1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2014 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, 0, 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 symbol has at least one BND relocation. */
761 bfd_boolean has_bnd_reloc
;
763 /* Information about the GOT PLT entry. Filled when there are both
764 GOT and PLT relocations against the same function. */
765 union gotplt_union plt_got
;
767 /* Information about the second PLT entry. Filled when has_bnd_reloc is
769 union gotplt_union plt_bnd
;
771 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
772 starting at the end of the jump table. */
776 #define elf_x86_64_hash_entry(ent) \
777 ((struct elf_x86_64_link_hash_entry *)(ent))
779 struct elf_x86_64_obj_tdata
781 struct elf_obj_tdata root
;
783 /* tls_type for each local got entry. */
784 char *local_got_tls_type
;
786 /* GOTPLT entries for TLS descriptors. */
787 bfd_vma
*local_tlsdesc_gotent
;
790 #define elf_x86_64_tdata(abfd) \
791 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
793 #define elf_x86_64_local_got_tls_type(abfd) \
794 (elf_x86_64_tdata (abfd)->local_got_tls_type)
796 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
797 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
799 #define is_x86_64_elf(bfd) \
800 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
801 && elf_tdata (bfd) != NULL \
802 && elf_object_id (bfd) == X86_64_ELF_DATA)
805 elf_x86_64_mkobject (bfd
*abfd
)
807 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_x86_64_obj_tdata
),
811 /* x86-64 ELF linker hash table. */
813 struct elf_x86_64_link_hash_table
815 struct elf_link_hash_table elf
;
817 /* Short-cuts to get to dynamic linker sections. */
820 asection
*plt_eh_frame
;
826 bfd_signed_vma refcount
;
830 /* The amount of space used by the jump slots in the GOT. */
831 bfd_vma sgotplt_jump_table_size
;
833 /* Small local sym cache. */
834 struct sym_cache sym_cache
;
836 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
837 bfd_vma (*r_sym
) (bfd_vma
);
838 unsigned int pointer_r_type
;
839 const char *dynamic_interpreter
;
840 int dynamic_interpreter_size
;
842 /* _TLS_MODULE_BASE_ symbol. */
843 struct bfd_link_hash_entry
*tls_module_base
;
845 /* Used by local STT_GNU_IFUNC symbols. */
846 htab_t loc_hash_table
;
847 void * loc_hash_memory
;
849 /* The offset into splt of the PLT entry for the TLS descriptor
850 resolver. Special values are 0, if not necessary (or not found
851 to be necessary yet), and -1 if needed but not determined
854 /* The offset into sgot of the GOT entry used by the PLT entry
858 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
859 bfd_vma next_jump_slot_index
;
860 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
861 bfd_vma next_irelative_index
;
864 /* Get the x86-64 ELF linker hash table from a link_info structure. */
866 #define elf_x86_64_hash_table(p) \
867 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
868 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
870 #define elf_x86_64_compute_jump_table_size(htab) \
871 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
873 /* Create an entry in an x86-64 ELF linker hash table. */
875 static struct bfd_hash_entry
*
876 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
877 struct bfd_hash_table
*table
,
880 /* Allocate the structure if it has not already been allocated by a
884 entry
= (struct bfd_hash_entry
*)
885 bfd_hash_allocate (table
,
886 sizeof (struct elf_x86_64_link_hash_entry
));
891 /* Call the allocation method of the superclass. */
892 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
895 struct elf_x86_64_link_hash_entry
*eh
;
897 eh
= (struct elf_x86_64_link_hash_entry
*) entry
;
898 eh
->dyn_relocs
= NULL
;
899 eh
->tls_type
= GOT_UNKNOWN
;
900 eh
->has_bnd_reloc
= FALSE
;
901 eh
->plt_bnd
.offset
= (bfd_vma
) -1;
902 eh
->plt_got
.offset
= (bfd_vma
) -1;
903 eh
->tlsdesc_got
= (bfd_vma
) -1;
909 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
910 for local symbol so that we can handle local STT_GNU_IFUNC symbols
911 as global symbol. We reuse indx and dynstr_index for local symbol
912 hash since they aren't used by global symbols in this backend. */
915 elf_x86_64_local_htab_hash (const void *ptr
)
917 struct elf_link_hash_entry
*h
918 = (struct elf_link_hash_entry
*) ptr
;
919 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
922 /* Compare local hash entries. */
925 elf_x86_64_local_htab_eq (const void *ptr1
, const void *ptr2
)
927 struct elf_link_hash_entry
*h1
928 = (struct elf_link_hash_entry
*) ptr1
;
929 struct elf_link_hash_entry
*h2
930 = (struct elf_link_hash_entry
*) ptr2
;
932 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
935 /* Find and/or create a hash entry for local symbol. */
937 static struct elf_link_hash_entry
*
938 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table
*htab
,
939 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
942 struct elf_x86_64_link_hash_entry e
, *ret
;
943 asection
*sec
= abfd
->sections
;
944 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
945 htab
->r_sym (rel
->r_info
));
948 e
.elf
.indx
= sec
->id
;
949 e
.elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
950 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
951 create
? INSERT
: NO_INSERT
);
958 ret
= (struct elf_x86_64_link_hash_entry
*) *slot
;
962 ret
= (struct elf_x86_64_link_hash_entry
*)
963 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
964 sizeof (struct elf_x86_64_link_hash_entry
));
967 memset (ret
, 0, sizeof (*ret
));
968 ret
->elf
.indx
= sec
->id
;
969 ret
->elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
970 ret
->elf
.dynindx
= -1;
971 ret
->plt_got
.offset
= (bfd_vma
) -1;
977 /* Destroy an X86-64 ELF linker hash table. */
980 elf_x86_64_link_hash_table_free (bfd
*obfd
)
982 struct elf_x86_64_link_hash_table
*htab
983 = (struct elf_x86_64_link_hash_table
*) obfd
->link
.hash
;
985 if (htab
->loc_hash_table
)
986 htab_delete (htab
->loc_hash_table
);
987 if (htab
->loc_hash_memory
)
988 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
989 _bfd_elf_link_hash_table_free (obfd
);
992 /* Create an X86-64 ELF linker hash table. */
994 static struct bfd_link_hash_table
*
995 elf_x86_64_link_hash_table_create (bfd
*abfd
)
997 struct elf_x86_64_link_hash_table
*ret
;
998 bfd_size_type amt
= sizeof (struct elf_x86_64_link_hash_table
);
1000 ret
= (struct elf_x86_64_link_hash_table
*) bfd_zmalloc (amt
);
1004 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1005 elf_x86_64_link_hash_newfunc
,
1006 sizeof (struct elf_x86_64_link_hash_entry
),
1013 if (ABI_64_P (abfd
))
1015 ret
->r_info
= elf64_r_info
;
1016 ret
->r_sym
= elf64_r_sym
;
1017 ret
->pointer_r_type
= R_X86_64_64
;
1018 ret
->dynamic_interpreter
= ELF64_DYNAMIC_INTERPRETER
;
1019 ret
->dynamic_interpreter_size
= sizeof ELF64_DYNAMIC_INTERPRETER
;
1023 ret
->r_info
= elf32_r_info
;
1024 ret
->r_sym
= elf32_r_sym
;
1025 ret
->pointer_r_type
= R_X86_64_32
;
1026 ret
->dynamic_interpreter
= ELF32_DYNAMIC_INTERPRETER
;
1027 ret
->dynamic_interpreter_size
= sizeof ELF32_DYNAMIC_INTERPRETER
;
1030 ret
->loc_hash_table
= htab_try_create (1024,
1031 elf_x86_64_local_htab_hash
,
1032 elf_x86_64_local_htab_eq
,
1034 ret
->loc_hash_memory
= objalloc_create ();
1035 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1037 elf_x86_64_link_hash_table_free (abfd
);
1040 ret
->elf
.root
.hash_table_free
= elf_x86_64_link_hash_table_free
;
1042 return &ret
->elf
.root
;
1045 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1046 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1050 elf_x86_64_create_dynamic_sections (bfd
*dynobj
,
1051 struct bfd_link_info
*info
)
1053 struct elf_x86_64_link_hash_table
*htab
;
1055 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1058 htab
= elf_x86_64_hash_table (info
);
1062 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1066 if (info
->executable
)
1068 /* Always allow copy relocs for building executables. */
1070 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
1073 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
1074 s
= bfd_make_section_anyway_with_flags (dynobj
,
1076 (bed
->dynamic_sec_flags
1079 || ! bfd_set_section_alignment (dynobj
, s
,
1080 bed
->s
->log_file_align
))
1086 if (!info
->no_ld_generated_unwind_info
1087 && htab
->plt_eh_frame
== NULL
1088 && htab
->elf
.splt
!= NULL
)
1090 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1091 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1092 | SEC_LINKER_CREATED
);
1094 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1095 if (htab
->plt_eh_frame
== NULL
1096 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 3))
1102 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1105 elf_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
1106 struct elf_link_hash_entry
*dir
,
1107 struct elf_link_hash_entry
*ind
)
1109 struct elf_x86_64_link_hash_entry
*edir
, *eind
;
1111 edir
= (struct elf_x86_64_link_hash_entry
*) dir
;
1112 eind
= (struct elf_x86_64_link_hash_entry
*) ind
;
1114 if (!edir
->has_bnd_reloc
)
1115 edir
->has_bnd_reloc
= eind
->has_bnd_reloc
;
1117 if (eind
->dyn_relocs
!= NULL
)
1119 if (edir
->dyn_relocs
!= NULL
)
1121 struct elf_dyn_relocs
**pp
;
1122 struct elf_dyn_relocs
*p
;
1124 /* Add reloc counts against the indirect sym to the direct sym
1125 list. Merge any entries against the same section. */
1126 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1128 struct elf_dyn_relocs
*q
;
1130 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1131 if (q
->sec
== p
->sec
)
1133 q
->pc_count
+= p
->pc_count
;
1134 q
->count
+= p
->count
;
1141 *pp
= edir
->dyn_relocs
;
1144 edir
->dyn_relocs
= eind
->dyn_relocs
;
1145 eind
->dyn_relocs
= NULL
;
1148 if (ind
->root
.type
== bfd_link_hash_indirect
1149 && dir
->got
.refcount
<= 0)
1151 edir
->tls_type
= eind
->tls_type
;
1152 eind
->tls_type
= GOT_UNKNOWN
;
1155 if (ELIMINATE_COPY_RELOCS
1156 && ind
->root
.type
!= bfd_link_hash_indirect
1157 && dir
->dynamic_adjusted
)
1159 /* If called to transfer flags for a weakdef during processing
1160 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1161 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1162 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1163 dir
->ref_regular
|= ind
->ref_regular
;
1164 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1165 dir
->needs_plt
|= ind
->needs_plt
;
1166 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1169 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1173 elf64_x86_64_elf_object_p (bfd
*abfd
)
1175 /* Set the right machine number for an x86-64 elf64 file. */
1176 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1181 elf32_x86_64_elf_object_p (bfd
*abfd
)
1183 /* Set the right machine number for an x86-64 elf32 file. */
1184 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1188 /* Return TRUE if the TLS access code sequence support transition
1192 elf_x86_64_check_tls_transition (bfd
*abfd
,
1193 struct bfd_link_info
*info
,
1196 Elf_Internal_Shdr
*symtab_hdr
,
1197 struct elf_link_hash_entry
**sym_hashes
,
1198 unsigned int r_type
,
1199 const Elf_Internal_Rela
*rel
,
1200 const Elf_Internal_Rela
*relend
)
1203 unsigned long r_symndx
;
1204 bfd_boolean largepic
= FALSE
;
1205 struct elf_link_hash_entry
*h
;
1207 struct elf_x86_64_link_hash_table
*htab
;
1209 /* Get the section contents. */
1210 if (contents
== NULL
)
1212 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1213 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1216 /* FIXME: How to better handle error condition? */
1217 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1220 /* Cache the section contents for elf_link_input_bfd. */
1221 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1225 htab
= elf_x86_64_hash_table (info
);
1226 offset
= rel
->r_offset
;
1229 case R_X86_64_TLSGD
:
1230 case R_X86_64_TLSLD
:
1231 if ((rel
+ 1) >= relend
)
1234 if (r_type
== R_X86_64_TLSGD
)
1236 /* Check transition from GD access model. For 64bit, only
1237 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1238 .word 0x6666; rex64; call __tls_get_addr
1239 can transit to different access model. For 32bit, only
1240 leaq foo@tlsgd(%rip), %rdi
1241 .word 0x6666; rex64; call __tls_get_addr
1242 can transit to different access model. For largepic
1244 leaq foo@tlsgd(%rip), %rdi
1245 movabsq $__tls_get_addr@pltoff, %rax
1249 static const unsigned char call
[] = { 0x66, 0x66, 0x48, 0xe8 };
1250 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1252 if ((offset
+ 12) > sec
->size
)
1255 if (memcmp (contents
+ offset
+ 4, call
, 4) != 0)
1257 if (!ABI_64_P (abfd
)
1258 || (offset
+ 19) > sec
->size
1260 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0
1261 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1262 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1267 else if (ABI_64_P (abfd
))
1270 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1276 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1282 /* Check transition from LD access model. Only
1283 leaq foo@tlsld(%rip), %rdi;
1285 can transit to different access model. For largepic
1287 leaq foo@tlsld(%rip), %rdi
1288 movabsq $__tls_get_addr@pltoff, %rax
1292 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1294 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1297 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1300 if (0xe8 != *(contents
+ offset
+ 4))
1302 if (!ABI_64_P (abfd
)
1303 || (offset
+ 19) > sec
->size
1304 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1305 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1312 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1313 if (r_symndx
< symtab_hdr
->sh_info
)
1316 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1317 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1318 may be versioned. */
1320 && h
->root
.root
.string
!= NULL
1322 ? ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLTOFF64
1323 : (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1324 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
))
1325 && (strncmp (h
->root
.root
.string
,
1326 "__tls_get_addr", 14) == 0));
1328 case R_X86_64_GOTTPOFF
:
1329 /* Check transition from IE access model:
1330 mov foo@gottpoff(%rip), %reg
1331 add foo@gottpoff(%rip), %reg
1334 /* Check REX prefix first. */
1335 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1337 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1338 if (val
!= 0x48 && val
!= 0x4c)
1340 /* X32 may have 0x44 REX prefix or no REX prefix. */
1341 if (ABI_64_P (abfd
))
1347 /* X32 may not have any REX prefix. */
1348 if (ABI_64_P (abfd
))
1350 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1354 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1355 if (val
!= 0x8b && val
!= 0x03)
1358 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1359 return (val
& 0xc7) == 5;
1361 case R_X86_64_GOTPC32_TLSDESC
:
1362 /* Check transition from GDesc access model:
1363 leaq x@tlsdesc(%rip), %rax
1365 Make sure it's a leaq adding rip to a 32-bit offset
1366 into any register, although it's probably almost always
1369 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1372 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1373 if ((val
& 0xfb) != 0x48)
