1 /* X86-64 specific support for ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
4 Free Software Foundation, Inc.
5 Contributed by Jan Hubicka <jh@suse.cz>.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
30 #include "bfd_stdint.h"
34 #include "libiberty.h"
36 #include "elf/x86-64.h"
43 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
44 #define MINUS_ONE (~ (bfd_vma) 0)
46 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
47 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
48 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
49 since they are the same. */
51 #define ABI_64_P(abfd) \
52 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
54 /* The relocation "howto" table. Order of fields:
55 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
56 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
57 static reloc_howto_type x86_64_elf_howto_table
[] =
59 HOWTO(R_X86_64_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
60 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
62 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
63 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
65 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
66 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
68 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
69 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
71 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
72 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
74 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
75 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
77 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
78 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
80 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
81 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
83 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
86 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
87 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
89 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
90 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
92 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
93 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
95 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
97 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
99 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
100 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
101 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
102 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
103 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
106 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
107 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
109 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
110 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
112 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
113 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
115 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
116 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
118 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
119 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
121 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
122 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
124 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
125 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
127 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
130 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
131 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
132 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
133 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
134 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
135 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
136 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
137 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
139 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
140 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
142 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
143 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
144 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
145 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
146 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
148 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
149 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
151 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
152 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", FALSE
, 0xffffffff, 0xffffffff,
154 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, FALSE
, 0, complain_overflow_unsigned
,
155 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", FALSE
, MINUS_ONE
, MINUS_ONE
,
157 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
158 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
159 "R_X86_64_GOTPC32_TLSDESC",
160 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
161 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
162 complain_overflow_dont
, bfd_elf_generic_reloc
,
163 "R_X86_64_TLSDESC_CALL",
165 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
166 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
168 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
169 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
170 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
172 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
173 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
175 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
176 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", FALSE
, 0xffffffff, 0xffffffff,
178 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
179 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", FALSE
, 0xffffffff, 0xffffffff,
182 /* We have a gap in the reloc numbers here.
183 R_X86_64_standard counts the number up to this point, and
184 R_X86_64_vt_offset is the value to subtract from a reloc type of
185 R_X86_64_GNU_VT* to form an index into this table. */
186 #define R_X86_64_standard (R_X86_64_PLT32_BND + 1)
187 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
189 /* GNU extension to record C++ vtable hierarchy. */
190 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
191 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
193 /* GNU extension to record C++ vtable member usage. */
194 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
195 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
198 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
199 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
200 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
204 #define IS_X86_64_PCREL_TYPE(TYPE) \
205 ( ((TYPE) == R_X86_64_PC8) \
206 || ((TYPE) == R_X86_64_PC16) \
207 || ((TYPE) == R_X86_64_PC32) \
208 || ((TYPE) == R_X86_64_PC32_BND) \
209 || ((TYPE) == R_X86_64_PC64))
211 /* Map BFD relocs to the x86_64 elf relocs. */
214 bfd_reloc_code_real_type bfd_reloc_val
;
215 unsigned char elf_reloc_val
;
218 static const struct elf_reloc_map x86_64_reloc_map
[] =
220 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
221 { BFD_RELOC_64
, R_X86_64_64
, },
222 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
223 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
224 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
225 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
226 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
227 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
228 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
229 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
230 { BFD_RELOC_32
, R_X86_64_32
, },
231 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
232 { BFD_RELOC_16
, R_X86_64_16
, },
233 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
234 { BFD_RELOC_8
, R_X86_64_8
, },
235 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
236 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
237 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
238 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
239 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
240 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
241 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
242 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
243 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
244 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
245 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
246 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
247 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
248 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
249 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
250 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
251 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
252 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
253 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
254 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
255 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
256 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
257 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
258 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
,},
259 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
,},
260 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
261 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
264 static reloc_howto_type
*
265 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
269 if (r_type
== (unsigned int) R_X86_64_32
)
274 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
276 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
277 || r_type
>= (unsigned int) R_X86_64_max
)
279 if (r_type
>= (unsigned int) R_X86_64_standard
)
281 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
283 r_type
= R_X86_64_NONE
;
288 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
289 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
290 return &x86_64_elf_howto_table
[i
];
293 /* Given a BFD reloc type, return a HOWTO structure. */
294 static reloc_howto_type
*
295 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
296 bfd_reloc_code_real_type code
)
300 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
303 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
304 return elf_x86_64_rtype_to_howto (abfd
,
305 x86_64_reloc_map
[i
].elf_reloc_val
);
310 static reloc_howto_type
*
311 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
316 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
318 /* Get x32 R_X86_64_32. */
319 reloc_howto_type
*reloc
320 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
321 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
325 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
326 if (x86_64_elf_howto_table
[i
].name
!= NULL
327 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
328 return &x86_64_elf_howto_table
[i
];
333 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
336 elf_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
337 Elf_Internal_Rela
*dst
)
341 r_type
= ELF32_R_TYPE (dst
->r_info
);
342 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
343 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
346 /* Support for core dump NOTE sections. */
348 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
353 switch (note
->descsz
)
358 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
360 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
363 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
371 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
373 elf_tdata (abfd
)->core
->signal
374 = bfd_get_16 (abfd
, note
->descdata
+ 12);
377 elf_tdata (abfd
)->core
->lwpid
378 = bfd_get_32 (abfd
, note
->descdata
+ 32);
387 /* Make a ".reg/999" section. */
388 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
389 size
, note
->descpos
+ offset
);
393 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
395 switch (note
->descsz
)
400 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
401 elf_tdata (abfd
)->core
->pid
402 = bfd_get_32 (abfd
, note
->descdata
+ 12);
403 elf_tdata (abfd
)->core
->program
404 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
405 elf_tdata (abfd
)->core
->command
406 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
409 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
410 elf_tdata (abfd
)->core
->pid
411 = bfd_get_32 (abfd
, note
->descdata
+ 24);
412 elf_tdata (abfd
)->core
->program
413 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
414 elf_tdata (abfd
)->core
->command
415 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
418 /* Note that for some reason, a spurious space is tacked
419 onto the end of the args in some (at least one anyway)
420 implementations, so strip it off if it exists. */
423 char *command
= elf_tdata (abfd
)->core
->command
;
424 int n
= strlen (command
);
426 if (0 < n
&& command
[n
- 1] == ' ')
427 command
[n
- 1] = '\0';
435 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
438 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
440 const char *fname
, *psargs
;
451 va_start (ap
, note_type
);
452 fname
= va_arg (ap
, const char *);
453 psargs
= va_arg (ap
, const char *);
456 if (bed
->s
->elfclass
== ELFCLASS32
)
459 memset (&data
, 0, sizeof (data
));
460 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
461 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
462 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
463 &data
, sizeof (data
));
468 memset (&data
, 0, sizeof (data
));
469 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
470 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
471 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
472 &data
, sizeof (data
));
477 va_start (ap
, note_type
);
478 pid
= va_arg (ap
, long);
479 cursig
= va_arg (ap
, int);
480 gregs
= va_arg (ap
, const void *);
483 if (bed
->s
->elfclass
== ELFCLASS32
)
485 if (bed
->elf_machine_code
== EM_X86_64
)
487 prstatusx32_t prstat
;
488 memset (&prstat
, 0, sizeof (prstat
));
490 prstat
.pr_cursig
= cursig
;
491 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
492 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
493 &prstat
, sizeof (prstat
));
498 memset (&prstat
, 0, sizeof (prstat
));
500 prstat
.pr_cursig
= cursig
;
501 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
502 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
503 &prstat
, sizeof (prstat
));
509 memset (&prstat
, 0, sizeof (prstat
));
511 prstat
.pr_cursig
= cursig
;
512 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
513 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
514 &prstat
, sizeof (prstat
));
521 /* Functions for the x86-64 ELF linker. */
523 /* The name of the dynamic interpreter. This is put in the .interp
526 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
527 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
529 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
533 #define ELIMINATE_COPY_RELOCS 1
535 /* The size in bytes of an entry in the global offset table. */
537 #define GOT_ENTRY_SIZE 8
539 /* The size in bytes of an entry in the procedure linkage table. */
541 #define PLT_ENTRY_SIZE 16
543 /* The first entry in a procedure linkage table looks like this. See the
544 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
546 static const bfd_byte elf_x86_64_plt0_entry
[PLT_ENTRY_SIZE
] =
548 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
549 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
550 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
553 /* Subsequent entries in a procedure linkage table look like this. */
555 static const bfd_byte elf_x86_64_plt_entry
[PLT_ENTRY_SIZE
] =
557 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
558 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
559 0x68, /* pushq immediate */
560 0, 0, 0, 0, /* replaced with index into relocation table. */
561 0xe9, /* jmp relative */
562 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
565 /* .eh_frame covering the .plt section. */
567 static const bfd_byte elf_x86_64_eh_frame_plt
[] =
569 #define PLT_CIE_LENGTH 20
570 #define PLT_FDE_LENGTH 36
571 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
572 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
573 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
574 0, 0, 0, 0, /* CIE ID */
576 'z', 'R', 0, /* Augmentation string */
577 1, /* Code alignment factor */
578 0x78, /* Data alignment factor */
579 16, /* Return address column */
580 1, /* Augmentation size */
581 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
582 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
583 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
584 DW_CFA_nop
, DW_CFA_nop
,
586 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
587 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
588 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
589 0, 0, 0, 0, /* .plt size goes here */
590 0, /* Augmentation size */
591 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
592 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
593 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
594 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
595 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
596 11, /* Block length */
597 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
598 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
599 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
600 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
601 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
604 /* Architecture-specific backend data for x86-64. */
606 struct elf_x86_64_backend_data
608 /* Templates for the initial PLT entry and for subsequent entries. */
609 const bfd_byte
*plt0_entry
;
610 const bfd_byte
*plt_entry
;
611 unsigned int plt_entry_size
; /* Size of each PLT entry. */
613 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
614 unsigned int plt0_got1_offset
;
615 unsigned int plt0_got2_offset
;
617 /* Offset of the end of the PC-relative instruction containing
619 unsigned int plt0_got2_insn_end
;
621 /* Offsets into plt_entry that are to be replaced with... */
622 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
623 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
624 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
626 /* Length of the PC-relative instruction containing plt_got_offset. */
627 unsigned int plt_got_insn_size
;
629 /* Offset of the end of the PC-relative jump to plt0_entry. */
630 unsigned int plt_plt_insn_end
;
632 /* Offset into plt_entry where the initial value of the GOT entry points. */
633 unsigned int plt_lazy_offset
;
635 /* .eh_frame covering the .plt section. */
636 const bfd_byte
*eh_frame_plt
;
637 unsigned int eh_frame_plt_size
;
640 #define get_elf_x86_64_arch_data(bed) \
641 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
643 #define get_elf_x86_64_backend_data(abfd) \
644 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
646 #define GET_PLT_ENTRY_SIZE(abfd) \
647 get_elf_x86_64_backend_data (abfd)->plt_entry_size
649 /* These are the standard parameters. */
650 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
652 elf_x86_64_plt0_entry
, /* plt0_entry */
653 elf_x86_64_plt_entry
, /* plt_entry */
654 sizeof (elf_x86_64_plt_entry
), /* plt_entry_size */
655 2, /* plt0_got1_offset */
656 8, /* plt0_got2_offset */
657 12, /* plt0_got2_insn_end */
658 2, /* plt_got_offset */
659 7, /* plt_reloc_offset */
660 12, /* plt_plt_offset */
661 6, /* plt_got_insn_size */
662 PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
663 6, /* plt_lazy_offset */
664 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
665 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
668 #define elf_backend_arch_data &elf_x86_64_arch_bed
670 /* x86-64 ELF linker hash entry. */
672 struct elf_x86_64_link_hash_entry
674 struct elf_link_hash_entry elf
;
676 /* Track dynamic relocs copied for this symbol. */
677 struct elf_dyn_relocs
*dyn_relocs
;
679 #define GOT_UNKNOWN 0
683 #define GOT_TLS_GDESC 4
684 #define GOT_TLS_GD_BOTH_P(type) \
685 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
686 #define GOT_TLS_GD_P(type) \
687 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
688 #define GOT_TLS_GDESC_P(type) \
689 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
690 #define GOT_TLS_GD_ANY_P(type) \
691 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
692 unsigned char tls_type
;
694 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
695 starting at the end of the jump table. */
699 #define elf_x86_64_hash_entry(ent) \
700 ((struct elf_x86_64_link_hash_entry *)(ent))
702 struct elf_x86_64_obj_tdata
704 struct elf_obj_tdata root
;
706 /* tls_type for each local got entry. */
707 char *local_got_tls_type
;
709 /* GOTPLT entries for TLS descriptors. */
710 bfd_vma
*local_tlsdesc_gotent
;
713 #define elf_x86_64_tdata(abfd) \
714 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
716 #define elf_x86_64_local_got_tls_type(abfd) \
717 (elf_x86_64_tdata (abfd)->local_got_tls_type)
719 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
720 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
722 #define is_x86_64_elf(bfd) \
723 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
724 && elf_tdata (bfd) != NULL \
725 && elf_object_id (bfd) == X86_64_ELF_DATA)
728 elf_x86_64_mkobject (bfd
*abfd
)
730 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_x86_64_obj_tdata
),
734 /* x86-64 ELF linker hash table. */
736 struct elf_x86_64_link_hash_table
738 struct elf_link_hash_table elf
;
740 /* Short-cuts to get to dynamic linker sections. */
743 asection
*plt_eh_frame
;
747 bfd_signed_vma refcount
;
751 /* The amount of space used by the jump slots in the GOT. */
752 bfd_vma sgotplt_jump_table_size
;
754 /* Small local sym cache. */
755 struct sym_cache sym_cache
;
757 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
758 bfd_vma (*r_sym
) (bfd_vma
);
759 unsigned int pointer_r_type
;
760 const char *dynamic_interpreter
;
761 int dynamic_interpreter_size
;
763 /* _TLS_MODULE_BASE_ symbol. */
764 struct bfd_link_hash_entry
*tls_module_base
;
766 /* Used by local STT_GNU_IFUNC symbols. */
767 htab_t loc_hash_table
;
768 void * loc_hash_memory
;
770 /* The offset into splt of the PLT entry for the TLS descriptor
771 resolver. Special values are 0, if not necessary (or not found
772 to be necessary yet), and -1 if needed but not determined
775 /* The offset into sgot of the GOT entry used by the PLT entry
779 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
780 bfd_vma next_jump_slot_index
;
781 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
782 bfd_vma next_irelative_index
;
785 /* Get the x86-64 ELF linker hash table from a link_info structure. */
787 #define elf_x86_64_hash_table(p) \
788 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
