1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka <jh@suse.cz>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #include "bfd_stdint.h"
32 #include "libiberty.h"
34 #include "opcode/i386.h"
35 #include "elf/x86-64.h"
42 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
43 #define MINUS_ONE (~ (bfd_vma) 0)
45 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
46 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
47 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
48 since they are the same. */
50 #define ABI_64_P(abfd) \
51 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
53 /* The relocation "howto" table. Order of fields:
54 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
55 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
56 static reloc_howto_type x86_64_elf_howto_table[] =
58 HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
59 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
61 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
64 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
65 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
67 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
68 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
70 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
71 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
73 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
76 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
79 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
82 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
85 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
86 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
88 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
89 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
91 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
92 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
94 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
96 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
98 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
100 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
101 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
102 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
105 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
108 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
111 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
112 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
114 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
115 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
117 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
118 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
120 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
121 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
123 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
124 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
126 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
129 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
131 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
132 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
133 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
134 FALSE, 0xffffffff, 0xffffffff, TRUE),
135 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
136 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
138 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
139 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
141 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
142 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
143 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
144 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
145 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
147 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
148 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
150 HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
151 bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
153 HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
154 bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
156 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
157 complain_overflow_bitfield, bfd_elf_generic_reloc,
158 "R_X86_64_GOTPC32_TLSDESC",
159 FALSE, 0xffffffff, 0xffffffff, TRUE),
160 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
161 complain_overflow_dont, bfd_elf_generic_reloc,
162 "R_X86_64_TLSDESC_CALL",
164 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
165 complain_overflow_bitfield, bfd_elf_generic_reloc,
167 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
168 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
171 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
172 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
174 HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
175 bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
177 HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
178 bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
180 HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
181 bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff,
183 HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
184 bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff,
187 /* We have a gap in the reloc numbers here.
188 R_X86_64_standard counts the number up to this point, and
189 R_X86_64_vt_offset is the value to subtract from a reloc type of
190 R_X86_64_GNU_VT* to form an index into this table. */
191 #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
192 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
194 /* GNU extension to record C++ vtable hierarchy. */
195 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
196 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
198 /* GNU extension to record C++ vtable member usage. */
199 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
200 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
203 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
204 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
205 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
209 #define IS_X86_64_PCREL_TYPE(TYPE) \
210 ( ((TYPE) == R_X86_64_PC8) \
211 || ((TYPE) == R_X86_64_PC16) \
212 || ((TYPE) == R_X86_64_PC32) \
213 || ((TYPE) == R_X86_64_PC32_BND) \
214 || ((TYPE) == R_X86_64_PC64))
216 /* Map BFD relocs to the x86_64 elf relocs. */
219 bfd_reloc_code_real_type bfd_reloc_val;
220 unsigned char elf_reloc_val;
223 static const struct elf_reloc_map x86_64_reloc_map[] =
225 { BFD_RELOC_NONE, R_X86_64_NONE, },
226 { BFD_RELOC_64, R_X86_64_64, },
227 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
228 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
229 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
230 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
231 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
232 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
233 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
234 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
235 { BFD_RELOC_32, R_X86_64_32, },
236 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
237 { BFD_RELOC_16, R_X86_64_16, },
238 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
239 { BFD_RELOC_8, R_X86_64_8, },
240 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
241 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
242 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
243 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
244 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
245 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
246 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
247 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
248 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
249 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
250 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
251 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
252 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
253 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
254 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
255 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
256 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
257 { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
258 { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
259 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
260 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
261 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
262 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
263 { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, },
264 { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, },
265 { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, },
266 { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, },
267 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
268 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
271 static reloc_howto_type *
272 elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
276 if (r_type == (unsigned int) R_X86_64_32)
281 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
283 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
284 || r_type >= (unsigned int) R_X86_64_max)
286 if (r_type >= (unsigned int) R_X86_64_standard)
288 /* xgettext:c-format */
289 _bfd_error_handler (_("%B: invalid relocation type %d"),
291 r_type = R_X86_64_NONE;
296 i = r_type - (unsigned int) R_X86_64_vt_offset;
297 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
298 return &x86_64_elf_howto_table[i];
301 /* Given a BFD reloc type, return a HOWTO structure. */
302 static reloc_howto_type *
303 elf_x86_64_reloc_type_lookup (bfd *abfd,
304 bfd_reloc_code_real_type code)
308 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
311 if (x86_64_reloc_map[i].bfd_reloc_val == code)
312 return elf_x86_64_rtype_to_howto (abfd,
313 x86_64_reloc_map[i].elf_reloc_val);
318 static reloc_howto_type *
319 elf_x86_64_reloc_name_lookup (bfd *abfd,
324 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
326 /* Get x32 R_X86_64_32. */
327 reloc_howto_type *reloc
328 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
329 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
333 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
334 if (x86_64_elf_howto_table[i].name != NULL
335 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
336 return &x86_64_elf_howto_table[i];
341 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
344 elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
345 Elf_Internal_Rela *dst)
349 r_type = ELF32_R_TYPE (dst->r_info);
350 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
351 BFD_ASSERT (r_type == cache_ptr->howto->type);
354 /* Support for core dump NOTE sections. */
356 elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
361 switch (note->descsz)
366 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
368 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
371 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
379 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
381 elf_tdata (abfd)->core->signal
382 = bfd_get_16 (abfd, note->descdata + 12);
385 elf_tdata (abfd)->core->lwpid
386 = bfd_get_32 (abfd, note->descdata + 32);
395 /* Make a ".reg/999" section. */
396 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
397 size, note->descpos + offset);
401 elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
403 switch (note->descsz)
408 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
409 elf_tdata (abfd)->core->pid
410 = bfd_get_32 (abfd, note->descdata + 12);
411 elf_tdata (abfd)->core->program
412 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
413 elf_tdata (abfd)->core->command
414 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
417 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
418 elf_tdata (abfd)->core->pid
419 = bfd_get_32 (abfd, note->descdata + 24);
420 elf_tdata (abfd)->core->program
421 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
422 elf_tdata (abfd)->core->command
423 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
426 /* Note that for some reason, a spurious space is tacked
427 onto the end of the args in some (at least one anyway)
428 implementations, so strip it off if it exists. */
431 char *command = elf_tdata (abfd)->core->command;
432 int n = strlen (command);
434 if (0 < n && command[n - 1] == ' ')
435 command[n - 1] = '\0';
443 elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
446 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
448 const char *fname, *psargs;
459 va_start (ap, note_type);
460 fname = va_arg (ap, const char *);
461 psargs = va_arg (ap, const char *);
464 if (bed->s->elfclass == ELFCLASS32)
467 memset (&data, 0, sizeof (data));
468 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
469 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
470 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
471 &data, sizeof (data));
476 memset (&data, 0, sizeof (data));
477 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
478 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
479 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
480 &data, sizeof (data));
485 va_start (ap, note_type);
486 pid = va_arg (ap, long);
487 cursig = va_arg (ap, int);
488 gregs = va_arg (ap, const void *);
491 if (bed->s->elfclass == ELFCLASS32)
493 if (bed->elf_machine_code == EM_X86_64)
495 prstatusx32_t prstat;
496 memset (&prstat, 0, sizeof (prstat));
498 prstat.pr_cursig = cursig;
499 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
500 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
501 &prstat, sizeof (prstat));
506 memset (&prstat, 0, sizeof (prstat));
508 prstat.pr_cursig = cursig;
509 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
510 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
511 &prstat, sizeof (prstat));
517 memset (&prstat, 0, sizeof (prstat));
519 prstat.pr_cursig = cursig;
520 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
521 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
522 &prstat, sizeof (prstat));
529 /* Functions for the x86-64 ELF linker. */
531 /* The name of the dynamic interpreter. This is put in the .interp
534 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
535 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
537 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
538 copying dynamic variables from a shared lib into an app's dynbss
539 section, and instead use a dynamic relocation to point into the
541 #define ELIMINATE_COPY_RELOCS 1
543 /* The size in bytes of an entry in the global offset table. */
545 #define GOT_ENTRY_SIZE 8
547 /* The size in bytes of an entry in the lazy procedure linkage table. */
549 #define LAZY_PLT_ENTRY_SIZE 16
551 /* The size in bytes of an entry in the non-lazy procedure linkage
554 #define NON_LAZY_PLT_ENTRY_SIZE 8
556 /* The first entry in a lazy procedure linkage table looks like this.
557 See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this
560 static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
562 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
563 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
564 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
567 /* Subsequent entries in a lazy procedure linkage table look like this. */
569 static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
571 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
572 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
573 0x68, /* pushq immediate */
574 0, 0, 0, 0, /* replaced with index into relocation table. */
575 0xe9, /* jmp relative */
576 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
579 /* The first entry in a lazy procedure linkage table with BND prefix
582 static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
584 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
585 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
586 0x0f, 0x1f, 0 /* nopl (%rax) */
589 /* Subsequent entries for branches with BND prefx in a lazy procedure
590 linkage table look like this. */
592 static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] =
594 0x68, 0, 0, 0, 0, /* pushq immediate */
595 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
596 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
599 /* The first entry in the IBT-enabled lazy procedure linkage table is the
600 the same as the lazy PLT with BND prefix so that bound registers are
601 preserved when control is passed to dynamic linker. Subsequent
602 entries for a IBT-enabled lazy procedure linkage table look like
605 static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
607 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
608 0x68, 0, 0, 0, 0, /* pushq immediate */
609 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
613 /* The first entry in the x32 IBT-enabled lazy procedure linkage table
614 is the the same as the normal lazy PLT. Subsequent entries for an
615 x32 IBT-enabled lazy procedure linkage table look like this. */
617 static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
619 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
620 0x68, 0, 0, 0, 0, /* pushq immediate */
621 0xe9, 0, 0, 0, 0, /* jmpq relative */
622 0x66, 0x90 /* xchg %ax,%ax */
625 /* Entries in the non-lazey procedure linkage table look like this. */
627 static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
629 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
630 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
631 0x66, 0x90 /* xchg %ax,%ax */
634 /* Entries for branches with BND prefix in the non-lazey procedure
635 linkage table look like this. */
637 static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
639 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
640 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
644 /* Entries for branches with IBT-enabled in the non-lazey procedure
645 linkage table look like this. They have the same size as the lazy
648 static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
650 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
651 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
652 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
653 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */
656 /* Entries for branches with IBT-enabled in the x32 non-lazey procedure
657 linkage table look like this. They have the same size as the lazy
660 static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
662 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
663 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
664 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
665 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
668 /* .eh_frame covering the lazy .plt section. */
670 static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] =
672 #define PLT_CIE_LENGTH 20
673 #define PLT_FDE_LENGTH 36
674 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
675 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
676 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
677 0, 0, 0, 0, /* CIE ID */
679 'z', 'R', 0, /* Augmentation string */
680 1, /* Code alignment factor */
681 0x78, /* Data alignment factor */
682 16, /* Return address column */
683 1, /* Augmentation size */
684 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
685 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
686 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
687 DW_CFA_nop, DW_CFA_nop,
689 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
690 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
691 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
692 0, 0, 0, 0, /* .plt size goes here */
693 0, /* Augmentation size */
694 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
695 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
696 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
697 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
698 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
699 11, /* Block length */
700 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
701 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
702 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
703 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
704 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
707 /* .eh_frame covering the lazy BND .plt section. */
709 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] =
711 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
712 0, 0, 0, 0, /* CIE ID */
714 'z', 'R', 0, /* Augmentation string */
715 1, /* Code alignment factor */
716 0x78, /* Data alignment factor */
717 16, /* Return address column */
718 1, /* Augmentation size */
719 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
720 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
721 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
722 DW_CFA_nop, DW_CFA_nop,
724 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
725 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
726 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
727 0, 0, 0, 0, /* .plt size goes here */
728 0, /* Augmentation size */
729 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
730 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
731 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
732 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
733 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
734 11, /* Block length */
735 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
736 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
737 DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge,
738 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
739 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
742 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
744 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] =
746 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
747 0, 0, 0, 0, /* CIE ID */
749 'z', 'R', 0, /* Augmentation string */
750 1, /* Code alignment factor */
751 0x78, /* Data alignment factor */
752 16, /* Return address column */
753 1, /* Augmentation size */
754 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
755 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
756 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
757 DW_CFA_nop, DW_CFA_nop,
759 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
760 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
761 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
762 0, 0, 0, 0, /* .plt size goes here */
763 0, /* Augmentation size */
764 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
765 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
766 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
767 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
768 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
769 11, /* Block length */
770 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
771 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
772 DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge,
773 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
774 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
777 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
779 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] =
781 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
782 0, 0, 0, 0, /* CIE ID */
784 'z', 'R', 0, /* Augmentation string */
785 1, /* Code alignment factor */
786 0x78, /* Data alignment factor */
787 16, /* Return address column */
788 1, /* Augmentation size */
789 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
790 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
791 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
792 DW_CFA_nop, DW_CFA_nop,
794 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
795 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
796 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
797 0, 0, 0, 0, /* .plt size goes here */
798 0, /* Augmentation size */
799 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
800 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
801 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
802 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
803 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
804 11, /* Block length */
805 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
806 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
807 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
808 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
809 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
812 /* .eh_frame covering the non-lazy .plt section. */
814 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] =
816 #define PLT_GOT_FDE_LENGTH 20
817 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
818 0, 0, 0, 0, /* CIE ID */
820 'z', 'R', 0, /* Augmentation string */
821 1, /* Code alignment factor */
822 0x78, /* Data alignment factor */
823 16, /* Return address column */
824 1, /* Augmentation size */
825 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
826 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
827 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
828 DW_CFA_nop, DW_CFA_nop,
830 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
831 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
832 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
833 0, 0, 0, 0, /* non-lazy .plt size goes here */
834 0, /* Augmentation size */
835 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop,
836 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
839 struct elf_x86_64_lazy_plt_layout
841 /* Templates for the initial PLT entry and for subsequent entries. */
842 const bfd_byte *plt0_entry;
843 const bfd_byte *plt_entry;
844 unsigned int plt_entry_size; /* Size of each PLT entry. */
846 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
847 unsigned int plt0_got1_offset;
848 unsigned int plt0_got2_offset;
850 /* Offset of the end of the PC-relative instruction containing
852 unsigned int plt0_got2_insn_end;
854 /* Offsets into plt_entry that are to be replaced with... */
855 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
856 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
857 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
859 /* Length of the PC-relative instruction containing plt_got_offset. */
860 unsigned int plt_got_insn_size;
862 /* Offset of the end of the PC-relative jump to plt0_entry. */
863 unsigned int plt_plt_insn_end;
865 /* Offset into plt_entry where the initial value of the GOT entry points. */
866 unsigned int plt_lazy_offset;
868 /* .eh_frame covering the lazy .plt section. */
869 const bfd_byte *eh_frame_plt;
870 unsigned int eh_frame_plt_size;
873 struct elf_x86_64_non_lazy_plt_layout
875 /* Template for the lazy PLT entries. */
876 const bfd_byte *plt_entry;
877 unsigned int plt_entry_size; /* Size of each PLT entry. */
879 /* Offsets into plt_entry that are to be replaced with... */
880 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
882 /* Length of the PC-relative instruction containing plt_got_offset. */
883 unsigned int plt_got_insn_size;
885 /* .eh_frame covering the non-lazy .plt section. */
886 const bfd_byte *eh_frame_plt;
887 unsigned int eh_frame_plt_size;
890 struct elf_x86_64_plt_layout
892 /* Template for the PLT entries. */
893 const bfd_byte *plt_entry;
894 unsigned int plt_entry_size; /* Size of each PLT entry. */
897 unsigned int has_plt0;
899 /* Offsets into plt_entry that are to be replaced with... */
900 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
902 /* Length of the PC-relative instruction containing plt_got_offset. */
903 unsigned int plt_got_insn_size;
905 /* .eh_frame covering the .plt section. */
906 const bfd_byte *eh_frame_plt;
907 unsigned int eh_frame_plt_size;
910 /* Architecture-specific backend data for x86-64. */
912 struct elf_x86_64_backend_data
922 #define get_elf_x86_64_arch_data(bed) \
923 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
925 #define get_elf_x86_64_backend_data(abfd) \
926 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
928 /* These are the standard parameters. */
929 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_plt =
931 elf_x86_64_lazy_plt0_entry, /* plt0_entry */
932 elf_x86_64_lazy_plt_entry, /* plt_entry */
933 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
934 2, /* plt0_got1_offset */
935 8, /* plt0_got2_offset */
936 12, /* plt0_got2_insn_end */
937 2, /* plt_got_offset */
938 7, /* plt_reloc_offset */
939 12, /* plt_plt_offset */
940 6, /* plt_got_insn_size */
941 LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */
942 6, /* plt_lazy_offset */
943 elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */
944 sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */
947 static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_plt =
949 elf_x86_64_non_lazy_plt_entry, /* plt_entry */
950 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
951 2, /* plt_got_offset */
952 6, /* plt_got_insn_size */
953 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
954 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
957 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_bnd_plt =
959 elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
960 elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */
961 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
962 2, /* plt0_got1_offset */
963 1+8, /* plt0_got2_offset */
964 1+12, /* plt0_got2_insn_end */
965 1+2, /* plt_got_offset */
966 1, /* plt_reloc_offset */
967 7, /* plt_plt_offset */
968 1+6, /* plt_got_insn_size */
969 11, /* plt_plt_insn_end */
970 0, /* plt_lazy_offset */
971 elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */
972 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */
975 static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt =
977 elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */
978 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
979 1+2, /* plt_got_offset */
980 1+6, /* plt_got_insn_size */
981 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
982 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
985 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_ibt_plt =
987 elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
988 elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */
989 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
990 2, /* plt0_got1_offset */
991 1+8, /* plt0_got2_offset */
992 1+12, /* plt0_got2_insn_end */
993 4+1+2, /* plt_got_offset */
994 4+1, /* plt_reloc_offset */
995 4+1+6, /* plt_plt_offset */
996 4+1+6, /* plt_got_insn_size */
997 4+1+5+5, /* plt_plt_insn_end */
998 0, /* plt_lazy_offset */
999 elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
1000 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
1003 static const struct elf_x86_64_lazy_plt_layout elf_x32_lazy_ibt_plt =
1005 elf_x86_64_lazy_plt0_entry, /* plt0_entry */
1006 elf_x32_lazy_ibt_plt_entry, /* plt_entry */
1007 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
1008 2, /* plt0_got1_offset */
1009 8, /* plt0_got2_offset */
1010 12, /* plt0_got2_insn_end */
1011 4+2, /* plt_got_offset */
1012 4+1, /* plt_reloc_offset */
1013 4+6, /* plt_plt_offset */
1014 4+6, /* plt_got_insn_size */
1015 4+5+5, /* plt_plt_insn_end */
1016 0, /* plt_lazy_offset */
1017 elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
1018 sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
1021 static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt =
1023 elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */
1024 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
1025 4+1+2, /* plt_got_offset */
1026 4+1+6, /* plt_got_insn_size */
1027 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
1028 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
1031 static const struct elf_x86_64_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt =
1033 elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */
1034 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
1035 4+2, /* plt_got_offset */
1036 4+6, /* plt_got_insn_size */
1037 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
1038 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
1041 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
1046 #define elf_backend_arch_data &elf_x86_64_arch_bed
1048 /* Is a undefined weak symbol which is resolved to 0. Reference to an
1049 undefined weak symbol is resolved to 0 when building executable if
1050 it isn't dynamic and
1051 1. Has non-GOT/non-PLT relocations in text section. Or
1052 2. Has no GOT/PLT relocation.
1054 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
1055 ((EH)->elf.root.type == bfd_link_hash_undefweak \
1056 && bfd_link_executable (INFO) \
1057 && (elf_x86_64_hash_table (INFO)->interp == NULL \
1059 || (EH)->has_non_got_reloc \
1060 || !(INFO)->dynamic_undefined_weak))
1062 /* x86-64 ELF linker hash entry. */
1064 struct elf_x86_64_link_hash_entry
1066 struct elf_link_hash_entry elf;
1068 /* Track dynamic relocs copied for this symbol. */
1069 struct elf_dyn_relocs *dyn_relocs;
1071 #define GOT_UNKNOWN 0
1072 #define GOT_NORMAL 1
1073 #define GOT_TLS_GD 2
1074 #define GOT_TLS_IE 3
1075 #define GOT_TLS_GDESC 4
1076 #define GOT_TLS_GD_BOTH_P(type) \
1077 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
1078 #define GOT_TLS_GD_P(type) \
1079 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
1080 #define GOT_TLS_GDESC_P(type) \
1081 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
1082 #define GOT_TLS_GD_ANY_P(type) \
1083 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
1084 unsigned char tls_type;
1086 /* TRUE if a weak symbol with a real definition needs a copy reloc.
1087 When there is a weak symbol with a real definition, the processor
1088 independent code will have arranged for us to see the real
1089 definition first. We need to copy the needs_copy bit from the
1090 real definition and check it when allowing copy reloc in PIE. */
1091 unsigned int needs_copy : 1;
1093 /* TRUE if symbol has GOT or PLT relocations. */
1094 unsigned int has_got_reloc : 1;
1096 /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */
1097 unsigned int has_non_got_reloc : 1;
1099 /* Don't call finish_dynamic_symbol on this symbol. */
1100 unsigned int no_finish_dynamic_symbol : 1;
1102 /* 0: symbol isn't __tls_get_addr.
1103 1: symbol is __tls_get_addr.
