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 #define IS_X86_64_PCREL_TYPE(TYPE) \
200 ( ((TYPE) == R_X86_64_PC8) \
201 || ((TYPE) == R_X86_64_PC16) \
202 || ((TYPE) == R_X86_64_PC32) \
203 || ((TYPE) == R_X86_64_PC32_BND) \
204 || ((TYPE) == R_X86_64_PC64))
206 /* Map BFD relocs to the x86_64 elf relocs. */
209 bfd_reloc_code_real_type bfd_reloc_val
;
210 unsigned char elf_reloc_val
;
213 static const struct elf_reloc_map x86_64_reloc_map
[] =
215 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
216 { BFD_RELOC_64
, R_X86_64_64
, },
217 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
218 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
219 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
220 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
221 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
222 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
223 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
224 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
225 { BFD_RELOC_32
, R_X86_64_32
, },
226 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
227 { BFD_RELOC_16
, R_X86_64_16
, },
228 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
229 { BFD_RELOC_8
, R_X86_64_8
, },
230 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
231 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
232 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
233 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
234 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
235 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
236 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
237 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
238 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
239 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
240 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
241 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
242 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
243 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
244 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
245 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
246 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
247 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
248 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
249 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
250 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
251 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
252 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
253 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
, },
254 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
, },
255 { BFD_RELOC_X86_64_GOTPCRELX
, R_X86_64_GOTPCRELX
, },
256 { BFD_RELOC_X86_64_REX_GOTPCRELX
, R_X86_64_REX_GOTPCRELX
, },
257 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
258 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
261 static reloc_howto_type
*
262 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
266 if (r_type
== (unsigned int) R_X86_64_32
)
271 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
273 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
274 || r_type
>= (unsigned int) R_X86_64_max
)
276 if (r_type
>= (unsigned int) R_X86_64_standard
)
278 /* xgettext:c-format */
279 _bfd_error_handler (_("%B: invalid relocation type %d"),
281 r_type
= R_X86_64_NONE
;
286 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
287 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
288 return &x86_64_elf_howto_table
[i
];
291 /* Given a BFD reloc type, return a HOWTO structure. */
292 static reloc_howto_type
*
293 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
294 bfd_reloc_code_real_type code
)
298 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
301 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
302 return elf_x86_64_rtype_to_howto (abfd
,
303 x86_64_reloc_map
[i
].elf_reloc_val
);
308 static reloc_howto_type
*
309 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
314 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
316 /* Get x32 R_X86_64_32. */
317 reloc_howto_type
*reloc
318 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
319 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
323 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
324 if (x86_64_elf_howto_table
[i
].name
!= NULL
325 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
326 return &x86_64_elf_howto_table
[i
];
331 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
334 elf_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
335 Elf_Internal_Rela
*dst
)
339 r_type
= ELF32_R_TYPE (dst
->r_info
);
340 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
341 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
344 /* Support for core dump NOTE sections. */
346 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
351 switch (note
->descsz
)
356 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
358 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
361 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
369 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
371 elf_tdata (abfd
)->core
->signal
372 = bfd_get_16 (abfd
, note
->descdata
+ 12);
375 elf_tdata (abfd
)->core
->lwpid
376 = bfd_get_32 (abfd
, note
->descdata
+ 32);
385 /* Make a ".reg/999" section. */
386 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
387 size
, note
->descpos
+ offset
);
391 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
393 switch (note
->descsz
)
398 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
399 elf_tdata (abfd
)->core
->pid
400 = bfd_get_32 (abfd
, note
->descdata
+ 12);
401 elf_tdata (abfd
)->core
->program
402 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
403 elf_tdata (abfd
)->core
->command
404 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
407 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
408 elf_tdata (abfd
)->core
->pid
409 = bfd_get_32 (abfd
, note
->descdata
+ 24);
410 elf_tdata (abfd
)->core
->program
411 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
412 elf_tdata (abfd
)->core
->command
413 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
416 /* Note that for some reason, a spurious space is tacked
417 onto the end of the args in some (at least one anyway)
418 implementations, so strip it off if it exists. */
421 char *command
= elf_tdata (abfd
)->core
->command
;
422 int n
= strlen (command
);
424 if (0 < n
&& command
[n
- 1] == ' ')
425 command
[n
- 1] = '\0';
433 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
436 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
438 const char *fname
, *psargs
;
449 va_start (ap
, note_type
);
450 fname
= va_arg (ap
, const char *);
451 psargs
= va_arg (ap
, const char *);
454 if (bed
->s
->elfclass
== ELFCLASS32
)
457 memset (&data
, 0, sizeof (data
));
458 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
459 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
460 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
461 &data
, sizeof (data
));
466 memset (&data
, 0, sizeof (data
));
467 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
468 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
469 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
470 &data
, sizeof (data
));
475 va_start (ap
, note_type
);
476 pid
= va_arg (ap
, long);
477 cursig
= va_arg (ap
, int);
478 gregs
= va_arg (ap
, const void *);
481 if (bed
->s
->elfclass
== ELFCLASS32
)
483 if (bed
->elf_machine_code
== EM_X86_64
)
485 prstatusx32_t prstat
;
486 memset (&prstat
, 0, sizeof (prstat
));
488 prstat
.pr_cursig
= cursig
;
489 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
490 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
491 &prstat
, sizeof (prstat
));
496 memset (&prstat
, 0, sizeof (prstat
));
498 prstat
.pr_cursig
= cursig
;
499 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
500 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
501 &prstat
, sizeof (prstat
));
507 memset (&prstat
, 0, sizeof (prstat
));
509 prstat
.pr_cursig
= cursig
;
510 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
511 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
512 &prstat
, sizeof (prstat
));
519 /* Functions for the x86-64 ELF linker. */
521 /* The size in bytes of an entry in the global offset table. */
523 #define GOT_ENTRY_SIZE 8
525 /* The size in bytes of an entry in the lazy procedure linkage table. */
527 #define LAZY_PLT_ENTRY_SIZE 16
529 /* The size in bytes of an entry in the non-lazy procedure linkage
532 #define NON_LAZY_PLT_ENTRY_SIZE 8
534 /* The first entry in a lazy procedure linkage table looks like this.
535 See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this
538 static const bfd_byte elf_x86_64_lazy_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
540 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
541 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
542 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
545 /* Subsequent entries in a lazy procedure linkage table look like this. */
547 static const bfd_byte elf_x86_64_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
549 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
550 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
551 0x68, /* pushq immediate */
552 0, 0, 0, 0, /* replaced with index into relocation table. */
553 0xe9, /* jmp relative */
554 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
557 /* The first entry in a lazy procedure linkage table with BND prefix
560 static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
562 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
563 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
564 0x0f, 0x1f, 0 /* nopl (%rax) */
567 /* Subsequent entries for branches with BND prefx in a lazy procedure
568 linkage table look like this. */
570 static const bfd_byte elf_x86_64_lazy_bnd_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
572 0x68, 0, 0, 0, 0, /* pushq immediate */
573 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
574 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
577 /* The first entry in the IBT-enabled lazy procedure linkage table is the
578 the same as the lazy PLT with BND prefix so that bound registers are
579 preserved when control is passed to dynamic linker. Subsequent
580 entries for a IBT-enabled lazy procedure linkage table look like
583 static const bfd_byte elf_x86_64_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
585 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
586 0x68, 0, 0, 0, 0, /* pushq immediate */
587 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
591 /* The first entry in the x32 IBT-enabled lazy procedure linkage table
592 is the same as the normal lazy PLT. Subsequent entries for an
593 x32 IBT-enabled lazy procedure linkage table look like this. */
595 static const bfd_byte elf_x32_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
597 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
598 0x68, 0, 0, 0, 0, /* pushq immediate */
599 0xe9, 0, 0, 0, 0, /* jmpq relative */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries in the non-lazey procedure linkage table look like this. */
605 static const bfd_byte elf_x86_64_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
607 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
608 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
612 /* Entries for branches with BND prefix in the non-lazey procedure
613 linkage table look like this. */
615 static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
617 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
618 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
622 /* Entries for branches with IBT-enabled in the non-lazey procedure
623 linkage table look like this. They have the same size as the lazy
626 static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
628 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
629 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
630 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
631 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */
634 /* Entries for branches with IBT-enabled in the x32 non-lazey procedure
635 linkage table look like this. They have the same size as the lazy
638 static const bfd_byte elf_x32_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
640 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
641 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
642 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
643 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
646 /* .eh_frame covering the lazy .plt section. */
648 static const bfd_byte elf_x86_64_eh_frame_lazy_plt
[] =
650 #define PLT_CIE_LENGTH 20
651 #define PLT_FDE_LENGTH 36
652 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
653 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
654 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
655 0, 0, 0, 0, /* CIE ID */
657 'z', 'R', 0, /* Augmentation string */
658 1, /* Code alignment factor */
659 0x78, /* Data alignment factor */
660 16, /* Return address column */
661 1, /* Augmentation size */
662 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
663 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
664 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
665 DW_CFA_nop
, DW_CFA_nop
,
667 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
668 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
669 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
670 0, 0, 0, 0, /* .plt size goes here */
671 0, /* Augmentation size */
672 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
673 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
674 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
675 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
676 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
677 11, /* Block length */
678 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
679 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
680 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
681 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
682 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
685 /* .eh_frame covering the lazy BND .plt section. */
687 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt
[] =
689 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
690 0, 0, 0, 0, /* CIE ID */
692 'z', 'R', 0, /* Augmentation string */
693 1, /* Code alignment factor */
694 0x78, /* Data alignment factor */
695 16, /* Return address column */
696 1, /* Augmentation size */
697 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
698 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
699 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
700 DW_CFA_nop
, DW_CFA_nop
,
702 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
703 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
704 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
705 0, 0, 0, 0, /* .plt size goes here */
706 0, /* Augmentation size */
707 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
708 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
709 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
710 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
711 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
712 11, /* Block length */
713 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
714 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
715 DW_OP_lit15
, DW_OP_and
, DW_OP_lit5
, DW_OP_ge
,
716 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
717 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
720 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
722 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt
[] =
724 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
725 0, 0, 0, 0, /* CIE ID */
727 'z', 'R', 0, /* Augmentation string */
728 1, /* Code alignment factor */
729 0x78, /* Data alignment factor */
730 16, /* Return address column */
731 1, /* Augmentation size */
732 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
733 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
734 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
735 DW_CFA_nop
, DW_CFA_nop
,
737 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
738 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
739 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
740 0, 0, 0, 0, /* .plt size goes here */
741 0, /* Augmentation size */
742 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
743 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
744 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
745 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
746 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
747 11, /* Block length */
748 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
749 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
750 DW_OP_lit15
, DW_OP_and
, DW_OP_lit10
, DW_OP_ge
,
751 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
752 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
755 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
757 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt
[] =
759 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
760 0, 0, 0, 0, /* CIE ID */
762 'z', 'R', 0, /* Augmentation string */
763 1, /* Code alignment factor */
764 0x78, /* Data alignment factor */
765 16, /* Return address column */
766 1, /* Augmentation size */
767 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
768 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
769 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
770 DW_CFA_nop
, DW_CFA_nop
,
772 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
773 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
774 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
775 0, 0, 0, 0, /* .plt size goes here */
776 0, /* Augmentation size */
777 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
778 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
779 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
780 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
781 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
782 11, /* Block length */
783 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
784 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
785 DW_OP_lit15
, DW_OP_and
, DW_OP_lit9
, DW_OP_ge
,
786 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
787 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
790 /* .eh_frame covering the non-lazy .plt section. */
792 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt
[] =
794 #define PLT_GOT_FDE_LENGTH 20
795 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
796 0, 0, 0, 0, /* CIE ID */
798 'z', 'R', 0, /* Augmentation string */
799 1, /* Code alignment factor */
800 0x78, /* Data alignment factor */
801 16, /* Return address column */
802 1, /* Augmentation size */
803 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
804 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
805 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
806 DW_CFA_nop
, DW_CFA_nop
,
808 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
809 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
810 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
811 0, 0, 0, 0, /* non-lazy .plt size goes here */
812 0, /* Augmentation size */
813 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
,
814 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
817 /* Architecture-specific backend data for x86-64. */
819 struct elf_x86_64_backend_data
829 #define get_elf_x86_64_arch_data(bed) \
830 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
832 #define get_elf_x86_64_backend_data(abfd) \
833 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
835 /* These are the standard parameters. */
836 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt
=
838 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
839 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
840 elf_x86_64_lazy_plt_entry
, /* plt_entry */
841 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
842 2, /* plt0_got1_offset */
843 8, /* plt0_got2_offset */
844 12, /* plt0_got2_insn_end */
845 2, /* plt_got_offset */
846 7, /* plt_reloc_offset */
847 12, /* plt_plt_offset */
848 6, /* plt_got_insn_size */
849 LAZY_PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
850 6, /* plt_lazy_offset */
851 elf_x86_64_lazy_plt0_entry
, /* pic_plt0_entry */
852 elf_x86_64_lazy_plt_entry
, /* pic_plt_entry */
853 elf_x86_64_eh_frame_lazy_plt
, /* eh_frame_plt */
854 sizeof (elf_x86_64_eh_frame_lazy_plt
) /* eh_frame_plt_size */
857 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt
=
859 elf_x86_64_non_lazy_plt_entry
, /* plt_entry */
860 elf_x86_64_non_lazy_plt_entry
, /* pic_plt_entry */
861 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
862 2, /* plt_got_offset */
863 6, /* plt_got_insn_size */
864 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
865 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
868 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt
=
870 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
871 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
872 elf_x86_64_lazy_bnd_plt_entry
, /* plt_entry */
873 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
874 2, /* plt0_got1_offset */
875 1+8, /* plt0_got2_offset */
876 1+12, /* plt0_got2_insn_end */
877 1+2, /* plt_got_offset */
878 1, /* plt_reloc_offset */
879 7, /* plt_plt_offset */
880 1+6, /* plt_got_insn_size */
881 11, /* plt_plt_insn_end */
882 0, /* plt_lazy_offset */
883 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
884 elf_x86_64_lazy_bnd_plt_entry
, /* pic_plt_entry */
885 elf_x86_64_eh_frame_lazy_bnd_plt
, /* eh_frame_plt */
886 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt
) /* eh_frame_plt_size */
889 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt
=
891 elf_x86_64_non_lazy_bnd_plt_entry
, /* plt_entry */
892 elf_x86_64_non_lazy_bnd_plt_entry
, /* pic_plt_entry */
893 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
894 1+2, /* plt_got_offset */
895 1+6, /* plt_got_insn_size */
896 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
897 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
900 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt
=
902 elf_x86_64_lazy_bnd_plt0_entry
, /* plt0_entry */
903 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
904 elf_x86_64_lazy_ibt_plt_entry
, /* plt_entry */
905 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
906 2, /* plt0_got1_offset */
907 1+8, /* plt0_got2_offset */
908 1+12, /* plt0_got2_insn_end */
909 4+1+2, /* plt_got_offset */
910 4+1, /* plt_reloc_offset */
911 4+1+6, /* plt_plt_offset */
912 4+1+6, /* plt_got_insn_size */
913 4+1+5+5, /* plt_plt_insn_end */
914 0, /* plt_lazy_offset */
