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 X86_PCREL_TYPE_P(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
206 || ((TYPE) == R_X86_64_PC32_BND) \
207 || ((TYPE) == R_X86_64_PC64))
209 /* 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 (NEED_DYNAMIC_RELOCATION_P (info
, h
, sec
, r_type
,
2184 htab
->pointer_r_type
))
2186 struct elf_dyn_relocs
*p
;
2187 struct elf_dyn_relocs
**head
;
2189 /* We must copy these reloc types into the output file.
2190 Create a reloc section in dynobj and make room for
2194 sreloc
= _bfd_elf_make_dynamic_reloc_section
2195 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2196 abfd
, /*rela?*/ TRUE
);
2202 /* If this is a global symbol, we count the number of
2203 relocations we need for this symbol. */
2205 head
= &eh
->dyn_relocs
;
2208 /* Track dynamic relocs needed for local syms too.
2209 We really need local syms available to do this
2214 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2219 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2223 /* Beware of type punned pointers vs strict aliasing
2225 vpp
= &(elf_section_data (s
)->local_dynrel
);
2226 head
= (struct elf_dyn_relocs
**)vpp
;
2230 if (p
== NULL
|| p
->sec
!= sec
)
2232 bfd_size_type amt
= sizeof *p
;
2234 p
= ((struct elf_dyn_relocs
*)
2235 bfd_alloc (htab
->elf
.dynobj
, amt
));
2246 /* Count size relocation as PC-relative relocation. */
2247 if (X86_PCREL_TYPE_P (r_type
) || size_reloc
)
2252 /* This relocation describes the C++ object vtable hierarchy.
2253 Reconstruct it for later use during GC. */
2254 case R_X86_64_GNU_VTINHERIT
:
2255 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2259 /* This relocation describes which C++ vtable entries are actually
2260 used. Record for later use during GC. */
2261 case R_X86_64_GNU_VTENTRY
:
2262 BFD_ASSERT (h
!= NULL
);
2264 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2273 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2275 if (!converted
&& !info
->keep_memory
)
2279 /* Cache the section contents for elf_link_input_bfd if any
2280 load is converted or --no-keep-memory isn't used. */
2281 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2285 /* Cache relocations if any load is converted. */
2286 if (elf_section_data (sec
)->relocs
!= relocs
&& converted
)
2287 elf_section_data (sec
)->relocs
= (Elf_Internal_Rela
*) relocs
;
2292 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2294 sec
->check_relocs_failed
= 1;
2298 /* Return the relocation value for @tpoff relocation
2299 if STT_TLS virtual address is ADDRESS. */
2302 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2304 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2305 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
2306 bfd_vma static_tls_size
;
2308 /* If tls_segment is NULL, we should have signalled an error already. */
2309 if (htab
->tls_sec
== NULL
)
2312 /* Consider special static TLS alignment requirements. */
2313 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
2314 return address
- static_tls_size
- htab
->tls_sec
->vma
;
2317 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
2321 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
2323 /* Opcode Instruction
2326 0x0f 0x8x conditional jump */
2328 && (contents
[offset
- 1] == 0xe8
2329 || contents
[offset
- 1] == 0xe9))
2331 && contents
[offset
- 2] == 0x0f
2332 && (contents
[offset
- 1] & 0xf0) == 0x80));
2335 /* Relocate an x86_64 ELF section. */
2338 elf_x86_64_relocate_section (bfd
*output_bfd
,
2339 struct bfd_link_info
*info
,
2341 asection
*input_section
,
2343 Elf_Internal_Rela
*relocs
,
2344 Elf_Internal_Sym
*local_syms
,
2345 asection
**local_sections
)
2347 struct elf_x86_link_hash_table
*htab
;
2348 Elf_Internal_Shdr
*symtab_hdr
;
2349 struct elf_link_hash_entry
**sym_hashes
;
2350 bfd_vma
*local_got_offsets
;
2351 bfd_vma
*local_tlsdesc_gotents
;
2352 Elf_Internal_Rela
*rel
;
2353 Elf_Internal_Rela
*wrel
;
2354 Elf_Internal_Rela
*relend
;
2355 unsigned int plt_entry_size
;
2357 /* Skip if check_relocs failed. */
2358 if (input_section
->check_relocs_failed
)
2361 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
2365 BFD_ASSERT (is_x86_elf (input_bfd
, htab
));
2367 plt_entry_size
= htab
->plt
.plt_entry_size
;
2368 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2369 sym_hashes
= elf_sym_hashes (input_bfd
);
2370 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2371 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
2373 _bfd_x86_elf_set_tls_module_base (info
);
2375 rel
= wrel
= relocs
;
2376 relend
= relocs
+ input_section
->reloc_count
;
2377 for (; rel
< relend
; wrel
++, rel
++)
2379 unsigned int r_type
, r_type_tls
;
2380 reloc_howto_type
*howto
;
2381 unsigned long r_symndx
;
2382 struct elf_link_hash_entry
*h
;
2383 struct elf_x86_link_hash_entry
*eh
;
2384 Elf_Internal_Sym
*sym
;
2386 bfd_vma off
, offplt
, plt_offset
;
2388 bfd_boolean unresolved_reloc
;
2389 bfd_reloc_status_type r
;
2391 asection
*base_got
, *resolved_plt
;
2393 bfd_boolean resolved_to_zero
;
2394 bfd_boolean relative_reloc
;
2395 bfd_boolean converted_reloc
;
2397 r_type
= ELF32_R_TYPE (rel
->r_info
);
2398 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
2399 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
2406 converted_reloc
= (r_type
& R_X86_64_converted_reloc_bit
) != 0;
2407 r_type
&= ~R_X86_64_converted_reloc_bit
;
2409 if (r_type
>= (int) R_X86_64_standard
)
2410 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
2412 if (r_type
!= (int) R_X86_64_32
2413 || ABI_64_P (output_bfd
))
2414 howto
= x86_64_elf_howto_table
+ r_type
;
2416 howto
= (x86_64_elf_howto_table
2417 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
2418 r_symndx
= htab
->r_sym (rel
->r_info
);
2422 unresolved_reloc
= FALSE
;
2423 if (r_symndx
< symtab_hdr
->sh_info
)
2425 sym
= local_syms
+ r_symndx
;
2426 sec
= local_sections
[r_symndx
];
2428 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
2430 st_size
= sym
->st_size
;
2432 /* Relocate against local STT_GNU_IFUNC symbol. */
2433 if (!bfd_link_relocatable (info
)
2434 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2436 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
,
2441 /* Set STT_GNU_IFUNC symbol value. */
2442 h
->root
.u
.def
.value
= sym
->st_value
;
2443 h
->root
.u
.def
.section
= sec
;
2448 bfd_boolean warned ATTRIBUTE_UNUSED
;
2449 bfd_boolean ignored ATTRIBUTE_UNUSED
;
2451 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2452 r_symndx
, symtab_hdr
, sym_hashes
,
2454 unresolved_reloc
, warned
, ignored
);
2458 if (sec
!= NULL
&& discarded_section (sec
))
2460 _bfd_clear_contents (howto
, input_bfd
, input_section
,
2461 contents
+ rel
->r_offset
);
2462 wrel
->r_offset
= rel
->r_offset
;
2466 /* For ld -r, remove relocations in debug sections against
2467 sections defined in discarded sections. Not done for
2468 eh_frame editing code expects to be present. */
2469 if (bfd_link_relocatable (info
)
2470 && (input_section
->flags
& SEC_DEBUGGING
))
2476 if (bfd_link_relocatable (info
))
2483 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
2485 if (r_type
== R_X86_64_64
)
2487 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
2488 zero-extend it to 64bit if addend is zero. */
2489 r_type
= R_X86_64_32
;
2490 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2492 else if (r_type
== R_X86_64_SIZE64
)
2494 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
2495 zero-extend it to 64bit if addend is zero. */
2496 r_type
= R_X86_64_SIZE32
;
2497 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
2501 eh
= (struct elf_x86_link_hash_entry
*) h
;
2503 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2504 it here if it is defined in a non-shared object. */
2506 && h
->type
== STT_GNU_IFUNC
2512 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2514 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2515 sections because such sections are not SEC_ALLOC and
2516 thus ld.so will not process them. */
2517 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2527 case R_X86_64_GOTPCREL
:
2528 case R_X86_64_GOTPCRELX
:
2529 case R_X86_64_REX_GOTPCRELX
:
2530 case R_X86_64_GOTPCREL64
:
2531 base_got
= htab
->elf
.sgot
;
2532 off
= h
->got
.offset
;
2534 if (base_got
== NULL
)
2537 if (off
== (bfd_vma
) -1)
2539 /* We can't use h->got.offset here to save state, or
2540 even just remember the offset, as finish_dynamic_symbol
2541 would use that as offset into .got. */
2543 if (h
->plt
.offset
== (bfd_vma
) -1)
2546 if (htab
->elf
.splt
!= NULL
)
2548 plt_index
= (h
->plt
.offset
/ plt_entry_size
2549 - htab
->plt
.has_plt0
);
2550 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2551 base_got
= htab
->elf
.sgotplt
;
2555 plt_index
= h
->plt
.offset
/ plt_entry_size
;
2556 off
= plt_index
* GOT_ENTRY_SIZE
;
2557 base_got
= htab
->elf
.igotplt
;
2560 if (h
->dynindx
== -1
2564 /* This references the local defitionion. We must
2565 initialize this entry in the global offset table.
2566 Since the offset must always be a multiple of 8,
2567 we use the least significant bit to record
2568 whether we have initialized it already.
2570 When doing a dynamic link, we create a .rela.got
2571 relocation entry to initialize the value. This
2572 is done in the finish_dynamic_symbol routine. */
2577 bfd_put_64 (output_bfd
, relocation
,
2578 base_got
->contents
+ off
);
2579 /* Note that this is harmless for the GOTPLT64
2580 case, as -1 | 1 still is -1. */
2586 relocation
= (base_got
->output_section
->vma
2587 + base_got
->output_offset
+ off
);
2592 if (h
->plt
.offset
== (bfd_vma
) -1)
2594 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2595 if (r_type
== htab
->pointer_r_type
2596 && (input_section
->flags
& SEC_CODE
) == 0)
2597 goto do_ifunc_pointer
;
2598 goto bad_ifunc_reloc
;
2601 /* STT_GNU_IFUNC symbol must go through PLT. */
2602 if (htab
->elf
.splt
!= NULL
)
2604 if (htab
->plt_second
!= NULL
)
2606 resolved_plt
= htab
->plt_second
;
2607 plt_offset
= eh
->plt_second
.offset
;
2611 resolved_plt
= htab
->elf
.splt
;
2612 plt_offset
= h
->plt
.offset
;
2617 resolved_plt
= htab
->elf
.iplt
;
2618 plt_offset
= h
->plt
.offset
;
2621 relocation
= (resolved_plt
->output_section
->vma
2622 + resolved_plt
->output_offset
+ plt_offset
);
2628 if (h
->root
.root
.string
)
2629 name
= h
->root
.root
.string
;
2631 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2634 /* xgettext:c-format */
2635 (_("%B: relocation %s against STT_GNU_IFUNC "
2636 "symbol `%s' isn't supported"), input_bfd
,
2638 bfd_set_error (bfd_error_bad_value
);
2642 if (bfd_link_pic (info
))
2647 if (ABI_64_P (output_bfd
))
2652 if (rel
->r_addend
!= 0)
2654 if (h
->root
.root
.string
)
2655 name
= h
->root
.root
.string
;
2657 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
2660 /* xgettext:c-format */
2661 (_("%B: relocation %s against STT_GNU_IFUNC "
2662 "symbol `%s' has non-zero addend: %Ld"),
2663 input_bfd
, howto
->name
, name
, rel
->r_addend
);
2664 bfd_set_error (bfd_error_bad_value
);
2668 /* Generate dynamic relcoation only when there is a
2669 non-GOT reference in a shared object or there is no
2671 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2672 || h
->plt
.offset
== (bfd_vma
) -1)
2674 Elf_Internal_Rela outrel
;
2677 /* Need a dynamic relocation to get the real function
2679 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2683 if (outrel
.r_offset
== (bfd_vma
) -1
2684 || outrel
.r_offset
== (bfd_vma
) -2)
2687 outrel
.r_offset
+= (input_section
->output_section
->vma
2688 + input_section
->output_offset
);
2690 if (h
->dynindx
== -1
2692 || bfd_link_executable (info
))
2694 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
2695 h
->root
.root
.string
,
2696 h
->root
.u
.def
.section
->owner
);
2698 /* This symbol is resolved locally. */
2699 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
2700 outrel
.r_addend
= (h
->root
.u
.def
.value
2701 + h
->root
.u
.def
.section
->output_section
->vma
2702 + h
->root
.u
.def
.section
->output_offset
);
2706 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
2707 outrel
.r_addend
= 0;
2710 /* Dynamic relocations are stored in
2711 1. .rela.ifunc section in PIC object.
