1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka <jh@suse.cz>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
22 #include "elfxx-x86.h"
25 #include "libiberty.h"
27 #include "opcode/i386.h"
28 #include "elf/x86-64.h"
35 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
36 #define MINUS_ONE (~ (bfd_vma) 0)
38 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
39 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
40 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
41 since they are the same. */
43 /* The relocation "howto" table. Order of fields:
44 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
45 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
46 static reloc_howto_type x86_64_elf_howto_table
[] =
48 HOWTO(R_X86_64_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
49 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
51 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
52 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
54 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
55 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
57 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
58 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
60 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
61 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
63 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
64 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
66 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
67 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
69 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
70 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
72 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
73 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
75 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
76 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
78 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
79 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
81 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
82 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
84 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
85 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
86 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
87 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
88 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
90 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
91 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
92 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
93 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
95 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
98 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
99 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
101 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
102 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
104 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
105 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
107 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
108 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
110 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
111 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
113 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
114 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
116 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
117 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
119 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
121 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
122 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
123 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
124 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
125 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
126 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
128 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
129 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
131 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
132 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
133 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
134 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
135 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
137 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
138 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
140 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
141 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", FALSE
, 0xffffffff, 0xffffffff,
143 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, FALSE
, 0, complain_overflow_unsigned
,
144 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", FALSE
, MINUS_ONE
, MINUS_ONE
,
146 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
147 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
148 "R_X86_64_GOTPC32_TLSDESC",
149 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
150 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
151 complain_overflow_dont
, bfd_elf_generic_reloc
,
152 "R_X86_64_TLSDESC_CALL",
154 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
155 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
157 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
158 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
159 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
161 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
162 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
164 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
165 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", FALSE
, 0xffffffff, 0xffffffff,
167 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
168 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", FALSE
, 0xffffffff, 0xffffffff,
170 HOWTO(R_X86_64_GOTPCRELX
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
171 bfd_elf_generic_reloc
, "R_X86_64_GOTPCRELX", FALSE
, 0xffffffff,
173 HOWTO(R_X86_64_REX_GOTPCRELX
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
174 bfd_elf_generic_reloc
, "R_X86_64_REX_GOTPCRELX", FALSE
, 0xffffffff,
177 /* We have a gap in the reloc numbers here.
178 R_X86_64_standard counts the number up to this point, and
179 R_X86_64_vt_offset is the value to subtract from a reloc type of
180 R_X86_64_GNU_VT* to form an index into this table. */
181 #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
182 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
184 /* GNU extension to record C++ vtable hierarchy. */
185 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
186 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
188 /* GNU extension to record C++ vtable member usage. */
189 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
190 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
193 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
194 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
195 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
199 /* Set if a relocation is converted from a GOTPCREL relocation. */
200 #define R_X86_64_converted_reloc_bit (1 << 7)
202 #define IS_X86_64_PCREL_TYPE(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
206 || ((TYPE) == R_X86_64_PC32_BND) \
207 || ((TYPE) == R_X86_64_PC64))
209 /* Map BFD relocs to the x86_64 elf relocs. */
212 bfd_reloc_code_real_type bfd_reloc_val
;
213 unsigned char elf_reloc_val
;
216 static const struct elf_reloc_map x86_64_reloc_map
[] =
218 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
219 { BFD_RELOC_64
, R_X86_64_64
, },
220 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
221 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
222 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
223 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
224 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
225 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
226 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
227 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
228 { BFD_RELOC_32
, R_X86_64_32
, },
229 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
230 { BFD_RELOC_16
, R_X86_64_16
, },
231 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
232 { BFD_RELOC_8
, R_X86_64_8
, },
233 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
234 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
235 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
236 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
237 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
238 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
239 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
240 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
241 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
242 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
243 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
244 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
245 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
246 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
247 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
248 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
249 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
250 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
251 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
252 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
253 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
254 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
255 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
256 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
, },
257 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
, },
258 { BFD_RELOC_X86_64_GOTPCRELX
, R_X86_64_GOTPCRELX
, },
259 { BFD_RELOC_X86_64_REX_GOTPCRELX
, R_X86_64_REX_GOTPCRELX
, },
260 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
261 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
264 static reloc_howto_type
*
265 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
269 if (r_type
== (unsigned int) R_X86_64_32
)
274 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
276 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
277 || r_type
>= (unsigned int) R_X86_64_max
)
279 if (r_type
>= (unsigned int) R_X86_64_standard
)
281 /* xgettext:c-format */
282 _bfd_error_handler (_("%B: invalid relocation type %d"),
284 r_type
= R_X86_64_NONE
;
289 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
290 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
291 return &x86_64_elf_howto_table
[i
];
294 /* Given a BFD reloc type, return a HOWTO structure. */
295 static reloc_howto_type
*
296 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
297 bfd_reloc_code_real_type code
)
301 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
304 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
305 return elf_x86_64_rtype_to_howto (abfd
,
306 x86_64_reloc_map
[i
].elf_reloc_val
);
311 static reloc_howto_type
*
312 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
317 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
319 /* Get x32 R_X86_64_32. */
320 reloc_howto_type
*reloc
321 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
322 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
326 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
327 if (x86_64_elf_howto_table
[i
].name
!= NULL
328 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
329 return &x86_64_elf_howto_table
[i
];
334 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
337 elf_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
338 Elf_Internal_Rela
*dst
)
342 r_type
= ELF32_R_TYPE (dst
->r_info
);
343 if (r_type
!= (unsigned int) R_X86_64_GNU_VTINHERIT
344 && r_type
!= (unsigned int) R_X86_64_GNU_VTENTRY
)
345 r_type
&= ~R_X86_64_converted_reloc_bit
;
346 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
348 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
|| cache_ptr
->howto
->type
== R_X86_64_NONE
);
351 /* Support for core dump NOTE sections. */
353 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
358 switch (note
->descsz
)
363 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
365 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
368 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
376 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
378 elf_tdata (abfd
)->core
->signal
379 = bfd_get_16 (abfd
, note
->descdata
+ 12);
382 elf_tdata (abfd
)->core
->lwpid
383 = bfd_get_32 (abfd
, note
->descdata
+ 32);
392 /* Make a ".reg/999" section. */
393 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
394 size
, note
->descpos
+ offset
);
398 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
400 switch (note
->descsz
)
405 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
406 elf_tdata (abfd
)->core
->pid
407 = bfd_get_32 (abfd
, note
->descdata
+ 12);
408 elf_tdata (abfd
)->core
->program
409 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
410 elf_tdata (abfd
)->core
->command
411 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
414 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
415 elf_tdata (abfd
)->core
->pid
416 = bfd_get_32 (abfd
, note
->descdata
+ 24);
417 elf_tdata (abfd
)->core
->program
418 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
419 elf_tdata (abfd
)->core
->command
420 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
423 /* Note that for some reason, a spurious space is tacked
424 onto the end of the args in some (at least one anyway)
425 implementations, so strip it off if it exists. */
428 char *command
= elf_tdata (abfd
)->core
->command
;
429 int n
= strlen (command
);
431 if (0 < n
&& command
[n
- 1] == ' ')
432 command
[n
- 1] = '\0';
440 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
443 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
445 const char *fname
, *psargs
;
456 va_start (ap
, note_type
);
457 fname
= va_arg (ap
, const char *);
458 psargs
= va_arg (ap
, const char *);
461 if (bed
->s
->elfclass
== ELFCLASS32
)
464 memset (&data
, 0, sizeof (data
));
465 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
466 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
467 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
468 &data
, sizeof (data
));
473 memset (&data
, 0, sizeof (data
));
474 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
475 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
476 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
477 &data
, sizeof (data
));
482 va_start (ap
, note_type
);
483 pid
= va_arg (ap
, long);
484 cursig
= va_arg (ap
, int);
485 gregs
= va_arg (ap
, const void *);
488 if (bed
->s
->elfclass
== ELFCLASS32
)
490 if (bed
->elf_machine_code
== EM_X86_64
)
492 prstatusx32_t prstat
;
493 memset (&prstat
, 0, sizeof (prstat
));
495 prstat
.pr_cursig
= cursig
;
496 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
497 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
498 &prstat
, sizeof (prstat
));
503 memset (&prstat
, 0, sizeof (prstat
));
505 prstat
.pr_cursig
= cursig
;
506 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
507 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
508 &prstat
, sizeof (prstat
));
514 memset (&prstat
, 0, sizeof (prstat
));
516 prstat
.pr_cursig
= cursig
;
517 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
518 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
519 &prstat
, sizeof (prstat
));
526 /* Functions for the x86-64 ELF linker. */
528 /* The size in bytes of an entry in the global offset table. */
530 #define GOT_ENTRY_SIZE 8
532 /* The size in bytes of an entry in the lazy procedure linkage table. */
534 #define LAZY_PLT_ENTRY_SIZE 16
536 /* The size in bytes of an entry in the non-lazy procedure linkage
539 #define NON_LAZY_PLT_ENTRY_SIZE 8
541 /* The first entry in a lazy procedure linkage table looks like this.
542 See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this
545 static const bfd_byte elf_x86_64_lazy_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
547 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
548 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
549 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
552 /* Subsequent entries in a lazy procedure linkage table look like this. */
554 static const bfd_byte elf_x86_64_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
556 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
557 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
558 0x68, /* pushq immediate */
559 0, 0, 0, 0, /* replaced with index into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
564 /* The first entry in a lazy procedure linkage table with BND prefix
567 static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
569 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
570 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
571 0x0f, 0x1f, 0 /* nopl (%rax) */
574 /* Subsequent entries for branches with BND prefx in a lazy procedure
575 linkage table look like this. */
577 static const bfd_byte elf_x86_64_lazy_bnd_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
579 0x68, 0, 0, 0, 0, /* pushq immediate */
580 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
581 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
584 /* The first entry in the IBT-enabled lazy procedure linkage table is the
585 the same as the lazy PLT with BND prefix so that bound registers are
586 preserved when control is passed to dynamic linker. Subsequent
587 entries for a IBT-enabled lazy procedure linkage table look like
590 static const bfd_byte elf_x86_64_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
592 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
593 0x68, 0, 0, 0, 0, /* pushq immediate */
594 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
598 /* The first entry in the x32 IBT-enabled lazy procedure linkage table
599 is the same as the normal lazy PLT. Subsequent entries for an
600 x32 IBT-enabled lazy procedure linkage table look like this. */
602 static const bfd_byte elf_x32_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
604 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
605 0x68, 0, 0, 0, 0, /* pushq immediate */
606 0xe9, 0, 0, 0, 0, /* jmpq relative */
607 0x66, 0x90 /* xchg %ax,%ax */
610 /* Entries in the non-lazey procedure linkage table look like this. */
612 static const bfd_byte elf_x86_64_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
614 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
615 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
616 0x66, 0x90 /* xchg %ax,%ax */
619 /* Entries for branches with BND prefix in the non-lazey procedure
620 linkage table look like this. */
622 static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
624 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
625 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
629 /* Entries for branches with IBT-enabled in the non-lazey procedure
630 linkage table look like this. They have the same size as the lazy
633 static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
635 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
636 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
637 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
638 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */
641 /* Entries for branches with IBT-enabled in the x32 non-lazey procedure
642 linkage table look like this. They have the same size as the lazy
645 static const bfd_byte elf_x32_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
647 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
648 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
649 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
650 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
653 /* .eh_frame covering the lazy .plt section. */
655 static const bfd_byte elf_x86_64_eh_frame_lazy_plt
[] =
657 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
658 0, 0, 0, 0, /* CIE ID */
660 'z', 'R', 0, /* Augmentation string */
661 1, /* Code alignment factor */
662 0x78, /* Data alignment factor */
663 16, /* Return address column */
664 1, /* Augmentation size */
665 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
666 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
667 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
668 DW_CFA_nop
, DW_CFA_nop
,
670 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
671 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
672 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
673 0, 0, 0, 0, /* .plt size goes here */
674 0, /* Augmentation size */
675 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
676 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
677 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
678 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
679 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
680 11, /* Block length */
681 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
682 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
683 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
684 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
685 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
688 /* .eh_frame covering the lazy BND .plt section. */
690 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt
[] =
692 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
693 0, 0, 0, 0, /* CIE ID */
695 'z', 'R', 0, /* Augmentation string */
696 1, /* Code alignment factor */
697 0x78, /* Data alignment factor */
698 16, /* Return address column */
699 1, /* Augmentation size */
700 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
701 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
702 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
703 DW_CFA_nop
, DW_CFA_nop
,
705 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
706 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
707 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
708 0, 0, 0, 0, /* .plt size goes here */
709 0, /* Augmentation size */
710 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
711 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
712 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
713 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
714 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
715 11, /* Block length */
716 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
717 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
718 DW_OP_lit15
, DW_OP_and
, DW_OP_lit5
, DW_OP_ge
,
719 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
720 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
723 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
725 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt
[] =
727 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
728 0, 0, 0, 0, /* CIE ID */
730 'z', 'R', 0, /* Augmentation string */
731 1, /* Code alignment factor */
732 0x78, /* Data alignment factor */
733 16, /* Return address column */
734 1, /* Augmentation size */
735 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
736 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
737 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
738 DW_CFA_nop
, DW_CFA_nop
,
740 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
741 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
742 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
743 0, 0, 0, 0, /* .plt size goes here */
744 0, /* Augmentation size */
745 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
746 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
747 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
748 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
749 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
750 11, /* Block length */
751 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
752 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
753 DW_OP_lit15
, DW_OP_and
, DW_OP_lit10
, DW_OP_ge
,
754 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
755 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
758 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
760 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt
