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 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.
1053 Local undefined weak symbol is always resolved to 0.
1055 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
1056 ((EH)->elf.root.type == bfd_link_hash_undefweak \
1057 && ((EH)->elf.forced_local \
1058 || (bfd_link_executable (INFO) \
1059 && (elf_x86_64_hash_table (INFO)->interp == NULL \
1061 || (EH)->has_non_got_reloc \
1062 || !(INFO)->dynamic_undefined_weak))))
1064 /* Should copy relocation be generated for a symbol. Don't generate
1065 copy relocation against a protected symbol defined in a shared
1066 object with GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
1067 #define SYMBOL_NO_COPYRELOC(INFO, EH) \
1068 ((EH)->def_protected \
1069 && ((EH)->elf.root.type == bfd_link_hash_defined \
1070 || (EH)->elf.root.type == bfd_link_hash_defweak) \
1071 && elf_has_no_copy_on_protected ((EH)->elf.root.u.def.section->owner) \
1072 && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \
1073 && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0)
1075 /* x86-64 ELF linker hash entry. */
1077 struct elf_x86_64_link_hash_entry
1079 struct elf_link_hash_entry elf;
1081 /* Track dynamic relocs copied for this symbol. */
1082 struct elf_dyn_relocs *dyn_relocs;
1084 #define GOT_UNKNOWN 0
1085 #define GOT_NORMAL 1
1086 #define GOT_TLS_GD 2
1087 #define GOT_TLS_IE 3
1088 #define GOT_TLS_GDESC 4
1089 #define GOT_TLS_GD_BOTH_P(type) \
1090 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
1091 #define GOT_TLS_GD_P(type) \
1092 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
1093 #define GOT_TLS_GDESC_P(type) \
1094 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
1095 #define GOT_TLS_GD_ANY_P(type) \
1096 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
1097 unsigned char tls_type;
1099 /* TRUE if a weak symbol with a real definition needs a copy reloc.
1100 When there is a weak symbol with a real definition, the processor
1101 independent code will have arranged for us to see the real
1102 definition first. We need to copy the needs_copy bit from the
1103 real definition and check it when allowing copy reloc in PIE. */
1104 unsigned int needs_copy : 1;
1106 /* TRUE if symbol has GOT or PLT relocations. */
1107 unsigned int has_got_reloc : 1;
1109 /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */
1110 unsigned int has_non_got_reloc : 1;
1112 /* Don't call finish_dynamic_symbol on this symbol. */
1113 unsigned int no_finish_dynamic_symbol : 1;
1115 /* TRUE if symbol is __tls_get_addr. */
1116 unsigned int tls_get_addr : 1;
1118 /* TRUE if symbol is defined as a protected symbol. */
1119 unsigned int def_protected : 1;
1121 /* Reference count of C/C++ function pointer relocations in read-write
1122 section which can be resolved at run-time. */
1123 bfd_signed_vma func_pointer_refcount;
1125 /* Information about the GOT PLT entry. Filled when there are both
1126 GOT and PLT relocations against the same function. */
1127 union gotplt_union plt_got;
1129 /* Information about the second PLT entry. */
1130 union gotplt_union plt_second;
1132 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
1133 starting at the end of the jump table. */
1134 bfd_vma tlsdesc_got;
1137 #define elf_x86_64_hash_entry(ent) \
1138 ((struct elf_x86_64_link_hash_entry *)(ent))
1140 struct elf_x86_64_obj_tdata
1142 struct elf_obj_tdata root;
1144 /* tls_type for each local got entry. */
1145 char *local_got_tls_type;
1147 /* GOTPLT entries for TLS descriptors. */
1148 bfd_vma *local_tlsdesc_gotent;
1151 #define elf_x86_64_tdata(abfd) \
1152 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
1154 #define elf_x86_64_local_got_tls_type(abfd) \
1155 (elf_x86_64_tdata (abfd)->local_got_tls_type)
1157 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
1158 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
1160 #define is_x86_64_elf(bfd) \
1161 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1162 && elf_tdata (bfd) != NULL \
1163 && elf_object_id (bfd) == X86_64_ELF_DATA)
1166 elf_x86_64_mkobject (bfd *abfd)
1168 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
1172 /* x86-64 ELF linker hash table. */
1174 struct elf_x86_64_link_hash_table
1176 struct elf_link_hash_table elf;
1178 /* Short-cuts to get to dynamic linker sections. */
1180 asection *plt_eh_frame;
1181 asection *plt_second;
1182 asection *plt_second_eh_frame;
1184 asection *plt_got_eh_frame;
1186 /* Parameters describing PLT generation, lazy or non-lazy. */
1187 struct elf_x86_64_plt_layout plt;
1189 /* Parameters describing lazy PLT generation. */
1190 const struct elf_x86_64_lazy_plt_layout *lazy_plt;
1192 /* Parameters describing non-lazy PLT generation. */
1193 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt;
1197 bfd_signed_vma refcount;
1201 /* The amount of space used by the jump slots in the GOT. */
1202 bfd_vma sgotplt_jump_table_size;
1204 /* Small local sym cache. */
1205 struct sym_cache sym_cache;
1207 bfd_vma (*r_info) (bfd_vma, bfd_vma);
1208 bfd_vma (*r_sym) (bfd_vma);
1209 unsigned int pointer_r_type;
1210 const char *dynamic_interpreter;
1211 int dynamic_interpreter_size;
1213 /* _TLS_MODULE_BASE_ symbol. */
1214 struct bfd_link_hash_entry *tls_module_base;
1216 /* Used by local STT_GNU_IFUNC symbols. */
1217 htab_t loc_hash_table;
1218 void * loc_hash_memory;
1220 /* The offset into splt of the PLT entry for the TLS descriptor
1221 resolver. Special values are 0, if not necessary (or not found
1222 to be necessary yet), and -1 if needed but not determined
1224 bfd_vma tlsdesc_plt;
1225 /* The offset into sgot of the GOT entry used by the PLT entry
1227 bfd_vma tlsdesc_got;
1229 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
1230 bfd_vma next_jump_slot_index;
1231 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
1232 bfd_vma next_irelative_index;
1234 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
1235 to read-only sections. */
1236 bfd_boolean readonly_dynrelocs_against_ifunc;
1239 /* Get the x86-64 ELF linker hash table from a link_info structure. */
1241 #define elf_x86_64_hash_table(p) \
1242 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
1243 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
1245 #define elf_x86_64_compute_jump_table_size(htab) \
1246 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
1248 /* Create an entry in an x86-64 ELF linker hash table. */
1250 static struct bfd_hash_entry *
1251 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
1252 struct bfd_hash_table *table,
1255 /* Allocate the structure if it has not already been allocated by a
1259 entry = (struct bfd_hash_entry *)
1260 bfd_hash_allocate (table,
1261 sizeof (struct elf_x86_64_link_hash_entry));
1266 /* Call the allocation method of the superclass. */
1267 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1270 struct elf_x86_64_link_hash_entry *eh;
1272 eh = (struct elf_x86_64_link_hash_entry *) entry;
1273 eh->dyn_relocs = NULL;
1274 eh->tls_type = GOT_UNKNOWN;
1276 eh->has_got_reloc = 0;
1277 eh->has_non_got_reloc = 0;
1278 eh->no_finish_dynamic_symbol = 0;
1279 eh->tls_get_addr = 0;
1280 eh->func_pointer_refcount = 0;
1281 eh->plt_second.offset = (bfd_vma) -1;
1282 eh->plt_got.offset = (bfd_vma) -1;
1283 eh->tlsdesc_got = (bfd_vma) -1;
1289 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1290 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1291 as global symbol. We reuse indx and dynstr_index for local symbol
1292 hash since they aren't used by global symbols in this backend. */
1295 elf_x86_64_local_htab_hash (const void *ptr)
1297 struct elf_link_hash_entry *h
1298 = (struct elf_link_hash_entry *) ptr;
1299 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1302 /* Compare local hash entries. */
1305 elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
1307 struct elf_link_hash_entry *h1
1308 = (struct elf_link_hash_entry *) ptr1;
1309 struct elf_link_hash_entry *h2
1310 = (struct elf_link_hash_entry *) ptr2;
1312 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
1315 /* Find and/or create a hash entry for local symbol. */
1317 static struct elf_link_hash_entry *
1318 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
1319 bfd *abfd, const Elf_Internal_Rela *rel,
1322 struct elf_x86_64_link_hash_entry e, *ret;
1323 asection *sec = abfd->sections;
1324 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
1325 htab->r_sym (rel->r_info));
1328 e.elf.indx = sec->id;
1329 e.elf.dynstr_index = htab->r_sym (rel->r_info);
1330 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
1331 create ? INSERT : NO_INSERT);
1338 ret = (struct elf_x86_64_link_hash_entry *) *slot;
1342 ret = (struct elf_x86_64_link_hash_entry *)
1343 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
1344 sizeof (struct elf_x86_64_link_hash_entry));
1347 memset (ret, 0, sizeof (*ret));
1348 ret->elf.indx = sec->id;
1349 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
1350 ret->elf.dynindx = -1;
1351 ret->func_pointer_refcount = 0;
1352 ret->plt_got.offset = (bfd_vma) -1;
1358 /* Destroy an X86-64 ELF linker hash table. */
1361 elf_x86_64_link_hash_table_free (bfd *obfd)
1363 struct elf_x86_64_link_hash_table *htab
1364 = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
1366 if (htab->loc_hash_table)
1367 htab_delete (htab->loc_hash_table);
1368 if (htab->loc_hash_memory)
1369 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1370 _bfd_elf_link_hash_table_free (obfd);
1373 /* Create an X86-64 ELF linker hash table. */
1375 static struct bfd_link_hash_table *
1376 elf_x86_64_link_hash_table_create (bfd *abfd)
1378 struct elf_x86_64_link_hash_table *ret;
1379 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
1381 ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
1385 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1386 elf_x86_64_link_hash_newfunc,
1387 sizeof (struct elf_x86_64_link_hash_entry),
1394 if (ABI_64_P (abfd))
1396 ret->r_info = elf64_r_info;
1397 ret->r_sym = elf64_r_sym;
1398 ret->pointer_r_type = R_X86_64_64;
1399 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1400 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1404 ret->r_info = elf32_r_info;
1405 ret->r_sym = elf32_r_sym;
1406 ret->pointer_r_type = R_X86_64_32;
1407 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1408 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1411 ret->loc_hash_table = htab_try_create (1024,
1412 elf_x86_64_local_htab_hash,
1413 elf_x86_64_local_htab_eq,
1415 ret->loc_hash_memory = objalloc_create ();
1416 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1418 elf_x86_64_link_hash_table_free (abfd);
1421 ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
1423 return &ret->elf.root;
1426 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1429 elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1430 struct elf_link_hash_entry *dir,
1431 struct elf_link_hash_entry *ind)
1433 struct elf_x86_64_link_hash_entry *edir, *eind;
1435 edir = (struct elf_x86_64_link_hash_entry *) dir;
1436 eind = (struct elf_x86_64_link_hash_entry *) ind;
1438 edir->has_got_reloc |= eind->has_got_reloc;
1439 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1441 if (eind->dyn_relocs != NULL)
1443 if (edir->dyn_relocs != NULL)
1445 struct elf_dyn_relocs **pp;
1446 struct elf_dyn_relocs *p;
1448 /* Add reloc counts against the indirect sym to the direct sym
1449 list. Merge any entries against the same section. */
1450 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1452 struct elf_dyn_relocs *q;
1454 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1455 if (q->sec == p->sec)
1457 q->pc_count += p->pc_count;
1458 q->count += p->count;
1465 *pp = edir->dyn_relocs;
1468 edir->dyn_relocs = eind->dyn_relocs;
1469 eind->dyn_relocs = NULL;
1472 if (ind->root.type == bfd_link_hash_indirect
1473 && dir->got.refcount <= 0)
1475 edir->tls_type = eind->tls_type;
1476 eind->tls_type = GOT_UNKNOWN;
1479 if (ELIMINATE_COPY_RELOCS
1480 && ind->root.type != bfd_link_hash_indirect
1481 && dir->dynamic_adjusted)
1483 /* If called to transfer flags for a weakdef during processing
1484 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1485 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1486 if (dir->versioned != versioned_hidden)
1487 dir->ref_dynamic |= ind->ref_dynamic;
1488 dir->ref_regular |= ind->ref_regular;
1489 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1490 dir->needs_plt |= ind->needs_plt;
1491 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1495 if (eind->func_pointer_refcount > 0)
1497 edir->func_pointer_refcount += eind->func_pointer_refcount;
1498 eind->func_pointer_refcount = 0;
1501 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1506 elf64_x86_64_elf_object_p (bfd *abfd)
1508 /* Set the right machine number for an x86-64 elf64 file. */
1509 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
1514 elf32_x86_64_elf_object_p (bfd *abfd)
1516 /* Set the right machine number for an x86-64 elf32 file. */
1517 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1521 /* Return TRUE if the TLS access code sequence support transition
1525 elf_x86_64_check_tls_transition (bfd *abfd,
1526 struct bfd_link_info *info,
1529 Elf_Internal_Shdr *symtab_hdr,
1530 struct elf_link_hash_entry **sym_hashes,
1531 unsigned int r_type,
1532 const Elf_Internal_Rela *rel,
1533 const Elf_Internal_Rela *relend)
1536 unsigned long r_symndx;
1537 bfd_boolean largepic = FALSE;
1538 struct elf_link_hash_entry *h;
1540 struct elf_x86_64_link_hash_table *htab;
1542 bfd_boolean indirect_call;
1544 htab = elf_x86_64_hash_table (info);
1545 offset = rel->r_offset;
1548 case R_X86_64_TLSGD:
1549 case R_X86_64_TLSLD:
1550 if ((rel + 1) >= relend)
1553 if (r_type == R_X86_64_TLSGD)
1555 /* Check transition from GD access model. For 64bit, only
1556 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1557 .word 0x6666; rex64; call __tls_get_addr@PLT
1559 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1561 call *__tls_get_addr@GOTPCREL(%rip)
1562 which may be converted to
1563 addr32 call __tls_get_addr
1564 can transit to different access model. For 32bit, only
1565 leaq foo@tlsgd(%rip), %rdi
1566 .word 0x6666; rex64; call __tls_get_addr@PLT
1568 leaq foo@tlsgd(%rip), %rdi
1570 call *__tls_get_addr@GOTPCREL(%rip)
1571 which may be converted to
1572 addr32 call __tls_get_addr
1573 can transit to different access model. For largepic,
1575 leaq foo@tlsgd(%rip), %rdi
1576 movabsq $__tls_get_addr@pltoff, %rax
1580 leaq foo@tlsgd(%rip), %rdi
1581 movabsq $__tls_get_addr@pltoff, %rax
1585 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1587 if ((offset + 12) > sec->size)
1590 call = contents + offset + 4;
1592 || !((call[1] == 0x48
1600 && call[3] == 0xe8)))
1602 if (!ABI_64_P (abfd)
1603 || (offset + 19) > sec->size
1605 || memcmp (call - 7, leaq + 1, 3) != 0
1606 || memcmp (call, "\x48\xb8", 2) != 0
1610 || !((call[10] == 0x48 && call[12] == 0xd8)
1611 || (call[10] == 0x4c && call[12] == 0xf8)))
1615 else if (ABI_64_P (abfd))
1618 || memcmp (contents + offset - 4, leaq, 4) != 0)
1624 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
1627 indirect_call = call[2] == 0xff;
1631 /* Check transition from LD access model. Only
1632 leaq foo@tlsld(%rip), %rdi;
1633 call __tls_get_addr@PLT
1635 leaq foo@tlsld(%rip), %rdi;
1636 call *__tls_get_addr@GOTPCREL(%rip)
1637 which may be converted to
1638 addr32 call __tls_get_addr
1639 can transit to different access model. For largepic
1641 leaq foo@tlsld(%rip), %rdi
1642 movabsq $__tls_get_addr@pltoff, %rax
1646 leaq foo@tlsld(%rip), %rdi
1647 movabsq $__tls_get_addr@pltoff, %rax
1651 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
1653 if (offset < 3 || (offset + 9) > sec->size)
1656 if (memcmp (contents + offset - 3, lea, 3) != 0)
1659 call = contents + offset + 4;
1660 if (!(call[0] == 0xe8
1661 || (call[0] == 0xff && call[1] == 0x15)
1662 || (call[0] == 0x67 && call[1] == 0xe8)))
1664 if (!ABI_64_P (abfd)
1665 || (offset + 19) > sec->size
1666 || memcmp (call, "\x48\xb8", 2) != 0
1670 || !((call[10] == 0x48 && call[12] == 0xd8)
1671 || (call[10] == 0x4c && call[12] == 0xf8)))
1675 indirect_call = call[0] == 0xff;
1678 r_symndx = htab->r_sym (rel[1].r_info);
1679 if (r_symndx < symtab_hdr->sh_info)
1682 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1684 || !((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr)
1687 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64;
1688 else if (indirect_call)
1689 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX;
1691 return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1692 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
1694 case R_X86_64_GOTTPOFF:
1695 /* Check transition from IE access model:
1696 mov foo@gottpoff(%rip), %reg
1697 add foo@gottpoff(%rip), %reg
1700 /* Check REX prefix first. */
1701 if (offset >= 3 && (offset + 4) <= sec->size)
1703 val = bfd_get_8 (abfd, contents + offset - 3);
1704 if (val != 0x48 && val != 0x4c)
1706 /* X32 may have 0x44 REX prefix or no REX prefix. */
1707 if (ABI_64_P (abfd))
1713 /* X32 may not have any REX prefix. */
1714 if (ABI_64_P (abfd))
1716 if (offset < 2 || (offset + 3) > sec->size)
1720 val = bfd_get_8 (abfd, contents + offset - 2);
1721 if (val != 0x8b && val != 0x03)
1724 val = bfd_get_8 (abfd, contents + offset - 1);
1725 return (val & 0xc7) == 5;
1727 case R_X86_64_GOTPC32_TLSDESC:
1728 /* Check transition from GDesc access model:
1729 leaq x@tlsdesc(%rip), %rax
1731 Make sure it's a leaq adding rip to a 32-bit offset
1732 into any register, although it's probably almost always
1735 if (offset < 3 || (offset + 4) > sec->size)
1738 val = bfd_get_8 (abfd, contents + offset - 3);
1739 if ((val & 0xfb) != 0x48)
1742 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1745 val = bfd_get_8 (abfd, contents + offset - 1);
1746 return (val & 0xc7) == 0x05;
1748 case R_X86_64_TLSDESC_CALL:
1749 /* Check transition from GDesc access model:
1750 call *x@tlsdesc(%rax)
1752 if (offset + 2 <= sec->size)
1754 /* Make sure that it's a call *x@tlsdesc(%rax). */
1755 call = contents + offset;
1756 return call[0] == 0xff && call[1] == 0x10;
1766 /* Return TRUE if the TLS access transition is OK or no transition
1767 will be performed. Update R_TYPE if there is a transition. */
1770 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1771 asection *sec, bfd_byte *contents,
1772 Elf_Internal_Shdr *symtab_hdr,
1773 struct elf_link_hash_entry **sym_hashes,
1774 unsigned int *r_type, int tls_type,
1775 const Elf_Internal_Rela *rel,
1776 const Elf_Internal_Rela *relend,
1777 struct elf_link_hash_entry *h,
1778 unsigned long r_symndx,
1779 bfd_boolean from_relocate_section)
1781 unsigned int from_type = *r_type;
1782 unsigned int to_type = from_type;
1783 bfd_boolean check = TRUE;
1785 /* Skip TLS transition for functions. */
1787 && (h->type == STT_FUNC
1788 || h->type == STT_GNU_IFUNC))
1793 case R_X86_64_TLSGD:
1794 case R_X86_64_GOTPC32_TLSDESC:
1795 case R_X86_64_TLSDESC_CALL:
1796 case R_X86_64_GOTTPOFF:
1797 if (bfd_link_executable (info))
1800 to_type = R_X86_64_TPOFF32;
1802 to_type = R_X86_64_GOTTPOFF;
1805 /* When we are called from elf_x86_64_relocate_section, there may
1806 be additional transitions based on TLS_TYPE. */
1807 if (from_relocate_section)
1809 unsigned int new_to_type = to_type;
1811 if (bfd_link_executable (info)
1814 && tls_type == GOT_TLS_IE)
1815 new_to_type = R_X86_64_TPOFF32;
1817 if (to_type == R_X86_64_TLSGD
1818 || to_type == R_X86_64_GOTPC32_TLSDESC
1819 || to_type == R_X86_64_TLSDESC_CALL)
1821 if (tls_type == GOT_TLS_IE)
1822 new_to_type = R_X86_64_GOTTPOFF;
1825 /* We checked the transition before when we were called from
1826 elf_x86_64_check_relocs. We only want to check the new
1827 transition which hasn't been checked before. */
1828 check = new_to_type != to_type && from_type == to_type;
1829 to_type = new_to_type;
1834 case R_X86_64_TLSLD:
1835 if (bfd_link_executable (info))
1836 to_type = R_X86_64_TPOFF32;
1843 /* Return TRUE if there is no transition. */
1844 if (from_type == to_type)
1847 /* Check if the transition can be performed. */
1849 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1850 symtab_hdr, sym_hashes,
1851 from_type, rel, relend))
1853 reloc_howto_type *from, *to;
1856 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1857 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1860 name = h->root.root.string;
1863 struct elf_x86_64_link_hash_table *htab;
1865 htab = elf_x86_64_hash_table (info);
1870 Elf_Internal_Sym *isym;
1872 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1874 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1879 /* xgettext:c-format */
1880 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1881 "in section `%A' failed"),
1882 abfd, from->name, to->name, name, rel->r_offset, sec);
1883 bfd_set_error (bfd_error_bad_value);
1891 /* Rename some of the generic section flags to better document how they
1893 #define need_convert_load sec_flg0
1894 #define check_relocs_failed sec_flg1
1897 elf_x86_64_need_pic (struct bfd_link_info *info,
1898 bfd *input_bfd, asection *sec,
1899 struct elf_link_hash_entry *h,
1900 Elf_Internal_Shdr *symtab_hdr,
1901 Elf_Internal_Sym *isym,
1902 reloc_howto_type *howto)
1905 const char *und = "";
1906 const char *pic = "";
1912 name = h->root.root.string;
1913 switch (ELF_ST_VISIBILITY (h->other))
1916 v = _("hidden symbol ");
1919 v = _("internal symbol ");
1922 v = _("protected symbol ");
1925 if (((struct elf_x86_64_link_hash_entry *) h)->def_protected)
1926 v = _("protected symbol ");
1929 pic = _("; recompile with -fPIC");
1933 if (!h->def_regular && !h->def_dynamic)
1934 und = _("undefined ");
1938 name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL);
1939 pic = _("; recompile with -fPIC");
1942 if (bfd_link_dll (info))
1943 object = _("a shared object");
1944 else if (bfd_link_pie (info))
1945 object = _("a PIE object");
1947 object = _("a PDE object");
1949 /* xgettext:c-format */
1950 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1951 "not be used when making %s%s"),
1952 input_bfd, howto->name, und, v, name,
1954 bfd_set_error (bfd_error_bad_value);
1955 sec->check_relocs_failed = 1;
1959 /* With the local symbol, foo, we convert
1960 mov foo@GOTPCREL(%rip), %reg
1964 call/jmp *foo@GOTPCREL(%rip)
1966 nop call foo/jmp foo nop
1967 When PIC is false, convert
1968 test %reg, foo@GOTPCREL(%rip)
1972 binop foo@GOTPCREL(%rip), %reg
1975 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1979 elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec,
1981 Elf_Internal_Rela *irel,
1982 struct elf_link_hash_entry *h,
1983 bfd_boolean *converted,
1984 struct bfd_link_info *link_info)
1986 struct elf_x86_64_link_hash_table *htab;
1988 bfd_boolean require_reloc_pc32;
1990 bfd_boolean to_reloc_pc32;
1993 bfd_signed_vma raddend;
1994 unsigned int opcode;
1996 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
1997 unsigned int r_symndx;
1999 bfd_vma roff = irel->r_offset;
2001 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
2004 raddend = irel->r_addend;
2005 /* Addend for 32-bit PC-relative relocation must be -4. */
2009 htab = elf_x86_64_hash_table (link_info);
2010 is_pic = bfd_link_pic (link_info);
2012 relocx = (r_type == R_X86_64_GOTPCRELX
2013 || r_type == R_X86_64_REX_GOTPCRELX);
2015 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
2018 = link_info->disable_target_specific_optimizations > 1;
2020 r_symndx = htab->r_sym (irel->r_info);
2022 opcode = bfd_get_8 (abfd, contents + roff - 2);
2024 /* Convert mov to lea since it has been done for a while. */
2027 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
2028 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
2029 test, xor instructions. */
2034 /* We convert only to R_X86_64_PC32:
2036 2. R_X86_64_GOTPCREL since we can't modify REX byte.
