_rtype_to_howto (abfd
,
304 x86_64_reloc_map
[i
].elf_reloc_val
);
309 static reloc_howto_type
*
310 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
315 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
317 /* Get x32 R_X86_64_32. */
318 reloc_howto_type
*reloc
319 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
320 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
324 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
325 if (x86_64_elf_howto_table
[i
].name
!= NULL
326 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
327 return &x86_64_elf_howto_table
[i
];
332 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
335 elf_x86_64_info_to_howto (bfd
*abfd
, arelent
*cache_ptr
,
336 Elf_Internal_Rela
*dst
)
340 r_type
= ELF32_R_TYPE (dst
->r_info
);
341 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
342 if (cache_ptr
->howto
== NULL
)
344 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
|| cache_ptr
->howto
->type
== R_X86_64_NONE
);
348 /* Support for core dump NOTE sections. */
350 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
355 switch (note
->descsz
)
360 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
362 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
365 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
373 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
375 elf_tdata (abfd
)->core
->signal
376 = bfd_get_16 (abfd
, note
->descdata
+ 12);
379 elf_tdata (abfd
)->core
->lwpid
380 = bfd_get_32 (abfd
, note
->descdata
+ 32);
389 /* Make a ".reg/999" section. */
390 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
391 size
, note
->descpos
+ offset
);
395 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
397 switch (note
->descsz
)
402 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
403 elf_tdata (abfd
)->core
->pid
404 = bfd_get_32 (abfd
, note
->descdata
+ 12);
405 elf_tdata (abfd
)->core
->program
406 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
407 elf_tdata (abfd
)->core
->command
408 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
411 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
412 elf_tdata (abfd
)->core
->pid
413 = bfd_get_32 (abfd
, note
->descdata
+ 24);
414 elf_tdata (abfd
)->core
->program
415 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
416 elf_tdata (abfd
)->core
->command
417 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
420 /* Note that for some reason, a spurious space is tacked
421 onto the end of the args in some (at least one anyway)
422 implementations, so strip it off if it exists. */
425 char *command
= elf_tdata (abfd
)->core
->command
;
426 int n
= strlen (command
);
428 if (0 < n
&& command
[n
- 1] == ' ')
429 command
[n
- 1] = '\0';
436 # if GCC_VERSION >= 8000
437 # pragma GCC diagnostic push
438 # pragma GCC diagnostic ignored "-Wstringop-truncation"
441 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
444 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
446 const char *fname
, *psargs
;
457 va_start (ap
, note_type
);
458 fname
= va_arg (ap
, const char *);
459 psargs
= va_arg (ap
, const char *);
462 if (bed
->s
->elfclass
== ELFCLASS32
)
465 memset (&data
, 0, sizeof (data
));
466 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
467 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
468 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
469 &data
, sizeof (data
));
474 memset (&data
, 0, sizeof (data
));
475 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
476 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
477 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
478 &data
, sizeof (data
));
483 va_start (ap
, note_type
);
484 pid
= va_arg (ap
, long);
485 cursig
= va_arg (ap
, int);
486 gregs
= va_arg (ap
, const void *);
489 if (bed
->s
->elfclass
== ELFCLASS32
)
491 if (bed
->elf_machine_code
== EM_X86_64
)
493 prstatusx32_t prstat
;
494 memset (&prstat
, 0, sizeof (prstat
));
496 prstat
.pr_cursig
= cursig
;
497 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
498 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
499 &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
));
515 memset (&prstat
, 0, sizeof (prstat
));
517 prstat
.pr_cursig
= cursig
;
518 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
519 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
520 &prstat
, sizeof (prstat
));
525 # if GCC_VERSION >= 8000
526 # pragma GCC diagnostic pop
530 /* Functions for the x86-64 ELF linker. */
532 /* The size in bytes of an entry in the global offset table. */
534 #define GOT_ENTRY_SIZE 8
536 /* The size in bytes of an entry in the lazy procedure linkage table. */
538 #define LAZY_PLT_ENTRY_SIZE 16
540 /* The size in bytes of an entry in the non-lazy procedure linkage
543 #define NON_LAZY_PLT_ENTRY_SIZE 8
545 /* The first entry in a lazy procedure linkage table looks like this.
546 See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this
549 static const bfd_byte elf_x86_64_lazy_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
551 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
552 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
553 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
556 /* Subsequent entries in a lazy procedure linkage table look like this. */
558 static const bfd_byte elf_x86_64_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
560 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
561 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
562 0x68, /* pushq immediate */
563 0, 0, 0, 0, /* replaced with index into relocation table. */
564 0xe9, /* jmp relative */
565 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
568 /* The first entry in a lazy procedure linkage table with BND prefix
571 static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
573 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
574 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
575 0x0f, 0x1f, 0 /* nopl (%rax) */
578 /* Subsequent entries for branches with BND prefx in a lazy procedure
579 linkage table look like this. */
581 static const bfd_byte elf_x86_64_lazy_bnd_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
583 0x68, 0, 0, 0, 0, /* pushq immediate */
584 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
585 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
588 /* The first entry in the IBT-enabled lazy procedure linkage table is the
589 the same as the lazy PLT with BND prefix so that bound registers are
590 preserved when control is passed to dynamic linker. Subsequent
591 entries for a IBT-enabled lazy procedure linkage table look like
594 static const bfd_byte elf_x86_64_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
596 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
597 0x68, 0, 0, 0, 0, /* pushq immediate */
598 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
602 /* The first entry in the x32 IBT-enabled lazy procedure linkage table
603 is the same as the normal lazy PLT. Subsequent entries for an
604 x32 IBT-enabled lazy procedure linkage table look like this. */
606 static const bfd_byte elf_x32_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
608 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
609 0x68, 0, 0, 0, 0, /* pushq immediate */
610 0xe9, 0, 0, 0, 0, /* jmpq relative */
611 0x66, 0x90 /* xchg %ax,%ax */
614 /* Entries in the non-lazey procedure linkage table look like this. */
616 static const bfd_byte elf_x86_64_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
618 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
619 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
620 0x66, 0x90 /* xchg %ax,%ax */
623 /* Entries for branches with BND prefix in the non-lazey procedure
624 linkage table look like this. */
626 static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
628 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
629 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
633 /* Entries for branches with IBT-enabled in the non-lazey procedure
634 linkage table look like this. They have the same size as the lazy
637 static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
639 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
640 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
641 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
642 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */
645 /* Entries for branches with IBT-enabled in the x32 non-lazey procedure
646 linkage table look like this. They have the same size as the lazy
649 static const bfd_byte elf_x32_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
651 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
652 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
653 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
654 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
657 /* The TLSDESC entry in a lazy procedure linkage table. */
658 static const bfd_byte elf_x86_64_tlsdesc_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
660 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
661 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
662 0xff, 0x25, 16, 0, 0, 0 /* jmpq *GOT+TDG(%rip) */
665 /* .eh_frame covering the lazy .plt section. */
667 static const bfd_byte elf_x86_64_eh_frame_lazy_plt
[] =
669 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
670 0, 0, 0, 0, /* CIE ID */
672 'z', 'R', 0, /* Augmentation string */
673 1, /* Code alignment factor */
674 0x78, /* Data alignment factor */
675 16, /* Return address column */
676 1, /* Augmentation size */
677 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
678 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
679 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
680 DW_CFA_nop
, DW_CFA_nop
,
682 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
683 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
684 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
685 0, 0, 0, 0, /* .plt size goes here */
686 0, /* Augmentation size */
687 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
688 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
689 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
690 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
691 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
692 11, /* Block length */
693 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
694 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
695 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
696 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
697 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
700 /* .eh_frame covering the lazy BND .plt section. */
702 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt
[] =
704 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
705 0, 0, 0, 0, /* CIE ID */
707 'z', 'R', 0, /* Augmentation string */
708 1, /* Code alignment factor */
709 0x78, /* Data alignment factor */
710 16, /* Return address column */
711 1, /* Augmentation size */
712 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
713 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
714 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
715 DW_CFA_nop
, DW_CFA_nop
,
717 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
718 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
719 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
720 0, 0, 0, 0, /* .plt size goes here */
721 0, /* Augmentation size */
722 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
723 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
724 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
725 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
726 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
727 11, /* Block length */
728 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
729 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
730 DW_OP_lit15
, DW_OP_and
, DW_OP_lit5
, DW_OP_ge
,
731 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
732 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
735 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
737 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt
[] =
739 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
740 0, 0, 0, 0, /* CIE ID */
742 'z', 'R', 0, /* Augmentation string */
743 1, /* Code alignment factor */
744 0x78, /* Data alignment factor */
745 16, /* Return address column */
746 1, /* Augmentation size */
747 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
748 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
749 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
750 DW_CFA_nop
, DW_CFA_nop
,
752 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
753 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
754 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
755 0, 0, 0, 0, /* .plt size goes here */
756 0, /* Augmentation size */
757 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
758 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
759 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
760 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
761 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
762 11, /* Block length */
763 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
764 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
765 DW_OP_lit15
, DW_OP_and
, DW_OP_lit10
, DW_OP_ge
,
766 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
767 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
770 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
772 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt
[] =
774 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
775 0, 0, 0, 0, /* CIE ID */
777 'z', 'R', 0, /* Augmentation string */
778 1, /* Code alignment factor */
779 0x78, /* Data alignment factor */
780 16, /* Return address column */
781 1, /* Augmentation size */
782 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
783 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
784 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
785 DW_CFA_nop
, DW_CFA_nop
,
787 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
788 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
789 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
790 0, 0, 0, 0, /* .plt size goes here */
791 0, /* Augmentation size */
792 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
793 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
794 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
795 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
796 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
797 11, /* Block length */
798 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
799 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
800 DW_OP_lit15
, DW_OP_and
, DW_OP_lit9
, DW_OP_ge
,
801 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
802 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
805 /* .eh_frame covering the non-lazy .plt section. */
807 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt
[] =
809 #define PLT_GOT_FDE_LENGTH 20
810 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
811 0, 0, 0, 0, /* CIE ID */
813 'z', 'R', 0, /* Augmentation string */
814 1, /* Code alignment factor */
815 0x78, /* Data alignment factor */
816 16, /* Return address column */
817 1, /* Augmentation size */
818 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
819 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
820 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
821 DW_CFA_nop
, DW_CFA_nop
,
823 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
824 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
825 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
826 0, 0, 0, 0, /* non-lazy .plt size goes here */
827 0, /* Augmentation size */
828 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
,
829 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
832 /* These are the standard parameters. */
833 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt
=
835 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
836 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
837 elf_x86_64_lazy_plt_entry
, /* plt_entry */
838 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
839 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
840 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
841 6, /* plt_tlsdesc_got1_offset */
842 12, /* plt_tlsdesc_got2_offset */
843 10, /* plt_tlsdesc_got1_insn_end */
844 16, /* plt_tlsdesc_got2_insn_end */
845 2, /* plt0_got1_offset */
846 8, /* plt0_got2_offset */
847 12, /* plt0_got2_insn_end */
848 2, /* plt_got_offset */
849 7, /* plt_reloc_offset */
850 12, /* plt_plt_offset */
851 6, /* plt_got_insn_size */
852 LAZY_PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
853 6, /* plt_lazy_offset */
854 elf_x86_64_lazy_plt0_entry
, /* pic_plt0_entry */
855 elf_x86_64_lazy_plt_entry
, /* pic_plt_entry */
856 elf_x86_64_eh_frame_lazy_plt
, /* eh_frame_plt */
857 sizeof (elf_x86_64_eh_frame_lazy_plt
) /* eh_frame_plt_size */
860 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt
=
862 elf_x86_64_non_lazy_plt_entry
, /* plt_entry */
863 elf_x86_64_non_lazy_plt_entry
, /* pic_plt_entry */
864 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
865 2, /* plt_got_offset */
866 6, /* plt_got_insn_size */
867 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
868 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
871 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt
=
873 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
874 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
875 elf_x86_64_lazy_bnd_plt_entry
, /* plt_entry */
876 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
877 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
878 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
879 6, /* plt_tlsdesc_got1_offset */
880 12, /* plt_tlsdesc_got2_offset */
881 10, /* plt_tlsdesc_got1_insn_end */
882 16, /* plt_tlsdesc_got2_insn_end */
883 2, /* plt0_got1_offset */
884 1+8, /* plt0_got2_offset */
885 1+12, /* plt0_got2_insn_end */
886 1+2, /* plt_got_offset */
887 1, /* plt_reloc_offset */
888 7, /* plt_plt_offset */
889 1+6, /* plt_got_insn_size */
890 11, /* plt_plt_insn_end */
891 0, /* plt_lazy_offset */
892 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
893 elf_x86_64_lazy_bnd_plt_entry
, /* pic_plt_entry */
894 elf_x86_64_eh_frame_lazy_bnd_plt
, /* eh_frame_plt */
895 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt
) /* eh_frame_plt_size */
898 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt
=
900 elf_x86_64_non_lazy_bnd_plt_entry
, /* plt_entry */
901 elf_x86_64_non_lazy_bnd_plt_entry
, /* pic_plt_entry */
902 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
903 1+2, /* plt_got_offset */
904 1+6, /* plt_got_insn_size */
905 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
906 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
909 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt
=
911 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
912 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
913 elf_x86_64_lazy_ibt_plt_entry
, /* plt_entry */
914 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
915 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
916 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
917 6, /* plt_tlsdesc_got1_offset */
918 12, /* plt_tlsdesc_got2_offset */
919 10, /* plt_tlsdesc_got1_insn_end */
920 16, /* plt_tlsdesc_got2_insn_end */
921 2, /* plt0_got1_offset */
922 1+8, /* plt0_got2_offset */
923 1+12, /* plt0_got2_insn_end */
924 4+1+2, /* plt_got_offset */
925 4+1, /* plt_reloc_offset */
926 4+1+6, /* plt_plt_offset */
927 4+1+6, /* plt_got_insn_size */
928 4+1+5+5, /* plt_plt_insn_end */
929 0, /* plt_lazy_offset */
930 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
931 elf_x86_64_lazy_ibt_plt_entry
, /* pic_plt_entry */
932 elf_x86_64_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
933 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
936 static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt
=
938 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
939 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
940 elf_x32_lazy_ibt_plt_entry
, /* plt_entry */
941 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
942 elf_x86_64_tlsdesc_plt_entry
, /* plt_tlsdesc_entry */
943 LAZY_PLT_ENTRY_SIZE
, /* plt_tlsdesc_entry_size */
944 6, /* plt_tlsdesc_got1_offset */
945 12, /* plt_tlsdesc_got2_offset */
946 10, /* plt_tlsdesc_got1_insn_end */
947 16, /* plt_tlsdesc_got2_insn_end */
948 2, /* plt0_got1_offset */
949 8, /* plt0_got2_offset */
950 12, /* plt0_got2_insn_end */
951 4+2, /* plt_got_offset */
952 4+1, /* plt_reloc_offset */
953 4+6, /* plt_plt_offset */
954 4+6, /* plt_got_insn_size */
955 4+5+5, /* plt_plt_insn_end */
956 0, /* plt_lazy_offset */
957 elf_x86_64_lazy_plt0_entry
, /* pic_plt0_entry */
958 elf_x32_lazy_ibt_plt_entry
, /* pic_plt_entry */
959 elf_x32_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
960 sizeof (elf_x32_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
963 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt
=
965 elf_x86_64_non_lazy_ibt_plt_entry
, /* plt_entry */
966 elf_x86_64_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
967 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
968 4+1+2, /* plt_got_offset */
969 4+1+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 */
974 static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt
=
976 elf_x32_non_lazy_ibt_plt_entry
, /* plt_entry */
977 elf_x32_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
978 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
979 4+2, /* plt_got_offset */
980 4+6, /* plt_got_insn_size */
981 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
982 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
987 elf64_x86_64_elf_object_p (bfd
*abfd
)
989 /* Set the right machine number for an x86-64 elf64 file. */
990 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
995 elf32_x86_64_elf_object_p (bfd
*abfd
)
997 /* Set the right machine number for an x86-64 elf32 file. */
998 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1002 /* Return TRUE if the TLS access code sequence support transition
1006 elf_x86_64_check_tls_transition (bfd
*abfd
,
1007 struct bfd_link_info
*info
,
1010 Elf_Internal_Shdr
*symtab_hdr
,
1011 struct elf_link_hash_entry
**sym_hashes
,
1012 unsigned int r_type
,
1013 const Elf_Internal_Rela
*rel
,
1014 const Elf_Internal_Rela
*relend
)
1017 unsigned long r_symndx
;
1018 bool largepic
= false;
1019 struct elf_link_hash_entry
*h
;
1021 struct elf_x86_link_hash_table
*htab
;
1025 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1026 offset
= rel
->r_offset
;
1029 case R_X86_64_TLSGD
:
1030 case R_X86_64_TLSLD
:
1031 if ((rel
+ 1) >= relend
)
1034 if (r_type
== R_X86_64_TLSGD
)
1036 /* Check transition from GD access model. For 64bit, only
1037 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1038 .word 0x6666; rex64; call __tls_get_addr@PLT
1040 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1042 call *__tls_get_addr@GOTPCREL(%rip)
1043 which may be converted to
1044 addr32 call __tls_get_addr
1045 can transit to different access model. For 32bit, only
1046 leaq foo@tlsgd(%rip), %rdi
1047 .word 0x6666; rex64; call __tls_get_addr@PLT
1049 leaq foo@tlsgd(%rip), %rdi
1051 call *__tls_get_addr@GOTPCREL(%rip)
1052 which may be converted to
1053 addr32 call __tls_get_addr
1054 can transit to different access model. For largepic,
1056 leaq foo@tlsgd(%rip), %rdi
1057 movabsq $__tls_get_addr@pltoff, %rax
1061 leaq foo@tlsgd(%rip), %rdi
1062 movabsq $__tls_get_addr@pltoff, %rax
1066 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1068 if ((offset
+ 12) > sec
->size
)
1071 call
= contents
+ offset
+ 4;
1073 || !((call
[1] == 0x48
1081 && call
[3] == 0xe8)))
1083 if (!ABI_64_P (abfd
)
1084 || (offset
+ 19) > sec
->size
1086 || memcmp (call
- 7, leaq
+ 1, 3) != 0
1087 || memcmp (call
, "\x48\xb8", 2) != 0
1091 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1092 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1096 else if (ABI_64_P (abfd
))
1099 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1105 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1108 indirect_call
= call
[2] == 0xff;
1112 /* Check transition from LD access model. Only
1113 leaq foo@tlsld(%rip), %rdi;
1114 call __tls_get_addr@PLT
1116 leaq foo@tlsld(%rip), %rdi;
1117 call *__tls_get_addr@GOTPCREL(%rip)
1118 which may be converted to
1119 addr32 call __tls_get_addr
1120 can transit to different access model. For largepic
1122 leaq foo@tlsld(%rip), %rdi
1123 movabsq $__tls_get_addr@pltoff, %rax
1127 leaq foo@tlsld(%rip), %rdi
1128 movabsq $__tls_get_addr@pltoff, %rax
1132 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1134 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1137 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1140 call
= contents
+ offset
+ 4;
1141 if (!(call
[0] == 0xe8
1142 || (call
[0] == 0xff && call
[1] == 0x15)
1143 || (call
[0] == 0x67 && call
[1] == 0xe8)))
1145 if (!ABI_64_P (abfd
)
1146 || (offset
+ 19) > sec
->size
1147 || memcmp (call
, "\x48\xb8", 2) != 0
1151 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1152 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1156 indirect_call
= call
[0] == 0xff;
1159 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1160 if (r_symndx
< symtab_hdr
->sh_info
)
1163 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1165 || !((struct elf_x86_link_hash_entry
*) h
)->tls_get_addr
)
1169 r_type
= (ELF32_R_TYPE (rel
[1].r_info
)
1170 & ~R_X86_64_converted_reloc_bit
);
1172 return r_type
== R_X86_64_PLTOFF64
;
1173 else if (indirect_call
)
1174 return r_type
== R_X86_64_GOTPCRELX
;
1176 return (r_type
== R_X86_64_PC32
|| r_type
== R_X86_64_PLT32
);
1179 case R_X86_64_GOTTPOFF
:
1180 /* Check transition from IE access model:
1181 mov foo@gottpoff(%rip), %reg
1182 add foo@gottpoff(%rip), %reg
1185 /* Check REX prefix first. */
1186 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1188 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1189 if (val
!= 0x48 && val
!= 0x4c)
1191 /* X32 may have 0x44 REX prefix or no REX prefix. */
1192 if (ABI_64_P (abfd
))
1198 /* X32 may not have any REX prefix. */
1199 if (ABI_64_P (abfd
))
1201 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1205 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1206 if (val
!= 0x8b && val
!= 0x03)
1209 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1210 return (val
& 0xc7) == 5;
1212 case R_X86_64_GOTPC32_TLSDESC
:
1213 /* Check transition from GDesc access model:
1214 leaq x@tlsdesc(%rip), %rax <--- LP64 mode.