[] =
762 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
763 0, 0, 0, 0, /* CIE ID */
765 'z', 'R', 0, /* Augmentation string */
766 1, /* Code alignment factor */
767 0x78, /* Data alignment factor */
768 16, /* Return address column */
769 1, /* Augmentation size */
770 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
771 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
772 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
773 DW_CFA_nop
, DW_CFA_nop
,
775 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
776 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
777 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
778 0, 0, 0, 0, /* .plt size goes here */
779 0, /* Augmentation size */
780 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
781 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
782 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
783 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
784 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
785 11, /* Block length */
786 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
787 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
788 DW_OP_lit15
, DW_OP_and
, DW_OP_lit9
, DW_OP_ge
,
789 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
790 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
793 /* .eh_frame covering the non-lazy .plt section. */
795 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt
[] =
797 #define PLT_GOT_FDE_LENGTH 20
798 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
799 0, 0, 0, 0, /* CIE ID */
801 'z', 'R', 0, /* Augmentation string */
802 1, /* Code alignment factor */
803 0x78, /* Data alignment factor */
804 16, /* Return address column */
805 1, /* Augmentation size */
806 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
807 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
808 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
809 DW_CFA_nop
, DW_CFA_nop
,
811 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
812 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
813 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
814 0, 0, 0, 0, /* non-lazy .plt size goes here */
815 0, /* Augmentation size */
816 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
,
817 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
820 /* Architecture-specific backend data for x86-64. */
822 struct elf_x86_64_backend_data
832 #define get_elf_x86_64_arch_data(bed) \
833 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
835 #define get_elf_x86_64_backend_data(abfd) \
836 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
838 /* These are the standard parameters. */
839 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt
=
841 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
842 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
843 elf_x86_64_lazy_plt_entry
, /* plt_entry */
844 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
845 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 2, /* plt0_got1_offset */
878 1+8, /* plt0_got2_offset */
879 1+12, /* plt0_got2_insn_end */
880 1+2, /* plt_got_offset */
881 1, /* plt_reloc_offset */
882 7, /* plt_plt_offset */
883 1+6, /* plt_got_insn_size */
884 11, /* plt_plt_insn_end */
885 0, /* plt_lazy_offset */
886 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
887 elf_x86_64_lazy_bnd_plt_entry
, /* pic_plt_entry */
888 elf_x86_64_eh_frame_lazy_bnd_plt
, /* eh_frame_plt */
889 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt
) /* eh_frame_plt_size */
892 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt
=
894 elf_x86_64_non_lazy_bnd_plt_entry
, /* plt_entry */
895 elf_x86_64_non_lazy_bnd_plt_entry
, /* pic_plt_entry */
896 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
897 1+2, /* plt_got_offset */
898 1+6, /* plt_got_insn_size */
899 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
900 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
903 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt
=
905 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
906 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
907 elf_x86_64_lazy_ibt_plt_entry
, /* plt_entry */
908 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
909 2, /* plt0_got1_offset */
910 1+8, /* plt0_got2_offset */
911 1+12, /* plt0_got2_insn_end */
912 4+1+2, /* plt_got_offset */
913 4+1, /* plt_reloc_offset */
914 4+1+6, /* plt_plt_offset */
915 4+1+6, /* plt_got_insn_size */
916 4+1+5+5, /* plt_plt_insn_end */
917 0, /* plt_lazy_offset */
918 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
919 elf_x86_64_lazy_ibt_plt_entry
, /* pic_plt_entry */
920 elf_x86_64_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
921 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
924 static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt
=
926 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
927 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
928 elf_x32_lazy_ibt_plt_entry
, /* plt_entry */
929 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
930 2, /* plt0_got1_offset */
931 8, /* plt0_got2_offset */
932 12, /* plt0_got2_insn_end */
933 4+2, /* plt_got_offset */
934 4+1, /* plt_reloc_offset */
935 4+6, /* plt_plt_offset */
936 4+6, /* plt_got_insn_size */
937 4+5+5, /* plt_plt_insn_end */
938 0, /* plt_lazy_offset */
939 elf_x86_64_lazy_plt0_entry
, /* pic_plt0_entry */
940 elf_x32_lazy_ibt_plt_entry
, /* pic_plt_entry */
941 elf_x32_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
942 sizeof (elf_x32_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
945 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt
=
947 elf_x86_64_non_lazy_ibt_plt_entry
, /* plt_entry */
948 elf_x86_64_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
949 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
950 4+1+2, /* plt_got_offset */
951 4+1+6, /* plt_got_insn_size */
952 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
953 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
956 static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt
=
958 elf_x32_non_lazy_ibt_plt_entry
, /* plt_entry */
959 elf_x32_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
960 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
961 4+2, /* plt_got_offset */
962 4+6, /* plt_got_insn_size */
963 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
964 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
967 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
972 #define elf_backend_arch_data &elf_x86_64_arch_bed
975 elf64_x86_64_elf_object_p (bfd
*abfd
)
977 /* Set the right machine number for an x86-64 elf64 file. */
978 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
983 elf32_x86_64_elf_object_p (bfd
*abfd
)
985 /* Set the right machine number for an x86-64 elf32 file. */
986 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
990 /* Return TRUE if the TLS access code sequence support transition
994 elf_x86_64_check_tls_transition (bfd
*abfd
,
995 struct bfd_link_info
*info
,
998 Elf_Internal_Shdr
*symtab_hdr
,
999 struct elf_link_hash_entry
**sym_hashes
,
1000 unsigned int r_type
,
1001 const Elf_Internal_Rela
*rel
,
1002 const Elf_Internal_Rela
*relend
)
1005 unsigned long r_symndx
;
1006 bfd_boolean largepic
= FALSE
;
1007 struct elf_link_hash_entry
*h
;
1009 struct elf_x86_link_hash_table
*htab
;
1011 bfd_boolean indirect_call
;
1013 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1014 offset
= rel
->r_offset
;
1017 case R_X86_64_TLSGD
:
1018 case R_X86_64_TLSLD
:
1019 if ((rel
+ 1) >= relend
)
1022 if (r_type
== R_X86_64_TLSGD
)
1024 /* Check transition from GD access model. For 64bit, only
1025 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1026 .word 0x6666; rex64; call __tls_get_addr@PLT
1028 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1030 call *__tls_get_addr@GOTPCREL(%rip)
1031 which may be converted to
1032 addr32 call __tls_get_addr
1033 can transit to different access model. For 32bit, only
1034 leaq foo@tlsgd(%rip), %rdi
1035 .word 0x6666; rex64; call __tls_get_addr@PLT
1037 leaq foo@tlsgd(%rip), %rdi
1039 call *__tls_get_addr@GOTPCREL(%rip)
1040 which may be converted to
1041 addr32 call __tls_get_addr
1042 can transit to different access model. For largepic,
1044 leaq foo@tlsgd(%rip), %rdi
1045 movabsq $__tls_get_addr@pltoff, %rax
1049 leaq foo@tlsgd(%rip), %rdi
1050 movabsq $__tls_get_addr@pltoff, %rax
1054 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1056 if ((offset
+ 12) > sec
->size
)
1059 call
= contents
+ offset
+ 4;
1061 || !((call
[1] == 0x48
1069 && call
[3] == 0xe8)))
1071 if (!ABI_64_P (abfd
)
1072 || (offset
+ 19) > sec
->size
1074 || memcmp (call
- 7, leaq
+ 1, 3) != 0
1075 || memcmp (call
, "\x48\xb8", 2) != 0
1079 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1080 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1084 else if (ABI_64_P (abfd
))
1087 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1093 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1096 indirect_call
= call
[2] == 0xff;
1100 /* Check transition from LD access model. Only
1101 leaq foo@tlsld(%rip), %rdi;
1102 call __tls_get_addr@PLT
1104 leaq foo@tlsld(%rip), %rdi;
1105 call *__tls_get_addr@GOTPCREL(%rip)
1106 which may be converted to
1107 addr32 call __tls_get_addr
1108 can transit to different access model. For largepic
1110 leaq foo@tlsld(%rip), %rdi
1111 movabsq $__tls_get_addr@pltoff, %rax
1115 leaq foo@tlsld(%rip), %rdi
1116 movabsq $__tls_get_addr@pltoff, %rax
1120 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1122 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1125 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1128 call
= contents
+ offset
+ 4;
1129 if (!(call
[0] == 0xe8
1130 || (call
[0] == 0xff && call
[1] == 0x15)
1131 || (call
[0] == 0x67 && call
[1] == 0xe8)))
1133 if (!ABI_64_P (abfd
)
1134 || (offset
+ 19) > sec
->size
1135 || memcmp (call
, "\x48\xb8", 2) != 0
1139 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1140 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1144 indirect_call
= call
[0] == 0xff;
1147 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1148 if (r_symndx
< symtab_hdr
->sh_info
)
1151 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1153 || !((struct elf_x86_link_hash_entry
*) h
)->tls_get_addr
)
1157 r_type
= (ELF32_R_TYPE (rel
[1].r_info
)
1158 & ~R_X86_64_converted_reloc_bit
);
1160 return r_type
== R_X86_64_PLTOFF64
;
1161 else if (indirect_call
)
1162 return r_type
== R_X86_64_GOTPCRELX
;
1164 return (r_type
== R_X86_64_PC32
|| r_type
== R_X86_64_PLT32
);
1167 case R_X86_64_GOTTPOFF
:
1168 /* Check transition from IE access model:
1169 mov foo@gottpoff(%rip), %reg
1170 add foo@gottpoff(%rip), %reg
1173 /* Check REX prefix first. */
1174 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1176 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1177 if (val
!= 0x48 && val
!= 0x4c)
1179 /* X32 may have 0x44 REX prefix or no REX prefix. */
1180 if (ABI_64_P (abfd
))
1186 /* X32 may not have any REX prefix. */
1187 if (ABI_64_P (abfd
))
1189 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1193 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1194 if (val
!= 0x8b && val
!= 0x03)
1197 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1198 return (val
& 0xc7) == 5;
1200 case R_X86_64_GOTPC32_TLSDESC
:
1201 /* Check transition from GDesc access model:
1202 leaq x@tlsdesc(%rip), %rax
1204 Make sure it's a leaq adding rip to a 32-bit offset
1205 into any register, although it's probably almost always
1208 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1211 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1212 if ((val
& 0xfb) != 0x48)
1215 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1218 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1219 return (val
& 0xc7) == 0x05;
1221 case R_X86_64_TLSDESC_CALL
:
1222 /* Check transition from GDesc access model:
1223 call *x@tlsdesc(%rax)
1225 if (offset
+ 2 <= sec
->size
)
1227 /* Make sure that it's a call *x@tlsdesc(%rax). */
1228 call
= contents
+ offset
;
1229 return call
[0] == 0xff && call
[1] == 0x10;
1239 /* Return TRUE if the TLS access transition is OK or no transition
1240 will be performed. Update R_TYPE if there is a transition. */
1243 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1244 asection
*sec
, bfd_byte
*contents
,
1245 Elf_Internal_Shdr
*symtab_hdr
,
1246 struct elf_link_hash_entry
**sym_hashes
,
1247 unsigned int *r_type
, int tls_type
,
1248 const Elf_Internal_Rela
*rel
,
1249 const Elf_Internal_Rela
*relend
,
1250 struct elf_link_hash_entry
*h
,
1251 unsigned long r_symndx
,
1252 bfd_boolean from_relocate_section
)
1254 unsigned int from_type
= *r_type
;
1255 unsigned int to_type
= from_type
;
1256 bfd_boolean check
= TRUE
;
1258 /* Skip TLS transition for functions. */
1260 && (h
->type
== STT_FUNC
1261 || h
->type
== STT_GNU_IFUNC
))
1266 case R_X86_64_TLSGD
:
1267 case R_X86_64_GOTPC32_TLSDESC
:
1268 case R_X86_64_TLSDESC_CALL
:
1269 case R_X86_64_GOTTPOFF
:
1270 if (bfd_link_executable (info
))
1273 to_type
= R_X86_64_TPOFF32
;
1275 to_type
= R_X86_64_GOTTPOFF
;
1278 /* When we are called from elf_x86_64_relocate_section, there may
1279 be additional transitions based on TLS_TYPE. */
1280 if (from_relocate_section
)
1282 unsigned int new_to_type
= to_type
;
1284 if (TLS_TRANSITION_IE_TO_LE_P (info
, h
, tls_type
))
1285 new_to_type
= R_X86_64_TPOFF32
;
1287 if (to_type
== R_X86_64_TLSGD
1288 || to_type
== R_X86_64_GOTPC32_TLSDESC
1289 || to_type
== R_X86_64_TLSDESC_CALL
)
1291 if (tls_type
== GOT_TLS_IE
)
1292 new_to_type
= R_X86_64_GOTTPOFF
;
1295 /* We checked the transition before when we were called from
1296 elf_x86_64_check_relocs. We only want to check the new
1297 transition which hasn't been checked before. */
1298 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1299 to_type
= new_to_type
;
1304 case R_X86_64_TLSLD
:
1305 if (bfd_link_executable (info
))
1306 to_type
= R_X86_64_TPOFF32
;
1313 /* Return TRUE if there is no transition. */
1314 if (from_type
== to_type
)
1317 /* Check if the transition can be performed. */
1319 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1320 symtab_hdr
, sym_hashes
,
1321 from_type
, rel
, relend
))
1323 reloc_howto_type
*from
, *to
;
1326 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1327 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1330 name
= h
->root
.root
.string
;
1333 struct elf_x86_link_hash_table
*htab
;
1335 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1340 Elf_Internal_Sym
*isym
;
1342 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1344 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1349 /* xgettext:c-format */
1350 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1351 "in section `%A' failed"),
1352 abfd
, from
->name
, to
->name
, name
, rel
->r_offset
, sec
);
1353 bfd_set_error (bfd_error_bad_value
);
1361 /* Rename some of the generic section flags to better document how they
1363 #define check_relocs_failed sec_flg0
1366 elf_x86_64_need_pic (struct bfd_link_info
*info
,
1367 bfd
*input_bfd
, asection
*sec
,
1368 struct elf_link_hash_entry
*h
,
1369 Elf_Internal_Shdr
*symtab_hdr
,
1370 Elf_Internal_Sym
*isym
,
1371 reloc_howto_type
*howto
)
1374 const char *und
= "";
1375 const char *pic
= "";
1381 name
= h
->root
.root
.string
;
1382 switch (ELF_ST_VISIBILITY (h
->other
))
1385 v
= _("hidden symbol ");
1388 v
= _("internal symbol ");
1391 v
= _("protected symbol ");
1394 if (((struct elf_x86_link_hash_entry
*) h
)->def_protected
)
1395 v
= _("protected symbol ");
1398 pic
= _("; recompile with -fPIC");
1402 if (!h
->def_regular
&& !h
->def_dynamic
)
1403 und
= _("undefined ");
1407 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, isym
, NULL
);
1408 pic
= _("; recompile with -fPIC");
1411 if (bfd_link_dll (info
))
1412 object
= _("a shared object");
1413 else if (bfd_link_pie (info
))
1414 object
= _("a PIE object");
1416 object
= _("a PDE object");
1418 /* xgettext:c-format */
1419 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1420 "not be used when making %s%s"),
1421 input_bfd
, howto
->name
, und
, v
, name
,
1423 bfd_set_error (bfd_error_bad_value
);
1424 sec
->check_relocs_failed
= 1;
1428 /* With the local symbol, foo, we convert
1429 mov foo@GOTPCREL(%rip), %reg
1433 call/jmp *foo@GOTPCREL(%rip)
1435 nop call foo/jmp foo nop
1436 When PIC is false, convert
1437 test %reg, foo@GOTPCREL(%rip)
1441 binop foo@GOTPCREL(%rip), %reg
1444 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1448 elf_x86_64_convert_load_reloc (bfd
*abfd
,
1450 unsigned int *r_type_p
,
1451 Elf_Internal_Rela
*irel
,
1452 struct elf_link_hash_entry
*h
,
1453 bfd_boolean
*converted
,
1454 struct bfd_link_info
*link_info
)
1456 struct elf_x86_link_hash_table
*htab
;
1458 bfd_boolean no_overflow
;
1460 bfd_boolean to_reloc_pc32
;
1462 bfd_signed_vma raddend
;
1463 unsigned int opcode
;
1465 unsigned int r_type
= *r_type_p
;
1466 unsigned int r_symndx
;
1467 bfd_vma roff
= irel
->r_offset
;
1469 if (roff
< (r_type
== R_X86_64_REX_GOTPCRELX
? 3 : 2))
1472 raddend
= irel
->r_addend
;
1473 /* Addend for 32-bit PC-relative relocation must be -4. */
1477 htab
= elf_x86_hash_table (link_info
, X86_64_ELF_DATA
);
1478 is_pic
= bfd_link_pic (link_info
);
1480 relocx
= (r_type
== R_X86_64_GOTPCRELX
1481 || r_type
== R_X86_64_REX_GOTPCRELX
);
1483 /* TRUE if --no-relax is used. */
1484 no_overflow
= link_info
->disable_target_specific_optimizations
> 1;
1486 r_symndx
= htab
->r_sym (irel
->r_info
);
1488 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1490 /* Convert mov to lea since it has been done for a while. */
1493 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
1494 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
1495 test, xor instructions. */
1500 /* We convert only to R_X86_64_PC32:
1502 2. R_X86_64_GOTPCREL since we can't modify REX byte.
1503 3. no_overflow is true.
1506 to_reloc_pc32
= (opcode
== 0xff
1511 /* Get the symbol referred to by the reloc. */
1514 Elf_Internal_Sym
*isym
1515 = bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
, r_symndx
);
1517 /* Skip relocation against undefined symbols. */
1518 if (isym
->st_shndx
== SHN_UNDEF
)
1521 if (isym
->st_shndx
== SHN_ABS
)
1522 tsec
= bfd_abs_section_ptr
;
1523 else if (isym
->st_shndx
== SHN_COMMON
)
1524 tsec
= bfd_com_section_ptr
;
1525 else if (isym
->st_shndx
== SHN_X86_64_LCOMMON
)
1526 tsec
= &_bfd_elf_large_com_section
;
1528 tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1532 /* Undefined weak symbol is only bound locally in executable
1533 and its reference is resolved as 0 without relocation
1534 overflow. We can only perform this optimization for
1535 GOTPCRELX relocations since we need to modify REX byte.
1536 It is OK convert mov with R_X86_64_GOTPCREL to
1538 bfd_boolean local_ref
;
1539 struct elf_x86_link_hash_entry
*eh
= elf_x86_hash_entry (h
);
1541 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1542 local_ref
= SYMBOL_REFERENCES_LOCAL_P (link_info
, h
);
1543 if ((relocx
|| opcode
== 0x8b)
1544 && (h
->root
.type
== bfd_link_hash_undefweak
1550 /* Skip for branch instructions since R_X86_64_PC32
1557 /* For non-branch instructions, we can convert to
1558 R_X86_64_32/R_X86_64_32S since we know if there
1560 to_reloc_pc32
= FALSE
;
1563 /* Since we don't know the current PC when PIC is true,
1564 we can't convert to R_X86_64_PC32. */
1565 if (to_reloc_pc32
&& is_pic
)
1570 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
1571 ld.so may use its link-time address. */
1572 else if (h
->start_stop
1575 || h
->root
.type
== bfd_link_hash_defined
1576 || h
->root
.type
== bfd_link_hash_defweak
)
1577 && h
!= htab
->elf
.hdynamic
1580 /* bfd_link_hash_new or bfd_link_hash_undefined is
1581 set by an assignment in a linker script in
1582 bfd_elf_record_link_assignment. start_stop is set
1583 on __start_SECNAME/__stop_SECNAME which mark section
1588 && (h
->root
.type
== bfd_link_hash_new
1589 || h
->root
.type
== bfd_link_hash_undefined
1590 || ((h
->root
.type
== bfd_link_hash_defined
1591 || h
->root
.type
== bfd_link_hash_defweak
)
1592 && h
->root
.u
.def
.section
== bfd_und_section_ptr
))))
1594 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
1599 tsec
= h
->root
.u
.def
.section
;
1605 /* Don't convert GOTPCREL relocation against large section. */
1606 if (elf_section_data (tsec
) != NULL
1607 && (elf_section_flags (tsec
) & SHF_X86_64_LARGE
) != 0)
1610 /* Skip since R_X86_64_PC32/R_X86_64_32/R_X86_64_32S may overflow. */
1617 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
1622 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
1624 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1627 /* Convert to "jmp foo nop". */
1630 nop_offset
= irel
->r_offset
+ 3;
1631 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1632 irel
->r_offset
-= 1;
1633 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1637 struct elf_x86_link_hash_entry
*eh
1638 = (struct elf_x86_link_hash_entry
*) h
;
1640 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1643 /* To support TLS optimization, always use addr32 prefix for
1644 "call *__tls_get_addr@GOTPCREL(%rip)". */
1645 if (eh
&& eh
->tls_get_addr
)
1648 nop_offset
= irel
->r_offset
- 2;
1652 nop
= link_info
->call_nop_byte
;
1653 if (link_info
->call_nop_as_suffix
)
1655 nop_offset
= irel
->r_offset
+ 3;
1656 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1657 irel
->r_offset
-= 1;
1658 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1661 nop_offset
= irel
->r_offset
- 2;
1664 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1665 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1666 r_type
= R_X86_64_PC32
;
1671 unsigned int rex_mask
= REX_R
;
1673 if (r_type
== R_X86_64_REX_GOTPCRELX
)
1674 rex
= bfd_get_8 (abfd
, contents
+ roff
- 3);
1682 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1683 "lea foo(%rip), %reg". */
1685 r_type
= R_X86_64_PC32
;
1689 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1690 "mov $foo, %reg". */
1692 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1693 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1694 if ((rex
& REX_W
) != 0
1695 && ABI_64_P (link_info
->output_bfd
))
1697 /* Keep the REX_W bit in REX byte for LP64. */
1698 r_type
= R_X86_64_32S
;
1699 goto rewrite_modrm_rex
;
1703 /* If the REX_W bit in REX byte isn't needed,
1704 use R_X86_64_32 and clear the W bit to avoid
1705 sign-extend imm32 to imm64. */
1706 r_type
= R_X86_64_32
;
1707 /* Clear the W bit in REX byte. */
1709 goto rewrite_modrm_rex
;
1715 /* R_X86_64_PC32 isn't supported. */
1719 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1722 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
1723 "test $foo, %reg". */
1724 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1729 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
1730 "binop $foo, %reg". */
1731 modrm
= 0xc0 | (modrm
& 0x38) >> 3 | (opcode
& 0x3c);
1735 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
1736 overflow when sign-extending imm32 to imm64. */
1737 r_type
= (rex
& REX_W
) != 0 ? R_X86_64_32S
: R_X86_64_32
;
1740 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1744 /* Move the R bit to the B bit in REX byte. */
1745 rex
= (rex
& ~rex_mask
) | (rex
& REX_R
) >> 2;
1746 bfd_put_8 (abfd
, rex
, contents
+ roff
- 3);
1749 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
1753 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1757 irel
->r_info
= htab
->r_info (r_symndx
,
1758 r_type
| R_X86_64_converted_reloc_bit
);
1765 /* Look through the relocs for a section during the first phase, and
1766 calculate needed space in the global offset table, procedure
1767 linkage table, and dynamic reloc sections. */
1770 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1772 const Elf_Internal_Rela
*relocs
)
1774 struct elf_x86_link_hash_table
*htab
;
1775 Elf_Internal_Shdr
*symtab_hdr
;
1776 struct elf_link_hash_entry
**sym_hashes
;
1777 const Elf_Internal_Rela
*rel
;
1778 const Elf_Internal_Rela
*rel_end
;
1781 bfd_boolean converted
;
1783 if (bfd_link_relocatable (info
))
1786 /* Don't do anything special with non-loaded, non-alloced sections.