2712 2. .rela.got section in dynamic executable.
2713 3. .rela.iplt section in static executable. */
2714 if (bfd_link_pic (info
))
2715 sreloc
= htab
->elf
.irelifunc
;
2716 else if (htab
->elf
.splt
!= NULL
)
2717 sreloc
= htab
->elf
.srelgot
;
2719 sreloc
= htab
->elf
.irelplt
;
2720 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2722 /* If this reloc is against an external symbol, we
2723 do not want to fiddle with the addend. Otherwise,
2724 we need to include the symbol value so that it
2725 becomes an addend for the dynamic reloc. For an
2726 internal symbol, we have updated addend. */
2731 case R_X86_64_PC32_BND
:
2733 case R_X86_64_PLT32
:
2734 case R_X86_64_PLT32_BND
:
2739 resolved_to_zero
= (eh
!= NULL
2740 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
2742 /* When generating a shared object, the relocations handled here are
2743 copied into the output file to be resolved at run time. */
2746 case R_X86_64_GOT32
:
2747 case R_X86_64_GOT64
:
2748 /* Relocation is to the entry for this symbol in the global
2750 case R_X86_64_GOTPCREL
:
2751 case R_X86_64_GOTPCRELX
:
2752 case R_X86_64_REX_GOTPCRELX
:
2753 case R_X86_64_GOTPCREL64
:
2754 /* Use global offset table entry as symbol value. */
2755 case R_X86_64_GOTPLT64
:
2756 /* This is obsolete and treated the same as GOT64. */
2757 base_got
= htab
->elf
.sgot
;
2759 if (htab
->elf
.sgot
== NULL
)
2762 relative_reloc
= FALSE
;
2765 off
= h
->got
.offset
;
2767 && h
->plt
.offset
!= (bfd_vma
)-1
2768 && off
== (bfd_vma
)-1)
2770 /* We can't use h->got.offset here to save
2771 state, or even just remember the offset, as
2772 finish_dynamic_symbol would use that as offset into
2774 bfd_vma plt_index
= (h
->plt
.offset
/ plt_entry_size
2775 - htab
->plt
.has_plt0
);
2776 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2777 base_got
= htab
->elf
.sgotplt
;
2780 if (RESOLVED_LOCALLY_P (info
, h
, htab
))
2782 /* We must initialize this entry in the global offset
2783 table. Since the offset must always be a multiple
2784 of 8, we use the least significant bit to record
2785 whether we have initialized it already.
2787 When doing a dynamic link, we create a .rela.got
2788 relocation entry to initialize the value. This is
2789 done in the finish_dynamic_symbol routine. */
2794 bfd_put_64 (output_bfd
, relocation
,
2795 base_got
->contents
+ off
);
2796 /* Note that this is harmless for the GOTPLT64 case,
2797 as -1 | 1 still is -1. */
2800 if (GENERATE_RELATIVE_RELOC_P (info
, h
))
2802 /* If this symbol isn't dynamic in PIC,
2803 generate R_X86_64_RELATIVE here. */
2804 eh
->no_finish_dynamic_symbol
= 1;
2805 relative_reloc
= TRUE
;
2810 unresolved_reloc
= FALSE
;
2814 if (local_got_offsets
== NULL
)
2817 off
= local_got_offsets
[r_symndx
];
2819 /* The offset must always be a multiple of 8. We use
2820 the least significant bit to record whether we have
2821 already generated the necessary reloc. */
2826 bfd_put_64 (output_bfd
, relocation
,
2827 base_got
->contents
+ off
);
2828 local_got_offsets
[r_symndx
] |= 1;
2830 if (bfd_link_pic (info
))
2831 relative_reloc
= TRUE
;
2838 Elf_Internal_Rela outrel
;
2840 /* We need to generate a R_X86_64_RELATIVE reloc
2841 for the dynamic linker. */
2842 s
= htab
->elf
.srelgot
;
2846 outrel
.r_offset
= (base_got
->output_section
->vma
2847 + base_got
->output_offset
2849 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
2850 outrel
.r_addend
= relocation
;
2851 elf_append_rela (output_bfd
, s
, &outrel
);
2854 if (off
>= (bfd_vma
) -2)
2857 relocation
= base_got
->output_section
->vma
2858 + base_got
->output_offset
+ off
;
2859 if (r_type
!= R_X86_64_GOTPCREL
2860 && r_type
!= R_X86_64_GOTPCRELX
2861 && r_type
!= R_X86_64_REX_GOTPCRELX
2862 && r_type
!= R_X86_64_GOTPCREL64
)
2863 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2864 - htab
->elf
.sgotplt
->output_offset
;
2868 case R_X86_64_GOTOFF64
:
2869 /* Relocation is relative to the start of the global offset
2872 /* Check to make sure it isn't a protected function or data
2873 symbol for shared library since it may not be local when
2874 used as function address or with copy relocation. We also
2875 need to make sure that a symbol is referenced locally. */
2876 if (bfd_link_pic (info
) && h
)
2878 if (!h
->def_regular
)
2882 switch (ELF_ST_VISIBILITY (h
->other
))
2885 v
= _("hidden symbol");
2888 v
= _("internal symbol");
2891 v
= _("protected symbol");
2899 /* xgettext:c-format */
2900 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
2901 " `%s' can not be used when making a shared object"),
2902 input_bfd
, v
, h
->root
.root
.string
);
2903 bfd_set_error (bfd_error_bad_value
);
2906 else if (!bfd_link_executable (info
)
2907 && !SYMBOL_REFERENCES_LOCAL_P (info
, h
)
2908 && (h
->type
== STT_FUNC
2909 || h
->type
== STT_OBJECT
)
2910 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2913 /* xgettext:c-format */
2914 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
2915 " `%s' can not be used when making a shared object"),
2917 h
->type
== STT_FUNC
? "function" : "data",
2918 h
->root
.root
.string
);
2919 bfd_set_error (bfd_error_bad_value
);
2924 /* Note that sgot is not involved in this
2925 calculation. We always want the start of .got.plt. If we
2926 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2927 permitted by the ABI, we might have to change this
2929 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2930 + htab
->elf
.sgotplt
->output_offset
;
2933 case R_X86_64_GOTPC32
:
2934 case R_X86_64_GOTPC64
:
2935 /* Use global offset table as symbol value. */
2936 relocation
= htab
->elf
.sgotplt
->output_section
->vma
2937 + htab
->elf
.sgotplt
->output_offset
;
2938 unresolved_reloc
= FALSE
;
2941 case R_X86_64_PLTOFF64
:
2942 /* Relocation is PLT entry relative to GOT. For local
2943 symbols it's the symbol itself relative to GOT. */
2945 /* See PLT32 handling. */
2946 && (h
->plt
.offset
!= (bfd_vma
) -1
2947 || eh
->plt_got
.offset
!= (bfd_vma
) -1)
2948 && htab
->elf
.splt
!= NULL
)
2950 if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
2952 /* Use the GOT PLT. */
2953 resolved_plt
= htab
->plt_got
;
2954 plt_offset
= eh
->plt_got
.offset
;
2956 else if (htab
->plt_second
!= NULL
)
2958 resolved_plt
= htab
->plt_second
;
2959 plt_offset
= eh
->plt_second
.offset
;
2963 resolved_plt
= htab
->elf
.splt
;
2964 plt_offset
= h
->plt
.offset
;
2967 relocation
= (resolved_plt
->output_section
->vma
2968 + resolved_plt
->output_offset
2970 unresolved_reloc
= FALSE
;
2973 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2974 + htab
->elf
.sgotplt
->output_offset
;
2977 case R_X86_64_PLT32
:
2978 case R_X86_64_PLT32_BND
:
2979 /* Relocation is to the entry for this symbol in the
2980 procedure linkage table. */
2982 /* Resolve a PLT32 reloc against a local symbol directly,
2983 without using the procedure linkage table. */
2987 if ((h
->plt
.offset
== (bfd_vma
) -1
2988 && eh
->plt_got
.offset
== (bfd_vma
) -1)
2989 || htab
->elf
.splt
== NULL
)
2991 /* We didn't make a PLT entry for this symbol. This
2992 happens when statically linking PIC code, or when
2993 using -Bsymbolic. */
2997 if (h
->plt
.offset
!= (bfd_vma
) -1)
2999 if (htab
->plt_second
!= NULL
)
3001 resolved_plt
= htab
->plt_second
;
3002 plt_offset
= eh
->plt_second
.offset
;
3006 resolved_plt
= htab
->elf
.splt
;
3007 plt_offset
= h
->plt
.offset
;
3012 /* Use the GOT PLT. */
3013 resolved_plt
= htab
->plt_got
;
3014 plt_offset
= eh
->plt_got
.offset
;
3017 relocation
= (resolved_plt
->output_section
->vma
3018 + resolved_plt
->output_offset
3020 unresolved_reloc
= FALSE
;
3023 case R_X86_64_SIZE32
:
3024 case R_X86_64_SIZE64
:
3025 /* Set to symbol size. */
3026 relocation
= st_size
;
3032 case R_X86_64_PC32_BND
:
3033 /* Don't complain about -fPIC if the symbol is undefined when
3034 building executable unless it is unresolved weak symbol or
3035 -z nocopyreloc is used. */
3036 if ((input_section
->flags
& SEC_ALLOC
) != 0
3037 && (input_section
->flags
& SEC_READONLY
) != 0
3039 && ((bfd_link_executable (info
)
3040 && ((h
->root
.type
== bfd_link_hash_undefweak
3041 && !resolved_to_zero
)
3042 || ((info
->nocopyreloc
3043 || (eh
->def_protected
3044 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
3046 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))))
3047 || bfd_link_dll (info
)))
3049 bfd_boolean fail
= FALSE
;
3051 = ((r_type
== R_X86_64_PC32
3052 || r_type
== R_X86_64_PC32_BND
)
3053 && is_32bit_relative_branch (contents
, rel
->r_offset
));
3055 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3057 /* Symbol is referenced locally. Make sure it is
3058 defined locally or for a branch. */
3059 fail
= (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
))
3062 else if (!(bfd_link_pie (info
)
3063 && (h
->needs_copy
|| eh
->needs_copy
)))
3065 /* Symbol doesn't need copy reloc and isn't referenced
3066 locally. We only allow branch to symbol with
3067 non-default visibility. */
3069 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
3073 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3074 h
, NULL
, NULL
, howto
);
3083 /* FIXME: The ABI says the linker should make sure the value is
3084 the same when it's zeroextended to 64 bit. */
3087 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3090 /* Don't copy a pc-relative relocation into the output file
3091 if the symbol needs copy reloc or the symbol is undefined
3092 when building executable. Copy dynamic function pointer
3093 relocations. Don't generate dynamic relocations against
3094 resolved undefined weak symbols in PIE. */
3095 if ((bfd_link_pic (info
)
3096 && !(bfd_link_pie (info
)
3100 || h
->root
.type
== bfd_link_hash_undefined
)
3101 && (X86_PCREL_TYPE_P (r_type
)
3102 || r_type
== R_X86_64_SIZE32
3103 || r_type
== R_X86_64_SIZE64
))
3105 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3106 && !resolved_to_zero
)
3107 || h
->root
.type
!= bfd_link_hash_undefweak
))
3108 && ((! X86_PCREL_TYPE_P (r_type
)
3109 && r_type
!= R_X86_64_SIZE32
3110 && r_type
!= R_X86_64_SIZE64
)
3111 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
3112 || (ELIMINATE_COPY_RELOCS
3113 && !bfd_link_pic (info
)
3117 || eh
->func_pointer_refcount
> 0
3118 || (h
->root
.type
== bfd_link_hash_undefweak
3119 && !resolved_to_zero
))
3120 && ((h
->def_dynamic
&& !h
->def_regular
)
3121 /* Undefined weak symbol is bound locally when
3123 || h
->root
.type
== bfd_link_hash_undefined
)))
3125 Elf_Internal_Rela outrel
;
3126 bfd_boolean skip
, relocate
;
3129 /* When generating a shared object, these relocations
3130 are copied into the output file to be resolved at run
3136 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3138 if (outrel
.r_offset
== (bfd_vma
) -1)
3140 else if (outrel
.r_offset
== (bfd_vma
) -2)
3141 skip
= TRUE
, relocate
= TRUE
;
3143 outrel
.r_offset
+= (input_section
->output_section
->vma
3144 + input_section
->output_offset
);
3147 memset (&outrel
, 0, sizeof outrel
);
3149 /* h->dynindx may be -1 if this symbol was marked to
3153 && (X86_PCREL_TYPE_P (r_type
)
3154 || !(bfd_link_executable (info
)
3155 || SYMBOLIC_BIND (info
, h
))
3156 || ! h
->def_regular
))
3158 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3159 outrel
.r_addend
= rel
->r_addend
;
3163 /* This symbol is local, or marked to become local.