915 elf_x86_64_lazy_bnd_plt0_entry
, /* pic_plt0_entry */
916 elf_x86_64_lazy_ibt_plt_entry
, /* pic_plt_entry */
917 elf_x86_64_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
918 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
921 static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt
=
923 elf_x86_64_lazy_plt0_entry
, /* plt0_entry */
924 LAZY_PLT_ENTRY_SIZE
, /* plt0_entry_size */
925 elf_x32_lazy_ibt_plt_entry
, /* plt_entry */
926 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
927 2, /* plt0_got1_offset */
928 8, /* plt0_got2_offset */
929 12, /* plt0_got2_insn_end */
930 4+2, /* plt_got_offset */
931 4+1, /* plt_reloc_offset */
932 4+6, /* plt_plt_offset */
933 4+6, /* plt_got_insn_size */
934 4+5+5, /* plt_plt_insn_end */
935 0, /* plt_lazy_offset */
936 elf_x86_64_lazy_plt0_entry
, /* pic_plt0_entry */
937 elf_x32_lazy_ibt_plt_entry
, /* pic_plt_entry */
938 elf_x32_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
939 sizeof (elf_x32_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
942 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt
=
944 elf_x86_64_non_lazy_ibt_plt_entry
, /* plt_entry */
945 elf_x86_64_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
946 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
947 4+1+2, /* plt_got_offset */
948 4+1+6, /* plt_got_insn_size */
949 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
950 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
953 static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt
=
955 elf_x32_non_lazy_ibt_plt_entry
, /* plt_entry */
956 elf_x32_non_lazy_ibt_plt_entry
, /* pic_plt_entry */
957 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
958 4+2, /* plt_got_offset */
959 4+6, /* plt_got_insn_size */
960 elf_x86_64_eh_frame_non_lazy_plt
, /* eh_frame_plt */
961 sizeof (elf_x86_64_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
964 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
969 #define elf_backend_arch_data &elf_x86_64_arch_bed
971 /* Values in tls_type of x86 ELF linker hash entry. */
973 #define GOT_TLS_GDESC 4
974 #define GOT_TLS_GD_BOTH_P(type) \
975 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
976 #define GOT_TLS_GD_P(type) \
977 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
978 #define GOT_TLS_GDESC_P(type) \
979 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
980 #define GOT_TLS_GD_ANY_P(type) \
981 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
983 #define is_x86_64_elf(bfd) \
984 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
985 && elf_tdata (bfd) != NULL \
986 && elf_object_id (bfd) == X86_64_ELF_DATA)
988 #define elf_x86_64_compute_jump_table_size(htab) \
989 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
992 elf64_x86_64_elf_object_p (bfd
*abfd
)
994 /* Set the right machine number for an x86-64 elf64 file. */
995 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1000 elf32_x86_64_elf_object_p (bfd
*abfd
)
1002 /* Set the right machine number for an x86-64 elf32 file. */
1003 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1007 /* Return TRUE if the TLS access code sequence support transition
1011 elf_x86_64_check_tls_transition (bfd
*abfd
,
1012 struct bfd_link_info
*info
,
1015 Elf_Internal_Shdr
*symtab_hdr
,
1016 struct elf_link_hash_entry
**sym_hashes
,
1017 unsigned int r_type
,
1018 const Elf_Internal_Rela
*rel
,
1019 const Elf_Internal_Rela
*relend
)
1022 unsigned long r_symndx
;
1023 bfd_boolean largepic
= FALSE
;
1024 struct elf_link_hash_entry
*h
;
1026 struct elf_x86_link_hash_table
*htab
;
1028 bfd_boolean indirect_call
;
1030 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1031 offset
= rel
->r_offset
;
1034 case R_X86_64_TLSGD
:
1035 case R_X86_64_TLSLD
:
1036 if ((rel
+ 1) >= relend
)
1039 if (r_type
== R_X86_64_TLSGD
)
1041 /* Check transition from GD access model. For 64bit, only
1042 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1043 .word 0x6666; rex64; call __tls_get_addr@PLT
1045 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1047 call *__tls_get_addr@GOTPCREL(%rip)
1048 which may be converted to
1049 addr32 call __tls_get_addr
1050 can transit to different access model. For 32bit, only
1051 leaq foo@tlsgd(%rip), %rdi
1052 .word 0x6666; rex64; call __tls_get_addr@PLT
1054 leaq foo@tlsgd(%rip), %rdi
1056 call *__tls_get_addr@GOTPCREL(%rip)
1057 which may be converted to
1058 addr32 call __tls_get_addr
1059 can transit to different access model. For largepic,
1061 leaq foo@tlsgd(%rip), %rdi
1062 movabsq $__tls_get_addr@pltoff, %rax
1066 leaq foo@tlsgd(%rip), %rdi
1067 movabsq $__tls_get_addr@pltoff, %rax
1071 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1073 if ((offset
+ 12) > sec
->size
)
1076 call
= contents
+ offset
+ 4;
1078 || !((call
[1] == 0x48
1086 && call
[3] == 0xe8)))
1088 if (!ABI_64_P (abfd
)
1089 || (offset
+ 19) > sec
->size
1091 || memcmp (call
- 7, leaq
+ 1, 3) != 0
1092 || memcmp (call
, "\x48\xb8", 2) != 0
1096 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1097 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1101 else if (ABI_64_P (abfd
))
1104 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1110 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1113 indirect_call
= call
[2] == 0xff;
1117 /* Check transition from LD access model. Only
1118 leaq foo@tlsld(%rip), %rdi;
1119 call __tls_get_addr@PLT
1121 leaq foo@tlsld(%rip), %rdi;
1122 call *__tls_get_addr@GOTPCREL(%rip)
1123 which may be converted to
1124 addr32 call __tls_get_addr
1125 can transit to different access model. For largepic
1127 leaq foo@tlsld(%rip), %rdi
1128 movabsq $__tls_get_addr@pltoff, %rax
1132 leaq foo@tlsld(%rip), %rdi
1133 movabsq $__tls_get_addr@pltoff, %rax
1137 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1139 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1142 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1145 call
= contents
+ offset
+ 4;
1146 if (!(call
[0] == 0xe8
1147 || (call
[0] == 0xff && call
[1] == 0x15)
1148 || (call
[0] == 0x67 && call
[1] == 0xe8)))
1150 if (!ABI_64_P (abfd
)
1151 || (offset
+ 19) > sec
->size
1152 || memcmp (call
, "\x48\xb8", 2) != 0
1156 || !((call
[10] == 0x48 && call
[12] == 0xd8)
1157 || (call
[10] == 0x4c && call
[12] == 0xf8)))
1161 indirect_call
= call
[0] == 0xff;
1164 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1165 if (r_symndx
< symtab_hdr
->sh_info
)
1168 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1170 || !((struct elf_x86_link_hash_entry
*) h
)->tls_get_addr
)
1173 return ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLTOFF64
;
1174 else if (indirect_call
)
1175 return ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_GOTPCRELX
;
1177 return (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1178 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
);
1180 case R_X86_64_GOTTPOFF
:
1181 /* Check transition from IE access model:
1182 mov foo@gottpoff(%rip), %reg
1183 add foo@gottpoff(%rip), %reg
1186 /* Check REX prefix first. */
1187 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1189 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1190 if (val
!= 0x48 && val
!= 0x4c)
1192 /* X32 may have 0x44 REX prefix or no REX prefix. */
1193 if (ABI_64_P (abfd
))
1199 /* X32 may not have any REX prefix. */
1200 if (ABI_64_P (abfd
))
1202 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1206 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1207 if (val
!= 0x8b && val
!= 0x03)
1210 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1211 return (val
& 0xc7) == 5;
1213 case R_X86_64_GOTPC32_TLSDESC
:
1214 /* Check transition from GDesc access model:
1215 leaq x@tlsdesc(%rip), %rax
1217 Make sure it's a leaq adding rip to a 32-bit offset
1218 into any register, although it's probably almost always
1221 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1224 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1225 if ((val
& 0xfb) != 0x48)
1228 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1231 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1232 return (val
& 0xc7) == 0x05;
1234 case R_X86_64_TLSDESC_CALL
:
1235 /* Check transition from GDesc access model:
1236 call *x@tlsdesc(%rax)
1238 if (offset
+ 2 <= sec
->size
)
1240 /* Make sure that it's a call *x@tlsdesc(%rax). */
1241 call
= contents
+ offset
;
1242 return call
[0] == 0xff && call
[1] == 0x10;
1252 /* Return TRUE if the TLS access transition is OK or no transition
1253 will be performed. Update R_TYPE if there is a transition. */
1256 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1257 asection
*sec
, bfd_byte
*contents
,
1258 Elf_Internal_Shdr
*symtab_hdr
,
1259 struct elf_link_hash_entry
**sym_hashes
,
1260 unsigned int *r_type
, int tls_type
,
1261 const Elf_Internal_Rela
*rel
,
1262 const Elf_Internal_Rela
*relend
,
1263 struct elf_link_hash_entry
*h
,
1264 unsigned long r_symndx
,
1265 bfd_boolean from_relocate_section
)
1267 unsigned int from_type
= *r_type
;
1268 unsigned int to_type
= from_type
;
1269 bfd_boolean check
= TRUE
;
1271 /* Skip TLS transition for functions. */
1273 && (h
->type
== STT_FUNC
1274 || h
->type
== STT_GNU_IFUNC
))
1279 case R_X86_64_TLSGD
:
1280 case R_X86_64_GOTPC32_TLSDESC
:
1281 case R_X86_64_TLSDESC_CALL
:
1282 case R_X86_64_GOTTPOFF
:
1283 if (bfd_link_executable (info
))
1286 to_type
= R_X86_64_TPOFF32
;
1288 to_type
= R_X86_64_GOTTPOFF
;
1291 /* When we are called from elf_x86_64_relocate_section, there may
1292 be additional transitions based on TLS_TYPE. */
1293 if (from_relocate_section
)
1295 unsigned int new_to_type
= to_type
;
1297 if (bfd_link_executable (info
)
1300 && tls_type
== GOT_TLS_IE
)
1301 new_to_type
= R_X86_64_TPOFF32
;
1303 if (to_type
== R_X86_64_TLSGD
1304 || to_type
== R_X86_64_GOTPC32_TLSDESC
1305 || to_type
== R_X86_64_TLSDESC_CALL
)
1307 if (tls_type
== GOT_TLS_IE
)
1308 new_to_type
= R_X86_64_GOTTPOFF
;
1311 /* We checked the transition before when we were called from
1312 elf_x86_64_check_relocs. We only want to check the new
1313 transition which hasn't been checked before. */
1314 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1315 to_type
= new_to_type
;
1320 case R_X86_64_TLSLD
:
1321 if (bfd_link_executable (info
))
1322 to_type
= R_X86_64_TPOFF32
;
1329 /* Return TRUE if there is no transition. */
1330 if (from_type
== to_type
)
1333 /* Check if the transition can be performed. */
1335 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1336 symtab_hdr
, sym_hashes
,
1337 from_type
, rel
, relend
))
1339 reloc_howto_type
*from
, *to
;
1342 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1343 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1346 name
= h
->root
.root
.string
;
1349 struct elf_x86_link_hash_table
*htab
;
1351 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1356 Elf_Internal_Sym
*isym
;
1358 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1360 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1365 /* xgettext:c-format */
1366 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1367 "in section `%A' failed"),
1368 abfd
, from
->name
, to
->name
, name
, rel
->r_offset
, sec
);
1369 bfd_set_error (bfd_error_bad_value
);
1377 /* Rename some of the generic section flags to better document how they
1379 #define need_convert_load sec_flg0
1380 #define check_relocs_failed sec_flg1
1383 elf_x86_64_need_pic (struct bfd_link_info
*info
,
1384 bfd
*input_bfd
, asection
*sec
,
1385 struct elf_link_hash_entry
*h
,
1386 Elf_Internal_Shdr
*symtab_hdr
,
1387 Elf_Internal_Sym
*isym
,
1388 reloc_howto_type
*howto
)
1391 const char *und
= "";
1392 const char *pic
= "";
1398 name
= h
->root
.root
.string
;
1399 switch (ELF_ST_VISIBILITY (h
->other
))
1402 v
= _("hidden symbol ");
1405 v
= _("internal symbol ");
1408 v
= _("protected symbol ");
1411 if (((struct elf_x86_link_hash_entry
*) h
)->def_protected
)
1412 v
= _("protected symbol ");
1415 pic
= _("; recompile with -fPIC");
1419 if (!h
->def_regular
&& !h
->def_dynamic
)
1420 und
= _("undefined ");
1424 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, isym
, NULL
);
1425 pic
= _("; recompile with -fPIC");
1428 if (bfd_link_dll (info
))
1429 object
= _("a shared object");
1430 else if (bfd_link_pie (info
))
1431 object
= _("a PIE object");
1433 object
= _("a PDE object");
1435 /* xgettext:c-format */
1436 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1437 "not be used when making %s%s"),
1438 input_bfd
, howto
->name
, und
, v
, name
,
1440 bfd_set_error (bfd_error_bad_value
);
1441 sec
->check_relocs_failed
= 1;
1445 /* With the local symbol, foo, we convert
1446 mov foo@GOTPCREL(%rip), %reg
1450 call/jmp *foo@GOTPCREL(%rip)
1452 nop call foo/jmp foo nop
1453 When PIC is false, convert
1454 test %reg, foo@GOTPCREL(%rip)
1458 binop foo@GOTPCREL(%rip), %reg
1461 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1465 elf_x86_64_convert_load_reloc (bfd
*abfd
, asection
*sec
,
1467 Elf_Internal_Rela
*irel
,
1468 struct elf_link_hash_entry
*h
,
1469 bfd_boolean
*converted
,
1470 struct bfd_link_info
*link_info
)
1472 struct elf_x86_link_hash_table
*htab
;
1474 bfd_boolean require_reloc_pc32
;
1476 bfd_boolean to_reloc_pc32
;
1479 bfd_signed_vma raddend
;
1480 unsigned int opcode
;
1482 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
1483 unsigned int r_symndx
;
1485 bfd_vma roff
= irel
->r_offset
;
1487 if (roff
< (r_type
== R_X86_64_REX_GOTPCRELX
? 3 : 2))
1490 raddend
= irel
->r_addend
;
1491 /* Addend for 32-bit PC-relative relocation must be -4. */
1495 htab
= elf_x86_hash_table (link_info
, X86_64_ELF_DATA
);
1496 is_pic
= bfd_link_pic (link_info
);
1498 relocx
= (r_type
== R_X86_64_GOTPCRELX
1499 || r_type
== R_X86_64_REX_GOTPCRELX
);
1501 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
1504 = link_info
->disable_target_specific_optimizations
> 1;
1506 r_symndx
= htab
->r_sym (irel
->r_info
);
1508 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1510 /* Convert mov to lea since it has been done for a while. */
1513 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
1514 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
1515 test, xor instructions. */
1520 /* We convert only to R_X86_64_PC32:
1522 2. R_X86_64_GOTPCREL since we can't modify REX byte.
1523 3. require_reloc_pc32 is true.
1526 to_reloc_pc32
= (opcode
== 0xff
1528 || require_reloc_pc32
1531 /* Get the symbol referred to by the reloc. */
1534 Elf_Internal_Sym
*isym
1535 = bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
, r_symndx
);
1537 /* Skip relocation against undefined symbols. */
1538 if (isym
->st_shndx
== SHN_UNDEF
)
1541 symtype
= ELF_ST_TYPE (isym
->st_info
);
1543 if (isym
->st_shndx
== SHN_ABS
)
1544 tsec
= bfd_abs_section_ptr
;
1545 else if (isym
->st_shndx
== SHN_COMMON
)
1546 tsec
= bfd_com_section_ptr
;
1547 else if (isym
->st_shndx
== SHN_X86_64_LCOMMON
)
1548 tsec
= &_bfd_elf_large_com_section
;
1550 tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1552 toff
= isym
->st_value
;
1556 /* Undefined weak symbol is only bound locally in executable
1557 and its reference is resolved as 0 without relocation
1558 overflow. We can only perform this optimization for
1559 GOTPCRELX relocations since we need to modify REX byte.
1560 It is OK convert mov with R_X86_64_GOTPCREL to
1562 if ((relocx
|| opcode
== 0x8b)
1563 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info
,
1566 elf_x86_hash_entry (h
)))
1570 /* Skip for branch instructions since R_X86_64_PC32
1572 if (require_reloc_pc32
)
1577 /* For non-branch instructions, we can convert to
1578 R_X86_64_32/R_X86_64_32S since we know if there
1580 to_reloc_pc32
= FALSE
;
1583 /* Since we don't know the current PC when PIC is true,
1584 we can't convert to R_X86_64_PC32. */
1585 if (to_reloc_pc32
&& is_pic
)
1590 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
1591 ld.so may use its link-time address. */
1592 else if (h
->start_stop
1594 || h
->root
.type
== bfd_link_hash_defined
1595 || h
->root
.type
== bfd_link_hash_defweak
)
1596 && h
!= htab
->elf
.hdynamic
1597 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)))
1599 /* bfd_link_hash_new or bfd_link_hash_undefined is
1600 set by an assignment in a linker script in
1601 bfd_elf_record_link_assignment. start_stop is set
1602 on __start_SECNAME/__stop_SECNAME which mark section
1606 && (h
->root
.type
== bfd_link_hash_new
1607 || h
->root
.type
== bfd_link_hash_undefined
1608 || ((h
->root
.type
== bfd_link_hash_defined
1609 || h
->root
.type
== bfd_link_hash_defweak
)
1610 && h
->root
.u
.def
.section
== bfd_und_section_ptr
))))
1612 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
1613 if (require_reloc_pc32
)
1617 tsec
= h
->root
.u
.def
.section
;
1618 toff
= h
->root
.u
.def
.value
;
1625 /* Don't convert GOTPCREL relocation against large section. */
1626 if (elf_section_data (tsec
) != NULL
1627 && (elf_section_flags (tsec
) & SHF_X86_64_LARGE
) != 0)
1630 /* We can only estimate relocation overflow for R_X86_64_PC32. */
1634 if (tsec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
1636 /* At this stage in linking, no SEC_MERGE symbol has been
1637 adjusted, so all references to such symbols need to be
1638 passed through _bfd_merged_section_offset. (Later, in
1639 relocate_section, all SEC_MERGE symbols *except* for
1640 section symbols have been adjusted.)
1642 gas may reduce relocations against symbols in SEC_MERGE
1643 sections to a relocation against the section symbol when
1644 the original addend was zero. When the reloc is against
1645 a section symbol we should include the addend in the
1646 offset passed to _bfd_merged_section_offset, since the
1647 location of interest is the original symbol. On the
1648 other hand, an access to "sym+addend" where "sym" is not
1649 a section symbol should not include the addend; Such an
1650 access is presumed to be an offset from "sym"; The
1651 location of interest is just "sym". */
1652 if (symtype
== STT_SECTION
)
1655 toff
= _bfd_merged_section_offset (abfd
, &tsec
,
1656 elf_section_data (tsec
)->sec_info
,
1659 if (symtype
!= STT_SECTION
)
1665 /* Don't convert if R_X86_64_PC32 relocation overflows. */
1666 if (tsec
->output_section
== sec
->output_section
)
1668 if ((toff
- roff
+ 0x80000000) > 0xffffffff)
1673 bfd_signed_vma distance
;
1675 /* At this point, we don't know the load addresses of TSEC
1676 section nor SEC section. We estimate the distrance between
1677 SEC and TSEC. We store the estimated distances in the
1678 compressed_size field of the output section, which is only
1679 used to decompress the compressed input section. */
1680 if (sec
->output_section
->compressed_size
== 0)
1683 bfd_size_type size
= 0;
1684 for (asect
= link_info
->output_bfd
->sections
;
1686 asect
= asect
->next
)
1687 /* Skip debug sections since compressed_size is used to
1688 compress debug sections. */
1689 if ((asect
->flags
& SEC_DEBUGGING
) == 0)
1692 for (i
= asect
->map_head
.s
;
1696 size
= align_power (size
, i
->alignment_power
);
1699 asect
->compressed_size
= size
;
1703 /* Don't convert GOTPCREL relocations if TSEC isn't placed
1705 distance
= (tsec
->output_section
->compressed_size
1706 - sec
->output_section
->compressed_size
);
1710 /* Take PT_GNU_RELRO segment into account by adding
1712 if ((toff
+ distance
+ get_elf_backend_data (abfd
)->maxpagesize
1713 - roff
+ 0x80000000) > 0xffffffff)
1720 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
1725 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
1727 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1730 /* Convert to "jmp foo nop". */
1733 nop_offset
= irel
->r_offset
+ 3;
1734 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1735 irel
->r_offset
-= 1;
1736 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1740 struct elf_x86_link_hash_entry
*eh
1741 = (struct elf_x86_link_hash_entry
*) h
;
1743 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1746 /* To support TLS optimization, always use addr32 prefix for
1747 "call *__tls_get_addr@GOTPCREL(%rip)". */
1748 if (eh
&& eh
->tls_get_addr
)
1751 nop_offset
= irel
->r_offset
- 2;
1755 nop
= link_info
->call_nop_byte
;
1756 if (link_info
->call_nop_as_suffix
)
1758 nop_offset
= irel
->r_offset
+ 3;
1759 disp
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
1760 irel
->r_offset
-= 1;
1761 bfd_put_32 (abfd
, disp
, contents
+ irel
->r_offset
);
1764 nop_offset
= irel
->r_offset
- 2;
1767 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1768 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1769 r_type
= R_X86_64_PC32
;
1774 unsigned int rex_mask
= REX_R
;
1776 if (r_type
== R_X86_64_REX_GOTPCRELX
)
1777 rex
= bfd_get_8 (abfd
, contents
+ roff
- 3);
1785 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1786 "lea foo(%rip), %reg". */
1788 r_type
= R_X86_64_PC32
;
1792 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1793 "mov $foo, %reg". */
1795 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1796 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1797 if ((rex
& REX_W
) != 0
1798 && ABI_64_P (link_info
->output_bfd
))
1800 /* Keep the REX_W bit in REX byte for LP64. */
1801 r_type
= R_X86_64_32S
;
1802 goto rewrite_modrm_rex
;
1806 /* If the REX_W bit in REX byte isn't needed,
1807 use R_X86_64_32 and clear the W bit to avoid
1808 sign-extend imm32 to imm64. */
1809 r_type
= R_X86_64_32
;
1810 /* Clear the W bit in REX byte. */
1812 goto rewrite_modrm_rex
;
1818 /* R_X86_64_PC32 isn't supported. */
1822 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1825 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
1826 "test $foo, %reg". */
1827 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1832 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
1833 "binop $foo, %reg". */
1834 modrm
= 0xc0 | (modrm
& 0x38) >> 3 | (opcode
& 0x3c);
1838 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
1839 overflow when sign-extending imm32 to imm64. */
1840 r_type
= (rex
& REX_W
) != 0 ? R_X86_64_32S
: R_X86_64_32
;
1843 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1847 /* Move the R bit to the B bit in REX byte. */
1848 rex
= (rex
& ~rex_mask
) | (rex
& REX_R
) >> 2;
1849 bfd_put_8 (abfd
, rex
, contents
+ roff
- 3);
1852 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
1856 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1859 irel
->r_info
= htab
->r_info (r_symndx
, r_type
);
1866 /* Look through the relocs for a section during the first phase, and
1867 calculate needed space in the global offset table, procedure
1868 linkage table, and dynamic reloc sections. */
1871 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1873 const Elf_Internal_Rela
*relocs
)
1875 struct elf_x86_link_hash_table
*htab
;
1876 Elf_Internal_Shdr
*symtab_hdr
;
1877 struct elf_link_hash_entry
**sym_hashes
;
1878 const Elf_Internal_Rela
*rel
;
1879 const Elf_Internal_Rela
*rel_end
;
1883 if (bfd_link_relocatable (info
))
1886 /* Don't do anything special with non-loaded, non-alloced sections.