1787 In particular, any relocs in such sections should not affect GOT
1788 and PLT reference counting (ie. we don't allow them to create GOT
1789 or PLT entries), there's no possibility or desire to optimize TLS
1790 relocs, and there's not much point in propagating relocs to shared
1791 libs that the dynamic linker won't relocate. */
1792 if ((sec
->flags
& SEC_ALLOC
) == 0)
1795 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1798 sec
->check_relocs_failed
= 1;
1802 BFD_ASSERT (is_x86_elf (abfd
, htab
));
1804 /* Get the section contents. */
1805 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1806 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1807 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1809 sec
->check_relocs_failed
= 1;
1813 symtab_hdr
= &elf_symtab_hdr (abfd
);
1814 sym_hashes
= elf_sym_hashes (abfd
);
1820 rel_end
= relocs
+ sec
->reloc_count
;
1821 for (rel
= relocs
; rel
< rel_end
; rel
++)
1823 unsigned int r_type
;
1824 unsigned int r_symndx
;
1825 struct elf_link_hash_entry
*h
;
1826 struct elf_x86_link_hash_entry
*eh
;
1827 Elf_Internal_Sym
*isym
;
1829 bfd_boolean size_reloc
;
1830 bfd_boolean converted_reloc
;
1832 r_symndx
= htab
->r_sym (rel
->r_info
);
1833 r_type
= ELF32_R_TYPE (rel
->r_info
);
1835 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1837 /* xgettext:c-format */
1838 _bfd_error_handler (_("%B: bad symbol index: %d"),
1843 if (r_symndx
< symtab_hdr
->sh_info
)
1845 /* A local symbol. */
1846 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1851 /* Check relocation against local STT_GNU_IFUNC symbol. */
1852 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1854 h
= _bfd_elf_x86_get_local_sym_hash (htab
, abfd
, rel
,
1859 /* Fake a STT_GNU_IFUNC symbol. */
1860 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1862 h
->type
= STT_GNU_IFUNC
;
1865 h
->forced_local
= 1;
1866 h
->root
.type
= bfd_link_hash_defined
;
1874 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1875 while (h
->root
.type
== bfd_link_hash_indirect
1876 || h
->root
.type
== bfd_link_hash_warning
)
1877 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1880 /* Check invalid x32 relocations. */
1881 if (!ABI_64_P (abfd
))
1887 case R_X86_64_DTPOFF64
:
1888 case R_X86_64_TPOFF64
:
1890 case R_X86_64_GOTOFF64
:
1891 case R_X86_64_GOT64
:
1892 case R_X86_64_GOTPCREL64
:
1893 case R_X86_64_GOTPC64
:
1894 case R_X86_64_GOTPLT64
:
1895 case R_X86_64_PLTOFF64
:
1898 name
= h
->root
.root
.string
;
1900 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1903 /* xgettext:c-format */
1904 (_("%B: relocation %s against symbol `%s' isn't "
1905 "supported in x32 mode"), abfd
,
1906 x86_64_elf_howto_table
[r_type
].name
, name
);
1907 bfd_set_error (bfd_error_bad_value
);
1915 /* It is referenced by a non-shared object. */
1917 h
->root
.non_ir_ref_regular
= 1;
1919 if (h
->type
== STT_GNU_IFUNC
)
1920 elf_tdata (info
->output_bfd
)->has_gnu_symbols
1921 |= elf_gnu_symbol_ifunc
;
1924 converted_reloc
= FALSE
;
1925 if ((r_type
== R_X86_64_GOTPCREL
1926 || r_type
== R_X86_64_GOTPCRELX
1927 || r_type
== R_X86_64_REX_GOTPCRELX
)
1928 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1930 Elf_Internal_Rela
*irel
= (Elf_Internal_Rela
*) rel
;
1931 if (!elf_x86_64_convert_load_reloc (abfd
, contents
, &r_type
,
1932 irel
, h
, &converted_reloc
,
1936 if (converted_reloc
)
1940 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, contents
,
1941 symtab_hdr
, sym_hashes
,
1942 &r_type
, GOT_UNKNOWN
,
1943 rel
, rel_end
, h
, r_symndx
, FALSE
))
1946 eh
= (struct elf_x86_link_hash_entry
*) h
;
1949 case R_X86_64_TLSLD
:
1950 htab
->tls_ld_or_ldm_got
.refcount
+= 1;
1953 case R_X86_64_TPOFF32
:
1954 if (!bfd_link_executable (info
) && ABI_64_P (abfd
))
1955 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
1956 &x86_64_elf_howto_table
[r_type
]);
1958 eh
->has_got_reloc
= 1;
1961 case R_X86_64_GOTTPOFF
:
1962 if (!bfd_link_executable (info
))
1963 info
->flags
|= DF_STATIC_TLS
;
1966 case R_X86_64_GOT32
:
1967 case R_X86_64_GOTPCREL
:
1968 case R_X86_64_GOTPCRELX
:
1969 case R_X86_64_REX_GOTPCRELX
:
1970 case R_X86_64_TLSGD
:
1971 case R_X86_64_GOT64
:
1972 case R_X86_64_GOTPCREL64
:
1973 case R_X86_64_GOTPLT64
:
1974 case R_X86_64_GOTPC32_TLSDESC
:
1975 case R_X86_64_TLSDESC_CALL
:
1976 /* This symbol requires a global offset table entry. */
1978 int tls_type
, old_tls_type
;
1982 default: tls_type
= GOT_NORMAL
; break;
1983 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1984 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1985 case R_X86_64_GOTPC32_TLSDESC
:
1986 case R_X86_64_TLSDESC_CALL
:
1987 tls_type
= GOT_TLS_GDESC
; break;
1992 h
->got
.refcount
+= 1;
1993 old_tls_type
= eh
->tls_type
;
1997 bfd_signed_vma
*local_got_refcounts
;
1999 /* This is a global offset table entry for a local symbol. */
2000 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2001 if (local_got_refcounts
== NULL
)
2005 size
= symtab_hdr
->sh_info
;
2006 size
*= sizeof (bfd_signed_vma
)
2007 + sizeof (bfd_vma
) + sizeof (char);
2008 local_got_refcounts
= ((bfd_signed_vma
*)
2009 bfd_zalloc (abfd
, size
));
2010 if (local_got_refcounts
== NULL
)
2012 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2013 elf_x86_local_tlsdesc_gotent (abfd
)
2014 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2015 elf_x86_local_got_tls_type (abfd
)
2016 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2018 local_got_refcounts
[r_symndx
] += 1;
2020 = elf_x86_local_got_tls_type (abfd
) [r_symndx
];
2023 /* If a TLS symbol is accessed using IE at least once,
2024 there is no point to use dynamic model for it. */
2025 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2026 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2027 || tls_type
!= GOT_TLS_IE
))
2029 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
2030 tls_type
= old_tls_type
;
2031 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2032 && GOT_TLS_GD_ANY_P (tls_type
))
2033 tls_type
|= old_tls_type
;
2037 name
= h
->root
.root
.string
;
2039 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
2042 /* xgettext:c-format */
2043 (_("%B: '%s' accessed both as normal and"
2044 " thread local symbol"),
2046 bfd_set_error (bfd_error_bad_value
);
2051 if (old_tls_type
!= tls_type
)
2054 eh
->tls_type
= tls_type
;
2056 elf_x86_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2061 case R_X86_64_GOTOFF64
:
2062 case R_X86_64_GOTPC32
:
2063 case R_X86_64_GOTPC64
:
2066 eh
->has_got_reloc
= 1;
2069 case R_X86_64_PLT32
:
2070 case R_X86_64_PLT32_BND
:
2071 /* This symbol requires a procedure linkage table entry. We
2072 actually build the entry in adjust_dynamic_symbol,
2073 because this might be a case of linking PIC code which is
2074 never referenced by a dynamic object, in which case we
2075 don't need to generate a procedure linkage table entry
2078 /* If this is a local symbol, we resolve it directly without
2079 creating a procedure linkage table entry. */
2083 eh
->has_got_reloc
= 1;
2085 h
->plt
.refcount
+= 1;
2088 case R_X86_64_PLTOFF64
:
2089 /* This tries to form the 'address' of a function relative
2090 to GOT. For global symbols we need a PLT entry. */
2094 h
->plt
.refcount
+= 1;
2098 case R_X86_64_SIZE32
:
2099 case R_X86_64_SIZE64
:
2104 if (!ABI_64_P (abfd
))
2110 /* Check relocation overflow as these relocs may lead to
2111 run-time relocation overflow. Don't error out for
2112 sections we don't care about, such as debug sections or
2113 when relocation overflow check is disabled. */
2114 if (!info
->no_reloc_overflow_check
2116 && (bfd_link_pic (info
)
2117 || (bfd_link_executable (info
)
2121 && (sec
->flags
& SEC_READONLY
) == 0)))
2122 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
2123 &x86_64_elf_howto_table
[r_type
]);
2129 case R_X86_64_PC32_BND
:
2133 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2134 eh
->has_non_got_reloc
= 1;
2135 /* We are called after all symbols have been resolved. Only
2136 relocation against STT_GNU_IFUNC symbol must go through
2139 && (bfd_link_executable (info
)
2140 || h
->type
== STT_GNU_IFUNC
))
2142 /* If this reloc is in a read-only section, we might
2143 need a copy reloc. We can't check reliably at this
2144 stage whether the section is read-only, as input
2145 sections have not yet been mapped to output sections.
2146 Tentatively set the flag for now, and correct in
2147 adjust_dynamic_symbol. */
2150 /* We may need a .plt entry if the symbol is a function
2151 defined in a shared lib or is a STT_GNU_IFUNC function
2152 referenced from the code or read-only section. */
2154 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2155 h
->plt
.refcount
+= 1;
2157 if (r_type
== R_X86_64_PC32
)
2159 /* Since something like ".long foo - ." may be used
2160 as pointer, make sure that PLT is used if foo is
2161 a function defined in a shared library. */
2162 if ((sec
->flags
& SEC_CODE
) == 0)
2163 h
->pointer_equality_needed
= 1;
2165 else if (r_type
!= R_X86_64_PC32_BND
2166 && r_type
!= R_X86_64_PC64
)
2168 h
->pointer_equality_needed
= 1;
2169 /* At run-time, R_X86_64_64 can be resolved for both
2170 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2171 can only be resolved for x32. */
2172 if ((sec
->flags
& SEC_READONLY
) == 0
2173 && (r_type
== R_X86_64_64
2174 || (!ABI_64_P (abfd
)
2175 && (r_type
== R_X86_64_32
2176 || r_type
== R_X86_64_32S
))))
2177 eh
->func_pointer_refcount
+= 1;
2183 /* If we are creating a shared library, and this is a reloc
2184 against a global symbol, or a non PC relative reloc
2185 against a local symbol, then we need to copy the reloc
2186 into the shared library. However, if we are linking with
2187 -Bsymbolic, we do not need to copy a reloc against a
2188 global symbol which is defined in an object we are
2189 including in the link (i.e., DEF_REGULAR is set). At
2190 this point we have not seen all the input files, so it is
2191 possible that DEF_REGULAR is not set now but will be set
2192 later (it is never cleared). In case of a weak definition,
2193 DEF_REGULAR may be cleared later by a strong definition in
2194 a shared library. We account for that possibility below by
2195 storing information in the relocs_copied field of the hash
2196 table entry. A similar situation occurs when creating
2197 shared libraries and symbol visibility changes render the
2200 If on the other hand, we are creating an executable, we
2201 may need to keep relocations for symbols satisfied by a
2202 dynamic library if we manage to avoid copy relocs for the
2205 Generate dynamic pointer relocation against STT_GNU_IFUNC
2206 symbol in the non-code section. */
2207 if ((bfd_link_pic (info
)
2208 && (! IS_X86_64_PCREL_TYPE (r_type
)
2210 && (! (bfd_link_pie (info
)
2211 || SYMBOLIC_BIND (info
, h
))
2212 || h
->root
.type
== bfd_link_hash_defweak
2213 || !h
->def_regular
))))
2215 && h
->type
== STT_GNU_IFUNC
2216 && r_type
== htab
->pointer_r_type
2217 && (sec
->flags
& SEC_CODE
) == 0)
2218 || (ELIMINATE_COPY_RELOCS
2219 && !bfd_link_pic (info
)
2221 && (h
->root
.type
== bfd_link_hash_defweak
2222 || !h
->def_regular
)))
2224 struct elf_dyn_relocs
*p
;
2225 struct elf_dyn_relocs
**head
;
2227 /* We must copy these reloc types into the output file.
2228 Create a reloc section in dynobj and make room for
2232 sreloc
= _bfd_elf_make_dynamic_reloc_section
2233 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2234 abfd
, /*rela?*/ TRUE
);
2240 /* If this is a global symbol, we count the number of
2241 relocations we need for this symbol. */
2243 head
= &eh
->dyn_relocs
;
2246 /* Track dynamic relocs needed for local syms too.
2247 We really need local syms available to do this
2252 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2257 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2261 /* Beware of type punned pointers vs strict aliasing
2263 vpp
= &(elf_section_data (s
)->local_dynrel
);
2264 head
= (struct elf_dyn_relocs
**)vpp
;
2268 if (p
== NULL
|| p
->sec
!= sec
)
2270 bfd_size_type amt
= sizeof *p
;
2272 p
= ((struct elf_dyn_relocs
*)
2273 bfd_alloc (htab
->elf
.dynobj
, amt
));
2284 /* Count size relocation as PC-relative relocation. */
2285 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
2290 /* This relocation describes the C++ object vtable hierarchy.
