1 /* X86-64 specific support for ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2010 Free Software Foundation, Inc.
4 Contributed by Jan Hubicka <jh@suse.cz>.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
28 #include "bfd_stdint.h"
32 #include "elf/x86-64.h"
34 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
35 #define MINUS_ONE (~ (bfd_vma) 0)
37 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
38 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
39 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
40 since they are the same. */
42 #define ABI_64_P(abfd) \
43 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
45 /* The relocation "howto" table. Order of fields:
46 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
47 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
48 static reloc_howto_type x86_64_elf_howto_table[] =
50 HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont,
51 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
53 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
54 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
56 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
57 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
59 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
60 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
62 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
63 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
65 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
68 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
71 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
74 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
77 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
78 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
80 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
81 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
83 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
84 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
86 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
88 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
90 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
92 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
93 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
94 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
97 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
100 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
103 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
104 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
106 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
107 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
109 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
110 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
112 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
113 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
115 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
116 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
118 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
121 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
123 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
124 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
125 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
126 FALSE, 0xffffffff, 0xffffffff, TRUE),
127 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
128 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
130 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
131 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
133 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
134 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
135 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
136 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
137 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
139 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
140 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
144 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
145 complain_overflow_bitfield, bfd_elf_generic_reloc,
146 "R_X86_64_GOTPC32_TLSDESC",
147 FALSE, 0xffffffff, 0xffffffff, TRUE),
148 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
149 complain_overflow_dont, bfd_elf_generic_reloc,
150 "R_X86_64_TLSDESC_CALL",
152 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
153 complain_overflow_bitfield, bfd_elf_generic_reloc,
155 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
156 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
160 /* We have a gap in the reloc numbers here.
161 R_X86_64_standard counts the number up to this point, and
162 R_X86_64_vt_offset is the value to subtract from a reloc type of
163 R_X86_64_GNU_VT* to form an index into this table. */
164 #define R_X86_64_standard (R_X86_64_IRELATIVE + 1)
165 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
167 /* GNU extension to record C++ vtable hierarchy. */
168 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
169 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
171 /* GNU extension to record C++ vtable member usage. */
172 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
173 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
177 #define IS_X86_64_PCREL_TYPE(TYPE) \
178 ( ((TYPE) == R_X86_64_PC8) \
179 || ((TYPE) == R_X86_64_PC16) \
180 || ((TYPE) == R_X86_64_PC32) \
181 || ((TYPE) == R_X86_64_PC64))
183 /* Map BFD relocs to the x86_64 elf relocs. */
186 bfd_reloc_code_real_type bfd_reloc_val;
187 unsigned char elf_reloc_val;
190 static const struct elf_reloc_map x86_64_reloc_map[] =
192 { BFD_RELOC_NONE, R_X86_64_NONE, },
193 { BFD_RELOC_64, R_X86_64_64, },
194 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
195 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
196 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
197 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
198 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
199 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
200 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
201 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
202 { BFD_RELOC_32, R_X86_64_32, },
203 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
204 { BFD_RELOC_16, R_X86_64_16, },
205 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
206 { BFD_RELOC_8, R_X86_64_8, },
207 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
208 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
209 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
210 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
211 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
212 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
213 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
214 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
215 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
216 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
217 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
218 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
219 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
220 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
221 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
222 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
223 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
224 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
225 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
226 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
227 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
228 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
229 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
232 static reloc_howto_type *
233 elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
237 if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
238 || r_type >= (unsigned int) R_X86_64_max)
240 if (r_type >= (unsigned int) R_X86_64_standard)
242 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
244 r_type = R_X86_64_NONE;
249 i = r_type - (unsigned int) R_X86_64_vt_offset;
250 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
251 return &x86_64_elf_howto_table[i];
254 /* Given a BFD reloc type, return a HOWTO structure. */
255 static reloc_howto_type *
256 elf_x86_64_reloc_type_lookup (bfd *abfd,
257 bfd_reloc_code_real_type code)
261 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
264 if (x86_64_reloc_map[i].bfd_reloc_val == code)
265 return elf_x86_64_rtype_to_howto (abfd,
266 x86_64_reloc_map[i].elf_reloc_val);
271 static reloc_howto_type *
272 elf_x86_64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
278 i < (sizeof (x86_64_elf_howto_table)
279 / sizeof (x86_64_elf_howto_table[0]));
281 if (x86_64_elf_howto_table[i].name != NULL
282 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
283 return &x86_64_elf_howto_table[i];
288 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
291 elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
292 Elf_Internal_Rela *dst)
296 r_type = ELF32_R_TYPE (dst->r_info);
297 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
298 BFD_ASSERT (r_type == cache_ptr->howto->type);
301 /* Support for core dump NOTE sections. */
303 elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
308 switch (note->descsz)
313 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
315 elf_tdata (abfd)->core_signal
316 = bfd_get_16 (abfd, note->descdata + 12);
319 elf_tdata (abfd)->core_lwpid
320 = bfd_get_32 (abfd, note->descdata + 32);
329 /* Make a ".reg/999" section. */
330 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
331 size, note->descpos + offset);
335 elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
337 switch (note->descsz)
342 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
343 elf_tdata (abfd)->core_pid
344 = bfd_get_32 (abfd, note->descdata + 24);
345 elf_tdata (abfd)->core_program
346 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
347 elf_tdata (abfd)->core_command
348 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
351 /* Note that for some reason, a spurious space is tacked
352 onto the end of the args in some (at least one anyway)
353 implementations, so strip it off if it exists. */
356 char *command = elf_tdata (abfd)->core_command;
357 int n = strlen (command);
359 if (0 < n && command[n - 1] == ' ')
360 command[n - 1] = '\0';
366 /* Functions for the x86-64 ELF linker. */
368 /* The name of the dynamic interpreter. This is put in the .interp
371 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
372 #define ELF32_DYNAMIC_INTERPRETER "/lib/ld32.so.1"
374 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
375 copying dynamic variables from a shared lib into an app's dynbss
376 section, and instead use a dynamic relocation to point into the
378 #define ELIMINATE_COPY_RELOCS 1
380 /* The size in bytes of an entry in the global offset table. */
382 #define GOT_ENTRY_SIZE 8
384 /* The size in bytes of an entry in the procedure linkage table. */
386 #define PLT_ENTRY_SIZE 16
388 /* The first entry in a procedure linkage table looks like this. See the
389 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
391 static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
393 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
394 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
395 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
398 /* Subsequent entries in a procedure linkage table look like this. */
400 static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
402 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
403 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
404 0x68, /* pushq immediate */
405 0, 0, 0, 0, /* replaced with index into relocation table. */
406 0xe9, /* jmp relative */
407 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
410 /* x86-64 ELF linker hash entry. */
412 struct elf_x86_64_link_hash_entry
414 struct elf_link_hash_entry elf;
416 /* Track dynamic relocs copied for this symbol. */
417 struct elf_dyn_relocs *dyn_relocs;
419 #define GOT_UNKNOWN 0
423 #define GOT_TLS_GDESC 4
424 #define GOT_TLS_GD_BOTH_P(type) \
425 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
426 #define GOT_TLS_GD_P(type) \
427 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
428 #define GOT_TLS_GDESC_P(type) \
429 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
430 #define GOT_TLS_GD_ANY_P(type) \
431 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
432 unsigned char tls_type;
434 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
435 starting at the end of the jump table. */
439 #define elf_x86_64_hash_entry(ent) \
440 ((struct elf_x86_64_link_hash_entry *)(ent))
442 struct elf_x86_64_obj_tdata
444 struct elf_obj_tdata root;
446 /* tls_type for each local got entry. */
447 char *local_got_tls_type;
449 /* GOTPLT entries for TLS descriptors. */
450 bfd_vma *local_tlsdesc_gotent;
453 #define elf_x86_64_tdata(abfd) \
454 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
456 #define elf_x86_64_local_got_tls_type(abfd) \
457 (elf_x86_64_tdata (abfd)->local_got_tls_type)
459 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
460 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
462 #define is_x86_64_elf(bfd) \
463 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
464 && elf_tdata (bfd) != NULL \
465 && elf_object_id (bfd) == X86_64_ELF_DATA)
468 elf_x86_64_mkobject (bfd *abfd)
470 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
474 /* x86-64 ELF linker hash table. */
476 struct elf_x86_64_link_hash_table
478 struct elf_link_hash_table elf;
480 /* Short-cuts to get to dynamic linker sections. */
486 bfd_signed_vma refcount;
490 /* The amount of space used by the jump slots in the GOT. */
491 bfd_vma sgotplt_jump_table_size;
493 /* Small local sym cache. */
494 struct sym_cache sym_cache;
496 bfd_vma (*r_info) (bfd_vma, bfd_vma);
497 bfd_vma (*r_sym) (bfd_vma);
498 unsigned int pointer_r_type;
499 const char *dynamic_interpreter;
500 int dynamic_interpreter_size;
502 /* _TLS_MODULE_BASE_ symbol. */
503 struct bfd_link_hash_entry *tls_module_base;
505 /* Used by local STT_GNU_IFUNC symbols. */
506 htab_t loc_hash_table;
507 void * loc_hash_memory;
509 /* The offset into splt of the PLT entry for the TLS descriptor
510 resolver. Special values are 0, if not necessary (or not found
511 to be necessary yet), and -1 if needed but not determined
514 /* The offset into sgot of the GOT entry used by the PLT entry
519 /* Get the x86-64 ELF linker hash table from a link_info structure. */
521 #define elf_x86_64_hash_table(p) \
522 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
523 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
525 #define elf_x86_64_compute_jump_table_size(htab) \
526 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
528 /* Create an entry in an x86-64 ELF linker hash table. */
530 static struct bfd_hash_entry *
531 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
532 struct bfd_hash_table *table,
535 /* Allocate the structure if it has not already been allocated by a
539 entry = (struct bfd_hash_entry *)
540 bfd_hash_allocate (table,
541 sizeof (struct elf_x86_64_link_hash_entry));
546 /* Call the allocation method of the superclass. */
547 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
550 struct elf_x86_64_link_hash_entry *eh;
552 eh = (struct elf_x86_64_link_hash_entry *) entry;
553 eh->dyn_relocs = NULL;
554 eh->tls_type = GOT_UNKNOWN;
555 eh->tlsdesc_got = (bfd_vma) -1;
561 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
562 for local symbol so that we can handle local STT_GNU_IFUNC symbols
563 as global symbol. We reuse indx and dynstr_index for local symbol
564 hash since they aren't used by global symbols in this backend. */
567 elf_x86_64_local_htab_hash (const void *ptr)
569 struct elf_link_hash_entry *h
570 = (struct elf_link_hash_entry *) ptr;
571 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
574 /* Compare local hash entries. */
577 elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
579 struct elf_link_hash_entry *h1
580 = (struct elf_link_hash_entry *) ptr1;
581 struct elf_link_hash_entry *h2
582 = (struct elf_link_hash_entry *) ptr2;
584 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
587 /* Find and/or create a hash entry for local symbol. */
589 static struct elf_link_hash_entry *
590 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
591 bfd *abfd, const Elf_Internal_Rela *rel,
594 struct elf_x86_64_link_hash_entry e, *ret;
595 asection *sec = abfd->sections;
596 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
597 htab->r_sym (rel->r_info));
600 e.elf.indx = sec->id;
601 e.elf.dynstr_index = htab->r_sym (rel->r_info);
602 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
603 create ? INSERT : NO_INSERT);
610 ret = (struct elf_x86_64_link_hash_entry *) *slot;
614 ret = (struct elf_x86_64_link_hash_entry *)
615 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
616 sizeof (struct elf_x86_64_link_hash_entry));
619 memset (ret, 0, sizeof (*ret));
620 ret->elf.indx = sec->id;
621 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
622 ret->elf.dynindx = -1;
628 /* Create an X86-64 ELF linker hash table. */
630 static struct bfd_link_hash_table *
631 elf_x86_64_link_hash_table_create (bfd *abfd)
633 struct elf_x86_64_link_hash_table *ret;
634 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
636 ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt);
640 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
641 elf_x86_64_link_hash_newfunc,
642 sizeof (struct elf_x86_64_link_hash_entry),
651 ret->sym_cache.abfd = NULL;
652 ret->tlsdesc_plt = 0;
653 ret->tlsdesc_got = 0;
654 ret->tls_ld_got.refcount = 0;
655 ret->sgotplt_jump_table_size = 0;
656 ret->tls_module_base = NULL;
660 ret->r_info = elf64_r_info;
661 ret->r_sym = elf64_r_sym;
662 ret->pointer_r_type = R_X86_64_64;
663 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
664 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
668 ret->r_info = elf32_r_info;
669 ret->r_sym = elf32_r_sym;
670 ret->pointer_r_type = R_X86_64_32;
