1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2015 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. */
28 #include "bfd_stdint.h"
32 #include "libiberty.h"
34 #include "elf/x86-64.h"
41 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
42 #define MINUS_ONE (~ (bfd_vma) 0)
44 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
45 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
46 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
47 since they are the same. */
49 #define ABI_64_P(abfd) \
50 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
52 /* The relocation "howto" table. Order of fields:
53 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
54 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
55 static reloc_howto_type x86_64_elf_howto_table
[] =
57 HOWTO(R_X86_64_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
58 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
60 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
61 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
63 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
64 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
66 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
67 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
69 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
70 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
72 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
73 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
75 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
76 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
78 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
79 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
81 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
84 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
85 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
87 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
88 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
90 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
91 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
93 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
95 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
97 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
99 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
100 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
101 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
104 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
105 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
107 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
110 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
111 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
113 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
114 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
116 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
117 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
119 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
120 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
122 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
123 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
125 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
128 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
130 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
131 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
132 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
133 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
134 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
135 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
137 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
138 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
140 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
141 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
142 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
143 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
144 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
146 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
147 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
149 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
150 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", FALSE
, 0xffffffff, 0xffffffff,
152 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, FALSE
, 0, complain_overflow_unsigned
,
153 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", FALSE
, MINUS_ONE
, MINUS_ONE
,
155 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
156 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
157 "R_X86_64_GOTPC32_TLSDESC",
158 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
159 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
160 complain_overflow_dont
, bfd_elf_generic_reloc
,
161 "R_X86_64_TLSDESC_CALL",
163 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
164 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
166 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
167 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
168 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
170 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
171 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
173 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
174 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", FALSE
, 0xffffffff, 0xffffffff,
176 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
177 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", FALSE
, 0xffffffff, 0xffffffff,
180 /* We have a gap in the reloc numbers here.
181 R_X86_64_standard counts the number up to this point, and
182 R_X86_64_vt_offset is the value to subtract from a reloc type of
183 R_X86_64_GNU_VT* to form an index into this table. */
184 #define R_X86_64_standard (R_X86_64_PLT32_BND + 1)
185 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
187 /* GNU extension to record C++ vtable hierarchy. */
188 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
189 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
191 /* GNU extension to record C++ vtable member usage. */
192 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
193 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
196 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
197 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
198 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
202 #define IS_X86_64_PCREL_TYPE(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
206 || ((TYPE) == R_X86_64_PC32_BND) \
207 || ((TYPE) == R_X86_64_PC64))
209 /* Map BFD relocs to the x86_64 elf relocs. */
212 bfd_reloc_code_real_type bfd_reloc_val
;
213 unsigned char elf_reloc_val
;
216 static const struct elf_reloc_map x86_64_reloc_map
[] =
218 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
219 { BFD_RELOC_64
, R_X86_64_64
, },
220 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
221 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
222 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
223 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
224 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
225 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
226 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
227 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
228 { BFD_RELOC_32
, R_X86_64_32
, },
229 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
230 { BFD_RELOC_16
, R_X86_64_16
, },
231 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
232 { BFD_RELOC_8
, R_X86_64_8
, },
233 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
234 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
235 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
236 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
237 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
238 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
239 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
240 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
241 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
242 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
243 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
244 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
245 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
246 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
247 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
248 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
249 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
250 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
251 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
252 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
253 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
254 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
255 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
256 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
,},
257 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
,},
258 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
259 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
262 static reloc_howto_type
*
263 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
267 if (r_type
== (unsigned int) R_X86_64_32
)
272 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
274 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
275 || r_type
>= (unsigned int) R_X86_64_max
)
277 if (r_type
>= (unsigned int) R_X86_64_standard
)
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 name of the dynamic interpreter. This is put in the .interp
524 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
525 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
527 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
531 #define ELIMINATE_COPY_RELOCS 1
533 /* The size in bytes of an entry in the global offset table. */
535 #define GOT_ENTRY_SIZE 8
537 /* The size in bytes of an entry in the procedure linkage table. */
539 #define PLT_ENTRY_SIZE 16
541 /* The first entry in a procedure linkage table looks like this. See the
542 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
544 static const bfd_byte elf_x86_64_plt0_entry
[PLT_ENTRY_SIZE
] =
546 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
547 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
548 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
551 /* Subsequent entries in a procedure linkage table look like this. */
553 static const bfd_byte elf_x86_64_plt_entry
[PLT_ENTRY_SIZE
] =
555 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
556 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
557 0x68, /* pushq immediate */
558 0, 0, 0, 0, /* replaced with index into relocation table. */
559 0xe9, /* jmp relative */
560 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
563 /* The first entry in a procedure linkage table with BND relocations
566 static const bfd_byte elf_x86_64_bnd_plt0_entry
[PLT_ENTRY_SIZE
] =
568 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
569 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
570 0x0f, 0x1f, 0 /* nopl (%rax) */
573 /* Subsequent entries for legacy branches in a procedure linkage table
574 with BND relocations look like this. */
576 static const bfd_byte elf_x86_64_legacy_plt_entry
[PLT_ENTRY_SIZE
] =
578 0x68, 0, 0, 0, 0, /* pushq immediate */
579 0xe9, 0, 0, 0, 0, /* jmpq relative */
580 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
583 /* Subsequent entries for branches with BND prefx in a procedure linkage
584 table with BND relocations look like this. */
586 static const bfd_byte elf_x86_64_bnd_plt_entry
[PLT_ENTRY_SIZE
] =
588 0x68, 0, 0, 0, 0, /* pushq immediate */
589 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
590 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
593 /* Entries for legacy branches in the second procedure linkage table
596 static const bfd_byte elf_x86_64_legacy_plt2_entry
[8] =
598 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
599 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries for branches with BND prefix in the second procedure linkage
604 table look like this. */
606 static const bfd_byte elf_x86_64_bnd_plt2_entry
[8] =
608 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
609 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
613 /* .eh_frame covering the .plt section. */
615 static const bfd_byte elf_x86_64_eh_frame_plt
[] =
617 #define PLT_CIE_LENGTH 20
618 #define PLT_FDE_LENGTH 36
619 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
620 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
621 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
622 0, 0, 0, 0, /* CIE ID */
624 'z', 'R', 0, /* Augmentation string */
625 1, /* Code alignment factor */
626 0x78, /* Data alignment factor */
627 16, /* Return address column */
628 1, /* Augmentation size */
629 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
630 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
631 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
632 DW_CFA_nop
, DW_CFA_nop
,
634 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
635 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
636 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
637 0, 0, 0, 0, /* .plt size goes here */
638 0, /* Augmentation size */
639 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
640 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
641 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
642 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
643 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
644 11, /* Block length */
645 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
646 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
647 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
648 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
649 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
652 /* Architecture-specific backend data for x86-64. */
654 struct elf_x86_64_backend_data
656 /* Templates for the initial PLT entry and for subsequent entries. */
657 const bfd_byte
*plt0_entry
;
658 const bfd_byte
*plt_entry
;
659 unsigned int plt_entry_size
; /* Size of each PLT entry. */
661 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
662 unsigned int plt0_got1_offset
;
663 unsigned int plt0_got2_offset
;
665 /* Offset of the end of the PC-relative instruction containing
667 unsigned int plt0_got2_insn_end
;
669 /* Offsets into plt_entry that are to be replaced with... */
670 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
671 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
672 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
674 /* Length of the PC-relative instruction containing plt_got_offset. */
675 unsigned int plt_got_insn_size
;
677 /* Offset of the end of the PC-relative jump to plt0_entry. */
678 unsigned int plt_plt_insn_end
;
680 /* Offset into plt_entry where the initial value of the GOT entry points. */
681 unsigned int plt_lazy_offset
;
683 /* .eh_frame covering the .plt section. */
684 const bfd_byte
*eh_frame_plt
;
685 unsigned int eh_frame_plt_size
;
688 #define get_elf_x86_64_arch_data(bed) \
689 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
691 #define get_elf_x86_64_backend_data(abfd) \
692 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
694 #define GET_PLT_ENTRY_SIZE(abfd) \
695 get_elf_x86_64_backend_data (abfd)->plt_entry_size
697 /* These are the standard parameters. */
698 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
700 elf_x86_64_plt0_entry
, /* plt0_entry */
701 elf_x86_64_plt_entry
, /* plt_entry */
702 sizeof (elf_x86_64_plt_entry
), /* plt_entry_size */
703 2, /* plt0_got1_offset */
704 8, /* plt0_got2_offset */
705 12, /* plt0_got2_insn_end */
706 2, /* plt_got_offset */
707 7, /* plt_reloc_offset */
708 12, /* plt_plt_offset */
709 6, /* plt_got_insn_size */
710 PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
711 6, /* plt_lazy_offset */
712 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
713 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
716 static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed
=
718 elf_x86_64_bnd_plt0_entry
, /* plt0_entry */
719 elf_x86_64_bnd_plt_entry
, /* plt_entry */
720 sizeof (elf_x86_64_bnd_plt_entry
), /* plt_entry_size */
721 2, /* plt0_got1_offset */
722 1+8, /* plt0_got2_offset */
723 1+12, /* plt0_got2_insn_end */
724 1+2, /* plt_got_offset */
725 1, /* plt_reloc_offset */
726 7, /* plt_plt_offset */
727 1+6, /* plt_got_insn_size */
728 11, /* plt_plt_insn_end */
729 0, /* plt_lazy_offset */
730 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
731 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
734 #define elf_backend_arch_data &elf_x86_64_arch_bed
736 /* x86-64 ELF linker hash entry. */
738 struct elf_x86_64_link_hash_entry
740 struct elf_link_hash_entry elf
;
742 /* Track dynamic relocs copied for this symbol. */
743 struct elf_dyn_relocs
*dyn_relocs
;
745 #define GOT_UNKNOWN 0
749 #define GOT_TLS_GDESC 4
750 #define GOT_TLS_GD_BOTH_P(type) \
751 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
752 #define GOT_TLS_GD_P(type) \
753 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
754 #define GOT_TLS_GDESC_P(type) \
755 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
756 #define GOT_TLS_GD_ANY_P(type) \
757 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
758 unsigned char tls_type
;
760 /* TRUE if a weak symbol with a real definition needs a copy reloc.
761 When there is a weak symbol with a real definition, the processor
762 independent code will have arranged for us to see the real
763 definition first. We need to copy the needs_copy bit from the
764 real definition and check it when allowing copy reloc in PIE. */
765 unsigned int needs_copy
: 1;
767 /* TRUE if symbol has at least one BND relocation. */
768 unsigned int has_bnd_reloc
: 1;
770 /* Information about the GOT PLT entry. Filled when there are both
771 GOT and PLT relocations against the same function. */
772 union gotplt_union plt_got
;
774 /* Information about the second PLT entry. Filled when has_bnd_reloc is
776 union gotplt_union plt_bnd
;
778 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
779 starting at the end of the jump table. */
783 #define elf_x86_64_hash_entry(ent) \
784 ((struct elf_x86_64_link_hash_entry *)(ent))
786 struct elf_x86_64_obj_tdata
788 struct elf_obj_tdata root
;
790 /* tls_type for each local got entry. */
791 char *local_got_tls_type
;
793 /* GOTPLT entries for TLS descriptors. */
794 bfd_vma
*local_tlsdesc_gotent
;
797 #define elf_x86_64_tdata(abfd) \
798 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
800 #define elf_x86_64_local_got_tls_type(abfd) \
801 (elf_x86_64_tdata (abfd)->local_got_tls_type)
803 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
804 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
806 #define is_x86_64_elf(bfd) \
807 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
808 && elf_tdata (bfd) != NULL \
809 && elf_object_id (bfd) == X86_64_ELF_DATA)
812 elf_x86_64_mkobject (bfd
*abfd
)
814 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_x86_64_obj_tdata
),
818 /* x86-64 ELF linker hash table. */
820 struct elf_x86_64_link_hash_table
822 struct elf_link_hash_table elf
;
824 /* Short-cuts to get to dynamic linker sections. */
827 asection
*plt_eh_frame
;
833 bfd_signed_vma refcount
;
837 /* The amount of space used by the jump slots in the GOT. */
838 bfd_vma sgotplt_jump_table_size
;
840 /* Small local sym cache. */
841 struct sym_cache sym_cache
;
843 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
844 bfd_vma (*r_sym
) (bfd_vma
);
845 unsigned int pointer_r_type
;
846 const char *dynamic_interpreter
;
847 int dynamic_interpreter_size
;
849 /* _TLS_MODULE_BASE_ symbol. */
850 struct bfd_link_hash_entry
*tls_module_base
;
852 /* Used by local STT_GNU_IFUNC symbols. */
853 htab_t loc_hash_table
;
854 void * loc_hash_memory
;
856 /* The offset into splt of the PLT entry for the TLS descriptor
857 resolver. Special values are 0, if not necessary (or not found
858 to be necessary yet), and -1 if needed but not determined
861 /* The offset into sgot of the GOT entry used by the PLT entry
865 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
866 bfd_vma next_jump_slot_index
;
867 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
868 bfd_vma next_irelative_index
;
871 /* Get the x86-64 ELF linker hash table from a link_info structure. */
873 #define elf_x86_64_hash_table(p) \
874 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
875 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
877 #define elf_x86_64_compute_jump_table_size(htab) \
878 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
880 /* Create an entry in an x86-64 ELF linker hash table. */
882 static struct bfd_hash_entry
*
883 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
884 struct bfd_hash_table
*table
,
887 /* Allocate the structure if it has not already been allocated by a
891 entry
= (struct bfd_hash_entry
*)
892 bfd_hash_allocate (table
,
893 sizeof (struct elf_x86_64_link_hash_entry
));
898 /* Call the allocation method of the superclass. */
899 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
902 struct elf_x86_64_link_hash_entry
*eh
;
904 eh
= (struct elf_x86_64_link_hash_entry
*) entry
;
905 eh
->dyn_relocs
= NULL
;
906 eh
->tls_type
= GOT_UNKNOWN
;
908 eh
->has_bnd_reloc
= 0;
909 eh
->plt_bnd
.offset
= (bfd_vma
) -1;
910 eh
->plt_got
.offset
= (bfd_vma
) -1;
911 eh
->tlsdesc_got
= (bfd_vma
) -1;
917 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
918 for local symbol so that we can handle local STT_GNU_IFUNC symbols
919 as global symbol. We reuse indx and dynstr_index for local symbol
920 hash since they aren't used by global symbols in this backend. */
923 elf_x86_64_local_htab_hash (const void *ptr
)
925 struct elf_link_hash_entry
*h
926 = (struct elf_link_hash_entry
*) ptr
;
927 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
930 /* Compare local hash entries. */
933 elf_x86_64_local_htab_eq (const void *ptr1
, const void *ptr2
)
935 struct elf_link_hash_entry
*h1
936 = (struct elf_link_hash_entry
*) ptr1
;
937 struct elf_link_hash_entry
*h2
938 = (struct elf_link_hash_entry
*) ptr2
;
940 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
943 /* Find and/or create a hash entry for local symbol. */
945 static struct elf_link_hash_entry
*
946 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table
*htab
,
947 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