1887 In particular, any relocs in such sections should not affect GOT
1888 and PLT reference counting (ie. we don't allow them to create GOT
1889 or PLT entries), there's no possibility or desire to optimize TLS
1890 relocs, and there's not much point in propagating relocs to shared
1891 libs that the dynamic linker won't relocate. */
1892 if ((sec
->flags
& SEC_ALLOC
) == 0)
1895 BFD_ASSERT (is_x86_64_elf (abfd
));
1897 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
1900 sec
->check_relocs_failed
= 1;
1904 /* Get the section contents. */
1905 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1906 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1907 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1909 sec
->check_relocs_failed
= 1;
1913 symtab_hdr
= &elf_symtab_hdr (abfd
);
1914 sym_hashes
= elf_sym_hashes (abfd
);
1918 rel_end
= relocs
+ sec
->reloc_count
;
1919 for (rel
= relocs
; rel
< rel_end
; rel
++)
1921 unsigned int r_type
;
1922 unsigned int r_symndx
;
1923 struct elf_link_hash_entry
*h
;
1924 struct elf_x86_link_hash_entry
*eh
;
1925 Elf_Internal_Sym
*isym
;
1927 bfd_boolean size_reloc
;
1929 r_symndx
= htab
->r_sym (rel
->r_info
);
1930 r_type
= ELF32_R_TYPE (rel
->r_info
);
1932 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1934 /* xgettext:c-format */
1935 _bfd_error_handler (_("%B: bad symbol index: %d"),
1940 if (r_symndx
< symtab_hdr
->sh_info
)
1942 /* A local symbol. */
1943 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1948 /* Check relocation against local STT_GNU_IFUNC symbol. */
1949 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1951 h
= _bfd_elf_x86_get_local_sym_hash (htab
, abfd
, rel
,
1956 /* Fake a STT_GNU_IFUNC symbol. */
1957 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1959 h
->type
= STT_GNU_IFUNC
;
1962 h
->forced_local
= 1;
1963 h
->root
.type
= bfd_link_hash_defined
;
1971 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1972 while (h
->root
.type
== bfd_link_hash_indirect
1973 || h
->root
.type
== bfd_link_hash_warning
)
1974 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1977 /* Check invalid x32 relocations. */
1978 if (!ABI_64_P (abfd
))
1984 case R_X86_64_DTPOFF64
:
1985 case R_X86_64_TPOFF64
:
1987 case R_X86_64_GOTOFF64
:
1988 case R_X86_64_GOT64
:
1989 case R_X86_64_GOTPCREL64
:
1990 case R_X86_64_GOTPC64
:
1991 case R_X86_64_GOTPLT64
:
1992 case R_X86_64_PLTOFF64
:
1995 name
= h
->root
.root
.string
;
1997 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2000 /* xgettext:c-format */
2001 (_("%B: relocation %s against symbol `%s' isn't "
2002 "supported in x32 mode"), abfd
,
2003 x86_64_elf_howto_table
[r_type
].name
, name
);
2004 bfd_set_error (bfd_error_bad_value
);
2012 /* It is referenced by a non-shared object. */
2014 h
->root
.non_ir_ref_regular
= 1;
2016 if (h
->type
== STT_GNU_IFUNC
)
2017 elf_tdata (info
->output_bfd
)->has_gnu_symbols
2018 |= elf_gnu_symbol_ifunc
;
2021 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, contents
,
2022 symtab_hdr
, sym_hashes
,
2023 &r_type
, GOT_UNKNOWN
,
2024 rel
, rel_end
, h
, r_symndx
, FALSE
))
2027 eh
= (struct elf_x86_link_hash_entry
*) h
;
2030 case R_X86_64_TLSLD
:
2031 htab
->tls_ld_or_ldm_got
.refcount
+= 1;
2034 case R_X86_64_TPOFF32
:
2035 if (!bfd_link_executable (info
) && ABI_64_P (abfd
))
2036 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
2037 &x86_64_elf_howto_table
[r_type
]);
2039 eh
->has_got_reloc
= 1;
2042 case R_X86_64_GOTTPOFF
:
2043 if (!bfd_link_executable (info
))
2044 info
->flags
|= DF_STATIC_TLS
;
2047 case R_X86_64_GOT32
:
2048 case R_X86_64_GOTPCREL
:
2049 case R_X86_64_GOTPCRELX
:
2050 case R_X86_64_REX_GOTPCRELX
:
2051 case R_X86_64_TLSGD
:
2052 case R_X86_64_GOT64
:
2053 case R_X86_64_GOTPCREL64
:
2054 case R_X86_64_GOTPLT64
:
2055 case R_X86_64_GOTPC32_TLSDESC
:
2056 case R_X86_64_TLSDESC_CALL
:
2057 /* This symbol requires a global offset table entry. */
2059 int tls_type
, old_tls_type
;
2063 default: tls_type
= GOT_NORMAL
; break;
2064 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
2065 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
2066 case R_X86_64_GOTPC32_TLSDESC
:
2067 case R_X86_64_TLSDESC_CALL
:
2068 tls_type
= GOT_TLS_GDESC
; break;
2073 h
->got
.refcount
+= 1;
2074 old_tls_type
= eh
->tls_type
;
2078 bfd_signed_vma
*local_got_refcounts
;
2080 /* This is a global offset table entry for a local symbol. */
2081 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2082 if (local_got_refcounts
== NULL
)
2086 size
= symtab_hdr
->sh_info
;
2087 size
*= sizeof (bfd_signed_vma
)
2088 + sizeof (bfd_vma
) + sizeof (char);
2089 local_got_refcounts
= ((bfd_signed_vma
*)
2090 bfd_zalloc (abfd
, size
));
2091 if (local_got_refcounts
== NULL
)
2093 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2094 elf_x86_local_tlsdesc_gotent (abfd
)
2095 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2096 elf_x86_local_got_tls_type (abfd
)
2097 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2099 local_got_refcounts
[r_symndx
] += 1;
2101 = elf_x86_local_got_tls_type (abfd
) [r_symndx
];
2104 /* If a TLS symbol is accessed using IE at least once,
2105 there is no point to use dynamic model for it. */
2106 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2107 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2108 || tls_type
!= GOT_TLS_IE
))
2110 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
2111 tls_type
= old_tls_type
;
2112 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2113 && GOT_TLS_GD_ANY_P (tls_type
))
2114 tls_type
|= old_tls_type
;
2118 name
= h
->root
.root
.string
;
2120 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
2123 /* xgettext:c-format */
2124 (_("%B: '%s' accessed both as normal and"
2125 " thread local symbol"),
2127 bfd_set_error (bfd_error_bad_value
);
2132 if (old_tls_type
!= tls_type
)
2135 eh
->tls_type
= tls_type
;
2137 elf_x86_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2142 case R_X86_64_GOTOFF64
:
2143 case R_X86_64_GOTPC32
:
2144 case R_X86_64_GOTPC64
:
2147 eh
->has_got_reloc
= 1;
2150 case R_X86_64_PLT32
:
2151 case R_X86_64_PLT32_BND
:
2152 /* This symbol requires a procedure linkage table entry. We
2153 actually build the entry in adjust_dynamic_symbol,
2154 because this might be a case of linking PIC code which is
2155 never referenced by a dynamic object, in which case we
2156 don't need to generate a procedure linkage table entry
2159 /* If this is a local symbol, we resolve it directly without
2160 creating a procedure linkage table entry. */
2164 eh
->has_got_reloc
= 1;
2166 h
->plt
.refcount
+= 1;
2169 case R_X86_64_PLTOFF64
:
2170 /* This tries to form the 'address' of a function relative
2171 to GOT. For global symbols we need a PLT entry. */
2175 h
->plt
.refcount
+= 1;
2179 case R_X86_64_SIZE32
:
2180 case R_X86_64_SIZE64
:
2185 if (!ABI_64_P (abfd
))
2191 /* Check relocation overflow as these relocs may lead to
2192 run-time relocation overflow. Don't error out for
2193 sections we don't care about, such as debug sections or
2194 when relocation overflow check is disabled. */
2195 if (!info
->no_reloc_overflow_check
2196 && (bfd_link_pic (info
)
2197 || (bfd_link_executable (info
)
2201 && (sec
->flags
& SEC_READONLY
) == 0)))
2202 return elf_x86_64_need_pic (info
, abfd
, sec
, h
, symtab_hdr
, isym
,
2203 &x86_64_elf_howto_table
[r_type
]);
2209 case R_X86_64_PC32_BND
:
2213 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2214 eh
->has_non_got_reloc
= 1;
2215 /* We are called after all symbols have been resolved. Only
2216 relocation against STT_GNU_IFUNC symbol must go through
2219 && (bfd_link_executable (info
)
2220 || h
->type
== STT_GNU_IFUNC
))
2222 /* If this reloc is in a read-only section, we might
2223 need a copy reloc. We can't check reliably at this
2224 stage whether the section is read-only, as input
2225 sections have not yet been mapped to output sections.
2226 Tentatively set the flag for now, and correct in
2227 adjust_dynamic_symbol. */
2230 /* We may need a .plt entry if the symbol is a function
2231 defined in a shared lib or is a STT_GNU_IFUNC function
2232 referenced from the code or read-only section. */
2234 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2235 h
->plt
.refcount
+= 1;
2237 if (r_type
== R_X86_64_PC32
)
2239 /* Since something like ".long foo - ." may be used
2240 as pointer, make sure that PLT is used if foo is
2241 a function defined in a shared library. */
2242 if ((sec
->flags
& SEC_CODE
) == 0)
2243 h
->pointer_equality_needed
= 1;
2245 else if (r_type
!= R_X86_64_PC32_BND
2246 && r_type
!= R_X86_64_PC64
)
2248 h
->pointer_equality_needed
= 1;
2249 /* At run-time, R_X86_64_64 can be resolved for both
2250 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2251 can only be resolved for x32. */
2252 if ((sec
->flags
& SEC_READONLY
) == 0
2253 && (r_type
== R_X86_64_64
2254 || (!ABI_64_P (abfd
)
2255 && (r_type
== R_X86_64_32
2256 || r_type
== R_X86_64_32S
))))
2257 eh
->func_pointer_refcount
+= 1;
2263 /* If we are creating a shared library, and this is a reloc
2264 against a global symbol, or a non PC relative reloc
2265 against a local symbol, then we need to copy the reloc
2266 into the shared library. However, if we are linking with
2267 -Bsymbolic, we do not need to copy a reloc against a
2268 global symbol which is defined in an object we are
2269 including in the link (i.e., DEF_REGULAR is set). At
2270 this point we have not seen all the input files, so it is
2271 possible that DEF_REGULAR is not set now but will be set
2272 later (it is never cleared). In case of a weak definition,
2273 DEF_REGULAR may be cleared later by a strong definition in
2274 a shared library. We account for that possibility below by
2275 storing information in the relocs_copied field of the hash
2276 table entry. A similar situation occurs when creating
2277 shared libraries and symbol visibility changes render the
2280 If on the other hand, we are creating an executable, we
2281 may need to keep relocations for symbols satisfied by a
2282 dynamic library if we manage to avoid copy relocs for the
2285 Generate dynamic pointer relocation against STT_GNU_IFUNC
2286 symbol in the non-code section. */
2287 if ((bfd_link_pic (info
)
2288 && (! IS_X86_64_PCREL_TYPE (r_type
)
2290 && (! (bfd_link_pie (info
)
2291 || SYMBOLIC_BIND (info
, h
))
2292 || h
->root
.type
== bfd_link_hash_defweak
2293 || !h
->def_regular
))))
2295 && h
->type
== STT_GNU_IFUNC
2296 && r_type
== htab
->pointer_r_type
2297 && (sec
->flags
& SEC_CODE
) == 0)
2298 || (ELIMINATE_COPY_RELOCS
2299 && !bfd_link_pic (info
)
2301 && (h
->root
.type
== bfd_link_hash_defweak
2302 || !h
->def_regular
)))
2304 struct elf_dyn_relocs
*p
;
2305 struct elf_dyn_relocs
**head
;
2307 /* We must copy these reloc types into the output file.
2308 Create a reloc section in dynobj and make room for
2312 sreloc
= _bfd_elf_make_dynamic_reloc_section
2313 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2314 abfd
, /*rela?*/ TRUE
);
2320 /* If this is a global symbol, we count the number of
2321 relocations we need for this symbol. */
2323 head
= &eh
->dyn_relocs
;
2326 /* Track dynamic relocs needed for local syms too.
2327 We really need local syms available to do this
2332 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2337 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2341 /* Beware of type punned pointers vs strict aliasing
2343 vpp
= &(elf_section_data (s
)->local_dynrel
);
2344 head
= (struct elf_dyn_relocs
**)vpp
;
2348 if (p
== NULL
|| p
->sec
!= sec
)
2350 bfd_size_type amt
= sizeof *p
;
2352 p
= ((struct elf_dyn_relocs
*)
2353 bfd_alloc (htab
->elf
.dynobj
, amt
));
2364 /* Count size relocation as PC-relative relocation. */
2365 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
2370 /* This relocation describes the C++ object vtable hierarchy.
2371 Reconstruct it for later use during GC. */
2372 case R_X86_64_GNU_VTINHERIT
:
2373 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2377 /* This relocation describes which C++ vtable entries are actually
2378 used. Record for later use during GC. */
2379 case R_X86_64_GNU_VTENTRY
:
2380 BFD_ASSERT (h
!= NULL
);
2382 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2390 if ((r_type
== R_X86_64_GOTPCREL
2391 || r_type
== R_X86_64_GOTPCRELX
2392 || r_type
== R_X86_64_REX_GOTPCRELX
)
2393 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2394 sec
->need_convert_load
= 1;
2397 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2399 if (!info
->keep_memory
)
2403 /* Cache the section contents for elf_link_input_bfd. */
2404 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2411 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2413 sec
->check_relocs_failed
= 1;
2417 /* Return the section that should be marked against GC for a given
2421 elf_x86_64_gc_mark_hook (asection
*sec
,
2422 struct bfd_link_info
*info
,
2423 Elf_Internal_Rela
*rel
,
2424 struct elf_link_hash_entry
*h
,
2425 Elf_Internal_Sym
*sym
)
2428 switch (ELF32_R_TYPE (rel
->r_info
))
2430 case R_X86_64_GNU_VTINHERIT
:
2431 case R_X86_64_GNU_VTENTRY
:
2435 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2438 /* Adjust a symbol defined by a dynamic object and referenced by a
2439 regular object. The current definition is in some section of the
2440 dynamic object, but we're not including those sections. We have to
2441 change the definition to something the rest of the link can
2445 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2446 struct elf_link_hash_entry
*h
)
2448 struct elf_x86_link_hash_table
*htab
;
2450 struct elf_x86_link_hash_entry
*eh
;
2451 struct elf_dyn_relocs
*p
;
2453 /* STT_GNU_IFUNC symbol must go through PLT. */
2454 if (h
->type
== STT_GNU_IFUNC
)
2456 /* All local STT_GNU_IFUNC references must be treate as local
2457 calls via local PLT. */
2459 && SYMBOL_CALLS_LOCAL (info
, h
))
2461 bfd_size_type pc_count
= 0, count
= 0;
2462 struct elf_dyn_relocs
**pp
;
2464 eh
= (struct elf_x86_link_hash_entry
*) h
;
2465 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2467 pc_count
+= p
->pc_count
;
2468 p
->count
-= p
->pc_count
;
2477 if (pc_count
|| count
)
2482 /* Increment PLT reference count only for PC-relative
2485 if (h
->plt
.refcount
<= 0)
2486 h
->plt
.refcount
= 1;
2488 h
->plt
.refcount
+= 1;
2493 if (h
->plt
.refcount
<= 0)
2495 h
->plt
.offset
= (bfd_vma
) -1;
2501 /* If this is a function, put it in the procedure linkage table. We
2502 will fill in the contents of the procedure linkage table later,
2503 when we know the address of the .got section. */
2504 if (h
->type
== STT_FUNC
2507 if (h
->plt
.refcount
<= 0
2508 || SYMBOL_CALLS_LOCAL (info
, h
)
2509 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2510 && h
->root
.type
== bfd_link_hash_undefweak
))
2512 /* This case can occur if we saw a PLT32 reloc in an input
2513 file, but the symbol was never referred to by a dynamic
2514 object, or if all references were garbage collected. In
2515 such a case, we don't actually need to build a procedure
2516 linkage table, and we can just do a PC32 reloc instead. */
2517 h
->plt
.offset
= (bfd_vma
) -1;
2524 /* It's possible that we incorrectly decided a .plt reloc was
2525 needed for an R_X86_64_PC32 reloc to a non-function sym in
2526 check_relocs. We can't decide accurately between function and
2527 non-function syms in check-relocs; Objects loaded later in
2528 the link may change h->type. So fix it now. */
2529 h
->plt
.offset
= (bfd_vma
) -1;
2531 eh
= (struct elf_x86_link_hash_entry
*) h
;
2533 /* If this is a weak symbol, and there is a real definition, the
2534 processor independent code will have arranged for us to see the
2535 real definition first, and we can just use the same value. */
2536 if (h
->u
.weakdef
!= NULL
)
2538 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2539 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2540 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2541 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2542 if (ELIMINATE_COPY_RELOCS
2543 || info
->nocopyreloc
2544 || SYMBOL_NO_COPYRELOC (info
, eh
))
2546 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2547 eh
->needs_copy
= h
->u
.weakdef
->needs_copy
;
2552 /* This is a reference to a symbol defined by a dynamic object which
2553 is not a function. */
2555 /* If we are creating a shared library, we must presume that the
2556 only references to the symbol are via the global offset table.
2557 For such cases we need not do anything here; the relocations will
2558 be handled correctly by relocate_section. */
2559 if (!bfd_link_executable (info
))
2562 /* If there are no references to this symbol that do not use the
2563 GOT, we don't need to generate a copy reloc. */
2564 if (!h
->non_got_ref
)
2567 /* If -z nocopyreloc was given, we won't generate them either. */
2568 if (info
->nocopyreloc
|| SYMBOL_NO_COPYRELOC (info
, eh
))
2574 if (ELIMINATE_COPY_RELOCS
)
2576 eh
= (struct elf_x86_link_hash_entry
*) h
;
2577 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2579 s
= p
->sec
->output_section
;
2580 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2584 /* If we didn't find any dynamic relocs in read-only sections, then
2585 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2593 /* We must allocate the symbol in our .dynbss section, which will
2594 become part of the .bss section of the executable. There will be
2595 an entry for this symbol in the .dynsym section. The dynamic
2596 object will contain position independent code, so all references
2597 from the dynamic object to this symbol will go through the global
2598 offset table. The dynamic linker will use the .dynsym entry to
2599 determine the address it must put in the global offset table, so
2600 both the dynamic object and the regular object will refer to the
2601 same memory location for the variable. */
2603 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
2607 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2608 to copy the initial value out of the dynamic object and into the
2609 runtime process image. */
2610 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2612 s
= htab
->elf
.sdynrelro
;
2613 srel
= htab
->elf
.sreldynrelro
;
2617 s
= htab
->elf
.sdynbss
;
2618 srel
= htab
->elf
.srelbss
;
2620 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2622 const struct elf_backend_data
*bed
;
2623 bed
= get_elf_backend_data (info
->output_bfd
);
2624 srel
->size
+= bed
->s
->sizeof_rela
;
2628 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2631 /* Allocate space in .plt, .got and associated reloc sections for
2635 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2637 struct bfd_link_info
*info
;
2638 struct elf_x86_link_hash_table
*htab
;
2639 struct elf_x86_link_hash_entry
*eh
;
2640 struct elf_dyn_relocs
*p
;
2641 const struct elf_backend_data
*bed
;
2642 unsigned int plt_entry_size
;
2643 bfd_boolean resolved_to_zero
;
2645 if (h
->root
.type
== bfd_link_hash_indirect
)
2648 eh
= (struct elf_x86_link_hash_entry
*) h
;
2650 info
= (struct bfd_link_info
*) inf
;
2651 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
2654 bed
= get_elf_backend_data (info
->output_bfd
);
2656 plt_entry_size
= htab
->plt
.plt_entry_size
;
2658 resolved_to_zero
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2663 /* We can't use the GOT PLT if pointer equality is needed since
2664 finish_dynamic_symbol won't clear symbol value and the dynamic
2665 linker won't update the GOT slot. We will get into an infinite
2666 loop at run-time. */
2667 if (htab
->plt_got
!= NULL
2668 && h
->type
!= STT_GNU_IFUNC
2669 && !h
->pointer_equality_needed
2670 && h
->plt
.refcount
> 0
2671 && h
->got
.refcount
> 0)
2673 /* Don't use the regular PLT if there are both GOT and GOTPLT
2675 h
->plt
.offset
= (bfd_vma
) -1;
2677 /* Use the GOT PLT. */
2678 eh
->plt_got
.refcount
= 1;
2681 /* Clear the reference count of function pointer relocations if
2682 symbol isn't a normal function. */
2683 if (h
->type
!= STT_FUNC
)
2684 eh
->func_pointer_refcount
= 0;
2686 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2687 here if it is defined and referenced in a non-shared object. */
2688 if (h
->type
== STT_GNU_IFUNC
2691 if (_bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2693 &htab
->readonly_dynrelocs_against_ifunc
,
2697 GOT_ENTRY_SIZE
, TRUE
))
2699 asection
*s
= htab
->plt_second
;
2700 if (h
->plt
.offset
!= (bfd_vma
) -1 && s
!= NULL
)
2702 /* Use the second PLT section if it is created. */
2703 eh
->plt_second
.offset
= s
->size
;
2705 /* Make room for this entry in the second PLT section. */
2706 s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
2714 /* Don't create the PLT entry if there are only function pointer
2715 relocations which can be resolved at run-time. */
2716 else if (htab
->elf
.dynamic_sections_created
2717 && (h
->plt
.refcount
> eh
->func_pointer_refcount
2718 || eh
->plt_got
.refcount
> 0))
2720 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
2722 /* Clear the reference count of function pointer relocations
2724 eh
->func_pointer_refcount
= 0;
2726 /* Make sure this symbol is output as a dynamic symbol.
2727 Undefined weak syms won't yet be marked as dynamic. */
2728 if (h
->dynindx
== -1
2730 && !resolved_to_zero
2731 && h
->root
.type
== bfd_link_hash_undefweak
)
2733 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2737 if (bfd_link_pic (info
)
2738 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2740 asection
*s
= htab
->elf
.splt
;
2741 asection
*second_s
= htab
->plt_second
;
2742 asection
*got_s
= htab
->plt_got
;
2744 /* If this is the first .plt entry, make room for the special
2745 first entry. The .plt section is used by prelink to undo
2746 prelinking for dynamic relocations. */
2748 s
->size
= htab
->plt
.has_plt0
* plt_entry_size
;
2751 eh
->plt_got
.offset
= got_s
->size
;
2754 h
->plt
.offset
= s
->size
;
2756 eh
->plt_second
.offset
= second_s
->size
;
2759 /* If this symbol is not defined in a regular file, and we are
2760 not generating a shared library, then set the symbol to this
2761 location in the .plt. This is required to make function
2762 pointers compare as equal between the normal executable and
2763 the shared library. */
2764 if (! bfd_link_pic (info
)
2769 /* We need to make a call to the entry of the GOT PLT
2770 instead of regular PLT entry. */
2771 h
->root
.u
.def
.section
= got_s
;
2772 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2778 /* We need to make a call to the entry of the
2779 second PLT instead of regular PLT entry. */
2780 h
->root
.u
.def
.section
= second_s
;
2781 h
->root
.u
.def
.value
= eh
->plt_second
.offset
;
2785 h
->root
.u
.def
.section
= s
;
2786 h
->root
.u
.def
.value
= h
->plt
.offset
;
2791 /* Make room for this entry. */
2793 got_s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
2796 s
->size
+= plt_entry_size
;
2798 second_s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
2800 /* We also need to make an entry in the .got.plt section,
2801 which will be placed in the .got section by the linker
2803 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2805 /* There should be no PLT relocation against resolved
2806 undefined weak symbol in executable. */
2807 if (!resolved_to_zero
)
2809 /* We also need to make an entry in the .rela.plt
2811 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2812 htab
->elf
.srelplt
->reloc_count
++;
2818 eh
->plt_got
.offset
= (bfd_vma
) -1;
2819 h
->plt
.offset
= (bfd_vma
) -1;
2825 eh
->plt_got
.offset
= (bfd_vma
) -1;
2826 h
->plt
.offset
= (bfd_vma
) -1;
2830 eh
->tlsdesc_got
= (bfd_vma
) -1;
2832 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2833 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2834 if (h
->got
.refcount
> 0
2835 && bfd_link_executable (info
)
2837 && elf_x86_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2839 h
->got
.offset
= (bfd_vma
) -1;
2841 else if (h
->got
.refcount
> 0)
2845 int tls_type
= elf_x86_hash_entry (h
)->tls_type
;
2847 /* Make sure this symbol is output as a dynamic symbol.