671 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
672 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
675 ret->loc_hash_table = htab_try_create (1024,
676 elf_x86_64_local_htab_hash,
677 elf_x86_64_local_htab_eq,
679 ret->loc_hash_memory = objalloc_create ();
680 if (!ret->loc_hash_table || !ret->loc_hash_memory)
686 return &ret->elf.root;
689 /* Destroy an X86-64 ELF linker hash table. */
692 elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash)
694 struct elf_x86_64_link_hash_table *htab
695 = (struct elf_x86_64_link_hash_table *) hash;
697 if (htab->loc_hash_table)
698 htab_delete (htab->loc_hash_table);
699 if (htab->loc_hash_memory)
700 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
701 _bfd_generic_link_hash_table_free (hash);
704 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
705 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
709 elf_x86_64_create_dynamic_sections (bfd *dynobj,
710 struct bfd_link_info *info)
712 struct elf_x86_64_link_hash_table *htab;
714 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
717 htab = elf_x86_64_hash_table (info);
721 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
723 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
726 || (!info->shared && !htab->srelbss))
732 /* Copy the extra info we tack onto an elf_link_hash_entry. */
735 elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
736 struct elf_link_hash_entry *dir,
737 struct elf_link_hash_entry *ind)
739 struct elf_x86_64_link_hash_entry *edir, *eind;
741 edir = (struct elf_x86_64_link_hash_entry *) dir;
742 eind = (struct elf_x86_64_link_hash_entry *) ind;
744 if (eind->dyn_relocs != NULL)
746 if (edir->dyn_relocs != NULL)
748 struct elf_dyn_relocs **pp;
749 struct elf_dyn_relocs *p;
751 /* Add reloc counts against the indirect sym to the direct sym
752 list. Merge any entries against the same section. */
753 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
755 struct elf_dyn_relocs *q;
757 for (q = edir->dyn_relocs; q != NULL; q = q->next)
758 if (q->sec == p->sec)
760 q->pc_count += p->pc_count;
761 q->count += p->count;
768 *pp = edir->dyn_relocs;
771 edir->dyn_relocs = eind->dyn_relocs;
772 eind->dyn_relocs = NULL;
775 if (ind->root.type == bfd_link_hash_indirect
776 && dir->got.refcount <= 0)
778 edir->tls_type = eind->tls_type;
779 eind->tls_type = GOT_UNKNOWN;
782 if (ELIMINATE_COPY_RELOCS
783 && ind->root.type != bfd_link_hash_indirect
784 && dir->dynamic_adjusted)
786 /* If called to transfer flags for a weakdef during processing
787 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
788 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
789 dir->ref_dynamic |= ind->ref_dynamic;
790 dir->ref_regular |= ind->ref_regular;
791 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
792 dir->needs_plt |= ind->needs_plt;
793 dir->pointer_equality_needed |= ind->pointer_equality_needed;
796 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
800 elf64_x86_64_elf_object_p (bfd *abfd)
802 /* Set the right machine number for an x86-64 elf64 file. */
803 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
821 /* Return TRUE if the TLS access code sequence support transition
825 elf_x86_64_check_tls_transition (bfd *abfd,
826 struct bfd_link_info *info,
829 Elf_Internal_Shdr *symtab_hdr,
830 struct elf_link_hash_entry **sym_hashes,
832 const Elf_Internal_Rela *rel,
833 const Elf_Internal_Rela *relend)
836 unsigned long r_symndx;
837 struct elf_link_hash_entry *h;
839 struct elf_x86_64_link_hash_table *htab;
841 /* Get the section contents. */
842 if (contents == NULL)
844 if (elf_section_data (sec)->this_hdr.contents != NULL)
845 contents = elf_section_data (sec)->this_hdr.contents;
848 /* FIXME: How to better handle error condition? */
849 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
852 /* Cache the section contents for elf_link_input_bfd. */
853 elf_section_data (sec)->this_hdr.contents = contents;
857 htab = elf_x86_64_hash_table (info);
858 offset = rel->r_offset;
863 if ((rel + 1) >= relend)
866 if (r_type == R_X86_64_TLSGD)
868 /* Check transition from GD access model. Only
869 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
870 .word 0x6666; rex64; call __tls_get_addr
871 can transit to different access model. */
873 static x86_64_opcode32 leaq = { { 0x66, 0x48, 0x8d, 0x3d } },
874 call = { { 0x66, 0x66, 0x48, 0xe8 } };
876 || (offset + 12) > sec->size
877 || bfd_get_32 (abfd, contents + offset - 4) != leaq.i
878 || bfd_get_32 (abfd, contents + offset + 4) != call.i)
883 /* Check transition from LD access model. Only
884 leaq foo@tlsld(%rip), %rdi;
886 can transit to different access model. */
888 static x86_64_opcode32 ld = { { 0x48, 0x8d, 0x3d, 0xe8 } };
891 if (offset < 3 || (offset + 9) > sec->size)
894 op.i = bfd_get_32 (abfd, contents + offset - 3);
895 op.c[3] = bfd_get_8 (abfd, contents + offset + 4);
900 r_symndx = htab->r_sym (rel[1].r_info);
901 if (r_symndx < symtab_hdr->sh_info)
904 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
905 /* Use strncmp to check __tls_get_addr since __tls_get_addr
908 && h->root.root.string != NULL
909 && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
910 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)
911 && (strncmp (h->root.root.string,
912 "__tls_get_addr", 14) == 0));
914 case R_X86_64_GOTTPOFF:
915 /* Check transition from IE access model:
916 movq foo@gottpoff(%rip), %reg
917 addq foo@gottpoff(%rip), %reg
920 if (offset < 3 || (offset + 4) > sec->size)
923 val = bfd_get_8 (abfd, contents + offset - 3);
924 if (val != 0x48 && val != 0x4c)
927 val = bfd_get_8 (abfd, contents + offset - 2);
928 if (val != 0x8b && val != 0x03)
931 val = bfd_get_8 (abfd, contents + offset - 1);
932 return (val & 0xc7) == 5;
934 case R_X86_64_GOTPC32_TLSDESC:
935 /* Check transition from GDesc access model:
936 leaq x@tlsdesc(%rip), %rax
938 Make sure it's a leaq adding rip to a 32-bit offset
939 into any register, although it's probably almost always
942 if (offset < 3 || (offset + 4) > sec->size)
945 val = bfd_get_8 (abfd, contents + offset - 3);
946 if ((val & 0xfb) != 0x48)
949 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
952 val = bfd_get_8 (abfd, contents + offset - 1);
953 return (val & 0xc7) == 0x05;
955 case R_X86_64_TLSDESC_CALL:
956 /* Check transition from GDesc access model:
957 call *x@tlsdesc(%rax)
959 if (offset + 2 <= sec->size)
961 /* Make sure that it's a call *x@tlsdesc(%rax). */
962 static x86_64_opcode16 call = { { 0xff, 0x10 } };
963 return bfd_get_16 (abfd, contents + offset) == call.i;
973 /* Return TRUE if the TLS access transition is OK or no transition
974 will be performed. Update R_TYPE if there is a transition. */
977 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
978 asection *sec, bfd_byte *contents,
979 Elf_Internal_Shdr *symtab_hdr,
980 struct elf_link_hash_entry **sym_hashes,
981 unsigned int *r_type, int tls_type,
982 const Elf_Internal_Rela *rel,
983 const Elf_Internal_Rela *relend,
984 struct elf_link_hash_entry *h,
985 unsigned long r_symndx)
987 unsigned int from_type = *r_type;
988 unsigned int to_type = from_type;
989 bfd_boolean check = TRUE;
991 /* Skip TLS transition for functions. */
993 && (h->type == STT_FUNC
994 || h->type == STT_GNU_IFUNC))
1000 case R_X86_64_GOTPC32_TLSDESC:
1001 case R_X86_64_TLSDESC_CALL:
1002 case R_X86_64_GOTTPOFF:
1003 if (info->executable)
1006 to_type = R_X86_64_TPOFF32;
1008 to_type = R_X86_64_GOTTPOFF;
1011 /* When we are called from elf_x86_64_relocate_section,
1012 CONTENTS isn't NULL and there may be additional transitions
1013 based on TLS_TYPE. */
1014 if (contents != NULL)
1016 unsigned int new_to_type = to_type;
1018 if (info->executable
1021 && tls_type == GOT_TLS_IE)
1022 new_to_type = R_X86_64_TPOFF32;
1024 if (to_type == R_X86_64_TLSGD
1025 || to_type == R_X86_64_GOTPC32_TLSDESC
1026 || to_type == R_X86_64_TLSDESC_CALL)
1028 if (tls_type == GOT_TLS_IE)
1029 new_to_type = R_X86_64_GOTTPOFF;
1032 /* We checked the transition before when we were called from
1033 elf_x86_64_check_relocs. We only want to check the new
1034 transition which hasn't been checked before. */
1035 check = new_to_type != to_type && from_type == to_type;
1036 to_type = new_to_type;
1041 case R_X86_64_TLSLD:
1042 if (info->executable)
1043 to_type = R_X86_64_TPOFF32;
1050 /* Return TRUE if there is no transition. */
1051 if (from_type == to_type)
1054 /* Check if the transition can be performed. */
1056 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1057 symtab_hdr, sym_hashes,
1058 from_type, rel, relend))
1060 reloc_howto_type *from, *to;
1063 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1064 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1067 name = h->root.root.string;
1070 struct elf_x86_64_link_hash_table *htab;
1072 htab = elf_x86_64_hash_table (info);
1077 Elf_Internal_Sym *isym;
1079 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1081 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1085 (*_bfd_error_handler)
1086 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1087 "in section `%A' failed"),
1088 abfd, sec, from->name, to->name, name,
1089 (unsigned long) rel->r_offset);
1090 bfd_set_error (bfd_error_bad_value);
1098 /* Look through the relocs for a section during the first phase, and
1099 calculate needed space in the global offset table, procedure
1100 linkage table, and dynamic reloc sections. */
1103 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1105 const Elf_Internal_Rela *relocs)
1107 struct elf_x86_64_link_hash_table *htab;
1108 Elf_Internal_Shdr *symtab_hdr;
1109 struct elf_link_hash_entry **sym_hashes;
1110 const Elf_Internal_Rela *rel;
1111 const Elf_Internal_Rela *rel_end;
1114 if (info->relocatable)
1117 BFD_ASSERT (is_x86_64_elf (abfd));
1119 htab = elf_x86_64_hash_table (info);
1123 symtab_hdr = &elf_symtab_hdr (abfd);
1124 sym_hashes = elf_sym_hashes (abfd);
1128 rel_end = relocs + sec->reloc_count;
1129 for (rel = relocs; rel < rel_end; rel++)
1131 unsigned int r_type;
1132 unsigned long r_symndx;
1133 struct elf_link_hash_entry *h;
1134 Elf_Internal_Sym *isym;
1137 r_symndx = htab->r_sym (rel->r_info);
1138 r_type = ELF32_R_TYPE (rel->r_info);
1140 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1142 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1147 if (r_symndx < symtab_hdr->sh_info)
1149 /* A local symbol. */
1150 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1155 /* Check relocation against local STT_GNU_IFUNC symbol. */
1156 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1158 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1163 /* Fake a STT_GNU_IFUNC symbol. */
1164 h->type = STT_GNU_IFUNC;
1167 h->forced_local = 1;
1168 h->root.type = bfd_link_hash_defined;
1176 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1177 while (h->root.type == bfd_link_hash_indirect
1178 || h->root.type == bfd_link_hash_warning)
1179 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1182 /* Check invalid x32 relocations. */
1183 if (!ABI_64_P (abfd))
1190 case R_X86_64_DTPOFF64:
1191 case R_X86_64_TPOFF64:
1193 case R_X86_64_GOTOFF64:
1194 case R_X86_64_GOT64:
1195 case R_X86_64_GOTPCREL64:
1196 case R_X86_64_GOTPC64:
1197 case R_X86_64_GOTPLT64:
1198 case R_X86_64_PLTOFF64:
1201 name = h->root.root.string;
1203 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1205 (*_bfd_error_handler)
1206 (_("%B: relocation %s against symbol `%s' isn't "
1207 "supported in x32 mode"), abfd,
1208 x86_64_elf_howto_table[r_type].name, name);
1209 bfd_set_error (bfd_error_bad_value);
1217 /* Create the ifunc sections for static executables. If we
1218 never see an indirect function symbol nor we are building
1219 a static executable, those sections will be empty and
1220 won't appear in output. */
1231 case R_X86_64_PLT32:
1232 case R_X86_64_GOTPCREL:
1233 case R_X86_64_GOTPCREL64:
1234 if (!_bfd_elf_create_ifunc_sections (abfd, info))
1239 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1240 it here if it is defined in a non-shared object. */
1241 if (h->type == STT_GNU_IFUNC
1244 /* It is referenced by a non-shared object. */
1248 /* STT_GNU_IFUNC symbol must go through PLT. */
1249 h->plt.refcount += 1;
1251 /* STT_GNU_IFUNC needs dynamic sections. */
1252 if (htab->elf.dynobj == NULL)
1253 htab->elf.dynobj = abfd;
1258 if (h->root.root.string)
1259 name = h->root.root.string;
1261 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1263 (*_bfd_error_handler)
1264 (_("%B: relocation %s against STT_GNU_IFUNC "
1265 "symbol `%s' isn't handled by %s"), abfd,
1266 x86_64_elf_howto_table[r_type].name,
1267 name, __FUNCTION__);
1268 bfd_set_error (bfd_error_bad_value);
1272 if (ABI_64_P (abfd))
1276 h->pointer_equality_needed = 1;
1279 /* We must copy these reloc types into the output
1280 file. Create a reloc section in dynobj and
1281 make room for this reloc. */
1282 sreloc = _bfd_elf_create_ifunc_dyn_reloc
1283 (abfd, info, sec, sreloc,
1284 &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs);
1295 if (r_type != R_X86_64_PC32
1296 && r_type != R_X86_64_PC64)
1297 h->pointer_equality_needed = 1;
1300 case R_X86_64_PLT32:
1303 case R_X86_64_GOTPCREL:
1304 case R_X86_64_GOTPCREL64:
1305 h->got.refcount += 1;
1306 if (htab->elf.sgot == NULL
1307 && !_bfd_elf_create_got_section (htab->elf.dynobj,
1317 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1318 symtab_hdr, sym_hashes,
1319 &r_type, GOT_UNKNOWN,
1320 rel, rel_end, h, r_symndx))
1325 case R_X86_64_TLSLD:
1326 htab->tls_ld_got.refcount += 1;
1329 case R_X86_64_TPOFF32:
1330 if (!info->executable && ABI_64_P (abfd))
1333 name = h->root.root.string;
1335 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1337 (*_bfd_error_handler)
1338 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1340 x86_64_elf_howto_table[r_type].name, name);
1341 bfd_set_error (bfd_error_bad_value);
1346 case R_X86_64_GOTTPOFF:
1347 if (!info->executable)
1348 info->flags |= DF_STATIC_TLS;
1351 case R_X86_64_GOT32:
1352 case R_X86_64_GOTPCREL:
1353 case R_X86_64_TLSGD:
1354 case R_X86_64_GOT64:
1355 case R_X86_64_GOTPCREL64:
1356 case R_X86_64_GOTPLT64:
1357 case R_X86_64_GOTPC32_TLSDESC:
1358 case R_X86_64_TLSDESC_CALL:
1359 /* This symbol requires a global offset table entry. */
1361 int tls_type, old_tls_type;
1365 default: tls_type = GOT_NORMAL; break;
1366 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1367 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
1368 case R_X86_64_GOTPC32_TLSDESC:
1369 case R_X86_64_TLSDESC_CALL:
1370 tls_type = GOT_TLS_GDESC; break;
1375 if (r_type == R_X86_64_GOTPLT64)
1377 /* This relocation indicates that we also need
1378 a PLT entry, as this is a function. We don't need
1379 a PLT entry for local symbols. */
1381 h->plt.refcount += 1;
1383 h->got.refcount += 1;
1384 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
1388 bfd_signed_vma *local_got_refcounts;
1390 /* This is a global offset table entry for a local symbol. */
1391 local_got_refcounts = elf_local_got_refcounts (abfd);
1392 if (local_got_refcounts == NULL)
1396 size = symtab_hdr->sh_info;
1397 size *= sizeof (bfd_signed_vma)
1398 + sizeof (bfd_vma) + sizeof (char);
1399 local_got_refcounts = ((bfd_signed_vma *)
1400 bfd_zalloc (abfd, size));
1401 if (local_got_refcounts == NULL)
1403 elf_local_got_refcounts (abfd) = local_got_refcounts;
1404 elf_x86_64_local_tlsdesc_gotent (abfd)
1405 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1406 elf_x86_64_local_got_tls_type (abfd)
1407 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1409 local_got_refcounts[r_symndx] += 1;
1411 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
1414 /* If a TLS symbol is accessed using IE at least once,
1415 there is no point to use dynamic model for it. */
1416 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1417 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1418 || tls_type != GOT_TLS_IE))
1420 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
1421 tls_type = old_tls_type;
1422 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1423 && GOT_TLS_GD_ANY_P (tls_type))
1424 tls_type |= old_tls_type;
1428 name = h->root.root.string;
1430 name = bfd_elf_sym_name (abfd, symtab_hdr,
1432 (*_bfd_error_handler)
1433 (_("%B: '%s' accessed both as normal and thread local symbol"),
1439 if (old_tls_type != tls_type)
1442 elf_x86_64_hash_entry (h)->tls_type = tls_type;
1444 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
1449 case R_X86_64_GOTOFF64:
1450 case R_X86_64_GOTPC32:
1451 case R_X86_64_GOTPC64:
1453 if (htab->elf.sgot == NULL)
1455 if (htab->elf.dynobj == NULL)
1456 htab->elf.dynobj = abfd;
1457 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1463 case R_X86_64_PLT32:
1464 /* This symbol requires a procedure linkage table entry. We
1465 actually build the entry in adjust_dynamic_symbol,
1466 because this might be a case of linking PIC code which is
1467 never referenced by a dynamic object, in which case we
1468 don't need to generate a procedure linkage table entry
1471 /* If this is a local symbol, we resolve it directly without
1472 creating a procedure linkage table entry. */
1477 h->plt.refcount += 1;
1480 case R_X86_64_PLTOFF64:
1481 /* This tries to form the 'address' of a function relative
1482 to GOT. For global symbols we need a PLT entry. */
1486 h->plt.refcount += 1;
1491 if (!ABI_64_P (abfd))
1496 /* Let's help debug shared library creation. These relocs
1497 cannot be used in shared libs. Don't error out for
1498 sections we don't care about, such as debug sections or
1499 non-constant sections. */
1502 && (sec->flags & SEC_ALLOC) != 0
1503 && (sec->flags & SEC_READONLY) != 0)
1506 name = h->root.root.string;
1508 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1509 (*_bfd_error_handler)
1510 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1511 abfd, x86_64_elf_howto_table[r_type].name, name);
1512 bfd_set_error (bfd_error_bad_value);
1523 if (h != NULL && info->executable)
1525 /* If this reloc is in a read-only section, we might
1526 need a copy reloc. We can't check reliably at this
1527 stage whether the section is read-only, as input
1528 sections have not yet been mapped to output sections.