2291 Reconstruct it for later use during GC. */
2292 case R_X86_64_GNU_VTINHERIT
:
2293 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2297 /* This relocation describes which C++ vtable entries are actually
2298 used. Record for later use during GC. */
2299 case R_X86_64_GNU_VTENTRY
:
2300 BFD_ASSERT (h
!= NULL
);
2302 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2311 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2313 if (!converted
&& !info
->keep_memory
)
2317 /* Cache the section contents for elf_link_input_bfd if any
2318 load is converted or --no-keep-memory isn't used. */
2319 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2323 /* Cache relocations if any load is converted. */
2324 if (elf_section_data (sec
)->relocs
!= relocs
&& converted
)
2325 elf_section_data (sec
)->relocs
= (Elf_Internal_Rela
*) relocs
;
2330 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2332 sec
->check_relocs_failed
= 1;
2336 /* Return the relocation value for @tpoff relocation
2337 if STT_TLS virtual address is ADDRESS. */
2340 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2342 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2343 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
2344 bfd_vma static_tls_size
;
2346 /* If tls_segment is NULL, we should have signalled an error already. */
2347 if (htab
->tls_sec
== NULL
)
2350 /* Consider special static TLS alignment requirements. */
2351 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
2352 return address
- static_tls_size
- htab
->tls_sec
->vma
;
2355 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
2359 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
2361 /* Opcode Instruction
2364 0x0f 0x8x conditional jump */
2366 && (contents
[offset
- 1] == 0xe8
2367 || contents
[offset
- 1] == 0xe9))
2369 && contents
[offset
- 2] == 0x0f
2370 && (contents
[offset
- 1] & 0xf0) == 0x80));
2373 /* Relocate an x86_64 ELF section. */
2376 elf_x86_64_relocate_section (bfd
*output_bfd
,
2377 struct bfd_link_info
*info
,
2379 asection
*input_section
,
2381 Elf_Internal_Rela
*relocs
,
2382 Elf_Internal_Sym
*local_syms
,
2383 asection
**local_sections
)
2385 struct elf_x86_link_hash_table
*htab
;
2386 Elf_Internal_Shdr
*symtab_hdr
;
2387 struct elf_link_hash_entry
**sym_hashes
;
2388 bfd_vma
*local_got_offsets
;
2389 bfd_vma
*local_tlsdesc_gotents
;
2390 Elf_Internal_Rela
*rel
;
2391 Elf_Internal_Rela
*wrel
;
2392 Elf_Internal_Rela
*relend
;
2393 unsigned int plt_entry_size
;
2395 /* Skip if check_relocs failed. */
2396 if (input_section
->check_relocs_failed
)
2399 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
2403 BFD_ASSERT (is_x86_elf (input_bfd
, htab
));
2405 plt_entry_size
= htab
->plt
.plt_entry_size
;
2406 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2407 sym_hashes
= elf_sym_hashes (input_bfd
);
2408 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2409 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
2411 _bfd_x86_elf_set_tls_module_base (info
);
2413 rel
= wrel
= relocs
;
2414 relend
= relocs
+ input_section
->reloc_count
;
2415 for (; rel
< relend
; wrel
++, rel
++)
2417 unsigned int r_type
, r_type_tls
;
2418 reloc_howto_type
*howto
;
2419 unsigned long r_symndx
;
2420 struct elf_link_hash_entry
*h
;
2421 struct elf_x86_link_hash_entry
*eh
;
2422 Elf_Internal_Sym
*sym
;
2424 bfd_vma off
, offplt
, plt_offset
;
2426 bfd_boolean unresolved_reloc
;
2427 bfd_reloc_status_type r
;
2429 asection
*base_got
, *resolved_plt
;
2431 bfd_boolean resolved_to_zero
;
2432 bfd_boolean relative_reloc
;
2433 bfd_boolean converted_reloc
;
2435 r_type
= ELF32_R_TYPE (rel
->r_info
);
2436 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
2437 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
2444 converted_reloc
= (r_type
& R_X86_64_converted_reloc_bit
) != 0;
2445 r_type
&= ~R_X86_64_converted_reloc_bit
;
2447 if (r_type
>= (int) R_X86_64_standard
)
2448 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
2450 if (r_type
!= (int) R_X86_64_32
2451 || ABI_64_P (output_bfd
))
2452 howto
= x86_64_elf_howto_table
+ r_type
;
2454 howto
= (x86_64_elf_howto_table
2455 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
2456 r_symndx
= htab
->r_sym (rel
->r_info
);
2460 unresolved_reloc
= FALSE
;
2461 if (r_symndx
< symtab_hdr
->sh_info
)
2463 sym
= local_syms
+ r_symndx
;
2464 sec
= local_sections
[r_symndx
];
2466 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
2468 st_size
= sym
->st_size
;
2470 /* Relocate against local STT_GNU_IFUNC symbol. */
2471 if (!bfd_link_relocatable (info
)
2472 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2474 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
,
2479 /* Set STT_GNU_IFUNC symbol value. */
2480 h
->root
.u
.def
.value
= sym
->st_value
;
2481 h
->root
.u
.def
.section
= sec
;
2486 bfd_boolean warned ATTRIBUTE_UNUSED
;
2487 bfd_boolean ignored ATTRIBUTE_UNUSED
;
2489 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2490 r_symndx
, symtab_hdr
, sym_hashes
,
2492 unresolved_reloc
, warned
, ignored
);
2496 if (sec
!= NULL
&& discarded_section (sec
))
2498 _bfd_clear_contents (howto
, input_bfd
, input_section
,
2499 contents
+ rel
->r_offset
);
2500 wrel
->r_offset
= rel
->r_offset
;
2504 /* For ld -r, remove relocations in debug sections against
2505 sections defined in discarded sections. Not done for
2506 eh_frame editing code expects to be present. */
2507 if (bfd_link_relocatable (info
)
2508 && (input_section
->flags
& SEC_DEBUGGING
))
2514 if (bfd_link_relocatable (info
))
2521 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
2523 if (r_type
== R_X86_64_64
)
2525 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
2526 zero-extend it to 64bit if addend is zero. */
2527 r_type
= R_X86_64_32
;
2528 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2530 else if (r_type
== R_X86_64_SIZE64
)
2532 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
2533 zero-extend it to 64bit if addend is zero. */
2534 r_type
= R_X86_64_SIZE32
;
2535 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2539 eh
= (struct elf_x86_link_hash_entry
*) h
;
2541 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2542 it here if it is defined in a non-shared object. */
2544 && h
->type
== STT_GNU_IFUNC
2550 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2552 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2553 sections because such sections are not SEC_ALLOC and
2554 thus ld.so will not process them. */
2555 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2565 case R_X86_64_GOTPCREL
:
2566 case R_X86_64_GOTPCRELX
:
2567 case R_X86_64_REX_GOTPCRELX
:
2568 case R_X86_64_GOTPCREL64
:
2569 base_got
= htab
->elf
.sgot
;
2570 off
= h
->got
.offset
;
2572 if (base_got
== NULL
)
2575 if (off
== (bfd_vma
) -1)
2577 /* We can't use h->got.offset here to save state, or
2578 even just remember the offset, as finish_dynamic_symbol
2579 would use that as offset into .got. */
2581 if (h
->plt
.offset
== (bfd_vma
) -1)
2584 if (htab
->elf
.splt
!= NULL
)
2586 plt_index
= (h
->plt
.offset
/ plt_entry_size
2587 - htab
->plt
.has_plt0
);
2588 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2589 base_got
= htab
->elf
.sgotplt
;
2593 plt_index
= h
->plt
.offset
/ plt_entry_size
;
2594 off
= plt_index
* GOT_ENTRY_SIZE
;
2595 base_got
= htab
->elf
.igotplt
;
2598 if (h
->dynindx
== -1
2602 /* This references the local defitionion. We must
2603 initialize this entry in the global offset table.
2604 Since the offset must always be a multiple of 8,
2605 we use the least significant bit to record
2606 whether we have initialized it already.
2608 When doing a dynamic link, we create a .rela.got
2609 relocation entry to initialize the value. This
2610 is done in the finish_dynamic_symbol routine. */
2615 bfd_put_64 (output_bfd
, relocation
,
2616 base_got
->contents
+ off
);
2617 /* Note that this is harmless for the GOTPLT64
2618 case, as -1 | 1 still is -1. */
2624 relocation
= (base_got
->output_section
->vma
2625 + base_got
->output_offset
+ off
);
2630 if (h
->plt
.offset
== (bfd_vma
) -1)
2632 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2633 if (r_type
== htab
->pointer_r_type
2634 && (input_section
->flags
& SEC_CODE
) == 0)
2635 goto do_ifunc_pointer
;
2636 goto bad_ifunc_reloc
;
2639 /* STT_GNU_IFUNC symbol must go through PLT. */
2640 if (htab
->elf
.splt
!= NULL
)
2642 if (htab
->plt_second
!= NULL
)
2644 resolved_plt
= htab
->plt_second
;
2645 plt_offset
= eh
->plt_second
.offset
;
2649 resolved_plt
= htab
->elf
.splt
;
2650 plt_offset
= h
->plt
.offset
;
2655 resolved_plt
= htab
->elf
.iplt
;
2656 plt_offset
= h
->plt
.offset
;
2659 relocation
= (resolved_plt
->output_section
->vma
2660 + resolved_plt
->output_offset
+ plt_offset
);
2666 if (h
->root
.root
.string
)
2667 name
= h
->root
.root
.string
;
2669 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2672 /* xgettext:c-format */
2673 (_("%B: relocation %s against STT_GNU_IFUNC "
2674 "symbol `%s' isn't supported"), input_bfd
,
2676 bfd_set_error (bfd_error_bad_value
);
2680 if (bfd_link_pic (info
))
2685 if (ABI_64_P (output_bfd
))
2690 if (rel
->r_addend
!= 0)
2692 if (h
->root
.root
.string
)
2693 name
= h
->root
.root
.string
;
2695 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
2698 /* xgettext:c-format */
2699 (_("%B: relocation %s against STT_GNU_IFUNC "
2700 "symbol `%s' has non-zero addend: %Ld"),
2701 input_bfd
, howto
->name
, name
, rel
->r_addend
);
2702 bfd_set_error (bfd_error_bad_value
);
2706 /* Generate dynamic relcoation only when there is a
2707 non-GOT reference in a shared object or there is no
2709 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2710 || h
->plt
.offset
== (bfd_vma
) -1)
2712 Elf_Internal_Rela outrel
;
2715 /* Need a dynamic relocation to get the real function
2717 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2721 if (outrel
.r_offset
== (bfd_vma
) -1
2722 || outrel
.r_offset
== (bfd_vma
) -2)
2725 outrel
.r_offset
+= (input_section
->output_section
->vma
2726 + input_section
->output_offset
);
2728 if (h
->dynindx
== -1
2730 || bfd_link_executable (info
))
2732 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
2733 h
->root
.root
.string
,
2734 h
->root
.u
.def
.section
->owner
);
2736 /* This symbol is resolved locally. */
2737 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
2738 outrel
.r_addend
= (h
->root
.u
.def
.value
2739 + h
->root
.u
.def
.section
->output_section
->vma
2740 + h
->root
.u
.def
.section
->output_offset
);
2744 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
2745 outrel
.r_addend
= 0;
2748 /* Dynamic relocations are stored in
2749 1. .rela.ifunc section in PIC object.
2750 2. .rela.got section in dynamic executable.
2751 3. .rela.iplt section in static executable. */
2752 if (bfd_link_pic (info
))
2753 sreloc
= htab
->elf
.irelifunc
;
2754 else if (htab
->elf
.splt
!= NULL
)
2755 sreloc
= htab
->elf
.srelgot
;
2757 sreloc
= htab
->elf
.irelplt
;
2758 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2760 /* If this reloc is against an external symbol, we
2761 do not want to fiddle with the addend. Otherwise,
2762 we need to include the symbol value so that it
2763 becomes an addend for the dynamic reloc. For an
2764 internal symbol, we have updated addend. */
2769 case R_X86_64_PC32_BND
:
2771 case R_X86_64_PLT32
:
2772 case R_X86_64_PLT32_BND
:
2777 resolved_to_zero
= (eh
!= NULL
2778 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
2780 /* When generating a shared object, the relocations handled here are
2781 copied into the output file to be resolved at run time. */
2784 case R_X86_64_GOT32
:
2785 case R_X86_64_GOT64
:
2786 /* Relocation is to the entry for this symbol in the global
2788 case R_X86_64_GOTPCREL
:
2789 case R_X86_64_GOTPCRELX
:
2790 case R_X86_64_REX_GOTPCRELX
:
2791 case R_X86_64_GOTPCREL64
:
2792 /* Use global offset table entry as symbol value. */
2793 case R_X86_64_GOTPLT64
:
2794 /* This is obsolete and treated the same as GOT64. */
2795 base_got
= htab
->elf
.sgot
;
2797 if (htab
->elf
.sgot
== NULL
)
2800 relative_reloc
= FALSE
;
2805 off
= h
->got
.offset
;
2807 && h
->plt
.offset
!= (bfd_vma
)-1
2808 && off
== (bfd_vma
)-1)
2810 /* We can't use h->got.offset here to save
2811 state, or even just remember the offset, as
2812 finish_dynamic_symbol would use that as offset into
2814 bfd_vma plt_index
= (h
->plt
.offset
/ plt_entry_size
2815 - htab
->plt
.has_plt0
);
2816 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2817 base_got
= htab
->elf
.sgotplt
;
2820 dyn
= htab
->elf
.dynamic_sections_created
;
2822 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, bfd_link_pic (info
), h
)
2823 || (bfd_link_pic (info
)
2824 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
2825 || (ELF_ST_VISIBILITY (h
->other
)
2826 && h
->root
.type
== bfd_link_hash_undefweak
))
2828 /* This is actually a static link, or it is a -Bsymbolic
2829 link and the symbol is defined locally, or the symbol
2830 was forced to be local because of a version file. We
2831 must initialize this entry in the global offset table.
2832 Since the offset must always be a multiple of 8, we
2833 use the least significant bit to record whether we
2834 have initialized it already.
