1 /* X86-64 specific support for ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
4 Free Software Foundation, Inc.
5 Contributed by Jan Hubicka <jh@suse.cz>.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
29 #include "bfd_stdint.h"
34 #include "elf/x86-64.h"
41 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
42 #define MINUS_ONE (~ (bfd_vma) 0)
44 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
45 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
46 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
47 since they are the same. */
49 #define ABI_64_P(abfd) \
50 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
52 /* The relocation "howto" table. Order of fields:
53 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
54 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
55 static reloc_howto_type x86_64_elf_howto_table[] =
57 HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
60 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
63 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
64 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
66 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
67 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
69 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
70 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
72 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
75 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
78 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
81 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
84 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
85 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
87 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
88 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
90 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
91 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
93 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
95 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
97 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
99 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
100 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
101 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
104 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
107 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
110 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
113 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
114 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
116 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
117 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
119 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
120 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
122 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
123 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
125 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
128 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
130 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
131 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
132 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
133 FALSE, 0xffffffff, 0xffffffff, TRUE),
134 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
135 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
137 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
138 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
140 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
141 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
142 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
143 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
144 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
146 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
147 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
151 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
152 complain_overflow_bitfield, bfd_elf_generic_reloc,
153 "R_X86_64_GOTPC32_TLSDESC",
154 FALSE, 0xffffffff, 0xffffffff, TRUE),
155 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
156 complain_overflow_dont, bfd_elf_generic_reloc,
157 "R_X86_64_TLSDESC_CALL",
159 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
160 complain_overflow_bitfield, bfd_elf_generic_reloc,
162 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
163 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
167 /* We have a gap in the reloc numbers here.
168 R_X86_64_standard counts the number up to this point, and
169 R_X86_64_vt_offset is the value to subtract from a reloc type of
170 R_X86_64_GNU_VT* to form an index into this table. */
171 #define R_X86_64_standard (R_X86_64_IRELATIVE + 1)
172 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
174 /* GNU extension to record C++ vtable hierarchy. */
175 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
176 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
178 /* GNU extension to record C++ vtable member usage. */
179 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
180 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
184 #define IS_X86_64_PCREL_TYPE(TYPE) \
185 ( ((TYPE) == R_X86_64_PC8) \
186 || ((TYPE) == R_X86_64_PC16) \
187 || ((TYPE) == R_X86_64_PC32) \
188 || ((TYPE) == R_X86_64_PC64))
190 /* Map BFD relocs to the x86_64 elf relocs. */
193 bfd_reloc_code_real_type bfd_reloc_val;
194 unsigned char elf_reloc_val;
197 static const struct elf_reloc_map x86_64_reloc_map[] =
199 { BFD_RELOC_NONE, R_X86_64_NONE, },
200 { BFD_RELOC_64, R_X86_64_64, },
201 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
202 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
203 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
204 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
205 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
206 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
207 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
208 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
209 { BFD_RELOC_32, R_X86_64_32, },
210 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
211 { BFD_RELOC_16, R_X86_64_16, },
212 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
213 { BFD_RELOC_8, R_X86_64_8, },
214 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
215 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
216 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
217 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
218 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
219 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
220 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
221 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
222 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
223 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
224 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
225 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
226 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
227 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
228 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
229 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
230 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
231 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
232 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
233 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
234 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
235 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
236 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
239 static reloc_howto_type *
240 elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
244 if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
245 || r_type >= (unsigned int) R_X86_64_max)
247 if (r_type >= (unsigned int) R_X86_64_standard)
249 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
251 r_type = R_X86_64_NONE;
256 i = r_type - (unsigned int) R_X86_64_vt_offset;
257 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
258 return &x86_64_elf_howto_table[i];
261 /* Given a BFD reloc type, return a HOWTO structure. */
262 static reloc_howto_type *
263 elf_x86_64_reloc_type_lookup (bfd *abfd,
264 bfd_reloc_code_real_type code)
268 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
271 if (x86_64_reloc_map[i].bfd_reloc_val == code)
272 return elf_x86_64_rtype_to_howto (abfd,
273 x86_64_reloc_map[i].elf_reloc_val);
278 static reloc_howto_type *
279 elf_x86_64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
285 i < (sizeof (x86_64_elf_howto_table)
286 / sizeof (x86_64_elf_howto_table[0]));
288 if (x86_64_elf_howto_table[i].name != NULL
289 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
290 return &x86_64_elf_howto_table[i];
295 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
298 elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
299 Elf_Internal_Rela *dst)
303 r_type = ELF32_R_TYPE (dst->r_info);
304 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
305 BFD_ASSERT (r_type == cache_ptr->howto->type);
308 /* Support for core dump NOTE sections. */
310 elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
315 switch (note->descsz)
320 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
322 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
325 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
333 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
335 elf_tdata (abfd)->core_signal
336 = bfd_get_16 (abfd, note->descdata + 12);
339 elf_tdata (abfd)->core_lwpid
340 = bfd_get_32 (abfd, note->descdata + 32);
349 /* Make a ".reg/999" section. */
350 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
351 size, note->descpos + offset);
355 elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
357 switch (note->descsz)
362 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
363 elf_tdata (abfd)->core_pid
364 = bfd_get_32 (abfd, note->descdata + 12);
365 elf_tdata (abfd)->core_program
366 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
367 elf_tdata (abfd)->core_command
368 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
371 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
372 elf_tdata (abfd)->core_pid
373 = bfd_get_32 (abfd, note->descdata + 24);
374 elf_tdata (abfd)->core_program
375 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
376 elf_tdata (abfd)->core_command
377 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
380 /* Note that for some reason, a spurious space is tacked
381 onto the end of the args in some (at least one anyway)
382 implementations, so strip it off if it exists. */
385 char *command = elf_tdata (abfd)->core_command;
386 int n = strlen (command);
388 if (0 < n && command[n - 1] == ' ')
389 command[n - 1] = '\0';
397 elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
400 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
404 const char *fname, *psargs;
415 va_start (ap, note_type);
416 fname = va_arg (ap, const char *);
417 psargs = va_arg (ap, const char *);
420 if (bed->s->elfclass == ELFCLASS32)
423 memset (&data, 0, sizeof (data));
424 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
425 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
426 p = (const void *) &data;
427 size = sizeof (data);
432 memset (&data, 0, sizeof (data));
433 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
434 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
435 p = (const void *) &data;
436 size = sizeof (data);
441 va_start (ap, note_type);
442 pid = va_arg (ap, long);
443 cursig = va_arg (ap, int);
444 gregs = va_arg (ap, const void *);
447 if (bed->s->elfclass == ELFCLASS32)
449 if (bed->elf_machine_code == EM_X86_64)
451 prstatusx32_t prstat;
452 memset (&prstat, 0, sizeof (prstat));
454 prstat.pr_cursig = cursig;
455 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
456 p = (const void *) &prstat;
457 size = sizeof (prstat);
462 memset (&prstat, 0, sizeof (prstat));
464 prstat.pr_cursig = cursig;
465 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
466 p = (const void *) &prstat;
467 size = sizeof (prstat);
473 memset (&prstat, 0, sizeof (prstat));
475 prstat.pr_cursig = cursig;
476 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
477 p = (const void *) &prstat;
478 size = sizeof (prstat);
483 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, p,
488 /* Functions for the x86-64 ELF linker. */
490 /* The name of the dynamic interpreter. This is put in the .interp
493 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
494 #define ELF32_DYNAMIC_INTERPRETER "/lib/ld32.so.1"
496 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
497 copying dynamic variables from a shared lib into an app's dynbss
498 section, and instead use a dynamic relocation to point into the
500 #define ELIMINATE_COPY_RELOCS 1
502 /* The size in bytes of an entry in the global offset table. */
504 #define GOT_ENTRY_SIZE 8
506 /* The size in bytes of an entry in the procedure linkage table. */
508 #define PLT_ENTRY_SIZE 16
510 /* The first entry in a procedure linkage table looks like this. See the
511 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
513 static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
515 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
516 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
517 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
520 /* Subsequent entries in a procedure linkage table look like this. */
522 static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
524 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
525 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
526 0x68, /* pushq immediate */
527 0, 0, 0, 0, /* replaced with index into relocation table. */
528 0xe9, /* jmp relative */
529 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
532 /* .eh_frame covering the .plt section. */
534 static const bfd_byte elf_x86_64_eh_frame_plt[] =
536 #define PLT_CIE_LENGTH 20
537 #define PLT_FDE_LENGTH 36
538 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
539 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
540 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
541 0, 0, 0, 0, /* CIE ID */
543 'z', 'R', 0, /* Augmentation string */
544 1, /* Code alignment factor */
545 0x78, /* Data alignment factor */
546 16, /* Return address column */
547 1, /* Augmentation size */
548 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
549 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
550 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
551 DW_CFA_nop, DW_CFA_nop,
553 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
554 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
555 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
556 0, 0, 0, 0, /* .plt size goes here */
557 0, /* Augmentation size */
558 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
559 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
560 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
561 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
562 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
563 11, /* Block length */
564 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
565 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
566 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
567 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
568 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
571 /* x86-64 ELF linker hash entry. */
573 struct elf_x86_64_link_hash_entry
575 struct elf_link_hash_entry elf;
577 /* Track dynamic relocs copied for this symbol. */
578 struct elf_dyn_relocs *dyn_relocs;
580 #define GOT_UNKNOWN 0
584 #define GOT_TLS_GDESC 4
585 #define GOT_TLS_GD_BOTH_P(type) \
586 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
587 #define GOT_TLS_GD_P(type) \
588 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
589 #define GOT_TLS_GDESC_P(type) \
590 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
591 #define GOT_TLS_GD_ANY_P(type) \
592 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
593 unsigned char tls_type;
595 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
596 starting at the end of the jump table. */
600 #define elf_x86_64_hash_entry(ent) \
601 ((struct elf_x86_64_link_hash_entry *)(ent))
603 struct elf_x86_64_obj_tdata
605 struct elf_obj_tdata root;
607 /* tls_type for each local got entry. */
608 char *local_got_tls_type;
610 /* GOTPLT entries for TLS descriptors. */
611 bfd_vma *local_tlsdesc_gotent;
614 #define elf_x86_64_tdata(abfd) \
615 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
617 #define elf_x86_64_local_got_tls_type(abfd) \
618 (elf_x86_64_tdata (abfd)->local_got_tls_type)
620 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
621 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
623 #define is_x86_64_elf(bfd) \
624 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