1215 rex leal x@tlsdesc(%rip), %eax <--- X32 mode.
1217 Make sure it's a leaq adding rip to a 32-bit offset
1218 into any register, although it's probably almost always
1221 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1224 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1226 if (val
!= 0x48 && (ABI_64_P (abfd
) || val
!= 0x40))
1229 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1232 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1233 return (val
& 0xc7) == 0x05;
1235 case R_X86_64_TLSDESC_CALL
:
1236 /* Check transition from GDesc access model:
1237 call *x@tlsdesc(%rax) <--- LP64 mode.
1238 call *x@tlsdesc(%eax) <--- X32 mode.
1240 if (offset
+ 2 <= sec
->size
)
1242 unsigned int prefix
;
1243 call
= contents
+ offset
;
1245 if (!ABI_64_P (abfd
))
1247 /* Check for call *x@tlsdesc(%eax). */
1248 if (call
[0] == 0x67)
1251 if (offset
+ 3 > sec
->size
)
1255 /* Make sure that it's a call *x@tlsdesc(%rax). */
1256 return call
[prefix
] == 0xff && call
[1 + prefix
] == 0x10;
1266 /* Return TRUE if the TLS access transition is OK or no transition
1267 will be performed. Update R_TYPE if there is a transition. */
1270 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1271 asection
*sec
, bfd_byte
*contents
,
1272 Elf_Internal_Shdr
*symtab_hdr
,
1273 struct elf_link_hash_entry
**sym_hashes
,
1274 unsigned int *r_type
, int tls_type
,
1275 const Elf_Internal_Rela
*rel
,
1276 const Elf_Internal_Rela
*relend
,
1277 struct elf_link_hash_entry
*h
,
1278 unsigned long r_symndx
,
1279 bool from_relocate_section
)
1281 unsigned int from_type
= *r_type
;
1282 unsigned int to_type
= from_type
;
1285 /* Skip TLS transition for functions. */
1287 && (h
->type
== STT_FUNC
1288 || h
->type
== STT_GNU_IFUNC
))
1293 case R_X86_64_TLSGD
:
1294 case R_X86_64_GOTPC32_TLSDESC
:
1295 case R_X86_64_TLSDESC_CALL
:
1296 case R_X86_64_GOTTPOFF
:
1297 if (bfd_link_executable (info
))
1300 to_type
= R_X86_64_TPOFF32
;
1302 to_type
= R_X86_64_GOTTPOFF
;
1305 /* When we are called from elf_x86_64_relocate_section, there may
1306 be additional transitions based on TLS_TYPE. */
1307 if (from_relocate_section
)
1309 unsigned int new_to_type
= to_type
;
1311 if (TLS_TRANSITION_IE_TO_LE_P (info
, h
, tls_type
))
1312 new_to_type
= R_X86_64_TPOFF32
;
1314 if (to_type
== R_X86_64_TLSGD
1315 || to_type
== R_X86_64_GOTPC32_TLSDESC
1316 || to_type
== R_X86_64_TLSDESC_CALL
)
1318 if (tls_type
== GOT_TLS_IE
)
1319 new_to_type
= R_X86_64_GOTTPOFF
;
1322 /* We checked the transition before when we were called from
1323 elf_x86_64_check_relocs. We only want to check the new
1324 transition which hasn't been checked before. */
1325 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1326 to_type
= new_to_type
;
1331 case R_X86_64_TLSLD
:
1332 if (bfd_link_executable (info
))
1333 to_type
= R_X86_64_TPOFF32
;
1340 /* Return TRUE if there is no transition. */
1341 if (from_type
== to_type
)
1344 /* Check if the transition can be performed. */
1346 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1347 symtab_hdr
, sym_hashes
,
1348 from_type
, rel
, relend
))
1350 reloc_howto_type
*from
, *to
;
1353 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1354 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1356 if (from
== NULL
|| to
== NULL
)
1360 name
= h
->root
.root
.string
;
1363 struct elf_x86_link_hash_table
*htab
;
1365 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1370 Elf_Internal_Sym
*isym
;
1372 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
1374 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1379 /* xgettext:c-format */
1380 (_("%pB: TLS transition from %s to %s against `%s' at %#" PRIx64
1381 " in section `%pA' failed"),
1382 abfd
, from
->name
, to
->name
, name
, (uint64_t) rel
->r_offset
, sec
);
1383 bfd_set_error (bfd_error_bad_value
);
1391 /* Rename some of the generic section flags to better document how they
1393 #define check_relocs_failed sec_flg0
1396 elf_x86_64_need_pic (struct bfd_link_info
*info
,
1397 bfd
*input_bfd
, asection
*sec
,
1398 struct elf_link_hash_entry
*h
,
1399 Elf_Internal_Shdr
*symtab_hdr
,
1400 Elf_Internal_Sym
*isym
,
1401 reloc_howto_type
*howto
)
1404 const char *und
= "";
1405 const char *pic
= "";
1411 name
= h
->root
.root
.string
;
1412 switch (ELF_ST_VISIBILITY (h
->other
))
1415 v
= _("hidden symbol ");
1418 v
= _("internal symbol ");
1421 v
= _("protected symbol ");
1424 if (((struct elf_x86_link_hash_entry
*) h
)->def_protected
)
1425 v
= _("protected symbol ");
1432 if (!SYMBOL_DEFINED_NON_SHARED_P (h
) && !h
->def_dynamic
)
1433 und
= _("undefined ");
1437 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, isym
, NULL
);
1441 if (bfd_link_dll (info
))
1443 object
= _("a shared object");
1445 pic
= _("; recompile with -fPIC");
1449 if (bfd_link_pie (info
))
1450 object
= _("a PIE object");
1452 object
= _("a PDE object");
1454 pic
= _("; recompile with -fPIE");
1457 /* xgettext:c-format */
1458 _bfd_error_handler (_("%pB: relocation %s against %s%s`%s' can "
1459 "not be used when making %s%s"),
1460 input_bfd
, howto
->name
, und
, v
, name
,
1462 bfd_set_error (bfd_error_bad_value
);
1463 sec
->check_relocs_failed
= 1;
1467 /* With the local symbol, foo, we convert
1468 mov foo@GOTPCREL(%rip), %reg
1472 call/jmp *foo@GOTPCREL(%rip)
1474 nop call foo/jmp foo nop
1475 When PIC is false, convert
1476 test %reg, foo@GOTPCREL(%rip)
1480 binop foo@GOTPCREL(%rip), %reg
1483 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1487 elf_x86_64_convert_load_reloc (bfd
*abfd
,
1489 unsigned int *r_type_p
,
1490 Elf_Internal_Rela
*irel
,
1491 struct elf_link_hash_entry
*h
,
1493 struct bfd_link_info
*link_info
)
1495 struct elf_x86_link_hash_table
*htab
;
1503 bfd_signed_vma raddend
;
1504 unsigned int opcode
;
1506 unsigned int r_type
= *r_type_p
;
1507 unsigned int r_symndx
;
1508 bfd_vma roff
= irel
->r_offset
;
1509 bfd_vma abs_relocation
;
1511 if (roff
< (r_type
== R_X86_64_REX_GOTPCRELX
? 3 : 2))
1514 raddend
= irel
->r_addend
;
1515 /* Addend for 32-bit PC-relative relocation must be -4. */
1519 htab
= elf_x86_hash_table (link_info
, X86_64_ELF_DATA
);
1520 is_pic
= bfd_link_pic (link_info
);
1522 relocx
= (r_type
== R_X86_64_GOTPCRELX
1523 || r_type
== R_X86_64_REX_GOTPCRELX
);
1525 /* TRUE if --no-relax is used. */
1526 no_overflow
= link_info
->disable_target_specific_optimizations
> 1;
1528 r_symndx
= htab
->r_sym (irel
->r_info
);
1530 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1532 /* Convert mov to lea since it has been done for a while. */
1535 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
1536 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
1537 test, xor instructions. */
1542 /* We convert only to R_X86_64_PC32:
1544 2. R_X86_64_GOTPCREL since we can't modify REX byte.
1545 3. no_overflow is true.
1548 to_reloc_pc32
= (opcode
== 0xff
1556 /* Get the symbol referred to by the reloc. */
1559 Elf_Internal_Sym
*isym
1560 = bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
, abfd
, r_symndx
);
1562 /* Skip relocation against undefined symbols. */
1563 if (isym
->st_shndx
== SHN_UNDEF
)
1567 if (isym
->st_shndx
== SHN_ABS
)
1569 tsec
= bfd_abs_section_ptr
;
1571 abs_relocation
= isym
->st_value
;
1573 else if (isym
->st_shndx
== SHN_COMMON
)
1574 tsec
= bfd_com_section_ptr
;
1575 else if (isym
->st_shndx
== SHN_X86_64_LCOMMON
)
1576 tsec
= &_bfd_elf_large_com_section
;
1578 tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1582 /* Undefined weak symbol is only bound locally in executable