789 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
791 #define elf_x86_64_compute_jump_table_size(htab) \
792 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
794 /* Create an entry in an x86-64 ELF linker hash table. */
796 static struct bfd_hash_entry
*
797 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
798 struct bfd_hash_table
*table
,
801 /* Allocate the structure if it has not already been allocated by a
805 entry
= (struct bfd_hash_entry
*)
806 bfd_hash_allocate (table
,
807 sizeof (struct elf_x86_64_link_hash_entry
));
812 /* Call the allocation method of the superclass. */
813 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
816 struct elf_x86_64_link_hash_entry
*eh
;
818 eh
= (struct elf_x86_64_link_hash_entry
*) entry
;
819 eh
->dyn_relocs
= NULL
;
820 eh
->tls_type
= GOT_UNKNOWN
;
821 eh
->tlsdesc_got
= (bfd_vma
) -1;
827 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
828 for local symbol so that we can handle local STT_GNU_IFUNC symbols
829 as global symbol. We reuse indx and dynstr_index for local symbol
830 hash since they aren't used by global symbols in this backend. */
833 elf_x86_64_local_htab_hash (const void *ptr
)
835 struct elf_link_hash_entry
*h
836 = (struct elf_link_hash_entry
*) ptr
;
837 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
840 /* Compare local hash entries. */
843 elf_x86_64_local_htab_eq (const void *ptr1
, const void *ptr2
)
845 struct elf_link_hash_entry
*h1
846 = (struct elf_link_hash_entry
*) ptr1
;
847 struct elf_link_hash_entry
*h2
848 = (struct elf_link_hash_entry
*) ptr2
;
850 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
853 /* Find and/or create a hash entry for local symbol. */
855 static struct elf_link_hash_entry
*
856 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table
*htab
,
857 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
860 struct elf_x86_64_link_hash_entry e
, *ret
;
861 asection
*sec
= abfd
->sections
;
862 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
863 htab
->r_sym (rel
->r_info
));
866 e
.elf
.indx
= sec
->id
;
867 e
.elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
868 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
869 create
? INSERT
: NO_INSERT
);
876 ret
= (struct elf_x86_64_link_hash_entry
*) *slot
;
880 ret
= (struct elf_x86_64_link_hash_entry
*)
881 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
882 sizeof (struct elf_x86_64_link_hash_entry
));
885 memset (ret
, 0, sizeof (*ret
));
886 ret
->elf
.indx
= sec
->id
;
887 ret
->elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
888 ret
->elf
.dynindx
= -1;
894 /* Create an X86-64 ELF linker hash table. */
896 static struct bfd_link_hash_table
*
897 elf_x86_64_link_hash_table_create (bfd
*abfd
)
899 struct elf_x86_64_link_hash_table
*ret
;
900 bfd_size_type amt
= sizeof (struct elf_x86_64_link_hash_table
);
902 ret
= (struct elf_x86_64_link_hash_table
*) bfd_zmalloc (amt
);
906 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
907 elf_x86_64_link_hash_newfunc
,
908 sizeof (struct elf_x86_64_link_hash_entry
),
917 ret
->r_info
= elf64_r_info
;
918 ret
->r_sym
= elf64_r_sym
;
919 ret
->pointer_r_type
= R_X86_64_64
;
920 ret
->dynamic_interpreter
= ELF64_DYNAMIC_INTERPRETER
;
921 ret
->dynamic_interpreter_size
= sizeof ELF64_DYNAMIC_INTERPRETER
;
925 ret
->r_info
= elf32_r_info
;
926 ret
->r_sym
= elf32_r_sym
;
927 ret
->pointer_r_type
= R_X86_64_32
;
928 ret
->dynamic_interpreter
= ELF32_DYNAMIC_INTERPRETER
;
929 ret
->dynamic_interpreter_size
= sizeof ELF32_DYNAMIC_INTERPRETER
;
932 ret
->loc_hash_table
= htab_try_create (1024,
933 elf_x86_64_local_htab_hash
,
934 elf_x86_64_local_htab_eq
,
936 ret
->loc_hash_memory
= objalloc_create ();
937 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
943 return &ret
->elf
.root
;
946 /* Destroy an X86-64 ELF linker hash table. */
949 elf_x86_64_link_hash_table_free (struct bfd_link_hash_table
*hash
)
951 struct elf_x86_64_link_hash_table
*htab
952 = (struct elf_x86_64_link_hash_table
*) hash
;
954 if (htab
->loc_hash_table
)
955 htab_delete (htab
->loc_hash_table
);
956 if (htab
->loc_hash_memory
)
957 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
958 _bfd_elf_link_hash_table_free (hash
);
961 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
962 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
966 elf_x86_64_create_dynamic_sections (bfd
*dynobj
,
967 struct bfd_link_info
*info
)
969 struct elf_x86_64_link_hash_table
*htab
;
971 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
974 htab
= elf_x86_64_hash_table (info
);
978 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
980 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
983 || (!info
->shared
&& !htab
->srelbss
))
986 if (!info
->no_ld_generated_unwind_info
987 && htab
->plt_eh_frame
== NULL
988 && htab
->elf
.splt
!= NULL
)
990 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
991 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
992 | SEC_LINKER_CREATED
);
994 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
995 if (htab
->plt_eh_frame
== NULL
996 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 3))
1002 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1005 elf_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
1006 struct elf_link_hash_entry
*dir
,
1007 struct elf_link_hash_entry
*ind
)
1009 struct elf_x86_64_link_hash_entry
*edir
, *eind
;
1011 edir
= (struct elf_x86_64_link_hash_entry
*) dir
;
1012 eind
= (struct elf_x86_64_link_hash_entry
*) ind
;
1014 if (eind
->dyn_relocs
!= NULL
)
1016 if (edir
->dyn_relocs
!= NULL
)
1018 struct elf_dyn_relocs
**pp
;
1019 struct elf_dyn_relocs
*p
;
1021 /* Add reloc counts against the indirect sym to the direct sym
1022 list. Merge any entries against the same section. */
1023 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1025 struct elf_dyn_relocs
*q
;
1027 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1028 if (q
->sec
== p
->sec
)
1030 q
->pc_count
+= p
->pc_count
;
1031 q
->count
+= p
->count
;
1038 *pp
= edir
->dyn_relocs
;
1041 edir
->dyn_relocs
= eind
->dyn_relocs
;
1042 eind
->dyn_relocs
= NULL
;
1045 if (ind
->root
.type
== bfd_link_hash_indirect
1046 && dir
->got
.refcount
<= 0)
1048 edir
->tls_type
= eind
->tls_type
;
1049 eind
->tls_type
= GOT_UNKNOWN
;
1052 if (ELIMINATE_COPY_RELOCS
1053 && ind
->root
.type
!= bfd_link_hash_indirect
1054 && dir
->dynamic_adjusted
)
1056 /* If called to transfer flags for a weakdef during processing
1057 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1058 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1059 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1060 dir
->ref_regular
|= ind
->ref_regular
;
1061 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1062 dir
->needs_plt
|= ind
->needs_plt
;
1063 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1066 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1070 elf64_x86_64_elf_object_p (bfd
*abfd
)
1072 /* Set the right machine number for an x86-64 elf64 file. */
1073 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1078 elf32_x86_64_elf_object_p (bfd
*abfd
)
1080 /* Set the right machine number for an x86-64 elf32 file. */
1081 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1085 /* Return TRUE if the TLS access code sequence support transition
1089 elf_x86_64_check_tls_transition (bfd
*abfd
,
1090 struct bfd_link_info
*info
,
1093 Elf_Internal_Shdr
*symtab_hdr
,
1094 struct elf_link_hash_entry
**sym_hashes
,
1095 unsigned int r_type
,
1096 const Elf_Internal_Rela
*rel
,
1097 const Elf_Internal_Rela
*relend
)
1100 unsigned long r_symndx
;
1101 bfd_boolean largepic
= FALSE
;
1102 struct elf_link_hash_entry
*h
;
1104 struct elf_x86_64_link_hash_table
*htab
;
1106 /* Get the section contents. */
1107 if (contents
== NULL
)
1109 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1110 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1113 /* FIXME: How to better handle error condition? */
1114 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1117 /* Cache the section contents for elf_link_input_bfd. */
1118 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1122 htab
= elf_x86_64_hash_table (info
);
1123 offset
= rel
->r_offset
;
1126 case R_X86_64_TLSGD
:
1127 case R_X86_64_TLSLD
:
1128 if ((rel
+ 1) >= relend
)
1131 if (r_type
== R_X86_64_TLSGD
)
1133 /* Check transition from GD access model. For 64bit, only
1134 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1135 .word 0x6666; rex64; call __tls_get_addr
1136 can transit to different access model. For 32bit, only
1137 leaq foo@tlsgd(%rip), %rdi
1138 .word 0x6666; rex64; call __tls_get_addr
1139 can transit to different access model. For largepic
1141 leaq foo@tlsgd(%rip), %rdi
1142 movabsq $__tls_get_addr@pltoff, %rax
1146 static const unsigned char call
[] = { 0x66, 0x66, 0x48, 0xe8 };
1147 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1149 if ((offset
+ 12) > sec
->size
)
1152 if (memcmp (contents
+ offset
+ 4, call
, 4) != 0)
1154 if (!ABI_64_P (abfd
)
1155 || (offset
+ 19) > sec
->size
1157 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0
1158 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1159 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1164 else if (ABI_64_P (abfd
))
1167 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1173 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1179 /* Check transition from LD access model. Only
1180 leaq foo@tlsld(%rip), %rdi;
1182 can transit to different access model. For largepic
1184 leaq foo@tlsld(%rip), %rdi
1185 movabsq $__tls_get_addr@pltoff, %rax
1189 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1191 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1194 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1197 if (0xe8 != *(contents
+ offset
+ 4))
1199 if (!ABI_64_P (abfd
)
1200 || (offset
+ 19) > sec
->size
1201 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1202 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1209 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1210 if (r_symndx
< symtab_hdr
->sh_info
)
1213 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1214 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1215 may be versioned. */
1217 && h
->root
.root
.string
!= NULL
1219 ? ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLTOFF64
1220 : (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1221 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
))
1222 && (strncmp (h
->root
.root
.string
,
1223 "__tls_get_addr", 14) == 0));
1225 case R_X86_64_GOTTPOFF
:
1226 /* Check transition from IE access model:
1227 mov foo@gottpoff(%rip), %reg
1228 add foo@gottpoff(%rip), %reg
1231 /* Check REX prefix first. */
1232 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1234 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1235 if (val
!= 0x48 && val
!= 0x4c)
1237 /* X32 may have 0x44 REX prefix or no REX prefix. */
1238 if (ABI_64_P (abfd
))
1244 /* X32 may not have any REX prefix. */
1245 if (ABI_64_P (abfd
))
1247 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1251 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1252 if (val
!= 0x8b && val
!= 0x03)
1255 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1256 return (val
& 0xc7) == 5;
1258 case R_X86_64_GOTPC32_TLSDESC
:
1259 /* Check transition from GDesc access model:
1260 leaq x@tlsdesc(%rip), %rax
1262 Make sure it's a leaq adding rip to a 32-bit offset
1263 into any register, although it's probably almost always
1266 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1269 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1270 if ((val
& 0xfb) != 0x48)
1273 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1276 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1277 return (val
& 0xc7) == 0x05;
1279 case R_X86_64_TLSDESC_CALL
:
1280 /* Check transition from GDesc access model:
1281 call *x@tlsdesc(%rax)
1283 if (offset
+ 2 <= sec
->size
)
1285 /* Make sure that it's a call *x@tlsdesc(%rax). */
1286 static const unsigned char call
[] = { 0xff, 0x10 };
1287 return memcmp (contents
+ offset
, call
, 2) == 0;
1297 /* Return TRUE if the TLS access transition is OK or no transition
1298 will be performed. Update R_TYPE if there is a transition. */
1301 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1302 asection
*sec
, bfd_byte
*contents
,
1303 Elf_Internal_Shdr
*symtab_hdr
,
1304 struct elf_link_hash_entry
**sym_hashes
,
1305 unsigned int *r_type
, int tls_type
,
1306 const Elf_Internal_Rela
*rel
,
1307 const Elf_Internal_Rela
*relend
,
1308 struct elf_link_hash_entry
*h
,
1309 unsigned long r_symndx
)
1311 unsigned int from_type
= *r_type
;
1312 unsigned int to_type
= from_type
;
1313 bfd_boolean check
= TRUE
;
1315 /* Skip TLS transition for functions. */
1317 && (h
->type
== STT_FUNC
1318 || h
->type
== STT_GNU_IFUNC
))
1323 case R_X86_64_TLSGD
:
1324 case R_X86_64_GOTPC32_TLSDESC
:
1325 case R_X86_64_TLSDESC_CALL
:
1326 case R_X86_64_GOTTPOFF
:
1327 if (info
->executable
)
1330 to_type
= R_X86_64_TPOFF32
;
1332 to_type
= R_X86_64_GOTTPOFF
;
1335 /* When we are called from elf_x86_64_relocate_section,
1336 CONTENTS isn't NULL and there may be additional transitions
1337 based on TLS_TYPE. */
1338 if (contents
!= NULL
)
1340 unsigned int new_to_type
= to_type
;
1342 if (info
->executable
1345 && tls_type
== GOT_TLS_IE
)
1346 new_to_type
= R_X86_64_TPOFF32
;
1348 if (to_type
== R_X86_64_TLSGD
1349 || to_type
== R_X86_64_GOTPC32_TLSDESC
1350 || to_type
== R_X86_64_TLSDESC_CALL
)
1352 if (tls_type
== GOT_TLS_IE
)
1353 new_to_type
= R_X86_64_GOTTPOFF
;
1356 /* We checked the transition before when we were called from
1357 elf_x86_64_check_relocs. We only want to check the new
1358 transition which hasn't been checked before. */
1359 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1360 to_type
= new_to_type
;
1365 case R_X86_64_TLSLD
:
1366 if (info
->executable
)
1367 to_type
= R_X86_64_TPOFF32
;
1374 /* Return TRUE if there is no transition. */
1375 if (from_type
== to_type
)
1378 /* Check if the transition can be performed. */
1380 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1381 symtab_hdr
, sym_hashes
,
1382 from_type
, rel
, relend
))
1384 reloc_howto_type
*from
, *to
;
1387 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1388 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1391 name
= h
->root
.root
.string
;
1394 struct elf_x86_64_link_hash_table
*htab
;
1396 htab
= elf_x86_64_hash_table (info
);
1401 Elf_Internal_Sym
*isym
;
1403 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1405 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1409 (*_bfd_error_handler
)
1410 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1411 "in section `%A' failed"),
1412 abfd
, sec
, from
->name
, to
->name
, name
,
1413 (unsigned long) rel
->r_offset
);
1414 bfd_set_error (bfd_error_bad_value
);
1422 /* Look through the relocs for a section during the first phase, and
1423 calculate needed space in the global offset table, procedure
1424 linkage table, and dynamic reloc sections. */
1427 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1429 const Elf_Internal_Rela
*relocs
)
1431 struct elf_x86_64_link_hash_table
*htab
;
1432 Elf_Internal_Shdr
*symtab_hdr
;
1433 struct elf_link_hash_entry
**sym_hashes
;
1434 const Elf_Internal_Rela
*rel
;
1435 const Elf_Internal_Rela
*rel_end
;
1438 if (info
->relocatable
)
1441 BFD_ASSERT (is_x86_64_elf (abfd
));
1443 htab
= elf_x86_64_hash_table (info
);
1447 symtab_hdr
= &elf_symtab_hdr (abfd
);
1448 sym_hashes
= elf_sym_hashes (abfd
);
1452 rel_end
= relocs
+ sec
->reloc_count
;
1453 for (rel
= relocs
; rel
< rel_end
; rel
++)
1455 unsigned int r_type
;
1456 unsigned long r_symndx
;
1457 struct elf_link_hash_entry
*h
;
1458 Elf_Internal_Sym
*isym
;
1460 bfd_boolean size_reloc
;
1462 r_symndx
= htab
->r_sym (rel
->r_info
);
1463 r_type
= ELF32_R_TYPE (rel
->r_info
);
1465 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1467 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1472 if (r_symndx
< symtab_hdr
->sh_info
)
1474 /* A local symbol. */
1475 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1480 /* Check relocation against local STT_GNU_IFUNC symbol. */
1481 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1483 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
,
1488 /* Fake a STT_GNU_IFUNC symbol. */
1489 h
->type
= STT_GNU_IFUNC
;
1492 h
->forced_local
= 1;
1493 h
->root
.type
= bfd_link_hash_defined
;
1501 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1502 while (h
->root
.type
== bfd_link_hash_indirect
1503 || h
->root
.type
== bfd_link_hash_warning
)
1504 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1507 /* Check invalid x32 relocations. */
1508 if (!ABI_64_P (abfd
))
1514 case R_X86_64_DTPOFF64
:
1515 case R_X86_64_TPOFF64
:
1517 case R_X86_64_GOTOFF64
:
1518 case R_X86_64_GOT64
:
1519 case R_X86_64_GOTPCREL64
:
1520 case R_X86_64_GOTPC64
:
1521 case R_X86_64_GOTPLT64
:
1522 case R_X86_64_PLTOFF64
:
1525 name
= h
->root
.root
.string
;
1527 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1529 (*_bfd_error_handler
)
1530 (_("%B: relocation %s against symbol `%s' isn't "
1531 "supported in x32 mode"), abfd
,
1532 x86_64_elf_howto_table
[r_type
].name
, name
);
1533 bfd_set_error (bfd_error_bad_value
);
1541 /* Create the ifunc sections for static executables. If we
1542 never see an indirect function symbol nor we are building
1543 a static executable, those sections will be empty and
1544 won't appear in output. */
1554 case R_X86_64_PC32_BND
:
1556 case R_X86_64_PLT32
:
1557 case R_X86_64_PLT32_BND
:
1558 case R_X86_64_GOTPCREL
:
1559 case R_X86_64_GOTPCREL64
:
1560 if (htab
->elf
.dynobj
== NULL
)
1561 htab
->elf
.dynobj
= abfd
;
1562 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1567 /* It is referenced by a non-shared object. */
1569 h
->root
.non_ir_ref
= 1;
1572 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1573 symtab_hdr
, sym_hashes
,
1574 &r_type
, GOT_UNKNOWN
,
1575 rel
, rel_end
, h
, r_symndx
))
1580 case R_X86_64_TLSLD
:
1581 htab
->tls_ld_got
.refcount
+= 1;
1584 case R_X86_64_TPOFF32
:
1585 if (!info
->executable
&& ABI_64_P (abfd
))
1588 name
= h
->root
.root
.string
;
1590 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1592 (*_bfd_error_handler
)
1593 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1595 x86_64_elf_howto_table
[r_type
].name
, name
);
1596 bfd_set_error (bfd_error_bad_value
);
1601 case R_X86_64_GOTTPOFF
:
1602 if (!info
->executable
)
1603 info
->flags
|= DF_STATIC_TLS
;
1606 case R_X86_64_GOT32
:
1607 case R_X86_64_GOTPCREL
:
1608 case R_X86_64_TLSGD
:
1609 case R_X86_64_GOT64
:
1610 case R_X86_64_GOTPCREL64
:
1611 case R_X86_64_GOTPLT64
:
1612 case R_X86_64_GOTPC32_TLSDESC
:
1613 case R_X86_64_TLSDESC_CALL
:
1614 /* This symbol requires a global offset table entry. */
1616 int tls_type
, old_tls_type
;
1620 default: tls_type
= GOT_NORMAL
; break;
1621 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1622 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1623 case R_X86_64_GOTPC32_TLSDESC
:
1624 case R_X86_64_TLSDESC_CALL
:
1625 tls_type
= GOT_TLS_GDESC
; break;
1630 if (r_type
== R_X86_64_GOTPLT64
)
1632 /* This relocation indicates that we also need
1633 a PLT entry, as this is a function. We don't need
1634 a PLT entry for local symbols. */
1636 h
->plt
.refcount
+= 1;
1638 h
->got
.refcount
+= 1;
1639 old_tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
1643 bfd_signed_vma
*local_got_refcounts
;
1645 /* This is a global offset table entry for a local symbol. */
1646 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1647 if (local_got_refcounts
== NULL
)
1651 size
= symtab_hdr
->sh_info
;
1652 size
*= sizeof (bfd_signed_vma
)
1653 + sizeof (bfd_vma
) + sizeof (char);
1654 local_got_refcounts
= ((bfd_signed_vma
*)
1655 bfd_zalloc (abfd
, size
));
1656 if (local_got_refcounts
== NULL
)
1658 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1659 elf_x86_64_local_tlsdesc_gotent (abfd
)
1660 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1661 elf_x86_64_local_got_tls_type (abfd
)
1662 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1664 local_got_refcounts
[r_symndx
] += 1;
1666 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1669 /* If a TLS symbol is accessed using IE at least once,
1670 there is no point to use dynamic model for it. */
1671 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1672 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1673 || tls_type
!= GOT_TLS_IE
))
1675 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1676 tls_type
= old_tls_type
;
1677 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1678 && GOT_TLS_GD_ANY_P (tls_type
))
1679 tls_type
|= old_tls_type
;
1683 name
= h
->root
.root
.string
;
1685 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1687 (*_bfd_error_handler
)
1688 (_("%B: '%s' accessed both as normal and thread local symbol"),
1690 bfd_set_error (bfd_error_bad_value
);
1695 if (old_tls_type
!= tls_type
)
1698 elf_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1700 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1705 case R_X86_64_GOTOFF64
:
1706 case R_X86_64_GOTPC32
:
1707 case R_X86_64_GOTPC64
:
1709 if (htab
->elf
.sgot
== NULL
)
1711 if (htab
->elf
.dynobj
== NULL
)
1712 htab
->elf
.dynobj
= abfd
;
1713 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1719 case R_X86_64_PLT32
:
1720 case R_X86_64_PLT32_BND
:
1721 /* This symbol requires a procedure linkage table entry. We
1722 actually build the entry in adjust_dynamic_symbol,
1723 because this might be a case of linking PIC code which is
1724 never referenced by a dynamic object, in which case we
1725 don't need to generate a procedure linkage table entry
1728 /* If this is a local symbol, we resolve it directly without
1729 creating a procedure linkage table entry. */
1734 h
->plt
.refcount
+= 1;
1737 case R_X86_64_PLTOFF64
:
1738 /* This tries to form the 'address' of a function relative
1739 to GOT. For global symbols we need a PLT entry. */
1743 h
->plt
.refcount
+= 1;
1747 case R_X86_64_SIZE32
:
1748 case R_X86_64_SIZE64
:
1753 if (!ABI_64_P (abfd
))
1758 /* Let's help debug shared library creation. These relocs
1759 cannot be used in shared libs. Don't error out for
1760 sections we don't care about, such as debug sections or
1761 non-constant sections. */
1763 && (sec
->flags
& SEC_ALLOC
) != 0
1764 && (sec
->flags
& SEC_READONLY
) != 0)
1767 name
= h
->root
.root
.string
;
1769 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1770 (*_bfd_error_handler
)
1771 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1772 abfd
, x86_64_elf_howto_table
[r_type
].name
, name
);
1773 bfd_set_error (bfd_error_bad_value
);
1781 case R_X86_64_PC32_BND
:
1785 if (h
!= NULL
&& info
->executable
)
1787 /* If this reloc is in a read-only section, we might
1788 need a copy reloc. We can't check reliably at this
1789 stage whether the section is read-only, as input
1790 sections have not yet been mapped to output sections.