2836 When doing a dynamic link, we create a .rela.got
2837 relocation entry to initialize the value. This is
2838 done in the finish_dynamic_symbol routine. */
2843 bfd_put_64 (output_bfd
, relocation
,
2844 base_got
->contents
+ off
);
2845 /* Note that this is harmless for the GOTPLT64 case,
2846 as -1 | 1 still is -1. */
2849 if (h
->dynindx
== -1
2851 && h
->root
.type
!= bfd_link_hash_undefweak
2852 && bfd_link_pic (info
))
2854 /* If this symbol isn't dynamic in PIC,
2855 generate R_X86_64_RELATIVE here. */
2856 eh
->no_finish_dynamic_symbol
= 1;
2857 relative_reloc
= TRUE
;
2862 unresolved_reloc
= FALSE
;
2866 if (local_got_offsets
== NULL
)
2869 off
= local_got_offsets
[r_symndx
];
2871 /* The offset must always be a multiple of 8. We use
2872 the least significant bit to record whether we have
2873 already generated the necessary reloc. */
2878 bfd_put_64 (output_bfd
, relocation
,
2879 base_got
->contents
+ off
);
2880 local_got_offsets
[r_symndx
] |= 1;
2882 if (bfd_link_pic (info
))
2883 relative_reloc
= TRUE
;
2890 Elf_Internal_Rela outrel
;
2892 /* We need to generate a R_X86_64_RELATIVE reloc
2893 for the dynamic linker. */
2894 s
= htab
->elf
.srelgot
;
2898 outrel
.r_offset
= (base_got
->output_section
->vma
2899 + base_got
->output_offset
2901 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
2902 outrel
.r_addend
= relocation
;
2903 elf_append_rela (output_bfd
, s
, &outrel
);
2906 if (off
>= (bfd_vma
) -2)
2909 relocation
= base_got
->output_section
->vma
2910 + base_got
->output_offset
+ off
;
2911 if (r_type
!= R_X86_64_GOTPCREL
2912 && r_type
!= R_X86_64_GOTPCRELX
2913 && r_type
!= R_X86_64_REX_GOTPCRELX
2914 && r_type
!= R_X86_64_GOTPCREL64
)
2915 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2916 - htab
->elf
.sgotplt
->output_offset
;
2920 case R_X86_64_GOTOFF64
:
2921 /* Relocation is relative to the start of the global offset
2924 /* Check to make sure it isn't a protected function or data
2925 symbol for shared library since it may not be local when
2926 used as function address or with copy relocation. We also
2927 need to make sure that a symbol is referenced locally. */
2928 if (bfd_link_pic (info
) && h
)
2930 if (!h
->def_regular
)
2934 switch (ELF_ST_VISIBILITY (h
->other
))
2937 v
= _("hidden symbol");
2940 v
= _("internal symbol");
2943 v
= _("protected symbol");
2951 /* xgettext:c-format */
2952 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
2953 " `%s' can not be used when making a shared object"),
2954 input_bfd
, v
, h
->root
.root
.string
);
2955 bfd_set_error (bfd_error_bad_value
);
2958 else if (!bfd_link_executable (info
)
2959 && !SYMBOL_REFERENCES_LOCAL_P (info
, h
)
2960 && (h
->type
== STT_FUNC
2961 || h
->type
== STT_OBJECT
)
2962 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2965 /* xgettext:c-format */
2966 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
2967 " `%s' can not be used when making a shared object"),
2969 h
->type
== STT_FUNC
? "function" : "data",
2970 h
->root
.root
.string
);
2971 bfd_set_error (bfd_error_bad_value
);
2976 /* Note that sgot is not involved in this
2977 calculation. We always want the start of .got.plt. If we
2978 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2979 permitted by the ABI, we might have to change this
2981 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2982 + htab
->elf
.sgotplt
->output_offset
;
2985 case R_X86_64_GOTPC32
:
2986 case R_X86_64_GOTPC64
:
2987 /* Use global offset table as symbol value. */
2988 relocation
= htab
->elf
.sgotplt
->output_section
->vma
2989 + htab
->elf
.sgotplt
->output_offset
;
2990 unresolved_reloc
= FALSE
;
2993 case R_X86_64_PLTOFF64
:
2994 /* Relocation is PLT entry relative to GOT. For local
2995 symbols it's the symbol itself relative to GOT. */
2997 /* See PLT32 handling. */
2998 && (h
->plt
.offset
!= (bfd_vma
) -1
2999 || eh
->plt_got
.offset
!= (bfd_vma
) -1)
3000 && htab
->elf
.splt
!= NULL
)
3002 if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
3004 /* Use the GOT PLT. */
3005 resolved_plt
= htab
->plt_got
;
3006 plt_offset
= eh
->plt_got
.offset
;
3008 else if (htab
->plt_second
!= NULL
)
3010 resolved_plt
= htab
->plt_second
;
3011 plt_offset
= eh
->plt_second
.offset
;
3015 resolved_plt
= htab
->elf
.splt
;
3016 plt_offset
= h
->plt
.offset
;
3019 relocation
= (resolved_plt
->output_section
->vma
3020 + resolved_plt
->output_offset
3022 unresolved_reloc
= FALSE
;
3025 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3026 + htab
->elf
.sgotplt
->output_offset
;
3029 case R_X86_64_PLT32
:
3030 case R_X86_64_PLT32_BND
:
3031 /* Relocation is to the entry for this symbol in the
3032 procedure linkage table. */
3034 /* Resolve a PLT32 reloc against a local symbol directly,
3035 without using the procedure linkage table. */
3039 if ((h
->plt
.offset
== (bfd_vma
) -1
3040 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3041 || htab
->elf
.splt
== NULL
)
3043 /* We didn't make a PLT entry for this symbol. This
3044 happens when statically linking PIC code, or when
3045 using -Bsymbolic. */
3049 if (h
->plt
.offset
!= (bfd_vma
) -1)
3051 if (htab
->plt_second
!= NULL
)
3053 resolved_plt
= htab
->plt_second
;
3054 plt_offset
= eh
->plt_second
.offset
;
3058 resolved_plt
= htab
->elf
.splt
;
3059 plt_offset
= h
->plt
.offset
;
3064 /* Use the GOT PLT. */
3065 resolved_plt
= htab
->plt_got
;
3066 plt_offset
= eh
->plt_got
.offset
;
3069 relocation
= (resolved_plt
->output_section
->vma
3070 + resolved_plt
->output_offset
3072 unresolved_reloc
= FALSE
;
3075 case R_X86_64_SIZE32
:
3076 case R_X86_64_SIZE64
:
3077 /* Set to symbol size. */
3078 relocation
= st_size
;
3084 case R_X86_64_PC32_BND
:
3085 /* Don't complain about -fPIC if the symbol is undefined when
3086 building executable unless it is unresolved weak symbol or
3087 -z nocopyreloc is used. */
3088 if ((input_section
->flags
& SEC_ALLOC
) != 0
3089 && (input_section
->flags
& SEC_READONLY
) != 0
3091 && ((bfd_link_executable (info
)
3092 && ((h
->root
.type
== bfd_link_hash_undefweak
3093 && !resolved_to_zero
)
3094 || ((info
->nocopyreloc
3095 || (eh
->def_protected
3096 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
3098 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))))
3099 || bfd_link_dll (info
)))
3101 bfd_boolean fail
= FALSE
;
3103 = ((r_type
== R_X86_64_PC32
3104 || r_type
== R_X86_64_PC32_BND
)
3105 && is_32bit_relative_branch (contents
, rel
->r_offset
));
3107 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3109 /* Symbol is referenced locally. Make sure it is
3110 defined locally or for a branch. */
3111 fail
= (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
))
3114 else if (!(bfd_link_pie (info
)
3115 && (h
->needs_copy
|| eh
->needs_copy
)))
3117 /* Symbol doesn't need copy reloc and isn't referenced
3118 locally. We only allow branch to symbol with
3119 non-default visibility. */
3121 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
3125 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3126 h
, NULL
, NULL
, howto
);
3135 /* FIXME: The ABI says the linker should make sure the value is
3136 the same when it's zeroextended to 64 bit. */
3139 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3142 /* Don't copy a pc-relative relocation into the output file
3143 if the symbol needs copy reloc or the symbol is undefined
3144 when building executable. Copy dynamic function pointer
3145 relocations. Don't generate dynamic relocations against
3146 resolved undefined weak symbols in PIE. */
3147 if ((bfd_link_pic (info
)
3148 && !(bfd_link_pie (info
)
3152 || h
->root
.type
== bfd_link_hash_undefined
)
3153 && (IS_X86_64_PCREL_TYPE (r_type
)
3154 || r_type
== R_X86_64_SIZE32
3155 || r_type
== R_X86_64_SIZE64
))
3157 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3158 && !resolved_to_zero
)
3159 || h
->root
.type
!= bfd_link_hash_undefweak
))
3160 && ((! IS_X86_64_PCREL_TYPE (r_type
)
3161 && r_type
!= R_X86_64_SIZE32
3162 && r_type
!= R_X86_64_SIZE64
)
3163 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
3164 || (ELIMINATE_COPY_RELOCS
3165 && !bfd_link_pic (info
)
3169 || eh
->func_pointer_refcount
> 0
3170 || (h
->root
.type
== bfd_link_hash_undefweak
3171 && !resolved_to_zero
))
3172 && ((h
->def_dynamic
&& !h
->def_regular
)
3173 /* Undefined weak symbol is bound locally when
3175 || h
->root
.type
== bfd_link_hash_undefined
)))
3177 Elf_Internal_Rela outrel
;
3178 bfd_boolean skip
, relocate
;
3181 /* When generating a shared object, these relocations
3182 are copied into the output file to be resolved at run
3188 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3190 if (outrel
.r_offset
== (bfd_vma
) -1)
3192 else if (outrel
.r_offset
== (bfd_vma
) -2)
3193 skip
= TRUE
, relocate
= TRUE
;
3195 outrel
.r_offset
+= (input_section
->output_section
->vma
3196 + input_section
->output_offset
);
3199 memset (&outrel
, 0, sizeof outrel
);
3201 /* h->dynindx may be -1 if this symbol was marked to
3205 && (IS_X86_64_PCREL_TYPE (r_type
)
3206 || !(bfd_link_executable (info
)
3207 || SYMBOLIC_BIND (info
, h
))
3208 || ! h
->def_regular
))
3210 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3211 outrel
.r_addend
= rel
->r_addend
;
3215 /* This symbol is local, or marked to become local.
3216 When relocation overflow check is disabled, we
3217 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
3218 if (r_type
== htab
->pointer_r_type
3219 || (r_type
== R_X86_64_32
3220 && info
->no_reloc_overflow_check
))
3223 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3224 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3226 else if (r_type
== R_X86_64_64
3227 && !ABI_64_P (output_bfd
))
3230 outrel
.r_info
= htab
->r_info (0,
3231 R_X86_64_RELATIVE64
);
3232 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3233 /* Check addend overflow. */
3234 if ((outrel
.r_addend
& 0x80000000)
3235 != (rel
->r_addend
& 0x80000000))
3238 int addend
= rel
->r_addend
;
3239 if (h
&& h
->root
.root
.string
)
3240 name
= h
->root
.root
.string
;
3242 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3245 /* xgettext:c-format */
3246 (_("%B: addend %s%#x in relocation %s against "
3247 "symbol `%s' at %#Lx in section `%A' is "
3249 input_bfd
, addend
< 0 ? "-" : "", addend
,
3250 howto
->name
, name
, rel
->r_offset
, input_section
);
3251 bfd_set_error (bfd_error_bad_value
);
3259 if (bfd_is_abs_section (sec
))
3261 else if (sec
== NULL
|| sec
->owner
== NULL
)
3263 bfd_set_error (bfd_error_bad_value
);
3270 /* We are turning this relocation into one
3271 against a section symbol. It would be
3272 proper to subtract the symbol's value,
3273 osec->vma, from the emitted reloc addend,
3274 but ld.so expects buggy relocs. */
3275 osec
= sec
->output_section
;
3276 sindx
= elf_section_data (osec
)->dynindx
;
3279 asection
*oi
= htab
->elf
.text_index_section
;
3280 sindx
= elf_section_data (oi
)->dynindx
;
3282 BFD_ASSERT (sindx
!= 0);
3285 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3286 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3290 sreloc
= elf_section_data (input_section
)->sreloc
;
3292 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3294 r
= bfd_reloc_notsupported
;
3295 goto check_relocation_error
;
3298 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3300 /* If this reloc is against an external symbol, we do
3301 not want to fiddle with the addend. Otherwise, we
3302 need to include the symbol value so that it becomes
3303 an addend for the dynamic reloc. */
3310 case R_X86_64_TLSGD
:
3311 case R_X86_64_GOTPC32_TLSDESC
:
3312 case R_X86_64_TLSDESC_CALL
:
3313 case R_X86_64_GOTTPOFF
:
3314 tls_type
= GOT_UNKNOWN
;
3315 if (h
== NULL
&& local_got_offsets
)
3316 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
3318 tls_type
= elf_x86_hash_entry (h
)->tls_type
;
3320 r_type_tls
= r_type
;
3321 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3322 input_section
, contents
,
3323 symtab_hdr
, sym_hashes
,
3324 &r_type_tls
, tls_type
, rel
,
3325 relend
, h
, r_symndx
, TRUE
))
3328 if (r_type_tls
== R_X86_64_TPOFF32
)
3330 bfd_vma roff
= rel
->r_offset
;
3332 BFD_ASSERT (! unresolved_reloc
);
3334 if (r_type
== R_X86_64_TLSGD
)
3336 /* GD->LE transition. For 64bit, change
3337 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3338 .word 0x6666; rex64; call __tls_get_addr@PLT
3340 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3342 call *__tls_get_addr@GOTPCREL(%rip)
3343 which may be converted to
3344 addr32 call __tls_get_addr
3347 leaq foo@tpoff(%rax), %rax
3349 leaq foo@tlsgd(%rip), %rdi
3350 .word 0x6666; rex64; call __tls_get_addr@PLT
3352 leaq foo@tlsgd(%rip), %rdi
3354 call *__tls_get_addr@GOTPCREL(%rip)
3355 which may be converted to
3356 addr32 call __tls_get_addr
3359 leaq foo@tpoff(%rax), %rax
3360 For largepic, change:
3361 leaq foo@tlsgd(%rip), %rdi
3362 movabsq $__tls_get_addr@pltoff, %rax
3367 leaq foo@tpoff(%rax), %rax
3368 nopw 0x0(%rax,%rax,1) */
3370 if (ABI_64_P (output_bfd
))
3372 if (contents
[roff
+ 5] == 0xb8)
3374 memcpy (contents
+ roff
- 3,
3375 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
3376 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3380 memcpy (contents
+ roff
- 4,
3381 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3385 memcpy (contents
+ roff
- 3,
3386 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3388 bfd_put_32 (output_bfd
,
3389 elf_x86_64_tpoff (info
, relocation
),
3390 contents
+ roff
+ 8 + largepic
);
3391 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
3392 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
3397 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3399 /* GDesc -> LE transition.
3400 It's originally something like:
3401 leaq x@tlsdesc(%rip), %rax
3404 movl $x@tpoff, %rax. */
3406 unsigned int val
, type
;
3408 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3409 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3410 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
3411 contents
+ roff
- 3);
3412 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
3413 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3414 contents
+ roff
- 1);
3415 bfd_put_32 (output_bfd
,
3416 elf_x86_64_tpoff (info
, relocation
),
3420 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3422 /* GDesc -> LE transition.
3427 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3428 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3431 else if (r_type
== R_X86_64_GOTTPOFF
)
3433 /* IE->LE transition:
3434 For 64bit, originally it can be one of:
3435 movq foo@gottpoff(%rip), %reg
3436 addq foo@gottpoff(%rip), %reg
3439 leaq foo(%reg), %reg
3441 For 32bit, originally it can be one of:
3442 movq foo@gottpoff(%rip), %reg
3443 addl foo@gottpoff(%rip), %reg
3446 leal foo(%reg), %reg
3449 unsigned int val
, type
, reg
;
3452 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3455 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3456 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3462 bfd_put_8 (output_bfd
, 0x49,
3463 contents
+ roff
- 3);
3464 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3465 bfd_put_8 (output_bfd
, 0x41,
3466 contents
+ roff
- 3);
3467 bfd_put_8 (output_bfd
, 0xc7,
3468 contents
+ roff
- 2);
3469 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3470 contents
+ roff
- 1);
3474 /* addq/addl -> addq/addl - addressing with %rsp/%r12
3477 bfd_put_8 (output_bfd
, 0x49,
3478 contents
+ roff
- 3);
3479 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3480 bfd_put_8 (output_bfd
, 0x41,
3481 contents
+ roff
- 3);
3482 bfd_put_8 (output_bfd
, 0x81,
3483 contents
+ roff
- 2);
3484 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3485 contents
+ roff
- 1);
3489 /* addq/addl -> leaq/leal */
3491 bfd_put_8 (output_bfd
, 0x4d,
3492 contents
+ roff
- 3);
3493 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3494 bfd_put_8 (output_bfd
, 0x45,
3495 contents
+ roff
- 3);
3496 bfd_put_8 (output_bfd
, 0x8d,
3497 contents
+ roff
- 2);
3498 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
3499 contents
+ roff
- 1);
3501 bfd_put_32 (output_bfd
,
3502 elf_x86_64_tpoff (info
, relocation
),
3510 if (htab
->elf
.sgot
== NULL
)
3515 off
= h
->got
.offset
;
3516 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
3520 if (local_got_offsets
== NULL
)
3523 off
= local_got_offsets
[r_symndx
];
3524 offplt
= local_tlsdesc_gotents
[r_symndx
];
3531 Elf_Internal_Rela outrel
;
3535 if (htab
->elf
.srelgot
== NULL
)
3538 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3540 if (GOT_TLS_GDESC_P (tls_type
))
3542 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
3543 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
3544 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
3545 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3546 + htab
->elf
.sgotplt
->output_offset
3548 + htab
->sgotplt_jump_table_size
);
3549 sreloc
= htab
->elf
.srelplt
;
3551 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3553 outrel
.r_addend
= 0;
3554 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3557 sreloc
= htab
->elf
.srelgot
;
3559 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3560 + htab
->elf
.sgot
->output_offset
+ off
);
3562 if (GOT_TLS_GD_P (tls_type
))
3563 dr_type
= R_X86_64_DTPMOD64
;
3564 else if (GOT_TLS_GDESC_P (tls_type
))
3567 dr_type
= R_X86_64_TPOFF64
;
3569 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
3570 outrel
.r_addend
= 0;
3571 if ((dr_type
== R_X86_64_TPOFF64
3572 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
3573 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3574 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
3576 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3578 if (GOT_TLS_GD_P (tls_type
))
3582 BFD_ASSERT (! unresolved_reloc
);
3583 bfd_put_64 (output_bfd
,
3584 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3585 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3589 bfd_put_64 (output_bfd
, 0,
3590 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3591 outrel
.r_info
= htab
->r_info (indx
,
3593 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
3594 elf_append_rela (output_bfd
, sreloc
,
3603 local_got_offsets
[r_symndx
] |= 1;
3606 if (off
>= (bfd_vma
) -2
3607 && ! GOT_TLS_GDESC_P (tls_type
))
3609 if (r_type_tls
== r_type
)
3611 if (r_type
== R_X86_64_GOTPC32_TLSDESC
3612 || r_type
== R_X86_64_TLSDESC_CALL
)
3613 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3614 + htab
->elf
.sgotplt
->output_offset
3615 + offplt
+ htab
->sgotplt_jump_table_size
;
3617 relocation
= htab
->elf
.sgot
->output_section
->vma
3618 + htab
->elf
.sgot
->output_offset
+ off
;
3619 unresolved_reloc
= FALSE
;
3623 bfd_vma roff
= rel
->r_offset
;
3625 if (r_type
== R_X86_64_TLSGD
)
3627 /* GD->IE transition. For 64bit, change
3628 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3629 .word 0x6666; rex64; call __tls_get_addr@PLT
3631 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3633 call *__tls_get_addr@GOTPCREL(%rip
3634 which may be converted to
3635 addr32 call __tls_get_addr
3638 addq foo@gottpoff(%rip), %rax
3640 leaq foo@tlsgd(%rip), %rdi
3641 .word 0x6666; rex64; call __tls_get_addr@PLT
3643 leaq foo@tlsgd(%rip), %rdi
3645 call *__tls_get_addr@GOTPCREL(%rip)
3646 which may be converted to
3647 addr32 call __tls_get_addr
3650 addq foo@gottpoff(%rip), %rax
3651 For largepic, change:
3652 leaq foo@tlsgd(%rip), %rdi
3653 movabsq $__tls_get_addr@pltoff, %rax
3658 addq foo@gottpoff(%rax), %rax
3659 nopw 0x0(%rax,%rax,1) */
3661 if (ABI_64_P (output_bfd
))
3663 if (contents
[roff
+ 5] == 0xb8)
3665 memcpy (contents
+ roff
- 3,
3666 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
3667 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3671 memcpy (contents
+ roff
- 4,
3672 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3676 memcpy (contents
+ roff
- 3,
3677 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3680 relocation
= (htab
->elf
.sgot
->output_section
->vma
3681 + htab
->elf
.sgot
->output_offset
+ off
3684 - input_section
->output_section
->vma
3685 - input_section
->output_offset
3687 bfd_put_32 (output_bfd
, relocation
,
3688 contents
+ roff
+ 8 + largepic
);
3689 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
3694 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3696 /* GDesc -> IE transition.
3697 It's originally something like:
3698 leaq x@tlsdesc(%rip), %rax
3701 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
3703 /* Now modify the instruction as appropriate. To
3704 turn a leaq into a movq in the form we use it, it
3705 suffices to change the second byte from 0x8d to
3707 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3709 bfd_put_32 (output_bfd
,
3710 htab
->elf
.sgot
->output_section
->vma
3711 + htab
->elf
.sgot
->output_offset
+ off
3713 - input_section
->output_section
->vma
3714 - input_section
->output_offset
3719 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3721 /* GDesc -> IE transition.