1583 and its reference is resolved as 0 without relocation
1584 overflow. We can only perform this optimization for
1585 GOTPCRELX relocations since we need to modify REX byte.
1586 It is OK convert mov with R_X86_64_GOTPCREL to
1588 struct elf_x86_link_hash_entry
*eh
= elf_x86_hash_entry (h
);
1590 abs_symbol
= ABS_SYMBOL_P (h
);
1591 abs_relocation
= h
->root
.u
.def
.value
;
1593 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1594 local_ref
= SYMBOL_REFERENCES_LOCAL_P (link_info
, h
);
1595 if ((relocx
|| opcode
== 0x8b)
1596 && (h
->root
.type
== bfd_link_hash_undefweak
1602 /* Skip for branch instructions since R_X86_64_PC32
1609 /* For non-branch instructions, we can convert to
1610 R_X86_64_32/R_X86_64_32S since we know if there
1612 to_reloc_pc32
= false;
1615 /* Since we don't know the current PC when PIC is true,
1616 we can't convert to R_X86_64_PC32. */
1617 if (to_reloc_pc32
&& is_pic
)
1622 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
1623 ld.so may use its link-time address. */
1624 else if (h
->start_stop
1627 || h
->root
.type
== bfd_link_hash_defined
1628 || h
->root
.type
== bfd_link_hash_defweak
)
1629 && h
!= htab
->elf
.hdynamic
1632 /* bfd_link_hash_new or bfd_link_hash_undefined is
1633 set by an assignment in a linker script in
1634 bfd_elf_record_link_assignment. start_stop is set
1635 on __start_SECNAME/__stop_SECNAME which mark section
1640 && (h
->root
.type
== bfd_link_hash_new
1641 || h
->root
.type
== bfd_link_hash_undefined
1642 || ((h
->root
.type
== bfd_link_hash_defined
1643 || h
->root
.type
== bfd_link_hash_defweak
)
1644 && h
->root
.u
.def
.section
== bfd_und_section_ptr
))))
1646 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
1651 tsec
= h
->root
.u
.def
.section
;
1657 /* Don't convert GOTPCREL relocation against large section. */
1658 if (elf_section_data (tsec
) != NULL
1659 && (elf_section_flags (tsec
) & SHF_X86_64_LARGE
) != 0)
1662 /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */
1669 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
1674 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
1676 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1679 /* Convert to "jmp foo nop". */
1682 nop_offset
= irel
->r_offset
+ 3;
1683 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1684 irel
->r_offset
-= 1;
1685 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1689 struct elf_x86_link_hash_entry
*eh
1690 = (struct elf_x86_link_hash_entry
*) h
;
1692 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1695 /* To support TLS optimization, always use addr32 prefix for
1696 "call *__tls_get_addr@GOTPCREL(%rip)". */
1697 if (eh
&& eh
->tls_get_addr
)
1700 nop_offset
= irel
->r_offset
- 2;
1704 nop
= htab
->params
->call_nop_byte
;
1705 if (htab
->params
->call_nop_as_suffix
)
1707 nop_offset
= irel
->r_offset
+ 3;
1708 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1709 irel
->r_offset
-= 1;
1710 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1713 nop_offset
= irel
->r_offset
- 2;
1716 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1717 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1718 r_type
= R_X86_64_PC32
;
1723 unsigned int rex_mask
= REX_R
;
1725 if (r_type
== R_X86_64_REX_GOTPCRELX
)
1726 rex
= bfd_get_8 (abfd
, contents
+ roff
- 3);
1732 if (abs_symbol
&& local_ref
&& relocx
)
1733 to_reloc_pc32
= false;
1737 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1738 "lea foo(%rip), %reg". */
1740 r_type
= R_X86_64_PC32
;
1744 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1745 "mov $foo, %reg". */
1747 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1748 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1749 if ((rex
& REX_W
) != 0
1750 && ABI_64_P (link_info
->output_bfd
))
1752 /* Keep the REX_W bit in REX byte for LP64. */
1753 r_type
= R_X86_64_32S
;
1754 goto rewrite_modrm_rex
;
1758 /* If the REX_W bit in REX byte isn't needed,
1759 use R_X86_64_32 and clear the W bit to avoid
1760 sign-extend imm32 to imm64. */
1761 r_type
= R_X86_64_32
;
1762 /* Clear the W bit in REX byte. */
1764 goto rewrite_modrm_rex
;
1770 /* R_X86_64_PC32 isn't supported. */
1774 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1777 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
1778 "test $foo, %reg". */
1779 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1784 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
1785 "binop $foo, %reg". */
1786 modrm
= 0xc0 | (modrm
& 0x38) >> 3 | (opcode
& 0x3c);
1790 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
1791 overflow when sign-extending imm32 to imm64. */
1792 r_type
= (rex
& REX_W
) != 0 ? R_X86_64_32S
: R_X86_64_32
;
1797 /* Check if R_X86_64_32S/R_X86_64_32 fits. */
1798 if (r_type
== R_X86_64_32S
)
1800 if ((abs_relocation
+ 0x80000000) > 0xffffffff)
1805 if (abs_relocation
> 0xffffffff)
1810 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1814 /* Move the R bit to the B bit in REX byte. */
1815 rex
= (rex
& ~rex_mask
) | (rex
& REX_R
) >> 2;
1816 bfd_put_8 (abfd
, rex
, contents
+ roff
- 3);
1819 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
1823 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1827 irel
->r_info
= htab
->r_info (r_symndx
,
1828 r_type
| R_X86_64_converted_reloc_bit
);
1835 /* Look through the relocs for a section during the first phase, and
1836 calculate needed space in the global offset table, procedure
1837 linkage table, and dynamic reloc sections. */
1840 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1842 const Elf_Internal_Rela
*relocs
)
1844 struct elf_x86_link_hash_table
*htab
;
1845 Elf_Internal_Shdr
*symtab_hdr
;
1846 struct elf_link_hash_entry
**sym_hashes
;
1847 const Elf_Internal_Rela
*rel
;
1848 const Elf_Internal_Rela
*rel_end
;
1853 if (bfd_link_relocatable (info
))
1856 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1859 sec
->check_relocs_failed
= 1;
1863 BFD_ASSERT (is_x86_elf (abfd
, htab
));
1865 /* Get the section contents. */
1866 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1867 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1868 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1870 sec
->check_relocs_failed
= 1;
1874 symtab_hdr
= &elf_symtab_hdr (abfd
);
1875 sym_hashes
= elf_sym_hashes (abfd
);
1881 rel_end
= relocs
+ sec
->reloc_count
;
1882 for (rel
= relocs
; rel
< rel_end
; rel
++)
1884 unsigned int r_type
;
1885 unsigned int r_symndx
;
1886 struct elf_link_hash_entry
*h
;
1887 struct elf_x86_link_hash_entry
*eh
;
1888 Elf_Internal_Sym
*isym
;
1891 bool converted_reloc
;
1894 r_symndx
= htab
->r_sym (rel
->r_info
);
1895 r_type
= ELF32_R_TYPE (rel
->r_info
);
1897 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1899 /* xgettext:c-format */
1900 _bfd_error_handler (_("%pB: bad symbol index: %d"),
1905 if (r_symndx
< symtab_hdr
->sh_info
)
1907 /* A local symbol. */
1908 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
1913 /* Check relocation against local STT_GNU_IFUNC symbol. */
1914 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1916 h
= _bfd_elf_x86_get_local_sym_hash (htab
, abfd
, rel
,
1921 /* Fake a STT_GNU_IFUNC symbol. */
1922 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1924 h
->type
= STT_GNU_IFUNC
;
1927 h
->forced_local
= 1;
1928 h
->root
.type
= bfd_link_hash_defined
;
1936 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1937 while (h
->root
.type
== bfd_link_hash_indirect
1938 || h
->root
.type
== bfd_link_hash_warning
)
1939 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1942 /* Check invalid x32 relocations. */
1943 if (!ABI_64_P (abfd
))
1949 case R_X86_64_DTPOFF64
:
1950 case R_X86_64_TPOFF64
:
1952 case R_X86_64_GOTOFF64
:
1953 case R_X86_64_GOT64
:
1954 case R_X86_64_GOTPCREL64
:
1955 case R_X86_64_GOTPC64
:
1956 case R_X86_64_GOTPLT64
:
1957 case R_X86_64_PLTOFF64
:
1960 name
= h
->root
.root
.string
;
1962 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1965 /* xgettext:c-format */
1966 (_("%pB: relocation %s against symbol `%s' isn't "
1967 "supported in x32 mode"), abfd
,
1968 x86_64_elf_howto_table
[r_type
].name
, name
);
1969 bfd_set_error (bfd_error_bad_value
);
1977 /* It is referenced by a non-shared object. */
1981 converted_reloc
= false;
1982 if ((r_type
== R_X86_64_GOTPCREL
1983 || r_type
== R_X86_64_GOTPCRELX
1984 || r_type
== R_X86_64_REX_GOTPCRELX
)
1985 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1987 Elf_Internal_Rela
*irel
= (Elf_Internal_Rela
*) rel
;
1988 if (!elf_x86_64_convert_load_reloc (abfd
, contents
, &r_type
,
1989 irel
, h
, &converted_reloc
,
1993 if (converted_reloc
)
1997 if (!_bfd_elf_x86_valid_reloc_p (sec
, info
, htab
, rel
, h
, isym
,
1998 symtab_hdr
, &no_dynreloc
))
2001 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, contents
,
2002 symtab_hdr
, sym_hashes
,
2003 &r_type
, GOT_UNKNOWN
,
2004 rel
, rel_end
, h
, r_symndx
, false))
2007 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
2008 if (h
== htab
->elf
.hgot
)
2009 htab
->got_referenced
= true;
2011 eh
= (struct elf_x86_link_hash_entry
*) h
;
2014 case R_X86_64_TLSLD
:
2015 htab
->tls_ld_or_ldm_got
.refcount
= 1;
2018 case R_X86_64_TPOFF32
:
2019 if (!bfd_link_executable (info
) && ABI_64_P (abfd
))
2020 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
2021 &x86_64_elf_howto_table
[r_type
]);
2023 eh
->zero_undefweak
&= 0x2;
2026 case R_X86_64_GOTTPOFF
:
2027 if (!bfd_link_executable (info
))
2028 info
->flags
|= DF_STATIC_TLS
;
2031 case R_X86_64_GOT32
:
2032 case R_X86_64_GOTPCREL
:
2033 case R_X86_64_GOTPCRELX
:
2034 case R_X86_64_REX_GOTPCRELX
:
2035 case R_X86_64_TLSGD
:
2036 case R_X86_64_GOT64
:
2037 case R_X86_64_GOTPCREL64
:
2038 case R_X86_64_GOTPLT64
:
2039 case R_X86_64_GOTPC32_TLSDESC
:
2040 case R_X86_64_TLSDESC_CALL
:
2041 /* This symbol requires a global offset table entry. */
2043 int tls_type
, old_tls_type
;
2048 tls_type
= GOT_NORMAL
;
2051 if (ABS_SYMBOL_P (h
))
2054 else if (isym
->st_shndx
== SHN_ABS
)
2057 case R_X86_64_TLSGD
:
2058 tls_type
= GOT_TLS_GD
;
2060 case R_X86_64_GOTTPOFF
:
2061 tls_type
= GOT_TLS_IE
;
2063 case R_X86_64_GOTPC32_TLSDESC
:
2064 case R_X86_64_TLSDESC_CALL
:
2065 tls_type
= GOT_TLS_GDESC
;
2071 h
->got
.refcount
= 1;
2072 old_tls_type
= eh
->tls_type
;
2076 bfd_signed_vma
*local_got_refcounts
;
2078 /* This is a global offset table entry for a local symbol. */
2079 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2080 if (local_got_refcounts
== NULL
)
2084 size
= symtab_hdr
->sh_info
;
2085 size
*= sizeof (bfd_signed_vma
)
2086 + sizeof (bfd_vma
) + sizeof (char);
2087 local_got_refcounts
= ((bfd_signed_vma
*)
2088 bfd_zalloc (abfd
, size
));
2089 if (local_got_refcounts
== NULL
)
2091 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2092 elf_x86_local_tlsdesc_gotent (abfd
)
2093 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2094 elf_x86_local_got_tls_type (abfd
)
2095 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2097 local_got_refcounts
[r_symndx
] = 1;
2099 = elf_x86_local_got_tls_type (abfd
) [r_symndx
];
2102 /* If a TLS symbol is accessed using IE at least once,
2103 there is no point to use dynamic model for it. */
2104 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2105 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2106 || tls_type
!= GOT_TLS_IE
))
2108 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
2109 tls_type
= old_tls_type
;
2110 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2111 && GOT_TLS_GD_ANY_P (tls_type
))
2112 tls_type
|= old_tls_type
;
2116 name
= h
->root
.root
.string
;
2118 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
2121 /* xgettext:c-format */
2122 (_("%pB: '%s' accessed both as normal and"
2123 " thread local symbol"),
2125 bfd_set_error (bfd_error_bad_value
);
2130 if (old_tls_type
!= tls_type
)
2133 eh
->tls_type
= tls_type
;
2135 elf_x86_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2140 case R_X86_64_GOTOFF64
:
2141 case R_X86_64_GOTPC32
:
2142 case R_X86_64_GOTPC64
:
2145 eh
->zero_undefweak
&= 0x2;
2148 case R_X86_64_PLT32
:
2149 case R_X86_64_PLT32_BND
:
2150 /* This symbol requires a procedure linkage table entry. We
2151 actually build the entry in adjust_dynamic_symbol,
2152 because this might be a case of linking PIC code which is
2153 never referenced by a dynamic object, in which case we
2154 don't need to generate a procedure linkage table entry
2157 /* If this is a local symbol, we resolve it directly without
2158 creating a procedure linkage table entry. */
2162 eh
->zero_undefweak
&= 0x2;
2164 h
->plt
.refcount
= 1;
2167 case R_X86_64_PLTOFF64
:
2168 /* This tries to form the 'address' of a function relative
2169 to GOT. For global symbols we need a PLT entry. */
2173 h
->plt
.refcount
= 1;
2177 case R_X86_64_SIZE32
:
2178 case R_X86_64_SIZE64
:
2183 if (!ABI_64_P (abfd
))
2189 /* Check relocation overflow as these relocs may lead to
2190 run-time relocation overflow. Don't error out for
2191 sections we don't care about, such as debug sections or
2192 when relocation overflow check is disabled. */
2193 if (!htab
->params
->no_reloc_overflow_check
2195 && (bfd_link_pic (info
)
2196 || (bfd_link_executable (info
)
2200 && (sec
->flags
& SEC_READONLY
) == 0)))
2201 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
2202 &x86_64_elf_howto_table
[r_type
]);
2208 case R_X86_64_PC32_BND
:
2212 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2213 eh
->zero_undefweak
|= 0x2;
2214 /* We are called after all symbols have been resolved. Only
2215 relocation against STT_GNU_IFUNC symbol must go through
2218 && (bfd_link_executable (info
)
2219 || h
->type
== STT_GNU_IFUNC
))
2221 bool func_pointer_ref
= false;
2223 if (r_type
== R_X86_64_PC32
)
2225 /* Since something like ".long foo - ." may be used
2226 as pointer, make sure that PLT is used if foo is
2227 a function defined in a shared library. */
2228 if ((sec
->flags
& SEC_CODE
) == 0)
2230 h
->pointer_equality_needed
= 1;
2231 if (bfd_link_pie (info
)
2232 && h
->type
== STT_FUNC
2237 h
->plt
.refcount
= 1;
2241 else if (r_type
!= R_X86_64_PC32_BND
2242 && r_type
!= R_X86_64_PC64
)
2244 h
->pointer_equality_needed
= 1;
2245 /* At run-time, R_X86_64_64 can be resolved for both
2246 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2247 can only be resolved for x32. */
2248 if ((sec
->flags
& SEC_READONLY
) == 0
2249 && (r_type
== R_X86_64_64
2250 || (!ABI_64_P (abfd
)
2251 && (r_type
== R_X86_64_32
2252 || r_type
== R_X86_64_32S
))))
2253 func_pointer_ref
= true;
2256 if (!func_pointer_ref
)
2258 /* If this reloc is in a read-only section, we might
2259 need a copy reloc. We can't check reliably at this
2260 stage whether the section is read-only, as input
2261 sections have not yet been mapped to output sections.
2262 Tentatively set the flag for now, and correct in
2263 adjust_dynamic_symbol. */
2266 /* We may need a .plt entry if the symbol is a function
2267 defined in a shared lib or is a function referenced
2268 from the code or read-only section. */
2270 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2271 h
->plt
.refcount
= 1;
2278 && NEED_DYNAMIC_RELOCATION_P (info
, true, h
, sec
, r_type
,
2279 htab
->pointer_r_type
))
2281 struct elf_dyn_relocs
*p
;
2282 struct elf_dyn_relocs
**head
;
2284 /* We must copy these reloc types into the output file.
2285 Create a reloc section in dynobj and make room for
2289 sreloc
= _bfd_elf_make_dynamic_reloc_section
2290 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2291 abfd
, /*rela?*/ true);
2297 /* If this is a global symbol, we count the number of
2298 relocations we need for this symbol. */
2300 head
= &h
->dyn_relocs
;
2303 /* Track dynamic relocs needed for local syms too.
2304 We really need local syms available to do this
2309 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
2314 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2318 /* Beware of type punned pointers vs strict aliasing
2320 vpp
= &(elf_section_data (s
)->local_dynrel
);
2321 head
= (struct elf_dyn_relocs
**)vpp
;
2325 if (p
== NULL
|| p
->sec
!= sec
)
2327 size_t amt
= sizeof *p
;
2329 p
= ((struct elf_dyn_relocs
*)
2330 bfd_alloc (htab
->elf
.dynobj
, amt
));
2341 /* Count size relocation as PC-relative relocation. */
2342 if (X86_PCREL_TYPE_P (r_type
) || size_reloc
)
2347 /* This relocation describes the C++ object vtable hierarchy.