1529 Tentatively set the flag for now, and correct in
1530 adjust_dynamic_symbol. */
1533 /* We may need a .plt entry if the function this reloc
1534 refers to is in a shared lib. */
1535 h->plt.refcount += 1;
1536 if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64)
1537 h->pointer_equality_needed = 1;
1540 /* If we are creating a shared library, and this is a reloc
1541 against a global symbol, or a non PC relative reloc
1542 against a local symbol, then we need to copy the reloc
1543 into the shared library. However, if we are linking with
1544 -Bsymbolic, we do not need to copy a reloc against a
1545 global symbol which is defined in an object we are
1546 including in the link (i.e., DEF_REGULAR is set). At
1547 this point we have not seen all the input files, so it is
1548 possible that DEF_REGULAR is not set now but will be set
1549 later (it is never cleared). In case of a weak definition,
1550 DEF_REGULAR may be cleared later by a strong definition in
1551 a shared library. We account for that possibility below by
1552 storing information in the relocs_copied field of the hash
1553 table entry. A similar situation occurs when creating
1554 shared libraries and symbol visibility changes render the
1557 If on the other hand, we are creating an executable, we
1558 may need to keep relocations for symbols satisfied by a
1559 dynamic library if we manage to avoid copy relocs for the
1562 && (sec->flags & SEC_ALLOC) != 0
1563 && (! IS_X86_64_PCREL_TYPE (r_type)
1565 && (! SYMBOLIC_BIND (info, h)
1566 || h->root.type == bfd_link_hash_defweak
1567 || !h->def_regular))))
1568 || (ELIMINATE_COPY_RELOCS
1570 && (sec->flags & SEC_ALLOC) != 0
1572 && (h->root.type == bfd_link_hash_defweak
1573 || !h->def_regular)))
1575 struct elf_dyn_relocs *p;
1576 struct elf_dyn_relocs **head;
1578 /* We must copy these reloc types into the output file.
1579 Create a reloc section in dynobj and make room for
1583 if (htab->elf.dynobj == NULL)
1584 htab->elf.dynobj = abfd;
1586 sreloc = _bfd_elf_make_dynamic_reloc_section
1587 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
1588 abfd, /*rela?*/ TRUE);
1594 /* If this is a global symbol, we count the number of
1595 relocations we need for this symbol. */
1598 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
1602 /* Track dynamic relocs needed for local syms too.
1603 We really need local syms available to do this
1608 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1613 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1617 /* Beware of type punned pointers vs strict aliasing
1619 vpp = &(elf_section_data (s)->local_dynrel);
1620 head = (struct elf_dyn_relocs **)vpp;
1624 if (p == NULL || p->sec != sec)
1626 bfd_size_type amt = sizeof *p;
1628 p = ((struct elf_dyn_relocs *)
1629 bfd_alloc (htab->elf.dynobj, amt));
1640 if (IS_X86_64_PCREL_TYPE (r_type))
1645 /* This relocation describes the C++ object vtable hierarchy.
1646 Reconstruct it for later use during GC. */
1647 case R_X86_64_GNU_VTINHERIT:
1648 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1652 /* This relocation describes which C++ vtable entries are actually
1653 used. Record for later use during GC. */
1654 case R_X86_64_GNU_VTENTRY:
1655 BFD_ASSERT (h != NULL);
1657 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1669 /* Return the section that should be marked against GC for a given
1673 elf_x86_64_gc_mark_hook (asection *sec,
1674 struct bfd_link_info *info,
1675 Elf_Internal_Rela *rel,
1676 struct elf_link_hash_entry *h,
1677 Elf_Internal_Sym *sym)
1680 switch (ELF32_R_TYPE (rel->r_info))
1682 case R_X86_64_GNU_VTINHERIT:
1683 case R_X86_64_GNU_VTENTRY:
1687 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1690 /* Update the got entry reference counts for the section being removed. */
1693 elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
1695 const Elf_Internal_Rela *relocs)
1697 struct elf_x86_64_link_hash_table *htab;
1698 Elf_Internal_Shdr *symtab_hdr;
1699 struct elf_link_hash_entry **sym_hashes;
1700 bfd_signed_vma *local_got_refcounts;
1701 const Elf_Internal_Rela *rel, *relend;
1703 if (info->relocatable)
1706 htab = elf_x86_64_hash_table (info);
1710 elf_section_data (sec)->local_dynrel = NULL;
1712 symtab_hdr = &elf_symtab_hdr (abfd);
1713 sym_hashes = elf_sym_hashes (abfd);
1714 local_got_refcounts = elf_local_got_refcounts (abfd);
1716 htab = elf_x86_64_hash_table (info);
1717 relend = relocs + sec->reloc_count;
1718 for (rel = relocs; rel < relend; rel++)
1720 unsigned long r_symndx;
1721 unsigned int r_type;
1722 struct elf_link_hash_entry *h = NULL;
1724 r_symndx = htab->r_sym (rel->r_info);
1725 if (r_symndx >= symtab_hdr->sh_info)
1727 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1728 while (h->root.type == bfd_link_hash_indirect
1729 || h->root.type == bfd_link_hash_warning)
1730 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1734 /* A local symbol. */
1735 Elf_Internal_Sym *isym;
1737 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1740 /* Check relocation against local STT_GNU_IFUNC symbol. */
1742 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1744 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
1752 struct elf_x86_64_link_hash_entry *eh;
1753 struct elf_dyn_relocs **pp;
1754 struct elf_dyn_relocs *p;
1756 eh = (struct elf_x86_64_link_hash_entry *) h;
1758 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1761 /* Everything must go for SEC. */
1767 r_type = ELF32_R_TYPE (rel->r_info);
1768 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1769 symtab_hdr, sym_hashes,
1770 &r_type, GOT_UNKNOWN,
1771 rel, relend, h, r_symndx))
1776 case R_X86_64_TLSLD:
1777 if (htab->tls_ld_got.refcount > 0)
1778 htab->tls_ld_got.refcount -= 1;
1781 case R_X86_64_TLSGD:
1782 case R_X86_64_GOTPC32_TLSDESC:
1783 case R_X86_64_TLSDESC_CALL:
1784 case R_X86_64_GOTTPOFF:
1785 case R_X86_64_GOT32:
1786 case R_X86_64_GOTPCREL:
1787 case R_X86_64_GOT64:
1788 case R_X86_64_GOTPCREL64:
1789 case R_X86_64_GOTPLT64:
1792 if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0)
1793 h->plt.refcount -= 1;
1794 if (h->got.refcount > 0)
1795 h->got.refcount -= 1;
1796 if (h->type == STT_GNU_IFUNC)
1798 if (h->plt.refcount > 0)
1799 h->plt.refcount -= 1;
1802 else if (local_got_refcounts != NULL)
1804 if (local_got_refcounts[r_symndx] > 0)
1805 local_got_refcounts[r_symndx] -= 1;
1819 && (h == NULL || h->type != STT_GNU_IFUNC))
1823 case R_X86_64_PLT32:
1824 case R_X86_64_PLTOFF64:
1827 if (h->plt.refcount > 0)
1828 h->plt.refcount -= 1;
1840 /* Adjust a symbol defined by a dynamic object and referenced by a
1841 regular object. The current definition is in some section of the
1842 dynamic object, but we're not including those sections. We have to
1843 change the definition to something the rest of the link can
1847 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
1848 struct elf_link_hash_entry *h)
1850 struct elf_x86_64_link_hash_table *htab;
1853 /* STT_GNU_IFUNC symbol must go through PLT. */
1854 if (h->type == STT_GNU_IFUNC)
1856 if (h->plt.refcount <= 0)
1858 h->plt.offset = (bfd_vma) -1;
1864 /* If this is a function, put it in the procedure linkage table. We
1865 will fill in the contents of the procedure linkage table later,
1866 when we know the address of the .got section. */
1867 if (h->type == STT_FUNC
1870 if (h->plt.refcount <= 0
1871 || SYMBOL_CALLS_LOCAL (info, h)
1872 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1873 && h->root.type == bfd_link_hash_undefweak))
1875 /* This case can occur if we saw a PLT32 reloc in an input
1876 file, but the symbol was never referred to by a dynamic
1877 object, or if all references were garbage collected. In
1878 such a case, we don't actually need to build a procedure
1879 linkage table, and we can just do a PC32 reloc instead. */
1880 h->plt.offset = (bfd_vma) -1;
1887 /* It's possible that we incorrectly decided a .plt reloc was
1888 needed for an R_X86_64_PC32 reloc to a non-function sym in
1889 check_relocs. We can't decide accurately between function and
1890 non-function syms in check-relocs; Objects loaded later in
1891 the link may change h->type. So fix it now. */
1892 h->plt.offset = (bfd_vma) -1;
1894 /* If this is a weak symbol, and there is a real definition, the
1895 processor independent code will have arranged for us to see the
1896 real definition first, and we can just use the same value. */
1897 if (h->u.weakdef != NULL)
1899 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1900 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1901 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1902 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1903 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1904 h->non_got_ref = h->u.weakdef->non_got_ref;
1908 /* This is a reference to a symbol defined by a dynamic object which
1909 is not a function. */
1911 /* If we are creating a shared library, we must presume that the
1912 only references to the symbol are via the global offset table.