950 struct elf_x86_64_link_hash_entry e
, *ret
;
951 asection
*sec
= abfd
->sections
;
952 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
953 htab
->r_sym (rel
->r_info
));
956 e
.elf
.indx
= sec
->id
;
957 e
.elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
958 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
959 create
? INSERT
: NO_INSERT
);
966 ret
= (struct elf_x86_64_link_hash_entry
*) *slot
;
970 ret
= (struct elf_x86_64_link_hash_entry
*)
971 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
972 sizeof (struct elf_x86_64_link_hash_entry
));
975 memset (ret
, 0, sizeof (*ret
));
976 ret
->elf
.indx
= sec
->id
;
977 ret
->elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
978 ret
->elf
.dynindx
= -1;
979 ret
->plt_got
.offset
= (bfd_vma
) -1;
985 /* Destroy an X86-64 ELF linker hash table. */
988 elf_x86_64_link_hash_table_free (bfd
*obfd
)
990 struct elf_x86_64_link_hash_table
*htab
991 = (struct elf_x86_64_link_hash_table
*) obfd
->link
.hash
;
993 if (htab
->loc_hash_table
)
994 htab_delete (htab
->loc_hash_table
);
995 if (htab
->loc_hash_memory
)
996 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
997 _bfd_elf_link_hash_table_free (obfd
);
1000 /* Create an X86-64 ELF linker hash table. */
1002 static struct bfd_link_hash_table
*
1003 elf_x86_64_link_hash_table_create (bfd
*abfd
)
1005 struct elf_x86_64_link_hash_table
*ret
;
1006 bfd_size_type amt
= sizeof (struct elf_x86_64_link_hash_table
);
1008 ret
= (struct elf_x86_64_link_hash_table
*) bfd_zmalloc (amt
);
1012 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1013 elf_x86_64_link_hash_newfunc
,
1014 sizeof (struct elf_x86_64_link_hash_entry
),
1021 if (ABI_64_P (abfd
))
1023 ret
->r_info
= elf64_r_info
;
1024 ret
->r_sym
= elf64_r_sym
;
1025 ret
->pointer_r_type
= R_X86_64_64
;
1026 ret
->dynamic_interpreter
= ELF64_DYNAMIC_INTERPRETER
;
1027 ret
->dynamic_interpreter_size
= sizeof ELF64_DYNAMIC_INTERPRETER
;
1031 ret
->r_info
= elf32_r_info
;
1032 ret
->r_sym
= elf32_r_sym
;
1033 ret
->pointer_r_type
= R_X86_64_32
;
1034 ret
->dynamic_interpreter
= ELF32_DYNAMIC_INTERPRETER
;
1035 ret
->dynamic_interpreter_size
= sizeof ELF32_DYNAMIC_INTERPRETER
;
1038 ret
->loc_hash_table
= htab_try_create (1024,
1039 elf_x86_64_local_htab_hash
,
1040 elf_x86_64_local_htab_eq
,
1042 ret
->loc_hash_memory
= objalloc_create ();
1043 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1045 elf_x86_64_link_hash_table_free (abfd
);
1048 ret
->elf
.root
.hash_table_free
= elf_x86_64_link_hash_table_free
;
1050 return &ret
->elf
.root
;
1053 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1054 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1058 elf_x86_64_create_dynamic_sections (bfd
*dynobj
,
1059 struct bfd_link_info
*info
)
1061 struct elf_x86_64_link_hash_table
*htab
;
1063 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1066 htab
= elf_x86_64_hash_table (info
);
1070 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1074 if (info
->executable
)
1076 /* Always allow copy relocs for building executables. */
1077 asection
*s
= bfd_get_linker_section (dynobj
, ".rela.bss");
1080 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
1081 s
= bfd_make_section_anyway_with_flags (dynobj
,
1083 (bed
->dynamic_sec_flags
1086 || ! bfd_set_section_alignment (dynobj
, s
,
1087 bed
->s
->log_file_align
))
1093 if (!info
->no_ld_generated_unwind_info
1094 && htab
->plt_eh_frame
== NULL
1095 && htab
->elf
.splt
!= NULL
)
1097 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1098 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1099 | SEC_LINKER_CREATED
);
1101 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1102 if (htab
->plt_eh_frame
== NULL
1103 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 3))
1109 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1112 elf_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
1113 struct elf_link_hash_entry
*dir
,
1114 struct elf_link_hash_entry
*ind
)
1116 struct elf_x86_64_link_hash_entry
*edir
, *eind
;
1118 edir
= (struct elf_x86_64_link_hash_entry
*) dir
;
1119 eind
= (struct elf_x86_64_link_hash_entry
*) ind
;
1121 if (!edir
->has_bnd_reloc
)
1122 edir
->has_bnd_reloc
= eind
->has_bnd_reloc
;
1124 if (eind
->dyn_relocs
!= NULL
)
1126 if (edir
->dyn_relocs
!= NULL
)
1128 struct elf_dyn_relocs
**pp
;
1129 struct elf_dyn_relocs
*p
;
1131 /* Add reloc counts against the indirect sym to the direct sym
1132 list. Merge any entries against the same section. */
1133 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1135 struct elf_dyn_relocs
*q
;
1137 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1138 if (q
->sec
== p
->sec
)
1140 q
->pc_count
+= p
->pc_count
;
1141 q
->count
+= p
->count
;
1148 *pp
= edir
->dyn_relocs
;
1151 edir
->dyn_relocs
= eind
->dyn_relocs
;
1152 eind
->dyn_relocs
= NULL
;
1155 if (ind
->root
.type
== bfd_link_hash_indirect
1156 && dir
->got
.refcount
<= 0)
1158 edir
->tls_type
= eind
->tls_type
;
1159 eind
->tls_type
= GOT_UNKNOWN
;
1162 if (ELIMINATE_COPY_RELOCS
1163 && ind
->root
.type
!= bfd_link_hash_indirect
1164 && dir
->dynamic_adjusted
)
1166 /* If called to transfer flags for a weakdef during processing
1167 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1168 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1169 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1170 dir
->ref_regular
|= ind
->ref_regular
;
1171 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1172 dir
->needs_plt
|= ind
->needs_plt
;
1173 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1176 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1180 elf64_x86_64_elf_object_p (bfd
*abfd
)
1182 /* Set the right machine number for an x86-64 elf64 file. */
1183 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1188 elf32_x86_64_elf_object_p (bfd
*abfd
)
1190 /* Set the right machine number for an x86-64 elf32 file. */
1191 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1195 /* Return TRUE if the TLS access code sequence support transition
1199 elf_x86_64_check_tls_transition (bfd
*abfd
,
1200 struct bfd_link_info
*info
,
1203 Elf_Internal_Shdr
*symtab_hdr
,
1204 struct elf_link_hash_entry
**sym_hashes
,
1205 unsigned int r_type
,
1206 const Elf_Internal_Rela
*rel
,
1207 const Elf_Internal_Rela
*relend
)
1210 unsigned long r_symndx
;
1211 bfd_boolean largepic
= FALSE
;
1212 struct elf_link_hash_entry
*h
;
1214 struct elf_x86_64_link_hash_table
*htab
;
1216 /* Get the section contents. */
1217 if (contents
== NULL
)
1219 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1220 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1223 /* FIXME: How to better handle error condition? */
1224 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1227 /* Cache the section contents for elf_link_input_bfd. */
1228 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1232 htab
= elf_x86_64_hash_table (info
);
1233 offset
= rel
->r_offset
;
1236 case R_X86_64_TLSGD
:
1237 case R_X86_64_TLSLD
:
1238 if ((rel
+ 1) >= relend
)
1241 if (r_type
== R_X86_64_TLSGD
)
1243 /* Check transition from GD access model. For 64bit, only
1244 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1245 .word 0x6666; rex64; call __tls_get_addr
1246 can transit to different access model. For 32bit, only
1247 leaq foo@tlsgd(%rip), %rdi
1248 .word 0x6666; rex64; call __tls_get_addr
1249 can transit to different access model. For largepic
1251 leaq foo@tlsgd(%rip), %rdi
1252 movabsq $__tls_get_addr@pltoff, %rax
1256 static const unsigned char call
[] = { 0x66, 0x66, 0x48, 0xe8 };
1257 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1259 if ((offset
+ 12) > sec
->size
)
1262 if (memcmp (contents
+ offset
+ 4, call
, 4) != 0)
1264 if (!ABI_64_P (abfd
)
1265 || (offset
+ 19) > sec
->size
1267 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0
1268 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1269 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1274 else if (ABI_64_P (abfd
))
1277 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1283 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1289 /* Check transition from LD access model. Only
1290 leaq foo@tlsld(%rip), %rdi;
1292 can transit to different access model. For largepic
1294 leaq foo@tlsld(%rip), %rdi
1295 movabsq $__tls_get_addr@pltoff, %rax
1299 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1301 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1304 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1307 if (0xe8 != *(contents
+ offset
+ 4))
1309 if (!ABI_64_P (abfd
)
1310 || (offset
+ 19) > sec
->size
1311 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1312 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1319 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1320 if (r_symndx
< symtab_hdr
->sh_info
)
1323 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1324 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1325 may be versioned. */
1327 && h
->root
.root
.string
!= NULL
1329 ? ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLTOFF64
1330 : (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1331 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
))
1332 && (strncmp (h
->root
.root
.string
,
1333 "__tls_get_addr", 14) == 0));
1335 case R_X86_64_GOTTPOFF
:
1336 /* Check transition from IE access model:
1337 mov foo@gottpoff(%rip), %reg
1338 add foo@gottpoff(%rip), %reg
1341 /* Check REX prefix first. */
1342 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1344 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1345 if (val
!= 0x48 && val
!= 0x4c)
1347 /* X32 may have 0x44 REX prefix or no REX prefix. */
1348 if (ABI_64_P (abfd
))
1354 /* X32 may not have any REX prefix. */
1355 if (ABI_64_P (abfd
))
1357 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1361 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1362 if (val
!= 0x8b && val
!= 0x03)
1365 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1366 return (val
& 0xc7) == 5;
1368 case R_X86_64_GOTPC32_TLSDESC
:
1369 /* Check transition from GDesc access model:
1370 leaq x@tlsdesc(%rip), %rax
1372 Make sure it's a leaq adding rip to a 32-bit offset
1373 into any register, although it's probably almost always
1376 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1379 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1380 if ((val
& 0xfb) != 0x48)
1383 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1386 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1387 return (val
& 0xc7) == 0x05;
1389 case R_X86_64_TLSDESC_CALL
:
1390 /* Check transition from GDesc access model:
1391 call *x@tlsdesc(%rax)
1393 if (offset
+ 2 <= sec
->size
)
1395 /* Make sure that it's a call *x@tlsdesc(%rax). */
1396 static const unsigned char call
[] = { 0xff, 0x10 };
1397 return memcmp (contents
+ offset
, call
, 2) == 0;
1407 /* Return TRUE if the TLS access transition is OK or no transition
1408 will be performed. Update R_TYPE if there is a transition. */
1411 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1412 asection
*sec
, bfd_byte
*contents
,
1413 Elf_Internal_Shdr
*symtab_hdr
,
1414 struct elf_link_hash_entry
**sym_hashes
,
1415 unsigned int *r_type
, int tls_type
,
1416 const Elf_Internal_Rela
*rel
,
1417 const Elf_Internal_Rela
*relend
,
1418 struct elf_link_hash_entry
*h
,
1419 unsigned long r_symndx
)
1421 unsigned int from_type
= *r_type
;
1422 unsigned int to_type
= from_type
;
1423 bfd_boolean check
= TRUE
;
1425 /* Skip TLS transition for functions. */
1427 && (h
->type
== STT_FUNC
1428 || h
->type
== STT_GNU_IFUNC
))
1433 case R_X86_64_TLSGD
:
1434 case R_X86_64_GOTPC32_TLSDESC
:
1435 case R_X86_64_TLSDESC_CALL
:
1436 case R_X86_64_GOTTPOFF
:
1437 if (info
->executable
)
1440 to_type
= R_X86_64_TPOFF32
;
1442 to_type
= R_X86_64_GOTTPOFF
;
1445 /* When we are called from elf_x86_64_relocate_section,
1446 CONTENTS isn't NULL and there may be additional transitions
1447 based on TLS_TYPE. */
1448 if (contents
!= NULL
)
1450 unsigned int new_to_type
= to_type
;
1452 if (info
->executable
1455 && tls_type
== GOT_TLS_IE
)
1456 new_to_type
= R_X86_64_TPOFF32
;
1458 if (to_type
== R_X86_64_TLSGD
1459 || to_type
== R_X86_64_GOTPC32_TLSDESC
1460 || to_type
== R_X86_64_TLSDESC_CALL
)
1462 if (tls_type
== GOT_TLS_IE
)
1463 new_to_type
= R_X86_64_GOTTPOFF
;
1466 /* We checked the transition before when we were called from
1467 elf_x86_64_check_relocs. We only want to check the new
1468 transition which hasn't been checked before. */
1469 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1470 to_type
= new_to_type
;
1475 case R_X86_64_TLSLD
:
1476 if (info
->executable
)
1477 to_type
= R_X86_64_TPOFF32
;
1484 /* Return TRUE if there is no transition. */
1485 if (from_type
== to_type
)
1488 /* Check if the transition can be performed. */
1490 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1491 symtab_hdr
, sym_hashes
,
1492 from_type
, rel
, relend
))
1494 reloc_howto_type
*from
, *to
;
1497 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1498 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1501 name
= h
->root
.root
.string
;
1504 struct elf_x86_64_link_hash_table
*htab
;
1506 htab
= elf_x86_64_hash_table (info
);
1511 Elf_Internal_Sym
*isym
;
1513 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1515 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1519 (*_bfd_error_handler
)
1520 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1521 "in section `%A' failed"),
1522 abfd
, sec
, from
->name
, to
->name
, name
,
1523 (unsigned long) rel
->r_offset
);
1524 bfd_set_error (bfd_error_bad_value
);
1532 /* Rename some of the generic section flags to better document how they
1534 #define need_convert_mov_to_lea sec_flg0
1536 /* Look through the relocs for a section during the first phase, and
1537 calculate needed space in the global offset table, procedure
1538 linkage table, and dynamic reloc sections. */
1541 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1543 const Elf_Internal_Rela
*relocs
)
1545 struct elf_x86_64_link_hash_table
*htab
;
1546 Elf_Internal_Shdr
*symtab_hdr
;
1547 struct elf_link_hash_entry
**sym_hashes
;
1548 const Elf_Internal_Rela
*rel
;
1549 const Elf_Internal_Rela
*rel_end
;
1551 bfd_boolean use_plt_got
;
1553 if (info
->relocatable
)
1556 BFD_ASSERT (is_x86_64_elf (abfd
));
1558 htab
= elf_x86_64_hash_table (info
);
1562 use_plt_got
= get_elf_x86_64_backend_data (abfd
) == &elf_x86_64_arch_bed
;
1564 symtab_hdr
= &elf_symtab_hdr (abfd
);
1565 sym_hashes
= elf_sym_hashes (abfd
);
1569 rel_end
= relocs
+ sec
->reloc_count
;
1570 for (rel
= relocs
; rel
< rel_end
; rel
++)
1572 unsigned int r_type
;
1573 unsigned long r_symndx
;
1574 struct elf_link_hash_entry
*h
;
1575 Elf_Internal_Sym
*isym
;
1577 bfd_boolean size_reloc
;
1579 r_symndx
= htab
->r_sym (rel
->r_info
);
1580 r_type
= ELF32_R_TYPE (rel
->r_info
);
1582 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1584 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1589 if (r_symndx
< symtab_hdr
->sh_info
)
1591 /* A local symbol. */
1592 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1597 /* Check relocation against local STT_GNU_IFUNC symbol. */
1598 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1600 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
,
1605 /* Fake a STT_GNU_IFUNC symbol. */
1606 h
->type
= STT_GNU_IFUNC
;
1609 h
->forced_local
= 1;
1610 h
->root
.type
= bfd_link_hash_defined
;
1618 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1619 while (h
->root
.type
== bfd_link_hash_indirect
1620 || h
->root
.type
== bfd_link_hash_warning
)
1621 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1624 /* Check invalid x32 relocations. */
1625 if (!ABI_64_P (abfd
))
1631 case R_X86_64_DTPOFF64
:
1632 case R_X86_64_TPOFF64
:
1634 case R_X86_64_GOTOFF64
:
1635 case R_X86_64_GOT64
:
1636 case R_X86_64_GOTPCREL64
:
1637 case R_X86_64_GOTPC64
:
1638 case R_X86_64_GOTPLT64
:
1639 case R_X86_64_PLTOFF64
:
1642 name
= h
->root
.root
.string
;
1644 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1646 (*_bfd_error_handler
)
1647 (_("%B: relocation %s against symbol `%s' isn't "
1648 "supported in x32 mode"), abfd
,
1649 x86_64_elf_howto_table
[r_type
].name
, name
);
1650 bfd_set_error (bfd_error_bad_value
);
1658 /* Create the ifunc sections for static executables. If we
1659 never see an indirect function symbol nor we are building
1660 a static executable, those sections will be empty and
1661 won't appear in output. */
1667 case R_X86_64_PC32_BND
:
1668 case R_X86_64_PLT32_BND
:
1670 case R_X86_64_PLT32
:
1673 /* MPX PLT is supported only if elf_x86_64_arch_bed
1674 is used in 64-bit mode. */
1677 && (get_elf_x86_64_backend_data (abfd
)
1678 == &elf_x86_64_arch_bed
))
1680 elf_x86_64_hash_entry (h
)->has_bnd_reloc
= 1;
1682 /* Create the second PLT for Intel MPX support. */
1683 if (htab
->plt_bnd
== NULL
)
1685 unsigned int plt_bnd_align
;
1686 const struct elf_backend_data
*bed
;
1688 bed
= get_elf_backend_data (info
->output_bfd
);
1689 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry
) == 8
1690 && (sizeof (elf_x86_64_bnd_plt2_entry
)
1691 == sizeof (elf_x86_64_legacy_plt2_entry
)));
1694 if (htab
->elf
.dynobj
== NULL
)
1695 htab
->elf
.dynobj
= abfd
;
1697 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1699 (bed
->dynamic_sec_flags
1704 if (htab
->plt_bnd
== NULL
1705 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1714 case R_X86_64_GOTPCREL
:
1715 case R_X86_64_GOTPCREL64
:
1716 if (htab
->elf
.dynobj
== NULL
)
1717 htab
->elf
.dynobj
= abfd
;
1718 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1723 /* It is referenced by a non-shared object. */
1725 h
->root
.non_ir_ref
= 1;
1728 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1729 symtab_hdr
, sym_hashes
,
1730 &r_type
, GOT_UNKNOWN
,
1731 rel
, rel_end
, h
, r_symndx
))
1736 case R_X86_64_TLSLD
:
1737 htab
->tls_ld_got
.refcount
+= 1;
1740 case R_X86_64_TPOFF32
:
1741 if (!info
->executable
&& ABI_64_P (abfd
))
1744 name
= h
->root
.root
.string
;
1746 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1748 (*_bfd_error_handler
)
1749 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1751 x86_64_elf_howto_table
[r_type
].name
, name
);
1752 bfd_set_error (bfd_error_bad_value
);
1757 case R_X86_64_GOTTPOFF
:
1758 if (!info
->executable
)
1759 info
->flags
|= DF_STATIC_TLS
;
1762 case R_X86_64_GOT32
:
1763 case R_X86_64_GOTPCREL
:
1764 case R_X86_64_TLSGD
:
1765 case R_X86_64_GOT64
:
1766 case R_X86_64_GOTPCREL64
:
1767 case R_X86_64_GOTPLT64
:
1768 case R_X86_64_GOTPC32_TLSDESC
:
1769 case R_X86_64_TLSDESC_CALL
:
1770 /* This symbol requires a global offset table entry. */
1772 int tls_type
, old_tls_type
;
1776 default: tls_type
= GOT_NORMAL
; break;
1777 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1778 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1779 case R_X86_64_GOTPC32_TLSDESC
:
1780 case R_X86_64_TLSDESC_CALL
:
1781 tls_type
= GOT_TLS_GDESC
; break;
1786 h
->got
.refcount
+= 1;
1787 old_tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
1791 bfd_signed_vma
*local_got_refcounts
;
1793 /* This is a global offset table entry for a local symbol. */
1794 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1795 if (local_got_refcounts
== NULL
)
1799 size
= symtab_hdr
->sh_info
;
1800 size
*= sizeof (bfd_signed_vma
)
1801 + sizeof (bfd_vma
) + sizeof (char);
1802 local_got_refcounts
= ((bfd_signed_vma
*)
1803 bfd_zalloc (abfd
, size
));
1804 if (local_got_refcounts
== NULL
)
1806 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1807 elf_x86_64_local_tlsdesc_gotent (abfd
)
1808 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1809 elf_x86_64_local_got_tls_type (abfd
)
1810 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1812 local_got_refcounts
[r_symndx
] += 1;
1814 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1817 /* If a TLS symbol is accessed using IE at least once,
1818 there is no point to use dynamic model for it. */
1819 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1820 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1821 || tls_type
!= GOT_TLS_IE
))
1823 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1824 tls_type
= old_tls_type
;
1825 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1826 && GOT_TLS_GD_ANY_P (tls_type
))
1827 tls_type
|= old_tls_type
;
1831 name
= h
->root
.root
.string
;
1833 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1835 (*_bfd_error_handler
)
1836 (_("%B: '%s' accessed both as normal and thread local symbol"),
1838 bfd_set_error (bfd_error_bad_value
);
1843 if (old_tls_type
!= tls_type
)
1846 elf_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1848 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1853 case R_X86_64_GOTOFF64
:
1854 case R_X86_64_GOTPC32
:
1855 case R_X86_64_GOTPC64
:
1857 if (htab
->elf
.sgot
== NULL
)
1859 if (htab
->elf
.dynobj
== NULL
)
1860 htab
->elf
.dynobj
= abfd
;
1861 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1867 case R_X86_64_PLT32
:
1868 case R_X86_64_PLT32_BND
:
1869 /* This symbol requires a procedure linkage table entry. We
1870 actually build the entry in adjust_dynamic_symbol,
1871 because this might be a case of linking PIC code which is
1872 never referenced by a dynamic object, in which case we
1873 don't need to generate a procedure linkage table entry
1876 /* If this is a local symbol, we resolve it directly without
1877 creating a procedure linkage table entry. */
1882 h
->plt
.refcount
+= 1;
1885 case R_X86_64_PLTOFF64
:
1886 /* This tries to form the 'address' of a function relative
1887 to GOT. For global symbols we need a PLT entry. */
1891 h
->plt
.refcount
+= 1;
1895 case R_X86_64_SIZE32
:
1896 case R_X86_64_SIZE64
:
1901 if (!ABI_64_P (abfd
))
1906 /* Let's help debug shared library creation. These relocs
1907 cannot be used in shared libs. Don't error out for
1908 sections we don't care about, such as debug sections or
1909 non-constant sections. */
1911 && (sec
->flags
& SEC_ALLOC
) != 0
1912 && (sec
->flags
& SEC_READONLY
) != 0)
1915 name
= h
->root
.root
.string
;
1917 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1918 (*_bfd_error_handler
)
1919 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1920 abfd
, x86_64_elf_howto_table
[r_type
].name
, name
);
1921 bfd_set_error (bfd_error_bad_value
);
1929 case R_X86_64_PC32_BND
:
1933 if (h
!= NULL
&& info
->executable
)
1935 /* If this reloc is in a read-only section, we might
1936 need a copy reloc. We can't check reliably at this
1937 stage whether the section is read-only, as input
1938 sections have not yet been mapped to output sections.