625 && elf_tdata (bfd) != NULL \
626 && elf_object_id (bfd) == X86_64_ELF_DATA)
629 elf_x86_64_mkobject (bfd *abfd)
631 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
635 /* x86-64 ELF linker hash table. */
637 struct elf_x86_64_link_hash_table
639 struct elf_link_hash_table elf;
641 /* Short-cuts to get to dynamic linker sections. */
644 asection *plt_eh_frame;
648 bfd_signed_vma refcount;
652 /* The amount of space used by the jump slots in the GOT. */
653 bfd_vma sgotplt_jump_table_size;
655 /* Small local sym cache. */
656 struct sym_cache sym_cache;
658 bfd_vma (*r_info) (bfd_vma, bfd_vma);
659 bfd_vma (*r_sym) (bfd_vma);
660 unsigned int pointer_r_type;
661 const char *dynamic_interpreter;
662 int dynamic_interpreter_size;
664 /* _TLS_MODULE_BASE_ symbol. */
665 struct bfd_link_hash_entry *tls_module_base;
667 /* Used by local STT_GNU_IFUNC symbols. */
668 htab_t loc_hash_table;
669 void * loc_hash_memory;
671 /* The offset into splt of the PLT entry for the TLS descriptor
672 resolver. Special values are 0, if not necessary (or not found
673 to be necessary yet), and -1 if needed but not determined
676 /* The offset into sgot of the GOT entry used by the PLT entry
681 /* Get the x86-64 ELF linker hash table from a link_info structure. */
683 #define elf_x86_64_hash_table(p) \
684 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
685 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
687 #define elf_x86_64_compute_jump_table_size(htab) \
688 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
690 /* Create an entry in an x86-64 ELF linker hash table. */
692 static struct bfd_hash_entry *
693 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
694 struct bfd_hash_table *table,
697 /* Allocate the structure if it has not already been allocated by a
701 entry = (struct bfd_hash_entry *)
702 bfd_hash_allocate (table,
703 sizeof (struct elf_x86_64_link_hash_entry));
708 /* Call the allocation method of the superclass. */
709 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
712 struct elf_x86_64_link_hash_entry *eh;
714 eh = (struct elf_x86_64_link_hash_entry *) entry;
715 eh->dyn_relocs = NULL;
716 eh->tls_type = GOT_UNKNOWN;
717 eh->tlsdesc_got = (bfd_vma) -1;
723 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
724 for local symbol so that we can handle local STT_GNU_IFUNC symbols
725 as global symbol. We reuse indx and dynstr_index for local symbol
726 hash since they aren't used by global symbols in this backend. */
729 elf_x86_64_local_htab_hash (const void *ptr)
731 struct elf_link_hash_entry *h
732 = (struct elf_link_hash_entry *) ptr;
733 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
736 /* Compare local hash entries. */
739 elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
741 struct elf_link_hash_entry *h1
742 = (struct elf_link_hash_entry *) ptr1;
743 struct elf_link_hash_entry *h2
744 = (struct elf_link_hash_entry *) ptr2;
746 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
749 /* Find and/or create a hash entry for local symbol. */
751 static struct elf_link_hash_entry *
752 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
753 bfd *abfd, const Elf_Internal_Rela *rel,
756 struct elf_x86_64_link_hash_entry e, *ret;
757 asection *sec = abfd->sections;
758 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
759 htab->r_sym (rel->r_info));
762 e.elf.indx = sec->id;
763 e.elf.dynstr_index = htab->r_sym (rel->r_info);
764 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
765 create ? INSERT : NO_INSERT);
772 ret = (struct elf_x86_64_link_hash_entry *) *slot;
776 ret = (struct elf_x86_64_link_hash_entry *)
777 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
778 sizeof (struct elf_x86_64_link_hash_entry));
781 memset (ret, 0, sizeof (*ret));
782 ret->elf.indx = sec->id;
783 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
784 ret->elf.dynindx = -1;
790 /* Create an X86-64 ELF linker hash table. */
792 static struct bfd_link_hash_table *
793 elf_x86_64_link_hash_table_create (bfd *abfd)
795 struct elf_x86_64_link_hash_table *ret;
796 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
798 ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt);
802 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
803 elf_x86_64_link_hash_newfunc,
804 sizeof (struct elf_x86_64_link_hash_entry),
813 ret->sym_cache.abfd = NULL;
814 ret->tlsdesc_plt = 0;
815 ret->tlsdesc_got = 0;
816 ret->tls_ld_got.refcount = 0;
817 ret->sgotplt_jump_table_size = 0;
818 ret->tls_module_base = NULL;
822 ret->r_info = elf64_r_info;
823 ret->r_sym = elf64_r_sym;
824 ret->pointer_r_type = R_X86_64_64;
825 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
826 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
830 ret->r_info = elf32_r_info;
831 ret->r_sym = elf32_r_sym;
832 ret->pointer_r_type = R_X86_64_32;
833 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
834 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
837 ret->loc_hash_table = htab_try_create (1024,
838 elf_x86_64_local_htab_hash,
839 elf_x86_64_local_htab_eq,
841 ret->loc_hash_memory = objalloc_create ();
842 if (!ret->loc_hash_table || !ret->loc_hash_memory)
848 return &ret->elf.root;
851 /* Destroy an X86-64 ELF linker hash table. */
854 elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash)
856 struct elf_x86_64_link_hash_table *htab
857 = (struct elf_x86_64_link_hash_table *) hash;
859 if (htab->loc_hash_table)
860 htab_delete (htab->loc_hash_table);
861 if (htab->loc_hash_memory)
862 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
863 _bfd_generic_link_hash_table_free (hash);
866 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
867 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
871 elf_x86_64_create_dynamic_sections (bfd *dynobj,
872 struct bfd_link_info *info)
874 struct elf_x86_64_link_hash_table *htab;
876 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
879 htab = elf_x86_64_hash_table (info);
883 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
885 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
888 || (!info->shared && !htab->srelbss))
891 if (!info->no_ld_generated_unwind_info
892 && bfd_get_section_by_name (dynobj, ".eh_frame") == NULL
893 && htab->elf.splt != NULL)
895 flagword flags = get_elf_backend_data (dynobj)->dynamic_sec_flags;
897 = bfd_make_section_with_flags (dynobj, ".eh_frame",
898 flags | SEC_READONLY);
899 if (htab->plt_eh_frame == NULL
900 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
903 htab->plt_eh_frame->size = sizeof (elf_x86_64_eh_frame_plt);
904 htab->plt_eh_frame->contents
905 = bfd_alloc (dynobj, htab->plt_eh_frame->size);
906 memcpy (htab->plt_eh_frame->contents, elf_x86_64_eh_frame_plt,
907 sizeof (elf_x86_64_eh_frame_plt));
912 /* Copy the extra info we tack onto an elf_link_hash_entry. */
915 elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
916 struct elf_link_hash_entry *dir,
917 struct elf_link_hash_entry *ind)
919 struct elf_x86_64_link_hash_entry *edir, *eind;
921 edir = (struct elf_x86_64_link_hash_entry *) dir;
922 eind = (struct elf_x86_64_link_hash_entry *) ind;
924 if (eind->dyn_relocs != NULL)
926 if (edir->dyn_relocs != NULL)
928 struct elf_dyn_relocs **pp;
929 struct elf_dyn_relocs *p;
931 /* Add reloc counts against the indirect sym to the direct sym
932 list. Merge any entries against the same section. */
933 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
935 struct elf_dyn_relocs *q;
937 for (q = edir->dyn_relocs; q != NULL; q = q->next)
938 if (q->sec == p->sec)
940 q->pc_count += p->pc_count;
941 q->count += p->count;
948 *pp = edir->dyn_relocs;
951 edir->dyn_relocs = eind->dyn_relocs;
952 eind->dyn_relocs = NULL;
955 if (ind->root.type == bfd_link_hash_indirect
956 && dir->got.refcount <= 0)
958 edir->tls_type = eind->tls_type;
959 eind->tls_type = GOT_UNKNOWN;
962 if (ELIMINATE_COPY_RELOCS
963 && ind->root.type != bfd_link_hash_indirect
964 && dir->dynamic_adjusted)
966 /* If called to transfer flags for a weakdef during processing
967 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
968 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
969 dir->ref_dynamic |= ind->ref_dynamic;
970 dir->ref_regular |= ind->ref_regular;
971 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
972 dir->needs_plt |= ind->needs_plt;
973 dir->pointer_equality_needed |= ind->pointer_equality_needed;
976 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
980 elf64_x86_64_elf_object_p (bfd *abfd)
982 /* Set the right machine number for an x86-64 elf64 file. */
983 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
1001 /* Return TRUE if the TLS access code sequence support transition
1005 elf_x86_64_check_tls_transition (bfd *abfd,
1006 struct bfd_link_info *info,
1009 Elf_Internal_Shdr *symtab_hdr,
1010 struct elf_link_hash_entry **sym_hashes,
1011 unsigned int r_type,
1012 const Elf_Internal_Rela *rel,
1013 const Elf_Internal_Rela *relend)
1016 unsigned long r_symndx;
1017 struct elf_link_hash_entry *h;
1019 struct elf_x86_64_link_hash_table *htab;
1021 /* Get the section contents. */
1022 if (contents == NULL)
1024 if (elf_section_data (sec)->this_hdr.contents != NULL)
1025 contents = elf_section_data (sec)->this_hdr.contents;
1028 /* FIXME: How to better handle error condition? */
1029 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1032 /* Cache the section contents for elf_link_input_bfd. */
1033 elf_section_data (sec)->this_hdr.contents = contents;
1037 htab = elf_x86_64_hash_table (info);
1038 offset = rel->r_offset;
1041 case R_X86_64_TLSGD:
1042 case R_X86_64_TLSLD:
1043 if ((rel + 1) >= relend)
1046 if (r_type == R_X86_64_TLSGD)
1048 /* Check transition from GD access model. For 64bit, only
1049 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1050 .word 0x6666; rex64; call __tls_get_addr
1051 can transit to different access model. For 32bit, only
1052 leaq foo@tlsgd(%rip), %rdi
1053 .word 0x6666; rex64; call __tls_get_addr
1054 can transit to different access model. */
1056 static x86_64_opcode32 call = { { 0x66, 0x66, 0x48, 0xe8 } };
1057 if ((offset + 12) > sec->size
1058 || bfd_get_32 (abfd, contents + offset + 4) != call.i)
1061 if (ABI_64_P (abfd))
1063 static x86_64_opcode32 leaq = { { 0x66, 0x48, 0x8d, 0x3d } };
1065 || bfd_get_32 (abfd, contents + offset - 4) != leaq.i)
1070 static x86_64_opcode16 lea = { { 0x8d, 0x3d } };
1072 || bfd_get_8 (abfd, contents + offset - 3) != 0x48
1073 || bfd_get_16 (abfd, contents + offset - 2) != lea.i)
1079 /* Check transition from LD access model. Only
1080 leaq foo@tlsld(%rip), %rdi;
1082 can transit to different access model. */
1084 static x86_64_opcode32 ld = { { 0x48, 0x8d, 0x3d, 0xe8 } };
1087 if (offset < 3 || (offset + 9) > sec->size)
1090 op.i = bfd_get_32 (abfd, contents + offset - 3);
1091 op.c[3] = bfd_get_8 (abfd, contents + offset + 4);
1096 r_symndx = htab->r_sym (rel[1].r_info);
1097 if (r_symndx < symtab_hdr->sh_info)
1100 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1101 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1102 may be versioned. */
1104 && h->root.root.string != NULL
1105 && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1106 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)
1107 && (strncmp (h->root.root.string,
1108 "__tls_get_addr", 14) == 0));
1110 case R_X86_64_GOTTPOFF:
1111 /* Check transition from IE access model:
1112 mov foo@gottpoff(%rip), %reg
1113 add foo@gottpoff(%rip), %reg
1116 /* Check REX prefix first. */
1117 if (offset >= 3 && (offset + 4) <= sec->size)
1119 val = bfd_get_8 (abfd, contents + offset - 3);
1120 if (val != 0x48 && val != 0x4c)
1122 /* X32 may have 0x44 REX prefix or no REX prefix. */
1123 if (ABI_64_P (abfd))
1129 /* X32 may not have any REX prefix. */
1130 if (ABI_64_P (abfd))
1132 if (offset < 2 || (offset + 3) > sec->size)
1136 val = bfd_get_8 (abfd, contents + offset - 2);
1137 if (val != 0x8b && val != 0x03)
1140 val = bfd_get_8 (abfd, contents + offset - 1);
1141 return (val & 0xc7) == 5;
1143 case R_X86_64_GOTPC32_TLSDESC:
1144 /* Check transition from GDesc access model:
1145 leaq x@tlsdesc(%rip), %rax
1147 Make sure it's a leaq adding rip to a 32-bit offset
1148 into any register, although it's probably almost always
1151 if (offset < 3 || (offset + 4) > sec->size)
1154 val = bfd_get_8 (abfd, contents + offset - 3);
1155 if ((val & 0xfb) != 0x48)
1158 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1161 val = bfd_get_8 (abfd, contents + offset - 1);
1162 return (val & 0xc7) == 0x05;
1164 case R_X86_64_TLSDESC_CALL:
1165 /* Check transition from GDesc access model:
1166 call *x@tlsdesc(%rax)
1168 if (offset + 2 <= sec->size)
1170 /* Make sure that it's a call *x@tlsdesc(%rax). */
1171 static x86_64_opcode16 call = { { 0xff, 0x10 } };
1172 return bfd_get_16 (abfd, contents + offset) == call.i;
1182 /* Return TRUE if the TLS access transition is OK or no transition
1183 will be performed. Update R_TYPE if there is a transition. */
1186 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1187 asection *sec, bfd_byte *contents,
1188 Elf_Internal_Shdr *symtab_hdr,
1189 struct elf_link_hash_entry **sym_hashes,
1190 unsigned int *r_type, int tls_type,
1191 const Elf_Internal_Rela *rel,
1192 const Elf_Internal_Rela *relend,
1193 struct elf_link_hash_entry *h,
1194 unsigned long r_symndx)
1196 unsigned int from_type = *r_type;
1197 unsigned int to_type = from_type;
1198 bfd_boolean check = TRUE;
1200 /* Skip TLS transition for functions. */
1202 && (h->type == STT_FUNC
1203 || h->type == STT_GNU_IFUNC))
1208 case R_X86_64_TLSGD:
1209 case R_X86_64_GOTPC32_TLSDESC:
1210 case R_X86_64_TLSDESC_CALL:
1211 case R_X86_64_GOTTPOFF:
1212 if (info->executable)
1215 to_type = R_X86_64_TPOFF32;
1217 to_type = R_X86_64_GOTTPOFF;
1220 /* When we are called from elf_x86_64_relocate_section,
1221 CONTENTS isn't NULL and there may be additional transitions
1222 based on TLS_TYPE. */
1223 if (contents != NULL)
1225 unsigned int new_to_type = to_type;
1227 if (info->executable
1230 && tls_type == GOT_TLS_IE)
1231 new_to_type = R_X86_64_TPOFF32;
1233 if (to_type == R_X86_64_TLSGD
1234 || to_type == R_X86_64_GOTPC32_TLSDESC
1235 || to_type == R_X86_64_TLSDESC_CALL)
1237 if (tls_type == GOT_TLS_IE)
1238 new_to_type = R_X86_64_GOTTPOFF;
1241 /* We checked the transition before when we were called from
1242 elf_x86_64_check_relocs. We only want to check the new
1243 transition which hasn't been checked before. */
1244 check = new_to_type != to_type && from_type == to_type;
1245 to_type = new_to_type;
1250 case R_X86_64_TLSLD:
1251 if (info->executable)
1252 to_type = R_X86_64_TPOFF32;
1259 /* Return TRUE if there is no transition. */
1260 if (from_type == to_type)
1263 /* Check if the transition can be performed. */
1265 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1266 symtab_hdr, sym_hashes,
1267 from_type, rel, relend))
1269 reloc_howto_type *from, *to;
1272 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1273 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1276 name = h->root.root.string;
1279 struct elf_x86_64_link_hash_table *htab;
1281 htab = elf_x86_64_hash_table (info);
1286 Elf_Internal_Sym *isym;
1288 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1290 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1294 (*_bfd_error_handler)
1295 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1296 "in section `%A' failed"),
1297 abfd, sec, from->name, to->name, name,
1298 (unsigned long) rel->r_offset);
1299 bfd_set_error (bfd_error_bad_value);
1307 /* Look through the relocs for a section during the first phase, and
1308 calculate needed space in the global offset table, procedure
1309 linkage table, and dynamic reloc sections. */
1312 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1314 const Elf_Internal_Rela *relocs)
1316 struct elf_x86_64_link_hash_table *htab;
1317 Elf_Internal_Shdr *symtab_hdr;
1318 struct elf_link_hash_entry **sym_hashes;
1319 const Elf_Internal_Rela *rel;
1320 const Elf_Internal_Rela *rel_end;
1323 if (info->relocatable)
1326 BFD_ASSERT (is_x86_64_elf (abfd));
1328 htab = elf_x86_64_hash_table (info);
1332 symtab_hdr = &elf_symtab_hdr (abfd);
1333 sym_hashes = elf_sym_hashes (abfd);
1337 rel_end = relocs + sec->reloc_count;
1338 for (rel = relocs; rel < rel_end; rel++)
1340 unsigned int r_type;
1341 unsigned long r_symndx;
1342 struct elf_link_hash_entry *h;
1343 Elf_Internal_Sym *isym;
1346 r_symndx = htab->r_sym (rel->r_info);
1347 r_type = ELF32_R_TYPE (rel->r_info);
1349 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1351 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1356 if (r_symndx < symtab_hdr->sh_info)
1358 /* A local symbol. */
1359 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1364 /* Check relocation against local STT_GNU_IFUNC symbol. */
