1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka <jh@suse.cz>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #include "bfd_stdint.h"
32 #include "libiberty.h"
34 #include "elf/x86-64.h"
41 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
42 #define MINUS_ONE (~ (bfd_vma) 0)
44 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
45 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
46 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
47 since they are the same. */
49 #define ABI_64_P(abfd) \
50 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
52 /* The relocation "howto" table. Order of fields:
53 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
54 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
55 static reloc_howto_type x86_64_elf_howto_table
[] =
57 HOWTO(R_X86_64_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
58 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
60 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
61 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
63 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
64 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
66 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
67 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
69 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
70 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
72 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
73 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
75 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
76 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
78 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
79 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
81 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
84 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
85 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
87 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
88 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
90 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
91 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
93 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
95 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
97 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
99 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
100 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
101 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
104 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
105 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
107 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
110 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
111 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
113 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
114 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
116 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
117 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
119 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
120 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
122 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
123 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
125 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
128 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
130 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
131 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
132 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
133 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
134 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
135 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
137 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
138 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
140 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
141 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
142 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
143 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
144 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
146 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
147 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
149 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
150 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", FALSE
, 0xffffffff, 0xffffffff,
152 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, FALSE
, 0, complain_overflow_unsigned
,
153 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", FALSE
, MINUS_ONE
, MINUS_ONE
,
155 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
156 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
157 "R_X86_64_GOTPC32_TLSDESC",
158 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
159 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
160 complain_overflow_dont
, bfd_elf_generic_reloc
,
161 "R_X86_64_TLSDESC_CALL",
163 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
164 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
166 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
167 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
168 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
170 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
171 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
173 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
174 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", FALSE
, 0xffffffff, 0xffffffff,
176 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
177 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", FALSE
, 0xffffffff, 0xffffffff,
180 /* We have a gap in the reloc numbers here.
181 R_X86_64_standard counts the number up to this point, and
182 R_X86_64_vt_offset is the value to subtract from a reloc type of
183 R_X86_64_GNU_VT* to form an index into this table. */
184 #define R_X86_64_standard (R_X86_64_PLT32_BND + 1)
185 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
187 /* GNU extension to record C++ vtable hierarchy. */
188 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
189 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
191 /* GNU extension to record C++ vtable member usage. */
192 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
193 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
196 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
197 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
198 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
202 #define IS_X86_64_PCREL_TYPE(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
206 || ((TYPE) == R_X86_64_PC32_BND) \
207 || ((TYPE) == R_X86_64_PC64))
209 /* Map BFD relocs to the x86_64 elf relocs. */
212 bfd_reloc_code_real_type bfd_reloc_val
;
213 unsigned char elf_reloc_val
;
216 static const struct elf_reloc_map x86_64_reloc_map
[] =
218 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
219 { BFD_RELOC_64
, R_X86_64_64
, },
220 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
221 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
222 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
223 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
224 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
225 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
226 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
227 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
228 { BFD_RELOC_32
, R_X86_64_32
, },
229 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
230 { BFD_RELOC_16
, R_X86_64_16
, },
231 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
232 { BFD_RELOC_8
, R_X86_64_8
, },
233 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
234 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
235 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
236 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
237 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
238 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
239 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
240 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
241 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
242 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
243 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
244 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
245 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
246 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
247 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
248 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
249 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
250 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
251 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
252 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
253 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
254 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
255 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
256 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
,},
257 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
,},
258 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
259 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
262 static reloc_howto_type
*
263 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
267 if (r_type
== (unsigned int) R_X86_64_32
)
272 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
274 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
275 || r_type
>= (unsigned int) R_X86_64_max
)
277 if (r_type
>= (unsigned int) R_X86_64_standard
)
279 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
281 r_type
= R_X86_64_NONE
;
286 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
287 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
288 return &x86_64_elf_howto_table
[i
];
291 /* Given a BFD reloc type, return a HOWTO structure. */
292 static reloc_howto_type
*
293 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
294 bfd_reloc_code_real_type code
)
298 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
301 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
302 return elf_x86_64_rtype_to_howto (abfd
,
303 x86_64_reloc_map
[i
].elf_reloc_val
);
308 static reloc_howto_type
*
309 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
314 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
316 /* Get x32 R_X86_64_32. */
317 reloc_howto_type
*reloc
318 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
319 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
323 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
324 if (x86_64_elf_howto_table
[i
].name
!= NULL
325 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
326 return &x86_64_elf_howto_table
[i
];
331 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
334 elf_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
335 Elf_Internal_Rela
*dst
)
339 r_type
= ELF32_R_TYPE (dst
->r_info
);
340 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
341 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
344 /* Support for core dump NOTE sections. */
346 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
351 switch (note
->descsz
)
356 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
358 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
361 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
369 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
371 elf_tdata (abfd
)->core
->signal
372 = bfd_get_16 (abfd
, note
->descdata
+ 12);
375 elf_tdata (abfd
)->core
->lwpid
376 = bfd_get_32 (abfd
, note
->descdata
+ 32);
385 /* Make a ".reg/999" section. */
386 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
387 size
, note
->descpos
+ offset
);
391 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
393 switch (note
->descsz
)
398 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
399 elf_tdata (abfd
)->core
->pid
400 = bfd_get_32 (abfd
, note
->descdata
+ 12);
401 elf_tdata (abfd
)->core
->program
402 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
403 elf_tdata (abfd
)->core
->command
404 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
407 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
408 elf_tdata (abfd
)->core
->pid
409 = bfd_get_32 (abfd
, note
->descdata
+ 24);
410 elf_tdata (abfd
)->core
->program
411 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
412 elf_tdata (abfd
)->core
->command
413 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
416 /* Note that for some reason, a spurious space is tacked
417 onto the end of the args in some (at least one anyway)
418 implementations, so strip it off if it exists. */
421 char *command
= elf_tdata (abfd
)->core
->command
;
422 int n
= strlen (command
);
424 if (0 < n
&& command
[n
- 1] == ' ')
425 command
[n
- 1] = '\0';
433 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
436 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
438 const char *fname
, *psargs
;
449 va_start (ap
, note_type
);
450 fname
= va_arg (ap
, const char *);
451 psargs
= va_arg (ap
, const char *);
454 if (bed
->s
->elfclass
== ELFCLASS32
)
457 memset (&data
, 0, sizeof (data
));
458 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
459 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
460 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
461 &data
, sizeof (data
));
466 memset (&data
, 0, sizeof (data
));
467 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
468 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
469 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
470 &data
, sizeof (data
));
475 va_start (ap
, note_type
);
476 pid
= va_arg (ap
, long);
477 cursig
= va_arg (ap
, int);
478 gregs
= va_arg (ap
, const void *);
481 if (bed
->s
->elfclass
== ELFCLASS32
)
483 if (bed
->elf_machine_code
== EM_X86_64
)
485 prstatusx32_t prstat
;
486 memset (&prstat
, 0, sizeof (prstat
));
488 prstat
.pr_cursig
= cursig
;
489 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
490 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
491 &prstat
, sizeof (prstat
));
496 memset (&prstat
, 0, sizeof (prstat
));
498 prstat
.pr_cursig
= cursig
;
499 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
500 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
501 &prstat
, sizeof (prstat
));
507 memset (&prstat
, 0, sizeof (prstat
));
509 prstat
.pr_cursig
= cursig
;
510 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
511 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
512 &prstat
, sizeof (prstat
));
519 /* Functions for the x86-64 ELF linker. */
521 /* The name of the dynamic interpreter. This is put in the .interp
524 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
525 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
527 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
531 #define ELIMINATE_COPY_RELOCS 1
533 /* The size in bytes of an entry in the global offset table. */
535 #define GOT_ENTRY_SIZE 8
537 /* The size in bytes of an entry in the procedure linkage table. */
539 #define PLT_ENTRY_SIZE 16
541 /* The first entry in a procedure linkage table looks like this. See the
542 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
544 static const bfd_byte elf_x86_64_plt0_entry
[PLT_ENTRY_SIZE
] =
546 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
547 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
548 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
551 /* Subsequent entries in a procedure linkage table look like this. */
553 static const bfd_byte elf_x86_64_plt_entry
[PLT_ENTRY_SIZE
] =
555 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
556 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
557 0x68, /* pushq immediate */
558 0, 0, 0, 0, /* replaced with index into relocation table. */
559 0xe9, /* jmp relative */
560 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
563 /* The first entry in a procedure linkage table with BND relocations
566 static const bfd_byte elf_x86_64_bnd_plt0_entry
[PLT_ENTRY_SIZE
] =
568 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
569 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
570 0x0f, 0x1f, 0 /* nopl (%rax) */
573 /* Subsequent entries for legacy branches in a procedure linkage table
574 with BND relocations look like this. */
576 static const bfd_byte elf_x86_64_legacy_plt_entry
[PLT_ENTRY_SIZE
] =
578 0x68, 0, 0, 0, 0, /* pushq immediate */
579 0xe9, 0, 0, 0, 0, /* jmpq relative */
580 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
583 /* Subsequent entries for branches with BND prefx in a procedure linkage
584 table with BND relocations look like this. */
586 static const bfd_byte elf_x86_64_bnd_plt_entry
[PLT_ENTRY_SIZE
] =
588 0x68, 0, 0, 0, 0, /* pushq immediate */
589 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
590 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
593 /* Entries for legacy branches in the second procedure linkage table
596 static const bfd_byte elf_x86_64_legacy_plt2_entry
[8] =
598 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
599 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries for branches with BND prefix in the second procedure linkage
604 table look like this. */
606 static const bfd_byte elf_x86_64_bnd_plt2_entry
[8] =
608 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
609 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
613 /* .eh_frame covering the .plt section. */
615 static const bfd_byte elf_x86_64_eh_frame_plt
[] =
617 #define PLT_CIE_LENGTH 20
618 #define PLT_FDE_LENGTH 36
619 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
620 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
621 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
622 0, 0, 0, 0, /* CIE ID */
624 'z', 'R', 0, /* Augmentation string */
625 1, /* Code alignment factor */
626 0x78, /* Data alignment factor */
627 16, /* Return address column */
628 1, /* Augmentation size */
629 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
630 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
631 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
632 DW_CFA_nop
, DW_CFA_nop
,
634 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
635 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
636 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
637 0, 0, 0, 0, /* .plt size goes here */
638 0, /* Augmentation size */
639 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
640 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
641 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
642 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
643 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
644 11, /* Block length */
645 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
646 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
647 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
648 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
649 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
652 /* Architecture-specific backend data for x86-64. */
654 struct elf_x86_64_backend_data
656 /* Templates for the initial PLT entry and for subsequent entries. */
657 const bfd_byte
*plt0_entry
;
658 const bfd_byte
*plt_entry
;
659 unsigned int plt_entry_size
; /* Size of each PLT entry. */
661 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
662 unsigned int plt0_got1_offset
;
663 unsigned int plt0_got2_offset
;
665 /* Offset of the end of the PC-relative instruction containing
667 unsigned int plt0_got2_insn_end
;
669 /* Offsets into plt_entry that are to be replaced with... */
670 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
671 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
672 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
674 /* Length of the PC-relative instruction containing plt_got_offset. */
675 unsigned int plt_got_insn_size
;
677 /* Offset of the end of the PC-relative jump to plt0_entry. */
678 unsigned int plt_plt_insn_end
;
680 /* Offset into plt_entry where the initial value of the GOT entry points. */
681 unsigned int plt_lazy_offset
;
683 /* .eh_frame covering the .plt section. */
684 const bfd_byte
*eh_frame_plt
;
685 unsigned int eh_frame_plt_size
;
688 #define get_elf_x86_64_arch_data(bed) \
689 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
691 #define get_elf_x86_64_backend_data(abfd) \
692 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
694 #define GET_PLT_ENTRY_SIZE(abfd) \
695 get_elf_x86_64_backend_data (abfd)->plt_entry_size
697 /* These are the standard parameters. */
698 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
700 elf_x86_64_plt0_entry
, /* plt0_entry */
701 elf_x86_64_plt_entry
, /* plt_entry */
702 sizeof (elf_x86_64_plt_entry
), /* plt_entry_size */
703 2, /* plt0_got1_offset */
704 8, /* plt0_got2_offset */
705 12, /* plt0_got2_insn_end */
706 2, /* plt_got_offset */
707 7, /* plt_reloc_offset */
708 12, /* plt_plt_offset */
709 6, /* plt_got_insn_size */
710 PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
711 6, /* plt_lazy_offset */
712 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
713 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
716 static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed
=
718 elf_x86_64_bnd_plt0_entry
, /* plt0_entry */
719 elf_x86_64_bnd_plt_entry
, /* plt_entry */
720 sizeof (elf_x86_64_bnd_plt_entry
), /* plt_entry_size */
721 2, /* plt0_got1_offset */
722 1+8, /* plt0_got2_offset */
723 1+12, /* plt0_got2_insn_end */
724 1+2, /* plt_got_offset */
725 1, /* plt_reloc_offset */
726 7, /* plt_plt_offset */
727 1+6, /* plt_got_insn_size */
728 11, /* plt_plt_insn_end */
729 0, /* plt_lazy_offset */
730 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
731 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
734 #define elf_backend_arch_data &elf_x86_64_arch_bed
736 /* x86-64 ELF linker hash entry. */
738 struct elf_x86_64_link_hash_entry
740 struct elf_link_hash_entry elf
;
742 /* Track dynamic relocs copied for this symbol. */
743 struct elf_dyn_relocs
*dyn_relocs
;
745 #define GOT_UNKNOWN 0
749 #define GOT_TLS_GDESC 4
750 #define GOT_TLS_GD_BOTH_P(type) \
751 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
752 #define GOT_TLS_GD_P(type) \
753 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
754 #define GOT_TLS_GDESC_P(type) \
755 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
756 #define GOT_TLS_GD_ANY_P(type) \
757 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
758 unsigned char tls_type
;
760 /* TRUE if a weak symbol with a real definition needs a copy reloc.