1376 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1379 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1380 return (val
& 0xc7) == 0x05;
1382 case R_X86_64_TLSDESC_CALL
:
1383 /* Check transition from GDesc access model:
1384 call *x@tlsdesc(%rax)
1386 if (offset
+ 2 <= sec
->size
)
1388 /* Make sure that it's a call *x@tlsdesc(%rax). */
1389 static const unsigned char call
[] = { 0xff, 0x10 };
1390 return memcmp (contents
+ offset
, call
, 2) == 0;
1400 /* Return TRUE if the TLS access transition is OK or no transition
1401 will be performed. Update R_TYPE if there is a transition. */
1404 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1405 asection
*sec
, bfd_byte
*contents
,
1406 Elf_Internal_Shdr
*symtab_hdr
,
1407 struct elf_link_hash_entry
**sym_hashes
,
1408 unsigned int *r_type
, int tls_type
,
1409 const Elf_Internal_Rela
*rel
,
1410 const Elf_Internal_Rela
*relend
,
1411 struct elf_link_hash_entry
*h
,
1412 unsigned long r_symndx
)
1414 unsigned int from_type
= *r_type
;
1415 unsigned int to_type
= from_type
;
1416 bfd_boolean check
= TRUE
;
1418 /* Skip TLS transition for functions. */
1420 && (h
->type
== STT_FUNC
1421 || h
->type
== STT_GNU_IFUNC
))
1426 case R_X86_64_TLSGD
:
1427 case R_X86_64_GOTPC32_TLSDESC
:
1428 case R_X86_64_TLSDESC_CALL
:
1429 case R_X86_64_GOTTPOFF
:
1430 if (info
->executable
)
1433 to_type
= R_X86_64_TPOFF32
;
1435 to_type
= R_X86_64_GOTTPOFF
;
1438 /* When we are called from elf_x86_64_relocate_section,
1439 CONTENTS isn't NULL and there may be additional transitions
1440 based on TLS_TYPE. */
1441 if (contents
!= NULL
)
1443 unsigned int new_to_type
= to_type
;
1445 if (info
->executable
1448 && tls_type
== GOT_TLS_IE
)
1449 new_to_type
= R_X86_64_TPOFF32
;
1451 if (to_type
== R_X86_64_TLSGD
1452 || to_type
== R_X86_64_GOTPC32_TLSDESC
1453 || to_type
== R_X86_64_TLSDESC_CALL
)
1455 if (tls_type
== GOT_TLS_IE
)
1456 new_to_type
= R_X86_64_GOTTPOFF
;
1459 /* We checked the transition before when we were called from
1460 elf_x86_64_check_relocs. We only want to check the new
1461 transition which hasn't been checked before. */
1462 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1463 to_type
= new_to_type
;
1468 case R_X86_64_TLSLD
:
1469 if (info
->executable
)
1470 to_type
= R_X86_64_TPOFF32
;
1477 /* Return TRUE if there is no transition. */
1478 if (from_type
== to_type
)
1481 /* Check if the transition can be performed. */
1483 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1484 symtab_hdr
, sym_hashes
,
1485 from_type
, rel
, relend
))
1487 reloc_howto_type
*from
, *to
;
1490 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1491 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1494 name
= h
->root
.root
.string
;
1497 struct elf_x86_64_link_hash_table
*htab
;
1499 htab
= elf_x86_64_hash_table (info
);
1504 Elf_Internal_Sym
*isym
;
1506 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1508 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1512 (*_bfd_error_handler
)
1513 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1514 "in section `%A' failed"),
1515 abfd
, sec
, from
->name
, to
->name
, name
,
1516 (unsigned long) rel
->r_offset
);
1517 bfd_set_error (bfd_error_bad_value
);
1525 /* Look through the relocs for a section during the first phase, and
1526 calculate needed space in the global offset table, procedure
1527 linkage table, and dynamic reloc sections. */
1530 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1532 const Elf_Internal_Rela
*relocs
)
1534 struct elf_x86_64_link_hash_table
*htab
;
1535 Elf_Internal_Shdr
*symtab_hdr
;
1536 struct elf_link_hash_entry
**sym_hashes
;
1537 const Elf_Internal_Rela
*rel
;
1538 const Elf_Internal_Rela
*rel_end
;
1540 bfd_boolean use_plt_got
;
1542 if (info
->relocatable
)
1545 BFD_ASSERT (is_x86_64_elf (abfd
));
1547 htab
= elf_x86_64_hash_table (info
);
1551 use_plt_got
= get_elf_x86_64_backend_data (abfd
) == &elf_x86_64_arch_bed
;
1553 symtab_hdr
= &elf_symtab_hdr (abfd
);
1554 sym_hashes
= elf_sym_hashes (abfd
);
1558 rel_end
= relocs
+ sec
->reloc_count
;
1559 for (rel
= relocs
; rel
< rel_end
; rel
++)
1561 unsigned int r_type
;
1562 unsigned long r_symndx
;
1563 struct elf_link_hash_entry
*h
;
1564 Elf_Internal_Sym
*isym
;
1566 bfd_boolean size_reloc
;
1568 r_symndx
= htab
->r_sym (rel
->r_info
);
1569 r_type
= ELF32_R_TYPE (rel
->r_info
);
1571 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1573 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1578 if (r_symndx
< symtab_hdr
->sh_info
)
1580 /* A local symbol. */
1581 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1586 /* Check relocation against local STT_GNU_IFUNC symbol. */
1587 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1589 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
,
1594 /* Fake a STT_GNU_IFUNC symbol. */
1595 h
->type
= STT_GNU_IFUNC
;
1598 h
->forced_local
= 1;
1599 h
->root
.type
= bfd_link_hash_defined
;
1607 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1608 while (h
->root
.type
== bfd_link_hash_indirect
1609 || h
->root
.type
== bfd_link_hash_warning
)
1610 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1613 /* Check invalid x32 relocations. */
1614 if (!ABI_64_P (abfd
))
1620 case R_X86_64_DTPOFF64
:
1621 case R_X86_64_TPOFF64
:
1623 case R_X86_64_GOTOFF64
:
1624 case R_X86_64_GOT64
:
1625 case R_X86_64_GOTPCREL64
:
1626 case R_X86_64_GOTPC64
:
1627 case R_X86_64_GOTPLT64
:
1628 case R_X86_64_PLTOFF64
:
1631 name
= h
->root
.root
.string
;
1633 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1635 (*_bfd_error_handler
)
1636 (_("%B: relocation %s against symbol `%s' isn't "
1637 "supported in x32 mode"), abfd
,
1638 x86_64_elf_howto_table
[r_type
].name
, name
);
1639 bfd_set_error (bfd_error_bad_value
);
1647 /* Create the ifunc sections for static executables. If we
1648 never see an indirect function symbol nor we are building
1649 a static executable, those sections will be empty and
1650 won't appear in output. */
1656 case R_X86_64_PC32_BND
:
1657 case R_X86_64_PLT32_BND
:
1659 case R_X86_64_PLT32
:
1662 /* MPX PLT is supported only if elf_x86_64_arch_bed
1663 is used in 64-bit mode. */
1666 && (get_elf_x86_64_backend_data (abfd
)
1667 == &elf_x86_64_arch_bed
))
1669 elf_x86_64_hash_entry (h
)->has_bnd_reloc
= TRUE
;
1671 /* Create the second PLT for Intel MPX support. */
1672 if (htab
->plt_bnd
== NULL
)
1674 unsigned int plt_bnd_align
;
1675 const struct elf_backend_data
*bed
;
1677 bed
= get_elf_backend_data (info
->output_bfd
);
1678 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry
) == 8
1679 && (sizeof (elf_x86_64_bnd_plt2_entry
)
1680 == sizeof (elf_x86_64_legacy_plt2_entry
)));
1683 if (htab
->elf
.dynobj
== NULL
)
1684 htab
->elf
.dynobj
= abfd
;
1686 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1688 (bed
->dynamic_sec_flags
1693 if (htab
->plt_bnd
== NULL
1694 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1703 case R_X86_64_GOTPCREL
:
1704 case R_X86_64_GOTPCREL64
:
1705 if (htab
->elf
.dynobj
== NULL
)
1706 htab
->elf
.dynobj
= abfd
;
1707 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1712 /* It is referenced by a non-shared object. */
1714 h
->root
.non_ir_ref
= 1;
1717 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1718 symtab_hdr
, sym_hashes
,
1719 &r_type
, GOT_UNKNOWN
,
1720 rel
, rel_end
, h
, r_symndx
))
1725 case R_X86_64_TLSLD
:
1726 htab
->tls_ld_got
.refcount
+= 1;
1729 case R_X86_64_TPOFF32
:
1730 if (!info
->executable
&& ABI_64_P (abfd
))
1733 name
= h
->root
.root
.string
;
1735 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1737 (*_bfd_error_handler
)
1738 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1740 x86_64_elf_howto_table
[r_type
].name
, name
);
1741 bfd_set_error (bfd_error_bad_value
);
1746 case R_X86_64_GOTTPOFF
:
1747 if (!info
->executable
)
1748 info
->flags
|= DF_STATIC_TLS
;
1751 case R_X86_64_GOT32
:
1752 case R_X86_64_GOTPCREL
:
1753 case R_X86_64_TLSGD
:
1754 case R_X86_64_GOT64
:
1755 case R_X86_64_GOTPCREL64
:
1756 case R_X86_64_GOTPLT64
:
1757 case R_X86_64_GOTPC32_TLSDESC
:
1758 case R_X86_64_TLSDESC_CALL
:
1759 /* This symbol requires a global offset table entry. */
1761 int tls_type
, old_tls_type
;
1765 default: tls_type
= GOT_NORMAL
; break;
1766 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1767 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1768 case R_X86_64_GOTPC32_TLSDESC
:
1769 case R_X86_64_TLSDESC_CALL
:
1770 tls_type
= GOT_TLS_GDESC
; break;
1775 h
->got
.refcount
+= 1;
1776 old_tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
1780 bfd_signed_vma
*local_got_refcounts
;
1782 /* This is a global offset table entry for a local symbol. */
1783 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1784 if (local_got_refcounts
== NULL
)
1788 size
= symtab_hdr
->sh_info
;
1789 size
*= sizeof (bfd_signed_vma
)
1790 + sizeof (bfd_vma
) + sizeof (char);
1791 local_got_refcounts
= ((bfd_signed_vma
*)
1792 bfd_zalloc (abfd
, size
));
1793 if (local_got_refcounts
== NULL
)
1795 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1796 elf_x86_64_local_tlsdesc_gotent (abfd
)
1797 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1798 elf_x86_64_local_got_tls_type (abfd
)
1799 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1801 local_got_refcounts
[r_symndx
] += 1;
1803 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1806 /* If a TLS symbol is accessed using IE at least once,
1807 there is no point to use dynamic model for it. */
1808 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1809 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1810 || tls_type
!= GOT_TLS_IE
))
1812 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1813 tls_type
= old_tls_type
;
1814 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1815 && GOT_TLS_GD_ANY_P (tls_type
))
1816 tls_type
|= old_tls_type
;
1820 name
= h
->root
.root
.string
;
1822 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1824 (*_bfd_error_handler
)
1825 (_("%B: '%s' accessed both as normal and thread local symbol"),
1827 bfd_set_error (bfd_error_bad_value
);
1832 if (old_tls_type
!= tls_type
)
1835 elf_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1837 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1842 case R_X86_64_GOTOFF64
:
1843 case R_X86_64_GOTPC32
:
1844 case R_X86_64_GOTPC64
:
1846 if (htab
->elf
.sgot
== NULL
)
1848 if (htab
->elf
.dynobj
== NULL
)
1849 htab
->elf
.dynobj
= abfd
;
1850 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1856 case R_X86_64_PLT32
:
1857 case R_X86_64_PLT32_BND
:
1858 /* This symbol requires a procedure linkage table entry. We
1859 actually build the entry in adjust_dynamic_symbol,
1860 because this might be a case of linking PIC code which is
1861 never referenced by a dynamic object, in which case we
1862 don't need to generate a procedure linkage table entry
1865 /* If this is a local symbol, we resolve it directly without
1866 creating a procedure linkage table entry. */
1871 h
->plt
.refcount
+= 1;
1874 case R_X86_64_PLTOFF64
:
1875 /* This tries to form the 'address' of a function relative
1876 to GOT. For global symbols we need a PLT entry. */
1880 h
->plt
.refcount
+= 1;
1884 case R_X86_64_SIZE32
:
1885 case R_X86_64_SIZE64
:
1890 if (!ABI_64_P (abfd
))
1895 /* Let's help debug shared library creation. These relocs
1896 cannot be used in shared libs. Don't error out for
1897 sections we don't care about, such as debug sections or
1898 non-constant sections. */
1900 && (sec
->flags
& SEC_ALLOC
) != 0
1901 && (sec
->flags
& SEC_READONLY
) != 0)
1904 name
= h
->root
.root
.string
;
1906 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1907 (*_bfd_error_handler
)
1908 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1909 abfd
, x86_64_elf_howto_table
[r_type
].name
, name
);
1910 bfd_set_error (bfd_error_bad_value
);
1918 case R_X86_64_PC32_BND
:
1922 if (h
!= NULL
&& info
->executable
)
1924 /* If this reloc is in a read-only section, we might
1925 need a copy reloc. We can't check reliably at this
1926 stage whether the section is read-only, as input
1927 sections have not yet been mapped to output sections.
1928 Tentatively set the flag for now, and correct in
1929 adjust_dynamic_symbol. */
1932 /* We may need a .plt entry if the function this reloc
1933 refers to is in a shared lib. */
1934 h
->plt
.refcount
+= 1;
1935 if (r_type
!= R_X86_64_PC32
1936 && r_type
!= R_X86_64_PC32_BND
1937 && r_type
!= R_X86_64_PC64
)
1938 h
->pointer_equality_needed
= 1;
1943 /* If we are creating a shared library, and this is a reloc
1944 against a global symbol, or a non PC relative reloc
1945 against a local symbol, then we need to copy the reloc
1946 into the shared library. However, if we are linking with
1947 -Bsymbolic, we do not need to copy a reloc against a
1948 global symbol which is defined in an object we are
1949 including in the link (i.e., DEF_REGULAR is set). At
1950 this point we have not seen all the input files, so it is
1951 possible that DEF_REGULAR is not set now but will be set
1952 later (it is never cleared). In case of a weak definition,
1953 DEF_REGULAR may be cleared later by a strong definition in
1954 a shared library. We account for that possibility below by
1955 storing information in the relocs_copied field of the hash
1956 table entry. A similar situation occurs when creating
1957 shared libraries and symbol visibility changes render the
1958 symbol local. We allow copy relocs for non-GOT pc-relative
1961 If on the other hand, we are creating an executable, we
1962 may need to keep relocations for symbols satisfied by a
1963 dynamic library if we manage to avoid copy relocs for the
1966 && (sec
->flags
& SEC_ALLOC
) != 0
1967 && (! IS_X86_64_PCREL_TYPE (r_type
)
1970 && (! SYMBOLIC_BIND (info
, h
)
1971 || h
->root
.type
== bfd_link_hash_defweak
1972 || !h
->def_regular
))))
1973 || (ELIMINATE_COPY_RELOCS
1975 && (sec
->flags
& SEC_ALLOC
) != 0
1977 && (h
->root
.type
== bfd_link_hash_defweak
1978 || !h
->def_regular
)))
1980 struct elf_dyn_relocs
*p
;
1981 struct elf_dyn_relocs
**head
;
1983 /* We must copy these reloc types into the output file.
1984 Create a reloc section in dynobj and make room for
1988 if (htab
->elf
.dynobj
== NULL
)
1989 htab
->elf
.dynobj
= abfd
;
1991 sreloc
= _bfd_elf_make_dynamic_reloc_section
1992 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
1993 abfd
, /*rela?*/ TRUE
);
1999 /* If this is a global symbol, we count the number of
2000 relocations we need for this symbol. */
2003 head
= &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
2007 /* Track dynamic relocs needed for local syms too.
2008 We really need local syms available to do this
2013 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2018 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2022 /* Beware of type punned pointers vs strict aliasing
2024 vpp
= &(elf_section_data (s
)->local_dynrel
);
2025 head
= (struct elf_dyn_relocs
**)vpp
;
2029 if (p
== NULL
|| p
->sec
!= sec
)
2031 bfd_size_type amt
= sizeof *p
;
2033 p
= ((struct elf_dyn_relocs
*)
2034 bfd_alloc (htab
->elf
.dynobj
, amt
));
2045 /* Count size relocation as PC-relative relocation. */
2046 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
2051 /* This relocation describes the C++ object vtable hierarchy.