1913 For such cases we need not do anything here; the relocations will
1914 be handled correctly by relocate_section. */
1918 /* If there are no references to this symbol that do not use the
1919 GOT, we don't need to generate a copy reloc. */
1920 if (!h->non_got_ref)
1923 /* If -z nocopyreloc was given, we won't generate them either. */
1924 if (info->nocopyreloc)
1930 if (ELIMINATE_COPY_RELOCS)
1932 struct elf_x86_64_link_hash_entry * eh;
1933 struct elf_dyn_relocs *p;
1935 eh = (struct elf_x86_64_link_hash_entry *) h;
1936 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1938 s = p->sec->output_section;
1939 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1943 /* If we didn't find any dynamic relocs in read-only sections, then
1944 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1954 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1955 h->root.root.string);
1959 /* We must allocate the symbol in our .dynbss section, which will
1960 become part of the .bss section of the executable. There will be
1961 an entry for this symbol in the .dynsym section. The dynamic
1962 object will contain position independent code, so all references
1963 from the dynamic object to this symbol will go through the global
1964 offset table. The dynamic linker will use the .dynsym entry to
1965 determine the address it must put in the global offset table, so
1966 both the dynamic object and the regular object will refer to the
1967 same memory location for the variable. */
1969 htab = elf_x86_64_hash_table (info);
1973 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
1974 to copy the initial value out of the dynamic object and into the
1975 runtime process image. */
1976 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1978 const struct elf_backend_data *bed;
1979 bed = get_elf_backend_data (info->output_bfd);
1980 htab->srelbss->size += bed->s->sizeof_rela;
1986 return _bfd_elf_adjust_dynamic_copy (h, s);
1989 /* Allocate space in .plt, .got and associated reloc sections for
1993 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1995 struct bfd_link_info *info;
1996 struct elf_x86_64_link_hash_table *htab;
1997 struct elf_x86_64_link_hash_entry *eh;
1998 struct elf_dyn_relocs *p;
1999 const struct elf_backend_data *bed;
2001 if (h->root.type == bfd_link_hash_indirect)
2004 if (h->root.type == bfd_link_hash_warning)
2005 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2006 eh = (struct elf_x86_64_link_hash_entry *) h;
2008 info = (struct bfd_link_info *) inf;
2009 htab = elf_x86_64_hash_table (info);
2012 bed = get_elf_backend_data (info->output_bfd);
2014 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2015 here if it is defined and referenced in a non-shared object. */
2016 if (h->type == STT_GNU_IFUNC
2018 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2022 else if (htab->elf.dynamic_sections_created
2023 && h->plt.refcount > 0)
2025 /* Make sure this symbol is output as a dynamic symbol.
2026 Undefined weak syms won't yet be marked as dynamic. */
2027 if (h->dynindx == -1
2028 && !h->forced_local)
2030 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2035 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2037 asection *s = htab->elf.splt;
2039 /* If this is the first .plt entry, make room for the special
2042 s->size += PLT_ENTRY_SIZE;
2044 h->plt.offset = s->size;
2046 /* If this symbol is not defined in a regular file, and we are
2047 not generating a shared library, then set the symbol to this
2048 location in the .plt. This is required to make function
2049 pointers compare as equal between the normal executable and
2050 the shared library. */
2054 h->root.u.def.section = s;
2055 h->root.u.def.value = h->plt.offset;
2058 /* Make room for this entry. */
2059 s->size += PLT_ENTRY_SIZE;
2061 /* We also need to make an entry in the .got.plt section, which
2062 will be placed in the .got section by the linker script. */
2063 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
2065 /* We also need to make an entry in the .rela.plt section. */
2066 htab->elf.srelplt->size += bed->s->sizeof_rela;
2067 htab->elf.srelplt->reloc_count++;
2071 h->plt.offset = (bfd_vma) -1;
2077 h->plt.offset = (bfd_vma) -1;
2081 eh->tlsdesc_got = (bfd_vma) -1;
2083 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2084 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2085 if (h->got.refcount > 0
2088 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
2090 h->got.offset = (bfd_vma) -1;
2092 else if (h->got.refcount > 0)
2096 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
2098 /* Make sure this symbol is output as a dynamic symbol.
2099 Undefined weak syms won't yet be marked as dynamic. */
2100 if (h->dynindx == -1
2101 && !h->forced_local)
2103 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2107 if (GOT_TLS_GDESC_P (tls_type))
2109 eh->tlsdesc_got = htab->elf.sgotplt->size
2110 - elf_x86_64_compute_jump_table_size (htab);
2111 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2112 h->got.offset = (bfd_vma) -2;
2114 if (! GOT_TLS_GDESC_P (tls_type)
2115 || GOT_TLS_GD_P (tls_type))
2118 h->got.offset = s->size;
2119 s->size += GOT_ENTRY_SIZE;
2120 if (GOT_TLS_GD_P (tls_type))
2121 s->size += GOT_ENTRY_SIZE;
2123 dyn = htab->elf.dynamic_sections_created;
2124 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2126 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2127 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2128 || tls_type == GOT_TLS_IE)
2129 htab->elf.srelgot->size += bed->s->sizeof_rela;
2130 else if (GOT_TLS_GD_P (tls_type))
2131 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
2132 else if (! GOT_TLS_GDESC_P (tls_type)
2133 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2134 || h->root.type != bfd_link_hash_undefweak)
2136 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2137 htab->elf.srelgot->size += bed->s->sizeof_rela;
2138 if (GOT_TLS_GDESC_P (tls_type))
2140 htab->elf.srelplt->size += bed->s->sizeof_rela;
2141 htab->tlsdesc_plt = (bfd_vma) -1;
2145 h->got.offset = (bfd_vma) -1;
2147 if (eh->dyn_relocs == NULL)
2150 /* In the shared -Bsymbolic case, discard space allocated for
2151 dynamic pc-relative relocs against symbols which turn out to be
2152 defined in regular objects. For the normal shared case, discard
2153 space for pc-relative relocs that have become local due to symbol
2154 visibility changes. */
2158 /* Relocs that use pc_count are those that appear on a call
2159 insn, or certain REL relocs that can generated via assembly.
2160 We want calls to protected symbols to resolve directly to the
2161 function rather than going via the plt. If people want
2162 function pointer comparisons to work as expected then they
2163 should avoid writing weird assembly. */
2164 if (SYMBOL_CALLS_LOCAL (info, h))
2166 struct elf_dyn_relocs **pp;
2168 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2170 p->count -= p->pc_count;
2179 /* Also discard relocs on undefined weak syms with non-default
2181 if (eh->dyn_relocs != NULL
2182 && h->root.type == bfd_link_hash_undefweak)
2184 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2185 eh->dyn_relocs = NULL;
2187 /* Make sure undefined weak symbols are output as a dynamic
2189 else if (h->dynindx == -1
2190 && ! h->forced_local
2191 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2196 else if (ELIMINATE_COPY_RELOCS)
2198 /* For the non-shared case, discard space for relocs against
2199 symbols which turn out to need copy relocs or are not
2205 || (htab->elf.dynamic_sections_created
2206 && (h->root.type == bfd_link_hash_undefweak
2207 || h->root.type == bfd_link_hash_undefined))))
2209 /* Make sure this symbol is output as a dynamic symbol.
2210 Undefined weak syms won't yet be marked as dynamic. */
2211 if (h->dynindx == -1
2212 && ! h->forced_local
2213 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2216 /* If that succeeded, we know we'll be keeping all the
2218 if (h->dynindx != -1)
2222 eh->dyn_relocs = NULL;
2227 /* Finally, allocate space. */
2228 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2232 sreloc = elf_section_data (p->sec)->sreloc;
2234 BFD_ASSERT (sreloc != NULL);
2236 sreloc->size += p->count * bed->s->sizeof_rela;
2242 /* Allocate space in .plt, .got and associated reloc sections for
2243 local dynamic relocs. */
2246 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
2248 struct elf_link_hash_entry *h
2249 = (struct elf_link_hash_entry *) *slot;
2251 if (h->type != STT_GNU_IFUNC
2255 || h->root.type != bfd_link_hash_defined)
2258 return elf_x86_64_allocate_dynrelocs (h, inf);
2261 /* Find any dynamic relocs that apply to read-only sections. */
2264 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2267 struct elf_x86_64_link_hash_entry *eh;
2268 struct elf_dyn_relocs *p;
2270 if (h->root.type == bfd_link_hash_warning)
2271 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2273 eh = (struct elf_x86_64_link_hash_entry *) h;
2274 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2276 asection *s = p->sec->output_section;
2278 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2280 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2282 info->flags |= DF_TEXTREL;
2284 /* Not an error, just cut short the traversal. */
2291 /* Set the sizes of the dynamic sections. */
2294 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2295 struct bfd_link_info *info)
2297 struct elf_x86_64_link_hash_table *htab;
2302 const struct elf_backend_data *bed;
2304 htab = elf_x86_64_hash_table (info);
2307 bed = get_elf_backend_data (output_bfd);
2309 dynobj = htab->elf.dynobj;
2313 if (htab->elf.dynamic_sections_created)
2315 /* Set the contents of the .interp section to the interpreter. */
2316 if (info->executable)
2318 s = bfd_get_section_by_name (dynobj, ".interp");
2321 s->size = htab->dynamic_interpreter_size;
2322 s->contents = (unsigned char *) htab->dynamic_interpreter;
2326 /* Set up .got offsets for local syms, and space for local dynamic
2328 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2330 bfd_signed_vma *local_got;
2331 bfd_signed_vma *end_local_got;
2332 char *local_tls_type;
2333 bfd_vma *local_tlsdesc_gotent;
2334 bfd_size_type locsymcount;
2335 Elf_Internal_Shdr *symtab_hdr;
2338 if (! is_x86_64_elf (ibfd))
2341 for (s = ibfd->sections; s != NULL; s = s->next)
2343 struct elf_dyn_relocs *p;
2345 for (p = (struct elf_dyn_relocs *)
2346 (elf_section_data (s)->local_dynrel);
2350 if (!bfd_is_abs_section (p->sec)
2351 && bfd_is_abs_section (p->sec->output_section))
2353 /* Input section has been discarded, either because
2354 it is a copy of a linkonce section or due to
2355 linker script /DISCARD/, so we'll be discarding
2358 else if (p->count != 0)
2360 srel = elf_section_data (p->sec)->sreloc;
2361 srel->size += p->count * bed->s->sizeof_rela;
2362 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2363 info->flags |= DF_TEXTREL;
2368 local_got = elf_local_got_refcounts (ibfd);
2372 symtab_hdr = &elf_symtab_hdr (ibfd);
2373 locsymcount = symtab_hdr->sh_info;
2374 end_local_got = local_got + locsymcount;
2375 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
2376 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
2378 srel = htab->elf.srelgot;
2379 for (; local_got < end_local_got;
2380 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2382 *local_tlsdesc_gotent = (bfd_vma) -1;
2385 if (GOT_TLS_GDESC_P (*local_tls_type))
2387 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2388 - elf_x86_64_compute_jump_table_size (htab);
2389 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2390 *local_got = (bfd_vma) -2;
2392 if (! GOT_TLS_GDESC_P (*local_tls_type)
2393 || GOT_TLS_GD_P (*local_tls_type))
2395 *local_got = s->size;
2396 s->size += GOT_ENTRY_SIZE;
2397 if (GOT_TLS_GD_P (*local_tls_type))
2398 s->size += GOT_ENTRY_SIZE;
2401 || GOT_TLS_GD_ANY_P (*local_tls_type)
2402 || *local_tls_type == GOT_TLS_IE)
2404 if (GOT_TLS_GDESC_P (*local_tls_type))
2406 htab->elf.srelplt->size
2407 += bed->s->sizeof_rela;
2408 htab->tlsdesc_plt = (bfd_vma) -1;
2410 if (! GOT_TLS_GDESC_P (*local_tls_type)
2411 || GOT_TLS_GD_P (*local_tls_type))
2412 srel->size += bed->s->sizeof_rela;
2416 *local_got = (bfd_vma) -1;
2420 if (htab->tls_ld_got.refcount > 0)
2422 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2424 htab->tls_ld_got.offset = htab->elf.sgot->size;
2425 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2426 htab->elf.srelgot->size += bed->s->sizeof_rela;
2429 htab->tls_ld_got.offset = -1;
2431 /* Allocate global sym .plt and .got entries, and space for global
2432 sym dynamic relocs. */
2433 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
2436 /* Allocate .plt and .got entries, and space for local symbols. */
2437 htab_traverse (htab->loc_hash_table,
2438 elf_x86_64_allocate_local_dynrelocs,
2441 /* For every jump slot reserved in the sgotplt, reloc_count is
2442 incremented. However, when we reserve space for TLS descriptors,
2443 it's not incremented, so in order to compute the space reserved
2444 for them, it suffices to multiply the reloc count by the jump
2446 if (htab->elf.srelplt)
2447 htab->sgotplt_jump_table_size
2448 = elf_x86_64_compute_jump_table_size (htab);
2450 if (htab->tlsdesc_plt)
2452 /* If we're not using lazy TLS relocations, don't generate the
2453 PLT and GOT entries they require. */
2454 if ((info->flags & DF_BIND_NOW))
2455 htab->tlsdesc_plt = 0;
2458 htab->tlsdesc_got = htab->elf.sgot->size;
2459 htab->elf.sgot->size += GOT_ENTRY_SIZE;
2460 /* Reserve room for the initial entry.
2461 FIXME: we could probably do away with it in this case. */
2462 if (htab->elf.splt->size == 0)
2463 htab->elf.splt->size += PLT_ENTRY_SIZE;
2464 htab->tlsdesc_plt = htab->elf.splt->size;
2465 htab->elf.splt->size += PLT_ENTRY_SIZE;
2469 if (htab->elf.sgotplt)
2471 struct elf_link_hash_entry *got;
2472 got = elf_link_hash_lookup (elf_hash_table (info),
2473 "_GLOBAL_OFFSET_TABLE_",
2474 FALSE, FALSE, FALSE);
2476 /* Don't allocate .got.plt section if there are no GOT nor PLT
2477 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2479 || !got->ref_regular_nonweak)
2480 && (htab->elf.sgotplt->size
2481 == get_elf_backend_data (output_bfd)->got_header_size)
2482 && (htab->elf.splt == NULL
2483 || htab->elf.splt->size == 0)
2484 && (htab->elf.sgot == NULL
2485 || htab->elf.sgot->size == 0)
2486 && (htab->elf.iplt == NULL
2487 || htab->elf.iplt->size == 0)
2488 && (htab->elf.igotplt == NULL
2489 || htab->elf.igotplt->size == 0))
2490 htab->elf.sgotplt->size = 0;
2493 /* We now have determined the sizes of the various dynamic sections.