1939 Tentatively set the flag for now, and correct in
1940 adjust_dynamic_symbol. */
1943 /* We may need a .plt entry if the function this reloc
1944 refers to is in a shared lib. */
1945 h
->plt
.refcount
+= 1;
1946 if (r_type
!= R_X86_64_PC32
1947 && r_type
!= R_X86_64_PC32_BND
1948 && r_type
!= R_X86_64_PC64
)
1949 h
->pointer_equality_needed
= 1;
1954 /* If we are creating a shared library, and this is a reloc
1955 against a global symbol, or a non PC relative reloc
1956 against a local symbol, then we need to copy the reloc
1957 into the shared library. However, if we are linking with
1958 -Bsymbolic, we do not need to copy a reloc against a
1959 global symbol which is defined in an object we are
1960 including in the link (i.e., DEF_REGULAR is set). At
1961 this point we have not seen all the input files, so it is
1962 possible that DEF_REGULAR is not set now but will be set
1963 later (it is never cleared). In case of a weak definition,
1964 DEF_REGULAR may be cleared later by a strong definition in
1965 a shared library. We account for that possibility below by
1966 storing information in the relocs_copied field of the hash
1967 table entry. A similar situation occurs when creating
1968 shared libraries and symbol visibility changes render the
1971 If on the other hand, we are creating an executable, we
1972 may need to keep relocations for symbols satisfied by a
1973 dynamic library if we manage to avoid copy relocs for the
1976 && (sec
->flags
& SEC_ALLOC
) != 0
1977 && (! IS_X86_64_PCREL_TYPE (r_type
)
1979 && (! SYMBOLIC_BIND (info
, h
)
1980 || h
->root
.type
== bfd_link_hash_defweak
1981 || !h
->def_regular
))))
1982 || (ELIMINATE_COPY_RELOCS
1984 && (sec
->flags
& SEC_ALLOC
) != 0
1986 && (h
->root
.type
== bfd_link_hash_defweak
1987 || !h
->def_regular
)))
1989 struct elf_dyn_relocs
*p
;
1990 struct elf_dyn_relocs
**head
;
1992 /* We must copy these reloc types into the output file.
1993 Create a reloc section in dynobj and make room for
1997 if (htab
->elf
.dynobj
== NULL
)
1998 htab
->elf
.dynobj
= abfd
;
2000 sreloc
= _bfd_elf_make_dynamic_reloc_section
2001 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2002 abfd
, /*rela?*/ TRUE
);
2008 /* If this is a global symbol, we count the number of
2009 relocations we need for this symbol. */
2012 head
= &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
2016 /* Track dynamic relocs needed for local syms too.
2017 We really need local syms available to do this
2022 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2027 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2031 /* Beware of type punned pointers vs strict aliasing
2033 vpp
= &(elf_section_data (s
)->local_dynrel
);
2034 head
= (struct elf_dyn_relocs
**)vpp
;
2038 if (p
== NULL
|| p
->sec
!= sec
)
2040 bfd_size_type amt
= sizeof *p
;
2042 p
= ((struct elf_dyn_relocs
*)
2043 bfd_alloc (htab
->elf
.dynobj
, amt
));
2054 /* Count size relocation as PC-relative relocation. */
2055 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
2060 /* This relocation describes the C++ object vtable hierarchy.
2061 Reconstruct it for later use during GC. */
2062 case R_X86_64_GNU_VTINHERIT
:
2063 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2067 /* This relocation describes which C++ vtable entries are actually
2068 used. Record for later use during GC. */
2069 case R_X86_64_GNU_VTENTRY
:
2070 BFD_ASSERT (h
!= NULL
);
2072 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2082 && h
->plt
.refcount
> 0
2083 && (((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2084 || h
->got
.refcount
> 0)
2085 && htab
->plt_got
== NULL
)
2087 /* Create the GOT procedure linkage table. */
2088 unsigned int plt_got_align
;
2089 const struct elf_backend_data
*bed
;
2091 bed
= get_elf_backend_data (info
->output_bfd
);
2092 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry
) == 8
2093 && (sizeof (elf_x86_64_bnd_plt2_entry
)
2094 == sizeof (elf_x86_64_legacy_plt2_entry
)));
2097 if (htab
->elf
.dynobj
== NULL
)
2098 htab
->elf
.dynobj
= abfd
;
2100 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
2102 (bed
->dynamic_sec_flags
2107 if (htab
->plt_got
== NULL
2108 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
2114 if (r_type
== R_X86_64_GOTPCREL
2115 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2116 sec
->need_convert_mov_to_lea
= 1;
2122 /* Return the section that should be marked against GC for a given
2126 elf_x86_64_gc_mark_hook (asection
*sec
,
2127 struct bfd_link_info
*info
,
2128 Elf_Internal_Rela
*rel
,
2129 struct elf_link_hash_entry
*h
,
2130 Elf_Internal_Sym
*sym
)
2133 switch (ELF32_R_TYPE (rel
->r_info
))
2135 case R_X86_64_GNU_VTINHERIT
:
2136 case R_X86_64_GNU_VTENTRY
:
2140 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2143 /* Update the got entry reference counts for the section being removed. */
2146 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
2148 const Elf_Internal_Rela
*relocs
)
2150 struct elf_x86_64_link_hash_table
*htab
;
2151 Elf_Internal_Shdr
*symtab_hdr
;
2152 struct elf_link_hash_entry
**sym_hashes
;
2153 bfd_signed_vma
*local_got_refcounts
;
2154 const Elf_Internal_Rela
*rel
, *relend
;
2156 if (info
->relocatable
)
2159 htab
= elf_x86_64_hash_table (info
);
2163 elf_section_data (sec
)->local_dynrel
= NULL
;
2165 symtab_hdr
= &elf_symtab_hdr (abfd
);
2166 sym_hashes
= elf_sym_hashes (abfd
);
2167 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2169 htab
= elf_x86_64_hash_table (info
);
2170 relend
= relocs
+ sec
->reloc_count
;
2171 for (rel
= relocs
; rel
< relend
; rel
++)
2173 unsigned long r_symndx
;
2174 unsigned int r_type
;
2175 struct elf_link_hash_entry
*h
= NULL
;
2177 r_symndx
= htab
->r_sym (rel
->r_info
);
2178 if (r_symndx
>= symtab_hdr
->sh_info
)
2180 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2181 while (h
->root
.type
== bfd_link_hash_indirect
2182 || h
->root
.type
== bfd_link_hash_warning
)
2183 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2187 /* A local symbol. */
2188 Elf_Internal_Sym
*isym
;
2190 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2193 /* Check relocation against local STT_GNU_IFUNC symbol. */
2195 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2197 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2205 struct elf_x86_64_link_hash_entry
*eh
;
2206 struct elf_dyn_relocs
**pp
;
2207 struct elf_dyn_relocs
*p
;
2209 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2211 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2214 /* Everything must go for SEC. */
2220 r_type
= ELF32_R_TYPE (rel
->r_info
);
2221 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
2222 symtab_hdr
, sym_hashes
,
2223 &r_type
, GOT_UNKNOWN
,
2224 rel
, relend
, h
, r_symndx
))
2229 case R_X86_64_TLSLD
:
2230 if (htab
->tls_ld_got
.refcount
> 0)
2231 htab
->tls_ld_got
.refcount
-= 1;
2234 case R_X86_64_TLSGD
:
2235 case R_X86_64_GOTPC32_TLSDESC
:
2236 case R_X86_64_TLSDESC_CALL
:
2237 case R_X86_64_GOTTPOFF
:
2238 case R_X86_64_GOT32
:
2239 case R_X86_64_GOTPCREL
:
2240 case R_X86_64_GOT64
:
2241 case R_X86_64_GOTPCREL64
:
2242 case R_X86_64_GOTPLT64
:
2245 if (h
->got
.refcount
> 0)
2246 h
->got
.refcount
-= 1;
2247 if (h
->type
== STT_GNU_IFUNC
)
2249 if (h
->plt
.refcount
> 0)
2250 h
->plt
.refcount
-= 1;
2253 else if (local_got_refcounts
!= NULL
)
2255 if (local_got_refcounts
[r_symndx
] > 0)
2256 local_got_refcounts
[r_symndx
] -= 1;
2268 case R_X86_64_PC32_BND
:
2270 case R_X86_64_SIZE32
:
2271 case R_X86_64_SIZE64
:
2273 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2277 case R_X86_64_PLT32
:
2278 case R_X86_64_PLT32_BND
:
2279 case R_X86_64_PLTOFF64
:
2282 if (h
->plt
.refcount
> 0)
2283 h
->plt
.refcount
-= 1;
2295 /* Adjust a symbol defined by a dynamic object and referenced by a
2296 regular object. The current definition is in some section of the
2297 dynamic object, but we're not including those sections. We have to
2298 change the definition to something the rest of the link can
2302 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2303 struct elf_link_hash_entry
*h
)
2305 struct elf_x86_64_link_hash_table
*htab
;
2307 struct elf_x86_64_link_hash_entry
*eh
;
2308 struct elf_dyn_relocs
*p
;
2310 /* STT_GNU_IFUNC symbol must go through PLT. */
2311 if (h
->type
== STT_GNU_IFUNC
)
2313 /* All local STT_GNU_IFUNC references must be treate as local
2314 calls via local PLT. */
2316 && SYMBOL_CALLS_LOCAL (info
, h
))
2318 bfd_size_type pc_count
= 0, count
= 0;
2319 struct elf_dyn_relocs
**pp
;
2321 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2322 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2324 pc_count
+= p
->pc_count
;
2325 p
->count
-= p
->pc_count
;
2334 if (pc_count
|| count
)
2338 if (h
->plt
.refcount
<= 0)
2339 h
->plt
.refcount
= 1;
2341 h
->plt
.refcount
+= 1;
2345 if (h
->plt
.refcount
<= 0)
2347 h
->plt
.offset
= (bfd_vma
) -1;
2353 /* If this is a function, put it in the procedure linkage table. We
2354 will fill in the contents of the procedure linkage table later,
2355 when we know the address of the .got section. */
2356 if (h
->type
== STT_FUNC
2359 if (h
->plt
.refcount
<= 0
2360 || SYMBOL_CALLS_LOCAL (info
, h
)
2361 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2362 && h
->root
.type
== bfd_link_hash_undefweak
))
2364 /* This case can occur if we saw a PLT32 reloc in an input
2365 file, but the symbol was never referred to by a dynamic
2366 object, or if all references were garbage collected. In
2367 such a case, we don't actually need to build a procedure
2368 linkage table, and we can just do a PC32 reloc instead. */
2369 h
->plt
.offset
= (bfd_vma
) -1;
2376 /* It's possible that we incorrectly decided a .plt reloc was
2377 needed for an R_X86_64_PC32 reloc to a non-function sym in
2378 check_relocs. We can't decide accurately between function and
2379 non-function syms in check-relocs; Objects loaded later in
2380 the link may change h->type. So fix it now. */
2381 h
->plt
.offset
= (bfd_vma
) -1;
2383 /* If this is a weak symbol, and there is a real definition, the
2384 processor independent code will have arranged for us to see the
2385 real definition first, and we can just use the same value. */
2386 if (h
->u
.weakdef
!= NULL
)
2388 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2389 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2390 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2391 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2392 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2394 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2395 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2396 eh
->needs_copy
= h
->u
.weakdef
->needs_copy
;
2401 /* This is a reference to a symbol defined by a dynamic object which
2402 is not a function. */
2404 /* If we are creating a shared library, we must presume that the
2405 only references to the symbol are via the global offset table.
2406 For such cases we need not do anything here; the relocations will
2407 be handled correctly by relocate_section. */
2408 if (!info
->executable
)
2411 /* If there are no references to this symbol that do not use the
2412 GOT, we don't need to generate a copy reloc. */
2413 if (!h
->non_got_ref
)
2416 /* If -z nocopyreloc was given, we won't generate them either. */
2417 if (info
->nocopyreloc
)
2423 if (ELIMINATE_COPY_RELOCS
)
2425 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2426 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2428 s
= p
->sec
->output_section
;
2429 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2433 /* If we didn't find any dynamic relocs in read-only sections, then
2434 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2442 /* We must allocate the symbol in our .dynbss section, which will
2443 become part of the .bss section of the executable. There will be
2444 an entry for this symbol in the .dynsym section. The dynamic
2445 object will contain position independent code, so all references
2446 from the dynamic object to this symbol will go through the global
2447 offset table. The dynamic linker will use the .dynsym entry to
2448 determine the address it must put in the global offset table, so
2449 both the dynamic object and the regular object will refer to the
2450 same memory location for the variable. */
2452 htab
= elf_x86_64_hash_table (info
);
2456 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2457 to copy the initial value out of the dynamic object and into the
2458 runtime process image. */
2459 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2461 const struct elf_backend_data
*bed
;
2462 bed
= get_elf_backend_data (info
->output_bfd
);
2463 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2469 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2472 /* Allocate space in .plt, .got and associated reloc sections for
2476 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2478 struct bfd_link_info
*info
;
2479 struct elf_x86_64_link_hash_table
*htab
;
2480 struct elf_x86_64_link_hash_entry
*eh
;
2481 struct elf_dyn_relocs
*p
;
2482 const struct elf_backend_data
*bed
;
2483 unsigned int plt_entry_size
;
2485 if (h
->root
.type
== bfd_link_hash_indirect
)
2488 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2490 info
= (struct bfd_link_info
*) inf
;
2491 htab
= elf_x86_64_hash_table (info
);
2494 bed
= get_elf_backend_data (info
->output_bfd
);
2495 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2497 /* We can't use the GOT PLT if pointer equality is needed since
2498 finish_dynamic_symbol won't clear symbol value and the dynamic
2499 linker won't update the GOT slot. We will get into an infinite
2500 loop at run-time. */
2501 if (htab
->plt_got
!= NULL
2502 && h
->type
!= STT_GNU_IFUNC
2503 && !h
->pointer_equality_needed
2504 && h
->plt
.refcount
> 0
2505 && h
->got
.refcount
> 0)
2507 /* Don't use the regular PLT if there are both GOT and GOTPLT
2509 h
->plt
.offset
= (bfd_vma
) -1;
2511 /* Use the GOT PLT. */
2512 eh
->plt_got
.refcount
= 1;
2515 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2516 here if it is defined and referenced in a non-shared object. */
2517 if (h
->type
== STT_GNU_IFUNC
2520 if (_bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2526 asection
*s
= htab
->plt_bnd
;
2527 if (h
->plt
.offset
!= (bfd_vma
) -1 && s
!= NULL
)
2529 /* Use the .plt.bnd section if it is created. */
2530 eh
->plt_bnd
.offset
= s
->size
;
2532 /* Make room for this entry in the .plt.bnd section. */
2533 s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2541 else if (htab
->elf
.dynamic_sections_created
2542 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2544 bfd_boolean use_plt_got
;
2546 if ((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2548 /* Don't use the regular PLT for DF_BIND_NOW. */
2549 h
->plt
.offset
= (bfd_vma
) -1;
2551 /* Use the GOT PLT. */
2552 h
->got
.refcount
= 1;
2553 eh
->plt_got
.refcount
= 1;
2556 use_plt_got
= eh
->plt_got
.refcount
> 0;
2558 /* Make sure this symbol is output as a dynamic symbol.
2559 Undefined weak syms won't yet be marked as dynamic. */
2560 if (h
->dynindx
== -1
2561 && !h
->forced_local
)
2563 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2568 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2570 asection
*s
= htab
->elf
.splt
;
2571 asection
*bnd_s
= htab
->plt_bnd
;
2572 asection
*got_s
= htab
->plt_got
;
2575 eh
->plt_got
.offset
= got_s
->size
;
2578 /* If this is the first .plt entry, make room for the
2579 special first entry. */
2581 s
->size
= plt_entry_size
;
2582 h
->plt
.offset
= s
->size
;
2584 eh
->plt_bnd
.offset
= bnd_s
->size
;
2587 /* If this symbol is not defined in a regular file, and we are
2588 not generating a shared library, then set the symbol to this
2589 location in the .plt. This is required to make function
2590 pointers compare as equal between the normal executable and
2591 the shared library. */
2597 /* We need to make a call to the entry of the GOT PLT
2598 instead of regular PLT entry. */
2599 h
->root
.u
.def
.section
= got_s
;
2600 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2606 /* We need to make a call to the entry of the second
2607 PLT instead of regular PLT entry. */
2608 h
->root
.u
.def
.section
= bnd_s
;
2609 h
->root
.u
.def
.value
= eh
->plt_bnd
.offset
;
2613 h
->root
.u
.def
.section
= s
;
2614 h
->root
.u
.def
.value
= h
->plt
.offset
;
2619 /* Make room for this entry. */
2621 got_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2624 s
->size
+= plt_entry_size
;
2626 bnd_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2628 /* We also need to make an entry in the .got.plt section,
2629 which will be placed in the .got section by the linker
2631 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2633 /* We also need to make an entry in the .rela.plt
2635 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2636 htab
->elf
.srelplt
->reloc_count
++;
2641 h
->plt
.offset
= (bfd_vma
) -1;
2647 h
->plt
.offset
= (bfd_vma
) -1;
2651 eh
->tlsdesc_got
= (bfd_vma
) -1;
2653 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2654 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2655 if (h
->got
.refcount
> 0
2658 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2660 h
->got
.offset
= (bfd_vma
) -1;
2662 else if (h
->got
.refcount
> 0)
2666 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2668 /* Make sure this symbol is output as a dynamic symbol.