2348 Reconstruct it for later use during GC. */
2349 case R_X86_64_GNU_VTINHERIT
:
2350 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2354 /* This relocation describes which C++ vtable entries are actually
2355 used. Record for later use during GC. */
2356 case R_X86_64_GNU_VTENTRY
:
2357 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2366 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2368 if (!converted
&& !info
->keep_memory
)
2372 /* Cache the section contents for elf_link_input_bfd if any
2373 load is converted or --no-keep-memory isn't used. */
2374 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2378 /* Cache relocations if any load is converted. */
2379 if (elf_section_data (sec
)->relocs
!= relocs
&& converted
)
2380 elf_section_data (sec
)->relocs
= (Elf_Internal_Rela
*) relocs
;
2385 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2387 sec
->check_relocs_failed
= 1;
2391 /* Return the relocation value for @tpoff relocation
2392 if STT_TLS virtual address is ADDRESS. */
2395 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2397 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2398 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
2399 bfd_vma static_tls_size
;
2401 /* If tls_segment is NULL, we should have signalled an error already. */
2402 if (htab
->tls_sec
== NULL
)
2405 /* Consider special static TLS alignment requirements. */
2406 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
2407 return address
- static_tls_size
- htab
->tls_sec
->vma
;
2410 /* Relocate an x86_64 ELF section. */
2413 elf_x86_64_relocate_section (bfd
*output_bfd
,
2414 struct bfd_link_info
*info
,
2416 asection
*input_section
,
2418 Elf_Internal_Rela
*relocs
,
2419 Elf_Internal_Sym
*local_syms
,
2420 asection
**local_sections
)
2422 struct elf_x86_link_hash_table
*htab
;
2423 Elf_Internal_Shdr
*symtab_hdr
;
2424 struct elf_link_hash_entry
**sym_hashes
;
2425 bfd_vma
*local_got_offsets
;
2426 bfd_vma
*local_tlsdesc_gotents
;
2427 Elf_Internal_Rela
*rel
;
2428 Elf_Internal_Rela
*wrel
;
2429 Elf_Internal_Rela
*relend
;
2430 unsigned int plt_entry_size
;
2433 /* Skip if check_relocs failed. */
2434 if (input_section
->check_relocs_failed
)
2437 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
2441 if (!is_x86_elf (input_bfd
, htab
))
2443 bfd_set_error (bfd_error_wrong_format
);
2447 plt_entry_size
= htab
->plt
.plt_entry_size
;
2448 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2449 sym_hashes
= elf_sym_hashes (input_bfd
);
2450 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2451 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
2453 _bfd_x86_elf_set_tls_module_base (info
);
2456 rel
= wrel
= relocs
;
2457 relend
= relocs
+ input_section
->reloc_count
;
2458 for (; rel
< relend
; wrel
++, rel
++)
2460 unsigned int r_type
, r_type_tls
;
2461 reloc_howto_type
*howto
;
2462 unsigned long r_symndx
;
2463 struct elf_link_hash_entry
*h
;
2464 struct elf_x86_link_hash_entry
*eh
;
2465 Elf_Internal_Sym
*sym
;
2467 bfd_vma off
, offplt
, plt_offset
;
2469 bool unresolved_reloc
;
2470 bfd_reloc_status_type r
;
2472 asection
*base_got
, *resolved_plt
;
2474 bool resolved_to_zero
;
2475 bool relative_reloc
;
2476 bool converted_reloc
;
2477 bool need_copy_reloc_in_pie
;
2478 bool no_copyreloc_p
;
2480 r_type
= ELF32_R_TYPE (rel
->r_info
);
2481 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
2482 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
2489 r_symndx
= htab
->r_sym (rel
->r_info
);
2490 converted_reloc
= (r_type
& R_X86_64_converted_reloc_bit
) != 0;
2491 if (converted_reloc
)
2493 r_type
&= ~R_X86_64_converted_reloc_bit
;
2494 rel
->r_info
= htab
->r_info (r_symndx
, r_type
);
2497 howto
= elf_x86_64_rtype_to_howto (input_bfd
, r_type
);
2499 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
2504 unresolved_reloc
= false;
2505 if (r_symndx
< symtab_hdr
->sh_info
)
2507 sym
= local_syms
+ r_symndx
;
2508 sec
= local_sections
[r_symndx
];
2510 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
2512 st_size
= sym
->st_size
;
2514 /* Relocate against local STT_GNU_IFUNC symbol. */
2515 if (!bfd_link_relocatable (info
)
2516 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2518 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
,
2523 /* Set STT_GNU_IFUNC symbol value. */
2524 h
->root
.u
.def
.value
= sym
->st_value
;
2525 h
->root
.u
.def
.section
= sec
;
2530 bool warned ATTRIBUTE_UNUSED
;
2531 bool ignored ATTRIBUTE_UNUSED
;
2533 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2534 r_symndx
, symtab_hdr
, sym_hashes
,
2536 unresolved_reloc
, warned
, ignored
);
2540 if (sec
!= NULL
&& discarded_section (sec
))
2542 _bfd_clear_contents (howto
, input_bfd
, input_section
,
2543 contents
, rel
->r_offset
);
2544 wrel
->r_offset
= rel
->r_offset
;
2548 /* For ld -r, remove relocations in debug sections against
2549 sections defined in discarded sections. Not done for
2550 eh_frame editing code expects to be present. */
2551 if (bfd_link_relocatable (info
)
2552 && (input_section
->flags
& SEC_DEBUGGING
))
2558 if (bfd_link_relocatable (info
))
2565 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
2567 if (r_type
== R_X86_64_64
)
2569 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
2570 zero-extend it to 64bit if addend is zero. */
2571 r_type
= R_X86_64_32
;
2572 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2574 else if (r_type
== R_X86_64_SIZE64
)
2576 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
2577 zero-extend it to 64bit if addend is zero. */
2578 r_type
= R_X86_64_SIZE32
;
2579 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2583 eh
= (struct elf_x86_link_hash_entry
*) h
;
2585 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2586 it here if it is defined in a non-shared object. */
2588 && h
->type
== STT_GNU_IFUNC
2594 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2596 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2597 STT_GNU_IFUNC symbol as STT_FUNC. */
2598 if (elf_section_type (input_section
) == SHT_NOTE
)
2600 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2601 sections because such sections are not SEC_ALLOC and
2602 thus ld.so will not process them. */
2603 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2613 case R_X86_64_GOTPCREL
:
2614 case R_X86_64_GOTPCRELX
:
2615 case R_X86_64_REX_GOTPCRELX
:
2616 case R_X86_64_GOTPCREL64
:
2617 base_got
= htab
->elf
.sgot
;
2618 off
= h
->got
.offset
;
2620 if (base_got
== NULL
)
2623 if (off
== (bfd_vma
) -1)
2625 /* We can't use h->got.offset here to save state, or
2626 even just remember the offset, as finish_dynamic_symbol
2627 would use that as offset into .got. */
2629 if (h
->plt
.offset
== (bfd_vma
) -1)
2632 if (htab
->elf
.splt
!= NULL
)
2634 plt_index
= (h
->plt
.offset
/ plt_entry_size
2635 - htab
->plt
.has_plt0
);
2636 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2637 base_got
= htab
->elf
.sgotplt
;
2641 plt_index
= h
->plt
.offset
/ plt_entry_size
;
2642 off
= plt_index
* GOT_ENTRY_SIZE
;
2643 base_got
= htab
->elf
.igotplt
;
2646 if (h
->dynindx
== -1
2650 /* This references the local defitionion. We must
2651 initialize this entry in the global offset table.
2652 Since the offset must always be a multiple of 8,
2653 we use the least significant bit to record
2654 whether we have initialized it already.
2656 When doing a dynamic link, we create a .rela.got
2657 relocation entry to initialize the value. This
2658 is done in the finish_dynamic_symbol routine. */
2663 bfd_put_64 (output_bfd
, relocation
,
2664 base_got
->contents
+ off
);
2665 /* Note that this is harmless for the GOTPLT64
2666 case, as -1 | 1 still is -1. */
2672 relocation
= (base_got
->output_section
->vma
2673 + base_got
->output_offset
+ off
);
2678 if (h
->plt
.offset
== (bfd_vma
) -1)
2680 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2681 if (r_type
== htab
->pointer_r_type
2682 && (input_section
->flags
& SEC_CODE
) == 0)
2683 goto do_ifunc_pointer
;
2684 goto bad_ifunc_reloc
;
2687 /* STT_GNU_IFUNC symbol must go through PLT. */
2688 if (htab
->elf
.splt
!= NULL
)
2690 if (htab
->plt_second
!= NULL
)
2692 resolved_plt
= htab
->plt_second
;
2693 plt_offset
= eh
->plt_second
.offset
;
2697 resolved_plt
= htab
->elf
.splt
;
2698 plt_offset
= h
->plt
.offset
;
2703 resolved_plt
= htab
->elf
.iplt
;
2704 plt_offset
= h
->plt
.offset
;
2707 relocation
= (resolved_plt
->output_section
->vma
2708 + resolved_plt
->output_offset
+ plt_offset
);
2714 if (h
->root
.root
.string
)
2715 name
= h
->root
.root
.string
;
2717 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2720 /* xgettext:c-format */
2721 (_("%pB: relocation %s against STT_GNU_IFUNC "
2722 "symbol `%s' isn't supported"), input_bfd
,
2724 bfd_set_error (bfd_error_bad_value
);
2728 if (bfd_link_pic (info
))
2733 if (ABI_64_P (output_bfd
))
2738 if (rel
->r_addend
!= 0)
2740 if (h
->root
.root
.string
)
2741 name
= h
->root
.root
.string
;
2743 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
2746 /* xgettext:c-format */
2747 (_("%pB: relocation %s against STT_GNU_IFUNC "
2748 "symbol `%s' has non-zero addend: %" PRId64
),
2749 input_bfd
, howto
->name
, name
, (int64_t) rel
->r_addend
);
2750 bfd_set_error (bfd_error_bad_value
);
2754 /* Generate dynamic relcoation only when there is a
2755 non-GOT reference in a shared object or there is no
2757 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2758 || h
->plt
.offset
== (bfd_vma
) -1)
2760 Elf_Internal_Rela outrel
;
2763 /* Need a dynamic relocation to get the real function
2765 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2769 if (outrel
.r_offset
== (bfd_vma
) -1
2770 || outrel
.r_offset
== (bfd_vma
) -2)
2773 outrel
.r_offset
+= (input_section
->output_section
->vma
2774 + input_section
->output_offset
);
2776 if (POINTER_LOCAL_IFUNC_P (info
, h
))
2778 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
2779 h
->root
.root
.string
,
2780 h
->root
.u
.def
.section
->owner
);
2782 /* This symbol is resolved locally. */
2783 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
2784 outrel
.r_addend
= (h
->root
.u
.def
.value
2785 + h
->root
.u
.def
.section
->output_section
->vma
2786 + h
->root
.u
.def
.section
->output_offset
);
2788 if (htab
->params
->report_relative_reloc
)
2789 _bfd_x86_elf_link_report_relative_reloc
2790 (info
, input_section
, h
, sym
,
2791 "R_X86_64_IRELATIVE", &outrel
);
2795 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
2796 outrel
.r_addend
= 0;
2799 /* Dynamic relocations are stored in
2800 1. .rela.ifunc section in PIC object.
2801 2. .rela.got section in dynamic executable.
2802 3. .rela.iplt section in static executable. */
2803 if (bfd_link_pic (info
))
2804 sreloc
= htab
->elf
.irelifunc
;
2805 else if (htab
->elf
.splt
!= NULL
)
2806 sreloc
= htab
->elf
.srelgot
;
2808 sreloc
= htab
->elf
.irelplt
;
2809 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2811 /* If this reloc is against an external symbol, we
2812 do not want to fiddle with the addend. Otherwise,
2813 we need to include the symbol value so that it
2814 becomes an addend for the dynamic reloc. For an
2815 internal symbol, we have updated addend. */
2820 case R_X86_64_PC32_BND
:
2822 case R_X86_64_PLT32
:
2823 case R_X86_64_PLT32_BND
:
2829 resolved_to_zero
= (eh
!= NULL
2830 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
2832 /* When generating a shared object, the relocations handled here are
2833 copied into the output file to be resolved at run time. */
2836 case R_X86_64_GOT32
:
2837 case R_X86_64_GOT64
:
2838 /* Relocation is to the entry for this symbol in the global
2840 case R_X86_64_GOTPCREL
:
2841 case R_X86_64_GOTPCRELX
:
2842 case R_X86_64_REX_GOTPCRELX
:
2843 case R_X86_64_GOTPCREL64
:
2844 /* Use global offset table entry as symbol value. */
2845 case R_X86_64_GOTPLT64
:
2846 /* This is obsolete and treated the same as GOT64. */
2847 base_got
= htab
->elf
.sgot
;
2849 if (htab
->elf
.sgot
== NULL
)
2852 relative_reloc
= false;
2855 off
= h
->got
.offset
;
2857 && h
->plt
.offset
!= (bfd_vma
)-1
2858 && off
== (bfd_vma
)-1)
2860 /* We can't use h->got.offset here to save
2861 state, or even just remember the offset, as
2862 finish_dynamic_symbol would use that as offset into
2864 bfd_vma plt_index
= (h
->plt
.offset
/ plt_entry_size
2865 - htab
->plt
.has_plt0
);
2866 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2867 base_got
= htab
->elf
.sgotplt
;
2870 if (RESOLVED_LOCALLY_P (info
, h
, htab
))
2872 /* We must initialize this entry in the global offset
2873 table. Since the offset must always be a multiple
2874 of 8, we use the least significant bit to record
2875 whether we have initialized it already.