1104 2: symbol is unknown. */
1105 unsigned int tls_get_addr : 2;
1107 /* Reference count of C/C++ function pointer relocations in read-write
1108 section which can be resolved at run-time. */
1109 bfd_signed_vma func_pointer_refcount;
1111 /* Information about the GOT PLT entry. Filled when there are both
1112 GOT and PLT relocations against the same function. */
1113 union gotplt_union plt_got;
1115 /* Information about the second PLT entry. */
1116 union gotplt_union plt_second;
1118 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
1119 starting at the end of the jump table. */
1120 bfd_vma tlsdesc_got;
1123 #define elf_x86_64_hash_entry(ent) \
1124 ((struct elf_x86_64_link_hash_entry *)(ent))
1126 struct elf_x86_64_obj_tdata
1128 struct elf_obj_tdata root;
1130 /* tls_type for each local got entry. */
1131 char *local_got_tls_type;
1133 /* GOTPLT entries for TLS descriptors. */
1134 bfd_vma *local_tlsdesc_gotent;
1137 #define elf_x86_64_tdata(abfd) \
1138 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
1140 #define elf_x86_64_local_got_tls_type(abfd) \
1141 (elf_x86_64_tdata (abfd)->local_got_tls_type)
1143 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
1144 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
1146 #define is_x86_64_elf(bfd) \
1147 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1148 && elf_tdata (bfd) != NULL \
1149 && elf_object_id (bfd) == X86_64_ELF_DATA)
1152 elf_x86_64_mkobject (bfd *abfd)
1154 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
1158 /* x86-64 ELF linker hash table. */
1160 struct elf_x86_64_link_hash_table
1162 struct elf_link_hash_table elf;
1164 /* Short-cuts to get to dynamic linker sections. */
1166 asection *plt_eh_frame;
1167 asection *plt_second;
1168 asection *plt_second_eh_frame;
1170 asection *plt_got_eh_frame;
1172 /* Parameters describing PLT generation, lazy or non-lazy. */
1173 struct elf_x86_64_plt_layout plt;
1175 /* Parameters describing lazy PLT generation. */
1176 const struct elf_x86_64_lazy_plt_layout *lazy_plt;
1178 /* Parameters describing non-lazy PLT generation. */
1179 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt;
1183 bfd_signed_vma refcount;
1187 /* The amount of space used by the jump slots in the GOT. */
1188 bfd_vma sgotplt_jump_table_size;
1190 /* Small local sym cache. */
1191 struct sym_cache sym_cache;
1193 bfd_vma (*r_info) (bfd_vma, bfd_vma);
1194 bfd_vma (*r_sym) (bfd_vma);
1195 unsigned int pointer_r_type;
1196 const char *dynamic_interpreter;
1197 int dynamic_interpreter_size;
1199 /* _TLS_MODULE_BASE_ symbol. */
1200 struct bfd_link_hash_entry *tls_module_base;
1202 /* Used by local STT_GNU_IFUNC symbols. */
1203 htab_t loc_hash_table;
1204 void * loc_hash_memory;
1206 /* The offset into splt of the PLT entry for the TLS descriptor
1207 resolver. Special values are 0, if not necessary (or not found
1208 to be necessary yet), and -1 if needed but not determined
1210 bfd_vma tlsdesc_plt;
1211 /* The offset into sgot of the GOT entry used by the PLT entry
1213 bfd_vma tlsdesc_got;
1215 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
1216 bfd_vma next_jump_slot_index;
1217 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
1218 bfd_vma next_irelative_index;
1220 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
1221 to read-only sections. */
1222 bfd_boolean readonly_dynrelocs_against_ifunc;
1225 /* Get the x86-64 ELF linker hash table from a link_info structure. */
1227 #define elf_x86_64_hash_table(p) \
1228 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
1229 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
1231 #define elf_x86_64_compute_jump_table_size(htab) \
1232 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
1234 /* Create an entry in an x86-64 ELF linker hash table. */
1236 static struct bfd_hash_entry *
1237 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
1238 struct bfd_hash_table *table,
1241 /* Allocate the structure if it has not already been allocated by a
1245 entry = (struct bfd_hash_entry *)
1246 bfd_hash_allocate (table,
1247 sizeof (struct elf_x86_64_link_hash_entry));
1252 /* Call the allocation method of the superclass. */
1253 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1256 struct elf_x86_64_link_hash_entry *eh;
1258 eh = (struct elf_x86_64_link_hash_entry *) entry;
1259 eh->dyn_relocs = NULL;
1260 eh->tls_type = GOT_UNKNOWN;
1262 eh->has_got_reloc = 0;
1263 eh->has_non_got_reloc = 0;
1264 eh->no_finish_dynamic_symbol = 0;
1265 eh->tls_get_addr = 2;
1266 eh->func_pointer_refcount = 0;
1267 eh->plt_second.offset = (bfd_vma) -1;
1268 eh->plt_got.offset = (bfd_vma) -1;
1269 eh->tlsdesc_got = (bfd_vma) -1;
1275 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1276 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1277 as global symbol. We reuse indx and dynstr_index for local symbol
1278 hash since they aren't used by global symbols in this backend. */
1281 elf_x86_64_local_htab_hash (const void *ptr)
1283 struct elf_link_hash_entry *h
1284 = (struct elf_link_hash_entry *) ptr;
1285 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1288 /* Compare local hash entries. */
1291 elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
1293 struct elf_link_hash_entry *h1
1294 = (struct elf_link_hash_entry *) ptr1;
1295 struct elf_link_hash_entry *h2
1296 = (struct elf_link_hash_entry *) ptr2;
1298 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
1301 /* Find and/or create a hash entry for local symbol. */
1303 static struct elf_link_hash_entry *
1304 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
1305 bfd *abfd, const Elf_Internal_Rela *rel,
1308 struct elf_x86_64_link_hash_entry e, *ret;
1309 asection *sec = abfd->sections;
1310 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
1311 htab->r_sym (rel->r_info));
1314 e.elf.indx = sec->id;
1315 e.elf.dynstr_index = htab->r_sym (rel->r_info);
1316 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
1317 create ? INSERT : NO_INSERT);
1324 ret = (struct elf_x86_64_link_hash_entry *) *slot;
1328 ret = (struct elf_x86_64_link_hash_entry *)
1329 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
1330 sizeof (struct elf_x86_64_link_hash_entry));
1333 memset (ret, 0, sizeof (*ret));
1334 ret->elf.indx = sec->id;
1335 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
1336 ret->elf.dynindx = -1;
1337 ret->func_pointer_refcount = 0;
1338 ret->plt_got.offset = (bfd_vma) -1;
1344 /* Destroy an X86-64 ELF linker hash table. */
1347 elf_x86_64_link_hash_table_free (bfd *obfd)
1349 struct elf_x86_64_link_hash_table *htab
1350 = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
1352 if (htab->loc_hash_table)
1353 htab_delete (htab->loc_hash_table);
1354 if (htab->loc_hash_memory)
1355 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1356 _bfd_elf_link_hash_table_free (obfd);
1359 /* Create an X86-64 ELF linker hash table. */
1361 static struct bfd_link_hash_table *
1362 elf_x86_64_link_hash_table_create (bfd *abfd)
1364 struct elf_x86_64_link_hash_table *ret;
1365 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
1367 ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
1371 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1372 elf_x86_64_link_hash_newfunc,
1373 sizeof (struct elf_x86_64_link_hash_entry),
1380 if (ABI_64_P (abfd))
1382 ret->r_info = elf64_r_info;
1383 ret->r_sym = elf64_r_sym;
1384 ret->pointer_r_type = R_X86_64_64;
1385 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1386 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1390 ret->r_info = elf32_r_info;
1391 ret->r_sym = elf32_r_sym;
1392 ret->pointer_r_type = R_X86_64_32;
1393 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1394 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1397 ret->loc_hash_table = htab_try_create (1024,
1398 elf_x86_64_local_htab_hash,
1399 elf_x86_64_local_htab_eq,
1401 ret->loc_hash_memory = objalloc_create ();
1402 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1404 elf_x86_64_link_hash_table_free (abfd);
1407 ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
1409 return &ret->elf.root;
1412 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1415 elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1416 struct elf_link_hash_entry *dir,
1417 struct elf_link_hash_entry *ind)
1419 struct elf_x86_64_link_hash_entry *edir, *eind;
1421 edir = (struct elf_x86_64_link_hash_entry *) dir;
1422 eind = (struct elf_x86_64_link_hash_entry *) ind;
1424 edir->has_got_reloc |= eind->has_got_reloc;
1425 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1427 if (eind->dyn_relocs != NULL)
1429 if (edir->dyn_relocs != NULL)
1431 struct elf_dyn_relocs **pp;
1432 struct elf_dyn_relocs *p;
1434 /* Add reloc counts against the indirect sym to the direct sym
1435 list. Merge any entries against the same section. */
1436 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1438 struct elf_dyn_relocs *q;
1440 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1441 if (q->sec == p->sec)
1443 q->pc_count += p->pc_count;
1444 q->count += p->count;
1451 *pp = edir->dyn_relocs;
1454 edir->dyn_relocs = eind->dyn_relocs;
1455 eind->dyn_relocs = NULL;
1458 if (ind->root.type == bfd_link_hash_indirect
1459 && dir->got.refcount <= 0)
1461 edir->tls_type = eind->tls_type;
1462 eind->tls_type = GOT_UNKNOWN;
1465 if (ELIMINATE_COPY_RELOCS
1466 && ind->root.type != bfd_link_hash_indirect
1467 && dir->dynamic_adjusted)
1469 /* If called to transfer flags for a weakdef during processing
1470 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1471 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1472 if (dir->versioned != versioned_hidden)
1473 dir->ref_dynamic |= ind->ref_dynamic;
1474 dir->ref_regular |= ind->ref_regular;
1475 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1476 dir->needs_plt |= ind->needs_plt;
1477 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1481 if (eind->func_pointer_refcount > 0)
1483 edir->func_pointer_refcount += eind->func_pointer_refcount;
1484 eind->func_pointer_refcount = 0;
1487 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1492 elf64_x86_64_elf_object_p (bfd *abfd)
1494 /* Set the right machine number for an x86-64 elf64 file. */
1495 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
1500 elf32_x86_64_elf_object_p (bfd *abfd)
1502 /* Set the right machine number for an x86-64 elf32 file. */
1503 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1507 /* Return TRUE if the TLS access code sequence support transition
1511 elf_x86_64_check_tls_transition (bfd *abfd,
1512 struct bfd_link_info *info,
1515 Elf_Internal_Shdr *symtab_hdr,
1516 struct elf_link_hash_entry **sym_hashes,
1517 unsigned int r_type,
1518 const Elf_Internal_Rela *rel,
1519 const Elf_Internal_Rela *relend)
1522 unsigned long r_symndx;
1523 bfd_boolean largepic = FALSE;
1524 struct elf_link_hash_entry *h;
1526 struct elf_x86_64_link_hash_table *htab;
1528 bfd_boolean indirect_call, tls_get_addr;
1530 htab = elf_x86_64_hash_table (info);
1531 offset = rel->r_offset;
1534 case R_X86_64_TLSGD:
1535 case R_X86_64_TLSLD:
1536 if ((rel + 1) >= relend)
1539 if (r_type == R_X86_64_TLSGD)
1541 /* Check transition from GD access model. For 64bit, only
1542 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1543 .word 0x6666; rex64; call __tls_get_addr@PLT
1545 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1547 call *__tls_get_addr@GOTPCREL(%rip)
1548 which may be converted to
1549 addr32 call __tls_get_addr
1550 can transit to different access model. For 32bit, only
1551 leaq foo@tlsgd(%rip), %rdi
1552 .word 0x6666; rex64; call __tls_get_addr@PLT
1554 leaq foo@tlsgd(%rip), %rdi
1556 call *__tls_get_addr@GOTPCREL(%rip)
1557 which may be converted to
1558 addr32 call __tls_get_addr
1559 can transit to different access model. For largepic,
1561 leaq foo@tlsgd(%rip), %rdi
1562 movabsq $__tls_get_addr@pltoff, %rax
1566 leaq foo@tlsgd(%rip), %rdi
1567 movabsq $__tls_get_addr@pltoff, %rax
1571 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1573 if ((offset + 12) > sec->size)
1576 call = contents + offset + 4;
1578 || !((call[1] == 0x48
1586 && call[3] == 0xe8)))
1588 if (!ABI_64_P (abfd)
1589 || (offset + 19) > sec->size
1591 || memcmp (call - 7, leaq + 1, 3) != 0
1592 || memcmp (call, "\x48\xb8", 2) != 0
1596 || !((call[10] == 0x48 && call[12] == 0xd8)
1597 || (call[10] == 0x4c && call[12] == 0xf8)))
1601 else if (ABI_64_P (abfd))
1604 || memcmp (contents + offset - 4, leaq, 4) != 0)
1610 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
1613 indirect_call = call[2] == 0xff;
1617 /* Check transition from LD access model. Only
1618 leaq foo@tlsld(%rip), %rdi;
1619 call __tls_get_addr@PLT
1621 leaq foo@tlsld(%rip), %rdi;
1622 call *__tls_get_addr@GOTPCREL(%rip)
1623 which may be converted to
1624 addr32 call __tls_get_addr
1625 can transit to different access model. For largepic
1627 leaq foo@tlsld(%rip), %rdi
1628 movabsq $__tls_get_addr@pltoff, %rax
1632 leaq foo@tlsld(%rip), %rdi
1633 movabsq $__tls_get_addr@pltoff, %rax
1637 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
1639 if (offset < 3 || (offset + 9) > sec->size)
1642 if (memcmp (contents + offset - 3, lea, 3) != 0)
1645 call = contents + offset + 4;
1646 if (!(call[0] == 0xe8
1647 || (call[0] == 0xff && call[1] == 0x15)
1648 || (call[0] == 0x67 && call[1] == 0xe8)))
1650 if (!ABI_64_P (abfd)
1651 || (offset + 19) > sec->size
1652 || memcmp (call, "\x48\xb8", 2) != 0
1656 || !((call[10] == 0x48 && call[12] == 0xd8)
1657 || (call[10] == 0x4c && call[12] == 0xf8)))
1661 indirect_call = call[0] == 0xff;
1664 r_symndx = htab->r_sym (rel[1].r_info);
1665 if (r_symndx < symtab_hdr->sh_info)
1668 tls_get_addr = FALSE;
1669 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1670 if (h != NULL && h->root.root.string != NULL)
1672 struct elf_x86_64_link_hash_entry *eh
1673 = (struct elf_x86_64_link_hash_entry *) h;
1674 tls_get_addr = eh->tls_get_addr == 1;
1675 if (eh->tls_get_addr > 1)
1677 /* Use strncmp to check __tls_get_addr since
1678 __tls_get_addr may be versioned. */
1679 if (strncmp (h->root.root.string, "__tls_get_addr", 14)
1682 eh->tls_get_addr = 1;
1683 tls_get_addr = TRUE;
1686 eh->tls_get_addr = 0;
1693 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64;
1694 else if (indirect_call)
1695 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX;
1697 return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1698 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
1700 case R_X86_64_GOTTPOFF:
1701 /* Check transition from IE access model:
1702 mov foo@gottpoff(%rip), %reg
1703 add foo@gottpoff(%rip), %reg
1706 /* Check REX prefix first. */
1707 if (offset >= 3 && (offset + 4) <= sec->size)
1709 val = bfd_get_8 (abfd, contents + offset - 3);
1710 if (val != 0x48 && val != 0x4c)
1712 /* X32 may have 0x44 REX prefix or no REX prefix. */
1713 if (ABI_64_P (abfd))
1719 /* X32 may not have any REX prefix. */
1720 if (ABI_64_P (abfd))
1722 if (offset < 2 || (offset + 3) > sec->size)
1726 val = bfd_get_8 (abfd, contents + offset - 2);
1727 if (val != 0x8b && val != 0x03)
1730 val = bfd_get_8 (abfd, contents + offset - 1);
1731 return (val & 0xc7) == 5;
1733 case R_X86_64_GOTPC32_TLSDESC:
1734 /* Check transition from GDesc access model:
1735 leaq x@tlsdesc(%rip), %rax
1737 Make sure it's a leaq adding rip to a 32-bit offset
1738 into any register, although it's probably almost always
1741 if (offset < 3 || (offset + 4) > sec->size)
1744 val = bfd_get_8 (abfd, contents + offset - 3);
1745 if ((val & 0xfb) != 0x48)
1748 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1751 val = bfd_get_8 (abfd, contents + offset - 1);
1752 return (val & 0xc7) == 0x05;
1754 case R_X86_64_TLSDESC_CALL:
1755 /* Check transition from GDesc access model:
1756 call *x@tlsdesc(%rax)
1758 if (offset + 2 <= sec->size)
1760 /* Make sure that it's a call *x@tlsdesc(%rax). */
1761 call = contents + offset;
1762 return call[0] == 0xff && call[1] == 0x10;
1772 /* Return TRUE if the TLS access transition is OK or no transition
1773 will be performed. Update R_TYPE if there is a transition. */
1776 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1777 asection *sec, bfd_byte *contents,
1778 Elf_Internal_Shdr *symtab_hdr,
1779 struct elf_link_hash_entry **sym_hashes,
1780 unsigned int *r_type, int tls_type,
1781 const Elf_Internal_Rela *rel,
1782 const Elf_Internal_Rela *relend,
1783 struct elf_link_hash_entry *h,
1784 unsigned long r_symndx,
1785 bfd_boolean from_relocate_section)
1787 unsigned int from_type = *r_type;
1788 unsigned int to_type = from_type;
1789 bfd_boolean check = TRUE;
1791 /* Skip TLS transition for functions. */
1793 && (h->type == STT_FUNC
1794 || h->type == STT_GNU_IFUNC))
1799 case R_X86_64_TLSGD:
1800 case R_X86_64_GOTPC32_TLSDESC:
1801 case R_X86_64_TLSDESC_CALL:
1802 case R_X86_64_GOTTPOFF:
1803 if (bfd_link_executable (info))
1806 to_type = R_X86_64_TPOFF32;
1808 to_type = R_X86_64_GOTTPOFF;
1811 /* When we are called from elf_x86_64_relocate_section, there may
1812 be additional transitions based on TLS_TYPE. */
1813 if (from_relocate_section)
1815 unsigned int new_to_type = to_type;
1817 if (bfd_link_executable (info)
1820 && tls_type == GOT_TLS_IE)
1821 new_to_type = R_X86_64_TPOFF32;
1823 if (to_type == R_X86_64_TLSGD
1824 || to_type == R_X86_64_GOTPC32_TLSDESC
1825 || to_type == R_X86_64_TLSDESC_CALL)
1827 if (tls_type == GOT_TLS_IE)
1828 new_to_type = R_X86_64_GOTTPOFF;
1831 /* We checked the transition before when we were called from
1832 elf_x86_64_check_relocs. We only want to check the new
1833 transition which hasn't been checked before. */
1834 check = new_to_type != to_type && from_type == to_type;
1835 to_type = new_to_type;
1840 case R_X86_64_TLSLD:
1841 if (bfd_link_executable (info))
1842 to_type = R_X86_64_TPOFF32;
1849 /* Return TRUE if there is no transition. */
1850 if (from_type == to_type)
1853 /* Check if the transition can be performed. */
1855 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1856 symtab_hdr, sym_hashes,
1857 from_type, rel, relend))
1859 reloc_howto_type *from, *to;
1862 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1863 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1866 name = h->root.root.string;
1869 struct elf_x86_64_link_hash_table *htab;
1871 htab = elf_x86_64_hash_table (info);
1876 Elf_Internal_Sym *isym;
1878 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1880 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1885 /* xgettext:c-format */
1886 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1887 "in section `%A' failed"),
1888 abfd, from->name, to->name, name,
1889 (unsigned long) rel->r_offset, sec);
1890 bfd_set_error (bfd_error_bad_value);
1898 /* Rename some of the generic section flags to better document how they
1900 #define need_convert_load sec_flg0
1901 #define check_relocs_failed sec_flg1
1904 elf_x86_64_need_pic (bfd *input_bfd, asection *sec,
1905 struct elf_link_hash_entry *h,
1906 Elf_Internal_Shdr *symtab_hdr,
1907 Elf_Internal_Sym *isym,
1908 reloc_howto_type *howto)
1911 const char *und = "";
1912 const char *pic = "";
1917 name = h->root.root.string;
1918 switch (ELF_ST_VISIBILITY (h->other))
1921 v = _("hidden symbol ");
1924 v = _("internal symbol ");
1927 v = _("protected symbol ");
1931 pic = _("; recompile with -fPIC");
1935 if (!h->def_regular && !h->def_dynamic)
1936 und = _("undefined ");
1940 name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL);
1941 pic = _("; recompile with -fPIC");
1944 /* xgettext:c-format */
1945 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1946 "not be used when making a shared object%s"),
1947 input_bfd, howto->name, und, v, name, pic);
1948 bfd_set_error (bfd_error_bad_value);
1949 sec->check_relocs_failed = 1;
1953 /* With the local symbol, foo, we convert
1954 mov foo@GOTPCREL(%rip), %reg
1958 call/jmp *foo@GOTPCREL(%rip)
1960 nop call foo/jmp foo nop
1961 When PIC is false, convert
1962 test %reg, foo@GOTPCREL(%rip)
1966 binop foo@GOTPCREL(%rip), %reg
1969 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1973 elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec,
1975 Elf_Internal_Rela *irel,
1976 struct elf_link_hash_entry *h,
1977 bfd_boolean *converted,
1978 struct bfd_link_info *link_info)
1980 struct elf_x86_64_link_hash_table *htab;
1982 bfd_boolean require_reloc_pc32;
1984 bfd_boolean to_reloc_pc32;
1987 bfd_signed_vma raddend;
1988 unsigned int opcode;
1990 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
1991 unsigned int r_symndx;
1993 bfd_vma roff = irel->r_offset;
1995 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
1998 raddend = irel->r_addend;
1999 /* Addend for 32-bit PC-relative relocation must be -4. */
2003 htab = elf_x86_64_hash_table (link_info);
2004 is_pic = bfd_link_pic (link_info);
2006 relocx = (r_type == R_X86_64_GOTPCRELX
2007 || r_type == R_X86_64_REX_GOTPCRELX);
2009 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
2012 = link_info->disable_target_specific_optimizations > 1;
2014 r_symndx = htab->r_sym (irel->r_info);
2016 opcode = bfd_get_8 (abfd, contents + roff - 2);
2018 /* Convert mov to lea since it has been done for a while. */
2021 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
2022 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
2023 test, xor instructions. */
2028 /* We convert only to R_X86_64_PC32:
2030 2. R_X86_64_GOTPCREL since we can't modify REX byte.
2031 3. require_reloc_pc32 is true.
2034 to_reloc_pc32 = (opcode == 0xff
2036 || require_reloc_pc32
2039 /* Get the symbol referred to by the reloc. */
2042 Elf_Internal_Sym *isym
2043 = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx);
2045 /* Skip relocation against undefined symbols. */
2046 if (isym->st_shndx == SHN_UNDEF)
2049 symtype = ELF_ST_TYPE (isym->st_info);
2051 if (isym->st_shndx == SHN_ABS)
2052 tsec = bfd_abs_section_ptr;
2053 else if (isym->st_shndx == SHN_COMMON)
2054 tsec = bfd_com_section_ptr;
2055 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
2056 tsec = &_bfd_elf_large_com_section;
2058 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2060 toff = isym->st_value;
2064 /* Undefined weak symbol is only bound locally in executable
2065 and its reference is resolved as 0 without relocation
2066 overflow. We can only perform this optimization for
2067 GOTPCRELX relocations since we need to modify REX byte.
2068 It is OK convert mov with R_X86_64_GOTPCREL to
2070 if ((relocx || opcode == 0x8b)
2071 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
2073 elf_x86_64_hash_entry (h)))
2077 /* Skip for branch instructions since R_X86_64_PC32
2079 if (require_reloc_pc32)
2084 /* For non-branch instructions, we can convert to
2085 R_X86_64_32/R_X86_64_32S since we know if there
2087 to_reloc_pc32 = FALSE;
2090 /* Since we don't know the current PC when PIC is true,
2091 we can't convert to R_X86_64_PC32. */
2092 if (to_reloc_pc32 && is_pic)
2097 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
2098 ld.so may use its link-time address. */
2099 else if (h->start_stop
2101 || h->root.type == bfd_link_hash_defined
2102 || h->root.type == bfd_link_hash_defweak)
2103 && h != htab->elf.hdynamic
2104 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
2106 /* bfd_link_hash_new or bfd_link_hash_undefined is
2107 set by an assignment in a linker script in
2108 bfd_elf_record_link_assignment. start_stop is set
2109 on __start_SECNAME/__stop_SECNAME which mark section
2113 && (h->root.type == bfd_link_hash_new
2114 || h->root.type == bfd_link_hash_undefined
2115 || ((h->root.type == bfd_link_hash_defined
2116 || h->root.type == bfd_link_hash_defweak)
2117 && h->root.u.def.section == bfd_und_section_ptr))))
2119 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
2120 if (require_reloc_pc32)
2124 tsec = h->root.u.def.section;
2125 toff = h->root.u.def.value;
2132 /* Don't convert GOTPCREL relocation against large section. */
2133 if (elf_section_data (tsec) != NULL
2134 && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0)
2137 /* We can only estimate relocation overflow for R_X86_64_PC32. */
2141 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
2143 /* At this stage in linking, no SEC_MERGE symbol has been
2144 adjusted, so all references to such symbols need to be
2145 passed through _bfd_merged_section_offset. (Later, in
2146 relocate_section, all SEC_MERGE symbols *except* for
2147 section symbols have been adjusted.)
2149 gas may reduce relocations against symbols in SEC_MERGE
2150 sections to a relocation against the section symbol when
2151 the original addend was zero. When the reloc is against
2152 a section symbol we should include the addend in the
2153 offset passed to _bfd_merged_section_offset, since the
2154 location of interest is the original symbol. On the
2155 other hand, an access to "sym+addend" where "sym" is not
2156 a section symbol should not include the addend; Such an
2157 access is presumed to be an offset from "sym"; The
2158 location of interest is just "sym". */
2159 if (symtype == STT_SECTION)
2162 toff = _bfd_merged_section_offset (abfd, &tsec,
2163 elf_section_data (tsec)->sec_info,
2166 if (symtype != STT_SECTION)
2172 /* Don't convert if R_X86_64_PC32 relocation overflows. */
2173 if (tsec->output_section == sec->output_section)
2175 if ((toff - roff + 0x80000000) > 0xffffffff)
2180 bfd_signed_vma distance;
2182 /* At this point, we don't know the load addresses of TSEC
2183 section nor SEC section. We estimate the distrance between
2184 SEC and TSEC. We store the estimated distances in the
2185 compressed_size field of the output section, which is only
2186 used to decompress the compressed input section. */
2187 if (sec->output_section->compressed_size == 0)
2190 bfd_size_type size = 0;
2191 for (asect = link_info->output_bfd->sections;
2193 asect = asect->next)
2194 /* Skip debug sections since compressed_size is used to
2195 compress debug sections. */
2196 if ((asect->flags & SEC_DEBUGGING) == 0)
2199 for (i = asect->map_head.s;
2203 size = align_power (size, i->alignment_power);
2206 asect->compressed_size = size;
2210 /* Don't convert GOTPCREL relocations if TSEC isn't placed
2212 distance = (tsec->output_section->compressed_size
2213 - sec->output_section->compressed_size);
2217 /* Take PT_GNU_RELRO segment into account by adding
2219 if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize
2220 - roff + 0x80000000) > 0xffffffff)
2227 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
2232 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
2234 modrm = bfd_get_8 (abfd, contents + roff - 1);
2237 /* Convert to "jmp foo nop". */
2240 nop_offset = irel->r_offset + 3;
2241 disp = bfd_get_32 (abfd, contents + irel->r_offset);
2242 irel->r_offset -= 1;
2243 bfd_put_32 (abfd, disp, contents + irel->r_offset);
2247 struct elf_x86_64_link_hash_entry *eh
2248 = (struct elf_x86_64_link_hash_entry *) h;
2250 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
2253 /* To support TLS optimization, always use addr32 prefix for
2254 "call *__tls_get_addr@GOTPCREL(%rip)". */
2255 if (eh && eh->tls_get_addr == 1)
2258 nop_offset = irel->r_offset - 2;
2262 nop = link_info->call_nop_byte;
2263 if (link_info->call_nop_as_suffix)
2265 nop_offset = irel->r_offset + 3;
2266 disp = bfd_get_32 (abfd, contents + irel->r_offset);
2267 irel->r_offset -= 1;
2268 bfd_put_32 (abfd, disp, contents + irel->r_offset);
2271 nop_offset = irel->r_offset - 2;
2274 bfd_put_8 (abfd, nop, contents + nop_offset);
2275 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
2276 r_type = R_X86_64_PC32;
2281 unsigned int rex_mask = REX_R;
2283 if (r_type == R_X86_64_REX_GOTPCRELX)
2284 rex = bfd_get_8 (abfd, contents + roff - 3);
2292 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2293 "lea foo(%rip), %reg". */
2295 r_type = R_X86_64_PC32;
2299 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2300 "mov $foo, %reg". */
2302 modrm = bfd_get_8 (abfd, contents + roff - 1);
2303 modrm = 0xc0 | (modrm & 0x38) >> 3;
2304 if ((rex & REX_W) != 0
2305 && ABI_64_P (link_info->output_bfd))
2307 /* Keep the REX_W bit in REX byte for LP64. */
2308 r_type = R_X86_64_32S;
2309 goto rewrite_modrm_rex;
2313 /* If the REX_W bit in REX byte isn't needed,
2314 use R_X86_64_32 and clear the W bit to avoid
2315 sign-extend imm32 to imm64. */
2316 r_type = R_X86_64_32;
2317 /* Clear the W bit in REX byte. */
2319 goto rewrite_modrm_rex;
2325 /* R_X86_64_PC32 isn't supported. */
2329 modrm = bfd_get_8 (abfd, contents + roff - 1);
2332 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
2333 "test $foo, %reg". */
2334 modrm = 0xc0 | (modrm & 0x38) >> 3;
2339 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
2340 "binop $foo, %reg". */
2341 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
2345 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
2346 overflow when sign-extending imm32 to imm64. */
2347 r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32;
2350 bfd_put_8 (abfd, modrm, contents + roff - 1);
2354 /* Move the R bit to the B bit in REX byte. */
2355 rex = (rex & ~rex_mask) | (rex & REX_R) >> 2;
2356 bfd_put_8 (abfd, rex, contents + roff - 3);
2359 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
2363 bfd_put_8 (abfd, opcode, contents + roff - 2);
2366 irel->r_info = htab->r_info (r_symndx, r_type);
2373 /* Look through the relocs for a section during the first phase, and
2374 calculate needed space in the global offset table, procedure
2375 linkage table, and dynamic reloc sections. */
2378 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
2380 const Elf_Internal_Rela *relocs)
2382 struct elf_x86_64_link_hash_table *htab;
2383 Elf_Internal_Shdr *symtab_hdr;
2384 struct elf_link_hash_entry **sym_hashes;
2385 const Elf_Internal_Rela *rel;
2386 const Elf_Internal_Rela *rel_end;
2390 if (bfd_link_relocatable (info))
2393 /* Don't do anything special with non-loaded, non-alloced sections.