3164 When relocation overflow check is disabled, we
3165 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
3166 if (r_type
== htab
->pointer_r_type
3167 || (r_type
== R_X86_64_32
3168 && info
->no_reloc_overflow_check
))
3171 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3172 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3174 else if (r_type
== R_X86_64_64
3175 && !ABI_64_P (output_bfd
))
3178 outrel
.r_info
= htab
->r_info (0,
3179 R_X86_64_RELATIVE64
);
3180 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3181 /* Check addend overflow. */
3182 if ((outrel
.r_addend
& 0x80000000)
3183 != (rel
->r_addend
& 0x80000000))
3186 int addend
= rel
->r_addend
;
3187 if (h
&& h
->root
.root
.string
)
3188 name
= h
->root
.root
.string
;
3190 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3193 /* xgettext:c-format */
3194 (_("%B: addend %s%#x in relocation %s against "
3195 "symbol `%s' at %#Lx in section `%A' is "
3197 input_bfd
, addend
< 0 ? "-" : "", addend
,
3198 howto
->name
, name
, rel
->r_offset
, input_section
);
3199 bfd_set_error (bfd_error_bad_value
);
3207 if (bfd_is_abs_section (sec
))
3209 else if (sec
== NULL
|| sec
->owner
== NULL
)
3211 bfd_set_error (bfd_error_bad_value
);
3218 /* We are turning this relocation into one
3219 against a section symbol. It would be
3220 proper to subtract the symbol's value,
3221 osec->vma, from the emitted reloc addend,
3222 but ld.so expects buggy relocs. */
3223 osec
= sec
->output_section
;
3224 sindx
= elf_section_data (osec
)->dynindx
;
3227 asection
*oi
= htab
->elf
.text_index_section
;
3228 sindx
= elf_section_data (oi
)->dynindx
;
3230 BFD_ASSERT (sindx
!= 0);
3233 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3234 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3238 sreloc
= elf_section_data (input_section
)->sreloc
;
3240 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3242 r
= bfd_reloc_notsupported
;
3243 goto check_relocation_error
;
3246 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3248 /* If this reloc is against an external symbol, we do
3249 not want to fiddle with the addend. Otherwise, we
3250 need to include the symbol value so that it becomes
3251 an addend for the dynamic reloc. */
3258 case R_X86_64_TLSGD
:
3259 case R_X86_64_GOTPC32_TLSDESC
:
3260 case R_X86_64_TLSDESC_CALL
:
3261 case R_X86_64_GOTTPOFF
:
3262 tls_type
= GOT_UNKNOWN
;
3263 if (h
== NULL
&& local_got_offsets
)
3264 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
3266 tls_type
= elf_x86_hash_entry (h
)->tls_type
;
3268 r_type_tls
= r_type
;
3269 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3270 input_section
, contents
,
3271 symtab_hdr
, sym_hashes
,
3272 &r_type_tls
, tls_type
, rel
,
3273 relend
, h
, r_symndx
, TRUE
))
3276 if (r_type_tls
== R_X86_64_TPOFF32
)
3278 bfd_vma roff
= rel
->r_offset
;
3280 BFD_ASSERT (! unresolved_reloc
);
3282 if (r_type
== R_X86_64_TLSGD
)
3284 /* GD->LE transition. For 64bit, change
3285 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3286 .word 0x6666; rex64; call __tls_get_addr@PLT
3288 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3290 call *__tls_get_addr@GOTPCREL(%rip)
3291 which may be converted to
3292 addr32 call __tls_get_addr
3295 leaq foo@tpoff(%rax), %rax
3297 leaq foo@tlsgd(%rip), %rdi
3298 .word 0x6666; rex64; call __tls_get_addr@PLT
3300 leaq foo@tlsgd(%rip), %rdi
3302 call *__tls_get_addr@GOTPCREL(%rip)
3303 which may be converted to
3304 addr32 call __tls_get_addr
3307 leaq foo@tpoff(%rax), %rax
3308 For largepic, change:
3309 leaq foo@tlsgd(%rip), %rdi
3310 movabsq $__tls_get_addr@pltoff, %rax
3315 leaq foo@tpoff(%rax), %rax
3316 nopw 0x0(%rax,%rax,1) */
3318 if (ABI_64_P (output_bfd
))
3320 if (contents
[roff
+ 5] == 0xb8)
3322 memcpy (contents
+ roff
- 3,
3323 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
3324 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3328 memcpy (contents
+ roff
- 4,
3329 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3333 memcpy (contents
+ roff
- 3,
3334 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3336 bfd_put_32 (output_bfd
,
3337 elf_x86_64_tpoff (info
, relocation
),
3338 contents
+ roff
+ 8 + largepic
);
3339 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
3340 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
3345 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3347 /* GDesc -> LE transition.
3348 It's originally something like:
3349 leaq x@tlsdesc(%rip), %rax
3352 movl $x@tpoff, %rax. */
3354 unsigned int val
, type
;
3356 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3357 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3358 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
3359 contents
+ roff
- 3);
3360 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
3361 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3362 contents
+ roff
- 1);
3363 bfd_put_32 (output_bfd
,
3364 elf_x86_64_tpoff (info
, relocation
),
3368 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3370 /* GDesc -> LE transition.