2052 Reconstruct it for later use during GC. */
2053 case R_X86_64_GNU_VTINHERIT
:
2054 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2058 /* This relocation describes which C++ vtable entries are actually
2059 used. Record for later use during GC. */
2060 case R_X86_64_GNU_VTENTRY
:
2061 BFD_ASSERT (h
!= NULL
);
2063 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2073 && h
->plt
.refcount
> 0
2074 && h
->got
.refcount
> 0
2075 && htab
->plt_got
== NULL
)
2077 /* Create the GOT procedure linkage table. */
2078 unsigned int plt_got_align
;
2079 const struct elf_backend_data
*bed
;
2081 bed
= get_elf_backend_data (info
->output_bfd
);
2082 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry
) == 8
2083 && (sizeof (elf_x86_64_bnd_plt2_entry
)
2084 == sizeof (elf_x86_64_legacy_plt2_entry
)));
2087 if (htab
->elf
.dynobj
== NULL
)
2088 htab
->elf
.dynobj
= abfd
;
2090 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
2092 (bed
->dynamic_sec_flags
2097 if (htab
->plt_got
== NULL
2098 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
2108 /* Return the section that should be marked against GC for a given
2112 elf_x86_64_gc_mark_hook (asection
*sec
,
2113 struct bfd_link_info
*info
,
2114 Elf_Internal_Rela
*rel
,
2115 struct elf_link_hash_entry
*h
,
2116 Elf_Internal_Sym
*sym
)
2119 switch (ELF32_R_TYPE (rel
->r_info
))
2121 case R_X86_64_GNU_VTINHERIT
:
2122 case R_X86_64_GNU_VTENTRY
:
2126 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2129 /* Update the got entry reference counts for the section being removed. */
2132 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
2134 const Elf_Internal_Rela
*relocs
)
2136 struct elf_x86_64_link_hash_table
*htab
;
2137 Elf_Internal_Shdr
*symtab_hdr
;
2138 struct elf_link_hash_entry
**sym_hashes
;
2139 bfd_signed_vma
*local_got_refcounts
;
2140 const Elf_Internal_Rela
*rel
, *relend
;
2142 if (info
->relocatable
)
2145 htab
= elf_x86_64_hash_table (info
);
2149 elf_section_data (sec
)->local_dynrel
= NULL
;
2151 symtab_hdr
= &elf_symtab_hdr (abfd
);
2152 sym_hashes
= elf_sym_hashes (abfd
);
2153 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2155 htab
= elf_x86_64_hash_table (info
);
2156 relend
= relocs
+ sec
->reloc_count
;
2157 for (rel
= relocs
; rel
< relend
; rel
++)
2159 unsigned long r_symndx
;
2160 unsigned int r_type
;
2161 struct elf_link_hash_entry
*h
= NULL
;
2163 r_symndx
= htab
->r_sym (rel
->r_info
);
2164 if (r_symndx
>= symtab_hdr
->sh_info
)
2166 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2167 while (h
->root
.type
== bfd_link_hash_indirect
2168 || h
->root
.type
== bfd_link_hash_warning
)
2169 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2173 /* A local symbol. */
2174 Elf_Internal_Sym
*isym
;
2176 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2179 /* Check relocation against local STT_GNU_IFUNC symbol. */
2181 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2183 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2191 struct elf_x86_64_link_hash_entry
*eh
;
2192 struct elf_dyn_relocs
**pp
;
2193 struct elf_dyn_relocs
*p
;
2195 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2197 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2200 /* Everything must go for SEC. */
2206 r_type
= ELF32_R_TYPE (rel
->r_info
);
2207 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
2208 symtab_hdr
, sym_hashes
,
2209 &r_type
, GOT_UNKNOWN
,
2210 rel
, relend
, h
, r_symndx
))
2215 case R_X86_64_TLSLD
:
2216 if (htab
->tls_ld_got
.refcount
> 0)
2217 htab
->tls_ld_got
.refcount
-= 1;
2220 case R_X86_64_TLSGD
:
2221 case R_X86_64_GOTPC32_TLSDESC
:
2222 case R_X86_64_TLSDESC_CALL
:
2223 case R_X86_64_GOTTPOFF
:
2224 case R_X86_64_GOT32
:
2225 case R_X86_64_GOTPCREL
:
2226 case R_X86_64_GOT64
:
2227 case R_X86_64_GOTPCREL64
:
2228 case R_X86_64_GOTPLT64
:
2231 if (h
->got
.refcount
> 0)
2232 h
->got
.refcount
-= 1;
2233 if (h
->type
== STT_GNU_IFUNC
)
2235 if (h
->plt
.refcount
> 0)
2236 h
->plt
.refcount
-= 1;
2239 else if (local_got_refcounts
!= NULL
)
2241 if (local_got_refcounts
[r_symndx
] > 0)
2242 local_got_refcounts
[r_symndx
] -= 1;
2254 case R_X86_64_PC32_BND
:
2256 case R_X86_64_SIZE32
:
2257 case R_X86_64_SIZE64
:
2259 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2263 case R_X86_64_PLT32
:
2264 case R_X86_64_PLT32_BND
:
2265 case R_X86_64_PLTOFF64
:
2268 if (h
->plt
.refcount
> 0)
2269 h
->plt
.refcount
-= 1;
2281 /* Adjust a symbol defined by a dynamic object and referenced by a
2282 regular object. The current definition is in some section of the
2283 dynamic object, but we're not including those sections. We have to
2284 change the definition to something the rest of the link can
2288 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2289 struct elf_link_hash_entry
*h
)
2291 struct elf_x86_64_link_hash_table
*htab
;
2293 struct elf_x86_64_link_hash_entry
*eh
;
2294 struct elf_dyn_relocs
*p
;
2296 /* STT_GNU_IFUNC symbol must go through PLT. */
2297 if (h
->type
== STT_GNU_IFUNC
)
2299 /* All local STT_GNU_IFUNC references must be treate as local
2300 calls via local PLT. */
2302 && SYMBOL_CALLS_LOCAL (info
, h
))
2304 bfd_size_type pc_count
= 0, count
= 0;
2305 struct elf_dyn_relocs
**pp
;
2307 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2308 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2310 pc_count
+= p
->pc_count
;
2311 p
->count
-= p
->pc_count
;
2320 if (pc_count
|| count
)
2324 if (h
->plt
.refcount
<= 0)
2325 h
->plt
.refcount
= 1;
2327 h
->plt
.refcount
+= 1;
2331 if (h
->plt
.refcount
<= 0)
2333 h
->plt
.offset
= (bfd_vma
) -1;
2339 /* If this is a function, put it in the procedure linkage table. We
2340 will fill in the contents of the procedure linkage table later,
2341 when we know the address of the .got section. */
2342 if (h
->type
== STT_FUNC
2345 if (h
->plt
.refcount
<= 0
2346 || SYMBOL_CALLS_LOCAL (info
, h
)
2347 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2348 && h
->root
.type
== bfd_link_hash_undefweak
))
2350 /* This case can occur if we saw a PLT32 reloc in an input
2351 file, but the symbol was never referred to by a dynamic
2352 object, or if all references were garbage collected. In
2353 such a case, we don't actually need to build a procedure
2354 linkage table, and we can just do a PC32 reloc instead. */
2355 h
->plt
.offset
= (bfd_vma
) -1;
2362 /* It's possible that we incorrectly decided a .plt reloc was
2363 needed for an R_X86_64_PC32 reloc to a non-function sym in
2364 check_relocs. We can't decide accurately between function and
2365 non-function syms in check-relocs; Objects loaded later in
2366 the link may change h->type. So fix it now. */
2367 h
->plt
.offset
= (bfd_vma
) -1;
2369 /* If this is a weak symbol, and there is a real definition, the
2370 processor independent code will have arranged for us to see the
2371 real definition first, and we can just use the same value. */
2372 if (h
->u
.weakdef
!= NULL
)
2374 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2375 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2376 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2377 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2378 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2379 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2383 /* This is a reference to a symbol defined by a dynamic object which
2384 is not a function. */
2386 /* If we are creating a shared library, we must presume that the
2387 only references to the symbol are via the global offset table.
2388 For such cases we need not do anything here; the relocations will
2389 be handled correctly by relocate_section. */
2390 if (!info
->executable
)
2393 /* If there are no references to this symbol that do not use the
2394 GOT, we don't need to generate a copy reloc. */
2395 if (!h
->non_got_ref
)
2398 /* If -z nocopyreloc was given, we won't generate them either. */
2399 if (info
->nocopyreloc
)
2405 if (ELIMINATE_COPY_RELOCS
&& !info
->shared
)
2407 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2408 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2410 s
= p
->sec
->output_section
;
2411 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2415 /* If we didn't find any dynamic relocs in read-only sections, then
2416 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2424 /* We must allocate the symbol in our .dynbss section, which will
2425 become part of the .bss section of the executable. There will be
2426 an entry for this symbol in the .dynsym section. The dynamic
2427 object will contain position independent code, so all references
2428 from the dynamic object to this symbol will go through the global
2429 offset table. The dynamic linker will use the .dynsym entry to
2430 determine the address it must put in the global offset table, so
2431 both the dynamic object and the regular object will refer to the
2432 same memory location for the variable. */
2434 htab
= elf_x86_64_hash_table (info
);
2438 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2439 to copy the initial value out of the dynamic object and into the
2440 runtime process image. */
2441 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2443 const struct elf_backend_data
*bed
;
2444 bed
= get_elf_backend_data (info
->output_bfd
);
2445 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2451 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2454 /* Allocate space in .plt, .got and associated reloc sections for
2458 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2460 struct bfd_link_info
*info
;
2461 struct elf_x86_64_link_hash_table
*htab
;
2462 struct elf_x86_64_link_hash_entry
*eh
;
2463 struct elf_dyn_relocs
*p
;
2464 const struct elf_backend_data
*bed
;
2465 unsigned int plt_entry_size
;
2467 if (h
->root
.type
== bfd_link_hash_indirect
)
2470 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2472 info
= (struct bfd_link_info
*) inf
;
2473 htab
= elf_x86_64_hash_table (info
);
2476 bed
= get_elf_backend_data (info
->output_bfd
);
2477 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2479 /* We can't use the GOT PLT if pointer equality is needed since
2480 finish_dynamic_symbol won't clear symbol value and the dynamic
2481 linker won't update the GOT slot. We will get into an infinite
2482 loop at run-time. */
2483 if (htab
->plt_got
!= NULL
2484 && h
->type
!= STT_GNU_IFUNC
2485 && !h
->pointer_equality_needed
2486 && h
->plt
.refcount
> 0
2487 && h
->got
.refcount
> 0)
2489 /* Don't use the regular PLT if there are both GOT and GOTPLT
2491 h
->plt
.offset
= (bfd_vma
) -1;
2493 /* Use the GOT PLT. */
2494 eh
->plt_got
.refcount
= 1;
2497 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2498 here if it is defined and referenced in a non-shared object. */
2499 if (h
->type
== STT_GNU_IFUNC
2502 if (_bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2508 asection
*s
= htab
->plt_bnd
;
2509 if (h
->plt
.offset
!= (bfd_vma
) -1 && s
!= NULL
)
2511 /* Use the .plt.bnd section if it is created. */
2512 eh
->plt_bnd
.offset
= s
->size
;
2514 /* Make room for this entry in the .plt.bnd section. */
2515 s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2523 else if (htab
->elf
.dynamic_sections_created
2524 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2526 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
2528 /* Make sure this symbol is output as a dynamic symbol.
2529 Undefined weak syms won't yet be marked as dynamic. */
2530 if (h
->dynindx
== -1
2531 && !h
->forced_local
)
2533 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2538 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2540 asection
*s
= htab
->elf
.splt
;
2541 asection
*bnd_s
= htab
->plt_bnd
;
2542 asection
*got_s
= htab
->plt_got
;
2544 /* If this is the first .plt entry, make room for the special
2547 s
->size
= plt_entry_size
;
2550 eh
->plt_got
.offset
= got_s
->size
;
2553 h
->plt
.offset
= s
->size
;
2555 eh
->plt_bnd
.offset
= bnd_s
->size
;
2558 /* If this symbol is not defined in a regular file, and we are
2559 not generating a shared library, then set the symbol to this
2560 location in the .plt. This is required to make function
2561 pointers compare as equal between the normal executable and
2562 the shared library. */
2568 /* We need to make a call to the entry of the GOT PLT
2569 instead of regular PLT entry. */
2570 h
->root
.u
.def
.section
= got_s
;
2571 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2577 /* We need to make a call to the entry of the second
2578 PLT instead of regular PLT entry. */
2579 h
->root
.u
.def
.section
= bnd_s
;
2580 h
->root
.u
.def
.value
= eh
->plt_bnd
.offset
;
2584 h
->root
.u
.def
.section
= s
;
2585 h
->root
.u
.def
.value
= h
->plt
.offset
;
2590 /* Make room for this entry. */
2592 got_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2595 s
->size
+= plt_entry_size
;
2597 bnd_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2599 /* We also need to make an entry in the .got.plt section,
2600 which will be placed in the .got section by the linker
2602 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2604 /* We also need to make an entry in the .rela.plt
2606 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2607 htab
->elf
.srelplt
->reloc_count
++;
2612 h
->plt
.offset
= (bfd_vma
) -1;
2618 h
->plt
.offset
= (bfd_vma
) -1;
2622 eh
->tlsdesc_got
= (bfd_vma
) -1;
2624 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2625 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2626 if (h
->got
.refcount
> 0
2629 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2631 h
->got
.offset
= (bfd_vma
) -1;
2633 else if (h
->got
.refcount
> 0)
2637 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2639 /* Make sure this symbol is output as a dynamic symbol.
2640 Undefined weak syms won't yet be marked as dynamic. */
2641 if (h
->dynindx
== -1
2642 && !h
->forced_local
)
2644 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2648 if (GOT_TLS_GDESC_P (tls_type
))
2650 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2651 - elf_x86_64_compute_jump_table_size (htab
);
2652 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2653 h
->got
.offset
= (bfd_vma
) -2;
2655 if (! GOT_TLS_GDESC_P (tls_type
)
2656 || GOT_TLS_GD_P (tls_type
))
2659 h
->got
.offset
= s
->size
;
2660 s
->size
+= GOT_ENTRY_SIZE
;
2661 if (GOT_TLS_GD_P (tls_type
))
2662 s
->size
+= GOT_ENTRY_SIZE
;
2664 dyn
= htab
->elf
.dynamic_sections_created
;
2665 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2667 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2668 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2669 || tls_type
== GOT_TLS_IE
)
2670 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2671 else if (GOT_TLS_GD_P (tls_type
))
2672 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2673 else if (! GOT_TLS_GDESC_P (tls_type
)
2674 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2675 || h
->root
.type
!= bfd_link_hash_undefweak
)
2677 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2678 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2679 if (GOT_TLS_GDESC_P (tls_type
))
2681 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2682 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2686 h
->got
.offset
= (bfd_vma
) -1;
2688 if (eh
->dyn_relocs
== NULL
)
2691 /* In the shared -Bsymbolic case, discard space allocated for
2692 dynamic pc-relative relocs against symbols which turn out to be
2693 defined in regular objects. For the normal shared case, discard
2694 space for pc-relative relocs that have become local due to symbol
2695 visibility changes. */
2699 /* Relocs that use pc_count are those that appear on a call
2700 insn, or certain REL relocs that can generated via assembly.
2701 We want calls to protected symbols to resolve directly to the
2702 function rather than going via the plt. If people want
2703 function pointer comparisons to work as expected then they
2704 should avoid writing weird assembly. */
2705 if (SYMBOL_CALLS_LOCAL (info
, h
))
2707 struct elf_dyn_relocs
**pp
;
2709 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2711 p
->count
-= p
->pc_count
;
2720 /* Also discard relocs on undefined weak syms with non-default
2722 if (eh
->dyn_relocs
!= NULL
2723 && h
->root
.type
== bfd_link_hash_undefweak
)
2725 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2726 eh
->dyn_relocs
= NULL
;
2728 /* Make sure undefined weak symbols are output as a dynamic
2730 else if (h
->dynindx
== -1
2731 && ! h
->forced_local
2732 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2737 else if (ELIMINATE_COPY_RELOCS
)
2739 /* For the non-shared case, discard space for relocs against
2740 symbols which turn out to need copy relocs or are not
2746 || (htab
->elf
.dynamic_sections_created
2747 && (h
->root
.type
== bfd_link_hash_undefweak
2748 || h
->root
.type
== bfd_link_hash_undefined
))))
2750 /* Make sure this symbol is output as a dynamic symbol.