3728 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3729 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3737 case R_X86_64_TLSLD
:
3738 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3739 input_section
, contents
,
3740 symtab_hdr
, sym_hashes
,
3741 &r_type
, GOT_UNKNOWN
, rel
,
3742 relend
, h
, r_symndx
, TRUE
))
3745 if (r_type
!= R_X86_64_TLSLD
)
3747 /* LD->LE transition:
3748 leaq foo@tlsld(%rip), %rdi
3749 call __tls_get_addr@PLT
3750 For 64bit, we change it into:
3751 .word 0x6666; .byte 0x66; movq %fs:0, %rax
3752 For 32bit, we change it into:
3753 nopl 0x0(%rax); movl %fs:0, %eax
3755 leaq foo@tlsld(%rip), %rdi;
3756 call *__tls_get_addr@GOTPCREL(%rip)
3757 which may be converted to
3758 addr32 call __tls_get_addr
3759 For 64bit, we change it into:
3760 .word 0x6666; .word 0x6666; movq %fs:0, %rax
3761 For 32bit, we change it into:
3762 nopw 0x0(%rax); movl %fs:0, %eax
3763 For largepic, change:
3764 leaq foo@tlsgd(%rip), %rdi
3765 movabsq $__tls_get_addr@pltoff, %rax
3769 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
3772 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
3773 if (ABI_64_P (output_bfd
))
3775 if (contents
[rel
->r_offset
+ 5] == 0xb8)
3776 memcpy (contents
+ rel
->r_offset
- 3,
3777 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
3778 "\x64\x48\x8b\x04\x25\0\0\0", 22);
3779 else if (contents
[rel
->r_offset
+ 4] == 0xff
3780 || contents
[rel
->r_offset
+ 4] == 0x67)
3781 memcpy (contents
+ rel
->r_offset
- 3,
3782 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
3785 memcpy (contents
+ rel
->r_offset
- 3,
3786 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3790 if (contents
[rel
->r_offset
+ 4] == 0xff)
3791 memcpy (contents
+ rel
->r_offset
- 3,
3792 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
3795 memcpy (contents
+ rel
->r_offset
- 3,
3796 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
3798 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
3799 and R_X86_64_PLTOFF64. */
3805 if (htab
->elf
.sgot
== NULL
)
3808 off
= htab
->tls_ld_or_ldm_got
.offset
;
3813 Elf_Internal_Rela outrel
;
3815 if (htab
->elf
.srelgot
== NULL
)
3818 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3819 + htab
->elf
.sgot
->output_offset
+ off
);
3821 bfd_put_64 (output_bfd
, 0,
3822 htab
->elf
.sgot
->contents
+ off
);
3823 bfd_put_64 (output_bfd
, 0,
3824 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3825 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
3826 outrel
.r_addend
= 0;
3827 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
3829 htab
->tls_ld_or_ldm_got
.offset
|= 1;
3831 relocation
= htab
->elf
.sgot
->output_section
->vma
3832 + htab
->elf
.sgot
->output_offset
+ off
;
3833 unresolved_reloc
= FALSE
;
3836 case R_X86_64_DTPOFF32
:
3837 if (!bfd_link_executable (info
)
3838 || (input_section
->flags
& SEC_CODE
) == 0)
3839 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3841 relocation
= elf_x86_64_tpoff (info
, relocation
);
3844 case R_X86_64_TPOFF32
:
3845 case R_X86_64_TPOFF64
:
3846 BFD_ASSERT (bfd_link_executable (info
));
3847 relocation
= elf_x86_64_tpoff (info
, relocation
);
3850 case R_X86_64_DTPOFF64
:
3851 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
3852 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3859 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3860 because such sections are not SEC_ALLOC and thus ld.so will
3861 not process them. */
3862 if (unresolved_reloc
3863 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3865 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3866 rel
->r_offset
) != (bfd_vma
) -1)
3871 sec
= h
->root
.u
.def
.section
;
3872 if ((info
->nocopyreloc
3873 || (eh
->def_protected
3874 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
3875 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))
3876 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3877 h
, NULL
, NULL
, howto
);
3882 /* xgettext:c-format */
3883 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3888 h
->root
.root
.string
);
3894 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3895 contents
, rel
->r_offset
,
3896 relocation
, rel
->r_addend
);
3898 check_relocation_error
:
3899 if (r
!= bfd_reloc_ok
)
3904 name
= h
->root
.root
.string
;
3907 name
= bfd_elf_string_from_elf_section (input_bfd
,
3908 symtab_hdr
->sh_link
,
3913 name
= bfd_section_name (input_bfd
, sec
);
3916 if (r
== bfd_reloc_overflow
)
3918 if (converted_reloc
)
3920 info
->callbacks
->einfo
3921 (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n"));
3924 (*info
->callbacks
->reloc_overflow
)
3925 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3926 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3931 /* xgettext:c-format */
3932 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3933 input_bfd
, input_section
,
3934 rel
->r_offset
, name
, (int) r
);
3945 Elf_Internal_Shdr
*rel_hdr
;
3946 size_t deleted
= rel
- wrel
;
3948 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
3949 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3950 if (rel_hdr
->sh_size
== 0)
3952 /* It is too late to remove an empty reloc section. Leave
3954 ??? What is wrong with an empty section??? */
3955 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
3958 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
3959 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3960 input_section
->reloc_count
-= deleted
;
3966 /* Finish up dynamic symbol handling. We set the contents of various
3967 dynamic sections here. */
3970 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
3971 struct bfd_link_info
*info
,
3972 struct elf_link_hash_entry
*h
,
3973 Elf_Internal_Sym
*sym
)
3975 struct elf_x86_link_hash_table
*htab
;
3976 bfd_boolean use_plt_second
;
3977 struct elf_x86_link_hash_entry
*eh
;
3978 bfd_boolean local_undefweak
;
3980 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
3984 /* Use the second PLT section only if there is .plt section. */
3985 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
3987 eh
= (struct elf_x86_link_hash_entry
*) h
;
3988 if (eh
->no_finish_dynamic_symbol
)
3991 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3992 resolved undefined weak symbols in executable so that their
3993 references have value 0 at run-time. */
3994 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
3996 if (h
->plt
.offset
!= (bfd_vma
) -1)
3999 bfd_vma got_offset
, plt_offset
;
4000 Elf_Internal_Rela rela
;
4002 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
4003 const struct elf_backend_data
*bed
;
4004 bfd_vma plt_got_pcrel_offset
;
4006 /* When building a static executable, use .iplt, .igot.plt and
4007 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4008 if (htab
->elf
.splt
!= NULL
)
4010 plt
= htab
->elf
.splt
;
4011 gotplt
= htab
->elf
.sgotplt
;
4012 relplt
= htab
->elf
.srelplt
;
4016 plt
= htab
->elf
.iplt
;
4017 gotplt
= htab
->elf
.igotplt
;
4018 relplt
= htab
->elf
.irelplt
;
4021 /* This symbol has an entry in the procedure linkage table. Set
4023 if ((h
->dynindx
== -1
4025 && !((h
->forced_local
|| bfd_link_executable (info
))
4027 && h
->type
== STT_GNU_IFUNC
))
4033 /* Get the index in the procedure linkage table which
4034 corresponds to this symbol. This is the index of this symbol
4035 in all the symbols for which we are making plt entries. The
4036 first entry in the procedure linkage table is reserved.
4038 Get the offset into the .got table of the entry that
4039 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4040 bytes. The first three are reserved for the dynamic linker.
4042 For static executables, we don't reserve anything. */
4044 if (plt
== htab
->elf
.splt
)
4046 got_offset
= (h
->plt
.offset
/ htab
->plt
.plt_entry_size
4047 - htab
->plt
.has_plt0
);
4048 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4052 got_offset
= h
->plt
.offset
/ htab
->plt
.plt_entry_size
;
4053 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4056 /* Fill in the entry in the procedure linkage table. */
4057 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
4058 htab
->plt
.plt_entry_size
);
4061 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
4062 htab
->non_lazy_plt
->plt_entry
,
4063 htab
->non_lazy_plt
->plt_entry_size
);
4065 resolved_plt
= htab
->plt_second
;
4066 plt_offset
= eh
->plt_second
.offset
;
4071 plt_offset
= h
->plt
.offset
;
4074 /* Insert the relocation positions of the plt section. */
4076 /* Put offset the PC-relative instruction referring to the GOT entry,
4077 subtracting the size of that instruction. */
4078 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
4079 + gotplt
->output_offset
4081 - resolved_plt
->output_section
->vma
4082 - resolved_plt
->output_offset
4084 - htab
->plt
.plt_got_insn_size
);
4086 /* Check PC-relative offset overflow in PLT entry. */
4087 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
4088 /* xgettext:c-format */
4089 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
4090 output_bfd
, h
->root
.root
.string
);
4092 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
4093 (resolved_plt
->contents
+ plt_offset
4094 + htab
->plt
.plt_got_offset
));
4096 /* Fill in the entry in the global offset table, initially this
4097 points to the second part of the PLT entry. Leave the entry
4098 as zero for undefined weak symbol in PIE. No PLT relocation
4099 against undefined weak symbol in PIE. */
4100 if (!local_undefweak
)
4102 if (htab
->plt
.has_plt0
)
4103 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4104 + plt
->output_offset
4106 + htab
->lazy_plt
->plt_lazy_offset
),
4107 gotplt
->contents
+ got_offset
);
4109 /* Fill in the entry in the .rela.plt section. */
4110 rela
.r_offset
= (gotplt
->output_section
->vma
4111 + gotplt
->output_offset
4113 if (h
->dynindx
== -1
4114 || ((bfd_link_executable (info
)
4115 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4117 && h
->type
== STT_GNU_IFUNC
))
4119 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
4120 h
->root
.root
.string
,
4121 h
->root
.u
.def
.section
->owner
);
4123 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4124 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4125 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4126 rela
.r_addend
= (h
->root
.u
.def
.value
4127 + h
->root
.u
.def
.section
->output_section
->vma
4128 + h
->root
.u
.def
.section
->output_offset
);
4129 /* R_X86_64_IRELATIVE comes last. */
4130 plt_index
= htab
->next_irelative_index
--;
4134 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4136 plt_index
= htab
->next_jump_slot_index
++;
4139 /* Don't fill the second and third slots in PLT entry for
4140 static executables nor without PLT0. */
4141 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
4144 = h
->plt
.offset
+ htab
->lazy_plt
->plt_plt_insn_end
;
4146 /* Put relocation index. */
4147 bfd_put_32 (output_bfd
, plt_index
,
4148 (plt
->contents
+ h
->plt
.offset
4149 + htab
->lazy_plt
->plt_reloc_offset
));
4151 /* Put offset for jmp .PLT0 and check for overflow. We don't
4152 check relocation index for overflow since branch displacement
4153 will overflow first. */
4154 if (plt0_offset
> 0x80000000)
4155 /* xgettext:c-format */
4156 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
4157 output_bfd
, h
->root
.root
.string
);
4158 bfd_put_32 (output_bfd
, - plt0_offset
,
4159 (plt
->contents
+ h
->plt
.offset
4160 + htab
->lazy_plt
->plt_plt_offset
));
4163 bed
= get_elf_backend_data (output_bfd
);
4164 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4165 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4168 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4170 bfd_vma got_offset
, plt_offset
;
4171 asection
*plt
, *got
;
4172 bfd_boolean got_after_plt
;
4173 int32_t got_pcrel_offset
;
4175 /* Set the entry in the GOT procedure linkage table. */
4176 plt
= htab
->plt_got
;
4177 got
= htab
->elf
.sgot
;
4178 got_offset
= h
->got
.offset
;
4180 if (got_offset
== (bfd_vma
) -1
4181 || (h
->type
== STT_GNU_IFUNC
&& h
->def_regular
)
4186 /* Use the non-lazy PLT entry template for the GOT PLT since they
4187 are the identical. */
4188 /* Fill in the entry in the GOT procedure linkage table. */
4189 plt_offset
= eh
->plt_got
.offset
;
4190 memcpy (plt
->contents
+ plt_offset
,
4191 htab
->non_lazy_plt
->plt_entry
,
4192 htab
->non_lazy_plt
->plt_entry_size
);
4194 /* Put offset the PC-relative instruction referring to the GOT
4195 entry, subtracting the size of that instruction. */
4196 got_pcrel_offset
= (got
->output_section
->vma
4197 + got
->output_offset
4199 - plt
->output_section
->vma
4200 - plt
->output_offset
4202 - htab
->non_lazy_plt
->plt_got_insn_size
);
4204 /* Check PC-relative offset overflow in GOT PLT entry. */
4205 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
4206 if ((got_after_plt
&& got_pcrel_offset
< 0)
4207 || (!got_after_plt
&& got_pcrel_offset
> 0))
4208 /* xgettext:c-format */
4209 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
4210 output_bfd
, h
->root
.root
.string
);
4212 bfd_put_32 (output_bfd
, got_pcrel_offset
,
4213 (plt
->contents
+ plt_offset
4214 + htab
->non_lazy_plt
->plt_got_offset
));
4217 if (!local_undefweak
4219 && (h
->plt
.offset
!= (bfd_vma
) -1
4220 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4222 /* Mark the symbol as undefined, rather than as defined in
4223 the .plt section. Leave the value if there were any
4224 relocations where pointer equality matters (this is a clue
4225 for the dynamic linker, to make function pointer
4226 comparisons work between an application and shared
4227 library), otherwise set it to zero. If a function is only
4228 called from a binary, there is no need to slow down
4229 shared libraries because of that. */
4230 sym
->st_shndx
= SHN_UNDEF
;
4231 if (!h
->pointer_equality_needed
)
4235 /* Don't generate dynamic GOT relocation against undefined weak
4236 symbol in executable. */
4237 if (h
->got
.offset
!= (bfd_vma
) -1
4238 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h
)->tls_type
)
4239 && elf_x86_hash_entry (h
)->tls_type
!= GOT_TLS_IE
4240 && !local_undefweak
)
4242 Elf_Internal_Rela rela
;
4243 asection
*relgot
= htab
->elf
.srelgot
;
4245 /* This symbol has an entry in the global offset table. Set it
4247 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4250 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4251 + htab
->elf
.sgot
->output_offset
4252 + (h
->got
.offset
&~ (bfd_vma
) 1));
4254 /* If this is a static link, or it is a -Bsymbolic link and the
4255 symbol is defined locally or was forced to be local because
4256 of a version file, we just want to emit a RELATIVE reloc.