2394 In particular, any relocs in such sections should not affect GOT
2395 and PLT reference counting (ie. we don't allow them to create GOT
2396 or PLT entries), there's no possibility or desire to optimize TLS
2397 relocs, and there's not much point in propagating relocs to shared
2398 libs that the dynamic linker won't relocate. */
2399 if ((sec->flags & SEC_ALLOC) == 0)
2402 BFD_ASSERT (is_x86_64_elf (abfd));
2404 htab = elf_x86_64_hash_table (info);
2407 sec->check_relocs_failed = 1;
2411 /* Get the section contents. */
2412 if (elf_section_data (sec)->this_hdr.contents != NULL)
2413 contents = elf_section_data (sec)->this_hdr.contents;
2414 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2416 sec->check_relocs_failed = 1;
2420 symtab_hdr = &elf_symtab_hdr (abfd);
2421 sym_hashes = elf_sym_hashes (abfd);
2425 rel_end = relocs + sec->reloc_count;
2426 for (rel = relocs; rel < rel_end; rel++)
2428 unsigned int r_type;
2429 unsigned long r_symndx;
2430 struct elf_link_hash_entry *h;
2431 struct elf_x86_64_link_hash_entry *eh;
2432 Elf_Internal_Sym *isym;
2434 bfd_boolean size_reloc;
2436 r_symndx = htab->r_sym (rel->r_info);
2437 r_type = ELF32_R_TYPE (rel->r_info);
2439 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
2441 /* xgettext:c-format */
2442 _bfd_error_handler (_("%B: bad symbol index: %d"),
2447 if (r_symndx < symtab_hdr->sh_info)
2449 /* A local symbol. */
2450 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2455 /* Check relocation against local STT_GNU_IFUNC symbol. */
2456 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2458 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
2463 /* Fake a STT_GNU_IFUNC symbol. */
2464 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
2466 h->type = STT_GNU_IFUNC;
2469 h->forced_local = 1;
2470 h->root.type = bfd_link_hash_defined;
2478 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2479 while (h->root.type == bfd_link_hash_indirect
2480 || h->root.type == bfd_link_hash_warning)
2481 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2484 /* Check invalid x32 relocations. */
2485 if (!ABI_64_P (abfd))
2491 case R_X86_64_DTPOFF64:
2492 case R_X86_64_TPOFF64:
2494 case R_X86_64_GOTOFF64:
2495 case R_X86_64_GOT64:
2496 case R_X86_64_GOTPCREL64:
2497 case R_X86_64_GOTPC64:
2498 case R_X86_64_GOTPLT64:
2499 case R_X86_64_PLTOFF64:
2502 name = h->root.root.string;
2504 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2507 /* xgettext:c-format */
2508 (_("%B: relocation %s against symbol `%s' isn't "
2509 "supported in x32 mode"), abfd,
2510 x86_64_elf_howto_table[r_type].name, name);
2511 bfd_set_error (bfd_error_bad_value);
2519 /* It is referenced by a non-shared object. */
2521 h->root.non_ir_ref_regular = 1;
2523 if (h->type == STT_GNU_IFUNC)
2524 elf_tdata (info->output_bfd)->has_gnu_symbols
2525 |= elf_gnu_symbol_ifunc;
2528 if (! elf_x86_64_tls_transition (info, abfd, sec, contents,
2529 symtab_hdr, sym_hashes,
2530 &r_type, GOT_UNKNOWN,
2531 rel, rel_end, h, r_symndx, FALSE))
2534 eh = (struct elf_x86_64_link_hash_entry *) h;
2537 case R_X86_64_TLSLD:
2538 htab->tls_ld_got.refcount += 1;
2541 case R_X86_64_TPOFF32:
2542 if (!bfd_link_executable (info) && ABI_64_P (abfd))
2543 return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym,
2544 &x86_64_elf_howto_table[r_type]);
2546 eh->has_got_reloc = 1;
2549 case R_X86_64_GOTTPOFF:
2550 if (!bfd_link_executable (info))
2551 info->flags |= DF_STATIC_TLS;
2554 case R_X86_64_GOT32:
2555 case R_X86_64_GOTPCREL:
2556 case R_X86_64_GOTPCRELX:
2557 case R_X86_64_REX_GOTPCRELX:
2558 case R_X86_64_TLSGD:
2559 case R_X86_64_GOT64:
2560 case R_X86_64_GOTPCREL64:
2561 case R_X86_64_GOTPLT64:
2562 case R_X86_64_GOTPC32_TLSDESC:
2563 case R_X86_64_TLSDESC_CALL:
2564 /* This symbol requires a global offset table entry. */
2566 int tls_type, old_tls_type;
2570 default: tls_type = GOT_NORMAL; break;
2571 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
2572 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
2573 case R_X86_64_GOTPC32_TLSDESC:
2574 case R_X86_64_TLSDESC_CALL:
2575 tls_type = GOT_TLS_GDESC; break;
2580 h->got.refcount += 1;
2581 old_tls_type = eh->tls_type;
2585 bfd_signed_vma *local_got_refcounts;
2587 /* This is a global offset table entry for a local symbol. */
2588 local_got_refcounts = elf_local_got_refcounts (abfd);
2589 if (local_got_refcounts == NULL)
2593 size = symtab_hdr->sh_info;
2594 size *= sizeof (bfd_signed_vma)
2595 + sizeof (bfd_vma) + sizeof (char);
2596 local_got_refcounts = ((bfd_signed_vma *)
2597 bfd_zalloc (abfd, size));
2598 if (local_got_refcounts == NULL)
2600 elf_local_got_refcounts (abfd) = local_got_refcounts;
2601 elf_x86_64_local_tlsdesc_gotent (abfd)
2602 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2603 elf_x86_64_local_got_tls_type (abfd)
2604 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2606 local_got_refcounts[r_symndx] += 1;
2608 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
2611 /* If a TLS symbol is accessed using IE at least once,
2612 there is no point to use dynamic model for it. */
2613 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2614 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2615 || tls_type != GOT_TLS_IE))
2617 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
2618 tls_type = old_tls_type;
2619 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2620 && GOT_TLS_GD_ANY_P (tls_type))
2621 tls_type |= old_tls_type;
2625 name = h->root.root.string;
2627 name = bfd_elf_sym_name (abfd, symtab_hdr,
2630 /* xgettext:c-format */
2631 (_("%B: '%s' accessed both as normal and"
2632 " thread local symbol"),
2634 bfd_set_error (bfd_error_bad_value);
2639 if (old_tls_type != tls_type)
2642 eh->tls_type = tls_type;
2644 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
2649 case R_X86_64_GOTOFF64:
2650 case R_X86_64_GOTPC32:
2651 case R_X86_64_GOTPC64:
2654 eh->has_got_reloc = 1;
2657 case R_X86_64_PLT32:
2658 case R_X86_64_PLT32_BND:
2659 /* This symbol requires a procedure linkage table entry. We
2660 actually build the entry in adjust_dynamic_symbol,
2661 because this might be a case of linking PIC code which is
2662 never referenced by a dynamic object, in which case we
2663 don't need to generate a procedure linkage table entry
2666 /* If this is a local symbol, we resolve it directly without
2667 creating a procedure linkage table entry. */
2671 eh->has_got_reloc = 1;
2673 h->plt.refcount += 1;
2676 case R_X86_64_PLTOFF64:
2677 /* This tries to form the 'address' of a function relative
2678 to GOT. For global symbols we need a PLT entry. */
2682 h->plt.refcount += 1;
2686 case R_X86_64_SIZE32:
2687 case R_X86_64_SIZE64:
2692 if (!ABI_64_P (abfd))
2698 /* Check relocation overflow as these relocs may lead to
2699 run-time relocation overflow. Don't error out for
2700 sections we don't care about, such as debug sections or
2701 when relocation overflow check is disabled. */
2702 if (!info->no_reloc_overflow_check
2703 && (bfd_link_pic (info)
2704 || (bfd_link_executable (info)
2708 && (sec->flags & SEC_READONLY) == 0)))
2709 return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym,
2710 &x86_64_elf_howto_table[r_type]);
2716 case R_X86_64_PC32_BND:
2720 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2721 eh->has_non_got_reloc = 1;
2722 /* We are called after all symbols have been resolved. Only
2723 relocation against STT_GNU_IFUNC symbol must go through
2726 && (bfd_link_executable (info)
2727 || h->type == STT_GNU_IFUNC))
2729 /* If this reloc is in a read-only section, we might
2730 need a copy reloc. We can't check reliably at this
2731 stage whether the section is read-only, as input
2732 sections have not yet been mapped to output sections.
2733 Tentatively set the flag for now, and correct in
2734 adjust_dynamic_symbol. */
2737 /* We may need a .plt entry if the symbol is a function
2738 defined in a shared lib or is a STT_GNU_IFUNC function
2739 referenced from the code or read-only section. */
2741 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2742 h->plt.refcount += 1;
2744 if (r_type == R_X86_64_PC32)
2746 /* Since something like ".long foo - ." may be used
2747 as pointer, make sure that PLT is used if foo is
2748 a function defined in a shared library. */
2749 if ((sec->flags & SEC_CODE) == 0)
2750 h->pointer_equality_needed = 1;
2752 else if (r_type != R_X86_64_PC32_BND
2753 && r_type != R_X86_64_PC64)
2755 h->pointer_equality_needed = 1;
2756 /* At run-time, R_X86_64_64 can be resolved for both
2757 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2758 can only be resolved for x32. */
2759 if ((sec->flags & SEC_READONLY) == 0
2760 && (r_type == R_X86_64_64
2761 || (!ABI_64_P (abfd)
2762 && (r_type == R_X86_64_32
2763 || r_type == R_X86_64_32S))))
2764 eh->func_pointer_refcount += 1;
2770 /* If we are creating a shared library, and this is a reloc
2771 against a global symbol, or a non PC relative reloc
2772 against a local symbol, then we need to copy the reloc
2773 into the shared library. However, if we are linking with
2774 -Bsymbolic, we do not need to copy a reloc against a
2775 global symbol which is defined in an object we are
2776 including in the link (i.e., DEF_REGULAR is set). At
2777 this point we have not seen all the input files, so it is
2778 possible that DEF_REGULAR is not set now but will be set
2779 later (it is never cleared). In case of a weak definition,
2780 DEF_REGULAR may be cleared later by a strong definition in
2781 a shared library. We account for that possibility below by
2782 storing information in the relocs_copied field of the hash
2783 table entry. A similar situation occurs when creating
2784 shared libraries and symbol visibility changes render the
2787 If on the other hand, we are creating an executable, we
2788 may need to keep relocations for symbols satisfied by a
2789 dynamic library if we manage to avoid copy relocs for the
2792 Generate dynamic pointer relocation against STT_GNU_IFUNC
2793 symbol in the non-code section. */
2794 if ((bfd_link_pic (info)
2795 && (! IS_X86_64_PCREL_TYPE (r_type)
2797 && (! (bfd_link_pie (info)
2798 || SYMBOLIC_BIND (info, h))
2799 || h->root.type == bfd_link_hash_defweak
2800 || !h->def_regular))))
2802 && h->type == STT_GNU_IFUNC
2803 && r_type == htab->pointer_r_type
2804 && (sec->flags & SEC_CODE) == 0)
2805 || (ELIMINATE_COPY_RELOCS
2806 && !bfd_link_pic (info)
2808 && (h->root.type == bfd_link_hash_defweak
2809 || !h->def_regular)))
2811 struct elf_dyn_relocs *p;
2812 struct elf_dyn_relocs **head;
2814 /* We must copy these reloc types into the output file.
2815 Create a reloc section in dynobj and make room for
2819 sreloc = _bfd_elf_make_dynamic_reloc_section
2820 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2821 abfd, /*rela?*/ TRUE);
2827 /* If this is a global symbol, we count the number of
2828 relocations we need for this symbol. */
2830 head = &eh->dyn_relocs;
2833 /* Track dynamic relocs needed for local syms too.
2834 We really need local syms available to do this
2839 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2844 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2848 /* Beware of type punned pointers vs strict aliasing
2850 vpp = &(elf_section_data (s)->local_dynrel);
2851 head = (struct elf_dyn_relocs **)vpp;
2855 if (p == NULL || p->sec != sec)
2857 bfd_size_type amt = sizeof *p;
2859 p = ((struct elf_dyn_relocs *)
2860 bfd_alloc (htab->elf.dynobj, amt));
2871 /* Count size relocation as PC-relative relocation. */
2872 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
2877 /* This relocation describes the C++ object vtable hierarchy.
2878 Reconstruct it for later use during GC. */
2879 case R_X86_64_GNU_VTINHERIT:
2880 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2884 /* This relocation describes which C++ vtable entries are actually
2885 used. Record for later use during GC. */
2886 case R_X86_64_GNU_VTENTRY:
2887 BFD_ASSERT (h != NULL);
2889 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2897 if ((r_type == R_X86_64_GOTPCREL
2898 || r_type == R_X86_64_GOTPCRELX
2899 || r_type == R_X86_64_REX_GOTPCRELX)
2900 && (h == NULL || h->type != STT_GNU_IFUNC))
2901 sec->need_convert_load = 1;
2904 if (elf_section_data (sec)->this_hdr.contents != contents)
2906 if (!info->keep_memory)
2910 /* Cache the section contents for elf_link_input_bfd. */
2911 elf_section_data (sec)->this_hdr.contents = contents;
2918 if (elf_section_data (sec)->this_hdr.contents != contents)
2920 sec->check_relocs_failed = 1;
2924 /* Return the section that should be marked against GC for a given
2928 elf_x86_64_gc_mark_hook (asection *sec,
2929 struct bfd_link_info *info,
2930 Elf_Internal_Rela *rel,
2931 struct elf_link_hash_entry *h,
2932 Elf_Internal_Sym *sym)
2935 switch (ELF32_R_TYPE (rel->r_info))
2937 case R_X86_64_GNU_VTINHERIT:
2938 case R_X86_64_GNU_VTENTRY:
2942 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2945 /* Remove undefined weak symbol from the dynamic symbol table if it
2946 is resolved to 0. */
2949 elf_x86_64_fixup_symbol (struct bfd_link_info *info,
2950 struct elf_link_hash_entry *h)
2952 if (h->dynindx != -1
2953 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2954 elf_x86_64_hash_entry (h)->has_got_reloc,
2955 elf_x86_64_hash_entry (h)))
2958 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2964 /* Adjust a symbol defined by a dynamic object and referenced by a
2965 regular object. The current definition is in some section of the
2966 dynamic object, but we're not including those sections. We have to
2967 change the definition to something the rest of the link can
2971 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2972 struct elf_link_hash_entry *h)
2974 struct elf_x86_64_link_hash_table *htab;
2976 struct elf_x86_64_link_hash_entry *eh;
2977 struct elf_dyn_relocs *p;
2979 /* STT_GNU_IFUNC symbol must go through PLT. */
2980 if (h->type == STT_GNU_IFUNC)
2982 /* All local STT_GNU_IFUNC references must be treate as local
2983 calls via local PLT. */
2985 && SYMBOL_CALLS_LOCAL (info, h))
2987 bfd_size_type pc_count = 0, count = 0;
2988 struct elf_dyn_relocs **pp;
2990 eh = (struct elf_x86_64_link_hash_entry *) h;
2991 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2993 pc_count += p->pc_count;
2994 p->count -= p->pc_count;
3003 if (pc_count || count)
3008 /* Increment PLT reference count only for PC-relative
3011 if (h->plt.refcount <= 0)
3012 h->plt.refcount = 1;
3014 h->plt.refcount += 1;
3019 if (h->plt.refcount <= 0)
3021 h->plt.offset = (bfd_vma) -1;
3027 /* If this is a function, put it in the procedure linkage table. We
3028 will fill in the contents of the procedure linkage table later,
3029 when we know the address of the .got section. */
3030 if (h->type == STT_FUNC
3033 if (h->plt.refcount <= 0
3034 || SYMBOL_CALLS_LOCAL (info, h)
3035 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3036 && h->root.type == bfd_link_hash_undefweak))
3038 /* This case can occur if we saw a PLT32 reloc in an input
3039 file, but the symbol was never referred to by a dynamic
3040 object, or if all references were garbage collected. In
3041 such a case, we don't actually need to build a procedure
3042 linkage table, and we can just do a PC32 reloc instead. */
3043 h->plt.offset = (bfd_vma) -1;
3050 /* It's possible that we incorrectly decided a .plt reloc was
3051 needed for an R_X86_64_PC32 reloc to a non-function sym in
3052 check_relocs. We can't decide accurately between function and
3053 non-function syms in check-relocs; Objects loaded later in
3054 the link may change h->type. So fix it now. */
3055 h->plt.offset = (bfd_vma) -1;
3057 /* If this is a weak symbol, and there is a real definition, the
3058 processor independent code will have arranged for us to see the
3059 real definition first, and we can just use the same value. */
3060 if (h->u.weakdef != NULL)
3062 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3063 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3064 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3065 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3066 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
3068 eh = (struct elf_x86_64_link_hash_entry *) h;
3069 h->non_got_ref = h->u.weakdef->non_got_ref;
3070 eh->needs_copy = h->u.weakdef->needs_copy;
3075 /* This is a reference to a symbol defined by a dynamic object which
3076 is not a function. */
3078 /* If we are creating a shared library, we must presume that the
3079 only references to the symbol are via the global offset table.
3080 For such cases we need not do anything here; the relocations will
3081 be handled correctly by relocate_section. */
3082 if (!bfd_link_executable (info))
3085 /* If there are no references to this symbol that do not use the
3086 GOT, we don't need to generate a copy reloc. */
3087 if (!h->non_got_ref)
3090 /* If -z nocopyreloc was given, we won't generate them either. */
3091 if (info->nocopyreloc)
3097 if (ELIMINATE_COPY_RELOCS)
3099 eh = (struct elf_x86_64_link_hash_entry *) h;
3100 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3102 s = p->sec->output_section;
3103 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3107 /* If we didn't find any dynamic relocs in read-only sections, then
3108 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3116 /* We must allocate the symbol in our .dynbss section, which will
3117 become part of the .bss section of the executable. There will be
3118 an entry for this symbol in the .dynsym section. The dynamic
3119 object will contain position independent code, so all references
3120 from the dynamic object to this symbol will go through the global
3121 offset table. The dynamic linker will use the .dynsym entry to
3122 determine the address it must put in the global offset table, so
3123 both the dynamic object and the regular object will refer to the
3124 same memory location for the variable. */
3126 htab = elf_x86_64_hash_table (info);
3130 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
3131 to copy the initial value out of the dynamic object and into the
3132 runtime process image. */
3133 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
3135 s = htab->elf.sdynrelro;
3136 srel = htab->elf.sreldynrelro;
3140 s = htab->elf.sdynbss;
3141 srel = htab->elf.srelbss;
3143 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3145 const struct elf_backend_data *bed;
3146 bed = get_elf_backend_data (info->output_bfd);
3147 srel->size += bed->s->sizeof_rela;
3151 return _bfd_elf_adjust_dynamic_copy (info, h, s);
3154 /* Allocate space in .plt, .got and associated reloc sections for
3158 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
3160 struct bfd_link_info *info;
3161 struct elf_x86_64_link_hash_table *htab;
3162 struct elf_x86_64_link_hash_entry *eh;
3163 struct elf_dyn_relocs *p;
3164 const struct elf_backend_data *bed;
3165 unsigned int plt_entry_size;
3166 bfd_boolean resolved_to_zero;
3168 if (h->root.type == bfd_link_hash_indirect)
3171 eh = (struct elf_x86_64_link_hash_entry *) h;
3173 info = (struct bfd_link_info *) inf;
3174 htab = elf_x86_64_hash_table (info);
3177 bed = get_elf_backend_data (info->output_bfd);
3178 plt_entry_size = htab->plt.plt_entry_size;
3180 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
3184 /* We can't use the GOT PLT if pointer equality is needed since
3185 finish_dynamic_symbol won't clear symbol value and the dynamic
3186 linker won't update the GOT slot. We will get into an infinite
3187 loop at run-time. */
3188 if (htab->plt_got != NULL
3189 && h->type != STT_GNU_IFUNC
3190 && !h->pointer_equality_needed
3191 && h->plt.refcount > 0
3192 && h->got.refcount > 0)
3194 /* Don't use the regular PLT if there are both GOT and GOTPLT
3196 h->plt.offset = (bfd_vma) -1;
3198 /* Use the GOT PLT. */
3199 eh->plt_got.refcount = 1;
3202 /* Clear the reference count of function pointer relocations if
3203 symbol isn't a normal function. */
3204 if (h->type != STT_FUNC)
3205 eh->func_pointer_refcount = 0;
3207 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
3208 here if it is defined and referenced in a non-shared object. */
3209 if (h->type == STT_GNU_IFUNC
3212 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
3214 &htab->readonly_dynrelocs_against_ifunc,
3218 GOT_ENTRY_SIZE, TRUE))
3220 asection *s = htab->plt_second;
3221 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
3223 /* Use the second PLT section if it is created. */
3224 eh->plt_second.offset = s->size;
3226 /* Make room for this entry in the second PLT section. */
3227 s->size += htab->non_lazy_plt->plt_entry_size;
3235 /* Don't create the PLT entry if there are only function pointer
3236 relocations which can be resolved at run-time. */
3237 else if (htab->elf.dynamic_sections_created
3238 && (h->plt.refcount > eh->func_pointer_refcount
3239 || eh->plt_got.refcount > 0))
3241 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
3243 /* Clear the reference count of function pointer relocations
3245 eh->func_pointer_refcount = 0;
3247 /* Make sure this symbol is output as a dynamic symbol.
3248 Undefined weak syms won't yet be marked as dynamic. */
3249 if (h->dynindx == -1
3251 && !resolved_to_zero
3252 && h->root.type == bfd_link_hash_undefweak)
3254 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3258 if (bfd_link_pic (info)
3259 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3261 asection *s = htab->elf.splt;
3262 asection *second_s = htab->plt_second;
3263 asection *got_s = htab->plt_got;
3265 /* If this is the first .plt entry, make room for the special
3266 first entry. The .plt section is used by prelink to undo
3267 prelinking for dynamic relocations. */
3269 s->size = htab->plt.has_plt0 * plt_entry_size;
3272 eh->plt_got.offset = got_s->size;
3275 h->plt.offset = s->size;
3277 eh->plt_second.offset = second_s->size;
3280 /* If this symbol is not defined in a regular file, and we are
3281 not generating a shared library, then set the symbol to this
3282 location in the .plt. This is required to make function
3283 pointers compare as equal between the normal executable and
3284 the shared library. */
3285 if (! bfd_link_pic (info)
3290 /* We need to make a call to the entry of the GOT PLT
3291 instead of regular PLT entry. */
3292 h->root.u.def.section = got_s;
3293 h->root.u.def.value = eh->plt_got.offset;
3299 /* We need to make a call to the entry of the
3300 second PLT instead of regular PLT entry. */
3301 h->root.u.def.section = second_s;
3302 h->root.u.def.value = eh->plt_second.offset;
3306 h->root.u.def.section = s;
3307 h->root.u.def.value = h->plt.offset;
3312 /* Make room for this entry. */
3314 got_s->size += htab->non_lazy_plt->plt_entry_size;
3317 s->size += plt_entry_size;
3319 second_s->size += htab->non_lazy_plt->plt_entry_size;
3321 /* We also need to make an entry in the .got.plt section,
3322 which will be placed in the .got section by the linker
3324 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
3326 /* There should be no PLT relocation against resolved
3327 undefined weak symbol in executable. */
3328 if (!resolved_to_zero)
3330 /* We also need to make an entry in the .rela.plt
3332 htab->elf.srelplt->size += bed->s->sizeof_rela;
3333 htab->elf.srelplt->reloc_count++;
3339 eh->plt_got.offset = (bfd_vma) -1;
3340 h->plt.offset = (bfd_vma) -1;
3346 eh->plt_got.offset = (bfd_vma) -1;
3347 h->plt.offset = (bfd_vma) -1;
3351 eh->tlsdesc_got = (bfd_vma) -1;
3353 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
3354 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
3355 if (h->got.refcount > 0
3356 && bfd_link_executable (info)
3358 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
3360 h->got.offset = (bfd_vma) -1;
3362 else if (h->got.refcount > 0)
3366 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
3368 /* Make sure this symbol is output as a dynamic symbol.