1791 Tentatively set the flag for now, and correct in
1792 adjust_dynamic_symbol. */
1795 /* We may need a .plt entry if the function this reloc
1796 refers to is in a shared lib. */
1797 h
->plt
.refcount
+= 1;
1798 if (r_type
!= R_X86_64_PC32
1799 && r_type
!= R_X86_64_PC32_BND
1800 && r_type
!= R_X86_64_PC64
)
1801 h
->pointer_equality_needed
= 1;
1806 /* If we are creating a shared library, and this is a reloc
1807 against a global symbol, or a non PC relative reloc
1808 against a local symbol, then we need to copy the reloc
1809 into the shared library. However, if we are linking with
1810 -Bsymbolic, we do not need to copy a reloc against a
1811 global symbol which is defined in an object we are
1812 including in the link (i.e., DEF_REGULAR is set). At
1813 this point we have not seen all the input files, so it is
1814 possible that DEF_REGULAR is not set now but will be set
1815 later (it is never cleared). In case of a weak definition,
1816 DEF_REGULAR may be cleared later by a strong definition in
1817 a shared library. We account for that possibility below by
1818 storing information in the relocs_copied field of the hash
1819 table entry. A similar situation occurs when creating
1820 shared libraries and symbol visibility changes render the
1823 If on the other hand, we are creating an executable, we
1824 may need to keep relocations for symbols satisfied by a
1825 dynamic library if we manage to avoid copy relocs for the
1828 && (sec
->flags
& SEC_ALLOC
) != 0
1829 && (! IS_X86_64_PCREL_TYPE (r_type
)
1831 && (! SYMBOLIC_BIND (info
, h
)
1832 || h
->root
.type
== bfd_link_hash_defweak
1833 || !h
->def_regular
))))
1834 || (ELIMINATE_COPY_RELOCS
1836 && (sec
->flags
& SEC_ALLOC
) != 0
1838 && (h
->root
.type
== bfd_link_hash_defweak
1839 || !h
->def_regular
)))
1841 struct elf_dyn_relocs
*p
;
1842 struct elf_dyn_relocs
**head
;
1844 /* We must copy these reloc types into the output file.
1845 Create a reloc section in dynobj and make room for
1849 if (htab
->elf
.dynobj
== NULL
)
1850 htab
->elf
.dynobj
= abfd
;
1852 sreloc
= _bfd_elf_make_dynamic_reloc_section
1853 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
1854 abfd
, /*rela?*/ TRUE
);
1860 /* If this is a global symbol, we count the number of
1861 relocations we need for this symbol. */
1864 head
= &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
1868 /* Track dynamic relocs needed for local syms too.
1869 We really need local syms available to do this
1874 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1879 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1883 /* Beware of type punned pointers vs strict aliasing
1885 vpp
= &(elf_section_data (s
)->local_dynrel
);
1886 head
= (struct elf_dyn_relocs
**)vpp
;
1890 if (p
== NULL
|| p
->sec
!= sec
)
1892 bfd_size_type amt
= sizeof *p
;
1894 p
= ((struct elf_dyn_relocs
*)
1895 bfd_alloc (htab
->elf
.dynobj
, amt
));
1906 /* Count size relocation as PC-relative relocation. */
1907 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
1912 /* This relocation describes the C++ object vtable hierarchy.
1913 Reconstruct it for later use during GC. */
1914 case R_X86_64_GNU_VTINHERIT
:
1915 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1919 /* This relocation describes which C++ vtable entries are actually
1920 used. Record for later use during GC. */
1921 case R_X86_64_GNU_VTENTRY
:
1922 BFD_ASSERT (h
!= NULL
);
1924 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1936 /* Return the section that should be marked against GC for a given
1940 elf_x86_64_gc_mark_hook (asection
*sec
,
1941 struct bfd_link_info
*info
,
1942 Elf_Internal_Rela
*rel
,
1943 struct elf_link_hash_entry
*h
,
1944 Elf_Internal_Sym
*sym
)
1947 switch (ELF32_R_TYPE (rel
->r_info
))
1949 case R_X86_64_GNU_VTINHERIT
:
1950 case R_X86_64_GNU_VTENTRY
:
1954 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1957 /* Update the got entry reference counts for the section being removed. */
1960 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
1962 const Elf_Internal_Rela
*relocs
)
1964 struct elf_x86_64_link_hash_table
*htab
;
1965 Elf_Internal_Shdr
*symtab_hdr
;
1966 struct elf_link_hash_entry
**sym_hashes
;
1967 bfd_signed_vma
*local_got_refcounts
;
1968 const Elf_Internal_Rela
*rel
, *relend
;
1970 if (info
->relocatable
)
1973 htab
= elf_x86_64_hash_table (info
);
1977 elf_section_data (sec
)->local_dynrel
= NULL
;
1979 symtab_hdr
= &elf_symtab_hdr (abfd
);
1980 sym_hashes
= elf_sym_hashes (abfd
);
1981 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1983 htab
= elf_x86_64_hash_table (info
);
1984 relend
= relocs
+ sec
->reloc_count
;
1985 for (rel
= relocs
; rel
< relend
; rel
++)
1987 unsigned long r_symndx
;
1988 unsigned int r_type
;
1989 struct elf_link_hash_entry
*h
= NULL
;
1991 r_symndx
= htab
->r_sym (rel
->r_info
);
1992 if (r_symndx
>= symtab_hdr
->sh_info
)
1994 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1995 while (h
->root
.type
== bfd_link_hash_indirect
1996 || h
->root
.type
== bfd_link_hash_warning
)
1997 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2001 /* A local symbol. */
2002 Elf_Internal_Sym
*isym
;
2004 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2007 /* Check relocation against local STT_GNU_IFUNC symbol. */
2009 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2011 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2019 struct elf_x86_64_link_hash_entry
*eh
;
2020 struct elf_dyn_relocs
**pp
;
2021 struct elf_dyn_relocs
*p
;
2023 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2025 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2028 /* Everything must go for SEC. */
2034 r_type
= ELF32_R_TYPE (rel
->r_info
);
2035 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
2036 symtab_hdr
, sym_hashes
,
2037 &r_type
, GOT_UNKNOWN
,
2038 rel
, relend
, h
, r_symndx
))
2043 case R_X86_64_TLSLD
:
2044 if (htab
->tls_ld_got
.refcount
> 0)
2045 htab
->tls_ld_got
.refcount
-= 1;
2048 case R_X86_64_TLSGD
:
2049 case R_X86_64_GOTPC32_TLSDESC
:
2050 case R_X86_64_TLSDESC_CALL
:
2051 case R_X86_64_GOTTPOFF
:
2052 case R_X86_64_GOT32
:
2053 case R_X86_64_GOTPCREL
:
2054 case R_X86_64_GOT64
:
2055 case R_X86_64_GOTPCREL64
:
2056 case R_X86_64_GOTPLT64
:
2059 if (r_type
== R_X86_64_GOTPLT64
&& h
->plt
.refcount
> 0)
2060 h
->plt
.refcount
-= 1;
2061 if (h
->got
.refcount
> 0)
2062 h
->got
.refcount
-= 1;
2063 if (h
->type
== STT_GNU_IFUNC
)
2065 if (h
->plt
.refcount
> 0)
2066 h
->plt
.refcount
-= 1;
2069 else if (local_got_refcounts
!= NULL
)
2071 if (local_got_refcounts
[r_symndx
] > 0)
2072 local_got_refcounts
[r_symndx
] -= 1;
2084 case R_X86_64_PC32_BND
:
2086 case R_X86_64_SIZE32
:
2087 case R_X86_64_SIZE64
:
2089 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2093 case R_X86_64_PLT32
:
2094 case R_X86_64_PLT32_BND
:
2095 case R_X86_64_PLTOFF64
:
2098 if (h
->plt
.refcount
> 0)
2099 h
->plt
.refcount
-= 1;
2111 /* Adjust a symbol defined by a dynamic object and referenced by a
2112 regular object. The current definition is in some section of the
2113 dynamic object, but we're not including those sections. We have to
2114 change the definition to something the rest of the link can
2118 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2119 struct elf_link_hash_entry
*h
)
2121 struct elf_x86_64_link_hash_table
*htab
;
2123 struct elf_x86_64_link_hash_entry
*eh
;
2124 struct elf_dyn_relocs
*p
;
2126 /* STT_GNU_IFUNC symbol must go through PLT. */
2127 if (h
->type
== STT_GNU_IFUNC
)
2129 /* All local STT_GNU_IFUNC references must be treate as local
2130 calls via local PLT. */
2132 && SYMBOL_CALLS_LOCAL (info
, h
))
2134 bfd_size_type pc_count
= 0, count
= 0;
2135 struct elf_dyn_relocs
**pp
;
2137 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2138 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2140 pc_count
+= p
->pc_count
;
2141 p
->count
-= p
->pc_count
;
2150 if (pc_count
|| count
)
2154 if (h
->plt
.refcount
<= 0)
2155 h
->plt
.refcount
= 1;
2157 h
->plt
.refcount
+= 1;
2161 if (h
->plt
.refcount
<= 0)
2163 h
->plt
.offset
= (bfd_vma
) -1;
2169 /* If this is a function, put it in the procedure linkage table. We
2170 will fill in the contents of the procedure linkage table later,
2171 when we know the address of the .got section. */
2172 if (h
->type
== STT_FUNC
2175 if (h
->plt
.refcount
<= 0
2176 || SYMBOL_CALLS_LOCAL (info
, h
)
2177 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2178 && h
->root
.type
== bfd_link_hash_undefweak
))
2180 /* This case can occur if we saw a PLT32 reloc in an input
2181 file, but the symbol was never referred to by a dynamic
2182 object, or if all references were garbage collected. In
2183 such a case, we don't actually need to build a procedure
2184 linkage table, and we can just do a PC32 reloc instead. */
2185 h
->plt
.offset
= (bfd_vma
) -1;
2192 /* It's possible that we incorrectly decided a .plt reloc was
2193 needed for an R_X86_64_PC32 reloc to a non-function sym in
2194 check_relocs. We can't decide accurately between function and
2195 non-function syms in check-relocs; Objects loaded later in
2196 the link may change h->type. So fix it now. */
2197 h
->plt
.offset
= (bfd_vma
) -1;
2199 /* If this is a weak symbol, and there is a real definition, the
2200 processor independent code will have arranged for us to see the
2201 real definition first, and we can just use the same value. */
2202 if (h
->u
.weakdef
!= NULL
)
2204 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2205 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2206 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2207 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2208 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2209 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2213 /* This is a reference to a symbol defined by a dynamic object which
2214 is not a function. */
2216 /* If we are creating a shared library, we must presume that the
2217 only references to the symbol are via the global offset table.