2037 3. require_reloc_pc32 is true.
2040 to_reloc_pc32 = (opcode == 0xff
2042 || require_reloc_pc32
2045 /* Get the symbol referred to by the reloc. */
2048 Elf_Internal_Sym *isym
2049 = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx);
2051 /* Skip relocation against undefined symbols. */
2052 if (isym->st_shndx == SHN_UNDEF)
2055 symtype = ELF_ST_TYPE (isym->st_info);
2057 if (isym->st_shndx == SHN_ABS)
2058 tsec = bfd_abs_section_ptr;
2059 else if (isym->st_shndx == SHN_COMMON)
2060 tsec = bfd_com_section_ptr;
2061 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
2062 tsec = &_bfd_elf_large_com_section;
2064 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2066 toff = isym->st_value;
2070 /* Undefined weak symbol is only bound locally in executable
2071 and its reference is resolved as 0 without relocation
2072 overflow. We can only perform this optimization for
2073 GOTPCRELX relocations since we need to modify REX byte.
2074 It is OK convert mov with R_X86_64_GOTPCREL to
2076 if ((relocx || opcode == 0x8b)
2077 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
2079 elf_x86_64_hash_entry (h)))
2083 /* Skip for branch instructions since R_X86_64_PC32
2085 if (require_reloc_pc32)
2090 /* For non-branch instructions, we can convert to
2091 R_X86_64_32/R_X86_64_32S since we know if there
2093 to_reloc_pc32 = FALSE;
2096 /* Since we don't know the current PC when PIC is true,
2097 we can't convert to R_X86_64_PC32. */
2098 if (to_reloc_pc32 && is_pic)
2103 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
2104 ld.so may use its link-time address. */
2105 else if (h->start_stop
2107 || h->root.type == bfd_link_hash_defined
2108 || h->root.type == bfd_link_hash_defweak)
2109 && h != htab->elf.hdynamic
2110 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
2112 /* bfd_link_hash_new or bfd_link_hash_undefined is
2113 set by an assignment in a linker script in
2114 bfd_elf_record_link_assignment. start_stop is set
2115 on __start_SECNAME/__stop_SECNAME which mark section
2119 && (h->root.type == bfd_link_hash_new
2120 || h->root.type == bfd_link_hash_undefined
2121 || ((h->root.type == bfd_link_hash_defined
2122 || h->root.type == bfd_link_hash_defweak)
2123 && h->root.u.def.section == bfd_und_section_ptr))))
2125 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
2126 if (require_reloc_pc32)
2130 tsec = h->root.u.def.section;
2131 toff = h->root.u.def.value;
2138 /* Don't convert GOTPCREL relocation against large section. */
2139 if (elf_section_data (tsec) != NULL
2140 && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0)
2143 /* We can only estimate relocation overflow for R_X86_64_PC32. */
2147 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
2149 /* At this stage in linking, no SEC_MERGE symbol has been
2150 adjusted, so all references to such symbols need to be
2151 passed through _bfd_merged_section_offset. (Later, in
2152 relocate_section, all SEC_MERGE symbols *except* for
2153 section symbols have been adjusted.)
2155 gas may reduce relocations against symbols in SEC_MERGE
2156 sections to a relocation against the section symbol when
2157 the original addend was zero. When the reloc is against
2158 a section symbol we should include the addend in the
2159 offset passed to _bfd_merged_section_offset, since the
2160 location of interest is the original symbol. On the
2161 other hand, an access to "sym+addend" where "sym" is not
2162 a section symbol should not include the addend; Such an
2163 access is presumed to be an offset from "sym"; The
2164 location of interest is just "sym". */
2165 if (symtype == STT_SECTION)
2168 toff = _bfd_merged_section_offset (abfd, &tsec,
2169 elf_section_data (tsec)->sec_info,
2172 if (symtype != STT_SECTION)
2178 /* Don't convert if R_X86_64_PC32 relocation overflows. */
2179 if (tsec->output_section == sec->output_section)
2181 if ((toff - roff + 0x80000000) > 0xffffffff)
2186 bfd_signed_vma distance;
2188 /* At this point, we don't know the load addresses of TSEC
2189 section nor SEC section. We estimate the distrance between
2190 SEC and TSEC. We store the estimated distances in the
2191 compressed_size field of the output section, which is only
2192 used to decompress the compressed input section. */
2193 if (sec->output_section->compressed_size == 0)
2196 bfd_size_type size = 0;
2197 for (asect = link_info->output_bfd->sections;
2199 asect = asect->next)
2200 /* Skip debug sections since compressed_size is used to
2201 compress debug sections. */
2202 if ((asect->flags & SEC_DEBUGGING) == 0)
2205 for (i = asect->map_head.s;
2209 size = align_power (size, i->alignment_power);
2212 asect->compressed_size = size;
2216 /* Don't convert GOTPCREL relocations if TSEC isn't placed
2218 distance = (tsec->output_section->compressed_size
2219 - sec->output_section->compressed_size);
2223 /* Take PT_GNU_RELRO segment into account by adding
2225 if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize
2226 - roff + 0x80000000) > 0xffffffff)
2233 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
2238 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
2240 modrm = bfd_get_8 (abfd, contents + roff - 1);
2243 /* Convert to "jmp foo nop". */
2246 nop_offset = irel->r_offset + 3;
2247 disp = bfd_get_32 (abfd, contents + irel->r_offset);
2248 irel->r_offset -= 1;
2249 bfd_put_32 (abfd, disp, contents + irel->r_offset);
2253 struct elf_x86_64_link_hash_entry *eh
2254 = (struct elf_x86_64_link_hash_entry *) h;
2256 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
2259 /* To support TLS optimization, always use addr32 prefix for
2260 "call *__tls_get_addr@GOTPCREL(%rip)". */
2261 if (eh && eh->tls_get_addr)
2264 nop_offset = irel->r_offset - 2;
2268 nop = link_info->call_nop_byte;
2269 if (link_info->call_nop_as_suffix)
2271 nop_offset = irel->r_offset + 3;
2272 disp = bfd_get_32 (abfd, contents + irel->r_offset);
2273 irel->r_offset -= 1;
2274 bfd_put_32 (abfd, disp, contents + irel->r_offset);
2277 nop_offset = irel->r_offset - 2;
2280 bfd_put_8 (abfd, nop, contents + nop_offset);
2281 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
2282 r_type = R_X86_64_PC32;
2287 unsigned int rex_mask = REX_R;
2289 if (r_type == R_X86_64_REX_GOTPCRELX)
2290 rex = bfd_get_8 (abfd, contents + roff - 3);
2298 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2299 "lea foo(%rip), %reg". */
2301 r_type = R_X86_64_PC32;
2305 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2306 "mov $foo, %reg". */
2308 modrm = bfd_get_8 (abfd, contents + roff - 1);
2309 modrm = 0xc0 | (modrm & 0x38) >> 3;
2310 if ((rex & REX_W) != 0
2311 && ABI_64_P (link_info->output_bfd))
2313 /* Keep the REX_W bit in REX byte for LP64. */
2314 r_type = R_X86_64_32S;
2315 goto rewrite_modrm_rex;
2319 /* If the REX_W bit in REX byte isn't needed,
2320 use R_X86_64_32 and clear the W bit to avoid
2321 sign-extend imm32 to imm64. */
2322 r_type = R_X86_64_32;
2323 /* Clear the W bit in REX byte. */
2325 goto rewrite_modrm_rex;
2331 /* R_X86_64_PC32 isn't supported. */
2335 modrm = bfd_get_8 (abfd, contents + roff - 1);
2338 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
2339 "test $foo, %reg". */
2340 modrm = 0xc0 | (modrm & 0x38) >> 3;
2345 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
2346 "binop $foo, %reg". */
2347 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
2351 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
2352 overflow when sign-extending imm32 to imm64. */
2353 r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32;
2356 bfd_put_8 (abfd, modrm, contents + roff - 1);
2360 /* Move the R bit to the B bit in REX byte. */
2361 rex = (rex & ~rex_mask) | (rex & REX_R) >> 2;
2362 bfd_put_8 (abfd, rex, contents + roff - 3);
2365 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
2369 bfd_put_8 (abfd, opcode, contents + roff - 2);
2372 irel->r_info = htab->r_info (r_symndx, r_type);
2379 /* Look through the relocs for a section during the first phase, and
2380 calculate needed space in the global offset table, procedure
2381 linkage table, and dynamic reloc sections. */
2384 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
2386 const Elf_Internal_Rela *relocs)
2388 struct elf_x86_64_link_hash_table *htab;
2389 Elf_Internal_Shdr *symtab_hdr;
2390 struct elf_link_hash_entry **sym_hashes;
2391 const Elf_Internal_Rela *rel;
2392 const Elf_Internal_Rela *rel_end;
2396 if (bfd_link_relocatable (info))
2399 /* Don't do anything special with non-loaded, non-alloced sections.
2400 In particular, any relocs in such sections should not affect GOT
2401 and PLT reference counting (ie. we don't allow them to create GOT
2402 or PLT entries), there's no possibility or desire to optimize TLS
2403 relocs, and there's not much point in propagating relocs to shared
2404 libs that the dynamic linker won't relocate. */
2405 if ((sec->flags & SEC_ALLOC) == 0)
2408 BFD_ASSERT (is_x86_64_elf (abfd));
2410 htab = elf_x86_64_hash_table (info);
2413 sec->check_relocs_failed = 1;
2417 /* Get the section contents. */
2418 if (elf_section_data (sec)->this_hdr.contents != NULL)
2419 contents = elf_section_data (sec)->this_hdr.contents;
2420 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2422 sec->check_relocs_failed = 1;
2426 symtab_hdr = &elf_symtab_hdr (abfd);
2427 sym_hashes = elf_sym_hashes (abfd);
2431 rel_end = relocs + sec->reloc_count;
2432 for (rel = relocs; rel < rel_end; rel++)
2434 unsigned int r_type;
2435 unsigned int r_symndx;
2436 struct elf_link_hash_entry *h;
2437 struct elf_x86_64_link_hash_entry *eh;
2438 Elf_Internal_Sym *isym;
2440 bfd_boolean size_reloc;
2442 r_symndx = htab->r_sym (rel->r_info);
2443 r_type = ELF32_R_TYPE (rel->r_info);
2445 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
2447 /* xgettext:c-format */
2448 _bfd_error_handler (_("%B: bad symbol index: %d"),
2453 if (r_symndx < symtab_hdr->sh_info)
2455 /* A local symbol. */
2456 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2461 /* Check relocation against local STT_GNU_IFUNC symbol. */
2462 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2464 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
2469 /* Fake a STT_GNU_IFUNC symbol. */
2470 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
2472 h->type = STT_GNU_IFUNC;
2475 h->forced_local = 1;
2476 h->root.type = bfd_link_hash_defined;
2484 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2485 while (h->root.type == bfd_link_hash_indirect
2486 || h->root.type == bfd_link_hash_warning)
2487 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2490 /* Check invalid x32 relocations. */
2491 if (!ABI_64_P (abfd))
2497 case R_X86_64_DTPOFF64:
2498 case R_X86_64_TPOFF64:
2500 case R_X86_64_GOTOFF64:
2501 case R_X86_64_GOT64:
2502 case R_X86_64_GOTPCREL64:
2503 case R_X86_64_GOTPC64:
2504 case R_X86_64_GOTPLT64:
2505 case R_X86_64_PLTOFF64:
2508 name = h->root.root.string;
2510 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2513 /* xgettext:c-format */
2514 (_("%B: relocation %s against symbol `%s' isn't "
2515 "supported in x32 mode"), abfd,
2516 x86_64_elf_howto_table[r_type].name, name);
2517 bfd_set_error (bfd_error_bad_value);
2525 /* It is referenced by a non-shared object. */
2527 h->root.non_ir_ref_regular = 1;
2529 if (h->type == STT_GNU_IFUNC)
2530 elf_tdata (info->output_bfd)->has_gnu_symbols
2531 |= elf_gnu_symbol_ifunc;
2534 if (! elf_x86_64_tls_transition (info, abfd, sec, contents,
2535 symtab_hdr, sym_hashes,
2536 &r_type, GOT_UNKNOWN,
2537 rel, rel_end, h, r_symndx, FALSE))
2540 eh = (struct elf_x86_64_link_hash_entry *) h;
2543 case R_X86_64_TLSLD:
2544 htab->tls_ld_got.refcount += 1;
2547 case R_X86_64_TPOFF32:
2548 if (!bfd_link_executable (info) && ABI_64_P (abfd))
2549 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2550 &x86_64_elf_howto_table[r_type]);
2552 eh->has_got_reloc = 1;
2555 case R_X86_64_GOTTPOFF:
2556 if (!bfd_link_executable (info))
2557 info->flags |= DF_STATIC_TLS;
2560 case R_X86_64_GOT32:
2561 case R_X86_64_GOTPCREL:
2562 case R_X86_64_GOTPCRELX:
2563 case R_X86_64_REX_GOTPCRELX:
2564 case R_X86_64_TLSGD:
2565 case R_X86_64_GOT64:
2566 case R_X86_64_GOTPCREL64:
2567 case R_X86_64_GOTPLT64:
2568 case R_X86_64_GOTPC32_TLSDESC:
2569 case R_X86_64_TLSDESC_CALL:
2570 /* This symbol requires a global offset table entry. */
2572 int tls_type, old_tls_type;
2576 default: tls_type = GOT_NORMAL; break;
2577 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
2578 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
2579 case R_X86_64_GOTPC32_TLSDESC:
2580 case R_X86_64_TLSDESC_CALL:
2581 tls_type = GOT_TLS_GDESC; break;
2586 h->got.refcount += 1;
2587 old_tls_type = eh->tls_type;
2591 bfd_signed_vma *local_got_refcounts;
2593 /* This is a global offset table entry for a local symbol. */
2594 local_got_refcounts = elf_local_got_refcounts (abfd);
2595 if (local_got_refcounts == NULL)
2599 size = symtab_hdr->sh_info;
2600 size *= sizeof (bfd_signed_vma)
2601 + sizeof (bfd_vma) + sizeof (char);
2602 local_got_refcounts = ((bfd_signed_vma *)
2603 bfd_zalloc (abfd, size));
2604 if (local_got_refcounts == NULL)
2606 elf_local_got_refcounts (abfd) = local_got_refcounts;
2607 elf_x86_64_local_tlsdesc_gotent (abfd)
2608 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2609 elf_x86_64_local_got_tls_type (abfd)
2610 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2612 local_got_refcounts[r_symndx] += 1;
2614 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
2617 /* If a TLS symbol is accessed using IE at least once,
2618 there is no point to use dynamic model for it. */
2619 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2620 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2621 || tls_type != GOT_TLS_IE))
2623 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
2624 tls_type = old_tls_type;
2625 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2626 && GOT_TLS_GD_ANY_P (tls_type))
2627 tls_type |= old_tls_type;
2631 name = h->root.root.string;
2633 name = bfd_elf_sym_name (abfd, symtab_hdr,
2636 /* xgettext:c-format */
2637 (_("%B: '%s' accessed both as normal and"
2638 " thread local symbol"),
2640 bfd_set_error (bfd_error_bad_value);
2645 if (old_tls_type != tls_type)
2648 eh->tls_type = tls_type;
2650 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
2655 case R_X86_64_GOTOFF64:
2656 case R_X86_64_GOTPC32:
2657 case R_X86_64_GOTPC64:
2660 eh->has_got_reloc = 1;
2663 case R_X86_64_PLT32:
2664 case R_X86_64_PLT32_BND:
2665 /* This symbol requires a procedure linkage table entry. We
2666 actually build the entry in adjust_dynamic_symbol,
2667 because this might be a case of linking PIC code which is
2668 never referenced by a dynamic object, in which case we
2669 don't need to generate a procedure linkage table entry
2672 /* If this is a local symbol, we resolve it directly without
2673 creating a procedure linkage table entry. */
2677 eh->has_got_reloc = 1;
2679 h->plt.refcount += 1;
2682 case R_X86_64_PLTOFF64:
2683 /* This tries to form the 'address' of a function relative
2684 to GOT. For global symbols we need a PLT entry. */
2688 h->plt.refcount += 1;
2692 case R_X86_64_SIZE32:
2693 case R_X86_64_SIZE64:
2698 if (!ABI_64_P (abfd))
2704 /* Check relocation overflow as these relocs may lead to
2705 run-time relocation overflow. Don't error out for
2706 sections we don't care about, such as debug sections or
2707 when relocation overflow check is disabled. */
2708 if (!info->no_reloc_overflow_check
2709 && (bfd_link_pic (info)
2710 || (bfd_link_executable (info)
2714 && (sec->flags & SEC_READONLY) == 0)))
2715 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2716 &x86_64_elf_howto_table[r_type]);
2722 case R_X86_64_PC32_BND:
2726 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2727 eh->has_non_got_reloc = 1;
2728 /* We are called after all symbols have been resolved. Only
2729 relocation against STT_GNU_IFUNC symbol must go through
2732 && (bfd_link_executable (info)
2733 || h->type == STT_GNU_IFUNC))
2735 /* If this reloc is in a read-only section, we might
2736 need a copy reloc. We can't check reliably at this
2737 stage whether the section is read-only, as input
2738 sections have not yet been mapped to output sections.
2739 Tentatively set the flag for now, and correct in
2740 adjust_dynamic_symbol. */
2743 /* We may need a .plt entry if the symbol is a function
2744 defined in a shared lib or is a STT_GNU_IFUNC function
2745 referenced from the code or read-only section. */
2747 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2748 h->plt.refcount += 1;
2750 if (r_type == R_X86_64_PC32)
2752 /* Since something like ".long foo - ." may be used
2753 as pointer, make sure that PLT is used if foo is
2754 a function defined in a shared library. */
2755 if ((sec->flags & SEC_CODE) == 0)
2756 h->pointer_equality_needed = 1;
2758 else if (r_type != R_X86_64_PC32_BND
2759 && r_type != R_X86_64_PC64)
2761 h->pointer_equality_needed = 1;
2762 /* At run-time, R_X86_64_64 can be resolved for both
2763 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2764 can only be resolved for x32. */
2765 if ((sec->flags & SEC_READONLY) == 0
2766 && (r_type == R_X86_64_64
2767 || (!ABI_64_P (abfd)
2768 && (r_type == R_X86_64_32
2769 || r_type == R_X86_64_32S))))
2770 eh->func_pointer_refcount += 1;
2776 /* If we are creating a shared library, and this is a reloc
2777 against a global symbol, or a non PC relative reloc
2778 against a local symbol, then we need to copy the reloc
2779 into the shared library. However, if we are linking with
2780 -Bsymbolic, we do not need to copy a reloc against a
2781 global symbol which is defined in an object we are
2782 including in the link (i.e., DEF_REGULAR is set). At
2783 this point we have not seen all the input files, so it is
2784 possible that DEF_REGULAR is not set now but will be set
2785 later (it is never cleared). In case of a weak definition,
2786 DEF_REGULAR may be cleared later by a strong definition in
2787 a shared library. We account for that possibility below by
2788 storing information in the relocs_copied field of the hash
2789 table entry. A similar situation occurs when creating
2790 shared libraries and symbol visibility changes render the
2793 If on the other hand, we are creating an executable, we
2794 may need to keep relocations for symbols satisfied by a
2795 dynamic library if we manage to avoid copy relocs for the
2798 Generate dynamic pointer relocation against STT_GNU_IFUNC
2799 symbol in the non-code section. */
2800 if ((bfd_link_pic (info)
2801 && (! IS_X86_64_PCREL_TYPE (r_type)
2803 && (! (bfd_link_pie (info)
2804 || SYMBOLIC_BIND (info, h))
2805 || h->root.type == bfd_link_hash_defweak
2806 || !h->def_regular))))
2808 && h->type == STT_GNU_IFUNC
2809 && r_type == htab->pointer_r_type
2810 && (sec->flags & SEC_CODE) == 0)
2811 || (ELIMINATE_COPY_RELOCS
2812 && !bfd_link_pic (info)
2814 && (h->root.type == bfd_link_hash_defweak
2815 || !h->def_regular)))
2817 struct elf_dyn_relocs *p;
2818 struct elf_dyn_relocs **head;
2820 /* We must copy these reloc types into the output file.
2821 Create a reloc section in dynobj and make room for
2825 sreloc = _bfd_elf_make_dynamic_reloc_section
2826 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2827 abfd, /*rela?*/ TRUE);
2833 /* If this is a global symbol, we count the number of
2834 relocations we need for this symbol. */
2836 head = &eh->dyn_relocs;
2839 /* Track dynamic relocs needed for local syms too.
2840 We really need local syms available to do this
2845 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2850 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2854 /* Beware of type punned pointers vs strict aliasing
2856 vpp = &(elf_section_data (s)->local_dynrel);
2857 head = (struct elf_dyn_relocs **)vpp;
2861 if (p == NULL || p->sec != sec)
2863 bfd_size_type amt = sizeof *p;
2865 p = ((struct elf_dyn_relocs *)
2866 bfd_alloc (htab->elf.dynobj, amt));
2877 /* Count size relocation as PC-relative relocation. */
2878 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
2883 /* This relocation describes the C++ object vtable hierarchy.