2494 Allocate memory for them. */
2496 for (s = dynobj->sections; s != NULL; s = s->next)
2498 if ((s->flags & SEC_LINKER_CREATED) == 0)
2501 if (s == htab->elf.splt
2502 || s == htab->elf.sgot
2503 || s == htab->elf.sgotplt
2504 || s == htab->elf.iplt
2505 || s == htab->elf.igotplt
2506 || s == htab->sdynbss)
2508 /* Strip this section if we don't need it; see the
2511 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2513 if (s->size != 0 && s != htab->elf.srelplt)
2516 /* We use the reloc_count field as a counter if we need
2517 to copy relocs into the output file. */
2518 if (s != htab->elf.srelplt)
2523 /* It's not one of our sections, so don't allocate space. */
2529 /* If we don't need this section, strip it from the
2530 output file. This is mostly to handle .rela.bss and
2531 .rela.plt. We must create both sections in
2532 create_dynamic_sections, because they must be created
2533 before the linker maps input sections to output
2534 sections. The linker does that before
2535 adjust_dynamic_symbol is called, and it is that
2536 function which decides whether anything needs to go
2537 into these sections. */
2539 s->flags |= SEC_EXCLUDE;
2543 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2546 /* Allocate memory for the section contents. We use bfd_zalloc
2547 here in case unused entries are not reclaimed before the
2548 section's contents are written out. This should not happen,
2549 but this way if it does, we get a R_X86_64_NONE reloc instead
2551 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2552 if (s->contents == NULL)
2556 if (htab->elf.dynamic_sections_created)
2558 /* Add some entries to the .dynamic section. We fill in the
2559 values later, in elf_x86_64_finish_dynamic_sections, but we
2560 must add the entries now so that we get the correct size for
2561 the .dynamic section. The DT_DEBUG entry is filled in by the
2562 dynamic linker and used by the debugger. */
2563 #define add_dynamic_entry(TAG, VAL) \
2564 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2566 if (info->executable)
2568 if (!add_dynamic_entry (DT_DEBUG, 0))
2572 if (htab->elf.splt->size != 0)
2574 if (!add_dynamic_entry (DT_PLTGOT, 0)
2575 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2576 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2577 || !add_dynamic_entry (DT_JMPREL, 0))
2580 if (htab->tlsdesc_plt
2581 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
2582 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
2588 if (!add_dynamic_entry (DT_RELA, 0)
2589 || !add_dynamic_entry (DT_RELASZ, 0)
2590 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
2593 /* If any dynamic relocs apply to a read-only section,
2594 then we need a DT_TEXTREL entry. */
2595 if ((info->flags & DF_TEXTREL) == 0)
2596 elf_link_hash_traverse (&htab->elf,
2597 elf_x86_64_readonly_dynrelocs,
2600 if ((info->flags & DF_TEXTREL) != 0)
2602 if (!add_dynamic_entry (DT_TEXTREL, 0))
2607 #undef add_dynamic_entry
2613 elf_x86_64_always_size_sections (bfd *output_bfd,
2614 struct bfd_link_info *info)
2616 asection *tls_sec = elf_hash_table (info)->tls_sec;
2620 struct elf_link_hash_entry *tlsbase;
2622 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2623 "_TLS_MODULE_BASE_",
2624 FALSE, FALSE, FALSE);
2626 if (tlsbase && tlsbase->type == STT_TLS)
2628 struct elf_x86_64_link_hash_table *htab;
2629 struct bfd_link_hash_entry *bh = NULL;
2630 const struct elf_backend_data *bed
2631 = get_elf_backend_data (output_bfd);
2633 htab = elf_x86_64_hash_table (info);
2637 if (!(_bfd_generic_link_add_one_symbol
2638 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2639 tls_sec, 0, NULL, FALSE,
2640 bed->collect, &bh)))
2643 htab->tls_module_base = bh;
2645 tlsbase = (struct elf_link_hash_entry *)bh;
2646 tlsbase->def_regular = 1;
2647 tlsbase->other = STV_HIDDEN;
2648 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2655 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2656 executables. Rather than setting it to the beginning of the TLS
2657 section, we have to set it to the end. This function may be called
2658 multiple times, it is idempotent. */
2661 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
2663 struct elf_x86_64_link_hash_table *htab;
2664 struct bfd_link_hash_entry *base;
2666 if (!info->executable)
2669 htab = elf_x86_64_hash_table (info);
2673 base = htab->tls_module_base;
2677 base->u.def.value = htab->elf.tls_size;
2680 /* Return the base VMA address which should be subtracted from real addresses
2681 when resolving @dtpoff relocation.
2682 This is PT_TLS segment p_vaddr. */
2685 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
2687 /* If tls_sec is NULL, we should have signalled an error already. */
2688 if (elf_hash_table (info)->tls_sec == NULL)
2690 return elf_hash_table (info)->tls_sec->vma;
2693 /* Return the relocation value for @tpoff relocation
2694 if STT_TLS virtual address is ADDRESS. */
2697 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
2699 struct elf_link_hash_table *htab = elf_hash_table (info);
2700 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2701 bfd_vma static_tls_size;
2703 /* If tls_segment is NULL, we should have signalled an error already. */
2704 if (htab->tls_sec == NULL)
2707 /* Consider special static TLS alignment requirements. */
2708 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2709 return address - static_tls_size - htab->tls_sec->vma;
2712 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
2716 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
2718 /* Opcode Instruction
2721 0x0f 0x8x conditional jump */
2723 && (contents [offset - 1] == 0xe8
2724 || contents [offset - 1] == 0xe9))
2726 && contents [offset - 2] == 0x0f
2727 && (contents [offset - 1] & 0xf0) == 0x80));
2730 /* Relocate an x86_64 ELF section. */
2733 elf_x86_64_relocate_section (bfd *output_bfd,
2734 struct bfd_link_info *info,
2736 asection *input_section,
2738 Elf_Internal_Rela *relocs,
2739 Elf_Internal_Sym *local_syms,
2740 asection **local_sections)
2742 struct elf_x86_64_link_hash_table *htab;
2743 Elf_Internal_Shdr *symtab_hdr;
2744 struct elf_link_hash_entry **sym_hashes;
2745 bfd_vma *local_got_offsets;
2746 bfd_vma *local_tlsdesc_gotents;
2747 Elf_Internal_Rela *rel;
2748 Elf_Internal_Rela *relend;
2750 BFD_ASSERT (is_x86_64_elf (input_bfd));
2752 htab = elf_x86_64_hash_table (info);
2755 symtab_hdr = &elf_symtab_hdr (input_bfd);
2756 sym_hashes = elf_sym_hashes (input_bfd);
2757 local_got_offsets = elf_local_got_offsets (input_bfd);
2758 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
2760 elf_x86_64_set_tls_module_base (info);
2763 relend = relocs + input_section->reloc_count;
2764 for (; rel < relend; rel++)
2766 unsigned int r_type;
2767 reloc_howto_type *howto;
2768 unsigned long r_symndx;
2769 struct elf_link_hash_entry *h;
2770 Elf_Internal_Sym *sym;
2772 bfd_vma off, offplt;
2774 bfd_boolean unresolved_reloc;
2775 bfd_reloc_status_type r;
2779 r_type = ELF32_R_TYPE (rel->r_info);
2780 if (r_type == (int) R_X86_64_GNU_VTINHERIT
2781 || r_type == (int) R_X86_64_GNU_VTENTRY)
2784 if (r_type >= R_X86_64_max)
2786 bfd_set_error (bfd_error_bad_value);
2790 howto = x86_64_elf_howto_table + r_type;
2791 r_symndx = htab->r_sym (rel->r_info);
2795 unresolved_reloc = FALSE;
2796 if (r_symndx < symtab_hdr->sh_info)
2798 sym = local_syms + r_symndx;
2799 sec = local_sections[r_symndx];
2801 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
2804 /* Relocate against local STT_GNU_IFUNC symbol. */
2805 if (!info->relocatable
2806 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2808 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
2813 /* Set STT_GNU_IFUNC symbol value. */
2814 h->root.u.def.value = sym->st_value;
2815 h->root.u.def.section = sec;
2820 bfd_boolean warned ATTRIBUTE_UNUSED;
2822 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2823 r_symndx, symtab_hdr, sym_hashes,
2825 unresolved_reloc, warned);
2828 if (sec != NULL && elf_discarded_section (sec))
2829 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2830 rel, relend, howto, contents);
2832 if (info->relocatable)
2835 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2836 it here if it is defined in a non-shared object. */
2838 && h->type == STT_GNU_IFUNC
2845 if ((input_section->flags & SEC_ALLOC) == 0
2846 || h->plt.offset == (bfd_vma) -1)
2849 /* STT_GNU_IFUNC symbol must go through PLT. */
2850 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
2851 relocation = (plt->output_section->vma
2852 + plt->output_offset + h->plt.offset);
2857 if (h->root.root.string)
2858 name = h->root.root.string;
2860 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2862 (*_bfd_error_handler)
2863 (_("%B: relocation %s against STT_GNU_IFUNC "
2864 "symbol `%s' isn't handled by %s"), input_bfd,
2865 x86_64_elf_howto_table[r_type].name,
2866 name, __FUNCTION__);
2867 bfd_set_error (bfd_error_bad_value);
2876 if (ABI_64_P (output_bfd))
2879 if (rel->r_addend != 0)
2881 if (h->root.root.string)
2882 name = h->root.root.string;
2884 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
2886 (*_bfd_error_handler)
2887 (_("%B: relocation %s against STT_GNU_IFUNC "
2888 "symbol `%s' has non-zero addend: %d"),
2889 input_bfd, x86_64_elf_howto_table[r_type].name,
2890 name, rel->r_addend);
2891 bfd_set_error (bfd_error_bad_value);
2895 /* Generate dynamic relcoation only when there is a
2896 non-GOF reference in a shared object. */
2897 if (info->shared && h->non_got_ref)
2899 Elf_Internal_Rela outrel;
2902 /* Need a dynamic relocation to get the real function
2904 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2908 if (outrel.r_offset == (bfd_vma) -1
2909 || outrel.r_offset == (bfd_vma) -2)
2912 outrel.r_offset += (input_section->output_section->vma
2913 + input_section->output_offset);
2915 if (h->dynindx == -1
2917 || info->executable)
2919 /* This symbol is resolved locally. */
2920 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
2921 outrel.r_addend = (h->root.u.def.value
2922 + h->root.u.def.section->output_section->vma
2923 + h->root.u.def.section->output_offset);
2927 outrel.r_info = htab->r_info (h->dynindx, r_type);
2928 outrel.r_addend = 0;
2931 sreloc = htab->elf.irelifunc;
2932 elf_append_rela (output_bfd, sreloc, &outrel);
2934 /* If this reloc is against an external symbol, we
2935 do not want to fiddle with the addend. Otherwise,
2936 we need to include the symbol value so that it
2937 becomes an addend for the dynamic reloc. For an
2938 internal symbol, we have updated addend. */
2944 case R_X86_64_PLT32:
2947 case R_X86_64_GOTPCREL:
2948 case R_X86_64_GOTPCREL64:
2949 base_got = htab->elf.sgot;
2950 off = h->got.offset;
2952 if (base_got == NULL)
2955 if (off == (bfd_vma) -1)
2957 /* We can't use h->got.offset here to save state, or
2958 even just remember the offset, as finish_dynamic_symbol
2959 would use that as offset into .got. */
2961 if (htab->elf.splt != NULL)
2963 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2964 off = (plt_index + 3) * GOT_ENTRY_SIZE;
2965 base_got = htab->elf.sgotplt;
2969 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2970 off = plt_index * GOT_ENTRY_SIZE;
2971 base_got = htab->elf.igotplt;
2974 if (h->dynindx == -1
2978 /* This references the local defitionion. We must
2979 initialize this entry in the global offset table.
2980 Since the offset must always be a multiple of 8,
2981 we use the least significant bit to record
2982 whether we have initialized it already.
2984 When doing a dynamic link, we create a .rela.got
2985 relocation entry to initialize the value. This
2986 is done in the finish_dynamic_symbol routine. */
2991 bfd_put_64 (output_bfd, relocation,
2992 base_got->contents + off);
2993 /* Note that this is harmless for the GOTPLT64
2994 case, as -1 | 1 still is -1. */
3000 relocation = (base_got->output_section->vma
3001 + base_got->output_offset + off);
3003 if (r_type != R_X86_64_GOTPCREL
3004 && r_type != R_X86_64_GOTPCREL64)
3007 if (htab->elf.splt != NULL)
3008 gotplt = htab->elf.sgotplt;
3010 gotplt = htab->elf.igotplt;
3011 relocation -= (gotplt->output_section->vma
3012 - gotplt->output_offset);
3019 /* When generating a shared object, the relocations handled here are
3020 copied into the output file to be resolved at run time. */
3023 case R_X86_64_GOT32:
3024 case R_X86_64_GOT64:
3025 /* Relocation is to the entry for this symbol in the global
3027 case R_X86_64_GOTPCREL:
3028 case R_X86_64_GOTPCREL64:
3029 /* Use global offset table entry as symbol value. */
3030 case R_X86_64_GOTPLT64:
3031 /* This is the same as GOT64 for relocation purposes, but
3032 indicates the existence of a PLT entry. The difficulty is,
3033 that we must calculate the GOT slot offset from the PLT
3034 offset, if this symbol got a PLT entry (it was global).
3035 Additionally if it's computed from the PLT entry, then that
3036 GOT offset is relative to .got.plt, not to .got. */
3037 base_got = htab->elf.sgot;
3039 if (htab->elf.sgot == NULL)
3046 off = h->got.offset;
3048 && h->plt.offset != (bfd_vma)-1
3049 && off == (bfd_vma)-1)
3051 /* We can't use h->got.offset here to save
3052 state, or even just remember the offset, as
3053 finish_dynamic_symbol would use that as offset into
3055 bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3056 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3057 base_got = htab->elf.sgotplt;
3060 dyn = htab->elf.dynamic_sections_created;
3062 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3064 && SYMBOL_REFERENCES_LOCAL (info, h))
3065 || (ELF_ST_VISIBILITY (h->other)
3066 && h->root.type == bfd_link_hash_undefweak))
3068 /* This is actually a static link, or it is a -Bsymbolic
3069 link and the symbol is defined locally, or the symbol
3070 was forced to be local because of a version file. We
3071 must initialize this entry in the global offset table.
