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 && h
->got
.refcount
> 0
2084 && htab
->plt_got
== NULL
)
2086 /* Create the GOT procedure linkage table. */
2087 unsigned int plt_got_align
;
2088 const struct elf_backend_data
*bed
;
2090 bed
= get_elf_backend_data (info
->output_bfd
);
2091 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry
) == 8
2092 && (sizeof (elf_x86_64_bnd_plt2_entry
)
2093 == sizeof (elf_x86_64_legacy_plt2_entry
)));
2096 if (htab
->elf
.dynobj
== NULL
)
2097 htab
->elf
.dynobj
= abfd
;
2099 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
2101 (bed
->dynamic_sec_flags
2106 if (htab
->plt_got
== NULL
2107 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
2113 if (r_type
== R_X86_64_GOTPCREL
2114 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2115 sec
->need_convert_mov_to_lea
= 1;
2121 /* Return the section that should be marked against GC for a given
2125 elf_x86_64_gc_mark_hook (asection
*sec
,
2126 struct bfd_link_info
*info
,
2127 Elf_Internal_Rela
*rel
,
2128 struct elf_link_hash_entry
*h
,
2129 Elf_Internal_Sym
*sym
)
2132 switch (ELF32_R_TYPE (rel
->r_info
))
2134 case R_X86_64_GNU_VTINHERIT
:
2135 case R_X86_64_GNU_VTENTRY
:
2139 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2142 /* Update the got entry reference counts for the section being removed. */
2145 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
2147 const Elf_Internal_Rela
*relocs
)
2149 struct elf_x86_64_link_hash_table
*htab
;
2150 Elf_Internal_Shdr
*symtab_hdr
;
2151 struct elf_link_hash_entry
**sym_hashes
;
2152 bfd_signed_vma
*local_got_refcounts
;
2153 const Elf_Internal_Rela
*rel
, *relend
;
2155 if (info
->relocatable
)
2158 htab
= elf_x86_64_hash_table (info
);
2162 elf_section_data (sec
)->local_dynrel
= NULL
;
2164 symtab_hdr
= &elf_symtab_hdr (abfd
);
2165 sym_hashes
= elf_sym_hashes (abfd
);
2166 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2168 htab
= elf_x86_64_hash_table (info
);
2169 relend
= relocs
+ sec
->reloc_count
;
2170 for (rel
= relocs
; rel
< relend
; rel
++)
2172 unsigned long r_symndx
;
2173 unsigned int r_type
;
2174 struct elf_link_hash_entry
*h
= NULL
;
2176 r_symndx
= htab
->r_sym (rel
->r_info
);
2177 if (r_symndx
>= symtab_hdr
->sh_info
)
2179 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2180 while (h
->root
.type
== bfd_link_hash_indirect
2181 || h
->root
.type
== bfd_link_hash_warning
)
2182 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2186 /* A local symbol. */
2187 Elf_Internal_Sym
*isym
;
2189 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2192 /* Check relocation against local STT_GNU_IFUNC symbol. */
2194 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2196 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2204 struct elf_x86_64_link_hash_entry
*eh
;
2205 struct elf_dyn_relocs
**pp
;
2206 struct elf_dyn_relocs
*p
;
2208 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2210 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2213 /* Everything must go for SEC. */
2219 r_type
= ELF32_R_TYPE (rel
->r_info
);
2220 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
2221 symtab_hdr
, sym_hashes
,
2222 &r_type
, GOT_UNKNOWN
,
2223 rel
, relend
, h
, r_symndx
))
2228 case R_X86_64_TLSLD
:
2229 if (htab
->tls_ld_got
.refcount
> 0)
2230 htab
->tls_ld_got
.refcount
-= 1;
2233 case R_X86_64_TLSGD
:
2234 case R_X86_64_GOTPC32_TLSDESC
:
2235 case R_X86_64_TLSDESC_CALL
:
2236 case R_X86_64_GOTTPOFF
:
2237 case R_X86_64_GOT32
:
2238 case R_X86_64_GOTPCREL
:
2239 case R_X86_64_GOT64
:
2240 case R_X86_64_GOTPCREL64
:
2241 case R_X86_64_GOTPLT64
:
2244 if (h
->got
.refcount
> 0)
2245 h
->got
.refcount
-= 1;
2246 if (h
->type
== STT_GNU_IFUNC
)
2248 if (h
->plt
.refcount
> 0)
2249 h
->plt
.refcount
-= 1;
2252 else if (local_got_refcounts
!= NULL
)
2254 if (local_got_refcounts
[r_symndx
] > 0)
2255 local_got_refcounts
[r_symndx
] -= 1;
2267 case R_X86_64_PC32_BND
:
2269 case R_X86_64_SIZE32
:
2270 case R_X86_64_SIZE64
:
2272 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2276 case R_X86_64_PLT32
:
2277 case R_X86_64_PLT32_BND
:
2278 case R_X86_64_PLTOFF64
:
2281 if (h
->plt
.refcount
> 0)
2282 h
->plt
.refcount
-= 1;
2294 /* Adjust a symbol defined by a dynamic object and referenced by a
2295 regular object. The current definition is in some section of the
2296 dynamic object, but we're not including those sections. We have to
2297 change the definition to something the rest of the link can
2301 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2302 struct elf_link_hash_entry
*h
)
2304 struct elf_x86_64_link_hash_table
*htab
;
2306 struct elf_x86_64_link_hash_entry
*eh
;
2307 struct elf_dyn_relocs
*p
;
2309 /* STT_GNU_IFUNC symbol must go through PLT. */
2310 if (h
->type
== STT_GNU_IFUNC
)
2312 /* All local STT_GNU_IFUNC references must be treate as local
2313 calls via local PLT. */
2315 && SYMBOL_CALLS_LOCAL (info
, h
))
2317 bfd_size_type pc_count
= 0, count
= 0;
2318 struct elf_dyn_relocs
**pp
;
2320 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2321 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2323 pc_count
+= p
->pc_count
;
2324 p
->count
-= p
->pc_count
;
2333 if (pc_count
|| count
)
2337 if (h
->plt
.refcount
<= 0)
2338 h
->plt
.refcount
= 1;
2340 h
->plt
.refcount
+= 1;
2344 if (h
->plt
.refcount
<= 0)
2346 h
->plt
.offset
= (bfd_vma
) -1;
2352 /* If this is a function, put it in the procedure linkage table. We
2353 will fill in the contents of the procedure linkage table later,
2354 when we know the address of the .got section. */
2355 if (h
->type
== STT_FUNC
2358 if (h
->plt
.refcount
<= 0
2359 || SYMBOL_CALLS_LOCAL (info
, h
)
2360 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2361 && h
->root
.type
== bfd_link_hash_undefweak
))
2363 /* This case can occur if we saw a PLT32 reloc in an input
2364 file, but the symbol was never referred to by a dynamic
2365 object, or if all references were garbage collected. In
2366 such a case, we don't actually need to build a procedure
2367 linkage table, and we can just do a PC32 reloc instead. */
2368 h
->plt
.offset
= (bfd_vma
) -1;
2375 /* It's possible that we incorrectly decided a .plt reloc was
2376 needed for an R_X86_64_PC32 reloc to a non-function sym in
2377 check_relocs. We can't decide accurately between function and
2378 non-function syms in check-relocs; Objects loaded later in
2379 the link may change h->type. So fix it now. */
2380 h
->plt
.offset
= (bfd_vma
) -1;
2382 /* If this is a weak symbol, and there is a real definition, the
2383 processor independent code will have arranged for us to see the
2384 real definition first, and we can just use the same value. */
2385 if (h
->u
.weakdef
!= NULL
)
2387 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2388 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2389 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2390 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2391 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2393 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2394 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2395 eh
->needs_copy
= h
->u
.weakdef
->needs_copy
;
2400 /* This is a reference to a symbol defined by a dynamic object which
2401 is not a function. */
2403 /* If we are creating a shared library, we must presume that the
2404 only references to the symbol are via the global offset table.
2405 For such cases we need not do anything here; the relocations will
2406 be handled correctly by relocate_section. */
2407 if (!info
->executable
)
2410 /* If there are no references to this symbol that do not use the
2411 GOT, we don't need to generate a copy reloc. */
2412 if (!h
->non_got_ref
)
2415 /* If -z nocopyreloc was given, we won't generate them either. */
2416 if (info
->nocopyreloc
)
2422 if (ELIMINATE_COPY_RELOCS
)
2424 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2425 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2427 s
= p
->sec
->output_section
;
2428 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2432 /* If we didn't find any dynamic relocs in read-only sections, then
2433 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2441 /* We must allocate the symbol in our .dynbss section, which will
2442 become part of the .bss section of the executable. There will be
2443 an entry for this symbol in the .dynsym section. The dynamic
2444 object will contain position independent code, so all references
2445 from the dynamic object to this symbol will go through the global
2446 offset table. The dynamic linker will use the .dynsym entry to
2447 determine the address it must put in the global offset table, so
2448 both the dynamic object and the regular object will refer to the
2449 same memory location for the variable. */
2451 htab
= elf_x86_64_hash_table (info
);
2455 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2456 to copy the initial value out of the dynamic object and into the
2457 runtime process image. */
2458 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2460 const struct elf_backend_data
*bed
;
2461 bed
= get_elf_backend_data (info
->output_bfd
);
2462 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2468 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2471 /* Allocate space in .plt, .got and associated reloc sections for
2475 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2477 struct bfd_link_info
*info
;
2478 struct elf_x86_64_link_hash_table
*htab
;
2479 struct elf_x86_64_link_hash_entry
*eh
;
2480 struct elf_dyn_relocs
*p
;
2481 const struct elf_backend_data
*bed
;
2482 unsigned int plt_entry_size
;
2484 if (h
->root
.type
== bfd_link_hash_indirect
)
2487 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2489 info
= (struct bfd_link_info
*) inf
;
2490 htab
= elf_x86_64_hash_table (info
);
2493 bed
= get_elf_backend_data (info
->output_bfd
);
2494 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2496 /* We can't use the GOT PLT if pointer equality is needed since
2497 finish_dynamic_symbol won't clear symbol value and the dynamic
2498 linker won't update the GOT slot. We will get into an infinite
2499 loop at run-time. */
2500 if (htab
->plt_got
!= NULL
2501 && h
->type
!= STT_GNU_IFUNC
2502 && !h
->pointer_equality_needed
2503 && h
->plt
.refcount
> 0
2504 && h
->got
.refcount
> 0)
2506 /* Don't use the regular PLT if there are both GOT and GOTPLT
2508 h
->plt
.offset
= (bfd_vma
) -1;
2510 /* Use the GOT PLT. */
2511 eh
->plt_got
.refcount
= 1;
2514 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2515 here if it is defined and referenced in a non-shared object. */
2516 if (h
->type
== STT_GNU_IFUNC
2519 if (_bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2525 asection
*s
= htab
->plt_bnd
;
2526 if (h
->plt
.offset
!= (bfd_vma
) -1 && s
!= NULL
)
2528 /* Use the .plt.bnd section if it is created. */
2529 eh
->plt_bnd
.offset
= s
->size
;
2531 /* Make room for this entry in the .plt.bnd section. */
2532 s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2540 else if (htab
->elf
.dynamic_sections_created
2541 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2543 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
2545 /* Make sure this symbol is output as a dynamic symbol.
2546 Undefined weak syms won't yet be marked as dynamic. */
2547 if (h
->dynindx
== -1
2548 && !h
->forced_local
)
2550 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2555 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2557 asection
*s
= htab
->elf
.splt
;
2558 asection
*bnd_s
= htab
->plt_bnd
;
2559 asection
*got_s
= htab
->plt_got
;
2561 /* If this is the first .plt entry, make room for the special
2564 s
->size
= plt_entry_size
;
2567 eh
->plt_got
.offset
= got_s
->size
;
2570 h
->plt
.offset
= s
->size
;
2572 eh
->plt_bnd
.offset
= bnd_s
->size
;
2575 /* If this symbol is not defined in a regular file, and we are
2576 not generating a shared library, then set the symbol to this
2577 location in the .plt. This is required to make function
2578 pointers compare as equal between the normal executable and
2579 the shared library. */
2585 /* We need to make a call to the entry of the GOT PLT
2586 instead of regular PLT entry. */
2587 h
->root
.u
.def
.section
= got_s
;
2588 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2594 /* We need to make a call to the entry of the second
2595 PLT instead of regular PLT entry. */
2596 h
->root
.u
.def
.section
= bnd_s
;
2597 h
->root
.u
.def
.value
= eh
->plt_bnd
.offset
;
2601 h
->root
.u
.def
.section
= s
;
2602 h
->root
.u
.def
.value
= h
->plt
.offset
;
2607 /* Make room for this entry. */
2609 got_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2612 s
->size
+= plt_entry_size
;
2614 bnd_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2616 /* We also need to make an entry in the .got.plt section,
2617 which will be placed in the .got section by the linker
2619 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2621 /* We also need to make an entry in the .rela.plt
2623 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2624 htab
->elf
.srelplt
->reloc_count
++;
2629 h
->plt
.offset
= (bfd_vma
) -1;
2635 h
->plt
.offset
= (bfd_vma
) -1;
2639 eh
->tlsdesc_got
= (bfd_vma
) -1;
2641 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2642 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2643 if (h
->got
.refcount
> 0
2646 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2648 h
->got
.offset
= (bfd_vma
) -1;
2650 else if (h
->got
.refcount
> 0)
2654 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2656 /* Make sure this symbol is output as a dynamic symbol.