2669 Undefined weak syms won't yet be marked as dynamic. */
2670 if (h
->dynindx
== -1
2671 && !h
->forced_local
)
2673 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2677 if (GOT_TLS_GDESC_P (tls_type
))
2679 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2680 - elf_x86_64_compute_jump_table_size (htab
);
2681 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2682 h
->got
.offset
= (bfd_vma
) -2;
2684 if (! GOT_TLS_GDESC_P (tls_type
)
2685 || GOT_TLS_GD_P (tls_type
))
2688 h
->got
.offset
= s
->size
;
2689 s
->size
+= GOT_ENTRY_SIZE
;
2690 if (GOT_TLS_GD_P (tls_type
))
2691 s
->size
+= GOT_ENTRY_SIZE
;
2693 dyn
= htab
->elf
.dynamic_sections_created
;
2694 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2696 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2697 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2698 || tls_type
== GOT_TLS_IE
)
2699 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2700 else if (GOT_TLS_GD_P (tls_type
))
2701 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2702 else if (! GOT_TLS_GDESC_P (tls_type
)
2703 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2704 || h
->root
.type
!= bfd_link_hash_undefweak
)
2706 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2707 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2708 if (GOT_TLS_GDESC_P (tls_type
))
2710 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2711 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2715 h
->got
.offset
= (bfd_vma
) -1;
2717 if (eh
->dyn_relocs
== NULL
)
2720 /* In the shared -Bsymbolic case, discard space allocated for
2721 dynamic pc-relative relocs against symbols which turn out to be
2722 defined in regular objects. For the normal shared case, discard
2723 space for pc-relative relocs that have become local due to symbol
2724 visibility changes. */
2728 /* Relocs that use pc_count are those that appear on a call
2729 insn, or certain REL relocs that can generated via assembly.
2730 We want calls to protected symbols to resolve directly to the
2731 function rather than going via the plt. If people want
2732 function pointer comparisons to work as expected then they
2733 should avoid writing weird assembly. */
2734 if (SYMBOL_CALLS_LOCAL (info
, h
))
2736 struct elf_dyn_relocs
**pp
;
2738 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2740 p
->count
-= p
->pc_count
;
2749 /* Also discard relocs on undefined weak syms with non-default
2751 if (eh
->dyn_relocs
!= NULL
)
2753 if (h
->root
.type
== bfd_link_hash_undefweak
)
2755 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2756 eh
->dyn_relocs
= NULL
;
2758 /* Make sure undefined weak symbols are output as a dynamic
2760 else if (h
->dynindx
== -1
2761 && ! h
->forced_local
2762 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2765 /* For PIE, discard space for pc-relative relocs against
2766 symbols which turn out to need copy relocs. */
2767 else if (info
->executable
2768 && (h
->needs_copy
|| eh
->needs_copy
)
2772 struct elf_dyn_relocs
**pp
;
2774 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2776 if (p
->pc_count
!= 0)
2784 else if (ELIMINATE_COPY_RELOCS
)
2786 /* For the non-shared case, discard space for relocs against
2787 symbols which turn out to need copy relocs or are not
2793 || (htab
->elf
.dynamic_sections_created
2794 && (h
->root
.type
== bfd_link_hash_undefweak
2795 || h
->root
.type
== bfd_link_hash_undefined
))))
2797 /* Make sure this symbol is output as a dynamic symbol.
2798 Undefined weak syms won't yet be marked as dynamic. */
2799 if (h
->dynindx
== -1
2800 && ! h
->forced_local
2801 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2804 /* If that succeeded, we know we'll be keeping all the
2806 if (h
->dynindx
!= -1)
2810 eh
->dyn_relocs
= NULL
;
2815 /* Finally, allocate space. */
2816 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2820 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2822 BFD_ASSERT (sreloc
!= NULL
);
2824 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2830 /* Allocate space in .plt, .got and associated reloc sections for
2831 local dynamic relocs. */
2834 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2836 struct elf_link_hash_entry
*h
2837 = (struct elf_link_hash_entry
*) *slot
;
2839 if (h
->type
!= STT_GNU_IFUNC
2843 || h
->root
.type
!= bfd_link_hash_defined
)
2846 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2849 /* Find any dynamic relocs that apply to read-only sections. */
2852 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2855 struct elf_x86_64_link_hash_entry
*eh
;
2856 struct elf_dyn_relocs
*p
;
2858 /* Skip local IFUNC symbols. */
2859 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2862 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2863 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2865 asection
*s
= p
->sec
->output_section
;
2867 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2869 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2871 info
->flags
|= DF_TEXTREL
;
2873 if ((info
->warn_shared_textrel
&& info
->shared
)
2874 || info
->error_textrel
)
2875 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2876 p
->sec
->owner
, h
->root
.root
.string
,
2879 /* Not an error, just cut short the traversal. */
2887 mov foo@GOTPCREL(%rip), %reg
2890 with the local symbol, foo. */
2893 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2894 struct bfd_link_info
*link_info
)
2896 Elf_Internal_Shdr
*symtab_hdr
;
2897 Elf_Internal_Rela
*internal_relocs
;
2898 Elf_Internal_Rela
*irel
, *irelend
;
2900 struct elf_x86_64_link_hash_table
*htab
;
2901 bfd_boolean changed_contents
;
2902 bfd_boolean changed_relocs
;
2903 bfd_signed_vma
*local_got_refcounts
;
2904 bfd_vma maxpagesize
;
2906 /* Don't even try to convert non-ELF outputs. */
2907 if (!is_elf_hash_table (link_info
->hash
))
2910 /* Nothing to do if there is no need or no output. */
2911 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2912 || sec
->need_convert_mov_to_lea
== 0
2913 || bfd_is_abs_section (sec
->output_section
))
2916 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2918 /* Load the relocations for this section. */
2919 internal_relocs
= (_bfd_elf_link_read_relocs
2920 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2921 link_info
->keep_memory
));
2922 if (internal_relocs
== NULL
)
2925 htab
= elf_x86_64_hash_table (link_info
);
2926 changed_contents
= FALSE
;
2927 changed_relocs
= FALSE
;
2928 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2929 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
2931 /* Get the section contents. */
2932 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2933 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2936 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2940 irelend
= internal_relocs
+ sec
->reloc_count
;
2941 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2943 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2944 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2946 struct elf_link_hash_entry
*h
;
2952 } convert_mov_to_lea
;
2954 if (r_type
!= R_X86_64_GOTPCREL
)
2957 roff
= irel
->r_offset
;
2959 /* Don't convert R_X86_64_GOTPCREL relocation if it isn't for mov
2962 || bfd_get_8 (abfd
, contents
+ roff
- 2) != 0x8b)
2966 convert_mov_to_lea
= none
;
2968 /* Get the symbol referred to by the reloc. */
2969 if (r_symndx
< symtab_hdr
->sh_info
)
2971 Elf_Internal_Sym
*isym
;
2973 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2976 symtype
= ELF_ST_TYPE (isym
->st_info
);
2978 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation and
2979 skip relocation against undefined symbols. */
2980 if (symtype
!= STT_GNU_IFUNC
&& isym
->st_shndx
!= SHN_UNDEF
)
2982 if (isym
->st_shndx
== SHN_ABS
)
2983 tsec
= bfd_abs_section_ptr
;
2984 else if (isym
->st_shndx
== SHN_COMMON
)
2985 tsec
= bfd_com_section_ptr
;
2986 else if (isym
->st_shndx
== SHN_X86_64_LCOMMON
)
2987 tsec
= &_bfd_elf_large_com_section
;
2989 tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2991 toff
= isym
->st_value
;
2992 convert_mov_to_lea
= local
;
2997 indx
= r_symndx
- symtab_hdr
->sh_info
;
2998 h
= elf_sym_hashes (abfd
)[indx
];
2999 BFD_ASSERT (h
!= NULL
);
3001 while (h
->root
.type
== bfd_link_hash_indirect
3002 || h
->root
.type
== bfd_link_hash_warning
)
3003 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3005 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
3006 avoid optimizing _DYNAMIC since ld.so may use its link-time
3009 && h
->type
!= STT_GNU_IFUNC
3010 && h
!= htab
->elf
.hdynamic
3011 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
3013 tsec
= h
->root
.u
.def
.section
;
3014 toff
= h
->root
.u
.def
.value
;
3016 convert_mov_to_lea
= global
;
3020 if (convert_mov_to_lea
== none
)
3023 if (tsec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
3025 /* At this stage in linking, no SEC_MERGE symbol has been
3026 adjusted, so all references to such symbols need to be
3027 passed through _bfd_merged_section_offset. (Later, in
3028 relocate_section, all SEC_MERGE symbols *except* for
3029 section symbols have been adjusted.)
3031 gas may reduce relocations against symbols in SEC_MERGE
3032 sections to a relocation against the section symbol when
3033 the original addend was zero. When the reloc is against
3034 a section symbol we should include the addend in the
3035 offset passed to _bfd_merged_section_offset, since the
3036 location of interest is the original symbol. On the
3037 other hand, an access to "sym+addend" where "sym" is not
3038 a section symbol should not include the addend; Such an
3039 access is presumed to be an offset from "sym"; The
3040 location of interest is just "sym". */
3041 if (symtype
== STT_SECTION
)
3042 toff
+= irel
->r_addend
;
3044 toff
= _bfd_merged_section_offset (abfd
, &tsec
,
3045 elf_section_data (tsec
)->sec_info
,
3048 if (symtype
!= STT_SECTION
)
3049 toff
+= irel
->r_addend
;
3052 toff
+= irel
->r_addend
;
3054 /* Don't convert if R_X86_64_PC32 relocation overflows. */
3055 if (tsec
->output_section
== sec
->output_section
)
3057 if ((toff
- roff
+ 0x80000000) > 0xffffffff)
3065 /* At this point, we don't know the load addresses of TSEC
3066 section nor SEC section. We estimate the distrance between
3069 for (asect
= sec
->output_section
;
3070 asect
!= NULL
&& asect
!= tsec
->output_section
;
3071 asect
= asect
->next
)
3074 for (i
= asect
->output_section
->map_head
.s
;
3078 size
= align_power (size
, i
->alignment_power
);
3083 /* Don't convert R_X86_64_GOTPCREL if TSEC isn't placed after
3088 /* Take PT_GNU_RELRO segment into account by adding
3090 if ((toff
+ size
+ maxpagesize
- roff
+ 0x80000000)
3095 bfd_put_8 (abfd
, 0x8d, contents
+ roff
- 2);
3096 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
3097 changed_contents
= TRUE
;
3098 changed_relocs
= TRUE
;
3100 if (convert_mov_to_lea
== local
)
3102 if (local_got_refcounts
!= NULL
3103 && local_got_refcounts
[r_symndx
] > 0)
3104 local_got_refcounts
[r_symndx
] -= 1;
3108 if (h
->got
.refcount
> 0)
3109 h
->got
.refcount
-= 1;
3113 if (contents
!= NULL
3114 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3116 if (!changed_contents
&& !link_info
->keep_memory
)
3120 /* Cache the section contents for elf_link_input_bfd. */
3121 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3125 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3127 if (!changed_relocs
)
3128 free (internal_relocs
);
3130 elf_section_data (sec
)->relocs
= internal_relocs
;
3136 if (contents
!= NULL
3137 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3139 if (internal_relocs
!= NULL
3140 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3141 free (internal_relocs
);
3145 /* Set the sizes of the dynamic sections. */
3148 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
3149 struct bfd_link_info
*info
)
3151 struct elf_x86_64_link_hash_table
*htab
;
3156 const struct elf_backend_data
*bed
;
3158 htab
= elf_x86_64_hash_table (info
);
3161 bed
= get_elf_backend_data (output_bfd
);
3163 dynobj
= htab
->elf
.dynobj
;
3167 if (htab
->elf
.dynamic_sections_created
)
3169 /* Set the contents of the .interp section to the interpreter. */
3170 if (info
->executable
)
3172 s
= bfd_get_linker_section (dynobj
, ".interp");
3175 s
->size
= htab
->dynamic_interpreter_size
;
3176 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
3180 /* Set up .got offsets for local syms, and space for local dynamic
3182 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3184 bfd_signed_vma
*local_got
;
3185 bfd_signed_vma
*end_local_got
;
3186 char *local_tls_type
;
3187 bfd_vma
*local_tlsdesc_gotent
;
3188 bfd_size_type locsymcount
;
3189 Elf_Internal_Shdr
*symtab_hdr
;
3192 if (! is_x86_64_elf (ibfd
))
3195 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3197 struct elf_dyn_relocs
*p
;
3199 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
3202 for (p
= (struct elf_dyn_relocs
*)
3203 (elf_section_data (s
)->local_dynrel
);
3207 if (!bfd_is_abs_section (p
->sec
)
3208 && bfd_is_abs_section (p
->sec
->output_section
))
3210 /* Input section has been discarded, either because
3211 it is a copy of a linkonce section or due to
3212 linker script /DISCARD/, so we'll be discarding
3215 else if (p
->count
!= 0)
3217 srel
= elf_section_data (p
->sec
)->sreloc
;
3218 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3219 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3220 && (info
->flags
& DF_TEXTREL
) == 0)
3222 info
->flags
|= DF_TEXTREL
;
3223 if ((info
->warn_shared_textrel
&& info
->shared
)
3224 || info
->error_textrel
)
3225 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3226 p
->sec
->owner
, p
->sec
);
3232 local_got
= elf_local_got_refcounts (ibfd
);
3236 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3237 locsymcount
= symtab_hdr
->sh_info
;
3238 end_local_got
= local_got
+ locsymcount
;
3239 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
3240 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
3242 srel
= htab
->elf
.srelgot
;
3243 for (; local_got
< end_local_got
;
3244 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3246 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3249 if (GOT_TLS_GDESC_P (*local_tls_type
))
3251 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3252 - elf_x86_64_compute_jump_table_size (htab
);
3253 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3254 *local_got
= (bfd_vma
) -2;
3256 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3257 || GOT_TLS_GD_P (*local_tls_type
))
3259 *local_got
= s
->size
;
3260 s
->size
+= GOT_ENTRY_SIZE
;
3261 if (GOT_TLS_GD_P (*local_tls_type
))
3262 s
->size
+= GOT_ENTRY_SIZE
;
3265 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3266 || *local_tls_type
== GOT_TLS_IE
)
3268 if (GOT_TLS_GDESC_P (*local_tls_type
))
3270 htab
->elf
.srelplt
->size
3271 += bed
->s
->sizeof_rela
;
3272 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3274 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3275 || GOT_TLS_GD_P (*local_tls_type
))
3276 srel
->size
+= bed
->s
->sizeof_rela
;
3280 *local_got
= (bfd_vma
) -1;
3284 if (htab
->tls_ld_got
.refcount
> 0)
3286 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3288 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
3289 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
3290 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3293 htab
->tls_ld_got
.offset
= -1;
3295 /* Allocate global sym .plt and .got entries, and space for global
3296 sym dynamic relocs. */
3297 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
3300 /* Allocate .plt and .got entries, and space for local symbols. */
3301 htab_traverse (htab
->loc_hash_table
,
3302 elf_x86_64_allocate_local_dynrelocs
,
3305 /* For every jump slot reserved in the sgotplt, reloc_count is
3306 incremented. However, when we reserve space for TLS descriptors,
3307 it's not incremented, so in order to compute the space reserved
3308 for them, it suffices to multiply the reloc count by the jump
3311 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3312 so that R_X86_64_IRELATIVE entries come last. */
3313 if (htab
->elf
.srelplt
)
3315 htab
->sgotplt_jump_table_size
3316 = elf_x86_64_compute_jump_table_size (htab
);
3317 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3319 else if (htab
->elf
.irelplt
)
3320 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3322 if (htab
->tlsdesc_plt
)
3324 /* If we're not using lazy TLS relocations, don't generate the
3325 PLT and GOT entries they require. */
3326 if ((info
->flags
& DF_BIND_NOW
))
3327 htab
->tlsdesc_plt
= 0;
3330 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
3331 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
3332 /* Reserve room for the initial entry.
3333 FIXME: we could probably do away with it in this case. */
3334 if (htab
->elf
.splt
->size
== 0)
3335 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3336 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
3337 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3341 if (htab
->elf
.sgotplt
)
3343 /* Don't allocate .got.plt section if there are no GOT nor PLT
3344 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3345 if ((htab
->elf
.hgot
== NULL
3346 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3347 && (htab
->elf
.sgotplt
->size
3348 == get_elf_backend_data (output_bfd
)->got_header_size
)
3349 && (htab
->elf
.splt
== NULL
3350 || htab
->elf
.splt
->size
== 0)
3351 && (htab
->elf
.sgot
== NULL
3352 || htab
->elf
.sgot
->size
== 0)
3353 && (htab
->elf
.iplt
== NULL
3354 || htab
->elf
.iplt
->size
== 0)
3355 && (htab
->elf
.igotplt
== NULL
3356 || htab
->elf
.igotplt
->size
== 0))
3357 htab
->elf
.sgotplt
->size
= 0;
3360 if (htab
->plt_eh_frame
!= NULL
3361 && htab
->elf
.splt
!= NULL
3362 && htab
->elf
.splt
->size
!= 0
3363 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3364 && _bfd_elf_eh_frame_present (info
))
3366 const struct elf_x86_64_backend_data
*arch_data
3367 = get_elf_x86_64_arch_data (bed
);
3368 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
3371 /* We now have determined the sizes of the various dynamic sections.