1365 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1367 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1372 /* Fake a STT_GNU_IFUNC symbol. */
1373 h->type = STT_GNU_IFUNC;
1376 h->forced_local = 1;
1377 h->root.type = bfd_link_hash_defined;
1385 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1386 while (h->root.type == bfd_link_hash_indirect
1387 || h->root.type == bfd_link_hash_warning)
1388 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1391 /* Check invalid x32 relocations. */
1392 if (!ABI_64_P (abfd))
1399 /* Allow R_X86_64_64 relocations in SEC_DEBUGGING sections
1400 when building shared libraries. */
1402 && !info->executable
1403 && (sec->flags & SEC_DEBUGGING) != 0)
1406 case R_X86_64_DTPOFF64:
1407 case R_X86_64_TPOFF64:
1409 case R_X86_64_GOTOFF64:
1410 case R_X86_64_GOT64:
1411 case R_X86_64_GOTPCREL64:
1412 case R_X86_64_GOTPC64:
1413 case R_X86_64_GOTPLT64:
1414 case R_X86_64_PLTOFF64:
1417 name = h->root.root.string;
1419 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1421 (*_bfd_error_handler)
1422 (_("%B: relocation %s against symbol `%s' isn't "
1423 "supported in x32 mode"), abfd,
1424 x86_64_elf_howto_table[r_type].name, name);
1425 bfd_set_error (bfd_error_bad_value);
1433 /* Create the ifunc sections for static executables. If we
1434 never see an indirect function symbol nor we are building
1435 a static executable, those sections will be empty and
1436 won't appear in output. */
1447 case R_X86_64_PLT32:
1448 case R_X86_64_GOTPCREL:
1449 case R_X86_64_GOTPCREL64:
1450 if (htab->elf.dynobj == NULL)
1451 htab->elf.dynobj = abfd;
1452 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1457 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1458 it here if it is defined in a non-shared object. */
1459 if (h->type == STT_GNU_IFUNC
1462 /* It is referenced by a non-shared object. */
1466 /* STT_GNU_IFUNC symbol must go through PLT. */
1467 h->plt.refcount += 1;
1469 /* STT_GNU_IFUNC needs dynamic sections. */
1470 if (htab->elf.dynobj == NULL)
1471 htab->elf.dynobj = abfd;
1476 if (h->root.root.string)
1477 name = h->root.root.string;
1479 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1481 (*_bfd_error_handler)
1482 (_("%B: relocation %s against STT_GNU_IFUNC "
1483 "symbol `%s' isn't handled by %s"), abfd,
1484 x86_64_elf_howto_table[r_type].name,
1485 name, __FUNCTION__);
1486 bfd_set_error (bfd_error_bad_value);
1490 if (ABI_64_P (abfd))
1494 h->pointer_equality_needed = 1;
1497 /* We must copy these reloc types into the output
1498 file. Create a reloc section in dynobj and
1499 make room for this reloc. */
1500 sreloc = _bfd_elf_create_ifunc_dyn_reloc
1501 (abfd, info, sec, sreloc,
1502 &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs);
1513 if (r_type != R_X86_64_PC32
1514 && r_type != R_X86_64_PC64)
1515 h->pointer_equality_needed = 1;
1518 case R_X86_64_PLT32:
1521 case R_X86_64_GOTPCREL:
1522 case R_X86_64_GOTPCREL64:
1523 h->got.refcount += 1;
1524 if (htab->elf.sgot == NULL
1525 && !_bfd_elf_create_got_section (htab->elf.dynobj,
1535 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1536 symtab_hdr, sym_hashes,
1537 &r_type, GOT_UNKNOWN,
1538 rel, rel_end, h, r_symndx))
1543 case R_X86_64_TLSLD:
1544 htab->tls_ld_got.refcount += 1;
1547 case R_X86_64_TPOFF32:
1548 if (!info->executable && ABI_64_P (abfd))
1551 name = h->root.root.string;
1553 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1555 (*_bfd_error_handler)
1556 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1558 x86_64_elf_howto_table[r_type].name, name);
1559 bfd_set_error (bfd_error_bad_value);
1564 case R_X86_64_GOTTPOFF:
1565 if (!info->executable)
1566 info->flags |= DF_STATIC_TLS;
1569 case R_X86_64_GOT32:
1570 case R_X86_64_GOTPCREL:
1571 case R_X86_64_TLSGD:
1572 case R_X86_64_GOT64:
1573 case R_X86_64_GOTPCREL64:
1574 case R_X86_64_GOTPLT64:
1575 case R_X86_64_GOTPC32_TLSDESC:
1576 case R_X86_64_TLSDESC_CALL:
1577 /* This symbol requires a global offset table entry. */
1579 int tls_type, old_tls_type;
1583 default: tls_type = GOT_NORMAL; break;
1584 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1585 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
1586 case R_X86_64_GOTPC32_TLSDESC:
1587 case R_X86_64_TLSDESC_CALL:
1588 tls_type = GOT_TLS_GDESC; break;
1593 if (r_type == R_X86_64_GOTPLT64)
1595 /* This relocation indicates that we also need
1596 a PLT entry, as this is a function. We don't need
1597 a PLT entry for local symbols. */
1599 h->plt.refcount += 1;
1601 h->got.refcount += 1;
1602 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
1606 bfd_signed_vma *local_got_refcounts;
1608 /* This is a global offset table entry for a local symbol. */
1609 local_got_refcounts = elf_local_got_refcounts (abfd);
1610 if (local_got_refcounts == NULL)
1614 size = symtab_hdr->sh_info;
1615 size *= sizeof (bfd_signed_vma)
1616 + sizeof (bfd_vma) + sizeof (char);
1617 local_got_refcounts = ((bfd_signed_vma *)
1618 bfd_zalloc (abfd, size));
1619 if (local_got_refcounts == NULL)
1621 elf_local_got_refcounts (abfd) = local_got_refcounts;
1622 elf_x86_64_local_tlsdesc_gotent (abfd)
1623 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1624 elf_x86_64_local_got_tls_type (abfd)
1625 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1627 local_got_refcounts[r_symndx] += 1;
1629 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
1632 /* If a TLS symbol is accessed using IE at least once,
1633 there is no point to use dynamic model for it. */
1634 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1635 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1636 || tls_type != GOT_TLS_IE))
1638 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
1639 tls_type = old_tls_type;
1640 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1641 && GOT_TLS_GD_ANY_P (tls_type))
1642 tls_type |= old_tls_type;
1646 name = h->root.root.string;
1648 name = bfd_elf_sym_name (abfd, symtab_hdr,
1650 (*_bfd_error_handler)
1651 (_("%B: '%s' accessed both as normal and thread local symbol"),
1657 if (old_tls_type != tls_type)
1660 elf_x86_64_hash_entry (h)->tls_type = tls_type;
1662 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
1667 case R_X86_64_GOTOFF64:
1668 case R_X86_64_GOTPC32:
1669 case R_X86_64_GOTPC64:
1671 if (htab->elf.sgot == NULL)
1673 if (htab->elf.dynobj == NULL)
1674 htab->elf.dynobj = abfd;
1675 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1681 case R_X86_64_PLT32:
1682 /* This symbol requires a procedure linkage table entry. We
1683 actually build the entry in adjust_dynamic_symbol,
1684 because this might be a case of linking PIC code which is
1685 never referenced by a dynamic object, in which case we
1686 don't need to generate a procedure linkage table entry
1689 /* If this is a local symbol, we resolve it directly without
1690 creating a procedure linkage table entry. */
1695 h->plt.refcount += 1;
1698 case R_X86_64_PLTOFF64:
1699 /* This tries to form the 'address' of a function relative
1700 to GOT. For global symbols we need a PLT entry. */
1704 h->plt.refcount += 1;
1709 if (!ABI_64_P (abfd))
1714 /* Let's help debug shared library creation. These relocs
1715 cannot be used in shared libs. Don't error out for
1716 sections we don't care about, such as debug sections or
1717 non-constant sections. */
1719 && (sec->flags & SEC_ALLOC) != 0
1720 && (sec->flags & SEC_READONLY) != 0)
1723 name = h->root.root.string;
1725 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1726 (*_bfd_error_handler)
1727 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1728 abfd, x86_64_elf_howto_table[r_type].name, name);
1729 bfd_set_error (bfd_error_bad_value);
1740 if (h != NULL && info->executable)
1742 /* If this reloc is in a read-only section, we might
1743 need a copy reloc. We can't check reliably at this
1744 stage whether the section is read-only, as input
1745 sections have not yet been mapped to output sections.
1746 Tentatively set the flag for now, and correct in
1747 adjust_dynamic_symbol. */
1750 /* We may need a .plt entry if the function this reloc
1751 refers to is in a shared lib. */
1752 h->plt.refcount += 1;
1753 if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64)
1754 h->pointer_equality_needed = 1;
1757 /* If we are creating a shared library, and this is a reloc
1758 against a global symbol, or a non PC relative reloc
1759 against a local symbol, then we need to copy the reloc
1760 into the shared library. However, if we are linking with
1761 -Bsymbolic, we do not need to copy a reloc against a
1762 global symbol which is defined in an object we are
1763 including in the link (i.e., DEF_REGULAR is set). At
1764 this point we have not seen all the input files, so it is
1765 possible that DEF_REGULAR is not set now but will be set
1766 later (it is never cleared). In case of a weak definition,
1767 DEF_REGULAR may be cleared later by a strong definition in
1768 a shared library. We account for that possibility below by
1769 storing information in the relocs_copied field of the hash
1770 table entry. A similar situation occurs when creating
1771 shared libraries and symbol visibility changes render the
1774 If on the other hand, we are creating an executable, we
1775 may need to keep relocations for symbols satisfied by a
1776 dynamic library if we manage to avoid copy relocs for the
1779 && (sec->flags & SEC_ALLOC) != 0
1780 && (! IS_X86_64_PCREL_TYPE (r_type)
1782 && (! SYMBOLIC_BIND (info, h)
1783 || h->root.type == bfd_link_hash_defweak
1784 || !h->def_regular))))
1785 || (ELIMINATE_COPY_RELOCS
1787 && (sec->flags & SEC_ALLOC) != 0
1789 && (h->root.type == bfd_link_hash_defweak
1790 || !h->def_regular)))
1792 struct elf_dyn_relocs *p;
1793 struct elf_dyn_relocs **head;
1795 /* We must copy these reloc types into the output file.
1796 Create a reloc section in dynobj and make room for
1800 if (htab->elf.dynobj == NULL)
1801 htab->elf.dynobj = abfd;
1803 sreloc = _bfd_elf_make_dynamic_reloc_section
1804 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
1805 abfd, /*rela?*/ TRUE);
1811 /* If this is a global symbol, we count the number of
1812 relocations we need for this symbol. */
1815 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
1819 /* Track dynamic relocs needed for local syms too.
1820 We really need local syms available to do this
1825 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1830 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1834 /* Beware of type punned pointers vs strict aliasing
1836 vpp = &(elf_section_data (s)->local_dynrel);
1837 head = (struct elf_dyn_relocs **)vpp;
1841 if (p == NULL || p->sec != sec)
1843 bfd_size_type amt = sizeof *p;
1845 p = ((struct elf_dyn_relocs *)
1846 bfd_alloc (htab->elf.dynobj, amt));
1857 if (IS_X86_64_PCREL_TYPE (r_type))
1862 /* This relocation describes the C++ object vtable hierarchy.
1863 Reconstruct it for later use during GC. */
1864 case R_X86_64_GNU_VTINHERIT:
1865 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1869 /* This relocation describes which C++ vtable entries are actually
1870 used. Record for later use during GC. */
1871 case R_X86_64_GNU_VTENTRY:
1872 BFD_ASSERT (h != NULL);
1874 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1886 /* Return the section that should be marked against GC for a given
1890 elf_x86_64_gc_mark_hook (asection *sec,
1891 struct bfd_link_info *info,
1892 Elf_Internal_Rela *rel,
1893 struct elf_link_hash_entry *h,
1894 Elf_Internal_Sym *sym)
1897 switch (ELF32_R_TYPE (rel->r_info))
1899 case R_X86_64_GNU_VTINHERIT:
1900 case R_X86_64_GNU_VTENTRY:
1904 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1907 /* Update the got entry reference counts for the section being removed. */
1910 elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
1912 const Elf_Internal_Rela *relocs)
1914 struct elf_x86_64_link_hash_table *htab;
1915 Elf_Internal_Shdr *symtab_hdr;
1916 struct elf_link_hash_entry **sym_hashes;
1917 bfd_signed_vma *local_got_refcounts;
1918 const Elf_Internal_Rela *rel, *relend;
1920 if (info->relocatable)
1923 htab = elf_x86_64_hash_table (info);
1927 elf_section_data (sec)->local_dynrel = NULL;
1929 symtab_hdr = &elf_symtab_hdr (abfd);
1930 sym_hashes = elf_sym_hashes (abfd);
1931 local_got_refcounts = elf_local_got_refcounts (abfd);
1933 htab = elf_x86_64_hash_table (info);
1934 relend = relocs + sec->reloc_count;
1935 for (rel = relocs; rel < relend; rel++)
1937 unsigned long r_symndx;
1938 unsigned int r_type;
1939 struct elf_link_hash_entry *h = NULL;
1941 r_symndx = htab->r_sym (rel->r_info);
1942 if (r_symndx >= symtab_hdr->sh_info)
1944 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1945 while (h->root.type == bfd_link_hash_indirect
1946 || h->root.type == bfd_link_hash_warning)
1947 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1951 /* A local symbol. */
1952 Elf_Internal_Sym *isym;
1954 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1957 /* Check relocation against local STT_GNU_IFUNC symbol. */
1959 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1961 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
1969 struct elf_x86_64_link_hash_entry *eh;
1970 struct elf_dyn_relocs **pp;
1971 struct elf_dyn_relocs *p;
1973 eh = (struct elf_x86_64_link_hash_entry *) h;
1975 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1978 /* Everything must go for SEC. */
1984 r_type = ELF32_R_TYPE (rel->r_info);
1985 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1986 symtab_hdr, sym_hashes,
1987 &r_type, GOT_UNKNOWN,
1988 rel, relend, h, r_symndx))
1993 case R_X86_64_TLSLD:
1994 if (htab->tls_ld_got.refcount > 0)
1995 htab->tls_ld_got.refcount -= 1;
1998 case R_X86_64_TLSGD:
1999 case R_X86_64_GOTPC32_TLSDESC:
2000 case R_X86_64_TLSDESC_CALL:
2001 case R_X86_64_GOTTPOFF:
2002 case R_X86_64_GOT32:
2003 case R_X86_64_GOTPCREL:
2004 case R_X86_64_GOT64:
2005 case R_X86_64_GOTPCREL64:
2006 case R_X86_64_GOTPLT64:
2009 if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0)
2010 h->plt.refcount -= 1;
2011 if (h->got.refcount > 0)
2012 h->got.refcount -= 1;
2013 if (h->type == STT_GNU_IFUNC)
2015 if (h->plt.refcount > 0)
2016 h->plt.refcount -= 1;
2019 else if (local_got_refcounts != NULL)
2021 if (local_got_refcounts[r_symndx] > 0)
2022 local_got_refcounts[r_symndx] -= 1;
2036 && (h == NULL || h->type != STT_GNU_IFUNC))
2040 case R_X86_64_PLT32:
2041 case R_X86_64_PLTOFF64:
2044 if (h->plt.refcount > 0)
2045 h->plt.refcount -= 1;
2057 /* Adjust a symbol defined by a dynamic object and referenced by a
2058 regular object. The current definition is in some section of the
2059 dynamic object, but we're not including those sections. We have to
2060 change the definition to something the rest of the link can
2064 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2065 struct elf_link_hash_entry *h)
2067 struct elf_x86_64_link_hash_table *htab;
2070 /* STT_GNU_IFUNC symbol must go through PLT. */
2071 if (h->type == STT_GNU_IFUNC)
2073 if (h->plt.refcount <= 0)
2075 h->plt.offset = (bfd_vma) -1;
2081 /* If this is a function, put it in the procedure linkage table. We
2082 will fill in the contents of the procedure linkage table later,
2083 when we know the address of the .got section. */
2084 if (h->type == STT_FUNC
2087 if (h->plt.refcount <= 0
2088 || SYMBOL_CALLS_LOCAL (info, h)
2089 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2090 && h->root.type == bfd_link_hash_undefweak))
2092 /* This case can occur if we saw a PLT32 reloc in an input
2093 file, but the symbol was never referred to by a dynamic
2094 object, or if all references were garbage collected. In
2095 such a case, we don't actually need to build a procedure
2096 linkage table, and we can just do a PC32 reloc instead. */
2097 h->plt.offset = (bfd_vma) -1;
2104 /* It's possible that we incorrectly decided a .plt reloc was
2105 needed for an R_X86_64_PC32 reloc to a non-function sym in
2106 check_relocs. We can't decide accurately between function and
2107 non-function syms in check-relocs; Objects loaded later in
2108 the link may change h->type. So fix it now. */
2109 h->plt.offset = (bfd_vma) -1;
2111 /* If this is a weak symbol, and there is a real definition, the
2112 processor independent code will have arranged for us to see the
2113 real definition first, and we can just use the same value. */
2114 if (h->u.weakdef != NULL)
2116 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2117 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2118 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2119 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2120 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2121 h->non_got_ref = h->u.weakdef->non_got_ref;
2125 /* This is a reference to a symbol defined by a dynamic object which
2126 is not a function. */
2128 /* If we are creating a shared library, we must presume that the
2129 only references to the symbol are via the global offset table.