2218 For such cases we need not do anything here; the relocations will
2219 be handled correctly by relocate_section. */
2223 /* If there are no references to this symbol that do not use the
2224 GOT, we don't need to generate a copy reloc. */
2225 if (!h
->non_got_ref
)
2228 /* If -z nocopyreloc was given, we won't generate them either. */
2229 if (info
->nocopyreloc
)
2235 if (ELIMINATE_COPY_RELOCS
)
2237 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2238 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2240 s
= p
->sec
->output_section
;
2241 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2245 /* If we didn't find any dynamic relocs in read-only sections, then
2246 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2254 /* We must allocate the symbol in our .dynbss section, which will
2255 become part of the .bss section of the executable. There will be
2256 an entry for this symbol in the .dynsym section. The dynamic
2257 object will contain position independent code, so all references
2258 from the dynamic object to this symbol will go through the global
2259 offset table. The dynamic linker will use the .dynsym entry to
2260 determine the address it must put in the global offset table, so
2261 both the dynamic object and the regular object will refer to the
2262 same memory location for the variable. */
2264 htab
= elf_x86_64_hash_table (info
);
2268 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2269 to copy the initial value out of the dynamic object and into the
2270 runtime process image. */
2271 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2273 const struct elf_backend_data
*bed
;
2274 bed
= get_elf_backend_data (info
->output_bfd
);
2275 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2281 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2284 /* Allocate space in .plt, .got and associated reloc sections for
2288 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2290 struct bfd_link_info
*info
;
2291 struct elf_x86_64_link_hash_table
*htab
;
2292 struct elf_x86_64_link_hash_entry
*eh
;
2293 struct elf_dyn_relocs
*p
;
2294 const struct elf_backend_data
*bed
;
2295 unsigned int plt_entry_size
;
2297 if (h
->root
.type
== bfd_link_hash_indirect
)
2300 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2302 info
= (struct bfd_link_info
*) inf
;
2303 htab
= elf_x86_64_hash_table (info
);
2306 bed
= get_elf_backend_data (info
->output_bfd
);
2307 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2309 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2310 here if it is defined and referenced in a non-shared object. */
2311 if (h
->type
== STT_GNU_IFUNC
2313 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2318 else if (htab
->elf
.dynamic_sections_created
2319 && h
->plt
.refcount
> 0)
2321 /* Make sure this symbol is output as a dynamic symbol.
2322 Undefined weak syms won't yet be marked as dynamic. */
2323 if (h
->dynindx
== -1
2324 && !h
->forced_local
)
2326 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2331 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2333 asection
*s
= htab
->elf
.splt
;
2335 /* If this is the first .plt entry, make room for the special
2338 s
->size
= plt_entry_size
;
2340 h
->plt
.offset
= s
->size
;
2342 /* If this symbol is not defined in a regular file, and we are
2343 not generating a shared library, then set the symbol to this
2344 location in the .plt. This is required to make function
2345 pointers compare as equal between the normal executable and
2346 the shared library. */
2350 h
->root
.u
.def
.section
= s
;
2351 h
->root
.u
.def
.value
= h
->plt
.offset
;
2354 /* Make room for this entry. */
2355 s
->size
+= plt_entry_size
;
2357 /* We also need to make an entry in the .got.plt section, which
2358 will be placed in the .got section by the linker script. */
2359 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2361 /* We also need to make an entry in the .rela.plt section. */
2362 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2363 htab
->elf
.srelplt
->reloc_count
++;
2367 h
->plt
.offset
= (bfd_vma
) -1;
2373 h
->plt
.offset
= (bfd_vma
) -1;
2377 eh
->tlsdesc_got
= (bfd_vma
) -1;
2379 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2380 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2381 if (h
->got
.refcount
> 0
2384 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2386 h
->got
.offset
= (bfd_vma
) -1;
2388 else if (h
->got
.refcount
> 0)
2392 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2394 /* Make sure this symbol is output as a dynamic symbol.
2395 Undefined weak syms won't yet be marked as dynamic. */
2396 if (h
->dynindx
== -1
2397 && !h
->forced_local
)
2399 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2403 if (GOT_TLS_GDESC_P (tls_type
))
2405 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2406 - elf_x86_64_compute_jump_table_size (htab
);
2407 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2408 h
->got
.offset
= (bfd_vma
) -2;
2410 if (! GOT_TLS_GDESC_P (tls_type
)
2411 || GOT_TLS_GD_P (tls_type
))
2414 h
->got
.offset
= s
->size
;
2415 s
->size
+= GOT_ENTRY_SIZE
;
2416 if (GOT_TLS_GD_P (tls_type
))
2417 s
->size
+= GOT_ENTRY_SIZE
;
2419 dyn
= htab
->elf
.dynamic_sections_created
;
2420 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2422 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2423 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2424 || tls_type
== GOT_TLS_IE
)
2425 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2426 else if (GOT_TLS_GD_P (tls_type
))
2427 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2428 else if (! GOT_TLS_GDESC_P (tls_type
)
2429 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2430 || h
->root
.type
!= bfd_link_hash_undefweak
)
2432 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2433 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2434 if (GOT_TLS_GDESC_P (tls_type
))
2436 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2437 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2441 h
->got
.offset
= (bfd_vma
) -1;
2443 if (eh
->dyn_relocs
== NULL
)
2446 /* In the shared -Bsymbolic case, discard space allocated for
2447 dynamic pc-relative relocs against symbols which turn out to be
2448 defined in regular objects. For the normal shared case, discard
2449 space for pc-relative relocs that have become local due to symbol
2450 visibility changes. */
2454 /* Relocs that use pc_count are those that appear on a call
2455 insn, or certain REL relocs that can generated via assembly.
2456 We want calls to protected symbols to resolve directly to the
2457 function rather than going via the plt. If people want
2458 function pointer comparisons to work as expected then they
2459 should avoid writing weird assembly. */
2460 if (SYMBOL_CALLS_LOCAL (info
, h
))
2462 struct elf_dyn_relocs
**pp
;
2464 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2466 p
->count
-= p
->pc_count
;
2475 /* Also discard relocs on undefined weak syms with non-default
2476 visibility. Don't discard relocs against __ehdr_start which
2477 will be defined by assign_file_positions_for_non_load_sections
2479 if (eh
->dyn_relocs
!= NULL
2480 && h
->root
.type
== bfd_link_hash_undefweak
2481 && strcmp (h
->root
.root
.string
, "__ehdr_start") != 0)
2483 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2484 eh
->dyn_relocs
= NULL
;
2486 /* Make sure undefined weak symbols are output as a dynamic
2488 else if (h
->dynindx
== -1
2489 && ! h
->forced_local
2490 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2495 else if (ELIMINATE_COPY_RELOCS
)
2497 /* For the non-shared case, discard space for relocs against
2498 symbols which turn out to need copy relocs or are not
2504 || (htab
->elf
.dynamic_sections_created
2505 && (h
->root
.type
== bfd_link_hash_undefweak
2506 || h
->root
.type
== bfd_link_hash_undefined
))))
2508 /* Make sure this symbol is output as a dynamic symbol.
2509 Undefined weak syms won't yet be marked as dynamic. */
2510 if (h
->dynindx
== -1
2511 && ! h
->forced_local
2512 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2515 /* If that succeeded, we know we'll be keeping all the
2517 if (h
->dynindx
!= -1)
2521 eh
->dyn_relocs
= NULL
;
2526 /* Finally, allocate space. */
2527 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2531 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2533 BFD_ASSERT (sreloc
!= NULL
);
2535 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2541 /* Allocate space in .plt, .got and associated reloc sections for
2542 local dynamic relocs. */
2545 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2547 struct elf_link_hash_entry
*h
2548 = (struct elf_link_hash_entry
*) *slot
;
2550 if (h
->type
!= STT_GNU_IFUNC
2554 || h
->root
.type
!= bfd_link_hash_defined
)
2557 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2560 /* Find any dynamic relocs that apply to read-only sections. */
2563 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2566 struct elf_x86_64_link_hash_entry
*eh
;
2567 struct elf_dyn_relocs
*p
;
2569 /* Skip local IFUNC symbols. */
2570 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2573 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2574 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2576 asection
*s
= p
->sec
->output_section
;
2578 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2580 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2582 info
->flags
|= DF_TEXTREL
;
2584 if (info
->warn_shared_textrel
&& info
->shared
)
2585 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2586 p
->sec
->owner
, h
->root
.root
.string
,
2589 /* Not an error, just cut short the traversal. */
2597 mov foo@GOTPCREL(%rip), %reg
2600 with the local symbol, foo. */
2603 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2604 struct bfd_link_info
*link_info
)
2606 Elf_Internal_Shdr
*symtab_hdr
;
2607 Elf_Internal_Rela
*internal_relocs
;
2608 Elf_Internal_Rela
*irel
, *irelend
;
2610 struct elf_x86_64_link_hash_table
*htab
;
2611 bfd_boolean changed_contents
;
2612 bfd_boolean changed_relocs
;
2613 bfd_signed_vma
*local_got_refcounts
;
2615 /* Don't even try to convert non-ELF outputs. */
2616 if (!is_elf_hash_table (link_info
->hash
))
2619 /* Nothing to do if there are no codes, no relocations or no output. */
2620 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2621 || sec
->reloc_count
== 0
2622 || discarded_section (sec
))
2625 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2627 /* Load the relocations for this section. */
2628 internal_relocs
= (_bfd_elf_link_read_relocs
2629 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2630 link_info
->keep_memory
));
2631 if (internal_relocs
== NULL
)
2634 htab
= elf_x86_64_hash_table (link_info
);
2635 changed_contents
= FALSE
;
2636 changed_relocs
= FALSE
;
2637 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2639 /* Get the section contents. */
2640 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2641 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2644 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2648 irelend
= internal_relocs
+ sec
->reloc_count
;
2649 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2651 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2652 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2654 struct elf_link_hash_entry
*h
;
2656 if (r_type
!= R_X86_64_GOTPCREL
)
2659 /* Get the symbol referred to by the reloc. */
2660 if (r_symndx
< symtab_hdr
->sh_info
)
2662 Elf_Internal_Sym
*isym
;
2664 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2667 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2668 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2669 && bfd_get_8 (input_bfd
,
2670 contents
+ irel
->r_offset
- 2) == 0x8b)
2672 bfd_put_8 (output_bfd
, 0x8d,
2673 contents
+ irel
->r_offset
- 2);
2674 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2675 if (local_got_refcounts
!= NULL
2676 && local_got_refcounts
[r_symndx
] > 0)
2677 local_got_refcounts
[r_symndx
] -= 1;
2678 changed_contents
= TRUE
;
2679 changed_relocs
= TRUE
;
2684 indx
= r_symndx
- symtab_hdr
->sh_info
;
2685 h
= elf_sym_hashes (abfd
)[indx
];
2686 BFD_ASSERT (h
!= NULL
);
2688 while (h
->root
.type
== bfd_link_hash_indirect
2689 || h
->root
.type
== bfd_link_hash_warning
)
2690 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2692 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2693 avoid optimizing _DYNAMIC since ld.so may use its link-time
2696 && h
->type
!= STT_GNU_IFUNC
2697 && h
!= htab
->elf
.hdynamic
2698 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2699 && bfd_get_8 (input_bfd
,
2700 contents
+ irel
->r_offset
- 2) == 0x8b)
2702 bfd_put_8 (output_bfd
, 0x8d,
2703 contents
+ irel
->r_offset
- 2);
2704 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2705 if (h
->got
.refcount
> 0)
2706 h
->got
.refcount
-= 1;
2707 changed_contents
= TRUE
;
2708 changed_relocs
= TRUE
;
2712 if (contents
!= NULL
2713 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2715 if (!changed_contents
&& !link_info
->keep_memory
)
2719 /* Cache the section contents for elf_link_input_bfd. */
2720 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2724 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2726 if (!changed_relocs
)
2727 free (internal_relocs
);
2729 elf_section_data (sec
)->relocs
= internal_relocs
;
2735 if (contents
!= NULL
2736 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2738 if (internal_relocs
!= NULL
2739 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2740 free (internal_relocs
);
2744 /* Set the sizes of the dynamic sections. */
2747 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
2748 struct bfd_link_info
*info
)
2750 struct elf_x86_64_link_hash_table
*htab
;
2755 const struct elf_backend_data
*bed
;
2757 htab
= elf_x86_64_hash_table (info
);
2760 bed
= get_elf_backend_data (output_bfd
);
2762 dynobj
= htab
->elf
.dynobj
;
2766 if (htab
->elf
.dynamic_sections_created
)
2768 /* Set the contents of the .interp section to the interpreter. */
2769 if (info
->executable
)
2771 s
= bfd_get_linker_section (dynobj
, ".interp");
2774 s
->size
= htab
->dynamic_interpreter_size
;
2775 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
2779 /* Set up .got offsets for local syms, and space for local dynamic
2781 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2783 bfd_signed_vma
*local_got
;
2784 bfd_signed_vma
*end_local_got
;
2785 char *local_tls_type
;
2786 bfd_vma
*local_tlsdesc_gotent
;
2787 bfd_size_type locsymcount
;
2788 Elf_Internal_Shdr
*symtab_hdr
;
2791 if (! is_x86_64_elf (ibfd
))
2794 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2796 struct elf_dyn_relocs
*p
;
2798 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
2801 for (p
= (struct elf_dyn_relocs
*)
2802 (elf_section_data (s
)->local_dynrel
);
2806 if (!bfd_is_abs_section (p
->sec
)
2807 && bfd_is_abs_section (p
->sec
->output_section
))
2809 /* Input section has been discarded, either because
2810 it is a copy of a linkonce section or due to
2811 linker script /DISCARD/, so we'll be discarding
2814 else if (p
->count
!= 0)
2816 srel
= elf_section_data (p
->sec
)->sreloc
;
2817 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2818 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2819 && (info
->flags
& DF_TEXTREL
) == 0)
2821 info
->flags
|= DF_TEXTREL
;
2822 if (info
->warn_shared_textrel
&& info
->shared
)
2823 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2824 p
->sec
->owner
, p
->sec
);
2830 local_got
= elf_local_got_refcounts (ibfd
);
2834 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2835 locsymcount
= symtab_hdr
->sh_info
;
2836 end_local_got
= local_got
+ locsymcount
;
2837 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
2838 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
2840 srel
= htab
->elf
.srelgot
;
2841 for (; local_got
< end_local_got
;
2842 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2844 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2847 if (GOT_TLS_GDESC_P (*local_tls_type
))
2849 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2850 - elf_x86_64_compute_jump_table_size (htab
);
2851 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2852 *local_got
= (bfd_vma
) -2;
2854 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2855 || GOT_TLS_GD_P (*local_tls_type
))
2857 *local_got
= s
->size
;
2858 s
->size
+= GOT_ENTRY_SIZE
;
2859 if (GOT_TLS_GD_P (*local_tls_type
))
2860 s
->size
+= GOT_ENTRY_SIZE
;
2863 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2864 || *local_tls_type
== GOT_TLS_IE
)
2866 if (GOT_TLS_GDESC_P (*local_tls_type
))
2868 htab
->elf
.srelplt
->size
2869 += bed
->s
->sizeof_rela
;
2870 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2872 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2873 || GOT_TLS_GD_P (*local_tls_type
))
2874 srel
->size
+= bed
->s
->sizeof_rela
;
2878 *local_got
= (bfd_vma
) -1;
2882 if (htab
->tls_ld_got
.refcount
> 0)
2884 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2886 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
2887 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
2888 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2891 htab
->tls_ld_got
.offset
= -1;
2893 /* Allocate global sym .plt and .got entries, and space for global
2894 sym dynamic relocs. */
2895 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
2898 /* Allocate .plt and .got entries, and space for local symbols. */
2899 htab_traverse (htab
->loc_hash_table
,
2900 elf_x86_64_allocate_local_dynrelocs
,
2903 /* For every jump slot reserved in the sgotplt, reloc_count is
2904 incremented. However, when we reserve space for TLS descriptors,
2905 it's not incremented, so in order to compute the space reserved
2906 for them, it suffices to multiply the reloc count by the jump
2909 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2910 so that R_X86_64_IRELATIVE entries come last. */
2911 if (htab
->elf
.srelplt
)
2913 htab
->sgotplt_jump_table_size
2914 = elf_x86_64_compute_jump_table_size (htab
);
2915 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2917 else if (htab
->elf
.irelplt
)
2918 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2920 if (htab
->tlsdesc_plt
)
2922 /* If we're not using lazy TLS relocations, don't generate the
2923 PLT and GOT entries they require. */
2924 if ((info
->flags
& DF_BIND_NOW
))
2925 htab
->tlsdesc_plt
= 0;
2928 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
2929 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
2930 /* Reserve room for the initial entry.
2931 FIXME: we could probably do away with it in this case. */
2932 if (htab
->elf
.splt
->size
== 0)
2933 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
2934 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
2935 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
2939 if (htab
->elf
.sgotplt
)
2941 /* Don't allocate .got.plt section if there are no GOT nor PLT
2942 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2943 if ((htab
->elf
.hgot
== NULL
2944 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2945 && (htab
->elf
.sgotplt
->size
2946 == get_elf_backend_data (output_bfd
)->got_header_size
)
2947 && (htab
->elf
.splt
== NULL
2948 || htab
->elf
.splt
->size
== 0)
2949 && (htab
->elf
.sgot
== NULL
2950 || htab
->elf
.sgot
->size
== 0)
2951 && (htab
->elf
.iplt
== NULL
2952 || htab
->elf
.iplt
->size
== 0)
2953 && (htab
->elf
.igotplt
== NULL
2954 || htab
->elf
.igotplt
->size
== 0))
2955 htab
->elf
.sgotplt
->size
= 0;
2958 if (htab
->plt_eh_frame
!= NULL
2959 && htab
->elf
.splt
!= NULL
2960 && htab
->elf
.splt
->size
!= 0
2961 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2962 && _bfd_elf_eh_frame_present (info
))
2964 const struct elf_x86_64_backend_data
*arch_data
2965 = get_elf_x86_64_arch_data (bed
);
2966 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
2969 /* We now have determined the sizes of the various dynamic sections.