3369 Undefined weak syms won't yet be marked as dynamic. */
3370 if (h->dynindx == -1
3372 && !resolved_to_zero
3373 && h->root.type == bfd_link_hash_undefweak)
3375 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3379 if (GOT_TLS_GDESC_P (tls_type))
3381 eh->tlsdesc_got = htab->elf.sgotplt->size
3382 - elf_x86_64_compute_jump_table_size (htab);
3383 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3384 h->got.offset = (bfd_vma) -2;
3386 if (! GOT_TLS_GDESC_P (tls_type)
3387 || GOT_TLS_GD_P (tls_type))
3390 h->got.offset = s->size;
3391 s->size += GOT_ENTRY_SIZE;
3392 if (GOT_TLS_GD_P (tls_type))
3393 s->size += GOT_ENTRY_SIZE;
3395 dyn = htab->elf.dynamic_sections_created;
3396 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
3397 and two if global. R_X86_64_GOTTPOFF needs one dynamic
3398 relocation. No dynamic relocation against resolved undefined
3399 weak symbol in executable. */
3400 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
3401 || tls_type == GOT_TLS_IE)
3402 htab->elf.srelgot->size += bed->s->sizeof_rela;
3403 else if (GOT_TLS_GD_P (tls_type))
3404 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
3405 else if (! GOT_TLS_GDESC_P (tls_type)
3406 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3407 && !resolved_to_zero)
3408 || h->root.type != bfd_link_hash_undefweak)
3409 && (bfd_link_pic (info)
3410 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
3411 htab->elf.srelgot->size += bed->s->sizeof_rela;
3412 if (GOT_TLS_GDESC_P (tls_type))
3414 htab->elf.srelplt->size += bed->s->sizeof_rela;
3415 htab->tlsdesc_plt = (bfd_vma) -1;
3419 h->got.offset = (bfd_vma) -1;
3421 if (eh->dyn_relocs == NULL)
3424 /* In the shared -Bsymbolic case, discard space allocated for
3425 dynamic pc-relative relocs against symbols which turn out to be
3426 defined in regular objects. For the normal shared case, discard
3427 space for pc-relative relocs that have become local due to symbol
3428 visibility changes. */
3430 if (bfd_link_pic (info))
3432 /* Relocs that use pc_count are those that appear on a call
3433 insn, or certain REL relocs that can generated via assembly.
3434 We want calls to protected symbols to resolve directly to the
3435 function rather than going via the plt. If people want
3436 function pointer comparisons to work as expected then they
3437 should avoid writing weird assembly. */
3438 if (SYMBOL_CALLS_LOCAL (info, h))
3440 struct elf_dyn_relocs **pp;
3442 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3444 p->count -= p->pc_count;
3453 /* Also discard relocs on undefined weak syms with non-default
3454 visibility or in PIE. */
3455 if (eh->dyn_relocs != NULL)
3457 if (h->root.type == bfd_link_hash_undefweak)
3459 /* Undefined weak symbol is never bound locally in shared
3461 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3462 || resolved_to_zero)
3463 eh->dyn_relocs = NULL;
3464 else if (h->dynindx == -1
3465 && ! h->forced_local
3466 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3469 /* For PIE, discard space for pc-relative relocs against
3470 symbols which turn out to need copy relocs. */
3471 else if (bfd_link_executable (info)
3472 && (h->needs_copy || eh->needs_copy)
3476 struct elf_dyn_relocs **pp;
3478 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3480 if (p->pc_count != 0)
3488 else if (ELIMINATE_COPY_RELOCS)
3490 /* For the non-shared case, discard space for relocs against
3491 symbols which turn out to need copy relocs or are not
3492 dynamic. Keep dynamic relocations for run-time function
3493 pointer initialization. */
3495 if ((!h->non_got_ref
3496 || eh->func_pointer_refcount > 0
3497 || (h->root.type == bfd_link_hash_undefweak
3498 && !resolved_to_zero))
3501 || (htab->elf.dynamic_sections_created
3502 && (h->root.type == bfd_link_hash_undefweak
3503 || h->root.type == bfd_link_hash_undefined))))
3505 /* Make sure this symbol is output as a dynamic symbol.
3506 Undefined weak syms won't yet be marked as dynamic. */
3507 if (h->dynindx == -1
3508 && ! h->forced_local
3509 && ! resolved_to_zero
3510 && h->root.type == bfd_link_hash_undefweak
3511 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3514 /* If that succeeded, we know we'll be keeping all the
3516 if (h->dynindx != -1)
3520 eh->dyn_relocs = NULL;
3521 eh->func_pointer_refcount = 0;
3526 /* Finally, allocate space. */
3527 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3531 sreloc = elf_section_data (p->sec)->sreloc;
3533 BFD_ASSERT (sreloc != NULL);
3535 sreloc->size += p->count * bed->s->sizeof_rela;
3541 /* Allocate space in .plt, .got and associated reloc sections for
3542 local dynamic relocs. */
3545 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
3547 struct elf_link_hash_entry *h
3548 = (struct elf_link_hash_entry *) *slot;
3550 if (h->type != STT_GNU_IFUNC
3554 || h->root.type != bfd_link_hash_defined)
3557 return elf_x86_64_allocate_dynrelocs (h, inf);
3560 /* Find any dynamic relocs that apply to read-only sections. */
3563 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
3566 struct elf_x86_64_link_hash_entry *eh;
3567 struct elf_dyn_relocs *p;
3569 /* Skip local IFUNC symbols. */
3570 if (h->forced_local && h->type == STT_GNU_IFUNC)
3573 eh = (struct elf_x86_64_link_hash_entry *) h;
3574 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3576 asection *s = p->sec->output_section;
3578 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3580 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3582 info->flags |= DF_TEXTREL;
3584 if ((info->warn_shared_textrel && bfd_link_pic (info))
3585 || info->error_textrel)
3586 /* xgettext:c-format */
3587 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3588 p->sec->owner, h->root.root.string,
3591 /* Not an error, just cut short the traversal. */
3598 /* Convert load via the GOT slot to load immediate. */
3601 elf_x86_64_convert_load (bfd *abfd, asection *sec,
3602 struct bfd_link_info *link_info)
3604 Elf_Internal_Shdr *symtab_hdr;
3605 Elf_Internal_Rela *internal_relocs;
3606 Elf_Internal_Rela *irel, *irelend;
3608 struct elf_x86_64_link_hash_table *htab;
3609 bfd_boolean changed;
3610 bfd_signed_vma *local_got_refcounts;
3612 /* Don't even try to convert non-ELF outputs. */
3613 if (!is_elf_hash_table (link_info->hash))
3616 /* Nothing to do if there is no need or no output. */
3617 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3618 || sec->need_convert_load == 0
3619 || bfd_is_abs_section (sec->output_section))
3622 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3624 /* Load the relocations for this section. */
3625 internal_relocs = (_bfd_elf_link_read_relocs
3626 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3627 link_info->keep_memory));
3628 if (internal_relocs == NULL)
3632 htab = elf_x86_64_hash_table (link_info);
3633 local_got_refcounts = elf_local_got_refcounts (abfd);
3635 /* Get the section contents. */
3636 if (elf_section_data (sec)->this_hdr.contents != NULL)
3637 contents = elf_section_data (sec)->this_hdr.contents;
3640 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3644 irelend = internal_relocs + sec->reloc_count;
3645 for (irel = internal_relocs; irel < irelend; irel++)
3647 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3648 unsigned int r_symndx;
3649 struct elf_link_hash_entry *h;
3650 bfd_boolean converted;
3652 if (r_type != R_X86_64_GOTPCRELX
3653 && r_type != R_X86_64_REX_GOTPCRELX
3654 && r_type != R_X86_64_GOTPCREL)
3657 r_symndx = htab->r_sym (irel->r_info);
3658 if (r_symndx < symtab_hdr->sh_info)
3659 h = elf_x86_64_get_local_sym_hash (htab, sec->owner,
3660 (const Elf_Internal_Rela *) irel,
3664 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
3665 while (h->root.type == bfd_link_hash_indirect
3666 || h->root.type == bfd_link_hash_warning)
3667 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3670 /* STT_GNU_IFUNC must keep GOTPCREL relocations. */
3671 if (h != NULL && h->type == STT_GNU_IFUNC)
3675 if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h,
3676 &converted, link_info))
3681 changed = converted;
3684 if (h->got.refcount > 0)
3685 h->got.refcount -= 1;
3689 if (local_got_refcounts != NULL
3690 && local_got_refcounts[r_symndx] > 0)
3691 local_got_refcounts[r_symndx] -= 1;
3696 if (contents != NULL
3697 && elf_section_data (sec)->this_hdr.contents != contents)
3699 if (!changed && !link_info->keep_memory)
3703 /* Cache the section contents for elf_link_input_bfd. */
3704 elf_section_data (sec)->this_hdr.contents = contents;
3708 if (elf_section_data (sec)->relocs != internal_relocs)
3711 free (internal_relocs);
3713 elf_section_data (sec)->relocs = internal_relocs;
3719 if (contents != NULL
3720 && elf_section_data (sec)->this_hdr.contents != contents)
3722 if (internal_relocs != NULL
3723 && elf_section_data (sec)->relocs != internal_relocs)
3724 free (internal_relocs);
3728 /* Set the sizes of the dynamic sections. */
3731 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
3732 struct bfd_link_info *info)
3734 struct elf_x86_64_link_hash_table *htab;
3739 const struct elf_backend_data *bed;
3741 htab = elf_x86_64_hash_table (info);
3744 bed = get_elf_backend_data (output_bfd);
3746 dynobj = htab->elf.dynobj;
3750 /* Set up .got offsets for local syms, and space for local dynamic
3752 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3754 bfd_signed_vma *local_got;
3755 bfd_signed_vma *end_local_got;
3756 char *local_tls_type;
3757 bfd_vma *local_tlsdesc_gotent;
3758 bfd_size_type locsymcount;
3759 Elf_Internal_Shdr *symtab_hdr;
3762 if (! is_x86_64_elf (ibfd))
3765 for (s = ibfd->sections; s != NULL; s = s->next)
3767 struct elf_dyn_relocs *p;
3769 if (!elf_x86_64_convert_load (ibfd, s, info))
3772 for (p = (struct elf_dyn_relocs *)
3773 (elf_section_data (s)->local_dynrel);
3777 if (!bfd_is_abs_section (p->sec)
3778 && bfd_is_abs_section (p->sec->output_section))
3780 /* Input section has been discarded, either because
3781 it is a copy of a linkonce section or due to
3782 linker script /DISCARD/, so we'll be discarding
3785 else if (p->count != 0)
3787 srel = elf_section_data (p->sec)->sreloc;
3788 srel->size += p->count * bed->s->sizeof_rela;
3789 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3790 && (info->flags & DF_TEXTREL) == 0)
3792 info->flags |= DF_TEXTREL;
3793 if ((info->warn_shared_textrel && bfd_link_pic (info))
3794 || info->error_textrel)
3795 /* xgettext:c-format */
3796 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3797 p->sec->owner, p->sec);
3803 local_got = elf_local_got_refcounts (ibfd);
3807 symtab_hdr = &elf_symtab_hdr (ibfd);
3808 locsymcount = symtab_hdr->sh_info;
3809 end_local_got = local_got + locsymcount;
3810 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
3811 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
3813 srel = htab->elf.srelgot;
3814 for (; local_got < end_local_got;
3815 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3817 *local_tlsdesc_gotent = (bfd_vma) -1;
3820 if (GOT_TLS_GDESC_P (*local_tls_type))
3822 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3823 - elf_x86_64_compute_jump_table_size (htab);
3824 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3825 *local_got = (bfd_vma) -2;
3827 if (! GOT_TLS_GDESC_P (*local_tls_type)
3828 || GOT_TLS_GD_P (*local_tls_type))
3830 *local_got = s->size;
3831 s->size += GOT_ENTRY_SIZE;
3832 if (GOT_TLS_GD_P (*local_tls_type))
3833 s->size += GOT_ENTRY_SIZE;
3835 if (bfd_link_pic (info)
3836 || GOT_TLS_GD_ANY_P (*local_tls_type)
3837 || *local_tls_type == GOT_TLS_IE)
3839 if (GOT_TLS_GDESC_P (*local_tls_type))
3841 htab->elf.srelplt->size
3842 += bed->s->sizeof_rela;
3843 htab->tlsdesc_plt = (bfd_vma) -1;
3845 if (! GOT_TLS_GDESC_P (*local_tls_type)
3846 || GOT_TLS_GD_P (*local_tls_type))
3847 srel->size += bed->s->sizeof_rela;
3851 *local_got = (bfd_vma) -1;
3855 if (htab->tls_ld_got.refcount > 0)
3857 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3859 htab->tls_ld_got.offset = htab->elf.sgot->size;
3860 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
3861 htab->elf.srelgot->size += bed->s->sizeof_rela;
3864 htab->tls_ld_got.offset = -1;
3866 /* Allocate global sym .plt and .got entries, and space for global
3867 sym dynamic relocs. */
3868 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
3871 /* Allocate .plt and .got entries, and space for local symbols. */
3872 htab_traverse (htab->loc_hash_table,
3873 elf_x86_64_allocate_local_dynrelocs,
3876 /* For every jump slot reserved in the sgotplt, reloc_count is
3877 incremented. However, when we reserve space for TLS descriptors,
3878 it's not incremented, so in order to compute the space reserved
3879 for them, it suffices to multiply the reloc count by the jump
3882 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3883 so that R_X86_64_IRELATIVE entries come last. */
3884 if (htab->elf.srelplt)
3886 htab->sgotplt_jump_table_size
3887 = elf_x86_64_compute_jump_table_size (htab);
3888 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3890 else if (htab->elf.irelplt)
3891 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3893 if (htab->tlsdesc_plt)
3895 /* If we're not using lazy TLS relocations, don't generate the
3896 PLT and GOT entries they require. */
3897 if ((info->flags & DF_BIND_NOW))
3898 htab->tlsdesc_plt = 0;
3901 htab->tlsdesc_got = htab->elf.sgot->size;
3902 htab->elf.sgot->size += GOT_ENTRY_SIZE;
3903 /* Reserve room for the initial entry.
3904 FIXME: we could probably do away with it in this case. */
3905 if (htab->elf.splt->size == 0)
3906 htab->elf.splt->size = htab->plt.plt_entry_size;
3907 htab->tlsdesc_plt = htab->elf.splt->size;
3908 htab->elf.splt->size += htab->plt.plt_entry_size;
3912 if (htab->elf.sgotplt)
3914 /* Don't allocate .got.plt section if there are no GOT nor PLT
3915 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3916 if ((htab->elf.hgot == NULL
3917 || !htab->elf.hgot->ref_regular_nonweak)
3918 && (htab->elf.sgotplt->size
3919 == get_elf_backend_data (output_bfd)->got_header_size)
3920 && (htab->elf.splt == NULL
3921 || htab->elf.splt->size == 0)
3922 && (htab->elf.sgot == NULL
3923 || htab->elf.sgot->size == 0)
3924 && (htab->elf.iplt == NULL
3925 || htab->elf.iplt->size == 0)
3926 && (htab->elf.igotplt == NULL
3927 || htab->elf.igotplt->size == 0))
3928 htab->elf.sgotplt->size = 0;
3931 if (_bfd_elf_eh_frame_present (info))
3933 if (htab->plt_eh_frame != NULL
3934 && htab->elf.splt != NULL
3935 && htab->elf.splt->size != 0
3936 && !bfd_is_abs_section (htab->elf.splt->output_section))
3937 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
3939 if (htab->plt_got_eh_frame != NULL
3940 && htab->plt_got != NULL
3941 && htab->plt_got->size != 0
3942 && !bfd_is_abs_section (htab->plt_got->output_section))
3943 htab->plt_got_eh_frame->size
3944 = htab->non_lazy_plt->eh_frame_plt_size;
3946 /* Unwind info for the second PLT and .plt.got sections are
3948 if (htab->plt_second_eh_frame != NULL
3949 && htab->plt_second != NULL
3950 && htab->plt_second->size != 0
3951 && !bfd_is_abs_section (htab->plt_second->output_section))
3952 htab->plt_second_eh_frame->size
3953 = htab->non_lazy_plt->eh_frame_plt_size;
3956 /* We now have determined the sizes of the various dynamic sections.
3957 Allocate memory for them. */
3959 for (s = dynobj->sections; s != NULL; s = s->next)
3961 if ((s->flags & SEC_LINKER_CREATED) == 0)
3964 if (s == htab->elf.splt
3965 || s == htab->elf.sgot
3966 || s == htab->elf.sgotplt
3967 || s == htab->elf.iplt
3968 || s == htab->elf.igotplt
3969 || s == htab->plt_second
3970 || s == htab->plt_got
3971 || s == htab->plt_eh_frame
3972 || s == htab->plt_got_eh_frame
3973 || s == htab->plt_second_eh_frame
3974 || s == htab->elf.sdynbss
3975 || s == htab->elf.sdynrelro)
3977 /* Strip this section if we don't need it; see the
3980 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
3982 if (s->size != 0 && s != htab->elf.srelplt)
3985 /* We use the reloc_count field as a counter if we need
3986 to copy relocs into the output file. */
3987 if (s != htab->elf.srelplt)
3992 /* It's not one of our sections, so don't allocate space. */
3998 /* If we don't need this section, strip it from the
3999 output file. This is mostly to handle .rela.bss and
4000 .rela.plt. We must create both sections in
4001 create_dynamic_sections, because they must be created
4002 before the linker maps input sections to output
4003 sections. The linker does that before
4004 adjust_dynamic_symbol is called, and it is that
4005 function which decides whether anything needs to go
4006 into these sections. */
4008 s->flags |= SEC_EXCLUDE;
4012 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4015 /* Allocate memory for the section contents. We use bfd_zalloc
4016 here in case unused entries are not reclaimed before the
4017 section's contents are written out. This should not happen,
4018 but this way if it does, we get a R_X86_64_NONE reloc instead
4020 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4021 if (s->contents == NULL)
4025 if (htab->plt_eh_frame != NULL
4026 && htab->plt_eh_frame->contents != NULL)
4028 memcpy (htab->plt_eh_frame->contents,
4029 htab->plt.eh_frame_plt, htab->plt_eh_frame->size);
4030 bfd_put_32 (dynobj, htab->elf.splt->size,
4031 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
4034 if (htab->plt_got_eh_frame != NULL
4035 && htab->plt_got_eh_frame->contents != NULL)
4037 memcpy (htab->plt_got_eh_frame->contents,
4038 htab->non_lazy_plt->eh_frame_plt,
4039 htab->plt_got_eh_frame->size);
4040 bfd_put_32 (dynobj, htab->plt_got->size,
4041 (htab->plt_got_eh_frame->contents
4042 + PLT_FDE_LEN_OFFSET));
4045 if (htab->plt_second_eh_frame != NULL
4046 && htab->plt_second_eh_frame->contents != NULL)
4048 memcpy (htab->plt_second_eh_frame->contents,
4049 htab->non_lazy_plt->eh_frame_plt,
4050 htab->plt_second_eh_frame->size);
4051 bfd_put_32 (dynobj, htab->plt_second->size,
4052 (htab->plt_second_eh_frame->contents
4053 + PLT_FDE_LEN_OFFSET));
4056 if (htab->elf.dynamic_sections_created)
4058 /* Add some entries to the .dynamic section. We fill in the
4059 values later, in elf_x86_64_finish_dynamic_sections, but we
4060 must add the entries now so that we get the correct size for
4061 the .dynamic section. The DT_DEBUG entry is filled in by the
4062 dynamic linker and used by the debugger. */
4063 #define add_dynamic_entry(TAG, VAL) \
4064 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4066 if (bfd_link_executable (info))
4068 if (!add_dynamic_entry (DT_DEBUG, 0))
4072 if (htab->elf.splt->size != 0)
4074 /* DT_PLTGOT is used by prelink even if there is no PLT
4076 if (!add_dynamic_entry (DT_PLTGOT, 0))
4080 if (htab->elf.srelplt->size != 0)
4082 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
4083 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4084 || !add_dynamic_entry (DT_JMPREL, 0))
4088 if (htab->tlsdesc_plt
4089 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
4090 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
4095 if (!add_dynamic_entry (DT_RELA, 0)
4096 || !add_dynamic_entry (DT_RELASZ, 0)
4097 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
4100 /* If any dynamic relocs apply to a read-only section,
4101 then we need a DT_TEXTREL entry. */
4102 if ((info->flags & DF_TEXTREL) == 0)
4103 elf_link_hash_traverse (&htab->elf,
4104 elf_x86_64_readonly_dynrelocs,
4107 if ((info->flags & DF_TEXTREL) != 0)
4109 if (htab->readonly_dynrelocs_against_ifunc)
4111 info->callbacks->einfo
4112 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
4113 bfd_set_error (bfd_error_bad_value);
4117 if (!add_dynamic_entry (DT_TEXTREL, 0))
4122 #undef add_dynamic_entry
4128 elf_x86_64_always_size_sections (bfd *output_bfd,
4129 struct bfd_link_info *info)
4131 asection *tls_sec = elf_hash_table (info)->tls_sec;
4135 struct elf_link_hash_entry *tlsbase;
4137 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
4138 "_TLS_MODULE_BASE_",
4139 FALSE, FALSE, FALSE);
4141 if (tlsbase && tlsbase->type == STT_TLS)
4143 struct elf_x86_64_link_hash_table *htab;
4144 struct bfd_link_hash_entry *bh = NULL;
4145 const struct elf_backend_data *bed
4146 = get_elf_backend_data (output_bfd);
4148 htab = elf_x86_64_hash_table (info);
4152 if (!(_bfd_generic_link_add_one_symbol
4153 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
4154 tls_sec, 0, NULL, FALSE,
4155 bed->collect, &bh)))
4158 htab->tls_module_base = bh;
4160 tlsbase = (struct elf_link_hash_entry *)bh;
4161 tlsbase->def_regular = 1;
4162 tlsbase->other = STV_HIDDEN;
4163 tlsbase->root.linker_def = 1;
4164 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
4171 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
4172 executables. Rather than setting it to the beginning of the TLS
4173 section, we have to set it to the end. This function may be called
4174 multiple times, it is idempotent. */
4177 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
4179 struct elf_x86_64_link_hash_table *htab;
4180 struct bfd_link_hash_entry *base;
4182 if (!bfd_link_executable (info))
4185 htab = elf_x86_64_hash_table (info);
4189 base = htab->tls_module_base;
4193 base->u.def.value = htab->elf.tls_size;
4196 /* Return the base VMA address which should be subtracted from real addresses
4197 when resolving @dtpoff relocation.