2130 For such cases we need not do anything here; the relocations will
2131 be handled correctly by relocate_section. */
2135 /* If there are no references to this symbol that do not use the
2136 GOT, we don't need to generate a copy reloc. */
2137 if (!h->non_got_ref)
2140 /* If -z nocopyreloc was given, we won't generate them either. */
2141 if (info->nocopyreloc)
2147 if (ELIMINATE_COPY_RELOCS)
2149 struct elf_x86_64_link_hash_entry * eh;
2150 struct elf_dyn_relocs *p;
2152 eh = (struct elf_x86_64_link_hash_entry *) h;
2153 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2155 s = p->sec->output_section;
2156 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2160 /* If we didn't find any dynamic relocs in read-only sections, then
2161 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2171 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2172 h->root.root.string);
2176 /* We must allocate the symbol in our .dynbss section, which will
2177 become part of the .bss section of the executable. There will be
2178 an entry for this symbol in the .dynsym section. The dynamic
2179 object will contain position independent code, so all references
2180 from the dynamic object to this symbol will go through the global
2181 offset table. The dynamic linker will use the .dynsym entry to
2182 determine the address it must put in the global offset table, so
2183 both the dynamic object and the regular object will refer to the
2184 same memory location for the variable. */
2186 htab = elf_x86_64_hash_table (info);
2190 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2191 to copy the initial value out of the dynamic object and into the
2192 runtime process image. */
2193 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2195 const struct elf_backend_data *bed;
2196 bed = get_elf_backend_data (info->output_bfd);
2197 htab->srelbss->size += bed->s->sizeof_rela;
2203 return _bfd_elf_adjust_dynamic_copy (h, s);
2206 /* Allocate space in .plt, .got and associated reloc sections for
2210 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2212 struct bfd_link_info *info;
2213 struct elf_x86_64_link_hash_table *htab;
2214 struct elf_x86_64_link_hash_entry *eh;
2215 struct elf_dyn_relocs *p;
2216 const struct elf_backend_data *bed;
2218 if (h->root.type == bfd_link_hash_indirect)
2221 eh = (struct elf_x86_64_link_hash_entry *) h;
2223 info = (struct bfd_link_info *) inf;
2224 htab = elf_x86_64_hash_table (info);
2227 bed = get_elf_backend_data (info->output_bfd);
2229 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2230 here if it is defined and referenced in a non-shared object. */
2231 if (h->type == STT_GNU_IFUNC
2233 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2237 else if (htab->elf.dynamic_sections_created
2238 && h->plt.refcount > 0)
2240 /* Make sure this symbol is output as a dynamic symbol.
2241 Undefined weak syms won't yet be marked as dynamic. */
2242 if (h->dynindx == -1
2243 && !h->forced_local)
2245 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2250 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2252 asection *s = htab->elf.splt;
2254 /* If this is the first .plt entry, make room for the special
2257 s->size += PLT_ENTRY_SIZE;
2259 h->plt.offset = s->size;
2261 /* If this symbol is not defined in a regular file, and we are
2262 not generating a shared library, then set the symbol to this
2263 location in the .plt. This is required to make function
2264 pointers compare as equal between the normal executable and
2265 the shared library. */
2269 h->root.u.def.section = s;
2270 h->root.u.def.value = h->plt.offset;
2273 /* Make room for this entry. */
2274 s->size += PLT_ENTRY_SIZE;
2276 /* We also need to make an entry in the .got.plt section, which
2277 will be placed in the .got section by the linker script. */
2278 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
2280 /* We also need to make an entry in the .rela.plt section. */
2281 htab->elf.srelplt->size += bed->s->sizeof_rela;
2282 htab->elf.srelplt->reloc_count++;
2286 h->plt.offset = (bfd_vma) -1;
2292 h->plt.offset = (bfd_vma) -1;
2296 eh->tlsdesc_got = (bfd_vma) -1;
2298 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2299 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2300 if (h->got.refcount > 0
2303 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
2305 h->got.offset = (bfd_vma) -1;
2307 else if (h->got.refcount > 0)
2311 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
2313 /* Make sure this symbol is output as a dynamic symbol.
2314 Undefined weak syms won't yet be marked as dynamic. */
2315 if (h->dynindx == -1
2316 && !h->forced_local)
2318 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2322 if (GOT_TLS_GDESC_P (tls_type))
2324 eh->tlsdesc_got = htab->elf.sgotplt->size
2325 - elf_x86_64_compute_jump_table_size (htab);
2326 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2327 h->got.offset = (bfd_vma) -2;
2329 if (! GOT_TLS_GDESC_P (tls_type)
2330 || GOT_TLS_GD_P (tls_type))
2333 h->got.offset = s->size;
2334 s->size += GOT_ENTRY_SIZE;
2335 if (GOT_TLS_GD_P (tls_type))
2336 s->size += GOT_ENTRY_SIZE;
2338 dyn = htab->elf.dynamic_sections_created;
2339 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2341 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2342 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2343 || tls_type == GOT_TLS_IE)
2344 htab->elf.srelgot->size += bed->s->sizeof_rela;
2345 else if (GOT_TLS_GD_P (tls_type))
2346 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
2347 else if (! GOT_TLS_GDESC_P (tls_type)
2348 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2349 || h->root.type != bfd_link_hash_undefweak)
2351 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2352 htab->elf.srelgot->size += bed->s->sizeof_rela;
2353 if (GOT_TLS_GDESC_P (tls_type))
2355 htab->elf.srelplt->size += bed->s->sizeof_rela;
2356 htab->tlsdesc_plt = (bfd_vma) -1;
2360 h->got.offset = (bfd_vma) -1;
2362 if (eh->dyn_relocs == NULL)
2365 /* In the shared -Bsymbolic case, discard space allocated for
2366 dynamic pc-relative relocs against symbols which turn out to be
2367 defined in regular objects. For the normal shared case, discard
2368 space for pc-relative relocs that have become local due to symbol
2369 visibility changes. */
2373 /* Relocs that use pc_count are those that appear on a call
2374 insn, or certain REL relocs that can generated via assembly.
2375 We want calls to protected symbols to resolve directly to the
2376 function rather than going via the plt. If people want
2377 function pointer comparisons to work as expected then they
2378 should avoid writing weird assembly. */
2379 if (SYMBOL_CALLS_LOCAL (info, h))
2381 struct elf_dyn_relocs **pp;
2383 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2385 p->count -= p->pc_count;
2394 /* Also discard relocs on undefined weak syms with non-default
2396 if (eh->dyn_relocs != NULL
2397 && h->root.type == bfd_link_hash_undefweak)
2399 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2400 eh->dyn_relocs = NULL;
2402 /* Make sure undefined weak symbols are output as a dynamic
2404 else if (h->dynindx == -1
2405 && ! h->forced_local
2406 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2411 else if (ELIMINATE_COPY_RELOCS)
2413 /* For the non-shared case, discard space for relocs against
2414 symbols which turn out to need copy relocs or are not
2420 || (htab->elf.dynamic_sections_created
2421 && (h->root.type == bfd_link_hash_undefweak
2422 || h->root.type == bfd_link_hash_undefined))))
2424 /* Make sure this symbol is output as a dynamic symbol.
2425 Undefined weak syms won't yet be marked as dynamic. */
2426 if (h->dynindx == -1
2427 && ! h->forced_local
2428 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2431 /* If that succeeded, we know we'll be keeping all the
2433 if (h->dynindx != -1)
2437 eh->dyn_relocs = NULL;
2442 /* Finally, allocate space. */
2443 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2447 sreloc = elf_section_data (p->sec)->sreloc;
2449 BFD_ASSERT (sreloc != NULL);
2451 sreloc->size += p->count * bed->s->sizeof_rela;
2457 /* Allocate space in .plt, .got and associated reloc sections for
2458 local dynamic relocs. */
2461 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
2463 struct elf_link_hash_entry *h
2464 = (struct elf_link_hash_entry *) *slot;
2466 if (h->type != STT_GNU_IFUNC
2470 || h->root.type != bfd_link_hash_defined)
2473 return elf_x86_64_allocate_dynrelocs (h, inf);
2476 /* Find any dynamic relocs that apply to read-only sections. */
2479 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2482 struct elf_x86_64_link_hash_entry *eh;
2483 struct elf_dyn_relocs *p;
2485 /* Skip local IFUNC symbols. */
2486 if (h->forced_local && h->type == STT_GNU_IFUNC)
2489 eh = (struct elf_x86_64_link_hash_entry *) h;
2490 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2492 asection *s = p->sec->output_section;
2494 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2496 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2498 info->flags |= DF_TEXTREL;
2500 if (info->warn_shared_textrel && info->shared)
2501 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2502 p->sec->owner, h->root.root.string,
2505 /* Not an error, just cut short the traversal. */
2512 /* Set the sizes of the dynamic sections. */
2515 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2516 struct bfd_link_info *info)
2518 struct elf_x86_64_link_hash_table *htab;
2523 const struct elf_backend_data *bed;
2525 htab = elf_x86_64_hash_table (info);
2528 bed = get_elf_backend_data (output_bfd);
2530 dynobj = htab->elf.dynobj;
2534 if (htab->elf.dynamic_sections_created)
2536 /* Set the contents of the .interp section to the interpreter. */
2537 if (info->executable)
2539 s = bfd_get_section_by_name (dynobj, ".interp");
2542 s->size = htab->dynamic_interpreter_size;
2543 s->contents = (unsigned char *) htab->dynamic_interpreter;
2547 /* Set up .got offsets for local syms, and space for local dynamic
2549 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2551 bfd_signed_vma *local_got;
2552 bfd_signed_vma *end_local_got;
2553 char *local_tls_type;
2554 bfd_vma *local_tlsdesc_gotent;
2555 bfd_size_type locsymcount;
2556 Elf_Internal_Shdr *symtab_hdr;
2559 if (! is_x86_64_elf (ibfd))
2562 for (s = ibfd->sections; s != NULL; s = s->next)
2564 struct elf_dyn_relocs *p;
2566 for (p = (struct elf_dyn_relocs *)
2567 (elf_section_data (s)->local_dynrel);
2571 if (!bfd_is_abs_section (p->sec)
2572 && bfd_is_abs_section (p->sec->output_section))
2574 /* Input section has been discarded, either because
2575 it is a copy of a linkonce section or due to
2576 linker script /DISCARD/, so we'll be discarding
2579 else if (p->count != 0)
2581 srel = elf_section_data (p->sec)->sreloc;
2582 srel->size += p->count * bed->s->sizeof_rela;
2583 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2584 && (info->flags & DF_TEXTREL) == 0)
2586 info->flags |= DF_TEXTREL;
2587 if (info->warn_shared_textrel && info->shared)
2588 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2589 p->sec->owner, p->sec);
2595 local_got = elf_local_got_refcounts (ibfd);
2599 symtab_hdr = &elf_symtab_hdr (ibfd);
2600 locsymcount = symtab_hdr->sh_info;
2601 end_local_got = local_got + locsymcount;
2602 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
2603 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
2605 srel = htab->elf.srelgot;
2606 for (; local_got < end_local_got;
2607 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2609 *local_tlsdesc_gotent = (bfd_vma) -1;
2612 if (GOT_TLS_GDESC_P (*local_tls_type))
2614 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2615 - elf_x86_64_compute_jump_table_size (htab);
2616 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2617 *local_got = (bfd_vma) -2;
2619 if (! GOT_TLS_GDESC_P (*local_tls_type)
2620 || GOT_TLS_GD_P (*local_tls_type))
2622 *local_got = s->size;
2623 s->size += GOT_ENTRY_SIZE;
2624 if (GOT_TLS_GD_P (*local_tls_type))
2625 s->size += GOT_ENTRY_SIZE;
2628 || GOT_TLS_GD_ANY_P (*local_tls_type)
2629 || *local_tls_type == GOT_TLS_IE)
2631 if (GOT_TLS_GDESC_P (*local_tls_type))
2633 htab->elf.srelplt->size
2634 += bed->s->sizeof_rela;
2635 htab->tlsdesc_plt = (bfd_vma) -1;
2637 if (! GOT_TLS_GDESC_P (*local_tls_type)
2638 || GOT_TLS_GD_P (*local_tls_type))
2639 srel->size += bed->s->sizeof_rela;
2643 *local_got = (bfd_vma) -1;
2647 if (htab->tls_ld_got.refcount > 0)
2649 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2651 htab->tls_ld_got.offset = htab->elf.sgot->size;
2652 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2653 htab->elf.srelgot->size += bed->s->sizeof_rela;
2656 htab->tls_ld_got.offset = -1;
2658 /* Allocate global sym .plt and .got entries, and space for global
2659 sym dynamic relocs. */
2660 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
2663 /* Allocate .plt and .got entries, and space for local symbols. */
2664 htab_traverse (htab->loc_hash_table,
2665 elf_x86_64_allocate_local_dynrelocs,
2668 /* For every jump slot reserved in the sgotplt, reloc_count is
2669 incremented. However, when we reserve space for TLS descriptors,
2670 it's not incremented, so in order to compute the space reserved
2671 for them, it suffices to multiply the reloc count by the jump
2673 if (htab->elf.srelplt)
2674 htab->sgotplt_jump_table_size
2675 = elf_x86_64_compute_jump_table_size (htab);
2677 if (htab->tlsdesc_plt)
2679 /* If we're not using lazy TLS relocations, don't generate the
2680 PLT and GOT entries they require. */
2681 if ((info->flags & DF_BIND_NOW))
2682 htab->tlsdesc_plt = 0;
2685 htab->tlsdesc_got = htab->elf.sgot->size;
2686 htab->elf.sgot->size += GOT_ENTRY_SIZE;
2687 /* Reserve room for the initial entry.