3375 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3376 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3379 else if (r_type
== R_X86_64_GOTTPOFF
)
3381 /* IE->LE transition:
3382 For 64bit, originally it can be one of:
3383 movq foo@gottpoff(%rip), %reg
3384 addq foo@gottpoff(%rip), %reg
3387 leaq foo(%reg), %reg
3389 For 32bit, originally it can be one of:
3390 movq foo@gottpoff(%rip), %reg
3391 addl foo@gottpoff(%rip), %reg
3394 leal foo(%reg), %reg
3397 unsigned int val
, type
, reg
;
3400 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
3403 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3404 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3410 bfd_put_8 (output_bfd
, 0x49,
3411 contents
+ roff
- 3);
3412 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3413 bfd_put_8 (output_bfd
, 0x41,
3414 contents
+ roff
- 3);
3415 bfd_put_8 (output_bfd
, 0xc7,
3416 contents
+ roff
- 2);
3417 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3418 contents
+ roff
- 1);
3422 /* addq/addl -> addq/addl - addressing with %rsp/%r12
3425 bfd_put_8 (output_bfd
, 0x49,
3426 contents
+ roff
- 3);
3427 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3428 bfd_put_8 (output_bfd
, 0x41,
3429 contents
+ roff
- 3);
3430 bfd_put_8 (output_bfd
, 0x81,
3431 contents
+ roff
- 2);
3432 bfd_put_8 (output_bfd
, 0xc0 | reg
,
3433 contents
+ roff
- 1);
3437 /* addq/addl -> leaq/leal */
3439 bfd_put_8 (output_bfd
, 0x4d,
3440 contents
+ roff
- 3);
3441 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
3442 bfd_put_8 (output_bfd
, 0x45,
3443 contents
+ roff
- 3);
3444 bfd_put_8 (output_bfd
, 0x8d,
3445 contents
+ roff
- 2);
3446 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
3447 contents
+ roff
- 1);
3449 bfd_put_32 (output_bfd
,
3450 elf_x86_64_tpoff (info
, relocation
),
3458 if (htab
->elf
.sgot
== NULL
)
3463 off
= h
->got
.offset
;
3464 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
3468 if (local_got_offsets
== NULL
)
3471 off
= local_got_offsets
[r_symndx
];
3472 offplt
= local_tlsdesc_gotents
[r_symndx
];
3479 Elf_Internal_Rela outrel
;
3483 if (htab
->elf
.srelgot
== NULL
)
3486 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3488 if (GOT_TLS_GDESC_P (tls_type
))
3490 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
3491 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
3492 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
3493 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3494 + htab
->elf
.sgotplt
->output_offset
3496 + htab
->sgotplt_jump_table_size
);
3497 sreloc
= htab
->elf
.srelplt
;
3499 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3501 outrel
.r_addend
= 0;
3502 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3505 sreloc
= htab
->elf
.srelgot
;
3507 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3508 + htab
->elf
.sgot
->output_offset
+ off
);
3510 if (GOT_TLS_GD_P (tls_type
))
3511 dr_type
= R_X86_64_DTPMOD64
;
3512 else if (GOT_TLS_GDESC_P (tls_type
))
3515 dr_type
= R_X86_64_TPOFF64
;
3517 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
3518 outrel
.r_addend
= 0;
3519 if ((dr_type
== R_X86_64_TPOFF64
3520 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
3521 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
3522 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
3524 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3526 if (GOT_TLS_GD_P (tls_type
))
3530 BFD_ASSERT (! unresolved_reloc
);
3531 bfd_put_64 (output_bfd
,
3532 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3533 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3537 bfd_put_64 (output_bfd
, 0,
3538 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3539 outrel
.r_info
= htab
->r_info (indx
,
3541 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
3542 elf_append_rela (output_bfd
, sreloc
,
3551 local_got_offsets
[r_symndx
] |= 1;
3554 if (off
>= (bfd_vma
) -2
3555 && ! GOT_TLS_GDESC_P (tls_type
))
3557 if (r_type_tls
== r_type
)
3559 if (r_type
== R_X86_64_GOTPC32_TLSDESC
3560 || r_type
== R_X86_64_TLSDESC_CALL
)
3561 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3562 + htab
->elf
.sgotplt
->output_offset
3563 + offplt
+ htab
->sgotplt_jump_table_size
;
3565 relocation
= htab
->elf
.sgot
->output_section
->vma
3566 + htab
->elf
.sgot
->output_offset
+ off
;
3567 unresolved_reloc
= FALSE
;
3571 bfd_vma roff
= rel
->r_offset
;
3573 if (r_type
== R_X86_64_TLSGD
)
3575 /* GD->IE transition. For 64bit, change
3576 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3577 .word 0x6666; rex64; call __tls_get_addr@PLT
3579 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3581 call *__tls_get_addr@GOTPCREL(%rip
3582 which may be converted to
3583 addr32 call __tls_get_addr
3586 addq foo@gottpoff(%rip), %rax
3588 leaq foo@tlsgd(%rip), %rdi
3589 .word 0x6666; rex64; call __tls_get_addr@PLT
3591 leaq foo@tlsgd(%rip), %rdi
3593 call *__tls_get_addr@GOTPCREL(%rip)
3594 which may be converted to
3595 addr32 call __tls_get_addr
3598 addq foo@gottpoff(%rip), %rax
3599 For largepic, change:
3600 leaq foo@tlsgd(%rip), %rdi
3601 movabsq $__tls_get_addr@pltoff, %rax
3606 addq foo@gottpoff(%rax), %rax
3607 nopw 0x0(%rax,%rax,1) */
3609 if (ABI_64_P (output_bfd
))
3611 if (contents
[roff
+ 5] == 0xb8)
3613 memcpy (contents
+ roff
- 3,
3614 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
3615 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3619 memcpy (contents
+ roff
- 4,
3620 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3624 memcpy (contents
+ roff
- 3,
3625 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3628 relocation
= (htab
->elf
.sgot
->output_section
->vma
3629 + htab
->elf
.sgot
->output_offset
+ off
3632 - input_section
->output_section
->vma
3633 - input_section
->output_offset
3635 bfd_put_32 (output_bfd
, relocation
,
3636 contents
+ roff
+ 8 + largepic
);
3637 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
3642 else if (r_type
== R_X86_64_GOTPC32_TLSDESC
)
3644 /* GDesc -> IE transition.
3645 It's originally something like:
3646 leaq x@tlsdesc(%rip), %rax
3649 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
3651 /* Now modify the instruction as appropriate. To
3652 turn a leaq into a movq in the form we use it, it
3653 suffices to change the second byte from 0x8d to
3655 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3657 bfd_put_32 (output_bfd
,
3658 htab
->elf
.sgot
->output_section
->vma
3659 + htab
->elf
.sgot
->output_offset
+ off
3661 - input_section
->output_section
->vma
3662 - input_section
->output_offset
3667 else if (r_type
== R_X86_64_TLSDESC_CALL
)
3669 /* GDesc -> IE transition.
3676 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3677 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3685 case R_X86_64_TLSLD
:
3686 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3687 input_section
, contents
,
3688 symtab_hdr
, sym_hashes
,
3689 &r_type
, GOT_UNKNOWN
, rel
,
3690 relend
, h
, r_symndx
, TRUE
))
3693 if (r_type
!= R_X86_64_TLSLD
)
3695 /* LD->LE transition:
3696 leaq foo@tlsld(%rip), %rdi
3697 call __tls_get_addr@PLT
3698 For 64bit, we change it into:
3699 .word 0x6666; .byte 0x66; movq %fs:0, %rax
3700 For 32bit, we change it into:
3701 nopl 0x0(%rax); movl %fs:0, %eax
3703 leaq foo@tlsld(%rip), %rdi;
3704 call *__tls_get_addr@GOTPCREL(%rip)
3705 which may be converted to
3706 addr32 call __tls_get_addr
3707 For 64bit, we change it into:
3708 .word 0x6666; .word 0x6666; movq %fs:0, %rax
3709 For 32bit, we change it into:
3710 nopw 0x0(%rax); movl %fs:0, %eax
3711 For largepic, change:
3712 leaq foo@tlsgd(%rip), %rdi
3713 movabsq $__tls_get_addr@pltoff, %rax
3717 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
3720 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
3721 if (ABI_64_P (output_bfd
))
3723 if (contents
[rel
->r_offset
+ 5] == 0xb8)
3724 memcpy (contents
+ rel
->r_offset
- 3,
3725 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
3726 "\x64\x48\x8b\x04\x25\0\0\0", 22);
3727 else if (contents
[rel
->r_offset
+ 4] == 0xff
3728 || contents
[rel
->r_offset
+ 4] == 0x67)
3729 memcpy (contents
+ rel
->r_offset
- 3,
3730 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
3733 memcpy (contents
+ rel
->r_offset
- 3,
3734 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3738 if (contents
[rel
->r_offset
+ 4] == 0xff)
3739 memcpy (contents
+ rel
->r_offset
- 3,
3740 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
3743 memcpy (contents
+ rel
->r_offset
- 3,
3744 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
3746 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
3747 and R_X86_64_PLTOFF64. */
3753 if (htab
->elf
.sgot
== NULL
)
3756 off
= htab
->tls_ld_or_ldm_got
.offset
;
3761 Elf_Internal_Rela outrel
;
3763 if (htab
->elf
.srelgot
== NULL
)
3766 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3767 + htab
->elf
.sgot
->output_offset
+ off
);
3769 bfd_put_64 (output_bfd
, 0,
3770 htab
->elf
.sgot
->contents
+ off
);
3771 bfd_put_64 (output_bfd
, 0,
3772 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3773 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
3774 outrel
.r_addend
= 0;
3775 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
3777 htab
->tls_ld_or_ldm_got
.offset
|= 1;
3779 relocation
= htab
->elf
.sgot
->output_section
->vma
3780 + htab
->elf
.sgot
->output_offset
+ off
;
3781 unresolved_reloc
= FALSE
;
3784 case R_X86_64_DTPOFF32
:
3785 if (!bfd_link_executable (info
)
3786 || (input_section
->flags
& SEC_CODE
) == 0)
3787 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3789 relocation
= elf_x86_64_tpoff (info
, relocation
);
3792 case R_X86_64_TPOFF32
:
3793 case R_X86_64_TPOFF64
:
3794 BFD_ASSERT (bfd_link_executable (info
));
3795 relocation
= elf_x86_64_tpoff (info
, relocation
);
3798 case R_X86_64_DTPOFF64
:
3799 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
3800 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3807 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3808 because such sections are not SEC_ALLOC and thus ld.so will
3809 not process them. */
3810 if (unresolved_reloc
3811 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3813 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3814 rel
->r_offset
) != (bfd_vma
) -1)
3819 sec
= h
->root
.u
.def
.section
;
3820 if ((info
->nocopyreloc
3821 || (eh
->def_protected
3822 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
3823 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))
3824 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
3825 h
, NULL
, NULL
, howto
);
3830 /* xgettext:c-format */
3831 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3836 h
->root
.root
.string
);
3842 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3843 contents
, rel
->r_offset
,
3844 relocation
, rel
->r_addend
);
3846 check_relocation_error
:
3847 if (r
!= bfd_reloc_ok
)
3852 name
= h
->root
.root
.string
;
3855 name
= bfd_elf_string_from_elf_section (input_bfd
,
3856 symtab_hdr
->sh_link
,
3861 name
= bfd_section_name (input_bfd
, sec
);
3864 if (r
== bfd_reloc_overflow
)
3866 if (converted_reloc
)
3868 info
->callbacks
->einfo
3869 (_("%F%P: failed to convert GOTPCREL relocation; relink with --no-relax\n"));
3872 (*info
->callbacks
->reloc_overflow
)
3873 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3874 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3879 /* xgettext:c-format */
3880 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3881 input_bfd
, input_section
,
3882 rel
->r_offset
, name
, (int) r
);
3893 Elf_Internal_Shdr
*rel_hdr
;
3894 size_t deleted
= rel
- wrel
;
3896 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
3897 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3898 if (rel_hdr
->sh_size
== 0)
3900 /* It is too late to remove an empty reloc section. Leave
3902 ??? What is wrong with an empty section??? */
3903 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
3906 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
3907 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3908 input_section
->reloc_count
-= deleted
;
3914 /* Finish up dynamic symbol handling. We set the contents of various
3915 dynamic sections here. */
3918 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
3919 struct bfd_link_info
*info
,
3920 struct elf_link_hash_entry
*h
,
3921 Elf_Internal_Sym
*sym
)
3923 struct elf_x86_link_hash_table
*htab
;
3924 bfd_boolean use_plt_second
;
3925 struct elf_x86_link_hash_entry
*eh
;
3926 bfd_boolean local_undefweak
;
3928 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
3932 /* Use the second PLT section only if there is .plt section. */
3933 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
3935 eh
= (struct elf_x86_link_hash_entry
*) h
;
3936 if (eh
->no_finish_dynamic_symbol
)
3939 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3940 resolved undefined weak symbols in executable so that their
3941 references have value 0 at run-time. */
3942 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
3944 if (h
->plt
.offset
!= (bfd_vma
) -1)
3947 bfd_vma got_offset
, plt_offset
;
3948 Elf_Internal_Rela rela
;
3950 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
3951 const struct elf_backend_data
*bed
;
3952 bfd_vma plt_got_pcrel_offset
;
3954 /* When building a static executable, use .iplt, .igot.plt and
3955 .rela.iplt sections for STT_GNU_IFUNC symbols. */
3956 if (htab
->elf
.splt
!= NULL
)
3958 plt
= htab
->elf
.splt
;
3959 gotplt
= htab
->elf
.sgotplt
;
3960 relplt
= htab
->elf
.srelplt
;
3964 plt
= htab
->elf
.iplt
;
3965 gotplt
= htab
->elf
.igotplt
;
3966 relplt
= htab
->elf
.irelplt
;
3969 /* This symbol has an entry in the procedure linkage table. Set
3971 if ((h
->dynindx
== -1
3973 && !((h
->forced_local
|| bfd_link_executable (info
))
3975 && h
->type
== STT_GNU_IFUNC
))
3981 /* Get the index in the procedure linkage table which
3982 corresponds to this symbol. This is the index of this symbol
3983 in all the symbols for which we are making plt entries. The
3984 first entry in the procedure linkage table is reserved.
3986 Get the offset into the .got table of the entry that
3987 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
3988 bytes. The first three are reserved for the dynamic linker.