2877 When doing a dynamic link, we create a .rela.got
2878 relocation entry to initialize the value. This is
2879 done in the finish_dynamic_symbol routine. */
2884 bfd_put_64 (output_bfd
, relocation
,
2885 base_got
->contents
+ off
);
2886 /* Note that this is harmless for the GOTPLT64 case,
2887 as -1 | 1 still is -1. */
2890 if (GENERATE_RELATIVE_RELOC_P (info
, h
))
2892 /* If this symbol isn't dynamic in PIC,
2893 generate R_X86_64_RELATIVE here. */
2894 eh
->no_finish_dynamic_symbol
= 1;
2895 relative_reloc
= true;
2900 unresolved_reloc
= false;
2904 if (local_got_offsets
== NULL
)
2907 off
= local_got_offsets
[r_symndx
];
2909 /* The offset must always be a multiple of 8. We use
2910 the least significant bit to record whether we have
2911 already generated the necessary reloc. */
2916 bfd_put_64 (output_bfd
, relocation
,
2917 base_got
->contents
+ off
);
2918 local_got_offsets
[r_symndx
] |= 1;
2920 /* NB: GOTPCREL relocations against local absolute
2921 symbol store relocation value in the GOT slot
2922 without relative relocation. */
2923 if (bfd_link_pic (info
)
2924 && !(sym
->st_shndx
== SHN_ABS
2925 && (r_type
== R_X86_64_GOTPCREL
2926 || r_type
== R_X86_64_GOTPCRELX
2927 || r_type
== R_X86_64_REX_GOTPCRELX
)))
2928 relative_reloc
= true;
2935 Elf_Internal_Rela outrel
;
2937 /* We need to generate a R_X86_64_RELATIVE reloc
2938 for the dynamic linker. */
2939 s
= htab
->elf
.srelgot
;
2943 outrel
.r_offset
= (base_got
->output_section
->vma
2944 + base_got
->output_offset
2946 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
2947 outrel
.r_addend
= relocation
;
2949 if (htab
->params
->report_relative_reloc
)
2950 _bfd_x86_elf_link_report_relative_reloc
2951 (info
, input_section
, h
, sym
, "R_X86_64_RELATIVE",
2954 elf_append_rela (output_bfd
, s
, &outrel
);
2957 if (off
>= (bfd_vma
) -2)
2960 relocation
= base_got
->output_section
->vma
2961 + base_got
->output_offset
+ off
;
2962 if (r_type
!= R_X86_64_GOTPCREL
2963 && r_type
!= R_X86_64_GOTPCRELX
2964 && r_type
!= R_X86_64_REX_GOTPCRELX
2965 && r_type
!= R_X86_64_GOTPCREL64
)
2966 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2967 - htab
->elf
.sgotplt
->output_offset
;
2971 case R_X86_64_GOTOFF64
:
2972 /* Relocation is relative to the start of the global offset
2975 /* Check to make sure it isn't a protected function or data
2976 symbol for shared library since it may not be local when
2977 used as function address or with copy relocation. We also
2978 need to make sure that a symbol is referenced locally. */
2979 if (bfd_link_pic (info
) && h
)
2981 if (!h
->def_regular
)
2985 switch (ELF_ST_VISIBILITY (h
->other
))
2988 v
= _("hidden symbol");
2991 v
= _("internal symbol");
2994 v
= _("protected symbol");
3002 /* xgettext:c-format */
3003 (_("%pB: relocation R_X86_64_GOTOFF64 against undefined %s"
3004 " `%s' can not be used when making a shared object"),
3005 input_bfd
, v
, h
->root
.root
.string
);
3006 bfd_set_error (bfd_error_bad_value
);
3009 else if (!bfd_link_executable (info
)
3010 && !SYMBOL_REFERENCES_LOCAL_P (info
, h
)
3011 && (h
->type
== STT_FUNC
3012 || h
->type
== STT_OBJECT
)
3013 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3016 /* xgettext:c-format */
3017 (_("%pB: relocation R_X86_64_GOTOFF64 against protected %s"
3018 " `%s' can not be used when making a shared object"),
3020 h
->type
== STT_FUNC
? "function" : "data",
3021 h
->root
.root
.string
);
3022 bfd_set_error (bfd_error_bad_value
);
3027 /* Note that sgot is not involved in this
3028 calculation. We always want the start of .got.plt. If we
3029 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3030 permitted by the ABI, we might have to change this
3032 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3033 + htab
->elf
.sgotplt
->output_offset
;
3036 case R_X86_64_GOTPC32
:
3037 case R_X86_64_GOTPC64
:
3038 /* Use global offset table as symbol value. */
3039 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3040 + htab
->elf
.sgotplt
->output_offset
;
3041 unresolved_reloc
= false;
3044 case R_X86_64_PLTOFF64
:
3045 /* Relocation is PLT entry relative to GOT. For local
3046 symbols it's the symbol itself relative to GOT. */
3048 /* See PLT32 handling. */
3049 && (h
->plt
.offset
!= (bfd_vma
) -1
3050 || eh
->plt_got
.offset
!= (bfd_vma
) -1)
3051 && htab
->elf
.splt
!= NULL
)
3053 if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
3055 /* Use the GOT PLT. */
3056 resolved_plt
= htab
->plt_got
;
3057 plt_offset
= eh
->plt_got
.offset
;
3059 else if (htab
->plt_second
!= NULL
)
3061 resolved_plt
= htab
->plt_second
;
3062 plt_offset
= eh
->plt_second
.offset
;
3066 resolved_plt
= htab
->elf
.splt
;
3067 plt_offset
= h
->plt
.offset
;
3070 relocation
= (resolved_plt
->output_section
->vma
3071 + resolved_plt
->output_offset
3073 unresolved_reloc
= false;
3076 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3077 + htab
->elf
.sgotplt
->output_offset
;
3080 case R_X86_64_PLT32
:
3081 case R_X86_64_PLT32_BND
:
3082 /* Relocation is to the entry for this symbol in the
3083 procedure linkage table. */
3085 /* Resolve a PLT32 reloc against a local symbol directly,
3086 without using the procedure linkage table. */
3090 if ((h
->plt
.offset
== (bfd_vma
) -1
3091 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3092 || htab
->elf
.splt
== NULL
)
3094 /* We didn't make a PLT entry for this symbol. This
3095 happens when statically linking PIC code, or when
3096 using -Bsymbolic. */
3101 if (h
->plt
.offset
!= (bfd_vma
) -1)
3103 if (htab
->plt_second
!= NULL
)
3105 resolved_plt
= htab
->plt_second
;
3106 plt_offset
= eh
->plt_second
.offset
;
3110 resolved_plt
= htab
->elf
.splt
;
3111 plt_offset
= h
->plt
.offset
;
3116 /* Use the GOT PLT. */
3117 resolved_plt
= htab
->plt_got
;
3118 plt_offset
= eh
->plt_got
.offset
;
3121 relocation
= (resolved_plt
->output_section
->vma
3122 + resolved_plt
->output_offset
3124 unresolved_reloc
= false;
3127 case R_X86_64_SIZE32
:
3128 case R_X86_64_SIZE64
:
3129 /* Set to symbol size. */
3130 relocation
= st_size
;
3136 case R_X86_64_PC32_BND
:
3137 /* Don't complain about -fPIC if the symbol is undefined when
3138 building executable unless it is unresolved weak symbol,
3139 references a dynamic definition in PIE or -z nocopyreloc
3142 = (info
->nocopyreloc
3144 && !h
->root
.linker_def
3145 && !h
->root
.ldscript_def
3146 && eh
->def_protected
3147 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)));
3149 if ((input_section
->flags
& SEC_ALLOC
) != 0
3150 && (input_section
->flags
& SEC_READONLY
) != 0
3152 && ((bfd_link_executable (info
)
3153 && ((h
->root
.type
== bfd_link_hash_undefweak
3155 || !UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
3157 || (bfd_link_pie (info
)
3158 && !SYMBOL_DEFINED_NON_SHARED_P (h
)
3162 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))))
3163 || bfd_link_dll (info
)))
3166 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3168 /* Symbol is referenced locally. Make sure it is
3170 fail
= !SYMBOL_DEFINED_NON_SHARED_P (h
);
3172 else if (bfd_link_pie (info
))
3174 /* We can only use PC-relative relocations in PIE
3175 from non-code sections. */
3176 if (h
->type
== STT_FUNC
3177 && (sec
->flags
& SEC_CODE
) != 0)
3180 else if (no_copyreloc_p
|| bfd_link_dll (info
))
3182 /* Symbol doesn't need copy reloc and isn't
3183 referenced locally. Don't allow PC-relative
3184 relocations against default and protected
3185 symbols since address of protected function
3186 and location of protected data may not be in
3187 the shared object. */
3188 fail
= (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3189 || ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
);
3193 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3194 h
, NULL
, NULL
, howto
);
3196 /* Since x86-64 has PC-relative PLT, we can use PLT in PIE
3197 as function address. */
3199 && (input_section
->flags
& SEC_CODE
) == 0
3200 && bfd_link_pie (info
)
3201 && h
->type
== STT_FUNC
3212 /* FIXME: The ABI says the linker should make sure the value is
3213 the same when it's zeroextended to 64 bit. */
3216 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3219 need_copy_reloc_in_pie
= (bfd_link_pie (info
)
3224 == bfd_link_hash_undefined
))
3225 && (X86_PCREL_TYPE_P (r_type
)
3226 || X86_SIZE_TYPE_P (r_type
)));
3228 if (GENERATE_DYNAMIC_RELOCATION_P (info
, eh
, r_type
, sec
,
3229 need_copy_reloc_in_pie
,
3230 resolved_to_zero
, false))
3232 Elf_Internal_Rela outrel
;
3233 bool skip
, relocate
;
3235 const char *relative_reloc_name
= NULL
;
3237 /* When generating a shared object, these relocations
3238 are copied into the output file to be resolved at run
3244 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3246 if (outrel
.r_offset
== (bfd_vma
) -1)
3248 else if (outrel
.r_offset
== (bfd_vma
) -2)
3249 skip
= true, relocate
= true;
3251 outrel
.r_offset
+= (input_section
->output_section
->vma
3252 + input_section
->output_offset
);
3255 memset (&outrel
, 0, sizeof outrel
);
3257 else if (COPY_INPUT_RELOC_P (info
, h
, r_type
))
3259 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3260 outrel
.r_addend
= rel
->r_addend
;
3264 /* This symbol is local, or marked to become local.
3265 When relocation overflow check is disabled, we
3266 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
3267 if (r_type
== htab
->pointer_r_type
3268 || (r_type
== R_X86_64_32
3269 && htab
->params
->no_reloc_overflow_check
))
3272 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3273 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3274 relative_reloc_name
= "R_X86_64_RELATIVE";
3276 else if (r_type
== R_X86_64_64
3277 && !ABI_64_P (output_bfd
))
3280 outrel
.r_info
= htab
->r_info (0,
3281 R_X86_64_RELATIVE64
);
3282 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3283 relative_reloc_name
= "R_X86_64_RELATIVE64";
3284 /* Check addend overflow. */
3285 if ((outrel
.r_addend
& 0x80000000)
3286 != (rel
->r_addend
& 0x80000000))
3289 int addend
= rel
->r_addend
;
3290 if (h
&& h
->root
.root
.string
)
3291 name
= h
->root
.root
.string
;
3293 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3296 /* xgettext:c-format */
3297 (_("%pB: addend %s%#x in relocation %s against "
3298 "symbol `%s' at %#" PRIx64
3299 " in section `%pA' is out of range"),
3300 input_bfd
, addend
< 0 ? "-" : "", addend
,
3301 howto
->name
, name
, (uint64_t) rel
->r_offset
,
3303 bfd_set_error (bfd_error_bad_value
);
3311 if (bfd_is_abs_section (sec
))
3313 else if (sec
== NULL
|| sec
->owner
== NULL
)
3315 bfd_set_error (bfd_error_bad_value
);
3322 /* We are turning this relocation into one
3323 against a section symbol. It would be
3324 proper to subtract the symbol's value,
3325 osec->vma, from the emitted reloc addend,
3326 but ld.so expects buggy relocs. */
3327 osec
= sec
->output_section
;
3328 sindx
= elf_section_data (osec
)->dynindx
;
3331 asection
*oi
= htab
->elf
.text_index_section
;
3332 sindx
= elf_section_data (oi
)->dynindx
;
3334 BFD_ASSERT (sindx
!= 0);
3337 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3338 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3342 sreloc
= elf_section_data (input_section
)->sreloc
;
3344 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3346 r
= bfd_reloc_notsupported
;
3347 goto check_relocation_error
;
3350 if (relative_reloc_name
3351 && htab
->params
->report_relative_reloc
)
3352 _bfd_x86_elf_link_report_relative_reloc
3353 (info
, input_section
, h
, sym
, relative_reloc_name
,
3356 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3358 /* If this reloc is against an external symbol, we do
3359 not want to fiddle with the addend. Otherwise, we
3360 need to include the symbol value so that it becomes
3361 an addend for the dynamic reloc. */
3368 case R_X86_64_TLSGD
:
3369 case R_X86_64_GOTPC32_TLSDESC
:
3370 case R_X86_64_TLSDESC_CALL
:
3371 case R_X86_64_GOTTPOFF
:
3372 tls_type
= GOT_UNKNOWN
;
3373 if (h
== NULL
&& local_got_offsets
)
3374 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
3376 tls_type
= elf_x86_hash_entry (h
)->tls_type
;
3378 r_type_tls
= r_type
;
3379 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3380 input_section
, contents
,
3381 symtab_hdr
, sym_hashes
,
3382 &r_type_tls
, tls_type
, rel
,
3383 relend
, h
, r_symndx
, true))
3386 if (r_type_tls
== R_X86_64_TPOFF32
)
3388 bfd_vma roff
= rel
->r_offset
;
3390 BFD_ASSERT (! unresolved_reloc
);
3392 if (r_type
== R_X86_64_TLSGD
)
3394 /* GD->LE transition. For 64bit, change
3395 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3396 .word 0x6666; rex64; call __tls_get_addr@PLT
3398 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3400 call *__tls_get_addr@GOTPCREL(%rip)
3401 which may be converted to
3402 addr32 call __tls_get_addr
3405 leaq foo@tpoff(%rax), %rax
3407 leaq foo@tlsgd(%rip), %rdi
3408 .word 0x6666; rex64; call __tls_get_addr@PLT
3410 leaq foo@tlsgd(%rip), %rdi
3412 call *__tls_get_addr@GOTPCREL(%rip)
3413 which may be converted to
3414 addr32 call __tls_get_addr
3417 leaq foo@tpoff(%rax), %rax
3418 For largepic, change:
3419 leaq foo@tlsgd(%rip), %rdi
3420 movabsq $__tls_get_addr@pltoff, %rax
3425 leaq foo@tpoff(%rax), %rax
3426 nopw 0x0(%rax,%rax,1) */
3428 if (ABI_64_P (output_bfd
))
3430 if (contents
[roff
+ 5] == 0xb8)
3433 || (roff
- 3 + 22) > input_section
->size
)
3436 info
->callbacks
->einfo
3437 (_("%F%P: corrupt input: %pB\n"),
3441 memcpy (contents
+ roff
- 3,
3442 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
3443 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3449 || (roff
- 4 + 16) > input_section
->size
)
3451 memcpy (contents
+ roff
- 4,
3452 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3459 || (roff
- 3 + 15) > input_section
->size
)
3461 memcpy (contents
+ roff
- 3,
3462 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3465 bfd_put_32 (output_bfd
,
3466 elf_x86_64_tpoff (info
, relocation
),
3467 contents
+ roff
+ 8 + largepic
);
3468 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
3469 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
3474 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3476 /* GDesc -> LE transition.
3477 It's originally something like:
3478 leaq x@tlsdesc(%rip), %rax <--- LP64 mode.
3479 rex leal x@tlsdesc(%rip), %eax <--- X32 mode.
3482 movq $x@tpoff, %rax <--- LP64 mode.
3483 rex movl $x@tpoff, %eax <--- X32 mode.
3486 unsigned int val
, type
;
3490 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3491 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3492 bfd_put_8 (output_bfd
,
3493 (type
& 0x48) | ((type
>> 2) & 1),
3494 contents
+ roff
- 3);
3495 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
3496 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3497 contents
+ roff
- 1);
3498 bfd_put_32 (output_bfd
,
3499 elf_x86_64_tpoff (info
, relocation
),
3503 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3505 /* GDesc -> LE transition.
3507 call *(%rax) <--- LP64 mode.
3508 call *(%eax) <--- X32 mode.
3510 xchg %ax,%ax <-- LP64 mode.
3511 nopl (%rax) <-- X32 mode.
3513 unsigned int prefix
= 0;
3514 if (!ABI_64_P (input_bfd
))
3516 /* Check for call *x@tlsdesc(%eax). */
3517 if (contents
[roff
] == 0x67)
3522 bfd_put_8 (output_bfd
, 0x0f, contents
+ roff
);
3523 bfd_put_8 (output_bfd
, 0x1f, contents
+ roff
+ 1);
3524 bfd_put_8 (output_bfd
, 0x00, contents
+ roff
+ 2);
3528 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3529 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3533 else if (r_type
== R_X86_64_GOTTPOFF
)
3535 /* IE->LE transition:
3536 For 64bit, originally it can be one of:
3537 movq foo@gottpoff(%rip), %reg
3538 addq foo@gottpoff(%rip), %reg
3541 leaq foo(%reg), %reg
3543 For 32bit, originally it can be one of:
3544 movq foo@gottpoff(%rip), %reg
3545 addl foo@gottpoff(%rip), %reg
3548 leal foo(%reg), %reg
3551 unsigned int val
, type
, reg
;
3554 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3561 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3562 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3571 bfd_put_8 (output_bfd
, 0x49,
3572 contents
+ roff
- 3);
3574 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3578 bfd_put_8 (output_bfd
, 0x41,
3579 contents
+ roff
- 3);
3581 bfd_put_8 (output_bfd
, 0xc7,
3582 contents
+ roff
- 2);
3583 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3584 contents
+ roff
- 1);
3588 /* addq/addl -> addq/addl - addressing with %rsp/%r12
3594 bfd_put_8 (output_bfd
, 0x49,
3595 contents
+ roff
- 3);
3597 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3601 bfd_put_8 (output_bfd
, 0x41,
3602 contents
+ roff
- 3);
3604 bfd_put_8 (output_bfd
, 0x81,
3605 contents
+ roff
- 2);
3606 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3607 contents
+ roff
- 1);
3611 /* addq/addl -> leaq/leal */
3616 bfd_put_8 (output_bfd
, 0x4d,
3617 contents
+ roff
- 3);
3619 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3623 bfd_put_8 (output_bfd
, 0x45,
3624 contents
+ roff
- 3);
3626 bfd_put_8 (output_bfd
, 0x8d,
3627 contents
+ roff
- 2);
3628 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
3629 contents
+ roff
- 1);
3631 bfd_put_32 (output_bfd
,
3632 elf_x86_64_tpoff (info
, relocation
),
3640 if (htab
->elf
.sgot
== NULL
)
3645 off
= h
->got
.offset
;
3646 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
3650 if (local_got_offsets
== NULL
)
3653 off
= local_got_offsets
[r_symndx
];
3654 offplt
= local_tlsdesc_gotents
[r_symndx
];
3661 Elf_Internal_Rela outrel
;
3665 if (htab
->elf
.srelgot
== NULL
)
3668 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3670 if (GOT_TLS_GDESC_P (tls_type
))
3672 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
3673 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
3674 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
3675 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3676 + htab
->elf
.sgotplt
->output_offset
3678 + htab
->sgotplt_jump_table_size
);
3679 sreloc
= htab
->elf
.srelplt
;
3681 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3683 outrel
.r_addend
= 0;
3684 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3687 sreloc
= htab
->elf
.srelgot
;
3689 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3690 + htab
->elf
.sgot
->output_offset
+ off
);
3692 if (GOT_TLS_GD_P (tls_type
))
3693 dr_type
= R_X86_64_DTPMOD64
;
3694 else if (GOT_TLS_GDESC_P (tls_type
))
3697 dr_type
= R_X86_64_TPOFF64
;
3699 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
3700 outrel
.r_addend
= 0;
3701 if ((dr_type
== R_X86_64_TPOFF64
3702 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
3703 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3704 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
3706 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3708 if (GOT_TLS_GD_P (tls_type
))
3712 BFD_ASSERT (! unresolved_reloc
);
3713 bfd_put_64 (output_bfd
,
3714 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3715 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3719 bfd_put_64 (output_bfd
, 0,
3720 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3721 outrel
.r_info
= htab
->r_info (indx
,
3723 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
3724 elf_append_rela (output_bfd
, sreloc
,
3733 local_got_offsets
[r_symndx
] |= 1;
3736 if (off
>= (bfd_vma
) -2
3737 && ! GOT_TLS_GDESC_P (tls_type
))
3739 if (r_type_tls
== r_type
)
3741 if (r_type
== R_X86_64_GOTPC32_TLSDESC
3742 || r_type
== R_X86_64_TLSDESC_CALL
)
3743 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3744 + htab
->elf
.sgotplt
->output_offset
3745 + offplt
+ htab
->sgotplt_jump_table_size
;
3747 relocation
= htab
->elf
.sgot
->output_section
->vma
3748 + htab
->elf
.sgot
->output_offset
+ off
;
3749 unresolved_reloc
= false;
3753 bfd_vma roff
= rel
->r_offset
;
3755 if (r_type
== R_X86_64_TLSGD
)
3757 /* GD->IE transition. For 64bit, change
3758 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3759 .word 0x6666; rex64; call __tls_get_addr@PLT
3761 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3763 call *__tls_get_addr@GOTPCREL(%rip
3764 which may be converted to
3765 addr32 call __tls_get_addr
3768 addq foo@gottpoff(%rip), %rax
3770 leaq foo@tlsgd(%rip), %rdi
3771 .word 0x6666; rex64; call __tls_get_addr@PLT
3773 leaq foo@tlsgd(%rip), %rdi
3775 call *__tls_get_addr@GOTPCREL(%rip)
3776 which may be converted to
3777 addr32 call __tls_get_addr
3780 addq foo@gottpoff(%rip), %rax
3781 For largepic, change:
3782 leaq foo@tlsgd(%rip), %rdi
3783 movabsq $__tls_get_addr@pltoff, %rax
3788 addq foo@gottpoff(%rax), %rax
3789 nopw 0x0(%rax,%rax,1) */
3791 if (ABI_64_P (output_bfd
))
3793 if (contents
[roff
+ 5] == 0xb8)
3796 || (roff
- 3 + 22) > input_section
->size
)
3798 memcpy (contents
+ roff
- 3,
3799 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
3800 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3806 || (roff
- 4 + 16) > input_section
->size
)
3808 memcpy (contents
+ roff
- 4,
3809 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3816 || (roff
- 3 + 15) > input_section
->size
)
3818 memcpy (contents
+ roff
- 3,
3819 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3823 relocation
= (htab
->elf
.sgot
->output_section
->vma
3824 + htab
->elf
.sgot
->output_offset
+ off
3827 - input_section
->output_section
->vma
3828 - input_section
->output_offset
3830 bfd_put_32 (output_bfd
, relocation
,
3831 contents
+ roff
+ 8 + largepic
);
3832 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
3837 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3839 /* GDesc -> IE transition.