761 When there is a weak symbol with a real definition, the processor
762 independent code will have arranged for us to see the real
763 definition first. We need to copy the needs_copy bit from the
764 real definition and check it when allowing copy reloc in PIE. */
765 unsigned int needs_copy
: 1;
767 /* TRUE if symbol has at least one BND relocation. */
768 unsigned int has_bnd_reloc
: 1;
770 /* Information about the GOT PLT entry. Filled when there are both
771 GOT and PLT relocations against the same function. */
772 union gotplt_union plt_got
;
774 /* Information about the second PLT entry. Filled when has_bnd_reloc is
776 union gotplt_union plt_bnd
;
778 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
779 starting at the end of the jump table. */
783 #define elf_x86_64_hash_entry(ent) \
784 ((struct elf_x86_64_link_hash_entry *)(ent))
786 struct elf_x86_64_obj_tdata
788 struct elf_obj_tdata root
;
790 /* tls_type for each local got entry. */
791 char *local_got_tls_type
;
793 /* GOTPLT entries for TLS descriptors. */
794 bfd_vma
*local_tlsdesc_gotent
;
797 #define elf_x86_64_tdata(abfd) \
798 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
800 #define elf_x86_64_local_got_tls_type(abfd) \
801 (elf_x86_64_tdata (abfd)->local_got_tls_type)
803 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
804 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
806 #define is_x86_64_elf(bfd) \
807 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
808 && elf_tdata (bfd) != NULL \
809 && elf_object_id (bfd) == X86_64_ELF_DATA)
812 elf_x86_64_mkobject (bfd
*abfd
)
814 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_x86_64_obj_tdata
),
818 /* x86-64 ELF linker hash table. */
820 struct elf_x86_64_link_hash_table
822 struct elf_link_hash_table elf
;
824 /* Short-cuts to get to dynamic linker sections. */
827 asection
*plt_eh_frame
;
833 bfd_signed_vma refcount
;
837 /* The amount of space used by the jump slots in the GOT. */
838 bfd_vma sgotplt_jump_table_size
;
840 /* Small local sym cache. */
841 struct sym_cache sym_cache
;
843 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
844 bfd_vma (*r_sym
) (bfd_vma
);
845 unsigned int pointer_r_type
;
846 const char *dynamic_interpreter
;
847 int dynamic_interpreter_size
;
849 /* _TLS_MODULE_BASE_ symbol. */
850 struct bfd_link_hash_entry
*tls_module_base
;
852 /* Used by local STT_GNU_IFUNC symbols. */
853 htab_t loc_hash_table
;
854 void * loc_hash_memory
;
856 /* The offset into splt of the PLT entry for the TLS descriptor
857 resolver. Special values are 0, if not necessary (or not found
858 to be necessary yet), and -1 if needed but not determined
861 /* The offset into sgot of the GOT entry used by the PLT entry
865 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
866 bfd_vma next_jump_slot_index
;
867 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
868 bfd_vma next_irelative_index
;
871 /* Get the x86-64 ELF linker hash table from a link_info structure. */
873 #define elf_x86_64_hash_table(p) \
874 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
875 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
877 #define elf_x86_64_compute_jump_table_size(htab) \
878 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
880 /* Create an entry in an x86-64 ELF linker hash table. */
882 static struct bfd_hash_entry
*
883 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
884 struct bfd_hash_table
*table
,
887 /* Allocate the structure if it has not already been allocated by a
891 entry
= (struct bfd_hash_entry
*)
892 bfd_hash_allocate (table
,
893 sizeof (struct elf_x86_64_link_hash_entry
));
898 /* Call the allocation method of the superclass. */
899 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
902 struct elf_x86_64_link_hash_entry
*eh
;
904 eh
= (struct elf_x86_64_link_hash_entry
*) entry
;
905 eh
->dyn_relocs
= NULL
;
906 eh
->tls_type
= GOT_UNKNOWN
;
908 eh
->has_bnd_reloc
= 0;
909 eh
->plt_bnd
.offset
= (bfd_vma
) -1;
910 eh
->plt_got
.offset
= (bfd_vma
) -1;
911 eh
->tlsdesc_got
= (bfd_vma
) -1;
917 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
918 for local symbol so that we can handle local STT_GNU_IFUNC symbols
919 as global symbol. We reuse indx and dynstr_index for local symbol
920 hash since they aren't used by global symbols in this backend. */
923 elf_x86_64_local_htab_hash (const void *ptr
)
925 struct elf_link_hash_entry
*h
926 = (struct elf_link_hash_entry
*) ptr
;
927 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
930 /* Compare local hash entries. */
933 elf_x86_64_local_htab_eq (const void *ptr1
, const void *ptr2
)
935 struct elf_link_hash_entry
*h1
936 = (struct elf_link_hash_entry
*) ptr1
;
937 struct elf_link_hash_entry
*h2
938 = (struct elf_link_hash_entry
*) ptr2
;
940 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
943 /* Find and/or create a hash entry for local symbol. */
945 static struct elf_link_hash_entry
*
946 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table
*htab
,
947 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
950 struct elf_x86_64_link_hash_entry e
, *ret
;
951 asection
*sec
= abfd
->sections
;
952 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
953 htab
->r_sym (rel
->r_info
));
956 e
.elf
.indx
= sec
->id
;
957 e
.elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
958 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
959 create
? INSERT
: NO_INSERT
);
966 ret
= (struct elf_x86_64_link_hash_entry
*) *slot
;
970 ret
= (struct elf_x86_64_link_hash_entry
*)
971 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
972 sizeof (struct elf_x86_64_link_hash_entry
));
975 memset (ret
, 0, sizeof (*ret
));
976 ret
->elf
.indx
= sec
->id
;
977 ret
->elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
978 ret
->elf
.dynindx
= -1;
979 ret
->plt_got
.offset
= (bfd_vma
) -1;
985 /* Destroy an X86-64 ELF linker hash table. */
988 elf_x86_64_link_hash_table_free (bfd
*obfd
)
990 struct elf_x86_64_link_hash_table
*htab
991 = (struct elf_x86_64_link_hash_table
*) obfd
->link
.hash
;
993 if (htab
->loc_hash_table
)
994 htab_delete (htab
->loc_hash_table
);
995 if (htab
->loc_hash_memory
)
996 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
997 _bfd_elf_link_hash_table_free (obfd
);
1000 /* Create an X86-64 ELF linker hash table. */
1002 static struct bfd_link_hash_table
*
1003 elf_x86_64_link_hash_table_create (bfd
*abfd
)
1005 struct elf_x86_64_link_hash_table
*ret
;
1006 bfd_size_type amt
= sizeof (struct elf_x86_64_link_hash_table
);
1008 ret
= (struct elf_x86_64_link_hash_table
*) bfd_zmalloc (amt
);
1012 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1013 elf_x86_64_link_hash_newfunc
,
1014 sizeof (struct elf_x86_64_link_hash_entry
),
1021 if (ABI_64_P (abfd
))
1023 ret
->r_info
= elf64_r_info
;
1024 ret
->r_sym
= elf64_r_sym
;
1025 ret
->pointer_r_type
= R_X86_64_64
;
1026 ret
->dynamic_interpreter
= ELF64_DYNAMIC_INTERPRETER
;
1027 ret
->dynamic_interpreter_size
= sizeof ELF64_DYNAMIC_INTERPRETER
;
1031 ret
->r_info
= elf32_r_info
;
1032 ret
->r_sym
= elf32_r_sym
;
1033 ret
->pointer_r_type
= R_X86_64_32
;
1034 ret
->dynamic_interpreter
= ELF32_DYNAMIC_INTERPRETER
;
1035 ret
->dynamic_interpreter_size
= sizeof ELF32_DYNAMIC_INTERPRETER
;
1038 ret
->loc_hash_table
= htab_try_create (1024,
1039 elf_x86_64_local_htab_hash
,
1040 elf_x86_64_local_htab_eq
,
1042 ret
->loc_hash_memory
= objalloc_create ();
1043 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1045 elf_x86_64_link_hash_table_free (abfd
);
1048 ret
->elf
.root
.hash_table_free
= elf_x86_64_link_hash_table_free
;
1050 return &ret
->elf
.root
;
1053 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1054 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1058 elf_x86_64_create_dynamic_sections (bfd
*dynobj
,
1059 struct bfd_link_info
*info
)
1061 struct elf_x86_64_link_hash_table
*htab
;
1063 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1066 htab
= elf_x86_64_hash_table (info
);
1070 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1074 if (info
->executable
)
1076 /* Always allow copy relocs for building executables. */
1077 asection
*s
= bfd_get_linker_section (dynobj
, ".rela.bss");
1080 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
1081 s
= bfd_make_section_anyway_with_flags (dynobj
,
1083 (bed
->dynamic_sec_flags
1086 || ! bfd_set_section_alignment (dynobj
, s
,
1087 bed
->s
->log_file_align
))
1093 if (!info
->no_ld_generated_unwind_info
1094 && htab
->plt_eh_frame
== NULL
1095 && htab
->elf
.splt
!= NULL
)
1097 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1098 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1099 | SEC_LINKER_CREATED
);
1101 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1102 if (htab
->plt_eh_frame
== NULL
1103 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 3))
1109 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1112 elf_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
1113 struct elf_link_hash_entry
*dir
,
1114 struct elf_link_hash_entry
*ind
)
1116 struct elf_x86_64_link_hash_entry
*edir
, *eind
;
1118 edir
= (struct elf_x86_64_link_hash_entry
*) dir
;
1119 eind
= (struct elf_x86_64_link_hash_entry
*) ind
;
1121 if (!edir
->has_bnd_reloc
)
1122 edir
->has_bnd_reloc
= eind
->has_bnd_reloc
;
1124 if (eind
->dyn_relocs
!= NULL
)
1126 if (edir
->dyn_relocs
!= NULL
)
1128 struct elf_dyn_relocs
**pp
;
1129 struct elf_dyn_relocs
*p
;
1131 /* Add reloc counts against the indirect sym to the direct sym
1132 list. Merge any entries against the same section. */
1133 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1135 struct elf_dyn_relocs
*q
;
1137 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1138 if (q
->sec
== p
->sec
)
1140 q
->pc_count
+= p
->pc_count
;
1141 q
->count
+= p
->count
;
1148 *pp
= edir
->dyn_relocs
;
1151 edir
->dyn_relocs
= eind
->dyn_relocs
;
1152 eind
->dyn_relocs
= NULL
;
1155 if (ind
->root
.type
== bfd_link_hash_indirect
1156 && dir
->got
.refcount
<= 0)
1158 edir
->tls_type
= eind
->tls_type
;
1159 eind
->tls_type
= GOT_UNKNOWN
;
1162 if (ELIMINATE_COPY_RELOCS
1163 && ind
->root
.type
!= bfd_link_hash_indirect
1164 && dir
->dynamic_adjusted
)
1166 /* If called to transfer flags for a weakdef during processing
1167 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1168 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1169 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1170 dir
->ref_regular
|= ind
->ref_regular
;
1171 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1172 dir
->needs_plt
|= ind
->needs_plt
;
1173 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1176 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1180 elf64_x86_64_elf_object_p (bfd
*abfd
)
1182 /* Set the right machine number for an x86-64 elf64 file. */
1183 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1188 elf32_x86_64_elf_object_p (bfd
*abfd
)
1190 /* Set the right machine number for an x86-64 elf32 file. */
1191 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1195 /* Return TRUE if the TLS access code sequence support transition
1199 elf_x86_64_check_tls_transition (bfd
*abfd
,
1200 struct bfd_link_info
*info
,
1203 Elf_Internal_Shdr
*symtab_hdr
,
1204 struct elf_link_hash_entry
**sym_hashes
,
1205 unsigned int r_type
,
1206 const Elf_Internal_Rela
*rel
,
1207 const Elf_Internal_Rela
*relend
)
1210 unsigned long r_symndx
;
1211 bfd_boolean largepic
= FALSE
;
1212 struct elf_link_hash_entry
*h
;
1214 struct elf_x86_64_link_hash_table
*htab
;
1216 /* Get the section contents. */
1217 if (contents
== NULL
)
1219 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1220 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1223 /* FIXME: How to better handle error condition? */
1224 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1227 /* Cache the section contents for elf_link_input_bfd. */
1228 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1232 htab
= elf_x86_64_hash_table (info
);
1233 offset
= rel
->r_offset
;
1236 case R_X86_64_TLSGD
:
1237 case R_X86_64_TLSLD
:
1238 if ((rel
+ 1) >= relend
)
1241 if (r_type
== R_X86_64_TLSGD
)
1243 /* Check transition from GD access model. For 64bit, only
1244 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1245 .word 0x6666; rex64; call __tls_get_addr
1246 can transit to different access model. For 32bit, only
1247 leaq foo@tlsgd(%rip), %rdi
1248 .word 0x6666; rex64; call __tls_get_addr
1249 can transit to different access model. For largepic
1251 leaq foo@tlsgd(%rip), %rdi
1252 movabsq $__tls_get_addr@pltoff, %rax
1256 static const unsigned char call
[] = { 0x66, 0x66, 0x48, 0xe8 };
1257 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1259 if ((offset
+ 12) > sec
->size
)
1262 if (memcmp (contents
+ offset
+ 4, call
, 4) != 0)
1264 if (!ABI_64_P (abfd
)
1265 || (offset
+ 19) > sec
->size
1267 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0
1268 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1269 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1274 else if (ABI_64_P (abfd
))
1277 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1283 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1289 /* Check transition from LD access model. Only
1290 leaq foo@tlsld(%rip), %rdi;
1292 can transit to different access model. For largepic
1294 leaq foo@tlsld(%rip), %rdi
1295 movabsq $__tls_get_addr@pltoff, %rax
1299 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1301 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1304 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1307 if (0xe8 != *(contents
+ offset
+ 4))
1309 if (!ABI_64_P (abfd
)
1310 || (offset
+ 19) > sec
->size
1311 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1312 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1319 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1320 if (r_symndx
< symtab_hdr
->sh_info
)
1323 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1324 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1325 may be versioned. */
1327 && h
->root
.root
.string
!= NULL
1329 ? ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLTOFF64
1330 : (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1331 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
))
1332 && (strncmp (h
->root
.root
.string
,
1333 "__tls_get_addr", 14) == 0));
1335 case R_X86_64_GOTTPOFF
:
1336 /* Check transition from IE access model:
1337 mov foo@gottpoff(%rip), %reg
1338 add foo@gottpoff(%rip), %reg
1341 /* Check REX prefix first. */
1342 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1344 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1345 if (val
!= 0x48 && val
!= 0x4c)
1347 /* X32 may have 0x44 REX prefix or no REX prefix. */
1348 if (ABI_64_P (abfd
))
1354 /* X32 may not have any REX prefix. */
1355 if (ABI_64_P (abfd
))
1357 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1361 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1362 if (val
!= 0x8b && val
!= 0x03)
1365 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1366 return (val
& 0xc7) == 5;
1368 case R_X86_64_GOTPC32_TLSDESC
:
1369 /* Check transition from GDesc access model:
1370 leaq x@tlsdesc(%rip), %rax
1372 Make sure it's a leaq adding rip to a 32-bit offset
1373 into any register, although it's probably almost always
1376 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1379 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1380 if ((val
& 0xfb) != 0x48)
1383 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1386 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1387 return (val
& 0xc7) == 0x05;
1389 case R_X86_64_TLSDESC_CALL
:
1390 /* Check transition from GDesc access model:
1391 call *x@tlsdesc(%rax)
1393 if (offset
+ 2 <= sec
->size
)
1395 /* Make sure that it's a call *x@tlsdesc(%rax). */
1396 static const unsigned char call
[] = { 0xff, 0x10 };
1397 return memcmp (contents
+ offset
, call
, 2) == 0;
1407 /* Return TRUE if the TLS access transition is OK or no transition
1408 will be performed. Update R_TYPE if there is a transition. */
1411 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1412 asection
*sec
, bfd_byte
*contents
,
1413 Elf_Internal_Shdr
*symtab_hdr
,
1414 struct elf_link_hash_entry
**sym_hashes
,
1415 unsigned int *r_type
, int tls_type
,
1416 const Elf_Internal_Rela
*rel
,
1417 const Elf_Internal_Rela
*relend
,
1418 struct elf_link_hash_entry
*h
,
1419 unsigned long r_symndx
)
1421 unsigned int from_type
= *r_type
;
1422 unsigned int to_type
= from_type
;
1423 bfd_boolean check
= TRUE
;
1425 /* Skip TLS transition for functions. */
1427 && (h
->type
== STT_FUNC
1428 || h
->type
== STT_GNU_IFUNC
))
1433 case R_X86_64_TLSGD
:
1434 case R_X86_64_GOTPC32_TLSDESC
:
1435 case R_X86_64_TLSDESC_CALL
:
1436 case R_X86_64_GOTTPOFF
:
1437 if (info
->executable
)
1440 to_type
= R_X86_64_TPOFF32
;
1442 to_type
= R_X86_64_GOTTPOFF
;
1445 /* When we are called from elf_x86_64_relocate_section,
1446 CONTENTS isn't NULL and there may be additional transitions
1447 based on TLS_TYPE. */
1448 if (contents
!= NULL
)
1450 unsigned int new_to_type
= to_type
;
1452 if (info
->executable
1455 && tls_type
== GOT_TLS_IE
)
1456 new_to_type
= R_X86_64_TPOFF32
;
1458 if (to_type
== R_X86_64_TLSGD
1459 || to_type
== R_X86_64_GOTPC32_TLSDESC
1460 || to_type
== R_X86_64_TLSDESC_CALL
)
1462 if (tls_type
== GOT_TLS_IE
)
1463 new_to_type
= R_X86_64_GOTTPOFF
;
1466 /* We checked the transition before when we were called from
1467 elf_x86_64_check_relocs. We only want to check the new
1468 transition which hasn't been checked before. */
1469 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1470 to_type
= new_to_type
;
1475 case R_X86_64_TLSLD
:
1476 if (info
->executable
)
1477 to_type
= R_X86_64_TPOFF32
;
1484 /* Return TRUE if there is no transition. */
1485 if (from_type
== to_type
)
1488 /* Check if the transition can be performed. */
1490 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1491 symtab_hdr
, sym_hashes
,
1492 from_type
, rel
, relend
))
1494 reloc_howto_type
*from
, *to
;
1497 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1498 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1501 name
= h
->root
.root
.string
;
1504 struct elf_x86_64_link_hash_table
*htab
;
1506 htab
= elf_x86_64_hash_table (info
);
1511 Elf_Internal_Sym
*isym
;
1513 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1515 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1519 (*_bfd_error_handler
)
1520 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1521 "in section `%A' failed"),
1522 abfd
, sec
, from
->name
, to
->name
, name
,
1523 (unsigned long) rel
->r_offset
);
1524 bfd_set_error (bfd_error_bad_value
);
1532 /* Rename some of the generic section flags to better document how they
1534 #define need_convert_mov_to_lea sec_flg0
1536 /* Look through the relocs for a section during the first phase, and
1537 calculate needed space in the global offset table, procedure
1538 linkage table, and dynamic reloc sections. */
1541 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1543 const Elf_Internal_Rela
*relocs
)
1545 struct elf_x86_64_link_hash_table
*htab
;
1546 Elf_Internal_Shdr
*symtab_hdr
;
1547 struct elf_link_hash_entry
**sym_hashes
;
1548 const Elf_Internal_Rela
*rel
;
1549 const Elf_Internal_Rela
*rel_end
;
1551 bfd_boolean use_plt_got
;
1553 if (info
->relocatable
)
1556 BFD_ASSERT (is_x86_64_elf (abfd
));
1558 htab
= elf_x86_64_hash_table (info
);
1562 use_plt_got
= get_elf_x86_64_backend_data (abfd
) == &elf_x86_64_arch_bed
;
1564 symtab_hdr
= &elf_symtab_hdr (abfd
);
1565 sym_hashes
= elf_sym_hashes (abfd
);
1569 rel_end
= relocs
+ sec
->reloc_count
;
1570 for (rel
= relocs
; rel
< rel_end
; rel
++)
1572 unsigned int r_type
;
1573 unsigned long r_symndx
;
1574 struct elf_link_hash_entry
*h
;
1575 Elf_Internal_Sym
*isym
;
1577 bfd_boolean size_reloc
;
1579 r_symndx
= htab
->r_sym (rel
->r_info
);
1580 r_type
= ELF32_R_TYPE (rel
->r_info
);
1582 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1584 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1589 if (r_symndx
< symtab_hdr
->sh_info
)
1591 /* A local symbol. */
1592 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1597 /* Check relocation against local STT_GNU_IFUNC symbol. */
1598 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1600 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
,
1605 /* Fake a STT_GNU_IFUNC symbol. */
1606 h
->type
= STT_GNU_IFUNC
;
1609 h
->forced_local
= 1;
1610 h
->root
.type
= bfd_link_hash_defined
;
1618 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1619 while (h
->root
.type
== bfd_link_hash_indirect
1620 || h
->root
.type
== bfd_link_hash_warning
)
1621 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1624 /* Check invalid x32 relocations. */
1625 if (!ABI_64_P (abfd
))
1631 case R_X86_64_DTPOFF64
:
1632 case R_X86_64_TPOFF64
:
1634 case R_X86_64_GOTOFF64
:
1635 case R_X86_64_GOT64
:
1636 case R_X86_64_GOTPCREL64
:
1637 case R_X86_64_GOTPC64
:
1638 case R_X86_64_GOTPLT64
:
1639 case R_X86_64_PLTOFF64
:
1642 name
= h
->root
.root
.string
;
1644 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1646 (*_bfd_error_handler
)
1647 (_("%B: relocation %s against symbol `%s' isn't "
1648 "supported in x32 mode"), abfd
,
1649 x86_64_elf_howto_table
[r_type
].name
, name
);
1650 bfd_set_error (bfd_error_bad_value
);
1658 /* Create the ifunc sections for static executables. If we
1659 never see an indirect function symbol nor we are building
1660 a static executable, those sections will be empty and
1661 won't appear in output. */
1667 case R_X86_64_PC32_BND
:
1668 case R_X86_64_PLT32_BND
:
1670 case R_X86_64_PLT32
:
1673 /* MPX PLT is supported only if elf_x86_64_arch_bed
1674 is used in 64-bit mode. */
1677 && (get_elf_x86_64_backend_data (abfd
)
1678 == &elf_x86_64_arch_bed
))
1680 elf_x86_64_hash_entry (h
)->has_bnd_reloc
= 1;
1682 /* Create the second PLT for Intel MPX support. */
1683 if (htab
->plt_bnd
== NULL
)
1685 unsigned int plt_bnd_align
;
1686 const struct elf_backend_data
*bed
;
1688 bed
= get_elf_backend_data (info
->output_bfd
);
1689 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry
) == 8
1690 && (sizeof (elf_x86_64_bnd_plt2_entry
)
1691 == sizeof (elf_x86_64_legacy_plt2_entry
)));
1694 if (htab
->elf
.dynobj
== NULL
)
1695 htab
->elf
.dynobj
= abfd
;
1697 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1699 (bed
->dynamic_sec_flags
1704 if (htab
->plt_bnd
== NULL
1705 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1714 case R_X86_64_GOTPCREL
:
1715 case R_X86_64_GOTPCREL64
:
1716 if (htab
->elf
.dynobj
== NULL
)
1717 htab
->elf
.dynobj
= abfd
;
1718 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1723 /* It is referenced by a non-shared object. */
1725 h
->root
.non_ir_ref
= 1;
1728 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1729 symtab_hdr
, sym_hashes
,
1730 &r_type
, GOT_UNKNOWN
,
1731 rel
, rel_end
, h
, r_symndx
))
1736 case R_X86_64_TLSLD
:
1737 htab
->tls_ld_got
.refcount
+= 1;
1740 case R_X86_64_TPOFF32
:
1741 if (!info
->executable
&& ABI_64_P (abfd
))
1744 name
= h
->root
.root
.string
;
1746 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1748 (*_bfd_error_handler
)
1749 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1751 x86_64_elf_howto_table
[r_type
].name
, name
);
1752 bfd_set_error (bfd_error_bad_value
);
1757 case R_X86_64_GOTTPOFF
:
1758 if (!info
->executable
)
1759 info
->flags
|= DF_STATIC_TLS
;
1762 case R_X86_64_GOT32
:
1763 case R_X86_64_GOTPCREL
:
1764 case R_X86_64_TLSGD
:
1765 case R_X86_64_GOT64
:
1766 case R_X86_64_GOTPCREL64
:
1767 case R_X86_64_GOTPLT64
:
1768 case R_X86_64_GOTPC32_TLSDESC
:
1769 case R_X86_64_TLSDESC_CALL
:
1770 /* This symbol requires a global offset table entry. */
1772 int tls_type
, old_tls_type
;
1776 default: tls_type
= GOT_NORMAL
; break;
1777 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1778 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1779 case R_X86_64_GOTPC32_TLSDESC
:
1780 case R_X86_64_TLSDESC_CALL
:
1781 tls_type
= GOT_TLS_GDESC
; break;
1786 h
->got
.refcount
+= 1;
1787 old_tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
1791 bfd_signed_vma
*local_got_refcounts
;
1793 /* This is a global offset table entry for a local symbol. */
1794 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1795 if (local_got_refcounts
== NULL
)
1799 size
= symtab_hdr
->sh_info
;
1800 size
*= sizeof (bfd_signed_vma
)
1801 + sizeof (bfd_vma
) + sizeof (char);
1802 local_got_refcounts
= ((bfd_signed_vma
*)
1803 bfd_zalloc (abfd
, size
));
1804 if (local_got_refcounts
== NULL
)
1806 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1807 elf_x86_64_local_tlsdesc_gotent (abfd
)
1808 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1809 elf_x86_64_local_got_tls_type (abfd
)
1810 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1812 local_got_refcounts
[r_symndx
] += 1;
1814 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1817 /* If a TLS symbol is accessed using IE at least once,
1818 there is no point to use dynamic model for it. */
1819 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1820 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1821 || tls_type
!= GOT_TLS_IE
))
1823 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1824 tls_type
= old_tls_type
;
1825 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1826 && GOT_TLS_GD_ANY_P (tls_type
))
1827 tls_type
|= old_tls_type
;
1831 name
= h
->root
.root
.string
;
1833 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1835 (*_bfd_error_handler
)
1836 (_("%B: '%s' accessed both as normal and thread local symbol"),
1838 bfd_set_error (bfd_error_bad_value
);
1843 if (old_tls_type
!= tls_type
)
1846 elf_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1848 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1853 case R_X86_64_GOTOFF64
:
1854 case R_X86_64_GOTPC32
:
1855 case R_X86_64_GOTPC64
:
1857 if (htab
->elf
.sgot
== NULL
)
1859 if (htab
->elf
.dynobj
== NULL
)
1860 htab
->elf
.dynobj
= abfd
;
1861 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1867 case R_X86_64_PLT32
:
1868 case R_X86_64_PLT32_BND
:
1869 /* This symbol requires a procedure linkage table entry. We
1870 actually build the entry in adjust_dynamic_symbol,
1871 because this might be a case of linking PIC code which is
1872 never referenced by a dynamic object, in which case we
1873 don't need to generate a procedure linkage table entry
1876 /* If this is a local symbol, we resolve it directly without
1877 creating a procedure linkage table entry. */
1882 h
->plt
.refcount
+= 1;
1885 case R_X86_64_PLTOFF64
:
1886 /* This tries to form the 'address' of a function relative
1887 to GOT. For global symbols we need a PLT entry. */
1891 h
->plt
.refcount
+= 1;
1895 case R_X86_64_SIZE32
:
1896 case R_X86_64_SIZE64
:
1901 if (!ABI_64_P (abfd
))
1906 /* Let's help debug shared library creation. These relocs
1907 cannot be used in shared libs. Don't error out for
1908 sections we don't care about, such as debug sections or
1909 non-constant sections. */
1911 && (sec
->flags
& SEC_ALLOC
) != 0
1912 && (sec
->flags
& SEC_READONLY
) != 0)
1915 name
= h
->root
.root
.string
;
1917 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1918 (*_bfd_error_handler
)
1919 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1920 abfd
, x86_64_elf_howto_table
[r_type
].name
, name
);
1921 bfd_set_error (bfd_error_bad_value
);
1929 case R_X86_64_PC32_BND
:
1933 if (h
!= NULL
&& info
->executable
)
1935 /* If this reloc is in a read-only section, we might
1936 need a copy reloc. We can't check reliably at this
1937 stage whether the section is read-only, as input
1938 sections have not yet been mapped to output sections.