2970 Allocate memory for them. */
2972 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2974 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2977 if (s
== htab
->elf
.splt
2978 || s
== htab
->elf
.sgot
2979 || s
== htab
->elf
.sgotplt
2980 || s
== htab
->elf
.iplt
2981 || s
== htab
->elf
.igotplt
2982 || s
== htab
->plt_eh_frame
2983 || s
== htab
->sdynbss
)
2985 /* Strip this section if we don't need it; see the
2988 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2990 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
2993 /* We use the reloc_count field as a counter if we need
2994 to copy relocs into the output file. */
2995 if (s
!= htab
->elf
.srelplt
)
3000 /* It's not one of our sections, so don't allocate space. */
3006 /* If we don't need this section, strip it from the
3007 output file. This is mostly to handle .rela.bss and
3008 .rela.plt. We must create both sections in
3009 create_dynamic_sections, because they must be created
3010 before the linker maps input sections to output
3011 sections. The linker does that before
3012 adjust_dynamic_symbol is called, and it is that
3013 function which decides whether anything needs to go
3014 into these sections. */
3016 s
->flags
|= SEC_EXCLUDE
;
3020 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3023 /* Allocate memory for the section contents. We use bfd_zalloc
3024 here in case unused entries are not reclaimed before the
3025 section's contents are written out. This should not happen,
3026 but this way if it does, we get a R_X86_64_NONE reloc instead
3028 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3029 if (s
->contents
== NULL
)
3033 if (htab
->plt_eh_frame
!= NULL
3034 && htab
->plt_eh_frame
->contents
!= NULL
)
3036 const struct elf_x86_64_backend_data
*arch_data
3037 = get_elf_x86_64_arch_data (bed
);
3039 memcpy (htab
->plt_eh_frame
->contents
,
3040 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3041 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3042 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3045 if (htab
->elf
.dynamic_sections_created
)
3047 /* Add some entries to the .dynamic section. We fill in the
3048 values later, in elf_x86_64_finish_dynamic_sections, but we
3049 must add the entries now so that we get the correct size for
3050 the .dynamic section. The DT_DEBUG entry is filled in by the
3051 dynamic linker and used by the debugger. */
3052 #define add_dynamic_entry(TAG, VAL) \
3053 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3055 if (info
->executable
)
3057 if (!add_dynamic_entry (DT_DEBUG
, 0))
3061 if (htab
->elf
.splt
->size
!= 0)
3063 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3064 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3065 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3066 || !add_dynamic_entry (DT_JMPREL
, 0))
3069 if (htab
->tlsdesc_plt
3070 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3071 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3077 if (!add_dynamic_entry (DT_RELA
, 0)
3078 || !add_dynamic_entry (DT_RELASZ
, 0)
3079 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3082 /* If any dynamic relocs apply to a read-only section,
3083 then we need a DT_TEXTREL entry. */
3084 if ((info
->flags
& DF_TEXTREL
) == 0)
3085 elf_link_hash_traverse (&htab
->elf
,
3086 elf_x86_64_readonly_dynrelocs
,
3089 if ((info
->flags
& DF_TEXTREL
) != 0)
3091 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3096 #undef add_dynamic_entry
3102 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3103 struct bfd_link_info
*info
)
3105 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3109 struct elf_link_hash_entry
*tlsbase
;
3111 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3112 "_TLS_MODULE_BASE_",
3113 FALSE
, FALSE
, FALSE
);
3115 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3117 struct elf_x86_64_link_hash_table
*htab
;
3118 struct bfd_link_hash_entry
*bh
= NULL
;
3119 const struct elf_backend_data
*bed
3120 = get_elf_backend_data (output_bfd
);
3122 htab
= elf_x86_64_hash_table (info
);
3126 if (!(_bfd_generic_link_add_one_symbol
3127 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3128 tls_sec
, 0, NULL
, FALSE
,
3129 bed
->collect
, &bh
)))
3132 htab
->tls_module_base
= bh
;
3134 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3135 tlsbase
->def_regular
= 1;
3136 tlsbase
->other
= STV_HIDDEN
;
3137 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3144 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3145 executables. Rather than setting it to the beginning of the TLS
3146 section, we have to set it to the end. This function may be called
3147 multiple times, it is idempotent. */
3150 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3152 struct elf_x86_64_link_hash_table
*htab
;
3153 struct bfd_link_hash_entry
*base
;
3155 if (!info
->executable
)
3158 htab
= elf_x86_64_hash_table (info
);
3162 base
= htab
->tls_module_base
;
3166 base
->u
.def
.value
= htab
->elf
.tls_size
;
3169 /* Return the base VMA address which should be subtracted from real addresses
3170 when resolving @dtpoff relocation.
3171 This is PT_TLS segment p_vaddr. */
3174 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3176 /* If tls_sec is NULL, we should have signalled an error already. */
3177 if (elf_hash_table (info
)->tls_sec
== NULL
)
3179 return elf_hash_table (info
)->tls_sec
->vma
;
3182 /* Return the relocation value for @tpoff relocation
3183 if STT_TLS virtual address is ADDRESS. */
3186 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3188 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3189 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3190 bfd_vma static_tls_size
;
3192 /* If tls_segment is NULL, we should have signalled an error already. */
3193 if (htab
->tls_sec
== NULL
)
3196 /* Consider special static TLS alignment requirements. */
3197 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3198 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3201 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3205 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3207 /* Opcode Instruction
3210 0x0f 0x8x conditional jump */
3212 && (contents
[offset
- 1] == 0xe8
3213 || contents
[offset
- 1] == 0xe9))
3215 && contents
[offset
- 2] == 0x0f
3216 && (contents
[offset
- 1] & 0xf0) == 0x80));
3219 /* Relocate an x86_64 ELF section. */
3222 elf_x86_64_relocate_section (bfd
*output_bfd
,
3223 struct bfd_link_info
*info
,
3225 asection
*input_section
,
3227 Elf_Internal_Rela
*relocs
,
3228 Elf_Internal_Sym
*local_syms
,
3229 asection
**local_sections
)
3231 struct elf_x86_64_link_hash_table
*htab
;
3232 Elf_Internal_Shdr
*symtab_hdr
;
3233 struct elf_link_hash_entry
**sym_hashes
;
3234 bfd_vma
*local_got_offsets
;
3235 bfd_vma
*local_tlsdesc_gotents
;
3236 Elf_Internal_Rela
*rel
;
3237 Elf_Internal_Rela
*relend
;
3238 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3240 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3242 htab
= elf_x86_64_hash_table (info
);
3245 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3246 sym_hashes
= elf_sym_hashes (input_bfd
);
3247 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3248 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3250 elf_x86_64_set_tls_module_base (info
);
3253 relend
= relocs
+ input_section
->reloc_count
;
3254 for (; rel
< relend
; rel
++)
3256 unsigned int r_type
;
3257 reloc_howto_type
*howto
;
3258 unsigned long r_symndx
;
3259 struct elf_link_hash_entry
*h
;
3260 Elf_Internal_Sym
*sym
;
3262 bfd_vma off
, offplt
;
3264 bfd_boolean unresolved_reloc
;
3265 bfd_reloc_status_type r
;
3270 r_type
= ELF32_R_TYPE (rel
->r_info
);
3271 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3272 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3275 if (r_type
>= (int) R_X86_64_standard
)
3277 (*_bfd_error_handler
)
3278 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3279 input_bfd
, input_section
, r_type
);
3280 bfd_set_error (bfd_error_bad_value
);
3284 if (r_type
!= (int) R_X86_64_32
3285 || ABI_64_P (output_bfd
))
3286 howto
= x86_64_elf_howto_table
+ r_type
;
3288 howto
= (x86_64_elf_howto_table
3289 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3290 r_symndx
= htab
->r_sym (rel
->r_info
);
3294 unresolved_reloc
= FALSE
;
3295 if (r_symndx
< symtab_hdr
->sh_info
)
3297 sym
= local_syms
+ r_symndx
;
3298 sec
= local_sections
[r_symndx
];
3300 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3302 st_size
= sym
->st_size
;
3304 /* Relocate against local STT_GNU_IFUNC symbol. */
3305 if (!info
->relocatable
3306 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3308 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3313 /* Set STT_GNU_IFUNC symbol value. */
3314 h
->root
.u
.def
.value
= sym
->st_value
;
3315 h
->root
.u
.def
.section
= sec
;
3320 bfd_boolean warned ATTRIBUTE_UNUSED
;
3321 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3323 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3324 r_symndx
, symtab_hdr
, sym_hashes
,
3326 unresolved_reloc
, warned
, ignored
);
3330 if (sec
!= NULL
&& discarded_section (sec
))
3331 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3332 rel
, 1, relend
, howto
, 0, contents
);
3334 if (info
->relocatable
)
3337 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3339 if (r_type
== R_X86_64_64
)
3341 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3342 zero-extend it to 64bit if addend is zero. */
3343 r_type
= R_X86_64_32
;
3344 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3346 else if (r_type
== R_X86_64_SIZE64
)
3348 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3349 zero-extend it to 64bit if addend is zero. */
3350 r_type
= R_X86_64_SIZE32
;
3351 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3355 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3356 it here if it is defined in a non-shared object. */
3358 && h
->type
== STT_GNU_IFUNC
3365 if ((input_section
->flags
& SEC_ALLOC
) == 0
3366 || h
->plt
.offset
== (bfd_vma
) -1)
3369 /* STT_GNU_IFUNC symbol must go through PLT. */
3370 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
3371 relocation
= (plt
->output_section
->vma
3372 + plt
->output_offset
+ h
->plt
.offset
);
3377 if (h
->root
.root
.string
)
3378 name
= h
->root
.root
.string
;
3380 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3382 (*_bfd_error_handler
)
3383 (_("%B: relocation %s against STT_GNU_IFUNC "
3384 "symbol `%s' isn't handled by %s"), input_bfd
,
3385 x86_64_elf_howto_table
[r_type
].name
,
3386 name
, __FUNCTION__
);
3387 bfd_set_error (bfd_error_bad_value
);
3396 if (ABI_64_P (output_bfd
))
3400 if (rel
->r_addend
!= 0)
3402 if (h
->root
.root
.string
)
3403 name
= h
->root
.root
.string
;
3405 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3407 (*_bfd_error_handler
)
3408 (_("%B: relocation %s against STT_GNU_IFUNC "
3409 "symbol `%s' has non-zero addend: %d"),
3410 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3411 name
, rel
->r_addend
);
3412 bfd_set_error (bfd_error_bad_value
);
3416 /* Generate dynamic relcoation only when there is a
3417 non-GOT reference in a shared object. */
3418 if (info
->shared
&& h
->non_got_ref
)
3420 Elf_Internal_Rela outrel
;
3423 /* Need a dynamic relocation to get the real function
3425 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3429 if (outrel
.r_offset
== (bfd_vma
) -1
3430 || outrel
.r_offset
== (bfd_vma
) -2)
3433 outrel
.r_offset
+= (input_section
->output_section
->vma
3434 + input_section
->output_offset
);
3436 if (h
->dynindx
== -1
3438 || info
->executable
)
3440 /* This symbol is resolved locally. */
3441 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3442 outrel
.r_addend
= (h
->root
.u
.def
.value
3443 + h
->root
.u
.def
.section
->output_section
->vma
3444 + h
->root
.u
.def
.section
->output_offset
);
3448 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3449 outrel
.r_addend
= 0;
3452 sreloc
= htab
->elf
.irelifunc
;
3453 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3455 /* If this reloc is against an external symbol, we
3456 do not want to fiddle with the addend. Otherwise,
3457 we need to include the symbol value so that it
3458 becomes an addend for the dynamic reloc. For an
3459 internal symbol, we have updated addend. */
3464 case R_X86_64_PC32_BND
:
3466 case R_X86_64_PLT32
:
3467 case R_X86_64_PLT32_BND
:
3470 case R_X86_64_GOTPCREL
:
3471 case R_X86_64_GOTPCREL64
:
3472 base_got
= htab
->elf
.sgot
;
3473 off
= h
->got
.offset
;
3475 if (base_got
== NULL
)
3478 if (off
== (bfd_vma
) -1)
3480 /* We can't use h->got.offset here to save state, or
3481 even just remember the offset, as finish_dynamic_symbol
3482 would use that as offset into .got. */
3484 if (htab
->elf
.splt
!= NULL
)
3486 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3487 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3488 base_got
= htab
->elf
.sgotplt
;
3492 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3493 off
= plt_index
* GOT_ENTRY_SIZE
;
3494 base_got
= htab
->elf
.igotplt
;
3497 if (h
->dynindx
== -1
3501 /* This references the local defitionion. We must
3502 initialize this entry in the global offset table.
3503 Since the offset must always be a multiple of 8,
3504 we use the least significant bit to record
3505 whether we have initialized it already.
3507 When doing a dynamic link, we create a .rela.got
3508 relocation entry to initialize the value. This
3509 is done in the finish_dynamic_symbol routine. */
3514 bfd_put_64 (output_bfd
, relocation
,
3515 base_got
->contents
+ off
);
3516 /* Note that this is harmless for the GOTPLT64
3517 case, as -1 | 1 still is -1. */
3523 relocation
= (base_got
->output_section
->vma
3524 + base_got
->output_offset
+ off
);
3530 /* When generating a shared object, the relocations handled here are
3531 copied into the output file to be resolved at run time. */
3534 case R_X86_64_GOT32
:
3535 case R_X86_64_GOT64
:
3536 /* Relocation is to the entry for this symbol in the global
3538 case R_X86_64_GOTPCREL
:
3539 case R_X86_64_GOTPCREL64
:
3540 /* Use global offset table entry as symbol value. */
3541 case R_X86_64_GOTPLT64
:
3542 /* This is the same as GOT64 for relocation purposes, but
3543 indicates the existence of a PLT entry. The difficulty is,
3544 that we must calculate the GOT slot offset from the PLT
3545 offset, if this symbol got a PLT entry (it was global).
3546 Additionally if it's computed from the PLT entry, then that
3547 GOT offset is relative to .got.plt, not to .got. */
3548 base_got
= htab
->elf
.sgot
;
3550 if (htab
->elf
.sgot
== NULL
)
3557 off
= h
->got
.offset
;
3559 && h
->plt
.offset
!= (bfd_vma
)-1
3560 && off
== (bfd_vma
)-1)
3562 /* We can't use h->got.offset here to save
3563 state, or even just remember the offset, as
3564 finish_dynamic_symbol would use that as offset into
3566 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3567 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3568 base_got
= htab
->elf
.sgotplt
;
3571 dyn
= htab
->elf
.dynamic_sections_created
;
3573 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3575 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3576 || (ELF_ST_VISIBILITY (h
->other
)
3577 && h
->root
.type
== bfd_link_hash_undefweak
))
3579 /* This is actually a static link, or it is a -Bsymbolic
3580 link and the symbol is defined locally, or the symbol
3581 was forced to be local because of a version file. We
3582 must initialize this entry in the global offset table.
3583 Since the offset must always be a multiple of 8, we
3584 use the least significant bit to record whether we
3585 have initialized it already.