2657 Undefined weak syms won't yet be marked as dynamic. */
2658 if (h
->dynindx
== -1
2659 && !h
->forced_local
)
2661 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2665 if (GOT_TLS_GDESC_P (tls_type
))
2667 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2668 - elf_x86_64_compute_jump_table_size (htab
);
2669 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2670 h
->got
.offset
= (bfd_vma
) -2;
2672 if (! GOT_TLS_GDESC_P (tls_type
)
2673 || GOT_TLS_GD_P (tls_type
))
2676 h
->got
.offset
= s
->size
;
2677 s
->size
+= GOT_ENTRY_SIZE
;
2678 if (GOT_TLS_GD_P (tls_type
))
2679 s
->size
+= GOT_ENTRY_SIZE
;
2681 dyn
= htab
->elf
.dynamic_sections_created
;
2682 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2684 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2685 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2686 || tls_type
== GOT_TLS_IE
)
2687 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2688 else if (GOT_TLS_GD_P (tls_type
))
2689 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2690 else if (! GOT_TLS_GDESC_P (tls_type
)
2691 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2692 || h
->root
.type
!= bfd_link_hash_undefweak
)
2694 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2695 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2696 if (GOT_TLS_GDESC_P (tls_type
))
2698 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2699 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2703 h
->got
.offset
= (bfd_vma
) -1;
2705 if (eh
->dyn_relocs
== NULL
)
2708 /* In the shared -Bsymbolic case, discard space allocated for
2709 dynamic pc-relative relocs against symbols which turn out to be
2710 defined in regular objects. For the normal shared case, discard
2711 space for pc-relative relocs that have become local due to symbol
2712 visibility changes. */
2716 /* Relocs that use pc_count are those that appear on a call
2717 insn, or certain REL relocs that can generated via assembly.
2718 We want calls to protected symbols to resolve directly to the
2719 function rather than going via the plt. If people want
2720 function pointer comparisons to work as expected then they
2721 should avoid writing weird assembly. */
2722 if (SYMBOL_CALLS_LOCAL (info
, h
))
2724 struct elf_dyn_relocs
**pp
;
2726 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2728 p
->count
-= p
->pc_count
;
2737 /* Also discard relocs on undefined weak syms with non-default
2739 if (eh
->dyn_relocs
!= NULL
)
2741 if (h
->root
.type
== bfd_link_hash_undefweak
)
2743 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2744 eh
->dyn_relocs
= NULL
;
2746 /* Make sure undefined weak symbols are output as a dynamic
2748 else if (h
->dynindx
== -1
2749 && ! h
->forced_local
2750 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2753 /* For PIE, discard space for pc-relative relocs against
2754 symbols which turn out to need copy relocs. */
2755 else if (info
->executable
2756 && (h
->needs_copy
|| eh
->needs_copy
)
2760 struct elf_dyn_relocs
**pp
;
2762 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2764 if (p
->pc_count
!= 0)
2772 else if (ELIMINATE_COPY_RELOCS
)
2774 /* For the non-shared case, discard space for relocs against
2775 symbols which turn out to need copy relocs or are not
2781 || (htab
->elf
.dynamic_sections_created
2782 && (h
->root
.type
== bfd_link_hash_undefweak
2783 || h
->root
.type
== bfd_link_hash_undefined
))))
2785 /* Make sure this symbol is output as a dynamic symbol.
2786 Undefined weak syms won't yet be marked as dynamic. */
2787 if (h
->dynindx
== -1
2788 && ! h
->forced_local
2789 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2792 /* If that succeeded, we know we'll be keeping all the
2794 if (h
->dynindx
!= -1)
2798 eh
->dyn_relocs
= NULL
;
2803 /* Finally, allocate space. */
2804 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2808 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2810 BFD_ASSERT (sreloc
!= NULL
);
2812 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2818 /* Allocate space in .plt, .got and associated reloc sections for
2819 local dynamic relocs. */
2822 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2824 struct elf_link_hash_entry
*h
2825 = (struct elf_link_hash_entry
*) *slot
;
2827 if (h
->type
!= STT_GNU_IFUNC
2831 || h
->root
.type
!= bfd_link_hash_defined
)
2834 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2837 /* Find any dynamic relocs that apply to read-only sections. */
2840 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2843 struct elf_x86_64_link_hash_entry
*eh
;
2844 struct elf_dyn_relocs
*p
;
2846 /* Skip local IFUNC symbols. */
2847 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2850 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2851 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2853 asection
*s
= p
->sec
->output_section
;
2855 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2857 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2859 info
->flags
|= DF_TEXTREL
;
2861 if ((info
->warn_shared_textrel
&& info
->shared
)
2862 || info
->error_textrel
)
2863 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2864 p
->sec
->owner
, h
->root
.root
.string
,
2867 /* Not an error, just cut short the traversal. */
2875 mov foo@GOTPCREL(%rip), %reg
2878 with the local symbol, foo. */
2881 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2882 struct bfd_link_info
*link_info
)
2884 Elf_Internal_Shdr
*symtab_hdr
;
2885 Elf_Internal_Rela
*internal_relocs
;
2886 Elf_Internal_Rela
*irel
, *irelend
;
2888 struct elf_x86_64_link_hash_table
*htab
;
2889 bfd_boolean changed_contents
;
2890 bfd_boolean changed_relocs
;
2891 bfd_signed_vma
*local_got_refcounts
;
2893 /* Don't even try to convert non-ELF outputs. */
2894 if (!is_elf_hash_table (link_info
->hash
))
2897 /* Nothing to do if there is no need or no output. */
2898 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2899 || sec
->need_convert_mov_to_lea
== 0
2900 || bfd_is_abs_section (sec
->output_section
))
2903 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2905 /* Load the relocations for this section. */
2906 internal_relocs
= (_bfd_elf_link_read_relocs
2907 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2908 link_info
->keep_memory
));
2909 if (internal_relocs
== NULL
)
2912 htab
= elf_x86_64_hash_table (link_info
);
2913 changed_contents
= FALSE
;
2914 changed_relocs
= FALSE
;
2915 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2917 /* Get the section contents. */
2918 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2919 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2922 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2926 irelend
= internal_relocs
+ sec
->reloc_count
;
2927 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2929 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2930 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2932 struct elf_link_hash_entry
*h
;
2934 if (r_type
!= R_X86_64_GOTPCREL
)
2937 /* Get the symbol referred to by the reloc. */
2938 if (r_symndx
< symtab_hdr
->sh_info
)
2940 Elf_Internal_Sym
*isym
;
2942 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2945 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2946 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2947 && irel
->r_offset
>= 2
2948 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2950 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2951 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2952 if (local_got_refcounts
!= NULL
2953 && local_got_refcounts
[r_symndx
] > 0)
2954 local_got_refcounts
[r_symndx
] -= 1;
2955 changed_contents
= TRUE
;
2956 changed_relocs
= TRUE
;
2961 indx
= r_symndx
- symtab_hdr
->sh_info
;
2962 h
= elf_sym_hashes (abfd
)[indx
];
2963 BFD_ASSERT (h
!= NULL
);
2965 while (h
->root
.type
== bfd_link_hash_indirect
2966 || h
->root
.type
== bfd_link_hash_warning
)
2967 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2969 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2970 avoid optimizing _DYNAMIC since ld.so may use its link-time
2973 && h
->type
!= STT_GNU_IFUNC
2974 && h
!= htab
->elf
.hdynamic
2975 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2976 && irel
->r_offset
>= 2
2977 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2979 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2980 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2981 if (h
->got
.refcount
> 0)
2982 h
->got
.refcount
-= 1;
2983 changed_contents
= TRUE
;
2984 changed_relocs
= TRUE
;
2988 if (contents
!= NULL
2989 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2991 if (!changed_contents
&& !link_info
->keep_memory
)
2995 /* Cache the section contents for elf_link_input_bfd. */
2996 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3000 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3002 if (!changed_relocs
)
3003 free (internal_relocs
);
3005 elf_section_data (sec
)->relocs
= internal_relocs
;
3011 if (contents
!= NULL
3012 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3014 if (internal_relocs
!= NULL
3015 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3016 free (internal_relocs
);
3020 /* Set the sizes of the dynamic sections. */
3023 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
3024 struct bfd_link_info
*info
)
3026 struct elf_x86_64_link_hash_table
*htab
;
3031 const struct elf_backend_data
*bed
;
3033 htab
= elf_x86_64_hash_table (info
);
3036 bed
= get_elf_backend_data (output_bfd
);
3038 dynobj
= htab
->elf
.dynobj
;
3042 if (htab
->elf
.dynamic_sections_created
)
3044 /* Set the contents of the .interp section to the interpreter. */
3045 if (info
->executable
)
3047 s
= bfd_get_linker_section (dynobj
, ".interp");
3050 s
->size
= htab
->dynamic_interpreter_size
;
3051 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
3055 /* Set up .got offsets for local syms, and space for local dynamic
3057 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3059 bfd_signed_vma
*local_got
;
3060 bfd_signed_vma
*end_local_got
;
3061 char *local_tls_type
;
3062 bfd_vma
*local_tlsdesc_gotent
;
3063 bfd_size_type locsymcount
;
3064 Elf_Internal_Shdr
*symtab_hdr
;
3067 if (! is_x86_64_elf (ibfd
))
3070 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3072 struct elf_dyn_relocs
*p
;
3074 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
3077 for (p
= (struct elf_dyn_relocs
*)
3078 (elf_section_data (s
)->local_dynrel
);
3082 if (!bfd_is_abs_section (p
->sec
)
3083 && bfd_is_abs_section (p
->sec
->output_section
))
3085 /* Input section has been discarded, either because
3086 it is a copy of a linkonce section or due to
3087 linker script /DISCARD/, so we'll be discarding
3090 else if (p
->count
!= 0)
3092 srel
= elf_section_data (p
->sec
)->sreloc
;
3093 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3094 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3095 && (info
->flags
& DF_TEXTREL
) == 0)
3097 info
->flags
|= DF_TEXTREL
;
3098 if ((info
->warn_shared_textrel
&& info
->shared
)
3099 || info
->error_textrel
)
3100 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3101 p
->sec
->owner
, p
->sec
);
3107 local_got
= elf_local_got_refcounts (ibfd
);
3111 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3112 locsymcount
= symtab_hdr
->sh_info
;
3113 end_local_got
= local_got
+ locsymcount
;
3114 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
3115 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
3117 srel
= htab
->elf
.srelgot
;
3118 for (; local_got
< end_local_got
;
3119 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3121 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3124 if (GOT_TLS_GDESC_P (*local_tls_type
))
3126 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3127 - elf_x86_64_compute_jump_table_size (htab
);
3128 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3129 *local_got
= (bfd_vma
) -2;
3131 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3132 || GOT_TLS_GD_P (*local_tls_type
))
3134 *local_got
= s
->size
;
3135 s
->size
+= GOT_ENTRY_SIZE
;
3136 if (GOT_TLS_GD_P (*local_tls_type
))
3137 s
->size
+= GOT_ENTRY_SIZE
;
3140 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3141 || *local_tls_type
== GOT_TLS_IE
)
3143 if (GOT_TLS_GDESC_P (*local_tls_type
))
3145 htab
->elf
.srelplt
->size
3146 += bed
->s
->sizeof_rela
;
3147 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3149 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3150 || GOT_TLS_GD_P (*local_tls_type
))
3151 srel
->size
+= bed
->s
->sizeof_rela
;
3155 *local_got
= (bfd_vma
) -1;
3159 if (htab
->tls_ld_got
.refcount
> 0)
3161 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3163 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
3164 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
3165 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3168 htab
->tls_ld_got
.offset
= -1;
3170 /* Allocate global sym .plt and .got entries, and space for global
3171 sym dynamic relocs. */
3172 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
3175 /* Allocate .plt and .got entries, and space for local symbols. */
3176 htab_traverse (htab
->loc_hash_table
,
3177 elf_x86_64_allocate_local_dynrelocs
,
3180 /* For every jump slot reserved in the sgotplt, reloc_count is
3181 incremented. However, when we reserve space for TLS descriptors,
3182 it's not incremented, so in order to compute the space reserved
3183 for them, it suffices to multiply the reloc count by the jump
3186 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3187 so that R_X86_64_IRELATIVE entries come last. */
3188 if (htab
->elf
.srelplt
)
3190 htab
->sgotplt_jump_table_size
3191 = elf_x86_64_compute_jump_table_size (htab
);
3192 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3194 else if (htab
->elf
.irelplt
)
3195 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3197 if (htab
->tlsdesc_plt
)
3199 /* If we're not using lazy TLS relocations, don't generate the
3200 PLT and GOT entries they require. */
3201 if ((info
->flags
& DF_BIND_NOW
))
3202 htab
->tlsdesc_plt
= 0;
3205 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
3206 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
3207 /* Reserve room for the initial entry.