2884 Reconstruct it for later use during GC. */
2885 case R_X86_64_GNU_VTINHERIT:
2886 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2890 /* This relocation describes which C++ vtable entries are actually
2891 used. Record for later use during GC. */
2892 case R_X86_64_GNU_VTENTRY:
2893 BFD_ASSERT (h != NULL);
2895 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2903 if ((r_type == R_X86_64_GOTPCREL
2904 || r_type == R_X86_64_GOTPCRELX
2905 || r_type == R_X86_64_REX_GOTPCRELX)
2906 && (h == NULL || h->type != STT_GNU_IFUNC))
2907 sec->need_convert_load = 1;
2910 if (elf_section_data (sec)->this_hdr.contents != contents)
2912 if (!info->keep_memory)
2916 /* Cache the section contents for elf_link_input_bfd. */
2917 elf_section_data (sec)->this_hdr.contents = contents;
2924 if (elf_section_data (sec)->this_hdr.contents != contents)
2926 sec->check_relocs_failed = 1;
2930 /* Return the section that should be marked against GC for a given
2934 elf_x86_64_gc_mark_hook (asection *sec,
2935 struct bfd_link_info *info,
2936 Elf_Internal_Rela *rel,
2937 struct elf_link_hash_entry *h,
2938 Elf_Internal_Sym *sym)
2941 switch (ELF32_R_TYPE (rel->r_info))
2943 case R_X86_64_GNU_VTINHERIT:
2944 case R_X86_64_GNU_VTENTRY:
2948 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2951 /* Remove undefined weak symbol from the dynamic symbol table if it
2952 is resolved to 0. */
2955 elf_x86_64_fixup_symbol (struct bfd_link_info *info,
2956 struct elf_link_hash_entry *h)
2958 if (h->dynindx != -1
2959 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2960 elf_x86_64_hash_entry (h)->has_got_reloc,
2961 elf_x86_64_hash_entry (h)))
2964 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2970 /* Adjust a symbol defined by a dynamic object and referenced by a
2971 regular object. The current definition is in some section of the
2972 dynamic object, but we're not including those sections. We have to
2973 change the definition to something the rest of the link can
2977 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2978 struct elf_link_hash_entry *h)
2980 struct elf_x86_64_link_hash_table *htab;
2982 struct elf_x86_64_link_hash_entry *eh;
2983 struct elf_dyn_relocs *p;
2985 /* STT_GNU_IFUNC symbol must go through PLT. */
2986 if (h->type == STT_GNU_IFUNC)
2988 /* All local STT_GNU_IFUNC references must be treate as local
2989 calls via local PLT. */
2991 && SYMBOL_CALLS_LOCAL (info, h))
2993 bfd_size_type pc_count = 0, count = 0;
2994 struct elf_dyn_relocs **pp;
2996 eh = (struct elf_x86_64_link_hash_entry *) h;
2997 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2999 pc_count += p->pc_count;
3000 p->count -= p->pc_count;
3009 if (pc_count || count)
3014 /* Increment PLT reference count only for PC-relative
3017 if (h->plt.refcount <= 0)
3018 h->plt.refcount = 1;
3020 h->plt.refcount += 1;
3025 if (h->plt.refcount <= 0)
3027 h->plt.offset = (bfd_vma) -1;
3033 /* If this is a function, put it in the procedure linkage table. We
3034 will fill in the contents of the procedure linkage table later,
3035 when we know the address of the .got section. */
3036 if (h->type == STT_FUNC
3039 if (h->plt.refcount <= 0
3040 || SYMBOL_CALLS_LOCAL (info, h)
3041 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3042 && h->root.type == bfd_link_hash_undefweak))
3044 /* This case can occur if we saw a PLT32 reloc in an input
3045 file, but the symbol was never referred to by a dynamic
3046 object, or if all references were garbage collected. In
3047 such a case, we don't actually need to build a procedure
3048 linkage table, and we can just do a PC32 reloc instead. */
3049 h->plt.offset = (bfd_vma) -1;
3056 /* It's possible that we incorrectly decided a .plt reloc was
3057 needed for an R_X86_64_PC32 reloc to a non-function sym in
3058 check_relocs. We can't decide accurately between function and
3059 non-function syms in check-relocs; Objects loaded later in
3060 the link may change h->type. So fix it now. */
3061 h->plt.offset = (bfd_vma) -1;
3063 eh = (struct elf_x86_64_link_hash_entry *) h;
3065 /* If this is a weak symbol, and there is a real definition, the
3066 processor independent code will have arranged for us to see the
3067 real definition first, and we can just use the same value. */
3068 if (h->u.weakdef != NULL)
3070 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3071 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3072 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3073 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3074 if (ELIMINATE_COPY_RELOCS
3075 || info->nocopyreloc
3076 || SYMBOL_NO_COPYRELOC (info, eh))
3078 h->non_got_ref = h->u.weakdef->non_got_ref;
3079 eh->needs_copy = h->u.weakdef->needs_copy;
3084 /* This is a reference to a symbol defined by a dynamic object which
3085 is not a function. */
3087 /* If we are creating a shared library, we must presume that the
3088 only references to the symbol are via the global offset table.
3089 For such cases we need not do anything here; the relocations will
3090 be handled correctly by relocate_section. */
3091 if (!bfd_link_executable (info))
3094 /* If there are no references to this symbol that do not use the
3095 GOT, we don't need to generate a copy reloc. */
3096 if (!h->non_got_ref)
3099 /* If -z nocopyreloc was given, we won't generate them either. */
3100 if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh))
3106 if (ELIMINATE_COPY_RELOCS)
3108 eh = (struct elf_x86_64_link_hash_entry *) h;
3109 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3111 s = p->sec->output_section;
3112 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3116 /* If we didn't find any dynamic relocs in read-only sections, then
3117 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3125 /* We must allocate the symbol in our .dynbss section, which will
3126 become part of the .bss section of the executable. There will be
3127 an entry for this symbol in the .dynsym section. The dynamic
3128 object will contain position independent code, so all references
3129 from the dynamic object to this symbol will go through the global
3130 offset table. The dynamic linker will use the .dynsym entry to
3131 determine the address it must put in the global offset table, so
3132 both the dynamic object and the regular object will refer to the
3133 same memory location for the variable. */
3135 htab = elf_x86_64_hash_table (info);
3139 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
3140 to copy the initial value out of the dynamic object and into the
3141 runtime process image. */
3142 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
3144 s = htab->elf.sdynrelro;
3145 srel = htab->elf.sreldynrelro;
3149 s = htab->elf.sdynbss;
3150 srel = htab->elf.srelbss;
3152 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3154 const struct elf_backend_data *bed;
3155 bed = get_elf_backend_data (info->output_bfd);
3156 srel->size += bed->s->sizeof_rela;
3160 return _bfd_elf_adjust_dynamic_copy (info, h, s);
3163 /* Allocate space in .plt, .got and associated reloc sections for
3167 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
3169 struct bfd_link_info *info;
3170 struct elf_x86_64_link_hash_table *htab;
3171 struct elf_x86_64_link_hash_entry *eh;
3172 struct elf_dyn_relocs *p;
3173 const struct elf_backend_data *bed;
3174 unsigned int plt_entry_size;
3175 bfd_boolean resolved_to_zero;
3177 if (h->root.type == bfd_link_hash_indirect)
3180 eh = (struct elf_x86_64_link_hash_entry *) h;
3182 info = (struct bfd_link_info *) inf;
3183 htab = elf_x86_64_hash_table (info);
3186 bed = get_elf_backend_data (info->output_bfd);
3187 plt_entry_size = htab->plt.plt_entry_size;
3189 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
3193 /* We can't use the GOT PLT if pointer equality is needed since
3194 finish_dynamic_symbol won't clear symbol value and the dynamic
3195 linker won't update the GOT slot. We will get into an infinite
3196 loop at run-time. */
3197 if (htab->plt_got != NULL
3198 && h->type != STT_GNU_IFUNC
3199 && !h->pointer_equality_needed
3200 && h->plt.refcount > 0
3201 && h->got.refcount > 0)
3203 /* Don't use the regular PLT if there are both GOT and GOTPLT
3205 h->plt.offset = (bfd_vma) -1;
3207 /* Use the GOT PLT. */
3208 eh->plt_got.refcount = 1;
3211 /* Clear the reference count of function pointer relocations if
3212 symbol isn't a normal function. */
3213 if (h->type != STT_FUNC)
3214 eh->func_pointer_refcount = 0;
3216 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
3217 here if it is defined and referenced in a non-shared object. */
3218 if (h->type == STT_GNU_IFUNC
3221 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
3223 &htab->readonly_dynrelocs_against_ifunc,
3227 GOT_ENTRY_SIZE, TRUE))
3229 asection *s = htab->plt_second;
3230 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
3232 /* Use the second PLT section if it is created. */
3233 eh->plt_second.offset = s->size;
3235 /* Make room for this entry in the second PLT section. */
3236 s->size += htab->non_lazy_plt->plt_entry_size;
3244 /* Don't create the PLT entry if there are only function pointer
3245 relocations which can be resolved at run-time. */
3246 else if (htab->elf.dynamic_sections_created
3247 && (h->plt.refcount > eh->func_pointer_refcount
3248 || eh->plt_got.refcount > 0))
3250 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
3252 /* Clear the reference count of function pointer relocations
3254 eh->func_pointer_refcount = 0;
3256 /* Make sure this symbol is output as a dynamic symbol.
3257 Undefined weak syms won't yet be marked as dynamic. */
3258 if (h->dynindx == -1
3260 && !resolved_to_zero
3261 && h->root.type == bfd_link_hash_undefweak)
3263 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3267 if (bfd_link_pic (info)
3268 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3270 asection *s = htab->elf.splt;
3271 asection *second_s = htab->plt_second;
3272 asection *got_s = htab->plt_got;
3274 /* If this is the first .plt entry, make room for the special
3275 first entry. The .plt section is used by prelink to undo
3276 prelinking for dynamic relocations. */
3278 s->size = htab->plt.has_plt0 * plt_entry_size;
3281 eh->plt_got.offset = got_s->size;
3284 h->plt.offset = s->size;
3286 eh->plt_second.offset = second_s->size;
3289 /* If this symbol is not defined in a regular file, and we are
3290 not generating a shared library, then set the symbol to this
3291 location in the .plt. This is required to make function
3292 pointers compare as equal between the normal executable and
3293 the shared library. */
3294 if (! bfd_link_pic (info)
3299 /* We need to make a call to the entry of the GOT PLT
3300 instead of regular PLT entry. */
3301 h->root.u.def.section = got_s;
3302 h->root.u.def.value = eh->plt_got.offset;
3308 /* We need to make a call to the entry of the
3309 second PLT instead of regular PLT entry. */
3310 h->root.u.def.section = second_s;
3311 h->root.u.def.value = eh->plt_second.offset;
3315 h->root.u.def.section = s;
3316 h->root.u.def.value = h->plt.offset;
3321 /* Make room for this entry. */
3323 got_s->size += htab->non_lazy_plt->plt_entry_size;
3326 s->size += plt_entry_size;
3328 second_s->size += htab->non_lazy_plt->plt_entry_size;
3330 /* We also need to make an entry in the .got.plt section,
3331 which will be placed in the .got section by the linker
3333 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
3335 /* There should be no PLT relocation against resolved
3336 undefined weak symbol in executable. */
3337 if (!resolved_to_zero)
3339 /* We also need to make an entry in the .rela.plt
3341 htab->elf.srelplt->size += bed->s->sizeof_rela;
3342 htab->elf.srelplt->reloc_count++;
3348 eh->plt_got.offset = (bfd_vma) -1;
3349 h->plt.offset = (bfd_vma) -1;
3355 eh->plt_got.offset = (bfd_vma) -1;
3356 h->plt.offset = (bfd_vma) -1;
3360 eh->tlsdesc_got = (bfd_vma) -1;
3362 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
3363 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
3364 if (h->got.refcount > 0
3365 && bfd_link_executable (info)
3367 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
3369 h->got.offset = (bfd_vma) -1;
3371 else if (h->got.refcount > 0)
3375 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
3377 /* Make sure this symbol is output as a dynamic symbol.
3378 Undefined weak syms won't yet be marked as dynamic. */
3379 if (h->dynindx == -1
3381 && !resolved_to_zero
3382 && h->root.type == bfd_link_hash_undefweak)
3384 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3388 if (GOT_TLS_GDESC_P (tls_type))
3390 eh->tlsdesc_got = htab->elf.sgotplt->size
3391 - elf_x86_64_compute_jump_table_size (htab);
3392 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3393 h->got.offset = (bfd_vma) -2;
3395 if (! GOT_TLS_GDESC_P (tls_type)
3396 || GOT_TLS_GD_P (tls_type))
3399 h->got.offset = s->size;
3400 s->size += GOT_ENTRY_SIZE;
3401 if (GOT_TLS_GD_P (tls_type))
3402 s->size += GOT_ENTRY_SIZE;
3404 dyn = htab->elf.dynamic_sections_created;
3405 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
3406 and two if global. R_X86_64_GOTTPOFF needs one dynamic
3407 relocation. No dynamic relocation against resolved undefined
3408 weak symbol in executable. */
3409 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
3410 || tls_type == GOT_TLS_IE)
3411 htab->elf.srelgot->size += bed->s->sizeof_rela;
3412 else if (GOT_TLS_GD_P (tls_type))
3413 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
3414 else if (! GOT_TLS_GDESC_P (tls_type)
3415 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3416 && !resolved_to_zero)
3417 || h->root.type != bfd_link_hash_undefweak)
3418 && (bfd_link_pic (info)
3419 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
3420 htab->elf.srelgot->size += bed->s->sizeof_rela;
3421 if (GOT_TLS_GDESC_P (tls_type))
3423 htab->elf.srelplt->size += bed->s->sizeof_rela;
3424 htab->tlsdesc_plt = (bfd_vma) -1;
3428 h->got.offset = (bfd_vma) -1;
3430 if (eh->dyn_relocs == NULL)
3433 /* In the shared -Bsymbolic case, discard space allocated for
3434 dynamic pc-relative relocs against symbols which turn out to be
3435 defined in regular objects. For the normal shared case, discard
3436 space for pc-relative relocs that have become local due to symbol
3437 visibility changes. */
3439 if (bfd_link_pic (info))
3441 /* Relocs that use pc_count are those that appear on a call
3442 insn, or certain REL relocs that can generated via assembly.
3443 We want calls to protected symbols to resolve directly to the
3444 function rather than going via the plt. If people want
3445 function pointer comparisons to work as expected then they
3446 should avoid writing weird assembly. */
3447 if (SYMBOL_CALLS_LOCAL (info, h))
3449 struct elf_dyn_relocs **pp;
3451 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3453 p->count -= p->pc_count;
3462 /* Also discard relocs on undefined weak syms with non-default
3463 visibility or in PIE. */
3464 if (eh->dyn_relocs != NULL)
3466 if (h->root.type == bfd_link_hash_undefweak)
3468 /* Undefined weak symbol is never bound locally in shared
3470 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3471 || resolved_to_zero)
3472 eh->dyn_relocs = NULL;
3473 else if (h->dynindx == -1
3474 && ! h->forced_local
3475 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3478 /* For PIE, discard space for pc-relative relocs against
3479 symbols which turn out to need copy relocs. */
3480 else if (bfd_link_executable (info)
3481 && (h->needs_copy || eh->needs_copy)
3485 struct elf_dyn_relocs **pp;
3487 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3489 if (p->pc_count != 0)
3497 else if (ELIMINATE_COPY_RELOCS)
3499 /* For the non-shared case, discard space for relocs against
3500 symbols which turn out to need copy relocs or are not
3501 dynamic. Keep dynamic relocations for run-time function
3502 pointer initialization. */
3504 if ((!h->non_got_ref
3505 || eh->func_pointer_refcount > 0
3506 || (h->root.type == bfd_link_hash_undefweak
3507 && !resolved_to_zero))
3510 || (htab->elf.dynamic_sections_created
3511 && (h->root.type == bfd_link_hash_undefweak
3512 || h->root.type == bfd_link_hash_undefined))))
3514 /* Make sure this symbol is output as a dynamic symbol.
3515 Undefined weak syms won't yet be marked as dynamic. */
3516 if (h->dynindx == -1
3517 && ! h->forced_local
3518 && ! resolved_to_zero
3519 && h->root.type == bfd_link_hash_undefweak
3520 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3523 /* If that succeeded, we know we'll be keeping all the
3525 if (h->dynindx != -1)
3529 eh->dyn_relocs = NULL;
3530 eh->func_pointer_refcount = 0;
3535 /* Finally, allocate space. */
3536 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3540 sreloc = elf_section_data (p->sec)->sreloc;
3542 BFD_ASSERT (sreloc != NULL);
3544 sreloc->size += p->count * bed->s->sizeof_rela;
3550 /* Allocate space in .plt, .got and associated reloc sections for
3551 local dynamic relocs. */
3554 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
3556 struct elf_link_hash_entry *h
3557 = (struct elf_link_hash_entry *) *slot;
3559 if (h->type != STT_GNU_IFUNC
3563 || h->root.type != bfd_link_hash_defined)
3566 return elf_x86_64_allocate_dynrelocs (h, inf);
3569 /* Find any dynamic relocs that apply to read-only sections. */
3572 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
3575 struct elf_x86_64_link_hash_entry *eh;
3576 struct elf_dyn_relocs *p;
3578 /* Skip local IFUNC symbols. */
3579 if (h->forced_local && h->type == STT_GNU_IFUNC)
3582 eh = (struct elf_x86_64_link_hash_entry *) h;
3583 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3585 asection *s = p->sec->output_section;
3587 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3589 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3591 info->flags |= DF_TEXTREL;
3593 if ((info->warn_shared_textrel && bfd_link_pic (info))
3594 || info->error_textrel)
3595 /* xgettext:c-format */
3596 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3597 p->sec->owner, h->root.root.string,
3600 /* Not an error, just cut short the traversal. */
3607 /* Convert load via the GOT slot to load immediate. */
3610 elf_x86_64_convert_load (bfd *abfd, asection *sec,
3611 struct bfd_link_info *link_info)
3613 Elf_Internal_Shdr *symtab_hdr;
3614 Elf_Internal_Rela *internal_relocs;
3615 Elf_Internal_Rela *irel, *irelend;
3617 struct elf_x86_64_link_hash_table *htab;
3618 bfd_boolean changed;
3619 bfd_signed_vma *local_got_refcounts;
3621 /* Don't even try to convert non-ELF outputs. */
3622 if (!is_elf_hash_table (link_info->hash))
3625 /* Nothing to do if there is no need or no output. */
3626 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3627 || sec->need_convert_load == 0
3628 || bfd_is_abs_section (sec->output_section))
3631 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3633 /* Load the relocations for this section. */
3634 internal_relocs = (_bfd_elf_link_read_relocs
3635 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3636 link_info->keep_memory));
3637 if (internal_relocs == NULL)
3641 htab = elf_x86_64_hash_table (link_info);
3642 local_got_refcounts = elf_local_got_refcounts (abfd);
3644 /* Get the section contents. */
3645 if (elf_section_data (sec)->this_hdr.contents != NULL)
3646 contents = elf_section_data (sec)->this_hdr.contents;
3649 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3653 irelend = internal_relocs + sec->reloc_count;
3654 for (irel = internal_relocs; irel < irelend; irel++)
3656 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3657 unsigned int r_symndx;
3658 struct elf_link_hash_entry *h;
3659 bfd_boolean converted;
3661 if (r_type != R_X86_64_GOTPCRELX
3662 && r_type != R_X86_64_REX_GOTPCRELX
3663 && r_type != R_X86_64_GOTPCREL)
3666 r_symndx = htab->r_sym (irel->r_info);
3667 if (r_symndx < symtab_hdr->sh_info)
3668 h = elf_x86_64_get_local_sym_hash (htab, sec->owner,
3669 (const Elf_Internal_Rela *) irel,
3673 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
3674 while (h->root.type == bfd_link_hash_indirect
3675 || h->root.type == bfd_link_hash_warning)
3676 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3679 /* STT_GNU_IFUNC must keep GOTPCREL relocations. */
3680 if (h != NULL && h->type == STT_GNU_IFUNC)
3684 if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h,
3685 &converted, link_info))
3690 changed = converted;
3693 if (h->got.refcount > 0)
3694 h->got.refcount -= 1;
3698 if (local_got_refcounts != NULL
3699 && local_got_refcounts[r_symndx] > 0)
3700 local_got_refcounts[r_symndx] -= 1;
3705 if (contents != NULL
3706 && elf_section_data (sec)->this_hdr.contents != contents)
3708 if (!changed && !link_info->keep_memory)
3712 /* Cache the section contents for elf_link_input_bfd. */
3713 elf_section_data (sec)->this_hdr.contents = contents;
3717 if (elf_section_data (sec)->relocs != internal_relocs)
3720 free (internal_relocs);
3722 elf_section_data (sec)->relocs = internal_relocs;
3728 if (contents != NULL
3729 && elf_section_data (sec)->this_hdr.contents != contents)
3731 if (internal_relocs != NULL
3732 && elf_section_data (sec)->relocs != internal_relocs)
3733 free (internal_relocs);
3737 /* Set the sizes of the dynamic sections. */
3740 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
3741 struct bfd_link_info *info)
3743 struct elf_x86_64_link_hash_table *htab;
3748 const struct elf_backend_data *bed;
3750 htab = elf_x86_64_hash_table (info);
3753 bed = get_elf_backend_data (output_bfd);
3755 dynobj = htab->elf.dynobj;
3759 /* Set up .got offsets for local syms, and space for local dynamic
3761 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3763 bfd_signed_vma *local_got;
3764 bfd_signed_vma *end_local_got;
3765 char *local_tls_type;
3766 bfd_vma *local_tlsdesc_gotent;
3767 bfd_size_type locsymcount;
3768 Elf_Internal_Shdr *symtab_hdr;
3771 if (! is_x86_64_elf (ibfd))
3774 for (s = ibfd->sections; s != NULL; s = s->next)
3776 struct elf_dyn_relocs *p;
3778 if (!elf_x86_64_convert_load (ibfd, s, info))
3781 for (p = (struct elf_dyn_relocs *)
3782 (elf_section_data (s)->local_dynrel);
3786 if (!bfd_is_abs_section (p->sec)
3787 && bfd_is_abs_section (p->sec->output_section))
3789 /* Input section has been discarded, either because
3790 it is a copy of a linkonce section or due to
3791 linker script /DISCARD/, so we'll be discarding
3794 else if (p->count != 0)
3796 srel = elf_section_data (p->sec)->sreloc;
3797 srel->size += p->count * bed->s->sizeof_rela;
3798 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3799 && (info->flags & DF_TEXTREL) == 0)
3801 info->flags |= DF_TEXTREL;
3802 if ((info->warn_shared_textrel && bfd_link_pic (info))
3803 || info->error_textrel)
3804 /* xgettext:c-format */
3805 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3806 p->sec->owner, p->sec);
3812 local_got = elf_local_got_refcounts (ibfd);
3816 symtab_hdr = &elf_symtab_hdr (ibfd);
3817 locsymcount = symtab_hdr->sh_info;
3818 end_local_got = local_got + locsymcount;
3819 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
3820 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
3822 srel = htab->elf.srelgot;
3823 for (; local_got < end_local_got;
3824 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3826 *local_tlsdesc_gotent = (bfd_vma) -1;
3829 if (GOT_TLS_GDESC_P (*local_tls_type))
3831 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3832 - elf_x86_64_compute_jump_table_size (htab);
3833 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3834 *local_got = (bfd_vma) -2;
3836 if (! GOT_TLS_GDESC_P (*local_tls_type)
3837 || GOT_TLS_GD_P (*local_tls_type))
3839 *local_got = s->size;
3840 s->size += GOT_ENTRY_SIZE;
3841 if (GOT_TLS_GD_P (*local_tls_type))
3842 s->size += GOT_ENTRY_SIZE;
3844 if (bfd_link_pic (info)
3845 || GOT_TLS_GD_ANY_P (*local_tls_type)
3846 || *local_tls_type == GOT_TLS_IE)
3848 if (GOT_TLS_GDESC_P (*local_tls_type))
3850 htab->elf.srelplt->size
3851 += bed->s->sizeof_rela;
3852 htab->tlsdesc_plt = (bfd_vma) -1;
3854 if (! GOT_TLS_GDESC_P (*local_tls_type)
3855 || GOT_TLS_GD_P (*local_tls_type))
3856 srel->size += bed->s->sizeof_rela;
3860 *local_got = (bfd_vma) -1;
3864 if (htab->tls_ld_got.refcount > 0)
3866 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3868 htab->tls_ld_got.offset = htab->elf.sgot->size;
3869 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
3870 htab->elf.srelgot->size += bed->s->sizeof_rela;
3873 htab->tls_ld_got.offset = -1;
3875 /* Allocate global sym .plt and .got entries, and space for global
3876 sym dynamic relocs. */
3877 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
3880 /* Allocate .plt and .got entries, and space for local symbols. */
3881 htab_traverse (htab->loc_hash_table,
3882 elf_x86_64_allocate_local_dynrelocs,
3885 /* For every jump slot reserved in the sgotplt, reloc_count is
3886 incremented. However, when we reserve space for TLS descriptors,
3887 it's not incremented, so in order to compute the space reserved
3888 for them, it suffices to multiply the reloc count by the jump
3891 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3892 so that R_X86_64_IRELATIVE entries come last. */
3893 if (htab->elf.srelplt)
3895 htab->sgotplt_jump_table_size
3896 = elf_x86_64_compute_jump_table_size (htab);
3897 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3899 else if (htab->elf.irelplt)
3900 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3902 if (htab->tlsdesc_plt)
3904 /* If we're not using lazy TLS relocations, don't generate the
3905 PLT and GOT entries they require. */
3906 if ((info->flags & DF_BIND_NOW))
3907 htab->tlsdesc_plt = 0;
3910 htab->tlsdesc_got = htab->elf.sgot->size;
3911 htab->elf.sgot->size += GOT_ENTRY_SIZE;
3912 /* Reserve room for the initial entry.