3372 Allocate memory for them. */
3374 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3376 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3379 if (s
== htab
->elf
.splt
3380 || s
== htab
->elf
.sgot
3381 || s
== htab
->elf
.sgotplt
3382 || s
== htab
->elf
.iplt
3383 || s
== htab
->elf
.igotplt
3384 || s
== htab
->plt_bnd
3385 || s
== htab
->plt_got
3386 || s
== htab
->plt_eh_frame
3387 || s
== htab
->sdynbss
)
3389 /* Strip this section if we don't need it; see the
3392 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
3394 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3397 /* We use the reloc_count field as a counter if we need
3398 to copy relocs into the output file. */
3399 if (s
!= htab
->elf
.srelplt
)
3404 /* It's not one of our sections, so don't allocate space. */
3410 /* If we don't need this section, strip it from the
3411 output file. This is mostly to handle .rela.bss and
3412 .rela.plt. We must create both sections in
3413 create_dynamic_sections, because they must be created
3414 before the linker maps input sections to output
3415 sections. The linker does that before
3416 adjust_dynamic_symbol is called, and it is that
3417 function which decides whether anything needs to go
3418 into these sections. */
3420 s
->flags
|= SEC_EXCLUDE
;
3424 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3427 /* Allocate memory for the section contents. We use bfd_zalloc
3428 here in case unused entries are not reclaimed before the
3429 section's contents are written out. This should not happen,
3430 but this way if it does, we get a R_X86_64_NONE reloc instead
3432 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3433 if (s
->contents
== NULL
)
3437 if (htab
->plt_eh_frame
!= NULL
3438 && htab
->plt_eh_frame
->contents
!= NULL
)
3440 const struct elf_x86_64_backend_data
*arch_data
3441 = get_elf_x86_64_arch_data (bed
);
3443 memcpy (htab
->plt_eh_frame
->contents
,
3444 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3445 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3446 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3449 if (htab
->elf
.dynamic_sections_created
)
3451 /* Add some entries to the .dynamic section. We fill in the
3452 values later, in elf_x86_64_finish_dynamic_sections, but we
3453 must add the entries now so that we get the correct size for
3454 the .dynamic section. The DT_DEBUG entry is filled in by the
3455 dynamic linker and used by the debugger. */
3456 #define add_dynamic_entry(TAG, VAL) \
3457 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3459 if (info
->executable
)
3461 if (!add_dynamic_entry (DT_DEBUG
, 0))
3465 if (htab
->elf
.splt
->size
!= 0)
3467 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3468 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3469 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3470 || !add_dynamic_entry (DT_JMPREL
, 0))
3473 if (htab
->tlsdesc_plt
3474 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3475 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3481 if (!add_dynamic_entry (DT_RELA
, 0)
3482 || !add_dynamic_entry (DT_RELASZ
, 0)
3483 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3486 /* If any dynamic relocs apply to a read-only section,
3487 then we need a DT_TEXTREL entry. */
3488 if ((info
->flags
& DF_TEXTREL
) == 0)
3489 elf_link_hash_traverse (&htab
->elf
,
3490 elf_x86_64_readonly_dynrelocs
,
3493 if ((info
->flags
& DF_TEXTREL
) != 0)
3495 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3500 #undef add_dynamic_entry
3506 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3507 struct bfd_link_info
*info
)
3509 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3513 struct elf_link_hash_entry
*tlsbase
;
3515 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3516 "_TLS_MODULE_BASE_",
3517 FALSE
, FALSE
, FALSE
);
3519 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3521 struct elf_x86_64_link_hash_table
*htab
;
3522 struct bfd_link_hash_entry
*bh
= NULL
;
3523 const struct elf_backend_data
*bed
3524 = get_elf_backend_data (output_bfd
);
3526 htab
= elf_x86_64_hash_table (info
);
3530 if (!(_bfd_generic_link_add_one_symbol
3531 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3532 tls_sec
, 0, NULL
, FALSE
,
3533 bed
->collect
, &bh
)))
3536 htab
->tls_module_base
= bh
;
3538 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3539 tlsbase
->def_regular
= 1;
3540 tlsbase
->other
= STV_HIDDEN
;
3541 tlsbase
->root
.linker_def
= 1;
3542 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3549 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3550 executables. Rather than setting it to the beginning of the TLS
3551 section, we have to set it to the end. This function may be called
3552 multiple times, it is idempotent. */
3555 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3557 struct elf_x86_64_link_hash_table
*htab
;
3558 struct bfd_link_hash_entry
*base
;
3560 if (!info
->executable
)
3563 htab
= elf_x86_64_hash_table (info
);
3567 base
= htab
->tls_module_base
;
3571 base
->u
.def
.value
= htab
->elf
.tls_size
;
3574 /* Return the base VMA address which should be subtracted from real addresses
3575 when resolving @dtpoff relocation.
3576 This is PT_TLS segment p_vaddr. */
3579 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3581 /* If tls_sec is NULL, we should have signalled an error already. */
3582 if (elf_hash_table (info
)->tls_sec
== NULL
)
3584 return elf_hash_table (info
)->tls_sec
->vma
;
3587 /* Return the relocation value for @tpoff relocation
3588 if STT_TLS virtual address is ADDRESS. */
3591 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3593 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3594 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3595 bfd_vma static_tls_size
;
3597 /* If tls_segment is NULL, we should have signalled an error already. */
3598 if (htab
->tls_sec
== NULL
)
3601 /* Consider special static TLS alignment requirements. */
3602 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3603 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3606 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3610 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3612 /* Opcode Instruction
3615 0x0f 0x8x conditional jump */
3617 && (contents
[offset
- 1] == 0xe8
3618 || contents
[offset
- 1] == 0xe9))
3620 && contents
[offset
- 2] == 0x0f
3621 && (contents
[offset
- 1] & 0xf0) == 0x80));
3624 /* Relocate an x86_64 ELF section. */
3627 elf_x86_64_relocate_section (bfd
*output_bfd
,
3628 struct bfd_link_info
*info
,
3630 asection
*input_section
,
3632 Elf_Internal_Rela
*relocs
,
3633 Elf_Internal_Sym
*local_syms
,
3634 asection
**local_sections
)
3636 struct elf_x86_64_link_hash_table
*htab
;
3637 Elf_Internal_Shdr
*symtab_hdr
;
3638 struct elf_link_hash_entry
**sym_hashes
;
3639 bfd_vma
*local_got_offsets
;
3640 bfd_vma
*local_tlsdesc_gotents
;
3641 Elf_Internal_Rela
*rel
;
3642 Elf_Internal_Rela
*relend
;
3643 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3645 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3647 htab
= elf_x86_64_hash_table (info
);
3650 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3651 sym_hashes
= elf_sym_hashes (input_bfd
);
3652 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3653 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3655 elf_x86_64_set_tls_module_base (info
);
3658 relend
= relocs
+ input_section
->reloc_count
;
3659 for (; rel
< relend
; rel
++)
3661 unsigned int r_type
;
3662 reloc_howto_type
*howto
;
3663 unsigned long r_symndx
;
3664 struct elf_link_hash_entry
*h
;
3665 struct elf_x86_64_link_hash_entry
*eh
;
3666 Elf_Internal_Sym
*sym
;
3668 bfd_vma off
, offplt
, plt_offset
;
3670 bfd_boolean unresolved_reloc
;
3671 bfd_reloc_status_type r
;
3673 asection
*base_got
, *resolved_plt
;
3676 r_type
= ELF32_R_TYPE (rel
->r_info
);
3677 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3678 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3681 if (r_type
>= (int) R_X86_64_standard
)
3683 (*_bfd_error_handler
)
3684 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3685 input_bfd
, input_section
, r_type
);
3686 bfd_set_error (bfd_error_bad_value
);
3690 if (r_type
!= (int) R_X86_64_32
3691 || ABI_64_P (output_bfd
))
3692 howto
= x86_64_elf_howto_table
+ r_type
;
3694 howto
= (x86_64_elf_howto_table
3695 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3696 r_symndx
= htab
->r_sym (rel
->r_info
);
3700 unresolved_reloc
= FALSE
;
3701 if (r_symndx
< symtab_hdr
->sh_info
)
3703 sym
= local_syms
+ r_symndx
;
3704 sec
= local_sections
[r_symndx
];
3706 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3708 st_size
= sym
->st_size
;
3710 /* Relocate against local STT_GNU_IFUNC symbol. */
3711 if (!info
->relocatable
3712 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3714 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3719 /* Set STT_GNU_IFUNC symbol value. */
3720 h
->root
.u
.def
.value
= sym
->st_value
;
3721 h
->root
.u
.def
.section
= sec
;
3726 bfd_boolean warned ATTRIBUTE_UNUSED
;
3727 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3729 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3730 r_symndx
, symtab_hdr
, sym_hashes
,
3732 unresolved_reloc
, warned
, ignored
);
3736 if (sec
!= NULL
&& discarded_section (sec
))
3737 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3738 rel
, 1, relend
, howto
, 0, contents
);
3740 if (info
->relocatable
)
3743 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3745 if (r_type
== R_X86_64_64
)
3747 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3748 zero-extend it to 64bit if addend is zero. */
3749 r_type
= R_X86_64_32
;
3750 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3752 else if (r_type
== R_X86_64_SIZE64
)
3754 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3755 zero-extend it to 64bit if addend is zero. */
3756 r_type
= R_X86_64_SIZE32
;
3757 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3761 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3763 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3764 it here if it is defined in a non-shared object. */
3766 && h
->type
== STT_GNU_IFUNC
3772 if ((input_section
->flags
& SEC_ALLOC
) == 0
3773 || h
->plt
.offset
== (bfd_vma
) -1)
3776 /* STT_GNU_IFUNC symbol must go through PLT. */
3777 if (htab
->elf
.splt
!= NULL
)
3779 if (htab
->plt_bnd
!= NULL
)
3781 resolved_plt
= htab
->plt_bnd
;
3782 plt_offset
= eh
->plt_bnd
.offset
;
3786 resolved_plt
= htab
->elf
.splt
;
3787 plt_offset
= h
->plt
.offset
;
3792 resolved_plt
= htab
->elf
.iplt
;
3793 plt_offset
= h
->plt
.offset
;
3796 relocation
= (resolved_plt
->output_section
->vma
3797 + resolved_plt
->output_offset
+ plt_offset
);
3802 if (h
->root
.root
.string
)
3803 name
= h
->root
.root
.string
;
3805 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3807 (*_bfd_error_handler
)
3808 (_("%B: relocation %s against STT_GNU_IFUNC "
3809 "symbol `%s' isn't handled by %s"), input_bfd
,
3810 x86_64_elf_howto_table
[r_type
].name
,
3811 name
, __FUNCTION__
);
3812 bfd_set_error (bfd_error_bad_value
);
3821 if (ABI_64_P (output_bfd
))
3825 if (rel
->r_addend
!= 0)
3827 if (h
->root
.root
.string
)
3828 name
= h
->root
.root
.string
;
3830 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3832 (*_bfd_error_handler
)
3833 (_("%B: relocation %s against STT_GNU_IFUNC "
3834 "symbol `%s' has non-zero addend: %d"),
3835 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3836 name
, rel
->r_addend
);
3837 bfd_set_error (bfd_error_bad_value
);
3841 /* Generate dynamic relcoation only when there is a
3842 non-GOT reference in a shared object. */
3843 if (info
->shared
&& h
->non_got_ref
)
3845 Elf_Internal_Rela outrel
;
3848 /* Need a dynamic relocation to get the real function
3850 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3854 if (outrel
.r_offset
== (bfd_vma
) -1
3855 || outrel
.r_offset
== (bfd_vma
) -2)
3858 outrel
.r_offset
+= (input_section
->output_section
->vma
3859 + input_section
->output_offset
);
3861 if (h
->dynindx
== -1
3863 || info
->executable
)
3865 /* This symbol is resolved locally. */
3866 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3867 outrel
.r_addend
= (h
->root
.u
.def
.value
3868 + h
->root
.u
.def
.section
->output_section
->vma
3869 + h
->root
.u
.def
.section
->output_offset
);
3873 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3874 outrel
.r_addend
= 0;
3877 sreloc
= htab
->elf
.irelifunc
;
3878 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3880 /* If this reloc is against an external symbol, we
3881 do not want to fiddle with the addend. Otherwise,
3882 we need to include the symbol value so that it
3883 becomes an addend for the dynamic reloc. For an
3884 internal symbol, we have updated addend. */
3889 case R_X86_64_PC32_BND
:
3891 case R_X86_64_PLT32
:
3892 case R_X86_64_PLT32_BND
:
3895 case R_X86_64_GOTPCREL
:
3896 case R_X86_64_GOTPCREL64
:
3897 base_got
= htab
->elf
.sgot
;
3898 off
= h
->got
.offset
;
3900 if (base_got
== NULL
)
3903 if (off
== (bfd_vma
) -1)
3905 /* We can't use h->got.offset here to save state, or
3906 even just remember the offset, as finish_dynamic_symbol
3907 would use that as offset into .got. */
3909 if (htab
->elf
.splt
!= NULL
)
3911 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3912 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3913 base_got
= htab
->elf
.sgotplt
;
3917 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3918 off
= plt_index
* GOT_ENTRY_SIZE
;
3919 base_got
= htab
->elf
.igotplt
;
3922 if (h
->dynindx
== -1
3926 /* This references the local defitionion. We must
3927 initialize this entry in the global offset table.
3928 Since the offset must always be a multiple of 8,
3929 we use the least significant bit to record
3930 whether we have initialized it already.
3932 When doing a dynamic link, we create a .rela.got
3933 relocation entry to initialize the value. This
3934 is done in the finish_dynamic_symbol routine. */
3939 bfd_put_64 (output_bfd
, relocation
,
3940 base_got
->contents
+ off
);
3941 /* Note that this is harmless for the GOTPLT64
3942 case, as -1 | 1 still is -1. */
3948 relocation
= (base_got
->output_section
->vma
3949 + base_got
->output_offset
+ off
);
3955 /* When generating a shared object, the relocations handled here are
3956 copied into the output file to be resolved at run time. */
3959 case R_X86_64_GOT32
:
3960 case R_X86_64_GOT64
:
3961 /* Relocation is to the entry for this symbol in the global
3963 case R_X86_64_GOTPCREL
:
3964 case R_X86_64_GOTPCREL64
:
3965 /* Use global offset table entry as symbol value. */
3966 case R_X86_64_GOTPLT64
:
3967 /* This is obsolete and treated the the same as GOT64. */
3968 base_got
= htab
->elf
.sgot
;
3970 if (htab
->elf
.sgot
== NULL
)
3977 off
= h
->got
.offset
;
3979 && h
->plt
.offset
!= (bfd_vma
)-1
3980 && off
== (bfd_vma
)-1)
3982 /* We can't use h->got.offset here to save
3983 state, or even just remember the offset, as
3984 finish_dynamic_symbol would use that as offset into
3986 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3987 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3988 base_got
= htab
->elf
.sgotplt
;
3991 dyn
= htab
->elf
.dynamic_sections_created
;
3993 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3995 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3996 || (ELF_ST_VISIBILITY (h
->other
)
3997 && h
->root
.type
== bfd_link_hash_undefweak
))
3999 /* This is actually a static link, or it is a -Bsymbolic
4000 link and the symbol is defined locally, or the symbol
4001 was forced to be local because of a version file. We
4002 must initialize this entry in the global offset table.
4003 Since the offset must always be a multiple of 8, we
4004 use the least significant bit to record whether we
4005 have initialized it already.