3208 FIXME: we could probably do away with it in this case. */
3209 if (htab
->elf
.splt
->size
== 0)
3210 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3211 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
3212 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3216 if (htab
->elf
.sgotplt
)
3218 /* Don't allocate .got.plt section if there are no GOT nor PLT
3219 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3220 if ((htab
->elf
.hgot
== NULL
3221 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3222 && (htab
->elf
.sgotplt
->size
3223 == get_elf_backend_data (output_bfd
)->got_header_size
)
3224 && (htab
->elf
.splt
== NULL
3225 || htab
->elf
.splt
->size
== 0)
3226 && (htab
->elf
.sgot
== NULL
3227 || htab
->elf
.sgot
->size
== 0)
3228 && (htab
->elf
.iplt
== NULL
3229 || htab
->elf
.iplt
->size
== 0)
3230 && (htab
->elf
.igotplt
== NULL
3231 || htab
->elf
.igotplt
->size
== 0))
3232 htab
->elf
.sgotplt
->size
= 0;
3235 if (htab
->plt_eh_frame
!= NULL
3236 && htab
->elf
.splt
!= NULL
3237 && htab
->elf
.splt
->size
!= 0
3238 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3239 && _bfd_elf_eh_frame_present (info
))
3241 const struct elf_x86_64_backend_data
*arch_data
3242 = get_elf_x86_64_arch_data (bed
);
3243 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
3246 /* We now have determined the sizes of the various dynamic sections.
3247 Allocate memory for them. */
3249 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3251 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3254 if (s
== htab
->elf
.splt
3255 || s
== htab
->elf
.sgot
3256 || s
== htab
->elf
.sgotplt
3257 || s
== htab
->elf
.iplt
3258 || s
== htab
->elf
.igotplt
3259 || s
== htab
->plt_bnd
3260 || s
== htab
->plt_got
3261 || s
== htab
->plt_eh_frame
3262 || s
== htab
->sdynbss
)
3264 /* Strip this section if we don't need it; see the
3267 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
3269 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3272 /* We use the reloc_count field as a counter if we need
3273 to copy relocs into the output file. */
3274 if (s
!= htab
->elf
.srelplt
)
3279 /* It's not one of our sections, so don't allocate space. */
3285 /* If we don't need this section, strip it from the
3286 output file. This is mostly to handle .rela.bss and
3287 .rela.plt. We must create both sections in
3288 create_dynamic_sections, because they must be created
3289 before the linker maps input sections to output
3290 sections. The linker does that before
3291 adjust_dynamic_symbol is called, and it is that
3292 function which decides whether anything needs to go
3293 into these sections. */
3295 s
->flags
|= SEC_EXCLUDE
;
3299 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3302 /* Allocate memory for the section contents. We use bfd_zalloc
3303 here in case unused entries are not reclaimed before the
3304 section's contents are written out. This should not happen,
3305 but this way if it does, we get a R_X86_64_NONE reloc instead
3307 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3308 if (s
->contents
== NULL
)
3312 if (htab
->plt_eh_frame
!= NULL
3313 && htab
->plt_eh_frame
->contents
!= NULL
)
3315 const struct elf_x86_64_backend_data
*arch_data
3316 = get_elf_x86_64_arch_data (bed
);
3318 memcpy (htab
->plt_eh_frame
->contents
,
3319 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3320 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3321 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3324 if (htab
->elf
.dynamic_sections_created
)
3326 /* Add some entries to the .dynamic section. We fill in the
3327 values later, in elf_x86_64_finish_dynamic_sections, but we
3328 must add the entries now so that we get the correct size for
3329 the .dynamic section. The DT_DEBUG entry is filled in by the
3330 dynamic linker and used by the debugger. */
3331 #define add_dynamic_entry(TAG, VAL) \
3332 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3334 if (info
->executable
)
3336 if (!add_dynamic_entry (DT_DEBUG
, 0))
3340 if (htab
->elf
.splt
->size
!= 0)
3342 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3343 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3344 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3345 || !add_dynamic_entry (DT_JMPREL
, 0))
3348 if (htab
->tlsdesc_plt
3349 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3350 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3356 if (!add_dynamic_entry (DT_RELA
, 0)
3357 || !add_dynamic_entry (DT_RELASZ
, 0)
3358 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3361 /* If any dynamic relocs apply to a read-only section,
3362 then we need a DT_TEXTREL entry. */
3363 if ((info
->flags
& DF_TEXTREL
) == 0)
3364 elf_link_hash_traverse (&htab
->elf
,
3365 elf_x86_64_readonly_dynrelocs
,
3368 if ((info
->flags
& DF_TEXTREL
) != 0)
3370 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3375 #undef add_dynamic_entry
3381 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3382 struct bfd_link_info
*info
)
3384 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3388 struct elf_link_hash_entry
*tlsbase
;
3390 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3391 "_TLS_MODULE_BASE_",
3392 FALSE
, FALSE
, FALSE
);
3394 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3396 struct elf_x86_64_link_hash_table
*htab
;
3397 struct bfd_link_hash_entry
*bh
= NULL
;
3398 const struct elf_backend_data
*bed
3399 = get_elf_backend_data (output_bfd
);
3401 htab
= elf_x86_64_hash_table (info
);
3405 if (!(_bfd_generic_link_add_one_symbol
3406 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3407 tls_sec
, 0, NULL
, FALSE
,
3408 bed
->collect
, &bh
)))
3411 htab
->tls_module_base
= bh
;
3413 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3414 tlsbase
->def_regular
= 1;
3415 tlsbase
->other
= STV_HIDDEN
;
3416 tlsbase
->root
.linker_def
= 1;
3417 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3424 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3425 executables. Rather than setting it to the beginning of the TLS
3426 section, we have to set it to the end. This function may be called
3427 multiple times, it is idempotent. */
3430 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3432 struct elf_x86_64_link_hash_table
*htab
;
3433 struct bfd_link_hash_entry
*base
;
3435 if (!info
->executable
)
3438 htab
= elf_x86_64_hash_table (info
);
3442 base
= htab
->tls_module_base
;
3446 base
->u
.def
.value
= htab
->elf
.tls_size
;
3449 /* Return the base VMA address which should be subtracted from real addresses
3450 when resolving @dtpoff relocation.
3451 This is PT_TLS segment p_vaddr. */
3454 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3456 /* If tls_sec is NULL, we should have signalled an error already. */
3457 if (elf_hash_table (info
)->tls_sec
== NULL
)
3459 return elf_hash_table (info
)->tls_sec
->vma
;
3462 /* Return the relocation value for @tpoff relocation
3463 if STT_TLS virtual address is ADDRESS. */
3466 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3468 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3469 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3470 bfd_vma static_tls_size
;
3472 /* If tls_segment is NULL, we should have signalled an error already. */
3473 if (htab
->tls_sec
== NULL
)
3476 /* Consider special static TLS alignment requirements. */
3477 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3478 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3481 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3485 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3487 /* Opcode Instruction
3490 0x0f 0x8x conditional jump */
3492 && (contents
[offset
- 1] == 0xe8
3493 || contents
[offset
- 1] == 0xe9))
3495 && contents
[offset
- 2] == 0x0f
3496 && (contents
[offset
- 1] & 0xf0) == 0x80));
3499 /* Relocate an x86_64 ELF section. */
3502 elf_x86_64_relocate_section (bfd
*output_bfd
,
3503 struct bfd_link_info
*info
,
3505 asection
*input_section
,
3507 Elf_Internal_Rela
*relocs
,
3508 Elf_Internal_Sym
*local_syms
,
3509 asection
**local_sections
)
3511 struct elf_x86_64_link_hash_table
*htab
;
3512 Elf_Internal_Shdr
*symtab_hdr
;
3513 struct elf_link_hash_entry
**sym_hashes
;
3514 bfd_vma
*local_got_offsets
;
3515 bfd_vma
*local_tlsdesc_gotents
;
3516 Elf_Internal_Rela
*rel
;
3517 Elf_Internal_Rela
*relend
;
3518 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3520 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3522 htab
= elf_x86_64_hash_table (info
);
3525 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3526 sym_hashes
= elf_sym_hashes (input_bfd
);
3527 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3528 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3530 elf_x86_64_set_tls_module_base (info
);
3533 relend
= relocs
+ input_section
->reloc_count
;
3534 for (; rel
< relend
; rel
++)
3536 unsigned int r_type
;
3537 reloc_howto_type
*howto
;
3538 unsigned long r_symndx
;
3539 struct elf_link_hash_entry
*h
;
3540 struct elf_x86_64_link_hash_entry
*eh
;
3541 Elf_Internal_Sym
*sym
;
3543 bfd_vma off
, offplt
, plt_offset
;
3545 bfd_boolean unresolved_reloc
;
3546 bfd_reloc_status_type r
;
3548 asection
*base_got
, *resolved_plt
;
3551 r_type
= ELF32_R_TYPE (rel
->r_info
);
3552 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3553 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3556 if (r_type
>= (int) R_X86_64_standard
)
3558 (*_bfd_error_handler
)
3559 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3560 input_bfd
, input_section
, r_type
);
3561 bfd_set_error (bfd_error_bad_value
);
3565 if (r_type
!= (int) R_X86_64_32
3566 || ABI_64_P (output_bfd
))
3567 howto
= x86_64_elf_howto_table
+ r_type
;
3569 howto
= (x86_64_elf_howto_table
3570 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3571 r_symndx
= htab
->r_sym (rel
->r_info
);
3575 unresolved_reloc
= FALSE
;
3576 if (r_symndx
< symtab_hdr
->sh_info
)
3578 sym
= local_syms
+ r_symndx
;
3579 sec
= local_sections
[r_symndx
];
3581 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3583 st_size
= sym
->st_size
;
3585 /* Relocate against local STT_GNU_IFUNC symbol. */
3586 if (!info
->relocatable
3587 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3589 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3594 /* Set STT_GNU_IFUNC symbol value. */
3595 h
->root
.u
.def
.value
= sym
->st_value
;
3596 h
->root
.u
.def
.section
= sec
;
3601 bfd_boolean warned ATTRIBUTE_UNUSED
;
3602 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3604 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3605 r_symndx
, symtab_hdr
, sym_hashes
,
3607 unresolved_reloc
, warned
, ignored
);
3611 if (sec
!= NULL
&& discarded_section (sec
))
3612 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3613 rel
, 1, relend
, howto
, 0, contents
);
3615 if (info
->relocatable
)
3618 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3620 if (r_type
== R_X86_64_64
)
3622 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3623 zero-extend it to 64bit if addend is zero. */
3624 r_type
= R_X86_64_32
;
3625 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3627 else if (r_type
== R_X86_64_SIZE64
)
3629 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3630 zero-extend it to 64bit if addend is zero. */
3631 r_type
= R_X86_64_SIZE32
;
3632 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3636 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3638 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3639 it here if it is defined in a non-shared object. */
3641 && h
->type
== STT_GNU_IFUNC
3647 if ((input_section
->flags
& SEC_ALLOC
) == 0
3648 || h
->plt
.offset
== (bfd_vma
) -1)
3651 /* STT_GNU_IFUNC symbol must go through PLT. */
3652 if (htab
->elf
.splt
!= NULL
)
3654 if (htab
->plt_bnd
!= NULL
)
3656 resolved_plt
= htab
->plt_bnd
;
3657 plt_offset
= eh
->plt_bnd
.offset
;
3661 resolved_plt
= htab
->elf
.splt
;
3662 plt_offset
= h
->plt
.offset
;
3667 resolved_plt
= htab
->elf
.iplt
;
3668 plt_offset
= h
->plt
.offset
;
3671 relocation
= (resolved_plt
->output_section
->vma
3672 + resolved_plt
->output_offset
+ plt_offset
);
3677 if (h
->root
.root
.string
)
3678 name
= h
->root
.root
.string
;
3680 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3682 (*_bfd_error_handler
)
3683 (_("%B: relocation %s against STT_GNU_IFUNC "
3684 "symbol `%s' isn't handled by %s"), input_bfd
,
3685 x86_64_elf_howto_table
[r_type
].name
,
3686 name
, __FUNCTION__
);
3687 bfd_set_error (bfd_error_bad_value
);
3696 if (ABI_64_P (output_bfd
))
3700 if (rel
->r_addend
!= 0)
3702 if (h
->root
.root
.string
)
3703 name
= h
->root
.root
.string
;
3705 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3707 (*_bfd_error_handler
)
3708 (_("%B: relocation %s against STT_GNU_IFUNC "
3709 "symbol `%s' has non-zero addend: %d"),
3710 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3711 name
, rel
->r_addend
);
3712 bfd_set_error (bfd_error_bad_value
);
3716 /* Generate dynamic relcoation only when there is a
3717 non-GOT reference in a shared object. */
3718 if (info
->shared
&& h
->non_got_ref
)
3720 Elf_Internal_Rela outrel
;
3723 /* Need a dynamic relocation to get the real function
3725 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3729 if (outrel
.r_offset
== (bfd_vma
) -1
3730 || outrel
.r_offset
== (bfd_vma
) -2)
3733 outrel
.r_offset
+= (input_section
->output_section
->vma
3734 + input_section
->output_offset
);
3736 if (h
->dynindx
== -1
3738 || info
->executable
)
3740 /* This symbol is resolved locally. */
3741 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3742 outrel
.r_addend
= (h
->root
.u
.def
.value
3743 + h
->root
.u
.def
.section
->output_section
->vma
3744 + h
->root
.u
.def
.section
->output_offset
);
3748 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3749 outrel
.r_addend
= 0;
3752 sreloc
= htab
->elf
.irelifunc
;
3753 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3755 /* If this reloc is against an external symbol, we
3756 do not want to fiddle with the addend. Otherwise,
3757 we need to include the symbol value so that it
3758 becomes an addend for the dynamic reloc. For an
3759 internal symbol, we have updated addend. */
3764 case R_X86_64_PC32_BND
:
3766 case R_X86_64_PLT32
:
3767 case R_X86_64_PLT32_BND
:
3770 case R_X86_64_GOTPCREL
:
3771 case R_X86_64_GOTPCREL64
:
3772 base_got
= htab
->elf
.sgot
;
3773 off
= h
->got
.offset
;
3775 if (base_got
== NULL
)
3778 if (off
== (bfd_vma
) -1)
3780 /* We can't use h->got.offset here to save state, or
3781 even just remember the offset, as finish_dynamic_symbol
3782 would use that as offset into .got. */
3784 if (htab
->elf
.splt
!= NULL
)
3786 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3787 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3788 base_got
= htab
->elf
.sgotplt
;
3792 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3793 off
= plt_index
* GOT_ENTRY_SIZE
;
3794 base_got
= htab
->elf
.igotplt
;
3797 if (h
->dynindx
== -1
3801 /* This references the local defitionion. We must
3802 initialize this entry in the global offset table.