3990 For static executables, we don't reserve anything. */
3992 if (plt
== htab
->elf
.splt
)
3994 got_offset
= (h
->plt
.offset
/ htab
->plt
.plt_entry_size
3995 - htab
->plt
.has_plt0
);
3996 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4000 got_offset
= h
->plt
.offset
/ htab
->plt
.plt_entry_size
;
4001 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4004 /* Fill in the entry in the procedure linkage table. */
4005 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
4006 htab
->plt
.plt_entry_size
);
4009 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
4010 htab
->non_lazy_plt
->plt_entry
,
4011 htab
->non_lazy_plt
->plt_entry_size
);
4013 resolved_plt
= htab
->plt_second
;
4014 plt_offset
= eh
->plt_second
.offset
;
4019 plt_offset
= h
->plt
.offset
;
4022 /* Insert the relocation positions of the plt section. */
4024 /* Put offset the PC-relative instruction referring to the GOT entry,
4025 subtracting the size of that instruction. */
4026 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
4027 + gotplt
->output_offset
4029 - resolved_plt
->output_section
->vma
4030 - resolved_plt
->output_offset
4032 - htab
->plt
.plt_got_insn_size
);
4034 /* Check PC-relative offset overflow in PLT entry. */
4035 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
4036 /* xgettext:c-format */
4037 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
4038 output_bfd
, h
->root
.root
.string
);
4040 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
4041 (resolved_plt
->contents
+ plt_offset
4042 + htab
->plt
.plt_got_offset
));
4044 /* Fill in the entry in the global offset table, initially this
4045 points to the second part of the PLT entry. Leave the entry
4046 as zero for undefined weak symbol in PIE. No PLT relocation
4047 against undefined weak symbol in PIE. */
4048 if (!local_undefweak
)
4050 if (htab
->plt
.has_plt0
)
4051 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4052 + plt
->output_offset
4054 + htab
->lazy_plt
->plt_lazy_offset
),
4055 gotplt
->contents
+ got_offset
);
4057 /* Fill in the entry in the .rela.plt section. */
4058 rela
.r_offset
= (gotplt
->output_section
->vma
4059 + gotplt
->output_offset
4061 if (h
->dynindx
== -1
4062 || ((bfd_link_executable (info
)
4063 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4065 && h
->type
== STT_GNU_IFUNC
))
4067 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
4068 h
->root
.root
.string
,
4069 h
->root
.u
.def
.section
->owner
);
4071 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4072 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4073 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4074 rela
.r_addend
= (h
->root
.u
.def
.value
4075 + h
->root
.u
.def
.section
->output_section
->vma
4076 + h
->root
.u
.def
.section
->output_offset
);
4077 /* R_X86_64_IRELATIVE comes last. */
4078 plt_index
= htab
->next_irelative_index
--;
4082 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4084 plt_index
= htab
->next_jump_slot_index
++;
4087 /* Don't fill the second and third slots in PLT entry for
4088 static executables nor without PLT0. */
4089 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
4092 = h
->plt
.offset
+ htab
->lazy_plt
->plt_plt_insn_end
;
4094 /* Put relocation index. */
4095 bfd_put_32 (output_bfd
, plt_index
,
4096 (plt
->contents
+ h
->plt
.offset
4097 + htab
->lazy_plt
->plt_reloc_offset
));
4099 /* Put offset for jmp .PLT0 and check for overflow. We don't
4100 check relocation index for overflow since branch displacement
4101 will overflow first. */
4102 if (plt0_offset
> 0x80000000)
4103 /* xgettext:c-format */
4104 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
4105 output_bfd
, h
->root
.root
.string
);
4106 bfd_put_32 (output_bfd
, - plt0_offset
,
4107 (plt
->contents
+ h
->plt
.offset
4108 + htab
->lazy_plt
->plt_plt_offset
));
4111 bed
= get_elf_backend_data (output_bfd
);
4112 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4113 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4116 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4118 bfd_vma got_offset
, plt_offset
;
4119 asection
*plt
, *got
;
4120 bfd_boolean got_after_plt
;
4121 int32_t got_pcrel_offset
;
4123 /* Set the entry in the GOT procedure linkage table. */
4124 plt
= htab
->plt_got
;
4125 got
= htab
->elf
.sgot
;
4126 got_offset
= h
->got
.offset
;
4128 if (got_offset
== (bfd_vma
) -1
4129 || (h
->type
== STT_GNU_IFUNC
&& h
->def_regular
)
4134 /* Use the non-lazy PLT entry template for the GOT PLT since they
4135 are the identical. */
4136 /* Fill in the entry in the GOT procedure linkage table. */
4137 plt_offset
= eh
->plt_got
.offset
;
4138 memcpy (plt
->contents
+ plt_offset
,
4139 htab
->non_lazy_plt
->plt_entry
,
4140 htab
->non_lazy_plt
->plt_entry_size
);
4142 /* Put offset the PC-relative instruction referring to the GOT
4143 entry, subtracting the size of that instruction. */
4144 got_pcrel_offset
= (got
->output_section
->vma
4145 + got
->output_offset
4147 - plt
->output_section
->vma
4148 - plt
->output_offset
4150 - htab
->non_lazy_plt
->plt_got_insn_size
);
4152 /* Check PC-relative offset overflow in GOT PLT entry. */
4153 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
4154 if ((got_after_plt
&& got_pcrel_offset
< 0)
4155 || (!got_after_plt
&& got_pcrel_offset
> 0))
4156 /* xgettext:c-format */
4157 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
4158 output_bfd
, h
->root
.root
.string
);
4160 bfd_put_32 (output_bfd
, got_pcrel_offset
,
4161 (plt
->contents
+ plt_offset
4162 + htab
->non_lazy_plt
->plt_got_offset
));
4165 if (!local_undefweak
4167 && (h
->plt
.offset
!= (bfd_vma
) -1
4168 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4170 /* Mark the symbol as undefined, rather than as defined in
4171 the .plt section. Leave the value if there were any
4172 relocations where pointer equality matters (this is a clue
4173 for the dynamic linker, to make function pointer
4174 comparisons work between an application and shared
4175 library), otherwise set it to zero. If a function is only
4176 called from a binary, there is no need to slow down
4177 shared libraries because of that. */
4178 sym
->st_shndx
= SHN_UNDEF
;
4179 if (!h
->pointer_equality_needed
)
4183 /* Don't generate dynamic GOT relocation against undefined weak
4184 symbol in executable. */
4185 if (h
->got
.offset
!= (bfd_vma
) -1
4186 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h
)->tls_type
)
4187 && elf_x86_hash_entry (h
)->tls_type
!= GOT_TLS_IE
4188 && !local_undefweak
)
4190 Elf_Internal_Rela rela
;
4191 asection
*relgot
= htab
->elf
.srelgot
;
4193 /* This symbol has an entry in the global offset table. Set it
4195 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4198 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4199 + htab
->elf
.sgot
->output_offset
4200 + (h
->got
.offset
&~ (bfd_vma
) 1));
4202 /* If this is a static link, or it is a -Bsymbolic link and the
4203 symbol is defined locally or was forced to be local because
4204 of a version file, we just want to emit a RELATIVE reloc.
4205 The entry in the global offset table will already have been
4206 initialized in the relocate_section function. */
4208 && h
->type
== STT_GNU_IFUNC
)
4210 if (h
->plt
.offset
== (bfd_vma
) -1)
4212 /* STT_GNU_IFUNC is referenced without PLT. */
4213 if (htab
->elf
.splt
== NULL
)
4215 /* use .rel[a].iplt section to store .got relocations
4216 in static executable. */
4217 relgot
= htab
->elf
.irelplt
;
4219 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4221 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
4222 h
->root
.root
.string
,
4223 h
->root
.u
.def
.section
->owner
);
4225 rela
.r_info
= htab
->r_info (0,
4226 R_X86_64_IRELATIVE
);
4227 rela
.r_addend
= (h
->root
.u
.def
.value
4228 + h
->root
.u
.def
.section
->output_section
->vma
4229 + h
->root
.u
.def
.section
->output_offset
);
4234 else if (bfd_link_pic (info
))
4236 /* Generate R_X86_64_GLOB_DAT. */
4244 if (!h
->pointer_equality_needed
)
4247 /* For non-shared object, we can't use .got.plt, which
4248 contains the real function addres if we need pointer
4249 equality. We load the GOT entry with the PLT entry. */
4250 if (htab
->plt_second
!= NULL
)
4252 plt
= htab
->plt_second
;
4253 plt_offset
= eh
->plt_second
.offset
;
4257 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4258 plt_offset
= h
->plt
.offset
;
4260 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4261 + plt
->output_offset
4263 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4267 else if (bfd_link_pic (info
)
4268 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
4270 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
4272 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4273 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4274 rela
.r_addend
= (h
->root
.u
.def
.value
4275 + h
->root
.u
.def
.section
->output_section
->vma
4276 + h
->root
.u
.def
.section
->output_offset
);
4280 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4282 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4283 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4284 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4288 elf_append_rela (output_bfd
, relgot
, &rela
);
4293 Elf_Internal_Rela rela
;
4296 /* This symbol needs a copy reloc. Set it up. */
4298 if (h
->dynindx
== -1
4299 || (h
->root
.type
!= bfd_link_hash_defined
4300 && h
->root
.type
!= bfd_link_hash_defweak
)
4301 || htab
->elf
.srelbss
== NULL
4302 || htab
->elf
.sreldynrelro
== NULL
)
4305 rela
.r_offset
= (h
->root
.u
.def
.value
4306 + h
->root
.u
.def
.section
->output_section
->vma
4307 + h
->root
.u
.def
.section
->output_offset
);
4308 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4310 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
4311 s
= htab
->elf
.sreldynrelro
;
4313 s
= htab
->elf
.srelbss
;
4314 elf_append_rela (output_bfd
, s
, &rela
);
4320 /* Finish up local dynamic symbol handling. We set the contents of
4321 various dynamic sections here. */
4324 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4326 struct elf_link_hash_entry
*h
4327 = (struct elf_link_hash_entry
*) *slot
;
4328 struct bfd_link_info
*info
4329 = (struct bfd_link_info
*) inf
;
4331 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4335 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4336 here since undefined weak symbol may not be dynamic and may not be
4337 called for elf_x86_64_finish_dynamic_symbol. */
4340 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
4343 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
4344 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
4346 if (h
->root
.type
!= bfd_link_hash_undefweak
4347 || h
->dynindx
!= -1)
4350 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4354 /* Used to decide how to sort relocs in an optimal manner for the
4355 dynamic linker, before writing them out. */
4357 static enum elf_reloc_type_class
4358 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info
,
4359 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4360 const Elf_Internal_Rela
*rela
)
4362 bfd
*abfd
= info
->output_bfd
;
4363 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4364 struct elf_x86_link_hash_table
*htab
4365 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4367 if (htab
->elf
.dynsym
!= NULL
4368 && htab
->elf
.dynsym
->contents
!= NULL
)
4370 /* Check relocation against STT_GNU_IFUNC symbol if there are
4372 unsigned long r_symndx
= htab
->r_sym (rela
->r_info
);
4373 if (r_symndx
!= STN_UNDEF
)
4375 Elf_Internal_Sym sym
;
4376 if (!bed
->s
->swap_symbol_in (abfd
,
4377 (htab
->elf
.dynsym
->contents
4378 + r_symndx
* bed
->s
->sizeof_sym
),
4382 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
4383 return reloc_class_ifunc
;