3913 FIXME: we could probably do away with it in this case. */
3914 if (htab->elf.splt->size == 0)
3915 htab->elf.splt->size = htab->plt.plt_entry_size;
3916 htab->tlsdesc_plt = htab->elf.splt->size;
3917 htab->elf.splt->size += htab->plt.plt_entry_size;
3921 if (htab->elf.sgotplt)
3923 /* Don't allocate .got.plt section if there are no GOT nor PLT
3924 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3925 if ((htab->elf.hgot == NULL
3926 || !htab->elf.hgot->ref_regular_nonweak)
3927 && (htab->elf.sgotplt->size
3928 == get_elf_backend_data (output_bfd)->got_header_size)
3929 && (htab->elf.splt == NULL
3930 || htab->elf.splt->size == 0)
3931 && (htab->elf.sgot == NULL
3932 || htab->elf.sgot->size == 0)
3933 && (htab->elf.iplt == NULL
3934 || htab->elf.iplt->size == 0)
3935 && (htab->elf.igotplt == NULL
3936 || htab->elf.igotplt->size == 0))
3937 htab->elf.sgotplt->size = 0;
3940 if (_bfd_elf_eh_frame_present (info))
3942 if (htab->plt_eh_frame != NULL
3943 && htab->elf.splt != NULL
3944 && htab->elf.splt->size != 0
3945 && !bfd_is_abs_section (htab->elf.splt->output_section))
3946 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
3948 if (htab->plt_got_eh_frame != NULL
3949 && htab->plt_got != NULL
3950 && htab->plt_got->size != 0
3951 && !bfd_is_abs_section (htab->plt_got->output_section))
3952 htab->plt_got_eh_frame->size
3953 = htab->non_lazy_plt->eh_frame_plt_size;
3955 /* Unwind info for the second PLT and .plt.got sections are
3957 if (htab->plt_second_eh_frame != NULL
3958 && htab->plt_second != NULL
3959 && htab->plt_second->size != 0
3960 && !bfd_is_abs_section (htab->plt_second->output_section))
3961 htab->plt_second_eh_frame->size
3962 = htab->non_lazy_plt->eh_frame_plt_size;
3965 /* We now have determined the sizes of the various dynamic sections.
3966 Allocate memory for them. */
3968 for (s = dynobj->sections; s != NULL; s = s->next)
3970 if ((s->flags & SEC_LINKER_CREATED) == 0)
3973 if (s == htab->elf.splt
3974 || s == htab->elf.sgot
3975 || s == htab->elf.sgotplt
3976 || s == htab->elf.iplt
3977 || s == htab->elf.igotplt
3978 || s == htab->plt_second
3979 || s == htab->plt_got
3980 || s == htab->plt_eh_frame
3981 || s == htab->plt_got_eh_frame
3982 || s == htab->plt_second_eh_frame
3983 || s == htab->elf.sdynbss
3984 || s == htab->elf.sdynrelro)
3986 /* Strip this section if we don't need it; see the
3989 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
3991 if (s->size != 0 && s != htab->elf.srelplt)
3994 /* We use the reloc_count field as a counter if we need
3995 to copy relocs into the output file. */
3996 if (s != htab->elf.srelplt)
4001 /* It's not one of our sections, so don't allocate space. */
4007 /* If we don't need this section, strip it from the
4008 output file. This is mostly to handle .rela.bss and
4009 .rela.plt. We must create both sections in
4010 create_dynamic_sections, because they must be created
4011 before the linker maps input sections to output
4012 sections. The linker does that before
4013 adjust_dynamic_symbol is called, and it is that
4014 function which decides whether anything needs to go
4015 into these sections. */
4017 s->flags |= SEC_EXCLUDE;
4021 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4024 /* Allocate memory for the section contents. We use bfd_zalloc
4025 here in case unused entries are not reclaimed before the
4026 section's contents are written out. This should not happen,
4027 but this way if it does, we get a R_X86_64_NONE reloc instead
4029 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4030 if (s->contents == NULL)
4034 if (htab->plt_eh_frame != NULL
4035 && htab->plt_eh_frame->contents != NULL)
4037 memcpy (htab->plt_eh_frame->contents,
4038 htab->plt.eh_frame_plt, htab->plt_eh_frame->size);
4039 bfd_put_32 (dynobj, htab->elf.splt->size,
4040 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
4043 if (htab->plt_got_eh_frame != NULL
4044 && htab->plt_got_eh_frame->contents != NULL)
4046 memcpy (htab->plt_got_eh_frame->contents,
4047 htab->non_lazy_plt->eh_frame_plt,
4048 htab->plt_got_eh_frame->size);
4049 bfd_put_32 (dynobj, htab->plt_got->size,
4050 (htab->plt_got_eh_frame->contents
4051 + PLT_FDE_LEN_OFFSET));
4054 if (htab->plt_second_eh_frame != NULL
4055 && htab->plt_second_eh_frame->contents != NULL)
4057 memcpy (htab->plt_second_eh_frame->contents,
4058 htab->non_lazy_plt->eh_frame_plt,
4059 htab->plt_second_eh_frame->size);
4060 bfd_put_32 (dynobj, htab->plt_second->size,
4061 (htab->plt_second_eh_frame->contents
4062 + PLT_FDE_LEN_OFFSET));
4065 if (htab->elf.dynamic_sections_created)
4067 /* Add some entries to the .dynamic section. We fill in the
4068 values later, in elf_x86_64_finish_dynamic_sections, but we
4069 must add the entries now so that we get the correct size for
4070 the .dynamic section. The DT_DEBUG entry is filled in by the
4071 dynamic linker and used by the debugger. */
4072 #define add_dynamic_entry(TAG, VAL) \
4073 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4075 if (bfd_link_executable (info))
4077 if (!add_dynamic_entry (DT_DEBUG, 0))
4081 if (htab->elf.splt->size != 0)
4083 /* DT_PLTGOT is used by prelink even if there is no PLT
4085 if (!add_dynamic_entry (DT_PLTGOT, 0))
4089 if (htab->elf.srelplt->size != 0)
4091 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
4092 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4093 || !add_dynamic_entry (DT_JMPREL, 0))
4097 if (htab->tlsdesc_plt
4098 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
4099 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
4104 if (!add_dynamic_entry (DT_RELA, 0)
4105 || !add_dynamic_entry (DT_RELASZ, 0)
4106 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
4109 /* If any dynamic relocs apply to a read-only section,
4110 then we need a DT_TEXTREL entry. */
4111 if ((info->flags & DF_TEXTREL) == 0)
4112 elf_link_hash_traverse (&htab->elf,
4113 elf_x86_64_readonly_dynrelocs,
4116 if ((info->flags & DF_TEXTREL) != 0)
4118 if (htab->readonly_dynrelocs_against_ifunc)
4120 info->callbacks->einfo
4121 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
4122 bfd_set_error (bfd_error_bad_value);
4126 if (!add_dynamic_entry (DT_TEXTREL, 0))
4131 #undef add_dynamic_entry
4137 elf_x86_64_always_size_sections (bfd *output_bfd,
4138 struct bfd_link_info *info)
4140 asection *tls_sec = elf_hash_table (info)->tls_sec;
4144 struct elf_link_hash_entry *tlsbase;
4146 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
4147 "_TLS_MODULE_BASE_",
4148 FALSE, FALSE, FALSE);
4150 if (tlsbase && tlsbase->type == STT_TLS)
4152 struct elf_x86_64_link_hash_table *htab;
4153 struct bfd_link_hash_entry *bh = NULL;
4154 const struct elf_backend_data *bed
4155 = get_elf_backend_data (output_bfd);
4157 htab = elf_x86_64_hash_table (info);
4161 if (!(_bfd_generic_link_add_one_symbol
4162 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
4163 tls_sec, 0, NULL, FALSE,
4164 bed->collect, &bh)))
4167 htab->tls_module_base = bh;
4169 tlsbase = (struct elf_link_hash_entry *)bh;
4170 tlsbase->def_regular = 1;
4171 tlsbase->other = STV_HIDDEN;
4172 tlsbase->root.linker_def = 1;
4173 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
4180 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
4181 executables. Rather than setting it to the beginning of the TLS
4182 section, we have to set it to the end. This function may be called
4183 multiple times, it is idempotent. */
4186 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
4188 struct elf_x86_64_link_hash_table *htab;
4189 struct bfd_link_hash_entry *base;
4191 if (!bfd_link_executable (info))
4194 htab = elf_x86_64_hash_table (info);
4198 base = htab->tls_module_base;
4202 base->u.def.value = htab->elf.tls_size;
4205 /* Return the base VMA address which should be subtracted from real addresses
4206 when resolving @dtpoff relocation.
4207 This is PT_TLS segment p_vaddr. */
4210 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
4212 /* If tls_sec is NULL, we should have signalled an error already. */
4213 if (elf_hash_table (info)->tls_sec == NULL)
4215 return elf_hash_table (info)->tls_sec->vma;
4218 /* Return the relocation value for @tpoff relocation
4219 if STT_TLS virtual address is ADDRESS. */
4222 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
4224 struct elf_link_hash_table *htab = elf_hash_table (info);
4225 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
4226 bfd_vma static_tls_size;
4228 /* If tls_segment is NULL, we should have signalled an error already. */
4229 if (htab->tls_sec == NULL)
4232 /* Consider special static TLS alignment requirements. */
4233 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
4234 return address - static_tls_size - htab->tls_sec->vma;
4237 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
4241 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
4243 /* Opcode Instruction
4246 0x0f 0x8x conditional jump */
4248 && (contents [offset - 1] == 0xe8
4249 || contents [offset - 1] == 0xe9))
4251 && contents [offset - 2] == 0x0f
4252 && (contents [offset - 1] & 0xf0) == 0x80));
4255 /* Relocate an x86_64 ELF section. */
4258 elf_x86_64_relocate_section (bfd *output_bfd,
4259 struct bfd_link_info *info,
4261 asection *input_section,
4263 Elf_Internal_Rela *relocs,
4264 Elf_Internal_Sym *local_syms,
4265 asection **local_sections)
4267 struct elf_x86_64_link_hash_table *htab;
4268 Elf_Internal_Shdr *symtab_hdr;
4269 struct elf_link_hash_entry **sym_hashes;
4270 bfd_vma *local_got_offsets;
4271 bfd_vma *local_tlsdesc_gotents;
4272 Elf_Internal_Rela *rel;
4273 Elf_Internal_Rela *wrel;
4274 Elf_Internal_Rela *relend;
4275 unsigned int plt_entry_size;
4277 BFD_ASSERT (is_x86_64_elf (input_bfd));
4279 /* Skip if check_relocs failed. */
4280 if (input_section->check_relocs_failed)
4283 htab = elf_x86_64_hash_table (info);
4286 plt_entry_size = htab->plt.plt_entry_size;
4287 symtab_hdr = &elf_symtab_hdr (input_bfd);
4288 sym_hashes = elf_sym_hashes (input_bfd);
4289 local_got_offsets = elf_local_got_offsets (input_bfd);
4290 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
4292 elf_x86_64_set_tls_module_base (info);
4294 rel = wrel = relocs;
4295 relend = relocs + input_section->reloc_count;
4296 for (; rel < relend; wrel++, rel++)
4298 unsigned int r_type;
4299 reloc_howto_type *howto;
4300 unsigned long r_symndx;
4301 struct elf_link_hash_entry *h;
4302 struct elf_x86_64_link_hash_entry *eh;
4303 Elf_Internal_Sym *sym;
4305 bfd_vma off, offplt, plt_offset;
4307 bfd_boolean unresolved_reloc;
4308 bfd_reloc_status_type r;
4310 asection *base_got, *resolved_plt;
4312 bfd_boolean resolved_to_zero;
4313 bfd_boolean relative_reloc;
4315 r_type = ELF32_R_TYPE (rel->r_info);
4316 if (r_type == (int) R_X86_64_GNU_VTINHERIT
4317 || r_type == (int) R_X86_64_GNU_VTENTRY)
4324 if (r_type >= (int) R_X86_64_standard)
4325 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
4327 if (r_type != (int) R_X86_64_32
4328 || ABI_64_P (output_bfd))
4329 howto = x86_64_elf_howto_table + r_type;
4331 howto = (x86_64_elf_howto_table
4332 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
4333 r_symndx = htab->r_sym (rel->r_info);
4337 unresolved_reloc = FALSE;
4338 if (r_symndx < symtab_hdr->sh_info)
4340 sym = local_syms + r_symndx;
4341 sec = local_sections[r_symndx];
4343 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
4345 st_size = sym->st_size;
4347 /* Relocate against local STT_GNU_IFUNC symbol. */
4348 if (!bfd_link_relocatable (info)
4349 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4351 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
4356 /* Set STT_GNU_IFUNC symbol value. */
4357 h->root.u.def.value = sym->st_value;
4358 h->root.u.def.section = sec;
4363 bfd_boolean warned ATTRIBUTE_UNUSED;
4364 bfd_boolean ignored ATTRIBUTE_UNUSED;
4366 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4367 r_symndx, symtab_hdr, sym_hashes,
4369 unresolved_reloc, warned, ignored);
4373 if (sec != NULL && discarded_section (sec))
4375 _bfd_clear_contents (howto, input_bfd, input_section,
4376 contents + rel->r_offset);
4377 wrel->r_offset = rel->r_offset;
4381 /* For ld -r, remove relocations in debug sections against
4382 sections defined in discarded sections. Not done for
4383 eh_frame editing code expects to be present. */
4384 if (bfd_link_relocatable (info)
4385 && (input_section->flags & SEC_DEBUGGING))
4391 if (bfd_link_relocatable (info))
4398 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
4400 if (r_type == R_X86_64_64)
4402 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
4403 zero-extend it to 64bit if addend is zero. */
4404 r_type = R_X86_64_32;
4405 memset (contents + rel->r_offset + 4, 0, 4);
4407 else if (r_type == R_X86_64_SIZE64)
4409 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
4410 zero-extend it to 64bit if addend is zero. */
4411 r_type = R_X86_64_SIZE32;
4412 memset (contents + rel->r_offset + 4, 0, 4);
4416 eh = (struct elf_x86_64_link_hash_entry *) h;
4418 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4419 it here if it is defined in a non-shared object. */
4421 && h->type == STT_GNU_IFUNC
4427 if ((input_section->flags & SEC_ALLOC) == 0)
4429 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4430 sections because such sections are not SEC_ALLOC and
4431 thus ld.so will not process them. */
4432 if ((input_section->flags & SEC_DEBUGGING) != 0)
4442 case R_X86_64_GOTPCREL:
4443 case R_X86_64_GOTPCRELX:
4444 case R_X86_64_REX_GOTPCRELX:
4445 case R_X86_64_GOTPCREL64:
4446 base_got = htab->elf.sgot;
4447 off = h->got.offset;
4449 if (base_got == NULL)
4452 if (off == (bfd_vma) -1)
4454 /* We can't use h->got.offset here to save state, or
4455 even just remember the offset, as finish_dynamic_symbol
4456 would use that as offset into .got. */
4458 if (h->plt.offset == (bfd_vma) -1)
4461 if (htab->elf.splt != NULL)
4463 plt_index = (h->plt.offset / plt_entry_size
4464 - htab->plt.has_plt0);
4465 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4466 base_got = htab->elf.sgotplt;
4470 plt_index = h->plt.offset / plt_entry_size;
4471 off = plt_index * GOT_ENTRY_SIZE;
4472 base_got = htab->elf.igotplt;
4475 if (h->dynindx == -1
4479 /* This references the local defitionion. We must
4480 initialize this entry in the global offset table.
4481 Since the offset must always be a multiple of 8,
4482 we use the least significant bit to record
4483 whether we have initialized it already.
4485 When doing a dynamic link, we create a .rela.got
4486 relocation entry to initialize the value. This
4487 is done in the finish_dynamic_symbol routine. */
4492 bfd_put_64 (output_bfd, relocation,
4493 base_got->contents + off);
4494 /* Note that this is harmless for the GOTPLT64
4495 case, as -1 | 1 still is -1. */
4501 relocation = (base_got->output_section->vma
4502 + base_got->output_offset + off);
4507 if (h->plt.offset == (bfd_vma) -1)
4509 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4510 if (r_type == htab->pointer_r_type
4511 && (input_section->flags & SEC_CODE) == 0)
4512 goto do_ifunc_pointer;
4513 goto bad_ifunc_reloc;
4516 /* STT_GNU_IFUNC symbol must go through PLT. */
4517 if (htab->elf.splt != NULL)
4519 if (htab->plt_second != NULL)
4521 resolved_plt = htab->plt_second;
4522 plt_offset = eh->plt_second.offset;
4526 resolved_plt = htab->elf.splt;
4527 plt_offset = h->plt.offset;
4532 resolved_plt = htab->elf.iplt;
4533 plt_offset = h->plt.offset;
4536 relocation = (resolved_plt->output_section->vma
4537 + resolved_plt->output_offset + plt_offset);
4543 if (h->root.root.string)
4544 name = h->root.root.string;
4546 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4549 /* xgettext:c-format */
4550 (_("%B: relocation %s against STT_GNU_IFUNC "
4551 "symbol `%s' isn't supported"), input_bfd,
4553 bfd_set_error (bfd_error_bad_value);
4557 if (bfd_link_pic (info))
4562 if (ABI_64_P (output_bfd))
4567 if (rel->r_addend != 0)
4569 if (h->root.root.string)
4570 name = h->root.root.string;
4572 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4575 /* xgettext:c-format */
4576 (_("%B: relocation %s against STT_GNU_IFUNC "
4577 "symbol `%s' has non-zero addend: %Ld"),
4578 input_bfd, howto->name, name, rel->r_addend);
4579 bfd_set_error (bfd_error_bad_value);
4583 /* Generate dynamic relcoation only when there is a
4584 non-GOT reference in a shared object or there is no
4586 if ((bfd_link_pic (info) && h->non_got_ref)
4587 || h->plt.offset == (bfd_vma) -1)
4589 Elf_Internal_Rela outrel;
4592 /* Need a dynamic relocation to get the real function
4594 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4598 if (outrel.r_offset == (bfd_vma) -1
4599 || outrel.r_offset == (bfd_vma) -2)
4602 outrel.r_offset += (input_section->output_section->vma
4603 + input_section->output_offset);
4605 if (h->dynindx == -1
4607 || bfd_link_executable (info))
4609 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4610 h->root.root.string,
4611 h->root.u.def.section->owner);
4613 /* This symbol is resolved locally. */
4614 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4615 outrel.r_addend = (h->root.u.def.value
4616 + h->root.u.def.section->output_section->vma
4617 + h->root.u.def.section->output_offset);
4621 outrel.r_info = htab->r_info (h->dynindx, r_type);
4622 outrel.r_addend = 0;
4625 /* Dynamic relocations are stored in
4626 1. .rela.ifunc section in PIC object.
4627 2. .rela.got section in dynamic executable.
4628 3. .rela.iplt section in static executable. */
4629 if (bfd_link_pic (info))
4630 sreloc = htab->elf.irelifunc;
4631 else if (htab->elf.splt != NULL)
4632 sreloc = htab->elf.srelgot;
4634 sreloc = htab->elf.irelplt;
4635 elf_append_rela (output_bfd, sreloc, &outrel);
4637 /* If this reloc is against an external symbol, we
4638 do not want to fiddle with the addend. Otherwise,
4639 we need to include the symbol value so that it
4640 becomes an addend for the dynamic reloc. For an
4641 internal symbol, we have updated addend. */
4646 case R_X86_64_PC32_BND:
4648 case R_X86_64_PLT32:
4649 case R_X86_64_PLT32_BND:
4654 resolved_to_zero = (eh != NULL
4655 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4659 /* When generating a shared object, the relocations handled here are
4660 copied into the output file to be resolved at run time. */
4663 case R_X86_64_GOT32:
4664 case R_X86_64_GOT64:
4665 /* Relocation is to the entry for this symbol in the global
4667 case R_X86_64_GOTPCREL:
4668 case R_X86_64_GOTPCRELX:
4669 case R_X86_64_REX_GOTPCRELX:
4670 case R_X86_64_GOTPCREL64:
4671 /* Use global offset table entry as symbol value. */
4672 case R_X86_64_GOTPLT64:
4673 /* This is obsolete and treated the same as GOT64. */
4674 base_got = htab->elf.sgot;
4676 if (htab->elf.sgot == NULL)
4679 relative_reloc = FALSE;
4684 off = h->got.offset;
4686 && h->plt.offset != (bfd_vma)-1
4687 && off == (bfd_vma)-1)
4689 /* We can't use h->got.offset here to save
4690 state, or even just remember the offset, as
4691 finish_dynamic_symbol would use that as offset into
4693 bfd_vma plt_index = (h->plt.offset / plt_entry_size
4694 - htab->plt.has_plt0);
4695 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4696 base_got = htab->elf.sgotplt;
4699 dyn = htab->elf.dynamic_sections_created;
4701 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4702 || (bfd_link_pic (info)
4703 && SYMBOL_REFERENCES_LOCAL (info, h))
4704 || (ELF_ST_VISIBILITY (h->other)
4705 && h->root.type == bfd_link_hash_undefweak))
4707 /* This is actually a static link, or it is a -Bsymbolic
4708 link and the symbol is defined locally, or the symbol
4709 was forced to be local because of a version file. We
4710 must initialize this entry in the global offset table.