2848 Undefined weak syms won't yet be marked as dynamic. */
2849 if (h
->dynindx
== -1
2851 && !resolved_to_zero
2852 && h
->root
.type
== bfd_link_hash_undefweak
)
2854 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2858 if (GOT_TLS_GDESC_P (tls_type
))
2860 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2861 - elf_x86_64_compute_jump_table_size (htab
);
2862 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2863 h
->got
.offset
= (bfd_vma
) -2;
2865 if (! GOT_TLS_GDESC_P (tls_type
)
2866 || GOT_TLS_GD_P (tls_type
))
2869 h
->got
.offset
= s
->size
;
2870 s
->size
+= GOT_ENTRY_SIZE
;
2871 if (GOT_TLS_GD_P (tls_type
))
2872 s
->size
+= GOT_ENTRY_SIZE
;
2874 dyn
= htab
->elf
.dynamic_sections_created
;
2875 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2876 and two if global. R_X86_64_GOTTPOFF needs one dynamic
2877 relocation. No dynamic relocation against resolved undefined
2878 weak symbol in executable. */
2879 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2880 || tls_type
== GOT_TLS_IE
)
2881 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2882 else if (GOT_TLS_GD_P (tls_type
))
2883 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2884 else if (! GOT_TLS_GDESC_P (tls_type
)
2885 && ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2886 && !resolved_to_zero
)
2887 || h
->root
.type
!= bfd_link_hash_undefweak
)
2888 && (bfd_link_pic (info
)
2889 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2890 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2891 if (GOT_TLS_GDESC_P (tls_type
))
2893 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2894 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2898 h
->got
.offset
= (bfd_vma
) -1;
2900 if (eh
->dyn_relocs
== NULL
)
2903 /* In the shared -Bsymbolic case, discard space allocated for
2904 dynamic pc-relative relocs against symbols which turn out to be
2905 defined in regular objects. For the normal shared case, discard
2906 space for pc-relative relocs that have become local due to symbol
2907 visibility changes. */
2909 if (bfd_link_pic (info
))
2911 /* Relocs that use pc_count are those that appear on a call
2912 insn, or certain REL relocs that can generated via assembly.
2913 We want calls to protected symbols to resolve directly to the
2914 function rather than going via the plt. If people want
2915 function pointer comparisons to work as expected then they
2916 should avoid writing weird assembly. */
2917 if (SYMBOL_CALLS_LOCAL (info
, h
))
2919 struct elf_dyn_relocs
**pp
;
2921 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2923 p
->count
-= p
->pc_count
;
2932 /* Also discard relocs on undefined weak syms with non-default
2933 visibility or in PIE. */
2934 if (eh
->dyn_relocs
!= NULL
)
2936 if (h
->root
.type
== bfd_link_hash_undefweak
)
2938 /* Undefined weak symbol is never bound locally in shared
2940 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2941 || resolved_to_zero
)
2942 eh
->dyn_relocs
= NULL
;
2943 else if (h
->dynindx
== -1
2944 && ! h
->forced_local
2945 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2948 /* For PIE, discard space for pc-relative relocs against
2949 symbols which turn out to need copy relocs. */
2950 else if (bfd_link_executable (info
)
2951 && (h
->needs_copy
|| eh
->needs_copy
)
2955 struct elf_dyn_relocs
**pp
;
2957 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2959 if (p
->pc_count
!= 0)
2967 else if (ELIMINATE_COPY_RELOCS
)
2969 /* For the non-shared case, discard space for relocs against
2970 symbols which turn out to need copy relocs or are not
2971 dynamic. Keep dynamic relocations for run-time function
2972 pointer initialization. */
2974 if ((!h
->non_got_ref
2975 || eh
->func_pointer_refcount
> 0
2976 || (h
->root
.type
== bfd_link_hash_undefweak
2977 && !resolved_to_zero
))
2980 || (htab
->elf
.dynamic_sections_created
2981 && (h
->root
.type
== bfd_link_hash_undefweak
2982 || h
->root
.type
== bfd_link_hash_undefined
))))
2984 /* Make sure this symbol is output as a dynamic symbol.
2985 Undefined weak syms won't yet be marked as dynamic. */
2986 if (h
->dynindx
== -1
2987 && ! h
->forced_local
2988 && ! resolved_to_zero
2989 && h
->root
.type
== bfd_link_hash_undefweak
2990 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2993 /* If that succeeded, we know we'll be keeping all the
2995 if (h
->dynindx
!= -1)
2999 eh
->dyn_relocs
= NULL
;
3000 eh
->func_pointer_refcount
= 0;
3005 /* Finally, allocate space. */
3006 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3010 sreloc
= elf_section_data (p
->sec
)->sreloc
;
3012 BFD_ASSERT (sreloc
!= NULL
);
3014 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3020 /* Allocate space in .plt, .got and associated reloc sections for
3021 local dynamic relocs. */
3024 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
3026 struct elf_link_hash_entry
*h
3027 = (struct elf_link_hash_entry
*) *slot
;
3029 if (h
->type
!= STT_GNU_IFUNC
3033 || h
->root
.type
!= bfd_link_hash_defined
)
3036 return elf_x86_64_allocate_dynrelocs (h
, inf
);
3039 /* Convert load via the GOT slot to load immediate. */
3042 elf_x86_64_convert_load (bfd
*abfd
, asection
*sec
,
3043 struct bfd_link_info
*link_info
)
3045 Elf_Internal_Shdr
*symtab_hdr
;
3046 Elf_Internal_Rela
*internal_relocs
;
3047 Elf_Internal_Rela
*irel
, *irelend
;
3049 struct elf_x86_link_hash_table
*htab
;
3050 bfd_boolean changed
;
3051 bfd_signed_vma
*local_got_refcounts
;
3053 /* Don't even try to convert non-ELF outputs. */
3054 if (!is_elf_hash_table (link_info
->hash
))
3057 /* Nothing to do if there is no need or no output. */
3058 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
3059 || sec
->need_convert_load
== 0
3060 || bfd_is_abs_section (sec
->output_section
))
3063 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3065 /* Load the relocations for this section. */
3066 internal_relocs
= (_bfd_elf_link_read_relocs
3067 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3068 link_info
->keep_memory
));
3069 if (internal_relocs
== NULL
)
3073 htab
= elf_x86_hash_table (link_info
, X86_64_ELF_DATA
);
3074 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3076 /* Get the section contents. */
3077 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3078 contents
= elf_section_data (sec
)->this_hdr
.contents
;
3081 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
3085 irelend
= internal_relocs
+ sec
->reloc_count
;
3086 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3088 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
3089 unsigned int r_symndx
;
3090 struct elf_link_hash_entry
*h
;
3091 bfd_boolean converted
;
3093 if (r_type
!= R_X86_64_GOTPCRELX
3094 && r_type
!= R_X86_64_REX_GOTPCRELX
3095 && r_type
!= R_X86_64_GOTPCREL
)
3098 r_symndx
= htab
->r_sym (irel
->r_info
);
3099 if (r_symndx
< symtab_hdr
->sh_info
)
3100 h
= _bfd_elf_x86_get_local_sym_hash (htab
, sec
->owner
,
3101 (const Elf_Internal_Rela
*) irel
,
3105 h
= elf_sym_hashes (abfd
)[r_symndx
- symtab_hdr
->sh_info
];
3106 while (h
->root
.type
== bfd_link_hash_indirect
3107 || h
->root
.type
== bfd_link_hash_warning
)
3108 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3111 /* STT_GNU_IFUNC must keep GOTPCREL relocations. */
3112 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
3116 if (!elf_x86_64_convert_load_reloc (abfd
, sec
, contents
, irel
, h
,
3117 &converted
, link_info
))
3122 changed
= converted
;
3125 if (h
->got
.refcount
> 0)
3126 h
->got
.refcount
-= 1;
3130 if (local_got_refcounts
!= NULL
3131 && local_got_refcounts
[r_symndx
] > 0)
3132 local_got_refcounts
[r_symndx
] -= 1;
3137 if (contents
!= NULL
3138 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3140 if (!changed
&& !link_info
->keep_memory
)
3144 /* Cache the section contents for elf_link_input_bfd. */
3145 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3149 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3152 free (internal_relocs
);
3154 elf_section_data (sec
)->relocs
= internal_relocs
;
3160 if (contents
!= NULL
3161 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3163 if (internal_relocs
!= NULL
3164 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3165 free (internal_relocs
);
3169 /* Set the sizes of the dynamic sections. */
3172 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
3173 struct bfd_link_info
*info
)
3175 struct elf_x86_link_hash_table
*htab
;
3180 const struct elf_backend_data
*bed
;
3182 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
3185 bed
= get_elf_backend_data (output_bfd
);
3187 dynobj
= htab
->elf
.dynobj
;
3191 /* Set up .got offsets for local syms, and space for local dynamic
3193 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3195 bfd_signed_vma
*local_got
;
3196 bfd_signed_vma
*end_local_got
;
3197 char *local_tls_type
;
3198 bfd_vma
*local_tlsdesc_gotent
;
3199 bfd_size_type locsymcount
;
3200 Elf_Internal_Shdr
*symtab_hdr
;
3203 if (! is_x86_64_elf (ibfd
))
3206 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3208 struct elf_dyn_relocs
*p
;
3210 if (!elf_x86_64_convert_load (ibfd
, s
, info
))
3213 for (p
= (struct elf_dyn_relocs
*)
3214 (elf_section_data (s
)->local_dynrel
);
3218 if (!bfd_is_abs_section (p
->sec
)
3219 && bfd_is_abs_section (p
->sec
->output_section
))
3221 /* Input section has been discarded, either because
3222 it is a copy of a linkonce section or due to
3223 linker script /DISCARD/, so we'll be discarding
3226 else if (p
->count
!= 0)
3228 srel
= elf_section_data (p
->sec
)->sreloc
;
3229 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3230 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3231 && (info
->flags
& DF_TEXTREL
) == 0)
3233 info
->flags
|= DF_TEXTREL
;
3234 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3235 || info
->error_textrel
)
3236 /* xgettext:c-format */
3237 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3238 p
->sec
->owner
, p
->sec
);
3244 local_got
= elf_local_got_refcounts (ibfd
);
3248 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3249 locsymcount
= symtab_hdr
->sh_info
;
3250 end_local_got
= local_got
+ locsymcount
;
3251 local_tls_type
= elf_x86_local_got_tls_type (ibfd
);
3252 local_tlsdesc_gotent
= elf_x86_local_tlsdesc_gotent (ibfd
);
3254 srel
= htab
->elf
.srelgot
;
3255 for (; local_got
< end_local_got
;
3256 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3258 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3261 if (GOT_TLS_GDESC_P (*local_tls_type
))
3263 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3264 - elf_x86_64_compute_jump_table_size (htab
);
3265 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3266 *local_got
= (bfd_vma
) -2;
3268 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3269 || GOT_TLS_GD_P (*local_tls_type
))
3271 *local_got
= s
->size
;
3272 s
->size
+= GOT_ENTRY_SIZE
;
3273 if (GOT_TLS_GD_P (*local_tls_type
))
3274 s
->size
+= GOT_ENTRY_SIZE
;
3276 if (bfd_link_pic (info
)
3277 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3278 || *local_tls_type
== GOT_TLS_IE
)
3280 if (GOT_TLS_GDESC_P (*local_tls_type
))
3282 htab
->elf
.srelplt
->size
3283 += bed
->s
->sizeof_rela
;
3284 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3286 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3287 || GOT_TLS_GD_P (*local_tls_type
))
3288 srel
->size
+= bed
->s
->sizeof_rela
;
3292 *local_got
= (bfd_vma
) -1;
3296 if (htab
->tls_ld_or_ldm_got
.refcount
> 0)
3298 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3300 htab
->tls_ld_or_ldm_got
.offset
= htab
->elf
.sgot
->size
;
3301 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
3302 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3305 htab
->tls_ld_or_ldm_got
.offset
= -1;
3307 /* Allocate global sym .plt and .got entries, and space for global
3308 sym dynamic relocs. */
3309 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
3312 /* Allocate .plt and .got entries, and space for local symbols. */
3313 htab_traverse (htab
->loc_hash_table
,
3314 elf_x86_64_allocate_local_dynrelocs
,
3317 /* For every jump slot reserved in the sgotplt, reloc_count is
3318 incremented. However, when we reserve space for TLS descriptors,
3319 it's not incremented, so in order to compute the space reserved
3320 for them, it suffices to multiply the reloc count by the jump
3323 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3324 so that R_X86_64_IRELATIVE entries come last. */
3325 if (htab
->elf
.srelplt
)
3327 htab
->sgotplt_jump_table_size
3328 = elf_x86_64_compute_jump_table_size (htab
);
3329 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3331 else if (htab
->elf
.irelplt
)
3332 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3334 if (htab
->tlsdesc_plt
)
3336 /* If we're not using lazy TLS relocations, don't generate the
3337 PLT and GOT entries they require. */
3338 if ((info
->flags
& DF_BIND_NOW
))
3339 htab
->tlsdesc_plt
= 0;
3342 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
3343 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
3344 /* Reserve room for the initial entry.
3345 FIXME: we could probably do away with it in this case. */
3346 if (htab
->elf
.splt
->size
== 0)
3347 htab
->elf
.splt
->size
= htab
->plt
.plt_entry_size
;
3348 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
3349 htab
->elf
.splt
->size
+= htab
->plt
.plt_entry_size
;
3353 if (htab
->elf
.sgotplt
)
3355 /* Don't allocate .got.plt section if there are no GOT nor PLT
3356 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3357 if ((htab
->elf
.hgot
== NULL
3358 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3359 && (htab
->elf
.sgotplt
->size
3360 == get_elf_backend_data (output_bfd
)->got_header_size
)
3361 && (htab
->elf
.splt
== NULL
3362 || htab
->elf
.splt
->size
== 0)
3363 && (htab
->elf
.sgot
== NULL
3364 || htab
->elf
.sgot
->size
== 0)
3365 && (htab
->elf
.iplt
== NULL
3366 || htab
->elf
.iplt
->size
== 0)
3367 && (htab
->elf
.igotplt
== NULL
3368 || htab
->elf
.igotplt
->size
== 0))
3369 htab
->elf
.sgotplt
->size
= 0;
3372 if (_bfd_elf_eh_frame_present (info
))
3374 if (htab
->plt_eh_frame
!= NULL
3375 && htab
->elf
.splt
!= NULL
3376 && htab
->elf
.splt
->size
!= 0
3377 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
))
3378 htab
->plt_eh_frame
->size
= htab
->plt
.eh_frame_plt_size
;
3380 if (htab
->plt_got_eh_frame
!= NULL
3381 && htab
->plt_got
!= NULL
3382 && htab
->plt_got
->size
!= 0
3383 && !bfd_is_abs_section (htab
->plt_got
->output_section
))
3384 htab
->plt_got_eh_frame
->size
3385 = htab
->non_lazy_plt
->eh_frame_plt_size
;
3387 /* Unwind info for the second PLT and .plt.got sections are
3389 if (htab
->plt_second_eh_frame
!= NULL
3390 && htab
->plt_second
!= NULL
3391 && htab
->plt_second
->size
!= 0
3392 && !bfd_is_abs_section (htab
->plt_second
->output_section
))
3393 htab
->plt_second_eh_frame
->size
3394 = htab
->non_lazy_plt
->eh_frame_plt_size
;
3397 /* We now have determined the sizes of the various dynamic sections.
3398 Allocate memory for them. */
3400 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3402 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3405 if (s
== htab
->elf
.splt
3406 || s
== htab
->elf
.sgot
3407 || s
== htab
->elf
.sgotplt
3408 || s
== htab
->elf
.iplt
3409 || s
== htab
->elf
.igotplt
3410 || s
== htab
->plt_second
3411 || s
== htab
->plt_got
3412 || s
== htab
->plt_eh_frame
3413 || s
== htab
->plt_got_eh_frame
3414 || s
== htab
->plt_second_eh_frame
3415 || s
== htab
->elf
.sdynbss
3416 || s
== htab
->elf
.sdynrelro
)
3418 /* Strip this section if we don't need it; see the
3421 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
3423 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3426 /* We use the reloc_count field as a counter if we need
3427 to copy relocs into the output file. */
3428 if (s
!= htab
->elf
.srelplt
)
3433 /* It's not one of our sections, so don't allocate space. */
3439 /* If we don't need this section, strip it from the
3440 output file. This is mostly to handle .rela.bss and
3441 .rela.plt. We must create both sections in
3442 create_dynamic_sections, because they must be created
3443 before the linker maps input sections to output
3444 sections. The linker does that before
3445 adjust_dynamic_symbol is called, and it is that
3446 function which decides whether anything needs to go
3447 into these sections. */
3449 s
->flags
|= SEC_EXCLUDE
;
3453 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3456 /* Allocate memory for the section contents. We use bfd_zalloc
3457 here in case unused entries are not reclaimed before the
3458 section's contents are written out. This should not happen,
3459 but this way if it does, we get a R_X86_64_NONE reloc instead
3461 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3462 if (s
->contents
== NULL
)
3466 if (htab
->plt_eh_frame
!= NULL
3467 && htab
->plt_eh_frame
->contents
!= NULL
)
3469 memcpy (htab
->plt_eh_frame
->contents
,
3470 htab
->plt
.eh_frame_plt
, htab
->plt_eh_frame
->size
);
3471 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3472 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3475 if (htab
->plt_got_eh_frame
!= NULL
3476 && htab
->plt_got_eh_frame
->contents
!= NULL
)
3478 memcpy (htab
->plt_got_eh_frame
->contents
,
3479 htab
->non_lazy_plt
->eh_frame_plt
,
3480 htab
->plt_got_eh_frame
->size
);
3481 bfd_put_32 (dynobj
, htab
->plt_got
->size
,
3482 (htab
->plt_got_eh_frame
->contents
3483 + PLT_FDE_LEN_OFFSET
));
3486 if (htab
->plt_second_eh_frame
!= NULL
3487 && htab
->plt_second_eh_frame
->contents
!= NULL
)
3489 memcpy (htab
->plt_second_eh_frame
->contents
,
3490 htab
->non_lazy_plt
->eh_frame_plt
,
3491 htab
->plt_second_eh_frame
->size
);
3492 bfd_put_32 (dynobj
, htab
->plt_second
->size
,
3493 (htab
->plt_second_eh_frame
->contents
3494 + PLT_FDE_LEN_OFFSET
));
3497 if (htab
->elf
.dynamic_sections_created
)
3499 /* Add some entries to the .dynamic section. We fill in the
3500 values later, in elf_x86_64_finish_dynamic_sections, but we
3501 must add the entries now so that we get the correct size for
3502 the .dynamic section. The DT_DEBUG entry is filled in by the
3503 dynamic linker and used by the debugger. */
3504 #define add_dynamic_entry(TAG, VAL) \
3505 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3507 if (bfd_link_executable (info
))
3509 if (!add_dynamic_entry (DT_DEBUG
, 0))
3513 if (htab
->elf
.splt
->size
!= 0)
3515 /* DT_PLTGOT is used by prelink even if there is no PLT
3517 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3521 if (htab
->elf
.srelplt
->size
!= 0)
3523 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3524 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3525 || !add_dynamic_entry (DT_JMPREL
, 0))
3529 if (htab
->tlsdesc_plt
3530 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3531 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3536 if (!add_dynamic_entry (DT_RELA
, 0)
3537 || !add_dynamic_entry (DT_RELASZ
, 0)
3538 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3541 /* If any dynamic relocs apply to a read-only section,
3542 then we need a DT_TEXTREL entry. */
3543 if ((info
->flags
& DF_TEXTREL
) == 0)
3544 elf_link_hash_traverse (&htab
->elf
,
3545 _bfd_x86_elf_readonly_dynrelocs
,
3548 if ((info
->flags
& DF_TEXTREL
) != 0)
3550 if (htab
->readonly_dynrelocs_against_ifunc
)
3552 info
->callbacks
->einfo
3553 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3554 bfd_set_error (bfd_error_bad_value
);
3558 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3563 #undef add_dynamic_entry
3568 /* Return the relocation value for @tpoff relocation
3569 if STT_TLS virtual address is ADDRESS. */
3572 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3574 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3575 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3576 bfd_vma static_tls_size
;
3578 /* If tls_segment is NULL, we should have signalled an error already. */
3579 if (htab
->tls_sec
== NULL
)
3582 /* Consider special static TLS alignment requirements. */
3583 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3584 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3587 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3591 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3593 /* Opcode Instruction
3596 0x0f 0x8x conditional jump */
3598 && (contents
[offset
- 1] == 0xe8
3599 || contents
[offset
- 1] == 0xe9))
3601 && contents
[offset
- 2] == 0x0f
3602 && (contents
[offset
- 1] & 0xf0) == 0x80));
3605 /* Relocate an x86_64 ELF section. */
3608 elf_x86_64_relocate_section (bfd
*output_bfd
,
3609 struct bfd_link_info
*info
,
3611 asection
*input_section
,
3613 Elf_Internal_Rela
*relocs
,
3614 Elf_Internal_Sym
*local_syms
,
3615 asection
**local_sections
)
3617 struct elf_x86_link_hash_table
*htab
;
3618 Elf_Internal_Shdr
*symtab_hdr
;
3619 struct elf_link_hash_entry
**sym_hashes
;
3620 bfd_vma
*local_got_offsets
;
3621 bfd_vma
*local_tlsdesc_gotents
;
3622 Elf_Internal_Rela
*rel
;
3623 Elf_Internal_Rela
*wrel
;
3624 Elf_Internal_Rela
*relend
;
3625 unsigned int plt_entry_size
;
3627 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3629 /* Skip if check_relocs failed. */
3630 if (input_section
->check_relocs_failed
)
3633 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
3636 plt_entry_size
= htab
->plt
.plt_entry_size
;
3637 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3638 sym_hashes
= elf_sym_hashes (input_bfd
);
3639 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3640 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
3642 _bfd_x86_elf_set_tls_module_base (info
);
3644 rel
= wrel
= relocs
;
3645 relend
= relocs
+ input_section
->reloc_count
;
3646 for (; rel
< relend
; wrel
++, rel
++)
3648 unsigned int r_type
;
3649 reloc_howto_type
*howto
;
3650 unsigned long r_symndx
;
3651 struct elf_link_hash_entry
*h
;
3652 struct elf_x86_link_hash_entry
*eh
;
3653 Elf_Internal_Sym
*sym
;
3655 bfd_vma off
, offplt
, plt_offset
;
3657 bfd_boolean unresolved_reloc
;
3658 bfd_reloc_status_type r
;
3660 asection
*base_got
, *resolved_plt
;
3662 bfd_boolean resolved_to_zero
;
3663 bfd_boolean relative_reloc
;
3665 r_type
= ELF32_R_TYPE (rel
->r_info
);
3666 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3667 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3674 if (r_type
>= (int) R_X86_64_standard
)
3675 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
3677 if (r_type
!= (int) R_X86_64_32
3678 || ABI_64_P (output_bfd
))
3679 howto
= x86_64_elf_howto_table
+ r_type
;
3681 howto
= (x86_64_elf_howto_table
3682 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3683 r_symndx
= htab
->r_sym (rel
->r_info
);
3687 unresolved_reloc
= FALSE
;
3688 if (r_symndx
< symtab_hdr
->sh_info
)
3690 sym
= local_syms
+ r_symndx
;
3691 sec
= local_sections
[r_symndx
];
3693 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3695 st_size
= sym
->st_size
;
3697 /* Relocate against local STT_GNU_IFUNC symbol. */
3698 if (!bfd_link_relocatable (info
)
3699 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3701 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
,
3706 /* Set STT_GNU_IFUNC symbol value. */
3707 h
->root
.u
.def
.value
= sym
->st_value
;
3708 h
->root
.u
.def
.section
= sec
;
3713 bfd_boolean warned ATTRIBUTE_UNUSED
;
3714 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3716 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3717 r_symndx
, symtab_hdr
, sym_hashes
,
3719 unresolved_reloc
, warned
, ignored
);
3723 if (sec
!= NULL
&& discarded_section (sec
))
3725 _bfd_clear_contents (howto
, input_bfd
, input_section
,
3726 contents
+ rel
->r_offset
);
3727 wrel
->r_offset
= rel
->r_offset
;
3731 /* For ld -r, remove relocations in debug sections against
3732 sections defined in discarded sections. Not done for
3733 eh_frame editing code expects to be present. */
3734 if (bfd_link_relocatable (info
)
3735 && (input_section
->flags
& SEC_DEBUGGING
))
3741 if (bfd_link_relocatable (info
))
3748 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3750 if (r_type
== R_X86_64_64
)
3752 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3753 zero-extend it to 64bit if addend is zero. */
3754 r_type
= R_X86_64_32
;
3755 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3757 else if (r_type
== R_X86_64_SIZE64
)
3759 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3760 zero-extend it to 64bit if addend is zero. */
3761 r_type
= R_X86_64_SIZE32
;
3762 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3766 eh
= (struct elf_x86_link_hash_entry
*) h
;
3768 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3769 it here if it is defined in a non-shared object. */
3771 && h
->type
== STT_GNU_IFUNC
3777 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3779 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3780 sections because such sections are not SEC_ALLOC and
3781 thus ld.so will not process them. */
3782 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
3792 case R_X86_64_GOTPCREL
:
3793 case R_X86_64_GOTPCRELX
:
3794 case R_X86_64_REX_GOTPCRELX
:
3795 case R_X86_64_GOTPCREL64
:
3796 base_got
= htab
->elf
.sgot
;
3797 off
= h
->got
.offset
;
3799 if (base_got
== NULL
)
3802 if (off
== (bfd_vma
) -1)
3804 /* We can't use h->got.offset here to save state, or
3805 even just remember the offset, as finish_dynamic_symbol
3806 would use that as offset into .got. */
3808 if (h
->plt
.offset
== (bfd_vma
) -1)
3811 if (htab
->elf
.splt
!= NULL
)
3813 plt_index
= (h
->plt
.offset
/ plt_entry_size
3814 - htab
->plt
.has_plt0
);
3815 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3816 base_got
= htab
->elf
.sgotplt
;
3820 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3821 off
= plt_index
* GOT_ENTRY_SIZE
;
3822 base_got
= htab
->elf
.igotplt
;
3825 if (h
->dynindx
== -1
3829 /* This references the local defitionion. We must
3830 initialize this entry in the global offset table.