4257 The entry in the global offset table will already have been
4258 initialized in the relocate_section function. */
4260 && h
->type
== STT_GNU_IFUNC
)
4262 if (h
->plt
.offset
== (bfd_vma
) -1)
4264 /* STT_GNU_IFUNC is referenced without PLT. */
4265 if (htab
->elf
.splt
== NULL
)
4267 /* use .rel[a].iplt section to store .got relocations
4268 in static executable. */
4269 relgot
= htab
->elf
.irelplt
;
4271 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4273 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
4274 h
->root
.root
.string
,
4275 h
->root
.u
.def
.section
->owner
);
4277 rela
.r_info
= htab
->r_info (0,
4278 R_X86_64_IRELATIVE
);
4279 rela
.r_addend
= (h
->root
.u
.def
.value
4280 + h
->root
.u
.def
.section
->output_section
->vma
4281 + h
->root
.u
.def
.section
->output_offset
);
4286 else if (bfd_link_pic (info
))
4288 /* Generate R_X86_64_GLOB_DAT. */
4296 if (!h
->pointer_equality_needed
)
4299 /* For non-shared object, we can't use .got.plt, which
4300 contains the real function addres if we need pointer
4301 equality. We load the GOT entry with the PLT entry. */
4302 if (htab
->plt_second
!= NULL
)
4304 plt
= htab
->plt_second
;
4305 plt_offset
= eh
->plt_second
.offset
;
4309 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4310 plt_offset
= h
->plt
.offset
;
4312 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4313 + plt
->output_offset
4315 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4319 else if (bfd_link_pic (info
)
4320 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4322 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
4324 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4325 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4326 rela
.r_addend
= (h
->root
.u
.def
.value
4327 + h
->root
.u
.def
.section
->output_section
->vma
4328 + h
->root
.u
.def
.section
->output_offset
);
4332 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4334 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4335 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4336 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4340 elf_append_rela (output_bfd
, relgot
, &rela
);
4345 Elf_Internal_Rela rela
;
4348 /* This symbol needs a copy reloc. Set it up. */
4350 if (h
->dynindx
== -1
4351 || (h
->root
.type
!= bfd_link_hash_defined
4352 && h
->root
.type
!= bfd_link_hash_defweak
)
4353 || htab
->elf
.srelbss
== NULL
4354 || htab
->elf
.sreldynrelro
== NULL
)
4357 rela
.r_offset
= (h
->root
.u
.def
.value
4358 + h
->root
.u
.def
.section
->output_section
->vma
4359 + h
->root
.u
.def
.section
->output_offset
);
4360 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4362 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
4363 s
= htab
->elf
.sreldynrelro
;
4365 s
= htab
->elf
.srelbss
;
4366 elf_append_rela (output_bfd
, s
, &rela
);
4372 /* Finish up local dynamic symbol handling. We set the contents of
4373 various dynamic sections here. */
4376 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4378 struct elf_link_hash_entry
*h
4379 = (struct elf_link_hash_entry
*) *slot
;
4380 struct bfd_link_info
*info
4381 = (struct bfd_link_info
*) inf
;
4383 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4387 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4388 here since undefined weak symbol may not be dynamic and may not be
4389 called for elf_x86_64_finish_dynamic_symbol. */
4392 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
4395 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
4396 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
4398 if (h
->root
.type
!= bfd_link_hash_undefweak
4399 || h
->dynindx
!= -1)
4402 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4406 /* Used to decide how to sort relocs in an optimal manner for the
4407 dynamic linker, before writing them out. */
4409 static enum elf_reloc_type_class
4410 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info
,
4411 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4412 const Elf_Internal_Rela
*rela
)
4414 bfd
*abfd
= info
->output_bfd
;
4415 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4416 struct elf_x86_link_hash_table
*htab
4417 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4419 if (htab
->elf
.dynsym
!= NULL
4420 && htab
->elf
.dynsym
->contents
!= NULL
)
4422 /* Check relocation against STT_GNU_IFUNC symbol if there are
4424 unsigned long r_symndx
= htab
->r_sym (rela
->r_info
);
4425 if (r_symndx
!= STN_UNDEF
)
4427 Elf_Internal_Sym sym
;
4428 if (!bed
->s
->swap_symbol_in (abfd
,
4429 (htab
->elf
.dynsym
->contents
4430 + r_symndx
* bed
->s
->sizeof_sym
),
4434 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
4435 return reloc_class_ifunc
;
4439 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4441 case R_X86_64_IRELATIVE
:
4442 return reloc_class_ifunc
;
4443 case R_X86_64_RELATIVE
:
4444 case R_X86_64_RELATIVE64
:
4445 return reloc_class_relative
;
4446 case R_X86_64_JUMP_SLOT
:
4447 return reloc_class_plt
;
4449 return reloc_class_copy
;
4451 return reloc_class_normal
;
4455 /* Finish up the dynamic sections. */
4458 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4459 struct bfd_link_info
*info
)
4461 struct elf_x86_link_hash_table
*htab
;
4465 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4469 dynobj
= htab
->elf
.dynobj
;
4470 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4472 if (htab
->elf
.dynamic_sections_created
)
4474 bfd_byte
*dyncon
, *dynconend
;
4475 const struct elf_backend_data
*bed
;
4476 bfd_size_type sizeof_dyn
;
4478 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4481 bed
= get_elf_backend_data (dynobj
);
4482 sizeof_dyn
= bed
->s
->sizeof_dyn
;
4483 dyncon
= sdyn
->contents
;
4484 dynconend
= sdyn
->contents
+ sdyn
->size
;
4485 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
4487 Elf_Internal_Dyn dyn
;
4490 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
4498 s
= htab
->elf
.sgotplt
;
4499 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4503 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
4507 s
= htab
->elf
.srelplt
->output_section
;
4508 dyn
.d_un
.d_val
= s
->size
;
4511 case DT_TLSDESC_PLT
:
4513 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4514 + htab
->tlsdesc_plt
;
4517 case DT_TLSDESC_GOT
:
4519 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4520 + htab
->tlsdesc_got
;
4524 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
4527 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4529 elf_section_data (htab
->elf
.splt
->output_section
)
4530 ->this_hdr
.sh_entsize
= htab
->plt
.plt_entry_size
;
4532 if (htab
->plt
.has_plt0
)
4534 /* Fill in the special first entry in the procedure linkage
4536 memcpy (htab
->elf
.splt
->contents
,
4537 htab
->lazy_plt
->plt0_entry
,
4538 htab
->lazy_plt
->plt0_entry_size
);
4539 /* Add offset for pushq GOT+8(%rip), since the instruction
4540 uses 6 bytes subtract this value. */
4541 bfd_put_32 (output_bfd
,
4542 (htab
->elf
.sgotplt
->output_section
->vma
4543 + htab
->elf
.sgotplt
->output_offset
4545 - htab
->elf
.splt
->output_section
->vma
4546 - htab
->elf
.splt
->output_offset
4548 (htab
->elf
.splt
->contents
4549 + htab
->lazy_plt
->plt0_got1_offset
));
4550 /* Add offset for the PC-relative instruction accessing
4551 GOT+16, subtracting the offset to the end of that
4553 bfd_put_32 (output_bfd
,
4554 (htab
->elf
.sgotplt
->output_section
->vma
4555 + htab
->elf
.sgotplt
->output_offset
4557 - htab
->elf
.splt
->output_section
->vma
4558 - htab
->elf
.splt
->output_offset
4559 - htab
->lazy_plt
->plt0_got2_insn_end
),
4560 (htab
->elf
.splt
->contents
4561 + htab
->lazy_plt
->plt0_got2_offset
));
4563 if (htab
->tlsdesc_plt
)
4565 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4566 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
4568 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
4569 htab
->lazy_plt
->plt0_entry
,
4570 htab
->lazy_plt
->plt0_entry_size
);
4572 /* Add offset for pushq GOT+8(%rip), since the
4573 instruction uses 6 bytes subtract this value. */
4574 bfd_put_32 (output_bfd
,
4575 (htab
->elf
.sgotplt
->output_section
->vma
4576 + htab
->elf
.sgotplt
->output_offset
4578 - htab
->elf
.splt
->output_section
->vma
4579 - htab
->elf
.splt
->output_offset
4582 (htab
->elf
.splt
->contents
4584 + htab
->lazy_plt
->plt0_got1_offset
));
4585 /* Add offset for the PC-relative instruction accessing
4586 GOT+TDG, where TDG stands for htab->tlsdesc_got,
4587 subtracting the offset to the end of that
4589 bfd_put_32 (output_bfd
,
4590 (htab
->elf
.sgot
->output_section
->vma
4591 + htab
->elf
.sgot
->output_offset
4593 - htab
->elf
.splt
->output_section
->vma
4594 - htab
->elf
.splt
->output_offset
4596 - htab
->lazy_plt
->plt0_got2_insn_end
),
4597 (htab
->elf
.splt
->contents
4599 + htab
->lazy_plt
->plt0_got2_offset
));
4604 if (htab
->plt_got
!= NULL
&& htab
->plt_got
->size
> 0)
4605 elf_section_data (htab
->plt_got
->output_section
)
4606 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
4608 if (htab
->plt_second
!= NULL
&& htab
->plt_second
->size
> 0)
4609 elf_section_data (htab
->plt_second
->output_section
)
4610 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
4613 /* GOT is always created in setup_gnu_properties. But it may not be
4615 if (htab
->elf
.sgotplt
&& htab
->elf
.sgotplt
->size
> 0)
4617 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4620 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4624 /* Set the first entry in the global offset table to the address of
4625 the dynamic section. */
4627 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
4629 bfd_put_64 (output_bfd
,
4630 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
4631 htab
->elf
.sgotplt
->contents
);
4632 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4633 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4634 htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
4635 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4636 htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
4638 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
4642 /* Adjust .eh_frame for .plt section. */
4643 if (htab
->plt_eh_frame
!= NULL
4644 && htab
->plt_eh_frame
->contents
!= NULL
)
4646 if (htab
->elf
.splt
!= NULL
4647 && htab
->elf
.splt
->size
!= 0
4648 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4649 && htab
->elf
.splt
->output_section
!= NULL
4650 && htab
->plt_eh_frame
->output_section
!= NULL
)
4652 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4653 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4654 + htab
->plt_eh_frame
->output_offset
4655 + PLT_FDE_START_OFFSET
;
4656 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4657 htab
->plt_eh_frame
->contents
4658 + PLT_FDE_START_OFFSET
);
4660 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4662 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4664 htab
->plt_eh_frame
->contents
))
4669 /* Adjust .eh_frame for .plt.got section. */
4670 if (htab
->plt_got_eh_frame
!= NULL
4671 && htab
->plt_got_eh_frame
->contents
!= NULL
)
4673 if (htab
->plt_got
!= NULL
4674 && htab
->plt_got
->size
!= 0
4675 && (htab
->plt_got
->flags
& SEC_EXCLUDE
) == 0
4676 && htab
->plt_got
->output_section
!= NULL
4677 && htab
->plt_got_eh_frame
->output_section
!= NULL
)
4679 bfd_vma plt_start
= htab
->plt_got
->output_section
->vma
;
4680 bfd_vma eh_frame_start
= htab
->plt_got_eh_frame
->output_section
->vma
4681 + htab
->plt_got_eh_frame
->output_offset
4682 + PLT_FDE_START_OFFSET
;
4683 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4684 htab
->plt_got_eh_frame
->contents
4685 + PLT_FDE_START_OFFSET
);
4687 if (htab
->plt_got_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4689 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4690 htab
->plt_got_eh_frame
,
4691 htab
->plt_got_eh_frame
->contents
))
4696 /* Adjust .eh_frame for the second PLT section. */
4697 if (htab
->plt_second_eh_frame
!= NULL
4698 && htab
->plt_second_eh_frame
->contents
!= NULL
)
4700 if (htab
->plt_second
!= NULL
4701 && htab
->plt_second
->size
!= 0
4702 && (htab
->plt_second
->flags
& SEC_EXCLUDE
) == 0
4703 && htab
->plt_second
->output_section
!= NULL
4704 && htab
->plt_second_eh_frame
->output_section
!= NULL
)
4706 bfd_vma plt_start
= htab
->plt_second
->output_section
->vma
;
4707 bfd_vma eh_frame_start
4708 = (htab
->plt_second_eh_frame
->output_section
->vma
4709 + htab
->plt_second_eh_frame
->output_offset
4710 + PLT_FDE_START_OFFSET
);
4711 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4712 htab
->plt_second_eh_frame
->contents
4713 + PLT_FDE_START_OFFSET
);
4715 if (htab
->plt_second_eh_frame
->sec_info_type
4716 == SEC_INFO_TYPE_EH_FRAME
)
4718 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4719 htab
->plt_second_eh_frame
,
4720 htab
->plt_second_eh_frame
->contents
))
4725 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4726 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
4729 /* Fill PLT entries for undefined weak symbols in PIE. */
4730 if (bfd_link_pie (info
))
4731 bfd_hash_traverse (&info
->hash
->table
,
4732 elf_x86_64_pie_finish_undefweak_symbol
,
4738 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4739 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4740 It has to be done before elf_link_sort_relocs is called so that
4741 dynamic relocations are properly sorted. */
4744 elf_x86_64_output_arch_local_syms
4745 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4746 struct bfd_link_info
*info
,
4747 void *flaginfo ATTRIBUTE_UNUSED
,
4748 int (*func
) (void *, const char *,
4751 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
4753 struct elf_x86_link_hash_table
*htab
4754 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4758 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4759 htab_traverse (htab
->loc_hash_table
,
4760 elf_x86_64_finish_local_dynamic_symbol
,
4766 /* Forward declaration. */
4767 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
;
4769 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4770 dynamic relocations. */
4773 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
4774 long symcount ATTRIBUTE_UNUSED
,
4775 asymbol
**syms ATTRIBUTE_UNUSED
,
4782 bfd_byte
*plt_contents
;
4784 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
4785 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
4786 const struct elf_x86_lazy_plt_layout
*lazy_bnd_plt
;
4787 const struct elf_x86_non_lazy_plt_layout
*non_lazy_bnd_plt
;
4788 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
4789 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
4791 enum elf_x86_plt_type plt_type
;
4792 struct elf_x86_plt plts
[] =
4794 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
4795 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
4796 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4797 { ".plt.bnd", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4798 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
4803 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
4806 if (dynsymcount
<= 0)
4809 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
4813 if (get_elf_x86_64_backend_data (abfd
)->os
== is_normal
)
4815 lazy_plt
= &elf_x86_64_lazy_plt
;
4816 non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
4817 lazy_bnd_plt
= &elf_x86_64_lazy_bnd_plt
;
4818 non_lazy_bnd_plt
= &elf_x86_64_non_lazy_bnd_plt
;
4819 if (ABI_64_P (abfd
))
4821 lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
4822 non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
4826 lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
4827 non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
4832 lazy_plt
= &elf_x86_64_nacl_plt
;
4833 non_lazy_plt
= NULL
;
4834 lazy_bnd_plt
= NULL
;
4835 non_lazy_bnd_plt
= NULL
;
4836 lazy_ibt_plt
= NULL
;
4837 non_lazy_ibt_plt
= NULL
;
4841 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
4843 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
4844 if (plt
== NULL
|| plt
->size
== 0)
4847 /* Get the PLT section contents. */
4848 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
4849 if (plt_contents
== NULL
)
4851 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
4852 plt_contents
, 0, plt
->size
))
4854 free (plt_contents
);
4858 /* Check what kind of PLT it is. */
4859 plt_type
= plt_unknown
;
4860 if (plts
[j
].type
== plt_unknown
4861 && (plt
->size
>= (lazy_plt
->plt_entry_size
4862 + lazy_plt
->plt_entry_size
)))
4864 /* Match lazy PLT first. Need to check the first two
4866 if ((memcmp (plt_contents
, lazy_plt
->plt0_entry
,
4867 lazy_plt
->plt0_got1_offset
) == 0)
4868 && (memcmp (plt_contents
+ 6, lazy_plt
->plt0_entry
+ 6,
4870 plt_type
= plt_lazy
;
4871 else if (lazy_bnd_plt
!= NULL
4872 && (memcmp (plt_contents
, lazy_bnd_plt
->plt0_entry
,
4873 lazy_bnd_plt
->plt0_got1_offset
) == 0)
4874 && (memcmp (plt_contents
+ 6,
4875 lazy_bnd_plt
->plt0_entry
+ 6, 3) == 0))
4877 plt_type
= plt_lazy
| plt_second
;
4878 /* The fist entry in the lazy IBT PLT is the same as the
4880 if ((memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
4881 lazy_ibt_plt
->plt_entry
,
4882 lazy_ibt_plt
->plt_got_offset
) == 0))
4883 lazy_plt
= lazy_ibt_plt
;
4885 lazy_plt
= lazy_bnd_plt
;
4889 if (non_lazy_plt
!= NULL
4890 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
4891 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
4893 /* Match non-lazy PLT. */
4894 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
4895 non_lazy_plt
->plt_got_offset
) == 0)
4896 plt_type
= plt_non_lazy
;
4899 if (plt_type
== plt_unknown
|| plt_type
== plt_second
)
4901 if (non_lazy_bnd_plt
!= NULL
4902 && plt
->size
>= non_lazy_bnd_plt
->plt_entry_size
4903 && (memcmp (plt_contents
, non_lazy_bnd_plt
->plt_entry
,
4904 non_lazy_bnd_plt
->plt_got_offset
) == 0))
4906 /* Match BND PLT. */
4907 plt_type
= plt_second
;
4908 non_lazy_plt
= non_lazy_bnd_plt
;
4910 else if (non_lazy_ibt_plt
!= NULL
4911 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
4912 && (memcmp (plt_contents
,
4913 non_lazy_ibt_plt
->plt_entry
,
4914 non_lazy_ibt_plt
->plt_got_offset
) == 0))
4916 /* Match IBT PLT. */
4917 plt_type
= plt_second
;
4918 non_lazy_plt
= non_lazy_ibt_plt
;
4922 if (plt_type
== plt_unknown
)
4924 free (plt_contents
);
4929 plts
[j
].type
= plt_type
;
4931 if ((plt_type
& plt_lazy
))
4933 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
4934 plts
[j
].plt_got_insn_size
= lazy_plt
->plt_got_insn_size
;
4935 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
4936 /* Skip PLT0 in lazy PLT. */
4941 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
4942 plts
[j
].plt_got_insn_size
= non_lazy_plt
->plt_got_insn_size
;
4943 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
4947 /* Skip lazy PLT when the second PLT is used. */
4948 if (plt_type
== (plt_lazy
| plt_second
))
4952 n
= plt
->size
/ plts
[j
].plt_entry_size
;
4957 plts
[j
].contents
= plt_contents
;
4960 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
4961 (bfd_vma
) 0, plts
, dynsyms
,
4965 /* Handle an x86-64 specific section when reading an object file. This
4966 is called when elfcode.h finds a section with an unknown type. */
4969 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
4970 const char *name
, int shindex
)
4972 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4975 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4981 /* Hook called by the linker routine which adds symbols from an object
4982 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4986 elf_x86_64_add_symbol_hook (bfd
*abfd
,
4987 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4988 Elf_Internal_Sym
*sym
,
4989 const char **namep ATTRIBUTE_UNUSED
,
4990 flagword
*flagsp ATTRIBUTE_UNUSED
,
4996 switch (sym
->st_shndx
)
4998 case SHN_X86_64_LCOMMON
:
4999 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5002 lcomm
= bfd_make_section_with_flags (abfd
,
5006 | SEC_LINKER_CREATED
));
5009 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5012 *valp
= sym
->st_size
;
5020 /* Given a BFD section, try to locate the corresponding ELF section