3072 Since the offset must always be a multiple of 8, we
3073 use the least significant bit to record whether we
3074 have initialized it already.
3076 When doing a dynamic link, we create a .rela.got
3077 relocation entry to initialize the value. This is
3078 done in the finish_dynamic_symbol routine. */
3083 bfd_put_64 (output_bfd, relocation,
3084 base_got->contents + off);
3085 /* Note that this is harmless for the GOTPLT64 case,
3086 as -1 | 1 still is -1. */
3091 unresolved_reloc = FALSE;
3095 if (local_got_offsets == NULL)
3098 off = local_got_offsets[r_symndx];
3100 /* The offset must always be a multiple of 8. We use
3101 the least significant bit to record whether we have
3102 already generated the necessary reloc. */
3107 bfd_put_64 (output_bfd, relocation,
3108 base_got->contents + off);
3113 Elf_Internal_Rela outrel;
3115 /* We need to generate a R_X86_64_RELATIVE reloc
3116 for the dynamic linker. */
3117 s = htab->elf.srelgot;
3121 outrel.r_offset = (base_got->output_section->vma
3122 + base_got->output_offset
3124 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3125 outrel.r_addend = relocation;
3126 elf_append_rela (output_bfd, s, &outrel);
3129 local_got_offsets[r_symndx] |= 1;
3133 if (off >= (bfd_vma) -2)
3136 relocation = base_got->output_section->vma
3137 + base_got->output_offset + off;
3138 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
3139 relocation -= htab->elf.sgotplt->output_section->vma
3140 - htab->elf.sgotplt->output_offset;
3144 case R_X86_64_GOTOFF64:
3145 /* Relocation is relative to the start of the global offset
3148 /* Check to make sure it isn't a protected function symbol
3149 for shared library since it may not be local when used
3150 as function address. */
3152 && ABI_64_P (output_bfd)
3155 && h->type == STT_FUNC
3156 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3158 (*_bfd_error_handler)
3159 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3160 input_bfd, h->root.root.string);
3161 bfd_set_error (bfd_error_bad_value);
3165 /* Note that sgot is not involved in this
3166 calculation. We always want the start of .got.plt. If we
3167 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3168 permitted by the ABI, we might have to change this
3170 relocation -= htab->elf.sgotplt->output_section->vma
3171 + htab->elf.sgotplt->output_offset;
3174 case R_X86_64_GOTPC32:
3175 case R_X86_64_GOTPC64:
3176 /* Use global offset table as symbol value. */
3177 relocation = htab->elf.sgotplt->output_section->vma
3178 + htab->elf.sgotplt->output_offset;
3179 unresolved_reloc = FALSE;
3182 case R_X86_64_PLTOFF64:
3183 /* Relocation is PLT entry relative to GOT. For local
3184 symbols it's the symbol itself relative to GOT. */
3186 /* See PLT32 handling. */
3187 && h->plt.offset != (bfd_vma) -1
3188 && htab->elf.splt != NULL)
3190 relocation = (htab->elf.splt->output_section->vma
3191 + htab->elf.splt->output_offset
3193 unresolved_reloc = FALSE;
3196 relocation -= htab->elf.sgotplt->output_section->vma
3197 + htab->elf.sgotplt->output_offset;
3200 case R_X86_64_PLT32:
3201 /* Relocation is to the entry for this symbol in the
3202 procedure linkage table. */
3204 /* Resolve a PLT32 reloc against a local symbol directly,
3205 without using the procedure linkage table. */
3209 if (h->plt.offset == (bfd_vma) -1
3210 || htab->elf.splt == NULL)
3212 /* We didn't make a PLT entry for this symbol. This
3213 happens when statically linking PIC code, or when
3214 using -Bsymbolic. */
3218 relocation = (htab->elf.splt->output_section->vma
3219 + htab->elf.splt->output_offset
3221 unresolved_reloc = FALSE;
3228 && ABI_64_P (output_bfd)
3229 && (input_section->flags & SEC_ALLOC) != 0
3230 && (input_section->flags & SEC_READONLY) != 0
3233 bfd_boolean fail = FALSE;
3235 = (r_type == R_X86_64_PC32
3236 && is_32bit_relative_branch (contents, rel->r_offset));
3238 if (SYMBOL_REFERENCES_LOCAL (info, h))
3240 /* Symbol is referenced locally. Make sure it is
3241 defined locally or for a branch. */
3242 fail = !h->def_regular && !branch;
3246 /* Symbol isn't referenced locally. We only allow
3247 branch to symbol with non-default visibility. */
3249 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3256 const char *pic = "";
3258 switch (ELF_ST_VISIBILITY (h->other))
3261 v = _("hidden symbol");
3264 v = _("internal symbol");
3267 v = _("protected symbol");
3271 pic = _("; recompile with -fPIC");
3276 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3278 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3280 (*_bfd_error_handler) (fmt, input_bfd,
3281 x86_64_elf_howto_table[r_type].name,
3282 v, h->root.root.string, pic);
3283 bfd_set_error (bfd_error_bad_value);
3294 /* FIXME: The ABI says the linker should make sure the value is
3295 the same when it's zeroextended to 64 bit. */
3297 if ((input_section->flags & SEC_ALLOC) == 0)
3302 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3303 || h->root.type != bfd_link_hash_undefweak)
3304 && (! IS_X86_64_PCREL_TYPE (r_type)
3305 || ! SYMBOL_CALLS_LOCAL (info, h)))
3306 || (ELIMINATE_COPY_RELOCS
3313 || h->root.type == bfd_link_hash_undefweak
3314 || h->root.type == bfd_link_hash_undefined)))
3316 Elf_Internal_Rela outrel;
3317 bfd_boolean skip, relocate;
3320 /* When generating a shared object, these relocations
3321 are copied into the output file to be resolved at run
3327 _bfd_elf_section_offset (output_bfd, info, input_section,
3329 if (outrel.r_offset == (bfd_vma) -1)
3331 else if (outrel.r_offset == (bfd_vma) -2)
3332 skip = TRUE, relocate = TRUE;
3334 outrel.r_offset += (input_section->output_section->vma
3335 + input_section->output_offset);
3338 memset (&outrel, 0, sizeof outrel);
3340 /* h->dynindx may be -1 if this symbol was marked to
3344 && (IS_X86_64_PCREL_TYPE (r_type)
3346 || ! SYMBOLIC_BIND (info, h)
3347 || ! h->def_regular))
3349 outrel.r_info = htab->r_info (h->dynindx, r_type);
3350 outrel.r_addend = rel->r_addend;
3354 /* This symbol is local, or marked to become local. */
3355 if (r_type == htab->pointer_r_type)
3358 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3359 outrel.r_addend = relocation + rel->r_addend;
3365 if (bfd_is_abs_section (sec))
3367 else if (sec == NULL || sec->owner == NULL)
3369 bfd_set_error (bfd_error_bad_value);
3376 /* We are turning this relocation into one
3377 against a section symbol. It would be
3378 proper to subtract the symbol's value,
3379 osec->vma, from the emitted reloc addend,
3380 but ld.so expects buggy relocs. */
3381 osec = sec->output_section;
3382 sindx = elf_section_data (osec)->dynindx;
3385 asection *oi = htab->elf.text_index_section;
3386 sindx = elf_section_data (oi)->dynindx;
3388 BFD_ASSERT (sindx != 0);
3391 outrel.r_info = htab->r_info (sindx, r_type);
3392 outrel.r_addend = relocation + rel->r_addend;
3396 sreloc = elf_section_data (input_section)->sreloc;
3398 BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
3400 elf_append_rela (output_bfd, sreloc, &outrel);
3402 /* If this reloc is against an external symbol, we do
3403 not want to fiddle with the addend. Otherwise, we
3404 need to include the symbol value so that it becomes
3405 an addend for the dynamic reloc. */
3412 case R_X86_64_TLSGD:
3413 case R_X86_64_GOTPC32_TLSDESC:
3414 case R_X86_64_TLSDESC_CALL:
3415 case R_X86_64_GOTTPOFF:
3416 tls_type = GOT_UNKNOWN;
3417 if (h == NULL && local_got_offsets)
3418 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
3420 tls_type = elf_x86_64_hash_entry (h)->tls_type;
3422 if (! elf_x86_64_tls_transition (info, input_bfd,
3423 input_section, contents,
3424 symtab_hdr, sym_hashes,
3425 &r_type, tls_type, rel,
3426 relend, h, r_symndx))
3429 if (r_type == R_X86_64_TPOFF32)
3431 bfd_vma roff = rel->r_offset;
3433 BFD_ASSERT (! unresolved_reloc);
3435 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
3437 /* GD->LE transition.
3438 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3439 .word 0x6666; rex64; call __tls_get_addr
3442 leaq foo@tpoff(%rax), %rax */
3443 memcpy (contents + roff - 4,
3444 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3446 bfd_put_32 (output_bfd,
3447 elf_x86_64_tpoff (info, relocation),
3448 contents + roff + 8);
3449 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
3453 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
3455 /* GDesc -> LE transition.
3456 It's originally something like:
3457 leaq x@tlsdesc(%rip), %rax
3460 movl $x@tpoff, %rax. */
3462 unsigned int val, type;
3464 type = bfd_get_8 (input_bfd, contents + roff - 3);
3465 val = bfd_get_8 (input_bfd, contents + roff - 1);
3466 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
3467 contents + roff - 3);
3468 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
3469 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3470 contents + roff - 1);
3471 bfd_put_32 (output_bfd,
3472 elf_x86_64_tpoff (info, relocation),
3476 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
3478 /* GDesc -> LE transition.
3483 bfd_put_8 (output_bfd, 0x66, contents + roff);
3484 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3487 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
3489 /* IE->LE transition:
3490 Originally it can be one of:
3491 movq foo@gottpoff(%rip), %reg
3492 addq foo@gottpoff(%rip), %reg
3495 leaq foo(%reg), %reg
3498 unsigned int val, type, reg;
3500 val = bfd_get_8 (input_bfd, contents + roff - 3);
3501 type = bfd_get_8 (input_bfd, contents + roff - 2);
3502 reg = bfd_get_8 (input_bfd, contents + roff - 1);
3508 bfd_put_8 (output_bfd, 0x49,
3509 contents + roff - 3);
3510 bfd_put_8 (output_bfd, 0xc7,
3511 contents + roff - 2);
3512 bfd_put_8 (output_bfd, 0xc0 | reg,
3513 contents + roff - 1);
3517 /* addq -> addq - addressing with %rsp/%r12 is
3520 bfd_put_8 (output_bfd, 0x49,
3521 contents + roff - 3);
3522 bfd_put_8 (output_bfd, 0x81,
3523 contents + roff - 2);
3524 bfd_put_8 (output_bfd, 0xc0 | reg,
3525 contents + roff - 1);
3531 bfd_put_8 (output_bfd, 0x4d,
3532 contents + roff - 3);
3533 bfd_put_8 (output_bfd, 0x8d,
3534 contents + roff - 2);
3535 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
3536 contents + roff - 1);
3538 bfd_put_32 (output_bfd,
3539 elf_x86_64_tpoff (info, relocation),
3547 if (htab->elf.sgot == NULL)
3552 off = h->got.offset;
3553 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
3557 if (local_got_offsets == NULL)
3560 off = local_got_offsets[r_symndx];
3561 offplt = local_tlsdesc_gotents[r_symndx];
3568 Elf_Internal_Rela outrel;
3572 if (htab->elf.srelgot == NULL)
3575 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3577 if (GOT_TLS_GDESC_P (tls_type))
3579 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
3580 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
3581 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
3582 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3583 + htab->elf.sgotplt->output_offset
3585 + htab->sgotplt_jump_table_size);
3586 sreloc = htab->elf.srelplt;
3588 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
3590 outrel.r_addend = 0;
3591 elf_append_rela (output_bfd, sreloc, &outrel);
3594 sreloc = htab->elf.srelgot;
3596 outrel.r_offset = (htab->elf.sgot->output_section->vma
3597 + htab->elf.sgot->output_offset + off);
3599 if (GOT_TLS_GD_P (tls_type))
3600 dr_type = R_X86_64_DTPMOD64;
3601 else if (GOT_TLS_GDESC_P (tls_type))
3604 dr_type = R_X86_64_TPOFF64;
3606 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
3607 outrel.r_addend = 0;
3608 if ((dr_type == R_X86_64_TPOFF64
3609 || dr_type == R_X86_64_TLSDESC) && indx == 0)
3610 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
3611 outrel.r_info = htab->r_info (indx, dr_type);
3613 elf_append_rela (output_bfd, sreloc, &outrel);
3615 if (GOT_TLS_GD_P (tls_type))
3619 BFD_ASSERT (! unresolved_reloc);
3620 bfd_put_64 (output_bfd,
3621 relocation - elf_x86_64_dtpoff_base (info),
3622 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3626 bfd_put_64 (output_bfd, 0,
3627 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3628 outrel.r_info = htab->r_info (indx,
3630 outrel.r_offset += GOT_ENTRY_SIZE;
3631 elf_append_rela (output_bfd, sreloc,
3640 local_got_offsets[r_symndx] |= 1;
3643 if (off >= (bfd_vma) -2
3644 && ! GOT_TLS_GDESC_P (tls_type))
3646 if (r_type == ELF32_R_TYPE (rel->r_info))
3648 if (r_type == R_X86_64_GOTPC32_TLSDESC
3649 || r_type == R_X86_64_TLSDESC_CALL)
3650 relocation = htab->elf.sgotplt->output_section->vma
3651 + htab->elf.sgotplt->output_offset
3652 + offplt + htab->sgotplt_jump_table_size;
3654 relocation = htab->elf.sgot->output_section->vma
3655 + htab->elf.sgot->output_offset + off;
3656 unresolved_reloc = FALSE;
3660 bfd_vma roff = rel->r_offset;
3662 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
3664 /* GD->IE transition.