2751 Undefined weak syms won't yet be marked as dynamic. */
2752 if (h
->dynindx
== -1
2753 && ! h
->forced_local
2754 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2757 /* If that succeeded, we know we'll be keeping all the
2759 if (h
->dynindx
!= -1)
2763 eh
->dyn_relocs
= NULL
;
2768 /* Finally, allocate space. */
2769 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2773 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2775 BFD_ASSERT (sreloc
!= NULL
);
2777 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2783 /* Allocate space in .plt, .got and associated reloc sections for
2784 local dynamic relocs. */
2787 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2789 struct elf_link_hash_entry
*h
2790 = (struct elf_link_hash_entry
*) *slot
;
2792 if (h
->type
!= STT_GNU_IFUNC
2796 || h
->root
.type
!= bfd_link_hash_defined
)
2799 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2802 /* Find any dynamic relocs that apply to read-only sections. */
2805 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2808 struct elf_x86_64_link_hash_entry
*eh
;
2809 struct elf_dyn_relocs
*p
;
2811 /* Skip local IFUNC symbols. */
2812 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2815 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2816 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2818 asection
*s
= p
->sec
->output_section
;
2820 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2822 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2824 info
->flags
|= DF_TEXTREL
;
2826 if (info
->warn_shared_textrel
&& info
->shared
)
2827 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2828 p
->sec
->owner
, h
->root
.root
.string
,
2831 /* Not an error, just cut short the traversal. */
2839 mov foo@GOTPCREL(%rip), %reg
2842 with the local symbol, foo. */
2845 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2846 struct bfd_link_info
*link_info
)
2848 Elf_Internal_Shdr
*symtab_hdr
;
2849 Elf_Internal_Rela
*internal_relocs
;
2850 Elf_Internal_Rela
*irel
, *irelend
;
2852 struct elf_x86_64_link_hash_table
*htab
;
2853 bfd_boolean changed_contents
;
2854 bfd_boolean changed_relocs
;
2855 bfd_signed_vma
*local_got_refcounts
;
2857 /* Don't even try to convert non-ELF outputs. */
2858 if (!is_elf_hash_table (link_info
->hash
))
2861 /* Nothing to do if there are no codes, no relocations or no output. */
2862 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2863 || sec
->reloc_count
== 0
2864 || bfd_is_abs_section (sec
->output_section
))
2867 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2869 /* Load the relocations for this section. */
2870 internal_relocs
= (_bfd_elf_link_read_relocs
2871 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2872 link_info
->keep_memory
));
2873 if (internal_relocs
== NULL
)
2876 htab
= elf_x86_64_hash_table (link_info
);
2877 changed_contents
= FALSE
;
2878 changed_relocs
= FALSE
;
2879 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2881 /* Get the section contents. */
2882 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2883 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2886 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2890 irelend
= internal_relocs
+ sec
->reloc_count
;
2891 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2893 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2894 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2896 struct elf_link_hash_entry
*h
;
2898 if (r_type
!= R_X86_64_GOTPCREL
)
2901 /* Get the symbol referred to by the reloc. */
2902 if (r_symndx
< symtab_hdr
->sh_info
)
2904 Elf_Internal_Sym
*isym
;
2906 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2909 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2910 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2911 && irel
->r_offset
>= 2
2912 && bfd_get_8 (input_bfd
,
2913 contents
+ irel
->r_offset
- 2) == 0x8b)
2915 bfd_put_8 (output_bfd
, 0x8d,
2916 contents
+ irel
->r_offset
- 2);
2917 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2918 if (local_got_refcounts
!= NULL
2919 && local_got_refcounts
[r_symndx
] > 0)
2920 local_got_refcounts
[r_symndx
] -= 1;
2921 changed_contents
= TRUE
;
2922 changed_relocs
= TRUE
;
2927 indx
= r_symndx
- symtab_hdr
->sh_info
;
2928 h
= elf_sym_hashes (abfd
)[indx
];
2929 BFD_ASSERT (h
!= NULL
);
2931 while (h
->root
.type
== bfd_link_hash_indirect
2932 || h
->root
.type
== bfd_link_hash_warning
)
2933 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2935 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2936 avoid optimizing _DYNAMIC since ld.so may use its link-time
2939 && h
->type
!= STT_GNU_IFUNC
2940 && h
!= htab
->elf
.hdynamic
2941 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2942 && irel
->r_offset
>= 2
2943 && bfd_get_8 (input_bfd
,
2944 contents
+ irel
->r_offset
- 2) == 0x8b)
2946 bfd_put_8 (output_bfd
, 0x8d,
2947 contents
+ irel
->r_offset
- 2);
2948 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2949 if (h
->got
.refcount
> 0)
2950 h
->got
.refcount
-= 1;
2951 changed_contents
= TRUE
;
2952 changed_relocs
= TRUE
;
2956 if (contents
!= NULL
2957 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2959 if (!changed_contents
&& !link_info
->keep_memory
)
2963 /* Cache the section contents for elf_link_input_bfd. */
2964 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2968 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2970 if (!changed_relocs
)
2971 free (internal_relocs
);
2973 elf_section_data (sec
)->relocs
= internal_relocs
;
2979 if (contents
!= NULL
2980 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2982 if (internal_relocs
!= NULL
2983 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2984 free (internal_relocs
);
2988 /* Set the sizes of the dynamic sections. */
2991 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
2992 struct bfd_link_info
*info
)
2994 struct elf_x86_64_link_hash_table
*htab
;
2999 const struct elf_backend_data
*bed
;
3001 htab
= elf_x86_64_hash_table (info
);
3004 bed
= get_elf_backend_data (output_bfd
);
3006 dynobj
= htab
->elf
.dynobj
;
3010 if (htab
->elf
.dynamic_sections_created
)
3012 /* Set the contents of the .interp section to the interpreter. */
3013 if (info
->executable
)
3015 s
= bfd_get_linker_section (dynobj
, ".interp");
3018 s
->size
= htab
->dynamic_interpreter_size
;
3019 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
3023 /* Set up .got offsets for local syms, and space for local dynamic
3025 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3027 bfd_signed_vma
*local_got
;
3028 bfd_signed_vma
*end_local_got
;
3029 char *local_tls_type
;
3030 bfd_vma
*local_tlsdesc_gotent
;
3031 bfd_size_type locsymcount
;
3032 Elf_Internal_Shdr
*symtab_hdr
;
3035 if (! is_x86_64_elf (ibfd
))
3038 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3040 struct elf_dyn_relocs
*p
;
3042 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
3045 for (p
= (struct elf_dyn_relocs
*)
3046 (elf_section_data (s
)->local_dynrel
);
3050 if (!bfd_is_abs_section (p
->sec
)
3051 && bfd_is_abs_section (p
->sec
->output_section
))
3053 /* Input section has been discarded, either because
3054 it is a copy of a linkonce section or due to
3055 linker script /DISCARD/, so we'll be discarding
3058 else if (p
->count
!= 0)
3060 srel
= elf_section_data (p
->sec
)->sreloc
;
3061 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3062 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3063 && (info
->flags
& DF_TEXTREL
) == 0)
3065 info
->flags
|= DF_TEXTREL
;
3066 if (info
->warn_shared_textrel
&& info
->shared
)
3067 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
3068 p
->sec
->owner
, p
->sec
);
3074 local_got
= elf_local_got_refcounts (ibfd
);
3078 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3079 locsymcount
= symtab_hdr
->sh_info
;
3080 end_local_got
= local_got
+ locsymcount
;
3081 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
3082 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
3084 srel
= htab
->elf
.srelgot
;
3085 for (; local_got
< end_local_got
;
3086 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3088 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3091 if (GOT_TLS_GDESC_P (*local_tls_type
))
3093 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3094 - elf_x86_64_compute_jump_table_size (htab
);
3095 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3096 *local_got
= (bfd_vma
) -2;
3098 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3099 || GOT_TLS_GD_P (*local_tls_type
))
3101 *local_got
= s
->size
;
3102 s
->size
+= GOT_ENTRY_SIZE
;
3103 if (GOT_TLS_GD_P (*local_tls_type
))
3104 s
->size
+= GOT_ENTRY_SIZE
;
3107 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3108 || *local_tls_type
== GOT_TLS_IE
)
3110 if (GOT_TLS_GDESC_P (*local_tls_type
))
3112 htab
->elf
.srelplt
->size
3113 += bed
->s
->sizeof_rela
;
3114 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3116 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3117 || GOT_TLS_GD_P (*local_tls_type
))
3118 srel
->size
+= bed
->s
->sizeof_rela
;
3122 *local_got
= (bfd_vma
) -1;
3126 if (htab
->tls_ld_got
.refcount
> 0)
3128 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3130 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
3131 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
3132 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3135 htab
->tls_ld_got
.offset
= -1;
3137 /* Allocate global sym .plt and .got entries, and space for global
3138 sym dynamic relocs. */
3139 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
3142 /* Allocate .plt and .got entries, and space for local symbols. */
3143 htab_traverse (htab
->loc_hash_table
,
3144 elf_x86_64_allocate_local_dynrelocs
,
3147 /* For every jump slot reserved in the sgotplt, reloc_count is
3148 incremented. However, when we reserve space for TLS descriptors,
3149 it's not incremented, so in order to compute the space reserved
3150 for them, it suffices to multiply the reloc count by the jump
3153 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3154 so that R_X86_64_IRELATIVE entries come last. */
3155 if (htab
->elf
.srelplt
)
3157 htab
->sgotplt_jump_table_size
3158 = elf_x86_64_compute_jump_table_size (htab
);
3159 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3161 else if (htab
->elf
.irelplt
)
3162 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3164 if (htab
->tlsdesc_plt
)
3166 /* If we're not using lazy TLS relocations, don't generate the
3167 PLT and GOT entries they require. */
3168 if ((info
->flags
& DF_BIND_NOW
))
3169 htab
->tlsdesc_plt
= 0;
3172 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
3173 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
3174 /* Reserve room for the initial entry.
3175 FIXME: we could probably do away with it in this case. */
3176 if (htab
->elf
.splt
->size
== 0)
3177 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3178 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
3179 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3183 if (htab
->elf
.sgotplt
)
3185 /* Don't allocate .got.plt section if there are no GOT nor PLT
3186 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3187 if ((htab
->elf
.hgot
== NULL
3188 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3189 && (htab
->elf
.sgotplt
->size
3190 == get_elf_backend_data (output_bfd
)->got_header_size
)
3191 && (htab
->elf
.splt
== NULL
3192 || htab
->elf
.splt
->size
== 0)
3193 && (htab
->elf
.sgot
== NULL
3194 || htab
->elf
.sgot
->size
== 0)
3195 && (htab
->elf
.iplt
== NULL
3196 || htab
->elf
.iplt
->size
== 0)
3197 && (htab
->elf
.igotplt
== NULL
3198 || htab
->elf
.igotplt
->size
== 0))
3199 htab
->elf
.sgotplt
->size
= 0;
3202 if (htab
->plt_eh_frame
!= NULL
3203 && htab
->elf
.splt
!= NULL
3204 && htab
->elf
.splt
->size
!= 0
3205 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3206 && _bfd_elf_eh_frame_present (info
))
3208 const struct elf_x86_64_backend_data
*arch_data
3209 = get_elf_x86_64_arch_data (bed
);
3210 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
3213 /* We now have determined the sizes of the various dynamic sections.
3214 Allocate memory for them. */
3216 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3218 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3221 if (s
== htab
->elf
.splt
3222 || s
== htab
->elf
.sgot
3223 || s
== htab
->elf
.sgotplt
3224 || s
== htab
->elf
.iplt
3225 || s
== htab
->elf
.igotplt
3226 || s
== htab
->plt_bnd
3227 || s
== htab
->plt_got
3228 || s
== htab
->plt_eh_frame
3229 || s
== htab
->sdynbss
)
3231 /* Strip this section if we don't need it; see the
3234 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
3236 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3239 /* We use the reloc_count field as a counter if we need
3240 to copy relocs into the output file. */
3241 if (s
!= htab
->elf
.srelplt
)
3246 /* It's not one of our sections, so don't allocate space. */
3252 /* If we don't need this section, strip it from the
3253 output file. This is mostly to handle .rela.bss and
3254 .rela.plt. We must create both sections in
3255 create_dynamic_sections, because they must be created
3256 before the linker maps input sections to output
3257 sections. The linker does that before
3258 adjust_dynamic_symbol is called, and it is that
3259 function which decides whether anything needs to go
3260 into these sections. */
3262 s
->flags
|= SEC_EXCLUDE
;
3266 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3269 /* Allocate memory for the section contents. We use bfd_zalloc
3270 here in case unused entries are not reclaimed before the
3271 section's contents are written out. This should not happen,
3272 but this way if it does, we get a R_X86_64_NONE reloc instead
3274 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3275 if (s
->contents
== NULL
)
3279 if (htab
->plt_eh_frame
!= NULL
3280 && htab
->plt_eh_frame
->contents
!= NULL
)
3282 const struct elf_x86_64_backend_data
*arch_data
3283 = get_elf_x86_64_arch_data (bed
);
3285 memcpy (htab
->plt_eh_frame
->contents
,
3286 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3287 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3288 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3291 if (htab
->elf
.dynamic_sections_created
)
3293 /* Add some entries to the .dynamic section. We fill in the
3294 values later, in elf_x86_64_finish_dynamic_sections, but we
3295 must add the entries now so that we get the correct size for
3296 the .dynamic section. The DT_DEBUG entry is filled in by the
3297 dynamic linker and used by the debugger. */
3298 #define add_dynamic_entry(TAG, VAL) \
3299 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3301 if (info
->executable
)
3303 if (!add_dynamic_entry (DT_DEBUG
, 0))
3307 if (htab
->elf
.splt
->size
!= 0)
3309 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3310 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3311 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3312 || !add_dynamic_entry (DT_JMPREL
, 0))
3315 if (htab
->tlsdesc_plt
3316 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3317 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3323 if (!add_dynamic_entry (DT_RELA
, 0)
3324 || !add_dynamic_entry (DT_RELASZ
, 0)
3325 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3328 /* If any dynamic relocs apply to a read-only section,
3329 then we need a DT_TEXTREL entry. */
3330 if ((info
->flags
& DF_TEXTREL
) == 0)
3331 elf_link_hash_traverse (&htab
->elf
,
3332 elf_x86_64_readonly_dynrelocs
,
3335 if ((info
->flags
& DF_TEXTREL
) != 0)
3337 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3342 #undef add_dynamic_entry
3348 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3349 struct bfd_link_info
*info
)
3351 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3355 struct elf_link_hash_entry
*tlsbase
;
3357 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3358 "_TLS_MODULE_BASE_",
3359 FALSE
, FALSE
, FALSE
);
3361 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3363 struct elf_x86_64_link_hash_table
*htab
;
3364 struct bfd_link_hash_entry
*bh
= NULL
;
3365 const struct elf_backend_data
*bed
3366 = get_elf_backend_data (output_bfd
);
3368 htab
= elf_x86_64_hash_table (info
);
3372 if (!(_bfd_generic_link_add_one_symbol
3373 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3374 tls_sec
, 0, NULL
, FALSE
,
3375 bed
->collect
, &bh
)))
3378 htab
->tls_module_base
= bh
;
3380 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3381 tlsbase
->def_regular
= 1;
3382 tlsbase
->other
= STV_HIDDEN
;
3383 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3390 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3391 executables. Rather than setting it to the beginning of the TLS
3392 section, we have to set it to the end. This function may be called
3393 multiple times, it is idempotent. */
3396 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3398 struct elf_x86_64_link_hash_table
*htab
;
3399 struct bfd_link_hash_entry
*base
;
3401 if (!info
->executable
)
3404 htab
= elf_x86_64_hash_table (info
);
3408 base
= htab
->tls_module_base
;
3412 base
->u
.def
.value
= htab
->elf
.tls_size
;
3415 /* Return the base VMA address which should be subtracted from real addresses
3416 when resolving @dtpoff relocation.
3417 This is PT_TLS segment p_vaddr. */
3420 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3422 /* If tls_sec is NULL, we should have signalled an error already. */
3423 if (elf_hash_table (info
)->tls_sec
== NULL
)
3425 return elf_hash_table (info
)->tls_sec
->vma
;
3428 /* Return the relocation value for @tpoff relocation
3429 if STT_TLS virtual address is ADDRESS. */
3432 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3434 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3435 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3436 bfd_vma static_tls_size
;
3438 /* If tls_segment is NULL, we should have signalled an error already. */
3439 if (htab
->tls_sec
== NULL
)
3442 /* Consider special static TLS alignment requirements. */
3443 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3444 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3447 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3451 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3453 /* Opcode Instruction
3456 0x0f 0x8x conditional jump */
3458 && (contents
[offset
- 1] == 0xe8
3459 || contents
[offset
- 1] == 0xe9))
3461 && contents
[offset
- 2] == 0x0f
3462 && (contents
[offset
- 1] & 0xf0) == 0x80));
3465 /* Relocate an x86_64 ELF section. */
3468 elf_x86_64_relocate_section (bfd
*output_bfd
,
3469 struct bfd_link_info
*info
,
3471 asection
*input_section
,
3473 Elf_Internal_Rela
*relocs
,
3474 Elf_Internal_Sym
*local_syms
,
3475 asection
**local_sections
)
3477 struct elf_x86_64_link_hash_table
*htab
;
3478 Elf_Internal_Shdr
*symtab_hdr
;
3479 struct elf_link_hash_entry
**sym_hashes
;
3480 bfd_vma
*local_got_offsets
;
3481 bfd_vma
*local_tlsdesc_gotents
;
3482 Elf_Internal_Rela
*rel
;
3483 Elf_Internal_Rela
*relend
;
3484 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3486 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3488 htab
= elf_x86_64_hash_table (info
);
3491 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3492 sym_hashes
= elf_sym_hashes (input_bfd
);
3493 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3494 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3496 elf_x86_64_set_tls_module_base (info
);
3499 relend
= relocs
+ input_section
->reloc_count
;
3500 for (; rel
< relend
; rel
++)
3502 unsigned int r_type
;
3503 reloc_howto_type
*howto
;
3504 unsigned long r_symndx
;
3505 struct elf_link_hash_entry
*h
;
3506 struct elf_x86_64_link_hash_entry
*eh
;
3507 Elf_Internal_Sym
*sym
;
3509 bfd_vma off
, offplt
, plt_offset
;
3511 bfd_boolean unresolved_reloc
;
3512 bfd_reloc_status_type r
;
3514 asection
*base_got
, *resolved_plt
;
3517 r_type
= ELF32_R_TYPE (rel
->r_info
);
3518 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3519 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3522 if (r_type
>= (int) R_X86_64_standard
)
3524 (*_bfd_error_handler
)
3525 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3526 input_bfd
, input_section
, r_type
);
3527 bfd_set_error (bfd_error_bad_value
);
3531 if (r_type
!= (int) R_X86_64_32
3532 || ABI_64_P (output_bfd
))
3533 howto
= x86_64_elf_howto_table
+ r_type
;
3535 howto
= (x86_64_elf_howto_table
3536 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3537 r_symndx
= htab
->r_sym (rel
->r_info
);
3541 unresolved_reloc
= FALSE
;
3542 if (r_symndx
< symtab_hdr
->sh_info
)
3544 sym
= local_syms
+ r_symndx
;
3545 sec
= local_sections
[r_symndx
];
3547 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3549 st_size
= sym
->st_size
;
3551 /* Relocate against local STT_GNU_IFUNC symbol. */
3552 if (!info
->relocatable
3553 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3555 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3560 /* Set STT_GNU_IFUNC symbol value. */
3561 h
->root
.u
.def
.value
= sym
->st_value
;
3562 h
->root
.u
.def
.section
= sec
;
3567 bfd_boolean warned ATTRIBUTE_UNUSED
;
3568 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3570 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3571 r_symndx
, symtab_hdr
, sym_hashes
,
3573 unresolved_reloc
, warned
, ignored
);
3577 if (sec
!= NULL
&& discarded_section (sec
))
3578 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3579 rel
, 1, relend
, howto
, 0, contents
);
3581 if (info
->relocatable
)
3584 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3586 if (r_type
== R_X86_64_64
)
3588 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3589 zero-extend it to 64bit if addend is zero. */
3590 r_type
= R_X86_64_32
;
3591 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3593 else if (r_type
== R_X86_64_SIZE64
)
3595 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3596 zero-extend it to 64bit if addend is zero. */
3597 r_type
= R_X86_64_SIZE32
;
3598 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3602 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3604 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3605 it here if it is defined in a non-shared object. */
3607 && h
->type
== STT_GNU_IFUNC
3613 if ((input_section
->flags
& SEC_ALLOC
) == 0
3614 || h
->plt
.offset
== (bfd_vma
) -1)
3617 /* STT_GNU_IFUNC symbol must go through PLT. */
3618 if (htab
->elf
.splt
!= NULL
)
3620 if (htab
->plt_bnd
!= NULL
)
3622 resolved_plt
= htab
->plt_bnd
;
3623 plt_offset
= eh
->plt_bnd
.offset
;
3627 resolved_plt
= htab
->elf
.splt
;
3628 plt_offset
= h
->plt
.offset
;
3633 resolved_plt
= htab
->elf
.iplt
;
3634 plt_offset
= h
->plt
.offset
;
3637 relocation
= (resolved_plt
->output_section
->vma
3638 + resolved_plt
->output_offset
+ plt_offset
);
3643 if (h
->root
.root
.string
)
3644 name
= h
->root
.root
.string
;
3646 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3648 (*_bfd_error_handler
)
3649 (_("%B: relocation %s against STT_GNU_IFUNC "
3650 "symbol `%s' isn't handled by %s"), input_bfd
,
3651 x86_64_elf_howto_table
[r_type
].name
,
3652 name
, __FUNCTION__
);
3653 bfd_set_error (bfd_error_bad_value
);
3662 if (ABI_64_P (output_bfd
))
3666 if (rel
->r_addend
!= 0)
3668 if (h
->root
.root
.string
)
3669 name
= h
->root
.root
.string
;
3671 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3673 (*_bfd_error_handler
)
3674 (_("%B: relocation %s against STT_GNU_IFUNC "
3675 "symbol `%s' has non-zero addend: %d"),
3676 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3677 name
, rel
->r_addend
);
3678 bfd_set_error (bfd_error_bad_value
);
3682 /* Generate dynamic relcoation only when there is a
3683 non-GOT reference in a shared object. */
3684 if (info
->shared
&& h
->non_got_ref
)
3686 Elf_Internal_Rela outrel
;
3689 /* Need a dynamic relocation to get the real function
3691 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3695 if (outrel
.r_offset
== (bfd_vma
) -1
3696 || outrel
.r_offset
== (bfd_vma
) -2)
3699 outrel
.r_offset
+= (input_section
->output_section
->vma
3700 + input_section
->output_offset
);
3702 if (h
->dynindx
== -1
3704 || info
->executable
)
3706 /* This symbol is resolved locally. */
3707 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3708 outrel
.r_addend
= (h
->root
.u
.def
.value
3709 + h
->root
.u
.def
.section
->output_section
->vma
3710 + h
->root
.u
.def
.section
->output_offset
);
3714 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3715 outrel
.r_addend
= 0;
3718 sreloc
= htab
->elf
.irelifunc
;
3719 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3721 /* If this reloc is against an external symbol, we
3722 do not want to fiddle with the addend. Otherwise,
3723 we need to include the symbol value so that it
3724 becomes an addend for the dynamic reloc. For an
3725 internal symbol, we have updated addend. */
3730 case R_X86_64_PC32_BND
:
3732 case R_X86_64_PLT32
:
3733 case R_X86_64_PLT32_BND
:
3736 case R_X86_64_GOTPCREL
:
3737 case R_X86_64_GOTPCREL64
:
3738 base_got
= htab
->elf
.sgot
;
3739 off
= h
->got
.offset
;
3741 if (base_got
== NULL
)
3744 if (off
== (bfd_vma
) -1)
3746 /* We can't use h->got.offset here to save state, or
3747 even just remember the offset, as finish_dynamic_symbol
3748 would use that as offset into .got. */
3750 if (htab
->elf
.splt
!= NULL
)
3752 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3753 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3754 base_got
= htab
->elf
.sgotplt
;
3758 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3759 off
= plt_index
* GOT_ENTRY_SIZE
;
3760 base_got
= htab
->elf
.igotplt
;
3763 if (h
->dynindx
== -1
3767 /* This references the local defitionion. We must
3768 initialize this entry in the global offset table.