2688 FIXME: we could probably do away with it in this case. */
2689 if (htab->elf.splt->size == 0)
2690 htab->elf.splt->size += PLT_ENTRY_SIZE;
2691 htab->tlsdesc_plt = htab->elf.splt->size;
2692 htab->elf.splt->size += PLT_ENTRY_SIZE;
2696 if (htab->elf.sgotplt)
2698 struct elf_link_hash_entry *got;
2699 got = elf_link_hash_lookup (elf_hash_table (info),
2700 "_GLOBAL_OFFSET_TABLE_",
2701 FALSE, FALSE, FALSE);
2703 /* Don't allocate .got.plt section if there are no GOT nor PLT
2704 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2706 || !got->ref_regular_nonweak)
2707 && (htab->elf.sgotplt->size
2708 == get_elf_backend_data (output_bfd)->got_header_size)
2709 && (htab->elf.splt == NULL
2710 || htab->elf.splt->size == 0)
2711 && (htab->elf.sgot == NULL
2712 || htab->elf.sgot->size == 0)
2713 && (htab->elf.iplt == NULL
2714 || htab->elf.iplt->size == 0)
2715 && (htab->elf.igotplt == NULL
2716 || htab->elf.igotplt->size == 0))
2717 htab->elf.sgotplt->size = 0;
2720 /* We now have determined the sizes of the various dynamic sections.
2721 Allocate memory for them. */
2723 for (s = dynobj->sections; s != NULL; s = s->next)
2725 if ((s->flags & SEC_LINKER_CREATED) == 0)
2728 if (s == htab->elf.splt
2729 || s == htab->elf.sgot
2730 || s == htab->elf.sgotplt
2731 || s == htab->elf.iplt
2732 || s == htab->elf.igotplt
2733 || s == htab->sdynbss)
2735 /* Strip this section if we don't need it; see the
2738 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2740 if (s->size != 0 && s != htab->elf.srelplt)
2743 /* We use the reloc_count field as a counter if we need
2744 to copy relocs into the output file. */
2745 if (s != htab->elf.srelplt)
2750 /* It's not one of our sections, so don't allocate space. */
2756 /* If we don't need this section, strip it from the
2757 output file. This is mostly to handle .rela.bss and
2758 .rela.plt. We must create both sections in
2759 create_dynamic_sections, because they must be created
2760 before the linker maps input sections to output
2761 sections. The linker does that before
2762 adjust_dynamic_symbol is called, and it is that
2763 function which decides whether anything needs to go
2764 into these sections. */
2766 s->flags |= SEC_EXCLUDE;
2770 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2773 /* Allocate memory for the section contents. We use bfd_zalloc
2774 here in case unused entries are not reclaimed before the
2775 section's contents are written out. This should not happen,
2776 but this way if it does, we get a R_X86_64_NONE reloc instead
2778 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2779 if (s->contents == NULL)
2783 if (htab->plt_eh_frame != NULL
2784 && htab->elf.splt != NULL
2785 && htab->elf.splt->size != 0
2786 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0)
2787 bfd_put_32 (dynobj, htab->elf.splt->size,
2788 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2790 if (htab->elf.dynamic_sections_created)
2792 /* Add some entries to the .dynamic section. We fill in the
2793 values later, in elf_x86_64_finish_dynamic_sections, but we
2794 must add the entries now so that we get the correct size for
2795 the .dynamic section. The DT_DEBUG entry is filled in by the
2796 dynamic linker and used by the debugger. */
2797 #define add_dynamic_entry(TAG, VAL) \
2798 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2800 if (info->executable)
2802 if (!add_dynamic_entry (DT_DEBUG, 0))
2806 if (htab->elf.splt->size != 0)
2808 if (!add_dynamic_entry (DT_PLTGOT, 0)
2809 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2810 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2811 || !add_dynamic_entry (DT_JMPREL, 0))
2814 if (htab->tlsdesc_plt
2815 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
2816 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
2822 if (!add_dynamic_entry (DT_RELA, 0)
2823 || !add_dynamic_entry (DT_RELASZ, 0)
2824 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
2827 /* If any dynamic relocs apply to a read-only section,
2828 then we need a DT_TEXTREL entry. */
2829 if ((info->flags & DF_TEXTREL) == 0)
2830 elf_link_hash_traverse (&htab->elf,
2831 elf_x86_64_readonly_dynrelocs,
2834 if ((info->flags & DF_TEXTREL) != 0)
2836 if (!add_dynamic_entry (DT_TEXTREL, 0))
2841 #undef add_dynamic_entry
2847 elf_x86_64_always_size_sections (bfd *output_bfd,
2848 struct bfd_link_info *info)
2850 asection *tls_sec = elf_hash_table (info)->tls_sec;
2854 struct elf_link_hash_entry *tlsbase;
2856 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2857 "_TLS_MODULE_BASE_",
2858 FALSE, FALSE, FALSE);
2860 if (tlsbase && tlsbase->type == STT_TLS)
2862 struct elf_x86_64_link_hash_table *htab;
2863 struct bfd_link_hash_entry *bh = NULL;
2864 const struct elf_backend_data *bed
2865 = get_elf_backend_data (output_bfd);
2867 htab = elf_x86_64_hash_table (info);
2871 if (!(_bfd_generic_link_add_one_symbol
2872 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2873 tls_sec, 0, NULL, FALSE,
2874 bed->collect, &bh)))
2877 htab->tls_module_base = bh;
2879 tlsbase = (struct elf_link_hash_entry *)bh;
2880 tlsbase->def_regular = 1;
2881 tlsbase->other = STV_HIDDEN;
2882 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2889 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2890 executables. Rather than setting it to the beginning of the TLS
2891 section, we have to set it to the end. This function may be called
2892 multiple times, it is idempotent. */
2895 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
2897 struct elf_x86_64_link_hash_table *htab;
2898 struct bfd_link_hash_entry *base;
2900 if (!info->executable)
2903 htab = elf_x86_64_hash_table (info);
2907 base = htab->tls_module_base;
2911 base->u.def.value = htab->elf.tls_size;
2914 /* Return the base VMA address which should be subtracted from real addresses
2915 when resolving @dtpoff relocation.
2916 This is PT_TLS segment p_vaddr. */
2919 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
2921 /* If tls_sec is NULL, we should have signalled an error already. */
2922 if (elf_hash_table (info)->tls_sec == NULL)
2924 return elf_hash_table (info)->tls_sec->vma;
2927 /* Return the relocation value for @tpoff relocation
2928 if STT_TLS virtual address is ADDRESS. */
2931 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
2933 struct elf_link_hash_table *htab = elf_hash_table (info);
2934 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2935 bfd_vma static_tls_size;
2937 /* If tls_segment is NULL, we should have signalled an error already. */
2938 if (htab->tls_sec == NULL)
2941 /* Consider special static TLS alignment requirements. */
2942 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2943 return address - static_tls_size - htab->tls_sec->vma;
2946 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
2950 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
2952 /* Opcode Instruction
2955 0x0f 0x8x conditional jump */
2957 && (contents [offset - 1] == 0xe8
2958 || contents [offset - 1] == 0xe9))
2960 && contents [offset - 2] == 0x0f
2961 && (contents [offset - 1] & 0xf0) == 0x80));
2964 /* Relocate an x86_64 ELF section. */
2967 elf_x86_64_relocate_section (bfd *output_bfd,
2968 struct bfd_link_info *info,
2970 asection *input_section,
2972 Elf_Internal_Rela *relocs,
2973 Elf_Internal_Sym *local_syms,
2974 asection **local_sections)
2976 struct elf_x86_64_link_hash_table *htab;
2977 Elf_Internal_Shdr *symtab_hdr;
2978 struct elf_link_hash_entry **sym_hashes;
2979 bfd_vma *local_got_offsets;
2980 bfd_vma *local_tlsdesc_gotents;
2981 Elf_Internal_Rela *rel;
2982 Elf_Internal_Rela *relend;
2984 BFD_ASSERT (is_x86_64_elf (input_bfd));
2986 htab = elf_x86_64_hash_table (info);
2989 symtab_hdr = &elf_symtab_hdr (input_bfd);
2990 sym_hashes = elf_sym_hashes (input_bfd);
2991 local_got_offsets = elf_local_got_offsets (input_bfd);
2992 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
2994 elf_x86_64_set_tls_module_base (info);
2997 relend = relocs + input_section->reloc_count;
2998 for (; rel < relend; rel++)
3000 unsigned int r_type;
3001 reloc_howto_type *howto;
3002 unsigned long r_symndx;
3003 struct elf_link_hash_entry *h;
3004 Elf_Internal_Sym *sym;
3006 bfd_vma off, offplt;
3008 bfd_boolean unresolved_reloc;
3009 bfd_reloc_status_type r;
3013 r_type = ELF32_R_TYPE (rel->r_info);
3014 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3015 || r_type == (int) R_X86_64_GNU_VTENTRY)
3018 if (r_type >= R_X86_64_max)
3020 bfd_set_error (bfd_error_bad_value);
3024 howto = x86_64_elf_howto_table + r_type;
3025 r_symndx = htab->r_sym (rel->r_info);
3029 unresolved_reloc = FALSE;
3030 if (r_symndx < symtab_hdr->sh_info)
3032 sym = local_syms + r_symndx;
3033 sec = local_sections[r_symndx];
3035 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3038 /* Relocate against local STT_GNU_IFUNC symbol. */
3039 if (!info->relocatable
3040 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3042 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3047 /* Set STT_GNU_IFUNC symbol value. */
3048 h->root.u.def.value = sym->st_value;
3049 h->root.u.def.section = sec;
3054 bfd_boolean warned ATTRIBUTE_UNUSED;
3056 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3057 r_symndx, symtab_hdr, sym_hashes,
3059 unresolved_reloc, warned);
3062 if (sec != NULL && elf_discarded_section (sec))
3063 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3064 rel, relend, howto, contents);
3066 if (info->relocatable)
3069 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3070 it here if it is defined in a non-shared object. */
3072 && h->type == STT_GNU_IFUNC
3079 if ((input_section->flags & SEC_ALLOC) == 0
3080 || h->plt.offset == (bfd_vma) -1)
3083 /* STT_GNU_IFUNC symbol must go through PLT. */
3084 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3085 relocation = (plt->output_section->vma
3086 + plt->output_offset + h->plt.offset);
3091 if (h->root.root.string)
3092 name = h->root.root.string;
3094 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3096 (*_bfd_error_handler)
3097 (_("%B: relocation %s against STT_GNU_IFUNC "
3098 "symbol `%s' isn't handled by %s"), input_bfd,
3099 x86_64_elf_howto_table[r_type].name,
3100 name, __FUNCTION__);
3101 bfd_set_error (bfd_error_bad_value);
3110 if (ABI_64_P (output_bfd))
3114 if (rel->r_addend != 0)
3116 if (h->root.root.string)
3117 name = h->root.root.string;
3119 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3121 (*_bfd_error_handler)
3122 (_("%B: relocation %s against STT_GNU_IFUNC "
3123 "symbol `%s' has non-zero addend: %d"),
3124 input_bfd, x86_64_elf_howto_table[r_type].name,
3125 name, rel->r_addend);
3126 bfd_set_error (bfd_error_bad_value);
3130 /* Generate dynamic relcoation only when there is a
3131 non-GOF reference in a shared object. */
3132 if (info->shared && h->non_got_ref)
3134 Elf_Internal_Rela outrel;
3137 /* Need a dynamic relocation to get the real function
3139 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3143 if (outrel.r_offset == (bfd_vma) -1
3144 || outrel.r_offset == (bfd_vma) -2)
3147 outrel.r_offset += (input_section->output_section->vma
3148 + input_section->output_offset);
3150 if (h->dynindx == -1
3152 || info->executable)
3154 /* This symbol is resolved locally. */
3155 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3156 outrel.r_addend = (h->root.u.def.value
3157 + h->root.u.def.section->output_section->vma
3158 + h->root.u.def.section->output_offset);
3162 outrel.r_info = htab->r_info (h->dynindx, r_type);
3163 outrel.r_addend = 0;
3166 sreloc = htab->elf.irelifunc;
3167 elf_append_rela (output_bfd, sreloc, &outrel);
3169 /* If this reloc is against an external symbol, we
3170 do not want to fiddle with the addend. Otherwise,
3171 we need to include the symbol value so that it
3172 becomes an addend for the dynamic reloc. For an
3173 internal symbol, we have updated addend. */
3179 case R_X86_64_PLT32:
3182 case R_X86_64_GOTPCREL:
3183 case R_X86_64_GOTPCREL64:
3184 base_got = htab->elf.sgot;
3185 off = h->got.offset;
3187 if (base_got == NULL)
3190 if (off == (bfd_vma) -1)
3192 /* We can't use h->got.offset here to save state, or
3193 even just remember the offset, as finish_dynamic_symbol
3194 would use that as offset into .got. */
3196 if (htab->elf.splt != NULL)
3198 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3199 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3200 base_got = htab->elf.sgotplt;
3204 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
3205 off = plt_index * GOT_ENTRY_SIZE;
3206 base_got = htab->elf.igotplt;
3209 if (h->dynindx == -1
3213 /* This references the local defitionion. We must
3214 initialize this entry in the global offset table.
3215 Since the offset must always be a multiple of 8,
3216 we use the least significant bit to record
3217 whether we have initialized it already.
3219 When doing a dynamic link, we create a .rela.got
3220 relocation entry to initialize the value. This
3221 is done in the finish_dynamic_symbol routine. */
3226 bfd_put_64 (output_bfd, relocation,
3227 base_got->contents + off);
3228 /* Note that this is harmless for the GOTPLT64
3229 case, as -1 | 1 still is -1. */
3235 relocation = (base_got->output_section->vma
3236 + base_got->output_offset + off);
3242 /* When generating a shared object, the relocations handled here are
3243 copied into the output file to be resolved at run time. */
3246 case R_X86_64_GOT32:
3247 case R_X86_64_GOT64:
3248 /* Relocation is to the entry for this symbol in the global
3250 case R_X86_64_GOTPCREL:
3251 case R_X86_64_GOTPCREL64:
3252 /* Use global offset table entry as symbol value. */
3253 case R_X86_64_GOTPLT64:
3254 /* This is the same as GOT64 for relocation purposes, but
3255 indicates the existence of a PLT entry. The difficulty is,
3256 that we must calculate the GOT slot offset from the PLT
3257 offset, if this symbol got a PLT entry (it was global).