3831 Since the offset must always be a multiple of 8,
3832 we use the least significant bit to record
3833 whether we have initialized it already.
3835 When doing a dynamic link, we create a .rela.got
3836 relocation entry to initialize the value. This
3837 is done in the finish_dynamic_symbol routine. */
3842 bfd_put_64 (output_bfd
, relocation
,
3843 base_got
->contents
+ off
);
3844 /* Note that this is harmless for the GOTPLT64
3845 case, as -1 | 1 still is -1. */
3851 relocation
= (base_got
->output_section
->vma
3852 + base_got
->output_offset
+ off
);
3857 if (h
->plt
.offset
== (bfd_vma
) -1)
3859 /* Handle static pointers of STT_GNU_IFUNC symbols. */
3860 if (r_type
== htab
->pointer_r_type
3861 && (input_section
->flags
& SEC_CODE
) == 0)
3862 goto do_ifunc_pointer
;
3863 goto bad_ifunc_reloc
;
3866 /* STT_GNU_IFUNC symbol must go through PLT. */
3867 if (htab
->elf
.splt
!= NULL
)
3869 if (htab
->plt_second
!= NULL
)
3871 resolved_plt
= htab
->plt_second
;
3872 plt_offset
= eh
->plt_second
.offset
;
3876 resolved_plt
= htab
->elf
.splt
;
3877 plt_offset
= h
->plt
.offset
;
3882 resolved_plt
= htab
->elf
.iplt
;
3883 plt_offset
= h
->plt
.offset
;
3886 relocation
= (resolved_plt
->output_section
->vma
3887 + resolved_plt
->output_offset
+ plt_offset
);
3893 if (h
->root
.root
.string
)
3894 name
= h
->root
.root
.string
;
3896 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3899 /* xgettext:c-format */
3900 (_("%B: relocation %s against STT_GNU_IFUNC "
3901 "symbol `%s' isn't supported"), input_bfd
,
3903 bfd_set_error (bfd_error_bad_value
);
3907 if (bfd_link_pic (info
))
3912 if (ABI_64_P (output_bfd
))
3917 if (rel
->r_addend
!= 0)
3919 if (h
->root
.root
.string
)
3920 name
= h
->root
.root
.string
;
3922 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3925 /* xgettext:c-format */
3926 (_("%B: relocation %s against STT_GNU_IFUNC "
3927 "symbol `%s' has non-zero addend: %Ld"),
3928 input_bfd
, howto
->name
, name
, rel
->r_addend
);
3929 bfd_set_error (bfd_error_bad_value
);
3933 /* Generate dynamic relcoation only when there is a
3934 non-GOT reference in a shared object or there is no
3936 if ((bfd_link_pic (info
) && h
->non_got_ref
)
3937 || h
->plt
.offset
== (bfd_vma
) -1)
3939 Elf_Internal_Rela outrel
;
3942 /* Need a dynamic relocation to get the real function
3944 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3948 if (outrel
.r_offset
== (bfd_vma
) -1
3949 || outrel
.r_offset
== (bfd_vma
) -2)
3952 outrel
.r_offset
+= (input_section
->output_section
->vma
3953 + input_section
->output_offset
);
3955 if (h
->dynindx
== -1
3957 || bfd_link_executable (info
))
3959 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
3960 h
->root
.root
.string
,
3961 h
->root
.u
.def
.section
->owner
);
3963 /* This symbol is resolved locally. */
3964 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3965 outrel
.r_addend
= (h
->root
.u
.def
.value
3966 + h
->root
.u
.def
.section
->output_section
->vma
3967 + h
->root
.u
.def
.section
->output_offset
);
3971 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3972 outrel
.r_addend
= 0;
3975 /* Dynamic relocations are stored in
3976 1. .rela.ifunc section in PIC object.
3977 2. .rela.got section in dynamic executable.
3978 3. .rela.iplt section in static executable. */
3979 if (bfd_link_pic (info
))
3980 sreloc
= htab
->elf
.irelifunc
;
3981 else if (htab
->elf
.splt
!= NULL
)
3982 sreloc
= htab
->elf
.srelgot
;
3984 sreloc
= htab
->elf
.irelplt
;
3985 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3987 /* If this reloc is against an external symbol, we
3988 do not want to fiddle with the addend. Otherwise,
3989 we need to include the symbol value so that it
3990 becomes an addend for the dynamic reloc. For an
3991 internal symbol, we have updated addend. */
3996 case R_X86_64_PC32_BND
:
3998 case R_X86_64_PLT32
:
3999 case R_X86_64_PLT32_BND
:
4004 resolved_to_zero
= (eh
!= NULL
4005 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
4010 /* When generating a shared object, the relocations handled here are
4011 copied into the output file to be resolved at run time. */
4014 case R_X86_64_GOT32
:
4015 case R_X86_64_GOT64
:
4016 /* Relocation is to the entry for this symbol in the global
4018 case R_X86_64_GOTPCREL
:
4019 case R_X86_64_GOTPCRELX
:
4020 case R_X86_64_REX_GOTPCRELX
:
4021 case R_X86_64_GOTPCREL64
:
4022 /* Use global offset table entry as symbol value. */
4023 case R_X86_64_GOTPLT64
:
4024 /* This is obsolete and treated the same as GOT64. */
4025 base_got
= htab
->elf
.sgot
;
4027 if (htab
->elf
.sgot
== NULL
)
4030 relative_reloc
= FALSE
;
4035 off
= h
->got
.offset
;
4037 && h
->plt
.offset
!= (bfd_vma
)-1
4038 && off
== (bfd_vma
)-1)
4040 /* We can't use h->got.offset here to save
4041 state, or even just remember the offset, as
4042 finish_dynamic_symbol would use that as offset into
4044 bfd_vma plt_index
= (h
->plt
.offset
/ plt_entry_size
4045 - htab
->plt
.has_plt0
);
4046 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
4047 base_got
= htab
->elf
.sgotplt
;
4050 dyn
= htab
->elf
.dynamic_sections_created
;
4052 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, bfd_link_pic (info
), h
)
4053 || (bfd_link_pic (info
)
4054 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4055 || (ELF_ST_VISIBILITY (h
->other
)
4056 && h
->root
.type
== bfd_link_hash_undefweak
))
4058 /* This is actually a static link, or it is a -Bsymbolic
4059 link and the symbol is defined locally, or the symbol
4060 was forced to be local because of a version file. We
4061 must initialize this entry in the global offset table.
4062 Since the offset must always be a multiple of 8, we
4063 use the least significant bit to record whether we
4064 have initialized it already.
4066 When doing a dynamic link, we create a .rela.got
4067 relocation entry to initialize the value. This is
4068 done in the finish_dynamic_symbol routine. */
4073 bfd_put_64 (output_bfd
, relocation
,
4074 base_got
->contents
+ off
);
4075 /* Note that this is harmless for the GOTPLT64 case,
4076 as -1 | 1 still is -1. */
4079 if (h
->dynindx
== -1
4081 && h
->root
.type
!= bfd_link_hash_undefweak
4082 && bfd_link_pic (info
))
4084 /* If this symbol isn't dynamic in PIC,
4085 generate R_X86_64_RELATIVE here. */
4086 eh
->no_finish_dynamic_symbol
= 1;
4087 relative_reloc
= TRUE
;
4092 unresolved_reloc
= FALSE
;
4096 if (local_got_offsets
== NULL
)
4099 off
= local_got_offsets
[r_symndx
];
4101 /* The offset must always be a multiple of 8. We use
4102 the least significant bit to record whether we have
4103 already generated the necessary reloc. */
4108 bfd_put_64 (output_bfd
, relocation
,
4109 base_got
->contents
+ off
);
4110 local_got_offsets
[r_symndx
] |= 1;
4112 if (bfd_link_pic (info
))
4113 relative_reloc
= TRUE
;
4120 Elf_Internal_Rela outrel
;
4122 /* We need to generate a R_X86_64_RELATIVE reloc
4123 for the dynamic linker. */
4124 s
= htab
->elf
.srelgot
;
4128 outrel
.r_offset
= (base_got
->output_section
->vma
4129 + base_got
->output_offset
4131 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4132 outrel
.r_addend
= relocation
;
4133 elf_append_rela (output_bfd
, s
, &outrel
);
4136 if (off
>= (bfd_vma
) -2)
4139 relocation
= base_got
->output_section
->vma
4140 + base_got
->output_offset
+ off
;
4141 if (r_type
!= R_X86_64_GOTPCREL
4142 && r_type
!= R_X86_64_GOTPCRELX
4143 && r_type
!= R_X86_64_REX_GOTPCRELX
4144 && r_type
!= R_X86_64_GOTPCREL64
)
4145 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4146 - htab
->elf
.sgotplt
->output_offset
;
4150 case R_X86_64_GOTOFF64
:
4151 /* Relocation is relative to the start of the global offset
4154 /* Check to make sure it isn't a protected function or data
4155 symbol for shared library since it may not be local when
4156 used as function address or with copy relocation. We also
4157 need to make sure that a symbol is referenced locally. */
4158 if (bfd_link_pic (info
) && h
)
4160 if (!h
->def_regular
)
4164 switch (ELF_ST_VISIBILITY (h
->other
))
4167 v
= _("hidden symbol");
4170 v
= _("internal symbol");
4173 v
= _("protected symbol");
4181 /* xgettext:c-format */
4182 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
4183 " `%s' can not be used when making a shared object"),
4184 input_bfd
, v
, h
->root
.root
.string
);
4185 bfd_set_error (bfd_error_bad_value
);
4188 else if (!bfd_link_executable (info
)
4189 && !SYMBOL_REFERENCES_LOCAL (info
, h
)
4190 && (h
->type
== STT_FUNC
4191 || h
->type
== STT_OBJECT
)
4192 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4195 /* xgettext:c-format */
4196 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
4197 " `%s' can not be used when making a shared object"),
4199 h
->type
== STT_FUNC
? "function" : "data",
4200 h
->root
.root
.string
);
4201 bfd_set_error (bfd_error_bad_value
);
4206 /* Note that sgot is not involved in this
4207 calculation. We always want the start of .got.plt. If we
4208 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4209 permitted by the ABI, we might have to change this
4211 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4212 + htab
->elf
.sgotplt
->output_offset
;
4215 case R_X86_64_GOTPC32
:
4216 case R_X86_64_GOTPC64
:
4217 /* Use global offset table as symbol value. */
4218 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4219 + htab
->elf
.sgotplt
->output_offset
;
4220 unresolved_reloc
= FALSE
;
4223 case R_X86_64_PLTOFF64
:
4224 /* Relocation is PLT entry relative to GOT. For local
4225 symbols it's the symbol itself relative to GOT. */
4227 /* See PLT32 handling. */
4228 && (h
->plt
.offset
!= (bfd_vma
) -1
4229 || eh
->plt_got
.offset
!= (bfd_vma
) -1)
4230 && htab
->elf
.splt
!= NULL
)
4232 if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4234 /* Use the GOT PLT. */
4235 resolved_plt
= htab
->plt_got
;
4236 plt_offset
= eh
->plt_got
.offset
;
4238 else if (htab
->plt_second
!= NULL
)
4240 resolved_plt
= htab
->plt_second
;
4241 plt_offset
= eh
->plt_second
.offset
;
4245 resolved_plt
= htab
->elf
.splt
;
4246 plt_offset
= h
->plt
.offset
;
4249 relocation
= (resolved_plt
->output_section
->vma
4250 + resolved_plt
->output_offset
4252 unresolved_reloc
= FALSE
;
4255 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4256 + htab
->elf
.sgotplt
->output_offset
;
4259 case R_X86_64_PLT32
:
4260 case R_X86_64_PLT32_BND
:
4261 /* Relocation is to the entry for this symbol in the
4262 procedure linkage table. */
4264 /* Resolve a PLT32 reloc against a local symbol directly,
4265 without using the procedure linkage table. */
4269 if ((h
->plt
.offset
== (bfd_vma
) -1
4270 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4271 || htab
->elf
.splt
== NULL
)
4273 /* We didn't make a PLT entry for this symbol. This
4274 happens when statically linking PIC code, or when
4275 using -Bsymbolic. */
4279 if (h
->plt
.offset
!= (bfd_vma
) -1)
4281 if (htab
->plt_second
!= NULL
)
4283 resolved_plt
= htab
->plt_second
;
4284 plt_offset
= eh
->plt_second
.offset
;
4288 resolved_plt
= htab
->elf
.splt
;
4289 plt_offset
= h
->plt
.offset
;
4294 /* Use the GOT PLT. */
4295 resolved_plt
= htab
->plt_got
;
4296 plt_offset
= eh
->plt_got
.offset
;
4299 relocation
= (resolved_plt
->output_section
->vma
4300 + resolved_plt
->output_offset
4302 unresolved_reloc
= FALSE
;
4305 case R_X86_64_SIZE32
:
4306 case R_X86_64_SIZE64
:
4307 /* Set to symbol size. */
4308 relocation
= st_size
;
4314 case R_X86_64_PC32_BND
:
4315 /* Don't complain about -fPIC if the symbol is undefined when
4316 building executable unless it is unresolved weak symbol or
4317 -z nocopyreloc is used. */
4318 if ((input_section
->flags
& SEC_ALLOC
) != 0
4319 && (input_section
->flags
& SEC_READONLY
) != 0
4321 && ((bfd_link_executable (info
)
4322 && ((h
->root
.type
== bfd_link_hash_undefweak
4323 && !resolved_to_zero
)
4324 || ((info
->nocopyreloc
4325 || (eh
->def_protected
4326 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
4328 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))))
4329 || bfd_link_dll (info
)))
4331 bfd_boolean fail
= FALSE
;
4333 = ((r_type
== R_X86_64_PC32
4334 || r_type
== R_X86_64_PC32_BND
)
4335 && is_32bit_relative_branch (contents
, rel
->r_offset
));
4337 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
4339 /* Symbol is referenced locally. Make sure it is
4340 defined locally or for a branch. */
4341 fail
= (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
))
4344 else if (!(bfd_link_pie (info
)
4345 && (h
->needs_copy
|| eh
->needs_copy
)))
4347 /* Symbol doesn't need copy reloc and isn't referenced
4348 locally. We only allow branch to symbol with
4349 non-default visibility. */
4351 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
4355 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
4356 h
, NULL
, NULL
, howto
);
4365 /* FIXME: The ABI says the linker should make sure the value is
4366 the same when it's zeroextended to 64 bit. */
4369 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4372 /* Don't copy a pc-relative relocation into the output file
4373 if the symbol needs copy reloc or the symbol is undefined
4374 when building executable. Copy dynamic function pointer
4375 relocations. Don't generate dynamic relocations against
4376 resolved undefined weak symbols in PIE. */
4377 if ((bfd_link_pic (info
)
4378 && !(bfd_link_pie (info
)
4382 || h
->root
.type
== bfd_link_hash_undefined
)
4383 && (IS_X86_64_PCREL_TYPE (r_type
)
4384 || r_type
== R_X86_64_SIZE32
4385 || r_type
== R_X86_64_SIZE64
))
4387 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4388 && !resolved_to_zero
)
4389 || h
->root
.type
!= bfd_link_hash_undefweak
))
4390 && ((! IS_X86_64_PCREL_TYPE (r_type
)
4391 && r_type
!= R_X86_64_SIZE32
4392 && r_type
!= R_X86_64_SIZE64
)
4393 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
4394 || (ELIMINATE_COPY_RELOCS
4395 && !bfd_link_pic (info
)
4399 || eh
->func_pointer_refcount
> 0
4400 || (h
->root
.type
== bfd_link_hash_undefweak
4401 && !resolved_to_zero
))
4402 && ((h
->def_dynamic
&& !h
->def_regular
)
4403 /* Undefined weak symbol is bound locally when
4405 || h
->root
.type
== bfd_link_hash_undefined
)))
4407 Elf_Internal_Rela outrel
;
4408 bfd_boolean skip
, relocate
;
4411 /* When generating a shared object, these relocations
4412 are copied into the output file to be resolved at run
4418 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4420 if (outrel
.r_offset
== (bfd_vma
) -1)
4422 else if (outrel
.r_offset
== (bfd_vma
) -2)
4423 skip
= TRUE
, relocate
= TRUE
;
4425 outrel
.r_offset
+= (input_section
->output_section
->vma
4426 + input_section
->output_offset
);
4429 memset (&outrel
, 0, sizeof outrel
);
4431 /* h->dynindx may be -1 if this symbol was marked to
4435 && (IS_X86_64_PCREL_TYPE (r_type
)
4436 || !(bfd_link_executable (info
)
4437 || SYMBOLIC_BIND (info
, h
))
4438 || ! h
->def_regular
))
4440 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
4441 outrel
.r_addend
= rel
->r_addend
;
4445 /* This symbol is local, or marked to become local.