4198 This is PT_TLS segment p_vaddr. */
4201 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
4203 /* If tls_sec is NULL, we should have signalled an error already. */
4204 if (elf_hash_table (info)->tls_sec == NULL)
4206 return elf_hash_table (info)->tls_sec->vma;
4209 /* Return the relocation value for @tpoff relocation
4210 if STT_TLS virtual address is ADDRESS. */
4213 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
4215 struct elf_link_hash_table *htab = elf_hash_table (info);
4216 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
4217 bfd_vma static_tls_size;
4219 /* If tls_segment is NULL, we should have signalled an error already. */
4220 if (htab->tls_sec == NULL)
4223 /* Consider special static TLS alignment requirements. */
4224 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
4225 return address - static_tls_size - htab->tls_sec->vma;
4228 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
4232 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
4234 /* Opcode Instruction
4237 0x0f 0x8x conditional jump */
4239 && (contents [offset - 1] == 0xe8
4240 || contents [offset - 1] == 0xe9))
4242 && contents [offset - 2] == 0x0f
4243 && (contents [offset - 1] & 0xf0) == 0x80));
4246 /* Relocate an x86_64 ELF section. */
4249 elf_x86_64_relocate_section (bfd *output_bfd,
4250 struct bfd_link_info *info,
4252 asection *input_section,
4254 Elf_Internal_Rela *relocs,
4255 Elf_Internal_Sym *local_syms,
4256 asection **local_sections)
4258 struct elf_x86_64_link_hash_table *htab;
4259 Elf_Internal_Shdr *symtab_hdr;
4260 struct elf_link_hash_entry **sym_hashes;
4261 bfd_vma *local_got_offsets;
4262 bfd_vma *local_tlsdesc_gotents;
4263 Elf_Internal_Rela *rel;
4264 Elf_Internal_Rela *wrel;
4265 Elf_Internal_Rela *relend;
4266 unsigned int plt_entry_size;
4268 BFD_ASSERT (is_x86_64_elf (input_bfd));
4270 /* Skip if check_relocs failed. */
4271 if (input_section->check_relocs_failed)
4274 htab = elf_x86_64_hash_table (info);
4277 plt_entry_size = htab->plt.plt_entry_size;
4278 symtab_hdr = &elf_symtab_hdr (input_bfd);
4279 sym_hashes = elf_sym_hashes (input_bfd);
4280 local_got_offsets = elf_local_got_offsets (input_bfd);
4281 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
4283 elf_x86_64_set_tls_module_base (info);
4285 rel = wrel = relocs;
4286 relend = relocs + input_section->reloc_count;
4287 for (; rel < relend; wrel++, rel++)
4289 unsigned int r_type;
4290 reloc_howto_type *howto;
4291 unsigned long r_symndx;
4292 struct elf_link_hash_entry *h;
4293 struct elf_x86_64_link_hash_entry *eh;
4294 Elf_Internal_Sym *sym;
4296 bfd_vma off, offplt, plt_offset;
4298 bfd_boolean unresolved_reloc;
4299 bfd_reloc_status_type r;
4301 asection *base_got, *resolved_plt;
4303 bfd_boolean resolved_to_zero;
4304 bfd_boolean relative_reloc;
4306 r_type = ELF32_R_TYPE (rel->r_info);
4307 if (r_type == (int) R_X86_64_GNU_VTINHERIT
4308 || r_type == (int) R_X86_64_GNU_VTENTRY)
4315 if (r_type >= (int) R_X86_64_standard)
4318 /* xgettext:c-format */
4319 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
4320 input_bfd, r_type, input_section);
4321 bfd_set_error (bfd_error_bad_value);
4325 if (r_type != (int) R_X86_64_32
4326 || ABI_64_P (output_bfd))
4327 howto = x86_64_elf_howto_table + r_type;
4329 howto = (x86_64_elf_howto_table
4330 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
4331 r_symndx = htab->r_sym (rel->r_info);
4335 unresolved_reloc = FALSE;
4336 if (r_symndx < symtab_hdr->sh_info)
4338 sym = local_syms + r_symndx;
4339 sec = local_sections[r_symndx];
4341 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
4343 st_size = sym->st_size;
4345 /* Relocate against local STT_GNU_IFUNC symbol. */
4346 if (!bfd_link_relocatable (info)
4347 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4349 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
4354 /* Set STT_GNU_IFUNC symbol value. */
4355 h->root.u.def.value = sym->st_value;
4356 h->root.u.def.section = sec;
4361 bfd_boolean warned ATTRIBUTE_UNUSED;
4362 bfd_boolean ignored ATTRIBUTE_UNUSED;
4364 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4365 r_symndx, symtab_hdr, sym_hashes,
4367 unresolved_reloc, warned, ignored);
4371 if (sec != NULL && discarded_section (sec))
4373 _bfd_clear_contents (howto, input_bfd, input_section,
4374 contents + rel->r_offset);
4375 wrel->r_offset = rel->r_offset;
4379 /* For ld -r, remove relocations in debug sections against
4380 sections defined in discarded sections. Not done for
4381 eh_frame editing code expects to be present. */
4382 if (bfd_link_relocatable (info)
4383 && (input_section->flags & SEC_DEBUGGING))
4389 if (bfd_link_relocatable (info))
4396 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
4398 if (r_type == R_X86_64_64)
4400 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
4401 zero-extend it to 64bit if addend is zero. */
4402 r_type = R_X86_64_32;
4403 memset (contents + rel->r_offset + 4, 0, 4);
4405 else if (r_type == R_X86_64_SIZE64)
4407 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
4408 zero-extend it to 64bit if addend is zero. */
4409 r_type = R_X86_64_SIZE32;
4410 memset (contents + rel->r_offset + 4, 0, 4);
4414 eh = (struct elf_x86_64_link_hash_entry *) h;
4416 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4417 it here if it is defined in a non-shared object. */
4419 && h->type == STT_GNU_IFUNC
4425 if ((input_section->flags & SEC_ALLOC) == 0)
4427 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4428 sections because such sections are not SEC_ALLOC and
4429 thus ld.so will not process them. */
4430 if ((input_section->flags & SEC_DEBUGGING) != 0)
4440 case R_X86_64_GOTPCREL:
4441 case R_X86_64_GOTPCRELX:
4442 case R_X86_64_REX_GOTPCRELX:
4443 case R_X86_64_GOTPCREL64:
4444 base_got = htab->elf.sgot;
4445 off = h->got.offset;
4447 if (base_got == NULL)
4450 if (off == (bfd_vma) -1)
4452 /* We can't use h->got.offset here to save state, or
4453 even just remember the offset, as finish_dynamic_symbol
4454 would use that as offset into .got. */
4456 if (h->plt.offset == (bfd_vma) -1)
4459 if (htab->elf.splt != NULL)
4461 plt_index = (h->plt.offset / plt_entry_size
4462 - htab->plt.has_plt0);
4463 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4464 base_got = htab->elf.sgotplt;
4468 plt_index = h->plt.offset / plt_entry_size;
4469 off = plt_index * GOT_ENTRY_SIZE;
4470 base_got = htab->elf.igotplt;
4473 if (h->dynindx == -1
4477 /* This references the local defitionion. We must
4478 initialize this entry in the global offset table.
4479 Since the offset must always be a multiple of 8,
4480 we use the least significant bit to record
4481 whether we have initialized it already.
4483 When doing a dynamic link, we create a .rela.got
4484 relocation entry to initialize the value. This
4485 is done in the finish_dynamic_symbol routine. */
4490 bfd_put_64 (output_bfd, relocation,
4491 base_got->contents + off);
4492 /* Note that this is harmless for the GOTPLT64
4493 case, as -1 | 1 still is -1. */
4499 relocation = (base_got->output_section->vma
4500 + base_got->output_offset + off);
4505 if (h->plt.offset == (bfd_vma) -1)
4507 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4508 if (r_type == htab->pointer_r_type
4509 && (input_section->flags & SEC_CODE) == 0)
4510 goto do_ifunc_pointer;
4511 goto bad_ifunc_reloc;
4514 /* STT_GNU_IFUNC symbol must go through PLT. */
4515 if (htab->elf.splt != NULL)
4517 if (htab->plt_second != NULL)
4519 resolved_plt = htab->plt_second;
4520 plt_offset = eh->plt_second.offset;
4524 resolved_plt = htab->elf.splt;
4525 plt_offset = h->plt.offset;
4530 resolved_plt = htab->elf.iplt;
4531 plt_offset = h->plt.offset;
4534 relocation = (resolved_plt->output_section->vma
4535 + resolved_plt->output_offset + plt_offset);
4541 if (h->root.root.string)
4542 name = h->root.root.string;
4544 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4547 /* xgettext:c-format */
4548 (_("%B: relocation %s against STT_GNU_IFUNC "
4549 "symbol `%s' isn't supported"), input_bfd,
4551 bfd_set_error (bfd_error_bad_value);
4555 if (bfd_link_pic (info))
4560 if (ABI_64_P (output_bfd))
4565 if (rel->r_addend != 0)
4567 if (h->root.root.string)
4568 name = h->root.root.string;
4570 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4573 /* xgettext:c-format */
4574 (_("%B: relocation %s against STT_GNU_IFUNC "
4575 "symbol `%s' has non-zero addend: %d"),
4576 input_bfd, howto->name, name, rel->r_addend);
4577 bfd_set_error (bfd_error_bad_value);
4581 /* Generate dynamic relcoation only when there is a
4582 non-GOT reference in a shared object or there is no
4584 if ((bfd_link_pic (info) && h->non_got_ref)
4585 || h->plt.offset == (bfd_vma) -1)
4587 Elf_Internal_Rela outrel;
4590 /* Need a dynamic relocation to get the real function
4592 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4596 if (outrel.r_offset == (bfd_vma) -1
4597 || outrel.r_offset == (bfd_vma) -2)
4600 outrel.r_offset += (input_section->output_section->vma
4601 + input_section->output_offset);
4603 if (h->dynindx == -1
4605 || bfd_link_executable (info))
4607 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4608 h->root.root.string,
4609 h->root.u.def.section->owner);
4611 /* This symbol is resolved locally. */
4612 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4613 outrel.r_addend = (h->root.u.def.value
4614 + h->root.u.def.section->output_section->vma
4615 + h->root.u.def.section->output_offset);
4619 outrel.r_info = htab->r_info (h->dynindx, r_type);
4620 outrel.r_addend = 0;
4623 /* Dynamic relocations are stored in
4624 1. .rela.ifunc section in PIC object.
4625 2. .rela.got section in dynamic executable.
4626 3. .rela.iplt section in static executable. */
4627 if (bfd_link_pic (info))
4628 sreloc = htab->elf.irelifunc;
4629 else if (htab->elf.splt != NULL)
4630 sreloc = htab->elf.srelgot;
4632 sreloc = htab->elf.irelplt;
4633 elf_append_rela (output_bfd, sreloc, &outrel);
4635 /* If this reloc is against an external symbol, we
4636 do not want to fiddle with the addend. Otherwise,
4637 we need to include the symbol value so that it
4638 becomes an addend for the dynamic reloc. For an
4639 internal symbol, we have updated addend. */
4644 case R_X86_64_PC32_BND:
4646 case R_X86_64_PLT32:
4647 case R_X86_64_PLT32_BND:
4652 resolved_to_zero = (eh != NULL
4653 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4657 /* When generating a shared object, the relocations handled here are
4658 copied into the output file to be resolved at run time. */
4661 case R_X86_64_GOT32:
4662 case R_X86_64_GOT64:
4663 /* Relocation is to the entry for this symbol in the global
4665 case R_X86_64_GOTPCREL:
4666 case R_X86_64_GOTPCRELX:
4667 case R_X86_64_REX_GOTPCRELX:
4668 case R_X86_64_GOTPCREL64:
4669 /* Use global offset table entry as symbol value. */
4670 case R_X86_64_GOTPLT64:
4671 /* This is obsolete and treated the the same as GOT64. */
4672 base_got = htab->elf.sgot;
4674 if (htab->elf.sgot == NULL)
4677 relative_reloc = FALSE;
4682 off = h->got.offset;
4684 && h->plt.offset != (bfd_vma)-1
4685 && off == (bfd_vma)-1)
4687 /* We can't use h->got.offset here to save
4688 state, or even just remember the offset, as
4689 finish_dynamic_symbol would use that as offset into
4691 bfd_vma plt_index = (h->plt.offset / plt_entry_size
4692 - htab->plt.has_plt0);
4693 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4694 base_got = htab->elf.sgotplt;
4697 dyn = htab->elf.dynamic_sections_created;
4699 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4700 || (bfd_link_pic (info)
4701 && SYMBOL_REFERENCES_LOCAL (info, h))
4702 || (ELF_ST_VISIBILITY (h->other)
4703 && h->root.type == bfd_link_hash_undefweak))
4705 /* This is actually a static link, or it is a -Bsymbolic
4706 link and the symbol is defined locally, or the symbol
4707 was forced to be local because of a version file. We
4708 must initialize this entry in the global offset table.
4709 Since the offset must always be a multiple of 8, we
4710 use the least significant bit to record whether we
4711 have initialized it already.
4713 When doing a dynamic link, we create a .rela.got
4714 relocation entry to initialize the value. This is
4715 done in the finish_dynamic_symbol routine. */
4720 bfd_put_64 (output_bfd, relocation,
4721 base_got->contents + off);
4722 /* Note that this is harmless for the GOTPLT64 case,
4723 as -1 | 1 still is -1. */
4726 if (h->dynindx == -1
4728 && h->root.type != bfd_link_hash_undefweak
4729 && bfd_link_pic (info))
4731 /* If this symbol isn't dynamic in PIC,
4732 generate R_X86_64_RELATIVE here. */
4733 eh->no_finish_dynamic_symbol = 1;
4734 relative_reloc = TRUE;
4739 unresolved_reloc = FALSE;
4743 if (local_got_offsets == NULL)
4746 off = local_got_offsets[r_symndx];
4748 /* The offset must always be a multiple of 8. We use
4749 the least significant bit to record whether we have
4750 already generated the necessary reloc. */
4755 bfd_put_64 (output_bfd, relocation,
4756 base_got->contents + off);
4757 local_got_offsets[r_symndx] |= 1;
4759 if (bfd_link_pic (info))
4760 relative_reloc = TRUE;
4767 Elf_Internal_Rela outrel;
4769 /* We need to generate a R_X86_64_RELATIVE reloc
4770 for the dynamic linker. */
4771 s = htab->elf.srelgot;
4775 outrel.r_offset = (base_got->output_section->vma
4776 + base_got->output_offset
4778 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4779 outrel.r_addend = relocation;
4780 elf_append_rela (output_bfd, s, &outrel);
4783 if (off >= (bfd_vma) -2)
4786 relocation = base_got->output_section->vma
4787 + base_got->output_offset + off;
4788 if (r_type != R_X86_64_GOTPCREL
4789 && r_type != R_X86_64_GOTPCRELX
4790 && r_type != R_X86_64_REX_GOTPCRELX
4791 && r_type != R_X86_64_GOTPCREL64)
4792 relocation -= htab->elf.sgotplt->output_section->vma
4793 - htab->elf.sgotplt->output_offset;
4797 case R_X86_64_GOTOFF64:
4798 /* Relocation is relative to the start of the global offset
4801 /* Check to make sure it isn't a protected function or data
4802 symbol for shared library since it may not be local when
4803 used as function address or with copy relocation. We also
4804 need to make sure that a symbol is referenced locally. */
4805 if (bfd_link_pic (info) && h)
4807 if (!h->def_regular)
4811 switch (ELF_ST_VISIBILITY (h->other))
4814 v = _("hidden symbol");
4817 v = _("internal symbol");
4820 v = _("protected symbol");
4828 /* xgettext:c-format */
4829 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
4830 " `%s' can not be used when making a shared object"),
4831 input_bfd, v, h->root.root.string);
4832 bfd_set_error (bfd_error_bad_value);
4835 else if (!bfd_link_executable (info)
4836 && !SYMBOL_REFERENCES_LOCAL (info, h)
4837 && (h->type == STT_FUNC
4838 || h->type == STT_OBJECT)
4839 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4842 /* xgettext:c-format */
4843 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
4844 " `%s' can not be used when making a shared object"),
4846 h->type == STT_FUNC ? "function" : "data",
4847 h->root.root.string);
4848 bfd_set_error (bfd_error_bad_value);
4853 /* Note that sgot is not involved in this
4854 calculation. We always want the start of .got.plt. If we
4855 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4856 permitted by the ABI, we might have to change this
4858 relocation -= htab->elf.sgotplt->output_section->vma
4859 + htab->elf.sgotplt->output_offset;
4862 case R_X86_64_GOTPC32:
4863 case R_X86_64_GOTPC64:
4864 /* Use global offset table as symbol value. */
4865 relocation = htab->elf.sgotplt->output_section->vma
4866 + htab->elf.sgotplt->output_offset;
4867 unresolved_reloc = FALSE;
4870 case R_X86_64_PLTOFF64:
4871 /* Relocation is PLT entry relative to GOT. For local
4872 symbols it's the symbol itself relative to GOT. */
4874 /* See PLT32 handling. */
4875 && (h->plt.offset != (bfd_vma) -1
4876 || eh->plt_got.offset != (bfd_vma) -1)
4877 && htab->elf.splt != NULL)
4879 if (eh->plt_got.offset != (bfd_vma) -1)
4881 /* Use the GOT PLT. */
4882 resolved_plt = htab->plt_got;
4883 plt_offset = eh->plt_got.offset;
4885 else if (htab->plt_second != NULL)
4887 resolved_plt = htab->plt_second;
4888 plt_offset = eh->plt_second.offset;
4892 resolved_plt = htab->elf.splt;
4893 plt_offset = h->plt.offset;
4896 relocation = (resolved_plt->output_section->vma
4897 + resolved_plt->output_offset
4899 unresolved_reloc = FALSE;
4902 relocation -= htab->elf.sgotplt->output_section->vma
4903 + htab->elf.sgotplt->output_offset;
4906 case R_X86_64_PLT32:
4907 case R_X86_64_PLT32_BND:
4908 /* Relocation is to the entry for this symbol in the
4909 procedure linkage table. */
4911 /* Resolve a PLT32 reloc against a local symbol directly,
4912 without using the procedure linkage table. */
4916 if ((h->plt.offset == (bfd_vma) -1
4917 && eh->plt_got.offset == (bfd_vma) -1)
4918 || htab->elf.splt == NULL)
4920 /* We didn't make a PLT entry for this symbol. This
4921 happens when statically linking PIC code, or when
4922 using -Bsymbolic. */
4926 if (h->plt.offset != (bfd_vma) -1)
4928 if (htab->plt_second != NULL)
4930 resolved_plt = htab->plt_second;
4931 plt_offset = eh->plt_second.offset;
4935 resolved_plt = htab->elf.splt;
4936 plt_offset = h->plt.offset;
4941 /* Use the GOT PLT. */
4942 resolved_plt = htab->plt_got;
4943 plt_offset = eh->plt_got.offset;
4946 relocation = (resolved_plt->output_section->vma
4947 + resolved_plt->output_offset
4949 unresolved_reloc = FALSE;
4952 case R_X86_64_SIZE32:
4953 case R_X86_64_SIZE64:
4954 /* Set to symbol size. */
4955 relocation = st_size;
4961 case R_X86_64_PC32_BND:
4962 /* Don't complain about -fPIC if the symbol is undefined when
4963 building executable unless it is unresolved weak symbol. */
4964 if ((input_section->flags & SEC_ALLOC) != 0
4965 && (input_section->flags & SEC_READONLY) != 0
4967 && ((bfd_link_executable (info)
4968 && h->root.type == bfd_link_hash_undefweak
4969 && !resolved_to_zero)
4970 || (bfd_link_pic (info)
4971 && !(bfd_link_pie (info)
4972 && h->root.type == bfd_link_hash_undefined))))
4974 bfd_boolean fail = FALSE;
4976 = ((r_type == R_X86_64_PC32
4977 || r_type == R_X86_64_PC32_BND)
4978 && is_32bit_relative_branch (contents, rel->r_offset));
4980 if (SYMBOL_REFERENCES_LOCAL (info, h))
4982 /* Symbol is referenced locally. Make sure it is
4983 defined locally or for a branch. */
4984 fail = (!(h->def_regular || ELF_COMMON_DEF_P (h))
4987 else if (!(bfd_link_pie (info)
4988 && (h->needs_copy || eh->needs_copy)))
4990 /* Symbol doesn't need copy reloc and isn't referenced
4991 locally. We only allow branch to symbol with
4992 non-default visibility. */
4994 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
4998 return elf_x86_64_need_pic (input_bfd, input_section,
4999 h, NULL, NULL, howto);
5008 /* FIXME: The ABI says the linker should make sure the value is
5009 the same when it's zeroextended to 64 bit. */
5012 if ((input_section->flags & SEC_ALLOC) == 0)
5015 /* Don't copy a pc-relative relocation into the output file
5016 if the symbol needs copy reloc or the symbol is undefined
5017 when building executable. Copy dynamic function pointer
5018 relocations. Don't generate dynamic relocations against
5019 resolved undefined weak symbols in PIE. */
5020 if ((bfd_link_pic (info)
5021 && !(bfd_link_pie (info)
5025 || h->root.type == bfd_link_hash_undefined)
5026 && (IS_X86_64_PCREL_TYPE (r_type)
5027 || r_type == R_X86_64_SIZE32
5028 || r_type == R_X86_64_SIZE64))
5030 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5031 && !resolved_to_zero)
5032 || h->root.type != bfd_link_hash_undefweak))
5033 && ((! IS_X86_64_PCREL_TYPE (r_type)
5034 && r_type != R_X86_64_SIZE32
5035 && r_type != R_X86_64_SIZE64)
5036 || ! SYMBOL_CALLS_LOCAL (info, h)))
5037 || (ELIMINATE_COPY_RELOCS
5038 && !bfd_link_pic (info)
5042 || eh->func_pointer_refcount > 0
5043 || (h->root.type == bfd_link_hash_undefweak
5044 && !resolved_to_zero))
5045 && ((h->def_dynamic && !h->def_regular)
5046 /* Undefined weak symbol is bound locally when
5048 || h->root.type == bfd_link_hash_undefined)))
5050 Elf_Internal_Rela outrel;
5051 bfd_boolean skip, relocate;
5054 /* When generating a shared object, these relocations
5055 are copied into the output file to be resolved at run
5061 _bfd_elf_section_offset (output_bfd, info, input_section,
5063 if (outrel.r_offset == (bfd_vma) -1)
5065 else if (outrel.r_offset == (bfd_vma) -2)
5066 skip = TRUE, relocate = TRUE;
5068 outrel.r_offset += (input_section->output_section->vma
5069 + input_section->output_offset);
5072 memset (&outrel, 0, sizeof outrel);
5074 /* h->dynindx may be -1 if this symbol was marked to
5078 && (IS_X86_64_PCREL_TYPE (r_type)
5079 || !(bfd_link_executable (info)
5080 || SYMBOLIC_BIND (info, h))
5081 || ! h->def_regular))
5083 outrel.r_info = htab->r_info (h->dynindx, r_type);
5084 outrel.r_addend = rel->r_addend;
5088 /* This symbol is local, or marked to become local.
5089 When relocation overflow check is disabled, we
5090 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
5091 if (r_type == htab->pointer_r_type
5092 || (r_type == R_X86_64_32
5093 && info->no_reloc_overflow_check))
5096 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
5097 outrel.r_addend = relocation + rel->r_addend;
5099 else if (r_type == R_X86_64_64
5100 && !ABI_64_P (output_bfd))
5103 outrel.r_info = htab->r_info (0,
5104 R_X86_64_RELATIVE64);
5105 outrel.r_addend = relocation + rel->r_addend;
5106 /* Check addend overflow. */
5107 if ((outrel.r_addend & 0x80000000)
5108 != (rel->r_addend & 0x80000000))
5111 int addend = rel->r_addend;
5112 if (h && h->root.root.string)
5113 name = h->root.root.string;
5115 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
5119 /* xgettext:c-format */
5120 (_("%B: addend -0x%x in relocation %s against "
5121 "symbol `%s' at 0x%lx in section `%A' is "
5123 input_bfd, addend, howto->name, name,
5124 (unsigned long) rel->r_offset, input_section);
5127 /* xgettext:c-format */
5128 (_("%B: addend 0x%x in relocation %s against "
5129 "symbol `%s' at 0x%lx in section `%A' is "
5131 input_bfd, addend, howto->name, name,
5132 (unsigned long) rel->r_offset, input_section);
5133 bfd_set_error (bfd_error_bad_value);
5141 if (bfd_is_abs_section (sec))
5143 else if (sec == NULL || sec->owner == NULL)
5145 bfd_set_error (bfd_error_bad_value);
5152 /* We are turning this relocation into one
5153 against a section symbol. It would be
5154 proper to subtract the symbol's value,
5155 osec->vma, from the emitted reloc addend,
5156 but ld.so expects buggy relocs. */
5157 osec = sec->output_section;
5158 sindx = elf_section_data (osec)->dynindx;
5161 asection *oi = htab->elf.text_index_section;
5162 sindx = elf_section_data (oi)->dynindx;
5164 BFD_ASSERT (sindx != 0);
5167 outrel.r_info = htab->r_info (sindx, r_type);
5168 outrel.r_addend = relocation + rel->r_addend;
5172 sreloc = elf_section_data (input_section)->sreloc;
5174 if (sreloc == NULL || sreloc->contents == NULL)
5176 r = bfd_reloc_notsupported;
5177 goto check_relocation_error;
5180 elf_append_rela (output_bfd, sreloc, &outrel);
5182 /* If this reloc is against an external symbol, we do
5183 not want to fiddle with the addend. Otherwise, we
5184 need to include the symbol value so that it becomes
5185 an addend for the dynamic reloc. */
5192 case R_X86_64_TLSGD:
5193 case R_X86_64_GOTPC32_TLSDESC:
5194 case R_X86_64_TLSDESC_CALL:
5195 case R_X86_64_GOTTPOFF:
5196 tls_type = GOT_UNKNOWN;
5197 if (h == NULL && local_got_offsets)
5198 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
5200 tls_type = elf_x86_64_hash_entry (h)->tls_type;
5202 if (! elf_x86_64_tls_transition (info, input_bfd,
5203 input_section, contents,
5204 symtab_hdr, sym_hashes,
5205 &r_type, tls_type, rel,
5206 relend, h, r_symndx, TRUE))
5209 if (r_type == R_X86_64_TPOFF32)
5211 bfd_vma roff = rel->r_offset;
5213 BFD_ASSERT (! unresolved_reloc);
5215 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5217 /* GD->LE transition. For 64bit, change
5218 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5219 .word 0x6666; rex64; call __tls_get_addr@PLT
5221 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5223 call *__tls_get_addr@GOTPCREL(%rip)
5224 which may be converted to
5225 addr32 call __tls_get_addr
5228 leaq foo@tpoff(%rax), %rax
5230 leaq foo@tlsgd(%rip), %rdi
5231 .word 0x6666; rex64; call __tls_get_addr@PLT
5233 leaq foo@tlsgd(%rip), %rdi
5235 call *__tls_get_addr@GOTPCREL(%rip)
5236 which may be converted to
5237 addr32 call __tls_get_addr
5240 leaq foo@tpoff(%rax), %rax
5241 For largepic, change:
5242 leaq foo@tlsgd(%rip), %rdi
5243 movabsq $__tls_get_addr@pltoff, %rax
5248 leaq foo@tpoff(%rax), %rax
5249 nopw 0x0(%rax,%rax,1) */
5251 if (ABI_64_P (output_bfd))
5253 if (contents[roff + 5] == 0xb8)
5255 memcpy (contents + roff - 3,
5256 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
5257 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5261 memcpy (contents + roff - 4,
5262 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5266 memcpy (contents + roff - 3,
5267 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5269 bfd_put_32 (output_bfd,
5270 elf_x86_64_tpoff (info, relocation),
5271 contents + roff + 8 + largepic);
5272 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
5273 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
5278 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5280 /* GDesc -> LE transition.