3258 Additionally if it's computed from the PLT entry, then that
3259 GOT offset is relative to .got.plt, not to .got. */
3260 base_got = htab->elf.sgot;
3262 if (htab->elf.sgot == NULL)
3269 off = h->got.offset;
3271 && h->plt.offset != (bfd_vma)-1
3272 && off == (bfd_vma)-1)
3274 /* We can't use h->got.offset here to save
3275 state, or even just remember the offset, as
3276 finish_dynamic_symbol would use that as offset into
3278 bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3279 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3280 base_got = htab->elf.sgotplt;
3283 dyn = htab->elf.dynamic_sections_created;
3285 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3287 && SYMBOL_REFERENCES_LOCAL (info, h))
3288 || (ELF_ST_VISIBILITY (h->other)
3289 && h->root.type == bfd_link_hash_undefweak))
3291 /* This is actually a static link, or it is a -Bsymbolic
3292 link and the symbol is defined locally, or the symbol
3293 was forced to be local because of a version file. We
3294 must initialize this entry in the global offset table.
3295 Since the offset must always be a multiple of 8, we
3296 use the least significant bit to record whether we
3297 have initialized it already.
3299 When doing a dynamic link, we create a .rela.got
3300 relocation entry to initialize the value. This is
3301 done in the finish_dynamic_symbol routine. */
3306 bfd_put_64 (output_bfd, relocation,
3307 base_got->contents + off);
3308 /* Note that this is harmless for the GOTPLT64 case,
3309 as -1 | 1 still is -1. */
3314 unresolved_reloc = FALSE;
3318 if (local_got_offsets == NULL)
3321 off = local_got_offsets[r_symndx];
3323 /* The offset must always be a multiple of 8. We use
3324 the least significant bit to record whether we have
3325 already generated the necessary reloc. */
3330 bfd_put_64 (output_bfd, relocation,
3331 base_got->contents + off);
3336 Elf_Internal_Rela outrel;
3338 /* We need to generate a R_X86_64_RELATIVE reloc
3339 for the dynamic linker. */
3340 s = htab->elf.srelgot;
3344 outrel.r_offset = (base_got->output_section->vma
3345 + base_got->output_offset
3347 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3348 outrel.r_addend = relocation;
3349 elf_append_rela (output_bfd, s, &outrel);
3352 local_got_offsets[r_symndx] |= 1;
3356 if (off >= (bfd_vma) -2)
3359 relocation = base_got->output_section->vma
3360 + base_got->output_offset + off;
3361 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
3362 relocation -= htab->elf.sgotplt->output_section->vma
3363 - htab->elf.sgotplt->output_offset;
3367 case R_X86_64_GOTOFF64:
3368 /* Relocation is relative to the start of the global offset
3371 /* Check to make sure it isn't a protected function symbol
3372 for shared library since it may not be local when used
3373 as function address. */
3377 && h->type == STT_FUNC
3378 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3380 (*_bfd_error_handler)
3381 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3382 input_bfd, h->root.root.string);
3383 bfd_set_error (bfd_error_bad_value);
3387 /* Note that sgot is not involved in this
3388 calculation. We always want the start of .got.plt. If we
3389 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3390 permitted by the ABI, we might have to change this
3392 relocation -= htab->elf.sgotplt->output_section->vma
3393 + htab->elf.sgotplt->output_offset;
3396 case R_X86_64_GOTPC32:
3397 case R_X86_64_GOTPC64:
3398 /* Use global offset table as symbol value. */
3399 relocation = htab->elf.sgotplt->output_section->vma
3400 + htab->elf.sgotplt->output_offset;
3401 unresolved_reloc = FALSE;
3404 case R_X86_64_PLTOFF64:
3405 /* Relocation is PLT entry relative to GOT. For local
3406 symbols it's the symbol itself relative to GOT. */
3408 /* See PLT32 handling. */
3409 && h->plt.offset != (bfd_vma) -1
3410 && htab->elf.splt != NULL)
3412 relocation = (htab->elf.splt->output_section->vma
3413 + htab->elf.splt->output_offset
3415 unresolved_reloc = FALSE;
3418 relocation -= htab->elf.sgotplt->output_section->vma
3419 + htab->elf.sgotplt->output_offset;
3422 case R_X86_64_PLT32:
3423 /* Relocation is to the entry for this symbol in the
3424 procedure linkage table. */
3426 /* Resolve a PLT32 reloc against a local symbol directly,
3427 without using the procedure linkage table. */
3431 if (h->plt.offset == (bfd_vma) -1
3432 || htab->elf.splt == NULL)
3434 /* We didn't make a PLT entry for this symbol. This
3435 happens when statically linking PIC code, or when
3436 using -Bsymbolic. */
3440 relocation = (htab->elf.splt->output_section->vma
3441 + htab->elf.splt->output_offset
3443 unresolved_reloc = FALSE;
3450 && ABI_64_P (output_bfd)
3451 && (input_section->flags & SEC_ALLOC) != 0
3452 && (input_section->flags & SEC_READONLY) != 0
3455 bfd_boolean fail = FALSE;
3457 = (r_type == R_X86_64_PC32
3458 && is_32bit_relative_branch (contents, rel->r_offset));
3460 if (SYMBOL_REFERENCES_LOCAL (info, h))
3462 /* Symbol is referenced locally. Make sure it is
3463 defined locally or for a branch. */
3464 fail = !h->def_regular && !branch;
3468 /* Symbol isn't referenced locally. We only allow
3469 branch to symbol with non-default visibility. */
3471 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3478 const char *pic = "";
3480 switch (ELF_ST_VISIBILITY (h->other))
3483 v = _("hidden symbol");
3486 v = _("internal symbol");
3489 v = _("protected symbol");
3493 pic = _("; recompile with -fPIC");
3498 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3500 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3502 (*_bfd_error_handler) (fmt, input_bfd,
3503 x86_64_elf_howto_table[r_type].name,
3504 v, h->root.root.string, pic);
3505 bfd_set_error (bfd_error_bad_value);
3516 /* FIXME: The ABI says the linker should make sure the value is
3517 the same when it's zeroextended to 64 bit. */
3519 if ((input_section->flags & SEC_ALLOC) == 0)
3524 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3525 || h->root.type != bfd_link_hash_undefweak)
3526 && (! IS_X86_64_PCREL_TYPE (r_type)
3527 || ! SYMBOL_CALLS_LOCAL (info, h)))
3528 || (ELIMINATE_COPY_RELOCS
3535 || h->root.type == bfd_link_hash_undefweak
3536 || h->root.type == bfd_link_hash_undefined)))
3538 Elf_Internal_Rela outrel;
3539 bfd_boolean skip, relocate;
3542 /* When generating a shared object, these relocations
3543 are copied into the output file to be resolved at run
3549 _bfd_elf_section_offset (output_bfd, info, input_section,
3551 if (outrel.r_offset == (bfd_vma) -1)
3553 else if (outrel.r_offset == (bfd_vma) -2)
3554 skip = TRUE, relocate = TRUE;
3556 outrel.r_offset += (input_section->output_section->vma
3557 + input_section->output_offset);
3560 memset (&outrel, 0, sizeof outrel);
3562 /* h->dynindx may be -1 if this symbol was marked to
3566 && (IS_X86_64_PCREL_TYPE (r_type)
3568 || ! SYMBOLIC_BIND (info, h)
3569 || ! h->def_regular))
3571 outrel.r_info = htab->r_info (h->dynindx, r_type);
3572 outrel.r_addend = rel->r_addend;
3576 /* This symbol is local, or marked to become local. */
3577 if (r_type == htab->pointer_r_type)
3580 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3581 outrel.r_addend = relocation + rel->r_addend;
3587 if (bfd_is_abs_section (sec))
3589 else if (sec == NULL || sec->owner == NULL)
3591 bfd_set_error (bfd_error_bad_value);
3598 /* We are turning this relocation into one
3599 against a section symbol. It would be
3600 proper to subtract the symbol's value,
3601 osec->vma, from the emitted reloc addend,
3602 but ld.so expects buggy relocs. */
3603 osec = sec->output_section;
3604 sindx = elf_section_data (osec)->dynindx;
3607 asection *oi = htab->elf.text_index_section;
3608 sindx = elf_section_data (oi)->dynindx;
3610 BFD_ASSERT (sindx != 0);
3613 outrel.r_info = htab->r_info (sindx, r_type);
3614 outrel.r_addend = relocation + rel->r_addend;
3618 sreloc = elf_section_data (input_section)->sreloc;
3620 if (sreloc == NULL || sreloc->contents == NULL)
3622 r = bfd_reloc_notsupported;
3623 goto check_relocation_error;
3626 elf_append_rela (output_bfd, sreloc, &outrel);
3628 /* If this reloc is against an external symbol, we do
3629 not want to fiddle with the addend. Otherwise, we
3630 need to include the symbol value so that it becomes
3631 an addend for the dynamic reloc. */
3638 case R_X86_64_TLSGD:
3639 case R_X86_64_GOTPC32_TLSDESC:
3640 case R_X86_64_TLSDESC_CALL:
3641 case R_X86_64_GOTTPOFF:
3642 tls_type = GOT_UNKNOWN;
3643 if (h == NULL && local_got_offsets)
3644 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
3646 tls_type = elf_x86_64_hash_entry (h)->tls_type;
3648 if (! elf_x86_64_tls_transition (info, input_bfd,
3649 input_section, contents,
3650 symtab_hdr, sym_hashes,
3651 &r_type, tls_type, rel,
3652 relend, h, r_symndx))
3655 if (r_type == R_X86_64_TPOFF32)
3657 bfd_vma roff = rel->r_offset;
3659 BFD_ASSERT (! unresolved_reloc);
3661 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
3663 /* GD->LE transition. For 64bit, change
3664 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3665 .word 0x6666; rex64; call __tls_get_addr
3668 leaq foo@tpoff(%rax), %rax
3670 leaq foo@tlsgd(%rip), %rdi
3671 .word 0x6666; rex64; call __tls_get_addr
3674 leaq foo@tpoff(%rax), %rax */
3675 if (ABI_64_P (output_bfd))
3676 memcpy (contents + roff - 4,
3677 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3680 memcpy (contents + roff - 3,
3681 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3683 bfd_put_32 (output_bfd,
3684 elf_x86_64_tpoff (info, relocation),
3685 contents + roff + 8);
3686 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
3690 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
3692 /* GDesc -> LE transition.
3693 It's originally something like:
3694 leaq x@tlsdesc(%rip), %rax
3697 movl $x@tpoff, %rax. */
3699 unsigned int val, type;
3701 type = bfd_get_8 (input_bfd, contents + roff - 3);
3702 val = bfd_get_8 (input_bfd, contents + roff - 1);
3703 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
3704 contents + roff - 3);
3705 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
3706 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3707 contents + roff - 1);
3708 bfd_put_32 (output_bfd,
3709 elf_x86_64_tpoff (info, relocation),
3713 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
3715 /* GDesc -> LE transition.
3720 bfd_put_8 (output_bfd, 0x66, contents + roff);
3721 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3724 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
3726 /* IE->LE transition:
3727 Originally it can be one of:
3728 movq foo@gottpoff(%rip), %reg
3729 addq foo@gottpoff(%rip), %reg
3732 leaq foo(%reg), %reg
3735 unsigned int val, type, reg;
3737 val = bfd_get_8 (input_bfd, contents + roff - 3);
3738 type = bfd_get_8 (input_bfd, contents + roff - 2);
3739 reg = bfd_get_8 (input_bfd, contents + roff - 1);
3745 bfd_put_8 (output_bfd, 0x49,
3746 contents + roff - 3);
3747 else if (!ABI_64_P (output_bfd) && val == 0x44)
3748 bfd_put_8 (output_bfd, 0x41,
3749 contents + roff - 3);
3750 bfd_put_8 (output_bfd, 0xc7,
3751 contents + roff - 2);
3752 bfd_put_8 (output_bfd, 0xc0 | reg,
3753 contents + roff - 1);
3757 /* addq -> addq - addressing with %rsp/%r12 is
3760 bfd_put_8 (output_bfd, 0x49,
3761 contents + roff - 3);
3762 else if (!ABI_64_P (output_bfd) && val == 0x44)
3763 bfd_put_8 (output_bfd, 0x41,
3764 contents + roff - 3);
3765 bfd_put_8 (output_bfd, 0x81,
3766 contents + roff - 2);
3767 bfd_put_8 (output_bfd, 0xc0 | reg,
3768 contents + roff - 1);
3774 bfd_put_8 (output_bfd, 0x4d,
3775 contents + roff - 3);
3776 else if (!ABI_64_P (output_bfd) && val == 0x44)
3777 bfd_put_8 (output_bfd, 0x45,
3778 contents + roff - 3);
3779 bfd_put_8 (output_bfd, 0x8d,
3780 contents + roff - 2);
3781 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
3782 contents + roff - 1);
3784 bfd_put_32 (output_bfd,
3785 elf_x86_64_tpoff (info, relocation),
3793 if (htab->elf.sgot == NULL)
3798 off = h->got.offset;
3799 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
3803 if (local_got_offsets == NULL)
3806 off = local_got_offsets[r_symndx];
3807 offplt = local_tlsdesc_gotents[r_symndx];
3814 Elf_Internal_Rela outrel;
3818 if (htab->elf.srelgot == NULL)
3821 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3823 if (GOT_TLS_GDESC_P (tls_type))
3825 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
3826 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
3827 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
3828 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3829 + htab->elf.sgotplt->output_offset
3831 + htab->sgotplt_jump_table_size);
3832 sreloc = htab->elf.srelplt;
3834 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
3836 outrel.r_addend = 0;
3837 elf_append_rela (output_bfd, sreloc, &outrel);
3840 sreloc = htab->elf.srelgot;
3842 outrel.r_offset = (htab->elf.sgot->output_section->vma
3843 + htab->elf.sgot->output_offset + off);
3845 if (GOT_TLS_GD_P (tls_type))
3846 dr_type = R_X86_64_DTPMOD64;
3847 else if (GOT_TLS_GDESC_P (tls_type))
3850 dr_type = R_X86_64_TPOFF64;
3852 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
3853 outrel.r_addend = 0;
3854 if ((dr_type == R_X86_64_TPOFF64
3855 || dr_type == R_X86_64_TLSDESC) && indx == 0)
3856 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
3857 outrel.r_info = htab->r_info (indx, dr_type);
3859 elf_append_rela (output_bfd, sreloc, &outrel);
3861 if (GOT_TLS_GD_P (tls_type))
3865 BFD_ASSERT (! unresolved_reloc);
3866 bfd_put_64 (output_bfd,
3867 relocation - elf_x86_64_dtpoff_base (info),
3868 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3872 bfd_put_64 (output_bfd, 0,
3873 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3874 outrel.r_info = htab->r_info (indx,
3876 outrel.r_offset += GOT_ENTRY_SIZE;
3877 elf_append_rela (output_bfd, sreloc,
3886 local_got_offsets[r_symndx] |= 1;
3889 if (off >= (bfd_vma) -2
3890 && ! GOT_TLS_GDESC_P (tls_type))
3892 if (r_type == ELF32_R_TYPE (rel->r_info))
3894 if (r_type == R_X86_64_GOTPC32_TLSDESC
3895 || r_type == R_X86_64_TLSDESC_CALL)
3896 relocation = htab->elf.sgotplt->output_section->vma
3897 + htab->elf.sgotplt->output_offset
3898 + offplt + htab->sgotplt_jump_table_size;
3900 relocation = htab->elf.sgot->output_section->vma
3901 + htab->elf.sgot->output_offset + off;
3902 unresolved_reloc = FALSE;
3906 bfd_vma roff = rel->r_offset;
3908 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
3910 /* GD->IE transition. For 64bit, change
3911 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3912 .word 0x6666; rex64; call __tls_get_addr@plt
3915 addq foo@gottpoff(%rip), %rax
3917 leaq foo@tlsgd(%rip), %rdi
3918 .word 0x6666; rex64; call __tls_get_addr@plt
3921 addq foo@gottpoff(%rip), %rax */
3922 if (ABI_64_P (output_bfd))
3923 memcpy (contents + roff - 4,
3924 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3927 memcpy (contents + roff - 3,
3928 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3931 relocation = (htab->elf.sgot->output_section->vma
3932 + htab->elf.sgot->output_offset + off
3934 - input_section->output_section->vma
3935 - input_section->output_offset
3937 bfd_put_32 (output_bfd, relocation,
3938 contents + roff + 8);
3939 /* Skip R_X86_64_PLT32. */
3943 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
3945 /* GDesc -> IE transition.