4446 When relocation overflow check is disabled, we
4447 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
4448 if (r_type
== htab
->pointer_r_type
4449 || (r_type
== R_X86_64_32
4450 && info
->no_reloc_overflow_check
))
4453 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4454 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4456 else if (r_type
== R_X86_64_64
4457 && !ABI_64_P (output_bfd
))
4460 outrel
.r_info
= htab
->r_info (0,
4461 R_X86_64_RELATIVE64
);
4462 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4463 /* Check addend overflow. */
4464 if ((outrel
.r_addend
& 0x80000000)
4465 != (rel
->r_addend
& 0x80000000))
4468 int addend
= rel
->r_addend
;
4469 if (h
&& h
->root
.root
.string
)
4470 name
= h
->root
.root
.string
;
4472 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4475 /* xgettext:c-format */
4476 (_("%B: addend %s%#x in relocation %s against "
4477 "symbol `%s' at %#Lx in section `%A' is "
4479 input_bfd
, addend
< 0 ? "-" : "", addend
,
4480 howto
->name
, name
, rel
->r_offset
, input_section
);
4481 bfd_set_error (bfd_error_bad_value
);
4489 if (bfd_is_abs_section (sec
))
4491 else if (sec
== NULL
|| sec
->owner
== NULL
)
4493 bfd_set_error (bfd_error_bad_value
);
4500 /* We are turning this relocation into one
4501 against a section symbol. It would be
4502 proper to subtract the symbol's value,
4503 osec->vma, from the emitted reloc addend,
4504 but ld.so expects buggy relocs. */
4505 osec
= sec
->output_section
;
4506 sindx
= elf_section_data (osec
)->dynindx
;
4509 asection
*oi
= htab
->elf
.text_index_section
;
4510 sindx
= elf_section_data (oi
)->dynindx
;
4512 BFD_ASSERT (sindx
!= 0);
4515 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
4516 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4520 sreloc
= elf_section_data (input_section
)->sreloc
;
4522 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4524 r
= bfd_reloc_notsupported
;
4525 goto check_relocation_error
;
4528 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4530 /* If this reloc is against an external symbol, we do
4531 not want to fiddle with the addend. Otherwise, we
4532 need to include the symbol value so that it becomes
4533 an addend for the dynamic reloc. */
4540 case R_X86_64_TLSGD
:
4541 case R_X86_64_GOTPC32_TLSDESC
:
4542 case R_X86_64_TLSDESC_CALL
:
4543 case R_X86_64_GOTTPOFF
:
4544 tls_type
= GOT_UNKNOWN
;
4545 if (h
== NULL
&& local_got_offsets
)
4546 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
4548 tls_type
= elf_x86_hash_entry (h
)->tls_type
;
4550 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4551 input_section
, contents
,
4552 symtab_hdr
, sym_hashes
,
4553 &r_type
, tls_type
, rel
,
4554 relend
, h
, r_symndx
, TRUE
))
4557 if (r_type
== R_X86_64_TPOFF32
)
4559 bfd_vma roff
= rel
->r_offset
;
4561 BFD_ASSERT (! unresolved_reloc
);
4563 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4565 /* GD->LE transition. For 64bit, change
4566 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4567 .word 0x6666; rex64; call __tls_get_addr@PLT
4569 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4571 call *__tls_get_addr@GOTPCREL(%rip)
4572 which may be converted to
4573 addr32 call __tls_get_addr
4576 leaq foo@tpoff(%rax), %rax
4578 leaq foo@tlsgd(%rip), %rdi
4579 .word 0x6666; rex64; call __tls_get_addr@PLT
4581 leaq foo@tlsgd(%rip), %rdi
4583 call *__tls_get_addr@GOTPCREL(%rip)
4584 which may be converted to
4585 addr32 call __tls_get_addr
4588 leaq foo@tpoff(%rax), %rax
4589 For largepic, change:
4590 leaq foo@tlsgd(%rip), %rdi
4591 movabsq $__tls_get_addr@pltoff, %rax
4596 leaq foo@tpoff(%rax), %rax
4597 nopw 0x0(%rax,%rax,1) */
4599 if (ABI_64_P (output_bfd
))
4601 if (contents
[roff
+ 5] == 0xb8)
4603 memcpy (contents
+ roff
- 3,
4604 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4605 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4609 memcpy (contents
+ roff
- 4,
4610 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4614 memcpy (contents
+ roff
- 3,
4615 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4617 bfd_put_32 (output_bfd
,
4618 elf_x86_64_tpoff (info
, relocation
),
4619 contents
+ roff
+ 8 + largepic
);
4620 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
4621 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
4626 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4628 /* GDesc -> LE transition.
4629 It's originally something like:
4630 leaq x@tlsdesc(%rip), %rax
4633 movl $x@tpoff, %rax. */
4635 unsigned int val
, type
;
4637 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4638 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4639 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4640 contents
+ roff
- 3);
4641 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4642 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4643 contents
+ roff
- 1);
4644 bfd_put_32 (output_bfd
,
4645 elf_x86_64_tpoff (info
, relocation
),
4649 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4651 /* GDesc -> LE transition.
4656 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4657 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4660 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4662 /* IE->LE transition:
4663 For 64bit, originally it can be one of:
4664 movq foo@gottpoff(%rip), %reg
4665 addq foo@gottpoff(%rip), %reg
4668 leaq foo(%reg), %reg
4670 For 32bit, originally it can be one of:
4671 movq foo@gottpoff(%rip), %reg
4672 addl foo@gottpoff(%rip), %reg
4675 leal foo(%reg), %reg
4678 unsigned int val
, type
, reg
;
4681 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4684 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4685 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4691 bfd_put_8 (output_bfd
, 0x49,
4692 contents
+ roff
- 3);
4693 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4694 bfd_put_8 (output_bfd
, 0x41,
4695 contents
+ roff
- 3);
4696 bfd_put_8 (output_bfd
, 0xc7,
4697 contents
+ roff
- 2);
4698 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4699 contents
+ roff
- 1);
4703 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4706 bfd_put_8 (output_bfd
, 0x49,
4707 contents
+ roff
- 3);
4708 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4709 bfd_put_8 (output_bfd
, 0x41,
4710 contents
+ roff
- 3);
4711 bfd_put_8 (output_bfd
, 0x81,
4712 contents
+ roff
- 2);
4713 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4714 contents
+ roff
- 1);
4718 /* addq/addl -> leaq/leal */
4720 bfd_put_8 (output_bfd
, 0x4d,
4721 contents
+ roff
- 3);
4722 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4723 bfd_put_8 (output_bfd
, 0x45,
4724 contents
+ roff
- 3);
4725 bfd_put_8 (output_bfd
, 0x8d,
4726 contents
+ roff
- 2);
4727 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4728 contents
+ roff
- 1);
4730 bfd_put_32 (output_bfd
,
4731 elf_x86_64_tpoff (info
, relocation
),
4739 if (htab
->elf
.sgot
== NULL
)
4744 off
= h
->got
.offset
;
4745 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
4749 if (local_got_offsets
== NULL
)
4752 off
= local_got_offsets
[r_symndx
];
4753 offplt
= local_tlsdesc_gotents
[r_symndx
];
4760 Elf_Internal_Rela outrel
;
4764 if (htab
->elf
.srelgot
== NULL
)
4767 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4769 if (GOT_TLS_GDESC_P (tls_type
))
4771 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4772 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4773 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4774 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4775 + htab
->elf
.sgotplt
->output_offset
4777 + htab
->sgotplt_jump_table_size
);
4778 sreloc
= htab
->elf
.srelplt
;
4780 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
4782 outrel
.r_addend
= 0;
4783 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4786 sreloc
= htab
->elf
.srelgot
;
4788 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4789 + htab
->elf
.sgot
->output_offset
+ off
);
4791 if (GOT_TLS_GD_P (tls_type
))
4792 dr_type
= R_X86_64_DTPMOD64
;
4793 else if (GOT_TLS_GDESC_P (tls_type
))
4796 dr_type
= R_X86_64_TPOFF64
;
4798 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4799 outrel
.r_addend
= 0;
4800 if ((dr_type
== R_X86_64_TPOFF64
4801 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4802 outrel
.r_addend
= relocation
- _bfd_x86_elf_dtpoff_base (info
);
4803 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4805 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4807 if (GOT_TLS_GD_P (tls_type
))
4811 BFD_ASSERT (! unresolved_reloc
);
4812 bfd_put_64 (output_bfd
,
4813 relocation
- _bfd_x86_elf_dtpoff_base (info
),
4814 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4818 bfd_put_64 (output_bfd
, 0,
4819 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4820 outrel
.r_info
= htab
->r_info (indx
,
4822 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4823 elf_append_rela (output_bfd
, sreloc
,
4832 local_got_offsets
[r_symndx
] |= 1;
4835 if (off
>= (bfd_vma
) -2
4836 && ! GOT_TLS_GDESC_P (tls_type
))
4838 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4840 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4841 || r_type
== R_X86_64_TLSDESC_CALL
)
4842 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4843 + htab
->elf
.sgotplt
->output_offset
4844 + offplt
+ htab
->sgotplt_jump_table_size
;
4846 relocation
= htab
->elf
.sgot
->output_section
->vma
4847 + htab
->elf
.sgot
->output_offset
+ off
;
4848 unresolved_reloc
= FALSE
;
4852 bfd_vma roff
= rel
->r_offset
;
4854 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4856 /* GD->IE transition. For 64bit, change
4857 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4858 .word 0x6666; rex64; call __tls_get_addr@PLT
4860 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4862 call *__tls_get_addr@GOTPCREL(%rip
4863 which may be converted to
4864 addr32 call __tls_get_addr
4867 addq foo@gottpoff(%rip), %rax
4869 leaq foo@tlsgd(%rip), %rdi
4870 .word 0x6666; rex64; call __tls_get_addr@PLT
4872 leaq foo@tlsgd(%rip), %rdi
4874 call *__tls_get_addr@GOTPCREL(%rip)
4875 which may be converted to
4876 addr32 call __tls_get_addr
4879 addq foo@gottpoff(%rip), %rax
4880 For largepic, change:
4881 leaq foo@tlsgd(%rip), %rdi
4882 movabsq $__tls_get_addr@pltoff, %rax
4887 addq foo@gottpoff(%rax), %rax
4888 nopw 0x0(%rax,%rax,1) */
4890 if (ABI_64_P (output_bfd
))
4892 if (contents
[roff
+ 5] == 0xb8)
4894 memcpy (contents
+ roff
- 3,
4895 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4896 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4900 memcpy (contents
+ roff
- 4,
4901 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4905 memcpy (contents
+ roff
- 3,
4906 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4909 relocation
= (htab
->elf
.sgot
->output_section
->vma
4910 + htab
->elf
.sgot
->output_offset
+ off
4913 - input_section
->output_section
->vma
4914 - input_section
->output_offset
4916 bfd_put_32 (output_bfd
, relocation
,
4917 contents
+ roff
+ 8 + largepic
);
4918 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4923 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4925 /* GDesc -> IE transition.
4926 It's originally something like:
4927 leaq x@tlsdesc(%rip), %rax
4930 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4932 /* Now modify the instruction as appropriate. To
4933 turn a leaq into a movq in the form we use it, it
4934 suffices to change the second byte from 0x8d to
4936 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4938 bfd_put_32 (output_bfd
,
4939 htab
->elf
.sgot
->output_section
->vma
4940 + htab
->elf
.sgot
->output_offset
+ off
4942 - input_section
->output_section
->vma
4943 - input_section
->output_offset
4948 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4950 /* GDesc -> IE transition.
4957 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4958 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4966 case R_X86_64_TLSLD
:
4967 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4968 input_section
, contents
,
4969 symtab_hdr
, sym_hashes
,
4970 &r_type
, GOT_UNKNOWN
, rel
,
4971 relend
, h
, r_symndx
, TRUE
))
4974 if (r_type
!= R_X86_64_TLSLD
)
4976 /* LD->LE transition:
4977 leaq foo@tlsld(%rip), %rdi
4978 call __tls_get_addr@PLT
4979 For 64bit, we change it into:
4980 .word 0x6666; .byte 0x66; movq %fs:0, %rax
4981 For 32bit, we change it into:
4982 nopl 0x0(%rax); movl %fs:0, %eax
4984 leaq foo@tlsld(%rip), %rdi;
4985 call *__tls_get_addr@GOTPCREL(%rip)
4986 which may be converted to
4987 addr32 call __tls_get_addr
4988 For 64bit, we change it into:
4989 .word 0x6666; .word 0x6666; movq %fs:0, %rax
4990 For 32bit, we change it into:
4991 nopw 0x0(%rax); movl %fs:0, %eax
4992 For largepic, change:
4993 leaq foo@tlsgd(%rip), %rdi
4994 movabsq $__tls_get_addr@pltoff, %rax
4998 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
5001 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
5002 if (ABI_64_P (output_bfd
))
5004 if (contents
[rel
->r_offset
+ 5] == 0xb8)
5005 memcpy (contents
+ rel
->r_offset
- 3,
5006 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5007 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5008 else if (contents
[rel
->r_offset
+ 4] == 0xff
5009 || contents
[rel
->r_offset
+ 4] == 0x67)
5010 memcpy (contents
+ rel
->r_offset
- 3,
5011 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
5014 memcpy (contents
+ rel
->r_offset
- 3,
5015 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5019 if (contents
[rel
->r_offset
+ 4] == 0xff)
5020 memcpy (contents
+ rel
->r_offset
- 3,
5021 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
5024 memcpy (contents
+ rel
->r_offset
- 3,
5025 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5027 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
5028 and R_X86_64_PLTOFF64. */
5034 if (htab
->elf
.sgot
== NULL
)
5037 off
= htab
->tls_ld_or_ldm_got
.offset
;
5042 Elf_Internal_Rela outrel
;
5044 if (htab
->elf
.srelgot
== NULL
)
5047 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5048 + htab
->elf
.sgot
->output_offset
+ off
);
5050 bfd_put_64 (output_bfd
, 0,
5051 htab
->elf
.sgot
->contents
+ off
);
5052 bfd_put_64 (output_bfd
, 0,
5053 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
5054 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
5055 outrel
.r_addend
= 0;
5056 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
5058 htab
->tls_ld_or_ldm_got
.offset
|= 1;
5060 relocation
= htab
->elf
.sgot
->output_section
->vma
5061 + htab
->elf
.sgot
->output_offset
+ off
;
5062 unresolved_reloc
= FALSE
;
5065 case R_X86_64_DTPOFF32
:
5066 if (!bfd_link_executable (info
)
5067 || (input_section
->flags
& SEC_CODE
) == 0)
5068 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
5070 relocation
= elf_x86_64_tpoff (info
, relocation
);
5073 case R_X86_64_TPOFF32
:
5074 case R_X86_64_TPOFF64
:
5075 BFD_ASSERT (bfd_link_executable (info
));
5076 relocation
= elf_x86_64_tpoff (info
, relocation
);
5079 case R_X86_64_DTPOFF64
:
5080 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
5081 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
5088 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5089 because such sections are not SEC_ALLOC and thus ld.so will
5090 not process them. */
5091 if (unresolved_reloc
5092 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
5094 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5095 rel
->r_offset
) != (bfd_vma
) -1)
5100 sec
= h
->root
.u
.def
.section
;
5101 if ((info
->nocopyreloc
5102 || (eh
->def_protected
5103 && elf_has_no_copy_on_protected (h
->root
.u
.def
.section
->owner
)))
5104 && !(h
->root
.u
.def
.section
->flags
& SEC_CODE
))
5105 return elf_x86_64_need_pic (info
, input_bfd
, input_section
,
5106 h
, NULL
, NULL
, howto
);
5111 /* xgettext:c-format */
5112 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
5117 h
->root
.root
.string
);
5123 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5124 contents
, rel
->r_offset
,
5125 relocation
, rel
->r_addend
);
5127 check_relocation_error
:
5128 if (r
!= bfd_reloc_ok
)
5133 name
= h
->root
.root
.string
;
5136 name
= bfd_elf_string_from_elf_section (input_bfd
,
5137 symtab_hdr
->sh_link
,
5142 name
= bfd_section_name (input_bfd
, sec
);
5145 if (r
== bfd_reloc_overflow
)
5146 (*info
->callbacks
->reloc_overflow
)
5147 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5148 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
5152 /* xgettext:c-format */
5153 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
5154 input_bfd
, input_section
,
5155 rel
->r_offset
, name
, (int) r
);
5166 Elf_Internal_Shdr
*rel_hdr
;
5167 size_t deleted
= rel
- wrel
;
5169 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
5170 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5171 if (rel_hdr
->sh_size
== 0)
5173 /* It is too late to remove an empty reloc section. Leave
5175 ??? What is wrong with an empty section??? */
5176 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
5179 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
5180 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5181 input_section
->reloc_count
-= deleted
;
5187 /* Finish up dynamic symbol handling. We set the contents of various
5188 dynamic sections here. */
5191 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
5192 struct bfd_link_info
*info
,
5193 struct elf_link_hash_entry
*h
,
5194 Elf_Internal_Sym
*sym
)
5196 struct elf_x86_link_hash_table
*htab
;
5197 bfd_boolean use_plt_second
;
5198 struct elf_x86_link_hash_entry
*eh
;
5199 bfd_boolean local_undefweak
;
5201 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
5205 /* Use the second PLT section only if there is .plt section. */
5206 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
5208 eh
= (struct elf_x86_link_hash_entry
*) h
;
5209 if (eh
->no_finish_dynamic_symbol
)
5212 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5213 resolved undefined weak symbols in executable so that their
5214 references have value 0 at run-time. */
5215 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
5220 if (h
->plt
.offset
!= (bfd_vma
) -1)
5223 bfd_vma got_offset
, plt_offset
;
5224 Elf_Internal_Rela rela
;
5226 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
5227 const struct elf_backend_data
*bed
;
5228 bfd_vma plt_got_pcrel_offset
;
5230 /* When building a static executable, use .iplt, .igot.plt and
5231 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5232 if (htab
->elf
.splt
!= NULL
)
5234 plt
= htab
->elf
.splt
;
5235 gotplt
= htab
->elf
.sgotplt
;
5236 relplt
= htab
->elf
.srelplt
;
5240 plt
= htab
->elf
.iplt
;
5241 gotplt
= htab
->elf
.igotplt
;
5242 relplt
= htab
->elf
.irelplt
;
5245 /* This symbol has an entry in the procedure linkage table. Set
5247 if ((h
->dynindx
== -1
5249 && !((h
->forced_local
|| bfd_link_executable (info
))
5251 && h
->type
== STT_GNU_IFUNC
))
5257 /* Get the index in the procedure linkage table which
5258 corresponds to this symbol. This is the index of this symbol
5259 in all the symbols for which we are making plt entries. The
5260 first entry in the procedure linkage table is reserved.
5262 Get the offset into the .got table of the entry that
5263 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5264 bytes. The first three are reserved for the dynamic linker.