3840 It's originally something like:
3841 leaq x@tlsdesc(%rip), %rax <--- LP64 mode.
3842 rex leal x@tlsdesc(%rip), %eax <--- X32 mode.
3845 # before xchg %ax,%ax in LP64 mode.
3846 movq x@gottpoff(%rip), %rax
3847 # before nopl (%rax) in X32 mode.
3848 rex movl x@gottpoff(%rip), %eax
3851 /* Now modify the instruction as appropriate. To
3852 turn a lea into a mov in the form we use it, it
3853 suffices to change the second byte from 0x8d to
3857 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3859 bfd_put_32 (output_bfd
,
3860 htab
->elf
.sgot
->output_section
->vma
3861 + htab
->elf
.sgot
->output_offset
+ off
3863 - input_section
->output_section
->vma
3864 - input_section
->output_offset
3869 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3871 /* GDesc -> IE transition.
3873 call *(%rax) <--- LP64 mode.
3874 call *(%eax) <--- X32 mode.
3877 xchg %ax, %ax <-- LP64 mode.
3878 nopl (%rax) <-- X32 mode.
3881 unsigned int prefix
= 0;
3882 if (!ABI_64_P (input_bfd
))
3884 /* Check for call *x@tlsdesc(%eax). */
3885 if (contents
[roff
] == 0x67)
3890 bfd_put_8 (output_bfd
, 0x0f, contents
+ roff
);
3891 bfd_put_8 (output_bfd
, 0x1f, contents
+ roff
+ 1);
3892 bfd_put_8 (output_bfd
, 0x00, contents
+ roff
+ 2);
3896 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3897 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3906 case R_X86_64_TLSLD
:
3907 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3908 input_section
, contents
,
3909 symtab_hdr
, sym_hashes
,
3910 &r_type
, GOT_UNKNOWN
, rel
,
3911 relend
, h
, r_symndx
, true))
3914 if (r_type
!= R_X86_64_TLSLD
)
3916 /* LD->LE transition:
3917 leaq foo@tlsld(%rip), %rdi
3918 call __tls_get_addr@PLT
3919 For 64bit, we change it into:
3920 .word 0x6666; .byte 0x66; movq %fs:0, %rax
3921 For 32bit, we change it into:
3922 nopl 0x0(%rax); movl %fs:0, %eax
3924 leaq foo@tlsld(%rip), %rdi;
3925 call *__tls_get_addr@GOTPCREL(%rip)
3926 which may be converted to
3927 addr32 call __tls_get_addr
3928 For 64bit, we change it into:
3929 .word 0x6666; .word 0x6666; movq %fs:0, %rax
3930 For 32bit, we change it into:
3931 nopw 0x0(%rax); movl %fs:0, %eax
3932 For largepic, change:
3933 leaq foo@tlsgd(%rip), %rdi
3934 movabsq $__tls_get_addr@pltoff, %rax
3938 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
3941 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
3942 if (ABI_64_P (output_bfd
))
3944 if ((rel
->r_offset
+ 5) >= input_section
->size
)
3946 if (contents
[rel
->r_offset
+ 5] == 0xb8)
3948 if (rel
->r_offset
< 3
3949 || (rel
->r_offset
- 3 + 22) > input_section
->size
)
3951 memcpy (contents
+ rel
->r_offset
- 3,
3952 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
3953 "\x64\x48\x8b\x04\x25\0\0\0", 22);
3955 else if (contents
[rel
->r_offset
+ 4] == 0xff
3956 || contents
[rel
->r_offset
+ 4] == 0x67)
3958 if (rel
->r_offset
< 3
3959 || (rel
->r_offset
- 3 + 13) > input_section
->size
)
3961 memcpy (contents
+ rel
->r_offset
- 3,
3962 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
3968 if (rel
->r_offset
< 3
3969 || (rel
->r_offset
- 3 + 12) > input_section
->size
)
3971 memcpy (contents
+ rel
->r_offset
- 3,
3972 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3977 if ((rel
->r_offset
+ 4) >= input_section
->size
)
3979 if (contents
[rel
->r_offset
+ 4] == 0xff)
3981 if (rel
->r_offset
< 3
3982 || (rel
->r_offset
- 3 + 13) > input_section
->size
)
3984 memcpy (contents
+ rel
->r_offset
- 3,
3985 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
3990 if (rel
->r_offset
< 3
3991 || (rel
->r_offset
- 3 + 12) > input_section
->size
)
3993 memcpy (contents
+ rel
->r_offset
- 3,
3994 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
3997 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
3998 and R_X86_64_PLTOFF64. */
4004 if (htab
->elf
.sgot
== NULL
)
4007 off
= htab
->tls_ld_or_ldm_got
.offset
;
4012 Elf_Internal_Rela outrel
;
4014 if (htab
->elf
.srelgot
== NULL
)
4017 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4018 + htab
->elf
.sgot
->output_offset
+ off
);
4020 bfd_put_64 (output_bfd
, 0,
4021 htab
->elf
.sgot
->contents
+ off
);
4022 bfd_put_64 (output_bfd
, 0,
4023 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4024 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4025 outrel
.r_addend
= 0;
4026 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4028 htab
->tls_ld_or_ldm_got
.offset
|= 1;
4030 relocation
= htab
->elf
.sgot
->output_section
->vma
4031 + htab
->elf
.sgot
->output_offset
+ off
;
4032 unresolved_reloc
= false;
4035 case R_X86_64_DTPOFF32
:
4036 if (!bfd_link_executable (info
)
4037 || (input_section
->flags
& SEC_CODE
) == 0)
4038 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
4040 relocation
= elf_x86_64_tpoff (info
, relocation
);
4043 case R_X86_64_TPOFF32
:
4044 case R_X86_64_TPOFF64
:
4045 BFD_ASSERT (bfd_link_executable (info
));
4046 relocation
= elf_x86_64_tpoff (info
, relocation
);
4049 case R_X86_64_DTPOFF64
:
4050 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4051 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
4058 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4059 because such sections are not SEC_ALLOC and thus ld.so will
4060 not process them. */
4061 if (unresolved_reloc
4062 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4064 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4065 rel
->r_offset
) != (bfd_vma
) -1)
4070 sec
= h
->root
.u
.def
.section
;
4071 if ((info
->nocopyreloc
4072 || (eh
->def_protected
4073 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
4074 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))
4075 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
4076 h
, NULL
, NULL
, howto
);
4081 /* xgettext:c-format */
4082 (_("%pB(%pA+%#" PRIx64
"): "
4083 "unresolvable %s relocation against symbol `%s'"),
4086 (uint64_t) rel
->r_offset
,
4088 h
->root
.root
.string
);
4094 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4095 contents
, rel
->r_offset
,
4096 relocation
, rel
->r_addend
);
4098 check_relocation_error
:
4099 if (r
!= bfd_reloc_ok
)
4104 name
= h
->root
.root
.string
;
4107 name
= bfd_elf_string_from_elf_section (input_bfd
,
4108 symtab_hdr
->sh_link
,
4113 name
= bfd_section_name (sec
);
4116 if (r
== bfd_reloc_overflow
)
4118 if (converted_reloc
)
4120 info
->callbacks
->einfo
4121 ("%X%H:", input_bfd
, input_section
, rel
->r_offset
);
4122 info
->callbacks
->einfo
4123 (_(" failed to convert GOTPCREL relocation against "
4124 "'%s'; relink with --no-relax\n"),
4129 (*info
->callbacks
->reloc_overflow
)
4130 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4131 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4136 /* xgettext:c-format */
4137 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
4138 input_bfd
, input_section
,
4139 (uint64_t) rel
->r_offset
, name
, (int) r
);
4150 Elf_Internal_Shdr
*rel_hdr
;
4151 size_t deleted
= rel
- wrel
;
4153 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
4154 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
4155 if (rel_hdr
->sh_size
== 0)
4157 /* It is too late to remove an empty reloc section. Leave
4159 ??? What is wrong with an empty section??? */
4160 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
4163 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
4164 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
4165 input_section
->reloc_count
-= deleted
;
4171 /* Finish up dynamic symbol handling. We set the contents of various
4172 dynamic sections here. */
4175 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4176 struct bfd_link_info
*info
,
4177 struct elf_link_hash_entry
*h
,
4178 Elf_Internal_Sym
*sym
)
4180 struct elf_x86_link_hash_table
*htab
;
4181 bool use_plt_second
;
4182 struct elf_x86_link_hash_entry
*eh
;
4183 bool local_undefweak
;
4185 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4189 /* Use the second PLT section only if there is .plt section. */
4190 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
4192 eh
= (struct elf_x86_link_hash_entry
*) h
;
4193 if (eh
->no_finish_dynamic_symbol
)
4196 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4197 resolved undefined weak symbols in executable so that their
4198 references have value 0 at run-time. */
4199 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
4201 if (h
->plt
.offset
!= (bfd_vma
) -1)
4204 bfd_vma got_offset
, plt_offset
;
4205 Elf_Internal_Rela rela
;
4207 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
4208 const struct elf_backend_data
*bed
;
4209 bfd_vma plt_got_pcrel_offset
;
4211 /* When building a static executable, use .iplt, .igot.plt and
4212 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4213 if (htab
->elf
.splt
!= NULL
)
4215 plt
= htab
->elf
.splt
;
4216 gotplt
= htab
->elf
.sgotplt
;
4217 relplt
= htab
->elf
.srelplt
;
4221 plt
= htab
->elf
.iplt
;
4222 gotplt
= htab
->elf
.igotplt
;
4223 relplt
= htab
->elf
.irelplt
;
4226 VERIFY_PLT_ENTRY (info
, h
, plt
, gotplt
, relplt
, local_undefweak
)
4228 /* Get the index in the procedure linkage table which
4229 corresponds to this symbol. This is the index of this symbol
4230 in all the symbols for which we are making plt entries. The
4231 first entry in the procedure linkage table is reserved.
4233 Get the offset into the .got table of the entry that
4234 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4235 bytes. The first three are reserved for the dynamic linker.