3946 It's originally something like:
3947 leaq x@tlsdesc(%rip), %rax
3950 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
3952 /* Now modify the instruction as appropriate. To
3953 turn a leaq into a movq in the form we use it, it
3954 suffices to change the second byte from 0x8d to
3956 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3958 bfd_put_32 (output_bfd,
3959 htab->elf.sgot->output_section->vma
3960 + htab->elf.sgot->output_offset + off
3962 - input_section->output_section->vma
3963 - input_section->output_offset
3968 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
3970 /* GDesc -> IE transition.
3977 bfd_put_8 (output_bfd, 0x66, contents + roff);
3978 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3986 case R_X86_64_TLSLD:
3987 if (! elf_x86_64_tls_transition (info, input_bfd,
3988 input_section, contents,
3989 symtab_hdr, sym_hashes,
3990 &r_type, GOT_UNKNOWN,
3991 rel, relend, h, r_symndx))
3994 if (r_type != R_X86_64_TLSLD)
3996 /* LD->LE transition:
3997 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
3998 For 64bit, we change it into:
3999 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4000 For 32bit, we change it into:
4001 nopl 0x0(%rax); movl %fs:0, %eax. */
4003 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
4004 if (ABI_64_P (output_bfd))
4005 memcpy (contents + rel->r_offset - 3,
4006 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4008 memcpy (contents + rel->r_offset - 3,
4009 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4010 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
4015 if (htab->elf.sgot == NULL)
4018 off = htab->tls_ld_got.offset;
4023 Elf_Internal_Rela outrel;
4025 if (htab->elf.srelgot == NULL)
4028 outrel.r_offset = (htab->elf.sgot->output_section->vma
4029 + htab->elf.sgot->output_offset + off);
4031 bfd_put_64 (output_bfd, 0,
4032 htab->elf.sgot->contents + off);
4033 bfd_put_64 (output_bfd, 0,
4034 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4035 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
4036 outrel.r_addend = 0;
4037 elf_append_rela (output_bfd, htab->elf.srelgot,
4039 htab->tls_ld_got.offset |= 1;
4041 relocation = htab->elf.sgot->output_section->vma
4042 + htab->elf.sgot->output_offset + off;
4043 unresolved_reloc = FALSE;
4046 case R_X86_64_DTPOFF32:
4047 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
4048 relocation -= elf_x86_64_dtpoff_base (info);
4050 relocation = elf_x86_64_tpoff (info, relocation);
4053 case R_X86_64_TPOFF32:
4054 case R_X86_64_TPOFF64:
4055 BFD_ASSERT (info->executable);
4056 relocation = elf_x86_64_tpoff (info, relocation);
4063 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4064 because such sections are not SEC_ALLOC and thus ld.so will
4065 not process them. */
4066 if (unresolved_reloc
4067 && !((input_section->flags & SEC_DEBUGGING) != 0
4069 (*_bfd_error_handler)
4070 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4073 (long) rel->r_offset,
4075 h->root.root.string);
4078 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4079 contents, rel->r_offset,
4080 relocation, rel->r_addend);
4082 check_relocation_error:
4083 if (r != bfd_reloc_ok)
4088 name = h->root.root.string;
4091 name = bfd_elf_string_from_elf_section (input_bfd,
4092 symtab_hdr->sh_link,
4097 name = bfd_section_name (input_bfd, sec);
4100 if (r == bfd_reloc_overflow)
4102 if (! ((*info->callbacks->reloc_overflow)
4103 (info, (h ? &h->root : NULL), name, howto->name,
4104 (bfd_vma) 0, input_bfd, input_section,
4110 (*_bfd_error_handler)
4111 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4112 input_bfd, input_section,
4113 (long) rel->r_offset, name, (int) r);
4122 /* Finish up dynamic symbol handling. We set the contents of various
4123 dynamic sections here. */
4126 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4127 struct bfd_link_info *info,
4128 struct elf_link_hash_entry *h,
4129 Elf_Internal_Sym *sym)
4131 struct elf_x86_64_link_hash_table *htab;
4133 htab = elf_x86_64_hash_table (info);
4137 if (h->plt.offset != (bfd_vma) -1)
4141 Elf_Internal_Rela rela;
4143 asection *plt, *gotplt, *relplt;
4144 const struct elf_backend_data *bed;
4146 /* When building a static executable, use .iplt, .igot.plt and
4147 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4148 if (htab->elf.splt != NULL)
4150 plt = htab->elf.splt;
4151 gotplt = htab->elf.sgotplt;
4152 relplt = htab->elf.srelplt;
4156 plt = htab->elf.iplt;
4157 gotplt = htab->elf.igotplt;
4158 relplt = htab->elf.irelplt;
4161 /* This symbol has an entry in the procedure linkage table. Set
4163 if ((h->dynindx == -1
4164 && !((h->forced_local || info->executable)
4166 && h->type == STT_GNU_IFUNC))
4172 /* Get the index in the procedure linkage table which
4173 corresponds to this symbol. This is the index of this symbol
4174 in all the symbols for which we are making plt entries. The
4175 first entry in the procedure linkage table is reserved.
4177 Get the offset into the .got table of the entry that
4178 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4179 bytes. The first three are reserved for the dynamic linker.
4181 For static executables, we don't reserve anything. */
4183 if (plt == htab->elf.splt)
4185 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
4186 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
4190 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
4191 got_offset = plt_index * GOT_ENTRY_SIZE;
4194 /* Fill in the entry in the procedure linkage table. */
4195 memcpy (plt->contents + h->plt.offset, elf_x86_64_plt_entry,
4198 /* Insert the relocation positions of the plt section. The magic
4199 numbers at the end of the statements are the positions of the
4200 relocations in the plt section. */
4201 /* Put offset for jmp *name@GOTPCREL(%rip), since the
4202 instruction uses 6 bytes, subtract this value. */
4203 bfd_put_32 (output_bfd,
4204 (gotplt->output_section->vma
4205 + gotplt->output_offset
4207 - plt->output_section->vma
4208 - plt->output_offset
4211 plt->contents + h->plt.offset + 2);
4213 /* Don't fill PLT entry for static executables. */
4214 if (plt == htab->elf.splt)
4216 /* Put relocation index. */
4217 bfd_put_32 (output_bfd, plt_index,
4218 plt->contents + h->plt.offset + 7);
4219 /* Put offset for jmp .PLT0. */
4220 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
4221 plt->contents + h->plt.offset + 12);
4224 /* Fill in the entry in the global offset table, initially this
4225 points to the pushq instruction in the PLT which is at offset 6. */
4226 bfd_put_64 (output_bfd, (plt->output_section->vma
4227 + plt->output_offset
4228 + h->plt.offset + 6),
4229 gotplt->contents + got_offset);
4231 /* Fill in the entry in the .rela.plt section. */
4232 rela.r_offset = (gotplt->output_section->vma
4233 + gotplt->output_offset
4235 if (h->dynindx == -1
4236 || ((info->executable
4237 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4239 && h->type == STT_GNU_IFUNC))
4241 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4242 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4243 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4244 rela.r_addend = (h->root.u.def.value
4245 + h->root.u.def.section->output_section->vma
4246 + h->root.u.def.section->output_offset);
4250 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
4254 bed = get_elf_backend_data (output_bfd);
4255 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
4256 bed->s->swap_reloca_out (output_bfd, &rela, loc);
4258 if (!h->def_regular)
4260 /* Mark the symbol as undefined, rather than as defined in
4261 the .plt section. Leave the value if there were any
4262 relocations where pointer equality matters (this is a clue
4263 for the dynamic linker, to make function pointer
4264 comparisons work between an application and shared
4265 library), otherwise set it to zero. If a function is only
4266 called from a binary, there is no need to slow down
4267 shared libraries because of that. */
4268 sym->st_shndx = SHN_UNDEF;
4269 if (!h->pointer_equality_needed)
4274 if (h->got.offset != (bfd_vma) -1
4275 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
4276 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
4278 Elf_Internal_Rela rela;
4280 /* This symbol has an entry in the global offset table. Set it
4282 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4285 rela.r_offset = (htab->elf.sgot->output_section->vma
4286 + htab->elf.sgot->output_offset
4287 + (h->got.offset &~ (bfd_vma) 1));
4289 /* If this is a static link, or it is a -Bsymbolic link and the
4290 symbol is defined locally or was forced to be local because
4291 of a version file, we just want to emit a RELATIVE reloc.
4292 The entry in the global offset table will already have been
4293 initialized in the relocate_section function. */
4295 && h->type == STT_GNU_IFUNC)
4299 /* Generate R_X86_64_GLOB_DAT. */
4306 if (!h->pointer_equality_needed)
4309 /* For non-shared object, we can't use .got.plt, which
4310 contains the real function addres if we need pointer
4311 equality. We load the GOT entry with the PLT entry. */
4312 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4313 bfd_put_64 (output_bfd, (plt->output_section->vma
4314 + plt->output_offset
4316 htab->elf.sgot->contents + h->got.offset);
4320 else if (info->shared
4321 && SYMBOL_REFERENCES_LOCAL (info, h))
4323 if (!h->def_regular)
4325 BFD_ASSERT((h->got.offset & 1) != 0);
4326 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4327 rela.r_addend = (h->root.u.def.value
4328 + h->root.u.def.section->output_section->vma
4329 + h->root.u.def.section->output_offset);
4333 BFD_ASSERT((h->got.offset & 1) == 0);
4335 bfd_put_64 (output_bfd, (bfd_vma) 0,
4336 htab->elf.sgot->contents + h->got.offset);
4337 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
4341 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
4346 Elf_Internal_Rela rela;
4348 /* This symbol needs a copy reloc. Set it up. */
4350 if (h->dynindx == -1
4351 || (h->root.type != bfd_link_hash_defined
4352 && h->root.type != bfd_link_hash_defweak)
4353 || htab->srelbss == NULL)
4356 rela.r_offset = (h->root.u.def.value
4357 + h->root.u.def.section->output_section->vma
4358 + h->root.u.def.section->output_offset);
4359 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
4361 elf_append_rela (output_bfd, htab->srelbss, &rela);
4364 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4365 be NULL for local symbols. */
4367 && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4368 || h == htab->elf.hgot))
4369 sym->st_shndx = SHN_ABS;
4374 /* Finish up local dynamic symbol handling. We set the contents of
4375 various dynamic sections here. */
4378 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
4380 struct elf_link_hash_entry *h
4381 = (struct elf_link_hash_entry *) *slot;
4382 struct bfd_link_info *info
4383 = (struct bfd_link_info *) inf;
4385 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
4389 /* Used to decide how to sort relocs in an optimal manner for the
4390 dynamic linker, before writing them out. */
4392 static enum elf_reloc_type_class
4393 elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
4395 switch ((int) ELF32_R_TYPE (rela->r_info))
4397 case R_X86_64_RELATIVE:
4398 return reloc_class_relative;
4399 case R_X86_64_JUMP_SLOT:
4400 return reloc_class_plt;
4402 return reloc_class_copy;
4404 return reloc_class_normal;
4408 /* Finish up the dynamic sections. */
4411 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
4412 struct bfd_link_info *info)
4414 struct elf_x86_64_link_hash_table *htab;
4418 htab = elf_x86_64_hash_table (info);
4422 dynobj = htab->elf.dynobj;
4423 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4425 if (htab->elf.dynamic_sections_created)
4427 bfd_byte *dyncon, *dynconend;
4428 const struct elf_backend_data *bed;
4429 bfd_size_type sizeof_dyn;
4431 if (sdyn == NULL || htab->elf.sgot == NULL)
4434 bed = get_elf_backend_data (dynobj);
4435 sizeof_dyn = bed->s->sizeof_dyn;
4436 dyncon = sdyn->contents;
4437 dynconend = sdyn->contents + sdyn->size;
4438 for (; dyncon < dynconend; dyncon += sizeof_dyn)
4440 Elf_Internal_Dyn dyn;
4443 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
4451 s = htab->elf.sgotplt;
4452 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4456 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
4460 s = htab->elf.srelplt->output_section;
4461 dyn.d_un.d_val = s->size;
4465 /* The procedure linkage table relocs (DT_JMPREL) should
4466 not be included in the overall relocs (DT_RELA).