3769 Since the offset must always be a multiple of 8,
3770 we use the least significant bit to record
3771 whether we have initialized it already.
3773 When doing a dynamic link, we create a .rela.got
3774 relocation entry to initialize the value. This
3775 is done in the finish_dynamic_symbol routine. */
3780 bfd_put_64 (output_bfd
, relocation
,
3781 base_got
->contents
+ off
);
3782 /* Note that this is harmless for the GOTPLT64
3783 case, as -1 | 1 still is -1. */
3789 relocation
= (base_got
->output_section
->vma
3790 + base_got
->output_offset
+ off
);
3796 /* When generating a shared object, the relocations handled here are
3797 copied into the output file to be resolved at run time. */
3800 case R_X86_64_GOT32
:
3801 case R_X86_64_GOT64
:
3802 /* Relocation is to the entry for this symbol in the global
3804 case R_X86_64_GOTPCREL
:
3805 case R_X86_64_GOTPCREL64
:
3806 /* Use global offset table entry as symbol value. */
3807 case R_X86_64_GOTPLT64
:
3808 /* This is obsolete and treated the the same as GOT64. */
3809 base_got
= htab
->elf
.sgot
;
3811 if (htab
->elf
.sgot
== NULL
)
3818 off
= h
->got
.offset
;
3820 && h
->plt
.offset
!= (bfd_vma
)-1
3821 && off
== (bfd_vma
)-1)
3823 /* We can't use h->got.offset here to save
3824 state, or even just remember the offset, as
3825 finish_dynamic_symbol would use that as offset into
3827 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3828 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3829 base_got
= htab
->elf
.sgotplt
;
3832 dyn
= htab
->elf
.dynamic_sections_created
;
3834 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3836 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3837 || (ELF_ST_VISIBILITY (h
->other
)
3838 && h
->root
.type
== bfd_link_hash_undefweak
))
3840 /* This is actually a static link, or it is a -Bsymbolic
3841 link and the symbol is defined locally, or the symbol
3842 was forced to be local because of a version file. We
3843 must initialize this entry in the global offset table.
3844 Since the offset must always be a multiple of 8, we
3845 use the least significant bit to record whether we
3846 have initialized it already.
3848 When doing a dynamic link, we create a .rela.got
3849 relocation entry to initialize the value. This is
3850 done in the finish_dynamic_symbol routine. */
3855 bfd_put_64 (output_bfd
, relocation
,
3856 base_got
->contents
+ off
);
3857 /* Note that this is harmless for the GOTPLT64 case,
3858 as -1 | 1 still is -1. */
3863 unresolved_reloc
= FALSE
;
3867 if (local_got_offsets
== NULL
)
3870 off
= local_got_offsets
[r_symndx
];
3872 /* The offset must always be a multiple of 8. We use
3873 the least significant bit to record whether we have
3874 already generated the necessary reloc. */
3879 bfd_put_64 (output_bfd
, relocation
,
3880 base_got
->contents
+ off
);
3885 Elf_Internal_Rela outrel
;
3887 /* We need to generate a R_X86_64_RELATIVE reloc
3888 for the dynamic linker. */
3889 s
= htab
->elf
.srelgot
;
3893 outrel
.r_offset
= (base_got
->output_section
->vma
3894 + base_got
->output_offset
3896 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3897 outrel
.r_addend
= relocation
;
3898 elf_append_rela (output_bfd
, s
, &outrel
);
3901 local_got_offsets
[r_symndx
] |= 1;
3905 if (off
>= (bfd_vma
) -2)
3908 relocation
= base_got
->output_section
->vma
3909 + base_got
->output_offset
+ off
;
3910 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
3911 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3912 - htab
->elf
.sgotplt
->output_offset
;
3916 case R_X86_64_GOTOFF64
:
3917 /* Relocation is relative to the start of the global offset
3920 /* Check to make sure it isn't a protected function symbol
3921 for shared library since it may not be local when used
3922 as function address. */
3923 if (!info
->executable
3925 && !SYMBOLIC_BIND (info
, h
)
3927 && h
->type
== STT_FUNC
3928 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3930 (*_bfd_error_handler
)
3931 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3932 input_bfd
, h
->root
.root
.string
);
3933 bfd_set_error (bfd_error_bad_value
);
3937 /* Note that sgot is not involved in this
3938 calculation. We always want the start of .got.plt. If we
3939 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3940 permitted by the ABI, we might have to change this
3942 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3943 + htab
->elf
.sgotplt
->output_offset
;
3946 case R_X86_64_GOTPC32
:
3947 case R_X86_64_GOTPC64
:
3948 /* Use global offset table as symbol value. */
3949 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3950 + htab
->elf
.sgotplt
->output_offset
;
3951 unresolved_reloc
= FALSE
;
3954 case R_X86_64_PLTOFF64
:
3955 /* Relocation is PLT entry relative to GOT. For local
3956 symbols it's the symbol itself relative to GOT. */
3958 /* See PLT32 handling. */
3959 && h
->plt
.offset
!= (bfd_vma
) -1
3960 && htab
->elf
.splt
!= NULL
)
3962 if (htab
->plt_bnd
!= NULL
)
3964 resolved_plt
= htab
->plt_bnd
;
3965 plt_offset
= eh
->plt_bnd
.offset
;
3969 resolved_plt
= htab
->elf
.splt
;
3970 plt_offset
= h
->plt
.offset
;
3973 relocation
= (resolved_plt
->output_section
->vma
3974 + resolved_plt
->output_offset
3976 unresolved_reloc
= FALSE
;
3979 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3980 + htab
->elf
.sgotplt
->output_offset
;
3983 case R_X86_64_PLT32
:
3984 case R_X86_64_PLT32_BND
:
3985 /* Relocation is to the entry for this symbol in the
3986 procedure linkage table. */
3988 /* Resolve a PLT32 reloc against a local symbol directly,
3989 without using the procedure linkage table. */
3993 if ((h
->plt
.offset
== (bfd_vma
) -1
3994 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3995 || htab
->elf
.splt
== NULL
)
3997 /* We didn't make a PLT entry for this symbol. This
3998 happens when statically linking PIC code, or when
3999 using -Bsymbolic. */
4003 if (h
->plt
.offset
!= (bfd_vma
) -1)
4005 if (htab
->plt_bnd
!= NULL
)
4007 resolved_plt
= htab
->plt_bnd
;
4008 plt_offset
= eh
->plt_bnd
.offset
;
4012 resolved_plt
= htab
->elf
.splt
;
4013 plt_offset
= h
->plt
.offset
;
4018 /* Use the GOT PLT. */
4019 resolved_plt
= htab
->plt_got
;
4020 plt_offset
= eh
->plt_got
.offset
;
4023 relocation
= (resolved_plt
->output_section
->vma
4024 + resolved_plt
->output_offset
4026 unresolved_reloc
= FALSE
;
4029 case R_X86_64_SIZE32
:
4030 case R_X86_64_SIZE64
:
4031 /* Set to symbol size. */
4032 relocation
= st_size
;
4038 case R_X86_64_PC32_BND
:
4040 && (input_section
->flags
& SEC_ALLOC
) != 0
4041 && (input_section
->flags
& SEC_READONLY
) != 0
4044 bfd_boolean fail
= FALSE
;
4046 = ((r_type
== R_X86_64_PC32
4047 || r_type
== R_X86_64_PC32_BND
)
4048 && is_32bit_relative_branch (contents
, rel
->r_offset
));
4050 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
4052 /* Symbol is referenced locally. Make sure it is
4053 defined locally or for a branch. */
4054 fail
= !h
->def_regular
&& !branch
;
4056 else if (!h
->needs_copy
)
4058 /* Symbol doesn't need copy reloc and isn't referenced
4059 locally. We only allow branch to symbol with
4060 non-default visibility. */
4062 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
4069 const char *pic
= "";
4071 switch (ELF_ST_VISIBILITY (h
->other
))
4074 v
= _("hidden symbol");
4077 v
= _("internal symbol");
4080 v
= _("protected symbol");
4084 pic
= _("; recompile with -fPIC");
4089 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4091 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4093 (*_bfd_error_handler
) (fmt
, input_bfd
,
4094 x86_64_elf_howto_table
[r_type
].name
,
4095 v
, h
->root
.root
.string
, pic
);
4096 bfd_set_error (bfd_error_bad_value
);
4107 /* FIXME: The ABI says the linker should make sure the value is
4108 the same when it's zeroextended to 64 bit. */
4111 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4114 /* Don't copy a pc-relative relocation into the output file
4115 if the symbol needs copy reloc. */
4119 && IS_X86_64_PCREL_TYPE (r_type
))
4121 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4122 || h
->root
.type
!= bfd_link_hash_undefweak
)
4123 && ((! IS_X86_64_PCREL_TYPE (r_type
)
4124 && r_type
!= R_X86_64_SIZE32
4125 && r_type
!= R_X86_64_SIZE64
)
4126 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
4127 || (ELIMINATE_COPY_RELOCS
4134 || h
->root
.type
== bfd_link_hash_undefweak
4135 || h
->root
.type
== bfd_link_hash_undefined
)))
4137 Elf_Internal_Rela outrel
;
4138 bfd_boolean skip
, relocate
;
4141 /* When generating a shared object, these relocations
4142 are copied into the output file to be resolved at run
4148 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4150 if (outrel
.r_offset
== (bfd_vma
) -1)
4152 else if (outrel
.r_offset
== (bfd_vma
) -2)
4153 skip
= TRUE
, relocate
= TRUE
;
4155 outrel
.r_offset
+= (input_section
->output_section
->vma
4156 + input_section
->output_offset
);
4159 memset (&outrel
, 0, sizeof outrel
);
4161 /* h->dynindx may be -1 if this symbol was marked to
4165 && (IS_X86_64_PCREL_TYPE (r_type
)
4167 || ! SYMBOLIC_BIND (info
, h
)
4168 || ! h
->def_regular
))
4170 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
4171 outrel
.r_addend
= rel
->r_addend
;
4175 /* This symbol is local, or marked to become local. */
4176 if (r_type
== htab
->pointer_r_type
)
4179 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4180 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4182 else if (r_type
== R_X86_64_64
4183 && !ABI_64_P (output_bfd
))
4186 outrel
.r_info
= htab
->r_info (0,
4187 R_X86_64_RELATIVE64
);
4188 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4189 /* Check addend overflow. */
4190 if ((outrel
.r_addend
& 0x80000000)
4191 != (rel
->r_addend
& 0x80000000))
4194 int addend
= rel
->r_addend
;
4195 if (h
&& h
->root
.root
.string
)
4196 name
= h
->root
.root
.string
;
4198 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4201 (*_bfd_error_handler
)
4202 (_("%B: addend -0x%x in relocation %s against "
4203 "symbol `%s' at 0x%lx in section `%A' is "
4205 input_bfd
, input_section
, addend
,
4206 x86_64_elf_howto_table
[r_type
].name
,
4207 name
, (unsigned long) rel
->r_offset
);
4209 (*_bfd_error_handler
)
4210 (_("%B: addend 0x%x in relocation %s against "
4211 "symbol `%s' at 0x%lx in section `%A' is "
4213 input_bfd
, input_section
, addend
,
4214 x86_64_elf_howto_table
[r_type
].name
,
4215 name
, (unsigned long) rel
->r_offset
);
4216 bfd_set_error (bfd_error_bad_value
);
4224 if (bfd_is_abs_section (sec
))
4226 else if (sec
== NULL
|| sec
->owner
== NULL
)
4228 bfd_set_error (bfd_error_bad_value
);
4235 /* We are turning this relocation into one
4236 against a section symbol. It would be
4237 proper to subtract the symbol's value,
4238 osec->vma, from the emitted reloc addend,
4239 but ld.so expects buggy relocs. */
4240 osec
= sec
->output_section
;
4241 sindx
= elf_section_data (osec
)->dynindx
;
4244 asection
*oi
= htab
->elf
.text_index_section
;
4245 sindx
= elf_section_data (oi
)->dynindx
;
4247 BFD_ASSERT (sindx
!= 0);
4250 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
4251 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4255 sreloc
= elf_section_data (input_section
)->sreloc
;
4257 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4259 r
= bfd_reloc_notsupported
;
4260 goto check_relocation_error
;
4263 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4265 /* If this reloc is against an external symbol, we do
4266 not want to fiddle with the addend. Otherwise, we
4267 need to include the symbol value so that it becomes
4268 an addend for the dynamic reloc. */
4275 case R_X86_64_TLSGD
:
4276 case R_X86_64_GOTPC32_TLSDESC
:
4277 case R_X86_64_TLSDESC_CALL
:
4278 case R_X86_64_GOTTPOFF
:
4279 tls_type
= GOT_UNKNOWN
;
4280 if (h
== NULL
&& local_got_offsets
)
4281 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
4283 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
4285 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4286 input_section
, contents
,
4287 symtab_hdr
, sym_hashes
,
4288 &r_type
, tls_type
, rel
,
4289 relend
, h
, r_symndx
))
4292 if (r_type
== R_X86_64_TPOFF32
)
4294 bfd_vma roff
= rel
->r_offset
;
4296 BFD_ASSERT (! unresolved_reloc
);
4298 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4300 /* GD->LE transition. For 64bit, change
4301 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4302 .word 0x6666; rex64; call __tls_get_addr
4305 leaq foo@tpoff(%rax), %rax
4307 leaq foo@tlsgd(%rip), %rdi
4308 .word 0x6666; rex64; call __tls_get_addr
4311 leaq foo@tpoff(%rax), %rax
4312 For largepic, change:
4313 leaq foo@tlsgd(%rip), %rdi
4314 movabsq $__tls_get_addr@pltoff, %rax
4319 leaq foo@tpoff(%rax), %rax
4320 nopw 0x0(%rax,%rax,1) */
4322 if (ABI_64_P (output_bfd
)
4323 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4325 memcpy (contents
+ roff
- 3,
4326 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4327 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4330 else if (ABI_64_P (output_bfd
))
4331 memcpy (contents
+ roff
- 4,
4332 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4335 memcpy (contents
+ roff
- 3,
4336 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4338 bfd_put_32 (output_bfd
,
4339 elf_x86_64_tpoff (info
, relocation
),
4340 contents
+ roff
+ 8 + largepic
);
4341 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4345 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4347 /* GDesc -> LE transition.