1939 Tentatively set the flag for now, and correct in
1940 adjust_dynamic_symbol. */
1943 /* We may need a .plt entry if the function this reloc
1944 refers to is in a shared lib. */
1945 h
->plt
.refcount
+= 1;
1946 if (r_type
!= R_X86_64_PC32
1947 && r_type
!= R_X86_64_PC32_BND
1948 && r_type
!= R_X86_64_PC64
)
1949 h
->pointer_equality_needed
= 1;
1954 /* If we are creating a shared library, and this is a reloc
1955 against a global symbol, or a non PC relative reloc
1956 against a local symbol, then we need to copy the reloc
1957 into the shared library. However, if we are linking with
1958 -Bsymbolic, we do not need to copy a reloc against a
1959 global symbol which is defined in an object we are
1960 including in the link (i.e., DEF_REGULAR is set). At
1961 this point we have not seen all the input files, so it is
1962 possible that DEF_REGULAR is not set now but will be set
1963 later (it is never cleared). In case of a weak definition,
1964 DEF_REGULAR may be cleared later by a strong definition in
1965 a shared library. We account for that possibility below by
1966 storing information in the relocs_copied field of the hash
1967 table entry. A similar situation occurs when creating
1968 shared libraries and symbol visibility changes render the
1971 If on the other hand, we are creating an executable, we
1972 may need to keep relocations for symbols satisfied by a
1973 dynamic library if we manage to avoid copy relocs for the
1976 && (sec
->flags
& SEC_ALLOC
) != 0
1977 && (! IS_X86_64_PCREL_TYPE (r_type
)
1979 && (! SYMBOLIC_BIND (info
, h
)
1980 || h
->root
.type
== bfd_link_hash_defweak
1981 || !h
->def_regular
))))
1982 || (ELIMINATE_COPY_RELOCS
1984 && (sec
->flags
& SEC_ALLOC
) != 0
1986 && (h
->root
.type
== bfd_link_hash_defweak
1987 || !h
->def_regular
)))
1989 struct elf_dyn_relocs
*p
;
1990 struct elf_dyn_relocs
**head
;
1992 /* We must copy these reloc types into the output file.
1993 Create a reloc section in dynobj and make room for
1997 if (htab
->elf
.dynobj
== NULL
)
1998 htab
->elf
.dynobj
= abfd
;
2000 sreloc
= _bfd_elf_make_dynamic_reloc_section
2001 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2002 abfd
, /*rela?*/ TRUE
);
2008 /* If this is a global symbol, we count the number of
2009 relocations we need for this symbol. */
2012 head
= &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
2016 /* Track dynamic relocs needed for local syms too.
2017 We really need local syms available to do this
2022 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2027 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2031 /* Beware of type punned pointers vs strict aliasing
2033 vpp
= &(elf_section_data (s
)->local_dynrel
);
2034 head
= (struct elf_dyn_relocs
**)vpp
;
2038 if (p
== NULL
|| p
->sec
!= sec
)
2040 bfd_size_type amt
= sizeof *p
;
2042 p
= ((struct elf_dyn_relocs
*)
2043 bfd_alloc (htab
->elf
.dynobj
, amt
));
2054 /* Count size relocation as PC-relative relocation. */
2055 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
2060 /* This relocation describes the C++ object vtable hierarchy.
2061 Reconstruct it for later use during GC. */
2062 case R_X86_64_GNU_VTINHERIT
:
2063 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2067 /* This relocation describes which C++ vtable entries are actually
2068 used. Record for later use during GC. */
2069 case R_X86_64_GNU_VTENTRY
:
2070 BFD_ASSERT (h
!= NULL
);
2072 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2082 && h
->plt
.refcount
> 0
2083 && h
->got
.refcount
> 0
2084 && htab
->plt_got
== NULL
)
2086 /* Create the GOT procedure linkage table. */
2087 unsigned int plt_got_align
;
2088 const struct elf_backend_data
*bed
;
2090 bed
= get_elf_backend_data (info
->output_bfd
);
2091 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry
) == 8
2092 && (sizeof (elf_x86_64_bnd_plt2_entry
)
2093 == sizeof (elf_x86_64_legacy_plt2_entry
)));
2096 if (htab
->elf
.dynobj
== NULL
)
2097 htab
->elf
.dynobj
= abfd
;
2099 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
2101 (bed
->dynamic_sec_flags
2106 if (htab
->plt_got
== NULL
2107 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
2113 if (r_type
== R_X86_64_GOTPCREL
2114 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2115 sec
->need_convert_mov_to_lea
= 1;
2121 /* Return the section that should be marked against GC for a given
2125 elf_x86_64_gc_mark_hook (asection
*sec
,
2126 struct bfd_link_info
*info
,
2127 Elf_Internal_Rela
*rel
,
2128 struct elf_link_hash_entry
*h
,
2129 Elf_Internal_Sym
*sym
)
2132 switch (ELF32_R_TYPE (rel
->r_info
))
2134 case R_X86_64_GNU_VTINHERIT
:
2135 case R_X86_64_GNU_VTENTRY
:
2139 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2142 /* Update the got entry reference counts for the section being removed. */
2145 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
2147 const Elf_Internal_Rela
*relocs
)
2149 struct elf_x86_64_link_hash_table
*htab
;
2150 Elf_Internal_Shdr
*symtab_hdr
;
2151 struct elf_link_hash_entry
**sym_hashes
;
2152 bfd_signed_vma
*local_got_refcounts
;
2153 const Elf_Internal_Rela
*rel
, *relend
;
2155 if (info
->relocatable
)
2158 htab
= elf_x86_64_hash_table (info
);
2162 elf_section_data (sec
)->local_dynrel
= NULL
;
2164 symtab_hdr
= &elf_symtab_hdr (abfd
);
2165 sym_hashes
= elf_sym_hashes (abfd
);
2166 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2168 htab
= elf_x86_64_hash_table (info
);
2169 relend
= relocs
+ sec
->reloc_count
;
2170 for (rel
= relocs
; rel
< relend
; rel
++)
2172 unsigned long r_symndx
;
2173 unsigned int r_type
;
2174 struct elf_link_hash_entry
*h
= NULL
;
2176 r_symndx
= htab
->r_sym (rel
->r_info
);
2177 if (r_symndx
>= symtab_hdr
->sh_info
)
2179 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2180 while (h
->root
.type
== bfd_link_hash_indirect
2181 || h
->root
.type
== bfd_link_hash_warning
)
2182 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2186 /* A local symbol. */
2187 Elf_Internal_Sym
*isym
;
2189 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2192 /* Check relocation against local STT_GNU_IFUNC symbol. */
2194 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2196 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2204 struct elf_x86_64_link_hash_entry
*eh
;
2205 struct elf_dyn_relocs
**pp
;
2206 struct elf_dyn_relocs
*p
;
2208 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2210 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2213 /* Everything must go for SEC. */
2219 r_type
= ELF32_R_TYPE (rel
->r_info
);
2220 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
2221 symtab_hdr
, sym_hashes
,
2222 &r_type
, GOT_UNKNOWN
,
2223 rel
, relend
, h
, r_symndx
))
2228 case R_X86_64_TLSLD
:
2229 if (htab
->tls_ld_got
.refcount
> 0)
2230 htab
->tls_ld_got
.refcount
-= 1;
2233 case R_X86_64_TLSGD
:
2234 case R_X86_64_GOTPC32_TLSDESC
:
2235 case R_X86_64_TLSDESC_CALL
:
2236 case R_X86_64_GOTTPOFF
:
2237 case R_X86_64_GOT32
:
2238 case R_X86_64_GOTPCREL
:
2239 case R_X86_64_GOT64
:
2240 case R_X86_64_GOTPCREL64
:
2241 case R_X86_64_GOTPLT64
:
2244 if (h
->got
.refcount
> 0)
2245 h
->got
.refcount
-= 1;
2246 if (h
->type
== STT_GNU_IFUNC
)
2248 if (h
->plt
.refcount
> 0)
2249 h
->plt
.refcount
-= 1;
2252 else if (local_got_refcounts
!= NULL
)
2254 if (local_got_refcounts
[r_symndx
] > 0)
2255 local_got_refcounts
[r_symndx
] -= 1;
2267 case R_X86_64_PC32_BND
:
2269 case R_X86_64_SIZE32
:
2270 case R_X86_64_SIZE64
:
2272 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2276 case R_X86_64_PLT32
:
2277 case R_X86_64_PLT32_BND
:
2278 case R_X86_64_PLTOFF64
:
2281 if (h
->plt
.refcount
> 0)
2282 h
->plt
.refcount
-= 1;
2294 /* Adjust a symbol defined by a dynamic object and referenced by a
2295 regular object. The current definition is in some section of the
2296 dynamic object, but we're not including those sections. We have to
2297 change the definition to something the rest of the link can
2301 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2302 struct elf_link_hash_entry
*h
)
2304 struct elf_x86_64_link_hash_table
*htab
;
2306 struct elf_x86_64_link_hash_entry
*eh
;
2307 struct elf_dyn_relocs
*p
;
2309 /* STT_GNU_IFUNC symbol must go through PLT. */
2310 if (h
->type
== STT_GNU_IFUNC
)
2312 /* All local STT_GNU_IFUNC references must be treate as local
2313 calls via local PLT. */
2315 && SYMBOL_CALLS_LOCAL (info
, h
))
2317 bfd_size_type pc_count
= 0, count
= 0;
2318 struct elf_dyn_relocs
**pp
;
2320 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2321 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2323 pc_count
+= p
->pc_count
;
2324 p
->count
-= p
->pc_count
;
2333 if (pc_count
|| count
)
2337 if (h
->plt
.refcount
<= 0)
2338 h
->plt
.refcount
= 1;
2340 h
->plt
.refcount
+= 1;
2344 if (h
->plt
.refcount
<= 0)
2346 h
->plt
.offset
= (bfd_vma
) -1;
2352 /* If this is a function, put it in the procedure linkage table. We
2353 will fill in the contents of the procedure linkage table later,
2354 when we know the address of the .got section. */
2355 if (h
->type
== STT_FUNC
2358 if (h
->plt
.refcount
<= 0
2359 || SYMBOL_CALLS_LOCAL (info
, h
)
2360 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2361 && h
->root
.type
== bfd_link_hash_undefweak
))
2363 /* This case can occur if we saw a PLT32 reloc in an input
2364 file, but the symbol was never referred to by a dynamic
2365 object, or if all references were garbage collected. In
2366 such a case, we don't actually need to build a procedure
2367 linkage table, and we can just do a PC32 reloc instead. */
2368 h
->plt
.offset
= (bfd_vma
) -1;
2375 /* It's possible that we incorrectly decided a .plt reloc was
2376 needed for an R_X86_64_PC32 reloc to a non-function sym in
2377 check_relocs. We can't decide accurately between function and
2378 non-function syms in check-relocs; Objects loaded later in
2379 the link may change h->type. So fix it now. */
2380 h
->plt
.offset
= (bfd_vma
) -1;
2382 /* If this is a weak symbol, and there is a real definition, the
2383 processor independent code will have arranged for us to see the
2384 real definition first, and we can just use the same value. */
2385 if (h
->u
.weakdef
!= NULL
)
2387 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2388 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2389 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2390 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2391 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2393 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2394 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2395 eh
->needs_copy
= h
->u
.weakdef
->needs_copy
;
2400 /* This is a reference to a symbol defined by a dynamic object which
2401 is not a function. */
2403 /* If we are creating a shared library, we must presume that the
2404 only references to the symbol are via the global offset table.
2405 For such cases we need not do anything here; the relocations will
2406 be handled correctly by relocate_section. */
2407 if (!info
->executable
)
2410 /* If there are no references to this symbol that do not use the
2411 GOT, we don't need to generate a copy reloc. */
2412 if (!h
->non_got_ref
)
2415 /* If -z nocopyreloc was given, we won't generate them either. */
2416 if (info
->nocopyreloc
)
2422 if (ELIMINATE_COPY_RELOCS
)
2424 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2425 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2427 s
= p
->sec
->output_section
;
2428 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2432 /* If we didn't find any dynamic relocs in read-only sections, then
2433 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2441 /* We must allocate the symbol in our .dynbss section, which will
2442 become part of the .bss section of the executable. There will be
2443 an entry for this symbol in the .dynsym section. The dynamic
2444 object will contain position independent code, so all references
2445 from the dynamic object to this symbol will go through the global
2446 offset table. The dynamic linker will use the .dynsym entry to
2447 determine the address it must put in the global offset table, so
2448 both the dynamic object and the regular object will refer to the
2449 same memory location for the variable. */
2451 htab
= elf_x86_64_hash_table (info
);
2455 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2456 to copy the initial value out of the dynamic object and into the
2457 runtime process image. */
2458 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2460 const struct elf_backend_data
*bed
;
2461 bed
= get_elf_backend_data (info
->output_bfd
);
2462 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2468 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2471 /* Allocate space in .plt, .got and associated reloc sections for
2475 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2477 struct bfd_link_info
*info
;
2478 struct elf_x86_64_link_hash_table
*htab
;
2479 struct elf_x86_64_link_hash_entry
*eh
;
2480 struct elf_dyn_relocs
*p
;
2481 const struct elf_backend_data
*bed
;
2482 unsigned int plt_entry_size
;
2484 if (h
->root
.type
== bfd_link_hash_indirect
)
2487 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2489 info
= (struct bfd_link_info
*) inf
;
2490 htab
= elf_x86_64_hash_table (info
);
2493 bed
= get_elf_backend_data (info
->output_bfd
);
2494 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2496 /* We can't use the GOT PLT if pointer equality is needed since
2497 finish_dynamic_symbol won't clear symbol value and the dynamic
2498 linker won't update the GOT slot. We will get into an infinite
2499 loop at run-time. */
2500 if (htab
->plt_got
!= NULL
2501 && h
->type
!= STT_GNU_IFUNC
2502 && !h
->pointer_equality_needed
2503 && h
->plt
.refcount
> 0
2504 && h
->got
.refcount
> 0)
2506 /* Don't use the regular PLT if there are both GOT and GOTPLT
2508 h
->plt
.offset
= (bfd_vma
) -1;
2510 /* Use the GOT PLT. */
2511 eh
->plt_got
.refcount
= 1;
2514 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2515 here if it is defined and referenced in a non-shared object. */
2516 if (h
->type
== STT_GNU_IFUNC
2519 if (_bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2525 asection
*s
= htab
->plt_bnd
;
2526 if (h
->plt
.offset
!= (bfd_vma
) -1 && s
!= NULL
)
2528 /* Use the .plt.bnd section if it is created. */
2529 eh
->plt_bnd
.offset
= s
->size
;
2531 /* Make room for this entry in the .plt.bnd section. */
2532 s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2540 else if (htab
->elf
.dynamic_sections_created
2541 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2543 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
2545 /* Make sure this symbol is output as a dynamic symbol.