4711 Since the offset must always be a multiple of 8, we
4712 use the least significant bit to record whether we
4713 have initialized it already.
4715 When doing a dynamic link, we create a .rela.got
4716 relocation entry to initialize the value. This is
4717 done in the finish_dynamic_symbol routine. */
4722 bfd_put_64 (output_bfd, relocation,
4723 base_got->contents + off);
4724 /* Note that this is harmless for the GOTPLT64 case,
4725 as -1 | 1 still is -1. */
4728 if (h->dynindx == -1
4730 && h->root.type != bfd_link_hash_undefweak
4731 && bfd_link_pic (info))
4733 /* If this symbol isn't dynamic in PIC,
4734 generate R_X86_64_RELATIVE here. */
4735 eh->no_finish_dynamic_symbol = 1;
4736 relative_reloc = TRUE;
4741 unresolved_reloc = FALSE;
4745 if (local_got_offsets == NULL)
4748 off = local_got_offsets[r_symndx];
4750 /* The offset must always be a multiple of 8. We use
4751 the least significant bit to record whether we have
4752 already generated the necessary reloc. */
4757 bfd_put_64 (output_bfd, relocation,
4758 base_got->contents + off);
4759 local_got_offsets[r_symndx] |= 1;
4761 if (bfd_link_pic (info))
4762 relative_reloc = TRUE;
4769 Elf_Internal_Rela outrel;
4771 /* We need to generate a R_X86_64_RELATIVE reloc
4772 for the dynamic linker. */
4773 s = htab->elf.srelgot;
4777 outrel.r_offset = (base_got->output_section->vma
4778 + base_got->output_offset
4780 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4781 outrel.r_addend = relocation;
4782 elf_append_rela (output_bfd, s, &outrel);
4785 if (off >= (bfd_vma) -2)
4788 relocation = base_got->output_section->vma
4789 + base_got->output_offset + off;
4790 if (r_type != R_X86_64_GOTPCREL
4791 && r_type != R_X86_64_GOTPCRELX
4792 && r_type != R_X86_64_REX_GOTPCRELX
4793 && r_type != R_X86_64_GOTPCREL64)
4794 relocation -= htab->elf.sgotplt->output_section->vma
4795 - htab->elf.sgotplt->output_offset;
4799 case R_X86_64_GOTOFF64:
4800 /* Relocation is relative to the start of the global offset
4803 /* Check to make sure it isn't a protected function or data
4804 symbol for shared library since it may not be local when
4805 used as function address or with copy relocation. We also
4806 need to make sure that a symbol is referenced locally. */
4807 if (bfd_link_pic (info) && h)
4809 if (!h->def_regular)
4813 switch (ELF_ST_VISIBILITY (h->other))
4816 v = _("hidden symbol");
4819 v = _("internal symbol");
4822 v = _("protected symbol");
4830 /* xgettext:c-format */
4831 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
4832 " `%s' can not be used when making a shared object"),
4833 input_bfd, v, h->root.root.string);
4834 bfd_set_error (bfd_error_bad_value);
4837 else if (!bfd_link_executable (info)
4838 && !SYMBOL_REFERENCES_LOCAL (info, h)
4839 && (h->type == STT_FUNC
4840 || h->type == STT_OBJECT)
4841 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4844 /* xgettext:c-format */
4845 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
4846 " `%s' can not be used when making a shared object"),
4848 h->type == STT_FUNC ? "function" : "data",
4849 h->root.root.string);
4850 bfd_set_error (bfd_error_bad_value);
4855 /* Note that sgot is not involved in this
4856 calculation. We always want the start of .got.plt. If we
4857 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4858 permitted by the ABI, we might have to change this
4860 relocation -= htab->elf.sgotplt->output_section->vma
4861 + htab->elf.sgotplt->output_offset;
4864 case R_X86_64_GOTPC32:
4865 case R_X86_64_GOTPC64:
4866 /* Use global offset table as symbol value. */
4867 relocation = htab->elf.sgotplt->output_section->vma
4868 + htab->elf.sgotplt->output_offset;
4869 unresolved_reloc = FALSE;
4872 case R_X86_64_PLTOFF64:
4873 /* Relocation is PLT entry relative to GOT. For local
4874 symbols it's the symbol itself relative to GOT. */
4876 /* See PLT32 handling. */
4877 && (h->plt.offset != (bfd_vma) -1
4878 || eh->plt_got.offset != (bfd_vma) -1)
4879 && htab->elf.splt != NULL)
4881 if (eh->plt_got.offset != (bfd_vma) -1)
4883 /* Use the GOT PLT. */
4884 resolved_plt = htab->plt_got;
4885 plt_offset = eh->plt_got.offset;
4887 else if (htab->plt_second != NULL)
4889 resolved_plt = htab->plt_second;
4890 plt_offset = eh->plt_second.offset;
4894 resolved_plt = htab->elf.splt;
4895 plt_offset = h->plt.offset;
4898 relocation = (resolved_plt->output_section->vma
4899 + resolved_plt->output_offset
4901 unresolved_reloc = FALSE;
4904 relocation -= htab->elf.sgotplt->output_section->vma
4905 + htab->elf.sgotplt->output_offset;
4908 case R_X86_64_PLT32:
4909 case R_X86_64_PLT32_BND:
4910 /* Relocation is to the entry for this symbol in the
4911 procedure linkage table. */
4913 /* Resolve a PLT32 reloc against a local symbol directly,
4914 without using the procedure linkage table. */
4918 if ((h->plt.offset == (bfd_vma) -1
4919 && eh->plt_got.offset == (bfd_vma) -1)
4920 || htab->elf.splt == NULL)
4922 /* We didn't make a PLT entry for this symbol. This
4923 happens when statically linking PIC code, or when
4924 using -Bsymbolic. */
4928 if (h->plt.offset != (bfd_vma) -1)
4930 if (htab->plt_second != NULL)
4932 resolved_plt = htab->plt_second;
4933 plt_offset = eh->plt_second.offset;
4937 resolved_plt = htab->elf.splt;
4938 plt_offset = h->plt.offset;
4943 /* Use the GOT PLT. */
4944 resolved_plt = htab->plt_got;
4945 plt_offset = eh->plt_got.offset;
4948 relocation = (resolved_plt->output_section->vma
4949 + resolved_plt->output_offset
4951 unresolved_reloc = FALSE;
4954 case R_X86_64_SIZE32:
4955 case R_X86_64_SIZE64:
4956 /* Set to symbol size. */
4957 relocation = st_size;
4963 case R_X86_64_PC32_BND:
4964 /* Don't complain about -fPIC if the symbol is undefined when
4965 building executable unless it is unresolved weak symbol or
4966 -z nocopyreloc is used. */
4967 if ((input_section->flags & SEC_ALLOC) != 0
4968 && (input_section->flags & SEC_READONLY) != 0
4970 && ((bfd_link_executable (info)
4971 && ((h->root.type == bfd_link_hash_undefweak
4972 && !resolved_to_zero)
4973 || ((info->nocopyreloc
4974 || (eh->def_protected
4975 && elf_has_no_copy_on_protected (h->root.u.def.section->owner)))
4977 && !(h->root.u.def.section->flags & SEC_CODE))))
4978 || bfd_link_dll (info)))
4980 bfd_boolean fail = FALSE;
4982 = ((r_type == R_X86_64_PC32
4983 || r_type == R_X86_64_PC32_BND)
4984 && is_32bit_relative_branch (contents, rel->r_offset));
4986 if (SYMBOL_REFERENCES_LOCAL (info, h))
4988 /* Symbol is referenced locally. Make sure it is
4989 defined locally or for a branch. */
4990 fail = (!(h->def_regular || ELF_COMMON_DEF_P (h))
4993 else if (!(bfd_link_pie (info)
4994 && (h->needs_copy || eh->needs_copy)))
4996 /* Symbol doesn't need copy reloc and isn't referenced
4997 locally. We only allow branch to symbol with
4998 non-default visibility. */
5000 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
5004 return elf_x86_64_need_pic (info, input_bfd, input_section,
5005 h, NULL, NULL, howto);
5014 /* FIXME: The ABI says the linker should make sure the value is
5015 the same when it's zeroextended to 64 bit. */
5018 if ((input_section->flags & SEC_ALLOC) == 0)
5021 /* Don't copy a pc-relative relocation into the output file
5022 if the symbol needs copy reloc or the symbol is undefined
5023 when building executable. Copy dynamic function pointer
5024 relocations. Don't generate dynamic relocations against
5025 resolved undefined weak symbols in PIE. */
5026 if ((bfd_link_pic (info)
5027 && !(bfd_link_pie (info)
5031 || h->root.type == bfd_link_hash_undefined)
5032 && (IS_X86_64_PCREL_TYPE (r_type)
5033 || r_type == R_X86_64_SIZE32
5034 || r_type == R_X86_64_SIZE64))
5036 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5037 && !resolved_to_zero)
5038 || h->root.type != bfd_link_hash_undefweak))
5039 && ((! IS_X86_64_PCREL_TYPE (r_type)
5040 && r_type != R_X86_64_SIZE32
5041 && r_type != R_X86_64_SIZE64)
5042 || ! SYMBOL_CALLS_LOCAL (info, h)))
5043 || (ELIMINATE_COPY_RELOCS
5044 && !bfd_link_pic (info)
5048 || eh->func_pointer_refcount > 0
5049 || (h->root.type == bfd_link_hash_undefweak
5050 && !resolved_to_zero))
5051 && ((h->def_dynamic && !h->def_regular)
5052 /* Undefined weak symbol is bound locally when
5054 || h->root.type == bfd_link_hash_undefined)))
5056 Elf_Internal_Rela outrel;
5057 bfd_boolean skip, relocate;
5060 /* When generating a shared object, these relocations
5061 are copied into the output file to be resolved at run
5067 _bfd_elf_section_offset (output_bfd, info, input_section,
5069 if (outrel.r_offset == (bfd_vma) -1)
5071 else if (outrel.r_offset == (bfd_vma) -2)
5072 skip = TRUE, relocate = TRUE;
5074 outrel.r_offset += (input_section->output_section->vma
5075 + input_section->output_offset);
5078 memset (&outrel, 0, sizeof outrel);
5080 /* h->dynindx may be -1 if this symbol was marked to
5084 && (IS_X86_64_PCREL_TYPE (r_type)
5085 || !(bfd_link_executable (info)
5086 || SYMBOLIC_BIND (info, h))
5087 || ! h->def_regular))
5089 outrel.r_info = htab->r_info (h->dynindx, r_type);
5090 outrel.r_addend = rel->r_addend;
5094 /* This symbol is local, or marked to become local.
5095 When relocation overflow check is disabled, we
5096 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
5097 if (r_type == htab->pointer_r_type
5098 || (r_type == R_X86_64_32
5099 && info->no_reloc_overflow_check))
5102 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
5103 outrel.r_addend = relocation + rel->r_addend;
5105 else if (r_type == R_X86_64_64
5106 && !ABI_64_P (output_bfd))
5109 outrel.r_info = htab->r_info (0,
5110 R_X86_64_RELATIVE64);
5111 outrel.r_addend = relocation + rel->r_addend;
5112 /* Check addend overflow. */
5113 if ((outrel.r_addend & 0x80000000)
5114 != (rel->r_addend & 0x80000000))
5117 int addend = rel->r_addend;
5118 if (h && h->root.root.string)
5119 name = h->root.root.string;
5121 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
5124 /* xgettext:c-format */
5125 (_("%B: addend %s%#x in relocation %s against "
5126 "symbol `%s' at %#Lx in section `%A' is "
5128 input_bfd, addend < 0 ? "-" : "", addend,
5129 howto->name, name, rel->r_offset, input_section);
5130 bfd_set_error (bfd_error_bad_value);
5138 if (bfd_is_abs_section (sec))
5140 else if (sec == NULL || sec->owner == NULL)
5142 bfd_set_error (bfd_error_bad_value);
5149 /* We are turning this relocation into one
5150 against a section symbol. It would be
5151 proper to subtract the symbol's value,
5152 osec->vma, from the emitted reloc addend,
5153 but ld.so expects buggy relocs. */
5154 osec = sec->output_section;
5155 sindx = elf_section_data (osec)->dynindx;
5158 asection *oi = htab->elf.text_index_section;
5159 sindx = elf_section_data (oi)->dynindx;
5161 BFD_ASSERT (sindx != 0);
5164 outrel.r_info = htab->r_info (sindx, r_type);
5165 outrel.r_addend = relocation + rel->r_addend;
5169 sreloc = elf_section_data (input_section)->sreloc;
5171 if (sreloc == NULL || sreloc->contents == NULL)
5173 r = bfd_reloc_notsupported;
5174 goto check_relocation_error;
5177 elf_append_rela (output_bfd, sreloc, &outrel);
5179 /* If this reloc is against an external symbol, we do
5180 not want to fiddle with the addend. Otherwise, we
5181 need to include the symbol value so that it becomes
5182 an addend for the dynamic reloc. */
5189 case R_X86_64_TLSGD:
5190 case R_X86_64_GOTPC32_TLSDESC:
5191 case R_X86_64_TLSDESC_CALL:
5192 case R_X86_64_GOTTPOFF:
5193 tls_type = GOT_UNKNOWN;
5194 if (h == NULL && local_got_offsets)
5195 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
5197 tls_type = elf_x86_64_hash_entry (h)->tls_type;
5199 if (! elf_x86_64_tls_transition (info, input_bfd,
5200 input_section, contents,
5201 symtab_hdr, sym_hashes,
5202 &r_type, tls_type, rel,
5203 relend, h, r_symndx, TRUE))
5206 if (r_type == R_X86_64_TPOFF32)
5208 bfd_vma roff = rel->r_offset;
5210 BFD_ASSERT (! unresolved_reloc);
5212 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5214 /* GD->LE transition. For 64bit, change
5215 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5216 .word 0x6666; rex64; call __tls_get_addr@PLT
5218 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5220 call *__tls_get_addr@GOTPCREL(%rip)
5221 which may be converted to
5222 addr32 call __tls_get_addr
5225 leaq foo@tpoff(%rax), %rax
5227 leaq foo@tlsgd(%rip), %rdi
5228 .word 0x6666; rex64; call __tls_get_addr@PLT
5230 leaq foo@tlsgd(%rip), %rdi
5232 call *__tls_get_addr@GOTPCREL(%rip)
5233 which may be converted to
5234 addr32 call __tls_get_addr
5237 leaq foo@tpoff(%rax), %rax
5238 For largepic, change:
5239 leaq foo@tlsgd(%rip), %rdi
5240 movabsq $__tls_get_addr@pltoff, %rax
5245 leaq foo@tpoff(%rax), %rax
5246 nopw 0x0(%rax,%rax,1) */
5248 if (ABI_64_P (output_bfd))
5250 if (contents[roff + 5] == 0xb8)
5252 memcpy (contents + roff - 3,
5253 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
5254 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5258 memcpy (contents + roff - 4,
5259 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5263 memcpy (contents + roff - 3,
5264 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5266 bfd_put_32 (output_bfd,
5267 elf_x86_64_tpoff (info, relocation),
5268 contents + roff + 8 + largepic);
5269 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
5270 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
5275 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5277 /* GDesc -> LE transition.
5278 It's originally something like:
5279 leaq x@tlsdesc(%rip), %rax
5282 movl $x@tpoff, %rax. */
5284 unsigned int val, type;
5286 type = bfd_get_8 (input_bfd, contents + roff - 3);
5287 val = bfd_get_8 (input_bfd, contents + roff - 1);
5288 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
5289 contents + roff - 3);
5290 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
5291 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
5292 contents + roff - 1);
5293 bfd_put_32 (output_bfd,
5294 elf_x86_64_tpoff (info, relocation),
5298 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5300 /* GDesc -> LE transition.
5305 bfd_put_8 (output_bfd, 0x66, contents + roff);
5306 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5309 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
5311 /* IE->LE transition:
5312 For 64bit, originally it can be one of:
5313 movq foo@gottpoff(%rip), %reg
5314 addq foo@gottpoff(%rip), %reg
5317 leaq foo(%reg), %reg
5319 For 32bit, originally it can be one of:
5320 movq foo@gottpoff(%rip), %reg
5321 addl foo@gottpoff(%rip), %reg
5324 leal foo(%reg), %reg
5327 unsigned int val, type, reg;
5330 val = bfd_get_8 (input_bfd, contents + roff - 3);
5333 type = bfd_get_8 (input_bfd, contents + roff - 2);
5334 reg = bfd_get_8 (input_bfd, contents + roff - 1);
5340 bfd_put_8 (output_bfd, 0x49,
5341 contents + roff - 3);
5342 else if (!ABI_64_P (output_bfd) && val == 0x44)
5343 bfd_put_8 (output_bfd, 0x41,
5344 contents + roff - 3);
5345 bfd_put_8 (output_bfd, 0xc7,
5346 contents + roff - 2);
5347 bfd_put_8 (output_bfd, 0xc0 | reg,
5348 contents + roff - 1);
5352 /* addq/addl -> addq/addl - addressing with %rsp/%r12
5355 bfd_put_8 (output_bfd, 0x49,
5356 contents + roff - 3);
5357 else if (!ABI_64_P (output_bfd) && val == 0x44)
5358 bfd_put_8 (output_bfd, 0x41,
5359 contents + roff - 3);
5360 bfd_put_8 (output_bfd, 0x81,
5361 contents + roff - 2);
5362 bfd_put_8 (output_bfd, 0xc0 | reg,
5363 contents + roff - 1);
5367 /* addq/addl -> leaq/leal */
5369 bfd_put_8 (output_bfd, 0x4d,
5370 contents + roff - 3);
5371 else if (!ABI_64_P (output_bfd) && val == 0x44)
5372 bfd_put_8 (output_bfd, 0x45,
5373 contents + roff - 3);
5374 bfd_put_8 (output_bfd, 0x8d,
5375 contents + roff - 2);
5376 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
5377 contents + roff - 1);
5379 bfd_put_32 (output_bfd,
5380 elf_x86_64_tpoff (info, relocation),
5388 if (htab->elf.sgot == NULL)
5393 off = h->got.offset;
5394 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
5398 if (local_got_offsets == NULL)
5401 off = local_got_offsets[r_symndx];
5402 offplt = local_tlsdesc_gotents[r_symndx];
5409 Elf_Internal_Rela outrel;
5413 if (htab->elf.srelgot == NULL)
5416 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5418 if (GOT_TLS_GDESC_P (tls_type))
5420 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
5421 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
5422 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
5423 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
5424 + htab->elf.sgotplt->output_offset
5426 + htab->sgotplt_jump_table_size);
5427 sreloc = htab->elf.srelplt;
5429 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5431 outrel.r_addend = 0;
5432 elf_append_rela (output_bfd, sreloc, &outrel);
5435 sreloc = htab->elf.srelgot;
5437 outrel.r_offset = (htab->elf.sgot->output_section->vma
5438 + htab->elf.sgot->output_offset + off);
5440 if (GOT_TLS_GD_P (tls_type))
5441 dr_type = R_X86_64_DTPMOD64;
5442 else if (GOT_TLS_GDESC_P (tls_type))
5445 dr_type = R_X86_64_TPOFF64;
5447 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
5448 outrel.r_addend = 0;
5449 if ((dr_type == R_X86_64_TPOFF64
5450 || dr_type == R_X86_64_TLSDESC) && indx == 0)
5451 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5452 outrel.r_info = htab->r_info (indx, dr_type);
5454 elf_append_rela (output_bfd, sreloc, &outrel);
5456 if (GOT_TLS_GD_P (tls_type))
5460 BFD_ASSERT (! unresolved_reloc);
5461 bfd_put_64 (output_bfd,
5462 relocation - elf_x86_64_dtpoff_base (info),
5463 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5467 bfd_put_64 (output_bfd, 0,
5468 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5469 outrel.r_info = htab->r_info (indx,
5471 outrel.r_offset += GOT_ENTRY_SIZE;
5472 elf_append_rela (output_bfd, sreloc,
5481 local_got_offsets[r_symndx] |= 1;
5484 if (off >= (bfd_vma) -2
5485 && ! GOT_TLS_GDESC_P (tls_type))
5487 if (r_type == ELF32_R_TYPE (rel->r_info))
5489 if (r_type == R_X86_64_GOTPC32_TLSDESC
5490 || r_type == R_X86_64_TLSDESC_CALL)
5491 relocation = htab->elf.sgotplt->output_section->vma
5492 + htab->elf.sgotplt->output_offset
5493 + offplt + htab->sgotplt_jump_table_size;
5495 relocation = htab->elf.sgot->output_section->vma
5496 + htab->elf.sgot->output_offset + off;
5497 unresolved_reloc = FALSE;
5501 bfd_vma roff = rel->r_offset;
5503 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5505 /* GD->IE transition. For 64bit, change
5506 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5507 .word 0x6666; rex64; call __tls_get_addr@PLT
5509 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5511 call *__tls_get_addr@GOTPCREL(%rip
5512 which may be converted to
5513 addr32 call __tls_get_addr
5516 addq foo@gottpoff(%rip), %rax
5518 leaq foo@tlsgd(%rip), %rdi
5519 .word 0x6666; rex64; call __tls_get_addr@PLT
5521 leaq foo@tlsgd(%rip), %rdi
5523 call *__tls_get_addr@GOTPCREL(%rip)
5524 which may be converted to
5525 addr32 call __tls_get_addr
5528 addq foo@gottpoff(%rip), %rax
5529 For largepic, change:
5530 leaq foo@tlsgd(%rip), %rdi
5531 movabsq $__tls_get_addr@pltoff, %rax
5536 addq foo@gottpoff(%rax), %rax
5537 nopw 0x0(%rax,%rax,1) */
5539 if (ABI_64_P (output_bfd))
5541 if (contents[roff + 5] == 0xb8)
5543 memcpy (contents + roff - 3,
5544 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
5545 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5549 memcpy (contents + roff - 4,
5550 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5554 memcpy (contents + roff - 3,
5555 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5558 relocation = (htab->elf.sgot->output_section->vma
5559 + htab->elf.sgot->output_offset + off
5562 - input_section->output_section->vma
5563 - input_section->output_offset
5565 bfd_put_32 (output_bfd, relocation,
5566 contents + roff + 8 + largepic);
5567 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
5572 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5574 /* GDesc -> IE transition.