3665 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3666 .word 0x6666; rex64; call __tls_get_addr@plt
3669 addq foo@gottpoff(%rip), %rax */
3670 memcpy (contents + roff - 4,
3671 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3674 relocation = (htab->elf.sgot->output_section->vma
3675 + htab->elf.sgot->output_offset + off
3677 - input_section->output_section->vma
3678 - input_section->output_offset
3680 bfd_put_32 (output_bfd, relocation,
3681 contents + roff + 8);
3682 /* Skip R_X86_64_PLT32. */
3686 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
3688 /* GDesc -> IE transition.
3689 It's originally something like:
3690 leaq x@tlsdesc(%rip), %rax
3693 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
3695 /* Now modify the instruction as appropriate. To
3696 turn a leaq into a movq in the form we use it, it
3697 suffices to change the second byte from 0x8d to
3699 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3701 bfd_put_32 (output_bfd,
3702 htab->elf.sgot->output_section->vma
3703 + htab->elf.sgot->output_offset + off
3705 - input_section->output_section->vma
3706 - input_section->output_offset
3711 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
3713 /* GDesc -> IE transition.
3720 bfd_put_8 (output_bfd, 0x66, contents + roff);
3721 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3729 case R_X86_64_TLSLD:
3730 if (! elf_x86_64_tls_transition (info, input_bfd,
3731 input_section, contents,
3732 symtab_hdr, sym_hashes,
3733 &r_type, GOT_UNKNOWN,
3734 rel, relend, h, r_symndx))
3737 if (r_type != R_X86_64_TLSLD)
3739 /* LD->LE transition:
3740 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
3742 .word 0x6666; .byte 0x66; movl %fs:0, %rax. */
3744 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
3745 memcpy (contents + rel->r_offset - 3,
3746 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3747 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
3752 if (htab->elf.sgot == NULL)
3755 off = htab->tls_ld_got.offset;
3760 Elf_Internal_Rela outrel;
3762 if (htab->elf.srelgot == NULL)
3765 outrel.r_offset = (htab->elf.sgot->output_section->vma
3766 + htab->elf.sgot->output_offset + off);
3768 bfd_put_64 (output_bfd, 0,
3769 htab->elf.sgot->contents + off);
3770 bfd_put_64 (output_bfd, 0,
3771 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3772 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
3773 outrel.r_addend = 0;
3774 elf_append_rela (output_bfd, htab->elf.srelgot,
3776 htab->tls_ld_got.offset |= 1;
3778 relocation = htab->elf.sgot->output_section->vma
3779 + htab->elf.sgot->output_offset + off;
3780 unresolved_reloc = FALSE;
3783 case R_X86_64_DTPOFF32:
3784 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
3785 relocation -= elf_x86_64_dtpoff_base (info);
3787 relocation = elf_x86_64_tpoff (info, relocation);
3790 case R_X86_64_TPOFF32:
3791 BFD_ASSERT (info->executable);
3792 relocation = elf_x86_64_tpoff (info, relocation);
3799 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3800 because such sections are not SEC_ALLOC and thus ld.so will
3801 not process them. */
3802 if (unresolved_reloc
3803 && !((input_section->flags & SEC_DEBUGGING) != 0
3805 (*_bfd_error_handler)
3806 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3809 (long) rel->r_offset,
3811 h->root.root.string);
3814 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3815 contents, rel->r_offset,
3816 relocation, rel->r_addend);
3818 if (r != bfd_reloc_ok)
3823 name = h->root.root.string;
3826 name = bfd_elf_string_from_elf_section (input_bfd,
3827 symtab_hdr->sh_link,
3832 name = bfd_section_name (input_bfd, sec);
3835 if (r == bfd_reloc_overflow)
3837 if (! ((*info->callbacks->reloc_overflow)
3838 (info, (h ? &h->root : NULL), name, howto->name,
3839 (bfd_vma) 0, input_bfd, input_section,
3845 (*_bfd_error_handler)
3846 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3847 input_bfd, input_section,
3848 (long) rel->r_offset, name, (int) r);
3857 /* Finish up dynamic symbol handling. We set the contents of various
3858 dynamic sections here. */
3861 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
3862 struct bfd_link_info *info,
3863 struct elf_link_hash_entry *h,
3864 Elf_Internal_Sym *sym)
3866 struct elf_x86_64_link_hash_table *htab;
3868 htab = elf_x86_64_hash_table (info);
3872 if (h->plt.offset != (bfd_vma) -1)
3876 Elf_Internal_Rela rela;
3878 asection *plt, *gotplt, *relplt;
3879 const struct elf_backend_data *bed;
3881 /* When building a static executable, use .iplt, .igot.plt and
3882 .rela.iplt sections for STT_GNU_IFUNC symbols. */
3883 if (htab->elf.splt != NULL)
3885 plt = htab->elf.splt;
3886 gotplt = htab->elf.sgotplt;
3887 relplt = htab->elf.srelplt;
3891 plt = htab->elf.iplt;
3892 gotplt = htab->elf.igotplt;
3893 relplt = htab->elf.irelplt;
3896 /* This symbol has an entry in the procedure linkage table. Set
3898 if ((h->dynindx == -1
3899 && !((h->forced_local || info->executable)
3901 && h->type == STT_GNU_IFUNC))
3907 /* Get the index in the procedure linkage table which
3908 corresponds to this symbol. This is the index of this symbol
3909 in all the symbols for which we are making plt entries. The
3910 first entry in the procedure linkage table is reserved.
3912 Get the offset into the .got table of the entry that
3913 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
3914 bytes. The first three are reserved for the dynamic linker.
3916 For static executables, we don't reserve anything. */
3918 if (plt == htab->elf.splt)
3920 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3921 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3925 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
3926 got_offset = plt_index * GOT_ENTRY_SIZE;
3929 /* Fill in the entry in the procedure linkage table. */
3930 memcpy (plt->contents + h->plt.offset, elf_x86_64_plt_entry,
3933 /* Insert the relocation positions of the plt section. The magic
3934 numbers at the end of the statements are the positions of the
3935 relocations in the plt section. */
3936 /* Put offset for jmp *name@GOTPCREL(%rip), since the
3937 instruction uses 6 bytes, subtract this value. */
3938 bfd_put_32 (output_bfd,
3939 (gotplt->output_section->vma
3940 + gotplt->output_offset
3942 - plt->output_section->vma
3943 - plt->output_offset
3946 plt->contents + h->plt.offset + 2);
3948 /* Don't fill PLT entry for static executables. */
3949 if (plt == htab->elf.splt)
3951 /* Put relocation index. */
3952 bfd_put_32 (output_bfd, plt_index,
3953 plt->contents + h->plt.offset + 7);
3954 /* Put offset for jmp .PLT0. */
3955 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
3956 plt->contents + h->plt.offset + 12);
3959 /* Fill in the entry in the global offset table, initially this
3960 points to the pushq instruction in the PLT which is at offset 6. */
3961 bfd_put_64 (output_bfd, (plt->output_section->vma
3962 + plt->output_offset
3963 + h->plt.offset + 6),
3964 gotplt->contents + got_offset);
3966 /* Fill in the entry in the .rela.plt section. */
3967 rela.r_offset = (gotplt->output_section->vma
3968 + gotplt->output_offset
3970 if (h->dynindx == -1
3971 || ((info->executable
3972 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3974 && h->type == STT_GNU_IFUNC))
3976 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3977 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
3978 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3979 rela.r_addend = (h->root.u.def.value
3980 + h->root.u.def.section->output_section->vma
3981 + h->root.u.def.section->output_offset);
3985 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
3989 bed = get_elf_backend_data (output_bfd);
3990 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
3991 bed->s->swap_reloca_out (output_bfd, &rela, loc);
3993 if (!h->def_regular)
3995 /* Mark the symbol as undefined, rather than as defined in
3996 the .plt section. Leave the value if there were any
3997 relocations where pointer equality matters (this is a clue
3998 for the dynamic linker, to make function pointer
3999 comparisons work between an application and shared
4000 library), otherwise set it to zero. If a function is only
4001 called from a binary, there is no need to slow down
4002 shared libraries because of that. */
4003 sym->st_shndx = SHN_UNDEF;
4004 if (!h->pointer_equality_needed)
4009 if (h->got.offset != (bfd_vma) -1
4010 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
4011 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
4013 Elf_Internal_Rela rela;
4015 /* This symbol has an entry in the global offset table. Set it
4017 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4020 rela.r_offset = (htab->elf.sgot->output_section->vma
4021 + htab->elf.sgot->output_offset
4022 + (h->got.offset &~ (bfd_vma) 1));
4024 /* If this is a static link, or it is a -Bsymbolic link and the
4025 symbol is defined locally or was forced to be local because
4026 of a version file, we just want to emit a RELATIVE reloc.
4027 The entry in the global offset table will already have been
4028 initialized in the relocate_section function. */
4030 && h->type == STT_GNU_IFUNC)
4034 /* Generate R_X86_64_GLOB_DAT. */
4041 if (!h->pointer_equality_needed)
4044 /* For non-shared object, we can't use .got.plt, which
4045 contains the real function addres if we need pointer
4046 equality. We load the GOT entry with the PLT entry. */
4047 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4048 bfd_put_64 (output_bfd, (plt->output_section->vma
4049 + plt->output_offset
4051 htab->elf.sgot->contents + h->got.offset);
4055 else if (info->shared
4056 && SYMBOL_REFERENCES_LOCAL (info, h))
4058 if (!h->def_regular)
4060 BFD_ASSERT((h->got.offset & 1) != 0);
4061 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4062 rela.r_addend = (h->root.u.def.value
4063 + h->root.u.def.section->output_section->vma
4064 + h->root.u.def.section->output_offset);
4068 BFD_ASSERT((h->got.offset & 1) == 0);
4070 bfd_put_64 (output_bfd, (bfd_vma) 0,
4071 htab->elf.sgot->contents + h->got.offset);
4072 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
4076 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
4081 Elf_Internal_Rela rela;
4083 /* This symbol needs a copy reloc. Set it up. */
4085 if (h->dynindx == -1
4086 || (h->root.type != bfd_link_hash_defined
4087 && h->root.type != bfd_link_hash_defweak)
4088 || htab->srelbss == NULL)
4091 rela.r_offset = (h->root.u.def.value
4092 + h->root.u.def.section->output_section->vma
4093 + h->root.u.def.section->output_offset);
4094 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
4096 elf_append_rela (output_bfd, htab->srelbss, &rela);
4099 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4100 be NULL for local symbols. */
4102 && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4103 || h == htab->elf.hgot))
4104 sym->st_shndx = SHN_ABS;
4109 /* Finish up local dynamic symbol handling. We set the contents of
4110 various dynamic sections here. */
4113 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
4115 struct elf_link_hash_entry *h
4116 = (struct elf_link_hash_entry *) *slot;
4117 struct bfd_link_info *info
4118 = (struct bfd_link_info *) inf;
4120 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
4124 /* Used to decide how to sort relocs in an optimal manner for the
4125 dynamic linker, before writing them out. */
4127 static enum elf_reloc_type_class
4128 elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
4130 switch ((int) ELF32_R_TYPE (rela->r_info))
4132 case R_X86_64_RELATIVE:
4133 return reloc_class_relative;
4134 case R_X86_64_JUMP_SLOT:
4135 return reloc_class_plt;
4137 return reloc_class_copy;
4139 return reloc_class_normal;
4143 /* Finish up the dynamic sections. */
4146 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
4147 struct bfd_link_info *info)
4149 struct elf_x86_64_link_hash_table *htab;
4153 htab = elf_x86_64_hash_table (info);
4157 dynobj = htab->elf.dynobj;
4158 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4160 if (htab->elf.dynamic_sections_created)
4162 bfd_byte *dyncon, *dynconend;
4163 const struct elf_backend_data *bed;
4164 bfd_size_type sizeof_dyn;
4166 if (sdyn == NULL || htab->elf.sgot == NULL)
4169 bed = get_elf_backend_data (dynobj);
4170 sizeof_dyn = bed->s->sizeof_dyn;
4171 dyncon = sdyn->contents;
4172 dynconend = sdyn->contents + sdyn->size;
4173 for (; dyncon < dynconend; dyncon += sizeof_dyn)
4175 Elf_Internal_Dyn dyn;
4178 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
4186 s = htab->elf.sgotplt;
4187 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4191 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
4195 s = htab->elf.srelplt->output_section;
4196 dyn.d_un.d_val = s->size;
4200 /* The procedure linkage table relocs (DT_JMPREL) should
4201 not be included in the overall relocs (DT_RELA).