3803 Since the offset must always be a multiple of 8,
3804 we use the least significant bit to record
3805 whether we have initialized it already.
3807 When doing a dynamic link, we create a .rela.got
3808 relocation entry to initialize the value. This
3809 is done in the finish_dynamic_symbol routine. */
3814 bfd_put_64 (output_bfd
, relocation
,
3815 base_got
->contents
+ off
);
3816 /* Note that this is harmless for the GOTPLT64
3817 case, as -1 | 1 still is -1. */
3823 relocation
= (base_got
->output_section
->vma
3824 + base_got
->output_offset
+ off
);
3830 /* When generating a shared object, the relocations handled here are
3831 copied into the output file to be resolved at run time. */
3834 case R_X86_64_GOT32
:
3835 case R_X86_64_GOT64
:
3836 /* Relocation is to the entry for this symbol in the global
3838 case R_X86_64_GOTPCREL
:
3839 case R_X86_64_GOTPCREL64
:
3840 /* Use global offset table entry as symbol value. */
3841 case R_X86_64_GOTPLT64
:
3842 /* This is obsolete and treated the the same as GOT64. */
3843 base_got
= htab
->elf
.sgot
;
3845 if (htab
->elf
.sgot
== NULL
)
3852 off
= h
->got
.offset
;
3854 && h
->plt
.offset
!= (bfd_vma
)-1
3855 && off
== (bfd_vma
)-1)
3857 /* We can't use h->got.offset here to save
3858 state, or even just remember the offset, as
3859 finish_dynamic_symbol would use that as offset into
3861 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3862 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3863 base_got
= htab
->elf
.sgotplt
;
3866 dyn
= htab
->elf
.dynamic_sections_created
;
3868 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3870 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3871 || (ELF_ST_VISIBILITY (h
->other
)
3872 && h
->root
.type
== bfd_link_hash_undefweak
))
3874 /* This is actually a static link, or it is a -Bsymbolic
3875 link and the symbol is defined locally, or the symbol
3876 was forced to be local because of a version file. We
3877 must initialize this entry in the global offset table.
3878 Since the offset must always be a multiple of 8, we
3879 use the least significant bit to record whether we
3880 have initialized it already.
3882 When doing a dynamic link, we create a .rela.got
3883 relocation entry to initialize the value. This is
3884 done in the finish_dynamic_symbol routine. */
3889 bfd_put_64 (output_bfd
, relocation
,
3890 base_got
->contents
+ off
);
3891 /* Note that this is harmless for the GOTPLT64 case,
3892 as -1 | 1 still is -1. */
3897 unresolved_reloc
= FALSE
;
3901 if (local_got_offsets
== NULL
)
3904 off
= local_got_offsets
[r_symndx
];
3906 /* The offset must always be a multiple of 8. We use
3907 the least significant bit to record whether we have
3908 already generated the necessary reloc. */
3913 bfd_put_64 (output_bfd
, relocation
,
3914 base_got
->contents
+ off
);
3919 Elf_Internal_Rela outrel
;
3921 /* We need to generate a R_X86_64_RELATIVE reloc
3922 for the dynamic linker. */
3923 s
= htab
->elf
.srelgot
;
3927 outrel
.r_offset
= (base_got
->output_section
->vma
3928 + base_got
->output_offset
3930 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3931 outrel
.r_addend
= relocation
;
3932 elf_append_rela (output_bfd
, s
, &outrel
);
3935 local_got_offsets
[r_symndx
] |= 1;
3939 if (off
>= (bfd_vma
) -2)
3942 relocation
= base_got
->output_section
->vma
3943 + base_got
->output_offset
+ off
;
3944 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
3945 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3946 - htab
->elf
.sgotplt
->output_offset
;
3950 case R_X86_64_GOTOFF64
:
3951 /* Relocation is relative to the start of the global offset
3954 /* Check to make sure it isn't a protected function or data
3955 symbol for shared library since it may not be local when
3956 used as function address or with copy relocation. We also
3957 need to make sure that a symbol is referenced locally. */
3958 if (info
->shared
&& h
)
3960 if (!h
->def_regular
)
3964 switch (ELF_ST_VISIBILITY (h
->other
))
3967 v
= _("hidden symbol");
3970 v
= _("internal symbol");
3973 v
= _("protected symbol");
3980 (*_bfd_error_handler
)
3981 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
3982 input_bfd
, v
, h
->root
.root
.string
);
3983 bfd_set_error (bfd_error_bad_value
);
3986 else if (!info
->executable
3987 && !SYMBOL_REFERENCES_LOCAL (info
, h
)
3988 && (h
->type
== STT_FUNC
3989 || h
->type
== STT_OBJECT
)
3990 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3992 (*_bfd_error_handler
)
3993 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
3995 h
->type
== STT_FUNC
? "function" : "data",
3996 h
->root
.root
.string
);
3997 bfd_set_error (bfd_error_bad_value
);
4002 /* Note that sgot is not involved in this
4003 calculation. We always want the start of .got.plt. If we
4004 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4005 permitted by the ABI, we might have to change this
4007 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4008 + htab
->elf
.sgotplt
->output_offset
;
4011 case R_X86_64_GOTPC32
:
4012 case R_X86_64_GOTPC64
:
4013 /* Use global offset table as symbol value. */
4014 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4015 + htab
->elf
.sgotplt
->output_offset
;
4016 unresolved_reloc
= FALSE
;
4019 case R_X86_64_PLTOFF64
:
4020 /* Relocation is PLT entry relative to GOT. For local
4021 symbols it's the symbol itself relative to GOT. */
4023 /* See PLT32 handling. */
4024 && h
->plt
.offset
!= (bfd_vma
) -1
4025 && htab
->elf
.splt
!= NULL
)
4027 if (htab
->plt_bnd
!= NULL
)
4029 resolved_plt
= htab
->plt_bnd
;
4030 plt_offset
= eh
->plt_bnd
.offset
;
4034 resolved_plt
= htab
->elf
.splt
;
4035 plt_offset
= h
->plt
.offset
;
4038 relocation
= (resolved_plt
->output_section
->vma
4039 + resolved_plt
->output_offset
4041 unresolved_reloc
= FALSE
;
4044 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4045 + htab
->elf
.sgotplt
->output_offset
;
4048 case R_X86_64_PLT32
:
4049 case R_X86_64_PLT32_BND
:
4050 /* Relocation is to the entry for this symbol in the
4051 procedure linkage table. */
4053 /* Resolve a PLT32 reloc against a local symbol directly,
4054 without using the procedure linkage table. */
4058 if ((h
->plt
.offset
== (bfd_vma
) -1
4059 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4060 || htab
->elf
.splt
== NULL
)
4062 /* We didn't make a PLT entry for this symbol. This
4063 happens when statically linking PIC code, or when
4064 using -Bsymbolic. */
4068 if (h
->plt
.offset
!= (bfd_vma
) -1)
4070 if (htab
->plt_bnd
!= NULL
)
4072 resolved_plt
= htab
->plt_bnd
;
4073 plt_offset
= eh
->plt_bnd
.offset
;
4077 resolved_plt
= htab
->elf
.splt
;
4078 plt_offset
= h
->plt
.offset
;
4083 /* Use the GOT PLT. */
4084 resolved_plt
= htab
->plt_got
;
4085 plt_offset
= eh
->plt_got
.offset
;
4088 relocation
= (resolved_plt
->output_section
->vma
4089 + resolved_plt
->output_offset
4091 unresolved_reloc
= FALSE
;
4094 case R_X86_64_SIZE32
:
4095 case R_X86_64_SIZE64
:
4096 /* Set to symbol size. */
4097 relocation
= st_size
;
4103 case R_X86_64_PC32_BND
:
4104 /* Don't complain about -fPIC if the symbol is undefined when
4105 building executable. */
4107 && (input_section
->flags
& SEC_ALLOC
) != 0
4108 && (input_section
->flags
& SEC_READONLY
) != 0
4110 && !(info
->executable
4111 && h
->root
.type
== bfd_link_hash_undefined
))
4113 bfd_boolean fail
= FALSE
;
4115 = ((r_type
== R_X86_64_PC32
4116 || r_type
== R_X86_64_PC32_BND
)
4117 && is_32bit_relative_branch (contents
, rel
->r_offset
));
4119 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
4121 /* Symbol is referenced locally. Make sure it is
4122 defined locally or for a branch. */
4123 fail
= !h
->def_regular
&& !branch
;
4125 else if (!(info
->executable
4126 && (h
->needs_copy
|| eh
->needs_copy
)))
4128 /* Symbol doesn't need copy reloc and isn't referenced
4129 locally. We only allow branch to symbol with
4130 non-default visibility. */
4132 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
4139 const char *pic
= "";
4141 switch (ELF_ST_VISIBILITY (h
->other
))
4144 v
= _("hidden symbol");
4147 v
= _("internal symbol");
4150 v
= _("protected symbol");
4154 pic
= _("; recompile with -fPIC");
4159 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4161 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4163 (*_bfd_error_handler
) (fmt
, input_bfd
,
4164 x86_64_elf_howto_table
[r_type
].name
,
4165 v
, h
->root
.root
.string
, pic
);
4166 bfd_set_error (bfd_error_bad_value
);
4177 /* FIXME: The ABI says the linker should make sure the value is
4178 the same when it's zeroextended to 64 bit. */
4181 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4184 /* Don't copy a pc-relative relocation into the output file
4185 if the symbol needs copy reloc or the symbol is undefined
4186 when building executable. */
4188 && !(info
->executable
4192 || h
->root
.type
== bfd_link_hash_undefined
)
4193 && IS_X86_64_PCREL_TYPE (r_type
))
4195 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4196 || h
->root
.type
!= bfd_link_hash_undefweak
)
4197 && ((! IS_X86_64_PCREL_TYPE (r_type
)
4198 && r_type
!= R_X86_64_SIZE32
4199 && r_type
!= R_X86_64_SIZE64
)
4200 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
4201 || (ELIMINATE_COPY_RELOCS
4208 || h
->root
.type
== bfd_link_hash_undefweak
4209 || h
->root
.type
== bfd_link_hash_undefined
)))
4211 Elf_Internal_Rela outrel
;
4212 bfd_boolean skip
, relocate
;
4215 /* When generating a shared object, these relocations
4216 are copied into the output file to be resolved at run
4222 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4224 if (outrel
.r_offset
== (bfd_vma
) -1)
4226 else if (outrel
.r_offset
== (bfd_vma
) -2)
4227 skip
= TRUE
, relocate
= TRUE
;
4229 outrel
.r_offset
+= (input_section
->output_section
->vma
4230 + input_section
->output_offset
);
4233 memset (&outrel
, 0, sizeof outrel
);
4235 /* h->dynindx may be -1 if this symbol was marked to
4239 && (IS_X86_64_PCREL_TYPE (r_type
)
4241 || ! SYMBOLIC_BIND (info
, h
)
4242 || ! h
->def_regular
))
4244 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
4245 outrel
.r_addend
= rel
->r_addend
;
4249 /* This symbol is local, or marked to become local. */
4250 if (r_type
== htab
->pointer_r_type
)
4253 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4254 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4256 else if (r_type
== R_X86_64_64
4257 && !ABI_64_P (output_bfd
))
4260 outrel
.r_info
= htab
->r_info (0,
4261 R_X86_64_RELATIVE64
);
4262 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4263 /* Check addend overflow. */
4264 if ((outrel
.r_addend
& 0x80000000)
4265 != (rel
->r_addend
& 0x80000000))
4268 int addend
= rel
->r_addend
;
4269 if (h
&& h
->root
.root
.string
)
4270 name
= h
->root
.root
.string
;
4272 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4275 (*_bfd_error_handler
)
4276 (_("%B: addend -0x%x in relocation %s against "
4277 "symbol `%s' at 0x%lx in section `%A' is "
4279 input_bfd
, input_section
, addend
,
4280 x86_64_elf_howto_table
[r_type
].name
,
4281 name
, (unsigned long) rel