5575 It's originally something like:
5576 leaq x@tlsdesc(%rip), %rax
5579 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
5581 /* Now modify the instruction as appropriate. To
5582 turn a leaq into a movq in the form we use it, it
5583 suffices to change the second byte from 0x8d to
5585 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5587 bfd_put_32 (output_bfd,
5588 htab->elf.sgot->output_section->vma
5589 + htab->elf.sgot->output_offset + off
5591 - input_section->output_section->vma
5592 - input_section->output_offset
5597 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5599 /* GDesc -> IE transition.
5606 bfd_put_8 (output_bfd, 0x66, contents + roff);
5607 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5615 case R_X86_64_TLSLD:
5616 if (! elf_x86_64_tls_transition (info, input_bfd,
5617 input_section, contents,
5618 symtab_hdr, sym_hashes,
5619 &r_type, GOT_UNKNOWN, rel,
5620 relend, h, r_symndx, TRUE))
5623 if (r_type != R_X86_64_TLSLD)
5625 /* LD->LE transition:
5626 leaq foo@tlsld(%rip), %rdi
5627 call __tls_get_addr@PLT
5628 For 64bit, we change it into:
5629 .word 0x6666; .byte 0x66; movq %fs:0, %rax
5630 For 32bit, we change it into:
5631 nopl 0x0(%rax); movl %fs:0, %eax
5633 leaq foo@tlsld(%rip), %rdi;
5634 call *__tls_get_addr@GOTPCREL(%rip)
5635 which may be converted to
5636 addr32 call __tls_get_addr
5637 For 64bit, we change it into:
5638 .word 0x6666; .word 0x6666; movq %fs:0, %rax
5639 For 32bit, we change it into:
5640 nopw 0x0(%rax); movl %fs:0, %eax
5641 For largepic, change:
5642 leaq foo@tlsgd(%rip), %rdi
5643 movabsq $__tls_get_addr@pltoff, %rax
5647 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
5650 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5651 if (ABI_64_P (output_bfd))
5653 if (contents[rel->r_offset + 5] == 0xb8)
5654 memcpy (contents + rel->r_offset - 3,
5655 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5656 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5657 else if (contents[rel->r_offset + 4] == 0xff
5658 || contents[rel->r_offset + 4] == 0x67)
5659 memcpy (contents + rel->r_offset - 3,
5660 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
5663 memcpy (contents + rel->r_offset - 3,
5664 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5668 if (contents[rel->r_offset + 4] == 0xff)
5669 memcpy (contents + rel->r_offset - 3,
5670 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
5673 memcpy (contents + rel->r_offset - 3,
5674 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5676 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
5677 and R_X86_64_PLTOFF64. */
5683 if (htab->elf.sgot == NULL)
5686 off = htab->tls_ld_got.offset;
5691 Elf_Internal_Rela outrel;
5693 if (htab->elf.srelgot == NULL)
5696 outrel.r_offset = (htab->elf.sgot->output_section->vma
5697 + htab->elf.sgot->output_offset + off);
5699 bfd_put_64 (output_bfd, 0,
5700 htab->elf.sgot->contents + off);
5701 bfd_put_64 (output_bfd, 0,
5702 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5703 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
5704 outrel.r_addend = 0;
5705 elf_append_rela (output_bfd, htab->elf.srelgot,
5707 htab->tls_ld_got.offset |= 1;
5709 relocation = htab->elf.sgot->output_section->vma
5710 + htab->elf.sgot->output_offset + off;
5711 unresolved_reloc = FALSE;
5714 case R_X86_64_DTPOFF32:
5715 if (!bfd_link_executable (info)
5716 || (input_section->flags & SEC_CODE) == 0)
5717 relocation -= elf_x86_64_dtpoff_base (info);
5719 relocation = elf_x86_64_tpoff (info, relocation);
5722 case R_X86_64_TPOFF32:
5723 case R_X86_64_TPOFF64:
5724 BFD_ASSERT (bfd_link_executable (info));
5725 relocation = elf_x86_64_tpoff (info, relocation);
5728 case R_X86_64_DTPOFF64:
5729 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
5730 relocation -= elf_x86_64_dtpoff_base (info);
5737 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5738 because such sections are not SEC_ALLOC and thus ld.so will
5739 not process them. */
5740 if (unresolved_reloc
5741 && !((input_section->flags & SEC_DEBUGGING) != 0
5743 && _bfd_elf_section_offset (output_bfd, info, input_section,
5744 rel->r_offset) != (bfd_vma) -1)
5749 sec = h->root.u.def.section;
5750 if ((info->nocopyreloc
5751 || (eh->def_protected
5752 && elf_has_no_copy_on_protected (h->root.u.def.section->owner)))
5753 && !(h->root.u.def.section->flags & SEC_CODE))
5754 return elf_x86_64_need_pic (info, input_bfd, input_section,
5755 h, NULL, NULL, howto);
5760 /* xgettext:c-format */
5761 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
5766 h->root.root.string);
5772 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5773 contents, rel->r_offset,
5774 relocation, rel->r_addend);
5776 check_relocation_error:
5777 if (r != bfd_reloc_ok)
5782 name = h->root.root.string;
5785 name = bfd_elf_string_from_elf_section (input_bfd,
5786 symtab_hdr->sh_link,
5791 name = bfd_section_name (input_bfd, sec);
5794 if (r == bfd_reloc_overflow)
5795 (*info->callbacks->reloc_overflow)
5796 (info, (h ? &h->root : NULL), name, howto->name,
5797 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5801 /* xgettext:c-format */
5802 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
5803 input_bfd, input_section,
5804 rel->r_offset, name, (int) r);
5815 Elf_Internal_Shdr *rel_hdr;
5816 size_t deleted = rel - wrel;
5818 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5819 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5820 if (rel_hdr->sh_size == 0)
5822 /* It is too late to remove an empty reloc section. Leave
5824 ??? What is wrong with an empty section??? */
5825 rel_hdr->sh_size = rel_hdr->sh_entsize;
5828 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5829 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5830 input_section->reloc_count -= deleted;
5836 /* Finish up dynamic symbol handling. We set the contents of various
5837 dynamic sections here. */
5840 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
5841 struct bfd_link_info *info,
5842 struct elf_link_hash_entry *h,
5843 Elf_Internal_Sym *sym)
5845 struct elf_x86_64_link_hash_table *htab;
5846 bfd_boolean use_plt_second;
5847 struct elf_x86_64_link_hash_entry *eh;
5848 bfd_boolean local_undefweak;
5850 htab = elf_x86_64_hash_table (info);
5854 /* Use the second PLT section only if there is .plt section. */
5855 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
5857 eh = (struct elf_x86_64_link_hash_entry *) h;
5858 if (eh->no_finish_dynamic_symbol)
5861 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5862 resolved undefined weak symbols in executable so that their
5863 references have value 0 at run-time. */
5864 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
5868 if (h->plt.offset != (bfd_vma) -1)
5871 bfd_vma got_offset, plt_offset;
5872 Elf_Internal_Rela rela;
5874 asection *plt, *gotplt, *relplt, *resolved_plt;
5875 const struct elf_backend_data *bed;
5876 bfd_vma plt_got_pcrel_offset;
5878 /* When building a static executable, use .iplt, .igot.plt and
5879 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5880 if (htab->elf.splt != NULL)
5882 plt = htab->elf.splt;
5883 gotplt = htab->elf.sgotplt;
5884 relplt = htab->elf.srelplt;
5888 plt = htab->elf.iplt;
5889 gotplt = htab->elf.igotplt;
5890 relplt = htab->elf.irelplt;
5893 /* This symbol has an entry in the procedure linkage table. Set
5895 if ((h->dynindx == -1
5897 && !((h->forced_local || bfd_link_executable (info))
5899 && h->type == STT_GNU_IFUNC))
5905 /* Get the index in the procedure linkage table which
5906 corresponds to this symbol. This is the index of this symbol
5907 in all the symbols for which we are making plt entries. The
5908 first entry in the procedure linkage table is reserved.
5910 Get the offset into the .got table of the entry that
5911 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5912 bytes. The first three are reserved for the dynamic linker.
5914 For static executables, we don't reserve anything. */
5916 if (plt == htab->elf.splt)
5918 got_offset = (h->plt.offset / htab->plt.plt_entry_size
5919 - htab->plt.has_plt0);
5920 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
5924 got_offset = h->plt.offset / htab->plt.plt_entry_size;
5925 got_offset = got_offset * GOT_ENTRY_SIZE;
5928 /* Fill in the entry in the procedure linkage table. */
5929 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
5930 htab->plt.plt_entry_size);
5933 memcpy (htab->plt_second->contents + eh->plt_second.offset,
5934 htab->non_lazy_plt->plt_entry,
5935 htab->non_lazy_plt->plt_entry_size);
5937 resolved_plt = htab->plt_second;
5938 plt_offset = eh->plt_second.offset;
5943 plt_offset = h->plt.offset;
5946 /* Insert the relocation positions of the plt section. */
5948 /* Put offset the PC-relative instruction referring to the GOT entry,
5949 subtracting the size of that instruction. */
5950 plt_got_pcrel_offset = (gotplt->output_section->vma
5951 + gotplt->output_offset
5953 - resolved_plt->output_section->vma
5954 - resolved_plt->output_offset
5956 - htab->plt.plt_got_insn_size);
5958 /* Check PC-relative offset overflow in PLT entry. */
5959 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
5960 /* xgettext:c-format */
5961 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5962 output_bfd, h->root.root.string);
5964 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
5965 (resolved_plt->contents + plt_offset
5966 + htab->plt.plt_got_offset));
5968 /* Fill in the entry in the global offset table, initially this
5969 points to the second part of the PLT entry. Leave the entry
5970 as zero for undefined weak symbol in PIE. No PLT relocation
5971 against undefined weak symbol in PIE. */
5972 if (!local_undefweak)
5974 if (htab->plt.has_plt0)
5975 bfd_put_64 (output_bfd, (plt->output_section->vma
5976 + plt->output_offset
5978 + htab->lazy_plt->plt_lazy_offset),
5979 gotplt->contents + got_offset);
5981 /* Fill in the entry in the .rela.plt section. */
5982 rela.r_offset = (gotplt->output_section->vma
5983 + gotplt->output_offset
5985 if (h->dynindx == -1
5986 || ((bfd_link_executable (info)
5987 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5989 && h->type == STT_GNU_IFUNC))
5991 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5992 h->root.root.string,
5993 h->root.u.def.section->owner);
5995 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5996 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5997 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
5998 rela.r_addend = (h->root.u.def.value
5999 + h->root.u.def.section->output_section->vma
6000 + h->root.u.def.section->output_offset);
6001 /* R_X86_64_IRELATIVE comes last. */
6002 plt_index = htab->next_irelative_index--;
6006 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
6008 plt_index = htab->next_jump_slot_index++;
6011 /* Don't fill the second and third slots in PLT entry for
6012 static executables nor without PLT0. */
6013 if (plt == htab->elf.splt && htab->plt.has_plt0)
6016 = h->plt.offset + htab->lazy_plt->plt_plt_insn_end;
6018 /* Put relocation index. */
6019 bfd_put_32 (output_bfd, plt_index,
6020 (plt->contents + h->plt.offset
6021 + htab->lazy_plt->plt_reloc_offset));
6023 /* Put offset for jmp .PLT0 and check for overflow. We don't
6024 check relocation index for overflow since branch displacement
6025 will overflow first. */
6026 if (plt0_offset > 0x80000000)
6027 /* xgettext:c-format */
6028 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
6029 output_bfd, h->root.root.string);
6030 bfd_put_32 (output_bfd, - plt0_offset,
6031 (plt->contents + h->plt.offset
6032 + htab->lazy_plt->plt_plt_offset));
6035 bed = get_elf_backend_data (output_bfd);
6036 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
6037 bed->s->swap_reloca_out (output_bfd, &rela, loc);
6040 else if (eh->plt_got.offset != (bfd_vma) -1)
6042 bfd_vma got_offset, plt_offset;
6043 asection *plt, *got;
6044 bfd_boolean got_after_plt;
6045 int32_t got_pcrel_offset;
6047 /* Set the entry in the GOT procedure linkage table. */
6048 plt = htab->plt_got;
6049 got = htab->elf.sgot;
6050 got_offset = h->got.offset;
6052 if (got_offset == (bfd_vma) -1
6053 || (h->type == STT_GNU_IFUNC && h->def_regular)
6058 /* Use the non-lazy PLT entry template for the GOT PLT since they
6059 are the identical. */
6060 /* Fill in the entry in the GOT procedure linkage table. */
6061 plt_offset = eh->plt_got.offset;
6062 memcpy (plt->contents + plt_offset,
6063 htab->non_lazy_plt->plt_entry,
6064 htab->non_lazy_plt->plt_entry_size);
6066 /* Put offset the PC-relative instruction referring to the GOT
6067 entry, subtracting the size of that instruction. */
6068 got_pcrel_offset = (got->output_section->vma
6069 + got->output_offset
6071 - plt->output_section->vma
6072 - plt->output_offset
6074 - htab->non_lazy_plt->plt_got_insn_size);
6076 /* Check PC-relative offset overflow in GOT PLT entry. */
6077 got_after_plt = got->output_section->vma > plt->output_section->vma;
6078 if ((got_after_plt && got_pcrel_offset < 0)
6079 || (!got_after_plt && got_pcrel_offset > 0))
6080 /* xgettext:c-format */
6081 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
6082 output_bfd, h->root.root.string);
6084 bfd_put_32 (output_bfd, got_pcrel_offset,
6085 (plt->contents + plt_offset
6086 + htab->non_lazy_plt->plt_got_offset));
6089 if (!local_undefweak
6091 && (h->plt.offset != (bfd_vma) -1
6092 || eh->plt_got.offset != (bfd_vma) -1))
6094 /* Mark the symbol as undefined, rather than as defined in
6095 the .plt section. Leave the value if there were any
6096 relocations where pointer equality matters (this is a clue
6097 for the dynamic linker, to make function pointer
6098 comparisons work between an application and shared
6099 library), otherwise set it to zero. If a function is only
6100 called from a binary, there is no need to slow down
6101 shared libraries because of that. */
6102 sym->st_shndx = SHN_UNDEF;
6103 if (!h->pointer_equality_needed)
6107 /* Don't generate dynamic GOT relocation against undefined weak
6108 symbol in executable. */
6109 if (h->got.offset != (bfd_vma) -1
6110 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
6111 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE
6112 && !local_undefweak)
6114 Elf_Internal_Rela rela;
6115 asection *relgot = htab->elf.srelgot;
6117 /* This symbol has an entry in the global offset table. Set it
6119 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
6122 rela.r_offset = (htab->elf.sgot->output_section->vma
6123 + htab->elf.sgot->output_offset
6124 + (h->got.offset &~ (bfd_vma) 1));
6126 /* If this is a static link, or it is a -Bsymbolic link and the
6127 symbol is defined locally or was forced to be local because
6128 of a version file, we just want to emit a RELATIVE reloc.
6129 The entry in the global offset table will already have been
6130 initialized in the relocate_section function. */
6132 && h->type == STT_GNU_IFUNC)
6134 if (h->plt.offset == (bfd_vma) -1)
6136 /* STT_GNU_IFUNC is referenced without PLT. */
6137 if (htab->elf.splt == NULL)
6139 /* use .rel[a].iplt section to store .got relocations
6140 in static executable. */
6141 relgot = htab->elf.irelplt;
6143 if (SYMBOL_REFERENCES_LOCAL (info, h))
6145 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
6147 h->root.root.string,
6148 h->root.u.def.section->owner);
6150 rela.r_info = htab->r_info (0,
6151 R_X86_64_IRELATIVE);
6152 rela.r_addend = (h->root.u.def.value
6153 + h->root.u.def.section->output_section->vma
6154 + h->root.u.def.section->output_offset);
6159 else if (bfd_link_pic (info))
6161 /* Generate R_X86_64_GLOB_DAT. */
6169 if (!h->pointer_equality_needed)
6172 /* For non-shared object, we can't use .got.plt, which
6173 contains the real function addres if we need pointer
6174 equality. We load the GOT entry with the PLT entry. */
6175 if (htab->plt_second != NULL)
6177 plt = htab->plt_second;
6178 plt_offset = eh->plt_second.offset;
6182 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
6183 plt_offset = h->plt.offset;
6185 bfd_put_64 (output_bfd, (plt->output_section->vma
6186 + plt->output_offset
6188 htab->elf.sgot->contents + h->got.offset);
6192 else if (bfd_link_pic (info)
6193 && SYMBOL_REFERENCES_LOCAL (info, h))
6195 if (!h->def_regular)
6197 BFD_ASSERT((h->got.offset & 1) != 0);
6198 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
6199 rela.r_addend = (h->root.u.def.value
6200 + h->root.u.def.section->output_section->vma
6201 + h->root.u.def.section->output_offset);
6205 BFD_ASSERT((h->got.offset & 1) == 0);
6207 bfd_put_64 (output_bfd, (bfd_vma) 0,
6208 htab->elf.sgot->contents + h->got.offset);
6209 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
6213 elf_append_rela (output_bfd, relgot, &rela);
6218 Elf_Internal_Rela rela;
6221 /* This symbol needs a copy reloc. Set it up. */
6223 if (h->dynindx == -1
6224 || (h->root.type != bfd_link_hash_defined
6225 && h->root.type != bfd_link_hash_defweak)
6226 || htab->elf.srelbss == NULL
6227 || htab->elf.sreldynrelro == NULL)
6230 rela.r_offset = (h->root.u.def.value
6231 + h->root.u.def.section->output_section->vma
6232 + h->root.u.def.section->output_offset);
6233 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
6235 if (h->root.u.def.section == htab->elf.sdynrelro)
6236 s = htab->elf.sreldynrelro;
6238 s = htab->elf.srelbss;
6239 elf_append_rela (output_bfd, s, &rela);
6245 /* Finish up local dynamic symbol handling. We set the contents of
6246 various dynamic sections here. */
6249 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
6251 struct elf_link_hash_entry *h
6252 = (struct elf_link_hash_entry *) *slot;
6253 struct bfd_link_info *info
6254 = (struct bfd_link_info *) inf;
6256 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
6260 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
6261 here since undefined weak symbol may not be dynamic and may not be
6262 called for elf_x86_64_finish_dynamic_symbol. */
6265 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
6268 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
6269 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6271 if (h->root.type != bfd_link_hash_undefweak
6272 || h->dynindx != -1)
6275 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
6279 /* Used to decide how to sort relocs in an optimal manner for the
6280 dynamic linker, before writing them out. */
6282 static enum elf_reloc_type_class
6283 elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
6284 const asection *rel_sec ATTRIBUTE_UNUSED,
6285 const Elf_Internal_Rela *rela)
6287 bfd *abfd = info->output_bfd;
6288 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6289 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
6291 if (htab->elf.dynsym != NULL
6292 && htab->elf.dynsym->contents != NULL)
6294 /* Check relocation against STT_GNU_IFUNC symbol if there are
6296 unsigned long r_symndx = htab->r_sym (rela->r_info);
6297 if (r_symndx != STN_UNDEF)
6299 Elf_Internal_Sym sym;
6300 if (!bed->s->swap_symbol_in (abfd,
6301 (htab->elf.dynsym->contents
6302 + r_symndx * bed->s->sizeof_sym),
6306 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
6307 return reloc_class_ifunc;
6311 switch ((int) ELF32_R_TYPE (rela->r_info))
6313 case R_X86_64_IRELATIVE:
6314 return reloc_class_ifunc;
6315 case R_X86_64_RELATIVE:
6316 case R_X86_64_RELATIVE64:
6317 return reloc_class_relative;
6318 case R_X86_64_JUMP_SLOT:
6319 return reloc_class_plt;
6321 return reloc_class_copy;
6323 return reloc_class_normal;
6327 /* Finish up the dynamic sections. */
6330 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
6331 struct bfd_link_info *info)
6333 struct elf_x86_64_link_hash_table *htab;
6337 htab = elf_x86_64_hash_table (info);
6341 dynobj = htab->elf.dynobj;
6342 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
6344 if (htab->elf.dynamic_sections_created)
6346 bfd_byte *dyncon, *dynconend;
6347 const struct elf_backend_data *bed;
6348 bfd_size_type sizeof_dyn;
6350 if (sdyn == NULL || htab->elf.sgot == NULL)
6353 bed = get_elf_backend_data (dynobj);
6354 sizeof_dyn = bed->s->sizeof_dyn;
6355 dyncon = sdyn->contents;
6356 dynconend = sdyn->contents + sdyn->size;
6357 for (; dyncon < dynconend; dyncon += sizeof_dyn)
6359 Elf_Internal_Dyn dyn;
6362 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
6370 s = htab->elf.sgotplt;
6371 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6375 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
6379 s = htab->elf.srelplt->output_section;
6380 dyn.d_un.d_val = s->size;
6383 case DT_TLSDESC_PLT:
6385 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6386 + htab->tlsdesc_plt;
6389 case DT_TLSDESC_GOT:
6391 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6392 + htab->tlsdesc_got;
6396 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
6399 if (htab->elf.splt && htab->elf.splt->size > 0)
6401 elf_section_data (htab->elf.splt->output_section)
6402 ->this_hdr.sh_entsize = htab->plt.plt_entry_size;
6404 if (htab->plt.has_plt0)