4467 Therefore, we override the DT_RELASZ entry here to
4468 make it not include the JMPREL relocs. Since the
4469 linker script arranges for .rela.plt to follow all
4470 other relocation sections, we don't have to worry
4471 about changing the DT_RELA entry. */
4472 if (htab->elf.srelplt != NULL)
4474 s = htab->elf.srelplt->output_section;
4475 dyn.d_un.d_val -= s->size;
4479 case DT_TLSDESC_PLT:
4481 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4482 + htab->tlsdesc_plt;
4485 case DT_TLSDESC_GOT:
4487 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4488 + htab->tlsdesc_got;
4492 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
4495 /* Fill in the special first entry in the procedure linkage table. */
4496 if (htab->elf.splt && htab->elf.splt->size > 0)
4498 /* Fill in the first entry in the procedure linkage table. */
4499 memcpy (htab->elf.splt->contents, elf_x86_64_plt0_entry,
4501 /* Add offset for pushq GOT+8(%rip), since the instruction
4502 uses 6 bytes subtract this value. */
4503 bfd_put_32 (output_bfd,
4504 (htab->elf.sgotplt->output_section->vma
4505 + htab->elf.sgotplt->output_offset
4507 - htab->elf.splt->output_section->vma
4508 - htab->elf.splt->output_offset
4510 htab->elf.splt->contents + 2);
4511 /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to
4512 the end of the instruction. */
4513 bfd_put_32 (output_bfd,
4514 (htab->elf.sgotplt->output_section->vma
4515 + htab->elf.sgotplt->output_offset
4517 - htab->elf.splt->output_section->vma
4518 - htab->elf.splt->output_offset
4520 htab->elf.splt->contents + 8);
4522 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize =
4525 if (htab->tlsdesc_plt)
4527 bfd_put_64 (output_bfd, (bfd_vma) 0,
4528 htab->elf.sgot->contents + htab->tlsdesc_got);
4530 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
4531 elf_x86_64_plt0_entry,
4534 /* Add offset for pushq GOT+8(%rip), since the
4535 instruction uses 6 bytes subtract this value. */
4536 bfd_put_32 (output_bfd,
4537 (htab->elf.sgotplt->output_section->vma
4538 + htab->elf.sgotplt->output_offset
4540 - htab->elf.splt->output_section->vma
4541 - htab->elf.splt->output_offset
4544 htab->elf.splt->contents + htab->tlsdesc_plt + 2);
4545 /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for
4546 htab->tlsdesc_got. The 12 is the offset to the end of
4548 bfd_put_32 (output_bfd,
4549 (htab->elf.sgot->output_section->vma
4550 + htab->elf.sgot->output_offset
4552 - htab->elf.splt->output_section->vma
4553 - htab->elf.splt->output_offset
4556 htab->elf.splt->contents + htab->tlsdesc_plt + 8);
4561 if (htab->elf.sgotplt)
4563 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4565 (*_bfd_error_handler)
4566 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4570 /* Fill in the first three entries in the global offset table. */
4571 if (htab->elf.sgotplt->size > 0)
4573 /* Set the first entry in the global offset table to the address of
4574 the dynamic section. */
4576 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
4578 bfd_put_64 (output_bfd,
4579 sdyn->output_section->vma + sdyn->output_offset,
4580 htab->elf.sgotplt->contents);
4581 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4582 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
4583 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
4586 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
4590 /* Adjust .eh_frame for .plt section. */
4591 if (htab->plt_eh_frame != NULL)
4593 if (htab->elf.splt != NULL
4594 && htab->elf.splt->size != 0
4595 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4596 && htab->elf.splt->output_section != NULL
4597 && htab->plt_eh_frame->output_section != NULL)
4599 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4600 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4601 + htab->plt_eh_frame->output_offset
4602 + PLT_FDE_START_OFFSET;
4603 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4604 htab->plt_eh_frame->contents
4605 + PLT_FDE_START_OFFSET);
4607 if (htab->plt_eh_frame->sec_info_type
4608 == ELF_INFO_TYPE_EH_FRAME)
4610 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4612 htab->plt_eh_frame->contents))
4617 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4618 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
4621 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4622 htab_traverse (htab->loc_hash_table,
4623 elf_x86_64_finish_local_dynamic_symbol,
4629 /* Return address for Ith PLT stub in section PLT, for relocation REL
4630 or (bfd_vma) -1 if it should not be included. */
4633 elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
4634 const arelent *rel ATTRIBUTE_UNUSED)
4636 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4639 /* Handle an x86-64 specific section when reading an object file. This
4640 is called when elfcode.h finds a section with an unknown type. */
4643 elf_x86_64_section_from_shdr (bfd *abfd,
4644 Elf_Internal_Shdr *hdr,
4648 if (hdr->sh_type != SHT_X86_64_UNWIND)
4651 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
4657 /* Hook called by the linker routine which adds symbols from an object
4658 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4662 elf_x86_64_add_symbol_hook (bfd *abfd,
4663 struct bfd_link_info *info,
4664 Elf_Internal_Sym *sym,
4665 const char **namep ATTRIBUTE_UNUSED,
4666 flagword *flagsp ATTRIBUTE_UNUSED,
4672 switch (sym->st_shndx)
4674 case SHN_X86_64_LCOMMON:
4675 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
4678 lcomm = bfd_make_section_with_flags (abfd,
4682 | SEC_LINKER_CREATED));
4685 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
4688 *valp = sym->st_size;
4692 if ((abfd->flags & DYNAMIC) == 0
4693 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
4694 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
4695 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4701 /* Given a BFD section, try to locate the corresponding ELF section
4705 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
4706 asection *sec, int *index_return)
4708 if (sec == &_bfd_elf_large_com_section)
4710 *index_return = SHN_X86_64_LCOMMON;
4716 /* Process a symbol. */
4719 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
4722 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
4724 switch (elfsym->internal_elf_sym.st_shndx)
4726 case SHN_X86_64_LCOMMON:
4727 asym->section = &_bfd_elf_large_com_section;
4728 asym->value = elfsym->internal_elf_sym.st_size;
4729 /* Common symbol doesn't set BSF_GLOBAL. */
4730 asym->flags &= ~BSF_GLOBAL;
4736 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
4738 return (sym->st_shndx == SHN_COMMON
4739 || sym->st_shndx == SHN_X86_64_LCOMMON);
4743 elf_x86_64_common_section_index (asection *sec)
4745 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
4748 return SHN_X86_64_LCOMMON;
4752 elf_x86_64_common_section (asection *sec)
4754 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
4755 return bfd_com_section_ptr;
4757 return &_bfd_elf_large_com_section;
4761 elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
4762 struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED,
4763 struct elf_link_hash_entry *h,
4764 Elf_Internal_Sym *sym,
4766 bfd_vma *pvalue ATTRIBUTE_UNUSED,
4767 unsigned int *pold_alignment ATTRIBUTE_UNUSED,
4768 bfd_boolean *skip ATTRIBUTE_UNUSED,
4769 bfd_boolean *override ATTRIBUTE_UNUSED,
4770 bfd_boolean *type_change_ok ATTRIBUTE_UNUSED,
4771 bfd_boolean *size_change_ok ATTRIBUTE_UNUSED,
4772 bfd_boolean *newdyn ATTRIBUTE_UNUSED,
4773 bfd_boolean *newdef,
4774 bfd_boolean *newdyncommon ATTRIBUTE_UNUSED,
4775 bfd_boolean *newweak ATTRIBUTE_UNUSED,
4776 bfd *abfd ATTRIBUTE_UNUSED,
4778 bfd_boolean *olddyn ATTRIBUTE_UNUSED,
4779 bfd_boolean *olddef,
4780 bfd_boolean *olddyncommon ATTRIBUTE_UNUSED,
4781 bfd_boolean *oldweak ATTRIBUTE_UNUSED,
4785 /* A normal common symbol and a large common symbol result in a
4786 normal common symbol. We turn the large common symbol into a
4789 && h->root.type == bfd_link_hash_common
4791 && bfd_is_com_section (*sec)
4794 if (sym->st_shndx == SHN_COMMON
4795 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0)
4797 h->root.u.c.p->section
4798 = bfd_make_section_old_way (oldbfd, "COMMON");
4799 h->root.u.c.p->section->flags = SEC_ALLOC;
4801 else if (sym->st_shndx == SHN_X86_64_LCOMMON
4802 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0)
4803 *psec = *sec = bfd_com_section_ptr;
4810 elf_x86_64_additional_program_headers (bfd *abfd,
4811 struct bfd_link_info *info ATTRIBUTE_UNUSED)
4816 /* Check to see if we need a large readonly segment. */
4817 s = bfd_get_section_by_name (abfd, ".lrodata");
4818 if (s && (s->flags & SEC_LOAD))
4821 /* Check to see if we need a large data segment. Since .lbss sections
4822 is placed right after the .bss section, there should be no need for
4823 a large data segment just because of .lbss. */
4824 s = bfd_get_section_by_name (abfd, ".ldata");
4825 if (s && (s->flags & SEC_LOAD))
4831 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4834 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
4836 if (h->plt.offset != (bfd_vma) -1
4838 && !h->pointer_equality_needed)
4841 return _bfd_elf_hash_symbol (h);
4844 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
4847 elf_x86_64_relocs_compatible (const bfd_target *input,
4848 const bfd_target *output)
4850 return ((xvec_get_elf_backend_data (input)->s->elfclass
4851 == xvec_get_elf_backend_data (output)->s->elfclass)
4852 && _bfd_elf_relocs_compatible (input, output));
4855 static const struct bfd_elf_special_section
4856 elf_x86_64_special_sections[]=
4858 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
4859 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
4860 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
4861 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
4862 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
4863 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
4864 { NULL, 0, 0, 0, 0 }
4867 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
4868 #define TARGET_LITTLE_NAME "elf64-x86-64"
4869 #define ELF_ARCH bfd_arch_i386
4870 #define ELF_TARGET_ID X86_64_ELF_DATA
4871 #define ELF_MACHINE_CODE EM_X86_64
4872 #define ELF_MAXPAGESIZE 0x200000
4873 #define ELF_MINPAGESIZE 0x1000
4874 #define ELF_COMMONPAGESIZE 0x1000
4876 #define elf_backend_can_gc_sections 1
4877 #define elf_backend_can_refcount 1
4878 #define elf_backend_want_got_plt 1
4879 #define elf_backend_plt_readonly 1
4880 #define elf_backend_want_plt_sym 0
4881 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
4882 #define elf_backend_rela_normal 1
4883 #define elf_backend_plt_alignment 4
4885 #define elf_info_to_howto elf_x86_64_info_to_howto
4887 #define bfd_elf64_bfd_link_hash_table_create \
4888 elf_x86_64_link_hash_table_create
4889 #define bfd_elf64_bfd_link_hash_table_free \
4890 elf_x86_64_link_hash_table_free
4891 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
4892 #define bfd_elf64_bfd_reloc_name_lookup \
4893 elf_x86_64_reloc_name_lookup
4895 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
4896 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
4897 #define elf_backend_check_relocs elf_x86_64_check_relocs
4898 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
4899 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
4900 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
4901 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
4902 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
4903 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
4904 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
4905 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
4907 #define elf_backend_write_core_note elf_x86_64_write_core_note
4909 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
4910 #define elf_backend_relocate_section elf_x86_64_relocate_section
4911 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
4912 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
4913 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4914 #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
4915 #define elf_backend_object_p elf64_x86_64_elf_object_p
4916 #define bfd_elf64_mkobject elf_x86_64_mkobject
4918 #define elf_backend_section_from_shdr \
4919 elf_x86_64_section_from_shdr
4921 #define elf_backend_section_from_bfd_section \
4922 elf_x86_64_elf_section_from_bfd_section
4923 #define elf_backend_add_symbol_hook \
4924 elf_x86_64_add_symbol_hook
4925 #define elf_backend_symbol_processing \
4926 elf_x86_64_symbol_processing
4927 #define elf_backend_common_section_index \
4928 elf_x86_64_common_section_index
4929 #define elf_backend_common_section \
4930 elf_x86_64_common_section
4931 #define elf_backend_common_definition \
4932 elf_x86_64_common_definition
4933 #define elf_backend_merge_symbol \
4934 elf_x86_64_merge_symbol
4935 #define elf_backend_special_sections \
4936 elf_x86_64_special_sections
4937 #define elf_backend_additional_program_headers \
4938 elf_x86_64_additional_program_headers
4939 #define elf_backend_hash_symbol \
4940 elf_x86_64_hash_symbol
4942 #undef elf_backend_post_process_headers
4943 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4945 #include "elf64-target.h"
4947 /* FreeBSD support. */
4949 #undef TARGET_LITTLE_SYM
4950 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
4951 #undef TARGET_LITTLE_NAME
4952 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
4955 #define ELF_OSABI ELFOSABI_FREEBSD
4958 #define elf64_bed elf64_x86_64_fbsd_bed
4960 #include "elf64-target.h"
4962 /* Solaris 2 support. */
4964 #undef TARGET_LITTLE_SYM
4965 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
4966 #undef TARGET_LITTLE_NAME
4967 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
4969 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4970 objects won't be recognized. */
4974 #define elf64_bed elf64_x86_64_sol2_bed
4976 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
4978 #undef elf_backend_static_tls_alignment
4979 #define elf_backend_static_tls_alignment 16
4981 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4983 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4985 #undef elf_backend_want_plt_sym
4986 #define elf_backend_want_plt_sym 1
4988 #include "elf64-target.h"
4990 /* Intel L1OM support. */
4993 elf64_l1om_elf_object_p (bfd *abfd)
4995 /* Set the right machine number for an L1OM elf64 file. */
4996 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5000 #undef TARGET_LITTLE_SYM
5001 #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5002 #undef TARGET_LITTLE_NAME
5003 #define TARGET_LITTLE_NAME "elf64-l1om"
5005 #define ELF_ARCH bfd_arch_l1om
5007 #undef ELF_MACHINE_CODE
5008 #define ELF_MACHINE_CODE EM_L1OM
5013 #define elf64_bed elf64_l1om_bed
5015 #undef elf_backend_object_p
5016 #define elf_backend_object_p elf64_l1om_elf_object_p
5018 #undef elf_backend_post_process_headers
5019 #undef elf_backend_static_tls_alignment
5021 #undef elf_backend_want_plt_sym
5022 #define elf_backend_want_plt_sym 0
5024 #include "elf64-target.h"
5026 /* FreeBSD L1OM support. */
5028 #undef TARGET_LITTLE_SYM
5029 #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5030 #undef TARGET_LITTLE_NAME
5031 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5034 #define ELF_OSABI ELFOSABI_FREEBSD
5037 #define elf64_bed elf64_l1om_fbsd_bed
5039 #undef elf_backend_post_process_headers
5040 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5042 #include "elf64-target.h"
5044 /* 32bit x86-64 support. */
5047 elf32_x86_64_elf_object_p (bfd *abfd)
5049 /* Set the right machine number for an x86-64 elf32 file. */
5050 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
5054 #undef TARGET_LITTLE_SYM
5055 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5056 #undef TARGET_LITTLE_NAME
5057 #define TARGET_LITTLE_NAME "elf32-x86-64"
5060 #define ELF_ARCH bfd_arch_i386
5062 #undef ELF_MACHINE_CODE
5063 #define ELF_MACHINE_CODE EM_X86_64
5065 #define bfd_elf32_bfd_link_hash_table_create \
5066 elf_x86_64_link_hash_table_create
5067 #define bfd_elf32_bfd_link_hash_table_free \
5068 elf_x86_64_link_hash_table_free
5069 #define bfd_elf32_bfd_reloc_type_lookup \
5070 elf_x86_64_reloc_type_lookup
5071 #define bfd_elf32_bfd_reloc_name_lookup \
5072 elf_x86_64_reloc_name_lookup
5073 #define bfd_elf32_mkobject \
5078 #undef elf_backend_post_process_headers
5080 #undef elf_backend_object_p
5081 #define elf_backend_object_p \
5082 elf32_x86_64_elf_object_p
5084 #undef elf_backend_bfd_from_remote_memory
5085 #define elf_backend_bfd_from_remote_memory \
5086 _bfd_elf32_bfd_from_remote_memory
5088 #undef elf_backend_size_info
5089 #define elf_backend_size_info \
5090 _bfd_elf32_size_info
5092 #undef elf_backend_post_process_headers
5093 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5095 #include "elf32-target.h"