->r_offset
);
4283 (*_bfd_error_handler
)
4284 (_("%B: addend 0x%x in relocation %s against "
4285 "symbol `%s' at 0x%lx in section `%A' is "
4287 input_bfd
, input_section
, addend
,
4288 x86_64_elf_howto_table
[r_type
].name
,
4289 name
, (unsigned long) rel
->r_offset
);
4290 bfd_set_error (bfd_error_bad_value
);
4298 if (bfd_is_abs_section (sec
))
4300 else if (sec
== NULL
|| sec
->owner
== NULL
)
4302 bfd_set_error (bfd_error_bad_value
);
4309 /* We are turning this relocation into one
4310 against a section symbol. It would be
4311 proper to subtract the symbol's value,
4312 osec->vma, from the emitted reloc addend,
4313 but ld.so expects buggy relocs. */
4314 osec
= sec
->output_section
;
4315 sindx
= elf_section_data (osec
)->dynindx
;
4318 asection
*oi
= htab
->elf
.text_index_section
;
4319 sindx
= elf_section_data (oi
)->dynindx
;
4321 BFD_ASSERT (sindx
!= 0);
4324 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
4325 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4329 sreloc
= elf_section_data (input_section
)->sreloc
;
4331 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4333 r
= bfd_reloc_notsupported
;
4334 goto check_relocation_error
;
4337 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4339 /* If this reloc is against an external symbol, we do
4340 not want to fiddle with the addend. Otherwise, we
4341 need to include the symbol value so that it becomes
4342 an addend for the dynamic reloc. */
4349 case R_X86_64_TLSGD
:
4350 case R_X86_64_GOTPC32_TLSDESC
:
4351 case R_X86_64_TLSDESC_CALL
:
4352 case R_X86_64_GOTTPOFF
:
4353 tls_type
= GOT_UNKNOWN
;
4354 if (h
== NULL
&& local_got_offsets
)
4355 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
4357 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
4359 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4360 input_section
, contents
,
4361 symtab_hdr
, sym_hashes
,
4362 &r_type
, tls_type
, rel
,
4363 relend
, h
, r_symndx
))
4366 if (r_type
== R_X86_64_TPOFF32
)
4368 bfd_vma roff
= rel
->r_offset
;
4370 BFD_ASSERT (! unresolved_reloc
);
4372 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4374 /* GD->LE transition. For 64bit, change
4375 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4376 .word 0x6666; rex64; call __tls_get_addr
4379 leaq foo@tpoff(%rax), %rax
4381 leaq foo@tlsgd(%rip), %rdi
4382 .word 0x6666; rex64; call __tls_get_addr
4385 leaq foo@tpoff(%rax), %rax
4386 For largepic, change:
4387 leaq foo@tlsgd(%rip), %rdi
4388 movabsq $__tls_get_addr@pltoff, %rax
4393 leaq foo@tpoff(%rax), %rax
4394 nopw 0x0(%rax,%rax,1) */
4396 if (ABI_64_P (output_bfd
)
4397 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4399 memcpy (contents
+ roff
- 3,
4400 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4401 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4404 else if (ABI_64_P (output_bfd
))
4405 memcpy (contents
+ roff
- 4,
4406 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4409 memcpy (contents
+ roff
- 3,
4410 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4412 bfd_put_32 (output_bfd
,
4413 elf_x86_64_tpoff (info
, relocation
),
4414 contents
+ roff
+ 8 + largepic
);
4415 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4419 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4421 /* GDesc -> LE transition.
4422 It's originally something like:
4423 leaq x@tlsdesc(%rip), %rax
4426 movl $x@tpoff, %rax. */
4428 unsigned int val
, type
;
4430 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4431 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4432 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4433 contents
+ roff
- 3);
4434 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4435 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4436 contents
+ roff
- 1);
4437 bfd_put_32 (output_bfd
,
4438 elf_x86_64_tpoff (info
, relocation
),
4442 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4444 /* GDesc -> LE transition.
4449 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4450 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4453 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4455 /* IE->LE transition:
4456 For 64bit, originally it can be one of:
4457 movq foo@gottpoff(%rip), %reg
4458 addq foo@gottpoff(%rip), %reg
4461 leaq foo(%reg), %reg
4463 For 32bit, originally it can be one of:
4464 movq foo@gottpoff(%rip), %reg
4465 addl foo@gottpoff(%rip), %reg
4468 leal foo(%reg), %reg
4471 unsigned int val
, type
, reg
;
4474 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4477 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4478 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4484 bfd_put_8 (output_bfd
, 0x49,
4485 contents
+ roff
- 3);
4486 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4487 bfd_put_8 (output_bfd
, 0x41,
4488 contents
+ roff
- 3);
4489 bfd_put_8 (output_bfd
, 0xc7,
4490 contents
+ roff
- 2);
4491 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4492 contents
+ roff
- 1);
4496 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4499 bfd_put_8 (output_bfd
, 0x49,
4500 contents
+ roff
- 3);
4501 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4502 bfd_put_8 (output_bfd
, 0x41,
4503 contents
+ roff
- 3);
4504 bfd_put_8 (output_bfd
, 0x81,
4505 contents
+ roff
- 2);
4506 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4507 contents
+ roff
- 1);
4511 /* addq/addl -> leaq/leal */
4513 bfd_put_8 (output_bfd
, 0x4d,
4514 contents
+ roff
- 3);
4515 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4516 bfd_put_8 (output_bfd
, 0x45,
4517 contents
+ roff
- 3);
4518 bfd_put_8 (output_bfd
, 0x8d,
4519 contents
+ roff
- 2);
4520 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4521 contents
+ roff
- 1);
4523 bfd_put_32 (output_bfd
,
4524 elf_x86_64_tpoff (info
, relocation
),
4532 if (htab
->elf
.sgot
== NULL
)
4537 off
= h
->got
.offset
;
4538 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4542 if (local_got_offsets
== NULL
)
4545 off
= local_got_offsets
[r_symndx
];
4546 offplt
= local_tlsdesc_gotents
[r_symndx
];
4553 Elf_Internal_Rela outrel
;
4557 if (htab
->elf
.srelgot
== NULL
)
4560 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4562 if (GOT_TLS_GDESC_P (tls_type
))
4564 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4565 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4566 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4567 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4568 + htab
->elf
.sgotplt
->output_offset
4570 + htab
->sgotplt_jump_table_size
);
4571 sreloc
= htab
->elf
.srelplt
;
4573 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4575 outrel
.r_addend
= 0;
4576 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4579 sreloc
= htab
->elf
.srelgot
;
4581 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4582 + htab
->elf
.sgot
->output_offset
+ off
);
4584 if (GOT_TLS_GD_P (tls_type
))
4585 dr_type
= R_X86_64_DTPMOD64
;
4586 else if (GOT_TLS_GDESC_P (tls_type
))
4589 dr_type
= R_X86_64_TPOFF64
;
4591 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4592 outrel
.r_addend
= 0;
4593 if ((dr_type
== R_X86_64_TPOFF64
4594 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4595 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4596 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4598 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4600 if (GOT_TLS_GD_P (tls_type
))
4604 BFD_ASSERT (! unresolved_reloc
);
4605 bfd_put_64 (output_bfd
,
4606 relocation
- elf_x86_64_dtpoff_base (info
),
4607 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4611 bfd_put_64 (output_bfd
, 0,
4612 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4613 outrel
.r_info
= htab
->r_info (indx
,
4615 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4616 elf_append_rela (output_bfd
, sreloc
,
4625 local_got_offsets
[r_symndx
] |= 1;
4628 if (off
>= (bfd_vma
) -2
4629 && ! GOT_TLS_GDESC_P (tls_type
))
4631 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4633 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4634 || r_type
== R_X86_64_TLSDESC_CALL
)
4635 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4636 + htab
->elf
.sgotplt
->output_offset
4637 + offplt
+ htab
->sgotplt_jump_table_size
;
4639 relocation
= htab
->elf
.sgot
->output_section
->vma
4640 + htab
->elf
.sgot
->output_offset
+ off
;
4641 unresolved_reloc
= FALSE
;
4645 bfd_vma roff
= rel
->r_offset
;
4647 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4649 /* GD->IE transition. For 64bit, change
4650 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4651 .word 0x6666; rex64; call __tls_get_addr@plt
4654 addq foo@gottpoff(%rip), %rax
4656 leaq foo@tlsgd(%rip), %rdi
4657 .word 0x6666; rex64; call __tls_get_addr@plt
4660 addq foo@gottpoff(%rip), %rax
4661 For largepic, change:
4662 leaq foo@tlsgd(%rip), %rdi
4663 movabsq $__tls_get_addr@pltoff, %rax
4668 addq foo@gottpoff(%rax), %rax
4669 nopw 0x0(%rax,%rax,1) */
4671 if (ABI_64_P (output_bfd
)
4672 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4674 memcpy (contents
+ roff
- 3,
4675 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4676 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4679 else if (ABI_64_P (output_bfd
))
4680 memcpy (contents
+ roff
- 4,
4681 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4684 memcpy (contents
+ roff
- 3,
4685 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4688 relocation
= (htab
->elf
.sgot
->output_section
->vma
4689 + htab
->elf
.sgot
->output_offset
+ off
4692 - input_section
->output_section
->vma
4693 - input_section
->output_offset
4695 bfd_put_32 (output_bfd
, relocation
,
4696 contents
+ roff
+ 8 + largepic
);
4697 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4701 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4703 /* GDesc -> IE transition.
4704 It's originally something like:
4705 leaq x@tlsdesc(%rip), %rax
4708 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4710 /* Now modify the instruction as appropriate. To
4711 turn a leaq into a movq in the form we use it, it
4712 suffices to change the second byte from 0x8d to
4714 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4716 bfd_put_32 (output_bfd
,
4717 htab
->elf
.sgot
->output_section
->vma
4718 + htab
->elf
.sgot
->output_offset
+ off
4720 - input_section
->output_section
->vma
4721 - input_section
->output_offset
4726 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4728 /* GDesc -> IE transition.
4735 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4736 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4744 case R_X86_64_TLSLD
:
4745 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4746 input_section
, contents
,
4747 symtab_hdr
, sym_hashes
,
4748 &r_type
, GOT_UNKNOWN
,
4749 rel
, relend
, h
, r_symndx
))
4752 if (r_type
!= R_X86_64_TLSLD
)
4754 /* LD->LE transition:
4755 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4756 For 64bit, we change it into:
4757 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4758 For 32bit, we change it into:
4759 nopl 0x0(%rax); movl %fs:0, %eax.