5281 It's originally something like:
5282 leaq x@tlsdesc(%rip), %rax
5285 movl $x@tpoff, %rax. */
5287 unsigned int val, type;
5289 type = bfd_get_8 (input_bfd, contents + roff - 3);
5290 val = bfd_get_8 (input_bfd, contents + roff - 1);
5291 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
5292 contents + roff - 3);
5293 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
5294 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
5295 contents + roff - 1);
5296 bfd_put_32 (output_bfd,
5297 elf_x86_64_tpoff (info, relocation),
5301 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5303 /* GDesc -> LE transition.
5308 bfd_put_8 (output_bfd, 0x66, contents + roff);
5309 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5312 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
5314 /* IE->LE transition:
5315 For 64bit, originally it can be one of:
5316 movq foo@gottpoff(%rip), %reg
5317 addq foo@gottpoff(%rip), %reg
5320 leaq foo(%reg), %reg
5322 For 32bit, originally it can be one of:
5323 movq foo@gottpoff(%rip), %reg
5324 addl foo@gottpoff(%rip), %reg
5327 leal foo(%reg), %reg
5330 unsigned int val, type, reg;
5333 val = bfd_get_8 (input_bfd, contents + roff - 3);
5336 type = bfd_get_8 (input_bfd, contents + roff - 2);
5337 reg = bfd_get_8 (input_bfd, contents + roff - 1);
5343 bfd_put_8 (output_bfd, 0x49,
5344 contents + roff - 3);
5345 else if (!ABI_64_P (output_bfd) && val == 0x44)
5346 bfd_put_8 (output_bfd, 0x41,
5347 contents + roff - 3);
5348 bfd_put_8 (output_bfd, 0xc7,
5349 contents + roff - 2);
5350 bfd_put_8 (output_bfd, 0xc0 | reg,
5351 contents + roff - 1);
5355 /* addq/addl -> addq/addl - addressing with %rsp/%r12
5358 bfd_put_8 (output_bfd, 0x49,
5359 contents + roff - 3);
5360 else if (!ABI_64_P (output_bfd) && val == 0x44)
5361 bfd_put_8 (output_bfd, 0x41,
5362 contents + roff - 3);
5363 bfd_put_8 (output_bfd, 0x81,
5364 contents + roff - 2);
5365 bfd_put_8 (output_bfd, 0xc0 | reg,
5366 contents + roff - 1);
5370 /* addq/addl -> leaq/leal */
5372 bfd_put_8 (output_bfd, 0x4d,
5373 contents + roff - 3);
5374 else if (!ABI_64_P (output_bfd) && val == 0x44)
5375 bfd_put_8 (output_bfd, 0x45,
5376 contents + roff - 3);
5377 bfd_put_8 (output_bfd, 0x8d,
5378 contents + roff - 2);
5379 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
5380 contents + roff - 1);
5382 bfd_put_32 (output_bfd,
5383 elf_x86_64_tpoff (info, relocation),
5391 if (htab->elf.sgot == NULL)
5396 off = h->got.offset;
5397 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
5401 if (local_got_offsets == NULL)
5404 off = local_got_offsets[r_symndx];
5405 offplt = local_tlsdesc_gotents[r_symndx];
5412 Elf_Internal_Rela outrel;
5416 if (htab->elf.srelgot == NULL)
5419 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5421 if (GOT_TLS_GDESC_P (tls_type))
5423 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
5424 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
5425 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
5426 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
5427 + htab->elf.sgotplt->output_offset
5429 + htab->sgotplt_jump_table_size);
5430 sreloc = htab->elf.srelplt;
5432 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5434 outrel.r_addend = 0;
5435 elf_append_rela (output_bfd, sreloc, &outrel);
5438 sreloc = htab->elf.srelgot;
5440 outrel.r_offset = (htab->elf.sgot->output_section->vma
5441 + htab->elf.sgot->output_offset + off);
5443 if (GOT_TLS_GD_P (tls_type))
5444 dr_type = R_X86_64_DTPMOD64;
5445 else if (GOT_TLS_GDESC_P (tls_type))
5448 dr_type = R_X86_64_TPOFF64;
5450 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
5451 outrel.r_addend = 0;
5452 if ((dr_type == R_X86_64_TPOFF64
5453 || dr_type == R_X86_64_TLSDESC) && indx == 0)
5454 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5455 outrel.r_info = htab->r_info (indx, dr_type);
5457 elf_append_rela (output_bfd, sreloc, &outrel);
5459 if (GOT_TLS_GD_P (tls_type))
5463 BFD_ASSERT (! unresolved_reloc);
5464 bfd_put_64 (output_bfd,
5465 relocation - elf_x86_64_dtpoff_base (info),
5466 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5470 bfd_put_64 (output_bfd, 0,
5471 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5472 outrel.r_info = htab->r_info (indx,
5474 outrel.r_offset += GOT_ENTRY_SIZE;
5475 elf_append_rela (output_bfd, sreloc,
5484 local_got_offsets[r_symndx] |= 1;
5487 if (off >= (bfd_vma) -2
5488 && ! GOT_TLS_GDESC_P (tls_type))
5490 if (r_type == ELF32_R_TYPE (rel->r_info))
5492 if (r_type == R_X86_64_GOTPC32_TLSDESC
5493 || r_type == R_X86_64_TLSDESC_CALL)
5494 relocation = htab->elf.sgotplt->output_section->vma
5495 + htab->elf.sgotplt->output_offset
5496 + offplt + htab->sgotplt_jump_table_size;
5498 relocation = htab->elf.sgot->output_section->vma
5499 + htab->elf.sgot->output_offset + off;
5500 unresolved_reloc = FALSE;
5504 bfd_vma roff = rel->r_offset;
5506 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5508 /* GD->IE transition. For 64bit, change
5509 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5510 .word 0x6666; rex64; call __tls_get_addr@PLT
5512 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5514 call *__tls_get_addr@GOTPCREL(%rip
5515 which may be converted to
5516 addr32 call __tls_get_addr
5519 addq foo@gottpoff(%rip), %rax
5521 leaq foo@tlsgd(%rip), %rdi
5522 .word 0x6666; rex64; call __tls_get_addr@PLT
5524 leaq foo@tlsgd(%rip), %rdi
5526 call *__tls_get_addr@GOTPCREL(%rip)
5527 which may be converted to
5528 addr32 call __tls_get_addr
5531 addq foo@gottpoff(%rip), %rax
5532 For largepic, change:
5533 leaq foo@tlsgd(%rip), %rdi
5534 movabsq $__tls_get_addr@pltoff, %rax
5539 addq foo@gottpoff(%rax), %rax
5540 nopw 0x0(%rax,%rax,1) */
5542 if (ABI_64_P (output_bfd))
5544 if (contents[roff + 5] == 0xb8)
5546 memcpy (contents + roff - 3,
5547 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
5548 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5552 memcpy (contents + roff - 4,
5553 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5557 memcpy (contents + roff - 3,
5558 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5561 relocation = (htab->elf.sgot->output_section->vma
5562 + htab->elf.sgot->output_offset + off
5565 - input_section->output_section->vma
5566 - input_section->output_offset
5568 bfd_put_32 (output_bfd, relocation,
5569 contents + roff + 8 + largepic);
5570 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
5575 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5577 /* GDesc -> IE transition.
5578 It's originally something like:
5579 leaq x@tlsdesc(%rip), %rax
5582 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
5584 /* Now modify the instruction as appropriate. To
5585 turn a leaq into a movq in the form we use it, it
5586 suffices to change the second byte from 0x8d to
5588 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5590 bfd_put_32 (output_bfd,
5591 htab->elf.sgot->output_section->vma
5592 + htab->elf.sgot->output_offset + off
5594 - input_section->output_section->vma
5595 - input_section->output_offset
5600 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5602 /* GDesc -> IE transition.
5609 bfd_put_8 (output_bfd, 0x66, contents + roff);
5610 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5618 case R_X86_64_TLSLD:
5619 if (! elf_x86_64_tls_transition (info, input_bfd,
5620 input_section, contents,
5621 symtab_hdr, sym_hashes,
5622 &r_type, GOT_UNKNOWN, rel,
5623 relend, h, r_symndx, TRUE))
5626 if (r_type != R_X86_64_TLSLD)
5628 /* LD->LE transition:
5629 leaq foo@tlsld(%rip), %rdi
5630 call __tls_get_addr@PLT
5631 For 64bit, we change it into:
5632 .word 0x6666; .byte 0x66; movq %fs:0, %rax
5633 For 32bit, we change it into:
5634 nopl 0x0(%rax); movl %fs:0, %eax
5636 leaq foo@tlsld(%rip), %rdi;
5637 call *__tls_get_addr@GOTPCREL(%rip)
5638 which may be converted to
5639 addr32 call __tls_get_addr
5640 For 64bit, we change it into:
5641 .word 0x6666; .word 0x6666; movq %fs:0, %rax
5642 For 32bit, we change it into:
5643 nopw 0x0(%rax); movl %fs:0, %eax
5644 For largepic, change:
5645 leaq foo@tlsgd(%rip), %rdi
5646 movabsq $__tls_get_addr@pltoff, %rax
5650 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
5653 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5654 if (ABI_64_P (output_bfd))
5656 if (contents[rel->r_offset + 5] == 0xb8)
5657 memcpy (contents + rel->r_offset - 3,
5658 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5659 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5660 else if (contents[rel->r_offset + 4] == 0xff
5661 || contents[rel->r_offset + 4] == 0x67)
5662 memcpy (contents + rel->r_offset - 3,
5663 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
5666 memcpy (contents + rel->r_offset - 3,
5667 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5671 if (contents[rel->r_offset + 4] == 0xff)
5672 memcpy (contents + rel->r_offset - 3,
5673 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
5676 memcpy (contents + rel->r_offset - 3,
5677 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5679 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
5680 and R_X86_64_PLTOFF64. */
5686 if (htab->elf.sgot == NULL)
5689 off = htab->tls_ld_got.offset;
5694 Elf_Internal_Rela outrel;
5696 if (htab->elf.srelgot == NULL)
5699 outrel.r_offset = (htab->elf.sgot->output_section->vma
5700 + htab->elf.sgot->output_offset + off);
5702 bfd_put_64 (output_bfd, 0,
5703 htab->elf.sgot->contents + off);
5704 bfd_put_64 (output_bfd, 0,
5705 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5706 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
5707 outrel.r_addend = 0;
5708 elf_append_rela (output_bfd, htab->elf.srelgot,
5710 htab->tls_ld_got.offset |= 1;
5712 relocation = htab->elf.sgot->output_section->vma
5713 + htab->elf.sgot->output_offset + off;
5714 unresolved_reloc = FALSE;
5717 case R_X86_64_DTPOFF32:
5718 if (!bfd_link_executable (info)
5719 || (input_section->flags & SEC_CODE) == 0)
5720 relocation -= elf_x86_64_dtpoff_base (info);
5722 relocation = elf_x86_64_tpoff (info, relocation);
5725 case R_X86_64_TPOFF32:
5726 case R_X86_64_TPOFF64:
5727 BFD_ASSERT (bfd_link_executable (info));
5728 relocation = elf_x86_64_tpoff (info, relocation);
5731 case R_X86_64_DTPOFF64:
5732 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
5733 relocation -= elf_x86_64_dtpoff_base (info);
5740 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5741 because such sections are not SEC_ALLOC and thus ld.so will
5742 not process them. */
5743 if (unresolved_reloc
5744 && !((input_section->flags & SEC_DEBUGGING) != 0
5746 && _bfd_elf_section_offset (output_bfd, info, input_section,
5747 rel->r_offset) != (bfd_vma) -1)
5750 /* xgettext:c-format */
5751 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5754 (long) rel->r_offset,
5756 h->root.root.string);
5761 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5762 contents, rel->r_offset,
5763 relocation, rel->r_addend);
5765 check_relocation_error:
5766 if (r != bfd_reloc_ok)
5771 name = h->root.root.string;
5774 name = bfd_elf_string_from_elf_section (input_bfd,
5775 symtab_hdr->sh_link,
5780 name = bfd_section_name (input_bfd, sec);
5783 if (r == bfd_reloc_overflow)
5784 (*info->callbacks->reloc_overflow)
5785 (info, (h ? &h->root : NULL), name, howto->name,
5786 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5790 /* xgettext:c-format */
5791 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5792 input_bfd, input_section,
5793 (long) rel->r_offset, name, (int) r);
5804 Elf_Internal_Shdr *rel_hdr;
5805 size_t deleted = rel - wrel;
5807 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5808 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5809 if (rel_hdr->sh_size == 0)
5811 /* It is too late to remove an empty reloc section. Leave
5813 ??? What is wrong with an empty section??? */
5814 rel_hdr->sh_size = rel_hdr->sh_entsize;
5817 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5818 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5819 input_section->reloc_count -= deleted;
5825 /* Finish up dynamic symbol handling. We set the contents of various
5826 dynamic sections here. */
5829 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
5830 struct bfd_link_info *info,
5831 struct elf_link_hash_entry *h,
5832 Elf_Internal_Sym *sym)
5834 struct elf_x86_64_link_hash_table *htab;
5835 bfd_boolean use_plt_second;
5836 struct elf_x86_64_link_hash_entry *eh;
5837 bfd_boolean local_undefweak;
5839 htab = elf_x86_64_hash_table (info);
5843 /* Use the second PLT section only if there is .plt section. */
5844 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
5846 eh = (struct elf_x86_64_link_hash_entry *) h;
5847 if (eh->no_finish_dynamic_symbol)
5850 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5851 resolved undefined weak symbols in executable so that their
5852 references have value 0 at run-time. */
5853 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
5857 if (h->plt.offset != (bfd_vma) -1)
5860 bfd_vma got_offset, plt_offset;
5861 Elf_Internal_Rela rela;
5863 asection *plt, *gotplt, *relplt, *resolved_plt;
5864 const struct elf_backend_data *bed;
5865 bfd_vma plt_got_pcrel_offset;
5867 /* When building a static executable, use .iplt, .igot.plt and
5868 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5869 if (htab->elf.splt != NULL)
5871 plt = htab->elf.splt;
5872 gotplt = htab->elf.sgotplt;
5873 relplt = htab->elf.srelplt;
5877 plt = htab->elf.iplt;
5878 gotplt = htab->elf.igotplt;
5879 relplt = htab->elf.irelplt;
5882 /* This symbol has an entry in the procedure linkage table. Set
5884 if ((h->dynindx == -1
5886 && !((h->forced_local || bfd_link_executable (info))
5888 && h->type == STT_GNU_IFUNC))
5894 /* Get the index in the procedure linkage table which
5895 corresponds to this symbol. This is the index of this symbol
5896 in all the symbols for which we are making plt entries. The
5897 first entry in the procedure linkage table is reserved.
5899 Get the offset into the .got table of the entry that
5900 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5901 bytes. The first three are reserved for the dynamic linker.
5903 For static executables, we don't reserve anything. */
5905 if (plt == htab->elf.splt)
5907 got_offset = (h->plt.offset / htab->plt.plt_entry_size
5908 - htab->plt.has_plt0);
5909 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
5913 got_offset = h->plt.offset / htab->plt.plt_entry_size;
5914 got_offset = got_offset * GOT_ENTRY_SIZE;
5917 /* Fill in the entry in the procedure linkage table. */
5918 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
5919 htab->plt.plt_entry_size);
5922 memcpy (htab->plt_second->contents + eh->plt_second.offset,
5923 htab->non_lazy_plt->plt_entry,
5924 htab->non_lazy_plt->plt_entry_size);
5926 resolved_plt = htab->plt_second;
5927 plt_offset = eh->plt_second.offset;
5932 plt_offset = h->plt.offset;
5935 /* Insert the relocation positions of the plt section. */
5937 /* Put offset the PC-relative instruction referring to the GOT entry,
5938 subtracting the size of that instruction. */
5939 plt_got_pcrel_offset = (gotplt->output_section->vma
5940 + gotplt->output_offset
5942 - resolved_plt->output_section->vma
5943 - resolved_plt->output_offset
5945 - htab->plt.plt_got_insn_size);
5947 /* Check PC-relative offset overflow in PLT entry. */
5948 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
5949 /* xgettext:c-format */
5950 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5951 output_bfd, h->root.root.string);
5953 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
5954 (resolved_plt->contents + plt_offset
5955 + htab->plt.plt_got_offset));
5957 /* Fill in the entry in the global offset table, initially this
5958 points to the second part of the PLT entry. Leave the entry
5959 as zero for undefined weak symbol in PIE. No PLT relocation
5960 against undefined weak symbol in PIE. */
5961 if (!local_undefweak)
5963 if (htab->plt.has_plt0)
5964 bfd_put_64 (output_bfd, (plt->output_section->vma
5965 + plt->output_offset
5967 + htab->lazy_plt->plt_lazy_offset),
5968 gotplt->contents + got_offset);
5970 /* Fill in the entry in the .rela.plt section. */
5971 rela.r_offset = (gotplt->output_section->vma
5972 + gotplt->output_offset
5974 if (h->dynindx == -1
5975 || ((bfd_link_executable (info)
5976 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5978 && h->type == STT_GNU_IFUNC))
5980 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5981 h->root.root.string,
5982 h->root.u.def.section->owner);
5984 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5985 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5986 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
5987 rela.r_addend = (h->root.u.def.value
5988 + h->root.u.def.section->output_section->vma
5989 + h->root.u.def.section->output_offset);
5990 /* R_X86_64_IRELATIVE comes last. */
5991 plt_index = htab->next_irelative_index--;
5995 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
5997 plt_index = htab->next_jump_slot_index++;
6000 /* Don't fill the second and third slots in PLT entry for
6001 static executables nor without PLT0. */
6002 if (plt == htab->elf.splt && htab->plt.has_plt0)
6005 = h->plt.offset + htab->lazy_plt->plt_plt_insn_end;
6007 /* Put relocation index. */
6008 bfd_put_32 (output_bfd, plt_index,
6009 (plt->contents + h->plt.offset
6010 + htab->lazy_plt->plt_reloc_offset));
6012 /* Put offset for jmp .PLT0 and check for overflow. We don't
6013 check relocation index for overflow since branch displacement
6014 will overflow first. */
6015 if (plt0_offset > 0x80000000)
6016 /* xgettext:c-format */
6017 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
6018 output_bfd, h->root.root.string);
6019 bfd_put_32 (output_bfd, - plt0_offset,
6020 (plt->contents + h->plt.offset
6021 + htab->lazy_plt->plt_plt_offset));
6024 bed = get_elf_backend_data (output_bfd);
6025 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
6026 bed->s->swap_reloca_out (output_bfd, &rela, loc);
6029 else if (eh->plt_got.offset != (bfd_vma) -1)
6031 bfd_vma got_offset, plt_offset;
6032 asection *plt, *got;
6033 bfd_boolean got_after_plt;
6034 int32_t got_pcrel_offset;
6036 /* Set the entry in the GOT procedure linkage table. */
6037 plt = htab->plt_got;
6038 got = htab->elf.sgot;
6039 got_offset = h->got.offset;
6041 if (got_offset == (bfd_vma) -1
6042 || (h->type == STT_GNU_IFUNC && h->def_regular)
6047 /* Use the non-lazy PLT entry template for the GOT PLT since they
6048 are the identical. */
6049 /* Fill in the entry in the GOT procedure linkage table. */
6050 plt_offset = eh->plt_got.offset;
6051 memcpy (plt->contents + plt_offset,
6052 htab->non_lazy_plt->plt_entry,
6053 htab->non_lazy_plt->plt_entry_size);
6055 /* Put offset the PC-relative instruction referring to the GOT
6056 entry, subtracting the size of that instruction. */
6057 got_pcrel_offset = (got->output_section->vma
6058 + got->output_offset
6060 - plt->output_section->vma
6061 - plt->output_offset
6063 - htab->non_lazy_plt->plt_got_insn_size);
6065 /* Check PC-relative offset overflow in GOT PLT entry. */
6066 got_after_plt = got->output_section->vma > plt->output_section->vma;
6067 if ((got_after_plt && got_pcrel_offset < 0)
6068 || (!got_after_plt && got_pcrel_offset > 0))
6069 /* xgettext:c-format */
6070 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
6071 output_bfd, h->root.root.string);
6073 bfd_put_32 (output_bfd, got_pcrel_offset,
6074 (plt->contents + plt_offset
6075 + htab->non_lazy_plt->plt_got_offset));
6078 if (!local_undefweak
6080 && (h->plt.offset != (bfd_vma) -1
6081 || eh->plt_got.offset != (bfd_vma) -1))
6083 /* Mark the symbol as undefined, rather than as defined in
6084 the .plt section. Leave the value if there were any
6085 relocations where pointer equality matters (this is a clue
6086 for the dynamic linker, to make function pointer
6087 comparisons work between an application and shared
6088 library), otherwise set it to zero. If a function is only
6089 called from a binary, there is no need to slow down
6090 shared libraries because of that. */
6091 sym->st_shndx = SHN_UNDEF;
6092 if (!h->pointer_equality_needed)
6096 /* Don't generate dynamic GOT relocation against undefined weak
6097 symbol in executable. */
6098 if (h->got.offset != (bfd_vma) -1
6099 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
6100 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE
6101 && !local_undefweak)
6103 Elf_Internal_Rela rela;
6104 asection *relgot = htab->elf.srelgot;
6106 /* This symbol has an entry in the global offset table. Set it
6108 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
6111 rela.r_offset = (htab->elf.sgot->output_section->vma
6112 + htab->elf.sgot->output_offset
6113 + (h->got.offset &~ (bfd_vma) 1));
6115 /* If this is a static link, or it is a -Bsymbolic link and the
6116 symbol is defined locally or was forced to be local because
6117 of a version file, we just want to emit a RELATIVE reloc.