4237 For static executables, we don't reserve anything. */
4239 if (plt
== htab
->elf
.splt
)
4241 got_offset
= (h
->plt
.offset
/ htab
->plt
.plt_entry_size
4242 - htab
->plt
.has_plt0
);
4243 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4247 got_offset
= h
->plt
.offset
/ htab
->plt
.plt_entry_size
;
4248 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4251 /* Fill in the entry in the procedure linkage table. */
4252 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
4253 htab
->plt
.plt_entry_size
);
4256 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
4257 htab
->non_lazy_plt
->plt_entry
,
4258 htab
->non_lazy_plt
->plt_entry_size
);
4260 resolved_plt
= htab
->plt_second
;
4261 plt_offset
= eh
->plt_second
.offset
;
4266 plt_offset
= h
->plt
.offset
;
4269 /* Insert the relocation positions of the plt section. */
4271 /* Put offset the PC-relative instruction referring to the GOT entry,
4272 subtracting the size of that instruction. */
4273 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
4274 + gotplt
->output_offset
4276 - resolved_plt
->output_section
->vma
4277 - resolved_plt
->output_offset
4279 - htab
->plt
.plt_got_insn_size
);
4281 /* Check PC-relative offset overflow in PLT entry. */
4282 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
4283 /* xgettext:c-format */
4284 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in PLT entry for `%s'\n"),
4285 output_bfd
, h
->root
.root
.string
);
4287 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
4288 (resolved_plt
->contents
+ plt_offset
4289 + htab
->plt
.plt_got_offset
));
4291 /* Fill in the entry in the global offset table, initially this
4292 points to the second part of the PLT entry. Leave the entry
4293 as zero for undefined weak symbol in PIE. No PLT relocation
4294 against undefined weak symbol in PIE. */
4295 if (!local_undefweak
)
4297 if (htab
->plt
.has_plt0
)
4298 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4299 + plt
->output_offset
4301 + htab
->lazy_plt
->plt_lazy_offset
),
4302 gotplt
->contents
+ got_offset
);
4304 /* Fill in the entry in the .rela.plt section. */
4305 rela
.r_offset
= (gotplt
->output_section
->vma
4306 + gotplt
->output_offset
4308 if (PLT_LOCAL_IFUNC_P (info
, h
))
4310 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4311 h
->root
.root
.string
,
4312 h
->root
.u
.def
.section
->owner
);
4314 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4315 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4316 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4317 rela
.r_addend
= (h
->root
.u
.def
.value
4318 + h
->root
.u
.def
.section
->output_section
->vma
4319 + h
->root
.u
.def
.section
->output_offset
);
4321 if (htab
->params
->report_relative_reloc
)
4322 _bfd_x86_elf_link_report_relative_reloc
4323 (info
, relplt
, h
, sym
, "R_X86_64_IRELATIVE", &rela
);
4325 /* R_X86_64_IRELATIVE comes last. */
4326 plt_index
= htab
->next_irelative_index
--;
4330 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4332 plt_index
= htab
->next_jump_slot_index
++;
4335 /* Don't fill the second and third slots in PLT entry for
4336 static executables nor without PLT0. */
4337 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
4340 = h
->plt
.offset
+ htab
->lazy_plt
->plt_plt_insn_end
;
4342 /* Put relocation index. */
4343 bfd_put_32 (output_bfd
, plt_index
,
4344 (plt
->contents
+ h
->plt
.offset
4345 + htab
->lazy_plt
->plt_reloc_offset
));
4347 /* Put offset for jmp .PLT0 and check for overflow. We don't
4348 check relocation index for overflow since branch displacement
4349 will overflow first. */
4350 if (plt0_offset
> 0x80000000)
4351 /* xgettext:c-format */
4352 info
->callbacks
->einfo (_("%F%pB: branch displacement overflow in PLT entry for `%s'\n"),
4353 output_bfd
, h
->root
.root
.string
);
4354 bfd_put_32 (output_bfd
, - plt0_offset
,
4355 (plt
->contents
+ h
->plt
.offset
4356 + htab
->lazy_plt
->plt_plt_offset
));
4359 bed
= get_elf_backend_data (output_bfd
);
4360 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4361 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4364 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4366 bfd_vma got_offset
, plt_offset
;
4367 asection
*plt
, *got
;
4369 int32_t got_pcrel_offset
;
4371 /* Set the entry in the GOT procedure linkage table. */
4372 plt
= htab
->plt_got
;
4373 got
= htab
->elf
.sgot
;
4374 got_offset
= h
->got
.offset
;
4376 if (got_offset
== (bfd_vma
) -1
4377 || (h
->type
== STT_GNU_IFUNC
&& h
->def_regular
)
4382 /* Use the non-lazy PLT entry template for the GOT PLT since they
4383 are the identical. */
4384 /* Fill in the entry in the GOT procedure linkage table. */
4385 plt_offset
= eh
->plt_got
.offset
;
4386 memcpy (plt
->contents
+ plt_offset
,
4387 htab
->non_lazy_plt
->plt_entry
,
4388 htab
->non_lazy_plt
->plt_entry_size
);
4390 /* Put offset the PC-relative instruction referring to the GOT
4391 entry, subtracting the size of that instruction. */
4392 got_pcrel_offset
= (got
->output_section
->vma
4393 + got
->output_offset
4395 - plt
->output_section
->vma
4396 - plt
->output_offset
4398 - htab
->non_lazy_plt
->plt_got_insn_size
);
4400 /* Check PC-relative offset overflow in GOT PLT entry. */
4401 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
4402 if ((got_after_plt
&& got_pcrel_offset
< 0)
4403 || (!got_after_plt
&& got_pcrel_offset
> 0))
4404 /* xgettext:c-format */
4405 info
->callbacks
->einfo (_("%F%pB: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
4406 output_bfd
, h
->root
.root
.string
);
4408 bfd_put_32 (output_bfd
, got_pcrel_offset
,
4409 (plt
->contents
+ plt_offset
4410 + htab
->non_lazy_plt
->plt_got_offset
));
4413 if (!local_undefweak
4415 && (h
->plt
.offset
!= (bfd_vma
) -1
4416 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4418 /* Mark the symbol as undefined, rather than as defined in
4419 the .plt section. Leave the value if there were any
4420 relocations where pointer equality matters (this is a clue
4421 for the dynamic linker, to make function pointer
4422 comparisons work between an application and shared
4423 library), otherwise set it to zero. If a function is only
4424 called from a binary, there is no need to slow down
4425 shared libraries because of that. */
4426 sym
->st_shndx
= SHN_UNDEF
;
4427 if (!h
->pointer_equality_needed
)
4431 _bfd_x86_elf_link_fixup_ifunc_symbol (info
, htab
, h
, sym
);
4433 /* Don't generate dynamic GOT relocation against undefined weak
4434 symbol in executable. */
4435 if (h
->got
.offset
!= (bfd_vma
) -1
4436 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h
)->tls_type
)
4437 && elf_x86_hash_entry (h
)->tls_type
!= GOT_TLS_IE
4438 && !local_undefweak
)
4440 Elf_Internal_Rela rela
;
4441 asection
*relgot
= htab
->elf
.srelgot
;
4442 const char *relative_reloc_name
= NULL
;
4444 /* This symbol has an entry in the global offset table. Set it
4446 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4449 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4450 + htab
->elf
.sgot
->output_offset
4451 + (h
->got
.offset
&~ (bfd_vma
) 1));
4453 /* If this is a static link, or it is a -Bsymbolic link and the
4454 symbol is defined locally or was forced to be local because
4455 of a version file, we just want to emit a RELATIVE reloc.
4456 The entry in the global offset table will already have been
4457 initialized in the relocate_section function. */
4459 && h
->type
== STT_GNU_IFUNC
)
4461 if (h
->plt
.offset
== (bfd_vma
) -1)
4463 /* STT_GNU_IFUNC is referenced without PLT. */
4464 if (htab
->elf
.splt
== NULL
)
4466 /* use .rel[a].iplt section to store .got relocations
4467 in static executable. */
4468 relgot
= htab
->elf
.irelplt
;
4470 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4472 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
4473 h
->root
.root
.string
,
4474 h
->root
.u
.def
.section
->owner
);
4476 rela
.r_info
= htab
->r_info (0,
4477 R_X86_64_IRELATIVE
);
4478 rela
.r_addend
= (h
->root
.u
.def
.value
4479 + h
->root
.u
.def
.section
->output_section
->vma
4480 + h
->root
.u
.def
.section
->output_offset
);
4481 relative_reloc_name
= "R_X86_64_IRELATIVE";
4486 else if (bfd_link_pic (info
))
4488 /* Generate R_X86_64_GLOB_DAT. */
4496 if (!h
->pointer_equality_needed
)
4499 /* For non-shared object, we can't use .got.plt, which
4500 contains the real function addres if we need pointer
4501 equality. We load the GOT entry with the PLT entry. */
4502 if (htab
->plt_second
!= NULL
)
4504 plt
= htab
->plt_second
;
4505 plt_offset
= eh
->plt_second
.offset
;
4509 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4510 plt_offset
= h
->plt
.offset
;
4512 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4513 + plt
->output_offset
4515 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4519 else if (bfd_link_pic (info
)
4520 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4522 if (!SYMBOL_DEFINED_NON_SHARED_P (h
))
4524 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4525 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4526 rela
.r_addend
= (h
->root
.u
.def
.value
4527 + h
->root
.u
.def
.section
->output_section
->vma
4528 + h
->root
.u
.def
.section
->output_offset
);
4529 relative_reloc_name
= "R_X86_64_RELATIVE";
4533 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4535 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4536 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4537 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4541 if (relative_reloc_name
!= NULL
4542 && htab
->params
->report_relative_reloc
)
4543 _bfd_x86_elf_link_report_relative_reloc
4544 (info
, relgot
, h
, sym
, relative_reloc_name
, &rela
);
4546 elf_append_rela (output_bfd
, relgot
, &rela
);
4551 Elf_Internal_Rela rela
;
4554 /* This symbol needs a copy reloc. Set it up. */
4555 VERIFY_COPY_RELOC (h
, htab
)
4557 rela
.r_offset
= (h
->root
.u
.def
.value
4558 + h
->root
.u
.def
.section
->output_section
->vma
4559 + h
->root
.u
.def
.section
->output_offset
);
4560 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4562 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
4563 s
= htab
->elf
.sreldynrelro
;
4565 s
= htab
->elf
.srelbss
;
4566 elf_append_rela (output_bfd
, s
, &rela
);
4572 /* Finish up local dynamic symbol handling. We set the contents of
4573 various dynamic sections here. */
4576 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4578 struct elf_link_hash_entry
*h
4579 = (struct elf_link_hash_entry
*) *slot
;
4580 struct bfd_link_info
*info
4581 = (struct bfd_link_info
*) inf
;
4583 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4587 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4588 here since undefined weak symbol may not be dynamic and may not be
4589 called for elf_x86_64_finish_dynamic_symbol. */
4592 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
4595 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
4596 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
4598 if (h
->root
.type
!= bfd_link_hash_undefweak
4599 || h
->dynindx
!= -1)
4602 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4606 /* Used to decide how to sort relocs in an optimal manner for the
4607 dynamic linker, before writing them out. */
4609 static enum elf_reloc_type_class
4610 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info
,
4611 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4612 const Elf_Internal_Rela
*rela
)
4614 bfd
*abfd
= info
->output_bfd
;
4615 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4616 struct elf_x86_link_hash_table
*htab
4617 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4619 if (htab
->elf
.dynsym
!= NULL
4620 && htab
->elf
.dynsym
->contents
!= NULL
)
4622 /* Check relocation against STT_GNU_IFUNC symbol if there are
4624 unsigned long r_symndx
= htab
->r_sym (rela
->r_info
);
4625 if (r_symndx
!= STN_UNDEF
)
4627 Elf_Internal_Sym sym
;
4628 if (!bed
->s
->swap_symbol_in (abfd
,
4629 (htab
->elf
.dynsym
->contents
4630 + r_symndx
* bed
->s
->sizeof_sym
),
4634 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
4635 return reloc_class_ifunc
;
4639 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4641 case R_X86_64_IRELATIVE
:
4642 return reloc_class_ifunc
;
4643 case R_X86_64_RELATIVE
:
4644 case R_X86_64_RELATIVE64
:
4645 return reloc_class_relative
;
4646 case R_X86_64_JUMP_SLOT
:
4647 return reloc_class_plt
;
4649 return reloc_class_copy
;
4651 return reloc_class_normal
;
4655 /* Finish up the dynamic sections. */
4658 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4659 struct bfd_link_info
*info
)
4661 struct elf_x86_link_hash_table
*htab
;
4663 htab
= _bfd_x86_elf_finish_dynamic_sections (output_bfd
, info
);
4667 if (! htab
->elf
.dynamic_sections_created
)
4670 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4672 elf_section_data (htab
->elf
.splt
->output_section
)
4673 ->this_hdr
.sh_entsize
= htab
->plt
.plt_entry_size
;
4675 if (htab
->plt
.has_plt0
)
4677 /* Fill in the special first entry in the procedure linkage
4679 memcpy (htab
->elf
.splt
->contents
,
4680 htab
->lazy_plt
->plt0_entry
,
4681 htab
->lazy_plt
->plt0_entry_size
);
4682 /* Add offset for pushq GOT+8(%rip), since the instruction
4683 uses 6 bytes subtract this value. */
4684 bfd_put_32 (output_bfd
,
4685 (htab
->elf
.sgotplt
->output_section
->vma
4686 + htab
->elf
.sgotplt
->output_offset
4688 - htab
->elf
.splt
->output_section
->vma
4689 - htab
->elf
.splt
->output_offset
4691 (htab
->elf
.splt
->contents
4692 + htab
->lazy_plt
->plt0_got1_offset
));
4693 /* Add offset for the PC-relative instruction accessing
4694 GOT+16, subtracting the offset to the end of that
4696 bfd_put_32 (output_bfd
,
4697 (htab
->elf
.sgotplt
->output_section
->vma
4698 + htab
->elf
.sgotplt
->output_offset
4700 - htab
->elf
.splt
->output_section
->vma
4701 - htab
->elf
.splt
->output_offset
4702 - htab
->lazy_plt
->plt0_got2_insn_end
),
4703 (htab
->elf
.splt
->contents
4704 + htab
->lazy_plt
->plt0_got2_offset
));
4707 if (htab
->elf
.tlsdesc_plt
)
4709 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4710 htab
->elf
.sgot
->contents
+ htab
->elf
.tlsdesc_got
);
4712 memcpy (htab
->elf
.splt
->contents
+ htab
->elf
.tlsdesc_plt
,
4713 htab
->lazy_plt
->plt_tlsdesc_entry
,
4714 htab
->lazy_plt
->plt_tlsdesc_entry_size
);
4716 /* Add offset for pushq GOT+8(%rip), since ENDBR64 uses 4
4717 bytes and the instruction uses 6 bytes, subtract these
4719 bfd_put_32 (output_bfd
,
4720 (htab
->elf
.sgotplt
->output_section
->vma
4721 + htab
->elf
.sgotplt
->output_offset
4723 - htab
->elf
.splt
->output_section
->vma
4724 - htab
->elf
.splt
->output_offset
4725 - htab
->elf
.tlsdesc_plt
4726 - htab
->lazy_plt
->plt_tlsdesc_got1_insn_end
),
4727 (htab
->elf
.splt
->contents
4728 + htab
->elf
.tlsdesc_plt
4729 + htab
->lazy_plt
->plt_tlsdesc_got1_offset
));
4730 /* Add offset for indirect branch via GOT+TDG, where TDG
4731 stands for htab->tlsdesc_got, subtracting the offset
4732 to the end of that instruction. */
4733 bfd_put_32 (output_bfd
,
4734 (htab
->elf
.sgot
->output_section
->vma
4735 + htab
->elf
.sgot
->output_offset
4736 + htab
->elf
.tlsdesc_got
4737 - htab
->elf
.splt
->output_section
->vma
4738 - htab
->elf
.splt
->output_offset
4739 - htab
->elf
.tlsdesc_plt
4740 - htab
->lazy_plt
->plt_tlsdesc_got2_insn_end
),
4741 (htab
->elf
.splt
->contents
4742 + htab
->elf
.tlsdesc_plt
4743 + htab
->lazy_plt
->plt_tlsdesc_got2_offset
));
4747 /* Fill PLT entries for undefined weak symbols in PIE. */
4748 if (bfd_link_pie (info
))
4749 bfd_hash_traverse (&info
->hash
->table
,
4750 elf_x86_64_pie_finish_undefweak_symbol
,
4756 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4757 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4758 It has to be done before elf_link_sort_relocs is called so that
4759 dynamic relocations are properly sorted. */
4762 elf_x86_64_output_arch_local_syms
4763 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4764 struct bfd_link_info
*info
,
4765 void *flaginfo ATTRIBUTE_UNUSED
,
4766 int (*func
) (void *, const char *,
4769 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
4771 struct elf_x86_link_hash_table
*htab
4772 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4776 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4777 htab_traverse (htab
->loc_hash_table
,
4778 elf_x86_64_finish_local_dynamic_symbol
,
4784 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4785 dynamic relocations. */
4788 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
4789 long symcount ATTRIBUTE_UNUSED
,
4790 asymbol
**syms ATTRIBUTE_UNUSED
,
4797 bfd_byte
*plt_contents
;
4799 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
4800 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
4801 const struct elf_x86_lazy_plt_layout
*lazy_bnd_plt
;
4802 const struct elf_x86_non_lazy_plt_layout
*non_lazy_bnd_plt
;
4803 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
4804 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
4806 enum elf_x86_plt_type plt_type
;
4807 struct elf_x86_plt plts
[] =
4809 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
4810 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
4811 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4812 { ".plt.bnd", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4813 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
4818 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
4821 if (dynsymcount
<= 0)
4824 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
4828 lazy_plt
= &elf_x86_64_lazy_plt
;
4829 non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
4830 lazy_bnd_plt
= &elf_x86_64_lazy_bnd_plt
;
4831 non_lazy_bnd_plt
= &elf_x86_64_non_lazy_bnd_plt
;