4348 It's originally something like:
4349 leaq x@tlsdesc(%rip), %rax
4352 movl $x@tpoff, %rax. */
4354 unsigned int val
, type
;
4356 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4357 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4358 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4359 contents
+ roff
- 3);
4360 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4361 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4362 contents
+ roff
- 1);
4363 bfd_put_32 (output_bfd
,
4364 elf_x86_64_tpoff (info
, relocation
),
4368 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4370 /* GDesc -> LE transition.
4375 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4376 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4379 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4381 /* IE->LE transition:
4382 For 64bit, originally it can be one of:
4383 movq foo@gottpoff(%rip), %reg
4384 addq foo@gottpoff(%rip), %reg
4387 leaq foo(%reg), %reg
4389 For 32bit, originally it can be one of:
4390 movq foo@gottpoff(%rip), %reg
4391 addl foo@gottpoff(%rip), %reg
4394 leal foo(%reg), %reg
4397 unsigned int val
, type
, reg
;
4400 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4403 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4404 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4410 bfd_put_8 (output_bfd
, 0x49,
4411 contents
+ roff
- 3);
4412 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4413 bfd_put_8 (output_bfd
, 0x41,
4414 contents
+ roff
- 3);
4415 bfd_put_8 (output_bfd
, 0xc7,
4416 contents
+ roff
- 2);
4417 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4418 contents
+ roff
- 1);
4422 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4425 bfd_put_8 (output_bfd
, 0x49,
4426 contents
+ roff
- 3);
4427 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4428 bfd_put_8 (output_bfd
, 0x41,
4429 contents
+ roff
- 3);
4430 bfd_put_8 (output_bfd
, 0x81,
4431 contents
+ roff
- 2);
4432 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4433 contents
+ roff
- 1);
4437 /* addq/addl -> leaq/leal */
4439 bfd_put_8 (output_bfd
, 0x4d,
4440 contents
+ roff
- 3);
4441 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4442 bfd_put_8 (output_bfd
, 0x45,
4443 contents
+ roff
- 3);
4444 bfd_put_8 (output_bfd
, 0x8d,
4445 contents
+ roff
- 2);
4446 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4447 contents
+ roff
- 1);
4449 bfd_put_32 (output_bfd
,
4450 elf_x86_64_tpoff (info
, relocation
),
4458 if (htab
->elf
.sgot
== NULL
)
4463 off
= h
->got
.offset
;
4464 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4468 if (local_got_offsets
== NULL
)
4471 off
= local_got_offsets
[r_symndx
];
4472 offplt
= local_tlsdesc_gotents
[r_symndx
];
4479 Elf_Internal_Rela outrel
;
4483 if (htab
->elf
.srelgot
== NULL
)
4486 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4488 if (GOT_TLS_GDESC_P (tls_type
))
4490 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4491 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4492 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4493 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4494 + htab
->elf
.sgotplt
->output_offset
4496 + htab
->sgotplt_jump_table_size
);
4497 sreloc
= htab
->elf
.srelplt
;
4499 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4501 outrel
.r_addend
= 0;
4502 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4505 sreloc
= htab
->elf
.srelgot
;
4507 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4508 + htab
->elf
.sgot
->output_offset
+ off
);
4510 if (GOT_TLS_GD_P (tls_type
))
4511 dr_type
= R_X86_64_DTPMOD64
;
4512 else if (GOT_TLS_GDESC_P (tls_type
))
4515 dr_type
= R_X86_64_TPOFF64
;
4517 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4518 outrel
.r_addend
= 0;
4519 if ((dr_type
== R_X86_64_TPOFF64
4520 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4521 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4522 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4524 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4526 if (GOT_TLS_GD_P (tls_type
))
4530 BFD_ASSERT (! unresolved_reloc
);
4531 bfd_put_64 (output_bfd
,
4532 relocation
- elf_x86_64_dtpoff_base (info
),
4533 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4537 bfd_put_64 (output_bfd
, 0,
4538 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4539 outrel
.r_info
= htab
->r_info (indx
,
4541 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4542 elf_append_rela (output_bfd
, sreloc
,
4551 local_got_offsets
[r_symndx
] |= 1;
4554 if (off
>= (bfd_vma
) -2
4555 && ! GOT_TLS_GDESC_P (tls_type
))
4557 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4559 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4560 || r_type
== R_X86_64_TLSDESC_CALL
)
4561 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4562 + htab
->elf
.sgotplt
->output_offset
4563 + offplt
+ htab
->sgotplt_jump_table_size
;
4565 relocation
= htab
->elf
.sgot
->output_section
->vma
4566 + htab
->elf
.sgot
->output_offset
+ off
;
4567 unresolved_reloc
= FALSE
;
4571 bfd_vma roff
= rel
->r_offset
;
4573 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4575 /* GD->IE transition. For 64bit, change
4576 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4577 .word 0x6666; rex64; call __tls_get_addr@plt
4580 addq foo@gottpoff(%rip), %rax
4582 leaq foo@tlsgd(%rip), %rdi
4583 .word 0x6666; rex64; call __tls_get_addr@plt
4586 addq foo@gottpoff(%rip), %rax
4587 For largepic, change:
4588 leaq foo@tlsgd(%rip), %rdi
4589 movabsq $__tls_get_addr@pltoff, %rax
4594 addq foo@gottpoff(%rax), %rax
4595 nopw 0x0(%rax,%rax,1) */
4597 if (ABI_64_P (output_bfd
)
4598 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4600 memcpy (contents
+ roff
- 3,
4601 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4602 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4605 else if (ABI_64_P (output_bfd
))
4606 memcpy (contents
+ roff
- 4,
4607 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4610 memcpy (contents
+ roff
- 3,
4611 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4614 relocation
= (htab
->elf
.sgot
->output_section
->vma
4615 + htab
->elf
.sgot
->output_offset
+ off
4618 - input_section
->output_section
->vma
4619 - input_section
->output_offset
4621 bfd_put_32 (output_bfd
, relocation
,
4622 contents
+ roff
+ 8 + largepic
);
4623 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4627 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4629 /* GDesc -> IE transition.
4630 It's originally something like:
4631 leaq x@tlsdesc(%rip), %rax
4634 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4636 /* Now modify the instruction as appropriate. To
4637 turn a leaq into a movq in the form we use it, it
4638 suffices to change the second byte from 0x8d to
4640 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4642 bfd_put_32 (output_bfd
,
4643 htab
->elf
.sgot
->output_section
->vma
4644 + htab
->elf
.sgot
->output_offset
+ off
4646 - input_section
->output_section
->vma
4647 - input_section
->output_offset
4652 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4654 /* GDesc -> IE transition.
4661 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4662 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4670 case R_X86_64_TLSLD
:
4671 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4672 input_section
, contents
,
4673 symtab_hdr
, sym_hashes
,
4674 &r_type
, GOT_UNKNOWN
,
4675 rel
, relend
, h
, r_symndx
))
4678 if (r_type
!= R_X86_64_TLSLD
)
4680 /* LD->LE transition:
4681 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4682 For 64bit, we change it into:
4683 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4684 For 32bit, we change it into:
4685 nopl 0x0(%rax); movl %fs:0, %eax.
4686 For largepic, change:
4687 leaq foo@tlsgd(%rip), %rdi
4688 movabsq $__tls_get_addr@pltoff, %rax
4692 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4695 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4696 if (ABI_64_P (output_bfd
)
4697 && contents
[rel
->r_offset
+ 5] == (bfd_byte
) '\xb8')
4698 memcpy (contents
+ rel
->r_offset
- 3,
4699 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4700 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4701 else if (ABI_64_P (output_bfd
))
4702 memcpy (contents
+ rel
->r_offset
- 3,
4703 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4705 memcpy (contents
+ rel
->r_offset
- 3,
4706 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4707 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4712 if (htab
->elf
.sgot
== NULL
)
4715 off
= htab
->tls_ld_got
.offset
;
4720 Elf_Internal_Rela outrel
;
4722 if (htab
->elf
.srelgot
== NULL
)
4725 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4726 + htab
->elf
.sgot
->output_offset
+ off
);
4728 bfd_put_64 (output_bfd
, 0,
4729 htab
->elf
.sgot
->contents
+ off
);
4730 bfd_put_64 (output_bfd
, 0,
4731 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4732 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4733 outrel
.r_addend
= 0;
4734 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4736 htab
->tls_ld_got
.offset
|= 1;
4738 relocation
= htab
->elf
.sgot
->output_section
->vma
4739 + htab
->elf
.sgot
->output_offset
+ off
;
4740 unresolved_reloc
= FALSE
;
4743 case R_X86_64_DTPOFF32
:
4744 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4745 relocation
-= elf_x86_64_dtpoff_base (info
);
4747 relocation
= elf_x86_64_tpoff (info
, relocation
);
4750 case R_X86_64_TPOFF32
:
4751 case R_X86_64_TPOFF64
:
4752 BFD_ASSERT (info
->executable
);
4753 relocation
= elf_x86_64_tpoff (info
, relocation
);
4756 case R_X86_64_DTPOFF64
:
4757 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4758 relocation
-= elf_x86_64_dtpoff_base (info
);
4765 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4766 because such sections are not SEC_ALLOC and thus ld.so will
4767 not process them. */
4768 if (unresolved_reloc
4769 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4771 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4772 rel
->r_offset
) != (bfd_vma
) -1)
4774 (*_bfd_error_handler
)
4775 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4778 (long) rel
->r_offset
,
4780 h
->root
.root
.string
);
4785 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4786 contents
, rel
->r_offset
,
4787 relocation
, rel
->r_addend
);
4789 check_relocation_error
:
4790 if (r
!= bfd_reloc_ok
)
4795 name
= h
->root
.root
.string
;
4798 name
= bfd_elf_string_from_elf_section (input_bfd
,
4799 symtab_hdr
->sh_link
,
4804 name
= bfd_section_name (input_bfd
, sec
);
4807 if (r
== bfd_reloc_overflow
)
4809 if (! ((*info
->callbacks
->reloc_overflow
)
4810 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4811 (bfd_vma
) 0, input_bfd
, input_section
,
4817 (*_bfd_error_handler
)
4818 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4819 input_bfd
, input_section
,
4820 (long) rel
->r_offset
, name
, (int) r
);
4829 /* Finish up dynamic symbol handling. We set the contents of various
4830 dynamic sections here. */
4833 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4834 struct bfd_link_info
*info
,
4835 struct elf_link_hash_entry
*h
,
4836 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4838 struct elf_x86_64_link_hash_table
*htab
;
4839 const struct elf_x86_64_backend_data
*abed
;
4840 bfd_boolean use_plt_bnd
;
4841 struct elf_x86_64_link_hash_entry
*eh
;
4843 htab
= elf_x86_64_hash_table (info
);
4847 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
4848 section only if there is .plt section. */
4849 use_plt_bnd
= htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
;
4851 ? &elf_x86_64_bnd_arch_bed
4852 : get_elf_x86_64_backend_data (output_bfd
));
4854 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
4856 if (h
->plt
.offset
!= (bfd_vma
) -1)
4859 bfd_vma got_offset
, plt_offset
, plt_plt_offset
, plt_got_offset
;
4860 bfd_vma plt_plt_insn_end
, plt_got_insn_size
;
4861 Elf_Internal_Rela rela
;
4863 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
4864 const struct elf_backend_data
*bed
;
4865 bfd_vma plt_got_pcrel_offset
;
4867 /* When building a static executable, use .iplt, .igot.plt and
4868 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4869 if (htab
->elf
.splt
!= NULL
)
4871 plt
= htab
->elf
.splt
;
4872 gotplt
= htab
->elf
.sgotplt
;
4873 relplt
= htab
->elf
.srelplt
;
4877 plt
= htab
->elf
.iplt
;
4878 gotplt
= htab
->elf
.igotplt
;
4879 relplt
= htab
->elf
.irelplt
;
4882 /* This symbol has an entry in the procedure linkage table. Set
4884 if ((h
->dynindx
== -1
4885 && !((h
->forced_local
|| info
->executable
)
4887 && h
->type
== STT_GNU_IFUNC
))
4893 /* Get the index in the procedure linkage table which
4894 corresponds to this symbol. This is the index of this symbol
4895 in all the symbols for which we are making plt entries. The
4896 first entry in the procedure linkage table is reserved.
4898 Get the offset into the .got table of the entry that
4899 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4900 bytes. The first three are reserved for the dynamic linker.