4760 For largepic, change:
4761 leaq foo@tlsgd(%rip), %rdi
4762 movabsq $__tls_get_addr@pltoff, %rax
4766 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4769 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4770 if (ABI_64_P (output_bfd
)
4771 && contents
[rel
->r_offset
+ 5] == (bfd_byte
) '\xb8')
4772 memcpy (contents
+ rel
->r_offset
- 3,
4773 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4774 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4775 else if (ABI_64_P (output_bfd
))
4776 memcpy (contents
+ rel
->r_offset
- 3,
4777 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4779 memcpy (contents
+ rel
->r_offset
- 3,
4780 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4781 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4786 if (htab
->elf
.sgot
== NULL
)
4789 off
= htab
->tls_ld_got
.offset
;
4794 Elf_Internal_Rela outrel
;
4796 if (htab
->elf
.srelgot
== NULL
)
4799 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4800 + htab
->elf
.sgot
->output_offset
+ off
);
4802 bfd_put_64 (output_bfd
, 0,
4803 htab
->elf
.sgot
->contents
+ off
);
4804 bfd_put_64 (output_bfd
, 0,
4805 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4806 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4807 outrel
.r_addend
= 0;
4808 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4810 htab
->tls_ld_got
.offset
|= 1;
4812 relocation
= htab
->elf
.sgot
->output_section
->vma
4813 + htab
->elf
.sgot
->output_offset
+ off
;
4814 unresolved_reloc
= FALSE
;
4817 case R_X86_64_DTPOFF32
:
4818 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4819 relocation
-= elf_x86_64_dtpoff_base (info
);
4821 relocation
= elf_x86_64_tpoff (info
, relocation
);
4824 case R_X86_64_TPOFF32
:
4825 case R_X86_64_TPOFF64
:
4826 BFD_ASSERT (info
->executable
);
4827 relocation
= elf_x86_64_tpoff (info
, relocation
);
4830 case R_X86_64_DTPOFF64
:
4831 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4832 relocation
-= elf_x86_64_dtpoff_base (info
);
4839 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4840 because such sections are not SEC_ALLOC and thus ld.so will
4841 not process them. */
4842 if (unresolved_reloc
4843 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4845 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4846 rel
->r_offset
) != (bfd_vma
) -1)
4848 (*_bfd_error_handler
)
4849 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4852 (long) rel
->r_offset
,
4854 h
->root
.root
.string
);
4859 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4860 contents
, rel
->r_offset
,
4861 relocation
, rel
->r_addend
);
4863 check_relocation_error
:
4864 if (r
!= bfd_reloc_ok
)
4869 name
= h
->root
.root
.string
;
4872 name
= bfd_elf_string_from_elf_section (input_bfd
,
4873 symtab_hdr
->sh_link
,
4878 name
= bfd_section_name (input_bfd
, sec
);
4881 if (r
== bfd_reloc_overflow
)
4883 if (! ((*info
->callbacks
->reloc_overflow
)
4884 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4885 (bfd_vma
) 0, input_bfd
, input_section
,
4891 (*_bfd_error_handler
)
4892 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4893 input_bfd
, input_section
,
4894 (long) rel
->r_offset
, name
, (int) r
);
4903 /* Finish up dynamic symbol handling. We set the contents of various
4904 dynamic sections here. */
4907 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4908 struct bfd_link_info
*info
,
4909 struct elf_link_hash_entry
*h
,
4910 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4912 struct elf_x86_64_link_hash_table
*htab
;
4913 const struct elf_x86_64_backend_data
*abed
;
4914 bfd_boolean use_plt_bnd
;
4915 struct elf_x86_64_link_hash_entry
*eh
;
4917 htab
= elf_x86_64_hash_table (info
);
4921 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
4922 section only if there is .plt section. */
4923 use_plt_bnd
= htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
;
4925 ? &elf_x86_64_bnd_arch_bed
4926 : get_elf_x86_64_backend_data (output_bfd
));
4928 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
4930 if (h
->plt
.offset
!= (bfd_vma
) -1)
4933 bfd_vma got_offset
, plt_offset
, plt_plt_offset
, plt_got_offset
;
4934 bfd_vma plt_plt_insn_end
, plt_got_insn_size
;
4935 Elf_Internal_Rela rela
;
4937 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
4938 const struct elf_backend_data
*bed
;
4939 bfd_vma plt_got_pcrel_offset
;
4941 /* When building a static executable, use .iplt, .igot.plt and
4942 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4943 if (htab
->elf
.splt
!= NULL
)
4945 plt
= htab
->elf
.splt
;
4946 gotplt
= htab
->elf
.sgotplt
;
4947 relplt
= htab
->elf
.srelplt
;
4951 plt
= htab
->elf
.iplt
;
4952 gotplt
= htab
->elf
.igotplt
;
4953 relplt
= htab
->elf
.irelplt
;
4956 /* This symbol has an entry in the procedure linkage table. Set
4958 if ((h
->dynindx
== -1
4959 && !((h
->forced_local
|| info
->executable
)
4961 && h
->type
== STT_GNU_IFUNC
))
4967 /* Get the index in the procedure linkage table which
4968 corresponds to this symbol. This is the index of this symbol
4969 in all the symbols for which we are making plt entries. The
4970 first entry in the procedure linkage table is reserved.
4972 Get the offset into the .got table of the entry that
4973 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4974 bytes. The first three are reserved for the dynamic linker.
4976 For static executables, we don't reserve anything. */
4978 if (plt
== htab
->elf
.splt
)
4980 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
4981 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4985 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
4986 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4989 plt_plt_insn_end
= abed
->plt_plt_insn_end
;
4990 plt_plt_offset
= abed
->plt_plt_offset
;
4991 plt_got_insn_size
= abed
->plt_got_insn_size
;
4992 plt_got_offset
= abed
->plt_got_offset
;
4995 /* Use the second PLT with BND relocations. */
4996 const bfd_byte
*plt_entry
, *plt2_entry
;
4998 if (eh
->has_bnd_reloc
)
5000 plt_entry
= elf_x86_64_bnd_plt_entry
;
5001 plt2_entry
= elf_x86_64_bnd_plt2_entry
;
5005 plt_entry
= elf_x86_64_legacy_plt_entry
;
5006 plt2_entry
= elf_x86_64_legacy_plt2_entry
;
5008 /* Subtract 1 since there is no BND prefix. */
5009 plt_plt_insn_end
-= 1;
5010 plt_plt_offset
-= 1;
5011 plt_got_insn_size
-= 1;
5012 plt_got_offset
-= 1;
5015 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry
)
5016 == sizeof (elf_x86_64_legacy_plt_entry
));
5018 /* Fill in the entry in the procedure linkage table. */
5019 memcpy (plt
->contents
+ h
->plt
.offset
,
5020 plt_entry
, sizeof (elf_x86_64_legacy_plt_entry
));
5021 /* Fill in the entry in the second PLT. */
5022 memcpy (htab
->plt_bnd
->contents
+ eh
->plt_bnd
.offset
,
5023 plt2_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5025 resolved_plt
= htab
->plt_bnd
;
5026 plt_offset
= eh
->plt_bnd
.offset
;
5030 /* Fill in the entry in the procedure linkage table. */
5031 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
5032 abed
->plt_entry_size
);
5035 plt_offset
= h
->plt
.offset
;
5038 /* Insert the relocation positions of the plt section. */
5040 /* Put offset the PC-relative instruction referring to the GOT entry,
5041 subtracting the size of that instruction. */
5042 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
5043 + gotplt
->output_offset
5045 - resolved_plt
->output_section
->vma
5046 - resolved_plt
->output_offset
5048 - plt_got_insn_size
);
5050 /* Check PC-relative offset overflow in PLT entry. */
5051 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
5052 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5053 output_bfd
, h
->root
.root
.string
);
5055 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
5056 resolved_plt
->contents
+ plt_offset
+ plt_got_offset
);
5058 /* Fill in the entry in the global offset table, initially this
5059 points to the second part of the PLT entry. */
5060 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5061 + plt
->output_offset
5062 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
5063 gotplt
->contents
+ got_offset
);
5065 /* Fill in the entry in the .rela.plt section. */
5066 rela
.r_offset
= (gotplt
->output_section
->vma
5067 + gotplt
->output_offset
5069 if (h
->dynindx
== -1
5070 || ((info
->executable
5071 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5073 && h
->type
== STT_GNU_IFUNC
))
5075 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5076 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5077 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
5078 rela
.r_addend
= (h
->root
.u
.def
.value
5079 + h
->root
.u
.def
.section
->output_section
->vma
5080 + h
->root
.u
.def
.section
->output_offset
);
5081 /* R_X86_64_IRELATIVE comes last. */
5082 plt_index
= htab
->next_irelative_index
--;
5086 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
5088 plt_index
= htab
->next_jump_slot_index
++;
5091 /* Don't fill PLT entry for static executables. */
5092 if (plt
== htab
->elf
.splt
)
5094 bfd_vma plt0_offset
= h
->plt
.offset
+ plt_plt_insn_end
;
5096 /* Put relocation index. */
5097 bfd_put_32 (output_bfd
, plt_index
,
5098 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
5100 /* Put offset for jmp .PLT0 and check for overflow. We don't
5101 check relocation index for overflow since branch displacement
5102 will overflow first. */
5103 if (plt0_offset
> 0x80000000)
5104 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5105 output_bfd
, h
->root
.root
.string
);
5106 bfd_put_32 (output_bfd
, - plt0_offset
,
5107 plt
->contents
+ h
->plt
.offset
+ plt_plt_offset
);
5110 bed
= get_elf_backend_data (output_bfd
);
5111 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
5112 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
5114 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5116 bfd_vma got_offset
, plt_offset
, plt_got_offset
, plt_got_insn_size
;
5117 asection
*plt
, *got
;
5118 bfd_boolean got_after_plt
;
5119 int32_t got_pcrel_offset
;
5120 const bfd_byte
*got_plt_entry
;
5122 /* Set the entry in the GOT procedure linkage table. */
5123 plt
= htab
->plt_got
;
5124 got
= htab
->elf
.sgot
;
5125 got_offset
= h
->got
.offset
;
5127 if (got_offset
== (bfd_vma
) -1
5128 || h
->type
== STT_GNU_IFUNC
5133 /* Use the second PLT entry template for the GOT PLT since they
5134 are the identical. */
5135 plt_got_insn_size
= elf_x86_64_bnd_arch_bed
.plt_got_insn_size
;
5136 plt_got_offset
= elf_x86_64_bnd_arch_bed
.plt_got_offset
;
5137 if (eh
->has_bnd_reloc
)
5138 got_plt_entry
= elf_x86_64_bnd_plt2_entry
;
5141 got_plt_entry
= elf_x86_64_legacy_plt2_entry
;
5143 /* Subtract 1 since there is no BND prefix. */
5144 plt_got_insn_size
-= 1;
5145 plt_got_offset
-= 1;
5148 /* Fill in the entry in the GOT procedure linkage table. */
5149 plt_offset
= eh
->plt_got
.offset
;
5150 memcpy (plt
->contents
+ plt_offset
,
5151 got_plt_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5153 /* Put offset the PC-relative instruction referring to the GOT
5154 entry, subtracting the size of that instruction. */
5155 got_pcrel_offset
= (got
->output_section
->vma
5156 + got
->output_offset
5158 - plt
->output_section
->vma
5159 - plt
->output_offset
5161 - plt_got_insn_size
);
5163 /* Check PC-relative offset overflow in GOT PLT entry. */
5164 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
5165 if ((got_after_plt
&& got_pcrel_offset
< 0)
5166 || (!got_after_plt
&& got_pcrel_offset
> 0))
5167 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5168 output_bfd
, h
->root
.root
.string
);
5170 bfd_put_32 (output_bfd
, got_pcrel_offset
,
5171 plt
->contents
+ plt_offset
+ plt_got_offset
);
5175 && (h
->plt
.offset
!= (bfd_vma
) -1
5176 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5178 /* Mark the symbol as undefined, rather than as defined in
5179 the .plt section. Leave the value if there were any
5180 relocations where pointer equality matters (this is a clue
5181 for the dynamic linker, to make function pointer
5182 comparisons work between an application and shared
5183 library), otherwise set it to zero. If a function is only
5184 called from a binary, there is no need to slow down
5185 shared libraries because of that. */
5186 sym
->st_shndx
= SHN_UNDEF
;
5187 if (!h
->pointer_equality_needed
)
5191 if (h
->got
.offset
!= (bfd_vma
) -1
5192 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
5193 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
5195 Elf_Internal_Rela rela
;
5197 /* This symbol has an entry in the global offset table. Set it
5199 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5202 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5203 + htab
->elf
.sgot
->output_offset
5204 + (h
->got
.offset
&~ (bfd_vma
) 1));
5206 /* If this is a static link, or it is a -Bsymbolic link and the
5207 symbol is defined locally or was forced to be local because
5208 of a version file, we just want to emit a RELATIVE reloc.