2546 Undefined weak syms won't yet be marked as dynamic. */
2547 if (h
->dynindx
== -1
2548 && !h
->forced_local
)
2550 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2555 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2557 asection
*s
= htab
->elf
.splt
;
2558 asection
*bnd_s
= htab
->plt_bnd
;
2559 asection
*got_s
= htab
->plt_got
;
2562 eh
->plt_got
.offset
= got_s
->size
;
2565 /* If this is the first .plt entry, make room for the
2566 special first entry. */
2568 s
->size
= plt_entry_size
;
2569 h
->plt
.offset
= s
->size
;
2571 eh
->plt_bnd
.offset
= bnd_s
->size
;
2574 /* If this symbol is not defined in a regular file, and we are
2575 not generating a shared library, then set the symbol to this
2576 location in the .plt. This is required to make function
2577 pointers compare as equal between the normal executable and
2578 the shared library. */
2584 /* We need to make a call to the entry of the GOT PLT
2585 instead of regular PLT entry. */
2586 h
->root
.u
.def
.section
= got_s
;
2587 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2593 /* We need to make a call to the entry of the second
2594 PLT instead of regular PLT entry. */
2595 h
->root
.u
.def
.section
= bnd_s
;
2596 h
->root
.u
.def
.value
= eh
->plt_bnd
.offset
;
2600 h
->root
.u
.def
.section
= s
;
2601 h
->root
.u
.def
.value
= h
->plt
.offset
;
2606 /* Make room for this entry. */
2608 got_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2611 s
->size
+= plt_entry_size
;
2613 bnd_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2615 /* We also need to make an entry in the .got.plt section,
2616 which will be placed in the .got section by the linker
2618 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2620 /* We also need to make an entry in the .rela.plt
2622 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2623 htab
->elf
.srelplt
->reloc_count
++;
2628 h
->plt
.offset
= (bfd_vma
) -1;
2634 h
->plt
.offset
= (bfd_vma
) -1;
2638 eh
->tlsdesc_got
= (bfd_vma
) -1;
2640 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2641 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2642 if (h
->got
.refcount
> 0
2645 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2647 h
->got
.offset
= (bfd_vma
) -1;
2649 else if (h
->got
.refcount
> 0)
2653 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2655 /* Make sure this symbol is output as a dynamic symbol.
2656 Undefined weak syms won't yet be marked as dynamic. */
2657 if (h
->dynindx
== -1
2658 && !h
->forced_local
)
2660 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2664 if (GOT_TLS_GDESC_P (tls_type
))
2666 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2667 - elf_x86_64_compute_jump_table_size (htab
);
2668 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2669 h
->got
.offset
= (bfd_vma
) -2;
2671 if (! GOT_TLS_GDESC_P (tls_type
)
2672 || GOT_TLS_GD_P (tls_type
))
2675 h
->got
.offset
= s
->size
;
2676 s
->size
+= GOT_ENTRY_SIZE
;
2677 if (GOT_TLS_GD_P (tls_type
))
2678 s
->size
+= GOT_ENTRY_SIZE
;
2680 dyn
= htab
->elf
.dynamic_sections_created
;
2681 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2683 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2684 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2685 || tls_type
== GOT_TLS_IE
)
2686 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2687 else if (GOT_TLS_GD_P (tls_type
))
2688 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2689 else if (! GOT_TLS_GDESC_P (tls_type
)
2690 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2691 || h
->root
.type
!= bfd_link_hash_undefweak
)
2693 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2694 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2695 if (GOT_TLS_GDESC_P (tls_type
))
2697 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2698 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2702 h
->got
.offset
= (bfd_vma
) -1;
2704 if (eh
->dyn_relocs
== NULL
)
2707 /* In the shared -Bsymbolic case, discard space allocated for
2708 dynamic pc-relative relocs against symbols which turn out to be
2709 defined in regular objects. For the normal shared case, discard
2710 space for pc-relative relocs that have become local due to symbol
2711 visibility changes. */
2715 /* Relocs that use pc_count are those that appear on a call
2716 insn, or certain REL relocs that can generated via assembly.
2717 We want calls to protected symbols to resolve directly to the
2718 function rather than going via the plt. If people want
2719 function pointer comparisons to work as expected then they
2720 should avoid writing weird assembly. */
2721 if (SYMBOL_CALLS_LOCAL (info
, h
))
2723 struct elf_dyn_relocs
**pp
;
2725 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2727 p
->count
-= p
->pc_count
;
2736 /* Also discard relocs on undefined weak syms with non-default
2738 if (eh
->dyn_relocs
!= NULL
)
2740 if (h
->root
.type
== bfd_link_hash_undefweak
)
2742 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2743 eh
->dyn_relocs
= NULL
;
2745 /* Make sure undefined weak symbols are output as a dynamic
2747 else if (h
->dynindx
== -1
2748 && ! h
->forced_local
2749 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2752 /* For PIE, discard space for pc-relative relocs against
2753 symbols which turn out to need copy relocs. */
2754 else if (info
->executable
2755 && (h
->needs_copy
|| eh
->needs_copy
)
2759 struct elf_dyn_relocs
**pp
;
2761 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2763 if (p
->pc_count
!= 0)
2771 else if (ELIMINATE_COPY_RELOCS
)
2773 /* For the non-shared case, discard space for relocs against
2774 symbols which turn out to need copy relocs or are not
2780 || (htab
->elf
.dynamic_sections_created
2781 && (h
->root
.type
== bfd_link_hash_undefweak
2782 || h
->root
.type
== bfd_link_hash_undefined
))))
2784 /* Make sure this symbol is output as a dynamic symbol.
2785 Undefined weak syms won't yet be marked as dynamic. */
2786 if (h
->dynindx
== -1
2787 && ! h
->forced_local
2788 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2791 /* If that succeeded, we know we'll be keeping all the
2793 if (h
->dynindx
!= -1)
2797 eh
->dyn_relocs
= NULL
;
2802 /* Finally, allocate space. */
2803 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2807 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2809 BFD_ASSERT (sreloc
!= NULL
);
2811 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2817 /* Allocate space in .plt, .got and associated reloc sections for
2818 local dynamic relocs. */
2821 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2823 struct elf_link_hash_entry
*h
2824 = (struct elf_link_hash_entry
*) *slot
;
2826 if (h
->type
!= STT_GNU_IFUNC
2830 || h
->root
.type
!= bfd_link_hash_defined
)
2833 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2836 /* Find any dynamic relocs that apply to read-only sections. */
2839 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2842 struct elf_x86_64_link_hash_entry
*eh
;
2843 struct elf_dyn_relocs
*p
;
2845 /* Skip local IFUNC symbols. */
2846 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2849 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2850 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2852 asection
*s
= p
->sec
->output_section
;
2854 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2856 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2858 info
->flags
|= DF_TEXTREL
;
2860 if ((info
->warn_shared_textrel
&& info
->shared
)
2861 || info
->error_textrel
)
2862 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2863 p
->sec
->owner
, h
->root
.root
.string
,
2866 /* Not an error, just cut short the traversal. */
2874 mov foo@GOTPCREL(%rip), %reg
2877 with the local symbol, foo. */
2880 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2881 struct bfd_link_info
*link_info
)
2883 Elf_Internal_Shdr
*symtab_hdr
;
2884 Elf_Internal_Rela
*internal_relocs
;
2885 Elf_Internal_Rela
*irel
, *irelend
;
2887 struct elf_x86_64_link_hash_table
*htab
;
2888 bfd_boolean changed_contents
;
2889 bfd_boolean changed_relocs
;
2890 bfd_signed_vma
*local_got_refcounts
;
2892 /* Don't even try to convert non-ELF outputs. */
2893 if (!is_elf_hash_table (link_info
->hash
))
2896 /* Nothing to do if there is no need or no output. */
2897 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2898 || sec
->need_convert_mov_to_lea
== 0
2899 || bfd_is_abs_section (sec
->output_section
))
2902 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2904 /* Load the relocations for this section. */
2905 internal_relocs
= (_bfd_elf_link_read_relocs
2906 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2907 link_info
->keep_memory
));
2908 if (internal_relocs
== NULL
)
2911 htab
= elf_x86_64_hash_table (link_info
);
2912 changed_contents
= FALSE
;
2913 changed_relocs
= FALSE
;
2914 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2916 /* Get the section contents. */
2917 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2918 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2921 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2925 irelend
= internal_relocs
+ sec
->reloc_count
;
2926 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2928 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2929 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2931 struct elf_link_hash_entry
*h
;
2933 if (r_type
!= R_X86_64_GOTPCREL
)
2936 /* Get the symbol referred to by the reloc. */
2937 if (r_symndx
< symtab_hdr
->sh_info
)
2939 Elf_Internal_Sym
*isym
;
2941 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2944 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2945 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2946 && irel
->r_offset
>= 2
2947 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2949 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2950 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2951 if (local_got_refcounts
!= NULL
2952 && local_got_refcounts
[r_symndx
] > 0)
2953 local_got_refcounts
[r_symndx
] -= 1;
2954 changed_contents
= TRUE
;
2955 changed_relocs
= TRUE
;
2960 indx
= r_symndx
- symtab_hdr
->sh_info
;
2961 h
= elf_sym_hashes (abfd
)[indx
];
2962 BFD_ASSERT (h
!= NULL
);
2964 while (h
->root
.type
== bfd_link_hash_indirect
2965 || h
->root
.type
== bfd_link_hash_warning
)
2966 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2968 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2969 avoid optimizing _DYNAMIC since ld.so may use its link-time
2972 && h
->type
!= STT_GNU_IFUNC
2973 && h
!= htab
->elf
.hdynamic
2974 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2975 && irel
->r_offset
>= 2
2976 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2978 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2979 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2980 if (h
->got
.refcount
> 0)
2981 h
->got
.refcount
-= 1;
2982 changed_contents
= TRUE
;
2983 changed_relocs
= TRUE
;
2987 if (contents
!= NULL
2988 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2990 if (!changed_contents
&& !link_info
->keep_memory
)
2994 /* Cache the section contents for elf_link_input_bfd. */
2995 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2999 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3001 if (!changed_relocs
)
3002 free (internal_relocs
);
3004 elf_section_data (sec
)->relocs
= internal_relocs
;
3010 if (contents
!= NULL
3011 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3013 if (internal_relocs
!= NULL
3014 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3015 free (internal_relocs
);
3019 /* Set the sizes of the dynamic sections. */
3022 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
3023 struct bfd_link_info
*info
)
3025 struct elf_x86_64_link_hash_table
*htab
;
3030 const struct elf_backend_data
*bed
;
3032 htab
= elf_x86_64_hash_table (info
);
3035 bed
= get_elf_backend_data (output_bfd
);
3037 dynobj
= htab
->elf
.dynobj
;
3041 if (htab
->elf
.dynamic_sections_created
)
3043 /* Set the contents of the .interp section to the interpreter. */
3044 if (info
->executable
)
3046 s
= bfd_get_linker_section (dynobj
, ".interp");
3049 s
->size
= htab
->dynamic_interpreter_size
;
3050 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
3054 /* Set up .got offsets for local syms, and space for local dynamic
3056 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3058 bfd_signed_vma
*local_got
;
3059 bfd_signed_vma
*end_local_got
;
3060 char *local_tls_type
;
3061 bfd_vma
*local_tlsdesc_gotent
;
3062 bfd_size_type locsymcount
;
3063 Elf_Internal_Shdr
*symtab_hdr
;
3066 if (! is_x86_64_elf (ibfd
))
3069 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3071 struct elf_dyn_relocs
*p
;
3073 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
3076 for (p
= (struct elf_dyn_relocs
*)
3077 (elf_section_data (s
)->local_dynrel
);
3081 if (!bfd_is_abs_section (p
->sec
)
3082 && bfd_is_abs_section (p
->sec
->output_section
))
3084 /* Input section has been discarded, either because
3085 it is a copy of a linkonce section or due to
3086 linker script /DISCARD/, so we'll be discarding
3089 else if (p
->count
!= 0)
3091 srel
= elf_section_data (p
->sec
)->sreloc
;
3092 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3093 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3094 && (info
->flags
& DF_TEXTREL
) == 0)
3096 info
->flags
|= DF_TEXTREL
;
3097 if ((info
->warn_shared_textrel
&& info
->shared
)
3098 || info
->error_textrel
)
3099 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3100 p
->sec
->owner
, p
->sec
);
3106 local_got
= elf_local_got_refcounts (ibfd
);
3110 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3111 locsymcount
= symtab_hdr
->sh_info
;
3112 end_local_got
= local_got
+ locsymcount
;
3113 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
3114 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
3116 srel
= htab
->elf
.srelgot
;
3117 for (; local_got
< end_local_got
;
3118 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3120 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3123 if (GOT_TLS_GDESC_P (*local_tls_type
))
3125 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3126 - elf_x86_64_compute_jump_table_size (htab
);
3127 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3128 *local_got
= (bfd_vma
) -2;
3130 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3131 || GOT_TLS_GD_P (*local_tls_type
))
3133 *local_got
= s
->size
;
3134 s
->size
+= GOT_ENTRY_SIZE
;
3135 if (GOT_TLS_GD_P (*local_tls_type
))
3136 s
->size
+= GOT_ENTRY_SIZE
;
3139 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3140 || *local_tls_type
== GOT_TLS_IE
)
3142 if (GOT_TLS_GDESC_P (*local_tls_type
))
3144 htab
->elf
.srelplt
->size
3145 += bed
->s
->sizeof_rela
;
3146 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3148 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3149 || GOT_TLS_GD_P (*local_tls_type
))
3150 srel
->size
+= bed
->s
->sizeof_rela
;
3154 *local_got
= (bfd_vma
) -1;
3158 if (htab
->tls_ld_got
.refcount
> 0)
3160 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3162 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
3163 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
3164 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3167 htab
->tls_ld_got
.offset
= -1;
3169 /* Allocate global sym .plt and .got entries, and space for global
3170 sym dynamic relocs. */
3171 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
3174 /* Allocate .plt and .got entries, and space for local symbols. */
3175 htab_traverse (htab
->loc_hash_table
,
3176 elf_x86_64_allocate_local_dynrelocs
,
3179 /* For every jump slot reserved in the sgotplt, reloc_count is
3180 incremented. However, when we reserve space for TLS descriptors,
3181 it's not incremented, so in order to compute the space reserved
3182 for them, it suffices to multiply the reloc count by the jump
3185 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3186 so that R_X86_64_IRELATIVE entries come last. */
3187 if (htab
->elf
.srelplt
)
3189 htab
->sgotplt_jump_table_size
3190 = elf_x86_64_compute_jump_table_size (htab
);
3191 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3193 else if (htab
->elf
.irelplt
)
3194 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3196 if (htab
->tlsdesc_plt
)
3198 /* If we're not using lazy TLS relocations, don't generate the
3199 PLT and GOT entries they require. */
3200 if ((info
->flags
& DF_BIND_NOW
))
3201 htab
->tlsdesc_plt
= 0;
3204 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
3205 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
3206 /* Reserve room for the initial entry.
3207 FIXME: we could probably do away with it in this case. */
3208 if (htab
->elf
.splt
->size
== 0)
3209 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3210 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
3211 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3215 if (htab
->elf
.sgotplt
)
3217 /* Don't allocate .got.plt section if there are no GOT nor PLT
3218 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3219 if ((htab
->elf
.hgot
== NULL
3220 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3221 && (htab
->elf
.sgotplt
->size
3222 == get_elf_backend_data (output_bfd
)->got_header_size
)
3223 && (htab
->elf
.splt
== NULL
3224 || htab
->elf
.splt
->size
== 0)
3225 && (htab
->elf
.sgot
== NULL
3226 || htab
->elf
.sgot
->size
== 0)
3227 && (htab
->elf
.iplt
== NULL
3228 || htab
->elf
.iplt
->size
== 0)
3229 && (htab
->elf
.igotplt
== NULL
3230 || htab
->elf
.igotplt
->size
== 0))
3231 htab
->elf
.sgotplt
->size
= 0;
3234 if (htab
->plt_eh_frame
!= NULL
3235 && htab
->elf
.splt
!= NULL
3236 && htab
->elf
.splt
->size
!= 0
3237 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3238 && _bfd_elf_eh_frame_present (info
))
3240 const struct elf_x86_64_backend_data
*arch_data
3241 = get_elf_x86_64_arch_data (bed
);
3242 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
3245 /* We now have determined the sizes of the various dynamic sections.