3587 When doing a dynamic link, we create a .rela.got
3588 relocation entry to initialize the value. This is
3589 done in the finish_dynamic_symbol routine. */
3594 bfd_put_64 (output_bfd
, relocation
,
3595 base_got
->contents
+ off
);
3596 /* Note that this is harmless for the GOTPLT64 case,
3597 as -1 | 1 still is -1. */
3602 unresolved_reloc
= FALSE
;
3606 if (local_got_offsets
== NULL
)
3609 off
= local_got_offsets
[r_symndx
];
3611 /* The offset must always be a multiple of 8. We use
3612 the least significant bit to record whether we have
3613 already generated the necessary reloc. */
3618 bfd_put_64 (output_bfd
, relocation
,
3619 base_got
->contents
+ off
);
3624 Elf_Internal_Rela outrel
;
3626 /* We need to generate a R_X86_64_RELATIVE reloc
3627 for the dynamic linker. */
3628 s
= htab
->elf
.srelgot
;
3632 outrel
.r_offset
= (base_got
->output_section
->vma
3633 + base_got
->output_offset
3635 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3636 outrel
.r_addend
= relocation
;
3637 elf_append_rela (output_bfd
, s
, &outrel
);
3640 local_got_offsets
[r_symndx
] |= 1;
3644 if (off
>= (bfd_vma
) -2)
3647 relocation
= base_got
->output_section
->vma
3648 + base_got
->output_offset
+ off
;
3649 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
3650 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3651 - htab
->elf
.sgotplt
->output_offset
;
3655 case R_X86_64_GOTOFF64
:
3656 /* Relocation is relative to the start of the global offset
3659 /* Check to make sure it isn't a protected function symbol
3660 for shared library since it may not be local when used
3661 as function address. */
3662 if (!info
->executable
3664 && !SYMBOLIC_BIND (info
, h
)
3666 && h
->type
== STT_FUNC
3667 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3669 (*_bfd_error_handler
)
3670 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3671 input_bfd
, h
->root
.root
.string
);
3672 bfd_set_error (bfd_error_bad_value
);
3676 /* Note that sgot is not involved in this
3677 calculation. We always want the start of .got.plt. If we
3678 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3679 permitted by the ABI, we might have to change this
3681 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3682 + htab
->elf
.sgotplt
->output_offset
;
3685 case R_X86_64_GOTPC32
:
3686 case R_X86_64_GOTPC64
:
3687 /* Use global offset table as symbol value. */
3688 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3689 + htab
->elf
.sgotplt
->output_offset
;
3690 unresolved_reloc
= FALSE
;
3693 case R_X86_64_PLTOFF64
:
3694 /* Relocation is PLT entry relative to GOT. For local
3695 symbols it's the symbol itself relative to GOT. */
3697 /* See PLT32 handling. */
3698 && h
->plt
.offset
!= (bfd_vma
) -1
3699 && htab
->elf
.splt
!= NULL
)
3701 relocation
= (htab
->elf
.splt
->output_section
->vma
3702 + htab
->elf
.splt
->output_offset
3704 unresolved_reloc
= FALSE
;
3707 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3708 + htab
->elf
.sgotplt
->output_offset
;
3711 case R_X86_64_PLT32
:
3712 case R_X86_64_PLT32_BND
:
3713 /* Relocation is to the entry for this symbol in the
3714 procedure linkage table. */
3716 /* Resolve a PLT32 reloc against a local symbol directly,
3717 without using the procedure linkage table. */
3721 if (h
->plt
.offset
== (bfd_vma
) -1
3722 || htab
->elf
.splt
== NULL
)
3724 /* We didn't make a PLT entry for this symbol. This
3725 happens when statically linking PIC code, or when
3726 using -Bsymbolic. */
3730 relocation
= (htab
->elf
.splt
->output_section
->vma
3731 + htab
->elf
.splt
->output_offset
3733 unresolved_reloc
= FALSE
;
3736 case R_X86_64_SIZE32
:
3737 case R_X86_64_SIZE64
:
3738 /* Set to symbol size. */
3739 relocation
= st_size
;
3745 case R_X86_64_PC32_BND
:
3747 && (input_section
->flags
& SEC_ALLOC
) != 0
3748 && (input_section
->flags
& SEC_READONLY
) != 0
3751 bfd_boolean fail
= FALSE
;
3753 = ((r_type
== R_X86_64_PC32
3754 || r_type
== R_X86_64_PC32_BND
)
3755 && is_32bit_relative_branch (contents
, rel
->r_offset
));
3757 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
3759 /* Symbol is referenced locally. Make sure it is
3760 defined locally or for a branch. */
3761 fail
= !h
->def_regular
&& !branch
;
3765 /* Symbol isn't referenced locally. We only allow
3766 branch to symbol with non-default visibility. */
3768 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
3775 const char *pic
= "";
3777 switch (ELF_ST_VISIBILITY (h
->other
))
3780 v
= _("hidden symbol");
3783 v
= _("internal symbol");
3786 v
= _("protected symbol");
3790 pic
= _("; recompile with -fPIC");
3795 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3797 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3799 (*_bfd_error_handler
) (fmt
, input_bfd
,
3800 x86_64_elf_howto_table
[r_type
].name
,
3801 v
, h
->root
.root
.string
, pic
);
3802 bfd_set_error (bfd_error_bad_value
);
3813 /* FIXME: The ABI says the linker should make sure the value is
3814 the same when it's zeroextended to 64 bit. */
3817 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3822 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3823 || h
->root
.type
!= bfd_link_hash_undefweak
)
3824 && ((! IS_X86_64_PCREL_TYPE (r_type
)
3825 && r_type
!= R_X86_64_SIZE32
3826 && r_type
!= R_X86_64_SIZE64
)
3827 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
3828 || (ELIMINATE_COPY_RELOCS
3835 || h
->root
.type
== bfd_link_hash_undefweak
3836 || h
->root
.type
== bfd_link_hash_undefined
)))
3838 Elf_Internal_Rela outrel
;
3839 bfd_boolean skip
, relocate
;
3842 /* When generating a shared object, these relocations
3843 are copied into the output file to be resolved at run
3849 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3851 if (outrel
.r_offset
== (bfd_vma
) -1)
3853 else if (outrel
.r_offset
== (bfd_vma
) -2)
3854 skip
= TRUE
, relocate
= TRUE
;
3856 outrel
.r_offset
+= (input_section
->output_section
->vma
3857 + input_section
->output_offset
);
3860 memset (&outrel
, 0, sizeof outrel
);
3862 /* h->dynindx may be -1 if this symbol was marked to
3866 && (IS_X86_64_PCREL_TYPE (r_type
)
3868 || ! SYMBOLIC_BIND (info
, h
)
3869 || ! h
->def_regular
))
3871 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3872 outrel
.r_addend
= rel
->r_addend
;
3876 /* This symbol is local, or marked to become local. */
3877 if (r_type
== htab
->pointer_r_type
)
3880 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3881 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3883 else if (r_type
== R_X86_64_64
3884 && !ABI_64_P (output_bfd
))
3887 outrel
.r_info
= htab
->r_info (0,
3888 R_X86_64_RELATIVE64
);
3889 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3890 /* Check addend overflow. */
3891 if ((outrel
.r_addend
& 0x80000000)
3892 != (rel
->r_addend
& 0x80000000))
3895 int addend
= rel
->r_addend
;
3896 if (h
&& h
->root
.root
.string
)
3897 name
= h
->root
.root
.string
;
3899 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3902 (*_bfd_error_handler
)
3903 (_("%B: addend -0x%x in relocation %s against "
3904 "symbol `%s' at 0x%lx in section `%A' is "
3906 input_bfd
, input_section
, addend
,
3907 x86_64_elf_howto_table
[r_type
].name
,
3908 name
, (unsigned long) rel
->r_offset
);
3910 (*_bfd_error_handler
)
3911 (_("%B: addend 0x%x in relocation %s against "
3912 "symbol `%s' at 0x%lx in section `%A' is "
3914 input_bfd
, input_section
, addend
,
3915 x86_64_elf_howto_table
[r_type
].name
,
3916 name
, (unsigned long) rel
->r_offset
);
3917 bfd_set_error (bfd_error_bad_value
);
3925 if (bfd_is_abs_section (sec
))
3927 else if (sec
== NULL
|| sec
->owner
== NULL
)
3929 bfd_set_error (bfd_error_bad_value
);
3936 /* We are turning this relocation into one
3937 against a section symbol. It would be
3938 proper to subtract the symbol's value,
3939 osec->vma, from the emitted reloc addend,
3940 but ld.so expects buggy relocs. */
3941 osec
= sec
->output_section
;
3942 sindx
= elf_section_data (osec
)->dynindx
;
3945 asection
*oi
= htab
->elf
.text_index_section
;
3946 sindx
= elf_section_data (oi
)->dynindx
;
3948 BFD_ASSERT (sindx
!= 0);
3951 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
3952 outrel
.r_addend
= relocation
+ rel
->r_addend
;
3956 sreloc
= elf_section_data (input_section
)->sreloc
;
3958 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3960 r
= bfd_reloc_notsupported
;
3961 goto check_relocation_error
;
3964 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3966 /* If this reloc is against an external symbol, we do
3967 not want to fiddle with the addend. Otherwise, we
3968 need to include the symbol value so that it becomes
3969 an addend for the dynamic reloc. */
3976 case R_X86_64_TLSGD
:
3977 case R_X86_64_GOTPC32_TLSDESC
:
3978 case R_X86_64_TLSDESC_CALL
:
3979 case R_X86_64_GOTTPOFF
:
3980 tls_type
= GOT_UNKNOWN
;
3981 if (h
== NULL
&& local_got_offsets
)
3982 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
3984 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
3986 if (! elf_x86_64_tls_transition (info
, input_bfd
,
3987 input_section
, contents
,
3988 symtab_hdr
, sym_hashes
,
3989 &r_type
, tls_type
, rel
,
3990 relend
, h
, r_symndx
))
3993 if (r_type
== R_X86_64_TPOFF32
)
3995 bfd_vma roff
= rel
->r_offset
;
3997 BFD_ASSERT (! unresolved_reloc
);
3999 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4001 /* GD->LE transition. For 64bit, change
4002 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4003 .word 0x6666; rex64; call __tls_get_addr
4006 leaq foo@tpoff(%rax), %rax
4008 leaq foo@tlsgd(%rip), %rdi
4009 .word 0x6666; rex64; call __tls_get_addr
4012 leaq foo@tpoff(%rax), %rax
4013 For largepic, change:
4014 leaq foo@tlsgd(%rip), %rdi
4015 movabsq $__tls_get_addr@pltoff, %rax
4020 leaq foo@tpoff(%rax), %rax
4021 nopw 0x0(%rax,%rax,1) */
4023 if (ABI_64_P (output_bfd
)
4024 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4026 memcpy (contents
+ roff
- 3,
4027 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4028 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4031 else if (ABI_64_P (output_bfd
))
4032 memcpy (contents
+ roff
- 4,
4033 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4036 memcpy (contents
+ roff
- 3,
4037 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4039 bfd_put_32 (output_bfd
,
4040 elf_x86_64_tpoff (info
, relocation
),
4041 contents
+ roff
+ 8 + largepic
);
4042 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4046 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4048 /* GDesc -> LE transition.
4049 It's originally something like:
4050 leaq x@tlsdesc(%rip), %rax
4053 movl $x@tpoff, %rax. */
4055 unsigned int val
, type
;
4057 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4058 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4059 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4060 contents
+ roff
- 3);
4061 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4062 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4063 contents
+ roff
- 1);
4064 bfd_put_32 (output_bfd
,
4065 elf_x86_64_tpoff (info
, relocation
),
4069 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4071 /* GDesc -> LE transition.
4076 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4077 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4080 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4082 /* IE->LE transition:
4083 Originally it can be one of:
4084 movq foo@gottpoff(%rip), %reg
4085 addq foo@gottpoff(%rip), %reg
4088 leaq foo(%reg), %reg
4091 unsigned int val
, type
, reg
;
4093 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4094 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4095 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4101 bfd_put_8 (output_bfd
, 0x49,
4102 contents
+ roff
- 3);
4103 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4104 bfd_put_8 (output_bfd
, 0x41,
4105 contents
+ roff
- 3);
4106 bfd_put_8 (output_bfd
, 0xc7,
4107 contents
+ roff
- 2);
4108 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4109 contents
+ roff
- 1);
4113 /* addq -> addq - addressing with %rsp/%r12 is
4116 bfd_put_8 (output_bfd
, 0x49,
4117 contents
+ roff
- 3);
4118 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4119 bfd_put_8 (output_bfd
, 0x41,
4120 contents
+ roff
- 3);
4121 bfd_put_8 (output_bfd
, 0x81,
4122 contents
+ roff
- 2);
4123 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4124 contents
+ roff
- 1);
4130 bfd_put_8 (output_bfd
, 0x4d,
4131 contents
+ roff
- 3);
4132 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4133 bfd_put_8 (output_bfd
, 0x45,
4134 contents
+ roff
- 3);
4135 bfd_put_8 (output_bfd
, 0x8d,
4136 contents
+ roff
- 2);
4137 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4138 contents
+ roff
- 1);
4140 bfd_put_32 (output_bfd
,
4141 elf_x86_64_tpoff (info
, relocation
),
4149 if (htab
->elf
.sgot
== NULL
)
4154 off
= h
->got
.offset
;
4155 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4159 if (local_got_offsets
== NULL
)
4162 off
= local_got_offsets
[r_symndx
];
4163 offplt
= local_tlsdesc_gotents
[r_symndx
];
4170 Elf_Internal_Rela outrel
;
4174 if (htab
->elf
.srelgot
== NULL
)
4177 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4179 if (GOT_TLS_GDESC_P (tls_type
))
4181 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4182 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4183 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4184 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4185 + htab
->elf
.sgotplt
->output_offset
4187 + htab
->sgotplt_jump_table_size
);
4188 sreloc
= htab
->elf
.srelplt
;
4190 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4192 outrel
.r_addend
= 0;
4193 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4196 sreloc
= htab
->elf
.srelgot
;
4198 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4199 + htab
->elf
.sgot
->output_offset
+ off
);
4201 if (GOT_TLS_GD_P (tls_type
))
4202 dr_type
= R_X86_64_DTPMOD64
;
4203 else if (GOT_TLS_GDESC_P (tls_type
))
4206 dr_type
= R_X86_64_TPOFF64
;
4208 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4209 outrel
.r_addend
= 0;
4210 if ((dr_type
== R_X86_64_TPOFF64
4211 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4212 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4213 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4215 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4217 if (GOT_TLS_GD_P (tls_type
))
4221 BFD_ASSERT (! unresolved_reloc
);
4222 bfd_put_64 (output_bfd
,
4223 relocation
- elf_x86_64_dtpoff_base (info
),
4224 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4228 bfd_put_64 (output_bfd
, 0,
4229 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4230 outrel
.r_info
= htab
->r_info (indx
,
4232 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4233 elf_append_rela (output_bfd
, sreloc
,
4242 local_got_offsets
[r_symndx
] |= 1;
4245 if (off
>= (bfd_vma
) -2
4246 && ! GOT_TLS_GDESC_P (tls_type
))
4248 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4250 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4251 || r_type
== R_X86_64_TLSDESC_CALL
)
4252 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4253 + htab
->elf
.sgotplt
->output_offset
4254 + offplt
+ htab
->sgotplt_jump_table_size
;
4256 relocation
= htab
->elf
.sgot
->output_section
->vma
4257 + htab
->elf
.sgot
->output_offset
+ off
;
4258 unresolved_reloc
= FALSE
;
4262 bfd_vma roff
= rel
->r_offset
;
4264 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4266 /* GD->IE transition. For 64bit, change
4267 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4268 .word 0x6666; rex64; call __tls_get_addr@plt
4271 addq foo@gottpoff(%rip), %rax
4273 leaq foo@tlsgd(%rip), %rdi
4274 .word 0x6666; rex64; call __tls_get_addr@plt
4277 addq foo@gottpoff(%rip), %rax
4278 For largepic, change:
4279 leaq foo@tlsgd(%rip), %rdi
4280 movabsq $__tls_get_addr@pltoff, %rax
4285 addq foo@gottpoff(%rax), %rax
4286 nopw 0x0(%rax,%rax,1) */
4288 if (ABI_64_P (output_bfd
)
4289 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4291 memcpy (contents
+ roff
- 3,
4292 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4293 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4296 else if (ABI_64_P (output_bfd
))
4297 memcpy (contents
+ roff
- 4,
4298 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4301 memcpy (contents
+ roff
- 3,
4302 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4305 relocation
= (htab
->elf
.sgot
->output_section
->vma
4306 + htab
->elf
.sgot
->output_offset
+ off
4309 - input_section
->output_section
->vma
4310 - input_section
->output_offset
4312 bfd_put_32 (output_bfd
, relocation
,
4313 contents
+ roff
+ 8 + largepic
);
4314 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4318 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4320 /* GDesc -> IE transition.
4321 It's originally something like:
4322 leaq x@tlsdesc(%rip), %rax
4325 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4327 /* Now modify the instruction as appropriate. To
4328 turn a leaq into a movq in the form we use it, it
4329 suffices to change the second byte from 0x8d to
4331 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4333 bfd_put_32 (output_bfd
,
4334 htab
->elf
.sgot
->output_section
->vma
4335 + htab
->elf
.sgot
->output_offset
+ off
4337 - input_section
->output_section
->vma
4338 - input_section
->output_offset
4343 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4345 /* GDesc -> IE transition.