5209 The entry in the global offset table will already have been
5210 initialized in the relocate_section function. */
5212 && h
->type
== STT_GNU_IFUNC
)
5216 /* Generate R_X86_64_GLOB_DAT. */
5223 if (!h
->pointer_equality_needed
)
5226 /* For non-shared object, we can't use .got.plt, which
5227 contains the real function addres if we need pointer
5228 equality. We load the GOT entry with the PLT entry. */
5229 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5230 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5231 + plt
->output_offset
5233 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5237 else if (info
->shared
5238 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5240 if (!h
->def_regular
)
5242 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5243 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
5244 rela
.r_addend
= (h
->root
.u
.def
.value
5245 + h
->root
.u
.def
.section
->output_section
->vma
5246 + h
->root
.u
.def
.section
->output_offset
);
5250 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5252 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5253 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5254 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
5258 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
5263 Elf_Internal_Rela rela
;
5265 /* This symbol needs a copy reloc. Set it up. */
5267 if (h
->dynindx
== -1
5268 || (h
->root
.type
!= bfd_link_hash_defined
5269 && h
->root
.type
!= bfd_link_hash_defweak
)
5270 || htab
->srelbss
== NULL
)
5273 rela
.r_offset
= (h
->root
.u
.def
.value
5274 + h
->root
.u
.def
.section
->output_section
->vma
5275 + h
->root
.u
.def
.section
->output_offset
);
5276 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
5278 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
5284 /* Finish up local dynamic symbol handling. We set the contents of
5285 various dynamic sections here. */
5288 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
5290 struct elf_link_hash_entry
*h
5291 = (struct elf_link_hash_entry
*) *slot
;
5292 struct bfd_link_info
*info
5293 = (struct bfd_link_info
*) inf
;
5295 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
5299 /* Used to decide how to sort relocs in an optimal manner for the
5300 dynamic linker, before writing them out. */
5302 static enum elf_reloc_type_class
5303 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5304 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5305 const Elf_Internal_Rela
*rela
)
5307 switch ((int) ELF32_R_TYPE (rela
->r_info
))
5309 case R_X86_64_RELATIVE
:
5310 case R_X86_64_RELATIVE64
:
5311 return reloc_class_relative
;
5312 case R_X86_64_JUMP_SLOT
:
5313 return reloc_class_plt
;
5315 return reloc_class_copy
;
5317 return reloc_class_normal
;
5321 /* Finish up the dynamic sections. */
5324 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
5325 struct bfd_link_info
*info
)
5327 struct elf_x86_64_link_hash_table
*htab
;
5330 const struct elf_x86_64_backend_data
*abed
;
5332 htab
= elf_x86_64_hash_table (info
);
5336 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5337 section only if there is .plt section. */
5338 abed
= (htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
5339 ? &elf_x86_64_bnd_arch_bed
5340 : get_elf_x86_64_backend_data (output_bfd
));
5342 dynobj
= htab
->elf
.dynobj
;
5343 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5345 if (htab
->elf
.dynamic_sections_created
)
5347 bfd_byte
*dyncon
, *dynconend
;
5348 const struct elf_backend_data
*bed
;
5349 bfd_size_type sizeof_dyn
;
5351 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5354 bed
= get_elf_backend_data (dynobj
);
5355 sizeof_dyn
= bed
->s
->sizeof_dyn
;
5356 dyncon
= sdyn
->contents
;
5357 dynconend
= sdyn
->contents
+ sdyn
->size
;
5358 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
5360 Elf_Internal_Dyn dyn
;
5363 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
5371 s
= htab
->elf
.sgotplt
;
5372 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5376 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
5380 s
= htab
->elf
.srelplt
->output_section
;
5381 dyn
.d_un
.d_val
= s
->size
;
5385 /* The procedure linkage table relocs (DT_JMPREL) should
5386 not be included in the overall relocs (DT_RELA).
5387 Therefore, we override the DT_RELASZ entry here to
5388 make it not include the JMPREL relocs. Since the
5389 linker script arranges for .rela.plt to follow all
5390 other relocation sections, we don't have to worry
5391 about changing the DT_RELA entry. */
5392 if (htab
->elf
.srelplt
!= NULL
)
5394 s
= htab
->elf
.srelplt
->output_section
;
5395 dyn
.d_un
.d_val
-= s
->size
;
5399 case DT_TLSDESC_PLT
:
5401 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5402 + htab
->tlsdesc_plt
;
5405 case DT_TLSDESC_GOT
:
5407 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5408 + htab
->tlsdesc_got
;
5412 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
5415 /* Fill in the special first entry in the procedure linkage table. */
5416 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5418 /* Fill in the first entry in the procedure linkage table. */
5419 memcpy (htab
->elf
.splt
->contents
,
5420 abed
->plt0_entry
, abed
->plt_entry_size
);
5421 /* Add offset for pushq GOT+8(%rip), since the instruction
5422 uses 6 bytes subtract this value. */
5423 bfd_put_32 (output_bfd
,
5424 (htab
->elf
.sgotplt
->output_section
->vma
5425 + htab
->elf
.sgotplt
->output_offset
5427 - htab
->elf
.splt
->output_section
->vma
5428 - htab
->elf
.splt
->output_offset
5430 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
5431 /* Add offset for the PC-relative instruction accessing GOT+16,
5432 subtracting the offset to the end of that instruction. */
5433 bfd_put_32 (output_bfd
,
5434 (htab
->elf
.sgotplt
->output_section
->vma
5435 + htab
->elf
.sgotplt
->output_offset
5437 - htab
->elf
.splt
->output_section
->vma
5438 - htab
->elf
.splt
->output_offset
5439 - abed
->plt0_got2_insn_end
),
5440 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
5442 elf_section_data (htab
->elf
.splt
->output_section
)
5443 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
5445 if (htab
->tlsdesc_plt
)
5447 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5448 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
5450 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
5451 abed
->plt0_entry
, abed
->plt_entry_size
);
5453 /* Add offset for pushq GOT+8(%rip), since the
5454 instruction uses 6 bytes subtract this value. */
5455 bfd_put_32 (output_bfd
,
5456 (htab
->elf
.sgotplt
->output_section
->vma
5457 + htab
->elf
.sgotplt
->output_offset
5459 - htab
->elf
.splt
->output_section
->vma
5460 - htab
->elf
.splt
->output_offset
5463 htab
->elf
.splt
->contents
5464 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
5465 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5466 where TGD stands for htab->tlsdesc_got, subtracting the offset
5467 to the end of that instruction. */
5468 bfd_put_32 (output_bfd
,
5469 (htab
->elf
.sgot
->output_section
->vma
5470 + htab
->elf
.sgot
->output_offset
5472 - htab
->elf
.splt
->output_section
->vma
5473 - htab
->elf
.splt
->output_offset
5475 - abed
->plt0_got2_insn_end
),
5476 htab
->elf
.splt
->contents
5477 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
5482 if (htab
->plt_bnd
!= NULL
)
5483 elf_section_data (htab
->plt_bnd
->output_section
)
5484 ->this_hdr
.sh_entsize
= sizeof (elf_x86_64_bnd_plt2_entry
);
5486 if (htab
->elf
.sgotplt
)
5488 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5490 (*_bfd_error_handler
)
5491 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5495 /* Fill in the first three entries in the global offset table. */
5496 if (htab
->elf
.sgotplt
->size
> 0)
5498 /* Set the first entry in the global offset table to the address of
5499 the dynamic section. */
5501 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
5503 bfd_put_64 (output_bfd
,
5504 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5505 htab
->elf
.sgotplt
->contents
);
5506 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5507 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
5508 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
5511 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
5515 /* Adjust .eh_frame for .plt section. */
5516 if (htab
->plt_eh_frame
!= NULL
5517 && htab
->plt_eh_frame
->contents
!= NULL
)
5519 if (htab
->elf
.splt
!= NULL
5520 && htab
->elf
.splt
->size
!= 0
5521 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5522 && htab
->elf
.splt
->output_section
!= NULL
5523 && htab
->plt_eh_frame
->output_section
!= NULL
)
5525 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5526 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5527 + htab
->plt_eh_frame
->output_offset
5528 + PLT_FDE_START_OFFSET
;
5529 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5530 htab
->plt_eh_frame
->contents
5531 + PLT_FDE_START_OFFSET
);
5533 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5535 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5537 htab
->plt_eh_frame
->contents
))
5542 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5543 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
5546 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5547 htab_traverse (htab
->loc_hash_table
,
5548 elf_x86_64_finish_local_dynamic_symbol
,
5554 /* Return an array of PLT entry symbol values. */
5557 elf_x86_64_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5560 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5563 bfd_vma
*plt_sym_val
;
5565 bfd_byte
*plt_contents
;
5566 const struct elf_x86_64_backend_data
*bed
;
5567 Elf_Internal_Shdr
*hdr
;
5570 /* Get the .plt section contents. PLT passed down may point to the
5571 .plt.bnd section. Make sure that PLT always points to the .plt
5573 plt_bnd
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5578 plt
= bfd_get_section_by_name (abfd
, ".plt");
5581 bed
= &elf_x86_64_bnd_arch_bed
;
5584 bed
= get_elf_x86_64_backend_data (abfd
);
5586 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5587 if (plt_contents
== NULL
)
5589 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5590 plt_contents
, 0, plt
->size
))
5593 free (plt_contents
);
5597 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5598 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5601 hdr
= &elf_section_data (relplt
)->this_hdr
;
5602 count
= relplt
->size
/ hdr
->sh_entsize
;
5604 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5605 if (plt_sym_val
== NULL
)
5608 for (i
= 0; i
< count
; i
++)
5609 plt_sym_val
[i
] = -1;
5611 plt_offset
= bed
->plt_entry_size
;
5612 p
= relplt
->relocation
;
5613 for (i
= 0; i
< count
; i
++, p
++)
5617 /* Skip unknown relocation. */
5618 if (p
->howto
== NULL
)
5621 if (p
->howto
->type
!= R_X86_64_JUMP_SLOT
5622 && p
->howto
->type
!= R_X86_64_IRELATIVE
)
5625 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5626 + bed
->plt_reloc_offset
));
5627 if (reloc_index
>= count
)
5631 /* This is the index in .plt section. */
5632 long plt_index
= plt_offset
/ bed
->plt_entry_size
;
5633 /* Store VMA + the offset in .plt.bnd section. */
5634 plt_sym_val
[reloc_index
] =
5636 + (plt_index
- 1) * sizeof (elf_x86_64_legacy_plt2_entry
));
5639 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5640 plt_offset
+= bed
->plt_entry_size
;
5643 free (plt_contents
);
5648 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5652 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
5659 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
5660 as PLT if it exists. */
5661 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5663 plt
= bfd_get_section_by_name (abfd
, ".plt");
5664 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5665 dynsymcount
, dynsyms
, ret
,
5667 elf_x86_64_get_plt_sym_val
);
5670 /* Handle an x86-64 specific section when reading an object file. This
5671 is called when elfcode.h finds a section with an unknown type. */
5674 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
5675 const char *name
, int shindex
)
5677 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
5680 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
5686 /* Hook called by the linker routine which adds symbols from an object
5687 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5691 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5692 struct bfd_link_info
*info
,
5693 Elf_Internal_Sym
*sym
,
5694 const char **namep ATTRIBUTE_UNUSED
,
5695 flagword
*flagsp ATTRIBUTE_UNUSED
,
5701 switch (sym
->st_shndx
)
5703 case SHN_X86_64_LCOMMON
:
5704 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5707 lcomm
= bfd_make_section_with_flags (abfd
,
5711 | SEC_LINKER_CREATED
));
5714 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5717 *valp
= sym
->st_size
;
5721 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5722 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5723 && (abfd
->flags
& DYNAMIC
) == 0
5724 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5725 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5731 /* Given a BFD section, try to locate the corresponding ELF section
5735 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5736 asection
*sec
, int *index_return
)
5738 if (sec
== &_bfd_elf_large_com_section
)
5740 *index_return
= SHN_X86_64_LCOMMON
;
5746 /* Process a symbol. */
5749 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5752 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5754 switch (elfsym
->internal_elf_sym
.st_shndx
)
5756 case SHN_X86_64_LCOMMON
:
5757 asym
->section
= &_bfd_elf_large_com_section
;
5758 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5759 /* Common symbol doesn't set BSF_GLOBAL. */
5760 asym
->flags
&= ~BSF_GLOBAL
;
5766 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5768 return (sym
->st_shndx
== SHN_COMMON
5769 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5773 elf_x86_64_common_section_index (asection
*sec
)
5775 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5778 return SHN_X86_64_LCOMMON
;
5782 elf_x86_64_common_section (asection
*sec
)
5784 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5785 return bfd_com_section_ptr
;
5787 return &_bfd_elf_large_com_section
;
5791 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5792 const Elf_Internal_Sym
*sym
,
5797 const asection
*oldsec
)
5799 /* A normal common symbol and a large common symbol result in a
5800 normal common symbol. We turn the large common symbol into a
5803 && h
->root
.type
== bfd_link_hash_common
5805 && bfd_is_com_section (*psec
)
5808 if (sym
->st_shndx
== SHN_COMMON
5809 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5811 h
->root
.u
.c
.p
->section
5812 = bfd_make_section_old_way (oldbfd
, "COMMON");
5813 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5815 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5816 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5817 *psec
= bfd_com_section_ptr
;
5824 elf_x86_64_additional_program_headers (bfd
*abfd
,
5825 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5830 /* Check to see if we need a large readonly segment. */
5831 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5832 if (s
&& (s
->flags
& SEC_LOAD
))
5835 /* Check to see if we need a large data segment. Since .lbss sections
5836 is placed right after the .bss section, there should be no need for
5837 a large data segment just because of .lbss. */
5838 s
= bfd_get_section_by_name (abfd
, ".ldata");
5839 if (s
&& (s
->flags
& SEC_LOAD
))
5845 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5848 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5850 if (h