4387 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4389 case R_X86_64_IRELATIVE
:
4390 return reloc_class_ifunc
;
4391 case R_X86_64_RELATIVE
:
4392 case R_X86_64_RELATIVE64
:
4393 return reloc_class_relative
;
4394 case R_X86_64_JUMP_SLOT
:
4395 return reloc_class_plt
;
4397 return reloc_class_copy
;
4399 return reloc_class_normal
;
4403 /* Finish up the dynamic sections. */
4406 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4407 struct bfd_link_info
*info
)
4409 struct elf_x86_link_hash_table
*htab
;
4413 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4417 dynobj
= htab
->elf
.dynobj
;
4418 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4420 if (htab
->elf
.dynamic_sections_created
)
4422 bfd_byte
*dyncon
, *dynconend
;
4423 const struct elf_backend_data
*bed
;
4424 bfd_size_type sizeof_dyn
;
4426 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4429 bed
= get_elf_backend_data (dynobj
);
4430 sizeof_dyn
= bed
->s
->sizeof_dyn
;
4431 dyncon
= sdyn
->contents
;
4432 dynconend
= sdyn
->contents
+ sdyn
->size
;
4433 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
4435 Elf_Internal_Dyn dyn
;
4438 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
4446 s
= htab
->elf
.sgotplt
;
4447 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4451 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
4455 s
= htab
->elf
.srelplt
->output_section
;
4456 dyn
.d_un
.d_val
= s
->size
;
4459 case DT_TLSDESC_PLT
:
4461 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4462 + htab
->tlsdesc_plt
;
4465 case DT_TLSDESC_GOT
:
4467 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4468 + htab
->tlsdesc_got
;
4472 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
4475 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4477 elf_section_data (htab
->elf
.splt
->output_section
)
4478 ->this_hdr
.sh_entsize
= htab
->plt
.plt_entry_size
;
4480 if (htab
->plt
.has_plt0
)
4482 /* Fill in the special first entry in the procedure linkage
4484 memcpy (htab
->elf
.splt
->contents
,
4485 htab
->lazy_plt
->plt0_entry
,
4486 htab
->lazy_plt
->plt0_entry_size
);
4487 /* Add offset for pushq GOT+8(%rip), since the instruction
4488 uses 6 bytes subtract this value. */
4489 bfd_put_32 (output_bfd
,
4490 (htab
->elf
.sgotplt
->output_section
->vma
4491 + htab
->elf
.sgotplt
->output_offset
4493 - htab
->elf
.splt
->output_section
->vma
4494 - htab
->elf
.splt
->output_offset
4496 (htab
->elf
.splt
->contents
4497 + htab
->lazy_plt
->plt0_got1_offset
));
4498 /* Add offset for the PC-relative instruction accessing
4499 GOT+16, subtracting the offset to the end of that
4501 bfd_put_32 (output_bfd
,
4502 (htab
->elf
.sgotplt
->output_section
->vma
4503 + htab
->elf
.sgotplt
->output_offset
4505 - htab
->elf
.splt
->output_section
->vma
4506 - htab
->elf
.splt
->output_offset
4507 - htab
->lazy_plt
->plt0_got2_insn_end
),
4508 (htab
->elf
.splt
->contents
4509 + htab
->lazy_plt
->plt0_got2_offset
));
4511 if (htab
->tlsdesc_plt
)
4513 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4514 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
4516 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
4517 htab
->lazy_plt
->plt0_entry
,
4518 htab
->lazy_plt
->plt0_entry_size
);
4520 /* Add offset for pushq GOT+8(%rip), since the
4521 instruction uses 6 bytes subtract this value. */
4522 bfd_put_32 (output_bfd
,
4523 (htab
->elf
.sgotplt
->output_section
->vma
4524 + htab
->elf
.sgotplt
->output_offset
4526 - htab
->elf
.splt
->output_section
->vma
4527 - htab
->elf
.splt
->output_offset
4530 (htab
->elf
.splt
->contents
4532 + htab
->lazy_plt
->plt0_got1_offset
));
4533 /* Add offset for the PC-relative instruction accessing
4534 GOT+TDG, where TDG stands for htab->tlsdesc_got,
4535 subtracting the offset to the end of that
4537 bfd_put_32 (output_bfd
,
4538 (htab
->elf
.sgot
->output_section
->vma
4539 + htab
->elf
.sgot
->output_offset
4541 - htab
->elf
.splt
->output_section
->vma
4542 - htab
->elf
.splt
->output_offset
4544 - htab
->lazy_plt
->plt0_got2_insn_end
),
4545 (htab
->elf
.splt
->contents
4547 + htab
->lazy_plt
->plt0_got2_offset
));
4552 if (htab
->plt_got
!= NULL
&& htab
->plt_got
->size
> 0)
4553 elf_section_data (htab
->plt_got
->output_section
)
4554 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
4556 if (htab
->plt_second
!= NULL
&& htab
->plt_second
->size
> 0)
4557 elf_section_data (htab
->plt_second
->output_section
)
4558 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
4561 /* GOT is always created in setup_gnu_properties. But it may not be
4563 if (htab
->elf
.sgotplt
&& htab
->elf
.sgotplt
->size
> 0)
4565 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4568 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4572 /* Set the first entry in the global offset table to the address of
4573 the dynamic section. */
4575 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
4577 bfd_put_64 (output_bfd
,
4578 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
4579 htab
->elf
.sgotplt
->contents
);
4580 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4581 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4582 htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
4583 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4584 htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
4586 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
4590 /* Adjust .eh_frame for .plt section. */
4591 if (htab
->plt_eh_frame
!= NULL
4592 && htab
->plt_eh_frame
->contents
!= NULL
)
4594 if (htab
->elf
.splt
!= NULL
4595 && htab
->elf
.splt
->size
!= 0
4596 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4597 && htab
->elf
.splt
->output_section
!= NULL
4598 && htab
->plt_eh_frame
->output_section
!= NULL
)
4600 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4601 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4602 + htab
->plt_eh_frame
->output_offset
4603 + PLT_FDE_START_OFFSET
;
4604 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4605 htab
->plt_eh_frame
->contents
4606 + PLT_FDE_START_OFFSET
);
4608 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4610 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4612 htab
->plt_eh_frame
->contents
))
4617 /* Adjust .eh_frame for .plt.got section. */
4618 if (htab
->plt_got_eh_frame
!= NULL
4619 && htab
->plt_got_eh_frame
->contents
!= NULL
)
4621 if (htab
->plt_got
!= NULL
4622 && htab
->plt_got
->size
!= 0
4623 && (htab
->plt_got
->flags
& SEC_EXCLUDE
) == 0
4624 && htab
->plt_got
->output_section
!= NULL
4625 && htab
->plt_got_eh_frame
->output_section
!= NULL
)
4627 bfd_vma plt_start
= htab
->plt_got
->output_section
->vma
;
4628 bfd_vma eh_frame_start
= htab
->plt_got_eh_frame
->output_section
->vma
4629 + htab
->plt_got_eh_frame
->output_offset
4630 + PLT_FDE_START_OFFSET
;
4631 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4632 htab
->plt_got_eh_frame
->contents
4633 + PLT_FDE_START_OFFSET
);
4635 if (htab
->plt_got_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4637 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4638 htab
->plt_got_eh_frame
,
4639 htab
->plt_got_eh_frame
->contents
))
4644 /* Adjust .eh_frame for the second PLT section. */
4645 if (htab
->plt_second_eh_frame
!= NULL
4646 && htab
->plt_second_eh_frame
->contents
!= NULL
)
4648 if (htab
->plt_second
!= NULL
4649 && htab
->plt_second
->size
!= 0
4650 && (htab
->plt_second
->flags
& SEC_EXCLUDE
) == 0
4651 && htab
->plt_second
->output_section
!= NULL
4652 && htab
->plt_second_eh_frame
->output_section
!= NULL
)
4654 bfd_vma plt_start
= htab
->plt_second
->output_section
->vma
;
4655 bfd_vma eh_frame_start
4656 = (htab
->plt_second_eh_frame
->output_section
->vma
4657 + htab
->plt_second_eh_frame
->output_offset
4658 + PLT_FDE_START_OFFSET
);
4659 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4660 htab
->plt_second_eh_frame
->contents
4661 + PLT_FDE_START_OFFSET
);
4663 if (htab
->plt_second_eh_frame
->sec_info_type
4664 == SEC_INFO_TYPE_EH_FRAME
)
4666 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4667 htab
->plt_second_eh_frame
,
4668 htab
->plt_second_eh_frame
->contents
))
4673 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4674 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
4677 /* Fill PLT entries for undefined weak symbols in PIE. */
4678 if (bfd_link_pie (info
))
4679 bfd_hash_traverse (&info
->hash
->table
,
4680 elf_x86_64_pie_finish_undefweak_symbol
,
4686 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4687 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4688 It has to be done before elf_link_sort_relocs is called so that
4689 dynamic relocations are properly sorted. */
4692 elf_x86_64_output_arch_local_syms
4693 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4694 struct bfd_link_info
*info
,
4695 void *flaginfo ATTRIBUTE_UNUSED
,
4696 int (*func
) (void *, const char *,
4699 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
4701 struct elf_x86_link_hash_table
*htab
4702 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
4706 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4707 htab_traverse (htab
->loc_hash_table
,
4708 elf_x86_64_finish_local_dynamic_symbol
,
4714 /* Forward declaration. */
4715 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
;
4717 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4718 dynamic relocations. */
4721 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
4722 long symcount ATTRIBUTE_UNUSED
,
4723 asymbol
**syms ATTRIBUTE_UNUSED
,
4730 bfd_byte
*plt_contents
;
4732 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
4733 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
4734 const struct elf_x86_lazy_plt_layout
*lazy_bnd_plt
;
4735 const struct elf_x86_non_lazy_plt_layout
*non_lazy_bnd_plt
;
4736 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
4737 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
4739 enum elf_x86_plt_type plt_type
;
4740 struct elf_x86_plt plts
[] =
4742 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
4743 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
4744 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4745 { ".plt.bnd", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4746 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
4751 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
4754 if (dynsymcount
<= 0)
4757 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
4761 if (get_elf_x86_64_backend_data (abfd
)->os
== is_normal
)
4763 lazy_plt
= &elf_x86_64_lazy_plt
;
4764 non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
4765 lazy_bnd_plt
= &elf_x86_64_lazy_bnd_plt
;
4766 non_lazy_bnd_plt
= &elf_x86_64_non_lazy_bnd_plt
;
4767 if (ABI_64_P (abfd
))
4769 lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
4770 non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
4774 lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
4775 non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
4780 lazy_plt
= &elf_x86_64_nacl_plt
;
4781 non_lazy_plt
= NULL
;
4782 lazy_bnd_plt
= NULL
;
4783 non_lazy_bnd_plt
= NULL
;
4784 lazy_ibt_plt
= NULL
;
4785 non_lazy_ibt_plt
= NULL
;
4789 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
4791 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
4792 if (plt
== NULL
|| plt
->size
== 0)
4795 /* Get the PLT section contents. */
4796 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
4797 if (plt_contents
== NULL
)
4799 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
4800 plt_contents
, 0, plt
->size
))
4802 free (plt_contents
);
4806 /* Check what kind of PLT it is. */
4807 plt_type
= plt_unknown
;
4808 if (plts
[j
].type
== plt_unknown
4809 && (plt
->size
>= (lazy_plt
->plt_entry_size
4810 + lazy_plt
->plt_entry_size
)))
4812 /* Match lazy PLT first. Need to check the first two
4814 if ((memcmp (plt_contents
, lazy_plt
->plt0_entry