3246 Allocate memory for them. */
3248 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3250 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3253 if (s
== htab
->elf
.splt
3254 || s
== htab
->elf
.sgot
3255 || s
== htab
->elf
.sgotplt
3256 || s
== htab
->elf
.iplt
3257 || s
== htab
->elf
.igotplt
3258 || s
== htab
->plt_bnd
3259 || s
== htab
->plt_got
3260 || s
== htab
->plt_eh_frame
3261 || s
== htab
->sdynbss
)
3263 /* Strip this section if we don't need it; see the
3266 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
3268 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3271 /* We use the reloc_count field as a counter if we need
3272 to copy relocs into the output file. */
3273 if (s
!= htab
->elf
.srelplt
)
3278 /* It's not one of our sections, so don't allocate space. */
3284 /* If we don't need this section, strip it from the
3285 output file. This is mostly to handle .rela.bss and
3286 .rela.plt. We must create both sections in
3287 create_dynamic_sections, because they must be created
3288 before the linker maps input sections to output
3289 sections. The linker does that before
3290 adjust_dynamic_symbol is called, and it is that
3291 function which decides whether anything needs to go
3292 into these sections. */
3294 s
->flags
|= SEC_EXCLUDE
;
3298 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3301 /* Allocate memory for the section contents. We use bfd_zalloc
3302 here in case unused entries are not reclaimed before the
3303 section's contents are written out. This should not happen,
3304 but this way if it does, we get a R_X86_64_NONE reloc instead
3306 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3307 if (s
->contents
== NULL
)
3311 if (htab
->plt_eh_frame
!= NULL
3312 && htab
->plt_eh_frame
->contents
!= NULL
)
3314 const struct elf_x86_64_backend_data
*arch_data
3315 = get_elf_x86_64_arch_data (bed
);
3317 memcpy (htab
->plt_eh_frame
->contents
,
3318 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3319 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3320 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3323 if (htab
->elf
.dynamic_sections_created
)
3325 /* Add some entries to the .dynamic section. We fill in the
3326 values later, in elf_x86_64_finish_dynamic_sections, but we
3327 must add the entries now so that we get the correct size for
3328 the .dynamic section. The DT_DEBUG entry is filled in by the
3329 dynamic linker and used by the debugger. */
3330 #define add_dynamic_entry(TAG, VAL) \
3331 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3333 if (info
->executable
)
3335 if (!add_dynamic_entry (DT_DEBUG
, 0))
3339 if (htab
->elf
.splt
->size
!= 0)
3341 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3342 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3343 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3344 || !add_dynamic_entry (DT_JMPREL
, 0))
3347 if (htab
->tlsdesc_plt
3348 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3349 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3355 if (!add_dynamic_entry (DT_RELA
, 0)
3356 || !add_dynamic_entry (DT_RELASZ
, 0)
3357 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3360 /* If any dynamic relocs apply to a read-only section,
3361 then we need a DT_TEXTREL entry. */
3362 if ((info
->flags
& DF_TEXTREL
) == 0)
3363 elf_link_hash_traverse (&htab
->elf
,
3364 elf_x86_64_readonly_dynrelocs
,
3367 if ((info
->flags
& DF_TEXTREL
) != 0)
3369 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3374 #undef add_dynamic_entry
3380 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3381 struct bfd_link_info
*info
)
3383 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3387 struct elf_link_hash_entry
*tlsbase
;
3389 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3390 "_TLS_MODULE_BASE_",
3391 FALSE
, FALSE
, FALSE
);
3393 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3395 struct elf_x86_64_link_hash_table
*htab
;
3396 struct bfd_link_hash_entry
*bh
= NULL
;
3397 const struct elf_backend_data
*bed
3398 = get_elf_backend_data (output_bfd
);
3400 htab
= elf_x86_64_hash_table (info
);
3404 if (!(_bfd_generic_link_add_one_symbol
3405 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3406 tls_sec
, 0, NULL
, FALSE
,
3407 bed
->collect
, &bh
)))
3410 htab
->tls_module_base
= bh
;
3412 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3413 tlsbase
->def_regular
= 1;
3414 tlsbase
->other
= STV_HIDDEN
;
3415 tlsbase
->root
.linker_def
= 1;
3416 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3423 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3424 executables. Rather than setting it to the beginning of the TLS
3425 section, we have to set it to the end. This function may be called
3426 multiple times, it is idempotent. */
3429 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3431 struct elf_x86_64_link_hash_table
*htab
;
3432 struct bfd_link_hash_entry
*base
;
3434 if (!info
->executable
)
3437 htab
= elf_x86_64_hash_table (info
);
3441 base
= htab
->tls_module_base
;
3445 base
->u
.def
.value
= htab
->elf
.tls_size
;
3448 /* Return the base VMA address which should be subtracted from real addresses
3449 when resolving @dtpoff relocation.
3450 This is PT_TLS segment p_vaddr. */
3453 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3455 /* If tls_sec is NULL, we should have signalled an error already. */
3456 if (elf_hash_table (info
)->tls_sec
== NULL
)
3458 return elf_hash_table (info
)->tls_sec
->vma
;
3461 /* Return the relocation value for @tpoff relocation
3462 if STT_TLS virtual address is ADDRESS. */
3465 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3467 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3468 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3469 bfd_vma static_tls_size
;
3471 /* If tls_segment is NULL, we should have signalled an error already. */
3472 if (htab
->tls_sec
== NULL
)
3475 /* Consider special static TLS alignment requirements. */
3476 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3477 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3480 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3484 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3486 /* Opcode Instruction
3489 0x0f 0x8x conditional jump */
3491 && (contents
[offset
- 1] == 0xe8
3492 || contents
[offset
- 1] == 0xe9))
3494 && contents
[offset
- 2] == 0x0f
3495 && (contents
[offset
- 1] & 0xf0) == 0x80));
3498 /* Relocate an x86_64 ELF section. */
3501 elf_x86_64_relocate_section (bfd
*output_bfd
,
3502 struct bfd_link_info
*info
,
3504 asection
*input_section
,
3506 Elf_Internal_Rela
*relocs
,
3507 Elf_Internal_Sym
*local_syms
,
3508 asection
**local_sections
)
3510 struct elf_x86_64_link_hash_table
*htab
;
3511 Elf_Internal_Shdr
*symtab_hdr
;
3512 struct elf_link_hash_entry
**sym_hashes
;
3513 bfd_vma
*local_got_offsets
;
3514 bfd_vma
*local_tlsdesc_gotents
;
3515 Elf_Internal_Rela
*rel
;
3516 Elf_Internal_Rela
*relend
;
3517 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3519 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3521 htab
= elf_x86_64_hash_table (info
);
3524 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3525 sym_hashes
= elf_sym_hashes (input_bfd
);
3526 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3527 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3529 elf_x86_64_set_tls_module_base (info
);
3532 relend
= relocs
+ input_section
->reloc_count
;
3533 for (; rel
< relend
; rel
++)
3535 unsigned int r_type
;
3536 reloc_howto_type
*howto
;
3537 unsigned long r_symndx
;
3538 struct elf_link_hash_entry
*h
;
3539 struct elf_x86_64_link_hash_entry
*eh
;
3540 Elf_Internal_Sym
*sym
;
3542 bfd_vma off
, offplt
, plt_offset
;
3544 bfd_boolean unresolved_reloc
;
3545 bfd_reloc_status_type r
;
3547 asection
*base_got
, *resolved_plt
;
3550 r_type
= ELF32_R_TYPE (rel
->r_info
);
3551 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3552 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3555 if (r_type
>= (int) R_X86_64_standard
)
3557 (*_bfd_error_handler
)
3558 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3559 input_bfd
, input_section
, r_type
);
3560 bfd_set_error (bfd_error_bad_value
);
3564 if (r_type
!= (int) R_X86_64_32
3565 || ABI_64_P (output_bfd
))
3566 howto
= x86_64_elf_howto_table
+ r_type
;
3568 howto
= (x86_64_elf_howto_table
3569 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3570 r_symndx
= htab
->r_sym (rel
->r_info
);
3574 unresolved_reloc
= FALSE
;
3575 if (r_symndx
< symtab_hdr
->sh_info
)
3577 sym
= local_syms
+ r_symndx
;
3578 sec
= local_sections
[r_symndx
];
3580 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3582 st_size
= sym
->st_size
;
3584 /* Relocate against local STT_GNU_IFUNC symbol. */
3585 if (!info
->relocatable
3586 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3588 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3593 /* Set STT_GNU_IFUNC symbol value. */
3594 h
->root
.u
.def
.value
= sym
->st_value
;
3595 h
->root
.u
.def
.section
= sec
;
3600 bfd_boolean warned ATTRIBUTE_UNUSED
;
3601 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3603 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3604 r_symndx
, symtab_hdr
, sym_hashes
,
3606 unresolved_reloc
, warned
, ignored
);
3610 if (sec
!= NULL
&& discarded_section (sec
))
3611 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3612 rel
, 1, relend
, howto
, 0, contents
);
3614 if (info
->relocatable
)
3617 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3619 if (r_type
== R_X86_64_64
)
3621 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3622 zero-extend it to 64bit if addend is zero. */
3623 r_type
= R_X86_64_32
;
3624 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3626 else if (r_type
== R_X86_64_SIZE64
)
3628 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3629 zero-extend it to 64bit if addend is zero. */
3630 r_type
= R_X86_64_SIZE32
;
3631 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3635 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3637 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3638 it here if it is defined in a non-shared object. */
3640 && h
->type
== STT_GNU_IFUNC
3646 if ((input_section
->flags
& SEC_ALLOC
) == 0
3647 || h
->plt
.offset
== (bfd_vma
) -1)
3650 /* STT_GNU_IFUNC symbol must go through PLT. */
3651 if (htab
->elf
.splt
!= NULL
)
3653 if (htab
->plt_bnd
!= NULL
)
3655 resolved_plt
= htab
->plt_bnd
;
3656 plt_offset
= eh
->plt_bnd
.offset
;
3660 resolved_plt
= htab
->elf
.splt
;
3661 plt_offset
= h
->plt
.offset
;
3666 resolved_plt
= htab
->elf
.iplt
;
3667 plt_offset
= h
->plt
.offset
;
3670 relocation
= (resolved_plt
->output_section
->vma
3671 + resolved_plt
->output_offset
+ plt_offset
);
3676 if (h
->root
.root
.string
)
3677 name
= h
->root
.root
.string
;
3679 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3681 (*_bfd_error_handler
)
3682 (_("%B: relocation %s against STT_GNU_IFUNC "
3683 "symbol `%s' isn't handled by %s"), input_bfd
,
3684 x86_64_elf_howto_table
[r_type
].name
,
3685 name
, __FUNCTION__
);
3686 bfd_set_error (bfd_error_bad_value
);
3695 if (ABI_64_P (output_bfd
))
3699 if (rel
->r_addend
!= 0)
3701 if (h
->root
.root
.string
)
3702 name
= h
->root
.root
.string
;
3704 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3706 (*_bfd_error_handler
)
3707 (_("%B: relocation %s against STT_GNU_IFUNC "
3708 "symbol `%s' has non-zero addend: %d"),
3709 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3710 name
, rel
->r_addend
);
3711 bfd_set_error (bfd_error_bad_value
);
3715 /* Generate dynamic relcoation only when there is a
3716 non-GOT reference in a shared object. */
3717 if (info
->shared
&& h
->non_got_ref
)
3719 Elf_Internal_Rela outrel
;
3722 /* Need a dynamic relocation to get the real function
3724 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3728 if (outrel
.r_offset
== (bfd_vma
) -1
3729 || outrel
.r_offset
== (bfd_vma
) -2)
3732 outrel
.r_offset
+= (input_section
->output_section
->vma
3733 + input_section
->output_offset
);
3735 if (h
->dynindx
== -1
3737 || info
->executable
)
3739 /* This symbol is resolved locally. */
3740 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3741 outrel
.r_addend
= (h
->root
.u
.def
.value
3742 + h
->root
.u
.def
.section
->output_section
->vma
3743 + h
->root
.u
.def
.section
->output_offset
);
3747 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3748 outrel
.r_addend
= 0;
3751 sreloc
= htab
->elf
.irelifunc
;
3752 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3754 /* If this reloc is against an external symbol, we
3755 do not want to fiddle with the addend. Otherwise,
3756 we need to include the symbol value so that it
3757 becomes an addend for the dynamic reloc. For an
3758 internal symbol, we have updated addend. */
3763 case R_X86_64_PC32_BND
:
3765 case R_X86_64_PLT32
:
3766 case R_X86_64_PLT32_BND
:
3769 case R_X86_64_GOTPCREL
:
3770 case R_X86_64_GOTPCREL64
:
3771 base_got
= htab
->elf
.sgot
;
3772 off
= h
->got
.offset
;
3774 if (base_got
== NULL
)
3777 if (off
== (bfd_vma
) -1)
3779 /* We can't use h->got.offset here to save state, or
3780 even just remember the offset, as finish_dynamic_symbol
3781 would use that as offset into .got. */
3783 if (htab
->elf
.splt
!= NULL
)
3785 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3786 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3787 base_got
= htab
->elf
.sgotplt
;
3791 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3792 off
= plt_index
* GOT_ENTRY_SIZE
;
3793 base_got
= htab
->elf
.igotplt
;
3796 if (h
->dynindx
== -1
3800 /* This references the local defitionion. We must
3801 initialize this entry in the global offset table.
3802 Since the offset must always be a multiple of 8,
3803 we use the least significant bit to record
3804 whether we have initialized it already.
3806 When doing a dynamic link, we create a .rela.got
3807 relocation entry to initialize the value. This
3808 is done in the finish_dynamic_symbol routine. */
3813 bfd_put_64 (output_bfd
, relocation
,
3814 base_got
->contents
+ off
);
3815 /* Note that this is harmless for the GOTPLT64
3816 case, as -1 | 1 still is -1. */
3822 relocation
= (base_got
->output_section
->vma
3823 + base_got
->output_offset
+ off
);
3829 /* When generating a shared object, the relocations handled here are
3830 copied into the output file to be resolved at run time. */
3833 case R_X86_64_GOT32
:
3834 case R_X86_64_GOT64
:
3835 /* Relocation is to the entry for this symbol in the global
3837 case R_X86_64_GOTPCREL
:
3838 case R_X86_64_GOTPCREL64
:
3839 /* Use global offset table entry as symbol value. */
3840 case R_X86_64_GOTPLT64
:
3841 /* This is obsolete and treated the the same as GOT64. */
3842 base_got
= htab
->elf
.sgot
;
3844 if (htab
->elf
.sgot
== NULL
)
3851 off
= h
->got
.offset
;
3853 && h
->plt
.offset
!= (bfd_vma
)-1
3854 && off
== (bfd_vma
)-1)
3856 /* We can't use h->got.offset here to save
3857 state, or even just remember the offset, as
3858 finish_dynamic_symbol would use that as offset into
3860 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3861 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3862 base_got
= htab
->elf
.sgotplt
;
3865 dyn
= htab
->elf
.dynamic_sections_created
;
3867 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3869 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3870 || (ELF_ST_VISIBILITY (h
->other
)
3871 && h
->root
.type
== bfd_link_hash_undefweak
))
3873 /* This is actually a static link, or it is a -Bsymbolic
3874 link and the symbol is defined locally, or the symbol
3875 was forced to be local because of a version file. We
3876 must initialize this entry in the global offset table.
3877 Since the offset must always be a multiple of 8, we
3878 use the least significant bit to record whether we
3879 have initialized it already.