->plt
.offset
!= (bfd_vma
) -1
5852 && !h
->pointer_equality_needed
)
5855 return _bfd_elf_hash_symbol (h
);
5858 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5861 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5862 const bfd_target
*output
)
5864 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5865 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5866 && _bfd_elf_relocs_compatible (input
, output
));
5869 static const struct bfd_elf_special_section
5870 elf_x86_64_special_sections
[]=
5872 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5873 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5874 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5875 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5876 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5877 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5878 { NULL
, 0, 0, 0, 0 }
5881 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5882 #define TARGET_LITTLE_NAME "elf64-x86-64"
5883 #define ELF_ARCH bfd_arch_i386
5884 #define ELF_TARGET_ID X86_64_ELF_DATA
5885 #define ELF_MACHINE_CODE EM_X86_64
5886 #define ELF_MAXPAGESIZE 0x200000
5887 #define ELF_MINPAGESIZE 0x1000
5888 #define ELF_COMMONPAGESIZE 0x1000
5890 #define elf_backend_can_gc_sections 1
5891 #define elf_backend_can_refcount 1
5892 #define elf_backend_want_got_plt 1
5893 #define elf_backend_plt_readonly 1
5894 #define elf_backend_want_plt_sym 0
5895 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5896 #define elf_backend_rela_normal 1
5897 #define elf_backend_plt_alignment 4
5898 #define elf_backend_extern_protected_data 1
5900 #define elf_info_to_howto elf_x86_64_info_to_howto
5902 #define bfd_elf64_bfd_link_hash_table_create \
5903 elf_x86_64_link_hash_table_create
5904 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5905 #define bfd_elf64_bfd_reloc_name_lookup \
5906 elf_x86_64_reloc_name_lookup
5908 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5909 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5910 #define elf_backend_check_relocs elf_x86_64_check_relocs
5911 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5912 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5913 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5914 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5915 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5916 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5917 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5918 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5920 #define elf_backend_write_core_note elf_x86_64_write_core_note
5922 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5923 #define elf_backend_relocate_section elf_x86_64_relocate_section
5924 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5925 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5926 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5927 #define elf_backend_object_p elf64_x86_64_elf_object_p
5928 #define bfd_elf64_mkobject elf_x86_64_mkobject
5929 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5931 #define elf_backend_section_from_shdr \
5932 elf_x86_64_section_from_shdr
5934 #define elf_backend_section_from_bfd_section \
5935 elf_x86_64_elf_section_from_bfd_section
5936 #define elf_backend_add_symbol_hook \
5937 elf_x86_64_add_symbol_hook
5938 #define elf_backend_symbol_processing \
5939 elf_x86_64_symbol_processing
5940 #define elf_backend_common_section_index \
5941 elf_x86_64_common_section_index
5942 #define elf_backend_common_section \
5943 elf_x86_64_common_section
5944 #define elf_backend_common_definition \
5945 elf_x86_64_common_definition
5946 #define elf_backend_merge_symbol \
5947 elf_x86_64_merge_symbol
5948 #define elf_backend_special_sections \
5949 elf_x86_64_special_sections
5950 #define elf_backend_additional_program_headers \
5951 elf_x86_64_additional_program_headers
5952 #define elf_backend_hash_symbol \
5953 elf_x86_64_hash_symbol
5955 #include "elf64-target.h"
5957 /* CloudABI support. */
5959 #undef TARGET_LITTLE_SYM
5960 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5961 #undef TARGET_LITTLE_NAME
5962 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5965 #define ELF_OSABI ELFOSABI_CLOUDABI
5968 #define elf64_bed elf64_x86_64_cloudabi_bed
5970 #include "elf64-target.h"
5972 /* FreeBSD support. */
5974 #undef TARGET_LITTLE_SYM
5975 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5976 #undef TARGET_LITTLE_NAME
5977 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5980 #define ELF_OSABI ELFOSABI_FREEBSD
5983 #define elf64_bed elf64_x86_64_fbsd_bed
5985 #include "elf64-target.h"
5987 /* Solaris 2 support. */
5989 #undef TARGET_LITTLE_SYM
5990 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5991 #undef TARGET_LITTLE_NAME
5992 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5994 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5995 objects won't be recognized. */
5999 #define elf64_bed elf64_x86_64_sol2_bed
6001 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6003 #undef elf_backend_static_tls_alignment
6004 #define elf_backend_static_tls_alignment 16
6006 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6008 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6010 #undef elf_backend_want_plt_sym
6011 #define elf_backend_want_plt_sym 1
6013 #include "elf64-target.h"
6015 /* Native Client support. */
6018 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
6020 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6021 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
6025 #undef TARGET_LITTLE_SYM
6026 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6027 #undef TARGET_LITTLE_NAME
6028 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6030 #define elf64_bed elf64_x86_64_nacl_bed
6032 #undef ELF_MAXPAGESIZE
6033 #undef ELF_MINPAGESIZE
6034 #undef ELF_COMMONPAGESIZE
6035 #define ELF_MAXPAGESIZE 0x10000
6036 #define ELF_MINPAGESIZE 0x10000
6037 #define ELF_COMMONPAGESIZE 0x10000
6039 /* Restore defaults. */
6041 #undef elf_backend_static_tls_alignment
6042 #undef elf_backend_want_plt_sym
6043 #define elf_backend_want_plt_sym 0
6045 /* NaCl uses substantially different PLT entries for the same effects. */
6047 #undef elf_backend_plt_alignment
6048 #define elf_backend_plt_alignment 5
6049 #define NACL_PLT_ENTRY_SIZE 64
6050 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6052 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
6054 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6055 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6056 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6057 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6058 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6060 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6061 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6063 /* 32 bytes of nop to pad out to the standard size. */
6064 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6065 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6066 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6067 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6068 0x66, /* excess data32 prefix */
6072 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6074 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6075 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6076 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6077 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6079 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6080 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6081 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6083 /* Lazy GOT entries point here (32-byte aligned). */
6084 0x68, /* pushq immediate */
6085 0, 0, 0, 0, /* replaced with index into relocation table. */
6086 0xe9, /* jmp relative */
6087 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6089 /* 22 bytes of nop to pad out to the standard size. */
6090 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6091 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6092 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6095 /* .eh_frame covering the .plt section. */
6097 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
6099 #if (PLT_CIE_LENGTH != 20 \
6100 || PLT_FDE_LENGTH != 36 \
6101 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6102 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6103 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6105 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6106 0, 0, 0, 0, /* CIE ID */
6107 1, /* CIE version */
6108 'z', 'R', 0, /* Augmentation string */
6109 1, /* Code alignment factor */
6110 0x78, /* Data alignment factor */
6111 16, /* Return address column */
6112 1, /* Augmentation size */
6113 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6114 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6115 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6116 DW_CFA_nop
, DW_CFA_nop
,
6118 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6119 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
6120 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6121 0, 0, 0, 0, /* .plt size goes here */
6122 0, /* Augmentation size */
6123 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
6124 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6125 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
6126 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6127 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6128 13, /* Block length */
6129 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
6130 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
6131 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6132 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
6133 DW_CFA_nop
, DW_CFA_nop
6136 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
6138 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
6139 elf_x86_64_nacl_plt_entry
, /* plt_entry */
6140 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6141 2, /* plt0_got1_offset */
6142 9, /* plt0_got2_offset */
6143 13, /* plt0_got2_insn_end */
6144 3, /* plt_got_offset */
6145 33, /* plt_reloc_offset */
6146 38, /* plt_plt_offset */
6147 7, /* plt_got_insn_size */
6148 42, /* plt_plt_insn_end */
6149 32, /* plt_lazy_offset */
6150 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
6151 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
6154 #undef elf_backend_arch_data
6155 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6157 #undef elf_backend_object_p
6158 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6159 #undef elf_backend_modify_segment_map
6160 #define elf_backend_modify_segment_map nacl_modify_segment_map
6161 #undef elf_backend_modify_program_headers
6162 #define elf_backend_modify_program_headers nacl_modify_program_headers
6163 #undef elf_backend_final_write_processing
6164 #define elf_backend_final_write_processing nacl_final_write_processing
6166 #include "elf64-target.h"
6168 /* Native Client x32 support. */
6171 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
6173 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6174 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
6178 #undef TARGET_LITTLE_SYM
6179 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6180 #undef TARGET_LITTLE_NAME
6181 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6183 #define elf32_bed elf32_x86_64_nacl_bed
6185 #define bfd_elf32_bfd_link_hash_table_create \
6186 elf_x86_64_link_hash_table_create
6187 #define bfd_elf32_bfd_reloc_type_lookup \
6188 elf_x86_64_reloc_type_lookup
6189 #define bfd_elf32_bfd_reloc_name_lookup \
6190 elf_x86_64_reloc_name_lookup
6191 #define bfd_elf32_mkobject \
6193 #define bfd_elf32_get_synthetic_symtab \
6194 elf_x86_64_get_synthetic_symtab
6196 #undef elf_backend_object_p
6197 #define elf_backend_object_p \
6198 elf32_x86_64_nacl_elf_object_p
6200 #undef elf_backend_bfd_from_remote_memory
6201 #define elf_backend_bfd_from_remote_memory \
6202 _bfd_elf32_bfd_from_remote_memory
6204 #undef elf_backend_size_info
6205 #define elf_backend_size_info \
6206 _bfd_elf32_size_info
6208 #include "elf32-target.h"
6210 /* Restore defaults. */
6211 #undef elf_backend_object_p
6212 #define elf_backend_object_p elf64_x86_64_elf_object_p
6213 #undef elf_backend_bfd_from_remote_memory
6214 #undef elf_backend_size_info
6215 #undef elf_backend_modify_segment_map
6216 #undef elf_backend_modify_program_headers
6217 #undef elf_backend_final_write_processing
6219 /* Intel L1OM support. */
6222 elf64_l1om_elf_object_p (bfd
*abfd
)
6224 /* Set the right machine number for an L1OM elf64 file. */
6225 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
6229 #undef TARGET_LITTLE_SYM
6230 #define TARGET_LITTLE_SYM l1om_elf64_vec
6231 #undef TARGET_LITTLE_NAME
6232 #define TARGET_LITTLE_NAME "elf64-l1om"
6234 #define ELF_ARCH bfd_arch_l1om
6236 #undef ELF_MACHINE_CODE
6237 #define ELF_MACHINE_CODE EM_L1OM
6242 #define elf64_bed elf64_l1om_bed
6244 #undef elf_backend_object_p
6245 #define elf_backend_object_p elf64_l1om_elf_object_p
6247 /* Restore defaults. */
6248 #undef ELF_MAXPAGESIZE
6249 #undef ELF_MINPAGESIZE
6250 #undef ELF_COMMONPAGESIZE
6251 #define ELF_MAXPAGESIZE 0x200000
6252 #define ELF_MINPAGESIZE 0x1000
6253 #define ELF_COMMONPAGESIZE 0x1000
6254 #undef elf_backend_plt_alignment
6255 #define elf_backend_plt_alignment 4
6256 #undef elf_backend_arch_data
6257 #define elf_backend_arch_data &elf_x86_64_arch_bed
6259 #include "elf64-target.h"
6261 /* FreeBSD L1OM support. */
6263 #undef TARGET_LITTLE_SYM
6264 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6265 #undef TARGET_LITTLE_NAME
6266 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6269 #define ELF_OSABI ELFOSABI_FREEBSD
6272 #define elf64_bed elf64_l1om_fbsd_bed
6274 #include "elf64-target.h"
6276 /* Intel K1OM support. */
6279 elf64_k1om_elf_object_p (bfd
*abfd
)
6281 /* Set the right machine number for an K1OM elf64 file. */
6282 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
6286 #undef TARGET_LITTLE_SYM
6287 #define TARGET_LITTLE_SYM k1om_elf64_vec
6288 #undef TARGET_LITTLE_NAME
6289 #define TARGET_LITTLE_NAME "elf64-k1om"
6291 #define ELF_ARCH bfd_arch_k1om
6293 #undef ELF_MACHINE_CODE
6294 #define ELF_MACHINE_CODE EM_K1OM
6299 #define elf64_bed elf64_k1om_bed
6301 #undef elf_backend_object_p
6302 #define elf_backend_object_p elf64_k1om_elf_object_p
6304 #undef elf_backend_static_tls_alignment
6306 #undef elf_backend_want_plt_sym
6307 #define elf_backend_want_plt_sym 0
6309 #include "elf64-target.h"
6311 /* FreeBSD K1OM support. */
6313 #undef TARGET_LITTLE_SYM
6314 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6315 #undef TARGET_LITTLE_NAME
6316 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6319 #define ELF_OSABI ELFOSABI_FREEBSD
6322 #define elf64_bed elf64_k1om_fbsd_bed
6324 #include "elf64-target.h"
6326 /* 32bit x86-64 support. */
6328 #undef TARGET_LITTLE_SYM
6329 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6330 #undef TARGET_LITTLE_NAME
6331 #define TARGET_LITTLE_NAME "elf32-x86-64"
6335 #define ELF_ARCH bfd_arch_i386
6337 #undef ELF_MACHINE_CODE
6338 #define ELF_MACHINE_CODE EM_X86_64
6342 #undef elf_backend_object_p
6343 #define elf_backend_object_p \
6344 elf32_x86_64_elf_object_p
6346 #undef elf_backend_bfd_from_remote_memory
6347 #define elf_backend_bfd_from_remote_memory \
6348 _bfd_elf32_bfd_from_remote_memory
6350 #undef elf_backend_size_info
6351 #define elf_backend_size_info \
6352 _bfd_elf32_size_info
6354 #include "elf32-target.h"