4902 For static executables, we don't reserve anything. */
4904 if (plt
== htab
->elf
.splt
)
4906 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
4907 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4911 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
4912 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4915 plt_plt_insn_end
= abed
->plt_plt_insn_end
;
4916 plt_plt_offset
= abed
->plt_plt_offset
;
4917 plt_got_insn_size
= abed
->plt_got_insn_size
;
4918 plt_got_offset
= abed
->plt_got_offset
;
4921 /* Use the second PLT with BND relocations. */
4922 const bfd_byte
*plt_entry
, *plt2_entry
;
4924 if (eh
->has_bnd_reloc
)
4926 plt_entry
= elf_x86_64_bnd_plt_entry
;
4927 plt2_entry
= elf_x86_64_bnd_plt2_entry
;
4931 plt_entry
= elf_x86_64_legacy_plt_entry
;
4932 plt2_entry
= elf_x86_64_legacy_plt2_entry
;
4934 /* Subtract 1 since there is no BND prefix. */
4935 plt_plt_insn_end
-= 1;
4936 plt_plt_offset
-= 1;
4937 plt_got_insn_size
-= 1;
4938 plt_got_offset
-= 1;
4941 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry
)
4942 == sizeof (elf_x86_64_legacy_plt_entry
));
4944 /* Fill in the entry in the procedure linkage table. */
4945 memcpy (plt
->contents
+ h
->plt
.offset
,
4946 plt_entry
, sizeof (elf_x86_64_legacy_plt_entry
));
4947 /* Fill in the entry in the second PLT. */
4948 memcpy (htab
->plt_bnd
->contents
+ eh
->plt_bnd
.offset
,
4949 plt2_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
4951 resolved_plt
= htab
->plt_bnd
;
4952 plt_offset
= eh
->plt_bnd
.offset
;
4956 /* Fill in the entry in the procedure linkage table. */
4957 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
4958 abed
->plt_entry_size
);
4961 plt_offset
= h
->plt
.offset
;
4964 /* Insert the relocation positions of the plt section. */
4966 /* Put offset the PC-relative instruction referring to the GOT entry,
4967 subtracting the size of that instruction. */
4968 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
4969 + gotplt
->output_offset
4971 - resolved_plt
->output_section
->vma
4972 - resolved_plt
->output_offset
4974 - plt_got_insn_size
);
4976 /* Check PC-relative offset overflow in PLT entry. */
4977 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
4978 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
4979 output_bfd
, h
->root
.root
.string
);
4981 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
4982 resolved_plt
->contents
+ plt_offset
+ plt_got_offset
);
4984 /* Fill in the entry in the global offset table, initially this
4985 points to the second part of the PLT entry. */
4986 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4987 + plt
->output_offset
4988 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
4989 gotplt
->contents
+ got_offset
);
4991 /* Fill in the entry in the .rela.plt section. */
4992 rela
.r_offset
= (gotplt
->output_section
->vma
4993 + gotplt
->output_offset
4995 if (h
->dynindx
== -1
4996 || ((info
->executable
4997 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4999 && h
->type
== STT_GNU_IFUNC
))
5001 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5002 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5003 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
5004 rela
.r_addend
= (h
->root
.u
.def
.value
5005 + h
->root
.u
.def
.section
->output_section
->vma
5006 + h
->root
.u
.def
.section
->output_offset
);
5007 /* R_X86_64_IRELATIVE comes last. */
5008 plt_index
= htab
->next_irelative_index
--;
5012 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
5014 plt_index
= htab
->next_jump_slot_index
++;
5017 /* Don't fill PLT entry for static executables. */
5018 if (plt
== htab
->elf
.splt
)
5020 bfd_vma plt0_offset
= h
->plt
.offset
+ plt_plt_insn_end
;
5022 /* Put relocation index. */
5023 bfd_put_32 (output_bfd
, plt_index
,
5024 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
5026 /* Put offset for jmp .PLT0 and check for overflow. We don't
5027 check relocation index for overflow since branch displacement
5028 will overflow first. */
5029 if (plt0_offset
> 0x80000000)
5030 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5031 output_bfd
, h
->root
.root
.string
);
5032 bfd_put_32 (output_bfd
, - plt0_offset
,
5033 plt
->contents
+ h
->plt
.offset
+ plt_plt_offset
);
5036 bed
= get_elf_backend_data (output_bfd
);
5037 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
5038 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
5040 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5042 bfd_vma got_offset
, plt_offset
, plt_got_offset
, plt_got_insn_size
;
5043 asection
*plt
, *got
;
5044 bfd_boolean got_after_plt
;
5045 int32_t got_pcrel_offset
;
5046 const bfd_byte
*got_plt_entry
;
5048 /* Set the entry in the GOT procedure linkage table. */
5049 plt
= htab
->plt_got
;
5050 got
= htab
->elf
.sgot
;
5051 got_offset
= h
->got
.offset
;
5053 if (got_offset
== (bfd_vma
) -1
5054 || h
->type
== STT_GNU_IFUNC
5059 /* Use the second PLT entry template for the GOT PLT since they
5060 are the identical. */
5061 plt_got_insn_size
= elf_x86_64_bnd_arch_bed
.plt_got_insn_size
;
5062 plt_got_offset
= elf_x86_64_bnd_arch_bed
.plt_got_offset
;
5063 if (eh
->has_bnd_reloc
)
5064 got_plt_entry
= elf_x86_64_bnd_plt2_entry
;
5067 got_plt_entry
= elf_x86_64_legacy_plt2_entry
;
5069 /* Subtract 1 since there is no BND prefix. */
5070 plt_got_insn_size
-= 1;
5071 plt_got_offset
-= 1;
5074 /* Fill in the entry in the GOT procedure linkage table. */
5075 plt_offset
= eh
->plt_got
.offset
;
5076 memcpy (plt
->contents
+ plt_offset
,
5077 got_plt_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5079 /* Put offset the PC-relative instruction referring to the GOT
5080 entry, subtracting the size of that instruction. */
5081 got_pcrel_offset
= (got
->output_section
->vma
5082 + got
->output_offset
5084 - plt
->output_section
->vma
5085 - plt
->output_offset
5087 - plt_got_insn_size
);
5089 /* Check PC-relative offset overflow in GOT PLT entry. */
5090 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
5091 if ((got_after_plt
&& got_pcrel_offset
< 0)
5092 || (!got_after_plt
&& got_pcrel_offset
> 0))
5093 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5094 output_bfd
, h
->root
.root
.string
);
5096 bfd_put_32 (output_bfd
, got_pcrel_offset
,
5097 plt
->contents
+ plt_offset
+ plt_got_offset
);
5101 && (h
->plt
.offset
!= (bfd_vma
) -1
5102 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5104 /* Mark the symbol as undefined, rather than as defined in
5105 the .plt section. Leave the value if there were any
5106 relocations where pointer equality matters (this is a clue
5107 for the dynamic linker, to make function pointer
5108 comparisons work between an application and shared
5109 library), otherwise set it to zero. If a function is only
5110 called from a binary, there is no need to slow down
5111 shared libraries because of that. */
5112 sym
->st_shndx
= SHN_UNDEF
;
5113 if (!h
->pointer_equality_needed
)
5117 if (h
->got
.offset
!= (bfd_vma
) -1
5118 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
5119 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
5121 Elf_Internal_Rela rela
;
5123 /* This symbol has an entry in the global offset table. Set it
5125 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5128 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5129 + htab
->elf
.sgot
->output_offset
5130 + (h
->got
.offset
&~ (bfd_vma
) 1));
5132 /* If this is a static link, or it is a -Bsymbolic link and the
5133 symbol is defined locally or was forced to be local because
5134 of a version file, we just want to emit a RELATIVE reloc.
5135 The entry in the global offset table will already have been
5136 initialized in the relocate_section function. */
5138 && h
->type
== STT_GNU_IFUNC
)
5142 /* Generate R_X86_64_GLOB_DAT. */
5149 if (!h
->pointer_equality_needed
)
5152 /* For non-shared object, we can't use .got.plt, which
5153 contains the real function addres if we need pointer
5154 equality. We load the GOT entry with the PLT entry. */
5155 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5156 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5157 + plt
->output_offset
5159 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5163 else if (info
->shared
5164 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5166 if (!h
->def_regular
)
5168 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5169 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
5170 rela
.r_addend
= (h
->root
.u
.def
.value
5171 + h
->root
.u
.def
.section
->output_section
->vma
5172 + h
->root
.u
.def
.section
->output_offset
);
5176 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5178 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5179 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5180 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
5184 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
5189 Elf_Internal_Rela rela
;
5191 /* This symbol needs a copy reloc. Set it up. */
5193 if (h
->dynindx
== -1
5194 || (h
->root
.type
!= bfd_link_hash_defined
5195 && h
->root
.type
!= bfd_link_hash_defweak
)
5196 || htab
->srelbss
== NULL
)
5199 rela
.r_offset
= (h
->root
.u
.def
.value
5200 + h
->root
.u
.def
.section
->output_section
->vma
5201 + h
->root
.u
.def
.section
->output_offset
);
5202 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
5204 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
5210 /* Finish up local dynamic symbol handling. We set the contents of
5211 various dynamic sections here. */
5214 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
5216 struct elf_link_hash_entry
*h
5217 = (struct elf_link_hash_entry
*) *slot
;
5218 struct bfd_link_info
*info
5219 = (struct bfd_link_info
*) inf
;
5221 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
5225 /* Used to decide how to sort relocs in an optimal manner for the
5226 dynamic linker, before writing them out. */
5228 static enum elf_reloc_type_class
5229 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5230 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5231 const Elf_Internal_Rela
*rela
)
5233 switch ((int) ELF32_R_TYPE (rela
->r_info
))
5235 case R_X86_64_RELATIVE
:
5236 case R_X86_64_RELATIVE64
:
5237 return reloc_class_relative
;
5238 case R_X86_64_JUMP_SLOT
:
5239 return reloc_class_plt
;
5241 return reloc_class_copy
;
5243 return reloc_class_normal
;
5247 /* Finish up the dynamic sections. */
5250 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
5251 struct bfd_link_info
*info
)
5253 struct elf_x86_64_link_hash_table
*htab
;
5256 const struct elf_x86_64_backend_data
*abed
;
5258 htab
= elf_x86_64_hash_table (info
);
5262 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5263 section only if there is .plt section. */
5264 abed
= (htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
5265 ? &elf_x86_64_bnd_arch_bed
5266 : get_elf_x86_64_backend_data (output_bfd
));
5268 dynobj
= htab
->elf
.dynobj
;
5269 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5271 if (htab
->elf
.dynamic_sections_created
)
5273 bfd_byte
*dyncon
, *dynconend
;
5274 const struct elf_backend_data
*bed
;
5275 bfd_size_type sizeof_dyn
;
5277 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5280 bed
= get_elf_backend_data (dynobj
);
5281 sizeof_dyn
= bed
->s
->sizeof_dyn
;
5282 dyncon
= sdyn
->contents
;
5283 dynconend
= sdyn
->contents
+ sdyn
->size
;
5284 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
5286 Elf_Internal_Dyn dyn
;
5289 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
5297 s
= htab
->elf
.sgotplt
;
5298 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5302 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
5306 s
= htab
->elf
.srelplt
->output_section
;
5307 dyn
.d_un
.d_val
= s
->size
;
5311 /* The procedure linkage table relocs (DT_JMPREL) should
5312 not be included in the overall relocs (DT_RELA).
5313 Therefore, we override the DT_RELASZ entry here to
5314 make it not include the JMPREL relocs. Since the
5315 linker script arranges for .rela.plt to follow all
5316 other relocation sections, we don't have to worry
5317 about changing the DT_RELA entry. */
5318 if (htab
->elf
.srelplt
!= NULL
)
5320 s
= htab
->elf
.srelplt
->output_section
;
5321 dyn
.d_un
.d_val
-= s
->size
;
5325 case DT_TLSDESC_PLT
:
5327 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5328 + htab
->tlsdesc_plt
;
5331 case DT_TLSDESC_GOT
:
5333 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5334 + htab
->tlsdesc_got
;
5338 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
5341 /* Fill in the special first entry in the procedure linkage table. */
5342 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5344 /* Fill in the first entry in the procedure linkage table. */
5345 memcpy (htab
->elf
.splt
->contents
,
5346 abed
->plt0_entry
, abed
->plt_entry_size
);
5347 /* Add offset for pushq GOT+8(%rip), since the instruction
5348 uses 6 bytes subtract this value. */
5349 bfd_put_32 (output_bfd
,
5350 (htab
->elf
.sgotplt
->output_section
->vma
5351 + htab
->elf
.sgotplt
->output_offset
5353 - htab
->elf
.splt
->output_section
->vma
5354 - htab
->elf
.splt
->output_offset
5356 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
5357 /* Add offset for the PC-relative instruction accessing GOT+16,
5358 subtracting the offset to the end of that instruction. */
5359 bfd_put_32 (output_bfd
,
5360 (htab
->elf
.sgotplt
->output_section
->vma
5361 + htab
->elf
.sgotplt
->output_offset
5363 - htab
->elf
.splt
->output_section
->vma
5364 - htab
->elf
.splt
->output_offset
5365 - abed
->plt0_got2_insn_end
),
5366 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
5368 elf_section_data (htab
->elf
.splt
->output_section
)
5369 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
5371 if (htab
->tlsdesc_plt
)
5373 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5374 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
5376 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
5377 abed
->plt0_entry
, abed
->plt_entry_size
);
5379 /* Add offset for pushq GOT+8(%rip), since the
5380 instruction uses 6 bytes subtract this value. */
5381 bfd_put_32 (output_bfd
,
5382 (htab
->elf
.sgotplt
->output_section
->vma
5383 + htab
->elf
.sgotplt
->output_offset
5385 - htab
->elf
.splt
->output_section
->vma
5386 - htab
->elf
.splt
->output_offset
5389 htab
->elf
.splt
->contents
5390 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
5391 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5392 where TGD stands for htab->tlsdesc_got, subtracting the offset
5393 to the end of that instruction. */
5394 bfd_put_32 (output_bfd
,
5395 (htab
->elf
.sgot
->output_section
->vma
5396 + htab
->elf
.sgot
->output_offset
5398 - htab
->elf
.splt
->output_section
->vma
5399 - htab
->elf
.splt
->output_offset
5401 - abed
->plt0_got2_insn_end
),
5402 htab
->elf
.splt
->contents
5403 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
5408 if (htab
->plt_bnd
!= NULL
)
5409 elf_section_data (htab
->plt_bnd
->output_section
)
5410 ->this_hdr
.sh_entsize
= sizeof (elf_x86_64_bnd_plt2_entry
);
5412 if (htab
->elf
.sgotplt
)
5414 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5416 (*_bfd_error_handler
)
5417 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5421 /* Fill in the first three entries in the global offset table. */
5422 if (htab
->elf
.sgotplt
->size
> 0)
5424 /* Set the first entry in the global offset table to the address of
5425 the dynamic section. */
5427 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
5429 bfd_put_64 (output_bfd
,
5430 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5431 htab
->elf
.sgotplt
->contents
);
5432 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5433 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
5434 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
5437 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
5441 /* Adjust .eh_frame for .plt section. */
5442 if (htab
->plt_eh_frame
!= NULL
5443 && htab
->plt_eh_frame
->contents
!= NULL
)
5445 if (htab
->elf
.splt
!= NULL
5446 && htab
->elf
.splt
->size
!= 0
5447 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5448 && htab
->elf
.splt
->output_section
!= NULL
5449 && htab
->plt_eh_frame
->output_section
!= NULL
)
5451 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5452 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5453 + htab
->plt_eh_frame
->output_offset
5454 + PLT_FDE_START_OFFSET
;
5455 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5456 htab
->plt_eh_frame
->contents
5457 + PLT_FDE_START_OFFSET
);
5459 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5461 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5463 htab
->plt_eh_frame
->contents
))
5468 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5469 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
5472 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5473 htab_traverse (htab
->loc_hash_table
,
5474 elf_x86_64_finish_local_dynamic_symbol
,
5480 /* Return address in section PLT for the Ith GOTPLT relocation, for
5481 relocation REL or (bfd_vma) -1 if it should not be included. */
5484 elf_x86_64_plt_sym_val (bfd_vma i
, const asection
*plt
,
5488 const struct elf_x86_64_backend_data
*bed
;
5491 /* Only match R_X86_64_JUMP_SLOT and R_X86_64_IRELATIVE. */
5492 if (rel
->howto
->type
!= R_X86_64_JUMP_SLOT
5493 && rel
->howto
->type
!= R_X86_64_IRELATIVE
)
5494 return (bfd_vma
) -1;
5497 bed
= get_elf_x86_64_backend_data (abfd
);
5498 plt_offset
= bed
->plt_entry_size
;
5500 if (elf_elfheader (abfd
)->e_ident
[EI_OSABI
] != ELFOSABI_GNU
)
5501 return plt
->vma
+ (i
+ 1) * plt_offset
;
5503 while (plt_offset
< plt
->size
)
5505 bfd_vma reloc_index
;
5506 bfd_byte reloc_index_raw
[4];
5508 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5510 plt_offset
+ bed
->plt_reloc_offset
,
5511 sizeof (reloc_index_raw
)))
5512 return (bfd_vma
) -1;
5514 reloc_index
= H_GET_32 (abfd
, reloc_index_raw
);
5515 if (reloc_index
== i
)
5516 return plt
->vma
+ plt_offset
;
5517 plt_offset
+= bed
->plt_entry_size
;
5523 /* Return offset in .plt.bnd section for the Ith GOTPLT relocation with
5524 PLT section, or (bfd_vma) -1 if it should not be included. */
5527 elf_x86_64_plt_sym_val_offset_plt_bnd (bfd_vma i
, const asection
*plt
)
5529 const struct elf_x86_64_backend_data
*bed
= &elf_x86_64_bnd_arch_bed
;
5530 bfd
*abfd
= plt
->owner
;
5531 bfd_vma plt_offset
= bed
->plt_entry_size
;
5533 if (elf_elfheader (abfd
)->e_ident
[EI_OSABI
] != ELFOSABI_GNU
)
5534 return i
* sizeof (elf_x86_64_legacy_plt2_entry
);
5536 while (plt_offset
< plt
->size
)
5538 bfd_vma reloc_index
;
5539 bfd_byte reloc_index_raw
[4];
5541 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5543 plt_offset
+ bed
->plt_reloc_offset
,
5544 sizeof (reloc_index_raw
)))
5545 return (bfd_vma
) -1;
5547 reloc_index
= H_GET_32 (abfd
, reloc_index_raw
);
5548 if (reloc_index
== i
)
5550 /* This is the index in .plt section. */
5551 long plt_index
= plt_offset
/ bed
->plt_entry_size
;
5552 /* Return the offset in .plt.bnd section. */
5553 return (plt_index
- 1) * sizeof (elf_x86_64_legacy_plt2_entry
);
5555 plt_offset
+= bed
->plt_entry_size
;
5561 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5565 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
5572 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5575 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5579 Elf_Internal_Shdr
*hdr
;
5581 asection
*plt
, *plt_push
;
5583 plt_push
= bfd_get_section_by_name (abfd
, ".plt");
5584 if (plt_push
== NULL
)
5587 plt
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5588 /* Use the generic ELF version if there is no .plt.bnd section. */
5590 return _bfd_elf_get_synthetic_symtab (abfd
, symcount
, syms
,
5591 dynsymcount
, dynsyms
, ret
);
5595 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
5598 if (dynsymcount
<= 0)
5601 relplt
= bfd_get_section_by_name (abfd
, ".rela.plt");
5605 hdr
= &elf_section_data (relplt
)->this_hdr
;
5606 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
5607 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
5610 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5611 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5614 count
= relplt
->size
/ hdr
->sh_entsize
;
5615 size