4007 When doing a dynamic link, we create a .rela.got
4008 relocation entry to initialize the value. This is
4009 done in the finish_dynamic_symbol routine. */
4014 bfd_put_64 (output_bfd
, relocation
,
4015 base_got
->contents
+ off
);
4016 /* Note that this is harmless for the GOTPLT64 case,
4017 as -1 | 1 still is -1. */
4022 unresolved_reloc
= FALSE
;
4026 if (local_got_offsets
== NULL
)
4029 off
= local_got_offsets
[r_symndx
];
4031 /* The offset must always be a multiple of 8. We use
4032 the least significant bit to record whether we have
4033 already generated the necessary reloc. */
4038 bfd_put_64 (output_bfd
, relocation
,
4039 base_got
->contents
+ off
);
4044 Elf_Internal_Rela outrel
;
4046 /* We need to generate a R_X86_64_RELATIVE reloc
4047 for the dynamic linker. */
4048 s
= htab
->elf
.srelgot
;
4052 outrel
.r_offset
= (base_got
->output_section
->vma
4053 + base_got
->output_offset
4055 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4056 outrel
.r_addend
= relocation
;
4057 elf_append_rela (output_bfd
, s
, &outrel
);
4060 local_got_offsets
[r_symndx
] |= 1;
4064 if (off
>= (bfd_vma
) -2)
4067 relocation
= base_got
->output_section
->vma
4068 + base_got
->output_offset
+ off
;
4069 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
4070 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4071 - htab
->elf
.sgotplt
->output_offset
;
4075 case R_X86_64_GOTOFF64
:
4076 /* Relocation is relative to the start of the global offset
4079 /* Check to make sure it isn't a protected function or data
4080 symbol for shared library since it may not be local when
4081 used as function address or with copy relocation. We also
4082 need to make sure that a symbol is referenced locally. */
4083 if (info
->shared
&& h
)
4085 if (!h
->def_regular
)
4089 switch (ELF_ST_VISIBILITY (h
->other
))
4092 v
= _("hidden symbol");
4095 v
= _("internal symbol");
4098 v
= _("protected symbol");
4105 (*_bfd_error_handler
)
4106 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
4107 input_bfd
, v
, h
->root
.root
.string
);
4108 bfd_set_error (bfd_error_bad_value
);
4111 else if (!info
->executable
4112 && !SYMBOL_REFERENCES_LOCAL (info
, h
)
4113 && (h
->type
== STT_FUNC
4114 || h
->type
== STT_OBJECT
)
4115 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4117 (*_bfd_error_handler
)
4118 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
4120 h
->type
== STT_FUNC
? "function" : "data",
4121 h
->root
.root
.string
);
4122 bfd_set_error (bfd_error_bad_value
);
4127 /* Note that sgot is not involved in this
4128 calculation. We always want the start of .got.plt. If we
4129 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4130 permitted by the ABI, we might have to change this
4132 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4133 + htab
->elf
.sgotplt
->output_offset
;
4136 case R_X86_64_GOTPC32
:
4137 case R_X86_64_GOTPC64
:
4138 /* Use global offset table as symbol value. */
4139 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4140 + htab
->elf
.sgotplt
->output_offset
;
4141 unresolved_reloc
= FALSE
;
4144 case R_X86_64_PLTOFF64
:
4145 /* Relocation is PLT entry relative to GOT. For local
4146 symbols it's the symbol itself relative to GOT. */
4148 /* See PLT32 handling. */
4149 && h
->plt
.offset
!= (bfd_vma
) -1
4150 && htab
->elf
.splt
!= NULL
)
4152 if (htab
->plt_bnd
!= NULL
)
4154 resolved_plt
= htab
->plt_bnd
;
4155 plt_offset
= eh
->plt_bnd
.offset
;
4159 resolved_plt
= htab
->elf
.splt
;
4160 plt_offset
= h
->plt
.offset
;
4163 relocation
= (resolved_plt
->output_section
->vma
4164 + resolved_plt
->output_offset
4166 unresolved_reloc
= FALSE
;
4169 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4170 + htab
->elf
.sgotplt
->output_offset
;
4173 case R_X86_64_PLT32
:
4174 case R_X86_64_PLT32_BND
:
4175 /* Relocation is to the entry for this symbol in the
4176 procedure linkage table. */
4178 /* Resolve a PLT32 reloc against a local symbol directly,
4179 without using the procedure linkage table. */
4183 if ((h
->plt
.offset
== (bfd_vma
) -1
4184 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4185 || htab
->elf
.splt
== NULL
)
4187 /* We didn't make a PLT entry for this symbol. This
4188 happens when statically linking PIC code, or when
4189 using -Bsymbolic. */
4193 if (h
->plt
.offset
!= (bfd_vma
) -1)
4195 if (htab
->plt_bnd
!= NULL
)
4197 resolved_plt
= htab
->plt_bnd
;
4198 plt_offset
= eh
->plt_bnd
.offset
;
4202 resolved_plt
= htab
->elf
.splt
;
4203 plt_offset
= h
->plt
.offset
;
4208 /* Use the GOT PLT. */
4209 resolved_plt
= htab
->plt_got
;
4210 plt_offset
= eh
->plt_got
.offset
;
4213 relocation
= (resolved_plt
->output_section
->vma
4214 + resolved_plt
->output_offset
4216 unresolved_reloc
= FALSE
;
4219 case R_X86_64_SIZE32
:
4220 case R_X86_64_SIZE64
:
4221 /* Set to symbol size. */
4222 relocation
= st_size
;
4228 case R_X86_64_PC32_BND
:
4229 /* Don't complain about -fPIC if the symbol is undefined when
4230 building executable. */
4232 && (input_section
->flags
& SEC_ALLOC
) != 0
4233 && (input_section
->flags
& SEC_READONLY
) != 0
4235 && !(info
->executable
4236 && h
->root
.type
== bfd_link_hash_undefined
))
4238 bfd_boolean fail
= FALSE
;
4240 = ((r_type
== R_X86_64_PC32
4241 || r_type
== R_X86_64_PC32_BND
)
4242 && is_32bit_relative_branch (contents
, rel
->r_offset
));
4244 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
4246 /* Symbol is referenced locally. Make sure it is
4247 defined locally or for a branch. */
4248 fail
= !h
->def_regular
&& !branch
;
4250 else if (!(info
->executable
4251 && (h
->needs_copy
|| eh
->needs_copy
)))
4253 /* Symbol doesn't need copy reloc and isn't referenced
4254 locally. We only allow branch to symbol with
4255 non-default visibility. */
4257 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
4264 const char *pic
= "";
4266 switch (ELF_ST_VISIBILITY (h
->other
))
4269 v
= _("hidden symbol");
4272 v
= _("internal symbol");
4275 v
= _("protected symbol");
4279 pic
= _("; recompile with -fPIC");
4284 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4286 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4288 (*_bfd_error_handler
) (fmt
, input_bfd
,
4289 x86_64_elf_howto_table
[r_type
].name
,
4290 v
, h
->root
.root
.string
, pic
);
4291 bfd_set_error (bfd_error_bad_value
);
4302 /* FIXME: The ABI says the linker should make sure the value is
4303 the same when it's zeroextended to 64 bit. */
4306 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4309 /* Don't copy a pc-relative relocation into the output file
4310 if the symbol needs copy reloc or the symbol is undefined
4311 when building executable. */
4313 && !(info
->executable
4317 || h
->root
.type
== bfd_link_hash_undefined
)
4318 && IS_X86_64_PCREL_TYPE (r_type
))
4320 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4321 || h
->root
.type
!= bfd_link_hash_undefweak
)
4322 && ((! IS_X86_64_PCREL_TYPE (r_type
)
4323 && r_type
!= R_X86_64_SIZE32
4324 && r_type
!= R_X86_64_SIZE64
)
4325 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
4326 || (ELIMINATE_COPY_RELOCS
4333 || h
->root
.type
== bfd_link_hash_undefweak
4334 || h
->root
.type
== bfd_link_hash_undefined
)))
4336 Elf_Internal_Rela outrel
;
4337 bfd_boolean skip
, relocate
;
4340 /* When generating a shared object, these relocations
4341 are copied into the output file to be resolved at run
4347 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4349 if (outrel
.r_offset
== (bfd_vma
) -1)
4351 else if (outrel
.r_offset
== (bfd_vma
) -2)
4352 skip
= TRUE
, relocate
= TRUE
;
4354 outrel
.r_offset
+= (input_section
->output_section
->vma
4355 + input_section
->output_offset
);
4358 memset (&outrel
, 0, sizeof outrel
);
4360 /* h->dynindx may be -1 if this symbol was marked to
4364 && (IS_X86_64_PCREL_TYPE (r_type
)
4366 || ! SYMBOLIC_BIND (info
, h
)
4367 || ! h
->def_regular
))
4369 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
4370 outrel
.r_addend
= rel
->r_addend
;
4374 /* This symbol is local, or marked to become local. */
4375 if (r_type
== htab
->pointer_r_type
)
4378 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4379 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4381 else if (r_type
== R_X86_64_64
4382 && !ABI_64_P (output_bfd
))
4385 outrel
.r_info
= htab
->r_info (0,
4386 R_X86_64_RELATIVE64
);
4387 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4388 /* Check addend overflow. */
4389 if ((outrel
.r_addend
& 0x80000000)
4390 != (rel
->r_addend
& 0x80000000))
4393 int addend
= rel
->r_addend
;
4394 if (h
&& h
->root
.root
.string
)
4395 name
= h
->root
.root
.string
;
4397 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4400 (*_bfd_error_handler
)
4401 (_("%B: addend -0x%x in relocation %s against "
4402 "symbol `%s' at 0x%lx in section `%A' is "
4404 input_bfd
, input_section
, addend
,
4405 x86_64_elf_howto_table
[r_type
].name
,
4406 name
, (unsigned long) rel
->r_offset
);
4408 (*_bfd_error_handler
)
4409 (_("%B: addend 0x%x in relocation %s against "
4410 "symbol `%s' at 0x%lx in section `%A' is "
4412 input_bfd
, input_section
, addend
,
4413 x86_64_elf_howto_table
[r_type
].name
,
4414 name
, (unsigned long) rel
->r_offset
);
4415 bfd_set_error (bfd_error_bad_value
);
4423 if (bfd_is_abs_section (sec
))
4425 else if (sec
== NULL
|| sec
->owner
== NULL
)
4427 bfd_set_error (bfd_error_bad_value
);
4434 /* We are turning this relocation into one
4435 against a section symbol. It would be
4436 proper to subtract the symbol's value,
4437 osec->vma, from the emitted reloc addend,
4438 but ld.so expects buggy relocs. */
4439 osec
= sec
->output_section
;
4440 sindx
= elf_section_data (osec
)->dynindx
;
4443 asection
*oi
= htab
->elf
.text_index_section
;
4444 sindx
= elf_section_data (oi
)->dynindx
;
4446 BFD_ASSERT (sindx
!= 0);
4449 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
4450 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4454 sreloc
= elf_section_data (input_section
)->sreloc
;
4456 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4458 r
= bfd_reloc_notsupported
;
4459 goto check_relocation_error
;
4462 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4464 /* If this reloc is against an external symbol, we do
4465 not want to fiddle with the addend. Otherwise, we
4466 need to include the symbol value so that it becomes
4467 an addend for the dynamic reloc. */
4474 case R_X86_64_TLSGD
:
4475 case R_X86_64_GOTPC32_TLSDESC
:
4476 case R_X86_64_TLSDESC_CALL
:
4477 case R_X86_64_GOTTPOFF
:
4478 tls_type
= GOT_UNKNOWN
;
4479 if (h
== NULL
&& local_got_offsets
)
4480 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
4482 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
4484 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4485 input_section
, contents
,
4486 symtab_hdr
, sym_hashes
,
4487 &r_type
, tls_type
, rel
,
4488 relend
, h
, r_symndx
))
4491 if (r_type
== R_X86_64_TPOFF32
)
4493 bfd_vma roff
= rel
->r_offset
;
4495 BFD_ASSERT (! unresolved_reloc
);
4497 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4499 /* GD->LE transition. For 64bit, change
4500 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4501 .word 0x6666; rex64; call __tls_get_addr
4504 leaq foo@tpoff(%rax), %rax
4506 leaq foo@tlsgd(%rip), %rdi
4507 .word 0x6666; rex64; call __tls_get_addr
4510 leaq foo@tpoff(%rax), %rax
4511 For largepic, change:
4512 leaq foo@tlsgd(%rip), %rdi
4513 movabsq $__tls_get_addr@pltoff, %rax
4518 leaq foo@tpoff(%rax), %rax
4519 nopw 0x0(%rax,%rax,1) */
4521 if (ABI_64_P (output_bfd
)
4522 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4524 memcpy (contents
+ roff
- 3,
4525 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4526 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4529 else if (ABI_64_P (output_bfd
))
4530 memcpy (contents
+ roff
- 4,
4531 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4534 memcpy (contents
+ roff
- 3,
4535 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4537 bfd_put_32 (output_bfd
,
4538 elf_x86_64_tpoff (info
, relocation
),
4539 contents
+ roff
+ 8 + largepic
);
4540 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4544 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4546 /* GDesc -> LE transition.
4547 It's originally something like:
4548 leaq x@tlsdesc(%rip), %rax
4551 movl $x@tpoff, %rax. */
4553 unsigned int val
, type
;
4555 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4556 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4557 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4558 contents
+ roff
- 3);
4559 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4560 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4561 contents
+ roff
- 1);
4562 bfd_put_32 (output_bfd
,
4563 elf_x86_64_tpoff (info
, relocation
),
4567 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4569 /* GDesc -> LE transition.
4574 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4575 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4578 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4580 /* IE->LE transition:
4581 For 64bit, originally it can be one of:
4582 movq foo@gottpoff(%rip), %reg
4583 addq foo@gottpoff(%rip), %reg
4586 leaq foo(%reg), %reg
4588 For 32bit, originally it can be one of:
4589 movq foo@gottpoff(%rip), %reg
4590 addl foo@gottpoff(%rip), %reg
4593 leal foo(%reg), %reg
4596 unsigned int val
, type
, reg
;
4599 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4602 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4603 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4609 bfd_put_8 (output_bfd
, 0x49,
4610 contents
+ roff
- 3);
4611 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4612 bfd_put_8 (output_bfd
, 0x41,
4613 contents
+ roff
- 3);
4614 bfd_put_8 (output_bfd
, 0xc7,
4615 contents
+ roff
- 2);
4616 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4617 contents
+ roff
- 1);
4621 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4624 bfd_put_8 (output_bfd
, 0x49,
4625 contents
+ roff
- 3);
4626 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4627 bfd_put_8 (output_bfd
, 0x41,
4628 contents
+ roff
- 3);
4629 bfd_put_8 (output_bfd
, 0x81,
4630 contents
+ roff
- 2);
4631 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4632 contents
+ roff
- 1);
4636 /* addq/addl -> leaq/leal */
4638 bfd_put_8 (output_bfd
, 0x4d,
4639 contents
+ roff
- 3);
4640 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4641 bfd_put_8 (output_bfd
, 0x45,
4642 contents
+ roff
- 3);
4643 bfd_put_8 (output_bfd
, 0x8d,
4644 contents
+ roff
- 2);
4645 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4646 contents
+ roff
- 1);
4648 bfd_put_32 (output_bfd
,
4649 elf_x86_64_tpoff (info
, relocation
),
4657 if (htab
->elf
.sgot
== NULL
)
4662 off
= h
->got
.offset
;
4663 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4667 if (local_got_offsets
== NULL
)
4670 off
= local_got_offsets
[r_symndx
];
4671 offplt
= local_tlsdesc_gotents
[r_symndx
];
4678 Elf_Internal_Rela outrel
;
4682 if (htab
->elf
.srelgot
== NULL
)
4685 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4687 if (GOT_TLS_GDESC_P (tls_type
))
4689 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4690 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4691 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4692 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4693 + htab
->elf
.sgotplt
->output_offset
4695 + htab
->sgotplt_jump_table_size
);
4696 sreloc
= htab
->elf
.srelplt
;
4698 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4700 outrel
.r_addend
= 0;
4701 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4704 sreloc
= htab
->elf
.srelgot
;
4706 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4707 + htab
->elf
.sgot
->output_offset
+ off
);
4709 if (GOT_TLS_GD_P (tls_type
))
4710 dr_type
= R_X86_64_DTPMOD64
;
4711 else if (GOT_TLS_GDESC_P (tls_type
))
4714 dr_type
= R_X86_64_TPOFF64
;
4716 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4717 outrel
.r_addend
= 0;
4718 if ((dr_type
== R_X86_64_TPOFF64
4719 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4720 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4721 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4723 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4725 if (GOT_TLS_GD_P (tls_type
))
4729 BFD_ASSERT (! unresolved_reloc
);
4730 bfd_put_64 (output_bfd
,
4731 relocation
- elf_x86_64_dtpoff_base (info
),
4732 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4736 bfd_put_64 (output_bfd
, 0,
4737 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4738 outrel
.r_info
= htab
->r_info (indx
,
4740 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4741 elf_append_rela (output_bfd
, sreloc
,
4750 local_got_offsets
[r_symndx
] |= 1;
4753 if (off
>= (bfd_vma
) -2
4754 && ! GOT_TLS_GDESC_P (tls_type
))
4756 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4758 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4759 || r_type
== R_X86_64_TLSDESC_CALL
)
4760 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4761 + htab
->elf
.sgotplt
->output_offset
4762 + offplt
+ htab
->sgotplt_jump_table_size
;
4764 relocation
= htab
->elf
.sgot
->output_section
->vma
4765 + htab
->elf
.sgot
->output_offset
+ off
;
4766 unresolved_reloc
= FALSE
;
4770 bfd_vma roff
= rel
->r_offset
;
4772 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4774 /* GD->IE transition. For 64bit, change
4775 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4776 .word 0x6666; rex64; call __tls_get_addr@plt
4779 addq foo@gottpoff(%rip), %rax
4781 leaq foo@tlsgd(%rip), %rdi
4782 .word 0x6666; rex64; call __tls_get_addr@plt
4785 addq foo@gottpoff(%rip), %rax
4786 For largepic, change:
4787 leaq foo@tlsgd(%rip), %rdi
4788 movabsq $__tls_get_addr@pltoff, %rax
4793 addq foo@gottpoff(%rax), %rax
4794 nopw 0x0(%rax,%rax,1) */
4796 if (ABI_64_P (output_bfd
)
4797 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4799 memcpy (contents
+ roff
- 3,
4800 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4801 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4804 else if (ABI_64_P (output_bfd
))
4805 memcpy (contents
+ roff
- 4,
4806 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4809 memcpy (contents
+ roff
- 3,
4810 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4813 relocation
= (htab
->elf
.sgot
->output_section
->vma
4814 + htab
->elf
.sgot
->output_offset
+ off
4817 - input_section
->output_section
->vma
4818 - input_section
->output_offset
4820 bfd_put_32 (output_bfd
, relocation
,
4821 contents
+ roff
+ 8 + largepic
);
4822 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4826 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4828 /* GDesc -> IE transition.
4829 It's originally something like:
4830 leaq x@tlsdesc(%rip), %rax
4833 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4835 /* Now modify the instruction as appropriate. To
4836 turn a leaq into a movq in the form we use it, it
4837 suffices to change the second byte from 0x8d to
4839 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4841 bfd_put_32 (output_bfd
,
4842 htab
->elf
.sgot
->output_section
->vma
4843 + htab
->elf
.sgot
->output_offset
+ off
4845 - input_section
->output_section
->vma
4846 - input_section
->output_offset
4851 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4853 /* GDesc -> IE transition.
4860 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4861 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4869 case R_X86_64_TLSLD
:
4870 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4871 input_section
, contents
,
4872 symtab_hdr
, sym_hashes
,
4873 &r_type
, GOT_UNKNOWN
,
4874 rel
, relend
, h
, r_symndx
))
4877 if (r_type
!= R_X86_64_TLSLD
)
4879 /* LD->LE transition:
4880 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4881 For 64bit, we change it into:
4882 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4883 For 32bit, we change it into:
4884 nopl 0x0(%rax); movl %fs:0, %eax.
4885 For largepic, change:
4886 leaq foo@tlsgd(%rip), %rdi
4887 movabsq $__tls_get_addr@pltoff, %rax
4891 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4894 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4895 if (ABI_64_P (output_bfd
)
4896 && contents
[rel
->r_offset
+ 5] == (bfd_byte
) '\xb8')
4897 memcpy (contents
+ rel
->r_offset
- 3,
4898 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4899 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4900 else if (ABI_64_P (output_bfd
))
4901 memcpy (contents
+ rel
->r_offset
- 3,
4902 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4904 memcpy (contents
+ rel
->r_offset
- 3,
4905 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4906 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4911 if (htab
->elf
.sgot
== NULL
)
4914 off
= htab
->tls_ld_got
.offset
;
4919 Elf_Internal_Rela outrel
;
4921 if (htab
->elf
.srelgot
== NULL
)
4924 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4925 + htab
->elf
.sgot
->output_offset
+ off
);
4927 bfd_put_64 (output_bfd
, 0,
4928 htab
->elf
.sgot
->contents
+ off
);
4929 bfd_put_64 (output_bfd
, 0,
4930 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4931 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4932 outrel
.r_addend
= 0;
4933 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4935 htab
->tls_ld_got
.offset
|= 1;
4937 relocation
= htab
->elf
.sgot
->output_section
->vma
4938 + htab
->elf
.sgot
->output_offset
+ off
;
4939 unresolved_reloc
= FALSE
;
4942 case R_X86_64_DTPOFF32
:
4943 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4944 relocation
-= elf_x86_64_dtpoff_base (info
);
4946 relocation
= elf_x86_64_tpoff (info
, relocation
);
4949 case R_X86_64_TPOFF32
:
4950 case R_X86_64_TPOFF64
:
4951 BFD_ASSERT (info
->executable
);
4952 relocation
= elf_x86_64_tpoff (info
, relocation
);
4955 case R_X86_64_DTPOFF64
:
4956 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4957 relocation
-= elf_x86_64_dtpoff_base (info
);
4964 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4965 because such sections are not SEC_ALLOC and thus ld.so will
4966 not process them. */
4967 if (unresolved_reloc
4968 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4970 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4971 rel
->r_offset
) != (bfd_vma
) -1)
4973 (*_bfd_error_handler
)
4974 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4977 (long) rel
->r_offset
,
4979 h
->root
.root
.string
);
4984 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4985 contents
, rel
->r_offset
,
4986 relocation
, rel
->r_addend
);
4988 check_relocation_error
:
4989 if (r
!= bfd_reloc_ok
)
4994 name
= h
->root
.root
.string
;
4997 name
= bfd_elf_string_from_elf_section (input_bfd
,
4998 symtab_hdr
->sh_link
,
5003 name
= bfd_section_name (input_bfd
, sec
);
5006 if (r
== bfd_reloc_overflow
)
5008 if (! ((*info
->callbacks
->reloc_overflow
)
5009 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5010 (bfd_vma
) 0, input_bfd
, input_section
,
5016 (*_bfd_error_handler
)
5017 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5018 input_bfd
, input_section
,
5019 (long) rel
->r_offset
, name
, (int) r
);
5028 /* Finish up dynamic symbol handling. We set the contents of various
5029 dynamic sections here. */
5032 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
5033 struct bfd_link_info
*info
,
5034 struct elf_link_hash_entry
*h
,
5035 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
5037 struct elf_x86_64_link_hash_table
*htab
;
5038 const struct elf_x86_64_backend_data
*abed
;
5039 bfd_boolean use_plt_bnd
;
5040 struct elf_x86_64_link_hash_entry
*eh
;
5042 htab
= elf_x86_64_hash_table (info
);
5046 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5047 section only if there is .plt section. */
5048 use_plt_bnd
= htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
;
5050 ? &elf_x86_64_bnd_arch_bed
5051 : get_elf_x86_64_backend_data (output_bfd
));
5053 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
5055 if (h
->plt
.offset
!= (bfd_vma
) -1)
5058 bfd_vma got_offset
, plt_offset
, plt_plt_offset
, plt_got_offset
;
5059 bfd_vma plt_plt_insn_end
, plt_got_insn_size
;
5060 Elf_Internal_Rela rela
;
5062 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
5063 const struct elf_backend_data
*bed
;
5064 bfd_vma plt_got_pcrel_offset
;
5066 /* When building a static executable, use .iplt, .igot.plt and
5067 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5068 if (htab
->elf
.splt
!= NULL
)
5070 plt
= htab
->elf
.splt
;
5071 gotplt
= htab
->elf
.sgotplt
;
5072 relplt
= htab
->elf
.srelplt
;
5076 plt
= htab
->elf
.iplt
;
5077 gotplt
= htab
->elf
.igotplt
;
5078 relplt
= htab
->elf
.irelplt
;
5081 /* This symbol has an entry in the procedure linkage table. Set
5083 if ((h
->dynindx
== -1
5084 && !((h
->forced_local
|| info
->executable
)
5086 && h
->type
== STT_GNU_IFUNC
))
5092 /* Get the index in the procedure linkage table which
5093 corresponds to this symbol. This is the index of this symbol
5094 in all the symbols for which we are making plt entries. The
5095 first entry in the procedure linkage table is reserved.