,
4815 lazy_plt
->plt0_got1_offset
) == 0)
4816 && (memcmp (plt_contents
+ 6, lazy_plt
->plt0_entry
+ 6,
4818 plt_type
= plt_lazy
;
4819 else if (lazy_bnd_plt
!= NULL
4820 && (memcmp (plt_contents
, lazy_bnd_plt
->plt0_entry
,
4821 lazy_bnd_plt
->plt0_got1_offset
) == 0)
4822 && (memcmp (plt_contents
+ 6,
4823 lazy_bnd_plt
->plt0_entry
+ 6, 3) == 0))
4825 plt_type
= plt_lazy
| plt_second
;
4826 /* The fist entry in the lazy IBT PLT is the same as the
4828 if ((memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
4829 lazy_ibt_plt
->plt_entry
,
4830 lazy_ibt_plt
->plt_got_offset
) == 0))
4831 lazy_plt
= lazy_ibt_plt
;
4833 lazy_plt
= lazy_bnd_plt
;
4837 if (non_lazy_plt
!= NULL
4838 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
4839 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
4841 /* Match non-lazy PLT. */
4842 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
4843 non_lazy_plt
->plt_got_offset
) == 0)
4844 plt_type
= plt_non_lazy
;
4847 if (plt_type
== plt_unknown
|| plt_type
== plt_second
)
4849 if (non_lazy_bnd_plt
!= NULL
4850 && plt
->size
>= non_lazy_bnd_plt
->plt_entry_size
4851 && (memcmp (plt_contents
, non_lazy_bnd_plt
->plt_entry
,
4852 non_lazy_bnd_plt
->plt_got_offset
) == 0))
4854 /* Match BND PLT. */
4855 plt_type
= plt_second
;
4856 non_lazy_plt
= non_lazy_bnd_plt
;
4858 else if (non_lazy_ibt_plt
!= NULL
4859 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
4860 && (memcmp (plt_contents
,
4861 non_lazy_ibt_plt
->plt_entry
,
4862 non_lazy_ibt_plt
->plt_got_offset
) == 0))
4864 /* Match IBT PLT. */
4865 plt_type
= plt_second
;
4866 non_lazy_plt
= non_lazy_ibt_plt
;
4870 if (plt_type
== plt_unknown
)
4872 free (plt_contents
);
4877 plts
[j
].type
= plt_type
;
4879 if ((plt_type
& plt_lazy
))
4881 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
4882 plts
[j
].plt_got_insn_size
= lazy_plt
->plt_got_insn_size
;
4883 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
4884 /* Skip PLT0 in lazy PLT. */
4889 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
4890 plts
[j
].plt_got_insn_size
= non_lazy_plt
->plt_got_insn_size
;
4891 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
4895 /* Skip lazy PLT when the second PLT is used. */
4896 if (plt_type
== (plt_lazy
| plt_second
))
4900 n
= plt
->size
/ plts
[j
].plt_entry_size
;
4905 plts
[j
].contents
= plt_contents
;
4908 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
4909 (bfd_vma
) 0, plts
, dynsyms
,
4913 /* Handle an x86-64 specific section when reading an object file. This
4914 is called when elfcode.h finds a section with an unknown type. */
4917 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
4918 const char *name
, int shindex
)
4920 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
4923 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
4929 /* Hook called by the linker routine which adds symbols from an object
4930 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4934 elf_x86_64_add_symbol_hook (bfd
*abfd
,
4935 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4936 Elf_Internal_Sym
*sym
,
4937 const char **namep ATTRIBUTE_UNUSED
,
4938 flagword
*flagsp ATTRIBUTE_UNUSED
,
4944 switch (sym
->st_shndx
)
4946 case SHN_X86_64_LCOMMON
:
4947 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
4950 lcomm
= bfd_make_section_with_flags (abfd
,
4954 | SEC_LINKER_CREATED
));
4957 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
4960 *valp
= sym
->st_size
;
4968 /* Given a BFD section, try to locate the corresponding ELF section
4972 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
4973 asection
*sec
, int *index_return
)
4975 if (sec
== &_bfd_elf_large_com_section
)
4977 *index_return
= SHN_X86_64_LCOMMON
;
4983 /* Process a symbol. */
4986 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
4989 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
4991 switch (elfsym
->internal_elf_sym
.st_shndx
)
4993 case SHN_X86_64_LCOMMON
:
4994 asym
->section
= &_bfd_elf_large_com_section
;
4995 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
4996 /* Common symbol doesn't set BSF_GLOBAL. */
4997 asym
->flags
&= ~BSF_GLOBAL
;
5003 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5005 return (sym
->st_shndx
== SHN_COMMON
5006 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5010 elf_x86_64_common_section_index (asection
*sec
)
5012 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5015 return SHN_X86_64_LCOMMON
;
5019 elf_x86_64_common_section (asection
*sec
)
5021 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5022 return bfd_com_section_ptr
;
5024 return &_bfd_elf_large_com_section
;
5028 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5029 const Elf_Internal_Sym
*sym
,
5034 const asection
*oldsec
)
5036 /* A normal common symbol and a large common symbol result in a
5037 normal common symbol. We turn the large common symbol into a
5040 && h
->root
.type
== bfd_link_hash_common
5042 && bfd_is_com_section (*psec
)
5045 if (sym
->st_shndx
== SHN_COMMON
5046 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5048 h
->root
.u
.c
.p
->section
5049 = bfd_make_section_old_way (oldbfd
, "COMMON");
5050 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5052 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5053 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5054 *psec
= bfd_com_section_ptr
;
5061 elf_x86_64_additional_program_headers (bfd
*abfd
,
5062 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5067 /* Check to see if we need a large readonly segment. */
5068 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5069 if (s
&& (s
->flags
& SEC_LOAD
))
5072 /* Check to see if we need a large data segment. Since .lbss sections
5073 is placed right after the .bss section, there should be no need for
5074 a large data segment just because of .lbss. */
5075 s
= bfd_get_section_by_name (abfd
, ".ldata");
5076 if (s
&& (s
->flags
& SEC_LOAD
))
5082 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5085 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5086 const bfd_target
*output
)
5088 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5089 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5090 && _bfd_elf_relocs_compatible (input
, output
));
5093 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
5094 with GNU properties if found. Otherwise, return NULL. */
5097 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info
*info
)
5099 struct elf_x86_init_table init_table
;
5101 if ((int) R_X86_64_standard
>= (int) R_X86_64_converted_reloc_bit
5102 || (int) R_X86_64_max
<= (int) R_X86_64_converted_reloc_bit
5103 || ((int) (R_X86_64_GNU_VTINHERIT
| R_X86_64_converted_reloc_bit
)
5104 != (int) R_X86_64_GNU_VTINHERIT
)
5105 || ((int) (R_X86_64_GNU_VTENTRY
| R_X86_64_converted_reloc_bit
)
5106 != (int) R_X86_64_GNU_VTENTRY
))
5109 init_table
.is_vxworks
= FALSE
;
5110 if (get_elf_x86_64_backend_data (info
->output_bfd
)->os
== is_normal
)
5114 init_table
.lazy_plt
= &elf_x86_64_lazy_bnd_plt
;
5115 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_bnd_plt
;
5119 init_table
.lazy_plt
= &elf_x86_64_lazy_plt
;
5120 init_table
.non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
5123 if (ABI_64_P (info
->output_bfd
))
5125 init_table
.lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
5126 init_table
.non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
5130 init_table
.lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
5131 init_table
.non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
5133 init_table
.normal_target
= TRUE
;
5137 init_table
.lazy_plt
= &elf_x86_64_nacl_plt
;
5138 init_table
.non_lazy_plt
= NULL
;
5139 init_table
.lazy_ibt_plt
= NULL
;
5140 init_table
.non_lazy_ibt_plt
= NULL
;
5141 init_table
.normal_target
= FALSE
;
5144 if (ABI_64_P (info
->output_bfd
))
5146 init_table
.r_info
= elf64_r_info
;
5147 init_table
.r_sym
= elf64_r_sym
;
5151 init_table
.r_info
= elf32_r_info
;
5152 init_table
.r_sym
= elf32_r_sym
;
5155 return _bfd_x86_elf_link_setup_gnu_properties (info
, &init_table
);
5158 static const struct bfd_elf_special_section
5159 elf_x86_64_special_sections
[]=
5161 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5162 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5163 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5164 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5165 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5166 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5167 { NULL
, 0, 0, 0, 0 }
5170 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5171 #define TARGET_LITTLE_NAME "elf64-x86-64"
5172 #define ELF_ARCH bfd_arch_i386
5173 #define ELF_TARGET_ID X86_64_ELF_DATA
5174 #define ELF_MACHINE_CODE EM_X86_64
5175 #define ELF_MAXPAGESIZE 0x200000
5176 #define ELF_MINPAGESIZE 0x1000
5177 #define ELF_COMMONPAGESIZE 0x1000
5179 #define elf_backend_can_gc_sections 1
5180 #define elf_backend_can_refcount 1
5181 #define elf_backend_want_got_plt 1
5182 #define elf_backend_plt_readonly 1
5183 #define elf_backend_want_plt_sym 0
5184 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5185 #define elf_backend_rela_normal 1
5186 #define elf_backend_plt_alignment 4
5187 #define elf_backend_extern_protected_data 1
5188 #define elf_backend_caches_rawsize 1
5189 #define elf_backend_dtrel_excludes_plt 1
5190 #define elf_backend_want_dynrelro 1
5192 #define elf_info_to_howto elf_x86_64_info_to_howto
5194 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5195 #define bfd_elf64_bfd_reloc_name_lookup \
5196 elf_x86_64_reloc_name_lookup
5198 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5199 #define elf_backend_check_relocs elf_x86_64_check_relocs
5200 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5201 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5202 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5203 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
5204 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5205 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5207 #define elf_backend_write_core_note elf_x86_64_write_core_note
5209 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5210 #define elf_backend_relocate_section elf_x86_64_relocate_section
5211 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5212 #define elf_backend_object_p elf64_x86_64_elf_object_p
5213 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5215 #define elf_backend_section_from_shdr \
5216 elf_x86_64_section_from_shdr
5218 #define elf_backend_section_from_bfd_section \
5219 elf_x86_64_elf_section_from_bfd_section
5220 #define elf_backend_add_symbol_hook \
5221 elf_x86_64_add_symbol_hook
5222 #define elf_backend_symbol_processing \
5223 elf_x86_64_symbol_processing
5224 #define elf_backend_common_section_index \
5225 elf_x86_64_common_section_index
5226 #define elf_backend_common_section \
5227 elf_x86_64_common_section
5228 #define elf_backend_common_definition \
5229 elf_x86_64_common_definition
5230 #define elf_backend_merge_symbol \
5231 elf_x86_64_merge_symbol
5232 #define elf_backend_special_sections \
5233 elf_x86_64_special_sections
5234 #define elf_backend_additional_program_headers \
5235 elf_x86_64_additional_program_headers
5236 #define elf_backend_setup_gnu_properties \
5237 elf_x86_64_link_setup_gnu_properties
5239 #include "elf64-target.h"
5241 /* CloudABI support. */
5243 #undef TARGET_LITTLE_SYM
5244 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5245 #undef TARGET_LITTLE_NAME
5246 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5249 #define ELF_OSABI ELFOSABI_CLOUDABI
5252 #define elf64_bed elf64_x86_64_cloudabi_bed
5254 #include "elf64-target.h"
5256 /* FreeBSD support. */
5258 #undef TARGET_LITTLE_SYM
5259 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5260 #undef TARGET_LITTLE_NAME