4832 if (ABI_64_P (abfd
))
4834 lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
4835 non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
4839 lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
4840 non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
4844 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
4846 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
4847 if (plt
== NULL
|| plt
->size
== 0)
4850 /* Get the PLT section contents. */
4851 if (!bfd_malloc_and_get_section (abfd
, plt
, &plt_contents
))
4854 /* Check what kind of PLT it is. */
4855 plt_type
= plt_unknown
;
4856 if (plts
[j
].type
== plt_unknown
4857 && (plt
->size
>= (lazy_plt
->plt_entry_size
4858 + lazy_plt
->plt_entry_size
)))
4860 /* Match lazy PLT first. Need to check the first two
4862 if ((memcmp (plt_contents
, lazy_plt
->plt0_entry
,
4863 lazy_plt
->plt0_got1_offset
) == 0)
4864 && (memcmp (plt_contents
+ 6, lazy_plt
->plt0_entry
+ 6,
4866 plt_type
= plt_lazy
;
4867 else if (lazy_bnd_plt
!= NULL
4868 && (memcmp (plt_contents
, lazy_bnd_plt
->plt0_entry
,
4869 lazy_bnd_plt
->plt0_got1_offset
) == 0)
4870 && (memcmp (plt_contents
+ 6,
4871 lazy_bnd_plt
->plt0_entry
+ 6, 3) == 0))
4873 plt_type
= plt_lazy
| plt_second
;
4874 /* The fist entry in the lazy IBT PLT is the same as the
4876 if ((memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
4877 lazy_ibt_plt
->plt_entry
,
4878 lazy_ibt_plt
->plt_got_offset
) == 0))
4879 lazy_plt
= lazy_ibt_plt
;
4881 lazy_plt
= lazy_bnd_plt
;
4885 if (non_lazy_plt
!= NULL
4886 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
4887 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
4889 /* Match non-lazy PLT. */
4890 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
4891 non_lazy_plt
->plt_got_offset
) == 0)
4892 plt_type
= plt_non_lazy
;
4895 if (plt_type
== plt_unknown
|| plt_type
== plt_second
)
4897 if (non_lazy_bnd_plt
!= NULL
4898 && plt
->size
>= non_lazy_bnd_plt
->plt_entry_size
4899 && (memcmp (plt_contents
, non_lazy_bnd_plt
->plt_entry
,
4900 non_lazy_bnd_plt
->plt_got_offset
) == 0))
4902 /* Match BND PLT. */
4903 plt_type
= plt_second
;
4904 non_lazy_plt
= non_lazy_bnd_plt
;
4906 else if (non_lazy_ibt_plt
!= NULL
4907 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
4908 && (memcmp (plt_contents
,
4909 non_lazy_ibt_plt
->plt_entry
,
4910 non_lazy_ibt_plt
->plt_got_offset
) == 0))
4912 /* Match IBT PLT. */
4913 plt_type
= plt_second
;
4914 non_lazy_plt
= non_lazy_ibt_plt
;
4918 if (plt_type
== plt_unknown
)
4920 free (plt_contents
);
4925 plts
[j
].type
= plt_type
;
4927 if ((plt_type
& plt_lazy
))
4929 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
4930 plts
[j
].plt_got_insn_size
= lazy_plt
->plt_got_insn_size
;
4931 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
4932 /* Skip PLT0 in lazy PLT. */
4937 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
4938 plts
[j
].plt_got_insn_size
= non_lazy_plt
->plt_got_insn_size
;
4939 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
4943 /* Skip lazy PLT when the second PLT is used. */
4944 if (plt_type
== (plt_lazy
| plt_second
))
4948 n
= plt
->size
/ plts
[j
].plt_entry_size
;
4953 plts
[j
].contents
= plt_contents
;
4956 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
4957 (bfd_vma
) 0, plts
, dynsyms
,
4961 /* Handle an x86-64 specific section when reading an object file. This
4962 is called when elfcode.h finds a section with an unknown type. */
4965 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
4966 const char *name
, int shindex
)
4968 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4971 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4977 /* Hook called by the linker routine which adds symbols from an object
4978 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4982 elf_x86_64_add_symbol_hook (bfd
*abfd
,
4983 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4984 Elf_Internal_Sym
*sym
,
4985 const char **namep ATTRIBUTE_UNUSED
,
4986 flagword
*flagsp ATTRIBUTE_UNUSED
,
4992 switch (sym
->st_shndx
)
4994 case SHN_X86_64_LCOMMON
:
4995 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
4998 lcomm
= bfd_make_section_with_flags (abfd
,
5002 | SEC_LINKER_CREATED
));
5005 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5008 *valp
= sym
->st_size
;
5016 /* Given a BFD section, try to locate the corresponding ELF section
5020 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5021 asection
*sec
, int *index_return
)
5023 if (sec
== &_bfd_elf_large_com_section
)
5025 *index_return
= SHN_X86_64_LCOMMON
;
5031 /* Process a symbol. */
5034 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5037 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5039 switch (elfsym
->internal_elf_sym
.st_shndx
)
5041 case SHN_X86_64_LCOMMON
:
5042 asym
->section
= &_bfd_elf_large_com_section
;
5043 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5044 /* Common symbol doesn't set BSF_GLOBAL. */
5045 asym
->flags
&= ~BSF_GLOBAL
;
5051 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5053 return (sym
->st_shndx
== SHN_COMMON
5054 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5058 elf_x86_64_common_section_index (asection
*sec
)
5060 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5063 return SHN_X86_64_LCOMMON
;
5067 elf_x86_64_common_section (asection
*sec
)
5069 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5070 return bfd_com_section_ptr
;
5072 return &_bfd_elf_large_com_section
;
5076 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5077 const Elf_Internal_Sym
*sym
,
5082 const asection
*oldsec
)
5084 /* A normal common symbol and a large common symbol result in a
5085 normal common symbol. We turn the large common symbol into a
5088 && h
->root
.type
== bfd_link_hash_common
5090 && bfd_is_com_section (*psec
)
5093 if (sym
->st_shndx
== SHN_COMMON
5094 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5096 h
->root
.u
.c
.p
->section
5097 = bfd_make_section_old_way (oldbfd
, "COMMON");
5098 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5100 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5101 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5102 *psec
= bfd_com_section_ptr
;
5109 elf_x86_64_additional_program_headers (bfd
*abfd
,
5110 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5115 /* Check to see if we need a large readonly segment. */
5116 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5117 if (s
&& (s
->flags
& SEC_LOAD
))
5120 /* Check to see if we need a large data segment. Since .lbss sections
5121 is placed right after the .bss section, there should be no need for
5122 a large data segment just because of .lbss. */
5123 s
= bfd_get_section_by_name (abfd
, ".ldata");
5124 if (s
&& (s
->flags
& SEC_LOAD
))
5130 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5133 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5134 const bfd_target
*output
)
5136 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5137 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5138 && _bfd_elf_relocs_compatible (input
, output
));
5141 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
5142 with GNU properties if found. Otherwise, return NULL. */
5145 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info
*info
)
5147 struct elf_x86_init_table init_table
;
5148 const struct elf_backend_data
*bed
;
5149 struct elf_x86_link_hash_table
*htab
;
5151 if ((int) R_X86_64_standard
>= (int) R_X86_64_converted_reloc_bit
5152 || (int) R_X86_64_max
<= (int) R_X86_64_converted_reloc_bit
5153 || ((int) (R_X86_64_GNU_VTINHERIT
| R_X86_64_converted_reloc_bit
)
5154 != (int) R_X86_64_GNU_VTINHERIT
)
5155 || ((int) (R_X86_64_GNU_VTENTRY
| R_X86_64_converted_reloc_bit
)
5156 != (int) R_X86_64_GNU_VTENTRY
))
5159 /* This is unused for x86-64. */
5160 init_table
.plt0_pad_byte
= 0x90;
5162 bed
= get_elf_backend_data (info
->output_bfd
);
5163 htab
= elf_x86_hash_table (info
, bed
->target_id
);
5166 if (htab
->params
->bndplt
)
5168 init_table
.lazy_plt
= &elf_x86_64_lazy_bnd_plt
;
5169 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_bnd_plt
;
5173 init_table
.lazy_plt
= &elf_x86_64_lazy_plt
;
5174 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
5177 if (ABI_64_P (info
->output_bfd
))
5179 init_table
.lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
5180 init_table
.non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
5184 init_table
.lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
5185 init_table
.non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
5188 if (ABI_64_P (info
->output_bfd
))
5190 init_table
.r_info
= elf64_r_info
;
5191 init_table
.r_sym
= elf64_r_sym
;
5195 init_table
.r_info
= elf32_r_info
;
5196 init_table
.r_sym
= elf32_r_sym
;
5199 return _bfd_x86_elf_link_setup_gnu_properties (info
, &init_table
);
5202 static const struct bfd_elf_special_section
5203 elf_x86_64_special_sections
[]=
5205 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5206 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5207 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5208 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5209 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5210 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5211 { NULL
, 0, 0, 0, 0 }
5214 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5215 #define TARGET_LITTLE_NAME "elf64-x86-64"
5216 #define ELF_ARCH bfd_arch_i386
5217 #define ELF_TARGET_ID X86_64_ELF_DATA
5218 #define ELF_MACHINE_CODE EM_X86_64
5219 #if DEFAULT_LD_Z_SEPARATE_CODE
5220 # define ELF_MAXPAGESIZE 0x1000
5222 # define ELF_MAXPAGESIZE 0x200000
5224 #define ELF_MINPAGESIZE 0x1000
5225 #define ELF_COMMONPAGESIZE 0x1000
5227 #define elf_backend_can_gc_sections 1
5228 #define elf_backend_can_refcount 1
5229 #define elf_backend_want_got_plt 1
5230 #define elf_backend_plt_readonly 1
5231 #define elf_backend_want_plt_sym 0
5232 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5233 #define elf_backend_rela_normal 1
5234 #define elf_backend_plt_alignment 4
5235 #define elf_backend_extern_protected_data 1
5236 #define elf_backend_caches_rawsize 1
5237 #define elf_backend_dtrel_excludes_plt 1
5238 #define elf_backend_want_dynrelro 1
5240 #define elf_info_to_howto elf_x86_64_info_to_howto
5242 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5243 #define bfd_elf64_bfd_reloc_name_lookup \
5244 elf_x86_64_reloc_name_lookup
5246 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5247 #define elf_backend_check_relocs elf_x86_64_check_relocs
5248 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5249 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5250 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5251 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
5252 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5253 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5255 #define elf_backend_write_core_note elf_x86_64_write_core_note
5257 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5258 #define elf_backend_relocate_section elf_x86_64_relocate_section
5259 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5260 #define elf_backend_object_p elf64_x86_64_elf_object_p
5261 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5263 #define elf_backend_section_from_shdr \
5264 elf_x86_64_section_from_shdr
5266 #define elf_backend_section_from_bfd_section \
5267 elf_x86_64_elf_section_from_bfd_section
5268 #define elf_backend_add_symbol_hook \
5269 elf_x86_64_add_symbol_hook
5270 #define elf_backend_symbol_processing \
5271 elf_x86_64_symbol_processing
5272 #define elf_backend_common_section_index \
5273 elf_x86_64_common_section_index
5274 #define elf_backend_common_section \
5275 elf_x86_64_common_section
5276 #define elf_backend_common_definition \
5277 elf_x86_64_common_definition
5278 #define elf_backend_merge_symbol \
5279 elf_x86_64_merge_symbol
5280 #define elf_backend_special_sections \
5281 elf_x86_64_special_sections
5282 #define elf_backend_additional_program_headers \
5283 elf_x86_64_additional_program_headers
5284 #define elf_backend_setup_gnu_properties \
5285 elf_x86_64_link_setup_gnu_properties
5286 #define elf_backend_hide_symbol \
5287 _bfd_x86_elf_hide_symbol
5290 #define elf64_bed elf64_x86_64_bed
5292 #include "elf64-target.h"
5294 /* CloudABI support. */
5296 #undef TARGET_LITTLE_SYM
5297 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5298 #undef TARGET_LITTLE_NAME
5299 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5302 #define ELF_OSABI ELFOSABI_CLOUDABI
5305 #define elf64_bed elf64_x86_64_cloudabi_bed
5307 #include "elf64-target.h"
5309 /* FreeBSD support. */
5311 #undef TARGET_LITTLE_SYM
5312 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5313 #undef TARGET_LITTLE_NAME
5314 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5317 #define ELF_OSABI ELFOSABI_FREEBSD
5320 #define elf64_bed elf64_x86_64_fbsd_bed
5322 #include "elf64-target.h"
5324 /* Solaris 2 support. */
5326 #undef TARGET_LITTLE_SYM
5327 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5328 #undef TARGET_LITTLE_NAME
5329 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5331 #undef ELF_TARGET_OS
5332 #define ELF_TARGET_OS is_solaris
5334 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5335 objects won't be recognized. */
5339 #define elf64_bed elf64_x86_64_sol2_bed
5341 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5343 #undef elf_backend_static_tls_alignment
5344 #define elf_backend_static_tls_alignment 16
5346 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5348 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5350 #undef elf_backend_want_plt_sym
5351 #define elf_backend_want_plt_sym 1
5353 #undef elf_backend_strtab_flags
5354 #define elf_backend_strtab_flags SHF_STRINGS
5357 elf64_x86_64_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
5358 bfd
*obfd ATTRIBUTE_UNUSED
,
5359 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
5360 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
5362 /* PR 19938: FIXME: Need to add code for setting the sh_info
5363 and sh_link fields of Solaris specific section types. */
5367 #undef elf_backend_copy_special_section_fields
5368 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
5370 #include "elf64-target.h"
5372 /* Restore defaults. */
5374 #undef elf_backend_static_tls_alignment
5375 #undef elf_backend_want_plt_sym
5376 #define elf_backend_want_plt_sym 0
5377 #undef elf_backend_strtab_flags
5378 #undef elf_backend_copy_special_section_fields
5380 /* Intel L1OM support. */
5383 elf64_l1om_elf_object_p (bfd
*abfd
)
5385 /* Set the right machine number for an L1OM elf64 file. */
5386 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5390 #undef TARGET_LITTLE_SYM
5391 #define TARGET_LITTLE_SYM l1om_elf64_vec
5392 #undef TARGET_LITTLE_NAME
5393 #define TARGET_LITTLE_NAME "elf64-l1om"
5395 #define ELF_ARCH bfd_arch_l1om
5397 #undef ELF_MACHINE_CODE
5398 #define ELF_MACHINE_CODE EM_L1OM
5403 #define elf64_bed elf64_l1om_bed
5405 #undef elf_backend_object_p
5406 #define elf_backend_object_p elf64_l1om_elf_object_p
5408 /* Restore defaults. */
5409 #undef ELF_MAXPAGESIZE
5410 #undef ELF_MINPAGESIZE
5411 #undef ELF_COMMONPAGESIZE
5412 #if DEFAULT_LD_Z_SEPARATE_CODE
5413 # define ELF_MAXPAGESIZE 0x1000
5415 # define ELF_MAXPAGESIZE 0x200000
5417 #define ELF_MINPAGESIZE 0x1000
5418 #define ELF_COMMONPAGESIZE 0x1000
5419 #undef elf_backend_plt_alignment
5420 #define elf_backend_plt_alignment 4
5421 #undef ELF_TARGET_OS
5423 #include "elf64-target.h"
5425 /* FreeBSD L1OM support. */
5427 #undef TARGET_LITTLE_SYM
5428 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5429 #undef TARGET_LITTLE_NAME
5430 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5433 #define ELF_OSABI ELFOSABI_FREEBSD
5436 #define elf64_bed elf64_l1om_fbsd_bed
5438 #include "elf64-target.h"
5440 /* Intel K1OM support. */
5443 elf64_k1om_elf_object_p (bfd
*abfd
)
5445 /* Set the right machine number for an K1OM elf64 file. */
5446 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5450 #undef TARGET_LITTLE_SYM
5451 #define TARGET_LITTLE_SYM k1om_elf64_vec
5452 #undef TARGET_LITTLE_NAME
5453 #define TARGET_LITTLE_NAME "elf64-k1om"
5455 #define ELF_ARCH bfd_arch_k1om
5457 #undef ELF_MACHINE_CODE
5458 #define ELF_MACHINE_CODE EM_K1OM
5463 #define elf64_bed elf64_k1om_bed
5465 #undef elf_backend_object_p
5466 #define elf_backend_object_p elf64_k1om_elf_object_p
5468 #include "elf64-target.h"
5470 /* FreeBSD K1OM support. */
5472 #undef TARGET_LITTLE_SYM
5473 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
5474 #undef TARGET_LITTLE_NAME
5475 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5478 #define ELF_OSABI ELFOSABI_FREEBSD
5481 #define elf64_bed elf64_k1om_fbsd_bed
5483 #include "elf64-target.h"
5485 /* 32bit x86-64 support. */
5487 #undef TARGET_LITTLE_SYM
5488 #define TARGET_LITTLE_SYM x86_64_elf32_vec
5489 #undef TARGET_LITTLE_NAME
5490 #define TARGET_LITTLE_NAME "elf32-x86-64"
5492 #define elf32_bed elf32_x86_64_bed
5495 #define ELF_ARCH bfd_arch_i386
5497 #undef ELF_MACHINE_CODE
5498 #define ELF_MACHINE_CODE EM_X86_64
5502 #define bfd_elf32_bfd_reloc_type_lookup \
5503 elf_x86_64_reloc_type_lookup
5504 #define bfd_elf32_bfd_reloc_name_lookup \
5505 elf_x86_64_reloc_name_lookup
5506 #define bfd_elf32_get_synthetic_symtab \
5507 elf_x86_64_get_synthetic_symtab
5509 #undef elf_backend_object_p
5510 #define elf_backend_object_p \
5511 elf32_x86_64_elf_object_p
5513 #undef elf_backend_bfd_from_remote_memory
5514 #define elf_backend_bfd_from_remote_memory \
5515 _bfd_elf32_bfd_from_remote_memory
5517 #undef elf_backend_size_info
5518 #define elf_backend_size_info \
5519 _bfd_elf32_size_info
5521 #include "elf32-target.h"