5097 Get the offset into the .got table of the entry that
5098 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5099 bytes. The first three are reserved for the dynamic linker.
5101 For static executables, we don't reserve anything. */
5103 if (plt
== htab
->elf
.splt
)
5105 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
5106 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
5110 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
5111 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
5114 plt_plt_insn_end
= abed
->plt_plt_insn_end
;
5115 plt_plt_offset
= abed
->plt_plt_offset
;
5116 plt_got_insn_size
= abed
->plt_got_insn_size
;
5117 plt_got_offset
= abed
->plt_got_offset
;
5120 /* Use the second PLT with BND relocations. */
5121 const bfd_byte
*plt_entry
, *plt2_entry
;
5123 if (eh
->has_bnd_reloc
)
5125 plt_entry
= elf_x86_64_bnd_plt_entry
;
5126 plt2_entry
= elf_x86_64_bnd_plt2_entry
;
5130 plt_entry
= elf_x86_64_legacy_plt_entry
;
5131 plt2_entry
= elf_x86_64_legacy_plt2_entry
;
5133 /* Subtract 1 since there is no BND prefix. */
5134 plt_plt_insn_end
-= 1;
5135 plt_plt_offset
-= 1;
5136 plt_got_insn_size
-= 1;
5137 plt_got_offset
-= 1;
5140 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry
)
5141 == sizeof (elf_x86_64_legacy_plt_entry
));
5143 /* Fill in the entry in the procedure linkage table. */
5144 memcpy (plt
->contents
+ h
->plt
.offset
,
5145 plt_entry
, sizeof (elf_x86_64_legacy_plt_entry
));
5146 /* Fill in the entry in the second PLT. */
5147 memcpy (htab
->plt_bnd
->contents
+ eh
->plt_bnd
.offset
,
5148 plt2_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5150 resolved_plt
= htab
->plt_bnd
;
5151 plt_offset
= eh
->plt_bnd
.offset
;
5155 /* Fill in the entry in the procedure linkage table. */
5156 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
5157 abed
->plt_entry_size
);
5160 plt_offset
= h
->plt
.offset
;
5163 /* Insert the relocation positions of the plt section. */
5165 /* Put offset the PC-relative instruction referring to the GOT entry,
5166 subtracting the size of that instruction. */
5167 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
5168 + gotplt
->output_offset
5170 - resolved_plt
->output_section
->vma
5171 - resolved_plt
->output_offset
5173 - plt_got_insn_size
);
5175 /* Check PC-relative offset overflow in PLT entry. */
5176 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
5177 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5178 output_bfd
, h
->root
.root
.string
);
5180 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
5181 resolved_plt
->contents
+ plt_offset
+ plt_got_offset
);
5183 /* Fill in the entry in the global offset table, initially this
5184 points to the second part of the PLT entry. */
5185 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5186 + plt
->output_offset
5187 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
5188 gotplt
->contents
+ got_offset
);
5190 /* Fill in the entry in the .rela.plt section. */
5191 rela
.r_offset
= (gotplt
->output_section
->vma
5192 + gotplt
->output_offset
5194 if (h
->dynindx
== -1
5195 || ((info
->executable
5196 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5198 && h
->type
== STT_GNU_IFUNC
))
5200 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5201 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5202 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
5203 rela
.r_addend
= (h
->root
.u
.def
.value
5204 + h
->root
.u
.def
.section
->output_section
->vma
5205 + h
->root
.u
.def
.section
->output_offset
);
5206 /* R_X86_64_IRELATIVE comes last. */
5207 plt_index
= htab
->next_irelative_index
--;
5211 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
5213 plt_index
= htab
->next_jump_slot_index
++;
5216 /* Don't fill PLT entry for static executables. */
5217 if (plt
== htab
->elf
.splt
)
5219 bfd_vma plt0_offset
= h
->plt
.offset
+ plt_plt_insn_end
;
5221 /* Put relocation index. */
5222 bfd_put_32 (output_bfd
, plt_index
,
5223 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
5225 /* Put offset for jmp .PLT0 and check for overflow. We don't
5226 check relocation index for overflow since branch displacement
5227 will overflow first. */
5228 if (plt0_offset
> 0x80000000)
5229 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5230 output_bfd
, h
->root
.root
.string
);
5231 bfd_put_32 (output_bfd
, - plt0_offset
,
5232 plt
->contents
+ h
->plt
.offset
+ plt_plt_offset
);
5235 bed
= get_elf_backend_data (output_bfd
);
5236 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
5237 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
5239 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5241 bfd_vma got_offset
, plt_offset
, plt_got_offset
, plt_got_insn_size
;
5242 asection
*plt
, *got
;
5243 bfd_boolean got_after_plt
;
5244 int32_t got_pcrel_offset
;
5245 const bfd_byte
*got_plt_entry
;
5247 /* Set the entry in the GOT procedure linkage table. */
5248 plt
= htab
->plt_got
;
5249 got
= htab
->elf
.sgot
;
5250 got_offset
= h
->got
.offset
;
5252 if (got_offset
== (bfd_vma
) -1
5253 || h
->type
== STT_GNU_IFUNC
5258 /* Use the second PLT entry template for the GOT PLT since they
5259 are the identical. */
5260 plt_got_insn_size
= elf_x86_64_bnd_arch_bed
.plt_got_insn_size
;
5261 plt_got_offset
= elf_x86_64_bnd_arch_bed
.plt_got_offset
;
5262 if (eh
->has_bnd_reloc
)
5263 got_plt_entry
= elf_x86_64_bnd_plt2_entry
;
5266 got_plt_entry
= elf_x86_64_legacy_plt2_entry
;
5268 /* Subtract 1 since there is no BND prefix. */
5269 plt_got_insn_size
-= 1;
5270 plt_got_offset
-= 1;
5273 /* Fill in the entry in the GOT procedure linkage table. */
5274 plt_offset
= eh
->plt_got
.offset
;
5275 memcpy (plt
->contents
+ plt_offset
,
5276 got_plt_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5278 /* Put offset the PC-relative instruction referring to the GOT
5279 entry, subtracting the size of that instruction. */
5280 got_pcrel_offset
= (got
->output_section
->vma
5281 + got
->output_offset
5283 - plt
->output_section
->vma
5284 - plt
->output_offset
5286 - plt_got_insn_size
);
5288 /* Check PC-relative offset overflow in GOT PLT entry. */
5289 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
5290 if ((got_after_plt
&& got_pcrel_offset
< 0)
5291 || (!got_after_plt
&& got_pcrel_offset
> 0))
5292 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5293 output_bfd
, h
->root
.root
.string
);
5295 bfd_put_32 (output_bfd
, got_pcrel_offset
,
5296 plt
->contents
+ plt_offset
+ plt_got_offset
);
5300 && (h
->plt
.offset
!= (bfd_vma
) -1
5301 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5303 /* Mark the symbol as undefined, rather than as defined in
5304 the .plt section. Leave the value if there were any
5305 relocations where pointer equality matters (this is a clue
5306 for the dynamic linker, to make function pointer
5307 comparisons work between an application and shared
5308 library), otherwise set it to zero. If a function is only
5309 called from a binary, there is no need to slow down
5310 shared libraries because of that. */
5311 sym
->st_shndx
= SHN_UNDEF
;
5312 if (!h
->pointer_equality_needed
)
5316 if (h
->got
.offset
!= (bfd_vma
) -1
5317 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
5318 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
5320 Elf_Internal_Rela rela
;
5322 /* This symbol has an entry in the global offset table. Set it
5324 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5327 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5328 + htab
->elf
.sgot
->output_offset
5329 + (h
->got
.offset
&~ (bfd_vma
) 1));
5331 /* If this is a static link, or it is a -Bsymbolic link and the
5332 symbol is defined locally or was forced to be local because
5333 of a version file, we just want to emit a RELATIVE reloc.
5334 The entry in the global offset table will already have been
5335 initialized in the relocate_section function. */
5337 && h
->type
== STT_GNU_IFUNC
)
5341 /* Generate R_X86_64_GLOB_DAT. */
5348 if (!h
->pointer_equality_needed
)
5351 /* For non-shared object, we can't use .got.plt, which
5352 contains the real function addres if we need pointer
5353 equality. We load the GOT entry with the PLT entry. */
5354 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5355 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5356 + plt
->output_offset
5358 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5362 else if (info
->shared
5363 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5365 if (!h
->def_regular
)
5367 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5368 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
5369 rela
.r_addend
= (h
->root
.u
.def
.value
5370 + h
->root
.u
.def
.section
->output_section
->vma
5371 + h
->root
.u
.def
.section
->output_offset
);
5375 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5377 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5378 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5379 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
5383 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
5388 Elf_Internal_Rela rela
;
5390 /* This symbol needs a copy reloc. Set it up. */
5392 if (h
->dynindx
== -1
5393 || (h
->root
.type
!= bfd_link_hash_defined
5394 && h
->root
.type
!= bfd_link_hash_defweak
)
5395 || htab
->srelbss
== NULL
)
5398 rela
.r_offset
= (h
->root
.u
.def
.value
5399 + h
->root
.u
.def
.section
->output_section
->vma
5400 + h
->root
.u
.def
.section
->output_offset
);
5401 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
5403 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
5409 /* Finish up local dynamic symbol handling. We set the contents of
5410 various dynamic sections here. */
5413 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
5415 struct elf_link_hash_entry
*h
5416 = (struct elf_link_hash_entry
*) *slot
;
5417 struct bfd_link_info
*info
5418 = (struct bfd_link_info
*) inf
;
5420 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
5424 /* Used to decide how to sort relocs in an optimal manner for the
5425 dynamic linker, before writing them out. */
5427 static enum elf_reloc_type_class
5428 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5429 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5430 const Elf_Internal_Rela
*rela
)
5432 switch ((int) ELF32_R_TYPE (rela
->r_info
))
5434 case R_X86_64_RELATIVE
:
5435 case R_X86_64_RELATIVE64
:
5436 return reloc_class_relative
;
5437 case R_X86_64_JUMP_SLOT
:
5438 return reloc_class_plt
;
5440 return reloc_class_copy
;
5442 return reloc_class_normal
;
5446 /* Finish up the dynamic sections. */
5449 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
5450 struct bfd_link_info
*info
)
5452 struct elf_x86_64_link_hash_table
*htab
;
5455 const struct elf_x86_64_backend_data
*abed
;
5457 htab
= elf_x86_64_hash_table (info
);
5461 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5462 section only if there is .plt section. */
5463 abed
= (htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
5464 ? &elf_x86_64_bnd_arch_bed
5465 : get_elf_x86_64_backend_data (output_bfd
));
5467 dynobj
= htab
->elf
.dynobj
;
5468 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5470 if (htab
->elf
.dynamic_sections_created
)
5472 bfd_byte
*dyncon
, *dynconend
;
5473 const struct elf_backend_data
*bed
;
5474 bfd_size_type sizeof_dyn
;
5476 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5479 bed
= get_elf_backend_data (dynobj
);
5480 sizeof_dyn
= bed
->s
->sizeof_dyn
;
5481 dyncon
= sdyn
->contents
;
5482 dynconend
= sdyn
->contents
+ sdyn
->size
;
5483 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
5485 Elf_Internal_Dyn dyn
;
5488 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
5496 s
= htab
->elf
.sgotplt
;
5497 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5501 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
5505 s
= htab
->elf
.srelplt
->output_section
;
5506 dyn
.d_un
.d_val
= s
->size
;
5510 /* The procedure linkage table relocs (DT_JMPREL) should
5511 not be included in the overall relocs (DT_RELA).