4202 Therefore, we override the DT_RELASZ entry here to
4203 make it not include the JMPREL relocs. Since the
4204 linker script arranges for .rela.plt to follow all
4205 other relocation sections, we don't have to worry
4206 about changing the DT_RELA entry. */
4207 if (htab->elf.srelplt != NULL)
4209 s = htab->elf.srelplt->output_section;
4210 dyn.d_un.d_val -= s->size;
4214 case DT_TLSDESC_PLT:
4216 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4217 + htab->tlsdesc_plt;
4220 case DT_TLSDESC_GOT:
4222 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4223 + htab->tlsdesc_got;
4227 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
4230 /* Fill in the special first entry in the procedure linkage table. */
4231 if (htab->elf.splt && htab->elf.splt->size > 0)
4233 /* Fill in the first entry in the procedure linkage table. */
4234 memcpy (htab->elf.splt->contents, elf_x86_64_plt0_entry,
4236 /* Add offset for pushq GOT+8(%rip), since the instruction
4237 uses 6 bytes subtract this value. */
4238 bfd_put_32 (output_bfd,
4239 (htab->elf.sgotplt->output_section->vma
4240 + htab->elf.sgotplt->output_offset
4242 - htab->elf.splt->output_section->vma
4243 - htab->elf.splt->output_offset
4245 htab->elf.splt->contents + 2);
4246 /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to
4247 the end of the instruction. */
4248 bfd_put_32 (output_bfd,
4249 (htab->elf.sgotplt->output_section->vma
4250 + htab->elf.sgotplt->output_offset
4252 - htab->elf.splt->output_section->vma
4253 - htab->elf.splt->output_offset
4255 htab->elf.splt->contents + 8);
4257 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize =
4260 if (htab->tlsdesc_plt)
4262 bfd_put_64 (output_bfd, (bfd_vma) 0,
4263 htab->elf.sgot->contents + htab->tlsdesc_got);
4265 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
4266 elf_x86_64_plt0_entry,
4269 /* Add offset for pushq GOT+8(%rip), since the
4270 instruction uses 6 bytes subtract this value. */
4271 bfd_put_32 (output_bfd,
4272 (htab->elf.sgotplt->output_section->vma
4273 + htab->elf.sgotplt->output_offset
4275 - htab->elf.splt->output_section->vma
4276 - htab->elf.splt->output_offset
4279 htab->elf.splt->contents + htab->tlsdesc_plt + 2);
4280 /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for
4281 htab->tlsdesc_got. The 12 is the offset to the end of
4283 bfd_put_32 (output_bfd,
4284 (htab->elf.sgot->output_section->vma
4285 + htab->elf.sgot->output_offset
4287 - htab->elf.splt->output_section->vma
4288 - htab->elf.splt->output_offset
4291 htab->elf.splt->contents + htab->tlsdesc_plt + 8);
4296 if (htab->elf.sgotplt)
4298 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4300 (*_bfd_error_handler)
4301 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4305 /* Fill in the first three entries in the global offset table. */
4306 if (htab->elf.sgotplt->size > 0)
4308 /* Set the first entry in the global offset table to the address of
4309 the dynamic section. */
4311 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
4313 bfd_put_64 (output_bfd,
4314 sdyn->output_section->vma + sdyn->output_offset,
4315 htab->elf.sgotplt->contents);
4316 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4317 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
4318 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
4321 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
4325 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4326 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
4329 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4330 htab_traverse (htab->loc_hash_table,
4331 elf_x86_64_finish_local_dynamic_symbol,
4337 /* Return address for Ith PLT stub in section PLT, for relocation REL
4338 or (bfd_vma) -1 if it should not be included. */
4341 elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
4342 const arelent *rel ATTRIBUTE_UNUSED)
4344 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4347 /* Handle an x86-64 specific section when reading an object file. This
4348 is called when elfcode.h finds a section with an unknown type. */
4351 elf_x86_64_section_from_shdr (bfd *abfd,
4352 Elf_Internal_Shdr *hdr,
4356 if (hdr->sh_type != SHT_X86_64_UNWIND)
4359 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
4365 /* Hook called by the linker routine which adds symbols from an object
4366 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4370 elf_x86_64_add_symbol_hook (bfd *abfd,
4371 struct bfd_link_info *info,
4372 Elf_Internal_Sym *sym,
4373 const char **namep ATTRIBUTE_UNUSED,
4374 flagword *flagsp ATTRIBUTE_UNUSED,
4380 switch (sym->st_shndx)
4382 case SHN_X86_64_LCOMMON:
4383 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
4386 lcomm = bfd_make_section_with_flags (abfd,
4390 | SEC_LINKER_CREATED));
4393 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
4396 *valp = sym->st_size;
4400 if ((abfd->flags & DYNAMIC) == 0
4401 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4402 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4408 /* Given a BFD section, try to locate the corresponding ELF section
4412 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
4413 asection *sec, int *index_return)
4415 if (sec == &_bfd_elf_large_com_section)
4417 *index_return = SHN_X86_64_LCOMMON;
4423 /* Process a symbol. */
4426 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
4429 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
4431 switch (elfsym->internal_elf_sym.st_shndx)
4433 case SHN_X86_64_LCOMMON:
4434 asym->section = &_bfd_elf_large_com_section;
4435 asym->value = elfsym->internal_elf_sym.st_size;
4436 /* Common symbol doesn't set BSF_GLOBAL. */
4437 asym->flags &= ~BSF_GLOBAL;
4443 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
4445 return (sym->st_shndx == SHN_COMMON
4446 || sym->st_shndx == SHN_X86_64_LCOMMON);
4450 elf_x86_64_common_section_index (asection *sec)
4452 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
4455 return SHN_X86_64_LCOMMON;
4459 elf_x86_64_common_section (asection *sec)
4461 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
4462 return bfd_com_section_ptr;
4464 return &_bfd_elf_large_com_section;
4468 elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
4469 struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED,
4470 struct elf_link_hash_entry *h,
4471 Elf_Internal_Sym *sym,
4473 bfd_vma *pvalue ATTRIBUTE_UNUSED,
4474 unsigned int *pold_alignment ATTRIBUTE_UNUSED,
4475 bfd_boolean *skip ATTRIBUTE_UNUSED,
4476 bfd_boolean *override ATTRIBUTE_UNUSED,
4477 bfd_boolean *type_change_ok ATTRIBUTE_UNUSED,
4478 bfd_boolean *size_change_ok ATTRIBUTE_UNUSED,
4479 bfd_boolean *newdef ATTRIBUTE_UNUSED,
4480 bfd_boolean *newdyn,
4481 bfd_boolean *newdyncommon ATTRIBUTE_UNUSED,
4482 bfd_boolean *newweak ATTRIBUTE_UNUSED,
4483 bfd *abfd ATTRIBUTE_UNUSED,
4485 bfd_boolean *olddef ATTRIBUTE_UNUSED,
4486 bfd_boolean *olddyn,
4487 bfd_boolean *olddyncommon ATTRIBUTE_UNUSED,
4488 bfd_boolean *oldweak ATTRIBUTE_UNUSED,
4492 /* A normal common symbol and a large common symbol result in a
4493 normal common symbol. We turn the large common symbol into a
4496 && h->root.type == bfd_link_hash_common
4498 && bfd_is_com_section (*sec)
4501 if (sym->st_shndx == SHN_COMMON
4502 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0)
4504 h->root.u.c.p->section
4505 = bfd_make_section_old_way (oldbfd, "COMMON");
4506 h->root.u.c.p->section->flags = SEC_ALLOC;
4508 else if (sym->st_shndx == SHN_X86_64_LCOMMON
4509 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0)
4510 *psec = *sec = bfd_com_section_ptr;
4517 elf_x86_64_additional_program_headers (bfd *abfd,
4518 struct bfd_link_info *info ATTRIBUTE_UNUSED)
4523 /* Check to see if we need a large readonly segment. */
4524 s = bfd_get_section_by_name (abfd, ".lrodata");
4525 if (s && (s->flags & SEC_LOAD))
4528 /* Check to see if we need a large data segment. Since .lbss sections
4529 is placed right after the .bss section, there should be no need for
4530 a large data segment just because of .lbss. */
4531 s = bfd_get_section_by_name (abfd, ".ldata");
4532 if (s && (s->flags & SEC_LOAD))
4538 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4541 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
4543 if (h->plt.offset != (bfd_vma) -1
4545 && !h->pointer_equality_needed)
4548 return _bfd_elf_hash_symbol (h);
4551 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
4554 elf_x86_64_relocs_compatible (const bfd_target *input,
4555 const bfd_target *output)
4557 return ((xvec_get_elf_backend_data (input)->s->elfclass
4558 == xvec_get_elf_backend_data (output)->s->elfclass)
4559 && _bfd_elf_relocs_compatible (input, output));
4562 static const struct bfd_elf_special_section
4563 elf_x86_64_special_sections[]=
4565 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
4566 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
4567 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
4568 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
4569 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
4570 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
4571 { NULL, 0, 0, 0, 0 }
4574 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
4575 #define TARGET_LITTLE_NAME "elf64-x86-64"
4576 #define ELF_ARCH bfd_arch_i386
4577 #define ELF_TARGET_ID X86_64_ELF_DATA
4578 #define ELF_MACHINE_CODE EM_X86_64
4579 #define ELF_MAXPAGESIZE 0x200000
4580 #define ELF_MINPAGESIZE 0x1000
4581 #define ELF_COMMONPAGESIZE 0x1000
4583 #define elf_backend_can_gc_sections 1
4584 #define elf_backend_can_refcount 1
4585 #define elf_backend_want_got_plt 1
4586 #define elf_backend_plt_readonly 1
4587 #define elf_backend_want_plt_sym 0
4588 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
4589 #define elf_backend_rela_normal 1
4591 #define elf_info_to_howto elf_x86_64_info_to_howto
4593 #define bfd_elf64_bfd_link_hash_table_create \
4594 elf_x86_64_link_hash_table_create
4595 #define bfd_elf64_bfd_link_hash_table_free \
4596 elf_x86_64_link_hash_table_free
4597 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
4598 #define bfd_elf64_bfd_reloc_name_lookup \
4599 elf_x86_64_reloc_name_lookup
4601 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
4602 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
4603 #define elf_backend_check_relocs elf_x86_64_check_relocs
4604 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
4605 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
4606 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
4607 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
4608 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
4609 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
4610 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
4611 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
4612 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
4613 #define elf_backend_relocate_section elf_x86_64_relocate_section
4614 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
4615 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
4616 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4617 #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
4618 #define elf_backend_object_p elf64_x86_64_elf_object_p
4619 #define bfd_elf64_mkobject elf_x86_64_mkobject
4621 #define elf_backend_section_from_shdr \
4622 elf_x86_64_section_from_shdr
4624 #define elf_backend_section_from_bfd_section \
4625 elf_x86_64_elf_section_from_bfd_section
4626 #define elf_backend_add_symbol_hook \
4627 elf_x86_64_add_symbol_hook
4628 #define elf_backend_symbol_processing \
4629 elf_x86_64_symbol_processing
4630 #define elf_backend_common_section_index \
4631 elf_x86_64_common_section_index
4632 #define elf_backend_common_section \
4633 elf_x86_64_common_section
4634 #define elf_backend_common_definition \
4635 elf_x86_64_common_definition
4636 #define elf_backend_merge_symbol \
4637 elf_x86_64_merge_symbol
4638 #define elf_backend_special_sections \
4639 elf_x86_64_special_sections
4640 #define elf_backend_additional_program_headers \
4641 elf_x86_64_additional_program_headers
4642 #define elf_backend_hash_symbol \
4643 elf_x86_64_hash_symbol
4645 #undef elf_backend_post_process_headers
4646 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4648 #include "elf64-target.h"
4650 /* FreeBSD support. */
4652 #undef TARGET_LITTLE_SYM
4653 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
4654 #undef TARGET_LITTLE_NAME
4655 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
4658 #define ELF_OSABI ELFOSABI_FREEBSD
4661 #define elf64_bed elf64_x86_64_fbsd_bed
4663 #include "elf64-target.h"
4665 /* Solaris 2 support. */
4667 #undef TARGET_LITTLE_SYM
4668 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
4669 #undef TARGET_LITTLE_NAME
4670 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
4672 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4673 objects won't be recognized. */
4677 #define elf64_bed elf64_x86_64_sol2_bed
4679 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
4681 #undef elf_backend_static_tls_alignment
4682 #define elf_backend_static_tls_alignment 16
4684 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4686 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4688 #undef elf_backend_want_plt_sym
4689 #define elf_backend_want_plt_sym 1
4691 #include "elf64-target.h"
4693 /* Intel L1OM support. */
4696 elf64_l1om_elf_object_p (bfd *abfd)
4698 /* Set the right machine number for an L1OM elf64 file. */
4699 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
4703 #undef TARGET_LITTLE_SYM
4704 #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
4705 #undef TARGET_LITTLE_NAME
4706 #define TARGET_LITTLE_NAME "elf64-l1om"
4708 #define ELF_ARCH bfd_arch_l1om
4710 #undef ELF_MACHINE_CODE
4711 #define ELF_MACHINE_CODE EM_L1OM
4716 #define elf64_bed elf64_l1om_bed
4718 #undef elf_backend_object_p
4719 #define elf_backend_object_p elf64_l1om_elf_object_p
4721 #undef elf_backend_post_process_headers
4722 #undef elf_backend_static_tls_alignment
4724 #undef elf_backend_want_plt_sym
4725 #define elf_backend_want_plt_sym 0
4727 #include "elf64-target.h"
4729 /* FreeBSD L1OM support. */
4731 #undef TARGET_LITTLE_SYM
4732 #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
4733 #undef TARGET_LITTLE_NAME
4734 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
4737 #define ELF_OSABI ELFOSABI_FREEBSD
4740 #define elf64_bed elf64_l1om_fbsd_bed
4742 #undef elf_backend_post_process_headers
4743 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4745 #include "elf64-target.h"
4747 /* 32bit x86-64 support. */
4750 elf32_x86_64_elf_object_p (bfd *abfd)
4752 /* Set the right machine number for an x86-64 elf32 file. */
4753 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
4757 #undef TARGET_LITTLE_SYM
4758 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
4759 #undef TARGET_LITTLE_NAME
4760 #define TARGET_LITTLE_NAME "elf32-x86-64"
4763 #define ELF_ARCH bfd_arch_i386
4765 #undef ELF_MACHINE_CODE
4766 #define ELF_MACHINE_CODE EM_X86_64
4768 #define bfd_elf32_bfd_link_hash_table_create \
4769 elf_x86_64_link_hash_table_create
4770 #define bfd_elf32_bfd_link_hash_table_free \
4771 elf_x86_64_link_hash_table_free
4772 #define bfd_elf32_bfd_reloc_type_lookup \
4773 elf_x86_64_reloc_type_lookup
4774 #define bfd_elf32_bfd_reloc_name_lookup \
4775 elf_x86_64_reloc_name_lookup
4776 #define bfd_elf32_mkobject \
4781 #undef elf_backend_post_process_headers
4783 #undef elf_backend_object_p
4784 #define elf_backend_object_p \
4785 elf32_x86_64_elf_object_p
4787 #undef elf_backend_bfd_from_remote_memory
4788 #define elf_backend_bfd_from_remote_memory \
4789 _bfd_elf32_bfd_from_remote_memory
4791 #undef elf_backend_size_info
4792 #define elf_backend_size_info \
4793 _bfd_elf32_size_info
4795 #include "elf32-target.h"