6118 The entry in the global offset table will already have been
6119 initialized in the relocate_section function. */
6121 && h->type == STT_GNU_IFUNC)
6123 if (h->plt.offset == (bfd_vma) -1)
6125 /* STT_GNU_IFUNC is referenced without PLT. */
6126 if (htab->elf.splt == NULL)
6128 /* use .rel[a].iplt section to store .got relocations
6129 in static executable. */
6130 relgot = htab->elf.irelplt;
6132 if (SYMBOL_REFERENCES_LOCAL (info, h))
6134 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
6136 h->root.root.string,
6137 h->root.u.def.section->owner);
6139 rela.r_info = htab->r_info (0,
6140 R_X86_64_IRELATIVE);
6141 rela.r_addend = (h->root.u.def.value
6142 + h->root.u.def.section->output_section->vma
6143 + h->root.u.def.section->output_offset);
6148 else if (bfd_link_pic (info))
6150 /* Generate R_X86_64_GLOB_DAT. */
6158 if (!h->pointer_equality_needed)
6161 /* For non-shared object, we can't use .got.plt, which
6162 contains the real function addres if we need pointer
6163 equality. We load the GOT entry with the PLT entry. */
6164 if (htab->plt_second != NULL)
6166 plt = htab->plt_second;
6167 plt_offset = eh->plt_second.offset;
6171 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
6172 plt_offset = h->plt.offset;
6174 bfd_put_64 (output_bfd, (plt->output_section->vma
6175 + plt->output_offset
6177 htab->elf.sgot->contents + h->got.offset);
6181 else if (bfd_link_pic (info)
6182 && SYMBOL_REFERENCES_LOCAL (info, h))
6184 if (!h->def_regular)
6186 BFD_ASSERT((h->got.offset & 1) != 0);
6187 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
6188 rela.r_addend = (h->root.u.def.value
6189 + h->root.u.def.section->output_section->vma
6190 + h->root.u.def.section->output_offset);
6194 BFD_ASSERT((h->got.offset & 1) == 0);
6196 bfd_put_64 (output_bfd, (bfd_vma) 0,
6197 htab->elf.sgot->contents + h->got.offset);
6198 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
6202 elf_append_rela (output_bfd, relgot, &rela);
6207 Elf_Internal_Rela rela;
6210 /* This symbol needs a copy reloc. Set it up. */
6212 if (h->dynindx == -1
6213 || (h->root.type != bfd_link_hash_defined
6214 && h->root.type != bfd_link_hash_defweak)
6215 || htab->elf.srelbss == NULL
6216 || htab->elf.sreldynrelro == NULL)
6219 rela.r_offset = (h->root.u.def.value
6220 + h->root.u.def.section->output_section->vma
6221 + h->root.u.def.section->output_offset);
6222 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
6224 if (h->root.u.def.section == htab->elf.sdynrelro)
6225 s = htab->elf.sreldynrelro;
6227 s = htab->elf.srelbss;
6228 elf_append_rela (output_bfd, s, &rela);
6234 /* Finish up local dynamic symbol handling. We set the contents of
6235 various dynamic sections here. */
6238 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
6240 struct elf_link_hash_entry *h
6241 = (struct elf_link_hash_entry *) *slot;
6242 struct bfd_link_info *info
6243 = (struct bfd_link_info *) inf;
6245 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
6249 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
6250 here since undefined weak symbol may not be dynamic and may not be
6251 called for elf_x86_64_finish_dynamic_symbol. */
6254 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
6257 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
6258 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6260 if (h->root.type != bfd_link_hash_undefweak
6261 || h->dynindx != -1)
6264 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
6268 /* Used to decide how to sort relocs in an optimal manner for the
6269 dynamic linker, before writing them out. */
6271 static enum elf_reloc_type_class
6272 elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
6273 const asection *rel_sec ATTRIBUTE_UNUSED,
6274 const Elf_Internal_Rela *rela)
6276 bfd *abfd = info->output_bfd;
6277 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6278 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
6280 if (htab->elf.dynsym != NULL
6281 && htab->elf.dynsym->contents != NULL)
6283 /* Check relocation against STT_GNU_IFUNC symbol if there are
6285 unsigned long r_symndx = htab->r_sym (rela->r_info);
6286 if (r_symndx != STN_UNDEF)
6288 Elf_Internal_Sym sym;
6289 if (!bed->s->swap_symbol_in (abfd,
6290 (htab->elf.dynsym->contents
6291 + r_symndx * bed->s->sizeof_sym),
6295 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
6296 return reloc_class_ifunc;
6300 switch ((int) ELF32_R_TYPE (rela->r_info))
6302 case R_X86_64_IRELATIVE:
6303 return reloc_class_ifunc;
6304 case R_X86_64_RELATIVE:
6305 case R_X86_64_RELATIVE64:
6306 return reloc_class_relative;
6307 case R_X86_64_JUMP_SLOT:
6308 return reloc_class_plt;
6310 return reloc_class_copy;
6312 return reloc_class_normal;
6316 /* Finish up the dynamic sections. */
6319 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
6320 struct bfd_link_info *info)
6322 struct elf_x86_64_link_hash_table *htab;
6326 htab = elf_x86_64_hash_table (info);
6330 dynobj = htab->elf.dynobj;
6331 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
6333 if (htab->elf.dynamic_sections_created)
6335 bfd_byte *dyncon, *dynconend;
6336 const struct elf_backend_data *bed;
6337 bfd_size_type sizeof_dyn;
6339 if (sdyn == NULL || htab->elf.sgot == NULL)
6342 bed = get_elf_backend_data (dynobj);
6343 sizeof_dyn = bed->s->sizeof_dyn;
6344 dyncon = sdyn->contents;
6345 dynconend = sdyn->contents + sdyn->size;
6346 for (; dyncon < dynconend; dyncon += sizeof_dyn)
6348 Elf_Internal_Dyn dyn;
6351 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
6359 s = htab->elf.sgotplt;
6360 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6364 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
6368 s = htab->elf.srelplt->output_section;
6369 dyn.d_un.d_val = s->size;
6372 case DT_TLSDESC_PLT:
6374 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6375 + htab->tlsdesc_plt;
6378 case DT_TLSDESC_GOT:
6380 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6381 + htab->tlsdesc_got;
6385 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
6388 if (htab->elf.splt && htab->elf.splt->size > 0)
6390 elf_section_data (htab->elf.splt->output_section)
6391 ->this_hdr.sh_entsize = htab->plt.plt_entry_size;
6393 if (htab->plt.has_plt0)
6395 /* Fill in the special first entry in the procedure linkage
6397 memcpy (htab->elf.splt->contents,
6398 htab->lazy_plt->plt0_entry,
6399 htab->lazy_plt->plt_entry_size);
6400 /* Add offset for pushq GOT+8(%rip), since the instruction
6401 uses 6 bytes subtract this value. */
6402 bfd_put_32 (output_bfd,
6403 (htab->elf.sgotplt->output_section->vma
6404 + htab->elf.sgotplt->output_offset
6406 - htab->elf.splt->output_section->vma
6407 - htab->elf.splt->output_offset
6409 (htab->elf.splt->contents
6410 + htab->lazy_plt->plt0_got1_offset));
6411 /* Add offset for the PC-relative instruction accessing
6412 GOT+16, subtracting the offset to the end of that
6414 bfd_put_32 (output_bfd,
6415 (htab->elf.sgotplt->output_section->vma
6416 + htab->elf.sgotplt->output_offset
6418 - htab->elf.splt->output_section->vma
6419 - htab->elf.splt->output_offset
6420 - htab->lazy_plt->plt0_got2_insn_end),
6421 (htab->elf.splt->contents
6422 + htab->lazy_plt->plt0_got2_offset));
6424 if (htab->tlsdesc_plt)
6426 bfd_put_64 (output_bfd, (bfd_vma) 0,
6427 htab->elf.sgot->contents + htab->tlsdesc_got);
6429 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
6430 htab->lazy_plt->plt0_entry,
6431 htab->lazy_plt->plt_entry_size);
6433 /* Add offset for pushq GOT+8(%rip), since the
6434 instruction uses 6 bytes subtract this value. */
6435 bfd_put_32 (output_bfd,
6436 (htab->elf.sgotplt->output_section->vma
6437 + htab->elf.sgotplt->output_offset
6439 - htab->elf.splt->output_section->vma
6440 - htab->elf.splt->output_offset
6443 (htab->elf.splt->contents
6445 + htab->lazy_plt->plt0_got1_offset));
6446 /* Add offset for the PC-relative instruction accessing
6447 GOT+TDG, where TDG stands for htab->tlsdesc_got,
6448 subtracting the offset to the end of that
6450 bfd_put_32 (output_bfd,
6451 (htab->elf.sgot->output_section->vma
6452 + htab->elf.sgot->output_offset
6454 - htab->elf.splt->output_section->vma
6455 - htab->elf.splt->output_offset
6457 - htab->lazy_plt->plt0_got2_insn_end),
6458 (htab->elf.splt->contents
6460 + htab->lazy_plt->plt0_got2_offset));
6466 if (htab->plt_got != NULL && htab->plt_got->size > 0)
6467 elf_section_data (htab->plt_got->output_section)
6468 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6470 if (htab->plt_second != NULL && htab->plt_second->size > 0)
6471 elf_section_data (htab->plt_second->output_section)
6472 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6474 /* GOT is always created in setup_gnu_properties. But it may not be
6476 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
6478 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
6481 (_("discarded output section: `%A'"), htab->elf.sgotplt);
6485 /* Set the first entry in the global offset table to the address of
6486 the dynamic section. */
6488 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
6490 bfd_put_64 (output_bfd,
6491 sdyn->output_section->vma + sdyn->output_offset,
6492 htab->elf.sgotplt->contents);
6493 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6494 bfd_put_64 (output_bfd, (bfd_vma) 0,
6495 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
6496 bfd_put_64 (output_bfd, (bfd_vma) 0,
6497 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
6499 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize
6503 /* Adjust .eh_frame for .plt section. */
6504 if (htab->plt_eh_frame != NULL
6505 && htab->plt_eh_frame->contents != NULL)
6507 if (htab->elf.splt != NULL
6508 && htab->elf.splt->size != 0
6509 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
6510 && htab->elf.splt->output_section != NULL
6511 && htab->plt_eh_frame->output_section != NULL)
6513 bfd_vma plt_start = htab->elf.splt->output_section->vma;
6514 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
6515 + htab->plt_eh_frame->output_offset
6516 + PLT_FDE_START_OFFSET;
6517 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6518 htab->plt_eh_frame->contents
6519 + PLT_FDE_START_OFFSET);
6521 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
6523 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6525 htab->plt_eh_frame->contents))
6530 /* Adjust .eh_frame for .plt.got section. */
6531 if (htab->plt_got_eh_frame != NULL
6532 && htab->plt_got_eh_frame->contents != NULL)
6534 if (htab->plt_got != NULL
6535 && htab->plt_got->size != 0
6536 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
6537 && htab->plt_got->output_section != NULL
6538 && htab->plt_got_eh_frame->output_section != NULL)
6540 bfd_vma plt_start = htab->plt_got->output_section->vma;
6541 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
6542 + htab->plt_got_eh_frame->output_offset
6543 + PLT_FDE_START_OFFSET;
6544 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6545 htab->plt_got_eh_frame->contents
6546 + PLT_FDE_START_OFFSET);
6548 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
6550 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6551 htab->plt_got_eh_frame,
6552 htab->plt_got_eh_frame->contents))
6557 /* Adjust .eh_frame for the second PLT section. */
6558 if (htab->plt_second_eh_frame != NULL
6559 && htab->plt_second_eh_frame->contents != NULL)
6561 if (htab->plt_second != NULL
6562 && htab->plt_second->size != 0
6563 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
6564 && htab->plt_second->output_section != NULL
6565 && htab->plt_second_eh_frame->output_section != NULL)
6567 bfd_vma plt_start = htab->plt_second->output_section->vma;
6568 bfd_vma eh_frame_start
6569 = (htab->plt_second_eh_frame->output_section->vma
6570 + htab->plt_second_eh_frame->output_offset
6571 + PLT_FDE_START_OFFSET);
6572 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6573 htab->plt_second_eh_frame->contents
6574 + PLT_FDE_START_OFFSET);
6576 if (htab->plt_second_eh_frame->sec_info_type
6577 == SEC_INFO_TYPE_EH_FRAME)
6579 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6580 htab->plt_second_eh_frame,
6581 htab->plt_second_eh_frame->contents))
6586 if (htab->elf.sgot && htab->elf.sgot->size > 0)
6587 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
6590 /* Fill PLT entries for undefined weak symbols in PIE. */
6591 if (bfd_link_pie (info))
6592 bfd_hash_traverse (&info->hash->table,
6593 elf_x86_64_pie_finish_undefweak_symbol,
6599 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6600 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6601 It has to be done before elf_link_sort_relocs is called so that
6602 dynamic relocations are properly sorted. */
6605 elf_x86_64_output_arch_local_syms
6606 (bfd *output_bfd ATTRIBUTE_UNUSED,
6607 struct bfd_link_info *info,
6608 void *flaginfo ATTRIBUTE_UNUSED,
6609 int (*func) (void *, const char *,
6612 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
6614 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
6618 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6619 htab_traverse (htab->loc_hash_table,
6620 elf_x86_64_finish_local_dynamic_symbol,
6626 /* Sort relocs into address order. */
6629 compare_relocs (const void *ap, const void *bp)
6631 const arelent *a = * (const arelent **) ap;
6632 const arelent *b = * (const arelent **) bp;
6634 if (a->address > b->address)
6636 else if (a->address < b->address)
6642 enum elf_x86_64_plt_type
6646 plt_second = 1 << 1,
6650 struct elf_x86_64_plt
6655 enum elf_x86_64_plt_type type;
6656 unsigned int plt_got_offset;
6657 unsigned int plt_got_insn_size;
6658 unsigned int plt_entry_size;
6662 /* Forward declaration. */
6663 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt;
6665 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
6666 dynamic relocations. */
6669 elf_x86_64_get_synthetic_symtab (bfd *abfd,
6670 long symcount ATTRIBUTE_UNUSED,
6671 asymbol **syms ATTRIBUTE_UNUSED,
6676 long size, count, i, n;
6678 unsigned int plt_got_offset, plt_entry_size, plt_got_insn_size;
6680 bfd_byte *plt_contents;
6681 long dynrelcount, relsize;
6682 arelent **dynrelbuf;
6683 const struct elf_x86_64_lazy_plt_layout *lazy_plt;
6684 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt;
6685 const struct elf_x86_64_lazy_plt_layout *lazy_bnd_plt;
6686 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_bnd_plt;
6687 const struct elf_x86_64_lazy_plt_layout *lazy_ibt_plt;
6688 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_ibt_plt;
6691 enum elf_x86_64_plt_type plt_type;
6692 struct elf_x86_64_plt plts[] =
6694 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
6695 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
6696 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
6697 { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 },
6698 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
6703 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
6706 if (dynsymcount <= 0)
6709 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
6713 dynrelbuf = (arelent **) bfd_malloc (relsize);
6714 if (dynrelbuf == NULL)
6717 dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf,
6720 /* Sort the relocs by address. */
6721 qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs);
6723 if (get_elf_x86_64_backend_data (abfd)->os == is_normal)
6725 lazy_plt = &elf_x86_64_lazy_plt;
6726 non_lazy_plt = &elf_x86_64_non_lazy_plt;
6727 lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt;
6728 non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt;
6729 if (ABI_64_P (abfd))
6731 lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
6732 non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
6736 lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
6737 non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
6742 lazy_plt = &elf_x86_64_nacl_plt;
6743 non_lazy_plt = NULL;
6744 lazy_bnd_plt = NULL;
6745 non_lazy_bnd_plt = NULL;
6746 lazy_ibt_plt = NULL;
6747 non_lazy_ibt_plt = NULL;
6751 for (j = 0; plts[j].name != NULL; j++)
6753 plt = bfd_get_section_by_name (abfd, plts[j].name);
6757 /* Get the PLT section contents. */
6758 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6759 if (plt_contents == NULL)
6761 if (!bfd_get_section_contents (abfd, (asection *) plt,
6762 plt_contents, 0, plt->size))
6764 free (plt_contents);
6768 /* Check what kind of PLT it is. */
6769 plt_type = plt_unknown;
6770 if (plts[j].type == plt_unknown)
6772 /* Match lazy PLT first. Need to check the first two
6774 if ((memcmp (plt_contents, lazy_plt->plt0_entry,
6775 lazy_plt->plt0_got1_offset) == 0)
6776 && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6,
6778 plt_type = plt_lazy;
6779 else if (lazy_bnd_plt != NULL
6780 && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry,
6781 lazy_bnd_plt->plt0_got1_offset) == 0)
6782 && (memcmp (plt_contents + 6,
6783 lazy_bnd_plt->plt0_entry + 6, 3) == 0))
6785 plt_type = plt_lazy | plt_second;
6786 /* The fist entry in the lazy IBT PLT is the same as the
6788 if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size,
6789 lazy_ibt_plt->plt_entry,
6790 lazy_ibt_plt->plt_got_offset) == 0))
6791 lazy_plt = lazy_ibt_plt;
6793 lazy_plt = lazy_bnd_plt;
6797 if (non_lazy_plt != NULL
6798 && (plt_type == plt_unknown || plt_type == plt_non_lazy))
6800 /* Match non-lazy PLT. */
6801 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
6802 non_lazy_plt->plt_got_offset) == 0)
6803 plt_type = plt_non_lazy;
6806 if (plt_type == plt_unknown || plt_type == plt_second)
6808 if (non_lazy_bnd_plt != NULL
6809 && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry,
6810 non_lazy_bnd_plt->plt_got_offset) == 0))
6812 /* Match BND PLT. */
6813 plt_type = plt_second;
6814 non_lazy_plt = non_lazy_bnd_plt;
6816 else if (non_lazy_ibt_plt != NULL
6817 && (memcmp (plt_contents,
6818 non_lazy_ibt_plt->plt_entry,
6819 non_lazy_ibt_plt->plt_got_offset) == 0))
6821 /* Match IBT PLT. */
6822 plt_type = plt_second;
6823 non_lazy_plt = non_lazy_ibt_plt;
6827 if (plt_type == plt_unknown)
6831 plts[j].type = plt_type;
6833 if ((plt_type & plt_lazy))
6835 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
6836 plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size;
6837 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
6838 /* Skip PLT0 in lazy PLT. */
6843 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
6844 plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size;
6845 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
6849 /* Skip lazy PLT when the second PLT is used. */
6850 if (plt_type == (plt_lazy | plt_second))
6854 n = plt->size / plts[j].plt_entry_size;
6859 plts[j].contents = plt_contents;
6862 size = count * sizeof (asymbol);
6863 s = *ret = (asymbol *) bfd_zmalloc (size);
6867 for (j = 0; plts[j].name != NULL; j++)
6868 if (plts[j].contents != NULL)
6869 free (plts[j].contents);
6874 /* Check for each PLT section. */
6877 for (j = 0; plts[j].name != NULL; j++)
6878 if ((plt_contents = plts[j].contents) != NULL)
6883 plt_got_offset = plts[j].plt_got_offset;
6884 plt_got_insn_size = plts[j].plt_got_insn_size;
6885 plt_entry_size = plts[j].plt_entry_size;
6889 if ((plts[j].type & plt_lazy))
6891 /* Skip PLT0 in lazy PLT. */
6893 offset = plt_entry_size;
6901 /* Check each PLT entry against dynamic relocations. */
6902 for (; k < plts[j].count; k++)
6909 /* Get the PC-relative offset, a signed 32-bit integer. */
6910 off = H_GET_32 (abfd, (plt_contents + offset
6912 got_vma = plt->vma + offset + off + plt_got_insn_size;
6914 /* Binary search. */
6918 while ((min + 1) < max)
6922 mid = (min + max) / 2;
6924 if (got_vma > r->address)
6926 else if (got_vma < r->address)
6935 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6936 if (got_vma == p->address
6938 && (p->howto->type == R_X86_64_JUMP_SLOT
6939 || p->howto->type == R_X86_64_GLOB_DAT
6940 || p->howto->type == R_X86_64_IRELATIVE))
6942 *s = **p->sym_ptr_ptr;
6943 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6944 set. Since we are defining a symbol, ensure one
6946 if ((s->flags & BSF_LOCAL) == 0)
6947 s->flags |= BSF_GLOBAL;
6948 s->flags |= BSF_SYNTHETIC;
6949 /* This is no longer a section symbol. */
6950 s->flags &= ~BSF_SECTION_SYM;
6952 s->the_bfd = plt->owner;
6954 /* Store relocation for later use. */
6956 /* Add @plt to function name later. */
6957 size += strlen (s->name) + sizeof ("@plt");
6959 size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd);
6963 offset += plt_entry_size;
6967 /* PLT entries with R_X86_64_TLSDESC relocations are skipped. */
6973 /* Allocate space for @plt suffixes. */
6974 names = (char *) bfd_malloc (size);
6979 for (i = 0; i < count; i++)
6981 /* Add @plt to function name. */
6982 arelent *p = (arelent *) s->udata.p;
6985 size = strlen (s->name);
6986 memcpy (names, s->name, size);
6993 memcpy (names, "+0x", sizeof ("+0x") - 1);
6994 names += sizeof ("+0x") - 1;
6995 bfd_sprintf_vma (abfd, buf, p->addend);
6996 for (a = buf; *a == '0'; ++a)
6999 memcpy (names, a, size);
7002 memcpy (names, "@plt", sizeof ("@plt"));
7003 names += sizeof ("@plt");
7007 for (j = 0; plts[j].name != NULL; j++)
7008 if (plts[j].contents != NULL)
7009 free (plts[j].contents);
7016 /* Handle an x86-64 specific section when reading an object file. This
7017 is called when elfcode.h finds a section with an unknown type. */
7020 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
7021 const char *name, int shindex)
7023 if (hdr->sh_type != SHT_X86_64_UNWIND)
7026 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
7032 /* Hook called by the linker routine which adds symbols from an object
7033 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
7037 elf_x86_64_add_symbol_hook (bfd *abfd,
7038 struct bfd_link_info *info ATTRIBUTE_UNUSED,
7039 Elf_Internal_Sym *sym,
7040 const char **namep ATTRIBUTE_UNUSED,
7041 flagword *flagsp ATTRIBUTE_UNUSED,
7047 switch (sym->st_shndx)
7049 case SHN_X86_64_LCOMMON:
7050 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
7053 lcomm = bfd_make_section_with_flags (abfd,
7057 | SEC_LINKER_CREATED));
7060 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
7063 *valp = sym->st_size;
7071 /* Given a BFD section, try to locate the corresponding ELF section
7075 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
7076 asection *sec, int *index_return)
7078 if (sec == &_bfd_elf_large_com_section)
7080 *index_return = SHN_X86_64_LCOMMON;
7086 /* Process a symbol. */
7089 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
7092 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
7094 switch (elfsym->internal_elf_sym.st_shndx)
7096 case SHN_X86_64_LCOMMON:
7097 asym->section = &_bfd_elf_large_com_section;
7098 asym->value = elfsym->internal_elf_sym.st_size;
7099 /* Common symbol doesn't set BSF_GLOBAL. */
7100 asym->flags &= ~BSF_GLOBAL;
7106 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
7108 return (sym->st_shndx == SHN_COMMON
7109 || sym->st_shndx == SHN_X86_64_LCOMMON);
7113 elf_x86_64_common_section_index (asection *sec)
7115 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
7118 return SHN_X86_64_LCOMMON;
7122 elf_x86_64_common_section (asection *sec)
7124 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
7125 return bfd_com_section_ptr;
7127 return &_bfd_elf_large_com_section;
7131 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
7132 const Elf_Internal_Sym *sym,
7137 const asection *oldsec)
7139 /* A normal common symbol and a large common symbol result in a
7140 normal common symbol. We turn the large common symbol into a
7143 && h->root.type == bfd_link_hash_common
7145 && bfd_is_com_section (*psec)
7148 if (sym->st_shndx == SHN_COMMON
7149 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
7151 h->root.u.c.p->section
7152 = bfd_make_section_old_way (oldbfd, "COMMON");
7153 h->root.u.c.p->section->flags = SEC_ALLOC;
7155 else if (sym->st_shndx == SHN_X86_64_LCOMMON
7156 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
7157 *psec = bfd_com_section_ptr;
7164 elf_x86_64_additional_program_headers (bfd *abfd,
7165 struct bfd_link_info *info ATTRIBUTE_UNUSED)
7170 /* Check to see if we need a large readonly segment. */
7171 s = bfd_get_section_by_name (abfd, ".lrodata");
7172 if (s && (s->flags & SEC_LOAD))
7175 /* Check to see if we need a large data segment. Since .lbss sections
7176 is placed right after the .bss section, there should be no need for
7177 a large data segment just because of .lbss. */
7178 s = bfd_get_section_by_name (abfd, ".ldata");
7179 if (s && (s->flags & SEC_LOAD))
7185 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7188 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
7190 if (h->plt.offset != (bfd_vma) -1
7192 && !h->pointer_equality_needed)
7195 return _bfd_elf_hash_symbol (h);
7198 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
7201 elf_x86_64_relocs_compatible (const bfd_target *input,
7202 const bfd_target *output)
7204 return ((xvec_get_elf_backend_data (input)->s->elfclass
7205 == xvec_get_elf_backend_data (output)->s->elfclass)
7206 && _bfd_elf_relocs_compatible (input, output));
7209 /* Parse x86-64 GNU properties. */
7211 static enum elf_property_kind
7212 elf_x86_64_parse_gnu_properties (bfd *abfd, unsigned int type,
7213 bfd_byte *ptr, unsigned int datasz)
7219 case GNU_PROPERTY_X86_ISA_1_USED:
7220 case GNU_PROPERTY_X86_ISA_1_NEEDED:
7221 case GNU_PROPERTY_X86_FEATURE_1_AND:
7225 ((type == GNU_PROPERTY_X86_ISA_1_USED
7226 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
7227 : (type == GNU_PROPERTY_X86_ISA_1_NEEDED
7228 ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>")
7229 : _("error: %B: <corrupt x86 feature size: 0x%x>"))),
7231 return property_corrupt;
7233 prop = _bfd_elf_get_property (abfd, type, datasz);
7234 /* Combine properties of the same type. */
7235 prop->u.number |= bfd_h_get_32 (abfd, ptr);
7236 prop->pr_kind = property_number;
7240 return property_ignored;
7243 return property_number;
7246 /* Merge x86-64 GNU property BPROP with APROP. If APROP isn't NULL,
7247 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
7248 should be merged with ABFD. */
7251 elf_x86_64_merge_gnu_properties (struct bfd_link_info *info,
7252 bfd *abfd ATTRIBUTE_UNUSED,
7253 elf_property *aprop,
7254 elf_property *bprop)
7256 unsigned int number, features;
7257 bfd_boolean updated = FALSE;
7258 unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
7262 case GNU_PROPERTY_X86_ISA_1_USED:
7263 case GNU_PROPERTY_X86_ISA_1_NEEDED:
7264 if (aprop != NULL && bprop != NULL)
7266 number = aprop->u.number;
7267 aprop->u.number = number | bprop->u.number;
7268 updated = number != (unsigned int) aprop->u.number;
7272 /* Return TRUE if APROP is NULL to indicate that BPROP should
7273 be added to ABFD. */
7274 updated = aprop == NULL;
7278 case GNU_PROPERTY_X86_FEATURE_1_AND:
7279 /* Only one of APROP and BPROP can be NULL:
7280 1. APROP & BPROP when both APROP and BPROP aren't NULL.
7281 2. If APROP is NULL, remove x86 feature.
7282 3. Otherwise, do nothing.