6406 /* Fill in the special first entry in the procedure linkage
6408 memcpy (htab->elf.splt->contents,
6409 htab->lazy_plt->plt0_entry,
6410 htab->lazy_plt->plt_entry_size);
6411 /* Add offset for pushq GOT+8(%rip), since the instruction
6412 uses 6 bytes subtract this value. */
6413 bfd_put_32 (output_bfd,
6414 (htab->elf.sgotplt->output_section->vma
6415 + htab->elf.sgotplt->output_offset
6417 - htab->elf.splt->output_section->vma
6418 - htab->elf.splt->output_offset
6420 (htab->elf.splt->contents
6421 + htab->lazy_plt->plt0_got1_offset));
6422 /* Add offset for the PC-relative instruction accessing
6423 GOT+16, subtracting the offset to the end of that
6425 bfd_put_32 (output_bfd,
6426 (htab->elf.sgotplt->output_section->vma
6427 + htab->elf.sgotplt->output_offset
6429 - htab->elf.splt->output_section->vma
6430 - htab->elf.splt->output_offset
6431 - htab->lazy_plt->plt0_got2_insn_end),
6432 (htab->elf.splt->contents
6433 + htab->lazy_plt->plt0_got2_offset));
6435 if (htab->tlsdesc_plt)
6437 bfd_put_64 (output_bfd, (bfd_vma) 0,
6438 htab->elf.sgot->contents + htab->tlsdesc_got);
6440 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
6441 htab->lazy_plt->plt0_entry,
6442 htab->lazy_plt->plt_entry_size);
6444 /* Add offset for pushq GOT+8(%rip), since the
6445 instruction uses 6 bytes subtract this value. */
6446 bfd_put_32 (output_bfd,
6447 (htab->elf.sgotplt->output_section->vma
6448 + htab->elf.sgotplt->output_offset
6450 - htab->elf.splt->output_section->vma
6451 - htab->elf.splt->output_offset
6454 (htab->elf.splt->contents
6456 + htab->lazy_plt->plt0_got1_offset));
6457 /* Add offset for the PC-relative instruction accessing
6458 GOT+TDG, where TDG stands for htab->tlsdesc_got,
6459 subtracting the offset to the end of that
6461 bfd_put_32 (output_bfd,
6462 (htab->elf.sgot->output_section->vma
6463 + htab->elf.sgot->output_offset
6465 - htab->elf.splt->output_section->vma
6466 - htab->elf.splt->output_offset
6468 - htab->lazy_plt->plt0_got2_insn_end),
6469 (htab->elf.splt->contents
6471 + htab->lazy_plt->plt0_got2_offset));
6477 if (htab->plt_got != NULL && htab->plt_got->size > 0)
6478 elf_section_data (htab->plt_got->output_section)
6479 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6481 if (htab->plt_second != NULL && htab->plt_second->size > 0)
6482 elf_section_data (htab->plt_second->output_section)
6483 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6485 /* GOT is always created in setup_gnu_properties. But it may not be
6487 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
6489 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
6492 (_("discarded output section: `%A'"), htab->elf.sgotplt);
6496 /* Set the first entry in the global offset table to the address of
6497 the dynamic section. */
6499 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
6501 bfd_put_64 (output_bfd,
6502 sdyn->output_section->vma + sdyn->output_offset,
6503 htab->elf.sgotplt->contents);
6504 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6505 bfd_put_64 (output_bfd, (bfd_vma) 0,
6506 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
6507 bfd_put_64 (output_bfd, (bfd_vma) 0,
6508 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
6510 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize
6514 /* Adjust .eh_frame for .plt section. */
6515 if (htab->plt_eh_frame != NULL
6516 && htab->plt_eh_frame->contents != NULL)
6518 if (htab->elf.splt != NULL
6519 && htab->elf.splt->size != 0
6520 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
6521 && htab->elf.splt->output_section != NULL
6522 && htab->plt_eh_frame->output_section != NULL)
6524 bfd_vma plt_start = htab->elf.splt->output_section->vma;
6525 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
6526 + htab->plt_eh_frame->output_offset
6527 + PLT_FDE_START_OFFSET;
6528 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6529 htab->plt_eh_frame->contents
6530 + PLT_FDE_START_OFFSET);
6532 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
6534 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6536 htab->plt_eh_frame->contents))
6541 /* Adjust .eh_frame for .plt.got section. */
6542 if (htab->plt_got_eh_frame != NULL
6543 && htab->plt_got_eh_frame->contents != NULL)
6545 if (htab->plt_got != NULL
6546 && htab->plt_got->size != 0
6547 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
6548 && htab->plt_got->output_section != NULL
6549 && htab->plt_got_eh_frame->output_section != NULL)
6551 bfd_vma plt_start = htab->plt_got->output_section->vma;
6552 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
6553 + htab->plt_got_eh_frame->output_offset
6554 + PLT_FDE_START_OFFSET;
6555 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6556 htab->plt_got_eh_frame->contents
6557 + PLT_FDE_START_OFFSET);
6559 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
6561 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6562 htab->plt_got_eh_frame,
6563 htab->plt_got_eh_frame->contents))
6568 /* Adjust .eh_frame for the second PLT section. */
6569 if (htab->plt_second_eh_frame != NULL
6570 && htab->plt_second_eh_frame->contents != NULL)
6572 if (htab->plt_second != NULL
6573 && htab->plt_second->size != 0
6574 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
6575 && htab->plt_second->output_section != NULL
6576 && htab->plt_second_eh_frame->output_section != NULL)
6578 bfd_vma plt_start = htab->plt_second->output_section->vma;
6579 bfd_vma eh_frame_start
6580 = (htab->plt_second_eh_frame->output_section->vma
6581 + htab->plt_second_eh_frame->output_offset
6582 + PLT_FDE_START_OFFSET);
6583 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6584 htab->plt_second_eh_frame->contents
6585 + PLT_FDE_START_OFFSET);
6587 if (htab->plt_second_eh_frame->sec_info_type
6588 == SEC_INFO_TYPE_EH_FRAME)
6590 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6591 htab->plt_second_eh_frame,
6592 htab->plt_second_eh_frame->contents))
6597 if (htab->elf.sgot && htab->elf.sgot->size > 0)
6598 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
6601 /* Fill PLT entries for undefined weak symbols in PIE. */
6602 if (bfd_link_pie (info))
6603 bfd_hash_traverse (&info->hash->table,
6604 elf_x86_64_pie_finish_undefweak_symbol,
6610 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6611 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6612 It has to be done before elf_link_sort_relocs is called so that
6613 dynamic relocations are properly sorted. */
6616 elf_x86_64_output_arch_local_syms
6617 (bfd *output_bfd ATTRIBUTE_UNUSED,
6618 struct bfd_link_info *info,
6619 void *flaginfo ATTRIBUTE_UNUSED,
6620 int (*func) (void *, const char *,
6623 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
6625 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
6629 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6630 htab_traverse (htab->loc_hash_table,
6631 elf_x86_64_finish_local_dynamic_symbol,
6637 /* Sort relocs into address order. */
6640 compare_relocs (const void *ap, const void *bp)
6642 const arelent *a = * (const arelent **) ap;
6643 const arelent *b = * (const arelent **) bp;
6645 if (a->address > b->address)
6647 else if (a->address < b->address)
6653 enum elf_x86_64_plt_type
6657 plt_second = 1 << 1,
6661 struct elf_x86_64_plt
6666 enum elf_x86_64_plt_type type;
6667 unsigned int plt_got_offset;
6668 unsigned int plt_got_insn_size;
6669 unsigned int plt_entry_size;
6673 /* Forward declaration. */
6674 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt;
6676 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
6677 dynamic relocations. */
6680 elf_x86_64_get_synthetic_symtab (bfd *abfd,
6681 long symcount ATTRIBUTE_UNUSED,
6682 asymbol **syms ATTRIBUTE_UNUSED,
6687 long size, count, i, n, len;
6689 unsigned int plt_got_offset, plt_entry_size, plt_got_insn_size;
6691 bfd_byte *plt_contents;
6692 long dynrelcount, relsize;
6693 arelent **dynrelbuf, *p;
6694 const struct elf_x86_64_lazy_plt_layout *lazy_plt;
6695 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt;
6696 const struct elf_x86_64_lazy_plt_layout *lazy_bnd_plt;
6697 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_bnd_plt;
6698 const struct elf_x86_64_lazy_plt_layout *lazy_ibt_plt;
6699 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_ibt_plt;
6702 enum elf_x86_64_plt_type plt_type;
6703 struct elf_x86_64_plt plts[] =
6705 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
6706 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
6707 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
6708 { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 },
6709 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
6714 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
6717 if (dynsymcount <= 0)
6720 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
6724 dynrelbuf = (arelent **) bfd_malloc (relsize);
6725 if (dynrelbuf == NULL)
6728 dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf,
6731 /* Sort the relocs by address. */
6732 qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs);
6734 if (get_elf_x86_64_backend_data (abfd)->os == is_normal)
6736 lazy_plt = &elf_x86_64_lazy_plt;
6737 non_lazy_plt = &elf_x86_64_non_lazy_plt;
6738 lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt;
6739 non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt;
6740 if (ABI_64_P (abfd))
6742 lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
6743 non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
6747 lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
6748 non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
6753 lazy_plt = &elf_x86_64_nacl_plt;
6754 non_lazy_plt = NULL;
6755 lazy_bnd_plt = NULL;
6756 non_lazy_bnd_plt = NULL;
6757 lazy_ibt_plt = NULL;
6758 non_lazy_ibt_plt = NULL;
6762 for (j = 0; plts[j].name != NULL; j++)
6764 plt = bfd_get_section_by_name (abfd, plts[j].name);
6768 /* Get the PLT section contents. */
6769 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6770 if (plt_contents == NULL)
6772 if (!bfd_get_section_contents (abfd, (asection *) plt,
6773 plt_contents, 0, plt->size))
6775 free (plt_contents);
6779 /* Check what kind of PLT it is. */
6780 plt_type = plt_unknown;
6781 if (plts[j].type == plt_unknown)
6783 /* Match lazy PLT first. Need to check the first two
6785 if ((memcmp (plt_contents, lazy_plt->plt0_entry,
6786 lazy_plt->plt0_got1_offset) == 0)
6787 && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6,
6789 plt_type = plt_lazy;
6790 else if (lazy_bnd_plt != NULL
6791 && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry,
6792 lazy_bnd_plt->plt0_got1_offset) == 0)
6793 && (memcmp (plt_contents + 6,
6794 lazy_bnd_plt->plt0_entry + 6, 3) == 0))
6796 plt_type = plt_lazy | plt_second;
6797 /* The fist entry in the lazy IBT PLT is the same as the
6799 if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size,
6800 lazy_ibt_plt->plt_entry,
6801 lazy_ibt_plt->plt_got_offset) == 0))
6802 lazy_plt = lazy_ibt_plt;
6804 lazy_plt = lazy_bnd_plt;
6808 if (non_lazy_plt != NULL
6809 && (plt_type == plt_unknown || plt_type == plt_non_lazy))
6811 /* Match non-lazy PLT. */
6812 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
6813 non_lazy_plt->plt_got_offset) == 0)
6814 plt_type = plt_non_lazy;
6817 if (plt_type == plt_unknown || plt_type == plt_second)
6819 if (non_lazy_bnd_plt != NULL
6820 && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry,
6821 non_lazy_bnd_plt->plt_got_offset) == 0))
6823 /* Match BND PLT. */
6824 plt_type = plt_second;
6825 non_lazy_plt = non_lazy_bnd_plt;
6827 else if (non_lazy_ibt_plt != NULL
6828 && (memcmp (plt_contents,
6829 non_lazy_ibt_plt->plt_entry,
6830 non_lazy_ibt_plt->plt_got_offset) == 0))
6832 /* Match IBT PLT. */
6833 plt_type = plt_second;
6834 non_lazy_plt = non_lazy_ibt_plt;
6838 if (plt_type == plt_unknown)
6842 plts[j].type = plt_type;
6844 if ((plt_type & plt_lazy))
6846 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
6847 plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size;
6848 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
6849 /* Skip PLT0 in lazy PLT. */
6854 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
6855 plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size;
6856 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
6860 /* Skip lazy PLT when the second PLT is used. */
6861 if (plt_type == (plt_lazy | plt_second))
6865 n = plt->size / plts[j].plt_entry_size;
6870 plts[j].contents = plt_contents;
6873 size = count * sizeof (asymbol);
6875 /* Allocate space for @plt suffixes. */
6877 for (i = 0; i < dynrelcount; i++)
6880 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
6882 size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd);
6885 s = *ret = (asymbol *) bfd_zmalloc (size);
6889 for (j = 0; plts[j].name != NULL; j++)
6890 if (plts[j].contents != NULL)
6891 free (plts[j].contents);
6896 /* Check for each PLT section. */
6897 names = (char *) (s + count);
6900 for (j = 0; plts[j].name != NULL; j++)
6901 if ((plt_contents = plts[j].contents) != NULL)
6906 plt_got_offset = plts[j].plt_got_offset;
6907 plt_got_insn_size = plts[j].plt_got_insn_size;
6908 plt_entry_size = plts[j].plt_entry_size;
6912 if ((plts[j].type & plt_lazy))
6914 /* Skip PLT0 in lazy PLT. */
6916 offset = plt_entry_size;
6924 /* Check each PLT entry against dynamic relocations. */
6925 for (; k < plts[j].count; k++)
6931 /* Get the PC-relative offset, a signed 32-bit integer. */
6932 off = H_GET_32 (abfd, (plt_contents + offset
6934 got_vma = plt->vma + offset + off + plt_got_insn_size;
6936 /* Binary search. */
6940 while ((min + 1) < max)
6944 mid = (min + max) / 2;
6946 if (got_vma > r->address)
6948 else if (got_vma < r->address)
6957 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6958 if (got_vma == p->address
6960 && (p->howto->type == R_X86_64_JUMP_SLOT
6961 || p->howto->type == R_X86_64_GLOB_DAT
6962 || p->howto->type == R_X86_64_IRELATIVE))
6964 *s = **p->sym_ptr_ptr;
6965 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6966 set. Since we are defining a symbol, ensure one
6968 if ((s->flags & BSF_LOCAL) == 0)
6969 s->flags |= BSF_GLOBAL;
6970 s->flags |= BSF_SYNTHETIC;
6971 /* This is no longer a section symbol. */
6972 s->flags &= ~BSF_SECTION_SYM;
6974 s->the_bfd = plt->owner;
6978 len = strlen ((*p->sym_ptr_ptr)->name);
6979 memcpy (names, (*p->sym_ptr_ptr)->name, len);
6985 memcpy (names, "+0x", sizeof ("+0x") - 1);
6986 names += sizeof ("+0x") - 1;
6987 bfd_sprintf_vma (abfd, buf, p->addend);
6988 for (a = buf; *a == '0'; ++a)
6991 memcpy (names, a, size);
6994 memcpy (names, "@plt", sizeof ("@plt"));
6995 names += sizeof ("@plt");
6999 offset += plt_entry_size;
7003 /* PLT entries with R_X86_64_TLSDESC relocations are skipped. */
7009 for (j = 0; plts[j].name != NULL; j++)
7010 if (plts[j].contents != NULL)
7011 free (plts[j].contents);
7018 /* Handle an x86-64 specific section when reading an object file. This
7019 is called when elfcode.h finds a section with an unknown type. */
7022 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
7023 const char *name, int shindex)
7025 if (hdr->sh_type != SHT_X86_64_UNWIND)
7028 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
7034 /* Hook called by the linker routine which adds symbols from an object
7035 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
7039 elf_x86_64_add_symbol_hook (bfd *abfd,
7040 struct bfd_link_info *info ATTRIBUTE_UNUSED,
7041 Elf_Internal_Sym *sym,
7042 const char **namep ATTRIBUTE_UNUSED,
7043 flagword *flagsp ATTRIBUTE_UNUSED,
7049 switch (sym->st_shndx)
7051 case SHN_X86_64_LCOMMON:
7052 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
7055 lcomm = bfd_make_section_with_flags (abfd,
7059 | SEC_LINKER_CREATED));
7062 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
7065 *valp = sym->st_size;
7073 /* Given a BFD section, try to locate the corresponding ELF section
7077 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
7078 asection *sec, int *index_return)
7080 if (sec == &_bfd_elf_large_com_section)
7082 *index_return = SHN_X86_64_LCOMMON;
7088 /* Process a symbol. */
7091 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
7094 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
7096 switch (elfsym->internal_elf_sym.st_shndx)
7098 case SHN_X86_64_LCOMMON:
7099 asym->section = &_bfd_elf_large_com_section;
7100 asym->value = elfsym->internal_elf_sym.st_size;
7101 /* Common symbol doesn't set BSF_GLOBAL. */
7102 asym->flags &= ~BSF_GLOBAL;
7108 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
7110 return (sym->st_shndx == SHN_COMMON
7111 || sym->st_shndx == SHN_X86_64_LCOMMON);
7115 elf_x86_64_common_section_index (asection *sec)
7117 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
7120 return SHN_X86_64_LCOMMON;
7124 elf_x86_64_common_section (asection *sec)
7126 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
7127 return bfd_com_section_ptr;
7129 return &_bfd_elf_large_com_section;
7133 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
7134 const Elf_Internal_Sym *sym,
7139 const asection *oldsec)
7141 /* A normal common symbol and a large common symbol result in a
7142 normal common symbol. We turn the large common symbol into a
7145 && h->root.type == bfd_link_hash_common
7147 && bfd_is_com_section (*psec)
7150 if (sym->st_shndx == SHN_COMMON
7151 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
7153 h->root.u.c.p->section
7154 = bfd_make_section_old_way (oldbfd, "COMMON");
7155 h->root.u.c.p->section->flags = SEC_ALLOC;
7157 else if (sym->st_shndx == SHN_X86_64_LCOMMON
7158 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
7159 *psec = bfd_com_section_ptr;
7166 elf_x86_64_merge_symbol_attribute (struct elf_link_hash_entry *h,
7167 const Elf_Internal_Sym *isym,
7168 bfd_boolean definition,
7169 bfd_boolean dynamic ATTRIBUTE_UNUSED)
7173 struct elf_x86_64_link_hash_entry *eh
7174 = (struct elf_x86_64_link_hash_entry *) h;
7175 eh->def_protected = (ELF_ST_VISIBILITY (isym->st_other)
7181 elf_x86_64_additional_program_headers (bfd *abfd,
7182 struct bfd_link_info *info ATTRIBUTE_UNUSED)
7187 /* Check to see if we need a large readonly segment. */
7188 s = bfd_get_section_by_name (abfd, ".lrodata");
7189 if (s && (s->flags & SEC_LOAD))
7192 /* Check to see if we need a large data segment. Since .lbss sections
7193 is placed right after the .bss section, there should be no need for
7194 a large data segment just because of .lbss. */
7195 s = bfd_get_section_by_name (abfd, ".ldata");
7196 if (s && (s->flags & SEC_LOAD))
7202 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7205 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
7207 if (h->plt.offset != (bfd_vma) -1
7209 && !h->pointer_equality_needed)
7212 return _bfd_elf_hash_symbol (h);
7215 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
7218 elf_x86_64_relocs_compatible (const bfd_target *input,
7219 const bfd_target *output)
7221 return ((xvec_get_elf_backend_data (input)->s->elfclass
7222 == xvec_get_elf_backend_data (output)->s->elfclass)
7223 && _bfd_elf_relocs_compatible (input, output));
7226 /* Parse x86-64 GNU properties. */
7228 static enum elf_property_kind
7229 elf_x86_64_parse_gnu_properties (bfd *abfd, unsigned int type,
7230 bfd_byte *ptr, unsigned int datasz)
7236 case GNU_PROPERTY_X86_ISA_1_USED:
7237 case GNU_PROPERTY_X86_ISA_1_NEEDED:
7238 case GNU_PROPERTY_X86_FEATURE_1_AND:
7242 ((type == GNU_PROPERTY_X86_ISA_1_USED
7243 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
7244 : (type == GNU_PROPERTY_X86_ISA_1_NEEDED
7245 ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>")
7246 : _("error: %B: <corrupt x86 feature size: 0x%x>"))),
7248 return property_corrupt;
7250 prop = _bfd_elf_get_property (abfd, type, datasz);
7251 /* Combine properties of the same type. */
7252 prop->u.number |= bfd_h_get_32 (abfd, ptr);
7253 prop->pr_kind = property_number;
7257 return property_ignored;
7260 return property_number;
7263 /* Merge x86-64 GNU property BPROP with APROP. If APROP isn't NULL,
7264 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
7265 should be merged with ABFD. */
7268 elf_x86_64_merge_gnu_properties (struct bfd_link_info *info,
7269 bfd *abfd ATTRIBUTE_UNUSED,
7270 elf_property *aprop,
7271 elf_property *bprop)
7273 unsigned int number, features;
7274 bfd_boolean updated = FALSE;
7275 unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
7279 case GNU_PROPERTY_X86_ISA_1_USED:
7280 case GNU_PROPERTY_X86_ISA_1_NEEDED:
7281 if (aprop != NULL && bprop != NULL)
7283 number = aprop->u.number;
7284 aprop->u.number = number | bprop->u.number;
7285 updated = number != (unsigned int) aprop->u.number;
7289 /* Return TRUE if APROP is NULL to indicate that BPROP should
7290 be added to ABFD. */
7291 updated = aprop == NULL;
7295 case GNU_PROPERTY_X86_FEATURE_1_AND:
7296 /* Only one of APROP and BPROP can be NULL:
7297 1. APROP & BPROP when both APROP and BPROP aren't NULL.
7298 2. If APROP is NULL, remove x86 feature.
7299 3. Otherwise, do nothing.