5024 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5025 asection
*sec
, int *index_return
)
5027 if (sec
== &_bfd_elf_large_com_section
)
5029 *index_return
= SHN_X86_64_LCOMMON
;
5035 /* Process a symbol. */
5038 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5041 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5043 switch (elfsym
->internal_elf_sym
.st_shndx
)
5045 case SHN_X86_64_LCOMMON
:
5046 asym
->section
= &_bfd_elf_large_com_section
;
5047 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5048 /* Common symbol doesn't set BSF_GLOBAL. */
5049 asym
->flags
&= ~BSF_GLOBAL
;
5055 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5057 return (sym
->st_shndx
== SHN_COMMON
5058 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5062 elf_x86_64_common_section_index (asection
*sec
)
5064 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5067 return SHN_X86_64_LCOMMON
;
5071 elf_x86_64_common_section (asection
*sec
)
5073 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5074 return bfd_com_section_ptr
;
5076 return &_bfd_elf_large_com_section
;
5080 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5081 const Elf_Internal_Sym
*sym
,
5086 const asection
*oldsec
)
5088 /* A normal common symbol and a large common symbol result in a
5089 normal common symbol. We turn the large common symbol into a
5092 && h
->root
.type
== bfd_link_hash_common
5094 && bfd_is_com_section (*psec
)
5097 if (sym
->st_shndx
== SHN_COMMON
5098 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5100 h
->root
.u
.c
.p
->section
5101 = bfd_make_section_old_way (oldbfd
, "COMMON");
5102 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5104 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5105 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5106 *psec
= bfd_com_section_ptr
;
5113 elf_x86_64_additional_program_headers (bfd
*abfd
,
5114 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5119 /* Check to see if we need a large readonly segment. */
5120 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5121 if (s
&& (s
->flags
& SEC_LOAD
))
5124 /* Check to see if we need a large data segment. Since .lbss sections
5125 is placed right after the .bss section, there should be no need for
5126 a large data segment just because of .lbss. */
5127 s
= bfd_get_section_by_name (abfd
, ".ldata");
5128 if (s
&& (s
->flags
& SEC_LOAD
))
5134 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5137 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5138 const bfd_target
*output
)
5140 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5141 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5142 && _bfd_elf_relocs_compatible (input
, output
));
5145 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
5146 with GNU properties if found. Otherwise, return NULL. */
5149 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info
*info
)
5151 struct elf_x86_init_table init_table
;
5153 if ((int) R_X86_64_standard
>= (int) R_X86_64_converted_reloc_bit
5154 || (int) R_X86_64_max
<= (int) R_X86_64_converted_reloc_bit
5155 || ((int) (R_X86_64_GNU_VTINHERIT
| R_X86_64_converted_reloc_bit
)
5156 != (int) R_X86_64_GNU_VTINHERIT
)
5157 || ((int) (R_X86_64_GNU_VTENTRY
| R_X86_64_converted_reloc_bit
)
5158 != (int) R_X86_64_GNU_VTENTRY
))
5161 init_table
.is_vxworks
= FALSE
;
5162 if (get_elf_x86_64_backend_data (info
->output_bfd
)->os
== is_normal
)
5166 init_table
.lazy_plt
= &elf_x86_64_lazy_bnd_plt
;
5167 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_bnd_plt
;
5171 init_table
.lazy_plt
= &elf_x86_64_lazy_plt
;
5172 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
5175 if (ABI_64_P (info
->output_bfd
))
5177 init_table
.lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
5178 init_table
.non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
5182 init_table
.lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
5183 init_table
.non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
5185 init_table
.normal_target
= TRUE
;
5189 init_table
.lazy_plt
= &elf_x86_64_nacl_plt
;
5190 init_table
.non_lazy_plt
= NULL
;
5191 init_table
.lazy_ibt_plt
= NULL
;
5192 init_table
.non_lazy_ibt_plt
= NULL
;
5193 init_table
.normal_target
= FALSE
;
5196 if (ABI_64_P (info
->output_bfd
))
5198 init_table
.r_info
= elf64_r_info
;
5199 init_table
.r_sym
= elf64_r_sym
;
5203 init_table
.r_info
= elf32_r_info
;
5204 init_table
.r_sym
= elf32_r_sym
;
5207 return _bfd_x86_elf_link_setup_gnu_properties (info
, &init_table
);
5210 static const struct bfd_elf_special_section
5211 elf_x86_64_special_sections
[]=
5213 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5214 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5215 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5216 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5217 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5218 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5219 { NULL
, 0, 0, 0, 0 }
5222 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5223 #define TARGET_LITTLE_NAME "elf64-x86-64"
5224 #define ELF_ARCH bfd_arch_i386
5225 #define ELF_TARGET_ID X86_64_ELF_DATA
5226 #define ELF_MACHINE_CODE EM_X86_64
5227 #define ELF_MAXPAGESIZE 0x200000
5228 #define ELF_MINPAGESIZE 0x1000
5229 #define ELF_COMMONPAGESIZE 0x1000
5231 #define elf_backend_can_gc_sections 1
5232 #define elf_backend_can_refcount 1
5233 #define elf_backend_want_got_plt 1
5234 #define elf_backend_plt_readonly 1
5235 #define elf_backend_want_plt_sym 0
5236 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5237 #define elf_backend_rela_normal 1
5238 #define elf_backend_plt_alignment 4
5239 #define elf_backend_extern_protected_data 1
5240 #define elf_backend_caches_rawsize 1
5241 #define elf_backend_dtrel_excludes_plt 1
5242 #define elf_backend_want_dynrelro 1
5244 #define elf_info_to_howto elf_x86_64_info_to_howto
5246 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5247 #define bfd_elf64_bfd_reloc_name_lookup \
5248 elf_x86_64_reloc_name_lookup
5250 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5251 #define elf_backend_check_relocs elf_x86_64_check_relocs
5252 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5253 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5254 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5255 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
5256 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5257 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5259 #define elf_backend_write_core_note elf_x86_64_write_core_note
5261 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5262 #define elf_backend_relocate_section elf_x86_64_relocate_section
5263 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5264 #define elf_backend_object_p elf64_x86_64_elf_object_p
5265 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5267 #define elf_backend_section_from_shdr \
5268 elf_x86_64_section_from_shdr
5270 #define elf_backend_section_from_bfd_section \
5271 elf_x86_64_elf_section_from_bfd_section
5272 #define elf_backend_add_symbol_hook \
5273 elf_x86_64_add_symbol_hook
5274 #define elf_backend_symbol_processing \
5275 elf_x86_64_symbol_processing
5276 #define elf_backend_common_section_index \
5277 elf_x86_64_common_section_index
5278 #define elf_backend_common_section \
5279 elf_x86_64_common_section
5280 #define elf_backend_common_definition \
5281 elf_x86_64_common_definition
5282 #define elf_backend_merge_symbol \
5283 elf_x86_64_merge_symbol
5284 #define elf_backend_special_sections \
5285 elf_x86_64_special_sections
5286 #define elf_backend_additional_program_headers \
5287 elf_x86_64_additional_program_headers
5288 #define elf_backend_setup_gnu_properties \
5289 elf_x86_64_link_setup_gnu_properties
5291 #include "elf64-target.h"
5293 /* CloudABI support. */
5295 #undef TARGET_LITTLE_SYM
5296 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5297 #undef TARGET_LITTLE_NAME
5298 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5301 #define ELF_OSABI ELFOSABI_CLOUDABI
5304 #define elf64_bed elf64_x86_64_cloudabi_bed
5306 #include "elf64-target.h"
5308 /* FreeBSD support. */
5310 #undef TARGET_LITTLE_SYM
5311 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5312 #undef TARGET_LITTLE_NAME
5313 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5316 #define ELF_OSABI ELFOSABI_FREEBSD
5319 #define elf64_bed elf64_x86_64_fbsd_bed
5321 #include "elf64-target.h"
5323 /* Solaris 2 support. */
5325 #undef TARGET_LITTLE_SYM
5326 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5327 #undef TARGET_LITTLE_NAME
5328 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5330 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5331 objects won't be recognized. */
5335 #define elf64_bed elf64_x86_64_sol2_bed
5337 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5339 #undef elf_backend_static_tls_alignment
5340 #define elf_backend_static_tls_alignment 16
5342 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5344 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5346 #undef elf_backend_want_plt_sym
5347 #define elf_backend_want_plt_sym 1
5349 #undef elf_backend_strtab_flags
5350 #define elf_backend_strtab_flags SHF_STRINGS
5353 elf64_x86_64_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
5354 bfd
*obfd ATTRIBUTE_UNUSED
,
5355 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
5356 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
5358 /* PR 19938: FIXME: Need to add code for setting the sh_info
5359 and sh_link fields of Solaris specific section types. */
5363 #undef elf_backend_copy_special_section_fields
5364 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
5366 #include "elf64-target.h"
5368 /* Native Client support. */
5371 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
5373 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5374 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
5378 #undef TARGET_LITTLE_SYM
5379 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
5380 #undef TARGET_LITTLE_NAME
5381 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5383 #define elf64_bed elf64_x86_64_nacl_bed
5385 #undef ELF_MAXPAGESIZE
5386 #undef ELF_MINPAGESIZE
5387 #undef ELF_COMMONPAGESIZE
5388 #define ELF_MAXPAGESIZE 0x10000
5389 #define ELF_MINPAGESIZE 0x10000
5390 #define ELF_COMMONPAGESIZE 0x10000
5392 /* Restore defaults. */
5394 #undef elf_backend_static_tls_alignment
5395 #undef elf_backend_want_plt_sym
5396 #define elf_backend_want_plt_sym 0
5397 #undef elf_backend_strtab_flags
5398 #undef elf_backend_copy_special_section_fields
5400 /* NaCl uses substantially different PLT entries for the same effects. */
5402 #undef elf_backend_plt_alignment
5403 #define elf_backend_plt_alignment 5
5404 #define NACL_PLT_ENTRY_SIZE 64
5405 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5407 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
5409 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5410 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5411 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5412 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5413 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5415 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5416 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
5418 /* 32 bytes of nop to pad out to the standard size. */
5419 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5420 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5421 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5422 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5423 0x66, /* excess data16 prefix */
5427 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5429 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5430 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5431 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5432 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5434 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5435 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5436 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5438 /* Lazy GOT entries point here (32-byte aligned). */
5439 0x68, /* pushq immediate */
5440 0, 0, 0, 0, /* replaced with index into relocation table. */
5441 0xe9, /* jmp relative */
5442 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5444 /* 22 bytes of nop to pad out to the standard size. */
5445 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5446 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5447 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5450 /* .eh_frame covering the .plt section. */
5452 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
5454 #if (PLT_CIE_LENGTH != 20 \
5455 || PLT_FDE_LENGTH != 36 \
5456 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5457 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5458 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5460 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5461 0, 0, 0, 0, /* CIE ID */
5462 1, /* CIE version */
5463 'z', 'R', 0, /* Augmentation string */
5464 1, /* Code alignment factor */
5465 0x78, /* Data alignment factor */
5466 16, /* Return address column */
5467 1, /* Augmentation size */
5468 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5469 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5470 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5471 DW_CFA_nop
, DW_CFA_nop
,
5473 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5474 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
5475 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5476 0, 0, 0, 0, /* .plt size goes here */
5477 0, /* Augmentation size */
5478 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
5479 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5480 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
5481 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5482 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5483 13, /* Block length */
5484 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
5485 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
5486 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5487 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
5488 DW_CFA_nop
, DW_CFA_nop
5491 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
=
5493 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
5494 NACL_PLT_ENTRY_SIZE
, /* plt0_entry_size */
5495 elf_x86_64_nacl_plt_entry
, /* plt_entry */
5496 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5497 2, /* plt0_got1_offset */
5498 9, /* plt0_got2_offset */
5499 13, /* plt0_got2_insn_end */
5500 3, /* plt_got_offset */
5501 33, /* plt_reloc_offset */
5502 38, /* plt_plt_offset */
5503 7, /* plt_got_insn_size */
5504 42, /* plt_plt_insn_end */
5505 32, /* plt_lazy_offset */
5506 elf_x86_64_nacl_plt0_entry
, /* pic_plt0_entry */
5507 elf_x86_64_nacl_plt_entry
, /* pic_plt_entry */
5508 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
5509 sizeof (elf_x86_64_nacl_eh_frame_plt
) /* eh_frame_plt_size */
5512 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
5517 #undef elf_backend_arch_data
5518 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5520 #undef elf_backend_object_p
5521 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5522 #undef elf_backend_modify_segment_map
5523 #define elf_backend_modify_segment_map nacl_modify_segment_map
5524 #undef elf_backend_modify_program_headers
5525 #define elf_backend_modify_program_headers nacl_modify_program_headers
5526 #undef elf_backend_final_write_processing
5527 #define elf_backend_final_write_processing nacl_final_write_processing
5529 #include "elf64-target.h"
5531 /* Native Client x32 support. */
5534 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
5536 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5537 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
5541 #undef TARGET_LITTLE_SYM
5542 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
5543 #undef TARGET_LITTLE_NAME
5544 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5546 #define elf32_bed elf32_x86_64_nacl_bed
5548 #define bfd_elf32_bfd_reloc_type_lookup \
5549 elf_x86_64_reloc_type_lookup
5550 #define bfd_elf32_bfd_reloc_name_lookup \
5551 elf_x86_64_reloc_name_lookup
5552 #define bfd_elf32_get_synthetic_symtab \
5553 elf_x86_64_get_synthetic_symtab
5555 #undef elf_backend_object_p
5556 #define elf_backend_object_p \
5557 elf32_x86_64_nacl_elf_object_p
5559 #undef elf_backend_bfd_from_remote_memory
5560 #define elf_backend_bfd_from_remote_memory \
5561 _bfd_elf32_bfd_from_remote_memory
5563 #undef elf_backend_size_info
5564 #define elf_backend_size_info \
5565 _bfd_elf32_size_info
5567 #include "elf32-target.h"
5569 /* Restore defaults. */
5570 #undef elf_backend_object_p
5571 #define elf_backend_object_p elf64_x86_64_elf_object_p
5572 #undef elf_backend_bfd_from_remote_memory
5573 #undef elf_backend_size_info
5574 #undef elf_backend_modify_segment_map
5575 #undef elf_backend_modify_program_headers
5576 #undef elf_backend_final_write_processing
5578 /* Intel L1OM support. */
5581 elf64_l1om_elf_object_p (bfd
*abfd
)
5583 /* Set the right machine number for an L1OM elf64 file. */
5584 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5588 #undef TARGET_LITTLE_SYM
5589 #define TARGET_LITTLE_SYM l1om_elf64_vec
5590 #undef TARGET_LITTLE_NAME
5591 #define TARGET_LITTLE_NAME "elf64-l1om"
5593 #define ELF_ARCH bfd_arch_l1om
5595 #undef ELF_MACHINE_CODE
5596 #define ELF_MACHINE_CODE EM_L1OM
5601 #define elf64_bed elf64_l1om_bed
5603 #undef elf_backend_object_p
5604 #define elf_backend_object_p elf64_l1om_elf_object_p
5606 /* Restore defaults. */
5607 #undef ELF_MAXPAGESIZE
5608 #undef ELF_MINPAGESIZE
5609 #undef ELF_COMMONPAGESIZE
5610 #define ELF_MAXPAGESIZE 0x200000
5611 #define ELF_MINPAGESIZE 0x1000
5612 #define ELF_COMMONPAGESIZE 0x1000
5613 #undef elf_backend_plt_alignment
5614 #define elf_backend_plt_alignment 4
5615 #undef elf_backend_arch_data
5616 #define elf_backend_arch_data &elf_x86_64_arch_bed
5618 #include "elf64-target.h"
5620 /* FreeBSD L1OM support. */
5622 #undef TARGET_LITTLE_SYM
5623 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5624 #undef TARGET_LITTLE_NAME
5625 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5628 #define ELF_OSABI ELFOSABI_FREEBSD
5631 #define elf64_bed elf64_l1om_fbsd_bed
5633 #include "elf64-target.h"
5635 /* Intel K1OM support. */
5638 elf64_k1om_elf_object_p (bfd
*abfd
)
5640 /* Set the right machine number for an K1OM elf64 file. */
5641 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5645 #undef TARGET_LITTLE_SYM
5646 #define TARGET_LITTLE_SYM k1om_elf64_vec
5647 #undef TARGET_LITTLE_NAME
5648 #define TARGET_LITTLE_NAME "elf64-k1om"
5650 #define ELF_ARCH bfd_arch_k1om
5652 #undef ELF_MACHINE_CODE
5653 #define ELF_MACHINE_CODE EM_K1OM
5658 #define elf64_bed elf64_k1om_bed
5660 #undef elf_backend_object_p
5661 #define elf_backend_object_p elf64_k1om_elf_object_p
5663 #undef elf_backend_static_tls_alignment
5665 #undef elf_backend_want_plt_sym
5666 #define elf_backend_want_plt_sym 0
5668 #include "elf64-target.h"
5670 /* FreeBSD K1OM support. */
5672 #undef TARGET_LITTLE_SYM
5673 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
5674 #undef TARGET_LITTLE_NAME
5675 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5678 #define ELF_OSABI ELFOSABI_FREEBSD
5681 #define elf64_bed elf64_k1om_fbsd_bed
5683 #include "elf64-target.h"
5685 /* 32bit x86-64 support. */
5687 #undef TARGET_LITTLE_SYM
5688 #define TARGET_LITTLE_SYM x86_64_elf32_vec
5689 #undef TARGET_LITTLE_NAME
5690 #define TARGET_LITTLE_NAME "elf32-x86-64"
5694 #define ELF_ARCH bfd_arch_i386
5696 #undef ELF_MACHINE_CODE
5697 #define ELF_MACHINE_CODE EM_X86_64
5701 #undef elf_backend_object_p
5702 #define elf_backend_object_p \
5703 elf32_x86_64_elf_object_p
5705 #undef elf_backend_bfd_from_remote_memory
5706 #define elf_backend_bfd_from_remote_memory \
5707 _bfd_elf32_bfd_from_remote_memory
5709 #undef elf_backend_size_info
5710 #define elf_backend_size_info \
5711 _bfd_elf32_size_info
5713 #include "elf32-target.h"