3881 When doing a dynamic link, we create a .rela.got
3882 relocation entry to initialize the value. This is
3883 done in the finish_dynamic_symbol routine. */
3888 bfd_put_64 (output_bfd
, relocation
,
3889 base_got
->contents
+ off
);
3890 /* Note that this is harmless for the GOTPLT64 case,
3891 as -1 | 1 still is -1. */
3896 unresolved_reloc
= FALSE
;
3900 if (local_got_offsets
== NULL
)
3903 off
= local_got_offsets
[r_symndx
];
3905 /* The offset must always be a multiple of 8. We use
3906 the least significant bit to record whether we have
3907 already generated the necessary reloc. */
3912 bfd_put_64 (output_bfd
, relocation
,
3913 base_got
->contents
+ off
);
3918 Elf_Internal_Rela outrel
;
3920 /* We need to generate a R_X86_64_RELATIVE reloc
3921 for the dynamic linker. */
3922 s
= htab
->elf
.srelgot
;
3926 outrel
.r_offset
= (base_got
->output_section
->vma
3927 + base_got
->output_offset
3929 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3930 outrel
.r_addend
= relocation
;
3931 elf_append_rela (output_bfd
, s
, &outrel
);
3934 local_got_offsets
[r_symndx
] |= 1;
3938 if (off
>= (bfd_vma
) -2)
3941 relocation
= base_got
->output_section
->vma
3942 + base_got
->output_offset
+ off
;
3943 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
3944 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3945 - htab
->elf
.sgotplt
->output_offset
;
3949 case R_X86_64_GOTOFF64
:
3950 /* Relocation is relative to the start of the global offset
3953 /* Check to make sure it isn't a protected function or data
3954 symbol for shared library since it may not be local when
3955 used as function address or with copy relocation. We also
3956 need to make sure that a symbol is referenced locally. */
3957 if (info
->shared
&& h
)
3959 if (!h
->def_regular
)
3963 switch (ELF_ST_VISIBILITY (h
->other
))
3966 v
= _("hidden symbol");
3969 v
= _("internal symbol");
3972 v
= _("protected symbol");
3979 (*_bfd_error_handler
)
3980 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
3981 input_bfd
, v
, h
->root
.root
.string
);
3982 bfd_set_error (bfd_error_bad_value
);
3985 else if (!info
->executable
3986 && !SYMBOL_REFERENCES_LOCAL (info
, h
)
3987 && (h
->type
== STT_FUNC
3988 || h
->type
== STT_OBJECT
)
3989 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3991 (*_bfd_error_handler
)
3992 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
3994 h
->type
== STT_FUNC
? "function" : "data",
3995 h
->root
.root
.string
);
3996 bfd_set_error (bfd_error_bad_value
);
4001 /* Note that sgot is not involved in this
4002 calculation. We always want the start of .got.plt. If we
4003 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4004 permitted by the ABI, we might have to change this
4006 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4007 + htab
->elf
.sgotplt
->output_offset
;
4010 case R_X86_64_GOTPC32
:
4011 case R_X86_64_GOTPC64
:
4012 /* Use global offset table as symbol value. */
4013 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4014 + htab
->elf
.sgotplt
->output_offset
;
4015 unresolved_reloc
= FALSE
;
4018 case R_X86_64_PLTOFF64
:
4019 /* Relocation is PLT entry relative to GOT. For local
4020 symbols it's the symbol itself relative to GOT. */
4022 /* See PLT32 handling. */
4023 && h
->plt
.offset
!= (bfd_vma
) -1
4024 && htab
->elf
.splt
!= NULL
)
4026 if (htab
->plt_bnd
!= NULL
)
4028 resolved_plt
= htab
->plt_bnd
;
4029 plt_offset
= eh
->plt_bnd
.offset
;
4033 resolved_plt
= htab
->elf
.splt
;
4034 plt_offset
= h
->plt
.offset
;
4037 relocation
= (resolved_plt
->output_section
->vma
4038 + resolved_plt
->output_offset
4040 unresolved_reloc
= FALSE
;
4043 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4044 + htab
->elf
.sgotplt
->output_offset
;
4047 case R_X86_64_PLT32
:
4048 case R_X86_64_PLT32_BND
:
4049 /* Relocation is to the entry for this symbol in the
4050 procedure linkage table. */
4052 /* Resolve a PLT32 reloc against a local symbol directly,
4053 without using the procedure linkage table. */
4057 if ((h
->plt
.offset
== (bfd_vma
) -1
4058 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4059 || htab
->elf
.splt
== NULL
)
4061 /* We didn't make a PLT entry for this symbol. This
4062 happens when statically linking PIC code, or when
4063 using -Bsymbolic. */
4067 if (h
->plt
.offset
!= (bfd_vma
) -1)
4069 if (htab
->plt_bnd
!= NULL
)
4071 resolved_plt
= htab
->plt_bnd
;
4072 plt_offset
= eh
->plt_bnd
.offset
;
4076 resolved_plt
= htab
->elf
.splt
;
4077 plt_offset
= h
->plt
.offset
;
4082 /* Use the GOT PLT. */
4083 resolved_plt
= htab
->plt_got
;
4084 plt_offset
= eh
->plt_got
.offset
;
4087 relocation
= (resolved_plt
->output_section
->vma
4088 + resolved_plt
->output_offset
4090 unresolved_reloc
= FALSE
;
4093 case R_X86_64_SIZE32
:
4094 case R_X86_64_SIZE64
:
4095 /* Set to symbol size. */
4096 relocation
= st_size
;
4102 case R_X86_64_PC32_BND
:
4103 /* Don't complain about -fPIC if the symbol is undefined when
4104 building executable. */
4106 && (input_section
->flags
& SEC_ALLOC
) != 0
4107 && (input_section
->flags
& SEC_READONLY
) != 0
4109 && !(info
->executable
4110 && h
->root
.type
== bfd_link_hash_undefined
))
4112 bfd_boolean fail
= FALSE
;
4114 = ((r_type
== R_X86_64_PC32
4115 || r_type
== R_X86_64_PC32_BND
)
4116 && is_32bit_relative_branch (contents
, rel
->r_offset
));
4118 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
4120 /* Symbol is referenced locally. Make sure it is
4121 defined locally or for a branch. */
4122 fail
= !h
->def_regular
&& !branch
;
4124 else if (!(info
->executable
4125 && (h
->needs_copy
|| eh
->needs_copy
)))
4127 /* Symbol doesn't need copy reloc and isn't referenced
4128 locally. We only allow branch to symbol with
4129 non-default visibility. */
4131 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
4138 const char *pic
= "";
4140 switch (ELF_ST_VISIBILITY (h
->other
))
4143 v
= _("hidden symbol");
4146 v
= _("internal symbol");
4149 v
= _("protected symbol");
4153 pic
= _("; recompile with -fPIC");
4158 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4160 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4162 (*_bfd_error_handler
) (fmt
, input_bfd
,
4163 x86_64_elf_howto_table
[r_type
].name
,
4164 v
, h
->root
.root
.string
, pic
);
4165 bfd_set_error (bfd_error_bad_value
);
4176 /* FIXME: The ABI says the linker should make sure the value is
4177 the same when it's zeroextended to 64 bit. */
4180 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4183 /* Don't copy a pc-relative relocation into the output file
4184 if the symbol needs copy reloc or the symbol is undefined
4185 when building executable. */
4187 && !(info
->executable
4191 || h
->root
.type
== bfd_link_hash_undefined
)
4192 && IS_X86_64_PCREL_TYPE (r_type
))
4194 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4195 || h
->root
.type
!= bfd_link_hash_undefweak
)
4196 && ((! IS_X86_64_PCREL_TYPE (r_type
)
4197 && r_type
!= R_X86_64_SIZE32
4198 && r_type
!= R_X86_64_SIZE64
)
4199 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
4200 || (ELIMINATE_COPY_RELOCS
4207 || h
->root
.type
== bfd_link_hash_undefweak
4208 || h
->root
.type
== bfd_link_hash_undefined
)))
4210 Elf_Internal_Rela outrel
;
4211 bfd_boolean skip
, relocate
;
4214 /* When generating a shared object, these relocations
4215 are copied into the output file to be resolved at run
4221 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4223 if (outrel
.r_offset
== (bfd_vma
) -1)
4225 else if (outrel
.r_offset
== (bfd_vma
) -2)
4226 skip
= TRUE
, relocate
= TRUE
;
4228 outrel
.r_offset
+= (input_section
->output_section
->vma
4229 + input_section
->output_offset
);
4232 memset (&outrel
, 0, sizeof outrel
);
4234 /* h->dynindx may be -1 if this symbol was marked to
4238 && (IS_X86_64_PCREL_TYPE (r_type
)
4240 || ! SYMBOLIC_BIND (info
, h
)
4241 || ! h
->def_regular
))
4243 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
4244 outrel
.r_addend
= rel
->r_addend
;
4248 /* This symbol is local, or marked to become local. */
4249 if (r_type
== htab
->pointer_r_type
)
4252 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4253 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4255 else if (r_type
== R_X86_64_64
4256 && !ABI_64_P (output_bfd
))
4259 outrel
.r_info
= htab
->r_info (0,
4260 R_X86_64_RELATIVE64
);
4261 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4262 /* Check addend overflow. */
4263 if ((outrel
.r_addend
& 0x80000000)
4264 != (rel
->r_addend
& 0x80000000))
4267 int addend
= rel
->r_addend
;
4268 if (h
&& h
->root
.root
.string
)
4269 name
= h
->root
.root
.string
;
4271 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4274 (*_bfd_error_handler
)
4275 (_("%B: addend -0x%x in relocation %s against "
4276 "symbol `%s' at 0x%lx in section `%A' is "
4278 input_bfd
, input_section
, addend
,
4279 x86_64_elf_howto_table
[r_type
].name
,
4280 name
, (unsigned long) rel
->r_offset
);
4282 (*_bfd_error_handler
)
4283 (_("%B: addend 0x%x in relocation %s against "
4284 "symbol `%s' at 0x%lx in section `%A' is "
4286 input_bfd
, input_section
, addend
,
4287 x86_64_elf_howto_table
[r_type
].name
,
4288 name
, (unsigned long) rel
->r_offset
);
4289 bfd_set_error (bfd_error_bad_value
);
4297 if (bfd_is_abs_section (sec
))
4299 else if (sec
== NULL
|| sec
->owner
== NULL
)
4301 bfd_set_error (bfd_error_bad_value
);
4308 /* We are turning this relocation into one
4309 against a section symbol. It would be
4310 proper to subtract the symbol's value,
4311 osec->vma, from the emitted reloc addend,
4312 but ld.so expects buggy relocs. */
4313 osec
= sec
->output_section
;
4314 sindx
= elf_section_data (osec
)->dynindx
;
4317 asection
*oi
= htab
->elf
.text_index_section
;
4318 sindx
= elf_section_data (oi
)->dynindx
;
4320 BFD_ASSERT (sindx
!= 0);
4323 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
4324 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4328 sreloc
= elf_section_data (input_section
)->sreloc
;
4330 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4332 r
= bfd_reloc_notsupported
;
4333 goto check_relocation_error
;
4336 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4338 /* If this reloc is against an external symbol, we do
4339 not want to fiddle with the addend. Otherwise, we
4340 need to include the symbol value so that it becomes
4341 an addend for the dynamic reloc. */
4348 case R_X86_64_TLSGD
:
4349 case R_X86_64_GOTPC32_TLSDESC
:
4350 case R_X86_64_TLSDESC_CALL
:
4351 case R_X86_64_GOTTPOFF
:
4352 tls_type
= GOT_UNKNOWN
;
4353 if (h
== NULL
&& local_got_offsets
)
4354 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
4356 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
4358 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4359 input_section
, contents
,
4360 symtab_hdr
, sym_hashes
,
4361 &r_type
, tls_type
, rel
,
4362 relend
, h
, r_symndx
))
4365 if (r_type
== R_X86_64_TPOFF32
)
4367 bfd_vma roff
= rel
->r_offset
;
4369 BFD_ASSERT (! unresolved_reloc
);
4371 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4373 /* GD->LE transition. For 64bit, change
4374 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4375 .word 0x6666; rex64; call __tls_get_addr
4378 leaq foo@tpoff(%rax), %rax
4380 leaq foo@tlsgd(%rip), %rdi
4381 .word 0x6666; rex64; call __tls_get_addr
4384 leaq foo@tpoff(%rax), %rax
4385 For largepic, change:
4386 leaq foo@tlsgd(%rip), %rdi
4387 movabsq $__tls_get_addr@pltoff, %rax
4392 leaq foo@tpoff(%rax), %rax
4393 nopw 0x0(%rax,%rax,1) */
4395 if (ABI_64_P (output_bfd
)
4396 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4398 memcpy (contents
+ roff
- 3,
4399 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4400 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4403 else if (ABI_64_P (output_bfd
))
4404 memcpy (contents
+ roff
- 4,
4405 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4408 memcpy (contents
+ roff
- 3,
4409 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4411 bfd_put_32 (output_bfd
,
4412 elf_x86_64_tpoff (info
, relocation
),
4413 contents
+ roff
+ 8 + largepic
);
4414 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4418 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4420 /* GDesc -> LE transition.
4421 It's originally something like:
4422 leaq x@tlsdesc(%rip), %rax
4425 movl $x@tpoff, %rax. */
4427 unsigned int val
, type
;
4429 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4430 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4431 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4432 contents
+ roff
- 3);
4433 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4434 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4435 contents
+ roff
- 1);
4436 bfd_put_32 (output_bfd
,
4437 elf_x86_64_tpoff (info
, relocation
),
4441 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4443 /* GDesc -> LE transition.
4448 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4449 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4452 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4454 /* IE->LE transition:
4455 For 64bit, originally it can be one of:
4456 movq foo@gottpoff(%rip), %reg
4457 addq foo@gottpoff(%rip), %reg
4460 leaq foo(%reg), %reg
4462 For 32bit, originally it can be one of:
4463 movq foo@gottpoff(%rip), %reg
4464 addl foo@gottpoff(%rip), %reg
4467 leal foo(%reg), %reg
4470 unsigned int val
, type
, reg
;
4473 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4476 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4477 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4483 bfd_put_8 (output_bfd
, 0x49,
4484 contents
+ roff
- 3);
4485 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4486 bfd_put_8 (output_bfd
, 0x41,
4487 contents
+ roff
- 3);
4488 bfd_put_8 (output_bfd
, 0xc7,
4489 contents
+ roff
- 2);
4490 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4491 contents
+ roff
- 1);
4495 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4498 bfd_put_8 (output_bfd
, 0x49,
4499 contents
+ roff
- 3);
4500 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4501 bfd_put_8 (output_bfd
, 0x41,
4502 contents
+ roff
- 3);
4503 bfd_put_8 (output_bfd
, 0x81,
4504 contents
+ roff
- 2);
4505 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4506 contents
+ roff
- 1);
4510 /* addq/addl -> leaq/leal */
4512 bfd_put_8 (output_bfd
, 0x4d,
4513 contents
+ roff
- 3);
4514 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4515 bfd_put_8 (output_bfd
, 0x45,
4516 contents
+ roff
- 3);
4517 bfd_put_8 (output_bfd
, 0x8d,
4518 contents
+ roff
- 2);
4519 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4520 contents
+ roff
- 1);
4522 bfd_put_32 (output_bfd
,
4523 elf_x86_64_tpoff (info
, relocation
),
4531 if (htab
->elf
.sgot
== NULL
)
4536 off
= h
->got
.offset
;
4537 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4541 if (local_got_offsets
== NULL
)
4544 off
= local_got_offsets
[r_symndx
];
4545 offplt
= local_tlsdesc_gotents
[r_symndx
];
4552 Elf_Internal_Rela outrel
;
4556 if (htab
->elf
.srelgot
== NULL
)
4559 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4561 if (GOT_TLS_GDESC_P (tls_type
))
4563 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4564 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4565 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4566 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4567 + htab
->elf
.sgotplt
->output_offset
4569 + htab
->sgotplt_jump_table_size
);
4570 sreloc
= htab
->elf
.srelplt
;
4572 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4574 outrel
.r_addend
= 0;
4575 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4578 sreloc
= htab
->elf
.srelgot
;
4580 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4581 + htab
->elf
.sgot
->output_offset
+ off
);
4583 if (GOT_TLS_GD_P (tls_type
))
4584 dr_type
= R_X86_64_DTPMOD64
;
4585 else if (GOT_TLS_GDESC_P (tls_type
))
4588 dr_type
= R_X86_64_TPOFF64
;
4590 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4591 outrel
.r_addend
= 0;
4592 if ((dr_type
== R_X86_64_TPOFF64
4593 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4594 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4595 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4597 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4599 if (GOT_TLS_GD_P (tls_type
))
4603 BFD_ASSERT (! unresolved_reloc
);
4604 bfd_put_64 (output_bfd
,
4605 relocation
- elf_x86_64_dtpoff_base (info
),
4606 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4610 bfd_put_64 (output_bfd
, 0,
4611 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4612 outrel
.r_info
= htab
->r_info (indx
,
4614 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4615 elf_append_rela (output_bfd
, sreloc
,
4624 local_got_offsets
[r_symndx
] |= 1;
4627 if (off
>= (bfd_vma
) -2
4628 && ! GOT_TLS_GDESC_P (tls_type
))
4630 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4632 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4633 || r_type
== R_X86_64_TLSDESC_CALL
)
4634 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4635 + htab
->elf
.sgotplt
->output_offset
4636 + offplt
+ htab
->sgotplt_jump_table_size
;
4638 relocation
= htab
->elf
.sgot
->output_section
->vma
4639 + htab
->elf
.sgot
->output_offset
+ off
;
4640 unresolved_reloc
= FALSE
;
4644 bfd_vma roff
= rel
->r_offset
;
4646 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4648 /* GD->IE transition. For 64bit, change
4649 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4650 .word 0x6666; rex64; call __tls_get_addr@plt
4653 addq foo@gottpoff(%rip), %rax
4655 leaq foo@tlsgd(%rip), %rdi
4656 .word 0x6666; rex64; call __tls_get_addr@plt
4659 addq foo@gottpoff(%rip), %rax
4660 For largepic, change:
4661 leaq foo@tlsgd(%rip), %rdi
4662 movabsq $__tls_get_addr@pltoff, %rax
4667 addq foo@gottpoff(%rax), %rax
4668 nopw 0x0(%rax,%rax,1) */
4670 if (ABI_64_P (output_bfd
)
4671 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4673 memcpy (contents
+ roff
- 3,
4674 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4675 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4678 else if (ABI_64_P (output_bfd
))
4679 memcpy (contents
+ roff
- 4,
4680 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4683 memcpy (contents
+ roff
- 3,
4684 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4687 relocation
= (htab
->elf
.sgot
->output_section
->vma
4688 + htab
->elf
.sgot
->output_offset
+ off
4691 - input_section
->output_section
->vma
4692 - input_section
->output_offset
4694 bfd_put_32 (output_bfd
, relocation
,
4695 contents
+ roff
+ 8 + largepic
);
4696 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4700 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4702 /* GDesc -> IE transition.
4703 It's originally something like:
4704 leaq x@tlsdesc(%rip), %rax
4707 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4709 /* Now modify the instruction as appropriate. To
4710 turn a leaq into a movq in the form we use it, it
4711 suffices to change the second byte from 0x8d to
4713 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4715 bfd_put_32 (output_bfd
,
4716 htab
->elf
.sgot
->output_section
->vma
4717 + htab
->elf
.sgot
->output_offset
+ off
4719 - input_section
->output_section
->vma
4720 - input_section
->output_offset
4725 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4727 /* GDesc -> IE transition.
4734 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4735 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4743 case R_X86_64_TLSLD
:
4744 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4745 input_section
, contents
,
4746 symtab_hdr
, sym_hashes
,
4747 &r_type
, GOT_UNKNOWN
,
4748 rel
, relend
, h
, r_symndx
))
4751 if (r_type
!= R_X86_64_TLSLD
)
4753 /* LD->LE transition:
4754 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4755 For 64bit, we change it into:
4756 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4757 For 32bit, we change it into:
4758 nopl 0x0(%rax); movl %fs:0, %eax.
4759 For largepic, change:
4760 leaq foo@tlsgd(%rip), %rdi
4761 movabsq $__tls_get_addr@pltoff, %rax
4765 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4768 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4769 if (ABI_64_P (output_bfd
)
4770 && contents
[rel
->r_offset
+ 5] == (bfd_byte
) '\xb8')
4771 memcpy (contents
+ rel
->r_offset
- 3,
4772 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4773 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4774 else if (ABI_64_P (output_bfd
))
4775 memcpy (contents
+ rel
->r_offset
- 3,
4776 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4778 memcpy (contents
+ rel
->r_offset
- 3,
4779 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4780 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4785 if (htab
->elf
.sgot
== NULL
)
4788 off
= htab
->tls_ld_got
.offset
;
4793 Elf_Internal_Rela outrel
;
4795 if (htab
->elf
.srelgot
== NULL
)
4798 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4799 + htab
->elf
.sgot
->output_offset
+ off
);
4801 bfd_put_64 (output_bfd
, 0,
4802 htab
->elf
.sgot
->contents
+ off
);
4803 bfd_put_64 (output_bfd
, 0,
4804 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4805 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4806 outrel
.r_addend
= 0;
4807 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4809 htab
->tls_ld_got
.offset
|= 1;
4811 relocation
= htab
->elf
.sgot
->output_section
->vma
4812 + htab
->elf
.sgot
->output_offset
+ off
;
4813 unresolved_reloc
= FALSE
;
4816 case R_X86_64_DTPOFF32
:
4817 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4818 relocation
-= elf_x86_64_dtpoff_base (info
);
4820 relocation
= elf_x86_64_tpoff (info
, relocation
);
4823 case R_X86_64_TPOFF32
:
4824 case R_X86_64_TPOFF64
:
4825 BFD_ASSERT (info
->executable
);
4826 relocation
= elf_x86_64_tpoff (info
, relocation
);
4829 case R_X86_64_DTPOFF64
:
4830 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4831 relocation
-= elf_x86_64_dtpoff_base (info
);
4838 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4839 because such sections are not SEC_ALLOC and thus ld.so will
4840 not process them. */
4841 if (unresolved_reloc
4842 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4844 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4845 rel
->r_offset
) != (bfd_vma
) -1)
4847 (*_bfd_error_handler
)
4848 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4851 (long) rel
->r_offset
,
4853 h
->root
.root
.string
);
4858 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4859 contents
, rel
->r_offset
,
4860 relocation
, rel
->r_addend
);
4862 check_relocation_error
:
4863 if (r
!= bfd_reloc_ok
)
4868 name
= h
->root
.root
.string
;
4871 name
= bfd_elf_string_from_elf_section (input_bfd
,
4872 symtab_hdr
->sh_link
,
4877 name
= bfd_section_name (input_bfd
, sec
);
4880 if (r
== bfd_reloc_overflow
)
4882 if (! ((*info
->callbacks
->reloc_overflow
)
4883 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4884 (bfd_vma
) 0, input_bfd
, input_section
,
4890 (*_bfd_error_handler
)
4891 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4892 input_bfd
, input_section
,
4893 (long) rel
->r_offset
, name
, (int) r
);
4902 /* Finish up dynamic symbol handling. We set the contents of various
4903 dynamic sections here. */
4906 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4907 struct bfd_link_info
*info
,
4908 struct elf_link_hash_entry
*h
,
4909 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4911 struct elf_x86_64_link_hash_table
*htab
;
4912 const struct elf_x86_64_backend_data
*abed
;
4913 bfd_boolean use_plt_bnd
;
4914 struct elf_x86_64_link_hash_entry
*eh
;
4916 htab
= elf_x86_64_hash_table (info
);
4920 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
4921 section only if there is .plt section. */
4922 use_plt_bnd
= htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
;
4924 ? &elf_x86_64_bnd_arch_bed
4925 : get_elf_x86_64_backend_data (output_bfd
));
4927 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
4929 if (h
->plt
.offset
!= (bfd_vma
) -1)
4932 bfd_vma got_offset
, plt_offset
, plt_plt_offset
, plt_got_offset
;
4933 bfd_vma plt_plt_insn_end
, plt_got_insn_size
;
4934 Elf_Internal_Rela rela
;
4936 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
4937 const struct elf_backend_data
*bed
;
4938 bfd_vma plt_got_pcrel_offset
;
4940 /* When building a static executable, use .iplt, .igot.plt and
4941 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4942 if (htab
->elf
.splt
!= NULL
)
4944 plt
= htab
->elf
.splt
;
4945 gotplt
= htab
->elf
.sgotplt
;
4946 relplt
= htab
->elf
.srelplt
;
4950 plt
= htab
->elf
.iplt
;
4951 gotplt
= htab
->elf
.igotplt
;
4952 relplt
= htab
->elf
.irelplt
;
4955 /* This symbol has an entry in the procedure linkage table. Set
4957 if ((h
->dynindx
== -1
4958 && !((h
->forced_local
|| info
->executable
)
4960 && h
->type
== STT_GNU_IFUNC
))
4966 /* Get the index in the procedure linkage table which
4967 corresponds to this symbol. This is the index of this symbol
4968 in all the symbols for which we are making plt entries. The
4969 first entry in the procedure linkage table is reserved.