7301 if (aprop != NULL && bprop != NULL)
7305 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7307 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
7308 number = aprop->u.number;
7309 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
7310 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7311 aprop->u.number = (number & bprop->u.number) | features;
7312 updated = number != (unsigned int) aprop->u.number;
7313 /* Remove the property if all feature bits are cleared. */
7314 if (aprop->u.number == 0)
7315 aprop->pr_kind = property_remove;
7321 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7323 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
7326 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
7327 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7330 number = aprop->u.number;
7331 aprop->u.number = number | features;
7332 updated = number != (unsigned int) aprop->u.number;
7336 bprop->u.number |= features;
7340 else if (aprop != NULL)
7342 aprop->pr_kind = property_remove;
7349 /* Never should happen. */
7356 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
7357 with GNU properties if found. Otherwise, return NULL. */
7360 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info)
7362 bfd_boolean normal_target;
7363 bfd_boolean lazy_plt;
7364 asection *sec, *pltsec;
7366 bfd_boolean use_ibt_plt;
7367 unsigned int plt_alignment, features;
7368 struct elf_x86_64_link_hash_table *htab;
7375 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7377 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
7379 /* Find a normal input file with GNU property note. */
7380 for (pbfd = info->input_bfds;
7382 pbfd = pbfd->link.next)
7383 if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
7384 && bfd_count_sections (pbfd) != 0)
7388 if (elf_properties (pbfd) != NULL)
7392 if (ebfd != NULL && features)
7394 /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and
7395 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7396 prop = _bfd_elf_get_property (ebfd,
7397 GNU_PROPERTY_X86_FEATURE_1_AND,
7399 prop->u.number |= features;
7400 prop->pr_kind = property_number;
7402 /* Create the GNU property note section if needed. */
7405 sec = bfd_make_section_with_flags (ebfd,
7406 NOTE_GNU_PROPERTY_SECTION_NAME,
7414 info->callbacks->einfo (_("%F: failed to create GNU property section\n"));
7416 if (!bfd_set_section_alignment (ebfd, sec,
7417 ABI_64_P (ebfd) ? 3 : 2))
7420 info->callbacks->einfo (_("%F%A: failed to align section\n"),
7424 elf_section_type (sec) = SHT_NOTE;
7428 pbfd = _bfd_elf_link_setup_gnu_properties (info);
7430 if (bfd_link_relocatable (info))
7433 htab = elf_x86_64_hash_table (info);
7437 use_ibt_plt = info->ibtplt || info->ibt;
7438 if (!use_ibt_plt && pbfd != NULL)
7440 /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */
7441 elf_property_list *p;
7443 /* The property list is sorted in order of type. */
7444 for (p = elf_properties (pbfd); p; p = p->next)
7446 if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type)
7448 use_ibt_plt = !!(p->property.u.number
7449 & GNU_PROPERTY_X86_FEATURE_1_IBT);
7452 else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type)
7457 dynobj = htab->elf.dynobj;
7459 /* Set htab->elf.dynobj here so that there is no need to check and
7460 set it in check_relocs. */
7465 htab->elf.dynobj = pbfd;
7472 /* Find a normal input file to hold linker created
7474 for (abfd = info->input_bfds;
7476 abfd = abfd->link.next)
7477 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
7479 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
7481 htab->elf.dynobj = abfd;
7488 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
7489 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
7490 canonical function address. */
7491 htab->plt.has_plt0 = 1;
7493 if (get_elf_x86_64_backend_data (info->output_bfd)->os
7498 if (ABI_64_P (dynobj))
7500 htab->lazy_plt = &elf_x86_64_lazy_ibt_plt;
7501 htab->non_lazy_plt = &elf_x86_64_non_lazy_ibt_plt;
7505 htab->lazy_plt = &elf_x32_lazy_ibt_plt;
7506 htab->non_lazy_plt = &elf_x32_non_lazy_ibt_plt;
7509 else if (info->bndplt)
7511 htab->lazy_plt = &elf_x86_64_lazy_bnd_plt;
7512 htab->non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt;
7516 htab->lazy_plt = &elf_x86_64_lazy_plt;
7517 htab->non_lazy_plt = &elf_x86_64_non_lazy_plt;
7519 normal_target = TRUE;
7523 htab->lazy_plt = &elf_x86_64_nacl_plt;
7524 htab->non_lazy_plt = NULL;
7525 normal_target = FALSE;
7528 pltsec = htab->elf.splt;
7530 /* If the non-lazy PLT is available, use it for all PLT entries if
7531 there are no PLT0 or no .plt section. */
7532 if (htab->non_lazy_plt != NULL
7533 && (!htab->plt.has_plt0 || pltsec == NULL))
7537 = htab->non_lazy_plt->plt_entry;
7538 htab->plt.plt_entry_size
7539 = htab->non_lazy_plt->plt_entry_size;
7540 htab->plt.plt_got_offset
7541 = htab->non_lazy_plt->plt_got_offset;
7542 htab->plt.plt_got_insn_size
7543 = htab->non_lazy_plt->plt_got_insn_size;
7544 htab->plt.eh_frame_plt_size
7545 = htab->non_lazy_plt->eh_frame_plt_size;
7546 htab->plt.eh_frame_plt
7547 = htab->non_lazy_plt->eh_frame_plt;
7553 = htab->lazy_plt->plt_entry;
7554 htab->plt.plt_entry_size
7555 = htab->lazy_plt->plt_entry_size;
7556 htab->plt.plt_got_offset
7557 = htab->lazy_plt->plt_got_offset;
7558 htab->plt.plt_got_insn_size
7559 = htab->lazy_plt->plt_got_insn_size;
7560 htab->plt.eh_frame_plt_size
7561 = htab->lazy_plt->eh_frame_plt_size;
7562 htab->plt.eh_frame_plt
7563 = htab->lazy_plt->eh_frame_plt;
7566 /* Return if there are no normal input files. */
7570 /* Since create_dynamic_sections isn't always called, but GOT
7571 relocations need GOT relocations, create them here so that we
7572 don't need to do it in check_relocs. */
7573 if (htab->elf.sgot == NULL
7574 && !_bfd_elf_create_got_section (dynobj, info))
7575 info->callbacks->einfo (_("%F: failed to create GOT sections\n"));
7577 /* Align .got and .got.plt sections to their entry size. Do it here
7578 instead of in create_dynamic_sections so that they are always
7579 properly aligned even if create_dynamic_sections isn't called. */
7580 sec = htab->elf.sgot;
7581 if (!bfd_set_section_alignment (dynobj, sec, 3))
7582 goto error_alignment;
7584 sec = htab->elf.sgotplt;
7585 if (!bfd_set_section_alignment (dynobj, sec, 3))
7586 goto error_alignment;
7588 /* Create the ifunc sections here so that check_relocs can be
7590 if (!_bfd_elf_create_ifunc_sections (dynobj, info))
7591 info->callbacks->einfo (_("%F: failed to create ifunc sections\n"));
7593 plt_alignment = bfd_log2 (htab->plt.plt_entry_size);
7597 /* Whe creating executable, set the contents of the .interp
7598 section to the interpreter. */
7599 if (bfd_link_executable (info) && !info->nointerp)
7601 asection *s = bfd_get_linker_section (dynobj, ".interp");
7604 s->size = htab->dynamic_interpreter_size;
7605 s->contents = (unsigned char *) htab->dynamic_interpreter;
7609 /* Don't change PLT section alignment for NaCl since it uses
7610 64-byte PLT entry and sets PLT section alignment to 32
7611 bytes. Don't create additional PLT sections for NaCl. */
7614 const struct elf_backend_data *bed
7615 = get_elf_backend_data (dynobj);
7616 flagword pltflags = (bed->dynamic_sec_flags
7621 unsigned int non_lazy_plt_alignment
7622 = bfd_log2 (htab->non_lazy_plt->plt_entry_size);
7625 if (!bfd_set_section_alignment (sec->owner, sec,
7627 goto error_alignment;
7629 /* Create the GOT procedure linkage table. */
7630 sec = bfd_make_section_anyway_with_flags (dynobj,
7634 info->callbacks->einfo (_("%F: failed to create GOT PLT section\n"));
7636 if (!bfd_set_section_alignment (dynobj, sec,
7637 non_lazy_plt_alignment))
7638 goto error_alignment;
7640 htab->plt_got = sec;
7648 /* Create the second PLT for Intel IBT support. IBT
7649 PLT is supported only for non-NaCl target and is
7650 is needed only for lazy binding. */
7651 sec = bfd_make_section_anyway_with_flags (dynobj,
7655 info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n"));
7657 if (!bfd_set_section_alignment (dynobj, sec,
7659 goto error_alignment;
7661 else if (info->bndplt && ABI_64_P (dynobj))
7663 /* Create the second PLT for Intel MPX support. MPX
7664 PLT is supported only for non-NaCl target in 64-bit
7665 mode and is needed only for lazy binding. */
7666 sec = bfd_make_section_anyway_with_flags (dynobj,
7670 info->callbacks->einfo (_("%F: failed to create BND PLT section\n"));
7672 if (!bfd_set_section_alignment (dynobj, sec,
7673 non_lazy_plt_alignment))
7674 goto error_alignment;
7677 htab->plt_second = sec;
7681 if (!info->no_ld_generated_unwind_info)
7683 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
7684 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7685 | SEC_LINKER_CREATED);
7687 sec = bfd_make_section_anyway_with_flags (dynobj,
7691 info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n"));
7693 if (!bfd_set_section_alignment (dynobj, sec,
7694 ABI_64_P (dynobj) ? 3 : 2))
7695 goto error_alignment;
7697 htab->plt_eh_frame = sec;
7699 if (htab->plt_got != NULL)
7701 sec = bfd_make_section_anyway_with_flags (dynobj,
7705 info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
7707 if (!bfd_set_section_alignment (dynobj, sec,
7708 ABI_64_P (dynobj) ? 3 : 2))
7709 goto error_alignment;
7711 htab->plt_got_eh_frame = sec;
7714 if (htab->plt_second != NULL)
7716 sec = bfd_make_section_anyway_with_flags (dynobj,
7720 info->callbacks->einfo (_("%F: failed to create BND PLT .eh_frame section\n"));
7722 if (!bfd_set_section_alignment (dynobj, sec, 3))
7723 goto error_alignment;
7725 htab->plt_second_eh_frame = sec;
7732 /* The .iplt section is used for IFUNC symbols in static
7734 sec = htab->elf.iplt;
7736 && !bfd_set_section_alignment (sec->owner, sec,
7738 goto error_alignment;
7745 elf_x86_64_link_check_relocs (bfd *abfd, struct bfd_link_info *info)
7747 if (!bfd_link_relocatable (info))
7749 /* Check for __tls_get_addr reference. */
7750 struct elf_link_hash_entry *h;
7751 h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr",
7752 FALSE, FALSE, FALSE);
7754 ((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr = 1;
7757 /* Invoke the regular ELF backend linker to do all the work. */
7758 return _bfd_elf_link_check_relocs (abfd, info);
7761 static const struct bfd_elf_special_section
7762 elf_x86_64_special_sections[]=
7764 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7765 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
7766 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
7767 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7768 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7769 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
7770 { NULL, 0, 0, 0, 0 }
7773 #define TARGET_LITTLE_SYM x86_64_elf64_vec
7774 #define TARGET_LITTLE_NAME "elf64-x86-64"
7775 #define ELF_ARCH bfd_arch_i386
7776 #define ELF_TARGET_ID X86_64_ELF_DATA
7777 #define ELF_MACHINE_CODE EM_X86_64
7778 #define ELF_MAXPAGESIZE 0x200000
7779 #define ELF_MINPAGESIZE 0x1000
7780 #define ELF_COMMONPAGESIZE 0x1000
7782 #define elf_backend_can_gc_sections 1
7783 #define elf_backend_can_refcount 1
7784 #define elf_backend_want_got_plt 1
7785 #define elf_backend_plt_readonly 1
7786 #define elf_backend_want_plt_sym 0
7787 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
7788 #define elf_backend_rela_normal 1
7789 #define elf_backend_plt_alignment 4
7790 #define elf_backend_extern_protected_data 1
7791 #define elf_backend_caches_rawsize 1
7792 #define elf_backend_dtrel_excludes_plt 1
7793 #define elf_backend_want_dynrelro 1
7795 #define elf_info_to_howto elf_x86_64_info_to_howto
7797 #define bfd_elf64_bfd_link_hash_table_create \
7798 elf_x86_64_link_hash_table_create
7799 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
7800 #define bfd_elf64_bfd_reloc_name_lookup \
7801 elf_x86_64_reloc_name_lookup
7803 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
7804 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
7805 #define elf_backend_check_relocs elf_x86_64_check_relocs
7806 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
7807 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
7808 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
7809 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
7810 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
7811 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
7812 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
7813 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
7815 #define elf_backend_write_core_note elf_x86_64_write_core_note
7817 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
7818 #define elf_backend_relocate_section elf_x86_64_relocate_section
7819 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
7820 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
7821 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7822 #define elf_backend_object_p elf64_x86_64_elf_object_p
7823 #define bfd_elf64_mkobject elf_x86_64_mkobject
7824 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
7825 #define bfd_elf64_bfd_link_check_relocs elf_x86_64_link_check_relocs
7827 #define elf_backend_section_from_shdr \
7828 elf_x86_64_section_from_shdr
7830 #define elf_backend_section_from_bfd_section \
7831 elf_x86_64_elf_section_from_bfd_section
7832 #define elf_backend_add_symbol_hook \
7833 elf_x86_64_add_symbol_hook
7834 #define elf_backend_symbol_processing \
7835 elf_x86_64_symbol_processing
7836 #define elf_backend_common_section_index \
7837 elf_x86_64_common_section_index
7838 #define elf_backend_common_section \
7839 elf_x86_64_common_section
7840 #define elf_backend_common_definition \
7841 elf_x86_64_common_definition
7842 #define elf_backend_merge_symbol \
7843 elf_x86_64_merge_symbol
7844 #define elf_backend_merge_symbol_attribute \
7845 elf_x86_64_merge_symbol_attribute
7846 #define elf_backend_special_sections \
7847 elf_x86_64_special_sections
7848 #define elf_backend_additional_program_headers \
7849 elf_x86_64_additional_program_headers
7850 #define elf_backend_hash_symbol \
7851 elf_x86_64_hash_symbol
7852 #define elf_backend_omit_section_dynsym \
7853 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
7854 #define elf_backend_fixup_symbol \
7855 elf_x86_64_fixup_symbol
7856 #define elf_backend_parse_gnu_properties \
7857 elf_x86_64_parse_gnu_properties
7858 #define elf_backend_merge_gnu_properties \
7859 elf_x86_64_merge_gnu_properties
7860 #define elf_backend_setup_gnu_properties \
7861 elf_x86_64_link_setup_gnu_properties
7863 #include "elf64-target.h"
7865 /* CloudABI support. */
7867 #undef TARGET_LITTLE_SYM
7868 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
7869 #undef TARGET_LITTLE_NAME
7870 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
7873 #define ELF_OSABI ELFOSABI_CLOUDABI
7876 #define elf64_bed elf64_x86_64_cloudabi_bed
7878 #include "elf64-target.h"
7880 /* FreeBSD support. */
7882 #undef TARGET_LITTLE_SYM
7883 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
7884 #undef TARGET_LITTLE_NAME
7885 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
7888 #define ELF_OSABI ELFOSABI_FREEBSD
7891 #define elf64_bed elf64_x86_64_fbsd_bed
7893 #include "elf64-target.h"
7895 /* Solaris 2 support. */
7897 #undef TARGET_LITTLE_SYM
7898 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
7899 #undef TARGET_LITTLE_NAME
7900 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
7902 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
7903 objects won't be recognized. */
7907 #define elf64_bed elf64_x86_64_sol2_bed
7909 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
7911 #undef elf_backend_static_tls_alignment
7912 #define elf_backend_static_tls_alignment 16
7914 /* The Solaris 2 ABI requires a plt symbol on all platforms.
7916 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
7918 #undef elf_backend_want_plt_sym
7919 #define elf_backend_want_plt_sym 1
7921 #undef elf_backend_strtab_flags
7922 #define elf_backend_strtab_flags SHF_STRINGS
7925 elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
7926 bfd *obfd ATTRIBUTE_UNUSED,
7927 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
7928 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
7930 /* PR 19938: FIXME: Need to add code for setting the sh_info
7931 and sh_link fields of Solaris specific section types. */
7935 #undef elf_backend_copy_special_section_fields
7936 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
7938 #include "elf64-target.h"
7940 /* Native Client support. */
7943 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
7945 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
7946 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
7950 #undef TARGET_LITTLE_SYM
7951 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
7952 #undef TARGET_LITTLE_NAME
7953 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
7955 #define elf64_bed elf64_x86_64_nacl_bed
7957 #undef ELF_MAXPAGESIZE
7958 #undef ELF_MINPAGESIZE
7959 #undef ELF_COMMONPAGESIZE
7960 #define ELF_MAXPAGESIZE 0x10000
7961 #define ELF_MINPAGESIZE 0x10000
7962 #define ELF_COMMONPAGESIZE 0x10000
7964 /* Restore defaults. */
7966 #undef elf_backend_static_tls_alignment
7967 #undef elf_backend_want_plt_sym
7968 #define elf_backend_want_plt_sym 0
7969 #undef elf_backend_strtab_flags
7970 #undef elf_backend_copy_special_section_fields
7972 /* NaCl uses substantially different PLT entries for the same effects. */
7974 #undef elf_backend_plt_alignment
7975 #define elf_backend_plt_alignment 5
7976 #define NACL_PLT_ENTRY_SIZE 64
7977 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
7979 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
7981 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
7982 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
7983 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
7984 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
7985 0x41, 0xff, 0xe3, /* jmpq *%r11 */
7987 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
7988 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
7990 /* 32 bytes of nop to pad out to the standard size. */
7991 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7992 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7993 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7994 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7995 0x66, /* excess data16 prefix */
7999 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
8001 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
8002 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
8003 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
8004 0x41, 0xff, 0xe3, /* jmpq *%r11 */
8006 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
8007 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
8008 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
8010 /* Lazy GOT entries point here (32-byte aligned). */
8011 0x68, /* pushq immediate */
8012 0, 0, 0, 0, /* replaced with index into relocation table. */
8013 0xe9, /* jmp relative */
8014 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
8016 /* 22 bytes of nop to pad out to the standard size. */
8017 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
8018 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
8019 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
8022 /* .eh_frame covering the .plt section. */
8024 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
8026 #if (PLT_CIE_LENGTH != 20 \
8027 || PLT_FDE_LENGTH != 36 \
8028 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
8029 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
8030 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
8032 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
8033 0, 0, 0, 0, /* CIE ID */
8034 1, /* CIE version */
8035 'z', 'R', 0, /* Augmentation string */
8036 1, /* Code alignment factor */
8037 0x78, /* Data alignment factor */
8038 16, /* Return address column */
8039 1, /* Augmentation size */
8040 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
8041 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
8042 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
8043 DW_CFA_nop, DW_CFA_nop,
8045 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
8046 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
8047 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
8048 0, 0, 0, 0, /* .plt size goes here */
8049 0, /* Augmentation size */
8050 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
8051 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
8052 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
8053 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
8054 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
8055 13, /* Block length */
8056 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
8057 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
8058 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
8059 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
8060 DW_CFA_nop, DW_CFA_nop
8063 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt =
8065 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
8066 elf_x86_64_nacl_plt_entry, /* plt_entry */
8067 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
8068 2, /* plt0_got1_offset */
8069 9, /* plt0_got2_offset */
8070 13, /* plt0_got2_insn_end */
8071 3, /* plt_got_offset */
8072 33, /* plt_reloc_offset */
8073 38, /* plt_plt_offset */
8074 7, /* plt_got_insn_size */
8075 42, /* plt_plt_insn_end */
8076 32, /* plt_lazy_offset */
8077 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
8078 sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */
8081 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
8086 #undef elf_backend_arch_data
8087 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
8089 #undef elf_backend_object_p
8090 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
8091 #undef elf_backend_modify_segment_map
8092 #define elf_backend_modify_segment_map nacl_modify_segment_map
8093 #undef elf_backend_modify_program_headers
8094 #define elf_backend_modify_program_headers nacl_modify_program_headers
8095 #undef elf_backend_final_write_processing
8096 #define elf_backend_final_write_processing nacl_final_write_processing
8098 #include "elf64-target.h"
8100 /* Native Client x32 support. */
8103 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
8105 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
8106 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
8110 #undef TARGET_LITTLE_SYM
8111 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
8112 #undef TARGET_LITTLE_NAME
8113 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
8115 #define elf32_bed elf32_x86_64_nacl_bed
8117 #define bfd_elf32_bfd_link_hash_table_create \
8118 elf_x86_64_link_hash_table_create
8119 #define bfd_elf32_bfd_reloc_type_lookup \
8120 elf_x86_64_reloc_type_lookup
8121 #define bfd_elf32_bfd_reloc_name_lookup \
8122 elf_x86_64_reloc_name_lookup
8123 #define bfd_elf32_mkobject \
8125 #define bfd_elf32_get_synthetic_symtab \
8126 elf_x86_64_get_synthetic_symtab
8127 #define bfd_elf32_bfd_link_check_relocs \
8128 elf_x86_64_link_check_relocs
8130 #undef elf_backend_object_p
8131 #define elf_backend_object_p \
8132 elf32_x86_64_nacl_elf_object_p
8134 #undef elf_backend_bfd_from_remote_memory
8135 #define elf_backend_bfd_from_remote_memory \
8136 _bfd_elf32_bfd_from_remote_memory
8138 #undef elf_backend_size_info
8139 #define elf_backend_size_info \
8140 _bfd_elf32_size_info
8142 #include "elf32-target.h"
8144 /* Restore defaults. */
8145 #undef elf_backend_object_p
8146 #define elf_backend_object_p elf64_x86_64_elf_object_p
8147 #undef elf_backend_bfd_from_remote_memory
8148 #undef elf_backend_size_info
8149 #undef elf_backend_modify_segment_map
8150 #undef elf_backend_modify_program_headers
8151 #undef elf_backend_final_write_processing
8153 /* Intel L1OM support. */
8156 elf64_l1om_elf_object_p (bfd *abfd)
8158 /* Set the right machine number for an L1OM elf64 file. */
8159 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
8163 #undef TARGET_LITTLE_SYM
8164 #define TARGET_LITTLE_SYM l1om_elf64_vec
8165 #undef TARGET_LITTLE_NAME
8166 #define TARGET_LITTLE_NAME "elf64-l1om"
8168 #define ELF_ARCH bfd_arch_l1om
8170 #undef ELF_MACHINE_CODE
8171 #define ELF_MACHINE_CODE EM_L1OM
8176 #define elf64_bed elf64_l1om_bed
8178 #undef elf_backend_object_p
8179 #define elf_backend_object_p elf64_l1om_elf_object_p
8181 /* Restore defaults. */
8182 #undef ELF_MAXPAGESIZE
8183 #undef ELF_MINPAGESIZE
8184 #undef ELF_COMMONPAGESIZE
8185 #define ELF_MAXPAGESIZE 0x200000
8186 #define ELF_MINPAGESIZE 0x1000
8187 #define ELF_COMMONPAGESIZE 0x1000
8188 #undef elf_backend_plt_alignment
8189 #define elf_backend_plt_alignment 4
8190 #undef elf_backend_arch_data
8191 #define elf_backend_arch_data &elf_x86_64_arch_bed
8193 #include "elf64-target.h"
8195 /* FreeBSD L1OM support. */
8197 #undef TARGET_LITTLE_SYM
8198 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
8199 #undef TARGET_LITTLE_NAME
8200 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
8203 #define ELF_OSABI ELFOSABI_FREEBSD
8206 #define elf64_bed elf64_l1om_fbsd_bed
8208 #include "elf64-target.h"
8210 /* Intel K1OM support. */
8213 elf64_k1om_elf_object_p (bfd *abfd)
8215 /* Set the right machine number for an K1OM elf64 file. */
8216 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
8220 #undef TARGET_LITTLE_SYM
8221 #define TARGET_LITTLE_SYM k1om_elf64_vec
8222 #undef TARGET_LITTLE_NAME
8223 #define TARGET_LITTLE_NAME "elf64-k1om"
8225 #define ELF_ARCH bfd_arch_k1om
8227 #undef ELF_MACHINE_CODE
8228 #define ELF_MACHINE_CODE EM_K1OM
8233 #define elf64_bed elf64_k1om_bed
8235 #undef elf_backend_object_p
8236 #define elf_backend_object_p elf64_k1om_elf_object_p
8238 #undef elf_backend_static_tls_alignment
8240 #undef elf_backend_want_plt_sym
8241 #define elf_backend_want_plt_sym 0
8243 #include "elf64-target.h"
8245 /* FreeBSD K1OM support. */
8247 #undef TARGET_LITTLE_SYM
8248 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
8249 #undef TARGET_LITTLE_NAME
8250 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
8253 #define ELF_OSABI ELFOSABI_FREEBSD
8256 #define elf64_bed elf64_k1om_fbsd_bed
8258 #include "elf64-target.h"
8260 /* 32bit x86-64 support. */
8262 #undef TARGET_LITTLE_SYM
8263 #define TARGET_LITTLE_SYM x86_64_elf32_vec
8264 #undef TARGET_LITTLE_NAME
8265 #define TARGET_LITTLE_NAME "elf32-x86-64"
8269 #define ELF_ARCH bfd_arch_i386
8271 #undef ELF_MACHINE_CODE
8272 #define ELF_MACHINE_CODE EM_X86_64
8276 #undef elf_backend_object_p
8277 #define elf_backend_object_p \
8278 elf32_x86_64_elf_object_p
8280 #undef elf_backend_bfd_from_remote_memory
8281 #define elf_backend_bfd_from_remote_memory \
8282 _bfd_elf32_bfd_from_remote_memory
8284 #undef elf_backend_size_info
8285 #define elf_backend_size_info \
8286 _bfd_elf32_size_info
8288 #include "elf32-target.h"