4352 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4353 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4361 case R_X86_64_TLSLD
:
4362 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4363 input_section
, contents
,
4364 symtab_hdr
, sym_hashes
,
4365 &r_type
, GOT_UNKNOWN
,
4366 rel
, relend
, h
, r_symndx
))
4369 if (r_type
!= R_X86_64_TLSLD
)
4371 /* LD->LE transition:
4372 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4373 For 64bit, we change it into:
4374 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4375 For 32bit, we change it into:
4376 nopl 0x0(%rax); movl %fs:0, %eax.
4377 For largepic, change:
4378 leaq foo@tlsgd(%rip), %rdi
4379 movabsq $__tls_get_addr@pltoff, %rax
4383 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4386 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4387 if (ABI_64_P (output_bfd
)
4388 && contents
[rel
->r_offset
+ 5] == (bfd_byte
) '\xb8')
4389 memcpy (contents
+ rel
->r_offset
- 3,
4390 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4391 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4392 else if (ABI_64_P (output_bfd
))
4393 memcpy (contents
+ rel
->r_offset
- 3,
4394 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4396 memcpy (contents
+ rel
->r_offset
- 3,
4397 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4398 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4403 if (htab
->elf
.sgot
== NULL
)
4406 off
= htab
->tls_ld_got
.offset
;
4411 Elf_Internal_Rela outrel
;
4413 if (htab
->elf
.srelgot
== NULL
)
4416 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4417 + htab
->elf
.sgot
->output_offset
+ off
);
4419 bfd_put_64 (output_bfd
, 0,
4420 htab
->elf
.sgot
->contents
+ off
);
4421 bfd_put_64 (output_bfd
, 0,
4422 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4423 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4424 outrel
.r_addend
= 0;
4425 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4427 htab
->tls_ld_got
.offset
|= 1;
4429 relocation
= htab
->elf
.sgot
->output_section
->vma
4430 + htab
->elf
.sgot
->output_offset
+ off
;
4431 unresolved_reloc
= FALSE
;
4434 case R_X86_64_DTPOFF32
:
4435 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4436 relocation
-= elf_x86_64_dtpoff_base (info
);
4438 relocation
= elf_x86_64_tpoff (info
, relocation
);
4441 case R_X86_64_TPOFF32
:
4442 case R_X86_64_TPOFF64
:
4443 BFD_ASSERT (info
->executable
);
4444 relocation
= elf_x86_64_tpoff (info
, relocation
);
4447 case R_X86_64_DTPOFF64
:
4448 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4449 relocation
-= elf_x86_64_dtpoff_base (info
);
4456 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4457 because such sections are not SEC_ALLOC and thus ld.so will
4458 not process them. */
4459 if (unresolved_reloc
4460 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4462 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4463 rel
->r_offset
) != (bfd_vma
) -1)
4465 (*_bfd_error_handler
)
4466 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4469 (long) rel
->r_offset
,
4471 h
->root
.root
.string
);
4476 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4477 contents
, rel
->r_offset
,
4478 relocation
, rel
->r_addend
);
4480 check_relocation_error
:
4481 if (r
!= bfd_reloc_ok
)
4486 name
= h
->root
.root
.string
;
4489 name
= bfd_elf_string_from_elf_section (input_bfd
,
4490 symtab_hdr
->sh_link
,
4495 name
= bfd_section_name (input_bfd
, sec
);
4498 if (r
== bfd_reloc_overflow
)
4500 if (! ((*info
->callbacks
->reloc_overflow
)
4501 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4502 (bfd_vma
) 0, input_bfd
, input_section
,
4508 (*_bfd_error_handler
)
4509 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4510 input_bfd
, input_section
,
4511 (long) rel
->r_offset
, name
, (int) r
);
4520 /* Finish up dynamic symbol handling. We set the contents of various
4521 dynamic sections here. */
4524 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4525 struct bfd_link_info
*info
,
4526 struct elf_link_hash_entry
*h
,
4527 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4529 struct elf_x86_64_link_hash_table
*htab
;
4530 const struct elf_x86_64_backend_data
*const abed
4531 = get_elf_x86_64_backend_data (output_bfd
);
4533 htab
= elf_x86_64_hash_table (info
);
4537 if (h
->plt
.offset
!= (bfd_vma
) -1)
4541 Elf_Internal_Rela rela
;
4543 asection
*plt
, *gotplt
, *relplt
;
4544 const struct elf_backend_data
*bed
;
4546 /* When building a static executable, use .iplt, .igot.plt and
4547 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4548 if (htab
->elf
.splt
!= NULL
)
4550 plt
= htab
->elf
.splt
;
4551 gotplt
= htab
->elf
.sgotplt
;
4552 relplt
= htab
->elf
.srelplt
;
4556 plt
= htab
->elf
.iplt
;
4557 gotplt
= htab
->elf
.igotplt
;
4558 relplt
= htab
->elf
.irelplt
;
4561 /* This symbol has an entry in the procedure linkage table. Set
4563 if ((h
->dynindx
== -1
4564 && !((h
->forced_local
|| info
->executable
)
4566 && h
->type
== STT_GNU_IFUNC
))
4572 /* Get the index in the procedure linkage table which
4573 corresponds to this symbol. This is the index of this symbol
4574 in all the symbols for which we are making plt entries. The
4575 first entry in the procedure linkage table is reserved.
4577 Get the offset into the .got table of the entry that
4578 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4579 bytes. The first three are reserved for the dynamic linker.
4581 For static executables, we don't reserve anything. */
4583 if (plt
== htab
->elf
.splt
)
4585 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
4586 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4590 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
4591 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4594 /* Fill in the entry in the procedure linkage table. */
4595 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
4596 abed
->plt_entry_size
);
4598 /* Insert the relocation positions of the plt section. */
4600 /* Put offset the PC-relative instruction referring to the GOT entry,
4601 subtracting the size of that instruction. */
4602 bfd_put_32 (output_bfd
,
4603 (gotplt
->output_section
->vma
4604 + gotplt
->output_offset
4606 - plt
->output_section
->vma
4607 - plt
->output_offset
4609 - abed
->plt_got_insn_size
),
4610 plt
->contents
+ h
->plt
.offset
+ abed
->plt_got_offset
);
4612 /* Fill in the entry in the global offset table, initially this
4613 points to the second part of the PLT entry. */
4614 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4615 + plt
->output_offset
4616 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
4617 gotplt
->contents
+ got_offset
);
4619 /* Fill in the entry in the .rela.plt section. */
4620 rela
.r_offset
= (gotplt
->output_section
->vma
4621 + gotplt
->output_offset
4623 if (h
->dynindx
== -1
4624 || ((info
->executable
4625 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4627 && h
->type
== STT_GNU_IFUNC
))
4629 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4630 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4631 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
4632 rela
.r_addend
= (h
->root
.u
.def
.value
4633 + h
->root
.u
.def
.section
->output_section
->vma
4634 + h
->root
.u
.def
.section
->output_offset
);
4635 /* R_X86_64_IRELATIVE comes last. */
4636 plt_index
= htab
->next_irelative_index
--;
4640 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
4642 plt_index
= htab
->next_jump_slot_index
++;
4645 /* Don't fill PLT entry for static executables. */
4646 if (plt
== htab
->elf
.splt
)
4648 /* Put relocation index. */
4649 bfd_put_32 (output_bfd
, plt_index
,
4650 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
4651 /* Put offset for jmp .PLT0. */
4652 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ abed
->plt_plt_insn_end
),
4653 plt
->contents
+ h
->plt
.offset
+ abed
->plt_plt_offset
);
4656 bed
= get_elf_backend_data (output_bfd
);
4657 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
4658 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
4660 if (!h
->def_regular
)
4662 /* Mark the symbol as undefined, rather than as defined in
4663 the .plt section. Leave the value if there were any
4664 relocations where pointer equality matters (this is a clue
4665 for the dynamic linker, to make function pointer
4666 comparisons work between an application and shared
4667 library), otherwise set it to zero. If a function is only
4668 called from a binary, there is no need to slow down
4669 shared libraries because of that. */
4670 sym
->st_shndx
= SHN_UNDEF
;
4671 if (!h
->pointer_equality_needed
)
4676 if (h
->got
.offset
!= (bfd_vma
) -1
4677 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
4678 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
4680 Elf_Internal_Rela rela
;
4682 /* This symbol has an entry in the global offset table. Set it
4684 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4687 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4688 + htab
->elf
.sgot
->output_offset
4689 + (h
->got
.offset
&~ (bfd_vma
) 1));
4691 /* If this is a static link, or it is a -Bsymbolic link and the
4692 symbol is defined locally or was forced to be local because
4693 of a version file, we just want to emit a RELATIVE reloc.
4694 The entry in the global offset table will already have been
4695 initialized in the relocate_section function. */
4697 && h
->type
== STT_GNU_IFUNC
)
4701 /* Generate R_X86_64_GLOB_DAT. */
4708 if (!h
->pointer_equality_needed
)
4711 /* For non-shared object, we can't use .got.plt, which
4712 contains the real function addres if we need pointer
4713 equality. We load the GOT entry with the PLT entry. */
4714 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4715 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
4716 + plt
->output_offset
4718 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4722 else if (info
->shared
4723 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4725 if (!h
->def_regular
)
4727 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4728 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4729 rela
.r_addend
= (h
->root
.u
.def
.value
4730 + h
->root
.u
.def
.section
->output_section
->vma
4731 + h
->root
.u
.def
.section
->output_offset
);
4735 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4737 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4738 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4739 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
4743 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
4748 Elf_Internal_Rela rela
;
4750 /* This symbol needs a copy reloc. Set it up. */
4752 if (h
->dynindx
== -1
4753 || (h
->root
.type
!= bfd_link_hash_defined
4754 && h
->root
.type
!= bfd_link_hash_defweak
)
4755 || htab
->srelbss
== NULL
)
4758 rela
.r_offset
= (h
->root
.u
.def
.value
4759 + h
->root
.u
.def
.section
->output_section
->vma
4760 + h
->root
.u
.def
.section
->output_offset
);
4761 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
4763 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
4769 /* Finish up local dynamic symbol handling. We set the contents of
4770 various dynamic sections here. */
4773 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
4775 struct elf_link_hash_entry
*h
4776 = (struct elf_link_hash_entry
*) *slot
;
4777 struct bfd_link_info
*info
4778 = (struct bfd_link_info
*) inf
;
4780 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
4784 /* Used to decide how to sort relocs in an optimal manner for the
4785 dynamic linker, before writing them out. */
4787 static enum elf_reloc_type_class
4788 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4789 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4790 const Elf_Internal_Rela
*rela
)
4792 switch ((int) ELF32_R_TYPE (rela
->r_info
))
4794 case R_X86_64_RELATIVE
:
4795 case R_X86_64_RELATIVE64
:
4796 return reloc_class_relative
;
4797 case R_X86_64_JUMP_SLOT
:
4798 return reloc_class_plt
;
4800 return reloc_class_copy
;
4802 return reloc_class_normal
;
4806 /* Finish up the dynamic sections. */
4809 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
4810 struct bfd_link_info
*info
)
4812 struct elf_x86_64_link_hash_table
*htab
;
4815 const struct elf_x86_64_backend_data
*const abed
4816 = get_elf_x86_64_backend_data (output_bfd
);
4818 htab
= elf_x86_64_hash_table (info
);
4822 dynobj
= htab
->elf
.dynobj
;
4823 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4825 if (htab
->elf
.dynamic_sections_created
)
4827 bfd_byte
*dyncon
, *dynconend
;
4828 const struct elf_backend_data
*bed
;
4829 bfd_size_type sizeof_dyn
;
4831 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4834 bed
= get_elf_backend_data (dynobj
);
4835 sizeof_dyn
= bed
->s
->sizeof_dyn
;
4836 dyncon
= sdyn
->contents
;
4837 dynconend
= sdyn
->contents
+ sdyn
->size
;
4838 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
4840 Elf_Internal_Dyn dyn
;
4843 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
4851 s
= htab
->elf
.sgotplt
;
4852 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4856 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
4860 s
= htab
->elf
.srelplt
->output_section
;
4861 dyn
.d_un
.d_val
= s
->size
;
4865 /* The procedure linkage table relocs (DT_JMPREL) should
4866 not be included in the overall relocs (DT_RELA).