4971 Get the offset into the .got table of the entry that
4972 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4973 bytes. The first three are reserved for the dynamic linker.
4975 For static executables, we don't reserve anything. */
4977 if (plt
== htab
->elf
.splt
)
4979 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
4980 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4984 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
4985 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4988 plt_plt_insn_end
= abed
->plt_plt_insn_end
;
4989 plt_plt_offset
= abed
->plt_plt_offset
;
4990 plt_got_insn_size
= abed
->plt_got_insn_size
;
4991 plt_got_offset
= abed
->plt_got_offset
;
4994 /* Use the second PLT with BND relocations. */
4995 const bfd_byte
*plt_entry
, *plt2_entry
;
4997 if (eh
->has_bnd_reloc
)
4999 plt_entry
= elf_x86_64_bnd_plt_entry
;
5000 plt2_entry
= elf_x86_64_bnd_plt2_entry
;
5004 plt_entry
= elf_x86_64_legacy_plt_entry
;
5005 plt2_entry
= elf_x86_64_legacy_plt2_entry
;
5007 /* Subtract 1 since there is no BND prefix. */
5008 plt_plt_insn_end
-= 1;
5009 plt_plt_offset
-= 1;
5010 plt_got_insn_size
-= 1;
5011 plt_got_offset
-= 1;
5014 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry
)
5015 == sizeof (elf_x86_64_legacy_plt_entry
));
5017 /* Fill in the entry in the procedure linkage table. */
5018 memcpy (plt
->contents
+ h
->plt
.offset
,
5019 plt_entry
, sizeof (elf_x86_64_legacy_plt_entry
));
5020 /* Fill in the entry in the second PLT. */
5021 memcpy (htab
->plt_bnd
->contents
+ eh
->plt_bnd
.offset
,
5022 plt2_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5024 resolved_plt
= htab
->plt_bnd
;
5025 plt_offset
= eh
->plt_bnd
.offset
;
5029 /* Fill in the entry in the procedure linkage table. */
5030 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
5031 abed
->plt_entry_size
);
5034 plt_offset
= h
->plt
.offset
;
5037 /* Insert the relocation positions of the plt section. */
5039 /* Put offset the PC-relative instruction referring to the GOT entry,
5040 subtracting the size of that instruction. */
5041 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
5042 + gotplt
->output_offset
5044 - resolved_plt
->output_section
->vma
5045 - resolved_plt
->output_offset
5047 - plt_got_insn_size
);
5049 /* Check PC-relative offset overflow in PLT entry. */
5050 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
5051 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5052 output_bfd
, h
->root
.root
.string
);
5054 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
5055 resolved_plt
->contents
+ plt_offset
+ plt_got_offset
);
5057 /* Fill in the entry in the global offset table, initially this
5058 points to the second part of the PLT entry. */
5059 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5060 + plt
->output_offset
5061 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
5062 gotplt
->contents
+ got_offset
);
5064 /* Fill in the entry in the .rela.plt section. */
5065 rela
.r_offset
= (gotplt
->output_section
->vma
5066 + gotplt
->output_offset
5068 if (h
->dynindx
== -1
5069 || ((info
->executable
5070 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5072 && h
->type
== STT_GNU_IFUNC
))
5074 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5075 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5076 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
5077 rela
.r_addend
= (h
->root
.u
.def
.value
5078 + h
->root
.u
.def
.section
->output_section
->vma
5079 + h
->root
.u
.def
.section
->output_offset
);
5080 /* R_X86_64_IRELATIVE comes last. */
5081 plt_index
= htab
->next_irelative_index
--;
5085 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
5087 plt_index
= htab
->next_jump_slot_index
++;
5090 /* Don't fill PLT entry for static executables. */
5091 if (plt
== htab
->elf
.splt
)
5093 bfd_vma plt0_offset
= h
->plt
.offset
+ plt_plt_insn_end
;
5095 /* Put relocation index. */
5096 bfd_put_32 (output_bfd
, plt_index
,
5097 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
5099 /* Put offset for jmp .PLT0 and check for overflow. We don't
5100 check relocation index for overflow since branch displacement
5101 will overflow first. */
5102 if (plt0_offset
> 0x80000000)
5103 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5104 output_bfd
, h
->root
.root
.string
);
5105 bfd_put_32 (output_bfd
, - plt0_offset
,
5106 plt
->contents
+ h
->plt
.offset
+ plt_plt_offset
);
5109 bed
= get_elf_backend_data (output_bfd
);
5110 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
5111 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
5113 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5115 bfd_vma got_offset
, plt_offset
, plt_got_offset
, plt_got_insn_size
;
5116 asection
*plt
, *got
;
5117 bfd_boolean got_after_plt
;
5118 int32_t got_pcrel_offset
;
5119 const bfd_byte
*got_plt_entry
;
5121 /* Set the entry in the GOT procedure linkage table. */
5122 plt
= htab
->plt_got
;
5123 got
= htab
->elf
.sgot
;
5124 got_offset
= h
->got
.offset
;
5126 if (got_offset
== (bfd_vma
) -1
5127 || h
->type
== STT_GNU_IFUNC
5132 /* Use the second PLT entry template for the GOT PLT since they
5133 are the identical. */
5134 plt_got_insn_size
= elf_x86_64_bnd_arch_bed
.plt_got_insn_size
;
5135 plt_got_offset
= elf_x86_64_bnd_arch_bed
.plt_got_offset
;
5136 if (eh
->has_bnd_reloc
)
5137 got_plt_entry
= elf_x86_64_bnd_plt2_entry
;
5140 got_plt_entry
= elf_x86_64_legacy_plt2_entry
;
5142 /* Subtract 1 since there is no BND prefix. */
5143 plt_got_insn_size
-= 1;
5144 plt_got_offset
-= 1;
5147 /* Fill in the entry in the GOT procedure linkage table. */
5148 plt_offset
= eh
->plt_got
.offset
;
5149 memcpy (plt
->contents
+ plt_offset
,
5150 got_plt_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5152 /* Put offset the PC-relative instruction referring to the GOT
5153 entry, subtracting the size of that instruction. */
5154 got_pcrel_offset
= (got
->output_section
->vma
5155 + got
->output_offset
5157 - plt
->output_section
->vma
5158 - plt
->output_offset
5160 - plt_got_insn_size
);
5162 /* Check PC-relative offset overflow in GOT PLT entry. */
5163 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
5164 if ((got_after_plt
&& got_pcrel_offset
< 0)
5165 || (!got_after_plt
&& got_pcrel_offset
> 0))
5166 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5167 output_bfd
, h
->root
.root
.string
);
5169 bfd_put_32 (output_bfd
, got_pcrel_offset
,
5170 plt
->contents
+ plt_offset
+ plt_got_offset
);
5174 && (h
->plt
.offset
!= (bfd_vma
) -1
5175 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5177 /* Mark the symbol as undefined, rather than as defined in
5178 the .plt section. Leave the value if there were any
5179 relocations where pointer equality matters (this is a clue
5180 for the dynamic linker, to make function pointer
5181 comparisons work between an application and shared
5182 library), otherwise set it to zero. If a function is only
5183 called from a binary, there is no need to slow down
5184 shared libraries because of that. */
5185 sym
->st_shndx
= SHN_UNDEF
;
5186 if (!h
->pointer_equality_needed
)
5190 if (h
->got
.offset
!= (bfd_vma
) -1
5191 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
5192 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
5194 Elf_Internal_Rela rela
;
5196 /* This symbol has an entry in the global offset table. Set it
5198 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5201 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5202 + htab
->elf
.sgot
->output_offset
5203 + (h
->got
.offset
&~ (bfd_vma
) 1));
5205 /* If this is a static link, or it is a -Bsymbolic link and the
5206 symbol is defined locally or was forced to be local because
5207 of a version file, we just want to emit a RELATIVE reloc.
5208 The entry in the global offset table will already have been
5209 initialized in the relocate_section function. */
5211 && h
->type
== STT_GNU_IFUNC
)
5215 /* Generate R_X86_64_GLOB_DAT. */
5222 if (!h
->pointer_equality_needed
)
5225 /* For non-shared object, we can't use .got.plt, which
5226 contains the real function addres if we need pointer
5227 equality. We load the GOT entry with the PLT entry. */
5228 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5229 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5230 + plt
->output_offset
5232 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5236 else if (info
->shared
5237 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5239 if (!h
->def_regular
)
5241 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5242 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
5243 rela
.r_addend
= (h
->root
.u
.def
.value
5244 + h
->root
.u
.def
.section
->output_section
->vma
5245 + h
->root
.u
.def
.section
->output_offset
);
5249 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5251 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5252 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5253 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
5257 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
5262 Elf_Internal_Rela rela
;
5264 /* This symbol needs a copy reloc. Set it up. */
5266 if (h
->dynindx
== -1
5267 || (h
->root
.type
!= bfd_link_hash_defined
5268 && h
->root
.type
!= bfd_link_hash_defweak
)
5269 || htab
->srelbss
== NULL
)
5272 rela
.r_offset
= (h
->root
.u
.def
.value
5273 + h
->root
.u
.def
.section
->output_section
->vma
5274 + h
->root
.u
.def
.section
->output_offset
);
5275 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
5277 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
5283 /* Finish up local dynamic symbol handling. We set the contents of
5284 various dynamic sections here. */
5287 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
5289 struct elf_link_hash_entry
*h
5290 = (struct elf_link_hash_entry
*) *slot
;
5291 struct bfd_link_info
*info
5292 = (struct bfd_link_info
*) inf
;
5294 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
5298 /* Used to decide how to sort relocs in an optimal manner for the
5299 dynamic linker, before writing them out. */
5301 static enum elf_reloc_type_class
5302 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5303 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5304 const Elf_Internal_Rela
*rela
)
5306 switch ((int) ELF32_R_TYPE (rela
->r_info
))
5308 case R_X86_64_RELATIVE
:
5309 case R_X86_64_RELATIVE64
:
5310 return reloc_class_relative
;
5311 case R_X86_64_JUMP_SLOT
:
5312 return reloc_class_plt
;
5314 return reloc_class_copy
;
5316 return reloc_class_normal
;
5320 /* Finish up the dynamic sections. */
5323 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
5324 struct bfd_link_info
*info
)
5326 struct elf_x86_64_link_hash_table
*htab
;
5329 const struct elf_x86_64_backend_data
*abed
;
5331 htab
= elf_x86_64_hash_table (info
);
5335 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5336 section only if there is .plt section. */
5337 abed
= (htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
5338 ? &elf_x86_64_bnd_arch_bed
5339 : get_elf_x86_64_backend_data (output_bfd
));
5341 dynobj
= htab
->elf
.dynobj
;
5342 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5344 if (htab
->elf
.dynamic_sections_created
)
5346 bfd_byte
*dyncon
, *dynconend
;
5347 const struct elf_backend_data
*bed
;
5348 bfd_size_type sizeof_dyn
;
5350 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5353 bed
= get_elf_backend_data (dynobj
);
5354 sizeof_dyn
= bed
->s
->sizeof_dyn
;
5355 dyncon
= sdyn
->contents
;
5356 dynconend
= sdyn
->contents
+ sdyn
->size
;
5357 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
5359 Elf_Internal_Dyn dyn
;
5362 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
5370 s
= htab
->elf
.sgotplt
;
5371 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5375 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
5379 s
= htab
->elf
.srelplt
->output_section
;
5380 dyn
.d_un
.d_val
= s
->size
;
5384 /* The procedure linkage table relocs (DT_JMPREL) should
5385 not be included in the overall relocs (DT_RELA).