5266 For static executables, we don't reserve anything. */
5268 if (plt
== htab
->elf
.splt
)
5270 got_offset
= (h
->plt
.offset
/ htab
->plt
.plt_entry_size
5271 - htab
->plt
.has_plt0
);
5272 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
5276 got_offset
= h
->plt
.offset
/ htab
->plt
.plt_entry_size
;
5277 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
5280 /* Fill in the entry in the procedure linkage table. */
5281 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
5282 htab
->plt
.plt_entry_size
);
5285 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
5286 htab
->non_lazy_plt
->plt_entry
,
5287 htab
->non_lazy_plt
->plt_entry_size
);
5289 resolved_plt
= htab
->plt_second
;
5290 plt_offset
= eh
->plt_second
.offset
;
5295 plt_offset
= h
->plt
.offset
;
5298 /* Insert the relocation positions of the plt section. */
5300 /* Put offset the PC-relative instruction referring to the GOT entry,
5301 subtracting the size of that instruction. */
5302 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
5303 + gotplt
->output_offset
5305 - resolved_plt
->output_section
->vma
5306 - resolved_plt
->output_offset
5308 - htab
->plt
.plt_got_insn_size
);
5310 /* Check PC-relative offset overflow in PLT entry. */
5311 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
5312 /* xgettext:c-format */
5313 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5314 output_bfd
, h
->root
.root
.string
);
5316 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
5317 (resolved_plt
->contents
+ plt_offset
5318 + htab
->plt
.plt_got_offset
));
5320 /* Fill in the entry in the global offset table, initially this
5321 points to the second part of the PLT entry. Leave the entry
5322 as zero for undefined weak symbol in PIE. No PLT relocation
5323 against undefined weak symbol in PIE. */
5324 if (!local_undefweak
)
5326 if (htab
->plt
.has_plt0
)
5327 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5328 + plt
->output_offset
5330 + htab
->lazy_plt
->plt_lazy_offset
),
5331 gotplt
->contents
+ got_offset
);
5333 /* Fill in the entry in the .rela.plt section. */
5334 rela
.r_offset
= (gotplt
->output_section
->vma
5335 + gotplt
->output_offset
5337 if (h
->dynindx
== -1
5338 || ((bfd_link_executable (info
)
5339 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5341 && h
->type
== STT_GNU_IFUNC
))
5343 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
5344 h
->root
.root
.string
,
5345 h
->root
.u
.def
.section
->owner
);
5347 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5348 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5349 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
5350 rela
.r_addend
= (h
->root
.u
.def
.value
5351 + h
->root
.u
.def
.section
->output_section
->vma
5352 + h
->root
.u
.def
.section
->output_offset
);
5353 /* R_X86_64_IRELATIVE comes last. */
5354 plt_index
= htab
->next_irelative_index
--;
5358 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
5360 plt_index
= htab
->next_jump_slot_index
++;
5363 /* Don't fill the second and third slots in PLT entry for
5364 static executables nor without PLT0. */
5365 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
5368 = h
->plt
.offset
+ htab
->lazy_plt
->plt_plt_insn_end
;
5370 /* Put relocation index. */
5371 bfd_put_32 (output_bfd
, plt_index
,
5372 (plt
->contents
+ h
->plt
.offset
5373 + htab
->lazy_plt
->plt_reloc_offset
));
5375 /* Put offset for jmp .PLT0 and check for overflow. We don't
5376 check relocation index for overflow since branch displacement
5377 will overflow first. */
5378 if (plt0_offset
> 0x80000000)
5379 /* xgettext:c-format */
5380 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5381 output_bfd
, h
->root
.root
.string
);
5382 bfd_put_32 (output_bfd
, - plt0_offset
,
5383 (plt
->contents
+ h
->plt
.offset
5384 + htab
->lazy_plt
->plt_plt_offset
));
5387 bed
= get_elf_backend_data (output_bfd
);
5388 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
5389 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
5392 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5394 bfd_vma got_offset
, plt_offset
;
5395 asection
*plt
, *got
;
5396 bfd_boolean got_after_plt
;
5397 int32_t got_pcrel_offset
;
5399 /* Set the entry in the GOT procedure linkage table. */
5400 plt
= htab
->plt_got
;
5401 got
= htab
->elf
.sgot
;
5402 got_offset
= h
->got
.offset
;
5404 if (got_offset
== (bfd_vma
) -1
5405 || (h
->type
== STT_GNU_IFUNC
&& h
->def_regular
)
5410 /* Use the non-lazy PLT entry template for the GOT PLT since they
5411 are the identical. */
5412 /* Fill in the entry in the GOT procedure linkage table. */
5413 plt_offset
= eh
->plt_got
.offset
;
5414 memcpy (plt
->contents
+ plt_offset
,
5415 htab
->non_lazy_plt
->plt_entry
,
5416 htab
->non_lazy_plt
->plt_entry_size
);
5418 /* Put offset the PC-relative instruction referring to the GOT
5419 entry, subtracting the size of that instruction. */
5420 got_pcrel_offset
= (got
->output_section
->vma
5421 + got
->output_offset
5423 - plt
->output_section
->vma
5424 - plt
->output_offset
5426 - htab
->non_lazy_plt
->plt_got_insn_size
);
5428 /* Check PC-relative offset overflow in GOT PLT entry. */
5429 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
5430 if ((got_after_plt
&& got_pcrel_offset
< 0)
5431 || (!got_after_plt
&& got_pcrel_offset
> 0))
5432 /* xgettext:c-format */
5433 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5434 output_bfd
, h
->root
.root
.string
);
5436 bfd_put_32 (output_bfd
, got_pcrel_offset
,
5437 (plt
->contents
+ plt_offset
5438 + htab
->non_lazy_plt
->plt_got_offset
));
5441 if (!local_undefweak
5443 && (h
->plt
.offset
!= (bfd_vma
) -1
5444 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5446 /* Mark the symbol as undefined, rather than as defined in
5447 the .plt section. Leave the value if there were any
5448 relocations where pointer equality matters (this is a clue
5449 for the dynamic linker, to make function pointer
5450 comparisons work between an application and shared
5451 library), otherwise set it to zero. If a function is only
5452 called from a binary, there is no need to slow down
5453 shared libraries because of that. */
5454 sym
->st_shndx
= SHN_UNDEF
;
5455 if (!h
->pointer_equality_needed
)
5459 /* Don't generate dynamic GOT relocation against undefined weak
5460 symbol in executable. */
5461 if (h
->got
.offset
!= (bfd_vma
) -1
5462 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h
)->tls_type
)
5463 && elf_x86_hash_entry (h
)->tls_type
!= GOT_TLS_IE
5464 && !local_undefweak
)
5466 Elf_Internal_Rela rela
;
5467 asection
*relgot
= htab
->elf
.srelgot
;
5469 /* This symbol has an entry in the global offset table. Set it
5471 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5474 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5475 + htab
->elf
.sgot
->output_offset
5476 + (h
->got
.offset
&~ (bfd_vma
) 1));
5478 /* If this is a static link, or it is a -Bsymbolic link and the
5479 symbol is defined locally or was forced to be local because
5480 of a version file, we just want to emit a RELATIVE reloc.
5481 The entry in the global offset table will already have been
5482 initialized in the relocate_section function. */
5484 && h
->type
== STT_GNU_IFUNC
)
5486 if (h
->plt
.offset
== (bfd_vma
) -1)
5488 /* STT_GNU_IFUNC is referenced without PLT. */
5489 if (htab
->elf
.splt
== NULL
)
5491 /* use .rel[a].iplt section to store .got relocations
5492 in static executable. */
5493 relgot
= htab
->elf
.irelplt
;
5495 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
5497 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
5499 h
->root
.root
.string
,
5500 h
->root
.u
.def
.section
->owner
);
5502 rela
.r_info
= htab
->r_info (0,
5503 R_X86_64_IRELATIVE
);
5504 rela
.r_addend
= (h
->root
.u
.def
.value
5505 + h
->root
.u
.def
.section
->output_section
->vma
5506 + h
->root
.u
.def
.section
->output_offset
);
5511 else if (bfd_link_pic (info
))
5513 /* Generate R_X86_64_GLOB_DAT. */
5521 if (!h
->pointer_equality_needed
)
5524 /* For non-shared object, we can't use .got.plt, which
5525 contains the real function addres if we need pointer
5526 equality. We load the GOT entry with the PLT entry. */
5527 if (htab
->plt_second
!= NULL
)
5529 plt
= htab
->plt_second
;
5530 plt_offset
= eh
->plt_second
.offset
;
5534 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5535 plt_offset
= h
->plt
.offset
;
5537 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5538 + plt
->output_offset
5540 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5544 else if (bfd_link_pic (info
)
5545 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5547 if (!h
->def_regular
)
5549 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5550 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
5551 rela
.r_addend
= (h
->root
.u
.def
.value
5552 + h
->root
.u
.def
.section
->output_section
->vma
5553 + h
->root
.u
.def
.section
->output_offset
);
5557 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5559 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5560 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5561 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
5565 elf_append_rela (output_bfd
, relgot
, &rela
);
5570 Elf_Internal_Rela rela
;
5573 /* This symbol needs a copy reloc. Set it up. */
5575 if (h
->dynindx
== -1
5576 || (h
->root
.type
!= bfd_link_hash_defined
5577 && h
->root
.type
!= bfd_link_hash_defweak
)
5578 || htab
->elf
.srelbss
== NULL
5579 || htab
->elf
.sreldynrelro
== NULL
)
5582 rela
.r_offset
= (h
->root
.u
.def
.value
5583 + h
->root
.u
.def
.section
->output_section
->vma
5584 + h
->root
.u
.def
.section
->output_offset
);
5585 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
5587 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
5588 s
= htab
->elf
.sreldynrelro
;
5590 s
= htab
->elf
.srelbss
;
5591 elf_append_rela (output_bfd
, s
, &rela
);
5597 /* Finish up local dynamic symbol handling. We set the contents of
5598 various dynamic sections here. */
5601 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
5603 struct elf_link_hash_entry
*h
5604 = (struct elf_link_hash_entry
*) *slot
;
5605 struct bfd_link_info
*info
5606 = (struct bfd_link_info
*) inf
;
5608 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
5612 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5613 here since undefined weak symbol may not be dynamic and may not be
5614 called for elf_x86_64_finish_dynamic_symbol. */
5617 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
5620 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
5621 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5623 if (h
->root
.type
!= bfd_link_hash_undefweak
5624 || h
->dynindx
!= -1)
5627 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
5631 /* Used to decide how to sort relocs in an optimal manner for the
5632 dynamic linker, before writing them out. */
5634 static enum elf_reloc_type_class
5635 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info
,
5636 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5637 const Elf_Internal_Rela
*rela
)
5639 bfd
*abfd
= info
->output_bfd
;
5640 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5641 struct elf_x86_link_hash_table
*htab
5642 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
5644 if (htab
->elf
.dynsym
!= NULL
5645 && htab
->elf
.dynsym
->contents
!= NULL
)
5647 /* Check relocation against STT_GNU_IFUNC symbol if there are
5649 unsigned long r_symndx
= htab
->r_sym (rela
->r_info
);
5650 if (r_symndx
!= STN_UNDEF
)
5652 Elf_Internal_Sym sym
;
5653 if (!bed
->s
->swap_symbol_in (abfd
,
5654 (htab
->elf
.dynsym
->contents
5655 + r_symndx
* bed
->s
->sizeof_sym
),
5659 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
5660 return reloc_class_ifunc
;
5664 switch ((int) ELF32_R_TYPE (rela
->r_info
))
5666 case R_X86_64_IRELATIVE
:
5667 return reloc_class_ifunc
;
5668 case R_X86_64_RELATIVE
:
5669 case R_X86_64_RELATIVE64
:
5670 return reloc_class_relative
;
5671 case R_X86_64_JUMP_SLOT
:
5672 return reloc_class_plt
;
5674 return reloc_class_copy
;
5676 return reloc_class_normal
;
5680 /* Finish up the dynamic sections. */
5683 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
5684 struct bfd_link_info
*info
)
5686 struct elf_x86_link_hash_table
*htab
;
5690 htab
= elf_x86_hash_table (info
, X86_64_ELF_DATA
);
5694 dynobj
= htab
->elf
.dynobj
;
5695 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5697 if (htab
->elf
.dynamic_sections_created
)
5699 bfd_byte
*dyncon
, *dynconend
;
5700 const struct elf_backend_data
*bed
;
5701 bfd_size_type sizeof_dyn
;
5703 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5706 bed
= get_elf_backend_data (dynobj
);
5707 sizeof_dyn
= bed
->s
->sizeof_dyn
;
5708 dyncon
= sdyn
->contents
;
5709 dynconend
= sdyn
->contents
+ sdyn
->size
;
5710 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
5712 Elf_Internal_Dyn dyn
;
5715 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
5723 s
= htab
->elf
.sgotplt
;
5724 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5728 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
5732 s
= htab
->elf
.srelplt
->output_section
;
5733 dyn
.d_un
.d_val
= s
->size
;
5736 case DT_TLSDESC_PLT
:
5738 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5739 + htab
->tlsdesc_plt
;
5742 case DT_TLSDESC_GOT
:
5744 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5745 + htab
->tlsdesc_got
;
5749 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
5752 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5754 elf_section_data (htab
->elf
.splt
->output_section
)
5755 ->this_hdr
.sh_entsize
= htab
->plt
.plt_entry_size
;
5757 if (htab
->plt
.has_plt0
)
5759 /* Fill in the special first entry in the procedure linkage
5761 memcpy (htab
->elf
.splt
->contents
,
5762 htab
->lazy_plt
->plt0_entry
,
5763 htab
->lazy_plt
->plt0_entry_size
);
5764 /* Add offset for pushq GOT+8(%rip), since the instruction
5765 uses 6 bytes subtract this value. */
5766 bfd_put_32 (output_bfd
,
5767 (htab
->elf
.sgotplt
->output_section
->vma
5768 + htab
->elf
.sgotplt
->output_offset
5770 - htab
->elf
.splt
->output_section
->vma
5771 - htab
->elf
.splt
->output_offset
5773 (htab
->elf
.splt
->contents
5774 + htab
->lazy_plt
->plt0_got1_offset
));
5775 /* Add offset for the PC-relative instruction accessing
5776 GOT+16, subtracting the offset to the end of that
5778 bfd_put_32 (output_bfd
,
5779 (htab
->elf
.sgotplt
->output_section
->vma
5780 + htab
->elf
.sgotplt
->output_offset
5782 - htab
->elf
.splt
->output_section
->vma
5783 - htab
->elf
.splt
->output_offset
5784 - htab
->lazy_plt
->plt0_got2_insn_end
),
5785 (htab
->elf
.splt
->contents
5786 + htab
->lazy_plt
->plt0_got2_offset
));
5788 if (htab
->tlsdesc_plt
)
5790 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5791 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
5793 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
5794 htab
->lazy_plt
->plt0_entry
,
5795 htab
->lazy_plt
->plt0_entry_size
);
5797 /* Add offset for pushq GOT+8(%rip), since the
5798 instruction uses 6 bytes subtract this value. */
5799 bfd_put_32 (output_bfd
,
5800 (htab
->elf
.sgotplt
->output_section
->vma
5801 + htab
->elf
.sgotplt
->output_offset
5803 - htab
->elf
.splt
->output_section
->vma
5804 - htab
->elf
.splt
->output_offset
5807 (htab
->elf
.splt
->contents
5809 + htab
->lazy_plt
->plt0_got1_offset
));
5810 /* Add offset for the PC-relative instruction accessing
5811 GOT+TDG, where TDG stands for htab->tlsdesc_got,
5812 subtracting the offset to the end of that
5814 bfd_put_32 (output_bfd
,
5815 (htab
->elf
.sgot
->output_section
->vma
5816 + htab
->elf
.sgot
->output_offset
5818 - htab
->elf
.splt
->output_section
->vma
5819 - htab
->elf
.splt
->output_offset
5821 - htab
->lazy_plt
->plt0_got2_insn_end
),
5822 (htab
->elf
.splt
->contents
5824 + htab
->lazy_plt
->plt0_got2_offset
));
5829 if (htab
->plt_got
!= NULL
&& htab
->plt_got
->size
> 0)
5830 elf_section_data (htab
->plt_got
->output_section
)
5831 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
5833 if (htab
->plt_second
!= NULL
&& htab
->plt_second
->size
> 0)
5834 elf_section_data (htab
->plt_second
->output_section
)
5835 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
5838 /* GOT is always created in setup_gnu_properties. But it may not be
5840 if (htab
->elf
.sgotplt
&& htab
->elf
.sgotplt
->size
> 0)
5842 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5845 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5849 /* Set the first entry in the global offset table to the address of
5850 the dynamic section. */
5852 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
5854 bfd_put_64 (output_bfd
,
5855 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5856 htab
->elf
.sgotplt
->contents
);
5857 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5858 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5859 htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
5860 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5861 htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
5863 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
5867 /* Adjust .eh_frame for .plt section. */
5868 if (htab
->plt_eh_frame
!= NULL
5869 && htab
->plt_eh_frame
->contents
!= NULL
)
5871 if (htab
->elf
.splt
!= NULL
5872 && htab
->elf
.splt
->size
!= 0
5873 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5874 && htab
->elf
.splt
->output_section
!= NULL
5875 && htab
->plt_eh_frame
->output_section
!= NULL
)
5877 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5878 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5879 + htab
->plt_eh_frame
->output_offset
5880 + PLT_FDE_START_OFFSET
;
5881 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5882 htab
->plt_eh_frame
->contents
5883 + PLT_FDE_START_OFFSET
);
5885 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5887 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5889 htab
->plt_eh_frame
->contents
))
5894 /* Adjust .eh_frame for .plt.got section. */
5895 if (htab
->plt_got_eh_frame
!= NULL
5896 && htab
->plt_got_eh_frame
->contents
!= NULL
)
5898 if (htab
->plt_got
!= NULL
5899 && htab
->plt_got
->size
!= 0
5900 && (htab
->plt_got
->flags
& SEC_EXCLUDE
) == 0
5901 && htab
->plt_got
->output_section
!= NULL
5902 && htab
->plt_got_eh_frame
->output_section
!= NULL
)
5904 bfd_vma plt_start
= htab
->plt_got
->output_section
->vma
;
5905 bfd_vma eh_frame_start
= htab
->plt_got_eh_frame
->output_section
->vma
5906 + htab
->plt_got_eh_frame
->output_offset
5907 + PLT_FDE_START_OFFSET
;
5908 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5909 htab
->plt_got_eh_frame
->contents
5910 + PLT_FDE_START_OFFSET
);
5912 if (htab
->plt_got_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5914 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5915 htab
->plt_got_eh_frame
,
5916 htab
->plt_got_eh_frame
->contents
))
5921 /* Adjust .eh_frame for the second PLT section. */
5922 if (htab
->plt_second_eh_frame
!= NULL
5923 && htab
->plt_second_eh_frame
->contents
!= NULL
)
5925 if (htab
->plt_second
!= NULL
5926 && htab
->plt_second
->size
!= 0
5927 && (htab
->plt_second
->flags
& SEC_EXCLUDE
) == 0
5928 && htab
->plt_second
->output_section
!= NULL
5929 && htab
->plt_second_eh_frame
->output_section
!= NULL
)
5931 bfd_vma plt_start
= htab
->plt_second
->output_section
->vma
;
5932 bfd_vma eh_frame_start
5933 = (htab
->plt_second_eh_frame
->output_section
->vma
5934 + htab
->plt_second_eh_frame
->output_offset
5935 + PLT_FDE_START_OFFSET
);
5936 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5937 htab
->plt_second_eh_frame
->contents
5938 + PLT_FDE_START_OFFSET
);
5940 if (htab
->plt_second_eh_frame
->sec_info_type
5941 == SEC_INFO_TYPE_EH_FRAME
)
5943 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5944 htab
->plt_second_eh_frame
,
5945 htab
->plt_second_eh_frame
->contents
))
5950 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5951 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
5954 /* Fill PLT entries for undefined weak symbols in PIE. */
5955 if (bfd_link_pie (info
))
5956 bfd_hash_traverse (&info
->hash
->table
,
5957 elf_x86_64_pie_finish_undefweak_symbol
,
5963 /* Fill PLT/GOT entries and allocate dynamic relocations for local
5964 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5965 It has to be done before elf_link_sort_relocs is called so that
5966 dynamic relocations are properly sorted. */
5969 elf_x86_64_output_arch_local_syms
5970 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
5971 struct bfd_link_info
*info
,
5972 void *flaginfo ATTRIBUTE_UNUSED
,
5973 int (*func
) (void *, const char *,
5976 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
5978 struct elf_x86_link_hash_table
*htab
5979 = elf_x86_hash_table (info
, X86_64_ELF_DATA
);
5983 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5984 htab_traverse (htab
->loc_hash_table
,
5985 elf_x86_64_finish_local_dynamic_symbol
,
5991 /* Forward declaration. */
5992 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
;
5994 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
5995 dynamic relocations. */
5998 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
5999 long symcount ATTRIBUTE_UNUSED
,
6000 asymbol
**syms ATTRIBUTE_UNUSED
,
6007 bfd_byte
*plt_contents
;
6009 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
6010 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
6011 const struct elf_x86_lazy_plt_layout
*lazy_bnd_plt
;
6012 const struct elf_x86_non_lazy_plt_layout
*non_lazy_bnd_plt
;
6013 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
6014 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
6016 enum elf_x86_plt_type plt_type
;
6017 struct elf_x86_plt plts
[] =
6019 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
6020 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
6021 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
6022 { ".plt.bnd", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
6023 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
6028 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
6031 if (dynsymcount
<= 0)
6034 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
6038 if (get_elf_x86_64_backend_data (abfd
)->os
== is_normal
)
6040 lazy_plt
= &elf_x86_64_lazy_plt
;
6041 non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
6042 lazy_bnd_plt
= &elf_x86_64_lazy_bnd_plt
;
6043 non_lazy_bnd_plt
= &elf_x86_64_non_lazy_bnd_plt
;
6044 if (ABI_64_P (abfd
))
6046 lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
6047 non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
6051 lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
6052 non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
6057 lazy_plt
= &elf_x86_64_nacl_plt
;
6058 non_lazy_plt
= NULL
;
6059 lazy_bnd_plt
= NULL
;
6060 non_lazy_bnd_plt
= NULL
;
6061 lazy_ibt_plt
= NULL
;
6062 non_lazy_ibt_plt
= NULL
;
6066 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6068 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
6069 if (plt
== NULL
|| plt
->size
== 0)
6072 /* Get the PLT section contents. */
6073 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
6074 if (plt_contents
== NULL
)
6076 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
6077 plt_contents
, 0, plt
->size
))
6079 free (plt_contents
);
6083 /* Check what kind of PLT it is. */
6084 plt_type
= plt_unknown
;
6085 if (plts
[j
].type
== plt_unknown