5261 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5264 #define ELF_OSABI ELFOSABI_FREEBSD
5267 #define elf64_bed elf64_x86_64_fbsd_bed
5269 #include "elf64-target.h"
5271 /* Solaris 2 support. */
5273 #undef TARGET_LITTLE_SYM
5274 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5275 #undef TARGET_LITTLE_NAME
5276 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5278 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5279 objects won't be recognized. */
5283 #define elf64_bed elf64_x86_64_sol2_bed
5285 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5287 #undef elf_backend_static_tls_alignment
5288 #define elf_backend_static_tls_alignment 16
5290 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5292 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5294 #undef elf_backend_want_plt_sym
5295 #define elf_backend_want_plt_sym 1
5297 #undef elf_backend_strtab_flags
5298 #define elf_backend_strtab_flags SHF_STRINGS
5301 elf64_x86_64_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
5302 bfd
*obfd ATTRIBUTE_UNUSED
,
5303 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
5304 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
5306 /* PR 19938: FIXME: Need to add code for setting the sh_info
5307 and sh_link fields of Solaris specific section types. */
5311 #undef elf_backend_copy_special_section_fields
5312 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
5314 #include "elf64-target.h"
5316 /* Native Client support. */
5319 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
5321 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5322 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
5326 #undef TARGET_LITTLE_SYM
5327 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
5328 #undef TARGET_LITTLE_NAME
5329 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5331 #define elf64_bed elf64_x86_64_nacl_bed
5333 #undef ELF_MAXPAGESIZE
5334 #undef ELF_MINPAGESIZE
5335 #undef ELF_COMMONPAGESIZE
5336 #define ELF_MAXPAGESIZE 0x10000
5337 #define ELF_MINPAGESIZE 0x10000
5338 #define ELF_COMMONPAGESIZE 0x10000
5340 /* Restore defaults. */
5342 #undef elf_backend_static_tls_alignment
5343 #undef elf_backend_want_plt_sym
5344 #define elf_backend_want_plt_sym 0
5345 #undef elf_backend_strtab_flags
5346 #undef elf_backend_copy_special_section_fields
5348 /* NaCl uses substantially different PLT entries for the same effects. */
5350 #undef elf_backend_plt_alignment
5351 #define elf_backend_plt_alignment 5
5352 #define NACL_PLT_ENTRY_SIZE 64
5353 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5355 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
5357 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5358 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5359 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5360 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5361 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5363 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5364 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
5366 /* 32 bytes of nop to pad out to the standard size. */
5367 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5368 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5369 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5370 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5371 0x66, /* excess data16 prefix */
5375 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5377 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5378 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5379 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5380 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5382 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5383 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5384 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5386 /* Lazy GOT entries point here (32-byte aligned). */
5387 0x68, /* pushq immediate */
5388 0, 0, 0, 0, /* replaced with index into relocation table. */
5389 0xe9, /* jmp relative */
5390 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5392 /* 22 bytes of nop to pad out to the standard size. */
5393 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5394 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5395 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5398 /* .eh_frame covering the .plt section. */
5400 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
5402 #if (PLT_CIE_LENGTH != 20 \
5403 || PLT_FDE_LENGTH != 36 \
5404 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5405 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5406 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5408 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5409 0, 0, 0, 0, /* CIE ID */
5410 1, /* CIE version */
5411 'z', 'R', 0, /* Augmentation string */
5412 1, /* Code alignment factor */
5413 0x78, /* Data alignment factor */
5414 16, /* Return address column */
5415 1, /* Augmentation size */
5416 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5417 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5418 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5419 DW_CFA_nop
, DW_CFA_nop
,
5421 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5422 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
5423 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5424 0, 0, 0, 0, /* .plt size goes here */
5425 0, /* Augmentation size */
5426 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
5427 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5428 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
5429 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5430 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5431 13, /* Block length */
5432 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
5433 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
5434 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5435 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
5436 DW_CFA_nop
, DW_CFA_nop
5439 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
=
5441 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
5442 NACL_PLT_ENTRY_SIZE
, /* plt0_entry_size */
5443 elf_x86_64_nacl_plt_entry
, /* plt_entry */
5444 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5445 2, /* plt0_got1_offset */
5446 9, /* plt0_got2_offset */
5447 13, /* plt0_got2_insn_end */
5448 3, /* plt_got_offset */
5449 33, /* plt_reloc_offset */
5450 38, /* plt_plt_offset */
5451 7, /* plt_got_insn_size */
5452 42, /* plt_plt_insn_end */
5453 32, /* plt_lazy_offset */
5454 elf_x86_64_nacl_plt0_entry
, /* pic_plt0_entry */
5455 elf_x86_64_nacl_plt_entry
, /* pic_plt_entry */
5456 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
5457 sizeof (elf_x86_64_nacl_eh_frame_plt
) /* eh_frame_plt_size */
5460 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
5465 #undef elf_backend_arch_data
5466 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5468 #undef elf_backend_object_p
5469 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5470 #undef elf_backend_modify_segment_map
5471 #define elf_backend_modify_segment_map nacl_modify_segment_map
5472 #undef elf_backend_modify_program_headers
5473 #define elf_backend_modify_program_headers nacl_modify_program_headers
5474 #undef elf_backend_final_write_processing
5475 #define elf_backend_final_write_processing nacl_final_write_processing
5477 #include "elf64-target.h"
5479 /* Native Client x32 support. */
5482 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
5484 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5485 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
5489 #undef TARGET_LITTLE_SYM
5490 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
5491 #undef TARGET_LITTLE_NAME
5492 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5494 #define elf32_bed elf32_x86_64_nacl_bed
5496 #define bfd_elf32_bfd_reloc_type_lookup \
5497 elf_x86_64_reloc_type_lookup
5498 #define bfd_elf32_bfd_reloc_name_lookup \
5499 elf_x86_64_reloc_name_lookup
5500 #define bfd_elf32_get_synthetic_symtab \
5501 elf_x86_64_get_synthetic_symtab
5503 #undef elf_backend_object_p
5504 #define elf_backend_object_p \
5505 elf32_x86_64_nacl_elf_object_p
5507 #undef elf_backend_bfd_from_remote_memory
5508 #define elf_backend_bfd_from_remote_memory \
5509 _bfd_elf32_bfd_from_remote_memory
5511 #undef elf_backend_size_info
5512 #define elf_backend_size_info \
5513 _bfd_elf32_size_info
5515 #include "elf32-target.h"
5517 /* Restore defaults. */
5518 #undef elf_backend_object_p
5519 #define elf_backend_object_p elf64_x86_64_elf_object_p
5520 #undef elf_backend_bfd_from_remote_memory
5521 #undef elf_backend_size_info
5522 #undef elf_backend_modify_segment_map
5523 #undef elf_backend_modify_program_headers
5524 #undef elf_backend_final_write_processing
5526 /* Intel L1OM support. */
5529 elf64_l1om_elf_object_p (bfd
*abfd
)
5531 /* Set the right machine number for an L1OM elf64 file. */
5532 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5536 #undef TARGET_LITTLE_SYM
5537 #define TARGET_LITTLE_SYM l1om_elf64_vec
5538 #undef TARGET_LITTLE_NAME
5539 #define TARGET_LITTLE_NAME "elf64-l1om"
5541 #define ELF_ARCH bfd_arch_l1om
5543 #undef ELF_MACHINE_CODE
5544 #define ELF_MACHINE_CODE EM_L1OM
5549 #define elf64_bed elf64_l1om_bed
5551 #undef elf_backend_object_p
5552 #define elf_backend_object_p elf64_l1om_elf_object_p
5554 /* Restore defaults. */
5555 #undef ELF_MAXPAGESIZE
5556 #undef ELF_MINPAGESIZE
5557 #undef ELF_COMMONPAGESIZE
5558 #define ELF_MAXPAGESIZE 0x200000
5559 #define ELF_MINPAGESIZE 0x1000
5560 #define ELF_COMMONPAGESIZE 0x1000
5561 #undef elf_backend_plt_alignment
5562 #define elf_backend_plt_alignment 4
5563 #undef elf_backend_arch_data
5564 #define elf_backend_arch_data &elf_x86_64_arch_bed
5566 #include "elf64-target.h"
5568 /* FreeBSD L1OM support. */
5570 #undef TARGET_LITTLE_SYM
5571 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5572 #undef TARGET_LITTLE_NAME
5573 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5576 #define ELF_OSABI ELFOSABI_FREEBSD
5579 #define elf64_bed elf64_l1om_fbsd_bed
5581 #include "elf64-target.h"
5583 /* Intel K1OM support. */
5586 elf64_k1om_elf_object_p (bfd
*abfd
)
5588 /* Set the right machine number for an K1OM elf64 file. */
5589 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5593 #undef TARGET_LITTLE_SYM
5594 #define TARGET_LITTLE_SYM k1om_elf64_vec
5595 #undef TARGET_LITTLE_NAME
5596 #define TARGET_LITTLE_NAME "elf64-k1om"
5598 #define ELF_ARCH bfd_arch_k1om
5600 #undef ELF_MACHINE_CODE
5601 #define ELF_MACHINE_CODE EM_K1OM
5606 #define elf64_bed elf64_k1om_bed
5608 #undef elf_backend_object_p
5609 #define elf_backend_object_p elf64_k1om_elf_object_p
5611 #undef elf_backend_static_tls_alignment
5613 #undef elf_backend_want_plt_sym
5614 #define elf_backend_want_plt_sym 0
5616 #include "elf64-target.h"
5618 /* FreeBSD K1OM support. */
5620 #undef TARGET_LITTLE_SYM
5621 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
5622 #undef TARGET_LITTLE_NAME
5623 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5626 #define ELF_OSABI ELFOSABI_FREEBSD
5629 #define elf64_bed elf64_k1om_fbsd_bed
5631 #include "elf64-target.h"
5633 /* 32bit x86-64 support. */
5635 #undef TARGET_LITTLE_SYM
5636 #define TARGET_LITTLE_SYM x86_64_elf32_vec
5637 #undef TARGET_LITTLE_NAME
5638 #define TARGET_LITTLE_NAME "elf32-x86-64"
5642 #define ELF_ARCH bfd_arch_i386
5644 #undef ELF_MACHINE_CODE
5645 #define ELF_MACHINE_CODE EM_X86_64
5649 #undef elf_backend_object_p
5650 #define elf_backend_object_p \
5651 elf32_x86_64_elf_object_p
5653 #undef elf_backend_bfd_from_remote_memory
5654 #define elf_backend_bfd_from_remote_memory \
5655 _bfd_elf32_bfd_from_remote_memory
5657 #undef elf_backend_size_info
5658 #define elf_backend_size_info \
5659 _bfd_elf32_size_info
5661 #include "elf32-target.h"