5386 Therefore, we override the DT_RELASZ entry here to
5387 make it not include the JMPREL relocs. Since the
5388 linker script arranges for .rela.plt to follow all
5389 other relocation sections, we don't have to worry
5390 about changing the DT_RELA entry. */
5391 if (htab
->elf
.srelplt
!= NULL
)
5393 s
= htab
->elf
.srelplt
->output_section
;
5394 dyn
.d_un
.d_val
-= s
->size
;
5398 case DT_TLSDESC_PLT
:
5400 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5401 + htab
->tlsdesc_plt
;
5404 case DT_TLSDESC_GOT
:
5406 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5407 + htab
->tlsdesc_got
;
5411 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
5414 /* Fill in the special first entry in the procedure linkage table. */
5415 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5417 /* Fill in the first entry in the procedure linkage table. */
5418 memcpy (htab
->elf
.splt
->contents
,
5419 abed
->plt0_entry
, abed
->plt_entry_size
);
5420 /* Add offset for pushq GOT+8(%rip), since the instruction
5421 uses 6 bytes subtract this value. */
5422 bfd_put_32 (output_bfd
,
5423 (htab
->elf
.sgotplt
->output_section
->vma
5424 + htab
->elf
.sgotplt
->output_offset
5426 - htab
->elf
.splt
->output_section
->vma
5427 - htab
->elf
.splt
->output_offset
5429 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
5430 /* Add offset for the PC-relative instruction accessing GOT+16,
5431 subtracting the offset to the end of that instruction. */
5432 bfd_put_32 (output_bfd
,
5433 (htab
->elf
.sgotplt
->output_section
->vma
5434 + htab
->elf
.sgotplt
->output_offset
5436 - htab
->elf
.splt
->output_section
->vma
5437 - htab
->elf
.splt
->output_offset
5438 - abed
->plt0_got2_insn_end
),
5439 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
5441 elf_section_data (htab
->elf
.splt
->output_section
)
5442 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
5444 if (htab
->tlsdesc_plt
)
5446 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5447 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
5449 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
5450 abed
->plt0_entry
, abed
->plt_entry_size
);
5452 /* Add offset for pushq GOT+8(%rip), since the
5453 instruction uses 6 bytes subtract this value. */
5454 bfd_put_32 (output_bfd
,
5455 (htab
->elf
.sgotplt
->output_section
->vma
5456 + htab
->elf
.sgotplt
->output_offset
5458 - htab
->elf
.splt
->output_section
->vma
5459 - htab
->elf
.splt
->output_offset
5462 htab
->elf
.splt
->contents
5463 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
5464 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5465 where TGD stands for htab->tlsdesc_got, subtracting the offset
5466 to the end of that instruction. */
5467 bfd_put_32 (output_bfd
,
5468 (htab
->elf
.sgot
->output_section
->vma
5469 + htab
->elf
.sgot
->output_offset
5471 - htab
->elf
.splt
->output_section
->vma
5472 - htab
->elf
.splt
->output_offset
5474 - abed
->plt0_got2_insn_end
),
5475 htab
->elf
.splt
->contents
5476 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
5481 if (htab
->plt_bnd
!= NULL
)
5482 elf_section_data (htab
->plt_bnd
->output_section
)
5483 ->this_hdr
.sh_entsize
= sizeof (elf_x86_64_bnd_plt2_entry
);
5485 if (htab
->elf
.sgotplt
)
5487 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5489 (*_bfd_error_handler
)
5490 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5494 /* Fill in the first three entries in the global offset table. */
5495 if (htab
->elf
.sgotplt
->size
> 0)
5497 /* Set the first entry in the global offset table to the address of
5498 the dynamic section. */
5500 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
5502 bfd_put_64 (output_bfd
,
5503 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5504 htab
->elf
.sgotplt
->contents
);
5505 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5506 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
5507 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
5510 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
5514 /* Adjust .eh_frame for .plt section. */
5515 if (htab
->plt_eh_frame
!= NULL
5516 && htab
->plt_eh_frame
->contents
!= NULL
)
5518 if (htab
->elf
.splt
!= NULL
5519 && htab
->elf
.splt
->size
!= 0
5520 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5521 && htab
->elf
.splt
->output_section
!= NULL
5522 && htab
->plt_eh_frame
->output_section
!= NULL
)
5524 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5525 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5526 + htab
->plt_eh_frame
->output_offset
5527 + PLT_FDE_START_OFFSET
;
5528 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5529 htab
->plt_eh_frame
->contents
5530 + PLT_FDE_START_OFFSET
);
5532 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5534 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5536 htab
->plt_eh_frame
->contents
))
5541 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5542 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
5545 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5546 htab_traverse (htab
->loc_hash_table
,
5547 elf_x86_64_finish_local_dynamic_symbol
,
5553 /* Return an array of PLT entry symbol values. */
5556 elf_x86_64_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5559 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5562 bfd_vma
*plt_sym_val
;
5564 bfd_byte
*plt_contents
;
5565 const struct elf_x86_64_backend_data
*bed
;
5566 Elf_Internal_Shdr
*hdr
;
5569 /* Get the .plt section contents. PLT passed down may point to the
5570 .plt.bnd section. Make sure that PLT always points to the .plt
5572 plt_bnd
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5577 plt
= bfd_get_section_by_name (abfd
, ".plt");
5580 bed
= &elf_x86_64_bnd_arch_bed
;
5583 bed
= get_elf_x86_64_backend_data (abfd
);
5585 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5586 if (plt_contents
== NULL
)
5588 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5589 plt_contents
, 0, plt
->size
))
5592 free (plt_contents
);
5596 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5597 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5600 hdr
= &elf_section_data (relplt
)->this_hdr
;
5601 count
= relplt
->size
/ hdr
->sh_entsize
;
5603 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5604 if (plt_sym_val
== NULL
)
5607 for (i
= 0; i
< count
; i
++)
5608 plt_sym_val
[i
] = -1;
5610 plt_offset
= bed
->plt_entry_size
;
5611 p
= relplt
->relocation
;
5612 for (i
= 0; i
< count
; i
++, p
++)
5616 /* Skip unknown relocation. */
5617 if (p
->howto
== NULL
)
5620 if (p
->howto
->type
!= R_X86_64_JUMP_SLOT
5621 && p
->howto
->type
!= R_X86_64_IRELATIVE
)
5624 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5625 + bed
->plt_reloc_offset
));
5626 if (reloc_index
>= count
)
5630 /* This is the index in .plt section. */
5631 long plt_index
= plt_offset
/ bed
->plt_entry_size
;
5632 /* Store VMA + the offset in .plt.bnd section. */
5633 plt_sym_val
[reloc_index
] =
5635 + (plt_index
- 1) * sizeof (elf_x86_64_legacy_plt2_entry
));
5638 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5639 plt_offset
+= bed
->plt_entry_size
;
5642 free (plt_contents
);
5647 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5651 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
5658 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
5659 as PLT if it exists. */
5660 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5662 plt
= bfd_get_section_by_name (abfd
, ".plt");
5663 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5664 dynsymcount
, dynsyms
, ret
,
5666 elf_x86_64_get_plt_sym_val
);
5669 /* Handle an x86-64 specific section when reading an object file. This
5670 is called when elfcode.h finds a section with an unknown type. */
5673 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
5674 const char *name
, int shindex
)
5676 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
5679 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
5685 /* Hook called by the linker routine which adds symbols from an object
5686 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5690 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5691 struct bfd_link_info
*info
,
5692 Elf_Internal_Sym
*sym
,
5693 const char **namep ATTRIBUTE_UNUSED
,
5694 flagword
*flagsp ATTRIBUTE_UNUSED
,
5700 switch (sym
->st_shndx
)
5702 case SHN_X86_64_LCOMMON
:
5703 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5706 lcomm
= bfd_make_section_with_flags (abfd
,
5710 | SEC_LINKER_CREATED
));
5713 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5716 *valp
= sym
->st_size
;
5720 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5721 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5722 && (abfd
->flags
& DYNAMIC
) == 0
5723 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5724 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5730 /* Given a BFD section, try to locate the corresponding ELF section
5734 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5735 asection
*sec
, int *index_return
)
5737 if (sec
== &_bfd_elf_large_com_section
)
5739 *index_return
= SHN_X86_64_LCOMMON
;
5745 /* Process a symbol. */
5748 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5751 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5753 switch (elfsym
->internal_elf_sym
.st_shndx
)
5755 case SHN_X86_64_LCOMMON
:
5756 asym
->section
= &_bfd_elf_large_com_section
;
5757 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5758 /* Common symbol doesn't set BSF_GLOBAL. */
5759 asym
->flags
&= ~BSF_GLOBAL
;
5765 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5767 return (sym
->st_shndx
== SHN_COMMON
5768 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5772 elf_x86_64_common_section_index (asection
*sec
)
5774 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5777 return SHN_X86_64_LCOMMON
;
5781 elf_x86_64_common_section (asection
*sec
)
5783 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5784 return bfd_com_section_ptr
;
5786 return &_bfd_elf_large_com_section
;
5790 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5791 const Elf_Internal_Sym
*sym
,
5796 const asection
*oldsec
)
5798 /* A normal common symbol and a large common symbol result in a
5799 normal common symbol. We turn the large common symbol into a
5802 && h
->root
.type
== bfd_link_hash_common
5804 && bfd_is_com_section (*psec
)
5807 if (sym
->st_shndx
== SHN_COMMON
5808 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5810 h
->root
.u
.c
.p
->section
5811 = bfd_make_section_old_way (oldbfd
, "COMMON");
5812 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5814 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5815 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5816 *psec
= bfd_com_section_ptr
;
5823 elf_x86_64_additional_program_headers (bfd
*abfd
,
5824 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5829 /* Check to see if we need a large readonly segment. */
5830 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5831 if (s
&& (s
->flags
& SEC_LOAD
))
5834 /* Check to see if we need a large data segment. Since .lbss sections
5835 is placed right after the .bss section, there should be no need for
5836 a large data segment just because of .lbss. */
5837 s
= bfd_get_section_by_name (abfd
, ".ldata");
5838 if (s
&& (s
->flags
& SEC_LOAD
))
5844 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5847 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5849 if (h
->plt
.offset
!= (bfd_vma
) -1
5851 && !h
->pointer_equality_needed
)
5854 return _bfd_elf_hash_symbol (h
);
5857 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5860 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5861 const bfd_target
*output
)
5863 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5864 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5865 && _bfd_elf_relocs_compatible (input
, output
));
5868 static const struct bfd_elf_special_section
5869 elf_x86_64_special_sections
[]=
5871 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5872 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5873 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5874 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5875 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5876 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5877 { NULL
, 0, 0, 0, 0 }
5880 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5881 #define TARGET_LITTLE_NAME "elf64-x86-64"
5882 #define ELF_ARCH bfd_arch_i386
5883 #define ELF_TARGET_ID X86_64_ELF_DATA
5884 #define ELF_MACHINE_CODE EM_X86_64
5885 #define ELF_MAXPAGESIZE 0x200000
5886 #define ELF_MINPAGESIZE 0x1000
5887 #define ELF_COMMONPAGESIZE 0x1000
5889 #define elf_backend_can_gc_sections 1
5890 #define elf_backend_can_refcount 1
5891 #define elf_backend_want_got_plt 1
5892 #define elf_backend_plt_readonly 1
5893 #define elf_backend_want_plt_sym 0
5894 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5895 #define elf_backend_rela_normal 1
5896 #define elf_backend_plt_alignment 4
5897 #define elf_backend_extern_protected_data 1
5899 #define elf_info_to_howto elf_x86_64_info_to_howto
5901 #define bfd_elf64_bfd_link_hash_table_create \
5902 elf_x86_64_link_hash_table_create
5903 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5904 #define bfd_elf64_bfd_reloc_name_lookup \
5905 elf_x86_64_reloc_name_lookup
5907 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5908 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5909 #define elf_backend_check_relocs elf_x86_64_check_relocs
5910 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5911 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5912 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5913 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5914 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5915 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5916 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5917 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5919 #define elf_backend_write_core_note elf_x86_64_write_core_note
5921 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5922 #define elf_backend_relocate_section elf_x86_64_relocate_section
5923 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5924 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5925 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5926 #define elf_backend_object_p elf64_x86_64_elf_object_p
5927 #define bfd_elf64_mkobject elf_x86_64_mkobject
5928 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5930 #define elf_backend_section_from_shdr \
5931 elf_x86_64_section_from_shdr
5933 #define elf_backend_section_from_bfd_section \
5934 elf_x86_64_elf_section_from_bfd_section
5935 #define elf_backend_add_symbol_hook \
5936 elf_x86_64_add_symbol_hook
5937 #define elf_backend_symbol_processing \
5938 elf_x86_64_symbol_processing
5939 #define elf_backend_common_section_index \
5940 elf_x86_64_common_section_index
5941 #define elf_backend_common_section \
5942 elf_x86_64_common_section
5943 #define elf_backend_common_definition \
5944 elf_x86_64_common_definition
5945 #define elf_backend_merge_symbol \
5946 elf_x86_64_merge_symbol
5947 #define elf_backend_special_sections \
5948 elf_x86_64_special_sections
5949 #define elf_backend_additional_program_headers \
5950 elf_x86_64_additional_program_headers
5951 #define elf_backend_hash_symbol \
5952 elf_x86_64_hash_symbol
5954 #include "elf64-target.h"
5956 /* CloudABI support. */
5958 #undef TARGET_LITTLE_SYM
5959 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5960 #undef TARGET_LITTLE_NAME
5961 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5964 #define ELF_OSABI ELFOSABI_CLOUDABI
5967 #define elf64_bed elf64_x86_64_cloudabi_bed
5969 #include "elf64-target.h"
5971 /* FreeBSD support. */
5973 #undef TARGET_LITTLE_SYM
5974 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5975 #undef TARGET_LITTLE_NAME
5976 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5979 #define ELF_OSABI ELFOSABI_FREEBSD
5982 #define elf64_bed elf64_x86_64_fbsd_bed
5984 #include "elf64-target.h"
5986 /* Solaris 2 support. */
5988 #undef TARGET_LITTLE_SYM
5989 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5990 #undef TARGET_LITTLE_NAME
5991 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5993 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5994 objects won't be recognized. */
5998 #define elf64_bed elf64_x86_64_sol2_bed
6000 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6002 #undef elf_backend_static_tls_alignment
6003 #define elf_backend_static_tls_alignment 16
6005 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6007 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6009 #undef elf_backend_want_plt_sym
6010 #define elf_backend_want_plt_sym 1
6012 #include "elf64-target.h"
6014 /* Native Client support. */
6017 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
6019 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6020 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
6024 #undef TARGET_LITTLE_SYM
6025 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6026 #undef TARGET_LITTLE_NAME
6027 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6029 #define elf64_bed elf64_x86_64_nacl_bed
6031 #undef ELF_MAXPAGESIZE
6032 #undef ELF_MINPAGESIZE
6033 #undef ELF_COMMONPAGESIZE
6034 #define ELF_MAXPAGESIZE 0x10000
6035 #define ELF_MINPAGESIZE 0x10000
6036 #define ELF_COMMONPAGESIZE 0x10000
6038 /* Restore defaults. */
6040 #undef elf_backend_static_tls_alignment
6041 #undef elf_backend_want_plt_sym
6042 #define elf_backend_want_plt_sym 0
6044 /* NaCl uses substantially different PLT entries for the same effects. */
6046 #undef elf_backend_plt_alignment
6047 #define elf_backend_plt_alignment 5
6048 #define NACL_PLT_ENTRY_SIZE 64
6049 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6051 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
6053 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6054 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6055 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6056 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6057 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6059 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6060 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6062 /* 32 bytes of nop to pad out to the standard size. */
6063 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6064 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6065 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6066 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6067 0x66, /* excess data32 prefix */
6071 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6073 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6074 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6075 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6076 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6078 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6079 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6080 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6082 /* Lazy GOT entries point here (32-byte aligned). */
6083 0x68, /* pushq immediate */
6084 0, 0, 0, 0, /* replaced with index into relocation table. */
6085 0xe9, /* jmp relative */
6086 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6088 /* 22 bytes of nop to pad out to the standard size. */
6089 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6090 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6091 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6094 /* .eh_frame covering the .plt section. */
6096 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
6098 #if (PLT_CIE_LENGTH != 20 \
6099 || PLT_FDE_LENGTH != 36 \
6100 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6101 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6102 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6104 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6105 0, 0, 0, 0, /* CIE ID */
6106 1, /* CIE version */
6107 'z', 'R', 0, /* Augmentation string */
6108 1, /* Code alignment factor */
6109 0x78, /* Data alignment factor */
6110 16, /* Return address column */
6111 1, /* Augmentation size */
6112 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6113 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6114 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6115 DW_CFA_nop
, DW_CFA_nop
,
6117 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6118 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
6119 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6120 0, 0, 0, 0, /* .plt size goes here */
6121 0, /* Augmentation size */
6122 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
6123 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6124 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
6125 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6126 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6127 13, /* Block length */
6128 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
6129 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
6130 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6131 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
6132 DW_CFA_nop
, DW_CFA_nop
6135 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
6137 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
6138 elf_x86_64_nacl_plt_entry
, /* plt_entry */
6139 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6140 2, /* plt0_got1_offset */
6141 9, /* plt0_got2_offset */
6142 13, /* plt0_got2_insn_end */
6143 3, /* plt_got_offset */
6144 33, /* plt_reloc_offset */
6145 38, /* plt_plt_offset */
6146 7, /* plt_got_insn_size */
6147 42, /* plt_plt_insn_end */
6148 32, /* plt_lazy_offset */
6149 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
6150 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
6153 #undef elf_backend_arch_data
6154 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6156 #undef elf_backend_object_p
6157 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6158 #undef elf_backend_modify_segment_map
6159 #define elf_backend_modify_segment_map nacl_modify_segment_map
6160 #undef elf_backend_modify_program_headers
6161 #define elf_backend_modify_program_headers nacl_modify_program_headers
6162 #undef elf_backend_final_write_processing
6163 #define elf_backend_final_write_processing nacl_final_write_processing
6165 #include "elf64-target.h"
6167 /* Native Client x32 support. */
6170 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
6172 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6173 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
6177 #undef TARGET_LITTLE_SYM
6178 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6179 #undef TARGET_LITTLE_NAME
6180 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6182 #define elf32_bed elf32_x86_64_nacl_bed
6184 #define bfd_elf32_bfd_link_hash_table_create \
6185 elf_x86_64_link_hash_table_create
6186 #define bfd_elf32_bfd_reloc_type_lookup \
6187 elf_x86_64_reloc_type_lookup
6188 #define bfd_elf32_bfd_reloc_name_lookup \
6189 elf_x86_64_reloc_name_lookup
6190 #define bfd_elf32_mkobject \
6192 #define bfd_elf32_get_synthetic_symtab \
6193 elf_x86_64_get_synthetic_symtab
6195 #undef elf_backend_object_p
6196 #define elf_backend_object_p \
6197 elf32_x86_64_nacl_elf_object_p
6199 #undef elf_backend_bfd_from_remote_memory
6200 #define elf_backend_bfd_from_remote_memory \
6201 _bfd_elf32_bfd_from_remote_memory
6203 #undef elf_backend_size_info
6204 #define elf_backend_size_info \
6205 _bfd_elf32_size_info
6207 #include "elf32-target.h"
6209 /* Restore defaults. */
6210 #undef elf_backend_object_p
6211 #define elf_backend_object_p elf64_x86_64_elf_object_p
6212 #undef elf_backend_bfd_from_remote_memory
6213 #undef elf_backend_size_info
6214 #undef elf_backend_modify_segment_map
6215 #undef elf_backend_modify_program_headers
6216 #undef elf_backend_final_write_processing
6218 /* Intel L1OM support. */
6221 elf64_l1om_elf_object_p (bfd
*abfd
)
6223 /* Set the right machine number for an L1OM elf64 file. */
6224 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
6228 #undef TARGET_LITTLE_SYM
6229 #define TARGET_LITTLE_SYM l1om_elf64_vec
6230 #undef TARGET_LITTLE_NAME
6231 #define TARGET_LITTLE_NAME "elf64-l1om"
6233 #define ELF_ARCH bfd_arch_l1om
6235 #undef ELF_MACHINE_CODE
6236 #define ELF_MACHINE_CODE EM_L1OM
6241 #define elf64_bed elf64_l1om_bed
6243 #undef elf_backend_object_p
6244 #define elf_backend_object_p elf64_l1om_elf_object_p
6246 /* Restore defaults. */
6247 #undef ELF_MAXPAGESIZE
6248 #undef ELF_MINPAGESIZE
6249 #undef ELF_COMMONPAGESIZE
6250 #define ELF_MAXPAGESIZE 0x200000
6251 #define ELF_MINPAGESIZE 0x1000
6252 #define ELF_COMMONPAGESIZE 0x1000
6253 #undef elf_backend_plt_alignment
6254 #define elf_backend_plt_alignment 4
6255 #undef elf_backend_arch_data
6256 #define elf_backend_arch_data &elf_x86_64_arch_bed
6258 #include "elf64-target.h"
6260 /* FreeBSD L1OM support. */
6262 #undef TARGET_LITTLE_SYM
6263 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6264 #undef TARGET_LITTLE_NAME
6265 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6268 #define ELF_OSABI ELFOSABI_FREEBSD
6271 #define elf64_bed elf64_l1om_fbsd_bed
6273 #include "elf64-target.h"
6275 /* Intel K1OM support. */
6278 elf64_k1om_elf_object_p (bfd
*abfd
)
6280 /* Set the right machine number for an K1OM elf64 file. */
6281 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
6285 #undef TARGET_LITTLE_SYM
6286 #define TARGET_LITTLE_SYM k1om_elf64_vec
6287 #undef TARGET_LITTLE_NAME
6288 #define TARGET_LITTLE_NAME "elf64-k1om"
6290 #define ELF_ARCH bfd_arch_k1om
6292 #undef ELF_MACHINE_CODE
6293 #define ELF_MACHINE_CODE EM_K1OM
6298 #define elf64_bed elf64_k1om_bed
6300 #undef elf_backend_object_p
6301 #define elf_backend_object_p elf64_k1om_elf_object_p
6303 #undef elf_backend_static_tls_alignment
6305 #undef elf_backend_want_plt_sym
6306 #define elf_backend_want_plt_sym 0
6308 #include "elf64-target.h"
6310 /* FreeBSD K1OM support. */
6312 #undef TARGET_LITTLE_SYM
6313 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6314 #undef TARGET_LITTLE_NAME
6315 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6318 #define ELF_OSABI ELFOSABI_FREEBSD
6321 #define elf64_bed elf64_k1om_fbsd_bed
6323 #include "elf64-target.h"
6325 /* 32bit x86-64 support. */
6327 #undef TARGET_LITTLE_SYM
6328 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6329 #undef TARGET_LITTLE_NAME
6330 #define TARGET_LITTLE_NAME "elf32-x86-64"
6334 #define ELF_ARCH bfd_arch_i386
6336 #undef ELF_MACHINE_CODE
6337 #define ELF_MACHINE_CODE EM_X86_64
6341 #undef elf_backend_object_p
6342 #define elf_backend_object_p \
6343 elf32_x86_64_elf_object_p
6345 #undef elf_backend_bfd_from_remote_memory
6346 #define elf_backend_bfd_from_remote_memory \
6347 _bfd_elf32_bfd_from_remote_memory
6349 #undef elf_backend_size_info
6350 #define elf_backend_size_info \
6351 _bfd_elf32_size_info
6353 #include "elf32-target.h"