5512 Therefore, we override the DT_RELASZ entry here to
5513 make it not include the JMPREL relocs. Since the
5514 linker script arranges for .rela.plt to follow all
5515 other relocation sections, we don't have to worry
5516 about changing the DT_RELA entry. */
5517 if (htab
->elf
.srelplt
!= NULL
)
5519 s
= htab
->elf
.srelplt
->output_section
;
5520 dyn
.d_un
.d_val
-= s
->size
;
5524 case DT_TLSDESC_PLT
:
5526 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5527 + htab
->tlsdesc_plt
;
5530 case DT_TLSDESC_GOT
:
5532 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5533 + htab
->tlsdesc_got
;
5537 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
5540 /* Fill in the special first entry in the procedure linkage table. */
5541 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5543 /* Fill in the first entry in the procedure linkage table. */
5544 memcpy (htab
->elf
.splt
->contents
,
5545 abed
->plt0_entry
, abed
->plt_entry_size
);
5546 /* Add offset for pushq GOT+8(%rip), since the instruction
5547 uses 6 bytes subtract this value. */
5548 bfd_put_32 (output_bfd
,
5549 (htab
->elf
.sgotplt
->output_section
->vma
5550 + htab
->elf
.sgotplt
->output_offset
5552 - htab
->elf
.splt
->output_section
->vma
5553 - htab
->elf
.splt
->output_offset
5555 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
5556 /* Add offset for the PC-relative instruction accessing GOT+16,
5557 subtracting the offset to the end of that instruction. */
5558 bfd_put_32 (output_bfd
,
5559 (htab
->elf
.sgotplt
->output_section
->vma
5560 + htab
->elf
.sgotplt
->output_offset
5562 - htab
->elf
.splt
->output_section
->vma
5563 - htab
->elf
.splt
->output_offset
5564 - abed
->plt0_got2_insn_end
),
5565 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
5567 elf_section_data (htab
->elf
.splt
->output_section
)
5568 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
5570 if (htab
->tlsdesc_plt
)
5572 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5573 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
5575 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
5576 abed
->plt0_entry
, abed
->plt_entry_size
);
5578 /* Add offset for pushq GOT+8(%rip), since the
5579 instruction uses 6 bytes subtract this value. */
5580 bfd_put_32 (output_bfd
,
5581 (htab
->elf
.sgotplt
->output_section
->vma
5582 + htab
->elf
.sgotplt
->output_offset
5584 - htab
->elf
.splt
->output_section
->vma
5585 - htab
->elf
.splt
->output_offset
5588 htab
->elf
.splt
->contents
5589 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
5590 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5591 where TGD stands for htab->tlsdesc_got, subtracting the offset
5592 to the end of that instruction. */
5593 bfd_put_32 (output_bfd
,
5594 (htab
->elf
.sgot
->output_section
->vma
5595 + htab
->elf
.sgot
->output_offset
5597 - htab
->elf
.splt
->output_section
->vma
5598 - htab
->elf
.splt
->output_offset
5600 - abed
->plt0_got2_insn_end
),
5601 htab
->elf
.splt
->contents
5602 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
5607 if (htab
->plt_bnd
!= NULL
)
5608 elf_section_data (htab
->plt_bnd
->output_section
)
5609 ->this_hdr
.sh_entsize
= sizeof (elf_x86_64_bnd_plt2_entry
);
5611 if (htab
->elf
.sgotplt
)
5613 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5615 (*_bfd_error_handler
)
5616 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5620 /* Fill in the first three entries in the global offset table. */
5621 if (htab
->elf
.sgotplt
->size
> 0)
5623 /* Set the first entry in the global offset table to the address of
5624 the dynamic section. */
5626 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
5628 bfd_put_64 (output_bfd
,
5629 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5630 htab
->elf
.sgotplt
->contents
);
5631 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5632 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
5633 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
5636 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
5640 /* Adjust .eh_frame for .plt section. */
5641 if (htab
->plt_eh_frame
!= NULL
5642 && htab
->plt_eh_frame
->contents
!= NULL
)
5644 if (htab
->elf
.splt
!= NULL
5645 && htab
->elf
.splt
->size
!= 0
5646 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5647 && htab
->elf
.splt
->output_section
!= NULL
5648 && htab
->plt_eh_frame
->output_section
!= NULL
)
5650 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5651 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5652 + htab
->plt_eh_frame
->output_offset
5653 + PLT_FDE_START_OFFSET
;
5654 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5655 htab
->plt_eh_frame
->contents
5656 + PLT_FDE_START_OFFSET
);
5658 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5660 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5662 htab
->plt_eh_frame
->contents
))
5667 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5668 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
5671 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5672 htab_traverse (htab
->loc_hash_table
,
5673 elf_x86_64_finish_local_dynamic_symbol
,
5679 /* Return an array of PLT entry symbol values. */
5682 elf_x86_64_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5685 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5688 bfd_vma
*plt_sym_val
;
5690 bfd_byte
*plt_contents
;
5691 const struct elf_x86_64_backend_data
*bed
;
5692 Elf_Internal_Shdr
*hdr
;
5695 /* Get the .plt section contents. PLT passed down may point to the
5696 .plt.bnd section. Make sure that PLT always points to the .plt
5698 plt_bnd
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5703 plt
= bfd_get_section_by_name (abfd
, ".plt");
5706 bed
= &elf_x86_64_bnd_arch_bed
;
5709 bed
= get_elf_x86_64_backend_data (abfd
);
5711 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5712 if (plt_contents
== NULL
)
5714 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5715 plt_contents
, 0, plt
->size
))
5718 free (plt_contents
);
5722 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5723 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5726 hdr
= &elf_section_data (relplt
)->this_hdr
;
5727 count
= relplt
->size
/ hdr
->sh_entsize
;
5729 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5730 if (plt_sym_val
== NULL
)
5733 for (i
= 0; i
< count
; i
++)
5734 plt_sym_val
[i
] = -1;
5736 plt_offset
= bed
->plt_entry_size
;
5737 p
= relplt
->relocation
;
5738 for (i
= 0; i
< count
; i
++, p
++)
5742 /* Skip unknown relocation. */
5743 if (p
->howto
== NULL
)
5746 if (p
->howto
->type
!= R_X86_64_JUMP_SLOT
5747 && p
->howto
->type
!= R_X86_64_IRELATIVE
)
5750 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5751 + bed
->plt_reloc_offset
));
5752 if (reloc_index
>= count
)
5756 /* This is the index in .plt section. */
5757 long plt_index
= plt_offset
/ bed
->plt_entry_size
;
5758 /* Store VMA + the offset in .plt.bnd section. */
5759 plt_sym_val
[reloc_index
] =
5761 + (plt_index
- 1) * sizeof (elf_x86_64_legacy_plt2_entry
));
5764 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5765 plt_offset
+= bed
->plt_entry_size
;
5767 /* PR binutils/18437: Skip extra relocations in the .rela.plt
5769 if (plt_offset
>= plt
->size
)
5773 free (plt_contents
);
5778 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5782 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
5789 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
5790 as PLT if it exists. */
5791 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5793 plt
= bfd_get_section_by_name (abfd
, ".plt");
5794 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5795 dynsymcount
, dynsyms
, ret
,
5797 elf_x86_64_get_plt_sym_val
);
5800 /* Handle an x86-64 specific section when reading an object file. This
5801 is called when elfcode.h finds a section with an unknown type. */
5804 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
5805 const char *name
, int shindex
)
5807 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
5810 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
5816 /* Hook called by the linker routine which adds symbols from an object
5817 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5821 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5822 struct bfd_link_info
*info
,
5823 Elf_Internal_Sym
*sym
,
5824 const char **namep ATTRIBUTE_UNUSED
,
5825 flagword
*flagsp ATTRIBUTE_UNUSED
,
5831 switch (sym
->st_shndx
)
5833 case SHN_X86_64_LCOMMON
:
5834 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5837 lcomm
= bfd_make_section_with_flags (abfd
,
5841 | SEC_LINKER_CREATED
));
5844 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5847 *valp
= sym
->st_size
;
5851 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5852 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5853 && (abfd
->flags
& DYNAMIC
) == 0
5854 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5855 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5861 /* Given a BFD section, try to locate the corresponding ELF section
5865 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5866 asection
*sec
, int *index_return
)
5868 if (sec
== &_bfd_elf_large_com_section
)
5870 *index_return
= SHN_X86_64_LCOMMON
;
5876 /* Process a symbol. */
5879 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5882 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5884 switch (elfsym
->internal_elf_sym
.st_shndx
)
5886 case SHN_X86_64_LCOMMON
:
5887 asym
->section
= &_bfd_elf_large_com_section
;
5888 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5889 /* Common symbol doesn't set BSF_GLOBAL. */
5890 asym
->flags
&= ~BSF_GLOBAL
;
5896 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5898 return (sym
->st_shndx
== SHN_COMMON
5899 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5903 elf_x86_64_common_section_index (asection
*sec
)
5905 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5908 return SHN_X86_64_LCOMMON
;
5912 elf_x86_64_common_section (asection
*sec
)
5914 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5915 return bfd_com_section_ptr
;
5917 return &_bfd_elf_large_com_section
;
5921 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5922 const Elf_Internal_Sym
*sym
,
5927 const asection
*oldsec
)
5929 /* A normal common symbol and a large common symbol result in a
5930 normal common symbol. We turn the large common symbol into a
5933 && h
->root
.type
== bfd_link_hash_common
5935 && bfd_is_com_section (*psec
)
5938 if (sym
->st_shndx
== SHN_COMMON
5939 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5941 h
->root
.u
.c
.p
->section
5942 = bfd_make_section_old_way (oldbfd
, "COMMON");
5943 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5945 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5946 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5947 *psec
= bfd_com_section_ptr
;
5954 elf_x86_64_additional_program_headers (bfd
*abfd
,
5955 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5960 /* Check to see if we need a large readonly segment. */
5961 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5962 if (s
&& (s
->flags
& SEC_LOAD
))
5965 /* Check to see if we need a large data segment. Since .lbss sections
5966 is placed right after the .bss section, there should be no need for
5967 a large data segment just because of .lbss. */
5968 s
= bfd_get_section_by_name (abfd
, ".ldata");
5969 if (s
&& (s
->flags
& SEC_LOAD
))
5975 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5978 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5980 if (h
->plt
.offset
!= (bfd_vma
) -1
5982 && !h
->pointer_equality_needed
)
5985 return _bfd_elf_hash_symbol (h
);
5988 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5991 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5992 const bfd_target
*output
)
5994 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5995 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5996 && _bfd_elf_relocs_compatible (input
, output
));
5999 static const struct bfd_elf_special_section
6000 elf_x86_64_special_sections
[]=
6002 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6003 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
6004 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
6005 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6006 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
6007 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
6008 { NULL
, 0, 0, 0, 0 }
6011 #define TARGET_LITTLE_SYM x86_64_elf64_vec
6012 #define TARGET_LITTLE_NAME "elf64-x86-64"
6013 #define ELF_ARCH bfd_arch_i386
6014 #define ELF_TARGET_ID X86_64_ELF_DATA
6015 #define ELF_MACHINE_CODE EM_X86_64
6016 #define ELF_MAXPAGESIZE 0x200000
6017 #define ELF_MINPAGESIZE 0x1000
6018 #define ELF_COMMONPAGESIZE 0x1000
6020 #define elf_backend_can_gc_sections 1
6021 #define elf_backend_can_refcount 1
6022 #define elf_backend_want_got_plt 1
6023 #define elf_backend_plt_readonly 1
6024 #define elf_backend_want_plt_sym 0
6025 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
6026 #define elf_backend_rela_normal 1
6027 #define elf_backend_plt_alignment 4
6028 #define elf_backend_extern_protected_data 1
6030 #define elf_info_to_howto elf_x86_64_info_to_howto
6032 #define bfd_elf64_bfd_link_hash_table_create \
6033 elf_x86_64_link_hash_table_create
6034 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
6035 #define bfd_elf64_bfd_reloc_name_lookup \
6036 elf_x86_64_reloc_name_lookup
6038 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
6039 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
6040 #define elf_backend_check_relocs elf_x86_64_check_relocs
6041 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
6042 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
6043 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6044 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6045 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
6046 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
6047 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6048 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
6050 #define elf_backend_write_core_note elf_x86_64_write_core_note
6052 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6053 #define elf_backend_relocate_section elf_x86_64_relocate_section
6054 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6055 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
6056 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
6057 #define elf_backend_object_p elf64_x86_64_elf_object_p
6058 #define bfd_elf64_mkobject elf_x86_64_mkobject
6059 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
6061 #define elf_backend_section_from_shdr \
6062 elf_x86_64_section_from_shdr
6064 #define elf_backend_section_from_bfd_section \
6065 elf_x86_64_elf_section_from_bfd_section
6066 #define elf_backend_add_symbol_hook \
6067 elf_x86_64_add_symbol_hook
6068 #define elf_backend_symbol_processing \
6069 elf_x86_64_symbol_processing
6070 #define elf_backend_common_section_index \
6071 elf_x86_64_common_section_index
6072 #define elf_backend_common_section \
6073 elf_x86_64_common_section
6074 #define elf_backend_common_definition \
6075 elf_x86_64_common_definition
6076 #define elf_backend_merge_symbol \
6077 elf_x86_64_merge_symbol
6078 #define elf_backend_special_sections \
6079 elf_x86_64_special_sections
6080 #define elf_backend_additional_program_headers \
6081 elf_x86_64_additional_program_headers
6082 #define elf_backend_hash_symbol \
6083 elf_x86_64_hash_symbol
6085 #include "elf64-target.h"
6087 /* CloudABI support. */
6089 #undef TARGET_LITTLE_SYM
6090 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6091 #undef TARGET_LITTLE_NAME
6092 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6095 #define ELF_OSABI ELFOSABI_CLOUDABI
6098 #define elf64_bed elf64_x86_64_cloudabi_bed
6100 #include "elf64-target.h"
6102 /* FreeBSD support. */
6104 #undef TARGET_LITTLE_SYM
6105 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
6106 #undef TARGET_LITTLE_NAME
6107 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6110 #define ELF_OSABI ELFOSABI_FREEBSD
6113 #define elf64_bed elf64_x86_64_fbsd_bed
6115 #include "elf64-target.h"
6117 /* Solaris 2 support. */
6119 #undef TARGET_LITTLE_SYM
6120 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
6121 #undef TARGET_LITTLE_NAME
6122 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6124 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6125 objects won't be recognized. */
6129 #define elf64_bed elf64_x86_64_sol2_bed
6131 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6133 #undef elf_backend_static_tls_alignment
6134 #define elf_backend_static_tls_alignment 16
6136 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6138 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6140 #undef elf_backend_want_plt_sym
6141 #define elf_backend_want_plt_sym 1
6143 #include "elf64-target.h"
6145 /* Native Client support. */
6148 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
6150 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6151 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
6155 #undef TARGET_LITTLE_SYM
6156 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6157 #undef TARGET_LITTLE_NAME
6158 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6160 #define elf64_bed elf64_x86_64_nacl_bed
6162 #undef ELF_MAXPAGESIZE
6163 #undef ELF_MINPAGESIZE
6164 #undef ELF_COMMONPAGESIZE
6165 #define ELF_MAXPAGESIZE 0x10000
6166 #define ELF_MINPAGESIZE 0x10000
6167 #define ELF_COMMONPAGESIZE 0x10000
6169 /* Restore defaults. */
6171 #undef elf_backend_static_tls_alignment
6172 #undef elf_backend_want_plt_sym
6173 #define elf_backend_want_plt_sym 0
6175 /* NaCl uses substantially different PLT entries for the same effects. */
6177 #undef elf_backend_plt_alignment
6178 #define elf_backend_plt_alignment 5
6179 #define NACL_PLT_ENTRY_SIZE 64
6180 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6182 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
6184 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6185 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6186 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6187 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6188 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6190 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6191 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6193 /* 32 bytes of nop to pad out to the standard size. */
6194 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6195 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6196 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6197 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6198 0x66, /* excess data32 prefix */
6202 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6204 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6205 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6206 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6207 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6209 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6210 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6211 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6213 /* Lazy GOT entries point here (32-byte aligned). */
6214 0x68, /* pushq immediate */
6215 0, 0, 0, 0, /* replaced with index into relocation table. */
6216 0xe9, /* jmp relative */
6217 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6219 /* 22 bytes of nop to pad out to the standard size. */
6220 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6221 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6222 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6225 /* .eh_frame covering the .plt section. */
6227 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
6229 #if (PLT_CIE_LENGTH != 20 \
6230 || PLT_FDE_LENGTH != 36 \
6231 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6232 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6233 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6235 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6236 0, 0, 0, 0, /* CIE ID */
6237 1, /* CIE version */
6238 'z', 'R', 0, /* Augmentation string */
6239 1, /* Code alignment factor */
6240 0x78, /* Data alignment factor */
6241 16, /* Return address column */
6242 1, /* Augmentation size */
6243 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6244 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6245 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6246 DW_CFA_nop
, DW_CFA_nop
,
6248 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6249 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
6250 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6251 0, 0, 0, 0, /* .plt size goes here */
6252 0, /* Augmentation size */
6253 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
6254 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6255 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
6256 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6257 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6258 13, /* Block length */
6259 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
6260 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
6261 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6262 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
6263 DW_CFA_nop
, DW_CFA_nop
6266 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
6268 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
6269 elf_x86_64_nacl_plt_entry
, /* plt_entry */
6270 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6271 2, /* plt0_got1_offset */
6272 9, /* plt0_got2_offset */
6273 13, /* plt0_got2_insn_end */
6274 3, /* plt_got_offset */
6275 33, /* plt_reloc_offset */
6276 38, /* plt_plt_offset */
6277 7, /* plt_got_insn_size */
6278 42, /* plt_plt_insn_end */
6279 32, /* plt_lazy_offset */
6280 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
6281 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
6284 #undef elf_backend_arch_data
6285 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6287 #undef elf_backend_object_p
6288 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6289 #undef elf_backend_modify_segment_map
6290 #define elf_backend_modify_segment_map nacl_modify_segment_map
6291 #undef elf_backend_modify_program_headers
6292 #define elf_backend_modify_program_headers nacl_modify_program_headers
6293 #undef elf_backend_final_write_processing
6294 #define elf_backend_final_write_processing nacl_final_write_processing
6296 #include "elf64-target.h"
6298 /* Native Client x32 support. */
6301 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
6303 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6304 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
6308 #undef TARGET_LITTLE_SYM
6309 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6310 #undef TARGET_LITTLE_NAME
6311 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6313 #define elf32_bed elf32_x86_64_nacl_bed
6315 #define bfd_elf32_bfd_link_hash_table_create \
6316 elf_x86_64_link_hash_table_create
6317 #define bfd_elf32_bfd_reloc_type_lookup \
6318 elf_x86_64_reloc_type_lookup
6319 #define bfd_elf32_bfd_reloc_name_lookup \
6320 elf_x86_64_reloc_name_lookup
6321 #define bfd_elf32_mkobject \
6323 #define bfd_elf32_get_synthetic_symtab \
6324 elf_x86_64_get_synthetic_symtab
6326 #undef elf_backend_object_p
6327 #define elf_backend_object_p \
6328 elf32_x86_64_nacl_elf_object_p
6330 #undef elf_backend_bfd_from_remote_memory
6331 #define elf_backend_bfd_from_remote_memory \
6332 _bfd_elf32_bfd_from_remote_memory
6334 #undef elf_backend_size_info
6335 #define elf_backend_size_info \
6336 _bfd_elf32_size_info
6338 #include "elf32-target.h"
6340 /* Restore defaults. */
6341 #undef elf_backend_object_p
6342 #define elf_backend_object_p elf64_x86_64_elf_object_p
6343 #undef elf_backend_bfd_from_remote_memory
6344 #undef elf_backend_size_info
6345 #undef elf_backend_modify_segment_map
6346 #undef elf_backend_modify_program_headers
6347 #undef elf_backend_final_write_processing
6349 /* Intel L1OM support. */
6352 elf64_l1om_elf_object_p (bfd
*abfd
)
6354 /* Set the right machine number for an L1OM elf64 file. */
6355 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
6359 #undef TARGET_LITTLE_SYM
6360 #define TARGET_LITTLE_SYM l1om_elf64_vec
6361 #undef TARGET_LITTLE_NAME
6362 #define TARGET_LITTLE_NAME "elf64-l1om"
6364 #define ELF_ARCH bfd_arch_l1om
6366 #undef ELF_MACHINE_CODE
6367 #define ELF_MACHINE_CODE EM_L1OM
6372 #define elf64_bed elf64_l1om_bed
6374 #undef elf_backend_object_p
6375 #define elf_backend_object_p elf64_l1om_elf_object_p
6377 /* Restore defaults. */
6378 #undef ELF_MAXPAGESIZE
6379 #undef ELF_MINPAGESIZE
6380 #undef ELF_COMMONPAGESIZE
6381 #define ELF_MAXPAGESIZE 0x200000
6382 #define ELF_MINPAGESIZE 0x1000
6383 #define ELF_COMMONPAGESIZE 0x1000
6384 #undef elf_backend_plt_alignment
6385 #define elf_backend_plt_alignment 4
6386 #undef elf_backend_arch_data
6387 #define elf_backend_arch_data &elf_x86_64_arch_bed
6389 #include "elf64-target.h"
6391 /* FreeBSD L1OM support. */
6393 #undef TARGET_LITTLE_SYM
6394 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6395 #undef TARGET_LITTLE_NAME
6396 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6399 #define ELF_OSABI ELFOSABI_FREEBSD
6402 #define elf64_bed elf64_l1om_fbsd_bed
6404 #include "elf64-target.h"
6406 /* Intel K1OM support. */
6409 elf64_k1om_elf_object_p (bfd
*abfd
)
6411 /* Set the right machine number for an K1OM elf64 file. */
6412 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
6416 #undef TARGET_LITTLE_SYM
6417 #define TARGET_LITTLE_SYM k1om_elf64_vec
6418 #undef TARGET_LITTLE_NAME
6419 #define TARGET_LITTLE_NAME "elf64-k1om"
6421 #define ELF_ARCH bfd_arch_k1om
6423 #undef ELF_MACHINE_CODE
6424 #define ELF_MACHINE_CODE EM_K1OM
6429 #define elf64_bed elf64_k1om_bed
6431 #undef elf_backend_object_p
6432 #define elf_backend_object_p elf64_k1om_elf_object_p
6434 #undef elf_backend_static_tls_alignment
6436 #undef elf_backend_want_plt_sym
6437 #define elf_backend_want_plt_sym 0
6439 #include "elf64-target.h"
6441 /* FreeBSD K1OM support. */
6443 #undef TARGET_LITTLE_SYM
6444 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6445 #undef TARGET_LITTLE_NAME
6446 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6449 #define ELF_OSABI ELFOSABI_FREEBSD
6452 #define elf64_bed elf64_k1om_fbsd_bed
6454 #include "elf64-target.h"
6456 /* 32bit x86-64 support. */
6458 #undef TARGET_LITTLE_SYM
6459 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6460 #undef TARGET_LITTLE_NAME
6461 #define TARGET_LITTLE_NAME "elf32-x86-64"
6465 #define ELF_ARCH bfd_arch_i386
6467 #undef ELF_MACHINE_CODE
6468 #define ELF_MACHINE_CODE EM_X86_64
6472 #undef elf_backend_object_p
6473 #define elf_backend_object_p \
6474 elf32_x86_64_elf_object_p
6476 #undef elf_backend_bfd_from_remote_memory
6477 #define elf_backend_bfd_from_remote_memory \
6478 _bfd_elf32_bfd_from_remote_memory
6480 #undef elf_backend_size_info
6481 #define elf_backend_size_info \
6482 _bfd_elf32_size_info
6484 #include "elf32-target.h"