= count
* sizeof (asymbol
);
5616 p
= relplt
->relocation
;
5617 for (i
= 0; i
< count
; i
++, p
+= bed
->s
->int_rels_per_ext_rel
)
5619 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
5621 size
+= sizeof ("+0x") - 1 + 8 + 8;
5624 s
= *ret
= (asymbol
*) bfd_malloc (size
);
5628 names
= (char *) (s
+ count
);
5629 p
= relplt
->relocation
;
5631 for (i
= 0; i
< count
; i
++, p
++)
5636 if (p
->howto
->type
!= R_X86_64_JUMP_SLOT
5637 && p
->howto
->type
!= R_X86_64_IRELATIVE
)
5640 offset
= elf_x86_64_plt_sym_val_offset_plt_bnd (i
, plt_push
);
5642 *s
= **p
->sym_ptr_ptr
;
5643 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
5644 we are defining a symbol, ensure one of them is set. */
5645 if ((s
->flags
& BSF_LOCAL
) == 0)
5646 s
->flags
|= BSF_GLOBAL
;
5647 s
->flags
|= BSF_SYNTHETIC
;
5652 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
5653 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
5659 memcpy (names
, "+0x", sizeof ("+0x") - 1);
5660 names
+= sizeof ("+0x") - 1;
5661 bfd_sprintf_vma (abfd
, buf
, p
->addend
);
5662 for (a
= buf
; *a
== '0'; ++a
)
5665 memcpy (names
, a
, len
);
5668 memcpy (names
, "@plt", sizeof ("@plt"));
5669 names
+= sizeof ("@plt");
5676 /* Handle an x86-64 specific section when reading an object file. This
5677 is called when elfcode.h finds a section with an unknown type. */
5680 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
5681 const char *name
, int shindex
)
5683 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
5686 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
5692 /* Hook called by the linker routine which adds symbols from an object
5693 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5697 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5698 struct bfd_link_info
*info
,
5699 Elf_Internal_Sym
*sym
,
5700 const char **namep ATTRIBUTE_UNUSED
,
5701 flagword
*flagsp ATTRIBUTE_UNUSED
,
5707 switch (sym
->st_shndx
)
5709 case SHN_X86_64_LCOMMON
:
5710 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5713 lcomm
= bfd_make_section_with_flags (abfd
,
5717 | SEC_LINKER_CREATED
));
5720 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5723 *valp
= sym
->st_size
;
5727 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5728 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5729 && (abfd
->flags
& DYNAMIC
) == 0
5730 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5731 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5737 /* Given a BFD section, try to locate the corresponding ELF section
5741 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5742 asection
*sec
, int *index_return
)
5744 if (sec
== &_bfd_elf_large_com_section
)
5746 *index_return
= SHN_X86_64_LCOMMON
;
5752 /* Process a symbol. */
5755 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5758 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5760 switch (elfsym
->internal_elf_sym
.st_shndx
)
5762 case SHN_X86_64_LCOMMON
:
5763 asym
->section
= &_bfd_elf_large_com_section
;
5764 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5765 /* Common symbol doesn't set BSF_GLOBAL. */
5766 asym
->flags
&= ~BSF_GLOBAL
;
5772 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5774 return (sym
->st_shndx
== SHN_COMMON
5775 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5779 elf_x86_64_common_section_index (asection
*sec
)
5781 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5784 return SHN_X86_64_LCOMMON
;
5788 elf_x86_64_common_section (asection
*sec
)
5790 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5791 return bfd_com_section_ptr
;
5793 return &_bfd_elf_large_com_section
;
5797 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5798 const Elf_Internal_Sym
*sym
,
5803 const asection
*oldsec
)
5805 /* A normal common symbol and a large common symbol result in a
5806 normal common symbol. We turn the large common symbol into a
5809 && h
->root
.type
== bfd_link_hash_common
5811 && bfd_is_com_section (*psec
)
5814 if (sym
->st_shndx
== SHN_COMMON
5815 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5817 h
->root
.u
.c
.p
->section
5818 = bfd_make_section_old_way (oldbfd
, "COMMON");
5819 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5821 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5822 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5823 *psec
= bfd_com_section_ptr
;
5830 elf_x86_64_additional_program_headers (bfd
*abfd
,
5831 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5836 /* Check to see if we need a large readonly segment. */
5837 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5838 if (s
&& (s
->flags
& SEC_LOAD
))
5841 /* Check to see if we need a large data segment. Since .lbss sections
5842 is placed right after the .bss section, there should be no need for
5843 a large data segment just because of .lbss. */
5844 s
= bfd_get_section_by_name (abfd
, ".ldata");
5845 if (s
&& (s
->flags
& SEC_LOAD
))
5851 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5854 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5856 if (h
->plt
.offset
!= (bfd_vma
) -1
5858 && !h
->pointer_equality_needed
)
5861 return _bfd_elf_hash_symbol (h
);
5864 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5867 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5868 const bfd_target
*output
)
5870 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5871 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5872 && _bfd_elf_relocs_compatible (input
, output
));
5875 static const struct bfd_elf_special_section
5876 elf_x86_64_special_sections
[]=
5878 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5879 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5880 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5881 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5882 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5883 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5884 { NULL
, 0, 0, 0, 0 }
5887 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5888 #define TARGET_LITTLE_NAME "elf64-x86-64"
5889 #define ELF_ARCH bfd_arch_i386
5890 #define ELF_TARGET_ID X86_64_ELF_DATA
5891 #define ELF_MACHINE_CODE EM_X86_64
5892 #define ELF_MAXPAGESIZE 0x200000
5893 #define ELF_MINPAGESIZE 0x1000
5894 #define ELF_COMMONPAGESIZE 0x1000
5896 #define elf_backend_can_gc_sections 1
5897 #define elf_backend_can_refcount 1
5898 #define elf_backend_want_got_plt 1
5899 #define elf_backend_plt_readonly 1
5900 #define elf_backend_want_plt_sym 0
5901 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5902 #define elf_backend_rela_normal 1
5903 #define elf_backend_plt_alignment 4
5905 #define elf_info_to_howto elf_x86_64_info_to_howto
5907 #define bfd_elf64_bfd_link_hash_table_create \
5908 elf_x86_64_link_hash_table_create
5909 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5910 #define bfd_elf64_bfd_reloc_name_lookup \
5911 elf_x86_64_reloc_name_lookup
5913 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5914 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5915 #define elf_backend_check_relocs elf_x86_64_check_relocs
5916 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5917 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5918 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5919 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5920 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5921 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5922 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5923 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5925 #define elf_backend_write_core_note elf_x86_64_write_core_note
5927 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5928 #define elf_backend_relocate_section elf_x86_64_relocate_section
5929 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5930 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5931 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5932 #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
5933 #define elf_backend_object_p elf64_x86_64_elf_object_p
5934 #define bfd_elf64_mkobject elf_x86_64_mkobject
5935 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5937 #define elf_backend_section_from_shdr \
5938 elf_x86_64_section_from_shdr
5940 #define elf_backend_section_from_bfd_section \
5941 elf_x86_64_elf_section_from_bfd_section
5942 #define elf_backend_add_symbol_hook \
5943 elf_x86_64_add_symbol_hook
5944 #define elf_backend_symbol_processing \
5945 elf_x86_64_symbol_processing
5946 #define elf_backend_common_section_index \
5947 elf_x86_64_common_section_index
5948 #define elf_backend_common_section \
5949 elf_x86_64_common_section
5950 #define elf_backend_common_definition \
5951 elf_x86_64_common_definition
5952 #define elf_backend_merge_symbol \
5953 elf_x86_64_merge_symbol
5954 #define elf_backend_special_sections \
5955 elf_x86_64_special_sections
5956 #define elf_backend_additional_program_headers \
5957 elf_x86_64_additional_program_headers
5958 #define elf_backend_hash_symbol \
5959 elf_x86_64_hash_symbol
5961 #include "elf64-target.h"
5963 /* FreeBSD support. */
5965 #undef TARGET_LITTLE_SYM
5966 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5967 #undef TARGET_LITTLE_NAME
5968 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5971 #define ELF_OSABI ELFOSABI_FREEBSD
5974 #define elf64_bed elf64_x86_64_fbsd_bed
5976 #include "elf64-target.h"
5978 /* Solaris 2 support. */
5980 #undef TARGET_LITTLE_SYM
5981 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5982 #undef TARGET_LITTLE_NAME
5983 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5985 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5986 objects won't be recognized. */
5990 #define elf64_bed elf64_x86_64_sol2_bed
5992 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5994 #undef elf_backend_static_tls_alignment
5995 #define elf_backend_static_tls_alignment 16
5997 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5999 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6001 #undef elf_backend_want_plt_sym
6002 #define elf_backend_want_plt_sym 1
6004 #include "elf64-target.h"
6006 #undef bfd_elf64_get_synthetic_symtab
6008 /* Native Client support. */
6011 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
6013 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6014 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
6018 #undef TARGET_LITTLE_SYM
6019 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6020 #undef TARGET_LITTLE_NAME
6021 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6023 #define elf64_bed elf64_x86_64_nacl_bed
6025 #undef ELF_MAXPAGESIZE
6026 #undef ELF_MINPAGESIZE
6027 #undef ELF_COMMONPAGESIZE
6028 #define ELF_MAXPAGESIZE 0x10000
6029 #define ELF_MINPAGESIZE 0x10000
6030 #define ELF_COMMONPAGESIZE 0x10000
6032 /* Restore defaults. */
6034 #undef elf_backend_static_tls_alignment
6035 #undef elf_backend_want_plt_sym
6036 #define elf_backend_want_plt_sym 0
6038 /* NaCl uses substantially different PLT entries for the same effects. */
6040 #undef elf_backend_plt_alignment
6041 #define elf_backend_plt_alignment 5
6042 #define NACL_PLT_ENTRY_SIZE 64
6043 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6045 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
6047 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6048 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6049 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6050 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6051 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6053 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6054 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6056 /* 32 bytes of nop to pad out to the standard size. */
6057 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6058 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6059 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6060 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6061 0x66, /* excess data32 prefix */
6065 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6067 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6068 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6069 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6070 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6072 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6073 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6074 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6076 /* Lazy GOT entries point here (32-byte aligned). */
6077 0x68, /* pushq immediate */
6078 0, 0, 0, 0, /* replaced with index into relocation table. */
6079 0xe9, /* jmp relative */
6080 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6082 /* 22 bytes of nop to pad out to the standard size. */
6083 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6084 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6085 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6088 /* .eh_frame covering the .plt section. */
6090 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
6092 #if (PLT_CIE_LENGTH != 20 \
6093 || PLT_FDE_LENGTH != 36 \
6094 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6095 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6096 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6098 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6099 0, 0, 0, 0, /* CIE ID */
6100 1, /* CIE version */
6101 'z', 'R', 0, /* Augmentation string */
6102 1, /* Code alignment factor */
6103 0x78, /* Data alignment factor */
6104 16, /* Return address column */
6105 1, /* Augmentation size */
6106 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6107 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6108 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6109 DW_CFA_nop
, DW_CFA_nop
,
6111 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6112 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
6113 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6114 0, 0, 0, 0, /* .plt size goes here */
6115 0, /* Augmentation size */
6116 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
6117 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6118 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
6119 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6120 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6121 13, /* Block length */
6122 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
6123 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
6124 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6125 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
6126 DW_CFA_nop
, DW_CFA_nop
6129 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
6131 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
6132 elf_x86_64_nacl_plt_entry
, /* plt_entry */
6133 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6134 2, /* plt0_got1_offset */
6135 9, /* plt0_got2_offset */
6136 13, /* plt0_got2_insn_end */
6137 3, /* plt_got_offset */
6138 33, /* plt_reloc_offset */
6139 38, /* plt_plt_offset */
6140 7, /* plt_got_insn_size */
6141 42, /* plt_plt_insn_end */
6142 32, /* plt_lazy_offset */
6143 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
6144 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
6147 #undef elf_backend_arch_data
6148 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6150 #undef elf_backend_object_p
6151 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6152 #undef elf_backend_modify_segment_map
6153 #define elf_backend_modify_segment_map nacl_modify_segment_map
6154 #undef elf_backend_modify_program_headers
6155 #define elf_backend_modify_program_headers nacl_modify_program_headers
6156 #undef elf_backend_final_write_processing
6157 #define elf_backend_final_write_processing nacl_final_write_processing
6159 #include "elf64-target.h"
6161 /* Native Client x32 support. */
6164 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
6166 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6167 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
6171 #undef TARGET_LITTLE_SYM
6172 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6173 #undef TARGET_LITTLE_NAME
6174 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6176 #define elf32_bed elf32_x86_64_nacl_bed
6178 #define bfd_elf32_bfd_link_hash_table_create \
6179 elf_x86_64_link_hash_table_create
6180 #define bfd_elf32_bfd_reloc_type_lookup \
6181 elf_x86_64_reloc_type_lookup
6182 #define bfd_elf32_bfd_reloc_name_lookup \
6183 elf_x86_64_reloc_name_lookup
6184 #define bfd_elf32_mkobject \
6187 #undef elf_backend_object_p
6188 #define elf_backend_object_p \
6189 elf32_x86_64_nacl_elf_object_p
6191 #undef elf_backend_bfd_from_remote_memory
6192 #define elf_backend_bfd_from_remote_memory \
6193 _bfd_elf32_bfd_from_remote_memory
6195 #undef elf_backend_size_info
6196 #define elf_backend_size_info \
6197 _bfd_elf32_size_info
6199 #include "elf32-target.h"
6201 /* Restore defaults. */
6202 #undef elf_backend_object_p
6203 #define elf_backend_object_p elf64_x86_64_elf_object_p
6204 #undef elf_backend_bfd_from_remote_memory
6205 #undef elf_backend_size_info
6206 #undef elf_backend_modify_segment_map
6207 #undef elf_backend_modify_program_headers
6208 #undef elf_backend_final_write_processing
6210 /* Intel L1OM support. */
6213 elf64_l1om_elf_object_p (bfd
*abfd
)
6215 /* Set the right machine number for an L1OM elf64 file. */
6216 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
6220 #undef TARGET_LITTLE_SYM
6221 #define TARGET_LITTLE_SYM l1om_elf64_vec
6222 #undef TARGET_LITTLE_NAME
6223 #define TARGET_LITTLE_NAME "elf64-l1om"
6225 #define ELF_ARCH bfd_arch_l1om
6227 #undef ELF_MACHINE_CODE
6228 #define ELF_MACHINE_CODE EM_L1OM
6233 #define elf64_bed elf64_l1om_bed
6235 #undef elf_backend_object_p
6236 #define elf_backend_object_p elf64_l1om_elf_object_p
6238 /* Restore defaults. */
6239 #undef ELF_MAXPAGESIZE
6240 #undef ELF_MINPAGESIZE
6241 #undef ELF_COMMONPAGESIZE
6242 #define ELF_MAXPAGESIZE 0x200000
6243 #define ELF_MINPAGESIZE 0x1000
6244 #define ELF_COMMONPAGESIZE 0x1000
6245 #undef elf_backend_plt_alignment
6246 #define elf_backend_plt_alignment 4
6247 #undef elf_backend_arch_data
6248 #define elf_backend_arch_data &elf_x86_64_arch_bed
6250 #include "elf64-target.h"
6252 /* FreeBSD L1OM support. */
6254 #undef TARGET_LITTLE_SYM
6255 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6256 #undef TARGET_LITTLE_NAME
6257 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6260 #define ELF_OSABI ELFOSABI_FREEBSD
6263 #define elf64_bed elf64_l1om_fbsd_bed
6265 #include "elf64-target.h"
6267 /* Intel K1OM support. */
6270 elf64_k1om_elf_object_p (bfd
*abfd
)
6272 /* Set the right machine number for an K1OM elf64 file. */
6273 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
6277 #undef TARGET_LITTLE_SYM
6278 #define TARGET_LITTLE_SYM k1om_elf64_vec
6279 #undef TARGET_LITTLE_NAME
6280 #define TARGET_LITTLE_NAME "elf64-k1om"
6282 #define ELF_ARCH bfd_arch_k1om
6284 #undef ELF_MACHINE_CODE
6285 #define ELF_MACHINE_CODE EM_K1OM
6290 #define elf64_bed elf64_k1om_bed
6292 #undef elf_backend_object_p
6293 #define elf_backend_object_p elf64_k1om_elf_object_p
6295 #undef elf_backend_static_tls_alignment
6297 #undef elf_backend_want_plt_sym
6298 #define elf_backend_want_plt_sym 0
6300 #include "elf64-target.h"
6302 /* FreeBSD K1OM support. */
6304 #undef TARGET_LITTLE_SYM
6305 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6306 #undef TARGET_LITTLE_NAME
6307 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6310 #define ELF_OSABI ELFOSABI_FREEBSD
6313 #define elf64_bed elf64_k1om_fbsd_bed
6315 #include "elf64-target.h"
6317 /* 32bit x86-64 support. */
6319 #undef TARGET_LITTLE_SYM
6320 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6321 #undef TARGET_LITTLE_NAME
6322 #define TARGET_LITTLE_NAME "elf32-x86-64"
6326 #define ELF_ARCH bfd_arch_i386
6328 #undef ELF_MACHINE_CODE
6329 #define ELF_MACHINE_CODE EM_X86_64
6333 #undef elf_backend_object_p
6334 #define elf_backend_object_p \
6335 elf32_x86_64_elf_object_p
6337 #undef elf_backend_bfd_from_remote_memory
6338 #define elf_backend_bfd_from_remote_memory \
6339 _bfd_elf32_bfd_from_remote_memory
6341 #undef elf_backend_size_info
6342 #define elf_backend_size_info \
6343 _bfd_elf32_size_info
6345 #include "elf32-target.h"