6086 && (plt
->size
>= (lazy_plt
->plt_entry_size
6087 + lazy_plt
->plt_entry_size
)))
6089 /* Match lazy PLT first. Need to check the first two
6091 if ((memcmp (plt_contents
, lazy_plt
->plt0_entry
,
6092 lazy_plt
->plt0_got1_offset
) == 0)
6093 && (memcmp (plt_contents
+ 6, lazy_plt
->plt0_entry
+ 6,
6095 plt_type
= plt_lazy
;
6096 else if (lazy_bnd_plt
!= NULL
6097 && (memcmp (plt_contents
, lazy_bnd_plt
->plt0_entry
,
6098 lazy_bnd_plt
->plt0_got1_offset
) == 0)
6099 && (memcmp (plt_contents
+ 6,
6100 lazy_bnd_plt
->plt0_entry
+ 6, 3) == 0))
6102 plt_type
= plt_lazy
| plt_second
;
6103 /* The fist entry in the lazy IBT PLT is the same as the
6105 if ((memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
6106 lazy_ibt_plt
->plt_entry
,
6107 lazy_ibt_plt
->plt_got_offset
) == 0))
6108 lazy_plt
= lazy_ibt_plt
;
6110 lazy_plt
= lazy_bnd_plt
;
6114 if (non_lazy_plt
!= NULL
6115 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
6116 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
6118 /* Match non-lazy PLT. */
6119 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
6120 non_lazy_plt
->plt_got_offset
) == 0)
6121 plt_type
= plt_non_lazy
;
6124 if (plt_type
== plt_unknown
|| plt_type
== plt_second
)
6126 if (non_lazy_bnd_plt
!= NULL
6127 && plt
->size
>= non_lazy_bnd_plt
->plt_entry_size
6128 && (memcmp (plt_contents
, non_lazy_bnd_plt
->plt_entry
,
6129 non_lazy_bnd_plt
->plt_got_offset
) == 0))
6131 /* Match BND PLT. */
6132 plt_type
= plt_second
;
6133 non_lazy_plt
= non_lazy_bnd_plt
;
6135 else if (non_lazy_ibt_plt
!= NULL
6136 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
6137 && (memcmp (plt_contents
,
6138 non_lazy_ibt_plt
->plt_entry
,
6139 non_lazy_ibt_plt
->plt_got_offset
) == 0))
6141 /* Match IBT PLT. */
6142 plt_type
= plt_second
;
6143 non_lazy_plt
= non_lazy_ibt_plt
;
6147 if (plt_type
== plt_unknown
)
6149 free (plt_contents
);
6154 plts
[j
].type
= plt_type
;
6156 if ((plt_type
& plt_lazy
))
6158 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
6159 plts
[j
].plt_got_insn_size
= lazy_plt
->plt_got_insn_size
;
6160 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
6161 /* Skip PLT0 in lazy PLT. */
6166 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
6167 plts
[j
].plt_got_insn_size
= non_lazy_plt
->plt_got_insn_size
;
6168 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
6172 /* Skip lazy PLT when the second PLT is used. */
6173 if (plt_type
== (plt_lazy
| plt_second
))
6177 n
= plt
->size
/ plts
[j
].plt_entry_size
;
6182 plts
[j
].contents
= plt_contents
;
6185 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
6186 (bfd_vma
) 0, plts
, dynsyms
,
6190 /* Handle an x86-64 specific section when reading an object file. This
6191 is called when elfcode.h finds a section with an unknown type. */
6194 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
6195 const char *name
, int shindex
)
6197 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
6200 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
6206 /* Hook called by the linker routine which adds symbols from an object
6207 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
6211 elf_x86_64_add_symbol_hook (bfd
*abfd
,
6212 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
6213 Elf_Internal_Sym
*sym
,
6214 const char **namep ATTRIBUTE_UNUSED
,
6215 flagword
*flagsp ATTRIBUTE_UNUSED
,
6221 switch (sym
->st_shndx
)
6223 case SHN_X86_64_LCOMMON
:
6224 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
6227 lcomm
= bfd_make_section_with_flags (abfd
,
6231 | SEC_LINKER_CREATED
));
6234 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
6237 *valp
= sym
->st_size
;
6245 /* Given a BFD section, try to locate the corresponding ELF section
6249 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
6250 asection
*sec
, int *index_return
)
6252 if (sec
== &_bfd_elf_large_com_section
)
6254 *index_return
= SHN_X86_64_LCOMMON
;
6260 /* Process a symbol. */
6263 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
6266 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
6268 switch (elfsym
->internal_elf_sym
.st_shndx
)
6270 case SHN_X86_64_LCOMMON
:
6271 asym
->section
= &_bfd_elf_large_com_section
;
6272 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
6273 /* Common symbol doesn't set BSF_GLOBAL. */
6274 asym
->flags
&= ~BSF_GLOBAL
;
6280 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
6282 return (sym
->st_shndx
== SHN_COMMON
6283 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
6287 elf_x86_64_common_section_index (asection
*sec
)
6289 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
6292 return SHN_X86_64_LCOMMON
;
6296 elf_x86_64_common_section (asection
*sec
)
6298 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
6299 return bfd_com_section_ptr
;
6301 return &_bfd_elf_large_com_section
;
6305 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
6306 const Elf_Internal_Sym
*sym
,
6311 const asection
*oldsec
)
6313 /* A normal common symbol and a large common symbol result in a
6314 normal common symbol. We turn the large common symbol into a
6317 && h
->root
.type
== bfd_link_hash_common
6319 && bfd_is_com_section (*psec
)
6322 if (sym
->st_shndx
== SHN_COMMON
6323 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
6325 h
->root
.u
.c
.p
->section
6326 = bfd_make_section_old_way (oldbfd
, "COMMON");
6327 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
6329 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
6330 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
6331 *psec
= bfd_com_section_ptr
;
6338 elf_x86_64_additional_program_headers (bfd
*abfd
,
6339 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
6344 /* Check to see if we need a large readonly segment. */
6345 s
= bfd_get_section_by_name (abfd
, ".lrodata");
6346 if (s
&& (s
->flags
& SEC_LOAD
))
6349 /* Check to see if we need a large data segment. Since .lbss sections
6350 is placed right after the .bss section, there should be no need for
6351 a large data segment just because of .lbss. */
6352 s
= bfd_get_section_by_name (abfd
, ".ldata");
6353 if (s
&& (s
->flags
& SEC_LOAD
))
6359 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
6362 elf_x86_64_relocs_compatible (const bfd_target
*input
,
6363 const bfd_target
*output
)
6365 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
6366 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
6367 && _bfd_elf_relocs_compatible (input
, output
));
6370 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
6371 with GNU properties if found. Otherwise, return NULL. */
6374 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info
*info
)
6376 struct elf_x86_plt_layout_table plt_layout
;
6378 plt_layout
.is_vxworks
= FALSE
;
6379 if (get_elf_x86_64_backend_data (info
->output_bfd
)->os
== is_normal
)
6383 plt_layout
.lazy_plt
= &elf_x86_64_lazy_bnd_plt
;
6384 plt_layout
.non_lazy_plt
= &elf_x86_64_non_lazy_bnd_plt
;
6388 plt_layout
.lazy_plt
= &elf_x86_64_lazy_plt
;
6389 plt_layout
.non_lazy_plt
= &elf_x86_64_non_lazy_plt
;
6392 if (ABI_64_P (info
->output_bfd
))
6394 plt_layout
.lazy_ibt_plt
= &elf_x86_64_lazy_ibt_plt
;
6395 plt_layout
.non_lazy_ibt_plt
= &elf_x86_64_non_lazy_ibt_plt
;
6399 plt_layout
.lazy_ibt_plt
= &elf_x32_lazy_ibt_plt
;
6400 plt_layout
.non_lazy_ibt_plt
= &elf_x32_non_lazy_ibt_plt
;
6402 plt_layout
.normal_target
= TRUE
;
6406 plt_layout
.lazy_plt
= &elf_x86_64_nacl_plt
;
6407 plt_layout
.non_lazy_plt
= NULL
;
6408 plt_layout
.lazy_ibt_plt
= NULL
;
6409 plt_layout
.non_lazy_ibt_plt
= NULL
;
6410 plt_layout
.normal_target
= FALSE
;
6413 return _bfd_x86_elf_link_setup_gnu_properties (info
, &plt_layout
);
6416 static const struct bfd_elf_special_section
6417 elf_x86_64_special_sections
[]=
6419 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6420 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
6421 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
6422 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6423 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6424 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
6425 { NULL
, 0, 0, 0, 0 }
6428 #define TARGET_LITTLE_SYM x86_64_elf64_vec
6429 #define TARGET_LITTLE_NAME "elf64-x86-64"
6430 #define ELF_ARCH bfd_arch_i386
6431 #define ELF_TARGET_ID X86_64_ELF_DATA
6432 #define ELF_MACHINE_CODE EM_X86_64
6433 #define ELF_MAXPAGESIZE 0x200000
6434 #define ELF_MINPAGESIZE 0x1000
6435 #define ELF_COMMONPAGESIZE 0x1000
6437 #define elf_backend_can_gc_sections 1
6438 #define elf_backend_can_refcount 1
6439 #define elf_backend_want_got_plt 1
6440 #define elf_backend_plt_readonly 1
6441 #define elf_backend_want_plt_sym 0
6442 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
6443 #define elf_backend_rela_normal 1
6444 #define elf_backend_plt_alignment 4
6445 #define elf_backend_extern_protected_data 1
6446 #define elf_backend_caches_rawsize 1
6447 #define elf_backend_dtrel_excludes_plt 1
6448 #define elf_backend_want_dynrelro 1
6450 #define elf_info_to_howto elf_x86_64_info_to_howto
6452 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
6453 #define bfd_elf64_bfd_reloc_name_lookup \
6454 elf_x86_64_reloc_name_lookup
6456 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
6457 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
6458 #define elf_backend_check_relocs elf_x86_64_check_relocs
6459 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
6460 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6461 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6462 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
6463 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
6464 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6465 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
6467 #define elf_backend_write_core_note elf_x86_64_write_core_note
6469 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6470 #define elf_backend_relocate_section elf_x86_64_relocate_section
6471 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6472 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
6473 #define elf_backend_object_p elf64_x86_64_elf_object_p
6474 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
6476 #define elf_backend_section_from_shdr \
6477 elf_x86_64_section_from_shdr
6479 #define elf_backend_section_from_bfd_section \
6480 elf_x86_64_elf_section_from_bfd_section
6481 #define elf_backend_add_symbol_hook \
6482 elf_x86_64_add_symbol_hook
6483 #define elf_backend_symbol_processing \
6484 elf_x86_64_symbol_processing
6485 #define elf_backend_common_section_index \
6486 elf_x86_64_common_section_index
6487 #define elf_backend_common_section \
6488 elf_x86_64_common_section
6489 #define elf_backend_common_definition \
6490 elf_x86_64_common_definition
6491 #define elf_backend_merge_symbol \
6492 elf_x86_64_merge_symbol
6493 #define elf_backend_special_sections \
6494 elf_x86_64_special_sections
6495 #define elf_backend_additional_program_headers \
6496 elf_x86_64_additional_program_headers
6497 #define elf_backend_setup_gnu_properties \
6498 elf_x86_64_link_setup_gnu_properties
6500 #include "elf64-target.h"
6502 /* CloudABI support. */
6504 #undef TARGET_LITTLE_SYM
6505 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6506 #undef TARGET_LITTLE_NAME
6507 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6510 #define ELF_OSABI ELFOSABI_CLOUDABI
6513 #define elf64_bed elf64_x86_64_cloudabi_bed
6515 #include "elf64-target.h"
6517 /* FreeBSD support. */
6519 #undef TARGET_LITTLE_SYM
6520 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
6521 #undef TARGET_LITTLE_NAME
6522 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6525 #define ELF_OSABI ELFOSABI_FREEBSD
6528 #define elf64_bed elf64_x86_64_fbsd_bed
6530 #include "elf64-target.h"
6532 /* Solaris 2 support. */
6534 #undef TARGET_LITTLE_SYM
6535 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
6536 #undef TARGET_LITTLE_NAME
6537 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6539 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6540 objects won't be recognized. */
6544 #define elf64_bed elf64_x86_64_sol2_bed
6546 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6548 #undef elf_backend_static_tls_alignment
6549 #define elf_backend_static_tls_alignment 16
6551 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6553 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6555 #undef elf_backend_want_plt_sym
6556 #define elf_backend_want_plt_sym 1
6558 #undef elf_backend_strtab_flags
6559 #define elf_backend_strtab_flags SHF_STRINGS
6562 elf64_x86_64_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
6563 bfd
*obfd ATTRIBUTE_UNUSED
,
6564 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
6565 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
6567 /* PR 19938: FIXME: Need to add code for setting the sh_info
6568 and sh_link fields of Solaris specific section types. */
6572 #undef elf_backend_copy_special_section_fields
6573 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
6575 #include "elf64-target.h"
6577 /* Native Client support. */
6580 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
6582 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6583 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
6587 #undef TARGET_LITTLE_SYM
6588 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6589 #undef TARGET_LITTLE_NAME
6590 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6592 #define elf64_bed elf64_x86_64_nacl_bed
6594 #undef ELF_MAXPAGESIZE
6595 #undef ELF_MINPAGESIZE
6596 #undef ELF_COMMONPAGESIZE
6597 #define ELF_MAXPAGESIZE 0x10000
6598 #define ELF_MINPAGESIZE 0x10000
6599 #define ELF_COMMONPAGESIZE 0x10000
6601 /* Restore defaults. */
6603 #undef elf_backend_static_tls_alignment
6604 #undef elf_backend_want_plt_sym
6605 #define elf_backend_want_plt_sym 0
6606 #undef elf_backend_strtab_flags
6607 #undef elf_backend_copy_special_section_fields
6609 /* NaCl uses substantially different PLT entries for the same effects. */
6611 #undef elf_backend_plt_alignment
6612 #define elf_backend_plt_alignment 5
6613 #define NACL_PLT_ENTRY_SIZE 64
6614 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6616 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
6618 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6619 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6620 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6621 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6622 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6624 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6625 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6627 /* 32 bytes of nop to pad out to the standard size. */
6628 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
6629 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6630 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
6631 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6632 0x66, /* excess data16 prefix */
6636 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6638 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6639 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6640 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6641 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6643 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6644 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
6645 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6647 /* Lazy GOT entries point here (32-byte aligned). */
6648 0x68, /* pushq immediate */
6649 0, 0, 0, 0, /* replaced with index into relocation table. */
6650 0xe9, /* jmp relative */
6651 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6653 /* 22 bytes of nop to pad out to the standard size. */
6654 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
6655 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6656 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6659 /* .eh_frame covering the .plt section. */
6661 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
6663 #if (PLT_CIE_LENGTH != 20 \
6664 || PLT_FDE_LENGTH != 36 \
6665 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6666 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6667 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6669 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6670 0, 0, 0, 0, /* CIE ID */
6671 1, /* CIE version */
6672 'z', 'R', 0, /* Augmentation string */
6673 1, /* Code alignment factor */
6674 0x78, /* Data alignment factor */
6675 16, /* Return address column */
6676 1, /* Augmentation size */
6677 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6678 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6679 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6680 DW_CFA_nop
, DW_CFA_nop
,
6682 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6683 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
6684 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6685 0, 0, 0, 0, /* .plt size goes here */
6686 0, /* Augmentation size */
6687 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
6688 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6689 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
6690 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6691 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6692 13, /* Block length */
6693 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
6694 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
6695 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6696 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
6697 DW_CFA_nop
, DW_CFA_nop
6700 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt
=
6702 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
6703 NACL_PLT_ENTRY_SIZE
, /* plt0_entry_size */
6704 elf_x86_64_nacl_plt_entry
, /* plt_entry */
6705 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6706 2, /* plt0_got1_offset */
6707 9, /* plt0_got2_offset */
6708 13, /* plt0_got2_insn_end */
6709 3, /* plt_got_offset */
6710 33, /* plt_reloc_offset */
6711 38, /* plt_plt_offset */
6712 7, /* plt_got_insn_size */
6713 42, /* plt_plt_insn_end */
6714 32, /* plt_lazy_offset */
6715 elf_x86_64_nacl_plt0_entry
, /* pic_plt0_entry */
6716 elf_x86_64_nacl_plt_entry
, /* pic_plt_entry */
6717 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
6718 sizeof (elf_x86_64_nacl_eh_frame_plt
) /* eh_frame_plt_size */
6721 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
6726 #undef elf_backend_arch_data
6727 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6729 #undef elf_backend_object_p
6730 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6731 #undef elf_backend_modify_segment_map
6732 #define elf_backend_modify_segment_map nacl_modify_segment_map
6733 #undef elf_backend_modify_program_headers
6734 #define elf_backend_modify_program_headers nacl_modify_program_headers
6735 #undef elf_backend_final_write_processing
6736 #define elf_backend_final_write_processing nacl_final_write_processing
6738 #include "elf64-target.h"
6740 /* Native Client x32 support. */
6743 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
6745 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6746 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
6750 #undef TARGET_LITTLE_SYM
6751 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6752 #undef TARGET_LITTLE_NAME
6753 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6755 #define elf32_bed elf32_x86_64_nacl_bed
6757 #define bfd_elf32_bfd_reloc_type_lookup \
6758 elf_x86_64_reloc_type_lookup
6759 #define bfd_elf32_bfd_reloc_name_lookup \
6760 elf_x86_64_reloc_name_lookup
6761 #define bfd_elf32_get_synthetic_symtab \
6762 elf_x86_64_get_synthetic_symtab
6764 #undef elf_backend_object_p
6765 #define elf_backend_object_p \
6766 elf32_x86_64_nacl_elf_object_p
6768 #undef elf_backend_bfd_from_remote_memory
6769 #define elf_backend_bfd_from_remote_memory \
6770 _bfd_elf32_bfd_from_remote_memory
6772 #undef elf_backend_size_info
6773 #define elf_backend_size_info \
6774 _bfd_elf32_size_info
6776 #include "elf32-target.h"
6778 /* Restore defaults. */
6779 #undef elf_backend_object_p
6780 #define elf_backend_object_p elf64_x86_64_elf_object_p
6781 #undef elf_backend_bfd_from_remote_memory
6782 #undef elf_backend_size_info
6783 #undef elf_backend_modify_segment_map
6784 #undef elf_backend_modify_program_headers
6785 #undef elf_backend_final_write_processing
6787 /* Intel L1OM support. */
6790 elf64_l1om_elf_object_p (bfd
*abfd
)
6792 /* Set the right machine number for an L1OM elf64 file. */
6793 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
6797 #undef TARGET_LITTLE_SYM
6798 #define TARGET_LITTLE_SYM l1om_elf64_vec
6799 #undef TARGET_LITTLE_NAME
6800 #define TARGET_LITTLE_NAME "elf64-l1om"
6802 #define ELF_ARCH bfd_arch_l1om
6804 #undef ELF_MACHINE_CODE
6805 #define ELF_MACHINE_CODE EM_L1OM
6810 #define elf64_bed elf64_l1om_bed
6812 #undef elf_backend_object_p
6813 #define elf_backend_object_p elf64_l1om_elf_object_p
6815 /* Restore defaults. */
6816 #undef ELF_MAXPAGESIZE
6817 #undef ELF_MINPAGESIZE
6818 #undef ELF_COMMONPAGESIZE
6819 #define ELF_MAXPAGESIZE 0x200000
6820 #define ELF_MINPAGESIZE 0x1000
6821 #define ELF_COMMONPAGESIZE 0x1000
6822 #undef elf_backend_plt_alignment
6823 #define elf_backend_plt_alignment 4
6824 #undef elf_backend_arch_data
6825 #define elf_backend_arch_data &elf_x86_64_arch_bed
6827 #include "elf64-target.h"
6829 /* FreeBSD L1OM support. */
6831 #undef TARGET_LITTLE_SYM
6832 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6833 #undef TARGET_LITTLE_NAME
6834 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6837 #define ELF_OSABI ELFOSABI_FREEBSD
6840 #define elf64_bed elf64_l1om_fbsd_bed
6842 #include "elf64-target.h"
6844 /* Intel K1OM support. */
6847 elf64_k1om_elf_object_p (bfd
*abfd
)
6849 /* Set the right machine number for an K1OM elf64 file. */
6850 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
6854 #undef TARGET_LITTLE_SYM
6855 #define TARGET_LITTLE_SYM k1om_elf64_vec
6856 #undef TARGET_LITTLE_NAME
6857 #define TARGET_LITTLE_NAME "elf64-k1om"
6859 #define ELF_ARCH bfd_arch_k1om
6861 #undef ELF_MACHINE_CODE
6862 #define ELF_MACHINE_CODE EM_K1OM
6867 #define elf64_bed elf64_k1om_bed
6869 #undef elf_backend_object_p
6870 #define elf_backend_object_p elf64_k1om_elf_object_p
6872 #undef elf_backend_static_tls_alignment
6874 #undef elf_backend_want_plt_sym
6875 #define elf_backend_want_plt_sym 0
6877 #include "elf64-target.h"
6879 /* FreeBSD K1OM support. */
6881 #undef TARGET_LITTLE_SYM
6882 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6883 #undef TARGET_LITTLE_NAME
6884 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6887 #define ELF_OSABI ELFOSABI_FREEBSD
6890 #define elf64_bed elf64_k1om_fbsd_bed
6892 #include "elf64-target.h"
6894 /* 32bit x86-64 support. */
6896 #undef TARGET_LITTLE_SYM
6897 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6898 #undef TARGET_LITTLE_NAME
6899 #define TARGET_LITTLE_NAME "elf32-x86-64"
6903 #define ELF_ARCH bfd_arch_i386
6905 #undef ELF_MACHINE_CODE
6906 #define ELF_MACHINE_CODE EM_X86_64
6910 #undef elf_backend_object_p
6911 #define elf_backend_object_p \
6912 elf32_x86_64_elf_object_p
6914 #undef elf_backend_bfd_from_remote_memory
6915 #define elf_backend_bfd_from_remote_memory \
6916 _bfd_elf32_bfd_from_remote_memory
6918 #undef elf_backend_size_info
6919 #define elf_backend_size_info \
6920 _bfd_elf32_size_info
6922 #include "elf32-target.h"