7284 if (aprop != NULL && bprop != NULL)
7288 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7289 number = aprop->u.number;
7290 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT. */
7291 aprop->u.number = (number & bprop->u.number) | features;
7292 updated = number != (unsigned int) aprop->u.number;
7293 /* Remove the property if all feature bits are cleared. */
7294 if (aprop->u.number == 0)
7295 aprop->pr_kind = property_remove;
7301 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7304 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT. */
7307 number = aprop->u.number;
7308 aprop->u.number = number | features;
7309 updated = number != (unsigned int) aprop->u.number;
7313 bprop->u.number |= features;
7317 else if (aprop != NULL)
7319 aprop->pr_kind = property_remove;
7326 /* Never should happen. */
7333 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
7334 with GNU properties if found. Otherwise, return NULL. */
7337 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info)
7339 bfd_boolean normal_target;
7340 bfd_boolean lazy_plt;
7341 asection *sec, *pltsec;
7343 bfd_boolean use_ibt_plt;
7344 unsigned int plt_alignment, features;
7345 struct elf_x86_64_link_hash_table *htab;
7350 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7353 /* Turn on GNU_PROPERTY_X86_FEATURE_1_IBT. */
7357 for (pbfd = info->input_bfds;
7359 pbfd = pbfd->link.next)
7360 if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
7361 && bfd_count_sections (pbfd) != 0)
7365 if (elf_properties (pbfd) != NULL)
7367 /* Find a normal input file with GNU property note. */
7368 prop = _bfd_elf_get_property (pbfd,
7369 GNU_PROPERTY_X86_FEATURE_1_AND,
7371 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT. */
7372 prop->u.number |= features;
7373 prop->pr_kind = property_number;
7378 if (pbfd == NULL && ebfd != NULL)
7380 /* Create GNU_PROPERTY_X86_FEATURE_1_IBT if needed. */
7381 prop = _bfd_elf_get_property (ebfd,
7382 GNU_PROPERTY_X86_FEATURE_1_AND,
7384 prop->u.number = features;
7385 prop->pr_kind = property_number;
7387 sec = bfd_make_section_with_flags (ebfd,
7388 NOTE_GNU_PROPERTY_SECTION_NAME,
7396 info->callbacks->einfo (_("%F: failed to create GNU property section\n"));
7398 if (!bfd_set_section_alignment (ebfd, sec, 2))
7399 goto error_alignment;
7401 elf_section_type (sec) = SHT_NOTE;
7405 pbfd = _bfd_elf_link_setup_gnu_properties (info);
7407 if (bfd_link_relocatable (info))
7410 htab = elf_x86_64_hash_table (info);
7414 use_ibt_plt = info->ibtplt || info->ibt;
7415 if (!use_ibt_plt && pbfd != NULL)
7417 /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */
7418 elf_property_list *p;
7420 /* The property list is sorted in order of type. */
7421 for (p = elf_properties (pbfd); p; p = p->next)
7423 if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type)
7425 use_ibt_plt = !!(p->property.u.number
7426 & GNU_PROPERTY_X86_FEATURE_1_IBT);
7429 else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type)
7434 dynobj = htab->elf.dynobj;
7436 /* Set htab->elf.dynobj here so that there is no need to check and
7437 set it in check_relocs. */
7442 htab->elf.dynobj = pbfd;
7449 /* Find a normal input file to hold linker created
7451 for (abfd = info->input_bfds;
7453 abfd = abfd->link.next)
7455 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
7457 htab->elf.dynobj = abfd;
7464 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
7465 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
7466 canonical function address. */
7467 htab->plt.has_plt0 = 1;
7469 if (get_elf_x86_64_backend_data (info->output_bfd)->os
7474 if (ABI_64_P (dynobj))
7476 htab->lazy_plt = &elf_x86_64_lazy_ibt_plt;
7477 htab->non_lazy_plt = &elf_x86_64_non_lazy_ibt_plt;
7481 htab->lazy_plt = &elf_x32_lazy_ibt_plt;
7482 htab->non_lazy_plt = &elf_x32_non_lazy_ibt_plt;
7485 else if (info->bndplt)
7487 htab->lazy_plt = &elf_x86_64_lazy_bnd_plt;
7488 htab->non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt;
7492 htab->lazy_plt = &elf_x86_64_lazy_plt;
7493 htab->non_lazy_plt = &elf_x86_64_non_lazy_plt;
7495 normal_target = TRUE;
7499 htab->lazy_plt = &elf_x86_64_nacl_plt;
7500 htab->non_lazy_plt = NULL;
7501 normal_target = FALSE;
7504 pltsec = htab->elf.splt;
7506 /* If the non-lazy PLT is available, use it for all PLT entries if
7507 there are no PLT0 or no .plt section. */
7508 if (htab->non_lazy_plt != NULL
7509 && (!htab->plt.has_plt0 || pltsec == NULL))
7513 = htab->non_lazy_plt->plt_entry;
7514 htab->plt.plt_entry_size
7515 = htab->non_lazy_plt->plt_entry_size;
7516 htab->plt.plt_got_offset
7517 = htab->non_lazy_plt->plt_got_offset;
7518 htab->plt.plt_got_insn_size
7519 = htab->non_lazy_plt->plt_got_insn_size;
7520 htab->plt.eh_frame_plt_size
7521 = htab->non_lazy_plt->eh_frame_plt_size;
7522 htab->plt.eh_frame_plt
7523 = htab->non_lazy_plt->eh_frame_plt;
7529 = htab->lazy_plt->plt_entry;
7530 htab->plt.plt_entry_size
7531 = htab->lazy_plt->plt_entry_size;
7532 htab->plt.plt_got_offset
7533 = htab->lazy_plt->plt_got_offset;
7534 htab->plt.plt_got_insn_size
7535 = htab->lazy_plt->plt_got_insn_size;
7536 htab->plt.eh_frame_plt_size
7537 = htab->lazy_plt->eh_frame_plt_size;
7538 htab->plt.eh_frame_plt
7539 = htab->lazy_plt->eh_frame_plt;
7542 /* Return if there are no normal input files. */
7546 /* Since create_dynamic_sections isn't always called, but GOT
7547 relocations need GOT relocations, create them here so that we
7548 don't need to do it in check_relocs. */
7549 if (htab->elf.sgot == NULL
7550 && !_bfd_elf_create_got_section (dynobj, info))
7551 info->callbacks->einfo (_("%F: failed to create GOT sections\n"));
7553 /* Align .got and .got.plt sections to their entry size. Do it here
7554 instead of in create_dynamic_sections so that they are always
7555 properly aligned even if create_dynamic_sections isn't called. */
7556 sec = htab->elf.sgot;
7557 if (!bfd_set_section_alignment (dynobj, sec, 3))
7560 info->callbacks->einfo (_("%F%A: failed to align section\n"),
7564 sec = htab->elf.sgotplt;
7565 if (!bfd_set_section_alignment (dynobj, sec, 3))
7566 goto error_alignment;
7568 /* Create the ifunc sections here so that check_relocs can be
7570 if (!_bfd_elf_create_ifunc_sections (dynobj, info))
7571 info->callbacks->einfo (_("%F: failed to create ifunc sections\n"));
7573 plt_alignment = bfd_log2 (htab->plt.plt_entry_size);
7577 /* Whe creating executable, set the contents of the .interp
7578 section to the interpreter. */
7579 if (bfd_link_executable (info) && !info->nointerp)
7581 asection *s = bfd_get_linker_section (dynobj, ".interp");
7584 s->size = htab->dynamic_interpreter_size;
7585 s->contents = (unsigned char *) htab->dynamic_interpreter;
7589 /* Don't change PLT section alignment for NaCl since it uses
7590 64-byte PLT entry and sets PLT section alignment to 32
7591 bytes. Don't create additional PLT sections for NaCl. */
7594 const struct elf_backend_data *bed
7595 = get_elf_backend_data (dynobj);
7596 flagword pltflags = (bed->dynamic_sec_flags
7601 unsigned int non_lazy_plt_alignment
7602 = bfd_log2 (htab->non_lazy_plt->plt_entry_size);
7605 if (!bfd_set_section_alignment (sec->owner, sec,
7607 goto error_alignment;
7609 /* Create the GOT procedure linkage table. */
7610 sec = bfd_make_section_anyway_with_flags (dynobj,
7614 info->callbacks->einfo (_("%F: failed to create GOT PLT section\n"));
7616 if (!bfd_set_section_alignment (dynobj, sec,
7617 non_lazy_plt_alignment))
7618 goto error_alignment;
7620 htab->plt_got = sec;
7628 /* Create the second PLT for Intel IBT support. IBT
7629 PLT is supported only for non-NaCl target and is
7630 is needed only for lazy binding. */
7631 sec = bfd_make_section_anyway_with_flags (dynobj,
7635 info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n"));
7637 if (!bfd_set_section_alignment (dynobj, sec,
7639 goto error_alignment;
7641 else if (info->bndplt && ABI_64_P (dynobj))
7643 /* Create the second PLT for Intel MPX support. MPX
7644 PLT is supported only for non-NaCl target in 64-bit
7645 mode and is needed only for lazy binding. */
7646 sec = bfd_make_section_anyway_with_flags (dynobj,
7650 info->callbacks->einfo (_("%F: failed to create BND PLT section\n"));
7652 if (!bfd_set_section_alignment (dynobj, sec,
7653 non_lazy_plt_alignment))
7654 goto error_alignment;
7657 htab->plt_second = sec;
7661 if (!info->no_ld_generated_unwind_info)
7663 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
7664 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7665 | SEC_LINKER_CREATED);
7667 sec = bfd_make_section_anyway_with_flags (dynobj,
7671 info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n"));
7673 if (!bfd_set_section_alignment (dynobj, sec,
7674 ABI_64_P (dynobj) ? 3 : 2))
7675 goto error_alignment;
7677 htab->plt_eh_frame = sec;
7679 if (htab->plt_got != NULL)
7681 sec = bfd_make_section_anyway_with_flags (dynobj,
7685 info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
7687 if (!bfd_set_section_alignment (dynobj, sec,
7688 ABI_64_P (dynobj) ? 3 : 2))
7689 goto error_alignment;
7691 htab->plt_got_eh_frame = sec;
7694 if (htab->plt_second != NULL)
7696 sec = bfd_make_section_anyway_with_flags (dynobj,
7700 info->callbacks->einfo (_("%F: failed to create BND PLT .eh_frame section\n"));
7702 if (!bfd_set_section_alignment (dynobj, sec, 3))
7703 goto error_alignment;
7705 htab->plt_second_eh_frame = sec;
7712 /* The .iplt section is used for IFUNC symbols in static
7714 sec = htab->elf.iplt;
7716 && !bfd_set_section_alignment (sec->owner, sec,
7718 goto error_alignment;
7724 static const struct bfd_elf_special_section
7725 elf_x86_64_special_sections[]=
7727 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7728 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
7729 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
7730 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7731 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7732 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
7733 { NULL, 0, 0, 0, 0 }
7736 #define TARGET_LITTLE_SYM x86_64_elf64_vec
7737 #define TARGET_LITTLE_NAME "elf64-x86-64"
7738 #define ELF_ARCH bfd_arch_i386
7739 #define ELF_TARGET_ID X86_64_ELF_DATA
7740 #define ELF_MACHINE_CODE EM_X86_64
7741 #define ELF_MAXPAGESIZE 0x200000
7742 #define ELF_MINPAGESIZE 0x1000
7743 #define ELF_COMMONPAGESIZE 0x1000
7745 #define elf_backend_can_gc_sections 1
7746 #define elf_backend_can_refcount 1
7747 #define elf_backend_want_got_plt 1
7748 #define elf_backend_plt_readonly 1
7749 #define elf_backend_want_plt_sym 0
7750 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
7751 #define elf_backend_rela_normal 1
7752 #define elf_backend_plt_alignment 4
7753 #define elf_backend_extern_protected_data 1
7754 #define elf_backend_caches_rawsize 1
7755 #define elf_backend_dtrel_excludes_plt 1
7756 #define elf_backend_want_dynrelro 1
7758 #define elf_info_to_howto elf_x86_64_info_to_howto
7760 #define bfd_elf64_bfd_link_hash_table_create \
7761 elf_x86_64_link_hash_table_create
7762 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
7763 #define bfd_elf64_bfd_reloc_name_lookup \
7764 elf_x86_64_reloc_name_lookup
7766 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
7767 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
7768 #define elf_backend_check_relocs elf_x86_64_check_relocs
7769 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
7770 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
7771 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
7772 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
7773 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
7774 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
7775 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
7776 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
7778 #define elf_backend_write_core_note elf_x86_64_write_core_note
7780 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
7781 #define elf_backend_relocate_section elf_x86_64_relocate_section
7782 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
7783 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
7784 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7785 #define elf_backend_object_p elf64_x86_64_elf_object_p
7786 #define bfd_elf64_mkobject elf_x86_64_mkobject
7787 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
7789 #define elf_backend_section_from_shdr \
7790 elf_x86_64_section_from_shdr
7792 #define elf_backend_section_from_bfd_section \
7793 elf_x86_64_elf_section_from_bfd_section
7794 #define elf_backend_add_symbol_hook \
7795 elf_x86_64_add_symbol_hook
7796 #define elf_backend_symbol_processing \
7797 elf_x86_64_symbol_processing
7798 #define elf_backend_common_section_index \
7799 elf_x86_64_common_section_index
7800 #define elf_backend_common_section \
7801 elf_x86_64_common_section
7802 #define elf_backend_common_definition \
7803 elf_x86_64_common_definition
7804 #define elf_backend_merge_symbol \
7805 elf_x86_64_merge_symbol
7806 #define elf_backend_special_sections \
7807 elf_x86_64_special_sections
7808 #define elf_backend_additional_program_headers \
7809 elf_x86_64_additional_program_headers
7810 #define elf_backend_hash_symbol \
7811 elf_x86_64_hash_symbol
7812 #define elf_backend_omit_section_dynsym \
7813 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
7814 #define elf_backend_fixup_symbol \
7815 elf_x86_64_fixup_symbol
7816 #define elf_backend_parse_gnu_properties \
7817 elf_x86_64_parse_gnu_properties
7818 #define elf_backend_merge_gnu_properties \
7819 elf_x86_64_merge_gnu_properties
7820 #define elf_backend_setup_gnu_properties \
7821 elf_x86_64_link_setup_gnu_properties
7823 #include "elf64-target.h"
7825 /* CloudABI support. */
7827 #undef TARGET_LITTLE_SYM
7828 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
7829 #undef TARGET_LITTLE_NAME
7830 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
7833 #define ELF_OSABI ELFOSABI_CLOUDABI
7836 #define elf64_bed elf64_x86_64_cloudabi_bed
7838 #include "elf64-target.h"
7840 /* FreeBSD support. */
7842 #undef TARGET_LITTLE_SYM
7843 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
7844 #undef TARGET_LITTLE_NAME
7845 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
7848 #define ELF_OSABI ELFOSABI_FREEBSD
7851 #define elf64_bed elf64_x86_64_fbsd_bed
7853 #include "elf64-target.h"
7855 /* Solaris 2 support. */
7857 #undef TARGET_LITTLE_SYM
7858 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
7859 #undef TARGET_LITTLE_NAME
7860 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
7862 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
7863 objects won't be recognized. */
7867 #define elf64_bed elf64_x86_64_sol2_bed
7869 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
7871 #undef elf_backend_static_tls_alignment
7872 #define elf_backend_static_tls_alignment 16
7874 /* The Solaris 2 ABI requires a plt symbol on all platforms.
7876 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
7878 #undef elf_backend_want_plt_sym
7879 #define elf_backend_want_plt_sym 1
7881 #undef elf_backend_strtab_flags
7882 #define elf_backend_strtab_flags SHF_STRINGS
7885 elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
7886 bfd *obfd ATTRIBUTE_UNUSED,
7887 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
7888 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
7890 /* PR 19938: FIXME: Need to add code for setting the sh_info
7891 and sh_link fields of Solaris specific section types. */
7895 #undef elf_backend_copy_special_section_fields
7896 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
7898 #include "elf64-target.h"
7900 /* Native Client support. */
7903 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
7905 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
7906 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
7910 #undef TARGET_LITTLE_SYM
7911 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
7912 #undef TARGET_LITTLE_NAME
7913 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
7915 #define elf64_bed elf64_x86_64_nacl_bed
7917 #undef ELF_MAXPAGESIZE
7918 #undef ELF_MINPAGESIZE
7919 #undef ELF_COMMONPAGESIZE
7920 #define ELF_MAXPAGESIZE 0x10000
7921 #define ELF_MINPAGESIZE 0x10000
7922 #define ELF_COMMONPAGESIZE 0x10000
7924 /* Restore defaults. */
7926 #undef elf_backend_static_tls_alignment
7927 #undef elf_backend_want_plt_sym
7928 #define elf_backend_want_plt_sym 0
7929 #undef elf_backend_strtab_flags
7930 #undef elf_backend_copy_special_section_fields
7932 /* NaCl uses substantially different PLT entries for the same effects. */
7934 #undef elf_backend_plt_alignment
7935 #define elf_backend_plt_alignment 5
7936 #define NACL_PLT_ENTRY_SIZE 64
7937 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
7939 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
7941 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
7942 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
7943 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
7944 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
7945 0x41, 0xff, 0xe3, /* jmpq *%r11 */
7947 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
7948 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
7950 /* 32 bytes of nop to pad out to the standard size. */
7951 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7952 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7953 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7954 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7955 0x66, /* excess data16 prefix */
7959 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
7961 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
7962 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
7963 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
7964 0x41, 0xff, 0xe3, /* jmpq *%r11 */
7966 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
7967 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7968 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7970 /* Lazy GOT entries point here (32-byte aligned). */
7971 0x68, /* pushq immediate */
7972 0, 0, 0, 0, /* replaced with index into relocation table. */
7973 0xe9, /* jmp relative */
7974 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
7976 /* 22 bytes of nop to pad out to the standard size. */
7977 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7978 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7979 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
7982 /* .eh_frame covering the .plt section. */
7984 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
7986 #if (PLT_CIE_LENGTH != 20 \
7987 || PLT_FDE_LENGTH != 36 \
7988 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
7989 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
7990 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
7992 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
7993 0, 0, 0, 0, /* CIE ID */
7994 1, /* CIE version */
7995 'z', 'R', 0, /* Augmentation string */
7996 1, /* Code alignment factor */
7997 0x78, /* Data alignment factor */
7998 16, /* Return address column */
7999 1, /* Augmentation size */
8000 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
8001 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
8002 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
8003 DW_CFA_nop, DW_CFA_nop,
8005 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
8006 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
8007 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
8008 0, 0, 0, 0, /* .plt size goes here */
8009 0, /* Augmentation size */
8010 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
8011 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
8012 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
8013 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
8014 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
8015 13, /* Block length */
8016 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
8017 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
8018 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
8019 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
8020 DW_CFA_nop, DW_CFA_nop
8023 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt =
8025 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
8026 elf_x86_64_nacl_plt_entry, /* plt_entry */
8027 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
8028 2, /* plt0_got1_offset */
8029 9, /* plt0_got2_offset */
8030 13, /* plt0_got2_insn_end */
8031 3, /* plt_got_offset */
8032 33, /* plt_reloc_offset */
8033 38, /* plt_plt_offset */
8034 7, /* plt_got_insn_size */
8035 42, /* plt_plt_insn_end */
8036 32, /* plt_lazy_offset */
8037 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
8038 sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */
8041 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
8046 #undef elf_backend_arch_data
8047 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
8049 #undef elf_backend_object_p
8050 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
8051 #undef elf_backend_modify_segment_map
8052 #define elf_backend_modify_segment_map nacl_modify_segment_map
8053 #undef elf_backend_modify_program_headers
8054 #define elf_backend_modify_program_headers nacl_modify_program_headers
8055 #undef elf_backend_final_write_processing
8056 #define elf_backend_final_write_processing nacl_final_write_processing
8058 #include "elf64-target.h"
8060 /* Native Client x32 support. */
8063 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
8065 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
8066 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
8070 #undef TARGET_LITTLE_SYM
8071 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
8072 #undef TARGET_LITTLE_NAME
8073 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
8075 #define elf32_bed elf32_x86_64_nacl_bed
8077 #define bfd_elf32_bfd_link_hash_table_create \
8078 elf_x86_64_link_hash_table_create
8079 #define bfd_elf32_bfd_reloc_type_lookup \
8080 elf_x86_64_reloc_type_lookup
8081 #define bfd_elf32_bfd_reloc_name_lookup \
8082 elf_x86_64_reloc_name_lookup
8083 #define bfd_elf32_mkobject \
8085 #define bfd_elf32_get_synthetic_symtab \
8086 elf_x86_64_get_synthetic_symtab
8088 #undef elf_backend_object_p
8089 #define elf_backend_object_p \
8090 elf32_x86_64_nacl_elf_object_p
8092 #undef elf_backend_bfd_from_remote_memory
8093 #define elf_backend_bfd_from_remote_memory \
8094 _bfd_elf32_bfd_from_remote_memory
8096 #undef elf_backend_size_info
8097 #define elf_backend_size_info \
8098 _bfd_elf32_size_info
8100 #include "elf32-target.h"
8102 /* Restore defaults. */
8103 #undef elf_backend_object_p
8104 #define elf_backend_object_p elf64_x86_64_elf_object_p
8105 #undef elf_backend_bfd_from_remote_memory
8106 #undef elf_backend_size_info
8107 #undef elf_backend_modify_segment_map
8108 #undef elf_backend_modify_program_headers
8109 #undef elf_backend_final_write_processing
8111 /* Intel L1OM support. */
8114 elf64_l1om_elf_object_p (bfd *abfd)
8116 /* Set the right machine number for an L1OM elf64 file. */
8117 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
8121 #undef TARGET_LITTLE_SYM
8122 #define TARGET_LITTLE_SYM l1om_elf64_vec
8123 #undef TARGET_LITTLE_NAME
8124 #define TARGET_LITTLE_NAME "elf64-l1om"
8126 #define ELF_ARCH bfd_arch_l1om
8128 #undef ELF_MACHINE_CODE
8129 #define ELF_MACHINE_CODE EM_L1OM
8134 #define elf64_bed elf64_l1om_bed
8136 #undef elf_backend_object_p
8137 #define elf_backend_object_p elf64_l1om_elf_object_p
8139 /* Restore defaults. */
8140 #undef ELF_MAXPAGESIZE
8141 #undef ELF_MINPAGESIZE
8142 #undef ELF_COMMONPAGESIZE
8143 #define ELF_MAXPAGESIZE 0x200000
8144 #define ELF_MINPAGESIZE 0x1000
8145 #define ELF_COMMONPAGESIZE 0x1000
8146 #undef elf_backend_plt_alignment
8147 #define elf_backend_plt_alignment 4
8148 #undef elf_backend_arch_data
8149 #define elf_backend_arch_data &elf_x86_64_arch_bed
8151 #include "elf64-target.h"
8153 /* FreeBSD L1OM support. */
8155 #undef TARGET_LITTLE_SYM
8156 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
8157 #undef TARGET_LITTLE_NAME
8158 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
8161 #define ELF_OSABI ELFOSABI_FREEBSD
8164 #define elf64_bed elf64_l1om_fbsd_bed
8166 #include "elf64-target.h"
8168 /* Intel K1OM support. */
8171 elf64_k1om_elf_object_p (bfd *abfd)
8173 /* Set the right machine number for an K1OM elf64 file. */
8174 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
8178 #undef TARGET_LITTLE_SYM
8179 #define TARGET_LITTLE_SYM k1om_elf64_vec
8180 #undef TARGET_LITTLE_NAME
8181 #define TARGET_LITTLE_NAME "elf64-k1om"
8183 #define ELF_ARCH bfd_arch_k1om
8185 #undef ELF_MACHINE_CODE
8186 #define ELF_MACHINE_CODE EM_K1OM
8191 #define elf64_bed elf64_k1om_bed
8193 #undef elf_backend_object_p
8194 #define elf_backend_object_p elf64_k1om_elf_object_p
8196 #undef elf_backend_static_tls_alignment
8198 #undef elf_backend_want_plt_sym
8199 #define elf_backend_want_plt_sym 0
8201 #include "elf64-target.h"
8203 /* FreeBSD K1OM support. */
8205 #undef TARGET_LITTLE_SYM
8206 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
8207 #undef TARGET_LITTLE_NAME
8208 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
8211 #define ELF_OSABI ELFOSABI_FREEBSD
8214 #define elf64_bed elf64_k1om_fbsd_bed
8216 #include "elf64-target.h"
8218 /* 32bit x86-64 support. */
8220 #undef TARGET_LITTLE_SYM
8221 #define TARGET_LITTLE_SYM x86_64_elf32_vec
8222 #undef TARGET_LITTLE_NAME
8223 #define TARGET_LITTLE_NAME "elf32-x86-64"
8227 #define ELF_ARCH bfd_arch_i386
8229 #undef ELF_MACHINE_CODE
8230 #define ELF_MACHINE_CODE EM_X86_64
8234 #undef elf_backend_object_p
8235 #define elf_backend_object_p \
8236 elf32_x86_64_elf_object_p
8238 #undef elf_backend_bfd_from_remote_memory
8239 #define elf_backend_bfd_from_remote_memory \
8240 _bfd_elf32_bfd_from_remote_memory
8242 #undef elf_backend_size_info
8243 #define elf_backend_size_info \
8244 _bfd_elf32_size_info
8246 #include "elf32-target.h"