4867 Therefore, we override the DT_RELASZ entry here to
4868 make it not include the JMPREL relocs. Since the
4869 linker script arranges for .rela.plt to follow all
4870 other relocation sections, we don't have to worry
4871 about changing the DT_RELA entry. */
4872 if (htab
->elf
.srelplt
!= NULL
)
4874 s
= htab
->elf
.srelplt
->output_section
;
4875 dyn
.d_un
.d_val
-= s
->size
;
4879 case DT_TLSDESC_PLT
:
4881 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4882 + htab
->tlsdesc_plt
;
4885 case DT_TLSDESC_GOT
:
4887 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
4888 + htab
->tlsdesc_got
;
4892 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
4895 /* Fill in the special first entry in the procedure linkage table. */
4896 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4898 /* Fill in the first entry in the procedure linkage table. */
4899 memcpy (htab
->elf
.splt
->contents
,
4900 abed
->plt0_entry
, abed
->plt_entry_size
);
4901 /* Add offset for pushq GOT+8(%rip), since the instruction
4902 uses 6 bytes subtract this value. */
4903 bfd_put_32 (output_bfd
,
4904 (htab
->elf
.sgotplt
->output_section
->vma
4905 + htab
->elf
.sgotplt
->output_offset
4907 - htab
->elf
.splt
->output_section
->vma
4908 - htab
->elf
.splt
->output_offset
4910 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
4911 /* Add offset for the PC-relative instruction accessing GOT+16,
4912 subtracting the offset to the end of that instruction. */
4913 bfd_put_32 (output_bfd
,
4914 (htab
->elf
.sgotplt
->output_section
->vma
4915 + htab
->elf
.sgotplt
->output_offset
4917 - htab
->elf
.splt
->output_section
->vma
4918 - htab
->elf
.splt
->output_offset
4919 - abed
->plt0_got2_insn_end
),
4920 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
4922 elf_section_data (htab
->elf
.splt
->output_section
)
4923 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
4925 if (htab
->tlsdesc_plt
)
4927 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
4928 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
4930 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
4931 abed
->plt0_entry
, abed
->plt_entry_size
);
4933 /* Add offset for pushq GOT+8(%rip), since the
4934 instruction uses 6 bytes subtract this value. */
4935 bfd_put_32 (output_bfd
,
4936 (htab
->elf
.sgotplt
->output_section
->vma
4937 + htab
->elf
.sgotplt
->output_offset
4939 - htab
->elf
.splt
->output_section
->vma
4940 - htab
->elf
.splt
->output_offset
4943 htab
->elf
.splt
->contents
4944 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
4945 /* Add offset for the PC-relative instruction accessing GOT+TDG,
4946 where TGD stands for htab->tlsdesc_got, subtracting the offset
4947 to the end of that instruction. */
4948 bfd_put_32 (output_bfd
,
4949 (htab
->elf
.sgot
->output_section
->vma
4950 + htab
->elf
.sgot
->output_offset
4952 - htab
->elf
.splt
->output_section
->vma
4953 - htab
->elf
.splt
->output_offset
4955 - abed
->plt0_got2_insn_end
),
4956 htab
->elf
.splt
->contents
4957 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
4962 if (htab
->elf
.sgotplt
)
4964 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4966 (*_bfd_error_handler
)
4967 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4971 /* Fill in the first three entries in the global offset table. */
4972 if (htab
->elf
.sgotplt
->size
> 0)
4974 /* Set the first entry in the global offset table to the address of
4975 the dynamic section. */
4977 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
4979 bfd_put_64 (output_bfd
,
4980 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
4981 htab
->elf
.sgotplt
->contents
);
4982 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4983 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
4984 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
4987 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
4991 /* Adjust .eh_frame for .plt section. */
4992 if (htab
->plt_eh_frame
!= NULL
4993 && htab
->plt_eh_frame
->contents
!= NULL
)
4995 if (htab
->elf
.splt
!= NULL
4996 && htab
->elf
.splt
->size
!= 0
4997 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4998 && htab
->elf
.splt
->output_section
!= NULL
4999 && htab
->plt_eh_frame
->output_section
!= NULL
)
5001 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5002 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5003 + htab
->plt_eh_frame
->output_offset
5004 + PLT_FDE_START_OFFSET
;
5005 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5006 htab
->plt_eh_frame
->contents
5007 + PLT_FDE_START_OFFSET
);
5009 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5011 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5013 htab
->plt_eh_frame
->contents
))
5018 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5019 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
5022 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5023 htab_traverse (htab
->loc_hash_table
,
5024 elf_x86_64_finish_local_dynamic_symbol
,
5030 /* Return address for Ith PLT stub in section PLT, for relocation REL
5031 or (bfd_vma) -1 if it should not be included. */
5034 elf_x86_64_plt_sym_val (bfd_vma i
, const asection
*plt
,
5035 const arelent
*rel ATTRIBUTE_UNUSED
)
5037 return plt
->vma
+ (i
+ 1) * GET_PLT_ENTRY_SIZE (plt
->owner
);
5040 /* Handle an x86-64 specific section when reading an object file. This
5041 is called when elfcode.h finds a section with an unknown type. */
5044 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
5045 const char *name
, int shindex
)
5047 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
5050 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
5056 /* Hook called by the linker routine which adds symbols from an object
5057 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5061 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5062 struct bfd_link_info
*info
,
5063 Elf_Internal_Sym
*sym
,
5064 const char **namep ATTRIBUTE_UNUSED
,
5065 flagword
*flagsp ATTRIBUTE_UNUSED
,
5071 switch (sym
->st_shndx
)
5073 case SHN_X86_64_LCOMMON
:
5074 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5077 lcomm
= bfd_make_section_with_flags (abfd
,
5081 | SEC_LINKER_CREATED
));
5084 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5087 *valp
= sym
->st_size
;
5091 if ((abfd
->flags
& DYNAMIC
) == 0
5092 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5093 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
5094 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5100 /* Given a BFD section, try to locate the corresponding ELF section
5104 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5105 asection
*sec
, int *index_return
)
5107 if (sec
== &_bfd_elf_large_com_section
)
5109 *index_return
= SHN_X86_64_LCOMMON
;
5115 /* Process a symbol. */
5118 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5121 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5123 switch (elfsym
->internal_elf_sym
.st_shndx
)
5125 case SHN_X86_64_LCOMMON
:
5126 asym
->section
= &_bfd_elf_large_com_section
;
5127 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5128 /* Common symbol doesn't set BSF_GLOBAL. */
5129 asym
->flags
&= ~BSF_GLOBAL
;
5135 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5137 return (sym
->st_shndx
== SHN_COMMON
5138 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5142 elf_x86_64_common_section_index (asection
*sec
)
5144 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5147 return SHN_X86_64_LCOMMON
;
5151 elf_x86_64_common_section (asection
*sec
)
5153 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5154 return bfd_com_section_ptr
;
5156 return &_bfd_elf_large_com_section
;
5160 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5161 const Elf_Internal_Sym
*sym
,
5166 const asection
*oldsec
)
5168 /* A normal common symbol and a large common symbol result in a
5169 normal common symbol. We turn the large common symbol into a
5172 && h
->root
.type
== bfd_link_hash_common
5174 && bfd_is_com_section (*psec
)
5177 if (sym
->st_shndx
== SHN_COMMON
5178 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5180 h
->root
.u
.c
.p
->section
5181 = bfd_make_section_old_way (oldbfd
, "COMMON");
5182 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5184 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5185 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5186 *psec
= bfd_com_section_ptr
;
5193 elf_x86_64_additional_program_headers (bfd
*abfd
,
5194 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5199 /* Check to see if we need a large readonly segment. */
5200 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5201 if (s
&& (s
->flags
& SEC_LOAD
))
5204 /* Check to see if we need a large data segment. Since .lbss sections
5205 is placed right after the .bss section, there should be no need for
5206 a large data segment just because of .lbss. */
5207 s
= bfd_get_section_by_name (abfd
, ".ldata");
5208 if (s
&& (s
->flags
& SEC_LOAD
))
5214 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5217 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5219 if (h
->plt
.offset
!= (bfd_vma
) -1
5221 && !h
->pointer_equality_needed
)
5224 return _bfd_elf_hash_symbol (h
);
5227 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5230 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5231 const bfd_target
*output
)
5233 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5234 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5235 && _bfd_elf_relocs_compatible (input
, output
));
5238 static const struct bfd_elf_special_section
5239 elf_x86_64_special_sections
[]=
5241 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5242 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5243 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5244 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5245 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5246 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5247 { NULL
, 0, 0, 0, 0 }
5250 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
5251 #define TARGET_LITTLE_NAME "elf64-x86-64"
5252 #define ELF_ARCH bfd_arch_i386
5253 #define ELF_TARGET_ID X86_64_ELF_DATA
5254 #define ELF_MACHINE_CODE EM_X86_64
5255 #define ELF_MAXPAGESIZE 0x200000
5256 #define ELF_MINPAGESIZE 0x1000
5257 #define ELF_COMMONPAGESIZE 0x1000
5259 #define elf_backend_can_gc_sections 1
5260 #define elf_backend_can_refcount 1
5261 #define elf_backend_want_got_plt 1
5262 #define elf_backend_plt_readonly 1
5263 #define elf_backend_want_plt_sym 0
5264 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5265 #define elf_backend_rela_normal 1
5266 #define elf_backend_plt_alignment 4
5268 #define elf_info_to_howto elf_x86_64_info_to_howto
5270 #define bfd_elf64_bfd_link_hash_table_create \
5271 elf_x86_64_link_hash_table_create
5272 #define bfd_elf64_bfd_link_hash_table_free \
5273 elf_x86_64_link_hash_table_free
5274 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5275 #define bfd_elf64_bfd_reloc_name_lookup \
5276 elf_x86_64_reloc_name_lookup
5278 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5279 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5280 #define elf_backend_check_relocs elf_x86_64_check_relocs
5281 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5282 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5283 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5284 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5285 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5286 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5287 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5288 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5290 #define elf_backend_write_core_note elf_x86_64_write_core_note
5292 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5293 #define elf_backend_relocate_section elf_x86_64_relocate_section
5294 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5295 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5296 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5297 #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
5298 #define elf_backend_object_p elf64_x86_64_elf_object_p
5299 #define bfd_elf64_mkobject elf_x86_64_mkobject
5301 #define elf_backend_section_from_shdr \
5302 elf_x86_64_section_from_shdr
5304 #define elf_backend_section_from_bfd_section \
5305 elf_x86_64_elf_section_from_bfd_section
5306 #define elf_backend_add_symbol_hook \
5307 elf_x86_64_add_symbol_hook
5308 #define elf_backend_symbol_processing \
5309 elf_x86_64_symbol_processing
5310 #define elf_backend_common_section_index \
5311 elf_x86_64_common_section_index
5312 #define elf_backend_common_section \
5313 elf_x86_64_common_section
5314 #define elf_backend_common_definition \
5315 elf_x86_64_common_definition
5316 #define elf_backend_merge_symbol \
5317 elf_x86_64_merge_symbol
5318 #define elf_backend_special_sections \
5319 elf_x86_64_special_sections
5320 #define elf_backend_additional_program_headers \
5321 elf_x86_64_additional_program_headers
5322 #define elf_backend_hash_symbol \
5323 elf_x86_64_hash_symbol
5325 #include "elf64-target.h"
5327 /* FreeBSD support. */
5329 #undef TARGET_LITTLE_SYM
5330 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
5331 #undef TARGET_LITTLE_NAME
5332 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5335 #define ELF_OSABI ELFOSABI_FREEBSD
5338 #define elf64_bed elf64_x86_64_fbsd_bed
5340 #include "elf64-target.h"
5342 /* Solaris 2 support. */
5344 #undef TARGET_LITTLE_SYM
5345 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
5346 #undef TARGET_LITTLE_NAME
5347 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5349 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5350 objects won't be recognized. */
5354 #define elf64_bed elf64_x86_64_sol2_bed
5356 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5358 #undef elf_backend_static_tls_alignment
5359 #define elf_backend_static_tls_alignment 16
5361 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5363 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5365 #undef elf_backend_want_plt_sym
5366 #define elf_backend_want_plt_sym 1
5368 #include "elf64-target.h"
5370 /* Native Client support. */
5373 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
5375 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5376 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
5380 #undef TARGET_LITTLE_SYM
5381 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
5382 #undef TARGET_LITTLE_NAME
5383 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5385 #define elf64_bed elf64_x86_64_nacl_bed
5387 #undef ELF_MAXPAGESIZE
5388 #undef ELF_MINPAGESIZE
5389 #undef ELF_COMMONPAGESIZE
5390 #define ELF_MAXPAGESIZE 0x10000
5391 #define ELF_MINPAGESIZE 0x10000
5392 #define ELF_COMMONPAGESIZE 0x10000
5394 /* Restore defaults. */
5396 #undef elf_backend_static_tls_alignment
5397 #undef elf_backend_want_plt_sym
5398 #define elf_backend_want_plt_sym 0
5400 /* NaCl uses substantially different PLT entries for the same effects. */
5402 #undef elf_backend_plt_alignment
5403 #define elf_backend_plt_alignment 5
5404 #define NACL_PLT_ENTRY_SIZE 64
5405 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5407 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
5409 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5410 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5411 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5412 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5413 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5415 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5416 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
5418 /* 32 bytes of nop to pad out to the standard size. */
5419 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5420 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5421 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5422 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5423 0x66, /* excess data32 prefix */
5427 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5429 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5430 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
5431 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5432 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5434 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5435 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5436 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5438 /* Lazy GOT entries point here (32-byte aligned). */
5439 0x68, /* pushq immediate */
5440 0, 0, 0, 0, /* replaced with index into relocation table. */
5441 0xe9, /* jmp relative */
5442 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5444 /* 22 bytes of nop to pad out to the standard size. */
5445 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5446 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5447 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5450 /* .eh_frame covering the .plt section. */
5452 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
5454 #if (PLT_CIE_LENGTH != 20 \
5455 || PLT_FDE_LENGTH != 36 \
5456 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5457 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5458 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5460 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5461 0, 0, 0, 0, /* CIE ID */
5462 1, /* CIE version */
5463 'z', 'R', 0, /* Augmentation string */
5464 1, /* Code alignment factor */
5465 0x78, /* Data alignment factor */
5466 16, /* Return address column */
5467 1, /* Augmentation size */
5468 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5469 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5470 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5471 DW_CFA_nop
, DW_CFA_nop
,
5473 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5474 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
5475 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5476 0, 0, 0, 0, /* .plt size goes here */
5477 0, /* Augmentation size */
5478 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
5479 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5480 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
5481 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5482 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5483 13, /* Block length */
5484 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
5485 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
5486 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5487 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
5488 DW_CFA_nop
, DW_CFA_nop
5491 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
5493 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
5494 elf_x86_64_nacl_plt_entry
, /* plt_entry */
5495 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5496 2, /* plt0_got1_offset */
5497 9, /* plt0_got2_offset */
5498 13, /* plt0_got2_insn_end */
5499 3, /* plt_got_offset */
5500 33, /* plt_reloc_offset */
5501 38, /* plt_plt_offset */
5502 7, /* plt_got_insn_size */
5503 42, /* plt_plt_insn_end */
5504 32, /* plt_lazy_offset */
5505 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
5506 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
5509 #undef elf_backend_arch_data
5510 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5512 #undef elf_backend_object_p
5513 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5514 #undef elf_backend_modify_segment_map
5515 #define elf_backend_modify_segment_map nacl_modify_segment_map
5516 #undef elf_backend_modify_program_headers
5517 #define elf_backend_modify_program_headers nacl_modify_program_headers
5518 #undef elf_backend_final_write_processing
5519 #define elf_backend_final_write_processing nacl_final_write_processing
5521 #include "elf64-target.h"
5523 /* Native Client x32 support. */
5526 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
5528 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5529 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
5533 #undef TARGET_LITTLE_SYM
5534 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
5535 #undef TARGET_LITTLE_NAME
5536 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5538 #define elf32_bed elf32_x86_64_nacl_bed
5540 #define bfd_elf32_bfd_link_hash_table_create \
5541 elf_x86_64_link_hash_table_create
5542 #define bfd_elf32_bfd_link_hash_table_free \
5543 elf_x86_64_link_hash_table_free
5544 #define bfd_elf32_bfd_reloc_type_lookup \
5545 elf_x86_64_reloc_type_lookup
5546 #define bfd_elf32_bfd_reloc_name_lookup \
5547 elf_x86_64_reloc_name_lookup
5548 #define bfd_elf32_mkobject \
5551 #undef elf_backend_object_p
5552 #define elf_backend_object_p \
5553 elf32_x86_64_nacl_elf_object_p
5555 #undef elf_backend_bfd_from_remote_memory
5556 #define elf_backend_bfd_from_remote_memory \
5557 _bfd_elf32_bfd_from_remote_memory
5559 #undef elf_backend_size_info
5560 #define elf_backend_size_info \
5561 _bfd_elf32_size_info
5563 #include "elf32-target.h"
5565 /* Restore defaults. */
5566 #undef elf_backend_object_p
5567 #define elf_backend_object_p elf64_x86_64_elf_object_p
5568 #undef elf_backend_bfd_from_remote_memory
5569 #undef elf_backend_size_info
5570 #undef elf_backend_modify_segment_map
5571 #undef elf_backend_modify_program_headers
5572 #undef elf_backend_final_write_processing
5574 /* Intel L1OM support. */
5577 elf64_l1om_elf_object_p (bfd
*abfd
)
5579 /* Set the right machine number for an L1OM elf64 file. */
5580 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
5584 #undef TARGET_LITTLE_SYM
5585 #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5586 #undef TARGET_LITTLE_NAME
5587 #define TARGET_LITTLE_NAME "elf64-l1om"
5589 #define ELF_ARCH bfd_arch_l1om
5591 #undef ELF_MACHINE_CODE
5592 #define ELF_MACHINE_CODE EM_L1OM
5597 #define elf64_bed elf64_l1om_bed
5599 #undef elf_backend_object_p
5600 #define elf_backend_object_p elf64_l1om_elf_object_p
5602 /* Restore defaults. */
5603 #undef ELF_MAXPAGESIZE
5604 #undef ELF_MINPAGESIZE
5605 #undef ELF_COMMONPAGESIZE
5606 #define ELF_MAXPAGESIZE 0x200000
5607 #define ELF_MINPAGESIZE 0x1000
5608 #define ELF_COMMONPAGESIZE 0x1000
5609 #undef elf_backend_plt_alignment
5610 #define elf_backend_plt_alignment 4
5611 #undef elf_backend_arch_data
5612 #define elf_backend_arch_data &elf_x86_64_arch_bed
5614 #include "elf64-target.h"
5616 /* FreeBSD L1OM support. */
5618 #undef TARGET_LITTLE_SYM
5619 #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5620 #undef TARGET_LITTLE_NAME
5621 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5624 #define ELF_OSABI ELFOSABI_FREEBSD
5627 #define elf64_bed elf64_l1om_fbsd_bed
5629 #include "elf64-target.h"
5631 /* Intel K1OM support. */
5634 elf64_k1om_elf_object_p (bfd
*abfd
)
5636 /* Set the right machine number for an K1OM elf64 file. */
5637 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
5641 #undef TARGET_LITTLE_SYM
5642 #define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
5643 #undef TARGET_LITTLE_NAME
5644 #define TARGET_LITTLE_NAME "elf64-k1om"
5646 #define ELF_ARCH bfd_arch_k1om
5648 #undef ELF_MACHINE_CODE
5649 #define ELF_MACHINE_CODE EM_K1OM
5654 #define elf64_bed elf64_k1om_bed
5656 #undef elf_backend_object_p
5657 #define elf_backend_object_p elf64_k1om_elf_object_p
5659 #undef elf_backend_static_tls_alignment
5661 #undef elf_backend_want_plt_sym
5662 #define elf_backend_want_plt_sym 0
5664 #include "elf64-target.h"
5666 /* FreeBSD K1OM support. */
5668 #undef TARGET_LITTLE_SYM
5669 #define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
5670 #undef TARGET_LITTLE_NAME
5671 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5674 #define ELF_OSABI ELFOSABI_FREEBSD
5677 #define elf64_bed elf64_k1om_fbsd_bed
5679 #include "elf64-target.h"
5681 /* 32bit x86-64 support. */
5683 #undef TARGET_LITTLE_SYM
5684 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5685 #undef TARGET_LITTLE_NAME
5686 #define TARGET_LITTLE_NAME "elf32-x86-64"
5690 #define ELF_ARCH bfd_arch_i386
5692 #undef ELF_MACHINE_CODE
5693 #define ELF_MACHINE_CODE EM_X86_64
5697 #undef elf_backend_object_p
5698 #define elf_backend_object_p \
5699 elf32_x86_64_elf_object_p
5701 #undef elf_backend_bfd_from_remote_memory
5702 #define elf_backend_bfd_from_remote_memory \
5703 _bfd_elf32_bfd_from_remote_memory
5705 #undef elf_backend_size_info
5706 #define elf_backend_size_info \
5707 _bfd_elf32_size_info
5709 #include "elf32-target.h"